drivers/platform/x86/toshiba_acpi.c

   1 /*
   2  *  toshiba_acpi.c - Toshiba Laptop ACPI Extras
   3  *
   4  *
   5  *  Copyright (C) 2002-2004 John Belmonte
   6  *  Copyright (C) 2008 Philip Langdale
   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  *
  23  *  The devolpment page for this driver is located at
  24  *  http://memebeam.org/toys/ToshibaAcpiDriver.
  25  *
  26  *  Credits:
  27  *      Jonathan A. Buzzard - Toshiba HCI info, and critical tips on reverse
  28  *              engineering the Windows drivers
  29  *      Yasushi Nagato - changes for linux kernel 2.4 -> 2.5
  30  *      Rob Miller - TV out and hotkeys help
  31  *
  32  *
  33  *  TODO
  34  *
  35  */
  36
  37 #define TOSHIBA_ACPI_VERSION    "0.19"
  38 #define PROC_INTERFACE_VERSION  1
  39
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/init.h>
  43 #include <linux/types.h>
  44 #include <linux/proc_fs.h>
  45 #include <linux/seq_file.h>
  46 #include <linux/backlight.h>
  47 #include <linux/platform_device.h>
  48 #include <linux/rfkill.h>
  49
  50 #include <asm/uaccess.h>
  51
  52 #include <acpi/acpi_drivers.h>
  53
  54 MODULE_AUTHOR("John Belmonte");
  55 MODULE_DESCRIPTION("Toshiba Laptop ACPI Extras Driver");
  56 MODULE_LICENSE("GPL");
  57
  58 #define MY_LOGPREFIX "toshiba_acpi: "
  59 #define MY_ERR KERN_ERR MY_LOGPREFIX
  60 #define MY_NOTICE KERN_NOTICE MY_LOGPREFIX
  61 #define MY_INFO KERN_INFO MY_LOGPREFIX
  62
  63 /* Toshiba ACPI method paths */
  64 #define METHOD_LCD_BRIGHTNESS   "\\_SB_.PCI0.VGA_.LCD_._BCM"
  65 #define METHOD_HCI_1            "\\_SB_.VALD.GHCI"
  66 #define METHOD_HCI_2            "\\_SB_.VALZ.GHCI"
  67 #define METHOD_VIDEO_OUT        "\\_SB_.VALX.DSSX"
  68
  69 /* Toshiba HCI interface definitions
  70  *
  71  * HCI is Toshiba's "Hardware Control Interface" which is supposed to
  72  * be uniform across all their models.  Ideally we would just call
  73  * dedicated ACPI methods instead of using this primitive interface.
  74  * However the ACPI methods seem to be incomplete in some areas (for
  75  * example they allow setting, but not reading, the LCD brightness value),
  76  * so this is still useful.
  77  */
  78
  79 #define HCI_WORDS                       6
  80
  81 /* operations */
  82 #define HCI_SET                         0xff00
  83 #define HCI_GET                         0xfe00
  84
  85 /* return codes */
  86 #define HCI_SUCCESS                     0x0000
  87 #define HCI_FAILURE                     0x1000
  88 #define HCI_NOT_SUPPORTED               0x8000
  89 #define HCI_EMPTY                       0x8c00
  90
  91 /* registers */
  92 #define HCI_FAN                         0x0004
  93 #define HCI_SYSTEM_EVENT                0x0016
  94 #define HCI_VIDEO_OUT                   0x001c
  95 #define HCI_HOTKEY_EVENT                0x001e
  96 #define HCI_LCD_BRIGHTNESS              0x002a
  97 #define HCI_WIRELESS                    0x0056
  98
  99 /* field definitions */
 100 #define HCI_LCD_BRIGHTNESS_BITS         3
 101 #define HCI_LCD_BRIGHTNESS_SHIFT        (16-HCI_LCD_BRIGHTNESS_BITS)
 102 #define HCI_LCD_BRIGHTNESS_LEVELS       (1 << HCI_LCD_BRIGHTNESS_BITS)
 103 #define HCI_VIDEO_OUT_LCD               0x1
 104 #define HCI_VIDEO_OUT_CRT               0x2
 105 #define HCI_VIDEO_OUT_TV                0x4
 106 #define HCI_WIRELESS_KILL_SWITCH        0x01
 107 #define HCI_WIRELESS_BT_PRESENT         0x0f
 108 #define HCI_WIRELESS_BT_ATTACH          0x40
 109 #define HCI_WIRELESS_BT_POWER           0x80
 110
 111 static const struct acpi_device_id toshiba_device_ids[] = {
 112         {"TOS6200", 0},
 113         {"TOS6208", 0},
 114         {"TOS1900", 0},
 115         {"", 0},
 116 };
 117 MODULE_DEVICE_TABLE(acpi, toshiba_device_ids);
 118
 119 /* utility
 120  */
 121
 122 static __inline__ void _set_bit(u32 * word, u32 mask, int value)
 123 {
 124         *word = (*word & ~mask) | (mask * value);
 125 }
 126
 127 /* acpi interface wrappers
 128  */
 129
 130 static int is_valid_acpi_path(const char *methodName)
 131 {
 132         acpi_handle handle;
 133         acpi_status status;
 134
 135         status = acpi_get_handle(NULL, (char *)methodName, &handle);
 136         return !ACPI_FAILURE(status);
 137 }
 138
 139 static int write_acpi_int(const char *methodName, int val)
 140 {
 141         struct acpi_object_list params;
 142         union acpi_object in_objs[1];
 143         acpi_status status;
 144
 145         params.count = ARRAY_SIZE(in_objs);
 146         params.pointer = in_objs;
 147         in_objs[0].type = ACPI_TYPE_INTEGER;
 148         in_objs[0].integer.value = val;
 149
 150         status = acpi_evaluate_object(NULL, (char *)methodName, &params, NULL);
 151         return (status == AE_OK);
 152 }
 153
 154 #if 0
 155 static int read_acpi_int(const char *methodName, int *pVal)
 156 {
 157         struct acpi_buffer results;
 158         union acpi_object out_objs[1];
 159         acpi_status status;
 160
 161         results.length = sizeof(out_objs);
 162         results.pointer = out_objs;
 163
 164         status = acpi_evaluate_object(0, (char *)methodName, 0, &results);
 165         *pVal = out_objs[0].integer.value;
 166
 167         return (status == AE_OK) && (out_objs[0].type == ACPI_TYPE_INTEGER);
 168 }
 169 #endif
 170
 171 static const char *method_hci /*= 0*/ ;
 172
 173 /* Perform a raw HCI call.  Here we don't care about input or output buffer
 174  * format.
 175  */
 176 static acpi_status hci_raw(const u32 in[HCI_WORDS], u32 out[HCI_WORDS])
 177 {
 178         struct acpi_object_list params;
 179         union acpi_object in_objs[HCI_WORDS];
 180         struct acpi_buffer results;
 181         union acpi_object out_objs[HCI_WORDS + 1];
 182         acpi_status status;
 183         int i;
 184
 185         params.count = HCI_WORDS;
 186         params.pointer = in_objs;
 187         for (i = 0; i < HCI_WORDS; ++i) {
 188                 in_objs[i].type = ACPI_TYPE_INTEGER;
 189                 in_objs[i].integer.value = in[i];
 190         }
 191
 192         results.length = sizeof(out_objs);
 193         results.pointer = out_objs;
 194
 195         status = acpi_evaluate_object(NULL, (char *)method_hci, &params,
 196                                       &results);
 197         if ((status == AE_OK) && (out_objs->package.count <= HCI_WORDS)) {
 198                 for (i = 0; i < out_objs->package.count; ++i) {
 199                         out[i] = out_objs->package.elements[i].integer.value;
 200                 }
 201         }
 202
 203         return status;
 204 }
 205
 206 /* common hci tasks (get or set one or two value)
 207  *
 208  * In addition to the ACPI status, the HCI system returns a result which
 209  * may be useful (such as "not supported").
 210  */
 211
 212 static acpi_status hci_write1(u32 reg, u32 in1, u32 * result)
 213 {
 214         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, 0, 0, 0 };
 215         u32 out[HCI_WORDS];
 216         acpi_status status = hci_raw(in, out);
 217         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 218         return status;
 219 }
 220
 221 static acpi_status hci_read1(u32 reg, u32 * out1, u32 * result)
 222 {
 223         u32 in[HCI_WORDS] = { HCI_GET, reg, 0, 0, 0, 0 };
 224         u32 out[HCI_WORDS];
 225         acpi_status status = hci_raw(in, out);
 226         *out1 = out[2];
 227         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 228         return status;
 229 }
 230
 231 static acpi_status hci_write2(u32 reg, u32 in1, u32 in2, u32 *result)
 232 {
 233         u32 in[HCI_WORDS] = { HCI_SET, reg, in1, in2, 0, 0 };
 234         u32 out[HCI_WORDS];
 235         acpi_status status = hci_raw(in, out);
 236         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 237         return status;
 238 }
 239
 240 static acpi_status hci_read2(u32 reg, u32 *out1, u32 *out2, u32 *result)
 241 {
 242         u32 in[HCI_WORDS] = { HCI_GET, reg, *out1, *out2, 0, 0 };
 243         u32 out[HCI_WORDS];
 244         acpi_status status = hci_raw(in, out);
 245         *out1 = out[2];
 246         *out2 = out[3];
 247         *result = (status == AE_OK) ? out[0] : HCI_FAILURE;
 248         return status;
 249 }
 250
 251 struct toshiba_acpi_dev {
 252         struct platform_device *p_dev;
 253         struct rfkill *bt_rfk;
 254
 255         const char *bt_name;
 256
 257         struct mutex mutex;
 258 };
 259
 260 static struct toshiba_acpi_dev toshiba_acpi = {
 261         .bt_name = "Toshiba Bluetooth",
 262 };
 263
 264 /* Bluetooth rfkill handlers */
 265
 266 static u32 hci_get_bt_present(bool *present)
 267 {
 268         u32 hci_result;
 269         u32 value, value2;
 270
 271         value = 0;
 272         value2 = 0;
 273         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 274         if (hci_result == HCI_SUCCESS)
 275                 *present = (value & HCI_WIRELESS_BT_PRESENT) ? true : false;
 276
 277         return hci_result;
 278 }
 279
 280 static u32 hci_get_radio_state(bool *radio_state)
 281 {
 282         u32 hci_result;
 283         u32 value, value2;
 284
 285         value = 0;
 286         value2 = 0x0001;
 287         hci_read2(HCI_WIRELESS, &value, &value2, &hci_result);
 288
 289         *radio_state = value & HCI_WIRELESS_KILL_SWITCH;
 290         return hci_result;
 291 }
 292
 293 static int bt_rfkill_set_block(void *data, bool blocked)
 294 {
 295         struct toshiba_acpi_dev *dev = data;
 296         u32 result1, result2;
 297         u32 value;
 298         int err;
 299         bool radio_state;
 300
 301         value = (blocked == false);
 302
 303         mutex_lock(&dev->mutex);
 304         if (hci_get_radio_state(&radio_state) != HCI_SUCCESS) {
 305                 err = -EBUSY;
 306                 goto out;
 307         }
 308
 309         if (!radio_state) {
 310                 err = 0;
 311                 goto out;
 312         }
 313
 314         hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_POWER, &result1);
 315         hci_write2(HCI_WIRELESS, value, HCI_WIRELESS_BT_ATTACH, &result2);
 316
 317         if (result1 != HCI_SUCCESS || result2 != HCI_SUCCESS)
 318                 err = -EBUSY;
 319         else
 320                 err = 0;
 321  out:
 322         mutex_unlock(&dev->mutex);
 323         return err;
 324 }
 325
 326 static void bt_rfkill_poll(struct rfkill *rfkill, void *data)
 327 {
 328         bool new_rfk_state;
 329         bool value;
 330         u32 hci_result;
 331         struct toshiba_acpi_dev *dev = data;
 332
 333         mutex_lock(&dev->mutex);
 334
 335         hci_result = hci_get_radio_state(&value);
 336         if (hci_result != HCI_SUCCESS) {
 337                 /* Can't do anything useful */
 338                 mutex_unlock(&dev->mutex);
 339                 return;
 340         }
 341
 342         new_rfk_state = value;
 343
 344         mutex_unlock(&dev->mutex);
 345
 346         if (rfkill_set_hw_state(rfkill, !new_rfk_state))
 347                 bt_rfkill_set_block(data, true);
 348 }
 349
 350 static const struct rfkill_ops toshiba_rfk_ops = {
 351         .set_block = bt_rfkill_set_block,
 352         .poll = bt_rfkill_poll,
 353 };
 354
 355 static struct proc_dir_entry *toshiba_proc_dir /*= 0*/ ;
 356 static struct backlight_device *toshiba_backlight_device;
 357 static int force_fan;
 358 static int last_key_event;
 359 static int key_event_valid;
 360
 361 static int get_lcd(struct backlight_device *bd)
 362 {
 363         u32 hci_result;
 364         u32 value;
 365
 366         hci_read1(HCI_LCD_BRIGHTNESS, &value, &hci_result);
 367         if (hci_result == HCI_SUCCESS) {
 368                 return (value >> HCI_LCD_BRIGHTNESS_SHIFT);
 369         } else
 370                 return -EFAULT;
 371 }
 372
 373 static int lcd_proc_show(struct seq_file *m, void *v)
 374 {
 375         int value = get_lcd(NULL);
 376
 377         if (value >= 0) {
 378                 seq_printf(m, "brightness:              %d\n", value);
 379                 seq_printf(m, "brightness_levels:       %d\n",
 380                              HCI_LCD_BRIGHTNESS_LEVELS);
 381         } else {
 382                 printk(MY_ERR "Error reading LCD brightness\n");
 383         }
 384
 385         return 0;
 386 }
 387
 388 static int lcd_proc_open(struct inode *inode, struct file *file)
 389 {
 390         return single_open(file, lcd_proc_show, NULL);
 391 }
 392
 393 static int set_lcd(int value)
 394 {
 395         u32 hci_result;
 396
 397         value = value << HCI_LCD_BRIGHTNESS_SHIFT;
 398         hci_write1(HCI_LCD_BRIGHTNESS, value, &hci_result);
 399         if (hci_result != HCI_SUCCESS)
 400                 return -EFAULT;
 401
 402         return 0;
 403 }
 404
 405 static int set_lcd_status(struct backlight_device *bd)
 406 {
 407         return set_lcd(bd->props.brightness);
 408 }
 409
 410 static ssize_t lcd_proc_write(struct file *file, const char __user *buf,
 411                               size_t count, loff_t *pos)
 412 {
 413         char cmd[42];
 414         size_t len;
 415         int value;
 416         int ret;
 417
 418         len = min(count, sizeof(cmd) - 1);
 419         if (copy_from_user(cmd, buf, len))
 420                 return -EFAULT;
 421         cmd[len] = '\0';
 422
 423         if (sscanf(cmd, " brightness : %i", &value) == 1 &&
 424             value >= 0 && value < HCI_LCD_BRIGHTNESS_LEVELS) {
 425                 ret = set_lcd(value);
 426                 if (ret == 0)
 427                         ret = count;
 428         } else {
 429                 ret = -EINVAL;
 430         }
 431         return ret;
 432 }
 433
 434 static const struct file_operations lcd_proc_fops = {
 435         .owner          = THIS_MODULE,
 436         .open           = lcd_proc_open,
 437         .read           = seq_read,
 438         .llseek         = seq_lseek,
 439         .release        = single_release,
 440         .write          = lcd_proc_write,
 441 };
 442
 443 static int video_proc_show(struct seq_file *m, void *v)
 444 {
 445         u32 hci_result;
 446         u32 value;
 447
 448         hci_read1(HCI_VIDEO_OUT, &value, &hci_result);
 449         if (hci_result == HCI_SUCCESS) {
 450                 int is_lcd = (value & HCI_VIDEO_OUT_LCD) ? 1 : 0;
 451                 int is_crt = (value & HCI_VIDEO_OUT_CRT) ? 1 : 0;
 452                 int is_tv = (value & HCI_VIDEO_OUT_TV) ? 1 : 0;
 453                 seq_printf(m, "lcd_out:                 %d\n", is_lcd);
 454                 seq_printf(m, "crt_out:                 %d\n", is_crt);
 455                 seq_printf(m, "tv_out:                  %d\n", is_tv);
 456         } else {
 457                 printk(MY_ERR "Error reading video out status\n");
 458         }
 459
 460         return 0;
 461 }
 462
 463 static int video_proc_open(struct inode *inode, struct file *file)
 464 {
 465         return single_open(file, video_proc_show, NULL);
 466 }
 467
 468 static ssize_t video_proc_write(struct file *file, const char __user *buf,
 469                                 size_t count, loff_t *pos)
 470 {
 471         char *cmd, *buffer;
 472         int value;
 473         int remain = count;
 474         int lcd_out = -1;
 475         int crt_out = -1;
 476         int tv_out = -1;
 477         u32 hci_result;
 478         u32 video_out;
 479
 480         cmd = kmalloc(count + 1, GFP_KERNEL);
 481         if (!cmd)
 482                 return -ENOMEM;
 483         if (copy_from_user(cmd, buf, count)) {
 484                 kfree(cmd);
 485                 return -EFAULT;
 486         }
 487         cmd[count] = '\0';
 488
 489         buffer = cmd;
 490
 491         /* scan expression.  Multiple expressions may be delimited with ;
 492          *
 493          *  NOTE: to keep scanning simple, invalid fields are ignored
 494          */
 495         while (remain) {
 496                 if (sscanf(buffer, " lcd_out : %i", &value) == 1)
 497                         lcd_out = value & 1;
 498                 else if (sscanf(buffer, " crt_out : %i", &value) == 1)
 499                         crt_out = value & 1;
 500                 else if (sscanf(buffer, " tv_out : %i", &value) == 1)
 501                         tv_out = value & 1;
 502                 /* advance to one character past the next ; */
 503                 do {
 504                         ++buffer;
 505                         --remain;
 506                 }
 507                 while (remain && *(buffer - 1) != ';');
 508         }
 509
 510         kfree(cmd);
 511
 512         hci_read1(HCI_VIDEO_OUT, &video_out, &hci_result);
 513         if (hci_result == HCI_SUCCESS) {
 514                 unsigned int new_video_out = video_out;
 515                 if (lcd_out != -1)
 516                         _set_bit(&new_video_out, HCI_VIDEO_OUT_LCD, lcd_out);
 517                 if (crt_out != -1)
 518                         _set_bit(&new_video_out, HCI_VIDEO_OUT_CRT, crt_out);
 519                 if (tv_out != -1)
 520                         _set_bit(&new_video_out, HCI_VIDEO_OUT_TV, tv_out);
 521                 /* To avoid unnecessary video disruption, only write the new
 522                  * video setting if something changed. */
 523                 if (new_video_out != video_out)
 524                         write_acpi_int(METHOD_VIDEO_OUT, new_video_out);
 525         } else {
 526                 return -EFAULT;
 527         }
 528
 529         return count;
 530 }
 531
 532 static const struct file_operations video_proc_fops = {
 533         .owner          = THIS_MODULE,
 534         .open           = video_proc_open,
 535         .read           = seq_read,
 536         .llseek         = seq_lseek,
 537         .release        = single_release,
 538         .write          = video_proc_write,
 539 };
 540
 541 static int fan_proc_show(struct seq_file *m, void *v)
 542 {
 543         u32 hci_result;
 544         u32 value;
 545
 546         hci_read1(HCI_FAN, &value, &hci_result);
 547         if (hci_result == HCI_SUCCESS) {
 548                 seq_printf(m, "running:                 %d\n", (value > 0));
 549                 seq_printf(m, "force_on:                %d\n", force_fan);
 550         } else {
 551                 printk(MY_ERR "Error reading fan status\n");
 552         }
 553
 554         return 0;
 555 }
 556
 557 static int fan_proc_open(struct inode *inode, struct file *file)
 558 {
 559         return single_open(file, fan_proc_show, NULL);
 560 }
 561
 562 static ssize_t fan_proc_write(struct file *file, const char __user *buf,
 563                               size_t count, loff_t *pos)
 564 {
 565         char cmd[42];
 566         size_t len;
 567         int value;
 568         u32 hci_result;
 569
 570         len = min(count, sizeof(cmd) - 1);
 571         if (copy_from_user(cmd, buf, len))
 572                 return -EFAULT;
 573         cmd[len] = '\0';
 574
 575         if (sscanf(cmd, " force_on : %i", &value) == 1 &&
 576             value >= 0 && value <= 1) {
 577                 hci_write1(HCI_FAN, value, &hci_result);
 578                 if (hci_result != HCI_SUCCESS)
 579                         return -EFAULT;
 580                 else
 581                         force_fan = value;
 582         } else {
 583                 return -EINVAL;
 584         }
 585
 586         return count;
 587 }
 588
 589 static const struct file_operations fan_proc_fops = {
 590         .owner          = THIS_MODULE,
 591         .open           = fan_proc_open,
 592         .read           = seq_read,
 593         .llseek         = seq_lseek,
 594         .release        = single_release,
 595         .write          = fan_proc_write,
 596 };
 597
 598 static int keys_proc_show(struct seq_file *m, void *v)
 599 {
 600         u32 hci_result;
 601         u32 value;
 602
 603         if (!key_event_valid) {
 604                 hci_read1(HCI_SYSTEM_EVENT, &value, &hci_result);
 605                 if (hci_result == HCI_SUCCESS) {
 606                         key_event_valid = 1;
 607                         last_key_event = value;
 608                 } else if (hci_result == HCI_EMPTY) {
 609                         /* better luck next time */
 610                 } else if (hci_result == HCI_NOT_SUPPORTED) {
 611                         /* This is a workaround for an unresolved issue on
 612                          * some machines where system events sporadically
 613                          * become disabled. */
 614                         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 615                         printk(MY_NOTICE "Re-enabled hotkeys\n");
 616                 } else {
 617                         printk(MY_ERR "Error reading hotkey status\n");
 618                         goto end;
 619                 }
 620         }
 621
 622         seq_printf(m, "hotkey_ready:            %d\n", key_event_valid);
 623         seq_printf(m, "hotkey:                  0x%04x\n", last_key_event);
 624 end:
 625         return 0;
 626 }
 627
 628 static int keys_proc_open(struct inode *inode, struct file *file)
 629 {
 630         return single_open(file, keys_proc_show, NULL);
 631 }
 632
 633 static ssize_t keys_proc_write(struct file *file, const char __user *buf,
 634                                size_t count, loff_t *pos)
 635 {
 636         char cmd[42];
 637         size_t len;
 638         int value;
 639
 640         len = min(count, sizeof(cmd) - 1);
 641         if (copy_from_user(cmd, buf, len))
 642                 return -EFAULT;
 643         cmd[len] = '\0';
 644
 645         if (sscanf(cmd, " hotkey_ready : %i", &value) == 1 && value == 0) {
 646                 key_event_valid = 0;
 647         } else {
 648                 return -EINVAL;
 649         }
 650
 651         return count;
 652 }
 653
 654 static const struct file_operations keys_proc_fops = {
 655         .owner          = THIS_MODULE,
 656         .open           = keys_proc_open,
 657         .read           = seq_read,
 658         .llseek         = seq_lseek,
 659         .release        = single_release,
 660         .write          = keys_proc_write,
 661 };
 662
 663 static int version_proc_show(struct seq_file *m, void *v)
 664 {
 665         seq_printf(m, "driver:                  %s\n", TOSHIBA_ACPI_VERSION);
 666         seq_printf(m, "proc_interface:          %d\n", PROC_INTERFACE_VERSION);
 667         return 0;
 668 }
 669
 670 static int version_proc_open(struct inode *inode, struct file *file)
 671 {
 672         return single_open(file, version_proc_show, PDE(inode)->data);
 673 }
 674
 675 static const struct file_operations version_proc_fops = {
 676         .owner          = THIS_MODULE,
 677         .open           = version_proc_open,
 678         .read           = seq_read,
 679         .llseek         = seq_lseek,
 680         .release        = single_release,
 681 };
 682
 683 /* proc and module init
 684  */
 685
 686 #define PROC_TOSHIBA            "toshiba"
 687
 688 static acpi_status __init add_device(void)
 689 {
 690         proc_create("lcd", S_IRUGO | S_IWUSR, toshiba_proc_dir, &lcd_proc_fops);
 691         proc_create("video", S_IRUGO | S_IWUSR, toshiba_proc_dir, &video_proc_fops);
 692         proc_create("fan", S_IRUGO | S_IWUSR, toshiba_proc_dir, &fan_proc_fops);
 693         proc_create("keys", S_IRUGO | S_IWUSR, toshiba_proc_dir, &keys_proc_fops);
 694         proc_create("version", S_IRUGO, toshiba_proc_dir, &version_proc_fops);
 695
 696         return AE_OK;
 697 }
 698
 699 static acpi_status remove_device(void)
 700 {
 701         remove_proc_entry("lcd", toshiba_proc_dir);
 702         remove_proc_entry("video", toshiba_proc_dir);
 703         remove_proc_entry("fan", toshiba_proc_dir);
 704         remove_proc_entry("keys", toshiba_proc_dir);
 705         remove_proc_entry("version", toshiba_proc_dir);
 706         return AE_OK;
 707 }
 708
 709 static struct backlight_ops toshiba_backlight_data = {
 710         .get_brightness = get_lcd,
 711         .update_status  = set_lcd_status,
 712 };
 713
 714 static void toshiba_acpi_exit(void)
 715 {
 716         if (toshiba_acpi.bt_rfk) {
 717                 rfkill_unregister(toshiba_acpi.bt_rfk);
 718                 rfkill_destroy(toshiba_acpi.bt_rfk);
 719         }
 720
 721         if (toshiba_backlight_device)
 722                 backlight_device_unregister(toshiba_backlight_device);
 723
 724         remove_device();
 725
 726         if (toshiba_proc_dir)
 727                 remove_proc_entry(PROC_TOSHIBA, acpi_root_dir);
 728
 729         platform_device_unregister(toshiba_acpi.p_dev);
 730
 731         return;
 732 }
 733
 734 static int __init toshiba_acpi_init(void)
 735 {
 736         acpi_status status = AE_OK;
 737         u32 hci_result;
 738         bool bt_present;
 739         int ret = 0;
 740
 741         if (acpi_disabled)
 742                 return -ENODEV;
 743
 744         /* simple device detection: look for HCI method */
 745         if (is_valid_acpi_path(METHOD_HCI_1))
 746                 method_hci = METHOD_HCI_1;
 747         else if (is_valid_acpi_path(METHOD_HCI_2))
 748                 method_hci = METHOD_HCI_2;
 749         else
 750                 return -ENODEV;
 751
 752         printk(MY_INFO "Toshiba Laptop ACPI Extras version %s\n",
 753                TOSHIBA_ACPI_VERSION);
 754         printk(MY_INFO "    HCI method: %s\n", method_hci);
 755
 756         mutex_init(&toshiba_acpi.mutex);
 757
 758         toshiba_acpi.p_dev = platform_device_register_simple("toshiba_acpi",
 759                                                               -1, NULL, 0);
 760         if (IS_ERR(toshiba_acpi.p_dev)) {
 761                 ret = PTR_ERR(toshiba_acpi.p_dev);
 762                 printk(MY_ERR "unable to register platform device\n");
 763                 toshiba_acpi.p_dev = NULL;
 764                 toshiba_acpi_exit();
 765                 return ret;
 766         }
 767
 768         force_fan = 0;
 769         key_event_valid = 0;
 770
 771         /* enable event fifo */
 772         hci_write1(HCI_SYSTEM_EVENT, 1, &hci_result);
 773
 774         toshiba_proc_dir = proc_mkdir(PROC_TOSHIBA, acpi_root_dir);
 775         if (!toshiba_proc_dir) {
 776                 toshiba_acpi_exit();
 777                 return -ENODEV;
 778         } else {
 779                 status = add_device();
 780                 if (ACPI_FAILURE(status)) {
 781                         toshiba_acpi_exit();
 782                         return -ENODEV;
 783                 }
 784         }
 785
 786         toshiba_backlight_device = backlight_device_register("toshiba",
 787                                                 &toshiba_acpi.p_dev->dev,
 788                                                 NULL,
 789                                                 &toshiba_backlight_data);
 790         if (IS_ERR(toshiba_backlight_device)) {
 791                 ret = PTR_ERR(toshiba_backlight_device);
 792
 793                 printk(KERN_ERR "Could not register toshiba backlight device\n");
 794                 toshiba_backlight_device = NULL;
 795                 toshiba_acpi_exit();
 796                 return ret;
 797         }
 798         toshiba_backlight_device->props.max_brightness = HCI_LCD_BRIGHTNESS_LEVELS - 1;
 799
 800         /* Register rfkill switch for Bluetooth */
 801         if (hci_get_bt_present(&bt_present) == HCI_SUCCESS && bt_present) {
 802                 toshiba_acpi.bt_rfk = rfkill_alloc(toshiba_acpi.bt_name,
 803                                                    &toshiba_acpi.p_dev->dev,
 804                                                    RFKILL_TYPE_BLUETOOTH,
 805                                                    &toshiba_rfk_ops,
 806                                                    &toshiba_acpi);
 807                 if (!toshiba_acpi.bt_rfk) {
 808                         printk(MY_ERR "unable to allocate rfkill device\n");
 809                         toshiba_acpi_exit();
 810                         return -ENOMEM;
 811                 }
 812
 813                 ret = rfkill_register(toshiba_acpi.bt_rfk);
 814                 if (ret) {
 815                         printk(MY_ERR "unable to register rfkill device\n");
 816                         rfkill_destroy(toshiba_acpi.bt_rfk);
 817                         toshiba_acpi_exit();
 818                         return ret;
 819                 }
 820         }
 821
 822         return 0;
 823 }
 824
 825 module_init(toshiba_acpi_init);
 826 module_exit(toshiba_acpi_exit);