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 <acpi/acpi_drivers.h> 32 #include <acpi/acpi_bus.h> 33 #include <linux/uaccess.h> 34 #include <linux/input.h> 35 #include <linux/input/sparse-keymap.h> 36 #include <linux/rfkill.h> 37 #include <linux/pci.h> 38 #include <linux/pci_hotplug.h> 39 #include <linux/leds.h> 40 #include <linux/dmi.h> 41 42 #define EEEPC_LAPTOP_VERSION "0.1" 43 #define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver" 44 #define EEEPC_LAPTOP_FILE "eeepc" 45 46 #define EEEPC_ACPI_CLASS "hotkey" 47 #define EEEPC_ACPI_DEVICE_NAME "Hotkey" 48 #define EEEPC_ACPI_HID "ASUS010" 49 50 MODULE_AUTHOR("Corentin Chary, Eric Cooper"); 51 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME); 52 MODULE_LICENSE("GPL"); 53 54 static bool hotplug_disabled; 55 56 module_param(hotplug_disabled, bool, 0444); 57 MODULE_PARM_DESC(hotplug_disabled, 58 "Disable hotplug for wireless device. " 59 "If your laptop need that, please report to " 60 "acpi4asus-user@lists.sourceforge.net."); 61 62 /* 63 * Definitions for Asus EeePC 64 */ 65 #define NOTIFY_BRN_MIN 0x20 66 #define NOTIFY_BRN_MAX 0x2f 67 68 enum { 69 DISABLE_ASL_WLAN = 0x0001, 70 DISABLE_ASL_BLUETOOTH = 0x0002, 71 DISABLE_ASL_IRDA = 0x0004, 72 DISABLE_ASL_CAMERA = 0x0008, 73 DISABLE_ASL_TV = 0x0010, 74 DISABLE_ASL_GPS = 0x0020, 75 DISABLE_ASL_DISPLAYSWITCH = 0x0040, 76 DISABLE_ASL_MODEM = 0x0080, 77 DISABLE_ASL_CARDREADER = 0x0100, 78 DISABLE_ASL_3G = 0x0200, 79 DISABLE_ASL_WIMAX = 0x0400, 80 DISABLE_ASL_HWCF = 0x0800 81 }; 82 83 enum { 84 CM_ASL_WLAN = 0, 85 CM_ASL_BLUETOOTH, 86 CM_ASL_IRDA, 87 CM_ASL_1394, 88 CM_ASL_CAMERA, 89 CM_ASL_TV, 90 CM_ASL_GPS, 91 CM_ASL_DVDROM, 92 CM_ASL_DISPLAYSWITCH, 93 CM_ASL_PANELBRIGHT, 94 CM_ASL_BIOSFLASH, 95 CM_ASL_ACPIFLASH, 96 CM_ASL_CPUFV, 97 CM_ASL_CPUTEMPERATURE, 98 CM_ASL_FANCPU, 99 CM_ASL_FANCHASSIS, 100 CM_ASL_USBPORT1, 101 CM_ASL_USBPORT2, 102 CM_ASL_USBPORT3, 103 CM_ASL_MODEM, 104 CM_ASL_CARDREADER, 105 CM_ASL_3G, 106 CM_ASL_WIMAX, 107 CM_ASL_HWCF, 108 CM_ASL_LID, 109 CM_ASL_TYPE, 110 CM_ASL_PANELPOWER, /*P901*/ 111 CM_ASL_TPD 112 }; 113 114 static const char *cm_getv[] = { 115 "WLDG", "BTHG", NULL, NULL, 116 "CAMG", NULL, NULL, NULL, 117 NULL, "PBLG", NULL, NULL, 118 "CFVG", NULL, NULL, NULL, 119 "USBG", NULL, NULL, "MODG", 120 "CRDG", "M3GG", "WIMG", "HWCF", 121 "LIDG", "TYPE", "PBPG", "TPDG" 122 }; 123 124 static const char *cm_setv[] = { 125 "WLDS", "BTHS", NULL, NULL, 126 "CAMS", NULL, NULL, NULL, 127 "SDSP", "PBLS", "HDPS", NULL, 128 "CFVS", NULL, NULL, NULL, 129 "USBG", NULL, NULL, "MODS", 130 "CRDS", "M3GS", "WIMS", NULL, 131 NULL, NULL, "PBPS", "TPDS" 132 }; 133 134 static const struct key_entry eeepc_keymap[] = { 135 { KE_KEY, 0x10, { KEY_WLAN } }, 136 { KE_KEY, 0x11, { KEY_WLAN } }, 137 { KE_KEY, 0x12, { KEY_PROG1 } }, 138 { KE_KEY, 0x13, { KEY_MUTE } }, 139 { KE_KEY, 0x14, { KEY_VOLUMEDOWN } }, 140 { KE_KEY, 0x15, { KEY_VOLUMEUP } }, 141 { KE_KEY, 0x16, { KEY_DISPLAY_OFF } }, 142 { KE_KEY, 0x1a, { KEY_COFFEE } }, 143 { KE_KEY, 0x1b, { KEY_ZOOM } }, 144 { KE_KEY, 0x1c, { KEY_PROG2 } }, 145 { KE_KEY, 0x1d, { KEY_PROG3 } }, 146 { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } }, 147 { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } }, 148 { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } }, 149 { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } }, 150 { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } }, 151 { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */ 152 { KE_KEY, 0x38, { KEY_F14 } }, 153 { KE_END, 0 }, 154 }; 155 156 /* 157 * This is the main structure, we can use it to store useful information 158 */ 159 struct eeepc_laptop { 160 acpi_handle handle; /* the handle of the acpi device */ 161 u32 cm_supported; /* the control methods supported 162 by this BIOS */ 163 bool cpufv_disabled; 164 bool hotplug_disabled; 165 u16 event_count[128]; /* count for each event */ 166 167 struct platform_device *platform_device; 168 struct acpi_device *device; /* the device we are in */ 169 struct device *hwmon_device; 170 struct backlight_device *backlight_device; 171 172 struct input_dev *inputdev; 173 174 struct rfkill *wlan_rfkill; 175 struct rfkill *bluetooth_rfkill; 176 struct rfkill *wwan3g_rfkill; 177 struct rfkill *wimax_rfkill; 178 179 struct hotplug_slot *hotplug_slot; 180 struct mutex hotplug_lock; 181 182 struct led_classdev tpd_led; 183 int tpd_led_wk; 184 struct workqueue_struct *led_workqueue; 185 struct work_struct tpd_led_work; 186 }; 187 188 /* 189 * ACPI Helpers 190 */ 191 static int write_acpi_int(acpi_handle handle, const char *method, int val) 192 { 193 acpi_status status; 194 195 status = acpi_execute_simple_method(handle, (char *)method, val); 196 197 return (status == AE_OK ? 0 : -1); 198 } 199 200 static int read_acpi_int(acpi_handle handle, const char *method, int *val) 201 { 202 acpi_status status; 203 unsigned long long result; 204 205 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result); 206 if (ACPI_FAILURE(status)) { 207 *val = -1; 208 return -1; 209 } else { 210 *val = result; 211 return 0; 212 } 213 } 214 215 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value) 216 { 217 const char *method = cm_setv[cm]; 218 219 if (method == NULL) 220 return -ENODEV; 221 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 222 return -ENODEV; 223 224 if (write_acpi_int(eeepc->handle, method, value)) 225 pr_warn("Error writing %s\n", method); 226 return 0; 227 } 228 229 static int get_acpi(struct eeepc_laptop *eeepc, int cm) 230 { 231 const char *method = cm_getv[cm]; 232 int value; 233 234 if (method == NULL) 235 return -ENODEV; 236 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 237 return -ENODEV; 238 239 if (read_acpi_int(eeepc->handle, method, &value)) 240 pr_warn("Error reading %s\n", method); 241 return value; 242 } 243 244 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm, 245 acpi_handle *handle) 246 { 247 const char *method = cm_setv[cm]; 248 acpi_status status; 249 250 if (method == NULL) 251 return -ENODEV; 252 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 253 return -ENODEV; 254 255 status = acpi_get_handle(eeepc->handle, (char *)method, 256 handle); 257 if (status != AE_OK) { 258 pr_warn("Error finding %s\n", method); 259 return -ENODEV; 260 } 261 return 0; 262 } 263 264 265 /* 266 * Sys helpers 267 */ 268 static int parse_arg(const char *buf, unsigned long count, int *val) 269 { 270 if (!count) 271 return 0; 272 if (sscanf(buf, "%i", val) != 1) 273 return -EINVAL; 274 return count; 275 } 276 277 static ssize_t store_sys_acpi(struct device *dev, int cm, 278 const char *buf, size_t count) 279 { 280 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 281 int rv, value; 282 283 rv = parse_arg(buf, count, &value); 284 if (rv > 0) 285 value = set_acpi(eeepc, cm, value); 286 if (value < 0) 287 return -EIO; 288 return rv; 289 } 290 291 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf) 292 { 293 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 294 int value = get_acpi(eeepc, cm); 295 296 if (value < 0) 297 return -EIO; 298 return sprintf(buf, "%d\n", value); 299 } 300 301 #define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm) \ 302 static ssize_t show_##_name(struct device *dev, \ 303 struct device_attribute *attr, \ 304 char *buf) \ 305 { \ 306 return show_sys_acpi(dev, _cm, buf); \ 307 } \ 308 static ssize_t store_##_name(struct device *dev, \ 309 struct device_attribute *attr, \ 310 const char *buf, size_t count) \ 311 { \ 312 return store_sys_acpi(dev, _cm, buf, count); \ 313 } \ 314 static struct device_attribute dev_attr_##_name = { \ 315 .attr = { \ 316 .name = __stringify(_name), \ 317 .mode = _mode }, \ 318 .show = show_##_name, \ 319 .store = store_##_name, \ 320 } 321 322 EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA); 323 EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER); 324 EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH); 325 326 struct eeepc_cpufv { 327 int num; 328 int cur; 329 }; 330 331 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c) 332 { 333 c->cur = get_acpi(eeepc, CM_ASL_CPUFV); 334 c->num = (c->cur >> 8) & 0xff; 335 c->cur &= 0xff; 336 if (c->cur < 0 || c->num <= 0 || c->num > 12) 337 return -ENODEV; 338 return 0; 339 } 340 341 static ssize_t show_available_cpufv(struct device *dev, 342 struct device_attribute *attr, 343 char *buf) 344 { 345 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 346 struct eeepc_cpufv c; 347 int i; 348 ssize_t len = 0; 349 350 if (get_cpufv(eeepc, &c)) 351 return -ENODEV; 352 for (i = 0; i < c.num; i++) 353 len += sprintf(buf + len, "%d ", i); 354 len += sprintf(buf + len, "\n"); 355 return len; 356 } 357 358 static ssize_t show_cpufv(struct device *dev, 359 struct device_attribute *attr, 360 char *buf) 361 { 362 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 363 struct eeepc_cpufv c; 364 365 if (get_cpufv(eeepc, &c)) 366 return -ENODEV; 367 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur); 368 } 369 370 static ssize_t store_cpufv(struct device *dev, 371 struct device_attribute *attr, 372 const char *buf, size_t count) 373 { 374 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 375 struct eeepc_cpufv c; 376 int rv, value; 377 378 if (eeepc->cpufv_disabled) 379 return -EPERM; 380 if (get_cpufv(eeepc, &c)) 381 return -ENODEV; 382 rv = parse_arg(buf, count, &value); 383 if (rv < 0) 384 return rv; 385 if (!rv || value < 0 || value >= c.num) 386 return -EINVAL; 387 set_acpi(eeepc, CM_ASL_CPUFV, value); 388 return rv; 389 } 390 391 static ssize_t show_cpufv_disabled(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 store_cpufv_disabled(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, count, &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 " 415 "on this model)\n"); 416 eeepc->cpufv_disabled = false; 417 return rv; 418 case 1: 419 return -EPERM; 420 default: 421 return -EINVAL; 422 } 423 } 424 425 426 static struct device_attribute dev_attr_cpufv = { 427 .attr = { 428 .name = "cpufv", 429 .mode = 0644 }, 430 .show = show_cpufv, 431 .store = store_cpufv 432 }; 433 434 static struct device_attribute dev_attr_available_cpufv = { 435 .attr = { 436 .name = "available_cpufv", 437 .mode = 0444 }, 438 .show = show_available_cpufv 439 }; 440 441 static struct device_attribute dev_attr_cpufv_disabled = { 442 .attr = { 443 .name = "cpufv_disabled", 444 .mode = 0644 }, 445 .show = show_cpufv_disabled, 446 .store = store_cpufv_disabled 447 }; 448 449 450 static struct attribute *platform_attributes[] = { 451 &dev_attr_camera.attr, 452 &dev_attr_cardr.attr, 453 &dev_attr_disp.attr, 454 &dev_attr_cpufv.attr, 455 &dev_attr_available_cpufv.attr, 456 &dev_attr_cpufv_disabled.attr, 457 NULL 458 }; 459 460 static struct attribute_group platform_attribute_group = { 461 .attrs = platform_attributes 462 }; 463 464 static int eeepc_platform_init(struct eeepc_laptop *eeepc) 465 { 466 int result; 467 468 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1); 469 if (!eeepc->platform_device) 470 return -ENOMEM; 471 platform_set_drvdata(eeepc->platform_device, eeepc); 472 473 result = platform_device_add(eeepc->platform_device); 474 if (result) 475 goto fail_platform_device; 476 477 result = sysfs_create_group(&eeepc->platform_device->dev.kobj, 478 &platform_attribute_group); 479 if (result) 480 goto fail_sysfs; 481 return 0; 482 483 fail_sysfs: 484 platform_device_del(eeepc->platform_device); 485 fail_platform_device: 486 platform_device_put(eeepc->platform_device); 487 return result; 488 } 489 490 static void eeepc_platform_exit(struct eeepc_laptop *eeepc) 491 { 492 sysfs_remove_group(&eeepc->platform_device->dev.kobj, 493 &platform_attribute_group); 494 platform_device_unregister(eeepc->platform_device); 495 } 496 497 /* 498 * LEDs 499 */ 500 /* 501 * These functions actually update the LED's, and are called from a 502 * workqueue. By doing this as separate work rather than when the LED 503 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 504 * potentially bad time, such as a timer interrupt. 505 */ 506 static void tpd_led_update(struct work_struct *work) 507 { 508 struct eeepc_laptop *eeepc; 509 510 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work); 511 512 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk); 513 } 514 515 static void tpd_led_set(struct led_classdev *led_cdev, 516 enum led_brightness value) 517 { 518 struct eeepc_laptop *eeepc; 519 520 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 521 522 eeepc->tpd_led_wk = (value > 0) ? 1 : 0; 523 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 524 } 525 526 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 527 { 528 struct eeepc_laptop *eeepc; 529 530 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 531 532 return get_acpi(eeepc, CM_ASL_TPD); 533 } 534 535 static int eeepc_led_init(struct eeepc_laptop *eeepc) 536 { 537 int rv; 538 539 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV) 540 return 0; 541 542 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 543 if (!eeepc->led_workqueue) 544 return -ENOMEM; 545 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 546 547 eeepc->tpd_led.name = "eeepc::touchpad"; 548 eeepc->tpd_led.brightness_set = tpd_led_set; 549 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */ 550 eeepc->tpd_led.brightness_get = tpd_led_get; 551 eeepc->tpd_led.max_brightness = 1; 552 553 rv = led_classdev_register(&eeepc->platform_device->dev, 554 &eeepc->tpd_led); 555 if (rv) { 556 destroy_workqueue(eeepc->led_workqueue); 557 return rv; 558 } 559 560 return 0; 561 } 562 563 static void eeepc_led_exit(struct eeepc_laptop *eeepc) 564 { 565 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev)) 566 led_classdev_unregister(&eeepc->tpd_led); 567 if (eeepc->led_workqueue) 568 destroy_workqueue(eeepc->led_workqueue); 569 } 570 571 572 /* 573 * PCI hotplug (for wlan rfkill) 574 */ 575 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc) 576 { 577 if (get_acpi(eeepc, CM_ASL_WLAN) == 1) 578 return false; 579 return true; 580 } 581 582 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle) 583 { 584 struct pci_dev *port; 585 struct pci_dev *dev; 586 struct pci_bus *bus; 587 bool blocked = eeepc_wlan_rfkill_blocked(eeepc); 588 bool absent; 589 u32 l; 590 591 if (eeepc->wlan_rfkill) 592 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 593 594 mutex_lock(&eeepc->hotplug_lock); 595 596 if (eeepc->hotplug_slot) { 597 port = acpi_get_pci_dev(handle); 598 if (!port) { 599 pr_warning("Unable to find port\n"); 600 goto out_unlock; 601 } 602 603 bus = port->subordinate; 604 605 if (!bus) { 606 pr_warn("Unable to find PCI bus 1?\n"); 607 goto out_put_dev; 608 } 609 610 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 611 pr_err("Unable to read PCI config space?\n"); 612 goto out_put_dev; 613 } 614 615 absent = (l == 0xffffffff); 616 617 if (blocked != absent) { 618 pr_warn("BIOS says wireless lan is %s, " 619 "but the pci device is %s\n", 620 blocked ? "blocked" : "unblocked", 621 absent ? "absent" : "present"); 622 pr_warn("skipped wireless hotplug as probably " 623 "inappropriate for this model\n"); 624 goto out_put_dev; 625 } 626 627 if (!blocked) { 628 dev = pci_get_slot(bus, 0); 629 if (dev) { 630 /* Device already present */ 631 pci_dev_put(dev); 632 goto out_put_dev; 633 } 634 dev = pci_scan_single_device(bus, 0); 635 if (dev) { 636 pci_bus_assign_resources(bus); 637 if (pci_bus_add_device(dev)) 638 pr_err("Unable to hotplug wifi\n"); 639 } 640 } else { 641 dev = pci_get_slot(bus, 0); 642 if (dev) { 643 pci_stop_and_remove_bus_device(dev); 644 pci_dev_put(dev); 645 } 646 } 647 out_put_dev: 648 pci_dev_put(port); 649 } 650 651 out_unlock: 652 mutex_unlock(&eeepc->hotplug_lock); 653 } 654 655 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node) 656 { 657 acpi_status status = AE_OK; 658 acpi_handle handle; 659 660 status = acpi_get_handle(NULL, node, &handle); 661 662 if (ACPI_SUCCESS(status)) 663 eeepc_rfkill_hotplug(eeepc, handle); 664 } 665 666 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 667 { 668 struct eeepc_laptop *eeepc = data; 669 670 if (event != ACPI_NOTIFY_BUS_CHECK) 671 return; 672 673 eeepc_rfkill_hotplug(eeepc, handle); 674 } 675 676 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc, 677 char *node) 678 { 679 acpi_status status; 680 acpi_handle handle; 681 682 status = acpi_get_handle(NULL, node, &handle); 683 684 if (ACPI_SUCCESS(status)) { 685 status = acpi_install_notify_handler(handle, 686 ACPI_SYSTEM_NOTIFY, 687 eeepc_rfkill_notify, 688 eeepc); 689 if (ACPI_FAILURE(status)) 690 pr_warn("Failed to register notify on %s\n", node); 691 692 /* 693 * Refresh pci hotplug in case the rfkill state was 694 * changed during setup. 695 */ 696 eeepc_rfkill_hotplug(eeepc, handle); 697 } else 698 return -ENODEV; 699 700 return 0; 701 } 702 703 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc, 704 char *node) 705 { 706 acpi_status status = AE_OK; 707 acpi_handle handle; 708 709 status = acpi_get_handle(NULL, node, &handle); 710 711 if (ACPI_SUCCESS(status)) { 712 status = acpi_remove_notify_handler(handle, 713 ACPI_SYSTEM_NOTIFY, 714 eeepc_rfkill_notify); 715 if (ACPI_FAILURE(status)) 716 pr_err("Error removing rfkill notify handler %s\n", 717 node); 718 /* 719 * Refresh pci hotplug in case the rfkill 720 * state was changed after 721 * eeepc_unregister_rfkill_notifier() 722 */ 723 eeepc_rfkill_hotplug(eeepc, handle); 724 } 725 } 726 727 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 728 u8 *value) 729 { 730 struct eeepc_laptop *eeepc = hotplug_slot->private; 731 int val = get_acpi(eeepc, CM_ASL_WLAN); 732 733 if (val == 1 || val == 0) 734 *value = val; 735 else 736 return -EINVAL; 737 738 return 0; 739 } 740 741 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 742 { 743 kfree(hotplug_slot->info); 744 kfree(hotplug_slot); 745 } 746 747 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 748 .owner = THIS_MODULE, 749 .get_adapter_status = eeepc_get_adapter_status, 750 .get_power_status = eeepc_get_adapter_status, 751 }; 752 753 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc) 754 { 755 int ret = -ENOMEM; 756 struct pci_bus *bus = pci_find_bus(0, 1); 757 758 if (!bus) { 759 pr_err("Unable to find wifi PCI bus\n"); 760 return -ENODEV; 761 } 762 763 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 764 if (!eeepc->hotplug_slot) 765 goto error_slot; 766 767 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 768 GFP_KERNEL); 769 if (!eeepc->hotplug_slot->info) 770 goto error_info; 771 772 eeepc->hotplug_slot->private = eeepc; 773 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 774 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 775 eeepc_get_adapter_status(eeepc->hotplug_slot, 776 &eeepc->hotplug_slot->info->adapter_status); 777 778 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 779 if (ret) { 780 pr_err("Unable to register hotplug slot - %d\n", ret); 781 goto error_register; 782 } 783 784 return 0; 785 786 error_register: 787 kfree(eeepc->hotplug_slot->info); 788 error_info: 789 kfree(eeepc->hotplug_slot); 790 eeepc->hotplug_slot = NULL; 791 error_slot: 792 return ret; 793 } 794 795 /* 796 * Rfkill devices 797 */ 798 static int eeepc_rfkill_set(void *data, bool blocked) 799 { 800 acpi_handle handle = data; 801 802 return write_acpi_int(handle, NULL, !blocked); 803 } 804 805 static const struct rfkill_ops eeepc_rfkill_ops = { 806 .set_block = eeepc_rfkill_set, 807 }; 808 809 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc, 810 struct rfkill **rfkill, 811 const char *name, 812 enum rfkill_type type, int cm) 813 { 814 acpi_handle handle; 815 int result; 816 817 result = acpi_setter_handle(eeepc, cm, &handle); 818 if (result < 0) 819 return result; 820 821 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 822 &eeepc_rfkill_ops, handle); 823 824 if (!*rfkill) 825 return -EINVAL; 826 827 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1); 828 result = rfkill_register(*rfkill); 829 if (result) { 830 rfkill_destroy(*rfkill); 831 *rfkill = NULL; 832 return result; 833 } 834 return 0; 835 } 836 837 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc) 838 { 839 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 840 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 841 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 842 if (eeepc->wlan_rfkill) { 843 rfkill_unregister(eeepc->wlan_rfkill); 844 rfkill_destroy(eeepc->wlan_rfkill); 845 eeepc->wlan_rfkill = NULL; 846 } 847 848 if (eeepc->hotplug_slot) 849 pci_hp_deregister(eeepc->hotplug_slot); 850 851 if (eeepc->bluetooth_rfkill) { 852 rfkill_unregister(eeepc->bluetooth_rfkill); 853 rfkill_destroy(eeepc->bluetooth_rfkill); 854 eeepc->bluetooth_rfkill = NULL; 855 } 856 if (eeepc->wwan3g_rfkill) { 857 rfkill_unregister(eeepc->wwan3g_rfkill); 858 rfkill_destroy(eeepc->wwan3g_rfkill); 859 eeepc->wwan3g_rfkill = NULL; 860 } 861 if (eeepc->wimax_rfkill) { 862 rfkill_unregister(eeepc->wimax_rfkill); 863 rfkill_destroy(eeepc->wimax_rfkill); 864 eeepc->wimax_rfkill = NULL; 865 } 866 } 867 868 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc) 869 { 870 int result = 0; 871 872 mutex_init(&eeepc->hotplug_lock); 873 874 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 875 "eeepc-wlan", RFKILL_TYPE_WLAN, 876 CM_ASL_WLAN); 877 878 if (result && result != -ENODEV) 879 goto exit; 880 881 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 882 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 883 CM_ASL_BLUETOOTH); 884 885 if (result && result != -ENODEV) 886 goto exit; 887 888 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 889 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 890 CM_ASL_3G); 891 892 if (result && result != -ENODEV) 893 goto exit; 894 895 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, 896 "eeepc-wimax", RFKILL_TYPE_WIMAX, 897 CM_ASL_WIMAX); 898 899 if (result && result != -ENODEV) 900 goto exit; 901 902 if (eeepc->hotplug_disabled) 903 return 0; 904 905 result = eeepc_setup_pci_hotplug(eeepc); 906 /* 907 * If we get -EBUSY then something else is handling the PCI hotplug - 908 * don't fail in this case 909 */ 910 if (result == -EBUSY) 911 result = 0; 912 913 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 914 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 915 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 916 917 exit: 918 if (result && result != -ENODEV) 919 eeepc_rfkill_exit(eeepc); 920 return result; 921 } 922 923 /* 924 * Platform driver - hibernate/resume callbacks 925 */ 926 static int eeepc_hotk_thaw(struct device *device) 927 { 928 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 929 930 if (eeepc->wlan_rfkill) { 931 bool wlan; 932 933 /* 934 * Work around bios bug - acpi _PTS turns off the wireless led 935 * during suspend. Normally it restores it on resume, but 936 * we should kick it ourselves in case hibernation is aborted. 937 */ 938 wlan = get_acpi(eeepc, CM_ASL_WLAN); 939 set_acpi(eeepc, CM_ASL_WLAN, wlan); 940 } 941 942 return 0; 943 } 944 945 static int eeepc_hotk_restore(struct device *device) 946 { 947 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 948 949 /* Refresh both wlan rfkill state and pci hotplug */ 950 if (eeepc->wlan_rfkill) { 951 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P5"); 952 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P6"); 953 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P7"); 954 } 955 956 if (eeepc->bluetooth_rfkill) 957 rfkill_set_sw_state(eeepc->bluetooth_rfkill, 958 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1); 959 if (eeepc->wwan3g_rfkill) 960 rfkill_set_sw_state(eeepc->wwan3g_rfkill, 961 get_acpi(eeepc, CM_ASL_3G) != 1); 962 if (eeepc->wimax_rfkill) 963 rfkill_set_sw_state(eeepc->wimax_rfkill, 964 get_acpi(eeepc, CM_ASL_WIMAX) != 1); 965 966 return 0; 967 } 968 969 static const struct dev_pm_ops eeepc_pm_ops = { 970 .thaw = eeepc_hotk_thaw, 971 .restore = eeepc_hotk_restore, 972 }; 973 974 static struct platform_driver platform_driver = { 975 .driver = { 976 .name = EEEPC_LAPTOP_FILE, 977 .owner = THIS_MODULE, 978 .pm = &eeepc_pm_ops, 979 } 980 }; 981 982 /* 983 * Hwmon device 984 */ 985 986 #define EEEPC_EC_SC00 0x61 987 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */ 988 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */ 989 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */ 990 991 #define EEEPC_EC_SFB0 0xD0 992 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */ 993 994 static int eeepc_get_fan_pwm(void) 995 { 996 u8 value = 0; 997 998 ec_read(EEEPC_EC_FAN_PWM, &value); 999 return value * 255 / 100; 1000 } 1001 1002 static void eeepc_set_fan_pwm(int value) 1003 { 1004 value = clamp_val(value, 0, 255); 1005 value = value * 100 / 255; 1006 ec_write(EEEPC_EC_FAN_PWM, value); 1007 } 1008 1009 static int eeepc_get_fan_rpm(void) 1010 { 1011 u8 high = 0; 1012 u8 low = 0; 1013 1014 ec_read(EEEPC_EC_FAN_HRPM, &high); 1015 ec_read(EEEPC_EC_FAN_LRPM, &low); 1016 return high << 8 | low; 1017 } 1018 1019 static int eeepc_get_fan_ctrl(void) 1020 { 1021 u8 value = 0; 1022 1023 ec_read(EEEPC_EC_FAN_CTRL, &value); 1024 if (value & 0x02) 1025 return 1; /* manual */ 1026 else 1027 return 2; /* automatic */ 1028 } 1029 1030 static void eeepc_set_fan_ctrl(int manual) 1031 { 1032 u8 value = 0; 1033 1034 ec_read(EEEPC_EC_FAN_CTRL, &value); 1035 if (manual == 1) 1036 value |= 0x02; 1037 else 1038 value &= ~0x02; 1039 ec_write(EEEPC_EC_FAN_CTRL, value); 1040 } 1041 1042 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count) 1043 { 1044 int rv, value; 1045 1046 rv = parse_arg(buf, count, &value); 1047 if (rv > 0) 1048 set(value); 1049 return rv; 1050 } 1051 1052 static ssize_t show_sys_hwmon(int (*get)(void), char *buf) 1053 { 1054 return sprintf(buf, "%d\n", get()); 1055 } 1056 1057 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \ 1058 static ssize_t show_##_name(struct device *dev, \ 1059 struct device_attribute *attr, \ 1060 char *buf) \ 1061 { \ 1062 return show_sys_hwmon(_set, buf); \ 1063 } \ 1064 static ssize_t store_##_name(struct device *dev, \ 1065 struct device_attribute *attr, \ 1066 const char *buf, size_t count) \ 1067 { \ 1068 return store_sys_hwmon(_get, buf, count); \ 1069 } \ 1070 static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0); 1071 1072 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL); 1073 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR, 1074 eeepc_get_fan_pwm, eeepc_set_fan_pwm); 1075 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, 1076 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl); 1077 1078 static ssize_t 1079 show_name(struct device *dev, struct device_attribute *attr, char *buf) 1080 { 1081 return sprintf(buf, "eeepc\n"); 1082 } 1083 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0); 1084 1085 static struct attribute *hwmon_attributes[] = { 1086 &sensor_dev_attr_pwm1.dev_attr.attr, 1087 &sensor_dev_attr_fan1_input.dev_attr.attr, 1088 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1089 &sensor_dev_attr_name.dev_attr.attr, 1090 NULL 1091 }; 1092 1093 static struct attribute_group hwmon_attribute_group = { 1094 .attrs = hwmon_attributes 1095 }; 1096 1097 static void eeepc_hwmon_exit(struct eeepc_laptop *eeepc) 1098 { 1099 struct device *hwmon; 1100 1101 hwmon = eeepc->hwmon_device; 1102 if (!hwmon) 1103 return; 1104 sysfs_remove_group(&hwmon->kobj, 1105 &hwmon_attribute_group); 1106 hwmon_device_unregister(hwmon); 1107 eeepc->hwmon_device = NULL; 1108 } 1109 1110 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc) 1111 { 1112 struct device *hwmon; 1113 int result; 1114 1115 hwmon = hwmon_device_register(&eeepc->platform_device->dev); 1116 if (IS_ERR(hwmon)) { 1117 pr_err("Could not register eeepc hwmon device\n"); 1118 eeepc->hwmon_device = NULL; 1119 return PTR_ERR(hwmon); 1120 } 1121 eeepc->hwmon_device = hwmon; 1122 result = sysfs_create_group(&hwmon->kobj, 1123 &hwmon_attribute_group); 1124 if (result) 1125 eeepc_hwmon_exit(eeepc); 1126 return result; 1127 } 1128 1129 /* 1130 * Backlight device 1131 */ 1132 static int read_brightness(struct backlight_device *bd) 1133 { 1134 struct eeepc_laptop *eeepc = bl_get_data(bd); 1135 1136 return get_acpi(eeepc, CM_ASL_PANELBRIGHT); 1137 } 1138 1139 static int set_brightness(struct backlight_device *bd, int value) 1140 { 1141 struct eeepc_laptop *eeepc = bl_get_data(bd); 1142 1143 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value); 1144 } 1145 1146 static int update_bl_status(struct backlight_device *bd) 1147 { 1148 return set_brightness(bd, bd->props.brightness); 1149 } 1150 1151 static const struct backlight_ops eeepcbl_ops = { 1152 .get_brightness = read_brightness, 1153 .update_status = update_bl_status, 1154 }; 1155 1156 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc) 1157 { 1158 struct backlight_device *bd = eeepc->backlight_device; 1159 int old = bd->props.brightness; 1160 1161 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 1162 1163 return old; 1164 } 1165 1166 static int eeepc_backlight_init(struct eeepc_laptop *eeepc) 1167 { 1168 struct backlight_properties props; 1169 struct backlight_device *bd; 1170 1171 memset(&props, 0, sizeof(struct backlight_properties)); 1172 props.type = BACKLIGHT_PLATFORM; 1173 props.max_brightness = 15; 1174 bd = backlight_device_register(EEEPC_LAPTOP_FILE, 1175 &eeepc->platform_device->dev, eeepc, 1176 &eeepcbl_ops, &props); 1177 if (IS_ERR(bd)) { 1178 pr_err("Could not register eeepc backlight device\n"); 1179 eeepc->backlight_device = NULL; 1180 return PTR_ERR(bd); 1181 } 1182 eeepc->backlight_device = bd; 1183 bd->props.brightness = read_brightness(bd); 1184 bd->props.power = FB_BLANK_UNBLANK; 1185 backlight_update_status(bd); 1186 return 0; 1187 } 1188 1189 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc) 1190 { 1191 if (eeepc->backlight_device) 1192 backlight_device_unregister(eeepc->backlight_device); 1193 eeepc->backlight_device = NULL; 1194 } 1195 1196 1197 /* 1198 * Input device (i.e. hotkeys) 1199 */ 1200 static int eeepc_input_init(struct eeepc_laptop *eeepc) 1201 { 1202 struct input_dev *input; 1203 int error; 1204 1205 input = input_allocate_device(); 1206 if (!input) 1207 return -ENOMEM; 1208 1209 input->name = "Asus EeePC extra buttons"; 1210 input->phys = EEEPC_LAPTOP_FILE "/input0"; 1211 input->id.bustype = BUS_HOST; 1212 input->dev.parent = &eeepc->platform_device->dev; 1213 1214 error = sparse_keymap_setup(input, eeepc_keymap, NULL); 1215 if (error) { 1216 pr_err("Unable to setup input device keymap\n"); 1217 goto err_free_dev; 1218 } 1219 1220 error = input_register_device(input); 1221 if (error) { 1222 pr_err("Unable to register input device\n"); 1223 goto err_free_keymap; 1224 } 1225 1226 eeepc->inputdev = input; 1227 return 0; 1228 1229 err_free_keymap: 1230 sparse_keymap_free(input); 1231 err_free_dev: 1232 input_free_device(input); 1233 return error; 1234 } 1235 1236 static void eeepc_input_exit(struct eeepc_laptop *eeepc) 1237 { 1238 if (eeepc->inputdev) { 1239 sparse_keymap_free(eeepc->inputdev); 1240 input_unregister_device(eeepc->inputdev); 1241 } 1242 eeepc->inputdev = NULL; 1243 } 1244 1245 /* 1246 * ACPI driver 1247 */ 1248 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event) 1249 { 1250 if (!eeepc->inputdev) 1251 return ; 1252 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true)) 1253 pr_info("Unknown key %x pressed\n", event); 1254 } 1255 1256 static void eeepc_acpi_notify(struct acpi_device *device, u32 event) 1257 { 1258 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1259 u16 count; 1260 1261 if (event > ACPI_MAX_SYS_NOTIFY) 1262 return; 1263 count = eeepc->event_count[event % 128]++; 1264 acpi_bus_generate_netlink_event(device->pnp.device_class, 1265 dev_name(&device->dev), event, 1266 count); 1267 1268 /* Brightness events are special */ 1269 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) { 1270 1271 /* Ignore them completely if the acpi video driver is used */ 1272 if (eeepc->backlight_device != NULL) { 1273 int old_brightness, new_brightness; 1274 1275 /* Update the backlight device. */ 1276 old_brightness = eeepc_backlight_notify(eeepc); 1277 1278 /* Convert event to keypress (obsolescent hack) */ 1279 new_brightness = event - NOTIFY_BRN_MIN; 1280 1281 if (new_brightness < old_brightness) { 1282 event = NOTIFY_BRN_MIN; /* brightness down */ 1283 } else if (new_brightness > old_brightness) { 1284 event = NOTIFY_BRN_MAX; /* brightness up */ 1285 } else { 1286 /* 1287 * no change in brightness - already at min/max, 1288 * event will be desired value (or else ignored) 1289 */ 1290 } 1291 eeepc_input_notify(eeepc, event); 1292 } 1293 } else { 1294 /* Everything else is a bona-fide keypress event */ 1295 eeepc_input_notify(eeepc, event); 1296 } 1297 } 1298 1299 static void eeepc_dmi_check(struct eeepc_laptop *eeepc) 1300 { 1301 const char *model; 1302 1303 model = dmi_get_system_info(DMI_PRODUCT_NAME); 1304 if (!model) 1305 return; 1306 1307 /* 1308 * Blacklist for setting cpufv (cpu speed). 1309 * 1310 * EeePC 4G ("701") implements CFVS, but it is not supported 1311 * by the pre-installed OS, and the original option to change it 1312 * in the BIOS setup screen was removed in later versions. 1313 * 1314 * Judging by the lack of "Super Hybrid Engine" on Asus product pages, 1315 * this applies to all "701" models (4G/4G Surf/2G Surf). 1316 * 1317 * So Asus made a deliberate decision not to support it on this model. 1318 * We have several reports that using it can cause the system to hang 1319 * 1320 * The hang has also been reported on a "702" (Model name "8G"?). 1321 * 1322 * We avoid dmi_check_system() / dmi_match(), because they use 1323 * substring matching. We don't want to affect the "701SD" 1324 * and "701SDX" models, because they do support S.H.E. 1325 */ 1326 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) { 1327 eeepc->cpufv_disabled = true; 1328 pr_info("model %s does not officially support setting cpu " 1329 "speed\n", model); 1330 pr_info("cpufv disabled to avoid instability\n"); 1331 } 1332 1333 /* 1334 * Blacklist for wlan hotplug 1335 * 1336 * Eeepc 1005HA doesn't work like others models and don't need the 1337 * hotplug code. In fact, current hotplug code seems to unplug another 1338 * device... 1339 */ 1340 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 || 1341 strcmp(model, "1005PE") == 0) { 1342 eeepc->hotplug_disabled = true; 1343 pr_info("wlan hotplug disabled\n"); 1344 } 1345 } 1346 1347 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name) 1348 { 1349 int dummy; 1350 1351 /* Some BIOSes do not report cm although it is available. 1352 Check if cm_getv[cm] works and, if yes, assume cm should be set. */ 1353 if (!(eeepc->cm_supported & (1 << cm)) 1354 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) { 1355 pr_info("%s (%x) not reported by BIOS," 1356 " enabling anyway\n", name, 1 << cm); 1357 eeepc->cm_supported |= 1 << cm; 1358 } 1359 } 1360 1361 static void cmsg_quirks(struct eeepc_laptop *eeepc) 1362 { 1363 cmsg_quirk(eeepc, CM_ASL_LID, "LID"); 1364 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE"); 1365 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER"); 1366 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD"); 1367 } 1368 1369 static int eeepc_acpi_init(struct eeepc_laptop *eeepc) 1370 { 1371 unsigned int init_flags; 1372 int result; 1373 1374 result = acpi_bus_get_status(eeepc->device); 1375 if (result) 1376 return result; 1377 if (!eeepc->device->status.present) { 1378 pr_err("Hotkey device not present, aborting\n"); 1379 return -ENODEV; 1380 } 1381 1382 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH; 1383 pr_notice("Hotkey init flags 0x%x\n", init_flags); 1384 1385 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) { 1386 pr_err("Hotkey initialization failed\n"); 1387 return -ENODEV; 1388 } 1389 1390 /* get control methods supported */ 1391 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) { 1392 pr_err("Get control methods supported failed\n"); 1393 return -ENODEV; 1394 } 1395 cmsg_quirks(eeepc); 1396 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported); 1397 1398 return 0; 1399 } 1400 1401 static void eeepc_enable_camera(struct eeepc_laptop *eeepc) 1402 { 1403 /* 1404 * If the following call to set_acpi() fails, it's because there's no 1405 * camera so we can ignore the error. 1406 */ 1407 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0) 1408 set_acpi(eeepc, CM_ASL_CAMERA, 1); 1409 } 1410 1411 static bool eeepc_device_present; 1412 1413 static int eeepc_acpi_add(struct acpi_device *device) 1414 { 1415 struct eeepc_laptop *eeepc; 1416 int result; 1417 1418 pr_notice(EEEPC_LAPTOP_NAME "\n"); 1419 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL); 1420 if (!eeepc) 1421 return -ENOMEM; 1422 eeepc->handle = device->handle; 1423 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME); 1424 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS); 1425 device->driver_data = eeepc; 1426 eeepc->device = device; 1427 1428 eeepc->hotplug_disabled = hotplug_disabled; 1429 1430 eeepc_dmi_check(eeepc); 1431 1432 result = eeepc_acpi_init(eeepc); 1433 if (result) 1434 goto fail_platform; 1435 eeepc_enable_camera(eeepc); 1436 1437 /* 1438 * Register the platform device first. It is used as a parent for the 1439 * sub-devices below. 1440 * 1441 * Note that if there are multiple instances of this ACPI device it 1442 * will bail out, because the platform device is registered with a 1443 * fixed name. Of course it doesn't make sense to have more than one, 1444 * and machine-specific scripts find the fixed name convenient. But 1445 * It's also good for us to exclude multiple instances because both 1446 * our hwmon and our wlan rfkill subdevice use global ACPI objects 1447 * (the EC and the wlan PCI slot respectively). 1448 */ 1449 result = eeepc_platform_init(eeepc); 1450 if (result) 1451 goto fail_platform; 1452 1453 if (!acpi_video_backlight_support()) { 1454 result = eeepc_backlight_init(eeepc); 1455 if (result) 1456 goto fail_backlight; 1457 } else 1458 pr_info("Backlight controlled by ACPI video driver\n"); 1459 1460 result = eeepc_input_init(eeepc); 1461 if (result) 1462 goto fail_input; 1463 1464 result = eeepc_hwmon_init(eeepc); 1465 if (result) 1466 goto fail_hwmon; 1467 1468 result = eeepc_led_init(eeepc); 1469 if (result) 1470 goto fail_led; 1471 1472 result = eeepc_rfkill_init(eeepc); 1473 if (result) 1474 goto fail_rfkill; 1475 1476 eeepc_device_present = true; 1477 return 0; 1478 1479 fail_rfkill: 1480 eeepc_led_exit(eeepc); 1481 fail_led: 1482 eeepc_hwmon_exit(eeepc); 1483 fail_hwmon: 1484 eeepc_input_exit(eeepc); 1485 fail_input: 1486 eeepc_backlight_exit(eeepc); 1487 fail_backlight: 1488 eeepc_platform_exit(eeepc); 1489 fail_platform: 1490 kfree(eeepc); 1491 1492 return result; 1493 } 1494 1495 static int eeepc_acpi_remove(struct acpi_device *device) 1496 { 1497 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1498 1499 eeepc_backlight_exit(eeepc); 1500 eeepc_rfkill_exit(eeepc); 1501 eeepc_input_exit(eeepc); 1502 eeepc_hwmon_exit(eeepc); 1503 eeepc_led_exit(eeepc); 1504 eeepc_platform_exit(eeepc); 1505 1506 kfree(eeepc); 1507 return 0; 1508 } 1509 1510 1511 static const struct acpi_device_id eeepc_device_ids[] = { 1512 {EEEPC_ACPI_HID, 0}, 1513 {"", 0}, 1514 }; 1515 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids); 1516 1517 static struct acpi_driver eeepc_acpi_driver = { 1518 .name = EEEPC_LAPTOP_NAME, 1519 .class = EEEPC_ACPI_CLASS, 1520 .owner = THIS_MODULE, 1521 .ids = eeepc_device_ids, 1522 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS, 1523 .ops = { 1524 .add = eeepc_acpi_add, 1525 .remove = eeepc_acpi_remove, 1526 .notify = eeepc_acpi_notify, 1527 }, 1528 }; 1529 1530 1531 static int __init eeepc_laptop_init(void) 1532 { 1533 int result; 1534 1535 result = platform_driver_register(&platform_driver); 1536 if (result < 0) 1537 return result; 1538 1539 result = acpi_bus_register_driver(&eeepc_acpi_driver); 1540 if (result < 0) 1541 goto fail_acpi_driver; 1542 1543 if (!eeepc_device_present) { 1544 result = -ENODEV; 1545 goto fail_no_device; 1546 } 1547 1548 return 0; 1549 1550 fail_no_device: 1551 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1552 fail_acpi_driver: 1553 platform_driver_unregister(&platform_driver); 1554 return result; 1555 } 1556 1557 static void __exit eeepc_laptop_exit(void) 1558 { 1559 acpi_bus_unregister_driver(&eeepc_acpi_driver); 1560 platform_driver_unregister(&platform_driver); 1561 } 1562 1563 module_init(eeepc_laptop_init); 1564 module_exit(eeepc_laptop_exit); 1565