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 int eeepc_wlan_rfkill_set(void *data, enum rfkill_state state)
 303 {
 304         if (state == RFKILL_STATE_SOFT_BLOCKED)
 305                 return set_acpi(CM_ASL_WLAN, 0);
 306         else
 307                 return set_acpi(CM_ASL_WLAN, 1);
 308 }
 309
 310 static int eeepc_wlan_rfkill_state(void *data, enum rfkill_state *state)
 311 {
 312         if (get_acpi(CM_ASL_WLAN) == 1)
 313                 *state = RFKILL_STATE_UNBLOCKED;
 314         else
 315                 *state = RFKILL_STATE_SOFT_BLOCKED;
 316         return 0;
 317 }
 318
 319 static int eeepc_bluetooth_rfkill_set(void *data, enum rfkill_state state)
 320 {
 321         if (state == RFKILL_STATE_SOFT_BLOCKED)
 322                 return set_acpi(CM_ASL_BLUETOOTH, 0);
 323         else
 324                 return set_acpi(CM_ASL_BLUETOOTH, 1);
 325 }
 326
 327 static int eeepc_bluetooth_rfkill_state(void *data, enum rfkill_state *state)
 328 {
 329         if (get_acpi(CM_ASL_BLUETOOTH) == 1)
 330                 *state = RFKILL_STATE_UNBLOCKED;
 331         else
 332                 *state = RFKILL_STATE_SOFT_BLOCKED;
 333         return 0;
 334 }
 335
 336 /*
 337  * Sys helpers
 338  */
 339 static int parse_arg(const char *buf, unsigned long count, int *val)
 340 {
 341         if (!count)
 342                 return 0;
 343         if (sscanf(buf, "%i", val) != 1)
 344                 return -EINVAL;
 345         return count;
 346 }
 347
 348 static ssize_t store_sys_acpi(int cm, const char *buf, size_t count)
 349 {
 350         int rv, value;
 351
 352         rv = parse_arg(buf, count, &value);
 353         if (rv > 0)
 354                 set_acpi(cm, value);
 355         return rv;
 356 }
 357
 358 static ssize_t show_sys_acpi(int cm, char *buf)
 359 {
 360         return sprintf(buf, "%d\n", get_acpi(cm));
 361 }
 362
 363 #define EEEPC_CREATE_DEVICE_ATTR(_name, _cm)                            \
 364         static ssize_t show_##_name(struct device *dev,                 \
 365                                     struct device_attribute *attr,      \
 366                                     char *buf)                          \
 367         {                                                               \
 368                 return show_sys_acpi(_cm, buf);                         \
 369         }                                                               \
 370         static ssize_t store_##_name(struct device *dev,                \
 371                                      struct device_attribute *attr,     \
 372                                      const char *buf, size_t count)     \
 373         {                                                               \
 374                 return store_sys_acpi(_cm, buf, count);                 \
 375         }                                                               \
 376         static struct device_attribute dev_attr_##_name = {             \
 377                 .attr = {                                               \
 378                         .name = __stringify(_name),                     \
 379                         .mode = 0644 },                                 \
 380                 .show   = show_##_name,                                 \
 381                 .store  = store_##_name,                                \
 382         }
 383
 384 EEEPC_CREATE_DEVICE_ATTR(camera, CM_ASL_CAMERA);
 385 EEEPC_CREATE_DEVICE_ATTR(cardr, CM_ASL_CARDREADER);
 386 EEEPC_CREATE_DEVICE_ATTR(disp, CM_ASL_DISPLAYSWITCH);
 387 EEEPC_CREATE_DEVICE_ATTR(cpufv, CM_ASL_CPUFV);
 388
 389 static struct attribute *platform_attributes[] = {
 390         &dev_attr_camera.attr,
 391         &dev_attr_cardr.attr,
 392         &dev_attr_disp.attr,
 393         &dev_attr_cpufv.attr,
 394         NULL
 395 };
 396
 397 static struct attribute_group platform_attribute_group = {
 398         .attrs = platform_attributes
 399 };
 400
 401 /*
 402  * Hotkey functions
 403  */
 404 static struct key_entry *eepc_get_entry_by_scancode(int code)
 405 {
 406         struct key_entry *key;
 407
 408         for (key = eeepc_keymap; key->type != KE_END; key++)
 409                 if (code == key->code)
 410                         return key;
 411
 412         return NULL;
 413 }
 414
 415 static struct key_entry *eepc_get_entry_by_keycode(int code)
 416 {
 417         struct key_entry *key;
 418
 419         for (key = eeepc_keymap; key->type != KE_END; key++)
 420                 if (code == key->keycode && key->type == KE_KEY)
 421                         return key;
 422
 423         return NULL;
 424 }
 425
 426 static int eeepc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
 427 {
 428         struct key_entry *key = eepc_get_entry_by_scancode(scancode);
 429
 430         if (key && key->type == KE_KEY) {
 431                 *keycode = key->keycode;
 432                 return 0;
 433         }
 434
 435         return -EINVAL;
 436 }
 437
 438 static int eeepc_setkeycode(struct input_dev *dev, int scancode, int keycode)
 439 {
 440         struct key_entry *key;
 441         int old_keycode;
 442
 443         if (keycode < 0 || keycode > KEY_MAX)
 444                 return -EINVAL;
 445
 446         key = eepc_get_entry_by_scancode(scancode);
 447         if (key && key->type == KE_KEY) {
 448                 old_keycode = key->keycode;
 449                 key->keycode = keycode;
 450                 set_bit(keycode, dev->keybit);
 451                 if (!eepc_get_entry_by_keycode(old_keycode))
 452                         clear_bit(old_keycode, dev->keybit);
 453                 return 0;
 454         }
 455
 456         return -EINVAL;
 457 }
 458
 459 static int eeepc_hotk_check(void)
 460 {
 461         const struct key_entry *key;
 462         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
 463         int result;
 464
 465         result = acpi_bus_get_status(ehotk->device);
 466         if (result)
 467                 return result;
 468         if (ehotk->device->status.present) {
 469                 if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag,
 470                                     &buffer)) {
 471                         printk(EEEPC_ERR "Hotkey initialization failed\n");
 472                         return -ENODEV;
 473                 } else {
 474                         printk(EEEPC_NOTICE "Hotkey init flags 0x%x\n",
 475                                ehotk->init_flag);
 476                 }
 477                 /* get control methods supported */
 478                 if (read_acpi_int(ehotk->handle, "CMSG"
 479                                    , &ehotk->cm_supported)) {
 480                         printk(EEEPC_ERR
 481                                "Get control methods supported failed\n");
 482                         return -ENODEV;
 483                 } else {
 484                         printk(EEEPC_INFO
 485                                "Get control methods supported: 0x%x\n",
 486                                ehotk->cm_supported);
 487                 }
 488                 ehotk->inputdev = input_allocate_device();
 489                 if (!ehotk->inputdev) {
 490                         printk(EEEPC_INFO "Unable to allocate input device\n");
 491                         return 0;
 492                 }
 493                 ehotk->inputdev->name = "Asus EeePC extra buttons";
 494                 ehotk->inputdev->phys = EEEPC_HOTK_FILE "/input0";
 495                 ehotk->inputdev->id.bustype = BUS_HOST;
 496                 ehotk->inputdev->getkeycode = eeepc_getkeycode;
 497                 ehotk->inputdev->setkeycode = eeepc_setkeycode;
 498
 499                 for (key = eeepc_keymap; key->type != KE_END; key++) {
 500                         switch (key->type) {
 501                         case KE_KEY:
 502                                 set_bit(EV_KEY, ehotk->inputdev->evbit);
 503                                 set_bit(key->keycode, ehotk->inputdev->keybit);
 504                                 break;
 505                         }
 506                 }
 507                 result = input_register_device(ehotk->inputdev);
 508                 if (result) {
 509                         printk(EEEPC_INFO "Unable to register input device\n");
 510                         input_free_device(ehotk->inputdev);
 511                         return 0;
 512                 }
 513         } else {
 514                 printk(EEEPC_ERR "Hotkey device not present, aborting\n");
 515                 return -EINVAL;
 516         }
 517         return 0;
 518 }
 519
 520 static int notify_brn(void)
 521 {
 522         /* returns the *previous* brightness, or -1 */
 523         struct backlight_device *bd = eeepc_backlight_device;
 524         if (bd) {
 525                 int old = bd->props.brightness;
 526                 bd->props.brightness = read_brightness(bd);
 527                 return old;
 528         }
 529         return -1;
 530 }
 531
 532 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 533 {
 534         enum rfkill_state state;
 535         struct pci_dev *dev;
 536         struct pci_bus *bus = pci_find_bus(0, 1);
 537
 538         if (event != ACPI_NOTIFY_BUS_CHECK)
 539                 return;
 540
 541         if (!bus) {
 542                 printk(EEEPC_WARNING "Unable to find PCI bus 1?\n");
 543                 return;
 544         }
 545
 546         eeepc_wlan_rfkill_state(ehotk->eeepc_wlan_rfkill, &state);
 547
 548         if (state == RFKILL_STATE_UNBLOCKED) {
 549                 dev = pci_get_slot(bus, 0);
 550                 if (dev) {
 551                         /* Device already present */
 552                         pci_dev_put(dev);
 553                         return;
 554                 }
 555                 dev = pci_scan_single_device(bus, 0);
 556                 if (dev) {
 557                         pci_bus_assign_resources(bus);
 558                         if (pci_bus_add_device(dev))
 559                                 printk(EEEPC_ERR "Unable to hotplug wifi\n");
 560                 }
 561         } else {
 562                 dev = pci_get_slot(bus, 0);
 563                 if (dev) {
 564                         pci_remove_bus_device(dev);
 565                         pci_dev_put(dev);
 566                 }
 567         }
 568
 569         rfkill_force_state(ehotk->eeepc_wlan_rfkill, state);
 570 }
 571
 572 static void eeepc_hotk_notify(acpi_handle handle, u32 event, void *data)
 573 {
 574         static struct key_entry *key;
 575         u16 count;
 576         int brn = -ENODEV;
 577
 578         if (!ehotk)
 579                 return;
 580         if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX)
 581                 brn = notify_brn();
 582         count = ehotk->event_count[event % 128]++;
 583         acpi_bus_generate_proc_event(ehotk->device, event, count);
 584         acpi_bus_generate_netlink_event(ehotk->device->pnp.device_class,
 585                                         dev_name(&ehotk->device->dev), event,
 586                                         count);
 587         if (ehotk->inputdev) {
 588                 if (brn != -ENODEV) {
 589                         /* brightness-change events need special
 590                          * handling for conversion to key events
 591                          */
 592                         if (brn < 0)
 593                                 brn = event;
 594                         else
 595                                 brn += NOTIFY_BRN_MIN;
 596                         if (event < brn)
 597                                 event = NOTIFY_BRN_MIN; /* brightness down */
 598                         else if (event > brn)
 599                                 event = NOTIFY_BRN_MIN + 2; /* ... up */
 600                         else
 601                                 event = NOTIFY_BRN_MIN + 1; /* ... unchanged */
 602                 }
 603                 key = eepc_get_entry_by_scancode(event);
 604                 if (key) {
 605                         switch (key->type) {
 606                         case KE_KEY:
 607                                 input_report_key(ehotk->inputdev, key->keycode,
 608                                                  1);
 609                                 input_sync(ehotk->inputdev);
 610                                 input_report_key(ehotk->inputdev, key->keycode,
 611                                                  0);
 612                                 input_sync(ehotk->inputdev);
 613                                 break;
 614                         }
 615                 }
 616         }
 617 }
 618
 619 static int eeepc_register_rfkill_notifier(char *node)
 620 {
 621         acpi_status status = AE_OK;
 622         acpi_handle handle;
 623
 624         status = acpi_get_handle(NULL, node, &handle);
 625
 626         if (ACPI_SUCCESS(status)) {
 627                 status = acpi_install_notify_handler(handle,
 628                                                      ACPI_SYSTEM_NOTIFY,
 629                                                      eeepc_rfkill_notify,
 630                                                      NULL);
 631                 if (ACPI_FAILURE(status))
 632                         printk(EEEPC_WARNING
 633                                "Failed to register notify on %s\n", node);
 634         } else
 635                 return -ENODEV;
 636
 637         return 0;
 638 }
 639
 640 static void eeepc_unregister_rfkill_notifier(char *node)
 641 {
 642         acpi_status status = AE_OK;
 643         acpi_handle handle;
 644
 645         status = acpi_get_handle(NULL, node, &handle);
 646
 647         if (ACPI_SUCCESS(status)) {
 648                 status = acpi_remove_notify_handler(handle,
 649                                                      ACPI_SYSTEM_NOTIFY,
 650                                                      eeepc_rfkill_notify);
 651                 if (ACPI_FAILURE(status))
 652                         printk(EEEPC_ERR
 653                                "Error removing rfkill notify handler %s\n",
 654                                 node);
 655         }
 656 }
 657
 658 static int eeepc_hotk_add(struct acpi_device *device)
 659 {
 660         acpi_status status = AE_OK;
 661         int result;
 662
 663         if (!device)
 664                  return -EINVAL;
 665         printk(EEEPC_NOTICE EEEPC_HOTK_NAME "\n");
 666         ehotk = kzalloc(sizeof(struct eeepc_hotk), GFP_KERNEL);
 667         if (!ehotk)
 668                 return -ENOMEM;
 669         ehotk->init_flag = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
 670         ehotk->handle = device->handle;
 671         strcpy(acpi_device_name(device), EEEPC_HOTK_DEVICE_NAME);
 672         strcpy(acpi_device_class(device), EEEPC_HOTK_CLASS);
 673         device->driver_data = ehotk;
 674         ehotk->device = device;
 675         result = eeepc_hotk_check();
 676         if (result)
 677                 goto ehotk_fail;
 678         status = acpi_install_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 679                                              eeepc_hotk_notify, ehotk);
 680         if (ACPI_FAILURE(status))
 681                 printk(EEEPC_ERR "Error installing notify handler\n");
 682
 683         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P6");
 684         eeepc_register_rfkill_notifier("\\_SB.PCI0.P0P7");
 685
 686         if (get_acpi(CM_ASL_WLAN) != -1) {
 687                 ehotk->eeepc_wlan_rfkill = rfkill_allocate(&device->dev,
 688                                                            RFKILL_TYPE_WLAN);
 689
 690                 if (!ehotk->eeepc_wlan_rfkill)
 691                         goto wlan_fail;
 692
 693                 ehotk->eeepc_wlan_rfkill->name = "eeepc-wlan";
 694                 ehotk->eeepc_wlan_rfkill->toggle_radio = eeepc_wlan_rfkill_set;
 695                 ehotk->eeepc_wlan_rfkill->get_state = eeepc_wlan_rfkill_state;
 696                 if (get_acpi(CM_ASL_WLAN) == 1) {
 697                         ehotk->eeepc_wlan_rfkill->state =
 698                                 RFKILL_STATE_UNBLOCKED;
 699                         rfkill_set_default(RFKILL_TYPE_WLAN,
 700                                            RFKILL_STATE_UNBLOCKED);
 701                 } else {
 702                         ehotk->eeepc_wlan_rfkill->state =
 703                                 RFKILL_STATE_SOFT_BLOCKED;
 704                         rfkill_set_default(RFKILL_TYPE_WLAN,
 705                                            RFKILL_STATE_SOFT_BLOCKED);
 706                 }
 707                 result = rfkill_register(ehotk->eeepc_wlan_rfkill);
 708                 if (result)
 709                         goto wlan_fail;
 710         }
 711
 712         if (get_acpi(CM_ASL_BLUETOOTH) != -1) {
 713                 ehotk->eeepc_bluetooth_rfkill =
 714                         rfkill_allocate(&device->dev, RFKILL_TYPE_BLUETOOTH);
 715
 716                 if (!ehotk->eeepc_bluetooth_rfkill)
 717                         goto bluetooth_fail;
 718
 719                 ehotk->eeepc_bluetooth_rfkill->name = "eeepc-bluetooth";
 720                 ehotk->eeepc_bluetooth_rfkill->toggle_radio =
 721                         eeepc_bluetooth_rfkill_set;
 722                 ehotk->eeepc_bluetooth_rfkill->get_state =
 723                         eeepc_bluetooth_rfkill_state;
 724                 if (get_acpi(CM_ASL_BLUETOOTH) == 1) {
 725                         ehotk->eeepc_bluetooth_rfkill->state =
 726                                 RFKILL_STATE_UNBLOCKED;
 727                         rfkill_set_default(RFKILL_TYPE_BLUETOOTH,
 728                                            RFKILL_STATE_UNBLOCKED);
 729                 } else {
 730                         ehotk->eeepc_bluetooth_rfkill->state =
 731                                 RFKILL_STATE_SOFT_BLOCKED;
 732                         rfkill_set_default(RFKILL_TYPE_BLUETOOTH,
 733                                            RFKILL_STATE_SOFT_BLOCKED);
 734                 }
 735
 736                 result = rfkill_register(ehotk->eeepc_bluetooth_rfkill);
 737                 if (result)
 738                         goto bluetooth_fail;
 739         }
 740
 741         return 0;
 742
 743  bluetooth_fail:
 744         if (ehotk->eeepc_bluetooth_rfkill)
 745                 rfkill_free(ehotk->eeepc_bluetooth_rfkill);
 746         rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 747         ehotk->eeepc_wlan_rfkill = NULL;
 748  wlan_fail:
 749         if (ehotk->eeepc_wlan_rfkill)
 750                 rfkill_free(ehotk->eeepc_wlan_rfkill);
 751         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 752         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 753  ehotk_fail:
 754         kfree(ehotk);
 755         ehotk = NULL;
 756
 757         return result;
 758 }
 759
 760 static int eeepc_hotk_remove(struct acpi_device *device, int type)
 761 {
 762         acpi_status status = 0;
 763
 764         if (!device || !acpi_driver_data(device))
 765                  return -EINVAL;
 766         status = acpi_remove_notify_handler(ehotk->handle, ACPI_SYSTEM_NOTIFY,
 767                                             eeepc_hotk_notify);
 768         if (ACPI_FAILURE(status))
 769                 printk(EEEPC_ERR "Error removing notify handler\n");
 770
 771         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P6");
 772         eeepc_unregister_rfkill_notifier("\\_SB.PCI0.P0P7");
 773
 774         kfree(ehotk);
 775         return 0;
 776 }
 777
 778 /*
 779  * Hwmon
 780  */
 781 static int eeepc_get_fan_pwm(void)
 782 {
 783         int value = 0;
 784
 785         read_acpi_int(NULL, EEEPC_EC_FAN_PWM, &value);
 786         value = value * 255 / 100;
 787         return (value);
 788 }
 789
 790 static void eeepc_set_fan_pwm(int value)
 791 {
 792         value = SENSORS_LIMIT(value, 0, 255);
 793         value = value * 100 / 255;
 794         ec_write(EEEPC_EC_SC02, value);
 795 }
 796
 797 static int eeepc_get_fan_rpm(void)
 798 {
 799         int high = 0;
 800         int low = 0;
 801
 802         read_acpi_int(NULL, EEEPC_EC_FAN_HRPM, &high);
 803         read_acpi_int(NULL, EEEPC_EC_FAN_LRPM, &low);
 804         return (high << 8 | low);
 805 }
 806
 807 static int eeepc_get_fan_ctrl(void)
 808 {
 809         int value = 0;
 810
 811         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 812         return ((value & 0x02 ? 1 : 0));
 813 }
 814
 815 static void eeepc_set_fan_ctrl(int manual)
 816 {
 817         int value = 0;
 818
 819         read_acpi_int(NULL, EEEPC_EC_FAN_CTRL, &value);
 820         if (manual)
 821                 value |= 0x02;
 822         else
 823                 value &= ~0x02;
 824         ec_write(EEEPC_EC_SFB3, value);
 825 }
 826
 827 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
 828 {
 829         int rv, value;
 830
 831         rv = parse_arg(buf, count, &value);
 832         if (rv > 0)
 833                 set(value);
 834         return rv;
 835 }
 836
 837 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
 838 {
 839         return sprintf(buf, "%d\n", get());
 840 }
 841
 842 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get)              \
 843         static ssize_t show_##_name(struct device *dev,                 \
 844                                     struct device_attribute *attr,      \
 845                                     char *buf)                          \
 846         {                                                               \
 847                 return show_sys_hwmon(_set, buf);                       \
 848         }                                                               \
 849         static ssize_t store_##_name(struct device *dev,                \
 850                                      struct device_attribute *attr,     \
 851                                      const char *buf, size_t count)     \
 852         {                                                               \
 853                 return store_sys_hwmon(_get, buf, count);               \
 854         }                                                               \
 855         static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
 856
 857 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
 858 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
 859                          eeepc_get_fan_pwm, eeepc_set_fan_pwm);
 860 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
 861                          eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
 862
 863 static ssize_t
 864 show_name(struct device *dev, struct device_attribute *attr, char *buf)
 865 {
 866         return sprintf(buf, "eeepc\n");
 867 }
 868 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
 869
 870 static struct attribute *hwmon_attributes[] = {
 871         &sensor_dev_attr_pwm1.dev_attr.attr,
 872         &sensor_dev_attr_fan1_input.dev_attr.attr,
 873         &sensor_dev_attr_pwm1_enable.dev_attr.attr,
 874         &sensor_dev_attr_name.dev_attr.attr,
 875         NULL
 876 };
 877
 878 static struct attribute_group hwmon_attribute_group = {
 879         .attrs = hwmon_attributes
 880 };
 881
 882 /*
 883  * exit/init
 884  */
 885 static void eeepc_backlight_exit(void)
 886 {
 887         if (eeepc_backlight_device)
 888                 backlight_device_unregister(eeepc_backlight_device);
 889         eeepc_backlight_device = NULL;
 890 }
 891
 892 static void eeepc_rfkill_exit(void)
 893 {
 894         if (ehotk->eeepc_wlan_rfkill)
 895                 rfkill_unregister(ehotk->eeepc_wlan_rfkill);
 896         if (ehotk->eeepc_bluetooth_rfkill)
 897                 rfkill_unregister(ehotk->eeepc_bluetooth_rfkill);
 898 }
 899
 900 static void eeepc_input_exit(void)
 901 {
 902         if (ehotk->inputdev)
 903                 input_unregister_device(ehotk->inputdev);
 904 }
 905
 906 static void eeepc_hwmon_exit(void)
 907 {
 908         struct device *hwmon;
 909
 910         hwmon = eeepc_hwmon_device;
 911         if (!hwmon)
 912                 return ;
 913         sysfs_remove_group(&hwmon->kobj,
 914                            &hwmon_attribute_group);
 915         hwmon_device_unregister(hwmon);
 916         eeepc_hwmon_device = NULL;
 917 }
 918
 919 static void __exit eeepc_laptop_exit(void)
 920 {
 921         eeepc_backlight_exit();
 922         eeepc_rfkill_exit();
 923         eeepc_input_exit();
 924         eeepc_hwmon_exit();
 925         acpi_bus_unregister_driver(&eeepc_hotk_driver);
 926         sysfs_remove_group(&platform_device->dev.kobj,
 927                            &platform_attribute_group);
 928         platform_device_unregister(platform_device);
 929         platform_driver_unregister(&platform_driver);
 930 }
 931
 932 static int eeepc_backlight_init(struct device *dev)
 933 {
 934         struct backlight_device *bd;
 935
 936         bd = backlight_device_register(EEEPC_HOTK_FILE, dev,
 937                                        NULL, &eeepcbl_ops);
 938         if (IS_ERR(bd)) {
 939                 printk(EEEPC_ERR
 940                        "Could not register eeepc backlight device\n");
 941                 eeepc_backlight_device = NULL;
 942                 return PTR_ERR(bd);
 943         }
 944         eeepc_backlight_device = bd;
 945         bd->props.max_brightness = 15;
 946         bd->props.brightness = read_brightness(NULL);
 947         bd->props.power = FB_BLANK_UNBLANK;
 948         backlight_update_status(bd);
 949         return 0;
 950 }
 951
 952 static int eeepc_hwmon_init(struct device *dev)
 953 {
 954         struct device *hwmon;
 955         int result;
 956
 957         hwmon = hwmon_device_register(dev);
 958         if (IS_ERR(hwmon)) {
 959                 printk(EEEPC_ERR
 960                        "Could not register eeepc hwmon device\n");
 961                 eeepc_hwmon_device = NULL;
 962                 return PTR_ERR(hwmon);
 963         }
 964         eeepc_hwmon_device = hwmon;
 965         result = sysfs_create_group(&hwmon->kobj,
 966                                     &hwmon_attribute_group);
 967         if (result)
 968                 eeepc_hwmon_exit();
 969         return result;
 970 }
 971
 972 static int __init eeepc_laptop_init(void)
 973 {
 974         struct device *dev;
 975         int result;
 976
 977         if (acpi_disabled)
 978                 return -ENODEV;
 979         result = acpi_bus_register_driver(&eeepc_hotk_driver);
 980         if (result < 0)
 981                 return result;
 982         if (!ehotk) {
 983                 acpi_bus_unregister_driver(&eeepc_hotk_driver);
 984                 return -ENODEV;
 985         }
 986         dev = acpi_get_physical_device(ehotk->device->handle);
 987
 988         if (!acpi_video_backlight_support()) {
 989                 result = eeepc_backlight_init(dev);
 990                 if (result)
 991                         goto fail_backlight;
 992         } else
 993                 printk(EEEPC_INFO "Backlight controlled by ACPI video "
 994                        "driver\n");
 995
 996         result = eeepc_hwmon_init(dev);
 997         if (result)
 998                 goto fail_hwmon;
 999         /* Register platform stuff */
1000         result = platform_driver_register(&platform_driver);
1001         if (result)
1002                 goto fail_platform_driver;
1003         platform_device = platform_device_alloc(EEEPC_HOTK_FILE, -1);
1004         if (!platform_device) {
1005                 result = -ENOMEM;
1006                 goto fail_platform_device1;
1007         }
1008         result = platform_device_add(platform_device);
1009         if (result)
1010                 goto fail_platform_device2;
1011         result = sysfs_create_group(&platform_device->dev.kobj,
1012                                     &platform_attribute_group);
1013         if (result)
1014                 goto fail_sysfs;
1015         return 0;
1016 fail_sysfs:
1017         platform_device_del(platform_device);
1018 fail_platform_device2:
1019         platform_device_put(platform_device);
1020 fail_platform_device1:
1021         platform_driver_unregister(&platform_driver);
1022 fail_platform_driver:
1023         eeepc_hwmon_exit();
1024 fail_hwmon:
1025         eeepc_backlight_exit();
1026 fail_backlight:
1027         eeepc_input_exit();
1028         eeepc_rfkill_exit();
1029         return result;
1030 }
1031
1032 module_init(eeepc_laptop_init);
1033 module_exit(eeepc_laptop_exit);