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Merge branch 'for-linus-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...
[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 <linux/slab.h>
31 #include <linux/acpi.h>
32 #include <linux/uaccess.h>
33 #include <linux/input.h>
34 #include <linux/input/sparse-keymap.h>
35 #include <linux/rfkill.h>
36 #include <linux/pci.h>
37 #include <linux/pci_hotplug.h>
38 #include <linux/leds.h>
39 #include <linux/dmi.h>
40 #include <acpi/video.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 backlight_device *backlight_device;
170
171 struct input_dev *inputdev;
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 acpi_status status;
193
194 status = acpi_execute_simple_method(handle, (char *)method, val);
195
196 return (status == AE_OK ? 0 : -1);
197 }
198
199 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
200 {
201 acpi_status status;
202 unsigned long long result;
203
204 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
205 if (ACPI_FAILURE(status)) {
206 *val = -1;
207 return -1;
208 } else {
209 *val = result;
210 return 0;
211 }
212 }
213
214 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
215 {
216 const char *method = cm_setv[cm];
217
218 if (method == NULL)
219 return -ENODEV;
220 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
221 return -ENODEV;
222
223 if (write_acpi_int(eeepc->handle, method, value))
224 pr_warn("Error writing %s\n", method);
225 return 0;
226 }
227
228 static int get_acpi(struct eeepc_laptop *eeepc, int cm)
229 {
230 const char *method = cm_getv[cm];
231 int value;
232
233 if (method == NULL)
234 return -ENODEV;
235 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
236 return -ENODEV;
237
238 if (read_acpi_int(eeepc->handle, method, &value))
239 pr_warn("Error reading %s\n", method);
240 return value;
241 }
242
243 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
244 acpi_handle *handle)
245 {
246 const char *method = cm_setv[cm];
247 acpi_status status;
248
249 if (method == NULL)
250 return -ENODEV;
251 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
252 return -ENODEV;
253
254 status = acpi_get_handle(eeepc->handle, (char *)method,
255 handle);
256 if (status != AE_OK) {
257 pr_warn("Error finding %s\n", method);
258 return -ENODEV;
259 }
260 return 0;
261 }
262
263
264 /*
265 * Sys helpers
266 */
267 static int parse_arg(const char *buf, int *val)
268 {
269 if (sscanf(buf, "%i", val) != 1)
270 return -EINVAL;
271 return 0;
272 }
273
274 static ssize_t store_sys_acpi(struct device *dev, int cm,
275 const char *buf, size_t count)
276 {
277 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
278 int rv, value;
279
280 rv = parse_arg(buf, &value);
281 if (rv < 0)
282 return rv;
283 rv = set_acpi(eeepc, cm, value);
284 if (rv < 0)
285 return -EIO;
286 return count;
287 }
288
289 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
290 {
291 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
292 int value = get_acpi(eeepc, cm);
293
294 if (value < 0)
295 return -EIO;
296 return sprintf(buf, "%d\n", value);
297 }
298
299 #define EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
300 static ssize_t _name##_show(struct device *dev, \
301 struct device_attribute *attr, \
302 char *buf) \
303 { \
304 return show_sys_acpi(dev, _cm, buf); \
305 }
306
307 #define EEEPC_ACPI_STORE_FUNC(_name, _cm) \
308 static ssize_t _name##_store(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
315 #define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm) \
316 EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
317 EEEPC_ACPI_STORE_FUNC(_name, _cm) \
318 static DEVICE_ATTR_RW(_name)
319
320 #define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm) \
321 EEEPC_ACPI_STORE_FUNC(_name, _cm) \
322 static DEVICE_ATTR_WO(_name)
323
324 EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA);
325 EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER);
326 EEEPC_CREATE_DEVICE_ATTR_WO(disp, CM_ASL_DISPLAYSWITCH);
327
328 struct eeepc_cpufv {
329 int num;
330 int cur;
331 };
332
333 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
334 {
335 c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
336 if (c->cur < 0)
337 return -ENODEV;
338
339 c->num = (c->cur >> 8) & 0xff;
340 c->cur &= 0xff;
341 if (c->num == 0 || c->num > 12)
342 return -ENODEV;
343 return 0;
344 }
345
346 static ssize_t available_cpufv_show(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 cpufv_show(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 cpufv_store(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, &value);
388 if (rv < 0)
389 return rv;
390 if (value < 0 || value >= c.num)
391 return -EINVAL;
392 rv = set_acpi(eeepc, CM_ASL_CPUFV, value);
393 if (rv)
394 return rv;
395 return count;
396 }
397
398 static ssize_t cpufv_disabled_show(struct device *dev,
399 struct device_attribute *attr,
400 char *buf)
401 {
402 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
403
404 return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
405 }
406
407 static ssize_t cpufv_disabled_store(struct device *dev,
408 struct device_attribute *attr,
409 const char *buf, size_t count)
410 {
411 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
412 int rv, value;
413
414 rv = parse_arg(buf, &value);
415 if (rv < 0)
416 return rv;
417
418 switch (value) {
419 case 0:
420 if (eeepc->cpufv_disabled)
421 pr_warn("cpufv enabled (not officially supported on this model)\n");
422 eeepc->cpufv_disabled = false;
423 return count;
424 case 1:
425 return -EPERM;
426 default:
427 return -EINVAL;
428 }
429 }
430
431
432 static DEVICE_ATTR_RW(cpufv);
433 static DEVICE_ATTR_RO(available_cpufv);
434 static DEVICE_ATTR_RW(cpufv_disabled);
435
436 static struct attribute *platform_attributes[] = {
437 &dev_attr_camera.attr,
438 &dev_attr_cardr.attr,
439 &dev_attr_disp.attr,
440 &dev_attr_cpufv.attr,
441 &dev_attr_available_cpufv.attr,
442 &dev_attr_cpufv_disabled.attr,
443 NULL
444 };
445
446 static struct attribute_group platform_attribute_group = {
447 .attrs = platform_attributes
448 };
449
450 static int eeepc_platform_init(struct eeepc_laptop *eeepc)
451 {
452 int result;
453
454 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
455 if (!eeepc->platform_device)
456 return -ENOMEM;
457 platform_set_drvdata(eeepc->platform_device, eeepc);
458
459 result = platform_device_add(eeepc->platform_device);
460 if (result)
461 goto fail_platform_device;
462
463 result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
464 &platform_attribute_group);
465 if (result)
466 goto fail_sysfs;
467 return 0;
468
469 fail_sysfs:
470 platform_device_del(eeepc->platform_device);
471 fail_platform_device:
472 platform_device_put(eeepc->platform_device);
473 return result;
474 }
475
476 static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
477 {
478 sysfs_remove_group(&eeepc->platform_device->dev.kobj,
479 &platform_attribute_group);
480 platform_device_unregister(eeepc->platform_device);
481 }
482
483 /*
484 * LEDs
485 */
486 /*
487 * These functions actually update the LED's, and are called from a
488 * workqueue. By doing this as separate work rather than when the LED
489 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
490 * potentially bad time, such as a timer interrupt.
491 */
492 static void tpd_led_update(struct work_struct *work)
493 {
494 struct eeepc_laptop *eeepc;
495
496 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
497
498 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
499 }
500
501 static void tpd_led_set(struct led_classdev *led_cdev,
502 enum led_brightness value)
503 {
504 struct eeepc_laptop *eeepc;
505
506 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
507
508 eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
509 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
510 }
511
512 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
513 {
514 struct eeepc_laptop *eeepc;
515
516 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
517
518 return get_acpi(eeepc, CM_ASL_TPD);
519 }
520
521 static int eeepc_led_init(struct eeepc_laptop *eeepc)
522 {
523 int rv;
524
525 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
526 return 0;
527
528 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
529 if (!eeepc->led_workqueue)
530 return -ENOMEM;
531 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
532
533 eeepc->tpd_led.name = "eeepc::touchpad";
534 eeepc->tpd_led.brightness_set = tpd_led_set;
535 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
536 eeepc->tpd_led.brightness_get = tpd_led_get;
537 eeepc->tpd_led.max_brightness = 1;
538
539 rv = led_classdev_register(&eeepc->platform_device->dev,
540 &eeepc->tpd_led);
541 if (rv) {
542 destroy_workqueue(eeepc->led_workqueue);
543 return rv;
544 }
545
546 return 0;
547 }
548
549 static void eeepc_led_exit(struct eeepc_laptop *eeepc)
550 {
551 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev))
552 led_classdev_unregister(&eeepc->tpd_led);
553 if (eeepc->led_workqueue)
554 destroy_workqueue(eeepc->led_workqueue);
555 }
556
557
558 /*
559 * PCI hotplug (for wlan rfkill)
560 */
561 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
562 {
563 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
564 return false;
565 return true;
566 }
567
568 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
569 {
570 struct pci_dev *port;
571 struct pci_dev *dev;
572 struct pci_bus *bus;
573 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
574 bool absent;
575 u32 l;
576
577 if (eeepc->wlan_rfkill)
578 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
579
580 mutex_lock(&eeepc->hotplug_lock);
581 pci_lock_rescan_remove();
582
583 if (!eeepc->hotplug_slot)
584 goto out_unlock;
585
586 port = acpi_get_pci_dev(handle);
587 if (!port) {
588 pr_warning("Unable to find port\n");
589 goto out_unlock;
590 }
591
592 bus = port->subordinate;
593
594 if (!bus) {
595 pr_warn("Unable to find PCI bus 1?\n");
596 goto out_put_dev;
597 }
598
599 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
600 pr_err("Unable to read PCI config space?\n");
601 goto out_put_dev;
602 }
603
604 absent = (l == 0xffffffff);
605
606 if (blocked != absent) {
607 pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n",
608 blocked ? "blocked" : "unblocked",
609 absent ? "absent" : "present");
610 pr_warn("skipped wireless hotplug as probably inappropriate for this model\n");
611 goto out_put_dev;
612 }
613
614 if (!blocked) {
615 dev = pci_get_slot(bus, 0);
616 if (dev) {
617 /* Device already present */
618 pci_dev_put(dev);
619 goto out_put_dev;
620 }
621 dev = pci_scan_single_device(bus, 0);
622 if (dev) {
623 pci_bus_assign_resources(bus);
624 pci_bus_add_device(dev);
625 }
626 } else {
627 dev = pci_get_slot(bus, 0);
628 if (dev) {
629 pci_stop_and_remove_bus_device(dev);
630 pci_dev_put(dev);
631 }
632 }
633 out_put_dev:
634 pci_dev_put(port);
635
636 out_unlock:
637 pci_unlock_rescan_remove();
638 mutex_unlock(&eeepc->hotplug_lock);
639 }
640
641 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
642 {
643 acpi_status status = AE_OK;
644 acpi_handle handle;
645
646 status = acpi_get_handle(NULL, node, &handle);
647
648 if (ACPI_SUCCESS(status))
649 eeepc_rfkill_hotplug(eeepc, handle);
650 }
651
652 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
653 {
654 struct eeepc_laptop *eeepc = data;
655
656 if (event != ACPI_NOTIFY_BUS_CHECK)
657 return;
658
659 eeepc_rfkill_hotplug(eeepc, handle);
660 }
661
662 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
663 char *node)
664 {
665 acpi_status status;
666 acpi_handle handle;
667
668 status = acpi_get_handle(NULL, node, &handle);
669
670 if (ACPI_FAILURE(status))
671 return -ENODEV;
672
673 status = acpi_install_notify_handler(handle,
674 ACPI_SYSTEM_NOTIFY,
675 eeepc_rfkill_notify,
676 eeepc);
677 if (ACPI_FAILURE(status))
678 pr_warn("Failed to register notify on %s\n", node);
679
680 /*
681 * Refresh pci hotplug in case the rfkill state was
682 * changed during setup.
683 */
684 eeepc_rfkill_hotplug(eeepc, handle);
685 return 0;
686 }
687
688 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
689 char *node)
690 {
691 acpi_status status = AE_OK;
692 acpi_handle handle;
693
694 status = acpi_get_handle(NULL, node, &handle);
695
696 if (ACPI_FAILURE(status))
697 return;
698
699 status = acpi_remove_notify_handler(handle,
700 ACPI_SYSTEM_NOTIFY,
701 eeepc_rfkill_notify);
702 if (ACPI_FAILURE(status))
703 pr_err("Error removing rfkill notify handler %s\n",
704 node);
705 /*
706 * Refresh pci hotplug in case the rfkill
707 * state was changed after
708 * eeepc_unregister_rfkill_notifier()
709 */
710 eeepc_rfkill_hotplug(eeepc, handle);
711 }
712
713 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
714 u8 *value)
715 {
716 struct eeepc_laptop *eeepc = hotplug_slot->private;
717 int val = get_acpi(eeepc, CM_ASL_WLAN);
718
719 if (val == 1 || val == 0)
720 *value = val;
721 else
722 return -EINVAL;
723
724 return 0;
725 }
726
727 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
728 {
729 kfree(hotplug_slot->info);
730 kfree(hotplug_slot);
731 }
732
733 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
734 .owner = THIS_MODULE,
735 .get_adapter_status = eeepc_get_adapter_status,
736 .get_power_status = eeepc_get_adapter_status,
737 };
738
739 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
740 {
741 int ret = -ENOMEM;
742 struct pci_bus *bus = pci_find_bus(0, 1);
743
744 if (!bus) {
745 pr_err("Unable to find wifi PCI bus\n");
746 return -ENODEV;
747 }
748
749 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
750 if (!eeepc->hotplug_slot)
751 goto error_slot;
752
753 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
754 GFP_KERNEL);
755 if (!eeepc->hotplug_slot->info)
756 goto error_info;
757
758 eeepc->hotplug_slot->private = eeepc;
759 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
760 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
761 eeepc_get_adapter_status(eeepc->hotplug_slot,
762 &eeepc->hotplug_slot->info->adapter_status);
763
764 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
765 if (ret) {
766 pr_err("Unable to register hotplug slot - %d\n", ret);
767 goto error_register;
768 }
769
770 return 0;
771
772 error_register:
773 kfree(eeepc->hotplug_slot->info);
774 error_info:
775 kfree(eeepc->hotplug_slot);
776 eeepc->hotplug_slot = NULL;
777 error_slot:
778 return ret;
779 }
780
781 /*
782 * Rfkill devices
783 */
784 static int eeepc_rfkill_set(void *data, bool blocked)
785 {
786 acpi_handle handle = data;
787
788 return write_acpi_int(handle, NULL, !blocked);
789 }
790
791 static const struct rfkill_ops eeepc_rfkill_ops = {
792 .set_block = eeepc_rfkill_set,
793 };
794
795 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
796 struct rfkill **rfkill,
797 const char *name,
798 enum rfkill_type type, int cm)
799 {
800 acpi_handle handle;
801 int result;
802
803 result = acpi_setter_handle(eeepc, cm, &handle);
804 if (result < 0)
805 return result;
806
807 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
808 &eeepc_rfkill_ops, handle);
809
810 if (!*rfkill)
811 return -EINVAL;
812
813 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
814 result = rfkill_register(*rfkill);
815 if (result) {
816 rfkill_destroy(*rfkill);
817 *rfkill = NULL;
818 return result;
819 }
820 return 0;
821 }
822
823 static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
824 static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
825 static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
826
827 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
828 {
829 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
830 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
831 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
832 if (eeepc->wlan_rfkill) {
833 rfkill_unregister(eeepc->wlan_rfkill);
834 rfkill_destroy(eeepc->wlan_rfkill);
835 eeepc->wlan_rfkill = NULL;
836 }
837
838 if (eeepc->hotplug_slot)
839 pci_hp_deregister(eeepc->hotplug_slot);
840
841 if (eeepc->bluetooth_rfkill) {
842 rfkill_unregister(eeepc->bluetooth_rfkill);
843 rfkill_destroy(eeepc->bluetooth_rfkill);
844 eeepc->bluetooth_rfkill = NULL;
845 }
846 if (eeepc->wwan3g_rfkill) {
847 rfkill_unregister(eeepc->wwan3g_rfkill);
848 rfkill_destroy(eeepc->wwan3g_rfkill);
849 eeepc->wwan3g_rfkill = NULL;
850 }
851 if (eeepc->wimax_rfkill) {
852 rfkill_unregister(eeepc->wimax_rfkill);
853 rfkill_destroy(eeepc->wimax_rfkill);
854 eeepc->wimax_rfkill = NULL;
855 }
856 }
857
858 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
859 {
860 int result = 0;
861
862 mutex_init(&eeepc->hotplug_lock);
863
864 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
865 "eeepc-wlan", RFKILL_TYPE_WLAN,
866 CM_ASL_WLAN);
867
868 if (result && result != -ENODEV)
869 goto exit;
870
871 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
872 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
873 CM_ASL_BLUETOOTH);
874
875 if (result && result != -ENODEV)
876 goto exit;
877
878 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
879 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
880 CM_ASL_3G);
881
882 if (result && result != -ENODEV)
883 goto exit;
884
885 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
886 "eeepc-wimax", RFKILL_TYPE_WIMAX,
887 CM_ASL_WIMAX);
888
889 if (result && result != -ENODEV)
890 goto exit;
891
892 if (eeepc->hotplug_disabled)
893 return 0;
894
895 result = eeepc_setup_pci_hotplug(eeepc);
896 /*
897 * If we get -EBUSY then something else is handling the PCI hotplug -
898 * don't fail in this case
899 */
900 if (result == -EBUSY)
901 result = 0;
902
903 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
904 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
905 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
906
907 exit:
908 if (result && result != -ENODEV)
909 eeepc_rfkill_exit(eeepc);
910 return result;
911 }
912
913 /*
914 * Platform driver - hibernate/resume callbacks
915 */
916 static int eeepc_hotk_thaw(struct device *device)
917 {
918 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
919
920 if (eeepc->wlan_rfkill) {
921 int wlan;
922
923 /*
924 * Work around bios bug - acpi _PTS turns off the wireless led
925 * during suspend. Normally it restores it on resume, but
926 * we should kick it ourselves in case hibernation is aborted.
927 */
928 wlan = get_acpi(eeepc, CM_ASL_WLAN);
929 if (wlan >= 0)
930 set_acpi(eeepc, CM_ASL_WLAN, wlan);
931 }
932
933 return 0;
934 }
935
936 static int eeepc_hotk_restore(struct device *device)
937 {
938 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
939
940 /* Refresh both wlan rfkill state and pci hotplug */
941 if (eeepc->wlan_rfkill) {
942 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1);
943 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
944 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
945 }
946
947 if (eeepc->bluetooth_rfkill)
948 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
949 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
950 if (eeepc->wwan3g_rfkill)
951 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
952 get_acpi(eeepc, CM_ASL_3G) != 1);
953 if (eeepc->wimax_rfkill)
954 rfkill_set_sw_state(eeepc->wimax_rfkill,
955 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
956
957 return 0;
958 }
959
960 static const struct dev_pm_ops eeepc_pm_ops = {
961 .thaw = eeepc_hotk_thaw,
962 .restore = eeepc_hotk_restore,
963 };
964
965 static struct platform_driver platform_driver = {
966 .driver = {
967 .name = EEEPC_LAPTOP_FILE,
968 .pm = &eeepc_pm_ops,
969 }
970 };
971
972 /*
973 * Hwmon device
974 */
975
976 #define EEEPC_EC_SC00 0x61
977 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
978 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
979 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
980
981 #define EEEPC_EC_SFB0 0xD0
982 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
983
984 static inline int eeepc_pwm_to_lmsensors(int value)
985 {
986 return value * 255 / 100;
987 }
988
989 static inline int eeepc_lmsensors_to_pwm(int value)
990 {
991 value = clamp_val(value, 0, 255);
992 return value * 100 / 255;
993 }
994
995 static int eeepc_get_fan_pwm(void)
996 {
997 u8 value = 0;
998
999 ec_read(EEEPC_EC_FAN_PWM, &value);
1000 return eeepc_pwm_to_lmsensors(value);
1001 }
1002
1003 static void eeepc_set_fan_pwm(int value)
1004 {
1005 value = eeepc_lmsensors_to_pwm(value);
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 #define EEEPC_EC_FAN_CTRL_BIT 0x02
1020 #define EEEPC_FAN_CTRL_MANUAL 1
1021 #define EEEPC_FAN_CTRL_AUTO 2
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 & EEEPC_EC_FAN_CTRL_BIT)
1029 return EEEPC_FAN_CTRL_MANUAL;
1030 else
1031 return EEEPC_FAN_CTRL_AUTO;
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 == EEEPC_FAN_CTRL_MANUAL)
1040 value |= EEEPC_EC_FAN_CTRL_BIT;
1041 else
1042 value &= ~EEEPC_EC_FAN_CTRL_BIT;
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, &value);
1051 if (rv < 0)
1052 return rv;
1053 set(value);
1054 return count;
1055 }
1056
1057 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1058 {
1059 return sprintf(buf, "%d\n", get());
1060 }
1061
1062 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1063 static ssize_t _name##_show(struct device *dev, \
1064 struct device_attribute *attr, \
1065 char *buf) \
1066 { \
1067 return show_sys_hwmon(_get, buf); \
1068 }
1069
1070 #define EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1071 static ssize_t _name##_store(struct device *dev, \
1072 struct device_attribute *attr, \
1073 const char *buf, size_t count) \
1074 { \
1075 return store_sys_hwmon(_set, buf, count); \
1076 }
1077
1078 #define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \
1079 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1080 EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1081 static DEVICE_ATTR_RW(_name)
1082
1083 #define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \
1084 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1085 static DEVICE_ATTR_RO(_name)
1086
1087 EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
1088 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
1089 eeepc_set_fan_pwm);
1090 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
1091 eeepc_set_fan_ctrl);
1092
1093 static struct attribute *hwmon_attrs[] = {
1094 &dev_attr_pwm1.attr,
1095 &dev_attr_fan1_input.attr,
1096 &dev_attr_pwm1_enable.attr,
1097 NULL
1098 };
1099 ATTRIBUTE_GROUPS(hwmon);
1100
1101 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1102 {
1103 struct device *dev = &eeepc->platform_device->dev;
1104 struct device *hwmon;
1105
1106 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1107 hwmon_groups);
1108 if (IS_ERR(hwmon)) {
1109 pr_err("Could not register eeepc hwmon device\n");
1110 return PTR_ERR(hwmon);
1111 }
1112 return 0;
1113 }
1114
1115 /*
1116 * Backlight device
1117 */
1118 static int read_brightness(struct backlight_device *bd)
1119 {
1120 struct eeepc_laptop *eeepc = bl_get_data(bd);
1121
1122 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1123 }
1124
1125 static int set_brightness(struct backlight_device *bd, int value)
1126 {
1127 struct eeepc_laptop *eeepc = bl_get_data(bd);
1128
1129 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1130 }
1131
1132 static int update_bl_status(struct backlight_device *bd)
1133 {
1134 return set_brightness(bd, bd->props.brightness);
1135 }
1136
1137 static const struct backlight_ops eeepcbl_ops = {
1138 .get_brightness = read_brightness,
1139 .update_status = update_bl_status,
1140 };
1141
1142 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1143 {
1144 struct backlight_device *bd = eeepc->backlight_device;
1145 int old = bd->props.brightness;
1146
1147 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1148
1149 return old;
1150 }
1151
1152 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1153 {
1154 struct backlight_properties props;
1155 struct backlight_device *bd;
1156
1157 memset(&props, 0, sizeof(struct backlight_properties));
1158 props.type = BACKLIGHT_PLATFORM;
1159 props.max_brightness = 15;
1160 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1161 &eeepc->platform_device->dev, eeepc,
1162 &eeepcbl_ops, &props);
1163 if (IS_ERR(bd)) {
1164 pr_err("Could not register eeepc backlight device\n");
1165 eeepc->backlight_device = NULL;
1166 return PTR_ERR(bd);
1167 }
1168 eeepc->backlight_device = bd;
1169 bd->props.brightness = read_brightness(bd);
1170 bd->props.power = FB_BLANK_UNBLANK;
1171 backlight_update_status(bd);
1172 return 0;
1173 }
1174
1175 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1176 {
1177 backlight_device_unregister(eeepc->backlight_device);
1178 eeepc->backlight_device = NULL;
1179 }
1180
1181
1182 /*
1183 * Input device (i.e. hotkeys)
1184 */
1185 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1186 {
1187 struct input_dev *input;
1188 int error;
1189
1190 input = input_allocate_device();
1191 if (!input)
1192 return -ENOMEM;
1193
1194 input->name = "Asus EeePC extra buttons";
1195 input->phys = EEEPC_LAPTOP_FILE "/input0";
1196 input->id.bustype = BUS_HOST;
1197 input->dev.parent = &eeepc->platform_device->dev;
1198
1199 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1200 if (error) {
1201 pr_err("Unable to setup input device keymap\n");
1202 goto err_free_dev;
1203 }
1204
1205 error = input_register_device(input);
1206 if (error) {
1207 pr_err("Unable to register input device\n");
1208 goto err_free_keymap;
1209 }
1210
1211 eeepc->inputdev = input;
1212 return 0;
1213
1214 err_free_keymap:
1215 sparse_keymap_free(input);
1216 err_free_dev:
1217 input_free_device(input);
1218 return error;
1219 }
1220
1221 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1222 {
1223 if (eeepc->inputdev) {
1224 sparse_keymap_free(eeepc->inputdev);
1225 input_unregister_device(eeepc->inputdev);
1226 }
1227 eeepc->inputdev = NULL;
1228 }
1229
1230 /*
1231 * ACPI driver
1232 */
1233 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1234 {
1235 if (!eeepc->inputdev)
1236 return;
1237 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1238 pr_info("Unknown key %x pressed\n", event);
1239 }
1240
1241 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1242 {
1243 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1244 int old_brightness, new_brightness;
1245 u16 count;
1246
1247 if (event > ACPI_MAX_SYS_NOTIFY)
1248 return;
1249 count = eeepc->event_count[event % 128]++;
1250 acpi_bus_generate_netlink_event(device->pnp.device_class,
1251 dev_name(&device->dev), event,
1252 count);
1253
1254 /* Brightness events are special */
1255 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) {
1256 eeepc_input_notify(eeepc, event);
1257 return;
1258 }
1259
1260 /* Ignore them completely if the acpi video driver is used */
1261 if (!eeepc->backlight_device)
1262 return;
1263
1264 /* Update the backlight device. */
1265 old_brightness = eeepc_backlight_notify(eeepc);
1266
1267 /* Convert event to keypress (obsolescent hack) */
1268 new_brightness = event - NOTIFY_BRN_MIN;
1269
1270 if (new_brightness < old_brightness) {
1271 event = NOTIFY_BRN_MIN; /* brightness down */
1272 } else if (new_brightness > old_brightness) {
1273 event = NOTIFY_BRN_MAX; /* brightness up */
1274 } else {
1275 /*
1276 * no change in brightness - already at min/max,
1277 * event will be desired value (or else ignored)
1278 */
1279 }
1280 eeepc_input_notify(eeepc, event);
1281 }
1282
1283 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1284 {
1285 const char *model;
1286
1287 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1288 if (!model)
1289 return;
1290
1291 /*
1292 * Blacklist for setting cpufv (cpu speed).
1293 *
1294 * EeePC 4G ("701") implements CFVS, but it is not supported
1295 * by the pre-installed OS, and the original option to change it
1296 * in the BIOS setup screen was removed in later versions.
1297 *
1298 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1299 * this applies to all "701" models (4G/4G Surf/2G Surf).
1300 *
1301 * So Asus made a deliberate decision not to support it on this model.
1302 * We have several reports that using it can cause the system to hang
1303 *
1304 * The hang has also been reported on a "702" (Model name "8G"?).
1305 *
1306 * We avoid dmi_check_system() / dmi_match(), because they use
1307 * substring matching. We don't want to affect the "701SD"
1308 * and "701SDX" models, because they do support S.H.E.
1309 */
1310 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1311 eeepc->cpufv_disabled = true;
1312 pr_info("model %s does not officially support setting cpu speed\n",
1313 model);
1314 pr_info("cpufv disabled to avoid instability\n");
1315 }
1316
1317 /*
1318 * Blacklist for wlan hotplug
1319 *
1320 * Eeepc 1005HA doesn't work like others models and don't need the
1321 * hotplug code. In fact, current hotplug code seems to unplug another
1322 * device...
1323 */
1324 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1325 strcmp(model, "1005PE") == 0) {
1326 eeepc->hotplug_disabled = true;
1327 pr_info("wlan hotplug disabled\n");
1328 }
1329 }
1330
1331 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1332 {
1333 int dummy;
1334
1335 /* Some BIOSes do not report cm although it is available.
1336 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1337 if (!(eeepc->cm_supported & (1 << cm))
1338 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1339 pr_info("%s (%x) not reported by BIOS, enabling anyway\n",
1340 name, 1 << cm);
1341 eeepc->cm_supported |= 1 << cm;
1342 }
1343 }
1344
1345 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1346 {
1347 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1348 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1349 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1350 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1351 }
1352
1353 static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1354 {
1355 unsigned int init_flags;
1356 int result;
1357
1358 result = acpi_bus_get_status(eeepc->device);
1359 if (result)
1360 return result;
1361 if (!eeepc->device->status.present) {
1362 pr_err("Hotkey device not present, aborting\n");
1363 return -ENODEV;
1364 }
1365
1366 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1367 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1368
1369 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1370 pr_err("Hotkey initialization failed\n");
1371 return -ENODEV;
1372 }
1373
1374 /* get control methods supported */
1375 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1376 pr_err("Get control methods supported failed\n");
1377 return -ENODEV;
1378 }
1379 cmsg_quirks(eeepc);
1380 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1381
1382 return 0;
1383 }
1384
1385 static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1386 {
1387 /*
1388 * If the following call to set_acpi() fails, it's because there's no
1389 * camera so we can ignore the error.
1390 */
1391 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1392 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1393 }
1394
1395 static bool eeepc_device_present;
1396
1397 static int eeepc_acpi_add(struct acpi_device *device)
1398 {
1399 struct eeepc_laptop *eeepc;
1400 int result;
1401
1402 pr_notice(EEEPC_LAPTOP_NAME "\n");
1403 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1404 if (!eeepc)
1405 return -ENOMEM;
1406 eeepc->handle = device->handle;
1407 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1408 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1409 device->driver_data = eeepc;
1410 eeepc->device = device;
1411
1412 eeepc->hotplug_disabled = hotplug_disabled;
1413
1414 eeepc_dmi_check(eeepc);
1415
1416 result = eeepc_acpi_init(eeepc);
1417 if (result)
1418 goto fail_platform;
1419 eeepc_enable_camera(eeepc);
1420
1421 /*
1422 * Register the platform device first. It is used as a parent for the
1423 * sub-devices below.
1424 *
1425 * Note that if there are multiple instances of this ACPI device it
1426 * will bail out, because the platform device is registered with a
1427 * fixed name. Of course it doesn't make sense to have more than one,
1428 * and machine-specific scripts find the fixed name convenient. But
1429 * It's also good for us to exclude multiple instances because both
1430 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1431 * (the EC and the wlan PCI slot respectively).
1432 */
1433 result = eeepc_platform_init(eeepc);
1434 if (result)
1435 goto fail_platform;
1436
1437 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1438 result = eeepc_backlight_init(eeepc);
1439 if (result)
1440 goto fail_backlight;
1441 }
1442
1443 result = eeepc_input_init(eeepc);
1444 if (result)
1445 goto fail_input;
1446
1447 result = eeepc_hwmon_init(eeepc);
1448 if (result)
1449 goto fail_hwmon;
1450
1451 result = eeepc_led_init(eeepc);
1452 if (result)
1453 goto fail_led;
1454
1455 result = eeepc_rfkill_init(eeepc);
1456 if (result)
1457 goto fail_rfkill;
1458
1459 eeepc_device_present = true;
1460 return 0;
1461
1462 fail_rfkill:
1463 eeepc_led_exit(eeepc);
1464 fail_led:
1465 fail_hwmon:
1466 eeepc_input_exit(eeepc);
1467 fail_input:
1468 eeepc_backlight_exit(eeepc);
1469 fail_backlight:
1470 eeepc_platform_exit(eeepc);
1471 fail_platform:
1472 kfree(eeepc);
1473
1474 return result;
1475 }
1476
1477 static int eeepc_acpi_remove(struct acpi_device *device)
1478 {
1479 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1480
1481 eeepc_backlight_exit(eeepc);
1482 eeepc_rfkill_exit(eeepc);
1483 eeepc_input_exit(eeepc);
1484 eeepc_led_exit(eeepc);
1485 eeepc_platform_exit(eeepc);
1486
1487 kfree(eeepc);
1488 return 0;
1489 }
1490
1491
1492 static const struct acpi_device_id eeepc_device_ids[] = {
1493 {EEEPC_ACPI_HID, 0},
1494 {"", 0},
1495 };
1496 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1497
1498 static struct acpi_driver eeepc_acpi_driver = {
1499 .name = EEEPC_LAPTOP_NAME,
1500 .class = EEEPC_ACPI_CLASS,
1501 .owner = THIS_MODULE,
1502 .ids = eeepc_device_ids,
1503 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1504 .ops = {
1505 .add = eeepc_acpi_add,
1506 .remove = eeepc_acpi_remove,
1507 .notify = eeepc_acpi_notify,
1508 },
1509 };
1510
1511
1512 static int __init eeepc_laptop_init(void)
1513 {
1514 int result;
1515
1516 result = platform_driver_register(&platform_driver);
1517 if (result < 0)
1518 return result;
1519
1520 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1521 if (result < 0)
1522 goto fail_acpi_driver;
1523
1524 if (!eeepc_device_present) {
1525 result = -ENODEV;
1526 goto fail_no_device;
1527 }
1528
1529 return 0;
1530
1531 fail_no_device:
1532 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1533 fail_acpi_driver:
1534 platform_driver_unregister(&platform_driver);
1535 return result;
1536 }
1537
1538 static void __exit eeepc_laptop_exit(void)
1539 {
1540 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1541 platform_driver_unregister(&platform_driver);
1542 }
1543
1544 module_init(eeepc_laptop_init);
1545 module_exit(eeepc_laptop_exit);
Linux kernel - Deliverables
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