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   1 /*
   2  *  thinkpad_acpi.c - ThinkPad ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net>
   6  *  Copyright (C) 2006-2008 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License as published by
  10  *  the Free Software Foundation; either version 2 of the License, or
  11  *  (at your option) any later version.
  12  *
  13  *  This program is distributed in the hope that it will be useful,
  14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  *  GNU General Public License for more details.
  17  *
  18  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  21  *  02110-1301, USA.
  22  */
  23
  24 #define TPACPI_VERSION "0.19"
  25 #define TPACPI_SYSFS_VERSION 0x020200
  26
  27 /*
  28  *  Changelog:
  29  *  2007-10-20          changelog trimmed down
  30  *
  31  *  2007-03-27  0.14    renamed to thinkpad_acpi and moved to
  32  *                      drivers/misc.
  33  *
  34  *  2006-11-22  0.13    new maintainer
  35  *                      changelog now lives in git commit history, and will
  36  *                      not be updated further in-file.
  37  *
  38  *  2005-03-17  0.11    support for 600e, 770x
  39  *                          thanks to Jamie Lentin <lentinj@dial.pipex.com>
  40  *
  41  *  2005-01-16  0.9     use MODULE_VERSION
  42  *                          thanks to Henrik Brix Andersen <brix@gentoo.org>
  43  *                      fix parameter passing on module loading
  44  *                          thanks to Rusty Russell <rusty@rustcorp.com.au>
  45  *                          thanks to Jim Radford <radford@blackbean.org>
  46  *  2004-11-08  0.8     fix init error case, don't return from a macro
  47  *                          thanks to Chris Wright <chrisw@osdl.org>
  48  */
  49
  50 #include <linux/kernel.h>
  51 #include <linux/module.h>
  52 #include <linux/init.h>
  53 #include <linux/types.h>
  54 #include <linux/string.h>
  55 #include <linux/list.h>
  56 #include <linux/mutex.h>
  57 #include <linux/kthread.h>
  58 #include <linux/freezer.h>
  59 #include <linux/delay.h>
  60
  61 #include <linux/nvram.h>
  62 #include <linux/proc_fs.h>
  63 #include <linux/sysfs.h>
  64 #include <linux/backlight.h>
  65 #include <linux/fb.h>
  66 #include <linux/platform_device.h>
  67 #include <linux/hwmon.h>
  68 #include <linux/hwmon-sysfs.h>
  69 #include <linux/input.h>
  70 #include <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 hotkey_tablet:1;
 225         u32 light:1;
 226         u32 light_status:1;
 227         u32 bright_16levels:1;
 228         u32 wan:1;
 229         u32 fan_ctrl_status_undef:1;
 230         u32 input_device_registered:1;
 231         u32 platform_drv_registered:1;
 232         u32 platform_drv_attrs_registered:1;
 233         u32 sensors_pdrv_registered:1;
 234         u32 sensors_pdrv_attrs_registered:1;
 235         u32 sensors_pdev_attrs_registered:1;
 236         u32 hotkey_poll_active:1;
 237 } tp_features;
 238
 239 struct thinkpad_id_data {
 240         unsigned int vendor;    /* ThinkPad vendor:
 241                                  * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */
 242
 243         char *bios_version_str; /* Something like 1ZET51WW (1.03z) */
 244         char *ec_version_str;   /* Something like 1ZHT51WW-1.04a */
 245
 246         u16 bios_model;         /* Big Endian, TP-1Y = 0x5931, 0 = unknown */
 247         u16 ec_model;
 248
 249         char *model_str;
 250 };
 251 static struct thinkpad_id_data thinkpad_id;
 252
 253 static enum {
 254         TPACPI_LIFE_INIT = 0,
 255         TPACPI_LIFE_RUNNING,
 256         TPACPI_LIFE_EXITING,
 257 } tpacpi_lifecycle;
 258
 259 static int experimental;
 260 static u32 dbg_level;
 261
 262 /****************************************************************************
 263  ****************************************************************************
 264  *
 265  * ACPI Helpers and device model
 266  *
 267  ****************************************************************************
 268  ****************************************************************************/
 269
 270 /*************************************************************************
 271  * ACPI basic handles
 272  */
 273
 274 static acpi_handle root_handle;
 275
 276 #define TPACPI_HANDLE(object, parent, paths...)                 \
 277         static acpi_handle  object##_handle;                    \
 278         static acpi_handle *object##_parent = &parent##_handle; \
 279         static char        *object##_path;                      \
 280         static char        *object##_paths[] = { paths }
 281
 282 TPACPI_HANDLE(ec, root, "\\_SB.PCI0.ISA.EC0",   /* 240, 240x */
 283            "\\_SB.PCI.ISA.EC",  /* 570 */
 284            "\\_SB.PCI0.ISA0.EC0",       /* 600e/x, 770e, 770x */
 285            "\\_SB.PCI0.ISA.EC", /* A21e, A2xm/p, T20-22, X20-21 */
 286            "\\_SB.PCI0.AD4S.EC0",       /* i1400, R30 */
 287            "\\_SB.PCI0.ICH3.EC0",       /* R31 */
 288            "\\_SB.PCI0.LPC.EC", /* all others */
 289            );
 290
 291 TPACPI_HANDLE(ecrd, ec, "ECRD");        /* 570 */
 292 TPACPI_HANDLE(ecwr, ec, "ECWR");        /* 570 */
 293
 294 TPACPI_HANDLE(cmos, root, "\\UCMS",     /* R50, R50e, R50p, R51, */
 295                                         /* T4x, X31, X40 */
 296            "\\CMOS",            /* A3x, G4x, R32, T23, T30, X22-24, X30 */
 297            "\\CMS",             /* R40, R40e */
 298            );                   /* all others */
 299
 300 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY",   /* 600e/x, 770e, 770x */
 301            "^HKEY",             /* R30, R31 */
 302            "HKEY",              /* all others */
 303            );                   /* 570 */
 304
 305 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA",   /* 570 */
 306            "\\_SB.PCI0.AGP0.VID0",      /* 600e/x, 770x */
 307            "\\_SB.PCI0.VID0",   /* 770e */
 308            "\\_SB.PCI0.VID",    /* A21e, G4x, R50e, X30, X40 */
 309            "\\_SB.PCI0.AGP.VID",        /* all others */
 310            );                           /* R30, R31 */
 311
 312
 313 /*************************************************************************
 314  * ACPI helpers
 315  */
 316
 317 static int acpi_evalf(acpi_handle handle,
 318                       void *res, char *method, char *fmt, ...)
 319 {
 320         char *fmt0 = fmt;
 321         struct acpi_object_list params;
 322         union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS];
 323         struct acpi_buffer result, *resultp;
 324         union acpi_object out_obj;
 325         acpi_status status;
 326         va_list ap;
 327         char res_type;
 328         int success;
 329         int quiet;
 330
 331         if (!*fmt) {
 332                 printk(TPACPI_ERR "acpi_evalf() called with empty format\n");
 333                 return 0;
 334         }
 335
 336         if (*fmt == 'q') {
 337                 quiet = 1;
 338                 fmt++;
 339         } else
 340                 quiet = 0;
 341
 342         res_type = *(fmt++);
 343
 344         params.count = 0;
 345         params.pointer = &in_objs[0];
 346
 347         va_start(ap, fmt);
 348         while (*fmt) {
 349                 char c = *(fmt++);
 350                 switch (c) {
 351                 case 'd':       /* int */
 352                         in_objs[params.count].integer.value = va_arg(ap, int);
 353                         in_objs[params.count++].type = ACPI_TYPE_INTEGER;
 354                         break;
 355                         /* add more types as needed */
 356                 default:
 357                         printk(TPACPI_ERR "acpi_evalf() called "
 358                                "with invalid format character '%c'\n", c);
 359                         return 0;
 360                 }
 361         }
 362         va_end(ap);
 363
 364         if (res_type != 'v') {
 365                 result.length = sizeof(out_obj);
 366                 result.pointer = &out_obj;
 367                 resultp = &result;
 368         } else
 369                 resultp = NULL;
 370
 371         status = acpi_evaluate_object(handle, method, &params, resultp);
 372
 373         switch (res_type) {
 374         case 'd':               /* int */
 375                 if (res)
 376                         *(int *)res = out_obj.integer.value;
 377                 success = status == AE_OK && out_obj.type == ACPI_TYPE_INTEGER;
 378                 break;
 379         case 'v':               /* void */
 380                 success = status == AE_OK;
 381                 break;
 382                 /* add more types as needed */
 383         default:
 384                 printk(TPACPI_ERR "acpi_evalf() called "
 385                        "with invalid format character '%c'\n", res_type);
 386                 return 0;
 387         }
 388
 389         if (!success && !quiet)
 390                 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %d\n",
 391                        method, fmt0, status);
 392
 393         return success;
 394 }
 395
 396 static int acpi_ec_read(int i, u8 *p)
 397 {
 398         int v;
 399
 400         if (ecrd_handle) {
 401                 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i))
 402                         return 0;
 403                 *p = v;
 404         } else {
 405                 if (ec_read(i, p) < 0)
 406                         return 0;
 407         }
 408
 409         return 1;
 410 }
 411
 412 static int acpi_ec_write(int i, u8 v)
 413 {
 414         if (ecwr_handle) {
 415                 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v))
 416                         return 0;
 417         } else {
 418                 if (ec_write(i, v) < 0)
 419                         return 0;
 420         }
 421
 422         return 1;
 423 }
 424
 425 #if defined(CONFIG_THINKPAD_ACPI_DOCK) || defined(CONFIG_THINKPAD_ACPI_BAY)
 426 static int _sta(acpi_handle handle)
 427 {
 428         int status;
 429
 430         if (!handle || !acpi_evalf(handle, &status, "_STA", "d"))
 431                 status = 0;
 432
 433         return status;
 434 }
 435 #endif
 436
 437 static int issue_thinkpad_cmos_command(int cmos_cmd)
 438 {
 439         if (!cmos_handle)
 440                 return -ENXIO;
 441
 442         if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd))
 443                 return -EIO;
 444
 445         return 0;
 446 }
 447
 448 /*************************************************************************
 449  * ACPI device model
 450  */
 451
 452 #define TPACPI_ACPIHANDLE_INIT(object) \
 453         drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \
 454                 object##_paths, ARRAY_SIZE(object##_paths), &object##_path)
 455
 456 static void drv_acpi_handle_init(char *name,
 457                            acpi_handle *handle, acpi_handle parent,
 458                            char **paths, int num_paths, char **path)
 459 {
 460         int i;
 461         acpi_status status;
 462
 463         vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n",
 464                 name);
 465
 466         for (i = 0; i < num_paths; i++) {
 467                 status = acpi_get_handle(parent, paths[i], handle);
 468                 if (ACPI_SUCCESS(status)) {
 469                         *path = paths[i];
 470                         dbg_printk(TPACPI_DBG_INIT,
 471                                    "Found ACPI handle %s for %s\n",
 472                                    *path, name);
 473                         return;
 474                 }
 475         }
 476
 477         vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n",
 478                     name);
 479         *handle = NULL;
 480 }
 481
 482 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data)
 483 {
 484         struct ibm_struct *ibm = data;
 485
 486         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
 487                 return;
 488
 489         if (!ibm || !ibm->acpi || !ibm->acpi->notify)
 490                 return;
 491
 492         ibm->acpi->notify(ibm, event);
 493 }
 494
 495 static int __init setup_acpi_notify(struct ibm_struct *ibm)
 496 {
 497         acpi_status status;
 498         int rc;
 499
 500         BUG_ON(!ibm->acpi);
 501
 502         if (!*ibm->acpi->handle)
 503                 return 0;
 504
 505         vdbg_printk(TPACPI_DBG_INIT,
 506                 "setting up ACPI notify for %s\n", ibm->name);
 507
 508         rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device);
 509         if (rc < 0) {
 510                 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n",
 511                         ibm->name, rc);
 512                 return -ENODEV;
 513         }
 514
 515         acpi_driver_data(ibm->acpi->device) = ibm;
 516         sprintf(acpi_device_class(ibm->acpi->device), "%s/%s",
 517                 TPACPI_ACPI_EVENT_PREFIX,
 518                 ibm->name);
 519
 520         status = acpi_install_notify_handler(*ibm->acpi->handle,
 521                         ibm->acpi->type, dispatch_acpi_notify, ibm);
 522         if (ACPI_FAILURE(status)) {
 523                 if (status == AE_ALREADY_EXISTS) {
 524                         printk(TPACPI_NOTICE
 525                                "another device driver is already "
 526                                "handling %s events\n", ibm->name);
 527                 } else {
 528                         printk(TPACPI_ERR
 529                                "acpi_install_notify_handler(%s) failed: %d\n",
 530                                ibm->name, status);
 531                 }
 532                 return -ENODEV;
 533         }
 534         ibm->flags.acpi_notify_installed = 1;
 535         return 0;
 536 }
 537
 538 static int __init tpacpi_device_add(struct acpi_device *device)
 539 {
 540         return 0;
 541 }
 542
 543 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm)
 544 {
 545         int rc;
 546
 547         dbg_printk(TPACPI_DBG_INIT,
 548                 "registering %s as an ACPI driver\n", ibm->name);
 549
 550         BUG_ON(!ibm->acpi);
 551
 552         ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL);
 553         if (!ibm->acpi->driver) {
 554                 printk(TPACPI_ERR "kzalloc(ibm->driver) failed\n");
 555                 return -ENOMEM;
 556         }
 557
 558         sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name);
 559         ibm->acpi->driver->ids = ibm->acpi->hid;
 560
 561         ibm->acpi->driver->ops.add = &tpacpi_device_add;
 562
 563         rc = acpi_bus_register_driver(ibm->acpi->driver);
 564         if (rc < 0) {
 565                 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n",
 566                        ibm->name, rc);
 567                 kfree(ibm->acpi->driver);
 568                 ibm->acpi->driver = NULL;
 569         } else if (!rc)
 570                 ibm->flags.acpi_driver_registered = 1;
 571
 572         return rc;
 573 }
 574
 575
 576 /****************************************************************************
 577  ****************************************************************************
 578  *
 579  * Procfs Helpers
 580  *
 581  ****************************************************************************
 582  ****************************************************************************/
 583
 584 static int dispatch_procfs_read(char *page, char **start, off_t off,
 585                         int count, int *eof, void *data)
 586 {
 587         struct ibm_struct *ibm = data;
 588         int len;
 589
 590         if (!ibm || !ibm->read)
 591                 return -EINVAL;
 592
 593         len = ibm->read(page);
 594         if (len < 0)
 595                 return len;
 596
 597         if (len <= off + count)
 598                 *eof = 1;
 599         *start = page + off;
 600         len -= off;
 601         if (len > count)
 602                 len = count;
 603         if (len < 0)
 604                 len = 0;
 605
 606         return len;
 607 }
 608
 609 static int dispatch_procfs_write(struct file *file,
 610                         const char __user *userbuf,
 611                         unsigned long count, void *data)
 612 {
 613         struct ibm_struct *ibm = data;
 614         char *kernbuf;
 615         int ret;
 616
 617         if (!ibm || !ibm->write)
 618                 return -EINVAL;
 619
 620         kernbuf = kmalloc(count + 2, GFP_KERNEL);
 621         if (!kernbuf)
 622                 return -ENOMEM;
 623
 624         if (copy_from_user(kernbuf, userbuf, count)) {
 625                 kfree(kernbuf);
 626                 return -EFAULT;
 627         }
 628
 629         kernbuf[count] = 0;
 630         strcat(kernbuf, ",");
 631         ret = ibm->write(kernbuf);
 632         if (ret == 0)
 633                 ret = count;
 634
 635         kfree(kernbuf);
 636
 637         return ret;
 638 }
 639
 640 static char *next_cmd(char **cmds)
 641 {
 642         char *start = *cmds;
 643         char *end;
 644
 645         while ((end = strchr(start, ',')) && end == start)
 646                 start = end + 1;
 647
 648         if (!end)
 649                 return NULL;
 650
 651         *end = 0;
 652         *cmds = end + 1;
 653         return start;
 654 }
 655
 656
 657 /****************************************************************************
 658  ****************************************************************************
 659  *
 660  * Device model: input, hwmon and platform
 661  *
 662  ****************************************************************************
 663  ****************************************************************************/
 664
 665 static struct platform_device *tpacpi_pdev;
 666 static struct platform_device *tpacpi_sensors_pdev;
 667 static struct device *tpacpi_hwmon;
 668 static struct input_dev *tpacpi_inputdev;
 669 static struct mutex tpacpi_inputdev_send_mutex;
 670 static LIST_HEAD(tpacpi_all_drivers);
 671
 672 static int tpacpi_suspend_handler(struct platform_device *pdev,
 673                                   pm_message_t state)
 674 {
 675         struct ibm_struct *ibm, *itmp;
 676
 677         list_for_each_entry_safe(ibm, itmp,
 678                                  &tpacpi_all_drivers,
 679                                  all_drivers) {
 680                 if (ibm->suspend)
 681                         (ibm->suspend)(state);
 682         }
 683
 684         return 0;
 685 }
 686
 687 static int tpacpi_resume_handler(struct platform_device *pdev)
 688 {
 689         struct ibm_struct *ibm, *itmp;
 690
 691         list_for_each_entry_safe(ibm, itmp,
 692                                  &tpacpi_all_drivers,
 693                                  all_drivers) {
 694                 if (ibm->resume)
 695                         (ibm->resume)();
 696         }
 697
 698         return 0;
 699 }
 700
 701 static struct platform_driver tpacpi_pdriver = {
 702         .driver = {
 703                 .name = TPACPI_DRVR_NAME,
 704                 .owner = THIS_MODULE,
 705         },
 706         .suspend = tpacpi_suspend_handler,
 707         .resume = tpacpi_resume_handler,
 708 };
 709
 710 static struct platform_driver tpacpi_hwmon_pdriver = {
 711         .driver = {
 712                 .name = TPACPI_HWMON_DRVR_NAME,
 713                 .owner = THIS_MODULE,
 714         },
 715 };
 716
 717 /*************************************************************************
 718  * sysfs support helpers
 719  */
 720
 721 struct attribute_set {
 722         unsigned int members, max_members;
 723         struct attribute_group group;
 724 };
 725
 726 struct attribute_set_obj {
 727         struct attribute_set s;
 728         struct attribute *a;
 729 } __attribute__((packed));
 730
 731 static struct attribute_set *create_attr_set(unsigned int max_members,
 732                                                 const char *name)
 733 {
 734         struct attribute_set_obj *sobj;
 735
 736         if (max_members == 0)
 737                 return NULL;
 738
 739         /* Allocates space for implicit NULL at the end too */
 740         sobj = kzalloc(sizeof(struct attribute_set_obj) +
 741                     max_members * sizeof(struct attribute *),
 742                     GFP_KERNEL);
 743         if (!sobj)
 744                 return NULL;
 745         sobj->s.max_members = max_members;
 746         sobj->s.group.attrs = &sobj->a;
 747         sobj->s.group.name = name;
 748
 749         return &sobj->s;
 750 }
 751
 752 #define destroy_attr_set(_set) \
 753         kfree(_set);
 754
 755 /* not multi-threaded safe, use it in a single thread per set */
 756 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr)
 757 {
 758         if (!s || !attr)
 759                 return -EINVAL;
 760
 761         if (s->members >= s->max_members)
 762                 return -ENOMEM;
 763
 764         s->group.attrs[s->members] = attr;
 765         s->members++;
 766
 767         return 0;
 768 }
 769
 770 static int add_many_to_attr_set(struct attribute_set *s,
 771                         struct attribute **attr,
 772                         unsigned int count)
 773 {
 774         int i, res;
 775
 776         for (i = 0; i < count; i++) {
 777                 res = add_to_attr_set(s, attr[i]);
 778                 if (res)
 779                         return res;
 780         }
 781
 782         return 0;
 783 }
 784
 785 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj)
 786 {
 787         sysfs_remove_group(kobj, &s->group);
 788         destroy_attr_set(s);
 789 }
 790
 791 #define register_attr_set_with_sysfs(_attr_set, _kobj) \
 792         sysfs_create_group(_kobj, &_attr_set->group)
 793
 794 static int parse_strtoul(const char *buf,
 795                 unsigned long max, unsigned long *value)
 796 {
 797         char *endp;
 798
 799         while (*buf && isspace(*buf))
 800                 buf++;
 801         *value = simple_strtoul(buf, &endp, 0);
 802         while (*endp && isspace(*endp))
 803                 endp++;
 804         if (*endp || *value > max)
 805                 return -EINVAL;
 806
 807         return 0;
 808 }
 809
 810 /*************************************************************************
 811  * thinkpad-acpi driver attributes
 812  */
 813
 814 /* interface_version --------------------------------------------------- */
 815 static ssize_t tpacpi_driver_interface_version_show(
 816                                 struct device_driver *drv,
 817                                 char *buf)
 818 {
 819         return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION);
 820 }
 821
 822 static DRIVER_ATTR(interface_version, S_IRUGO,
 823                 tpacpi_driver_interface_version_show, NULL);
 824
 825 /* debug_level --------------------------------------------------------- */
 826 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv,
 827                                                 char *buf)
 828 {
 829         return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level);
 830 }
 831
 832 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv,
 833                                                 const char *buf, size_t count)
 834 {
 835         unsigned long t;
 836
 837         if (parse_strtoul(buf, 0xffff, &t))
 838                 return -EINVAL;
 839
 840         dbg_level = t;
 841
 842         return count;
 843 }
 844
 845 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO,
 846                 tpacpi_driver_debug_show, tpacpi_driver_debug_store);
 847
 848 /* version ------------------------------------------------------------- */
 849 static ssize_t tpacpi_driver_version_show(struct device_driver *drv,
 850                                                 char *buf)
 851 {
 852         return snprintf(buf, PAGE_SIZE, "%s v%s\n",
 853                         TPACPI_DESC, TPACPI_VERSION);
 854 }
 855
 856 static DRIVER_ATTR(version, S_IRUGO,
 857                 tpacpi_driver_version_show, NULL);
 858
 859 /* --------------------------------------------------------------------- */
 860
 861 static struct driver_attribute *tpacpi_driver_attributes[] = {
 862         &driver_attr_debug_level, &driver_attr_version,
 863         &driver_attr_interface_version,
 864 };
 865
 866 static int __init tpacpi_create_driver_attributes(struct device_driver *drv)
 867 {
 868         int i, res;
 869
 870         i = 0;
 871         res = 0;
 872         while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) {
 873                 res = driver_create_file(drv, tpacpi_driver_attributes[i]);
 874                 i++;
 875         }
 876
 877         return res;
 878 }
 879
 880 static void tpacpi_remove_driver_attributes(struct device_driver *drv)
 881 {
 882         int i;
 883
 884         for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++)
 885                 driver_remove_file(drv, tpacpi_driver_attributes[i]);
 886 }
 887
 888 /****************************************************************************
 889  ****************************************************************************
 890  *
 891  * Subdrivers
 892  *
 893  ****************************************************************************
 894  ****************************************************************************/
 895
 896 /*************************************************************************
 897  * thinkpad-acpi init subdriver
 898  */
 899
 900 static int __init thinkpad_acpi_driver_init(struct ibm_init_struct *iibm)
 901 {
 902         printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION);
 903         printk(TPACPI_INFO "%s\n", TPACPI_URL);
 904
 905         printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n",
 906                 (thinkpad_id.bios_version_str) ?
 907                         thinkpad_id.bios_version_str : "unknown",
 908                 (thinkpad_id.ec_version_str) ?
 909                         thinkpad_id.ec_version_str : "unknown");
 910
 911         if (thinkpad_id.vendor && thinkpad_id.model_str)
 912                 printk(TPACPI_INFO "%s %s\n",
 913                         (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ?
 914                                 "IBM" : ((thinkpad_id.vendor ==
 915                                                 PCI_VENDOR_ID_LENOVO) ?
 916                                         "Lenovo" : "Unknown vendor"),
 917                         thinkpad_id.model_str);
 918
 919         return 0;
 920 }
 921
 922 static int thinkpad_acpi_driver_read(char *p)
 923 {
 924         int len = 0;
 925
 926         len += sprintf(p + len, "driver:\t\t%s\n", TPACPI_DESC);
 927         len += sprintf(p + len, "version:\t%s\n", TPACPI_VERSION);
 928
 929         return len;
 930 }
 931
 932 static struct ibm_struct thinkpad_acpi_driver_data = {
 933         .name = "driver",
 934         .read = thinkpad_acpi_driver_read,
 935 };
 936
 937 /*************************************************************************
 938  * Hotkey subdriver
 939  */
 940
 941 enum {  /* hot key scan codes (derived from ACPI DSDT) */
 942         TP_ACPI_HOTKEYSCAN_FNF1         = 0,
 943         TP_ACPI_HOTKEYSCAN_FNF2,
 944         TP_ACPI_HOTKEYSCAN_FNF3,
 945         TP_ACPI_HOTKEYSCAN_FNF4,
 946         TP_ACPI_HOTKEYSCAN_FNF5,
 947         TP_ACPI_HOTKEYSCAN_FNF6,
 948         TP_ACPI_HOTKEYSCAN_FNF7,
 949         TP_ACPI_HOTKEYSCAN_FNF8,
 950         TP_ACPI_HOTKEYSCAN_FNF9,
 951         TP_ACPI_HOTKEYSCAN_FNF10,
 952         TP_ACPI_HOTKEYSCAN_FNF11,
 953         TP_ACPI_HOTKEYSCAN_FNF12,
 954         TP_ACPI_HOTKEYSCAN_FNBACKSPACE,
 955         TP_ACPI_HOTKEYSCAN_FNINSERT,
 956         TP_ACPI_HOTKEYSCAN_FNDELETE,
 957         TP_ACPI_HOTKEYSCAN_FNHOME,
 958         TP_ACPI_HOTKEYSCAN_FNEND,
 959         TP_ACPI_HOTKEYSCAN_FNPAGEUP,
 960         TP_ACPI_HOTKEYSCAN_FNPAGEDOWN,
 961         TP_ACPI_HOTKEYSCAN_FNSPACE,
 962         TP_ACPI_HOTKEYSCAN_VOLUMEUP,
 963         TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
 964         TP_ACPI_HOTKEYSCAN_MUTE,
 965         TP_ACPI_HOTKEYSCAN_THINKPAD,
 966 };
 967
 968 enum {  /* Keys available through NVRAM polling */
 969         TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U,
 970         TPACPI_HKEY_NVRAM_GOOD_MASK  = 0x00fb8000U,
 971 };
 972
 973 enum {  /* Positions of some of the keys in hotkey masks */
 974         TP_ACPI_HKEY_DISPSWTCH_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF7,
 975         TP_ACPI_HKEY_DISPXPAND_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF8,
 976         TP_ACPI_HKEY_HIBERNATE_MASK     = 1 << TP_ACPI_HOTKEYSCAN_FNF12,
 977         TP_ACPI_HKEY_BRGHTUP_MASK       = 1 << TP_ACPI_HOTKEYSCAN_FNHOME,
 978         TP_ACPI_HKEY_BRGHTDWN_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNEND,
 979         TP_ACPI_HKEY_THNKLGHT_MASK      = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP,
 980         TP_ACPI_HKEY_ZOOM_MASK          = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE,
 981         TP_ACPI_HKEY_VOLUP_MASK         = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP,
 982         TP_ACPI_HKEY_VOLDWN_MASK        = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN,
 983         TP_ACPI_HKEY_MUTE_MASK          = 1 << TP_ACPI_HOTKEYSCAN_MUTE,
 984         TP_ACPI_HKEY_THINKPAD_MASK      = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD,
 985 };
 986
 987 enum {  /* NVRAM to ACPI HKEY group map */
 988         TP_NVRAM_HKEY_GROUP_HK2         = TP_ACPI_HKEY_THINKPAD_MASK |
 989                                           TP_ACPI_HKEY_ZOOM_MASK |
 990                                           TP_ACPI_HKEY_DISPSWTCH_MASK |
 991                                           TP_ACPI_HKEY_HIBERNATE_MASK,
 992         TP_NVRAM_HKEY_GROUP_BRIGHTNESS  = TP_ACPI_HKEY_BRGHTUP_MASK |
 993                                           TP_ACPI_HKEY_BRGHTDWN_MASK,
 994         TP_NVRAM_HKEY_GROUP_VOLUME      = TP_ACPI_HKEY_VOLUP_MASK |
 995                                           TP_ACPI_HKEY_VOLDWN_MASK |
 996                                           TP_ACPI_HKEY_MUTE_MASK,
 997 };
 998
 999 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1000 struct tp_nvram_state {
1001        u16 thinkpad_toggle:1;
1002        u16 zoom_toggle:1;
1003        u16 display_toggle:1;
1004        u16 thinklight_toggle:1;
1005        u16 hibernate_toggle:1;
1006        u16 displayexp_toggle:1;
1007        u16 display_state:1;
1008        u16 brightness_toggle:1;
1009        u16 volume_toggle:1;
1010        u16 mute:1;
1011
1012        u8 brightness_level;
1013        u8 volume_level;
1014 };
1015
1016 static struct task_struct *tpacpi_hotkey_task;
1017 static u32 hotkey_source_mask;          /* bit mask 0=ACPI,1=NVRAM */
1018 static int hotkey_poll_freq = 10;       /* Hz */
1019 static struct mutex hotkey_thread_mutex;
1020 static struct mutex hotkey_thread_data_mutex;
1021 static unsigned int hotkey_config_change;
1022
1023 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1024
1025 #define hotkey_source_mask 0U
1026
1027 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1028
1029 static struct mutex hotkey_mutex;
1030
1031 static enum {   /* Reasons for waking up */
1032         TP_ACPI_WAKEUP_NONE = 0,        /* None or unknown */
1033         TP_ACPI_WAKEUP_BAYEJ,           /* Bay ejection request */
1034         TP_ACPI_WAKEUP_UNDOCK,          /* Undock request */
1035 } hotkey_wakeup_reason;
1036
1037 static int hotkey_autosleep_ack;
1038
1039 static int hotkey_orig_status;
1040 static u32 hotkey_orig_mask;
1041 static u32 hotkey_all_mask;
1042 static u32 hotkey_reserved_mask;
1043 static u32 hotkey_mask;
1044
1045 static unsigned int hotkey_report_mode;
1046
1047 static u16 *hotkey_keycode_map;
1048
1049 static struct attribute_set *hotkey_dev_attributes;
1050
1051 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1052 #define HOTKEY_CONFIG_CRITICAL_START \
1053         do { \
1054                 mutex_lock(&hotkey_thread_data_mutex); \
1055                 hotkey_config_change++; \
1056         } while (0);
1057 #define HOTKEY_CONFIG_CRITICAL_END \
1058         mutex_unlock(&hotkey_thread_data_mutex);
1059 #else
1060 #define HOTKEY_CONFIG_CRITICAL_START
1061 #define HOTKEY_CONFIG_CRITICAL_END
1062 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1063
1064 /* HKEY.MHKG() return bits */
1065 #define TP_HOTKEY_TABLET_MASK (1 << 3)
1066
1067 static int hotkey_get_wlsw(int *status)
1068 {
1069         if (!acpi_evalf(hkey_handle, status, "WLSW", "d"))
1070                 return -EIO;
1071         return 0;
1072 }
1073
1074 static int hotkey_get_tablet_mode(int *status)
1075 {
1076         int s;
1077
1078         if (!acpi_evalf(hkey_handle, &s, "MHKG", "d"))
1079                 return -EIO;
1080
1081         *status = ((s & TP_HOTKEY_TABLET_MASK) != 0);
1082         return 0;
1083 }
1084
1085 /*
1086  * Call with hotkey_mutex held
1087  */
1088 static int hotkey_mask_get(void)
1089 {
1090         u32 m = 0;
1091
1092         if (tp_features.hotkey_mask) {
1093                 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d"))
1094                         return -EIO;
1095         }
1096         hotkey_mask = m | (hotkey_source_mask & hotkey_mask);
1097
1098         return 0;
1099 }
1100
1101 /*
1102  * Call with hotkey_mutex held
1103  */
1104 static int hotkey_mask_set(u32 mask)
1105 {
1106         int i;
1107         int rc = 0;
1108
1109         if (tp_features.hotkey_mask) {
1110                 HOTKEY_CONFIG_CRITICAL_START
1111                 for (i = 0; i < 32; i++) {
1112                         u32 m = 1 << i;
1113                         /* enable in firmware mask only keys not in NVRAM
1114                          * mode, but enable the key in the cached hotkey_mask
1115                          * regardless of mode, or the key will end up
1116                          * disabled by hotkey_mask_get() */
1117                         if (!acpi_evalf(hkey_handle,
1118                                         NULL, "MHKM", "vdd", i + 1,
1119                                         !!((mask & ~hotkey_source_mask) & m))) {
1120                                 rc = -EIO;
1121                                 break;
1122                         } else {
1123                                 hotkey_mask = (hotkey_mask & ~m) | (mask & m);
1124                         }
1125                 }
1126                 HOTKEY_CONFIG_CRITICAL_END
1127
1128                 /* hotkey_mask_get must be called unconditionally below */
1129                 if (!hotkey_mask_get() && !rc &&
1130                     (hotkey_mask & ~hotkey_source_mask) !=
1131                      (mask & ~hotkey_source_mask)) {
1132                         printk(TPACPI_NOTICE
1133                                "requested hot key mask 0x%08x, but "
1134                                "firmware forced it to 0x%08x\n",
1135                                mask, hotkey_mask);
1136                 }
1137         } else {
1138 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1139                 HOTKEY_CONFIG_CRITICAL_START
1140                 hotkey_mask = mask & hotkey_source_mask;
1141                 HOTKEY_CONFIG_CRITICAL_END
1142                 hotkey_mask_get();
1143                 if (hotkey_mask != mask) {
1144                         printk(TPACPI_NOTICE
1145                                "requested hot key mask 0x%08x, "
1146                                "forced to 0x%08x (NVRAM poll mask is "
1147                                "0x%08x): no firmware mask support\n",
1148                                mask, hotkey_mask, hotkey_source_mask);
1149                 }
1150 #else
1151                 hotkey_mask_get();
1152                 rc = -ENXIO;
1153 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1154         }
1155
1156         return rc;
1157 }
1158
1159 static int hotkey_status_get(int *status)
1160 {
1161         if (!acpi_evalf(hkey_handle, status, "DHKC", "d"))
1162                 return -EIO;
1163
1164         return 0;
1165 }
1166
1167 static int hotkey_status_set(int status)
1168 {
1169         if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", status))
1170                 return -EIO;
1171
1172         return 0;
1173 }
1174
1175 static void tpacpi_input_send_radiosw(void)
1176 {
1177         int wlsw;
1178
1179         if (tp_features.hotkey_wlsw && !hotkey_get_wlsw(&wlsw)) {
1180                 mutex_lock(&tpacpi_inputdev_send_mutex);
1181
1182                 input_report_switch(tpacpi_inputdev,
1183                                     SW_RADIO, !!wlsw);
1184                 input_sync(tpacpi_inputdev);
1185
1186                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1187         }
1188 }
1189
1190 static void tpacpi_input_send_tabletsw(void)
1191 {
1192         int state;
1193
1194         if (tp_features.hotkey_tablet &&
1195             !hotkey_get_tablet_mode(&state)) {
1196                 mutex_lock(&tpacpi_inputdev_send_mutex);
1197
1198                 input_report_switch(tpacpi_inputdev,
1199                                     SW_TABLET_MODE, !!state);
1200                 input_sync(tpacpi_inputdev);
1201
1202                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1203         }
1204 }
1205
1206 static void tpacpi_input_send_key(unsigned int scancode)
1207 {
1208         unsigned int keycode;
1209
1210         keycode = hotkey_keycode_map[scancode];
1211
1212         if (keycode != KEY_RESERVED) {
1213                 mutex_lock(&tpacpi_inputdev_send_mutex);
1214
1215                 input_report_key(tpacpi_inputdev, keycode, 1);
1216                 if (keycode == KEY_UNKNOWN)
1217                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1218                                     scancode);
1219                 input_sync(tpacpi_inputdev);
1220
1221                 input_report_key(tpacpi_inputdev, keycode, 0);
1222                 if (keycode == KEY_UNKNOWN)
1223                         input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN,
1224                                     scancode);
1225                 input_sync(tpacpi_inputdev);
1226
1227                 mutex_unlock(&tpacpi_inputdev_send_mutex);
1228         }
1229 }
1230
1231 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1232 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver;
1233
1234 static void tpacpi_hotkey_send_key(unsigned int scancode)
1235 {
1236         tpacpi_input_send_key(scancode);
1237         if (hotkey_report_mode < 2) {
1238                 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device,
1239                                                 0x80, 0x1001 + scancode);
1240         }
1241 }
1242
1243 static void hotkey_read_nvram(struct tp_nvram_state *n, u32 m)
1244 {
1245         u8 d;
1246
1247         if (m & TP_NVRAM_HKEY_GROUP_HK2) {
1248                 d = nvram_read_byte(TP_NVRAM_ADDR_HK2);
1249                 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD);
1250                 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM);
1251                 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY);
1252                 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE);
1253         }
1254         if (m & TP_ACPI_HKEY_THNKLGHT_MASK) {
1255                 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT);
1256                 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT);
1257         }
1258         if (m & TP_ACPI_HKEY_DISPXPAND_MASK) {
1259                 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO);
1260                 n->displayexp_toggle =
1261                                 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND);
1262         }
1263         if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) {
1264                 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS);
1265                 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
1266                                 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
1267                 n->brightness_toggle =
1268                                 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS);
1269         }
1270         if (m & TP_NVRAM_HKEY_GROUP_VOLUME) {
1271                 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER);
1272                 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME)
1273                                 >> TP_NVRAM_POS_LEVEL_VOLUME;
1274                 n->mute = !!(d & TP_NVRAM_MASK_MUTE);
1275                 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME);
1276         }
1277 }
1278
1279 #define TPACPI_COMPARE_KEY(__scancode, __member) \
1280         do { \
1281                 if ((mask & (1 << __scancode)) && \
1282                     oldn->__member != newn->__member) \
1283                 tpacpi_hotkey_send_key(__scancode); \
1284         } while (0)
1285
1286 #define TPACPI_MAY_SEND_KEY(__scancode) \
1287         do { if (mask & (1 << __scancode)) \
1288                 tpacpi_hotkey_send_key(__scancode); } while (0)
1289
1290 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
1291                                            struct tp_nvram_state *newn,
1292                                            u32 mask)
1293 {
1294         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle);
1295         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle);
1296         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle);
1297         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle);
1298
1299         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle);
1300
1301         TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle);
1302
1303         /* handle volume */
1304         if (oldn->volume_toggle != newn->volume_toggle) {
1305                 if (oldn->mute != newn->mute) {
1306                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1307                 }
1308                 if (oldn->volume_level > newn->volume_level) {
1309                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1310                 } else if (oldn->volume_level < newn->volume_level) {
1311                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1312                 } else if (oldn->mute == newn->mute) {
1313                         /* repeated key presses that didn't change state */
1314                         if (newn->mute) {
1315                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE);
1316                         } else if (newn->volume_level != 0) {
1317                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP);
1318                         } else {
1319                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN);
1320                         }
1321                 }
1322         }
1323
1324         /* handle brightness */
1325         if (oldn->brightness_toggle != newn->brightness_toggle) {
1326                 if (oldn->brightness_level < newn->brightness_level) {
1327                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1328                 } else if (oldn->brightness_level > newn->brightness_level) {
1329                         TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1330                 } else {
1331                         /* repeated key presses that didn't change state */
1332                         if (newn->brightness_level != 0) {
1333                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME);
1334                         } else {
1335                                 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND);
1336                         }
1337                 }
1338         }
1339 }
1340
1341 #undef TPACPI_COMPARE_KEY
1342 #undef TPACPI_MAY_SEND_KEY
1343
1344 static int hotkey_kthread(void *data)
1345 {
1346         struct tp_nvram_state s[2];
1347         u32 mask;
1348         unsigned int si, so;
1349         unsigned long t;
1350         unsigned int change_detector, must_reset;
1351
1352         mutex_lock(&hotkey_thread_mutex);
1353
1354         if (tpacpi_lifecycle == TPACPI_LIFE_EXITING)
1355                 goto exit;
1356
1357         set_freezable();
1358
1359         so = 0;
1360         si = 1;
1361         t = 0;
1362
1363         /* Initial state for compares */
1364         mutex_lock(&hotkey_thread_data_mutex);
1365         change_detector = hotkey_config_change;
1366         mask = hotkey_source_mask & hotkey_mask;
1367         mutex_unlock(&hotkey_thread_data_mutex);
1368         hotkey_read_nvram(&s[so], mask);
1369
1370         while (!kthread_should_stop() && hotkey_poll_freq) {
1371                 if (t == 0)
1372                         t = 1000/hotkey_poll_freq;
1373                 t = msleep_interruptible(t);
1374                 if (unlikely(kthread_should_stop()))
1375                         break;
1376                 must_reset = try_to_freeze();
1377                 if (t > 0 && !must_reset)
1378                         continue;
1379
1380                 mutex_lock(&hotkey_thread_data_mutex);
1381                 if (must_reset || hotkey_config_change != change_detector) {
1382                         /* forget old state on thaw or config change */
1383                         si = so;
1384                         t = 0;
1385                         change_detector = hotkey_config_change;
1386                 }
1387                 mask = hotkey_source_mask & hotkey_mask;
1388                 mutex_unlock(&hotkey_thread_data_mutex);
1389
1390                 if (likely(mask)) {
1391                         hotkey_read_nvram(&s[si], mask);
1392                         if (likely(si != so)) {
1393                                 hotkey_compare_and_issue_event(&s[so], &s[si],
1394                                                                 mask);
1395                         }
1396                 }
1397
1398                 so = si;
1399                 si ^= 1;
1400         }
1401
1402 exit:
1403         mutex_unlock(&hotkey_thread_mutex);
1404         return 0;
1405 }
1406
1407 static void hotkey_poll_stop_sync(void)
1408 {
1409         if (tpacpi_hotkey_task) {
1410                 if (frozen(tpacpi_hotkey_task) ||
1411                     freezing(tpacpi_hotkey_task))
1412                         thaw_process(tpacpi_hotkey_task);
1413
1414                 kthread_stop(tpacpi_hotkey_task);
1415                 tpacpi_hotkey_task = NULL;
1416                 mutex_lock(&hotkey_thread_mutex);
1417                 /* at this point, the thread did exit */
1418                 mutex_unlock(&hotkey_thread_mutex);
1419         }
1420 }
1421
1422 /* call with hotkey_mutex held */
1423 static void hotkey_poll_setup(int may_warn)
1424 {
1425         if ((hotkey_source_mask & hotkey_mask) != 0 &&
1426             hotkey_poll_freq > 0 &&
1427             (tpacpi_inputdev->users > 0 || hotkey_report_mode < 2)) {
1428                 if (!tpacpi_hotkey_task) {
1429                         tpacpi_hotkey_task = kthread_run(hotkey_kthread,
1430                                                          NULL,
1431                                                          TPACPI_FILE "d");
1432                         if (IS_ERR(tpacpi_hotkey_task)) {
1433                                 tpacpi_hotkey_task = NULL;
1434                                 printk(TPACPI_ERR
1435                                        "could not create kernel thread "
1436                                        "for hotkey polling\n");
1437                         }
1438                 }
1439         } else {
1440                 hotkey_poll_stop_sync();
1441                 if (may_warn &&
1442                     hotkey_source_mask != 0 && hotkey_poll_freq == 0) {
1443                         printk(TPACPI_NOTICE
1444                                 "hot keys 0x%08x require polling, "
1445                                 "which is currently disabled\n",
1446                                 hotkey_source_mask);
1447                 }
1448         }
1449 }
1450
1451 static void hotkey_poll_setup_safe(int may_warn)
1452 {
1453         mutex_lock(&hotkey_mutex);
1454         hotkey_poll_setup(may_warn);
1455         mutex_unlock(&hotkey_mutex);
1456 }
1457
1458 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1459
1460 static void hotkey_poll_setup_safe(int __unused)
1461 {
1462 }
1463
1464 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1465
1466 static int hotkey_inputdev_open(struct input_dev *dev)
1467 {
1468         switch (tpacpi_lifecycle) {
1469         case TPACPI_LIFE_INIT:
1470                 /*
1471                  * hotkey_init will call hotkey_poll_setup_safe
1472                  * at the appropriate moment
1473                  */
1474                 return 0;
1475         case TPACPI_LIFE_EXITING:
1476                 return -EBUSY;
1477         case TPACPI_LIFE_RUNNING:
1478                 hotkey_poll_setup_safe(0);
1479                 return 0;
1480         }
1481
1482         /* Should only happen if tpacpi_lifecycle is corrupt */
1483         BUG();
1484         return -EBUSY;
1485 }
1486
1487 static void hotkey_inputdev_close(struct input_dev *dev)
1488 {
1489         /* disable hotkey polling when possible */
1490         if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING)
1491                 hotkey_poll_setup_safe(0);
1492 }
1493
1494 /* sysfs hotkey enable ------------------------------------------------- */
1495 static ssize_t hotkey_enable_show(struct device *dev,
1496                            struct device_attribute *attr,
1497                            char *buf)
1498 {
1499         int res, status;
1500
1501         res = hotkey_status_get(&status);
1502         if (res)
1503                 return res;
1504
1505         return snprintf(buf, PAGE_SIZE, "%d\n", status);
1506 }
1507
1508 static ssize_t hotkey_enable_store(struct device *dev,
1509                             struct device_attribute *attr,
1510                             const char *buf, size_t count)
1511 {
1512         unsigned long t;
1513         int res;
1514
1515         if (parse_strtoul(buf, 1, &t))
1516                 return -EINVAL;
1517
1518         res = hotkey_status_set(t);
1519
1520         return (res) ? res : count;
1521 }
1522
1523 static struct device_attribute dev_attr_hotkey_enable =
1524         __ATTR(hotkey_enable, S_IWUSR | S_IRUGO,
1525                 hotkey_enable_show, hotkey_enable_store);
1526
1527 /* sysfs hotkey mask --------------------------------------------------- */
1528 static ssize_t hotkey_mask_show(struct device *dev,
1529                            struct device_attribute *attr,
1530                            char *buf)
1531 {
1532         int res;
1533
1534         if (mutex_lock_interruptible(&hotkey_mutex))
1535                 return -ERESTARTSYS;
1536         res = hotkey_mask_get();
1537         mutex_unlock(&hotkey_mutex);
1538
1539         return (res)?
1540                 res : snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_mask);
1541 }
1542
1543 static ssize_t hotkey_mask_store(struct device *dev,
1544                             struct device_attribute *attr,
1545                             const char *buf, size_t count)
1546 {
1547         unsigned long t;
1548         int res;
1549
1550         if (parse_strtoul(buf, 0xffffffffUL, &t))
1551                 return -EINVAL;
1552
1553         if (mutex_lock_interruptible(&hotkey_mutex))
1554                 return -ERESTARTSYS;
1555
1556         res = hotkey_mask_set(t);
1557
1558 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1559         hotkey_poll_setup(1);
1560 #endif
1561
1562         mutex_unlock(&hotkey_mutex);
1563
1564         return (res) ? res : count;
1565 }
1566
1567 static struct device_attribute dev_attr_hotkey_mask =
1568         __ATTR(hotkey_mask, S_IWUSR | S_IRUGO,
1569                 hotkey_mask_show, hotkey_mask_store);
1570
1571 /* sysfs hotkey bios_enabled ------------------------------------------- */
1572 static ssize_t hotkey_bios_enabled_show(struct device *dev,
1573                            struct device_attribute *attr,
1574                            char *buf)
1575 {
1576         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_orig_status);
1577 }
1578
1579 static struct device_attribute dev_attr_hotkey_bios_enabled =
1580         __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL);
1581
1582 /* sysfs hotkey bios_mask ---------------------------------------------- */
1583 static ssize_t hotkey_bios_mask_show(struct device *dev,
1584                            struct device_attribute *attr,
1585                            char *buf)
1586 {
1587         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask);
1588 }
1589
1590 static struct device_attribute dev_attr_hotkey_bios_mask =
1591         __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL);
1592
1593 /* sysfs hotkey all_mask ----------------------------------------------- */
1594 static ssize_t hotkey_all_mask_show(struct device *dev,
1595                            struct device_attribute *attr,
1596                            char *buf)
1597 {
1598         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1599                                 hotkey_all_mask | hotkey_source_mask);
1600 }
1601
1602 static struct device_attribute dev_attr_hotkey_all_mask =
1603         __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL);
1604
1605 /* sysfs hotkey recommended_mask --------------------------------------- */
1606 static ssize_t hotkey_recommended_mask_show(struct device *dev,
1607                                             struct device_attribute *attr,
1608                                             char *buf)
1609 {
1610         return snprintf(buf, PAGE_SIZE, "0x%08x\n",
1611                         (hotkey_all_mask | hotkey_source_mask)
1612                         & ~hotkey_reserved_mask);
1613 }
1614
1615 static struct device_attribute dev_attr_hotkey_recommended_mask =
1616         __ATTR(hotkey_recommended_mask, S_IRUGO,
1617                 hotkey_recommended_mask_show, NULL);
1618
1619 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1620
1621 /* sysfs hotkey hotkey_source_mask ------------------------------------- */
1622 static ssize_t hotkey_source_mask_show(struct device *dev,
1623                            struct device_attribute *attr,
1624                            char *buf)
1625 {
1626         return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask);
1627 }
1628
1629 static ssize_t hotkey_source_mask_store(struct device *dev,
1630                             struct device_attribute *attr,
1631                             const char *buf, size_t count)
1632 {
1633         unsigned long t;
1634
1635         if (parse_strtoul(buf, 0xffffffffUL, &t) ||
1636                 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0))
1637                 return -EINVAL;
1638
1639         if (mutex_lock_interruptible(&hotkey_mutex))
1640                 return -ERESTARTSYS;
1641
1642         HOTKEY_CONFIG_CRITICAL_START
1643         hotkey_source_mask = t;
1644         HOTKEY_CONFIG_CRITICAL_END
1645
1646         hotkey_poll_setup(1);
1647
1648         mutex_unlock(&hotkey_mutex);
1649
1650         return count;
1651 }
1652
1653 static struct device_attribute dev_attr_hotkey_source_mask =
1654         __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO,
1655                 hotkey_source_mask_show, hotkey_source_mask_store);
1656
1657 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */
1658 static ssize_t hotkey_poll_freq_show(struct device *dev,
1659                            struct device_attribute *attr,
1660                            char *buf)
1661 {
1662         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq);
1663 }
1664
1665 static ssize_t hotkey_poll_freq_store(struct device *dev,
1666                             struct device_attribute *attr,
1667                             const char *buf, size_t count)
1668 {
1669         unsigned long t;
1670
1671         if (parse_strtoul(buf, 25, &t))
1672                 return -EINVAL;
1673
1674         if (mutex_lock_interruptible(&hotkey_mutex))
1675                 return -ERESTARTSYS;
1676
1677         hotkey_poll_freq = t;
1678
1679         hotkey_poll_setup(1);
1680         mutex_unlock(&hotkey_mutex);
1681
1682         return count;
1683 }
1684
1685 static struct device_attribute dev_attr_hotkey_poll_freq =
1686         __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO,
1687                 hotkey_poll_freq_show, hotkey_poll_freq_store);
1688
1689 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */
1690
1691 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */
1692 static ssize_t hotkey_radio_sw_show(struct device *dev,
1693                            struct device_attribute *attr,
1694                            char *buf)
1695 {
1696         int res, s;
1697         res = hotkey_get_wlsw(&s);
1698         if (res < 0)
1699                 return res;
1700
1701         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1702 }
1703
1704 static struct device_attribute dev_attr_hotkey_radio_sw =
1705         __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL);
1706
1707 static void hotkey_radio_sw_notify_change(void)
1708 {
1709         if (tp_features.hotkey_wlsw)
1710                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1711                              "hotkey_radio_sw");
1712 }
1713
1714 /* sysfs hotkey tablet mode (pollable) --------------------------------- */
1715 static ssize_t hotkey_tablet_mode_show(struct device *dev,
1716                            struct device_attribute *attr,
1717                            char *buf)
1718 {
1719         int res, s;
1720         res = hotkey_get_tablet_mode(&s);
1721         if (res < 0)
1722                 return res;
1723
1724         return snprintf(buf, PAGE_SIZE, "%d\n", !!s);
1725 }
1726
1727 static struct device_attribute dev_attr_hotkey_tablet_mode =
1728         __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL);
1729
1730 static void hotkey_tablet_mode_notify_change(void)
1731 {
1732         if (tp_features.hotkey_tablet)
1733                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1734                              "hotkey_tablet_mode");
1735 }
1736
1737 /* sysfs hotkey report_mode -------------------------------------------- */
1738 static ssize_t hotkey_report_mode_show(struct device *dev,
1739                            struct device_attribute *attr,
1740                            char *buf)
1741 {
1742         return snprintf(buf, PAGE_SIZE, "%d\n",
1743                 (hotkey_report_mode != 0) ? hotkey_report_mode : 1);
1744 }
1745
1746 static struct device_attribute dev_attr_hotkey_report_mode =
1747         __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL);
1748
1749 /* sysfs wakeup reason (pollable) -------------------------------------- */
1750 static ssize_t hotkey_wakeup_reason_show(struct device *dev,
1751                            struct device_attribute *attr,
1752                            char *buf)
1753 {
1754         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason);
1755 }
1756
1757 static struct device_attribute dev_attr_hotkey_wakeup_reason =
1758         __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL);
1759
1760 static void hotkey_wakeup_reason_notify_change(void)
1761 {
1762         if (tp_features.hotkey_mask)
1763                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1764                              "wakeup_reason");
1765 }
1766
1767 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */
1768 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev,
1769                            struct device_attribute *attr,
1770                            char *buf)
1771 {
1772         return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack);
1773 }
1774
1775 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete =
1776         __ATTR(wakeup_hotunplug_complete, S_IRUGO,
1777                hotkey_wakeup_hotunplug_complete_show, NULL);
1778
1779 static void hotkey_wakeup_hotunplug_complete_notify_change(void)
1780 {
1781         if (tp_features.hotkey_mask)
1782                 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL,
1783                              "wakeup_hotunplug_complete");
1784 }
1785
1786 /* --------------------------------------------------------------------- */
1787
1788 static struct attribute *hotkey_attributes[] __initdata = {
1789         &dev_attr_hotkey_enable.attr,
1790         &dev_attr_hotkey_bios_enabled.attr,
1791         &dev_attr_hotkey_report_mode.attr,
1792 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1793         &dev_attr_hotkey_mask.attr,
1794         &dev_attr_hotkey_all_mask.attr,
1795         &dev_attr_hotkey_recommended_mask.attr,
1796         &dev_attr_hotkey_source_mask.attr,
1797         &dev_attr_hotkey_poll_freq.attr,
1798 #endif
1799 };
1800
1801 static struct attribute *hotkey_mask_attributes[] __initdata = {
1802         &dev_attr_hotkey_bios_mask.attr,
1803 #ifndef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1804         &dev_attr_hotkey_mask.attr,
1805         &dev_attr_hotkey_all_mask.attr,
1806         &dev_attr_hotkey_recommended_mask.attr,
1807 #endif
1808         &dev_attr_hotkey_wakeup_reason.attr,
1809         &dev_attr_hotkey_wakeup_hotunplug_complete.attr,
1810 };
1811
1812 static int __init hotkey_init(struct ibm_init_struct *iibm)
1813 {
1814         /* Requirements for changing the default keymaps:
1815          *
1816          * 1. Many of the keys are mapped to KEY_RESERVED for very
1817          *    good reasons.  Do not change them unless you have deep
1818          *    knowledge on the IBM and Lenovo ThinkPad firmware for
1819          *    the various ThinkPad models.  The driver behaves
1820          *    differently for KEY_RESERVED: such keys have their
1821          *    hot key mask *unset* in mask_recommended, and also
1822          *    in the initial hot key mask programmed into the
1823          *    firmware at driver load time, which means the firm-
1824          *    ware may react very differently if you change them to
1825          *    something else;
1826          *
1827          * 2. You must be subscribed to the linux-thinkpad and
1828          *    ibm-acpi-devel mailing lists, and you should read the
1829          *    list archives since 2007 if you want to change the
1830          *    keymaps.  This requirement exists so that you will
1831          *    know the past history of problems with the thinkpad-
1832          *    acpi driver keymaps, and also that you will be
1833          *    listening to any bug reports;
1834          *
1835          * 3. Do not send thinkpad-acpi specific patches directly to
1836          *    for merging, *ever*.  Send them to the linux-acpi
1837          *    mailinglist for comments.  Merging is to be done only
1838          *    through acpi-test and the ACPI maintainer.
1839          *
1840          * If the above is too much to ask, don't change the keymap.
1841          * Ask the thinkpad-acpi maintainer to do it, instead.
1842          */
1843         static u16 ibm_keycode_map[] __initdata = {
1844                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1845                 KEY_FN_F1,      KEY_FN_F2,      KEY_COFFEE,     KEY_SLEEP,
1846                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1847                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1848
1849                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1850                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1851                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1852                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1853
1854                 /* brightness: firmware always reacts to them, unless
1855                  * X.org did some tricks in the radeon BIOS scratch
1856                  * registers of *some* models */
1857                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1858                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1859
1860                 /* Thinklight: firmware always react to it */
1861                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1862
1863                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1864                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1865
1866                 /* Volume: firmware always react to it and reprograms
1867                  * the built-in *extra* mixer.  Never map it to control
1868                  * another mixer by default. */
1869                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1870                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1871                 KEY_RESERVED,   /* 0x16: MUTE */
1872
1873                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1874
1875                 /* (assignments unknown, please report if found) */
1876                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1877                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1878         };
1879         static u16 lenovo_keycode_map[] __initdata = {
1880                 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */
1881                 KEY_FN_F1,      KEY_COFFEE,     KEY_BATTERY,    KEY_SLEEP,
1882                 KEY_WLAN,       KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8,
1883                 KEY_FN_F9,      KEY_FN_F10,     KEY_FN_F11,     KEY_SUSPEND,
1884
1885                 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */
1886                 KEY_UNKNOWN,    /* 0x0C: FN+BACKSPACE */
1887                 KEY_UNKNOWN,    /* 0x0D: FN+INSERT */
1888                 KEY_UNKNOWN,    /* 0x0E: FN+DELETE */
1889
1890                 KEY_RESERVED,   /* 0x0F: FN+HOME (brightness up) */
1891                 KEY_RESERVED,   /* 0x10: FN+END (brightness down) */
1892
1893                 KEY_RESERVED,   /* 0x11: FN+PGUP (thinklight toggle) */
1894
1895                 KEY_UNKNOWN,    /* 0x12: FN+PGDOWN */
1896                 KEY_ZOOM,       /* 0x13: FN+SPACE (zoom) */
1897
1898                 /* Volume: z60/z61, T60 (BIOS version?): firmware always
1899                  * react to it and reprograms the built-in *extra* mixer.
1900                  * Never map it to control another mixer by default.
1901                  *
1902                  * T60?, T61, R60?, R61: firmware and EC tries to send
1903                  * these over the regular keyboard, so these are no-ops,
1904                  * but there are still weird bugs re. MUTE, so do not
1905                  * change unless you get test reports from all Lenovo
1906                  * models.  May cause the BIOS to interfere with the
1907                  * HDA mixer.
1908                  */
1909                 KEY_RESERVED,   /* 0x14: VOLUME UP */
1910                 KEY_RESERVED,   /* 0x15: VOLUME DOWN */
1911                 KEY_RESERVED,   /* 0x16: MUTE */
1912
1913                 KEY_VENDOR,     /* 0x17: Thinkpad/AccessIBM/Lenovo */
1914
1915                 /* (assignments unknown, please report if found) */
1916                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1917                 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN,
1918         };
1919
1920 #define TPACPI_HOTKEY_MAP_LEN           ARRAY_SIZE(ibm_keycode_map)
1921 #define TPACPI_HOTKEY_MAP_SIZE          sizeof(ibm_keycode_map)
1922 #define TPACPI_HOTKEY_MAP_TYPESIZE      sizeof(ibm_keycode_map[0])
1923
1924         int res, i;
1925         int status;
1926         int hkeyv;
1927
1928         vdbg_printk(TPACPI_DBG_INIT, "initializing hotkey subdriver\n");
1929
1930         BUG_ON(!tpacpi_inputdev);
1931         BUG_ON(tpacpi_inputdev->open != NULL ||
1932                tpacpi_inputdev->close != NULL);
1933
1934         TPACPI_ACPIHANDLE_INIT(hkey);
1935         mutex_init(&hotkey_mutex);
1936
1937 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
1938         mutex_init(&hotkey_thread_mutex);
1939         mutex_init(&hotkey_thread_data_mutex);
1940 #endif
1941
1942         /* hotkey not supported on 570 */
1943         tp_features.hotkey = hkey_handle != NULL;
1944
1945         vdbg_printk(TPACPI_DBG_INIT, "hotkeys are %s\n",
1946                 str_supported(tp_features.hotkey));
1947
1948         if (tp_features.hotkey) {
1949                 hotkey_dev_attributes = create_attr_set(13, NULL);
1950                 if (!hotkey_dev_attributes)
1951                         return -ENOMEM;
1952                 res = add_many_to_attr_set(hotkey_dev_attributes,
1953                                 hotkey_attributes,
1954                                 ARRAY_SIZE(hotkey_attributes));
1955                 if (res)
1956                         return res;
1957
1958                 /* mask not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
1959                    A30, R30, R31, T20-22, X20-21, X22-24.  Detected by checking
1960                    for HKEY interface version 0x100 */
1961                 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) {
1962                         if ((hkeyv >> 8) != 1) {
1963                                 printk(TPACPI_ERR "unknown version of the "
1964                                        "HKEY interface: 0x%x\n", hkeyv);
1965                                 printk(TPACPI_ERR "please report this to %s\n",
1966                                        TPACPI_MAIL);
1967                         } else {
1968                                 /*
1969                                  * MHKV 0x100 in A31, R40, R40e,
1970                                  * T4x, X31, and later
1971                                  */
1972                                 tp_features.hotkey_mask = 1;
1973                         }
1974                 }
1975
1976                 vdbg_printk(TPACPI_DBG_INIT, "hotkey masks are %s\n",
1977                         str_supported(tp_features.hotkey_mask));
1978
1979                 if (tp_features.hotkey_mask) {
1980                         if (!acpi_evalf(hkey_handle, &hotkey_all_mask,
1981                                         "MHKA", "qd")) {
1982                                 printk(TPACPI_ERR
1983                                        "missing MHKA handler, "
1984                                        "please report this to %s\n",
1985                                        TPACPI_MAIL);
1986                                 /* FN+F12, FN+F4, FN+F3 */
1987                                 hotkey_all_mask = 0x080cU;
1988                         }
1989                 }
1990
1991                 /* hotkey_source_mask *must* be zero for
1992                  * the first hotkey_mask_get */
1993                 res = hotkey_status_get(&hotkey_orig_status);
1994                 if (!res && tp_features.hotkey_mask) {
1995                         res = hotkey_mask_get();
1996                         hotkey_orig_mask = hotkey_mask;
1997                         if (!res) {
1998                                 res = add_many_to_attr_set(
1999                                         hotkey_dev_attributes,
2000                                         hotkey_mask_attributes,
2001                                         ARRAY_SIZE(hotkey_mask_attributes));
2002                         }
2003                 }
2004
2005 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2006                 if (tp_features.hotkey_mask) {
2007                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK
2008                                                 & ~hotkey_all_mask;
2009                 } else {
2010                         hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK;
2011                 }
2012
2013                 vdbg_printk(TPACPI_DBG_INIT,
2014                             "hotkey source mask 0x%08x, polling freq %d\n",
2015                             hotkey_source_mask, hotkey_poll_freq);
2016 #endif
2017
2018                 /* Not all thinkpads have a hardware radio switch */
2019                 if (!res && acpi_evalf(hkey_handle, &status, "WLSW", "qd")) {
2020                         tp_features.hotkey_wlsw = 1;
2021                         printk(TPACPI_INFO
2022                                 "radio switch found; radios are %s\n",
2023                                 enabled(status, 0));
2024                         res = add_to_attr_set(hotkey_dev_attributes,
2025                                         &dev_attr_hotkey_radio_sw.attr);
2026                 }
2027
2028                 /* For X41t, X60t, X61t Tablets... */
2029                 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) {
2030                         tp_features.hotkey_tablet = 1;
2031                         printk(TPACPI_INFO
2032                                 "possible tablet mode switch found; "
2033                                 "ThinkPad in %s mode\n",
2034                                 (status & TP_HOTKEY_TABLET_MASK)?
2035                                         "tablet" : "laptop");
2036                         res = add_to_attr_set(hotkey_dev_attributes,
2037                                         &dev_attr_hotkey_tablet_mode.attr);
2038                 }
2039
2040                 if (!res)
2041                         res = register_attr_set_with_sysfs(
2042                                         hotkey_dev_attributes,
2043                                         &tpacpi_pdev->dev.kobj);
2044                 if (res)
2045                         return res;
2046
2047                 /* Set up key map */
2048
2049                 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE,
2050                                                 GFP_KERNEL);
2051                 if (!hotkey_keycode_map) {
2052                         printk(TPACPI_ERR
2053                                 "failed to allocate memory for key map\n");
2054                         return -ENOMEM;
2055                 }
2056
2057                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
2058                         dbg_printk(TPACPI_DBG_INIT,
2059                                    "using Lenovo default hot key map\n");
2060                         memcpy(hotkey_keycode_map, &lenovo_keycode_map,
2061                                 TPACPI_HOTKEY_MAP_SIZE);
2062                 } else {
2063                         dbg_printk(TPACPI_DBG_INIT,
2064                                    "using IBM default hot key map\n");
2065                         memcpy(hotkey_keycode_map, &ibm_keycode_map,
2066                                 TPACPI_HOTKEY_MAP_SIZE);
2067                 }
2068
2069                 set_bit(EV_KEY, tpacpi_inputdev->evbit);
2070                 set_bit(EV_MSC, tpacpi_inputdev->evbit);
2071                 set_bit(MSC_SCAN, tpacpi_inputdev->mscbit);
2072                 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE;
2073                 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN;
2074                 tpacpi_inputdev->keycode = hotkey_keycode_map;
2075                 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) {
2076                         if (hotkey_keycode_map[i] != KEY_RESERVED) {
2077                                 set_bit(hotkey_keycode_map[i],
2078                                         tpacpi_inputdev->keybit);
2079                         } else {
2080                                 if (i < sizeof(hotkey_reserved_mask)*8)
2081                                         hotkey_reserved_mask |= 1 << i;
2082                         }
2083                 }
2084
2085                 if (tp_features.hotkey_wlsw) {
2086                         set_bit(EV_SW, tpacpi_inputdev->evbit);
2087                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
2088                 }
2089                 if (tp_features.hotkey_tablet) {
2090                         set_bit(EV_SW, tpacpi_inputdev->evbit);
2091                         set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
2092                 }
2093
2094                 dbg_printk(TPACPI_DBG_INIT,
2095                                 "enabling hot key handling\n");
2096                 res = hotkey_status_set(1);
2097                 if (res)
2098                         return res;
2099                 res = hotkey_mask_set(((hotkey_all_mask | hotkey_source_mask)
2100                                         & ~hotkey_reserved_mask)
2101                                         | hotkey_orig_mask);
2102                 if (res < 0 && res != -ENXIO)
2103                         return res;
2104
2105                 dbg_printk(TPACPI_DBG_INIT,
2106                                 "legacy hot key reporting over procfs %s\n",
2107                                 (hotkey_report_mode < 2) ?
2108                                         "enabled" : "disabled");
2109
2110                 tpacpi_inputdev->open = &hotkey_inputdev_open;
2111                 tpacpi_inputdev->close = &hotkey_inputdev_close;
2112
2113                 hotkey_poll_setup_safe(1);
2114                 tpacpi_input_send_radiosw();
2115                 tpacpi_input_send_tabletsw();
2116         }
2117
2118         return (tp_features.hotkey)? 0 : 1;
2119 }
2120
2121 static void hotkey_exit(void)
2122 {
2123 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL
2124         hotkey_poll_stop_sync();
2125 #endif
2126
2127         if (tp_features.hotkey) {
2128                 dbg_printk(TPACPI_DBG_EXIT,
2129                            "restoring original hot key mask\n");
2130                 /* no short-circuit boolean operator below! */
2131                 if ((hotkey_mask_set(hotkey_orig_mask) |
2132                      hotkey_status_set(hotkey_orig_status)) != 0)
2133                         printk(TPACPI_ERR
2134                                "failed to restore hot key mask "
2135                                "to BIOS defaults\n");
2136         }
2137
2138         if (hotkey_dev_attributes) {
2139                 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj);
2140                 hotkey_dev_attributes = NULL;
2141         }
2142 }
2143
2144 static void hotkey_notify(struct ibm_struct *ibm, u32 event)
2145 {
2146         u32 hkey;
2147         unsigned int scancode;
2148         int send_acpi_ev;
2149         int ignore_acpi_ev;
2150         int unk_ev;
2151
2152         if (event != 0x80) {
2153                 printk(TPACPI_ERR
2154                        "unknown HKEY notification event %d\n", event);
2155                 /* forward it to userspace, maybe it knows how to handle it */
2156                 acpi_bus_generate_netlink_event(
2157                                         ibm->acpi->device->pnp.device_class,
2158                                         ibm->acpi->device->dev.bus_id,
2159                                         event, 0);
2160                 return;
2161         }
2162
2163         while (1) {
2164                 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) {
2165                         printk(TPACPI_ERR "failed to retrieve HKEY event\n");
2166                         return;
2167                 }
2168
2169                 if (hkey == 0) {
2170                         /* queue empty */
2171                         return;
2172                 }
2173
2174                 send_acpi_ev = 1;
2175                 ignore_acpi_ev = 0;
2176                 unk_ev = 0;
2177
2178                 switch (hkey >> 12) {
2179                 case 1:
2180                         /* 0x1000-0x1FFF: key presses */
2181                         scancode = hkey & 0xfff;
2182                         if (scancode > 0 && scancode < 0x21) {
2183                                 scancode--;
2184                                 if (!(hotkey_source_mask & (1 << scancode))) {
2185                                         tpacpi_input_send_key(scancode);
2186                                         send_acpi_ev = 0;
2187                                 } else {
2188                                         ignore_acpi_ev = 1;
2189                                 }
2190                         } else {
2191                                 unk_ev = 1;
2192                         }
2193                         break;
2194                 case 2:
2195                         /* Wakeup reason */
2196                         switch (hkey) {
2197                         case 0x2304: /* suspend, undock */
2198                         case 0x2404: /* hibernation, undock */
2199                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK;
2200                                 ignore_acpi_ev = 1;
2201                                 break;
2202                         case 0x2305: /* suspend, bay eject */
2203                         case 0x2405: /* hibernation, bay eject */
2204                                 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ;
2205                                 ignore_acpi_ev = 1;
2206                                 break;
2207                         default:
2208                                 unk_ev = 1;
2209                         }
2210                         if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) {
2211                                 printk(TPACPI_INFO
2212                                        "woke up due to a hot-unplug "
2213                                        "request...\n");
2214                                 hotkey_wakeup_reason_notify_change();
2215                         }
2216                         break;
2217                 case 3:
2218                         /* bay-related wakeups */
2219                         if (hkey == 0x3003) {
2220                                 hotkey_autosleep_ack = 1;
2221                                 printk(TPACPI_INFO
2222                                        "bay ejected\n");
2223                                 hotkey_wakeup_hotunplug_complete_notify_change();
2224                         } else {
2225                                 unk_ev = 1;
2226                         }
2227                         break;
2228                 case 4:
2229                         /* dock-related wakeups */
2230                         if (hkey == 0x4003) {
2231                                 hotkey_autosleep_ack = 1;
2232                                 printk(TPACPI_INFO
2233                                        "undocked\n");
2234                                 hotkey_wakeup_hotunplug_complete_notify_change();
2235                         } else {
2236                                 unk_ev = 1;
2237                         }
2238                         break;
2239                 case 5:
2240                         /* 0x5000-0x5FFF: human interface helpers */
2241                         switch (hkey) {
2242                         case 0x5010: /* Lenovo new BIOS: brightness changed */
2243                         case 0x500b: /* X61t: tablet pen inserted into bay */
2244                         case 0x500c: /* X61t: tablet pen removed from bay */
2245                                 break;
2246                         case 0x5009: /* X41t-X61t: swivel up (tablet mode) */
2247                         case 0x500a: /* X41t-X61t: swivel down (normal mode) */
2248                                 tpacpi_input_send_tabletsw();
2249                                 hotkey_tablet_mode_notify_change();
2250                                 send_acpi_ev = 0;
2251                                 break;
2252                         case 0x5001:
2253                         case 0x5002:
2254                                 /* LID switch events.  Do not propagate */
2255                                 ignore_acpi_ev = 1;
2256                                 break;
2257                         default:
2258                                 unk_ev = 1;
2259                         }
2260                         break;
2261                 case 7:
2262                         /* 0x7000-0x7FFF: misc */
2263                         if (tp_features.hotkey_wlsw && hkey == 0x7000) {
2264                                 tpacpi_input_send_radiosw();
2265                                 hotkey_radio_sw_notify_change();
2266                                 send_acpi_ev = 0;
2267                                 break;
2268                         }
2269                         /* fallthrough to default */
2270                 default:
2271                         unk_ev = 1;
2272                 }
2273                 if (unk_ev) {
2274                         printk(TPACPI_NOTICE
2275                                "unhandled HKEY event 0x%04x\n", hkey);
2276                 }
2277
2278                 /* Legacy events */
2279                 if (!ignore_acpi_ev &&
2280                     (send_acpi_ev || hotkey_report_mode < 2)) {
2281                         acpi_bus_generate_proc_event(ibm->acpi->device,
2282                                                      event, hkey);
2283                 }
2284
2285                 /* netlink events */
2286                 if (!ignore_acpi_ev && send_acpi_ev) {
2287                         acpi_bus_generate_netlink_event(
2288                                         ibm->acpi->device->pnp.device_class,
2289                                         ibm->acpi->device->dev.bus_id,
2290                                         event, hkey);
2291                 }
2292         }
2293 }
2294
2295 static void hotkey_suspend(pm_message_t state)
2296 {
2297         /* Do these on suspend, we get the events on early resume! */
2298         hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE;
2299         hotkey_autosleep_ack = 0;
2300 }
2301
2302 static void hotkey_resume(void)
2303 {
2304         if (hotkey_mask_get())
2305                 printk(TPACPI_ERR
2306                        "error while trying to read hot key mask "
2307                        "from firmware\n");
2308         tpacpi_input_send_radiosw();
2309         hotkey_radio_sw_notify_change();
2310         hotkey_tablet_mode_notify_change();
2311         hotkey_wakeup_reason_notify_change();
2312         hotkey_wakeup_hotunplug_complete_notify_change();
2313         hotkey_poll_setup_safe(0);
2314 }
2315
2316 /* procfs -------------------------------------------------------------- */
2317 static int hotkey_read(char *p)
2318 {
2319         int res, status;
2320         int len = 0;
2321
2322         if (!tp_features.hotkey) {
2323                 len += sprintf(p + len, "status:\t\tnot supported\n");
2324                 return len;
2325         }
2326
2327         if (mutex_lock_interruptible(&hotkey_mutex))
2328                 return -ERESTARTSYS;
2329         res = hotkey_status_get(&status);
2330         if (!res)
2331                 res = hotkey_mask_get();
2332         mutex_unlock(&hotkey_mutex);
2333         if (res)
2334                 return res;
2335
2336         len += sprintf(p + len, "status:\t\t%s\n", enabled(status, 0));
2337         if (tp_features.hotkey_mask) {
2338                 len += sprintf(p + len, "mask:\t\t0x%08x\n", hotkey_mask);
2339                 len += sprintf(p + len,
2340                                "commands:\tenable, disable, reset, <mask>\n");
2341         } else {
2342                 len += sprintf(p + len, "mask:\t\tnot supported\n");
2343                 len += sprintf(p + len, "commands:\tenable, disable, reset\n");
2344         }
2345
2346         return len;
2347 }
2348
2349 static int hotkey_write(char *buf)
2350 {
2351         int res, status;
2352         u32 mask;
2353         char *cmd;
2354
2355         if (!tp_features.hotkey)
2356                 return -ENODEV;
2357
2358         if (mutex_lock_interruptible(&hotkey_mutex))
2359                 return -ERESTARTSYS;
2360
2361         status = -1;
2362         mask = hotkey_mask;
2363
2364         res = 0;
2365         while ((cmd = next_cmd(&buf))) {
2366                 if (strlencmp(cmd, "enable") == 0) {
2367                         status = 1;
2368                 } else if (strlencmp(cmd, "disable") == 0) {
2369                         status = 0;
2370                 } else if (strlencmp(cmd, "reset") == 0) {
2371                         status = hotkey_orig_status;
2372                         mask = hotkey_orig_mask;
2373                 } else if (sscanf(cmd, "0x%x", &mask) == 1) {
2374                         /* mask set */
2375                 } else if (sscanf(cmd, "%x", &mask) == 1) {
2376                         /* mask set */
2377                 } else {
2378                         res = -EINVAL;
2379                         goto errexit;
2380                 }
2381         }
2382         if (status != -1)
2383                 res = hotkey_status_set(status);
2384
2385         if (!res && mask != hotkey_mask)
2386                 res = hotkey_mask_set(mask);
2387
2388 errexit:
2389         mutex_unlock(&hotkey_mutex);
2390         return res;
2391 }
2392
2393 static const struct acpi_device_id ibm_htk_device_ids[] = {
2394         {TPACPI_ACPI_HKEY_HID, 0},
2395         {"", 0},
2396 };
2397
2398 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = {
2399         .hid = ibm_htk_device_ids,
2400         .notify = hotkey_notify,
2401         .handle = &hkey_handle,
2402         .type = ACPI_DEVICE_NOTIFY,
2403 };
2404
2405 static struct ibm_struct hotkey_driver_data = {
2406         .name = "hotkey",
2407         .read = hotkey_read,
2408         .write = hotkey_write,
2409         .exit = hotkey_exit,
2410         .resume = hotkey_resume,
2411         .suspend = hotkey_suspend,
2412         .acpi = &ibm_hotkey_acpidriver,
2413 };
2414
2415 /*************************************************************************
2416  * Bluetooth subdriver
2417  */
2418
2419 enum {
2420         /* ACPI GBDC/SBDC bits */
2421         TP_ACPI_BLUETOOTH_HWPRESENT     = 0x01, /* Bluetooth hw available */
2422         TP_ACPI_BLUETOOTH_RADIOSSW      = 0x02, /* Bluetooth radio enabled */
2423         TP_ACPI_BLUETOOTH_UNK           = 0x04, /* unknown function */
2424 };
2425
2426 static int bluetooth_get_radiosw(void);
2427 static int bluetooth_set_radiosw(int radio_on);
2428
2429 /* sysfs bluetooth enable ---------------------------------------------- */
2430 static ssize_t bluetooth_enable_show(struct device *dev,
2431                            struct device_attribute *attr,
2432                            char *buf)
2433 {
2434         int status;
2435
2436         status = bluetooth_get_radiosw();
2437         if (status < 0)
2438                 return status;
2439
2440         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2441 }
2442
2443 static ssize_t bluetooth_enable_store(struct device *dev,
2444                             struct device_attribute *attr,
2445                             const char *buf, size_t count)
2446 {
2447         unsigned long t;
2448         int res;
2449
2450         if (parse_strtoul(buf, 1, &t))
2451                 return -EINVAL;
2452
2453         res = bluetooth_set_radiosw(t);
2454
2455         return (res) ? res : count;
2456 }
2457
2458 static struct device_attribute dev_attr_bluetooth_enable =
2459         __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO,
2460                 bluetooth_enable_show, bluetooth_enable_store);
2461
2462 /* --------------------------------------------------------------------- */
2463
2464 static struct attribute *bluetooth_attributes[] = {
2465         &dev_attr_bluetooth_enable.attr,
2466         NULL
2467 };
2468
2469 static const struct attribute_group bluetooth_attr_group = {
2470         .attrs = bluetooth_attributes,
2471 };
2472
2473 static int __init bluetooth_init(struct ibm_init_struct *iibm)
2474 {
2475         int res;
2476         int status = 0;
2477
2478         vdbg_printk(TPACPI_DBG_INIT, "initializing bluetooth subdriver\n");
2479
2480         TPACPI_ACPIHANDLE_INIT(hkey);
2481
2482         /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
2483            G4x, R30, R31, R40e, R50e, T20-22, X20-21 */
2484         tp_features.bluetooth = hkey_handle &&
2485             acpi_evalf(hkey_handle, &status, "GBDC", "qd");
2486
2487         vdbg_printk(TPACPI_DBG_INIT, "bluetooth is %s, status 0x%02x\n",
2488                 str_supported(tp_features.bluetooth),
2489                 status);
2490
2491         if (tp_features.bluetooth) {
2492                 if (!(status & TP_ACPI_BLUETOOTH_HWPRESENT)) {
2493                         /* no bluetooth hardware present in system */
2494                         tp_features.bluetooth = 0;
2495                         dbg_printk(TPACPI_DBG_INIT,
2496                                    "bluetooth hardware not installed\n");
2497                 } else {
2498                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2499                                         &bluetooth_attr_group);
2500                         if (res)
2501                                 return res;
2502                 }
2503         }
2504
2505         return (tp_features.bluetooth)? 0 : 1;
2506 }
2507
2508 static void bluetooth_exit(void)
2509 {
2510         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2511                         &bluetooth_attr_group);
2512 }
2513
2514 static int bluetooth_get_radiosw(void)
2515 {
2516         int status;
2517
2518         if (!tp_features.bluetooth)
2519                 return -ENODEV;
2520
2521         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2522                 return -EIO;
2523
2524         return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0);
2525 }
2526
2527 static int bluetooth_set_radiosw(int radio_on)
2528 {
2529         int status;
2530
2531         if (!tp_features.bluetooth)
2532                 return -ENODEV;
2533
2534         if (!acpi_evalf(hkey_handle, &status, "GBDC", "d"))
2535                 return -EIO;
2536         if (radio_on)
2537                 status |= TP_ACPI_BLUETOOTH_RADIOSSW;
2538         else
2539                 status &= ~TP_ACPI_BLUETOOTH_RADIOSSW;
2540         if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status))
2541                 return -EIO;
2542
2543         return 0;
2544 }
2545
2546 /* procfs -------------------------------------------------------------- */
2547 static int bluetooth_read(char *p)
2548 {
2549         int len = 0;
2550         int status = bluetooth_get_radiosw();
2551
2552         if (!tp_features.bluetooth)
2553                 len += sprintf(p + len, "status:\t\tnot supported\n");
2554         else {
2555                 len += sprintf(p + len, "status:\t\t%s\n",
2556                                 (status)? "enabled" : "disabled");
2557                 len += sprintf(p + len, "commands:\tenable, disable\n");
2558         }
2559
2560         return len;
2561 }
2562
2563 static int bluetooth_write(char *buf)
2564 {
2565         char *cmd;
2566
2567         if (!tp_features.bluetooth)
2568                 return -ENODEV;
2569
2570         while ((cmd = next_cmd(&buf))) {
2571                 if (strlencmp(cmd, "enable") == 0) {
2572                         bluetooth_set_radiosw(1);
2573                 } else if (strlencmp(cmd, "disable") == 0) {
2574                         bluetooth_set_radiosw(0);
2575                 } else
2576                         return -EINVAL;
2577         }
2578
2579         return 0;
2580 }
2581
2582 static struct ibm_struct bluetooth_driver_data = {
2583         .name = "bluetooth",
2584         .read = bluetooth_read,
2585         .write = bluetooth_write,
2586         .exit = bluetooth_exit,
2587 };
2588
2589 /*************************************************************************
2590  * Wan subdriver
2591  */
2592
2593 enum {
2594         /* ACPI GWAN/SWAN bits */
2595         TP_ACPI_WANCARD_HWPRESENT       = 0x01, /* Wan hw available */
2596         TP_ACPI_WANCARD_RADIOSSW        = 0x02, /* Wan radio enabled */
2597         TP_ACPI_WANCARD_UNK             = 0x04, /* unknown function */
2598 };
2599
2600 static int wan_get_radiosw(void);
2601 static int wan_set_radiosw(int radio_on);
2602
2603 /* sysfs wan enable ---------------------------------------------------- */
2604 static ssize_t wan_enable_show(struct device *dev,
2605                            struct device_attribute *attr,
2606                            char *buf)
2607 {
2608         int status;
2609
2610         status = wan_get_radiosw();
2611         if (status < 0)
2612                 return status;
2613
2614         return snprintf(buf, PAGE_SIZE, "%d\n", status ? 1 : 0);
2615 }
2616
2617 static ssize_t wan_enable_store(struct device *dev,
2618                             struct device_attribute *attr,
2619                             const char *buf, size_t count)
2620 {
2621         unsigned long t;
2622         int res;
2623
2624         if (parse_strtoul(buf, 1, &t))
2625                 return -EINVAL;
2626
2627         res = wan_set_radiosw(t);
2628
2629         return (res) ? res : count;
2630 }
2631
2632 static struct device_attribute dev_attr_wan_enable =
2633         __ATTR(wwan_enable, S_IWUSR | S_IRUGO,
2634                 wan_enable_show, wan_enable_store);
2635
2636 /* --------------------------------------------------------------------- */
2637
2638 static struct attribute *wan_attributes[] = {
2639         &dev_attr_wan_enable.attr,
2640         NULL
2641 };
2642
2643 static const struct attribute_group wan_attr_group = {
2644         .attrs = wan_attributes,
2645 };
2646
2647 static int __init wan_init(struct ibm_init_struct *iibm)
2648 {
2649         int res;
2650         int status = 0;
2651
2652         vdbg_printk(TPACPI_DBG_INIT, "initializing wan subdriver\n");
2653
2654         TPACPI_ACPIHANDLE_INIT(hkey);
2655
2656         tp_features.wan = hkey_handle &&
2657             acpi_evalf(hkey_handle, &status, "GWAN", "qd");
2658
2659         vdbg_printk(TPACPI_DBG_INIT, "wan is %s, status 0x%02x\n",
2660                 str_supported(tp_features.wan),
2661                 status);
2662
2663         if (tp_features.wan) {
2664                 if (!(status & TP_ACPI_WANCARD_HWPRESENT)) {
2665                         /* no wan hardware present in system */
2666                         tp_features.wan = 0;
2667                         dbg_printk(TPACPI_DBG_INIT,
2668                                    "wan hardware not installed\n");
2669                 } else {
2670                         res = sysfs_create_group(&tpacpi_pdev->dev.kobj,
2671                                         &wan_attr_group);
2672                         if (res)
2673                                 return res;
2674                 }
2675         }
2676
2677         return (tp_features.wan)? 0 : 1;
2678 }
2679
2680 static void wan_exit(void)
2681 {
2682         sysfs_remove_group(&tpacpi_pdev->dev.kobj,
2683                 &wan_attr_group);
2684 }
2685
2686 static int wan_get_radiosw(void)
2687 {
2688         int status;
2689
2690         if (!tp_features.wan)
2691                 return -ENODEV;
2692
2693         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2694                 return -EIO;
2695
2696         return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0);
2697 }
2698
2699 static int wan_set_radiosw(int radio_on)
2700 {
2701         int status;
2702
2703         if (!tp_features.wan)
2704                 return -ENODEV;
2705
2706         if (!acpi_evalf(hkey_handle, &status, "GWAN", "d"))
2707                 return -EIO;
2708         if (radio_on)
2709                 status |= TP_ACPI_WANCARD_RADIOSSW;
2710         else
2711                 status &= ~TP_ACPI_WANCARD_RADIOSSW;
2712         if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status))
2713                 return -EIO;
2714
2715         return 0;
2716 }
2717
2718 /* procfs -------------------------------------------------------------- */
2719 static int wan_read(char *p)
2720 {
2721         int len = 0;
2722         int status = wan_get_radiosw();
2723
2724         if (!tp_features.wan)
2725                 len += sprintf(p + len, "status:\t\tnot supported\n");
2726         else {
2727                 len += sprintf(p + len, "status:\t\t%s\n",
2728                                 (status)? "enabled" : "disabled");
2729                 len += sprintf(p + len, "commands:\tenable, disable\n");
2730         }
2731
2732         return len;
2733 }
2734
2735 static int wan_write(char *buf)
2736 {
2737         char *cmd;
2738
2739         if (!tp_features.wan)
2740                 return -ENODEV;
2741
2742         while ((cmd = next_cmd(&buf))) {
2743                 if (strlencmp(cmd, "enable") == 0) {
2744                         wan_set_radiosw(1);
2745                 } else if (strlencmp(cmd, "disable") == 0) {
2746                         wan_set_radiosw(0);
2747                 } else
2748                         return -EINVAL;
2749         }
2750
2751         return 0;
2752 }
2753
2754 static struct ibm_struct wan_driver_data = {
2755         .name = "wan",
2756         .read = wan_read,
2757         .write = wan_write,
2758         .exit = wan_exit,
2759         .flags.experimental = 1,
2760 };
2761
2762 /*************************************************************************
2763  * Video subdriver
2764  */
2765
2766 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
2767
2768 enum video_access_mode {
2769         TPACPI_VIDEO_NONE = 0,
2770         TPACPI_VIDEO_570,       /* 570 */
2771         TPACPI_VIDEO_770,       /* 600e/x, 770e, 770x */
2772         TPACPI_VIDEO_NEW,       /* all others */
2773 };
2774
2775 enum {  /* video status flags, based on VIDEO_570 */
2776         TP_ACPI_VIDEO_S_LCD = 0x01,     /* LCD output enabled */
2777         TP_ACPI_VIDEO_S_CRT = 0x02,     /* CRT output enabled */
2778         TP_ACPI_VIDEO_S_DVI = 0x08,     /* DVI output enabled */
2779 };
2780
2781 enum {  /* TPACPI_VIDEO_570 constants */
2782         TP_ACPI_VIDEO_570_PHSCMD = 0x87,        /* unknown magic constant :( */
2783         TP_ACPI_VIDEO_570_PHSMASK = 0x03,       /* PHS bits that map to
2784                                                  * video_status_flags */
2785         TP_ACPI_VIDEO_570_PHS2CMD = 0x8b,       /* unknown magic constant :( */
2786         TP_ACPI_VIDEO_570_PHS2SET = 0x80,       /* unknown magic constant :( */
2787 };
2788
2789 static enum video_access_mode video_supported;
2790 static int video_orig_autosw;
2791
2792 static int video_autosw_get(void);
2793 static int video_autosw_set(int enable);
2794
2795 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID");       /* G41 */
2796
2797 static int __init video_init(struct ibm_init_struct *iibm)
2798 {
2799         int ivga;
2800
2801         vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n");
2802
2803         TPACPI_ACPIHANDLE_INIT(vid);
2804         TPACPI_ACPIHANDLE_INIT(vid2);
2805
2806         if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga)
2807                 /* G41, assume IVGA doesn't change */
2808                 vid_handle = vid2_handle;
2809
2810         if (!vid_handle)
2811                 /* video switching not supported on R30, R31 */
2812                 video_supported = TPACPI_VIDEO_NONE;
2813         else if (acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd"))
2814                 /* 570 */
2815                 video_supported = TPACPI_VIDEO_570;
2816         else if (acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd"))
2817                 /* 600e/x, 770e, 770x */
2818                 video_supported = TPACPI_VIDEO_770;
2819         else
2820                 /* all others */
2821                 video_supported = TPACPI_VIDEO_NEW;
2822
2823         vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n",
2824                 str_supported(video_supported != TPACPI_VIDEO_NONE),
2825                 video_supported);
2826
2827         return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1;
2828 }
2829
2830 static void video_exit(void)
2831 {
2832         dbg_printk(TPACPI_DBG_EXIT,
2833                    "restoring original video autoswitch mode\n");
2834         if (video_autosw_set(video_orig_autosw))
2835                 printk(TPACPI_ERR "error while trying to restore original "
2836                         "video autoswitch mode\n");
2837 }
2838
2839 static int video_outputsw_get(void)
2840 {
2841         int status = 0;
2842         int i;
2843
2844         switch (video_supported) {
2845         case TPACPI_VIDEO_570:
2846                 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd",
2847                                  TP_ACPI_VIDEO_570_PHSCMD))
2848                         return -EIO;
2849                 status = i & TP_ACPI_VIDEO_570_PHSMASK;
2850                 break;
2851         case TPACPI_VIDEO_770:
2852                 if (!acpi_evalf(NULL, &i, "\\VCDL", "d"))
2853                         return -EIO;
2854                 if (i)
2855                         status |= TP_ACPI_VIDEO_S_LCD;
2856                 if (!acpi_evalf(NULL, &i, "\\VCDC", "d"))
2857                         return -EIO;
2858                 if (i)
2859                         status |= TP_ACPI_VIDEO_S_CRT;
2860                 break;
2861         case TPACPI_VIDEO_NEW:
2862                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) ||
2863                     !acpi_evalf(NULL, &i, "\\VCDC", "d"))
2864                         return -EIO;
2865                 if (i)
2866                         status |= TP_ACPI_VIDEO_S_CRT;
2867
2868                 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) ||
2869                     !acpi_evalf(NULL, &i, "\\VCDL", "d"))
2870                         return -EIO;
2871                 if (i)
2872                         status |= TP_ACPI_VIDEO_S_LCD;
2873                 if (!acpi_evalf(NULL, &i, "\\VCDD", "d"))
2874                         return -EIO;
2875                 if (i)
2876                         status |= TP_ACPI_VIDEO_S_DVI;
2877                 break;
2878         default:
2879                 return -ENOSYS;
2880         }
2881
2882         return status;
2883 }
2884
2885 static int video_outputsw_set(int status)
2886 {
2887         int autosw;
2888         int res = 0;
2889
2890         switch (video_supported) {
2891         case TPACPI_VIDEO_570:
2892                 res = acpi_evalf(NULL, NULL,
2893                                  "\\_SB.PHS2", "vdd",
2894                                  TP_ACPI_VIDEO_570_PHS2CMD,
2895                                  status | TP_ACPI_VIDEO_570_PHS2SET);
2896                 break;
2897         case TPACPI_VIDEO_770:
2898                 autosw = video_autosw_get();
2899                 if (autosw < 0)
2900                         return autosw;
2901
2902                 res = video_autosw_set(1);
2903                 if (res)
2904                         return res;
2905                 res = acpi_evalf(vid_handle, NULL,
2906                                  "ASWT", "vdd", status * 0x100, 0);
2907                 if (!autosw && video_autosw_set(autosw)) {
2908                         printk(TPACPI_ERR
2909                                "video auto-switch left enabled due to error\n");
2910                         return -EIO;
2911                 }
2912                 break;
2913         case TPACPI_VIDEO_NEW:
2914                 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) &&
2915                       acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1);
2916                 break;
2917         default:
2918                 return -ENOSYS;
2919         }
2920
2921         return (res)? 0 : -EIO;
2922 }
2923
2924 static int video_autosw_get(void)
2925 {
2926         int autosw = 0;
2927
2928         switch (video_supported) {
2929         case TPACPI_VIDEO_570:
2930                 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d"))
2931                         return -EIO;
2932                 break;
2933         case TPACPI_VIDEO_770:
2934         case TPACPI_VIDEO_NEW:
2935                 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d"))
2936                         return -EIO;
2937                 break;
2938         default:
2939                 return -ENOSYS;
2940         }
2941
2942         return autosw & 1;
2943 }
2944
2945 static int video_autosw_set(int enable)
2946 {
2947         if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0))
2948                 return -EIO;
2949         return 0;
2950 }
2951
2952 static int video_outputsw_cycle(void)
2953 {
2954         int autosw = video_autosw_get();
2955         int res;
2956
2957         if (autosw < 0)
2958                 return autosw;
2959
2960         switch (video_supported) {
2961         case TPACPI_VIDEO_570:
2962                 res = video_autosw_set(1);
2963                 if (res)
2964                         return res;
2965                 res = acpi_evalf(ec_handle, NULL, "_Q16", "v");
2966                 break;
2967         case TPACPI_VIDEO_770:
2968         case TPACPI_VIDEO_NEW:
2969                 res = video_autosw_set(1);
2970                 if (res)
2971                         return res;
2972                 res = acpi_evalf(vid_handle, NULL, "VSWT", "v");
2973                 break;
2974         default:
2975                 return -ENOSYS;
2976         }
2977         if (!autosw && video_autosw_set(autosw)) {
2978                 printk(TPACPI_ERR
2979                        "video auto-switch left enabled due to error\n");
2980                 return -EIO;
2981         }
2982
2983         return (res)? 0 : -EIO;
2984 }
2985
2986 static int video_expand_toggle(void)
2987 {
2988         switch (video_supported) {
2989         case TPACPI_VIDEO_570:
2990                 return acpi_evalf(ec_handle, NULL, "_Q17", "v")?
2991                         0 : -EIO;
2992         case TPACPI_VIDEO_770:
2993                 return acpi_evalf(vid_handle, NULL, "VEXP", "v")?
2994                         0 : -EIO;
2995         case TPACPI_VIDEO_NEW:
2996                 return acpi_evalf(NULL, NULL, "\\VEXP", "v")?
2997                         0 : -EIO;
2998         default:
2999                 return -ENOSYS;
3000         }
3001         /* not reached */
3002 }
3003
3004 static int video_read(char *p)
3005 {
3006         int status, autosw;
3007         int len = 0;
3008
3009         if (video_supported == TPACPI_VIDEO_NONE) {
3010                 len += sprintf(p + len, "status:\t\tnot supported\n");
3011                 return len;
3012         }
3013
3014         status = video_outputsw_get();
3015         if (status < 0)
3016                 return status;
3017
3018         autosw = video_autosw_get();
3019         if (autosw < 0)
3020                 return autosw;
3021
3022         len += sprintf(p + len, "status:\t\tsupported\n");
3023         len += sprintf(p + len, "lcd:\t\t%s\n", enabled(status, 0));
3024         len += sprintf(p + len, "crt:\t\t%s\n", enabled(status, 1));
3025         if (video_supported == TPACPI_VIDEO_NEW)
3026                 len += sprintf(p + len, "dvi:\t\t%s\n", enabled(status, 3));
3027         len += sprintf(p + len, "auto:\t\t%s\n", enabled(autosw, 0));
3028         len += sprintf(p + len, "commands:\tlcd_enable, lcd_disable\n");
3029         len += sprintf(p + len, "commands:\tcrt_enable, crt_disable\n");
3030         if (video_supported == TPACPI_VIDEO_NEW)
3031                 len += sprintf(p + len, "commands:\tdvi_enable, dvi_disable\n");
3032         len += sprintf(p + len, "commands:\tauto_enable, auto_disable\n");
3033         len += sprintf(p + len, "commands:\tvideo_switch, expand_toggle\n");
3034
3035         return len;
3036 }
3037
3038 static int video_write(char *buf)
3039 {
3040         char *cmd;
3041         int enable, disable, status;
3042         int res;
3043
3044         if (video_supported == TPACPI_VIDEO_NONE)
3045                 return -ENODEV;
3046
3047         enable = 0;
3048         disable = 0;
3049
3050         while ((cmd = next_cmd(&buf))) {
3051                 if (strlencmp(cmd, "lcd_enable") == 0) {
3052                         enable |= TP_ACPI_VIDEO_S_LCD;
3053                 } else if (strlencmp(cmd, "lcd_disable") == 0) {
3054                         disable |= TP_ACPI_VIDEO_S_LCD;
3055                 } else if (strlencmp(cmd, "crt_enable") == 0) {
3056                         enable |= TP_ACPI_VIDEO_S_CRT;
3057                 } else if (strlencmp(cmd, "crt_disable") == 0) {
3058                         disable |= TP_ACPI_VIDEO_S_CRT;
3059                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3060                            strlencmp(cmd, "dvi_enable") == 0) {
3061                         enable |= TP_ACPI_VIDEO_S_DVI;
3062                 } else if (video_supported == TPACPI_VIDEO_NEW &&
3063                            strlencmp(cmd, "dvi_disable") == 0) {
3064                         disable |= TP_ACPI_VIDEO_S_DVI;
3065                 } else if (strlencmp(cmd, "auto_enable") == 0) {
3066                         res = video_autosw_set(1);
3067                         if (res)
3068                                 return res;
3069                 } else if (strlencmp(cmd, "auto_disable") == 0) {
3070                         res = video_autosw_set(0);
3071                         if (res)
3072                                 return res;
3073                 } else if (strlencmp(cmd, "video_switch") == 0) {
3074                         res = video_outputsw_cycle();
3075                         if (res)
3076                                 return res;
3077                 } else if (strlencmp(cmd, "expand_toggle") == 0) {
3078                         res = video_expand_toggle();
3079                         if (res)
3080                                 return res;
3081                 } else
3082                         return -EINVAL;
3083         }
3084
3085         if (enable || disable) {
3086                 status = video_outputsw_get();
3087                 if (status < 0)
3088                         return status;
3089                 res = video_outputsw_set((status & ~disable) | enable);
3090                 if (res)
3091                         return res;
3092         }
3093
3094         return 0;
3095 }
3096
3097 static struct ibm_struct video_driver_data = {
3098         .name = "video",
3099         .read = video_read,
3100         .write = video_write,
3101         .exit = video_exit,
3102 };
3103
3104 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */
3105
3106 /*************************************************************************
3107  * Light (thinklight) subdriver
3108  */
3109
3110 TPACPI_HANDLE(lght, root, "\\LGHT");    /* A21e, A2xm/p, T20-22, X20-21 */
3111 TPACPI_HANDLE(ledb, ec, "LEDB");                /* G4x */
3112
3113 static int __init light_init(struct ibm_init_struct *iibm)
3114 {
3115         vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n");
3116
3117         TPACPI_ACPIHANDLE_INIT(ledb);
3118         TPACPI_ACPIHANDLE_INIT(lght);
3119         TPACPI_ACPIHANDLE_INIT(cmos);
3120
3121         /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */
3122         tp_features.light = (cmos_handle || lght_handle) && !ledb_handle;
3123
3124         if (tp_features.light)
3125                 /* light status not supported on
3126                    570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */
3127                 tp_features.light_status =
3128                         acpi_evalf(ec_handle, NULL, "KBLT", "qv");
3129
3130         vdbg_printk(TPACPI_DBG_INIT, "light is %s\n",
3131                 str_supported(tp_features.light));
3132
3133         return (tp_features.light)? 0 : 1;
3134 }
3135
3136 static int light_read(char *p)
3137 {
3138         int len = 0;
3139         int status = 0;
3140
3141         if (!tp_features.light) {
3142                 len += sprintf(p + len, "status:\t\tnot supported\n");
3143         } else if (!tp_features.light_status) {
3144                 len += sprintf(p + len, "status:\t\tunknown\n");
3145                 len += sprintf(p + len, "commands:\ton, off\n");
3146         } else {
3147                 if (!acpi_evalf(ec_handle, &status, "KBLT", "d"))
3148                         return -EIO;
3149                 len += sprintf(p + len, "status:\t\t%s\n", onoff(status, 0));
3150                 len += sprintf(p + len, "commands:\ton, off\n");
3151         }
3152
3153         return len;
3154 }
3155
3156 static int light_write(char *buf)
3157 {
3158         int cmos_cmd, lght_cmd;
3159         char *cmd;
3160         int success;
3161
3162         if (!tp_features.light)
3163                 return -ENODEV;
3164
3165         while ((cmd = next_cmd(&buf))) {
3166                 if (strlencmp(cmd, "on") == 0) {
3167                         cmos_cmd = 0x0c;
3168                         lght_cmd = 1;
3169                 } else if (strlencmp(cmd, "off") == 0) {
3170                         cmos_cmd = 0x0d;
3171                         lght_cmd = 0;
3172                 } else
3173                         return -EINVAL;
3174
3175                 success = cmos_handle ?
3176                     acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd) :
3177                     acpi_evalf(lght_handle, NULL, NULL, "vd", lght_cmd);
3178                 if (!success)
3179                         return -EIO;
3180         }
3181
3182         return 0;
3183 }
3184
3185 static struct ibm_struct light_driver_data = {
3186         .name = "light",
3187         .read = light_read,
3188         .write = light_write,
3189 };
3190
3191 /*************************************************************************
3192  * Dock subdriver
3193  */
3194
3195 #ifdef CONFIG_THINKPAD_ACPI_DOCK
3196
3197 static void dock_notify(struct ibm_struct *ibm, u32 event);
3198 static int dock_read(char *p);
3199 static int dock_write(char *buf);
3200
3201 TPACPI_HANDLE(dock, root, "\\_SB.GDCK", /* X30, X31, X40 */
3202            "\\_SB.PCI0.DOCK",   /* 600e/x,770e,770x,A2xm/p,T20-22,X20-21 */
3203            "\\_SB.PCI0.PCI1.DOCK",      /* all others */
3204            "\\_SB.PCI.ISA.SLCE",        /* 570 */
3205     );                          /* A21e,G4x,R30,R31,R32,R40,R40e,R50e */
3206
3207 /* don't list other alternatives as we install a notify handler on the 570 */
3208 TPACPI_HANDLE(pci, root, "\\_SB.PCI");  /* 570 */
3209
3210 static const struct acpi_device_id ibm_pci_device_ids[] = {
3211         {PCI_ROOT_HID_STRING, 0},
3212         {"", 0},
3213 };
3214
3215 static struct tp_acpi_drv_struct ibm_dock_acpidriver[2] = {
3216         {
3217          .notify = dock_notify,
3218          .handle = &dock_handle,
3219          .type = ACPI_SYSTEM_NOTIFY,
3220         },
3221         {
3222         /* THIS ONE MUST NEVER BE USED FOR DRIVER AUTOLOADING.
3223          * We just use it to get notifications of dock hotplug
3224          * in very old thinkpads */
3225          .hid = ibm_pci_device_ids,
3226          .notify = dock_notify,
3227          .handle = &pci_handle,
3228          .type = ACPI_SYSTEM_NOTIFY,
3229         },
3230 };
3231
3232 static struct ibm_struct dock_driver_data[2] = {
3233         {
3234          .name = "dock",
3235          .read = dock_read,
3236          .write = dock_write,
3237          .acpi = &ibm_dock_acpidriver[0],
3238         },
3239         {
3240          .name = "dock",
3241          .acpi = &ibm_dock_acpidriver[1],
3242         },
3243 };
3244
3245 #define dock_docked() (_sta(dock_handle) & 1)
3246
3247 static int __init dock_init(struct ibm_init_struct *iibm)
3248 {
3249         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver\n");
3250
3251         TPACPI_ACPIHANDLE_INIT(dock);
3252
3253         vdbg_printk(TPACPI_DBG_INIT, "dock is %s\n",
3254                 str_supported(dock_handle != NULL));
3255
3256         return (dock_handle)? 0 : 1;
3257 }
3258
3259 static int __init dock_init2(struct ibm_init_struct *iibm)
3260 {
3261         int dock2_needed;
3262
3263         vdbg_printk(TPACPI_DBG_INIT, "initializing dock subdriver part 2\n");
3264
3265         if (dock_driver_data[0].flags.acpi_driver_registered &&
3266             dock_driver_data[0].flags.acpi_notify_installed) {
3267                 TPACPI_ACPIHANDLE_INIT(pci);
3268                 dock2_needed = (pci_handle != NULL);
3269                 vdbg_printk(TPACPI_DBG_INIT,
3270                             "dock PCI handler for the TP 570 is %s\n",
3271                             str_supported(dock2_needed));
3272         } else {
3273                 vdbg_printk(TPACPI_DBG_INIT,
3274                 "dock subdriver part 2 not required\n");
3275                 dock2_needed = 0;
3276         }
3277
3278         return (dock2_needed)? 0 : 1;
3279 }
3280
3281 static void dock_notify(struct ibm_struct *ibm, u32 event)
3282 {
3283         int docked = dock_docked();
3284         int pci = ibm->acpi->hid && ibm->acpi->device &&
3285                 acpi_match_device_ids(ibm->acpi->device, ibm_pci_device_ids);
3286         int data;
3287
3288         if (event == 1 && !pci) /* 570 */
3289                 data = 1;       /* button */
3290         else if (event == 1 && pci)     /* 570 */
3291                 data = 3;       /* dock */
3292         else if (event == 3 && docked)
3293                 data = 1;       /* button */
3294         else if (event == 3 && !docked)
3295                 data = 2;       /* undock */
3296         else if (event == 0 && docked)
3297                 data = 3;       /* dock */
3298         else {
3299                 printk(TPACPI_ERR "unknown dock event %d, status %d\n",
3300                        event, _sta(dock_handle));
3301                 data = 0;       /* unknown */
3302         }
3303         acpi_bus_generate_proc_event(ibm->acpi->device, event, data);
3304         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3305                                           ibm->acpi->device->dev.bus_id,
3306                                           event, data);
3307 }
3308
3309 static int dock_read(char *p)
3310 {
3311         int len = 0;
3312         int docked = dock_docked();
3313
3314         if (!dock_handle)
3315                 len += sprintf(p + len, "status:\t\tnot supported\n");
3316         else if (!docked)
3317                 len += sprintf(p + len, "status:\t\tundocked\n");
3318         else {
3319                 len += sprintf(p + len, "status:\t\tdocked\n");
3320                 len += sprintf(p + len, "commands:\tdock, undock\n");
3321         }
3322
3323         return len;
3324 }
3325
3326 static int dock_write(char *buf)
3327 {
3328         char *cmd;
3329
3330         if (!dock_docked())
3331                 return -ENODEV;
3332
3333         while ((cmd = next_cmd(&buf))) {
3334                 if (strlencmp(cmd, "undock") == 0) {
3335                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 0) ||
3336                             !acpi_evalf(dock_handle, NULL, "_EJ0", "vd", 1))
3337                                 return -EIO;
3338                 } else if (strlencmp(cmd, "dock") == 0) {
3339                         if (!acpi_evalf(dock_handle, NULL, "_DCK", "vd", 1))
3340                                 return -EIO;
3341                 } else
3342                         return -EINVAL;
3343         }
3344
3345         return 0;
3346 }
3347
3348 #endif /* CONFIG_THINKPAD_ACPI_DOCK */
3349
3350 /*************************************************************************
3351  * Bay subdriver
3352  */
3353
3354 #ifdef CONFIG_THINKPAD_ACPI_BAY
3355
3356 TPACPI_HANDLE(bay, root, "\\_SB.PCI.IDE.SECN.MAST",     /* 570 */
3357            "\\_SB.PCI0.IDE0.IDES.IDSM", /* 600e/x, 770e, 770x */
3358            "\\_SB.PCI0.SATA.SCND.MSTR", /* T60, X60, Z60 */
3359            "\\_SB.PCI0.IDE0.SCND.MSTR", /* all others */
3360            );                           /* A21e, R30, R31 */
3361 TPACPI_HANDLE(bay_ej, bay, "_EJ3",      /* 600e/x, A2xm/p, A3x */
3362            "_EJ0",              /* all others */
3363            );                   /* 570,A21e,G4x,R30,R31,R32,R40e,R50e */
3364 TPACPI_HANDLE(bay2, root, "\\_SB.PCI0.IDE0.PRIM.SLAV",  /* A3x, R32 */
3365            "\\_SB.PCI0.IDE0.IDEP.IDPS", /* 600e/x, 770e, 770x */
3366            );                           /* all others */
3367 TPACPI_HANDLE(bay2_ej, bay2, "_EJ3",    /* 600e/x, 770e, A3x */
3368            "_EJ0",                      /* 770x */
3369            );                           /* all others */
3370
3371 static int __init bay_init(struct ibm_init_struct *iibm)
3372 {
3373         vdbg_printk(TPACPI_DBG_INIT, "initializing bay subdriver\n");
3374
3375         TPACPI_ACPIHANDLE_INIT(bay);
3376         if (bay_handle)
3377                 TPACPI_ACPIHANDLE_INIT(bay_ej);
3378         TPACPI_ACPIHANDLE_INIT(bay2);
3379         if (bay2_handle)
3380                 TPACPI_ACPIHANDLE_INIT(bay2_ej);
3381
3382         tp_features.bay_status = bay_handle &&
3383                 acpi_evalf(bay_handle, NULL, "_STA", "qv");
3384         tp_features.bay_status2 = bay2_handle &&
3385                 acpi_evalf(bay2_handle, NULL, "_STA", "qv");
3386
3387         tp_features.bay_eject = bay_handle && bay_ej_handle &&
3388                 (strlencmp(bay_ej_path, "_EJ0") == 0 || experimental);
3389         tp_features.bay_eject2 = bay2_handle && bay2_ej_handle &&
3390                 (strlencmp(bay2_ej_path, "_EJ0") == 0 || experimental);
3391
3392         vdbg_printk(TPACPI_DBG_INIT,
3393                 "bay 1: status %s, eject %s; bay 2: status %s, eject %s\n",
3394                 str_supported(tp_features.bay_status),
3395                 str_supported(tp_features.bay_eject),
3396                 str_supported(tp_features.bay_status2),
3397                 str_supported(tp_features.bay_eject2));
3398
3399         return (tp_features.bay_status || tp_features.bay_eject ||
3400                 tp_features.bay_status2 || tp_features.bay_eject2)? 0 : 1;
3401 }
3402
3403 static void bay_notify(struct ibm_struct *ibm, u32 event)
3404 {
3405         acpi_bus_generate_proc_event(ibm->acpi->device, event, 0);
3406         acpi_bus_generate_netlink_event(ibm->acpi->device->pnp.device_class,
3407                                           ibm->acpi->device->dev.bus_id,
3408                                           event, 0);
3409 }
3410
3411 #define bay_occupied(b) (_sta(b##_handle) & 1)
3412
3413 static int bay_read(char *p)
3414 {
3415         int len = 0;
3416         int occupied = bay_occupied(bay);
3417         int occupied2 = bay_occupied(bay2);
3418         int eject, eject2;
3419
3420         len += sprintf(p + len, "status:\t\t%s\n",
3421                 tp_features.bay_status ?
3422                         (occupied ? "occupied" : "unoccupied") :
3423                                 "not supported");
3424         if (tp_features.bay_status2)
3425                 len += sprintf(p + len, "status2:\t%s\n", occupied2 ?
3426                                "occupied" : "unoccupied");
3427
3428         eject = tp_features.bay_eject && occupied;
3429         eject2 = tp_features.bay_eject2 && occupied2;
3430
3431         if (eject && eject2)
3432                 len += sprintf(p + len, "commands:\teject, eject2\n");
3433         else if (eject)
3434                 len += sprintf(p + len, "commands:\teject\n");
3435         else if (eject2)
3436                 len += sprintf(p + len, "commands:\teject2\n");
3437
3438         return len;
3439 }
3440
3441 static int bay_write(char *buf)
3442 {
3443         char *cmd;
3444
3445         if (!tp_features.bay_eject && !tp_features.bay_eject2)
3446                 return -ENODEV;
3447
3448         while ((cmd = next_cmd(&buf))) {
3449                 if (tp_features.bay_eject && strlencmp(cmd, "eject") == 0) {
3450                         if (!acpi_evalf(bay_ej_handle, NULL, NULL, "vd", 1))
3451                                 return -EIO;
3452                 } else if (tp_features.bay_eject2 &&
3453                            strlencmp(cmd, "eject2") == 0) {
3454                         if (!acpi_evalf(bay2_ej_handle, NULL, NULL, "vd", 1))
3455                                 return -EIO;
3456                 } else
3457                         return -EINVAL;
3458         }
3459
3460         return 0;
3461 }
3462
3463 static struct tp_acpi_drv_struct ibm_bay_acpidriver = {
3464         .notify = bay_notify,
3465         .handle = &bay_handle,
3466         .type = ACPI_SYSTEM_NOTIFY,
3467 };
3468
3469 static struct ibm_struct bay_driver_data = {
3470         .name = "bay",
3471         .read = bay_read,
3472         .write = bay_write,
3473         .acpi = &ibm_bay_acpidriver,
3474 };
3475
3476 #endif /* CONFIG_THINKPAD_ACPI_BAY */
3477
3478 /*************************************************************************
3479  * CMOS subdriver
3480  */
3481
3482 /* sysfs cmos_command -------------------------------------------------- */
3483 static ssize_t cmos_command_store(struct device *dev,
3484                             struct device_attribute *attr,
3485                             const char *buf, size_t count)
3486 {
3487         unsigned long cmos_cmd;
3488         int res;
3489
3490         if (parse_strtoul(buf, 21, &cmos_cmd))
3491                 return -EINVAL;
3492
3493         res = issue_thinkpad_cmos_command(cmos_cmd);
3494         return (res)? res : count;
3495 }
3496
3497 static struct device_attribute dev_attr_cmos_command =
3498         __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store);
3499
3500 /* --------------------------------------------------------------------- */
3501
3502 static int __init cmos_init(struct ibm_init_struct *iibm)
3503 {
3504         int res;
3505
3506         vdbg_printk(TPACPI_DBG_INIT,
3507                 "initializing cmos commands subdriver\n");
3508
3509         TPACPI_ACPIHANDLE_INIT(cmos);
3510
3511         vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n",
3512                 str_supported(cmos_handle != NULL));
3513
3514         res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3515         if (res)
3516                 return res;
3517
3518         return (cmos_handle)? 0 : 1;
3519 }
3520
3521 static void cmos_exit(void)
3522 {
3523         device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command);
3524 }
3525
3526 static int cmos_read(char *p)
3527 {
3528         int len = 0;
3529
3530         /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p,
3531            R30, R31, T20-22, X20-21 */
3532         if (!cmos_handle)
3533                 len += sprintf(p + len, "status:\t\tnot supported\n");
3534         else {
3535                 len += sprintf(p + len, "status:\t\tsupported\n");
3536                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-21)\n");
3537         }
3538
3539         return len;
3540 }
3541
3542 static int cmos_write(char *buf)
3543 {
3544         char *cmd;
3545         int cmos_cmd, res;
3546
3547         while ((cmd = next_cmd(&buf))) {
3548                 if (sscanf(cmd, "%u", &cmos_cmd) == 1 &&
3549                     cmos_cmd >= 0 && cmos_cmd <= 21) {
3550                         /* cmos_cmd set */
3551                 } else
3552                         return -EINVAL;
3553
3554                 res = issue_thinkpad_cmos_command(cmos_cmd);
3555                 if (res)
3556                         return res;
3557         }
3558
3559         return 0;
3560 }
3561
3562 static struct ibm_struct cmos_driver_data = {
3563         .name = "cmos",
3564         .read = cmos_read,
3565         .write = cmos_write,
3566         .exit = cmos_exit,
3567 };
3568
3569 /*************************************************************************
3570  * LED subdriver
3571  */
3572
3573 enum led_access_mode {
3574         TPACPI_LED_NONE = 0,
3575         TPACPI_LED_570, /* 570 */
3576         TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3577         TPACPI_LED_NEW, /* all others */
3578 };
3579
3580 enum {  /* For TPACPI_LED_OLD */
3581         TPACPI_LED_EC_HLCL = 0x0c,      /* EC reg to get led to power on */
3582         TPACPI_LED_EC_HLBL = 0x0d,      /* EC reg to blink a lit led */
3583         TPACPI_LED_EC_HLMS = 0x0e,      /* EC reg to select led to command */
3584 };
3585
3586 static enum led_access_mode led_supported;
3587
3588 TPACPI_HANDLE(led, ec, "SLED",  /* 570 */
3589            "SYSL",              /* 600e/x, 770e, 770x, A21e, A2xm/p, */
3590                                 /* T20-22, X20-21 */
3591            "LED",               /* all others */
3592            );                   /* R30, R31 */
3593
3594 static int __init led_init(struct ibm_init_struct *iibm)
3595 {
3596         vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n");
3597
3598         TPACPI_ACPIHANDLE_INIT(led);
3599
3600         if (!led_handle)
3601                 /* led not supported on R30, R31 */
3602                 led_supported = TPACPI_LED_NONE;
3603         else if (strlencmp(led_path, "SLED") == 0)
3604                 /* 570 */
3605                 led_supported = TPACPI_LED_570;
3606         else if (strlencmp(led_path, "SYSL") == 0)
3607                 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */
3608                 led_supported = TPACPI_LED_OLD;
3609         else
3610                 /* all others */
3611                 led_supported = TPACPI_LED_NEW;
3612
3613         vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n",
3614                 str_supported(led_supported), led_supported);
3615
3616         return (led_supported != TPACPI_LED_NONE)? 0 : 1;
3617 }
3618
3619 #define led_status(s) ((s) == 0 ? "off" : ((s) == 1 ? "on" : "blinking"))
3620
3621 static int led_read(char *p)
3622 {
3623         int len = 0;
3624
3625         if (!led_supported) {
3626                 len += sprintf(p + len, "status:\t\tnot supported\n");
3627                 return len;
3628         }
3629         len += sprintf(p + len, "status:\t\tsupported\n");
3630
3631         if (led_supported == TPACPI_LED_570) {
3632                 /* 570 */
3633                 int i, status;
3634                 for (i = 0; i < 8; i++) {
3635                         if (!acpi_evalf(ec_handle,
3636                                         &status, "GLED", "dd", 1 << i))
3637                                 return -EIO;
3638                         len += sprintf(p + len, "%d:\t\t%s\n",
3639                                        i, led_status(status));
3640                 }
3641         }
3642
3643         len += sprintf(p + len, "commands:\t"
3644                        "<led> on, <led> off, <led> blink (<led> is 0-7)\n");
3645
3646         return len;
3647 }
3648
3649 /* off, on, blink */
3650 static const int led_sled_arg1[] = { 0, 1, 3 };
3651 static const int led_exp_hlbl[] = { 0, 0, 1 };  /* led# * */
3652 static const int led_exp_hlcl[] = { 0, 1, 1 };  /* led# * */
3653 static const int led_led_arg1[] = { 0, 0x80, 0xc0 };
3654
3655 static int led_write(char *buf)
3656 {
3657         char *cmd;
3658         int led, ind, ret;
3659
3660         if (!led_supported)
3661                 return -ENODEV;
3662
3663         while ((cmd = next_cmd(&buf))) {
3664                 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 7)
3665                         return -EINVAL;
3666
3667                 if (strstr(cmd, "off")) {
3668                         ind = 0;
3669                 } else if (strstr(cmd, "on")) {
3670                         ind = 1;
3671                 } else if (strstr(cmd, "blink")) {
3672                         ind = 2;
3673                 } else
3674                         return -EINVAL;
3675
3676                 if (led_supported == TPACPI_LED_570) {
3677                         /* 570 */
3678                         led = 1 << led;
3679                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3680                                         led, led_sled_arg1[ind]))
3681                                 return -EIO;
3682                 } else if (led_supported == TPACPI_LED_OLD) {
3683                         /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
3684                         led = 1 << led;
3685                         ret = ec_write(TPACPI_LED_EC_HLMS, led);
3686                         if (ret >= 0)
3687                                 ret = ec_write(TPACPI_LED_EC_HLBL,
3688                                                 led * led_exp_hlbl[ind]);
3689                         if (ret >= 0)
3690                                 ret = ec_write(TPACPI_LED_EC_HLCL,
3691                                                 led * led_exp_hlcl[ind]);
3692                         if (ret < 0)
3693                                 return ret;
3694                 } else {
3695                         /* all others */
3696                         if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
3697                                         led, led_led_arg1[ind]))
3698                                 return -EIO;
3699                 }
3700         }
3701
3702         return 0;
3703 }
3704
3705 static struct ibm_struct led_driver_data = {
3706         .name = "led",
3707         .read = led_read,
3708         .write = led_write,
3709 };
3710
3711 /*************************************************************************
3712  * Beep subdriver
3713  */
3714
3715 TPACPI_HANDLE(beep, ec, "BEEP");        /* all except R30, R31 */
3716
3717 static int __init beep_init(struct ibm_init_struct *iibm)
3718 {
3719         vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n");
3720
3721         TPACPI_ACPIHANDLE_INIT(beep);
3722
3723         vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n",
3724                 str_supported(beep_handle != NULL));
3725
3726         return (beep_handle)? 0 : 1;
3727 }
3728
3729 static int beep_read(char *p)
3730 {
3731         int len = 0;
3732
3733         if (!beep_handle)
3734                 len += sprintf(p + len, "status:\t\tnot supported\n");
3735         else {
3736                 len += sprintf(p + len, "status:\t\tsupported\n");
3737                 len += sprintf(p + len, "commands:\t<cmd> (<cmd> is 0-17)\n");
3738         }
3739
3740         return len;
3741 }
3742
3743 static int beep_write(char *buf)
3744 {
3745         char *cmd;
3746         int beep_cmd;
3747
3748         if (!beep_handle)
3749                 return -ENODEV;
3750
3751         while ((cmd = next_cmd(&buf))) {
3752                 if (sscanf(cmd, "%u", &beep_cmd) == 1 &&
3753                     beep_cmd >= 0 && beep_cmd <= 17) {
3754                         /* beep_cmd set */
3755                 } else
3756                         return -EINVAL;
3757                 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", beep_cmd, 0))
3758                         return -EIO;
3759         }
3760
3761         return 0;
3762 }
3763
3764 static struct ibm_struct beep_driver_data = {
3765         .name = "beep",
3766         .read = beep_read,
3767         .write = beep_write,
3768 };
3769
3770 /*************************************************************************
3771  * Thermal subdriver
3772  */
3773
3774 enum thermal_access_mode {
3775         TPACPI_THERMAL_NONE = 0,        /* No thermal support */
3776         TPACPI_THERMAL_ACPI_TMP07,      /* Use ACPI TMP0-7 */
3777         TPACPI_THERMAL_ACPI_UPDT,       /* Use ACPI TMP0-7 with UPDT */
3778         TPACPI_THERMAL_TPEC_8,          /* Use ACPI EC regs, 8 sensors */
3779         TPACPI_THERMAL_TPEC_16,         /* Use ACPI EC regs, 16 sensors */
3780 };
3781
3782 enum { /* TPACPI_THERMAL_TPEC_* */
3783         TP_EC_THERMAL_TMP0 = 0x78,      /* ACPI EC regs TMP 0..7 */
3784         TP_EC_THERMAL_TMP8 = 0xC0,      /* ACPI EC regs TMP 8..15 */
3785         TP_EC_THERMAL_TMP_NA = -128,    /* ACPI EC sensor not available */
3786 };
3787
3788 #define TPACPI_MAX_THERMAL_SENSORS 16   /* Max thermal sensors supported */
3789 struct ibm_thermal_sensors_struct {
3790         s32 temp[TPACPI_MAX_THERMAL_SENSORS];
3791 };
3792
3793 static enum thermal_access_mode thermal_read_mode;
3794
3795 /* idx is zero-based */
3796 static int thermal_get_sensor(int idx, s32 *value)
3797 {
3798         int t;
3799         s8 tmp;
3800         char tmpi[5];
3801
3802         t = TP_EC_THERMAL_TMP0;
3803
3804         switch (thermal_read_mode) {
3805 #if TPACPI_MAX_THERMAL_SENSORS >= 16
3806         case TPACPI_THERMAL_TPEC_16:
3807                 if (idx >= 8 && idx <= 15) {
3808                         t = TP_EC_THERMAL_TMP8;
3809                         idx -= 8;
3810                 }
3811                 /* fallthrough */
3812 #endif
3813         case TPACPI_THERMAL_TPEC_8:
3814                 if (idx <= 7) {
3815                         if (!acpi_ec_read(t + idx, &tmp))
3816                                 return -EIO;
3817                         *value = tmp * 1000;
3818                         return 0;
3819                 }
3820                 break;
3821
3822         case TPACPI_THERMAL_ACPI_UPDT:
3823                 if (idx <= 7) {
3824                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3825                         if (!acpi_evalf(ec_handle, NULL, "UPDT", "v"))
3826                                 return -EIO;
3827                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3828                                 return -EIO;
3829                         *value = (t - 2732) * 100;
3830                         return 0;
3831                 }
3832                 break;
3833
3834         case TPACPI_THERMAL_ACPI_TMP07:
3835                 if (idx <= 7) {
3836                         snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx);
3837                         if (!acpi_evalf(ec_handle, &t, tmpi, "d"))
3838                                 return -EIO;
3839                         if (t > 127 || t < -127)
3840                                 t = TP_EC_THERMAL_TMP_NA;
3841                         *value = t * 1000;
3842                         return 0;
3843                 }
3844                 break;
3845
3846         case TPACPI_THERMAL_NONE:
3847         default:
3848                 return -ENOSYS;
3849         }
3850
3851         return -EINVAL;
3852 }
3853
3854 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s)
3855 {
3856         int res, i;
3857         int n;
3858
3859         n = 8;
3860         i = 0;
3861
3862         if (!s)
3863                 return -EINVAL;
3864
3865         if (thermal_read_mode == TPACPI_THERMAL_TPEC_16)
3866                 n = 16;
3867
3868         for (i = 0 ; i < n; i++) {
3869                 res = thermal_get_sensor(i, &s->temp[i]);
3870                 if (res)
3871                         return res;
3872         }
3873
3874         return n;
3875 }
3876
3877 /* sysfs temp##_input -------------------------------------------------- */
3878
3879 static ssize_t thermal_temp_input_show(struct device *dev,
3880                            struct device_attribute *attr,
3881                            char *buf)
3882 {
3883         struct sensor_device_attribute *sensor_attr =
3884                                         to_sensor_dev_attr(attr);
3885         int idx = sensor_attr->index;
3886         s32 value;
3887         int res;
3888
3889         res = thermal_get_sensor(idx, &value);
3890         if (res)
3891                 return res;
3892         if (value == TP_EC_THERMAL_TMP_NA * 1000)
3893                 return -ENXIO;
3894
3895         return snprintf(buf, PAGE_SIZE, "%d\n", value);
3896 }
3897
3898 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \
3899          SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \
3900                      thermal_temp_input_show, NULL, _idxB)
3901
3902 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = {
3903         THERMAL_SENSOR_ATTR_TEMP(1, 0),
3904         THERMAL_SENSOR_ATTR_TEMP(2, 1),
3905         THERMAL_SENSOR_ATTR_TEMP(3, 2),
3906         THERMAL_SENSOR_ATTR_TEMP(4, 3),
3907         THERMAL_SENSOR_ATTR_TEMP(5, 4),
3908         THERMAL_SENSOR_ATTR_TEMP(6, 5),
3909         THERMAL_SENSOR_ATTR_TEMP(7, 6),
3910         THERMAL_SENSOR_ATTR_TEMP(8, 7),
3911         THERMAL_SENSOR_ATTR_TEMP(9, 8),
3912         THERMAL_SENSOR_ATTR_TEMP(10, 9),
3913         THERMAL_SENSOR_ATTR_TEMP(11, 10),
3914         THERMAL_SENSOR_ATTR_TEMP(12, 11),
3915         THERMAL_SENSOR_ATTR_TEMP(13, 12),
3916         THERMAL_SENSOR_ATTR_TEMP(14, 13),
3917         THERMAL_SENSOR_ATTR_TEMP(15, 14),
3918         THERMAL_SENSOR_ATTR_TEMP(16, 15),
3919 };
3920
3921 #define THERMAL_ATTRS(X) \
3922         &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr
3923
3924 static struct attribute *thermal_temp_input_attr[] = {
3925         THERMAL_ATTRS(8),
3926         THERMAL_ATTRS(9),
3927         THERMAL_ATTRS(10),
3928         THERMAL_ATTRS(11),
3929         THERMAL_ATTRS(12),
3930         THERMAL_ATTRS(13),
3931         THERMAL_ATTRS(14),
3932         THERMAL_ATTRS(15),
3933         THERMAL_ATTRS(0),
3934         THERMAL_ATTRS(1),
3935         THERMAL_ATTRS(2),
3936         THERMAL_ATTRS(3),
3937         THERMAL_ATTRS(4),
3938         THERMAL_ATTRS(5),
3939         THERMAL_ATTRS(6),
3940         THERMAL_ATTRS(7),
3941         NULL
3942 };
3943
3944 static const struct attribute_group thermal_temp_input16_group = {
3945         .attrs = thermal_temp_input_attr
3946 };
3947
3948 static const struct attribute_group thermal_temp_input8_group = {
3949         .attrs = &thermal_temp_input_attr[8]
3950 };
3951
3952 #undef THERMAL_SENSOR_ATTR_TEMP
3953 #undef THERMAL_ATTRS
3954
3955 /* --------------------------------------------------------------------- */
3956
3957 static int __init thermal_init(struct ibm_init_struct *iibm)
3958 {
3959         u8 t, ta1, ta2;
3960         int i;
3961         int acpi_tmp7;
3962         int res;
3963
3964         vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n");
3965
3966         acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv");
3967
3968         if (thinkpad_id.ec_model) {
3969                 /*
3970                  * Direct EC access mode: sensors at registers
3971                  * 0x78-0x7F, 0xC0-0xC7.  Registers return 0x00 for
3972                  * non-implemented, thermal sensors return 0x80 when
3973                  * not available
3974                  */
3975
3976                 ta1 = ta2 = 0;
3977                 for (i = 0; i < 8; i++) {
3978                         if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) {
3979                                 ta1 |= t;
3980                         } else {
3981                                 ta1 = 0;
3982                                 break;
3983                         }
3984                         if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) {
3985                                 ta2 |= t;
3986                         } else {
3987                                 ta1 = 0;
3988                                 break;
3989                         }
3990                 }
3991                 if (ta1 == 0) {
3992                         /* This is sheer paranoia, but we handle it anyway */
3993                         if (acpi_tmp7) {
3994                                 printk(TPACPI_ERR
3995                                        "ThinkPad ACPI EC access misbehaving, "
3996                                        "falling back to ACPI TMPx access "
3997                                        "mode\n");
3998                                 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
3999                         } else {
4000                                 printk(TPACPI_ERR
4001                                        "ThinkPad ACPI EC access misbehaving, "
4002                                        "disabling thermal sensors access\n");
4003                                 thermal_read_mode = TPACPI_THERMAL_NONE;
4004                         }
4005                 } else {
4006                         thermal_read_mode =
4007                             (ta2 != 0) ?
4008                             TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8;
4009                 }
4010         } else if (acpi_tmp7) {
4011                 if (acpi_evalf(ec_handle, NULL, "UPDT", "qv")) {
4012                         /* 600e/x, 770e, 770x */
4013                         thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT;
4014                 } else {
4015                         /* Standard ACPI TMPx access, max 8 sensors */
4016                         thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07;
4017                 }
4018         } else {
4019                 /* temperatures not supported on 570, G4x, R30, R31, R32 */
4020                 thermal_read_mode = TPACPI_THERMAL_NONE;
4021         }
4022
4023         vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n",
4024                 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE),
4025                 thermal_read_mode);
4026
4027         switch (thermal_read_mode) {
4028         case TPACPI_THERMAL_TPEC_16:
4029                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4030                                 &thermal_temp_input16_group);
4031                 if (res)
4032                         return res;
4033                 break;
4034         case TPACPI_THERMAL_TPEC_8:
4035         case TPACPI_THERMAL_ACPI_TMP07:
4036         case TPACPI_THERMAL_ACPI_UPDT:
4037                 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
4038                                 &thermal_temp_input8_group);
4039                 if (res)
4040                         return res;
4041                 break;
4042         case TPACPI_THERMAL_NONE:
4043         default:
4044                 return 1;
4045         }
4046
4047         return 0;
4048 }
4049
4050 static void thermal_exit(void)
4051 {
4052         switch (thermal_read_mode) {
4053         case TPACPI_THERMAL_TPEC_16:
4054                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4055                                    &thermal_temp_input16_group);
4056                 break;
4057         case TPACPI_THERMAL_TPEC_8:
4058         case TPACPI_THERMAL_ACPI_TMP07:
4059         case TPACPI_THERMAL_ACPI_UPDT:
4060                 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj,
4061                                    &thermal_temp_input16_group);
4062                 break;
4063         case TPACPI_THERMAL_NONE:
4064         default:
4065                 break;
4066         }
4067 }
4068
4069 static int thermal_read(char *p)
4070 {
4071         int len = 0;
4072         int n, i;
4073         struct ibm_thermal_sensors_struct t;
4074
4075         n = thermal_get_sensors(&t);
4076         if (unlikely(n < 0))
4077                 return n;
4078
4079         len += sprintf(p + len, "temperatures:\t");
4080
4081         if (n > 0) {
4082                 for (i = 0; i < (n - 1); i++)
4083                         len += sprintf(p + len, "%d ", t.temp[i] / 1000);
4084                 len += sprintf(p + len, "%d\n", t.temp[i] / 1000);
4085         } else
4086                 len += sprintf(p + len, "not supported\n");
4087
4088         return len;
4089 }
4090
4091 static struct ibm_struct thermal_driver_data = {
4092         .name = "thermal",
4093         .read = thermal_read,
4094         .exit = thermal_exit,
4095 };
4096
4097 /*************************************************************************
4098  * EC Dump subdriver
4099  */
4100
4101 static u8 ecdump_regs[256];
4102
4103 static int ecdump_read(char *p)
4104 {
4105         int len = 0;
4106         int i, j;
4107         u8 v;
4108
4109         len += sprintf(p + len, "EC      "
4110                        " +00 +01 +02 +03 +04 +05 +06 +07"
4111                        " +08 +09 +0a +0b +0c +0d +0e +0f\n");
4112         for (i = 0; i < 256; i += 16) {
4113                 len += sprintf(p + len, "EC 0x%02x:", i);
4114                 for (j = 0; j < 16; j++) {
4115                         if (!acpi_ec_read(i + j, &v))
4116                                 break;
4117                         if (v != ecdump_regs[i + j])
4118                                 len += sprintf(p + len, " *%02x", v);
4119                         else
4120                                 len += sprintf(p + len, "  %02x", v);
4121                         ecdump_regs[i + j] = v;
4122                 }
4123                 len += sprintf(p + len, "\n");
4124                 if (j != 16)
4125                         break;
4126         }
4127
4128         /* These are way too dangerous to advertise openly... */
4129 #if 0
4130         len += sprintf(p + len, "commands:\t0x<offset> 0x<value>"
4131                        " (<offset> is 00-ff, <value> is 00-ff)\n");
4132         len += sprintf(p + len, "commands:\t0x<offset> <value>  "
4133                        " (<offset> is 00-ff, <value> is 0-255)\n");
4134 #endif
4135         return len;
4136 }
4137
4138 static int ecdump_write(char *buf)
4139 {
4140         char *cmd;
4141         int i, v;
4142
4143         while ((cmd = next_cmd(&buf))) {
4144                 if (sscanf(cmd, "0x%x 0x%x", &i, &v) == 2) {
4145                         /* i and v set */
4146                 } else if (sscanf(cmd, "0x%x %u", &i, &v) == 2) {
4147                         /* i and v set */
4148                 } else
4149                         return -EINVAL;
4150                 if (i >= 0 && i < 256 && v >= 0 && v < 256) {
4151                         if (!acpi_ec_write(i, v))
4152                                 return -EIO;
4153                 } else
4154                         return -EINVAL;
4155         }
4156
4157         return 0;
4158 }
4159
4160 static struct ibm_struct ecdump_driver_data = {
4161         .name = "ecdump",
4162         .read = ecdump_read,
4163         .write = ecdump_write,
4164         .flags.experimental = 1,
4165 };
4166
4167 /*************************************************************************
4168  * Backlight/brightness subdriver
4169  */
4170
4171 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen"
4172
4173 static struct backlight_device *ibm_backlight_device;
4174 static int brightness_offset = 0x31;
4175 static int brightness_mode;
4176 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */
4177
4178 static struct mutex brightness_mutex;
4179
4180 /*
4181  * ThinkPads can read brightness from two places: EC 0x31, or
4182  * CMOS NVRAM byte 0x5E, bits 0-3.
4183  */
4184 static int brightness_get(struct backlight_device *bd)
4185 {
4186         u8 lec = 0, lcmos = 0, level = 0;
4187
4188         if (brightness_mode & 1) {
4189                 if (!acpi_ec_read(brightness_offset, &lec))
4190                         return -EIO;
4191                 lec &= (tp_features.bright_16levels)? 0x0f : 0x07;
4192                 level = lec;
4193         };
4194         if (brightness_mode & 2) {
4195                 lcmos = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS)
4196                          & TP_NVRAM_MASK_LEVEL_BRIGHTNESS)
4197                         >> TP_NVRAM_POS_LEVEL_BRIGHTNESS;
4198                 lcmos &= (tp_features.bright_16levels)? 0x0f : 0x07;
4199                 level = lcmos;
4200         }
4201
4202         if (brightness_mode == 3 && lec != lcmos) {
4203                 printk(TPACPI_ERR
4204                         "CMOS NVRAM (%u) and EC (%u) do not agree "
4205                         "on display brightness level\n",
4206                         (unsigned int) lcmos,
4207                         (unsigned int) lec);
4208                 return -EIO;
4209         }
4210
4211         return level;
4212 }
4213
4214 /* May return EINTR which can always be mapped to ERESTARTSYS */
4215 static int brightness_set(int value)
4216 {
4217         int cmos_cmd, inc, i, res;
4218         int current_value;
4219
4220         if (value > ((tp_features.bright_16levels)? 15 : 7))
4221                 return -EINVAL;
4222
4223         res = mutex_lock_interruptible(&brightness_mutex);
4224         if (res < 0)
4225                 return res;
4226
4227         current_value = brightness_get(NULL);
4228         if (current_value < 0) {
4229                 res = current_value;
4230                 goto errout;
4231         }
4232
4233         cmos_cmd = value > current_value ?
4234                         TP_CMOS_BRIGHTNESS_UP :
4235                         TP_CMOS_BRIGHTNESS_DOWN;
4236         inc = (value > current_value)? 1 : -1;
4237
4238         res = 0;
4239         for (i = current_value; i != value; i += inc) {
4240                 if ((brightness_mode & 2) &&
4241                     issue_thinkpad_cmos_command(cmos_cmd)) {
4242                         res = -EIO;
4243                         goto errout;
4244                 }
4245                 if ((brightness_mode & 1) &&
4246                     !acpi_ec_write(brightness_offset, i + inc)) {
4247                         res = -EIO;
4248                         goto errout;;
4249                 }
4250         }
4251
4252 errout:
4253         mutex_unlock(&brightness_mutex);
4254         return res;
4255 }
4256
4257 /* sysfs backlight class ----------------------------------------------- */
4258
4259 static int brightness_update_status(struct backlight_device *bd)
4260 {
4261         /* it is the backlight class's job (caller) to handle
4262          * EINTR and other errors properly */
4263         return brightness_set(
4264                 (bd->props.fb_blank == FB_BLANK_UNBLANK &&
4265                  bd->props.power == FB_BLANK_UNBLANK) ?
4266                                 bd->props.brightness : 0);
4267 }
4268
4269 static struct backlight_ops ibm_backlight_data = {
4270         .get_brightness = brightness_get,
4271         .update_status  = brightness_update_status,
4272 };
4273
4274 /* --------------------------------------------------------------------- */
4275
4276 static int __init tpacpi_query_bcll_levels(acpi_handle handle)
4277 {
4278         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
4279         union acpi_object *obj;
4280         int rc;
4281
4282         if (ACPI_SUCCESS(acpi_evaluate_object(handle, NULL, NULL, &buffer))) {
4283                 obj = (union acpi_object *)buffer.pointer;
4284                 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) {
4285                         printk(TPACPI_ERR "Unknown BCLL data, "
4286                                "please report this to %s\n", TPACPI_MAIL);
4287                         rc = 0;
4288                 } else {
4289                         rc = obj->package.count;
4290                 }
4291         } else {
4292                 return 0;
4293         }
4294
4295         kfree(buffer.pointer);
4296         return rc;
4297 }
4298
4299 static acpi_status __init brightness_find_bcll(acpi_handle handle, u32 lvl,
4300                                         void *context, void **rv)
4301 {
4302         char name[ACPI_PATH_SEGMENT_LENGTH];
4303         struct acpi_buffer buffer = { sizeof(name), &name };
4304
4305         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4306             !strncmp("BCLL", name, sizeof(name) - 1)) {
4307                 if (tpacpi_query_bcll_levels(handle) == 16) {
4308                         *rv = handle;
4309                         return AE_CTRL_TERMINATE;
4310                 } else {
4311                         return AE_OK;
4312                 }
4313         } else {
4314                 return AE_OK;
4315         }
4316 }
4317
4318 static int __init brightness_check_levels(void)
4319 {
4320         int status;
4321         void *found_node = NULL;
4322
4323         if (!vid_handle) {
4324                 TPACPI_ACPIHANDLE_INIT(vid);
4325         }
4326         if (!vid_handle)
4327                 return 0;
4328
4329         /* Search for a BCLL package with 16 levels */
4330         status = acpi_walk_namespace(ACPI_TYPE_PACKAGE, vid_handle, 3,
4331                                         brightness_find_bcll, NULL,
4332                                         &found_node);
4333
4334         return (ACPI_SUCCESS(status) && found_node != NULL);
4335 }
4336
4337 static acpi_status __init brightness_find_bcl(acpi_handle handle, u32 lvl,
4338                                         void *context, void **rv)
4339 {
4340         char name[ACPI_PATH_SEGMENT_LENGTH];
4341         struct acpi_buffer buffer = { sizeof(name), &name };
4342
4343         if (ACPI_SUCCESS(acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer)) &&
4344             !strncmp("_BCL", name, sizeof(name) - 1)) {
4345                 *rv = handle;
4346                 return AE_CTRL_TERMINATE;
4347         } else {
4348                 return AE_OK;
4349         }
4350 }
4351
4352 static int __init brightness_check_std_acpi_support(void)
4353 {
4354         int status;
4355         void *found_node = NULL;
4356
4357         if (!vid_handle) {
4358                 TPACPI_ACPIHANDLE_INIT(vid);
4359         }
4360         if (!vid_handle)
4361                 return 0;
4362
4363         /* Search for a _BCL method, but don't execute it */
4364         status = acpi_walk_namespace(ACPI_TYPE_METHOD, vid_handle, 3,
4365                                      brightness_find_bcl, NULL, &found_node);
4366
4367         return (ACPI_SUCCESS(status) && found_node != NULL);
4368 }
4369
4370 static int __init brightness_init(struct ibm_init_struct *iibm)
4371 {
4372         int b;
4373
4374         vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n");
4375
4376         mutex_init(&brightness_mutex);
4377
4378         if (!brightness_enable) {
4379                 dbg_printk(TPACPI_DBG_INIT,
4380                            "brightness support disabled by "
4381                            "module parameter\n");
4382                 return 1;
4383         } else if (brightness_enable > 1) {
4384                 if (brightness_check_std_acpi_support()) {
4385                         printk(TPACPI_NOTICE
4386                                "standard ACPI backlight interface "
4387                                "available, not loading native one...\n");
4388                         return 1;
4389                 }
4390         }
4391
4392         if (!brightness_mode) {
4393                 if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO)
4394                         brightness_mode = 2;
4395                 else
4396                         brightness_mode = 3;
4397
4398                 dbg_printk(TPACPI_DBG_INIT, "selected brightness_mode=%d\n",
4399                         brightness_mode);
4400         }
4401
4402         if (brightness_mode > 3)
4403                 return -EINVAL;
4404
4405         tp_features.bright_16levels =
4406                         thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO &&
4407                         brightness_check_levels();
4408
4409         b = brightness_get(NULL);
4410         if (b < 0)
4411                 return 1;
4412
4413         if (tp_features.bright_16levels)
4414                 printk(TPACPI_INFO
4415                        "detected a 16-level brightness capable ThinkPad\n");
4416
4417         ibm_backlight_device = backlight_device_register(
4418                                         TPACPI_BACKLIGHT_DEV_NAME, NULL, NULL,
4419                                         &ibm_backlight_data);
4420         if (IS_ERR(ibm_backlight_device)) {
4421                 printk(TPACPI_ERR "Could not register backlight device\n");
4422                 return PTR_ERR(ibm_backlight_device);
4423         }
4424         vdbg_printk(TPACPI_DBG_INIT, "brightness is supported\n");
4425
4426         ibm_backlight_device->props.max_brightness =
4427                                 (tp_features.bright_16levels)? 15 : 7;
4428         ibm_backlight_device->props.brightness = b;
4429         backlight_update_status(ibm_backlight_device);
4430
4431         return 0;
4432 }
4433
4434 static void brightness_exit(void)
4435 {
4436         if (ibm_backlight_device) {
4437                 vdbg_printk(TPACPI_DBG_EXIT,
4438                             "calling backlight_device_unregister()\n");
4439                 backlight_device_unregister(ibm_backlight_device);
4440                 ibm_backlight_device = NULL;
4441         }
4442 }
4443
4444 static int brightness_read(char *p)
4445 {
4446         int len = 0;
4447         int level;
4448
4449         level = brightness_get(NULL);
4450         if (level < 0) {
4451                 len += sprintf(p + len, "level:\t\tunreadable\n");
4452         } else {
4453                 len += sprintf(p + len, "level:\t\t%d\n", level);
4454                 len += sprintf(p + len, "commands:\tup, down\n");
4455                 len += sprintf(p + len, "commands:\tlevel <level>"
4456                                " (<level> is 0-%d)\n",
4457                                (tp_features.bright_16levels) ? 15 : 7);
4458         }
4459
4460         return len;
4461 }
4462
4463 static int brightness_write(char *buf)
4464 {
4465         int level;
4466         int rc;
4467         char *cmd;
4468         int max_level = (tp_features.bright_16levels) ? 15 : 7;
4469
4470         level = brightness_get(NULL);
4471         if (level < 0)
4472                 return level;
4473
4474         while ((cmd = next_cmd(&buf))) {
4475                 if (strlencmp(cmd, "up") == 0) {
4476                         if (level < max_level)
4477                                 level++;
4478                 } else if (strlencmp(cmd, "down") == 0) {
4479                         if (level > 0)
4480                                 level--;
4481                 } else if (sscanf(cmd, "level %d", &level) == 1 &&
4482                            level >= 0 && level <= max_level) {
4483                         /* new level set */
4484                 } else
4485                         return -EINVAL;
4486         }
4487
4488         /*
4489          * Now we know what the final level should be, so we try to set it.
4490          * Doing it this way makes the syscall restartable in case of EINTR
4491          */
4492         rc = brightness_set(level);
4493         return (rc == -EINTR)? ERESTARTSYS : rc;
4494 }
4495
4496 static struct ibm_struct brightness_driver_data = {
4497         .name = "brightness",
4498         .read = brightness_read,
4499         .write = brightness_write,
4500         .exit = brightness_exit,
4501 };
4502
4503 /*************************************************************************
4504  * Volume subdriver
4505  */
4506
4507 static int volume_offset = 0x30;
4508
4509 static int volume_read(char *p)
4510 {
4511         int len = 0;
4512         u8 level;
4513
4514         if (!acpi_ec_read(volume_offset, &level)) {
4515                 len += sprintf(p + len, "level:\t\tunreadable\n");
4516         } else {
4517                 len += sprintf(p + len, "level:\t\t%d\n", level & 0xf);
4518                 len += sprintf(p + len, "mute:\t\t%s\n", onoff(level, 6));
4519                 len += sprintf(p + len, "commands:\tup, down, mute\n");
4520                 len += sprintf(p + len, "commands:\tlevel <level>"
4521                                " (<level> is 0-15)\n");
4522         }
4523
4524         return len;
4525 }
4526
4527 static int volume_write(char *buf)
4528 {
4529         int cmos_cmd, inc, i;
4530         u8 level, mute;
4531         int new_level, new_mute;
4532         char *cmd;
4533
4534         while ((cmd = next_cmd(&buf))) {
4535                 if (!acpi_ec_read(volume_offset, &level))
4536                         return -EIO;
4537                 new_mute = mute = level & 0x40;
4538                 new_level = level = level & 0xf;
4539
4540                 if (strlencmp(cmd, "up") == 0) {
4541                         if (mute)
4542                                 new_mute = 0;
4543                         else
4544                                 new_level = level == 15 ? 15 : level + 1;
4545                 } else if (strlencmp(cmd, "down") == 0) {
4546                         if (mute)
4547                                 new_mute = 0;
4548                         else
4549                                 new_level = level == 0 ? 0 : level - 1;
4550                 } else if (sscanf(cmd, "level %d", &new_level) == 1 &&
4551                            new_level >= 0 && new_level <= 15) {
4552                         /* new_level set */
4553                 } else if (strlencmp(cmd, "mute") == 0) {
4554                         new_mute = 0x40;
4555                 } else
4556                         return -EINVAL;
4557
4558                 if (new_level != level) {
4559                         /* mute doesn't change */
4560
4561                         cmos_cmd = (new_level > level) ?
4562                                         TP_CMOS_VOLUME_UP : TP_CMOS_VOLUME_DOWN;
4563                         inc = new_level > level ? 1 : -1;
4564
4565                         if (mute && (issue_thinkpad_cmos_command(cmos_cmd) ||
4566                                      !acpi_ec_write(volume_offset, level)))
4567                                 return -EIO;
4568
4569                         for (i = level; i != new_level; i += inc)
4570                                 if (issue_thinkpad_cmos_command(cmos_cmd) ||
4571                                     !acpi_ec_write(volume_offset, i + inc))
4572                                         return -EIO;
4573
4574                         if (mute &&
4575                             (issue_thinkpad_cmos_command(TP_CMOS_VOLUME_MUTE) ||
4576                              !acpi_ec_write(volume_offset, new_level + mute))) {
4577                                 return -EIO;
4578                         }
4579                 }
4580
4581                 if (new_mute != mute) {
4582                         /* level doesn't change */
4583
4584                         cmos_cmd = (new_mute) ?
4585                                    TP_CMOS_VOLUME_MUTE : TP_CMOS_VOLUME_UP;
4586
4587                         if (issue_thinkpad_cmos_command(cmos_cmd) ||
4588                             !acpi_ec_write(volume_offset, level + new_mute))
4589                                 return -EIO;
4590                 }
4591         }
4592
4593         return 0;
4594 }
4595
4596 static struct ibm_struct volume_driver_data = {
4597         .name = "volume",
4598         .read = volume_read,
4599         .write = volume_write,
4600 };
4601
4602 /*************************************************************************
4603  * Fan subdriver
4604  */
4605
4606 /*
4607  * FAN ACCESS MODES
4608  *
4609  * TPACPI_FAN_RD_ACPI_GFAN:
4610  *      ACPI GFAN method: returns fan level
4611  *
4612  *      see TPACPI_FAN_WR_ACPI_SFAN
4613  *      EC 0x2f (HFSP) not available if GFAN exists
4614  *
4615  * TPACPI_FAN_WR_ACPI_SFAN:
4616  *      ACPI SFAN method: sets fan level, 0 (stop) to 7 (max)
4617  *
4618  *      EC 0x2f (HFSP) might be available *for reading*, but do not use
4619  *      it for writing.
4620  *
4621  * TPACPI_FAN_WR_TPEC:
4622  *      ThinkPad EC register 0x2f (HFSP): fan control loop mode
4623  *      Supported on almost all ThinkPads
4624  *
4625  *      Fan speed changes of any sort (including those caused by the
4626  *      disengaged mode) are usually done slowly by the firmware as the
4627  *      maximum ammount of fan duty cycle change per second seems to be
4628  *      limited.
4629  *
4630  *      Reading is not available if GFAN exists.
4631  *      Writing is not available if SFAN exists.
4632  *
4633  *      Bits
4634  *       7      automatic mode engaged;
4635  *              (default operation mode of the ThinkPad)
4636  *              fan level is ignored in this mode.
4637  *       6      full speed mode (takes precedence over bit 7);
4638  *              not available on all thinkpads.  May disable
4639  *              the tachometer while the fan controller ramps up
4640  *              the speed (which can take up to a few *minutes*).
4641  *              Speeds up fan to 100% duty-cycle, which is far above
4642  *              the standard RPM levels.  It is not impossible that
4643  *              it could cause hardware damage.
4644  *      5-3     unused in some models.  Extra bits for fan level
4645  *              in others, but still useless as all values above
4646  *              7 map to the same speed as level 7 in these models.
4647  *      2-0     fan level (0..7 usually)
4648  *                      0x00 = stop
4649  *                      0x07 = max (set when temperatures critical)
4650  *              Some ThinkPads may have other levels, see
4651  *              TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41)
4652  *
4653  *      FIRMWARE BUG: on some models, EC 0x2f might not be initialized at
4654  *      boot. Apparently the EC does not intialize it, so unless ACPI DSDT
4655  *      does so, its initial value is meaningless (0x07).
4656  *
4657  *      For firmware bugs, refer to:
4658  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4659  *
4660  *      ----
4661  *
4662  *      ThinkPad EC register 0x84 (LSB), 0x85 (MSB):
4663  *      Main fan tachometer reading (in RPM)
4664  *
4665  *      This register is present on all ThinkPads with a new-style EC, and
4666  *      it is known not to be present on the A21m/e, and T22, as there is
4667  *      something else in offset 0x84 according to the ACPI DSDT.  Other
4668  *      ThinkPads from this same time period (and earlier) probably lack the
4669  *      tachometer as well.
4670  *
4671  *      Unfortunately a lot of ThinkPads with new-style ECs but whose firwmare
4672  *      was never fixed by IBM to report the EC firmware version string
4673  *      probably support the tachometer (like the early X models), so
4674  *      detecting it is quite hard.  We need more data to know for sure.
4675  *
4676  *      FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings
4677  *      might result.
4678  *
4679  *      FIRMWARE BUG: may go stale while the EC is switching to full speed
4680  *      mode.
4681  *
4682  *      For firmware bugs, refer to:
4683  *      http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues
4684  *
4685  * TPACPI_FAN_WR_ACPI_FANS:
4686  *      ThinkPad X31, X40, X41.  Not available in the X60.
4687  *
4688  *      FANS ACPI handle: takes three arguments: low speed, medium speed,
4689  *      high speed.  ACPI DSDT seems to map these three speeds to levels
4690  *      as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH
4691  *      (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3")
4692  *
4693  *      The speeds are stored on handles
4694  *      (FANA:FAN9), (FANC:FANB), (FANE:FAND).
4695  *
4696  *      There are three default speed sets, acessible as handles:
4697  *      FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H
4698  *
4699  *      ACPI DSDT switches which set is in use depending on various
4700  *      factors.
4701  *
4702  *      TPACPI_FAN_WR_TPEC is also available and should be used to
4703  *      command the fan.  The X31/X40/X41 seems to have 8 fan levels,
4704  *      but the ACPI tables just mention level 7.
4705  */
4706
4707 enum {                                  /* Fan control constants */
4708         fan_status_offset = 0x2f,       /* EC register 0x2f */
4709         fan_rpm_offset = 0x84,          /* EC register 0x84: LSB, 0x85 MSB (RPM)
4710                                          * 0x84 must be read before 0x85 */
4711
4712         TP_EC_FAN_FULLSPEED = 0x40,     /* EC fan mode: full speed */
4713         TP_EC_FAN_AUTO      = 0x80,     /* EC fan mode: auto fan control */
4714
4715         TPACPI_FAN_LAST_LEVEL = 0x100,  /* Use cached last-seen fan level */
4716 };
4717
4718 enum fan_status_access_mode {
4719         TPACPI_FAN_NONE = 0,            /* No fan status or control */
4720         TPACPI_FAN_RD_ACPI_GFAN,        /* Use ACPI GFAN */
4721         TPACPI_FAN_RD_TPEC,             /* Use ACPI EC regs 0x2f, 0x84-0x85 */
4722 };
4723
4724 enum fan_control_access_mode {
4725         TPACPI_FAN_WR_NONE = 0,         /* No fan control */
4726         TPACPI_FAN_WR_ACPI_SFAN,        /* Use ACPI SFAN */
4727         TPACPI_FAN_WR_TPEC,             /* Use ACPI EC reg 0x2f */
4728         TPACPI_FAN_WR_ACPI_FANS,        /* Use ACPI FANS and EC reg 0x2f */
4729 };
4730
4731 enum fan_control_commands {
4732         TPACPI_FAN_CMD_SPEED    = 0x0001,       /* speed command */
4733         TPACPI_FAN_CMD_LEVEL    = 0x0002,       /* level command  */
4734         TPACPI_FAN_CMD_ENABLE   = 0x0004,       /* enable/disable cmd,
4735                                                  * and also watchdog cmd */
4736 };
4737
4738 static int fan_control_allowed;
4739
4740 static enum fan_status_access_mode fan_status_access_mode;
4741 static enum fan_control_access_mode fan_control_access_mode;
4742 static enum fan_control_commands fan_control_commands;
4743
4744 static u8 fan_control_initial_status;
4745 static u8 fan_control_desired_level;
4746 static int fan_watchdog_maxinterval;
4747
4748 static struct mutex fan_mutex;
4749
4750 static void fan_watchdog_fire(struct work_struct *ignored);
4751 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire);
4752
4753 TPACPI_HANDLE(fans, ec, "FANS");        /* X31, X40, X41 */
4754 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */
4755            "\\FSPD",            /* 600e/x, 770e, 770x */
4756            );                   /* all others */
4757 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */
4758            "JFNS",              /* 770x-JL */
4759            );                   /* all others */
4760
4761 /*
4762  * Call with fan_mutex held
4763  */
4764 static void fan_update_desired_level(u8 status)
4765 {
4766         if ((status &
4767              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
4768                 if (status > 7)
4769                         fan_control_desired_level = 7;
4770                 else
4771                         fan_control_desired_level = status;
4772         }
4773 }
4774
4775 static int fan_get_status(u8 *status)
4776 {
4777         u8 s;
4778
4779         /* TODO:
4780          * Add TPACPI_FAN_RD_ACPI_FANS ? */
4781
4782         switch (fan_status_access_mode) {
4783         case TPACPI_FAN_RD_ACPI_GFAN:
4784                 /* 570, 600e/x, 770e, 770x */
4785
4786                 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d")))
4787                         return -EIO;
4788
4789                 if (likely(status))
4790                         *status = s & 0x07;
4791
4792                 break;
4793
4794         case TPACPI_FAN_RD_TPEC:
4795                 /* all except 570, 600e/x, 770e, 770x */
4796                 if (unlikely(!acpi_ec_read(fan_status_offset, &s)))
4797                         return -EIO;
4798
4799                 if (likely(status))
4800                         *status = s;
4801
4802                 break;
4803
4804         default:
4805                 return -ENXIO;
4806         }
4807
4808         return 0;
4809 }
4810
4811 static int fan_get_status_safe(u8 *status)
4812 {
4813         int rc;
4814         u8 s;
4815
4816         if (mutex_lock_interruptible(&fan_mutex))
4817                 return -ERESTARTSYS;
4818         rc = fan_get_status(&s);
4819         if (!rc)
4820                 fan_update_desired_level(s);
4821         mutex_unlock(&fan_mutex);
4822
4823         if (status)
4824                 *status = s;
4825
4826         return rc;
4827 }
4828
4829 static int fan_get_speed(unsigned int *speed)
4830 {
4831         u8 hi, lo;
4832
4833         switch (fan_status_access_mode) {
4834         case TPACPI_FAN_RD_TPEC:
4835                 /* all except 570, 600e/x, 770e, 770x */
4836                 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) ||
4837                              !acpi_ec_read(fan_rpm_offset + 1, &hi)))
4838                         return -EIO;
4839
4840                 if (likely(speed))
4841                         *speed = (hi << 8) | lo;
4842
4843                 break;
4844
4845         default:
4846                 return -ENXIO;
4847         }
4848
4849         return 0;
4850 }
4851
4852 static int fan_set_level(int level)
4853 {
4854         if (!fan_control_allowed)
4855                 return -EPERM;
4856
4857         switch (fan_control_access_mode) {
4858         case TPACPI_FAN_WR_ACPI_SFAN:
4859                 if (level >= 0 && level <= 7) {
4860                         if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level))
4861                                 return -EIO;
4862                 } else
4863                         return -EINVAL;
4864                 break;
4865
4866         case TPACPI_FAN_WR_ACPI_FANS:
4867         case TPACPI_FAN_WR_TPEC:
4868                 if ((level != TP_EC_FAN_AUTO) &&
4869                     (level != TP_EC_FAN_FULLSPEED) &&
4870                     ((level < 0) || (level > 7)))
4871                         return -EINVAL;
4872
4873                 /* safety net should the EC not support AUTO
4874                  * or FULLSPEED mode bits and just ignore them */
4875                 if (level & TP_EC_FAN_FULLSPEED)
4876                         level |= 7;     /* safety min speed 7 */
4877                 else if (level & TP_EC_FAN_AUTO)
4878                         level |= 4;     /* safety min speed 4 */
4879
4880                 if (!acpi_ec_write(fan_status_offset, level))
4881                         return -EIO;
4882                 else
4883                         tp_features.fan_ctrl_status_undef = 0;
4884                 break;
4885
4886         default:
4887                 return -ENXIO;
4888         }
4889         return 0;
4890 }
4891
4892 static int fan_set_level_safe(int level)
4893 {
4894         int rc;
4895
4896         if (!fan_control_allowed)
4897                 return -EPERM;
4898
4899         if (mutex_lock_interruptible(&fan_mutex))
4900                 return -ERESTARTSYS;
4901
4902         if (level == TPACPI_FAN_LAST_LEVEL)
4903                 level = fan_control_desired_level;
4904
4905         rc = fan_set_level(level);
4906         if (!rc)
4907                 fan_update_desired_level(level);
4908
4909         mutex_unlock(&fan_mutex);
4910         return rc;
4911 }
4912
4913 static int fan_set_enable(void)
4914 {
4915         u8 s;
4916         int rc;
4917
4918         if (!fan_control_allowed)
4919                 return -EPERM;
4920
4921         if (mutex_lock_interruptible(&fan_mutex))
4922                 return -ERESTARTSYS;
4923
4924         switch (fan_control_access_mode) {
4925         case TPACPI_FAN_WR_ACPI_FANS:
4926         case TPACPI_FAN_WR_TPEC:
4927                 rc = fan_get_status(&s);
4928                 if (rc < 0)
4929                         break;
4930
4931                 /* Don't go out of emergency fan mode */
4932                 if (s != 7) {
4933                         s &= 0x07;
4934                         s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */
4935                 }
4936
4937                 if (!acpi_ec_write(fan_status_offset, s))
4938                         rc = -EIO;
4939                 else {
4940                         tp_features.fan_ctrl_status_undef = 0;
4941                         rc = 0;
4942                 }
4943                 break;
4944
4945         case TPACPI_FAN_WR_ACPI_SFAN:
4946                 rc = fan_get_status(&s);
4947                 if (rc < 0)
4948                         break;
4949
4950                 s &= 0x07;
4951
4952                 /* Set fan to at least level 4 */
4953                 s |= 4;
4954
4955                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s))
4956                         rc = -EIO;
4957                 else
4958                         rc = 0;
4959                 break;
4960
4961         default:
4962                 rc = -ENXIO;
4963         }
4964
4965         mutex_unlock(&fan_mutex);
4966         return rc;
4967 }
4968
4969 static int fan_set_disable(void)
4970 {
4971         int rc;
4972
4973         if (!fan_control_allowed)
4974                 return -EPERM;
4975
4976         if (mutex_lock_interruptible(&fan_mutex))
4977                 return -ERESTARTSYS;
4978
4979         rc = 0;
4980         switch (fan_control_access_mode) {
4981         case TPACPI_FAN_WR_ACPI_FANS:
4982         case TPACPI_FAN_WR_TPEC:
4983                 if (!acpi_ec_write(fan_status_offset, 0x00))
4984                         rc = -EIO;
4985                 else {
4986                         fan_control_desired_level = 0;
4987                         tp_features.fan_ctrl_status_undef = 0;
4988                 }
4989                 break;
4990
4991         case TPACPI_FAN_WR_ACPI_SFAN:
4992                 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00))
4993                         rc = -EIO;
4994                 else
4995                         fan_control_desired_level = 0;
4996                 break;
4997
4998         default:
4999                 rc = -ENXIO;
5000         }
5001
5002
5003         mutex_unlock(&fan_mutex);
5004         return rc;
5005 }
5006
5007 static int fan_set_speed(int speed)
5008 {
5009         int rc;
5010
5011         if (!fan_control_allowed)
5012                 return -EPERM;
5013
5014         if (mutex_lock_interruptible(&fan_mutex))
5015                 return -ERESTARTSYS;
5016
5017         rc = 0;
5018         switch (fan_control_access_mode) {
5019         case TPACPI_FAN_WR_ACPI_FANS:
5020                 if (speed >= 0 && speed <= 65535) {
5021                         if (!acpi_evalf(fans_handle, NULL, NULL, "vddd",
5022                                         speed, speed, speed))
5023                                 rc = -EIO;
5024                 } else
5025                         rc = -EINVAL;
5026                 break;
5027
5028         default:
5029                 rc = -ENXIO;
5030         }
5031
5032         mutex_unlock(&fan_mutex);
5033         return rc;
5034 }
5035
5036 static void fan_watchdog_reset(void)
5037 {
5038         static int fan_watchdog_active;
5039
5040         if (fan_control_access_mode == TPACPI_FAN_WR_NONE)
5041                 return;
5042
5043         if (fan_watchdog_active)
5044                 cancel_delayed_work(&fan_watchdog_task);
5045
5046         if (fan_watchdog_maxinterval > 0 &&
5047             tpacpi_lifecycle != TPACPI_LIFE_EXITING) {
5048                 fan_watchdog_active = 1;
5049                 if (!schedule_delayed_work(&fan_watchdog_task,
5050                                 msecs_to_jiffies(fan_watchdog_maxinterval
5051                                                  * 1000))) {
5052                         printk(TPACPI_ERR
5053                                "failed to schedule the fan watchdog, "
5054                                "watchdog will not trigger\n");
5055                 }
5056         } else
5057                 fan_watchdog_active = 0;
5058 }
5059
5060 static void fan_watchdog_fire(struct work_struct *ignored)
5061 {
5062         int rc;
5063
5064         if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)
5065                 return;
5066
5067         printk(TPACPI_NOTICE "fan watchdog: enabling fan\n");
5068         rc = fan_set_enable();
5069         if (rc < 0) {
5070                 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, "
5071                         "will try again later...\n", -rc);
5072                 /* reschedule for later */
5073                 fan_watchdog_reset();
5074         }
5075 }
5076
5077 /*
5078  * SYSFS fan layout: hwmon compatible (device)
5079  *
5080  * pwm*_enable:
5081  *      0: "disengaged" mode
5082  *      1: manual mode
5083  *      2: native EC "auto" mode (recommended, hardware default)
5084  *
5085  * pwm*: set speed in manual mode, ignored otherwise.
5086  *      0 is level 0; 255 is level 7. Intermediate points done with linear
5087  *      interpolation.
5088  *
5089  * fan*_input: tachometer reading, RPM
5090  *
5091  *
5092  * SYSFS fan layout: extensions
5093  *
5094  * fan_watchdog (driver):
5095  *      fan watchdog interval in seconds, 0 disables (default), max 120
5096  */
5097
5098 /* sysfs fan pwm1_enable ----------------------------------------------- */
5099 static ssize_t fan_pwm1_enable_show(struct device *dev,
5100                                     struct device_attribute *attr,
5101                                     char *buf)
5102 {
5103         int res, mode;
5104         u8 status;
5105
5106         res = fan_get_status_safe(&status);
5107         if (res)
5108                 return res;
5109
5110         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5111                 if (status != fan_control_initial_status) {
5112                         tp_features.fan_ctrl_status_undef = 0;
5113                 } else {
5114                         /* Return most likely status. In fact, it
5115                          * might be the only possible status */
5116                         status = TP_EC_FAN_AUTO;
5117                 }
5118         }
5119
5120         if (status & TP_EC_FAN_FULLSPEED) {
5121                 mode = 0;
5122         } else if (status & TP_EC_FAN_AUTO) {
5123                 mode = 2;
5124         } else
5125                 mode = 1;
5126
5127         return snprintf(buf, PAGE_SIZE, "%d\n", mode);
5128 }
5129
5130 static ssize_t fan_pwm1_enable_store(struct device *dev,
5131                                      struct device_attribute *attr,
5132                                      const char *buf, size_t count)
5133 {
5134         unsigned long t;
5135         int res, level;
5136
5137         if (parse_strtoul(buf, 2, &t))
5138                 return -EINVAL;
5139
5140         switch (t) {
5141         case 0:
5142                 level = TP_EC_FAN_FULLSPEED;
5143                 break;
5144         case 1:
5145                 level = TPACPI_FAN_LAST_LEVEL;
5146                 break;
5147         case 2:
5148                 level = TP_EC_FAN_AUTO;
5149                 break;
5150         case 3:
5151                 /* reserved for software-controlled auto mode */
5152                 return -ENOSYS;
5153         default:
5154                 return -EINVAL;
5155         }
5156
5157         res = fan_set_level_safe(level);
5158         if (res == -ENXIO)
5159                 return -EINVAL;
5160         else if (res < 0)
5161                 return res;
5162
5163         fan_watchdog_reset();
5164
5165         return count;
5166 }
5167
5168 static struct device_attribute dev_attr_fan_pwm1_enable =
5169         __ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
5170                 fan_pwm1_enable_show, fan_pwm1_enable_store);
5171
5172 /* sysfs fan pwm1 ------------------------------------------------------ */
5173 static ssize_t fan_pwm1_show(struct device *dev,
5174                              struct device_attribute *attr,
5175                              char *buf)
5176 {
5177         int res;
5178         u8 status;
5179
5180         res = fan_get_status_safe(&status);
5181         if (res)
5182                 return res;
5183
5184         if (unlikely(tp_features.fan_ctrl_status_undef)) {
5185                 if (status != fan_control_initial_status) {
5186                         tp_features.fan_ctrl_status_undef = 0;
5187                 } else {
5188                         status = TP_EC_FAN_AUTO;
5189                 }
5190         }
5191
5192         if ((status &
5193              (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0)
5194                 status = fan_control_desired_level;
5195
5196         if (status > 7)
5197                 status = 7;
5198
5199         return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7);
5200 }
5201
5202 static ssize_t fan_pwm1_store(struct device *dev,
5203                               struct device_attribute *attr,
5204                               const char *buf, size_t count)
5205 {
5206         unsigned long s;
5207         int rc;
5208         u8 status, newlevel;
5209
5210         if (parse_strtoul(buf, 255, &s))
5211                 return -EINVAL;
5212
5213         /* scale down from 0-255 to 0-7 */
5214         newlevel = (s >> 5) & 0x07;
5215
5216         if (mutex_lock_interruptible(&fan_mutex))
5217                 return -ERESTARTSYS;
5218
5219         rc = fan_get_status(&status);
5220         if (!rc && (status &
5221                     (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) {
5222                 rc = fan_set_level(newlevel);
5223                 if (rc == -ENXIO)
5224                         rc = -EINVAL;
5225                 else if (!rc) {
5226                         fan_update_desired_level(newlevel);
5227                         fan_watchdog_reset();
5228                 }
5229         }
5230
5231         mutex_unlock(&fan_mutex);
5232         return (rc)? rc : count;
5233 }
5234
5235 static struct device_attribute dev_attr_fan_pwm1 =
5236         __ATTR(pwm1, S_IWUSR | S_IRUGO,
5237                 fan_pwm1_show, fan_pwm1_store);
5238
5239 /* sysfs fan fan1_input ------------------------------------------------ */
5240 static ssize_t fan_fan1_input_show(struct device *dev,
5241                            struct device_attribute *attr,
5242                            char *buf)
5243 {
5244         int res;
5245         unsigned int speed;
5246
5247         res = fan_get_speed(&speed);
5248         if (res < 0)
5249                 return res;
5250
5251         return snprintf(buf, PAGE_SIZE, "%u\n", speed);
5252 }
5253
5254 static struct device_attribute dev_attr_fan_fan1_input =
5255         __ATTR(fan1_input, S_IRUGO,
5256                 fan_fan1_input_show, NULL);
5257
5258 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */
5259 static ssize_t fan_fan_watchdog_show(struct device_driver *drv,
5260                                      char *buf)
5261 {
5262         return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval);
5263 }
5264
5265 static ssize_t fan_fan_watchdog_store(struct device_driver *drv,
5266                                       const char *buf, size_t count)
5267 {
5268         unsigned long t;
5269
5270         if (parse_strtoul(buf, 120, &t))
5271                 return -EINVAL;
5272
5273         if (!fan_control_allowed)
5274                 return -EPERM;
5275
5276         fan_watchdog_maxinterval = t;
5277         fan_watchdog_reset();
5278
5279         return count;
5280 }
5281
5282 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO,
5283                 fan_fan_watchdog_show, fan_fan_watchdog_store);
5284
5285 /* --------------------------------------------------------------------- */
5286 static struct attribute *fan_attributes[] = {
5287         &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr,
5288         &dev_attr_fan_fan1_input.attr,
5289         NULL
5290 };
5291
5292 static const struct attribute_group fan_attr_group = {
5293         .attrs = fan_attributes,
5294 };
5295
5296 static int __init fan_init(struct ibm_init_struct *iibm)
5297 {
5298         int rc;
5299
5300         vdbg_printk(TPACPI_DBG_INIT, "initializing fan subdriver\n");
5301
5302         mutex_init(&fan_mutex);
5303         fan_status_access_mode = TPACPI_FAN_NONE;
5304         fan_control_access_mode = TPACPI_FAN_WR_NONE;
5305         fan_control_commands = 0;
5306         fan_watchdog_maxinterval = 0;
5307         tp_features.fan_ctrl_status_undef = 0;
5308         fan_control_desired_level = 7;
5309
5310         TPACPI_ACPIHANDLE_INIT(fans);
5311         TPACPI_ACPIHANDLE_INIT(gfan);
5312         TPACPI_ACPIHANDLE_INIT(sfan);
5313
5314         if (gfan_handle) {
5315                 /* 570, 600e/x, 770e, 770x */
5316                 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN;
5317         } else {
5318                 /* all other ThinkPads: note that even old-style
5319                  * ThinkPad ECs supports the fan control register */
5320                 if (likely(acpi_ec_read(fan_status_offset,
5321                                         &fan_control_initial_status))) {
5322                         fan_status_access_mode = TPACPI_FAN_RD_TPEC;
5323
5324                         /* In some ThinkPads, neither the EC nor the ACPI
5325                          * DSDT initialize the fan status, and it ends up
5326                          * being set to 0x07 when it *could* be either
5327                          * 0x07 or 0x80.
5328                          *
5329                          * Enable for TP-1Y (T43), TP-78 (R51e),
5330                          * TP-76 (R52), TP-70 (T43, R52), which are known
5331                          * to be buggy. */
5332                         if (fan_control_initial_status == 0x07) {
5333                                 switch (thinkpad_id.ec_model) {
5334                                 case 0x5931: /* TP-1Y */
5335                                 case 0x3837: /* TP-78 */
5336                                 case 0x3637: /* TP-76 */
5337                                 case 0x3037: /* TP-70 */
5338                                         printk(TPACPI_NOTICE
5339                                                "fan_init: initial fan status "
5340                                                "is unknown, assuming it is "
5341                                                "in auto mode\n");
5342                                         tp_features.fan_ctrl_status_undef = 1;
5343                                         ;;
5344                                 }
5345                         }
5346                 } else {
5347                         printk(TPACPI_ERR
5348                                "ThinkPad ACPI EC access misbehaving, "
5349                                "fan status and control unavailable\n");
5350                         return 1;
5351                 }
5352         }
5353
5354         if (sfan_handle) {
5355                 /* 570, 770x-JL */
5356                 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN;
5357                 fan_control_commands |=
5358                     TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE;
5359         } else {
5360                 if (!gfan_handle) {
5361                         /* gfan without sfan means no fan control */
5362                         /* all other models implement TP EC 0x2f control */
5363
5364                         if (fans_handle) {
5365                                 /* X31, X40, X41 */
5366                                 fan_control_access_mode =
5367                                     TPACPI_FAN_WR_ACPI_FANS;
5368                                 fan_control_commands |=
5369                                     TPACPI_FAN_CMD_SPEED |
5370                                     TPACPI_FAN_CMD_LEVEL |
5371                                     TPACPI_FAN_CMD_ENABLE;
5372                         } else {
5373                                 fan_control_access_mode = TPACPI_FAN_WR_TPEC;
5374                                 fan_control_commands |=
5375                                     TPACPI_FAN_CMD_LEVEL |
5376                                     TPACPI_FAN_CMD_ENABLE;
5377                         }
5378                 }
5379         }
5380
5381         vdbg_printk(TPACPI_DBG_INIT, "fan is %s, modes %d, %d\n",
5382                 str_supported(fan_status_access_mode != TPACPI_FAN_NONE ||
5383                   fan_control_access_mode != TPACPI_FAN_WR_NONE),
5384                 fan_status_access_mode, fan_control_access_mode);
5385
5386         /* fan control master switch */
5387         if (!fan_control_allowed) {
5388                 fan_control_access_mode = TPACPI_FAN_WR_NONE;
5389                 fan_control_commands = 0;
5390                 dbg_printk(TPACPI_DBG_INIT,
5391                            "fan control features disabled by parameter\n");
5392         }
5393
5394         /* update fan_control_desired_level */
5395         if (fan_status_access_mode != TPACPI_FAN_NONE)
5396                 fan_get_status_safe(NULL);
5397
5398         if (fan_status_access_mode != TPACPI_FAN_NONE ||
5399             fan_control_access_mode != TPACPI_FAN_WR_NONE) {
5400                 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj,
5401                                          &fan_attr_group);
5402                 if (!(rc < 0))
5403                         rc = driver_create_file(&tpacpi_hwmon_pdriver.driver,
5404                                         &driver_attr_fan_watchdog);
5405                 if (rc < 0)
5406                         return rc;
5407                 return 0;
5408         } else
5409                 return 1;
5410 }
5411
5412 static void fan_exit(void)
5413 {
5414         vdbg_printk(TPACPI_DBG_EXIT,
5415                     "cancelling any pending fan watchdog tasks\n");
5416
5417         /* FIXME: can we really do this unconditionally? */
5418         sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group);
5419         driver_remove_file(&tpacpi_hwmon_pdriver.driver,
5420                            &driver_attr_fan_watchdog);
5421
5422         cancel_delayed_work(&fan_watchdog_task);
5423         flush_scheduled_work();
5424 }
5425
5426 static int fan_read(char *p)
5427 {
5428         int len = 0;
5429         int rc;
5430         u8 status;
5431         unsigned int speed = 0;
5432
5433         switch (fan_status_access_mode) {
5434         case TPACPI_FAN_RD_ACPI_GFAN:
5435                 /* 570, 600e/x, 770e, 770x */
5436                 rc = fan_get_status_safe(&status);
5437                 if (rc < 0)
5438                         return rc;
5439
5440                 len += sprintf(p + len, "status:\t\t%s\n"
5441                                "level:\t\t%d\n",
5442                                (status != 0) ? "enabled" : "disabled", status);
5443                 break;
5444
5445         case TPACPI_FAN_RD_TPEC:
5446                 /* all except 570, 600e/x, 770e, 770x */
5447                 rc = fan_get_status_safe(&status);
5448                 if (rc < 0)
5449                         return rc;
5450
5451                 if (unlikely(tp_features.fan_ctrl_status_undef)) {
5452                         if (status != fan_control_initial_status)
5453                                 tp_features.fan_ctrl_status_undef = 0;
5454                         else
5455                                 /* Return most likely status. In fact, it
5456                                  * might be the only possible status */
5457                                 status = TP_EC_FAN_AUTO;
5458                 }
5459
5460                 len += sprintf(p + len, "status:\t\t%s\n",
5461                                (status != 0) ? "enabled" : "disabled");
5462
5463                 rc = fan_get_speed(&speed);
5464                 if (rc < 0)
5465                         return rc;
5466
5467                 len += sprintf(p + len, "speed:\t\t%d\n", speed);
5468
5469                 if (status & TP_EC_FAN_FULLSPEED)
5470                         /* Disengaged mode takes precedence */
5471                         len += sprintf(p + len, "level:\t\tdisengaged\n");
5472                 else if (status & TP_EC_FAN_AUTO)
5473                         len += sprintf(p + len, "level:\t\tauto\n");
5474                 else
5475                         len += sprintf(p + len, "level:\t\t%d\n", status);
5476                 break;
5477
5478         case TPACPI_FAN_NONE:
5479         default:
5480                 len += sprintf(p + len, "status:\t\tnot supported\n");
5481         }
5482
5483         if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) {
5484                 len += sprintf(p + len, "commands:\tlevel <level>");
5485
5486                 switch (fan_control_access_mode) {
5487                 case TPACPI_FAN_WR_ACPI_SFAN:
5488                         len += sprintf(p + len, " (<level> is 0-7)\n");
5489                         break;
5490
5491                 default:
5492                         len += sprintf(p + len, " (<level> is 0-7, "
5493                                        "auto, disengaged, full-speed)\n");
5494                         break;
5495                 }
5496         }
5497
5498         if (fan_control_commands & TPACPI_FAN_CMD_ENABLE)
5499                 len += sprintf(p + len, "commands:\tenable, disable\n"
5500                                "commands:\twatchdog <timeout> (<timeout> "
5501                                "is 0 (off), 1-120 (seconds))\n");
5502
5503         if (fan_control_commands & TPACPI_FAN_CMD_SPEED)
5504                 len += sprintf(p + len, "commands:\tspeed <speed>"
5505                                " (<speed> is 0-65535)\n");
5506
5507         return len;
5508 }
5509
5510 static int fan_write_cmd_level(const char *cmd, int *rc)
5511 {
5512         int level;
5513
5514         if (strlencmp(cmd, "level auto") == 0)
5515                 level = TP_EC_FAN_AUTO;
5516         else if ((strlencmp(cmd, "level disengaged") == 0) |
5517                         (strlencmp(cmd, "level full-speed") == 0))
5518                 level = TP_EC_FAN_FULLSPEED;
5519         else if (sscanf(cmd, "level %d", &level) != 1)
5520                 return 0;
5521
5522         *rc = fan_set_level_safe(level);
5523         if (*rc == -ENXIO)
5524                 printk(TPACPI_ERR "level command accepted for unsupported "
5525                        "access mode %d", fan_control_access_mode);
5526
5527         return 1;
5528 }
5529
5530 static int fan_write_cmd_enable(const char *cmd, int *rc)
5531 {
5532         if (strlencmp(cmd, "enable") != 0)
5533                 return 0;
5534
5535         *rc = fan_set_enable();
5536         if (*rc == -ENXIO)
5537                 printk(TPACPI_ERR "enable command accepted for unsupported "
5538                        "access mode %d", fan_control_access_mode);
5539
5540         return 1;
5541 }
5542
5543 static int fan_write_cmd_disable(const char *cmd, int *rc)
5544 {
5545         if (strlencmp(cmd, "disable") != 0)
5546                 return 0;
5547
5548         *rc = fan_set_disable();
5549         if (*rc == -ENXIO)
5550                 printk(TPACPI_ERR "disable command accepted for unsupported "
5551                        "access mode %d", fan_control_access_mode);
5552
5553         return 1;
5554 }
5555
5556 static int fan_write_cmd_speed(const char *cmd, int *rc)
5557 {
5558         int speed;
5559
5560         /* TODO:
5561          * Support speed <low> <medium> <high> ? */
5562
5563         if (sscanf(cmd, "speed %d", &speed) != 1)
5564                 return 0;
5565
5566         *rc = fan_set_speed(speed);
5567         if (*rc == -ENXIO)
5568                 printk(TPACPI_ERR "speed command accepted for unsupported "
5569                        "access mode %d", fan_control_access_mode);
5570
5571         return 1;
5572 }
5573
5574 static int fan_write_cmd_watchdog(const char *cmd, int *rc)
5575 {
5576         int interval;
5577
5578         if (sscanf(cmd, "watchdog %d", &interval) != 1)
5579                 return 0;
5580
5581         if (interval < 0 || interval > 120)
5582                 *rc = -EINVAL;
5583         else
5584                 fan_watchdog_maxinterval = interval;
5585
5586         return 1;
5587 }
5588
5589 static int fan_write(char *buf)
5590 {
5591         char *cmd;
5592         int rc = 0;
5593
5594         while (!rc && (cmd = next_cmd(&buf))) {
5595                 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) &&
5596                       fan_write_cmd_level(cmd, &rc)) &&
5597                     !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) &&
5598                       (fan_write_cmd_enable(cmd, &rc) ||
5599                        fan_write_cmd_disable(cmd, &rc) ||
5600                        fan_write_cmd_watchdog(cmd, &rc))) &&
5601                     !((fan_control_commands & TPACPI_FAN_CMD_SPEED) &&
5602                       fan_write_cmd_speed(cmd, &rc))
5603                     )
5604                         rc = -EINVAL;
5605                 else if (!rc)
5606                         fan_watchdog_reset();
5607         }
5608
5609         return rc;
5610 }
5611
5612 static struct ibm_struct fan_driver_data = {
5613         .name = "fan",
5614         .read = fan_read,
5615         .write = fan_write,
5616         .exit = fan_exit,
5617 };
5618
5619 /****************************************************************************
5620  ****************************************************************************
5621  *
5622  * Infrastructure
5623  *
5624  ****************************************************************************
5625  ****************************************************************************/
5626
5627 /* sysfs name ---------------------------------------------------------- */
5628 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev,
5629                            struct device_attribute *attr,
5630                            char *buf)
5631 {
5632         return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME);
5633 }
5634
5635 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name =
5636         __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL);
5637
5638 /* --------------------------------------------------------------------- */
5639
5640 /* /proc support */
5641 static struct proc_dir_entry *proc_dir;
5642
5643 /*
5644  * Module and infrastructure proble, init and exit handling
5645  */
5646
5647 static int force_load;
5648
5649 #ifdef CONFIG_THINKPAD_ACPI_DEBUG
5650 static const char * __init str_supported(int is_supported)
5651 {
5652         static char text_unsupported[] __initdata = "not supported";
5653
5654         return (is_supported)? &text_unsupported[4] : &text_unsupported[0];
5655 }
5656 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */
5657
5658 static void ibm_exit(struct ibm_struct *ibm)
5659 {
5660         dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name);
5661
5662         list_del_init(&ibm->all_drivers);
5663
5664         if (ibm->flags.acpi_notify_installed) {
5665                 dbg_printk(TPACPI_DBG_EXIT,
5666                         "%s: acpi_remove_notify_handler\n", ibm->name);
5667                 BUG_ON(!ibm->acpi);
5668                 acpi_remove_notify_handler(*ibm->acpi->handle,
5669                                            ibm->acpi->type,
5670                                            dispatch_acpi_notify);
5671                 ibm->flags.acpi_notify_installed = 0;
5672                 ibm->flags.acpi_notify_installed = 0;
5673         }
5674
5675         if (ibm->flags.proc_created) {
5676                 dbg_printk(TPACPI_DBG_EXIT,
5677                         "%s: remove_proc_entry\n", ibm->name);
5678                 remove_proc_entry(ibm->name, proc_dir);
5679                 ibm->flags.proc_created = 0;
5680         }
5681
5682         if (ibm->flags.acpi_driver_registered) {
5683                 dbg_printk(TPACPI_DBG_EXIT,
5684                         "%s: acpi_bus_unregister_driver\n", ibm->name);
5685                 BUG_ON(!ibm->acpi);
5686                 acpi_bus_unregister_driver(ibm->acpi->driver);
5687                 kfree(ibm->acpi->driver);
5688                 ibm->acpi->driver = NULL;
5689                 ibm->flags.acpi_driver_registered = 0;
5690         }
5691
5692         if (ibm->flags.init_called && ibm->exit) {
5693                 ibm->exit();
5694                 ibm->flags.init_called = 0;
5695         }
5696
5697         dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name);
5698 }
5699
5700 static int __init ibm_init(struct ibm_init_struct *iibm)
5701 {
5702         int ret;
5703         struct ibm_struct *ibm = iibm->data;
5704         struct proc_dir_entry *entry;
5705
5706         BUG_ON(ibm == NULL);
5707
5708         INIT_LIST_HEAD(&ibm->all_drivers);
5709
5710         if (ibm->flags.experimental && !experimental)
5711                 return 0;
5712
5713         dbg_printk(TPACPI_DBG_INIT,
5714                 "probing for %s\n", ibm->name);
5715
5716         if (iibm->init) {
5717                 ret = iibm->init(iibm);
5718                 if (ret > 0)
5719                         return 0;       /* probe failed */
5720                 if (ret)
5721                         return ret;
5722
5723                 ibm->flags.init_called = 1;
5724         }
5725
5726         if (ibm->acpi) {
5727                 if (ibm->acpi->hid) {
5728                         ret = register_tpacpi_subdriver(ibm);
5729                         if (ret)
5730                                 goto err_out;
5731                 }
5732
5733                 if (ibm->acpi->notify) {
5734                         ret = setup_acpi_notify(ibm);
5735                         if (ret == -ENODEV) {
5736                                 printk(TPACPI_NOTICE "disabling subdriver %s\n",
5737                                         ibm->name);
5738                                 ret = 0;
5739                                 goto err_out;
5740                         }
5741                         if (ret < 0)
5742                                 goto err_out;
5743                 }
5744         }
5745
5746         dbg_printk(TPACPI_DBG_INIT,
5747                 "%s installed\n", ibm->name);
5748
5749         if (ibm->read) {
5750                 entry = create_proc_entry(ibm->name,
5751                                           S_IFREG | S_IRUGO | S_IWUSR,
5752                                           proc_dir);
5753                 if (!entry) {
5754                         printk(TPACPI_ERR "unable to create proc entry %s\n",
5755                                ibm->name);
5756                         ret = -ENODEV;
5757                         goto err_out;
5758                 }
5759                 entry->owner = THIS_MODULE;
5760                 entry->data = ibm;
5761                 entry->read_proc = &dispatch_procfs_read;
5762                 if (ibm->write)
5763                         entry->write_proc = &dispatch_procfs_write;
5764                 ibm->flags.proc_created = 1;
5765         }
5766
5767         list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers);
5768
5769         return 0;
5770
5771 err_out:
5772         dbg_printk(TPACPI_DBG_INIT,
5773                 "%s: at error exit path with result %d\n",
5774                 ibm->name, ret);
5775
5776         ibm_exit(ibm);
5777         return (ret < 0)? ret : 0;
5778 }
5779
5780 /* Probing */
5781
5782 static void __init get_thinkpad_model_data(struct thinkpad_id_data *tp)
5783 {
5784         const struct dmi_device *dev = NULL;
5785         char ec_fw_string[18];
5786
5787         if (!tp)
5788                 return;
5789
5790         memset(tp, 0, sizeof(*tp));
5791
5792         if (dmi_name_in_vendors("IBM"))
5793                 tp->vendor = PCI_VENDOR_ID_IBM;
5794         else if (dmi_name_in_vendors("LENOVO"))
5795                 tp->vendor = PCI_VENDOR_ID_LENOVO;
5796         else
5797                 return;
5798
5799         tp->bios_version_str = kstrdup(dmi_get_system_info(DMI_BIOS_VERSION),
5800                                         GFP_KERNEL);
5801         if (!tp->bios_version_str)
5802                 return;
5803         tp->bios_model = tp->bios_version_str[0]
5804                          | (tp->bios_version_str[1] << 8);
5805
5806         /*
5807          * ThinkPad T23 or newer, A31 or newer, R50e or newer,
5808          * X32 or newer, all Z series;  Some models must have an
5809          * up-to-date BIOS or they will not be detected.
5810          *
5811          * See http://thinkwiki.org/wiki/List_of_DMI_IDs
5812          */
5813         while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) {
5814                 if (sscanf(dev->name,
5815                            "IBM ThinkPad Embedded Controller -[%17c",
5816                            ec_fw_string) == 1) {
5817                         ec_fw_string[sizeof(ec_fw_string) - 1] = 0;
5818                         ec_fw_string[strcspn(ec_fw_string, " ]")] = 0;
5819
5820                         tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL);
5821                         tp->ec_model = ec_fw_string[0]
5822                                         | (ec_fw_string[1] << 8);
5823                         break;
5824                 }
5825         }
5826
5827         tp->model_str = kstrdup(dmi_get_system_info(DMI_PRODUCT_VERSION),
5828                                         GFP_KERNEL);
5829         if (strnicmp(tp->model_str, "ThinkPad", 8) != 0) {
5830                 kfree(tp->model_str);
5831                 tp->model_str = NULL;
5832         }
5833 }
5834
5835 static int __init probe_for_thinkpad(void)
5836 {
5837         int is_thinkpad;
5838
5839         if (acpi_disabled)
5840                 return -ENODEV;
5841
5842         /*
5843          * Non-ancient models have better DMI tagging, but very old models
5844          * don't.
5845          */
5846         is_thinkpad = (thinkpad_id.model_str != NULL);
5847
5848         /* ec is required because many other handles are relative to it */
5849         TPACPI_ACPIHANDLE_INIT(ec);
5850         if (!ec_handle) {
5851                 if (is_thinkpad)
5852                         printk(TPACPI_ERR
5853                                 "Not yet supported ThinkPad detected!\n");
5854                 return -ENODEV;
5855         }
5856
5857         /*
5858          * Risks a regression on very old machines, but reduces potential
5859          * false positives a damn great deal
5860          */
5861         if (!is_thinkpad)
5862                 is_thinkpad = (thinkpad_id.vendor == PCI_VENDOR_ID_IBM);
5863
5864         if (!is_thinkpad && !force_load)
5865                 return -ENODEV;
5866
5867         return 0;
5868 }
5869
5870
5871 /* Module init, exit, parameters */
5872
5873 static struct ibm_init_struct ibms_init[] __initdata = {
5874         {
5875                 .init = thinkpad_acpi_driver_init,
5876                 .data = &thinkpad_acpi_driver_data,
5877         },
5878         {
5879                 .init = hotkey_init,
5880                 .data = &hotkey_driver_data,
5881         },
5882         {
5883                 .init = bluetooth_init,
5884                 .data = &bluetooth_driver_data,
5885         },
5886         {
5887                 .init = wan_init,
5888                 .data = &wan_driver_data,
5889         },
5890 #ifdef CONFIG_THINKPAD_ACPI_VIDEO
5891         {
5892                 .init = video_init,
5893                 .data = &video_driver_data,
5894         },
5895 #endif
5896         {
5897                 .init = light_init,
5898                 .data = &light_driver_data,
5899         },
5900 #ifdef CONFIG_THINKPAD_ACPI_DOCK
5901         {
5902                 .init = dock_init,
5903                 .data = &dock_driver_data[0],
5904         },
5905         {
5906                 .init = dock_init2,
5907                 .data = &dock_driver_data[1],
5908         },
5909 #endif
5910 #ifdef CONFIG_THINKPAD_ACPI_BAY
5911         {
5912                 .init = bay_init,
5913                 .data = &bay_driver_data,
5914         },
5915 #endif
5916         {
5917                 .init = cmos_init,
5918                 .data = &cmos_driver_data,
5919         },
5920         {
5921                 .init = led_init,
5922                 .data = &led_driver_data,
5923         },
5924         {
5925                 .init = beep_init,
5926                 .data = &beep_driver_data,
5927         },
5928         {
5929                 .init = thermal_init,
5930                 .data = &thermal_driver_data,
5931         },
5932         {
5933                 .data = &ecdump_driver_data,
5934         },
5935         {
5936                 .init = brightness_init,
5937                 .data = &brightness_driver_data,
5938         },
5939         {
5940                 .data = &volume_driver_data,
5941         },
5942         {
5943                 .init = fan_init,
5944                 .data = &fan_driver_data,
5945         },
5946 };
5947
5948 static int __init set_ibm_param(const char *val, struct kernel_param *kp)
5949 {
5950         unsigned int i;
5951         struct ibm_struct *ibm;
5952
5953         if (!kp || !kp->name || !val)
5954                 return -EINVAL;
5955
5956         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
5957                 ibm = ibms_init[i].data;
5958                 WARN_ON(ibm == NULL);
5959
5960                 if (!ibm || !ibm->name)
5961                         continue;
5962
5963                 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) {
5964                         if (strlen(val) > sizeof(ibms_init[i].param) - 2)
5965                                 return -ENOSPC;
5966                         strcpy(ibms_init[i].param, val);
5967                         strcat(ibms_init[i].param, ",");
5968                         return 0;
5969                 }
5970         }
5971
5972         return -EINVAL;
5973 }
5974
5975 module_param(experimental, int, 0);
5976 MODULE_PARM_DESC(experimental,
5977                  "Enables experimental features when non-zero");
5978
5979 module_param_named(debug, dbg_level, uint, 0);
5980 MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
5981
5982 module_param(force_load, bool, 0);
5983 MODULE_PARM_DESC(force_load,
5984                  "Attempts to load the driver even on a "
5985                  "mis-identified ThinkPad when true");
5986
5987 module_param_named(fan_control, fan_control_allowed, bool, 0);
5988 MODULE_PARM_DESC(fan_control,
5989                  "Enables setting fan parameters features when true");
5990
5991 module_param_named(brightness_mode, brightness_mode, int, 0);
5992 MODULE_PARM_DESC(brightness_mode,
5993                  "Selects brightness control strategy: "
5994                  "0=auto, 1=EC, 2=CMOS, 3=both");
5995
5996 module_param(brightness_enable, uint, 0);
5997 MODULE_PARM_DESC(brightness_enable,
5998                  "Enables backlight control when 1, disables when 0");
5999
6000 module_param(hotkey_report_mode, uint, 0);
6001 MODULE_PARM_DESC(hotkey_report_mode,
6002                  "used for backwards compatibility with userspace, "
6003                  "see documentation");
6004
6005 #define TPACPI_PARAM(feature) \
6006         module_param_call(feature, set_ibm_param, NULL, NULL, 0); \
6007         MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \
6008                          "at module load, see documentation")
6009
6010 TPACPI_PARAM(hotkey);
6011 TPACPI_PARAM(bluetooth);
6012 TPACPI_PARAM(video);
6013 TPACPI_PARAM(light);
6014 #ifdef CONFIG_THINKPAD_ACPI_DOCK
6015 TPACPI_PARAM(dock);
6016 #endif
6017 #ifdef CONFIG_THINKPAD_ACPI_BAY
6018 TPACPI_PARAM(bay);
6019 #endif /* CONFIG_THINKPAD_ACPI_BAY */
6020 TPACPI_PARAM(cmos);
6021 TPACPI_PARAM(led);
6022 TPACPI_PARAM(beep);
6023 TPACPI_PARAM(ecdump);
6024 TPACPI_PARAM(brightness);
6025 TPACPI_PARAM(volume);
6026 TPACPI_PARAM(fan);
6027
6028 static void thinkpad_acpi_module_exit(void)
6029 {
6030         struct ibm_struct *ibm, *itmp;
6031
6032         tpacpi_lifecycle = TPACPI_LIFE_EXITING;
6033
6034         list_for_each_entry_safe_reverse(ibm, itmp,
6035                                          &tpacpi_all_drivers,
6036                                          all_drivers) {
6037                 ibm_exit(ibm);
6038         }
6039
6040         dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n");
6041
6042         if (tpacpi_inputdev) {
6043                 if (tp_features.input_device_registered)
6044                         input_unregister_device(tpacpi_inputdev);
6045                 else
6046                         input_free_device(tpacpi_inputdev);
6047         }
6048
6049         if (tpacpi_hwmon)
6050                 hwmon_device_unregister(tpacpi_hwmon);
6051
6052         if (tp_features.sensors_pdev_attrs_registered)
6053                 device_remove_file(&tpacpi_sensors_pdev->dev,
6054                                    &dev_attr_thinkpad_acpi_pdev_name);
6055         if (tpacpi_sensors_pdev)
6056                 platform_device_unregister(tpacpi_sensors_pdev);
6057         if (tpacpi_pdev)
6058                 platform_device_unregister(tpacpi_pdev);
6059
6060         if (tp_features.sensors_pdrv_attrs_registered)
6061                 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver);
6062         if (tp_features.platform_drv_attrs_registered)
6063                 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver);
6064
6065         if (tp_features.sensors_pdrv_registered)
6066                 platform_driver_unregister(&tpacpi_hwmon_pdriver);
6067
6068         if (tp_features.platform_drv_registered)
6069                 platform_driver_unregister(&tpacpi_pdriver);
6070
6071         if (proc_dir)
6072                 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir);
6073
6074         kfree(thinkpad_id.bios_version_str);
6075         kfree(thinkpad_id.ec_version_str);
6076         kfree(thinkpad_id.model_str);
6077 }
6078
6079
6080 static int __init thinkpad_acpi_module_init(void)
6081 {
6082         int ret, i;
6083
6084         tpacpi_lifecycle = TPACPI_LIFE_INIT;
6085
6086         /* Parameter checking */
6087         if (hotkey_report_mode > 2)
6088                 return -EINVAL;
6089
6090         /* Driver-level probe */
6091
6092         get_thinkpad_model_data(&thinkpad_id);
6093         ret = probe_for_thinkpad();
6094         if (ret) {
6095                 thinkpad_acpi_module_exit();
6096                 return ret;
6097         }
6098
6099         /* Driver initialization */
6100
6101         TPACPI_ACPIHANDLE_INIT(ecrd);
6102         TPACPI_ACPIHANDLE_INIT(ecwr);
6103
6104         proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir);
6105         if (!proc_dir) {
6106                 printk(TPACPI_ERR
6107                        "unable to create proc dir " TPACPI_PROC_DIR);
6108                 thinkpad_acpi_module_exit();
6109                 return -ENODEV;
6110         }
6111         proc_dir->owner = THIS_MODULE;
6112
6113         ret = platform_driver_register(&tpacpi_pdriver);
6114         if (ret) {
6115                 printk(TPACPI_ERR
6116                        "unable to register main platform driver\n");
6117                 thinkpad_acpi_module_exit();
6118                 return ret;
6119         }
6120         tp_features.platform_drv_registered = 1;
6121
6122         ret = platform_driver_register(&tpacpi_hwmon_pdriver);
6123         if (ret) {
6124                 printk(TPACPI_ERR
6125                        "unable to register hwmon platform driver\n");
6126                 thinkpad_acpi_module_exit();
6127                 return ret;
6128         }
6129         tp_features.sensors_pdrv_registered = 1;
6130
6131         ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver);
6132         if (!ret) {
6133                 tp_features.platform_drv_attrs_registered = 1;
6134                 ret = tpacpi_create_driver_attributes(
6135                                         &tpacpi_hwmon_pdriver.driver);
6136         }
6137         if (ret) {
6138                 printk(TPACPI_ERR
6139                        "unable to create sysfs driver attributes\n");
6140                 thinkpad_acpi_module_exit();
6141                 return ret;
6142         }
6143         tp_features.sensors_pdrv_attrs_registered = 1;
6144
6145
6146         /* Device initialization */
6147         tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1,
6148                                                         NULL, 0);
6149         if (IS_ERR(tpacpi_pdev)) {
6150                 ret = PTR_ERR(tpacpi_pdev);
6151                 tpacpi_pdev = NULL;
6152                 printk(TPACPI_ERR "unable to register platform device\n");
6153                 thinkpad_acpi_module_exit();
6154                 return ret;
6155         }
6156         tpacpi_sensors_pdev = platform_device_register_simple(
6157                                                 TPACPI_HWMON_DRVR_NAME,
6158                                                 -1, NULL, 0);
6159         if (IS_ERR(tpacpi_sensors_pdev)) {
6160                 ret = PTR_ERR(tpacpi_sensors_pdev);
6161                 tpacpi_sensors_pdev = NULL;
6162                 printk(TPACPI_ERR
6163                        "unable to register hwmon platform device\n");
6164                 thinkpad_acpi_module_exit();
6165                 return ret;
6166         }
6167         ret = device_create_file(&tpacpi_sensors_pdev->dev,
6168                                  &dev_attr_thinkpad_acpi_pdev_name);
6169         if (ret) {
6170                 printk(TPACPI_ERR
6171                        "unable to create sysfs hwmon device attributes\n");
6172                 thinkpad_acpi_module_exit();
6173                 return ret;
6174         }
6175         tp_features.sensors_pdev_attrs_registered = 1;
6176         tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev);
6177         if (IS_ERR(tpacpi_hwmon)) {
6178                 ret = PTR_ERR(tpacpi_hwmon);
6179                 tpacpi_hwmon = NULL;
6180                 printk(TPACPI_ERR "unable to register hwmon device\n");
6181                 thinkpad_acpi_module_exit();
6182                 return ret;
6183         }
6184         mutex_init(&tpacpi_inputdev_send_mutex);
6185         tpacpi_inputdev = input_allocate_device();
6186         if (!tpacpi_inputdev) {
6187                 printk(TPACPI_ERR "unable to allocate input device\n");
6188                 thinkpad_acpi_module_exit();
6189                 return -ENOMEM;
6190         } else {
6191                 /* Prepare input device, but don't register */
6192                 tpacpi_inputdev->name = "ThinkPad Extra Buttons";
6193                 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0";
6194                 tpacpi_inputdev->id.bustype = BUS_HOST;
6195                 tpacpi_inputdev->id.vendor = (thinkpad_id.vendor) ?
6196                                                 thinkpad_id.vendor :
6197                                                 PCI_VENDOR_ID_IBM;
6198                 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT;
6199                 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION;
6200         }
6201         for (i = 0; i < ARRAY_SIZE(ibms_init); i++) {
6202                 ret = ibm_init(&ibms_init[i]);
6203                 if (ret >= 0 && *ibms_init[i].param)
6204                         ret = ibms_init[i].data->write(ibms_init[i].param);
6205                 if (ret < 0) {
6206                         thinkpad_acpi_module_exit();
6207                         return ret;
6208                 }
6209         }
6210         ret = input_register_device(tpacpi_inputdev);
6211         if (ret < 0) {
6212                 printk(TPACPI_ERR "unable to register input device\n");
6213                 thinkpad_acpi_module_exit();
6214                 return ret;
6215         } else {
6216                 tp_features.input_device_registered = 1;
6217         }
6218
6219         tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
6220         return 0;
6221 }
6222
6223 /* Please remove this in year 2009 */
6224 MODULE_ALIAS("ibm_acpi");
6225
6226 /*
6227  * DMI matching for module autoloading
6228  *
6229  * See http://thinkwiki.org/wiki/List_of_DMI_IDs
6230  * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads
6231  *
6232  * Only models listed in thinkwiki will be supported, so add yours
6233  * if it is not there yet.
6234  */
6235 #define IBM_BIOS_MODULE_ALIAS(__type) \
6236         MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW")
6237
6238 /* Non-ancient thinkpads */
6239 MODULE_ALIAS("dmi:bvnIBM:*:svnIBM:*:pvrThinkPad*:rvnIBM:*");
6240 MODULE_ALIAS("dmi:bvnLENOVO:*:svnLENOVO:*:pvrThinkPad*:rvnLENOVO:*");
6241
6242 /* Ancient thinkpad BIOSes have to be identified by
6243  * BIOS type or model number, and there are far less
6244  * BIOS types than model numbers... */
6245 IBM_BIOS_MODULE_ALIAS("I[B,D,H,I,M,N,O,T,W,V,Y,Z]");
6246 IBM_BIOS_MODULE_ALIAS("1[0,3,6,8,A-G,I,K,M-P,S,T]");
6247 IBM_BIOS_MODULE_ALIAS("K[U,X-Z]");
6248
6249 MODULE_AUTHOR("Borislav Deianov, Henrique de Moraes Holschuh");
6250 MODULE_DESCRIPTION(TPACPI_DESC);
6251 MODULE_VERSION(TPACPI_VERSION);
6252 MODULE_LICENSE("GPL");
6253
6254 module_init(thinkpad_acpi_module_init);
6255 module_exit(thinkpad_acpi_module_exit);