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 <linux/acpi.h> 49 #include <acpi/video.h> 50 51 #include "asus-wmi.h" 52 53 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, " 54 "Yong Wang <yong.y.wang@intel.com>"); 55 MODULE_DESCRIPTION("Asus Generic WMI Driver"); 56 MODULE_LICENSE("GPL"); 57 58 #define to_platform_driver(drv) \ 59 (container_of((drv), struct platform_driver, driver)) 60 61 #define to_asus_wmi_driver(pdrv) \ 62 (container_of((pdrv), struct asus_wmi_driver, platform_driver)) 63 64 #define ASUS_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66" 65 66 #define NOTIFY_BRNUP_MIN 0x11 67 #define NOTIFY_BRNUP_MAX 0x1f 68 #define NOTIFY_BRNDOWN_MIN 0x20 69 #define NOTIFY_BRNDOWN_MAX 0x2e 70 #define NOTIFY_KBD_BRTUP 0xc4 71 #define NOTIFY_KBD_BRTDWN 0xc5 72 73 /* WMI Methods */ 74 #define ASUS_WMI_METHODID_SPEC 0x43455053 /* BIOS SPECification */ 75 #define ASUS_WMI_METHODID_SFBD 0x44424653 /* Set First Boot Device */ 76 #define ASUS_WMI_METHODID_GLCD 0x44434C47 /* Get LCD status */ 77 #define ASUS_WMI_METHODID_GPID 0x44495047 /* Get Panel ID?? (Resol) */ 78 #define ASUS_WMI_METHODID_QMOD 0x444F4D51 /* Quiet MODe */ 79 #define ASUS_WMI_METHODID_SPLV 0x4C425053 /* Set Panel Light Value */ 80 #define ASUS_WMI_METHODID_SFUN 0x4E554653 /* FUNCtionalities */ 81 #define ASUS_WMI_METHODID_SDSP 0x50534453 /* Set DiSPlay output */ 82 #define ASUS_WMI_METHODID_GDSP 0x50534447 /* Get DiSPlay output */ 83 #define ASUS_WMI_METHODID_DEVP 0x50564544 /* DEVice Policy */ 84 #define ASUS_WMI_METHODID_OSVR 0x5256534F /* OS VeRsion */ 85 #define ASUS_WMI_METHODID_DSTS 0x53544344 /* Device STatuS */ 86 #define ASUS_WMI_METHODID_DSTS2 0x53545344 /* Device STatuS #2*/ 87 #define ASUS_WMI_METHODID_BSTS 0x53545342 /* Bios STatuS ? */ 88 #define ASUS_WMI_METHODID_DEVS 0x53564544 /* DEVice Set */ 89 #define ASUS_WMI_METHODID_CFVS 0x53564643 /* CPU Frequency Volt Set */ 90 #define ASUS_WMI_METHODID_KBFT 0x5446424B /* KeyBoard FilTer */ 91 #define ASUS_WMI_METHODID_INIT 0x54494E49 /* INITialize */ 92 #define ASUS_WMI_METHODID_HKEY 0x59454B48 /* Hot KEY ?? */ 93 94 #define ASUS_WMI_UNSUPPORTED_METHOD 0xFFFFFFFE 95 96 /* Wireless */ 97 #define ASUS_WMI_DEVID_HW_SWITCH 0x00010001 98 #define ASUS_WMI_DEVID_WIRELESS_LED 0x00010002 99 #define ASUS_WMI_DEVID_CWAP 0x00010003 100 #define ASUS_WMI_DEVID_WLAN 0x00010011 101 #define ASUS_WMI_DEVID_WLAN_LED 0x00010012 102 #define ASUS_WMI_DEVID_BLUETOOTH 0x00010013 103 #define ASUS_WMI_DEVID_GPS 0x00010015 104 #define ASUS_WMI_DEVID_WIMAX 0x00010017 105 #define ASUS_WMI_DEVID_WWAN3G 0x00010019 106 #define ASUS_WMI_DEVID_UWB 0x00010021 107 108 /* Leds */ 109 /* 0x000200XX and 0x000400XX */ 110 #define ASUS_WMI_DEVID_LED1 0x00020011 111 #define ASUS_WMI_DEVID_LED2 0x00020012 112 #define ASUS_WMI_DEVID_LED3 0x00020013 113 #define ASUS_WMI_DEVID_LED4 0x00020014 114 #define ASUS_WMI_DEVID_LED5 0x00020015 115 #define ASUS_WMI_DEVID_LED6 0x00020016 116 117 /* Backlight and Brightness */ 118 #define ASUS_WMI_DEVID_BACKLIGHT 0x00050011 119 #define ASUS_WMI_DEVID_BRIGHTNESS 0x00050012 120 #define ASUS_WMI_DEVID_KBD_BACKLIGHT 0x00050021 121 #define ASUS_WMI_DEVID_LIGHT_SENSOR 0x00050022 /* ?? */ 122 123 /* Misc */ 124 #define ASUS_WMI_DEVID_CAMERA 0x00060013 125 126 /* Storage */ 127 #define ASUS_WMI_DEVID_CARDREADER 0x00080013 128 129 /* Input */ 130 #define ASUS_WMI_DEVID_TOUCHPAD 0x00100011 131 #define ASUS_WMI_DEVID_TOUCHPAD_LED 0x00100012 132 133 /* Fan, Thermal */ 134 #define ASUS_WMI_DEVID_THERMAL_CTRL 0x00110011 135 #define ASUS_WMI_DEVID_FAN_CTRL 0x00110012 136 137 /* Power */ 138 #define ASUS_WMI_DEVID_PROCESSOR_STATE 0x00120012 139 140 /* Deep S3 / Resume on LID open */ 141 #define ASUS_WMI_DEVID_LID_RESUME 0x00120031 142 143 /* DSTS masks */ 144 #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001 145 #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002 146 #define ASUS_WMI_DSTS_PRESENCE_BIT 0x00010000 147 #define ASUS_WMI_DSTS_USER_BIT 0x00020000 148 #define ASUS_WMI_DSTS_BIOS_BIT 0x00040000 149 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF 150 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00 151 152 struct bios_args { 153 u32 arg0; 154 u32 arg1; 155 } __packed; 156 157 /* 158 * <platform>/ - debugfs root directory 159 * dev_id - current dev_id 160 * ctrl_param - current ctrl_param 161 * method_id - current method_id 162 * devs - call DEVS(dev_id, ctrl_param) and print result 163 * dsts - call DSTS(dev_id) and print result 164 * call - call method_id(dev_id, ctrl_param) and print result 165 */ 166 struct asus_wmi_debug { 167 struct dentry *root; 168 u32 method_id; 169 u32 dev_id; 170 u32 ctrl_param; 171 }; 172 173 struct asus_rfkill { 174 struct asus_wmi *asus; 175 struct rfkill *rfkill; 176 u32 dev_id; 177 }; 178 179 struct asus_wmi { 180 int dsts_id; 181 int spec; 182 int sfun; 183 184 struct input_dev *inputdev; 185 struct backlight_device *backlight_device; 186 struct platform_device *platform_device; 187 188 struct led_classdev wlan_led; 189 int wlan_led_wk; 190 struct led_classdev tpd_led; 191 int tpd_led_wk; 192 struct led_classdev kbd_led; 193 int kbd_led_wk; 194 struct workqueue_struct *led_workqueue; 195 struct work_struct tpd_led_work; 196 struct work_struct kbd_led_work; 197 struct work_struct wlan_led_work; 198 199 struct asus_rfkill wlan; 200 struct asus_rfkill bluetooth; 201 struct asus_rfkill wimax; 202 struct asus_rfkill wwan3g; 203 struct asus_rfkill gps; 204 struct asus_rfkill uwb; 205 206 struct hotplug_slot *hotplug_slot; 207 struct mutex hotplug_lock; 208 struct mutex wmi_lock; 209 struct workqueue_struct *hotplug_workqueue; 210 struct work_struct hotplug_work; 211 212 struct asus_wmi_debug debug; 213 214 struct asus_wmi_driver *driver; 215 }; 216 217 static int asus_wmi_input_init(struct asus_wmi *asus) 218 { 219 int err; 220 221 asus->inputdev = input_allocate_device(); 222 if (!asus->inputdev) 223 return -ENOMEM; 224 225 asus->inputdev->name = asus->driver->input_name; 226 asus->inputdev->phys = asus->driver->input_phys; 227 asus->inputdev->id.bustype = BUS_HOST; 228 asus->inputdev->dev.parent = &asus->platform_device->dev; 229 set_bit(EV_REP, asus->inputdev->evbit); 230 231 err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL); 232 if (err) 233 goto err_free_dev; 234 235 err = input_register_device(asus->inputdev); 236 if (err) 237 goto err_free_keymap; 238 239 return 0; 240 241 err_free_keymap: 242 sparse_keymap_free(asus->inputdev); 243 err_free_dev: 244 input_free_device(asus->inputdev); 245 return err; 246 } 247 248 static void asus_wmi_input_exit(struct asus_wmi *asus) 249 { 250 if (asus->inputdev) { 251 sparse_keymap_free(asus->inputdev); 252 input_unregister_device(asus->inputdev); 253 } 254 255 asus->inputdev = NULL; 256 } 257 258 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, 259 u32 *retval) 260 { 261 struct bios_args args = { 262 .arg0 = arg0, 263 .arg1 = arg1, 264 }; 265 struct acpi_buffer input = { (acpi_size) sizeof(args), &args }; 266 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 267 acpi_status status; 268 union acpi_object *obj; 269 u32 tmp; 270 271 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id, 272 &input, &output); 273 274 if (ACPI_FAILURE(status)) 275 goto exit; 276 277 obj = (union acpi_object *)output.pointer; 278 if (obj && obj->type == ACPI_TYPE_INTEGER) 279 tmp = (u32) obj->integer.value; 280 else 281 tmp = 0; 282 283 if (retval) 284 *retval = tmp; 285 286 kfree(obj); 287 288 exit: 289 if (ACPI_FAILURE(status)) 290 return -EIO; 291 292 if (tmp == ASUS_WMI_UNSUPPORTED_METHOD) 293 return -ENODEV; 294 295 return 0; 296 } 297 298 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval) 299 { 300 return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval); 301 } 302 303 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, 304 u32 *retval) 305 { 306 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id, 307 ctrl_param, retval); 308 } 309 310 /* Helper for special devices with magic return codes */ 311 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus, 312 u32 dev_id, u32 mask) 313 { 314 u32 retval = 0; 315 int err; 316 317 err = asus_wmi_get_devstate(asus, dev_id, &retval); 318 319 if (err < 0) 320 return err; 321 322 if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT)) 323 return -ENODEV; 324 325 if (mask == ASUS_WMI_DSTS_STATUS_BIT) { 326 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT) 327 return -ENODEV; 328 } 329 330 return retval & mask; 331 } 332 333 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id) 334 { 335 return asus_wmi_get_devstate_bits(asus, dev_id, 336 ASUS_WMI_DSTS_STATUS_BIT); 337 } 338 339 /* 340 * LEDs 341 */ 342 /* 343 * These functions actually update the LED's, and are called from a 344 * workqueue. By doing this as separate work rather than when the LED 345 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 346 * potentially bad time, such as a timer interrupt. 347 */ 348 static void tpd_led_update(struct work_struct *work) 349 { 350 int ctrl_param; 351 struct asus_wmi *asus; 352 353 asus = container_of(work, struct asus_wmi, tpd_led_work); 354 355 ctrl_param = asus->tpd_led_wk; 356 asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL); 357 } 358 359 static void tpd_led_set(struct led_classdev *led_cdev, 360 enum led_brightness value) 361 { 362 struct asus_wmi *asus; 363 364 asus = container_of(led_cdev, struct asus_wmi, tpd_led); 365 366 asus->tpd_led_wk = !!value; 367 queue_work(asus->led_workqueue, &asus->tpd_led_work); 368 } 369 370 static int read_tpd_led_state(struct asus_wmi *asus) 371 { 372 return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED); 373 } 374 375 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 376 { 377 struct asus_wmi *asus; 378 379 asus = container_of(led_cdev, struct asus_wmi, tpd_led); 380 381 return read_tpd_led_state(asus); 382 } 383 384 static void kbd_led_update(struct work_struct *work) 385 { 386 int ctrl_param = 0; 387 struct asus_wmi *asus; 388 389 asus = container_of(work, struct asus_wmi, kbd_led_work); 390 391 /* 392 * bits 0-2: level 393 * bit 7: light on/off 394 */ 395 if (asus->kbd_led_wk > 0) 396 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F); 397 398 asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL); 399 } 400 401 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env) 402 { 403 int retval; 404 405 /* 406 * bits 0-2: level 407 * bit 7: light on/off 408 * bit 8-10: environment (0: dark, 1: normal, 2: light) 409 * bit 17: status unknown 410 */ 411 retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT, 412 0xFFFF); 413 414 /* Unknown status is considered as off */ 415 if (retval == 0x8000) 416 retval = 0; 417 418 if (retval >= 0) { 419 if (level) 420 *level = retval & 0x7F; 421 if (env) 422 *env = (retval >> 8) & 0x7F; 423 retval = 0; 424 } 425 426 return retval; 427 } 428 429 static void kbd_led_set(struct led_classdev *led_cdev, 430 enum led_brightness value) 431 { 432 struct asus_wmi *asus; 433 434 asus = container_of(led_cdev, struct asus_wmi, kbd_led); 435 436 if (value > asus->kbd_led.max_brightness) 437 value = asus->kbd_led.max_brightness; 438 else if (value < 0) 439 value = 0; 440 441 asus->kbd_led_wk = value; 442 queue_work(asus->led_workqueue, &asus->kbd_led_work); 443 } 444 445 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev) 446 { 447 struct asus_wmi *asus; 448 int retval, value; 449 450 asus = container_of(led_cdev, struct asus_wmi, kbd_led); 451 452 retval = kbd_led_read(asus, &value, NULL); 453 454 if (retval < 0) 455 return retval; 456 457 return value; 458 } 459 460 static int wlan_led_unknown_state(struct asus_wmi *asus) 461 { 462 u32 result; 463 464 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result); 465 466 return result & ASUS_WMI_DSTS_UNKNOWN_BIT; 467 } 468 469 static int wlan_led_presence(struct asus_wmi *asus) 470 { 471 u32 result; 472 473 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result); 474 475 return result & ASUS_WMI_DSTS_PRESENCE_BIT; 476 } 477 478 static void wlan_led_update(struct work_struct *work) 479 { 480 int ctrl_param; 481 struct asus_wmi *asus; 482 483 asus = container_of(work, struct asus_wmi, wlan_led_work); 484 485 ctrl_param = asus->wlan_led_wk; 486 asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL); 487 } 488 489 static void wlan_led_set(struct led_classdev *led_cdev, 490 enum led_brightness value) 491 { 492 struct asus_wmi *asus; 493 494 asus = container_of(led_cdev, struct asus_wmi, wlan_led); 495 496 asus->wlan_led_wk = !!value; 497 queue_work(asus->led_workqueue, &asus->wlan_led_work); 498 } 499 500 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev) 501 { 502 struct asus_wmi *asus; 503 u32 result; 504 505 asus = container_of(led_cdev, struct asus_wmi, wlan_led); 506 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result); 507 508 return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK; 509 } 510 511 static void asus_wmi_led_exit(struct asus_wmi *asus) 512 { 513 if (!IS_ERR_OR_NULL(asus->kbd_led.dev)) 514 led_classdev_unregister(&asus->kbd_led); 515 if (!IS_ERR_OR_NULL(asus->tpd_led.dev)) 516 led_classdev_unregister(&asus->tpd_led); 517 if (!IS_ERR_OR_NULL(asus->wlan_led.dev)) 518 led_classdev_unregister(&asus->wlan_led); 519 if (asus->led_workqueue) 520 destroy_workqueue(asus->led_workqueue); 521 } 522 523 static int asus_wmi_led_init(struct asus_wmi *asus) 524 { 525 int rv = 0; 526 527 asus->led_workqueue = create_singlethread_workqueue("led_workqueue"); 528 if (!asus->led_workqueue) 529 return -ENOMEM; 530 531 if (read_tpd_led_state(asus) >= 0) { 532 INIT_WORK(&asus->tpd_led_work, tpd_led_update); 533 534 asus->tpd_led.name = "asus::touchpad"; 535 asus->tpd_led.brightness_set = tpd_led_set; 536 asus->tpd_led.brightness_get = tpd_led_get; 537 asus->tpd_led.max_brightness = 1; 538 539 rv = led_classdev_register(&asus->platform_device->dev, 540 &asus->tpd_led); 541 if (rv) 542 goto error; 543 } 544 545 if (kbd_led_read(asus, NULL, NULL) >= 0) { 546 INIT_WORK(&asus->kbd_led_work, kbd_led_update); 547 548 asus->kbd_led.name = "asus::kbd_backlight"; 549 asus->kbd_led.brightness_set = kbd_led_set; 550 asus->kbd_led.brightness_get = kbd_led_get; 551 asus->kbd_led.max_brightness = 3; 552 553 rv = led_classdev_register(&asus->platform_device->dev, 554 &asus->kbd_led); 555 if (rv) 556 goto error; 557 } 558 559 if (wlan_led_presence(asus) && (asus->driver->quirks->wapf == 4)) { 560 INIT_WORK(&asus->wlan_led_work, wlan_led_update); 561 562 asus->wlan_led.name = "asus::wlan"; 563 asus->wlan_led.brightness_set = wlan_led_set; 564 if (!wlan_led_unknown_state(asus)) 565 asus->wlan_led.brightness_get = wlan_led_get; 566 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME; 567 asus->wlan_led.max_brightness = 1; 568 asus->wlan_led.default_trigger = "asus-wlan"; 569 570 rv = led_classdev_register(&asus->platform_device->dev, 571 &asus->wlan_led); 572 } 573 574 error: 575 if (rv) 576 asus_wmi_led_exit(asus); 577 578 return rv; 579 } 580 581 582 /* 583 * PCI hotplug (for wlan rfkill) 584 */ 585 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus) 586 { 587 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN); 588 589 if (result < 0) 590 return false; 591 return !result; 592 } 593 594 static void asus_rfkill_hotplug(struct asus_wmi *asus) 595 { 596 struct pci_dev *dev; 597 struct pci_bus *bus; 598 bool blocked; 599 bool absent; 600 u32 l; 601 602 mutex_lock(&asus->wmi_lock); 603 blocked = asus_wlan_rfkill_blocked(asus); 604 mutex_unlock(&asus->wmi_lock); 605 606 mutex_lock(&asus->hotplug_lock); 607 pci_lock_rescan_remove(); 608 609 if (asus->wlan.rfkill) 610 rfkill_set_sw_state(asus->wlan.rfkill, blocked); 611 612 if (asus->hotplug_slot) { 613 bus = pci_find_bus(0, 1); 614 if (!bus) { 615 pr_warn("Unable to find PCI bus 1?\n"); 616 goto out_unlock; 617 } 618 619 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 620 pr_err("Unable to read PCI config space?\n"); 621 goto out_unlock; 622 } 623 absent = (l == 0xffffffff); 624 625 if (blocked != absent) { 626 pr_warn("BIOS says wireless lan is %s, " 627 "but the pci device is %s\n", 628 blocked ? "blocked" : "unblocked", 629 absent ? "absent" : "present"); 630 pr_warn("skipped wireless hotplug as probably " 631 "inappropriate for this model\n"); 632 goto out_unlock; 633 } 634 635 if (!blocked) { 636 dev = pci_get_slot(bus, 0); 637 if (dev) { 638 /* Device already present */ 639 pci_dev_put(dev); 640 goto out_unlock; 641 } 642 dev = pci_scan_single_device(bus, 0); 643 if (dev) { 644 pci_bus_assign_resources(bus); 645 if (pci_bus_add_device(dev)) 646 pr_err("Unable to hotplug wifi\n"); 647 } 648 } else { 649 dev = pci_get_slot(bus, 0); 650 if (dev) { 651 pci_stop_and_remove_bus_device(dev); 652 pci_dev_put(dev); 653 } 654 } 655 } 656 657 out_unlock: 658 pci_unlock_rescan_remove(); 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 (asus->driver->quirks->wapf == 4)) 891 rfkill_set_led_trigger_name(*rfkill, "asus-wlan"); 892 893 rfkill_init_sw_state(*rfkill, !result); 894 result = rfkill_register(*rfkill); 895 if (result) { 896 rfkill_destroy(*rfkill); 897 *rfkill = NULL; 898 return result; 899 } 900 return 0; 901 } 902 903 static void asus_wmi_rfkill_exit(struct asus_wmi *asus) 904 { 905 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5"); 906 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6"); 907 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7"); 908 if (asus->wlan.rfkill) { 909 rfkill_unregister(asus->wlan.rfkill); 910 rfkill_destroy(asus->wlan.rfkill); 911 asus->wlan.rfkill = NULL; 912 } 913 /* 914 * Refresh pci hotplug in case the rfkill state was changed after 915 * asus_unregister_rfkill_notifier() 916 */ 917 asus_rfkill_hotplug(asus); 918 if (asus->hotplug_slot) 919 pci_hp_deregister(asus->hotplug_slot); 920 if (asus->hotplug_workqueue) 921 destroy_workqueue(asus->hotplug_workqueue); 922 923 if (asus->bluetooth.rfkill) { 924 rfkill_unregister(asus->bluetooth.rfkill); 925 rfkill_destroy(asus->bluetooth.rfkill); 926 asus->bluetooth.rfkill = NULL; 927 } 928 if (asus->wimax.rfkill) { 929 rfkill_unregister(asus->wimax.rfkill); 930 rfkill_destroy(asus->wimax.rfkill); 931 asus->wimax.rfkill = NULL; 932 } 933 if (asus->wwan3g.rfkill) { 934 rfkill_unregister(asus->wwan3g.rfkill); 935 rfkill_destroy(asus->wwan3g.rfkill); 936 asus->wwan3g.rfkill = NULL; 937 } 938 if (asus->gps.rfkill) { 939 rfkill_unregister(asus->gps.rfkill); 940 rfkill_destroy(asus->gps.rfkill); 941 asus->gps.rfkill = NULL; 942 } 943 if (asus->uwb.rfkill) { 944 rfkill_unregister(asus->uwb.rfkill); 945 rfkill_destroy(asus->uwb.rfkill); 946 asus->uwb.rfkill = NULL; 947 } 948 } 949 950 static int asus_wmi_rfkill_init(struct asus_wmi *asus) 951 { 952 int result = 0; 953 954 mutex_init(&asus->hotplug_lock); 955 mutex_init(&asus->wmi_lock); 956 957 result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan", 958 RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN); 959 960 if (result && result != -ENODEV) 961 goto exit; 962 963 result = asus_new_rfkill(asus, &asus->bluetooth, 964 "asus-bluetooth", RFKILL_TYPE_BLUETOOTH, 965 ASUS_WMI_DEVID_BLUETOOTH); 966 967 if (result && result != -ENODEV) 968 goto exit; 969 970 result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax", 971 RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX); 972 973 if (result && result != -ENODEV) 974 goto exit; 975 976 result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g", 977 RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G); 978 979 if (result && result != -ENODEV) 980 goto exit; 981 982 result = asus_new_rfkill(asus, &asus->gps, "asus-gps", 983 RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS); 984 985 if (result && result != -ENODEV) 986 goto exit; 987 988 result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb", 989 RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB); 990 991 if (result && result != -ENODEV) 992 goto exit; 993 994 if (!asus->driver->quirks->hotplug_wireless) 995 goto exit; 996 997 result = asus_setup_pci_hotplug(asus); 998 /* 999 * If we get -EBUSY then something else is handling the PCI hotplug - 1000 * don't fail in this case 1001 */ 1002 if (result == -EBUSY) 1003 result = 0; 1004 1005 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5"); 1006 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6"); 1007 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7"); 1008 /* 1009 * Refresh pci hotplug in case the rfkill state was changed during 1010 * setup. 1011 */ 1012 asus_rfkill_hotplug(asus); 1013 1014 exit: 1015 if (result && result != -ENODEV) 1016 asus_wmi_rfkill_exit(asus); 1017 1018 if (result == -ENODEV) 1019 result = 0; 1020 1021 return result; 1022 } 1023 1024 /* 1025 * Hwmon device 1026 */ 1027 static ssize_t asus_hwmon_pwm1(struct device *dev, 1028 struct device_attribute *attr, 1029 char *buf) 1030 { 1031 struct asus_wmi *asus = dev_get_drvdata(dev); 1032 u32 value; 1033 int err; 1034 1035 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value); 1036 1037 if (err < 0) 1038 return err; 1039 1040 value &= 0xFF; 1041 1042 if (value == 1) /* Low Speed */ 1043 value = 85; 1044 else if (value == 2) 1045 value = 170; 1046 else if (value == 3) 1047 value = 255; 1048 else if (value != 0) { 1049 pr_err("Unknown fan speed %#x\n", value); 1050 value = -1; 1051 } 1052 1053 return sprintf(buf, "%d\n", value); 1054 } 1055 1056 static ssize_t asus_hwmon_temp1(struct device *dev, 1057 struct device_attribute *attr, 1058 char *buf) 1059 { 1060 struct asus_wmi *asus = dev_get_drvdata(dev); 1061 u32 value; 1062 int err; 1063 1064 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value); 1065 1066 if (err < 0) 1067 return err; 1068 1069 value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000; 1070 1071 return sprintf(buf, "%d\n", value); 1072 } 1073 1074 static DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL); 1075 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL); 1076 1077 static struct attribute *hwmon_attributes[] = { 1078 &dev_attr_pwm1.attr, 1079 &dev_attr_temp1_input.attr, 1080 NULL 1081 }; 1082 1083 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj, 1084 struct attribute *attr, int idx) 1085 { 1086 struct device *dev = container_of(kobj, struct device, kobj); 1087 struct platform_device *pdev = to_platform_device(dev->parent); 1088 struct asus_wmi *asus = platform_get_drvdata(pdev); 1089 bool ok = true; 1090 int dev_id = -1; 1091 u32 value = ASUS_WMI_UNSUPPORTED_METHOD; 1092 1093 if (attr == &dev_attr_pwm1.attr) 1094 dev_id = ASUS_WMI_DEVID_FAN_CTRL; 1095 else if (attr == &dev_attr_temp1_input.attr) 1096 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL; 1097 1098 if (dev_id != -1) { 1099 int err = asus_wmi_get_devstate(asus, dev_id, &value); 1100 1101 if (err < 0) 1102 return 0; /* can't return negative here */ 1103 } 1104 1105 if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) { 1106 /* 1107 * We need to find a better way, probably using sfun, 1108 * bits or spec ... 1109 * Currently we disable it if: 1110 * - ASUS_WMI_UNSUPPORTED_METHOD is returned 1111 * - reverved bits are non-zero 1112 * - sfun and presence bit are not set 1113 */ 1114 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000 1115 || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT))) 1116 ok = false; 1117 } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) { 1118 /* If value is zero, something is clearly wrong */ 1119 if (value == 0) 1120 ok = false; 1121 } 1122 1123 return ok ? attr->mode : 0; 1124 } 1125 1126 static struct attribute_group hwmon_attribute_group = { 1127 .is_visible = asus_hwmon_sysfs_is_visible, 1128 .attrs = hwmon_attributes 1129 }; 1130 __ATTRIBUTE_GROUPS(hwmon_attribute); 1131 1132 static int asus_wmi_hwmon_init(struct asus_wmi *asus) 1133 { 1134 struct device *hwmon; 1135 1136 hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev, 1137 "asus", asus, 1138 hwmon_attribute_groups); 1139 if (IS_ERR(hwmon)) { 1140 pr_err("Could not register asus hwmon device\n"); 1141 return PTR_ERR(hwmon); 1142 } 1143 return 0; 1144 } 1145 1146 /* 1147 * Backlight 1148 */ 1149 static int read_backlight_power(struct asus_wmi *asus) 1150 { 1151 int ret; 1152 if (asus->driver->quirks->store_backlight_power) 1153 ret = !asus->driver->panel_power; 1154 else 1155 ret = asus_wmi_get_devstate_simple(asus, 1156 ASUS_WMI_DEVID_BACKLIGHT); 1157 1158 if (ret < 0) 1159 return ret; 1160 1161 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 1162 } 1163 1164 static int read_brightness_max(struct asus_wmi *asus) 1165 { 1166 u32 retval; 1167 int err; 1168 1169 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval); 1170 1171 if (err < 0) 1172 return err; 1173 1174 retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK; 1175 retval >>= 8; 1176 1177 if (!retval) 1178 return -ENODEV; 1179 1180 return retval; 1181 } 1182 1183 static int read_brightness(struct backlight_device *bd) 1184 { 1185 struct asus_wmi *asus = bl_get_data(bd); 1186 u32 retval; 1187 int err; 1188 1189 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval); 1190 1191 if (err < 0) 1192 return err; 1193 1194 return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK; 1195 } 1196 1197 static u32 get_scalar_command(struct backlight_device *bd) 1198 { 1199 struct asus_wmi *asus = bl_get_data(bd); 1200 u32 ctrl_param = 0; 1201 1202 if ((asus->driver->brightness < bd->props.brightness) || 1203 bd->props.brightness == bd->props.max_brightness) 1204 ctrl_param = 0x00008001; 1205 else if ((asus->driver->brightness > bd->props.brightness) || 1206 bd->props.brightness == 0) 1207 ctrl_param = 0x00008000; 1208 1209 asus->driver->brightness = bd->props.brightness; 1210 1211 return ctrl_param; 1212 } 1213 1214 static int update_bl_status(struct backlight_device *bd) 1215 { 1216 struct asus_wmi *asus = bl_get_data(bd); 1217 u32 ctrl_param; 1218 int power, err = 0; 1219 1220 power = read_backlight_power(asus); 1221 if (power != -ENODEV && bd->props.power != power) { 1222 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK); 1223 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, 1224 ctrl_param, NULL); 1225 if (asus->driver->quirks->store_backlight_power) 1226 asus->driver->panel_power = bd->props.power; 1227 1228 /* When using scalar brightness, updating the brightness 1229 * will mess with the backlight power */ 1230 if (asus->driver->quirks->scalar_panel_brightness) 1231 return err; 1232 } 1233 1234 if (asus->driver->quirks->scalar_panel_brightness) 1235 ctrl_param = get_scalar_command(bd); 1236 else 1237 ctrl_param = bd->props.brightness; 1238 1239 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS, 1240 ctrl_param, NULL); 1241 1242 return err; 1243 } 1244 1245 static const struct backlight_ops asus_wmi_bl_ops = { 1246 .get_brightness = read_brightness, 1247 .update_status = update_bl_status, 1248 }; 1249 1250 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code) 1251 { 1252 struct backlight_device *bd = asus->backlight_device; 1253 int old = bd->props.brightness; 1254 int new = old; 1255 1256 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 1257 new = code - NOTIFY_BRNUP_MIN + 1; 1258 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) 1259 new = code - NOTIFY_BRNDOWN_MIN; 1260 1261 bd->props.brightness = new; 1262 backlight_update_status(bd); 1263 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 1264 1265 return old; 1266 } 1267 1268 static int asus_wmi_backlight_init(struct asus_wmi *asus) 1269 { 1270 struct backlight_device *bd; 1271 struct backlight_properties props; 1272 int max; 1273 int power; 1274 1275 max = read_brightness_max(asus); 1276 1277 if (max == -ENODEV) 1278 max = 0; 1279 else if (max < 0) 1280 return max; 1281 1282 power = read_backlight_power(asus); 1283 1284 if (power == -ENODEV) 1285 power = FB_BLANK_UNBLANK; 1286 else if (power < 0) 1287 return power; 1288 1289 memset(&props, 0, sizeof(struct backlight_properties)); 1290 props.type = BACKLIGHT_PLATFORM; 1291 props.max_brightness = max; 1292 bd = backlight_device_register(asus->driver->name, 1293 &asus->platform_device->dev, asus, 1294 &asus_wmi_bl_ops, &props); 1295 if (IS_ERR(bd)) { 1296 pr_err("Could not register backlight device\n"); 1297 return PTR_ERR(bd); 1298 } 1299 1300 asus->backlight_device = bd; 1301 1302 if (asus->driver->quirks->store_backlight_power) 1303 asus->driver->panel_power = power; 1304 1305 bd->props.brightness = read_brightness(bd); 1306 bd->props.power = power; 1307 backlight_update_status(bd); 1308 1309 asus->driver->brightness = bd->props.brightness; 1310 1311 return 0; 1312 } 1313 1314 static void asus_wmi_backlight_exit(struct asus_wmi *asus) 1315 { 1316 if (asus->backlight_device) 1317 backlight_device_unregister(asus->backlight_device); 1318 1319 asus->backlight_device = NULL; 1320 } 1321 1322 static int is_display_toggle(int code) 1323 { 1324 /* display toggle keys */ 1325 if ((code >= 0x61 && code <= 0x67) || 1326 (code >= 0x8c && code <= 0x93) || 1327 (code >= 0xa0 && code <= 0xa7) || 1328 (code >= 0xd0 && code <= 0xd5)) 1329 return 1; 1330 1331 return 0; 1332 } 1333 1334 static void asus_wmi_notify(u32 value, void *context) 1335 { 1336 struct asus_wmi *asus = context; 1337 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; 1338 union acpi_object *obj; 1339 acpi_status status; 1340 int code; 1341 int orig_code; 1342 unsigned int key_value = 1; 1343 bool autorelease = 1; 1344 1345 status = wmi_get_event_data(value, &response); 1346 if (status != AE_OK) { 1347 pr_err("bad event status 0x%x\n", status); 1348 return; 1349 } 1350 1351 obj = (union acpi_object *)response.pointer; 1352 1353 if (!obj || obj->type != ACPI_TYPE_INTEGER) 1354 goto exit; 1355 1356 code = obj->integer.value; 1357 orig_code = code; 1358 1359 if (asus->driver->key_filter) { 1360 asus->driver->key_filter(asus->driver, &code, &key_value, 1361 &autorelease); 1362 if (code == ASUS_WMI_KEY_IGNORE) 1363 goto exit; 1364 } 1365 1366 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 1367 code = ASUS_WMI_BRN_UP; 1368 else if (code >= NOTIFY_BRNDOWN_MIN && 1369 code <= NOTIFY_BRNDOWN_MAX) 1370 code = ASUS_WMI_BRN_DOWN; 1371 1372 if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) { 1373 if (!acpi_video_backlight_support()) { 1374 asus_wmi_backlight_notify(asus, orig_code); 1375 goto exit; 1376 } 1377 } 1378 1379 if (is_display_toggle(code) && 1380 asus->driver->quirks->no_display_toggle) 1381 goto exit; 1382 1383 if (!sparse_keymap_report_event(asus->inputdev, code, 1384 key_value, autorelease)) 1385 pr_info("Unknown key %x pressed\n", code); 1386 1387 exit: 1388 kfree(obj); 1389 } 1390 1391 /* 1392 * Sys helpers 1393 */ 1394 static int parse_arg(const char *buf, unsigned long count, int *val) 1395 { 1396 if (!count) 1397 return 0; 1398 if (sscanf(buf, "%i", val) != 1) 1399 return -EINVAL; 1400 return count; 1401 } 1402 1403 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid, 1404 const char *buf, size_t count) 1405 { 1406 u32 retval; 1407 int rv, err, value; 1408 1409 value = asus_wmi_get_devstate_simple(asus, devid); 1410 if (value == -ENODEV) /* Check device presence */ 1411 return value; 1412 1413 rv = parse_arg(buf, count, &value); 1414 err = asus_wmi_set_devstate(devid, value, &retval); 1415 1416 if (err < 0) 1417 return err; 1418 1419 return rv; 1420 } 1421 1422 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf) 1423 { 1424 int value = asus_wmi_get_devstate_simple(asus, devid); 1425 1426 if (value < 0) 1427 return value; 1428 1429 return sprintf(buf, "%d\n", value); 1430 } 1431 1432 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \ 1433 static ssize_t show_##_name(struct device *dev, \ 1434 struct device_attribute *attr, \ 1435 char *buf) \ 1436 { \ 1437 struct asus_wmi *asus = dev_get_drvdata(dev); \ 1438 \ 1439 return show_sys_wmi(asus, _cm, buf); \ 1440 } \ 1441 static ssize_t store_##_name(struct device *dev, \ 1442 struct device_attribute *attr, \ 1443 const char *buf, size_t count) \ 1444 { \ 1445 struct asus_wmi *asus = dev_get_drvdata(dev); \ 1446 \ 1447 return store_sys_wmi(asus, _cm, buf, count); \ 1448 } \ 1449 static struct device_attribute dev_attr_##_name = { \ 1450 .attr = { \ 1451 .name = __stringify(_name), \ 1452 .mode = _mode }, \ 1453 .show = show_##_name, \ 1454 .store = store_##_name, \ 1455 } 1456 1457 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD); 1458 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA); 1459 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER); 1460 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME); 1461 1462 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, 1463 const char *buf, size_t count) 1464 { 1465 int value, rv; 1466 1467 if (!count || sscanf(buf, "%i", &value) != 1) 1468 return -EINVAL; 1469 if (value < 0 || value > 2) 1470 return -EINVAL; 1471 1472 rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL); 1473 if (rv < 0) 1474 return rv; 1475 1476 return count; 1477 } 1478 1479 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); 1480 1481 static struct attribute *platform_attributes[] = { 1482 &dev_attr_cpufv.attr, 1483 &dev_attr_camera.attr, 1484 &dev_attr_cardr.attr, 1485 &dev_attr_touchpad.attr, 1486 &dev_attr_lid_resume.attr, 1487 NULL 1488 }; 1489 1490 static umode_t asus_sysfs_is_visible(struct kobject *kobj, 1491 struct attribute *attr, int idx) 1492 { 1493 struct device *dev = container_of(kobj, struct device, kobj); 1494 struct platform_device *pdev = to_platform_device(dev); 1495 struct asus_wmi *asus = platform_get_drvdata(pdev); 1496 bool ok = true; 1497 int devid = -1; 1498 1499 if (attr == &dev_attr_camera.attr) 1500 devid = ASUS_WMI_DEVID_CAMERA; 1501 else if (attr == &dev_attr_cardr.attr) 1502 devid = ASUS_WMI_DEVID_CARDREADER; 1503 else if (attr == &dev_attr_touchpad.attr) 1504 devid = ASUS_WMI_DEVID_TOUCHPAD; 1505 else if (attr == &dev_attr_lid_resume.attr) 1506 devid = ASUS_WMI_DEVID_LID_RESUME; 1507 1508 if (devid != -1) 1509 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0); 1510 1511 return ok ? attr->mode : 0; 1512 } 1513 1514 static struct attribute_group platform_attribute_group = { 1515 .is_visible = asus_sysfs_is_visible, 1516 .attrs = platform_attributes 1517 }; 1518 1519 static void asus_wmi_sysfs_exit(struct platform_device *device) 1520 { 1521 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); 1522 } 1523 1524 static int asus_wmi_sysfs_init(struct platform_device *device) 1525 { 1526 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); 1527 } 1528 1529 /* 1530 * Platform device 1531 */ 1532 static int asus_wmi_platform_init(struct asus_wmi *asus) 1533 { 1534 int rv; 1535 1536 /* INIT enable hotkeys on some models */ 1537 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv)) 1538 pr_info("Initialization: %#x\n", rv); 1539 1540 /* We don't know yet what to do with this version... */ 1541 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) { 1542 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF); 1543 asus->spec = rv; 1544 } 1545 1546 /* 1547 * The SFUN method probably allows the original driver to get the list 1548 * of features supported by a given model. For now, 0x0100 or 0x0800 1549 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. 1550 * The significance of others is yet to be found. 1551 */ 1552 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) { 1553 pr_info("SFUN value: %#x\n", rv); 1554 asus->sfun = rv; 1555 } 1556 1557 /* 1558 * Eee PC and Notebooks seems to have different method_id for DSTS, 1559 * but it may also be related to the BIOS's SPEC. 1560 * Note, on most Eeepc, there is no way to check if a method exist 1561 * or note, while on notebooks, they returns 0xFFFFFFFE on failure, 1562 * but once again, SPEC may probably be used for that kind of things. 1563 */ 1564 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL)) 1565 asus->dsts_id = ASUS_WMI_METHODID_DSTS; 1566 else 1567 asus->dsts_id = ASUS_WMI_METHODID_DSTS2; 1568 1569 /* CWAP allow to define the behavior of the Fn+F2 key, 1570 * this method doesn't seems to be present on Eee PCs */ 1571 if (asus->driver->quirks->wapf >= 0) 1572 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP, 1573 asus->driver->quirks->wapf, NULL); 1574 1575 return asus_wmi_sysfs_init(asus->platform_device); 1576 } 1577 1578 static void asus_wmi_platform_exit(struct asus_wmi *asus) 1579 { 1580 asus_wmi_sysfs_exit(asus->platform_device); 1581 } 1582 1583 /* 1584 * debugfs 1585 */ 1586 struct asus_wmi_debugfs_node { 1587 struct asus_wmi *asus; 1588 char *name; 1589 int (*show) (struct seq_file *m, void *data); 1590 }; 1591 1592 static int show_dsts(struct seq_file *m, void *data) 1593 { 1594 struct asus_wmi *asus = m->private; 1595 int err; 1596 u32 retval = -1; 1597 1598 err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval); 1599 1600 if (err < 0) 1601 return err; 1602 1603 seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval); 1604 1605 return 0; 1606 } 1607 1608 static int show_devs(struct seq_file *m, void *data) 1609 { 1610 struct asus_wmi *asus = m->private; 1611 int err; 1612 u32 retval = -1; 1613 1614 err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param, 1615 &retval); 1616 1617 if (err < 0) 1618 return err; 1619 1620 seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id, 1621 asus->debug.ctrl_param, retval); 1622 1623 return 0; 1624 } 1625 1626 static int show_call(struct seq_file *m, void *data) 1627 { 1628 struct asus_wmi *asus = m->private; 1629 struct bios_args args = { 1630 .arg0 = asus->debug.dev_id, 1631 .arg1 = asus->debug.ctrl_param, 1632 }; 1633 struct acpi_buffer input = { (acpi_size) sizeof(args), &args }; 1634 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 1635 union acpi_object *obj; 1636 acpi_status status; 1637 1638 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1639 1, asus->debug.method_id, 1640 &input, &output); 1641 1642 if (ACPI_FAILURE(status)) 1643 return -EIO; 1644 1645 obj = (union acpi_object *)output.pointer; 1646 if (obj && obj->type == ACPI_TYPE_INTEGER) 1647 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id, 1648 asus->debug.dev_id, asus->debug.ctrl_param, 1649 (u32) obj->integer.value); 1650 else 1651 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id, 1652 asus->debug.dev_id, asus->debug.ctrl_param, 1653 obj ? obj->type : -1); 1654 1655 kfree(obj); 1656 1657 return 0; 1658 } 1659 1660 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = { 1661 {NULL, "devs", show_devs}, 1662 {NULL, "dsts", show_dsts}, 1663 {NULL, "call", show_call}, 1664 }; 1665 1666 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file) 1667 { 1668 struct asus_wmi_debugfs_node *node = inode->i_private; 1669 1670 return single_open(file, node->show, node->asus); 1671 } 1672 1673 static const struct file_operations asus_wmi_debugfs_io_ops = { 1674 .owner = THIS_MODULE, 1675 .open = asus_wmi_debugfs_open, 1676 .read = seq_read, 1677 .llseek = seq_lseek, 1678 .release = single_release, 1679 }; 1680 1681 static void asus_wmi_debugfs_exit(struct asus_wmi *asus) 1682 { 1683 debugfs_remove_recursive(asus->debug.root); 1684 } 1685 1686 static int asus_wmi_debugfs_init(struct asus_wmi *asus) 1687 { 1688 struct dentry *dent; 1689 int i; 1690 1691 asus->debug.root = debugfs_create_dir(asus->driver->name, NULL); 1692 if (!asus->debug.root) { 1693 pr_err("failed to create debugfs directory\n"); 1694 goto error_debugfs; 1695 } 1696 1697 dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR, 1698 asus->debug.root, &asus->debug.method_id); 1699 if (!dent) 1700 goto error_debugfs; 1701 1702 dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR, 1703 asus->debug.root, &asus->debug.dev_id); 1704 if (!dent) 1705 goto error_debugfs; 1706 1707 dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR, 1708 asus->debug.root, &asus->debug.ctrl_param); 1709 if (!dent) 1710 goto error_debugfs; 1711 1712 for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) { 1713 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i]; 1714 1715 node->asus = asus; 1716 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, 1717 asus->debug.root, node, 1718 &asus_wmi_debugfs_io_ops); 1719 if (!dent) { 1720 pr_err("failed to create debug file: %s\n", node->name); 1721 goto error_debugfs; 1722 } 1723 } 1724 1725 return 0; 1726 1727 error_debugfs: 1728 asus_wmi_debugfs_exit(asus); 1729 return -ENOMEM; 1730 } 1731 1732 /* 1733 * WMI Driver 1734 */ 1735 static int asus_wmi_add(struct platform_device *pdev) 1736 { 1737 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver); 1738 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv); 1739 struct asus_wmi *asus; 1740 acpi_status status; 1741 int err; 1742 u32 result; 1743 1744 asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL); 1745 if (!asus) 1746 return -ENOMEM; 1747 1748 asus->driver = wdrv; 1749 asus->platform_device = pdev; 1750 wdrv->platform_device = pdev; 1751 platform_set_drvdata(asus->platform_device, asus); 1752 1753 if (wdrv->detect_quirks) 1754 wdrv->detect_quirks(asus->driver); 1755 1756 err = asus_wmi_platform_init(asus); 1757 if (err) 1758 goto fail_platform; 1759 1760 err = asus_wmi_input_init(asus); 1761 if (err) 1762 goto fail_input; 1763 1764 err = asus_wmi_hwmon_init(asus); 1765 if (err) 1766 goto fail_hwmon; 1767 1768 err = asus_wmi_led_init(asus); 1769 if (err) 1770 goto fail_leds; 1771 1772 err = asus_wmi_rfkill_init(asus); 1773 if (err) 1774 goto fail_rfkill; 1775 1776 if (asus->driver->quirks->wmi_backlight_power) 1777 acpi_video_dmi_promote_vendor(); 1778 if (!acpi_video_backlight_support()) { 1779 pr_info("Disabling ACPI video driver\n"); 1780 acpi_video_unregister(); 1781 err = asus_wmi_backlight_init(asus); 1782 if (err && err != -ENODEV) 1783 goto fail_backlight; 1784 } else 1785 pr_info("Backlight controlled by ACPI video driver\n"); 1786 1787 status = wmi_install_notify_handler(asus->driver->event_guid, 1788 asus_wmi_notify, asus); 1789 if (ACPI_FAILURE(status)) { 1790 pr_err("Unable to register notify handler - %d\n", status); 1791 err = -ENODEV; 1792 goto fail_wmi_handler; 1793 } 1794 1795 err = asus_wmi_debugfs_init(asus); 1796 if (err) 1797 goto fail_debugfs; 1798 1799 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result); 1800 if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT)) 1801 asus->driver->wlan_ctrl_by_user = 1; 1802 1803 return 0; 1804 1805 fail_debugfs: 1806 wmi_remove_notify_handler(asus->driver->event_guid); 1807 fail_wmi_handler: 1808 asus_wmi_backlight_exit(asus); 1809 fail_backlight: 1810 asus_wmi_rfkill_exit(asus); 1811 fail_rfkill: 1812 asus_wmi_led_exit(asus); 1813 fail_leds: 1814 fail_hwmon: 1815 asus_wmi_input_exit(asus); 1816 fail_input: 1817 asus_wmi_platform_exit(asus); 1818 fail_platform: 1819 kfree(asus); 1820 return err; 1821 } 1822 1823 static int asus_wmi_remove(struct platform_device *device) 1824 { 1825 struct asus_wmi *asus; 1826 1827 asus = platform_get_drvdata(device); 1828 wmi_remove_notify_handler(asus->driver->event_guid); 1829 asus_wmi_backlight_exit(asus); 1830 asus_wmi_input_exit(asus); 1831 asus_wmi_led_exit(asus); 1832 asus_wmi_rfkill_exit(asus); 1833 asus_wmi_debugfs_exit(asus); 1834 asus_wmi_platform_exit(asus); 1835 1836 kfree(asus); 1837 return 0; 1838 } 1839 1840 /* 1841 * Platform driver - hibernate/resume callbacks 1842 */ 1843 static int asus_hotk_thaw(struct device *device) 1844 { 1845 struct asus_wmi *asus = dev_get_drvdata(device); 1846 1847 if (asus->wlan.rfkill) { 1848 bool wlan; 1849 1850 /* 1851 * Work around bios bug - acpi _PTS turns off the wireless led 1852 * during suspend. Normally it restores it on resume, but 1853 * we should kick it ourselves in case hibernation is aborted. 1854 */ 1855 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN); 1856 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL); 1857 } 1858 1859 return 0; 1860 } 1861 1862 static int asus_hotk_restore(struct device *device) 1863 { 1864 struct asus_wmi *asus = dev_get_drvdata(device); 1865 int bl; 1866 1867 /* Refresh both wlan rfkill state and pci hotplug */ 1868 if (asus->wlan.rfkill) 1869 asus_rfkill_hotplug(asus); 1870 1871 if (asus->bluetooth.rfkill) { 1872 bl = !asus_wmi_get_devstate_simple(asus, 1873 ASUS_WMI_DEVID_BLUETOOTH); 1874 rfkill_set_sw_state(asus->bluetooth.rfkill, bl); 1875 } 1876 if (asus->wimax.rfkill) { 1877 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX); 1878 rfkill_set_sw_state(asus->wimax.rfkill, bl); 1879 } 1880 if (asus->wwan3g.rfkill) { 1881 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G); 1882 rfkill_set_sw_state(asus->wwan3g.rfkill, bl); 1883 } 1884 if (asus->gps.rfkill) { 1885 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS); 1886 rfkill_set_sw_state(asus->gps.rfkill, bl); 1887 } 1888 if (asus->uwb.rfkill) { 1889 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB); 1890 rfkill_set_sw_state(asus->uwb.rfkill, bl); 1891 } 1892 1893 return 0; 1894 } 1895 1896 static const struct dev_pm_ops asus_pm_ops = { 1897 .thaw = asus_hotk_thaw, 1898 .restore = asus_hotk_restore, 1899 }; 1900 1901 static int asus_wmi_probe(struct platform_device *pdev) 1902 { 1903 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver); 1904 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv); 1905 int ret; 1906 1907 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) { 1908 pr_warn("Management GUID not found\n"); 1909 return -ENODEV; 1910 } 1911 1912 if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) { 1913 pr_warn("Event GUID not found\n"); 1914 return -ENODEV; 1915 } 1916 1917 if (wdrv->probe) { 1918 ret = wdrv->probe(pdev); 1919 if (ret) 1920 return ret; 1921 } 1922 1923 return asus_wmi_add(pdev); 1924 } 1925 1926 static bool used; 1927 1928 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver) 1929 { 1930 struct platform_driver *platform_driver; 1931 struct platform_device *platform_device; 1932 1933 if (used) 1934 return -EBUSY; 1935 1936 platform_driver = &driver->platform_driver; 1937 platform_driver->remove = asus_wmi_remove; 1938 platform_driver->driver.owner = driver->owner; 1939 platform_driver->driver.name = driver->name; 1940 platform_driver->driver.pm = &asus_pm_ops; 1941 1942 platform_device = platform_create_bundle(platform_driver, 1943 asus_wmi_probe, 1944 NULL, 0, NULL, 0); 1945 if (IS_ERR(platform_device)) 1946 return PTR_ERR(platform_device); 1947 1948 used = true; 1949 return 0; 1950 } 1951 EXPORT_SYMBOL_GPL(asus_wmi_register_driver); 1952 1953 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver) 1954 { 1955 platform_device_unregister(driver->platform_device); 1956 platform_driver_unregister(&driver->platform_driver); 1957 used = false; 1958 } 1959 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver); 1960 1961 static int __init asus_wmi_init(void) 1962 { 1963 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) { 1964 pr_info("Asus Management GUID not found\n"); 1965 return -ENODEV; 1966 } 1967 1968 pr_info("ASUS WMI generic driver loaded\n"); 1969 return 0; 1970 } 1971 1972 static void __exit asus_wmi_exit(void) 1973 { 1974 pr_info("ASUS WMI generic driver unloaded\n"); 1975 } 1976 1977 module_init(asus_wmi_init); 1978 module_exit(asus_wmi_exit); 1979