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5411552c CJ |
1 | /*-*-linux-c-*-*/ |
2 | ||
3 | /* | |
4 | Copyright (C) 2008 Cezary Jackiewicz <cezary.jackiewicz (at) gmail.com> | |
5 | ||
6 | based on MSI driver | |
7 | ||
8 | Copyright (C) 2006 Lennart Poettering <mzxreary (at) 0pointer (dot) de> | |
9 | ||
10 | This program is free software; you can redistribute it and/or modify | |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | This program is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU General Public License | |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
23 | 02110-1301, USA. | |
24 | */ | |
25 | ||
26 | /* | |
27 | * comapl-laptop.c - Compal laptop support. | |
28 | * | |
29 | * This driver exports a few files in /sys/devices/platform/compal-laptop/: | |
30 | * | |
5411552c CJ |
31 | * wlan - wlan subsystem state: contains 0 or 1 (rw) |
32 | * | |
33 | * bluetooth - Bluetooth subsystem state: contains 0 or 1 (rw) | |
34 | * | |
35 | * raw - raw value taken from embedded controller register (ro) | |
36 | * | |
37 | * In addition to these platform device attributes the driver | |
38 | * registers itself in the Linux backlight control subsystem and is | |
39 | * available to userspace under /sys/class/backlight/compal-laptop/. | |
40 | * | |
41 | * This driver might work on other laptops produced by Compal. If you | |
42 | * want to try it you can pass force=1 as argument to the module which | |
43 | * will force it to load even when the DMI data doesn't identify the | |
87dc5e32 | 44 | * laptop as FL9x. |
5411552c CJ |
45 | */ |
46 | ||
47 | #include <linux/module.h> | |
48 | #include <linux/kernel.h> | |
49 | #include <linux/init.h> | |
50 | #include <linux/acpi.h> | |
51 | #include <linux/dmi.h> | |
52 | #include <linux/backlight.h> | |
53 | #include <linux/platform_device.h> | |
54 | #include <linux/autoconf.h> | |
55 | ||
87dc5e32 | 56 | #define COMPAL_DRIVER_VERSION "0.2.6" |
5411552c CJ |
57 | |
58 | #define COMPAL_LCD_LEVEL_MAX 8 | |
59 | ||
60 | #define COMPAL_EC_COMMAND_WIRELESS 0xBB | |
61 | #define COMPAL_EC_COMMAND_LCD_LEVEL 0xB9 | |
62 | ||
63 | #define KILLSWITCH_MASK 0x10 | |
64 | #define WLAN_MASK 0x01 | |
65 | #define BT_MASK 0x02 | |
66 | ||
67 | static int force; | |
68 | module_param(force, bool, 0); | |
69 | MODULE_PARM_DESC(force, "Force driver load, ignore DMI data"); | |
70 | ||
71 | /* Hardware access */ | |
72 | ||
73 | static int set_lcd_level(int level) | |
74 | { | |
75 | if (level < 0 || level >= COMPAL_LCD_LEVEL_MAX) | |
76 | return -EINVAL; | |
77 | ||
78 | ec_write(COMPAL_EC_COMMAND_LCD_LEVEL, level); | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | static int get_lcd_level(void) | |
84 | { | |
85 | u8 result; | |
86 | ||
87 | ec_read(COMPAL_EC_COMMAND_LCD_LEVEL, &result); | |
88 | ||
89 | return (int) result; | |
90 | } | |
91 | ||
92 | static int set_wlan_state(int state) | |
93 | { | |
94 | u8 result, value; | |
95 | ||
96 | ec_read(COMPAL_EC_COMMAND_WIRELESS, &result); | |
97 | ||
98 | if ((result & KILLSWITCH_MASK) == 0) | |
99 | return -EINVAL; | |
100 | else { | |
101 | if (state) | |
102 | value = (u8) (result | WLAN_MASK); | |
103 | else | |
104 | value = (u8) (result & ~WLAN_MASK); | |
105 | ec_write(COMPAL_EC_COMMAND_WIRELESS, value); | |
106 | } | |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static int set_bluetooth_state(int state) | |
112 | { | |
113 | u8 result, value; | |
114 | ||
115 | ec_read(COMPAL_EC_COMMAND_WIRELESS, &result); | |
116 | ||
117 | if ((result & KILLSWITCH_MASK) == 0) | |
118 | return -EINVAL; | |
119 | else { | |
120 | if (state) | |
121 | value = (u8) (result | BT_MASK); | |
122 | else | |
123 | value = (u8) (result & ~BT_MASK); | |
124 | ec_write(COMPAL_EC_COMMAND_WIRELESS, value); | |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static int get_wireless_state(int *wlan, int *bluetooth) | |
131 | { | |
132 | u8 result; | |
133 | ||
134 | ec_read(COMPAL_EC_COMMAND_WIRELESS, &result); | |
135 | ||
136 | if (wlan) { | |
137 | if ((result & KILLSWITCH_MASK) == 0) | |
138 | *wlan = 0; | |
139 | else | |
140 | *wlan = result & WLAN_MASK; | |
141 | } | |
142 | ||
143 | if (bluetooth) { | |
144 | if ((result & KILLSWITCH_MASK) == 0) | |
145 | *bluetooth = 0; | |
146 | else | |
147 | *bluetooth = (result & BT_MASK) >> 1; | |
148 | } | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | /* Backlight device stuff */ | |
154 | ||
155 | static int bl_get_brightness(struct backlight_device *b) | |
156 | { | |
157 | return get_lcd_level(); | |
158 | } | |
159 | ||
160 | ||
161 | static int bl_update_status(struct backlight_device *b) | |
162 | { | |
163 | return set_lcd_level(b->props.brightness); | |
164 | } | |
165 | ||
166 | static struct backlight_ops compalbl_ops = { | |
167 | .get_brightness = bl_get_brightness, | |
168 | .update_status = bl_update_status, | |
169 | }; | |
170 | ||
171 | static struct backlight_device *compalbl_device; | |
172 | ||
173 | /* Platform device */ | |
174 | ||
175 | static ssize_t show_wlan(struct device *dev, | |
176 | struct device_attribute *attr, char *buf) | |
177 | { | |
178 | int ret, enabled; | |
179 | ||
180 | ret = get_wireless_state(&enabled, NULL); | |
181 | if (ret < 0) | |
182 | return ret; | |
183 | ||
184 | return sprintf(buf, "%i\n", enabled); | |
185 | } | |
186 | ||
187 | static ssize_t show_raw(struct device *dev, | |
188 | struct device_attribute *attr, char *buf) | |
189 | { | |
190 | u8 result; | |
191 | ||
192 | ec_read(COMPAL_EC_COMMAND_WIRELESS, &result); | |
193 | ||
194 | return sprintf(buf, "%i\n", result); | |
195 | } | |
196 | ||
197 | static ssize_t show_bluetooth(struct device *dev, | |
198 | struct device_attribute *attr, char *buf) | |
199 | { | |
200 | int ret, enabled; | |
201 | ||
202 | ret = get_wireless_state(NULL, &enabled); | |
203 | if (ret < 0) | |
204 | return ret; | |
205 | ||
206 | return sprintf(buf, "%i\n", enabled); | |
207 | } | |
208 | ||
5411552c CJ |
209 | static ssize_t store_wlan_state(struct device *dev, |
210 | struct device_attribute *attr, const char *buf, size_t count) | |
211 | { | |
212 | int state, ret; | |
213 | ||
214 | if (sscanf(buf, "%i", &state) != 1 || (state < 0 || state > 1)) | |
215 | return -EINVAL; | |
216 | ||
217 | ret = set_wlan_state(state); | |
218 | if (ret < 0) | |
219 | return ret; | |
220 | ||
221 | return count; | |
222 | } | |
223 | ||
224 | static ssize_t store_bluetooth_state(struct device *dev, | |
225 | struct device_attribute *attr, const char *buf, size_t count) | |
226 | { | |
227 | int state, ret; | |
228 | ||
229 | if (sscanf(buf, "%i", &state) != 1 || (state < 0 || state > 1)) | |
230 | return -EINVAL; | |
231 | ||
232 | ret = set_bluetooth_state(state); | |
233 | if (ret < 0) | |
234 | return ret; | |
235 | ||
236 | return count; | |
237 | } | |
238 | ||
5411552c CJ |
239 | static DEVICE_ATTR(bluetooth, 0644, show_bluetooth, store_bluetooth_state); |
240 | static DEVICE_ATTR(wlan, 0644, show_wlan, store_wlan_state); | |
241 | static DEVICE_ATTR(raw, 0444, show_raw, NULL); | |
242 | ||
243 | static struct attribute *compal_attributes[] = { | |
5411552c CJ |
244 | &dev_attr_bluetooth.attr, |
245 | &dev_attr_wlan.attr, | |
246 | &dev_attr_raw.attr, | |
247 | NULL | |
248 | }; | |
249 | ||
250 | static struct attribute_group compal_attribute_group = { | |
251 | .attrs = compal_attributes | |
252 | }; | |
253 | ||
254 | static struct platform_driver compal_driver = { | |
255 | .driver = { | |
256 | .name = "compal-laptop", | |
257 | .owner = THIS_MODULE, | |
258 | } | |
259 | }; | |
260 | ||
261 | static struct platform_device *compal_device; | |
262 | ||
263 | /* Initialization */ | |
264 | ||
265 | static int dmi_check_cb(const struct dmi_system_id *id) | |
266 | { | |
267 | printk(KERN_INFO "compal-laptop: Identified laptop model '%s'.\n", | |
268 | id->ident); | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | static struct dmi_system_id __initdata compal_dmi_table[] = { | |
274 | { | |
275 | .ident = "FL90/IFL90", | |
276 | .matches = { | |
277 | DMI_MATCH(DMI_BOARD_NAME, "IFL90"), | |
278 | DMI_MATCH(DMI_BOARD_VERSION, "IFT00"), | |
279 | }, | |
280 | .callback = dmi_check_cb | |
281 | }, | |
282 | { | |
283 | .ident = "FL90/IFL90", | |
284 | .matches = { | |
285 | DMI_MATCH(DMI_BOARD_NAME, "IFL90"), | |
286 | DMI_MATCH(DMI_BOARD_VERSION, "REFERENCE"), | |
287 | }, | |
288 | .callback = dmi_check_cb | |
289 | }, | |
290 | { | |
291 | .ident = "FL91/IFL91", | |
292 | .matches = { | |
293 | DMI_MATCH(DMI_BOARD_NAME, "IFL91"), | |
294 | DMI_MATCH(DMI_BOARD_VERSION, "IFT00"), | |
295 | }, | |
296 | .callback = dmi_check_cb | |
297 | }, | |
298 | { | |
299 | .ident = "FL92/JFL92", | |
300 | .matches = { | |
301 | DMI_MATCH(DMI_BOARD_NAME, "JFL92"), | |
302 | DMI_MATCH(DMI_BOARD_VERSION, "IFT00"), | |
303 | }, | |
304 | .callback = dmi_check_cb | |
305 | }, | |
306 | { | |
307 | .ident = "FT00/IFT00", | |
308 | .matches = { | |
309 | DMI_MATCH(DMI_BOARD_NAME, "IFT00"), | |
310 | DMI_MATCH(DMI_BOARD_VERSION, "IFT00"), | |
311 | }, | |
312 | .callback = dmi_check_cb | |
313 | }, | |
314 | { } | |
315 | }; | |
316 | ||
317 | static int __init compal_init(void) | |
318 | { | |
319 | int ret; | |
320 | ||
321 | if (acpi_disabled) | |
322 | return -ENODEV; | |
323 | ||
324 | if (!force && !dmi_check_system(compal_dmi_table)) | |
325 | return -ENODEV; | |
326 | ||
327 | /* Register backlight stuff */ | |
328 | ||
329 | compalbl_device = backlight_device_register("compal-laptop", NULL, NULL, | |
330 | &compalbl_ops); | |
331 | if (IS_ERR(compalbl_device)) | |
332 | return PTR_ERR(compalbl_device); | |
333 | ||
334 | compalbl_device->props.max_brightness = COMPAL_LCD_LEVEL_MAX-1; | |
335 | ||
336 | ret = platform_driver_register(&compal_driver); | |
337 | if (ret) | |
338 | goto fail_backlight; | |
339 | ||
340 | /* Register platform stuff */ | |
341 | ||
342 | compal_device = platform_device_alloc("compal-laptop", -1); | |
343 | if (!compal_device) { | |
344 | ret = -ENOMEM; | |
345 | goto fail_platform_driver; | |
346 | } | |
347 | ||
348 | ret = platform_device_add(compal_device); | |
349 | if (ret) | |
350 | goto fail_platform_device1; | |
351 | ||
352 | ret = sysfs_create_group(&compal_device->dev.kobj, | |
353 | &compal_attribute_group); | |
354 | if (ret) | |
355 | goto fail_platform_device2; | |
356 | ||
357 | printk(KERN_INFO "compal-laptop: driver "COMPAL_DRIVER_VERSION | |
358 | " successfully loaded.\n"); | |
359 | ||
360 | return 0; | |
361 | ||
362 | fail_platform_device2: | |
363 | ||
364 | platform_device_del(compal_device); | |
365 | ||
366 | fail_platform_device1: | |
367 | ||
368 | platform_device_put(compal_device); | |
369 | ||
370 | fail_platform_driver: | |
371 | ||
372 | platform_driver_unregister(&compal_driver); | |
373 | ||
374 | fail_backlight: | |
375 | ||
376 | backlight_device_unregister(compalbl_device); | |
377 | ||
378 | return ret; | |
379 | } | |
380 | ||
381 | static void __exit compal_cleanup(void) | |
382 | { | |
383 | ||
384 | sysfs_remove_group(&compal_device->dev.kobj, &compal_attribute_group); | |
385 | platform_device_unregister(compal_device); | |
386 | platform_driver_unregister(&compal_driver); | |
387 | backlight_device_unregister(compalbl_device); | |
388 | ||
389 | printk(KERN_INFO "compal-laptop: driver unloaded.\n"); | |
390 | } | |
391 | ||
392 | module_init(compal_init); | |
393 | module_exit(compal_cleanup); | |
394 | ||
395 | MODULE_AUTHOR("Cezary Jackiewicz"); | |
396 | MODULE_DESCRIPTION("Compal Laptop Support"); | |
397 | MODULE_VERSION(COMPAL_DRIVER_VERSION); | |
398 | MODULE_LICENSE("GPL"); | |
399 | ||
400 | MODULE_ALIAS("dmi:*:rnIFL90:rvrIFT00:*"); | |
401 | MODULE_ALIAS("dmi:*:rnIFL90:rvrREFERENCE:*"); | |
402 | MODULE_ALIAS("dmi:*:rnIFL91:rvrIFT00:*"); | |
403 | MODULE_ALIAS("dmi:*:rnJFL92:rvrIFT00:*"); | |
404 | MODULE_ALIAS("dmi:*:rnIFT00:rvrIFT00:*"); |