Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[linux-btrfs-devel.git] / drivers / platform / x86 / ideapad-laptop.c
blob0c595410e78897e8b6b3f4b9e9c84e765ac0ba57
1 /*
2 * ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
4 * Copyright © 2010 Intel Corporation
5 * Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
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.
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.
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.
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
38 #define IDEAPAD_RFKILL_DEV_NUM (3)
40 #define CFG_BT_BIT (16)
41 #define CFG_3G_BIT (17)
42 #define CFG_WIFI_BIT (18)
43 #define CFG_CAMERA_BIT (19)
45 struct ideapad_private {
46 struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
47 struct platform_device *platform_device;
48 struct input_dev *inputdev;
49 struct backlight_device *blightdev;
50 unsigned long cfg;
53 static acpi_handle ideapad_handle;
54 static bool no_bt_rfkill;
55 module_param(no_bt_rfkill, bool, 0444);
56 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
59 * ACPI Helpers
61 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
63 static int read_method_int(acpi_handle handle, const char *method, int *val)
65 acpi_status status;
66 unsigned long long result;
68 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
69 if (ACPI_FAILURE(status)) {
70 *val = -1;
71 return -1;
72 } else {
73 *val = result;
74 return 0;
78 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
80 acpi_status status;
81 unsigned long long result;
82 struct acpi_object_list params;
83 union acpi_object in_obj;
85 params.count = 1;
86 params.pointer = &in_obj;
87 in_obj.type = ACPI_TYPE_INTEGER;
88 in_obj.integer.value = cmd;
90 status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
92 if (ACPI_FAILURE(status)) {
93 *ret = -1;
94 return -1;
95 } else {
96 *ret = result;
97 return 0;
101 static int method_vpcw(acpi_handle handle, int cmd, int data)
103 struct acpi_object_list params;
104 union acpi_object in_obj[2];
105 acpi_status status;
107 params.count = 2;
108 params.pointer = in_obj;
109 in_obj[0].type = ACPI_TYPE_INTEGER;
110 in_obj[0].integer.value = cmd;
111 in_obj[1].type = ACPI_TYPE_INTEGER;
112 in_obj[1].integer.value = data;
114 status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
115 if (status != AE_OK)
116 return -1;
117 return 0;
120 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
122 int val;
123 unsigned long int end_jiffies;
125 if (method_vpcw(handle, 1, cmd))
126 return -1;
128 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
129 time_before(jiffies, end_jiffies);) {
130 schedule();
131 if (method_vpcr(handle, 1, &val))
132 return -1;
133 if (val == 0) {
134 if (method_vpcr(handle, 0, &val))
135 return -1;
136 *data = val;
137 return 0;
140 pr_err("timeout in read_ec_cmd\n");
141 return -1;
144 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
146 int val;
147 unsigned long int end_jiffies;
149 if (method_vpcw(handle, 0, data))
150 return -1;
151 if (method_vpcw(handle, 1, cmd))
152 return -1;
154 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
155 time_before(jiffies, end_jiffies);) {
156 schedule();
157 if (method_vpcr(handle, 1, &val))
158 return -1;
159 if (val == 0)
160 return 0;
162 pr_err("timeout in write_ec_cmd\n");
163 return -1;
167 * sysfs
169 static ssize_t show_ideapad_cam(struct device *dev,
170 struct device_attribute *attr,
171 char *buf)
173 unsigned long result;
175 if (read_ec_data(ideapad_handle, 0x1D, &result))
176 return sprintf(buf, "-1\n");
177 return sprintf(buf, "%lu\n", result);
180 static ssize_t store_ideapad_cam(struct device *dev,
181 struct device_attribute *attr,
182 const char *buf, size_t count)
184 int ret, state;
186 if (!count)
187 return 0;
188 if (sscanf(buf, "%i", &state) != 1)
189 return -EINVAL;
190 ret = write_ec_cmd(ideapad_handle, 0x1E, state);
191 if (ret < 0)
192 return ret;
193 return count;
196 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
198 static ssize_t show_ideapad_cfg(struct device *dev,
199 struct device_attribute *attr,
200 char *buf)
202 struct ideapad_private *priv = dev_get_drvdata(dev);
204 return sprintf(buf, "0x%.8lX\n", priv->cfg);
207 static DEVICE_ATTR(cfg, 0444, show_ideapad_cfg, NULL);
209 static struct attribute *ideapad_attributes[] = {
210 &dev_attr_camera_power.attr,
211 &dev_attr_cfg.attr,
212 NULL
215 static mode_t ideapad_is_visible(struct kobject *kobj,
216 struct attribute *attr,
217 int idx)
219 struct device *dev = container_of(kobj, struct device, kobj);
220 struct ideapad_private *priv = dev_get_drvdata(dev);
221 bool supported;
223 if (attr == &dev_attr_camera_power.attr)
224 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
225 else
226 supported = true;
228 return supported ? attr->mode : 0;
231 static struct attribute_group ideapad_attribute_group = {
232 .is_visible = ideapad_is_visible,
233 .attrs = ideapad_attributes
237 * Rfkill
239 struct ideapad_rfk_data {
240 char *name;
241 int cfgbit;
242 int opcode;
243 int type;
246 const struct ideapad_rfk_data ideapad_rfk_data[] = {
247 { "ideapad_wlan", CFG_WIFI_BIT, 0x15, RFKILL_TYPE_WLAN },
248 { "ideapad_bluetooth", CFG_BT_BIT, 0x17, RFKILL_TYPE_BLUETOOTH },
249 { "ideapad_3g", CFG_3G_BIT, 0x20, RFKILL_TYPE_WWAN },
252 static int ideapad_rfk_set(void *data, bool blocked)
254 unsigned long opcode = (unsigned long)data;
256 return write_ec_cmd(ideapad_handle, opcode, !blocked);
259 static struct rfkill_ops ideapad_rfk_ops = {
260 .set_block = ideapad_rfk_set,
263 static void ideapad_sync_rfk_state(struct acpi_device *adevice)
265 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
266 unsigned long hw_blocked;
267 int i;
269 if (read_ec_data(ideapad_handle, 0x23, &hw_blocked))
270 return;
271 hw_blocked = !hw_blocked;
273 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
274 if (priv->rfk[i])
275 rfkill_set_hw_state(priv->rfk[i], hw_blocked);
278 static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
279 int dev)
281 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
282 int ret;
283 unsigned long sw_blocked;
285 if (no_bt_rfkill &&
286 (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
287 /* Force to enable bluetooth when no_bt_rfkill=1 */
288 write_ec_cmd(ideapad_handle,
289 ideapad_rfk_data[dev].opcode, 1);
290 return 0;
293 priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
294 ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
295 (void *)(long)dev);
296 if (!priv->rfk[dev])
297 return -ENOMEM;
299 if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
300 &sw_blocked)) {
301 rfkill_init_sw_state(priv->rfk[dev], 0);
302 } else {
303 sw_blocked = !sw_blocked;
304 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
307 ret = rfkill_register(priv->rfk[dev]);
308 if (ret) {
309 rfkill_destroy(priv->rfk[dev]);
310 return ret;
312 return 0;
315 static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
317 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
319 if (!priv->rfk[dev])
320 return;
322 rfkill_unregister(priv->rfk[dev]);
323 rfkill_destroy(priv->rfk[dev]);
327 * Platform device
329 static int __devinit ideapad_platform_init(struct ideapad_private *priv)
331 int result;
333 priv->platform_device = platform_device_alloc("ideapad", -1);
334 if (!priv->platform_device)
335 return -ENOMEM;
336 platform_set_drvdata(priv->platform_device, priv);
338 result = platform_device_add(priv->platform_device);
339 if (result)
340 goto fail_platform_device;
342 result = sysfs_create_group(&priv->platform_device->dev.kobj,
343 &ideapad_attribute_group);
344 if (result)
345 goto fail_sysfs;
346 return 0;
348 fail_sysfs:
349 platform_device_del(priv->platform_device);
350 fail_platform_device:
351 platform_device_put(priv->platform_device);
352 return result;
355 static void ideapad_platform_exit(struct ideapad_private *priv)
357 sysfs_remove_group(&priv->platform_device->dev.kobj,
358 &ideapad_attribute_group);
359 platform_device_unregister(priv->platform_device);
363 * input device
365 static const struct key_entry ideapad_keymap[] = {
366 { KE_KEY, 0x06, { KEY_SWITCHVIDEOMODE } },
367 { KE_KEY, 0x0D, { KEY_WLAN } },
368 { KE_END, 0 },
371 static int __devinit ideapad_input_init(struct ideapad_private *priv)
373 struct input_dev *inputdev;
374 int error;
376 inputdev = input_allocate_device();
377 if (!inputdev) {
378 pr_info("Unable to allocate input device\n");
379 return -ENOMEM;
382 inputdev->name = "Ideapad extra buttons";
383 inputdev->phys = "ideapad/input0";
384 inputdev->id.bustype = BUS_HOST;
385 inputdev->dev.parent = &priv->platform_device->dev;
387 error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
388 if (error) {
389 pr_err("Unable to setup input device keymap\n");
390 goto err_free_dev;
393 error = input_register_device(inputdev);
394 if (error) {
395 pr_err("Unable to register input device\n");
396 goto err_free_keymap;
399 priv->inputdev = inputdev;
400 return 0;
402 err_free_keymap:
403 sparse_keymap_free(inputdev);
404 err_free_dev:
405 input_free_device(inputdev);
406 return error;
409 static void ideapad_input_exit(struct ideapad_private *priv)
411 sparse_keymap_free(priv->inputdev);
412 input_unregister_device(priv->inputdev);
413 priv->inputdev = NULL;
416 static void ideapad_input_report(struct ideapad_private *priv,
417 unsigned long scancode)
419 sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
423 * backlight
425 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
427 unsigned long now;
429 if (read_ec_data(ideapad_handle, 0x12, &now))
430 return -EIO;
431 return now;
434 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
436 if (write_ec_cmd(ideapad_handle, 0x13, blightdev->props.brightness))
437 return -EIO;
438 if (write_ec_cmd(ideapad_handle, 0x33,
439 blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
440 return -EIO;
442 return 0;
445 static const struct backlight_ops ideapad_backlight_ops = {
446 .get_brightness = ideapad_backlight_get_brightness,
447 .update_status = ideapad_backlight_update_status,
450 static int ideapad_backlight_init(struct ideapad_private *priv)
452 struct backlight_device *blightdev;
453 struct backlight_properties props;
454 unsigned long max, now, power;
456 if (read_ec_data(ideapad_handle, 0x11, &max))
457 return -EIO;
458 if (read_ec_data(ideapad_handle, 0x12, &now))
459 return -EIO;
460 if (read_ec_data(ideapad_handle, 0x18, &power))
461 return -EIO;
463 memset(&props, 0, sizeof(struct backlight_properties));
464 props.max_brightness = max;
465 props.type = BACKLIGHT_PLATFORM;
466 blightdev = backlight_device_register("ideapad",
467 &priv->platform_device->dev,
468 priv,
469 &ideapad_backlight_ops,
470 &props);
471 if (IS_ERR(blightdev)) {
472 pr_err("Could not register backlight device\n");
473 return PTR_ERR(blightdev);
476 priv->blightdev = blightdev;
477 blightdev->props.brightness = now;
478 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
479 backlight_update_status(blightdev);
481 return 0;
484 static void ideapad_backlight_exit(struct ideapad_private *priv)
486 if (priv->blightdev)
487 backlight_device_unregister(priv->blightdev);
488 priv->blightdev = NULL;
491 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
493 unsigned long power;
494 struct backlight_device *blightdev = priv->blightdev;
496 if (read_ec_data(ideapad_handle, 0x18, &power))
497 return;
498 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
501 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
503 unsigned long now;
505 /* if we control brightness via acpi video driver */
506 if (priv->blightdev == NULL) {
507 read_ec_data(ideapad_handle, 0x12, &now);
508 return;
511 backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
515 * module init/exit
517 static const struct acpi_device_id ideapad_device_ids[] = {
518 { "VPC2004", 0},
519 { "", 0},
521 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
523 static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
525 int ret, i;
526 unsigned long cfg;
527 struct ideapad_private *priv;
529 if (read_method_int(adevice->handle, "_CFG", (int *)&cfg))
530 return -ENODEV;
532 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
533 if (!priv)
534 return -ENOMEM;
535 dev_set_drvdata(&adevice->dev, priv);
536 ideapad_handle = adevice->handle;
537 priv->cfg = cfg;
539 ret = ideapad_platform_init(priv);
540 if (ret)
541 goto platform_failed;
543 ret = ideapad_input_init(priv);
544 if (ret)
545 goto input_failed;
547 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
548 if (test_bit(ideapad_rfk_data[i].cfgbit, &cfg))
549 ideapad_register_rfkill(adevice, i);
550 else
551 priv->rfk[i] = NULL;
553 ideapad_sync_rfk_state(adevice);
555 if (!acpi_video_backlight_support()) {
556 ret = ideapad_backlight_init(priv);
557 if (ret && ret != -ENODEV)
558 goto backlight_failed;
561 return 0;
563 backlight_failed:
564 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
565 ideapad_unregister_rfkill(adevice, i);
566 ideapad_input_exit(priv);
567 input_failed:
568 ideapad_platform_exit(priv);
569 platform_failed:
570 kfree(priv);
571 return ret;
574 static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
576 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
577 int i;
579 ideapad_backlight_exit(priv);
580 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
581 ideapad_unregister_rfkill(adevice, i);
582 ideapad_input_exit(priv);
583 ideapad_platform_exit(priv);
584 dev_set_drvdata(&adevice->dev, NULL);
585 kfree(priv);
587 return 0;
590 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
592 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
593 acpi_handle handle = adevice->handle;
594 unsigned long vpc1, vpc2, vpc_bit;
596 if (read_ec_data(handle, 0x10, &vpc1))
597 return;
598 if (read_ec_data(handle, 0x1A, &vpc2))
599 return;
601 vpc1 = (vpc2 << 8) | vpc1;
602 for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
603 if (test_bit(vpc_bit, &vpc1)) {
604 switch (vpc_bit) {
605 case 9:
606 ideapad_sync_rfk_state(adevice);
607 break;
608 case 4:
609 ideapad_backlight_notify_brightness(priv);
610 break;
611 case 2:
612 ideapad_backlight_notify_power(priv);
613 break;
614 default:
615 ideapad_input_report(priv, vpc_bit);
621 static struct acpi_driver ideapad_acpi_driver = {
622 .name = "ideapad_acpi",
623 .class = "IdeaPad",
624 .ids = ideapad_device_ids,
625 .ops.add = ideapad_acpi_add,
626 .ops.remove = ideapad_acpi_remove,
627 .ops.notify = ideapad_acpi_notify,
628 .owner = THIS_MODULE,
631 static int __init ideapad_acpi_module_init(void)
633 return acpi_bus_register_driver(&ideapad_acpi_driver);
636 static void __exit ideapad_acpi_module_exit(void)
638 acpi_bus_unregister_driver(&ideapad_acpi_driver);
641 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
642 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
643 MODULE_LICENSE("GPL");
645 module_init(ideapad_acpi_module_init);
646 module_exit(ideapad_acpi_module_exit);