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, 0x11, KEY_WLAN },
 162         {KE_KEY, 0x12, KEY_PROG1 },
 163         {KE_KEY, 0x13, KEY_MUTE },
 164         {KE_KEY, 0x14, KEY_VOLUMEDOWN },
 165         {KE_KEY, 0x15, KEY_VOLUMEUP },
 166         {KE_KEY, 0x1a, KEY_COFFEE },
 167         {KE_KEY, 0x1b, KEY_ZOOM },
 168         {KE_KEY, 0x1c, KEY_PROG2 },
 169         {KE_KEY, 0x1d, KEY_PROG3 },
 170         {KE_KEY, NOTIFY_BRN_MIN,     KEY_BRIGHTNESSDOWN },
 171         {KE_KEY, NOTIFY_BRN_MIN + 2, KEY_BRIGHTNESSUP },
 172         {KE_KEY, 0x30, KEY_SWITCHVIDEOMODE },
 173         {KE_KEY, 0x31, KEY_SWITCHVIDEOMODE },
 174         {KE_KEY, 0x32, KEY_SWITCHVIDEOMODE },
 175         {KE_END, 0},
 176 };
 177
 178 /*
 179  * The hotkey driver declaration
 180  */
 181 static int eeepc_hotk_add(struct acpi_device *device);
 182 static int eeepc_hotk_remove(struct acpi_device *device, int type);
 183 static int eeepc_hotk_resume(struct acpi_device *device);
 184 static void eeepc_hotk_notify(struct acpi_device *device, u32 event);
 185
 186 static const struct acpi_device_id eeepc_device_ids[] = {
 187         {EEEPC_HOTK_HID, 0},
 188         {"", 0},
 189 };
 190 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
 191
 192 static struct acpi_driver eeepc_hotk_driver = {
 193         .name = EEEPC_HOTK_NAME,
 194         .class = EEEPC_HOTK_CLASS,
 195         .ids = eeepc_device_ids,
 196         .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
 197         .ops = {
 198                 .add = eeepc_hotk_add,
 199                 .remove = eeepc_hotk_remove,
 200                 .resume = eeepc_hotk_resume,
 201                 .notify = eeepc_hotk_notify,
 202         },
 203 };
 204
 205 /* The backlight device /sys/class/backlight */
 206 static struct backlight_device *eeepc_backlight_device;
 207
 208 /* The hwmon device */
 209 static struct device *eeepc_hwmon_device;
 210
 211 /*
 212  * The backlight class declaration
 213  */
 214 static int read_brightness(struct backlight_device *bd);
 215 static int update_bl_status(struct backlight_device *bd);
 216 static struct backlight_ops eeepcbl_ops = {
 217         .get_brightness = read_brightness,
 218         .update_status = update_bl_status,
 219 };
 220
 221 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
 222 MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
 223 MODULE_LICENSE("GPL");
 224
 225 /*
 226  * ACPI Helpers
 227  */
 228 static int write_acpi_int(acpi_handle handle, const char *method, int val,
 229                           struct acpi_buffer *output)
 230 {
 231         struct acpi_object_list params;
 232         union acpi_object in_obj;
 233         acpi_status status;
 234
 235         params.count = 1;
 236         params.pointer = &in_obj;
 237         in_obj.type = ACPI_TYPE_INTEGER;
 238         in_obj.integer.value = val;
 239
 240         status = acpi_evaluate_object(handle, (char *)method, &params, output);
 241         return (status == AE_OK ? 0 : -1);
 242 }
 243
 244 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 245 {
 246         acpi_status status;
 247         unsigned long long result;
 248
 249         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 250         if (ACPI_FAILURE(status)) {
 251                 *val = -1;
 252                 return -1;
 253         } else {
 254                 *val = result;
 255                 return 0;
 256         }
 257 }
 258
 259 static int set_acpi(int cm, int value)
 260 {
 261         if (ehotk->cm_supported & (0x1 << cm)) {
 262                 const char *method = cm_setv[cm];
 263                 if (method == NULL)
 264                         return -ENODEV;
 265                 if (write_acpi_int(ehotk->handle, method, value, NULL))
 266                         printk(EEEPC_WARNING "Error writing %s\n", method);
 267         }
 268         return 0;
 269 }
 270
 271 static int get_acpi(int cm)
 272 {
 273         int value = -1;
 274         if ((ehotk->cm_supported & (0x1 << cm))) {
 275                 const char *method = cm_getv[cm];
 276                 if (method == NULL)
 277                         return -ENODEV;
 278                 if (read_acpi_int(ehotk->handle, method, &value))
 279                         printk(EEEPC_WARNING "Error reading %s\n", method);
 280         }
 281         return value;
 282 }
 283
 284 /*
 285  * Backlight
 286  */
 287 static int read_brightness(struct backlight_device *bd)
 288 {
 289         return get_acpi(CM_ASL_PANELBRIGHT);
 290 }
 291
 292 static int set_brightness(struct backlight_device *bd, int value)
 293 {
 294         value = max(0, min(15, value));
 295         return set_acpi(CM_ASL_PANELBRIGHT, value);
 296 }
 297
 298 static int update_bl_status(struct backlight_device *bd)
 299 {
 300         return set_brightness(bd, bd->props.brightness);
 301 }
 302
 303 /*
 304  * Rfkill helpers
 305  */
 306
 307 static bool eeepc_wlan_rfkill_blocked(void)
 308 {
 309         if (get_acpi(CM_ASL_WLAN) == 1)
 310                 return false;
 311         return true;
 312 }
 313
 314 static int eeepc_rfkill_set(void *data, bool blocked)
 315 {
 316         unsigned long asl = (unsigned long)data;
 317         return set_acpi(asl, !blocked);
 318 }
 319
 320 static const struct rfkill_ops eeepc_rfkill_ops = {
 321         .set_block = eeepc_rfkill_set,
 322 };
 323
 324 static void __init eeepc_enable_camera(void)
 325 {
 326         /*
 327          * If the following call to set_acpi() fails, it's because there's no
 328          * camera so we can ignore the error.
 329          */
 330         set_acpi(CM_ASL_CAMERA, 1);
 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 EEEPC_CREATE_DEVICE_ATTR(cpufv, CM_ASL_CPUFV);
 385
 386 static struct attribute *platform_attributes[] = {
 387         &dev_attr_camera.attr,
 388         &dev_attr_cardr.attr,
 389         &dev_attr_disp.attr,
 390         &dev_attr_cpufv.attr,
 391         NULL
 392 };
 393
 394 static struct attribute_group platform_attribute_group = {
 395         .attrs = platform_attributes
 396 };
 397
 398 /*
 399  * Hotkey functions
 400  */
 401 static struct key_entry *eepc_get_entry_by_scancode(int code)
 402 {
 403         struct key_entry *key;
 404
 405         for (key = eeepc_keymap; key->type != KE_END; key++)
 406                 if (code == key->code)
 407                         return key;
 408
 409         return NULL;
 410 }
 411
 412 static struct key_entry *eepc_get_entry_by_keycode(int code)
 413 {
 414         struct key_entry *key;
 415
 416         for (key = eeepc_keymap; key->type != KE_END; key++)
 417                 if (code == key->keycode && key->type == KE_KEY)
 418                         return key;
 419
 420         return NULL;
 421 }
 422
 423 static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
 424 {
 425         struct key_entry *key = eepc_get_entry_by_scancode(scancode);
 426
 427         if (key && key->type == KE_KEY) {
 428                 *keycode = key->keycode;
 429                 return 0;
 430         }
 431
 432         return -EINVAL;
 433 }
 434
 435 static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
 436 {
 437         struct key_entry *key;
 438         int old_keycode;
 439
 440         if (keycode < 0 || keycode > KEY_MAX)
 441                 return -EINVAL;
 442
 443         key = eepc_get_entry_by_scancode(scancode);
 444         if (key && key->type == KE_KEY) {
 445                 old_keycode = key->keycode;
 446                 key->keycode = keycode;
 447                 set_bit(keycode, dev->keybit);
 448                 if (!eepc_get_entry_by_keycode(old_keycode))
 449                         clear_bit(old_keycode, dev->keybit);
 450                 return 0;
 451         }
 452
 453         return -EINVAL;
 454 }
 455
 456 static int eeepc_hotk_check(void)
 457 {
 458         const struct key_entry *key;
 459         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 460         int result;
 461
 462         result = acpi_bus_get_status(ehotk->device);
 463         if (result)
 464                 return result;
 465         if (ehotk->device->status.present) {
 466                 if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
 467                                     &buffer)) {
 468                         printk(EEEPC_ERR "Hotkey initialization failed\n");
 469                         return -ENODEV;
 470                 } else {
 471                         printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
 472                                ehotk->init_flag);
 473                 }
 474                 /* get control methods supported */
 475                 if (read_acpi_int(ehotk->handle, "CMSG"
 476                                    , &ehotk->cm_supported)) {
 477                         printk(EEEPC_ERR
 478                                "Get control methods supported failed\n");
 479                         return -ENODEV;
 480                 } else {
 481                         printk(EEEPC_INFO
 482                                "Get control methods supported: 0x%x\n",
 483                                ehotk->cm_supported);
 484                 }
 485                 ehotk->inputdev = input_allocate_device();
 486                 if (!ehotk->inputdev) {
 487                         printk(EEEPC_INFO "Unable to allocate input device\n");
 488                         return 0;
 489                 }
 490                 ehotk->inputdev->name = "Asus EeePC extra buttons";
 491                 ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
 492                 ehotk->inputdev->id.bustype = BUS_HOST;
 493                 ehotk->inputdev->getkeycode = eeepc_getkeycode;
 494                 ehotk->inputdev->setkeycode = eeepc_setkeycode;
 495
 496                 for (key = eeepc_keymap; key->type != KE_END; key++) {
 497                         switch (key->type) {
 498                         case KE_KEY:
 499                                 set_bit(EV_KEY, ehotk->inputdev->evbit);
 500                                 set_bit(key->keycode, ehotk->inputdev->keybit);
 501                                 break;
 502                         }
 503                 }
 504                 result = input_register_device(ehotk->inputdev);
 505                 if (result) {
 506                         printk(EEEPC_INFO "Unable to register input device\n");
 507                         input_free_device(ehotk->inputdev);
 508                         return 0;
 509                 }
 510         } else {
 511                 printk(EEEPC_ERR "Hotkey device not present, aborting\n");
 512                 return -EINVAL;
 513         }
 514         return 0;
 515 }
 516
 517 static int notify_brn(void)
 518 {
 519         /* returns the *previous* brightness, or -1 */
 520         struct backlight_device *bd = eeepc_backlight_device;
 521         if (bd) {
 522                 int old = bd->props.brightness;
 523                 bd->props.brightness = read_brightness(bd);
 524                 return old;
 525         }
 526         return -1;
 527 }
 528
 529 static void eeepc_rfkill_hotplug(void)
 530 {
 531         struct pci_dev *dev;
 532         struct pci_bus *bus = pci_find_bus(0, 1);
 533         bool blocked;
 534
 535         if (!bus) {
 536                 printk(EEEPC_WARNING "Unable to find PCI bus 1?\n");
 537                 return;
 538         }
 539
 540         blocked = eeepc_wlan_rfkill_blocked();
 541         if (!blocked) {
 542                 dev = pci_get_slot(bus, 0);
 543                 if (dev) {
 544                         /* Device already present */
 545                         pci_dev_put(dev);
 546                         return;
 547                 }
 548                 dev = pci_scan_single_device(bus, 0);
 549                 if (dev) {
 550                         pci_bus_assign_resources(bus);
 551                         if (pci_bus_add_device(dev))
 552                                 printk(EEEPC_ERR "Unable to hotplug wifi\n");
 553                 }
 554         } else {
 555                 dev = pci_get_slot(bus, 0);
 556                 if (dev) {
 557                         pci_remove_bus_device(dev);
 558                         pci_dev_put(dev);
 559                 }
 560         }
 561
 562         rfkill_set_sw_state(ehotk->eeepc_wlan_rfkill, blocked);
 563 }
 564
 565 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 566 {
 567         if (event != ACPI_NOTIFY_BUS_CHECK)
 568                 return;
 569
 570         eeepc_rfkill_hotplug();
 571 }
 572
 573 static void eeepc_hotk_notify(struct acpi_device *device, u32 event)
 574 {
 575         static struct key_entry *key;
 576         u16 count;
 577         int brn = -ENODEV;
 578
 579         if (!ehotk)
 580                 return;
 581         if (event > ACPI_MAX_SYS_NOTIFY)
 582                 return;
 583         if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
 584                 brn = notify_brn();
 585         count = ehotk->event_count[event % 128]++;
 586         acpi_bus_generate_proc_event(ehotk->device, event, count);
 587         acpi_bus_generate_netlink_event(ehotk->device->pnp.device_class,
 588                                         dev_name(&ehotk->device->dev), event,
 589                                         count);
 590         if (ehotk->inputdev) {
 591                 if (brn != -ENODEV) {
 592                         /* brightness-change events need special
 593                          * handling for conversion to key events
 594                          */
 595                         if (brn < 0)
 596                                 brn = event;
 597                         else
 598                                 brn += NOTIFY_BRN_MIN;
 599                         if (event < brn)
 600                                 event = NOTIFY_BRN_MIN; /* brightness down */
 601                         else if (event > brn)
 602                                 event = NOTIFY_BRN_MIN + 2; /* ... up */
 603                         else
 604                                 event = NOTIFY_BRN_MIN + 1; /* ... unchanged */
 605                 }
 606                 key = eepc_get_entry_by_scancode(event);
 607                 if (key) {
 608                         switch (key->type) {
 609                         case KE_KEY:
 610                                 input_report_key(ehotk->inputdev, key->keycode,
 611                                                  1);
 612                                 input_sync(ehotk->inputdev);
 613                                 input_report_key(ehotk->inputdev, key->keycode,
 614                                                  0);
 615                                 input_sync(ehotk->inputdev);
 616                                 break;
 617                         }
 618                 }
 619         }
 620 }
 621
 622 static int eeepc_register_rfkill_notifier(char *node)
 623 {
 624         acpi_status status = AE_OK;
 625         acpi_handle handle;
 626
 627         status = acpi_get_handle(NULL, node, &handle);
 628
 629         if (ACPI_SUCCESS(status)) {
 630                 status = acpi_install_notify_handler(handle,
 631                                                      ACPI_SYSTEM_NOTIFY,
 632                                                      eeepc_rfkill_notify,
 633                                                      NULL);
 634                 if (ACPI_FAILURE(status))
 635                         printk(EEEPC_WARNING
 636                                "Failed to register notify on %s\n", node);
 637         } else
 638                 return -ENODEV;
 639
 640         return 0;
 641 }
 642
 643 static void eeepc_unregister_rfkill_notifier(char *node)
 644 {
 645         acpi_status status = AE_OK;
 646         acpi_handle handle;
 647
 648         status = acpi_get_handle(NULL, node, &handle);
 649
 650         if (ACPI_SUCCESS(status)) {
 651                 status = acpi_remove_notify_handler(handle,
 652                                                      ACPI_SYSTEM_NOTIFY,
 653                                                      eeepc_rfkill_notify);
 654                 if (ACPI_FAILURE(status))
 655                         printk(EEEPC_ERR
 656                                "Error removing rfkill notify handler %s\n",
 657                                 node);
 658         }
 659 }
 660
 661 static int eeepc_hotk_add(struct acpi_device *device)
 662 {
 663         int result;
 664
 665         if (!device)
 666                  return -EINVAL;
 667         printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
 668         ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
 669         if (!ehotk)
 670                 return -ENOMEM;
 671         ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
 672         ehotk->handle = device->handle;
 673         strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
 674         strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
 675         device->driver_data = ehotk;
 676         ehotk->device = device;
 677         result = eeepc_hotk_check();
 678         if (result)
 679                 goto ehotk_fail;
 680
 681         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6");
 682         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
 683
 684         if (get_acpi(CM_ASL_WLAN) != -1) {
 685                 ehotk->eeepc_wlan_rfkill = rfkill_alloc("eeepc-wlan",
 686                                                         &device->dev,
 687                                                         RFKILL_TYPE_WLAN,
 688                                                         &eeepc_rfkill_ops,
 689                                                         (void *)CM_ASL_WLAN);
 690
 691                 if (!ehotk->eeepc_wlan_rfkill)
 692                         goto wlan_fail;
 693
 694                 rfkill_init_sw_state(ehotk->eeepc_wlan_rfkill,
 695                                      get_acpi(CM_ASL_WLAN) != 1);
 696                 result = rfkill_register(ehotk->eeepc_wlan_rfkill);
 697                 if (result)
 698                         goto wlan_fail;
 699         }
 700
 701         if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
 702                 ehotk->eeepc_bluetooth_rfkill =
 703                         rfkill_alloc("eeepc-bluetooth",
 704                                      &device->dev,
 705                                      RFKILL_TYPE_BLUETOOTH,
 706                                      &eeepc_rfkill_ops,
 707                                      (void *)CM_ASL_BLUETOOTH);
 708
 709                 if (!ehotk->eeepc_bluetooth_rfkill)
 710                         goto bluetooth_fail;
 711
 712                 rfkill_init_sw_state(ehotk->eeepc_bluetooth_rfkill,
 713                                      get_acpi(CM_ASL_BLUETOOTH) != 1);
 714                 result = rfkill_register(ehotk->eeepc_bluetooth_rfkill);
 715                 if (result)
 716                         goto bluetooth_fail;
 717         }
 718
 719         return 0;
 720
 721  bluetooth_fail:
 722         rfkill_destroy(ehotk->eeepc_bluetooth_rfkill);
 723         rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 724  wlan_fail:
 725         rfkill_destroy(ehotk->eeepc_wlan_rfkill);
 726         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 727         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 728  ehotk_fail:
 729         kfree(ehotk);
 730         ehotk = NULL;
 731
 732         return result;
 733 }
 734
 735 static int eeepc_hotk_remove(struct acpi_device *device, int type)
 736 {
 737         if (!device || !acpi_driver_data(device))
 738                  return -EINVAL;
 739
 740         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 741         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 742
 743         kfree(ehotk);
 744         return 0;
 745 }
 746
 747 static int eeepc_hotk_resume(struct acpi_device *device)
 748 {
 749         if (ehotk->eeepc_wlan_rfkill) {
 750                 bool wlan;
 751
 752                 /* Workaround - it seems that _PTS disables the wireless
 753                    without notification or changing the value read by WLAN.
 754                    Normally this is fine because the correct value is restored
 755                    from the non-volatile storage on resume, but we need to do
 756                    it ourself if case suspend is aborted, or we lose wireless.
 757                  */
 758                 wlan = get_acpi(CM_ASL_WLAN);
 759                 set_acpi(CM_ASL_WLAN, wlan);
 760
 761                 rfkill_set_sw_state(ehotk->eeepc_wlan_rfkill,
 762                                     wlan != 1);
 763
 764                 eeepc_rfkill_hotplug();
 765         }
 766
 767         if (ehotk->eeepc_bluetooth_rfkill)
 768                 rfkill_set_sw_state(ehotk->eeepc_bluetooth_rfkill,
 769                                     get_acpi(CM_ASL_BLUETOOTH) != 1);
 770
 771         return 0;
 772 }
 773
 774 /*
 775  * Hwmon
 776  */
 777 static int eeepc_get_fan_pwm(void)
 778 {
 779         int value = 0;
 780
 781         read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
 782         value = value * 255 / 100;
 783         return (value);
 784 }
 785
 786 static void eeepc_set_fan_pwm(int value)
 787 {
 788         value = SENSORS_LIMIT(value, 0, 255);
 789         value = value * 100 / 255;
 790         ec_write(EEEPC_EC_SC02, value);
 791 }
 792
 793 static int eeepc_get_fan_rpm(void)
 794 {
 795         int high = 0;
 796         int low = 0;
 797
 798         read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
 799         read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
 800         return (high << 8 | low);
 801 }
 802
 803 static int eeepc_get_fan_ctrl(void)
 804 {
 805         int value = 0;
 806
 807         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 808         return ((value & 0x02 ? 1 : 0));
 809 }
 810
 811 static void eeepc_set_fan_ctrl(int manual)
 812 {
 813         int value = 0;
 814
 815         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 816         if (manual)
 817                 value |= 0x02;
 818         else
 819                 value &= ~0x02;
 820         ec_write(EEEPC_EC_SFB3, value);
 821 }
 822
 823 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 824 {
 825         int rv, value;
 826
 827         rv = parse_arg(buf, count, &value);
 828         if (rv > 0)
 829                 set(value);
 830         return rv;
 831 }
 832
 833 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
 834 {
 835         return sprintf(buf, "%d\n", get());
 836 }
 837
 838 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get)              \
 839         static ssize_t show_##_name(struct device *dev,                 \
 840                                     struct device_attribute *attr,      \
 841                                     char *buf)                          \
 842         {                                                               \
 843                 return show_sys_hwmon(_set, buf);                       \
 844         }                                                               \
 845         static ssize_t store_##_name(struct device *dev,                \
 846                                      struct device_attribute *attr,     \
 847                                      const char *buf, size_t count)     \
 848         {                                                               \
 849                 return store_sys_hwmon(_get, buf, count);               \
 850         }                                                               \
 851         static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
 852
 853 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
 854 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
 855                          eeepc_get_fan_pwm, eeepc_set_fan_pwm);
 856 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 857                          eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
 858
 859 static ssize_t
 860 show_name(struct device *dev, struct device_attribute *attr, char *buf)
 861 {
 862         return sprintf(buf, "eeepc\n");
 863 }
 864 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
 865
 866 static struct attribute *hwmon_attributes[] = {
 867         &sensor_dev_attr_pwm1.dev_attr.attr,
 868         &sensor_dev_attr_fan1_input.dev_attr.attr,
 869         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 870         &sensor_dev_attr_name.dev_attr.attr,
 871         NULL
 872 };
 873
 874 static struct attribute_group hwmon_attribute_group = {
 875         .attrs = hwmon_attributes
 876 };
 877
 878 /*
 879  * exit/init
 880  */
 881 static void eeepc_backlight_exit(void)
 882 {
 883         if (eeepc_backlight_device)
 884                 backlight_device_unregister(eeepc_backlight_device);
 885         eeepc_backlight_device = NULL;
 886 }
 887
 888 static void eeepc_rfkill_exit(void)
 889 {
 890         if (ehotk->eeepc_wlan_rfkill)
 891                 rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 892         if (ehotk->eeepc_bluetooth_rfkill)
 893                 rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
 894 }
 895
 896 static void eeepc_input_exit(void)
 897 {
 898         if (ehotk->inputdev)
 899                 input_unregister_device(ehotk->inputdev);
 900 }
 901
 902 static void eeepc_hwmon_exit(void)
 903 {
 904         struct device *hwmon;
 905
 906         hwmon = eeepc_hwmon_device;
 907         if (!hwmon)
 908                 return ;
 909         sysfs_remove_group(&hwmon->kobj,
 910                            &hwmon_attribute_group);
 911         hwmon_device_unregister(hwmon);
 912         eeepc_hwmon_device = NULL;
 913 }
 914
 915 static void __exit eeepc_laptop_exit(void)
 916 {
 917         eeepc_backlight_exit();
 918         eeepc_rfkill_exit();
 919         eeepc_input_exit();
 920         eeepc_hwmon_exit();
 921         acpi_bus_unregister_driver(&eeepc_hotk_driver);
 922         sysfs_remove_group(&platform_device->dev.kobj,
 923                            &platform_attribute_group);
 924         platform_device_unregister(platform_device);
 925         platform_driver_unregister(&platform_driver);
 926 }
 927
 928 static int eeepc_backlight_init(struct device *dev)
 929 {
 930         struct backlight_device *bd;
 931
 932         bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
 933                                        NULL, &eeepcbl_ops);
 934         if (IS_ERR(bd)) {
 935                 printk(EEEPC_ERR
 936                        "Could not register eeepc backlight device\n");
 937                 eeepc_backlight_device = NULL;
 938                 return PTR_ERR(bd);
 939         }
 940         eeepc_backlight_device = bd;
 941         bd->props.max_brightness = 15;
 942         bd->props.brightness = read_brightness(NULL);
 943         bd->props.power = FB_BLANK_UNBLANK;
 944         backlight_update_status(bd);
 945         return 0;
 946 }
 947
 948 static int eeepc_hwmon_init(struct device *dev)
 949 {
 950         struct device *hwmon;
 951         int result;
 952
 953         hwmon = hwmon_device_register(dev);
 954         if (IS_ERR(hwmon)) {
 955                 printk(EEEPC_ERR
 956                        "Could not register eeepc hwmon device\n");
 957                 eeepc_hwmon_device = NULL;
 958                 return PTR_ERR(hwmon);
 959         }
 960         eeepc_hwmon_device = hwmon;
 961         result = sysfs_create_group(&hwmon->kobj,
 962                                     &hwmon_attribute_group);
 963         if (result)
 964                 eeepc_hwmon_exit();
 965         return result;
 966 }
 967
 968 static int __init eeepc_laptop_init(void)
 969 {
 970         struct device *dev;
 971         int result;
 972
 973         if (acpi_disabled)
 974                 return -ENODEV;
 975         result = acpi_bus_register_driver(&eeepc_hotk_driver);
 976         if (result < 0)
 977                 return result;
 978         if (!ehotk) {
 979                 acpi_bus_unregister_driver(&eeepc_hotk_driver);
 980                 return -ENODEV;
 981         }
 982         dev = acpi_get_physical_device(ehotk->device->handle);
 983
 984         if (!acpi_video_backlight_support()) {
 985                 result = eeepc_backlight_init(dev);
 986                 if (result)
 987                         goto fail_backlight;
 988         } else
 989                 printk(EEEPC_INFO "Backlight controlled by ACPI video "
 990                        "driver\n");
 991
 992         result = eeepc_hwmon_init(dev);
 993         if (result)
 994                 goto fail_hwmon;
 995
 996         eeepc_enable_camera();
 997
 998         /* Register platform stuff */
 999         result = platform_driver_register(&platform_driver);
1000         if (result)
1001                 goto fail_platform_driver;
1002         platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
1003         if (!platform_device) {
1004                 result = -ENOMEM;
1005                 goto fail_platform_device1;
1006         }
1007         result = platform_device_add(platform_device);
1008         if (result)
1009                 goto fail_platform_device2;
1010         result = sysfs_create_group(&platform_device->dev.kobj,
1011                                     &platform_attribute_group);
1012         if (result)
1013                 goto fail_sysfs;
1014         return 0;
1015 fail_sysfs:
1016         platform_device_del(platform_device);
1017 fail_platform_device2:
1018         platform_device_put(platform_device);
1019 fail_platform_device1:
1020         platform_driver_unregister(&platform_driver);
1021 fail_platform_driver:
1022         eeepc_hwmon_exit();
1023 fail_hwmon:
1024         eeepc_backlight_exit();
1025 fail_backlight:
1026         eeepc_input_exit();
1027         eeepc_rfkill_exit();
1028         return result;
1029 }
1030
1031 module_init(eeepc_laptop_init);
1032 module_exit(eeepc_laptop_exit);