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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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#include <linux/kernel.h>
26#include <linux/input.h>
27#include <linux/input/sparse-keymap.h>
28#include <linux/acpi.h>
29#include <linux/backlight.h>
30#include <linux/slab.h>
31
32MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
33MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
34MODULE_LICENSE("GPL");
35
36MODULE_ALIAS("wmi:551A1F84-FBDD-4125-91DB-3EA8F44F1D45");
37MODULE_ALIAS("wmi:B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2");
38
39#define DRV_NAME "msi-wmi"
40
41#define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45"
42#define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"
43
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)
50static struct key_entry msi_wmi_keymap[] = {
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} },
55 { KE_KEY, MSI_WMI_MUTE, {KEY_MUTE} },
56 { KE_END, 0}
57};
58static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1];
59
60static struct backlight_device *backlight;
61
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 pr_err("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 pr_debug("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{
108 int level, err, ret;
109
110 /* Instance 1 is "get backlight", cmp with DSDT */
111 err = msi_wmi_query_block(1, &ret);
112 if (err) {
113 pr_err("Could not query backlight: %d\n", err);
114 return -EINVAL;
115 }
116 pr_debug("Get: Query block returned: %d\n", ret);
117 for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
118 if (backlight_map[level] == ret) {
119 pr_debug("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 pr_err("get: Invalid brightness value: 0x%X\n", ret);
126 return -EINVAL;
127 }
128 return level;
129}
130
131static 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
141static const struct backlight_ops msi_backlight_ops = {
142 .get_brightness = bl_get,
143 .update_status = bl_set_status,
144};
145
146static 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;
152 acpi_status status;
153
154 status = wmi_get_event_data(value, &response);
155 if (status != AE_OK) {
156 pr_info("bad event status 0x%x\n", status);
157 return;
158 }
159
160 obj = (union acpi_object *)response.pointer;
161
162 if (obj && obj->type == ACPI_TYPE_INTEGER) {
163 int eventcode = obj->integer.value;
164 pr_debug("Eventcode: 0x%x\n", eventcode);
165 key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev,
166 eventcode);
167 if (key) {
168 ktime_t diff;
169 cur = ktime_get_real();
170 diff = ktime_sub(cur, last_pressed[key->code -
171 SCANCODE_BASE]);
172 /* Ignore event if the same event happened in a 50 ms
173 timeframe -> Key press may result in 10-20 GPEs */
174 if (ktime_to_us(diff) < 1000 * 50) {
175 pr_debug("Suppressed key event 0x%X - "
176 "Last press was %lld us ago\n",
177 key->code, ktime_to_us(diff));
178 return;
179 }
180 last_pressed[key->code - SCANCODE_BASE] = cur;
181
182 if (key->type == KE_KEY &&
183 /* Brightness is served via acpi video driver */
184 (!acpi_video_backlight_support() ||
185 (key->code != MSI_WMI_BRIGHTNESSUP &&
186 key->code != MSI_WMI_BRIGHTNESSDOWN))) {
187 pr_debug("Send key: 0x%X - "
188 "Input layer keycode: %d\n",
189 key->code, key->keycode);
190 sparse_keymap_report_entry(msi_wmi_input_dev,
191 key, 1, true);
192 }
193 } else
194 pr_info("Unknown key pressed - %x\n", eventcode);
195 } else
196 pr_info("Unknown event received\n");
197 kfree(response.pointer);
198}
199
200static int __init msi_wmi_input_setup(void)
201{
202 int err;
203
204 msi_wmi_input_dev = input_allocate_device();
205 if (!msi_wmi_input_dev)
206 return -ENOMEM;
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;
211
212 err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL);
213 if (err)
214 goto err_free_dev;
215
216 err = input_register_device(msi_wmi_input_dev);
217
218 if (err)
219 goto err_free_keymap;
220
221 memset(last_pressed, 0, sizeof(last_pressed));
222
223 return 0;
224
225err_free_keymap:
226 sparse_keymap_free(msi_wmi_input_dev);
227err_free_dev:
228 input_free_device(msi_wmi_input_dev);
229 return err;
230}
231
232static int __init msi_wmi_init(void)
233{
234 int err;
235
236 if (!wmi_has_guid(MSIWMI_EVENT_GUID)) {
237 pr_err("This machine doesn't have MSI-hotkeys through WMI\n");
238 return -ENODEV;
239 }
240 err = wmi_install_notify_handler(MSIWMI_EVENT_GUID,
241 msi_wmi_notify, NULL);
242 if (ACPI_FAILURE(err))
243 return -EINVAL;
244
245 err = msi_wmi_input_setup();
246 if (err)
247 goto err_uninstall_notifier;
248
249 if (!acpi_video_backlight_support()) {
250 struct backlight_properties props;
251 memset(&props, 0, sizeof(struct backlight_properties));
252 props.type = BACKLIGHT_PLATFORM;
253 props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
254 backlight = backlight_device_register(DRV_NAME, NULL, NULL,
255 &msi_backlight_ops,
256 &props);
257 if (IS_ERR(backlight)) {
258 err = PTR_ERR(backlight);
259 goto err_free_input;
260 }
261
262 err = bl_get(NULL);
263 if (err < 0)
264 goto err_free_backlight;
265
266 backlight->props.brightness = err;
267 }
268 pr_debug("Event handler installed\n");
269
270 return 0;
271
272err_free_backlight:
273 backlight_device_unregister(backlight);
274err_free_input:
275 sparse_keymap_free(msi_wmi_input_dev);
276 input_unregister_device(msi_wmi_input_dev);
277err_uninstall_notifier:
278 wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
279 return err;
280}
281
282static void __exit msi_wmi_exit(void)
283{
284 if (wmi_has_guid(MSIWMI_EVENT_GUID)) {
285 wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
286 sparse_keymap_free(msi_wmi_input_dev);
287 input_unregister_device(msi_wmi_input_dev);
288 backlight_device_unregister(backlight);
289 }
290}
291
292module_init(msi_wmi_init);
293module_exit(msi_wmi_exit);
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25#include <linux/kernel.h>
26#include <linux/input.h>
27#include <linux/input/sparse-keymap.h>
28#include <linux/acpi.h>
29#include <linux/backlight.h>
30#include <linux/slab.h>
31#include <linux/module.h>
32
33MODULE_AUTHOR("Thomas Renninger <trenn@suse.de>");
34MODULE_DESCRIPTION("MSI laptop WMI hotkeys driver");
35MODULE_LICENSE("GPL");
36
37MODULE_ALIAS("wmi:551A1F84-FBDD-4125-91DB-3EA8F44F1D45");
38MODULE_ALIAS("wmi:B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2");
39
40#define DRV_NAME "msi-wmi"
41
42#define MSIWMI_BIOS_GUID "551A1F84-FBDD-4125-91DB-3EA8F44F1D45"
43#define MSIWMI_EVENT_GUID "B6F3EEF2-3D2F-49DC-9DE3-85BCE18C62F2"
44
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)
51static struct key_entry msi_wmi_keymap[] = {
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} },
56 { KE_KEY, MSI_WMI_MUTE, {KEY_MUTE} },
57 { KE_END, 0}
58};
59static ktime_t last_pressed[ARRAY_SIZE(msi_wmi_keymap) - 1];
60
61static struct backlight_device *backlight;
62
63static int backlight_map[] = { 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF };
64
65static struct input_dev *msi_wmi_input_dev;
66
67static 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) {
80 pr_err("query block returned object "
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
93static int msi_wmi_set_block(int instance, int value)
94{
95 acpi_status status;
96
97 struct acpi_buffer input = { sizeof(int), &value };
98
99 pr_debug("Going to set block of instance: %d - value: %d\n",
100 instance, value);
101
102 status = wmi_set_block(MSIWMI_BIOS_GUID, instance, &input);
103
104 return ACPI_SUCCESS(status) ? 0 : 1;
105}
106
107static int bl_get(struct backlight_device *bd)
108{
109 int level, err, ret;
110
111 /* Instance 1 is "get backlight", cmp with DSDT */
112 err = msi_wmi_query_block(1, &ret);
113 if (err) {
114 pr_err("Could not query backlight: %d\n", err);
115 return -EINVAL;
116 }
117 pr_debug("Get: Query block returned: %d\n", ret);
118 for (level = 0; level < ARRAY_SIZE(backlight_map); level++) {
119 if (backlight_map[level] == ret) {
120 pr_debug("Current backlight level: 0x%X - index: %d\n",
121 backlight_map[level], level);
122 break;
123 }
124 }
125 if (level == ARRAY_SIZE(backlight_map)) {
126 pr_err("get: Invalid brightness value: 0x%X\n", 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
142static const struct backlight_ops msi_backlight_ops = {
143 .get_brightness = bl_get,
144 .update_status = bl_set_status,
145};
146
147static 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;
153 acpi_status status;
154
155 status = wmi_get_event_data(value, &response);
156 if (status != AE_OK) {
157 pr_info("bad event status 0x%x\n", status);
158 return;
159 }
160
161 obj = (union acpi_object *)response.pointer;
162
163 if (obj && obj->type == ACPI_TYPE_INTEGER) {
164 int eventcode = obj->integer.value;
165 pr_debug("Eventcode: 0x%x\n", eventcode);
166 key = sparse_keymap_entry_from_scancode(msi_wmi_input_dev,
167 eventcode);
168 if (key) {
169 ktime_t diff;
170 cur = ktime_get_real();
171 diff = ktime_sub(cur, last_pressed[key->code -
172 SCANCODE_BASE]);
173 /* Ignore event if the same event happened in a 50 ms
174 timeframe -> Key press may result in 10-20 GPEs */
175 if (ktime_to_us(diff) < 1000 * 50) {
176 pr_debug("Suppressed key event 0x%X - "
177 "Last press was %lld us ago\n",
178 key->code, ktime_to_us(diff));
179 return;
180 }
181 last_pressed[key->code - SCANCODE_BASE] = cur;
182
183 if (key->type == KE_KEY &&
184 /* Brightness is served via acpi video driver */
185 (!acpi_video_backlight_support() ||
186 (key->code != MSI_WMI_BRIGHTNESSUP &&
187 key->code != MSI_WMI_BRIGHTNESSDOWN))) {
188 pr_debug("Send key: 0x%X - "
189 "Input layer keycode: %d\n",
190 key->code, key->keycode);
191 sparse_keymap_report_entry(msi_wmi_input_dev,
192 key, 1, true);
193 }
194 } else
195 pr_info("Unknown key pressed - %x\n", eventcode);
196 } else
197 pr_info("Unknown event received\n");
198 kfree(response.pointer);
199}
200
201static int __init msi_wmi_input_setup(void)
202{
203 int err;
204
205 msi_wmi_input_dev = input_allocate_device();
206 if (!msi_wmi_input_dev)
207 return -ENOMEM;
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;
212
213 err = sparse_keymap_setup(msi_wmi_input_dev, msi_wmi_keymap, NULL);
214 if (err)
215 goto err_free_dev;
216
217 err = input_register_device(msi_wmi_input_dev);
218
219 if (err)
220 goto err_free_keymap;
221
222 memset(last_pressed, 0, sizeof(last_pressed));
223
224 return 0;
225
226err_free_keymap:
227 sparse_keymap_free(msi_wmi_input_dev);
228err_free_dev:
229 input_free_device(msi_wmi_input_dev);
230 return err;
231}
232
233static int __init msi_wmi_init(void)
234{
235 int err;
236
237 if (!wmi_has_guid(MSIWMI_EVENT_GUID)) {
238 pr_err("This machine doesn't have MSI-hotkeys through WMI\n");
239 return -ENODEV;
240 }
241 err = wmi_install_notify_handler(MSIWMI_EVENT_GUID,
242 msi_wmi_notify, NULL);
243 if (ACPI_FAILURE(err))
244 return -EINVAL;
245
246 err = msi_wmi_input_setup();
247 if (err)
248 goto err_uninstall_notifier;
249
250 if (!acpi_video_backlight_support()) {
251 struct backlight_properties props;
252 memset(&props, 0, sizeof(struct backlight_properties));
253 props.type = BACKLIGHT_PLATFORM;
254 props.max_brightness = ARRAY_SIZE(backlight_map) - 1;
255 backlight = backlight_device_register(DRV_NAME, NULL, NULL,
256 &msi_backlight_ops,
257 &props);
258 if (IS_ERR(backlight)) {
259 err = PTR_ERR(backlight);
260 goto err_free_input;
261 }
262
263 err = bl_get(NULL);
264 if (err < 0)
265 goto err_free_backlight;
266
267 backlight->props.brightness = err;
268 }
269 pr_debug("Event handler installed\n");
270
271 return 0;
272
273err_free_backlight:
274 backlight_device_unregister(backlight);
275err_free_input:
276 sparse_keymap_free(msi_wmi_input_dev);
277 input_unregister_device(msi_wmi_input_dev);
278err_uninstall_notifier:
279 wmi_remove_notify_handler(MSIWMI_EVENT_GUID);
280 return err;
281}
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);
287 sparse_keymap_free(msi_wmi_input_dev);
288 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);