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Linux 4.19.133
[linux/fpc-iii.git] / drivers / platform / x86 / eeepc-laptop.c
bloba4bbf6ecd1f08d185282d348d50f239d8efb305a
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_IGNORE, 0x50, { KEY_RESERVED } }, /* AC plugged */
154 { KE_IGNORE, 0x51, { KEY_RESERVED } }, /* AC unplugged */
155 { KE_END, 0 },
156 };
157
158 /*
159 * This is the main structure, we can use it to store useful information
160 */
161 struct eeepc_laptop {
162 acpi_handle handle; /* the handle of the acpi device */
163 u32 cm_supported; /* the control methods supported
164 by this BIOS */
165 bool cpufv_disabled;
166 bool hotplug_disabled;
167 u16 event_count[128]; /* count for each event */
168
169 struct platform_device *platform_device;
170 struct acpi_device *device; /* the device we are in */
171 struct backlight_device *backlight_device;
172
173 struct input_dev *inputdev;
174
175 struct rfkill *wlan_rfkill;
176 struct rfkill *bluetooth_rfkill;
177 struct rfkill *wwan3g_rfkill;
178 struct rfkill *wimax_rfkill;
179
180 struct hotplug_slot *hotplug_slot;
181 struct mutex hotplug_lock;
182
183 struct led_classdev tpd_led;
184 int tpd_led_wk;
185 struct workqueue_struct *led_workqueue;
186 struct work_struct tpd_led_work;
187 };
188
189 /*
190 * ACPI Helpers
191 */
192 static int write_acpi_int(acpi_handle handle, const char *method, int val)
193 {
194 acpi_status status;
195
196 status = acpi_execute_simple_method(handle, (char *)method, val);
197
198 return (status == AE_OK ? 0 : -1);
199 }
200
201 static int read_acpi_int(acpi_handle handle, const char *method, int *val)
202 {
203 acpi_status status;
204 unsigned long long result;
205
206 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
207 if (ACPI_FAILURE(status)) {
208 *val = -1;
209 return -1;
210 } else {
211 *val = result;
212 return 0;
213 }
214 }
215
216 static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
217 {
218 const char *method = cm_setv[cm];
219
220 if (method == NULL)
221 return -ENODEV;
222 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
223 return -ENODEV;
224
225 if (write_acpi_int(eeepc->handle, method, value))
226 pr_warn("Error writing %s\n", method);
227 return 0;
228 }
229
230 static int get_acpi(struct eeepc_laptop *eeepc, int cm)
231 {
232 const char *method = cm_getv[cm];
233 int value;
234
235 if (method == NULL)
236 return -ENODEV;
237 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
238 return -ENODEV;
239
240 if (read_acpi_int(eeepc->handle, method, &value))
241 pr_warn("Error reading %s\n", method);
242 return value;
243 }
244
245 static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
246 acpi_handle *handle)
247 {
248 const char *method = cm_setv[cm];
249 acpi_status status;
250
251 if (method == NULL)
252 return -ENODEV;
253 if ((eeepc->cm_supported & (0x1 << cm)) == 0)
254 return -ENODEV;
255
256 status = acpi_get_handle(eeepc->handle, (char *)method,
257 handle);
258 if (status != AE_OK) {
259 pr_warn("Error finding %s\n", method);
260 return -ENODEV;
261 }
262 return 0;
263 }
264
265
266 /*
267 * Sys helpers
268 */
269 static int parse_arg(const char *buf, int *val)
270 {
271 if (sscanf(buf, "%i", val) != 1)
272 return -EINVAL;
273 return 0;
274 }
275
276 static ssize_t store_sys_acpi(struct device *dev, int cm,
277 const char *buf, size_t count)
278 {
279 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
280 int rv, value;
281
282 rv = parse_arg(buf, &value);
283 if (rv < 0)
284 return rv;
285 rv = set_acpi(eeepc, cm, value);
286 if (rv < 0)
287 return -EIO;
288 return count;
289 }
290
291 static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
292 {
293 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
294 int value = get_acpi(eeepc, cm);
295
296 if (value < 0)
297 return -EIO;
298 return sprintf(buf, "%d\n", value);
299 }
300
301 #define EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
302 static ssize_t _name##_show(struct device *dev, \
303 struct device_attribute *attr, \
304 char *buf) \
305 { \
306 return show_sys_acpi(dev, _cm, buf); \
307 }
308
309 #define EEEPC_ACPI_STORE_FUNC(_name, _cm) \
310 static ssize_t _name##_store(struct device *dev, \
311 struct device_attribute *attr, \
312 const char *buf, size_t count) \
313 { \
314 return store_sys_acpi(dev, _cm, buf, count); \
315 }
316
317 #define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm) \
318 EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
319 EEEPC_ACPI_STORE_FUNC(_name, _cm) \
320 static DEVICE_ATTR_RW(_name)
321
322 #define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm) \
323 EEEPC_ACPI_STORE_FUNC(_name, _cm) \
324 static DEVICE_ATTR_WO(_name)
325
326 EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA);
327 EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER);
328 EEEPC_CREATE_DEVICE_ATTR_WO(disp, CM_ASL_DISPLAYSWITCH);
329
330 struct eeepc_cpufv {
331 int num;
332 int cur;
333 };
334
335 static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
336 {
337 c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
338 if (c->cur < 0)
339 return -ENODEV;
340
341 c->num = (c->cur >> 8) & 0xff;
342 c->cur &= 0xff;
343 if (c->num == 0 || c->num > 12)
344 return -ENODEV;
345 return 0;
346 }
347
348 static ssize_t available_cpufv_show(struct device *dev,
349 struct device_attribute *attr,
350 char *buf)
351 {
352 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
353 struct eeepc_cpufv c;
354 int i;
355 ssize_t len = 0;
356
357 if (get_cpufv(eeepc, &c))
358 return -ENODEV;
359 for (i = 0; i < c.num; i++)
360 len += sprintf(buf + len, "%d ", i);
361 len += sprintf(buf + len, "\n");
362 return len;
363 }
364
365 static ssize_t cpufv_show(struct device *dev,
366 struct device_attribute *attr,
367 char *buf)
368 {
369 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
370 struct eeepc_cpufv c;
371
372 if (get_cpufv(eeepc, &c))
373 return -ENODEV;
374 return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
375 }
376
377 static ssize_t cpufv_store(struct device *dev,
378 struct device_attribute *attr,
379 const char *buf, size_t count)
380 {
381 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
382 struct eeepc_cpufv c;
383 int rv, value;
384
385 if (eeepc->cpufv_disabled)
386 return -EPERM;
387 if (get_cpufv(eeepc, &c))
388 return -ENODEV;
389 rv = parse_arg(buf, &value);
390 if (rv < 0)
391 return rv;
392 if (value < 0 || value >= c.num)
393 return -EINVAL;
394 rv = set_acpi(eeepc, CM_ASL_CPUFV, value);
395 if (rv)
396 return rv;
397 return count;
398 }
399
400 static ssize_t cpufv_disabled_show(struct device *dev,
401 struct device_attribute *attr,
402 char *buf)
403 {
404 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
405
406 return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
407 }
408
409 static ssize_t cpufv_disabled_store(struct device *dev,
410 struct device_attribute *attr,
411 const char *buf, size_t count)
412 {
413 struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
414 int rv, value;
415
416 rv = parse_arg(buf, &value);
417 if (rv < 0)
418 return rv;
419
420 switch (value) {
421 case 0:
422 if (eeepc->cpufv_disabled)
423 pr_warn("cpufv enabled (not officially supported on this model)\n");
424 eeepc->cpufv_disabled = false;
425 return count;
426 case 1:
427 return -EPERM;
428 default:
429 return -EINVAL;
430 }
431 }
432
433
434 static DEVICE_ATTR_RW(cpufv);
435 static DEVICE_ATTR_RO(available_cpufv);
436 static DEVICE_ATTR_RW(cpufv_disabled);
437
438 static struct attribute *platform_attributes[] = {
439 &dev_attr_camera.attr,
440 &dev_attr_cardr.attr,
441 &dev_attr_disp.attr,
442 &dev_attr_cpufv.attr,
443 &dev_attr_available_cpufv.attr,
444 &dev_attr_cpufv_disabled.attr,
445 NULL
446 };
447
448 static const struct attribute_group platform_attribute_group = {
449 .attrs = platform_attributes
450 };
451
452 static int eeepc_platform_init(struct eeepc_laptop *eeepc)
453 {
454 int result;
455
456 eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
457 if (!eeepc->platform_device)
458 return -ENOMEM;
459 platform_set_drvdata(eeepc->platform_device, eeepc);
460
461 result = platform_device_add(eeepc->platform_device);
462 if (result)
463 goto fail_platform_device;
464
465 result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
466 &platform_attribute_group);
467 if (result)
468 goto fail_sysfs;
469 return 0;
470
471 fail_sysfs:
472 platform_device_del(eeepc->platform_device);
473 fail_platform_device:
474 platform_device_put(eeepc->platform_device);
475 return result;
476 }
477
478 static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
479 {
480 sysfs_remove_group(&eeepc->platform_device->dev.kobj,
481 &platform_attribute_group);
482 platform_device_unregister(eeepc->platform_device);
483 }
484
485 /*
486 * LEDs
487 */
488 /*
489 * These functions actually update the LED's, and are called from a
490 * workqueue. By doing this as separate work rather than when the LED
491 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
492 * potentially bad time, such as a timer interrupt.
493 */
494 static void tpd_led_update(struct work_struct *work)
495 {
496 struct eeepc_laptop *eeepc;
497
498 eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
499
500 set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
501 }
502
503 static void tpd_led_set(struct led_classdev *led_cdev,
504 enum led_brightness value)
505 {
506 struct eeepc_laptop *eeepc;
507
508 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
509
510 eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
511 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
512 }
513
514 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
515 {
516 struct eeepc_laptop *eeepc;
517
518 eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
519
520 return get_acpi(eeepc, CM_ASL_TPD);
521 }
522
523 static int eeepc_led_init(struct eeepc_laptop *eeepc)
524 {
525 int rv;
526
527 if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
528 return 0;
529
530 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
531 if (!eeepc->led_workqueue)
532 return -ENOMEM;
533 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
534
535 eeepc->tpd_led.name = "eeepc::touchpad";
536 eeepc->tpd_led.brightness_set = tpd_led_set;
537 if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
538 eeepc->tpd_led.brightness_get = tpd_led_get;
539 eeepc->tpd_led.max_brightness = 1;
540
541 rv = led_classdev_register(&eeepc->platform_device->dev,
542 &eeepc->tpd_led);
543 if (rv) {
544 destroy_workqueue(eeepc->led_workqueue);
545 return rv;
546 }
547
548 return 0;
549 }
550
551 static void eeepc_led_exit(struct eeepc_laptop *eeepc)
552 {
553 if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev))
554 led_classdev_unregister(&eeepc->tpd_led);
555 if (eeepc->led_workqueue)
556 destroy_workqueue(eeepc->led_workqueue);
557 }
558
559
560 /*
561 * PCI hotplug (for wlan rfkill)
562 */
563 static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
564 {
565 if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
566 return false;
567 return true;
568 }
569
570 static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
571 {
572 struct pci_dev *port;
573 struct pci_dev *dev;
574 struct pci_bus *bus;
575 bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
576 bool absent;
577 u32 l;
578
579 if (eeepc->wlan_rfkill)
580 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
581
582 mutex_lock(&eeepc->hotplug_lock);
583 pci_lock_rescan_remove();
584
585 if (!eeepc->hotplug_slot)
586 goto out_unlock;
587
588 port = acpi_get_pci_dev(handle);
589 if (!port) {
590 pr_warning("Unable to find port\n");
591 goto out_unlock;
592 }
593
594 bus = port->subordinate;
595
596 if (!bus) {
597 pr_warn("Unable to find PCI bus 1?\n");
598 goto out_put_dev;
599 }
600
601 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
602 pr_err("Unable to read PCI config space?\n");
603 goto out_put_dev;
604 }
605
606 absent = (l == 0xffffffff);
607
608 if (blocked != absent) {
609 pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n",
610 blocked ? "blocked" : "unblocked",
611 absent ? "absent" : "present");
612 pr_warn("skipped wireless hotplug as probably inappropriate for this model\n");
613 goto out_put_dev;
614 }
615
616 if (!blocked) {
617 dev = pci_get_slot(bus, 0);
618 if (dev) {
619 /* Device already present */
620 pci_dev_put(dev);
621 goto out_put_dev;
622 }
623 dev = pci_scan_single_device(bus, 0);
624 if (dev) {
625 pci_bus_assign_resources(bus);
626 pci_bus_add_device(dev);
627 }
628 } else {
629 dev = pci_get_slot(bus, 0);
630 if (dev) {
631 pci_stop_and_remove_bus_device(dev);
632 pci_dev_put(dev);
633 }
634 }
635 out_put_dev:
636 pci_dev_put(port);
637
638 out_unlock:
639 pci_unlock_rescan_remove();
640 mutex_unlock(&eeepc->hotplug_lock);
641 }
642
643 static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
644 {
645 acpi_status status = AE_OK;
646 acpi_handle handle;
647
648 status = acpi_get_handle(NULL, node, &handle);
649
650 if (ACPI_SUCCESS(status))
651 eeepc_rfkill_hotplug(eeepc, handle);
652 }
653
654 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
655 {
656 struct eeepc_laptop *eeepc = data;
657
658 if (event != ACPI_NOTIFY_BUS_CHECK)
659 return;
660
661 eeepc_rfkill_hotplug(eeepc, handle);
662 }
663
664 static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
665 char *node)
666 {
667 acpi_status status;
668 acpi_handle handle;
669
670 status = acpi_get_handle(NULL, node, &handle);
671
672 if (ACPI_FAILURE(status))
673 return -ENODEV;
674
675 status = acpi_install_notify_handler(handle,
676 ACPI_SYSTEM_NOTIFY,
677 eeepc_rfkill_notify,
678 eeepc);
679 if (ACPI_FAILURE(status))
680 pr_warn("Failed to register notify on %s\n", node);
681
682 /*
683 * Refresh pci hotplug in case the rfkill state was
684 * changed during setup.
685 */
686 eeepc_rfkill_hotplug(eeepc, handle);
687 return 0;
688 }
689
690 static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
691 char *node)
692 {
693 acpi_status status = AE_OK;
694 acpi_handle handle;
695
696 status = acpi_get_handle(NULL, node, &handle);
697
698 if (ACPI_FAILURE(status))
699 return;
700
701 status = acpi_remove_notify_handler(handle,
702 ACPI_SYSTEM_NOTIFY,
703 eeepc_rfkill_notify);
704 if (ACPI_FAILURE(status))
705 pr_err("Error removing rfkill notify handler %s\n",
706 node);
707 /*
708 * Refresh pci hotplug in case the rfkill
709 * state was changed after
710 * eeepc_unregister_rfkill_notifier()
711 */
712 eeepc_rfkill_hotplug(eeepc, handle);
713 }
714
715 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
716 u8 *value)
717 {
718 struct eeepc_laptop *eeepc = hotplug_slot->private;
719 int val = get_acpi(eeepc, CM_ASL_WLAN);
720
721 if (val == 1 || val == 0)
722 *value = val;
723 else
724 return -EINVAL;
725
726 return 0;
727 }
728
729 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
730 .owner = THIS_MODULE,
731 .get_adapter_status = eeepc_get_adapter_status,
732 .get_power_status = eeepc_get_adapter_status,
733 };
734
735 static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
736 {
737 int ret = -ENOMEM;
738 struct pci_bus *bus = pci_find_bus(0, 1);
739
740 if (!bus) {
741 pr_err("Unable to find wifi PCI bus\n");
742 return -ENODEV;
743 }
744
745 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
746 if (!eeepc->hotplug_slot)
747 goto error_slot;
748
749 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
750 GFP_KERNEL);
751 if (!eeepc->hotplug_slot->info)
752 goto error_info;
753
754 eeepc->hotplug_slot->private = eeepc;
755 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
756 eeepc_get_adapter_status(eeepc->hotplug_slot,
757 &eeepc->hotplug_slot->info->adapter_status);
758
759 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
760 if (ret) {
761 pr_err("Unable to register hotplug slot - %d\n", ret);
762 goto error_register;
763 }
764
765 return 0;
766
767 error_register:
768 kfree(eeepc->hotplug_slot->info);
769 error_info:
770 kfree(eeepc->hotplug_slot);
771 eeepc->hotplug_slot = NULL;
772 error_slot:
773 return ret;
774 }
775
776 /*
777 * Rfkill devices
778 */
779 static int eeepc_rfkill_set(void *data, bool blocked)
780 {
781 acpi_handle handle = data;
782
783 return write_acpi_int(handle, NULL, !blocked);
784 }
785
786 static const struct rfkill_ops eeepc_rfkill_ops = {
787 .set_block = eeepc_rfkill_set,
788 };
789
790 static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
791 struct rfkill **rfkill,
792 const char *name,
793 enum rfkill_type type, int cm)
794 {
795 acpi_handle handle;
796 int result;
797
798 result = acpi_setter_handle(eeepc, cm, &handle);
799 if (result < 0)
800 return result;
801
802 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
803 &eeepc_rfkill_ops, handle);
804
805 if (!*rfkill)
806 return -EINVAL;
807
808 rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
809 result = rfkill_register(*rfkill);
810 if (result) {
811 rfkill_destroy(*rfkill);
812 *rfkill = NULL;
813 return result;
814 }
815 return 0;
816 }
817
818 static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
819 static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
820 static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
821
822 static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
823 {
824 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
825 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
826 eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
827 if (eeepc->wlan_rfkill) {
828 rfkill_unregister(eeepc->wlan_rfkill);
829 rfkill_destroy(eeepc->wlan_rfkill);
830 eeepc->wlan_rfkill = NULL;
831 }
832
833 if (eeepc->hotplug_slot) {
834 pci_hp_deregister(eeepc->hotplug_slot);
835 kfree(eeepc->hotplug_slot->info);
836 kfree(eeepc->hotplug_slot);
837 }
838
839 if (eeepc->bluetooth_rfkill) {
840 rfkill_unregister(eeepc->bluetooth_rfkill);
841 rfkill_destroy(eeepc->bluetooth_rfkill);
842 eeepc->bluetooth_rfkill = NULL;
843 }
844 if (eeepc->wwan3g_rfkill) {
845 rfkill_unregister(eeepc->wwan3g_rfkill);
846 rfkill_destroy(eeepc->wwan3g_rfkill);
847 eeepc->wwan3g_rfkill = NULL;
848 }
849 if (eeepc->wimax_rfkill) {
850 rfkill_unregister(eeepc->wimax_rfkill);
851 rfkill_destroy(eeepc->wimax_rfkill);
852 eeepc->wimax_rfkill = NULL;
853 }
854 }
855
856 static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
857 {
858 int result = 0;
859
860 mutex_init(&eeepc->hotplug_lock);
861
862 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
863 "eeepc-wlan", RFKILL_TYPE_WLAN,
864 CM_ASL_WLAN);
865
866 if (result && result != -ENODEV)
867 goto exit;
868
869 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
870 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
871 CM_ASL_BLUETOOTH);
872
873 if (result && result != -ENODEV)
874 goto exit;
875
876 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
877 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
878 CM_ASL_3G);
879
880 if (result && result != -ENODEV)
881 goto exit;
882
883 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
884 "eeepc-wimax", RFKILL_TYPE_WIMAX,
885 CM_ASL_WIMAX);
886
887 if (result && result != -ENODEV)
888 goto exit;
889
890 if (eeepc->hotplug_disabled)
891 return 0;
892
893 result = eeepc_setup_pci_hotplug(eeepc);
894 /*
895 * If we get -EBUSY then something else is handling the PCI hotplug -
896 * don't fail in this case
897 */
898 if (result == -EBUSY)
899 result = 0;
900
901 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
902 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
903 eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
904
905 exit:
906 if (result && result != -ENODEV)
907 eeepc_rfkill_exit(eeepc);
908 return result;
909 }
910
911 /*
912 * Platform driver - hibernate/resume callbacks
913 */
914 static int eeepc_hotk_thaw(struct device *device)
915 {
916 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
917
918 if (eeepc->wlan_rfkill) {
919 int wlan;
920
921 /*
922 * Work around bios bug - acpi _PTS turns off the wireless led
923 * during suspend. Normally it restores it on resume, but
924 * we should kick it ourselves in case hibernation is aborted.
925 */
926 wlan = get_acpi(eeepc, CM_ASL_WLAN);
927 if (wlan >= 0)
928 set_acpi(eeepc, CM_ASL_WLAN, wlan);
929 }
930
931 return 0;
932 }
933
934 static int eeepc_hotk_restore(struct device *device)
935 {
936 struct eeepc_laptop *eeepc = dev_get_drvdata(device);
937
938 /* Refresh both wlan rfkill state and pci hotplug */
939 if (eeepc->wlan_rfkill) {
940 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1);
941 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
942 eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
943 }
944
945 if (eeepc->bluetooth_rfkill)
946 rfkill_set_sw_state(eeepc->bluetooth_rfkill,
947 get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
948 if (eeepc->wwan3g_rfkill)
949 rfkill_set_sw_state(eeepc->wwan3g_rfkill,
950 get_acpi(eeepc, CM_ASL_3G) != 1);
951 if (eeepc->wimax_rfkill)
952 rfkill_set_sw_state(eeepc->wimax_rfkill,
953 get_acpi(eeepc, CM_ASL_WIMAX) != 1);
954
955 return 0;
956 }
957
958 static const struct dev_pm_ops eeepc_pm_ops = {
959 .thaw = eeepc_hotk_thaw,
960 .restore = eeepc_hotk_restore,
961 };
962
963 static struct platform_driver platform_driver = {
964 .driver = {
965 .name = EEEPC_LAPTOP_FILE,
966 .pm = &eeepc_pm_ops,
967 }
968 };
969
970 /*
971 * Hwmon device
972 */
973
974 #define EEEPC_EC_SC00 0x61
975 #define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
976 #define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
977 #define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
978
979 #define EEEPC_EC_SFB0 0xD0
980 #define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
981
982 static inline int eeepc_pwm_to_lmsensors(int value)
983 {
984 return value * 255 / 100;
985 }
986
987 static inline int eeepc_lmsensors_to_pwm(int value)
988 {
989 value = clamp_val(value, 0, 255);
990 return value * 100 / 255;
991 }
992
993 static int eeepc_get_fan_pwm(void)
994 {
995 u8 value = 0;
996
997 ec_read(EEEPC_EC_FAN_PWM, &value);
998 return eeepc_pwm_to_lmsensors(value);
999 }
1000
1001 static void eeepc_set_fan_pwm(int value)
1002 {
1003 value = eeepc_lmsensors_to_pwm(value);
1004 ec_write(EEEPC_EC_FAN_PWM, value);
1005 }
1006
1007 static int eeepc_get_fan_rpm(void)
1008 {
1009 u8 high = 0;
1010 u8 low = 0;
1011
1012 ec_read(EEEPC_EC_FAN_HRPM, &high);
1013 ec_read(EEEPC_EC_FAN_LRPM, &low);
1014 return high << 8 | low;
1015 }
1016
1017 #define EEEPC_EC_FAN_CTRL_BIT 0x02
1018 #define EEEPC_FAN_CTRL_MANUAL 1
1019 #define EEEPC_FAN_CTRL_AUTO 2
1020
1021 static int eeepc_get_fan_ctrl(void)
1022 {
1023 u8 value = 0;
1024
1025 ec_read(EEEPC_EC_FAN_CTRL, &value);
1026 if (value & EEEPC_EC_FAN_CTRL_BIT)
1027 return EEEPC_FAN_CTRL_MANUAL;
1028 else
1029 return EEEPC_FAN_CTRL_AUTO;
1030 }
1031
1032 static void eeepc_set_fan_ctrl(int manual)
1033 {
1034 u8 value = 0;
1035
1036 ec_read(EEEPC_EC_FAN_CTRL, &value);
1037 if (manual == EEEPC_FAN_CTRL_MANUAL)
1038 value |= EEEPC_EC_FAN_CTRL_BIT;
1039 else
1040 value &= ~EEEPC_EC_FAN_CTRL_BIT;
1041 ec_write(EEEPC_EC_FAN_CTRL, value);
1042 }
1043
1044 static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
1045 {
1046 int rv, value;
1047
1048 rv = parse_arg(buf, &value);
1049 if (rv < 0)
1050 return rv;
1051 set(value);
1052 return count;
1053 }
1054
1055 static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
1056 {
1057 return sprintf(buf, "%d\n", get());
1058 }
1059
1060 #define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1061 static ssize_t _name##_show(struct device *dev, \
1062 struct device_attribute *attr, \
1063 char *buf) \
1064 { \
1065 return show_sys_hwmon(_get, buf); \
1066 }
1067
1068 #define EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1069 static ssize_t _name##_store(struct device *dev, \
1070 struct device_attribute *attr, \
1071 const char *buf, size_t count) \
1072 { \
1073 return store_sys_hwmon(_set, buf, count); \
1074 }
1075
1076 #define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \
1077 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1078 EEEPC_SENSOR_STORE_FUNC(_name, _set) \
1079 static DEVICE_ATTR_RW(_name)
1080
1081 #define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \
1082 EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
1083 static DEVICE_ATTR_RO(_name)
1084
1085 EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
1086 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
1087 eeepc_set_fan_pwm);
1088 EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
1089 eeepc_set_fan_ctrl);
1090
1091 static struct attribute *hwmon_attrs[] = {
1092 &dev_attr_pwm1.attr,
1093 &dev_attr_fan1_input.attr,
1094 &dev_attr_pwm1_enable.attr,
1095 NULL
1096 };
1097 ATTRIBUTE_GROUPS(hwmon);
1098
1099 static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
1100 {
1101 struct device *dev = &eeepc->platform_device->dev;
1102 struct device *hwmon;
1103
1104 hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
1105 hwmon_groups);
1106 if (IS_ERR(hwmon)) {
1107 pr_err("Could not register eeepc hwmon device\n");
1108 return PTR_ERR(hwmon);
1109 }
1110 return 0;
1111 }
1112
1113 /*
1114 * Backlight device
1115 */
1116 static int read_brightness(struct backlight_device *bd)
1117 {
1118 struct eeepc_laptop *eeepc = bl_get_data(bd);
1119
1120 return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
1121 }
1122
1123 static int set_brightness(struct backlight_device *bd, int value)
1124 {
1125 struct eeepc_laptop *eeepc = bl_get_data(bd);
1126
1127 return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
1128 }
1129
1130 static int update_bl_status(struct backlight_device *bd)
1131 {
1132 return set_brightness(bd, bd->props.brightness);
1133 }
1134
1135 static const struct backlight_ops eeepcbl_ops = {
1136 .get_brightness = read_brightness,
1137 .update_status = update_bl_status,
1138 };
1139
1140 static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
1141 {
1142 struct backlight_device *bd = eeepc->backlight_device;
1143 int old = bd->props.brightness;
1144
1145 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1146
1147 return old;
1148 }
1149
1150 static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
1151 {
1152 struct backlight_properties props;
1153 struct backlight_device *bd;
1154
1155 memset(&props, 0, sizeof(struct backlight_properties));
1156 props.type = BACKLIGHT_PLATFORM;
1157 props.max_brightness = 15;
1158 bd = backlight_device_register(EEEPC_LAPTOP_FILE,
1159 &eeepc->platform_device->dev, eeepc,
1160 &eeepcbl_ops, &props);
1161 if (IS_ERR(bd)) {
1162 pr_err("Could not register eeepc backlight device\n");
1163 eeepc->backlight_device = NULL;
1164 return PTR_ERR(bd);
1165 }
1166 eeepc->backlight_device = bd;
1167 bd->props.brightness = read_brightness(bd);
1168 bd->props.power = FB_BLANK_UNBLANK;
1169 backlight_update_status(bd);
1170 return 0;
1171 }
1172
1173 static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
1174 {
1175 backlight_device_unregister(eeepc->backlight_device);
1176 eeepc->backlight_device = NULL;
1177 }
1178
1179
1180 /*
1181 * Input device (i.e. hotkeys)
1182 */
1183 static int eeepc_input_init(struct eeepc_laptop *eeepc)
1184 {
1185 struct input_dev *input;
1186 int error;
1187
1188 input = input_allocate_device();
1189 if (!input)
1190 return -ENOMEM;
1191
1192 input->name = "Asus EeePC extra buttons";
1193 input->phys = EEEPC_LAPTOP_FILE "/input0";
1194 input->id.bustype = BUS_HOST;
1195 input->dev.parent = &eeepc->platform_device->dev;
1196
1197 error = sparse_keymap_setup(input, eeepc_keymap, NULL);
1198 if (error) {
1199 pr_err("Unable to setup input device keymap\n");
1200 goto err_free_dev;
1201 }
1202
1203 error = input_register_device(input);
1204 if (error) {
1205 pr_err("Unable to register input device\n");
1206 goto err_free_dev;
1207 }
1208
1209 eeepc->inputdev = input;
1210 return 0;
1211
1212 err_free_dev:
1213 input_free_device(input);
1214 return error;
1215 }
1216
1217 static void eeepc_input_exit(struct eeepc_laptop *eeepc)
1218 {
1219 if (eeepc->inputdev)
1220 input_unregister_device(eeepc->inputdev);
1221 eeepc->inputdev = NULL;
1222 }
1223
1224 /*
1225 * ACPI driver
1226 */
1227 static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
1228 {
1229 if (!eeepc->inputdev)
1230 return;
1231 if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
1232 pr_info("Unknown key %x pressed\n", event);
1233 }
1234
1235 static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
1236 {
1237 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1238 int old_brightness, new_brightness;
1239 u16 count;
1240
1241 if (event > ACPI_MAX_SYS_NOTIFY)
1242 return;
1243 count = eeepc->event_count[event % 128]++;
1244 acpi_bus_generate_netlink_event(device->pnp.device_class,
1245 dev_name(&device->dev), event,
1246 count);
1247
1248 /* Brightness events are special */
1249 if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) {
1250 eeepc_input_notify(eeepc, event);
1251 return;
1252 }
1253
1254 /* Ignore them completely if the acpi video driver is used */
1255 if (!eeepc->backlight_device)
1256 return;
1257
1258 /* Update the backlight device. */
1259 old_brightness = eeepc_backlight_notify(eeepc);
1260
1261 /* Convert event to keypress (obsolescent hack) */
1262 new_brightness = event - NOTIFY_BRN_MIN;
1263
1264 if (new_brightness < old_brightness) {
1265 event = NOTIFY_BRN_MIN; /* brightness down */
1266 } else if (new_brightness > old_brightness) {
1267 event = NOTIFY_BRN_MAX; /* brightness up */
1268 } else {
1269 /*
1270 * no change in brightness - already at min/max,
1271 * event will be desired value (or else ignored)
1272 */
1273 }
1274 eeepc_input_notify(eeepc, event);
1275 }
1276
1277 static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
1278 {
1279 const char *model;
1280
1281 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1282 if (!model)
1283 return;
1284
1285 /*
1286 * Blacklist for setting cpufv (cpu speed).
1287 *
1288 * EeePC 4G ("701") implements CFVS, but it is not supported
1289 * by the pre-installed OS, and the original option to change it
1290 * in the BIOS setup screen was removed in later versions.
1291 *
1292 * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
1293 * this applies to all "701" models (4G/4G Surf/2G Surf).
1294 *
1295 * So Asus made a deliberate decision not to support it on this model.
1296 * We have several reports that using it can cause the system to hang
1297 *
1298 * The hang has also been reported on a "702" (Model name "8G"?).
1299 *
1300 * We avoid dmi_check_system() / dmi_match(), because they use
1301 * substring matching. We don't want to affect the "701SD"
1302 * and "701SDX" models, because they do support S.H.E.
1303 */
1304 if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
1305 eeepc->cpufv_disabled = true;
1306 pr_info("model %s does not officially support setting cpu speed\n",
1307 model);
1308 pr_info("cpufv disabled to avoid instability\n");
1309 }
1310
1311 /*
1312 * Blacklist for wlan hotplug
1313 *
1314 * Eeepc 1005HA doesn't work like others models and don't need the
1315 * hotplug code. In fact, current hotplug code seems to unplug another
1316 * device...
1317 */
1318 if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
1319 strcmp(model, "1005PE") == 0) {
1320 eeepc->hotplug_disabled = true;
1321 pr_info("wlan hotplug disabled\n");
1322 }
1323 }
1324
1325 static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
1326 {
1327 int dummy;
1328
1329 /* Some BIOSes do not report cm although it is available.
1330 Check if cm_getv[cm] works and, if yes, assume cm should be set. */
1331 if (!(eeepc->cm_supported & (1 << cm))
1332 && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
1333 pr_info("%s (%x) not reported by BIOS, enabling anyway\n",
1334 name, 1 << cm);
1335 eeepc->cm_supported |= 1 << cm;
1336 }
1337 }
1338
1339 static void cmsg_quirks(struct eeepc_laptop *eeepc)
1340 {
1341 cmsg_quirk(eeepc, CM_ASL_LID, "LID");
1342 cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
1343 cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
1344 cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
1345 }
1346
1347 static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
1348 {
1349 unsigned int init_flags;
1350 int result;
1351
1352 result = acpi_bus_get_status(eeepc->device);
1353 if (result)
1354 return result;
1355 if (!eeepc->device->status.present) {
1356 pr_err("Hotkey device not present, aborting\n");
1357 return -ENODEV;
1358 }
1359
1360 init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
1361 pr_notice("Hotkey init flags 0x%x\n", init_flags);
1362
1363 if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
1364 pr_err("Hotkey initialization failed\n");
1365 return -ENODEV;
1366 }
1367
1368 /* get control methods supported */
1369 if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
1370 pr_err("Get control methods supported failed\n");
1371 return -ENODEV;
1372 }
1373 cmsg_quirks(eeepc);
1374 pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
1375
1376 return 0;
1377 }
1378
1379 static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
1380 {
1381 /*
1382 * If the following call to set_acpi() fails, it's because there's no
1383 * camera so we can ignore the error.
1384 */
1385 if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
1386 set_acpi(eeepc, CM_ASL_CAMERA, 1);
1387 }
1388
1389 static bool eeepc_device_present;
1390
1391 static int eeepc_acpi_add(struct acpi_device *device)
1392 {
1393 struct eeepc_laptop *eeepc;
1394 int result;
1395
1396 pr_notice(EEEPC_LAPTOP_NAME "\n");
1397 eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
1398 if (!eeepc)
1399 return -ENOMEM;
1400 eeepc->handle = device->handle;
1401 strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
1402 strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
1403 device->driver_data = eeepc;
1404 eeepc->device = device;
1405
1406 eeepc->hotplug_disabled = hotplug_disabled;
1407
1408 eeepc_dmi_check(eeepc);
1409
1410 result = eeepc_acpi_init(eeepc);
1411 if (result)
1412 goto fail_platform;
1413 eeepc_enable_camera(eeepc);
1414
1415 /*
1416 * Register the platform device first. It is used as a parent for the
1417 * sub-devices below.
1418 *
1419 * Note that if there are multiple instances of this ACPI device it
1420 * will bail out, because the platform device is registered with a
1421 * fixed name. Of course it doesn't make sense to have more than one,
1422 * and machine-specific scripts find the fixed name convenient. But
1423 * It's also good for us to exclude multiple instances because both
1424 * our hwmon and our wlan rfkill subdevice use global ACPI objects
1425 * (the EC and the wlan PCI slot respectively).
1426 */
1427 result = eeepc_platform_init(eeepc);
1428 if (result)
1429 goto fail_platform;
1430
1431 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1432 result = eeepc_backlight_init(eeepc);
1433 if (result)
1434 goto fail_backlight;
1435 }
1436
1437 result = eeepc_input_init(eeepc);
1438 if (result)
1439 goto fail_input;
1440
1441 result = eeepc_hwmon_init(eeepc);
1442 if (result)
1443 goto fail_hwmon;
1444
1445 result = eeepc_led_init(eeepc);
1446 if (result)
1447 goto fail_led;
1448
1449 result = eeepc_rfkill_init(eeepc);
1450 if (result)
1451 goto fail_rfkill;
1452
1453 eeepc_device_present = true;
1454 return 0;
1455
1456 fail_rfkill:
1457 eeepc_led_exit(eeepc);
1458 fail_led:
1459 fail_hwmon:
1460 eeepc_input_exit(eeepc);
1461 fail_input:
1462 eeepc_backlight_exit(eeepc);
1463 fail_backlight:
1464 eeepc_platform_exit(eeepc);
1465 fail_platform:
1466 kfree(eeepc);
1467
1468 return result;
1469 }
1470
1471 static int eeepc_acpi_remove(struct acpi_device *device)
1472 {
1473 struct eeepc_laptop *eeepc = acpi_driver_data(device);
1474
1475 eeepc_backlight_exit(eeepc);
1476 eeepc_rfkill_exit(eeepc);
1477 eeepc_input_exit(eeepc);
1478 eeepc_led_exit(eeepc);
1479 eeepc_platform_exit(eeepc);
1480
1481 kfree(eeepc);
1482 return 0;
1483 }
1484
1485
1486 static const struct acpi_device_id eeepc_device_ids[] = {
1487 {EEEPC_ACPI_HID, 0},
1488 {"", 0},
1489 };
1490 MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
1491
1492 static struct acpi_driver eeepc_acpi_driver = {
1493 .name = EEEPC_LAPTOP_NAME,
1494 .class = EEEPC_ACPI_CLASS,
1495 .owner = THIS_MODULE,
1496 .ids = eeepc_device_ids,
1497 .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
1498 .ops = {
1499 .add = eeepc_acpi_add,
1500 .remove = eeepc_acpi_remove,
1501 .notify = eeepc_acpi_notify,
1502 },
1503 };
1504
1505
1506 static int __init eeepc_laptop_init(void)
1507 {
1508 int result;
1509
1510 result = platform_driver_register(&platform_driver);
1511 if (result < 0)
1512 return result;
1513
1514 result = acpi_bus_register_driver(&eeepc_acpi_driver);
1515 if (result < 0)
1516 goto fail_acpi_driver;
1517
1518 if (!eeepc_device_present) {
1519 result = -ENODEV;
1520 goto fail_no_device;
1521 }
1522
1523 return 0;
1524
1525 fail_no_device:
1526 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1527 fail_acpi_driver:
1528 platform_driver_unregister(&platform_driver);
1529 return result;
1530 }
1531
1532 static void __exit eeepc_laptop_exit(void)
1533 {
1534 acpi_bus_unregister_driver(&eeepc_acpi_driver);
1535 platform_driver_unregister(&platform_driver);
1536 }
1537
1538 module_init(eeepc_laptop_init);
1539 module_exit(eeepc_laptop_exit);
Linux with added FPC-III support