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 #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 <linux/acpi.h>
30 #include <linux/rfkill.h>
31 #include <linux/platform_device.h>
32 #include <linux/input.h>
33 #include <linux/input/sparse-keymap.h>
34 #include <linux/backlight.h>
36 #include <linux/debugfs.h>
37 #include <linux/seq_file.h>
38 #include <linux/i8042.h>
40 #define IDEAPAD_RFKILL_DEV_NUM (3)
42 #define CFG_BT_BIT (16)
43 #define CFG_3G_BIT (17)
44 #define CFG_WIFI_BIT (18)
45 #define CFG_CAMERA_BIT (19)
65 VPCCMD_R_ODD, /* 0x21 */
70 VPCCMD_R_SPECIAL_BUTTONS = 0x31,
71 VPCCMD_W_BL_POWER = 0x33,
74 struct ideapad_rfk_priv {
76 struct ideapad_private *priv;
79 struct ideapad_private {
80 struct acpi_device *adev;
81 struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
82 struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
83 struct platform_device *platform_device;
84 struct input_dev *inputdev;
85 struct backlight_device *blightdev;
90 static bool no_bt_rfkill;
91 module_param(no_bt_rfkill, bool, 0444);
92 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
97 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
99 static int read_method_int(acpi_handle handle, const char *method, int *val)
102 unsigned long long result;
104 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
105 if (ACPI_FAILURE(status)) {
114 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
117 unsigned long long result;
118 struct acpi_object_list params;
119 union acpi_object in_obj;
122 params.pointer = &in_obj;
123 in_obj.type = ACPI_TYPE_INTEGER;
124 in_obj.integer.value = cmd;
126 status = acpi_evaluate_integer(handle, "VPCR", ¶ms, &result);
128 if (ACPI_FAILURE(status)) {
137 static int method_vpcw(acpi_handle handle, int cmd, int data)
139 struct acpi_object_list params;
140 union acpi_object in_obj[2];
144 params.pointer = in_obj;
145 in_obj[0].type = ACPI_TYPE_INTEGER;
146 in_obj[0].integer.value = cmd;
147 in_obj[1].type = ACPI_TYPE_INTEGER;
148 in_obj[1].integer.value = data;
150 status = acpi_evaluate_object(handle, "VPCW", ¶ms, NULL);
156 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
159 unsigned long int end_jiffies;
161 if (method_vpcw(handle, 1, cmd))
164 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
165 time_before(jiffies, end_jiffies);) {
167 if (method_vpcr(handle, 1, &val))
170 if (method_vpcr(handle, 0, &val))
176 pr_err("timeout in read_ec_cmd\n");
180 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
183 unsigned long int end_jiffies;
185 if (method_vpcw(handle, 0, data))
187 if (method_vpcw(handle, 1, cmd))
190 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
191 time_before(jiffies, end_jiffies);) {
193 if (method_vpcr(handle, 1, &val))
198 pr_err("timeout in write_ec_cmd\n");
205 static int debugfs_status_show(struct seq_file *s, void *data)
207 struct ideapad_private *priv = s->private;
213 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
214 seq_printf(s, "Backlight max:\t%lu\n", value);
215 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
216 seq_printf(s, "Backlight now:\t%lu\n", value);
217 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
218 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
219 seq_printf(s, "=====================\n");
221 if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
222 seq_printf(s, "Radio status:\t%s(%lu)\n",
223 value ? "On" : "Off", value);
224 if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
225 seq_printf(s, "Wifi status:\t%s(%lu)\n",
226 value ? "On" : "Off", value);
227 if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
228 seq_printf(s, "BT status:\t%s(%lu)\n",
229 value ? "On" : "Off", value);
230 if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
231 seq_printf(s, "3G status:\t%s(%lu)\n",
232 value ? "On" : "Off", value);
233 seq_printf(s, "=====================\n");
235 if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
236 seq_printf(s, "Touchpad status:%s(%lu)\n",
237 value ? "On" : "Off", value);
238 if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
239 seq_printf(s, "Camera status:\t%s(%lu)\n",
240 value ? "On" : "Off", value);
245 static int debugfs_status_open(struct inode *inode, struct file *file)
247 return single_open(file, debugfs_status_show, inode->i_private);
250 static const struct file_operations debugfs_status_fops = {
251 .owner = THIS_MODULE,
252 .open = debugfs_status_open,
255 .release = single_release,
258 static int debugfs_cfg_show(struct seq_file *s, void *data)
260 struct ideapad_private *priv = s->private;
263 seq_printf(s, "cfg: N/A\n");
265 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
267 if (test_bit(CFG_BT_BIT, &priv->cfg))
268 seq_printf(s, "Bluetooth ");
269 if (test_bit(CFG_3G_BIT, &priv->cfg))
270 seq_printf(s, "3G ");
271 if (test_bit(CFG_WIFI_BIT, &priv->cfg))
272 seq_printf(s, "Wireless ");
273 if (test_bit(CFG_CAMERA_BIT, &priv->cfg))
274 seq_printf(s, "Camera ");
275 seq_printf(s, "\nGraphic: ");
276 switch ((priv->cfg)&0x700) {
278 seq_printf(s, "Intel");
281 seq_printf(s, "ATI");
284 seq_printf(s, "Nvidia");
287 seq_printf(s, "Intel and ATI");
290 seq_printf(s, "Intel and Nvidia");
298 static int debugfs_cfg_open(struct inode *inode, struct file *file)
300 return single_open(file, debugfs_cfg_show, inode->i_private);
303 static const struct file_operations debugfs_cfg_fops = {
304 .owner = THIS_MODULE,
305 .open = debugfs_cfg_open,
308 .release = single_release,
311 static int ideapad_debugfs_init(struct ideapad_private *priv)
315 priv->debug = debugfs_create_dir("ideapad", NULL);
316 if (priv->debug == NULL) {
317 pr_err("failed to create debugfs directory");
321 node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv,
324 pr_err("failed to create cfg in debugfs");
328 node = debugfs_create_file("status", S_IRUGO, priv->debug, priv,
329 &debugfs_status_fops);
331 pr_err("failed to create status in debugfs");
341 static void ideapad_debugfs_exit(struct ideapad_private *priv)
343 debugfs_remove_recursive(priv->debug);
350 static ssize_t show_ideapad_cam(struct device *dev,
351 struct device_attribute *attr,
354 unsigned long result;
355 struct ideapad_private *priv = dev_get_drvdata(dev);
357 if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result))
358 return sprintf(buf, "-1\n");
359 return sprintf(buf, "%lu\n", result);
362 static ssize_t store_ideapad_cam(struct device *dev,
363 struct device_attribute *attr,
364 const char *buf, size_t count)
367 struct ideapad_private *priv = dev_get_drvdata(dev);
371 if (sscanf(buf, "%i", &state) != 1)
373 ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
379 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
381 static ssize_t show_ideapad_fan(struct device *dev,
382 struct device_attribute *attr,
385 unsigned long result;
386 struct ideapad_private *priv = dev_get_drvdata(dev);
388 if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result))
389 return sprintf(buf, "-1\n");
390 return sprintf(buf, "%lu\n", result);
393 static ssize_t store_ideapad_fan(struct device *dev,
394 struct device_attribute *attr,
395 const char *buf, size_t count)
398 struct ideapad_private *priv = dev_get_drvdata(dev);
402 if (sscanf(buf, "%i", &state) != 1)
404 if (state < 0 || state > 4 || state == 3)
406 ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
412 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
414 static struct attribute *ideapad_attributes[] = {
415 &dev_attr_camera_power.attr,
416 &dev_attr_fan_mode.attr,
420 static umode_t ideapad_is_visible(struct kobject *kobj,
421 struct attribute *attr,
424 struct device *dev = container_of(kobj, struct device, kobj);
425 struct ideapad_private *priv = dev_get_drvdata(dev);
428 if (attr == &dev_attr_camera_power.attr)
429 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
430 else if (attr == &dev_attr_fan_mode.attr) {
432 supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN,
437 return supported ? attr->mode : 0;
440 static struct attribute_group ideapad_attribute_group = {
441 .is_visible = ideapad_is_visible,
442 .attrs = ideapad_attributes
448 struct ideapad_rfk_data {
455 const struct ideapad_rfk_data ideapad_rfk_data[] = {
456 { "ideapad_wlan", CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
457 { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
458 { "ideapad_3g", CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
461 static int ideapad_rfk_set(void *data, bool blocked)
463 struct ideapad_rfk_priv *priv = data;
465 return write_ec_cmd(priv->priv->adev->handle, priv->dev, !blocked);
468 static struct rfkill_ops ideapad_rfk_ops = {
469 .set_block = ideapad_rfk_set,
472 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
474 unsigned long hw_blocked;
477 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
479 hw_blocked = !hw_blocked;
481 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
483 rfkill_set_hw_state(priv->rfk[i], hw_blocked);
486 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
489 unsigned long sw_blocked;
492 (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
493 /* Force to enable bluetooth when no_bt_rfkill=1 */
494 write_ec_cmd(priv->adev->handle,
495 ideapad_rfk_data[dev].opcode, 1);
498 priv->rfk_priv[dev].dev = dev;
499 priv->rfk_priv[dev].priv = priv;
501 priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
502 &priv->platform_device->dev,
503 ideapad_rfk_data[dev].type,
505 &priv->rfk_priv[dev]);
509 if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
511 rfkill_init_sw_state(priv->rfk[dev], 0);
513 sw_blocked = !sw_blocked;
514 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
517 ret = rfkill_register(priv->rfk[dev]);
519 rfkill_destroy(priv->rfk[dev]);
525 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
530 rfkill_unregister(priv->rfk[dev]);
531 rfkill_destroy(priv->rfk[dev]);
537 static int ideapad_sysfs_init(struct ideapad_private *priv)
539 return sysfs_create_group(&priv->platform_device->dev.kobj,
540 &ideapad_attribute_group);
543 static void ideapad_sysfs_exit(struct ideapad_private *priv)
545 sysfs_remove_group(&priv->platform_device->dev.kobj,
546 &ideapad_attribute_group);
552 static const struct key_entry ideapad_keymap[] = {
553 { KE_KEY, 6, { KEY_SWITCHVIDEOMODE } },
554 { KE_KEY, 7, { KEY_CAMERA } },
555 { KE_KEY, 11, { KEY_F16 } },
556 { KE_KEY, 13, { KEY_WLAN } },
557 { KE_KEY, 16, { KEY_PROG1 } },
558 { KE_KEY, 17, { KEY_PROG2 } },
559 { KE_KEY, 64, { KEY_PROG3 } },
560 { KE_KEY, 65, { KEY_PROG4 } },
561 { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
562 { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
566 static int ideapad_input_init(struct ideapad_private *priv)
568 struct input_dev *inputdev;
571 inputdev = input_allocate_device();
575 inputdev->name = "Ideapad extra buttons";
576 inputdev->phys = "ideapad/input0";
577 inputdev->id.bustype = BUS_HOST;
578 inputdev->dev.parent = &priv->platform_device->dev;
580 error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
582 pr_err("Unable to setup input device keymap\n");
586 error = input_register_device(inputdev);
588 pr_err("Unable to register input device\n");
589 goto err_free_keymap;
592 priv->inputdev = inputdev;
596 sparse_keymap_free(inputdev);
598 input_free_device(inputdev);
602 static void ideapad_input_exit(struct ideapad_private *priv)
604 sparse_keymap_free(priv->inputdev);
605 input_unregister_device(priv->inputdev);
606 priv->inputdev = NULL;
609 static void ideapad_input_report(struct ideapad_private *priv,
610 unsigned long scancode)
612 sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
615 static void ideapad_input_novokey(struct ideapad_private *priv)
617 unsigned long long_pressed;
619 if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
622 ideapad_input_report(priv, 17);
624 ideapad_input_report(priv, 16);
627 static void ideapad_check_special_buttons(struct ideapad_private *priv)
629 unsigned long bit, value;
631 read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
633 for (bit = 0; bit < 16; bit++) {
634 if (test_bit(bit, &value)) {
638 /* Thermal Management button */
639 ideapad_input_report(priv, 65);
642 /* OneKey Theater button */
643 ideapad_input_report(priv, 64);
646 pr_info("Unknown special button: %lu\n", bit);
656 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
658 struct ideapad_private *priv = bl_get_data(blightdev);
664 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
669 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
671 struct ideapad_private *priv = bl_get_data(blightdev);
676 if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
677 blightdev->props.brightness))
679 if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
680 blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
686 static const struct backlight_ops ideapad_backlight_ops = {
687 .get_brightness = ideapad_backlight_get_brightness,
688 .update_status = ideapad_backlight_update_status,
691 static int ideapad_backlight_init(struct ideapad_private *priv)
693 struct backlight_device *blightdev;
694 struct backlight_properties props;
695 unsigned long max, now, power;
697 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
699 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
701 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
704 memset(&props, 0, sizeof(struct backlight_properties));
705 props.max_brightness = max;
706 props.type = BACKLIGHT_PLATFORM;
707 blightdev = backlight_device_register("ideapad",
708 &priv->platform_device->dev,
710 &ideapad_backlight_ops,
712 if (IS_ERR(blightdev)) {
713 pr_err("Could not register backlight device\n");
714 return PTR_ERR(blightdev);
717 priv->blightdev = blightdev;
718 blightdev->props.brightness = now;
719 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
720 backlight_update_status(blightdev);
725 static void ideapad_backlight_exit(struct ideapad_private *priv)
728 backlight_device_unregister(priv->blightdev);
729 priv->blightdev = NULL;
732 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
735 struct backlight_device *blightdev = priv->blightdev;
739 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
741 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
744 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
748 /* if we control brightness via acpi video driver */
749 if (priv->blightdev == NULL) {
750 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
754 backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
760 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
764 /* Without reading from EC touchpad LED doesn't switch state */
765 if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
766 /* Some IdeaPads don't really turn off touchpad - they only
767 * switch the LED state. We (de)activate KBC AUX port to turn
768 * touchpad off and on. We send KEY_TOUCHPAD_OFF and
769 * KEY_TOUCHPAD_ON to not to get out of sync with LED */
771 i8042_command(¶m, value ? I8042_CMD_AUX_ENABLE :
772 I8042_CMD_AUX_DISABLE);
773 ideapad_input_report(priv, value ? 67 : 66);
777 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
779 struct ideapad_private *priv = data;
780 unsigned long vpc1, vpc2, vpc_bit;
782 if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
784 if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
787 vpc1 = (vpc2 << 8) | vpc1;
788 for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
789 if (test_bit(vpc_bit, &vpc1)) {
792 ideapad_sync_rfk_state(priv);
798 ideapad_input_report(priv, vpc_bit);
801 ideapad_sync_touchpad_state(priv);
804 ideapad_backlight_notify_brightness(priv);
807 ideapad_input_novokey(priv);
810 ideapad_backlight_notify_power(priv);
813 ideapad_check_special_buttons(priv);
816 pr_info("Unknown event: %lu\n", vpc_bit);
822 static int ideapad_acpi_add(struct platform_device *pdev)
826 struct ideapad_private *priv;
827 struct acpi_device *adev;
829 ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
833 if (read_method_int(adev->handle, "_CFG", &cfg))
836 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
840 dev_set_drvdata(&pdev->dev, priv);
843 priv->platform_device = pdev;
845 ret = ideapad_sysfs_init(priv);
849 ret = ideapad_debugfs_init(priv);
853 ret = ideapad_input_init(priv);
857 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
858 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
859 ideapad_register_rfkill(priv, i);
863 ideapad_sync_rfk_state(priv);
864 ideapad_sync_touchpad_state(priv);
866 if (!acpi_video_backlight_support()) {
867 ret = ideapad_backlight_init(priv);
868 if (ret && ret != -ENODEV)
869 goto backlight_failed;
871 ret = acpi_install_notify_handler(adev->handle,
872 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
874 goto notification_failed;
878 ideapad_backlight_exit(priv);
880 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
881 ideapad_unregister_rfkill(priv, i);
882 ideapad_input_exit(priv);
884 ideapad_debugfs_exit(priv);
886 ideapad_sysfs_exit(priv);
892 static int ideapad_acpi_remove(struct platform_device *pdev)
894 struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
897 acpi_remove_notify_handler(priv->adev->handle,
898 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
899 ideapad_backlight_exit(priv);
900 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
901 ideapad_unregister_rfkill(priv, i);
902 ideapad_input_exit(priv);
903 ideapad_debugfs_exit(priv);
904 ideapad_sysfs_exit(priv);
905 dev_set_drvdata(&pdev->dev, NULL);
911 #ifdef CONFIG_PM_SLEEP
912 static int ideapad_acpi_resume(struct device *device)
914 struct ideapad_private *priv;
918 priv = dev_get_drvdata(device);
920 ideapad_sync_rfk_state(priv);
921 ideapad_sync_touchpad_state(priv);
925 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
927 static const struct acpi_device_id ideapad_device_ids[] = {
931 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
933 static struct platform_driver ideapad_acpi_driver = {
934 .probe = ideapad_acpi_add,
935 .remove = ideapad_acpi_remove,
937 .name = "ideapad_acpi",
938 .owner = THIS_MODULE,
940 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
944 module_platform_driver(ideapad_acpi_driver);
946 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
947 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
948 MODULE_LICENSE("GPL");