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Thomas Renningerd12d8ba2009-12-10 14:18:13 +01001/*
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
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010024#include <linux/kernel.h>
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010025#include <linux/input.h>
Anisse Astierc30116c2009-12-10 14:18:19 +010026#include <linux/input/sparse-keymap.h>
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010027#include <linux/acpi.h>
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010028#include <linux/backlight.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/slab.h>
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010030
31MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
32MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
33MODULE_LICENSE("GPL");
34
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010035MODULE_ALIAS("wmi:551A1F84-FBDD-4125-91DB-3EA8F44F1D45");
36MODULE_ALIAS("wmi:B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2");
37
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010038#define DRV_NAME "msi-wmi"
39#define DRV_PFX DRV_NAME ": "
40
41#define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45"
42#define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"
43
Anisse Astier822ddc02009-12-10 14:18:16 +010044#define dprintk(msg...) pr_debug(DRV_PFX msg)
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010045
Anisse Astierc30116c2009-12-10 14:18:19 +010046#define KEYCODE_BASE 0xD0
Anisse Astierde078e52009-12-14 10:21:39 +010047#define MSI_WMI_BRIGHTNESSUP KEYCODE_BASE
48#define MSI_WMI_BRIGHTNESSDOWN (KEYCODE_BASE + 1)
49#define MSI_WMI_VOLUMEUP (KEYCODE_BASE + 2)
50#define MSI_WMI_VOLUMEDOWN (KEYCODE_BASE + 3)
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010051static struct key_entry msi_wmi_keymap[] = {
Anisse Astierde078e52009-12-14 10:21:39 +010052 { 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} },
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010056 { KE_END, 0}
57};
Anisse Astierc30116c2009-12-10 14:18:19 +010058static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1];
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010059
Axel Lin8700e162010-07-08 09:50:30 +080060static struct backlight_device *backlight;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +010061
62static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF };
63
64static struct input_dev *msi_wmi_input_dev;
65
66static 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) {
79 printk(KERN_ERR DRV_PFX "query block returned object "
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
92static int msi_wmi_set_block(int instance, int value)
93{
94 acpi_status status;
95
96 struct acpi_buffer input = { sizeof(int), &value };
97
98 dprintk("Going to set block of instance: %d - value: %d\n",
99 instance, value);
100
101 status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input);
102
103 return ACPI_SUCCESS(status) ? 0 : 1;
104}
105
106static int bl_get(struct backlight_device *bd)
107{
Anisse Astierde078e52009-12-14 10:21:39 +0100108 int level, err, ret;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100109
110 /* Instance 1 is "get backlight", cmp with DSDT */
111 err = msi_wmi_query_block(1, &ret);
Anisse Astierde078e52009-12-14 10:21:39 +0100112 if (err) {
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100113 printk(KERN_ERR DRV_PFX "Could not query backlight: %d\n", err);
Anisse Astierde078e52009-12-14 10:21:39 +0100114 return -EINVAL;
115 }
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100116 dprintk("Get: Query block returned: %d\n", ret);
117 for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
118 if (backlight_map[level] == ret) {
119 dprintk("Current backlight level: 0x%X - index: %d\n",
120 backlight_map[level], level);
121 break;
122 }
123 }
124 if (level == ARRAY_SIZE(backlight_map)) {
125 printk(KERN_ERR DRV_PFX "get: Invalid brightness value: 0x%X\n",
126 ret);
127 return -EINVAL;
128 }
129 return level;
130}
131
132static 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
Bruno Prémont28d85872010-02-26 13:17:16 +0100142static const struct backlight_ops msi_backlight_ops = {
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100143 .get_brightness = bl_get,
144 .update_status = bl_set_status,
145};
146
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100147static 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;
Len Brownfda11e62009-12-26 23:02:24 -0500153 acpi_status status;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100154
Len Brownfda11e62009-12-26 23:02:24 -0500155 status = wmi_get_event_data(value, &response);
156 if (status != AE_OK) {
157 printk(KERN_INFO DRV_PFX "bad event status 0x%x\n", status);
158 return;
159 }
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100160
161 obj = (union acpi_object *)response.pointer;
162
163 if (obj && obj->type == ACPI_TYPE_INTEGER) {
164 int eventcode = obj->integer.value;
165 dprintk("Eventcode: 0x%x\n", eventcode);
Anisse Astierc30116c2009-12-10 14:18:19 +0100166 key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev,
167 eventcode);
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100168 if (key) {
Anisse Astierc30116c2009-12-10 14:18:19 +0100169 ktime_t diff;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100170 cur = ktime_get_real();
Anisse Astierc30116c2009-12-10 14:18:19 +0100171 diff = ktime_sub(cur, last_pressed[key->code -
172 KEYCODE_BASE]);
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100173 /* Ignore event if the same event happened in a 50 ms
174 timeframe -> Key press may result in 10-20 GPEs */
Anisse Astierc30116c2009-12-10 14:18:19 +0100175 if (ktime_to_us(diff) < 1000 * 50) {
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100176 dprintk("Suppressed key event 0x%X - "
177 "Last press was %lld us ago\n",
Anisse Astierc30116c2009-12-10 14:18:19 +0100178 key->code, ktime_to_us(diff));
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100179 return;
180 }
Anisse Astierc30116c2009-12-10 14:18:19 +0100181 last_pressed[key->code - KEYCODE_BASE] = cur;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100182
Anisse Astierd607af92009-12-10 14:18:18 +0100183 if (key->type == KE_KEY &&
184 /* Brightness is served via acpi video driver */
Anisse Astierde078e52009-12-14 10:21:39 +0100185 (!acpi_video_backlight_support() ||
186 (key->code != MSI_WMI_BRIGHTNESSUP &&
187 key->code != MSI_WMI_BRIGHTNESSDOWN))) {
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100188 dprintk("Send key: 0x%X - "
189 "Input layer keycode: %d\n", key->code,
190 key->keycode);
Anisse Astierc30116c2009-12-10 14:18:19 +0100191 sparse_keymap_report_entry(msi_wmi_input_dev,
192 key, 1, true);
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100193 }
194 } else
195 printk(KERN_INFO "Unknown key pressed - %x\n",
196 eventcode);
197 } else
198 printk(KERN_INFO DRV_PFX "Unknown event received\n");
199 kfree(response.pointer);
200}
201
202static int __init msi_wmi_input_setup(void)
203{
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100204 int err;
205
206 msi_wmi_input_dev = input_allocate_device();
Anisse Astier46b51eb2009-12-10 14:18:15 +0100207 if (!msi_wmi_input_dev)
208 return -ENOMEM;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100209
210 msi_wmi_input_dev->name = "MSI WMI hotkeys";
211 msi_wmi_input_dev->phys = "wmi/input0";
212 msi_wmi_input_dev->id.bustype = BUS_HOST;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100213
Anisse Astierc30116c2009-12-10 14:18:19 +0100214 err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL);
215 if (err)
216 goto err_free_dev;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100217
218 err = input_register_device(msi_wmi_input_dev);
219
Anisse Astierc30116c2009-12-10 14:18:19 +0100220 if (err)
221 goto err_free_keymap;
222
223 memset(last_pressed, 0, sizeof(last_pressed));
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100224
225 return 0;
Anisse Astierc30116c2009-12-10 14:18:19 +0100226
227err_free_keymap:
228 sparse_keymap_free(msi_wmi_input_dev);
229err_free_dev:
230 input_free_device(msi_wmi_input_dev);
231 return err;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100232}
233
234static int __init msi_wmi_init(void)
235{
236 int err;
237
Anisse Astier46b51eb2009-12-10 14:18:15 +0100238 if (!wmi_has_guid(MSIWMI_EVENT_GUID)) {
239 printk(KERN_ERR
240 "This machine doesn't have MSI-hotkeys through WMI\n");
241 return -ENODEV;
242 }
243 err = wmi_install_notify_handler(MSIWMI_EVENT_GUID,
244 msi_wmi_notify, NULL);
Len Brownf2772572009-12-26 22:04:03 -0500245 if (ACPI_FAILURE(err))
Anisse Astier46b51eb2009-12-10 14:18:15 +0100246 return -EINVAL;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100247
Anisse Astier46b51eb2009-12-10 14:18:15 +0100248 err = msi_wmi_input_setup();
249 if (err)
250 goto err_uninstall_notifier;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100251
Anisse Astier46b51eb2009-12-10 14:18:15 +0100252 if (!acpi_video_backlight_support()) {
Matthew Garretta19a6ee2010-02-17 16:39:44 -0500253 struct backlight_properties props;
254 memset(&props, 0, sizeof(struct backlight_properties));
255 props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
256 backlight = backlight_device_register(DRV_NAME, NULL, NULL,
257 &msi_backlight_ops,
258 &props);
Bruno Prémont28d85872010-02-26 13:17:16 +0100259 if (IS_ERR(backlight)) {
260 err = PTR_ERR(backlight);
Anisse Astier46b51eb2009-12-10 14:18:15 +0100261 goto err_free_input;
Bruno Prémont28d85872010-02-26 13:17:16 +0100262 }
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100263
Anisse Astier46b51eb2009-12-10 14:18:15 +0100264 err = bl_get(NULL);
265 if (err < 0)
266 goto err_free_backlight;
267
268 backlight->props.brightness = err;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100269 }
Anisse Astier822ddc02009-12-10 14:18:16 +0100270 dprintk("Event handler installed\n");
Anisse Astier46b51eb2009-12-10 14:18:15 +0100271
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100272 return 0;
Anisse Astier46b51eb2009-12-10 14:18:15 +0100273
274err_free_backlight:
275 backlight_device_unregister(backlight);
276err_free_input:
277 input_unregister_device(msi_wmi_input_dev);
278err_uninstall_notifier:
279 wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
280 return err;
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100281}
282
283static void __exit msi_wmi_exit(void)
284{
285 if (wmi_has_guid(MSIWMI_EVENT_GUID)) {
286 wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
Anisse Astierc30116c2009-12-10 14:18:19 +0100287 sparse_keymap_free(msi_wmi_input_dev);
Thomas Renningerd12d8ba2009-12-10 14:18:13 +0100288 input_unregister_device(msi_wmi_input_dev);
289 backlight_device_unregister(backlight);
290 }
291}
292
293module_init(msi_wmi_init);
294module_exit(msi_wmi_exit);