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) 2006-2007 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 "0.18"
  25 #define TPACPI_SYSFS_VERSION 0x020101
  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 <asm/uaccess.h>
  71
  72 #include <linux/dmi.h>
  73 #include <linux/jiffies.h>
  74 #include <linux/workqueue.h>
  75
  76 #include <acpi/acpi_drivers.h>
  77 #include <acpi/acnamesp.h>
  78
  79 #include <linux/pci_ids.h>
  80
  81
  82 /* ThinkPad CMOS commands */
  83 #define TP_CMOS_VOLUME_DOWN     0
  84 #define TP_CMOS_VOLUME_UP       1
  85 #define TP_CMOS_VOLUME_MUTE     2
  86 #define TP_CMOS_BRIGHTNESS_UP   4
  87 #define TP_CMOS_BRIGHTNESS_DOWN 5
  88
  89 /* NVRAM Addresses */
  90 enum tp_nvram_addr {
  91         TP_NVRAM_ADDR_HK2               = 0x57,
  92         TP_NVRAM_ADDR_THINKLIGHT        = 0x58,
  93         TP_NVRAM_ADDR_VIDEO             = 0x59,
  94         TP_NVRAM_ADDR_BRIGHTNESS        = 0x5e,
  95         TP_NVRAM_ADDR_MIXER             = 0x60,
  96 };
  97
  98 /* NVRAM bit masks */
  99 enum {
 100         TP_NVRAM_MASK_HKT_THINKPAD      = 0x08,
 101         TP_NVRAM_MASK_HKT_ZOOM          = 0x20,
 102         TP_NVRAM_MASK_HKT_DISPLAY       = 0x40,
 103         TP_NVRAM_MASK_HKT_HIBERNATE     = 0x80,
 104         TP_NVRAM_MASK_THINKLIGHT        = 0x10,
 105         TP_NVRAM_MASK_HKT_DISPEXPND     = 0x30,
 106         TP_NVRAM_MASK_HKT_BRIGHTNESS    = 0x20,
 107         TP_NVRAM_MASK_LEVEL_BRIGHTNESS  = 0x0f,
 108         TP_NVRAM_POS_LEVEL_BRIGHTNESS   = 0,
 109         TP_NVRAM_MASK_MUTE              = 0x40,
 110         TP_NVRAM_MASK_HKT_VOLUME        = 0x80,
 111         TP_NVRAM_MASK_LEVEL_VOLUME      = 0x0f,
 112         TP_NVRAM_POS_LEVEL_VOLUME       = 0,
 113 };
 114
 115 /* ACPI HIDs */
 116 #define TPACPI_ACPI_HKEY_HID            "IBM0068"
 117
 118 /* Input IDs */
 119 #define TPACPI_HKEY_INPUT_PRODUCT       0x5054 /* "TP" */
 120 #define TPACPI_HKEY_INPUT_VERSION       0x4101
 121
 122
 123 /****************************************************************************
 124  * Main driver
 125  */
 126
 127 #define TPACPI_NAME "thinkpad"
 128 #define TPACPI_DESC "ThinkPad ACPI Extras"
 129 #define TPACPI_FILE TPACPI_NAME "_acpi"
 130 #define TPACPI_URL "http://ibm-acpi.sf.net/"
 131 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net"
 132
 133 #define TPACPI_PROC_DIR "ibm"
 134 #define TPACPI_ACPI_EVENT_PREFIX "ibm"
 135 #define TPACPI_DRVR_NAME TPACPI_FILE
 136 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon"
 137
 138 #define TPACPI_MAX_ACPI_ARGS 3
 139
 140 /* Debugging */
 141 #define TPACPI_LOG TPACPI_FILE ": "
 142 #define TPACPI_ERR         KERN_ERR    TPACPI_LOG
 143 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG
 144 #define TPACPI_INFO   KERN_INFO   TPACPI_LOG
 145 #define TPACPI_DEBUG  KERN_DEBUG  TPACPI_LOG
 146
 147 #define TPACPI_DBG_ALL          0xffff
 148 #define TPACPI_DBG_ALL          0xffff
 149 #define TPACPI_DBG_INIT         0x0001
 150 #define TPACPI_DBG_EXIT         0x0002
 151 #define dbg_printk(a_dbg_level, format, arg...) \
 152         do { if (dbg_level & a_dbg_level) \
 153                 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \
 154         } while (0)
 155 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
 156 #define vdbg_printk(a_dbg_level, format, arg...) \
 157         dbg_printk(a_dbg_level, format, ## arg)
 158 static const char *str_supported(int is_supported);
 159 #else
 160 #define vdbg_printk(a_dbg_level, format, arg...)
 161 #endif
 162
 163 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off")
 164 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled")
 165 #define strlencmp(a, b) (strncmp((a), (b), strlen(b)))
 166
 167
 168 /****************************************************************************
 169  * Driver-wide structs and misc. variables
 170  */
 171
 172 struct ibm_struct;
 173
 174 struct tp_acpi_drv_struct {
 175         const struct acpi_device_id *hid;
 176         struct acpi_driver *driver;
 177
 178         void (*notify) (struct ibm_struct *, u32);
 179         acpi_handle *handle;
 180         u32 type;
 181         struct acpi_device *device;
 182 };
 183
 184 struct ibm_struct {
 185         char *name;
 186
 187         int (*read) (char *);
 188         int (*write) (char *);
 189         void (*exit) (void);
 190         void (*resume) (void);
 191         void (*suspend) (pm_message_t state);
 192
 193         struct list_head all_drivers;
 194
 195         struct tp_acpi_drv_struct *acpi;
 196
 197         struct {
 198                 u8 acpi_driver_registered:1;
 199                 u8 acpi_notify_installed:1;
 200                 u8 proc_created:1;
 201                 u8 init_called:1;
 202                 u8 experimental:1;
 203         } flags;
 204 };
 205
 206 struct ibm_init_struct {
 207         char param[32];
 208
 209         int (*init) (struct ibm_init_struct *);
 210         struct ibm_struct *data;
 211 };
 212
 213 static struct {
 214 #ifdef CONFIG_THINKPAD_ACPI_BAY
 215         u32 bay_status:1;
 216         u32 bay_eject:1;
 217         u32 bay_status2:1;
 218         u32 bay_eject2:1;
 219 #endif
 220         u32 bluetooth:1;
 221         u32 hotkey:1;
 222         u32 hotkey_mask:1;
 223         u32 hotkey_wlsw:1;
 224         u32 light:1;
 225         u32 light_status:1;
 226         u32 bright_16levels:1;
 227         u32 wan:1;
 228         u32 fan_ctrl_status_undef:1;
 229         u32 input_device_registered:1;
 230         u32 platform_drv_registered:1;
 231         u32 platform_drv_attrs_registered:1;
 232         u32 sensors_pdrv_registered:1;
 233         u32 sensors_pdrv_attrs_registered:1;
 234         u32 sensors_pdev_attrs_registered:1;
 235         u32 hotkey_poll_active:1;
 236 } tp_features;
 237
 238 struct thinkpad_id_data {
 239         unsigned int vendor;    /* ThinkPad vendor:
 240                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 241
 242         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 243         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 244
 245         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 246         u16 ec_model;
 247
 248         char *model_str;
 249 };
 250 static struct thinkpad_id_data thinkpad_id;
 251
 252 static enum {
 253         TPACPI_LIFE_INIT = 0,
 254         TPACPI_LIFE_RUNNING,
 255         TPACPI_LIFE_EXITING,
 256 } tpacpi_lifecycle;
 257
 258 static int experimental;
 259 static u32 dbg_level;
 260
 261 /****************************************************************************
 262  ****************************************************************************
 263  *
 264  * ACPI Helpers and device model
 265  *
 266  ****************************************************************************
 267  ****************************************************************************/
 268
 269 /*************************************************************************
 270  * ACPI basic handles
 271  */
 272
 273 static acpi_handle root_handle;
 274
 275 #define TPACPI_HANDLE(object, parent, paths...)                 \
 276         static acpi_handle  object##_handle;                    \
 277         static acpi_handle *object##_parent = &parent##_handle; \
 278         static char        *object##_path;                      \
 279         static char        *object##_paths[] = { paths }
 280
 281 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 282            "\\_SB.PCI.ISA.EC",  /* 570 */
 283            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 284            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 285            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 286            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 287            "\\_SB.PCI0.LPC.EC", /* all others */
 288            );
 289
 290 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 291 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 292
 293 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 294                                         /* T4x, X31, X40 */
 295            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 296            "\\CMS",             /* R40, R40e */
 297            );                   /* all others */
 298
 299 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 300            "^HKEY",             /* R30, R31 */
 301            "HKEY",              /* all others */
 302            );                   /* 570 */
 303
 304
 305 /*************************************************************************
 306  * ACPI helpers
 307  */
 308
 309 static int acpi_evalf(acpi_handle handle,
 310                       void *res, char *method, char *fmt, ...)
 311 {
 312         char *fmt0 = fmt;
 313         struct acpi_object_list params;
 314         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 315         struct acpi_buffer result, *resultp;
 316         union acpi_object out_obj;
 317         acpi_status status;
 318         va_list ap;
 319         char res_type;
 320         int success;
 321         int quiet;
 322
 323         if (!*fmt) {
 324                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 325                 return 0;
 326         }
 327
 328         if (*fmt == 'q') {
 329                 quiet = 1;
 330                 fmt++;
 331         } else
 332                 quiet = 0;
 333
 334         res_type = *(fmt++);
 335
 336         params.count = 0;
 337         params.pointer = &in_objs[0];
 338
 339         va_start(ap, fmt);
 340         while (*fmt) {
 341                 char c = *(fmt++);
 342                 switch (c) {
 343                 case 'd':       /* int */
 344                         in_objs[params.count].integer.value = va_arg(ap, int);
 345                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 346                         break;
 347                         /* add more types as needed */
 348                 default:
 349                         printk(TPACPI_ERR "acpi_evalf() called "
 350                                "with invalid format character '%c'\n", c);
 351                         return 0;
 352                 }
 353         }
 354         va_end(ap);
 355
 356         if (res_type != 'v') {
 357                 result.length = sizeof(out_obj);
 358                 result.pointer = &out_obj;
 359                 resultp = &result;
 360         } else
 361                 resultp = NULL;
 362
 363         status = acpi_evaluate_object(handle, method, &params, resultp);
 364
 365         switch (res_type) {
 366         case 'd':               /* int */
 367                 if (res)
 368                         *(int *)res = out_obj.integer.value;
 369                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 370                 break;
 371         case 'v':               /* void */
 372                 success = status == AE_OK;
 373                 break;
 374                 /* add more types as needed */
 375         default:
 376                 printk(TPACPI_ERR "acpi_evalf() called "
 377                        "with invalid format character '%c'\n", res_type);
 378                 return 0;
 379         }
 380
 381         if (!success && !quiet)
 382                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 383                        method, fmt0, status);
 384
 385         return success;
 386 }
 387
 388 static int acpi_ec_read(int i, u8 *p)
 389 {
 390         int v;
 391
 392         if (ecrd_handle) {
 393                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 394                         return 0;
 395                 *p = v;
 396         } else {
 397                 if (ec_read(i, p) < 0)
 398                         return 0;
 399         }
 400
 401         return 1;
 402 }
 403
 404 static int acpi_ec_write(int i, u8 v)
 405 {
 406         if (ecwr_handle) {
 407                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 408                         return 0;
 409         } else {
 410                 if (ec_write(i, v) < 0)
 411                         return 0;
 412         }
 413
 414         return 1;
 415 }
 416
 417 static int _sta(acpi_handle handle)
 418 {
 419         int status;
 420
 421         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 422                 status = 0;
 423
 424         return status;
 425 }
 426
 427 static int issue_thinkpad_cmos_command(int cmos_cmd)
 428 {
 429         if (!cmos_handle)
 430                 return -ENXIO;
 431
 432         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 433                 return -EIO;
 434
 435         return 0;
 436 }
 437
 438 /*************************************************************************
 439  * ACPI device model
 440  */
 441
 442 #define TPACPI_ACPIHANDLE_INIT(object) \
 443         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 444                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 445
 446 static void drv_acpi_handle_init(char *name,
 447                            acpi_handle *handle, acpi_handle parent,
 448                            char **paths, int num_paths, char **path)
 449 {
 450         int i;
 451         acpi_status status;
 452
 453         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 454                 name);
 455
 456         for (i = 0; i < num_paths; i++) {
 457                 status = acpi_get_handle(parent, paths[i], handle);
 458                 if (ACPI_SUCCESS(status)) {
 459                         *path = paths[i];
 460                         dbg_printk(TPACPI_DBG_INIT,
 461                                    "Found ACPI handle %s for %s\n",
 462                                    *path, name);
 463                         return;
 464                 }
 465         }
 466
 467         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 468                     name);
 469         *handle = NULL;
 470 }
 471
 472 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 473 {
 474         struct ibm_struct *ibm = data;
 475
 476         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 477                 return;
 478
 479         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 480                 return;
 481
 482         ibm->acpi->notify(ibm, event);
 483 }
 484
 485 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 486 {
 487         acpi_status status;
 488         int rc;
 489
 490         BUG_ON(!ibm->acpi);
 491
 492         if (!*ibm->acpi->handle)
 493                 return 0;
 494
 495         vdbg_printk(TPACPI_DBG_INIT,
 496                 "setting up ACPI notify for %s\n", ibm->name);
 497
 498         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 499         if (rc < 0) {
 500                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 501                         ibm->name, rc);
 502                 return -ENODEV;
 503         }
 504
 505         acpi_driver_data(ibm->acpi->device) = ibm;
 506         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 507                 TPACPI_ACPI_EVENT_PREFIX,
 508                 ibm->name);
 509
 510         status = acpi_install_notify_handler(*ibm->acpi->handle,
 511                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 512         if (ACPI_FAILURE(status)) {
 513                 if (status == AE_ALREADY_EXISTS) {
 514                         printk(TPACPI_NOTICE
 515                                "another device driver is already "
 516                                "handling %s events\n", ibm->name);
 517                 } else {
 518                         printk(TPACPI_ERR
 519                                "acpi_install_notify_handler(%s) failed: %d\n",
 520                                ibm->name, status);
 521                 }
 522                 return -ENODEV;
 523         }
 524         ibm->flags.acpi_notify_installed = 1;
 525         return 0;
 526 }
 527
 528 static int __init tpacpi_device_add(struct acpi_device *device)
 529 {
 530         return 0;
 531 }
 532
 533 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 534 {
 535         int rc;
 536
 537         dbg_printk(TPACPI_DBG_INIT,
 538                 "registering %s as an ACPI driver\n", ibm->name);
 539
 540         BUG_ON(!ibm->acpi);
 541
 542         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 543         if (!ibm->acpi->driver) {
 544                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
 545                 return -ENOMEM;
 546         }
 547
 548         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 549         ibm->acpi->driver->ids = ibm->acpi->hid;
 550
 551         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 552
 553         rc = acpi_bus_register_driver(ibm->acpi->driver);
 554         if (rc < 0) {
 555                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 556                        ibm->name, rc);
 557                 kfree(ibm->acpi->driver);
 558                 ibm->acpi->driver = NULL;
 559         } else if (!rc)
 560                 ibm->flags.acpi_driver_registered = 1;
 561
 562         return rc;
 563 }
 564
 565
 566 /****************************************************************************
 567  ****************************************************************************
 568  *
 569  * Procfs Helpers
 570  *
 571  ****************************************************************************
 572  ****************************************************************************/
 573
 574 static int dispatch_procfs_read(char *page, char **start, off_t off,
 575                         int count, int *eof, void *data)
 576 {
 577         struct ibm_struct *ibm = data;
 578         int len;
 579
 580         if (!ibm || !ibm->read)
 581                 return -EINVAL;
 582
 583         len = ibm->read(page);
 584         if (len < 0)
 585                 return len;
 586
 587         if (len <= off + count)
 588                 *eof = 1;
 589         *start = page + off;
 590         len -= off;
 591         if (len > count)
 592                 len = count;
 593         if (len < 0)
 594                 len = 0;
 595
 596         return len;
 597 }
 598
 599 static int dispatch_procfs_write(struct file *file,
 600                         const char __user *userbuf,
 601                         unsigned long count, void *data)
 602 {
 603         struct ibm_struct *ibm = data;
 604         char *kernbuf;
 605         int ret;
 606
 607         if (!ibm || !ibm->write)
 608                 return -EINVAL;
 609
 610         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 611         if (!kernbuf)
 612                 return -ENOMEM;
 613
 614         if (copy_from_user(kernbuf, userbuf, count)) {
 615                 kfree(kernbuf);
 616                 return -EFAULT;
 617         }
 618
 619         kernbuf[count] = 0;
 620         strcat(kernbuf, ",");
 621         ret = ibm->write(kernbuf);
 622         if (ret == 0)
 623                 ret = count;
 624
 625         kfree(kernbuf);
 626
 627         return ret;
 628 }
 629
 630 static char *next_cmd(char **cmds)
 631 {
 632         char *start = *cmds;
 633         char *end;
 634
 635         while ((end = strchr(start, ',')) && end == start)
 636                 start = end + 1;
 637
 638         if (!end)
 639                 return NULL;
 640
 641         *end = 0;
 642         *cmds = end + 1;
 643         return start;
 644 }
 645
 646
 647 /****************************************************************************
 648  ****************************************************************************
 649  *
 650  * Device model: input, hwmon and platform
 651  *
 652  ****************************************************************************
 653  ****************************************************************************/
 654
 655 static struct platform_device *tpacpi_pdev;
 656 static struct platform_device *tpacpi_sensors_pdev;
 657 static struct device *tpacpi_hwmon;
 658 static struct input_dev *tpacpi_inputdev;
 659 static struct mutex tpacpi_inputdev_send_mutex;
 660 static LIST_HEAD(tpacpi_all_drivers);
 661
 662 static int tpacpi_suspend_handler(struct platform_device *pdev,
 663                                   pm_message_t state)
 664 {
 665         struct ibm_struct *ibm, *itmp;
 666
 667         list_for_each_entry_safe(ibm, itmp,
 668                                  &tpacpi_all_drivers,
 669                                  all_drivers) {
 670                 if (ibm->suspend)
 671                         (ibm->suspend)(state);
 672         }
 673
 674         return 0;
 675 }
 676
 677 static int tpacpi_resume_handler(struct platform_device *pdev)
 678 {
 679         struct ibm_struct *ibm, *itmp;
 680
 681         list_for_each_entry_safe(ibm, itmp,
 682                                  &tpacpi_all_drivers,
 683                                  all_drivers) {
 684                 if (ibm->resume)
 685                         (ibm->resume)();
 686         }
 687
 688         return 0;
 689 }
 690
 691 static struct platform_driver tpacpi_pdriver = {
 692         .driver = {
 693                 .name = TPACPI_DRVR_NAME,
 694                 .owner = THIS_MODULE,
 695         },
 696         .suspend = tpacpi_suspend_handler,
 697         .resume = tpacpi_resume_handler,
 698 };
 699
 700 static struct platform_driver tpacpi_hwmon_pdriver = {
 701         .driver = {
 702                 .name = TPACPI_HWMON_DRVR_NAME,
 703                 .owner = THIS_MODULE,
 704         },
 705 };
 706
 707 /*************************************************************************
 708  * sysfs support helpers
 709  */
 710
 711 struct attribute_set {
 712         unsigned int members, max_members;
 713         struct attribute_group group;
 714 };
 715
 716 struct attribute_set_obj {
 717         struct attribute_set s;
 718         struct attribute *a;
 719 } __attribute__((packed));
 720
 721 static struct attribute_set *create_attr_set(unsigned int max_members,
 722                                                 const char *name)
 723 {
 724         struct attribute_set_obj *sobj;
 725
 726         if (max_members == 0)
 727                 return NULL;
 728
 729         /* Allocates space for implicit NULL at the end too */
 730         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 731                     max_members * sizeof(struct attribute *),
 732                     GFP_KERNEL);
 733         if (!sobj)
 734                 return NULL;
 735         sobj->s.max_members = max_members;
 736         sobj->s.group.attrs = &sobj->a;
 737         sobj->s.group.name = name;
 738
 739         return &sobj->s;
 740 }
 741
 742 #define destroy_attr_set(_set) \
 743         kfree(_set);
 744
 745 /* not multi-threaded safe, use it in a single thread per set */
 746 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 747 {
 748         if (!s || !attr)
 749                 return -EINVAL;
 750
 751         if (s->members >= s->max_members)
 752                 return -ENOMEM;
 753
 754         s->group.attrs[s->members] = attr;
 755         s->members++;
 756
 757         return 0;
 758 }
 759
 760 static int add_many_to_attr_set(struct attribute_set *s,
 761                         struct attribute **attr,
 762                         unsigned int count)
 763 {
 764         int i, res;
 765
 766         for (i = 0; i < count; i++) {
 767                 res = add_to_attr_set(s, attr[i]);
 768                 if (res)
 769                         return res;
 770         }
 771
 772         return 0;
 773 }
 774
 775 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 776 {
 777         sysfs_remove_group(kobj, &s->group);
 778         destroy_attr_set(s);
 779 }
 780
 781 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 782         sysfs_create_group(_kobj, &_attr_set->group)
 783
 784 static int parse_strtoul(const char *buf,
 785                 unsigned long max, unsigned long *value)
 786 {
 787         char *endp;
 788
 789         while (*buf && isspace(*buf))
 790                 buf++;
 791         *value = simple_strtoul(buf, &endp, 0);
 792         while (*endp && isspace(*endp))
 793                 endp++;
 794         if (*endp || *value > max)
 795                 return -EINVAL;
 796
 797         return 0;
 798 }
 799
 800 /*************************************************************************
 801  * thinkpad-acpi driver attributes
 802  */
 803
 804 /* interface_version --------------------------------------------------- */
 805 static ssize_t tpacpi_driver_interface_version_show(
 806                                 struct device_driver *drv,
 807                                 char *buf)
 808 {
 809         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 810 }
 811
 812 static DRIVER_ATTR(interface_version, S_IRUGO,
 813                 tpacpi_driver_interface_version_show, NULL);
 814
 815 /* debug_level --------------------------------------------------------- */
 816 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 817                                                 char *buf)
 818 {
 819         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 820 }
 821
 822 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 823                                                 const char *buf, size_t count)
 824 {
 825         unsigned long t;
 826
 827         if (parse_strtoul(buf, 0xffff, &t))
 828                 return -EINVAL;
 829
 830         dbg_level = t;
 831
 832         return count;
 833 }
 834
 835 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 836                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 837
 838 /* version ------------------------------------------------------------- */
 839 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 840                                                 char *buf)
 841 {
 842         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
 843                         TPACPI_DESC, TPACPI_VERSION);
 844 }
 845
 846 static DRIVER_ATTR(version, S_IRUGO,
 847                 tpacpi_driver_version_show, NULL);
 848
 849 /* --------------------------------------------------------------------- */
 850
 851 static struct driver_attribute *tpacpi_driver_attributes[] = {
 852         &driver_attr_debug_level, &driver_attr_version,
 853         &driver_attr_interface_version,
 854 };
 855
 856 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 857 {
 858         int i, res;
 859
 860         i = 0;
 861         res = 0;
 862         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 863                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 864                 i++;
 865         }
 866
 867         return res;
 868 }
 869
 870 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 871 {
 872         int i;
 873
 874         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 875                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 876 }
 877
 878 /****************************************************************************
 879  ****************************************************************************
 880  *
 881  * Subdrivers
 882  *
 883  ****************************************************************************
 884  ****************************************************************************/
 885
 886 /*************************************************************************
 887  * thinkpad-acpi init subdriver
 888  */
 889
 890 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 891 {
 892         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
 893         printk(TPACPI_INFO "%s\n", TPACPI_URL);
 894
 895         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
 896                 (thinkpad_id.bios_version_str) ?
 897                         thinkpad_id.bios_version_str : "unknown",
 898                 (thinkpad_id.ec_version_str) ?
 899                         thinkpad_id.ec_version_str : "unknown");
 900
 901         if (thinkpad_id.vendor && thinkpad_id.model_str)
 902                 printk(TPACPI_INFO "%s %s\n",
 903                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
 904                                 "IBM" : ((thinkpad_id.vendor ==
 905                                                 PCI_VENDOR_ID_LENOVO) ?
 906                                         "Lenovo" : "Unknown vendor"),
 907                         thinkpad_id.model_str);
 908
 909         return 0;
 910 }
 911
 912 static int thinkpad_acpi_driver_read(char *p)
 913 {
 914         int len = 0;
 915
 916         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
 917         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
 918
 919         return len;
 920 }
 921
 922 static struct ibm_struct thinkpad_acpi_driver_data = {
 923         .name = "driver",
 924         .read = thinkpad_acpi_driver_read,
 925 };
 926
 927 /*************************************************************************
 928  * Hotkey subdriver
 929  */
 930
 931 enum {  /* hot key scan codes (derived from ACPI DSDT) */
 932         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
 933         TP_ACPI_HOTKEYSCAN_FNF2,
 934         TP_ACPI_HOTKEYSCAN_FNF3,
 935         TP_ACPI_HOTKEYSCAN_FNF4,
 936         TP_ACPI_HOTKEYSCAN_FNF5,
 937         TP_ACPI_HOTKEYSCAN_FNF6,
 938         TP_ACPI_HOTKEYSCAN_FNF7,
 939         TP_ACPI_HOTKEYSCAN_FNF8,
 940         TP_ACPI_HOTKEYSCAN_FNF9,
 941         TP_ACPI_HOTKEYSCAN_FNF10,
 942         TP_ACPI_HOTKEYSCAN_FNF11,
 943         TP_ACPI_HOTKEYSCAN_FNF12,
 944         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
 945         TP_ACPI_HOTKEYSCAN_FNINSERT,
 946         TP_ACPI_HOTKEYSCAN_FNDELETE,
 947         TP_ACPI_HOTKEYSCAN_FNHOME,
 948         TP_ACPI_HOTKEYSCAN_FNEND,
 949         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
 950         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
 951         TP_ACPI_HOTKEYSCAN_FNSPACE,
 952         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
 953         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
 954         TP_ACPI_HOTKEYSCAN_MUTE,
 955         TP_ACPI_HOTKEYSCAN_THINKPAD,
 956 };
 957
 958 enum {  /* Keys available through NVRAM polling */
 959         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
 960         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
 961 };
 962
 963 enum {  /* Positions of some of the keys in hotkey masks */
 964         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
 965         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
 966         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
 967         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
 968         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
 969         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
 970         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
 971         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
 972         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
 973         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
 974         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
 975 };
 976
 977 enum {  /* NVRAM to ACPI HKEY group map */
 978         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
 979                                           TP_ACPI_HKEY_ZOOM_MASK |
 980                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
 981                                           TP_ACPI_HKEY_HIBERNATE_MASK,
 982         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
 983                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
 984         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
 985                                           TP_ACPI_HKEY_VOLDWN_MASK |
 986                                           TP_ACPI_HKEY_MUTE_MASK,
 987 };
 988
 989 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
 990 struct tp_nvram_state {
 991        u16 thinkpad_toggle:1;
 992        u16 zoom_toggle:1;
 993        u16 display_toggle:1;
 994        u16 thinklight_toggle:1;
 995        u16 hibernate_toggle:1;
 996        u16 displayexp_toggle:1;
 997        u16 display_state:1;
 998        u16 brightness_toggle:1;
 999        u16 volume_toggle:1;
1000        u16 mute:1;
1001
1002        u8 brightness_level;
1003        u8 volume_level;
1004 };
1005
1006 static struct task_struct *tpacpi_hotkey_task;
1007 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1008 static int hotkey_poll_freq = 10;       /* Hz */
1009 static struct mutex hotkey_thread_mutex;
1010 static struct mutex hotkey_thread_data_mutex;
1011 static unsigned int hotkey_config_change;
1012
1013 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1014
1015 #define hotkey_source_mask 0U
1016
1017 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1018
1019 static struct mutex hotkey_mutex;
1020
1021 static enum {   /* Reasons for waking up */
1022         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1023         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1024         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1025 } hotkey_wakeup_reason;
1026
1027 static int hotkey_autosleep_ack;
1028
1029 static int hotkey_orig_status;
1030 static u32 hotkey_orig_mask;
1031 static u32 hotkey_all_mask;
1032 static u32 hotkey_reserved_mask;
1033 static u32 hotkey_mask;
1034
1035 static unsigned int hotkey_report_mode;
1036
1037 static u16 *hotkey_keycode_map;
1038
1039 static struct attribute_set *hotkey_dev_attributes;
1040
1041 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1042 #define HOTKEY_CONFIG_CRITICAL_START \
1043         do { \
1044                 mutex_lock(&hotkey_thread_data_mutex); \
1045                 hotkey_config_change++; \
1046         } while (0);
1047 #define HOTKEY_CONFIG_CRITICAL_END \
1048         mutex_unlock(&hotkey_thread_data_mutex);
1049 #else
1050 #define HOTKEY_CONFIG_CRITICAL_START
1051 #define HOTKEY_CONFIG_CRITICAL_END
1052 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1053
1054 static int hotkey_get_wlsw(int *status)
1055 {
1056         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1057                 return -EIO;
1058         return 0;
1059 }
1060
1061 /*
1062  * Call with hotkey_mutex held
1063  */
1064 static int hotkey_mask_get(void)
1065 {
1066         u32 m = 0;
1067
1068         if (tp_features.hotkey_mask) {
1069                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1070                         return -EIO;
1071         }
1072         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1073
1074         return 0;
1075 }
1076
1077 /*
1078  * Call with hotkey_mutex held
1079  */
1080 static int hotkey_mask_set(u32 mask)
1081 {
1082         int i;
1083         int rc = 0;
1084
1085         if (tp_features.hotkey_mask) {
1086                 HOTKEY_CONFIG_CRITICAL_START
1087                 for (i = 0; i < 32; i++) {
1088                         u32 m = 1 << i;
1089                         /* enable in firmware mask only keys not in NVRAM
1090                          * mode, but enable the key in the cached hotkey_mask
1091                          * regardless of mode, or the key will end up
1092                          * disabled by hotkey_mask_get() */
1093                         if (!acpi_evalf(hkey_handle,
1094                                         NULL, "MHKM", "vdd", i + 1,
1095                                         !!((mask & ~hotkey_source_mask) & m))) {
1096                                 rc = -EIO;
1097                                 break;
1098                         } else {
1099                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1100                         }
1101                 }
1102                 HOTKEY_CONFIG_CRITICAL_END
1103
1104                 /* hotkey_mask_get must be called unconditionally below */
1105                 if (!hotkey_mask_get() && !rc &&
1106                     (hotkey_mask & ~hotkey_source_mask) !=
1107                      (mask & ~hotkey_source_mask)) {
1108                         printk(TPACPI_NOTICE
1109                                "requested hot key mask 0x%08x, but "
1110                                "firmware forced it to 0x%08x\n",
1111                                mask, hotkey_mask);
1112                 }
1113         } else {
1114 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1115                 HOTKEY_CONFIG_CRITICAL_START
1116                 hotkey_mask = mask & hotkey_source_mask;
1117                 HOTKEY_CONFIG_CRITICAL_END
1118                 hotkey_mask_get();
1119                 if (hotkey_mask != mask) {
1120                         printk(TPACPI_NOTICE
1121                                "requested hot key mask 0x%08x, "
1122                                "forced to 0x%08x (NVRAM poll mask is "
1123                                "0x%08x): no firmware mask support\n",
1124                                mask, hotkey_mask, hotkey_source_mask);
1125                 }
1126 #else
1127                 hotkey_mask_get();
1128                 rc = -ENXIO;
1129 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1130         }
1131
1132         return rc;
1133 }
1134
1135 static int hotkey_status_get(int *status)
1136 {
1137         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1138                 return -EIO;
1139
1140         return 0;
1141 }
1142
1143 static int hotkey_status_set(int status)
1144 {
1145         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1146                 return -EIO;
1147
1148         return 0;
1149 }
1150
1151 static void tpacpi_input_send_radiosw(void)
1152 {
1153         int wlsw;
1154
1155         mutex_lock(&tpacpi_inputdev_send_mutex);
1156
1157         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1158                 input_report_switch(tpacpi_inputdev,
1159                                     SW_RADIO, !!wlsw);
1160                 input_sync(tpacpi_inputdev);
1161         }
1162
1163         mutex_unlock(&tpacpi_inputdev_send_mutex);
1164 }
1165
1166 static void tpacpi_input_send_key(unsigned int scancode)
1167 {
1168         unsigned int keycode;
1169
1170         keycode = hotkey_keycode_map[scancode];
1171
1172         if (keycode != KEY_RESERVED) {
1173                 mutex_lock(&tpacpi_inputdev_send_mutex);
1174
1175                 input_report_key(tpacpi_inputdev, keycode, 1);
1176                 if (keycode == KEY_UNKNOWN)
1177                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1178                                     scancode);
1179                 input_sync(tpacpi_inputdev);
1180
1181                 input_report_key(tpacpi_inputdev, keycode, 0);
1182                 if (keycode == KEY_UNKNOWN)
1183                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1184                                     scancode);
1185                 input_sync(tpacpi_inputdev);
1186
1187                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1188         }
1189 }
1190
1191 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1192 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1193
1194 static void tpacpi_hotkey_send_key(unsigned int scancode)
1195 {
1196         tpacpi_input_send_key(scancode);
1197         if (hotkey_report_mode < 2) {
1198                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1199                                                 0x80, 0x1001 + scancode);
1200         }
1201 }
1202
1203 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1204 {
1205         u8 d;
1206
1207         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1208                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1209                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1210                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1211                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1212                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1213         }
1214         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1215                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1216                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1217         }
1218         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1219                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1220                 n->displayexp_toggle =
1221                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1222         }
1223         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1224                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1225                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1226                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1227                 n->brightness_toggle =
1228                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1229         }
1230         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1231                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1232                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1233                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1234                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1235                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1236         }
1237 }
1238
1239 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1240         do { \
1241                 if ((mask & (1 << __scancode)) && \
1242                     oldn->__member != newn->__member) \
1243                 tpacpi_hotkey_send_key(__scancode); \
1244         } while (0)
1245
1246 #define TPACPI_MAY_SEND_KEY(__scancode) \
1247         do { if (mask & (1 << __scancode)) \
1248                 tpacpi_hotkey_send_key(__scancode); } while (0)
1249
1250 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1251                                            struct tp_nvram_state *newn,
1252                                            u32 mask)
1253 {
1254         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1255         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1256         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1257         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1258
1259         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1260
1261         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1262
1263         /* handle volume */
1264         if (oldn->volume_toggle != newn->volume_toggle) {
1265                 if (oldn->mute != newn->mute) {
1266                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1267                 }
1268                 if (oldn->volume_level > newn->volume_level) {
1269                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1270                 } else if (oldn->volume_level < newn->volume_level) {
1271                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1272                 } else if (oldn->mute == newn->mute) {
1273                         /* repeated key presses that didn't change state */
1274                         if (newn->mute) {
1275                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1276                         } else if (newn->volume_level != 0) {
1277                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1278                         } else {
1279                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1280                         }
1281                 }
1282         }
1283
1284         /* handle brightness */
1285         if (oldn->brightness_toggle != newn->brightness_toggle) {
1286                 if (oldn->brightness_level < newn->brightness_level) {
1287                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1288                 } else if (oldn->brightness_level > newn->brightness_level) {
1289                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1290                 } else {
1291                         /* repeated key presses that didn't change state */
1292                         if (newn->brightness_level != 0) {
1293                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1294                         } else {
1295                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1296                         }
1297                 }
1298         }
1299 }
1300
1301 #undef TPACPI_COMPARE_KEY
1302 #undef TPACPI_MAY_SEND_KEY
1303
1304 static int hotkey_kthread(void *data)
1305 {
1306         struct tp_nvram_state s[2];
1307         u32 mask;
1308         unsigned int si, so;
1309         unsigned long t;
1310         unsigned int change_detector, must_reset;
1311
1312         mutex_lock(&hotkey_thread_mutex);
1313
1314         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1315                 goto exit;
1316
1317         set_freezable();
1318
1319         so = 0;
1320         si = 1;
1321         t = 0;
1322
1323         /* Initial state for compares */
1324         mutex_lock(&hotkey_thread_data_mutex);
1325         change_detector = hotkey_config_change;
1326         mask = hotkey_source_mask & hotkey_mask;
1327         mutex_unlock(&hotkey_thread_data_mutex);
1328         hotkey_read_nvram(&s[so], mask);
1329
1330         while (!kthread_should_stop() && hotkey_poll_freq) {
1331                 if (t == 0)
1332                         t = 1000/hotkey_poll_freq;
1333                 t = msleep_interruptible(t);
1334                 if (unlikely(kthread_should_stop()))
1335                         break;
1336                 must_reset = try_to_freeze();
1337                 if (t > 0 && !must_reset)
1338                         continue;
1339
1340                 mutex_lock(&hotkey_thread_data_mutex);
1341                 if (must_reset || hotkey_config_change != change_detector) {
1342                         /* forget old state on thaw or config change */
1343                         si = so;
1344                         t = 0;
1345                         change_detector = hotkey_config_change;
1346                 }
1347                 mask = hotkey_source_mask & hotkey_mask;
1348                 mutex_unlock(&hotkey_thread_data_mutex);
1349
1350                 if (likely(mask)) {
1351                         hotkey_read_nvram(&s[si], mask);
1352                         if (likely(si != so)) {
1353                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1354                                                                 mask);
1355                         }
1356                 }
1357
1358                 so = si;
1359                 si ^= 1;
1360         }
1361
1362 exit:
1363         mutex_unlock(&hotkey_thread_mutex);
1364         return 0;
1365 }
1366
1367 static void hotkey_poll_stop_sync(void)
1368 {
1369         if (tpacpi_hotkey_task) {
1370                 if (frozen(tpacpi_hotkey_task) ||
1371                     freezing(tpacpi_hotkey_task))
1372                         thaw_process(tpacpi_hotkey_task);
1373
1374                 kthread_stop(tpacpi_hotkey_task);
1375                 tpacpi_hotkey_task = NULL;
1376                 mutex_lock(&hotkey_thread_mutex);
1377                 /* at this point, the thread did exit */
1378                 mutex_unlock(&hotkey_thread_mutex);
1379         }
1380 }
1381
1382 /* call with hotkey_mutex held */
1383 static void hotkey_poll_setup(int may_warn)
1384 {
1385         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1386             hotkey_poll_freq > 0 &&
1387             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1388                 if (!tpacpi_hotkey_task) {
1389                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1390                                                          NULL,
1391                                                          TPACPI_FILE "d");
1392                         if (IS_ERR(tpacpi_hotkey_task)) {
1393                                 tpacpi_hotkey_task = NULL;
1394                                 printk(TPACPI_ERR
1395                                        "could not create kernel thread "
1396                                        "for hotkey polling\n");
1397                         }
1398                 }
1399         } else {
1400                 hotkey_poll_stop_sync();
1401                 if (may_warn &&
1402                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1403                         printk(TPACPI_NOTICE
1404                                 "hot keys 0x%08x require polling, "
1405                                 "which is currently disabled\n",
1406                                 hotkey_source_mask);
1407                 }
1408         }
1409 }
1410
1411 static void hotkey_poll_setup_safe(int may_warn)
1412 {
1413         mutex_lock(&hotkey_mutex);
1414         hotkey_poll_setup(may_warn);
1415         mutex_unlock(&hotkey_mutex);
1416 }
1417
1418 static int hotkey_inputdev_open(struct input_dev *dev)
1419 {
1420         switch (tpacpi_lifecycle) {
1421         case TPACPI_LIFE_INIT:
1422                 /*
1423                  * hotkey_init will call hotkey_poll_setup_safe
1424                  * at the appropriate moment
1425                  */
1426                 return 0;
1427         case TPACPI_LIFE_EXITING:
1428                 return -EBUSY;
1429         case TPACPI_LIFE_RUNNING:
1430                 hotkey_poll_setup_safe(0);
1431                 return 0;
1432         }
1433
1434         /* Should only happen if tpacpi_lifecycle is corrupt */
1435         BUG();
1436         return -EBUSY;
1437 }
1438
1439 static void hotkey_inputdev_close(struct input_dev *dev)
1440 {
1441         /* disable hotkey polling when possible */
1442         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1443                 hotkey_poll_setup_safe(0);
1444 }
1445 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1446
1447 /* sysfs hotkey enable ------------------------------------------------- */
1448 static ssize_t hotkey_enable_show(struct device *dev,
1449                            struct device_attribute *attr,
1450                            char *buf)
1451 {
1452         int res, status;
1453
1454         res = hotkey_status_get(&status);
1455         if (res)
1456                 return res;
1457
1458         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1459 }
1460
1461 static ssize_t hotkey_enable_store(struct device *dev,
1462                             struct device_attribute *attr,
1463                             const char *buf, size_t count)
1464 {
1465         unsigned long t;
1466         int res;
1467
1468         if (parse_strtoul(buf, 1, &t))
1469                 return -EINVAL;
1470
1471         res = hotkey_status_set(t);
1472
1473         return (res) ? res : count;
1474 }
1475
1476 static struct device_attribute dev_attr_hotkey_enable =
1477         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1478                 hotkey_enable_show, hotkey_enable_store);
1479
1480 /* sysfs hotkey mask --------------------------------------------------- */
1481 static ssize_t hotkey_mask_show(struct device *dev,
1482                            struct device_attribute *attr,
1483                            char *buf)
1484 {
1485         int res;
1486
1487         if (mutex_lock_interruptible(&hotkey_mutex))
1488                 return -ERESTARTSYS;
1489         res = hotkey_mask_get();
1490         mutex_unlock(&hotkey_mutex);
1491
1492         return (res)?
1493                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1494 }
1495
1496 static ssize_t hotkey_mask_store(struct device *dev,
1497                             struct device_attribute *attr,
1498                             const char *buf, size_t count)
1499 {
1500         unsigned long t;
1501         int res;
1502
1503         if (parse_strtoul(buf, 0xffffffffUL, &t))
1504                 return -EINVAL;
1505
1506         if (mutex_lock_interruptible(&hotkey_mutex))
1507                 return -ERESTARTSYS;
1508
1509         res = hotkey_mask_set(t);
1510
1511 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1512         hotkey_poll_setup(1);
1513 #endif
1514
1515         mutex_unlock(&hotkey_mutex);
1516
1517         return (res) ? res : count;
1518 }
1519
1520 static struct device_attribute dev_attr_hotkey_mask =
1521         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1522                 hotkey_mask_show, hotkey_mask_store);
1523
1524 /* sysfs hotkey bios_enabled ------------------------------------------- */
1525 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1526                            struct device_attribute *attr,
1527                            char *buf)
1528 {
1529         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1530 }
1531
1532 static struct device_attribute dev_attr_hotkey_bios_enabled =
1533         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1534
1535 /* sysfs hotkey bios_mask ---------------------------------------------- */
1536 static ssize_t hotkey_bios_mask_show(struct device *dev,
1537                            struct device_attribute *attr,
1538                            char *buf)
1539 {
1540         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1541 }
1542
1543 static struct device_attribute dev_attr_hotkey_bios_mask =
1544         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1545
1546 /* sysfs hotkey all_mask ----------------------------------------------- */
1547 static ssize_t hotkey_all_mask_show(struct device *dev,
1548                            struct device_attribute *attr,
1549                            char *buf)
1550 {
1551         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1552                                 hotkey_all_mask | hotkey_source_mask);
1553 }
1554
1555 static struct device_attribute dev_attr_hotkey_all_mask =
1556         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1557
1558 /* sysfs hotkey recommended_mask --------------------------------------- */
1559 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1560                                             struct device_attribute *attr,
1561                                             char *buf)
1562 {
1563         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1564                         (hotkey_all_mask | hotkey_source_mask)
1565                         & ~hotkey_reserved_mask);
1566 }
1567
1568 static struct device_attribute dev_attr_hotkey_recommended_mask =
1569         __ATTR(hotkey_recommended_mask, S_IRUGO,
1570                 hotkey_recommended_mask_show, NULL);
1571
1572 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1573
1574 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1575 static ssize_t hotkey_source_mask_show(struct device *dev,
1576                            struct device_attribute *attr,
1577                            char *buf)
1578 {
1579         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1580 }
1581
1582 static ssize_t hotkey_source_mask_store(struct device *dev,
1583                             struct device_attribute *attr,
1584                             const char *buf, size_t count)
1585 {
1586         unsigned long t;
1587
1588         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1589                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1590                 return -EINVAL;
1591
1592         if (mutex_lock_interruptible(&hotkey_mutex))
1593                 return -ERESTARTSYS;
1594
1595         HOTKEY_CONFIG_CRITICAL_START
1596         hotkey_source_mask = t;
1597         HOTKEY_CONFIG_CRITICAL_END
1598
1599         hotkey_poll_setup(1);
1600
1601         mutex_unlock(&hotkey_mutex);
1602
1603         return count;
1604 }
1605
1606 static struct device_attribute dev_attr_hotkey_source_mask =
1607         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1608                 hotkey_source_mask_show, hotkey_source_mask_store);
1609
1610 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1611 static ssize_t hotkey_poll_freq_show(struct device *dev,
1612                            struct device_attribute *attr,
1613                            char *buf)
1614 {
1615         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1616 }
1617
1618 static ssize_t hotkey_poll_freq_store(struct device *dev,
1619                             struct device_attribute *attr,
1620                             const char *buf, size_t count)
1621 {
1622         unsigned long t;
1623
1624         if (parse_strtoul(buf, 25, &t))
1625                 return -EINVAL;
1626
1627         if (mutex_lock_interruptible(&hotkey_mutex))
1628                 return -ERESTARTSYS;
1629
1630         hotkey_poll_freq = t;
1631
1632         hotkey_poll_setup(1);
1633         mutex_unlock(&hotkey_mutex);
1634
1635         return count;
1636 }
1637
1638 static struct device_attribute dev_attr_hotkey_poll_freq =
1639         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1640                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1641
1642 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1643
1644 /* sysfs hotkey radio_sw ----------------------------------------------- */
1645 static ssize_t hotkey_radio_sw_show(struct device *dev,
1646                            struct device_attribute *attr,
1647                            char *buf)
1648 {
1649         int res, s;
1650         res = hotkey_get_wlsw(&s);
1651         if (res < 0)
1652                 return res;
1653
1654         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1655 }
1656
1657 static struct device_attribute dev_attr_hotkey_radio_sw =
1658         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1659
1660 /* sysfs hotkey report_mode -------------------------------------------- */
1661 static ssize_t hotkey_report_mode_show(struct device *dev,
1662                            struct device_attribute *attr,
1663                            char *buf)
1664 {
1665         return snprintf(buf, PAGE_SIZE, "%d\n",
1666                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1667 }
1668
1669 static struct device_attribute dev_attr_hotkey_report_mode =
1670         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1671
1672 /* sysfs wakeup reason ------------------------------------------------- */
1673 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1674                            struct device_attribute *attr,
1675                            char *buf)
1676 {
1677         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1678 }
1679
1680 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1681         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1682
1683 /* sysfs wakeup hotunplug_complete ------------------------------------- */
1684 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1685                            struct device_attribute *attr,
1686                            char *buf)
1687 {
1688         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1689 }
1690
1691 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1692         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1693                hotkey_wakeup_hotunplug_complete_show, NULL);
1694
1695 /* --------------------------------------------------------------------- */
1696
1697 static struct attribute *hotkey_attributes[] __initdata = {
1698         &dev_attr_hotkey_enable.attr,
1699         &dev_attr_hotkey_bios_enabled.attr,
1700         &dev_attr_hotkey_report_mode.attr,
1701 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1702         &dev_attr_hotkey_mask.attr,
1703         &dev_attr_hotkey_all_mask.attr,
1704         &dev_attr_hotkey_recommended_mask.attr,
1705         &dev_attr_hotkey_source_mask.attr,
1706         &dev_attr_hotkey_poll_freq.attr,
1707 #endif
1708 };
1709
1710 static struct attribute *hotkey_mask_attributes[] __initdata = {
1711         &dev_attr_hotkey_bios_mask.attr,
1712 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1713         &dev_attr_hotkey_mask.attr,
1714         &dev_attr_hotkey_all_mask.attr,
1715         &dev_attr_hotkey_recommended_mask.attr,
1716 #endif
1717         &dev_attr_hotkey_wakeup_reason.attr,
1718         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1719 };
1720
1721 static int __init hotkey_init(struct ibm_init_struct *iibm)
1722 {
1723         /* Requirements for changing the default keymaps:
1724          *
1725          * 1. Many of the keys are mapped to KEY_RESERVED for very
1726          *    good reasons.  Do not change them unless you have deep
1727          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1728          *    the various ThinkPad models.  The driver behaves
1729          *    differently for KEY_RESERVED: such keys have their
1730          *    hot key mask *unset* in mask_recommended, and also
1731          *    in the initial hot key mask programmed into the
1732          *    firmware at driver load time, which means the firm-
1733          *    ware may react very differently if you change them to
1734          *    something else;
1735          *
1736          * 2. You must be subscribed to the linux-thinkpad and
1737          *    ibm-acpi-devel mailing lists, and you should read the
1738          *    list archives since 2007 if you want to change the
1739          *    keymaps.  This requirement exists so that you will
1740          *    know the past history of problems with the thinkpad-
1741          *    acpi driver keymaps, and also that you will be
1742          *    listening to any bug reports;
1743          *
1744          * 3. Do not send thinkpad-acpi specific patches directly to
1745          *    for merging, *ever*.  Send them to the linux-acpi
1746          *    mailinglist for comments.  Merging is to be done only
1747          *    through acpi-test and the ACPI maintainer.
1748          *
1749          * If the above is too much to ask, don't change the keymap.
1750          * Ask the thinkpad-acpi maintainer to do it, instead.
1751          */
1752         static u16 ibm_keycode_map[] __initdata = {
1753                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1754                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1755                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1756                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1757
1758                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1759                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1760                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1761                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1762
1763                 /* brightness: firmware always reacts to them, unless
1764                  * X.org did some tricks in the radeon BIOS scratch
1765                  * registers of *some* models */
1766                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1767                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1768
1769                 /* Thinklight: firmware always react to it */
1770                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1771
1772                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1773                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1774
1775                 /* Volume: firmware always react to it and reprograms
1776                  * the built-in *extra* mixer.  Never map it to control
1777                  * another mixer by default. */
1778                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1779                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1780                 KEY_RESERVED,   /* 0x16: MUTE */
1781
1782                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1783
1784                 /* (assignments unknown, please report if found) */
1785                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1786                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1787         };
1788         static u16 lenovo_keycode_map[] __initdata = {
1789                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1790                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
1791                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1792                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1793
1794                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1795                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1796                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1797                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1798
1799                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1800                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1801
1802                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1803
1804                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1805                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1806
1807                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
1808                  * react to it and reprograms the built-in *extra* mixer.
1809                  * Never map it to control another mixer by default.
1810                  *
1811                  * T60?, T61, R60?, R61: firmware and EC tries to send
1812                  * these over the regular keyboard, so these are no-ops,
1813                  * but there are still weird bugs re. MUTE, so do not
1814                  * change unless you get test reports from all Lenovo
1815                  * models.  May cause the BIOS to interfere with the
1816                  * HDA mixer.
1817                  */
1818                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1819                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1820                 KEY_RESERVED,   /* 0x16: MUTE */
1821
1822                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1823
1824                 /* (assignments unknown, please report if found) */
1825                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1826                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1827         };
1828
1829 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
1830 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
1831 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
1832
1833         int res, i;
1834         int status;
1835         int hkeyv;
1836
1837         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1838
1839         BUG_ON(!tpacpi_inputdev);
1840         BUG_ON(tpacpi_inputdev->open != NULL ||
1841                tpacpi_inputdev->close != NULL);
1842
1843         TPACPI_ACPIHANDLE_INIT(hkey);
1844         mutex_init(&hotkey_mutex);
1845
1846 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1847         mutex_init(&hotkey_thread_mutex);
1848         mutex_init(&hotkey_thread_data_mutex);
1849 #endif
1850
1851         /* hotkey not supported on 570 */
1852         tp_features.hotkey = hkey_handle != NULL;
1853
1854         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1855                 str_supported(tp_features.hotkey));
1856
1857         if (tp_features.hotkey) {
1858                 hotkey_dev_attributes = create_attr_set(12, NULL);
1859                 if (!hotkey_dev_attributes)
1860                         return -ENOMEM;
1861                 res = add_many_to_attr_set(hotkey_dev_attributes,
1862                                 hotkey_attributes,
1863                                 ARRAY_SIZE(hotkey_attributes));
1864                 if (res)
1865                         return res;
1866
1867                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1868                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
1869                    for HKEY interface version 0x100 */
1870                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1871                         if ((hkeyv >> 8) != 1) {
1872                                 printk(TPACPI_ERR "unknown version of the "
1873                                        "HKEY interface: 0x%x\n", hkeyv);
1874                                 printk(TPACPI_ERR "please report this to %s\n",
1875                                        TPACPI_MAIL);
1876                         } else {
1877                                 /*
1878                                  * MHKV 0x100 in A31, R40, R40e,
1879                                  * T4x, X31, and later
1880                                  */
1881                                 tp_features.hotkey_mask = 1;
1882                         }
1883                 }
1884
1885                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1886                         str_supported(tp_features.hotkey_mask));
1887
1888                 if (tp_features.hotkey_mask) {
1889                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1890                                         "MHKA", "qd")) {
1891                                 printk(TPACPI_ERR
1892                                        "missing MHKA handler, "
1893                                        "please report this to %s\n",
1894                                        TPACPI_MAIL);
1895                                 /* FN+F12, FN+F4, FN+F3 */
1896                                 hotkey_all_mask = 0x080cU;
1897                         }
1898                 }
1899
1900                 /* hotkey_source_mask *must* be zero for
1901                  * the first hotkey_mask_get */
1902                 res = hotkey_status_get(&hotkey_orig_status);
1903                 if (!res && tp_features.hotkey_mask) {
1904                         res = hotkey_mask_get();
1905                         hotkey_orig_mask = hotkey_mask;
1906                         if (!res) {
1907                                 res = add_many_to_attr_set(
1908                                         hotkey_dev_attributes,
1909                                         hotkey_mask_attributes,
1910                                         ARRAY_SIZE(hotkey_mask_attributes));
1911                         }
1912                 }
1913
1914 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1915                 if (tp_features.hotkey_mask) {
1916                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
1917                                                 & ~hotkey_all_mask;
1918                 } else {
1919                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
1920                 }
1921
1922                 vdbg_printk(TPACPI_DBG_INIT,
1923                             "hotkey source mask 0x%08x, polling freq %d\n",
1924                             hotkey_source_mask, hotkey_poll_freq);
1925 #endif
1926
1927                 /* Not all thinkpads have a hardware radio switch */
1928                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
1929                         tp_features.hotkey_wlsw = 1;
1930                         printk(TPACPI_INFO
1931                                 "radio switch found; radios are %s\n",
1932                                 enabled(status, 0));
1933                         res = add_to_attr_set(hotkey_dev_attributes,
1934                                         &dev_attr_hotkey_radio_sw.attr);
1935                 }
1936
1937                 if (!res)
1938                         res = register_attr_set_with_sysfs(
1939                                         hotkey_dev_attributes,
1940                                         &tpacpi_pdev->dev.kobj);
1941                 if (res)
1942                         return res;
1943
1944                 /* Set up key map */
1945
1946                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
1947                                                 GFP_KERNEL);
1948                 if (!hotkey_keycode_map) {
1949                         printk(TPACPI_ERR
1950                                 "failed to allocate memory for key map\n");
1951                         return -ENOMEM;
1952                 }
1953
1954                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
1955                         dbg_printk(TPACPI_DBG_INIT,
1956                                    "using Lenovo default hot key map\n");
1957                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
1958                                 TPACPI_HOTKEY_MAP_SIZE);
1959                 } else {
1960                         dbg_printk(TPACPI_DBG_INIT,
1961                                    "using IBM default hot key map\n");
1962                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
1963                                 TPACPI_HOTKEY_MAP_SIZE);
1964                 }
1965
1966                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
1967                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
1968                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
1969                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
1970                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
1971                 tpacpi_inputdev->keycode = hotkey_keycode_map;
1972                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
1973                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
1974                                 set_bit(hotkey_keycode_map[i],
1975                                         tpacpi_inputdev->keybit);
1976                         } else {
1977                                 if (i < sizeof(hotkey_reserved_mask)*8)
1978                                         hotkey_reserved_mask |= 1 << i;
1979                         }
1980                 }
1981
1982                 if (tp_features.hotkey_wlsw) {
1983                         set_bit(EV_SW, tpacpi_inputdev->evbit);
1984                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
1985                 }
1986
1987                 dbg_printk(TPACPI_DBG_INIT,
1988                                 "enabling hot key handling\n");
1989                 res = hotkey_status_set(1);
1990                 if (res)
1991                         return res;
1992                 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
1993                                         & ~hotkey_reserved_mask)
1994                                         | hotkey_orig_mask);
1995                 if (res < 0 && res != -ENXIO)
1996                         return res;
1997
1998                 dbg_printk(TPACPI_DBG_INIT,
1999                                 "legacy hot key reporting over procfs %s\n",
2000                                 (hotkey_report_mode < 2) ?
2001                                         "enabled" : "disabled");
2002
2003 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2004                 tpacpi_inputdev->open = &hotkey_inputdev_open;
2005                 tpacpi_inputdev->close = &hotkey_inputdev_close;
2006
2007                 hotkey_poll_setup_safe(1);
2008 #endif
2009         }
2010
2011         return (tp_features.hotkey)? 0 : 1;
2012 }
2013
2014 static void hotkey_exit(void)
2015 {
2016 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2017         hotkey_poll_stop_sync();
2018 #endif
2019
2020         if (tp_features.hotkey) {
2021                 dbg_printk(TPACPI_DBG_EXIT,
2022                            "restoring original hot key mask\n");
2023                 /* no short-circuit boolean operator below! */
2024                 if ((hotkey_mask_set(hotkey_orig_mask) |
2025                      hotkey_status_set(hotkey_orig_status)) != 0)
2026                         printk(TPACPI_ERR
2027                                "failed to restore hot key mask "
2028                                "to BIOS defaults\n");
2029         }
2030
2031         if (hotkey_dev_attributes) {
2032                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2033                 hotkey_dev_attributes = NULL;
2034         }
2035 }
2036
2037 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2038 {
2039         u32 hkey;
2040         unsigned int scancode;
2041         int send_acpi_ev;
2042         int ignore_acpi_ev;
2043         int unk_ev;
2044
2045         if (event != 0x80) {
2046                 printk(TPACPI_ERR
2047                        "unknown HKEY notification event %d\n", event);
2048                 /* forward it to userspace, maybe it knows how to handle it */
2049                 acpi_bus_generate_netlink_event(
2050                                         ibm->acpi->device->pnp.device_class,
2051                                         ibm->acpi->device->dev.bus_id,
2052                                         event, 0);
2053                 return;
2054         }
2055
2056         while (1) {
2057                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2058                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2059                         return;
2060                 }
2061
2062                 if (hkey == 0) {
2063                         /* queue empty */
2064                         return;
2065                 }
2066
2067                 send_acpi_ev = 1;
2068                 ignore_acpi_ev = 0;
2069                 unk_ev = 0;
2070
2071                 switch (hkey >> 12) {
2072                 case 1:
2073                         /* 0x1000-0x1FFF: key presses */
2074                         scancode = hkey & 0xfff;
2075                         if (scancode > 0 && scancode < 0x21) {
2076                                 scancode--;
2077                                 if (!(hotkey_source_mask & (1 << scancode))) {
2078                                         tpacpi_input_send_key(scancode);
2079                                         send_acpi_ev = 0;
2080                                 } else {
2081                                         ignore_acpi_ev = 1;
2082                                 }
2083                         } else {
2084                                 unk_ev = 1;
2085                         }
2086                         break;
2087                 case 2:
2088                         /* Wakeup reason */
2089                         switch (hkey) {
2090                         case 0x2304: /* suspend, undock */
2091                         case 0x2404: /* hibernation, undock */
2092                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2093                                 ignore_acpi_ev = 1;
2094                                 break;
2095                         case 0x2305: /* suspend, bay eject */
2096                         case 0x2405: /* hibernation, bay eject */
2097                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2098                                 ignore_acpi_ev = 1;
2099                                 break;
2100                         default:
2101                                 unk_ev = 1;
2102                         }
2103                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2104                                 printk(TPACPI_INFO
2105                                        "woke up due to a hot-unplug "
2106                                        "request...\n");
2107                         }
2108                         break;
2109                 case 3:
2110                         /* bay-related wakeups */
2111                         if (hkey == 0x3003) {
2112                                 hotkey_autosleep_ack = 1;
2113                                 printk(TPACPI_INFO
2114                                        "bay ejected\n");
2115                         } else {
2116                                 unk_ev = 1;
2117                         }
2118                         break;
2119                 case 4:
2120                         /* dock-related wakeups */
2121                         if (hkey == 0x4003) {
2122                                 hotkey_autosleep_ack = 1;
2123                                 printk(TPACPI_INFO
2124                                        "undocked\n");
2125                         } else {
2126                                 unk_ev = 1;
2127                         }
2128                         break;
2129                 case 5:
2130                         /* 0x5000-0x5FFF: On screen display helpers */
2131                         switch (hkey) {
2132                         case 0x5010:
2133                                 /* Lenovo Vista BIOS: brightness changed */
2134                                 break;
2135                         case 0x5001:
2136                         case 0x5002:
2137                                 /* LID switch events.  Do not propagate */
2138                                 ignore_acpi_ev = 1;
2139                                 break;
2140                         default:
2141                                 unk_ev = 1;
2142                         }
2143                         break;
2144                 case 7:
2145                         /* 0x7000-0x7FFF: misc */
2146                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2147                                 tpacpi_input_send_radiosw();
2148                                 send_acpi_ev = 0;
2149                                 break;
2150                         }
2151                         /* fallthrough to default */
2152                 default:
2153                         unk_ev = 1;
2154                 }
2155                 if (unk_ev) {
2156                         printk(TPACPI_NOTICE
2157                                "unhandled HKEY event 0x%04x\n", hkey);
2158                 }
2159
2160                 /* Legacy events */
2161                 if (!ignore_acpi_ev &&
2162                     (send_acpi_ev || hotkey_report_mode < 2)) {
2163                         acpi_bus_generate_proc_event(ibm->acpi->device,
2164                                                      event, hkey);
2165                 }
2166
2167                 /* netlink events */
2168                 if (!ignore_acpi_ev && send_acpi_ev) {
2169                         acpi_bus_generate_netlink_event(
2170                                         ibm->acpi->device->pnp.device_class,
2171                                         ibm->acpi->device->dev.bus_id,
2172                                         event, hkey);
2173                 }
2174         }
2175 }
2176
2177 static void hotkey_suspend(pm_message_t state)
2178 {
2179         /* Do these on suspend, we get the events on early resume! */
2180         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2181         hotkey_autosleep_ack = 0;
2182 }
2183
2184 static void hotkey_resume(void)
2185 {
2186         if (hotkey_mask_get())
2187                 printk(TPACPI_ERR
2188                        "error while trying to read hot key mask "
2189                        "from firmware\n");
2190         tpacpi_input_send_radiosw();
2191 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2192         hotkey_poll_setup_safe(0);
2193 #endif
2194 }
2195
2196 /* procfs -------------------------------------------------------------- */
2197 static int hotkey_read(char *p)
2198 {
2199         int res, status;
2200         int len = 0;
2201
2202         if (!tp_features.hotkey) {
2203                 len += sprintf(p + len, "status:\t\tnot supported\n");
2204                 return len;
2205         }
2206
2207         if (mutex_lock_interruptible(&hotkey_mutex))
2208                 return -ERESTARTSYS;
2209         res = hotkey_status_get(&status);
2210         if (!res)
2211                 res = hotkey_mask_get();
2212         mutex_unlock(&hotkey_mutex);
2213         if (res)
2214                 return res;
2215
2216         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2217         if (tp_features.hotkey_mask) {
2218                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2219                 len += sprintf(p + len,
2220                                "commands:\tenable, disable, reset, <mask>\n");
2221         } else {
2222                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2223                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2224         }
2225
2226         return len;
2227 }
2228
2229 static int hotkey_write(char *buf)
2230 {
2231         int res, status;
2232         u32 mask;
2233         char *cmd;
2234
2235         if (!tp_features.hotkey)
2236                 return -ENODEV;
2237
2238         if (mutex_lock_interruptible(&hotkey_mutex))
2239                 return -ERESTARTSYS;
2240
2241         status = -1;
2242         mask = hotkey_mask;
2243
2244         res = 0;
2245         while ((cmd = next_cmd(&buf))) {
2246                 if (strlencmp(cmd, "enable") == 0) {
2247                         status = 1;
2248                 } else if (strlencmp(cmd, "disable") == 0) {
2249                         status = 0;
2250                 } else if (strlencmp(cmd, "reset") == 0) {
2251                         status = hotkey_orig_status;
2252                         mask = hotkey_orig_mask;
2253                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2254                         /* mask set */
2255                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2256                         /* mask set */
2257                 } else {
2258                         res = -EINVAL;
2259                         goto errexit;
2260                 }
2261         }
2262         if (status != -1)
2263                 res = hotkey_status_set(status);
2264
2265         if (!res && mask != hotkey_mask)
2266                 res = hotkey_mask_set(mask);
2267
2268 errexit:
2269         mutex_unlock(&hotkey_mutex);
2270         return res;
2271 }
2272
2273 static const struct acpi_device_id ibm_htk_device_ids[] = {
2274         {TPACPI_ACPI_HKEY_HID, 0},
2275         {"", 0},
2276 };
2277
2278 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2279         .hid = ibm_htk_device_ids,
2280         .notify = hotkey_notify,
2281         .handle = &hkey_handle,
2282         .type = ACPI_DEVICE_NOTIFY,
2283 };
2284
2285 static struct ibm_struct hotkey_driver_data = {
2286         .name = "hotkey",
2287         .read = hotkey_read,
2288         .write = hotkey_write,
2289         .exit = hotkey_exit,
2290         .resume = hotkey_resume,
2291         .suspend = hotkey_suspend,
2292         .acpi = &ibm_hotkey_acpidriver,
2293 };
2294
2295 /*************************************************************************
2296  * Bluetooth subdriver
2297  */
2298
2299 enum {
2300         /* ACPI GBDC/SBDC bits */
2301         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2302         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2303         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2304 };
2305
2306 static int bluetooth_get_radiosw(void);
2307 static int bluetooth_set_radiosw(int radio_on);
2308
2309 /* sysfs bluetooth enable ---------------------------------------------- */
2310 static ssize_t bluetooth_enable_show(struct device *dev,
2311                            struct device_attribute *attr,
2312                            char *buf)
2313 {
2314         int status;
2315
2316         status = bluetooth_get_radiosw();
2317         if (status < 0)
2318                 return status;
2319
2320         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2321 }
2322
2323 static ssize_t bluetooth_enable_store(struct device *dev,
2324                             struct device_attribute *attr,
2325                             const char *buf, size_t count)
2326 {
2327         unsigned long t;
2328         int res;
2329
2330         if (parse_strtoul(buf, 1, &t))
2331                 return -EINVAL;
2332
2333         res = bluetooth_set_radiosw(t);
2334
2335         return (res) ? res : count;
2336 }
2337
2338 static struct device_attribute dev_attr_bluetooth_enable =
2339         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2340                 bluetooth_enable_show, bluetooth_enable_store);
2341
2342 /* --------------------------------------------------------------------- */
2343
2344 static struct attribute *bluetooth_attributes[] = {
2345         &dev_attr_bluetooth_enable.attr,
2346         NULL
2347 };
2348
2349 static const struct attribute_group bluetooth_attr_group = {
2350         .attrs = bluetooth_attributes,
2351 };
2352
2353 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2354 {
2355         int res;
2356         int status = 0;
2357
2358         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2359
2360         TPACPI_ACPIHANDLE_INIT(hkey);
2361
2362         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2363            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2364         tp_features.bluetooth = hkey_handle &&
2365             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2366
2367         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2368                 str_supported(tp_features.bluetooth),
2369                 status);
2370
2371         if (tp_features.bluetooth) {
2372                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2373                         /* no bluetooth hardware present in system */
2374                         tp_features.bluetooth = 0;
2375                         dbg_printk(TPACPI_DBG_INIT,
2376                                    "bluetooth hardware not installed\n");
2377                 } else {
2378                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2379                                         &bluetooth_attr_group);
2380                         if (res)
2381                                 return res;
2382                 }
2383         }
2384
2385         return (tp_features.bluetooth)? 0 : 1;
2386 }
2387
2388 static void bluetooth_exit(void)
2389 {
2390         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2391                         &bluetooth_attr_group);
2392 }
2393
2394 static int bluetooth_get_radiosw(void)
2395 {
2396         int status;
2397
2398         if (!tp_features.bluetooth)
2399                 return -ENODEV;
2400
2401         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2402                 return -EIO;
2403
2404         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2405 }
2406
2407 static int bluetooth_set_radiosw(int radio_on)
2408 {
2409         int status;
2410
2411         if (!tp_features.bluetooth)
2412                 return -ENODEV;
2413
2414         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2415                 return -EIO;
2416         if (radio_on)
2417                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2418         else
2419                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2420         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2421                 return -EIO;
2422
2423         return 0;
2424 }
2425
2426 /* procfs -------------------------------------------------------------- */
2427 static int bluetooth_read(char *p)
2428 {
2429         int len = 0;
2430         int status = bluetooth_get_radiosw();
2431
2432         if (!tp_features.bluetooth)
2433                 len += sprintf(p + len, "status:\t\tnot supported\n");
2434         else {
2435                 len += sprintf(p + len, "status:\t\t%s\n",
2436                                 (status)? "enabled" : "disabled");
2437                 len += sprintf(p + len, "commands:\tenable, disable\n");
2438         }
2439
2440         return len;
2441 }
2442
2443 static int bluetooth_write(char *buf)
2444 {
2445         char *cmd;
2446
2447         if (!tp_features.bluetooth)
2448                 return -ENODEV;
2449
2450         while ((cmd = next_cmd(&buf))) {
2451                 if (strlencmp(cmd, "enable") == 0) {
2452                         bluetooth_set_radiosw(1);
2453                 } else if (strlencmp(cmd, "disable") == 0) {
2454                         bluetooth_set_radiosw(0);
2455                 } else
2456                         return -EINVAL;
2457         }
2458
2459         return 0;
2460 }
2461
2462 static struct ibm_struct bluetooth_driver_data = {
2463         .name = "bluetooth",
2464         .read = bluetooth_read,
2465         .write = bluetooth_write,
2466         .exit = bluetooth_exit,
2467 };
2468
2469 /*************************************************************************
2470  * Wan subdriver
2471  */
2472
2473 enum {
2474         /* ACPI GWAN/SWAN bits */
2475         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2476         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2477         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2478 };
2479
2480 static int wan_get_radiosw(void);
2481 static int wan_set_radiosw(int radio_on);
2482
2483 /* sysfs wan enable ---------------------------------------------------- */
2484 static ssize_t wan_enable_show(struct device *dev,
2485                            struct device_attribute *attr,
2486                            char *buf)
2487 {
2488         int status;
2489
2490         status = wan_get_radiosw();
2491         if (status < 0)
2492                 return status;
2493
2494         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2495 }
2496
2497 static ssize_t wan_enable_store(struct device *dev,
2498                             struct device_attribute *attr,
2499                             const char *buf, size_t count)
2500 {
2501         unsigned long t;
2502         int res;
2503
2504         if (parse_strtoul(buf, 1, &t))
2505                 return -EINVAL;
2506
2507         res = wan_set_radiosw(t);
2508
2509         return (res) ? res : count;
2510 }
2511
2512 static struct device_attribute dev_attr_wan_enable =
2513         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2514                 wan_enable_show, wan_enable_store);
2515
2516 /* --------------------------------------------------------------------- */
2517
2518 static struct attribute *wan_attributes[] = {
2519         &dev_attr_wan_enable.attr,
2520         NULL
2521 };
2522
2523 static const struct attribute_group wan_attr_group = {
2524         .attrs = wan_attributes,
2525 };
2526
2527 static int __init wan_init(struct ibm_init_struct *iibm)
2528 {
2529         int res;
2530         int status = 0;
2531
2532         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2533
2534         TPACPI_ACPIHANDLE_INIT(hkey);
2535
2536         tp_features.wan = hkey_handle &&
2537             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2538
2539         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2540                 str_supported(tp_features.wan),
2541                 status);
2542
2543         if (tp_features.wan) {
2544                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2545                         /* no wan hardware present in system */
2546                         tp_features.wan = 0;
2547                         dbg_printk(TPACPI_DBG_INIT,
2548                                    "wan hardware not installed\n");
2549                 } else {
2550                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2551                                         &wan_attr_group);
2552                         if (res)
2553                                 return res;
2554                 }
2555         }
2556
2557         return (tp_features.wan)? 0 : 1;
2558 }
2559
2560 static void wan_exit(void)
2561 {
2562         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2563                 &wan_attr_group);
2564 }
2565
2566 static int wan_get_radiosw(void)
2567 {
2568         int status;
2569
2570         if (!tp_features.wan)
2571                 return -ENODEV;
2572
2573         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2574                 return -EIO;
2575
2576         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2577 }
2578
2579 static int wan_set_radiosw(int radio_on)
2580 {
2581         int status;
2582
2583         if (!tp_features.wan)
2584                 return -ENODEV;
2585
2586         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2587                 return -EIO;
2588         if (radio_on)
2589                 status |= TP_ACPI_WANCARD_RADIOSSW;
2590         else
2591                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2592         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2593                 return -EIO;
2594
2595         return 0;
2596 }
2597
2598 /* procfs -------------------------------------------------------------- */
2599 static int wan_read(char *p)
2600 {
2601         int len = 0;
2602         int status = wan_get_radiosw();
2603
2604         if (!tp_features.wan)
2605                 len += sprintf(p + len, "status:\t\tnot supported\n");
2606         else {
2607                 len += sprintf(p + len, "status:\t\t%s\n",
2608                                 (status)? "enabled" : "disabled");
2609                 len += sprintf(p + len, "commands:\tenable, disable\n");
2610         }
2611
2612         return len;
2613 }
2614
2615 static int wan_write(char *buf)
2616 {
2617         char *cmd;
2618
2619         if (!tp_features.wan)
2620                 return -ENODEV;
2621
2622         while ((cmd = next_cmd(&buf))) {
2623                 if (strlencmp(cmd, "enable") == 0) {
2624                         wan_set_radiosw(1);
2625                 } else if (strlencmp(cmd, "disable") == 0) {
2626                         wan_set_radiosw(0);
2627                 } else
2628                         return -EINVAL;
2629         }
2630
2631         return 0;
2632 }
2633
2634 static struct ibm_struct wan_driver_data = {
2635         .name = "wan",
2636         .read = wan_read,
2637         .write = wan_write,
2638         .exit = wan_exit,
2639         .flags.experimental = 1,
2640 };
2641
2642 /*************************************************************************
2643  * Video subdriver
2644  */
2645
2646 enum video_access_mode {
2647         TPACPI_VIDEO_NONE = 0,
2648         TPACPI_VIDEO_570,       /* 570 */
2649         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2650         TPACPI_VIDEO_NEW,       /* all others */
2651 };
2652
2653 enum {  /* video status flags, based on VIDEO_570 */
2654         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2655         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2656         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2657 };
2658
2659 enum {  /* TPACPI_VIDEO_570 constants */
2660         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2661         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2662                                                  * video_status_flags */
2663         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2664         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2665 };
2666
2667 static enum video_access_mode video_supported;
2668 static int video_orig_autosw;
2669
2670 static int video_autosw_get(void);
2671 static int video_autosw_set(int enable);
2672
2673 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
2674            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
2675            "\\_SB.PCI0.VID0",   /* 770e */
2676            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
2677            "\\_SB.PCI0.AGP.VID",        /* all others */
2678            );                           /* R30, R31 */
2679
2680 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2681
2682 static int __init video_init(struct ibm_init_struct *iibm)
2683 {
2684         int ivga;
2685
2686         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2687
2688         TPACPI_ACPIHANDLE_INIT(vid);
2689         TPACPI_ACPIHANDLE_INIT(vid2);
2690
2691         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2692                 /* G41, assume IVGA doesn't change */
2693                 vid_handle = vid2_handle;
2694
2695         if (!vid_handle)
2696                 /* video switching not supported on R30, R31 */
2697                 video_supported = TPACPI_VIDEO_NONE;
2698         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2699                 /* 570 */
2700                 video_supported = TPACPI_VIDEO_570;
2701         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2702                 /* 600e/x, 770e, 770x */
2703                 video_supported = TPACPI_VIDEO_770;
2704         else
2705                 /* all others */
2706                 video_supported = TPACPI_VIDEO_NEW;
2707
2708         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2709                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2710                 video_supported);
2711
2712         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2713 }
2714
2715 static void video_exit(void)
2716 {
2717         dbg_printk(TPACPI_DBG_EXIT,
2718                    "restoring original video autoswitch mode\n");
2719         if (video_autosw_set(video_orig_autosw))
2720                 printk(TPACPI_ERR "error while trying to restore original "
2721                         "video autoswitch mode\n");
2722 }
2723
2724 static int video_outputsw_get(void)
2725 {
2726         int status = 0;
2727         int i;
2728
2729         switch (video_supported) {
2730         case TPACPI_VIDEO_570:
2731                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2732                                  TP_ACPI_VIDEO_570_PHSCMD))
2733                         return -EIO;
2734                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2735                 break;
2736         case TPACPI_VIDEO_770:
2737                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2738                         return -EIO;
2739                 if (i)
2740                         status |= TP_ACPI_VIDEO_S_LCD;
2741                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2742                         return -EIO;
2743                 if (i)
2744                         status |= TP_ACPI_VIDEO_S_CRT;
2745                 break;
2746         case TPACPI_VIDEO_NEW:
2747                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
2748                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
2749                         return -EIO;
2750                 if (i)
2751                         status |= TP_ACPI_VIDEO_S_CRT;
2752
2753                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
2754                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
2755                         return -EIO;
2756                 if (i)
2757                         status |= TP_ACPI_VIDEO_S_LCD;
2758                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
2759                         return -EIO;
2760                 if (i)
2761                         status |= TP_ACPI_VIDEO_S_DVI;
2762                 break;
2763         default:
2764                 return -ENOSYS;
2765         }
2766
2767         return status;
2768 }
2769
2770 static int video_outputsw_set(int status)
2771 {
2772         int autosw;
2773         int res = 0;
2774
2775         switch (video_supported) {
2776         case TPACPI_VIDEO_570:
2777                 res = acpi_evalf(NULL, NULL,
2778                                  "\\_SB.PHS2", "vdd",
2779                                  TP_ACPI_VIDEO_570_PHS2CMD,
2780                                  status | TP_ACPI_VIDEO_570_PHS2SET);
2781                 break;
2782         case TPACPI_VIDEO_770:
2783                 autosw = video_autosw_get();
2784                 if (autosw < 0)
2785                         return autosw;
2786
2787                 res = video_autosw_set(1);
2788                 if (res)
2789                         return res;
2790                 res = acpi_evalf(vid_handle, NULL,
2791                                  "ASWT", "vdd", status * 0x100, 0);
2792                 if (!autosw && video_autosw_set(autosw)) {
2793                         printk(TPACPI_ERR
2794                                "video auto-switch left enabled due to error\n");
2795                         return -EIO;
2796                 }
2797                 break;
2798         case TPACPI_VIDEO_NEW:
2799                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
2800                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
2801                 break;
2802         default:
2803                 return -ENOSYS;
2804         }
2805
2806         return (res)? 0 : -EIO;
2807 }
2808
2809 static int video_autosw_get(void)
2810 {
2811         int autosw = 0;
2812
2813         switch (video_supported) {
2814         case TPACPI_VIDEO_570:
2815                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
2816                         return -EIO;
2817                 break;
2818         case TPACPI_VIDEO_770:
2819         case TPACPI_VIDEO_NEW:
2820                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
2821                         return -EIO;
2822                 break;
2823         default:
2824                 return -ENOSYS;
2825         }
2826
2827         return autosw & 1;
2828 }
2829
2830 static int video_autosw_set(int enable)
2831 {
2832         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
2833                 return -EIO;
2834         return 0;
2835 }
2836
2837 static int video_outputsw_cycle(void)
2838 {
2839         int autosw = video_autosw_get();
2840         int res;
2841
2842         if (autosw < 0)
2843                 return autosw;
2844
2845         switch (video_supported) {
2846         case TPACPI_VIDEO_570:
2847                 res = video_autosw_set(1);
2848                 if (res)
2849                         return res;
2850                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
2851                 break;
2852         case TPACPI_VIDEO_770:
2853         case TPACPI_VIDEO_NEW:
2854                 res = video_autosw_set(1);
2855                 if (res)
2856                         return res;
2857                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
2858                 break;
2859         default:
2860                 return -ENOSYS;
2861         }
2862         if (!autosw && video_autosw_set(autosw)) {
2863                 printk(TPACPI_ERR
2864                        "video auto-switch left enabled due to error\n");
2865                 return -EIO;
2866         }
2867
2868         return (res)? 0 : -EIO;
2869 }
2870
2871 static int video_expand_toggle(void)
2872 {
2873         switch (video_supported) {
2874         case TPACPI_VIDEO_570:
2875                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
2876                         0 : -EIO;
2877         case TPACPI_VIDEO_770:
2878                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
2879                         0 : -EIO;
2880         case TPACPI_VIDEO_NEW:
2881                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
2882                         0 : -EIO;
2883         default:
2884                 return -ENOSYS;
2885         }
2886         /* not reached */
2887 }
2888
2889 static int video_read(char *p)
2890 {
2891         int status, autosw;
2892         int len = 0;
2893
2894         if (video_supported == TPACPI_VIDEO_NONE) {
2895                 len += sprintf(p + len, "status:\t\tnot supported\n");
2896                 return len;
2897         }
2898
2899         status = video_outputsw_get();
2900         if (status < 0)
2901                 return status;
2902
2903         autosw = video_autosw_get();
2904         if (autosw < 0)
2905                 return autosw;
2906
2907         len += sprintf(p + len, "status:\t\tsupported\n");
2908         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
2909         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
2910         if (video_supported == TPACPI_VIDEO_NEW)
2911                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
2912         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
2913         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
2914         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
2915         if (video_supported == TPACPI_VIDEO_NEW)
2916                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
2917         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
2918         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
2919
2920         return len;
2921 }
2922
2923 static int video_write(char *buf)
2924 {
2925         char *cmd;
2926         int enable, disable, status;
2927         int res;
2928
2929         if (video_supported == TPACPI_VIDEO_NONE)
2930                 return -ENODEV;
2931
2932         enable = 0;
2933         disable = 0;
2934
2935         while ((cmd = next_cmd(&buf))) {
2936                 if (strlencmp(cmd, "lcd_enable") == 0) {
2937                         enable |= TP_ACPI_VIDEO_S_LCD;
2938                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
2939                         disable |= TP_ACPI_VIDEO_S_LCD;
2940                 } else if (strlencmp(cmd, "crt_enable") == 0) {
2941                         enable |= TP_ACPI_VIDEO_S_CRT;
2942                 } else if (strlencmp(cmd, "crt_disable") == 0) {
2943                         disable |= TP_ACPI_VIDEO_S_CRT;
2944                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2945                            strlencmp(cmd, "dvi_enable") == 0) {
2946                         enable |= TP_ACPI_VIDEO_S_DVI;
2947                 } else if (video_supported == TPACPI_VIDEO_NEW &&
2948                            strlencmp(cmd, "dvi_disable") == 0) {
2949                         disable |= TP_ACPI_VIDEO_S_DVI;
2950                 } else if (strlencmp(cmd, "auto_enable") == 0) {
2951                         res = video_autosw_set(1);
2952                         if (res)
2953                                 return res;
2954                 } else if (strlencmp(cmd, "auto_disable") == 0) {
2955                         res = video_autosw_set(0);
2956                         if (res)
2957                                 return res;
2958                 } else if (strlencmp(cmd, "video_switch") == 0) {
2959                         res = video_outputsw_cycle();
2960                         if (res)
2961                                 return res;
2962                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
2963                         res = video_expand_toggle();
2964                         if (res)
2965                                 return res;
2966                 } else
2967                         return -EINVAL;
2968         }
2969
2970         if (enable || disable) {
2971                 status = video_outputsw_get();
2972                 if (status < 0)
2973                         return status;
2974                 res = video_outputsw_set((status & ~disable) | enable);
2975                 if (res)
2976                         return res;
2977         }
2978
2979         return 0;
2980 }
2981
2982 static struct ibm_struct video_driver_data = {
2983         .name = "video",
2984         .read = video_read,
2985         .write = video_write,
2986         .exit = video_exit,
2987 };
2988
2989 /*************************************************************************
2990  * Light (thinklight) subdriver
2991  */
2992
2993 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
2994 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
2995
2996 static int __init light_init(struct ibm_init_struct *iibm)
2997 {
2998         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
2999
3000         TPACPI_ACPIHANDLE_INIT(ledb);
3001         TPACPI_ACPIHANDLE_INIT(lght);
3002         TPACPI_ACPIHANDLE_INIT(cmos);
3003
3004         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3005         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3006
3007         if (tp_features.light)
3008                 /* light status not supported on
3009                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3010                 tp_features.light_status =
3011                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3012
3013         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3014                 str_supported(tp_features.light));
3015
3016         return (tp_features.light)? 0 : 1;
3017 }
3018
3019 static int light_read(char *p)
3020 {
3021         int len = 0;
3022         int status = 0;
3023
3024         if (!tp_features.light) {
3025                 len += sprintf(p + len, "status:\t\tnot supported\n");
3026         } else if (!tp_features.light_status) {
3027                 len += sprintf(p + len, "status:\t\tunknown\n");
3028                 len += sprintf(p + len, "commands:\ton, off\n");
3029         } else {
3030                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3031                         return -EIO;
3032                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3033                 len += sprintf(p + len, "commands:\ton, off\n");
3034         }
3035
3036         return len;
3037 }
3038
3039 static int light_write(char *buf)
3040 {
3041         int cmos_cmd, lght_cmd;
3042         char *cmd;
3043         int success;
3044
3045         if (!tp_features.light)
3046                 return -ENODEV;
3047
3048         while ((cmd = next_cmd(&buf))) {
3049                 if (strlencmp(cmd, "on") == 0) {
3050                         cmos_cmd = 0x0c;
3051                         lght_cmd = 1;
3052                 } else if (strlencmp(cmd, "off") == 0) {
3053                         cmos_cmd = 0x0d;
3054                         lght_cmd = 0;
3055                 } else
3056                         return -EINVAL;
3057
3058                 success = cmos_handle ?
3059                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
3060                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
3061                 if (!success)
3062                         return -EIO;
3063         }
3064
3065         return 0;
3066 }
3067
3068 static struct ibm_struct light_driver_data = {
3069         .name = "light",
3070         .read = light_read,
3071         .write = light_write,
3072 };
3073
3074 /*************************************************************************
3075  * Dock subdriver
3076  */
3077
3078 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3079
3080 static void dock_notify(struct ibm_struct *ibm, u32 event);
3081 static int dock_read(char *p);
3082 static int dock_write(char *buf);
3083
3084 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3085            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3086            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3087            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3088     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3089
3090 /* don't list other alternatives as we install a notify handler on the 570 */
3091 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3092
3093 static const struct acpi_device_id ibm_pci_device_ids[] = {
3094         {PCI_ROOT_HID_STRING, 0},
3095         {"", 0},
3096 };
3097
3098 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3099         {
3100          .notify = dock_notify,
3101          .handle = &dock_handle,
3102          .type = ACPI_SYSTEM_NOTIFY,
3103         },
3104         {
3105         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3106          * We just use it to get notifications of dock hotplug
3107          * in very old thinkpads */
3108          .hid = ibm_pci_device_ids,
3109          .notify = dock_notify,
3110          .handle = &pci_handle,
3111          .type = ACPI_SYSTEM_NOTIFY,
3112         },
3113 };
3114
3115 static struct ibm_struct dock_driver_data[2] = {
3116         {
3117          .name = "dock",
3118          .read = dock_read,
3119          .write = dock_write,
3120          .acpi = &ibm_dock_acpidriver[0],
3121         },
3122         {
3123          .name = "dock",
3124          .acpi = &ibm_dock_acpidriver[1],
3125         },
3126 };
3127
3128 #define dock_docked() (_sta(dock_handle) & 1)
3129
3130 static int __init dock_init(struct ibm_init_struct *iibm)
3131 {
3132         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3133
3134         TPACPI_ACPIHANDLE_INIT(dock);
3135
3136         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3137                 str_supported(dock_handle != NULL));
3138
3139         return (dock_handle)? 0 : 1;
3140 }
3141
3142 static int __init dock_init2(struct ibm_init_struct *iibm)
3143 {
3144         int dock2_needed;
3145
3146         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3147
3148         if (dock_driver_data[0].flags.acpi_driver_registered &&
3149             dock_driver_data[0].flags.acpi_notify_installed) {
3150                 TPACPI_ACPIHANDLE_INIT(pci);
3151                 dock2_needed = (pci_handle != NULL);
3152                 vdbg_printk(TPACPI_DBG_INIT,
3153                             "dock PCI handler for the TP 570 is %s\n",
3154                             str_supported(dock2_needed));
3155         } else {
3156                 vdbg_printk(TPACPI_DBG_INIT,
3157                 "dock subdriver part 2 not required\n");
3158                 dock2_needed = 0;
3159         }
3160
3161         return (dock2_needed)? 0 : 1;
3162 }
3163
3164 static void dock_notify(struct ibm_struct *ibm, u32 event)
3165 {
3166         int docked = dock_docked();
3167         int pci = ibm->acpi->hid && ibm->acpi->device &&
3168                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3169         int data;
3170
3171         if (event == 1 && !pci) /* 570 */
3172                 data = 1;       /* button */
3173         else if (event == 1 && pci)     /* 570 */
3174                 data = 3;       /* dock */
3175         else if (event == 3 && docked)
3176                 data = 1;       /* button */
3177         else if (event == 3 && !docked)
3178                 data = 2;       /* undock */
3179         else if (event == 0 && docked)
3180                 data = 3;       /* dock */
3181         else {
3182                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3183                        event, _sta(dock_handle));
3184                 data = 0;       /* unknown */
3185         }
3186         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3187         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3188                                           ibm->acpi->device->dev.bus_id,
3189                                           event, data);
3190 }
3191
3192 static int dock_read(char *p)
3193 {
3194         int len = 0;
3195         int docked = dock_docked();
3196
3197         if (!dock_handle)
3198                 len += sprintf(p + len, "status:\t\tnot supported\n");
3199         else if (!docked)
3200                 len += sprintf(p + len, "status:\t\tundocked\n");
3201         else {
3202                 len += sprintf(p + len, "status:\t\tdocked\n");
3203                 len += sprintf(p + len, "commands:\tdock, undock\n");
3204         }
3205
3206         return len;
3207 }
3208
3209 static int dock_write(char *buf)
3210 {
3211         char *cmd;
3212
3213         if (!dock_docked())
3214                 return -ENODEV;
3215
3216         while ((cmd = next_cmd(&buf))) {
3217                 if (strlencmp(cmd, "undock") == 0) {
3218                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3219                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3220                                 return -EIO;
3221                 } else if (strlencmp(cmd, "dock") == 0) {
3222                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3223                                 return -EIO;
3224                 } else
3225                         return -EINVAL;
3226         }
3227
3228         return 0;
3229 }
3230
3231 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3232
3233 /*************************************************************************
3234  * Bay subdriver
3235  */
3236
3237 #ifdef CONFIG_THINKPAD_ACPI_BAY
3238
3239 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3240            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3241            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3242            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3243            );                           /* A21e, R30, R31 */
3244 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3245            "_EJ0",              /* all others */
3246            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3247 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3248            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3249            );                           /* all others */
3250 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3251            "_EJ0",                      /* 770x */
3252            );                           /* all others */
3253
3254 static int __init bay_init(struct ibm_init_struct *iibm)
3255 {
3256         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3257
3258         TPACPI_ACPIHANDLE_INIT(bay);
3259         if (bay_handle)
3260                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3261         TPACPI_ACPIHANDLE_INIT(bay2);
3262         if (bay2_handle)
3263                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3264
3265         tp_features.bay_status = bay_handle &&
3266                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3267         tp_features.bay_status2 = bay2_handle &&
3268                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3269
3270         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3271                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3272         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3273                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3274
3275         vdbg_printk(TPACPI_DBG_INIT,
3276                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3277                 str_supported(tp_features.bay_status),
3278                 str_supported(tp_features.bay_eject),
3279                 str_supported(tp_features.bay_status2),
3280                 str_supported(tp_features.bay_eject2));
3281
3282         return (tp_features.bay_status || tp_features.bay_eject ||
3283                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3284 }
3285
3286 static void bay_notify(struct ibm_struct *ibm, u32 event)
3287 {
3288         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3289         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3290                                           ibm->acpi->device->dev.bus_id,
3291                                           event, 0);
3292 }
3293
3294 #define bay_occupied(b) (_sta(b##_handle) & 1)
3295
3296 static int bay_read(char *p)
3297 {
3298         int len = 0;
3299         int occupied = bay_occupied(bay);
3300         int occupied2 = bay_occupied(bay2);
3301         int eject, eject2;
3302
3303         len += sprintf(p + len, "status:\t\t%s\n",
3304                 tp_features.bay_status ?
3305                         (occupied ? "occupied" : "unoccupied") :
3306                                 "not supported");
3307         if (tp_features.bay_status2)
3308                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3309                                "occupied" : "unoccupied");
3310
3311         eject = tp_features.bay_eject && occupied;
3312         eject2 = tp_features.bay_eject2 && occupied2;
3313
3314         if (eject && eject2)
3315                 len += sprintf(p + len, "commands:\teject, eject2\n");
3316         else if (eject)
3317                 len += sprintf(p + len, "commands:\teject\n");
3318         else if (eject2)
3319                 len += sprintf(p + len, "commands:\teject2\n");
3320
3321         return len;
3322 }
3323
3324 static int bay_write(char *buf)
3325 {
3326         char *cmd;
3327
3328         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3329                 return -ENODEV;
3330
3331         while ((cmd = next_cmd(&buf))) {
3332                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3333                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3334                                 return -EIO;
3335                 } else if (tp_features.bay_eject2 &&
3336                            strlencmp(cmd, "eject2") == 0) {
3337                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3338                                 return -EIO;
3339                 } else
3340                         return -EINVAL;
3341         }
3342
3343         return 0;
3344 }
3345
3346 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3347         .notify = bay_notify,
3348         .handle = &bay_handle,
3349         .type = ACPI_SYSTEM_NOTIFY,
3350 };
3351
3352 static struct ibm_struct bay_driver_data = {
3353         .name = "bay",
3354         .read = bay_read,
3355         .write = bay_write,
3356         .acpi = &ibm_bay_acpidriver,
3357 };
3358
3359 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3360
3361 /*************************************************************************
3362  * CMOS subdriver
3363  */
3364
3365 /* sysfs cmos_command -------------------------------------------------- */
3366 static ssize_t cmos_command_store(struct device *dev,
3367                             struct device_attribute *attr,
3368                             const char *buf, size_t count)
3369 {
3370         unsigned long cmos_cmd;
3371         int res;
3372
3373         if (parse_strtoul(buf, 21, &cmos_cmd))
3374                 return -EINVAL;
3375
3376         res = issue_thinkpad_cmos_command(cmos_cmd);
3377         return (res)? res : count;
3378 }
3379
3380 static struct device_attribute dev_attr_cmos_command =
3381         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3382
3383 /* --------------------------------------------------------------------- */
3384
3385 static int __init cmos_init(struct ibm_init_struct *iibm)
3386 {
3387         int res;
3388
3389         vdbg_printk(TPACPI_DBG_INIT,
3390                 "initializing cmos commands subdriver\n");
3391
3392         TPACPI_ACPIHANDLE_INIT(cmos);
3393
3394         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3395                 str_supported(cmos_handle != NULL));
3396
3397         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3398         if (res)
3399                 return res;
3400
3401         return (cmos_handle)? 0 : 1;
3402 }
3403
3404 static void cmos_exit(void)
3405 {
3406         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3407 }
3408
3409 static int cmos_read(char *p)
3410 {
3411         int len = 0;
3412
3413         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3414            R30, R31, T20-22, X20-21 */
3415         if (!cmos_handle)
3416                 len += sprintf(p + len, "status:\t\tnot supported\n");
3417         else {
3418                 len += sprintf(p + len, "status:\t\tsupported\n");
3419                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3420         }
3421
3422         return len;
3423 }
3424
3425 static int cmos_write(char *buf)
3426 {
3427         char *cmd;
3428         int cmos_cmd, res;
3429
3430         while ((cmd = next_cmd(&buf))) {
3431                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3432                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3433                         /* cmos_cmd set */
3434                 } else
3435                         return -EINVAL;
3436
3437                 res = issue_thinkpad_cmos_command(cmos_cmd);
3438                 if (res)
3439                         return res;
3440         }
3441
3442         return 0;
3443 }
3444
3445 static struct ibm_struct cmos_driver_data = {
3446         .name = "cmos",
3447         .read = cmos_read,
3448         .write = cmos_write,
3449         .exit = cmos_exit,
3450 };
3451
3452 /*************************************************************************
3453  * LED subdriver
3454  */
3455
3456 enum led_access_mode {
3457         TPACPI_LED_NONE = 0,
3458         TPACPI_LED_570, /* 570 */
3459         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3460         TPACPI_LED_NEW, /* all others */
3461 };
3462
3463 enum {  /* For TPACPI_LED_OLD */
3464         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3465         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3466         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3467 };
3468
3469 static enum led_access_mode led_supported;
3470
3471 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3472            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3473                                 /* T20-22, X20-21 */
3474            "LED",               /* all others */
3475            );                   /* R30, R31 */
3476
3477 static int __init led_init(struct ibm_init_struct *iibm)
3478 {
3479         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3480
3481         TPACPI_ACPIHANDLE_INIT(led);
3482
3483         if (!led_handle)
3484                 /* led not supported on R30, R31 */
3485                 led_supported = TPACPI_LED_NONE;
3486         else if (strlencmp(led_path, "SLED") == 0)
3487                 /* 570 */
3488                 led_supported = TPACPI_LED_570;
3489         else if (strlencmp(led_path, "SYSL") == 0)
3490                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3491                 led_supported = TPACPI_LED_OLD;
3492         else
3493                 /* all others */
3494                 led_supported = TPACPI_LED_NEW;
3495
3496         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3497                 str_supported(led_supported), led_supported);
3498
3499         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3500 }
3501
3502 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
3503
3504 static int led_read(char *p)
3505 {
3506         int len = 0;
3507
3508         if (!led_supported) {
3509                 len += sprintf(p + len, "status:\t\tnot supported\n");
3510                 return len;
3511         }
3512         len += sprintf(p + len, "status:\t\tsupported\n");
3513
3514         if (led_supported == TPACPI_LED_570) {
3515                 /* 570 */
3516                 int i, status;
3517                 for (i = 0; i < 8; i++) {
3518                         if (!acpi_evalf(ec_handle,
3519                                         &status, "GLED", "dd", 1 << i))
3520                                 return -EIO;
3521                         len += sprintf(p + len, "%d:\t\t%s\n",
3522                                        i, led_status(status));
3523                 }
3524         }
3525
3526         len += sprintf(p + len, "commands:\t"
3527                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3528
3529         return len;
3530 }
3531
3532 /* off, on, blink */
3533 static const int led_sled_arg1[] = { 0, 1, 3 };
3534 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
3535 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
3536 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
3537
3538 static int led_write(char *buf)
3539 {
3540         char *cmd;
3541         int led, ind, ret;
3542
3543         if (!led_supported)
3544                 return -ENODEV;
3545
3546         while ((cmd = next_cmd(&buf))) {
3547                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3548                         return -EINVAL;
3549
3550                 if (strstr(cmd, "off")) {
3551                         ind = 0;
3552                 } else if (strstr(cmd, "on")) {
3553                         ind = 1;
3554                 } else if (strstr(cmd, "blink")) {
3555                         ind = 2;
3556                 } else
3557                         return -EINVAL;
3558
3559                 if (led_supported == TPACPI_LED_570) {
3560                         /* 570 */
3561                         led = 1 << led;
3562                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3563                                         led, led_sled_arg1[ind]))
3564                                 return -EIO;
3565                 } else if (led_supported == TPACPI_LED_OLD) {
3566                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3567                         led = 1 << led;
3568                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
3569                         if (ret >= 0)
3570                                 ret = ec_write(TPACPI_LED_EC_HLBL,
3571                                                 led * led_exp_hlbl[ind]);
3572                         if (ret >= 0)
3573                                 ret = ec_write(TPACPI_LED_EC_HLCL,
3574                                                 led * led_exp_hlcl[ind]);
3575                         if (ret < 0)
3576                                 return ret;
3577                 } else {
3578                         /* all others */
3579                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3580                                         led, led_led_arg1[ind]))
3581                                 return -EIO;
3582                 }
3583         }
3584
3585         return 0;
3586 }
3587
3588 static struct ibm_struct led_driver_data = {
3589         .name = "led",
3590         .read = led_read,
3591         .write = led_write,
3592 };
3593
3594 /*************************************************************************
3595  * Beep subdriver
3596  */
3597
3598 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
3599
3600 static int __init beep_init(struct ibm_init_struct *iibm)
3601 {
3602         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3603
3604         TPACPI_ACPIHANDLE_INIT(beep);
3605
3606         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3607                 str_supported(beep_handle != NULL));
3608
3609         return (beep_handle)? 0 : 1;
3610 }
3611
3612 static int beep_read(char *p)
3613 {
3614         int len = 0;
3615
3616         if (!beep_handle)
3617                 len += sprintf(p + len, "status:\t\tnot supported\n");
3618         else {
3619                 len += sprintf(p + len, "status:\t\tsupported\n");
3620                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3621         }
3622
3623         return len;
3624 }
3625
3626 static int beep_write(char *buf)
3627 {
3628         char *cmd;
3629         int beep_cmd;
3630
3631         if (!beep_handle)
3632                 return -ENODEV;
3633
3634         while ((cmd = next_cmd(&buf))) {
3635                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3636                     beep_cmd >= 0 && beep_cmd <= 17) {
3637                         /* beep_cmd set */
3638                 } else
3639                         return -EINVAL;
3640                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3641                         return -EIO;
3642         }
3643
3644         return 0;
3645 }
3646
3647 static struct ibm_struct beep_driver_data = {
3648         .name = "beep",
3649         .read = beep_read,
3650         .write = beep_write,
3651 };
3652
3653 /*************************************************************************
3654  * Thermal subdriver
3655  */
3656
3657 enum thermal_access_mode {
3658         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
3659         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
3660         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
3661         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
3662         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
3663 };
3664
3665 enum { /* TPACPI_THERMAL_TPEC_* */
3666         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
3667         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
3668         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
3669 };
3670
3671 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
3672 struct ibm_thermal_sensors_struct {
3673         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
3674 };
3675
3676 static enum thermal_access_mode thermal_read_mode;
3677
3678 /* idx is zero-based */
3679 static int thermal_get_sensor(int idx, s32 *value)
3680 {
3681         int t;
3682         s8 tmp;
3683         char tmpi[5];
3684
3685         t = TP_EC_THERMAL_TMP0;
3686
3687         switch (thermal_read_mode) {
3688 #if TPACPI_MAX_THERMAL_SENSORS >= 16
3689         case TPACPI_THERMAL_TPEC_16:
3690                 if (idx >= 8 && idx <= 15) {
3691                         t = TP_EC_THERMAL_TMP8;
3692                         idx -= 8;
3693                 }
3694                 /* fallthrough */
3695 #endif
3696         case TPACPI_THERMAL_TPEC_8:
3697                 if (idx <= 7) {
3698                         if (!acpi_ec_read(t + idx, &tmp))
3699                                 return -EIO;
3700                         *value = tmp * 1000;
3701                         return 0;
3702                 }
3703                 break;
3704
3705         case TPACPI_THERMAL_ACPI_UPDT:
3706                 if (idx <= 7) {
3707                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3708                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
3709                                 return -EIO;
3710                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3711                                 return -EIO;
3712                         *value = (t - 2732) * 100;
3713                         return 0;
3714                 }
3715                 break;
3716
3717         case TPACPI_THERMAL_ACPI_TMP07:
3718                 if (idx <= 7) {
3719                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3720                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3721                                 return -EIO;
3722                         if (t > 127 || t < -127)
3723                                 t = TP_EC_THERMAL_TMP_NA;
3724                         *value = t * 1000;
3725                         return 0;
3726                 }
3727                 break;
3728
3729         case TPACPI_THERMAL_NONE:
3730         default:
3731                 return -ENOSYS;
3732         }
3733
3734         return -EINVAL;
3735 }
3736
3737 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
3738 {
3739         int res, i;
3740         int n;
3741
3742         n = 8;
3743         i = 0;
3744
3745         if (!s)
3746                 return -EINVAL;
3747
3748         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
3749                 n = 16;
3750
3751         for (i = 0 ; i < n; i++) {
3752                 res = thermal_get_sensor(i, &s->temp[i]);
3753                 if (res)
3754                         return res;
3755         }
3756
3757         return n;
3758 }
3759
3760 /* sysfs temp##_input -------------------------------------------------- */
3761
3762 static ssize_t thermal_temp_input_show(struct device *dev,
3763                            struct device_attribute *attr,
3764                            char *buf)
3765 {
3766         struct sensor_device_attribute *sensor_attr =
3767                                         to_sensor_dev_attr(attr);
3768         int idx = sensor_attr->index;
3769         s32 value;
3770         int res;
3771
3772         res = thermal_get_sensor(idx, &value);
3773         if (res)
3774                 return res;
3775         if (value == TP_EC_THERMAL_TMP_NA * 1000)
3776                 return -ENXIO;
3777
3778         return snprintf(buf, PAGE_SIZE, "%d\n", value);
3779 }
3780
3781 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
3782          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
3783                      thermal_temp_input_show, NULL, _idxB)
3784
3785 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
3786         THERMAL_SENSOR_ATTR_TEMP(1, 0),
3787         THERMAL_SENSOR_ATTR_TEMP(2, 1),
3788         THERMAL_SENSOR_ATTR_TEMP(3, 2),
3789         THERMAL_SENSOR_ATTR_TEMP(4, 3),
3790         THERMAL_SENSOR_ATTR_TEMP(5, 4),
3791         THERMAL_SENSOR_ATTR_TEMP(6, 5),
3792         THERMAL_SENSOR_ATTR_TEMP(7, 6),
3793         THERMAL_SENSOR_ATTR_TEMP(8, 7),
3794         THERMAL_SENSOR_ATTR_TEMP(9, 8),
3795         THERMAL_SENSOR_ATTR_TEMP(10, 9),
3796         THERMAL_SENSOR_ATTR_TEMP(11, 10),
3797         THERMAL_SENSOR_ATTR_TEMP(12, 11),
3798         THERMAL_SENSOR_ATTR_TEMP(13, 12),
3799         THERMAL_SENSOR_ATTR_TEMP(14, 13),
3800         THERMAL_SENSOR_ATTR_TEMP(15, 14),
3801         THERMAL_SENSOR_ATTR_TEMP(16, 15),
3802 };
3803
3804 #define THERMAL_ATTRS(X) \
3805         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
3806
3807 static struct attribute *thermal_temp_input_attr[] = {
3808         THERMAL_ATTRS(8),
3809         THERMAL_ATTRS(9),
3810         THERMAL_ATTRS(10),
3811         THERMAL_ATTRS(11),
3812         THERMAL_ATTRS(12),
3813         THERMAL_ATTRS(13),
3814         THERMAL_ATTRS(14),
3815         THERMAL_ATTRS(15),
3816         THERMAL_ATTRS(0),
3817         THERMAL_ATTRS(1),
3818         THERMAL_ATTRS(2),
3819         THERMAL_ATTRS(3),
3820         THERMAL_ATTRS(4),
3821         THERMAL_ATTRS(5),
3822         THERMAL_ATTRS(6),
3823         THERMAL_ATTRS(7),
3824         NULL
3825 };
3826
3827 static const struct attribute_group thermal_temp_input16_group = {
3828         .attrs = thermal_temp_input_attr
3829 };
3830
3831 static const struct attribute_group thermal_temp_input8_group = {
3832         .attrs = &thermal_temp_input_attr[8]
3833 };
3834
3835 #undef THERMAL_SENSOR_ATTR_TEMP
3836 #undef THERMAL_ATTRS
3837
3838 /* --------------------------------------------------------------------- */
3839
3840 static int __init thermal_init(struct ibm_init_struct *iibm)
3841 {
3842         u8 t, ta1, ta2;
3843         int i;
3844         int acpi_tmp7;
3845         int res;
3846
3847         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
3848
3849         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
3850
3851         if (thinkpad_id.ec_model) {
3852                 /*
3853                  * Direct EC access mode: sensors at registers
3854                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
3855                  * non-implemented, thermal sensors return 0x80 when
3856                  * not available
3857                  */
3858
3859                 ta1 = ta2 = 0;
3860                 for (i = 0; i < 8; i++) {
3861                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
3862                                 ta1 |= t;
3863                         } else {
3864                                 ta1 = 0;
3865                                 break;
3866                         }
3867                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
3868                                 ta2 |= t;
3869                         } else {
3870                                 ta1 = 0;
3871                                 break;
3872                         }
3873                 }
3874                 if (ta1 == 0) {
3875                         /* This is sheer paranoia, but we handle it anyway */
3876                         if (acpi_tmp7) {
3877                                 printk(TPACPI_ERR
3878                                        "ThinkPad ACPI EC access misbehaving, "
3879                                        "falling back to ACPI TMPx access "
3880                                        "mode\n");
3881                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3882                         } else {
3883                                 printk(TPACPI_ERR
3884                                        "ThinkPad ACPI EC access misbehaving, "
3885                                        "disabling thermal sensors access\n");
3886                                 thermal_read_mode = TPACPI_THERMAL_NONE;
3887                         }
3888                 } else {
3889                         thermal_read_mode =
3890                             (ta2 != 0) ?
3891                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
3892                 }
3893         } else if (acpi_tmp7) {
3894                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
3895                         /* 600e/x, 770e, 770x */
3896                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
3897                 } else {
3898                         /* Standard ACPI TMPx access, max 8 sensors */
3899                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3900                 }
3901         } else {
3902                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
3903                 thermal_read_mode = TPACPI_THERMAL_NONE;
3904         }
3905
3906         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
3907                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
3908                 thermal_read_mode);
3909
3910         switch (thermal_read_mode) {
3911         case TPACPI_THERMAL_TPEC_16:
3912                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
3913                                 &thermal_temp_input16_group);
3914                 if (res)
3915                         return res;
3916                 break;
3917         case TPACPI_THERMAL_TPEC_8:
3918         case TPACPI_THERMAL_ACPI_TMP07:
3919         case TPACPI_THERMAL_ACPI_UPDT:
3920                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
3921                                 &thermal_temp_input8_group);
3922                 if (res)
3923                         return res;
3924                 break;
3925         case TPACPI_THERMAL_NONE:
3926         default:
3927                 return 1;
3928         }
3929
3930         return 0;
3931 }
3932
3933 static void thermal_exit(void)
3934 {
3935         switch (thermal_read_mode) {
3936         case TPACPI_THERMAL_TPEC_16:
3937                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
3938                                    &thermal_temp_input16_group);
3939                 break;
3940         case TPACPI_THERMAL_TPEC_8:
3941         case TPACPI_THERMAL_ACPI_TMP07:
3942         case TPACPI_THERMAL_ACPI_UPDT:
3943                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
3944                                    &thermal_temp_input16_group);
3945                 break;
3946         case TPACPI_THERMAL_NONE:
3947         default:
3948                 break;
3949         }
3950 }
3951
3952 static int thermal_read(char *p)
3953 {
3954         int len = 0;
3955         int n, i;
3956         struct ibm_thermal_sensors_struct t;
3957
3958         n = thermal_get_sensors(&t);
3959         if (unlikely(n < 0))
3960                 return n;
3961
3962         len += sprintf(p + len, "temperatures:\t");
3963
3964         if (n > 0) {
3965                 for (i = 0; i < (n - 1); i++)
3966                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
3967                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
3968         } else
3969                 len += sprintf(p + len, "not supported\n");
3970
3971         return len;
3972 }
3973
3974 static struct ibm_struct thermal_driver_data = {
3975         .name = "thermal",
3976         .read = thermal_read,
3977         .exit = thermal_exit,
3978 };
3979
3980 /*************************************************************************
3981  * EC Dump subdriver
3982  */
3983
3984 static u8 ecdump_regs[256];
3985
3986 static int ecdump_read(char *p)
3987 {
3988         int len = 0;
3989         int i, j;
3990         u8 v;
3991
3992         len += sprintf(p + len, "EC      "
3993                        " +00 +01 +02 +03 +04 +05 +06 +07"
3994                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
3995         for (i = 0; i < 256; i += 16) {
3996                 len += sprintf(p + len, "EC 0x%02x:", i);
3997                 for (j = 0; j < 16; j++) {
3998                         if (!acpi_ec_read(i + j, &v))
3999                                 break;
4000                         if (v != ecdump_regs[i + j])
4001                                 len += sprintf(p + len, " *%02x", v);
4002                         else
4003                                 len += sprintf(p + len, "  %02x", v);
4004                         ecdump_regs[i + j] = v;
4005                 }
4006                 len += sprintf(p + len, "\n");
4007                 if (j != 16)
4008                         break;
4009         }
4010
4011         /* These are way too dangerous to advertise openly... */
4012 #if 0
4013         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4014                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4015         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4016                        " (<offset> is 00-ff, <value> is 0-255)\n");
4017 #endif
4018         return len;
4019 }
4020
4021 static int ecdump_write(char *buf)
4022 {
4023         char *cmd;
4024         int i, v;
4025
4026         while ((cmd = next_cmd(&buf))) {
4027                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4028                         /* i and v set */
4029                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4030                         /* i and v set */
4031                 } else
4032                         return -EINVAL;
4033                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4034                         if (!acpi_ec_write(i, v))
4035                                 return -EIO;
4036                 } else
4037                         return -EINVAL;
4038         }
4039
4040         return 0;
4041 }
4042
4043 static struct ibm_struct ecdump_driver_data = {
4044         .name = "ecdump",
4045         .read = ecdump_read,
4046         .write = ecdump_write,
4047         .flags.experimental = 1,
4048 };
4049
4050 /*************************************************************************
4051  * Backlight/brightness subdriver
4052  */
4053
4054 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4055
4056 static struct backlight_device *ibm_backlight_device;
4057 static int brightness_offset = 0x31;
4058 static int brightness_mode;
4059 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4060
4061 static struct mutex brightness_mutex;
4062
4063 /*
4064  * ThinkPads can read brightness from two places: EC 0x31, or
4065  * CMOS NVRAM byte 0x5E, bits 0-3.
4066  */
4067 static int brightness_get(struct backlight_device *bd)
4068 {
4069         u8 lec = 0, lcmos = 0, level = 0;
4070
4071         if (brightness_mode & 1) {
4072                 if (!acpi_ec_read(brightness_offset, &lec))
4073                         return -EIO;
4074                 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
4075                 level = lec;
4076         };
4077         if (brightness_mode & 2) {
4078                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4079                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4080                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4081                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4082                 level = lcmos;
4083         }
4084
4085         if (brightness_mode == 3 && lec != lcmos) {
4086                 printk(TPACPI_ERR
4087                         "CMOS NVRAM (%u) and EC (%u) do not agree "
4088                         "on display brightness level\n",
4089                         (unsigned int) lcmos,
4090                         (unsigned int) lec);
4091                 return -EIO;
4092         }
4093
4094         return level;
4095 }
4096
4097 /* May return EINTR which can always be mapped to ERESTARTSYS */
4098 static int brightness_set(int value)
4099 {
4100         int cmos_cmd, inc, i, res;
4101         int current_value;
4102
4103         if (value > ((tp_features.bright_16levels)? 15 : 7))
4104                 return -EINVAL;
4105
4106         res = mutex_lock_interruptible(&brightness_mutex);
4107         if (res < 0)
4108                 return res;
4109
4110         current_value = brightness_get(NULL);
4111         if (current_value < 0) {
4112                 res = current_value;
4113                 goto errout;
4114         }
4115
4116         cmos_cmd = value > current_value ?
4117                         TP_CMOS_BRIGHTNESS_UP :
4118                         TP_CMOS_BRIGHTNESS_DOWN;
4119         inc = (value > current_value)? 1 : -1;
4120
4121         res = 0;
4122         for (i = current_value; i != value; i += inc) {
4123                 if ((brightness_mode & 2) &&
4124                     issue_thinkpad_cmos_command(cmos_cmd)) {
4125                         res = -EIO;
4126                         goto errout;
4127                 }
4128                 if ((brightness_mode & 1) &&
4129                     !acpi_ec_write(brightness_offset, i + inc)) {
4130                         res = -EIO;
4131                         goto errout;;
4132                 }
4133         }
4134
4135 errout:
4136         mutex_unlock(&brightness_mutex);
4137         return res;
4138 }
4139
4140 /* sysfs backlight class ----------------------------------------------- */
4141
4142 static int brightness_update_status(struct backlight_device *bd)
4143 {
4144         /* it is the backlight class's job (caller) to handle
4145          * EINTR and other errors properly */
4146         return brightness_set(
4147                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4148                  bd->props.power == FB_BLANK_UNBLANK) ?
4149                                 bd->props.brightness : 0);
4150 }
4151
4152 static struct backlight_ops ibm_backlight_data = {
4153         .get_brightness = brightness_get,
4154         .update_status  = brightness_update_status,
4155 };
4156
4157 /* --------------------------------------------------------------------- */
4158
4159 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
4160 {
4161         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
4162         union acpi_object *obj;
4163         int rc;
4164
4165         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
4166                 obj = (union acpi_object *)buffer.pointer;
4167                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
4168                         printk(TPACPI_ERR "Unknown BCLL data, "
4169                                "please report this to %s\n", TPACPI_MAIL);
4170                         rc = 0;
4171                 } else {
4172                         rc = obj->package.count;
4173                 }
4174         } else {
4175                 return 0;
4176         }
4177
4178         kfree(buffer.pointer);
4179         return rc;
4180 }
4181
4182 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
4183                                         void *context, void **rv)
4184 {
4185         char name[ACPI_PATH_SEGMENT_LENGTH];
4186         struct acpi_buffer buffer = { sizeof(name), &name };
4187
4188         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4189             !strncmp("BCLL", name, sizeof(name) - 1)) {
4190                 if (tpacpi_query_bcll_levels(handle) == 16) {
4191                         *rv = handle;
4192                         return AE_CTRL_TERMINATE;
4193                 } else {
4194                         return AE_OK;
4195                 }
4196         } else {
4197                 return AE_OK;
4198         }
4199 }
4200
4201 static int __init brightness_check_levels(void)
4202 {
4203         int status;
4204         void *found_node = NULL;
4205
4206         if (!vid_handle) {
4207                 TPACPI_ACPIHANDLE_INIT(vid);
4208         }
4209         if (!vid_handle)
4210                 return 0;
4211
4212         /* Search for a BCLL package with 16 levels */
4213         status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
4214                                         brightness_find_bcll, NULL,
4215                                         &found_node);
4216
4217         return (ACPI_SUCCESS(status) && found_node != NULL);
4218 }
4219
4220 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
4221                                         void *context, void **rv)
4222 {
4223         char name[ACPI_PATH_SEGMENT_LENGTH];
4224         struct acpi_buffer buffer = { sizeof(name), &name };
4225
4226         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4227             !strncmp("_BCL", name, sizeof(name) - 1)) {
4228                 *rv = handle;
4229                 return AE_CTRL_TERMINATE;
4230         } else {
4231                 return AE_OK;
4232         }
4233 }
4234
4235 static int __init brightness_check_std_acpi_support(void)
4236 {
4237         int status;
4238         void *found_node = NULL;
4239
4240         if (!vid_handle) {
4241                 TPACPI_ACPIHANDLE_INIT(vid);
4242         }
4243         if (!vid_handle)
4244                 return 0;
4245
4246         /* Search for a _BCL method, but don't execute it */
4247         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
4248                                      brightness_find_bcl, NULL, &found_node);
4249
4250         return (ACPI_SUCCESS(status) && found_node != NULL);
4251 }
4252
4253 static int __init brightness_init(struct ibm_init_struct *iibm)
4254 {
4255         int b;
4256
4257         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4258
4259         mutex_init(&brightness_mutex);
4260
4261         if (!brightness_enable) {
4262                 dbg_printk(TPACPI_DBG_INIT,
4263                            "brightness support disabled by "
4264                            "module parameter\n");
4265                 return 1;
4266         } else if (brightness_enable > 1) {
4267                 if (brightness_check_std_acpi_support()) {
4268                         printk(TPACPI_NOTICE
4269                                "standard ACPI backlight interface "
4270                                "available, not loading native one...\n");
4271                         return 1;
4272                 }
4273         }
4274
4275         if (!brightness_mode) {
4276                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4277                         brightness_mode = 2;
4278                 else
4279                         brightness_mode = 3;
4280
4281                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4282                         brightness_mode);
4283         }
4284
4285         if (brightness_mode > 3)
4286                 return -EINVAL;
4287
4288         tp_features.bright_16levels =
4289                         thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
4290                         brightness_check_levels();
4291
4292         b = brightness_get(NULL);
4293         if (b < 0)
4294                 return 1;
4295
4296         if (tp_features.bright_16levels)
4297                 printk(TPACPI_INFO
4298                        "detected a 16-level brightness capable ThinkPad\n");
4299
4300         ibm_backlight_device = backlight_device_register(
4301                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4302                                         &ibm_backlight_data);
4303         if (IS_ERR(ibm_backlight_device)) {
4304                 printk(TPACPI_ERR "Could not register backlight device\n");
4305                 return PTR_ERR(ibm_backlight_device);
4306         }
4307         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4308
4309         ibm_backlight_device->props.max_brightness =
4310                                 (tp_features.bright_16levels)? 15 : 7;
4311         ibm_backlight_device->props.brightness = b;
4312         backlight_update_status(ibm_backlight_device);
4313
4314         return 0;
4315 }
4316
4317 static void brightness_exit(void)
4318 {
4319         if (ibm_backlight_device) {
4320                 vdbg_printk(TPACPI_DBG_EXIT,
4321                             "calling backlight_device_unregister()\n");
4322                 backlight_device_unregister(ibm_backlight_device);
4323                 ibm_backlight_device = NULL;
4324         }
4325 }
4326
4327 static int brightness_read(char *p)
4328 {
4329         int len = 0;
4330         int level;
4331
4332         level = brightness_get(NULL);
4333         if (level < 0) {
4334                 len += sprintf(p + len, "level:\t\tunreadable\n");
4335         } else {
4336                 len += sprintf(p + len, "level:\t\t%d\n", level);
4337                 len += sprintf(p + len, "commands:\tup, down\n");
4338                 len += sprintf(p + len, "commands:\tlevel <level>"
4339                                " (<level> is 0-%d)\n",
4340                                (tp_features.bright_16levels) ? 15 : 7);
4341         }
4342
4343         return len;
4344 }
4345
4346 static int brightness_write(char *buf)
4347 {
4348         int level;
4349         int rc;
4350         char *cmd;
4351         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4352
4353         level = brightness_get(NULL);
4354         if (level < 0)
4355                 return level;
4356
4357         while ((cmd = next_cmd(&buf))) {
4358                 if (strlencmp(cmd, "up") == 0) {
4359                         if (level < max_level)
4360                                 level++;
4361                 } else if (strlencmp(cmd, "down") == 0) {
4362                         if (level > 0)
4363                                 level--;
4364                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4365                            level >= 0 && level <= max_level) {
4366                         /* new level set */
4367                 } else
4368                         return -EINVAL;
4369         }
4370
4371         /*
4372          * Now we know what the final level should be, so we try to set it.
4373          * Doing it this way makes the syscall restartable in case of EINTR
4374          */
4375         rc = brightness_set(level);
4376         return (rc == -EINTR)? ERESTARTSYS : rc;
4377 }
4378
4379 static struct ibm_struct brightness_driver_data = {
4380         .name = "brightness",
4381         .read = brightness_read,
4382         .write = brightness_write,
4383         .exit = brightness_exit,
4384 };
4385
4386 /*************************************************************************
4387  * Volume subdriver
4388  */
4389
4390 static int volume_offset = 0x30;
4391
4392 static int volume_read(char *p)
4393 {
4394         int len = 0;
4395         u8 level;
4396
4397         if (!acpi_ec_read(volume_offset, &level)) {
4398                 len += sprintf(p + len, "level:\t\tunreadable\n");
4399         } else {
4400                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4401                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4402                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4403                 len += sprintf(p + len, "commands:\tlevel <level>"
4404                                " (<level> is 0-15)\n");
4405         }
4406
4407         return len;
4408 }
4409
4410 static int volume_write(char *buf)
4411 {
4412         int cmos_cmd, inc, i;
4413         u8 level, mute;
4414         int new_level, new_mute;
4415         char *cmd;
4416
4417         while ((cmd = next_cmd(&buf))) {
4418                 if (!acpi_ec_read(volume_offset, &level))
4419                         return -EIO;
4420                 new_mute = mute = level & 0x40;
4421                 new_level = level = level & 0xf;
4422
4423                 if (strlencmp(cmd, "up") == 0) {
4424                         if (mute)
4425                                 new_mute = 0;
4426                         else
4427                                 new_level = level == 15 ? 15 : level + 1;
4428                 } else if (strlencmp(cmd, "down") == 0) {
4429                         if (mute)
4430                                 new_mute = 0;
4431                         else
4432                                 new_level = level == 0 ? 0 : level - 1;
4433                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4434                            new_level >= 0 && new_level <= 15) {
4435                         /* new_level set */
4436                 } else if (strlencmp(cmd, "mute") == 0) {
4437                         new_mute = 0x40;
4438                 } else
4439                         return -EINVAL;
4440
4441                 if (new_level != level) {
4442                         /* mute doesn't change */
4443
4444                         cmos_cmd = (new_level > level) ?
4445                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4446                         inc = new_level > level ? 1 : -1;
4447
4448                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4449                                      !acpi_ec_write(volume_offset, level)))
4450                                 return -EIO;
4451
4452                         for (i = level; i != new_level; i += inc)
4453                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4454                                     !acpi_ec_write(volume_offset, i + inc))
4455                                         return -EIO;
4456
4457                         if (mute &&
4458                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4459                              !acpi_ec_write(volume_offset, new_level + mute))) {
4460                                 return -EIO;
4461                         }
4462                 }
4463
4464                 if (new_mute != mute) {
4465                         /* level doesn't change */
4466
4467                         cmos_cmd = (new_mute) ?
4468                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4469
4470                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4471                             !acpi_ec_write(volume_offset, level + new_mute))
4472                                 return -EIO;
4473                 }
4474         }
4475
4476         return 0;
4477 }
4478
4479 static struct ibm_struct volume_driver_data = {
4480         .name = "volume",
4481         .read = volume_read,
4482         .write = volume_write,
4483 };
4484
4485 /*************************************************************************
4486  * Fan subdriver
4487  */
4488
4489 /*
4490  * FAN ACCESS MODES
4491  *
4492  * TPACPI_FAN_RD_ACPI_GFAN:
4493  *      ACPI GFAN method: returns fan level
4494  *
4495  *      see TPACPI_FAN_WR_ACPI_SFAN
4496  *      EC 0x2f (HFSP) not available if GFAN exists
4497  *
4498  * TPACPI_FAN_WR_ACPI_SFAN:
4499  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4500  *
4501  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
4502  *      it for writing.
4503  *
4504  * TPACPI_FAN_WR_TPEC:
4505  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
4506  *      Supported on almost all ThinkPads
4507  *
4508  *      Fan speed changes of any sort (including those caused by the
4509  *      disengaged mode) are usually done slowly by the firmware as the
4510  *      maximum ammount of fan duty cycle change per second seems to be
4511  *      limited.
4512  *
4513  *      Reading is not available if GFAN exists.
4514  *      Writing is not available if SFAN exists.
4515  *
4516  *      Bits
4517  *       7      automatic mode engaged;
4518  *              (default operation mode of the ThinkPad)
4519  *              fan level is ignored in this mode.
4520  *       6      full speed mode (takes precedence over bit 7);
4521  *              not available on all thinkpads.  May disable
4522  *              the tachometer while the fan controller ramps up
4523  *              the speed (which can take up to a few *minutes*).
4524  *              Speeds up fan to 100% duty-cycle, which is far above
4525  *              the standard RPM levels.  It is not impossible that
4526  *              it could cause hardware damage.
4527  *      5-3     unused in some models.  Extra bits for fan level
4528  *              in others, but still useless as all values above
4529  *              7 map to the same speed as level 7 in these models.
4530  *      2-0     fan level (0..7 usually)
4531  *                      0x00 = stop
4532  *                      0x07 = max (set when temperatures critical)
4533  *              Some ThinkPads may have other levels, see
4534  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4535  *
4536  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4537  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4538  *      does so, its initial value is meaningless (0x07).
4539  *
4540  *      For firmware bugs, refer to:
4541  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4542  *
4543  *      ----
4544  *
4545  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4546  *      Main fan tachometer reading (in RPM)
4547  *
4548  *      This register is present on all ThinkPads with a new-style EC, and
4549  *      it is known not to be present on the A21m/e, and T22, as there is
4550  *      something else in offset 0x84 according to the ACPI DSDT.  Other
4551  *      ThinkPads from this same time period (and earlier) probably lack the
4552  *      tachometer as well.
4553  *
4554  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4555  *      was never fixed by IBM to report the EC firmware version string
4556  *      probably support the tachometer (like the early X models), so
4557  *      detecting it is quite hard.  We need more data to know for sure.
4558  *
4559  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4560  *      might result.
4561  *
4562  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
4563  *      mode.
4564  *
4565  *      For firmware bugs, refer to:
4566  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4567  *
4568  * TPACPI_FAN_WR_ACPI_FANS:
4569  *      ThinkPad X31, X40, X41.  Not available in the X60.
4570  *
4571  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
4572  *      high speed.  ACPI DSDT seems to map these three speeds to levels
4573  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4574  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4575  *
4576  *      The speeds are stored on handles
4577  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4578  *
4579  *      There are three default speed sets, acessible as handles:
4580  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4581  *
4582  *      ACPI DSDT switches which set is in use depending on various
4583  *      factors.
4584  *
4585  *      TPACPI_FAN_WR_TPEC is also available and should be used to
4586  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
4587  *      but the ACPI tables just mention level 7.
4588  */
4589
4590 enum {                                  /* Fan control constants */
4591         fan_status_offset = 0x2f,       /* EC register 0x2f */
4592         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
4593                                          * 0x84 must be read before 0x85 */
4594
4595         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
4596         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
4597
4598         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
4599 };
4600
4601 enum fan_status_access_mode {
4602         TPACPI_FAN_NONE = 0,            /* No fan status or control */
4603         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
4604         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
4605 };
4606
4607 enum fan_control_access_mode {
4608         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
4609         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
4610         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
4611         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
4612 };
4613
4614 enum fan_control_commands {
4615         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
4616         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
4617         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
4618                                                  * and also watchdog cmd */
4619 };
4620
4621 static int fan_control_allowed;
4622
4623 static enum fan_status_access_mode fan_status_access_mode;
4624 static enum fan_control_access_mode fan_control_access_mode;
4625 static enum fan_control_commands fan_control_commands;
4626
4627 static u8 fan_control_initial_status;
4628 static u8 fan_control_desired_level;
4629 static int fan_watchdog_maxinterval;
4630
4631 static struct mutex fan_mutex;
4632
4633 static void fan_watchdog_fire(struct work_struct *ignored);
4634 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4635
4636 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
4637 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
4638            "\\FSPD",            /* 600e/x, 770e, 770x */
4639            );                   /* all others */
4640 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
4641            "JFNS",              /* 770x-JL */
4642            );                   /* all others */
4643
4644 /*
4645  * Call with fan_mutex held
4646  */
4647 static void fan_update_desired_level(u8 status)
4648 {
4649         if ((status &
4650              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4651                 if (status > 7)
4652                         fan_control_desired_level = 7;
4653                 else
4654                         fan_control_desired_level = status;
4655         }
4656 }
4657
4658 static int fan_get_status(u8 *status)
4659 {
4660         u8 s;
4661
4662         /* TODO:
4663          * Add TPACPI_FAN_RD_ACPI_FANS ? */
4664
4665         switch (fan_status_access_mode) {
4666         case TPACPI_FAN_RD_ACPI_GFAN:
4667                 /* 570, 600e/x, 770e, 770x */
4668
4669                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4670                         return -EIO;
4671
4672                 if (likely(status))
4673                         *status = s & 0x07;
4674
4675                 break;
4676
4677         case TPACPI_FAN_RD_TPEC:
4678                 /* all except 570, 600e/x, 770e, 770x */
4679                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4680                         return -EIO;
4681
4682                 if (likely(status))
4683                         *status = s;
4684
4685                 break;
4686
4687         default:
4688                 return -ENXIO;
4689         }
4690
4691         return 0;
4692 }
4693
4694 static int fan_get_status_safe(u8 *status)
4695 {
4696         int rc;
4697         u8 s;
4698
4699         if (mutex_lock_interruptible(&fan_mutex))
4700                 return -ERESTARTSYS;
4701         rc = fan_get_status(&s);
4702         if (!rc)
4703                 fan_update_desired_level(s);
4704         mutex_unlock(&fan_mutex);
4705
4706         if (status)
4707                 *status = s;
4708
4709         return rc;
4710 }
4711
4712 static int fan_get_speed(unsigned int *speed)
4713 {
4714         u8 hi, lo;
4715
4716         switch (fan_status_access_mode) {
4717         case TPACPI_FAN_RD_TPEC:
4718                 /* all except 570, 600e/x, 770e, 770x */
4719                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4720                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4721                         return -EIO;
4722
4723                 if (likely(speed))
4724                         *speed = (hi << 8) | lo;
4725
4726                 break;
4727
4728         default:
4729                 return -ENXIO;
4730         }
4731
4732         return 0;
4733 }
4734
4735 static int fan_set_level(int level)
4736 {
4737         if (!fan_control_allowed)
4738                 return -EPERM;
4739
4740         switch (fan_control_access_mode) {
4741         case TPACPI_FAN_WR_ACPI_SFAN:
4742                 if (level >= 0 && level <= 7) {
4743                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4744                                 return -EIO;
4745                 } else
4746                         return -EINVAL;
4747                 break;
4748
4749         case TPACPI_FAN_WR_ACPI_FANS:
4750         case TPACPI_FAN_WR_TPEC:
4751                 if ((level != TP_EC_FAN_AUTO) &&
4752                     (level != TP_EC_FAN_FULLSPEED) &&
4753                     ((level < 0) || (level > 7)))
4754                         return -EINVAL;
4755
4756                 /* safety net should the EC not support AUTO
4757                  * or FULLSPEED mode bits and just ignore them */
4758                 if (level & TP_EC_FAN_FULLSPEED)
4759                         level |= 7;     /* safety min speed 7 */
4760                 else if (level & TP_EC_FAN_FULLSPEED)
4761                         level |= 4;     /* safety min speed 4 */
4762
4763                 if (!acpi_ec_write(fan_status_offset, level))
4764                         return -EIO;
4765                 else
4766                         tp_features.fan_ctrl_status_undef = 0;
4767                 break;
4768
4769         default:
4770                 return -ENXIO;
4771         }
4772         return 0;
4773 }
4774
4775 static int fan_set_level_safe(int level)
4776 {
4777         int rc;
4778
4779         if (!fan_control_allowed)
4780                 return -EPERM;
4781
4782         if (mutex_lock_interruptible(&fan_mutex))
4783                 return -ERESTARTSYS;
4784
4785         if (level == TPACPI_FAN_LAST_LEVEL)
4786                 level = fan_control_desired_level;
4787
4788         rc = fan_set_level(level);
4789         if (!rc)
4790                 fan_update_desired_level(level);
4791
4792         mutex_unlock(&fan_mutex);
4793         return rc;
4794 }
4795
4796 static int fan_set_enable(void)
4797 {
4798         u8 s;
4799         int rc;
4800
4801         if (!fan_control_allowed)
4802                 return -EPERM;
4803
4804         if (mutex_lock_interruptible(&fan_mutex))
4805                 return -ERESTARTSYS;
4806
4807         switch (fan_control_access_mode) {
4808         case TPACPI_FAN_WR_ACPI_FANS:
4809         case TPACPI_FAN_WR_TPEC:
4810                 rc = fan_get_status(&s);
4811                 if (rc < 0)
4812                         break;
4813
4814                 /* Don't go out of emergency fan mode */
4815                 if (s != 7) {
4816                         s &= 0x07;
4817                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4818                 }
4819
4820                 if (!acpi_ec_write(fan_status_offset, s))
4821                         rc = -EIO;
4822                 else {
4823                         tp_features.fan_ctrl_status_undef = 0;
4824                         rc = 0;
4825                 }
4826                 break;
4827
4828         case TPACPI_FAN_WR_ACPI_SFAN:
4829                 rc = fan_get_status(&s);
4830                 if (rc < 0)
4831                         break;
4832
4833                 s &= 0x07;
4834
4835                 /* Set fan to at least level 4 */
4836                 s |= 4;
4837
4838                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4839                         rc = -EIO;
4840                 else
4841                         rc = 0;
4842                 break;
4843
4844         default:
4845                 rc = -ENXIO;
4846         }
4847
4848         mutex_unlock(&fan_mutex);
4849         return rc;
4850 }
4851
4852 static int fan_set_disable(void)
4853 {
4854         int rc;
4855
4856         if (!fan_control_allowed)
4857                 return -EPERM;
4858
4859         if (mutex_lock_interruptible(&fan_mutex))
4860                 return -ERESTARTSYS;
4861
4862         rc = 0;
4863         switch (fan_control_access_mode) {
4864         case TPACPI_FAN_WR_ACPI_FANS:
4865         case TPACPI_FAN_WR_TPEC:
4866                 if (!acpi_ec_write(fan_status_offset, 0x00))
4867                         rc = -EIO;
4868                 else {
4869                         fan_control_desired_level = 0;
4870                         tp_features.fan_ctrl_status_undef = 0;
4871                 }
4872                 break;
4873
4874         case TPACPI_FAN_WR_ACPI_SFAN:
4875                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4876                         rc = -EIO;
4877                 else
4878                         fan_control_desired_level = 0;
4879                 break;
4880
4881         default:
4882                 rc = -ENXIO;
4883         }
4884
4885
4886         mutex_unlock(&fan_mutex);
4887         return rc;
4888 }
4889
4890 static int fan_set_speed(int speed)
4891 {
4892         int rc;
4893
4894         if (!fan_control_allowed)
4895                 return -EPERM;
4896
4897         if (mutex_lock_interruptible(&fan_mutex))
4898                 return -ERESTARTSYS;
4899
4900         rc = 0;
4901         switch (fan_control_access_mode) {
4902         case TPACPI_FAN_WR_ACPI_FANS:
4903                 if (speed >= 0 && speed <= 65535) {
4904                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
4905                                         speed, speed, speed))
4906                                 rc = -EIO;
4907                 } else
4908                         rc = -EINVAL;
4909                 break;
4910
4911         default:
4912                 rc = -ENXIO;
4913         }
4914
4915         mutex_unlock(&fan_mutex);
4916         return rc;
4917 }
4918
4919 static void fan_watchdog_reset(void)
4920 {
4921         static int fan_watchdog_active;
4922
4923         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
4924                 return;
4925
4926         if (fan_watchdog_active)
4927                 cancel_delayed_work(&fan_watchdog_task);
4928
4929         if (fan_watchdog_maxinterval > 0 &&
4930             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
4931                 fan_watchdog_active = 1;
4932                 if (!schedule_delayed_work(&fan_watchdog_task,
4933                                 msecs_to_jiffies(fan_watchdog_maxinterval
4934                                                  * 1000))) {
4935                         printk(TPACPI_ERR
4936                                "failed to schedule the fan watchdog, "
4937                                "watchdog will not trigger\n");
4938                 }
4939         } else
4940                 fan_watchdog_active = 0;
4941 }
4942
4943 static void fan_watchdog_fire(struct work_struct *ignored)
4944 {
4945         int rc;
4946
4947         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
4948                 return;
4949
4950         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
4951         rc = fan_set_enable();
4952         if (rc < 0) {
4953                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
4954                         "will try again later...\n", -rc);
4955                 /* reschedule for later */
4956                 fan_watchdog_reset();
4957         }
4958 }
4959
4960 /*
4961  * SYSFS fan layout: hwmon compatible (device)
4962  *
4963  * pwm*_enable:
4964  *      0: "disengaged" mode
4965  *      1: manual mode
4966  *      2: native EC "auto" mode (recommended, hardware default)
4967  *
4968  * pwm*: set speed in manual mode, ignored otherwise.
4969  *      0 is level 0; 255 is level 7. Intermediate points done with linear
4970  *      interpolation.
4971  *
4972  * fan*_input: tachometer reading, RPM
4973  *
4974  *
4975  * SYSFS fan layout: extensions
4976  *
4977  * fan_watchdog (driver):
4978  *      fan watchdog interval in seconds, 0 disables (default), max 120
4979  */
4980
4981 /* sysfs fan pwm1_enable ----------------------------------------------- */
4982 static ssize_t fan_pwm1_enable_show(struct device *dev,
4983                                     struct device_attribute *attr,
4984                                     char *buf)
4985 {
4986         int res, mode;
4987         u8 status;
4988
4989         res = fan_get_status_safe(&status);
4990         if (res)
4991                 return res;
4992
4993         if (unlikely(tp_features.fan_ctrl_status_undef)) {
4994                 if (status != fan_control_initial_status) {
4995                         tp_features.fan_ctrl_status_undef = 0;
4996                 } else {
4997                         /* Return most likely status. In fact, it
4998                          * might be the only possible status */
4999                         status = TP_EC_FAN_AUTO;
5000                 }
5001         }
5002
5003         if (status & TP_EC_FAN_FULLSPEED) {
5004                 mode = 0;
5005         } else if (status & TP_EC_FAN_AUTO) {
5006                 mode = 2;
5007         } else
5008                 mode = 1;
5009
5010         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5011 }
5012
5013 static ssize_t fan_pwm1_enable_store(struct device *dev,
5014                                      struct device_attribute *attr,
5015                                      const char *buf, size_t count)
5016 {
5017         unsigned long t;
5018         int res, level;
5019
5020         if (parse_strtoul(buf, 2, &t))
5021                 return -EINVAL;
5022
5023         switch (t) {
5024         case 0:
5025                 level = TP_EC_FAN_FULLSPEED;
5026                 break;
5027         case 1:
5028                 level = TPACPI_FAN_LAST_LEVEL;
5029                 break;
5030         case 2:
5031                 level = TP_EC_FAN_AUTO;
5032                 break;
5033         case 3:
5034                 /* reserved for software-controlled auto mode */
5035                 return -ENOSYS;
5036         default:
5037                 return -EINVAL;
5038         }
5039
5040         res = fan_set_level_safe(level);
5041         if (res == -ENXIO)
5042                 return -EINVAL;
5043         else if (res < 0)
5044                 return res;
5045
5046         fan_watchdog_reset();
5047
5048         return count;
5049 }
5050
5051 static struct device_attribute dev_attr_fan_pwm1_enable =
5052         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5053                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5054
5055 /* sysfs fan pwm1 ------------------------------------------------------ */
5056 static ssize_t fan_pwm1_show(struct device *dev,
5057                              struct device_attribute *attr,
5058                              char *buf)
5059 {
5060         int res;
5061         u8 status;
5062
5063         res = fan_get_status_safe(&status);
5064         if (res)
5065                 return res;
5066
5067         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5068                 if (status != fan_control_initial_status) {
5069                         tp_features.fan_ctrl_status_undef = 0;
5070                 } else {
5071                         status = TP_EC_FAN_AUTO;
5072                 }
5073         }
5074
5075         if ((status &
5076              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5077                 status = fan_control_desired_level;
5078
5079         if (status > 7)
5080                 status = 7;
5081
5082         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5083 }
5084
5085 static ssize_t fan_pwm1_store(struct device *dev,
5086                               struct device_attribute *attr,
5087                               const char *buf, size_t count)
5088 {
5089         unsigned long s;
5090         int rc;
5091         u8 status, newlevel;
5092
5093         if (parse_strtoul(buf, 255, &s))
5094                 return -EINVAL;
5095
5096         /* scale down from 0-255 to 0-7 */
5097         newlevel = (s >> 5) & 0x07;
5098
5099         if (mutex_lock_interruptible(&fan_mutex))
5100                 return -ERESTARTSYS;
5101
5102         rc = fan_get_status(&status);
5103         if (!rc && (status &
5104                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5105                 rc = fan_set_level(newlevel);
5106                 if (rc == -ENXIO)
5107                         rc = -EINVAL;
5108                 else if (!rc) {
5109                         fan_update_desired_level(newlevel);
5110                         fan_watchdog_reset();
5111                 }
5112         }
5113
5114         mutex_unlock(&fan_mutex);
5115         return (rc)? rc : count;
5116 }
5117
5118 static struct device_attribute dev_attr_fan_pwm1 =
5119         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5120                 fan_pwm1_show, fan_pwm1_store);
5121
5122 /* sysfs fan fan1_input ------------------------------------------------ */
5123 static ssize_t fan_fan1_input_show(struct device *dev,
5124                            struct device_attribute *attr,
5125                            char *buf)
5126 {
5127         int res;
5128         unsigned int speed;
5129
5130         res = fan_get_speed(&speed);
5131         if (res < 0)
5132                 return res;
5133
5134         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5135 }
5136
5137 static struct device_attribute dev_attr_fan_fan1_input =
5138         __ATTR(fan1_input, S_IRUGO,
5139                 fan_fan1_input_show, NULL);
5140
5141 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5142 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5143                                      char *buf)
5144 {
5145         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5146 }
5147
5148 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5149                                       const char *buf, size_t count)
5150 {
5151         unsigned long t;
5152
5153         if (parse_strtoul(buf, 120, &t))
5154                 return -EINVAL;
5155
5156         if (!fan_control_allowed)
5157                 return -EPERM;
5158
5159         fan_watchdog_maxinterval = t;
5160         fan_watchdog_reset();
5161
5162         return count;
5163 }
5164
5165 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5166                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5167
5168 /* --------------------------------------------------------------------- */
5169 static struct attribute *fan_attributes[] = {
5170         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5171         &dev_attr_fan_fan1_input.attr,
5172         NULL
5173 };
5174
5175 static const struct attribute_group fan_attr_group = {
5176         .attrs = fan_attributes,
5177 };
5178
5179 static int __init fan_init(struct ibm_init_struct *iibm)
5180 {
5181         int rc;
5182
5183         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5184
5185         mutex_init(&fan_mutex);
5186         fan_status_access_mode = TPACPI_FAN_NONE;
5187         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5188         fan_control_commands = 0;
5189         fan_watchdog_maxinterval = 0;
5190         tp_features.fan_ctrl_status_undef = 0;
5191         fan_control_desired_level = 7;
5192
5193         TPACPI_ACPIHANDLE_INIT(fans);
5194         TPACPI_ACPIHANDLE_INIT(gfan);
5195         TPACPI_ACPIHANDLE_INIT(sfan);
5196
5197         if (gfan_handle) {
5198                 /* 570, 600e/x, 770e, 770x */
5199                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5200         } else {
5201                 /* all other ThinkPads: note that even old-style
5202                  * ThinkPad ECs supports the fan control register */
5203                 if (likely(acpi_ec_read(fan_status_offset,
5204                                         &fan_control_initial_status))) {
5205                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5206
5207                         /* In some ThinkPads, neither the EC nor the ACPI
5208                          * DSDT initialize the fan status, and it ends up
5209                          * being set to 0x07 when it *could* be either
5210                          * 0x07 or 0x80.
5211                          *
5212                          * Enable for TP-1Y (T43), TP-78 (R51e),
5213                          * TP-76 (R52), TP-70 (T43, R52), which are known
5214                          * to be buggy. */
5215                         if (fan_control_initial_status == 0x07) {
5216                                 switch (thinkpad_id.ec_model) {
5217                                 case 0x5931: /* TP-1Y */
5218                                 case 0x3837: /* TP-78 */
5219                                 case 0x3637: /* TP-76 */
5220                                 case 0x3037: /* TP-70 */
5221                                         printk(TPACPI_NOTICE
5222                                                "fan_init: initial fan status "
5223                                                "is unknown, assuming it is "
5224                                                "in auto mode\n");
5225                                         tp_features.fan_ctrl_status_undef = 1;
5226                                         ;;
5227                                 }
5228                         }
5229                 } else {
5230                         printk(TPACPI_ERR
5231                                "ThinkPad ACPI EC access misbehaving, "
5232                                "fan status and control unavailable\n");
5233                         return 1;
5234                 }
5235         }
5236
5237         if (sfan_handle) {
5238                 /* 570, 770x-JL */
5239                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5240                 fan_control_commands |=
5241                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5242         } else {
5243                 if (!gfan_handle) {
5244                         /* gfan without sfan means no fan control */
5245                         /* all other models implement TP EC 0x2f control */
5246
5247                         if (fans_handle) {
5248                                 /* X31, X40, X41 */
5249                                 fan_control_access_mode =
5250                                     TPACPI_FAN_WR_ACPI_FANS;
5251                                 fan_control_commands |=
5252                                     TPACPI_FAN_CMD_SPEED |
5253                                     TPACPI_FAN_CMD_LEVEL |
5254                                     TPACPI_FAN_CMD_ENABLE;
5255                         } else {
5256                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5257                                 fan_control_commands |=
5258                                     TPACPI_FAN_CMD_LEVEL |
5259                                     TPACPI_FAN_CMD_ENABLE;
5260                         }
5261                 }
5262         }
5263
5264         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5265                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5266                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5267                 fan_status_access_mode, fan_control_access_mode);
5268
5269         /* fan control master switch */
5270         if (!fan_control_allowed) {
5271                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5272                 fan_control_commands = 0;
5273                 dbg_printk(TPACPI_DBG_INIT,
5274                            "fan control features disabled by parameter\n");
5275         }
5276
5277         /* update fan_control_desired_level */
5278         if (fan_status_access_mode != TPACPI_FAN_NONE)
5279                 fan_get_status_safe(NULL);
5280
5281         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5282             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5283                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5284                                          &fan_attr_group);
5285                 if (!(rc < 0))
5286                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5287                                         &driver_attr_fan_watchdog);
5288                 if (rc < 0)
5289                         return rc;
5290                 return 0;
5291         } else
5292                 return 1;
5293 }
5294
5295 static void fan_exit(void)
5296 {
5297         vdbg_printk(TPACPI_DBG_EXIT,
5298                     "cancelling any pending fan watchdog tasks\n");
5299
5300         /* FIXME: can we really do this unconditionally? */
5301         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5302         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5303                            &driver_attr_fan_watchdog);
5304
5305         cancel_delayed_work(&fan_watchdog_task);
5306         flush_scheduled_work();
5307 }
5308
5309 static int fan_read(char *p)
5310 {
5311         int len = 0;
5312         int rc;
5313         u8 status;
5314         unsigned int speed = 0;
5315
5316         switch (fan_status_access_mode) {
5317         case TPACPI_FAN_RD_ACPI_GFAN:
5318                 /* 570, 600e/x, 770e, 770x */
5319                 rc = fan_get_status_safe(&status);
5320                 if (rc < 0)
5321                         return rc;
5322
5323                 len += sprintf(p + len, "status:\t\t%s\n"
5324                                "level:\t\t%d\n",
5325                                (status != 0) ? "enabled" : "disabled", status);
5326                 break;
5327
5328         case TPACPI_FAN_RD_TPEC:
5329                 /* all except 570, 600e/x, 770e, 770x */
5330                 rc = fan_get_status_safe(&status);
5331                 if (rc < 0)
5332                         return rc;
5333
5334                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5335                         if (status != fan_control_initial_status)
5336                                 tp_features.fan_ctrl_status_undef = 0;
5337                         else
5338                                 /* Return most likely status. In fact, it
5339                                  * might be the only possible status */
5340                                 status = TP_EC_FAN_AUTO;
5341                 }
5342
5343                 len += sprintf(p + len, "status:\t\t%s\n",
5344                                (status != 0) ? "enabled" : "disabled");
5345
5346                 rc = fan_get_speed(&speed);
5347                 if (rc < 0)
5348                         return rc;
5349
5350                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5351
5352                 if (status & TP_EC_FAN_FULLSPEED)
5353                         /* Disengaged mode takes precedence */
5354                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5355                 else if (status & TP_EC_FAN_AUTO)
5356                         len += sprintf(p + len, "level:\t\tauto\n");
5357                 else
5358                         len += sprintf(p + len, "level:\t\t%d\n", status);
5359                 break;
5360
5361         case TPACPI_FAN_NONE:
5362         default:
5363                 len += sprintf(p + len, "status:\t\tnot supported\n");
5364         }
5365
5366         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5367                 len += sprintf(p + len, "commands:\tlevel <level>");
5368
5369                 switch (fan_control_access_mode) {
5370                 case TPACPI_FAN_WR_ACPI_SFAN:
5371                         len += sprintf(p + len, " (<level> is 0-7)\n");
5372                         break;
5373
5374                 default:
5375                         len += sprintf(p + len, " (<level> is 0-7, "
5376                                        "auto, disengaged, full-speed)\n");
5377                         break;
5378                 }
5379         }
5380
5381         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5382                 len += sprintf(p + len, "commands:\tenable, disable\n"
5383                                "commands:\twatchdog <timeout> (<timeout> "
5384                                "is 0 (off), 1-120 (seconds))\n");
5385
5386         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5387                 len += sprintf(p + len, "commands:\tspeed <speed>"
5388                                " (<speed> is 0-65535)\n");
5389
5390         return len;
5391 }
5392
5393 static int fan_write_cmd_level(const char *cmd, int *rc)
5394 {
5395         int level;
5396
5397         if (strlencmp(cmd, "level auto") == 0)
5398                 level = TP_EC_FAN_AUTO;
5399         else if ((strlencmp(cmd, "level disengaged") == 0) |
5400                         (strlencmp(cmd, "level full-speed") == 0))
5401                 level = TP_EC_FAN_FULLSPEED;
5402         else if (sscanf(cmd, "level %d", &level) != 1)
5403                 return 0;
5404
5405         *rc = fan_set_level_safe(level);
5406         if (*rc == -ENXIO)
5407                 printk(TPACPI_ERR "level command accepted for unsupported "
5408                        "access mode %d", fan_control_access_mode);
5409
5410         return 1;
5411 }
5412
5413 static int fan_write_cmd_enable(const char *cmd, int *rc)
5414 {
5415         if (strlencmp(cmd, "enable") != 0)
5416                 return 0;
5417
5418         *rc = fan_set_enable();
5419         if (*rc == -ENXIO)
5420                 printk(TPACPI_ERR "enable command accepted for unsupported "
5421                        "access mode %d", fan_control_access_mode);
5422
5423         return 1;
5424 }
5425
5426 static int fan_write_cmd_disable(const char *cmd, int *rc)
5427 {
5428         if (strlencmp(cmd, "disable") != 0)
5429                 return 0;
5430
5431         *rc = fan_set_disable();
5432         if (*rc == -ENXIO)
5433                 printk(TPACPI_ERR "disable command accepted for unsupported "
5434                        "access mode %d", fan_control_access_mode);
5435
5436         return 1;
5437 }
5438
5439 static int fan_write_cmd_speed(const char *cmd, int *rc)
5440 {
5441         int speed;
5442
5443         /* TODO:
5444          * Support speed <low> <medium> <high> ? */
5445
5446         if (sscanf(cmd, "speed %d", &speed) != 1)
5447                 return 0;
5448
5449         *rc = fan_set_speed(speed);
5450         if (*rc == -ENXIO)
5451                 printk(TPACPI_ERR "speed command accepted for unsupported "
5452                        "access mode %d", fan_control_access_mode);
5453
5454         return 1;
5455 }
5456
5457 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5458 {
5459         int interval;
5460
5461         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5462                 return 0;
5463
5464         if (interval < 0 || interval > 120)
5465                 *rc = -EINVAL;
5466         else
5467                 fan_watchdog_maxinterval = interval;
5468
5469         return 1;
5470 }
5471
5472 static int fan_write(char *buf)
5473 {
5474         char *cmd;
5475         int rc = 0;
5476
5477         while (!rc && (cmd = next_cmd(&buf))) {
5478                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5479                       fan_write_cmd_level(cmd, &rc)) &&
5480                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5481                       (fan_write_cmd_enable(cmd, &rc) ||
5482                        fan_write_cmd_disable(cmd, &rc) ||
5483                        fan_write_cmd_watchdog(cmd, &rc))) &&
5484                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5485                       fan_write_cmd_speed(cmd, &rc))
5486                     )
5487                         rc = -EINVAL;
5488                 else if (!rc)
5489                         fan_watchdog_reset();
5490         }
5491
5492         return rc;
5493 }
5494
5495 static struct ibm_struct fan_driver_data = {
5496         .name = "fan",
5497         .read = fan_read,
5498         .write = fan_write,
5499         .exit = fan_exit,
5500 };
5501
5502 /****************************************************************************
5503  ****************************************************************************
5504  *
5505  * Infrastructure
5506  *
5507  ****************************************************************************
5508  ****************************************************************************/
5509
5510 /* sysfs name ---------------------------------------------------------- */
5511 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5512                            struct device_attribute *attr,
5513                            char *buf)
5514 {
5515         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5516 }
5517
5518 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5519         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5520
5521 /* --------------------------------------------------------------------- */
5522
5523 /* /proc support */
5524 static struct proc_dir_entry *proc_dir;
5525
5526 /*
5527  * Module and infrastructure proble, init and exit handling
5528  */
5529
5530 static int force_load;
5531
5532 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5533 static const char * __init str_supported(int is_supported)
5534 {
5535         static char text_unsupported[] __initdata = "not supported";
5536
5537         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5538 }
5539 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5540
5541 static void ibm_exit(struct ibm_struct *ibm)
5542 {
5543         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5544
5545         list_del_init(&ibm->all_drivers);
5546
5547         if (ibm->flags.acpi_notify_installed) {
5548                 dbg_printk(TPACPI_DBG_EXIT,
5549                         "%s: acpi_remove_notify_handler\n", ibm->name);
5550                 BUG_ON(!ibm->acpi);
5551                 acpi_remove_notify_handler(*ibm->acpi->handle,
5552                                            ibm->acpi->type,
5553                                            dispatch_acpi_notify);
5554                 ibm->flags.acpi_notify_installed = 0;
5555                 ibm->flags.acpi_notify_installed = 0;
5556         }
5557
5558         if (ibm->flags.proc_created) {
5559                 dbg_printk(TPACPI_DBG_EXIT,
5560                         "%s: remove_proc_entry\n", ibm->name);
5561                 remove_proc_entry(ibm->name, proc_dir);
5562                 ibm->flags.proc_created = 0;
5563         }
5564
5565         if (ibm->flags.acpi_driver_registered) {
5566                 dbg_printk(TPACPI_DBG_EXIT,
5567                         "%s: acpi_bus_unregister_driver\n", ibm->name);
5568                 BUG_ON(!ibm->acpi);
5569                 acpi_bus_unregister_driver(ibm->acpi->driver);
5570                 kfree(ibm->acpi->driver);
5571                 ibm->acpi->driver = NULL;
5572                 ibm->flags.acpi_driver_registered = 0;
5573         }
5574
5575         if (ibm->flags.init_called && ibm->exit) {
5576                 ibm->exit();
5577                 ibm->flags.init_called = 0;
5578         }
5579
5580         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5581 }
5582
5583 static int __init ibm_init(struct ibm_init_struct *iibm)
5584 {
5585         int ret;
5586         struct ibm_struct *ibm = iibm->data;
5587         struct proc_dir_entry *entry;
5588
5589         BUG_ON(ibm == NULL);
5590
5591         INIT_LIST_HEAD(&ibm->all_drivers);
5592
5593         if (ibm->flags.experimental && !experimental)
5594                 return 0;
5595
5596         dbg_printk(TPACPI_DBG_INIT,
5597                 "probing for %s\n", ibm->name);
5598
5599         if (iibm->init) {
5600                 ret = iibm->init(iibm);
5601                 if (ret > 0)
5602                         return 0;       /* probe failed */
5603                 if (ret)
5604                         return ret;
5605
5606                 ibm->flags.init_called = 1;
5607         }
5608
5609         if (ibm->acpi) {
5610                 if (ibm->acpi->hid) {
5611                         ret = register_tpacpi_subdriver(ibm);
5612                         if (ret)
5613                                 goto err_out;
5614                 }
5615
5616                 if (ibm->acpi->notify) {
5617                         ret = setup_acpi_notify(ibm);
5618                         if (ret == -ENODEV) {
5619                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
5620                                         ibm->name);
5621                                 ret = 0;
5622                                 goto err_out;
5623                         }
5624                         if (ret < 0)
5625                                 goto err_out;
5626                 }
5627         }
5628
5629         dbg_printk(TPACPI_DBG_INIT,
5630                 "%s installed\n", ibm->name);
5631
5632         if (ibm->read) {
5633                 entry = create_proc_entry(ibm->name,
5634                                           S_IFREG | S_IRUGO | S_IWUSR,
5635                                           proc_dir);
5636                 if (!entry) {
5637                         printk(TPACPI_ERR "unable to create proc entry %s\n",
5638                                ibm->name);
5639                         ret = -ENODEV;
5640                         goto err_out;
5641                 }
5642                 entry->owner = THIS_MODULE;
5643                 entry->data = ibm;
5644                 entry->read_proc = &dispatch_procfs_read;
5645                 if (ibm->write)
5646                         entry->write_proc = &dispatch_procfs_write;
5647                 ibm->flags.proc_created = 1;
5648         }
5649
5650         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5651
5652         return 0;
5653
5654 err_out:
5655         dbg_printk(TPACPI_DBG_INIT,
5656                 "%s: at error exit path with result %d\n",
5657                 ibm->name, ret);
5658
5659         ibm_exit(ibm);
5660         return (ret < 0)? ret : 0;
5661 }
5662
5663 /* Probing */
5664
5665 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5666 {
5667         const struct dmi_device *dev = NULL;
5668         char ec_fw_string[18];
5669
5670         if (!tp)
5671                 return;
5672
5673         memset(tp, 0, sizeof(*tp));
5674
5675         if (dmi_name_in_vendors("IBM"))
5676                 tp->vendor = PCI_VENDOR_ID_IBM;
5677         else if (dmi_name_in_vendors("LENOVO"))
5678                 tp->vendor = PCI_VENDOR_ID_LENOVO;
5679         else
5680                 return;
5681
5682         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5683                                         GFP_KERNEL);
5684         if (!tp->bios_version_str)
5685                 return;
5686         tp->bios_model = tp->bios_version_str[0]
5687                          | (tp->bios_version_str[1] << 8);
5688
5689         /*
5690          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5691          * X32 or newer, all Z series;  Some models must have an
5692          * up-to-date BIOS or they will not be detected.
5693          *
5694          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5695          */
5696         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5697                 if (sscanf(dev->name,
5698                            "IBM ThinkPad Embedded Controller -[%17c",
5699                            ec_fw_string) == 1) {
5700                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5701                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5702
5703                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5704                         tp->ec_model = ec_fw_string[0]
5705                                         | (ec_fw_string[1] << 8);
5706                         break;
5707                 }
5708         }
5709
5710         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
5711                                         GFP_KERNEL);
5712         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
5713                 kfree(tp->model_str);
5714                 tp->model_str = NULL;
5715         }
5716 }
5717
5718 static int __init probe_for_thinkpad(void)
5719 {
5720         int is_thinkpad;
5721
5722         if (acpi_disabled)
5723                 return -ENODEV;
5724
5725         /*
5726          * Non-ancient models have better DMI tagging, but very old models
5727          * don't.
5728          */
5729         is_thinkpad = (thinkpad_id.model_str != NULL);
5730
5731         /* ec is required because many other handles are relative to it */
5732         TPACPI_ACPIHANDLE_INIT(ec);
5733         if (!ec_handle) {
5734                 if (is_thinkpad)
5735                         printk(TPACPI_ERR
5736                                 "Not yet supported ThinkPad detected!\n");
5737                 return -ENODEV;
5738         }
5739
5740         /*
5741          * Risks a regression on very old machines, but reduces potential
5742          * false positives a damn great deal
5743          */
5744         if (!is_thinkpad)
5745                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
5746
5747         if (!is_thinkpad && !force_load)
5748                 return -ENODEV;
5749
5750         return 0;
5751 }
5752
5753
5754 /* Module init, exit, parameters */
5755
5756 static struct ibm_init_struct ibms_init[] __initdata = {
5757         {
5758                 .init = thinkpad_acpi_driver_init,
5759                 .data = &thinkpad_acpi_driver_data,
5760         },
5761         {
5762                 .init = hotkey_init,
5763                 .data = &hotkey_driver_data,
5764         },
5765         {
5766                 .init = bluetooth_init,
5767                 .data = &bluetooth_driver_data,
5768         },
5769         {
5770                 .init = wan_init,
5771                 .data = &wan_driver_data,
5772         },
5773         {
5774                 .init = video_init,
5775                 .data = &video_driver_data,
5776         },
5777         {
5778                 .init = light_init,
5779                 .data = &light_driver_data,
5780         },
5781 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5782         {
5783                 .init = dock_init,
5784                 .data = &dock_driver_data[0],
5785         },
5786         {
5787                 .init = dock_init2,
5788                 .data = &dock_driver_data[1],
5789         },
5790 #endif
5791 #ifdef CONFIG_THINKPAD_ACPI_BAY
5792         {
5793                 .init = bay_init,
5794                 .data = &bay_driver_data,
5795         },
5796 #endif
5797         {
5798                 .init = cmos_init,
5799                 .data = &cmos_driver_data,
5800         },
5801         {
5802                 .init = led_init,
5803                 .data = &led_driver_data,
5804         },
5805         {
5806                 .init = beep_init,
5807                 .data = &beep_driver_data,
5808         },
5809         {
5810                 .init = thermal_init,
5811                 .data = &thermal_driver_data,
5812         },
5813         {
5814                 .data = &ecdump_driver_data,
5815         },
5816         {
5817                 .init = brightness_init,
5818                 .data = &brightness_driver_data,
5819         },
5820         {
5821                 .data = &volume_driver_data,
5822         },
5823         {
5824                 .init = fan_init,
5825                 .data = &fan_driver_data,
5826         },
5827 };
5828
5829 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
5830 {
5831         unsigned int i;
5832         struct ibm_struct *ibm;
5833
5834         if (!kp || !kp->name || !val)
5835                 return -EINVAL;
5836
5837         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
5838                 ibm = ibms_init[i].data;
5839                 WARN_ON(ibm == NULL);
5840
5841                 if (!ibm || !ibm->name)
5842                         continue;
5843
5844                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
5845                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
5846                                 return -ENOSPC;
5847                         strcpy(ibms_init[i].param, val);
5848                         strcat(ibms_init[i].param, ",");
5849                         return 0;
5850                 }
5851         }
5852
5853         return -EINVAL;
5854 }
5855
5856 module_param(experimental, int, 0);
5857 MODULE_PARM_DESC(experimental,
5858                  "Enables experimental features when non-zero");
5859
5860 module_param_named(debug, dbg_level, uint, 0);
5861 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
5862
5863 module_param(force_load, bool, 0);
5864 MODULE_PARM_DESC(force_load,
5865                  "Attempts to load the driver even on a "
5866                  "mis-identified ThinkPad when true");
5867
5868 module_param_named(fan_control, fan_control_allowed, bool, 0);
5869 MODULE_PARM_DESC(fan_control,
5870                  "Enables setting fan parameters features when true");
5871
5872 module_param_named(brightness_mode, brightness_mode, int, 0);
5873 MODULE_PARM_DESC(brightness_mode,
5874                  "Selects brightness control strategy: "
5875                  "0=auto, 1=EC, 2=CMOS, 3=both");
5876
5877 module_param(brightness_enable, uint, 0);
5878 MODULE_PARM_DESC(brightness_enable,
5879                  "Enables backlight control when 1, disables when 0");
5880
5881 module_param(hotkey_report_mode, uint, 0);
5882 MODULE_PARM_DESC(hotkey_report_mode,
5883                  "used for backwards compatibility with userspace, "
5884                  "see documentation");
5885
5886 #define TPACPI_PARAM(feature) \
5887         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
5888         MODULE_PARM_DESC(feature, "Simulates thinkpad-aci procfs command " \
5889                          "at module load, see documentation")
5890
5891 TPACPI_PARAM(hotkey);
5892 TPACPI_PARAM(bluetooth);
5893 TPACPI_PARAM(video);
5894 TPACPI_PARAM(light);
5895 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5896 TPACPI_PARAM(dock);
5897 #endif
5898 #ifdef CONFIG_THINKPAD_ACPI_BAY
5899 TPACPI_PARAM(bay);
5900 #endif /* CONFIG_THINKPAD_ACPI_BAY */
5901 TPACPI_PARAM(cmos);
5902 TPACPI_PARAM(led);
5903 TPACPI_PARAM(beep);
5904 TPACPI_PARAM(ecdump);
5905 TPACPI_PARAM(brightness);
5906 TPACPI_PARAM(volume);
5907 TPACPI_PARAM(fan);
5908
5909 static void thinkpad_acpi_module_exit(void)
5910 {
5911         struct ibm_struct *ibm, *itmp;
5912
5913         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
5914
5915         list_for_each_entry_safe_reverse(ibm, itmp,
5916                                          &tpacpi_all_drivers,
5917                                          all_drivers) {
5918                 ibm_exit(ibm);
5919         }
5920
5921         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
5922
5923         if (tpacpi_inputdev) {
5924                 if (tp_features.input_device_registered)
5925                         input_unregister_device(tpacpi_inputdev);
5926                 else
5927                         input_free_device(tpacpi_inputdev);
5928         }
5929
5930         if (tpacpi_hwmon)
5931                 hwmon_device_unregister(tpacpi_hwmon);
5932
5933         if (tp_features.sensors_pdev_attrs_registered)
5934                 device_remove_file(&tpacpi_sensors_pdev->dev,
5935                                    &dev_attr_thinkpad_acpi_pdev_name);
5936         if (tpacpi_sensors_pdev)
5937                 platform_device_unregister(tpacpi_sensors_pdev);
5938         if (tpacpi_pdev)
5939                 platform_device_unregister(tpacpi_pdev);
5940
5941         if (tp_features.sensors_pdrv_attrs_registered)
5942                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
5943         if (tp_features.platform_drv_attrs_registered)
5944                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
5945
5946         if (tp_features.sensors_pdrv_registered)
5947                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
5948
5949         if (tp_features.platform_drv_registered)
5950                 platform_driver_unregister(&tpacpi_pdriver);
5951
5952         if (proc_dir)
5953                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
5954
5955         kfree(thinkpad_id.bios_version_str);
5956         kfree(thinkpad_id.ec_version_str);
5957         kfree(thinkpad_id.model_str);
5958 }
5959
5960
5961 static int __init thinkpad_acpi_module_init(void)
5962 {
5963         int ret, i;
5964
5965         tpacpi_lifecycle = TPACPI_LIFE_INIT;
5966
5967         /* Parameter checking */
5968         if (hotkey_report_mode > 2)
5969                 return -EINVAL;
5970
5971         /* Driver-level probe */
5972
5973         get_thinkpad_model_data(&thinkpad_id);
5974         ret = probe_for_thinkpad();
5975         if (ret) {
5976                 thinkpad_acpi_module_exit();
5977                 return ret;
5978         }
5979
5980         /* Driver initialization */
5981
5982         TPACPI_ACPIHANDLE_INIT(ecrd);
5983         TPACPI_ACPIHANDLE_INIT(ecwr);
5984
5985         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
5986         if (!proc_dir) {
5987                 printk(TPACPI_ERR
5988                        "unable to create proc dir " TPACPI_PROC_DIR);
5989                 thinkpad_acpi_module_exit();
5990                 return -ENODEV;
5991         }
5992         proc_dir->owner = THIS_MODULE;
5993
5994         ret = platform_driver_register(&tpacpi_pdriver);
5995         if (ret) {
5996                 printk(TPACPI_ERR
5997                        "unable to register main platform driver\n");
5998                 thinkpad_acpi_module_exit();
5999                 return ret;
6000         }
6001         tp_features.platform_drv_registered = 1;
6002
6003         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6004         if (ret) {
6005                 printk(TPACPI_ERR
6006                        "unable to register hwmon platform driver\n");
6007                 thinkpad_acpi_module_exit();
6008                 return ret;
6009         }
6010         tp_features.sensors_pdrv_registered = 1;
6011
6012         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6013         if (!ret) {
6014                 tp_features.platform_drv_attrs_registered = 1;
6015                 ret = tpacpi_create_driver_attributes(
6016                                         &tpacpi_hwmon_pdriver.driver);
6017         }
6018         if (ret) {
6019                 printk(TPACPI_ERR
6020                        "unable to create sysfs driver attributes\n");
6021                 thinkpad_acpi_module_exit();
6022                 return ret;
6023         }
6024         tp_features.sensors_pdrv_attrs_registered = 1;
6025
6026
6027         /* Device initialization */
6028         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6029                                                         NULL, 0);
6030         if (IS_ERR(tpacpi_pdev)) {
6031                 ret = PTR_ERR(tpacpi_pdev);
6032                 tpacpi_pdev = NULL;
6033                 printk(TPACPI_ERR "unable to register platform device\n");
6034                 thinkpad_acpi_module_exit();
6035                 return ret;
6036         }
6037         tpacpi_sensors_pdev = platform_device_register_simple(
6038                                                 TPACPI_HWMON_DRVR_NAME,
6039                                                 -1, NULL, 0);
6040         if (IS_ERR(tpacpi_sensors_pdev)) {
6041                 ret = PTR_ERR(tpacpi_sensors_pdev);
6042                 tpacpi_sensors_pdev = NULL;
6043                 printk(TPACPI_ERR
6044                        "unable to register hwmon platform device\n");
6045                 thinkpad_acpi_module_exit();
6046                 return ret;
6047         }
6048         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6049                                  &dev_attr_thinkpad_acpi_pdev_name);
6050         if (ret) {
6051                 printk(TPACPI_ERR
6052                        "unable to create sysfs hwmon device attributes\n");
6053                 thinkpad_acpi_module_exit();
6054                 return ret;
6055         }
6056         tp_features.sensors_pdev_attrs_registered = 1;
6057         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6058         if (IS_ERR(tpacpi_hwmon)) {
6059                 ret = PTR_ERR(tpacpi_hwmon);
6060                 tpacpi_hwmon = NULL;
6061                 printk(TPACPI_ERR "unable to register hwmon device\n");
6062                 thinkpad_acpi_module_exit();
6063                 return ret;
6064         }
6065         mutex_init(&tpacpi_inputdev_send_mutex);
6066         tpacpi_inputdev = input_allocate_device();
6067         if (!tpacpi_inputdev) {
6068                 printk(TPACPI_ERR "unable to allocate input device\n");
6069                 thinkpad_acpi_module_exit();
6070                 return -ENOMEM;
6071         } else {
6072                 /* Prepare input device, but don't register */
6073                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6074                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6075                 tpacpi_inputdev->id.bustype = BUS_HOST;
6076                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6077                                                 thinkpad_id.vendor :
6078                                                 PCI_VENDOR_ID_IBM;
6079                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6080                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6081         }
6082         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6083                 ret = ibm_init(&ibms_init[i]);
6084                 if (ret >= 0 && *ibms_init[i].param)
6085                         ret = ibms_init[i].data->write(ibms_init[i].param);
6086                 if (ret < 0) {
6087                         thinkpad_acpi_module_exit();
6088                         return ret;
6089                 }
6090         }
6091         ret = input_register_device(tpacpi_inputdev);
6092         if (ret < 0) {
6093                 printk(TPACPI_ERR "unable to register input device\n");
6094                 thinkpad_acpi_module_exit();
6095                 return ret;
6096         } else {
6097                 tp_features.input_device_registered = 1;
6098         }
6099
6100         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6101         return 0;
6102 }
6103
6104 /* Please remove this in year 2009 */
6105 MODULE_ALIAS("ibm_acpi");
6106
6107 /*
6108  * DMI matching for module autoloading
6109  *
6110  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6111  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6112  *
6113  * Only models listed in thinkwiki will be supported, so add yours
6114  * if it is not there yet.
6115  */
6116 #define IBM_BIOS_MODULE_ALIAS(__type) \
6117         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6118
6119 /* Non-ancient thinkpads */
6120 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6121 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6122
6123 /* Ancient thinkpad BIOSes have to be identified by
6124  * BIOS type or model number, and there are far less
6125  * BIOS types than model numbers... */
6126 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6127 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6128 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6129
6130 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6131 MODULE_DESCRIPTION(TPACPI_DESC);
6132 MODULE_VERSION(TPACPI_VERSION);
6133 MODULE_LICENSE("GPL");
6134
6135 module_init(thinkpad_acpi_module_init);
6136 module_exit(thinkpad_acpi_module_exit);