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 struct acpi_object_list params; 194 union acpi_object in_obj; 195 acpi_status status; 196 197 params.count = 1; 198 params.pointer = &in_obj; 199 in_obj.type = ACPI_TYPE_INTEGER; 200 in_obj.integer.value = val; 201 202 status = acpi_evaluate_object(handle, (char *)method, ¶ms, NULL); 203 return (status == AE_OK ? 0 : -1); 204 } 205 206 static int read_acpi_int(acpi_handle handle, const char *method, int *val) 207 { 208 acpi_status status; 209 unsigned long long result; 210 211 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result); 212 if (ACPI_FAILURE(status)) { 213 *val = -1; 214 return -1; 215 } else { 216 *val = result; 217 return 0; 218 } 219 } 220 221 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value) 222 { 223 const char *method = cm_setv[cm]; 224 225 if (method == NULL) 226 return -ENODEV; 227 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 228 return -ENODEV; 229 230 if (write_acpi_int(eeepc->handle, method, value)) 231 pr_warn("Error writing %s\n", method); 232 return 0; 233 } 234 235 static int get_acpi(struct eeepc_laptop *eeepc, int cm) 236 { 237 const char *method = cm_getv[cm]; 238 int value; 239 240 if (method == NULL) 241 return -ENODEV; 242 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 243 return -ENODEV; 244 245 if (read_acpi_int(eeepc->handle, method, &value)) 246 pr_warn("Error reading %s\n", method); 247 return value; 248 } 249 250 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm, 251 acpi_handle *handle) 252 { 253 const char *method = cm_setv[cm]; 254 acpi_status status; 255 256 if (method == NULL) 257 return -ENODEV; 258 if ((eeepc->cm_supported & (0x1 << cm)) == 0) 259 return -ENODEV; 260 261 status = acpi_get_handle(eeepc->handle, (char *)method, 262 handle); 263 if (status != AE_OK) { 264 pr_warn("Error finding %s\n", method); 265 return -ENODEV; 266 } 267 return 0; 268 } 269 270 271 /* 272 * Sys helpers 273 */ 274 static int parse_arg(const char *buf, unsigned long count, int *val) 275 { 276 if (!count) 277 return 0; 278 if (sscanf(buf, "%i", val) != 1) 279 return -EINVAL; 280 return count; 281 } 282 283 static ssize_t store_sys_acpi(struct device *dev, int cm, 284 const char *buf, size_t count) 285 { 286 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 287 int rv, value; 288 289 rv = parse_arg(buf, count, &value); 290 if (rv > 0) 291 value = set_acpi(eeepc, cm, value); 292 if (value < 0) 293 return -EIO; 294 return rv; 295 } 296 297 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf) 298 { 299 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 300 int value = get_acpi(eeepc, cm); 301 302 if (value < 0) 303 return -EIO; 304 return sprintf(buf, "%d\n", value); 305 } 306 307 #define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm) \ 308 static ssize_t show_##_name(struct device *dev, \ 309 struct device_attribute *attr, \ 310 char *buf) \ 311 { \ 312 return show_sys_acpi(dev, _cm, buf); \ 313 } \ 314 static ssize_t store_##_name(struct device *dev, \ 315 struct device_attribute *attr, \ 316 const char *buf, size_t count) \ 317 { \ 318 return store_sys_acpi(dev, _cm, buf, count); \ 319 } \ 320 static struct device_attribute dev_attr_##_name = { \ 321 .attr = { \ 322 .name = __stringify(_name), \ 323 .mode = _mode }, \ 324 .show = show_##_name, \ 325 .store = store_##_name, \ 326 } 327 328 EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA); 329 EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER); 330 EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH); 331 332 struct eeepc_cpufv { 333 int num; 334 int cur; 335 }; 336 337 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c) 338 { 339 c->cur = get_acpi(eeepc, CM_ASL_CPUFV); 340 c->num = (c->cur >> 8) & 0xff; 341 c->cur &= 0xff; 342 if (c->cur < 0 || c->num <= 0 || c->num > 12) 343 return -ENODEV; 344 return 0; 345 } 346 347 static ssize_t show_available_cpufv(struct device *dev, 348 struct device_attribute *attr, 349 char *buf) 350 { 351 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 352 struct eeepc_cpufv c; 353 int i; 354 ssize_t len = 0; 355 356 if (get_cpufv(eeepc, &c)) 357 return -ENODEV; 358 for (i = 0; i < c.num; i++) 359 len += sprintf(buf + len, "%d ", i); 360 len += sprintf(buf + len, "\n"); 361 return len; 362 } 363 364 static ssize_t show_cpufv(struct device *dev, 365 struct device_attribute *attr, 366 char *buf) 367 { 368 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 369 struct eeepc_cpufv c; 370 371 if (get_cpufv(eeepc, &c)) 372 return -ENODEV; 373 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur); 374 } 375 376 static ssize_t store_cpufv(struct device *dev, 377 struct device_attribute *attr, 378 const char *buf, size_t count) 379 { 380 struct eeepc_laptop *eeepc = dev_get_drvdata(dev); 381 struct eeepc_cpufv c; 382 int rv, value; 383 384 if (eeepc->cpufv_disabled) 385 return -EPERM; 386 if (get_cpufv(eeepc, &c)) 387 return -ENODEV; 388 rv = parse_arg(buf, count, &value); 389 if (rv < 0) 390 return rv; 391 if (!rv || value < 0 || value >= c.num) 392 return -EINVAL; 393 set_acpi(eeepc, CM_ASL_CPUFV, value); 394 return rv; 395 } 396 397 static ssize_t show_cpufv_disabled(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 } 405 406 static ssize_t store_cpufv_disabled(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, count, &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 rv; 424 case 1: 425 return -EPERM; 426 default: 427 return -EINVAL; 428 } 429 } 430 431 432 static struct device_attribute dev_attr_cpufv = { 433 .attr = { 434 .name = "cpufv", 435 .mode = 0644 }, 436 .show = show_cpufv, 437 .store = store_cpufv 438 }; 439 440 static struct device_attribute dev_attr_available_cpufv = { 441 .attr = { 442 .name = "available_cpufv", 443 .mode = 0444 }, 444 .show = show_available_cpufv 445 }; 446 447 static struct device_attribute dev_attr_cpufv_disabled = { 448 .attr = { 449 .name = "cpufv_disabled", 450 .mode = 0644 }, 451 .show = show_cpufv_disabled, 452 .store = store_cpufv_disabled 453 }; 454 455 456 static struct attribute *platform_attributes[] = { 457 &dev_attr_camera.attr, 458 &dev_attr_cardr.attr, 459 &dev_attr_disp.attr, 460 &dev_attr_cpufv.attr, 461 &dev_attr_available_cpufv.attr, 462 &dev_attr_cpufv_disabled.attr, 463 NULL 464 }; 465 466 static struct attribute_group platform_attribute_group = { 467 .attrs = platform_attributes 468 }; 469 470 static int eeepc_platform_init(struct eeepc_laptop *eeepc) 471 { 472 int result; 473 474 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1); 475 if (!eeepc->platform_device) 476 return -ENOMEM; 477 platform_set_drvdata(eeepc->platform_device, eeepc); 478 479 result = platform_device_add(eeepc->platform_device); 480 if (result) 481 goto fail_platform_device; 482 483 result = sysfs_create_group(&eeepc->platform_device->dev.kobj, 484 &platform_attribute_group); 485 if (result) 486 goto fail_sysfs; 487 return 0; 488 489 fail_sysfs: 490 platform_device_del(eeepc->platform_device); 491 fail_platform_device: 492 platform_device_put(eeepc->platform_device); 493 return result; 494 } 495 496 static void eeepc_platform_exit(struct eeepc_laptop *eeepc) 497 { 498 sysfs_remove_group(&eeepc->platform_device->dev.kobj, 499 &platform_attribute_group); 500 platform_device_unregister(eeepc->platform_device); 501 } 502 503 /* 504 * LEDs 505 */ 506 /* 507 * These functions actually update the LED's, and are called from a 508 * workqueue. By doing this as separate work rather than when the LED 509 * subsystem asks, we avoid messing with the Asus ACPI stuff during a 510 * potentially bad time, such as a timer interrupt. 511 */ 512 static void tpd_led_update(struct work_struct *work) 513 { 514 struct eeepc_laptop *eeepc; 515 516 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work); 517 518 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk); 519 } 520 521 static void tpd_led_set(struct led_classdev *led_cdev, 522 enum led_brightness value) 523 { 524 struct eeepc_laptop *eeepc; 525 526 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 527 528 eeepc->tpd_led_wk = (value > 0) ? 1 : 0; 529 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work); 530 } 531 532 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev) 533 { 534 struct eeepc_laptop *eeepc; 535 536 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led); 537 538 return get_acpi(eeepc, CM_ASL_TPD); 539 } 540 541 static int eeepc_led_init(struct eeepc_laptop *eeepc) 542 { 543 int rv; 544 545 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV) 546 return 0; 547 548 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue"); 549 if (!eeepc->led_workqueue) 550 return -ENOMEM; 551 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update); 552 553 eeepc->tpd_led.name = "eeepc::touchpad"; 554 eeepc->tpd_led.brightness_set = tpd_led_set; 555 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */ 556 eeepc->tpd_led.brightness_get = tpd_led_get; 557 eeepc->tpd_led.max_brightness = 1; 558 559 rv = led_classdev_register(&eeepc->platform_device->dev, 560 &eeepc->tpd_led); 561 if (rv) { 562 destroy_workqueue(eeepc->led_workqueue); 563 return rv; 564 } 565 566 return 0; 567 } 568 569 static void eeepc_led_exit(struct eeepc_laptop *eeepc) 570 { 571 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev)) 572 led_classdev_unregister(&eeepc->tpd_led); 573 if (eeepc->led_workqueue) 574 destroy_workqueue(eeepc->led_workqueue); 575 } 576 577 578 /* 579 * PCI hotplug (for wlan rfkill) 580 */ 581 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc) 582 { 583 if (get_acpi(eeepc, CM_ASL_WLAN) == 1) 584 return false; 585 return true; 586 } 587 588 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle) 589 { 590 struct pci_dev *port; 591 struct pci_dev *dev; 592 struct pci_bus *bus; 593 bool blocked = eeepc_wlan_rfkill_blocked(eeepc); 594 bool absent; 595 u32 l; 596 597 if (eeepc->wlan_rfkill) 598 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked); 599 600 mutex_lock(&eeepc->hotplug_lock); 601 602 if (eeepc->hotplug_slot) { 603 port = acpi_get_pci_dev(handle); 604 if (!port) { 605 pr_warning("Unable to find port\n"); 606 goto out_unlock; 607 } 608 609 bus = port->subordinate; 610 611 if (!bus) { 612 pr_warn("Unable to find PCI bus 1?\n"); 613 goto out_unlock; 614 } 615 616 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) { 617 pr_err("Unable to read PCI config space?\n"); 618 goto out_unlock; 619 } 620 621 absent = (l == 0xffffffff); 622 623 if (blocked != absent) { 624 pr_warn("BIOS says wireless lan is %s, " 625 "but the pci device is %s\n", 626 blocked ? "blocked" : "unblocked", 627 absent ? "absent" : "present"); 628 pr_warn("skipped wireless hotplug as probably " 629 "inappropriate for this model\n"); 630 goto out_unlock; 631 } 632 633 if (!blocked) { 634 dev = pci_get_slot(bus, 0); 635 if (dev) { 636 /* Device already present */ 637 pci_dev_put(dev); 638 goto out_unlock; 639 } 640 dev = pci_scan_single_device(bus, 0); 641 if (dev) { 642 pci_bus_assign_resources(bus); 643 if (pci_bus_add_device(dev)) 644 pr_err("Unable to hotplug wifi\n"); 645 } 646 } else { 647 dev = pci_get_slot(bus, 0); 648 if (dev) { 649 pci_remove_bus_device(dev); 650 pci_dev_put(dev); 651 } 652 } 653 } 654 655 out_unlock: 656 mutex_unlock(&eeepc->hotplug_lock); 657 } 658 659 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node) 660 { 661 acpi_status status = AE_OK; 662 acpi_handle handle; 663 664 status = acpi_get_handle(NULL, node, &handle); 665 666 if (ACPI_SUCCESS(status)) 667 eeepc_rfkill_hotplug(eeepc, handle); 668 } 669 670 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data) 671 { 672 struct eeepc_laptop *eeepc = data; 673 674 if (event != ACPI_NOTIFY_BUS_CHECK) 675 return; 676 677 eeepc_rfkill_hotplug(eeepc, handle); 678 } 679 680 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc, 681 char *node) 682 { 683 acpi_status status; 684 acpi_handle handle; 685 686 status = acpi_get_handle(NULL, node, &handle); 687 688 if (ACPI_SUCCESS(status)) { 689 status = acpi_install_notify_handler(handle, 690 ACPI_SYSTEM_NOTIFY, 691 eeepc_rfkill_notify, 692 eeepc); 693 if (ACPI_FAILURE(status)) 694 pr_warn("Failed to register notify on %s\n", node); 695 696 /* 697 * Refresh pci hotplug in case the rfkill state was 698 * changed during setup. 699 */ 700 eeepc_rfkill_hotplug(eeepc, handle); 701 } else 702 return -ENODEV; 703 704 return 0; 705 } 706 707 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc, 708 char *node) 709 { 710 acpi_status status = AE_OK; 711 acpi_handle handle; 712 713 status = acpi_get_handle(NULL, node, &handle); 714 715 if (ACPI_SUCCESS(status)) { 716 status = acpi_remove_notify_handler(handle, 717 ACPI_SYSTEM_NOTIFY, 718 eeepc_rfkill_notify); 719 if (ACPI_FAILURE(status)) 720 pr_err("Error removing rfkill notify handler %s\n", 721 node); 722 /* 723 * Refresh pci hotplug in case the rfkill 724 * state was changed after 725 * eeepc_unregister_rfkill_notifier() 726 */ 727 eeepc_rfkill_hotplug(eeepc, handle); 728 } 729 } 730 731 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot, 732 u8 *value) 733 { 734 struct eeepc_laptop *eeepc = hotplug_slot->private; 735 int val = get_acpi(eeepc, CM_ASL_WLAN); 736 737 if (val == 1 || val == 0) 738 *value = val; 739 else 740 return -EINVAL; 741 742 return 0; 743 } 744 745 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot) 746 { 747 kfree(hotplug_slot->info); 748 kfree(hotplug_slot); 749 } 750 751 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = { 752 .owner = THIS_MODULE, 753 .get_adapter_status = eeepc_get_adapter_status, 754 .get_power_status = eeepc_get_adapter_status, 755 }; 756 757 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc) 758 { 759 int ret = -ENOMEM; 760 struct pci_bus *bus = pci_find_bus(0, 1); 761 762 if (!bus) { 763 pr_err("Unable to find wifi PCI bus\n"); 764 return -ENODEV; 765 } 766 767 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL); 768 if (!eeepc->hotplug_slot) 769 goto error_slot; 770 771 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info), 772 GFP_KERNEL); 773 if (!eeepc->hotplug_slot->info) 774 goto error_info; 775 776 eeepc->hotplug_slot->private = eeepc; 777 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug; 778 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops; 779 eeepc_get_adapter_status(eeepc->hotplug_slot, 780 &eeepc->hotplug_slot->info->adapter_status); 781 782 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi"); 783 if (ret) { 784 pr_err("Unable to register hotplug slot - %d\n", ret); 785 goto error_register; 786 } 787 788 return 0; 789 790 error_register: 791 kfree(eeepc->hotplug_slot->info); 792 error_info: 793 kfree(eeepc->hotplug_slot); 794 eeepc->hotplug_slot = NULL; 795 error_slot: 796 return ret; 797 } 798 799 /* 800 * Rfkill devices 801 */ 802 static int eeepc_rfkill_set(void *data, bool blocked) 803 { 804 acpi_handle handle = data; 805 806 return write_acpi_int(handle, NULL, !blocked); 807 } 808 809 static const struct rfkill_ops eeepc_rfkill_ops = { 810 .set_block = eeepc_rfkill_set, 811 }; 812 813 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc, 814 struct rfkill **rfkill, 815 const char *name, 816 enum rfkill_type type, int cm) 817 { 818 acpi_handle handle; 819 int result; 820 821 result = acpi_setter_handle(eeepc, cm, &handle); 822 if (result < 0) 823 return result; 824 825 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type, 826 &eeepc_rfkill_ops, handle); 827 828 if (!*rfkill) 829 return -EINVAL; 830 831 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1); 832 result = rfkill_register(*rfkill); 833 if (result) { 834 rfkill_destroy(*rfkill); 835 *rfkill = NULL; 836 return result; 837 } 838 return 0; 839 } 840 841 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc) 842 { 843 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 844 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 845 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 846 if (eeepc->wlan_rfkill) { 847 rfkill_unregister(eeepc->wlan_rfkill); 848 rfkill_destroy(eeepc->wlan_rfkill); 849 eeepc->wlan_rfkill = NULL; 850 } 851 852 if (eeepc->hotplug_slot) 853 pci_hp_deregister(eeepc->hotplug_slot); 854 855 if (eeepc->bluetooth_rfkill) { 856 rfkill_unregister(eeepc->bluetooth_rfkill); 857 rfkill_destroy(eeepc->bluetooth_rfkill); 858 eeepc->bluetooth_rfkill = NULL; 859 } 860 if (eeepc->wwan3g_rfkill) { 861 rfkill_unregister(eeepc->wwan3g_rfkill); 862 rfkill_destroy(eeepc->wwan3g_rfkill); 863 eeepc->wwan3g_rfkill = NULL; 864 } 865 if (eeepc->wimax_rfkill) { 866 rfkill_unregister(eeepc->wimax_rfkill); 867 rfkill_destroy(eeepc->wimax_rfkill); 868 eeepc->wimax_rfkill = NULL; 869 } 870 } 871 872 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc) 873 { 874 int result = 0; 875 876 mutex_init(&eeepc->hotplug_lock); 877 878 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill, 879 "eeepc-wlan", RFKILL_TYPE_WLAN, 880 CM_ASL_WLAN); 881 882 if (result && result != -ENODEV) 883 goto exit; 884 885 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill, 886 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH, 887 CM_ASL_BLUETOOTH); 888 889 if (result && result != -ENODEV) 890 goto exit; 891 892 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill, 893 "eeepc-wwan3g", RFKILL_TYPE_WWAN, 894 CM_ASL_3G); 895 896 if (result && result != -ENODEV) 897 goto exit; 898 899 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill, 900 "eeepc-wimax", RFKILL_TYPE_WIMAX, 901 CM_ASL_WIMAX); 902 903 if (result && result != -ENODEV) 904 goto exit; 905 906 if (eeepc->hotplug_disabled) 907 return 0; 908 909 result = eeepc_setup_pci_hotplug(eeepc); 910 /* 911 * If we get -EBUSY then something else is handling the PCI hotplug - 912 * don't fail in this case 913 */ 914 if (result == -EBUSY) 915 result = 0; 916 917 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5"); 918 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6"); 919 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7"); 920 921 exit: 922 if (result && result != -ENODEV) 923 eeepc_rfkill_exit(eeepc); 924 return result; 925 } 926 927 /* 928 * Platform driver - hibernate/resume callbacks 929 */ 930 static int eeepc_hotk_thaw(struct device *device) 931 { 932 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 933 934 if (eeepc->wlan_rfkill) { 935 bool wlan; 936 937 /* 938 * Work around bios bug - acpi _PTS turns off the wireless led 939 * during suspend. Normally it restores it on resume, but 940 * we should kick it ourselves in case hibernation is aborted. 941 */ 942 wlan = get_acpi(eeepc, CM_ASL_WLAN); 943 set_acpi(eeepc, CM_ASL_WLAN, wlan); 944 } 945 946 return 0; 947 } 948 949 static int eeepc_hotk_restore(struct device *device) 950 { 951 struct eeepc_laptop *eeepc = dev_get_drvdata(device); 952 953 /* Refresh both wlan rfkill state and pci hotplug */ 954 if (eeepc->wlan_rfkill) { 955 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P5"); 956 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P6"); 957 eeepc_rfkill_hotplug_update(eeepc, "\\_SB.PCI0.P0P7"); 958 } 959 960 if (eeepc->bluetooth_rfkill) 961 rfkill_set_sw_state(eeepc->bluetooth_rfkill, 962 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1); 963 if (eeepc->wwan3g_rfkill) 964 rfkill_set_sw_state(eeepc->wwan3g_rfkill, 965 get_acpi(eeepc, CM_ASL_3G) != 1); 966 if (eeepc->wimax_rfkill) 967 rfkill_set_sw_state(eeepc->wimax_rfkill, 968 get_acpi(eeepc, CM_ASL_WIMAX) != 1); 969 970 return 0; 971 } 972 973 static const struct dev_pm_ops eeepc_pm_ops = { 974 .thaw = eeepc_hotk_thaw, 975 .restore = eeepc_hotk_restore, 976 }; 977 978 static struct platform_driver platform_driver = { 979 .driver = { 980 .name = EEEPC_LAPTOP_FILE, 981 .owner = THIS_MODULE, 982 .pm = &eeepc_pm_ops, 983 } 984 }; 985 986 /* 987 * Hwmon device 988 */ 989 990 #define EEEPC_EC_SC00 0x61 991 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */ 992 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */ 993 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */ 994 995 #define EEEPC_EC_SFB0 0xD0 996 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */ 997 998 static int eeepc_get_fan_pwm(void) 999 { 1000 u8 value = 0; 1001 1002 ec_read(EEEPC_EC_FAN_PWM, &value); 1003 return value * 255 / 100; 1004 } 1005 1006 static void eeepc_set_fan_pwm(int value) 1007 { 1008 value = SENSORS_LIMIT(value, 0, 255); 1009 value = value * 100 / 255; 1010 ec_write(EEEPC_EC_FAN_PWM, value); 1011 } 1012 1013 static int eeepc_get_fan_rpm(void) 1014 { 1015 u8 high = 0; 1016 u8 low = 0; 1017 1018 ec_read(EEEPC_EC_FAN_HRPM, &high); 1019 ec_read(EEEPC_EC_FAN_LRPM, &low); 1020 return high << 8 | low; 1021 } 1022 1023 static int eeepc_get_fan_ctrl(void) 1024 { 1025 u8 value = 0; 1026 1027 ec_read(EEEPC_EC_FAN_CTRL, &value); 1028 if (value & 0x02) 1029 return 1; /* manual */ 1030 else 1031 return 2; /* automatic */ 1032 } 1033 1034 static void eeepc_set_fan_ctrl(int manual) 1035 { 1036 u8 value = 0; 1037 1038 ec_read(EEEPC_EC_FAN_CTRL, &value); 1039 if (manual == 1) 1040 value |= 0x02; 1041 else 1042 value &= ~0x02; 1043 ec_write(EEEPC_EC_FAN_CTRL, value); 1044 } 1045 1046 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count) 1047 { 1048 int rv, value; 1049 1050 rv = parse_arg(buf, count, &value); 1051 if (rv > 0) 1052 set(value); 1053 return rv; 1054 } 1055 1056 static ssize_t show_sys_hwmon(int (*get)(void), char *buf) 1057 { 1058 return sprintf(buf, "%d\n", get()); 1059 } 1060 1061 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \ 1062 static ssize_t show_##_name(struct device *dev, \ 1063 struct device_attribute *attr, \ 1064 char *buf) \ 1065 { \ 1066 return show_sys_hwmon(_set, buf); \ 1067 } \ 1068 static ssize_t store_##_name(struct device *dev, \ 1069 struct device_attribute *attr, \ 1070 const char *buf, size_t count) \ 1071 { \ 1072 return store_sys_hwmon(_get, buf, count); \ 1073 } \ 1074 static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0); 1075 1076 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL); 1077 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR, 1078 eeepc_get_fan_pwm, eeepc_set_fan_pwm); 1079 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR, 1080 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl); 1081 1082 static ssize_t 1083 show_name(struct device *dev, struct device_attribute *attr, char *buf) 1084 { 1085 return sprintf(buf, "eeepc\n"); 1086 } 1087 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0); 1088 1089 static struct attribute *hwmon_attributes[] = { 1090 &sensor_dev_attr_pwm1.dev_attr.attr, 1091 &sensor_dev_attr_fan1_input.dev_attr.attr, 1092 &sensor_dev_attr_pwm1_enable.dev_attr.attr, 1093 &sensor_dev_attr_name.dev_attr.attr, 1094 NULL 1095 }; 1096 1097 static struct attribute_group hwmon_attribute_group = { 1098 .attrs = hwmon_attributes 1099 }; 1100 1101 static void eeepc_hwmon_exit(struct eeepc_laptop *eeepc) 1102 { 1103 struct device *hwmon; 1104 1105 hwmon = eeepc->hwmon_device; 1106 if (!hwmon) 1107 return; 1108 sysfs_remove_group(&hwmon->kobj, 1109 &hwmon_attribute_group); 1110 hwmon_device_unregister(hwmon); 1111 eeepc->hwmon_device = NULL; 1112 } 1113 1114 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc) 1115 { 1116 struct device *hwmon; 1117 int result; 1118 1119 hwmon = hwmon_device_register(&eeepc->platform_device->dev); 1120 if (IS_ERR(hwmon)) { 1121 pr_err("Could not register eeepc hwmon device\n"); 1122 eeepc->hwmon_device = NULL; 1123 return PTR_ERR(hwmon); 1124 } 1125 eeepc->hwmon_device = hwmon; 1126 result = sysfs_create_group(&hwmon->kobj, 1127 &hwmon_attribute_group); 1128 if (result) 1129 eeepc_hwmon_exit(eeepc); 1130 return result; 1131 } 1132 1133 /* 1134 * Backlight device 1135 */ 1136 static int read_brightness(struct backlight_device *bd) 1137 { 1138 struct eeepc_laptop *eeepc = bl_get_data(bd); 1139 1140 return get_acpi(eeepc, CM_ASL_PANELBRIGHT); 1141 } 1142 1143 static int set_brightness(struct backlight_device *bd, int value) 1144 { 1145 struct eeepc_laptop *eeepc = bl_get_data(bd); 1146 1147 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value); 1148 } 1149 1150 static int update_bl_status(struct backlight_device *bd) 1151 { 1152 return set_brightness(bd, bd->props.brightness); 1153 } 1154 1155 static const struct backlight_ops eeepcbl_ops = { 1156 .get_brightness = read_brightness, 1157 .update_status = update_bl_status, 1158 }; 1159 1160 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc) 1161 { 1162 struct backlight_device *bd = eeepc->backlight_device; 1163 int old = bd->props.brightness; 1164 1165 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY); 1166 1167 return old; 1168 } 1169 1170 static int eeepc_backlight_init(struct eeepc_laptop *eeepc) 1171 { 1172 struct backlight_properties props; 1173 struct backlight_device *bd; 1174 1175 memset(&props, 0, sizeof(struct backlight_properties)); 1176 props.type = BACKLIGHT_PLATFORM; 1177 props.max_brightness = 15; 1178 bd = backlight_device_register(EEEPC_LAPTOP_FILE, 1179 &eeepc->platform_device->dev, eeepc, 1180 &eeepcbl_ops, &props); 1181 if (IS_ERR(bd)) { 1182 pr_err("Could not register eeepc backlight device\n"); 1183 eeepc->backlight_device = NULL; 1184 return PTR_ERR(bd); 1185 } 1186 eeepc->backlight_device = bd; 1187 bd->props.brightness = read_brightness(bd); 1188 bd->props.power = FB_BLANK_UNBLANK; 1189 backlight_update_status(bd); 1190 return 0; 1191 } 1192 1193 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc) 1194 { 1195 if (eeepc->backlight_device) 1196 backlight_device_unregister(eeepc->backlight_device); 1197 eeepc->backlight_device = NULL; 1198 } 1199 1200 1201 /* 1202 * Input device (i.e. hotkeys) 1203 */ 1204 static int eeepc_input_init(struct eeepc_laptop *eeepc) 1205 { 1206 struct input_dev *input; 1207 int error; 1208 1209 input = input_allocate_device(); 1210 if (!input) { 1211 pr_info("Unable to allocate input device\n"); 1212 return -ENOMEM; 1213 } 1214 1215 input->name = "Asus EeePC extra buttons"; 1216 input->phys = EEEPC_LAPTOP_FILE "/input0"; 1217 input->id.bustype = BUS_HOST; 1218 input->dev.parent = &eeepc->platform_device->dev; 1219 1220 error = sparse_keymap_setup(input, eeepc_keymap, NULL); 1221 if (error) { 1222 pr_err("Unable to setup input device keymap\n"); 1223 goto err_free_dev; 1224 } 1225 1226 error = input_register_device(input); 1227 if (error) { 1228 pr_err("Unable to register input device\n"); 1229 goto err_free_keymap; 1230 } 1231 1232 eeepc->inputdev = input; 1233 return 0; 1234 1235 err_free_keymap: 1236 sparse_keymap_free(input); 1237 err_free_dev: 1238 input_free_device(input); 1239 return error; 1240 } 1241 1242 static void eeepc_input_exit(struct eeepc_laptop *eeepc) 1243 { 1244 if (eeepc->inputdev) { 1245 sparse_keymap_free(eeepc->inputdev); 1246 input_unregister_device(eeepc->inputdev); 1247 } 1248 eeepc->inputdev = NULL; 1249 } 1250 1251 /* 1252 * ACPI driver 1253 */ 1254 static void eeepc_acpi_notify(struct acpi_device *device, u32 event) 1255 { 1256 struct eeepc_laptop *eeepc = acpi_driver_data(device); 1257 u16 count; 1258 1259 if (event > ACPI_MAX_SYS_NOTIFY) 1260 return; 1261 count = eeepc->event_count[event % 128]++; 1262 acpi_bus_generate_proc_event(device, event, count); 1263 acpi_bus_generate_netlink_event(device->pnp.device_class, 1264 dev_name(&device->dev), event, 1265 count); 1266 1267 /* Brightness events are special */ 1268 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) { 1269 1270 /* Ignore them completely if the acpi video driver is used */ 1271 if (eeepc->backlight_device != NULL) { 1272 int old_brightness, new_brightness; 1273 1274 /* Update the backlight device. */ 1275 old_brightness = eeepc_backlight_notify(eeepc); 1276 1277 /* Convert event to keypress (obsolescent hack) */ 1278 new_brightness = event - NOTIFY_BRN_MIN; 1279 1280 if (new_brightness < old_brightness) { 1281 event = NOTIFY_BRN_MIN; /* brightness down */ 1282 } else if (new_brightness > old_brightness) { 1283 event = NOTIFY_BRN_MAX; /* brightness up */ 1284 } else { 1285 /* 1286 * no change in brightness - already at min/max, 1287 * event will be desired value (or else ignored) 1288 */ 1289 } 1290 sparse_keymap_report_event(eeepc->inputdev, event, 1291 1, true); 1292 } 1293 } else { 1294 /* Everything else is a bona-fide keypress event */ 1295 sparse_keymap_report_event(eeepc->inputdev, event, 1, true); 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 __devinit 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 __devinit 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 __devinit 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, int type) 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