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23#include <linux/kernel.h>
24#include <linux/module.h>
25#include <linux/init.h>
26#include <linux/types.h>
27#include <acpi/acpi_bus.h>
28#include <acpi/acpi_drivers.h>
29#include <linux/rfkill.h>
30#include <linux/platform_device.h>
31#include <linux/input.h>
32#include <linux/input/sparse-keymap.h>
33
34#define IDEAPAD_RFKILL_DEV_NUM (3)
35
36struct ideapad_private {
37 struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
38 struct platform_device *platform_device;
39 struct input_dev *inputdev;
40};
41
42static acpi_handle ideapad_handle;
43static bool no_bt_rfkill;
44module_param(no_bt_rfkill, bool, 0444);
45MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
46
47
48
49
50#define IDEAPAD_EC_TIMEOUT (100)
51
52static int read_method_int(acpi_handle handle, const char *method, int *val)
53{
54 acpi_status status;
55 unsigned long long result;
56
57 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
58 if (ACPI_FAILURE(status)) {
59 *val = -1;
60 return -1;
61 } else {
62 *val = result;
63 return 0;
64 }
65}
66
67static int method_vpcr(acpi_handle handle, int cmd, int *ret)
68{
69 acpi_status status;
70 unsigned long long result;
71 struct acpi_object_list params;
72 union acpi_object in_obj;
73
74 params.count = 1;
75 params.pointer = &in_obj;
76 in_obj.type = ACPI_TYPE_INTEGER;
77 in_obj.integer.value = cmd;
78
79 status = acpi_evaluate_integer(handle, "VPCR", ¶ms, &result);
80
81 if (ACPI_FAILURE(status)) {
82 *ret = -1;
83 return -1;
84 } else {
85 *ret = result;
86 return 0;
87 }
88}
89
90static int method_vpcw(acpi_handle handle, int cmd, int data)
91{
92 struct acpi_object_list params;
93 union acpi_object in_obj[2];
94 acpi_status status;
95
96 params.count = 2;
97 params.pointer = in_obj;
98 in_obj[0].type = ACPI_TYPE_INTEGER;
99 in_obj[0].integer.value = cmd;
100 in_obj[1].type = ACPI_TYPE_INTEGER;
101 in_obj[1].integer.value = data;
102
103 status = acpi_evaluate_object(handle, "VPCW", ¶ms, NULL);
104 if (status != AE_OK)
105 return -1;
106 return 0;
107}
108
109static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
110{
111 int val;
112 unsigned long int end_jiffies;
113
114 if (method_vpcw(handle, 1, cmd))
115 return -1;
116
117 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
118 time_before(jiffies, end_jiffies);) {
119 schedule();
120 if (method_vpcr(handle, 1, &val))
121 return -1;
122 if (val == 0) {
123 if (method_vpcr(handle, 0, &val))
124 return -1;
125 *data = val;
126 return 0;
127 }
128 }
129 pr_err("timeout in read_ec_cmd\n");
130 return -1;
131}
132
133static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
134{
135 int val;
136 unsigned long int end_jiffies;
137
138 if (method_vpcw(handle, 0, data))
139 return -1;
140 if (method_vpcw(handle, 1, cmd))
141 return -1;
142
143 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
144 time_before(jiffies, end_jiffies);) {
145 schedule();
146 if (method_vpcr(handle, 1, &val))
147 return -1;
148 if (val == 0)
149 return 0;
150 }
151 pr_err("timeout in write_ec_cmd\n");
152 return -1;
153}
154
155
156
157
158static ssize_t show_ideapad_cam(struct device *dev,
159 struct device_attribute *attr,
160 char *buf)
161{
162 unsigned long result;
163
164 if (read_ec_data(ideapad_handle, 0x1D, &result))
165 return sprintf(buf, "-1\n");
166 return sprintf(buf, "%lu\n", result);
167}
168
169static ssize_t store_ideapad_cam(struct device *dev,
170 struct device_attribute *attr,
171 const char *buf, size_t count)
172{
173 int ret, state;
174
175 if (!count)
176 return 0;
177 if (sscanf(buf, "%i", &state) != 1)
178 return -EINVAL;
179 ret = write_ec_cmd(ideapad_handle, 0x1E, state);
180 if (ret < 0)
181 return ret;
182 return count;
183}
184
185static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
186
187
188
189
190struct ideapad_rfk_data {
191 char *name;
192 int cfgbit;
193 int opcode;
194 int type;
195};
196
197const struct ideapad_rfk_data ideapad_rfk_data[] = {
198 { "ideapad_wlan", 18, 0x15, RFKILL_TYPE_WLAN },
199 { "ideapad_bluetooth", 16, 0x17, RFKILL_TYPE_BLUETOOTH },
200 { "ideapad_3g", 17, 0x20, RFKILL_TYPE_WWAN },
201};
202
203static int ideapad_rfk_set(void *data, bool blocked)
204{
205 unsigned long opcode = (unsigned long)data;
206
207 return write_ec_cmd(ideapad_handle, opcode, !blocked);
208}
209
210static struct rfkill_ops ideapad_rfk_ops = {
211 .set_block = ideapad_rfk_set,
212};
213
214static void ideapad_sync_rfk_state(struct acpi_device *adevice)
215{
216 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
217 unsigned long hw_blocked;
218 int i;
219
220 if (read_ec_data(ideapad_handle, 0x23, &hw_blocked))
221 return;
222 hw_blocked = !hw_blocked;
223
224 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
225 if (priv->rfk[i])
226 rfkill_set_hw_state(priv->rfk[i], hw_blocked);
227}
228
229static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
230 int dev)
231{
232 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
233 int ret;
234 unsigned long sw_blocked;
235
236 if (no_bt_rfkill &&
237 (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
238
239 write_ec_cmd(ideapad_handle,
240 ideapad_rfk_data[dev].opcode, 1);
241 return 0;
242 }
243
244 priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
245 ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
246 (void *)(long)dev);
247 if (!priv->rfk[dev])
248 return -ENOMEM;
249
250 if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
251 &sw_blocked)) {
252 rfkill_init_sw_state(priv->rfk[dev], 0);
253 } else {
254 sw_blocked = !sw_blocked;
255 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
256 }
257
258 ret = rfkill_register(priv->rfk[dev]);
259 if (ret) {
260 rfkill_destroy(priv->rfk[dev]);
261 return ret;
262 }
263 return 0;
264}
265
266static void __devexit ideapad_unregister_rfkill(struct acpi_device *adevice,
267 int dev)
268{
269 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
270
271 if (!priv->rfk[dev])
272 return;
273
274 rfkill_unregister(priv->rfk[dev]);
275 rfkill_destroy(priv->rfk[dev]);
276}
277
278
279
280
281static struct attribute *ideapad_attributes[] = {
282 &dev_attr_camera_power.attr,
283 NULL
284};
285
286static struct attribute_group ideapad_attribute_group = {
287 .attrs = ideapad_attributes
288};
289
290static int __devinit ideapad_platform_init(struct ideapad_private *priv)
291{
292 int result;
293
294 priv->platform_device = platform_device_alloc("ideapad", -1);
295 if (!priv->platform_device)
296 return -ENOMEM;
297 platform_set_drvdata(priv->platform_device, priv);
298
299 result = platform_device_add(priv->platform_device);
300 if (result)
301 goto fail_platform_device;
302
303 result = sysfs_create_group(&priv->platform_device->dev.kobj,
304 &ideapad_attribute_group);
305 if (result)
306 goto fail_sysfs;
307 return 0;
308
309fail_sysfs:
310 platform_device_del(priv->platform_device);
311fail_platform_device:
312 platform_device_put(priv->platform_device);
313 return result;
314}
315
316static void ideapad_platform_exit(struct ideapad_private *priv)
317{
318 sysfs_remove_group(&priv->platform_device->dev.kobj,
319 &ideapad_attribute_group);
320 platform_device_unregister(priv->platform_device);
321}
322
323
324
325
326static const struct key_entry ideapad_keymap[] = {
327 { KE_KEY, 0x06, { KEY_SWITCHVIDEOMODE } },
328 { KE_KEY, 0x0D, { KEY_WLAN } },
329 { KE_END, 0 },
330};
331
332static int __devinit ideapad_input_init(struct ideapad_private *priv)
333{
334 struct input_dev *inputdev;
335 int error;
336
337 inputdev = input_allocate_device();
338 if (!inputdev) {
339 pr_info("Unable to allocate input device\n");
340 return -ENOMEM;
341 }
342
343 inputdev->name = "Ideapad extra buttons";
344 inputdev->phys = "ideapad/input0";
345 inputdev->id.bustype = BUS_HOST;
346 inputdev->dev.parent = &priv->platform_device->dev;
347
348 error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
349 if (error) {
350 pr_err("Unable to setup input device keymap\n");
351 goto err_free_dev;
352 }
353
354 error = input_register_device(inputdev);
355 if (error) {
356 pr_err("Unable to register input device\n");
357 goto err_free_keymap;
358 }
359
360 priv->inputdev = inputdev;
361 return 0;
362
363err_free_keymap:
364 sparse_keymap_free(inputdev);
365err_free_dev:
366 input_free_device(inputdev);
367 return error;
368}
369
370static void __devexit ideapad_input_exit(struct ideapad_private *priv)
371{
372 sparse_keymap_free(priv->inputdev);
373 input_unregister_device(priv->inputdev);
374 priv->inputdev = NULL;
375}
376
377static void ideapad_input_report(struct ideapad_private *priv,
378 unsigned long scancode)
379{
380 sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
381}
382
383
384
385
386static const struct acpi_device_id ideapad_device_ids[] = {
387 { "VPC2004", 0},
388 { "", 0},
389};
390MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
391
392static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
393{
394 int ret, i, cfg;
395 struct ideapad_private *priv;
396
397 if (read_method_int(adevice->handle, "_CFG", &cfg))
398 return -ENODEV;
399
400 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
401 if (!priv)
402 return -ENOMEM;
403 dev_set_drvdata(&adevice->dev, priv);
404 ideapad_handle = adevice->handle;
405
406 ret = ideapad_platform_init(priv);
407 if (ret)
408 goto platform_failed;
409
410 ret = ideapad_input_init(priv);
411 if (ret)
412 goto input_failed;
413
414 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
415 if (test_bit(ideapad_rfk_data[i].cfgbit, (unsigned long *)&cfg))
416 ideapad_register_rfkill(adevice, i);
417 else
418 priv->rfk[i] = NULL;
419 }
420 ideapad_sync_rfk_state(adevice);
421
422 return 0;
423
424input_failed:
425 ideapad_platform_exit(priv);
426platform_failed:
427 kfree(priv);
428 return ret;
429}
430
431static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
432{
433 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
434 int i;
435
436 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
437 ideapad_unregister_rfkill(adevice, i);
438 ideapad_input_exit(priv);
439 ideapad_platform_exit(priv);
440 dev_set_drvdata(&adevice->dev, NULL);
441 kfree(priv);
442
443 return 0;
444}
445
446static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
447{
448 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
449 acpi_handle handle = adevice->handle;
450 unsigned long vpc1, vpc2, vpc_bit;
451
452 if (read_ec_data(handle, 0x10, &vpc1))
453 return;
454 if (read_ec_data(handle, 0x1A, &vpc2))
455 return;
456
457 vpc1 = (vpc2 << 8) | vpc1;
458 for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
459 if (test_bit(vpc_bit, &vpc1)) {
460 if (vpc_bit == 9)
461 ideapad_sync_rfk_state(adevice);
462 else
463 ideapad_input_report(priv, vpc_bit);
464 }
465 }
466}
467
468static struct acpi_driver ideapad_acpi_driver = {
469 .name = "ideapad_acpi",
470 .class = "IdeaPad",
471 .ids = ideapad_device_ids,
472 .ops.add = ideapad_acpi_add,
473 .ops.remove = ideapad_acpi_remove,
474 .ops.notify = ideapad_acpi_notify,
475 .owner = THIS_MODULE,
476};
477
478static int __init ideapad_acpi_module_init(void)
479{
480 return acpi_bus_register_driver(&ideapad_acpi_driver);
481}
482
483static void __exit ideapad_acpi_module_exit(void)
484{
485 acpi_bus_unregister_driver(&ideapad_acpi_driver);
486}
487
488MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
489MODULE_DESCRIPTION("IdeaPad ACPI Extras");
490MODULE_LICENSE("GPL");
491
492module_init(ideapad_acpi_module_init);
493module_exit(ideapad_acpi_module_exit);
494
