drivers/platform/x86/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 #include <linux/pci.h>
  34
  35 #define EEEPC_LAPTOP_VERSION    "0.1"
  36
  37 #define EEEPC_HOTK_NAME         "Eee PC Hotkey Driver"
  38 #define EEEPC_HOTK_FILE         "eeepc"
  39 #define EEEPC_HOTK_CLASS        "hotkey"
  40 #define EEEPC_HOTK_DEVICE_NAME  "Hotkey"
  41 #define EEEPC_HOTK_HID          "ASUS010"
  42
  43 #define EEEPC_LOG       EEEPC_HOTK_FILE ": "
  44 #define EEEPC_ERR       KERN_ERR        EEEPC_LOG
  45 #define EEEPC_WARNING   KERN_WARNING    EEEPC_LOG
  46 #define EEEPC_NOTICE    KERN_NOTICE     EEEPC_LOG
  47 #define EEEPC_INFO      KERN_INFO       EEEPC_LOG
  48
  49 /*
  50  * Definitions for Asus EeePC
  51  */
  52 #define NOTIFY_WLAN_ON  0x10
  53 #define NOTIFY_BRN_MIN  0x20
  54 #define NOTIFY_BRN_MAX  0x2f
  55
  56 enum {
  57         DISABLE_ASL_WLAN = 0x0001,
  58         DISABLE_ASL_BLUETOOTH = 0x0002,
  59         DISABLE_ASL_IRDA = 0x0004,
  60         DISABLE_ASL_CAMERA = 0x0008,
  61         DISABLE_ASL_TV = 0x0010,
  62         DISABLE_ASL_GPS = 0x0020,
  63         DISABLE_ASL_DISPLAYSWITCH = 0x0040,
  64         DISABLE_ASL_MODEM = 0x0080,
  65         DISABLE_ASL_CARDREADER = 0x0100
  66 };
  67
  68 enum {
  69         CM_ASL_WLAN = 0,
  70         CM_ASL_BLUETOOTH,
  71         CM_ASL_IRDA,
  72         CM_ASL_1394,
  73         CM_ASL_CAMERA,
  74         CM_ASL_TV,
  75         CM_ASL_GPS,
  76         CM_ASL_DVDROM,
  77         CM_ASL_DISPLAYSWITCH,
  78         CM_ASL_PANELBRIGHT,
  79         CM_ASL_BIOSFLASH,
  80         CM_ASL_ACPIFLASH,
  81         CM_ASL_CPUFV,
  82         CM_ASL_CPUTEMPERATURE,
  83         CM_ASL_FANCPU,
  84         CM_ASL_FANCHASSIS,
  85         CM_ASL_USBPORT1,
  86         CM_ASL_USBPORT2,
  87         CM_ASL_USBPORT3,
  88         CM_ASL_MODEM,
  89         CM_ASL_CARDREADER,
  90         CM_ASL_LID
  91 };
  92
  93 static const char *cm_getv[] = {
  94         "WLDG", "BTHG", NULL, NULL,
  95         "CAMG", NULL, NULL, NULL,
  96         NULL, "PBLG", NULL, NULL,
  97         "CFVG", NULL, NULL, NULL,
  98         "USBG", NULL, NULL, "MODG",
  99         "CRDG", "LIDG"
 100 };
 101
 102 static const char *cm_setv[] = {
 103         "WLDS", "BTHS", NULL, NULL,
 104         "CAMS", NULL, NULL, NULL,
 105         "SDSP", "PBLS", "HDPS", NULL,
 106         "CFVS", NULL, NULL, NULL,
 107         "USBG", NULL, NULL, "MODS",
 108         "CRDS", NULL
 109 };
 110
 111 #define EEEPC_EC        "\\_SB.PCI0.SBRG.EC0."
 112
 113 #define EEEPC_EC_FAN_PWM        EEEPC_EC "SC02" /* Fan PWM duty cycle (%) */
 114 #define EEEPC_EC_SC02           0x63
 115 #define EEEPC_EC_FAN_HRPM       EEEPC_EC "SC05" /* High byte, fan speed (RPM) */
 116 #define EEEPC_EC_FAN_LRPM       EEEPC_EC "SC06" /* Low byte, fan speed (RPM) */
 117 #define EEEPC_EC_FAN_CTRL       EEEPC_EC "SFB3" /* Byte containing SF25  */
 118 #define EEEPC_EC_SFB3           0xD3
 119
 120 /*
 121  * This is the main structure, we can use it to store useful information
 122  * about the hotk device
 123  */
 124 struct eeepc_hotk {
 125         struct acpi_device *device;     /* the device we are in */
 126         acpi_handle handle;             /* the handle of the hotk device */
 127         u32 cm_supported;               /* the control methods supported
 128                                            by this BIOS */
 129         uint init_flag;                 /* Init flags */
 130         u16 event_count[128];           /* count for each event */
 131         struct input_dev *inputdev;
 132         u16 *keycode_map;
 133         struct rfkill *eeepc_wlan_rfkill;
 134         struct rfkill *eeepc_bluetooth_rfkill;
 135 };
 136
 137 /* The actual device the driver binds to */
 138 static struct eeepc_hotk *ehotk;
 139
 140 /* Platform device/driver */
 141 static struct platform_driver platform_driver = {
 142         .driver = {
 143                 .name = EEEPC_HOTK_FILE,
 144                 .owner = THIS_MODULE,
 145         }
 146 };
 147
 148 static struct platform_device *platform_device;
 149
 150 struct key_entry {
 151         char type;
 152         u8 code;
 153         u16 keycode;
 154 };
 155
 156 enum { KE_KEY, KE_END };
 157
 158 static struct key_entry eeepc_keymap[] = {
 159         /* Sleep already handled via generic ACPI code */
 160         {KE_KEY, 0x10, KEY_WLAN },
 161         {KE_KEY, 0x12, KEY_PROG1 },
 162         {KE_KEY, 0x13, KEY_MUTE },
 163         {KE_KEY, 0x14, KEY_VOLUMEDOWN },
 164         {KE_KEY, 0x15, KEY_VOLUMEUP },
 165         {KE_KEY, 0x1a, KEY_COFFEE },
 166         {KE_KEY, 0x1b, KEY_ZOOM },
 167         {KE_KEY, 0x1c, KEY_PROG2 },
 168         {KE_KEY, 0x1d, KEY_PROG3 },
 169         {KE_KEY, 0x30, KEY_SWITCHVIDEOMODE },
 170         {KE_KEY, 0x31, KEY_SWITCHVIDEOMODE },
 171         {KE_KEY, 0x32, KEY_SWITCHVIDEOMODE },
 172         {KE_END, 0},
 173 };
 174
 175 /*
 176  * The hotkey driver declaration
 177  */
 178 static int eeepc_hotk_add(struct acpi_device *device);
 179 static int eeepc_hotk_remove(struct acpi_device *device, int type);
 180
 181 static const struct acpi_device_id eeepc_device_ids[] = {
 182         {EEEPC_HOTK_HID, 0},
 183         {"", 0},
 184 };
 185 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
 186
 187 static struct acpi_driver eeepc_hotk_driver = {
 188         .name = EEEPC_HOTK_NAME,
 189         .class = EEEPC_HOTK_CLASS,
 190         .ids = eeepc_device_ids,
 191         .ops = {
 192                 .add = eeepc_hotk_add,
 193                 .remove = eeepc_hotk_remove,
 194         },
 195 };
 196
 197 /* The backlight device /sys/class/backlight */
 198 static struct backlight_device *eeepc_backlight_device;
 199
 200 /* The hwmon device */
 201 static struct device *eeepc_hwmon_device;
 202
 203 /*
 204  * The backlight class declaration
 205  */
 206 static int read_brightness(struct backlight_device *bd);
 207 static int update_bl_status(struct backlight_device *bd);
 208 static struct backlight_ops eeepcbl_ops = {
 209         .get_brightness = read_brightness,
 210         .update_status = update_bl_status,
 211 };
 212
 213 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
 214 MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
 215 MODULE_LICENSE("GPL");
 216
 217 /*
 218  * ACPI Helpers
 219  */
 220 static int write_acpi_int(acpi_handle handle, const char *method, int val,
 221                           struct acpi_buffer *output)
 222 {
 223         struct acpi_object_list params;
 224         union acpi_object in_obj;
 225         acpi_status status;
 226
 227         params.count = 1;
 228         params.pointer = &in_obj;
 229         in_obj.type = ACPI_TYPE_INTEGER;
 230         in_obj.integer.value = val;
 231
 232         status = acpi_evaluate_object(handle, (char *)method, &params, output);
 233         return (status == AE_OK ? 0 : -1);
 234 }
 235
 236 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 237 {
 238         acpi_status status;
 239         unsigned long long result;
 240
 241         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 242         if (ACPI_FAILURE(status)) {
 243                 *val = -1;
 244                 return -1;
 245         } else {
 246                 *val = result;
 247                 return 0;
 248         }
 249 }
 250
 251 static int set_acpi(int cm, int value)
 252 {
 253         if (ehotk->cm_supported & (0x1 << cm)) {
 254                 const char *method = cm_setv[cm];
 255                 if (method == NULL)
 256                         return -ENODEV;
 257                 if (write_acpi_int(ehotk->handle, method, value, NULL))
 258                         printk(EEEPC_WARNING "Error writing %s\n", method);
 259         }
 260         return 0;
 261 }
 262
 263 static int get_acpi(int cm)
 264 {
 265         int value = -1;
 266         if ((ehotk->cm_supported & (0x1 << cm))) {
 267                 const char *method = cm_getv[cm];
 268                 if (method == NULL)
 269                         return -ENODEV;
 270                 if (read_acpi_int(ehotk->handle, method, &value))
 271                         printk(EEEPC_WARNING "Error reading %s\n", method);
 272         }
 273         return value;
 274 }
 275
 276 /*
 277  * Backlight
 278  */
 279 static int read_brightness(struct backlight_device *bd)
 280 {
 281         return get_acpi(CM_ASL_PANELBRIGHT);
 282 }
 283
 284 static int set_brightness(struct backlight_device *bd, int value)
 285 {
 286         value = max(0, min(15, value));
 287         return set_acpi(CM_ASL_PANELBRIGHT, value);
 288 }
 289
 290 static int update_bl_status(struct backlight_device *bd)
 291 {
 292         return set_brightness(bd, bd->props.brightness);
 293 }
 294
 295 /*
 296  * Rfkill helpers
 297  */
 298
 299 static int eeepc_wlan_rfkill_set(void *data, enum rfkill_state state)
 300 {
 301         if (state == RFKILL_STATE_SOFT_BLOCKED)
 302                 return set_acpi(CM_ASL_WLAN, 0);
 303         else
 304                 return set_acpi(CM_ASL_WLAN, 1);
 305 }
 306
 307 static int eeepc_wlan_rfkill_state(void *data, enum rfkill_state *state)
 308 {
 309         if (get_acpi(CM_ASL_WLAN) == 1)
 310                 *state = RFKILL_STATE_UNBLOCKED;
 311         else
 312                 *state = RFKILL_STATE_SOFT_BLOCKED;
 313         return 0;
 314 }
 315
 316 static int eeepc_bluetooth_rfkill_set(void *data, enum rfkill_state state)
 317 {
 318         if (state == RFKILL_STATE_SOFT_BLOCKED)
 319                 return set_acpi(CM_ASL_BLUETOOTH, 0);
 320         else
 321                 return set_acpi(CM_ASL_BLUETOOTH, 1);
 322 }
 323
 324 static int eeepc_bluetooth_rfkill_state(void *data, enum rfkill_state *state)
 325 {
 326         if (get_acpi(CM_ASL_BLUETOOTH) == 1)
 327                 *state = RFKILL_STATE_UNBLOCKED;
 328         else
 329                 *state = RFKILL_STATE_SOFT_BLOCKED;
 330         return 0;
 331 }
 332
 333 /*
 334  * Sys helpers
 335  */
 336 static int parse_arg(const char *buf, unsigned long count, int *val)
 337 {
 338         if (!count)
 339                 return 0;
 340         if (sscanf(buf, "%i", val) != 1)
 341                 return -EINVAL;
 342         return count;
 343 }
 344
 345 static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
 346 {
 347         int rv, value;
 348
 349         rv = parse_arg(buf, count, &value);
 350         if (rv > 0)
 351                 set_acpi(cm, value);
 352         return rv;
 353 }
 354
 355 static ssize_t show_sys_acpi(int cm, char *buf)
 356 {
 357         return sprintf(buf, "%d\n", get_acpi(cm));
 358 }
 359
 360 #define EEEPC_CREATE_DEVICE_ATTR(_name, _cm)                            \
 361         static ssize_t show_##_name(struct device *dev,                 \
 362                                     struct device_attribute *attr,      \
 363                                     char *buf)                          \
 364         {                                                               \
 365                 return show_sys_acpi(_cm, buf);                         \
 366         }                                                               \
 367         static ssize_t store_##_name(struct device *dev,                \
 368                                      struct device_attribute *attr,     \
 369                                      const char *buf, size_t count)     \
 370         {                                                               \
 371                 return store_sys_acpi(_cm, buf, count);                 \
 372         }                                                               \
 373         static struct device_attribute dev_attr_##_name = {             \
 374                 .attr = {                                               \
 375                         .name = __stringify(_name),                     \
 376                         .mode = 0644 },                                 \
 377                 .show   = show_##_name,                                 \
 378                 .store  = store_##_name,                                \
 379         }
 380
 381 EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
 382 EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
 383 EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
 384
 385 static struct attribute *platform_attributes[] = {
 386         &dev_attr_camera.attr,
 387         &dev_attr_cardr.attr,
 388         &dev_attr_disp.attr,
 389         NULL
 390 };
 391
 392 static struct attribute_group platform_attribute_group = {
 393         .attrs = platform_attributes
 394 };
 395
 396 /*
 397  * Hotkey functions
 398  */
 399 static struct key_entry *eepc_get_entry_by_scancode(int code)
 400 {
 401         struct key_entry *key;
 402
 403         for (key = eeepc_keymap; key->type != KE_END; key++)
 404                 if (code == key->code)
 405                         return key;
 406
 407         return NULL;
 408 }
 409
 410 static struct key_entry *eepc_get_entry_by_keycode(int code)
 411 {
 412         struct key_entry *key;
 413
 414         for (key = eeepc_keymap; key->type != KE_END; key++)
 415                 if (code == key->keycode && key->type == KE_KEY)
 416                         return key;
 417
 418         return NULL;
 419 }
 420
 421 static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
 422 {
 423         struct key_entry *key = eepc_get_entry_by_scancode(scancode);
 424
 425         if (key && key->type == KE_KEY) {
 426                 *keycode = key->keycode;
 427                 return 0;
 428         }
 429
 430         return -EINVAL;
 431 }
 432
 433 static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
 434 {
 435         struct key_entry *key;
 436         int old_keycode;
 437
 438         if (keycode < 0 || keycode > KEY_MAX)
 439                 return -EINVAL;
 440
 441         key = eepc_get_entry_by_scancode(scancode);
 442         if (key && key->type == KE_KEY) {
 443                 old_keycode = key->keycode;
 444                 key->keycode = keycode;
 445                 set_bit(keycode, dev->keybit);
 446                 if (!eepc_get_entry_by_keycode(old_keycode))
 447                         clear_bit(old_keycode, dev->keybit);
 448                 return 0;
 449         }
 450
 451         return -EINVAL;
 452 }
 453
 454 static int eeepc_hotk_check(void)
 455 {
 456         const struct key_entry *key;
 457         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 458         int result;
 459
 460         result = acpi_bus_get_status(ehotk->device);
 461         if (result)
 462                 return result;
 463         if (ehotk->device->status.present) {
 464                 if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
 465                                     &buffer)) {
 466                         printk(EEEPC_ERR "Hotkey initialization failed\n");
 467                         return -ENODEV;
 468                 } else {
 469                         printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
 470                                ehotk->init_flag);
 471                 }
 472                 /* get control methods supported */
 473                 if (read_acpi_int(ehotk->handle, "CMSG"
 474                                    , &ehotk->cm_supported)) {
 475                         printk(EEEPC_ERR
 476                                "Get control methods supported failed\n");
 477                         return -ENODEV;
 478                 } else {
 479                         printk(EEEPC_INFO
 480                                "Get control methods supported: 0x%x\n",
 481                                ehotk->cm_supported);
 482                 }
 483                 ehotk->inputdev = input_allocate_device();
 484                 if (!ehotk->inputdev) {
 485                         printk(EEEPC_INFO "Unable to allocate input device\n");
 486                         return 0;
 487                 }
 488                 ehotk->inputdev->name = "Asus EeePC extra buttons";
 489                 ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
 490                 ehotk->inputdev->id.bustype = BUS_HOST;
 491                 ehotk->inputdev->getkeycode = eeepc_getkeycode;
 492                 ehotk->inputdev->setkeycode = eeepc_setkeycode;
 493
 494                 for (key = eeepc_keymap; key->type != KE_END; key++) {
 495                         switch (key->type) {
 496                         case KE_KEY:
 497                                 set_bit(EV_KEY, ehotk->inputdev->evbit);
 498                                 set_bit(key->keycode, ehotk->inputdev->keybit);
 499                                 break;
 500                         }
 501                 }
 502                 result = input_register_device(ehotk->inputdev);
 503                 if (result) {
 504                         printk(EEEPC_INFO "Unable to register input device\n");
 505                         input_free_device(ehotk->inputdev);
 506                         return 0;
 507                 }
 508         } else {
 509                 printk(EEEPC_ERR "Hotkey device not present, aborting\n");
 510                 return -EINVAL;
 511         }
 512         return 0;
 513 }
 514
 515 static void notify_brn(void)
 516 {
 517         struct backlight_device *bd = eeepc_backlight_device;
 518         if (bd)
 519                 bd->props.brightness = read_brightness(bd);
 520 }
 521
 522 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 523 {
 524         struct pci_dev *dev;
 525         struct pci_bus *bus = pci_find_bus(0, 1);
 526
 527         if (event != ACPI_NOTIFY_BUS_CHECK)
 528                 return;
 529
 530         if (!bus) {
 531                 printk(EEEPC_WARNING "Unable to find PCI bus 1?\n");
 532                 return;
 533         }
 534
 535         if (get_acpi(CM_ASL_WLAN) == 1) {
 536                 dev = pci_get_slot(bus, 0);
 537                 if (dev) {
 538                         /* Device already present */
 539                         pci_dev_put(dev);
 540                         return;
 541                 }
 542                 dev = pci_scan_single_device(bus, 0);
 543                 if (dev) {
 544                         pci_bus_assign_resources(bus);
 545                         if (pci_bus_add_device(dev))
 546                                 printk(EEEPC_ERR "Unable to hotplug wifi\n");
 547                 }
 548         } else {
 549                 dev = pci_get_slot(bus, 0);
 550                 if (dev) {
 551                         pci_remove_bus_device(dev);
 552                         pci_dev_put(dev);
 553                 }
 554         }
 555 }
 556
 557 static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
 558 {
 559         static struct key_entry *key;
 560         if (!ehotk)
 561                 return;
 562         if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
 563                 notify_brn();
 564         acpi_bus_generate_netlink_event(ehotk->device->pnp.device_class,
 565                                         dev_name(&ehotk->device->dev), event,
 566                                         ehotk->event_count[event % 128]++);
 567         if (ehotk->inputdev) {
 568                 key = eepc_get_entry_by_scancode(event);
 569                 if (key) {
 570                         switch (key->type) {
 571                         case KE_KEY:
 572                                 input_report_key(ehotk->inputdev, key->keycode,
 573                                                  1);
 574                                 input_sync(ehotk->inputdev);
 575                                 input_report_key(ehotk->inputdev, key->keycode,
 576                                                  0);
 577                                 input_sync(ehotk->inputdev);
 578                                 break;
 579                         }
 580                 }
 581         }
 582 }
 583
 584 static int eeepc_register_rfkill_notifier(char *node)
 585 {
 586         acpi_status status = AE_OK;
 587         acpi_handle handle;
 588
 589         status = acpi_get_handle(NULL, node, &handle);
 590
 591         if (ACPI_SUCCESS(status)) {
 592                 status = acpi_install_notify_handler(handle,
 593                                                      ACPI_SYSTEM_NOTIFY,
 594                                                      eeepc_rfkill_notify,
 595                                                      NULL);
 596                 if (ACPI_FAILURE(status))
 597                         printk(EEEPC_WARNING
 598                                "Failed to register notify on %s\n", node);
 599         } else
 600                 return -ENODEV;
 601
 602         return 0;
 603 }
 604
 605 static void eeepc_unregister_rfkill_notifier(char *node)
 606 {
 607         acpi_status status = AE_OK;
 608         acpi_handle handle;
 609
 610         status = acpi_get_handle(NULL, node, &handle);
 611
 612         if (ACPI_SUCCESS(status)) {
 613                 status = acpi_remove_notify_handler(handle,
 614                                                      ACPI_SYSTEM_NOTIFY,
 615                                                      eeepc_rfkill_notify);
 616                 if (ACPI_FAILURE(status))
 617                         printk(EEEPC_ERR
 618                                "Error removing rfkill notify handler %s\n",
 619                                 node);
 620         }
 621 }
 622
 623 static int eeepc_hotk_add(struct acpi_device *device)
 624 {
 625         acpi_status status = AE_OK;
 626         int result;
 627
 628         if (!device)
 629                  return -EINVAL;
 630         printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
 631         ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
 632         if (!ehotk)
 633                 return -ENOMEM;
 634         ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
 635         ehotk->handle = device->handle;
 636         strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
 637         strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
 638         device->driver_data = ehotk;
 639         ehotk->device = device;
 640         result = eeepc_hotk_check();
 641         if (result)
 642                 goto ehotk_fail;
 643         status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 644                                              eeepc_hotk_notify, ehotk);
 645         if (ACPI_FAILURE(status))
 646                 printk(EEEPC_ERR "Error installing notify handler\n");
 647
 648         if (get_acpi(CM_ASL_WLAN) != -1) {
 649                 ehotk->eeepc_wlan_rfkill = rfkill_allocate(&device->dev,
 650                                                            RFKILL_TYPE_WLAN);
 651
 652                 if (!ehotk->eeepc_wlan_rfkill)
 653                         goto wlan_fail;
 654
 655                 ehotk->eeepc_wlan_rfkill->name = "eeepc-wlan";
 656                 ehotk->eeepc_wlan_rfkill->toggle_radio = eeepc_wlan_rfkill_set;
 657                 ehotk->eeepc_wlan_rfkill->get_state = eeepc_wlan_rfkill_state;
 658                 if (get_acpi(CM_ASL_WLAN) == 1) {
 659                         ehotk->eeepc_wlan_rfkill->state =
 660                                 RFKILL_STATE_UNBLOCKED;
 661                         rfkill_set_default(RFKILL_TYPE_WLAN,
 662                                            RFKILL_STATE_UNBLOCKED);
 663                 } else {
 664                         ehotk->eeepc_wlan_rfkill->state =
 665                                 RFKILL_STATE_SOFT_BLOCKED;
 666                         rfkill_set_default(RFKILL_TYPE_WLAN,
 667                                            RFKILL_STATE_SOFT_BLOCKED);
 668                 }
 669                 result = rfkill_register(ehotk->eeepc_wlan_rfkill);
 670                 if (result)
 671                         goto wlan_fail;
 672         }
 673
 674         if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
 675                 ehotk->eeepc_bluetooth_rfkill =
 676                         rfkill_allocate(&device->dev, RFKILL_TYPE_BLUETOOTH);
 677
 678                 if (!ehotk->eeepc_bluetooth_rfkill)
 679                         goto bluetooth_fail;
 680
 681                 ehotk->eeepc_bluetooth_rfkill->name = "eeepc-bluetooth";
 682                 ehotk->eeepc_bluetooth_rfkill->toggle_radio =
 683                         eeepc_bluetooth_rfkill_set;
 684                 ehotk->eeepc_bluetooth_rfkill->get_state =
 685                         eeepc_bluetooth_rfkill_state;
 686                 if (get_acpi(CM_ASL_BLUETOOTH) == 1) {
 687                         ehotk->eeepc_bluetooth_rfkill->state =
 688                                 RFKILL_STATE_UNBLOCKED;
 689                         rfkill_set_default(RFKILL_TYPE_BLUETOOTH,
 690                                            RFKILL_STATE_UNBLOCKED);
 691                 } else {
 692                         ehotk->eeepc_bluetooth_rfkill->state =
 693                                 RFKILL_STATE_SOFT_BLOCKED;
 694                         rfkill_set_default(RFKILL_TYPE_BLUETOOTH,
 695                                            RFKILL_STATE_SOFT_BLOCKED);
 696                 }
 697
 698                 result = rfkill_register(ehotk->eeepc_bluetooth_rfkill);
 699                 if (result)
 700                         goto bluetooth_fail;
 701         }
 702
 703         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6");
 704         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
 705
 706         return 0;
 707
 708  bluetooth_fail:
 709         if (ehotk->eeepc_bluetooth_rfkill)
 710                 rfkill_free(ehotk->eeepc_bluetooth_rfkill);
 711         rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 712         ehotk->eeepc_wlan_rfkill = NULL;
 713  wlan_fail:
 714         if (ehotk->eeepc_wlan_rfkill)
 715                 rfkill_free(ehotk->eeepc_wlan_rfkill);
 716  ehotk_fail:
 717         kfree(ehotk);
 718         ehotk = NULL;
 719
 720         return result;
 721 }
 722
 723 static int eeepc_hotk_remove(struct acpi_device *device, int type)
 724 {
 725         acpi_status status = 0;
 726
 727         if (!device || !acpi_driver_data(device))
 728                  return -EINVAL;
 729         status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 730                                             eeepc_hotk_notify);
 731         if (ACPI_FAILURE(status))
 732                 printk(EEEPC_ERR "Error removing notify handler\n");
 733
 734         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 735         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 736
 737         kfree(ehotk);
 738         return 0;
 739 }
 740
 741 /*
 742  * Hwmon
 743  */
 744 static int eeepc_get_fan_pwm(void)
 745 {
 746         int value = 0;
 747
 748         read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
 749         value = value * 255 / 100;
 750         return (value);
 751 }
 752
 753 static void eeepc_set_fan_pwm(int value)
 754 {
 755         value = SENSORS_LIMIT(value, 0, 255);
 756         value = value * 100 / 255;
 757         ec_write(EEEPC_EC_SC02, value);
 758 }
 759
 760 static int eeepc_get_fan_rpm(void)
 761 {
 762         int high = 0;
 763         int low = 0;
 764
 765         read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
 766         read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
 767         return (high << 8 | low);
 768 }
 769
 770 static int eeepc_get_fan_ctrl(void)
 771 {
 772         int value = 0;
 773
 774         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 775         return ((value & 0x02 ? 1 : 0));
 776 }
 777
 778 static void eeepc_set_fan_ctrl(int manual)
 779 {
 780         int value = 0;
 781
 782         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 783         if (manual)
 784                 value |= 0x02;
 785         else
 786                 value &= ~0x02;
 787         ec_write(EEEPC_EC_SFB3, value);
 788 }
 789
 790 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 791 {
 792         int rv, value;
 793
 794         rv = parse_arg(buf, count, &value);
 795         if (rv > 0)
 796                 set(value);
 797         return rv;
 798 }
 799
 800 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
 801 {
 802         return sprintf(buf, "%d\n", get());
 803 }
 804
 805 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get)              \
 806         static ssize_t show_##_name(struct device *dev,                 \
 807                                     struct device_attribute *attr,      \
 808                                     char *buf)                          \
 809         {                                                               \
 810                 return show_sys_hwmon(_set, buf);                       \
 811         }                                                               \
 812         static ssize_t store_##_name(struct device *dev,                \
 813                                      struct device_attribute *attr,     \
 814                                      const char *buf, size_t count)     \
 815         {                                                               \
 816                 return store_sys_hwmon(_get, buf, count);               \
 817         }                                                               \
 818         static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
 819
 820 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
 821 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
 822                          eeepc_get_fan_pwm, eeepc_set_fan_pwm);
 823 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 824                          eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
 825
 826 static ssize_t
 827 show_name(struct device *dev, struct device_attribute *attr, char *buf)
 828 {
 829         return sprintf(buf, "eeepc\n");
 830 }
 831 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
 832
 833 static struct attribute *hwmon_attributes[] = {
 834         &sensor_dev_attr_pwm1.dev_attr.attr,
 835         &sensor_dev_attr_fan1_input.dev_attr.attr,
 836         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 837         &sensor_dev_attr_name.dev_attr.attr,
 838         NULL
 839 };
 840
 841 static struct attribute_group hwmon_attribute_group = {
 842         .attrs = hwmon_attributes
 843 };
 844
 845 /*
 846  * exit/init
 847  */
 848 static void eeepc_backlight_exit(void)
 849 {
 850         if (eeepc_backlight_device)
 851                 backlight_device_unregister(eeepc_backlight_device);
 852         eeepc_backlight_device = NULL;
 853 }
 854
 855 static void eeepc_rfkill_exit(void)
 856 {
 857         if (ehotk->eeepc_wlan_rfkill)
 858                 rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 859         if (ehotk->eeepc_bluetooth_rfkill)
 860                 rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
 861 }
 862
 863 static void eeepc_input_exit(void)
 864 {
 865         if (ehotk->inputdev)
 866                 input_unregister_device(ehotk->inputdev);
 867 }
 868
 869 static void eeepc_hwmon_exit(void)
 870 {
 871         struct device *hwmon;
 872
 873         hwmon = eeepc_hwmon_device;
 874         if (!hwmon)
 875                 return ;
 876         sysfs_remove_group(&hwmon->kobj,
 877                            &hwmon_attribute_group);
 878         hwmon_device_unregister(hwmon);
 879         eeepc_hwmon_device = NULL;
 880 }
 881
 882 static void __exit eeepc_laptop_exit(void)
 883 {
 884         eeepc_backlight_exit();
 885         eeepc_rfkill_exit();
 886         eeepc_input_exit();
 887         eeepc_hwmon_exit();
 888         acpi_bus_unregister_driver(&eeepc_hotk_driver);
 889         sysfs_remove_group(&platform_device->dev.kobj,
 890                            &platform_attribute_group);
 891         platform_device_unregister(platform_device);
 892         platform_driver_unregister(&platform_driver);
 893 }
 894
 895 static int eeepc_backlight_init(struct device *dev)
 896 {
 897         struct backlight_device *bd;
 898
 899         bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
 900                                        NULL, &eeepcbl_ops);
 901         if (IS_ERR(bd)) {
 902                 printk(EEEPC_ERR
 903                        "Could not register eeepc backlight device\n");
 904                 eeepc_backlight_device = NULL;
 905                 return PTR_ERR(bd);
 906         }
 907         eeepc_backlight_device = bd;
 908         bd->props.max_brightness = 15;
 909         bd->props.brightness = read_brightness(NULL);
 910         bd->props.power = FB_BLANK_UNBLANK;
 911         backlight_update_status(bd);
 912         return 0;
 913 }
 914
 915 static int eeepc_hwmon_init(struct device *dev)
 916 {
 917         struct device *hwmon;
 918         int result;
 919
 920         hwmon = hwmon_device_register(dev);
 921         if (IS_ERR(hwmon)) {
 922                 printk(EEEPC_ERR
 923                        "Could not register eeepc hwmon device\n");
 924                 eeepc_hwmon_device = NULL;
 925                 return PTR_ERR(hwmon);
 926         }
 927         eeepc_hwmon_device = hwmon;
 928         result = sysfs_create_group(&hwmon->kobj,
 929                                     &hwmon_attribute_group);
 930         if (result)
 931                 eeepc_hwmon_exit();
 932         return result;
 933 }
 934
 935 static int __init eeepc_laptop_init(void)
 936 {
 937         struct device *dev;
 938         int result;
 939
 940         if (acpi_disabled)
 941                 return -ENODEV;
 942         result = acpi_bus_register_driver(&eeepc_hotk_driver);
 943         if (result < 0)
 944                 return result;
 945         if (!ehotk) {
 946                 acpi_bus_unregister_driver(&eeepc_hotk_driver);
 947                 return -ENODEV;
 948         }
 949         dev = acpi_get_physical_device(ehotk->device->handle);
 950
 951         if (!acpi_video_backlight_support()) {
 952                 result = eeepc_backlight_init(dev);
 953                 if (result)
 954                         goto fail_backlight;
 955         } else
 956                 printk(EEEPC_INFO "Backlight controlled by ACPI video "
 957                        "driver\n");
 958
 959         result = eeepc_hwmon_init(dev);
 960         if (result)
 961                 goto fail_hwmon;
 962         /* Register platform stuff */
 963         result = platform_driver_register(&platform_driver);
 964         if (result)
 965                 goto fail_platform_driver;
 966         platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
 967         if (!platform_device) {
 968                 result = -ENOMEM;
 969                 goto fail_platform_device1;
 970         }
 971         result = platform_device_add(platform_device);
 972         if (result)
 973                 goto fail_platform_device2;
 974         result = sysfs_create_group(&platform_device->dev.kobj,
 975                                     &platform_attribute_group);
 976         if (result)
 977                 goto fail_sysfs;
 978         return 0;
 979 fail_sysfs:
 980         platform_device_del(platform_device);
 981 fail_platform_device2:
 982         platform_device_put(platform_device);
 983 fail_platform_device1:
 984         platform_driver_unregister(&platform_driver);
 985 fail_platform_driver:
 986         eeepc_hwmon_exit();
 987 fail_hwmon:
 988         eeepc_backlight_exit();
 989 fail_backlight:
 990         eeepc_input_exit();
 991         eeepc_rfkill_exit();
 992         return result;
 993 }
 994
 995 module_init(eeepc_laptop_init);
 996 module_exit(eeepc_laptop_exit);