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 pci_bus_add_device(dev); 646 } 647 } else { 648 dev = pci_get_slot(bus, 0); 649 if (dev) { 650 pci_stop_and_remove_bus_device(dev); 651 pci_dev_put(dev); 652 } 653 } 654 } 655 656 out_unlock: 657 pci_unlock_rescan_remove(); 658 mutex_unlock(&asus->hotplug_lock); 659 } 660 661 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data) 662 { 663 struct asus_wmi *asus = data; 664 665 if (event != ACPI_NOTIFY_BUS_CHECK) 666 return; 667 668 /* 669 * We can't call directly asus_rfkill_hotplug because most 670 * of the time WMBC is still being executed and not reetrant. 671 * There is currently no way to tell ACPICA that we want this 672 * method to be serialized, we schedule a asus_rfkill_hotplug 673 * call later, in a safer context. 674 */ 675 queue_work(asus->hotplug_workqueue, &asus->hotplug_work); 676 } 677 678 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node) 679 { 680 acpi_status status; 681 acpi_handle handle; 682 683 status = acpi_get_handle(NULL, node, &handle); 684 685 if (ACPI_SUCCESS(status)) { 686 status = acpi_install_notify_handler(handle, 687 ACPI_SYSTEM_NOTIFY, 688 asus_rfkill_notify, asus); 689 if (ACPI_FAILURE(status)) 690 pr_warn("Failed to register notify on %s\n", node); 691 } else 692 return -ENODEV; 693 694 return 0; 695 } 696 697 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node) 698 { 699 acpi_status status = AE_OK; 700 acpi_handle handle; 701 702 status = acpi_get_handle(NULL, node, &handle); 703 704 if (ACPI_SUCCESS(status)) { 705 status = acpi_remove_notify_handler(handle, 706 ACPI_SYSTEM_NOTIFY, 707 asus_rfkill_notify); 708 if (ACPI_FAILURE(status)) 709 pr_err("Error removing rfkill notify handler %s\n", 710 node); 711 } 712 } 713 714 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot, 715 u8 *value) 716 { 717 struct asus_wmi *asus = hotplug_slot->private; 718 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN); 719 720 if (result < 0) 721 return result; 722 723 *value = !!result; 724 return 0; 725 } 726 727 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 728 { 729 kfree(hotplug_slot->info); 730 kfree(hotplug_slot); 731 } 732 733 static struct hotplug_slot_ops asus_hotplug_slot_ops = { 734 .owner = THIS_MODULE, 735 .get_adapter_status = asus_get_adapter_status, 736 .get_power_status = asus_get_adapter_status, 737 }; 738 739 static void asus_hotplug_work(struct work_struct *work) 740 { 741 struct asus_wmi *asus; 742 743 asus = container_of(work, struct asus_wmi, hotplug_work); 744 asus_rfkill_hotplug(asus); 745 } 746 747 static int asus_setup_pci_hotplug(struct asus_wmi *asus) 748 { 749 int ret = -ENOMEM; 750 struct pci_bus *bus = pci_find_bus(0, 1); 751 752 if (!bus) { 753 pr_err("Unable to find wifi PCI bus\n"); 754 return -ENODEV; 755 } 756 757 asus->hotplug_workqueue = 758 create_singlethread_workqueue("hotplug_workqueue"); 759 if (!asus->hotplug_workqueue) 760 goto error_workqueue; 761 762 INIT_WORK(&asus->hotplug_work, asus_hotplug_work); 763 764 asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 765 if (!asus->hotplug_slot) 766 goto error_slot; 767 768 asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 769 GFP_KERNEL); 770 if (!asus->hotplug_slot->info) 771 goto error_info; 772 773 asus->hotplug_slot->private = asus; 774 asus->hotplug_slot->release = &asus_cleanup_pci_hotplug; 775 asus->hotplug_slot->ops = &asus_hotplug_slot_ops; 776 asus_get_adapter_status(asus->hotplug_slot, 777 &asus->hotplug_slot->info->adapter_status); 778 779 ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi"); 780 if (ret) { 781 pr_err("Unable to register hotplug slot - %d\n", ret); 782 goto error_register; 783 } 784 785 return 0; 786 787 error_register: 788 kfree(asus->hotplug_slot->info); 789 error_info: 790 kfree(asus->hotplug_slot); 791 asus->hotplug_slot = NULL; 792 error_slot: 793 destroy_workqueue(asus->hotplug_workqueue); 794 error_workqueue: 795 return ret; 796 } 797 798 /* 799 * Rfkill devices 800 */ 801 static int asus_rfkill_set(void *data, bool blocked) 802 { 803 struct asus_rfkill *priv = data; 804 u32 ctrl_param = !blocked; 805 u32 dev_id = priv->dev_id; 806 807 /* 808 * If the user bit is set, BIOS can't set and record the wlan status, 809 * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED 810 * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN). 811 * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED 812 * while setting the wlan status through WMI. 813 * This is also the behavior that windows app will do. 814 */ 815 if ((dev_id == ASUS_WMI_DEVID_WLAN) && 816 priv->asus->driver->wlan_ctrl_by_user) 817 dev_id = ASUS_WMI_DEVID_WLAN_LED; 818 819 return asus_wmi_set_devstate(dev_id, ctrl_param, NULL); 820 } 821 822 static void asus_rfkill_query(struct rfkill *rfkill, void *data) 823 { 824 struct asus_rfkill *priv = data; 825 int result; 826 827 result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id); 828 829 if (result < 0) 830 return; 831 832 rfkill_set_sw_state(priv->rfkill, !result); 833 } 834 835 static int asus_rfkill_wlan_set(void *data, bool blocked) 836 { 837 struct asus_rfkill *priv = data; 838 struct asus_wmi *asus = priv->asus; 839 int ret; 840 841 /* 842 * This handler is enabled only if hotplug is enabled. 843 * In this case, the asus_wmi_set_devstate() will 844 * trigger a wmi notification and we need to wait 845 * this call to finish before being able to call 846 * any wmi method 847 */ 848 mutex_lock(&asus->wmi_lock); 849 ret = asus_rfkill_set(data, blocked); 850 mutex_unlock(&asus->wmi_lock); 851 return ret; 852 } 853 854 static const struct rfkill_ops asus_rfkill_wlan_ops = { 855 .set_block = asus_rfkill_wlan_set, 856 .query = asus_rfkill_query, 857 }; 858 859 static const struct rfkill_ops asus_rfkill_ops = { 860 .set_block = asus_rfkill_set, 861 .query = asus_rfkill_query, 862 }; 863 864 static int asus_new_rfkill(struct asus_wmi *asus, 865 struct asus_rfkill *arfkill, 866 const char *name, enum rfkill_type type, int dev_id) 867 { 868 int result = asus_wmi_get_devstate_simple(asus, dev_id); 869 struct rfkill **rfkill = &arfkill->rfkill; 870 871 if (result < 0) 872 return result; 873 874 arfkill->dev_id = dev_id; 875 arfkill->asus = asus; 876 877 if (dev_id == ASUS_WMI_DEVID_WLAN && 878 asus->driver->quirks->hotplug_wireless) 879 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type, 880 &asus_rfkill_wlan_ops, arfkill); 881 else 882 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type, 883 &asus_rfkill_ops, arfkill); 884 885 if (!*rfkill) 886 return -EINVAL; 887 888 if ((dev_id == ASUS_WMI_DEVID_WLAN) && 889 (asus->driver->quirks->wapf == 4)) 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\n", 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 DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL); 1074 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL); 1075 1076 static struct attribute *hwmon_attributes[] = { 1077 &dev_attr_pwm1.attr, 1078 &dev_attr_temp1_input.attr, 1079 NULL 1080 }; 1081 1082 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj, 1083 struct attribute *attr, int idx) 1084 { 1085 struct device *dev = container_of(kobj, struct device, kobj); 1086 struct platform_device *pdev = to_platform_device(dev->parent); 1087 struct asus_wmi *asus = platform_get_drvdata(pdev); 1088 bool ok = true; 1089 int dev_id = -1; 1090 u32 value = ASUS_WMI_UNSUPPORTED_METHOD; 1091 1092 if (attr == &dev_attr_pwm1.attr) 1093 dev_id = ASUS_WMI_DEVID_FAN_CTRL; 1094 else if (attr == &dev_attr_temp1_input.attr) 1095 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL; 1096 1097 if (dev_id != -1) { 1098 int err = asus_wmi_get_devstate(asus, dev_id, &value); 1099 1100 if (err < 0) 1101 return 0; /* can't return negative here */ 1102 } 1103 1104 if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) { 1105 /* 1106 * We need to find a better way, probably using sfun, 1107 * bits or spec ... 1108 * Currently we disable it if: 1109 * - ASUS_WMI_UNSUPPORTED_METHOD is returned 1110 * - reverved bits are non-zero 1111 * - sfun and presence bit are not set 1112 */ 1113 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000 1114 || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT))) 1115 ok = false; 1116 } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) { 1117 /* If value is zero, something is clearly wrong */ 1118 if (value == 0) 1119 ok = false; 1120 } 1121 1122 return ok ? attr->mode : 0; 1123 } 1124 1125 static struct attribute_group hwmon_attribute_group = { 1126 .is_visible = asus_hwmon_sysfs_is_visible, 1127 .attrs = hwmon_attributes 1128 }; 1129 __ATTRIBUTE_GROUPS(hwmon_attribute); 1130 1131 static int asus_wmi_hwmon_init(struct asus_wmi *asus) 1132 { 1133 struct device *hwmon; 1134 1135 hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev, 1136 "asus", asus, 1137 hwmon_attribute_groups); 1138 if (IS_ERR(hwmon)) { 1139 pr_err("Could not register asus hwmon device\n"); 1140 return PTR_ERR(hwmon); 1141 } 1142 return 0; 1143 } 1144 1145 /* 1146 * Backlight 1147 */ 1148 static int read_backlight_power(struct asus_wmi *asus) 1149 { 1150 int ret; 1151 if (asus->driver->quirks->store_backlight_power) 1152 ret = !asus->driver->panel_power; 1153 else 1154 ret = asus_wmi_get_devstate_simple(asus, 1155 ASUS_WMI_DEVID_BACKLIGHT); 1156 1157 if (ret < 0) 1158 return ret; 1159 1160 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN; 1161 } 1162 1163 static int read_brightness_max(struct asus_wmi *asus) 1164 { 1165 u32 retval; 1166 int err; 1167 1168 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval); 1169 1170 if (err < 0) 1171 return err; 1172 1173 retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK; 1174 retval >>= 8; 1175 1176 if (!retval) 1177 return -ENODEV; 1178 1179 return retval; 1180 } 1181 1182 static int read_brightness(struct backlight_device *bd) 1183 { 1184 struct asus_wmi *asus = bl_get_data(bd); 1185 u32 retval; 1186 int err; 1187 1188 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval); 1189 1190 if (err < 0) 1191 return err; 1192 1193 return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK; 1194 } 1195 1196 static u32 get_scalar_command(struct backlight_device *bd) 1197 { 1198 struct asus_wmi *asus = bl_get_data(bd); 1199 u32 ctrl_param = 0; 1200 1201 if ((asus->driver->brightness < bd->props.brightness) || 1202 bd->props.brightness == bd->props.max_brightness) 1203 ctrl_param = 0x00008001; 1204 else if ((asus->driver->brightness > bd->props.brightness) || 1205 bd->props.brightness == 0) 1206 ctrl_param = 0x00008000; 1207 1208 asus->driver->brightness = bd->props.brightness; 1209 1210 return ctrl_param; 1211 } 1212 1213 static int update_bl_status(struct backlight_device *bd) 1214 { 1215 struct asus_wmi *asus = bl_get_data(bd); 1216 u32 ctrl_param; 1217 int power, err = 0; 1218 1219 power = read_backlight_power(asus); 1220 if (power != -ENODEV && bd->props.power != power) { 1221 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK); 1222 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT, 1223 ctrl_param, NULL); 1224 if (asus->driver->quirks->store_backlight_power) 1225 asus->driver->panel_power = bd->props.power; 1226 1227 /* When using scalar brightness, updating the brightness 1228 * will mess with the backlight power */ 1229 if (asus->driver->quirks->scalar_panel_brightness) 1230 return err; 1231 } 1232 1233 if (asus->driver->quirks->scalar_panel_brightness) 1234 ctrl_param = get_scalar_command(bd); 1235 else 1236 ctrl_param = bd->props.brightness; 1237 1238 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS, 1239 ctrl_param, NULL); 1240 1241 return err; 1242 } 1243 1244 static const struct backlight_ops asus_wmi_bl_ops = { 1245 .get_brightness = read_brightness, 1246 .update_status = update_bl_status, 1247 }; 1248 1249 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code) 1250 { 1251 struct backlight_device *bd = asus->backlight_device; 1252 int old = bd->props.brightness; 1253 int new = old; 1254 1255 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 1256 new = code - NOTIFY_BRNUP_MIN + 1; 1257 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX) 1258 new = code - NOTIFY_BRNDOWN_MIN; 1259 1260 bd->props.brightness = new; 1261 backlight_update_status(bd); 1262 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 1263 1264 return old; 1265 } 1266 1267 static int asus_wmi_backlight_init(struct asus_wmi *asus) 1268 { 1269 struct backlight_device *bd; 1270 struct backlight_properties props; 1271 int max; 1272 int power; 1273 1274 max = read_brightness_max(asus); 1275 1276 if (max == -ENODEV) 1277 max = 0; 1278 else if (max < 0) 1279 return max; 1280 1281 power = read_backlight_power(asus); 1282 1283 if (power == -ENODEV) 1284 power = FB_BLANK_UNBLANK; 1285 else if (power < 0) 1286 return power; 1287 1288 memset(&props, 0, sizeof(struct backlight_properties)); 1289 props.type = BACKLIGHT_PLATFORM; 1290 props.max_brightness = max; 1291 bd = backlight_device_register(asus->driver->name, 1292 &asus->platform_device->dev, asus, 1293 &asus_wmi_bl_ops, &props); 1294 if (IS_ERR(bd)) { 1295 pr_err("Could not register backlight device\n"); 1296 return PTR_ERR(bd); 1297 } 1298 1299 asus->backlight_device = bd; 1300 1301 if (asus->driver->quirks->store_backlight_power) 1302 asus->driver->panel_power = power; 1303 1304 bd->props.brightness = read_brightness(bd); 1305 bd->props.power = power; 1306 backlight_update_status(bd); 1307 1308 asus->driver->brightness = bd->props.brightness; 1309 1310 return 0; 1311 } 1312 1313 static void asus_wmi_backlight_exit(struct asus_wmi *asus) 1314 { 1315 if (asus->backlight_device) 1316 backlight_device_unregister(asus->backlight_device); 1317 1318 asus->backlight_device = NULL; 1319 } 1320 1321 static int is_display_toggle(int code) 1322 { 1323 /* display toggle keys */ 1324 if ((code >= 0x61 && code <= 0x67) || 1325 (code >= 0x8c && code <= 0x93) || 1326 (code >= 0xa0 && code <= 0xa7) || 1327 (code >= 0xd0 && code <= 0xd5)) 1328 return 1; 1329 1330 return 0; 1331 } 1332 1333 static void asus_wmi_notify(u32 value, void *context) 1334 { 1335 struct asus_wmi *asus = context; 1336 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; 1337 union acpi_object *obj; 1338 acpi_status status; 1339 int code; 1340 int orig_code; 1341 unsigned int key_value = 1; 1342 bool autorelease = 1; 1343 1344 status = wmi_get_event_data(value, &response); 1345 if (status != AE_OK) { 1346 pr_err("bad event status 0x%x\n", status); 1347 return; 1348 } 1349 1350 obj = (union acpi_object *)response.pointer; 1351 1352 if (!obj || obj->type != ACPI_TYPE_INTEGER) 1353 goto exit; 1354 1355 code = obj->integer.value; 1356 orig_code = code; 1357 1358 if (asus->driver->key_filter) { 1359 asus->driver->key_filter(asus->driver, &code, &key_value, 1360 &autorelease); 1361 if (code == ASUS_WMI_KEY_IGNORE) 1362 goto exit; 1363 } 1364 1365 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX) 1366 code = ASUS_WMI_BRN_UP; 1367 else if (code >= NOTIFY_BRNDOWN_MIN && 1368 code <= NOTIFY_BRNDOWN_MAX) 1369 code = ASUS_WMI_BRN_DOWN; 1370 1371 if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) { 1372 if (!acpi_video_backlight_support()) { 1373 asus_wmi_backlight_notify(asus, orig_code); 1374 goto exit; 1375 } 1376 } 1377 1378 if (is_display_toggle(code) && 1379 asus->driver->quirks->no_display_toggle) 1380 goto exit; 1381 1382 if (!sparse_keymap_report_event(asus->inputdev, code, 1383 key_value, autorelease)) 1384 pr_info("Unknown key %x pressed\n", code); 1385 1386 exit: 1387 kfree(obj); 1388 } 1389 1390 /* 1391 * Sys helpers 1392 */ 1393 static int parse_arg(const char *buf, unsigned long count, int *val) 1394 { 1395 if (!count) 1396 return 0; 1397 if (sscanf(buf, "%i", val) != 1) 1398 return -EINVAL; 1399 return count; 1400 } 1401 1402 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid, 1403 const char *buf, size_t count) 1404 { 1405 u32 retval; 1406 int rv, err, value; 1407 1408 value = asus_wmi_get_devstate_simple(asus, devid); 1409 if (value == -ENODEV) /* Check device presence */ 1410 return value; 1411 1412 rv = parse_arg(buf, count, &value); 1413 err = asus_wmi_set_devstate(devid, value, &retval); 1414 1415 if (err < 0) 1416 return err; 1417 1418 return rv; 1419 } 1420 1421 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf) 1422 { 1423 int value = asus_wmi_get_devstate_simple(asus, devid); 1424 1425 if (value < 0) 1426 return value; 1427 1428 return sprintf(buf, "%d\n", value); 1429 } 1430 1431 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \ 1432 static ssize_t show_##_name(struct device *dev, \ 1433 struct device_attribute *attr, \ 1434 char *buf) \ 1435 { \ 1436 struct asus_wmi *asus = dev_get_drvdata(dev); \ 1437 \ 1438 return show_sys_wmi(asus, _cm, buf); \ 1439 } \ 1440 static ssize_t store_##_name(struct device *dev, \ 1441 struct device_attribute *attr, \ 1442 const char *buf, size_t count) \ 1443 { \ 1444 struct asus_wmi *asus = dev_get_drvdata(dev); \ 1445 \ 1446 return store_sys_wmi(asus, _cm, buf, count); \ 1447 } \ 1448 static struct device_attribute dev_attr_##_name = { \ 1449 .attr = { \ 1450 .name = __stringify(_name), \ 1451 .mode = _mode }, \ 1452 .show = show_##_name, \ 1453 .store = store_##_name, \ 1454 } 1455 1456 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD); 1457 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA); 1458 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER); 1459 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME); 1460 1461 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr, 1462 const char *buf, size_t count) 1463 { 1464 int value, rv; 1465 1466 if (!count || sscanf(buf, "%i", &value) != 1) 1467 return -EINVAL; 1468 if (value < 0 || value > 2) 1469 return -EINVAL; 1470 1471 rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL); 1472 if (rv < 0) 1473 return rv; 1474 1475 return count; 1476 } 1477 1478 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv); 1479 1480 static struct attribute *platform_attributes[] = { 1481 &dev_attr_cpufv.attr, 1482 &dev_attr_camera.attr, 1483 &dev_attr_cardr.attr, 1484 &dev_attr_touchpad.attr, 1485 &dev_attr_lid_resume.attr, 1486 NULL 1487 }; 1488 1489 static umode_t asus_sysfs_is_visible(struct kobject *kobj, 1490 struct attribute *attr, int idx) 1491 { 1492 struct device *dev = container_of(kobj, struct device, kobj); 1493 struct platform_device *pdev = to_platform_device(dev); 1494 struct asus_wmi *asus = platform_get_drvdata(pdev); 1495 bool ok = true; 1496 int devid = -1; 1497 1498 if (attr == &dev_attr_camera.attr) 1499 devid = ASUS_WMI_DEVID_CAMERA; 1500 else if (attr == &dev_attr_cardr.attr) 1501 devid = ASUS_WMI_DEVID_CARDREADER; 1502 else if (attr == &dev_attr_touchpad.attr) 1503 devid = ASUS_WMI_DEVID_TOUCHPAD; 1504 else if (attr == &dev_attr_lid_resume.attr) 1505 devid = ASUS_WMI_DEVID_LID_RESUME; 1506 1507 if (devid != -1) 1508 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0); 1509 1510 return ok ? attr->mode : 0; 1511 } 1512 1513 static struct attribute_group platform_attribute_group = { 1514 .is_visible = asus_sysfs_is_visible, 1515 .attrs = platform_attributes 1516 }; 1517 1518 static void asus_wmi_sysfs_exit(struct platform_device *device) 1519 { 1520 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group); 1521 } 1522 1523 static int asus_wmi_sysfs_init(struct platform_device *device) 1524 { 1525 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group); 1526 } 1527 1528 /* 1529 * Platform device 1530 */ 1531 static int asus_wmi_platform_init(struct asus_wmi *asus) 1532 { 1533 int rv; 1534 1535 /* INIT enable hotkeys on some models */ 1536 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv)) 1537 pr_info("Initialization: %#x\n", rv); 1538 1539 /* We don't know yet what to do with this version... */ 1540 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) { 1541 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF); 1542 asus->spec = rv; 1543 } 1544 1545 /* 1546 * The SFUN method probably allows the original driver to get the list 1547 * of features supported by a given model. For now, 0x0100 or 0x0800 1548 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card. 1549 * The significance of others is yet to be found. 1550 */ 1551 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) { 1552 pr_info("SFUN value: %#x\n", rv); 1553 asus->sfun = rv; 1554 } 1555 1556 /* 1557 * Eee PC and Notebooks seems to have different method_id for DSTS, 1558 * but it may also be related to the BIOS's SPEC. 1559 * Note, on most Eeepc, there is no way to check if a method exist 1560 * or note, while on notebooks, they returns 0xFFFFFFFE on failure, 1561 * but once again, SPEC may probably be used for that kind of things. 1562 */ 1563 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL)) 1564 asus->dsts_id = ASUS_WMI_METHODID_DSTS; 1565 else 1566 asus->dsts_id = ASUS_WMI_METHODID_DSTS2; 1567 1568 /* CWAP allow to define the behavior of the Fn+F2 key, 1569 * this method doesn't seems to be present on Eee PCs */ 1570 if (asus->driver->quirks->wapf >= 0) 1571 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP, 1572 asus->driver->quirks->wapf, NULL); 1573 1574 return asus_wmi_sysfs_init(asus->platform_device); 1575 } 1576 1577 static void asus_wmi_platform_exit(struct asus_wmi *asus) 1578 { 1579 asus_wmi_sysfs_exit(asus->platform_device); 1580 } 1581 1582 /* 1583 * debugfs 1584 */ 1585 struct asus_wmi_debugfs_node { 1586 struct asus_wmi *asus; 1587 char *name; 1588 int (*show) (struct seq_file *m, void *data); 1589 }; 1590 1591 static int show_dsts(struct seq_file *m, void *data) 1592 { 1593 struct asus_wmi *asus = m->private; 1594 int err; 1595 u32 retval = -1; 1596 1597 err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval); 1598 1599 if (err < 0) 1600 return err; 1601 1602 seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval); 1603 1604 return 0; 1605 } 1606 1607 static int show_devs(struct seq_file *m, void *data) 1608 { 1609 struct asus_wmi *asus = m->private; 1610 int err; 1611 u32 retval = -1; 1612 1613 err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param, 1614 &retval); 1615 1616 if (err < 0) 1617 return err; 1618 1619 seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id, 1620 asus->debug.ctrl_param, retval); 1621 1622 return 0; 1623 } 1624 1625 static int show_call(struct seq_file *m, void *data) 1626 { 1627 struct asus_wmi *asus = m->private; 1628 struct bios_args args = { 1629 .arg0 = asus->debug.dev_id, 1630 .arg1 = asus->debug.ctrl_param, 1631 }; 1632 struct acpi_buffer input = { (acpi_size) sizeof(args), &args }; 1633 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 1634 union acpi_object *obj; 1635 acpi_status status; 1636 1637 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1638 1, asus->debug.method_id, 1639 &input, &output); 1640 1641 if (ACPI_FAILURE(status)) 1642 return -EIO; 1643 1644 obj = (union acpi_object *)output.pointer; 1645 if (obj && obj->type == ACPI_TYPE_INTEGER) 1646 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id, 1647 asus->debug.dev_id, asus->debug.ctrl_param, 1648 (u32) obj->integer.value); 1649 else 1650 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id, 1651 asus->debug.dev_id, asus->debug.ctrl_param, 1652 obj ? obj->type : -1); 1653 1654 kfree(obj); 1655 1656 return 0; 1657 } 1658 1659 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = { 1660 {NULL, "devs", show_devs}, 1661 {NULL, "dsts", show_dsts}, 1662 {NULL, "call", show_call}, 1663 }; 1664 1665 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file) 1666 { 1667 struct asus_wmi_debugfs_node *node = inode->i_private; 1668 1669 return single_open(file, node->show, node->asus); 1670 } 1671 1672 static const struct file_operations asus_wmi_debugfs_io_ops = { 1673 .owner = THIS_MODULE, 1674 .open = asus_wmi_debugfs_open, 1675 .read = seq_read, 1676 .llseek = seq_lseek, 1677 .release = single_release, 1678 }; 1679 1680 static void asus_wmi_debugfs_exit(struct asus_wmi *asus) 1681 { 1682 debugfs_remove_recursive(asus->debug.root); 1683 } 1684 1685 static int asus_wmi_debugfs_init(struct asus_wmi *asus) 1686 { 1687 struct dentry *dent; 1688 int i; 1689 1690 asus->debug.root = debugfs_create_dir(asus->driver->name, NULL); 1691 if (!asus->debug.root) { 1692 pr_err("failed to create debugfs directory\n"); 1693 goto error_debugfs; 1694 } 1695 1696 dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR, 1697 asus->debug.root, &asus->debug.method_id); 1698 if (!dent) 1699 goto error_debugfs; 1700 1701 dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR, 1702 asus->debug.root, &asus->debug.dev_id); 1703 if (!dent) 1704 goto error_debugfs; 1705 1706 dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR, 1707 asus->debug.root, &asus->debug.ctrl_param); 1708 if (!dent) 1709 goto error_debugfs; 1710 1711 for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) { 1712 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i]; 1713 1714 node->asus = asus; 1715 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO, 1716 asus->debug.root, node, 1717 &asus_wmi_debugfs_io_ops); 1718 if (!dent) { 1719 pr_err("failed to create debug file: %s\n", node->name); 1720 goto error_debugfs; 1721 } 1722 } 1723 1724 return 0; 1725 1726 error_debugfs: 1727 asus_wmi_debugfs_exit(asus); 1728 return -ENOMEM; 1729 } 1730 1731 /* 1732 * WMI Driver 1733 */ 1734 static int asus_wmi_add(struct platform_device *pdev) 1735 { 1736 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver); 1737 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv); 1738 struct asus_wmi *asus; 1739 acpi_status status; 1740 int err; 1741 u32 result; 1742 1743 asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL); 1744 if (!asus) 1745 return -ENOMEM; 1746 1747 asus->driver = wdrv; 1748 asus->platform_device = pdev; 1749 wdrv->platform_device = pdev; 1750 platform_set_drvdata(asus->platform_device, asus); 1751 1752 if (wdrv->detect_quirks) 1753 wdrv->detect_quirks(asus->driver); 1754 1755 err = asus_wmi_platform_init(asus); 1756 if (err) 1757 goto fail_platform; 1758 1759 err = asus_wmi_input_init(asus); 1760 if (err) 1761 goto fail_input; 1762 1763 err = asus_wmi_hwmon_init(asus); 1764 if (err) 1765 goto fail_hwmon; 1766 1767 err = asus_wmi_led_init(asus); 1768 if (err) 1769 goto fail_leds; 1770 1771 err = asus_wmi_rfkill_init(asus); 1772 if (err) 1773 goto fail_rfkill; 1774 1775 if (asus->driver->quirks->wmi_backlight_power) 1776 acpi_video_dmi_promote_vendor(); 1777 if (!acpi_video_backlight_support()) { 1778 pr_info("Disabling ACPI video driver\n"); 1779 acpi_video_unregister(); 1780 err = asus_wmi_backlight_init(asus); 1781 if (err && err != -ENODEV) 1782 goto fail_backlight; 1783 } else 1784 pr_info("Backlight controlled by ACPI video driver\n"); 1785 1786 status = wmi_install_notify_handler(asus->driver->event_guid, 1787 asus_wmi_notify, asus); 1788 if (ACPI_FAILURE(status)) { 1789 pr_err("Unable to register notify handler - %d\n", status); 1790 err = -ENODEV; 1791 goto fail_wmi_handler; 1792 } 1793 1794 err = asus_wmi_debugfs_init(asus); 1795 if (err) 1796 goto fail_debugfs; 1797 1798 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result); 1799 if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT)) 1800 asus->driver->wlan_ctrl_by_user = 1; 1801 1802 return 0; 1803 1804 fail_debugfs: 1805 wmi_remove_notify_handler(asus->driver->event_guid); 1806 fail_wmi_handler: 1807 asus_wmi_backlight_exit(asus); 1808 fail_backlight: 1809 asus_wmi_rfkill_exit(asus); 1810 fail_rfkill: 1811 asus_wmi_led_exit(asus); 1812 fail_leds: 1813 fail_hwmon: 1814 asus_wmi_input_exit(asus); 1815 fail_input: 1816 asus_wmi_platform_exit(asus); 1817 fail_platform: 1818 kfree(asus); 1819 return err; 1820 } 1821 1822 static int asus_wmi_remove(struct platform_device *device) 1823 { 1824 struct asus_wmi *asus; 1825 1826 asus = platform_get_drvdata(device); 1827 wmi_remove_notify_handler(asus->driver->event_guid); 1828 asus_wmi_backlight_exit(asus); 1829 asus_wmi_input_exit(asus); 1830 asus_wmi_led_exit(asus); 1831 asus_wmi_rfkill_exit(asus); 1832 asus_wmi_debugfs_exit(asus); 1833 asus_wmi_platform_exit(asus); 1834 1835 kfree(asus); 1836 return 0; 1837 } 1838 1839 /* 1840 * Platform driver - hibernate/resume callbacks 1841 */ 1842 static int asus_hotk_thaw(struct device *device) 1843 { 1844 struct asus_wmi *asus = dev_get_drvdata(device); 1845 1846 if (asus->wlan.rfkill) { 1847 bool wlan; 1848 1849 /* 1850 * Work around bios bug - acpi _PTS turns off the wireless led 1851 * during suspend. Normally it restores it on resume, but 1852 * we should kick it ourselves in case hibernation is aborted. 1853 */ 1854 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN); 1855 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL); 1856 } 1857 1858 return 0; 1859 } 1860 1861 static int asus_hotk_restore(struct device *device) 1862 { 1863 struct asus_wmi *asus = dev_get_drvdata(device); 1864 int bl; 1865 1866 /* Refresh both wlan rfkill state and pci hotplug */ 1867 if (asus->wlan.rfkill) 1868 asus_rfkill_hotplug(asus); 1869 1870 if (asus->bluetooth.rfkill) { 1871 bl = !asus_wmi_get_devstate_simple(asus, 1872 ASUS_WMI_DEVID_BLUETOOTH); 1873 rfkill_set_sw_state(asus->bluetooth.rfkill, bl); 1874 } 1875 if (asus->wimax.rfkill) { 1876 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX); 1877 rfkill_set_sw_state(asus->wimax.rfkill, bl); 1878 } 1879 if (asus->wwan3g.rfkill) { 1880 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G); 1881 rfkill_set_sw_state(asus->wwan3g.rfkill, bl); 1882 } 1883 if (asus->gps.rfkill) { 1884 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS); 1885 rfkill_set_sw_state(asus->gps.rfkill, bl); 1886 } 1887 if (asus->uwb.rfkill) { 1888 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB); 1889 rfkill_set_sw_state(asus->uwb.rfkill, bl); 1890 } 1891 1892 return 0; 1893 } 1894 1895 static const struct dev_pm_ops asus_pm_ops = { 1896 .thaw = asus_hotk_thaw, 1897 .restore = asus_hotk_restore, 1898 }; 1899 1900 static int asus_wmi_probe(struct platform_device *pdev) 1901 { 1902 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver); 1903 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv); 1904 int ret; 1905 1906 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) { 1907 pr_warn("Management GUID not found\n"); 1908 return -ENODEV; 1909 } 1910 1911 if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) { 1912 pr_warn("Event GUID not found\n"); 1913 return -ENODEV; 1914 } 1915 1916 if (wdrv->probe) { 1917 ret = wdrv->probe(pdev); 1918 if (ret) 1919 return ret; 1920 } 1921 1922 return asus_wmi_add(pdev); 1923 } 1924 1925 static bool used; 1926 1927 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver) 1928 { 1929 struct platform_driver *platform_driver; 1930 struct platform_device *platform_device; 1931 1932 if (used) 1933 return -EBUSY; 1934 1935 platform_driver = &driver->platform_driver; 1936 platform_driver->remove = asus_wmi_remove; 1937 platform_driver->driver.owner = driver->owner; 1938 platform_driver->driver.name = driver->name; 1939 platform_driver->driver.pm = &asus_pm_ops; 1940 1941 platform_device = platform_create_bundle(platform_driver, 1942 asus_wmi_probe, 1943 NULL, 0, NULL, 0); 1944 if (IS_ERR(platform_device)) 1945 return PTR_ERR(platform_device); 1946 1947 used = true; 1948 return 0; 1949 } 1950 EXPORT_SYMBOL_GPL(asus_wmi_register_driver); 1951 1952 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver) 1953 { 1954 platform_device_unregister(driver->platform_device); 1955 platform_driver_unregister(&driver->platform_driver); 1956 used = false; 1957 } 1958 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver); 1959 1960 static int __init asus_wmi_init(void) 1961 { 1962 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) { 1963 pr_info("Asus Management GUID not found\n"); 1964 return -ENODEV; 1965 } 1966 1967 pr_info("ASUS WMI generic driver loaded\n"); 1968 return 0; 1969 } 1970 1971 static void __exit asus_wmi_exit(void) 1972 { 1973 pr_info("ASUS WMI generic driver unloaded\n"); 1974 } 1975 1976 module_init(asus_wmi_init); 1977 module_exit(asus_wmi_exit); 1978