diff options
author | Jonathan Woithe <jwoithe@physics.adelaide.edu.au> | 2007-08-29 02:28:19 -0400 |
---|---|---|
committer | Len Brown <len.brown@intel.com> | 2007-08-29 03:27:25 -0400 |
commit | d0482533c73a8685f7ce0951a10280cfd58b8825 (patch) | |
tree | 6a39c3f8ded50840ff2d8fc48f4c339307af91dd | |
parent | b07d68b5ca4d55a16fab223d63d5fb36f89ff42f (diff) |
fujitsu-laptop: create Fujitsu laptop platform specific driver
Signed-off-by: Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
Signed-off-by: Len Brown <len.brown@intel.com>
-rw-r--r-- | drivers/misc/Kconfig | 15 | ||||
-rw-r--r-- | drivers/misc/Makefile | 1 | ||||
-rw-r--r-- | drivers/misc/fujitsu-laptop.c | 358 |
3 files changed, 374 insertions, 0 deletions
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index a26655881e6a..df89367032c3 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig | |||
@@ -111,6 +111,21 @@ config ASUS_LAPTOP | |||
111 | 111 | ||
112 | If you have an ACPI-compatible ASUS laptop, say Y or M here. | 112 | If you have an ACPI-compatible ASUS laptop, say Y or M here. |
113 | 113 | ||
114 | config FUJITSU_LAPTOP | ||
115 | tristate "Fujitsu Laptop Extras" | ||
116 | depends on X86 | ||
117 | depends on ACPI | ||
118 | depends on BACKLIGHT_CLASS_DEVICE | ||
119 | ---help--- | ||
120 | This is a driver for laptops built by Fujitsu: | ||
121 | |||
122 | * P2xxx/P5xxx/S6xxx/S7xxx series Lifebooks | ||
123 | * Possibly other Fujitsu laptop models | ||
124 | |||
125 | It adds support for LCD brightness control. | ||
126 | |||
127 | If you have a Fujitsu laptop, say Y or M here. | ||
128 | |||
114 | config MSI_LAPTOP | 129 | config MSI_LAPTOP |
115 | tristate "MSI Laptop Extras" | 130 | tristate "MSI Laptop Extras" |
116 | depends on X86 | 131 | depends on X86 |
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index b5ce0e3dba86..be90d483d2f9 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile | |||
@@ -14,4 +14,5 @@ obj-$(CONFIG_PHANTOM) += phantom.o | |||
14 | obj-$(CONFIG_SGI_IOC4) += ioc4.o | 14 | obj-$(CONFIG_SGI_IOC4) += ioc4.o |
15 | obj-$(CONFIG_SONY_LAPTOP) += sony-laptop.o | 15 | obj-$(CONFIG_SONY_LAPTOP) += sony-laptop.o |
16 | obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o | 16 | obj-$(CONFIG_THINKPAD_ACPI) += thinkpad_acpi.o |
17 | obj-$(CONFIG_FUJITSU_LAPTOP) += fujitsu-laptop.o | ||
17 | obj-$(CONFIG_EEPROM_93CX6) += eeprom_93cx6.o | 18 | obj-$(CONFIG_EEPROM_93CX6) += eeprom_93cx6.o |
diff --git a/drivers/misc/fujitsu-laptop.c b/drivers/misc/fujitsu-laptop.c new file mode 100644 index 000000000000..d366a6cc1fd9 --- /dev/null +++ b/drivers/misc/fujitsu-laptop.c | |||
@@ -0,0 +1,358 @@ | |||
1 | /*-*-linux-c-*-*/ | ||
2 | |||
3 | /* | ||
4 | Copyright (C) 2007 Jonathan Woithe <jwoithe@physics.adelaide.edu.au> | ||
5 | Based on earlier work: | ||
6 | Copyright (C) 2003 Shane Spencer <shane@bogomip.com> | ||
7 | Adrian Yee <brewt-fujitsu@brewt.org> | ||
8 | |||
9 | Templated from msi-laptop.c which is copyright by its respective authors. | ||
10 | |||
11 | This program is free software; you can redistribute it and/or modify | ||
12 | it under the terms of the GNU General Public License as published by | ||
13 | the Free Software Foundation; either version 2 of the License, or | ||
14 | (at your option) any later version. | ||
15 | |||
16 | This program is distributed in the hope that it will be useful, but | ||
17 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
19 | General Public License for more details. | ||
20 | |||
21 | You should have received a copy of the GNU General Public License | ||
22 | along with this program; if not, write to the Free Software | ||
23 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | ||
24 | 02110-1301, USA. | ||
25 | */ | ||
26 | |||
27 | /* | ||
28 | * fujitsu-laptop.c - Fujitsu laptop support, providing access to additional | ||
29 | * features made available on a range of Fujitsu laptops including the | ||
30 | * P2xxx/P5xxx/S6xxx/S7xxx series. | ||
31 | * | ||
32 | * This driver exports a few files in /sys/devices/platform/fujitsu-laptop/; | ||
33 | * others may be added at a later date. | ||
34 | * | ||
35 | * lcd_level - Screen brightness: contains a single integer in the | ||
36 | * range 0..7. (rw) | ||
37 | * | ||
38 | * In addition to these platform device attributes the driver | ||
39 | * registers itself in the Linux backlight control subsystem and is | ||
40 | * available to userspace under /sys/class/backlight/fujitsu-laptop/. | ||
41 | * | ||
42 | * This driver has been tested on a Fujitsu Lifebook S7020. It should | ||
43 | * work on most P-series and S-series Lifebooks, but YMMV. | ||
44 | */ | ||
45 | |||
46 | #include <linux/module.h> | ||
47 | #include <linux/kernel.h> | ||
48 | #include <linux/init.h> | ||
49 | #include <linux/acpi.h> | ||
50 | #include <linux/dmi.h> | ||
51 | #include <linux/backlight.h> | ||
52 | #include <linux/platform_device.h> | ||
53 | #include <linux/autoconf.h> | ||
54 | |||
55 | #define FUJITSU_DRIVER_VERSION "0.3" | ||
56 | |||
57 | #define FUJITSU_LCD_N_LEVELS 8 | ||
58 | |||
59 | #define ACPI_FUJITSU_CLASS "fujitsu" | ||
60 | #define ACPI_FUJITSU_HID "FUJ02B1" | ||
61 | #define ACPI_FUJITSU_DRIVER_NAME "Fujitsu laptop FUJ02B1 ACPI extras driver" | ||
62 | #define ACPI_FUJITSU_DEVICE_NAME "Fujitsu FUJ02B1" | ||
63 | |||
64 | struct fujitsu_t { | ||
65 | acpi_handle acpi_handle; | ||
66 | struct backlight_device *bl_device; | ||
67 | struct platform_device *pf_device; | ||
68 | |||
69 | unsigned long fuj02b1_state; | ||
70 | unsigned int brightness_changed; | ||
71 | unsigned int brightness_level; | ||
72 | }; | ||
73 | |||
74 | static struct fujitsu_t *fujitsu; | ||
75 | |||
76 | /* Hardware access */ | ||
77 | |||
78 | static int set_lcd_level(int level) | ||
79 | { | ||
80 | acpi_status status = AE_OK; | ||
81 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | ||
82 | struct acpi_object_list arg_list = { 1, &arg0 }; | ||
83 | acpi_handle handle = NULL; | ||
84 | |||
85 | if (level < 0 || level >= FUJITSU_LCD_N_LEVELS) | ||
86 | return -EINVAL; | ||
87 | |||
88 | if (!fujitsu) | ||
89 | return -EINVAL; | ||
90 | |||
91 | status = acpi_get_handle(fujitsu->acpi_handle, "SBLL", &handle); | ||
92 | if (ACPI_FAILURE(status)) { | ||
93 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "SBLL not present\n")); | ||
94 | return -ENODEV; | ||
95 | } | ||
96 | |||
97 | arg0.integer.value = level; | ||
98 | |||
99 | status = acpi_evaluate_object(handle, NULL, &arg_list, NULL); | ||
100 | if (ACPI_FAILURE(status)) | ||
101 | return -ENODEV; | ||
102 | |||
103 | return 0; | ||
104 | } | ||
105 | |||
106 | static int get_lcd_level(void) | ||
107 | { | ||
108 | unsigned long state = 0; | ||
109 | acpi_status status = AE_OK; | ||
110 | |||
111 | // Get the Brightness | ||
112 | status = | ||
113 | acpi_evaluate_integer(fujitsu->acpi_handle, "GBLL", NULL, &state); | ||
114 | if (status < 0) | ||
115 | return status; | ||
116 | |||
117 | fujitsu->fuj02b1_state = state; | ||
118 | fujitsu->brightness_level = state & 0x0fffffff; | ||
119 | |||
120 | if (state & 0x80000000) | ||
121 | fujitsu->brightness_changed = 1; | ||
122 | else | ||
123 | fujitsu->brightness_changed = 0; | ||
124 | |||
125 | if (status < 0) | ||
126 | return status; | ||
127 | |||
128 | return fujitsu->brightness_level; | ||
129 | } | ||
130 | |||
131 | /* Backlight device stuff */ | ||
132 | |||
133 | static int bl_get_brightness(struct backlight_device *b) | ||
134 | { | ||
135 | return get_lcd_level(); | ||
136 | } | ||
137 | |||
138 | static int bl_update_status(struct backlight_device *b) | ||
139 | { | ||
140 | return set_lcd_level(b->props.brightness); | ||
141 | } | ||
142 | |||
143 | static struct backlight_ops fujitsubl_ops = { | ||
144 | .get_brightness = bl_get_brightness, | ||
145 | .update_status = bl_update_status, | ||
146 | }; | ||
147 | |||
148 | /* Platform device */ | ||
149 | |||
150 | static ssize_t show_lcd_level(struct device *dev, | ||
151 | struct device_attribute *attr, char *buf) | ||
152 | { | ||
153 | |||
154 | int ret; | ||
155 | |||
156 | ret = get_lcd_level(); | ||
157 | if (ret < 0) | ||
158 | return ret; | ||
159 | |||
160 | return sprintf(buf, "%i\n", ret); | ||
161 | } | ||
162 | |||
163 | static ssize_t store_lcd_level(struct device *dev, | ||
164 | struct device_attribute *attr, const char *buf, | ||
165 | size_t count) | ||
166 | { | ||
167 | |||
168 | int level, ret; | ||
169 | |||
170 | if (sscanf(buf, "%i", &level) != 1 | ||
171 | || (level < 0 || level >= FUJITSU_LCD_N_LEVELS)) | ||
172 | return -EINVAL; | ||
173 | |||
174 | ret = set_lcd_level(level); | ||
175 | if (ret < 0) | ||
176 | return ret; | ||
177 | |||
178 | return count; | ||
179 | } | ||
180 | |||
181 | static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level); | ||
182 | |||
183 | static struct attribute *fujitsupf_attributes[] = { | ||
184 | &dev_attr_lcd_level.attr, | ||
185 | NULL | ||
186 | }; | ||
187 | |||
188 | static struct attribute_group fujitsupf_attribute_group = { | ||
189 | .attrs = fujitsupf_attributes | ||
190 | }; | ||
191 | |||
192 | static struct platform_driver fujitsupf_driver = { | ||
193 | .driver = { | ||
194 | .name = "fujitsu-laptop", | ||
195 | .owner = THIS_MODULE, | ||
196 | } | ||
197 | }; | ||
198 | |||
199 | /* ACPI device */ | ||
200 | |||
201 | int acpi_fujitsu_add(struct acpi_device *device) | ||
202 | { | ||
203 | int result = 0; | ||
204 | int state = 0; | ||
205 | |||
206 | ACPI_FUNCTION_TRACE("acpi_fujitsu_add"); | ||
207 | |||
208 | if (!device) | ||
209 | return -EINVAL; | ||
210 | |||
211 | fujitsu->acpi_handle = device->handle; | ||
212 | sprintf(acpi_device_name(device), "%s", ACPI_FUJITSU_DEVICE_NAME); | ||
213 | sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS); | ||
214 | acpi_driver_data(device) = fujitsu; | ||
215 | |||
216 | result = acpi_bus_get_power(fujitsu->acpi_handle, &state); | ||
217 | if (result) { | ||
218 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | ||
219 | "Error reading power state\n")); | ||
220 | goto end; | ||
221 | } | ||
222 | |||
223 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", | ||
224 | acpi_device_name(device), acpi_device_bid(device), | ||
225 | !device->power.state ? "on" : "off"); | ||
226 | |||
227 | end: | ||
228 | |||
229 | return result; | ||
230 | } | ||
231 | |||
232 | int acpi_fujitsu_remove(struct acpi_device *device, int type) | ||
233 | { | ||
234 | ACPI_FUNCTION_TRACE("acpi_fujitsu_remove"); | ||
235 | |||
236 | if (!device || !acpi_driver_data(device)) | ||
237 | return -EINVAL; | ||
238 | fujitsu->acpi_handle = 0; | ||
239 | |||
240 | return 0; | ||
241 | } | ||
242 | |||
243 | static const struct acpi_device_id fujitsu_device_ids[] = { | ||
244 | {ACPI_FUJITSU_HID, 0}, | ||
245 | {"", 0}, | ||
246 | }; | ||
247 | |||
248 | static struct acpi_driver acpi_fujitsu_driver = { | ||
249 | .name = ACPI_FUJITSU_DRIVER_NAME, | ||
250 | .class = ACPI_FUJITSU_CLASS, | ||
251 | .ids = fujitsu_device_ids, | ||
252 | .ops = { | ||
253 | .add = acpi_fujitsu_add, | ||
254 | .remove = acpi_fujitsu_remove, | ||
255 | }, | ||
256 | }; | ||
257 | |||
258 | /* Initialization */ | ||
259 | |||
260 | static int __init fujitsu_init(void) | ||
261 | { | ||
262 | int ret, result; | ||
263 | |||
264 | if (acpi_disabled) | ||
265 | return -ENODEV; | ||
266 | |||
267 | fujitsu = kmalloc(sizeof(struct fujitsu_t), GFP_KERNEL); | ||
268 | if (!fujitsu) | ||
269 | return -ENOMEM; | ||
270 | memset(fujitsu, 0, sizeof(struct fujitsu_t)); | ||
271 | |||
272 | result = acpi_bus_register_driver(&acpi_fujitsu_driver); | ||
273 | if (result < 0) { | ||
274 | ret = -ENODEV; | ||
275 | goto fail_acpi; | ||
276 | } | ||
277 | |||
278 | /* Register backlight stuff */ | ||
279 | |||
280 | fujitsu->bl_device = | ||
281 | backlight_device_register("fujitsu-laptop", NULL, NULL, | ||
282 | &fujitsubl_ops); | ||
283 | if (IS_ERR(fujitsu->bl_device)) | ||
284 | return PTR_ERR(fujitsu->bl_device); | ||
285 | |||
286 | fujitsu->bl_device->props.max_brightness = FUJITSU_LCD_N_LEVELS - 1; | ||
287 | ret = platform_driver_register(&fujitsupf_driver); | ||
288 | if (ret) | ||
289 | goto fail_backlight; | ||
290 | |||
291 | /* Register platform stuff */ | ||
292 | |||
293 | fujitsu->pf_device = platform_device_alloc("fujitsu-laptop", -1); | ||
294 | if (!fujitsu->pf_device) { | ||
295 | ret = -ENOMEM; | ||
296 | goto fail_platform_driver; | ||
297 | } | ||
298 | |||
299 | ret = platform_device_add(fujitsu->pf_device); | ||
300 | if (ret) | ||
301 | goto fail_platform_device1; | ||
302 | |||
303 | ret = | ||
304 | sysfs_create_group(&fujitsu->pf_device->dev.kobj, | ||
305 | &fujitsupf_attribute_group); | ||
306 | if (ret) | ||
307 | goto fail_platform_device2; | ||
308 | |||
309 | printk(KERN_INFO "fujitsu-laptop: driver " FUJITSU_DRIVER_VERSION | ||
310 | " successfully loaded.\n"); | ||
311 | |||
312 | return 0; | ||
313 | |||
314 | fail_platform_device2: | ||
315 | |||
316 | platform_device_del(fujitsu->pf_device); | ||
317 | |||
318 | fail_platform_device1: | ||
319 | |||
320 | platform_device_put(fujitsu->pf_device); | ||
321 | |||
322 | fail_platform_driver: | ||
323 | |||
324 | platform_driver_unregister(&fujitsupf_driver); | ||
325 | |||
326 | fail_backlight: | ||
327 | |||
328 | backlight_device_unregister(fujitsu->bl_device); | ||
329 | |||
330 | fail_acpi: | ||
331 | |||
332 | kfree(fujitsu); | ||
333 | |||
334 | return ret; | ||
335 | } | ||
336 | |||
337 | static void __exit fujitsu_cleanup(void) | ||
338 | { | ||
339 | sysfs_remove_group(&fujitsu->pf_device->dev.kobj, | ||
340 | &fujitsupf_attribute_group); | ||
341 | platform_device_unregister(fujitsu->pf_device); | ||
342 | platform_driver_unregister(&fujitsupf_driver); | ||
343 | backlight_device_unregister(fujitsu->bl_device); | ||
344 | |||
345 | acpi_bus_unregister_driver(&acpi_fujitsu_driver); | ||
346 | |||
347 | kfree(fujitsu); | ||
348 | |||
349 | printk(KERN_INFO "fujitsu-laptop: driver unloaded.\n"); | ||
350 | } | ||
351 | |||
352 | module_init(fujitsu_init); | ||
353 | module_exit(fujitsu_cleanup); | ||
354 | |||
355 | MODULE_AUTHOR("Jonathan Woithe"); | ||
356 | MODULE_DESCRIPTION("Fujitsu laptop extras support"); | ||
357 | MODULE_VERSION(FUJITSU_DRIVER_VERSION); | ||
358 | MODULE_LICENSE("GPL"); | ||