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