drivers/misc/eeepc-laptop.c

   1 /*
   2  *  eepc-laptop.c - Asus Eee PC extras
   3  *
   4  *  Based on asus_acpi.c as patched for the Eee PC by Asus:
   5  *  ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
   6  *  Based on eee.c from eeepc-linux
   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
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/init.h>
  22 #include <linux/types.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/backlight.h>
  25 #include <linux/fb.h>
  26 #include <linux/hwmon.h>
  27 #include <linux/hwmon-sysfs.h>
  28 #include <acpi/acpi_drivers.h>
  29 #include <acpi/acpi_bus.h>
  30 #include <linux/uaccess.h>
  31 #include <linux/input.h>
  32 #include <linux/rfkill.h>
  33
  34 #define EEEPC_LAPTOP_VERSION    "0.1"
  35
  36 #define EEEPC_HOTK_NAME         "Eee PC Hotkey Driver"
  37 #define EEEPC_HOTK_FILE         "eeepc"
  38 #define EEEPC_HOTK_CLASS        "hotkey"
  39 #define EEEPC_HOTK_DEVICE_NAME  "Hotkey"
  40 #define EEEPC_HOTK_HID          "ASUS010"
  41
  42 #define EEEPC_LOG       EEEPC_HOTK_FILE ": "
  43 #define EEEPC_ERR       KERN_ERR        EEEPC_LOG
  44 #define EEEPC_WARNING   KERN_WARNING    EEEPC_LOG
  45 #define EEEPC_NOTICE    KERN_NOTICE     EEEPC_LOG
  46 #define EEEPC_INFO      KERN_INFO       EEEPC_LOG
  47
  48 /*
  49  * Definitions for Asus EeePC
  50  */
  51 #define NOTIFY_WLAN_ON  0x10
  52 #define NOTIFY_BRN_MIN  0x20
  53 #define NOTIFY_BRN_MAX  0x2f
  54
  55 enum {
  56         DISABLE_ASL_WLAN = 0x0001,
  57         DISABLE_ASL_BLUETOOTH = 0x0002,
  58         DISABLE_ASL_IRDA = 0x0004,
  59         DISABLE_ASL_CAMERA = 0x0008,
  60         DISABLE_ASL_TV = 0x0010,
  61         DISABLE_ASL_GPS = 0x0020,
  62         DISABLE_ASL_DISPLAYSWITCH = 0x0040,
  63         DISABLE_ASL_MODEM = 0x0080,
  64         DISABLE_ASL_CARDREADER = 0x0100
  65 };
  66
  67 enum {
  68         CM_ASL_WLAN = 0,
  69         CM_ASL_BLUETOOTH,
  70         CM_ASL_IRDA,
  71         CM_ASL_1394,
  72         CM_ASL_CAMERA,
  73         CM_ASL_TV,
  74         CM_ASL_GPS,
  75         CM_ASL_DVDROM,
  76         CM_ASL_DISPLAYSWITCH,
  77         CM_ASL_PANELBRIGHT,
  78         CM_ASL_BIOSFLASH,
  79         CM_ASL_ACPIFLASH,
  80         CM_ASL_CPUFV,
  81         CM_ASL_CPUTEMPERATURE,
  82         CM_ASL_FANCPU,
  83         CM_ASL_FANCHASSIS,
  84         CM_ASL_USBPORT1,
  85         CM_ASL_USBPORT2,
  86         CM_ASL_USBPORT3,
  87         CM_ASL_MODEM,
  88         CM_ASL_CARDREADER,
  89         CM_ASL_LID
  90 };
  91
  92 static const char *cm_getv[] = {
  93         "WLDG", NULL, NULL, NULL,
  94         "CAMG", NULL, NULL, NULL,
  95         NULL, "PBLG", NULL, NULL,
  96         "CFVG", NULL, NULL, NULL,
  97         "USBG", NULL, NULL, "MODG",
  98         "CRDG", "LIDG"
  99 };
 100
 101 static const char *cm_setv[] = {
 102         "WLDS", NULL, NULL, NULL,
 103         "CAMS", NULL, NULL, NULL,
 104         "SDSP", "PBLS", "HDPS", NULL,
 105         "CFVS", NULL, NULL, NULL,
 106         "USBG", NULL, NULL, "MODS",
 107         "CRDS", NULL
 108 };
 109
 110 #define EEEPC_EC        "\\_SB.PCI0.SBRG.EC0."
 111
 112 #define EEEPC_EC_FAN_PWM        EEEPC_EC "SC02" /* Fan PWM duty cycle (%) */
 113 #define EEEPC_EC_SC02           0x63
 114 #define EEEPC_EC_FAN_HRPM       EEEPC_EC "SC05" /* High byte, fan speed (RPM) */
 115 #define EEEPC_EC_FAN_LRPM       EEEPC_EC "SC06" /* Low byte, fan speed (RPM) */
 116 #define EEEPC_EC_FAN_CTRL       EEEPC_EC "SFB3" /* Byte containing SF25  */
 117 #define EEEPC_EC_SFB3           0xD3
 118
 119 /*
 120  * This is the main structure, we can use it to store useful information
 121  * about the hotk device
 122  */
 123 struct eeepc_hotk {
 124         struct acpi_device *device;     /* the device we are in */
 125         acpi_handle handle;             /* the handle of the hotk device */
 126         u32 cm_supported;               /* the control methods supported
 127                                            by this BIOS */
 128         uint init_flag;                 /* Init flags */
 129         u16 event_count[128];           /* count for each event */
 130         struct input_dev *inputdev;
 131         u16 *keycode_map;
 132         struct rfkill *eeepc_wlan_rfkill;
 133         struct rfkill *eeepc_bluetooth_rfkill;
 134 };
 135
 136 /* The actual device the driver binds to */
 137 static struct eeepc_hotk *ehotk;
 138
 139 /* Platform device/driver */
 140 static struct platform_driver platform_driver = {
 141         .driver = {
 142                 .name = EEEPC_HOTK_FILE,
 143                 .owner = THIS_MODULE,
 144         }
 145 };
 146
 147 static struct platform_device *platform_device;
 148
 149 struct key_entry {
 150         char type;
 151         u8 code;
 152         u16 keycode;
 153 };
 154
 155 enum { KE_KEY, KE_END };
 156
 157 static struct key_entry eeepc_keymap[] = {
 158         /* Sleep already handled via generic ACPI code */
 159         {KE_KEY, 0x10, KEY_WLAN },
 160         {KE_KEY, 0x12, KEY_PROG1 },
 161         {KE_KEY, 0x13, KEY_MUTE },
 162         {KE_KEY, 0x14, KEY_VOLUMEDOWN },
 163         {KE_KEY, 0x15, KEY_VOLUMEUP },
 164         {KE_KEY, 0x1a, KEY_COFFEE },
 165         {KE_KEY, 0x1b, KEY_ZOOM },
 166         {KE_KEY, 0x1c, KEY_PROG2 },
 167         {KE_KEY, 0x1d, KEY_PROG3 },
 168         {KE_KEY, 0x30, KEY_SWITCHVIDEOMODE },
 169         {KE_KEY, 0x31, KEY_SWITCHVIDEOMODE },
 170         {KE_KEY, 0x32, KEY_SWITCHVIDEOMODE },
 171         {KE_END, 0},
 172 };
 173
 174 /*
 175  * The hotkey driver declaration
 176  */
 177 static int eeepc_hotk_add(struct acpi_device *device);
 178 static int eeepc_hotk_remove(struct acpi_device *device, int type);
 179
 180 static const struct acpi_device_id eeepc_device_ids[] = {
 181         {EEEPC_HOTK_HID, 0},
 182         {"", 0},
 183 };
 184 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
 185
 186 static struct acpi_driver eeepc_hotk_driver = {
 187         .name = EEEPC_HOTK_NAME,
 188         .class = EEEPC_HOTK_CLASS,
 189         .ids = eeepc_device_ids,
 190         .ops = {
 191                 .add = eeepc_hotk_add,
 192                 .remove = eeepc_hotk_remove,
 193         },
 194 };
 195
 196 /* The backlight device /sys/class/backlight */
 197 static struct backlight_device *eeepc_backlight_device;
 198
 199 /* The hwmon device */
 200 static struct device *eeepc_hwmon_device;
 201
 202 /*
 203  * The backlight class declaration
 204  */
 205 static int read_brightness(struct backlight_device *bd);
 206 static int update_bl_status(struct backlight_device *bd);
 207 static struct backlight_ops eeepcbl_ops = {
 208         .get_brightness = read_brightness,
 209         .update_status = update_bl_status,
 210 };
 211
 212 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
 213 MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
 214 MODULE_LICENSE("GPL");
 215
 216 /*
 217  * ACPI Helpers
 218  */
 219 static int write_acpi_int(acpi_handle handle, const char *method, int val,
 220                           struct acpi_buffer *output)
 221 {
 222         struct acpi_object_list params;
 223         union acpi_object in_obj;
 224         acpi_status status;
 225
 226         params.count = 1;
 227         params.pointer = &in_obj;
 228         in_obj.type = ACPI_TYPE_INTEGER;
 229         in_obj.integer.value = val;
 230
 231         status = acpi_evaluate_object(handle, (char *)method, &params, output);
 232         return (status == AE_OK ? 0 : -1);
 233 }
 234
 235 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 236 {
 237         acpi_status status;
 238         unsigned long long result;
 239
 240         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 241         if (ACPI_FAILURE(status)) {
 242                 *val = -1;
 243                 return -1;
 244         } else {
 245                 *val = result;
 246                 return 0;
 247         }
 248 }
 249
 250 static int set_acpi(int cm, int value)
 251 {
 252         if (ehotk->cm_supported & (0x1 << cm)) {
 253                 const char *method = cm_setv[cm];
 254                 if (method == NULL)
 255                         return -ENODEV;
 256                 if (write_acpi_int(ehotk->handle, method, value, NULL))
 257                         printk(EEEPC_WARNING "Error writing %s\n", method);
 258         }
 259         return 0;
 260 }
 261
 262 static int get_acpi(int cm)
 263 {
 264         int value = -1;
 265         if ((ehotk->cm_supported & (0x1 << cm))) {
 266                 const char *method = cm_getv[cm];
 267                 if (method == NULL)
 268                         return -ENODEV;
 269                 if (read_acpi_int(ehotk->handle, method, &value))
 270                         printk(EEEPC_WARNING "Error reading %s\n", method);
 271         }
 272         return value;
 273 }
 274
 275 /*
 276  * Backlight
 277  */
 278 static int read_brightness(struct backlight_device *bd)
 279 {
 280         return get_acpi(CM_ASL_PANELBRIGHT);
 281 }
 282
 283 static int set_brightness(struct backlight_device *bd, int value)
 284 {
 285         value = max(0, min(15, value));
 286         return set_acpi(CM_ASL_PANELBRIGHT, value);
 287 }
 288
 289 static int update_bl_status(struct backlight_device *bd)
 290 {
 291         return set_brightness(bd, bd->props.brightness);
 292 }
 293
 294 /*
 295  * Rfkill helpers
 296  */
 297
 298 static int eeepc_wlan_rfkill_set(void *data, enum rfkill_state state)
 299 {
 300         if (state == RFKILL_STATE_SOFT_BLOCKED)
 301                 return set_acpi(CM_ASL_WLAN, 0);
 302         else
 303                 return set_acpi(CM_ASL_WLAN, 1);
 304 }
 305
 306 static int eeepc_wlan_rfkill_state(void *data, enum rfkill_state *state)
 307 {
 308         if (get_acpi(CM_ASL_WLAN) == 1)
 309                 *state = RFKILL_STATE_UNBLOCKED;
 310         else
 311                 *state = RFKILL_STATE_SOFT_BLOCKED;
 312         return 0;
 313 }
 314
 315 static int eeepc_bluetooth_rfkill_set(void *data, enum rfkill_state state)
 316 {
 317         if (state == RFKILL_STATE_SOFT_BLOCKED)
 318                 return set_acpi(CM_ASL_BLUETOOTH, 0);
 319         else
 320                 return set_acpi(CM_ASL_BLUETOOTH, 1);
 321 }
 322
 323 static int eeepc_bluetooth_rfkill_state(void *data, enum rfkill_state *state)
 324 {
 325         if (get_acpi(CM_ASL_BLUETOOTH) == 1)
 326                 *state = RFKILL_STATE_UNBLOCKED;
 327         else
 328                 *state = RFKILL_STATE_SOFT_BLOCKED;
 329         return 0;
 330 }
 331
 332 /*
 333  * Sys helpers
 334  */
 335 static int parse_arg(const char *buf, unsigned long count, int *val)
 336 {
 337         if (!count)
 338                 return 0;
 339         if (sscanf(buf, "%i", val) != 1)
 340                 return -EINVAL;
 341         return count;
 342 }
 343
 344 static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
 345 {
 346         int rv, value;
 347
 348         rv = parse_arg(buf, count, &value);
 349         if (rv > 0)
 350                 set_acpi(cm, value);
 351         return rv;
 352 }
 353
 354 static ssize_t show_sys_acpi(int cm, char *buf)
 355 {
 356         return sprintf(buf, "%d\n", get_acpi(cm));
 357 }
 358
 359 #define EEEPC_CREATE_DEVICE_ATTR(_name, _cm)                            \
 360         static ssize_t show_##_name(struct device *dev,                 \
 361                                     struct device_attribute *attr,      \
 362                                     char *buf)                          \
 363         {                                                               \
 364                 return show_sys_acpi(_cm, buf);                         \
 365         }                                                               \
 366         static ssize_t store_##_name(struct device *dev,                \
 367                                      struct device_attribute *attr,     \
 368                                      const char *buf, size_t count)     \
 369         {                                                               \
 370                 return store_sys_acpi(_cm, buf, count);                 \
 371         }                                                               \
 372         static struct device_attribute dev_attr_##_name = {             \
 373                 .attr = {                                               \
 374                         .name = __stringify(_name),                     \
 375                         .mode = 0644 },                                 \
 376                 .show   = show_##_name,                                 \
 377                 .store  = store_##_name,                                \
 378         }
 379
 380 EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
 381 EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
 382 EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
 383
 384 static struct attribute *platform_attributes[] = {
 385         &dev_attr_camera.attr,
 386         &dev_attr_cardr.attr,
 387         &dev_attr_disp.attr,
 388         NULL
 389 };
 390
 391 static struct attribute_group platform_attribute_group = {
 392         .attrs = platform_attributes
 393 };
 394
 395 /*
 396  * Hotkey functions
 397  */
 398 static struct key_entry *eepc_get_entry_by_scancode(int code)
 399 {
 400         struct key_entry *key;
 401
 402         for (key = eeepc_keymap; key->type != KE_END; key++)
 403                 if (code == key->code)
 404                         return key;
 405
 406         return NULL;
 407 }
 408
 409 static struct key_entry *eepc_get_entry_by_keycode(int code)
 410 {
 411         struct key_entry *key;
 412
 413         for (key = eeepc_keymap; key->type != KE_END; key++)
 414                 if (code == key->keycode && key->type == KE_KEY)
 415                         return key;
 416
 417         return NULL;
 418 }
 419
 420 static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
 421 {
 422         struct key_entry *key = eepc_get_entry_by_scancode(scancode);
 423
 424         if (key && key->type == KE_KEY) {
 425                 *keycode = key->keycode;
 426                 return 0;
 427         }
 428
 429         return -EINVAL;
 430 }
 431
 432 static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
 433 {
 434         struct key_entry *key;
 435         int old_keycode;
 436
 437         if (keycode < 0 || keycode > KEY_MAX)
 438                 return -EINVAL;
 439
 440         key = eepc_get_entry_by_scancode(scancode);
 441         if (key && key->type == KE_KEY) {
 442                 old_keycode = key->keycode;
 443                 key->keycode = keycode;
 444                 set_bit(keycode, dev->keybit);
 445                 if (!eepc_get_entry_by_keycode(old_keycode))
 446                         clear_bit(old_keycode, dev->keybit);
 447                 return 0;
 448         }
 449
 450         return -EINVAL;
 451 }
 452
 453 static int eeepc_hotk_check(void)
 454 {
 455         const struct key_entry *key;
 456         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 457         int result;
 458
 459         result = acpi_bus_get_status(ehotk->device);
 460         if (result)
 461                 return result;
 462         if (ehotk->device->status.present) {
 463                 if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
 464                                     &buffer)) {
 465                         printk(EEEPC_ERR "Hotkey initialization failed\n");
 466                         return -ENODEV;
 467                 } else {
 468                         printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
 469                                ehotk->init_flag);
 470                 }
 471                 /* get control methods supported */
 472                 if (read_acpi_int(ehotk->handle, "CMSG"
 473                                    , &ehotk->cm_supported)) {
 474                         printk(EEEPC_ERR
 475                                "Get control methods supported failed\n");
 476                         return -ENODEV;
 477                 } else {
 478                         printk(EEEPC_INFO
 479                                "Get control methods supported: 0x%x\n",
 480                                ehotk->cm_supported);
 481                 }
 482                 ehotk->inputdev = input_allocate_device();
 483                 if (!ehotk->inputdev) {
 484                         printk(EEEPC_INFO "Unable to allocate input device\n");
 485                         return 0;
 486                 }
 487                 ehotk->inputdev->name = "Asus EeePC extra buttons";
 488                 ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
 489                 ehotk->inputdev->id.bustype = BUS_HOST;
 490                 ehotk->inputdev->getkeycode = eeepc_getkeycode;
 491                 ehotk->inputdev->setkeycode = eeepc_setkeycode;
 492
 493                 for (key = eeepc_keymap; key->type != KE_END; key++) {
 494                         switch (key->type) {
 495                         case KE_KEY:
 496                                 set_bit(EV_KEY, ehotk->inputdev->evbit);
 497                                 set_bit(key->keycode, ehotk->inputdev->keybit);
 498                                 break;
 499                         }
 500                 }
 501                 result = input_register_device(ehotk->inputdev);
 502                 if (result) {
 503                         printk(EEEPC_INFO "Unable to register input device\n");
 504                         input_free_device(ehotk->inputdev);
 505                         return 0;
 506                 }
 507         } else {
 508                 printk(EEEPC_ERR "Hotkey device not present, aborting\n");
 509                 return -EINVAL;
 510         }
 511         return 0;
 512 }
 513
 514 static void notify_brn(void)
 515 {
 516         struct backlight_device *bd = eeepc_backlight_device;
 517         if (bd)
 518                 bd->props.brightness = read_brightness(bd);
 519 }
 520
 521 static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
 522 {
 523         static struct key_entry *key;
 524         if (!ehotk)
 525                 return;
 526         if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
 527                 notify_brn();
 528         acpi_bus_generate_proc_event(ehotk->device, event,
 529                                      ehotk->event_count[event % 128]++);
 530         if (ehotk->inputdev) {
 531                 key = eepc_get_entry_by_scancode(event);
 532                 if (key) {
 533                         switch (key->type) {
 534                         case KE_KEY:
 535                                 input_report_key(ehotk->inputdev, key->keycode,
 536                                                  1);
 537                                 input_sync(ehotk->inputdev);
 538                                 input_report_key(ehotk->inputdev, key->keycode,
 539                                                  0);
 540                                 input_sync(ehotk->inputdev);
 541                                 break;
 542                         }
 543                 }
 544         }
 545 }
 546
 547 static int eeepc_hotk_add(struct acpi_device *device)
 548 {
 549         acpi_status status = AE_OK;
 550         int result;
 551
 552         if (!device)
 553                  return -EINVAL;
 554         printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
 555         ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
 556         if (!ehotk)
 557                 return -ENOMEM;
 558         ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
 559         ehotk->handle = device->handle;
 560         strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
 561         strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
 562         device->driver_data = ehotk;
 563         ehotk->device = device;
 564         result = eeepc_hotk_check();
 565         if (result)
 566                 goto end;
 567         status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 568                                              eeepc_hotk_notify, ehotk);
 569         if (ACPI_FAILURE(status))
 570                 printk(EEEPC_ERR "Error installing notify handler\n");
 571
 572         if (get_acpi(CM_ASL_WLAN) != -1) {
 573                 ehotk->eeepc_wlan_rfkill = rfkill_allocate(&device->dev,
 574                                                            RFKILL_TYPE_WLAN);
 575
 576                 if (!ehotk->eeepc_wlan_rfkill)
 577                         goto end;
 578
 579                 ehotk->eeepc_wlan_rfkill->name = "eeepc-wlan";
 580                 ehotk->eeepc_wlan_rfkill->toggle_radio = eeepc_wlan_rfkill_set;
 581                 ehotk->eeepc_wlan_rfkill->get_state = eeepc_wlan_rfkill_state;
 582                 if (get_acpi(CM_ASL_WLAN) == 1)
 583                         ehotk->eeepc_wlan_rfkill->state =
 584                                 RFKILL_STATE_UNBLOCKED;
 585                 else
 586                         ehotk->eeepc_wlan_rfkill->state =
 587                                 RFKILL_STATE_SOFT_BLOCKED;
 588                 rfkill_register(ehotk->eeepc_wlan_rfkill);
 589         }
 590
 591         if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
 592                 ehotk->eeepc_bluetooth_rfkill =
 593                         rfkill_allocate(&device->dev, RFKILL_TYPE_BLUETOOTH);
 594
 595                 if (!ehotk->eeepc_bluetooth_rfkill)
 596                         goto end;
 597
 598                 ehotk->eeepc_bluetooth_rfkill->name = "eeepc-bluetooth";
 599                 ehotk->eeepc_bluetooth_rfkill->toggle_radio =
 600                         eeepc_bluetooth_rfkill_set;
 601                 ehotk->eeepc_bluetooth_rfkill->get_state =
 602                         eeepc_bluetooth_rfkill_state;
 603                 if (get_acpi(CM_ASL_BLUETOOTH) == 1)
 604                         ehotk->eeepc_bluetooth_rfkill->state =
 605                                 RFKILL_STATE_UNBLOCKED;
 606                 else
 607                         ehotk->eeepc_bluetooth_rfkill->state =
 608                                 RFKILL_STATE_SOFT_BLOCKED;
 609                 rfkill_register(ehotk->eeepc_bluetooth_rfkill);
 610         }
 611
 612  end:
 613         if (result) {
 614                 kfree(ehotk);
 615                 ehotk = NULL;
 616         }
 617         return result;
 618 }
 619
 620 static int eeepc_hotk_remove(struct acpi_device *device, int type)
 621 {
 622         acpi_status status = 0;
 623
 624         if (!device || !acpi_driver_data(device))
 625                  return -EINVAL;
 626         status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 627                                             eeepc_hotk_notify);
 628         if (ACPI_FAILURE(status))
 629                 printk(EEEPC_ERR "Error removing notify handler\n");
 630         kfree(ehotk);
 631         return 0;
 632 }
 633
 634 /*
 635  * Hwmon
 636  */
 637 static int eeepc_get_fan_pwm(void)
 638 {
 639         int value = 0;
 640
 641         read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
 642         value = value * 255 / 100;
 643         return (value);
 644 }
 645
 646 static void eeepc_set_fan_pwm(int value)
 647 {
 648         value = SENSORS_LIMIT(value, 0, 255);
 649         value = value * 100 / 255;
 650         ec_write(EEEPC_EC_SC02, value);
 651 }
 652
 653 static int eeepc_get_fan_rpm(void)
 654 {
 655         int high = 0;
 656         int low = 0;
 657
 658         read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
 659         read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
 660         return (high << 8 | low);
 661 }
 662
 663 static int eeepc_get_fan_ctrl(void)
 664 {
 665         int value = 0;
 666
 667         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 668         return ((value & 0x02 ? 1 : 0));
 669 }
 670
 671 static void eeepc_set_fan_ctrl(int manual)
 672 {
 673         int value = 0;
 674
 675         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 676         if (manual)
 677                 value |= 0x02;
 678         else
 679                 value &= ~0x02;
 680         ec_write(EEEPC_EC_SFB3, value);
 681 }
 682
 683 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 684 {
 685         int rv, value;
 686
 687         rv = parse_arg(buf, count, &value);
 688         if (rv > 0)
 689                 set(value);
 690         return rv;
 691 }
 692
 693 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
 694 {
 695         return sprintf(buf, "%d\n", get());
 696 }
 697
 698 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get)              \
 699         static ssize_t show_##_name(struct device *dev,                 \
 700                                     struct device_attribute *attr,      \
 701                                     char *buf)                          \
 702         {                                                               \
 703                 return show_sys_hwmon(_set, buf);                       \
 704         }                                                               \
 705         static ssize_t store_##_name(struct device *dev,                \
 706                                      struct device_attribute *attr,     \
 707                                      const char *buf, size_t count)     \
 708         {                                                               \
 709                 return store_sys_hwmon(_get, buf, count);               \
 710         }                                                               \
 711         static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
 712
 713 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
 714 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
 715                          eeepc_get_fan_pwm, eeepc_set_fan_pwm);
 716 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 717                          eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
 718
 719 static ssize_t
 720 show_name(struct device *dev, struct device_attribute *attr, char *buf)
 721 {
 722         return sprintf(buf, "eeepc\n");
 723 }
 724 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
 725
 726 static struct attribute *hwmon_attributes[] = {
 727         &sensor_dev_attr_pwm1.dev_attr.attr,
 728         &sensor_dev_attr_fan1_input.dev_attr.attr,
 729         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 730         &sensor_dev_attr_name.dev_attr.attr,
 731         NULL
 732 };
 733
 734 static struct attribute_group hwmon_attribute_group = {
 735         .attrs = hwmon_attributes
 736 };
 737
 738 /*
 739  * exit/init
 740  */
 741 static void eeepc_backlight_exit(void)
 742 {
 743         if (eeepc_backlight_device)
 744                 backlight_device_unregister(eeepc_backlight_device);
 745         if (ehotk->inputdev)
 746                 input_unregister_device(ehotk->inputdev);
 747         if (ehotk->eeepc_wlan_rfkill)
 748                 rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 749         if (ehotk->eeepc_bluetooth_rfkill)
 750                 rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
 751         eeepc_backlight_device = NULL;
 752 }
 753
 754 static void eeepc_hwmon_exit(void)
 755 {
 756         struct device *hwmon;
 757
 758         hwmon = eeepc_hwmon_device;
 759         if (!hwmon)
 760                 return ;
 761         sysfs_remove_group(&hwmon->kobj,
 762                            &hwmon_attribute_group);
 763         hwmon_device_unregister(hwmon);
 764         eeepc_hwmon_device = NULL;
 765 }
 766
 767 static void __exit eeepc_laptop_exit(void)
 768 {
 769         eeepc_backlight_exit();
 770         eeepc_hwmon_exit();
 771         acpi_bus_unregister_driver(&eeepc_hotk_driver);
 772         sysfs_remove_group(&platform_device->dev.kobj,
 773                            &platform_attribute_group);
 774         platform_device_unregister(platform_device);
 775         platform_driver_unregister(&platform_driver);
 776 }
 777
 778 static int eeepc_backlight_init(struct device *dev)
 779 {
 780         struct backlight_device *bd;
 781
 782         bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
 783                                        NULL, &eeepcbl_ops);
 784         if (IS_ERR(bd)) {
 785                 printk(EEEPC_ERR
 786                        "Could not register eeepc backlight device\n");
 787                 eeepc_backlight_device = NULL;
 788                 return PTR_ERR(bd);
 789         }
 790         eeepc_backlight_device = bd;
 791         bd->props.max_brightness = 15;
 792         bd->props.brightness = read_brightness(NULL);
 793         bd->props.power = FB_BLANK_UNBLANK;
 794         backlight_update_status(bd);
 795         return 0;
 796 }
 797
 798 static int eeepc_hwmon_init(struct device *dev)
 799 {
 800         struct device *hwmon;
 801         int result;
 802
 803         hwmon = hwmon_device_register(dev);
 804         if (IS_ERR(hwmon)) {
 805                 printk(EEEPC_ERR
 806                        "Could not register eeepc hwmon device\n");
 807                 eeepc_hwmon_device = NULL;
 808                 return PTR_ERR(hwmon);
 809         }
 810         eeepc_hwmon_device = hwmon;
 811         result = sysfs_create_group(&hwmon->kobj,
 812                                     &hwmon_attribute_group);
 813         if (result)
 814                 eeepc_hwmon_exit();
 815         return result;
 816 }
 817
 818 static int __init eeepc_laptop_init(void)
 819 {
 820         struct device *dev;
 821         int result;
 822
 823         if (acpi_disabled)
 824                 return -ENODEV;
 825         result = acpi_bus_register_driver(&eeepc_hotk_driver);
 826         if (result < 0)
 827                 return result;
 828         if (!ehotk) {
 829                 acpi_bus_unregister_driver(&eeepc_hotk_driver);
 830                 return -ENODEV;
 831         }
 832         dev = acpi_get_physical_device(ehotk->device->handle);
 833
 834         if (!acpi_video_backlight_support()) {
 835                 result = eeepc_backlight_init(dev);
 836                 if (result)
 837                         goto fail_backlight;
 838         } else
 839                 printk(EEEPC_INFO "Backlight controlled by ACPI video "
 840                        "driver\n");
 841
 842         result = eeepc_hwmon_init(dev);
 843         if (result)
 844                 goto fail_hwmon;
 845         /* Register platform stuff */
 846         result = platform_driver_register(&platform_driver);
 847         if (result)
 848                 goto fail_platform_driver;
 849         platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
 850         if (!platform_device) {
 851                 result = -ENOMEM;
 852                 goto fail_platform_device1;
 853         }
 854         result = platform_device_add(platform_device);
 855         if (result)
 856                 goto fail_platform_device2;
 857         result = sysfs_create_group(&platform_device->dev.kobj,
 858                                     &platform_attribute_group);
 859         if (result)
 860                 goto fail_sysfs;
 861         return 0;
 862 fail_sysfs:
 863         platform_device_del(platform_device);
 864 fail_platform_device2:
 865         platform_device_put(platform_device);
 866 fail_platform_device1:
 867         platform_driver_unregister(&platform_driver);
 868 fail_platform_driver:
 869         eeepc_hwmon_exit();
 870 fail_hwmon:
 871         eeepc_backlight_exit();
 872 fail_backlight:
 873         return result;
 874 }
 875
 876 module_init(eeepc_laptop_init);
 877 module_exit(eeepc_laptop_exit);