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 "0.19"
  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
 144 #define TPACPI_MAX_ACPI_ARGS 3
 145
 146 /* Debugging */
 147 #define TPACPI_LOG TPACPI_FILE ": "
 148 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 149 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 150 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 151 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 152
 153 #define TPACPI_DBG_ALL          0xffff
 154 #define TPACPI_DBG_ALL          0xffff
 155 #define TPACPI_DBG_INIT         0x0001
 156 #define TPACPI_DBG_EXIT         0x0002
 157 #define dbg_printk(a_dbg_level, format, arg...) \
 158         do { if (dbg_level & a_dbg_level) \
 159                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 160         } while (0)
 161 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 162 #define vdbg_printk(a_dbg_level, format, arg...) \
 163         dbg_printk(a_dbg_level, format, ## arg)
 164 static const char *str_supported(int is_supported);
 165 #else
 166 #define vdbg_printk(a_dbg_level, format, arg...)
 167 #endif
 168
 169 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 170 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 171 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 172
 173
 174 /****************************************************************************
 175  * Driver-wide structs and misc. variables
 176  */
 177
 178 struct ibm_struct;
 179
 180 struct tp_acpi_drv_struct {
 181         const struct acpi_device_id *hid;
 182         struct acpi_driver *driver;
 183
 184         void (*notify) (struct ibm_struct *, u32);
 185         acpi_handle *handle;
 186         u32 type;
 187         struct acpi_device *device;
 188 };
 189
 190 struct ibm_struct {
 191         char *name;
 192
 193         int (*read) (char *);
 194         int (*write) (char *);
 195         void (*exit) (void);
 196         void (*resume) (void);
 197         void (*suspend) (pm_message_t state);
 198
 199         struct list_head all_drivers;
 200
 201         struct tp_acpi_drv_struct *acpi;
 202
 203         struct {
 204                 u8 acpi_driver_registered:1;
 205                 u8 acpi_notify_installed:1;
 206                 u8 proc_created:1;
 207                 u8 init_called:1;
 208                 u8 experimental:1;
 209         } flags;
 210 };
 211
 212 struct ibm_init_struct {
 213         char param[32];
 214
 215         int (*init) (struct ibm_init_struct *);
 216         struct ibm_struct *data;
 217 };
 218
 219 static struct {
 220 #ifdef CONFIG_THINKPAD_ACPI_BAY
 221         u32 bay_status:1;
 222         u32 bay_eject:1;
 223         u32 bay_status2:1;
 224         u32 bay_eject2:1;
 225 #endif
 226         u32 bluetooth:1;
 227         u32 hotkey:1;
 228         u32 hotkey_mask:1;
 229         u32 hotkey_wlsw:1;
 230         u32 hotkey_tablet:1;
 231         u32 light:1;
 232         u32 light_status:1;
 233         u32 bright_16levels:1;
 234         u32 bright_acpimode:1;
 235         u32 wan:1;
 236         u32 fan_ctrl_status_undef:1;
 237         u32 input_device_registered:1;
 238         u32 platform_drv_registered:1;
 239         u32 platform_drv_attrs_registered:1;
 240         u32 sensors_pdrv_registered:1;
 241         u32 sensors_pdrv_attrs_registered:1;
 242         u32 sensors_pdev_attrs_registered:1;
 243         u32 hotkey_poll_active:1;
 244 } tp_features;
 245
 246 static struct {
 247         u16 hotkey_mask_ff:1;
 248         u16 bright_cmos_ec_unsync:1;
 249 } tp_warned;
 250
 251 struct thinkpad_id_data {
 252         unsigned int vendor;    /* ThinkPad vendor:
 253                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 254
 255         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 256         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 257
 258         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 259         u16 ec_model;
 260
 261         char *model_str;        /* ThinkPad T43 */
 262         char *nummodel_str;     /* 9384A9C for a 9384-A9C model */
 263 };
 264 static struct thinkpad_id_data thinkpad_id;
 265
 266 static enum {
 267         TPACPI_LIFE_INIT = 0,
 268         TPACPI_LIFE_RUNNING,
 269         TPACPI_LIFE_EXITING,
 270 } tpacpi_lifecycle;
 271
 272 static int experimental;
 273 static u32 dbg_level;
 274
 275 /* Special LED class that can defer work */
 276 struct tpacpi_led_classdev {
 277         struct led_classdev led_classdev;
 278         struct work_struct work;
 279         enum led_brightness new_brightness;
 280         unsigned int led;
 281 };
 282
 283 /****************************************************************************
 284  ****************************************************************************
 285  *
 286  * ACPI Helpers and device model
 287  *
 288  ****************************************************************************
 289  ****************************************************************************/
 290
 291 /*************************************************************************
 292  * ACPI basic handles
 293  */
 294
 295 static acpi_handle root_handle;
 296
 297 #define TPACPI_HANDLE(object, parent, paths...)                 \
 298         static acpi_handle  object##_handle;                    \
 299         static acpi_handle *object##_parent = &parent##_handle; \
 300         static char        *object##_path;                      \
 301         static char        *object##_paths[] = { paths }
 302
 303 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 304            "\\_SB.PCI.ISA.EC",  /* 570 */
 305            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 306            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 307            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 308            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 309            "\\_SB.PCI0.LPC.EC", /* all others */
 310            );
 311
 312 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 313 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 314
 315 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 316                                         /* T4x, X31, X40 */
 317            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 318            "\\CMS",             /* R40, R40e */
 319            );                   /* all others */
 320
 321 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 322            "^HKEY",             /* R30, R31 */
 323            "HKEY",              /* all others */
 324            );                   /* 570 */
 325
 326 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 327            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 328            "\\_SB.PCI0.VID0",   /* 770e */
 329            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 330            "\\_SB.PCI0.AGP.VID",        /* all others */
 331            );                           /* R30, R31 */
 332
 333
 334 /*************************************************************************
 335  * ACPI helpers
 336  */
 337
 338 static int acpi_evalf(acpi_handle handle,
 339                       void *res, char *method, char *fmt, ...)
 340 {
 341         char *fmt0 = fmt;
 342         struct acpi_object_list params;
 343         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 344         struct acpi_buffer result, *resultp;
 345         union acpi_object out_obj;
 346         acpi_status status;
 347         va_list ap;
 348         char res_type;
 349         int success;
 350         int quiet;
 351
 352         if (!*fmt) {
 353                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 354                 return 0;
 355         }
 356
 357         if (*fmt == 'q') {
 358                 quiet = 1;
 359                 fmt++;
 360         } else
 361                 quiet = 0;
 362
 363         res_type = *(fmt++);
 364
 365         params.count = 0;
 366         params.pointer = &in_objs[0];
 367
 368         va_start(ap, fmt);
 369         while (*fmt) {
 370                 char c = *(fmt++);
 371                 switch (c) {
 372                 case 'd':       /* int */
 373                         in_objs[params.count].integer.value = va_arg(ap, int);
 374                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 375                         break;
 376                         /* add more types as needed */
 377                 default:
 378                         printk(TPACPI_ERR "acpi_evalf() called "
 379                                "with invalid format character '%c'\n", c);
 380                         return 0;
 381                 }
 382         }
 383         va_end(ap);
 384
 385         if (res_type != 'v') {
 386                 result.length = sizeof(out_obj);
 387                 result.pointer = &out_obj;
 388                 resultp = &result;
 389         } else
 390                 resultp = NULL;
 391
 392         status = acpi_evaluate_object(handle, method, &params, resultp);
 393
 394         switch (res_type) {
 395         case 'd':               /* int */
 396                 if (res)
 397                         *(int *)res = out_obj.integer.value;
 398                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 399                 break;
 400         case 'v':               /* void */
 401                 success = status == AE_OK;
 402                 break;
 403                 /* add more types as needed */
 404         default:
 405                 printk(TPACPI_ERR "acpi_evalf() called "
 406                        "with invalid format character '%c'\n", res_type);
 407                 return 0;
 408         }
 409
 410         if (!success && !quiet)
 411                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 412                        method, fmt0, status);
 413
 414         return success;
 415 }
 416
 417 static int acpi_ec_read(int i, u8 *p)
 418 {
 419         int v;
 420
 421         if (ecrd_handle) {
 422                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 423                         return 0;
 424                 *p = v;
 425         } else {
 426                 if (ec_read(i, p) < 0)
 427                         return 0;
 428         }
 429
 430         return 1;
 431 }
 432
 433 static int acpi_ec_write(int i, u8 v)
 434 {
 435         if (ecwr_handle) {
 436                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 437                         return 0;
 438         } else {
 439                 if (ec_write(i, v) < 0)
 440                         return 0;
 441         }
 442
 443         return 1;
 444 }
 445
 446 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 447 static int _sta(acpi_handle handle)
 448 {
 449         int status;
 450
 451         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 452                 status = 0;
 453
 454         return status;
 455 }
 456 #endif
 457
 458 static int issue_thinkpad_cmos_command(int cmos_cmd)
 459 {
 460         if (!cmos_handle)
 461                 return -ENXIO;
 462
 463         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 464                 return -EIO;
 465
 466         return 0;
 467 }
 468
 469 /*************************************************************************
 470  * ACPI device model
 471  */
 472
 473 #define TPACPI_ACPIHANDLE_INIT(object) \
 474         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 475                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 476
 477 static void drv_acpi_handle_init(char *name,
 478                            acpi_handle *handle, acpi_handle parent,
 479                            char **paths, int num_paths, char **path)
 480 {
 481         int i;
 482         acpi_status status;
 483
 484         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 485                 name);
 486
 487         for (i = 0; i < num_paths; i++) {
 488                 status = acpi_get_handle(parent, paths[i], handle);
 489                 if (ACPI_SUCCESS(status)) {
 490                         *path = paths[i];
 491                         dbg_printk(TPACPI_DBG_INIT,
 492                                    "Found ACPI handle %s for %s\n",
 493                                    *path, name);
 494                         return;
 495                 }
 496         }
 497
 498         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 499                     name);
 500         *handle = NULL;
 501 }
 502
 503 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 504 {
 505         struct ibm_struct *ibm = data;
 506
 507         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 508                 return;
 509
 510         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 511                 return;
 512
 513         ibm->acpi->notify(ibm, event);
 514 }
 515
 516 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 517 {
 518         acpi_status status;
 519         int rc;
 520
 521         BUG_ON(!ibm->acpi);
 522
 523         if (!*ibm->acpi->handle)
 524                 return 0;
 525
 526         vdbg_printk(TPACPI_DBG_INIT,
 527                 "setting up ACPI notify for %s\n", ibm->name);
 528
 529         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 530         if (rc < 0) {
 531                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 532                         ibm->name, rc);
 533                 return -ENODEV;
 534         }
 535
 536         acpi_driver_data(ibm->acpi->device) = ibm;
 537         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 538                 TPACPI_ACPI_EVENT_PREFIX,
 539                 ibm->name);
 540
 541         status = acpi_install_notify_handler(*ibm->acpi->handle,
 542                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 543         if (ACPI_FAILURE(status)) {
 544                 if (status == AE_ALREADY_EXISTS) {
 545                         printk(TPACPI_NOTICE
 546                                "another device driver is already "
 547                                "handling %s events\n", ibm->name);
 548                 } else {
 549                         printk(TPACPI_ERR
 550                                "acpi_install_notify_handler(%s) failed: %d\n",
 551                                ibm->name, status);
 552                 }
 553                 return -ENODEV;
 554         }
 555         ibm->flags.acpi_notify_installed = 1;
 556         return 0;
 557 }
 558
 559 static int __init tpacpi_device_add(struct acpi_device *device)
 560 {
 561         return 0;
 562 }
 563
 564 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 565 {
 566         int rc;
 567
 568         dbg_printk(TPACPI_DBG_INIT,
 569                 "registering %s as an ACPI driver\n", ibm->name);
 570
 571         BUG_ON(!ibm->acpi);
 572
 573         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 574         if (!ibm->acpi->driver) {
 575                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
 576                 return -ENOMEM;
 577         }
 578
 579         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 580         ibm->acpi->driver->ids = ibm->acpi->hid;
 581
 582         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 583
 584         rc = acpi_bus_register_driver(ibm->acpi->driver);
 585         if (rc < 0) {
 586                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 587                        ibm->name, rc);
 588                 kfree(ibm->acpi->driver);
 589                 ibm->acpi->driver = NULL;
 590         } else if (!rc)
 591                 ibm->flags.acpi_driver_registered = 1;
 592
 593         return rc;
 594 }
 595
 596
 597 /****************************************************************************
 598  ****************************************************************************
 599  *
 600  * Procfs Helpers
 601  *
 602  ****************************************************************************
 603  ****************************************************************************/
 604
 605 static int dispatch_procfs_read(char *page, char **start, off_t off,
 606                         int count, int *eof, void *data)
 607 {
 608         struct ibm_struct *ibm = data;
 609         int len;
 610
 611         if (!ibm || !ibm->read)
 612                 return -EINVAL;
 613
 614         len = ibm->read(page);
 615         if (len < 0)
 616                 return len;
 617
 618         if (len <= off + count)
 619                 *eof = 1;
 620         *start = page + off;
 621         len -= off;
 622         if (len > count)
 623                 len = count;
 624         if (len < 0)
 625                 len = 0;
 626
 627         return len;
 628 }
 629
 630 static int dispatch_procfs_write(struct file *file,
 631                         const char __user *userbuf,
 632                         unsigned long count, void *data)
 633 {
 634         struct ibm_struct *ibm = data;
 635         char *kernbuf;
 636         int ret;
 637
 638         if (!ibm || !ibm->write)
 639                 return -EINVAL;
 640
 641         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 642         if (!kernbuf)
 643                 return -ENOMEM;
 644
 645         if (copy_from_user(kernbuf, userbuf, count)) {
 646                 kfree(kernbuf);
 647                 return -EFAULT;
 648         }
 649
 650         kernbuf[count] = 0;
 651         strcat(kernbuf, ",");
 652         ret = ibm->write(kernbuf);
 653         if (ret == 0)
 654                 ret = count;
 655
 656         kfree(kernbuf);
 657
 658         return ret;
 659 }
 660
 661 static char *next_cmd(char **cmds)
 662 {
 663         char *start = *cmds;
 664         char *end;
 665
 666         while ((end = strchr(start, ',')) && end == start)
 667                 start = end + 1;
 668
 669         if (!end)
 670                 return NULL;
 671
 672         *end = 0;
 673         *cmds = end + 1;
 674         return start;
 675 }
 676
 677
 678 /****************************************************************************
 679  ****************************************************************************
 680  *
 681  * Device model: input, hwmon and platform
 682  *
 683  ****************************************************************************
 684  ****************************************************************************/
 685
 686 static struct platform_device *tpacpi_pdev;
 687 static struct platform_device *tpacpi_sensors_pdev;
 688 static struct device *tpacpi_hwmon;
 689 static struct input_dev *tpacpi_inputdev;
 690 static struct mutex tpacpi_inputdev_send_mutex;
 691 static LIST_HEAD(tpacpi_all_drivers);
 692
 693 static int tpacpi_suspend_handler(struct platform_device *pdev,
 694                                   pm_message_t state)
 695 {
 696         struct ibm_struct *ibm, *itmp;
 697
 698         list_for_each_entry_safe(ibm, itmp,
 699                                  &tpacpi_all_drivers,
 700                                  all_drivers) {
 701                 if (ibm->suspend)
 702                         (ibm->suspend)(state);
 703         }
 704
 705         return 0;
 706 }
 707
 708 static int tpacpi_resume_handler(struct platform_device *pdev)
 709 {
 710         struct ibm_struct *ibm, *itmp;
 711
 712         list_for_each_entry_safe(ibm, itmp,
 713                                  &tpacpi_all_drivers,
 714                                  all_drivers) {
 715                 if (ibm->resume)
 716                         (ibm->resume)();
 717         }
 718
 719         return 0;
 720 }
 721
 722 static struct platform_driver tpacpi_pdriver = {
 723         .driver = {
 724                 .name = TPACPI_DRVR_NAME,
 725                 .owner = THIS_MODULE,
 726         },
 727         .suspend = tpacpi_suspend_handler,
 728         .resume = tpacpi_resume_handler,
 729 };
 730
 731 static struct platform_driver tpacpi_hwmon_pdriver = {
 732         .driver = {
 733                 .name = TPACPI_HWMON_DRVR_NAME,
 734                 .owner = THIS_MODULE,
 735         },
 736 };
 737
 738 /*************************************************************************
 739  * sysfs support helpers
 740  */
 741
 742 struct attribute_set {
 743         unsigned int members, max_members;
 744         struct attribute_group group;
 745 };
 746
 747 struct attribute_set_obj {
 748         struct attribute_set s;
 749         struct attribute *a;
 750 } __attribute__((packed));
 751
 752 static struct attribute_set *create_attr_set(unsigned int max_members,
 753                                                 const char *name)
 754 {
 755         struct attribute_set_obj *sobj;
 756
 757         if (max_members == 0)
 758                 return NULL;
 759
 760         /* Allocates space for implicit NULL at the end too */
 761         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 762                     max_members * sizeof(struct attribute *),
 763                     GFP_KERNEL);
 764         if (!sobj)
 765                 return NULL;
 766         sobj->s.max_members = max_members;
 767         sobj->s.group.attrs = &sobj->a;
 768         sobj->s.group.name = name;
 769
 770         return &sobj->s;
 771 }
 772
 773 #define destroy_attr_set(_set) \
 774         kfree(_set);
 775
 776 /* not multi-threaded safe, use it in a single thread per set */
 777 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 778 {
 779         if (!s || !attr)
 780                 return -EINVAL;
 781
 782         if (s->members >= s->max_members)
 783                 return -ENOMEM;
 784
 785         s->group.attrs[s->members] = attr;
 786         s->members++;
 787
 788         return 0;
 789 }
 790
 791 static int add_many_to_attr_set(struct attribute_set *s,
 792                         struct attribute **attr,
 793                         unsigned int count)
 794 {
 795         int i, res;
 796
 797         for (i = 0; i < count; i++) {
 798                 res = add_to_attr_set(s, attr[i]);
 799                 if (res)
 800                         return res;
 801         }
 802
 803         return 0;
 804 }
 805
 806 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 807 {
 808         sysfs_remove_group(kobj, &s->group);
 809         destroy_attr_set(s);
 810 }
 811
 812 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 813         sysfs_create_group(_kobj, &_attr_set->group)
 814
 815 static int parse_strtoul(const char *buf,
 816                 unsigned long max, unsigned long *value)
 817 {
 818         char *endp;
 819
 820         while (*buf && isspace(*buf))
 821                 buf++;
 822         *value = simple_strtoul(buf, &endp, 0);
 823         while (*endp && isspace(*endp))
 824                 endp++;
 825         if (*endp || *value > max)
 826                 return -EINVAL;
 827
 828         return 0;
 829 }
 830
 831 static int __init tpacpi_query_bcl_levels(acpi_handle handle)
 832 {
 833         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 834         union acpi_object *obj;
 835         int rc;
 836
 837         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
 838                 obj = (union acpi_object *)buffer.pointer;
 839                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
 840                         printk(TPACPI_ERR "Unknown _BCL data, "
 841                                "please report this to %s\n", TPACPI_MAIL);
 842                         rc = 0;
 843                 } else {
 844                         rc = obj->package.count;
 845                 }
 846         } else {
 847                 return 0;
 848         }
 849
 850         kfree(buffer.pointer);
 851         return rc;
 852 }
 853
 854 static acpi_status __init tpacpi_acpi_walk_find_bcl(acpi_handle handle,
 855                                         u32 lvl, void *context, void **rv)
 856 {
 857         char name[ACPI_PATH_SEGMENT_LENGTH];
 858         struct acpi_buffer buffer = { sizeof(name), &name };
 859
 860         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
 861             !strncmp("_BCL", name, sizeof(name) - 1)) {
 862                 BUG_ON(!rv || !*rv);
 863                 **(int **)rv = tpacpi_query_bcl_levels(handle);
 864                 return AE_CTRL_TERMINATE;
 865         } else {
 866                 return AE_OK;
 867         }
 868 }
 869
 870 /*
 871  * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map
 872  */
 873 static int __init tpacpi_check_std_acpi_brightness_support(void)
 874 {
 875         int status;
 876         int bcl_levels = 0;
 877         void *bcl_ptr = &bcl_levels;
 878
 879         if (!vid_handle) {
 880                 TPACPI_ACPIHANDLE_INIT(vid);
 881         }
 882         if (!vid_handle)
 883                 return 0;
 884
 885         /*
 886          * Search for a _BCL method, and execute it.  This is safe on all
 887          * ThinkPads, and as a side-effect, _BCL will place a Lenovo Vista
 888          * BIOS in ACPI backlight control mode.  We do NOT have to care
 889          * about calling the _BCL method in an enabled video device, any
 890          * will do for our purposes.
 891          */
 892
 893         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
 894                                      tpacpi_acpi_walk_find_bcl, NULL,
 895                                      &bcl_ptr);
 896
 897         if (ACPI_SUCCESS(status) && bcl_levels > 2) {
 898                 tp_features.bright_acpimode = 1;
 899                 return (bcl_levels - 2);
 900         }
 901
 902         return 0;
 903 }
 904
 905 /*************************************************************************
 906  * thinkpad-acpi driver attributes
 907  */
 908
 909 /* interface_version --------------------------------------------------- */
 910 static ssize_t tpacpi_driver_interface_version_show(
 911                                 struct device_driver *drv,
 912                                 char *buf)
 913 {
 914         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 915 }
 916
 917 static DRIVER_ATTR(interface_version, S_IRUGO,
 918                 tpacpi_driver_interface_version_show, NULL);
 919
 920 /* debug_level --------------------------------------------------------- */
 921 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 922                                                 char *buf)
 923 {
 924         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 925 }
 926
 927 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 928                                                 const char *buf, size_t count)
 929 {
 930         unsigned long t;
 931
 932         if (parse_strtoul(buf, 0xffff, &t))
 933                 return -EINVAL;
 934
 935         dbg_level = t;
 936
 937         return count;
 938 }
 939
 940 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 941                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 942
 943 /* version ------------------------------------------------------------- */
 944 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 945                                                 char *buf)
 946 {
 947         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
 948                         TPACPI_DESC, TPACPI_VERSION);
 949 }
 950
 951 static DRIVER_ATTR(version, S_IRUGO,
 952                 tpacpi_driver_version_show, NULL);
 953
 954 /* --------------------------------------------------------------------- */
 955
 956 static struct driver_attribute *tpacpi_driver_attributes[] = {
 957         &driver_attr_debug_level, &driver_attr_version,
 958         &driver_attr_interface_version,
 959 };
 960
 961 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 962 {
 963         int i, res;
 964
 965         i = 0;
 966         res = 0;
 967         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 968                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 969                 i++;
 970         }
 971
 972         return res;
 973 }
 974
 975 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 976 {
 977         int i;
 978
 979         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 980                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 981 }
 982
 983 /****************************************************************************
 984  ****************************************************************************
 985  *
 986  * Subdrivers
 987  *
 988  ****************************************************************************
 989  ****************************************************************************/
 990
 991 /*************************************************************************
 992  * thinkpad-acpi init subdriver
 993  */
 994
 995 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 996 {
 997         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
 998         printk(TPACPI_INFO "%s\n", TPACPI_URL);
 999
1000         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
1001                 (thinkpad_id.bios_version_str) ?
1002                         thinkpad_id.bios_version_str : "unknown",
1003                 (thinkpad_id.ec_version_str) ?
1004                         thinkpad_id.ec_version_str : "unknown");
1005
1006         if (thinkpad_id.vendor && thinkpad_id.model_str)
1007                 printk(TPACPI_INFO "%s %s, model %s\n",
1008                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
1009                                 "IBM" : ((thinkpad_id.vendor ==
1010                                                 PCI_VENDOR_ID_LENOVO) ?
1011                                         "Lenovo" : "Unknown vendor"),
1012                         thinkpad_id.model_str,
1013                         (thinkpad_id.nummodel_str) ?
1014                                 thinkpad_id.nummodel_str : "unknown");
1015
1016         return 0;
1017 }
1018
1019 static int thinkpad_acpi_driver_read(char *p)
1020 {
1021         int len = 0;
1022
1023         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
1024         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
1025
1026         return len;
1027 }
1028
1029 static struct ibm_struct thinkpad_acpi_driver_data = {
1030         .name = "driver",
1031         .read = thinkpad_acpi_driver_read,
1032 };
1033
1034 /*************************************************************************
1035  * Hotkey subdriver
1036  */
1037
1038 enum {  /* hot key scan codes (derived from ACPI DSDT) */
1039         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
1040         TP_ACPI_HOTKEYSCAN_FNF2,
1041         TP_ACPI_HOTKEYSCAN_FNF3,
1042         TP_ACPI_HOTKEYSCAN_FNF4,
1043         TP_ACPI_HOTKEYSCAN_FNF5,
1044         TP_ACPI_HOTKEYSCAN_FNF6,
1045         TP_ACPI_HOTKEYSCAN_FNF7,
1046         TP_ACPI_HOTKEYSCAN_FNF8,
1047         TP_ACPI_HOTKEYSCAN_FNF9,
1048         TP_ACPI_HOTKEYSCAN_FNF10,
1049         TP_ACPI_HOTKEYSCAN_FNF11,
1050         TP_ACPI_HOTKEYSCAN_FNF12,
1051         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
1052         TP_ACPI_HOTKEYSCAN_FNINSERT,
1053         TP_ACPI_HOTKEYSCAN_FNDELETE,
1054         TP_ACPI_HOTKEYSCAN_FNHOME,
1055         TP_ACPI_HOTKEYSCAN_FNEND,
1056         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1057         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
1058         TP_ACPI_HOTKEYSCAN_FNSPACE,
1059         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1060         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1061         TP_ACPI_HOTKEYSCAN_MUTE,
1062         TP_ACPI_HOTKEYSCAN_THINKPAD,
1063 };
1064
1065 enum {  /* Keys available through NVRAM polling */
1066         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
1067         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
1068 };
1069
1070 enum {  /* Positions of some of the keys in hotkey masks */
1071         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
1072         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
1073         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
1074         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
1075         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
1076         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
1077         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
1078         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
1079         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
1080         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
1081         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
1082 };
1083
1084 enum {  /* NVRAM to ACPI HKEY group map */
1085         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
1086                                           TP_ACPI_HKEY_ZOOM_MASK |
1087                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
1088                                           TP_ACPI_HKEY_HIBERNATE_MASK,
1089         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
1090                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
1091         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
1092                                           TP_ACPI_HKEY_VOLDWN_MASK |
1093                                           TP_ACPI_HKEY_MUTE_MASK,
1094 };
1095
1096 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1097 struct tp_nvram_state {
1098        u16 thinkpad_toggle:1;
1099        u16 zoom_toggle:1;
1100        u16 display_toggle:1;
1101        u16 thinklight_toggle:1;
1102        u16 hibernate_toggle:1;
1103        u16 displayexp_toggle:1;
1104        u16 display_state:1;
1105        u16 brightness_toggle:1;
1106        u16 volume_toggle:1;
1107        u16 mute:1;
1108
1109        u8 brightness_level;
1110        u8 volume_level;
1111 };
1112
1113 static struct task_struct *tpacpi_hotkey_task;
1114 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1115 static int hotkey_poll_freq = 10;       /* Hz */
1116 static struct mutex hotkey_thread_mutex;
1117 static struct mutex hotkey_thread_data_mutex;
1118 static unsigned int hotkey_config_change;
1119
1120 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1121
1122 #define hotkey_source_mask 0U
1123
1124 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1125
1126 static struct mutex hotkey_mutex;
1127
1128 static enum {   /* Reasons for waking up */
1129         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1130         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1131         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1132 } hotkey_wakeup_reason;
1133
1134 static int hotkey_autosleep_ack;
1135
1136 static int hotkey_orig_status;
1137 static u32 hotkey_orig_mask;
1138 static u32 hotkey_all_mask;
1139 static u32 hotkey_reserved_mask;
1140 static u32 hotkey_mask;
1141
1142 static unsigned int hotkey_report_mode;
1143
1144 static u16 *hotkey_keycode_map;
1145
1146 static struct attribute_set *hotkey_dev_attributes;
1147
1148 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1149 #define HOTKEY_CONFIG_CRITICAL_START \
1150         do { \
1151                 mutex_lock(&hotkey_thread_data_mutex); \
1152                 hotkey_config_change++; \
1153         } while (0);
1154 #define HOTKEY_CONFIG_CRITICAL_END \
1155         mutex_unlock(&hotkey_thread_data_mutex);
1156 #else
1157 #define HOTKEY_CONFIG_CRITICAL_START
1158 #define HOTKEY_CONFIG_CRITICAL_END
1159 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1160
1161 /* HKEY.MHKG() return bits */
1162 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1163
1164 static int hotkey_get_wlsw(int *status)
1165 {
1166         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1167                 return -EIO;
1168         return 0;
1169 }
1170
1171 static int hotkey_get_tablet_mode(int *status)
1172 {
1173         int s;
1174
1175         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1176                 return -EIO;
1177
1178         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1179         return 0;
1180 }
1181
1182 /*
1183  * Call with hotkey_mutex held
1184  */
1185 static int hotkey_mask_get(void)
1186 {
1187         u32 m = 0;
1188
1189         if (tp_features.hotkey_mask) {
1190                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1191                         return -EIO;
1192         }
1193         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1194
1195         return 0;
1196 }
1197
1198 /*
1199  * Call with hotkey_mutex held
1200  */
1201 static int hotkey_mask_set(u32 mask)
1202 {
1203         int i;
1204         int rc = 0;
1205
1206         if (tp_features.hotkey_mask) {
1207                 if (!tp_warned.hotkey_mask_ff &&
1208                     (mask == 0xffff || mask == 0xffffff ||
1209                      mask == 0xffffffff)) {
1210                         tp_warned.hotkey_mask_ff = 1;
1211                         printk(TPACPI_NOTICE
1212                                "setting the hotkey mask to 0x%08x is likely "
1213                                "not the best way to go about it\n", mask);
1214                         printk(TPACPI_NOTICE
1215                                "please consider using the driver defaults, "
1216                                "and refer to up-to-date thinkpad-acpi "
1217                                "documentation\n");
1218                 }
1219
1220                 HOTKEY_CONFIG_CRITICAL_START
1221                 for (i = 0; i < 32; i++) {
1222                         u32 m = 1 << i;
1223                         /* enable in firmware mask only keys not in NVRAM
1224                          * mode, but enable the key in the cached hotkey_mask
1225                          * regardless of mode, or the key will end up
1226                          * disabled by hotkey_mask_get() */
1227                         if (!acpi_evalf(hkey_handle,
1228                                         NULL, "MHKM", "vdd", i + 1,
1229                                         !!((mask & ~hotkey_source_mask) & m))) {
1230                                 rc = -EIO;
1231                                 break;
1232                         } else {
1233                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1234                         }
1235                 }
1236                 HOTKEY_CONFIG_CRITICAL_END
1237
1238                 /* hotkey_mask_get must be called unconditionally below */
1239                 if (!hotkey_mask_get() && !rc &&
1240                     (hotkey_mask & ~hotkey_source_mask) !=
1241                      (mask & ~hotkey_source_mask)) {
1242                         printk(TPACPI_NOTICE
1243                                "requested hot key mask 0x%08x, but "
1244                                "firmware forced it to 0x%08x\n",
1245                                mask, hotkey_mask);
1246                 }
1247         } else {
1248 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1249                 HOTKEY_CONFIG_CRITICAL_START
1250                 hotkey_mask = mask & hotkey_source_mask;
1251                 HOTKEY_CONFIG_CRITICAL_END
1252                 hotkey_mask_get();
1253                 if (hotkey_mask != mask) {
1254                         printk(TPACPI_NOTICE
1255                                "requested hot key mask 0x%08x, "
1256                                "forced to 0x%08x (NVRAM poll mask is "
1257                                "0x%08x): no firmware mask support\n",
1258                                mask, hotkey_mask, hotkey_source_mask);
1259                 }
1260 #else
1261                 hotkey_mask_get();
1262                 rc = -ENXIO;
1263 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1264         }
1265
1266         return rc;
1267 }
1268
1269 static int hotkey_status_get(int *status)
1270 {
1271         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1272                 return -EIO;
1273
1274         return 0;
1275 }
1276
1277 static int hotkey_status_set(int status)
1278 {
1279         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1280                 return -EIO;
1281
1282         return 0;
1283 }
1284
1285 static void tpacpi_input_send_radiosw(void)
1286 {
1287         int wlsw;
1288
1289         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1290                 mutex_lock(&tpacpi_inputdev_send_mutex);
1291
1292                 input_report_switch(tpacpi_inputdev,
1293                                     SW_RADIO, !!wlsw);
1294                 input_sync(tpacpi_inputdev);
1295
1296                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1297         }
1298 }
1299
1300 static void tpacpi_input_send_tabletsw(void)
1301 {
1302         int state;
1303
1304         if (tp_features.hotkey_tablet &&
1305             !hotkey_get_tablet_mode(&state)) {
1306                 mutex_lock(&tpacpi_inputdev_send_mutex);
1307
1308                 input_report_switch(tpacpi_inputdev,
1309                                     SW_TABLET_MODE, !!state);
1310                 input_sync(tpacpi_inputdev);
1311
1312                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1313         }
1314 }
1315
1316 static void tpacpi_input_send_key(unsigned int scancode)
1317 {
1318         unsigned int keycode;
1319
1320         keycode = hotkey_keycode_map[scancode];
1321
1322         if (keycode != KEY_RESERVED) {
1323                 mutex_lock(&tpacpi_inputdev_send_mutex);
1324
1325                 input_report_key(tpacpi_inputdev, keycode, 1);
1326                 if (keycode == KEY_UNKNOWN)
1327                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1328                                     scancode);
1329                 input_sync(tpacpi_inputdev);
1330
1331                 input_report_key(tpacpi_inputdev, keycode, 0);
1332                 if (keycode == KEY_UNKNOWN)
1333                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1334                                     scancode);
1335                 input_sync(tpacpi_inputdev);
1336
1337                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1338         }
1339 }
1340
1341 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1342 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1343
1344 static void tpacpi_hotkey_send_key(unsigned int scancode)
1345 {
1346         tpacpi_input_send_key(scancode);
1347         if (hotkey_report_mode < 2) {
1348                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1349                                                 0x80, 0x1001 + scancode);
1350         }
1351 }
1352
1353 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1354 {
1355         u8 d;
1356
1357         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1358                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1359                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1360                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1361                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1362                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1363         }
1364         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1365                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1366                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1367         }
1368         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1369                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1370                 n->displayexp_toggle =
1371                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1372         }
1373         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1374                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1375                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1376                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1377                 n->brightness_toggle =
1378                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1379         }
1380         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1381                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1382                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1383                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1384                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1385                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1386         }
1387 }
1388
1389 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1390         do { \
1391                 if ((mask & (1 << __scancode)) && \
1392                     oldn->__member != newn->__member) \
1393                 tpacpi_hotkey_send_key(__scancode); \
1394         } while (0)
1395
1396 #define TPACPI_MAY_SEND_KEY(__scancode) \
1397         do { if (mask & (1 << __scancode)) \
1398                 tpacpi_hotkey_send_key(__scancode); } while (0)
1399
1400 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1401                                            struct tp_nvram_state *newn,
1402                                            u32 mask)
1403 {
1404         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1405         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1406         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1407         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1408
1409         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1410
1411         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1412
1413         /* handle volume */
1414         if (oldn->volume_toggle != newn->volume_toggle) {
1415                 if (oldn->mute != newn->mute) {
1416                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1417                 }
1418                 if (oldn->volume_level > newn->volume_level) {
1419                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1420                 } else if (oldn->volume_level < newn->volume_level) {
1421                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1422                 } else if (oldn->mute == newn->mute) {
1423                         /* repeated key presses that didn't change state */
1424                         if (newn->mute) {
1425                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1426                         } else if (newn->volume_level != 0) {
1427                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1428                         } else {
1429                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1430                         }
1431                 }
1432         }
1433
1434         /* handle brightness */
1435         if (oldn->brightness_toggle != newn->brightness_toggle) {
1436                 if (oldn->brightness_level < newn->brightness_level) {
1437                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1438                 } else if (oldn->brightness_level > newn->brightness_level) {
1439                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1440                 } else {
1441                         /* repeated key presses that didn't change state */
1442                         if (newn->brightness_level != 0) {
1443                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1444                         } else {
1445                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1446                         }
1447                 }
1448         }
1449 }
1450
1451 #undef TPACPI_COMPARE_KEY
1452 #undef TPACPI_MAY_SEND_KEY
1453
1454 static int hotkey_kthread(void *data)
1455 {
1456         struct tp_nvram_state s[2];
1457         u32 mask;
1458         unsigned int si, so;
1459         unsigned long t;
1460         unsigned int change_detector, must_reset;
1461
1462         mutex_lock(&hotkey_thread_mutex);
1463
1464         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1465                 goto exit;
1466
1467         set_freezable();
1468
1469         so = 0;
1470         si = 1;
1471         t = 0;
1472
1473         /* Initial state for compares */
1474         mutex_lock(&hotkey_thread_data_mutex);
1475         change_detector = hotkey_config_change;
1476         mask = hotkey_source_mask & hotkey_mask;
1477         mutex_unlock(&hotkey_thread_data_mutex);
1478         hotkey_read_nvram(&s[so], mask);
1479
1480         while (!kthread_should_stop() && hotkey_poll_freq) {
1481                 if (t == 0)
1482                         t = 1000/hotkey_poll_freq;
1483                 t = msleep_interruptible(t);
1484                 if (unlikely(kthread_should_stop()))
1485                         break;
1486                 must_reset = try_to_freeze();
1487                 if (t > 0 && !must_reset)
1488                         continue;
1489
1490                 mutex_lock(&hotkey_thread_data_mutex);
1491                 if (must_reset || hotkey_config_change != change_detector) {
1492                         /* forget old state on thaw or config change */
1493                         si = so;
1494                         t = 0;
1495                         change_detector = hotkey_config_change;
1496                 }
1497                 mask = hotkey_source_mask & hotkey_mask;
1498                 mutex_unlock(&hotkey_thread_data_mutex);
1499
1500                 if (likely(mask)) {
1501                         hotkey_read_nvram(&s[si], mask);
1502                         if (likely(si != so)) {
1503                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1504                                                                 mask);
1505                         }
1506                 }
1507
1508                 so = si;
1509                 si ^= 1;
1510         }
1511
1512 exit:
1513         mutex_unlock(&hotkey_thread_mutex);
1514         return 0;
1515 }
1516
1517 static void hotkey_poll_stop_sync(void)
1518 {
1519         if (tpacpi_hotkey_task) {
1520                 if (frozen(tpacpi_hotkey_task) ||
1521                     freezing(tpacpi_hotkey_task))
1522                         thaw_process(tpacpi_hotkey_task);
1523
1524                 kthread_stop(tpacpi_hotkey_task);
1525                 tpacpi_hotkey_task = NULL;
1526                 mutex_lock(&hotkey_thread_mutex);
1527                 /* at this point, the thread did exit */
1528                 mutex_unlock(&hotkey_thread_mutex);
1529         }
1530 }
1531
1532 /* call with hotkey_mutex held */
1533 static void hotkey_poll_setup(int may_warn)
1534 {
1535         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1536             hotkey_poll_freq > 0 &&
1537             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1538                 if (!tpacpi_hotkey_task) {
1539                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1540                                         NULL, TPACPI_NVRAM_KTHREAD_NAME);
1541                         if (IS_ERR(tpacpi_hotkey_task)) {
1542                                 tpacpi_hotkey_task = NULL;
1543                                 printk(TPACPI_ERR
1544                                        "could not create kernel thread "
1545                                        "for hotkey polling\n");
1546                         }
1547                 }
1548         } else {
1549                 hotkey_poll_stop_sync();
1550                 if (may_warn &&
1551                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1552                         printk(TPACPI_NOTICE
1553                                 "hot keys 0x%08x require polling, "
1554                                 "which is currently disabled\n",
1555                                 hotkey_source_mask);
1556                 }
1557         }
1558 }
1559
1560 static void hotkey_poll_setup_safe(int may_warn)
1561 {
1562         mutex_lock(&hotkey_mutex);
1563         hotkey_poll_setup(may_warn);
1564         mutex_unlock(&hotkey_mutex);
1565 }
1566
1567 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1568
1569 static void hotkey_poll_setup_safe(int __unused)
1570 {
1571 }
1572
1573 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1574
1575 static int hotkey_inputdev_open(struct input_dev *dev)
1576 {
1577         switch (tpacpi_lifecycle) {
1578         case TPACPI_LIFE_INIT:
1579                 /*
1580                  * hotkey_init will call hotkey_poll_setup_safe
1581                  * at the appropriate moment
1582                  */
1583                 return 0;
1584         case TPACPI_LIFE_EXITING:
1585                 return -EBUSY;
1586         case TPACPI_LIFE_RUNNING:
1587                 hotkey_poll_setup_safe(0);
1588                 return 0;
1589         }
1590
1591         /* Should only happen if tpacpi_lifecycle is corrupt */
1592         BUG();
1593         return -EBUSY;
1594 }
1595
1596 static void hotkey_inputdev_close(struct input_dev *dev)
1597 {
1598         /* disable hotkey polling when possible */
1599         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1600                 hotkey_poll_setup_safe(0);
1601 }
1602
1603 /* sysfs hotkey enable ------------------------------------------------- */
1604 static ssize_t hotkey_enable_show(struct device *dev,
1605                            struct device_attribute *attr,
1606                            char *buf)
1607 {
1608         int res, status;
1609
1610         res = hotkey_status_get(&status);
1611         if (res)
1612                 return res;
1613
1614         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1615 }
1616
1617 static ssize_t hotkey_enable_store(struct device *dev,
1618                             struct device_attribute *attr,
1619                             const char *buf, size_t count)
1620 {
1621         unsigned long t;
1622         int res;
1623
1624         if (parse_strtoul(buf, 1, &t))
1625                 return -EINVAL;
1626
1627         res = hotkey_status_set(t);
1628
1629         return (res) ? res : count;
1630 }
1631
1632 static struct device_attribute dev_attr_hotkey_enable =
1633         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1634                 hotkey_enable_show, hotkey_enable_store);
1635
1636 /* sysfs hotkey mask --------------------------------------------------- */
1637 static ssize_t hotkey_mask_show(struct device *dev,
1638                            struct device_attribute *attr,
1639                            char *buf)
1640 {
1641         int res;
1642
1643         if (mutex_lock_interruptible(&hotkey_mutex))
1644                 return -ERESTARTSYS;
1645         res = hotkey_mask_get();
1646         mutex_unlock(&hotkey_mutex);
1647
1648         return (res)?
1649                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1650 }
1651
1652 static ssize_t hotkey_mask_store(struct device *dev,
1653                             struct device_attribute *attr,
1654                             const char *buf, size_t count)
1655 {
1656         unsigned long t;
1657         int res;
1658
1659         if (parse_strtoul(buf, 0xffffffffUL, &t))
1660                 return -EINVAL;
1661
1662         if (mutex_lock_interruptible(&hotkey_mutex))
1663                 return -ERESTARTSYS;
1664
1665         res = hotkey_mask_set(t);
1666
1667 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1668         hotkey_poll_setup(1);
1669 #endif
1670
1671         mutex_unlock(&hotkey_mutex);
1672
1673         return (res) ? res : count;
1674 }
1675
1676 static struct device_attribute dev_attr_hotkey_mask =
1677         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1678                 hotkey_mask_show, hotkey_mask_store);
1679
1680 /* sysfs hotkey bios_enabled ------------------------------------------- */
1681 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1682                            struct device_attribute *attr,
1683                            char *buf)
1684 {
1685         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1686 }
1687
1688 static struct device_attribute dev_attr_hotkey_bios_enabled =
1689         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1690
1691 /* sysfs hotkey bios_mask ---------------------------------------------- */
1692 static ssize_t hotkey_bios_mask_show(struct device *dev,
1693                            struct device_attribute *attr,
1694                            char *buf)
1695 {
1696         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1697 }
1698
1699 static struct device_attribute dev_attr_hotkey_bios_mask =
1700         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1701
1702 /* sysfs hotkey all_mask ----------------------------------------------- */
1703 static ssize_t hotkey_all_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 }
1710
1711 static struct device_attribute dev_attr_hotkey_all_mask =
1712         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1713
1714 /* sysfs hotkey recommended_mask --------------------------------------- */
1715 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1716                                             struct device_attribute *attr,
1717                                             char *buf)
1718 {
1719         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1720                         (hotkey_all_mask | hotkey_source_mask)
1721                         & ~hotkey_reserved_mask);
1722 }
1723
1724 static struct device_attribute dev_attr_hotkey_recommended_mask =
1725         __ATTR(hotkey_recommended_mask, S_IRUGO,
1726                 hotkey_recommended_mask_show, NULL);
1727
1728 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1729
1730 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1731 static ssize_t hotkey_source_mask_show(struct device *dev,
1732                            struct device_attribute *attr,
1733                            char *buf)
1734 {
1735         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1736 }
1737
1738 static ssize_t hotkey_source_mask_store(struct device *dev,
1739                             struct device_attribute *attr,
1740                             const char *buf, size_t count)
1741 {
1742         unsigned long t;
1743
1744         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1745                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1746                 return -EINVAL;
1747
1748         if (mutex_lock_interruptible(&hotkey_mutex))
1749                 return -ERESTARTSYS;
1750
1751         HOTKEY_CONFIG_CRITICAL_START
1752         hotkey_source_mask = t;
1753         HOTKEY_CONFIG_CRITICAL_END
1754
1755         hotkey_poll_setup(1);
1756
1757         mutex_unlock(&hotkey_mutex);
1758
1759         return count;
1760 }
1761
1762 static struct device_attribute dev_attr_hotkey_source_mask =
1763         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1764                 hotkey_source_mask_show, hotkey_source_mask_store);
1765
1766 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1767 static ssize_t hotkey_poll_freq_show(struct device *dev,
1768                            struct device_attribute *attr,
1769                            char *buf)
1770 {
1771         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1772 }
1773
1774 static ssize_t hotkey_poll_freq_store(struct device *dev,
1775                             struct device_attribute *attr,
1776                             const char *buf, size_t count)
1777 {
1778         unsigned long t;
1779
1780         if (parse_strtoul(buf, 25, &t))
1781                 return -EINVAL;
1782
1783         if (mutex_lock_interruptible(&hotkey_mutex))
1784                 return -ERESTARTSYS;
1785
1786         hotkey_poll_freq = t;
1787
1788         hotkey_poll_setup(1);
1789         mutex_unlock(&hotkey_mutex);
1790
1791         return count;
1792 }
1793
1794 static struct device_attribute dev_attr_hotkey_poll_freq =
1795         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1796                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1797
1798 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1799
1800 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1801 static ssize_t hotkey_radio_sw_show(struct device *dev,
1802                            struct device_attribute *attr,
1803                            char *buf)
1804 {
1805         int res, s;
1806         res = hotkey_get_wlsw(&s);
1807         if (res < 0)
1808                 return res;
1809
1810         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1811 }
1812
1813 static struct device_attribute dev_attr_hotkey_radio_sw =
1814         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1815
1816 static void hotkey_radio_sw_notify_change(void)
1817 {
1818         if (tp_features.hotkey_wlsw)
1819                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1820                              "hotkey_radio_sw");
1821 }
1822
1823 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1824 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1825                            struct device_attribute *attr,
1826                            char *buf)
1827 {
1828         int res, s;
1829         res = hotkey_get_tablet_mode(&s);
1830         if (res < 0)
1831                 return res;
1832
1833         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1834 }
1835
1836 static struct device_attribute dev_attr_hotkey_tablet_mode =
1837         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1838
1839 static void hotkey_tablet_mode_notify_change(void)
1840 {
1841         if (tp_features.hotkey_tablet)
1842                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1843                              "hotkey_tablet_mode");
1844 }
1845
1846 /* sysfs hotkey report_mode -------------------------------------------- */
1847 static ssize_t hotkey_report_mode_show(struct device *dev,
1848                            struct device_attribute *attr,
1849                            char *buf)
1850 {
1851         return snprintf(buf, PAGE_SIZE, "%d\n",
1852                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1853 }
1854
1855 static struct device_attribute dev_attr_hotkey_report_mode =
1856         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1857
1858 /* sysfs wakeup reason (pollable) -------------------------------------- */
1859 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1860                            struct device_attribute *attr,
1861                            char *buf)
1862 {
1863         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1864 }
1865
1866 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1867         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1868
1869 static void hotkey_wakeup_reason_notify_change(void)
1870 {
1871         if (tp_features.hotkey_mask)
1872                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1873                              "wakeup_reason");
1874 }
1875
1876 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1877 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1878                            struct device_attribute *attr,
1879                            char *buf)
1880 {
1881         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1882 }
1883
1884 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1885         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1886                hotkey_wakeup_hotunplug_complete_show, NULL);
1887
1888 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1889 {
1890         if (tp_features.hotkey_mask)
1891                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1892                              "wakeup_hotunplug_complete");
1893 }
1894
1895 /* --------------------------------------------------------------------- */
1896
1897 static struct attribute *hotkey_attributes[] __initdata = {
1898         &dev_attr_hotkey_enable.attr,
1899         &dev_attr_hotkey_bios_enabled.attr,
1900         &dev_attr_hotkey_report_mode.attr,
1901 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1902         &dev_attr_hotkey_mask.attr,
1903         &dev_attr_hotkey_all_mask.attr,
1904         &dev_attr_hotkey_recommended_mask.attr,
1905         &dev_attr_hotkey_source_mask.attr,
1906         &dev_attr_hotkey_poll_freq.attr,
1907 #endif
1908 };
1909
1910 static struct attribute *hotkey_mask_attributes[] __initdata = {
1911         &dev_attr_hotkey_bios_mask.attr,
1912 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1913         &dev_attr_hotkey_mask.attr,
1914         &dev_attr_hotkey_all_mask.attr,
1915         &dev_attr_hotkey_recommended_mask.attr,
1916 #endif
1917         &dev_attr_hotkey_wakeup_reason.attr,
1918         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1919 };
1920
1921 static int __init hotkey_init(struct ibm_init_struct *iibm)
1922 {
1923         /* Requirements for changing the default keymaps:
1924          *
1925          * 1. Many of the keys are mapped to KEY_RESERVED for very
1926          *    good reasons.  Do not change them unless you have deep
1927          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1928          *    the various ThinkPad models.  The driver behaves
1929          *    differently for KEY_RESERVED: such keys have their
1930          *    hot key mask *unset* in mask_recommended, and also
1931          *    in the initial hot key mask programmed into the
1932          *    firmware at driver load time, which means the firm-
1933          *    ware may react very differently if you change them to
1934          *    something else;
1935          *
1936          * 2. You must be subscribed to the linux-thinkpad and
1937          *    ibm-acpi-devel mailing lists, and you should read the
1938          *    list archives since 2007 if you want to change the
1939          *    keymaps.  This requirement exists so that you will
1940          *    know the past history of problems with the thinkpad-
1941          *    acpi driver keymaps, and also that you will be
1942          *    listening to any bug reports;
1943          *
1944          * 3. Do not send thinkpad-acpi specific patches directly to
1945          *    for merging, *ever*.  Send them to the linux-acpi
1946          *    mailinglist for comments.  Merging is to be done only
1947          *    through acpi-test and the ACPI maintainer.
1948          *
1949          * If the above is too much to ask, don't change the keymap.
1950          * Ask the thinkpad-acpi maintainer to do it, instead.
1951          */
1952         static u16 ibm_keycode_map[] __initdata = {
1953                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1954                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1955                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1956                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1957
1958                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1959                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1960                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1961                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1962
1963                 /* brightness: firmware always reacts to them, unless
1964                  * X.org did some tricks in the radeon BIOS scratch
1965                  * registers of *some* models */
1966                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1967                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1968
1969                 /* Thinklight: firmware always react to it */
1970                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1971
1972                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1973                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1974
1975                 /* Volume: firmware always react to it and reprograms
1976                  * the built-in *extra* mixer.  Never map it to control
1977                  * another mixer by default. */
1978                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1979                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1980                 KEY_RESERVED,   /* 0x16: MUTE */
1981
1982                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1983
1984                 /* (assignments unknown, please report if found) */
1985                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1986                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1987         };
1988         static u16 lenovo_keycode_map[] __initdata = {
1989                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1990                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
1991                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1992                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1993
1994                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1995                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1996                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1997                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1998
1999                 /* These either have to go through ACPI video, or
2000                  * act like in the IBM ThinkPads, so don't ever
2001                  * enable them by default */
2002                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
2003                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
2004
2005                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
2006
2007                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
2008                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
2009
2010                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
2011                  * react to it and reprograms the built-in *extra* mixer.
2012                  * Never map it to control another mixer by default.
2013                  *
2014                  * T60?, T61, R60?, R61: firmware and EC tries to send
2015                  * these over the regular keyboard, so these are no-ops,
2016                  * but there are still weird bugs re. MUTE, so do not
2017                  * change unless you get test reports from all Lenovo
2018                  * models.  May cause the BIOS to interfere with the
2019                  * HDA mixer.
2020                  */
2021                 KEY_RESERVED,   /* 0x14: VOLUME UP */
2022                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
2023                 KEY_RESERVED,   /* 0x16: MUTE */
2024
2025                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
2026
2027                 /* (assignments unknown, please report if found) */
2028                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2029                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
2030         };
2031
2032 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
2033 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
2034 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
2035
2036         int res, i;
2037         int status;
2038         int hkeyv;
2039
2040         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
2041
2042         BUG_ON(!tpacpi_inputdev);
2043         BUG_ON(tpacpi_inputdev->open != NULL ||
2044                tpacpi_inputdev->close != NULL);
2045
2046         TPACPI_ACPIHANDLE_INIT(hkey);
2047         mutex_init(&hotkey_mutex);
2048
2049 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2050         mutex_init(&hotkey_thread_mutex);
2051         mutex_init(&hotkey_thread_data_mutex);
2052 #endif
2053
2054         /* hotkey not supported on 570 */
2055         tp_features.hotkey = hkey_handle != NULL;
2056
2057         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
2058                 str_supported(tp_features.hotkey));
2059
2060         if (tp_features.hotkey) {
2061                 hotkey_dev_attributes = create_attr_set(13, NULL);
2062                 if (!hotkey_dev_attributes)
2063                         return -ENOMEM;
2064                 res = add_many_to_attr_set(hotkey_dev_attributes,
2065                                 hotkey_attributes,
2066                                 ARRAY_SIZE(hotkey_attributes));
2067                 if (res)
2068                         return res;
2069
2070                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2071                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
2072                    for HKEY interface version 0x100 */
2073                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
2074                         if ((hkeyv >> 8) != 1) {
2075                                 printk(TPACPI_ERR "unknown version of the "
2076                                        "HKEY interface: 0x%x\n", hkeyv);
2077                                 printk(TPACPI_ERR "please report this to %s\n",
2078                                        TPACPI_MAIL);
2079                         } else {
2080                                 /*
2081                                  * MHKV 0x100 in A31, R40, R40e,
2082                                  * T4x, X31, and later
2083                                  */
2084                                 tp_features.hotkey_mask = 1;
2085                         }
2086                 }
2087
2088                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
2089                         str_supported(tp_features.hotkey_mask));
2090
2091                 if (tp_features.hotkey_mask) {
2092                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
2093                                         "MHKA", "qd")) {
2094                                 printk(TPACPI_ERR
2095                                        "missing MHKA handler, "
2096                                        "please report this to %s\n",
2097                                        TPACPI_MAIL);
2098                                 /* FN+F12, FN+F4, FN+F3 */
2099                                 hotkey_all_mask = 0x080cU;
2100                         }
2101                 }
2102
2103                 /* hotkey_source_mask *must* be zero for
2104                  * the first hotkey_mask_get */
2105                 res = hotkey_status_get(&hotkey_orig_status);
2106                 if (!res && tp_features.hotkey_mask) {
2107                         res = hotkey_mask_get();
2108                         hotkey_orig_mask = hotkey_mask;
2109                         if (!res) {
2110                                 res = add_many_to_attr_set(
2111                                         hotkey_dev_attributes,
2112                                         hotkey_mask_attributes,
2113                                         ARRAY_SIZE(hotkey_mask_attributes));
2114                         }
2115                 }
2116
2117 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2118                 if (tp_features.hotkey_mask) {
2119                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2120                                                 & ~hotkey_all_mask;
2121                 } else {
2122                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2123                 }
2124
2125                 vdbg_printk(TPACPI_DBG_INIT,
2126                             "hotkey source mask 0x%08x, polling freq %d\n",
2127                             hotkey_source_mask, hotkey_poll_freq);
2128 #endif
2129
2130                 /* Not all thinkpads have a hardware radio switch */
2131                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2132                         tp_features.hotkey_wlsw = 1;
2133                         printk(TPACPI_INFO
2134                                 "radio switch found; radios are %s\n",
2135                                 enabled(status, 0));
2136                         res = add_to_attr_set(hotkey_dev_attributes,
2137                                         &dev_attr_hotkey_radio_sw.attr);
2138                 }
2139
2140                 /* For X41t, X60t, X61t Tablets... */
2141                 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2142                         tp_features.hotkey_tablet = 1;
2143                         printk(TPACPI_INFO
2144                                 "possible tablet mode switch found; "
2145                                 "ThinkPad in %s mode\n",
2146                                 (status & TP_HOTKEY_TABLET_MASK)?
2147                                         "tablet" : "laptop");
2148                         res = add_to_attr_set(hotkey_dev_attributes,
2149                                         &dev_attr_hotkey_tablet_mode.attr);
2150                 }
2151
2152                 if (!res)
2153                         res = register_attr_set_with_sysfs(
2154                                         hotkey_dev_attributes,
2155                                         &tpacpi_pdev->dev.kobj);
2156                 if (res)
2157                         return res;
2158
2159                 /* Set up key map */
2160
2161                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2162                                                 GFP_KERNEL);
2163                 if (!hotkey_keycode_map) {
2164                         printk(TPACPI_ERR
2165                                 "failed to allocate memory for key map\n");
2166                         return -ENOMEM;
2167                 }
2168
2169                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2170                         dbg_printk(TPACPI_DBG_INIT,
2171                                    "using Lenovo default hot key map\n");
2172                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2173                                 TPACPI_HOTKEY_MAP_SIZE);
2174                 } else {
2175                         dbg_printk(TPACPI_DBG_INIT,
2176                                    "using IBM default hot key map\n");
2177                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
2178                                 TPACPI_HOTKEY_MAP_SIZE);
2179                 }
2180
2181                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2182                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2183                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2184                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2185                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2186                 tpacpi_inputdev->keycode = hotkey_keycode_map;
2187                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2188                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
2189                                 set_bit(hotkey_keycode_map[i],
2190                                         tpacpi_inputdev->keybit);
2191                         } else {
2192                                 if (i < sizeof(hotkey_reserved_mask)*8)
2193                                         hotkey_reserved_mask |= 1 << i;
2194                         }
2195                 }
2196
2197                 if (tp_features.hotkey_wlsw) {
2198                         set_bit(EV_SW, tpacpi_inputdev->evbit);
2199                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
2200                 }
2201                 if (tp_features.hotkey_tablet) {
2202                         set_bit(EV_SW, tpacpi_inputdev->evbit);
2203                         set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2204                 }
2205
2206                 /* Do not issue duplicate brightness change events to
2207                  * userspace */
2208                 if (!tp_features.bright_acpimode)
2209                         /* update bright_acpimode... */
2210                         tpacpi_check_std_acpi_brightness_support();
2211
2212                 if (tp_features.bright_acpimode) {
2213                         printk(TPACPI_INFO
2214                                "This ThinkPad has standard ACPI backlight "
2215                                "brightness control, supported by the ACPI "
2216                                "video driver\n");
2217                         printk(TPACPI_NOTICE
2218                                "Disabling thinkpad-acpi brightness events "
2219                                "by default...\n");
2220
2221                         /* The hotkey_reserved_mask change below is not
2222                          * necessary while the keys are at KEY_RESERVED in the
2223                          * default map, but better safe than sorry, leave it
2224                          * here as a marker of what we have to do, especially
2225                          * when we finally become able to set this at runtime
2226                          * on response to X.org requests */
2227                         hotkey_reserved_mask |=
2228                                 (1 << TP_ACPI_HOTKEYSCAN_FNHOME)
2229                                 | (1 << TP_ACPI_HOTKEYSCAN_FNEND);
2230                 }
2231
2232                 dbg_printk(TPACPI_DBG_INIT,
2233                                 "enabling hot key handling\n");
2234                 res = hotkey_status_set(1);
2235                 if (res)
2236                         return res;
2237                 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2238                                         & ~hotkey_reserved_mask)
2239                                         | hotkey_orig_mask);
2240                 if (res < 0 && res != -ENXIO)
2241                         return res;
2242
2243                 dbg_printk(TPACPI_DBG_INIT,
2244                                 "legacy hot key reporting over procfs %s\n",
2245                                 (hotkey_report_mode < 2) ?
2246                                         "enabled" : "disabled");
2247
2248                 tpacpi_inputdev->open = &hotkey_inputdev_open;
2249                 tpacpi_inputdev->close = &hotkey_inputdev_close;
2250
2251                 hotkey_poll_setup_safe(1);
2252                 tpacpi_input_send_radiosw();
2253                 tpacpi_input_send_tabletsw();
2254         }
2255
2256         return (tp_features.hotkey)? 0 : 1;
2257 }
2258
2259 static void hotkey_exit(void)
2260 {
2261 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2262         hotkey_poll_stop_sync();
2263 #endif
2264
2265         if (tp_features.hotkey) {
2266                 dbg_printk(TPACPI_DBG_EXIT,
2267                            "restoring original hot key mask\n");
2268                 /* no short-circuit boolean operator below! */
2269                 if ((hotkey_mask_set(hotkey_orig_mask) |
2270                      hotkey_status_set(hotkey_orig_status)) != 0)
2271                         printk(TPACPI_ERR
2272                                "failed to restore hot key mask "
2273                                "to BIOS defaults\n");
2274         }
2275
2276         if (hotkey_dev_attributes) {
2277                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2278                 hotkey_dev_attributes = NULL;
2279         }
2280 }
2281
2282 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2283 {
2284         u32 hkey;
2285         unsigned int scancode;
2286         int send_acpi_ev;
2287         int ignore_acpi_ev;
2288         int unk_ev;
2289
2290         if (event != 0x80) {
2291                 printk(TPACPI_ERR
2292                        "unknown HKEY notification event %d\n", event);
2293                 /* forward it to userspace, maybe it knows how to handle it */
2294                 acpi_bus_generate_netlink_event(
2295                                         ibm->acpi->device->pnp.device_class,
2296                                         ibm->acpi->device->dev.bus_id,
2297                                         event, 0);
2298                 return;
2299         }
2300
2301         while (1) {
2302                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2303                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2304                         return;
2305                 }
2306
2307                 if (hkey == 0) {
2308                         /* queue empty */
2309                         return;
2310                 }
2311
2312                 send_acpi_ev = 1;
2313                 ignore_acpi_ev = 0;
2314                 unk_ev = 0;
2315
2316                 switch (hkey >> 12) {
2317                 case 1:
2318                         /* 0x1000-0x1FFF: key presses */
2319                         scancode = hkey & 0xfff;
2320                         if (scancode > 0 && scancode < 0x21) {
2321                                 scancode--;
2322                                 if (!(hotkey_source_mask & (1 << scancode))) {
2323                                         tpacpi_input_send_key(scancode);
2324                                         send_acpi_ev = 0;
2325                                 } else {
2326                                         ignore_acpi_ev = 1;
2327                                 }
2328                         } else {
2329                                 unk_ev = 1;
2330                         }
2331                         break;
2332                 case 2:
2333                         /* Wakeup reason */
2334                         switch (hkey) {
2335                         case 0x2304: /* suspend, undock */
2336                         case 0x2404: /* hibernation, undock */
2337                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2338                                 ignore_acpi_ev = 1;
2339                                 break;
2340                         case 0x2305: /* suspend, bay eject */
2341                         case 0x2405: /* hibernation, bay eject */
2342                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2343                                 ignore_acpi_ev = 1;
2344                                 break;
2345                         default:
2346                                 unk_ev = 1;
2347                         }
2348                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2349                                 printk(TPACPI_INFO
2350                                        "woke up due to a hot-unplug "
2351                                        "request...\n");
2352                                 hotkey_wakeup_reason_notify_change();
2353                         }
2354                         break;
2355                 case 3:
2356                         /* bay-related wakeups */
2357                         if (hkey == 0x3003) {
2358                                 hotkey_autosleep_ack = 1;
2359                                 printk(TPACPI_INFO
2360                                        "bay ejected\n");
2361                                 hotkey_wakeup_hotunplug_complete_notify_change();
2362                         } else {
2363                                 unk_ev = 1;
2364                         }
2365                         break;
2366                 case 4:
2367                         /* dock-related wakeups */
2368                         if (hkey == 0x4003) {
2369                                 hotkey_autosleep_ack = 1;
2370                                 printk(TPACPI_INFO
2371                                        "undocked\n");
2372                                 hotkey_wakeup_hotunplug_complete_notify_change();
2373                         } else {
2374                                 unk_ev = 1;
2375                         }
2376                         break;
2377                 case 5:
2378                         /* 0x5000-0x5FFF: human interface helpers */
2379                         switch (hkey) {
2380                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2381                         case 0x500b: /* X61t: tablet pen inserted into bay */
2382                         case 0x500c: /* X61t: tablet pen removed from bay */
2383                                 break;
2384                         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2385                         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2386                                 tpacpi_input_send_tabletsw();
2387                                 hotkey_tablet_mode_notify_change();
2388                                 send_acpi_ev = 0;
2389                                 break;
2390                         case 0x5001:
2391                         case 0x5002:
2392                                 /* LID switch events.  Do not propagate */
2393                                 ignore_acpi_ev = 1;
2394                                 break;
2395                         default:
2396                                 unk_ev = 1;
2397                         }
2398                         break;
2399                 case 7:
2400                         /* 0x7000-0x7FFF: misc */
2401                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2402                                 tpacpi_input_send_radiosw();
2403                                 hotkey_radio_sw_notify_change();
2404                                 send_acpi_ev = 0;
2405                                 break;
2406                         }
2407                         /* fallthrough to default */
2408                 default:
2409                         unk_ev = 1;
2410                 }
2411                 if (unk_ev) {
2412                         printk(TPACPI_NOTICE
2413                                "unhandled HKEY event 0x%04x\n", hkey);
2414                 }
2415
2416                 /* Legacy events */
2417                 if (!ignore_acpi_ev &&
2418                     (send_acpi_ev || hotkey_report_mode < 2)) {
2419                         acpi_bus_generate_proc_event(ibm->acpi->device,
2420                                                      event, hkey);
2421                 }
2422
2423                 /* netlink events */
2424                 if (!ignore_acpi_ev && send_acpi_ev) {
2425                         acpi_bus_generate_netlink_event(
2426                                         ibm->acpi->device->pnp.device_class,
2427                                         ibm->acpi->device->dev.bus_id,
2428                                         event, hkey);
2429                 }
2430         }
2431 }
2432
2433 static void hotkey_suspend(pm_message_t state)
2434 {
2435         /* Do these on suspend, we get the events on early resume! */
2436         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2437         hotkey_autosleep_ack = 0;
2438 }
2439
2440 static void hotkey_resume(void)
2441 {
2442         if (hotkey_mask_get())
2443                 printk(TPACPI_ERR
2444                        "error while trying to read hot key mask "
2445                        "from firmware\n");
2446         tpacpi_input_send_radiosw();
2447         hotkey_radio_sw_notify_change();
2448         hotkey_tablet_mode_notify_change();
2449         hotkey_wakeup_reason_notify_change();
2450         hotkey_wakeup_hotunplug_complete_notify_change();
2451         hotkey_poll_setup_safe(0);
2452 }
2453
2454 /* procfs -------------------------------------------------------------- */
2455 static int hotkey_read(char *p)
2456 {
2457         int res, status;
2458         int len = 0;
2459
2460         if (!tp_features.hotkey) {
2461                 len += sprintf(p + len, "status:\t\tnot supported\n");
2462                 return len;
2463         }
2464
2465         if (mutex_lock_interruptible(&hotkey_mutex))
2466                 return -ERESTARTSYS;
2467         res = hotkey_status_get(&status);
2468         if (!res)
2469                 res = hotkey_mask_get();
2470         mutex_unlock(&hotkey_mutex);
2471         if (res)
2472                 return res;
2473
2474         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2475         if (tp_features.hotkey_mask) {
2476                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2477                 len += sprintf(p + len,
2478                                "commands:\tenable, disable, reset, <mask>\n");
2479         } else {
2480                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2481                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2482         }
2483
2484         return len;
2485 }
2486
2487 static int hotkey_write(char *buf)
2488 {
2489         int res, status;
2490         u32 mask;
2491         char *cmd;
2492
2493         if (!tp_features.hotkey)
2494                 return -ENODEV;
2495
2496         if (mutex_lock_interruptible(&hotkey_mutex))
2497                 return -ERESTARTSYS;
2498
2499         status = -1;
2500         mask = hotkey_mask;
2501
2502         res = 0;
2503         while ((cmd = next_cmd(&buf))) {
2504                 if (strlencmp(cmd, "enable") == 0) {
2505                         status = 1;
2506                 } else if (strlencmp(cmd, "disable") == 0) {
2507                         status = 0;
2508                 } else if (strlencmp(cmd, "reset") == 0) {
2509                         status = hotkey_orig_status;
2510                         mask = hotkey_orig_mask;
2511                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2512                         /* mask set */
2513                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2514                         /* mask set */
2515                 } else {
2516                         res = -EINVAL;
2517                         goto errexit;
2518                 }
2519         }
2520         if (status != -1)
2521                 res = hotkey_status_set(status);
2522
2523         if (!res && mask != hotkey_mask)
2524                 res = hotkey_mask_set(mask);
2525
2526 errexit:
2527         mutex_unlock(&hotkey_mutex);
2528         return res;
2529 }
2530
2531 static const struct acpi_device_id ibm_htk_device_ids[] = {
2532         {TPACPI_ACPI_HKEY_HID, 0},
2533         {"", 0},
2534 };
2535
2536 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2537         .hid = ibm_htk_device_ids,
2538         .notify = hotkey_notify,
2539         .handle = &hkey_handle,
2540         .type = ACPI_DEVICE_NOTIFY,
2541 };
2542
2543 static struct ibm_struct hotkey_driver_data = {
2544         .name = "hotkey",
2545         .read = hotkey_read,
2546         .write = hotkey_write,
2547         .exit = hotkey_exit,
2548         .resume = hotkey_resume,
2549         .suspend = hotkey_suspend,
2550         .acpi = &ibm_hotkey_acpidriver,
2551 };
2552
2553 /*************************************************************************
2554  * Bluetooth subdriver
2555  */
2556
2557 enum {
2558         /* ACPI GBDC/SBDC bits */
2559         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2560         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2561         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2562 };
2563
2564 static int bluetooth_get_radiosw(void);
2565 static int bluetooth_set_radiosw(int radio_on);
2566
2567 /* sysfs bluetooth enable ---------------------------------------------- */
2568 static ssize_t bluetooth_enable_show(struct device *dev,
2569                            struct device_attribute *attr,
2570                            char *buf)
2571 {
2572         int status;
2573
2574         status = bluetooth_get_radiosw();
2575         if (status < 0)
2576                 return status;
2577
2578         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2579 }
2580
2581 static ssize_t bluetooth_enable_store(struct device *dev,
2582                             struct device_attribute *attr,
2583                             const char *buf, size_t count)
2584 {
2585         unsigned long t;
2586         int res;
2587
2588         if (parse_strtoul(buf, 1, &t))
2589                 return -EINVAL;
2590
2591         res = bluetooth_set_radiosw(t);
2592
2593         return (res) ? res : count;
2594 }
2595
2596 static struct device_attribute dev_attr_bluetooth_enable =
2597         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2598                 bluetooth_enable_show, bluetooth_enable_store);
2599
2600 /* --------------------------------------------------------------------- */
2601
2602 static struct attribute *bluetooth_attributes[] = {
2603         &dev_attr_bluetooth_enable.attr,
2604         NULL
2605 };
2606
2607 static const struct attribute_group bluetooth_attr_group = {
2608         .attrs = bluetooth_attributes,
2609 };
2610
2611 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2612 {
2613         int res;
2614         int status = 0;
2615
2616         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2617
2618         TPACPI_ACPIHANDLE_INIT(hkey);
2619
2620         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2621            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2622         tp_features.bluetooth = hkey_handle &&
2623             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2624
2625         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2626                 str_supported(tp_features.bluetooth),
2627                 status);
2628
2629         if (tp_features.bluetooth) {
2630                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2631                         /* no bluetooth hardware present in system */
2632                         tp_features.bluetooth = 0;
2633                         dbg_printk(TPACPI_DBG_INIT,
2634                                    "bluetooth hardware not installed\n");
2635                 } else {
2636                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2637                                         &bluetooth_attr_group);
2638                         if (res)
2639                                 return res;
2640                 }
2641         }
2642
2643         return (tp_features.bluetooth)? 0 : 1;
2644 }
2645
2646 static void bluetooth_exit(void)
2647 {
2648         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2649                         &bluetooth_attr_group);
2650 }
2651
2652 static int bluetooth_get_radiosw(void)
2653 {
2654         int status;
2655
2656         if (!tp_features.bluetooth)
2657                 return -ENODEV;
2658
2659         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2660                 return -EIO;
2661
2662         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2663 }
2664
2665 static int bluetooth_set_radiosw(int radio_on)
2666 {
2667         int status;
2668
2669         if (!tp_features.bluetooth)
2670                 return -ENODEV;
2671
2672         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2673                 return -EIO;
2674         if (radio_on)
2675                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2676         else
2677                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2678         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2679                 return -EIO;
2680
2681         return 0;
2682 }
2683
2684 /* procfs -------------------------------------------------------------- */
2685 static int bluetooth_read(char *p)
2686 {
2687         int len = 0;
2688         int status = bluetooth_get_radiosw();
2689
2690         if (!tp_features.bluetooth)
2691                 len += sprintf(p + len, "status:\t\tnot supported\n");
2692         else {
2693                 len += sprintf(p + len, "status:\t\t%s\n",
2694                                 (status)? "enabled" : "disabled");
2695                 len += sprintf(p + len, "commands:\tenable, disable\n");
2696         }
2697
2698         return len;
2699 }
2700
2701 static int bluetooth_write(char *buf)
2702 {
2703         char *cmd;
2704
2705         if (!tp_features.bluetooth)
2706                 return -ENODEV;
2707
2708         while ((cmd = next_cmd(&buf))) {
2709                 if (strlencmp(cmd, "enable") == 0) {
2710                         bluetooth_set_radiosw(1);
2711                 } else if (strlencmp(cmd, "disable") == 0) {
2712                         bluetooth_set_radiosw(0);
2713                 } else
2714                         return -EINVAL;
2715         }
2716
2717         return 0;
2718 }
2719
2720 static struct ibm_struct bluetooth_driver_data = {
2721         .name = "bluetooth",
2722         .read = bluetooth_read,
2723         .write = bluetooth_write,
2724         .exit = bluetooth_exit,
2725 };
2726
2727 /*************************************************************************
2728  * Wan subdriver
2729  */
2730
2731 enum {
2732         /* ACPI GWAN/SWAN bits */
2733         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2734         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2735         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2736 };
2737
2738 static int wan_get_radiosw(void);
2739 static int wan_set_radiosw(int radio_on);
2740
2741 /* sysfs wan enable ---------------------------------------------------- */
2742 static ssize_t wan_enable_show(struct device *dev,
2743                            struct device_attribute *attr,
2744                            char *buf)
2745 {
2746         int status;
2747
2748         status = wan_get_radiosw();
2749         if (status < 0)
2750                 return status;
2751
2752         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2753 }
2754
2755 static ssize_t wan_enable_store(struct device *dev,
2756                             struct device_attribute *attr,
2757                             const char *buf, size_t count)
2758 {
2759         unsigned long t;
2760         int res;
2761
2762         if (parse_strtoul(buf, 1, &t))
2763                 return -EINVAL;
2764
2765         res = wan_set_radiosw(t);
2766
2767         return (res) ? res : count;
2768 }
2769
2770 static struct device_attribute dev_attr_wan_enable =
2771         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2772                 wan_enable_show, wan_enable_store);
2773
2774 /* --------------------------------------------------------------------- */
2775
2776 static struct attribute *wan_attributes[] = {
2777         &dev_attr_wan_enable.attr,
2778         NULL
2779 };
2780
2781 static const struct attribute_group wan_attr_group = {
2782         .attrs = wan_attributes,
2783 };
2784
2785 static int __init wan_init(struct ibm_init_struct *iibm)
2786 {
2787         int res;
2788         int status = 0;
2789
2790         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2791
2792         TPACPI_ACPIHANDLE_INIT(hkey);
2793
2794         tp_features.wan = hkey_handle &&
2795             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2796
2797         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2798                 str_supported(tp_features.wan),
2799                 status);
2800
2801         if (tp_features.wan) {
2802                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2803                         /* no wan hardware present in system */
2804                         tp_features.wan = 0;
2805                         dbg_printk(TPACPI_DBG_INIT,
2806                                    "wan hardware not installed\n");
2807                 } else {
2808                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2809                                         &wan_attr_group);
2810                         if (res)
2811                                 return res;
2812                 }
2813         }
2814
2815         return (tp_features.wan)? 0 : 1;
2816 }
2817
2818 static void wan_exit(void)
2819 {
2820         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2821                 &wan_attr_group);
2822 }
2823
2824 static int wan_get_radiosw(void)
2825 {
2826         int status;
2827
2828         if (!tp_features.wan)
2829                 return -ENODEV;
2830
2831         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2832                 return -EIO;
2833
2834         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2835 }
2836
2837 static int wan_set_radiosw(int radio_on)
2838 {
2839         int status;
2840
2841         if (!tp_features.wan)
2842                 return -ENODEV;
2843
2844         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2845                 return -EIO;
2846         if (radio_on)
2847                 status |= TP_ACPI_WANCARD_RADIOSSW;
2848         else
2849                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2850         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2851                 return -EIO;
2852
2853         return 0;
2854 }
2855
2856 /* procfs -------------------------------------------------------------- */
2857 static int wan_read(char *p)
2858 {
2859         int len = 0;
2860         int status = wan_get_radiosw();
2861
2862         if (!tp_features.wan)
2863                 len += sprintf(p + len, "status:\t\tnot supported\n");
2864         else {
2865                 len += sprintf(p + len, "status:\t\t%s\n",
2866                                 (status)? "enabled" : "disabled");
2867                 len += sprintf(p + len, "commands:\tenable, disable\n");
2868         }
2869
2870         return len;
2871 }
2872
2873 static int wan_write(char *buf)
2874 {
2875         char *cmd;
2876
2877         if (!tp_features.wan)
2878                 return -ENODEV;
2879
2880         while ((cmd = next_cmd(&buf))) {
2881                 if (strlencmp(cmd, "enable") == 0) {
2882                         wan_set_radiosw(1);
2883                 } else if (strlencmp(cmd, "disable") == 0) {
2884                         wan_set_radiosw(0);
2885                 } else
2886                         return -EINVAL;
2887         }
2888
2889         return 0;
2890 }
2891
2892 static struct ibm_struct wan_driver_data = {
2893         .name = "wan",
2894         .read = wan_read,
2895         .write = wan_write,
2896         .exit = wan_exit,
2897         .flags.experimental = 1,
2898 };
2899
2900 /*************************************************************************
2901  * Video subdriver
2902  */
2903
2904 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2905
2906 enum video_access_mode {
2907         TPACPI_VIDEO_NONE = 0,
2908         TPACPI_VIDEO_570,       /* 570 */
2909         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2910         TPACPI_VIDEO_NEW,       /* all others */
2911 };
2912
2913 enum {  /* video status flags, based on VIDEO_570 */
2914         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2915         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2916         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2917 };
2918
2919 enum {  /* TPACPI_VIDEO_570 constants */
2920         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2921         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2922                                                  * video_status_flags */
2923         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2924         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2925 };
2926
2927 static enum video_access_mode video_supported;
2928 static int video_orig_autosw;
2929
2930 static int video_autosw_get(void);
2931 static int video_autosw_set(int enable);
2932
2933 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2934
2935 static int __init video_init(struct ibm_init_struct *iibm)
2936 {
2937         int ivga;
2938
2939         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2940
2941         TPACPI_ACPIHANDLE_INIT(vid);
2942         TPACPI_ACPIHANDLE_INIT(vid2);
2943
2944         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2945                 /* G41, assume IVGA doesn't change */
2946                 vid_handle = vid2_handle;
2947
2948         if (!vid_handle)
2949                 /* video switching not supported on R30, R31 */
2950                 video_supported = TPACPI_VIDEO_NONE;
2951         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2952                 /* 570 */
2953                 video_supported = TPACPI_VIDEO_570;
2954         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2955                 /* 600e/x, 770e, 770x */
2956                 video_supported = TPACPI_VIDEO_770;
2957         else
2958                 /* all others */
2959                 video_supported = TPACPI_VIDEO_NEW;
2960
2961         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2962                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2963                 video_supported);
2964
2965         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2966 }
2967
2968 static void video_exit(void)
2969 {
2970         dbg_printk(TPACPI_DBG_EXIT,
2971                    "restoring original video autoswitch mode\n");
2972         if (video_autosw_set(video_orig_autosw))
2973                 printk(TPACPI_ERR "error while trying to restore original "
2974                         "video autoswitch mode\n");
2975 }
2976
2977 static int video_outputsw_get(void)
2978 {
2979         int status = 0;
2980         int i;
2981
2982         switch (video_supported) {
2983         case TPACPI_VIDEO_570:
2984                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2985                                  TP_ACPI_VIDEO_570_PHSCMD))
2986                         return -EIO;
2987                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2988                 break;
2989         case TPACPI_VIDEO_770:
2990                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2991                         return -EIO;
2992                 if (i)
2993                         status |= TP_ACPI_VIDEO_S_LCD;
2994                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2995                         return -EIO;
2996                 if (i)
2997                         status |= TP_ACPI_VIDEO_S_CRT;
2998                 break;
2999         case TPACPI_VIDEO_NEW:
3000                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
3001                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
3002                         return -EIO;
3003                 if (i)
3004                         status |= TP_ACPI_VIDEO_S_CRT;
3005
3006                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
3007                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
3008                         return -EIO;
3009                 if (i)
3010                         status |= TP_ACPI_VIDEO_S_LCD;
3011                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
3012                         return -EIO;
3013                 if (i)
3014                         status |= TP_ACPI_VIDEO_S_DVI;
3015                 break;
3016         default:
3017                 return -ENOSYS;
3018         }
3019
3020         return status;
3021 }
3022
3023 static int video_outputsw_set(int status)
3024 {
3025         int autosw;
3026         int res = 0;
3027
3028         switch (video_supported) {
3029         case TPACPI_VIDEO_570:
3030                 res = acpi_evalf(NULL, NULL,
3031                                  "\\_SB.PHS2", "vdd",
3032                                  TP_ACPI_VIDEO_570_PHS2CMD,
3033                                  status | TP_ACPI_VIDEO_570_PHS2SET);
3034                 break;
3035         case TPACPI_VIDEO_770:
3036                 autosw = video_autosw_get();
3037                 if (autosw < 0)
3038                         return autosw;
3039
3040                 res = video_autosw_set(1);
3041                 if (res)
3042                         return res;
3043                 res = acpi_evalf(vid_handle, NULL,
3044                                  "ASWT", "vdd", status * 0x100, 0);
3045                 if (!autosw && video_autosw_set(autosw)) {
3046                         printk(TPACPI_ERR
3047                                "video auto-switch left enabled due to error\n");
3048                         return -EIO;
3049                 }
3050                 break;
3051         case TPACPI_VIDEO_NEW:
3052                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
3053                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
3054                 break;
3055         default:
3056                 return -ENOSYS;
3057         }
3058
3059         return (res)? 0 : -EIO;
3060 }
3061
3062 static int video_autosw_get(void)
3063 {
3064         int autosw = 0;
3065
3066         switch (video_supported) {
3067         case TPACPI_VIDEO_570:
3068                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
3069                         return -EIO;
3070                 break;
3071         case TPACPI_VIDEO_770:
3072         case TPACPI_VIDEO_NEW:
3073                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
3074                         return -EIO;
3075                 break;
3076         default:
3077                 return -ENOSYS;
3078         }
3079
3080         return autosw & 1;
3081 }
3082
3083 static int video_autosw_set(int enable)
3084 {
3085         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
3086                 return -EIO;
3087         return 0;
3088 }
3089
3090 static int video_outputsw_cycle(void)
3091 {
3092         int autosw = video_autosw_get();
3093         int res;
3094
3095         if (autosw < 0)
3096                 return autosw;
3097
3098         switch (video_supported) {
3099         case TPACPI_VIDEO_570:
3100                 res = video_autosw_set(1);
3101                 if (res)
3102                         return res;
3103                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
3104                 break;
3105         case TPACPI_VIDEO_770:
3106         case TPACPI_VIDEO_NEW:
3107                 res = video_autosw_set(1);
3108                 if (res)
3109                         return res;
3110                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
3111                 break;
3112         default:
3113                 return -ENOSYS;
3114         }
3115         if (!autosw && video_autosw_set(autosw)) {
3116                 printk(TPACPI_ERR
3117                        "video auto-switch left enabled due to error\n");
3118                 return -EIO;
3119         }
3120
3121         return (res)? 0 : -EIO;
3122 }
3123
3124 static int video_expand_toggle(void)
3125 {
3126         switch (video_supported) {
3127         case TPACPI_VIDEO_570:
3128                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
3129                         0 : -EIO;
3130         case TPACPI_VIDEO_770:
3131                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
3132                         0 : -EIO;
3133         case TPACPI_VIDEO_NEW:
3134                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
3135                         0 : -EIO;
3136         default:
3137                 return -ENOSYS;
3138         }
3139         /* not reached */
3140 }
3141
3142 static int video_read(char *p)
3143 {
3144         int status, autosw;
3145         int len = 0;
3146
3147         if (video_supported == TPACPI_VIDEO_NONE) {
3148                 len += sprintf(p + len, "status:\t\tnot supported\n");
3149                 return len;
3150         }
3151
3152         status = video_outputsw_get();
3153         if (status < 0)
3154                 return status;
3155
3156         autosw = video_autosw_get();
3157         if (autosw < 0)
3158                 return autosw;
3159
3160         len += sprintf(p + len, "status:\t\tsupported\n");
3161         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3162         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3163         if (video_supported == TPACPI_VIDEO_NEW)
3164                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3165         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3166         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3167         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3168         if (video_supported == TPACPI_VIDEO_NEW)
3169                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3170         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3171         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3172
3173         return len;
3174 }
3175
3176 static int video_write(char *buf)
3177 {
3178         char *cmd;
3179         int enable, disable, status;
3180         int res;
3181
3182         if (video_supported == TPACPI_VIDEO_NONE)
3183                 return -ENODEV;
3184
3185         enable = 0;
3186         disable = 0;
3187
3188         while ((cmd = next_cmd(&buf))) {
3189                 if (strlencmp(cmd, "lcd_enable") == 0) {
3190                         enable |= TP_ACPI_VIDEO_S_LCD;
3191                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3192                         disable |= TP_ACPI_VIDEO_S_LCD;
3193                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3194                         enable |= TP_ACPI_VIDEO_S_CRT;
3195                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3196                         disable |= TP_ACPI_VIDEO_S_CRT;
3197                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3198                            strlencmp(cmd, "dvi_enable") == 0) {
3199                         enable |= TP_ACPI_VIDEO_S_DVI;
3200                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3201                            strlencmp(cmd, "dvi_disable") == 0) {
3202                         disable |= TP_ACPI_VIDEO_S_DVI;
3203                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3204                         res = video_autosw_set(1);
3205                         if (res)
3206                                 return res;
3207                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3208                         res = video_autosw_set(0);
3209                         if (res)
3210                                 return res;
3211                 } else if (strlencmp(cmd, "video_switch") == 0) {
3212                         res = video_outputsw_cycle();
3213                         if (res)
3214                                 return res;
3215                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3216                         res = video_expand_toggle();
3217                         if (res)
3218                                 return res;
3219                 } else
3220                         return -EINVAL;
3221         }
3222
3223         if (enable || disable) {
3224                 status = video_outputsw_get();
3225                 if (status < 0)
3226                         return status;
3227                 res = video_outputsw_set((status & ~disable) | enable);
3228                 if (res)
3229                         return res;
3230         }
3231
3232         return 0;
3233 }
3234
3235 static struct ibm_struct video_driver_data = {
3236         .name = "video",
3237         .read = video_read,
3238         .write = video_write,
3239         .exit = video_exit,
3240 };
3241
3242 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3243
3244 /*************************************************************************
3245  * Light (thinklight) subdriver
3246  */
3247
3248 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3249 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3250
3251 static int light_get_status(void)
3252 {
3253         int status = 0;
3254
3255         if (tp_features.light_status) {
3256                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3257                         return -EIO;
3258                 return (!!status);
3259         }
3260
3261         return -ENXIO;
3262 }
3263
3264 static int light_set_status(int status)
3265 {
3266         int rc;
3267
3268         if (tp_features.light) {
3269                 if (cmos_handle) {
3270                         rc = acpi_evalf(cmos_handle, NULL, NULL, "vd",
3271                                         (status)?
3272                                                 TP_CMOS_THINKLIGHT_ON :
3273                                                 TP_CMOS_THINKLIGHT_OFF);
3274                 } else {
3275                         rc = acpi_evalf(lght_handle, NULL, NULL, "vd",
3276                                         (status)? 1 : 0);
3277                 }
3278                 return (rc)? 0 : -EIO;
3279         }
3280
3281         return -ENXIO;
3282 }
3283
3284 static void light_set_status_worker(struct work_struct *work)
3285 {
3286         struct tpacpi_led_classdev *data =
3287                         container_of(work, struct tpacpi_led_classdev, work);
3288
3289         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3290                 light_set_status((data->new_brightness != LED_OFF));
3291 }
3292
3293 static void light_sysfs_set(struct led_classdev *led_cdev,
3294                         enum led_brightness brightness)
3295 {
3296         struct tpacpi_led_classdev *data =
3297                 container_of(led_cdev,
3298                              struct tpacpi_led_classdev,
3299                              led_classdev);
3300         data->new_brightness = brightness;
3301         schedule_work(&data->work);
3302 }
3303
3304 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev)
3305 {
3306         return (light_get_status() == 1)? LED_FULL : LED_OFF;
3307 }
3308
3309 static struct tpacpi_led_classdev tpacpi_led_thinklight = {
3310         .led_classdev = {
3311                 .name           = "tpacpi::thinklight",
3312                 .brightness_set = &light_sysfs_set,
3313                 .brightness_get = &light_sysfs_get,
3314         }
3315 };
3316
3317 static int __init light_init(struct ibm_init_struct *iibm)
3318 {
3319         int rc = 0;
3320
3321         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3322
3323         TPACPI_ACPIHANDLE_INIT(ledb);
3324         TPACPI_ACPIHANDLE_INIT(lght);
3325         TPACPI_ACPIHANDLE_INIT(cmos);
3326         INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker);
3327
3328         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3329         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3330
3331         if (tp_features.light)
3332                 /* light status not supported on
3333                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3334                 tp_features.light_status =
3335                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3336
3337         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3338                 str_supported(tp_features.light));
3339
3340         if (tp_features.light) {
3341                 rc = led_classdev_register(&tpacpi_pdev->dev,
3342                                            &tpacpi_led_thinklight.led_classdev);
3343         }
3344
3345         if (rc < 0) {
3346                 tp_features.light = 0;
3347                 tp_features.light_status = 0;
3348         } else {
3349                 rc = (tp_features.light)? 0 : 1;
3350         }
3351         return rc;
3352 }
3353
3354 static void light_exit(void)
3355 {
3356         led_classdev_unregister(&tpacpi_led_thinklight.led_classdev);
3357         if (work_pending(&tpacpi_led_thinklight.work))
3358                 flush_scheduled_work();
3359 }
3360
3361 static int light_read(char *p)
3362 {
3363         int len = 0;
3364         int status;
3365
3366         if (!tp_features.light) {
3367                 len += sprintf(p + len, "status:\t\tnot supported\n");
3368         } else if (!tp_features.light_status) {
3369                 len += sprintf(p + len, "status:\t\tunknown\n");
3370                 len += sprintf(p + len, "commands:\ton, off\n");
3371         } else {
3372                 status = light_get_status();
3373                 if (status < 0)
3374                         return status;
3375                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3376                 len += sprintf(p + len, "commands:\ton, off\n");
3377         }
3378
3379         return len;
3380 }
3381
3382 static int light_write(char *buf)
3383 {
3384         char *cmd;
3385         int newstatus = 0;
3386
3387         if (!tp_features.light)
3388                 return -ENODEV;
3389
3390         while ((cmd = next_cmd(&buf))) {
3391                 if (strlencmp(cmd, "on") == 0) {
3392                         newstatus = 1;
3393                 } else if (strlencmp(cmd, "off") == 0) {
3394                         newstatus = 0;
3395                 } else
3396                         return -EINVAL;
3397         }
3398
3399         return light_set_status(newstatus);
3400 }
3401
3402 static struct ibm_struct light_driver_data = {
3403         .name = "light",
3404         .read = light_read,
3405         .write = light_write,
3406         .exit = light_exit,
3407 };
3408
3409 /*************************************************************************
3410  * Dock subdriver
3411  */
3412
3413 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3414
3415 static void dock_notify(struct ibm_struct *ibm, u32 event);
3416 static int dock_read(char *p);
3417 static int dock_write(char *buf);
3418
3419 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3420            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3421            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3422            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3423     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3424
3425 /* don't list other alternatives as we install a notify handler on the 570 */
3426 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3427
3428 static const struct acpi_device_id ibm_pci_device_ids[] = {
3429         {PCI_ROOT_HID_STRING, 0},
3430         {"", 0},
3431 };
3432
3433 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3434         {
3435          .notify = dock_notify,
3436          .handle = &dock_handle,
3437          .type = ACPI_SYSTEM_NOTIFY,
3438         },
3439         {
3440         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3441          * We just use it to get notifications of dock hotplug
3442          * in very old thinkpads */
3443          .hid = ibm_pci_device_ids,
3444          .notify = dock_notify,
3445          .handle = &pci_handle,
3446          .type = ACPI_SYSTEM_NOTIFY,
3447         },
3448 };
3449
3450 static struct ibm_struct dock_driver_data[2] = {
3451         {
3452          .name = "dock",
3453          .read = dock_read,
3454          .write = dock_write,
3455          .acpi = &ibm_dock_acpidriver[0],
3456         },
3457         {
3458          .name = "dock",
3459          .acpi = &ibm_dock_acpidriver[1],
3460         },
3461 };
3462
3463 #define dock_docked() (_sta(dock_handle) & 1)
3464
3465 static int __init dock_init(struct ibm_init_struct *iibm)
3466 {
3467         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3468
3469         TPACPI_ACPIHANDLE_INIT(dock);
3470
3471         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3472                 str_supported(dock_handle != NULL));
3473
3474         return (dock_handle)? 0 : 1;
3475 }
3476
3477 static int __init dock_init2(struct ibm_init_struct *iibm)
3478 {
3479         int dock2_needed;
3480
3481         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3482
3483         if (dock_driver_data[0].flags.acpi_driver_registered &&
3484             dock_driver_data[0].flags.acpi_notify_installed) {
3485                 TPACPI_ACPIHANDLE_INIT(pci);
3486                 dock2_needed = (pci_handle != NULL);
3487                 vdbg_printk(TPACPI_DBG_INIT,
3488                             "dock PCI handler for the TP 570 is %s\n",
3489                             str_supported(dock2_needed));
3490         } else {
3491                 vdbg_printk(TPACPI_DBG_INIT,
3492                 "dock subdriver part 2 not required\n");
3493                 dock2_needed = 0;
3494         }
3495
3496         return (dock2_needed)? 0 : 1;
3497 }
3498
3499 static void dock_notify(struct ibm_struct *ibm, u32 event)
3500 {
3501         int docked = dock_docked();
3502         int pci = ibm->acpi->hid && ibm->acpi->device &&
3503                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3504         int data;
3505
3506         if (event == 1 && !pci) /* 570 */
3507                 data = 1;       /* button */
3508         else if (event == 1 && pci)     /* 570 */
3509                 data = 3;       /* dock */
3510         else if (event == 3 && docked)
3511                 data = 1;       /* button */
3512         else if (event == 3 && !docked)
3513                 data = 2;       /* undock */
3514         else if (event == 0 && docked)
3515                 data = 3;       /* dock */
3516         else {
3517                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3518                        event, _sta(dock_handle));
3519                 data = 0;       /* unknown */
3520         }
3521         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3522         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3523                                           ibm->acpi->device->dev.bus_id,
3524                                           event, data);
3525 }
3526
3527 static int dock_read(char *p)
3528 {
3529         int len = 0;
3530         int docked = dock_docked();
3531
3532         if (!dock_handle)
3533                 len += sprintf(p + len, "status:\t\tnot supported\n");
3534         else if (!docked)
3535                 len += sprintf(p + len, "status:\t\tundocked\n");
3536         else {
3537                 len += sprintf(p + len, "status:\t\tdocked\n");
3538                 len += sprintf(p + len, "commands:\tdock, undock\n");
3539         }
3540
3541         return len;
3542 }
3543
3544 static int dock_write(char *buf)
3545 {
3546         char *cmd;
3547
3548         if (!dock_docked())
3549                 return -ENODEV;
3550
3551         while ((cmd = next_cmd(&buf))) {
3552                 if (strlencmp(cmd, "undock") == 0) {
3553                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3554                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3555                                 return -EIO;
3556                 } else if (strlencmp(cmd, "dock") == 0) {
3557                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3558                                 return -EIO;
3559                 } else
3560                         return -EINVAL;
3561         }
3562
3563         return 0;
3564 }
3565
3566 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3567
3568 /*************************************************************************
3569  * Bay subdriver
3570  */
3571
3572 #ifdef CONFIG_THINKPAD_ACPI_BAY
3573
3574 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3575            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3576            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3577            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3578            );                           /* A21e, R30, R31 */
3579 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3580            "_EJ0",              /* all others */
3581            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3582 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3583            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3584            );                           /* all others */
3585 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3586            "_EJ0",                      /* 770x */
3587            );                           /* all others */
3588
3589 static int __init bay_init(struct ibm_init_struct *iibm)
3590 {
3591         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3592
3593         TPACPI_ACPIHANDLE_INIT(bay);
3594         if (bay_handle)
3595                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3596         TPACPI_ACPIHANDLE_INIT(bay2);
3597         if (bay2_handle)
3598                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3599
3600         tp_features.bay_status = bay_handle &&
3601                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3602         tp_features.bay_status2 = bay2_handle &&
3603                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3604
3605         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3606                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3607         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3608                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3609
3610         vdbg_printk(TPACPI_DBG_INIT,
3611                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3612                 str_supported(tp_features.bay_status),
3613                 str_supported(tp_features.bay_eject),
3614                 str_supported(tp_features.bay_status2),
3615                 str_supported(tp_features.bay_eject2));
3616
3617         return (tp_features.bay_status || tp_features.bay_eject ||
3618                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3619 }
3620
3621 static void bay_notify(struct ibm_struct *ibm, u32 event)
3622 {
3623         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3624         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3625                                           ibm->acpi->device->dev.bus_id,
3626                                           event, 0);
3627 }
3628
3629 #define bay_occupied(b) (_sta(b##_handle) & 1)
3630
3631 static int bay_read(char *p)
3632 {
3633         int len = 0;
3634         int occupied = bay_occupied(bay);
3635         int occupied2 = bay_occupied(bay2);
3636         int eject, eject2;
3637
3638         len += sprintf(p + len, "status:\t\t%s\n",
3639                 tp_features.bay_status ?
3640                         (occupied ? "occupied" : "unoccupied") :
3641                                 "not supported");
3642         if (tp_features.bay_status2)
3643                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3644                                "occupied" : "unoccupied");
3645
3646         eject = tp_features.bay_eject && occupied;
3647         eject2 = tp_features.bay_eject2 && occupied2;
3648
3649         if (eject && eject2)
3650                 len += sprintf(p + len, "commands:\teject, eject2\n");
3651         else if (eject)
3652                 len += sprintf(p + len, "commands:\teject\n");
3653         else if (eject2)
3654                 len += sprintf(p + len, "commands:\teject2\n");
3655
3656         return len;
3657 }
3658
3659 static int bay_write(char *buf)
3660 {
3661         char *cmd;
3662
3663         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3664                 return -ENODEV;
3665
3666         while ((cmd = next_cmd(&buf))) {
3667                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3668                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3669                                 return -EIO;
3670                 } else if (tp_features.bay_eject2 &&
3671                            strlencmp(cmd, "eject2") == 0) {
3672                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3673                                 return -EIO;
3674                 } else
3675                         return -EINVAL;
3676         }
3677
3678         return 0;
3679 }
3680
3681 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3682         .notify = bay_notify,
3683         .handle = &bay_handle,
3684         .type = ACPI_SYSTEM_NOTIFY,
3685 };
3686
3687 static struct ibm_struct bay_driver_data = {
3688         .name = "bay",
3689         .read = bay_read,
3690         .write = bay_write,
3691         .acpi = &ibm_bay_acpidriver,
3692 };
3693
3694 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3695
3696 /*************************************************************************
3697  * CMOS subdriver
3698  */
3699
3700 /* sysfs cmos_command -------------------------------------------------- */
3701 static ssize_t cmos_command_store(struct device *dev,
3702                             struct device_attribute *attr,
3703                             const char *buf, size_t count)
3704 {
3705         unsigned long cmos_cmd;
3706         int res;
3707
3708         if (parse_strtoul(buf, 21, &cmos_cmd))
3709                 return -EINVAL;
3710
3711         res = issue_thinkpad_cmos_command(cmos_cmd);
3712         return (res)? res : count;
3713 }
3714
3715 static struct device_attribute dev_attr_cmos_command =
3716         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3717
3718 /* --------------------------------------------------------------------- */
3719
3720 static int __init cmos_init(struct ibm_init_struct *iibm)
3721 {
3722         int res;
3723
3724         vdbg_printk(TPACPI_DBG_INIT,
3725                 "initializing cmos commands subdriver\n");
3726
3727         TPACPI_ACPIHANDLE_INIT(cmos);
3728
3729         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3730                 str_supported(cmos_handle != NULL));
3731
3732         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3733         if (res)
3734                 return res;
3735
3736         return (cmos_handle)? 0 : 1;
3737 }
3738
3739 static void cmos_exit(void)
3740 {
3741         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3742 }
3743
3744 static int cmos_read(char *p)
3745 {
3746         int len = 0;
3747
3748         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3749            R30, R31, T20-22, X20-21 */
3750         if (!cmos_handle)
3751                 len += sprintf(p + len, "status:\t\tnot supported\n");
3752         else {
3753                 len += sprintf(p + len, "status:\t\tsupported\n");
3754                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3755         }
3756
3757         return len;
3758 }
3759
3760 static int cmos_write(char *buf)
3761 {
3762         char *cmd;
3763         int cmos_cmd, res;
3764
3765         while ((cmd = next_cmd(&buf))) {
3766                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3767                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3768                         /* cmos_cmd set */
3769                 } else
3770                         return -EINVAL;
3771
3772                 res = issue_thinkpad_cmos_command(cmos_cmd);
3773                 if (res)
3774                         return res;
3775         }
3776
3777         return 0;
3778 }
3779
3780 static struct ibm_struct cmos_driver_data = {
3781         .name = "cmos",
3782         .read = cmos_read,
3783         .write = cmos_write,
3784         .exit = cmos_exit,
3785 };
3786
3787 /*************************************************************************
3788  * LED subdriver
3789  */
3790
3791 enum led_access_mode {
3792         TPACPI_LED_NONE = 0,
3793         TPACPI_LED_570, /* 570 */
3794         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3795         TPACPI_LED_NEW, /* all others */
3796 };
3797
3798 enum {  /* For TPACPI_LED_OLD */
3799         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3800         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3801         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3802 };
3803
3804 enum led_status_t {
3805         TPACPI_LED_OFF = 0,
3806         TPACPI_LED_ON,
3807         TPACPI_LED_BLINK,
3808 };
3809
3810 static enum led_access_mode led_supported;
3811
3812 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3813            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3814                                 /* T20-22, X20-21 */
3815            "LED",               /* all others */
3816            );                   /* R30, R31 */
3817
3818 #define TPACPI_LED_NUMLEDS 8
3819 static struct tpacpi_led_classdev *tpacpi_leds;
3820 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS];
3821 static const char const *tpacpi_led_names[TPACPI_LED_NUMLEDS] = {
3822         /* there's a limit of 19 chars + NULL before 2.6.26 */
3823         "tpacpi::power",
3824         "tpacpi:orange:batt",
3825         "tpacpi:green:batt",
3826         "tpacpi::dock_active",
3827         "tpacpi::bay_active",
3828         "tpacpi::dock_batt",
3829         "tpacpi::unknown_led",
3830         "tpacpi::standby",
3831 };
3832
3833 static int led_get_status(unsigned int led)
3834 {
3835         int status;
3836         enum led_status_t led_s;
3837
3838         switch (led_supported) {
3839         case TPACPI_LED_570:
3840                 if (!acpi_evalf(ec_handle,
3841                                 &status, "GLED", "dd", 1 << led))
3842                         return -EIO;
3843                 led_s = (status == 0)?
3844                                 TPACPI_LED_OFF :
3845                                 ((status == 1)?
3846                                         TPACPI_LED_ON :
3847                                         TPACPI_LED_BLINK);
3848                 tpacpi_led_state_cache[led] = led_s;
3849                 return led_s;
3850         default:
3851                 return -ENXIO;
3852         }
3853
3854         /* not reached */
3855 }
3856
3857 static int led_set_status(unsigned int led, enum led_status_t ledstatus)
3858 {
3859         /* off, on, blink. Index is led_status_t */
3860         static const int const led_sled_arg1[] = { 0, 1, 3 };
3861         static const int const led_exp_hlbl[] = { 0, 0, 1 };    /* led# * */
3862         static const int const led_exp_hlcl[] = { 0, 1, 1 };    /* led# * */
3863         static const int const led_led_arg1[] = { 0, 0x80, 0xc0 };
3864
3865         int rc = 0;
3866
3867         switch (led_supported) {
3868         case TPACPI_LED_570:
3869                         /* 570 */
3870                         led = 1 << led;
3871                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3872                                         led, led_sled_arg1[ledstatus]))
3873                                 rc = -EIO;
3874                         break;
3875         case TPACPI_LED_OLD:
3876                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3877                         led = 1 << led;
3878                         rc = ec_write(TPACPI_LED_EC_HLMS, led);
3879                         if (rc >= 0)
3880                                 rc = ec_write(TPACPI_LED_EC_HLBL,
3881                                               led * led_exp_hlbl[ledstatus]);
3882                         if (rc >= 0)
3883                                 rc = ec_write(TPACPI_LED_EC_HLCL,
3884                                               led * led_exp_hlcl[ledstatus]);
3885                         break;
3886         case TPACPI_LED_NEW:
3887                         /* all others */
3888                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3889                                         led, led_led_arg1[ledstatus]))
3890                                 rc = -EIO;
3891                         break;
3892         default:
3893                 rc = -ENXIO;
3894         }
3895
3896         if (!rc)
3897                 tpacpi_led_state_cache[led] = ledstatus;
3898
3899         return rc;
3900 }
3901
3902 static void led_sysfs_set_status(unsigned int led,
3903                                  enum led_brightness brightness)
3904 {
3905         led_set_status(led,
3906                         (brightness == LED_OFF) ?
3907                         TPACPI_LED_OFF :
3908                         (tpacpi_led_state_cache[led] == TPACPI_LED_BLINK) ?
3909                                 TPACPI_LED_BLINK : TPACPI_LED_ON);
3910 }
3911
3912 static void led_set_status_worker(struct work_struct *work)
3913 {
3914         struct tpacpi_led_classdev *data =
3915                 container_of(work, struct tpacpi_led_classdev, work);
3916
3917         if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING))
3918                 led_sysfs_set_status(data->led, data->new_brightness);
3919 }
3920
3921 static void led_sysfs_set(struct led_classdev *led_cdev,
3922                         enum led_brightness brightness)
3923 {
3924         struct tpacpi_led_classdev *data = container_of(led_cdev,
3925                              struct tpacpi_led_classdev, led_classdev);
3926
3927         data->new_brightness = brightness;
3928         schedule_work(&data->work);
3929 }
3930
3931 static int led_sysfs_blink_set(struct led_classdev *led_cdev,
3932                         unsigned long *delay_on, unsigned long *delay_off)
3933 {
3934         struct tpacpi_led_classdev *data = container_of(led_cdev,
3935                              struct tpacpi_led_classdev, led_classdev);
3936
3937         /* Can we choose the flash rate? */
3938         if (*delay_on == 0 && *delay_off == 0) {
3939                 /* yes. set them to the hardware blink rate (1 Hz) */
3940                 *delay_on = 500; /* ms */
3941                 *delay_off = 500; /* ms */
3942         } else if ((*delay_on != 500) || (*delay_off != 500))
3943                 return -EINVAL;
3944
3945         data->new_brightness = TPACPI_LED_BLINK;
3946         schedule_work(&data->work);
3947
3948         return 0;
3949 }
3950
3951 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev)
3952 {
3953         int rc;
3954
3955         struct tpacpi_led_classdev *data = container_of(led_cdev,
3956                              struct tpacpi_led_classdev, led_classdev);
3957
3958         rc = led_get_status(data->led);
3959
3960         if (rc == TPACPI_LED_OFF || rc < 0)
3961                 rc = LED_OFF;   /* no error handling in led class :( */
3962         else
3963                 rc = LED_FULL;
3964
3965         return rc;
3966 }
3967
3968 static void led_exit(void)
3969 {
3970         unsigned int i;
3971
3972         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
3973                 if (tpacpi_leds[i].led_classdev.name)
3974                         led_classdev_unregister(&tpacpi_leds[i].led_classdev);
3975         }
3976
3977         kfree(tpacpi_leds);
3978         tpacpi_leds = NULL;
3979 }
3980
3981 static int __init led_init(struct ibm_init_struct *iibm)
3982 {
3983         unsigned int i;
3984         int rc;
3985
3986         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3987
3988         TPACPI_ACPIHANDLE_INIT(led);
3989
3990         if (!led_handle)
3991                 /* led not supported on R30, R31 */
3992                 led_supported = TPACPI_LED_NONE;
3993         else if (strlencmp(led_path, "SLED") == 0)
3994                 /* 570 */
3995                 led_supported = TPACPI_LED_570;
3996         else if (strlencmp(led_path, "SYSL") == 0)
3997                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3998                 led_supported = TPACPI_LED_OLD;
3999         else
4000                 /* all others */
4001                 led_supported = TPACPI_LED_NEW;
4002
4003         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
4004                 str_supported(led_supported), led_supported);
4005
4006         tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS,
4007                               GFP_KERNEL);
4008         if (!tpacpi_leds) {
4009                 printk(TPACPI_ERR "Out of memory for LED data\n");
4010                 return -ENOMEM;
4011         }
4012
4013         for (i = 0; i < TPACPI_LED_NUMLEDS; i++) {
4014                 tpacpi_leds[i].led = i;
4015
4016                 tpacpi_leds[i].led_classdev.brightness_set = &led_sysfs_set;
4017                 tpacpi_leds[i].led_classdev.blink_set = &led_sysfs_blink_set;
4018                 if (led_supported == TPACPI_LED_570)
4019                         tpacpi_leds[i].led_classdev.brightness_get =
4020                                                         &led_sysfs_get;
4021
4022                 tpacpi_leds[i].led_classdev.name = tpacpi_led_names[i];
4023
4024                 INIT_WORK(&tpacpi_leds[i].work, led_set_status_worker);
4025
4026                 rc = led_classdev_register(&tpacpi_pdev->dev,
4027                                            &tpacpi_leds[i].led_classdev);
4028                 if (rc < 0) {
4029                         tpacpi_leds[i].led_classdev.name = NULL;
4030                         led_exit();
4031                         return rc;
4032                 }
4033         }
4034
4035         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
4036 }
4037
4038 #define str_led_status(s) \
4039         ((s) == TPACPI_LED_OFF ? "off" : \
4040                 ((s) == TPACPI_LED_ON ? "on" : "blinking"))
4041
4042 static int led_read(char *p)
4043 {
4044         int len = 0;
4045
4046         if (!led_supported) {
4047                 len += sprintf(p + len, "status:\t\tnot supported\n");
4048                 return len;
4049         }
4050         len += sprintf(p + len, "status:\t\tsupported\n");
4051
4052         if (led_supported == TPACPI_LED_570) {
4053                 /* 570 */
4054                 int i, status;
4055                 for (i = 0; i < 8; i++) {
4056                         status = led_get_status(i);
4057                         if (status < 0)
4058                                 return -EIO;
4059                         len += sprintf(p + len, "%d:\t\t%s\n",
4060                                        i, str_led_status(status));
4061                 }
4062         }
4063
4064         len += sprintf(p + len, "commands:\t"
4065                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
4066
4067         return len;
4068 }
4069
4070 static int led_write(char *buf)
4071 {
4072         char *cmd;
4073         int led, rc;
4074         enum led_status_t s;
4075
4076         if (!led_supported)
4077                 return -ENODEV;
4078
4079         while ((cmd = next_cmd(&buf))) {
4080                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
4081                         return -EINVAL;
4082
4083                 if (strstr(cmd, "off")) {
4084                         s = TPACPI_LED_OFF;
4085                 } else if (strstr(cmd, "on")) {
4086                         s = TPACPI_LED_ON;
4087                 } else if (strstr(cmd, "blink")) {
4088                         s = TPACPI_LED_BLINK;
4089                 } else {
4090                         return -EINVAL;
4091                 }
4092
4093                 rc = led_set_status(led, s);
4094                 if (rc < 0)
4095                         return rc;
4096         }
4097
4098         return 0;
4099 }
4100
4101 static struct ibm_struct led_driver_data = {
4102         .name = "led",
4103         .read = led_read,
4104         .write = led_write,
4105         .exit = led_exit,
4106 };
4107
4108 /*************************************************************************
4109  * Beep subdriver
4110  */
4111
4112 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
4113
4114 static int __init beep_init(struct ibm_init_struct *iibm)
4115 {
4116         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
4117
4118         TPACPI_ACPIHANDLE_INIT(beep);
4119
4120         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
4121                 str_supported(beep_handle != NULL));
4122
4123         return (beep_handle)? 0 : 1;
4124 }
4125
4126 static int beep_read(char *p)
4127 {
4128         int len = 0;
4129
4130         if (!beep_handle)
4131                 len += sprintf(p + len, "status:\t\tnot supported\n");
4132         else {
4133                 len += sprintf(p + len, "status:\t\tsupported\n");
4134                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
4135         }
4136
4137         return len;
4138 }
4139
4140 static int beep_write(char *buf)
4141 {
4142         char *cmd;
4143         int beep_cmd;
4144
4145         if (!beep_handle)
4146                 return -ENODEV;
4147
4148         while ((cmd = next_cmd(&buf))) {
4149                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
4150                     beep_cmd >= 0 && beep_cmd <= 17) {
4151                         /* beep_cmd set */
4152                 } else
4153                         return -EINVAL;
4154                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
4155                         return -EIO;
4156         }
4157
4158         return 0;
4159 }
4160
4161 static struct ibm_struct beep_driver_data = {
4162         .name = "beep",
4163         .read = beep_read,
4164         .write = beep_write,
4165 };
4166
4167 /*************************************************************************
4168  * Thermal subdriver
4169  */
4170
4171 enum thermal_access_mode {
4172         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
4173         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
4174         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
4175         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
4176         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
4177 };
4178
4179 enum { /* TPACPI_THERMAL_TPEC_* */
4180         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
4181         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
4182         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
4183 };
4184
4185 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
4186 struct ibm_thermal_sensors_struct {
4187         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
4188 };
4189
4190 static enum thermal_access_mode thermal_read_mode;
4191
4192 /* idx is zero-based */
4193 static int thermal_get_sensor(int idx, s32 *value)
4194 {
4195         int t;
4196         s8 tmp;
4197         char tmpi[5];
4198
4199         t = TP_EC_THERMAL_TMP0;
4200
4201         switch (thermal_read_mode) {
4202 #if TPACPI_MAX_THERMAL_SENSORS >= 16
4203         case TPACPI_THERMAL_TPEC_16:
4204                 if (idx >= 8 && idx <= 15) {
4205                         t = TP_EC_THERMAL_TMP8;
4206                         idx -= 8;
4207                 }
4208                 /* fallthrough */
4209 #endif
4210         case TPACPI_THERMAL_TPEC_8:
4211                 if (idx <= 7) {
4212                         if (!acpi_ec_read(t + idx, &tmp))
4213                                 return -EIO;
4214                         *value = tmp * 1000;
4215                         return 0;
4216                 }
4217                 break;
4218
4219         case TPACPI_THERMAL_ACPI_UPDT:
4220                 if (idx <= 7) {
4221                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4222                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
4223                                 return -EIO;
4224                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4225                                 return -EIO;
4226                         *value = (t - 2732) * 100;
4227                         return 0;
4228                 }
4229                 break;
4230
4231         case TPACPI_THERMAL_ACPI_TMP07:
4232                 if (idx <= 7) {
4233                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
4234                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
4235                                 return -EIO;
4236                         if (t > 127 || t < -127)
4237                                 t = TP_EC_THERMAL_TMP_NA;
4238                         *value = t * 1000;
4239                         return 0;
4240                 }
4241                 break;
4242
4243         case TPACPI_THERMAL_NONE:
4244         default:
4245                 return -ENOSYS;
4246         }
4247
4248         return -EINVAL;
4249 }
4250
4251 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
4252 {
4253         int res, i;
4254         int n;
4255
4256         n = 8;
4257         i = 0;
4258
4259         if (!s)
4260                 return -EINVAL;
4261
4262         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
4263                 n = 16;
4264
4265         for (i = 0 ; i < n; i++) {
4266                 res = thermal_get_sensor(i, &s->temp[i]);
4267                 if (res)
4268                         return res;
4269         }
4270
4271         return n;
4272 }
4273
4274 /* sysfs temp##_input -------------------------------------------------- */
4275
4276 static ssize_t thermal_temp_input_show(struct device *dev,
4277                            struct device_attribute *attr,
4278                            char *buf)
4279 {
4280         struct sensor_device_attribute *sensor_attr =
4281                                         to_sensor_dev_attr(attr);
4282         int idx = sensor_attr->index;
4283         s32 value;
4284         int res;
4285
4286         res = thermal_get_sensor(idx, &value);
4287         if (res)
4288                 return res;
4289         if (value == TP_EC_THERMAL_TMP_NA * 1000)
4290                 return -ENXIO;
4291
4292         return snprintf(buf, PAGE_SIZE, "%d\n", value);
4293 }
4294
4295 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
4296          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
4297                      thermal_temp_input_show, NULL, _idxB)
4298
4299 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
4300         THERMAL_SENSOR_ATTR_TEMP(1, 0),
4301         THERMAL_SENSOR_ATTR_TEMP(2, 1),
4302         THERMAL_SENSOR_ATTR_TEMP(3, 2),
4303         THERMAL_SENSOR_ATTR_TEMP(4, 3),
4304         THERMAL_SENSOR_ATTR_TEMP(5, 4),
4305         THERMAL_SENSOR_ATTR_TEMP(6, 5),
4306         THERMAL_SENSOR_ATTR_TEMP(7, 6),
4307         THERMAL_SENSOR_ATTR_TEMP(8, 7),
4308         THERMAL_SENSOR_ATTR_TEMP(9, 8),
4309         THERMAL_SENSOR_ATTR_TEMP(10, 9),
4310         THERMAL_SENSOR_ATTR_TEMP(11, 10),
4311         THERMAL_SENSOR_ATTR_TEMP(12, 11),
4312         THERMAL_SENSOR_ATTR_TEMP(13, 12),
4313         THERMAL_SENSOR_ATTR_TEMP(14, 13),
4314         THERMAL_SENSOR_ATTR_TEMP(15, 14),
4315         THERMAL_SENSOR_ATTR_TEMP(16, 15),
4316 };
4317
4318 #define THERMAL_ATTRS(X) \
4319         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
4320
4321 static struct attribute *thermal_temp_input_attr[] = {
4322         THERMAL_ATTRS(8),
4323         THERMAL_ATTRS(9),
4324         THERMAL_ATTRS(10),
4325         THERMAL_ATTRS(11),
4326         THERMAL_ATTRS(12),
4327         THERMAL_ATTRS(13),
4328         THERMAL_ATTRS(14),
4329         THERMAL_ATTRS(15),
4330         THERMAL_ATTRS(0),
4331         THERMAL_ATTRS(1),
4332         THERMAL_ATTRS(2),
4333         THERMAL_ATTRS(3),
4334         THERMAL_ATTRS(4),
4335         THERMAL_ATTRS(5),
4336         THERMAL_ATTRS(6),
4337         THERMAL_ATTRS(7),
4338         NULL
4339 };
4340
4341 static const struct attribute_group thermal_temp_input16_group = {
4342         .attrs = thermal_temp_input_attr
4343 };
4344
4345 static const struct attribute_group thermal_temp_input8_group = {
4346         .attrs = &thermal_temp_input_attr[8]
4347 };
4348
4349 #undef THERMAL_SENSOR_ATTR_TEMP
4350 #undef THERMAL_ATTRS
4351
4352 /* --------------------------------------------------------------------- */
4353
4354 static int __init thermal_init(struct ibm_init_struct *iibm)
4355 {
4356         u8 t, ta1, ta2;
4357         int i;
4358         int acpi_tmp7;
4359         int res;
4360
4361         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
4362
4363         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
4364
4365         if (thinkpad_id.ec_model) {
4366                 /*
4367                  * Direct EC access mode: sensors at registers
4368                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
4369                  * non-implemented, thermal sensors return 0x80 when
4370                  * not available
4371                  */
4372
4373                 ta1 = ta2 = 0;
4374                 for (i = 0; i < 8; i++) {
4375                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
4376                                 ta1 |= t;
4377                         } else {
4378                                 ta1 = 0;
4379                                 break;
4380                         }
4381                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
4382                                 ta2 |= t;
4383                         } else {
4384                                 ta1 = 0;
4385                                 break;
4386                         }
4387                 }
4388                 if (ta1 == 0) {
4389                         /* This is sheer paranoia, but we handle it anyway */
4390                         if (acpi_tmp7) {
4391                                 printk(TPACPI_ERR
4392                                        "ThinkPad ACPI EC access misbehaving, "
4393                                        "falling back to ACPI TMPx access "
4394                                        "mode\n");
4395                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4396                         } else {
4397                                 printk(TPACPI_ERR
4398                                        "ThinkPad ACPI EC access misbehaving, "
4399                                        "disabling thermal sensors access\n");
4400                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4401                         }
4402                 } else {
4403                         thermal_read_mode =
4404                             (ta2 != 0) ?
4405                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4406                 }
4407         } else if (acpi_tmp7) {
4408                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4409                         /* 600e/x, 770e, 770x */
4410                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4411                 } else {
4412                         /* Standard ACPI TMPx access, max 8 sensors */
4413                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4414                 }
4415         } else {
4416                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4417                 thermal_read_mode = TPACPI_THERMAL_NONE;
4418         }
4419
4420         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4421                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4422                 thermal_read_mode);
4423
4424         switch (thermal_read_mode) {
4425         case TPACPI_THERMAL_TPEC_16:
4426                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4427                                 &thermal_temp_input16_group);
4428                 if (res)
4429                         return res;
4430                 break;
4431         case TPACPI_THERMAL_TPEC_8:
4432         case TPACPI_THERMAL_ACPI_TMP07:
4433         case TPACPI_THERMAL_ACPI_UPDT:
4434                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4435                                 &thermal_temp_input8_group);
4436                 if (res)
4437                         return res;
4438                 break;
4439         case TPACPI_THERMAL_NONE:
4440         default:
4441                 return 1;
4442         }
4443
4444         return 0;
4445 }
4446
4447 static void thermal_exit(void)
4448 {
4449         switch (thermal_read_mode) {
4450         case TPACPI_THERMAL_TPEC_16:
4451                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4452                                    &thermal_temp_input16_group);
4453                 break;
4454         case TPACPI_THERMAL_TPEC_8:
4455         case TPACPI_THERMAL_ACPI_TMP07:
4456         case TPACPI_THERMAL_ACPI_UPDT:
4457                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4458                                    &thermal_temp_input16_group);
4459                 break;
4460         case TPACPI_THERMAL_NONE:
4461         default:
4462                 break;
4463         }
4464 }
4465
4466 static int thermal_read(char *p)
4467 {
4468         int len = 0;
4469         int n, i;
4470         struct ibm_thermal_sensors_struct t;
4471
4472         n = thermal_get_sensors(&t);
4473         if (unlikely(n < 0))
4474                 return n;
4475
4476         len += sprintf(p + len, "temperatures:\t");
4477
4478         if (n > 0) {
4479                 for (i = 0; i < (n - 1); i++)
4480                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4481                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4482         } else
4483                 len += sprintf(p + len, "not supported\n");
4484
4485         return len;
4486 }
4487
4488 static struct ibm_struct thermal_driver_data = {
4489         .name = "thermal",
4490         .read = thermal_read,
4491         .exit = thermal_exit,
4492 };
4493
4494 /*************************************************************************
4495  * EC Dump subdriver
4496  */
4497
4498 static u8 ecdump_regs[256];
4499
4500 static int ecdump_read(char *p)
4501 {
4502         int len = 0;
4503         int i, j;
4504         u8 v;
4505
4506         len += sprintf(p + len, "EC      "
4507                        " +00 +01 +02 +03 +04 +05 +06 +07"
4508                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4509         for (i = 0; i < 256; i += 16) {
4510                 len += sprintf(p + len, "EC 0x%02x:", i);
4511                 for (j = 0; j < 16; j++) {
4512                         if (!acpi_ec_read(i + j, &v))
4513                                 break;
4514                         if (v != ecdump_regs[i + j])
4515                                 len += sprintf(p + len, " *%02x", v);
4516                         else
4517                                 len += sprintf(p + len, "  %02x", v);
4518                         ecdump_regs[i + j] = v;
4519                 }
4520                 len += sprintf(p + len, "\n");
4521                 if (j != 16)
4522                         break;
4523         }
4524
4525         /* These are way too dangerous to advertise openly... */
4526 #if 0
4527         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4528                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4529         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4530                        " (<offset> is 00-ff, <value> is 0-255)\n");
4531 #endif
4532         return len;
4533 }
4534
4535 static int ecdump_write(char *buf)
4536 {
4537         char *cmd;
4538         int i, v;
4539
4540         while ((cmd = next_cmd(&buf))) {
4541                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4542                         /* i and v set */
4543                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4544                         /* i and v set */
4545                 } else
4546                         return -EINVAL;
4547                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4548                         if (!acpi_ec_write(i, v))
4549                                 return -EIO;
4550                 } else
4551                         return -EINVAL;
4552         }
4553
4554         return 0;
4555 }
4556
4557 static struct ibm_struct ecdump_driver_data = {
4558         .name = "ecdump",
4559         .read = ecdump_read,
4560         .write = ecdump_write,
4561         .flags.experimental = 1,
4562 };
4563
4564 /*************************************************************************
4565  * Backlight/brightness subdriver
4566  */
4567
4568 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4569
4570 enum {
4571         TP_EC_BACKLIGHT = 0x31,
4572
4573         /* TP_EC_BACKLIGHT bitmasks */
4574         TP_EC_BACKLIGHT_LVLMSK = 0x1F,
4575         TP_EC_BACKLIGHT_CMDMSK = 0xE0,
4576         TP_EC_BACKLIGHT_MAPSW = 0x20,
4577 };
4578
4579 static struct backlight_device *ibm_backlight_device;
4580 static int brightness_mode;
4581 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4582
4583 static struct mutex brightness_mutex;
4584
4585 /*
4586  * ThinkPads can read brightness from two places: EC 0x31, or
4587  * CMOS NVRAM byte 0x5E, bits 0-3.
4588  *
4589  * EC 0x31 has the following layout
4590  *   Bit 7: unknown function
4591  *   Bit 6: unknown function
4592  *   Bit 5: Z: honour scale changes, NZ: ignore scale changes
4593  *   Bit 4: must be set to zero to avoid problems
4594  *   Bit 3-0: backlight brightness level
4595  *
4596  * brightness_get_raw returns status data in the EC 0x31 layout
4597  */
4598 static int brightness_get_raw(int *status)
4599 {
4600         u8 lec = 0, lcmos = 0, level = 0;
4601
4602         if (brightness_mode & 1) {
4603                 if (!acpi_ec_read(TP_EC_BACKLIGHT, &lec))
4604                         return -EIO;
4605                 level = lec & TP_EC_BACKLIGHT_LVLMSK;
4606         };
4607         if (brightness_mode & 2) {
4608                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4609                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4610                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4611                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4612                 level = lcmos;
4613         }
4614
4615         if (brightness_mode == 3) {
4616                 *status = lec;  /* Prefer EC, CMOS is just a backing store */
4617                 lec &= TP_EC_BACKLIGHT_LVLMSK;
4618                 if (lec == lcmos)
4619                         tp_warned.bright_cmos_ec_unsync = 0;
4620                 else {
4621                         if (!tp_warned.bright_cmos_ec_unsync) {
4622                                 printk(TPACPI_ERR
4623                                         "CMOS NVRAM (%u) and EC (%u) do not "
4624                                         "agree on display brightness level\n",
4625                                         (unsigned int) lcmos,
4626                                         (unsigned int) lec);
4627                                 tp_warned.bright_cmos_ec_unsync = 1;
4628                         }
4629                         return -EIO;
4630                 }
4631         } else {
4632                 *status = level;
4633         }
4634
4635         return 0;
4636 }
4637
4638 /* May return EINTR which can always be mapped to ERESTARTSYS */
4639 static int brightness_set(int value)
4640 {
4641         int cmos_cmd, inc, i, res;
4642         int current_value;
4643         int command_bits;
4644
4645         if (value > ((tp_features.bright_16levels)? 15 : 7) ||
4646             value < 0)
4647                 return -EINVAL;
4648
4649         res = mutex_lock_interruptible(&brightness_mutex);
4650         if (res < 0)
4651                 return res;
4652
4653         res = brightness_get_raw(&current_value);
4654         if (res < 0)
4655                 goto errout;
4656
4657         command_bits = current_value & TP_EC_BACKLIGHT_CMDMSK;
4658         current_value &= TP_EC_BACKLIGHT_LVLMSK;
4659
4660         cmos_cmd = value > current_value ?
4661                         TP_CMOS_BRIGHTNESS_UP :
4662                         TP_CMOS_BRIGHTNESS_DOWN;
4663         inc = (value > current_value)? 1 : -1;
4664
4665         res = 0;
4666         for (i = current_value; i != value; i += inc) {
4667                 if ((brightness_mode & 2) &&
4668                     issue_thinkpad_cmos_command(cmos_cmd)) {
4669                         res = -EIO;
4670                         goto errout;
4671                 }
4672                 if ((brightness_mode & 1) &&
4673                     !acpi_ec_write(TP_EC_BACKLIGHT,
4674                                    (i + inc) | command_bits)) {
4675                         res = -EIO;
4676                         goto errout;;
4677                 }
4678         }
4679
4680 errout:
4681         mutex_unlock(&brightness_mutex);
4682         return res;
4683 }
4684
4685 /* sysfs backlight class ----------------------------------------------- */
4686
4687 static int brightness_update_status(struct backlight_device *bd)
4688 {
4689         /* it is the backlight class's job (caller) to handle
4690          * EINTR and other errors properly */
4691         return brightness_set(
4692                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4693                  bd->props.power == FB_BLANK_UNBLANK) ?
4694                                 bd->props.brightness : 0);
4695 }
4696
4697 static int brightness_get(struct backlight_device *bd)
4698 {
4699         int status, res;
4700
4701         res = brightness_get_raw(&status);
4702         if (res < 0)
4703                 return 0; /* FIXME: teach backlight about error handling */
4704
4705         return status & TP_EC_BACKLIGHT_LVLMSK;
4706 }
4707
4708 static struct backlight_ops ibm_backlight_data = {
4709         .get_brightness = brightness_get,
4710         .update_status  = brightness_update_status,
4711 };
4712
4713 /* --------------------------------------------------------------------- */
4714
4715 static int __init brightness_init(struct ibm_init_struct *iibm)
4716 {
4717         int b;
4718
4719         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4720
4721         mutex_init(&brightness_mutex);
4722
4723         /*
4724          * We always attempt to detect acpi support, so as to switch
4725          * Lenovo Vista BIOS to ACPI brightness mode even if we are not
4726          * going to publish a backlight interface
4727          */
4728         b = tpacpi_check_std_acpi_brightness_support();
4729         if (b > 0) {
4730                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
4731                         printk(TPACPI_NOTICE
4732                                "Lenovo BIOS switched to ACPI backlight "
4733                                "control mode\n");
4734                 }
4735                 if (brightness_enable > 1) {
4736                         printk(TPACPI_NOTICE
4737                                "standard ACPI backlight interface "
4738                                "available, not loading native one...\n");
4739                         return 1;
4740                 }
4741         }
4742
4743         if (!brightness_enable) {
4744                 dbg_printk(TPACPI_DBG_INIT,
4745                            "brightness support disabled by "
4746                            "module parameter\n");
4747                 return 1;
4748         }
4749
4750         if (b > 16) {
4751                 printk(TPACPI_ERR
4752                        "Unsupported brightness interface, "
4753                        "please contact %s\n", TPACPI_MAIL);
4754                 return 1;
4755         }
4756         if (b == 16)
4757                 tp_features.bright_16levels = 1;
4758
4759         if (!brightness_mode) {
4760                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4761                         brightness_mode = 2;
4762                 else
4763                         brightness_mode = 3;
4764
4765                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4766                         brightness_mode);
4767         }
4768
4769         if (brightness_mode > 3)
4770                 return -EINVAL;
4771
4772         if (brightness_get_raw(&b) < 0)
4773                 return 1;
4774
4775         if (tp_features.bright_16levels)
4776                 printk(TPACPI_INFO
4777                        "detected a 16-level brightness capable ThinkPad\n");
4778
4779         ibm_backlight_device = backlight_device_register(
4780                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4781                                         &ibm_backlight_data);
4782         if (IS_ERR(ibm_backlight_device)) {
4783                 printk(TPACPI_ERR "Could not register backlight device\n");
4784                 return PTR_ERR(ibm_backlight_device);
4785         }
4786         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4787
4788         ibm_backlight_device->props.max_brightness =
4789                                 (tp_features.bright_16levels)? 15 : 7;
4790         ibm_backlight_device->props.brightness = b & TP_EC_BACKLIGHT_LVLMSK;
4791         backlight_update_status(ibm_backlight_device);
4792
4793         return 0;
4794 }
4795
4796 static void brightness_exit(void)
4797 {
4798         if (ibm_backlight_device) {
4799                 vdbg_printk(TPACPI_DBG_EXIT,
4800                             "calling backlight_device_unregister()\n");
4801                 backlight_device_unregister(ibm_backlight_device);
4802                 ibm_backlight_device = NULL;
4803         }
4804 }
4805
4806 static int brightness_read(char *p)
4807 {
4808         int len = 0;
4809         int level;
4810
4811         level = brightness_get(NULL);
4812         if (level < 0) {
4813                 len += sprintf(p + len, "level:\t\tunreadable\n");
4814         } else {
4815                 len += sprintf(p + len, "level:\t\t%d\n", level);
4816                 len += sprintf(p + len, "commands:\tup, down\n");
4817                 len += sprintf(p + len, "commands:\tlevel <level>"
4818                                " (<level> is 0-%d)\n",
4819                                (tp_features.bright_16levels) ? 15 : 7);
4820         }
4821
4822         return len;
4823 }
4824
4825 static int brightness_write(char *buf)
4826 {
4827         int level;
4828         int rc;
4829         char *cmd;
4830         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4831
4832         level = brightness_get(NULL);
4833         if (level < 0)
4834                 return level;
4835
4836         while ((cmd = next_cmd(&buf))) {
4837                 if (strlencmp(cmd, "up") == 0) {
4838                         if (level < max_level)
4839                                 level++;
4840                 } else if (strlencmp(cmd, "down") == 0) {
4841                         if (level > 0)
4842                                 level--;
4843                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4844                            level >= 0 && level <= max_level) {
4845                         /* new level set */
4846                 } else
4847                         return -EINVAL;
4848         }
4849
4850         /*
4851          * Now we know what the final level should be, so we try to set it.
4852          * Doing it this way makes the syscall restartable in case of EINTR
4853          */
4854         rc = brightness_set(level);
4855         return (rc == -EINTR)? ERESTARTSYS : rc;
4856 }
4857
4858 static struct ibm_struct brightness_driver_data = {
4859         .name = "brightness",
4860         .read = brightness_read,
4861         .write = brightness_write,
4862         .exit = brightness_exit,
4863 };
4864
4865 /*************************************************************************
4866  * Volume subdriver
4867  */
4868
4869 static int volume_offset = 0x30;
4870
4871 static int volume_read(char *p)
4872 {
4873         int len = 0;
4874         u8 level;
4875
4876         if (!acpi_ec_read(volume_offset, &level)) {
4877                 len += sprintf(p + len, "level:\t\tunreadable\n");
4878         } else {
4879                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4880                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4881                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4882                 len += sprintf(p + len, "commands:\tlevel <level>"
4883                                " (<level> is 0-15)\n");
4884         }
4885
4886         return len;
4887 }
4888
4889 static int volume_write(char *buf)
4890 {
4891         int cmos_cmd, inc, i;
4892         u8 level, mute;
4893         int new_level, new_mute;
4894         char *cmd;
4895
4896         while ((cmd = next_cmd(&buf))) {
4897                 if (!acpi_ec_read(volume_offset, &level))
4898                         return -EIO;
4899                 new_mute = mute = level & 0x40;
4900                 new_level = level = level & 0xf;
4901
4902                 if (strlencmp(cmd, "up") == 0) {
4903                         if (mute)
4904                                 new_mute = 0;
4905                         else
4906                                 new_level = level == 15 ? 15 : level + 1;
4907                 } else if (strlencmp(cmd, "down") == 0) {
4908                         if (mute)
4909                                 new_mute = 0;
4910                         else
4911                                 new_level = level == 0 ? 0 : level - 1;
4912                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4913                            new_level >= 0 && new_level <= 15) {
4914                         /* new_level set */
4915                 } else if (strlencmp(cmd, "mute") == 0) {
4916                         new_mute = 0x40;
4917                 } else
4918                         return -EINVAL;
4919
4920                 if (new_level != level) {
4921                         /* mute doesn't change */
4922
4923                         cmos_cmd = (new_level > level) ?
4924                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4925                         inc = new_level > level ? 1 : -1;
4926
4927                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4928                                      !acpi_ec_write(volume_offset, level)))
4929                                 return -EIO;
4930
4931                         for (i = level; i != new_level; i += inc)
4932                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4933                                     !acpi_ec_write(volume_offset, i + inc))
4934                                         return -EIO;
4935
4936                         if (mute &&
4937                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4938                              !acpi_ec_write(volume_offset, new_level + mute))) {
4939                                 return -EIO;
4940                         }
4941                 }
4942
4943                 if (new_mute != mute) {
4944                         /* level doesn't change */
4945
4946                         cmos_cmd = (new_mute) ?
4947                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4948
4949                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4950                             !acpi_ec_write(volume_offset, level + new_mute))
4951                                 return -EIO;
4952                 }
4953         }
4954
4955         return 0;
4956 }
4957
4958 static struct ibm_struct volume_driver_data = {
4959         .name = "volume",
4960         .read = volume_read,
4961         .write = volume_write,
4962 };
4963
4964 /*************************************************************************
4965  * Fan subdriver
4966  */
4967
4968 /*
4969  * FAN ACCESS MODES
4970  *
4971  * TPACPI_FAN_RD_ACPI_GFAN:
4972  *      ACPI GFAN method: returns fan level
4973  *
4974  *      see TPACPI_FAN_WR_ACPI_SFAN
4975  *      EC 0x2f (HFSP) not available if GFAN exists
4976  *
4977  * TPACPI_FAN_WR_ACPI_SFAN:
4978  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4979  *
4980  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
4981  *      it for writing.
4982  *
4983  * TPACPI_FAN_WR_TPEC:
4984  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
4985  *      Supported on almost all ThinkPads
4986  *
4987  *      Fan speed changes of any sort (including those caused by the
4988  *      disengaged mode) are usually done slowly by the firmware as the
4989  *      maximum ammount of fan duty cycle change per second seems to be
4990  *      limited.
4991  *
4992  *      Reading is not available if GFAN exists.
4993  *      Writing is not available if SFAN exists.
4994  *
4995  *      Bits
4996  *       7      automatic mode engaged;
4997  *              (default operation mode of the ThinkPad)
4998  *              fan level is ignored in this mode.
4999  *       6      full speed mode (takes precedence over bit 7);
5000  *              not available on all thinkpads.  May disable
5001  *              the tachometer while the fan controller ramps up
5002  *              the speed (which can take up to a few *minutes*).
5003  *              Speeds up fan to 100% duty-cycle, which is far above
5004  *              the standard RPM levels.  It is not impossible that
5005  *              it could cause hardware damage.
5006  *      5-3     unused in some models.  Extra bits for fan level
5007  *              in others, but still useless as all values above
5008  *              7 map to the same speed as level 7 in these models.
5009  *      2-0     fan level (0..7 usually)
5010  *                      0x00 = stop
5011  *                      0x07 = max (set when temperatures critical)
5012  *              Some ThinkPads may have other levels, see
5013  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
5014  *
5015  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
5016  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
5017  *      does so, its initial value is meaningless (0x07).
5018  *
5019  *      For firmware bugs, refer to:
5020  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5021  *
5022  *      ----
5023  *
5024  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
5025  *      Main fan tachometer reading (in RPM)
5026  *
5027  *      This register is present on all ThinkPads with a new-style EC, and
5028  *      it is known not to be present on the A21m/e, and T22, as there is
5029  *      something else in offset 0x84 according to the ACPI DSDT.  Other
5030  *      ThinkPads from this same time period (and earlier) probably lack the
5031  *      tachometer as well.
5032  *
5033  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
5034  *      was never fixed by IBM to report the EC firmware version string
5035  *      probably support the tachometer (like the early X models), so
5036  *      detecting it is quite hard.  We need more data to know for sure.
5037  *
5038  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
5039  *      might result.
5040  *
5041  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
5042  *      mode.
5043  *
5044  *      For firmware bugs, refer to:
5045  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
5046  *
5047  * TPACPI_FAN_WR_ACPI_FANS:
5048  *      ThinkPad X31, X40, X41.  Not available in the X60.
5049  *
5050  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
5051  *      high speed.  ACPI DSDT seems to map these three speeds to levels
5052  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
5053  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
5054  *
5055  *      The speeds are stored on handles
5056  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
5057  *
5058  *      There are three default speed sets, acessible as handles:
5059  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
5060  *
5061  *      ACPI DSDT switches which set is in use depending on various
5062  *      factors.
5063  *
5064  *      TPACPI_FAN_WR_TPEC is also available and should be used to
5065  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
5066  *      but the ACPI tables just mention level 7.
5067  */
5068
5069 enum {                                  /* Fan control constants */
5070         fan_status_offset = 0x2f,       /* EC register 0x2f */
5071         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
5072                                          * 0x84 must be read before 0x85 */
5073
5074         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
5075         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
5076
5077         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
5078 };
5079
5080 enum fan_status_access_mode {
5081         TPACPI_FAN_NONE = 0,            /* No fan status or control */
5082         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
5083         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
5084 };
5085
5086 enum fan_control_access_mode {
5087         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
5088         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
5089         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
5090         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
5091 };
5092
5093 enum fan_control_commands {
5094         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
5095         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
5096         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
5097                                                  * and also watchdog cmd */
5098 };
5099
5100 static int fan_control_allowed;
5101
5102 static enum fan_status_access_mode fan_status_access_mode;
5103 static enum fan_control_access_mode fan_control_access_mode;
5104 static enum fan_control_commands fan_control_commands;
5105
5106 static u8 fan_control_initial_status;
5107 static u8 fan_control_desired_level;
5108 static int fan_watchdog_maxinterval;
5109
5110 static struct mutex fan_mutex;
5111
5112 static void fan_watchdog_fire(struct work_struct *ignored);
5113 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
5114
5115 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
5116 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
5117            "\\FSPD",            /* 600e/x, 770e, 770x */
5118            );                   /* all others */
5119 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
5120            "JFNS",              /* 770x-JL */
5121            );                   /* all others */
5122
5123 /*
5124  * Call with fan_mutex held
5125  */
5126 static void fan_update_desired_level(u8 status)
5127 {
5128         if ((status &
5129              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5130                 if (status > 7)
5131                         fan_control_desired_level = 7;
5132                 else
5133                         fan_control_desired_level = status;
5134         }
5135 }
5136
5137 static int fan_get_status(u8 *status)
5138 {
5139         u8 s;
5140
5141         /* TODO:
5142          * Add TPACPI_FAN_RD_ACPI_FANS ? */
5143
5144         switch (fan_status_access_mode) {
5145         case TPACPI_FAN_RD_ACPI_GFAN:
5146                 /* 570, 600e/x, 770e, 770x */
5147
5148                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
5149                         return -EIO;
5150
5151                 if (likely(status))
5152                         *status = s & 0x07;
5153
5154                 break;
5155
5156         case TPACPI_FAN_RD_TPEC:
5157                 /* all except 570, 600e/x, 770e, 770x */
5158                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
5159                         return -EIO;
5160
5161                 if (likely(status))
5162                         *status = s;
5163
5164                 break;
5165
5166         default:
5167                 return -ENXIO;
5168         }
5169
5170         return 0;
5171 }
5172
5173 static int fan_get_status_safe(u8 *status)
5174 {
5175         int rc;
5176         u8 s;
5177
5178         if (mutex_lock_interruptible(&fan_mutex))
5179                 return -ERESTARTSYS;
5180         rc = fan_get_status(&s);
5181         if (!rc)
5182                 fan_update_desired_level(s);
5183         mutex_unlock(&fan_mutex);
5184
5185         if (status)
5186                 *status = s;
5187
5188         return rc;
5189 }
5190
5191 static int fan_get_speed(unsigned int *speed)
5192 {
5193         u8 hi, lo;
5194
5195         switch (fan_status_access_mode) {
5196         case TPACPI_FAN_RD_TPEC:
5197                 /* all except 570, 600e/x, 770e, 770x */
5198                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
5199                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
5200                         return -EIO;
5201
5202                 if (likely(speed))
5203                         *speed = (hi << 8) | lo;
5204
5205                 break;
5206
5207         default:
5208                 return -ENXIO;
5209         }
5210
5211         return 0;
5212 }
5213
5214 static int fan_set_level(int level)
5215 {
5216         if (!fan_control_allowed)
5217                 return -EPERM;
5218
5219         switch (fan_control_access_mode) {
5220         case TPACPI_FAN_WR_ACPI_SFAN:
5221                 if (level >= 0 && level <= 7) {
5222                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
5223                                 return -EIO;
5224                 } else
5225                         return -EINVAL;
5226                 break;
5227
5228         case TPACPI_FAN_WR_ACPI_FANS:
5229         case TPACPI_FAN_WR_TPEC:
5230                 if ((level != TP_EC_FAN_AUTO) &&
5231                     (level != TP_EC_FAN_FULLSPEED) &&
5232                     ((level < 0) || (level > 7)))
5233                         return -EINVAL;
5234
5235                 /* safety net should the EC not support AUTO
5236                  * or FULLSPEED mode bits and just ignore them */
5237                 if (level & TP_EC_FAN_FULLSPEED)
5238                         level |= 7;     /* safety min speed 7 */
5239                 else if (level & TP_EC_FAN_AUTO)
5240                         level |= 4;     /* safety min speed 4 */
5241
5242                 if (!acpi_ec_write(fan_status_offset, level))
5243                         return -EIO;
5244                 else
5245                         tp_features.fan_ctrl_status_undef = 0;
5246                 break;
5247
5248         default:
5249                 return -ENXIO;
5250         }
5251         return 0;
5252 }
5253
5254 static int fan_set_level_safe(int level)
5255 {
5256         int rc;
5257
5258         if (!fan_control_allowed)
5259                 return -EPERM;
5260
5261         if (mutex_lock_interruptible(&fan_mutex))
5262                 return -ERESTARTSYS;
5263
5264         if (level == TPACPI_FAN_LAST_LEVEL)
5265                 level = fan_control_desired_level;
5266
5267         rc = fan_set_level(level);
5268         if (!rc)
5269                 fan_update_desired_level(level);
5270
5271         mutex_unlock(&fan_mutex);
5272         return rc;
5273 }
5274
5275 static int fan_set_enable(void)
5276 {
5277         u8 s;
5278         int rc;
5279
5280         if (!fan_control_allowed)
5281                 return -EPERM;
5282
5283         if (mutex_lock_interruptible(&fan_mutex))
5284                 return -ERESTARTSYS;
5285
5286         switch (fan_control_access_mode) {
5287         case TPACPI_FAN_WR_ACPI_FANS:
5288         case TPACPI_FAN_WR_TPEC:
5289                 rc = fan_get_status(&s);
5290                 if (rc < 0)
5291                         break;
5292
5293                 /* Don't go out of emergency fan mode */
5294                 if (s != 7) {
5295                         s &= 0x07;
5296                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
5297                 }
5298
5299                 if (!acpi_ec_write(fan_status_offset, s))
5300                         rc = -EIO;
5301                 else {
5302                         tp_features.fan_ctrl_status_undef = 0;
5303                         rc = 0;
5304                 }
5305                 break;
5306
5307         case TPACPI_FAN_WR_ACPI_SFAN:
5308                 rc = fan_get_status(&s);
5309                 if (rc < 0)
5310                         break;
5311
5312                 s &= 0x07;
5313
5314                 /* Set fan to at least level 4 */
5315                 s |= 4;
5316
5317                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
5318                         rc = -EIO;
5319                 else
5320                         rc = 0;
5321                 break;
5322
5323         default:
5324                 rc = -ENXIO;
5325         }
5326
5327         mutex_unlock(&fan_mutex);
5328         return rc;
5329 }
5330
5331 static int fan_set_disable(void)
5332 {
5333         int rc;
5334
5335         if (!fan_control_allowed)
5336                 return -EPERM;
5337
5338         if (mutex_lock_interruptible(&fan_mutex))
5339                 return -ERESTARTSYS;
5340
5341         rc = 0;
5342         switch (fan_control_access_mode) {
5343         case TPACPI_FAN_WR_ACPI_FANS:
5344         case TPACPI_FAN_WR_TPEC:
5345                 if (!acpi_ec_write(fan_status_offset, 0x00))
5346                         rc = -EIO;
5347                 else {
5348                         fan_control_desired_level = 0;
5349                         tp_features.fan_ctrl_status_undef = 0;
5350                 }
5351                 break;
5352
5353         case TPACPI_FAN_WR_ACPI_SFAN:
5354                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
5355                         rc = -EIO;
5356                 else
5357                         fan_control_desired_level = 0;
5358                 break;
5359
5360         default:
5361                 rc = -ENXIO;
5362         }
5363
5364
5365         mutex_unlock(&fan_mutex);
5366         return rc;
5367 }
5368
5369 static int fan_set_speed(int speed)
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                 if (speed >= 0 && speed <= 65535) {
5383                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5384                                         speed, speed, speed))
5385                                 rc = -EIO;
5386                 } else
5387                         rc = -EINVAL;
5388                 break;
5389
5390         default:
5391                 rc = -ENXIO;
5392         }
5393
5394         mutex_unlock(&fan_mutex);
5395         return rc;
5396 }
5397
5398 static void fan_watchdog_reset(void)
5399 {
5400         static int fan_watchdog_active;
5401
5402         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5403                 return;
5404
5405         if (fan_watchdog_active)
5406                 cancel_delayed_work(&fan_watchdog_task);
5407
5408         if (fan_watchdog_maxinterval > 0 &&
5409             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5410                 fan_watchdog_active = 1;
5411                 if (!schedule_delayed_work(&fan_watchdog_task,
5412                                 msecs_to_jiffies(fan_watchdog_maxinterval
5413                                                  * 1000))) {
5414                         printk(TPACPI_ERR
5415                                "failed to schedule the fan watchdog, "
5416                                "watchdog will not trigger\n");
5417                 }
5418         } else
5419                 fan_watchdog_active = 0;
5420 }
5421
5422 static void fan_watchdog_fire(struct work_struct *ignored)
5423 {
5424         int rc;
5425
5426         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5427                 return;
5428
5429         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5430         rc = fan_set_enable();
5431         if (rc < 0) {
5432                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5433                         "will try again later...\n", -rc);
5434                 /* reschedule for later */
5435                 fan_watchdog_reset();
5436         }
5437 }
5438
5439 /*
5440  * SYSFS fan layout: hwmon compatible (device)
5441  *
5442  * pwm*_enable:
5443  *      0: "disengaged" mode
5444  *      1: manual mode
5445  *      2: native EC "auto" mode (recommended, hardware default)
5446  *
5447  * pwm*: set speed in manual mode, ignored otherwise.
5448  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5449  *      interpolation.
5450  *
5451  * fan*_input: tachometer reading, RPM
5452  *
5453  *
5454  * SYSFS fan layout: extensions
5455  *
5456  * fan_watchdog (driver):
5457  *      fan watchdog interval in seconds, 0 disables (default), max 120
5458  */
5459
5460 /* sysfs fan pwm1_enable ----------------------------------------------- */
5461 static ssize_t fan_pwm1_enable_show(struct device *dev,
5462                                     struct device_attribute *attr,
5463                                     char *buf)
5464 {
5465         int res, mode;
5466         u8 status;
5467
5468         res = fan_get_status_safe(&status);
5469         if (res)
5470                 return res;
5471
5472         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5473                 if (status != fan_control_initial_status) {
5474                         tp_features.fan_ctrl_status_undef = 0;
5475                 } else {
5476                         /* Return most likely status. In fact, it
5477                          * might be the only possible status */
5478                         status = TP_EC_FAN_AUTO;
5479                 }
5480         }
5481
5482         if (status & TP_EC_FAN_FULLSPEED) {
5483                 mode = 0;
5484         } else if (status & TP_EC_FAN_AUTO) {
5485                 mode = 2;
5486         } else
5487                 mode = 1;
5488
5489         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5490 }
5491
5492 static ssize_t fan_pwm1_enable_store(struct device *dev,
5493                                      struct device_attribute *attr,
5494                                      const char *buf, size_t count)
5495 {
5496         unsigned long t;
5497         int res, level;
5498
5499         if (parse_strtoul(buf, 2, &t))
5500                 return -EINVAL;
5501
5502         switch (t) {
5503         case 0:
5504                 level = TP_EC_FAN_FULLSPEED;
5505                 break;
5506         case 1:
5507                 level = TPACPI_FAN_LAST_LEVEL;
5508                 break;
5509         case 2:
5510                 level = TP_EC_FAN_AUTO;
5511                 break;
5512         case 3:
5513                 /* reserved for software-controlled auto mode */
5514                 return -ENOSYS;
5515         default:
5516                 return -EINVAL;
5517         }
5518
5519         res = fan_set_level_safe(level);
5520         if (res == -ENXIO)
5521                 return -EINVAL;
5522         else if (res < 0)
5523                 return res;
5524
5525         fan_watchdog_reset();
5526
5527         return count;
5528 }
5529
5530 static struct device_attribute dev_attr_fan_pwm1_enable =
5531         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5532                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5533
5534 /* sysfs fan pwm1 ------------------------------------------------------ */
5535 static ssize_t fan_pwm1_show(struct device *dev,
5536                              struct device_attribute *attr,
5537                              char *buf)
5538 {
5539         int res;
5540         u8 status;
5541
5542         res = fan_get_status_safe(&status);
5543         if (res)
5544                 return res;
5545
5546         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5547                 if (status != fan_control_initial_status) {
5548                         tp_features.fan_ctrl_status_undef = 0;
5549                 } else {
5550                         status = TP_EC_FAN_AUTO;
5551                 }
5552         }
5553
5554         if ((status &
5555              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5556                 status = fan_control_desired_level;
5557
5558         if (status > 7)
5559                 status = 7;
5560
5561         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5562 }
5563
5564 static ssize_t fan_pwm1_store(struct device *dev,
5565                               struct device_attribute *attr,
5566                               const char *buf, size_t count)
5567 {
5568         unsigned long s;
5569         int rc;
5570         u8 status, newlevel;
5571
5572         if (parse_strtoul(buf, 255, &s))
5573                 return -EINVAL;
5574
5575         /* scale down from 0-255 to 0-7 */
5576         newlevel = (s >> 5) & 0x07;
5577
5578         if (mutex_lock_interruptible(&fan_mutex))
5579                 return -ERESTARTSYS;
5580
5581         rc = fan_get_status(&status);
5582         if (!rc && (status &
5583                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5584                 rc = fan_set_level(newlevel);
5585                 if (rc == -ENXIO)
5586                         rc = -EINVAL;
5587                 else if (!rc) {
5588                         fan_update_desired_level(newlevel);
5589                         fan_watchdog_reset();
5590                 }
5591         }
5592
5593         mutex_unlock(&fan_mutex);
5594         return (rc)? rc : count;
5595 }
5596
5597 static struct device_attribute dev_attr_fan_pwm1 =
5598         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5599                 fan_pwm1_show, fan_pwm1_store);
5600
5601 /* sysfs fan fan1_input ------------------------------------------------ */
5602 static ssize_t fan_fan1_input_show(struct device *dev,
5603                            struct device_attribute *attr,
5604                            char *buf)
5605 {
5606         int res;
5607         unsigned int speed;
5608
5609         res = fan_get_speed(&speed);
5610         if (res < 0)
5611                 return res;
5612
5613         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5614 }
5615
5616 static struct device_attribute dev_attr_fan_fan1_input =
5617         __ATTR(fan1_input, S_IRUGO,
5618                 fan_fan1_input_show, NULL);
5619
5620 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5621 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5622                                      char *buf)
5623 {
5624         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5625 }
5626
5627 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5628                                       const char *buf, size_t count)
5629 {
5630         unsigned long t;
5631
5632         if (parse_strtoul(buf, 120, &t))
5633                 return -EINVAL;
5634
5635         if (!fan_control_allowed)
5636                 return -EPERM;
5637
5638         fan_watchdog_maxinterval = t;
5639         fan_watchdog_reset();
5640
5641         return count;
5642 }
5643
5644 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5645                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5646
5647 /* --------------------------------------------------------------------- */
5648 static struct attribute *fan_attributes[] = {
5649         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5650         &dev_attr_fan_fan1_input.attr,
5651         NULL
5652 };
5653
5654 static const struct attribute_group fan_attr_group = {
5655         .attrs = fan_attributes,
5656 };
5657
5658 static int __init fan_init(struct ibm_init_struct *iibm)
5659 {
5660         int rc;
5661
5662         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5663
5664         mutex_init(&fan_mutex);
5665         fan_status_access_mode = TPACPI_FAN_NONE;
5666         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5667         fan_control_commands = 0;
5668         fan_watchdog_maxinterval = 0;
5669         tp_features.fan_ctrl_status_undef = 0;
5670         fan_control_desired_level = 7;
5671
5672         TPACPI_ACPIHANDLE_INIT(fans);
5673         TPACPI_ACPIHANDLE_INIT(gfan);
5674         TPACPI_ACPIHANDLE_INIT(sfan);
5675
5676         if (gfan_handle) {
5677                 /* 570, 600e/x, 770e, 770x */
5678                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5679         } else {
5680                 /* all other ThinkPads: note that even old-style
5681                  * ThinkPad ECs supports the fan control register */
5682                 if (likely(acpi_ec_read(fan_status_offset,
5683                                         &fan_control_initial_status))) {
5684                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5685
5686                         /* In some ThinkPads, neither the EC nor the ACPI
5687                          * DSDT initialize the fan status, and it ends up
5688                          * being set to 0x07 when it *could* be either
5689                          * 0x07 or 0x80.
5690                          *
5691                          * Enable for TP-1Y (T43), TP-78 (R51e),
5692                          * TP-76 (R52), TP-70 (T43, R52), which are known
5693                          * to be buggy. */
5694                         if (fan_control_initial_status == 0x07) {
5695                                 switch (thinkpad_id.ec_model) {
5696                                 case 0x5931: /* TP-1Y */
5697                                 case 0x3837: /* TP-78 */
5698                                 case 0x3637: /* TP-76 */
5699                                 case 0x3037: /* TP-70 */
5700                                         printk(TPACPI_NOTICE
5701                                                "fan_init: initial fan status "
5702                                                "is unknown, assuming it is "
5703                                                "in auto mode\n");
5704                                         tp_features.fan_ctrl_status_undef = 1;
5705                                         ;;
5706                                 }
5707                         }
5708                 } else {
5709                         printk(TPACPI_ERR
5710                                "ThinkPad ACPI EC access misbehaving, "
5711                                "fan status and control unavailable\n");
5712                         return 1;
5713                 }
5714         }
5715
5716         if (sfan_handle) {
5717                 /* 570, 770x-JL */
5718                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5719                 fan_control_commands |=
5720                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5721         } else {
5722                 if (!gfan_handle) {
5723                         /* gfan without sfan means no fan control */
5724                         /* all other models implement TP EC 0x2f control */
5725
5726                         if (fans_handle) {
5727                                 /* X31, X40, X41 */
5728                                 fan_control_access_mode =
5729                                     TPACPI_FAN_WR_ACPI_FANS;
5730                                 fan_control_commands |=
5731                                     TPACPI_FAN_CMD_SPEED |
5732                                     TPACPI_FAN_CMD_LEVEL |
5733                                     TPACPI_FAN_CMD_ENABLE;
5734                         } else {
5735                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5736                                 fan_control_commands |=
5737                                     TPACPI_FAN_CMD_LEVEL |
5738                                     TPACPI_FAN_CMD_ENABLE;
5739                         }
5740                 }
5741         }
5742
5743         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5744                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5745                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5746                 fan_status_access_mode, fan_control_access_mode);
5747
5748         /* fan control master switch */
5749         if (!fan_control_allowed) {
5750                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5751                 fan_control_commands = 0;
5752                 dbg_printk(TPACPI_DBG_INIT,
5753                            "fan control features disabled by parameter\n");
5754         }
5755
5756         /* update fan_control_desired_level */
5757         if (fan_status_access_mode != TPACPI_FAN_NONE)
5758                 fan_get_status_safe(NULL);
5759
5760         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5761             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5762                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5763                                          &fan_attr_group);
5764                 if (!(rc < 0))
5765                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5766                                         &driver_attr_fan_watchdog);
5767                 if (rc < 0)
5768                         return rc;
5769                 return 0;
5770         } else
5771                 return 1;
5772 }
5773
5774 static void fan_exit(void)
5775 {
5776         vdbg_printk(TPACPI_DBG_EXIT,
5777                     "cancelling any pending fan watchdog tasks\n");
5778
5779         /* FIXME: can we really do this unconditionally? */
5780         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5781         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5782                            &driver_attr_fan_watchdog);
5783
5784         cancel_delayed_work(&fan_watchdog_task);
5785         flush_scheduled_work();
5786 }
5787
5788 static int fan_read(char *p)
5789 {
5790         int len = 0;
5791         int rc;
5792         u8 status;
5793         unsigned int speed = 0;
5794
5795         switch (fan_status_access_mode) {
5796         case TPACPI_FAN_RD_ACPI_GFAN:
5797                 /* 570, 600e/x, 770e, 770x */
5798                 rc = fan_get_status_safe(&status);
5799                 if (rc < 0)
5800                         return rc;
5801
5802                 len += sprintf(p + len, "status:\t\t%s\n"
5803                                "level:\t\t%d\n",
5804                                (status != 0) ? "enabled" : "disabled", status);
5805                 break;
5806
5807         case TPACPI_FAN_RD_TPEC:
5808                 /* all except 570, 600e/x, 770e, 770x */
5809                 rc = fan_get_status_safe(&status);
5810                 if (rc < 0)
5811                         return rc;
5812
5813                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5814                         if (status != fan_control_initial_status)
5815                                 tp_features.fan_ctrl_status_undef = 0;
5816                         else
5817                                 /* Return most likely status. In fact, it
5818                                  * might be the only possible status */
5819                                 status = TP_EC_FAN_AUTO;
5820                 }
5821
5822                 len += sprintf(p + len, "status:\t\t%s\n",
5823                                (status != 0) ? "enabled" : "disabled");
5824
5825                 rc = fan_get_speed(&speed);
5826                 if (rc < 0)
5827                         return rc;
5828
5829                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5830
5831                 if (status & TP_EC_FAN_FULLSPEED)
5832                         /* Disengaged mode takes precedence */
5833                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5834                 else if (status & TP_EC_FAN_AUTO)
5835                         len += sprintf(p + len, "level:\t\tauto\n");
5836                 else
5837                         len += sprintf(p + len, "level:\t\t%d\n", status);
5838                 break;
5839
5840         case TPACPI_FAN_NONE:
5841         default:
5842                 len += sprintf(p + len, "status:\t\tnot supported\n");
5843         }
5844
5845         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5846                 len += sprintf(p + len, "commands:\tlevel <level>");
5847
5848                 switch (fan_control_access_mode) {
5849                 case TPACPI_FAN_WR_ACPI_SFAN:
5850                         len += sprintf(p + len, " (<level> is 0-7)\n");
5851                         break;
5852
5853                 default:
5854                         len += sprintf(p + len, " (<level> is 0-7, "
5855                                        "auto, disengaged, full-speed)\n");
5856                         break;
5857                 }
5858         }
5859
5860         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5861                 len += sprintf(p + len, "commands:\tenable, disable\n"
5862                                "commands:\twatchdog <timeout> (<timeout> "
5863                                "is 0 (off), 1-120 (seconds))\n");
5864
5865         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5866                 len += sprintf(p + len, "commands:\tspeed <speed>"
5867                                " (<speed> is 0-65535)\n");
5868
5869         return len;
5870 }
5871
5872 static int fan_write_cmd_level(const char *cmd, int *rc)
5873 {
5874         int level;
5875
5876         if (strlencmp(cmd, "level auto") == 0)
5877                 level = TP_EC_FAN_AUTO;
5878         else if ((strlencmp(cmd, "level disengaged") == 0) |
5879                         (strlencmp(cmd, "level full-speed") == 0))
5880                 level = TP_EC_FAN_FULLSPEED;
5881         else if (sscanf(cmd, "level %d", &level) != 1)
5882                 return 0;
5883
5884         *rc = fan_set_level_safe(level);
5885         if (*rc == -ENXIO)
5886                 printk(TPACPI_ERR "level command accepted for unsupported "
5887                        "access mode %d", fan_control_access_mode);
5888
5889         return 1;
5890 }
5891
5892 static int fan_write_cmd_enable(const char *cmd, int *rc)
5893 {
5894         if (strlencmp(cmd, "enable") != 0)
5895                 return 0;
5896
5897         *rc = fan_set_enable();
5898         if (*rc == -ENXIO)
5899                 printk(TPACPI_ERR "enable command accepted for unsupported "
5900                        "access mode %d", fan_control_access_mode);
5901
5902         return 1;
5903 }
5904
5905 static int fan_write_cmd_disable(const char *cmd, int *rc)
5906 {
5907         if (strlencmp(cmd, "disable") != 0)
5908                 return 0;
5909
5910         *rc = fan_set_disable();
5911         if (*rc == -ENXIO)
5912                 printk(TPACPI_ERR "disable command accepted for unsupported "
5913                        "access mode %d", fan_control_access_mode);
5914
5915         return 1;
5916 }
5917
5918 static int fan_write_cmd_speed(const char *cmd, int *rc)
5919 {
5920         int speed;
5921
5922         /* TODO:
5923          * Support speed <low> <medium> <high> ? */
5924
5925         if (sscanf(cmd, "speed %d", &speed) != 1)
5926                 return 0;
5927
5928         *rc = fan_set_speed(speed);
5929         if (*rc == -ENXIO)
5930                 printk(TPACPI_ERR "speed command accepted for unsupported "
5931                        "access mode %d", fan_control_access_mode);
5932
5933         return 1;
5934 }
5935
5936 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5937 {
5938         int interval;
5939
5940         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5941                 return 0;
5942
5943         if (interval < 0 || interval > 120)
5944                 *rc = -EINVAL;
5945         else
5946                 fan_watchdog_maxinterval = interval;
5947
5948         return 1;
5949 }
5950
5951 static int fan_write(char *buf)
5952 {
5953         char *cmd;
5954         int rc = 0;
5955
5956         while (!rc && (cmd = next_cmd(&buf))) {
5957                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5958                       fan_write_cmd_level(cmd, &rc)) &&
5959                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5960                       (fan_write_cmd_enable(cmd, &rc) ||
5961                        fan_write_cmd_disable(cmd, &rc) ||
5962                        fan_write_cmd_watchdog(cmd, &rc))) &&
5963                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5964                       fan_write_cmd_speed(cmd, &rc))
5965                     )
5966                         rc = -EINVAL;
5967                 else if (!rc)
5968                         fan_watchdog_reset();
5969         }
5970
5971         return rc;
5972 }
5973
5974 static struct ibm_struct fan_driver_data = {
5975         .name = "fan",
5976         .read = fan_read,
5977         .write = fan_write,
5978         .exit = fan_exit,
5979 };
5980
5981 /****************************************************************************
5982  ****************************************************************************
5983  *
5984  * Infrastructure
5985  *
5986  ****************************************************************************
5987  ****************************************************************************/
5988
5989 /* sysfs name ---------------------------------------------------------- */
5990 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5991                            struct device_attribute *attr,
5992                            char *buf)
5993 {
5994         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5995 }
5996
5997 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5998         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5999
6000 /* --------------------------------------------------------------------- */
6001
6002 /* /proc support */
6003 static struct proc_dir_entry *proc_dir;
6004
6005 /*
6006  * Module and infrastructure proble, init and exit handling
6007  */
6008
6009 static int force_load;
6010
6011 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
6012 static const char * __init str_supported(int is_supported)
6013 {
6014         static char text_unsupported[] __initdata = "not supported";
6015
6016         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
6017 }
6018 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
6019
6020 static void ibm_exit(struct ibm_struct *ibm)
6021 {
6022         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
6023
6024         list_del_init(&ibm->all_drivers);
6025
6026         if (ibm->flags.acpi_notify_installed) {
6027                 dbg_printk(TPACPI_DBG_EXIT,
6028                         "%s: acpi_remove_notify_handler\n", ibm->name);
6029                 BUG_ON(!ibm->acpi);
6030                 acpi_remove_notify_handler(*ibm->acpi->handle,
6031                                            ibm->acpi->type,
6032                                            dispatch_acpi_notify);
6033                 ibm->flags.acpi_notify_installed = 0;
6034                 ibm->flags.acpi_notify_installed = 0;
6035         }
6036
6037         if (ibm->flags.proc_created) {
6038                 dbg_printk(TPACPI_DBG_EXIT,
6039                         "%s: remove_proc_entry\n", ibm->name);
6040                 remove_proc_entry(ibm->name, proc_dir);
6041                 ibm->flags.proc_created = 0;
6042         }
6043
6044         if (ibm->flags.acpi_driver_registered) {
6045                 dbg_printk(TPACPI_DBG_EXIT,
6046                         "%s: acpi_bus_unregister_driver\n", ibm->name);
6047                 BUG_ON(!ibm->acpi);
6048                 acpi_bus_unregister_driver(ibm->acpi->driver);
6049                 kfree(ibm->acpi->driver);
6050                 ibm->acpi->driver = NULL;
6051                 ibm->flags.acpi_driver_registered = 0;
6052         }
6053
6054         if (ibm->flags.init_called && ibm->exit) {
6055                 ibm->exit();
6056                 ibm->flags.init_called = 0;
6057         }
6058
6059         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
6060 }
6061
6062 static int __init ibm_init(struct ibm_init_struct *iibm)
6063 {
6064         int ret;
6065         struct ibm_struct *ibm = iibm->data;
6066         struct proc_dir_entry *entry;
6067
6068         BUG_ON(ibm == NULL);
6069
6070         INIT_LIST_HEAD(&ibm->all_drivers);
6071
6072         if (ibm->flags.experimental && !experimental)
6073                 return 0;
6074
6075         dbg_printk(TPACPI_DBG_INIT,
6076                 "probing for %s\n", ibm->name);
6077
6078         if (iibm->init) {
6079                 ret = iibm->init(iibm);
6080                 if (ret > 0)
6081                         return 0;       /* probe failed */
6082                 if (ret)
6083                         return ret;
6084
6085                 ibm->flags.init_called = 1;
6086         }
6087
6088         if (ibm->acpi) {
6089                 if (ibm->acpi->hid) {
6090                         ret = register_tpacpi_subdriver(ibm);
6091                         if (ret)
6092                                 goto err_out;
6093                 }
6094
6095                 if (ibm->acpi->notify) {
6096                         ret = setup_acpi_notify(ibm);
6097                         if (ret == -ENODEV) {
6098                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
6099                                         ibm->name);
6100                                 ret = 0;
6101                                 goto err_out;
6102                         }
6103                         if (ret < 0)
6104                                 goto err_out;
6105                 }
6106         }
6107
6108         dbg_printk(TPACPI_DBG_INIT,
6109                 "%s installed\n", ibm->name);
6110
6111         if (ibm->read) {
6112                 entry = create_proc_entry(ibm->name,
6113                                           S_IFREG | S_IRUGO | S_IWUSR,
6114                                           proc_dir);
6115                 if (!entry) {
6116                         printk(TPACPI_ERR "unable to create proc entry %s\n",
6117                                ibm->name);
6118                         ret = -ENODEV;
6119                         goto err_out;
6120                 }
6121                 entry->owner = THIS_MODULE;
6122                 entry->data = ibm;
6123                 entry->read_proc = &dispatch_procfs_read;
6124                 if (ibm->write)
6125                         entry->write_proc = &dispatch_procfs_write;
6126                 ibm->flags.proc_created = 1;
6127         }
6128
6129         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
6130
6131         return 0;
6132
6133 err_out:
6134         dbg_printk(TPACPI_DBG_INIT,
6135                 "%s: at error exit path with result %d\n",
6136                 ibm->name, ret);
6137
6138         ibm_exit(ibm);
6139         return (ret < 0)? ret : 0;
6140 }
6141
6142 /* Probing */
6143
6144 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
6145 {
6146         const struct dmi_device *dev = NULL;
6147         char ec_fw_string[18];
6148
6149         if (!tp)
6150                 return;
6151
6152         memset(tp, 0, sizeof(*tp));
6153
6154         if (dmi_name_in_vendors("IBM"))
6155                 tp->vendor = PCI_VENDOR_ID_IBM;
6156         else if (dmi_name_in_vendors("LENOVO"))
6157                 tp->vendor = PCI_VENDOR_ID_LENOVO;
6158         else
6159                 return;
6160
6161         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
6162                                         GFP_KERNEL);
6163         if (!tp->bios_version_str)
6164                 return;
6165         tp->bios_model = tp->bios_version_str[0]
6166                          | (tp->bios_version_str[1] << 8);
6167
6168         /*
6169          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
6170          * X32 or newer, all Z series;  Some models must have an
6171          * up-to-date BIOS or they will not be detected.
6172          *
6173          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6174          */
6175         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
6176                 if (sscanf(dev->name,
6177                            "IBM ThinkPad Embedded Controller -[%17c",
6178                            ec_fw_string) == 1) {
6179                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
6180                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
6181
6182                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
6183                         tp->ec_model = ec_fw_string[0]
6184                                         | (ec_fw_string[1] << 8);
6185                         break;
6186                 }
6187         }
6188
6189         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
6190                                         GFP_KERNEL);
6191         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
6192                 kfree(tp->model_str);
6193                 tp->model_str = NULL;
6194         }
6195
6196         tp->nummodel_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_NAME),
6197                                         GFP_KERNEL);
6198 }
6199
6200 static int __init probe_for_thinkpad(void)
6201 {
6202         int is_thinkpad;
6203
6204         if (acpi_disabled)
6205                 return -ENODEV;
6206
6207         /*
6208          * Non-ancient models have better DMI tagging, but very old models
6209          * don't.
6210          */
6211         is_thinkpad = (thinkpad_id.model_str != NULL);
6212
6213         /* ec is required because many other handles are relative to it */
6214         TPACPI_ACPIHANDLE_INIT(ec);
6215         if (!ec_handle) {
6216                 if (is_thinkpad)
6217                         printk(TPACPI_ERR
6218                                 "Not yet supported ThinkPad detected!\n");
6219                 return -ENODEV;
6220         }
6221
6222         /*
6223          * Risks a regression on very old machines, but reduces potential
6224          * false positives a damn great deal
6225          */
6226         if (!is_thinkpad)
6227                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
6228
6229         if (!is_thinkpad && !force_load)
6230                 return -ENODEV;
6231
6232         return 0;
6233 }
6234
6235
6236 /* Module init, exit, parameters */
6237
6238 static struct ibm_init_struct ibms_init[] __initdata = {
6239         {
6240                 .init = thinkpad_acpi_driver_init,
6241                 .data = &thinkpad_acpi_driver_data,
6242         },
6243         {
6244                 .init = hotkey_init,
6245                 .data = &hotkey_driver_data,
6246         },
6247         {
6248                 .init = bluetooth_init,
6249                 .data = &bluetooth_driver_data,
6250         },
6251         {
6252                 .init = wan_init,
6253                 .data = &wan_driver_data,
6254         },
6255 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
6256         {
6257                 .init = video_init,
6258                 .data = &video_driver_data,
6259         },
6260 #endif
6261         {
6262                 .init = light_init,
6263                 .data = &light_driver_data,
6264         },
6265 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6266         {
6267                 .init = dock_init,
6268                 .data = &dock_driver_data[0],
6269         },
6270         {
6271                 .init = dock_init2,
6272                 .data = &dock_driver_data[1],
6273         },
6274 #endif
6275 #ifdef CONFIG_THINKPAD_ACPI_BAY
6276         {
6277                 .init = bay_init,
6278                 .data = &bay_driver_data,
6279         },
6280 #endif
6281         {
6282                 .init = cmos_init,
6283                 .data = &cmos_driver_data,
6284         },
6285         {
6286                 .init = led_init,
6287                 .data = &led_driver_data,
6288         },
6289         {
6290                 .init = beep_init,
6291                 .data = &beep_driver_data,
6292         },
6293         {
6294                 .init = thermal_init,
6295                 .data = &thermal_driver_data,
6296         },
6297         {
6298                 .data = &ecdump_driver_data,
6299         },
6300         {
6301                 .init = brightness_init,
6302                 .data = &brightness_driver_data,
6303         },
6304         {
6305                 .data = &volume_driver_data,
6306         },
6307         {
6308                 .init = fan_init,
6309                 .data = &fan_driver_data,
6310         },
6311 };
6312
6313 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
6314 {
6315         unsigned int i;
6316         struct ibm_struct *ibm;
6317
6318         if (!kp || !kp->name || !val)
6319                 return -EINVAL;
6320
6321         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6322                 ibm = ibms_init[i].data;
6323                 WARN_ON(ibm == NULL);
6324
6325                 if (!ibm || !ibm->name)
6326                         continue;
6327
6328                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
6329                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
6330                                 return -ENOSPC;
6331                         strcpy(ibms_init[i].param, val);
6332                         strcat(ibms_init[i].param, ",");
6333                         return 0;
6334                 }
6335         }
6336
6337         return -EINVAL;
6338 }
6339
6340 module_param(experimental, int, 0);
6341 MODULE_PARM_DESC(experimental,
6342                  "Enables experimental features when non-zero");
6343
6344 module_param_named(debug, dbg_level, uint, 0);
6345 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
6346
6347 module_param(force_load, bool, 0);
6348 MODULE_PARM_DESC(force_load,
6349                  "Attempts to load the driver even on a "
6350                  "mis-identified ThinkPad when true");
6351
6352 module_param_named(fan_control, fan_control_allowed, bool, 0);
6353 MODULE_PARM_DESC(fan_control,
6354                  "Enables setting fan parameters features when true");
6355
6356 module_param_named(brightness_mode, brightness_mode, int, 0);
6357 MODULE_PARM_DESC(brightness_mode,
6358                  "Selects brightness control strategy: "
6359                  "0=auto, 1=EC, 2=CMOS, 3=both");
6360
6361 module_param(brightness_enable, uint, 0);
6362 MODULE_PARM_DESC(brightness_enable,
6363                  "Enables backlight control when 1, disables when 0");
6364
6365 module_param(hotkey_report_mode, uint, 0);
6366 MODULE_PARM_DESC(hotkey_report_mode,
6367                  "used for backwards compatibility with userspace, "
6368                  "see documentation");
6369
6370 #define TPACPI_PARAM(feature) \
6371         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6372         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6373                          "at module load, see documentation")
6374
6375 TPACPI_PARAM(hotkey);
6376 TPACPI_PARAM(bluetooth);
6377 TPACPI_PARAM(video);
6378 TPACPI_PARAM(light);
6379 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6380 TPACPI_PARAM(dock);
6381 #endif
6382 #ifdef CONFIG_THINKPAD_ACPI_BAY
6383 TPACPI_PARAM(bay);
6384 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6385 TPACPI_PARAM(cmos);
6386 TPACPI_PARAM(led);
6387 TPACPI_PARAM(beep);
6388 TPACPI_PARAM(ecdump);
6389 TPACPI_PARAM(brightness);
6390 TPACPI_PARAM(volume);
6391 TPACPI_PARAM(fan);
6392
6393 static void thinkpad_acpi_module_exit(void)
6394 {
6395         struct ibm_struct *ibm, *itmp;
6396
6397         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6398
6399         list_for_each_entry_safe_reverse(ibm, itmp,
6400                                          &tpacpi_all_drivers,
6401                                          all_drivers) {
6402                 ibm_exit(ibm);
6403         }
6404
6405         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6406
6407         if (tpacpi_inputdev) {
6408                 if (tp_features.input_device_registered)
6409                         input_unregister_device(tpacpi_inputdev);
6410                 else
6411                         input_free_device(tpacpi_inputdev);
6412         }
6413
6414         if (tpacpi_hwmon)
6415                 hwmon_device_unregister(tpacpi_hwmon);
6416
6417         if (tp_features.sensors_pdev_attrs_registered)
6418                 device_remove_file(&tpacpi_sensors_pdev->dev,
6419                                    &dev_attr_thinkpad_acpi_pdev_name);
6420         if (tpacpi_sensors_pdev)
6421                 platform_device_unregister(tpacpi_sensors_pdev);
6422         if (tpacpi_pdev)
6423                 platform_device_unregister(tpacpi_pdev);
6424
6425         if (tp_features.sensors_pdrv_attrs_registered)
6426                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6427         if (tp_features.platform_drv_attrs_registered)
6428                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6429
6430         if (tp_features.sensors_pdrv_registered)
6431                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6432
6433         if (tp_features.platform_drv_registered)
6434                 platform_driver_unregister(&tpacpi_pdriver);
6435
6436         if (proc_dir)
6437                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6438
6439         kfree(thinkpad_id.bios_version_str);
6440         kfree(thinkpad_id.ec_version_str);
6441         kfree(thinkpad_id.model_str);
6442 }
6443
6444
6445 static int __init thinkpad_acpi_module_init(void)
6446 {
6447         int ret, i;
6448
6449         tpacpi_lifecycle = TPACPI_LIFE_INIT;
6450
6451         /* Parameter checking */
6452         if (hotkey_report_mode > 2)
6453                 return -EINVAL;
6454
6455         /* Driver-level probe */
6456
6457         get_thinkpad_model_data(&thinkpad_id);
6458         ret = probe_for_thinkpad();
6459         if (ret) {
6460                 thinkpad_acpi_module_exit();
6461                 return ret;
6462         }
6463
6464         /* Driver initialization */
6465
6466         TPACPI_ACPIHANDLE_INIT(ecrd);
6467         TPACPI_ACPIHANDLE_INIT(ecwr);
6468
6469         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6470         if (!proc_dir) {
6471                 printk(TPACPI_ERR
6472                        "unable to create proc dir " TPACPI_PROC_DIR);
6473                 thinkpad_acpi_module_exit();
6474                 return -ENODEV;
6475         }
6476         proc_dir->owner = THIS_MODULE;
6477
6478         ret = platform_driver_register(&tpacpi_pdriver);
6479         if (ret) {
6480                 printk(TPACPI_ERR
6481                        "unable to register main platform driver\n");
6482                 thinkpad_acpi_module_exit();
6483                 return ret;
6484         }
6485         tp_features.platform_drv_registered = 1;
6486
6487         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6488         if (ret) {
6489                 printk(TPACPI_ERR
6490                        "unable to register hwmon platform driver\n");
6491                 thinkpad_acpi_module_exit();
6492                 return ret;
6493         }
6494         tp_features.sensors_pdrv_registered = 1;
6495
6496         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6497         if (!ret) {
6498                 tp_features.platform_drv_attrs_registered = 1;
6499                 ret = tpacpi_create_driver_attributes(
6500                                         &tpacpi_hwmon_pdriver.driver);
6501         }
6502         if (ret) {
6503                 printk(TPACPI_ERR
6504                        "unable to create sysfs driver attributes\n");
6505                 thinkpad_acpi_module_exit();
6506                 return ret;
6507         }
6508         tp_features.sensors_pdrv_attrs_registered = 1;
6509
6510
6511         /* Device initialization */
6512         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6513                                                         NULL, 0);
6514         if (IS_ERR(tpacpi_pdev)) {
6515                 ret = PTR_ERR(tpacpi_pdev);
6516                 tpacpi_pdev = NULL;
6517                 printk(TPACPI_ERR "unable to register platform device\n");
6518                 thinkpad_acpi_module_exit();
6519                 return ret;
6520         }
6521         tpacpi_sensors_pdev = platform_device_register_simple(
6522                                                 TPACPI_HWMON_DRVR_NAME,
6523                                                 -1, NULL, 0);
6524         if (IS_ERR(tpacpi_sensors_pdev)) {
6525                 ret = PTR_ERR(tpacpi_sensors_pdev);
6526                 tpacpi_sensors_pdev = NULL;
6527                 printk(TPACPI_ERR
6528                        "unable to register hwmon platform device\n");
6529                 thinkpad_acpi_module_exit();
6530                 return ret;
6531         }
6532         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6533                                  &dev_attr_thinkpad_acpi_pdev_name);
6534         if (ret) {
6535                 printk(TPACPI_ERR
6536                        "unable to create sysfs hwmon device attributes\n");
6537                 thinkpad_acpi_module_exit();
6538                 return ret;
6539         }
6540         tp_features.sensors_pdev_attrs_registered = 1;
6541         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6542         if (IS_ERR(tpacpi_hwmon)) {
6543                 ret = PTR_ERR(tpacpi_hwmon);
6544                 tpacpi_hwmon = NULL;
6545                 printk(TPACPI_ERR "unable to register hwmon device\n");
6546                 thinkpad_acpi_module_exit();
6547                 return ret;
6548         }
6549         mutex_init(&tpacpi_inputdev_send_mutex);
6550         tpacpi_inputdev = input_allocate_device();
6551         if (!tpacpi_inputdev) {
6552                 printk(TPACPI_ERR "unable to allocate input device\n");
6553                 thinkpad_acpi_module_exit();
6554                 return -ENOMEM;
6555         } else {
6556                 /* Prepare input device, but don't register */
6557                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6558                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6559                 tpacpi_inputdev->id.bustype = BUS_HOST;
6560                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6561                                                 thinkpad_id.vendor :
6562                                                 PCI_VENDOR_ID_IBM;
6563                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6564                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6565         }
6566         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6567                 ret = ibm_init(&ibms_init[i]);
6568                 if (ret >= 0 && *ibms_init[i].param)
6569                         ret = ibms_init[i].data->write(ibms_init[i].param);
6570                 if (ret < 0) {
6571                         thinkpad_acpi_module_exit();
6572                         return ret;
6573                 }
6574         }
6575         ret = input_register_device(tpacpi_inputdev);
6576         if (ret < 0) {
6577                 printk(TPACPI_ERR "unable to register input device\n");
6578                 thinkpad_acpi_module_exit();
6579                 return ret;
6580         } else {
6581                 tp_features.input_device_registered = 1;
6582         }
6583
6584         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6585         return 0;
6586 }
6587
6588 /* Please remove this in year 2009 */
6589 MODULE_ALIAS("ibm_acpi");
6590
6591 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME);
6592
6593 /*
6594  * DMI matching for module autoloading
6595  *
6596  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6597  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6598  *
6599  * Only models listed in thinkwiki will be supported, so add yours
6600  * if it is not there yet.
6601  */
6602 #define IBM_BIOS_MODULE_ALIAS(__type) \
6603         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6604
6605 /* Non-ancient thinkpads */
6606 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6607 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6608
6609 /* Ancient thinkpad BIOSes have to be identified by
6610  * BIOS type or model number, and there are far less
6611  * BIOS types than model numbers... */
6612 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6613 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6614 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6615
6616 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6617 MODULE_DESCRIPTION(TPACPI_DESC);
6618 MODULE_VERSION(TPACPI_VERSION);
6619 MODULE_LICENSE("GPL");
6620
6621 module_init(thinkpad_acpi_module_init);
6622 module_exit(thinkpad_acpi_module_exit);