drivers/platform/x86/eeepc-laptop.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  eeepc-laptop.c - Asus Eee PC extras
   4  *
   5  *  Based on asus_acpi.c as patched for the Eee PC by Asus:
   6  *  ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
   7  *  Based on eee.c from eeepc-linux
   8  */
   9
  10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  11
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <linux/init.h>
  15 #include <linux/types.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/backlight.h>
  18 #include <linux/hwmon.h>
  19 #include <linux/hwmon-sysfs.h>
  20 #include <linux/slab.h>
  21 #include <linux/acpi.h>
  22 #include <linux/uaccess.h>
  23 #include <linux/input.h>
  24 #include <linux/input/sparse-keymap.h>
  25 #include <linux/rfkill.h>
  26 #include <linux/pci.h>
  27 #include <linux/pci_hotplug.h>
  28 #include <linux/sysfs.h>
  29 #include <linux/leds.h>
  30 #include <linux/dmi.h>
  31 #include <acpi/video.h>
  32
  33 #define EEEPC_LAPTOP_VERSION    "0.1"
  34 #define EEEPC_LAPTOP_NAME       "Eee PC Hotkey Driver"
  35 #define EEEPC_LAPTOP_FILE       "eeepc"
  36
  37 #define EEEPC_ACPI_CLASS        "hotkey"
  38 #define EEEPC_ACPI_DEVICE_NAME  "Hotkey"
  39 #define EEEPC_ACPI_HID          "ASUS010"
  40
  41 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
  42 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
  43 MODULE_LICENSE("GPL");
  44
  45 static bool hotplug_disabled;
  46
  47 module_param(hotplug_disabled, bool, 0444);
  48 MODULE_PARM_DESC(hotplug_disabled,
  49                  "Disable hotplug for wireless device. "
  50                  "If your laptop need that, please report to "
  51                  "[email protected].");
  52
  53 /*
  54  * Definitions for Asus EeePC
  55  */
  56 #define NOTIFY_BRN_MIN  0x20
  57 #define NOTIFY_BRN_MAX  0x2f
  58
  59 enum {
  60         DISABLE_ASL_WLAN = 0x0001,
  61         DISABLE_ASL_BLUETOOTH = 0x0002,
  62         DISABLE_ASL_IRDA = 0x0004,
  63         DISABLE_ASL_CAMERA = 0x0008,
  64         DISABLE_ASL_TV = 0x0010,
  65         DISABLE_ASL_GPS = 0x0020,
  66         DISABLE_ASL_DISPLAYSWITCH = 0x0040,
  67         DISABLE_ASL_MODEM = 0x0080,
  68         DISABLE_ASL_CARDREADER = 0x0100,
  69         DISABLE_ASL_3G = 0x0200,
  70         DISABLE_ASL_WIMAX = 0x0400,
  71         DISABLE_ASL_HWCF = 0x0800
  72 };
  73
  74 enum {
  75         CM_ASL_WLAN = 0,
  76         CM_ASL_BLUETOOTH,
  77         CM_ASL_IRDA,
  78         CM_ASL_1394,
  79         CM_ASL_CAMERA,
  80         CM_ASL_TV,
  81         CM_ASL_GPS,
  82         CM_ASL_DVDROM,
  83         CM_ASL_DISPLAYSWITCH,
  84         CM_ASL_PANELBRIGHT,
  85         CM_ASL_BIOSFLASH,
  86         CM_ASL_ACPIFLASH,
  87         CM_ASL_CPUFV,
  88         CM_ASL_CPUTEMPERATURE,
  89         CM_ASL_FANCPU,
  90         CM_ASL_FANCHASSIS,
  91         CM_ASL_USBPORT1,
  92         CM_ASL_USBPORT2,
  93         CM_ASL_USBPORT3,
  94         CM_ASL_MODEM,
  95         CM_ASL_CARDREADER,
  96         CM_ASL_3G,
  97         CM_ASL_WIMAX,
  98         CM_ASL_HWCF,
  99         CM_ASL_LID,
 100         CM_ASL_TYPE,
 101         CM_ASL_PANELPOWER,      /*P901*/
 102         CM_ASL_TPD
 103 };
 104
 105 static const char *cm_getv[] = {
 106         "WLDG", "BTHG", NULL, NULL,
 107         "CAMG", NULL, NULL, NULL,
 108         NULL, "PBLG", NULL, NULL,
 109         "CFVG", NULL, NULL, NULL,
 110         "USBG", NULL, NULL, "MODG",
 111         "CRDG", "M3GG", "WIMG", "HWCF",
 112         "LIDG", "TYPE", "PBPG", "TPDG"
 113 };
 114
 115 static const char *cm_setv[] = {
 116         "WLDS", "BTHS", NULL, NULL,
 117         "CAMS", NULL, NULL, NULL,
 118         "SDSP", "PBLS", "HDPS", NULL,
 119         "CFVS", NULL, NULL, NULL,
 120         "USBG", NULL, NULL, "MODS",
 121         "CRDS", "M3GS", "WIMS", NULL,
 122         NULL, NULL, "PBPS", "TPDS"
 123 };
 124
 125 static const struct key_entry eeepc_keymap[] = {
 126         { KE_KEY, 0x10, { KEY_WLAN } },
 127         { KE_KEY, 0x11, { KEY_WLAN } },
 128         { KE_KEY, 0x12, { KEY_PROG1 } },
 129         { KE_KEY, 0x13, { KEY_MUTE } },
 130         { KE_KEY, 0x14, { KEY_VOLUMEDOWN } },
 131         { KE_KEY, 0x15, { KEY_VOLUMEUP } },
 132         { KE_KEY, 0x16, { KEY_DISPLAY_OFF } },
 133         { KE_KEY, 0x1a, { KEY_COFFEE } },
 134         { KE_KEY, 0x1b, { KEY_ZOOM } },
 135         { KE_KEY, 0x1c, { KEY_PROG2 } },
 136         { KE_KEY, 0x1d, { KEY_PROG3 } },
 137         { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } },
 138         { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } },
 139         { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
 140         { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
 141         { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
 142         { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
 143         { KE_KEY, 0x38, { KEY_F14 } },
 144         { KE_IGNORE, 0x50, { KEY_RESERVED } }, /* AC plugged */
 145         { KE_IGNORE, 0x51, { KEY_RESERVED } }, /* AC unplugged */
 146         { KE_END, 0 },
 147 };
 148
 149 /*
 150  * This is the main structure, we can use it to store useful information
 151  */
 152 struct eeepc_laptop {
 153         acpi_handle handle;             /* the handle of the acpi device */
 154         u32 cm_supported;               /* the control methods supported
 155                                            by this BIOS */
 156         bool cpufv_disabled;
 157         bool hotplug_disabled;
 158         u16 event_count[128];           /* count for each event */
 159
 160         struct platform_device *platform_device;
 161         struct acpi_device *device;             /* the device we are in */
 162         struct backlight_device *backlight_device;
 163
 164         struct input_dev *inputdev;
 165
 166         struct rfkill *wlan_rfkill;
 167         struct rfkill *bluetooth_rfkill;
 168         struct rfkill *wwan3g_rfkill;
 169         struct rfkill *wimax_rfkill;
 170
 171         struct hotplug_slot hotplug_slot;
 172         struct mutex hotplug_lock;
 173
 174         struct led_classdev tpd_led;
 175         int tpd_led_wk;
 176         struct workqueue_struct *led_workqueue;
 177         struct work_struct tpd_led_work;
 178 };
 179
 180 /*
 181  * ACPI Helpers
 182  */
 183 static int write_acpi_int(acpi_handle handle, const char *method, int val)
 184 {
 185         acpi_status status;
 186
 187         status = acpi_execute_simple_method(handle, (char *)method, val);
 188
 189         return (status == AE_OK ? 0 : -1);
 190 }
 191
 192 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
 193 {
 194         acpi_status status;
 195         unsigned long long result;
 196
 197         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
 198         if (ACPI_FAILURE(status)) {
 199                 *val = -1;
 200                 return -1;
 201         } else {
 202                 *val = result;
 203                 return 0;
 204         }
 205 }
 206
 207 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
 208 {
 209         const char *method = cm_setv[cm];
 210
 211         if (method == NULL)
 212                 return -ENODEV;
 213         if ((eeepc->cm_supported & (0x1 << cm)) == 0)
 214                 return -ENODEV;
 215
 216         if (write_acpi_int(eeepc->handle, method, value))
 217                 pr_warn("Error writing %s\n", method);
 218         return 0;
 219 }
 220
 221 static int get_acpi(struct eeepc_laptop *eeepc, int cm)
 222 {
 223         const char *method = cm_getv[cm];
 224         int value;
 225
 226         if (method == NULL)
 227                 return -ENODEV;
 228         if ((eeepc->cm_supported & (0x1 << cm)) == 0)
 229                 return -ENODEV;
 230
 231         if (read_acpi_int(eeepc->handle, method, &value))
 232                 pr_warn("Error reading %s\n", method);
 233         return value;
 234 }
 235
 236 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
 237                               acpi_handle *handle)
 238 {
 239         const char *method = cm_setv[cm];
 240         acpi_status status;
 241
 242         if (method == NULL)
 243                 return -ENODEV;
 244         if ((eeepc->cm_supported & (0x1 << cm)) == 0)
 245                 return -ENODEV;
 246
 247         status = acpi_get_handle(eeepc->handle, (char *)method,
 248                                  handle);
 249         if (status != AE_OK) {
 250                 pr_warn("Error finding %s\n", method);
 251                 return -ENODEV;
 252         }
 253         return 0;
 254 }
 255
 256
 257 /*
 258  * Sys helpers
 259  */
 260 static int parse_arg(const char *buf, int *val)
 261 {
 262         if (sscanf(buf, "%i", val) != 1)
 263                 return -EINVAL;
 264         return 0;
 265 }
 266
 267 static ssize_t store_sys_acpi(struct device *dev, int cm,
 268                               const char *buf, size_t count)
 269 {
 270         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 271         int rv, value;
 272
 273         rv = parse_arg(buf, &value);
 274         if (rv < 0)
 275                 return rv;
 276         rv = set_acpi(eeepc, cm, value);
 277         if (rv < 0)
 278                 return -EIO;
 279         return count;
 280 }
 281
 282 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
 283 {
 284         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 285         int value = get_acpi(eeepc, cm);
 286
 287         if (value < 0)
 288                 return -EIO;
 289         return sysfs_emit(buf, "%d\n", value);
 290 }
 291
 292 #define EEEPC_ACPI_SHOW_FUNC(_name, _cm)                                \
 293         static ssize_t _name##_show(struct device *dev,                 \
 294                                     struct device_attribute *attr,      \
 295                                     char *buf)                          \
 296         {                                                               \
 297                 return show_sys_acpi(dev, _cm, buf);                    \
 298         }
 299
 300 #define EEEPC_ACPI_STORE_FUNC(_name, _cm)                               \
 301         static ssize_t _name##_store(struct device *dev,                \
 302                                      struct device_attribute *attr,     \
 303                                      const char *buf, size_t count)     \
 304         {                                                               \
 305                 return store_sys_acpi(dev, _cm, buf, count);            \
 306         }
 307
 308 #define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm)                         \
 309         EEEPC_ACPI_SHOW_FUNC(_name, _cm)                                \
 310         EEEPC_ACPI_STORE_FUNC(_name, _cm)                               \
 311         static DEVICE_ATTR_RW(_name)
 312
 313 #define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm)                         \
 314         EEEPC_ACPI_STORE_FUNC(_name, _cm)                               \
 315         static DEVICE_ATTR_WO(_name)
 316
 317 EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA);
 318 EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER);
 319 EEEPC_CREATE_DEVICE_ATTR_WO(disp, CM_ASL_DISPLAYSWITCH);
 320
 321 struct eeepc_cpufv {
 322         int num;
 323         int cur;
 324 };
 325
 326 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
 327 {
 328         c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
 329         if (c->cur < 0)
 330                 return -ENODEV;
 331
 332         c->num = (c->cur >> 8) & 0xff;
 333         c->cur &= 0xff;
 334         if (c->num == 0 || c->num > 12)
 335                 return -ENODEV;
 336         return 0;
 337 }
 338
 339 static ssize_t available_cpufv_show(struct device *dev,
 340                                     struct device_attribute *attr,
 341                                     char *buf)
 342 {
 343         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 344         struct eeepc_cpufv c;
 345         int i;
 346         ssize_t len = 0;
 347
 348         if (get_cpufv(eeepc, &c))
 349                 return -ENODEV;
 350         for (i = 0; i < c.num; i++)
 351                 len += sprintf(buf + len, "%d ", i);
 352         len += sprintf(buf + len, "\n");
 353         return len;
 354 }
 355
 356 static ssize_t cpufv_show(struct device *dev,
 357                           struct device_attribute *attr,
 358                           char *buf)
 359 {
 360         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 361         struct eeepc_cpufv c;
 362
 363         if (get_cpufv(eeepc, &c))
 364                 return -ENODEV;
 365         return sysfs_emit(buf, "%#x\n", (c.num << 8) | c.cur);
 366 }
 367
 368 static ssize_t cpufv_store(struct device *dev,
 369                            struct device_attribute *attr,
 370                            const char *buf, size_t count)
 371 {
 372         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 373         struct eeepc_cpufv c;
 374         int rv, value;
 375
 376         if (eeepc->cpufv_disabled)
 377                 return -EPERM;
 378         if (get_cpufv(eeepc, &c))
 379                 return -ENODEV;
 380         rv = parse_arg(buf, &value);
 381         if (rv < 0)
 382                 return rv;
 383         if (value < 0 || value >= c.num)
 384                 return -EINVAL;
 385         rv = set_acpi(eeepc, CM_ASL_CPUFV, value);
 386         if (rv)
 387                 return rv;
 388         return count;
 389 }
 390
 391 static ssize_t cpufv_disabled_show(struct device *dev,
 392                           struct device_attribute *attr,
 393                           char *buf)
 394 {
 395         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 396
 397         return sysfs_emit(buf, "%d\n", eeepc->cpufv_disabled);
 398 }
 399
 400 static ssize_t cpufv_disabled_store(struct device *dev,
 401                            struct device_attribute *attr,
 402                            const char *buf, size_t count)
 403 {
 404         struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
 405         int rv, value;
 406
 407         rv = parse_arg(buf, &value);
 408         if (rv < 0)
 409                 return rv;
 410
 411         switch (value) {
 412         case 0:
 413                 if (eeepc->cpufv_disabled)
 414                         pr_warn("cpufv enabled (not officially supported on this model)\n");
 415                 eeepc->cpufv_disabled = false;
 416                 return count;
 417         case 1:
 418                 return -EPERM;
 419         default:
 420                 return -EINVAL;
 421         }
 422 }
 423
 424
 425 static DEVICE_ATTR_RW(cpufv);
 426 static DEVICE_ATTR_RO(available_cpufv);
 427 static DEVICE_ATTR_RW(cpufv_disabled);
 428
 429 static struct attribute *platform_attributes[] = {
 430         &dev_attr_camera.attr,
 431         &dev_attr_cardr.attr,
 432         &dev_attr_disp.attr,
 433         &dev_attr_cpufv.attr,
 434         &dev_attr_available_cpufv.attr,
 435         &dev_attr_cpufv_disabled.attr,
 436         NULL
 437 };
 438
 439 static const struct attribute_group platform_attribute_group = {
 440         .attrs = platform_attributes
 441 };
 442
 443 static int eeepc_platform_init(struct eeepc_laptop *eeepc)
 444 {
 445         int result;
 446
 447         eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, PLATFORM_DEVID_NONE);
 448         if (!eeepc->platform_device)
 449                 return -ENOMEM;
 450         platform_set_drvdata(eeepc->platform_device, eeepc);
 451
 452         result = platform_device_add(eeepc->platform_device);
 453         if (result)
 454                 goto fail_platform_device;
 455
 456         result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
 457                                     &platform_attribute_group);
 458         if (result)
 459                 goto fail_sysfs;
 460         return 0;
 461
 462 fail_sysfs:
 463         platform_device_del(eeepc->platform_device);
 464 fail_platform_device:
 465         platform_device_put(eeepc->platform_device);
 466         return result;
 467 }
 468
 469 static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
 470 {
 471         sysfs_remove_group(&eeepc->platform_device->dev.kobj,
 472                            &platform_attribute_group);
 473         platform_device_unregister(eeepc->platform_device);
 474 }
 475
 476 /*
 477  * LEDs
 478  */
 479 /*
 480  * These functions actually update the LED's, and are called from a
 481  * workqueue. By doing this as separate work rather than when the LED
 482  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
 483  * potentially bad time, such as a timer interrupt.
 484  */
 485 static void tpd_led_update(struct work_struct *work)
 486 {
 487         struct eeepc_laptop *eeepc;
 488
 489         eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
 490
 491         set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
 492 }
 493
 494 static void tpd_led_set(struct led_classdev *led_cdev,
 495                         enum led_brightness value)
 496 {
 497         struct eeepc_laptop *eeepc;
 498
 499         eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
 500
 501         eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
 502         queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
 503 }
 504
 505 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
 506 {
 507         struct eeepc_laptop *eeepc;
 508
 509         eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
 510
 511         return get_acpi(eeepc, CM_ASL_TPD);
 512 }
 513
 514 static int eeepc_led_init(struct eeepc_laptop *eeepc)
 515 {
 516         int rv;
 517
 518         if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
 519                 return 0;
 520
 521         eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
 522         if (!eeepc->led_workqueue)
 523                 return -ENOMEM;
 524         INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
 525
 526         eeepc->tpd_led.name = "eeepc::touchpad";
 527         eeepc->tpd_led.brightness_set = tpd_led_set;
 528         if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
 529                 eeepc->tpd_led.brightness_get = tpd_led_get;
 530         eeepc->tpd_led.max_brightness = 1;
 531
 532         rv = led_classdev_register(&eeepc->platform_device->dev,
 533                                    &eeepc->tpd_led);
 534         if (rv) {
 535                 destroy_workqueue(eeepc->led_workqueue);
 536                 return rv;
 537         }
 538
 539         return 0;
 540 }
 541
 542 static void eeepc_led_exit(struct eeepc_laptop *eeepc)
 543 {
 544         led_classdev_unregister(&eeepc->tpd_led);
 545         if (eeepc->led_workqueue)
 546                 destroy_workqueue(eeepc->led_workqueue);
 547 }
 548
 549 /*
 550  * PCI hotplug (for wlan rfkill)
 551  */
 552 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
 553 {
 554         if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
 555                 return false;
 556         return true;
 557 }
 558
 559 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
 560 {
 561         struct pci_dev *port;
 562         struct pci_dev *dev;
 563         struct pci_bus *bus;
 564         bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
 565         bool absent;
 566         u32 l;
 567
 568         if (eeepc->wlan_rfkill)
 569                 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
 570
 571         mutex_lock(&eeepc->hotplug_lock);
 572         pci_lock_rescan_remove();
 573
 574         if (!eeepc->hotplug_slot.ops)
 575                 goto out_unlock;
 576
 577         port = acpi_get_pci_dev(handle);
 578         if (!port) {
 579                 pr_warn("Unable to find port\n");
 580                 goto out_unlock;
 581         }
 582
 583         bus = port->subordinate;
 584
 585         if (!bus) {
 586                 pr_warn("Unable to find PCI bus 1?\n");
 587                 goto out_put_dev;
 588         }
 589
 590         if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
 591                 pr_err("Unable to read PCI config space?\n");
 592                 goto out_put_dev;
 593         }
 594
 595         absent = (l == 0xffffffff);
 596
 597         if (blocked != absent) {
 598                 pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n",
 599                         blocked ? "blocked" : "unblocked",
 600                         absent ? "absent" : "present");
 601                 pr_warn("skipped wireless hotplug as probably inappropriate for this model\n");
 602                 goto out_put_dev;
 603         }
 604
 605         if (!blocked) {
 606                 dev = pci_get_slot(bus, 0);
 607                 if (dev) {
 608                         /* Device already present */
 609                         pci_dev_put(dev);
 610                         goto out_put_dev;
 611                 }
 612                 dev = pci_scan_single_device(bus, 0);
 613                 if (dev) {
 614                         pci_bus_assign_resources(bus);
 615                         pci_bus_add_device(dev);
 616                 }
 617         } else {
 618                 dev = pci_get_slot(bus, 0);
 619                 if (dev) {
 620                         pci_stop_and_remove_bus_device(dev);
 621                         pci_dev_put(dev);
 622                 }
 623         }
 624 out_put_dev:
 625         pci_dev_put(port);
 626
 627 out_unlock:
 628         pci_unlock_rescan_remove();
 629         mutex_unlock(&eeepc->hotplug_lock);
 630 }
 631
 632 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
 633 {
 634         acpi_status status = AE_OK;
 635         acpi_handle handle;
 636
 637         status = acpi_get_handle(NULL, node, &handle);
 638
 639         if (ACPI_SUCCESS(status))
 640                 eeepc_rfkill_hotplug(eeepc, handle);
 641 }
 642
 643 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
 644 {
 645         struct eeepc_laptop *eeepc = data;
 646
 647         if (event != ACPI_NOTIFY_BUS_CHECK)
 648                 return;
 649
 650         eeepc_rfkill_hotplug(eeepc, handle);
 651 }
 652
 653 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
 654                                           char *node)
 655 {
 656         acpi_status status;
 657         acpi_handle handle;
 658
 659         status = acpi_get_handle(NULL, node, &handle);
 660
 661         if (ACPI_FAILURE(status))
 662                 return -ENODEV;
 663
 664         status = acpi_install_notify_handler(handle,
 665                                              ACPI_SYSTEM_NOTIFY,
 666                                              eeepc_rfkill_notify,
 667                                              eeepc);
 668         if (ACPI_FAILURE(status))
 669                 pr_warn("Failed to register notify on %s\n", node);
 670
 671         /*
 672          * Refresh pci hotplug in case the rfkill state was
 673          * changed during setup.
 674          */
 675         eeepc_rfkill_hotplug(eeepc, handle);
 676         return 0;
 677 }
 678
 679 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
 680                                              char *node)
 681 {
 682         acpi_status status = AE_OK;
 683         acpi_handle handle;
 684
 685         status = acpi_get_handle(NULL, node, &handle);
 686
 687         if (ACPI_FAILURE(status))
 688                 return;
 689
 690         status = acpi_remove_notify_handler(handle,
 691                                              ACPI_SYSTEM_NOTIFY,
 692                                              eeepc_rfkill_notify);
 693         if (ACPI_FAILURE(status))
 694                 pr_err("Error removing rfkill notify handler %s\n",
 695                         node);
 696                 /*
 697                  * Refresh pci hotplug in case the rfkill
 698                  * state was changed after
 699                  * eeepc_unregister_rfkill_notifier()
 700                  */
 701         eeepc_rfkill_hotplug(eeepc, handle);
 702 }
 703
 704 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
 705                                     u8 *value)
 706 {
 707         struct eeepc_laptop *eeepc;
 708         int val;
 709
 710         eeepc = container_of(hotplug_slot, struct eeepc_laptop, hotplug_slot);
 711         val = get_acpi(eeepc, CM_ASL_WLAN);
 712
 713         if (val == 1 || val == 0)
 714                 *value = val;
 715         else
 716                 return -EINVAL;
 717
 718         return 0;
 719 }
 720
 721 static const struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
 722         .get_adapter_status = eeepc_get_adapter_status,
 723         .get_power_status = eeepc_get_adapter_status,
 724 };
 725
 726 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
 727 {
 728         int ret = -ENOMEM;
 729         struct pci_bus *bus = pci_find_bus(0, 1);
 730
 731         if (!bus) {
 732                 pr_err("Unable to find wifi PCI bus\n");
 733                 return -ENODEV;
 734         }
 735
 736         eeepc->hotplug_slot.ops = &eeepc_hotplug_slot_ops;
 737
 738         ret = pci_hp_register(&eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
 739         if (ret) {
 740                 pr_err("Unable to register hotplug slot - %d\n", ret);
 741                 goto error_register;
 742         }
 743
 744         return 0;
 745
 746 error_register:
 747         eeepc->hotplug_slot.ops = NULL;
 748         return ret;
 749 }
 750
 751 /*
 752  * Rfkill devices
 753  */
 754 static int eeepc_rfkill_set(void *data, bool blocked)
 755 {
 756         acpi_handle handle = data;
 757
 758         return write_acpi_int(handle, NULL, !blocked);
 759 }
 760
 761 static const struct rfkill_ops eeepc_rfkill_ops = {
 762         .set_block = eeepc_rfkill_set,
 763 };
 764
 765 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
 766                             struct rfkill **rfkill,
 767                             const char *name,
 768                             enum rfkill_type type, int cm)
 769 {
 770         acpi_handle handle;
 771         int result;
 772
 773         result = acpi_setter_handle(eeepc, cm, &handle);
 774         if (result < 0)
 775                 return result;
 776
 777         *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
 778                                &eeepc_rfkill_ops, handle);
 779
 780         if (!*rfkill)
 781                 return -EINVAL;
 782
 783         rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
 784         result = rfkill_register(*rfkill);
 785         if (result) {
 786                 rfkill_destroy(*rfkill);
 787                 *rfkill = NULL;
 788                 return result;
 789         }
 790         return 0;
 791 }
 792
 793 static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
 794 static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
 795 static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
 796
 797 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
 798 {
 799         eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
 800         eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
 801         eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
 802         if (eeepc->wlan_rfkill) {
 803                 rfkill_unregister(eeepc->wlan_rfkill);
 804                 rfkill_destroy(eeepc->wlan_rfkill);
 805                 eeepc->wlan_rfkill = NULL;
 806         }
 807
 808         if (eeepc->hotplug_slot.ops)
 809                 pci_hp_deregister(&eeepc->hotplug_slot);
 810
 811         if (eeepc->bluetooth_rfkill) {
 812                 rfkill_unregister(eeepc->bluetooth_rfkill);
 813                 rfkill_destroy(eeepc->bluetooth_rfkill);
 814                 eeepc->bluetooth_rfkill = NULL;
 815         }
 816         if (eeepc->wwan3g_rfkill) {
 817                 rfkill_unregister(eeepc->wwan3g_rfkill);
 818                 rfkill_destroy(eeepc->wwan3g_rfkill);
 819                 eeepc->wwan3g_rfkill = NULL;
 820         }
 821         if (eeepc->wimax_rfkill) {
 822                 rfkill_unregister(eeepc->wimax_rfkill);
 823                 rfkill_destroy(eeepc->wimax_rfkill);
 824                 eeepc->wimax_rfkill = NULL;
 825         }
 826 }
 827
 828 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
 829 {
 830         int result = 0;
 831
 832         mutex_init(&eeepc->hotplug_lock);
 833
 834         result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
 835                                   "eeepc-wlan", RFKILL_TYPE_WLAN,
 836                                   CM_ASL_WLAN);
 837
 838         if (result && result != -ENODEV)
 839                 goto exit;
 840
 841         result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
 842                                   "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
 843                                   CM_ASL_BLUETOOTH);
 844
 845         if (result && result != -ENODEV)
 846                 goto exit;
 847
 848         result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
 849                                   "eeepc-wwan3g", RFKILL_TYPE_WWAN,
 850                                   CM_ASL_3G);
 851
 852         if (result && result != -ENODEV)
 853                 goto exit;
 854
 855         result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
 856                                   "eeepc-wimax", RFKILL_TYPE_WIMAX,
 857                                   CM_ASL_WIMAX);
 858
 859         if (result && result != -ENODEV)
 860                 goto exit;
 861
 862         if (eeepc->hotplug_disabled)
 863                 return 0;
 864
 865         result = eeepc_setup_pci_hotplug(eeepc);
 866         /*
 867          * If we get -EBUSY then something else is handling the PCI hotplug -
 868          * don't fail in this case
 869          */
 870         if (result == -EBUSY)
 871                 result = 0;
 872
 873         eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
 874         eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
 875         eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
 876
 877 exit:
 878         if (result && result != -ENODEV)
 879                 eeepc_rfkill_exit(eeepc);
 880         return result;
 881 }
 882
 883 /*
 884  * Platform driver - hibernate/resume callbacks
 885  */
 886 static int eeepc_hotk_thaw(struct device *device)
 887 {
 888         struct eeepc_laptop *eeepc = dev_get_drvdata(device);
 889
 890         if (eeepc->wlan_rfkill) {
 891                 int wlan;
 892
 893                 /*
 894                  * Work around bios bug - acpi _PTS turns off the wireless led
 895                  * during suspend.  Normally it restores it on resume, but
 896                  * we should kick it ourselves in case hibernation is aborted.
 897                  */
 898                 wlan = get_acpi(eeepc, CM_ASL_WLAN);
 899                 if (wlan >= 0)
 900                         set_acpi(eeepc, CM_ASL_WLAN, wlan);
 901         }
 902
 903         return 0;
 904 }
 905
 906 static int eeepc_hotk_restore(struct device *device)
 907 {
 908         struct eeepc_laptop *eeepc = dev_get_drvdata(device);
 909
 910         /* Refresh both wlan rfkill state and pci hotplug */
 911         if (eeepc->wlan_rfkill) {
 912                 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1);
 913                 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
 914                 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
 915         }
 916
 917         if (eeepc->bluetooth_rfkill)
 918                 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
 919                                     get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
 920         if (eeepc->wwan3g_rfkill)
 921                 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
 922                                     get_acpi(eeepc, CM_ASL_3G) != 1);
 923         if (eeepc->wimax_rfkill)
 924                 rfkill_set_sw_state(eeepc->wimax_rfkill,
 925                                     get_acpi(eeepc, CM_ASL_WIMAX) != 1);
 926
 927         return 0;
 928 }
 929
 930 static const struct dev_pm_ops eeepc_pm_ops = {
 931         .thaw = eeepc_hotk_thaw,
 932         .restore = eeepc_hotk_restore,
 933 };
 934
 935 static struct platform_driver platform_driver = {
 936         .driver = {
 937                 .name = EEEPC_LAPTOP_FILE,
 938                 .pm = &eeepc_pm_ops,
 939         }
 940 };
 941
 942 /*
 943  * Hwmon device
 944  */
 945
 946 #define EEEPC_EC_SC00      0x61
 947 #define EEEPC_EC_FAN_PWM   (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
 948 #define EEEPC_EC_FAN_HRPM  (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
 949 #define EEEPC_EC_FAN_LRPM  (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
 950
 951 #define EEEPC_EC_SFB0      0xD0
 952 #define EEEPC_EC_FAN_CTRL  (EEEPC_EC_SFB0 + 3) /* Byte containing SF25  */
 953
 954 static inline int eeepc_pwm_to_lmsensors(int value)
 955 {
 956         return value * 255 / 100;
 957 }
 958
 959 static inline int eeepc_lmsensors_to_pwm(int value)
 960 {
 961         value = clamp_val(value, 0, 255);
 962         return value * 100 / 255;
 963 }
 964
 965 static int eeepc_get_fan_pwm(void)
 966 {
 967         u8 value = 0;
 968
 969         ec_read(EEEPC_EC_FAN_PWM, &value);
 970         return eeepc_pwm_to_lmsensors(value);
 971 }
 972
 973 static void eeepc_set_fan_pwm(int value)
 974 {
 975         value = eeepc_lmsensors_to_pwm(value);
 976         ec_write(EEEPC_EC_FAN_PWM, value);
 977 }
 978
 979 static int eeepc_get_fan_rpm(void)
 980 {
 981         u8 high = 0;
 982         u8 low = 0;
 983
 984         ec_read(EEEPC_EC_FAN_HRPM, &high);
 985         ec_read(EEEPC_EC_FAN_LRPM, &low);
 986         return high << 8 | low;
 987 }
 988
 989 #define EEEPC_EC_FAN_CTRL_BIT   0x02
 990 #define EEEPC_FAN_CTRL_MANUAL   1
 991 #define EEEPC_FAN_CTRL_AUTO     2
 992
 993 static int eeepc_get_fan_ctrl(void)
 994 {
 995         u8 value = 0;
 996
 997         ec_read(EEEPC_EC_FAN_CTRL, &value);
 998         if (value & EEEPC_EC_FAN_CTRL_BIT)
 999                 return EEEPC_FAN_CTRL_MANUAL;
1000         else
1001                 return EEEPC_FAN_CTRL_AUTO;
1002 }
1003
1004 static void eeepc_set_fan_ctrl(int manual)
1005 {
1006         u8 value = 0;
1007
1008         ec_read(EEEPC_EC_FAN_CTRL, &value);
1009         if (manual == EEEPC_FAN_CTRL_MANUAL)
1010                 value |= EEEPC_EC_FAN_CTRL_BIT;
1011         else
1012                 value &= ~EEEPC_EC_FAN_CTRL_BIT;
1013         ec_write(EEEPC_EC_FAN_CTRL, value);
1014 }
1015
1016 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1017 {
1018         int rv, value;
1019
1020         rv = parse_arg(buf, &value);
1021         if (rv < 0)
1022                 return rv;
1023         set(value);
1024         return count;
1025 }
1026
1027 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1028 {
1029         return sysfs_emit(buf, "%d\n", get());
1030 }
1031
1032 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get)                             \
1033         static ssize_t _name##_show(struct device *dev,                 \
1034                                     struct device_attribute *attr,      \
1035                                     char *buf)                          \
1036         {                                                               \
1037                 return show_sys_hwmon(_get, buf);                       \
1038         }
1039
1040 #define EEEPC_SENSOR_STORE_FUNC(_name, _set)                            \
1041         static ssize_t _name##_store(struct device *dev,                \
1042                                      struct device_attribute *attr,     \
1043                                      const char *buf, size_t count)     \
1044         {                                                               \
1045                 return store_sys_hwmon(_set, buf, count);               \
1046         }
1047
1048 #define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set)                  \
1049         EEEPC_SENSOR_SHOW_FUNC(_name, _get)                             \
1050         EEEPC_SENSOR_STORE_FUNC(_name, _set)                            \
1051         static DEVICE_ATTR_RW(_name)
1052
1053 #define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get)                        \
1054         EEEPC_SENSOR_SHOW_FUNC(_name, _get)                             \
1055         static DEVICE_ATTR_RO(_name)
1056
1057 EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
1058 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
1059                             eeepc_set_fan_pwm);
1060 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
1061                             eeepc_set_fan_ctrl);
1062
1063 static struct attribute *hwmon_attrs[] = {
1064         &dev_attr_pwm1.attr,
1065         &dev_attr_fan1_input.attr,
1066         &dev_attr_pwm1_enable.attr,
1067         NULL
1068 };
1069 ATTRIBUTE_GROUPS(hwmon);
1070
1071 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1072 {
1073         struct device *dev = &eeepc->platform_device->dev;
1074         struct device *hwmon;
1075
1076         hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1077                                                        hwmon_groups);
1078         if (IS_ERR(hwmon)) {
1079                 pr_err("Could not register eeepc hwmon device\n");
1080                 return PTR_ERR(hwmon);
1081         }
1082         return 0;
1083 }
1084
1085 /*
1086  * Backlight device
1087  */
1088 static int read_brightness(struct backlight_device *bd)
1089 {
1090         struct eeepc_laptop *eeepc = bl_get_data(bd);
1091
1092         return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1093 }
1094
1095 static int set_brightness(struct backlight_device *bd, int value)
1096 {
1097         struct eeepc_laptop *eeepc = bl_get_data(bd);
1098
1099         return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1100 }
1101
1102 static int update_bl_status(struct backlight_device *bd)
1103 {
1104         return set_brightness(bd, bd->props.brightness);
1105 }
1106
1107 static const struct backlight_ops eeepcbl_ops = {
1108         .get_brightness = read_brightness,
1109         .update_status = update_bl_status,
1110 };
1111
1112 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1113 {
1114         struct backlight_device *bd = eeepc->backlight_device;
1115         int old = bd->props.brightness;
1116
1117         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1118
1119         return old;
1120 }
1121
1122 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1123 {
1124         struct backlight_properties props;
1125         struct backlight_device *bd;
1126
1127         memset(&props, 0, sizeof(struct backlight_properties));
1128         props.type = BACKLIGHT_PLATFORM;
1129         props.max_brightness = 15;
1130         bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1131                                        &eeepc->platform_device->dev, eeepc,
1132                                        &eeepcbl_ops, &props);
1133         if (IS_ERR(bd)) {
1134                 pr_err("Could not register eeepc backlight device\n");
1135                 eeepc->backlight_device = NULL;
1136                 return PTR_ERR(bd);
1137         }
1138         eeepc->backlight_device = bd;
1139         bd->props.brightness = read_brightness(bd);
1140         bd->props.power = BACKLIGHT_POWER_ON;
1141         backlight_update_status(bd);
1142         return 0;
1143 }
1144
1145 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1146 {
1147         backlight_device_unregister(eeepc->backlight_device);
1148         eeepc->backlight_device = NULL;
1149 }
1150
1151
1152 /*
1153  * Input device (i.e. hotkeys)
1154  */
1155 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1156 {
1157         struct input_dev *input;
1158         int error;
1159
1160         input = input_allocate_device();
1161         if (!input)
1162                 return -ENOMEM;
1163
1164         input->name = "Asus EeePC extra buttons";
1165         input->phys = EEEPC_LAPTOP_FILE "/input0";
1166         input->id.bustype = BUS_HOST;
1167         input->dev.parent = &eeepc->platform_device->dev;
1168
1169         error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1170         if (error) {
1171                 pr_err("Unable to setup input device keymap\n");
1172                 goto err_free_dev;
1173         }
1174
1175         error = input_register_device(input);
1176         if (error) {
1177                 pr_err("Unable to register input device\n");
1178                 goto err_free_dev;
1179         }
1180
1181         eeepc->inputdev = input;
1182         return 0;
1183
1184 err_free_dev:
1185         input_free_device(input);
1186         return error;
1187 }
1188
1189 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1190 {
1191         if (eeepc->inputdev)
1192                 input_unregister_device(eeepc->inputdev);
1193         eeepc->inputdev = NULL;
1194 }
1195
1196 /*
1197  * ACPI driver
1198  */
1199 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1200 {
1201         if (!eeepc->inputdev)
1202                 return;
1203         if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1204                 pr_info("Unknown key %x pressed\n", event);
1205 }
1206
1207 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1208 {
1209         struct eeepc_laptop *eeepc = acpi_driver_data(device);
1210         int old_brightness, new_brightness;
1211         u16 count;
1212
1213         if (event > ACPI_MAX_SYS_NOTIFY)
1214                 return;
1215         count = eeepc->event_count[event % 128]++;
1216         acpi_bus_generate_netlink_event(device->pnp.device_class,
1217                                         dev_name(&device->dev), event,
1218                                         count);
1219
1220         /* Brightness events are special */
1221         if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) {
1222                 eeepc_input_notify(eeepc, event);
1223                 return;
1224         }
1225
1226         /* Ignore them completely if the acpi video driver is used */
1227         if (!eeepc->backlight_device)
1228                 return;
1229
1230         /* Update the backlight device. */
1231         old_brightness = eeepc_backlight_notify(eeepc);
1232
1233         /* Convert event to keypress (obsolescent hack) */
1234         new_brightness = event - NOTIFY_BRN_MIN;
1235
1236         if (new_brightness < old_brightness) {
1237                 event = NOTIFY_BRN_MIN; /* brightness down */
1238         } else if (new_brightness > old_brightness) {
1239                 event = NOTIFY_BRN_MAX; /* brightness up */
1240         } else {
1241                 /*
1242                  * no change in brightness - already at min/max,
1243                  * event will be desired value (or else ignored)
1244                  */
1245         }
1246         eeepc_input_notify(eeepc, event);
1247 }
1248
1249 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1250 {
1251         const char *model;
1252
1253         model = dmi_get_system_info(DMI_PRODUCT_NAME);
1254         if (!model)
1255                 return;
1256
1257         /*
1258          * Blacklist for setting cpufv (cpu speed).
1259          *
1260          * EeePC 4G ("701") implements CFVS, but it is not supported
1261          * by the pre-installed OS, and the original option to change it
1262          * in the BIOS setup screen was removed in later versions.
1263          *
1264          * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1265          * this applies to all "701" models (4G/4G Surf/2G Surf).
1266          *
1267          * So Asus made a deliberate decision not to support it on this model.
1268          * We have several reports that using it can cause the system to hang
1269          *
1270          * The hang has also been reported on a "702" (Model name "8G"?).
1271          *
1272          * We avoid dmi_check_system() / dmi_match(), because they use
1273          * substring matching.  We don't want to affect the "701SD"
1274          * and "701SDX" models, because they do support S.H.E.
1275          */
1276         if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1277                 eeepc->cpufv_disabled = true;
1278                 pr_info("model %s does not officially support setting cpu speed\n",
1279                         model);
1280                 pr_info("cpufv disabled to avoid instability\n");
1281         }
1282
1283         /*
1284          * Blacklist for wlan hotplug
1285          *
1286          * Eeepc 1005HA doesn't work like others models and don't need the
1287          * hotplug code. In fact, current hotplug code seems to unplug another
1288          * device...
1289          */
1290         if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1291             strcmp(model, "1005PE") == 0) {
1292                 eeepc->hotplug_disabled = true;
1293                 pr_info("wlan hotplug disabled\n");
1294         }
1295 }
1296
1297 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1298 {
1299         int dummy;
1300
1301         /* Some BIOSes do not report cm although it is available.
1302            Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1303         if (!(eeepc->cm_supported & (1 << cm))
1304             && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1305                 pr_info("%s (%x) not reported by BIOS, enabling anyway\n",
1306                         name, 1 << cm);
1307                 eeepc->cm_supported |= 1 << cm;
1308         }
1309 }
1310
1311 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1312 {
1313         cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1314         cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1315         cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1316         cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1317 }
1318
1319 static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1320 {
1321         unsigned int init_flags;
1322         int result;
1323
1324         result = acpi_bus_get_status(eeepc->device);
1325         if (result)
1326                 return result;
1327         if (!eeepc->device->status.present) {
1328                 pr_err("Hotkey device not present, aborting\n");
1329                 return -ENODEV;
1330         }
1331
1332         init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1333         pr_notice("Hotkey init flags 0x%x\n", init_flags);
1334
1335         if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1336                 pr_err("Hotkey initialization failed\n");
1337                 return -ENODEV;
1338         }
1339
1340         /* get control methods supported */
1341         if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1342                 pr_err("Get control methods supported failed\n");
1343                 return -ENODEV;
1344         }
1345         cmsg_quirks(eeepc);
1346         pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1347
1348         return 0;
1349 }
1350
1351 static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1352 {
1353         /*
1354          * If the following call to set_acpi() fails, it's because there's no
1355          * camera so we can ignore the error.
1356          */
1357         if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1358                 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1359 }
1360
1361 static bool eeepc_device_present;
1362
1363 static int eeepc_acpi_add(struct acpi_device *device)
1364 {
1365         struct eeepc_laptop *eeepc;
1366         int result;
1367
1368         pr_notice(EEEPC_LAPTOP_NAME "\n");
1369         eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1370         if (!eeepc)
1371                 return -ENOMEM;
1372         eeepc->handle = device->handle;
1373         strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1374         strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1375         device->driver_data = eeepc;
1376         eeepc->device = device;
1377
1378         eeepc->hotplug_disabled = hotplug_disabled;
1379
1380         eeepc_dmi_check(eeepc);
1381
1382         result = eeepc_acpi_init(eeepc);
1383         if (result)
1384                 goto fail_platform;
1385         eeepc_enable_camera(eeepc);
1386
1387         /*
1388          * Register the platform device first.  It is used as a parent for the
1389          * sub-devices below.
1390          *
1391          * Note that if there are multiple instances of this ACPI device it
1392          * will bail out, because the platform device is registered with a
1393          * fixed name.  Of course it doesn't make sense to have more than one,
1394          * and machine-specific scripts find the fixed name convenient.  But
1395          * It's also good for us to exclude multiple instances because both
1396          * our hwmon and our wlan rfkill subdevice use global ACPI objects
1397          * (the EC and the PCI wlan slot respectively).
1398          */
1399         result = eeepc_platform_init(eeepc);
1400         if (result)
1401                 goto fail_platform;
1402
1403         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1404                 result = eeepc_backlight_init(eeepc);
1405                 if (result)
1406                         goto fail_backlight;
1407         }
1408
1409         result = eeepc_input_init(eeepc);
1410         if (result)
1411                 goto fail_input;
1412
1413         result = eeepc_hwmon_init(eeepc);
1414         if (result)
1415                 goto fail_hwmon;
1416
1417         result = eeepc_led_init(eeepc);
1418         if (result)
1419                 goto fail_led;
1420
1421         result = eeepc_rfkill_init(eeepc);
1422         if (result)
1423                 goto fail_rfkill;
1424
1425         eeepc_device_present = true;
1426         return 0;
1427
1428 fail_rfkill:
1429         eeepc_led_exit(eeepc);
1430 fail_led:
1431 fail_hwmon:
1432         eeepc_input_exit(eeepc);
1433 fail_input:
1434         eeepc_backlight_exit(eeepc);
1435 fail_backlight:
1436         eeepc_platform_exit(eeepc);
1437 fail_platform:
1438         kfree(eeepc);
1439
1440         return result;
1441 }
1442
1443 static void eeepc_acpi_remove(struct acpi_device *device)
1444 {
1445         struct eeepc_laptop *eeepc = acpi_driver_data(device);
1446
1447         eeepc_backlight_exit(eeepc);
1448         eeepc_rfkill_exit(eeepc);
1449         eeepc_input_exit(eeepc);
1450         eeepc_led_exit(eeepc);
1451         eeepc_platform_exit(eeepc);
1452
1453         kfree(eeepc);
1454 }
1455
1456
1457 static const struct acpi_device_id eeepc_device_ids[] = {
1458         {EEEPC_ACPI_HID, 0},
1459         {"", 0},
1460 };
1461 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1462
1463 static struct acpi_driver eeepc_acpi_driver = {
1464         .name = EEEPC_LAPTOP_NAME,
1465         .class = EEEPC_ACPI_CLASS,
1466         .ids = eeepc_device_ids,
1467         .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1468         .ops = {
1469                 .add = eeepc_acpi_add,
1470                 .remove = eeepc_acpi_remove,
1471                 .notify = eeepc_acpi_notify,
1472         },
1473 };
1474
1475
1476 static int __init eeepc_laptop_init(void)
1477 {
1478         int result;
1479
1480         result = platform_driver_register(&platform_driver);
1481         if (result < 0)
1482                 return result;
1483
1484         result = acpi_bus_register_driver(&eeepc_acpi_driver);
1485         if (result < 0)
1486                 goto fail_acpi_driver;
1487
1488         if (!eeepc_device_present) {
1489                 result = -ENODEV;
1490                 goto fail_no_device;
1491         }
1492
1493         return 0;
1494
1495 fail_no_device:
1496         acpi_bus_unregister_driver(&eeepc_acpi_driver);
1497 fail_acpi_driver:
1498         platform_driver_unregister(&platform_driver);
1499         return result;
1500 }
1501
1502 static void __exit eeepc_laptop_exit(void)
1503 {
1504         acpi_bus_unregister_driver(&eeepc_acpi_driver);
1505         platform_driver_unregister(&platform_driver);
1506 }
1507
1508 module_init(eeepc_laptop_init);
1509 module_exit(eeepc_laptop_exit);