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
);