Commit | Line | Data |
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d12d8baf TR |
1 | /* |
2 | * MSI WMI hotkeys | |
3 | * | |
4 | * Copyright (C) 2009 Novell <trenn@suse.de> | |
5 | * | |
6 | * Most stuff taken over from hp-wmi | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | */ | |
22 | ||
23 | ||
d12d8baf | 24 | #include <linux/kernel.h> |
d12d8baf | 25 | #include <linux/input.h> |
c30116c6 | 26 | #include <linux/input/sparse-keymap.h> |
d12d8baf | 27 | #include <linux/acpi.h> |
d12d8baf TR |
28 | #include <linux/backlight.h> |
29 | ||
30 | MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>"); | |
31 | MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | ||
d12d8baf TR |
34 | MODULE_ALIAS("wmi:551A1F84-FBDD-4125-91DB-3EA8F44F1D45"); |
35 | MODULE_ALIAS("wmi:B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"); | |
36 | ||
d12d8baf TR |
37 | #define DRV_NAME "msi-wmi" |
38 | #define DRV_PFX DRV_NAME ": " | |
39 | ||
40 | #define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45" | |
41 | #define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2" | |
42 | ||
822ddc04 | 43 | #define dprintk(msg...) pr_debug(DRV_PFX msg) |
d12d8baf | 44 | |
c30116c6 | 45 | #define KEYCODE_BASE 0xD0 |
de078e57 AA |
46 | #define MSI_WMI_BRIGHTNESSUP KEYCODE_BASE |
47 | #define MSI_WMI_BRIGHTNESSDOWN (KEYCODE_BASE + 1) | |
48 | #define MSI_WMI_VOLUMEUP (KEYCODE_BASE + 2) | |
49 | #define MSI_WMI_VOLUMEDOWN (KEYCODE_BASE + 3) | |
d12d8baf | 50 | static struct key_entry msi_wmi_keymap[] = { |
de078e57 AA |
51 | { KE_KEY, MSI_WMI_BRIGHTNESSUP, {KEY_BRIGHTNESSUP} }, |
52 | { KE_KEY, MSI_WMI_BRIGHTNESSDOWN, {KEY_BRIGHTNESSDOWN} }, | |
53 | { KE_KEY, MSI_WMI_VOLUMEUP, {KEY_VOLUMEUP} }, | |
54 | { KE_KEY, MSI_WMI_VOLUMEDOWN, {KEY_VOLUMEDOWN} }, | |
d12d8baf TR |
55 | { KE_END, 0} |
56 | }; | |
c30116c6 | 57 | static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1]; |
d12d8baf TR |
58 | |
59 | struct backlight_device *backlight; | |
60 | ||
61 | static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF }; | |
62 | ||
63 | static struct input_dev *msi_wmi_input_dev; | |
64 | ||
65 | static int msi_wmi_query_block(int instance, int *ret) | |
66 | { | |
67 | acpi_status status; | |
68 | union acpi_object *obj; | |
69 | ||
70 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
71 | ||
72 | status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output); | |
73 | ||
74 | obj = output.pointer; | |
75 | ||
76 | if (!obj || obj->type != ACPI_TYPE_INTEGER) { | |
77 | if (obj) { | |
78 | printk(KERN_ERR DRV_PFX "query block returned object " | |
79 | "type: %d - buffer length:%d\n", obj->type, | |
80 | obj->type == ACPI_TYPE_BUFFER ? | |
81 | obj->buffer.length : 0); | |
82 | } | |
83 | kfree(obj); | |
84 | return -EINVAL; | |
85 | } | |
86 | *ret = obj->integer.value; | |
87 | kfree(obj); | |
88 | return 0; | |
89 | } | |
90 | ||
91 | static int msi_wmi_set_block(int instance, int value) | |
92 | { | |
93 | acpi_status status; | |
94 | ||
95 | struct acpi_buffer input = { sizeof(int), &value }; | |
96 | ||
97 | dprintk("Going to set block of instance: %d - value: %d\n", | |
98 | instance, value); | |
99 | ||
100 | status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input); | |
101 | ||
102 | return ACPI_SUCCESS(status) ? 0 : 1; | |
103 | } | |
104 | ||
105 | static int bl_get(struct backlight_device *bd) | |
106 | { | |
de078e57 | 107 | int level, err, ret; |
d12d8baf TR |
108 | |
109 | /* Instance 1 is "get backlight", cmp with DSDT */ | |
110 | err = msi_wmi_query_block(1, &ret); | |
de078e57 | 111 | if (err) { |
d12d8baf | 112 | printk(KERN_ERR DRV_PFX "Could not query backlight: %d\n", err); |
de078e57 AA |
113 | return -EINVAL; |
114 | } | |
d12d8baf TR |
115 | dprintk("Get: Query block returned: %d\n", ret); |
116 | for (level = 0; level < ARRAY_SIZE(backlight_map); level++) { | |
117 | if (backlight_map[level] == ret) { | |
118 | dprintk("Current backlight level: 0x%X - index: %d\n", | |
119 | backlight_map[level], level); | |
120 | break; | |
121 | } | |
122 | } | |
123 | if (level == ARRAY_SIZE(backlight_map)) { | |
124 | printk(KERN_ERR DRV_PFX "get: Invalid brightness value: 0x%X\n", | |
125 | ret); | |
126 | return -EINVAL; | |
127 | } | |
128 | return level; | |
129 | } | |
130 | ||
131 | static int bl_set_status(struct backlight_device *bd) | |
132 | { | |
133 | int bright = bd->props.brightness; | |
134 | if (bright >= ARRAY_SIZE(backlight_map) || bright < 0) | |
135 | return -EINVAL; | |
136 | ||
137 | /* Instance 0 is "set backlight" */ | |
138 | return msi_wmi_set_block(0, backlight_map[bright]); | |
139 | } | |
140 | ||
141 | static struct backlight_ops msi_backlight_ops = { | |
142 | .get_brightness = bl_get, | |
143 | .update_status = bl_set_status, | |
144 | }; | |
145 | ||
d12d8baf TR |
146 | static void msi_wmi_notify(u32 value, void *context) |
147 | { | |
148 | struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; | |
149 | static struct key_entry *key; | |
150 | union acpi_object *obj; | |
151 | ktime_t cur; | |
fda11e61 | 152 | acpi_status status; |
d12d8baf | 153 | |
fda11e61 LB |
154 | status = wmi_get_event_data(value, &response); |
155 | if (status != AE_OK) { | |
156 | printk(KERN_INFO DRV_PFX "bad event status 0x%x\n", status); | |
157 | return; | |
158 | } | |
d12d8baf TR |
159 | |
160 | obj = (union acpi_object *)response.pointer; | |
161 | ||
162 | if (obj && obj->type == ACPI_TYPE_INTEGER) { | |
163 | int eventcode = obj->integer.value; | |
164 | dprintk("Eventcode: 0x%x\n", eventcode); | |
c30116c6 AA |
165 | key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev, |
166 | eventcode); | |
d12d8baf | 167 | if (key) { |
c30116c6 | 168 | ktime_t diff; |
d12d8baf | 169 | cur = ktime_get_real(); |
c30116c6 AA |
170 | diff = ktime_sub(cur, last_pressed[key->code - |
171 | KEYCODE_BASE]); | |
d12d8baf TR |
172 | /* Ignore event if the same event happened in a 50 ms |
173 | timeframe -> Key press may result in 10-20 GPEs */ | |
c30116c6 | 174 | if (ktime_to_us(diff) < 1000 * 50) { |
d12d8baf TR |
175 | dprintk("Suppressed key event 0x%X - " |
176 | "Last press was %lld us ago\n", | |
c30116c6 | 177 | key->code, ktime_to_us(diff)); |
d12d8baf TR |
178 | return; |
179 | } | |
c30116c6 | 180 | last_pressed[key->code - KEYCODE_BASE] = cur; |
d12d8baf | 181 | |
d607af93 AA |
182 | if (key->type == KE_KEY && |
183 | /* Brightness is served via acpi video driver */ | |
de078e57 AA |
184 | (!acpi_video_backlight_support() || |
185 | (key->code != MSI_WMI_BRIGHTNESSUP && | |
186 | key->code != MSI_WMI_BRIGHTNESSDOWN))) { | |
d12d8baf TR |
187 | dprintk("Send key: 0x%X - " |
188 | "Input layer keycode: %d\n", key->code, | |
189 | key->keycode); | |
c30116c6 AA |
190 | sparse_keymap_report_entry(msi_wmi_input_dev, |
191 | key, 1, true); | |
d12d8baf TR |
192 | } |
193 | } else | |
194 | printk(KERN_INFO "Unknown key pressed - %x\n", | |
195 | eventcode); | |
196 | } else | |
197 | printk(KERN_INFO DRV_PFX "Unknown event received\n"); | |
198 | kfree(response.pointer); | |
199 | } | |
200 | ||
201 | static int __init msi_wmi_input_setup(void) | |
202 | { | |
d12d8baf TR |
203 | int err; |
204 | ||
205 | msi_wmi_input_dev = input_allocate_device(); | |
46b51eb9 AA |
206 | if (!msi_wmi_input_dev) |
207 | return -ENOMEM; | |
d12d8baf TR |
208 | |
209 | msi_wmi_input_dev->name = "MSI WMI hotkeys"; | |
210 | msi_wmi_input_dev->phys = "wmi/input0"; | |
211 | msi_wmi_input_dev->id.bustype = BUS_HOST; | |
c30116c6 AA |
212 | |
213 | err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL); | |
214 | if (err) | |
215 | goto err_free_dev; | |
d12d8baf TR |
216 | |
217 | err = input_register_device(msi_wmi_input_dev); | |
218 | ||
c30116c6 AA |
219 | if (err) |
220 | goto err_free_keymap; | |
221 | ||
222 | memset(last_pressed, 0, sizeof(last_pressed)); | |
d12d8baf TR |
223 | |
224 | return 0; | |
c30116c6 AA |
225 | |
226 | err_free_keymap: | |
227 | sparse_keymap_free(msi_wmi_input_dev); | |
228 | err_free_dev: | |
229 | input_free_device(msi_wmi_input_dev); | |
230 | return err; | |
d12d8baf TR |
231 | } |
232 | ||
233 | static int __init msi_wmi_init(void) | |
234 | { | |
235 | int err; | |
236 | ||
46b51eb9 AA |
237 | if (!wmi_has_guid(MSIWMI_EVENT_GUID)) { |
238 | printk(KERN_ERR | |
239 | "This machine doesn't have MSI-hotkeys through WMI\n"); | |
240 | return -ENODEV; | |
241 | } | |
242 | err = wmi_install_notify_handler(MSIWMI_EVENT_GUID, | |
243 | msi_wmi_notify, NULL); | |
f2772575 | 244 | if (ACPI_FAILURE(err)) |
46b51eb9 | 245 | return -EINVAL; |
d12d8baf | 246 | |
46b51eb9 AA |
247 | err = msi_wmi_input_setup(); |
248 | if (err) | |
249 | goto err_uninstall_notifier; | |
d12d8baf | 250 | |
46b51eb9 AA |
251 | if (!acpi_video_backlight_support()) { |
252 | backlight = backlight_device_register(DRV_NAME, | |
253 | NULL, NULL, &msi_backlight_ops); | |
254 | if (IS_ERR(backlight)) | |
255 | goto err_free_input; | |
256 | ||
257 | backlight->props.max_brightness = ARRAY_SIZE(backlight_map) - 1; | |
258 | err = bl_get(NULL); | |
259 | if (err < 0) | |
260 | goto err_free_backlight; | |
261 | ||
262 | backlight->props.brightness = err; | |
d12d8baf | 263 | } |
822ddc04 | 264 | dprintk("Event handler installed\n"); |
46b51eb9 | 265 | |
d12d8baf | 266 | return 0; |
46b51eb9 AA |
267 | |
268 | err_free_backlight: | |
269 | backlight_device_unregister(backlight); | |
270 | err_free_input: | |
271 | input_unregister_device(msi_wmi_input_dev); | |
272 | err_uninstall_notifier: | |
273 | wmi_remove_notify_handler(MSIWMI_EVENT_GUID); | |
274 | return err; | |
d12d8baf TR |
275 | } |
276 | ||
277 | static void __exit msi_wmi_exit(void) | |
278 | { | |
279 | if (wmi_has_guid(MSIWMI_EVENT_GUID)) { | |
280 | wmi_remove_notify_handler(MSIWMI_EVENT_GUID); | |
c30116c6 | 281 | sparse_keymap_free(msi_wmi_input_dev); |
d12d8baf TR |
282 | input_unregister_device(msi_wmi_input_dev); |
283 | backlight_device_unregister(backlight); | |
284 | } | |
285 | } | |
286 | ||
287 | module_init(msi_wmi_init); | |
288 | module_exit(msi_wmi_exit); |