Commit | Line | Data |
---|---|---|
dd8cd779 CC |
1 | /* |
2 | * HP Compaq TC1100 Tablet WMI Extras Driver | |
3 | * | |
4 | * Copyright (C) 2007 Carlos Corbacho <carlos@strangeworlds.co.uk> | |
5 | * Copyright (C) 2004 Jamey Hicks <jamey.hicks@hp.com> | |
6 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
7 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
8 | * | |
9 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
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 (at | |
14 | * 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 along | |
22 | * with this program; if not, write to the Free Software Foundation, Inc., | |
23 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
24 | * | |
25 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
26 | */ | |
27 | ||
28 | #include <linux/kernel.h> | |
29 | #include <linux/module.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/types.h> | |
32 | #include <acpi/acpi.h> | |
33 | #include <acpi/actypes.h> | |
34 | #include <acpi/acpi_bus.h> | |
35 | #include <acpi/acpi_drivers.h> | |
36 | #include <linux/platform_device.h> | |
37 | ||
38 | #define GUID "C364AC71-36DB-495A-8494-B439D472A505" | |
39 | ||
40 | #define TC1100_INSTANCE_WIRELESS 1 | |
41 | #define TC1100_INSTANCE_JOGDIAL 2 | |
42 | ||
43 | #define TC1100_LOGPREFIX "tc1100-wmi: " | |
44 | #define TC1100_INFO KERN_INFO TC1100_LOGPREFIX | |
45 | ||
46 | MODULE_AUTHOR("Jamey Hicks, Carlos Corbacho"); | |
47 | MODULE_DESCRIPTION("HP Compaq TC1100 Tablet WMI Extras"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | MODULE_ALIAS("wmi:C364AC71-36DB-495A-8494-B439D472A505"); | |
50 | ||
51 | static int tc1100_probe(struct platform_device *device); | |
52 | static int tc1100_remove(struct platform_device *device); | |
53 | static int tc1100_suspend(struct platform_device *device, pm_message_t state); | |
54 | static int tc1100_resume(struct platform_device *device); | |
55 | ||
56 | static struct platform_driver tc1100_driver = { | |
57 | .driver = { | |
58 | .name = "tc1100-wmi", | |
59 | .owner = THIS_MODULE, | |
60 | }, | |
61 | .probe = tc1100_probe, | |
62 | .remove = tc1100_remove, | |
63 | .suspend = tc1100_suspend, | |
64 | .resume = tc1100_resume, | |
65 | }; | |
66 | ||
67 | static struct platform_device *tc1100_device; | |
68 | ||
69 | struct tc1100_data { | |
70 | u32 wireless; | |
71 | u32 jogdial; | |
72 | }; | |
73 | ||
74 | static struct tc1100_data suspend_data; | |
75 | ||
76 | /* -------------------------------------------------------------------------- | |
77 | Device Management | |
78 | -------------------------------------------------------------------------- */ | |
79 | ||
80 | static int get_state(u32 *out, u8 instance) | |
81 | { | |
82 | u32 tmp; | |
83 | acpi_status status; | |
84 | struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL }; | |
85 | union acpi_object *obj; | |
86 | ||
87 | if (!out) | |
88 | return -EINVAL; | |
89 | ||
90 | if (instance > 2) | |
91 | return -ENODEV; | |
92 | ||
93 | status = wmi_query_block(GUID, instance, &result); | |
94 | if (ACPI_FAILURE(status)) | |
95 | return -ENODEV; | |
96 | ||
97 | obj = (union acpi_object *) result.pointer; | |
98 | if (obj && obj->type == ACPI_TYPE_BUFFER && | |
99 | obj->buffer.length == sizeof(u32)) { | |
100 | tmp = *((u32 *) obj->buffer.pointer); | |
101 | } else { | |
102 | tmp = 0; | |
103 | } | |
104 | ||
105 | if (result.length > 0 && result.pointer) | |
106 | kfree(result.pointer); | |
107 | ||
108 | switch (instance) { | |
109 | case TC1100_INSTANCE_WIRELESS: | |
110 | *out = (tmp == 3) ? 1 : 0; | |
111 | return 0; | |
112 | case TC1100_INSTANCE_JOGDIAL: | |
113 | *out = (tmp == 1) ? 1 : 0; | |
114 | return 0; | |
115 | default: | |
116 | return -ENODEV; | |
117 | } | |
118 | } | |
119 | ||
120 | static int set_state(u32 *in, u8 instance) | |
121 | { | |
122 | u32 value; | |
123 | acpi_status status; | |
124 | struct acpi_buffer input; | |
125 | ||
126 | if (!in) | |
127 | return -EINVAL; | |
128 | ||
129 | if (instance > 2) | |
130 | return -ENODEV; | |
131 | ||
132 | switch (instance) { | |
133 | case TC1100_INSTANCE_WIRELESS: | |
134 | value = (*in) ? 1 : 2; | |
135 | break; | |
136 | case TC1100_INSTANCE_JOGDIAL: | |
137 | value = (*in) ? 0 : 1; | |
138 | break; | |
139 | default: | |
140 | return -ENODEV; | |
141 | } | |
142 | ||
143 | input.length = sizeof(u32); | |
144 | input.pointer = &value; | |
145 | ||
146 | status = wmi_set_block(GUID, instance, &input); | |
147 | if (ACPI_FAILURE(status)) | |
148 | return -ENODEV; | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | /* -------------------------------------------------------------------------- | |
154 | FS Interface (/sys) | |
155 | -------------------------------------------------------------------------- */ | |
156 | ||
157 | /* | |
158 | * Read/ write bool sysfs macro | |
159 | */ | |
160 | #define show_set_bool(value, instance) \ | |
161 | static ssize_t \ | |
162 | show_bool_##value(struct device *dev, struct device_attribute *attr, \ | |
163 | char *buf) \ | |
164 | { \ | |
165 | u32 result; \ | |
166 | acpi_status status = get_state(&result, instance); \ | |
167 | if (ACPI_SUCCESS(status)) \ | |
168 | return sprintf(buf, "%d\n", result); \ | |
169 | return sprintf(buf, "Read error\n"); \ | |
170 | } \ | |
171 | \ | |
172 | static ssize_t \ | |
173 | set_bool_##value(struct device *dev, struct device_attribute *attr, \ | |
174 | const char *buf, size_t count) \ | |
175 | { \ | |
176 | u32 tmp = simple_strtoul(buf, NULL, 10); \ | |
177 | acpi_status status = set_state(&tmp, instance); \ | |
178 | if (ACPI_FAILURE(status)) \ | |
179 | return -EINVAL; \ | |
180 | return count; \ | |
181 | } \ | |
182 | static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \ | |
183 | show_bool_##value, set_bool_##value); | |
184 | ||
185 | show_set_bool(wireless, TC1100_INSTANCE_WIRELESS); | |
186 | show_set_bool(jogdial, TC1100_INSTANCE_JOGDIAL); | |
187 | ||
188 | static void remove_fs(void) | |
189 | { | |
190 | device_remove_file(&tc1100_device->dev, &dev_attr_wireless); | |
191 | device_remove_file(&tc1100_device->dev, &dev_attr_jogdial); | |
192 | } | |
193 | ||
194 | static int add_fs(void) | |
195 | { | |
196 | int ret; | |
197 | ||
198 | ret = device_create_file(&tc1100_device->dev, &dev_attr_wireless); | |
199 | if (ret) | |
200 | goto add_sysfs_error; | |
201 | ||
202 | ret = device_create_file(&tc1100_device->dev, &dev_attr_jogdial); | |
203 | if (ret) | |
204 | goto add_sysfs_error; | |
205 | ||
206 | return ret; | |
207 | ||
208 | add_sysfs_error: | |
209 | remove_fs(); | |
210 | return ret; | |
211 | } | |
212 | ||
213 | /* -------------------------------------------------------------------------- | |
214 | Driver Model | |
215 | -------------------------------------------------------------------------- */ | |
216 | ||
217 | static int tc1100_probe(struct platform_device *device) | |
218 | { | |
219 | int result = 0; | |
220 | ||
221 | result = add_fs(); | |
222 | return result; | |
223 | } | |
224 | ||
225 | ||
226 | static int tc1100_remove(struct platform_device *device) | |
227 | { | |
228 | remove_fs(); | |
229 | return 0; | |
230 | } | |
231 | ||
232 | static int tc1100_suspend(struct platform_device *dev, pm_message_t state) | |
233 | { | |
234 | int ret; | |
235 | ||
236 | ret = get_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS); | |
237 | if (ret) | |
238 | return ret; | |
239 | ||
240 | ret = get_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL); | |
241 | if (ret) | |
242 | return ret; | |
243 | ||
244 | return ret; | |
245 | } | |
246 | ||
247 | static int tc1100_resume(struct platform_device *dev) | |
248 | { | |
249 | int ret; | |
250 | ||
251 | ret = set_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS); | |
252 | if (ret) | |
253 | return ret; | |
254 | ||
255 | ret = set_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL); | |
256 | if (ret) | |
257 | return ret; | |
258 | ||
259 | return ret; | |
260 | } | |
261 | ||
262 | static int __init tc1100_init(void) | |
263 | { | |
264 | int result = 0; | |
265 | ||
266 | if (!wmi_has_guid(GUID)) | |
267 | return -ENODEV; | |
268 | ||
269 | result = platform_driver_register(&tc1100_driver); | |
270 | if (result) | |
271 | return result; | |
272 | ||
273 | tc1100_device = platform_device_alloc("tc1100-wmi", -1); | |
274 | platform_device_add(tc1100_device); | |
275 | ||
276 | printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras loaded\n"); | |
277 | ||
278 | return result; | |
279 | } | |
280 | ||
281 | static void __exit tc1100_exit(void) | |
282 | { | |
283 | platform_device_del(tc1100_device); | |
284 | platform_driver_unregister(&tc1100_driver); | |
285 | ||
286 | printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras unloaded\n"); | |
287 | } | |
288 | ||
289 | module_init(tc1100_init); | |
290 | module_exit(tc1100_exit); |