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