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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 | ||
33cab1b7 JP |
28 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
29 | ||
dd8cd779 CC |
30 | #include <linux/kernel.h> |
31 | #include <linux/module.h> | |
5a0e3ad6 | 32 | #include <linux/slab.h> |
dd8cd779 CC |
33 | #include <linux/init.h> |
34 | #include <linux/types.h> | |
35 | #include <acpi/acpi.h> | |
dd8cd779 CC |
36 | #include <acpi/acpi_bus.h> |
37 | #include <acpi/acpi_drivers.h> | |
38 | #include <linux/platform_device.h> | |
39 | ||
40 | #define GUID "C364AC71-36DB-495A-8494-B439D472A505" | |
41 | ||
42 | #define TC1100_INSTANCE_WIRELESS 1 | |
43 | #define TC1100_INSTANCE_JOGDIAL 2 | |
44 | ||
dd8cd779 CC |
45 | MODULE_AUTHOR("Jamey Hicks, Carlos Corbacho"); |
46 | MODULE_DESCRIPTION("HP Compaq TC1100 Tablet WMI Extras"); | |
47 | MODULE_LICENSE("GPL"); | |
48 | MODULE_ALIAS("wmi:C364AC71-36DB-495A-8494-B439D472A505"); | |
49 | ||
dd8cd779 CC |
50 | static struct platform_device *tc1100_device; |
51 | ||
52 | struct tc1100_data { | |
53 | u32 wireless; | |
54 | u32 jogdial; | |
55 | }; | |
56 | ||
57 | static struct tc1100_data suspend_data; | |
58 | ||
59 | /* -------------------------------------------------------------------------- | |
60 | Device Management | |
61 | -------------------------------------------------------------------------- */ | |
62 | ||
63 | static int get_state(u32 *out, u8 instance) | |
64 | { | |
65 | u32 tmp; | |
66 | acpi_status status; | |
67 | struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL }; | |
68 | union acpi_object *obj; | |
69 | ||
70 | if (!out) | |
71 | return -EINVAL; | |
72 | ||
73 | if (instance > 2) | |
74 | return -ENODEV; | |
75 | ||
76 | status = wmi_query_block(GUID, instance, &result); | |
77 | if (ACPI_FAILURE(status)) | |
78 | return -ENODEV; | |
79 | ||
80 | obj = (union acpi_object *) result.pointer; | |
07de5bdb KK |
81 | if (obj && obj->type == ACPI_TYPE_INTEGER) { |
82 | tmp = obj->integer.value; | |
dd8cd779 CC |
83 | } else { |
84 | tmp = 0; | |
85 | } | |
86 | ||
87 | if (result.length > 0 && result.pointer) | |
88 | kfree(result.pointer); | |
89 | ||
90 | switch (instance) { | |
91 | case TC1100_INSTANCE_WIRELESS: | |
92 | *out = (tmp == 3) ? 1 : 0; | |
93 | return 0; | |
94 | case TC1100_INSTANCE_JOGDIAL: | |
07de5bdb | 95 | *out = (tmp == 1) ? 0 : 1; |
dd8cd779 CC |
96 | return 0; |
97 | default: | |
98 | return -ENODEV; | |
99 | } | |
100 | } | |
101 | ||
102 | static int set_state(u32 *in, u8 instance) | |
103 | { | |
104 | u32 value; | |
105 | acpi_status status; | |
106 | struct acpi_buffer input; | |
107 | ||
108 | if (!in) | |
109 | return -EINVAL; | |
110 | ||
111 | if (instance > 2) | |
112 | return -ENODEV; | |
113 | ||
114 | switch (instance) { | |
115 | case TC1100_INSTANCE_WIRELESS: | |
116 | value = (*in) ? 1 : 2; | |
117 | break; | |
118 | case TC1100_INSTANCE_JOGDIAL: | |
119 | value = (*in) ? 0 : 1; | |
120 | break; | |
121 | default: | |
122 | return -ENODEV; | |
123 | } | |
124 | ||
125 | input.length = sizeof(u32); | |
126 | input.pointer = &value; | |
127 | ||
128 | status = wmi_set_block(GUID, instance, &input); | |
129 | if (ACPI_FAILURE(status)) | |
130 | return -ENODEV; | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | /* -------------------------------------------------------------------------- | |
136 | FS Interface (/sys) | |
137 | -------------------------------------------------------------------------- */ | |
138 | ||
139 | /* | |
140 | * Read/ write bool sysfs macro | |
141 | */ | |
142 | #define show_set_bool(value, instance) \ | |
143 | static ssize_t \ | |
144 | show_bool_##value(struct device *dev, struct device_attribute *attr, \ | |
145 | char *buf) \ | |
146 | { \ | |
147 | u32 result; \ | |
148 | acpi_status status = get_state(&result, instance); \ | |
149 | if (ACPI_SUCCESS(status)) \ | |
150 | return sprintf(buf, "%d\n", result); \ | |
151 | return sprintf(buf, "Read error\n"); \ | |
152 | } \ | |
153 | \ | |
154 | static ssize_t \ | |
155 | set_bool_##value(struct device *dev, struct device_attribute *attr, \ | |
156 | const char *buf, size_t count) \ | |
157 | { \ | |
158 | u32 tmp = simple_strtoul(buf, NULL, 10); \ | |
159 | acpi_status status = set_state(&tmp, instance); \ | |
160 | if (ACPI_FAILURE(status)) \ | |
161 | return -EINVAL; \ | |
162 | return count; \ | |
163 | } \ | |
8a6a142c | 164 | static DEVICE_ATTR(value, S_IRUGO | S_IWUSR, \ |
dd8cd779 CC |
165 | show_bool_##value, set_bool_##value); |
166 | ||
167 | show_set_bool(wireless, TC1100_INSTANCE_WIRELESS); | |
168 | show_set_bool(jogdial, TC1100_INSTANCE_JOGDIAL); | |
169 | ||
0ad3dc3a DT |
170 | static struct attribute *tc1100_attributes[] = { |
171 | &dev_attr_wireless.attr, | |
172 | &dev_attr_jogdial.attr, | |
173 | NULL | |
174 | }; | |
dd8cd779 | 175 | |
0ad3dc3a DT |
176 | static struct attribute_group tc1100_attribute_group = { |
177 | .attrs = tc1100_attributes, | |
178 | }; | |
dd8cd779 CC |
179 | |
180 | /* -------------------------------------------------------------------------- | |
181 | Driver Model | |
182 | -------------------------------------------------------------------------- */ | |
183 | ||
9634a627 | 184 | static int __init tc1100_probe(struct platform_device *device) |
dd8cd779 | 185 | { |
0ad3dc3a | 186 | return sysfs_create_group(&device->dev.kobj, &tc1100_attribute_group); |
dd8cd779 CC |
187 | } |
188 | ||
189 | ||
b859f159 | 190 | static int tc1100_remove(struct platform_device *device) |
dd8cd779 | 191 | { |
0ad3dc3a DT |
192 | sysfs_remove_group(&device->dev.kobj, &tc1100_attribute_group); |
193 | ||
dd8cd779 CC |
194 | return 0; |
195 | } | |
196 | ||
8e698a3c DT |
197 | #ifdef CONFIG_PM |
198 | static int tc1100_suspend(struct device *dev) | |
dd8cd779 CC |
199 | { |
200 | int ret; | |
201 | ||
202 | ret = get_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS); | |
203 | if (ret) | |
204 | return ret; | |
205 | ||
206 | ret = get_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL); | |
207 | if (ret) | |
208 | return ret; | |
209 | ||
8e698a3c | 210 | return 0; |
dd8cd779 CC |
211 | } |
212 | ||
8e698a3c | 213 | static int tc1100_resume(struct device *dev) |
dd8cd779 CC |
214 | { |
215 | int ret; | |
216 | ||
217 | ret = set_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS); | |
218 | if (ret) | |
219 | return ret; | |
220 | ||
221 | ret = set_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL); | |
222 | if (ret) | |
223 | return ret; | |
224 | ||
8e698a3c | 225 | return 0; |
dd8cd779 CC |
226 | } |
227 | ||
8e698a3c DT |
228 | static const struct dev_pm_ops tc1100_pm_ops = { |
229 | .suspend = tc1100_suspend, | |
230 | .resume = tc1100_resume, | |
231 | .freeze = tc1100_suspend, | |
232 | .restore = tc1100_resume, | |
233 | }; | |
234 | #endif | |
235 | ||
9634a627 DT |
236 | static struct platform_driver tc1100_driver = { |
237 | .driver = { | |
238 | .name = "tc1100-wmi", | |
239 | .owner = THIS_MODULE, | |
8e698a3c DT |
240 | #ifdef CONFIG_PM |
241 | .pm = &tc1100_pm_ops, | |
242 | #endif | |
9634a627 | 243 | }, |
b859f159 | 244 | .remove = tc1100_remove, |
9634a627 DT |
245 | }; |
246 | ||
dd8cd779 CC |
247 | static int __init tc1100_init(void) |
248 | { | |
9634a627 | 249 | int error; |
dd8cd779 CC |
250 | |
251 | if (!wmi_has_guid(GUID)) | |
252 | return -ENODEV; | |
253 | ||
dd8cd779 | 254 | tc1100_device = platform_device_alloc("tc1100-wmi", -1); |
9634a627 DT |
255 | if (!tc1100_device) |
256 | return -ENOMEM; | |
257 | ||
258 | error = platform_device_add(tc1100_device); | |
259 | if (error) | |
260 | goto err_device_put; | |
261 | ||
262 | error = platform_driver_probe(&tc1100_driver, tc1100_probe); | |
263 | if (error) | |
264 | goto err_device_del; | |
dd8cd779 | 265 | |
33cab1b7 | 266 | pr_info("HP Compaq TC1100 Tablet WMI Extras loaded\n"); |
9634a627 | 267 | return 0; |
dd8cd779 | 268 | |
9634a627 DT |
269 | err_device_del: |
270 | platform_device_del(tc1100_device); | |
271 | err_device_put: | |
272 | platform_device_put(tc1100_device); | |
273 | return error; | |
dd8cd779 CC |
274 | } |
275 | ||
276 | static void __exit tc1100_exit(void) | |
277 | { | |
9634a627 | 278 | platform_device_unregister(tc1100_device); |
dd8cd779 | 279 | platform_driver_unregister(&tc1100_driver); |
dd8cd779 CC |
280 | } |
281 | ||
282 | module_init(tc1100_init); | |
283 | module_exit(tc1100_exit); |