err.no Git - linux-2.6/blob - drivers/misc/thinkpad_acpi.c

   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.20"
  25 #define TPACPI_SYSFS_VERSION 0x020200
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/kthread.h>
  58 #include <linux/freezer.h>
  59 #include <linux/delay.h>
  60
  61 #include <linux/nvram.h>
  62 #include <linux/proc_fs.h>
  63 #include <linux/sysfs.h>
  64 #include <linux/backlight.h>
  65 #include <linux/fb.h>
  66 #include <linux/platform_device.h>
  67 #include <linux/hwmon.h>
  68 #include <linux/hwmon-sysfs.h>
  69 #include <linux/input.h>
  70 #include <linux/leds.h>
  71 #include <asm/uaccess.h>
  72
  73 #include <linux/dmi.h>
  74 #include <linux/jiffies.h>
  75 #include <linux/workqueue.h>
  76
  77 #include <acpi/acpi_drivers.h>
  78 #include <acpi/acnamesp.h>
  79
  80 #include <linux/pci_ids.h>
  81
  82
  83 /* ThinkPad CMOS commands */
  84 #define TP_CMOS_VOLUME_DOWN     0
  85 #define TP_CMOS_VOLUME_UP       1
  86 #define TP_CMOS_VOLUME_MUTE     2
  87 #define TP_CMOS_BRIGHTNESS_UP   4
  88 #define TP_CMOS_BRIGHTNESS_DOWN 5
  89 #define TP_CMOS_THINKLIGHT_ON   12
  90 #define TP_CMOS_THINKLIGHT_OFF  13
  91
  92 /* NVRAM Addresses */
  93 enum tp_nvram_addr {
  94         TP_NVRAM_ADDR_HK2               = 0x57,
  95         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  96         TP_NVRAM_ADDR_VIDEO             = 0x59,
  97         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  98         TP_NVRAM_ADDR_MIXER             = 0x60,
  99 };
 100
 101 /* NVRAM bit masks */
 102 enum {
 103         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 104         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 105         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 106         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 107         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 108         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 109         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 110         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 111         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 112         TP_NVRAM_MASK_MUTE              = 0x40,
 113         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 114         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 115         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 116 };
 117
 118 /* ACPI HIDs */
 119 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 120
 121 /* Input IDs */
 122 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 123 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 124
 125
 126 /****************************************************************************
 127  * Main driver
 128  */
 129
 130 #define TPACPI_NAME "thinkpad"
 131 #define TPACPI_DESC "ThinkPad ACPI Extras"
 132 #define TPACPI_FILE TPACPI_NAME "_acpi"
 133 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 134 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 135
 136 #define TPACPI_PROC_DIR "ibm"
 137 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 138 #define TPACPI_DRVR_NAME TPACPI_FILE
 139 #define TPACPI_DRVR_SHORTNAME "tpacpi"
 140 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 141
 142 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd"
 143 #define TPACPI_WORKQUEUE_NAME "ktpacpid"
 144
 145 #define TPACPI_MAX_ACPI_ARGS 3
 146
 147 /* Debugging */
 148 #define TPACPI_LOG TPACPI_FILE ": "
 149 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 150 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 151 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 152 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 153
 154 #define TPACPI_DBG_ALL          0xffff
 155 #define TPACPI_DBG_ALL          0xffff
 156 #define TPACPI_DBG_INIT         0x0001
 157 #define TPACPI_DBG_EXIT         0x0002
 158 #define dbg_printk(a_dbg_level, format, arg...) \
 159         do { if (dbg_level & a_dbg_level) \
 160                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 161         } while (0)
 162 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 163 #define vdbg_printk(a_dbg_level, format, arg...) \
 164         dbg_printk(a_dbg_level, format, ## arg)
 165 static const char *str_supported(int is_supported);
 166 #else
 167 #define vdbg_printk(a_dbg_level, format, arg...)
 168 #endif
 169
 170 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 171 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 172 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 173
 174
 175 /****************************************************************************
 176  * Driver-wide structs and misc. variables
 177  */
 178
 179 struct ibm_struct;
 180
 181 struct tp_acpi_drv_struct {
 182         const struct acpi_device_id *hid;
 183         struct acpi_driver *driver;
 184
 185         void (*notify) (struct ibm_struct *, u32);
 186         acpi_handle *handle;
 187         u32 type;
 188         struct acpi_device *device;
 189 };
 190
 191 struct ibm_struct {
 192         char *name;
 193
 194         int (*read) (char *);
 195         int (*write) (char *);
 196         void (*exit) (void);
 197         void (*resume) (void);
 198         void (*suspend) (pm_message_t state);
 199
 200         struct list_head all_drivers;
 201
 202         struct tp_acpi_drv_struct *acpi;
 203
 204         struct {
 205                 u8 acpi_driver_registered:1;
 206                 u8 acpi_notify_installed:1;
 207                 u8 proc_created:1;
 208                 u8 init_called:1;
 209                 u8 experimental:1;
 210         } flags;
 211 };
 212
 213 struct ibm_init_struct {
 214         char param[32];
 215
 216         int (*init) (struct ibm_init_struct *);
 217         struct ibm_struct *data;
 218 };
 219
 220 static struct {
 221 #ifdef CONFIG_THINKPAD_ACPI_BAY
 222         u32 bay_status:1;
 223         u32 bay_eject:1;
 224         u32 bay_status2:1;
 225         u32 bay_eject2:1;
 226 #endif
 227         u32 bluetooth:1;
 228         u32 hotkey:1;
 229         u32 hotkey_mask:1;
 230         u32 hotkey_wlsw:1;
 231         u32 hotkey_tablet:1;
 232         u32 light:1;
 233         u32 light_status:1;
 234         u32 bright_16levels:1;
 235         u32 bright_acpimode:1;
 236         u32 wan:1;
 237         u32 fan_ctrl_status_undef:1;
 238         u32 input_device_registered:1;
 239         u32 platform_drv_registered:1;
 240         u32 platform_drv_attrs_registered:1;
 241         u32 sensors_pdrv_registered:1;
 242         u32 sensors_pdrv_attrs_registered:1;
 243         u32 sensors_pdev_attrs_registered:1;
 244         u32 hotkey_poll_active:1;
 245 } tp_features;
 246
 247 static struct {
 248         u16 hotkey_mask_ff:1;
 249         u16 bright_cmos_ec_unsync:1;
 250 } tp_warned;
 251
 252 struct thinkpad_id_data {
 253         unsigned int vendor;    /* ThinkPad vendor:
 254                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 255
 256         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 257         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 258
 259         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 260         u16 ec_model;
 261
 262         char *model_str;        /* ThinkPad T43 */
 263         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 264 };
 265 static struct thinkpad_id_data thinkpad_id;
 266
 267 static enum {
 268         TPACPI_LIFE_INIT = 0,
 269         TPACPI_LIFE_RUNNING,
 270         TPACPI_LIFE_EXITING,
 271 } tpacpi_lifecycle;
 272
 273 static int experimental;
 274 static u32 dbg_level;
 275
 276 static struct workqueue_struct *tpacpi_wq;
 277
 278 /* Special LED class that can defer work */
 279 struct tpacpi_led_classdev {
 280         struct led_classdev led_classdev;
 281         struct work_struct work;
 282         enum led_brightness new_brightness;
 283         unsigned int led;
 284 };
 285
 286 /****************************************************************************
 287  ****************************************************************************
 288  *
 289  * ACPI Helpers and device model
 290  *
 291  ****************************************************************************
 292  ****************************************************************************/
 293
 294 /*************************************************************************
 295  * ACPI basic handles
 296  */
 297
 298 static acpi_handle root_handle;
 299
 300 #define TPACPI_HANDLE(object, parent, paths...)                 \
 301         static acpi_handle  object##_handle;                    \
 302         static acpi_handle *object##_parent = &parent##_handle; \
 303         static char        *object##_path;                      \
 304         static char        *object##_paths[] = { paths }
 305
 306 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 307            "\\_SB.PCI.ISA.EC",  /* 570 */
 308            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 309            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 310            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 311            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 312            "\\_SB.PCI0.LPC.EC", /* all others */
 313            );
 314
 315 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 316 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 317
 318 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 319                                         /* T4x, X31, X40 */
 320            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 321            "\\CMS",             /* R40, R40e */
 322            );                   /* all others */
 323
 324 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 325            "^HKEY",             /* R30, R31 */
 326            "HKEY",              /* all others */
 327            );                   /* 570 */
 328
 329 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 330            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 331            "\\_SB.PCI0.VID0",   /* 770e */
 332            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 333            "\\_SB.PCI0.AGP.VID",        /* all others */
 334            );                           /* R30, R31 */
 335
 336
 337 /*************************************************************************
 338  * ACPI helpers
 339  */
 340
 341 static int acpi_evalf(acpi_handle handle,
 342                       void *res, char *method, char *fmt, ...)
 343 {
 344         char *fmt0 = fmt;
 345         struct acpi_object_list params;
 346         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 347         struct acpi_buffer result, *resultp;
 348         union acpi_object out_obj;
 349         acpi_status status;
 350         va_list ap;
 351         char res_type;
 352         int success;
 353         int quiet;
 354
 355         if (!*fmt) {
 356                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 357                 return 0;
 358         }
 359
 360         if (*fmt == 'q') {
 361                 quiet = 1;
 362                 fmt++;
 363         } else
 364                 quiet = 0;
 365
 366         res_type = *(fmt++);
 367
 368         params.count = 0;
 369         params.pointer = &in_objs[0];
 370
 371         va_start(ap, fmt);
 372         while (*fmt) {
 373                 char c = *(fmt++);
 374                 switch (c) {
 375                 case 'd':       /* int */
 376                         in_objs[params.count].integer.value = va_arg(ap, int);
 377                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 378                         break;
 379                         /* add more types as needed */
 380                 default:
 381                         printk(TPACPI_ERR "acpi_evalf() called "
 382                                "with invalid format character '%c'\n", c);
 383                         return 0;
 384                 }
 385         }
 386         va_end(ap);
 387
 388         if (res_type != 'v') {
 389                 result.length = sizeof(out_obj);
 390                 result.pointer = &out_obj;
 391                 resultp = &result;
 392         } else
 393                 resultp = NULL;
 394
 395         status = acpi_evaluate_object(handle, method, &params, resultp);
 396
 397         switch (res_type) {
 398         case 'd':               /* int */
 399                 if (res)
 400                         *(int *)res = out_obj.integer.value;
 401                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 402                 break;
 403         case 'v':               /* void */
 404                 success = status == AE_OK;
 405                 break;
 406                 /* add more types as needed */
 407         default:
 408                 printk(TPACPI_ERR "acpi_evalf() called "
 409                        "with invalid format character '%c'\n", res_type);
 410                 return 0;
 411         }
 412
 413         if (!success && !quiet)
 414                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 415                        method, fmt0, status);
 416
 417         return success;
 418 }
 419
 420 static int acpi_ec_read(int i, u8 *p)
 421 {
 422         int v;
 423
 424         if (ecrd_handle) {
 425                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 426                         return 0;
 427                 *p = v;
 428         } else {
 429                 if (ec_read(i, p) < 0)
 430                         return 0;
 431         }
 432
 433         return 1;
 434 }
 435
 436 static int acpi_ec_write(int i, u8 v)
 437 {
 438         if (ecwr_handle) {
 439                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 440                         return 0;
 441         } else {
 442                 if (ec_write(i, v) < 0)
 443                         return 0;
 444         }
 445
 446         return 1;
 447 }
 448
 449 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 450 static int _sta(acpi_handle handle)
 451 {
 452         int status;
 453
 454         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 455                 status = 0;
 456
 457         return status;
 458 }
 459 #endif
 460
 461 static int issue_thinkpad_cmos_command(int cmos_cmd)
 462 {
 463         if (!cmos_handle)
 464                 return -ENXIO;
 465
 466         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 467                 return -EIO;
 468
 469         return 0;
 470 }
 471
 472 /*************************************************************************
 473  * ACPI device model
 474  */
 475
 476 #define TPACPI_ACPIHANDLE_INIT(object) \
 477         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 478                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 479
 480 static void drv_acpi_handle_init(char *name,
 481                            acpi_handle *handle, acpi_handle parent,
 482                            char **paths, int num_paths, char **path)
 483 {
 484         int i;
 485         acpi_status status;
 486
 487         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 488                 name);
 489
 490         for (i = 0; i < num_paths; i++) {
 491                 status = acpi_get_handle(parent, paths[i], handle);
 492                 if (ACPI_SUCCESS(status)) {
 493                         *path = paths[i];
 494                         dbg_printk(TPACPI_DBG_INIT,
 495                                    "Found ACPI handle %s for %s\n",
 496                                    *path, name);
 497                         return;
 498                 }
 499         }
 500
 501         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 502                     name);
 503         *handle = NULL;
 504 }
 505
 506 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 507 {
 508         struct ibm_struct *ibm = data;
 509
 510         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 511                 return;
 512
 513         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 514                 return;
 515
 516         ibm->acpi->notify(ibm, event);
 517 }
 518
 519 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 520 {
 521         acpi_status status;
 522         int rc;
 523
 524         BUG_ON(!ibm->acpi);
 525
 526         if (!*ibm->acpi->handle)
 527                 return 0;
 528
 529         vdbg_printk(TPACPI_DBG_INIT,
 530                 "setting up ACPI notify for %s\n", ibm->name);
 531
 532         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 533         if (rc < 0) {
 534                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 535                         ibm->name, rc);
 536                 return -ENODEV;
 537         }
 538
 539         acpi_driver_data(ibm->acpi->device) = ibm;
 540         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 541                 TPACPI_ACPI_EVENT_PREFIX,
 542                 ibm->name);
 543
 544         status = acpi_install_notify_handler(*ibm->acpi->handle,
 545                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 546         if (ACPI_FAILURE(status)) {
 547                 if (status == AE_ALREADY_EXISTS) {
 548                         printk(TPACPI_NOTICE
 549                                "another device driver is already "
 550                                "handling %s events\n", ibm->name);
 551                 } else {
 552                         printk(TPACPI_ERR
 553                                "acpi_install_notify_handler(%s) failed: %d\n",
 554                                ibm->name, status);
 555                 }
 556                 return -ENODEV;
 557         }
 558         ibm->flags.acpi_notify_installed = 1;
 559         return 0;
 560 }
 561
 562 static int __init tpacpi_device_add(struct acpi_device *device)
 563 {
 564         return 0;
 565 }
 566
 567 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 568 {
 569         int rc;
 570
 571         dbg_printk(TPACPI_DBG_INIT,
 572                 "registering %s as an ACPI driver\n", ibm->name);
 573
 574         BUG_ON(!ibm->acpi);
 575
 576         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 577         if (!ibm->acpi->driver) {
 578                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
 579                 return -ENOMEM;
 580         }
 581
 582         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 583         ibm->acpi->driver->ids = ibm->acpi->hid;
 584
 585         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 586
 587         rc = acpi_bus_register_driver(ibm->acpi->driver);
 588         if (rc < 0) {
 589                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 590                        ibm->name, rc);
 591                 kfree(ibm->acpi->driver);
 592                 ibm->acpi->driver = NULL;
 593         } else if (!rc)
 594                 ibm->flags.acpi_driver_registered = 1;
 595
 596         return rc;
 597 }
 598
 599
 600 /****************************************************************************
 601  ****************************************************************************
 602  *
 603  * Procfs Helpers
 604  *
 605  ****************************************************************************
 606  ****************************************************************************/
 607
 608 static int dispatch_procfs_read(char *page, char **start, off_t off,
 609                         int count, int *eof, void *data)
 610 {
 611         struct ibm_struct *ibm = data;
 612         int len;
 613
 614         if (!ibm || !ibm->read)
 615                 return -EINVAL;
 616
 617         len = ibm->read(page);
 618         if (len < 0)
 619                 return len;
 620
 621         if (len <= off + count)
 622                 *eof = 1;
 623         *start = page + off;
 624         len -= off;
 625         if (len > count)
 626                 len = count;
 627         if (len < 0)
 628                 len = 0;
 629
 630         return len;
 631 }
 632
 633 static int dispatch_procfs_write(struct file *file,
 634                         const char __user *userbuf,
 635                         unsigned long count, void *data)
 636 {
 637         struct ibm_struct *ibm = data;
 638         char *kernbuf;
 639         int ret;
 640
 641         if (!ibm || !ibm->write)
 642                 return -EINVAL;
 643
 644         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 645         if (!kernbuf)
 646                 return -ENOMEM;
 647
 648         if (copy_from_user(kernbuf, userbuf, count)) {
 649                 kfree(kernbuf);
 650                 return -EFAULT;
 651         }
 652
 653         kernbuf[count] = 0;
 654         strcat(kernbuf, ",");
 655         ret = ibm->write(kernbuf);
 656         if (ret == 0)
 657                 ret = count;
 658
 659         kfree(kernbuf);
 660
 661         return ret;
 662 }
 663
 664 static char *next_cmd(char **cmds)
 665 {
 666         char *start = *cmds;
 667         char *end;
 668
 669         while ((end = strchr(start, ',')) && end == start)
 670                 start = end + 1;
 671
 672         if (!end)
 673                 return NULL;
 674
 675         *end = 0;
 676         *cmds = end + 1;
 677         return start;
 678 }
 679
 680
 681 /****************************************************************************
 682  ****************************************************************************
 683  *
 684  * Device model: input, hwmon and platform
 685  *
 686  ****************************************************************************
 687  ****************************************************************************/
 688
 689 static struct platform_device *tpacpi_pdev;
 690 static struct platform_device *tpacpi_sensors_pdev;
 691 static struct device *tpacpi_hwmon;
 692 static struct input_dev *tpacpi_inputdev;
 693 static struct mutex tpacpi_inputdev_send_mutex;
 694 static LIST_HEAD(tpacpi_all_drivers);
 695
 696 static int tpacpi_suspend_handler(struct platform_device *pdev,
 697                                   pm_message_t state)
 698 {
 699         struct ibm_struct *ibm, *itmp;
 700
 701         list_for_each_entry_safe(ibm, itmp,
 702                                  &tpacpi_all_drivers,
 703                                  all_drivers) {
 704                 if (ibm->suspend)
 705                         (ibm->suspend)(state);
 706         }
 707
 708         return 0;
 709 }
 710
 711 static int tpacpi_resume_handler(struct platform_device *pdev)
 712 {
 713         struct ibm_struct *ibm, *itmp;
 714
 715         list_for_each_entry_safe(ibm, itmp,
 716                                  &tpacpi_all_drivers,
 717                                  all_drivers) {
 718                 if (ibm->resume)
 719                         (ibm->resume)();
 720         }
 721
 722         return 0;
 723 }
 724
 725 static struct platform_driver tpacpi_pdriver = {
 726         .driver = {
 727                 .name = TPACPI_DRVR_NAME,
 728                 .owner = THIS_MODULE,
 729         },
 730         .suspend = tpacpi_suspend_handler,
 731         .resume = tpacpi_resume_handler,
 732 };
 733
 734 static struct platform_driver tpacpi_hwmon_pdriver = {
 735         .driver = {
 736                 .name = TPACPI_HWMON_DRVR_NAME,
 737                 .owner = THIS_MODULE,
 738         },
 739 };
 740
 741 /*************************************************************************
 742  * sysfs support helpers
 743  */
 744
 745 struct attribute_set {
 746         unsigned int members, max_members;
 747         struct attribute_group group;
 748 };
 749
 750 struct attribute_set_obj {
 751         struct attribute_set s;
 752         struct attribute *a;
 753 } __attribute__((packed));
 754
 755 static struct attribute_set *create_attr_set(unsigned int max_members,
 756                                                 const char *name)
 757 {
 758         struct attribute_set_obj *sobj;
 759
 760         if (max_members == 0)
 761                 return NULL;
 762
 763         /* Allocates space for implicit NULL at the end too */
 764         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 765                     max_members * sizeof(struct attribute *),
 766                     GFP_KERNEL);
 767         if (!sobj)
 768                 return NULL;
 769         sobj->s.max_members = max_members;
 770         sobj->s.group.attrs = &sobj->a;
 771         sobj->s.group.name = name;
 772
 773         return &sobj->s;
 774 }
 775
 776 #define destroy_attr_set(_set) \
 777         kfree(_set);
 778
 779 /* not multi-threaded safe, use it in a single thread per set */
 780 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 781 {
 782         if (!s || !attr)
 783                 return -EINVAL;
 784
 785         if (s->members >= s->max_members)
 786                 return -ENOMEM;
 787
 788         s->group.attrs[s->members] = attr;
 789         s->members++;
 790
 791         return 0;
 792 }
 793
 794 static int add_many_to_attr_set(struct attribute_set *s,
 795                         struct attribute **attr,
 796                         unsigned int count)
 797 {
 798         int i, res;
 799
 800         for (i = 0; i < count; i++) {
 801                 res = add_to_attr_set(s, attr[i]);
 802                 if (res)
 803                         return res;
 804         }
 805
 806         return 0;
 807 }
 808
 809 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 810 {
 811         sysfs_remove_group(kobj, &s->group);
 812         destroy_attr_set(s);
 813 }
 814
 815 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 816         sysfs_create_group(_kobj, &_attr_set->group)
 817
 818 static int parse_strtoul(const char *buf,
 819                 unsigned long max, unsigned long *value)
 820 {
 821         char *endp;
 822
 823         while (*buf && isspace(*buf))
 824                 buf++;
 825         *value = simple_strtoul(buf, &endp, 0);
 826         while (*endp && isspace(*endp))
 827                 endp++;
 828         if (*endp || *value > max)
 829                 return -EINVAL;
 830
 831         return 0;
 832 }
 833
 834 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 835 {
 836         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 837         union acpi_object *obj;
 838         int rc;
 839
 840         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 841                 obj = (union acpi_object *)buffer.pointer;
 842                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 843                         printk(TPACPI_ERR "Unknown _BCL data, "
 844                                "please report this to %s\n", TPACPI_MAIL);
 845                         rc = 0;
 846                 } else {
 847                         rc = obj->package.count;
 848                 }
 849         } else {
 850                 return 0;
 851         }
 852
 853         kfree(buffer.pointer);
 854         return rc;
 855 }
 856
 857 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 858                                         u32 lvl, void *context, void **rv)
 859 {
 860         char name[ACPI_PATH_SEGMENT_LENGTH];
 861         struct acpi_buffer buffer = { sizeof(name), &name };
 862
 863         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 864             !strncmp("_BCL", name, sizeof(name) - 1)) {
 865                 BUG_ON(!rv || !*rv);
 866                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 867                 return AE_CTRL_TERMINATE;
 868         } else {
 869                 return AE_OK;
 870         }
 871 }
 872
 873 /*
 874  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 875  */
 876 static int __init tpacpi_check_std_acpi_brightness_support(void)
 877 {
 878         int status;
 879         int bcl_levels = 0;
 880         void *bcl_ptr = &bcl_levels;
 881
 882         if (!vid_handle) {
 883                 TPACPI_ACPIHANDLE_INIT(vid);
 884         }
 885         if (!vid_handle)
 886                 return 0;
 887
 888         /*
 889          * Search for a _BCL method, and execute it.  This is safe on all
 890          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 891          * BIOS in ACPI backlight control mode.  We do NOT have to care
 892          * about calling the _BCL method in an enabled video device, any
 893          * will do for our purposes.
 894          */
 895
 896         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 897                                      tpacpi_acpi_walk_find_bcl, NULL,
 898                                      &bcl_ptr);
 899
 900         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 901                 tp_features.bright_acpimode = 1;
 902                 return (bcl_levels - 2);
 903         }
 904
 905         return 0;
 906 }
 907
 908 /*************************************************************************
 909  * thinkpad-acpi driver attributes
 910  */
 911
 912 /* interface_version --------------------------------------------------- */
 913 static ssize_t tpacpi_driver_interface_version_show(
 914                                 struct device_driver *drv,
 915                                 char *buf)
 916 {
 917         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 918 }
 919
 920 static DRIVER_ATTR(interface_version, S_IRUGO,
 921                 tpacpi_driver_interface_version_show, NULL);
 922
 923 /* debug_level --------------------------------------------------------- */
 924 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 925                                                 char *buf)
 926 {
 927         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 928 }
 929
 930 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 931                                                 const char *buf, size_t count)
 932 {
 933         unsigned long t;
 934
 935         if (parse_strtoul(buf, 0xffff, &t))
 936                 return -EINVAL;
 937
 938         dbg_level = t;
 939
 940         return count;
 941 }
 942
 943 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 944                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 945
 946 /* version ------------------------------------------------------------- */
 947 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 948                                                 char *buf)
 949 {
 950         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
 951                         TPACPI_DESC, TPACPI_VERSION);
 952 }
 953
 954 static DRIVER_ATTR(version, S_IRUGO,
 955                 tpacpi_driver_version_show, NULL);
 956
 957 /* --------------------------------------------------------------------- */
 958
 959 static struct driver_attribute *tpacpi_driver_attributes[] = {
 960         &driver_attr_debug_level, &driver_attr_version,
 961         &driver_attr_interface_version,
 962 };
 963
 964 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 965 {
 966         int i, res;
 967
 968         i = 0;
 969         res = 0;
 970         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 971                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 972                 i++;
 973         }
 974
 975         return res;
 976 }
 977
 978 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 979 {
 980         int i;
 981
 982         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 983                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 984 }
 985
 986 /****************************************************************************
 987  ****************************************************************************
 988  *
 989  * Subdrivers
 990  *
 991  ****************************************************************************
 992  ****************************************************************************/
 993
 994 /*************************************************************************
 995  * thinkpad-acpi init subdriver
 996  */
 997
 998 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 999 {
1000         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
1001         printk(TPACPI_INFO "%s\n", TPACPI_URL);
1002
1003         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1004                 (thinkpad_id.bios_version_str) ?
1005                         thinkpad_id.bios_version_str : "unknown",
1006                 (thinkpad_id.ec_version_str) ?
1007                         thinkpad_id.ec_version_str : "unknown");
1008
1009         if (thinkpad_id.vendor && thinkpad_id.model_str)
1010                 printk(TPACPI_INFO "%s %s, model %s\n",
1011                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1012                                 "IBM" : ((thinkpad_id.vendor ==
1013                                                 PCI_VENDOR_ID_LENOVO) ?
1014                                         "Lenovo" : "Unknown vendor"),
1015                         thinkpad_id.model_str,
1016                         (thinkpad_id.nummodel_str) ?
1017                                 thinkpad_id.nummodel_str : "unknown");
1018
1019         return 0;
1020 }
1021
1022 static int thinkpad_acpi_driver_read(char *p)
1023 {
1024         int len = 0;
1025
1026         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1027         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1028
1029         return len;
1030 }
1031
1032 static struct ibm_struct thinkpad_acpi_driver_data = {
1033         .name = "driver",
1034         .read = thinkpad_acpi_driver_read,
1035 };
1036
1037 /*************************************************************************
1038  * Hotkey subdriver
1039  */
1040
1041 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1042         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1043         TP_ACPI_HOTKEYSCAN_FNF2,
1044         TP_ACPI_HOTKEYSCAN_FNF3,
1045         TP_ACPI_HOTKEYSCAN_FNF4,
1046         TP_ACPI_HOTKEYSCAN_FNF5,
1047         TP_ACPI_HOTKEYSCAN_FNF6,
1048         TP_ACPI_HOTKEYSCAN_FNF7,
1049         TP_ACPI_HOTKEYSCAN_FNF8,
1050         TP_ACPI_HOTKEYSCAN_FNF9,
1051         TP_ACPI_HOTKEYSCAN_FNF10,
1052         TP_ACPI_HOTKEYSCAN_FNF11,
1053         TP_ACPI_HOTKEYSCAN_FNF12,
1054         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1055         TP_ACPI_HOTKEYSCAN_FNINSERT,
1056         TP_ACPI_HOTKEYSCAN_FNDELETE,
1057         TP_ACPI_HOTKEYSCAN_FNHOME,
1058         TP_ACPI_HOTKEYSCAN_FNEND,
1059         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1060         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1061         TP_ACPI_HOTKEYSCAN_FNSPACE,
1062         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1063         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1064         TP_ACPI_HOTKEYSCAN_MUTE,
1065         TP_ACPI_HOTKEYSCAN_THINKPAD,
1066 };
1067
1068 enum {  /* Keys available through NVRAM polling */
1069         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1070         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1071 };
1072
1073 enum {  /* Positions of some of the keys in hotkey masks */
1074         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1075         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1076         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1077         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1078         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1079         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1080         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1081         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1082         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1083         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1084         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1085 };
1086
1087 enum {  /* NVRAM to ACPI HKEY group map */
1088         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1089                                           TP_ACPI_HKEY_ZOOM_MASK |
1090                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1091                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1092         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1093                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1094         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1095                                           TP_ACPI_HKEY_VOLDWN_MASK |
1096                                           TP_ACPI_HKEY_MUTE_MASK,
1097 };
1098
1099 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1100 struct tp_nvram_state {
1101        u16 thinkpad_toggle:1;
1102        u16 zoom_toggle:1;
1103        u16 display_toggle:1;
1104        u16 thinklight_toggle:1;
1105        u16 hibernate_toggle:1;
1106        u16 displayexp_toggle:1;
1107        u16 display_state:1;
1108        u16 brightness_toggle:1;
1109        u16 volume_toggle:1;
1110        u16 mute:1;
1111
1112        u8 brightness_level;
1113        u8 volume_level;
1114 };
1115
1116 static struct task_struct *tpacpi_hotkey_task;
1117 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1118 static int hotkey_poll_freq = 10;       /* Hz */
1119 static struct mutex hotkey_thread_mutex;
1120 static struct mutex hotkey_thread_data_mutex;
1121 static unsigned int hotkey_config_change;
1122
1123 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1124
1125 #define hotkey_source_mask 0U
1126
1127 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1128
1129 static struct mutex hotkey_mutex;
1130
1131 static enum {   /* Reasons for waking up */
1132         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1133         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1134         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1135 } hotkey_wakeup_reason;
1136
1137 static int hotkey_autosleep_ack;
1138
1139 static int hotkey_orig_status;
1140 static u32 hotkey_orig_mask;
1141 static u32 hotkey_all_mask;
1142 static u32 hotkey_reserved_mask;
1143 static u32 hotkey_mask;
1144
1145 static unsigned int hotkey_report_mode;
1146
1147 static u16 *hotkey_keycode_map;
1148
1149 static struct attribute_set *hotkey_dev_attributes;
1150
1151 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1152 #define HOTKEY_CONFIG_CRITICAL_START \
1153         do { \
1154                 mutex_lock(&hotkey_thread_data_mutex); \
1155                 hotkey_config_change++; \
1156         } while (0);
1157 #define HOTKEY_CONFIG_CRITICAL_END \
1158         mutex_unlock(&hotkey_thread_data_mutex);
1159 #else
1160 #define HOTKEY_CONFIG_CRITICAL_START
1161 #define HOTKEY_CONFIG_CRITICAL_END
1162 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1163
1164 /* HKEY.MHKG() return bits */
1165 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1166
1167 static int hotkey_get_wlsw(int *status)
1168 {
1169         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1170                 return -EIO;
1171         return 0;
1172 }
1173
1174 static int hotkey_get_tablet_mode(int *status)
1175 {
1176         int s;
1177
1178         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1179                 return -EIO;
1180
1181         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1182         return 0;
1183 }
1184
1185 /*
1186  * Call with hotkey_mutex held
1187  */
1188 static int hotkey_mask_get(void)
1189 {
1190         u32 m = 0;
1191
1192         if (tp_features.hotkey_mask) {
1193                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1194                         return -EIO;
1195         }
1196         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1197
1198         return 0;
1199 }
1200
1201 /*
1202  * Call with hotkey_mutex held
1203  */
1204 static int hotkey_mask_set(u32 mask)
1205 {
1206         int i;
1207         int rc = 0;
1208
1209         if (tp_features.hotkey_mask) {
1210                 if (!tp_warned.hotkey_mask_ff &&
1211                     (mask == 0xffff || mask == 0xffffff ||
1212                      mask == 0xffffffff)) {
1213                         tp_warned.hotkey_mask_ff = 1;
1214                         printk(TPACPI_NOTICE
1215                                "setting the hotkey mask to 0x%08x is likely "
1216                                "not the best way to go about it\n", mask);
1217                         printk(TPACPI_NOTICE
1218                                "please consider using the driver defaults, "
1219                                "and refer to up-to-date thinkpad-acpi "
1220                                "documentation\n");
1221                 }
1222
1223                 HOTKEY_CONFIG_CRITICAL_START
1224                 for (i = 0; i < 32; i++) {
1225                         u32 m = 1 << i;
1226                         /* enable in firmware mask only keys not in NVRAM
1227                          * mode, but enable the key in the cached hotkey_mask
1228                          * regardless of mode, or the key will end up
1229                          * disabled by hotkey_mask_get() */
1230                         if (!acpi_evalf(hkey_handle,
1231                                         NULL, "MHKM", "vdd", i + 1,
1232                                         !!((mask & ~hotkey_source_mask) & m))) {
1233                                 rc = -EIO;
1234                                 break;
1235                         } else {
1236                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1237                         }
1238                 }
1239                 HOTKEY_CONFIG_CRITICAL_END
1240
1241                 /* hotkey_mask_get must be called unconditionally below */
1242                 if (!hotkey_mask_get() && !rc &&
1243                     (hotkey_mask & ~hotkey_source_mask) !=
1244                      (mask & ~hotkey_source_mask)) {
1245                         printk(TPACPI_NOTICE
1246                                "requested hot key mask 0x%08x, but "
1247                                "firmware forced it to 0x%08x\n",
1248                                mask, hotkey_mask);
1249                 }
1250         } else {
1251 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1252                 HOTKEY_CONFIG_CRITICAL_START
1253                 hotkey_mask = mask & hotkey_source_mask;
1254                 HOTKEY_CONFIG_CRITICAL_END
1255                 hotkey_mask_get();
1256                 if (hotkey_mask != mask) {
1257                         printk(TPACPI_NOTICE
1258                                "requested hot key mask 0x%08x, "
1259                                "forced to 0x%08x (NVRAM poll mask is "
1260                                "0x%08x): no firmware mask support\n",
1261                                mask, hotkey_mask, hotkey_source_mask);
1262                 }
1263 #else
1264                 hotkey_mask_get();
1265                 rc = -ENXIO;
1266 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1267         }
1268
1269         return rc;
1270 }
1271
1272 static int hotkey_status_get(int *status)
1273 {
1274         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1275                 return -EIO;
1276
1277         return 0;
1278 }
1279
1280 static int hotkey_status_set(int status)
1281 {
1282         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1283                 return -EIO;
1284
1285         return 0;
1286 }
1287
1288 static void tpacpi_input_send_tabletsw(void)
1289 {
1290         int state;
1291
1292         if (tp_features.hotkey_tablet &&
1293             !hotkey_get_tablet_mode(&state)) {
1294                 mutex_lock(&tpacpi_inputdev_send_mutex);
1295
1296                 input_report_switch(tpacpi_inputdev,
1297                                     SW_TABLET_MODE, !!state);
1298                 input_sync(tpacpi_inputdev);
1299
1300                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1301         }
1302 }
1303
1304 static void tpacpi_input_send_key(unsigned int scancode)
1305 {
1306         unsigned int keycode;
1307
1308         keycode = hotkey_keycode_map[scancode];
1309
1310         if (keycode != KEY_RESERVED) {
1311                 mutex_lock(&tpacpi_inputdev_send_mutex);
1312
1313                 input_report_key(tpacpi_inputdev, keycode, 1);
1314                 if (keycode == KEY_UNKNOWN)
1315                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1316                                     scancode);
1317                 input_sync(tpacpi_inputdev);
1318
1319                 input_report_key(tpacpi_inputdev, keycode, 0);
1320                 if (keycode == KEY_UNKNOWN)
1321                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1322                                     scancode);
1323                 input_sync(tpacpi_inputdev);
1324
1325                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1326         }
1327 }
1328
1329 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1330 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1331
1332 static void tpacpi_hotkey_send_key(unsigned int scancode)
1333 {
1334         tpacpi_input_send_key(scancode);
1335         if (hotkey_report_mode < 2) {
1336                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1337                                                 0x80, 0x1001 + scancode);
1338         }
1339 }
1340
1341 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1342 {
1343         u8 d;
1344
1345         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1346                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1347                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1348                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1349                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1350                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1351         }
1352         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1353                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1354                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1355         }
1356         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1357                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1358                 n->displayexp_toggle =
1359                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1360         }
1361         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1362                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1363                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1364                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1365                 n->brightness_toggle =
1366                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1367         }
1368         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1369                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1370                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1371                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1372                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1373                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1374         }
1375 }
1376
1377 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1378         do { \
1379                 if ((mask & (1 << __scancode)) && \
1380                     oldn->__member != newn->__member) \
1381                 tpacpi_hotkey_send_key(__scancode); \
1382         } while (0)
1383
1384 #define TPACPI_MAY_SEND_KEY(__scancode) \
1385         do { if (mask & (1 << __scancode)) \
1386                 tpacpi_hotkey_send_key(__scancode); } while (0)
1387
1388 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1389                                            struct tp_nvram_state *newn,
1390                                            u32 mask)
1391 {
1392         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1393         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1394         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1395         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1396
1397         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1398
1399         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1400
1401         /* handle volume */
1402         if (oldn->volume_toggle != newn->volume_toggle) {
1403                 if (oldn->mute != newn->mute) {
1404                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1405                 }
1406                 if (oldn->volume_level > newn->volume_level) {
1407                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1408                 } else if (oldn->volume_level < newn->volume_level) {
1409                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1410                 } else if (oldn->mute == newn->mute) {
1411                         /* repeated key presses that didn't change state */
1412                         if (newn->mute) {
1413                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1414                         } else if (newn->volume_level != 0) {
1415                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1416                         } else {
1417                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1418                         }
1419                 }
1420         }
1421
1422         /* handle brightness */
1423         if (oldn->brightness_toggle != newn->brightness_toggle) {
1424                 if (oldn->brightness_level < newn->brightness_level) {
1425                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1426                 } else if (oldn->brightness_level > newn->brightness_level) {
1427                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1428                 } else {
1429                         /* repeated key presses that didn't change state */
1430                         if (newn->brightness_level != 0) {
1431                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1432                         } else {
1433                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1434                         }
1435                 }
1436         }
1437 }
1438
1439 #undef TPACPI_COMPARE_KEY
1440 #undef TPACPI_MAY_SEND_KEY
1441
1442 static int hotkey_kthread(void *data)
1443 {
1444         struct tp_nvram_state s[2];
1445         u32 mask;
1446         unsigned int si, so;
1447         unsigned long t;
1448         unsigned int change_detector, must_reset;
1449
1450         mutex_lock(&hotkey_thread_mutex);
1451
1452         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1453                 goto exit;
1454
1455         set_freezable();
1456
1457         so = 0;
1458         si = 1;
1459         t = 0;
1460
1461         /* Initial state for compares */
1462         mutex_lock(&hotkey_thread_data_mutex);
1463         change_detector = hotkey_config_change;
1464         mask = hotkey_source_mask & hotkey_mask;
1465         mutex_unlock(&hotkey_thread_data_mutex);
1466         hotkey_read_nvram(&s[so], mask);
1467
1468         while (!kthread_should_stop() && hotkey_poll_freq) {
1469                 if (t == 0)
1470                         t = 1000/hotkey_poll_freq;
1471                 t = msleep_interruptible(t);
1472                 if (unlikely(kthread_should_stop()))
1473                         break;
1474                 must_reset = try_to_freeze();
1475                 if (t > 0 && !must_reset)
1476                         continue;
1477
1478                 mutex_lock(&hotkey_thread_data_mutex);
1479                 if (must_reset || hotkey_config_change != change_detector) {
1480                         /* forget old state on thaw or config change */
1481                         si = so;
1482                         t = 0;
1483                         change_detector = hotkey_config_change;
1484                 }
1485                 mask = hotkey_source_mask & hotkey_mask;
1486                 mutex_unlock(&hotkey_thread_data_mutex);
1487
1488                 if (likely(mask)) {
1489                         hotkey_read_nvram(&s[si], mask);
1490                         if (likely(si != so)) {
1491                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1492                                                                 mask);
1493                         }
1494                 }
1495
1496                 so = si;
1497                 si ^= 1;
1498         }
1499
1500 exit:
1501         mutex_unlock(&hotkey_thread_mutex);
1502         return 0;
1503 }
1504
1505 static void hotkey_poll_stop_sync(void)
1506 {
1507         if (tpacpi_hotkey_task) {
1508                 if (frozen(tpacpi_hotkey_task) ||
1509                     freezing(tpacpi_hotkey_task))
1510                         thaw_process(tpacpi_hotkey_task);
1511
1512                 kthread_stop(tpacpi_hotkey_task);
1513                 tpacpi_hotkey_task = NULL;
1514                 mutex_lock(&hotkey_thread_mutex);
1515                 /* at this point, the thread did exit */
1516                 mutex_unlock(&hotkey_thread_mutex);
1517         }
1518 }
1519
1520 /* call with hotkey_mutex held */
1521 static void hotkey_poll_setup(int may_warn)
1522 {
1523         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1524             hotkey_poll_freq > 0 &&
1525             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1526                 if (!tpacpi_hotkey_task) {
1527                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1528                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1529                         if (IS_ERR(tpacpi_hotkey_task)) {
1530                                 tpacpi_hotkey_task = NULL;
1531                                 printk(TPACPI_ERR
1532                                        "could not create kernel thread "
1533                                        "for hotkey polling\n");
1534                         }
1535                 }
1536         } else {
1537                 hotkey_poll_stop_sync();
1538                 if (may_warn &&
1539                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1540                         printk(TPACPI_NOTICE
1541                                 "hot keys 0x%08x require polling, "
1542                                 "which is currently disabled\n",
1543                                 hotkey_source_mask);
1544                 }
1545         }
1546 }
1547
1548 static void hotkey_poll_setup_safe(int may_warn)
1549 {
1550         mutex_lock(&hotkey_mutex);
1551         hotkey_poll_setup(may_warn);
1552         mutex_unlock(&hotkey_mutex);
1553 }
1554
1555 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1556
1557 static void hotkey_poll_setup_safe(int __unused)
1558 {
1559 }
1560
1561 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1562
1563 static int hotkey_inputdev_open(struct input_dev *dev)
1564 {
1565         switch (tpacpi_lifecycle) {
1566         case TPACPI_LIFE_INIT:
1567                 /*
1568                  * hotkey_init will call hotkey_poll_setup_safe
1569                  * at the appropriate moment
1570                  */
1571                 return 0;
1572         case TPACPI_LIFE_EXITING:
1573                 return -EBUSY;
1574         case TPACPI_LIFE_RUNNING:
1575                 hotkey_poll_setup_safe(0);
1576                 return 0;
1577         }
1578
1579         /* Should only happen if tpacpi_lifecycle is corrupt */
1580         BUG();
1581         return -EBUSY;
1582 }
1583
1584 static void hotkey_inputdev_close(struct input_dev *dev)
1585 {
1586         /* disable hotkey polling when possible */
1587         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1588                 hotkey_poll_setup_safe(0);
1589 }
1590
1591 /* sysfs hotkey enable ------------------------------------------------- */
1592 static ssize_t hotkey_enable_show(struct device *dev,
1593                            struct device_attribute *attr,
1594                            char *buf)
1595 {
1596         int res, status;
1597
1598         res = hotkey_status_get(&status);
1599         if (res)
1600                 return res;
1601
1602         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1603 }
1604
1605 static ssize_t hotkey_enable_store(struct device *dev,
1606                             struct device_attribute *attr,
1607                             const char *buf, size_t count)
1608 {
1609         unsigned long t;
1610         int res;
1611
1612         if (parse_strtoul(buf, 1, &t))
1613                 return -EINVAL;
1614
1615         res = hotkey_status_set(t);
1616
1617         return (res) ? res : count;
1618 }
1619
1620 static struct device_attribute dev_attr_hotkey_enable =
1621         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1622                 hotkey_enable_show, hotkey_enable_store);
1623
1624 /* sysfs hotkey mask --------------------------------------------------- */
1625 static ssize_t hotkey_mask_show(struct device *dev,
1626                            struct device_attribute *attr,
1627                            char *buf)
1628 {
1629         int res;
1630
1631         if (mutex_lock_interruptible(&hotkey_mutex))
1632                 return -ERESTARTSYS;
1633         res = hotkey_mask_get();
1634         mutex_unlock(&hotkey_mutex);
1635
1636         return (res)?
1637                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1638 }
1639
1640 static ssize_t hotkey_mask_store(struct device *dev,
1641                             struct device_attribute *attr,
1642                             const char *buf, size_t count)
1643 {
1644         unsigned long t;
1645         int res;
1646
1647         if (parse_strtoul(buf, 0xffffffffUL, &t))
1648                 return -EINVAL;
1649
1650         if (mutex_lock_interruptible(&hotkey_mutex))
1651                 return -ERESTARTSYS;
1652
1653         res = hotkey_mask_set(t);
1654
1655 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1656         hotkey_poll_setup(1);
1657 #endif
1658
1659         mutex_unlock(&hotkey_mutex);
1660
1661         return (res) ? res : count;
1662 }
1663
1664 static struct device_attribute dev_attr_hotkey_mask =
1665         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1666                 hotkey_mask_show, hotkey_mask_store);
1667
1668 /* sysfs hotkey bios_enabled ------------------------------------------- */
1669 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1670                            struct device_attribute *attr,
1671                            char *buf)
1672 {
1673         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1674 }
1675
1676 static struct device_attribute dev_attr_hotkey_bios_enabled =
1677         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1678
1679 /* sysfs hotkey bios_mask ---------------------------------------------- */
1680 static ssize_t hotkey_bios_mask_show(struct device *dev,
1681                            struct device_attribute *attr,
1682                            char *buf)
1683 {
1684         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1685 }
1686
1687 static struct device_attribute dev_attr_hotkey_bios_mask =
1688         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1689
1690 /* sysfs hotkey all_mask ----------------------------------------------- */
1691 static ssize_t hotkey_all_mask_show(struct device *dev,
1692                            struct device_attribute *attr,
1693                            char *buf)
1694 {
1695         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1696                                 hotkey_all_mask | hotkey_source_mask);
1697 }
1698
1699 static struct device_attribute dev_attr_hotkey_all_mask =
1700         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1701
1702 /* sysfs hotkey recommended_mask --------------------------------------- */
1703 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1704                                             struct device_attribute *attr,
1705                                             char *buf)
1706 {
1707         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1708                         (hotkey_all_mask | hotkey_source_mask)
1709                         & ~hotkey_reserved_mask);
1710 }
1711
1712 static struct device_attribute dev_attr_hotkey_recommended_mask =
1713         __ATTR(hotkey_recommended_mask, S_IRUGO,
1714                 hotkey_recommended_mask_show, NULL);
1715
1716 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1717
1718 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1719 static ssize_t hotkey_source_mask_show(struct device *dev,
1720                            struct device_attribute *attr,
1721                            char *buf)
1722 {
1723         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1724 }
1725
1726 static ssize_t hotkey_source_mask_store(struct device *dev,
1727                             struct device_attribute *attr,
1728                             const char *buf, size_t count)
1729 {
1730         unsigned long t;
1731
1732         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1733                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1734                 return -EINVAL;
1735
1736         if (mutex_lock_interruptible(&hotkey_mutex))
1737                 return -ERESTARTSYS;
1738
1739         HOTKEY_CONFIG_CRITICAL_START
1740         hotkey_source_mask = t;
1741         HOTKEY_CONFIG_CRITICAL_END
1742
1743         hotkey_poll_setup(1);
1744
1745         mutex_unlock(&hotkey_mutex);
1746
1747         return count;
1748 }
1749
1750 static struct device_attribute dev_attr_hotkey_source_mask =
1751         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1752                 hotkey_source_mask_show, hotkey_source_mask_store);
1753
1754 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1755 static ssize_t hotkey_poll_freq_show(struct device *dev,
1756                            struct device_attribute *attr,
1757                            char *buf)
1758 {
1759         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1760 }
1761
1762 static ssize_t hotkey_poll_freq_store(struct device *dev,
1763                             struct device_attribute *attr,
1764                             const char *buf, size_t count)
1765 {
1766         unsigned long t;
1767
1768         if (parse_strtoul(buf, 25, &t))
1769                 return -EINVAL;
1770
1771         if (mutex_lock_interruptible(&hotkey_mutex))
1772                 return -ERESTARTSYS;
1773
1774         hotkey_poll_freq = t;
1775
1776         hotkey_poll_setup(1);
1777         mutex_unlock(&hotkey_mutex);
1778
1779         return count;
1780 }
1781
1782 static struct device_attribute dev_attr_hotkey_poll_freq =
1783         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1784                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1785
1786 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1787
1788 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1789 static ssize_t hotkey_radio_sw_show(struct device *dev,
1790                            struct device_attribute *attr,
1791                            char *buf)
1792 {
1793         int res, s;
1794         res = hotkey_get_wlsw(&s);
1795         if (res < 0)
1796                 return res;
1797
1798         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1799 }
1800
1801 static struct device_attribute dev_attr_hotkey_radio_sw =
1802         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1803
1804 static void hotkey_radio_sw_notify_change(void)
1805 {
1806         if (tp_features.hotkey_wlsw)
1807                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1808                              "hotkey_radio_sw");
1809 }
1810
1811 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1812 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1813                            struct device_attribute *attr,
1814                            char *buf)
1815 {
1816         int res, s;
1817         res = hotkey_get_tablet_mode(&s);
1818         if (res < 0)
1819                 return res;
1820
1821         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1822 }
1823
1824 static struct device_attribute dev_attr_hotkey_tablet_mode =
1825         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1826
1827 static void hotkey_tablet_mode_notify_change(void)
1828 {
1829         if (tp_features.hotkey_tablet)
1830                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1831                              "hotkey_tablet_mode");
1832 }
1833
1834 /* sysfs hotkey report_mode -------------------------------------------- */
1835 static ssize_t hotkey_report_mode_show(struct device *dev,
1836                            struct device_attribute *attr,
1837                            char *buf)
1838 {
1839         return snprintf(buf, PAGE_SIZE, "%d\n",
1840                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1841 }
1842
1843 static struct device_attribute dev_attr_hotkey_report_mode =
1844         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1845
1846 /* sysfs wakeup reason (pollable) -------------------------------------- */
1847 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1848                            struct device_attribute *attr,
1849                            char *buf)
1850 {
1851         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1852 }
1853
1854 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1855         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1856
1857 static void hotkey_wakeup_reason_notify_change(void)
1858 {
1859         if (tp_features.hotkey_mask)
1860                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1861                              "wakeup_reason");
1862 }
1863
1864 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1865 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1866                            struct device_attribute *attr,
1867                            char *buf)
1868 {
1869         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1870 }
1871
1872 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1873         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1874                hotkey_wakeup_hotunplug_complete_show, NULL);
1875
1876 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1877 {
1878         if (tp_features.hotkey_mask)
1879                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1880                              "wakeup_hotunplug_complete");
1881 }
1882
1883 /* --------------------------------------------------------------------- */
1884
1885 static struct attribute *hotkey_attributes[] __initdata = {
1886         &dev_attr_hotkey_enable.attr,
1887         &dev_attr_hotkey_bios_enabled.attr,
1888         &dev_attr_hotkey_report_mode.attr,
1889 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1890         &dev_attr_hotkey_mask.attr,
1891         &dev_attr_hotkey_all_mask.attr,
1892         &dev_attr_hotkey_recommended_mask.attr,
1893         &dev_attr_hotkey_source_mask.attr,
1894         &dev_attr_hotkey_poll_freq.attr,
1895 #endif
1896 };
1897
1898 static struct attribute *hotkey_mask_attributes[] __initdata = {
1899         &dev_attr_hotkey_bios_mask.attr,
1900 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1901         &dev_attr_hotkey_mask.attr,
1902         &dev_attr_hotkey_all_mask.attr,
1903         &dev_attr_hotkey_recommended_mask.attr,
1904 #endif
1905         &dev_attr_hotkey_wakeup_reason.attr,
1906         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1907 };
1908
1909 static void tpacpi_send_radiosw_update(void)
1910 {
1911         int wlsw;
1912
1913         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1914                 mutex_lock(&tpacpi_inputdev_send_mutex);
1915
1916                 input_report_switch(tpacpi_inputdev,
1917                                     SW_RFKILL_ALL, !!wlsw);
1918                 input_sync(tpacpi_inputdev);
1919
1920                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1921         }
1922         hotkey_radio_sw_notify_change();
1923 }
1924
1925 static void hotkey_exit(void)
1926 {
1927 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1928         hotkey_poll_stop_sync();
1929 #endif
1930
1931         if (hotkey_dev_attributes)
1932                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
1933
1934         kfree(hotkey_keycode_map);
1935
1936         if (tp_features.hotkey) {
1937                 dbg_printk(TPACPI_DBG_EXIT,
1938                            "restoring original hot key mask\n");
1939                 /* no short-circuit boolean operator below! */
1940                 if ((hotkey_mask_set(hotkey_orig_mask) |
1941                      hotkey_status_set(hotkey_orig_status)) != 0)
1942                         printk(TPACPI_ERR
1943                                "failed to restore hot key mask "
1944                                "to BIOS defaults\n");
1945         }
1946 }
1947
1948 static int __init hotkey_init(struct ibm_init_struct *iibm)
1949 {
1950         /* Requirements for changing the default keymaps:
1951          *
1952          * 1. Many of the keys are mapped to KEY_RESERVED for very
1953          *    good reasons.  Do not change them unless you have deep
1954          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1955          *    the various ThinkPad models.  The driver behaves
1956          *    differently for KEY_RESERVED: such keys have their
1957          *    hot key mask *unset* in mask_recommended, and also
1958          *    in the initial hot key mask programmed into the
1959          *    firmware at driver load time, which means the firm-
1960          *    ware may react very differently if you change them to
1961          *    something else;
1962          *
1963          * 2. You must be subscribed to the linux-thinkpad and
1964          *    ibm-acpi-devel mailing lists, and you should read the
1965          *    list archives since 2007 if you want to change the
1966          *    keymaps.  This requirement exists so that you will
1967          *    know the past history of problems with the thinkpad-
1968          *    acpi driver keymaps, and also that you will be
1969          *    listening to any bug reports;
1970          *
1971          * 3. Do not send thinkpad-acpi specific patches directly to
1972          *    for merging, *ever*.  Send them to the linux-acpi
1973          *    mailinglist for comments.  Merging is to be done only
1974          *    through acpi-test and the ACPI maintainer.
1975          *
1976          * If the above is too much to ask, don't change the keymap.
1977          * Ask the thinkpad-acpi maintainer to do it, instead.
1978          */
1979         static u16 ibm_keycode_map[] __initdata = {
1980                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1981                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1982                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1983                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1984
1985                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1986                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1987                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1988                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1989
1990                 /* brightness: firmware always reacts to them, unless
1991                  * X.org did some tricks in the radeon BIOS scratch
1992                  * registers of *some* models */
1993                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1994                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1995
1996                 /* Thinklight: firmware always react to it */
1997                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1998
1999                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2000                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2001
2002                 /* Volume: firmware always react to it and reprograms
2003                  * the built-in *extra* mixer.  Never map it to control
2004                  * another mixer by default. */
2005                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2006                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2007                 KEY_RESERVED,   /* 0x16: MUTE */
2008
2009                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2010
2011                 /* (assignments unknown, please report if found) */
2012                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2013                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2014         };
2015         static u16 lenovo_keycode_map[] __initdata = {
2016                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
2017                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
2018                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
2019                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
2020
2021                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
2022                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
2023                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
2024                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
2025
2026                 /* These either have to go through ACPI video, or
2027                  * act like in the IBM ThinkPads, so don't ever
2028                  * enable them by default */
2029                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2030                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2031
2032                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2033
2034                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2035                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2036
2037                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2038                  * react to it and reprograms the built-in *extra* mixer.
2039                  * Never map it to control another mixer by default.
2040                  *
2041                  * T60?, T61, R60?, R61: firmware and EC tries to send
2042                  * these over the regular keyboard, so these are no-ops,
2043                  * but there are still weird bugs re. MUTE, so do not
2044                  * change unless you get test reports from all Lenovo
2045                  * models.  May cause the BIOS to interfere with the
2046                  * HDA mixer.
2047                  */
2048                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2049                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2050                 KEY_RESERVED,   /* 0x16: MUTE */
2051
2052                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2053
2054                 /* (assignments unknown, please report if found) */
2055                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2056                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2057         };
2058
2059 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2060 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2061 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2062
2063         int res, i;
2064         int status;
2065         int hkeyv;
2066
2067         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2068
2069         BUG_ON(!tpacpi_inputdev);
2070         BUG_ON(tpacpi_inputdev->open != NULL ||
2071                tpacpi_inputdev->close != NULL);
2072
2073         TPACPI_ACPIHANDLE_INIT(hkey);
2074         mutex_init(&hotkey_mutex);
2075
2076 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2077         mutex_init(&hotkey_thread_mutex);
2078         mutex_init(&hotkey_thread_data_mutex);
2079 #endif
2080
2081         /* hotkey not supported on 570 */
2082         tp_features.hotkey = hkey_handle != NULL;
2083
2084         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2085                 str_supported(tp_features.hotkey));
2086
2087         if (!tp_features.hotkey)
2088                 return 1;
2089
2090         hotkey_dev_attributes = create_attr_set(13, NULL);
2091         if (!hotkey_dev_attributes)
2092                 return -ENOMEM;
2093         res = add_many_to_attr_set(hotkey_dev_attributes,
2094                         hotkey_attributes,
2095                         ARRAY_SIZE(hotkey_attributes));
2096         if (res)
2097                 goto err_exit;
2098
2099         /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2100            A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2101            for HKEY interface version 0x100 */
2102         if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2103                 if ((hkeyv >> 8) != 1) {
2104                         printk(TPACPI_ERR "unknown version of the "
2105                                "HKEY interface: 0x%x\n", hkeyv);
2106                         printk(TPACPI_ERR "please report this to %s\n",
2107                                TPACPI_MAIL);
2108                 } else {
2109                         /*
2110                          * MHKV 0x100 in A31, R40, R40e,
2111                          * T4x, X31, and later
2112                          */
2113                         tp_features.hotkey_mask = 1;
2114                 }
2115         }
2116
2117         vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2118                 str_supported(tp_features.hotkey_mask));
2119
2120         if (tp_features.hotkey_mask) {
2121                 if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2122                                 "MHKA", "qd")) {
2123                         printk(TPACPI_ERR
2124                                "missing MHKA handler, "
2125                                "please report this to %s\n",
2126                                TPACPI_MAIL);
2127                         /* FN+F12, FN+F4, FN+F3 */
2128                         hotkey_all_mask = 0x080cU;
2129                 }
2130         }
2131
2132         /* hotkey_source_mask *must* be zero for
2133          * the first hotkey_mask_get */
2134         res = hotkey_status_get(&hotkey_orig_status);
2135         if (res)
2136                 goto err_exit;
2137
2138         if (tp_features.hotkey_mask) {
2139                 res = hotkey_mask_get();
2140                 if (res)
2141                         goto err_exit;
2142
2143                 hotkey_orig_mask = hotkey_mask;
2144                 res = add_many_to_attr_set(
2145                                 hotkey_dev_attributes,
2146                                 hotkey_mask_attributes,
2147                                 ARRAY_SIZE(hotkey_mask_attributes));
2148                 if (res)
2149                         goto err_exit;
2150         }
2151
2152 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2153         if (tp_features.hotkey_mask) {
2154                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2155                                         & ~hotkey_all_mask;
2156         } else {
2157                 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2158         }
2159
2160         vdbg_printk(TPACPI_DBG_INIT,
2161                     "hotkey source mask 0x%08x, polling freq %d\n",
2162                     hotkey_source_mask, hotkey_poll_freq);
2163 #endif
2164
2165         /* Not all thinkpads have a hardware radio switch */
2166         if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2167                 tp_features.hotkey_wlsw = 1;
2168                 printk(TPACPI_INFO
2169                         "radio switch found; radios are %s\n",
2170                         enabled(status, 0));
2171         }
2172         if (tp_features.hotkey_wlsw)
2173                 res = add_to_attr_set(hotkey_dev_attributes,
2174                                 &dev_attr_hotkey_radio_sw.attr);
2175
2176         /* For X41t, X60t, X61t Tablets... */
2177         if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2178                 tp_features.hotkey_tablet = 1;
2179                 printk(TPACPI_INFO
2180                         "possible tablet mode switch found; "
2181                         "ThinkPad in %s mode\n",
2182                         (status & TP_HOTKEY_TABLET_MASK)?
2183                                 "tablet" : "laptop");
2184                 res = add_to_attr_set(hotkey_dev_attributes,
2185                                 &dev_attr_hotkey_tablet_mode.attr);
2186         }
2187
2188         if (!res)
2189                 res = register_attr_set_with_sysfs(
2190                                 hotkey_dev_attributes,
2191                                 &tpacpi_pdev->dev.kobj);
2192         if (res)
2193                 goto err_exit;
2194
2195         /* Set up key map */
2196
2197         hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2198                                         GFP_KERNEL);
2199         if (!hotkey_keycode_map) {
2200                 printk(TPACPI_ERR
2201                         "failed to allocate memory for key map\n");
2202                 res = -ENOMEM;
2203                 goto err_exit;
2204         }
2205
2206         if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2207                 dbg_printk(TPACPI_DBG_INIT,
2208                            "using Lenovo default hot key map\n");
2209                 memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2210                         TPACPI_HOTKEY_MAP_SIZE);
2211         } else {
2212                 dbg_printk(TPACPI_DBG_INIT,
2213                            "using IBM default hot key map\n");
2214                 memcpy(hotkey_keycode_map, &ibm_keycode_map,
2215                         TPACPI_HOTKEY_MAP_SIZE);
2216         }
2217
2218         set_bit(EV_KEY, tpacpi_inputdev->evbit);
2219         set_bit(EV_MSC, tpacpi_inputdev->evbit);
2220         set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2221         tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2222         tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2223         tpacpi_inputdev->keycode = hotkey_keycode_map;
2224         for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2225                 if (hotkey_keycode_map[i] != KEY_RESERVED) {
2226                         set_bit(hotkey_keycode_map[i],
2227                                 tpacpi_inputdev->keybit);
2228                 } else {
2229                         if (i < sizeof(hotkey_reserved_mask)*8)
2230                                 hotkey_reserved_mask |= 1 << i;
2231                 }
2232         }
2233
2234         if (tp_features.hotkey_wlsw) {
2235                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2236                 set_bit(SW_RFKILL_ALL, tpacpi_inputdev->swbit);
2237         }
2238         if (tp_features.hotkey_tablet) {
2239                 set_bit(EV_SW, tpacpi_inputdev->evbit);
2240                 set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2241         }
2242
2243         /* Do not issue duplicate brightness change events to
2244          * userspace */
2245         if (!tp_features.bright_acpimode)
2246                 /* update bright_acpimode... */
2247                 tpacpi_check_std_acpi_brightness_support();
2248
2249         if (tp_features.bright_acpimode) {
2250                 printk(TPACPI_INFO
2251                        "This ThinkPad has standard ACPI backlight "
2252                        "brightness control, supported by the ACPI "
2253                        "video driver\n");
2254                 printk(TPACPI_NOTICE
2255                        "Disabling thinkpad-acpi brightness events "
2256                        "by default...\n");
2257
2258                 /* The hotkey_reserved_mask change below is not
2259                  * necessary while the keys are at KEY_RESERVED in the
2260                  * default map, but better safe than sorry, leave it
2261                  * here as a marker of what we have to do, especially
2262                  * when we finally become able to set this at runtime
2263                  * on response to X.org requests */
2264                 hotkey_reserved_mask |=
2265                         (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2266                         | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2267         }
2268
2269         dbg_printk(TPACPI_DBG_INIT, "enabling hot key handling\n");
2270         res = hotkey_status_set(1);
2271         if (res) {
2272                 hotkey_exit();
2273                 return res;
2274         }
2275         res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2276                                 & ~hotkey_reserved_mask)
2277                                 | hotkey_orig_mask);
2278         if (res < 0 && res != -ENXIO) {
2279                 hotkey_exit();
2280                 return res;
2281         }
2282
2283         dbg_printk(TPACPI_DBG_INIT,
2284                         "legacy hot key reporting over procfs %s\n",
2285                         (hotkey_report_mode < 2) ?
2286                                 "enabled" : "disabled");
2287
2288         tpacpi_inputdev->open = &hotkey_inputdev_open;
2289         tpacpi_inputdev->close = &hotkey_inputdev_close;
2290
2291         hotkey_poll_setup_safe(1);
2292         tpacpi_send_radiosw_update();
2293         tpacpi_input_send_tabletsw();
2294
2295         return 0;
2296
2297 err_exit:
2298         delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2299         hotkey_dev_attributes = NULL;
2300
2301         return (res < 0)? res : 1;
2302 }
2303
2304 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2305 {
2306         u32 hkey;
2307         unsigned int scancode;
2308         int send_acpi_ev;
2309         int ignore_acpi_ev;
2310         int unk_ev;
2311
2312         if (event != 0x80) {
2313                 printk(TPACPI_ERR
2314                        "unknown HKEY notification event %d\n", event);
2315                 /* forward it to userspace, maybe it knows how to handle it */
2316                 acpi_bus_generate_netlink_event(
2317                                         ibm->acpi->device->pnp.device_class,
2318                                         ibm->acpi->device->dev.bus_id,
2319                                         event, 0);
2320                 return;
2321         }
2322
2323         while (1) {
2324                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2325                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2326                         return;
2327                 }
2328
2329                 if (hkey == 0) {
2330                         /* queue empty */
2331                         return;
2332                 }
2333
2334                 send_acpi_ev = 1;
2335                 ignore_acpi_ev = 0;
2336                 unk_ev = 0;
2337
2338                 switch (hkey >> 12) {
2339                 case 1:
2340                         /* 0x1000-0x1FFF: key presses */
2341                         scancode = hkey & 0xfff;
2342                         if (scancode > 0 && scancode < 0x21) {
2343                                 scancode--;
2344                                 if (!(hotkey_source_mask & (1 << scancode))) {
2345                                         tpacpi_input_send_key(scancode);
2346                                         send_acpi_ev = 0;
2347                                 } else {
2348                                         ignore_acpi_ev = 1;
2349                                 }
2350                         } else {
2351                                 unk_ev = 1;
2352                         }
2353                         break;
2354                 case 2:
2355                         /* Wakeup reason */
2356                         switch (hkey) {
2357                         case 0x2304: /* suspend, undock */
2358                         case 0x2404: /* hibernation, undock */
2359                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2360                                 ignore_acpi_ev = 1;
2361                                 break;
2362                         case 0x2305: /* suspend, bay eject */
2363                         case 0x2405: /* hibernation, bay eject */
2364                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2365                                 ignore_acpi_ev = 1;
2366                                 break;
2367                         default:
2368                                 unk_ev = 1;
2369                         }
2370                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2371                                 printk(TPACPI_INFO
2372                                        "woke up due to a hot-unplug "
2373                                        "request...\n");
2374                                 hotkey_wakeup_reason_notify_change();
2375                         }
2376                         break;
2377                 case 3:
2378                         /* bay-related wakeups */
2379                         if (hkey == 0x3003) {
2380                                 hotkey_autosleep_ack = 1;
2381                                 printk(TPACPI_INFO
2382                                        "bay ejected\n");
2383                                 hotkey_wakeup_hotunplug_complete_notify_change();
2384                         } else {
2385                                 unk_ev = 1;
2386                         }
2387                         break;
2388                 case 4:
2389                         /* dock-related wakeups */
2390                         if (hkey == 0x4003) {
2391                                 hotkey_autosleep_ack = 1;
2392                                 printk(TPACPI_INFO
2393                                        "undocked\n");
2394                                 hotkey_wakeup_hotunplug_complete_notify_change();
2395                         } else {
2396                                 unk_ev = 1;
2397                         }
2398                         break;
2399                 case 5:
2400                         /* 0x5000-0x5FFF: human interface helpers */
2401                         switch (hkey) {
2402                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2403                         case 0x500b: /* X61t: tablet pen inserted into bay */
2404                         case 0x500c: /* X61t: tablet pen removed from bay */
2405                                 break;
2406                         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2407                         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2408                                 tpacpi_input_send_tabletsw();
2409                                 hotkey_tablet_mode_notify_change();
2410                                 send_acpi_ev = 0;
2411                                 break;
2412                         case 0x5001:
2413                         case 0x5002:
2414                                 /* LID switch events.  Do not propagate */
2415                                 ignore_acpi_ev = 1;
2416                                 break;
2417                         default:
2418                                 unk_ev = 1;
2419                         }
2420                         break;
2421                 case 7:
2422                         /* 0x7000-0x7FFF: misc */
2423                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2424                                 tpacpi_send_radiosw_update();
2425                                 send_acpi_ev = 0;
2426                                 break;
2427                         }
2428                         /* fallthrough to default */
2429                 default:
2430                         unk_ev = 1;
2431                 }
2432                 if (unk_ev) {
2433                         printk(TPACPI_NOTICE
2434                                "unhandled HKEY event 0x%04x\n", hkey);
2435                 }
2436
2437                 /* Legacy events */
2438                 if (!ignore_acpi_ev &&
2439                     (send_acpi_ev || hotkey_report_mode < 2)) {
2440                         acpi_bus_generate_proc_event(ibm->acpi->device,
2441                                                      event, hkey);
2442                 }
2443
2444                 /* netlink events */
2445                 if (!ignore_acpi_ev && send_acpi_ev) {
2446                         acpi_bus_generate_netlink_event(
2447                                         ibm->acpi->device->pnp.device_class,
2448                                         ibm->acpi->device->dev.bus_id,
2449                                         event, hkey);
2450                 }
2451         }
2452 }
2453
2454 static void hotkey_suspend(pm_message_t state)
2455 {
2456         /* Do these on suspend, we get the events on early resume! */
2457         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2458         hotkey_autosleep_ack = 0;
2459 }
2460
2461 static void hotkey_resume(void)
2462 {
2463         if (hotkey_mask_get())
2464                 printk(TPACPI_ERR
2465                        "error while trying to read hot key mask "
2466                        "from firmware\n");
2467         tpacpi_send_radiosw_update();
2468         hotkey_tablet_mode_notify_change();
2469         hotkey_wakeup_reason_notify_change();
2470         hotkey_wakeup_hotunplug_complete_notify_change();
2471         hotkey_poll_setup_safe(0);
2472 }
2473
2474 /* procfs -------------------------------------------------------------- */
2475 static int hotkey_read(char *p)
2476 {
2477         int res, status;
2478         int len = 0;
2479
2480         if (!tp_features.hotkey) {
2481                 len += sprintf(p + len, "status:\t\tnot supported\n");
2482                 return len;
2483         }
2484
2485         if (mutex_lock_interruptible(&hotkey_mutex))
2486                 return -ERESTARTSYS;
2487         res = hotkey_status_get(&status);
2488         if (!res)
2489                 res = hotkey_mask_get();
2490         mutex_unlock(&hotkey_mutex);
2491         if (res)
2492                 return res;
2493
2494         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2495         if (tp_features.hotkey_mask) {
2496                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2497                 len += sprintf(p + len,
2498                                "commands:\tenable, disable, reset, <mask>\n");
2499         } else {
2500                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2501                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2502         }
2503
2504         return len;
2505 }
2506
2507 static int hotkey_write(char *buf)
2508 {
2509         int res, status;
2510         u32 mask;
2511         char *cmd;
2512
2513         if (!tp_features.hotkey)
2514                 return -ENODEV;
2515
2516         if (mutex_lock_interruptible(&hotkey_mutex))
2517                 return -ERESTARTSYS;
2518
2519         status = -1;
2520         mask = hotkey_mask;
2521
2522         res = 0;
2523         while ((cmd = next_cmd(&buf))) {
2524                 if (strlencmp(cmd, "enable") == 0) {
2525                         status = 1;
2526                 } else if (strlencmp(cmd, "disable") == 0) {
2527                         status = 0;
2528                 } else if (strlencmp(cmd, "reset") == 0) {
2529                         status = hotkey_orig_status;
2530                         mask = hotkey_orig_mask;
2531                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2532                         /* mask set */
2533                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2534                         /* mask set */
2535                 } else {
2536                         res = -EINVAL;
2537                         goto errexit;
2538                 }
2539         }
2540         if (status != -1)
2541                 res = hotkey_status_set(status);
2542
2543         if (!res && mask != hotkey_mask)
2544                 res = hotkey_mask_set(mask);
2545
2546 errexit:
2547         mutex_unlock(&hotkey_mutex);
2548         return res;
2549 }
2550
2551 static const struct acpi_device_id ibm_htk_device_ids[] = {
2552         {TPACPI_ACPI_HKEY_HID, 0},
2553         {"", 0},
2554 };
2555
2556 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2557         .hid = ibm_htk_device_ids,
2558         .notify = hotkey_notify,
2559         .handle = &hkey_handle,
2560         .type = ACPI_DEVICE_NOTIFY,
2561 };
2562
2563 static struct ibm_struct hotkey_driver_data = {
2564         .name = "hotkey",
2565         .read = hotkey_read,
2566         .write = hotkey_write,
2567         .exit = hotkey_exit,
2568         .resume = hotkey_resume,
2569         .suspend = hotkey_suspend,
2570         .acpi = &ibm_hotkey_acpidriver,
2571 };
2572
2573 /*************************************************************************
2574  * Bluetooth subdriver
2575  */
2576
2577 enum {
2578         /* ACPI GBDC/SBDC bits */
2579         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2580         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2581         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2582 };
2583
2584 static int bluetooth_get_radiosw(void)
2585 {
2586         int status;
2587
2588         if (!tp_features.bluetooth)
2589                 return -ENODEV;
2590
2591         /* WLSW overrides bluetooth in firmware/hardware, reflect that */
2592         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2593                 return 0;
2594
2595         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2596                 return -EIO;
2597
2598         return (status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0;
2599 }
2600
2601 static int bluetooth_set_radiosw(int radio_on)
2602 {
2603         int status;
2604
2605         if (!tp_features.bluetooth)
2606                 return -ENODEV;
2607
2608         /* WLSW overrides bluetooth in firmware/hardware, but there is no
2609          * reason to risk weird behaviour. */
2610         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
2611             && radio_on)
2612                 return -EPERM;
2613
2614         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2615                 return -EIO;
2616         if (radio_on)
2617                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2618         else
2619                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2620         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2621                 return -EIO;
2622
2623         return 0;
2624 }
2625
2626 /* sysfs bluetooth enable ---------------------------------------------- */
2627 static ssize_t bluetooth_enable_show(struct device *dev,
2628                            struct device_attribute *attr,
2629                            char *buf)
2630 {
2631         int status;
2632
2633         status = bluetooth_get_radiosw();
2634         if (status < 0)
2635                 return status;
2636
2637         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2638 }
2639
2640 static ssize_t bluetooth_enable_store(struct device *dev,
2641                             struct device_attribute *attr,
2642                             const char *buf, size_t count)
2643 {
2644         unsigned long t;
2645         int res;
2646
2647         if (parse_strtoul(buf, 1, &t))
2648                 return -EINVAL;
2649
2650         res = bluetooth_set_radiosw(t);
2651
2652         return (res) ? res : count;
2653 }
2654
2655 static struct device_attribute dev_attr_bluetooth_enable =
2656         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2657                 bluetooth_enable_show, bluetooth_enable_store);
2658
2659 /* --------------------------------------------------------------------- */
2660
2661 static struct attribute *bluetooth_attributes[] = {
2662         &dev_attr_bluetooth_enable.attr,
2663         NULL
2664 };
2665
2666 static const struct attribute_group bluetooth_attr_group = {
2667         .attrs = bluetooth_attributes,
2668 };
2669
2670 static void bluetooth_exit(void)
2671 {
2672         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2673                         &bluetooth_attr_group);
2674 }
2675
2676 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2677 {
2678         int res;
2679         int status = 0;
2680
2681         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2682
2683         TPACPI_ACPIHANDLE_INIT(hkey);
2684
2685         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2686            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2687         tp_features.bluetooth = hkey_handle &&
2688             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2689
2690         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2691                 str_supported(tp_features.bluetooth),
2692                 status);
2693
2694         if (tp_features.bluetooth &&
2695             !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2696                 /* no bluetooth hardware present in system */
2697                 tp_features.bluetooth = 0;
2698                 dbg_printk(TPACPI_DBG_INIT,
2699                            "bluetooth hardware not installed\n");
2700         }
2701
2702         if (tp_features.bluetooth) {
2703                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2704                                 &bluetooth_attr_group);
2705                 if (res)
2706                         return res;
2707         }
2708
2709         return (tp_features.bluetooth)? 0 : 1;
2710 }
2711
2712 /* procfs -------------------------------------------------------------- */
2713 static int bluetooth_read(char *p)
2714 {
2715         int len = 0;
2716         int status = bluetooth_get_radiosw();
2717
2718         if (!tp_features.bluetooth)
2719                 len += sprintf(p + len, "status:\t\tnot supported\n");
2720         else {
2721                 len += sprintf(p + len, "status:\t\t%s\n",
2722                                 (status)? "enabled" : "disabled");
2723                 len += sprintf(p + len, "commands:\tenable, disable\n");
2724         }
2725
2726         return len;
2727 }
2728
2729 static int bluetooth_write(char *buf)
2730 {
2731         char *cmd;
2732
2733         if (!tp_features.bluetooth)
2734                 return -ENODEV;
2735
2736         while ((cmd = next_cmd(&buf))) {
2737                 if (strlencmp(cmd, "enable") == 0) {
2738                         bluetooth_set_radiosw(1);
2739                 } else if (strlencmp(cmd, "disable") == 0) {
2740                         bluetooth_set_radiosw(0);
2741                 } else
2742                         return -EINVAL;
2743         }
2744
2745         return 0;
2746 }
2747
2748 static struct ibm_struct bluetooth_driver_data = {
2749         .name = "bluetooth",
2750         .read = bluetooth_read,
2751         .write = bluetooth_write,
2752         .exit = bluetooth_exit,
2753 };
2754
2755 /*************************************************************************
2756  * Wan subdriver
2757  */
2758
2759 enum {
2760         /* ACPI GWAN/SWAN bits */
2761         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2762         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2763         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2764 };
2765
2766 static int wan_get_radiosw(void)
2767 {
2768         int status;
2769
2770         if (!tp_features.wan)
2771                 return -ENODEV;
2772
2773         /* WLSW overrides WWAN in firmware/hardware, reflect that */
2774         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status)
2775                 return 0;
2776
2777         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2778                 return -EIO;
2779
2780         return (status & TP_ACPI_WANCARD_RADIOSSW) != 0;
2781 }
2782
2783 static int wan_set_radiosw(int radio_on)
2784 {
2785         int status;
2786
2787         if (!tp_features.wan)
2788                 return -ENODEV;
2789
2790         /* WLSW overrides bluetooth in firmware/hardware, but there is no
2791          * reason to risk weird behaviour. */
2792         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&status) && !status
2793             && radio_on)
2794                 return -EPERM;
2795
2796         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2797                 return -EIO;
2798         if (radio_on)
2799                 status |= TP_ACPI_WANCARD_RADIOSSW;
2800         else
2801                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2802         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2803                 return -EIO;
2804
2805         return 0;
2806 }
2807
2808 /* sysfs wan enable ---------------------------------------------------- */
2809 static ssize_t wan_enable_show(struct device *dev,
2810                            struct device_attribute *attr,
2811                            char *buf)
2812 {
2813         int status;
2814
2815         status = wan_get_radiosw();
2816         if (status < 0)
2817                 return status;
2818
2819         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2820 }
2821
2822 static ssize_t wan_enable_store(struct device *dev,
2823                             struct device_attribute *attr,
2824                             const char *buf, size_t count)
2825 {
2826         unsigned long t;
2827         int res;
2828
2829         if (parse_strtoul(buf, 1, &t))
2830                 return -EINVAL;
2831
2832         res = wan_set_radiosw(t);
2833
2834         return (res) ? res : count;
2835 }
2836
2837 static struct device_attribute dev_attr_wan_enable =
2838         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2839                 wan_enable_show, wan_enable_store);
2840
2841 /* --------------------------------------------------------------------- */
2842
2843 static struct attribute *wan_attributes[] = {
2844         &dev_attr_wan_enable.attr,
2845         NULL
2846 };
2847
2848 static const struct attribute_group wan_attr_group = {
2849         .attrs = wan_attributes,
2850 };
2851
2852 static void wan_exit(void)
2853 {
2854         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2855                 &wan_attr_group);
2856 }
2857
2858 static int __init wan_init(struct ibm_init_struct *iibm)
2859 {
2860         int res;
2861         int status = 0;
2862
2863         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2864
2865         TPACPI_ACPIHANDLE_INIT(hkey);
2866
2867         tp_features.wan = hkey_handle &&
2868             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2869
2870         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2871                 str_supported(tp_features.wan),
2872                 status);
2873
2874         if (tp_features.wan &&
2875             !(status & TP_ACPI_WANCARD_HWPRESENT)) {
2876                 /* no wan hardware present in system */
2877                 tp_features.wan = 0;
2878                 dbg_printk(TPACPI_DBG_INIT,
2879                            "wan hardware not installed\n");
2880         }
2881
2882         if (tp_features.wan) {
2883                 res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2884                                 &wan_attr_group);
2885                 if (res)
2886                         return res;
2887         }
2888
2889         return (tp_features.wan)? 0 : 1;
2890 }
2891
2892 /* procfs -------------------------------------------------------------- */
2893 static int wan_read(char *p)
2894 {
2895         int len = 0;
2896         int status = wan_get_radiosw();
2897
2898         if (!tp_features.wan)
2899                 len += sprintf(p + len, "status:\t\tnot supported\n");
2900         else {
2901                 len += sprintf(p + len, "status:\t\t%s\n",
2902                                 (status)? "enabled" : "disabled");
2903                 len += sprintf(p + len, "commands:\tenable, disable\n");
2904         }
2905
2906         return len;
2907 }
2908
2909 static int wan_write(char *buf)
2910 {
2911         char *cmd;
2912
2913         if (!tp_features.wan)
2914                 return -ENODEV;
2915
2916         while ((cmd = next_cmd(&buf))) {
2917                 if (strlencmp(cmd, "enable") == 0) {
2918                         wan_set_radiosw(1);
2919                 } else if (strlencmp(cmd, "disable") == 0) {
2920                         wan_set_radiosw(0);
2921                 } else
2922                         return -EINVAL;
2923         }
2924
2925         return 0;
2926 }
2927
2928 static struct ibm_struct wan_driver_data = {
2929         .name = "wan",
2930         .read = wan_read,
2931         .write = wan_write,
2932         .exit = wan_exit,
2933         .flags.experimental = 1,
2934 };
2935
2936 /*************************************************************************
2937  * Video subdriver
2938  */
2939
2940 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2941
2942 enum video_access_mode {
2943         TPACPI_VIDEO_NONE = 0,
2944         TPACPI_VIDEO_570,       /* 570 */
2945         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2946         TPACPI_VIDEO_NEW,       /* all others */
2947 };
2948
2949 enum {  /* video status flags, based on VIDEO_570 */
2950         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2951         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2952         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2953 };
2954
2955 enum {  /* TPACPI_VIDEO_570 constants */
2956         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2957         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2958                                                  * video_status_flags */
2959         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2960         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2961 };
2962
2963 static enum video_access_mode video_supported;
2964 static int video_orig_autosw;
2965
2966 static int video_autosw_get(void);
2967 static int video_autosw_set(int enable);
2968
2969 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2970
2971 static int __init video_init(struct ibm_init_struct *iibm)
2972 {
2973         int ivga;
2974
2975         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2976
2977         TPACPI_ACPIHANDLE_INIT(vid);
2978         TPACPI_ACPIHANDLE_INIT(vid2);
2979
2980         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2981                 /* G41, assume IVGA doesn't change */
2982                 vid_handle = vid2_handle;
2983
2984         if (!vid_handle)
2985                 /* video switching not supported on R30, R31 */
2986                 video_supported = TPACPI_VIDEO_NONE;
2987         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2988                 /* 570 */
2989                 video_supported = TPACPI_VIDEO_570;
2990         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2991                 /* 600e/x, 770e, 770x */
2992                 video_supported = TPACPI_VIDEO_770;
2993         else
2994                 /* all others */
2995                 video_supported = TPACPI_VIDEO_NEW;
2996
2997         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2998                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2999                 video_supported);
3000
3001         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
3002 }
3003
3004 static void video_exit(void)
3005 {
3006         dbg_printk(TPACPI_DBG_EXIT,
3007                    "restoring original video autoswitch mode\n");
3008         if (video_autosw_set(video_orig_autosw))
3009                 printk(TPACPI_ERR "error while trying to restore original "
3010                         "video autoswitch mode\n");
3011 }
3012
3013 static int video_outputsw_get(void)
3014 {
3015         int status = 0;
3016         int i;
3017
3018         switch (video_supported) {
3019         case TPACPI_VIDEO_570:
3020                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
3021                                  TP_ACPI_VIDEO_570_PHSCMD))
3022                         return -EIO;
3023                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
3024                 break;
3025         case TPACPI_VIDEO_770:
3026                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
3027                         return -EIO;
3028                 if (i)
3029                         status |= TP_ACPI_VIDEO_S_LCD;
3030                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
3031                         return -EIO;
3032                 if (i)
3033                         status |= TP_ACPI_VIDEO_S_CRT;
3034                 break;
3035         case TPACPI_VIDEO_NEW:
3036                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3037                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3038                         return -EIO;
3039                 if (i)
3040                         status |= TP_ACPI_VIDEO_S_CRT;
3041
3042                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3043                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3044                         return -EIO;
3045                 if (i)
3046                         status |= TP_ACPI_VIDEO_S_LCD;
3047                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3048                         return -EIO;
3049                 if (i)
3050                         status |= TP_ACPI_VIDEO_S_DVI;
3051                 break;
3052         default:
3053                 return -ENOSYS;
3054         }
3055
3056         return status;
3057 }
3058
3059 static int video_outputsw_set(int status)
3060 {
3061         int autosw;
3062         int res = 0;
3063
3064         switch (video_supported) {
3065         case TPACPI_VIDEO_570:
3066                 res = acpi_evalf(NULL, NULL,
3067                                  "\\_SB.PHS2", "vdd",
3068                                  TP_ACPI_VIDEO_570_PHS2CMD,
3069                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3070                 break;
3071         case TPACPI_VIDEO_770:
3072                 autosw = video_autosw_get();
3073                 if (autosw < 0)
3074                         return autosw;
3075
3076                 res = video_autosw_set(1);
3077                 if (res)
3078                         return res;
3079                 res = acpi_evalf(vid_handle, NULL,
3080                                  "ASWT", "vdd", status * 0x100, 0);
3081                 if (!autosw && video_autosw_set(autosw)) {
3082                         printk(TPACPI_ERR
3083                                "video auto-switch left enabled due to error\n");
3084                         return -EIO;
3085                 }
3086                 break;
3087         case TPACPI_VIDEO_NEW:
3088                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3089                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3090                 break;
3091         default:
3092                 return -ENOSYS;
3093         }
3094
3095         return (res)? 0 : -EIO;
3096 }
3097
3098 static int video_autosw_get(void)
3099 {
3100         int autosw = 0;
3101
3102         switch (video_supported) {
3103         case TPACPI_VIDEO_570:
3104                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3105                         return -EIO;
3106                 break;
3107         case TPACPI_VIDEO_770:
3108         case TPACPI_VIDEO_NEW:
3109                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3110                         return -EIO;
3111                 break;
3112         default:
3113                 return -ENOSYS;
3114         }
3115
3116         return autosw & 1;
3117 }
3118
3119 static int video_autosw_set(int enable)
3120 {
3121         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3122                 return -EIO;
3123         return 0;
3124 }
3125
3126 static int video_outputsw_cycle(void)
3127 {
3128         int autosw = video_autosw_get();
3129         int res;
3130
3131         if (autosw < 0)
3132                 return autosw;
3133
3134         switch (video_supported) {
3135         case TPACPI_VIDEO_570:
3136                 res = video_autosw_set(1);
3137                 if (res)
3138                         return res;
3139                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3140                 break;
3141         case TPACPI_VIDEO_770:
3142         case TPACPI_VIDEO_NEW:
3143                 res = video_autosw_set(1);
3144                 if (res)
3145                         return res;
3146                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3147                 break;
3148         default:
3149                 return -ENOSYS;
3150         }
3151         if (!autosw && video_autosw_set(autosw)) {
3152                 printk(TPACPI_ERR
3153                        "video auto-switch left enabled due to error\n");
3154                 return -EIO;
3155         }
3156
3157         return (res)? 0 : -EIO;
3158 }
3159
3160 static int video_expand_toggle(void)
3161 {
3162         switch (video_supported) {
3163         case TPACPI_VIDEO_570:
3164                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3165                         0 : -EIO;
3166         case TPACPI_VIDEO_770:
3167                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3168                         0 : -EIO;
3169         case TPACPI_VIDEO_NEW:
3170                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3171                         0 : -EIO;
3172         default:
3173                 return -ENOSYS;
3174         }
3175         /* not reached */
3176 }
3177
3178 static int video_read(char *p)
3179 {
3180         int status, autosw;
3181         int len = 0;
3182
3183         if (video_supported == TPACPI_VIDEO_NONE) {
3184                 len += sprintf(p + len, "status:\t\tnot supported\n");
3185                 return len;
3186         }
3187
3188         status = video_outputsw_get();
3189         if (status < 0)
3190                 return status;
3191
3192         autosw = video_autosw_get();
3193         if (autosw < 0)
3194                 return autosw;
3195
3196         len += sprintf(p + len, "status:\t\tsupported\n");
3197         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3198         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3199         if (video_supported == TPACPI_VIDEO_NEW)
3200                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3201         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3202         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3203         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3204         if (video_supported == TPACPI_VIDEO_NEW)
3205                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3206         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3207         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3208
3209         return len;
3210 }
3211
3212 static int video_write(char *buf)
3213 {
3214         char *cmd;
3215         int enable, disable, status;
3216         int res;
3217
3218         if (video_supported == TPACPI_VIDEO_NONE)
3219                 return -ENODEV;
3220
3221         enable = 0;
3222         disable = 0;
3223
3224         while ((cmd = next_cmd(&buf))) {
3225                 if (strlencmp(cmd, "lcd_enable") == 0) {
3226                         enable |= TP_ACPI_VIDEO_S_LCD;
3227                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3228                         disable |= TP_ACPI_VIDEO_S_LCD;
3229                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3230                         enable |= TP_ACPI_VIDEO_S_CRT;
3231                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3232                         disable |= TP_ACPI_VIDEO_S_CRT;
3233                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3234                            strlencmp(cmd, "dvi_enable") == 0) {
3235                         enable |= TP_ACPI_VIDEO_S_DVI;
3236                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3237                            strlencmp(cmd, "dvi_disable") == 0) {
3238                         disable |= TP_ACPI_VIDEO_S_DVI;
3239                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3240                         res = video_autosw_set(1);
3241                         if (res)
3242                                 return res;
3243                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3244                         res = video_autosw_set(0);
3245                         if (res)
3246                                 return res;
3247                 } else if (strlencmp(cmd, "video_switch") == 0) {
3248                         res = video_outputsw_cycle();
3249                         if (res)
3250                                 return res;
3251                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3252                         res = video_expand_toggle();
3253                         if (res)
3254                                 return res;
3255                 } else
3256                         return -EINVAL;
3257         }
3258
3259         if (enable || disable) {
3260                 status = video_outputsw_get();
3261                 if (status < 0)
3262                         return status;
3263                 res = video_outputsw_set((status & ~disable) | enable);
3264                 if (res)
3265                         return res;
3266         }
3267
3268         return 0;
3269 }
3270
3271 static struct ibm_struct video_driver_data = {
3272         .name = "video",
3273         .read = video_read,
3274         .write = video_write,
3275         .exit = video_exit,
3276 };
3277
3278 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3279
3280 /*************************************************************************
3281  * Light (thinklight) subdriver
3282  */
3283
3284 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3285 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3286
3287 static int light_get_status(void)
3288 {
3289         int status = 0;
3290
3291         if (tp_features.light_status) {
3292                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3293                         return -EIO;
3294                 return (!!status);
3295         }
3296
3297         return -ENXIO;
3298 }
3299
3300 static int light_set_status(int status)
3301 {
3302         int rc;
3303
3304         if (tp_features.light) {
3305                 if (cmos_handle) {
3306                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3307                                         (status)?
3308                                                 TP_CMOS_THINKLIGHT_ON :
3309                                                 TP_CMOS_THINKLIGHT_OFF);
3310                 } else {
3311                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3312                                         (status)? 1 : 0);
3313                 }
3314                 return (rc)? 0 : -EIO;
3315         }
3316
3317         return -ENXIO;
3318 }
3319
3320 static void light_set_status_worker(struct work_struct *work)
3321 {
3322         struct tpacpi_led_classdev *data =
3323                         container_of(work, struct tpacpi_led_classdev, work);
3324
3325         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3326                 light_set_status((data->new_brightness != LED_OFF));
3327 }
3328
3329 static void light_sysfs_set(struct led_classdev *led_cdev,
3330                         enum led_brightness brightness)
3331 {
3332         struct tpacpi_led_classdev *data =
3333                 container_of(led_cdev,
3334                              struct tpacpi_led_classdev,
3335                              led_classdev);
3336         data->new_brightness = brightness;
3337         queue_work(tpacpi_wq, &data->work);
3338 }
3339
3340 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3341 {
3342         return (light_get_status() == 1)? LED_FULL : LED_OFF;
3343 }
3344
3345 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3346         .led_classdev = {
3347                 .name           = "tpacpi::thinklight",
3348                 .brightness_set = &light_sysfs_set,
3349                 .brightness_get = &light_sysfs_get,
3350         }
3351 };
3352
3353 static int __init light_init(struct ibm_init_struct *iibm)
3354 {
3355         int rc;
3356
3357         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3358
3359         TPACPI_ACPIHANDLE_INIT(ledb);
3360         TPACPI_ACPIHANDLE_INIT(lght);
3361         TPACPI_ACPIHANDLE_INIT(cmos);
3362         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3363
3364         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3365         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3366
3367         if (tp_features.light)
3368                 /* light status not supported on
3369                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3370                 tp_features.light_status =
3371                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3372
3373         vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n",
3374                 str_supported(tp_features.light),
3375                 str_supported(tp_features.light_status));
3376
3377         if (!tp_features.light)
3378                 return 1;
3379
3380         rc = led_classdev_register(&tpacpi_pdev->dev,
3381                                    &tpacpi_led_thinklight.led_classdev);
3382
3383         if (rc < 0) {
3384                 tp_features.light = 0;
3385                 tp_features.light_status = 0;
3386         } else  {
3387                 rc = 0;
3388         }
3389
3390         return rc;
3391 }
3392
3393 static void light_exit(void)
3394 {
3395         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3396         if (work_pending(&tpacpi_led_thinklight.work))
3397                 flush_workqueue(tpacpi_wq);
3398 }
3399
3400 static int light_read(char *p)
3401 {
3402         int len = 0;
3403         int status;
3404
3405         if (!tp_features.light) {
3406                 len += sprintf(p + len, "status:\t\tnot supported\n");
3407         } else if (!tp_features.light_status) {
3408                 len += sprintf(p + len, "status:\t\tunknown\n");
3409                 len += sprintf(p + len, "commands:\ton, off\n");
3410         } else {
3411                 status = light_get_status();
3412                 if (status < 0)
3413                         return status;
3414                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3415                 len += sprintf(p + len, "commands:\ton, off\n");
3416         }
3417
3418         return len;
3419 }
3420
3421 static int light_write(char *buf)
3422 {
3423         char *cmd;
3424         int newstatus = 0;
3425
3426         if (!tp_features.light)
3427                 return -ENODEV;
3428
3429         while ((cmd = next_cmd(&buf))) {
3430                 if (strlencmp(cmd, "on") == 0) {
3431                         newstatus = 1;
3432                 } else if (strlencmp(cmd, "off") == 0) {
3433                         newstatus = 0;
3434                 } else
3435                         return -EINVAL;
3436         }
3437
3438         return light_set_status(newstatus);
3439 }
3440
3441 static struct ibm_struct light_driver_data = {
3442         .name = "light",
3443         .read = light_read,
3444         .write = light_write,
3445         .exit = light_exit,
3446 };
3447
3448 /*************************************************************************
3449  * Dock subdriver
3450  */
3451
3452 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3453
3454 static void dock_notify(struct ibm_struct *ibm, u32 event);
3455 static int dock_read(char *p);
3456 static int dock_write(char *buf);
3457
3458 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3459            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3460            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3461            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3462     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3463
3464 /* don't list other alternatives as we install a notify handler on the 570 */
3465 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3466
3467 static const struct acpi_device_id ibm_pci_device_ids[] = {
3468         {PCI_ROOT_HID_STRING, 0},
3469         {"", 0},
3470 };
3471
3472 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3473         {
3474          .notify = dock_notify,
3475          .handle = &dock_handle,
3476          .type = ACPI_SYSTEM_NOTIFY,
3477         },
3478         {
3479         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3480          * We just use it to get notifications of dock hotplug
3481          * in very old thinkpads */
3482          .hid = ibm_pci_device_ids,
3483          .notify = dock_notify,
3484          .handle = &pci_handle,
3485          .type = ACPI_SYSTEM_NOTIFY,
3486         },
3487 };
3488
3489 static struct ibm_struct dock_driver_data[2] = {
3490         {
3491          .name = "dock",
3492          .read = dock_read,
3493          .write = dock_write,
3494          .acpi = &ibm_dock_acpidriver[0],
3495         },
3496         {
3497          .name = "dock",
3498          .acpi = &ibm_dock_acpidriver[1],
3499         },
3500 };
3501
3502 #define dock_docked() (_sta(dock_handle) & 1)
3503
3504 static int __init dock_init(struct ibm_init_struct *iibm)
3505 {
3506         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3507
3508         TPACPI_ACPIHANDLE_INIT(dock);
3509
3510         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3511                 str_supported(dock_handle != NULL));
3512
3513         return (dock_handle)? 0 : 1;
3514 }
3515
3516 static int __init dock_init2(struct ibm_init_struct *iibm)
3517 {
3518         int dock2_needed;
3519
3520         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3521
3522         if (dock_driver_data[0].flags.acpi_driver_registered &&
3523             dock_driver_data[0].flags.acpi_notify_installed) {
3524                 TPACPI_ACPIHANDLE_INIT(pci);
3525                 dock2_needed = (pci_handle != NULL);
3526                 vdbg_printk(TPACPI_DBG_INIT,
3527                             "dock PCI handler for the TP 570 is %s\n",
3528                             str_supported(dock2_needed));
3529         } else {
3530                 vdbg_printk(TPACPI_DBG_INIT,
3531                 "dock subdriver part 2 not required\n");
3532                 dock2_needed = 0;
3533         }
3534
3535         return (dock2_needed)? 0 : 1;
3536 }
3537
3538 static void dock_notify(struct ibm_struct *ibm, u32 event)
3539 {
3540         int docked = dock_docked();
3541         int pci = ibm->acpi->hid && ibm->acpi->device &&
3542                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3543         int data;
3544
3545         if (event == 1 && !pci) /* 570 */
3546                 data = 1;       /* button */
3547         else if (event == 1 && pci)     /* 570 */
3548                 data = 3;       /* dock */
3549         else if (event == 3 && docked)
3550                 data = 1;       /* button */
3551         else if (event == 3 && !docked)
3552                 data = 2;       /* undock */
3553         else if (event == 0 && docked)
3554                 data = 3;       /* dock */
3555         else {
3556                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3557                        event, _sta(dock_handle));
3558                 data = 0;       /* unknown */
3559         }
3560         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3561         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3562                                           ibm->acpi->device->dev.bus_id,
3563                                           event, data);
3564 }
3565
3566 static int dock_read(char *p)
3567 {
3568         int len = 0;
3569         int docked = dock_docked();
3570
3571         if (!dock_handle)
3572                 len += sprintf(p + len, "status:\t\tnot supported\n");
3573         else if (!docked)
3574                 len += sprintf(p + len, "status:\t\tundocked\n");
3575         else {
3576                 len += sprintf(p + len, "status:\t\tdocked\n");
3577                 len += sprintf(p + len, "commands:\tdock, undock\n");
3578         }
3579
3580         return len;
3581 }
3582
3583 static int dock_write(char *buf)
3584 {
3585         char *cmd;
3586
3587         if (!dock_docked())
3588                 return -ENODEV;
3589
3590         while ((cmd = next_cmd(&buf))) {
3591                 if (strlencmp(cmd, "undock") == 0) {
3592                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3593                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3594                                 return -EIO;
3595                 } else if (strlencmp(cmd, "dock") == 0) {
3596                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3597                                 return -EIO;
3598                 } else
3599                         return -EINVAL;
3600         }
3601
3602         return 0;
3603 }
3604
3605 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3606
3607 /*************************************************************************
3608  * Bay subdriver
3609  */
3610
3611 #ifdef CONFIG_THINKPAD_ACPI_BAY
3612
3613 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3614            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3615            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3616            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3617            );                           /* A21e, R30, R31 */
3618 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3619            "_EJ0",              /* all others */
3620            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3621 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3622            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3623            );                           /* all others */
3624 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3625            "_EJ0",                      /* 770x */
3626            );                           /* all others */
3627
3628 static int __init bay_init(struct ibm_init_struct *iibm)
3629 {
3630         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3631
3632         TPACPI_ACPIHANDLE_INIT(bay);
3633         if (bay_handle)
3634                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3635         TPACPI_ACPIHANDLE_INIT(bay2);
3636         if (bay2_handle)
3637                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3638
3639         tp_features.bay_status = bay_handle &&
3640                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3641         tp_features.bay_status2 = bay2_handle &&
3642                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3643
3644         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3645                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3646         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3647                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3648
3649         vdbg_printk(TPACPI_DBG_INIT,
3650                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3651                 str_supported(tp_features.bay_status),
3652                 str_supported(tp_features.bay_eject),
3653                 str_supported(tp_features.bay_status2),
3654                 str_supported(tp_features.bay_eject2));
3655
3656         return (tp_features.bay_status || tp_features.bay_eject ||
3657                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3658 }
3659
3660 static void bay_notify(struct ibm_struct *ibm, u32 event)
3661 {
3662         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3663         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3664                                           ibm->acpi->device->dev.bus_id,
3665                                           event, 0);
3666 }
3667
3668 #define bay_occupied(b) (_sta(b##_handle) & 1)
3669
3670 static int bay_read(char *p)
3671 {
3672         int len = 0;
3673         int occupied = bay_occupied(bay);
3674         int occupied2 = bay_occupied(bay2);
3675         int eject, eject2;
3676
3677         len += sprintf(p + len, "status:\t\t%s\n",
3678                 tp_features.bay_status ?
3679                         (occupied ? "occupied" : "unoccupied") :
3680                                 "not supported");
3681         if (tp_features.bay_status2)
3682                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3683                                "occupied" : "unoccupied");
3684
3685         eject = tp_features.bay_eject && occupied;
3686         eject2 = tp_features.bay_eject2 && occupied2;
3687
3688         if (eject && eject2)
3689                 len += sprintf(p + len, "commands:\teject, eject2\n");
3690         else if (eject)
3691                 len += sprintf(p + len, "commands:\teject\n");
3692         else if (eject2)
3693                 len += sprintf(p + len, "commands:\teject2\n");
3694
3695         return len;
3696 }
3697
3698 static int bay_write(char *buf)
3699 {
3700         char *cmd;
3701
3702         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3703                 return -ENODEV;
3704
3705         while ((cmd = next_cmd(&buf))) {
3706                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3707                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3708                                 return -EIO;
3709                 } else if (tp_features.bay_eject2 &&
3710                            strlencmp(cmd, "eject2") == 0) {
3711                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3712                                 return -EIO;
3713                 } else
3714                         return -EINVAL;
3715         }
3716
3717         return 0;
3718 }
3719
3720 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3721         .notify = bay_notify,
3722         .handle = &bay_handle,
3723         .type = ACPI_SYSTEM_NOTIFY,
3724 };
3725
3726 static struct ibm_struct bay_driver_data = {
3727         .name = "bay",
3728         .read = bay_read,
3729         .write = bay_write,
3730         .acpi = &ibm_bay_acpidriver,
3731 };
3732
3733 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3734
3735 /*************************************************************************
3736  * CMOS subdriver
3737  */
3738
3739 /* sysfs cmos_command -------------------------------------------------- */
3740 static ssize_t cmos_command_store(struct device *dev,
3741                             struct device_attribute *attr,
3742                             const char *buf, size_t count)
3743 {
3744         unsigned long cmos_cmd;
3745         int res;
3746
3747         if (parse_strtoul(buf, 21, &cmos_cmd))
3748                 return -EINVAL;
3749
3750         res = issue_thinkpad_cmos_command(cmos_cmd);
3751         return (res)? res : count;
3752 }
3753
3754 static struct device_attribute dev_attr_cmos_command =
3755         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3756
3757 /* --------------------------------------------------------------------- */
3758
3759 static int __init cmos_init(struct ibm_init_struct *iibm)
3760 {
3761         int res;
3762
3763         vdbg_printk(TPACPI_DBG_INIT,
3764                 "initializing cmos commands subdriver\n");
3765
3766         TPACPI_ACPIHANDLE_INIT(cmos);
3767
3768         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3769                 str_supported(cmos_handle != NULL));
3770
3771         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3772         if (res)
3773                 return res;
3774
3775         return (cmos_handle)? 0 : 1;
3776 }
3777
3778 static void cmos_exit(void)
3779 {
3780         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3781 }
3782
3783 static int cmos_read(char *p)
3784 {
3785         int len = 0;
3786
3787         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3788            R30, R31, T20-22, X20-21 */
3789         if (!cmos_handle)
3790                 len += sprintf(p + len, "status:\t\tnot supported\n");
3791         else {
3792                 len += sprintf(p + len, "status:\t\tsupported\n");
3793                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3794         }
3795
3796         return len;
3797 }
3798
3799 static int cmos_write(char *buf)
3800 {
3801         char *cmd;
3802         int cmos_cmd, res;
3803
3804         while ((cmd = next_cmd(&buf))) {
3805                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3806                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3807                         /* cmos_cmd set */
3808                 } else
3809                         return -EINVAL;
3810
3811                 res = issue_thinkpad_cmos_command(cmos_cmd);
3812                 if (res)
3813                         return res;
3814         }
3815
3816         return 0;
3817 }
3818
3819 static struct ibm_struct cmos_driver_data = {
3820         .name = "cmos",
3821         .read = cmos_read,
3822         .write = cmos_write,
3823         .exit = cmos_exit,
3824 };
3825
3826 /*************************************************************************
3827  * LED subdriver
3828  */
3829
3830 enum led_access_mode {
3831         TPACPI_LED_NONE = 0,
3832         TPACPI_LED_570, /* 570 */
3833         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3834         TPACPI_LED_NEW, /* all others */
3835 };
3836
3837 enum {  /* For TPACPI_LED_OLD */
3838         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3839         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3840         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3841 };
3842
3843 enum led_status_t {
3844         TPACPI_LED_OFF = 0,
3845         TPACPI_LED_ON,
3846         TPACPI_LED_BLINK,
3847 };
3848
3849 static enum led_access_mode led_supported;
3850
3851 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3852            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3853                                 /* T20-22, X20-21 */
3854            "LED",               /* all others */
3855            );                   /* R30, R31 */
3856
3857 #define TPACPI_LED_NUMLEDS 8
3858 static struct tpacpi_led_classdev *tpacpi_leds;
3859 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
3860 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
3861         /* there's a limit of 19 chars + NULL before 2.6.26 */
3862         "tpacpi::power",
3863         "tpacpi:orange:batt",
3864         "tpacpi:green:batt",
3865         "tpacpi::dock_active",
3866         "tpacpi::bay_active",
3867         "tpacpi::dock_batt",
3868         "tpacpi::unknown_led",
3869         "tpacpi::standby",
3870 };
3871
3872 static int led_get_status(const unsigned int led)
3873 {
3874         int status;
3875         enum led_status_t led_s;
3876
3877         switch (led_supported) {
3878         case TPACPI_LED_570:
3879                 if (!acpi_evalf(ec_handle,
3880                                 &status, "GLED", "dd", 1 << led))
3881                         return -EIO;
3882                 led_s = (status == 0)?
3883                                 TPACPI_LED_OFF :
3884                                 ((status == 1)?
3885                                         TPACPI_LED_ON :
3886                                         TPACPI_LED_BLINK);
3887                 tpacpi_led_state_cache[led] = led_s;
3888                 return led_s;
3889         default:
3890                 return -ENXIO;
3891         }
3892
3893         /* not reached */
3894 }
3895
3896 static int led_set_status(const unsigned int led,
3897                           const enum led_status_t ledstatus)
3898 {
3899         /* off, on, blink. Index is led_status_t */
3900         static const unsigned int led_sled_arg1[] = { 0, 1, 3 };
3901         static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 };
3902
3903         int rc = 0;
3904
3905         switch (led_supported) {
3906         case TPACPI_LED_570:
3907                 /* 570 */
3908                 if (led > 7)
3909                         return -EINVAL;
3910                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3911                                 (1 << led), led_sled_arg1[ledstatus]))
3912                         rc = -EIO;
3913                 break;
3914         case TPACPI_LED_OLD:
3915                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3916                 if (led > 7)
3917                         return -EINVAL;
3918                 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led));
3919                 if (rc >= 0)
3920                         rc = ec_write(TPACPI_LED_EC_HLBL,
3921                                       (ledstatus == TPACPI_LED_BLINK) << led);
3922                 if (rc >= 0)
3923                         rc = ec_write(TPACPI_LED_EC_HLCL,
3924                                       (ledstatus != TPACPI_LED_OFF) << led);
3925                 break;
3926         case TPACPI_LED_NEW:
3927                 /* all others */
3928                 if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3929                                 led, led_led_arg1[ledstatus]))
3930                         rc = -EIO;
3931                 break;
3932         default:
3933                 rc = -ENXIO;
3934         }
3935
3936         if (!rc)
3937                 tpacpi_led_state_cache[led] = ledstatus;
3938
3939         return rc;
3940 }
3941
3942 static void led_sysfs_set_status(unsigned int led,
3943                                  enum led_brightness brightness)
3944 {
3945         led_set_status(led,
3946                         (brightness == LED_OFF) ?
3947                         TPACPI_LED_OFF :
3948                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
3949                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
3950 }
3951
3952 static void led_set_status_worker(struct work_struct *work)
3953 {
3954         struct tpacpi_led_classdev *data =
3955                 container_of(work, struct tpacpi_led_classdev, work);
3956
3957         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3958                 led_sysfs_set_status(data->led, data->new_brightness);
3959 }
3960
3961 static void led_sysfs_set(struct led_classdev *led_cdev,
3962                         enum led_brightness brightness)
3963 {
3964         struct tpacpi_led_classdev *data = container_of(led_cdev,
3965                              struct tpacpi_led_classdev, led_classdev);
3966
3967         data->new_brightness = brightness;
3968         queue_work(tpacpi_wq, &data->work);
3969 }
3970
3971 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
3972                         unsigned long *delay_on, unsigned long *delay_off)
3973 {
3974         struct tpacpi_led_classdev *data = container_of(led_cdev,
3975                              struct tpacpi_led_classdev, led_classdev);
3976
3977         /* Can we choose the flash rate? */
3978         if (*delay_on == 0 && *delay_off == 0) {
3979                 /* yes. set them to the hardware blink rate (1 Hz) */
3980                 *delay_on = 500; /* ms */
3981                 *delay_off = 500; /* ms */
3982         } else if ((*delay_on != 500) || (*delay_off != 500))
3983                 return -EINVAL;
3984
3985         data->new_brightness = TPACPI_LED_BLINK;
3986         queue_work(tpacpi_wq, &data->work);
3987
3988         return 0;
3989 }
3990
3991 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
3992 {
3993         int rc;
3994
3995         struct tpacpi_led_classdev *data = container_of(led_cdev,
3996                              struct tpacpi_led_classdev, led_classdev);
3997
3998         rc = led_get_status(data->led);
3999
4000         if (rc == TPACPI_LED_OFF || rc < 0)
4001                 rc = LED_OFF;   /* no error handling in led class :( */
4002         else
4003                 rc = LED_FULL;
4004
4005         return rc;
4006 }
4007
4008 static void led_exit(void)
4009 {
4010         unsigned int i;
4011
4012         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4013                 if (tpacpi_leds[i].led_classdev.name)
4014                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
4015         }
4016
4017         kfree(tpacpi_leds);
4018 }
4019
4020 static int __init led_init(struct ibm_init_struct *iibm)
4021 {
4022         unsigned int i;
4023         int rc;
4024
4025         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
4026
4027         TPACPI_ACPIHANDLE_INIT(led);
4028
4029         if (!led_handle)
4030                 /* led not supported on R30, R31 */
4031                 led_supported = TPACPI_LED_NONE;
4032         else if (strlencmp(led_path, "SLED") == 0)
4033                 /* 570 */
4034                 led_supported = TPACPI_LED_570;
4035         else if (strlencmp(led_path, "SYSL") == 0)
4036                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
4037                 led_supported = TPACPI_LED_OLD;
4038         else
4039                 /* all others */
4040                 led_supported = TPACPI_LED_NEW;
4041
4042         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4043                 str_supported(led_supported), led_supported);
4044
4045         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4046                               GFP_KERNEL);
4047         if (!tpacpi_leds) {
4048                 printk(TPACPI_ERR "Out of memory for LED data\n");
4049                 return -ENOMEM;
4050         }
4051
4052         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4053                 tpacpi_leds[i].led = i;
4054
4055                 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4056                 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4057                 if (led_supported == TPACPI_LED_570)
4058                         tpacpi_leds[i].led_classdev.brightness_get =
4059                                                         &led_sysfs_get;
4060
4061                 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4062
4063                 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4064
4065                 rc = led_classdev_register(&tpacpi_pdev->dev,
4066                                            &tpacpi_leds[i].led_classdev);
4067                 if (rc < 0) {
4068                         tpacpi_leds[i].led_classdev.name = NULL;
4069                         led_exit();
4070                         return rc;
4071                 }
4072         }
4073
4074         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4075 }
4076
4077 #define str_led_status(s) \
4078         ((s) == TPACPI_LED_OFF ? "off" : \
4079                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4080
4081 static int led_read(char *p)
4082 {
4083         int len = 0;
4084
4085         if (!led_supported) {
4086                 len += sprintf(p + len, "status:\t\tnot supported\n");
4087                 return len;
4088         }
4089         len += sprintf(p + len, "status:\t\tsupported\n");
4090
4091         if (led_supported == TPACPI_LED_570) {
4092                 /* 570 */
4093                 int i, status;
4094                 for (i = 0; i < 8; i++) {
4095                         status = led_get_status(i);
4096                         if (status < 0)
4097                                 return -EIO;
4098                         len += sprintf(p + len, "%d:\t\t%s\n",
4099                                        i, str_led_status(status));
4100                 }
4101         }
4102
4103         len += sprintf(p + len, "commands:\t"
4104                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4105
4106         return len;
4107 }
4108
4109 static int led_write(char *buf)
4110 {
4111         char *cmd;
4112         int led, rc;
4113         enum led_status_t s;
4114
4115         if (!led_supported)
4116                 return -ENODEV;
4117
4118         while ((cmd = next_cmd(&buf))) {
4119                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4120                         return -EINVAL;
4121
4122                 if (strstr(cmd, "off")) {
4123                         s = TPACPI_LED_OFF;
4124                 } else if (strstr(cmd, "on")) {
4125                         s = TPACPI_LED_ON;
4126                 } else if (strstr(cmd, "blink")) {
4127                         s = TPACPI_LED_BLINK;
4128                 } else {
4129                         return -EINVAL;
4130                 }
4131
4132                 rc = led_set_status(led, s);
4133                 if (rc < 0)
4134                         return rc;
4135         }
4136
4137         return 0;
4138 }
4139
4140 static struct ibm_struct led_driver_data = {
4141         .name = "led",
4142         .read = led_read,
4143         .write = led_write,
4144         .exit = led_exit,
4145 };
4146
4147 /*************************************************************************
4148  * Beep subdriver
4149  */
4150
4151 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4152
4153 static int __init beep_init(struct ibm_init_struct *iibm)
4154 {
4155         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4156
4157         TPACPI_ACPIHANDLE_INIT(beep);
4158
4159         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4160                 str_supported(beep_handle != NULL));
4161
4162         return (beep_handle)? 0 : 1;
4163 }
4164
4165 static int beep_read(char *p)
4166 {
4167         int len = 0;
4168
4169         if (!beep_handle)
4170                 len += sprintf(p + len, "status:\t\tnot supported\n");
4171         else {
4172                 len += sprintf(p + len, "status:\t\tsupported\n");
4173                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4174         }
4175
4176         return len;
4177 }
4178
4179 static int beep_write(char *buf)
4180 {
4181         char *cmd;
4182         int beep_cmd;
4183
4184         if (!beep_handle)
4185                 return -ENODEV;
4186
4187         while ((cmd = next_cmd(&buf))) {
4188                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4189                     beep_cmd >= 0 && beep_cmd <= 17) {
4190                         /* beep_cmd set */
4191                 } else
4192                         return -EINVAL;
4193                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4194                         return -EIO;
4195         }
4196
4197         return 0;
4198 }
4199
4200 static struct ibm_struct beep_driver_data = {
4201         .name = "beep",
4202         .read = beep_read,
4203         .write = beep_write,
4204 };
4205
4206 /*************************************************************************
4207  * Thermal subdriver
4208  */
4209
4210 enum thermal_access_mode {
4211         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
4212         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
4213         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
4214         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
4215         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
4216 };
4217
4218 enum { /* TPACPI_THERMAL_TPEC_* */
4219         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
4220         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
4221         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
4222 };
4223
4224 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
4225 struct ibm_thermal_sensors_struct {
4226         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4227 };
4228
4229 static enum thermal_access_mode thermal_read_mode;
4230
4231 /* idx is zero-based */
4232 static int thermal_get_sensor(int idx, s32 *value)
4233 {
4234         int t;
4235         s8 tmp;
4236         char tmpi[5];
4237
4238         t = TP_EC_THERMAL_TMP0;
4239
4240         switch (thermal_read_mode) {
4241 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4242         case TPACPI_THERMAL_TPEC_16:
4243                 if (idx >= 8 && idx <= 15) {
4244                         t = TP_EC_THERMAL_TMP8;
4245                         idx -= 8;
4246                 }
4247                 /* fallthrough */
4248 #endif
4249         case TPACPI_THERMAL_TPEC_8:
4250                 if (idx <= 7) {
4251                         if (!acpi_ec_read(t + idx, &tmp))
4252                                 return -EIO;
4253                         *value = tmp * 1000;
4254                         return 0;
4255                 }
4256                 break;
4257
4258         case TPACPI_THERMAL_ACPI_UPDT:
4259                 if (idx <= 7) {
4260                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4261                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4262                                 return -EIO;
4263                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4264                                 return -EIO;
4265                         *value = (t - 2732) * 100;
4266                         return 0;
4267                 }
4268                 break;
4269
4270         case TPACPI_THERMAL_ACPI_TMP07:
4271                 if (idx <= 7) {
4272                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4273                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4274                                 return -EIO;
4275                         if (t > 127 || t < -127)
4276                                 t = TP_EC_THERMAL_TMP_NA;
4277                         *value = t * 1000;
4278                         return 0;
4279                 }
4280                 break;
4281
4282         case TPACPI_THERMAL_NONE:
4283         default:
4284                 return -ENOSYS;
4285         }
4286
4287         return -EINVAL;
4288 }
4289
4290 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4291 {
4292         int res, i;
4293         int n;
4294
4295         n = 8;
4296         i = 0;
4297
4298         if (!s)
4299                 return -EINVAL;
4300
4301         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4302                 n = 16;
4303
4304         for (i = 0 ; i < n; i++) {
4305                 res = thermal_get_sensor(i, &s->temp[i]);
4306                 if (res)
4307                         return res;
4308         }
4309
4310         return n;
4311 }
4312
4313 /* sysfs temp##_input -------------------------------------------------- */
4314
4315 static ssize_t thermal_temp_input_show(struct device *dev,
4316                            struct device_attribute *attr,
4317                            char *buf)
4318 {
4319         struct sensor_device_attribute *sensor_attr =
4320                                         to_sensor_dev_attr(attr);
4321         int idx = sensor_attr->index;
4322         s32 value;
4323         int res;
4324
4325         res = thermal_get_sensor(idx, &value);
4326         if (res)
4327                 return res;
4328         if (value == TP_EC_THERMAL_TMP_NA * 1000)
4329                 return -ENXIO;
4330
4331         return snprintf(buf, PAGE_SIZE, "%d\n", value);
4332 }
4333
4334 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4335          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4336                      thermal_temp_input_show, NULL, _idxB)
4337
4338 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4339         THERMAL_SENSOR_ATTR_TEMP(1, 0),
4340         THERMAL_SENSOR_ATTR_TEMP(2, 1),
4341         THERMAL_SENSOR_ATTR_TEMP(3, 2),
4342         THERMAL_SENSOR_ATTR_TEMP(4, 3),
4343         THERMAL_SENSOR_ATTR_TEMP(5, 4),
4344         THERMAL_SENSOR_ATTR_TEMP(6, 5),
4345         THERMAL_SENSOR_ATTR_TEMP(7, 6),
4346         THERMAL_SENSOR_ATTR_TEMP(8, 7),
4347         THERMAL_SENSOR_ATTR_TEMP(9, 8),
4348         THERMAL_SENSOR_ATTR_TEMP(10, 9),
4349         THERMAL_SENSOR_ATTR_TEMP(11, 10),
4350         THERMAL_SENSOR_ATTR_TEMP(12, 11),
4351         THERMAL_SENSOR_ATTR_TEMP(13, 12),
4352         THERMAL_SENSOR_ATTR_TEMP(14, 13),
4353         THERMAL_SENSOR_ATTR_TEMP(15, 14),
4354         THERMAL_SENSOR_ATTR_TEMP(16, 15),
4355 };
4356
4357 #define THERMAL_ATTRS(X) \
4358         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4359
4360 static struct attribute *thermal_temp_input_attr[] = {
4361         THERMAL_ATTRS(8),
4362         THERMAL_ATTRS(9),
4363         THERMAL_ATTRS(10),
4364         THERMAL_ATTRS(11),
4365         THERMAL_ATTRS(12),
4366         THERMAL_ATTRS(13),
4367         THERMAL_ATTRS(14),
4368         THERMAL_ATTRS(15),
4369         THERMAL_ATTRS(0),
4370         THERMAL_ATTRS(1),
4371         THERMAL_ATTRS(2),
4372         THERMAL_ATTRS(3),
4373         THERMAL_ATTRS(4),
4374         THERMAL_ATTRS(5),
4375         THERMAL_ATTRS(6),
4376         THERMAL_ATTRS(7),
4377         NULL
4378 };
4379
4380 static const struct attribute_group thermal_temp_input16_group = {
4381         .attrs = thermal_temp_input_attr
4382 };
4383
4384 static const struct attribute_group thermal_temp_input8_group = {
4385         .attrs = &thermal_temp_input_attr[8]
4386 };
4387
4388 #undef THERMAL_SENSOR_ATTR_TEMP
4389 #undef THERMAL_ATTRS
4390
4391 /* --------------------------------------------------------------------- */
4392
4393 static int __init thermal_init(struct ibm_init_struct *iibm)
4394 {
4395         u8 t, ta1, ta2;
4396         int i;
4397         int acpi_tmp7;
4398         int res;
4399
4400         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4401
4402         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4403
4404         if (thinkpad_id.ec_model) {
4405                 /*
4406                  * Direct EC access mode: sensors at registers
4407                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
4408                  * non-implemented, thermal sensors return 0x80 when
4409                  * not available
4410                  */
4411
4412                 ta1 = ta2 = 0;
4413                 for (i = 0; i < 8; i++) {
4414                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4415                                 ta1 |= t;
4416                         } else {
4417                                 ta1 = 0;
4418                                 break;
4419                         }
4420                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4421                                 ta2 |= t;
4422                         } else {
4423                                 ta1 = 0;
4424                                 break;
4425                         }
4426                 }
4427                 if (ta1 == 0) {
4428                         /* This is sheer paranoia, but we handle it anyway */
4429                         if (acpi_tmp7) {
4430                                 printk(TPACPI_ERR
4431                                        "ThinkPad ACPI EC access misbehaving, "
4432                                        "falling back to ACPI TMPx access "
4433                                        "mode\n");
4434                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4435                         } else {
4436                                 printk(TPACPI_ERR
4437                                        "ThinkPad ACPI EC access misbehaving, "
4438                                        "disabling thermal sensors access\n");
4439                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4440                         }
4441                 } else {
4442                         thermal_read_mode =
4443                             (ta2 != 0) ?
4444                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4445                 }
4446         } else if (acpi_tmp7) {
4447                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4448                         /* 600e/x, 770e, 770x */
4449                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4450                 } else {
4451                         /* Standard ACPI TMPx access, max 8 sensors */
4452                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4453                 }
4454         } else {
4455                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4456                 thermal_read_mode = TPACPI_THERMAL_NONE;
4457         }
4458
4459         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4460                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4461                 thermal_read_mode);
4462
4463         switch (thermal_read_mode) {
4464         case TPACPI_THERMAL_TPEC_16:
4465                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4466                                 &thermal_temp_input16_group);
4467                 if (res)
4468                         return res;
4469                 break;
4470         case TPACPI_THERMAL_TPEC_8:
4471         case TPACPI_THERMAL_ACPI_TMP07:
4472         case TPACPI_THERMAL_ACPI_UPDT:
4473                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4474                                 &thermal_temp_input8_group);
4475                 if (res)
4476                         return res;
4477                 break;
4478         case TPACPI_THERMAL_NONE:
4479         default:
4480                 return 1;
4481         }
4482
4483         return 0;
4484 }
4485
4486 static void thermal_exit(void)
4487 {
4488         switch (thermal_read_mode) {
4489         case TPACPI_THERMAL_TPEC_16:
4490                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4491                                    &thermal_temp_input16_group);
4492                 break;
4493         case TPACPI_THERMAL_TPEC_8:
4494         case TPACPI_THERMAL_ACPI_TMP07:
4495         case TPACPI_THERMAL_ACPI_UPDT:
4496                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4497                                    &thermal_temp_input16_group);
4498                 break;
4499         case TPACPI_THERMAL_NONE:
4500         default:
4501                 break;
4502         }
4503 }
4504
4505 static int thermal_read(char *p)
4506 {
4507         int len = 0;
4508         int n, i;
4509         struct ibm_thermal_sensors_struct t;
4510
4511         n = thermal_get_sensors(&t);
4512         if (unlikely(n < 0))
4513                 return n;
4514
4515         len += sprintf(p + len, "temperatures:\t");
4516
4517         if (n > 0) {
4518                 for (i = 0; i < (n - 1); i++)
4519                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4520                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4521         } else
4522                 len += sprintf(p + len, "not supported\n");
4523
4524         return len;
4525 }
4526
4527 static struct ibm_struct thermal_driver_data = {
4528         .name = "thermal",
4529         .read = thermal_read,
4530         .exit = thermal_exit,
4531 };
4532
4533 /*************************************************************************
4534  * EC Dump subdriver
4535  */
4536
4537 static u8 ecdump_regs[256];
4538
4539 static int ecdump_read(char *p)
4540 {
4541         int len = 0;
4542         int i, j;
4543         u8 v;
4544
4545         len += sprintf(p + len, "EC      "
4546                        " +00 +01 +02 +03 +04 +05 +06 +07"
4547                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4548         for (i = 0; i < 256; i += 16) {
4549                 len += sprintf(p + len, "EC 0x%02x:", i);
4550                 for (j = 0; j < 16; j++) {
4551                         if (!acpi_ec_read(i + j, &v))
4552                                 break;
4553                         if (v != ecdump_regs[i + j])
4554                                 len += sprintf(p + len, " *%02x", v);
4555                         else
4556                                 len += sprintf(p + len, "  %02x", v);
4557                         ecdump_regs[i + j] = v;
4558                 }
4559                 len += sprintf(p + len, "\n");
4560                 if (j != 16)
4561                         break;
4562         }
4563
4564         /* These are way too dangerous to advertise openly... */
4565 #if 0
4566         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4567                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4568         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4569                        " (<offset> is 00-ff, <value> is 0-255)\n");
4570 #endif
4571         return len;
4572 }
4573
4574 static int ecdump_write(char *buf)
4575 {
4576         char *cmd;
4577         int i, v;
4578
4579         while ((cmd = next_cmd(&buf))) {
4580                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4581                         /* i and v set */
4582                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4583                         /* i and v set */
4584                 } else
4585                         return -EINVAL;
4586                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4587                         if (!acpi_ec_write(i, v))
4588                                 return -EIO;
4589                 } else
4590                         return -EINVAL;
4591         }
4592
4593         return 0;
4594 }
4595
4596 static struct ibm_struct ecdump_driver_data = {
4597         .name = "ecdump",
4598         .read = ecdump_read,
4599         .write = ecdump_write,
4600         .flags.experimental = 1,
4601 };
4602
4603 /*************************************************************************
4604  * Backlight/brightness subdriver
4605  */
4606
4607 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4608
4609 enum {
4610         TP_EC_BACKLIGHT = 0x31,
4611
4612         /* TP_EC_BACKLIGHT bitmasks */
4613         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4614         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4615         TP_EC_BACKLIGHT_MAPSW = 0x20,
4616 };
4617
4618 static struct backlight_device *ibm_backlight_device;
4619 static int brightness_mode;
4620 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4621
4622 static struct mutex brightness_mutex;
4623
4624 /*
4625  * ThinkPads can read brightness from two places: EC 0x31, or
4626  * CMOS NVRAM byte 0x5E, bits 0-3.
4627  *
4628  * EC 0x31 has the following layout
4629  *   Bit 7: unknown function
4630  *   Bit 6: unknown function
4631  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
4632  *   Bit 4: must be set to zero to avoid problems
4633  *   Bit 3-0: backlight brightness level
4634  *
4635  * brightness_get_raw returns status data in the EC 0x31 layout
4636  */
4637 static int brightness_get_raw(int *status)
4638 {
4639         u8 lec = 0, lcmos = 0, level = 0;
4640
4641         if (brightness_mode & 1) {
4642                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4643                         return -EIO;
4644                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4645         };
4646         if (brightness_mode & 2) {
4647                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4648                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4649                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4650                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4651                 level = lcmos;
4652         }
4653
4654         if (brightness_mode == 3) {
4655                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
4656                 lec &= TP_EC_BACKLIGHT_LVLMSK;
4657                 if (lec == lcmos)
4658                         tp_warned.bright_cmos_ec_unsync = 0;
4659                 else {
4660                         if (!tp_warned.bright_cmos_ec_unsync) {
4661                                 printk(TPACPI_ERR
4662                                         "CMOS NVRAM (%u) and EC (%u) do not "
4663                                         "agree on display brightness level\n",
4664                                         (unsigned int) lcmos,
4665                                         (unsigned int) lec);
4666                                 tp_warned.bright_cmos_ec_unsync = 1;
4667                         }
4668                         return -EIO;
4669                 }
4670         } else {
4671                 *status = level;
4672         }
4673
4674         return 0;
4675 }
4676
4677 /* May return EINTR which can always be mapped to ERESTARTSYS */
4678 static int brightness_set(int value)
4679 {
4680         int cmos_cmd, inc, i, res;
4681         int current_value;
4682         int command_bits;
4683
4684         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4685             value < 0)
4686                 return -EINVAL;
4687
4688         res = mutex_lock_interruptible(&brightness_mutex);
4689         if (res < 0)
4690                 return res;
4691
4692         res = brightness_get_raw(&current_value);
4693         if (res < 0)
4694                 goto errout;
4695
4696         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4697         current_value &= TP_EC_BACKLIGHT_LVLMSK;
4698
4699         cmos_cmd = value > current_value ?
4700                         TP_CMOS_BRIGHTNESS_UP :
4701                         TP_CMOS_BRIGHTNESS_DOWN;
4702         inc = (value > current_value)? 1 : -1;
4703
4704         res = 0;
4705         for (i = current_value; i != value; i += inc) {
4706                 if ((brightness_mode & 2) &&
4707                     issue_thinkpad_cmos_command(cmos_cmd)) {
4708                         res = -EIO;
4709                         goto errout;
4710                 }
4711                 if ((brightness_mode & 1) &&
4712                     !acpi_ec_write(TP_EC_BACKLIGHT,
4713                                    (i + inc) | command_bits)) {
4714                         res = -EIO;
4715                         goto errout;;
4716                 }
4717         }
4718
4719 errout:
4720         mutex_unlock(&brightness_mutex);
4721         return res;
4722 }
4723
4724 /* sysfs backlight class ----------------------------------------------- */
4725
4726 static int brightness_update_status(struct backlight_device *bd)
4727 {
4728         /* it is the backlight class's job (caller) to handle
4729          * EINTR and other errors properly */
4730         return brightness_set(
4731                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4732                  bd->props.power == FB_BLANK_UNBLANK) ?
4733                                 bd->props.brightness : 0);
4734 }
4735
4736 static int brightness_get(struct backlight_device *bd)
4737 {
4738         int status, res;
4739
4740         res = brightness_get_raw(&status);
4741         if (res < 0)
4742                 return 0; /* FIXME: teach backlight about error handling */
4743
4744         return status & TP_EC_BACKLIGHT_LVLMSK;
4745 }
4746
4747 static struct backlight_ops ibm_backlight_data = {
4748         .get_brightness = brightness_get,
4749         .update_status  = brightness_update_status,
4750 };
4751
4752 /* --------------------------------------------------------------------- */
4753
4754 static int __init brightness_init(struct ibm_init_struct *iibm)
4755 {
4756         int b;
4757
4758         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4759
4760         mutex_init(&brightness_mutex);
4761
4762         /*
4763          * We always attempt to detect acpi support, so as to switch
4764          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4765          * going to publish a backlight interface
4766          */
4767         b = tpacpi_check_std_acpi_brightness_support();
4768         if (b > 0) {
4769                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4770                         printk(TPACPI_NOTICE
4771                                "Lenovo BIOS switched to ACPI backlight "
4772                                "control mode\n");
4773                 }
4774                 if (brightness_enable > 1) {
4775                         printk(TPACPI_NOTICE
4776                                "standard ACPI backlight interface "
4777                                "available, not loading native one...\n");
4778                         return 1;
4779                 }
4780         }
4781
4782         if (!brightness_enable) {
4783                 dbg_printk(TPACPI_DBG_INIT,
4784                            "brightness support disabled by "
4785                            "module parameter\n");
4786                 return 1;
4787         }
4788
4789         if (b > 16) {
4790                 printk(TPACPI_ERR
4791                        "Unsupported brightness interface, "
4792                        "please contact %s\n", TPACPI_MAIL);
4793                 return 1;
4794         }
4795         if (b == 16)
4796                 tp_features.bright_16levels = 1;
4797
4798         if (!brightness_mode) {
4799                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4800                         brightness_mode = 2;
4801                 else
4802                         brightness_mode = 3;
4803
4804                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4805                         brightness_mode);
4806         }
4807
4808         if (brightness_mode > 3)
4809                 return -EINVAL;
4810
4811         if (brightness_get_raw(&b) < 0)
4812                 return 1;
4813
4814         if (tp_features.bright_16levels)
4815                 printk(TPACPI_INFO
4816                        "detected a 16-level brightness capable ThinkPad\n");
4817
4818         ibm_backlight_device = backlight_device_register(
4819                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4820                                         &ibm_backlight_data);
4821         if (IS_ERR(ibm_backlight_device)) {
4822                 printk(TPACPI_ERR "Could not register backlight device\n");
4823                 return PTR_ERR(ibm_backlight_device);
4824         }
4825         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4826
4827         ibm_backlight_device->props.max_brightness =
4828                                 (tp_features.bright_16levels)? 15 : 7;
4829         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
4830         backlight_update_status(ibm_backlight_device);
4831
4832         return 0;
4833 }
4834
4835 static void brightness_exit(void)
4836 {
4837         if (ibm_backlight_device) {
4838                 vdbg_printk(TPACPI_DBG_EXIT,
4839                             "calling backlight_device_unregister()\n");
4840                 backlight_device_unregister(ibm_backlight_device);
4841         }
4842 }
4843
4844 static int brightness_read(char *p)
4845 {
4846         int len = 0;
4847         int level;
4848
4849         level = brightness_get(NULL);
4850         if (level < 0) {
4851                 len += sprintf(p + len, "level:\t\tunreadable\n");
4852         } else {
4853                 len += sprintf(p + len, "level:\t\t%d\n", level);
4854                 len += sprintf(p + len, "commands:\tup, down\n");
4855                 len += sprintf(p + len, "commands:\tlevel <level>"
4856                                " (<level> is 0-%d)\n",
4857                                (tp_features.bright_16levels) ? 15 : 7);
4858         }
4859
4860         return len;
4861 }
4862
4863 static int brightness_write(char *buf)
4864 {
4865         int level;
4866         int rc;
4867         char *cmd;
4868         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4869
4870         level = brightness_get(NULL);
4871         if (level < 0)
4872                 return level;
4873
4874         while ((cmd = next_cmd(&buf))) {
4875                 if (strlencmp(cmd, "up") == 0) {
4876                         if (level < max_level)
4877                                 level++;
4878                 } else if (strlencmp(cmd, "down") == 0) {
4879                         if (level > 0)
4880                                 level--;
4881                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4882                            level >= 0 && level <= max_level) {
4883                         /* new level set */
4884                 } else
4885                         return -EINVAL;
4886         }
4887
4888         /*
4889          * Now we know what the final level should be, so we try to set it.
4890          * Doing it this way makes the syscall restartable in case of EINTR
4891          */
4892         rc = brightness_set(level);
4893         return (rc == -EINTR)? ERESTARTSYS : rc;
4894 }
4895
4896 static struct ibm_struct brightness_driver_data = {
4897         .name = "brightness",
4898         .read = brightness_read,
4899         .write = brightness_write,
4900         .exit = brightness_exit,
4901 };
4902
4903 /*************************************************************************
4904  * Volume subdriver
4905  */
4906
4907 static int volume_offset = 0x30;
4908
4909 static int volume_read(char *p)
4910 {
4911         int len = 0;
4912         u8 level;
4913
4914         if (!acpi_ec_read(volume_offset, &level)) {
4915                 len += sprintf(p + len, "level:\t\tunreadable\n");
4916         } else {
4917                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4918                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4919                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4920                 len += sprintf(p + len, "commands:\tlevel <level>"
4921                                " (<level> is 0-15)\n");
4922         }
4923
4924         return len;
4925 }
4926
4927 static int volume_write(char *buf)
4928 {
4929         int cmos_cmd, inc, i;
4930         u8 level, mute;
4931         int new_level, new_mute;
4932         char *cmd;
4933
4934         while ((cmd = next_cmd(&buf))) {
4935                 if (!acpi_ec_read(volume_offset, &level))
4936                         return -EIO;
4937                 new_mute = mute = level & 0x40;
4938                 new_level = level = level & 0xf;
4939
4940                 if (strlencmp(cmd, "up") == 0) {
4941                         if (mute)
4942                                 new_mute = 0;
4943                         else
4944                                 new_level = level == 15 ? 15 : level + 1;
4945                 } else if (strlencmp(cmd, "down") == 0) {
4946                         if (mute)
4947                                 new_mute = 0;
4948                         else
4949                                 new_level = level == 0 ? 0 : level - 1;
4950                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4951                            new_level >= 0 && new_level <= 15) {
4952                         /* new_level set */
4953                 } else if (strlencmp(cmd, "mute") == 0) {
4954                         new_mute = 0x40;
4955                 } else
4956                         return -EINVAL;
4957
4958                 if (new_level != level) {
4959                         /* mute doesn't change */
4960
4961                         cmos_cmd = (new_level > level) ?
4962                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4963                         inc = new_level > level ? 1 : -1;
4964
4965                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4966                                      !acpi_ec_write(volume_offset, level)))
4967                                 return -EIO;
4968
4969                         for (i = level; i != new_level; i += inc)
4970                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4971                                     !acpi_ec_write(volume_offset, i + inc))
4972                                         return -EIO;
4973
4974                         if (mute &&
4975                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4976                              !acpi_ec_write(volume_offset, new_level + mute))) {
4977                                 return -EIO;
4978                         }
4979                 }
4980
4981                 if (new_mute != mute) {
4982                         /* level doesn't change */
4983
4984                         cmos_cmd = (new_mute) ?
4985                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4986
4987                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4988                             !acpi_ec_write(volume_offset, level + new_mute))
4989                                 return -EIO;
4990                 }
4991         }
4992
4993         return 0;
4994 }
4995
4996 static struct ibm_struct volume_driver_data = {
4997         .name = "volume",
4998         .read = volume_read,
4999         .write = volume_write,
5000 };
5001
5002 /*************************************************************************
5003  * Fan subdriver
5004  */
5005
5006 /*
5007  * FAN ACCESS MODES
5008  *
5009  * TPACPI_FAN_RD_ACPI_GFAN:
5010  *      ACPI GFAN method: returns fan level
5011  *
5012  *      see TPACPI_FAN_WR_ACPI_SFAN
5013  *      EC 0x2f (HFSP) not available if GFAN exists
5014  *
5015  * TPACPI_FAN_WR_ACPI_SFAN:
5016  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
5017  *
5018  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
5019  *      it for writing.
5020  *
5021  * TPACPI_FAN_WR_TPEC:
5022  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
5023  *      Supported on almost all ThinkPads
5024  *
5025  *      Fan speed changes of any sort (including those caused by the
5026  *      disengaged mode) are usually done slowly by the firmware as the
5027  *      maximum ammount of fan duty cycle change per second seems to be
5028  *      limited.
5029  *
5030  *      Reading is not available if GFAN exists.
5031  *      Writing is not available if SFAN exists.
5032  *
5033  *      Bits
5034  *       7      automatic mode engaged;
5035  *              (default operation mode of the ThinkPad)
5036  *              fan level is ignored in this mode.
5037  *       6      full speed mode (takes precedence over bit 7);
5038  *              not available on all thinkpads.  May disable
5039  *              the tachometer while the fan controller ramps up
5040  *              the speed (which can take up to a few *minutes*).
5041  *              Speeds up fan to 100% duty-cycle, which is far above
5042  *              the standard RPM levels.  It is not impossible that
5043  *              it could cause hardware damage.
5044  *      5-3     unused in some models.  Extra bits for fan level
5045  *              in others, but still useless as all values above
5046  *              7 map to the same speed as level 7 in these models.
5047  *      2-0     fan level (0..7 usually)
5048  *                      0x00 = stop
5049  *                      0x07 = max (set when temperatures critical)
5050  *              Some ThinkPads may have other levels, see
5051  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5052  *
5053  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5054  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5055  *      does so, its initial value is meaningless (0x07).
5056  *
5057  *      For firmware bugs, refer to:
5058  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5059  *
5060  *      ----
5061  *
5062  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5063  *      Main fan tachometer reading (in RPM)
5064  *
5065  *      This register is present on all ThinkPads with a new-style EC, and
5066  *      it is known not to be present on the A21m/e, and T22, as there is
5067  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5068  *      ThinkPads from this same time period (and earlier) probably lack the
5069  *      tachometer as well.
5070  *
5071  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5072  *      was never fixed by IBM to report the EC firmware version string
5073  *      probably support the tachometer (like the early X models), so
5074  *      detecting it is quite hard.  We need more data to know for sure.
5075  *
5076  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5077  *      might result.
5078  *
5079  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5080  *      mode.
5081  *
5082  *      For firmware bugs, refer to:
5083  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5084  *
5085  * TPACPI_FAN_WR_ACPI_FANS:
5086  *      ThinkPad X31, X40, X41.  Not available in the X60.
5087  *
5088  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5089  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5090  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5091  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5092  *
5093  *      The speeds are stored on handles
5094  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5095  *
5096  *      There are three default speed sets, acessible as handles:
5097  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5098  *
5099  *      ACPI DSDT switches which set is in use depending on various
5100  *      factors.
5101  *
5102  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5103  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5104  *      but the ACPI tables just mention level 7.
5105  */
5106
5107 enum {                                  /* Fan control constants */
5108         fan_status_offset = 0x2f,       /* EC register 0x2f */
5109         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5110                                          * 0x84 must be read before 0x85 */
5111
5112         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5113         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5114
5115         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5116 };
5117
5118 enum fan_status_access_mode {
5119         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5120         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5121         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5122 };
5123
5124 enum fan_control_access_mode {
5125         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5126         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5127         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5128         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5129 };
5130
5131 enum fan_control_commands {
5132         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5133         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5134         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5135                                                  * and also watchdog cmd */
5136 };
5137
5138 static int fan_control_allowed;
5139
5140 static enum fan_status_access_mode fan_status_access_mode;
5141 static enum fan_control_access_mode fan_control_access_mode;
5142 static enum fan_control_commands fan_control_commands;
5143
5144 static u8 fan_control_initial_status;
5145 static u8 fan_control_desired_level;
5146 static int fan_watchdog_maxinterval;
5147
5148 static struct mutex fan_mutex;
5149
5150 static void fan_watchdog_fire(struct work_struct *ignored);
5151 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5152
5153 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5154 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5155            "\\FSPD",            /* 600e/x, 770e, 770x */
5156            );                   /* all others */
5157 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5158            "JFNS",              /* 770x-JL */
5159            );                   /* all others */
5160
5161 /*
5162  * Call with fan_mutex held
5163  */
5164 static void fan_update_desired_level(u8 status)
5165 {
5166         if ((status &
5167              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5168                 if (status > 7)
5169                         fan_control_desired_level = 7;
5170                 else
5171                         fan_control_desired_level = status;
5172         }
5173 }
5174
5175 static int fan_get_status(u8 *status)
5176 {
5177         u8 s;
5178
5179         /* TODO:
5180          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5181
5182         switch (fan_status_access_mode) {
5183         case TPACPI_FAN_RD_ACPI_GFAN:
5184                 /* 570, 600e/x, 770e, 770x */
5185
5186                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5187                         return -EIO;
5188
5189                 if (likely(status))
5190                         *status = s & 0x07;
5191
5192                 break;
5193
5194         case TPACPI_FAN_RD_TPEC:
5195                 /* all except 570, 600e/x, 770e, 770x */
5196                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5197                         return -EIO;
5198
5199                 if (likely(status))
5200                         *status = s;
5201
5202                 break;
5203
5204         default:
5205                 return -ENXIO;
5206         }
5207
5208         return 0;
5209 }
5210
5211 static int fan_get_status_safe(u8 *status)
5212 {
5213         int rc;
5214         u8 s;
5215
5216         if (mutex_lock_interruptible(&fan_mutex))
5217                 return -ERESTARTSYS;
5218         rc = fan_get_status(&s);
5219         if (!rc)
5220                 fan_update_desired_level(s);
5221         mutex_unlock(&fan_mutex);
5222
5223         if (status)
5224                 *status = s;
5225
5226         return rc;
5227 }
5228
5229 static int fan_get_speed(unsigned int *speed)
5230 {
5231         u8 hi, lo;
5232
5233         switch (fan_status_access_mode) {
5234         case TPACPI_FAN_RD_TPEC:
5235                 /* all except 570, 600e/x, 770e, 770x */
5236                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5237                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5238                         return -EIO;
5239
5240                 if (likely(speed))
5241                         *speed = (hi << 8) | lo;
5242
5243                 break;
5244
5245         default:
5246                 return -ENXIO;
5247         }
5248
5249         return 0;
5250 }
5251
5252 static int fan_set_level(int level)
5253 {
5254         if (!fan_control_allowed)
5255                 return -EPERM;
5256
5257         switch (fan_control_access_mode) {
5258         case TPACPI_FAN_WR_ACPI_SFAN:
5259                 if (level >= 0 && level <= 7) {
5260                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5261                                 return -EIO;
5262                 } else
5263                         return -EINVAL;
5264                 break;
5265
5266         case TPACPI_FAN_WR_ACPI_FANS:
5267         case TPACPI_FAN_WR_TPEC:
5268                 if ((level != TP_EC_FAN_AUTO) &&
5269                     (level != TP_EC_FAN_FULLSPEED) &&
5270                     ((level < 0) || (level > 7)))
5271                         return -EINVAL;
5272
5273                 /* safety net should the EC not support AUTO
5274                  * or FULLSPEED mode bits and just ignore them */
5275                 if (level & TP_EC_FAN_FULLSPEED)
5276                         level |= 7;     /* safety min speed 7 */
5277                 else if (level & TP_EC_FAN_AUTO)
5278                         level |= 4;     /* safety min speed 4 */
5279
5280                 if (!acpi_ec_write(fan_status_offset, level))
5281                         return -EIO;
5282                 else
5283                         tp_features.fan_ctrl_status_undef = 0;
5284                 break;
5285
5286         default:
5287                 return -ENXIO;
5288         }
5289         return 0;
5290 }
5291
5292 static int fan_set_level_safe(int level)
5293 {
5294         int rc;
5295
5296         if (!fan_control_allowed)
5297                 return -EPERM;
5298
5299         if (mutex_lock_interruptible(&fan_mutex))
5300                 return -ERESTARTSYS;
5301
5302         if (level == TPACPI_FAN_LAST_LEVEL)
5303                 level = fan_control_desired_level;
5304
5305         rc = fan_set_level(level);
5306         if (!rc)
5307                 fan_update_desired_level(level);
5308
5309         mutex_unlock(&fan_mutex);
5310         return rc;
5311 }
5312
5313 static int fan_set_enable(void)
5314 {
5315         u8 s;
5316         int rc;
5317
5318         if (!fan_control_allowed)
5319                 return -EPERM;
5320
5321         if (mutex_lock_interruptible(&fan_mutex))
5322                 return -ERESTARTSYS;
5323
5324         switch (fan_control_access_mode) {
5325         case TPACPI_FAN_WR_ACPI_FANS:
5326         case TPACPI_FAN_WR_TPEC:
5327                 rc = fan_get_status(&s);
5328                 if (rc < 0)
5329                         break;
5330
5331                 /* Don't go out of emergency fan mode */
5332                 if (s != 7) {
5333                         s &= 0x07;
5334                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5335                 }
5336
5337                 if (!acpi_ec_write(fan_status_offset, s))
5338                         rc = -EIO;
5339                 else {
5340                         tp_features.fan_ctrl_status_undef = 0;
5341                         rc = 0;
5342                 }
5343                 break;
5344
5345         case TPACPI_FAN_WR_ACPI_SFAN:
5346                 rc = fan_get_status(&s);
5347                 if (rc < 0)
5348                         break;
5349
5350                 s &= 0x07;
5351
5352                 /* Set fan to at least level 4 */
5353                 s |= 4;
5354
5355                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5356                         rc = -EIO;
5357                 else
5358                         rc = 0;
5359                 break;
5360
5361         default:
5362                 rc = -ENXIO;
5363         }
5364
5365         mutex_unlock(&fan_mutex);
5366         return rc;
5367 }
5368
5369 static int fan_set_disable(void)
5370 {
5371         int rc;
5372
5373         if (!fan_control_allowed)
5374                 return -EPERM;
5375
5376         if (mutex_lock_interruptible(&fan_mutex))
5377                 return -ERESTARTSYS;
5378
5379         rc = 0;
5380         switch (fan_control_access_mode) {
5381         case TPACPI_FAN_WR_ACPI_FANS:
5382         case TPACPI_FAN_WR_TPEC:
5383                 if (!acpi_ec_write(fan_status_offset, 0x00))
5384                         rc = -EIO;
5385                 else {
5386                         fan_control_desired_level = 0;
5387                         tp_features.fan_ctrl_status_undef = 0;
5388                 }
5389                 break;
5390
5391         case TPACPI_FAN_WR_ACPI_SFAN:
5392                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5393                         rc = -EIO;
5394                 else
5395                         fan_control_desired_level = 0;
5396                 break;
5397
5398         default:
5399                 rc = -ENXIO;
5400         }
5401
5402
5403         mutex_unlock(&fan_mutex);
5404         return rc;
5405 }
5406
5407 static int fan_set_speed(int speed)
5408 {
5409         int rc;
5410
5411         if (!fan_control_allowed)
5412                 return -EPERM;
5413
5414         if (mutex_lock_interruptible(&fan_mutex))
5415                 return -ERESTARTSYS;
5416
5417         rc = 0;
5418         switch (fan_control_access_mode) {
5419         case TPACPI_FAN_WR_ACPI_FANS:
5420                 if (speed >= 0 && speed <= 65535) {
5421                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5422                                         speed, speed, speed))
5423                                 rc = -EIO;
5424                 } else
5425                         rc = -EINVAL;
5426                 break;
5427
5428         default:
5429                 rc = -ENXIO;
5430         }
5431
5432         mutex_unlock(&fan_mutex);
5433         return rc;
5434 }
5435
5436 static void fan_watchdog_reset(void)
5437 {
5438         static int fan_watchdog_active;
5439
5440         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5441                 return;
5442
5443         if (fan_watchdog_active)
5444                 cancel_delayed_work(&fan_watchdog_task);
5445
5446         if (fan_watchdog_maxinterval > 0 &&
5447             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5448                 fan_watchdog_active = 1;
5449                 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task,
5450                                 msecs_to_jiffies(fan_watchdog_maxinterval
5451                                                  * 1000))) {
5452                         printk(TPACPI_ERR
5453                                "failed to queue the fan watchdog, "
5454                                "watchdog will not trigger\n");
5455                 }
5456         } else
5457                 fan_watchdog_active = 0;
5458 }
5459
5460 static void fan_watchdog_fire(struct work_struct *ignored)
5461 {
5462         int rc;
5463
5464         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5465                 return;
5466
5467         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5468         rc = fan_set_enable();
5469         if (rc < 0) {
5470                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5471                         "will try again later...\n", -rc);
5472                 /* reschedule for later */
5473                 fan_watchdog_reset();
5474         }
5475 }
5476
5477 /*
5478  * SYSFS fan layout: hwmon compatible (device)
5479  *
5480  * pwm*_enable:
5481  *      0: "disengaged" mode
5482  *      1: manual mode
5483  *      2: native EC "auto" mode (recommended, hardware default)
5484  *
5485  * pwm*: set speed in manual mode, ignored otherwise.
5486  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5487  *      interpolation.
5488  *
5489  * fan*_input: tachometer reading, RPM
5490  *
5491  *
5492  * SYSFS fan layout: extensions
5493  *
5494  * fan_watchdog (driver):
5495  *      fan watchdog interval in seconds, 0 disables (default), max 120
5496  */
5497
5498 /* sysfs fan pwm1_enable ----------------------------------------------- */
5499 static ssize_t fan_pwm1_enable_show(struct device *dev,
5500                                     struct device_attribute *attr,
5501                                     char *buf)
5502 {
5503         int res, mode;
5504         u8 status;
5505
5506         res = fan_get_status_safe(&status);
5507         if (res)
5508                 return res;
5509
5510         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5511                 if (status != fan_control_initial_status) {
5512                         tp_features.fan_ctrl_status_undef = 0;
5513                 } else {
5514                         /* Return most likely status. In fact, it
5515                          * might be the only possible status */
5516                         status = TP_EC_FAN_AUTO;
5517                 }
5518         }
5519
5520         if (status & TP_EC_FAN_FULLSPEED) {
5521                 mode = 0;
5522         } else if (status & TP_EC_FAN_AUTO) {
5523                 mode = 2;
5524         } else
5525                 mode = 1;
5526
5527         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5528 }
5529
5530 static ssize_t fan_pwm1_enable_store(struct device *dev,
5531                                      struct device_attribute *attr,
5532                                      const char *buf, size_t count)
5533 {
5534         unsigned long t;
5535         int res, level;
5536
5537         if (parse_strtoul(buf, 2, &t))
5538                 return -EINVAL;
5539
5540         switch (t) {
5541         case 0:
5542                 level = TP_EC_FAN_FULLSPEED;
5543                 break;
5544         case 1:
5545                 level = TPACPI_FAN_LAST_LEVEL;
5546                 break;
5547         case 2:
5548                 level = TP_EC_FAN_AUTO;
5549                 break;
5550         case 3:
5551                 /* reserved for software-controlled auto mode */
5552                 return -ENOSYS;
5553         default:
5554                 return -EINVAL;
5555         }
5556
5557         res = fan_set_level_safe(level);
5558         if (res == -ENXIO)
5559                 return -EINVAL;
5560         else if (res < 0)
5561                 return res;
5562
5563         fan_watchdog_reset();
5564
5565         return count;
5566 }
5567
5568 static struct device_attribute dev_attr_fan_pwm1_enable =
5569         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5570                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5571
5572 /* sysfs fan pwm1 ------------------------------------------------------ */
5573 static ssize_t fan_pwm1_show(struct device *dev,
5574                              struct device_attribute *attr,
5575                              char *buf)
5576 {
5577         int res;
5578         u8 status;
5579
5580         res = fan_get_status_safe(&status);
5581         if (res)
5582                 return res;
5583
5584         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5585                 if (status != fan_control_initial_status) {
5586                         tp_features.fan_ctrl_status_undef = 0;
5587                 } else {
5588                         status = TP_EC_FAN_AUTO;
5589                 }
5590         }
5591
5592         if ((status &
5593              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5594                 status = fan_control_desired_level;
5595
5596         if (status > 7)
5597                 status = 7;
5598
5599         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5600 }
5601
5602 static ssize_t fan_pwm1_store(struct device *dev,
5603                               struct device_attribute *attr,
5604                               const char *buf, size_t count)
5605 {
5606         unsigned long s;
5607         int rc;
5608         u8 status, newlevel;
5609
5610         if (parse_strtoul(buf, 255, &s))
5611                 return -EINVAL;
5612
5613         /* scale down from 0-255 to 0-7 */
5614         newlevel = (s >> 5) & 0x07;
5615
5616         if (mutex_lock_interruptible(&fan_mutex))
5617                 return -ERESTARTSYS;
5618
5619         rc = fan_get_status(&status);
5620         if (!rc && (status &
5621                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5622                 rc = fan_set_level(newlevel);
5623                 if (rc == -ENXIO)
5624                         rc = -EINVAL;
5625                 else if (!rc) {
5626                         fan_update_desired_level(newlevel);
5627                         fan_watchdog_reset();
5628                 }
5629         }
5630
5631         mutex_unlock(&fan_mutex);
5632         return (rc)? rc : count;
5633 }
5634
5635 static struct device_attribute dev_attr_fan_pwm1 =
5636         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5637                 fan_pwm1_show, fan_pwm1_store);
5638
5639 /* sysfs fan fan1_input ------------------------------------------------ */
5640 static ssize_t fan_fan1_input_show(struct device *dev,
5641                            struct device_attribute *attr,
5642                            char *buf)
5643 {
5644         int res;
5645         unsigned int speed;
5646
5647         res = fan_get_speed(&speed);
5648         if (res < 0)
5649                 return res;
5650
5651         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5652 }
5653
5654 static struct device_attribute dev_attr_fan_fan1_input =
5655         __ATTR(fan1_input, S_IRUGO,
5656                 fan_fan1_input_show, NULL);
5657
5658 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5659 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5660                                      char *buf)
5661 {
5662         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5663 }
5664
5665 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5666                                       const char *buf, size_t count)
5667 {
5668         unsigned long t;
5669
5670         if (parse_strtoul(buf, 120, &t))
5671                 return -EINVAL;
5672
5673         if (!fan_control_allowed)
5674                 return -EPERM;
5675
5676         fan_watchdog_maxinterval = t;
5677         fan_watchdog_reset();
5678
5679         return count;
5680 }
5681
5682 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5683                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5684
5685 /* --------------------------------------------------------------------- */
5686 static struct attribute *fan_attributes[] = {
5687         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5688         &dev_attr_fan_fan1_input.attr,
5689         NULL
5690 };
5691
5692 static const struct attribute_group fan_attr_group = {
5693         .attrs = fan_attributes,
5694 };
5695
5696 static int __init fan_init(struct ibm_init_struct *iibm)
5697 {
5698         int rc;
5699
5700         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5701
5702         mutex_init(&fan_mutex);
5703         fan_status_access_mode = TPACPI_FAN_NONE;
5704         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5705         fan_control_commands = 0;
5706         fan_watchdog_maxinterval = 0;
5707         tp_features.fan_ctrl_status_undef = 0;
5708         fan_control_desired_level = 7;
5709
5710         TPACPI_ACPIHANDLE_INIT(fans);
5711         TPACPI_ACPIHANDLE_INIT(gfan);
5712         TPACPI_ACPIHANDLE_INIT(sfan);
5713
5714         if (gfan_handle) {
5715                 /* 570, 600e/x, 770e, 770x */
5716                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5717         } else {
5718                 /* all other ThinkPads: note that even old-style
5719                  * ThinkPad ECs supports the fan control register */
5720                 if (likely(acpi_ec_read(fan_status_offset,
5721                                         &fan_control_initial_status))) {
5722                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5723
5724                         /* In some ThinkPads, neither the EC nor the ACPI
5725                          * DSDT initialize the fan status, and it ends up
5726                          * being set to 0x07 when it *could* be either
5727                          * 0x07 or 0x80.
5728                          *
5729                          * Enable for TP-1Y (T43), TP-78 (R51e),
5730                          * TP-76 (R52), TP-70 (T43, R52), which are known
5731                          * to be buggy. */
5732                         if (fan_control_initial_status == 0x07) {
5733                                 switch (thinkpad_id.ec_model) {
5734                                 case 0x5931: /* TP-1Y */
5735                                 case 0x3837: /* TP-78 */
5736                                 case 0x3637: /* TP-76 */
5737                                 case 0x3037: /* TP-70 */
5738                                         printk(TPACPI_NOTICE
5739                                                "fan_init: initial fan status "
5740                                                "is unknown, assuming it is "
5741                                                "in auto mode\n");
5742                                         tp_features.fan_ctrl_status_undef = 1;
5743                                         ;;
5744                                 }
5745                         }
5746                 } else {
5747                         printk(TPACPI_ERR
5748                                "ThinkPad ACPI EC access misbehaving, "
5749                                "fan status and control unavailable\n");
5750                         return 1;
5751                 }
5752         }
5753
5754         if (sfan_handle) {
5755                 /* 570, 770x-JL */
5756                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5757                 fan_control_commands |=
5758                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5759         } else {
5760                 if (!gfan_handle) {
5761                         /* gfan without sfan means no fan control */
5762                         /* all other models implement TP EC 0x2f control */
5763
5764                         if (fans_handle) {
5765                                 /* X31, X40, X41 */
5766                                 fan_control_access_mode =
5767                                     TPACPI_FAN_WR_ACPI_FANS;
5768                                 fan_control_commands |=
5769                                     TPACPI_FAN_CMD_SPEED |
5770                                     TPACPI_FAN_CMD_LEVEL |
5771                                     TPACPI_FAN_CMD_ENABLE;
5772                         } else {
5773                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5774                                 fan_control_commands |=
5775                                     TPACPI_FAN_CMD_LEVEL |
5776                                     TPACPI_FAN_CMD_ENABLE;
5777                         }
5778                 }
5779         }
5780
5781         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5782                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5783                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5784                 fan_status_access_mode, fan_control_access_mode);
5785
5786         /* fan control master switch */
5787         if (!fan_control_allowed) {
5788                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5789                 fan_control_commands = 0;
5790                 dbg_printk(TPACPI_DBG_INIT,
5791                            "fan control features disabled by parameter\n");
5792         }
5793
5794         /* update fan_control_desired_level */
5795         if (fan_status_access_mode != TPACPI_FAN_NONE)
5796                 fan_get_status_safe(NULL);
5797
5798         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5799             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5800                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5801                                          &fan_attr_group);
5802                 if (rc < 0)
5803                         return rc;
5804
5805                 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5806                                         &driver_attr_fan_watchdog);
5807                 if (rc < 0) {
5808                         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
5809                                         &fan_attr_group);
5810                         return rc;
5811                 }
5812                 return 0;
5813         } else
5814                 return 1;
5815 }
5816
5817 static void fan_exit(void)
5818 {
5819         vdbg_printk(TPACPI_DBG_EXIT,
5820                     "cancelling any pending fan watchdog tasks\n");
5821
5822         /* FIXME: can we really do this unconditionally? */
5823         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5824         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5825                            &driver_attr_fan_watchdog);
5826
5827         cancel_delayed_work(&fan_watchdog_task);
5828         flush_workqueue(tpacpi_wq);
5829 }
5830
5831 static int fan_read(char *p)
5832 {
5833         int len = 0;
5834         int rc;
5835         u8 status;
5836         unsigned int speed = 0;
5837
5838         switch (fan_status_access_mode) {
5839         case TPACPI_FAN_RD_ACPI_GFAN:
5840                 /* 570, 600e/x, 770e, 770x */
5841                 rc = fan_get_status_safe(&status);
5842                 if (rc < 0)
5843                         return rc;
5844
5845                 len += sprintf(p + len, "status:\t\t%s\n"
5846                                "level:\t\t%d\n",
5847                                (status != 0) ? "enabled" : "disabled", status);
5848                 break;
5849
5850         case TPACPI_FAN_RD_TPEC:
5851                 /* all except 570, 600e/x, 770e, 770x */
5852                 rc = fan_get_status_safe(&status);
5853                 if (rc < 0)
5854                         return rc;
5855
5856                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5857                         if (status != fan_control_initial_status)
5858                                 tp_features.fan_ctrl_status_undef = 0;
5859                         else
5860                                 /* Return most likely status. In fact, it
5861                                  * might be the only possible status */
5862                                 status = TP_EC_FAN_AUTO;
5863                 }
5864
5865                 len += sprintf(p + len, "status:\t\t%s\n",
5866                                (status != 0) ? "enabled" : "disabled");
5867
5868                 rc = fan_get_speed(&speed);
5869                 if (rc < 0)
5870                         return rc;
5871
5872                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5873
5874                 if (status & TP_EC_FAN_FULLSPEED)
5875                         /* Disengaged mode takes precedence */
5876                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5877                 else if (status & TP_EC_FAN_AUTO)
5878                         len += sprintf(p + len, "level:\t\tauto\n");
5879                 else
5880                         len += sprintf(p + len, "level:\t\t%d\n", status);
5881                 break;
5882
5883         case TPACPI_FAN_NONE:
5884         default:
5885                 len += sprintf(p + len, "status:\t\tnot supported\n");
5886         }
5887
5888         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5889                 len += sprintf(p + len, "commands:\tlevel <level>");
5890
5891                 switch (fan_control_access_mode) {
5892                 case TPACPI_FAN_WR_ACPI_SFAN:
5893                         len += sprintf(p + len, " (<level> is 0-7)\n");
5894                         break;
5895
5896                 default:
5897                         len += sprintf(p + len, " (<level> is 0-7, "
5898                                        "auto, disengaged, full-speed)\n");
5899                         break;
5900                 }
5901         }
5902
5903         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5904                 len += sprintf(p + len, "commands:\tenable, disable\n"
5905                                "commands:\twatchdog <timeout> (<timeout> "
5906                                "is 0 (off), 1-120 (seconds))\n");
5907
5908         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5909                 len += sprintf(p + len, "commands:\tspeed <speed>"
5910                                " (<speed> is 0-65535)\n");
5911
5912         return len;
5913 }
5914
5915 static int fan_write_cmd_level(const char *cmd, int *rc)
5916 {
5917         int level;
5918
5919         if (strlencmp(cmd, "level auto") == 0)
5920                 level = TP_EC_FAN_AUTO;
5921         else if ((strlencmp(cmd, "level disengaged") == 0) |
5922                         (strlencmp(cmd, "level full-speed") == 0))
5923                 level = TP_EC_FAN_FULLSPEED;
5924         else if (sscanf(cmd, "level %d", &level) != 1)
5925                 return 0;
5926
5927         *rc = fan_set_level_safe(level);
5928         if (*rc == -ENXIO)
5929                 printk(TPACPI_ERR "level command accepted for unsupported "
5930                        "access mode %d", fan_control_access_mode);
5931
5932         return 1;
5933 }
5934
5935 static int fan_write_cmd_enable(const char *cmd, int *rc)
5936 {
5937         if (strlencmp(cmd, "enable") != 0)
5938                 return 0;
5939
5940         *rc = fan_set_enable();
5941         if (*rc == -ENXIO)
5942                 printk(TPACPI_ERR "enable command accepted for unsupported "
5943                        "access mode %d", fan_control_access_mode);
5944
5945         return 1;
5946 }
5947
5948 static int fan_write_cmd_disable(const char *cmd, int *rc)
5949 {
5950         if (strlencmp(cmd, "disable") != 0)
5951                 return 0;
5952
5953         *rc = fan_set_disable();
5954         if (*rc == -ENXIO)
5955                 printk(TPACPI_ERR "disable command accepted for unsupported "
5956                        "access mode %d", fan_control_access_mode);
5957
5958         return 1;
5959 }
5960
5961 static int fan_write_cmd_speed(const char *cmd, int *rc)
5962 {
5963         int speed;
5964
5965         /* TODO:
5966          * Support speed <low> <medium> <high> ? */
5967
5968         if (sscanf(cmd, "speed %d", &speed) != 1)
5969                 return 0;
5970
5971         *rc = fan_set_speed(speed);
5972         if (*rc == -ENXIO)
5973                 printk(TPACPI_ERR "speed command accepted for unsupported "
5974                        "access mode %d", fan_control_access_mode);
5975
5976         return 1;
5977 }
5978
5979 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5980 {
5981         int interval;
5982
5983         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5984                 return 0;
5985
5986         if (interval < 0 || interval > 120)
5987                 *rc = -EINVAL;
5988         else
5989                 fan_watchdog_maxinterval = interval;
5990
5991         return 1;
5992 }
5993
5994 static int fan_write(char *buf)
5995 {
5996         char *cmd;
5997         int rc = 0;
5998
5999         while (!rc && (cmd = next_cmd(&buf))) {
6000                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
6001                       fan_write_cmd_level(cmd, &rc)) &&
6002                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
6003                       (fan_write_cmd_enable(cmd, &rc) ||
6004                        fan_write_cmd_disable(cmd, &rc) ||
6005                        fan_write_cmd_watchdog(cmd, &rc))) &&
6006                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
6007                       fan_write_cmd_speed(cmd, &rc))
6008                     )
6009                         rc = -EINVAL;
6010                 else if (!rc)
6011                         fan_watchdog_reset();
6012         }
6013
6014         return rc;
6015 }
6016
6017 static struct ibm_struct fan_driver_data = {
6018         .name = "fan",
6019         .read = fan_read,
6020         .write = fan_write,
6021         .exit = fan_exit,
6022 };
6023
6024 /****************************************************************************
6025  ****************************************************************************
6026  *
6027  * Infrastructure
6028  *
6029  ****************************************************************************
6030  ****************************************************************************/
6031
6032 /* sysfs name ---------------------------------------------------------- */
6033 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
6034                            struct device_attribute *attr,
6035                            char *buf)
6036 {
6037         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
6038 }
6039
6040 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
6041         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
6042
6043 /* --------------------------------------------------------------------- */
6044
6045 /* /proc support */
6046 static struct proc_dir_entry *proc_dir;
6047
6048 /*
6049  * Module and infrastructure proble, init and exit handling
6050  */
6051
6052 static int force_load;
6053
6054 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6055 static const char * __init str_supported(int is_supported)
6056 {
6057         static char text_unsupported[] __initdata = "not supported";
6058
6059         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6060 }
6061 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6062
6063 static void ibm_exit(struct ibm_struct *ibm)
6064 {
6065         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6066
6067         list_del_init(&ibm->all_drivers);
6068
6069         if (ibm->flags.acpi_notify_installed) {
6070                 dbg_printk(TPACPI_DBG_EXIT,
6071                         "%s: acpi_remove_notify_handler\n", ibm->name);
6072                 BUG_ON(!ibm->acpi);
6073                 acpi_remove_notify_handler(*ibm->acpi->handle,
6074                                            ibm->acpi->type,
6075                                            dispatch_acpi_notify);
6076                 ibm->flags.acpi_notify_installed = 0;
6077                 ibm->flags.acpi_notify_installed = 0;
6078         }
6079
6080         if (ibm->flags.proc_created) {
6081                 dbg_printk(TPACPI_DBG_EXIT,
6082                         "%s: remove_proc_entry\n", ibm->name);
6083                 remove_proc_entry(ibm->name, proc_dir);
6084                 ibm->flags.proc_created = 0;
6085         }
6086
6087         if (ibm->flags.acpi_driver_registered) {
6088                 dbg_printk(TPACPI_DBG_EXIT,
6089                         "%s: acpi_bus_unregister_driver\n", ibm->name);
6090                 BUG_ON(!ibm->acpi);
6091                 acpi_bus_unregister_driver(ibm->acpi->driver);
6092                 kfree(ibm->acpi->driver);
6093                 ibm->acpi->driver = NULL;
6094                 ibm->flags.acpi_driver_registered = 0;
6095         }
6096
6097         if (ibm->flags.init_called && ibm->exit) {
6098                 ibm->exit();
6099                 ibm->flags.init_called = 0;
6100         }
6101
6102         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6103 }
6104
6105 static int __init ibm_init(struct ibm_init_struct *iibm)
6106 {
6107         int ret;
6108         struct ibm_struct *ibm = iibm->data;
6109         struct proc_dir_entry *entry;
6110
6111         BUG_ON(ibm == NULL);
6112
6113         INIT_LIST_HEAD(&ibm->all_drivers);
6114
6115         if (ibm->flags.experimental && !experimental)
6116                 return 0;
6117
6118         dbg_printk(TPACPI_DBG_INIT,
6119                 "probing for %s\n", ibm->name);
6120
6121         if (iibm->init) {
6122                 ret = iibm->init(iibm);
6123                 if (ret > 0)
6124                         return 0;       /* probe failed */
6125                 if (ret)
6126                         return ret;
6127
6128                 ibm->flags.init_called = 1;
6129         }
6130
6131         if (ibm->acpi) {
6132                 if (ibm->acpi->hid) {
6133                         ret = register_tpacpi_subdriver(ibm);
6134                         if (ret)
6135                                 goto err_out;
6136                 }
6137
6138                 if (ibm->acpi->notify) {
6139                         ret = setup_acpi_notify(ibm);
6140                         if (ret == -ENODEV) {
6141                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6142                                         ibm->name);
6143                                 ret = 0;
6144                                 goto err_out;
6145                         }
6146                         if (ret < 0)
6147                                 goto err_out;
6148                 }
6149         }
6150
6151         dbg_printk(TPACPI_DBG_INIT,
6152                 "%s installed\n", ibm->name);
6153
6154         if (ibm->read) {
6155                 entry = create_proc_entry(ibm->name,
6156                                           S_IFREG | S_IRUGO | S_IWUSR,
6157                                           proc_dir);
6158                 if (!entry) {
6159                         printk(TPACPI_ERR "unable to create proc entry %s\n",
6160                                ibm->name);
6161                         ret = -ENODEV;
6162                         goto err_out;
6163                 }
6164                 entry->owner = THIS_MODULE;
6165                 entry->data = ibm;
6166                 entry->read_proc = &dispatch_procfs_read;
6167                 if (ibm->write)
6168                         entry->write_proc = &dispatch_procfs_write;
6169                 ibm->flags.proc_created = 1;
6170         }
6171
6172         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6173
6174         return 0;
6175
6176 err_out:
6177         dbg_printk(TPACPI_DBG_INIT,
6178                 "%s: at error exit path with result %d\n",
6179                 ibm->name, ret);
6180
6181         ibm_exit(ibm);
6182         return (ret < 0)? ret : 0;
6183 }
6184
6185 /* Probing */
6186
6187 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
6188 {
6189         const struct dmi_device *dev = NULL;
6190         char ec_fw_string[18];
6191
6192         if (!tp)
6193                 return;
6194
6195         memset(tp, 0, sizeof(*tp));
6196
6197         if (dmi_name_in_vendors("IBM"))
6198                 tp->vendor = PCI_VENDOR_ID_IBM;
6199         else if (dmi_name_in_vendors("LENOVO"))
6200                 tp->vendor = PCI_VENDOR_ID_LENOVO;
6201         else
6202                 return;
6203
6204         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
6205                                         GFP_KERNEL);
6206         if (!tp->bios_version_str)
6207                 return;
6208         tp->bios_model = tp->bios_version_str[0]
6209                          | (tp->bios_version_str[1] << 8);
6210
6211         /*
6212          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
6213          * X32 or newer, all Z series;  Some models must have an
6214          * up-to-date BIOS or they will not be detected.
6215          *
6216          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6217          */
6218         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
6219                 if (sscanf(dev->name,
6220                            "IBM ThinkPad Embedded Controller -[%17c",
6221                            ec_fw_string) == 1) {
6222                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
6223                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
6224
6225                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
6226                         tp->ec_model = ec_fw_string[0]
6227                                         | (ec_fw_string[1] << 8);
6228                         break;
6229                 }
6230         }
6231
6232         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
6233                                         GFP_KERNEL);
6234         if (tp->model_str && strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
6235                 kfree(tp->model_str);
6236                 tp->model_str = NULL;
6237         }
6238
6239         tp->nummodel_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_NAME),
6240                                         GFP_KERNEL);
6241 }
6242
6243 static int __init probe_for_thinkpad(void)
6244 {
6245         int is_thinkpad;
6246
6247         if (acpi_disabled)
6248                 return -ENODEV;
6249
6250         /*
6251          * Non-ancient models have better DMI tagging, but very old models
6252          * don't.
6253          */
6254         is_thinkpad = (thinkpad_id.model_str != NULL);
6255
6256         /* ec is required because many other handles are relative to it */
6257         TPACPI_ACPIHANDLE_INIT(ec);
6258         if (!ec_handle) {
6259                 if (is_thinkpad)
6260                         printk(TPACPI_ERR
6261                                 "Not yet supported ThinkPad detected!\n");
6262                 return -ENODEV;
6263         }
6264
6265         /*
6266          * Risks a regression on very old machines, but reduces potential
6267          * false positives a damn great deal
6268          */
6269         if (!is_thinkpad)
6270                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6271
6272         if (!is_thinkpad && !force_load)
6273                 return -ENODEV;
6274
6275         return 0;
6276 }
6277
6278
6279 /* Module init, exit, parameters */
6280
6281 static struct ibm_init_struct ibms_init[] __initdata = {
6282         {
6283                 .init = thinkpad_acpi_driver_init,
6284                 .data = &thinkpad_acpi_driver_data,
6285         },
6286         {
6287                 .init = hotkey_init,
6288                 .data = &hotkey_driver_data,
6289         },
6290         {
6291                 .init = bluetooth_init,
6292                 .data = &bluetooth_driver_data,
6293         },
6294         {
6295                 .init = wan_init,
6296                 .data = &wan_driver_data,
6297         },
6298 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6299         {
6300                 .init = video_init,
6301                 .data = &video_driver_data,
6302         },
6303 #endif
6304         {
6305                 .init = light_init,
6306                 .data = &light_driver_data,
6307         },
6308 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6309         {
6310                 .init = dock_init,
6311                 .data = &dock_driver_data[0],
6312         },
6313         {
6314                 .init = dock_init2,
6315                 .data = &dock_driver_data[1],
6316         },
6317 #endif
6318 #ifdef CONFIG_THINKPAD_ACPI_BAY
6319         {
6320                 .init = bay_init,
6321                 .data = &bay_driver_data,
6322         },
6323 #endif
6324         {
6325                 .init = cmos_init,
6326                 .data = &cmos_driver_data,
6327         },
6328         {
6329                 .init = led_init,
6330                 .data = &led_driver_data,
6331         },
6332         {
6333                 .init = beep_init,
6334                 .data = &beep_driver_data,
6335         },
6336         {
6337                 .init = thermal_init,
6338                 .data = &thermal_driver_data,
6339         },
6340         {
6341                 .data = &ecdump_driver_data,
6342         },
6343         {
6344                 .init = brightness_init,
6345                 .data = &brightness_driver_data,
6346         },
6347         {
6348                 .data = &volume_driver_data,
6349         },
6350         {
6351                 .init = fan_init,
6352                 .data = &fan_driver_data,
6353         },
6354 };
6355
6356 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6357 {
6358         unsigned int i;
6359         struct ibm_struct *ibm;
6360
6361         if (!kp || !kp->name || !val)
6362                 return -EINVAL;
6363
6364         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6365                 ibm = ibms_init[i].data;
6366                 WARN_ON(ibm == NULL);
6367
6368                 if (!ibm || !ibm->name)
6369                         continue;
6370
6371                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6372                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6373                                 return -ENOSPC;
6374                         strcpy(ibms_init[i].param, val);
6375                         strcat(ibms_init[i].param, ",");
6376                         return 0;
6377                 }
6378         }
6379
6380         return -EINVAL;
6381 }
6382
6383 module_param(experimental, int, 0);
6384 MODULE_PARM_DESC(experimental,
6385                  "Enables experimental features when non-zero");
6386
6387 module_param_named(debug, dbg_level, uint, 0);
6388 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6389
6390 module_param(force_load, bool, 0);
6391 MODULE_PARM_DESC(force_load,
6392                  "Attempts to load the driver even on a "
6393                  "mis-identified ThinkPad when true");
6394
6395 module_param_named(fan_control, fan_control_allowed, bool, 0);
6396 MODULE_PARM_DESC(fan_control,
6397                  "Enables setting fan parameters features when true");
6398
6399 module_param_named(brightness_mode, brightness_mode, int, 0);
6400 MODULE_PARM_DESC(brightness_mode,
6401                  "Selects brightness control strategy: "
6402                  "0=auto, 1=EC, 2=CMOS, 3=both");
6403
6404 module_param(brightness_enable, uint, 0);
6405 MODULE_PARM_DESC(brightness_enable,
6406                  "Enables backlight control when 1, disables when 0");
6407
6408 module_param(hotkey_report_mode, uint, 0);
6409 MODULE_PARM_DESC(hotkey_report_mode,
6410                  "used for backwards compatibility with userspace, "
6411                  "see documentation");
6412
6413 #define TPACPI_PARAM(feature) \
6414         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6415         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6416                          "at module load, see documentation")
6417
6418 TPACPI_PARAM(hotkey);
6419 TPACPI_PARAM(bluetooth);
6420 TPACPI_PARAM(video);
6421 TPACPI_PARAM(light);
6422 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6423 TPACPI_PARAM(dock);
6424 #endif
6425 #ifdef CONFIG_THINKPAD_ACPI_BAY
6426 TPACPI_PARAM(bay);
6427 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6428 TPACPI_PARAM(cmos);
6429 TPACPI_PARAM(led);
6430 TPACPI_PARAM(beep);
6431 TPACPI_PARAM(ecdump);
6432 TPACPI_PARAM(brightness);
6433 TPACPI_PARAM(volume);
6434 TPACPI_PARAM(fan);
6435
6436 static void thinkpad_acpi_module_exit(void)
6437 {
6438         struct ibm_struct *ibm, *itmp;
6439
6440         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6441
6442         list_for_each_entry_safe_reverse(ibm, itmp,
6443                                          &tpacpi_all_drivers,
6444                                          all_drivers) {
6445                 ibm_exit(ibm);
6446         }
6447
6448         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6449
6450         if (tpacpi_inputdev) {
6451                 if (tp_features.input_device_registered)
6452                         input_unregister_device(tpacpi_inputdev);
6453                 else
6454                         input_free_device(tpacpi_inputdev);
6455         }
6456
6457         if (tpacpi_hwmon)
6458                 hwmon_device_unregister(tpacpi_hwmon);
6459
6460         if (tp_features.sensors_pdev_attrs_registered)
6461                 device_remove_file(&tpacpi_sensors_pdev->dev,
6462                                    &dev_attr_thinkpad_acpi_pdev_name);
6463         if (tpacpi_sensors_pdev)
6464                 platform_device_unregister(tpacpi_sensors_pdev);
6465         if (tpacpi_pdev)
6466                 platform_device_unregister(tpacpi_pdev);
6467
6468         if (tp_features.sensors_pdrv_attrs_registered)
6469                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6470         if (tp_features.platform_drv_attrs_registered)
6471                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6472
6473         if (tp_features.sensors_pdrv_registered)
6474                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6475
6476         if (tp_features.platform_drv_registered)
6477                 platform_driver_unregister(&tpacpi_pdriver);
6478
6479         if (proc_dir)
6480                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6481
6482         if (tpacpi_wq)
6483                 destroy_workqueue(tpacpi_wq);
6484
6485         kfree(thinkpad_id.bios_version_str);
6486         kfree(thinkpad_id.ec_version_str);
6487         kfree(thinkpad_id.model_str);
6488 }
6489
6490
6491 static int __init thinkpad_acpi_module_init(void)
6492 {
6493         int ret, i;
6494
6495         tpacpi_lifecycle = TPACPI_LIFE_INIT;
6496
6497         /* Parameter checking */
6498         if (hotkey_report_mode > 2)
6499                 return -EINVAL;
6500
6501         /* Driver-level probe */
6502
6503         get_thinkpad_model_data(&thinkpad_id);
6504         ret = probe_for_thinkpad();
6505         if (ret) {
6506                 thinkpad_acpi_module_exit();
6507                 return ret;
6508         }
6509
6510         /* Driver initialization */
6511
6512         TPACPI_ACPIHANDLE_INIT(ecrd);
6513         TPACPI_ACPIHANDLE_INIT(ecwr);
6514
6515         tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME);
6516         if (!tpacpi_wq) {
6517                 thinkpad_acpi_module_exit();
6518                 return -ENOMEM;
6519         }
6520
6521         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6522         if (!proc_dir) {
6523                 printk(TPACPI_ERR
6524                        "unable to create proc dir " TPACPI_PROC_DIR);
6525                 thinkpad_acpi_module_exit();
6526                 return -ENODEV;
6527         }
6528         proc_dir->owner = THIS_MODULE;
6529
6530         ret = platform_driver_register(&tpacpi_pdriver);
6531         if (ret) {
6532                 printk(TPACPI_ERR
6533                        "unable to register main platform driver\n");
6534                 thinkpad_acpi_module_exit();
6535                 return ret;
6536         }
6537         tp_features.platform_drv_registered = 1;
6538
6539         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6540         if (ret) {
6541                 printk(TPACPI_ERR
6542                        "unable to register hwmon platform driver\n");
6543                 thinkpad_acpi_module_exit();
6544                 return ret;
6545         }
6546         tp_features.sensors_pdrv_registered = 1;
6547
6548         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6549         if (!ret) {
6550                 tp_features.platform_drv_attrs_registered = 1;
6551                 ret = tpacpi_create_driver_attributes(
6552                                         &tpacpi_hwmon_pdriver.driver);
6553         }
6554         if (ret) {
6555                 printk(TPACPI_ERR
6556                        "unable to create sysfs driver attributes\n");
6557                 thinkpad_acpi_module_exit();
6558                 return ret;
6559         }
6560         tp_features.sensors_pdrv_attrs_registered = 1;
6561
6562
6563         /* Device initialization */
6564         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6565                                                         NULL, 0);
6566         if (IS_ERR(tpacpi_pdev)) {
6567                 ret = PTR_ERR(tpacpi_pdev);
6568                 tpacpi_pdev = NULL;
6569                 printk(TPACPI_ERR "unable to register platform device\n");
6570                 thinkpad_acpi_module_exit();
6571                 return ret;
6572         }
6573         tpacpi_sensors_pdev = platform_device_register_simple(
6574                                                 TPACPI_HWMON_DRVR_NAME,
6575                                                 -1, NULL, 0);
6576         if (IS_ERR(tpacpi_sensors_pdev)) {
6577                 ret = PTR_ERR(tpacpi_sensors_pdev);
6578                 tpacpi_sensors_pdev = NULL;
6579                 printk(TPACPI_ERR
6580                        "unable to register hwmon platform device\n");
6581                 thinkpad_acpi_module_exit();
6582                 return ret;
6583         }
6584         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6585                                  &dev_attr_thinkpad_acpi_pdev_name);
6586         if (ret) {
6587                 printk(TPACPI_ERR
6588                        "unable to create sysfs hwmon device attributes\n");
6589                 thinkpad_acpi_module_exit();
6590                 return ret;
6591         }
6592         tp_features.sensors_pdev_attrs_registered = 1;
6593         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6594         if (IS_ERR(tpacpi_hwmon)) {
6595                 ret = PTR_ERR(tpacpi_hwmon);
6596                 tpacpi_hwmon = NULL;
6597                 printk(TPACPI_ERR "unable to register hwmon device\n");
6598                 thinkpad_acpi_module_exit();
6599                 return ret;
6600         }
6601         mutex_init(&tpacpi_inputdev_send_mutex);
6602         tpacpi_inputdev = input_allocate_device();
6603         if (!tpacpi_inputdev) {
6604                 printk(TPACPI_ERR "unable to allocate input device\n");
6605                 thinkpad_acpi_module_exit();
6606                 return -ENOMEM;
6607         } else {
6608                 /* Prepare input device, but don't register */
6609                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6610                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6611                 tpacpi_inputdev->id.bustype = BUS_HOST;
6612                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6613                                                 thinkpad_id.vendor :
6614                                                 PCI_VENDOR_ID_IBM;
6615                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6616                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6617         }
6618         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6619                 ret = ibm_init(&ibms_init[i]);
6620                 if (ret >= 0 && *ibms_init[i].param)
6621                         ret = ibms_init[i].data->write(ibms_init[i].param);
6622                 if (ret < 0) {
6623                         thinkpad_acpi_module_exit();
6624                         return ret;
6625                 }
6626         }
6627         ret = input_register_device(tpacpi_inputdev);
6628         if (ret < 0) {
6629                 printk(TPACPI_ERR "unable to register input device\n");
6630                 thinkpad_acpi_module_exit();
6631                 return ret;
6632         } else {
6633                 tp_features.input_device_registered = 1;
6634         }
6635
6636         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6637         return 0;
6638 }
6639
6640 /* Please remove this in year 2009 */
6641 MODULE_ALIAS("ibm_acpi");
6642
6643 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
6644
6645 /*
6646  * DMI matching for module autoloading
6647  *
6648  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6649  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6650  *
6651  * Only models listed in thinkwiki will be supported, so add yours
6652  * if it is not there yet.
6653  */
6654 #define IBM_BIOS_MODULE_ALIAS(__type) \
6655         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6656
6657 /* Non-ancient thinkpads */
6658 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6659 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6660
6661 /* Ancient thinkpad BIOSes have to be identified by
6662  * BIOS type or model number, and there are far less
6663  * BIOS types than model numbers... */
6664 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6665 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6666 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6667
6668 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6669 MODULE_DESCRIPTION(TPACPI_DESC);
6670 MODULE_VERSION(TPACPI_VERSION);
6671 MODULE_LICENSE("GPL");
6672
6673 module_init(thinkpad_acpi_module_init);
6674 module_exit(thinkpad_acpi_module_exit);