1 /* 2 * eeepc-laptop.c - Asus Eee PC extras 3 * 4 * Based on asus_acpi.c as patched for the Eee PC by Asus: 5 * ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar 6 * Based on eee.c from eeepc-linux 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 */ 18 19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 20 21 #include <linux/kernel.h> 22 #include <linux/module.h> 23 #include <linux/init.h> 24 #include <linux/types.h> 25 #include <linux/platform_device.h> 26 #include <linux/backlight.h> 27 #include <linux/fb.h> 28 #include <linux/hwmon.h> 29 #include <linux/hwmon-sysfs.h> 30 #include <linux/slab.h> 31 #include <linux/acpi.h> 32 #include <linux/uaccess.h> 33 #include <linux/input.h> 34 #include <linux/input/sparse-keymap.h> 35 #include <linux/rfkill.h> 36 #include <linux/pci.h> 37 #include <linux/pci_hotplug.h> 38 #include <linux/leds.h> 39 #include <linux/dmi.h> 40 #include <acpi/video.h> 41 42 #define EEEPC_LAPTOP_VERSION "0.1" 43 #define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver" 44 #define EEEPC_LAPTOP_FILE "eeepc" 45 46 #define EEEPC_ACPI_CLASS "hotkey" 47 #define EEEPC_ACPI_DEVICE_NAME "Hotkey" 48 #define EEEPC_ACPI_HID "ASUS010" 49 50 MODULE_AUTHOR("Corentin Chary, Eric Cooper"); 51 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME); 52 MODULE_LICENSE("GPL"); 53 54 static bool hotplug_disabled; 55 56 module_param(hotplug_disabled, bool, 0444); 57 MODULE_PARM_DESC(hotplug_disabled, 58 "Disable hotplug for wireless device. " 59 "If your laptop need that, please report to " 60 "acpi4asus-user@lists.sourceforge.net."); 61 62 /* 63 * Definitions for Asus EeePC 64 */ 65 #define NOTIFY_BRN_MIN 0x20 66 #define NOTIFY_BRN_MAX 0x2f 67 68 enum { 69 DISABLE_ASL_WLAN = 0x0001, 70 DISABLE_ASL_BLUETOOTH = 0x0002, 71 DISABLE_ASL_IRDA = 0x0004, 72 DISABLE_ASL_CAMERA = 0x0008, 73 DISABLE_ASL_TV = 0x0010, 74 DISABLE_ASL_GPS = 0x0020, 75 DISABLE_ASL_DISPLAYSWITCH = 0x0040, 76 DISABLE_ASL_MODEM = 0x0080, 77 DISABLE_ASL_CARDREADER = 0x0100, 78 DISABLE_ASL_3G = 0x0200, 79 DISABLE_ASL_WIMAX = 0x0400, 80 DISABLE_ASL_HWCF = 0x0800 81 }; 82 83 enum { 84 CM_ASL_WLAN = 0, 85 CM_ASL_BLUETOOTH, 86 CM_ASL_IRDA, 87 CM_ASL_1394, 88 CM_ASL_CAMERA, 89 CM_ASL_TV, 90 CM_ASL_GPS, 91 CM_ASL_DVDROM, 92 CM_ASL_DISPLAYSWITCH, 93 CM_ASL_PANELBRIGHT, 94 CM_ASL_BIOSFLASH, 95 CM_ASL_ACPIFLASH, 96 CM_ASL_CPUFV, 97 CM_ASL_CPUTEMPERATURE, 98 CM_ASL_FANCPU, 99 CM_ASL_FANCHASSIS, 100 CM_ASL_USBPORT1, 101 CM_ASL_USBPORT2, 102 CM_ASL_USBPORT3, 103 CM_ASL_MODEM, 104 CM_ASL_CARDREADER, 105 CM_ASL_3G, 106 CM_ASL_WIMAX, 107 CM_ASL_HWCF, 108 CM_ASL_LID, 109 CM_ASL_TYPE, 110 CM_ASL_PANELPOWER, /*P901*/ 111 CM_ASL_TPD 112 }; 113 114 static const char *cm_getv[] = { 115 "WLDG", "BTHG", NULL, NULL, 116 "CAMG", NULL, NULL, NULL, 117 NULL, "PBLG", NULL, NULL, 118 "CFVG", NULL, NULL, NULL, 119 "USBG", NULL, NULL, "MODG", 120 "CRDG", "M3GG", "WIMG", "HWCF", 121 "LIDG", "TYPE", "PBPG", "TPDG" 122 }; 123 124 static const char *cm_setv[] = { 125 "WLDS", "BTHS", NULL, NULL, 126 "CAMS", NULL, NULL, NULL, 127 "SDSP", "PBLS", "HDPS", NULL, 128 "CFVS", NULL, NULL, NULL, 129 "USBG", NULL, NULL, "MODS", 130 "CRDS", "M3GS", "WIMS", NULL, 131 NULL, NULL, "PBPS", "TPDS" 132 }; 133 134 static const struct key_entry eeepc_keymap[] = { 135 { KE_KEY, 0x10, { KEY_WLAN } }, 136 { KE_KEY, 0x11, { KEY_WLAN } }, 137 { KE_KEY, 0x12, { KEY_PROG1 } }, 138 { KE_KEY, 0x13, { KEY_MUTE } }, 139 { KE_KEY, 0x14, { KEY_VOLUMEDOWN } }, 140 { KE_KEY, 0x15, { KEY_VOLUMEUP } }, 141 { KE_KEY, 0x16, { KEY_DISPLAY_OFF } }, 142 { KE_KEY, 0x1a, { KEY_COFFEE } }, 143 { KE_KEY, 0x1b, { KEY_ZOOM } }, 144 { KE_KEY, 0x1c, { KEY_PROG2 } }, 145 { KE_KEY, 0x1d, { KEY_PROG3 } }, 146 { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } }, 147 { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } }, 148 { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } }, 149 { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } }, 150 { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } }, 151 { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */ 152 { KE_KEY, 0x38, { KEY_F14 } }, 153 { KE_IGNORE, 0x50, { KEY_RESERVED } }, /* AC plugged */ 154 { KE_IGNORE, 0x51, { KEY_RESERVED } }, /* AC unplugged */ 155 { KE_END, 0 }, 156 }; 157 158 /* 159 * This is the main structure, we can use it to store useful information 160 */ 161 struct eeepc_laptop { 162 acpi_handle handle; /* the handle of the acpi device */ 163 u32 cm_supported; /* the control methods supported 164 by this BIOS */ 165 bool cpufv_disabled; 166 bool hotplug_disabled; 167 u16 event_count[128]; /* count for each event */ 168 169 struct platform_device *platform_device; 170 struct acpi_device *device; /* the device we are in */ 171 struct backlight_device *backlight_device; 172 173 struct input_dev *inputdev; 174 175 struct rfkill *wlan_rfkill; 176 struct rfkill *bluetooth_rfkill; 177 struct rfkill *wwan3g_rfkill; 178 struct rfkill *wimax_rfkill; 179 180 struct hotplug_slot hotplug_slot; 181 struct mutex hotplug_lock; 182 183 struct led_classdev tpd_led; 184 int tpd_led_wk; 185 struct workqueue_struct *led_workqueue; 186 struct work_struct tpd_led_work; 187 }; 188 189 /* 190 * ACPI Helpers 191 */ 192 static int write_acpi_int(acpi_handle handle, const char *method, int val) 193 { 194 acpi_status status; 195 196 status = acpi_execute_simple_method(handle, (char *)method, val); 197 198 return (status == AE_OK ? 0 : -1); 199 } 200 201 static int read_acpi_int(acpi_handle handle, const char *method, int *val) 202 { 203 acpi_status status; 204 unsigned long long result; 205 206 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result); 207 if (ACPI_FAILURE(status)) { 208 *val = -1; 209 return -1; 210 } else { 211 *val = result; 212 return 0; 213 } 214 } 215 216 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value) 217 { 218 const char *method = cm_setv[cm]; 219 220 if (method == NULL) 221 return -ENODEV; 222 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 223 return -ENODEV; 224 225 if (write_acpi_int(eeepc->handle, method, value)) 226 pr_warn("Error writing %s\n", method); 227 return 0; 228 } 229 230 static int get_acpi(struct eeepc_laptop *eeepc, int cm) 231 { 232 const char *method = cm_getv[cm]; 233 int value; 234 235 if (method == NULL) 236 return -ENODEV; 237 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 238 return -ENODEV; 239 240 if (read_acpi_int(eeepc->handle, method, &value)) 241 pr_warn("Error reading %s\n", method); 242 return value; 243 } 244 245 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm, 246 acpi_handle *handle) 247 { 248 const char *method = cm_setv[cm]; 249 acpi_status status; 250 251 if (method == NULL) 252 return -ENODEV; 253 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 254 return -ENODEV; 255 256 status = acpi_get_handle(eeepc->handle, (char *)method, 257 handle); 258 if (status != AE_OK) { 259 pr_warn("Error finding %s\n", method); 260 return -ENODEV; 261 } 262 return 0; 263 } 264 265 266 /* 267 * Sys helpers 268 */ 269 static int parse_arg(const char *buf, int *val) 270 { 271 if (sscanf(buf, "%i", val) != 1) 272 return -EINVAL; 273 return 0; 274 } 275 276 static ssize_t store_sys_acpi(struct device *dev, int cm, 277 const char *buf, size_t count) 278 { 279 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 280 int rv, value; 281 282 rv = parse_arg(buf, &value); 283 if (rv < 0) 284 return rv; 285 rv = set_acpi(eeepc, cm, value); 286 if (rv < 0) 287 return -EIO; 288 return count; 289 } 290 291 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf) 292 { 293 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 294 int value = get_acpi(eeepc, cm); 295 296 if (value < 0) 297 return -EIO; 298 return sprintf(buf, "%d\n", value); 299 } 300 301 #define EEEPC_ACPI_SHOW_FUNC(_name, _cm) \ 302 static ssize_t _name##_show(struct device *dev, \ 303 struct device_attribute *attr, \ 304 char *buf) \ 305 { \ 306 return show_sys_acpi(dev, _cm, buf); \ 307 } 308 309 #define EEEPC_ACPI_STORE_FUNC(_name, _cm) \ 310 static ssize_t _name##_store(struct device *dev, \ 311 struct device_attribute *attr, \ 312 const char *buf, size_t count) \ 313 { \ 314 return store_sys_acpi(dev, _cm, buf, count); \ 315 } 316 317 #define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm) \ 318 EEEPC_ACPI_SHOW_FUNC(_name, _cm) \ 319 EEEPC_ACPI_STORE_FUNC(_name, _cm) \ 320 static DEVICE_ATTR_RW(_name) 321 322 #define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm) \ 323 EEEPC_ACPI_STORE_FUNC(_name, _cm) \ 324 static DEVICE_ATTR_WO(_name) 325 326 EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA); 327 EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER); 328 EEEPC_CREATE_DEVICE_ATTR_WO(disp, CM_ASL_DISPLAYSWITCH); 329 330 struct eeepc_cpufv { 331 int num; 332 int cur; 333 }; 334 335 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c) 336 { 337 c->cur = get_acpi(eeepc, CM_ASL_CPUFV); 338 if (c->cur < 0) 339 return -ENODEV; 340 341 c->num = (c->cur >> 8) & 0xff; 342 c->cur &= 0xff; 343 if (c->num == 0 || c->num > 12) 344 return -ENODEV; 345 return 0; 346 } 347 348 static ssize_t available_cpufv_show(struct device *dev, 349 struct device_attribute *attr, 350 char *buf) 351 { 352 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 353 struct eeepc_cpufv c; 354 int i; 355 ssize_t len = 0; 356 357 if (get_cpufv(eeepc, &c)) 358 return -ENODEV; 359 for (i = 0; i < c.num; i++) 360 len += sprintf(buf + len, "%d ", i); 361 len += sprintf(buf + len, "\n"); 362 return len; 363 } 364 365 static ssize_t cpufv_show(struct device *dev, 366 struct device_attribute *attr, 367 char *buf) 368 { 369 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 370 struct eeepc_cpufv c; 371 372 if (get_cpufv(eeepc, &c)) 373 return -ENODEV; 374 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur); 375 } 376 377 static ssize_t cpufv_store(struct device *dev, 378 struct device_attribute *attr, 379 const char *buf, size_t count) 380 { 381 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 382 struct eeepc_cpufv c; 383 int rv, value; 384 385 if (eeepc->cpufv_disabled) 386 return -EPERM; 387 if (get_cpufv(eeepc, &c)) 388 return -ENODEV; 389 rv = parse_arg(buf, &value); 390 if (rv < 0) 391 return rv; 392 if (value < 0 || value >= c.num) 393 return -EINVAL; 394 rv = set_acpi(eeepc, CM_ASL_CPUFV, value); 395 if (rv) 396 return rv; 397 return count; 398 } 399 400 static ssize_t cpufv_disabled_show(struct device *dev, 401 struct device_attribute *attr, 402 char *buf) 403 { 404 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 405 406 return sprintf(buf, "%d\n", eeepc->cpufv_disabled); 407 } 408 409 static ssize_t cpufv_disabled_store(struct device *dev, 410 struct device_attribute *attr, 411 const char *buf, size_t count) 412 { 413 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 414 int rv, value; 415 416 rv = parse_arg(buf, &value); 417 if (rv < 0) 418 return rv; 419 420 switch (value) { 421 case 0: 422 if (eeepc->cpufv_disabled) 423 pr_warn("cpufv enabled (not officially supported on this model)\n"); 424 eeepc->cpufv_disabled = false; 425 return count; 426 case 1: 427 return -EPERM; 428 default: 429 return -EINVAL; 430 } 431 } 432 433 434 static DEVICE_ATTR_RW(cpufv); 435 static DEVICE_ATTR_RO(available_cpufv); 436 static DEVICE_ATTR_RW(cpufv_disabled); 437 438 static struct attribute *platform_attributes[] = { 439 &dev_attr_camera.attr, 440 &dev_attr_cardr.attr, 441 &dev_attr_disp.attr, 442 &dev_attr_cpufv.attr, 443 &dev_attr_available_cpufv.attr, 444 &dev_attr_cpufv_disabled.attr, 445 NULL 446 }; 447 448 static const struct attribute_group platform_attribute_group = { 449 .attrs = platform_attributes 450 }; 451 452 static int eeepc_platform_init(struct eeepc_laptop *eeepc) 453 { 454 int result; 455 456 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1); 457 if (!eeepc->platform_device) 458 return -ENOMEM; 459 platform_set_drvdata(eeepc->platform_device, eeepc); 460 461 result = platform_device_add(eeepc->platform_device); 462 if (result) 463 goto fail_platform_device; 464 465 result = sysfs_create_group(&eeepc->platform_device->dev.kobj, 466 &platform_attribute_group); 467 if (result) 468 goto fail_sysfs; 469 return 0; 470 471 fail_sysfs: 472 platform_device_del(eeepc->platform_device); 473 fail_platform_device: 474 platform_device_put(eeepc->platform_device); 475 return result; 476 } 477 478 static void eeepc_platform_exit(struct eeepc_laptop *eeepc) 479 { 480 sysfs_remove_group(&eeepc->platform_device->dev.kobj, 481 &platform_attribute_group); 482 platform_device_unregister(eeepc->platform_device); 483 } 484 485 /* 486 * LEDs 487 */ 488 /* 489 * These functions actually update the LED's, and are called from a 490 * workqueue. By doing this as separate work rather than when the LED 491 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 492 * potentially bad time, such as a timer interrupt. 493 */ 494 static void tpd_led_update(struct work_struct *work) 495 { 496 struct eeepc_laptop *eeepc; 497 498 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work); 499 500 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk); 501 } 502 503 static void tpd_led_set(struct led_classdev *led_cdev, 504 enum led_brightness value) 505 { 506 struct eeepc_laptop *eeepc; 507 508 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 509 510 eeepc->tpd_led_wk = (value > 0) ? 1 : 0; 511 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 512 } 513 514 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 515 { 516 struct eeepc_laptop *eeepc; 517 518 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 519 520 return get_acpi(eeepc, CM_ASL_TPD); 521 } 522 523 static int eeepc_led_init(struct eeepc_laptop *eeepc) 524 { 525 int rv; 526 527 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV) 528 return 0; 529 530 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 531 if (!eeepc->led_workqueue) 532 return -ENOMEM; 533 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 534 535 eeepc->tpd_led.name = "eeepc::touchpad"; 536 eeepc->tpd_led.brightness_set = tpd_led_set; 537 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */ 538 eeepc->tpd_led.brightness_get = tpd_led_get; 539 eeepc->tpd_led.max_brightness = 1; 540 541 rv = led_classdev_register(&eeepc->platform_device->dev, 542 &eeepc->tpd_led); 543 if (rv) { 544 destroy_workqueue(eeepc->led_workqueue); 545 return rv; 546 } 547 548 return 0; 549 } 550 551 static void eeepc_led_exit(struct eeepc_laptop *eeepc) 552 { 553 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev)) 554 led_classdev_unregister(&eeepc->tpd_led); 555 if (eeepc->led_workqueue) 556 destroy_workqueue(eeepc->led_workqueue); 557 } 558 559 560 /* 561 * PCI hotplug (for wlan rfkill) 562 */ 563 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc) 564 { 565 if (get_acpi(eeepc, CM_ASL_WLAN) == 1) 566 return false; 567 return true; 568 } 569 570 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle) 571 { 572 struct pci_dev *port; 573 struct pci_dev *dev; 574 struct pci_bus *bus; 575 bool blocked = eeepc_wlan_rfkill_blocked(eeepc); 576 bool absent; 577 u32 l; 578 579 if (eeepc->wlan_rfkill) 580 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 581 582 mutex_lock(&eeepc->hotplug_lock); 583 pci_lock_rescan_remove(); 584 585 if (!eeepc->hotplug_slot.ops) 586 goto out_unlock; 587 588 port = acpi_get_pci_dev(handle); 589 if (!port) { 590 pr_warning("Unable to find port\n"); 591 goto out_unlock; 592 } 593 594 bus = port->subordinate; 595 596 if (!bus) { 597 pr_warn("Unable to find PCI bus 1?\n"); 598 goto out_put_dev; 599 } 600 601 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 602 pr_err("Unable to read PCI config space?\n"); 603 goto out_put_dev; 604 } 605 606 absent = (l == 0xffffffff); 607 608 if (blocked != absent) { 609 pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n", 610 blocked ? "blocked" : "unblocked", 611 absent ? "absent" : "present"); 612 pr_warn("skipped wireless hotplug as probably inappropriate for this model\n"); 613 goto out_put_dev; 614 } 615 616 if (!blocked) { 617 dev = pci_get_slot(bus, 0); 618 if (dev) { 619 /* Device already present */ 620 pci_dev_put(dev); 621 goto out_put_dev; 622 } 623 dev = pci_scan_single_device(bus, 0); 624 if (dev) { 625 pci_bus_assign_resources(bus); 626 pci_bus_add_device(dev); 627 } 628 } else { 629 dev = pci_get_slot(bus, 0); 630 if (dev) { 631 pci_stop_and_remove_bus_device(dev); 632 pci_dev_put(dev); 633 } 634 } 635 out_put_dev: 636 pci_dev_put(port); 637 638 out_unlock: 639 pci_unlock_rescan_remove(); 640 mutex_unlock(&eeepc->hotplug_lock); 641 } 642 643 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node) 644 { 645 acpi_status status = AE_OK; 646 acpi_handle handle; 647 648 status = acpi_get_handle(NULL, node, &handle); 649 650 if (ACPI_SUCCESS(status)) 651 eeepc_rfkill_hotplug(eeepc, handle); 652 } 653 654 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 655 { 656 struct eeepc_laptop *eeepc = data; 657 658 if (event != ACPI_NOTIFY_BUS_CHECK) 659 return; 660 661 eeepc_rfkill_hotplug(eeepc, handle); 662 } 663 664 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc, 665 char *node) 666 { 667 acpi_status status; 668 acpi_handle handle; 669 670 status = acpi_get_handle(NULL, node, &handle); 671 672 if (ACPI_FAILURE(status)) 673 return -ENODEV; 674 675 status = acpi_install_notify_handler(handle, 676 ACPI_SYSTEM_NOTIFY, 677 eeepc_rfkill_notify, 678 eeepc); 679 if (ACPI_FAILURE(status)) 680 pr_warn("Failed to register notify on %s\n", node); 681 682 /* 683 * Refresh pci hotplug in case the rfkill state was 684 * changed during setup. 685 */ 686 eeepc_rfkill_hotplug(eeepc, handle); 687 return 0; 688 } 689 690 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc, 691 char *node) 692 { 693 acpi_status status = AE_OK; 694 acpi_handle handle; 695 696 status = acpi_get_handle(NULL, node, &handle); 697 698 if (ACPI_FAILURE(status)) 699 return; 700 701 status = acpi_remove_notify_handler(handle, 702 ACPI_SYSTEM_NOTIFY, 703 eeepc_rfkill_notify); 704 if (ACPI_FAILURE(status)) 705 pr_err("Error removing rfkill notify handler %s\n", 706 node); 707 /* 708 * Refresh pci hotplug in case the rfkill 709 * state was changed after 710 * eeepc_unregister_rfkill_notifier() 711 */ 712 eeepc_rfkill_hotplug(eeepc, handle); 713 } 714 715 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 716 u8 *value) 717 { 718 struct eeepc_laptop *eeepc; 719 int val; 720 721 eeepc = container_of(hotplug_slot, struct eeepc_laptop, hotplug_slot); 722 val = get_acpi(eeepc, CM_ASL_WLAN); 723 724 if (val == 1 || val == 0) 725 *value = val; 726 else 727 return -EINVAL; 728 729 return 0; 730 } 731 732 static const struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 733 .get_adapter_status = eeepc_get_adapter_status, 734 .get_power_status = eeepc_get_adapter_status, 735 }; 736 737 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc) 738 { 739 int ret = -ENOMEM; 740 struct pci_bus *bus = pci_find_bus(0, 1); 741 742 if (!bus) { 743 pr_err("Unable to find wifi PCI bus\n"); 744 return -ENODEV; 745 } 746 747 eeepc->hotplug_slot.ops = &eeepc_hotplug_slot_ops; 748 749 ret = pci_hp_register(&eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 750 if (ret) { 751 pr_err("Unable to register hotplug slot - %d\n", ret); 752 goto error_register; 753 } 754 755 return 0; 756 757 error_register: 758 eeepc->hotplug_slot.ops = NULL; 759 return ret; 760 } 761 762 /* 763 * Rfkill devices 764 */ 765 static int eeepc_rfkill_set(void *data, bool blocked) 766 { 767 acpi_handle handle = data; 768 769 return write_acpi_int(handle, NULL, !blocked); 770 } 771 772 static const struct rfkill_ops eeepc_rfkill_ops = { 773 .set_block = eeepc_rfkill_set, 774 }; 775 776 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc, 777 struct rfkill **rfkill, 778 const char *name, 779 enum rfkill_type type, int cm) 780 { 781 acpi_handle handle; 782 int result; 783 784 result = acpi_setter_handle(eeepc, cm, &handle); 785 if (result < 0) 786 return result; 787 788 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 789 &eeepc_rfkill_ops, handle); 790 791 if (!*rfkill) 792 return -EINVAL; 793 794 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1); 795 result = rfkill_register(*rfkill); 796 if (result) { 797 rfkill_destroy(*rfkill); 798 *rfkill = NULL; 799 return result; 800 } 801 return 0; 802 } 803 804 static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5"; 805 static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6"; 806 static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7"; 807 808 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc) 809 { 810 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1); 811 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2); 812 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3); 813 if (eeepc->wlan_rfkill) { 814 rfkill_unregister(eeepc->wlan_rfkill); 815 rfkill_destroy(eeepc->wlan_rfkill); 816 eeepc->wlan_rfkill = NULL; 817 } 818 819 if (eeepc->hotplug_slot.ops) 820 pci_hp_deregister(&eeepc->hotplug_slot); 821 822 if (eeepc->bluetooth_rfkill) { 823 rfkill_unregister(eeepc->bluetooth_rfkill); 824 rfkill_destroy(eeepc->bluetooth_rfkill); 825 eeepc->bluetooth_rfkill = NULL; 826 } 827 if (eeepc->wwan3g_rfkill) { 828 rfkill_unregister(eeepc->wwan3g_rfkill); 829 rfkill_destroy(eeepc->wwan3g_rfkill); 830 eeepc->wwan3g_rfkill = NULL; 831 } 832 if (eeepc->wimax_rfkill) { 833 rfkill_unregister(eeepc->wimax_rfkill); 834 rfkill_destroy(eeepc->wimax_rfkill); 835 eeepc->wimax_rfkill = NULL; 836 } 837 } 838 839 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc) 840 { 841 int result = 0; 842 843 mutex_init(&eeepc->hotplug_lock); 844 845 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 846 "eeepc-wlan", RFKILL_TYPE_WLAN, 847 CM_ASL_WLAN); 848 849 if (result && result != -ENODEV) 850 goto exit; 851 852 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 853 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 854 CM_ASL_BLUETOOTH); 855 856 if (result && result != -ENODEV) 857 goto exit; 858 859 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 860 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 861 CM_ASL_3G); 862 863 if (result && result != -ENODEV) 864 goto exit; 865 866 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, 867 "eeepc-wimax", RFKILL_TYPE_WIMAX, 868 CM_ASL_WIMAX); 869 870 if (result && result != -ENODEV) 871 goto exit; 872 873 if (eeepc->hotplug_disabled) 874 return 0; 875 876 result = eeepc_setup_pci_hotplug(eeepc); 877 /* 878 * If we get -EBUSY then something else is handling the PCI hotplug - 879 * don't fail in this case 880 */ 881 if (result == -EBUSY) 882 result = 0; 883 884 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1); 885 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2); 886 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3); 887 888 exit: 889 if (result && result != -ENODEV) 890 eeepc_rfkill_exit(eeepc); 891 return result; 892 } 893 894 /* 895 * Platform driver - hibernate/resume callbacks 896 */ 897 static int eeepc_hotk_thaw(struct device *device) 898 { 899 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 900 901 if (eeepc->wlan_rfkill) { 902 int wlan; 903 904 /* 905 * Work around bios bug - acpi _PTS turns off the wireless led 906 * during suspend. Normally it restores it on resume, but 907 * we should kick it ourselves in case hibernation is aborted. 908 */ 909 wlan = get_acpi(eeepc, CM_ASL_WLAN); 910 if (wlan >= 0) 911 set_acpi(eeepc, CM_ASL_WLAN, wlan); 912 } 913 914 return 0; 915 } 916 917 static int eeepc_hotk_restore(struct device *device) 918 { 919 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 920 921 /* Refresh both wlan rfkill state and pci hotplug */ 922 if (eeepc->wlan_rfkill) { 923 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1); 924 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2); 925 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3); 926 } 927 928 if (eeepc->bluetooth_rfkill) 929 rfkill_set_sw_state(eeepc->bluetooth_rfkill, 930 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1); 931 if (eeepc->wwan3g_rfkill) 932 rfkill_set_sw_state(eeepc->wwan3g_rfkill, 933 get_acpi(eeepc, CM_ASL_3G) != 1); 934 if (eeepc->wimax_rfkill) 935 rfkill_set_sw_state(eeepc->wimax_rfkill, 936 get_acpi(eeepc, CM_ASL_WIMAX) != 1); 937 938 return 0; 939 } 940 941 static const struct dev_pm_ops eeepc_pm_ops = { 942 .thaw = eeepc_hotk_thaw, 943 .restore = eeepc_hotk_restore, 944 }; 945 946 static struct platform_driver platform_driver = { 947 .driver = { 948 .name = EEEPC_LAPTOP_FILE, 949 .pm = &eeepc_pm_ops, 950 } 951 }; 952 953 /* 954 * Hwmon device 955 */ 956 957 #define EEEPC_EC_SC00 0x61 958 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */ 959 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */ 960 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */ 961 962 #define EEEPC_EC_SFB0 0xD0 963 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */ 964 965 static inline int eeepc_pwm_to_lmsensors(int value) 966 { 967 return value * 255 / 100; 968 } 969 970 static inline int eeepc_lmsensors_to_pwm(int value) 971 { 972 value = clamp_val(value, 0, 255); 973 return value * 100 / 255; 974 } 975 976 static int eeepc_get_fan_pwm(void) 977 { 978 u8 value = 0; 979 980 ec_read(EEEPC_EC_FAN_PWM, &value); 981 return eeepc_pwm_to_lmsensors(value); 982 } 983 984 static void eeepc_set_fan_pwm(int value) 985 { 986 value = eeepc_lmsensors_to_pwm(value); 987 ec_write(EEEPC_EC_FAN_PWM, value); 988 } 989 990 static int eeepc_get_fan_rpm(void) 991 { 992 u8 high = 0; 993 u8 low = 0; 994 995 ec_read(EEEPC_EC_FAN_HRPM, &high); 996 ec_read(EEEPC_EC_FAN_LRPM, &low); 997 return high << 8 | low; 998 } 999 1000 #define EEEPC_EC_FAN_CTRL_BIT 0x02 1001 #define EEEPC_FAN_CTRL_MANUAL 1 1002 #define EEEPC_FAN_CTRL_AUTO 2 1003 1004 static int eeepc_get_fan_ctrl(void) 1005 { 1006 u8 value = 0; 1007 1008 ec_read(EEEPC_EC_FAN_CTRL, &value); 1009 if (value & EEEPC_EC_FAN_CTRL_BIT) 1010 return EEEPC_FAN_CTRL_MANUAL; 1011 else 1012 return EEEPC_FAN_CTRL_AUTO; 1013 } 1014 1015 static void eeepc_set_fan_ctrl(int manual) 1016 { 1017 u8 value = 0; 1018 1019 ec_read(EEEPC_EC_FAN_CTRL, &value); 1020 if (manual == EEEPC_FAN_CTRL_MANUAL) 1021 value |= EEEPC_EC_FAN_CTRL_BIT; 1022 else 1023 value &= ~EEEPC_EC_FAN_CTRL_BIT; 1024 ec_write(EEEPC_EC_FAN_CTRL, value); 1025 } 1026 1027 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count) 1028 { 1029 int rv, value; 1030 1031 rv = parse_arg(buf, &value); 1032 if (rv < 0) 1033 return rv; 1034 set(value); 1035 return count; 1036 } 1037 1038 static ssize_t show_sys_hwmon(int (*get)(void), char *buf) 1039 { 1040 return sprintf(buf, "%d\n", get()); 1041 } 1042 1043 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \ 1044 static ssize_t _name##_show(struct device *dev, \ 1045 struct device_attribute *attr, \ 1046 char *buf) \ 1047 { \ 1048 return show_sys_hwmon(_get, buf); \ 1049 } 1050 1051 #define EEEPC_SENSOR_STORE_FUNC(_name, _set) \ 1052 static ssize_t _name##_store(struct device *dev, \ 1053 struct device_attribute *attr, \ 1054 const char *buf, size_t count) \ 1055 { \ 1056 return store_sys_hwmon(_set, buf, count); \ 1057 } 1058 1059 #define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \ 1060 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \ 1061 EEEPC_SENSOR_STORE_FUNC(_name, _set) \ 1062 static DEVICE_ATTR_RW(_name) 1063 1064 #define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \ 1065 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \ 1066 static DEVICE_ATTR_RO(_name) 1067 1068 EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm); 1069 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm, 1070 eeepc_set_fan_pwm); 1071 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl, 1072 eeepc_set_fan_ctrl); 1073 1074 static struct attribute *hwmon_attrs[] = { 1075 &dev_attr_pwm1.attr, 1076 &dev_attr_fan1_input.attr, 1077 &dev_attr_pwm1_enable.attr, 1078 NULL 1079 }; 1080 ATTRIBUTE_GROUPS(hwmon); 1081 1082 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc) 1083 { 1084 struct device *dev = &eeepc->platform_device->dev; 1085 struct device *hwmon; 1086 1087 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL, 1088 hwmon_groups); 1089 if (IS_ERR(hwmon)) { 1090 pr_err("Could not register eeepc hwmon device\n"); 1091 return PTR_ERR(hwmon); 1092 } 1093 return 0; 1094 } 1095 1096 /* 1097 * Backlight device 1098 */ 1099 static int read_brightness(struct backlight_device *bd) 1100 { 1101 struct eeepc_laptop *eeepc = bl_get_data(bd); 1102 1103 return get_acpi(eeepc, CM_ASL_PANELBRIGHT); 1104 } 1105 1106 static int set_brightness(struct backlight_device *bd, int value) 1107 { 1108 struct eeepc_laptop *eeepc = bl_get_data(bd); 1109 1110 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value); 1111 } 1112 1113 static int update_bl_status(struct backlight_device *bd) 1114 { 1115 return set_brightness(bd, bd->props.brightness); 1116 } 1117 1118 static const struct backlight_ops eeepcbl_ops = { 1119 .get_brightness = read_brightness, 1120 .update_status = update_bl_status, 1121 }; 1122 1123 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc) 1124 { 1125 struct backlight_device *bd = eeepc->backlight_device; 1126 int old = bd->props.brightness; 1127 1128 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 1129 1130 return old; 1131 } 1132 1133 static int eeepc_backlight_init(struct eeepc_laptop *eeepc) 1134 { 1135 struct backlight_properties props; 1136 struct backlight_device *bd; 1137 1138 memset(&props, 0, sizeof(struct backlight_properties)); 1139 props.type = BACKLIGHT_PLATFORM; 1140 props.max_brightness = 15; 1141 bd = backlight_device_register(EEEPC_LAPTOP_FILE, 1142 &eeepc->platform_device->dev, eeepc, 1143 &eeepcbl_ops, &props); 1144 if (IS_ERR(bd)) { 1145 pr_err("Could not register eeepc backlight device\n"); 1146 eeepc->backlight_device = NULL; 1147 return PTR_ERR(bd); 1148 } 1149 eeepc->backlight_device = bd; 1150 bd->props.brightness = read_brightness(bd); 1151 bd->props.power = FB_BLANK_UNBLANK; 1152 backlight_update_status(bd); 1153 return 0; 1154 } 1155 1156 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc) 1157 { 1158 backlight_device_unregister(eeepc->backlight_device); 1159 eeepc->backlight_device = NULL; 1160 } 1161 1162 1163 /* 1164 * Input device (i.e. hotkeys) 1165 */ 1166 static int eeepc_input_init(struct eeepc_laptop *eeepc) 1167 { 1168 struct input_dev *input; 1169 int error; 1170 1171 input = input_allocate_device(); 1172 if (!input) 1173 return -ENOMEM; 1174 1175 input->name = "Asus EeePC extra buttons"; 1176 input->phys = EEEPC_LAPTOP_FILE "/input0"; 1177 input->id.bustype = BUS_HOST; 1178 input->dev.parent = &eeepc->platform_device->dev; 1179 1180 error = sparse_keymap_setup(input, eeepc_keymap, NULL); 1181 if (error) { 1182 pr_err("Unable to setup input device keymap\n"); 1183 goto err_free_dev; 1184 } 1185 1186 error = input_register_device(input); 1187 if (error) { 1188 pr_err("Unable to register input device\n"); 1189 goto err_free_dev; 1190 } 1191 1192 eeepc->inputdev = input; 1193 return 0; 1194 1195 err_free_dev: 1196 input_free_device(input); 1197 return error; 1198 } 1199 1200 static void eeepc_input_exit(struct eeepc_laptop *eeepc) 1201 { 1202 if (eeepc->inputdev) 1203 input_unregister_device(eeepc->inputdev); 1204 eeepc->inputdev = NULL; 1205 } 1206 1207 /* 1208 * ACPI driver 1209 */ 1210 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event) 1211 { 1212 if (!eeepc->inputdev) 1213 return; 1214 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true)) 1215 pr_info("Unknown key %x pressed\n", event); 1216 } 1217 1218 static void eeepc_acpi_notify(struct acpi_device *device, u32 event) 1219 { 1220 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1221 int old_brightness, new_brightness; 1222 u16 count; 1223 1224 if (event > ACPI_MAX_SYS_NOTIFY) 1225 return; 1226 count = eeepc->event_count[event % 128]++; 1227 acpi_bus_generate_netlink_event(device->pnp.device_class, 1228 dev_name(&device->dev), event, 1229 count); 1230 1231 /* Brightness events are special */ 1232 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) { 1233 eeepc_input_notify(eeepc, event); 1234 return; 1235 } 1236 1237 /* Ignore them completely if the acpi video driver is used */ 1238 if (!eeepc->backlight_device) 1239 return; 1240 1241 /* Update the backlight device. */ 1242 old_brightness = eeepc_backlight_notify(eeepc); 1243 1244 /* Convert event to keypress (obsolescent hack) */ 1245 new_brightness = event - NOTIFY_BRN_MIN; 1246 1247 if (new_brightness < old_brightness) { 1248 event = NOTIFY_BRN_MIN; /* brightness down */ 1249 } else if (new_brightness > old_brightness) { 1250 event = NOTIFY_BRN_MAX; /* brightness up */ 1251 } else { 1252 /* 1253 * no change in brightness - already at min/max, 1254 * event will be desired value (or else ignored) 1255 */ 1256 } 1257 eeepc_input_notify(eeepc, event); 1258 } 1259 1260 static void eeepc_dmi_check(struct eeepc_laptop *eeepc) 1261 { 1262 const char *model; 1263 1264 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1265 if (!model) 1266 return; 1267 1268 /* 1269 * Blacklist for setting cpufv (cpu speed). 1270 * 1271 * EeePC 4G ("701") implements CFVS, but it is not supported 1272 * by the pre-installed OS, and the original option to change it 1273 * in the BIOS setup screen was removed in later versions. 1274 * 1275 * Judging by the lack of "Super Hybrid Engine" on Asus product pages, 1276 * this applies to all "701" models (4G/4G Surf/2G Surf). 1277 * 1278 * So Asus made a deliberate decision not to support it on this model. 1279 * We have several reports that using it can cause the system to hang 1280 * 1281 * The hang has also been reported on a "702" (Model name "8G"?). 1282 * 1283 * We avoid dmi_check_system() / dmi_match(), because they use 1284 * substring matching. We don't want to affect the "701SD" 1285 * and "701SDX" models, because they do support S.H.E. 1286 */ 1287 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) { 1288 eeepc->cpufv_disabled = true; 1289 pr_info("model %s does not officially support setting cpu speed\n", 1290 model); 1291 pr_info("cpufv disabled to avoid instability\n"); 1292 } 1293 1294 /* 1295 * Blacklist for wlan hotplug 1296 * 1297 * Eeepc 1005HA doesn't work like others models and don't need the 1298 * hotplug code. In fact, current hotplug code seems to unplug another 1299 * device... 1300 */ 1301 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 || 1302 strcmp(model, "1005PE") == 0) { 1303 eeepc->hotplug_disabled = true; 1304 pr_info("wlan hotplug disabled\n"); 1305 } 1306 } 1307 1308 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name) 1309 { 1310 int dummy; 1311 1312 /* Some BIOSes do not report cm although it is available. 1313 Check if cm_getv[cm] works and, if yes, assume cm should be set. */ 1314 if (!(eeepc->cm_supported & (1 << cm)) 1315 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) { 1316 pr_info("%s (%x) not reported by BIOS, enabling anyway\n", 1317 name, 1 << cm); 1318 eeepc->cm_supported |= 1 << cm; 1319 } 1320 } 1321 1322 static void cmsg_quirks(struct eeepc_laptop *eeepc) 1323 { 1324 cmsg_quirk(eeepc, CM_ASL_LID, "LID"); 1325 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE"); 1326 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER"); 1327 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD"); 1328 } 1329 1330 static int eeepc_acpi_init(struct eeepc_laptop *eeepc) 1331 { 1332 unsigned int init_flags; 1333 int result; 1334 1335 result = acpi_bus_get_status(eeepc->device); 1336 if (result) 1337 return result; 1338 if (!eeepc->device->status.present) { 1339 pr_err("Hotkey device not present, aborting\n"); 1340 return -ENODEV; 1341 } 1342 1343 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH; 1344 pr_notice("Hotkey init flags 0x%x\n", init_flags); 1345 1346 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) { 1347 pr_err("Hotkey initialization failed\n"); 1348 return -ENODEV; 1349 } 1350 1351 /* get control methods supported */ 1352 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) { 1353 pr_err("Get control methods supported failed\n"); 1354 return -ENODEV; 1355 } 1356 cmsg_quirks(eeepc); 1357 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported); 1358 1359 return 0; 1360 } 1361 1362 static void eeepc_enable_camera(struct eeepc_laptop *eeepc) 1363 { 1364 /* 1365 * If the following call to set_acpi() fails, it's because there's no 1366 * camera so we can ignore the error. 1367 */ 1368 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0) 1369 set_acpi(eeepc, CM_ASL_CAMERA, 1); 1370 } 1371 1372 static bool eeepc_device_present; 1373 1374 static int eeepc_acpi_add(struct acpi_device *device) 1375 { 1376 struct eeepc_laptop *eeepc; 1377 int result; 1378 1379 pr_notice(EEEPC_LAPTOP_NAME "\n"); 1380 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL); 1381 if (!eeepc) 1382 return -ENOMEM; 1383 eeepc->handle = device->handle; 1384 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME); 1385 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS); 1386 device->driver_data = eeepc; 1387 eeepc->device = device; 1388 1389 eeepc->hotplug_disabled = hotplug_disabled; 1390 1391 eeepc_dmi_check(eeepc); 1392 1393 result = eeepc_acpi_init(eeepc); 1394 if (result) 1395 goto fail_platform; 1396 eeepc_enable_camera(eeepc); 1397 1398 /* 1399 * Register the platform device first. It is used as a parent for the 1400 * sub-devices below. 1401 * 1402 * Note that if there are multiple instances of this ACPI device it 1403 * will bail out, because the platform device is registered with a 1404 * fixed name. Of course it doesn't make sense to have more than one, 1405 * and machine-specific scripts find the fixed name convenient. But 1406 * It's also good for us to exclude multiple instances because both 1407 * our hwmon and our wlan rfkill subdevice use global ACPI objects 1408 * (the EC and the wlan PCI slot respectively). 1409 */ 1410 result = eeepc_platform_init(eeepc); 1411 if (result) 1412 goto fail_platform; 1413 1414 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) { 1415 result = eeepc_backlight_init(eeepc); 1416 if (result) 1417 goto fail_backlight; 1418 } 1419 1420 result = eeepc_input_init(eeepc); 1421 if (result) 1422 goto fail_input; 1423 1424 result = eeepc_hwmon_init(eeepc); 1425 if (result) 1426 goto fail_hwmon; 1427 1428 result = eeepc_led_init(eeepc); 1429 if (result) 1430 goto fail_led; 1431 1432 result = eeepc_rfkill_init(eeepc); 1433 if (result) 1434 goto fail_rfkill; 1435 1436 eeepc_device_present = true; 1437 return 0; 1438 1439 fail_rfkill: 1440 eeepc_led_exit(eeepc); 1441 fail_led: 1442 fail_hwmon: 1443 eeepc_input_exit(eeepc); 1444 fail_input: 1445 eeepc_backlight_exit(eeepc); 1446 fail_backlight: 1447 eeepc_platform_exit(eeepc); 1448 fail_platform: 1449 kfree(eeepc); 1450 1451 return result; 1452 } 1453 1454 static int eeepc_acpi_remove(struct acpi_device *device) 1455 { 1456 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1457 1458 eeepc_backlight_exit(eeepc); 1459 eeepc_rfkill_exit(eeepc); 1460 eeepc_input_exit(eeepc); 1461 eeepc_led_exit(eeepc); 1462 eeepc_platform_exit(eeepc); 1463 1464 kfree(eeepc); 1465 return 0; 1466 } 1467 1468 1469 static const struct acpi_device_id eeepc_device_ids[] = { 1470 {EEEPC_ACPI_HID, 0}, 1471 {"", 0}, 1472 }; 1473 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids); 1474 1475 static struct acpi_driver eeepc_acpi_driver = { 1476 .name = EEEPC_LAPTOP_NAME, 1477 .class = EEEPC_ACPI_CLASS, 1478 .owner = THIS_MODULE, 1479 .ids = eeepc_device_ids, 1480 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 1481 .ops = { 1482 .add = eeepc_acpi_add, 1483 .remove = eeepc_acpi_remove, 1484 .notify = eeepc_acpi_notify, 1485 }, 1486 }; 1487 1488 1489 static int __init eeepc_laptop_init(void) 1490 { 1491 int result; 1492 1493 result = platform_driver_register(&platform_driver); 1494 if (result < 0) 1495 return result; 1496 1497 result = acpi_bus_register_driver(&eeepc_acpi_driver); 1498 if (result < 0) 1499 goto fail_acpi_driver; 1500 1501 if (!eeepc_device_present) { 1502 result = -ENODEV; 1503 goto fail_no_device; 1504 } 1505 1506 return 0; 1507 1508 fail_no_device: 1509 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1510 fail_acpi_driver: 1511 platform_driver_unregister(&platform_driver); 1512 return result; 1513 } 1514 1515 static void __exit eeepc_laptop_exit(void) 1516 { 1517 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1518 platform_driver_unregister(&platform_driver); 1519 } 1520 1521 module_init(eeepc_laptop_init); 1522 module_exit(eeepc_laptop_exit); 1523