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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 | ||
dd3c7f23 | 23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
d12d8baf | 24 | |
d12d8baf | 25 | #include <linux/kernel.h> |
d12d8baf | 26 | #include <linux/input.h> |
c30116c6 | 27 | #include <linux/input/sparse-keymap.h> |
d12d8baf | 28 | #include <linux/acpi.h> |
d12d8baf | 29 | #include <linux/backlight.h> |
5a0e3ad6 | 30 | #include <linux/slab.h> |
d12d8baf TR |
31 | |
32 | MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>"); | |
33 | MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver"); | |
34 | MODULE_LICENSE("GPL"); | |
35 | ||
d12d8baf TR |
36 | MODULE_ALIAS("wmi:551A1F84-FBDD-4125-91DB-3EA8F44F1D45"); |
37 | MODULE_ALIAS("wmi:B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"); | |
38 | ||
d12d8baf | 39 | #define DRV_NAME "msi-wmi" |
d12d8baf TR |
40 | |
41 | #define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45" | |
42 | #define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2" | |
43 | ||
a80e1cd7 AA |
44 | #define SCANCODE_BASE 0xD0 |
45 | #define MSI_WMI_BRIGHTNESSUP SCANCODE_BASE | |
46 | #define MSI_WMI_BRIGHTNESSDOWN (SCANCODE_BASE + 1) | |
47 | #define MSI_WMI_VOLUMEUP (SCANCODE_BASE + 2) | |
48 | #define MSI_WMI_VOLUMEDOWN (SCANCODE_BASE + 3) | |
49 | #define MSI_WMI_MUTE (SCANCODE_BASE + 4) | |
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} }, | |
92f61cbc | 55 | { KE_KEY, MSI_WMI_MUTE, {KEY_MUTE} }, |
d12d8baf TR |
56 | { KE_END, 0} |
57 | }; | |
c30116c6 | 58 | static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1]; |
d12d8baf | 59 | |
8700e161 | 60 | static struct backlight_device *backlight; |
d12d8baf TR |
61 | |
62 | static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF }; | |
63 | ||
64 | static struct input_dev *msi_wmi_input_dev; | |
65 | ||
66 | static int msi_wmi_query_block(int instance, int *ret) | |
67 | { | |
68 | acpi_status status; | |
69 | union acpi_object *obj; | |
70 | ||
71 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
72 | ||
73 | status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output); | |
74 | ||
75 | obj = output.pointer; | |
76 | ||
77 | if (!obj || obj->type != ACPI_TYPE_INTEGER) { | |
78 | if (obj) { | |
dd3c7f23 | 79 | pr_err("query block returned object " |
d12d8baf TR |
80 | "type: %d - buffer length:%d\n", obj->type, |
81 | obj->type == ACPI_TYPE_BUFFER ? | |
82 | obj->buffer.length : 0); | |
83 | } | |
84 | kfree(obj); | |
85 | return -EINVAL; | |
86 | } | |
87 | *ret = obj->integer.value; | |
88 | kfree(obj); | |
89 | return 0; | |
90 | } | |
91 | ||
92 | static int msi_wmi_set_block(int instance, int value) | |
93 | { | |
94 | acpi_status status; | |
95 | ||
96 | struct acpi_buffer input = { sizeof(int), &value }; | |
97 | ||
dd3c7f23 JP |
98 | pr_debug("Going to set block of instance: %d - value: %d\n", |
99 | instance, value); | |
d12d8baf TR |
100 | |
101 | status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input); | |
102 | ||
103 | return ACPI_SUCCESS(status) ? 0 : 1; | |
104 | } | |
105 | ||
106 | static int bl_get(struct backlight_device *bd) | |
107 | { | |
de078e57 | 108 | int level, err, ret; |
d12d8baf TR |
109 | |
110 | /* Instance 1 is "get backlight", cmp with DSDT */ | |
111 | err = msi_wmi_query_block(1, &ret); | |
de078e57 | 112 | if (err) { |
dd3c7f23 | 113 | pr_err("Could not query backlight: %d\n", err); |
de078e57 AA |
114 | return -EINVAL; |
115 | } | |
dd3c7f23 | 116 | pr_debug("Get: Query block returned: %d\n", ret); |
d12d8baf TR |
117 | for (level = 0; level < ARRAY_SIZE(backlight_map); level++) { |
118 | if (backlight_map[level] == ret) { | |
dd3c7f23 JP |
119 | pr_debug("Current backlight level: 0x%X - index: %d\n", |
120 | backlight_map[level], level); | |
d12d8baf TR |
121 | break; |
122 | } | |
123 | } | |
124 | if (level == ARRAY_SIZE(backlight_map)) { | |
dd3c7f23 | 125 | pr_err("get: Invalid brightness value: 0x%X\n", ret); |
d12d8baf TR |
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 | ||
28d85873 | 141 | static const struct backlight_ops msi_backlight_ops = { |
d12d8baf TR |
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) { | |
dd3c7f23 | 156 | pr_info("bad event status 0x%x\n", status); |
fda11e61 LB |
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; | |
dd3c7f23 | 164 | pr_debug("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 | 170 | diff = ktime_sub(cur, last_pressed[key->code - |
a80e1cd7 | 171 | SCANCODE_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) { |
dd3c7f23 JP |
175 | pr_debug("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 | } | |
a80e1cd7 | 180 | last_pressed[key->code - SCANCODE_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))) { | |
dd3c7f23 JP |
187 | pr_debug("Send key: 0x%X - " |
188 | "Input layer keycode: %d\n", | |
189 | key->code, key->keycode); | |
c30116c6 AA |
190 | sparse_keymap_report_entry(msi_wmi_input_dev, |
191 | key, 1, true); | |
d12d8baf TR |
192 | } |
193 | } else | |
dd3c7f23 | 194 | pr_info("Unknown key pressed - %x\n", eventcode); |
d12d8baf | 195 | } else |
dd3c7f23 | 196 | pr_info("Unknown event received\n"); |
d12d8baf TR |
197 | kfree(response.pointer); |
198 | } | |
199 | ||
200 | static int __init msi_wmi_input_setup(void) | |
201 | { | |
d12d8baf TR |
202 | int err; |
203 | ||
204 | msi_wmi_input_dev = input_allocate_device(); | |
46b51eb9 AA |
205 | if (!msi_wmi_input_dev) |
206 | return -ENOMEM; | |
d12d8baf TR |
207 | |
208 | msi_wmi_input_dev->name = "MSI WMI hotkeys"; | |
209 | msi_wmi_input_dev->phys = "wmi/input0"; | |
210 | msi_wmi_input_dev->id.bustype = BUS_HOST; | |
c30116c6 AA |
211 | |
212 | err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL); | |
213 | if (err) | |
214 | goto err_free_dev; | |
d12d8baf TR |
215 | |
216 | err = input_register_device(msi_wmi_input_dev); | |
217 | ||
c30116c6 AA |
218 | if (err) |
219 | goto err_free_keymap; | |
220 | ||
221 | memset(last_pressed, 0, sizeof(last_pressed)); | |
d12d8baf TR |
222 | |
223 | return 0; | |
c30116c6 AA |
224 | |
225 | err_free_keymap: | |
226 | sparse_keymap_free(msi_wmi_input_dev); | |
227 | err_free_dev: | |
228 | input_free_device(msi_wmi_input_dev); | |
229 | return err; | |
d12d8baf TR |
230 | } |
231 | ||
232 | static int __init msi_wmi_init(void) | |
233 | { | |
234 | int err; | |
235 | ||
46b51eb9 | 236 | if (!wmi_has_guid(MSIWMI_EVENT_GUID)) { |
dd3c7f23 | 237 | pr_err("This machine doesn't have MSI-hotkeys through WMI\n"); |
46b51eb9 AA |
238 | return -ENODEV; |
239 | } | |
240 | err = wmi_install_notify_handler(MSIWMI_EVENT_GUID, | |
241 | msi_wmi_notify, NULL); | |
f2772575 | 242 | if (ACPI_FAILURE(err)) |
46b51eb9 | 243 | return -EINVAL; |
d12d8baf | 244 | |
46b51eb9 AA |
245 | err = msi_wmi_input_setup(); |
246 | if (err) | |
247 | goto err_uninstall_notifier; | |
d12d8baf | 248 | |
46b51eb9 | 249 | if (!acpi_video_backlight_support()) { |
a19a6ee6 MG |
250 | struct backlight_properties props; |
251 | memset(&props, 0, sizeof(struct backlight_properties)); | |
bb7ca747 | 252 | props.type = BACKLIGHT_PLATFORM; |
a19a6ee6 MG |
253 | props.max_brightness = ARRAY_SIZE(backlight_map) - 1; |
254 | backlight = backlight_device_register(DRV_NAME, NULL, NULL, | |
255 | &msi_backlight_ops, | |
256 | &props); | |
28d85873 BP |
257 | if (IS_ERR(backlight)) { |
258 | err = PTR_ERR(backlight); | |
46b51eb9 | 259 | goto err_free_input; |
28d85873 | 260 | } |
46b51eb9 | 261 | |
46b51eb9 AA |
262 | err = bl_get(NULL); |
263 | if (err < 0) | |
264 | goto err_free_backlight; | |
265 | ||
266 | backlight->props.brightness = err; | |
d12d8baf | 267 | } |
dd3c7f23 | 268 | pr_debug("Event handler installed\n"); |
46b51eb9 | 269 | |
d12d8baf | 270 | return 0; |
46b51eb9 AA |
271 | |
272 | err_free_backlight: | |
273 | backlight_device_unregister(backlight); | |
274 | err_free_input: | |
94ee48b9 | 275 | sparse_keymap_free(msi_wmi_input_dev); |
46b51eb9 AA |
276 | input_unregister_device(msi_wmi_input_dev); |
277 | err_uninstall_notifier: | |
278 | wmi_remove_notify_handler(MSIWMI_EVENT_GUID); | |
279 | return err; | |
d12d8baf TR |
280 | } |
281 | ||
282 | static void __exit msi_wmi_exit(void) | |
283 | { | |
284 | if (wmi_has_guid(MSIWMI_EVENT_GUID)) { | |
285 | wmi_remove_notify_handler(MSIWMI_EVENT_GUID); | |
c30116c6 | 286 | sparse_keymap_free(msi_wmi_input_dev); |
d12d8baf TR |
287 | input_unregister_device(msi_wmi_input_dev); |
288 | backlight_device_unregister(backlight); | |
289 | } | |
290 | } | |
291 | ||
292 | module_init(msi_wmi_init); | |
293 | module_exit(msi_wmi_exit); |