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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> |
7c52d551 | 31 | #include <linux/module.h> |
d12d8baf TR |
32 | |
33 | MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>"); | |
34 | MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
d12d8baf TR |
37 | MODULE_ALIAS("wmi:551A1F84-FBDD-4125-91DB-3EA8F44F1D45"); |
38 | MODULE_ALIAS("wmi:B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"); | |
39 | ||
d12d8baf | 40 | #define DRV_NAME "msi-wmi" |
d12d8baf TR |
41 | |
42 | #define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45" | |
43 | #define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2" | |
44 | ||
a80e1cd7 AA |
45 | #define SCANCODE_BASE 0xD0 |
46 | #define MSI_WMI_BRIGHTNESSUP SCANCODE_BASE | |
47 | #define MSI_WMI_BRIGHTNESSDOWN (SCANCODE_BASE + 1) | |
48 | #define MSI_WMI_VOLUMEUP (SCANCODE_BASE + 2) | |
49 | #define MSI_WMI_VOLUMEDOWN (SCANCODE_BASE + 3) | |
50 | #define MSI_WMI_MUTE (SCANCODE_BASE + 4) | |
d12d8baf | 51 | static struct key_entry msi_wmi_keymap[] = { |
de078e57 AA |
52 | { KE_KEY, MSI_WMI_BRIGHTNESSUP, {KEY_BRIGHTNESSUP} }, |
53 | { KE_KEY, MSI_WMI_BRIGHTNESSDOWN, {KEY_BRIGHTNESSDOWN} }, | |
54 | { KE_KEY, MSI_WMI_VOLUMEUP, {KEY_VOLUMEUP} }, | |
55 | { KE_KEY, MSI_WMI_VOLUMEDOWN, {KEY_VOLUMEDOWN} }, | |
92f61cbc | 56 | { KE_KEY, MSI_WMI_MUTE, {KEY_MUTE} }, |
d12d8baf TR |
57 | { KE_END, 0} |
58 | }; | |
c30116c6 | 59 | static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1]; |
d12d8baf | 60 | |
8700e161 | 61 | static struct backlight_device *backlight; |
d12d8baf TR |
62 | |
63 | static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF }; | |
64 | ||
65 | static struct input_dev *msi_wmi_input_dev; | |
66 | ||
67 | static int msi_wmi_query_block(int instance, int *ret) | |
68 | { | |
69 | acpi_status status; | |
70 | union acpi_object *obj; | |
71 | ||
72 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
73 | ||
74 | status = wmi_query_block(MSIWMI_BIOS_GUID, instance, &output); | |
75 | ||
76 | obj = output.pointer; | |
77 | ||
78 | if (!obj || obj->type != ACPI_TYPE_INTEGER) { | |
79 | if (obj) { | |
dd3c7f23 | 80 | pr_err("query block returned object " |
d12d8baf TR |
81 | "type: %d - buffer length:%d\n", obj->type, |
82 | obj->type == ACPI_TYPE_BUFFER ? | |
83 | obj->buffer.length : 0); | |
84 | } | |
85 | kfree(obj); | |
86 | return -EINVAL; | |
87 | } | |
88 | *ret = obj->integer.value; | |
89 | kfree(obj); | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static int msi_wmi_set_block(int instance, int value) | |
94 | { | |
95 | acpi_status status; | |
96 | ||
97 | struct acpi_buffer input = { sizeof(int), &value }; | |
98 | ||
dd3c7f23 JP |
99 | pr_debug("Going to set block of instance: %d - value: %d\n", |
100 | instance, value); | |
d12d8baf TR |
101 | |
102 | status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input); | |
103 | ||
104 | return ACPI_SUCCESS(status) ? 0 : 1; | |
105 | } | |
106 | ||
107 | static int bl_get(struct backlight_device *bd) | |
108 | { | |
de078e57 | 109 | int level, err, ret; |
d12d8baf TR |
110 | |
111 | /* Instance 1 is "get backlight", cmp with DSDT */ | |
112 | err = msi_wmi_query_block(1, &ret); | |
de078e57 | 113 | if (err) { |
dd3c7f23 | 114 | pr_err("Could not query backlight: %d\n", err); |
de078e57 AA |
115 | return -EINVAL; |
116 | } | |
dd3c7f23 | 117 | pr_debug("Get: Query block returned: %d\n", ret); |
d12d8baf TR |
118 | for (level = 0; level < ARRAY_SIZE(backlight_map); level++) { |
119 | if (backlight_map[level] == ret) { | |
dd3c7f23 JP |
120 | pr_debug("Current backlight level: 0x%X - index: %d\n", |
121 | backlight_map[level], level); | |
d12d8baf TR |
122 | break; |
123 | } | |
124 | } | |
125 | if (level == ARRAY_SIZE(backlight_map)) { | |
dd3c7f23 | 126 | pr_err("get: Invalid brightness value: 0x%X\n", ret); |
d12d8baf TR |
127 | return -EINVAL; |
128 | } | |
129 | return level; | |
130 | } | |
131 | ||
132 | static int bl_set_status(struct backlight_device *bd) | |
133 | { | |
134 | int bright = bd->props.brightness; | |
135 | if (bright >= ARRAY_SIZE(backlight_map) || bright < 0) | |
136 | return -EINVAL; | |
137 | ||
138 | /* Instance 0 is "set backlight" */ | |
139 | return msi_wmi_set_block(0, backlight_map[bright]); | |
140 | } | |
141 | ||
28d85873 | 142 | static const struct backlight_ops msi_backlight_ops = { |
d12d8baf TR |
143 | .get_brightness = bl_get, |
144 | .update_status = bl_set_status, | |
145 | }; | |
146 | ||
d12d8baf TR |
147 | static void msi_wmi_notify(u32 value, void *context) |
148 | { | |
149 | struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL }; | |
150 | static struct key_entry *key; | |
151 | union acpi_object *obj; | |
152 | ktime_t cur; | |
fda11e61 | 153 | acpi_status status; |
d12d8baf | 154 | |
fda11e61 LB |
155 | status = wmi_get_event_data(value, &response); |
156 | if (status != AE_OK) { | |
dd3c7f23 | 157 | pr_info("bad event status 0x%x\n", status); |
fda11e61 LB |
158 | return; |
159 | } | |
d12d8baf TR |
160 | |
161 | obj = (union acpi_object *)response.pointer; | |
162 | ||
163 | if (obj && obj->type == ACPI_TYPE_INTEGER) { | |
164 | int eventcode = obj->integer.value; | |
dd3c7f23 | 165 | pr_debug("Eventcode: 0x%x\n", eventcode); |
c30116c6 AA |
166 | key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev, |
167 | eventcode); | |
d12d8baf | 168 | if (key) { |
c30116c6 | 169 | ktime_t diff; |
d12d8baf | 170 | cur = ktime_get_real(); |
c30116c6 | 171 | diff = ktime_sub(cur, last_pressed[key->code - |
a80e1cd7 | 172 | SCANCODE_BASE]); |
d12d8baf TR |
173 | /* Ignore event if the same event happened in a 50 ms |
174 | timeframe -> Key press may result in 10-20 GPEs */ | |
c30116c6 | 175 | if (ktime_to_us(diff) < 1000 * 50) { |
dd3c7f23 JP |
176 | pr_debug("Suppressed key event 0x%X - " |
177 | "Last press was %lld us ago\n", | |
c30116c6 | 178 | key->code, ktime_to_us(diff)); |
51c94491 | 179 | goto msi_wmi_notify_exit; |
d12d8baf | 180 | } |
a80e1cd7 | 181 | last_pressed[key->code - SCANCODE_BASE] = cur; |
d12d8baf | 182 | |
d607af93 AA |
183 | if (key->type == KE_KEY && |
184 | /* Brightness is served via acpi video driver */ | |
de078e57 AA |
185 | (!acpi_video_backlight_support() || |
186 | (key->code != MSI_WMI_BRIGHTNESSUP && | |
187 | key->code != MSI_WMI_BRIGHTNESSDOWN))) { | |
dd3c7f23 JP |
188 | pr_debug("Send key: 0x%X - " |
189 | "Input layer keycode: %d\n", | |
190 | key->code, key->keycode); | |
c30116c6 AA |
191 | sparse_keymap_report_entry(msi_wmi_input_dev, |
192 | key, 1, true); | |
d12d8baf TR |
193 | } |
194 | } else | |
dd3c7f23 | 195 | pr_info("Unknown key pressed - %x\n", eventcode); |
d12d8baf | 196 | } else |
dd3c7f23 | 197 | pr_info("Unknown event received\n"); |
51c94491 MM |
198 | |
199 | msi_wmi_notify_exit: | |
d12d8baf TR |
200 | kfree(response.pointer); |
201 | } | |
202 | ||
203 | static int __init msi_wmi_input_setup(void) | |
204 | { | |
d12d8baf TR |
205 | int err; |
206 | ||
207 | msi_wmi_input_dev = input_allocate_device(); | |
46b51eb9 AA |
208 | if (!msi_wmi_input_dev) |
209 | return -ENOMEM; | |
d12d8baf TR |
210 | |
211 | msi_wmi_input_dev->name = "MSI WMI hotkeys"; | |
212 | msi_wmi_input_dev->phys = "wmi/input0"; | |
213 | msi_wmi_input_dev->id.bustype = BUS_HOST; | |
c30116c6 AA |
214 | |
215 | err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL); | |
216 | if (err) | |
217 | goto err_free_dev; | |
d12d8baf TR |
218 | |
219 | err = input_register_device(msi_wmi_input_dev); | |
220 | ||
c30116c6 AA |
221 | if (err) |
222 | goto err_free_keymap; | |
223 | ||
224 | memset(last_pressed, 0, sizeof(last_pressed)); | |
d12d8baf TR |
225 | |
226 | return 0; | |
c30116c6 AA |
227 | |
228 | err_free_keymap: | |
229 | sparse_keymap_free(msi_wmi_input_dev); | |
230 | err_free_dev: | |
231 | input_free_device(msi_wmi_input_dev); | |
232 | return err; | |
d12d8baf TR |
233 | } |
234 | ||
235 | static int __init msi_wmi_init(void) | |
236 | { | |
237 | int err; | |
238 | ||
46b51eb9 | 239 | if (!wmi_has_guid(MSIWMI_EVENT_GUID)) { |
dd3c7f23 | 240 | pr_err("This machine doesn't have MSI-hotkeys through WMI\n"); |
46b51eb9 AA |
241 | return -ENODEV; |
242 | } | |
243 | err = wmi_install_notify_handler(MSIWMI_EVENT_GUID, | |
244 | msi_wmi_notify, NULL); | |
f2772575 | 245 | if (ACPI_FAILURE(err)) |
46b51eb9 | 246 | return -EINVAL; |
d12d8baf | 247 | |
46b51eb9 AA |
248 | err = msi_wmi_input_setup(); |
249 | if (err) | |
250 | goto err_uninstall_notifier; | |
d12d8baf | 251 | |
46b51eb9 | 252 | if (!acpi_video_backlight_support()) { |
a19a6ee6 MG |
253 | struct backlight_properties props; |
254 | memset(&props, 0, sizeof(struct backlight_properties)); | |
bb7ca747 | 255 | props.type = BACKLIGHT_PLATFORM; |
a19a6ee6 MG |
256 | props.max_brightness = ARRAY_SIZE(backlight_map) - 1; |
257 | backlight = backlight_device_register(DRV_NAME, NULL, NULL, | |
258 | &msi_backlight_ops, | |
259 | &props); | |
28d85873 BP |
260 | if (IS_ERR(backlight)) { |
261 | err = PTR_ERR(backlight); | |
46b51eb9 | 262 | goto err_free_input; |
28d85873 | 263 | } |
46b51eb9 | 264 | |
46b51eb9 AA |
265 | err = bl_get(NULL); |
266 | if (err < 0) | |
267 | goto err_free_backlight; | |
268 | ||
269 | backlight->props.brightness = err; | |
d12d8baf | 270 | } |
dd3c7f23 | 271 | pr_debug("Event handler installed\n"); |
46b51eb9 | 272 | |
d12d8baf | 273 | return 0; |
46b51eb9 AA |
274 | |
275 | err_free_backlight: | |
276 | backlight_device_unregister(backlight); | |
277 | err_free_input: | |
94ee48b9 | 278 | sparse_keymap_free(msi_wmi_input_dev); |
46b51eb9 AA |
279 | input_unregister_device(msi_wmi_input_dev); |
280 | err_uninstall_notifier: | |
281 | wmi_remove_notify_handler(MSIWMI_EVENT_GUID); | |
282 | return err; | |
d12d8baf TR |
283 | } |
284 | ||
285 | static void __exit msi_wmi_exit(void) | |
286 | { | |
287 | if (wmi_has_guid(MSIWMI_EVENT_GUID)) { | |
288 | wmi_remove_notify_handler(MSIWMI_EVENT_GUID); | |
c30116c6 | 289 | sparse_keymap_free(msi_wmi_input_dev); |
d12d8baf TR |
290 | input_unregister_device(msi_wmi_input_dev); |
291 | backlight_device_unregister(backlight); | |
292 | } | |
293 | } | |
294 | ||
295 | module_init(msi_wmi_init); | |
296 | module_exit(msi_wmi_exit); |