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thinkpad-acpi: fix bluetooth/wwan resume
[deliverable/linux.git] / drivers / platform / x86 / eeepc-laptop.c
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 <acpi/acpi_drivers.h>
31 #include <acpi/acpi_bus.h>
32 #include <linux/uaccess.h>
33 #include <linux/input.h>
34 #include <linux/input/sparse-keymap.h>
35 #include <linux/rfkill.h>
36 #include <linux/pci.h>
37 #include <linux/pci_hotplug.h>
38 #include <linux/leds.h>
39 #include <linux/dmi.h>
40
41 #define EEEPC_LAPTOP_VERSION "0.1"
42 #define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver"
43 #define EEEPC_LAPTOP_FILE "eeepc"
44
45 #define EEEPC_ACPI_CLASS "hotkey"
46 #define EEEPC_ACPI_DEVICE_NAME "Hotkey"
47 #define EEEPC_ACPI_HID "ASUS010"
48
49 MODULE_AUTHOR("Corentin Chary, Eric Cooper");
50 MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
51 MODULE_LICENSE("GPL");
52
53 static bool hotplug_disabled;
54
55 module_param(hotplug_disabled, bool, 0644);
56 MODULE_PARM_DESC(hotplug_disabled,
57 "Disable hotplug for wireless device. "
58 "If your laptop need that, please report to "
59 "acpi4asus-user@lists.sourceforge.net.");
60
61 /*
62 * Definitions for Asus EeePC
63 */
64 #define NOTIFY_BRN_MIN 0x20
65 #define NOTIFY_BRN_MAX 0x2f
66
67 enum {
68 DISABLE_ASL_WLAN = 0x0001,
69 DISABLE_ASL_BLUETOOTH = 0x0002,
70 DISABLE_ASL_IRDA = 0x0004,
71 DISABLE_ASL_CAMERA = 0x0008,
72 DISABLE_ASL_TV = 0x0010,
73 DISABLE_ASL_GPS = 0x0020,
74 DISABLE_ASL_DISPLAYSWITCH = 0x0040,
75 DISABLE_ASL_MODEM = 0x0080,
76 DISABLE_ASL_CARDREADER = 0x0100,
77 DISABLE_ASL_3G = 0x0200,
78 DISABLE_ASL_WIMAX = 0x0400,
79 DISABLE_ASL_HWCF = 0x0800
80 };
81
82 enum {
83 CM_ASL_WLAN = 0,
84 CM_ASL_BLUETOOTH,
85 CM_ASL_IRDA,
86 CM_ASL_1394,
87 CM_ASL_CAMERA,
88 CM_ASL_TV,
89 CM_ASL_GPS,
90 CM_ASL_DVDROM,
91 CM_ASL_DISPLAYSWITCH,
92 CM_ASL_PANELBRIGHT,
93 CM_ASL_BIOSFLASH,
94 CM_ASL_ACPIFLASH,
95 CM_ASL_CPUFV,
96 CM_ASL_CPUTEMPERATURE,
97 CM_ASL_FANCPU,
98 CM_ASL_FANCHASSIS,
99 CM_ASL_USBPORT1,
100 CM_ASL_USBPORT2,
101 CM_ASL_USBPORT3,
102 CM_ASL_MODEM,
103 CM_ASL_CARDREADER,
104 CM_ASL_3G,
105 CM_ASL_WIMAX,
106 CM_ASL_HWCF,
107 CM_ASL_LID,
108 CM_ASL_TYPE,
109 CM_ASL_PANELPOWER, /*P901*/
110 CM_ASL_TPD
111 };
112
113 static const char *cm_getv[] = {
114 "WLDG", "BTHG", NULL, NULL,
115 "CAMG", NULL, NULL, NULL,
116 NULL, "PBLG", NULL, NULL,
117 "CFVG", NULL, NULL, NULL,
118 "USBG", NULL, NULL, "MODG",
119 "CRDG", "M3GG", "WIMG", "HWCF",
120 "LIDG", "TYPE", "PBPG", "TPDG"
121 };
122
123 static const char *cm_setv[] = {
124 "WLDS", "BTHS", NULL, NULL,
125 "CAMS", NULL, NULL, NULL,
126 "SDSP", "PBLS", "HDPS", NULL,
127 "CFVS", NULL, NULL, NULL,
128 "USBG", NULL, NULL, "MODS",
129 "CRDS", "M3GS", "WIMS", NULL,
130 NULL, NULL, "PBPS", "TPDS"
131 };
132
133 static const struct key_entry eeepc_keymap[] = {
134 { KE_KEY, 0x10, { KEY_WLAN } },
135 { KE_KEY, 0x11, { KEY_WLAN } },
136 { KE_KEY, 0x12, { KEY_PROG1 } },
137 { KE_KEY, 0x13, { KEY_MUTE } },
138 { KE_KEY, 0x14, { KEY_VOLUMEDOWN } },
139 { KE_KEY, 0x15, { KEY_VOLUMEUP } },
140 { KE_KEY, 0x16, { KEY_DISPLAY_OFF } },
141 { KE_KEY, 0x1a, { KEY_COFFEE } },
142 { KE_KEY, 0x1b, { KEY_ZOOM } },
143 { KE_KEY, 0x1c, { KEY_PROG2 } },
144 { KE_KEY, 0x1d, { KEY_PROG3 } },
145 { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } },
146 { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } },
147 { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
148 { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
149 { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
150 { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
151 { KE_KEY, 0x38, { KEY_F14 } },
152 { KE_END, 0 },
153 };
154
155 /*
156 * This is the main structure, we can use it to store useful information
157 */
158 struct eeepc_laptop {
159 acpi_handle handle; /* the handle of the acpi device */
160 u32 cm_supported; /* the control methods supported
161 by this BIOS */
162 bool cpufv_disabled;
163 bool hotplug_disabled;
164 u16 event_count[128]; /* count for each event */
165
166 struct platform_device *platform_device;
167 struct device *hwmon_device;
168 struct backlight_device *backlight_device;
169
170 struct input_dev *inputdev;
171 struct key_entry *keymap;
172
173 struct rfkill *wlan_rfkill;
174 struct rfkill *bluetooth_rfkill;
175 struct rfkill *wwan3g_rfkill;
176 struct rfkill *wimax_rfkill;
177
178 struct hotplug_slot *hotplug_slot;
179 struct mutex hotplug_lock;
180
181 struct led_classdev tpd_led;
182 int tpd_led_wk;
183 struct workqueue_struct *led_workqueue;
184 struct work_struct tpd_led_work;
185 };
186
187 /*
188 * ACPI Helpers
189 */
190 static int write_acpi_int(acpi_handle handle, const char *method, int val)
191 {
192 struct acpi_object_list params;
193 union acpi_object in_obj;
194 acpi_status status;
195
196 params.count = 1;
197 params.pointer = &in_obj;
198 in_obj.type = ACPI_TYPE_INTEGER;
199 in_obj.integer.value = val;
200
201 status = acpi_evaluate_object(handle, (char *)method, &params, NULL);
202 return (status == AE_OK ? 0 : -1);
203 }
204
205 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
206 {
207 acpi_status status;
208 unsigned long long result;
209
210 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
211 if (ACPI_FAILURE(status)) {
212 *val = -1;
213 return -1;
214 } else {
215 *val = result;
216 return 0;
217 }
218 }
219
220 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
221 {
222 const char *method = cm_setv[cm];
223
224 if (method == NULL)
225 return -ENODEV;
226 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
227 return -ENODEV;
228
229 if (write_acpi_int(eeepc->handle, method, value))
230 pr_warning("Error writing %s\n", method);
231 return 0;
232 }
233
234 static int get_acpi(struct eeepc_laptop *eeepc, int cm)
235 {
236 const char *method = cm_getv[cm];
237 int value;
238
239 if (method == NULL)
240 return -ENODEV;
241 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
242 return -ENODEV;
243
244 if (read_acpi_int(eeepc->handle, method, &value))
245 pr_warning("Error reading %s\n", method);
246 return value;
247 }
248
249 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
250 acpi_handle *handle)
251 {
252 const char *method = cm_setv[cm];
253 acpi_status status;
254
255 if (method == NULL)
256 return -ENODEV;
257 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
258 return -ENODEV;
259
260 status = acpi_get_handle(eeepc->handle, (char *)method,
261 handle);
262 if (status != AE_OK) {
263 pr_warning("Error finding %s\n", method);
264 return -ENODEV;
265 }
266 return 0;
267 }
268
269
270 /*
271 * Sys helpers
272 */
273 static int parse_arg(const char *buf, unsigned long count, int *val)
274 {
275 if (!count)
276 return 0;
277 if (sscanf(buf, "%i", val) != 1)
278 return -EINVAL;
279 return count;
280 }
281
282 static ssize_t store_sys_acpi(struct device *dev, int cm,
283 const char *buf, size_t count)
284 {
285 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
286 int rv, value;
287
288 rv = parse_arg(buf, count, &value);
289 if (rv > 0)
290 value = set_acpi(eeepc, cm, value);
291 if (value < 0)
292 return -EIO;
293 return rv;
294 }
295
296 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
297 {
298 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
299 int value = get_acpi(eeepc, cm);
300
301 if (value < 0)
302 return -EIO;
303 return sprintf(buf, "%d\n", value);
304 }
305
306 #define EEEPC_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
307 static ssize_t show_##_name(struct device *dev, \
308 struct device_attribute *attr, \
309 char *buf) \
310 { \
311 return show_sys_acpi(dev, _cm, buf); \
312 } \
313 static ssize_t store_##_name(struct device *dev, \
314 struct device_attribute *attr, \
315 const char *buf, size_t count) \
316 { \
317 return store_sys_acpi(dev, _cm, buf, count); \
318 } \
319 static struct device_attribute dev_attr_##_name = { \
320 .attr = { \
321 .name = __stringify(_name), \
322 .mode = _mode }, \
323 .show = show_##_name, \
324 .store = store_##_name, \
325 }
326
327 EEEPC_CREATE_DEVICE_ATTR(camera, 0644, CM_ASL_CAMERA);
328 EEEPC_CREATE_DEVICE_ATTR(cardr, 0644, CM_ASL_CARDREADER);
329 EEEPC_CREATE_DEVICE_ATTR(disp, 0200, CM_ASL_DISPLAYSWITCH);
330
331 struct eeepc_cpufv {
332 int num;
333 int cur;
334 };
335
336 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
337 {
338 c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
339 c->num = (c->cur >> 8) & 0xff;
340 c->cur &= 0xff;
341 if (c->cur < 0 || c->num <= 0 || c->num > 12)
342 return -ENODEV;
343 return 0;
344 }
345
346 static ssize_t show_available_cpufv(struct device *dev,
347 struct device_attribute *attr,
348 char *buf)
349 {
350 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
351 struct eeepc_cpufv c;
352 int i;
353 ssize_t len = 0;
354
355 if (get_cpufv(eeepc, &c))
356 return -ENODEV;
357 for (i = 0; i < c.num; i++)
358 len += sprintf(buf + len, "%d ", i);
359 len += sprintf(buf + len, "\n");
360 return len;
361 }
362
363 static ssize_t show_cpufv(struct device *dev,
364 struct device_attribute *attr,
365 char *buf)
366 {
367 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
368 struct eeepc_cpufv c;
369
370 if (get_cpufv(eeepc, &c))
371 return -ENODEV;
372 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
373 }
374
375 static ssize_t store_cpufv(struct device *dev,
376 struct device_attribute *attr,
377 const char *buf, size_t count)
378 {
379 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
380 struct eeepc_cpufv c;
381 int rv, value;
382
383 if (eeepc->cpufv_disabled)
384 return -EPERM;
385 if (get_cpufv(eeepc, &c))
386 return -ENODEV;
387 rv = parse_arg(buf, count, &value);
388 if (rv < 0)
389 return rv;
390 if (!rv || value < 0 || value >= c.num)
391 return -EINVAL;
392 set_acpi(eeepc, CM_ASL_CPUFV, value);
393 return rv;
394 }
395
396 static ssize_t show_cpufv_disabled(struct device *dev,
397 struct device_attribute *attr,
398 char *buf)
399 {
400 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
401
402 return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
403 }
404
405 static ssize_t store_cpufv_disabled(struct device *dev,
406 struct device_attribute *attr,
407 const char *buf, size_t count)
408 {
409 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
410 int rv, value;
411
412 rv = parse_arg(buf, count, &value);
413 if (rv < 0)
414 return rv;
415
416 switch (value) {
417 case 0:
418 if (eeepc->cpufv_disabled)
419 pr_warning("cpufv enabled (not officially supported "
420 "on this model)\n");
421 eeepc->cpufv_disabled = false;
422 return rv;
423 case 1:
424 return -EPERM;
425 default:
426 return -EINVAL;
427 }
428 }
429
430
431 static struct device_attribute dev_attr_cpufv = {
432 .attr = {
433 .name = "cpufv",
434 .mode = 0644 },
435 .show = show_cpufv,
436 .store = store_cpufv
437 };
438
439 static struct device_attribute dev_attr_available_cpufv = {
440 .attr = {
441 .name = "available_cpufv",
442 .mode = 0444 },
443 .show = show_available_cpufv
444 };
445
446 static struct device_attribute dev_attr_cpufv_disabled = {
447 .attr = {
448 .name = "cpufv_disabled",
449 .mode = 0644 },
450 .show = show_cpufv_disabled,
451 .store = store_cpufv_disabled
452 };
453
454
455 static struct attribute *platform_attributes[] = {
456 &dev_attr_camera.attr,
457 &dev_attr_cardr.attr,
458 &dev_attr_disp.attr,
459 &dev_attr_cpufv.attr,
460 &dev_attr_available_cpufv.attr,
461 &dev_attr_cpufv_disabled.attr,
462 NULL
463 };
464
465 static struct attribute_group platform_attribute_group = {
466 .attrs = platform_attributes
467 };
468
469 static int eeepc_platform_init(struct eeepc_laptop *eeepc)
470 {
471 int result;
472
473 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
474 if (!eeepc->platform_device)
475 return -ENOMEM;
476 platform_set_drvdata(eeepc->platform_device, eeepc);
477
478 result = platform_device_add(eeepc->platform_device);
479 if (result)
480 goto fail_platform_device;
481
482 result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
483 &platform_attribute_group);
484 if (result)
485 goto fail_sysfs;
486 return 0;
487
488 fail_sysfs:
489 platform_device_del(eeepc->platform_device);
490 fail_platform_device:
491 platform_device_put(eeepc->platform_device);
492 return result;
493 }
494
495 static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
496 {
497 sysfs_remove_group(&eeepc->platform_device->dev.kobj,
498 &platform_attribute_group);
499 platform_device_unregister(eeepc->platform_device);
500 }
501
502 /*
503 * LEDs
504 */
505 /*
506 * These functions actually update the LED's, and are called from a
507 * workqueue. By doing this as separate work rather than when the LED
508 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
509 * potentially bad time, such as a timer interrupt.
510 */
511 static void tpd_led_update(struct work_struct *work)
512 {
513 struct eeepc_laptop *eeepc;
514
515 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
516
517 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
518 }
519
520 static void tpd_led_set(struct led_classdev *led_cdev,
521 enum led_brightness value)
522 {
523 struct eeepc_laptop *eeepc;
524
525 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
526
527 eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
528 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
529 }
530
531 static int eeepc_led_init(struct eeepc_laptop *eeepc)
532 {
533 int rv;
534
535 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
536 return 0;
537
538 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
539 if (!eeepc->led_workqueue)
540 return -ENOMEM;
541 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
542
543 eeepc->tpd_led.name = "eeepc::touchpad";
544 eeepc->tpd_led.brightness_set = tpd_led_set;
545 eeepc->tpd_led.max_brightness = 1;
546
547 rv = led_classdev_register(&eeepc->platform_device->dev,
548 &eeepc->tpd_led);
549 if (rv) {
550 destroy_workqueue(eeepc->led_workqueue);
551 return rv;
552 }
553
554 return 0;
555 }
556
557 static void eeepc_led_exit(struct eeepc_laptop *eeepc)
558 {
559 if (eeepc->tpd_led.dev)
560 led_classdev_unregister(&eeepc->tpd_led);
561 if (eeepc->led_workqueue)
562 destroy_workqueue(eeepc->led_workqueue);
563 }
564
565
566 /*
567 * PCI hotplug (for wlan rfkill)
568 */
569 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
570 {
571 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
572 return false;
573 return true;
574 }
575
576 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc)
577 {
578 struct pci_dev *dev;
579 struct pci_bus *bus;
580 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
581
582 if (eeepc->wlan_rfkill)
583 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
584
585 mutex_lock(&eeepc->hotplug_lock);
586
587 if (eeepc->hotplug_slot) {
588 bus = pci_find_bus(0, 1);
589 if (!bus) {
590 pr_warning("Unable to find PCI bus 1?\n");
591 goto out_unlock;
592 }
593
594 if (!blocked) {
595 dev = pci_get_slot(bus, 0);
596 if (dev) {
597 /* Device already present */
598 pci_dev_put(dev);
599 goto out_unlock;
600 }
601 dev = pci_scan_single_device(bus, 0);
602 if (dev) {
603 pci_bus_assign_resources(bus);
604 if (pci_bus_add_device(dev))
605 pr_err("Unable to hotplug wifi\n");
606 }
607 } else {
608 dev = pci_get_slot(bus, 0);
609 if (dev) {
610 pci_remove_bus_device(dev);
611 pci_dev_put(dev);
612 }
613 }
614 }
615
616 out_unlock:
617 mutex_unlock(&eeepc->hotplug_lock);
618 }
619
620 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
621 {
622 struct eeepc_laptop *eeepc = data;
623
624 if (event != ACPI_NOTIFY_BUS_CHECK)
625 return;
626
627 eeepc_rfkill_hotplug(eeepc);
628 }
629
630 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
631 char *node)
632 {
633 acpi_status status;
634 acpi_handle handle;
635
636 status = acpi_get_handle(NULL, node, &handle);
637
638 if (ACPI_SUCCESS(status)) {
639 status = acpi_install_notify_handler(handle,
640 ACPI_SYSTEM_NOTIFY,
641 eeepc_rfkill_notify,
642 eeepc);
643 if (ACPI_FAILURE(status))
644 pr_warning("Failed to register notify on %s\n", node);
645 } else
646 return -ENODEV;
647
648 return 0;
649 }
650
651 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
652 char *node)
653 {
654 acpi_status status = AE_OK;
655 acpi_handle handle;
656
657 status = acpi_get_handle(NULL, node, &handle);
658
659 if (ACPI_SUCCESS(status)) {
660 status = acpi_remove_notify_handler(handle,
661 ACPI_SYSTEM_NOTIFY,
662 eeepc_rfkill_notify);
663 if (ACPI_FAILURE(status))
664 pr_err("Error removing rfkill notify handler %s\n",
665 node);
666 }
667 }
668
669 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
670 u8 *value)
671 {
672 struct eeepc_laptop *eeepc = hotplug_slot->private;
673 int val = get_acpi(eeepc, CM_ASL_WLAN);
674
675 if (val == 1 || val == 0)
676 *value = val;
677 else
678 return -EINVAL;
679
680 return 0;
681 }
682
683 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
684 {
685 kfree(hotplug_slot->info);
686 kfree(hotplug_slot);
687 }
688
689 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
690 .owner = THIS_MODULE,
691 .get_adapter_status = eeepc_get_adapter_status,
692 .get_power_status = eeepc_get_adapter_status,
693 };
694
695 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
696 {
697 int ret = -ENOMEM;
698 struct pci_bus *bus = pci_find_bus(0, 1);
699
700 if (!bus) {
701 pr_err("Unable to find wifi PCI bus\n");
702 return -ENODEV;
703 }
704
705 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
706 if (!eeepc->hotplug_slot)
707 goto error_slot;
708
709 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
710 GFP_KERNEL);
711 if (!eeepc->hotplug_slot->info)
712 goto error_info;
713
714 eeepc->hotplug_slot->private = eeepc;
715 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
716 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
717 eeepc_get_adapter_status(eeepc->hotplug_slot,
718 &eeepc->hotplug_slot->info->adapter_status);
719
720 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
721 if (ret) {
722 pr_err("Unable to register hotplug slot - %d\n", ret);
723 goto error_register;
724 }
725
726 return 0;
727
728 error_register:
729 kfree(eeepc->hotplug_slot->info);
730 error_info:
731 kfree(eeepc->hotplug_slot);
732 eeepc->hotplug_slot = NULL;
733 error_slot:
734 return ret;
735 }
736
737 /*
738 * Rfkill devices
739 */
740 static int eeepc_rfkill_set(void *data, bool blocked)
741 {
742 acpi_handle handle = data;
743
744 return write_acpi_int(handle, NULL, !blocked);
745 }
746
747 static const struct rfkill_ops eeepc_rfkill_ops = {
748 .set_block = eeepc_rfkill_set,
749 };
750
751 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
752 struct rfkill **rfkill,
753 const char *name,
754 enum rfkill_type type, int cm)
755 {
756 acpi_handle handle;
757 int result;
758
759 result = acpi_setter_handle(eeepc, cm, &handle);
760 if (result < 0)
761 return result;
762
763 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
764 &eeepc_rfkill_ops, handle);
765
766 if (!*rfkill)
767 return -EINVAL;
768
769 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
770 result = rfkill_register(*rfkill);
771 if (result) {
772 rfkill_destroy(*rfkill);
773 *rfkill = NULL;
774 return result;
775 }
776 return 0;
777 }
778
779 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
780 {
781 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
782 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
783 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
784 if (eeepc->wlan_rfkill) {
785 rfkill_unregister(eeepc->wlan_rfkill);
786 rfkill_destroy(eeepc->wlan_rfkill);
787 eeepc->wlan_rfkill = NULL;
788 }
789 /*
790 * Refresh pci hotplug in case the rfkill state was changed after
791 * eeepc_unregister_rfkill_notifier()
792 */
793 eeepc_rfkill_hotplug(eeepc);
794 if (eeepc->hotplug_slot)
795 pci_hp_deregister(eeepc->hotplug_slot);
796
797 if (eeepc->bluetooth_rfkill) {
798 rfkill_unregister(eeepc->bluetooth_rfkill);
799 rfkill_destroy(eeepc->bluetooth_rfkill);
800 eeepc->bluetooth_rfkill = NULL;
801 }
802 if (eeepc->wwan3g_rfkill) {
803 rfkill_unregister(eeepc->wwan3g_rfkill);
804 rfkill_destroy(eeepc->wwan3g_rfkill);
805 eeepc->wwan3g_rfkill = NULL;
806 }
807 if (eeepc->wimax_rfkill) {
808 rfkill_unregister(eeepc->wimax_rfkill);
809 rfkill_destroy(eeepc->wimax_rfkill);
810 eeepc->wimax_rfkill = NULL;
811 }
812 }
813
814 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
815 {
816 int result = 0;
817
818 mutex_init(&eeepc->hotplug_lock);
819
820 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
821 "eeepc-wlan", RFKILL_TYPE_WLAN,
822 CM_ASL_WLAN);
823
824 if (result && result != -ENODEV)
825 goto exit;
826
827 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
828 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
829 CM_ASL_BLUETOOTH);
830
831 if (result && result != -ENODEV)
832 goto exit;
833
834 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
835 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
836 CM_ASL_3G);
837
838 if (result && result != -ENODEV)
839 goto exit;
840
841 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
842 "eeepc-wimax", RFKILL_TYPE_WIMAX,
843 CM_ASL_WIMAX);
844
845 if (result && result != -ENODEV)
846 goto exit;
847
848 if (eeepc->hotplug_disabled)
849 return 0;
850
851 result = eeepc_setup_pci_hotplug(eeepc);
852 /*
853 * If we get -EBUSY then something else is handling the PCI hotplug -
854 * don't fail in this case
855 */
856 if (result == -EBUSY)
857 result = 0;
858
859 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
860 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
861 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
862 /*
863 * Refresh pci hotplug in case the rfkill state was changed during
864 * setup.
865 */
866 eeepc_rfkill_hotplug(eeepc);
867
868 exit:
869 if (result && result != -ENODEV)
870 eeepc_rfkill_exit(eeepc);
871 return result;
872 }
873
874 /*
875 * Platform driver - hibernate/resume callbacks
876 */
877 static int eeepc_hotk_thaw(struct device *device)
878 {
879 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
880
881 if (eeepc->wlan_rfkill) {
882 bool wlan;
883
884 /*
885 * Work around bios bug - acpi _PTS turns off the wireless led
886 * during suspend. Normally it restores it on resume, but
887 * we should kick it ourselves in case hibernation is aborted.
888 */
889 wlan = get_acpi(eeepc, CM_ASL_WLAN);
890 set_acpi(eeepc, CM_ASL_WLAN, wlan);
891 }
892
893 return 0;
894 }
895
896 static int eeepc_hotk_restore(struct device *device)
897 {
898 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
899
900 /* Refresh both wlan rfkill state and pci hotplug */
901 if (eeepc->wlan_rfkill)
902 eeepc_rfkill_hotplug(eeepc);
903
904 if (eeepc->bluetooth_rfkill)
905 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
906 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
907 if (eeepc->wwan3g_rfkill)
908 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
909 get_acpi(eeepc, CM_ASL_3G) != 1);
910 if (eeepc->wimax_rfkill)
911 rfkill_set_sw_state(eeepc->wimax_rfkill,
912 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
913
914 return 0;
915 }
916
917 static const struct dev_pm_ops eeepc_pm_ops = {
918 .thaw = eeepc_hotk_thaw,
919 .restore = eeepc_hotk_restore,
920 };
921
922 static struct platform_driver platform_driver = {
923 .driver = {
924 .name = EEEPC_LAPTOP_FILE,
925 .owner = THIS_MODULE,
926 .pm = &eeepc_pm_ops,
927 }
928 };
929
930 /*
931 * Hwmon device
932 */
933
934 #define EEEPC_EC_SC00 0x61
935 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
936 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
937 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
938
939 #define EEEPC_EC_SFB0 0xD0
940 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
941
942 static int eeepc_get_fan_pwm(void)
943 {
944 u8 value = 0;
945
946 ec_read(EEEPC_EC_FAN_PWM, &value);
947 return value * 255 / 100;
948 }
949
950 static void eeepc_set_fan_pwm(int value)
951 {
952 value = SENSORS_LIMIT(value, 0, 255);
953 value = value * 100 / 255;
954 ec_write(EEEPC_EC_FAN_PWM, value);
955 }
956
957 static int eeepc_get_fan_rpm(void)
958 {
959 u8 high = 0;
960 u8 low = 0;
961
962 ec_read(EEEPC_EC_FAN_HRPM, &high);
963 ec_read(EEEPC_EC_FAN_LRPM, &low);
964 return high << 8 | low;
965 }
966
967 static int eeepc_get_fan_ctrl(void)
968 {
969 u8 value = 0;
970
971 ec_read(EEEPC_EC_FAN_CTRL, &value);
972 if (value & 0x02)
973 return 1; /* manual */
974 else
975 return 2; /* automatic */
976 }
977
978 static void eeepc_set_fan_ctrl(int manual)
979 {
980 u8 value = 0;
981
982 ec_read(EEEPC_EC_FAN_CTRL, &value);
983 if (manual == 1)
984 value |= 0x02;
985 else
986 value &= ~0x02;
987 ec_write(EEEPC_EC_FAN_CTRL, value);
988 }
989
990 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
991 {
992 int rv, value;
993
994 rv = parse_arg(buf, count, &value);
995 if (rv > 0)
996 set(value);
997 return rv;
998 }
999
1000 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1001 {
1002 return sprintf(buf, "%d\n", get());
1003 }
1004
1005 #define EEEPC_CREATE_SENSOR_ATTR(_name, _mode, _set, _get) \
1006 static ssize_t show_##_name(struct device *dev, \
1007 struct device_attribute *attr, \
1008 char *buf) \
1009 { \
1010 return show_sys_hwmon(_set, buf); \
1011 } \
1012 static ssize_t store_##_name(struct device *dev, \
1013 struct device_attribute *attr, \
1014 const char *buf, size_t count) \
1015 { \
1016 return store_sys_hwmon(_get, buf, count); \
1017 } \
1018 static SENSOR_DEVICE_ATTR(_name, _mode, show_##_name, store_##_name, 0);
1019
1020 EEEPC_CREATE_SENSOR_ATTR(fan1_input, S_IRUGO, eeepc_get_fan_rpm, NULL);
1021 EEEPC_CREATE_SENSOR_ATTR(pwm1, S_IRUGO | S_IWUSR,
1022 eeepc_get_fan_pwm, eeepc_set_fan_pwm);
1023 EEEPC_CREATE_SENSOR_ATTR(pwm1_enable, S_IRUGO | S_IWUSR,
1024 eeepc_get_fan_ctrl, eeepc_set_fan_ctrl);
1025
1026 static ssize_t
1027 show_name(struct device *dev, struct device_attribute *attr, char *buf)
1028 {
1029 return sprintf(buf, "eeepc\n");
1030 }
1031 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
1032
1033 static struct attribute *hwmon_attributes[] = {
1034 &sensor_dev_attr_pwm1.dev_attr.attr,
1035 &sensor_dev_attr_fan1_input.dev_attr.attr,
1036 &sensor_dev_attr_pwm1_enable.dev_attr.attr,
1037 &sensor_dev_attr_name.dev_attr.attr,
1038 NULL
1039 };
1040
1041 static struct attribute_group hwmon_attribute_group = {
1042 .attrs = hwmon_attributes
1043 };
1044
1045 static void eeepc_hwmon_exit(struct eeepc_laptop *eeepc)
1046 {
1047 struct device *hwmon;
1048
1049 hwmon = eeepc->hwmon_device;
1050 if (!hwmon)
1051 return;
1052 sysfs_remove_group(&hwmon->kobj,
1053 &hwmon_attribute_group);
1054 hwmon_device_unregister(hwmon);
1055 eeepc->hwmon_device = NULL;
1056 }
1057
1058 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1059 {
1060 struct device *hwmon;
1061 int result;
1062
1063 hwmon = hwmon_device_register(&eeepc->platform_device->dev);
1064 if (IS_ERR(hwmon)) {
1065 pr_err("Could not register eeepc hwmon device\n");
1066 eeepc->hwmon_device = NULL;
1067 return PTR_ERR(hwmon);
1068 }
1069 eeepc->hwmon_device = hwmon;
1070 result = sysfs_create_group(&hwmon->kobj,
1071 &hwmon_attribute_group);
1072 if (result)
1073 eeepc_hwmon_exit(eeepc);
1074 return result;
1075 }
1076
1077 /*
1078 * Backlight device
1079 */
1080 static int read_brightness(struct backlight_device *bd)
1081 {
1082 struct eeepc_laptop *eeepc = bl_get_data(bd);
1083
1084 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1085 }
1086
1087 static int set_brightness(struct backlight_device *bd, int value)
1088 {
1089 struct eeepc_laptop *eeepc = bl_get_data(bd);
1090
1091 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1092 }
1093
1094 static int update_bl_status(struct backlight_device *bd)
1095 {
1096 return set_brightness(bd, bd->props.brightness);
1097 }
1098
1099 static struct backlight_ops eeepcbl_ops = {
1100 .get_brightness = read_brightness,
1101 .update_status = update_bl_status,
1102 };
1103
1104 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1105 {
1106 struct backlight_device *bd = eeepc->backlight_device;
1107 int old = bd->props.brightness;
1108
1109 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1110
1111 return old;
1112 }
1113
1114 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1115 {
1116 struct backlight_device *bd;
1117
1118 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1119 &eeepc->platform_device->dev,
1120 eeepc, &eeepcbl_ops);
1121 if (IS_ERR(bd)) {
1122 pr_err("Could not register eeepc backlight device\n");
1123 eeepc->backlight_device = NULL;
1124 return PTR_ERR(bd);
1125 }
1126 eeepc->backlight_device = bd;
1127 bd->props.max_brightness = 15;
1128 bd->props.brightness = read_brightness(bd);
1129 bd->props.power = FB_BLANK_UNBLANK;
1130 backlight_update_status(bd);
1131 return 0;
1132 }
1133
1134 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1135 {
1136 if (eeepc->backlight_device)
1137 backlight_device_unregister(eeepc->backlight_device);
1138 eeepc->backlight_device = NULL;
1139 }
1140
1141
1142 /*
1143 * Input device (i.e. hotkeys)
1144 */
1145 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1146 {
1147 struct input_dev *input;
1148 int error;
1149
1150 input = input_allocate_device();
1151 if (!input) {
1152 pr_info("Unable to allocate input device\n");
1153 return -ENOMEM;
1154 }
1155
1156 input->name = "Asus EeePC extra buttons";
1157 input->phys = EEEPC_LAPTOP_FILE "/input0";
1158 input->id.bustype = BUS_HOST;
1159 input->dev.parent = &eeepc->platform_device->dev;
1160
1161 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1162 if (error) {
1163 pr_err("Unable to setup input device keymap\n");
1164 goto err_free_dev;
1165 }
1166
1167 error = input_register_device(input);
1168 if (error) {
1169 pr_err("Unable to register input device\n");
1170 goto err_free_keymap;
1171 }
1172
1173 eeepc->inputdev = input;
1174 return 0;
1175
1176 err_free_keymap:
1177 sparse_keymap_free(input);
1178 err_free_dev:
1179 input_free_device(input);
1180 return error;
1181 }
1182
1183 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1184 {
1185 if (eeepc->inputdev) {
1186 input_unregister_device(eeepc->inputdev);
1187 kfree(eeepc->keymap);
1188 }
1189 }
1190
1191 /*
1192 * ACPI driver
1193 */
1194 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1195 {
1196 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1197 u16 count;
1198
1199 if (event > ACPI_MAX_SYS_NOTIFY)
1200 return;
1201 count = eeepc->event_count[event % 128]++;
1202 acpi_bus_generate_proc_event(device, event, count);
1203 acpi_bus_generate_netlink_event(device->pnp.device_class,
1204 dev_name(&device->dev), event,
1205 count);
1206
1207 /* Brightness events are special */
1208 if (event >= NOTIFY_BRN_MIN && event <= NOTIFY_BRN_MAX) {
1209
1210 /* Ignore them completely if the acpi video driver is used */
1211 if (eeepc->backlight_device != NULL) {
1212 int old_brightness, new_brightness;
1213
1214 /* Update the backlight device. */
1215 old_brightness = eeepc_backlight_notify(eeepc);
1216
1217 /* Convert event to keypress (obsolescent hack) */
1218 new_brightness = event - NOTIFY_BRN_MIN;
1219
1220 if (new_brightness < old_brightness) {
1221 event = NOTIFY_BRN_MIN; /* brightness down */
1222 } else if (new_brightness > old_brightness) {
1223 event = NOTIFY_BRN_MAX; /* brightness up */
1224 } else {
1225 /*
1226 * no change in brightness - already at min/max,
1227 * event will be desired value (or else ignored)
1228 */
1229 }
1230 sparse_keymap_report_event(eeepc->inputdev, event,
1231 1, true);
1232 }
1233 } else {
1234 /* Everything else is a bona-fide keypress event */
1235 sparse_keymap_report_event(eeepc->inputdev, event, 1, true);
1236 }
1237 }
1238
1239 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1240 {
1241 const char *model;
1242
1243 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1244 if (!model)
1245 return;
1246
1247 /*
1248 * Blacklist for setting cpufv (cpu speed).
1249 *
1250 * EeePC 4G ("701") implements CFVS, but it is not supported
1251 * by the pre-installed OS, and the original option to change it
1252 * in the BIOS setup screen was removed in later versions.
1253 *
1254 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1255 * this applies to all "701" models (4G/4G Surf/2G Surf).
1256 *
1257 * So Asus made a deliberate decision not to support it on this model.
1258 * We have several reports that using it can cause the system to hang
1259 *
1260 * The hang has also been reported on a "702" (Model name "8G"?).
1261 *
1262 * We avoid dmi_check_system() / dmi_match(), because they use
1263 * substring matching. We don't want to affect the "701SD"
1264 * and "701SDX" models, because they do support S.H.E.
1265 */
1266 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1267 eeepc->cpufv_disabled = true;
1268 pr_info("model %s does not officially support setting cpu "
1269 "speed\n", model);
1270 pr_info("cpufv disabled to avoid instability\n");
1271 }
1272
1273 /*
1274 * Blacklist for wlan hotplug
1275 *
1276 * Eeepc 1005HA doesn't work like others models and don't need the
1277 * hotplug code. In fact, current hotplug code seems to unplug another
1278 * device...
1279 */
1280 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0) {
1281 eeepc->hotplug_disabled = true;
1282 pr_info("wlan hotplug disabled\n");
1283 }
1284 }
1285
1286 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1287 {
1288 int dummy;
1289
1290 /* Some BIOSes do not report cm although it is avaliable.
1291 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1292 if (!(eeepc->cm_supported & (1 << cm))
1293 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1294 pr_info("%s (%x) not reported by BIOS,"
1295 " enabling anyway\n", name, 1 << cm);
1296 eeepc->cm_supported |= 1 << cm;
1297 }
1298 }
1299
1300 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1301 {
1302 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1303 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1304 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1305 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1306 }
1307
1308 static int eeepc_acpi_init(struct eeepc_laptop *eeepc,
1309 struct acpi_device *device)
1310 {
1311 unsigned int init_flags;
1312 int result;
1313
1314 result = acpi_bus_get_status(device);
1315 if (result)
1316 return result;
1317 if (!device->status.present) {
1318 pr_err("Hotkey device not present, aborting\n");
1319 return -ENODEV;
1320 }
1321
1322 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1323 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1324
1325 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1326 pr_err("Hotkey initialization failed\n");
1327 return -ENODEV;
1328 }
1329
1330 /* get control methods supported */
1331 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1332 pr_err("Get control methods supported failed\n");
1333 return -ENODEV;
1334 }
1335 cmsg_quirks(eeepc);
1336 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1337
1338 return 0;
1339 }
1340
1341 static void __devinit eeepc_enable_camera(struct eeepc_laptop *eeepc)
1342 {
1343 /*
1344 * If the following call to set_acpi() fails, it's because there's no
1345 * camera so we can ignore the error.
1346 */
1347 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1348 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1349 }
1350
1351 static bool eeepc_device_present;
1352
1353 static int __devinit eeepc_acpi_add(struct acpi_device *device)
1354 {
1355 struct eeepc_laptop *eeepc;
1356 int result;
1357
1358 pr_notice(EEEPC_LAPTOP_NAME "\n");
1359 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1360 if (!eeepc)
1361 return -ENOMEM;
1362 eeepc->handle = device->handle;
1363 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1364 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1365 device->driver_data = eeepc;
1366
1367 eeepc->hotplug_disabled = hotplug_disabled;
1368
1369 eeepc_dmi_check(eeepc);
1370
1371 result = eeepc_acpi_init(eeepc, device);
1372 if (result)
1373 goto fail_platform;
1374 eeepc_enable_camera(eeepc);
1375
1376 /*
1377 * Register the platform device first. It is used as a parent for the
1378 * sub-devices below.
1379 *
1380 * Note that if there are multiple instances of this ACPI device it
1381 * will bail out, because the platform device is registered with a
1382 * fixed name. Of course it doesn't make sense to have more than one,
1383 * and machine-specific scripts find the fixed name convenient. But
1384 * It's also good for us to exclude multiple instances because both
1385 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1386 * (the EC and the wlan PCI slot respectively).
1387 */
1388 result = eeepc_platform_init(eeepc);
1389 if (result)
1390 goto fail_platform;
1391
1392 if (!acpi_video_backlight_support()) {
1393 result = eeepc_backlight_init(eeepc);
1394 if (result)
1395 goto fail_backlight;
1396 } else
1397 pr_info("Backlight controlled by ACPI video driver\n");
1398
1399 result = eeepc_input_init(eeepc);
1400 if (result)
1401 goto fail_input;
1402
1403 result = eeepc_hwmon_init(eeepc);
1404 if (result)
1405 goto fail_hwmon;
1406
1407 result = eeepc_led_init(eeepc);
1408 if (result)
1409 goto fail_led;
1410
1411 result = eeepc_rfkill_init(eeepc);
1412 if (result)
1413 goto fail_rfkill;
1414
1415 eeepc_device_present = true;
1416 return 0;
1417
1418 fail_rfkill:
1419 eeepc_led_exit(eeepc);
1420 fail_led:
1421 eeepc_hwmon_exit(eeepc);
1422 fail_hwmon:
1423 eeepc_input_exit(eeepc);
1424 fail_input:
1425 eeepc_backlight_exit(eeepc);
1426 fail_backlight:
1427 eeepc_platform_exit(eeepc);
1428 fail_platform:
1429 kfree(eeepc);
1430
1431 return result;
1432 }
1433
1434 static int eeepc_acpi_remove(struct acpi_device *device, int type)
1435 {
1436 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1437
1438 eeepc_backlight_exit(eeepc);
1439 eeepc_rfkill_exit(eeepc);
1440 eeepc_input_exit(eeepc);
1441 eeepc_hwmon_exit(eeepc);
1442 eeepc_led_exit(eeepc);
1443 eeepc_platform_exit(eeepc);
1444
1445 kfree(eeepc);
1446 return 0;
1447 }
1448
1449
1450 static const struct acpi_device_id eeepc_device_ids[] = {
1451 {EEEPC_ACPI_HID, 0},
1452 {"", 0},
1453 };
1454 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1455
1456 static struct acpi_driver eeepc_acpi_driver = {
1457 .name = EEEPC_LAPTOP_NAME,
1458 .class = EEEPC_ACPI_CLASS,
1459 .owner = THIS_MODULE,
1460 .ids = eeepc_device_ids,
1461 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1462 .ops = {
1463 .add = eeepc_acpi_add,
1464 .remove = eeepc_acpi_remove,
1465 .notify = eeepc_acpi_notify,
1466 },
1467 };
1468
1469
1470 static int __init eeepc_laptop_init(void)
1471 {
1472 int result;
1473
1474 result = platform_driver_register(&platform_driver);
1475 if (result < 0)
1476 return result;
1477
1478 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1479 if (result < 0)
1480 goto fail_acpi_driver;
1481
1482 if (!eeepc_device_present) {
1483 result = -ENODEV;
1484 goto fail_no_device;
1485 }
1486
1487 return 0;
1488
1489 fail_no_device:
1490 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1491 fail_acpi_driver:
1492 platform_driver_unregister(&platform_driver);
1493 return result;
1494 }
1495
1496 static void __exit eeepc_laptop_exit(void)
1497 {
1498 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1499 platform_driver_unregister(&platform_driver);
1500 }
1501
1502 module_init(eeepc_laptop_init);
1503 module_exit(eeepc_laptop_exit);
Linux kernel - Deliverables
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