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 pci_bus_add_device(dev); 637 } 638 } else { 639 dev = pci_get_slot(bus, 0); 640 if (dev) { 641 pci_stop_and_remove_bus_device(dev); 642 pci_dev_put(dev); 643 } 644 } 645 out_put_dev: 646 pci_dev_put(port); 647 } 648 649 out_unlock: 650 pci_unlock_rescan_remove(); 651 mutex_unlock(&eeepc->hotplug_lock); 652 } 653 654 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node) 655 { 656 acpi_status status = AE_OK; 657 acpi_handle handle; 658 659 status = acpi_get_handle(NULL, node, &handle); 660 661 if (ACPI_SUCCESS(status)) 662 eeepc_rfkill_hotplug(eeepc, handle); 663 } 664 665 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 666 { 667 struct eeepc_laptop *eeepc = data; 668 669 if (event != ACPI_NOTIFY_BUS_CHECK) 670 return; 671 672 eeepc_rfkill_hotplug(eeepc, handle); 673 } 674 675 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc, 676 char *node) 677 { 678 acpi_status status; 679 acpi_handle handle; 680 681 status = acpi_get_handle(NULL, node, &handle); 682 683 if (ACPI_SUCCESS(status)) { 684 status = acpi_install_notify_handler(handle, 685 ACPI_SYSTEM_NOTIFY, 686 eeepc_rfkill_notify, 687 eeepc); 688 if (ACPI_FAILURE(status)) 689 pr_warn("Failed to register notify on %s\n", node); 690 691 /* 692 * Refresh pci hotplug in case the rfkill state was 693 * changed during setup. 694 */ 695 eeepc_rfkill_hotplug(eeepc, handle); 696 } else 697 return -ENODEV; 698 699 return 0; 700 } 701 702 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc, 703 char *node) 704 { 705 acpi_status status = AE_OK; 706 acpi_handle handle; 707 708 status = acpi_get_handle(NULL, node, &handle); 709 710 if (ACPI_SUCCESS(status)) { 711 status = acpi_remove_notify_handler(handle, 712 ACPI_SYSTEM_NOTIFY, 713 eeepc_rfkill_notify); 714 if (ACPI_FAILURE(status)) 715 pr_err("Error removing rfkill notify handler %s\n", 716 node); 717 /* 718 * Refresh pci hotplug in case the rfkill 719 * state was changed after 720 * eeepc_unregister_rfkill_notifier() 721 */ 722 eeepc_rfkill_hotplug(eeepc, handle); 723 } 724 } 725 726 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 727 u8 *value) 728 { 729 struct eeepc_laptop *eeepc = hotplug_slot->private; 730 int val = get_acpi(eeepc, CM_ASL_WLAN); 731 732 if (val == 1 || val == 0) 733 *value = val; 734 else 735 return -EINVAL; 736 737 return 0; 738 } 739 740 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 741 { 742 kfree(hotplug_slot->info); 743 kfree(hotplug_slot); 744 } 745 746 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 747 .owner = THIS_MODULE, 748 .get_adapter_status = eeepc_get_adapter_status, 749 .get_power_status = eeepc_get_adapter_status, 750 }; 751 752 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc) 753 { 754 int ret = -ENOMEM; 755 struct pci_bus *bus = pci_find_bus(0, 1); 756 757 if (!bus) { 758 pr_err("Unable to find wifi PCI bus\n"); 759 return -ENODEV; 760 } 761 762 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 763 if (!eeepc->hotplug_slot) 764 goto error_slot; 765 766 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 767 GFP_KERNEL); 768 if (!eeepc->hotplug_slot->info) 769 goto error_info; 770 771 eeepc->hotplug_slot->private = eeepc; 772 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 773 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 774 eeepc_get_adapter_status(eeepc->hotplug_slot, 775 &eeepc->hotplug_slot->info->adapter_status); 776 777 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 778 if (ret) { 779 pr_err("Unable to register hotplug slot - %d\n", ret); 780 goto error_register; 781 } 782 783 return 0; 784 785 error_register: 786 kfree(eeepc->hotplug_slot->info); 787 error_info: 788 kfree(eeepc->hotplug_slot); 789 eeepc->hotplug_slot = NULL; 790 error_slot: 791 return ret; 792 } 793 794 /* 795 * Rfkill devices 796 */ 797 static int eeepc_rfkill_set(void *data, bool blocked) 798 { 799 acpi_handle handle = data; 800 801 return write_acpi_int(handle, NULL, !blocked); 802 } 803 804 static const struct rfkill_ops eeepc_rfkill_ops = { 805 .set_block = eeepc_rfkill_set, 806 }; 807 808 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc, 809 struct rfkill **rfkill, 810 const char *name, 811 enum rfkill_type type, int cm) 812 { 813 acpi_handle handle; 814 int result; 815 816 result = acpi_setter_handle(eeepc, cm, &handle); 817 if (result < 0) 818 return result; 819 820 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 821 &eeepc_rfkill_ops, handle); 822 823 if (!*rfkill) 824 return -EINVAL; 825 826 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1); 827 result = rfkill_register(*rfkill); 828 if (result) { 829 rfkill_destroy(*rfkill); 830 *rfkill = NULL; 831 return result; 832 } 833 return 0; 834 } 835 836 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc) 837 { 838 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 839 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 840 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 841 if (eeepc->wlan_rfkill) { 842 rfkill_unregister(eeepc->wlan_rfkill); 843 rfkill_destroy(eeepc->wlan_rfkill); 844 eeepc->wlan_rfkill = NULL; 845 } 846 847 if (eeepc->hotplug_slot) 848 pci_hp_deregister(eeepc->hotplug_slot); 849 850 if (eeepc->bluetooth_rfkill) { 851 rfkill_unregister(eeepc->bluetooth_rfkill); 852 rfkill_destroy(eeepc->bluetooth_rfkill); 853 eeepc->bluetooth_rfkill = NULL; 854 } 855 if (eeepc->wwan3g_rfkill) { 856 rfkill_unregister(eeepc->wwan3g_rfkill); 857 rfkill_destroy(eeepc->wwan3g_rfkill); 858 eeepc->wwan3g_rfkill = NULL; 859 } 860 if (eeepc->wimax_rfkill) { 861 rfkill_unregister(eeepc->wimax_rfkill); 862 rfkill_destroy(eeepc->wimax_rfkill); 863 eeepc->wimax_rfkill = NULL; 864 } 865 } 866 867 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc) 868 { 869 int result = 0; 870 871 mutex_init(&eeepc->hotplug_lock); 872 873 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 874 "eeepc-wlan", RFKILL_TYPE_WLAN, 875 CM_ASL_WLAN); 876 877 if (result && result != -ENODEV) 878 goto exit; 879 880 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 881 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 882 CM_ASL_BLUETOOTH); 883 884 if (result && result != -ENODEV) 885 goto exit; 886 887 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 888 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 889 CM_ASL_3G); 890 891 if (result && result != -ENODEV) 892 goto exit; 893 894 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, 895 "eeepc-wimax", RFKILL_TYPE_WIMAX, 896 CM_ASL_WIMAX); 897 898 if (result && result != -ENODEV) 899 goto exit; 900 901 if (eeepc->hotplug_disabled) 902 return 0; 903 904 result = eeepc_setup_pci_hotplug(eeepc); 905 /* 906 * If we get -EBUSY then something else is handling the PCI hotplug - 907 * don't fail in this case 908 */ 909 if (result == -EBUSY) 910 result = 0; 911 912 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 913 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 914 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 915 916 exit: 917 if (result && result != -ENODEV) 918 eeepc_rfkill_exit(eeepc); 919 return result; 920 } 921 922 /* 923 * Platform driver - hibernate/resume callbacks 924 */ 925 static int eeepc_hotk_thaw(struct device *device) 926 { 927 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 928 929 if (eeepc->wlan_rfkill) { 930 bool wlan; 931 932 /* 933 * Work around bios bug - acpi _PTS turns off the wireless led 934 * during suspend. Normally it restores it on resume, but 935 * we should kick it ourselves in case hibernation is aborted. 936 */ 937 wlan = get_acpi(eeepc, CM_ASL_WLAN); 938 set_acpi(eeepc, CM_ASL_WLAN, wlan); 939 } 940 941 return 0; 942 } 943 944 static int eeepc_hotk_restore(struct device *device) 945 { 946 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 947 948 /* Refresh both wlan rfkill state and pci hotplug */ 949 if (eeepc->wlan_rfkill) { 950 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P5"); 951 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P6"); 952 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P7"); 953 } 954 955 if (eeepc->bluetooth_rfkill) 956 rfkill_set_sw_state(eeepc->bluetooth_rfkill, 957 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1); 958 if (eeepc->wwan3g_rfkill) 959 rfkill_set_sw_state(eeepc->wwan3g_rfkill, 960 get_acpi(eeepc, CM_ASL_3G) != 1); 961 if (eeepc->wimax_rfkill) 962 rfkill_set_sw_state(eeepc->wimax_rfkill, 963 get_acpi(eeepc, CM_ASL_WIMAX) != 1); 964 965 return 0; 966 } 967 968 static const struct dev_pm_ops eeepc_pm_ops = { 969 .thaw = eeepc_hotk_thaw, 970 .restore = eeepc_hotk_restore, 971 }; 972 973 static struct platform_driver platform_driver = { 974 .driver = { 975 .name = EEEPC_LAPTOP_FILE, 976 .owner = THIS_MODULE, 977 .pm = &eeepc_pm_ops, 978 } 979 }; 980 981 /* 982 * Hwmon device 983 */ 984 985 #define EEEPC_EC_SC00 0x61 986 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */ 987 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */ 988 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */ 989 990 #define EEEPC_EC_SFB0 0xD0 991 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */ 992 993 static int eeepc_get_fan_pwm(void) 994 { 995 u8 value = 0; 996 997 ec_read(EEEPC_EC_FAN_PWM, &value); 998 return value * 255 / 100; 999 } 1000 1001 static void eeepc_set_fan_pwm(int value) 1002 { 1003 value = clamp_val(value, 0, 255); 1004 value = value * 100 / 255; 1005 ec_write(EEEPC_EC_FAN_PWM, value); 1006 } 1007 1008 static int eeepc_get_fan_rpm(void) 1009 { 1010 u8 high = 0; 1011 u8 low = 0; 1012 1013 ec_read(EEEPC_EC_FAN_HRPM, &high); 1014 ec_read(EEEPC_EC_FAN_LRPM, &low); 1015 return high << 8 | low; 1016 } 1017 1018 static int eeepc_get_fan_ctrl(void) 1019 { 1020 u8 value = 0; 1021 1022 ec_read(EEEPC_EC_FAN_CTRL, &value); 1023 if (value & 0x02) 1024 return 1; /* manual */ 1025 else 1026 return 2; /* automatic */ 1027 } 1028 1029 static void eeepc_set_fan_ctrl(int manual) 1030 { 1031 u8 value = 0; 1032 1033 ec_read(EEEPC_EC_FAN_CTRL, &value); 1034 if (manual == 1) 1035 value |= 0x02; 1036 else 1037 value &= ~0x02; 1038 ec_write(EEEPC_EC_FAN_CTRL, value); 1039 } 1040 1041 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count) 1042 { 1043 int rv, value; 1044 1045 rv = parse_arg(buf, count, &value); 1046 if (rv > 0) 1047 set(value); 1048 return rv; 1049 } 1050 1051 static ssize_t show_sys_hwmon(int (*get)(void), char *buf) 1052 { 1053 return sprintf(buf, "%d\n", get()); 1054 } 1055 1056 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _get, _set) \ 1057 static ssize_t show_##_name(struct device *dev, \ 1058 struct device_attribute *attr, \ 1059 char *buf) \ 1060 { \ 1061 return show_sys_hwmon(_get, buf); \ 1062 } \ 1063 static ssize_t store_##_name(struct device *dev, \ 1064 struct device_attribute *attr, \ 1065 const char *buf, size_t count) \ 1066 { \ 1067 return store_sys_hwmon(_set, buf, count); \ 1068 } \ 1069 static DEVICE_ATTR(_name, _mode, show_##_name, store_##_name) 1070 1071 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL); 1072 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR, 1073 eeepc_get_fan_pwm, eeepc_set_fan_pwm); 1074 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, 1075 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl); 1076 1077 static struct attribute *hwmon_attrs[] = { 1078 &dev_attr_pwm1.attr, 1079 &dev_attr_fan1_input.attr, 1080 &dev_attr_pwm1_enable.attr, 1081 NULL 1082 }; 1083 ATTRIBUTE_GROUPS(hwmon); 1084 1085 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc) 1086 { 1087 struct device *dev = &eeepc->platform_device->dev; 1088 struct device *hwmon; 1089 1090 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL, 1091 hwmon_groups); 1092 if (IS_ERR(hwmon)) { 1093 pr_err("Could not register eeepc hwmon device\n"); 1094 return PTR_ERR(hwmon); 1095 } 1096 return 0; 1097 } 1098 1099 /* 1100 * Backlight device 1101 */ 1102 static int read_brightness(struct backlight_device *bd) 1103 { 1104 struct eeepc_laptop *eeepc = bl_get_data(bd); 1105 1106 return get_acpi(eeepc, CM_ASL_PANELBRIGHT); 1107 } 1108 1109 static int set_brightness(struct backlight_device *bd, int value) 1110 { 1111 struct eeepc_laptop *eeepc = bl_get_data(bd); 1112 1113 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value); 1114 } 1115 1116 static int update_bl_status(struct backlight_device *bd) 1117 { 1118 return set_brightness(bd, bd->props.brightness); 1119 } 1120 1121 static const struct backlight_ops eeepcbl_ops = { 1122 .get_brightness = read_brightness, 1123 .update_status = update_bl_status, 1124 }; 1125 1126 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc) 1127 { 1128 struct backlight_device *bd = eeepc->backlight_device; 1129 int old = bd->props.brightness; 1130 1131 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 1132 1133 return old; 1134 } 1135 1136 static int eeepc_backlight_init(struct eeepc_laptop *eeepc) 1137 { 1138 struct backlight_properties props; 1139 struct backlight_device *bd; 1140 1141 memset(&props, 0, sizeof(struct backlight_properties)); 1142 props.type = BACKLIGHT_PLATFORM; 1143 props.max_brightness = 15; 1144 bd = backlight_device_register(EEEPC_LAPTOP_FILE, 1145 &eeepc->platform_device->dev, eeepc, 1146 &eeepcbl_ops, &props); 1147 if (IS_ERR(bd)) { 1148 pr_err("Could not register eeepc backlight device\n"); 1149 eeepc->backlight_device = NULL; 1150 return PTR_ERR(bd); 1151 } 1152 eeepc->backlight_device = bd; 1153 bd->props.brightness = read_brightness(bd); 1154 bd->props.power = FB_BLANK_UNBLANK; 1155 backlight_update_status(bd); 1156 return 0; 1157 } 1158 1159 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc) 1160 { 1161 if (eeepc->backlight_device) 1162 backlight_device_unregister(eeepc->backlight_device); 1163 eeepc->backlight_device = NULL; 1164 } 1165 1166 1167 /* 1168 * Input device (i.e. hotkeys) 1169 */ 1170 static int eeepc_input_init(struct eeepc_laptop *eeepc) 1171 { 1172 struct input_dev *input; 1173 int error; 1174 1175 input = input_allocate_device(); 1176 if (!input) 1177 return -ENOMEM; 1178 1179 input->name = "Asus EeePC extra buttons"; 1180 input->phys = EEEPC_LAPTOP_FILE "/input0"; 1181 input->id.bustype = BUS_HOST; 1182 input->dev.parent = &eeepc->platform_device->dev; 1183 1184 error = sparse_keymap_setup(input, eeepc_keymap, NULL); 1185 if (error) { 1186 pr_err("Unable to setup input device keymap\n"); 1187 goto err_free_dev; 1188 } 1189 1190 error = input_register_device(input); 1191 if (error) { 1192 pr_err("Unable to register input device\n"); 1193 goto err_free_keymap; 1194 } 1195 1196 eeepc->inputdev = input; 1197 return 0; 1198 1199 err_free_keymap: 1200 sparse_keymap_free(input); 1201 err_free_dev: 1202 input_free_device(input); 1203 return error; 1204 } 1205 1206 static void eeepc_input_exit(struct eeepc_laptop *eeepc) 1207 { 1208 if (eeepc->inputdev) { 1209 sparse_keymap_free(eeepc->inputdev); 1210 input_unregister_device(eeepc->inputdev); 1211 } 1212 eeepc->inputdev = NULL; 1213 } 1214 1215 /* 1216 * ACPI driver 1217 */ 1218 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event) 1219 { 1220 if (!eeepc->inputdev) 1221 return ; 1222 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true)) 1223 pr_info("Unknown key %x pressed\n", event); 1224 } 1225 1226 static void eeepc_acpi_notify(struct acpi_device *device, u32 event) 1227 { 1228 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1229 u16 count; 1230 1231 if (event > ACPI_MAX_SYS_NOTIFY) 1232 return; 1233 count = eeepc->event_count[event % 128]++; 1234 acpi_bus_generate_netlink_event(device->pnp.device_class, 1235 dev_name(&device->dev), event, 1236 count); 1237 1238 /* Brightness events are special */ 1239 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) { 1240 1241 /* Ignore them completely if the acpi video driver is used */ 1242 if (eeepc->backlight_device != NULL) { 1243 int old_brightness, new_brightness; 1244 1245 /* Update the backlight device. */ 1246 old_brightness = eeepc_backlight_notify(eeepc); 1247 1248 /* Convert event to keypress (obsolescent hack) */ 1249 new_brightness = event - NOTIFY_BRN_MIN; 1250 1251 if (new_brightness < old_brightness) { 1252 event = NOTIFY_BRN_MIN; /* brightness down */ 1253 } else if (new_brightness > old_brightness) { 1254 event = NOTIFY_BRN_MAX; /* brightness up */ 1255 } else { 1256 /* 1257 * no change in brightness - already at min/max, 1258 * event will be desired value (or else ignored) 1259 */ 1260 } 1261 eeepc_input_notify(eeepc, event); 1262 } 1263 } else { 1264 /* Everything else is a bona-fide keypress event */ 1265 eeepc_input_notify(eeepc, event); 1266 } 1267 } 1268 1269 static void eeepc_dmi_check(struct eeepc_laptop *eeepc) 1270 { 1271 const char *model; 1272 1273 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1274 if (!model) 1275 return; 1276 1277 /* 1278 * Blacklist for setting cpufv (cpu speed). 1279 * 1280 * EeePC 4G ("701") implements CFVS, but it is not supported 1281 * by the pre-installed OS, and the original option to change it 1282 * in the BIOS setup screen was removed in later versions. 1283 * 1284 * Judging by the lack of "Super Hybrid Engine" on Asus product pages, 1285 * this applies to all "701" models (4G/4G Surf/2G Surf). 1286 * 1287 * So Asus made a deliberate decision not to support it on this model. 1288 * We have several reports that using it can cause the system to hang 1289 * 1290 * The hang has also been reported on a "702" (Model name "8G"?). 1291 * 1292 * We avoid dmi_check_system() / dmi_match(), because they use 1293 * substring matching. We don't want to affect the "701SD" 1294 * and "701SDX" models, because they do support S.H.E. 1295 */ 1296 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) { 1297 eeepc->cpufv_disabled = true; 1298 pr_info("model %s does not officially support setting cpu " 1299 "speed\n", model); 1300 pr_info("cpufv disabled to avoid instability\n"); 1301 } 1302 1303 /* 1304 * Blacklist for wlan hotplug 1305 * 1306 * Eeepc 1005HA doesn't work like others models and don't need the 1307 * hotplug code. In fact, current hotplug code seems to unplug another 1308 * device... 1309 */ 1310 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 || 1311 strcmp(model, "1005PE") == 0) { 1312 eeepc->hotplug_disabled = true; 1313 pr_info("wlan hotplug disabled\n"); 1314 } 1315 } 1316 1317 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name) 1318 { 1319 int dummy; 1320 1321 /* Some BIOSes do not report cm although it is available. 1322 Check if cm_getv[cm] works and, if yes, assume cm should be set. */ 1323 if (!(eeepc->cm_supported & (1 << cm)) 1324 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) { 1325 pr_info("%s (%x) not reported by BIOS," 1326 " enabling anyway\n", name, 1 << cm); 1327 eeepc->cm_supported |= 1 << cm; 1328 } 1329 } 1330 1331 static void cmsg_quirks(struct eeepc_laptop *eeepc) 1332 { 1333 cmsg_quirk(eeepc, CM_ASL_LID, "LID"); 1334 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE"); 1335 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER"); 1336 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD"); 1337 } 1338 1339 static int eeepc_acpi_init(struct eeepc_laptop *eeepc) 1340 { 1341 unsigned int init_flags; 1342 int result; 1343 1344 result = acpi_bus_get_status(eeepc->device); 1345 if (result) 1346 return result; 1347 if (!eeepc->device->status.present) { 1348 pr_err("Hotkey device not present, aborting\n"); 1349 return -ENODEV; 1350 } 1351 1352 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH; 1353 pr_notice("Hotkey init flags 0x%x\n", init_flags); 1354 1355 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) { 1356 pr_err("Hotkey initialization failed\n"); 1357 return -ENODEV; 1358 } 1359 1360 /* get control methods supported */ 1361 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) { 1362 pr_err("Get control methods supported failed\n"); 1363 return -ENODEV; 1364 } 1365 cmsg_quirks(eeepc); 1366 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported); 1367 1368 return 0; 1369 } 1370 1371 static void eeepc_enable_camera(struct eeepc_laptop *eeepc) 1372 { 1373 /* 1374 * If the following call to set_acpi() fails, it's because there's no 1375 * camera so we can ignore the error. 1376 */ 1377 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0) 1378 set_acpi(eeepc, CM_ASL_CAMERA, 1); 1379 } 1380 1381 static bool eeepc_device_present; 1382 1383 static int eeepc_acpi_add(struct acpi_device *device) 1384 { 1385 struct eeepc_laptop *eeepc; 1386 int result; 1387 1388 pr_notice(EEEPC_LAPTOP_NAME "\n"); 1389 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL); 1390 if (!eeepc) 1391 return -ENOMEM; 1392 eeepc->handle = device->handle; 1393 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME); 1394 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS); 1395 device->driver_data = eeepc; 1396 eeepc->device = device; 1397 1398 eeepc->hotplug_disabled = hotplug_disabled; 1399 1400 eeepc_dmi_check(eeepc); 1401 1402 result = eeepc_acpi_init(eeepc); 1403 if (result) 1404 goto fail_platform; 1405 eeepc_enable_camera(eeepc); 1406 1407 /* 1408 * Register the platform device first. It is used as a parent for the 1409 * sub-devices below. 1410 * 1411 * Note that if there are multiple instances of this ACPI device it 1412 * will bail out, because the platform device is registered with a 1413 * fixed name. Of course it doesn't make sense to have more than one, 1414 * and machine-specific scripts find the fixed name convenient. But 1415 * It's also good for us to exclude multiple instances because both 1416 * our hwmon and our wlan rfkill subdevice use global ACPI objects 1417 * (the EC and the wlan PCI slot respectively). 1418 */ 1419 result = eeepc_platform_init(eeepc); 1420 if (result) 1421 goto fail_platform; 1422 1423 if (!acpi_video_backlight_support()) { 1424 result = eeepc_backlight_init(eeepc); 1425 if (result) 1426 goto fail_backlight; 1427 } else 1428 pr_info("Backlight controlled by ACPI video driver\n"); 1429 1430 result = eeepc_input_init(eeepc); 1431 if (result) 1432 goto fail_input; 1433 1434 result = eeepc_hwmon_init(eeepc); 1435 if (result) 1436 goto fail_hwmon; 1437 1438 result = eeepc_led_init(eeepc); 1439 if (result) 1440 goto fail_led; 1441 1442 result = eeepc_rfkill_init(eeepc); 1443 if (result) 1444 goto fail_rfkill; 1445 1446 eeepc_device_present = true; 1447 return 0; 1448 1449 fail_rfkill: 1450 eeepc_led_exit(eeepc); 1451 fail_led: 1452 fail_hwmon: 1453 eeepc_input_exit(eeepc); 1454 fail_input: 1455 eeepc_backlight_exit(eeepc); 1456 fail_backlight: 1457 eeepc_platform_exit(eeepc); 1458 fail_platform: 1459 kfree(eeepc); 1460 1461 return result; 1462 } 1463 1464 static int eeepc_acpi_remove(struct acpi_device *device) 1465 { 1466 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1467 1468 eeepc_backlight_exit(eeepc); 1469 eeepc_rfkill_exit(eeepc); 1470 eeepc_input_exit(eeepc); 1471 eeepc_led_exit(eeepc); 1472 eeepc_platform_exit(eeepc); 1473 1474 kfree(eeepc); 1475 return 0; 1476 } 1477 1478 1479 static const struct acpi_device_id eeepc_device_ids[] = { 1480 {EEEPC_ACPI_HID, 0}, 1481 {"", 0}, 1482 }; 1483 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids); 1484 1485 static struct acpi_driver eeepc_acpi_driver = { 1486 .name = EEEPC_LAPTOP_NAME, 1487 .class = EEEPC_ACPI_CLASS, 1488 .owner = THIS_MODULE, 1489 .ids = eeepc_device_ids, 1490 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 1491 .ops = { 1492 .add = eeepc_acpi_add, 1493 .remove = eeepc_acpi_remove, 1494 .notify = eeepc_acpi_notify, 1495 }, 1496 }; 1497 1498 1499 static int __init eeepc_laptop_init(void) 1500 { 1501 int result; 1502 1503 result = platform_driver_register(&platform_driver); 1504 if (result < 0) 1505 return result; 1506 1507 result = acpi_bus_register_driver(&eeepc_acpi_driver); 1508 if (result < 0) 1509 goto fail_acpi_driver; 1510 1511 if (!eeepc_device_present) { 1512 result = -ENODEV; 1513 goto fail_no_device; 1514 } 1515 1516 return 0; 1517 1518 fail_no_device: 1519 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1520 fail_acpi_driver: 1521 platform_driver_unregister(&platform_driver); 1522 return result; 1523 } 1524 1525 static void __exit eeepc_laptop_exit(void) 1526 { 1527 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1528 platform_driver_unregister(&platform_driver); 1529 } 1530 1531 module_init(eeepc_laptop_init); 1532 module_exit(eeepc_laptop_exit); 1533