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
 184 static const struct acpi_device_id eeepc_device_ids[] = {
 185         {EEEPC_HOTK_HID, 0},
 186         {"", 0},
 187 };
 188 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
 189
 190 static struct acpi_driver eeepc_hotk_driver = {
 191         .name = EEEPC_HOTK_NAME,
 192         .class = EEEPC_HOTK_CLASS,
 193         .ids = eeepc_device_ids,
 194         .ops = {
 195                 .add = eeepc_hotk_add,
 196                 .remove = eeepc_hotk_remove,
 197         },
 198 };
 199
 200 /* The backlight device /sys/class/backlight */
 201 static struct backlight_device *eeepc_backlight_device;
 202
 203 /* The hwmon device */
 204 static struct device *eeepc_hwmon_device;
 205
 206 /*
 207  * The backlight class declaration
 208  */
 209 static int read_brightness(struct backlight_device *bd);
 210 static int update_bl_status(struct backlight_device *bd);
 211 static struct backlight_ops eeepcbl_ops = {
 212         .get_brightness = read_brightness,
 213         .update_status = update_bl_status,
 214 };
 215
 216 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
 217 MODULE_DESCRIPTION(EEEPC_HOTK_NAME);
 218 MODULE_LICENSE("GPL");
 219
 220 /*
 221  * ACPI Helpers
 222  */
 223 static int write_acpi_int(acpi_handle handle, const char *method, int val,
 224                           struct acpi_buffer *output)
 225 {
 226         struct acpi_object_list params;
 227         union acpi_object in_obj;
 228         acpi_status status;
 229
 230         params.count = 1;
 231         params.pointer = &in_obj;
 232         in_obj.type = ACPI_TYPE_INTEGER;
 233         in_obj.integer.value = val;
 234
 235         status = acpi_evaluate_object(handle, (char *)method, &params, output);
 236         return (status == AE_OK ? 0 : -1);
 237 }
 238
 239 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 240 {
 241         acpi_status status;
 242         unsigned long long result;
 243
 244         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 245         if (ACPI_FAILURE(status)) {
 246                 *val = -1;
 247                 return -1;
 248         } else {
 249                 *val = result;
 250                 return 0;
 251         }
 252 }
 253
 254 static int set_acpi(int cm, int value)
 255 {
 256         if (ehotk->cm_supported & (0x1 << cm)) {
 257                 const char *method = cm_setv[cm];
 258                 if (method == NULL)
 259                         return -ENODEV;
 260                 if (write_acpi_int(ehotk->handle, method, value, NULL))
 261                         printk(EEEPC_WARNING "Error writing %s\n", method);
 262         }
 263         return 0;
 264 }
 265
 266 static int get_acpi(int cm)
 267 {
 268         int value = -1;
 269         if ((ehotk->cm_supported & (0x1 << cm))) {
 270                 const char *method = cm_getv[cm];
 271                 if (method == NULL)
 272                         return -ENODEV;
 273                 if (read_acpi_int(ehotk->handle, method, &value))
 274                         printk(EEEPC_WARNING "Error reading %s\n", method);
 275         }
 276         return value;
 277 }
 278
 279 /*
 280  * Backlight
 281  */
 282 static int read_brightness(struct backlight_device *bd)
 283 {
 284         return get_acpi(CM_ASL_PANELBRIGHT);
 285 }
 286
 287 static int set_brightness(struct backlight_device *bd, int value)
 288 {
 289         value = max(0, min(15, value));
 290         return set_acpi(CM_ASL_PANELBRIGHT, value);
 291 }
 292
 293 static int update_bl_status(struct backlight_device *bd)
 294 {
 295         return set_brightness(bd, bd->props.brightness);
 296 }
 297
 298 /*
 299  * Rfkill helpers
 300  */
 301
 302 static bool eeepc_wlan_rfkill_blocked(void)
 303 {
 304         if (get_acpi(CM_ASL_WLAN) == 1)
 305                 return false;
 306         return true;
 307 }
 308
 309 static int eeepc_rfkill_set(void *data, bool blocked)
 310 {
 311         unsigned long asl = (unsigned long)data;
 312         return set_acpi(asl, !blocked);
 313 }
 314
 315 static const struct rfkill_ops eeepc_rfkill_ops = {
 316         .set_block = eeepc_rfkill_set,
 317 };
 318
 319 /*
 320  * Sys helpers
 321  */
 322 static int parse_arg(const char *buf, unsigned long count, int *val)
 323 {
 324         if (!count)
 325                 return 0;
 326         if (sscanf(buf, "%i", val) != 1)
 327                 return -EINVAL;
 328         return count;
 329 }
 330
 331 static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
 332 {
 333         int rv, value;
 334
 335         rv = parse_arg(buf, count, &value);
 336         if (rv > 0)
 337                 set_acpi(cm, value);
 338         return rv;
 339 }
 340
 341 static ssize_t show_sys_acpi(int cm, char *buf)
 342 {
 343         return sprintf(buf, "%d\n", get_acpi(cm));
 344 }
 345
 346 #define EEEPC_CREATE_DEVICE_ATTR(_name, _cm)                            \
 347         static ssize_t show_##_name(struct device *dev,                 \
 348                                     struct device_attribute *attr,      \
 349                                     char *buf)                          \
 350         {                                                               \
 351                 return show_sys_acpi(_cm, buf);                         \
 352         }                                                               \
 353         static ssize_t store_##_name(struct device *dev,                \
 354                                      struct device_attribute *attr,     \
 355                                      const char *buf, size_t count)     \
 356         {                                                               \
 357                 return store_sys_acpi(_cm, buf, count);                 \
 358         }                                                               \
 359         static struct device_attribute dev_attr_##_name = {             \
 360                 .attr = {                                               \
 361                         .name = __stringify(_name),                     \
 362                         .mode = 0644 },                                 \
 363                 .show   = show_##_name,                                 \
 364                 .store  = store_##_name,                                \
 365         }
 366
 367 EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
 368 EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
 369 EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
 370 EEEPC_CREATE_DEVICE_ATTR(cpufv, CM_ASL_CPUFV);
 371
 372 static struct attribute *platform_attributes[] = {
 373         &dev_attr_camera.attr,
 374         &dev_attr_cardr.attr,
 375         &dev_attr_disp.attr,
 376         &dev_attr_cpufv.attr,
 377         NULL
 378 };
 379
 380 static struct attribute_group platform_attribute_group = {
 381         .attrs = platform_attributes
 382 };
 383
 384 /*
 385  * Hotkey functions
 386  */
 387 static struct key_entry *eepc_get_entry_by_scancode(int code)
 388 {
 389         struct key_entry *key;
 390
 391         for (key = eeepc_keymap; key->type != KE_END; key++)
 392                 if (code == key->code)
 393                         return key;
 394
 395         return NULL;
 396 }
 397
 398 static struct key_entry *eepc_get_entry_by_keycode(int code)
 399 {
 400         struct key_entry *key;
 401
 402         for (key = eeepc_keymap; key->type != KE_END; key++)
 403                 if (code == key->keycode && key->type == KE_KEY)
 404                         return key;
 405
 406         return NULL;
 407 }
 408
 409 static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
 410 {
 411         struct key_entry *key = eepc_get_entry_by_scancode(scancode);
 412
 413         if (key && key->type == KE_KEY) {
 414                 *keycode = key->keycode;
 415                 return 0;
 416         }
 417
 418         return -EINVAL;
 419 }
 420
 421 static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
 422 {
 423         struct key_entry *key;
 424         int old_keycode;
 425
 426         if (keycode < 0 || keycode > KEY_MAX)
 427                 return -EINVAL;
 428
 429         key = eepc_get_entry_by_scancode(scancode);
 430         if (key && key->type == KE_KEY) {
 431                 old_keycode = key->keycode;
 432                 key->keycode = keycode;
 433                 set_bit(keycode, dev->keybit);
 434                 if (!eepc_get_entry_by_keycode(old_keycode))
 435                         clear_bit(old_keycode, dev->keybit);
 436                 return 0;
 437         }
 438
 439         return -EINVAL;
 440 }
 441
 442 static int eeepc_hotk_check(void)
 443 {
 444         const struct key_entry *key;
 445         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 446         int result;
 447
 448         result = acpi_bus_get_status(ehotk->device);
 449         if (result)
 450                 return result;
 451         if (ehotk->device->status.present) {
 452                 if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
 453                                     &buffer)) {
 454                         printk(EEEPC_ERR "Hotkey initialization failed\n");
 455                         return -ENODEV;
 456                 } else {
 457                         printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
 458                                ehotk->init_flag);
 459                 }
 460                 /* get control methods supported */
 461                 if (read_acpi_int(ehotk->handle, "CMSG"
 462                                    , &ehotk->cm_supported)) {
 463                         printk(EEEPC_ERR
 464                                "Get control methods supported failed\n");
 465                         return -ENODEV;
 466                 } else {
 467                         printk(EEEPC_INFO
 468                                "Get control methods supported: 0x%x\n",
 469                                ehotk->cm_supported);
 470                 }
 471                 ehotk->inputdev = input_allocate_device();
 472                 if (!ehotk->inputdev) {
 473                         printk(EEEPC_INFO "Unable to allocate input device\n");
 474                         return 0;
 475                 }
 476                 ehotk->inputdev->name = "Asus EeePC extra buttons";
 477                 ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
 478                 ehotk->inputdev->id.bustype = BUS_HOST;
 479                 ehotk->inputdev->getkeycode = eeepc_getkeycode;
 480                 ehotk->inputdev->setkeycode = eeepc_setkeycode;
 481
 482                 for (key = eeepc_keymap; key->type != KE_END; key++) {
 483                         switch (key->type) {
 484                         case KE_KEY:
 485                                 set_bit(EV_KEY, ehotk->inputdev->evbit);
 486                                 set_bit(key->keycode, ehotk->inputdev->keybit);
 487                                 break;
 488                         }
 489                 }
 490                 result = input_register_device(ehotk->inputdev);
 491                 if (result) {
 492                         printk(EEEPC_INFO "Unable to register input device\n");
 493                         input_free_device(ehotk->inputdev);
 494                         return 0;
 495                 }
 496         } else {
 497                 printk(EEEPC_ERR "Hotkey device not present, aborting\n");
 498                 return -EINVAL;
 499         }
 500         return 0;
 501 }
 502
 503 static int notify_brn(void)
 504 {
 505         /* returns the *previous* brightness, or -1 */
 506         struct backlight_device *bd = eeepc_backlight_device;
 507         if (bd) {
 508                 int old = bd->props.brightness;
 509                 bd->props.brightness = read_brightness(bd);
 510                 return old;
 511         }
 512         return -1;
 513 }
 514
 515 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 516 {
 517         struct pci_dev *dev;
 518         struct pci_bus *bus = pci_find_bus(0, 1);
 519         bool blocked;
 520
 521         if (event != ACPI_NOTIFY_BUS_CHECK)
 522                 return;
 523
 524         if (!bus) {
 525                 printk(EEEPC_WARNING "Unable to find PCI bus 1?\n");
 526                 return;
 527         }
 528
 529         blocked = eeepc_wlan_rfkill_blocked();
 530         if (!blocked) {
 531                 dev = pci_get_slot(bus, 0);
 532                 if (dev) {
 533                         /* Device already present */
 534                         pci_dev_put(dev);
 535                         return;
 536                 }
 537                 dev = pci_scan_single_device(bus, 0);
 538                 if (dev) {
 539                         pci_bus_assign_resources(bus);
 540                         if (pci_bus_add_device(dev))
 541                                 printk(EEEPC_ERR "Unable to hotplug wifi\n");
 542                 }
 543         } else {
 544                 dev = pci_get_slot(bus, 0);
 545                 if (dev) {
 546                         pci_remove_bus_device(dev);
 547                         pci_dev_put(dev);
 548                 }
 549         }
 550
 551         rfkill_set_sw_state(ehotk->eeepc_wlan_rfkill, blocked);
 552 }
 553
 554 static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
 555 {
 556         static struct key_entry *key;
 557         u16 count;
 558         int brn = -ENODEV;
 559
 560         if (!ehotk)
 561                 return;
 562         if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
 563                 brn = notify_brn();
 564         count = ehotk->event_count[event % 128]++;
 565         acpi_bus_generate_proc_event(ehotk->device, event, count);
 566         acpi_bus_generate_netlink_event(ehotk->device->pnp.device_class,
 567                                         dev_name(&ehotk->device->dev), event,
 568                                         count);
 569         if (ehotk->inputdev) {
 570                 if (brn != -ENODEV) {
 571                         /* brightness-change events need special
 572                          * handling for conversion to key events
 573                          */
 574                         if (brn < 0)
 575                                 brn = event;
 576                         else
 577                                 brn += NOTIFY_BRN_MIN;
 578                         if (event < brn)
 579                                 event = NOTIFY_BRN_MIN; /* brightness down */
 580                         else if (event > brn)
 581                                 event = NOTIFY_BRN_MIN + 2; /* ... up */
 582                         else
 583                                 event = NOTIFY_BRN_MIN + 1; /* ... unchanged */
 584                 }
 585                 key = eepc_get_entry_by_scancode(event);
 586                 if (key) {
 587                         switch (key->type) {
 588                         case KE_KEY:
 589                                 input_report_key(ehotk->inputdev, key->keycode,
 590                                                  1);
 591                                 input_sync(ehotk->inputdev);
 592                                 input_report_key(ehotk->inputdev, key->keycode,
 593                                                  0);
 594                                 input_sync(ehotk->inputdev);
 595                                 break;
 596                         }
 597                 }
 598         }
 599 }
 600
 601 static int eeepc_register_rfkill_notifier(char *node)
 602 {
 603         acpi_status status = AE_OK;
 604         acpi_handle handle;
 605
 606         status = acpi_get_handle(NULL, node, &handle);
 607
 608         if (ACPI_SUCCESS(status)) {
 609                 status = acpi_install_notify_handler(handle,
 610                                                      ACPI_SYSTEM_NOTIFY,
 611                                                      eeepc_rfkill_notify,
 612                                                      NULL);
 613                 if (ACPI_FAILURE(status))
 614                         printk(EEEPC_WARNING
 615                                "Failed to register notify on %s\n", node);
 616         } else
 617                 return -ENODEV;
 618
 619         return 0;
 620 }
 621
 622 static void eeepc_unregister_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_remove_notify_handler(handle,
 631                                                      ACPI_SYSTEM_NOTIFY,
 632                                                      eeepc_rfkill_notify);
 633                 if (ACPI_FAILURE(status))
 634                         printk(EEEPC_ERR
 635                                "Error removing rfkill notify handler %s\n",
 636                                 node);
 637         }
 638 }
 639
 640 static int eeepc_hotk_add(struct acpi_device *device)
 641 {
 642         acpi_status status = AE_OK;
 643         int result;
 644
 645         if (!device)
 646                  return -EINVAL;
 647         printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
 648         ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
 649         if (!ehotk)
 650                 return -ENOMEM;
 651         ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
 652         ehotk->handle = device->handle;
 653         strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
 654         strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
 655         device->driver_data = ehotk;
 656         ehotk->device = device;
 657         result = eeepc_hotk_check();
 658         if (result)
 659                 goto ehotk_fail;
 660         status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 661                                              eeepc_hotk_notify, ehotk);
 662         if (ACPI_FAILURE(status))
 663                 printk(EEEPC_ERR "Error installing notify handler\n");
 664
 665         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6");
 666         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
 667
 668         if (get_acpi(CM_ASL_WLAN) != -1) {
 669                 ehotk->eeepc_wlan_rfkill = rfkill_alloc("eeepc-wlan",
 670                                                         &device->dev,
 671                                                         RFKILL_TYPE_WLAN,
 672                                                         &eeepc_rfkill_ops,
 673                                                         (void *)CM_ASL_WLAN);
 674
 675                 if (!ehotk->eeepc_wlan_rfkill)
 676                         goto wlan_fail;
 677
 678                 rfkill_set_sw_state(ehotk->eeepc_wlan_rfkill,
 679                                     get_acpi(CM_ASL_WLAN) != 1);
 680                 result = rfkill_register(ehotk->eeepc_wlan_rfkill);
 681                 if (result)
 682                         goto wlan_fail;
 683         }
 684
 685         if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
 686                 ehotk->eeepc_bluetooth_rfkill =
 687                         rfkill_alloc("eeepc-bluetooth",
 688                                      &device->dev,
 689                                      RFKILL_TYPE_BLUETOOTH,
 690                                      &eeepc_rfkill_ops,
 691                                      (void *)CM_ASL_BLUETOOTH);
 692
 693                 if (!ehotk->eeepc_bluetooth_rfkill)
 694                         goto bluetooth_fail;
 695
 696                 rfkill_set_sw_state(ehotk->eeepc_bluetooth_rfkill,
 697                                     get_acpi(CM_ASL_BLUETOOTH) != 1);
 698                 result = rfkill_register(ehotk->eeepc_bluetooth_rfkill);
 699                 if (result)
 700                         goto bluetooth_fail;
 701         }
 702
 703         return 0;
 704
 705  bluetooth_fail:
 706         rfkill_destroy(ehotk->eeepc_bluetooth_rfkill);
 707         rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 708  wlan_fail:
 709         rfkill_destroy(ehotk->eeepc_wlan_rfkill);
 710         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 711         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 712  ehotk_fail:
 713         kfree(ehotk);
 714         ehotk = NULL;
 715
 716         return result;
 717 }
 718
 719 static int eeepc_hotk_remove(struct acpi_device *device, int type)
 720 {
 721         acpi_status status = 0;
 722
 723         if (!device || !acpi_driver_data(device))
 724                  return -EINVAL;
 725         status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 726                                             eeepc_hotk_notify);
 727         if (ACPI_FAILURE(status))
 728                 printk(EEEPC_ERR "Error removing notify handler\n");
 729
 730         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 731         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 732
 733         kfree(ehotk);
 734         return 0;
 735 }
 736
 737 /*
 738  * Hwmon
 739  */
 740 static int eeepc_get_fan_pwm(void)
 741 {
 742         int value = 0;
 743
 744         read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
 745         value = value * 255 / 100;
 746         return (value);
 747 }
 748
 749 static void eeepc_set_fan_pwm(int value)
 750 {
 751         value = SENSORS_LIMIT(value, 0, 255);
 752         value = value * 100 / 255;
 753         ec_write(EEEPC_EC_SC02, value);
 754 }
 755
 756 static int eeepc_get_fan_rpm(void)
 757 {
 758         int high = 0;
 759         int low = 0;
 760
 761         read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
 762         read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
 763         return (high << 8 | low);
 764 }
 765
 766 static int eeepc_get_fan_ctrl(void)
 767 {
 768         int value = 0;
 769
 770         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 771         return ((value & 0x02 ? 1 : 0));
 772 }
 773
 774 static void eeepc_set_fan_ctrl(int manual)
 775 {
 776         int value = 0;
 777
 778         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 779         if (manual)
 780                 value |= 0x02;
 781         else
 782                 value &= ~0x02;
 783         ec_write(EEEPC_EC_SFB3, value);
 784 }
 785
 786 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 787 {
 788         int rv, value;
 789
 790         rv = parse_arg(buf, count, &value);
 791         if (rv > 0)
 792                 set(value);
 793         return rv;
 794 }
 795
 796 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
 797 {
 798         return sprintf(buf, "%d\n", get());
 799 }
 800
 801 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get)              \
 802         static ssize_t show_##_name(struct device *dev,                 \
 803                                     struct device_attribute *attr,      \
 804                                     char *buf)                          \
 805         {                                                               \
 806                 return show_sys_hwmon(_set, buf);                       \
 807         }                                                               \
 808         static ssize_t store_##_name(struct device *dev,                \
 809                                      struct device_attribute *attr,     \
 810                                      const char *buf, size_t count)     \
 811         {                                                               \
 812                 return store_sys_hwmon(_get, buf, count);               \
 813         }                                                               \
 814         static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
 815
 816 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
 817 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
 818                          eeepc_get_fan_pwm, eeepc_set_fan_pwm);
 819 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 820                          eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
 821
 822 static ssize_t
 823 show_name(struct device *dev, struct device_attribute *attr, char *buf)
 824 {
 825         return sprintf(buf, "eeepc\n");
 826 }
 827 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
 828
 829 static struct attribute *hwmon_attributes[] = {
 830         &sensor_dev_attr_pwm1.dev_attr.attr,
 831         &sensor_dev_attr_fan1_input.dev_attr.attr,
 832         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 833         &sensor_dev_attr_name.dev_attr.attr,
 834         NULL
 835 };
 836
 837 static struct attribute_group hwmon_attribute_group = {
 838         .attrs = hwmon_attributes
 839 };
 840
 841 /*
 842  * exit/init
 843  */
 844 static void eeepc_backlight_exit(void)
 845 {
 846         if (eeepc_backlight_device)
 847                 backlight_device_unregister(eeepc_backlight_device);
 848         eeepc_backlight_device = NULL;
 849 }
 850
 851 static void eeepc_rfkill_exit(void)
 852 {
 853         if (ehotk->eeepc_wlan_rfkill)
 854                 rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 855         if (ehotk->eeepc_bluetooth_rfkill)
 856                 rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
 857 }
 858
 859 static void eeepc_input_exit(void)
 860 {
 861         if (ehotk->inputdev)
 862                 input_unregister_device(ehotk->inputdev);
 863 }
 864
 865 static void eeepc_hwmon_exit(void)
 866 {
 867         struct device *hwmon;
 868
 869         hwmon = eeepc_hwmon_device;
 870         if (!hwmon)
 871                 return ;
 872         sysfs_remove_group(&hwmon->kobj,
 873                            &hwmon_attribute_group);
 874         hwmon_device_unregister(hwmon);
 875         eeepc_hwmon_device = NULL;
 876 }
 877
 878 static void __exit eeepc_laptop_exit(void)
 879 {
 880         eeepc_backlight_exit();
 881         eeepc_rfkill_exit();
 882         eeepc_input_exit();
 883         eeepc_hwmon_exit();
 884         acpi_bus_unregister_driver(&eeepc_hotk_driver);
 885         sysfs_remove_group(&platform_device->dev.kobj,
 886                            &platform_attribute_group);
 887         platform_device_unregister(platform_device);
 888         platform_driver_unregister(&platform_driver);
 889 }
 890
 891 static int eeepc_backlight_init(struct device *dev)
 892 {
 893         struct backlight_device *bd;
 894
 895         bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
 896                                        NULL, &eeepcbl_ops);
 897         if (IS_ERR(bd)) {
 898                 printk(EEEPC_ERR
 899                        "Could not register eeepc backlight device\n");
 900                 eeepc_backlight_device = NULL;
 901                 return PTR_ERR(bd);
 902         }
 903         eeepc_backlight_device = bd;
 904         bd->props.max_brightness = 15;
 905         bd->props.brightness = read_brightness(NULL);
 906         bd->props.power = FB_BLANK_UNBLANK;
 907         backlight_update_status(bd);
 908         return 0;
 909 }
 910
 911 static int eeepc_hwmon_init(struct device *dev)
 912 {
 913         struct device *hwmon;
 914         int result;
 915
 916         hwmon = hwmon_device_register(dev);
 917         if (IS_ERR(hwmon)) {
 918                 printk(EEEPC_ERR
 919                        "Could not register eeepc hwmon device\n");
 920                 eeepc_hwmon_device = NULL;
 921                 return PTR_ERR(hwmon);
 922         }
 923         eeepc_hwmon_device = hwmon;
 924         result = sysfs_create_group(&hwmon->kobj,
 925                                     &hwmon_attribute_group);
 926         if (result)
 927                 eeepc_hwmon_exit();
 928         return result;
 929 }
 930
 931 static int __init eeepc_laptop_init(void)
 932 {
 933         struct device *dev;
 934         int result;
 935
 936         if (acpi_disabled)
 937                 return -ENODEV;
 938         result = acpi_bus_register_driver(&eeepc_hotk_driver);
 939         if (result < 0)
 940                 return result;
 941         if (!ehotk) {
 942                 acpi_bus_unregister_driver(&eeepc_hotk_driver);
 943                 return -ENODEV;
 944         }
 945         dev = acpi_get_physical_device(ehotk->device->handle);
 946
 947         if (!acpi_video_backlight_support()) {
 948                 result = eeepc_backlight_init(dev);
 949                 if (result)
 950                         goto fail_backlight;
 951         } else
 952                 printk(EEEPC_INFO "Backlight controlled by ACPI video "
 953                        "driver\n");
 954
 955         result = eeepc_hwmon_init(dev);
 956         if (result)
 957                 goto fail_hwmon;
 958         /* Register platform stuff */
 959         result = platform_driver_register(&platform_driver);
 960         if (result)
 961                 goto fail_platform_driver;
 962         platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
 963         if (!platform_device) {
 964                 result = -ENOMEM;
 965                 goto fail_platform_device1;
 966         }
 967         result = platform_device_add(platform_device);
 968         if (result)
 969                 goto fail_platform_device2;
 970         result = sysfs_create_group(&platform_device->dev.kobj,
 971                                     &platform_attribute_group);
 972         if (result)
 973                 goto fail_sysfs;
 974         return 0;
 975 fail_sysfs:
 976         platform_device_del(platform_device);
 977 fail_platform_device2:
 978         platform_device_put(platform_device);
 979 fail_platform_device1:
 980         platform_driver_unregister(&platform_driver);
 981 fail_platform_driver:
 982         eeepc_hwmon_exit();
 983 fail_hwmon:
 984         eeepc_backlight_exit();
 985 fail_backlight:
 986         eeepc_input_exit();
 987         eeepc_rfkill_exit();
 988         return result;
 989 }
 990
 991 module_init(eeepc_laptop_init);
 992 module_exit(eeepc_laptop_exit);