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 41 #define EEEPC_LAPTOP_VERSION "0.1" 42 #define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver" 43 #define EEEPC_LAPTOP_FILE "eeepc" 44 45 #define EEEPC_ACPI_CLASS "hotkey" 46 #define EEEPC_ACPI_DEVICE_NAME "Hotkey" 47 #define EEEPC_ACPI_HID "ASUS010" 48 49 MODULE_AUTHOR("Corentin Chary, Eric Cooper"); 50 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME); 51 MODULE_LICENSE("GPL"); 52 53 static bool hotplug_disabled; 54 55 module_param(hotplug_disabled, bool, 0444); 56 MODULE_PARM_DESC(hotplug_disabled, 57 "Disable hotplug for wireless device. " 58 "If your laptop need that, please report to " 59 "acpi4asus-user@lists.sourceforge.net."); 60 61 /* 62 * Definitions for Asus EeePC 63 */ 64 #define NOTIFY_BRN_MIN 0x20 65 #define NOTIFY_BRN_MAX 0x2f 66 67 enum { 68 DISABLE_ASL_WLAN = 0x0001, 69 DISABLE_ASL_BLUETOOTH = 0x0002, 70 DISABLE_ASL_IRDA = 0x0004, 71 DISABLE_ASL_CAMERA = 0x0008, 72 DISABLE_ASL_TV = 0x0010, 73 DISABLE_ASL_GPS = 0x0020, 74 DISABLE_ASL_DISPLAYSWITCH = 0x0040, 75 DISABLE_ASL_MODEM = 0x0080, 76 DISABLE_ASL_CARDREADER = 0x0100, 77 DISABLE_ASL_3G = 0x0200, 78 DISABLE_ASL_WIMAX = 0x0400, 79 DISABLE_ASL_HWCF = 0x0800 80 }; 81 82 enum { 83 CM_ASL_WLAN = 0, 84 CM_ASL_BLUETOOTH, 85 CM_ASL_IRDA, 86 CM_ASL_1394, 87 CM_ASL_CAMERA, 88 CM_ASL_TV, 89 CM_ASL_GPS, 90 CM_ASL_DVDROM, 91 CM_ASL_DISPLAYSWITCH, 92 CM_ASL_PANELBRIGHT, 93 CM_ASL_BIOSFLASH, 94 CM_ASL_ACPIFLASH, 95 CM_ASL_CPUFV, 96 CM_ASL_CPUTEMPERATURE, 97 CM_ASL_FANCPU, 98 CM_ASL_FANCHASSIS, 99 CM_ASL_USBPORT1, 100 CM_ASL_USBPORT2, 101 CM_ASL_USBPORT3, 102 CM_ASL_MODEM, 103 CM_ASL_CARDREADER, 104 CM_ASL_3G, 105 CM_ASL_WIMAX, 106 CM_ASL_HWCF, 107 CM_ASL_LID, 108 CM_ASL_TYPE, 109 CM_ASL_PANELPOWER, /*P901*/ 110 CM_ASL_TPD 111 }; 112 113 static const char *cm_getv[] = { 114 "WLDG", "BTHG", NULL, NULL, 115 "CAMG", NULL, NULL, NULL, 116 NULL, "PBLG", NULL, NULL, 117 "CFVG", NULL, NULL, NULL, 118 "USBG", NULL, NULL, "MODG", 119 "CRDG", "M3GG", "WIMG", "HWCF", 120 "LIDG", "TYPE", "PBPG", "TPDG" 121 }; 122 123 static const char *cm_setv[] = { 124 "WLDS", "BTHS", NULL, NULL, 125 "CAMS", NULL, NULL, NULL, 126 "SDSP", "PBLS", "HDPS", NULL, 127 "CFVS", NULL, NULL, NULL, 128 "USBG", NULL, NULL, "MODS", 129 "CRDS", "M3GS", "WIMS", NULL, 130 NULL, NULL, "PBPS", "TPDS" 131 }; 132 133 static const struct key_entry eeepc_keymap[] = { 134 { KE_KEY, 0x10, { KEY_WLAN } }, 135 { KE_KEY, 0x11, { KEY_WLAN } }, 136 { KE_KEY, 0x12, { KEY_PROG1 } }, 137 { KE_KEY, 0x13, { KEY_MUTE } }, 138 { KE_KEY, 0x14, { KEY_VOLUMEDOWN } }, 139 { KE_KEY, 0x15, { KEY_VOLUMEUP } }, 140 { KE_KEY, 0x16, { KEY_DISPLAY_OFF } }, 141 { KE_KEY, 0x1a, { KEY_COFFEE } }, 142 { KE_KEY, 0x1b, { KEY_ZOOM } }, 143 { KE_KEY, 0x1c, { KEY_PROG2 } }, 144 { KE_KEY, 0x1d, { KEY_PROG3 } }, 145 { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } }, 146 { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } }, 147 { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } }, 148 { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } }, 149 { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } }, 150 { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */ 151 { KE_KEY, 0x38, { KEY_F14 } }, 152 { KE_END, 0 }, 153 }; 154 155 /* 156 * This is the main structure, we can use it to store useful information 157 */ 158 struct eeepc_laptop { 159 acpi_handle handle; /* the handle of the acpi device */ 160 u32 cm_supported; /* the control methods supported 161 by this BIOS */ 162 bool cpufv_disabled; 163 bool hotplug_disabled; 164 u16 event_count[128]; /* count for each event */ 165 166 struct platform_device *platform_device; 167 struct acpi_device *device; /* the device we are in */ 168 struct backlight_device *backlight_device; 169 170 struct input_dev *inputdev; 171 172 struct rfkill *wlan_rfkill; 173 struct rfkill *bluetooth_rfkill; 174 struct rfkill *wwan3g_rfkill; 175 struct rfkill *wimax_rfkill; 176 177 struct hotplug_slot *hotplug_slot; 178 struct mutex hotplug_lock; 179 180 struct led_classdev tpd_led; 181 int tpd_led_wk; 182 struct workqueue_struct *led_workqueue; 183 struct work_struct tpd_led_work; 184 }; 185 186 /* 187 * ACPI Helpers 188 */ 189 static int write_acpi_int(acpi_handle handle, const char *method, int val) 190 { 191 acpi_status status; 192 193 status = acpi_execute_simple_method(handle, (char *)method, val); 194 195 return (status == AE_OK ? 0 : -1); 196 } 197 198 static int read_acpi_int(acpi_handle handle, const char *method, int *val) 199 { 200 acpi_status status; 201 unsigned long long result; 202 203 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result); 204 if (ACPI_FAILURE(status)) { 205 *val = -1; 206 return -1; 207 } else { 208 *val = result; 209 return 0; 210 } 211 } 212 213 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value) 214 { 215 const char *method = cm_setv[cm]; 216 217 if (method == NULL) 218 return -ENODEV; 219 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 220 return -ENODEV; 221 222 if (write_acpi_int(eeepc->handle, method, value)) 223 pr_warn("Error writing %s\n", method); 224 return 0; 225 } 226 227 static int get_acpi(struct eeepc_laptop *eeepc, int cm) 228 { 229 const char *method = cm_getv[cm]; 230 int value; 231 232 if (method == NULL) 233 return -ENODEV; 234 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 235 return -ENODEV; 236 237 if (read_acpi_int(eeepc->handle, method, &value)) 238 pr_warn("Error reading %s\n", method); 239 return value; 240 } 241 242 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm, 243 acpi_handle *handle) 244 { 245 const char *method = cm_setv[cm]; 246 acpi_status status; 247 248 if (method == NULL) 249 return -ENODEV; 250 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 251 return -ENODEV; 252 253 status = acpi_get_handle(eeepc->handle, (char *)method, 254 handle); 255 if (status != AE_OK) { 256 pr_warn("Error finding %s\n", method); 257 return -ENODEV; 258 } 259 return 0; 260 } 261 262 263 /* 264 * Sys helpers 265 */ 266 static int parse_arg(const char *buf, unsigned long count, int *val) 267 { 268 if (!count) 269 return 0; 270 if (sscanf(buf, "%i", val) != 1) 271 return -EINVAL; 272 return count; 273 } 274 275 static ssize_t store_sys_acpi(struct device *dev, int cm, 276 const char *buf, size_t count) 277 { 278 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 279 int rv, value; 280 281 rv = parse_arg(buf, count, &value); 282 if (rv > 0) 283 value = set_acpi(eeepc, cm, value); 284 if (value < 0) 285 return -EIO; 286 return rv; 287 } 288 289 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf) 290 { 291 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 292 int value = get_acpi(eeepc, cm); 293 294 if (value < 0) 295 return -EIO; 296 return sprintf(buf, "%d\n", value); 297 } 298 299 #define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm) \ 300 static ssize_t show_##_name(struct device *dev, \ 301 struct device_attribute *attr, \ 302 char *buf) \ 303 { \ 304 return show_sys_acpi(dev, _cm, buf); \ 305 } \ 306 static ssize_t store_##_name(struct device *dev, \ 307 struct device_attribute *attr, \ 308 const char *buf, size_t count) \ 309 { \ 310 return store_sys_acpi(dev, _cm, buf, count); \ 311 } \ 312 static struct device_attribute dev_attr_##_name = { \ 313 .attr = { \ 314 .name = __stringify(_name), \ 315 .mode = _mode }, \ 316 .show = show_##_name, \ 317 .store = store_##_name, \ 318 } 319 320 EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA); 321 EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER); 322 EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH); 323 324 struct eeepc_cpufv { 325 int num; 326 int cur; 327 }; 328 329 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c) 330 { 331 c->cur = get_acpi(eeepc, CM_ASL_CPUFV); 332 c->num = (c->cur >> 8) & 0xff; 333 c->cur &= 0xff; 334 if (c->cur < 0 || c->num <= 0 || c->num > 12) 335 return -ENODEV; 336 return 0; 337 } 338 339 static ssize_t show_available_cpufv(struct device *dev, 340 struct device_attribute *attr, 341 char *buf) 342 { 343 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 344 struct eeepc_cpufv c; 345 int i; 346 ssize_t len = 0; 347 348 if (get_cpufv(eeepc, &c)) 349 return -ENODEV; 350 for (i = 0; i < c.num; i++) 351 len += sprintf(buf + len, "%d ", i); 352 len += sprintf(buf + len, "\n"); 353 return len; 354 } 355 356 static ssize_t show_cpufv(struct device *dev, 357 struct device_attribute *attr, 358 char *buf) 359 { 360 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 361 struct eeepc_cpufv c; 362 363 if (get_cpufv(eeepc, &c)) 364 return -ENODEV; 365 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur); 366 } 367 368 static ssize_t store_cpufv(struct device *dev, 369 struct device_attribute *attr, 370 const char *buf, size_t count) 371 { 372 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 373 struct eeepc_cpufv c; 374 int rv, value; 375 376 if (eeepc->cpufv_disabled) 377 return -EPERM; 378 if (get_cpufv(eeepc, &c)) 379 return -ENODEV; 380 rv = parse_arg(buf, count, &value); 381 if (rv < 0) 382 return rv; 383 if (!rv || value < 0 || value >= c.num) 384 return -EINVAL; 385 set_acpi(eeepc, CM_ASL_CPUFV, value); 386 return rv; 387 } 388 389 static ssize_t show_cpufv_disabled(struct device *dev, 390 struct device_attribute *attr, 391 char *buf) 392 { 393 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 394 395 return sprintf(buf, "%d\n", eeepc->cpufv_disabled); 396 } 397 398 static ssize_t store_cpufv_disabled(struct device *dev, 399 struct device_attribute *attr, 400 const char *buf, size_t count) 401 { 402 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 403 int rv, value; 404 405 rv = parse_arg(buf, count, &value); 406 if (rv < 0) 407 return rv; 408 409 switch (value) { 410 case 0: 411 if (eeepc->cpufv_disabled) 412 pr_warn("cpufv enabled (not officially supported " 413 "on this model)\n"); 414 eeepc->cpufv_disabled = false; 415 return rv; 416 case 1: 417 return -EPERM; 418 default: 419 return -EINVAL; 420 } 421 } 422 423 424 static struct device_attribute dev_attr_cpufv = { 425 .attr = { 426 .name = "cpufv", 427 .mode = 0644 }, 428 .show = show_cpufv, 429 .store = store_cpufv 430 }; 431 432 static struct device_attribute dev_attr_available_cpufv = { 433 .attr = { 434 .name = "available_cpufv", 435 .mode = 0444 }, 436 .show = show_available_cpufv 437 }; 438 439 static struct device_attribute dev_attr_cpufv_disabled = { 440 .attr = { 441 .name = "cpufv_disabled", 442 .mode = 0644 }, 443 .show = show_cpufv_disabled, 444 .store = store_cpufv_disabled 445 }; 446 447 448 static struct attribute *platform_attributes[] = { 449 &dev_attr_camera.attr, 450 &dev_attr_cardr.attr, 451 &dev_attr_disp.attr, 452 &dev_attr_cpufv.attr, 453 &dev_attr_available_cpufv.attr, 454 &dev_attr_cpufv_disabled.attr, 455 NULL 456 }; 457 458 static struct attribute_group platform_attribute_group = { 459 .attrs = platform_attributes 460 }; 461 462 static int eeepc_platform_init(struct eeepc_laptop *eeepc) 463 { 464 int result; 465 466 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1); 467 if (!eeepc->platform_device) 468 return -ENOMEM; 469 platform_set_drvdata(eeepc->platform_device, eeepc); 470 471 result = platform_device_add(eeepc->platform_device); 472 if (result) 473 goto fail_platform_device; 474 475 result = sysfs_create_group(&eeepc->platform_device->dev.kobj, 476 &platform_attribute_group); 477 if (result) 478 goto fail_sysfs; 479 return 0; 480 481 fail_sysfs: 482 platform_device_del(eeepc->platform_device); 483 fail_platform_device: 484 platform_device_put(eeepc->platform_device); 485 return result; 486 } 487 488 static void eeepc_platform_exit(struct eeepc_laptop *eeepc) 489 { 490 sysfs_remove_group(&eeepc->platform_device->dev.kobj, 491 &platform_attribute_group); 492 platform_device_unregister(eeepc->platform_device); 493 } 494 495 /* 496 * LEDs 497 */ 498 /* 499 * These functions actually update the LED's, and are called from a 500 * workqueue. By doing this as separate work rather than when the LED 501 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 502 * potentially bad time, such as a timer interrupt. 503 */ 504 static void tpd_led_update(struct work_struct *work) 505 { 506 struct eeepc_laptop *eeepc; 507 508 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work); 509 510 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk); 511 } 512 513 static void tpd_led_set(struct led_classdev *led_cdev, 514 enum led_brightness value) 515 { 516 struct eeepc_laptop *eeepc; 517 518 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 519 520 eeepc->tpd_led_wk = (value > 0) ? 1 : 0; 521 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 522 } 523 524 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 525 { 526 struct eeepc_laptop *eeepc; 527 528 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 529 530 return get_acpi(eeepc, CM_ASL_TPD); 531 } 532 533 static int eeepc_led_init(struct eeepc_laptop *eeepc) 534 { 535 int rv; 536 537 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV) 538 return 0; 539 540 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 541 if (!eeepc->led_workqueue) 542 return -ENOMEM; 543 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 544 545 eeepc->tpd_led.name = "eeepc::touchpad"; 546 eeepc->tpd_led.brightness_set = tpd_led_set; 547 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */ 548 eeepc->tpd_led.brightness_get = tpd_led_get; 549 eeepc->tpd_led.max_brightness = 1; 550 551 rv = led_classdev_register(&eeepc->platform_device->dev, 552 &eeepc->tpd_led); 553 if (rv) { 554 destroy_workqueue(eeepc->led_workqueue); 555 return rv; 556 } 557 558 return 0; 559 } 560 561 static void eeepc_led_exit(struct eeepc_laptop *eeepc) 562 { 563 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev)) 564 led_classdev_unregister(&eeepc->tpd_led); 565 if (eeepc->led_workqueue) 566 destroy_workqueue(eeepc->led_workqueue); 567 } 568 569 570 /* 571 * PCI hotplug (for wlan rfkill) 572 */ 573 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc) 574 { 575 if (get_acpi(eeepc, CM_ASL_WLAN) == 1) 576 return false; 577 return true; 578 } 579 580 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle) 581 { 582 struct pci_dev *port; 583 struct pci_dev *dev; 584 struct pci_bus *bus; 585 bool blocked = eeepc_wlan_rfkill_blocked(eeepc); 586 bool absent; 587 u32 l; 588 589 if (eeepc->wlan_rfkill) 590 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 591 592 mutex_lock(&eeepc->hotplug_lock); 593 pci_lock_rescan_remove(); 594 595 if (eeepc->hotplug_slot) { 596 port = acpi_get_pci_dev(handle); 597 if (!port) { 598 pr_warning("Unable to find port\n"); 599 goto out_unlock; 600 } 601 602 bus = port->subordinate; 603 604 if (!bus) { 605 pr_warn("Unable to find PCI bus 1?\n"); 606 goto out_put_dev; 607 } 608 609 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 610 pr_err("Unable to read PCI config space?\n"); 611 goto out_put_dev; 612 } 613 614 absent = (l == 0xffffffff); 615 616 if (blocked != absent) { 617 pr_warn("BIOS says wireless lan is %s, " 618 "but the pci device is %s\n", 619 blocked ? "blocked" : "unblocked", 620 absent ? "absent" : "present"); 621 pr_warn("skipped wireless hotplug as probably " 622 "inappropriate for this model\n"); 623 goto out_put_dev; 624 } 625 626 if (!blocked) { 627 dev = pci_get_slot(bus, 0); 628 if (dev) { 629 /* Device already present */ 630 pci_dev_put(dev); 631 goto out_put_dev; 632 } 633 dev = pci_scan_single_device(bus, 0); 634 if (dev) { 635 pci_bus_assign_resources(bus); 636 if (pci_bus_add_device(dev)) 637 pr_err("Unable to hotplug wifi\n"); 638 } 639 } else { 640 dev = pci_get_slot(bus, 0); 641 if (dev) { 642 pci_stop_and_remove_bus_device(dev); 643 pci_dev_put(dev); 644 } 645 } 646 out_put_dev: 647 pci_dev_put(port); 648 } 649 650 out_unlock: 651 pci_unlock_rescan_remove(); 652 mutex_unlock(&eeepc->hotplug_lock); 653 } 654 655 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node) 656 { 657 acpi_status status = AE_OK; 658 acpi_handle handle; 659 660 status = acpi_get_handle(NULL, node, &handle); 661 662 if (ACPI_SUCCESS(status)) 663 eeepc_rfkill_hotplug(eeepc, handle); 664 } 665 666 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 667 { 668 struct eeepc_laptop *eeepc = data; 669 670 if (event != ACPI_NOTIFY_BUS_CHECK) 671 return; 672 673 eeepc_rfkill_hotplug(eeepc, handle); 674 } 675 676 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc, 677 char *node) 678 { 679 acpi_status status; 680 acpi_handle handle; 681 682 status = acpi_get_handle(NULL, node, &handle); 683 684 if (ACPI_SUCCESS(status)) { 685 status = acpi_install_notify_handler(handle, 686 ACPI_SYSTEM_NOTIFY, 687 eeepc_rfkill_notify, 688 eeepc); 689 if (ACPI_FAILURE(status)) 690 pr_warn("Failed to register notify on %s\n", node); 691 692 /* 693 * Refresh pci hotplug in case the rfkill state was 694 * changed during setup. 695 */ 696 eeepc_rfkill_hotplug(eeepc, handle); 697 } else 698 return -ENODEV; 699 700 return 0; 701 } 702 703 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc, 704 char *node) 705 { 706 acpi_status status = AE_OK; 707 acpi_handle handle; 708 709 status = acpi_get_handle(NULL, node, &handle); 710 711 if (ACPI_SUCCESS(status)) { 712 status = acpi_remove_notify_handler(handle, 713 ACPI_SYSTEM_NOTIFY, 714 eeepc_rfkill_notify); 715 if (ACPI_FAILURE(status)) 716 pr_err("Error removing rfkill notify handler %s\n", 717 node); 718 /* 719 * Refresh pci hotplug in case the rfkill 720 * state was changed after 721 * eeepc_unregister_rfkill_notifier() 722 */ 723 eeepc_rfkill_hotplug(eeepc, handle); 724 } 725 } 726 727 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 728 u8 *value) 729 { 730 struct eeepc_laptop *eeepc = hotplug_slot->private; 731 int val = get_acpi(eeepc, CM_ASL_WLAN); 732 733 if (val == 1 || val == 0) 734 *value = val; 735 else 736 return -EINVAL; 737 738 return 0; 739 } 740 741 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 742 { 743 kfree(hotplug_slot->info); 744 kfree(hotplug_slot); 745 } 746 747 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 748 .owner = THIS_MODULE, 749 .get_adapter_status = eeepc_get_adapter_status, 750 .get_power_status = eeepc_get_adapter_status, 751 }; 752 753 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc) 754 { 755 int ret = -ENOMEM; 756 struct pci_bus *bus = pci_find_bus(0, 1); 757 758 if (!bus) { 759 pr_err("Unable to find wifi PCI bus\n"); 760 return -ENODEV; 761 } 762 763 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 764 if (!eeepc->hotplug_slot) 765 goto error_slot; 766 767 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 768 GFP_KERNEL); 769 if (!eeepc->hotplug_slot->info) 770 goto error_info; 771 772 eeepc->hotplug_slot->private = eeepc; 773 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 774 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 775 eeepc_get_adapter_status(eeepc->hotplug_slot, 776 &eeepc->hotplug_slot->info->adapter_status); 777 778 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 779 if (ret) { 780 pr_err("Unable to register hotplug slot - %d\n", ret); 781 goto error_register; 782 } 783 784 return 0; 785 786 error_register: 787 kfree(eeepc->hotplug_slot->info); 788 error_info: 789 kfree(eeepc->hotplug_slot); 790 eeepc->hotplug_slot = NULL; 791 error_slot: 792 return ret; 793 } 794 795 /* 796 * Rfkill devices 797 */ 798 static int eeepc_rfkill_set(void *data, bool blocked) 799 { 800 acpi_handle handle = data; 801 802 return write_acpi_int(handle, NULL, !blocked); 803 } 804 805 static const struct rfkill_ops eeepc_rfkill_ops = { 806 .set_block = eeepc_rfkill_set, 807 }; 808 809 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc, 810 struct rfkill **rfkill, 811 const char *name, 812 enum rfkill_type type, int cm) 813 { 814 acpi_handle handle; 815 int result; 816 817 result = acpi_setter_handle(eeepc, cm, &handle); 818 if (result < 0) 819 return result; 820 821 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 822 &eeepc_rfkill_ops, handle); 823 824 if (!*rfkill) 825 return -EINVAL; 826 827 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1); 828 result = rfkill_register(*rfkill); 829 if (result) { 830 rfkill_destroy(*rfkill); 831 *rfkill = NULL; 832 return result; 833 } 834 return 0; 835 } 836 837 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc) 838 { 839 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 840 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 841 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 842 if (eeepc->wlan_rfkill) { 843 rfkill_unregister(eeepc->wlan_rfkill); 844 rfkill_destroy(eeepc->wlan_rfkill); 845 eeepc->wlan_rfkill = NULL; 846 } 847 848 if (eeepc->hotplug_slot) 849 pci_hp_deregister(eeepc->hotplug_slot); 850 851 if (eeepc->bluetooth_rfkill) { 852 rfkill_unregister(eeepc->bluetooth_rfkill); 853 rfkill_destroy(eeepc->bluetooth_rfkill); 854 eeepc->bluetooth_rfkill = NULL; 855 } 856 if (eeepc->wwan3g_rfkill) { 857 rfkill_unregister(eeepc->wwan3g_rfkill); 858 rfkill_destroy(eeepc->wwan3g_rfkill); 859 eeepc->wwan3g_rfkill = NULL; 860 } 861 if (eeepc->wimax_rfkill) { 862 rfkill_unregister(eeepc->wimax_rfkill); 863 rfkill_destroy(eeepc->wimax_rfkill); 864 eeepc->wimax_rfkill = NULL; 865 } 866 } 867 868 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc) 869 { 870 int result = 0; 871 872 mutex_init(&eeepc->hotplug_lock); 873 874 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 875 "eeepc-wlan", RFKILL_TYPE_WLAN, 876 CM_ASL_WLAN); 877 878 if (result && result != -ENODEV) 879 goto exit; 880 881 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 882 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 883 CM_ASL_BLUETOOTH); 884 885 if (result && result != -ENODEV) 886 goto exit; 887 888 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 889 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 890 CM_ASL_3G); 891 892 if (result && result != -ENODEV) 893 goto exit; 894 895 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, 896 "eeepc-wimax", RFKILL_TYPE_WIMAX, 897 CM_ASL_WIMAX); 898 899 if (result && result != -ENODEV) 900 goto exit; 901 902 if (eeepc->hotplug_disabled) 903 return 0; 904 905 result = eeepc_setup_pci_hotplug(eeepc); 906 /* 907 * If we get -EBUSY then something else is handling the PCI hotplug - 908 * don't fail in this case 909 */ 910 if (result == -EBUSY) 911 result = 0; 912 913 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 914 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 915 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 916 917 exit: 918 if (result && result != -ENODEV) 919 eeepc_rfkill_exit(eeepc); 920 return result; 921 } 922 923 /* 924 * Platform driver - hibernate/resume callbacks 925 */ 926 static int eeepc_hotk_thaw(struct device *device) 927 { 928 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 929 930 if (eeepc->wlan_rfkill) { 931 bool wlan; 932 933 /* 934 * Work around bios bug - acpi _PTS turns off the wireless led 935 * during suspend. Normally it restores it on resume, but 936 * we should kick it ourselves in case hibernation is aborted. 937 */ 938 wlan = get_acpi(eeepc, CM_ASL_WLAN); 939 set_acpi(eeepc, CM_ASL_WLAN, wlan); 940 } 941 942 return 0; 943 } 944 945 static int eeepc_hotk_restore(struct device *device) 946 { 947 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 948 949 /* Refresh both wlan rfkill state and pci hotplug */ 950 if (eeepc->wlan_rfkill) { 951 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P5"); 952 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P6"); 953 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P7"); 954 } 955 956 if (eeepc->bluetooth_rfkill) 957 rfkill_set_sw_state(eeepc->bluetooth_rfkill, 958 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1); 959 if (eeepc->wwan3g_rfkill) 960 rfkill_set_sw_state(eeepc->wwan3g_rfkill, 961 get_acpi(eeepc, CM_ASL_3G) != 1); 962 if (eeepc->wimax_rfkill) 963 rfkill_set_sw_state(eeepc->wimax_rfkill, 964 get_acpi(eeepc, CM_ASL_WIMAX) != 1); 965 966 return 0; 967 } 968 969 static const struct dev_pm_ops eeepc_pm_ops = { 970 .thaw = eeepc_hotk_thaw, 971 .restore = eeepc_hotk_restore, 972 }; 973 974 static struct platform_driver platform_driver = { 975 .driver = { 976 .name = EEEPC_LAPTOP_FILE, 977 .owner = THIS_MODULE, 978 .pm = &eeepc_pm_ops, 979 } 980 }; 981 982 /* 983 * Hwmon device 984 */ 985 986 #define EEEPC_EC_SC00 0x61 987 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */ 988 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */ 989 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */ 990 991 #define EEEPC_EC_SFB0 0xD0 992 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */ 993 994 static int eeepc_get_fan_pwm(void) 995 { 996 u8 value = 0; 997 998 ec_read(EEEPC_EC_FAN_PWM, &value); 999 return value * 255 / 100; 1000 } 1001 1002 static void eeepc_set_fan_pwm(int value) 1003 { 1004 value = clamp_val(value, 0, 255); 1005 value = value * 100 / 255; 1006 ec_write(EEEPC_EC_FAN_PWM, value); 1007 } 1008 1009 static int eeepc_get_fan_rpm(void) 1010 { 1011 u8 high = 0; 1012 u8 low = 0; 1013 1014 ec_read(EEEPC_EC_FAN_HRPM, &high); 1015 ec_read(EEEPC_EC_FAN_LRPM, &low); 1016 return high << 8 | low; 1017 } 1018 1019 static int eeepc_get_fan_ctrl(void) 1020 { 1021 u8 value = 0; 1022 1023 ec_read(EEEPC_EC_FAN_CTRL, &value); 1024 if (value & 0x02) 1025 return 1; /* manual */ 1026 else 1027 return 2; /* automatic */ 1028 } 1029 1030 static void eeepc_set_fan_ctrl(int manual) 1031 { 1032 u8 value = 0; 1033 1034 ec_read(EEEPC_EC_FAN_CTRL, &value); 1035 if (manual == 1) 1036 value |= 0x02; 1037 else 1038 value &= ~0x02; 1039 ec_write(EEEPC_EC_FAN_CTRL, value); 1040 } 1041 1042 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count) 1043 { 1044 int rv, value; 1045 1046 rv = parse_arg(buf, count, &value); 1047 if (rv > 0) 1048 set(value); 1049 return rv; 1050 } 1051 1052 static ssize_t show_sys_hwmon(int (*get)(void), char *buf) 1053 { 1054 return sprintf(buf, "%d\n", get()); 1055 } 1056 1057 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \ 1058 static ssize_t show_##_name(struct device *dev, \ 1059 struct device_attribute *attr, \ 1060 char *buf) \ 1061 { \ 1062 return show_sys_hwmon(_set, buf); \ 1063 } \ 1064 static ssize_t store_##_name(struct device *dev, \ 1065 struct device_attribute *attr, \ 1066 const char *buf, size_t count) \ 1067 { \ 1068 return store_sys_hwmon(_get, buf, count); \ 1069 } \ 1070 static DEVICE_ATTR(_name, _mode, show_##_name, store_##_name); 1071 1072 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL); 1073 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR, 1074 eeepc_get_fan_pwm, eeepc_set_fan_pwm); 1075 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, 1076 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl); 1077 1078 static struct attribute *hwmon_attrs[] = { 1079 &dev_attr_pwm1.attr, 1080 &dev_attr_fan1_input.attr, 1081 &dev_attr_pwm1_enable.attr, 1082 NULL 1083 }; 1084 ATTRIBUTE_GROUPS(hwmon); 1085 1086 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc) 1087 { 1088 struct device *dev = &eeepc->platform_device->dev; 1089 struct device *hwmon; 1090 1091 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL, 1092 hwmon_groups); 1093 if (IS_ERR(hwmon)) { 1094 pr_err("Could not register eeepc hwmon device\n"); 1095 return PTR_ERR(hwmon); 1096 } 1097 return 0; 1098 } 1099 1100 /* 1101 * Backlight device 1102 */ 1103 static int read_brightness(struct backlight_device *bd) 1104 { 1105 struct eeepc_laptop *eeepc = bl_get_data(bd); 1106 1107 return get_acpi(eeepc, CM_ASL_PANELBRIGHT); 1108 } 1109 1110 static int set_brightness(struct backlight_device *bd, int value) 1111 { 1112 struct eeepc_laptop *eeepc = bl_get_data(bd); 1113 1114 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value); 1115 } 1116 1117 static int update_bl_status(struct backlight_device *bd) 1118 { 1119 return set_brightness(bd, bd->props.brightness); 1120 } 1121 1122 static const struct backlight_ops eeepcbl_ops = { 1123 .get_brightness = read_brightness, 1124 .update_status = update_bl_status, 1125 }; 1126 1127 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc) 1128 { 1129 struct backlight_device *bd = eeepc->backlight_device; 1130 int old = bd->props.brightness; 1131 1132 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 1133 1134 return old; 1135 } 1136 1137 static int eeepc_backlight_init(struct eeepc_laptop *eeepc) 1138 { 1139 struct backlight_properties props; 1140 struct backlight_device *bd; 1141 1142 memset(&props, 0, sizeof(struct backlight_properties)); 1143 props.type = BACKLIGHT_PLATFORM; 1144 props.max_brightness = 15; 1145 bd = backlight_device_register(EEEPC_LAPTOP_FILE, 1146 &eeepc->platform_device->dev, eeepc, 1147 &eeepcbl_ops, &props); 1148 if (IS_ERR(bd)) { 1149 pr_err("Could not register eeepc backlight device\n"); 1150 eeepc->backlight_device = NULL; 1151 return PTR_ERR(bd); 1152 } 1153 eeepc->backlight_device = bd; 1154 bd->props.brightness = read_brightness(bd); 1155 bd->props.power = FB_BLANK_UNBLANK; 1156 backlight_update_status(bd); 1157 return 0; 1158 } 1159 1160 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc) 1161 { 1162 if (eeepc->backlight_device) 1163 backlight_device_unregister(eeepc->backlight_device); 1164 eeepc->backlight_device = NULL; 1165 } 1166 1167 1168 /* 1169 * Input device (i.e. hotkeys) 1170 */ 1171 static int eeepc_input_init(struct eeepc_laptop *eeepc) 1172 { 1173 struct input_dev *input; 1174 int error; 1175 1176 input = input_allocate_device(); 1177 if (!input) 1178 return -ENOMEM; 1179 1180 input->name = "Asus EeePC extra buttons"; 1181 input->phys = EEEPC_LAPTOP_FILE "/input0"; 1182 input->id.bustype = BUS_HOST; 1183 input->dev.parent = &eeepc->platform_device->dev; 1184 1185 error = sparse_keymap_setup(input, eeepc_keymap, NULL); 1186 if (error) { 1187 pr_err("Unable to setup input device keymap\n"); 1188 goto err_free_dev; 1189 } 1190 1191 error = input_register_device(input); 1192 if (error) { 1193 pr_err("Unable to register input device\n"); 1194 goto err_free_keymap; 1195 } 1196 1197 eeepc->inputdev = input; 1198 return 0; 1199 1200 err_free_keymap: 1201 sparse_keymap_free(input); 1202 err_free_dev: 1203 input_free_device(input); 1204 return error; 1205 } 1206 1207 static void eeepc_input_exit(struct eeepc_laptop *eeepc) 1208 { 1209 if (eeepc->inputdev) { 1210 sparse_keymap_free(eeepc->inputdev); 1211 input_unregister_device(eeepc->inputdev); 1212 } 1213 eeepc->inputdev = NULL; 1214 } 1215 1216 /* 1217 * ACPI driver 1218 */ 1219 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event) 1220 { 1221 if (!eeepc->inputdev) 1222 return ; 1223 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true)) 1224 pr_info("Unknown key %x pressed\n", event); 1225 } 1226 1227 static void eeepc_acpi_notify(struct acpi_device *device, u32 event) 1228 { 1229 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1230 u16 count; 1231 1232 if (event > ACPI_MAX_SYS_NOTIFY) 1233 return; 1234 count = eeepc->event_count[event % 128]++; 1235 acpi_bus_generate_netlink_event(device->pnp.device_class, 1236 dev_name(&device->dev), event, 1237 count); 1238 1239 /* Brightness events are special */ 1240 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) { 1241 1242 /* Ignore them completely if the acpi video driver is used */ 1243 if (eeepc->backlight_device != NULL) { 1244 int old_brightness, new_brightness; 1245 1246 /* Update the backlight device. */ 1247 old_brightness = eeepc_backlight_notify(eeepc); 1248 1249 /* Convert event to keypress (obsolescent hack) */ 1250 new_brightness = event - NOTIFY_BRN_MIN; 1251 1252 if (new_brightness < old_brightness) { 1253 event = NOTIFY_BRN_MIN; /* brightness down */ 1254 } else if (new_brightness > old_brightness) { 1255 event = NOTIFY_BRN_MAX; /* brightness up */ 1256 } else { 1257 /* 1258 * no change in brightness - already at min/max, 1259 * event will be desired value (or else ignored) 1260 */ 1261 } 1262 eeepc_input_notify(eeepc, event); 1263 } 1264 } else { 1265 /* Everything else is a bona-fide keypress event */ 1266 eeepc_input_notify(eeepc, event); 1267 } 1268 } 1269 1270 static void eeepc_dmi_check(struct eeepc_laptop *eeepc) 1271 { 1272 const char *model; 1273 1274 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1275 if (!model) 1276 return; 1277 1278 /* 1279 * Blacklist for setting cpufv (cpu speed). 1280 * 1281 * EeePC 4G ("701") implements CFVS, but it is not supported 1282 * by the pre-installed OS, and the original option to change it 1283 * in the BIOS setup screen was removed in later versions. 1284 * 1285 * Judging by the lack of "Super Hybrid Engine" on Asus product pages, 1286 * this applies to all "701" models (4G/4G Surf/2G Surf). 1287 * 1288 * So Asus made a deliberate decision not to support it on this model. 1289 * We have several reports that using it can cause the system to hang 1290 * 1291 * The hang has also been reported on a "702" (Model name "8G"?). 1292 * 1293 * We avoid dmi_check_system() / dmi_match(), because they use 1294 * substring matching. We don't want to affect the "701SD" 1295 * and "701SDX" models, because they do support S.H.E. 1296 */ 1297 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) { 1298 eeepc->cpufv_disabled = true; 1299 pr_info("model %s does not officially support setting cpu " 1300 "speed\n", model); 1301 pr_info("cpufv disabled to avoid instability\n"); 1302 } 1303 1304 /* 1305 * Blacklist for wlan hotplug 1306 * 1307 * Eeepc 1005HA doesn't work like others models and don't need the 1308 * hotplug code. In fact, current hotplug code seems to unplug another 1309 * device... 1310 */ 1311 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 || 1312 strcmp(model, "1005PE") == 0) { 1313 eeepc->hotplug_disabled = true; 1314 pr_info("wlan hotplug disabled\n"); 1315 } 1316 } 1317 1318 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name) 1319 { 1320 int dummy; 1321 1322 /* Some BIOSes do not report cm although it is available. 1323 Check if cm_getv[cm] works and, if yes, assume cm should be set. */ 1324 if (!(eeepc->cm_supported & (1 << cm)) 1325 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) { 1326 pr_info("%s (%x) not reported by BIOS," 1327 " enabling anyway\n", name, 1 << cm); 1328 eeepc->cm_supported |= 1 << cm; 1329 } 1330 } 1331 1332 static void cmsg_quirks(struct eeepc_laptop *eeepc) 1333 { 1334 cmsg_quirk(eeepc, CM_ASL_LID, "LID"); 1335 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE"); 1336 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER"); 1337 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD"); 1338 } 1339 1340 static int eeepc_acpi_init(struct eeepc_laptop *eeepc) 1341 { 1342 unsigned int init_flags; 1343 int result; 1344 1345 result = acpi_bus_get_status(eeepc->device); 1346 if (result) 1347 return result; 1348 if (!eeepc->device->status.present) { 1349 pr_err("Hotkey device not present, aborting\n"); 1350 return -ENODEV; 1351 } 1352 1353 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH; 1354 pr_notice("Hotkey init flags 0x%x\n", init_flags); 1355 1356 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) { 1357 pr_err("Hotkey initialization failed\n"); 1358 return -ENODEV; 1359 } 1360 1361 /* get control methods supported */ 1362 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) { 1363 pr_err("Get control methods supported failed\n"); 1364 return -ENODEV; 1365 } 1366 cmsg_quirks(eeepc); 1367 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported); 1368 1369 return 0; 1370 } 1371 1372 static void eeepc_enable_camera(struct eeepc_laptop *eeepc) 1373 { 1374 /* 1375 * If the following call to set_acpi() fails, it's because there's no 1376 * camera so we can ignore the error. 1377 */ 1378 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0) 1379 set_acpi(eeepc, CM_ASL_CAMERA, 1); 1380 } 1381 1382 static bool eeepc_device_present; 1383 1384 static int eeepc_acpi_add(struct acpi_device *device) 1385 { 1386 struct eeepc_laptop *eeepc; 1387 int result; 1388 1389 pr_notice(EEEPC_LAPTOP_NAME "\n"); 1390 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL); 1391 if (!eeepc) 1392 return -ENOMEM; 1393 eeepc->handle = device->handle; 1394 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME); 1395 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS); 1396 device->driver_data = eeepc; 1397 eeepc->device = device; 1398 1399 eeepc->hotplug_disabled = hotplug_disabled; 1400 1401 eeepc_dmi_check(eeepc); 1402 1403 result = eeepc_acpi_init(eeepc); 1404 if (result) 1405 goto fail_platform; 1406 eeepc_enable_camera(eeepc); 1407 1408 /* 1409 * Register the platform device first. It is used as a parent for the 1410 * sub-devices below. 1411 * 1412 * Note that if there are multiple instances of this ACPI device it 1413 * will bail out, because the platform device is registered with a 1414 * fixed name. Of course it doesn't make sense to have more than one, 1415 * and machine-specific scripts find the fixed name convenient. But 1416 * It's also good for us to exclude multiple instances because both 1417 * our hwmon and our wlan rfkill subdevice use global ACPI objects 1418 * (the EC and the wlan PCI slot respectively). 1419 */ 1420 result = eeepc_platform_init(eeepc); 1421 if (result) 1422 goto fail_platform; 1423 1424 if (!acpi_video_backlight_support()) { 1425 result = eeepc_backlight_init(eeepc); 1426 if (result) 1427 goto fail_backlight; 1428 } else 1429 pr_info("Backlight controlled by ACPI video driver\n"); 1430 1431 result = eeepc_input_init(eeepc); 1432 if (result) 1433 goto fail_input; 1434 1435 result = eeepc_hwmon_init(eeepc); 1436 if (result) 1437 goto fail_hwmon; 1438 1439 result = eeepc_led_init(eeepc); 1440 if (result) 1441 goto fail_led; 1442 1443 result = eeepc_rfkill_init(eeepc); 1444 if (result) 1445 goto fail_rfkill; 1446 1447 eeepc_device_present = true; 1448 return 0; 1449 1450 fail_rfkill: 1451 eeepc_led_exit(eeepc); 1452 fail_led: 1453 fail_hwmon: 1454 eeepc_input_exit(eeepc); 1455 fail_input: 1456 eeepc_backlight_exit(eeepc); 1457 fail_backlight: 1458 eeepc_platform_exit(eeepc); 1459 fail_platform: 1460 kfree(eeepc); 1461 1462 return result; 1463 } 1464 1465 static int eeepc_acpi_remove(struct acpi_device *device) 1466 { 1467 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1468 1469 eeepc_backlight_exit(eeepc); 1470 eeepc_rfkill_exit(eeepc); 1471 eeepc_input_exit(eeepc); 1472 eeepc_led_exit(eeepc); 1473 eeepc_platform_exit(eeepc); 1474 1475 kfree(eeepc); 1476 return 0; 1477 } 1478 1479 1480 static const struct acpi_device_id eeepc_device_ids[] = { 1481 {EEEPC_ACPI_HID, 0}, 1482 {"", 0}, 1483 }; 1484 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids); 1485 1486 static struct acpi_driver eeepc_acpi_driver = { 1487 .name = EEEPC_LAPTOP_NAME, 1488 .class = EEEPC_ACPI_CLASS, 1489 .owner = THIS_MODULE, 1490 .ids = eeepc_device_ids, 1491 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 1492 .ops = { 1493 .add = eeepc_acpi_add, 1494 .remove = eeepc_acpi_remove, 1495 .notify = eeepc_acpi_notify, 1496 }, 1497 }; 1498 1499 1500 static int __init eeepc_laptop_init(void) 1501 { 1502 int result; 1503 1504 result = platform_driver_register(&platform_driver); 1505 if (result < 0) 1506 return result; 1507 1508 result = acpi_bus_register_driver(&eeepc_acpi_driver); 1509 if (result < 0) 1510 goto fail_acpi_driver; 1511 1512 if (!eeepc_device_present) { 1513 result = -ENODEV; 1514 goto fail_no_device; 1515 } 1516 1517 return 0; 1518 1519 fail_no_device: 1520 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1521 fail_acpi_driver: 1522 platform_driver_unregister(&platform_driver); 1523 return result; 1524 } 1525 1526 static void __exit eeepc_laptop_exit(void) 1527 { 1528 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1529 platform_driver_unregister(&platform_driver); 1530 } 1531 1532 module_init(eeepc_laptop_init); 1533 module_exit(eeepc_laptop_exit); 1534