Drivers: platform: x86: remove __dev* attributes.
[linux-3.10.git] / drivers / platform / x86 / ideapad-laptop.c
1 /*
2  *  ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
3  *
4  *  Copyright © 2010 Intel Corporation
5  *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License as published by
9  *  the Free Software Foundation; either version 2 of the License, or
10  *  (at your option) any later version.
11  *
12  *  This program is distributed in the hope that it will be useful,
13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *  GNU General Public License for more details.
16  *
17  *  You should have received a copy of the GNU General Public License
18  *  along with this program; if not, write to the Free Software
19  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20  *  02110-1301, USA.
21  */
22
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/types.h>
29 #include <acpi/acpi_bus.h>
30 #include <acpi/acpi_drivers.h>
31 #include <linux/rfkill.h>
32 #include <linux/platform_device.h>
33 #include <linux/input.h>
34 #include <linux/input/sparse-keymap.h>
35 #include <linux/backlight.h>
36 #include <linux/fb.h>
37 #include <linux/debugfs.h>
38 #include <linux/seq_file.h>
39 #include <linux/i8042.h>
40
41 #define IDEAPAD_RFKILL_DEV_NUM  (3)
42
43 #define CFG_BT_BIT      (16)
44 #define CFG_3G_BIT      (17)
45 #define CFG_WIFI_BIT    (18)
46 #define CFG_CAMERA_BIT  (19)
47
48 enum {
49         VPCCMD_R_VPC1 = 0x10,
50         VPCCMD_R_BL_MAX,
51         VPCCMD_R_BL,
52         VPCCMD_W_BL,
53         VPCCMD_R_WIFI,
54         VPCCMD_W_WIFI,
55         VPCCMD_R_BT,
56         VPCCMD_W_BT,
57         VPCCMD_R_BL_POWER,
58         VPCCMD_R_NOVO,
59         VPCCMD_R_VPC2,
60         VPCCMD_R_TOUCHPAD,
61         VPCCMD_W_TOUCHPAD,
62         VPCCMD_R_CAMERA,
63         VPCCMD_W_CAMERA,
64         VPCCMD_R_3G,
65         VPCCMD_W_3G,
66         VPCCMD_R_ODD, /* 0x21 */
67         VPCCMD_W_FAN,
68         VPCCMD_R_RF,
69         VPCCMD_W_RF,
70         VPCCMD_R_FAN = 0x2B,
71         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
72         VPCCMD_W_BL_POWER = 0x33,
73 };
74
75 struct ideapad_private {
76         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
77         struct platform_device *platform_device;
78         struct input_dev *inputdev;
79         struct backlight_device *blightdev;
80         struct dentry *debug;
81         unsigned long cfg;
82 };
83
84 static acpi_handle ideapad_handle;
85 static struct ideapad_private *ideapad_priv;
86 static bool no_bt_rfkill;
87 module_param(no_bt_rfkill, bool, 0444);
88 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
89
90 /*
91  * ACPI Helpers
92  */
93 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
94
95 static int read_method_int(acpi_handle handle, const char *method, int *val)
96 {
97         acpi_status status;
98         unsigned long long result;
99
100         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
101         if (ACPI_FAILURE(status)) {
102                 *val = -1;
103                 return -1;
104         } else {
105                 *val = result;
106                 return 0;
107         }
108 }
109
110 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
111 {
112         acpi_status status;
113         unsigned long long result;
114         struct acpi_object_list params;
115         union acpi_object in_obj;
116
117         params.count = 1;
118         params.pointer = &in_obj;
119         in_obj.type = ACPI_TYPE_INTEGER;
120         in_obj.integer.value = cmd;
121
122         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
123
124         if (ACPI_FAILURE(status)) {
125                 *ret = -1;
126                 return -1;
127         } else {
128                 *ret = result;
129                 return 0;
130         }
131 }
132
133 static int method_vpcw(acpi_handle handle, int cmd, int data)
134 {
135         struct acpi_object_list params;
136         union acpi_object in_obj[2];
137         acpi_status status;
138
139         params.count = 2;
140         params.pointer = in_obj;
141         in_obj[0].type = ACPI_TYPE_INTEGER;
142         in_obj[0].integer.value = cmd;
143         in_obj[1].type = ACPI_TYPE_INTEGER;
144         in_obj[1].integer.value = data;
145
146         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
147         if (status != AE_OK)
148                 return -1;
149         return 0;
150 }
151
152 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
153 {
154         int val;
155         unsigned long int end_jiffies;
156
157         if (method_vpcw(handle, 1, cmd))
158                 return -1;
159
160         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
161              time_before(jiffies, end_jiffies);) {
162                 schedule();
163                 if (method_vpcr(handle, 1, &val))
164                         return -1;
165                 if (val == 0) {
166                         if (method_vpcr(handle, 0, &val))
167                                 return -1;
168                         *data = val;
169                         return 0;
170                 }
171         }
172         pr_err("timeout in read_ec_cmd\n");
173         return -1;
174 }
175
176 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
177 {
178         int val;
179         unsigned long int end_jiffies;
180
181         if (method_vpcw(handle, 0, data))
182                 return -1;
183         if (method_vpcw(handle, 1, cmd))
184                 return -1;
185
186         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
187              time_before(jiffies, end_jiffies);) {
188                 schedule();
189                 if (method_vpcr(handle, 1, &val))
190                         return -1;
191                 if (val == 0)
192                         return 0;
193         }
194         pr_err("timeout in write_ec_cmd\n");
195         return -1;
196 }
197
198 /*
199  * debugfs
200  */
201 static int debugfs_status_show(struct seq_file *s, void *data)
202 {
203         unsigned long value;
204
205         if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &value))
206                 seq_printf(s, "Backlight max:\t%lu\n", value);
207         if (!read_ec_data(ideapad_handle, VPCCMD_R_BL, &value))
208                 seq_printf(s, "Backlight now:\t%lu\n", value);
209         if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &value))
210                 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
211         seq_printf(s, "=====================\n");
212
213         if (!read_ec_data(ideapad_handle, VPCCMD_R_RF, &value))
214                 seq_printf(s, "Radio status:\t%s(%lu)\n",
215                            value ? "On" : "Off", value);
216         if (!read_ec_data(ideapad_handle, VPCCMD_R_WIFI, &value))
217                 seq_printf(s, "Wifi status:\t%s(%lu)\n",
218                            value ? "On" : "Off", value);
219         if (!read_ec_data(ideapad_handle, VPCCMD_R_BT, &value))
220                 seq_printf(s, "BT status:\t%s(%lu)\n",
221                            value ? "On" : "Off", value);
222         if (!read_ec_data(ideapad_handle, VPCCMD_R_3G, &value))
223                 seq_printf(s, "3G status:\t%s(%lu)\n",
224                            value ? "On" : "Off", value);
225         seq_printf(s, "=====================\n");
226
227         if (!read_ec_data(ideapad_handle, VPCCMD_R_TOUCHPAD, &value))
228                 seq_printf(s, "Touchpad status:%s(%lu)\n",
229                            value ? "On" : "Off", value);
230         if (!read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &value))
231                 seq_printf(s, "Camera status:\t%s(%lu)\n",
232                            value ? "On" : "Off", value);
233
234         return 0;
235 }
236
237 static int debugfs_status_open(struct inode *inode, struct file *file)
238 {
239         return single_open(file, debugfs_status_show, NULL);
240 }
241
242 static const struct file_operations debugfs_status_fops = {
243         .owner = THIS_MODULE,
244         .open = debugfs_status_open,
245         .read = seq_read,
246         .llseek = seq_lseek,
247         .release = single_release,
248 };
249
250 static int debugfs_cfg_show(struct seq_file *s, void *data)
251 {
252         if (!ideapad_priv) {
253                 seq_printf(s, "cfg: N/A\n");
254         } else {
255                 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
256                            ideapad_priv->cfg);
257                 if (test_bit(CFG_BT_BIT, &ideapad_priv->cfg))
258                         seq_printf(s, "Bluetooth ");
259                 if (test_bit(CFG_3G_BIT, &ideapad_priv->cfg))
260                         seq_printf(s, "3G ");
261                 if (test_bit(CFG_WIFI_BIT, &ideapad_priv->cfg))
262                         seq_printf(s, "Wireless ");
263                 if (test_bit(CFG_CAMERA_BIT, &ideapad_priv->cfg))
264                         seq_printf(s, "Camera ");
265                 seq_printf(s, "\nGraphic: ");
266                 switch ((ideapad_priv->cfg)&0x700) {
267                 case 0x100:
268                         seq_printf(s, "Intel");
269                         break;
270                 case 0x200:
271                         seq_printf(s, "ATI");
272                         break;
273                 case 0x300:
274                         seq_printf(s, "Nvidia");
275                         break;
276                 case 0x400:
277                         seq_printf(s, "Intel and ATI");
278                         break;
279                 case 0x500:
280                         seq_printf(s, "Intel and Nvidia");
281                         break;
282                 }
283                 seq_printf(s, "\n");
284         }
285         return 0;
286 }
287
288 static int debugfs_cfg_open(struct inode *inode, struct file *file)
289 {
290         return single_open(file, debugfs_cfg_show, NULL);
291 }
292
293 static const struct file_operations debugfs_cfg_fops = {
294         .owner = THIS_MODULE,
295         .open = debugfs_cfg_open,
296         .read = seq_read,
297         .llseek = seq_lseek,
298         .release = single_release,
299 };
300
301 static int ideapad_debugfs_init(struct ideapad_private *priv)
302 {
303         struct dentry *node;
304
305         priv->debug = debugfs_create_dir("ideapad", NULL);
306         if (priv->debug == NULL) {
307                 pr_err("failed to create debugfs directory");
308                 goto errout;
309         }
310
311         node = debugfs_create_file("cfg", S_IRUGO, priv->debug, NULL,
312                                    &debugfs_cfg_fops);
313         if (!node) {
314                 pr_err("failed to create cfg in debugfs");
315                 goto errout;
316         }
317
318         node = debugfs_create_file("status", S_IRUGO, priv->debug, NULL,
319                                    &debugfs_status_fops);
320         if (!node) {
321                 pr_err("failed to create status in debugfs");
322                 goto errout;
323         }
324
325         return 0;
326
327 errout:
328         return -ENOMEM;
329 }
330
331 static void ideapad_debugfs_exit(struct ideapad_private *priv)
332 {
333         debugfs_remove_recursive(priv->debug);
334         priv->debug = NULL;
335 }
336
337 /*
338  * sysfs
339  */
340 static ssize_t show_ideapad_cam(struct device *dev,
341                                 struct device_attribute *attr,
342                                 char *buf)
343 {
344         unsigned long result;
345
346         if (read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &result))
347                 return sprintf(buf, "-1\n");
348         return sprintf(buf, "%lu\n", result);
349 }
350
351 static ssize_t store_ideapad_cam(struct device *dev,
352                                  struct device_attribute *attr,
353                                  const char *buf, size_t count)
354 {
355         int ret, state;
356
357         if (!count)
358                 return 0;
359         if (sscanf(buf, "%i", &state) != 1)
360                 return -EINVAL;
361         ret = write_ec_cmd(ideapad_handle, VPCCMD_W_CAMERA, state);
362         if (ret < 0)
363                 return -EIO;
364         return count;
365 }
366
367 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
368
369 static ssize_t show_ideapad_fan(struct device *dev,
370                                 struct device_attribute *attr,
371                                 char *buf)
372 {
373         unsigned long result;
374
375         if (read_ec_data(ideapad_handle, VPCCMD_R_FAN, &result))
376                 return sprintf(buf, "-1\n");
377         return sprintf(buf, "%lu\n", result);
378 }
379
380 static ssize_t store_ideapad_fan(struct device *dev,
381                                  struct device_attribute *attr,
382                                  const char *buf, size_t count)
383 {
384         int ret, state;
385
386         if (!count)
387                 return 0;
388         if (sscanf(buf, "%i", &state) != 1)
389                 return -EINVAL;
390         if (state < 0 || state > 4 || state == 3)
391                 return -EINVAL;
392         ret = write_ec_cmd(ideapad_handle, VPCCMD_W_FAN, state);
393         if (ret < 0)
394                 return -EIO;
395         return count;
396 }
397
398 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
399
400 static struct attribute *ideapad_attributes[] = {
401         &dev_attr_camera_power.attr,
402         &dev_attr_fan_mode.attr,
403         NULL
404 };
405
406 static umode_t ideapad_is_visible(struct kobject *kobj,
407                                  struct attribute *attr,
408                                  int idx)
409 {
410         struct device *dev = container_of(kobj, struct device, kobj);
411         struct ideapad_private *priv = dev_get_drvdata(dev);
412         bool supported;
413
414         if (attr == &dev_attr_camera_power.attr)
415                 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
416         else if (attr == &dev_attr_fan_mode.attr) {
417                 unsigned long value;
418                 supported = !read_ec_data(ideapad_handle, VPCCMD_R_FAN, &value);
419         } else
420                 supported = true;
421
422         return supported ? attr->mode : 0;
423 }
424
425 static struct attribute_group ideapad_attribute_group = {
426         .is_visible = ideapad_is_visible,
427         .attrs = ideapad_attributes
428 };
429
430 /*
431  * Rfkill
432  */
433 struct ideapad_rfk_data {
434         char *name;
435         int cfgbit;
436         int opcode;
437         int type;
438 };
439
440 const struct ideapad_rfk_data ideapad_rfk_data[] = {
441         { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
442         { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
443         { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
444 };
445
446 static int ideapad_rfk_set(void *data, bool blocked)
447 {
448         unsigned long opcode = (unsigned long)data;
449
450         return write_ec_cmd(ideapad_handle, opcode, !blocked);
451 }
452
453 static struct rfkill_ops ideapad_rfk_ops = {
454         .set_block = ideapad_rfk_set,
455 };
456
457 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
458 {
459         unsigned long hw_blocked;
460         int i;
461
462         if (read_ec_data(ideapad_handle, VPCCMD_R_RF, &hw_blocked))
463                 return;
464         hw_blocked = !hw_blocked;
465
466         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
467                 if (priv->rfk[i])
468                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
469 }
470
471 static int ideapad_register_rfkill(struct acpi_device *adevice, int dev)
472 {
473         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
474         int ret;
475         unsigned long sw_blocked;
476
477         if (no_bt_rfkill &&
478             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
479                 /* Force to enable bluetooth when no_bt_rfkill=1 */
480                 write_ec_cmd(ideapad_handle,
481                              ideapad_rfk_data[dev].opcode, 1);
482                 return 0;
483         }
484
485         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
486                                       ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
487                                       (void *)(long)dev);
488         if (!priv->rfk[dev])
489                 return -ENOMEM;
490
491         if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
492                          &sw_blocked)) {
493                 rfkill_init_sw_state(priv->rfk[dev], 0);
494         } else {
495                 sw_blocked = !sw_blocked;
496                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
497         }
498
499         ret = rfkill_register(priv->rfk[dev]);
500         if (ret) {
501                 rfkill_destroy(priv->rfk[dev]);
502                 return ret;
503         }
504         return 0;
505 }
506
507 static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
508 {
509         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
510
511         if (!priv->rfk[dev])
512                 return;
513
514         rfkill_unregister(priv->rfk[dev]);
515         rfkill_destroy(priv->rfk[dev]);
516 }
517
518 /*
519  * Platform device
520  */
521 static int ideapad_platform_init(struct ideapad_private *priv)
522 {
523         int result;
524
525         priv->platform_device = platform_device_alloc("ideapad", -1);
526         if (!priv->platform_device)
527                 return -ENOMEM;
528         platform_set_drvdata(priv->platform_device, priv);
529
530         result = platform_device_add(priv->platform_device);
531         if (result)
532                 goto fail_platform_device;
533
534         result = sysfs_create_group(&priv->platform_device->dev.kobj,
535                                     &ideapad_attribute_group);
536         if (result)
537                 goto fail_sysfs;
538         return 0;
539
540 fail_sysfs:
541         platform_device_del(priv->platform_device);
542 fail_platform_device:
543         platform_device_put(priv->platform_device);
544         return result;
545 }
546
547 static void ideapad_platform_exit(struct ideapad_private *priv)
548 {
549         sysfs_remove_group(&priv->platform_device->dev.kobj,
550                            &ideapad_attribute_group);
551         platform_device_unregister(priv->platform_device);
552 }
553
554 /*
555  * input device
556  */
557 static const struct key_entry ideapad_keymap[] = {
558         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
559         { KE_KEY, 7,  { KEY_CAMERA } },
560         { KE_KEY, 11, { KEY_F16 } },
561         { KE_KEY, 13, { KEY_WLAN } },
562         { KE_KEY, 16, { KEY_PROG1 } },
563         { KE_KEY, 17, { KEY_PROG2 } },
564         { KE_KEY, 64, { KEY_PROG3 } },
565         { KE_KEY, 65, { KEY_PROG4 } },
566         { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
567         { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
568         { KE_END, 0 },
569 };
570
571 static int ideapad_input_init(struct ideapad_private *priv)
572 {
573         struct input_dev *inputdev;
574         int error;
575
576         inputdev = input_allocate_device();
577         if (!inputdev) {
578                 pr_info("Unable to allocate input device\n");
579                 return -ENOMEM;
580         }
581
582         inputdev->name = "Ideapad extra buttons";
583         inputdev->phys = "ideapad/input0";
584         inputdev->id.bustype = BUS_HOST;
585         inputdev->dev.parent = &priv->platform_device->dev;
586
587         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
588         if (error) {
589                 pr_err("Unable to setup input device keymap\n");
590                 goto err_free_dev;
591         }
592
593         error = input_register_device(inputdev);
594         if (error) {
595                 pr_err("Unable to register input device\n");
596                 goto err_free_keymap;
597         }
598
599         priv->inputdev = inputdev;
600         return 0;
601
602 err_free_keymap:
603         sparse_keymap_free(inputdev);
604 err_free_dev:
605         input_free_device(inputdev);
606         return error;
607 }
608
609 static void ideapad_input_exit(struct ideapad_private *priv)
610 {
611         sparse_keymap_free(priv->inputdev);
612         input_unregister_device(priv->inputdev);
613         priv->inputdev = NULL;
614 }
615
616 static void ideapad_input_report(struct ideapad_private *priv,
617                                  unsigned long scancode)
618 {
619         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
620 }
621
622 static void ideapad_input_novokey(struct ideapad_private *priv)
623 {
624         unsigned long long_pressed;
625
626         if (read_ec_data(ideapad_handle, VPCCMD_R_NOVO, &long_pressed))
627                 return;
628         if (long_pressed)
629                 ideapad_input_report(priv, 17);
630         else
631                 ideapad_input_report(priv, 16);
632 }
633
634 static void ideapad_check_special_buttons(struct ideapad_private *priv)
635 {
636         unsigned long bit, value;
637
638         read_ec_data(ideapad_handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
639
640         for (bit = 0; bit < 16; bit++) {
641                 if (test_bit(bit, &value)) {
642                         switch (bit) {
643                         case 6:
644                                 /* Thermal Management button */
645                                 ideapad_input_report(priv, 65);
646                                 break;
647                         case 1:
648                                 /* OneKey Theater button */
649                                 ideapad_input_report(priv, 64);
650                                 break;
651                         }
652                 }
653         }
654 }
655
656 /*
657  * backlight
658  */
659 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
660 {
661         unsigned long now;
662
663         if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
664                 return -EIO;
665         return now;
666 }
667
668 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
669 {
670         if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL,
671                          blightdev->props.brightness))
672                 return -EIO;
673         if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL_POWER,
674                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
675                 return -EIO;
676
677         return 0;
678 }
679
680 static const struct backlight_ops ideapad_backlight_ops = {
681         .get_brightness = ideapad_backlight_get_brightness,
682         .update_status = ideapad_backlight_update_status,
683 };
684
685 static int ideapad_backlight_init(struct ideapad_private *priv)
686 {
687         struct backlight_device *blightdev;
688         struct backlight_properties props;
689         unsigned long max, now, power;
690
691         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &max))
692                 return -EIO;
693         if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
694                 return -EIO;
695         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
696                 return -EIO;
697
698         memset(&props, 0, sizeof(struct backlight_properties));
699         props.max_brightness = max;
700         props.type = BACKLIGHT_PLATFORM;
701         blightdev = backlight_device_register("ideapad",
702                                               &priv->platform_device->dev,
703                                               priv,
704                                               &ideapad_backlight_ops,
705                                               &props);
706         if (IS_ERR(blightdev)) {
707                 pr_err("Could not register backlight device\n");
708                 return PTR_ERR(blightdev);
709         }
710
711         priv->blightdev = blightdev;
712         blightdev->props.brightness = now;
713         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
714         backlight_update_status(blightdev);
715
716         return 0;
717 }
718
719 static void ideapad_backlight_exit(struct ideapad_private *priv)
720 {
721         if (priv->blightdev)
722                 backlight_device_unregister(priv->blightdev);
723         priv->blightdev = NULL;
724 }
725
726 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
727 {
728         unsigned long power;
729         struct backlight_device *blightdev = priv->blightdev;
730
731         if (!blightdev)
732                 return;
733         if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
734                 return;
735         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
736 }
737
738 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
739 {
740         unsigned long now;
741
742         /* if we control brightness via acpi video driver */
743         if (priv->blightdev == NULL) {
744                 read_ec_data(ideapad_handle, VPCCMD_R_BL, &now);
745                 return;
746         }
747
748         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
749 }
750
751 /*
752  * module init/exit
753  */
754 static const struct acpi_device_id ideapad_device_ids[] = {
755         { "VPC2004", 0},
756         { "", 0},
757 };
758 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
759
760 static void ideapad_sync_touchpad_state(struct acpi_device *adevice)
761 {
762         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
763         unsigned long value;
764
765         /* Without reading from EC touchpad LED doesn't switch state */
766         if (!read_ec_data(adevice->handle, VPCCMD_R_TOUCHPAD, &value)) {
767                 /* Some IdeaPads don't really turn off touchpad - they only
768                  * switch the LED state. We (de)activate KBC AUX port to turn
769                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
770                  * KEY_TOUCHPAD_ON to not to get out of sync with LED */
771                 unsigned char param;
772                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
773                               I8042_CMD_AUX_DISABLE);
774                 ideapad_input_report(priv, value ? 67 : 66);
775         }
776 }
777
778 static int ideapad_acpi_add(struct acpi_device *adevice)
779 {
780         int ret, i;
781         int cfg;
782         struct ideapad_private *priv;
783
784         if (read_method_int(adevice->handle, "_CFG", &cfg))
785                 return -ENODEV;
786
787         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
788         if (!priv)
789                 return -ENOMEM;
790         dev_set_drvdata(&adevice->dev, priv);
791         ideapad_priv = priv;
792         ideapad_handle = adevice->handle;
793         priv->cfg = cfg;
794
795         ret = ideapad_platform_init(priv);
796         if (ret)
797                 goto platform_failed;
798
799         ret = ideapad_debugfs_init(priv);
800         if (ret)
801                 goto debugfs_failed;
802
803         ret = ideapad_input_init(priv);
804         if (ret)
805                 goto input_failed;
806
807         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
808                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
809                         ideapad_register_rfkill(adevice, i);
810                 else
811                         priv->rfk[i] = NULL;
812         }
813         ideapad_sync_rfk_state(priv);
814         ideapad_sync_touchpad_state(adevice);
815
816         if (!acpi_video_backlight_support()) {
817                 ret = ideapad_backlight_init(priv);
818                 if (ret && ret != -ENODEV)
819                         goto backlight_failed;
820         }
821
822         return 0;
823
824 backlight_failed:
825         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
826                 ideapad_unregister_rfkill(adevice, i);
827         ideapad_input_exit(priv);
828 input_failed:
829         ideapad_debugfs_exit(priv);
830 debugfs_failed:
831         ideapad_platform_exit(priv);
832 platform_failed:
833         kfree(priv);
834         return ret;
835 }
836
837 static int ideapad_acpi_remove(struct acpi_device *adevice, int type)
838 {
839         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
840         int i;
841
842         ideapad_backlight_exit(priv);
843         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
844                 ideapad_unregister_rfkill(adevice, i);
845         ideapad_input_exit(priv);
846         ideapad_debugfs_exit(priv);
847         ideapad_platform_exit(priv);
848         dev_set_drvdata(&adevice->dev, NULL);
849         kfree(priv);
850
851         return 0;
852 }
853
854 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
855 {
856         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
857         acpi_handle handle = adevice->handle;
858         unsigned long vpc1, vpc2, vpc_bit;
859
860         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
861                 return;
862         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
863                 return;
864
865         vpc1 = (vpc2 << 8) | vpc1;
866         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
867                 if (test_bit(vpc_bit, &vpc1)) {
868                         switch (vpc_bit) {
869                         case 9:
870                                 ideapad_sync_rfk_state(priv);
871                                 break;
872                         case 13:
873                         case 11:
874                         case 7:
875                         case 6:
876                                 ideapad_input_report(priv, vpc_bit);
877                                 break;
878                         case 5:
879                                 ideapad_sync_touchpad_state(adevice);
880                                 break;
881                         case 4:
882                                 ideapad_backlight_notify_brightness(priv);
883                                 break;
884                         case 3:
885                                 ideapad_input_novokey(priv);
886                                 break;
887                         case 2:
888                                 ideapad_backlight_notify_power(priv);
889                                 break;
890                         case 0:
891                                 ideapad_check_special_buttons(priv);
892                                 break;
893                         default:
894                                 pr_info("Unknown event: %lu\n", vpc_bit);
895                         }
896                 }
897         }
898 }
899
900 static int ideapad_acpi_resume(struct device *device)
901 {
902         ideapad_sync_rfk_state(ideapad_priv);
903         ideapad_sync_touchpad_state(to_acpi_device(device));
904         return 0;
905 }
906
907 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
908
909 static struct acpi_driver ideapad_acpi_driver = {
910         .name = "ideapad_acpi",
911         .class = "IdeaPad",
912         .ids = ideapad_device_ids,
913         .ops.add = ideapad_acpi_add,
914         .ops.remove = ideapad_acpi_remove,
915         .ops.notify = ideapad_acpi_notify,
916         .drv.pm = &ideapad_pm,
917         .owner = THIS_MODULE,
918 };
919 module_acpi_driver(ideapad_acpi_driver);
920
921 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
922 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
923 MODULE_LICENSE("GPL");