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 <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>
37 #include <linux/debugfs.h>
38 #include <linux/seq_file.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 */
68 VPCCMD_W_BL_POWER = 0x33,
71 struct ideapad_private {
72 struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
73 struct platform_device *platform_device;
74 struct input_dev *inputdev;
75 struct backlight_device *blightdev;
80 static acpi_handle ideapad_handle;
81 static struct ideapad_private *ideapad_priv;
82 static bool no_bt_rfkill;
83 module_param(no_bt_rfkill, bool, 0444);
84 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
89 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
91 static int read_method_int(acpi_handle handle, const char *method, int *val)
94 unsigned long long result;
96 status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
97 if (ACPI_FAILURE(status)) {
106 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
109 unsigned long long result;
110 struct acpi_object_list params;
111 union acpi_object in_obj;
114 params.pointer = &in_obj;
115 in_obj.type = ACPI_TYPE_INTEGER;
116 in_obj.integer.value = cmd;
118 status = acpi_evaluate_integer(handle, "VPCR", ¶ms, &result);
120 if (ACPI_FAILURE(status)) {
129 static int method_vpcw(acpi_handle handle, int cmd, int data)
131 struct acpi_object_list params;
132 union acpi_object in_obj[2];
136 params.pointer = in_obj;
137 in_obj[0].type = ACPI_TYPE_INTEGER;
138 in_obj[0].integer.value = cmd;
139 in_obj[1].type = ACPI_TYPE_INTEGER;
140 in_obj[1].integer.value = data;
142 status = acpi_evaluate_object(handle, "VPCW", ¶ms, NULL);
148 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
151 unsigned long int end_jiffies;
153 if (method_vpcw(handle, 1, cmd))
156 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
157 time_before(jiffies, end_jiffies);) {
159 if (method_vpcr(handle, 1, &val))
162 if (method_vpcr(handle, 0, &val))
168 pr_err("timeout in read_ec_cmd\n");
172 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
175 unsigned long int end_jiffies;
177 if (method_vpcw(handle, 0, data))
179 if (method_vpcw(handle, 1, cmd))
182 for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
183 time_before(jiffies, end_jiffies);) {
185 if (method_vpcr(handle, 1, &val))
190 pr_err("timeout in write_ec_cmd\n");
197 static int debugfs_status_show(struct seq_file *s, void *data)
201 if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &value))
202 seq_printf(s, "Backlight max:\t%lu\n", value);
203 if (!read_ec_data(ideapad_handle, VPCCMD_R_BL, &value))
204 seq_printf(s, "Backlight now:\t%lu\n", value);
205 if (!read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &value))
206 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
207 seq_printf(s, "=====================\n");
209 if (!read_ec_data(ideapad_handle, VPCCMD_R_RF, &value))
210 seq_printf(s, "Radio status:\t%s(%lu)\n",
211 value ? "On" : "Off", value);
212 if (!read_ec_data(ideapad_handle, VPCCMD_R_WIFI, &value))
213 seq_printf(s, "Wifi status:\t%s(%lu)\n",
214 value ? "On" : "Off", value);
215 if (!read_ec_data(ideapad_handle, VPCCMD_R_BT, &value))
216 seq_printf(s, "BT status:\t%s(%lu)\n",
217 value ? "On" : "Off", value);
218 if (!read_ec_data(ideapad_handle, VPCCMD_R_3G, &value))
219 seq_printf(s, "3G status:\t%s(%lu)\n",
220 value ? "On" : "Off", value);
221 seq_printf(s, "=====================\n");
223 if (!read_ec_data(ideapad_handle, VPCCMD_R_TOUCHPAD, &value))
224 seq_printf(s, "Touchpad status:%s(%lu)\n",
225 value ? "On" : "Off", value);
226 if (!read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &value))
227 seq_printf(s, "Camera status:\t%s(%lu)\n",
228 value ? "On" : "Off", value);
233 static int debugfs_status_open(struct inode *inode, struct file *file)
235 return single_open(file, debugfs_status_show, NULL);
238 static const struct file_operations debugfs_status_fops = {
239 .owner = THIS_MODULE,
240 .open = debugfs_status_open,
243 .release = single_release,
246 static int debugfs_cfg_show(struct seq_file *s, void *data)
249 seq_printf(s, "cfg: N/A\n");
251 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
253 if (test_bit(CFG_BT_BIT, &ideapad_priv->cfg))
254 seq_printf(s, "Bluetooth ");
255 if (test_bit(CFG_3G_BIT, &ideapad_priv->cfg))
256 seq_printf(s, "3G ");
257 if (test_bit(CFG_WIFI_BIT, &ideapad_priv->cfg))
258 seq_printf(s, "Wireless ");
259 if (test_bit(CFG_CAMERA_BIT, &ideapad_priv->cfg))
260 seq_printf(s, "Camera ");
261 seq_printf(s, "\nGraphic: ");
262 switch ((ideapad_priv->cfg)&0x700) {
264 seq_printf(s, "Intel");
267 seq_printf(s, "ATI");
270 seq_printf(s, "Nvidia");
273 seq_printf(s, "Intel and ATI");
276 seq_printf(s, "Intel and Nvidia");
284 static int debugfs_cfg_open(struct inode *inode, struct file *file)
286 return single_open(file, debugfs_cfg_show, NULL);
289 static const struct file_operations debugfs_cfg_fops = {
290 .owner = THIS_MODULE,
291 .open = debugfs_cfg_open,
294 .release = single_release,
297 static int __devinit ideapad_debugfs_init(struct ideapad_private *priv)
301 priv->debug = debugfs_create_dir("ideapad", NULL);
302 if (priv->debug == NULL) {
303 pr_err("failed to create debugfs directory");
307 node = debugfs_create_file("cfg", S_IRUGO, priv->debug, NULL,
310 pr_err("failed to create cfg in debugfs");
314 node = debugfs_create_file("status", S_IRUGO, priv->debug, NULL,
315 &debugfs_status_fops);
317 pr_err("failed to create status in debugfs");
327 static void ideapad_debugfs_exit(struct ideapad_private *priv)
329 debugfs_remove_recursive(priv->debug);
336 static ssize_t show_ideapad_cam(struct device *dev,
337 struct device_attribute *attr,
340 unsigned long result;
342 if (read_ec_data(ideapad_handle, VPCCMD_R_CAMERA, &result))
343 return sprintf(buf, "-1\n");
344 return sprintf(buf, "%lu\n", result);
347 static ssize_t store_ideapad_cam(struct device *dev,
348 struct device_attribute *attr,
349 const char *buf, size_t count)
355 if (sscanf(buf, "%i", &state) != 1)
357 ret = write_ec_cmd(ideapad_handle, VPCCMD_W_CAMERA, state);
363 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
365 static struct attribute *ideapad_attributes[] = {
366 &dev_attr_camera_power.attr,
370 static umode_t ideapad_is_visible(struct kobject *kobj,
371 struct attribute *attr,
374 struct device *dev = container_of(kobj, struct device, kobj);
375 struct ideapad_private *priv = dev_get_drvdata(dev);
378 if (attr == &dev_attr_camera_power.attr)
379 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
383 return supported ? attr->mode : 0;
386 static struct attribute_group ideapad_attribute_group = {
387 .is_visible = ideapad_is_visible,
388 .attrs = ideapad_attributes
394 struct ideapad_rfk_data {
401 const struct ideapad_rfk_data ideapad_rfk_data[] = {
402 { "ideapad_wlan", CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
403 { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
404 { "ideapad_3g", CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
407 static int ideapad_rfk_set(void *data, bool blocked)
409 unsigned long opcode = (unsigned long)data;
411 return write_ec_cmd(ideapad_handle, opcode, !blocked);
414 static struct rfkill_ops ideapad_rfk_ops = {
415 .set_block = ideapad_rfk_set,
418 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
420 unsigned long hw_blocked;
423 if (read_ec_data(ideapad_handle, VPCCMD_R_RF, &hw_blocked))
425 hw_blocked = !hw_blocked;
427 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
429 rfkill_set_hw_state(priv->rfk[i], hw_blocked);
432 static int __devinit ideapad_register_rfkill(struct acpi_device *adevice,
435 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
437 unsigned long sw_blocked;
440 (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
441 /* Force to enable bluetooth when no_bt_rfkill=1 */
442 write_ec_cmd(ideapad_handle,
443 ideapad_rfk_data[dev].opcode, 1);
447 priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name, &adevice->dev,
448 ideapad_rfk_data[dev].type, &ideapad_rfk_ops,
453 if (read_ec_data(ideapad_handle, ideapad_rfk_data[dev].opcode-1,
455 rfkill_init_sw_state(priv->rfk[dev], 0);
457 sw_blocked = !sw_blocked;
458 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
461 ret = rfkill_register(priv->rfk[dev]);
463 rfkill_destroy(priv->rfk[dev]);
469 static void ideapad_unregister_rfkill(struct acpi_device *adevice, int dev)
471 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
476 rfkill_unregister(priv->rfk[dev]);
477 rfkill_destroy(priv->rfk[dev]);
483 static int __devinit ideapad_platform_init(struct ideapad_private *priv)
487 priv->platform_device = platform_device_alloc("ideapad", -1);
488 if (!priv->platform_device)
490 platform_set_drvdata(priv->platform_device, priv);
492 result = platform_device_add(priv->platform_device);
494 goto fail_platform_device;
496 result = sysfs_create_group(&priv->platform_device->dev.kobj,
497 &ideapad_attribute_group);
503 platform_device_del(priv->platform_device);
504 fail_platform_device:
505 platform_device_put(priv->platform_device);
509 static void ideapad_platform_exit(struct ideapad_private *priv)
511 sysfs_remove_group(&priv->platform_device->dev.kobj,
512 &ideapad_attribute_group);
513 platform_device_unregister(priv->platform_device);
519 static const struct key_entry ideapad_keymap[] = {
520 { KE_KEY, 6, { KEY_SWITCHVIDEOMODE } },
521 { KE_KEY, 13, { KEY_WLAN } },
522 { KE_KEY, 16, { KEY_PROG1 } },
523 { KE_KEY, 17, { KEY_PROG2 } },
527 static int __devinit ideapad_input_init(struct ideapad_private *priv)
529 struct input_dev *inputdev;
532 inputdev = input_allocate_device();
534 pr_info("Unable to allocate input device\n");
538 inputdev->name = "Ideapad extra buttons";
539 inputdev->phys = "ideapad/input0";
540 inputdev->id.bustype = BUS_HOST;
541 inputdev->dev.parent = &priv->platform_device->dev;
543 error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
545 pr_err("Unable to setup input device keymap\n");
549 error = input_register_device(inputdev);
551 pr_err("Unable to register input device\n");
552 goto err_free_keymap;
555 priv->inputdev = inputdev;
559 sparse_keymap_free(inputdev);
561 input_free_device(inputdev);
565 static void ideapad_input_exit(struct ideapad_private *priv)
567 sparse_keymap_free(priv->inputdev);
568 input_unregister_device(priv->inputdev);
569 priv->inputdev = NULL;
572 static void ideapad_input_report(struct ideapad_private *priv,
573 unsigned long scancode)
575 sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
578 static void ideapad_input_novokey(struct ideapad_private *priv)
580 unsigned long long_pressed;
582 if (read_ec_data(ideapad_handle, VPCCMD_R_NOVO, &long_pressed))
585 ideapad_input_report(priv, 17);
587 ideapad_input_report(priv, 16);
593 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
597 if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
602 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
604 if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL,
605 blightdev->props.brightness))
607 if (write_ec_cmd(ideapad_handle, VPCCMD_W_BL_POWER,
608 blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
614 static const struct backlight_ops ideapad_backlight_ops = {
615 .get_brightness = ideapad_backlight_get_brightness,
616 .update_status = ideapad_backlight_update_status,
619 static int ideapad_backlight_init(struct ideapad_private *priv)
621 struct backlight_device *blightdev;
622 struct backlight_properties props;
623 unsigned long max, now, power;
625 if (read_ec_data(ideapad_handle, VPCCMD_R_BL_MAX, &max))
627 if (read_ec_data(ideapad_handle, VPCCMD_R_BL, &now))
629 if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
632 memset(&props, 0, sizeof(struct backlight_properties));
633 props.max_brightness = max;
634 props.type = BACKLIGHT_PLATFORM;
635 blightdev = backlight_device_register("ideapad",
636 &priv->platform_device->dev,
638 &ideapad_backlight_ops,
640 if (IS_ERR(blightdev)) {
641 pr_err("Could not register backlight device\n");
642 return PTR_ERR(blightdev);
645 priv->blightdev = blightdev;
646 blightdev->props.brightness = now;
647 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
648 backlight_update_status(blightdev);
653 static void ideapad_backlight_exit(struct ideapad_private *priv)
656 backlight_device_unregister(priv->blightdev);
657 priv->blightdev = NULL;
660 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
663 struct backlight_device *blightdev = priv->blightdev;
667 if (read_ec_data(ideapad_handle, VPCCMD_R_BL_POWER, &power))
669 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
672 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
676 /* if we control brightness via acpi video driver */
677 if (priv->blightdev == NULL) {
678 read_ec_data(ideapad_handle, VPCCMD_R_BL, &now);
682 backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
688 static const struct acpi_device_id ideapad_device_ids[] = {
692 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
694 static int __devinit ideapad_acpi_add(struct acpi_device *adevice)
698 struct ideapad_private *priv;
700 if (read_method_int(adevice->handle, "_CFG", &cfg))
703 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
706 dev_set_drvdata(&adevice->dev, priv);
708 ideapad_handle = adevice->handle;
711 ret = ideapad_platform_init(priv);
713 goto platform_failed;
715 ret = ideapad_debugfs_init(priv);
719 ret = ideapad_input_init(priv);
723 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++) {
724 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
725 ideapad_register_rfkill(adevice, i);
729 ideapad_sync_rfk_state(priv);
731 if (!acpi_video_backlight_support()) {
732 ret = ideapad_backlight_init(priv);
733 if (ret && ret != -ENODEV)
734 goto backlight_failed;
740 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
741 ideapad_unregister_rfkill(adevice, i);
742 ideapad_input_exit(priv);
744 ideapad_debugfs_exit(priv);
746 ideapad_platform_exit(priv);
752 static int __devexit ideapad_acpi_remove(struct acpi_device *adevice, int type)
754 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
757 ideapad_backlight_exit(priv);
758 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
759 ideapad_unregister_rfkill(adevice, i);
760 ideapad_input_exit(priv);
761 ideapad_debugfs_exit(priv);
762 ideapad_platform_exit(priv);
763 dev_set_drvdata(&adevice->dev, NULL);
769 static void ideapad_acpi_notify(struct acpi_device *adevice, u32 event)
771 struct ideapad_private *priv = dev_get_drvdata(&adevice->dev);
772 acpi_handle handle = adevice->handle;
773 unsigned long vpc1, vpc2, vpc_bit;
775 if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
777 if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
780 vpc1 = (vpc2 << 8) | vpc1;
781 for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
782 if (test_bit(vpc_bit, &vpc1)) {
785 ideapad_sync_rfk_state(priv);
789 ideapad_input_report(priv, vpc_bit);
792 ideapad_backlight_notify_brightness(priv);
795 ideapad_input_novokey(priv);
798 ideapad_backlight_notify_power(priv);
801 pr_info("Unknown event: %lu\n", vpc_bit);
807 static struct acpi_driver ideapad_acpi_driver = {
808 .name = "ideapad_acpi",
810 .ids = ideapad_device_ids,
811 .ops.add = ideapad_acpi_add,
812 .ops.remove = ideapad_acpi_remove,
813 .ops.notify = ideapad_acpi_notify,
814 .owner = THIS_MODULE,
817 static int __init ideapad_acpi_module_init(void)
819 return acpi_bus_register_driver(&ideapad_acpi_driver);
822 static void __exit ideapad_acpi_module_exit(void)
824 acpi_bus_unregister_driver(&ideapad_acpi_driver);
827 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
828 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
829 MODULE_LICENSE("GPL");
831 module_init(ideapad_acpi_module_init);
832 module_exit(ideapad_acpi_module_exit);