1 /* 2 * Asus PC WMI hotkey driver 3 * 4 * Copyright(C) 2010 Intel Corporation. 5 * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com> 6 * 7 * Portions based on wistron_btns.c: 8 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz> 9 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org> 10 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru> 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25 */ 26 27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 28 29 #include <linux/kernel.h> 30 #include <linux/module.h> 31 #include <linux/init.h> 32 #include <linux/types.h> 33 #include <linux/slab.h> 34 #include <linux/input.h> 35 #include <linux/input/sparse-keymap.h> 36 #include <linux/fb.h> 37 #include <linux/backlight.h> 38 #include <linux/leds.h> 39 #include <linux/rfkill.h> 40 #include <linux/pci.h> 41 #include <linux/pci_hotplug.h> 42 #include <linux/hwmon.h> 43 #include <linux/hwmon-sysfs.h> 44 #include <linux/debugfs.h> 45 #include <linux/seq_file.h> 46 #include <linux/platform_device.h> 47 #include <linux/thermal.h> 48 #include <acpi/acpi_bus.h> 49 #include <acpi/acpi_drivers.h> 50 #include <acpi/video.h> 51 52 #include "asus-wmi.h" 53 54 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, " 55 "Yong Wang <yong.y.wang@intel.com>"); 56 MODULE_DESCRIPTION("Asus Generic WMI Driver"); 57 MODULE_LICENSE("GPL"); 58 59 #define to_platform_driver(drv) \ 60 (container_of((drv), struct platform_driver, driver)) 61 62 #define to_asus_wmi_driver(pdrv) \ 63 (container_of((pdrv), struct asus_wmi_driver, platform_driver)) 64 65 #define ASUS_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66" 66 67 #define NOTIFY_BRNUP_MIN 0x11 68 #define NOTIFY_BRNUP_MAX 0x1f 69 #define NOTIFY_BRNDOWN_MIN 0x20 70 #define NOTIFY_BRNDOWN_MAX 0x2e 71 #define NOTIFY_KBD_BRTUP 0xc4 72 #define NOTIFY_KBD_BRTDWN 0xc5 73 74 /* WMI Methods */ 75 #define ASUS_WMI_METHODID_SPEC 0x43455053 /* BIOS SPECification */ 76 #define ASUS_WMI_METHODID_SFBD 0x44424653 /* Set First Boot Device */ 77 #define ASUS_WMI_METHODID_GLCD 0x44434C47 /* Get LCD status */ 78 #define ASUS_WMI_METHODID_GPID 0x44495047 /* Get Panel ID?? (Resol) */ 79 #define ASUS_WMI_METHODID_QMOD 0x444F4D51 /* Quiet MODe */ 80 #define ASUS_WMI_METHODID_SPLV 0x4C425053 /* Set Panel Light Value */ 81 #define ASUS_WMI_METHODID_SFUN 0x4E554653 /* FUNCtionalities */ 82 #define ASUS_WMI_METHODID_SDSP 0x50534453 /* Set DiSPlay output */ 83 #define ASUS_WMI_METHODID_GDSP 0x50534447 /* Get DiSPlay output */ 84 #define ASUS_WMI_METHODID_DEVP 0x50564544 /* DEVice Policy */ 85 #define ASUS_WMI_METHODID_OSVR 0x5256534F /* OS VeRsion */ 86 #define ASUS_WMI_METHODID_DSTS 0x53544344 /* Device STatuS */ 87 #define ASUS_WMI_METHODID_DSTS2 0x53545344 /* Device STatuS #2*/ 88 #define ASUS_WMI_METHODID_BSTS 0x53545342 /* Bios STatuS ? */ 89 #define ASUS_WMI_METHODID_DEVS 0x53564544 /* DEVice Set */ 90 #define ASUS_WMI_METHODID_CFVS 0x53564643 /* CPU Frequency Volt Set */ 91 #define ASUS_WMI_METHODID_KBFT 0x5446424B /* KeyBoard FilTer */ 92 #define ASUS_WMI_METHODID_INIT 0x54494E49 /* INITialize */ 93 #define ASUS_WMI_METHODID_HKEY 0x59454B48 /* Hot KEY ?? */ 94 95 #define ASUS_WMI_UNSUPPORTED_METHOD 0xFFFFFFFE 96 97 /* Wireless */ 98 #define ASUS_WMI_DEVID_HW_SWITCH 0x00010001 99 #define ASUS_WMI_DEVID_WIRELESS_LED 0x00010002 100 #define ASUS_WMI_DEVID_CWAP 0x00010003 101 #define ASUS_WMI_DEVID_WLAN 0x00010011 102 #define ASUS_WMI_DEVID_WLAN_LED 0x00010012 103 #define ASUS_WMI_DEVID_BLUETOOTH 0x00010013 104 #define ASUS_WMI_DEVID_GPS 0x00010015 105 #define ASUS_WMI_DEVID_WIMAX 0x00010017 106 #define ASUS_WMI_DEVID_WWAN3G 0x00010019 107 #define ASUS_WMI_DEVID_UWB 0x00010021 108 109 /* Leds */ 110 /* 0x000200XX and 0x000400XX */ 111 #define ASUS_WMI_DEVID_LED1 0x00020011 112 #define ASUS_WMI_DEVID_LED2 0x00020012 113 #define ASUS_WMI_DEVID_LED3 0x00020013 114 #define ASUS_WMI_DEVID_LED4 0x00020014 115 #define ASUS_WMI_DEVID_LED5 0x00020015 116 #define ASUS_WMI_DEVID_LED6 0x00020016 117 118 /* Backlight and Brightness */ 119 #define ASUS_WMI_DEVID_BACKLIGHT 0x00050011 120 #define ASUS_WMI_DEVID_BRIGHTNESS 0x00050012 121 #define ASUS_WMI_DEVID_KBD_BACKLIGHT 0x00050021 122 #define ASUS_WMI_DEVID_LIGHT_SENSOR 0x00050022 /* ?? */ 123 124 /* Misc */ 125 #define ASUS_WMI_DEVID_CAMERA 0x00060013 126 127 /* Storage */ 128 #define ASUS_WMI_DEVID_CARDREADER 0x00080013 129 130 /* Input */ 131 #define ASUS_WMI_DEVID_TOUCHPAD 0x00100011 132 #define ASUS_WMI_DEVID_TOUCHPAD_LED 0x00100012 133 134 /* Fan, Thermal */ 135 #define ASUS_WMI_DEVID_THERMAL_CTRL 0x00110011 136 #define ASUS_WMI_DEVID_FAN_CTRL 0x00110012 137 138 /* Power */ 139 #define ASUS_WMI_DEVID_PROCESSOR_STATE 0x00120012 140 141 /* Deep S3 / Resume on LID open */ 142 #define ASUS_WMI_DEVID_LID_RESUME 0x00120031 143 144 /* DSTS masks */ 145 #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001 146 #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002 147 #define ASUS_WMI_DSTS_PRESENCE_BIT 0x00010000 148 #define ASUS_WMI_DSTS_USER_BIT 0x00020000 149 #define ASUS_WMI_DSTS_BIOS_BIT 0x00040000 150 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF 151 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00 152 153 struct bios_args { 154 u32 arg0; 155 u32 arg1; 156 } __packed; 157 158 /* 159 * <platform>/ - debugfs root directory 160 * dev_id - current dev_id 161 * ctrl_param - current ctrl_param 162 * method_id - current method_id 163 * devs - call DEVS(dev_id, ctrl_param) and print result 164 * dsts - call DSTS(dev_id) and print result 165 * call - call method_id(dev_id, ctrl_param) and print result 166 */ 167 struct asus_wmi_debug { 168 struct dentry *root; 169 u32 method_id; 170 u32 dev_id; 171 u32 ctrl_param; 172 }; 173 174 struct asus_rfkill { 175 struct asus_wmi *asus; 176 struct rfkill *rfkill; 177 u32 dev_id; 178 }; 179 180 struct asus_wmi { 181 int dsts_id; 182 int spec; 183 int sfun; 184 185 struct input_dev *inputdev; 186 struct backlight_device *backlight_device; 187 struct device *hwmon_device; 188 struct platform_device *platform_device; 189 190 struct led_classdev wlan_led; 191 int wlan_led_wk; 192 struct led_classdev tpd_led; 193 int tpd_led_wk; 194 struct led_classdev kbd_led; 195 int kbd_led_wk; 196 struct workqueue_struct *led_workqueue; 197 struct work_struct tpd_led_work; 198 struct work_struct kbd_led_work; 199 struct work_struct wlan_led_work; 200 201 struct asus_rfkill wlan; 202 struct asus_rfkill bluetooth; 203 struct asus_rfkill wimax; 204 struct asus_rfkill wwan3g; 205 struct asus_rfkill gps; 206 struct asus_rfkill uwb; 207 208 struct hotplug_slot *hotplug_slot; 209 struct mutex hotplug_lock; 210 struct mutex wmi_lock; 211 struct workqueue_struct *hotplug_workqueue; 212 struct work_struct hotplug_work; 213 214 struct asus_wmi_debug debug; 215 216 struct asus_wmi_driver *driver; 217 }; 218 219 static int asus_wmi_input_init(struct asus_wmi *asus) 220 { 221 int err; 222 223 asus->inputdev = input_allocate_device(); 224 if (!asus->inputdev) 225 return -ENOMEM; 226 227 asus->inputdev->name = asus->driver->input_name; 228 asus->inputdev->phys = asus->driver->input_phys; 229 asus->inputdev->id.bustype = BUS_HOST; 230 asus->inputdev->dev.parent = &asus->platform_device->dev; 231 set_bit(EV_REP, asus->inputdev->evbit); 232 233 err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL); 234 if (err) 235 goto err_free_dev; 236 237 err = input_register_device(asus->inputdev); 238 if (err) 239 goto err_free_keymap; 240 241 return 0; 242 243 err_free_keymap: 244 sparse_keymap_free(asus->inputdev); 245 err_free_dev: 246 input_free_device(asus->inputdev); 247 return err; 248 } 249 250 static void asus_wmi_input_exit(struct asus_wmi *asus) 251 { 252 if (asus->inputdev) { 253 sparse_keymap_free(asus->inputdev); 254 input_unregister_device(asus->inputdev); 255 } 256 257 asus->inputdev = NULL; 258 } 259 260 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, 261 u32 *retval) 262 { 263 struct bios_args args = { 264 .arg0 = arg0, 265 .arg1 = arg1, 266 }; 267 struct acpi_buffer input = { (acpi_size) sizeof(args), &args }; 268 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 269 acpi_status status; 270 union acpi_object *obj; 271 u32 tmp; 272 273 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id, 274 &input, &output); 275 276 if (ACPI_FAILURE(status)) 277 goto exit; 278 279 obj = (union acpi_object *)output.pointer; 280 if (obj && obj->type == ACPI_TYPE_INTEGER) 281 tmp = (u32) obj->integer.value; 282 else 283 tmp = 0; 284 285 if (retval) 286 *retval = tmp; 287 288 kfree(obj); 289 290 exit: 291 if (ACPI_FAILURE(status)) 292 return -EIO; 293 294 if (tmp == ASUS_WMI_UNSUPPORTED_METHOD) 295 return -ENODEV; 296 297 return 0; 298 } 299 300 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval) 301 { 302 return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval); 303 } 304 305 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, 306 u32 *retval) 307 { 308 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id, 309 ctrl_param, retval); 310 } 311 312 /* Helper for special devices with magic return codes */ 313 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus, 314 u32 dev_id, u32 mask) 315 { 316 u32 retval = 0; 317 int err; 318 319 err = asus_wmi_get_devstate(asus, dev_id, &retval); 320 321 if (err < 0) 322 return err; 323 324 if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT)) 325 return -ENODEV; 326 327 if (mask == ASUS_WMI_DSTS_STATUS_BIT) { 328 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT) 329 return -ENODEV; 330 } 331 332 return retval & mask; 333 } 334 335 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id) 336 { 337 return asus_wmi_get_devstate_bits(asus, dev_id, 338 ASUS_WMI_DSTS_STATUS_BIT); 339 } 340 341 /* 342 * LEDs 343 */ 344 /* 345 * These functions actually update the LED's, and are called from a 346 * workqueue. By doing this as separate work rather than when the LED 347 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 348 * potentially bad time, such as a timer interrupt. 349 */ 350 static void tpd_led_update(struct work_struct *work) 351 { 352 int ctrl_param; 353 struct asus_wmi *asus; 354 355 asus = container_of(work, struct asus_wmi, tpd_led_work); 356 357 ctrl_param = asus->tpd_led_wk; 358 asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL); 359 } 360 361 static void tpd_led_set(struct led_classdev *led_cdev, 362 enum led_brightness value) 363 { 364 struct asus_wmi *asus; 365 366 asus = container_of(led_cdev, struct asus_wmi, tpd_led); 367 368 asus->tpd_led_wk = !!value; 369 queue_work(asus->led_workqueue, &asus->tpd_led_work); 370 } 371 372 static int read_tpd_led_state(struct asus_wmi *asus) 373 { 374 return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED); 375 } 376 377 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 378 { 379 struct asus_wmi *asus; 380 381 asus = container_of(led_cdev, struct asus_wmi, tpd_led); 382 383 return read_tpd_led_state(asus); 384 } 385 386 static void kbd_led_update(struct work_struct *work) 387 { 388 int ctrl_param = 0; 389 struct asus_wmi *asus; 390 391 asus = container_of(work, struct asus_wmi, kbd_led_work); 392 393 /* 394 * bits 0-2: level 395 * bit 7: light on/off 396 */ 397 if (asus->kbd_led_wk > 0) 398 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F); 399 400 asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL); 401 } 402 403 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env) 404 { 405 int retval; 406 407 /* 408 * bits 0-2: level 409 * bit 7: light on/off 410 * bit 8-10: environment (0: dark, 1: normal, 2: light) 411 * bit 17: status unknown 412 */ 413 retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT, 414 0xFFFF); 415 416 /* Unknown status is considered as off */ 417 if (retval == 0x8000) 418 retval = 0; 419 420 if (retval >= 0) { 421 if (level) 422 *level = retval & 0x7F; 423 if (env) 424 *env = (retval >> 8) & 0x7F; 425 retval = 0; 426 } 427 428 return retval; 429 } 430 431 static void kbd_led_set(struct led_classdev *led_cdev, 432 enum led_brightness value) 433 { 434 struct asus_wmi *asus; 435 436 asus = container_of(led_cdev, struct asus_wmi, kbd_led); 437 438 if (value > asus->kbd_led.max_brightness) 439 value = asus->kbd_led.max_brightness; 440 else if (value < 0) 441 value = 0; 442 443 asus->kbd_led_wk = value; 444 queue_work(asus->led_workqueue, &asus->kbd_led_work); 445 } 446 447 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev) 448 { 449 struct asus_wmi *asus; 450 int retval, value; 451 452 asus = container_of(led_cdev, struct asus_wmi, kbd_led); 453 454 retval = kbd_led_read(asus, &value, NULL); 455 456 if (retval < 0) 457 return retval; 458 459 return value; 460 } 461 462 static int wlan_led_unknown_state(struct asus_wmi *asus) 463 { 464 u32 result; 465 466 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result); 467 468 return result & ASUS_WMI_DSTS_UNKNOWN_BIT; 469 } 470 471 static int wlan_led_presence(struct asus_wmi *asus) 472 { 473 u32 result; 474 475 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result); 476 477 return result & ASUS_WMI_DSTS_PRESENCE_BIT; 478 } 479 480 static void wlan_led_update(struct work_struct *work) 481 { 482 int ctrl_param; 483 struct asus_wmi *asus; 484 485 asus = container_of(work, struct asus_wmi, wlan_led_work); 486 487 ctrl_param = asus->wlan_led_wk; 488 asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL); 489 } 490 491 static void wlan_led_set(struct led_classdev *led_cdev, 492 enum led_brightness value) 493 { 494 struct asus_wmi *asus; 495 496 asus = container_of(led_cdev, struct asus_wmi, wlan_led); 497 498 asus->wlan_led_wk = !!value; 499 queue_work(asus->led_workqueue, &asus->wlan_led_work); 500 } 501 502 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev) 503 { 504 struct asus_wmi *asus; 505 u32 result; 506 507 asus = container_of(led_cdev, struct asus_wmi, wlan_led); 508 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result); 509 510 return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK; 511 } 512 513 static void asus_wmi_led_exit(struct asus_wmi *asus) 514 { 515 if (!IS_ERR_OR_NULL(asus->kbd_led.dev)) 516 led_classdev_unregister(&asus->kbd_led); 517 if (!IS_ERR_OR_NULL(asus->tpd_led.dev)) 518 led_classdev_unregister(&asus->tpd_led); 519 if (!IS_ERR_OR_NULL(asus->wlan_led.dev)) 520 led_classdev_unregister(&asus->wlan_led); 521 if (asus->led_workqueue) 522 destroy_workqueue(asus->led_workqueue); 523 } 524 525 static int asus_wmi_led_init(struct asus_wmi *asus) 526 { 527 int rv = 0; 528 529 asus->led_workqueue = create_singlethread_workqueue("led_workqueue"); 530 if (!asus->led_workqueue) 531 return -ENOMEM; 532 533 if (read_tpd_led_state(asus) >= 0) { 534 INIT_WORK(&asus->tpd_led_work, tpd_led_update); 535 536 asus->tpd_led.name = "asus::touchpad"; 537 asus->tpd_led.brightness_set = tpd_led_set; 538 asus->tpd_led.brightness_get = tpd_led_get; 539 asus->tpd_led.max_brightness = 1; 540 541 rv = led_classdev_register(&asus->platform_device->dev, 542 &asus->tpd_led); 543 if (rv) 544 goto error; 545 } 546 547 if (kbd_led_read(asus, NULL, NULL) >= 0) { 548 INIT_WORK(&asus->kbd_led_work, kbd_led_update); 549 550 asus->kbd_led.name = "asus::kbd_backlight"; 551 asus->kbd_led.brightness_set = kbd_led_set; 552 asus->kbd_led.brightness_get = kbd_led_get; 553 asus->kbd_led.max_brightness = 3; 554 555 rv = led_classdev_register(&asus->platform_device->dev, 556 &asus->kbd_led); 557 if (rv) 558 goto error; 559 } 560 561 if (wlan_led_presence(asus)) { 562 INIT_WORK(&asus->wlan_led_work, wlan_led_update); 563 564 asus->wlan_led.name = "asus::wlan"; 565 asus->wlan_led.brightness_set = wlan_led_set; 566 if (!wlan_led_unknown_state(asus)) 567 asus->wlan_led.brightness_get = wlan_led_get; 568 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME; 569 asus->wlan_led.max_brightness = 1; 570 asus->wlan_led.default_trigger = "asus-wlan"; 571 572 rv = led_classdev_register(&asus->platform_device->dev, 573 &asus->wlan_led); 574 } 575 576 error: 577 if (rv) 578 asus_wmi_led_exit(asus); 579 580 return rv; 581 } 582 583 584 /* 585 * PCI hotplug (for wlan rfkill) 586 */ 587 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus) 588 { 589 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN); 590 591 if (result < 0) 592 return false; 593 return !result; 594 } 595 596 static void asus_rfkill_hotplug(struct asus_wmi *asus) 597 { 598 struct pci_dev *dev; 599 struct pci_bus *bus; 600 bool blocked; 601 bool absent; 602 u32 l; 603 604 mutex_lock(&asus->wmi_lock); 605 blocked = asus_wlan_rfkill_blocked(asus); 606 mutex_unlock(&asus->wmi_lock); 607 608 mutex_lock(&asus->hotplug_lock); 609 610 if (asus->wlan.rfkill) 611 rfkill_set_sw_state(asus->wlan.rfkill, blocked); 612 613 if (asus->hotplug_slot) { 614 bus = pci_find_bus(0, 1); 615 if (!bus) { 616 pr_warn("Unable to find PCI bus 1?\n"); 617 goto out_unlock; 618 } 619 620 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 621 pr_err("Unable to read PCI config space?\n"); 622 goto out_unlock; 623 } 624 absent = (l == 0xffffffff); 625 626 if (blocked != absent) { 627 pr_warn("BIOS says wireless lan is %s, " 628 "but the pci device is %s\n", 629 blocked ? "blocked" : "unblocked", 630 absent ? "absent" : "present"); 631 pr_warn("skipped wireless hotplug as probably " 632 "inappropriate for this model\n"); 633 goto out_unlock; 634 } 635 636 if (!blocked) { 637 dev = pci_get_slot(bus, 0); 638 if (dev) { 639 /* Device already present */ 640 pci_dev_put(dev); 641 goto out_unlock; 642 } 643 dev = pci_scan_single_device(bus, 0); 644 if (dev) { 645 pci_bus_assign_resources(bus); 646 if (pci_bus_add_device(dev)) 647 pr_err("Unable to hotplug wifi\n"); 648 } 649 } else { 650 dev = pci_get_slot(bus, 0); 651 if (dev) { 652 pci_stop_and_remove_bus_device(dev); 653 pci_dev_put(dev); 654 } 655 } 656 } 657 658 out_unlock: 659 mutex_unlock(&asus->hotplug_lock); 660 } 661 662 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data) 663 { 664 struct asus_wmi *asus = data; 665 666 if (event != ACPI_NOTIFY_BUS_CHECK) 667 return; 668 669 /* 670 * We can't call directly asus_rfkill_hotplug because most 671 * of the time WMBC is still being executed and not reetrant. 672 * There is currently no way to tell ACPICA that we want this 673 * method to be serialized, we schedule a asus_rfkill_hotplug 674 * call later, in a safer context. 675 */ 676 queue_work(asus->hotplug_workqueue, &asus->hotplug_work); 677 } 678 679 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node) 680 { 681 acpi_status status; 682 acpi_handle handle; 683 684 status = acpi_get_handle(NULL, node, &handle); 685 686 if (ACPI_SUCCESS(status)) { 687 status = acpi_install_notify_handler(handle, 688 ACPI_SYSTEM_NOTIFY, 689 asus_rfkill_notify, asus); 690 if (ACPI_FAILURE(status)) 691 pr_warn("Failed to register notify on %s\n", node); 692 } else 693 return -ENODEV; 694 695 return 0; 696 } 697 698 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node) 699 { 700 acpi_status status = AE_OK; 701 acpi_handle handle; 702 703 status = acpi_get_handle(NULL, node, &handle); 704 705 if (ACPI_SUCCESS(status)) { 706 status = acpi_remove_notify_handler(handle, 707 ACPI_SYSTEM_NOTIFY, 708 asus_rfkill_notify); 709 if (ACPI_FAILURE(status)) 710 pr_err("Error removing rfkill notify handler %s\n", 711 node); 712 } 713 } 714 715 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot, 716 u8 *value) 717 { 718 struct asus_wmi *asus = hotplug_slot->private; 719 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN); 720 721 if (result < 0) 722 return result; 723 724 *value = !!result; 725 return 0; 726 } 727 728 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 729 { 730 kfree(hotplug_slot->info); 731 kfree(hotplug_slot); 732 } 733 734 static struct hotplug_slot_ops asus_hotplug_slot_ops = { 735 .owner = THIS_MODULE, 736 .get_adapter_status = asus_get_adapter_status, 737 .get_power_status = asus_get_adapter_status, 738 }; 739 740 static void asus_hotplug_work(struct work_struct *work) 741 { 742 struct asus_wmi *asus; 743 744 asus = container_of(work, struct asus_wmi, hotplug_work); 745 asus_rfkill_hotplug(asus); 746 } 747 748 static int asus_setup_pci_hotplug(struct asus_wmi *asus) 749 { 750 int ret = -ENOMEM; 751 struct pci_bus *bus = pci_find_bus(0, 1); 752 753 if (!bus) { 754 pr_err("Unable to find wifi PCI bus\n"); 755 return -ENODEV; 756 } 757 758 asus->hotplug_workqueue = 759 create_singlethread_workqueue("hotplug_workqueue"); 760 if (!asus->hotplug_workqueue) 761 goto error_workqueue; 762 763 INIT_WORK(&asus->hotplug_work, asus_hotplug_work); 764 765 asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 766 if (!asus->hotplug_slot) 767 goto error_slot; 768 769 asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 770 GFP_KERNEL); 771 if (!asus->hotplug_slot->info) 772 goto error_info; 773 774 asus->hotplug_slot->private = asus; 775 asus->hotplug_slot->release = &asus_cleanup_pci_hotplug; 776 asus->hotplug_slot->ops = &asus_hotplug_slot_ops; 777 asus_get_adapter_status(asus->hotplug_slot, 778 &asus->hotplug_slot->info->adapter_status); 779 780 ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi"); 781 if (ret) { 782 pr_err("Unable to register hotplug slot - %d\n", ret); 783 goto error_register; 784 } 785 786 return 0; 787 788 error_register: 789 kfree(asus->hotplug_slot->info); 790 error_info: 791 kfree(asus->hotplug_slot); 792 asus->hotplug_slot = NULL; 793 error_slot: 794 destroy_workqueue(asus->hotplug_workqueue); 795 error_workqueue: 796 return ret; 797 } 798 799 /* 800 * Rfkill devices 801 */ 802 static int asus_rfkill_set(void *data, bool blocked) 803 { 804 struct asus_rfkill *priv = data; 805 u32 ctrl_param = !blocked; 806 u32 dev_id = priv->dev_id; 807 808 /* 809 * If the user bit is set, BIOS can't set and record the wlan status, 810 * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED 811 * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN). 812 * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED 813 * while setting the wlan status through WMI. 814 * This is also the behavior that windows app will do. 815 */ 816 if ((dev_id == ASUS_WMI_DEVID_WLAN) && 817 priv->asus->driver->wlan_ctrl_by_user) 818 dev_id = ASUS_WMI_DEVID_WLAN_LED; 819 820 return asus_wmi_set_devstate(dev_id, ctrl_param, NULL); 821 } 822 823 static void asus_rfkill_query(struct rfkill *rfkill, void *data) 824 { 825 struct asus_rfkill *priv = data; 826 int result; 827 828 result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id); 829 830 if (result < 0) 831 return; 832 833 rfkill_set_sw_state(priv->rfkill, !result); 834 } 835 836 static int asus_rfkill_wlan_set(void *data, bool blocked) 837 { 838 struct asus_rfkill *priv = data; 839 struct asus_wmi *asus = priv->asus; 840 int ret; 841 842 /* 843 * This handler is enabled only if hotplug is enabled. 844 * In this case, the asus_wmi_set_devstate() will 845 * trigger a wmi notification and we need to wait 846 * this call to finish before being able to call 847 * any wmi method 848 */ 849 mutex_lock(&asus->wmi_lock); 850 ret = asus_rfkill_set(data, blocked); 851 mutex_unlock(&asus->wmi_lock); 852 return ret; 853 } 854 855 static const struct rfkill_ops asus_rfkill_wlan_ops = { 856 .set_block = asus_rfkill_wlan_set, 857 .query = asus_rfkill_query, 858 }; 859 860 static const struct rfkill_ops asus_rfkill_ops = { 861 .set_block = asus_rfkill_set, 862 .query = asus_rfkill_query, 863 }; 864 865 static int asus_new_rfkill(struct asus_wmi *asus, 866 struct asus_rfkill *arfkill, 867 const char *name, enum rfkill_type type, int dev_id) 868 { 869 int result = asus_wmi_get_devstate_simple(asus, dev_id); 870 struct rfkill **rfkill = &arfkill->rfkill; 871 872 if (result < 0) 873 return result; 874 875 arfkill->dev_id = dev_id; 876 arfkill->asus = asus; 877 878 if (dev_id == ASUS_WMI_DEVID_WLAN && 879 asus->driver->quirks->hotplug_wireless) 880 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type, 881 &asus_rfkill_wlan_ops, arfkill); 882 else 883 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type, 884 &asus_rfkill_ops, arfkill); 885 886 if (!*rfkill) 887 return -EINVAL; 888 889 if (dev_id == ASUS_WMI_DEVID_WLAN) 890 rfkill_set_led_trigger_name(*rfkill, "asus-wlan"); 891 892 rfkill_init_sw_state(*rfkill, !result); 893 result = rfkill_register(*rfkill); 894 if (result) { 895 rfkill_destroy(*rfkill); 896 *rfkill = NULL; 897 return result; 898 } 899 return 0; 900 } 901 902 static void asus_wmi_rfkill_exit(struct asus_wmi *asus) 903 { 904 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5"); 905 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6"); 906 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7"); 907 if (asus->wlan.rfkill) { 908 rfkill_unregister(asus->wlan.rfkill); 909 rfkill_destroy(asus->wlan.rfkill); 910 asus->wlan.rfkill = NULL; 911 } 912 /* 913 * Refresh pci hotplug in case the rfkill state was changed after 914 * asus_unregister_rfkill_notifier() 915 */ 916 asus_rfkill_hotplug(asus); 917 if (asus->hotplug_slot) 918 pci_hp_deregister(asus->hotplug_slot); 919 if (asus->hotplug_workqueue) 920 destroy_workqueue(asus->hotplug_workqueue); 921 922 if (asus->bluetooth.rfkill) { 923 rfkill_unregister(asus->bluetooth.rfkill); 924 rfkill_destroy(asus->bluetooth.rfkill); 925 asus->bluetooth.rfkill = NULL; 926 } 927 if (asus->wimax.rfkill) { 928 rfkill_unregister(asus->wimax.rfkill); 929 rfkill_destroy(asus->wimax.rfkill); 930 asus->wimax.rfkill = NULL; 931 } 932 if (asus->wwan3g.rfkill) { 933 rfkill_unregister(asus->wwan3g.rfkill); 934 rfkill_destroy(asus->wwan3g.rfkill); 935 asus->wwan3g.rfkill = NULL; 936 } 937 if (asus->gps.rfkill) { 938 rfkill_unregister(asus->gps.rfkill); 939 rfkill_destroy(asus->gps.rfkill); 940 asus->gps.rfkill = NULL; 941 } 942 if (asus->uwb.rfkill) { 943 rfkill_unregister(asus->uwb.rfkill); 944 rfkill_destroy(asus->uwb.rfkill); 945 asus->uwb.rfkill = NULL; 946 } 947 } 948 949 static int asus_wmi_rfkill_init(struct asus_wmi *asus) 950 { 951 int result = 0; 952 953 mutex_init(&asus->hotplug_lock); 954 mutex_init(&asus->wmi_lock); 955 956 result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan", 957 RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN); 958 959 if (result && result != -ENODEV) 960 goto exit; 961 962 result = asus_new_rfkill(asus, &asus->bluetooth, 963 "asus-bluetooth", RFKILL_TYPE_BLUETOOTH, 964 ASUS_WMI_DEVID_BLUETOOTH); 965 966 if (result && result != -ENODEV) 967 goto exit; 968 969 result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax", 970 RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX); 971 972 if (result && result != -ENODEV) 973 goto exit; 974 975 result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g", 976 RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G); 977 978 if (result && result != -ENODEV) 979 goto exit; 980 981 result = asus_new_rfkill(asus, &asus->gps, "asus-gps", 982 RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS); 983 984 if (result && result != -ENODEV) 985 goto exit; 986 987 result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb", 988 RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB); 989 990 if (result && result != -ENODEV) 991 goto exit; 992 993 if (!asus->driver->quirks->hotplug_wireless) 994 goto exit; 995 996 result = asus_setup_pci_hotplug(asus); 997 /* 998 * If we get -EBUSY then something else is handling the PCI hotplug - 999 * don't fail in this case 1000 */ 1001 if (result == -EBUSY) 1002 result = 0; 1003 1004 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5"); 1005 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6"); 1006 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7"); 1007 /* 1008 * Refresh pci hotplug in case the rfkill state was changed during 1009 * setup. 1010 */ 1011 asus_rfkill_hotplug(asus); 1012 1013 exit: 1014 if (result && result != -ENODEV) 1015 asus_wmi_rfkill_exit(asus); 1016 1017 if (result == -ENODEV) 1018 result = 0; 1019 1020 return result; 1021 } 1022 1023 /* 1024 * Hwmon device 1025 */ 1026 static ssize_t asus_hwmon_pwm1(struct device *dev, 1027 struct device_attribute *attr, 1028 char *buf) 1029 { 1030 struct asus_wmi *asus = dev_get_drvdata(dev); 1031 u32 value; 1032 int err; 1033 1034 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value); 1035 1036 if (err < 0) 1037 return err; 1038 1039 value &= 0xFF; 1040 1041 if (value == 1) /* Low Speed */ 1042 value = 85; 1043 else if (value == 2) 1044 value = 170; 1045 else if (value == 3) 1046 value = 255; 1047 else if (value != 0) { 1048 pr_err("Unknown fan speed %#x", value); 1049 value = -1; 1050 } 1051 1052 return sprintf(buf, "%d\n", value); 1053 } 1054 1055 static ssize_t asus_hwmon_temp1(struct device *dev, 1056 struct device_attribute *attr, 1057 char *buf) 1058 { 1059 struct asus_wmi *asus = dev_get_drvdata(dev); 1060 u32 value; 1061 int err; 1062 1063 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value); 1064 1065 if (err < 0) 1066 return err; 1067 1068 value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000; 1069 1070 return sprintf(buf, "%d\n", value); 1071 } 1072 1073 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0); 1074 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL, 0); 1075 1076 static ssize_t 1077 show_name(struct device *dev, struct device_attribute *attr, char *buf) 1078 { 1079 return sprintf(buf, "asus\n"); 1080 } 1081 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0); 1082 1083 static struct attribute *hwmon_attributes[] = { 1084 &sensor_dev_attr_pwm1.dev_attr.attr, 1085 &sensor_dev_attr_temp1_input.dev_attr.attr, 1086 &sensor_dev_attr_name.dev_attr.attr, 1087 NULL 1088 }; 1089 1090 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj, 1091 struct attribute *attr, int idx) 1092 { 1093 struct device *dev = container_of(kobj, struct device, kobj); 1094 struct platform_device *pdev = to_platform_device(dev->parent); 1095 struct asus_wmi *asus = platform_get_drvdata(pdev); 1096 bool ok = true; 1097 int dev_id = -1; 1098 u32 value = ASUS_WMI_UNSUPPORTED_METHOD; 1099 1100 if (attr == &sensor_dev_attr_pwm1.dev_attr.attr) 1101 dev_id = ASUS_WMI_DEVID_FAN_CTRL; 1102 else if (attr == &sensor_dev_attr_temp1_input.dev_attr.attr) 1103 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL; 1104 1105 if (dev_id != -1) { 1106 int err = asus_wmi_get_devstate(asus, dev_id, &value); 1107 1108 if (err < 0) 1109 return 0; /* can't return negative here */ 1110 } 1111 1112 if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) { 1113 /* 1114 * We need to find a better way, probably using sfun, 1115 * bits or spec ... 1116 * Currently we disable it if: 1117 * - ASUS_WMI_UNSUPPORTED_METHOD is returned 1118 * - reverved bits are non-zero 1119 * - sfun and presence bit are not set 1120 */ 1121 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000 1122 || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT))) 1123 ok = false; 1124 } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) { 1125 /* If value is zero, something is clearly wrong */ 1126 if (value == 0) 1127 ok = false; 1128 } 1129 1130 return ok ? attr->mode : 0; 1131 } 1132 1133 static struct attribute_group hwmon_attribute_group = { 1134 .is_visible = asus_hwmon_sysfs_is_visible, 1135 .attrs = hwmon_attributes 1136 }; 1137 1138 static void asus_wmi_hwmon_exit(struct asus_wmi *asus) 1139 { 1140 struct device *hwmon; 1141 1142 hwmon = asus->hwmon_device; 1143 if (!hwmon) 1144 return; 1145 sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group); 1146 hwmon_device_unregister(hwmon); 1147 asus->hwmon_device = NULL; 1148 } 1149 1150 static int asus_wmi_hwmon_init(struct asus_wmi *asus) 1151 { 1152 struct device *hwmon; 1153 int result; 1154 1155 hwmon = hwmon_device_register(&asus->platform_device->dev); 1156 if (IS_ERR(hwmon)) { 1157 pr_err("Could not register asus hwmon device\n"); 1158 return PTR_ERR(hwmon); 1159 } 1160 dev_set_drvdata(hwmon, asus); 1161 asus->hwmon_device = hwmon; 1162 result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group); 1163 if (result) 1164 asus_wmi_hwmon_exit(asus); 1165 return result; 1166 } 1167 1168 /* 1169 * Backlight 1170 */ 1171 static int read_backlight_power(struct asus_wmi *asus) 1172 { 1173 int ret; 1174 if (asus->driver->quirks->store_backlight_power) 1175 ret = !asus->driver->panel_power; 1176 else 1177 ret = asus_wmi_get_devstate_simple(asus, 1178 ASUS_WMI_DEVID_BACKLIGHT); 1179 1180 if (ret < 0) 1181 return ret; 1182 1183 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 1184 } 1185 1186 static int read_brightness_max(struct asus_wmi *asus) 1187 { 1188 u32 retval; 1189 int err; 1190 1191 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval); 1192 1193 if (err < 0) 1194 return err; 1195 1196 retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK; 1197 retval >>= 8; 1198 1199 if (!retval) 1200 return -ENODEV; 1201 1202 return retval; 1203 } 1204 1205 static int read_brightness(struct backlight_device *bd) 1206 { 1207 struct asus_wmi *asus = bl_get_data(bd); 1208 u32 retval; 1209 int err; 1210 1211 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval); 1212 1213 if (err < 0) 1214 return err; 1215 1216 return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK; 1217 } 1218 1219 static u32 get_scalar_command(struct backlight_device *bd) 1220 { 1221 struct asus_wmi *asus = bl_get_data(bd); 1222 u32 ctrl_param = 0; 1223 1224 if ((asus->driver->brightness < bd->props.brightness) || 1225 bd->props.brightness == bd->props.max_brightness) 1226 ctrl_param = 0x00008001; 1227 else if ((asus->driver->brightness > bd->props.brightness) || 1228 bd->props.brightness == 0) 1229 ctrl_param = 0x00008000; 1230 1231 asus->driver->brightness = bd->props.brightness; 1232 1233 return ctrl_param; 1234 } 1235 1236 static int update_bl_status(struct backlight_device *bd) 1237 { 1238 struct asus_wmi *asus = bl_get_data(bd); 1239 u32 ctrl_param; 1240 int power, err = 0; 1241 1242 power = read_backlight_power(asus); 1243 if (power != -ENODEV && bd->props.power != power) { 1244 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK); 1245 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, 1246 ctrl_param, NULL); 1247 if (asus->driver->quirks->store_backlight_power) 1248 asus->driver->panel_power = bd->props.power; 1249 1250 /* When using scalar brightness, updating the brightness 1251 * will mess with the backlight power */ 1252 if (asus->driver->quirks->scalar_panel_brightness) 1253 return err; 1254 } 1255 1256 if (asus->driver->quirks->scalar_panel_brightness) 1257 ctrl_param = get_scalar_command(bd); 1258 else 1259 ctrl_param = bd->props.brightness; 1260 1261 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS, 1262 ctrl_param, NULL); 1263 1264 return err; 1265 } 1266 1267 static const struct backlight_ops asus_wmi_bl_ops = { 1268 .get_brightness = read_brightness, 1269 .update_status = update_bl_status, 1270 }; 1271 1272 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code) 1273 { 1274 struct backlight_device *bd = asus->backlight_device; 1275 int old = bd->props.brightness; 1276 int new = old; 1277 1278 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 1279 new = code - NOTIFY_BRNUP_MIN + 1; 1280 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) 1281 new = code - NOTIFY_BRNDOWN_MIN; 1282 1283 bd->props.brightness = new; 1284 backlight_update_status(bd); 1285 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 1286 1287 return old; 1288 } 1289 1290 static int asus_wmi_backlight_init(struct asus_wmi *asus) 1291 { 1292 struct backlight_device *bd; 1293 struct backlight_properties props; 1294 int max; 1295 int power; 1296 1297 max = read_brightness_max(asus); 1298 1299 if (max == -ENODEV) 1300 max = 0; 1301 else if (max < 0) 1302 return max; 1303 1304 power = read_backlight_power(asus); 1305 1306 if (power == -ENODEV) 1307 power = FB_BLANK_UNBLANK; 1308 else if (power < 0) 1309 return power; 1310 1311 memset(&props, 0, sizeof(struct backlight_properties)); 1312 props.type = BACKLIGHT_PLATFORM; 1313 props.max_brightness = max; 1314 bd = backlight_device_register(asus->driver->name, 1315 &asus->platform_device->dev, asus, 1316 &asus_wmi_bl_ops, &props); 1317 if (IS_ERR(bd)) { 1318 pr_err("Could not register backlight device\n"); 1319 return PTR_ERR(bd); 1320 } 1321 1322 asus->backlight_device = bd; 1323 1324 if (asus->driver->quirks->store_backlight_power) 1325 asus->driver->panel_power = power; 1326 1327 bd->props.brightness = read_brightness(bd); 1328 bd->props.power = power; 1329 backlight_update_status(bd); 1330 1331 asus->driver->brightness = bd->props.brightness; 1332 1333 return 0; 1334 } 1335 1336 static void asus_wmi_backlight_exit(struct asus_wmi *asus) 1337 { 1338 if (asus->backlight_device) 1339 backlight_device_unregister(asus->backlight_device); 1340 1341 asus->backlight_device = NULL; 1342 } 1343 1344 static int is_display_toggle(int code) 1345 { 1346 /* display toggle keys */ 1347 if ((code >= 0x61 && code <= 0x67) || 1348 (code >= 0x8c && code <= 0x93) || 1349 (code >= 0xa0 && code <= 0xa7) || 1350 (code >= 0xd0 && code <= 0xd5)) 1351 return 1; 1352 1353 return 0; 1354 } 1355 1356 static void asus_wmi_notify(u32 value, void *context) 1357 { 1358 struct asus_wmi *asus = context; 1359 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; 1360 union acpi_object *obj; 1361 acpi_status status; 1362 int code; 1363 int orig_code; 1364 unsigned int key_value = 1; 1365 bool autorelease = 1; 1366 1367 status = wmi_get_event_data(value, &response); 1368 if (status != AE_OK) { 1369 pr_err("bad event status 0x%x\n", status); 1370 return; 1371 } 1372 1373 obj = (union acpi_object *)response.pointer; 1374 1375 if (!obj || obj->type != ACPI_TYPE_INTEGER) 1376 goto exit; 1377 1378 code = obj->integer.value; 1379 orig_code = code; 1380 1381 if (asus->driver->key_filter) { 1382 asus->driver->key_filter(asus->driver, &code, &key_value, 1383 &autorelease); 1384 if (code == ASUS_WMI_KEY_IGNORE) 1385 goto exit; 1386 } 1387 1388 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 1389 code = ASUS_WMI_BRN_UP; 1390 else if (code >= NOTIFY_BRNDOWN_MIN && 1391 code <= NOTIFY_BRNDOWN_MAX) 1392 code = ASUS_WMI_BRN_DOWN; 1393 1394 if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) { 1395 if (!acpi_video_backlight_support()) { 1396 asus_wmi_backlight_notify(asus, orig_code); 1397 goto exit; 1398 } 1399 } 1400 1401 if (is_display_toggle(code) && 1402 asus->driver->quirks->no_display_toggle) 1403 goto exit; 1404 1405 if (!sparse_keymap_report_event(asus->inputdev, code, 1406 key_value, autorelease)) 1407 pr_info("Unknown key %x pressed\n", code); 1408 1409 exit: 1410 kfree(obj); 1411 } 1412 1413 /* 1414 * Sys helpers 1415 */ 1416 static int parse_arg(const char *buf, unsigned long count, int *val) 1417 { 1418 if (!count) 1419 return 0; 1420 if (sscanf(buf, "%i", val) != 1) 1421 return -EINVAL; 1422 return count; 1423 } 1424 1425 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid, 1426 const char *buf, size_t count) 1427 { 1428 u32 retval; 1429 int rv, err, value; 1430 1431 value = asus_wmi_get_devstate_simple(asus, devid); 1432 if (value == -ENODEV) /* Check device presence */ 1433 return value; 1434 1435 rv = parse_arg(buf, count, &value); 1436 err = asus_wmi_set_devstate(devid, value, &retval); 1437 1438 if (err < 0) 1439 return err; 1440 1441 return rv; 1442 } 1443 1444 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf) 1445 { 1446 int value = asus_wmi_get_devstate_simple(asus, devid); 1447 1448 if (value < 0) 1449 return value; 1450 1451 return sprintf(buf, "%d\n", value); 1452 } 1453 1454 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \ 1455 static ssize_t show_##_name(struct device *dev, \ 1456 struct device_attribute *attr, \ 1457 char *buf) \ 1458 { \ 1459 struct asus_wmi *asus = dev_get_drvdata(dev); \ 1460 \ 1461 return show_sys_wmi(asus, _cm, buf); \ 1462 } \ 1463 static ssize_t store_##_name(struct device *dev, \ 1464 struct device_attribute *attr, \ 1465 const char *buf, size_t count) \ 1466 { \ 1467 struct asus_wmi *asus = dev_get_drvdata(dev); \ 1468 \ 1469 return store_sys_wmi(asus, _cm, buf, count); \ 1470 } \ 1471 static struct device_attribute dev_attr_##_name = { \ 1472 .attr = { \ 1473 .name = __stringify(_name), \ 1474 .mode = _mode }, \ 1475 .show = show_##_name, \ 1476 .store = store_##_name, \ 1477 } 1478 1479 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD); 1480 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA); 1481 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER); 1482 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME); 1483 1484 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, 1485 const char *buf, size_t count) 1486 { 1487 int value, rv; 1488 1489 if (!count || sscanf(buf, "%i", &value) != 1) 1490 return -EINVAL; 1491 if (value < 0 || value > 2) 1492 return -EINVAL; 1493 1494 rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL); 1495 if (rv < 0) 1496 return rv; 1497 1498 return count; 1499 } 1500 1501 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); 1502 1503 static struct attribute *platform_attributes[] = { 1504 &dev_attr_cpufv.attr, 1505 &dev_attr_camera.attr, 1506 &dev_attr_cardr.attr, 1507 &dev_attr_touchpad.attr, 1508 &dev_attr_lid_resume.attr, 1509 NULL 1510 }; 1511 1512 static umode_t asus_sysfs_is_visible(struct kobject *kobj, 1513 struct attribute *attr, int idx) 1514 { 1515 struct device *dev = container_of(kobj, struct device, kobj); 1516 struct platform_device *pdev = to_platform_device(dev); 1517 struct asus_wmi *asus = platform_get_drvdata(pdev); 1518 bool ok = true; 1519 int devid = -1; 1520 1521 if (attr == &dev_attr_camera.attr) 1522 devid = ASUS_WMI_DEVID_CAMERA; 1523 else if (attr == &dev_attr_cardr.attr) 1524 devid = ASUS_WMI_DEVID_CARDREADER; 1525 else if (attr == &dev_attr_touchpad.attr) 1526 devid = ASUS_WMI_DEVID_TOUCHPAD; 1527 else if (attr == &dev_attr_lid_resume.attr) 1528 devid = ASUS_WMI_DEVID_LID_RESUME; 1529 1530 if (devid != -1) 1531 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0); 1532 1533 return ok ? attr->mode : 0; 1534 } 1535 1536 static struct attribute_group platform_attribute_group = { 1537 .is_visible = asus_sysfs_is_visible, 1538 .attrs = platform_attributes 1539 }; 1540 1541 static void asus_wmi_sysfs_exit(struct platform_device *device) 1542 { 1543 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); 1544 } 1545 1546 static int asus_wmi_sysfs_init(struct platform_device *device) 1547 { 1548 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); 1549 } 1550 1551 /* 1552 * Platform device 1553 */ 1554 static int asus_wmi_platform_init(struct asus_wmi *asus) 1555 { 1556 int rv; 1557 1558 /* INIT enable hotkeys on some models */ 1559 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv)) 1560 pr_info("Initialization: %#x", rv); 1561 1562 /* We don't know yet what to do with this version... */ 1563 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) { 1564 pr_info("BIOS WMI version: %d.%d", rv >> 16, rv & 0xFF); 1565 asus->spec = rv; 1566 } 1567 1568 /* 1569 * The SFUN method probably allows the original driver to get the list 1570 * of features supported by a given model. For now, 0x0100 or 0x0800 1571 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. 1572 * The significance of others is yet to be found. 1573 */ 1574 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) { 1575 pr_info("SFUN value: %#x", rv); 1576 asus->sfun = rv; 1577 } 1578 1579 /* 1580 * Eee PC and Notebooks seems to have different method_id for DSTS, 1581 * but it may also be related to the BIOS's SPEC. 1582 * Note, on most Eeepc, there is no way to check if a method exist 1583 * or note, while on notebooks, they returns 0xFFFFFFFE on failure, 1584 * but once again, SPEC may probably be used for that kind of things. 1585 */ 1586 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL)) 1587 asus->dsts_id = ASUS_WMI_METHODID_DSTS; 1588 else 1589 asus->dsts_id = ASUS_WMI_METHODID_DSTS2; 1590 1591 /* CWAP allow to define the behavior of the Fn+F2 key, 1592 * this method doesn't seems to be present on Eee PCs */ 1593 if (asus->driver->quirks->wapf >= 0) 1594 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP, 1595 asus->driver->quirks->wapf, NULL); 1596 1597 return asus_wmi_sysfs_init(asus->platform_device); 1598 } 1599 1600 static void asus_wmi_platform_exit(struct asus_wmi *asus) 1601 { 1602 asus_wmi_sysfs_exit(asus->platform_device); 1603 } 1604 1605 /* 1606 * debugfs 1607 */ 1608 struct asus_wmi_debugfs_node { 1609 struct asus_wmi *asus; 1610 char *name; 1611 int (*show) (struct seq_file *m, void *data); 1612 }; 1613 1614 static int show_dsts(struct seq_file *m, void *data) 1615 { 1616 struct asus_wmi *asus = m->private; 1617 int err; 1618 u32 retval = -1; 1619 1620 err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval); 1621 1622 if (err < 0) 1623 return err; 1624 1625 seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval); 1626 1627 return 0; 1628 } 1629 1630 static int show_devs(struct seq_file *m, void *data) 1631 { 1632 struct asus_wmi *asus = m->private; 1633 int err; 1634 u32 retval = -1; 1635 1636 err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param, 1637 &retval); 1638 1639 if (err < 0) 1640 return err; 1641 1642 seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id, 1643 asus->debug.ctrl_param, retval); 1644 1645 return 0; 1646 } 1647 1648 static int show_call(struct seq_file *m, void *data) 1649 { 1650 struct asus_wmi *asus = m->private; 1651 struct bios_args args = { 1652 .arg0 = asus->debug.dev_id, 1653 .arg1 = asus->debug.ctrl_param, 1654 }; 1655 struct acpi_buffer input = { (acpi_size) sizeof(args), &args }; 1656 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 1657 union acpi_object *obj; 1658 acpi_status status; 1659 1660 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1661 1, asus->debug.method_id, 1662 &input, &output); 1663 1664 if (ACPI_FAILURE(status)) 1665 return -EIO; 1666 1667 obj = (union acpi_object *)output.pointer; 1668 if (obj && obj->type == ACPI_TYPE_INTEGER) 1669 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id, 1670 asus->debug.dev_id, asus->debug.ctrl_param, 1671 (u32) obj->integer.value); 1672 else 1673 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id, 1674 asus->debug.dev_id, asus->debug.ctrl_param, 1675 obj ? obj->type : -1); 1676 1677 kfree(obj); 1678 1679 return 0; 1680 } 1681 1682 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = { 1683 {NULL, "devs", show_devs}, 1684 {NULL, "dsts", show_dsts}, 1685 {NULL, "call", show_call}, 1686 }; 1687 1688 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file) 1689 { 1690 struct asus_wmi_debugfs_node *node = inode->i_private; 1691 1692 return single_open(file, node->show, node->asus); 1693 } 1694 1695 static const struct file_operations asus_wmi_debugfs_io_ops = { 1696 .owner = THIS_MODULE, 1697 .open = asus_wmi_debugfs_open, 1698 .read = seq_read, 1699 .llseek = seq_lseek, 1700 .release = single_release, 1701 }; 1702 1703 static void asus_wmi_debugfs_exit(struct asus_wmi *asus) 1704 { 1705 debugfs_remove_recursive(asus->debug.root); 1706 } 1707 1708 static int asus_wmi_debugfs_init(struct asus_wmi *asus) 1709 { 1710 struct dentry *dent; 1711 int i; 1712 1713 asus->debug.root = debugfs_create_dir(asus->driver->name, NULL); 1714 if (!asus->debug.root) { 1715 pr_err("failed to create debugfs directory"); 1716 goto error_debugfs; 1717 } 1718 1719 dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR, 1720 asus->debug.root, &asus->debug.method_id); 1721 if (!dent) 1722 goto error_debugfs; 1723 1724 dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR, 1725 asus->debug.root, &asus->debug.dev_id); 1726 if (!dent) 1727 goto error_debugfs; 1728 1729 dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR, 1730 asus->debug.root, &asus->debug.ctrl_param); 1731 if (!dent) 1732 goto error_debugfs; 1733 1734 for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) { 1735 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i]; 1736 1737 node->asus = asus; 1738 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, 1739 asus->debug.root, node, 1740 &asus_wmi_debugfs_io_ops); 1741 if (!dent) { 1742 pr_err("failed to create debug file: %s\n", node->name); 1743 goto error_debugfs; 1744 } 1745 } 1746 1747 return 0; 1748 1749 error_debugfs: 1750 asus_wmi_debugfs_exit(asus); 1751 return -ENOMEM; 1752 } 1753 1754 /* 1755 * WMI Driver 1756 */ 1757 static int asus_wmi_add(struct platform_device *pdev) 1758 { 1759 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver); 1760 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv); 1761 struct asus_wmi *asus; 1762 acpi_status status; 1763 int err; 1764 u32 result; 1765 1766 asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL); 1767 if (!asus) 1768 return -ENOMEM; 1769 1770 asus->driver = wdrv; 1771 asus->platform_device = pdev; 1772 wdrv->platform_device = pdev; 1773 platform_set_drvdata(asus->platform_device, asus); 1774 1775 if (wdrv->detect_quirks) 1776 wdrv->detect_quirks(asus->driver); 1777 1778 err = asus_wmi_platform_init(asus); 1779 if (err) 1780 goto fail_platform; 1781 1782 err = asus_wmi_input_init(asus); 1783 if (err) 1784 goto fail_input; 1785 1786 err = asus_wmi_hwmon_init(asus); 1787 if (err) 1788 goto fail_hwmon; 1789 1790 err = asus_wmi_led_init(asus); 1791 if (err) 1792 goto fail_leds; 1793 1794 err = asus_wmi_rfkill_init(asus); 1795 if (err) 1796 goto fail_rfkill; 1797 1798 if (asus->driver->quirks->wmi_backlight_power) 1799 acpi_video_dmi_promote_vendor(); 1800 if (!acpi_video_backlight_support()) { 1801 pr_info("Disabling ACPI video driver\n"); 1802 acpi_video_unregister(); 1803 err = asus_wmi_backlight_init(asus); 1804 if (err && err != -ENODEV) 1805 goto fail_backlight; 1806 } else 1807 pr_info("Backlight controlled by ACPI video driver\n"); 1808 1809 status = wmi_install_notify_handler(asus->driver->event_guid, 1810 asus_wmi_notify, asus); 1811 if (ACPI_FAILURE(status)) { 1812 pr_err("Unable to register notify handler - %d\n", status); 1813 err = -ENODEV; 1814 goto fail_wmi_handler; 1815 } 1816 1817 err = asus_wmi_debugfs_init(asus); 1818 if (err) 1819 goto fail_debugfs; 1820 1821 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result); 1822 if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT)) 1823 asus->driver->wlan_ctrl_by_user = 1; 1824 1825 return 0; 1826 1827 fail_debugfs: 1828 wmi_remove_notify_handler(asus->driver->event_guid); 1829 fail_wmi_handler: 1830 asus_wmi_backlight_exit(asus); 1831 fail_backlight: 1832 asus_wmi_rfkill_exit(asus); 1833 fail_rfkill: 1834 asus_wmi_led_exit(asus); 1835 fail_leds: 1836 asus_wmi_hwmon_exit(asus); 1837 fail_hwmon: 1838 asus_wmi_input_exit(asus); 1839 fail_input: 1840 asus_wmi_platform_exit(asus); 1841 fail_platform: 1842 kfree(asus); 1843 return err; 1844 } 1845 1846 static int asus_wmi_remove(struct platform_device *device) 1847 { 1848 struct asus_wmi *asus; 1849 1850 asus = platform_get_drvdata(device); 1851 wmi_remove_notify_handler(asus->driver->event_guid); 1852 asus_wmi_backlight_exit(asus); 1853 asus_wmi_input_exit(asus); 1854 asus_wmi_hwmon_exit(asus); 1855 asus_wmi_led_exit(asus); 1856 asus_wmi_rfkill_exit(asus); 1857 asus_wmi_debugfs_exit(asus); 1858 asus_wmi_platform_exit(asus); 1859 1860 kfree(asus); 1861 return 0; 1862 } 1863 1864 /* 1865 * Platform driver - hibernate/resume callbacks 1866 */ 1867 static int asus_hotk_thaw(struct device *device) 1868 { 1869 struct asus_wmi *asus = dev_get_drvdata(device); 1870 1871 if (asus->wlan.rfkill) { 1872 bool wlan; 1873 1874 /* 1875 * Work around bios bug - acpi _PTS turns off the wireless led 1876 * during suspend. Normally it restores it on resume, but 1877 * we should kick it ourselves in case hibernation is aborted. 1878 */ 1879 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN); 1880 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL); 1881 } 1882 1883 return 0; 1884 } 1885 1886 static int asus_hotk_restore(struct device *device) 1887 { 1888 struct asus_wmi *asus = dev_get_drvdata(device); 1889 int bl; 1890 1891 /* Refresh both wlan rfkill state and pci hotplug */ 1892 if (asus->wlan.rfkill) 1893 asus_rfkill_hotplug(asus); 1894 1895 if (asus->bluetooth.rfkill) { 1896 bl = !asus_wmi_get_devstate_simple(asus, 1897 ASUS_WMI_DEVID_BLUETOOTH); 1898 rfkill_set_sw_state(asus->bluetooth.rfkill, bl); 1899 } 1900 if (asus->wimax.rfkill) { 1901 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX); 1902 rfkill_set_sw_state(asus->wimax.rfkill, bl); 1903 } 1904 if (asus->wwan3g.rfkill) { 1905 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G); 1906 rfkill_set_sw_state(asus->wwan3g.rfkill, bl); 1907 } 1908 if (asus->gps.rfkill) { 1909 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS); 1910 rfkill_set_sw_state(asus->gps.rfkill, bl); 1911 } 1912 if (asus->uwb.rfkill) { 1913 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB); 1914 rfkill_set_sw_state(asus->uwb.rfkill, bl); 1915 } 1916 1917 return 0; 1918 } 1919 1920 static const struct dev_pm_ops asus_pm_ops = { 1921 .thaw = asus_hotk_thaw, 1922 .restore = asus_hotk_restore, 1923 }; 1924 1925 static int asus_wmi_probe(struct platform_device *pdev) 1926 { 1927 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver); 1928 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv); 1929 int ret; 1930 1931 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) { 1932 pr_warn("Management GUID not found\n"); 1933 return -ENODEV; 1934 } 1935 1936 if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) { 1937 pr_warn("Event GUID not found\n"); 1938 return -ENODEV; 1939 } 1940 1941 if (wdrv->probe) { 1942 ret = wdrv->probe(pdev); 1943 if (ret) 1944 return ret; 1945 } 1946 1947 return asus_wmi_add(pdev); 1948 } 1949 1950 static bool used; 1951 1952 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver) 1953 { 1954 struct platform_driver *platform_driver; 1955 struct platform_device *platform_device; 1956 1957 if (used) 1958 return -EBUSY; 1959 1960 platform_driver = &driver->platform_driver; 1961 platform_driver->remove = asus_wmi_remove; 1962 platform_driver->driver.owner = driver->owner; 1963 platform_driver->driver.name = driver->name; 1964 platform_driver->driver.pm = &asus_pm_ops; 1965 1966 platform_device = platform_create_bundle(platform_driver, 1967 asus_wmi_probe, 1968 NULL, 0, NULL, 0); 1969 if (IS_ERR(platform_device)) 1970 return PTR_ERR(platform_device); 1971 1972 used = true; 1973 return 0; 1974 } 1975 EXPORT_SYMBOL_GPL(asus_wmi_register_driver); 1976 1977 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver) 1978 { 1979 platform_device_unregister(driver->platform_device); 1980 platform_driver_unregister(&driver->platform_driver); 1981 used = false; 1982 } 1983 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver); 1984 1985 static int __init asus_wmi_init(void) 1986 { 1987 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) { 1988 pr_info("Asus Management GUID not found"); 1989 return -ENODEV; 1990 } 1991 1992 pr_info("ASUS WMI generic driver loaded"); 1993 return 0; 1994 } 1995 1996 static void __exit asus_wmi_exit(void) 1997 { 1998 pr_info("ASUS WMI generic driver unloaded"); 1999 } 2000 2001 module_init(asus_wmi_init); 2002 module_exit(asus_wmi_exit); 2003