1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * eeepc-laptop.c - Asus Eee PC extras 4 * 5 * Based on asus_acpi.c as patched for the Eee PC by Asus: 6 * ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar 7 * Based on eee.c from eeepc-linux 8 */ 9 10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 11 12 #include <linux/kernel.h> 13 #include <linux/module.h> 14 #include <linux/init.h> 15 #include <linux/types.h> 16 #include <linux/platform_device.h> 17 #include <linux/backlight.h> 18 #include <linux/fb.h> 19 #include <linux/hwmon.h> 20 #include <linux/hwmon-sysfs.h> 21 #include <linux/slab.h> 22 #include <linux/acpi.h> 23 #include <linux/uaccess.h> 24 #include <linux/input.h> 25 #include <linux/input/sparse-keymap.h> 26 #include <linux/rfkill.h> 27 #include <linux/pci.h> 28 #include <linux/pci_hotplug.h> 29 #include <linux/leds.h> 30 #include <linux/dmi.h> 31 #include <acpi/video.h> 32 33 #define EEEPC_LAPTOP_VERSION "0.1" 34 #define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver" 35 #define EEEPC_LAPTOP_FILE "eeepc" 36 37 #define EEEPC_ACPI_CLASS "hotkey" 38 #define EEEPC_ACPI_DEVICE_NAME "Hotkey" 39 #define EEEPC_ACPI_HID "ASUS010" 40 41 MODULE_AUTHOR("Corentin Chary, Eric Cooper"); 42 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME); 43 MODULE_LICENSE("GPL"); 44 45 static bool hotplug_disabled; 46 47 module_param(hotplug_disabled, bool, 0444); 48 MODULE_PARM_DESC(hotplug_disabled, 49 "Disable hotplug for wireless device. " 50 "If your laptop need that, please report to " 51 "acpi4asus-user@lists.sourceforge.net."); 52 53 /* 54 * Definitions for Asus EeePC 55 */ 56 #define NOTIFY_BRN_MIN 0x20 57 #define NOTIFY_BRN_MAX 0x2f 58 59 enum { 60 DISABLE_ASL_WLAN = 0x0001, 61 DISABLE_ASL_BLUETOOTH = 0x0002, 62 DISABLE_ASL_IRDA = 0x0004, 63 DISABLE_ASL_CAMERA = 0x0008, 64 DISABLE_ASL_TV = 0x0010, 65 DISABLE_ASL_GPS = 0x0020, 66 DISABLE_ASL_DISPLAYSWITCH = 0x0040, 67 DISABLE_ASL_MODEM = 0x0080, 68 DISABLE_ASL_CARDREADER = 0x0100, 69 DISABLE_ASL_3G = 0x0200, 70 DISABLE_ASL_WIMAX = 0x0400, 71 DISABLE_ASL_HWCF = 0x0800 72 }; 73 74 enum { 75 CM_ASL_WLAN = 0, 76 CM_ASL_BLUETOOTH, 77 CM_ASL_IRDA, 78 CM_ASL_1394, 79 CM_ASL_CAMERA, 80 CM_ASL_TV, 81 CM_ASL_GPS, 82 CM_ASL_DVDROM, 83 CM_ASL_DISPLAYSWITCH, 84 CM_ASL_PANELBRIGHT, 85 CM_ASL_BIOSFLASH, 86 CM_ASL_ACPIFLASH, 87 CM_ASL_CPUFV, 88 CM_ASL_CPUTEMPERATURE, 89 CM_ASL_FANCPU, 90 CM_ASL_FANCHASSIS, 91 CM_ASL_USBPORT1, 92 CM_ASL_USBPORT2, 93 CM_ASL_USBPORT3, 94 CM_ASL_MODEM, 95 CM_ASL_CARDREADER, 96 CM_ASL_3G, 97 CM_ASL_WIMAX, 98 CM_ASL_HWCF, 99 CM_ASL_LID, 100 CM_ASL_TYPE, 101 CM_ASL_PANELPOWER, /*P901*/ 102 CM_ASL_TPD 103 }; 104 105 static const char *cm_getv[] = { 106 "WLDG", "BTHG", NULL, NULL, 107 "CAMG", NULL, NULL, NULL, 108 NULL, "PBLG", NULL, NULL, 109 "CFVG", NULL, NULL, NULL, 110 "USBG", NULL, NULL, "MODG", 111 "CRDG", "M3GG", "WIMG", "HWCF", 112 "LIDG", "TYPE", "PBPG", "TPDG" 113 }; 114 115 static const char *cm_setv[] = { 116 "WLDS", "BTHS", NULL, NULL, 117 "CAMS", NULL, NULL, NULL, 118 "SDSP", "PBLS", "HDPS", NULL, 119 "CFVS", NULL, NULL, NULL, 120 "USBG", NULL, NULL, "MODS", 121 "CRDS", "M3GS", "WIMS", NULL, 122 NULL, NULL, "PBPS", "TPDS" 123 }; 124 125 static const struct key_entry eeepc_keymap[] = { 126 { KE_KEY, 0x10, { KEY_WLAN } }, 127 { KE_KEY, 0x11, { KEY_WLAN } }, 128 { KE_KEY, 0x12, { KEY_PROG1 } }, 129 { KE_KEY, 0x13, { KEY_MUTE } }, 130 { KE_KEY, 0x14, { KEY_VOLUMEDOWN } }, 131 { KE_KEY, 0x15, { KEY_VOLUMEUP } }, 132 { KE_KEY, 0x16, { KEY_DISPLAY_OFF } }, 133 { KE_KEY, 0x1a, { KEY_COFFEE } }, 134 { KE_KEY, 0x1b, { KEY_ZOOM } }, 135 { KE_KEY, 0x1c, { KEY_PROG2 } }, 136 { KE_KEY, 0x1d, { KEY_PROG3 } }, 137 { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } }, 138 { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } }, 139 { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } }, 140 { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } }, 141 { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } }, 142 { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */ 143 { KE_KEY, 0x38, { KEY_F14 } }, 144 { KE_IGNORE, 0x50, { KEY_RESERVED } }, /* AC plugged */ 145 { KE_IGNORE, 0x51, { KEY_RESERVED } }, /* AC unplugged */ 146 { KE_END, 0 }, 147 }; 148 149 /* 150 * This is the main structure, we can use it to store useful information 151 */ 152 struct eeepc_laptop { 153 acpi_handle handle; /* the handle of the acpi device */ 154 u32 cm_supported; /* the control methods supported 155 by this BIOS */ 156 bool cpufv_disabled; 157 bool hotplug_disabled; 158 u16 event_count[128]; /* count for each event */ 159 160 struct platform_device *platform_device; 161 struct acpi_device *device; /* the device we are in */ 162 struct backlight_device *backlight_device; 163 164 struct input_dev *inputdev; 165 166 struct rfkill *wlan_rfkill; 167 struct rfkill *bluetooth_rfkill; 168 struct rfkill *wwan3g_rfkill; 169 struct rfkill *wimax_rfkill; 170 171 struct hotplug_slot hotplug_slot; 172 struct mutex hotplug_lock; 173 174 struct led_classdev tpd_led; 175 int tpd_led_wk; 176 struct workqueue_struct *led_workqueue; 177 struct work_struct tpd_led_work; 178 }; 179 180 /* 181 * ACPI Helpers 182 */ 183 static int write_acpi_int(acpi_handle handle, const char *method, int val) 184 { 185 acpi_status status; 186 187 status = acpi_execute_simple_method(handle, (char *)method, val); 188 189 return (status == AE_OK ? 0 : -1); 190 } 191 192 static int read_acpi_int(acpi_handle handle, const char *method, int *val) 193 { 194 acpi_status status; 195 unsigned long long result; 196 197 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result); 198 if (ACPI_FAILURE(status)) { 199 *val = -1; 200 return -1; 201 } else { 202 *val = result; 203 return 0; 204 } 205 } 206 207 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value) 208 { 209 const char *method = cm_setv[cm]; 210 211 if (method == NULL) 212 return -ENODEV; 213 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 214 return -ENODEV; 215 216 if (write_acpi_int(eeepc->handle, method, value)) 217 pr_warn("Error writing %s\n", method); 218 return 0; 219 } 220 221 static int get_acpi(struct eeepc_laptop *eeepc, int cm) 222 { 223 const char *method = cm_getv[cm]; 224 int value; 225 226 if (method == NULL) 227 return -ENODEV; 228 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 229 return -ENODEV; 230 231 if (read_acpi_int(eeepc->handle, method, &value)) 232 pr_warn("Error reading %s\n", method); 233 return value; 234 } 235 236 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm, 237 acpi_handle *handle) 238 { 239 const char *method = cm_setv[cm]; 240 acpi_status status; 241 242 if (method == NULL) 243 return -ENODEV; 244 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 245 return -ENODEV; 246 247 status = acpi_get_handle(eeepc->handle, (char *)method, 248 handle); 249 if (status != AE_OK) { 250 pr_warn("Error finding %s\n", method); 251 return -ENODEV; 252 } 253 return 0; 254 } 255 256 257 /* 258 * Sys helpers 259 */ 260 static int parse_arg(const char *buf, int *val) 261 { 262 if (sscanf(buf, "%i", val) != 1) 263 return -EINVAL; 264 return 0; 265 } 266 267 static ssize_t store_sys_acpi(struct device *dev, int cm, 268 const char *buf, size_t count) 269 { 270 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 271 int rv, value; 272 273 rv = parse_arg(buf, &value); 274 if (rv < 0) 275 return rv; 276 rv = set_acpi(eeepc, cm, value); 277 if (rv < 0) 278 return -EIO; 279 return count; 280 } 281 282 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf) 283 { 284 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 285 int value = get_acpi(eeepc, cm); 286 287 if (value < 0) 288 return -EIO; 289 return sprintf(buf, "%d\n", value); 290 } 291 292 #define EEEPC_ACPI_SHOW_FUNC(_name, _cm) \ 293 static ssize_t _name##_show(struct device *dev, \ 294 struct device_attribute *attr, \ 295 char *buf) \ 296 { \ 297 return show_sys_acpi(dev, _cm, buf); \ 298 } 299 300 #define EEEPC_ACPI_STORE_FUNC(_name, _cm) \ 301 static ssize_t _name##_store(struct device *dev, \ 302 struct device_attribute *attr, \ 303 const char *buf, size_t count) \ 304 { \ 305 return store_sys_acpi(dev, _cm, buf, count); \ 306 } 307 308 #define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm) \ 309 EEEPC_ACPI_SHOW_FUNC(_name, _cm) \ 310 EEEPC_ACPI_STORE_FUNC(_name, _cm) \ 311 static DEVICE_ATTR_RW(_name) 312 313 #define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm) \ 314 EEEPC_ACPI_STORE_FUNC(_name, _cm) \ 315 static DEVICE_ATTR_WO(_name) 316 317 EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA); 318 EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER); 319 EEEPC_CREATE_DEVICE_ATTR_WO(disp, CM_ASL_DISPLAYSWITCH); 320 321 struct eeepc_cpufv { 322 int num; 323 int cur; 324 }; 325 326 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c) 327 { 328 c->cur = get_acpi(eeepc, CM_ASL_CPUFV); 329 if (c->cur < 0) 330 return -ENODEV; 331 332 c->num = (c->cur >> 8) & 0xff; 333 c->cur &= 0xff; 334 if (c->num == 0 || c->num > 12) 335 return -ENODEV; 336 return 0; 337 } 338 339 static ssize_t available_cpufv_show(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 cpufv_show(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 cpufv_store(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, &value); 381 if (rv < 0) 382 return rv; 383 if (value < 0 || value >= c.num) 384 return -EINVAL; 385 rv = set_acpi(eeepc, CM_ASL_CPUFV, value); 386 if (rv) 387 return rv; 388 return count; 389 } 390 391 static ssize_t cpufv_disabled_show(struct device *dev, 392 struct device_attribute *attr, 393 char *buf) 394 { 395 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 396 397 return sprintf(buf, "%d\n", eeepc->cpufv_disabled); 398 } 399 400 static ssize_t cpufv_disabled_store(struct device *dev, 401 struct device_attribute *attr, 402 const char *buf, size_t count) 403 { 404 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 405 int rv, value; 406 407 rv = parse_arg(buf, &value); 408 if (rv < 0) 409 return rv; 410 411 switch (value) { 412 case 0: 413 if (eeepc->cpufv_disabled) 414 pr_warn("cpufv enabled (not officially supported on this model)\n"); 415 eeepc->cpufv_disabled = false; 416 return count; 417 case 1: 418 return -EPERM; 419 default: 420 return -EINVAL; 421 } 422 } 423 424 425 static DEVICE_ATTR_RW(cpufv); 426 static DEVICE_ATTR_RO(available_cpufv); 427 static DEVICE_ATTR_RW(cpufv_disabled); 428 429 static struct attribute *platform_attributes[] = { 430 &dev_attr_camera.attr, 431 &dev_attr_cardr.attr, 432 &dev_attr_disp.attr, 433 &dev_attr_cpufv.attr, 434 &dev_attr_available_cpufv.attr, 435 &dev_attr_cpufv_disabled.attr, 436 NULL 437 }; 438 439 static const struct attribute_group platform_attribute_group = { 440 .attrs = platform_attributes 441 }; 442 443 static int eeepc_platform_init(struct eeepc_laptop *eeepc) 444 { 445 int result; 446 447 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, PLATFORM_DEVID_NONE); 448 if (!eeepc->platform_device) 449 return -ENOMEM; 450 platform_set_drvdata(eeepc->platform_device, eeepc); 451 452 result = platform_device_add(eeepc->platform_device); 453 if (result) 454 goto fail_platform_device; 455 456 result = sysfs_create_group(&eeepc->platform_device->dev.kobj, 457 &platform_attribute_group); 458 if (result) 459 goto fail_sysfs; 460 return 0; 461 462 fail_sysfs: 463 platform_device_del(eeepc->platform_device); 464 fail_platform_device: 465 platform_device_put(eeepc->platform_device); 466 return result; 467 } 468 469 static void eeepc_platform_exit(struct eeepc_laptop *eeepc) 470 { 471 sysfs_remove_group(&eeepc->platform_device->dev.kobj, 472 &platform_attribute_group); 473 platform_device_unregister(eeepc->platform_device); 474 } 475 476 /* 477 * LEDs 478 */ 479 /* 480 * These functions actually update the LED's, and are called from a 481 * workqueue. By doing this as separate work rather than when the LED 482 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 483 * potentially bad time, such as a timer interrupt. 484 */ 485 static void tpd_led_update(struct work_struct *work) 486 { 487 struct eeepc_laptop *eeepc; 488 489 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work); 490 491 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk); 492 } 493 494 static void tpd_led_set(struct led_classdev *led_cdev, 495 enum led_brightness value) 496 { 497 struct eeepc_laptop *eeepc; 498 499 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 500 501 eeepc->tpd_led_wk = (value > 0) ? 1 : 0; 502 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 503 } 504 505 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 506 { 507 struct eeepc_laptop *eeepc; 508 509 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 510 511 return get_acpi(eeepc, CM_ASL_TPD); 512 } 513 514 static int eeepc_led_init(struct eeepc_laptop *eeepc) 515 { 516 int rv; 517 518 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV) 519 return 0; 520 521 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 522 if (!eeepc->led_workqueue) 523 return -ENOMEM; 524 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 525 526 eeepc->tpd_led.name = "eeepc::touchpad"; 527 eeepc->tpd_led.brightness_set = tpd_led_set; 528 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */ 529 eeepc->tpd_led.brightness_get = tpd_led_get; 530 eeepc->tpd_led.max_brightness = 1; 531 532 rv = led_classdev_register(&eeepc->platform_device->dev, 533 &eeepc->tpd_led); 534 if (rv) { 535 destroy_workqueue(eeepc->led_workqueue); 536 return rv; 537 } 538 539 return 0; 540 } 541 542 static void eeepc_led_exit(struct eeepc_laptop *eeepc) 543 { 544 led_classdev_unregister(&eeepc->tpd_led); 545 if (eeepc->led_workqueue) 546 destroy_workqueue(eeepc->led_workqueue); 547 } 548 549 /* 550 * PCI hotplug (for wlan rfkill) 551 */ 552 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc) 553 { 554 if (get_acpi(eeepc, CM_ASL_WLAN) == 1) 555 return false; 556 return true; 557 } 558 559 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle) 560 { 561 struct pci_dev *port; 562 struct pci_dev *dev; 563 struct pci_bus *bus; 564 bool blocked = eeepc_wlan_rfkill_blocked(eeepc); 565 bool absent; 566 u32 l; 567 568 if (eeepc->wlan_rfkill) 569 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 570 571 mutex_lock(&eeepc->hotplug_lock); 572 pci_lock_rescan_remove(); 573 574 if (!eeepc->hotplug_slot.ops) 575 goto out_unlock; 576 577 port = acpi_get_pci_dev(handle); 578 if (!port) { 579 pr_warn("Unable to find port\n"); 580 goto out_unlock; 581 } 582 583 bus = port->subordinate; 584 585 if (!bus) { 586 pr_warn("Unable to find PCI bus 1?\n"); 587 goto out_put_dev; 588 } 589 590 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 591 pr_err("Unable to read PCI config space?\n"); 592 goto out_put_dev; 593 } 594 595 absent = (l == 0xffffffff); 596 597 if (blocked != absent) { 598 pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n", 599 blocked ? "blocked" : "unblocked", 600 absent ? "absent" : "present"); 601 pr_warn("skipped wireless hotplug as probably inappropriate for this model\n"); 602 goto out_put_dev; 603 } 604 605 if (!blocked) { 606 dev = pci_get_slot(bus, 0); 607 if (dev) { 608 /* Device already present */ 609 pci_dev_put(dev); 610 goto out_put_dev; 611 } 612 dev = pci_scan_single_device(bus, 0); 613 if (dev) { 614 pci_bus_assign_resources(bus); 615 pci_bus_add_device(dev); 616 } 617 } else { 618 dev = pci_get_slot(bus, 0); 619 if (dev) { 620 pci_stop_and_remove_bus_device(dev); 621 pci_dev_put(dev); 622 } 623 } 624 out_put_dev: 625 pci_dev_put(port); 626 627 out_unlock: 628 pci_unlock_rescan_remove(); 629 mutex_unlock(&eeepc->hotplug_lock); 630 } 631 632 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node) 633 { 634 acpi_status status = AE_OK; 635 acpi_handle handle; 636 637 status = acpi_get_handle(NULL, node, &handle); 638 639 if (ACPI_SUCCESS(status)) 640 eeepc_rfkill_hotplug(eeepc, handle); 641 } 642 643 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 644 { 645 struct eeepc_laptop *eeepc = data; 646 647 if (event != ACPI_NOTIFY_BUS_CHECK) 648 return; 649 650 eeepc_rfkill_hotplug(eeepc, handle); 651 } 652 653 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc, 654 char *node) 655 { 656 acpi_status status; 657 acpi_handle handle; 658 659 status = acpi_get_handle(NULL, node, &handle); 660 661 if (ACPI_FAILURE(status)) 662 return -ENODEV; 663 664 status = acpi_install_notify_handler(handle, 665 ACPI_SYSTEM_NOTIFY, 666 eeepc_rfkill_notify, 667 eeepc); 668 if (ACPI_FAILURE(status)) 669 pr_warn("Failed to register notify on %s\n", node); 670 671 /* 672 * Refresh pci hotplug in case the rfkill state was 673 * changed during setup. 674 */ 675 eeepc_rfkill_hotplug(eeepc, handle); 676 return 0; 677 } 678 679 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc, 680 char *node) 681 { 682 acpi_status status = AE_OK; 683 acpi_handle handle; 684 685 status = acpi_get_handle(NULL, node, &handle); 686 687 if (ACPI_FAILURE(status)) 688 return; 689 690 status = acpi_remove_notify_handler(handle, 691 ACPI_SYSTEM_NOTIFY, 692 eeepc_rfkill_notify); 693 if (ACPI_FAILURE(status)) 694 pr_err("Error removing rfkill notify handler %s\n", 695 node); 696 /* 697 * Refresh pci hotplug in case the rfkill 698 * state was changed after 699 * eeepc_unregister_rfkill_notifier() 700 */ 701 eeepc_rfkill_hotplug(eeepc, handle); 702 } 703 704 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 705 u8 *value) 706 { 707 struct eeepc_laptop *eeepc; 708 int val; 709 710 eeepc = container_of(hotplug_slot, struct eeepc_laptop, hotplug_slot); 711 val = get_acpi(eeepc, CM_ASL_WLAN); 712 713 if (val == 1 || val == 0) 714 *value = val; 715 else 716 return -EINVAL; 717 718 return 0; 719 } 720 721 static const struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 722 .get_adapter_status = eeepc_get_adapter_status, 723 .get_power_status = eeepc_get_adapter_status, 724 }; 725 726 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc) 727 { 728 int ret = -ENOMEM; 729 struct pci_bus *bus = pci_find_bus(0, 1); 730 731 if (!bus) { 732 pr_err("Unable to find wifi PCI bus\n"); 733 return -ENODEV; 734 } 735 736 eeepc->hotplug_slot.ops = &eeepc_hotplug_slot_ops; 737 738 ret = pci_hp_register(&eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 739 if (ret) { 740 pr_err("Unable to register hotplug slot - %d\n", ret); 741 goto error_register; 742 } 743 744 return 0; 745 746 error_register: 747 eeepc->hotplug_slot.ops = NULL; 748 return ret; 749 } 750 751 /* 752 * Rfkill devices 753 */ 754 static int eeepc_rfkill_set(void *data, bool blocked) 755 { 756 acpi_handle handle = data; 757 758 return write_acpi_int(handle, NULL, !blocked); 759 } 760 761 static const struct rfkill_ops eeepc_rfkill_ops = { 762 .set_block = eeepc_rfkill_set, 763 }; 764 765 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc, 766 struct rfkill **rfkill, 767 const char *name, 768 enum rfkill_type type, int cm) 769 { 770 acpi_handle handle; 771 int result; 772 773 result = acpi_setter_handle(eeepc, cm, &handle); 774 if (result < 0) 775 return result; 776 777 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 778 &eeepc_rfkill_ops, handle); 779 780 if (!*rfkill) 781 return -EINVAL; 782 783 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1); 784 result = rfkill_register(*rfkill); 785 if (result) { 786 rfkill_destroy(*rfkill); 787 *rfkill = NULL; 788 return result; 789 } 790 return 0; 791 } 792 793 static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5"; 794 static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6"; 795 static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7"; 796 797 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc) 798 { 799 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1); 800 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2); 801 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3); 802 if (eeepc->wlan_rfkill) { 803 rfkill_unregister(eeepc->wlan_rfkill); 804 rfkill_destroy(eeepc->wlan_rfkill); 805 eeepc->wlan_rfkill = NULL; 806 } 807 808 if (eeepc->hotplug_slot.ops) 809 pci_hp_deregister(&eeepc->hotplug_slot); 810 811 if (eeepc->bluetooth_rfkill) { 812 rfkill_unregister(eeepc->bluetooth_rfkill); 813 rfkill_destroy(eeepc->bluetooth_rfkill); 814 eeepc->bluetooth_rfkill = NULL; 815 } 816 if (eeepc->wwan3g_rfkill) { 817 rfkill_unregister(eeepc->wwan3g_rfkill); 818 rfkill_destroy(eeepc->wwan3g_rfkill); 819 eeepc->wwan3g_rfkill = NULL; 820 } 821 if (eeepc->wimax_rfkill) { 822 rfkill_unregister(eeepc->wimax_rfkill); 823 rfkill_destroy(eeepc->wimax_rfkill); 824 eeepc->wimax_rfkill = NULL; 825 } 826 } 827 828 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc) 829 { 830 int result = 0; 831 832 mutex_init(&eeepc->hotplug_lock); 833 834 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 835 "eeepc-wlan", RFKILL_TYPE_WLAN, 836 CM_ASL_WLAN); 837 838 if (result && result != -ENODEV) 839 goto exit; 840 841 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 842 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 843 CM_ASL_BLUETOOTH); 844 845 if (result && result != -ENODEV) 846 goto exit; 847 848 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 849 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 850 CM_ASL_3G); 851 852 if (result && result != -ENODEV) 853 goto exit; 854 855 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, 856 "eeepc-wimax", RFKILL_TYPE_WIMAX, 857 CM_ASL_WIMAX); 858 859 if (result && result != -ENODEV) 860 goto exit; 861 862 if (eeepc->hotplug_disabled) 863 return 0; 864 865 result = eeepc_setup_pci_hotplug(eeepc); 866 /* 867 * If we get -EBUSY then something else is handling the PCI hotplug - 868 * don't fail in this case 869 */ 870 if (result == -EBUSY) 871 result = 0; 872 873 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1); 874 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2); 875 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3); 876 877 exit: 878 if (result && result != -ENODEV) 879 eeepc_rfkill_exit(eeepc); 880 return result; 881 } 882 883 /* 884 * Platform driver - hibernate/resume callbacks 885 */ 886 static int eeepc_hotk_thaw(struct device *device) 887 { 888 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 889 890 if (eeepc->wlan_rfkill) { 891 int wlan; 892 893 /* 894 * Work around bios bug - acpi _PTS turns off the wireless led 895 * during suspend. Normally it restores it on resume, but 896 * we should kick it ourselves in case hibernation is aborted. 897 */ 898 wlan = get_acpi(eeepc, CM_ASL_WLAN); 899 if (wlan >= 0) 900 set_acpi(eeepc, CM_ASL_WLAN, wlan); 901 } 902 903 return 0; 904 } 905 906 static int eeepc_hotk_restore(struct device *device) 907 { 908 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 909 910 /* Refresh both wlan rfkill state and pci hotplug */ 911 if (eeepc->wlan_rfkill) { 912 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1); 913 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2); 914 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3); 915 } 916 917 if (eeepc->bluetooth_rfkill) 918 rfkill_set_sw_state(eeepc->bluetooth_rfkill, 919 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1); 920 if (eeepc->wwan3g_rfkill) 921 rfkill_set_sw_state(eeepc->wwan3g_rfkill, 922 get_acpi(eeepc, CM_ASL_3G) != 1); 923 if (eeepc->wimax_rfkill) 924 rfkill_set_sw_state(eeepc->wimax_rfkill, 925 get_acpi(eeepc, CM_ASL_WIMAX) != 1); 926 927 return 0; 928 } 929 930 static const struct dev_pm_ops eeepc_pm_ops = { 931 .thaw = eeepc_hotk_thaw, 932 .restore = eeepc_hotk_restore, 933 }; 934 935 static struct platform_driver platform_driver = { 936 .driver = { 937 .name = EEEPC_LAPTOP_FILE, 938 .pm = &eeepc_pm_ops, 939 } 940 }; 941 942 /* 943 * Hwmon device 944 */ 945 946 #define EEEPC_EC_SC00 0x61 947 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */ 948 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */ 949 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */ 950 951 #define EEEPC_EC_SFB0 0xD0 952 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */ 953 954 static inline int eeepc_pwm_to_lmsensors(int value) 955 { 956 return value * 255 / 100; 957 } 958 959 static inline int eeepc_lmsensors_to_pwm(int value) 960 { 961 value = clamp_val(value, 0, 255); 962 return value * 100 / 255; 963 } 964 965 static int eeepc_get_fan_pwm(void) 966 { 967 u8 value = 0; 968 969 ec_read(EEEPC_EC_FAN_PWM, &value); 970 return eeepc_pwm_to_lmsensors(value); 971 } 972 973 static void eeepc_set_fan_pwm(int value) 974 { 975 value = eeepc_lmsensors_to_pwm(value); 976 ec_write(EEEPC_EC_FAN_PWM, value); 977 } 978 979 static int eeepc_get_fan_rpm(void) 980 { 981 u8 high = 0; 982 u8 low = 0; 983 984 ec_read(EEEPC_EC_FAN_HRPM, &high); 985 ec_read(EEEPC_EC_FAN_LRPM, &low); 986 return high << 8 | low; 987 } 988 989 #define EEEPC_EC_FAN_CTRL_BIT 0x02 990 #define EEEPC_FAN_CTRL_MANUAL 1 991 #define EEEPC_FAN_CTRL_AUTO 2 992 993 static int eeepc_get_fan_ctrl(void) 994 { 995 u8 value = 0; 996 997 ec_read(EEEPC_EC_FAN_CTRL, &value); 998 if (value & EEEPC_EC_FAN_CTRL_BIT) 999 return EEEPC_FAN_CTRL_MANUAL; 1000 else 1001 return EEEPC_FAN_CTRL_AUTO; 1002 } 1003 1004 static void eeepc_set_fan_ctrl(int manual) 1005 { 1006 u8 value = 0; 1007 1008 ec_read(EEEPC_EC_FAN_CTRL, &value); 1009 if (manual == EEEPC_FAN_CTRL_MANUAL) 1010 value |= EEEPC_EC_FAN_CTRL_BIT; 1011 else 1012 value &= ~EEEPC_EC_FAN_CTRL_BIT; 1013 ec_write(EEEPC_EC_FAN_CTRL, value); 1014 } 1015 1016 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count) 1017 { 1018 int rv, value; 1019 1020 rv = parse_arg(buf, &value); 1021 if (rv < 0) 1022 return rv; 1023 set(value); 1024 return count; 1025 } 1026 1027 static ssize_t show_sys_hwmon(int (*get)(void), char *buf) 1028 { 1029 return sprintf(buf, "%d\n", get()); 1030 } 1031 1032 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \ 1033 static ssize_t _name##_show(struct device *dev, \ 1034 struct device_attribute *attr, \ 1035 char *buf) \ 1036 { \ 1037 return show_sys_hwmon(_get, buf); \ 1038 } 1039 1040 #define EEEPC_SENSOR_STORE_FUNC(_name, _set) \ 1041 static ssize_t _name##_store(struct device *dev, \ 1042 struct device_attribute *attr, \ 1043 const char *buf, size_t count) \ 1044 { \ 1045 return store_sys_hwmon(_set, buf, count); \ 1046 } 1047 1048 #define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \ 1049 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \ 1050 EEEPC_SENSOR_STORE_FUNC(_name, _set) \ 1051 static DEVICE_ATTR_RW(_name) 1052 1053 #define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \ 1054 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \ 1055 static DEVICE_ATTR_RO(_name) 1056 1057 EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm); 1058 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm, 1059 eeepc_set_fan_pwm); 1060 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl, 1061 eeepc_set_fan_ctrl); 1062 1063 static struct attribute *hwmon_attrs[] = { 1064 &dev_attr_pwm1.attr, 1065 &dev_attr_fan1_input.attr, 1066 &dev_attr_pwm1_enable.attr, 1067 NULL 1068 }; 1069 ATTRIBUTE_GROUPS(hwmon); 1070 1071 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc) 1072 { 1073 struct device *dev = &eeepc->platform_device->dev; 1074 struct device *hwmon; 1075 1076 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL, 1077 hwmon_groups); 1078 if (IS_ERR(hwmon)) { 1079 pr_err("Could not register eeepc hwmon device\n"); 1080 return PTR_ERR(hwmon); 1081 } 1082 return 0; 1083 } 1084 1085 /* 1086 * Backlight device 1087 */ 1088 static int read_brightness(struct backlight_device *bd) 1089 { 1090 struct eeepc_laptop *eeepc = bl_get_data(bd); 1091 1092 return get_acpi(eeepc, CM_ASL_PANELBRIGHT); 1093 } 1094 1095 static int set_brightness(struct backlight_device *bd, int value) 1096 { 1097 struct eeepc_laptop *eeepc = bl_get_data(bd); 1098 1099 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value); 1100 } 1101 1102 static int update_bl_status(struct backlight_device *bd) 1103 { 1104 return set_brightness(bd, bd->props.brightness); 1105 } 1106 1107 static const struct backlight_ops eeepcbl_ops = { 1108 .get_brightness = read_brightness, 1109 .update_status = update_bl_status, 1110 }; 1111 1112 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc) 1113 { 1114 struct backlight_device *bd = eeepc->backlight_device; 1115 int old = bd->props.brightness; 1116 1117 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 1118 1119 return old; 1120 } 1121 1122 static int eeepc_backlight_init(struct eeepc_laptop *eeepc) 1123 { 1124 struct backlight_properties props; 1125 struct backlight_device *bd; 1126 1127 memset(&props, 0, sizeof(struct backlight_properties)); 1128 props.type = BACKLIGHT_PLATFORM; 1129 props.max_brightness = 15; 1130 bd = backlight_device_register(EEEPC_LAPTOP_FILE, 1131 &eeepc->platform_device->dev, eeepc, 1132 &eeepcbl_ops, &props); 1133 if (IS_ERR(bd)) { 1134 pr_err("Could not register eeepc backlight device\n"); 1135 eeepc->backlight_device = NULL; 1136 return PTR_ERR(bd); 1137 } 1138 eeepc->backlight_device = bd; 1139 bd->props.brightness = read_brightness(bd); 1140 bd->props.power = FB_BLANK_UNBLANK; 1141 backlight_update_status(bd); 1142 return 0; 1143 } 1144 1145 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc) 1146 { 1147 backlight_device_unregister(eeepc->backlight_device); 1148 eeepc->backlight_device = NULL; 1149 } 1150 1151 1152 /* 1153 * Input device (i.e. hotkeys) 1154 */ 1155 static int eeepc_input_init(struct eeepc_laptop *eeepc) 1156 { 1157 struct input_dev *input; 1158 int error; 1159 1160 input = input_allocate_device(); 1161 if (!input) 1162 return -ENOMEM; 1163 1164 input->name = "Asus EeePC extra buttons"; 1165 input->phys = EEEPC_LAPTOP_FILE "/input0"; 1166 input->id.bustype = BUS_HOST; 1167 input->dev.parent = &eeepc->platform_device->dev; 1168 1169 error = sparse_keymap_setup(input, eeepc_keymap, NULL); 1170 if (error) { 1171 pr_err("Unable to setup input device keymap\n"); 1172 goto err_free_dev; 1173 } 1174 1175 error = input_register_device(input); 1176 if (error) { 1177 pr_err("Unable to register input device\n"); 1178 goto err_free_dev; 1179 } 1180 1181 eeepc->inputdev = input; 1182 return 0; 1183 1184 err_free_dev: 1185 input_free_device(input); 1186 return error; 1187 } 1188 1189 static void eeepc_input_exit(struct eeepc_laptop *eeepc) 1190 { 1191 if (eeepc->inputdev) 1192 input_unregister_device(eeepc->inputdev); 1193 eeepc->inputdev = NULL; 1194 } 1195 1196 /* 1197 * ACPI driver 1198 */ 1199 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event) 1200 { 1201 if (!eeepc->inputdev) 1202 return; 1203 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true)) 1204 pr_info("Unknown key %x pressed\n", event); 1205 } 1206 1207 static void eeepc_acpi_notify(struct acpi_device *device, u32 event) 1208 { 1209 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1210 int old_brightness, new_brightness; 1211 u16 count; 1212 1213 if (event > ACPI_MAX_SYS_NOTIFY) 1214 return; 1215 count = eeepc->event_count[event % 128]++; 1216 acpi_bus_generate_netlink_event(device->pnp.device_class, 1217 dev_name(&device->dev), event, 1218 count); 1219 1220 /* Brightness events are special */ 1221 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) { 1222 eeepc_input_notify(eeepc, event); 1223 return; 1224 } 1225 1226 /* Ignore them completely if the acpi video driver is used */ 1227 if (!eeepc->backlight_device) 1228 return; 1229 1230 /* Update the backlight device. */ 1231 old_brightness = eeepc_backlight_notify(eeepc); 1232 1233 /* Convert event to keypress (obsolescent hack) */ 1234 new_brightness = event - NOTIFY_BRN_MIN; 1235 1236 if (new_brightness < old_brightness) { 1237 event = NOTIFY_BRN_MIN; /* brightness down */ 1238 } else if (new_brightness > old_brightness) { 1239 event = NOTIFY_BRN_MAX; /* brightness up */ 1240 } else { 1241 /* 1242 * no change in brightness - already at min/max, 1243 * event will be desired value (or else ignored) 1244 */ 1245 } 1246 eeepc_input_notify(eeepc, event); 1247 } 1248 1249 static void eeepc_dmi_check(struct eeepc_laptop *eeepc) 1250 { 1251 const char *model; 1252 1253 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1254 if (!model) 1255 return; 1256 1257 /* 1258 * Blacklist for setting cpufv (cpu speed). 1259 * 1260 * EeePC 4G ("701") implements CFVS, but it is not supported 1261 * by the pre-installed OS, and the original option to change it 1262 * in the BIOS setup screen was removed in later versions. 1263 * 1264 * Judging by the lack of "Super Hybrid Engine" on Asus product pages, 1265 * this applies to all "701" models (4G/4G Surf/2G Surf). 1266 * 1267 * So Asus made a deliberate decision not to support it on this model. 1268 * We have several reports that using it can cause the system to hang 1269 * 1270 * The hang has also been reported on a "702" (Model name "8G"?). 1271 * 1272 * We avoid dmi_check_system() / dmi_match(), because they use 1273 * substring matching. We don't want to affect the "701SD" 1274 * and "701SDX" models, because they do support S.H.E. 1275 */ 1276 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) { 1277 eeepc->cpufv_disabled = true; 1278 pr_info("model %s does not officially support setting cpu speed\n", 1279 model); 1280 pr_info("cpufv disabled to avoid instability\n"); 1281 } 1282 1283 /* 1284 * Blacklist for wlan hotplug 1285 * 1286 * Eeepc 1005HA doesn't work like others models and don't need the 1287 * hotplug code. In fact, current hotplug code seems to unplug another 1288 * device... 1289 */ 1290 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 || 1291 strcmp(model, "1005PE") == 0) { 1292 eeepc->hotplug_disabled = true; 1293 pr_info("wlan hotplug disabled\n"); 1294 } 1295 } 1296 1297 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name) 1298 { 1299 int dummy; 1300 1301 /* Some BIOSes do not report cm although it is available. 1302 Check if cm_getv[cm] works and, if yes, assume cm should be set. */ 1303 if (!(eeepc->cm_supported & (1 << cm)) 1304 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) { 1305 pr_info("%s (%x) not reported by BIOS, enabling anyway\n", 1306 name, 1 << cm); 1307 eeepc->cm_supported |= 1 << cm; 1308 } 1309 } 1310 1311 static void cmsg_quirks(struct eeepc_laptop *eeepc) 1312 { 1313 cmsg_quirk(eeepc, CM_ASL_LID, "LID"); 1314 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE"); 1315 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER"); 1316 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD"); 1317 } 1318 1319 static int eeepc_acpi_init(struct eeepc_laptop *eeepc) 1320 { 1321 unsigned int init_flags; 1322 int result; 1323 1324 result = acpi_bus_get_status(eeepc->device); 1325 if (result) 1326 return result; 1327 if (!eeepc->device->status.present) { 1328 pr_err("Hotkey device not present, aborting\n"); 1329 return -ENODEV; 1330 } 1331 1332 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH; 1333 pr_notice("Hotkey init flags 0x%x\n", init_flags); 1334 1335 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) { 1336 pr_err("Hotkey initialization failed\n"); 1337 return -ENODEV; 1338 } 1339 1340 /* get control methods supported */ 1341 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) { 1342 pr_err("Get control methods supported failed\n"); 1343 return -ENODEV; 1344 } 1345 cmsg_quirks(eeepc); 1346 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported); 1347 1348 return 0; 1349 } 1350 1351 static void eeepc_enable_camera(struct eeepc_laptop *eeepc) 1352 { 1353 /* 1354 * If the following call to set_acpi() fails, it's because there's no 1355 * camera so we can ignore the error. 1356 */ 1357 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0) 1358 set_acpi(eeepc, CM_ASL_CAMERA, 1); 1359 } 1360 1361 static bool eeepc_device_present; 1362 1363 static int eeepc_acpi_add(struct acpi_device *device) 1364 { 1365 struct eeepc_laptop *eeepc; 1366 int result; 1367 1368 pr_notice(EEEPC_LAPTOP_NAME "\n"); 1369 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL); 1370 if (!eeepc) 1371 return -ENOMEM; 1372 eeepc->handle = device->handle; 1373 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME); 1374 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS); 1375 device->driver_data = eeepc; 1376 eeepc->device = device; 1377 1378 eeepc->hotplug_disabled = hotplug_disabled; 1379 1380 eeepc_dmi_check(eeepc); 1381 1382 result = eeepc_acpi_init(eeepc); 1383 if (result) 1384 goto fail_platform; 1385 eeepc_enable_camera(eeepc); 1386 1387 /* 1388 * Register the platform device first. It is used as a parent for the 1389 * sub-devices below. 1390 * 1391 * Note that if there are multiple instances of this ACPI device it 1392 * will bail out, because the platform device is registered with a 1393 * fixed name. Of course it doesn't make sense to have more than one, 1394 * and machine-specific scripts find the fixed name convenient. But 1395 * It's also good for us to exclude multiple instances because both 1396 * our hwmon and our wlan rfkill subdevice use global ACPI objects 1397 * (the EC and the PCI wlan slot respectively). 1398 */ 1399 result = eeepc_platform_init(eeepc); 1400 if (result) 1401 goto fail_platform; 1402 1403 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) { 1404 result = eeepc_backlight_init(eeepc); 1405 if (result) 1406 goto fail_backlight; 1407 } 1408 1409 result = eeepc_input_init(eeepc); 1410 if (result) 1411 goto fail_input; 1412 1413 result = eeepc_hwmon_init(eeepc); 1414 if (result) 1415 goto fail_hwmon; 1416 1417 result = eeepc_led_init(eeepc); 1418 if (result) 1419 goto fail_led; 1420 1421 result = eeepc_rfkill_init(eeepc); 1422 if (result) 1423 goto fail_rfkill; 1424 1425 eeepc_device_present = true; 1426 return 0; 1427 1428 fail_rfkill: 1429 eeepc_led_exit(eeepc); 1430 fail_led: 1431 fail_hwmon: 1432 eeepc_input_exit(eeepc); 1433 fail_input: 1434 eeepc_backlight_exit(eeepc); 1435 fail_backlight: 1436 eeepc_platform_exit(eeepc); 1437 fail_platform: 1438 kfree(eeepc); 1439 1440 return result; 1441 } 1442 1443 static void eeepc_acpi_remove(struct acpi_device *device) 1444 { 1445 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1446 1447 eeepc_backlight_exit(eeepc); 1448 eeepc_rfkill_exit(eeepc); 1449 eeepc_input_exit(eeepc); 1450 eeepc_led_exit(eeepc); 1451 eeepc_platform_exit(eeepc); 1452 1453 kfree(eeepc); 1454 } 1455 1456 1457 static const struct acpi_device_id eeepc_device_ids[] = { 1458 {EEEPC_ACPI_HID, 0}, 1459 {"", 0}, 1460 }; 1461 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids); 1462 1463 static struct acpi_driver eeepc_acpi_driver = { 1464 .name = EEEPC_LAPTOP_NAME, 1465 .class = EEEPC_ACPI_CLASS, 1466 .ids = eeepc_device_ids, 1467 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 1468 .ops = { 1469 .add = eeepc_acpi_add, 1470 .remove = eeepc_acpi_remove, 1471 .notify = eeepc_acpi_notify, 1472 }, 1473 }; 1474 1475 1476 static int __init eeepc_laptop_init(void) 1477 { 1478 int result; 1479 1480 result = platform_driver_register(&platform_driver); 1481 if (result < 0) 1482 return result; 1483 1484 result = acpi_bus_register_driver(&eeepc_acpi_driver); 1485 if (result < 0) 1486 goto fail_acpi_driver; 1487 1488 if (!eeepc_device_present) { 1489 result = -ENODEV; 1490 goto fail_no_device; 1491 } 1492 1493 return 0; 1494 1495 fail_no_device: 1496 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1497 fail_acpi_driver: 1498 platform_driver_unregister(&platform_driver); 1499 return result; 1500 } 1501 1502 static void __exit eeepc_laptop_exit(void) 1503 { 1504 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1505 platform_driver_unregister(&platform_driver); 1506 } 1507 1508 module_init(eeepc_laptop_init); 1509 module_exit(eeepc_laptop_exit); 1510