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
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>
34 #define IDEAPAD_RFKILL_DEV_NUM (3)
36 struct ideapad_private {
37 struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
38 struct platform_device *platform_device;
39 struct input_dev *inputdev;
42 static acpi_handle ideapad_handle;
43 static bool no_bt_rfkill;
44 module_param(no_bt_rfkill, bool, 0444);
45 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
50 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
52 static int read_method_int(acpi_handle handle, const char *method, int *val)
55 unsigned long long result;
57 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
58 if (ACPI_FAILURE(status)) {
67 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
70 unsigned long long result;
71 struct acpi_object_list params;
72 union acpi_object in_obj;
75 params.pointer = &in_obj;
76 in_obj.type = ACPI_TYPE_INTEGER;
77 in_obj.integer.value = cmd;
79 status = acpi_evaluate_integer(handle, "VPCR", ¶ms, &result);
81 if (ACPI_FAILURE(status)) {
90 static int method_vpcw(acpi_handle handle, int cmd, int data)
92 struct acpi_object_list params;
93 union acpi_object in_obj[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;
103 status = acpi_evaluate_object(handle, "VPCW", ¶ms, NULL);
109 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
112 unsigned long int end_jiffies;
114 if (method_vpcw(handle, 1, cmd))
117 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
118 time_before(jiffies, end_jiffies);) {
120 if (method_vpcr(handle, 1, &val))
123 if (method_vpcr(handle, 0, &val))
129 pr_err("timeout in read_ec_cmd\n");
133 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
136 unsigned long int end_jiffies;
138 if (method_vpcw(handle, 0, data))
140 if (method_vpcw(handle, 1, cmd))
143 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
144 time_before(jiffies, end_jiffies);) {
146 if (method_vpcr(handle, 1, &val))
151 pr_err("timeout in write_ec_cmd\n");
158 static ssize_t show_ideapad_cam(struct device *dev,
159 struct device_attribute *attr,
162 unsigned long result;
164 if (read_ec_data(ideapad_handle, 0x1D, &result))
165 return sprintf(buf, "-1\n");
166 return sprintf(buf, "%lu\n", result);
169 static ssize_t store_ideapad_cam(struct device *dev,
170 struct device_attribute *attr,
171 const char *buf, size_t count)
177 if (sscanf(buf, "%i", &state) != 1)
179 ret = write_ec_cmd(ideapad_handle, 0x1E, state);
185 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
190 struct ideapad_rfk_data {
197 const 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 },
203 static int ideapad_rfk_set(void *data, bool blocked)
205 unsigned long opcode = (unsigned long)data;
207 return write_ec_cmd(ideapad_handle, opcode, !blocked);
210 static struct rfkill_ops ideapad_rfk_ops = {
211 .set_block = ideapad_rfk_set,
214 static void ideapad_sync_rfk_state(struct acpi_device *adevice)
216 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
217 unsigned long hw_blocked;
220 if (read_ec_data(ideapad_handle, 0x23, &hw_blocked))
222 hw_blocked = !hw_blocked;
224 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
226 rfkill_set_hw_state(priv->rfk[i], hw_blocked);
229 static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
232 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
234 unsigned long sw_blocked;
237 (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
238 /* Force to enable bluetooth when no_bt_rfkill=1 */
239 write_ec_cmd(ideapad_handle,
240 ideapad_rfk_data[dev].opcode, 1);
244 priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
245 ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
250 if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
252 rfkill_init_sw_state(priv->rfk[dev], 0);
254 sw_blocked = !sw_blocked;
255 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
258 ret = rfkill_register(priv->rfk[dev]);
260 rfkill_destroy(priv->rfk[dev]);
266 static void __devexit ideapad_unregister_rfkill(struct acpi_device *adevice,
269 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
274 rfkill_unregister(priv->rfk[dev]);
275 rfkill_destroy(priv->rfk[dev]);
281 static struct attribute *ideapad_attributes[] = {
282 &dev_attr_camera_power.attr,
286 static struct attribute_group ideapad_attribute_group = {
287 .attrs = ideapad_attributes
290 static int __devinit ideapad_platform_init(struct ideapad_private *priv)
294 priv->platform_device = platform_device_alloc("ideapad", -1);
295 if (!priv->platform_device)
297 platform_set_drvdata(priv->platform_device, priv);
299 result = platform_device_add(priv->platform_device);
301 goto fail_platform_device;
303 result = sysfs_create_group(&priv->platform_device->dev.kobj,
304 &ideapad_attribute_group);
310 platform_device_del(priv->platform_device);
311 fail_platform_device:
312 platform_device_put(priv->platform_device);
316 static void ideapad_platform_exit(struct ideapad_private *priv)
318 sysfs_remove_group(&priv->platform_device->dev.kobj,
319 &ideapad_attribute_group);
320 platform_device_unregister(priv->platform_device);
326 static const struct key_entry ideapad_keymap[] = {
327 { KE_KEY, 0x06, { KEY_SWITCHVIDEOMODE } },
328 { KE_KEY, 0x0D, { KEY_WLAN } },
332 static int __devinit ideapad_input_init(struct ideapad_private *priv)
334 struct input_dev *inputdev;
337 inputdev = input_allocate_device();
339 pr_info("Unable to allocate input device\n");
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;
348 error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
350 pr_err("Unable to setup input device keymap\n");
354 error = input_register_device(inputdev);
356 pr_err("Unable to register input device\n");
357 goto err_free_keymap;
360 priv->inputdev = inputdev;
364 sparse_keymap_free(inputdev);
366 input_free_device(inputdev);
370 static void __devexit ideapad_input_exit(struct ideapad_private *priv)
372 sparse_keymap_free(priv->inputdev);
373 input_unregister_device(priv->inputdev);
374 priv->inputdev = NULL;
377 static void ideapad_input_report(struct ideapad_private *priv,
378 unsigned long scancode)
380 sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
386 static const struct acpi_device_id ideapad_device_ids[] = {
390 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
392 static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
395 struct ideapad_private *priv;
397 if (read_method_int(adevice->handle, "_CFG", &cfg))
400 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
403 dev_set_drvdata(&adevice->dev, priv);
404 ideapad_handle = adevice->handle;
406 ret = ideapad_platform_init(priv);
408 goto platform_failed;
410 ret = ideapad_input_init(priv);
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);
420 ideapad_sync_rfk_state(adevice);
425 ideapad_platform_exit(priv);
431 static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
433 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
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);
446 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
448 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
449 acpi_handle handle = adevice->handle;
450 unsigned long vpc1, vpc2, vpc_bit;
452 if (read_ec_data(handle, 0x10, &vpc1))
454 if (read_ec_data(handle, 0x1A, &vpc2))
457 vpc1 = (vpc2 << 8) | vpc1;
458 for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
459 if (test_bit(vpc_bit, &vpc1)) {
461 ideapad_sync_rfk_state(adevice);
463 ideapad_input_report(priv, vpc_bit);
468 static struct acpi_driver ideapad_acpi_driver = {
469 .name = "ideapad_acpi",
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,
478 static int __init ideapad_acpi_module_init(void)
480 return acpi_bus_register_driver(&ideapad_acpi_driver);
483 static void __exit ideapad_acpi_module_exit(void)
485 acpi_bus_unregister_driver(&ideapad_acpi_driver);
488 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
489 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
490 MODULE_LICENSE("GPL");
492 module_init(ideapad_acpi_module_init);
493 module_exit(ideapad_acpi_module_exit);