bfdda33feb26547dea8a5187543bb4b58de38f01
[linux-2.6.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
36 #define IDEAPAD_RFKILL_DEV_NUM  (3)
37
38 struct ideapad_private {
39         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
40         struct platform_device *platform_device;
41         struct input_dev *inputdev;
42 };
43
44 static acpi_handle ideapad_handle;
45 static bool no_bt_rfkill;
46 module_param(no_bt_rfkill, bool, 0444);
47 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
48
49 /*
50  * ACPI Helpers
51  */
52 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
53
54 static int read_method_int(acpi_handle handle, const char *method, int *val)
55 {
56         acpi_status status;
57         unsigned long long result;
58
59         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
60         if (ACPI_FAILURE(status)) {
61                 *val = -1;
62                 return -1;
63         } else {
64                 *val = result;
65                 return 0;
66         }
67 }
68
69 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
70 {
71         acpi_status status;
72         unsigned long long result;
73         struct acpi_object_list params;
74         union acpi_object in_obj;
75
76         params.count = 1;
77         params.pointer = &in_obj;
78         in_obj.type = ACPI_TYPE_INTEGER;
79         in_obj.integer.value = cmd;
80
81         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
82
83         if (ACPI_FAILURE(status)) {
84                 *ret = -1;
85                 return -1;
86         } else {
87                 *ret = result;
88                 return 0;
89         }
90 }
91
92 static int method_vpcw(acpi_handle handle, int cmd, int data)
93 {
94         struct acpi_object_list params;
95         union acpi_object in_obj[2];
96         acpi_status status;
97
98         params.count = 2;
99         params.pointer = in_obj;
100         in_obj[0].type = ACPI_TYPE_INTEGER;
101         in_obj[0].integer.value = cmd;
102         in_obj[1].type = ACPI_TYPE_INTEGER;
103         in_obj[1].integer.value = data;
104
105         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
106         if (status != AE_OK)
107                 return -1;
108         return 0;
109 }
110
111 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
112 {
113         int val;
114         unsigned long int end_jiffies;
115
116         if (method_vpcw(handle, 1, cmd))
117                 return -1;
118
119         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
120              time_before(jiffies, end_jiffies);) {
121                 schedule();
122                 if (method_vpcr(handle, 1, &val))
123                         return -1;
124                 if (val == 0) {
125                         if (method_vpcr(handle, 0, &val))
126                                 return -1;
127                         *data = val;
128                         return 0;
129                 }
130         }
131         pr_err("timeout in read_ec_cmd\n");
132         return -1;
133 }
134
135 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
136 {
137         int val;
138         unsigned long int end_jiffies;
139
140         if (method_vpcw(handle, 0, data))
141                 return -1;
142         if (method_vpcw(handle, 1, cmd))
143                 return -1;
144
145         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
146              time_before(jiffies, end_jiffies);) {
147                 schedule();
148                 if (method_vpcr(handle, 1, &val))
149                         return -1;
150                 if (val == 0)
151                         return 0;
152         }
153         pr_err("timeout in write_ec_cmd\n");
154         return -1;
155 }
156
157 /*
158  * camera power
159  */
160 static ssize_t show_ideapad_cam(struct device *dev,
161                                 struct device_attribute *attr,
162                                 char *buf)
163 {
164         unsigned long result;
165
166         if (read_ec_data(ideapad_handle, 0x1D, &result))
167                 return sprintf(buf, "-1\n");
168         return sprintf(buf, "%lu\n", result);
169 }
170
171 static ssize_t store_ideapad_cam(struct device *dev,
172                                  struct device_attribute *attr,
173                                  const char *buf, size_t count)
174 {
175         int ret, state;
176
177         if (!count)
178                 return 0;
179         if (sscanf(buf, "%i", &state) != 1)
180                 return -EINVAL;
181         ret = write_ec_cmd(ideapad_handle, 0x1E, state);
182         if (ret < 0)
183                 return ret;
184         return count;
185 }
186
187 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
188
189 /*
190  * Rfkill
191  */
192 struct ideapad_rfk_data {
193         char *name;
194         int cfgbit;
195         int opcode;
196         int type;
197 };
198
199 const struct ideapad_rfk_data ideapad_rfk_data[] = {
200         { "ideapad_wlan",       18, 0x15, RFKILL_TYPE_WLAN },
201         { "ideapad_bluetooth",  16, 0x17, RFKILL_TYPE_BLUETOOTH },
202         { "ideapad_3g",         17, 0x20, RFKILL_TYPE_WWAN },
203 };
204
205 static int ideapad_rfk_set(void *data, bool blocked)
206 {
207         unsigned long opcode = (unsigned long)data;
208
209         return write_ec_cmd(ideapad_handle, opcode, !blocked);
210 }
211
212 static struct rfkill_ops ideapad_rfk_ops = {
213         .set_block = ideapad_rfk_set,
214 };
215
216 static void ideapad_sync_rfk_state(struct acpi_device *adevice)
217 {
218         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
219         unsigned long hw_blocked;
220         int i;
221
222         if (read_ec_data(ideapad_handle, 0x23, &hw_blocked))
223                 return;
224         hw_blocked = !hw_blocked;
225
226         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
227                 if (priv->rfk[i])
228                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
229 }
230
231 static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
232                                              int dev)
233 {
234         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
235         int ret;
236         unsigned long sw_blocked;
237
238         if (no_bt_rfkill &&
239             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
240                 /* Force to enable bluetooth when no_bt_rfkill=1 */
241                 write_ec_cmd(ideapad_handle,
242                              ideapad_rfk_data[dev].opcode, 1);
243                 return 0;
244         }
245
246         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
247                                       ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
248                                       (void *)(long)dev);
249         if (!priv->rfk[dev])
250                 return -ENOMEM;
251
252         if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
253                          &sw_blocked)) {
254                 rfkill_init_sw_state(priv->rfk[dev], 0);
255         } else {
256                 sw_blocked = !sw_blocked;
257                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
258         }
259
260         ret = rfkill_register(priv->rfk[dev]);
261         if (ret) {
262                 rfkill_destroy(priv->rfk[dev]);
263                 return ret;
264         }
265         return 0;
266 }
267
268 static void __devexit ideapad_unregister_rfkill(struct acpi_device *adevice,
269                                                 int dev)
270 {
271         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
272
273         if (!priv->rfk[dev])
274                 return;
275
276         rfkill_unregister(priv->rfk[dev]);
277         rfkill_destroy(priv->rfk[dev]);
278 }
279
280 /*
281  * Platform device
282  */
283 static struct attribute *ideapad_attributes[] = {
284         &dev_attr_camera_power.attr,
285         NULL
286 };
287
288 static struct attribute_group ideapad_attribute_group = {
289         .attrs = ideapad_attributes
290 };
291
292 static int __devinit ideapad_platform_init(struct ideapad_private *priv)
293 {
294         int result;
295
296         priv->platform_device = platform_device_alloc("ideapad", -1);
297         if (!priv->platform_device)
298                 return -ENOMEM;
299         platform_set_drvdata(priv->platform_device, priv);
300
301         result = platform_device_add(priv->platform_device);
302         if (result)
303                 goto fail_platform_device;
304
305         result = sysfs_create_group(&priv->platform_device->dev.kobj,
306                                     &ideapad_attribute_group);
307         if (result)
308                 goto fail_sysfs;
309         return 0;
310
311 fail_sysfs:
312         platform_device_del(priv->platform_device);
313 fail_platform_device:
314         platform_device_put(priv->platform_device);
315         return result;
316 }
317
318 static void ideapad_platform_exit(struct ideapad_private *priv)
319 {
320         sysfs_remove_group(&priv->platform_device->dev.kobj,
321                            &ideapad_attribute_group);
322         platform_device_unregister(priv->platform_device);
323 }
324
325 /*
326  * input device
327  */
328 static const struct key_entry ideapad_keymap[] = {
329         { KE_KEY, 0x06, { KEY_SWITCHVIDEOMODE } },
330         { KE_KEY, 0x0D, { KEY_WLAN } },
331         { KE_END, 0 },
332 };
333
334 static int __devinit ideapad_input_init(struct ideapad_private *priv)
335 {
336         struct input_dev *inputdev;
337         int error;
338
339         inputdev = input_allocate_device();
340         if (!inputdev) {
341                 pr_info("Unable to allocate input device\n");
342                 return -ENOMEM;
343         }
344
345         inputdev->name = "Ideapad extra buttons";
346         inputdev->phys = "ideapad/input0";
347         inputdev->id.bustype = BUS_HOST;
348         inputdev->dev.parent = &priv->platform_device->dev;
349
350         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
351         if (error) {
352                 pr_err("Unable to setup input device keymap\n");
353                 goto err_free_dev;
354         }
355
356         error = input_register_device(inputdev);
357         if (error) {
358                 pr_err("Unable to register input device\n");
359                 goto err_free_keymap;
360         }
361
362         priv->inputdev = inputdev;
363         return 0;
364
365 err_free_keymap:
366         sparse_keymap_free(inputdev);
367 err_free_dev:
368         input_free_device(inputdev);
369         return error;
370 }
371
372 static void __devexit ideapad_input_exit(struct ideapad_private *priv)
373 {
374         sparse_keymap_free(priv->inputdev);
375         input_unregister_device(priv->inputdev);
376         priv->inputdev = NULL;
377 }
378
379 static void ideapad_input_report(struct ideapad_private *priv,
380                                  unsigned long scancode)
381 {
382         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
383 }
384
385 /*
386  * module init/exit
387  */
388 static const struct acpi_device_id ideapad_device_ids[] = {
389         { "VPC2004", 0},
390         { "", 0},
391 };
392 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
393
394 static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
395 {
396         int ret, i, cfg;
397         struct ideapad_private *priv;
398
399         if (read_method_int(adevice->handle, "_CFG", &cfg))
400                 return -ENODEV;
401
402         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
403         if (!priv)
404                 return -ENOMEM;
405         dev_set_drvdata(&adevice->dev, priv);
406         ideapad_handle = adevice->handle;
407
408         ret = ideapad_platform_init(priv);
409         if (ret)
410                 goto platform_failed;
411
412         ret = ideapad_input_init(priv);
413         if (ret)
414                 goto input_failed;
415
416         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
417                 if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
418                         ideapad_register_rfkill(adevice, i);
419                 else
420                         priv->rfk[i] = NULL;
421         }
422         ideapad_sync_rfk_state(adevice);
423
424         return 0;
425
426 input_failed:
427         ideapad_platform_exit(priv);
428 platform_failed:
429         kfree(priv);
430         return ret;
431 }
432
433 static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
434 {
435         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
436         int i;
437
438         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
439                 ideapad_unregister_rfkill(adevice, i);
440         ideapad_input_exit(priv);
441         ideapad_platform_exit(priv);
442         dev_set_drvdata(&adevice->dev, NULL);
443         kfree(priv);
444
445         return 0;
446 }
447
448 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
449 {
450         struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
451         acpi_handle handle = adevice->handle;
452         unsigned long vpc1, vpc2, vpc_bit;
453
454         if (read_ec_data(handle, 0x10, &vpc1))
455                 return;
456         if (read_ec_data(handle, 0x1A, &vpc2))
457                 return;
458
459         vpc1 = (vpc2 << 8) | vpc1;
460         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
461                 if (test_bit(vpc_bit, &vpc1)) {
462                         if (vpc_bit == 9)
463                                 ideapad_sync_rfk_state(adevice);
464                         else if (vpc_bit == 4)
465                                 read_ec_data(handle, 0x12, &vpc2);
466                         else
467                                 ideapad_input_report(priv, vpc_bit);
468                 }
469         }
470 }
471
472 static struct acpi_driver ideapad_acpi_driver = {
473         .name = "ideapad_acpi",
474         .class = "IdeaPad",
475         .ids = ideapad_device_ids,
476         .ops.add = ideapad_acpi_add,
477         .ops.remove = ideapad_acpi_remove,
478         .ops.notify = ideapad_acpi_notify,
479         .owner = THIS_MODULE,
480 };
481
482 static int __init ideapad_acpi_module_init(void)
483 {
484         return acpi_bus_register_driver(&ideapad_acpi_driver);
485 }
486
487 static void __exit ideapad_acpi_module_exit(void)
488 {
489         acpi_bus_unregister_driver(&ideapad_acpi_driver);
490 }
491
492 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
493 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
494 MODULE_LICENSE("GPL");
495
496 module_init(ideapad_acpi_module_init);
497 module_exit(ideapad_acpi_module_exit);