2 * HP Compaq TC1100 Tablet WMI Extras Driver
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>
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
25 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
28 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/slab.h>
33 #include <linux/init.h>
34 #include <linux/types.h>
35 #include <linux/acpi.h>
36 #include <linux/platform_device.h>
38 #define GUID "C364AC71-36DB-495A-8494-B439D472A505"
40 #define TC1100_INSTANCE_WIRELESS 1
41 #define TC1100_INSTANCE_JOGDIAL 2
43 MODULE_AUTHOR("Jamey Hicks, Carlos Corbacho");
44 MODULE_DESCRIPTION("HP Compaq TC1100 Tablet WMI Extras");
45 MODULE_LICENSE("GPL");
46 MODULE_ALIAS("wmi:C364AC71-36DB-495A-8494-B439D472A505");
48 static struct platform_device *tc1100_device;
55 static struct tc1100_data suspend_data;
57 /* --------------------------------------------------------------------------
59 -------------------------------------------------------------------------- */
61 static int get_state(u32 *out, u8 instance)
65 struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
66 union acpi_object *obj;
74 status = wmi_query_block(GUID, instance, &result);
75 if (ACPI_FAILURE(status))
78 obj = (union acpi_object *) result.pointer;
79 if (obj && obj->type == ACPI_TYPE_INTEGER) {
80 tmp = obj->integer.value;
85 if (result.length > 0)
86 kfree(result.pointer);
89 case TC1100_INSTANCE_WIRELESS:
90 *out = (tmp == 3) ? 1 : 0;
92 case TC1100_INSTANCE_JOGDIAL:
93 *out = (tmp == 1) ? 0 : 1;
100 static int set_state(u32 *in, u8 instance)
104 struct acpi_buffer input;
113 case TC1100_INSTANCE_WIRELESS:
114 value = (*in) ? 1 : 2;
116 case TC1100_INSTANCE_JOGDIAL:
117 value = (*in) ? 0 : 1;
123 input.length = sizeof(u32);
124 input.pointer = &value;
126 status = wmi_set_block(GUID, instance, &input);
127 if (ACPI_FAILURE(status))
133 /* --------------------------------------------------------------------------
135 -------------------------------------------------------------------------- */
138 * Read/ write bool sysfs macro
140 #define show_set_bool(value, instance) \
142 show_bool_##value(struct device *dev, struct device_attribute *attr, \
146 acpi_status status = get_state(&result, instance); \
147 if (ACPI_SUCCESS(status)) \
148 return sprintf(buf, "%d\n", result); \
149 return sprintf(buf, "Read error\n"); \
153 set_bool_##value(struct device *dev, struct device_attribute *attr, \
154 const char *buf, size_t count) \
156 u32 tmp = simple_strtoul(buf, NULL, 10); \
157 acpi_status status = set_state(&tmp, instance); \
158 if (ACPI_FAILURE(status)) \
162 static DEVICE_ATTR(value, S_IRUGO | S_IWUSR, \
163 show_bool_##value, set_bool_##value);
165 show_set_bool(wireless, TC1100_INSTANCE_WIRELESS);
166 show_set_bool(jogdial, TC1100_INSTANCE_JOGDIAL);
168 static struct attribute *tc1100_attributes[] = {
169 &dev_attr_wireless.attr,
170 &dev_attr_jogdial.attr,
174 static struct attribute_group tc1100_attribute_group = {
175 .attrs = tc1100_attributes,
178 /* --------------------------------------------------------------------------
180 -------------------------------------------------------------------------- */
182 static int __init tc1100_probe(struct platform_device *device)
184 return sysfs_create_group(&device->dev.kobj, &tc1100_attribute_group);
188 static int tc1100_remove(struct platform_device *device)
190 sysfs_remove_group(&device->dev.kobj, &tc1100_attribute_group);
196 static int tc1100_suspend(struct device *dev)
200 ret = get_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
204 ret = get_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
211 static int tc1100_resume(struct device *dev)
215 ret = set_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
219 ret = set_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
226 static const struct dev_pm_ops tc1100_pm_ops = {
227 .suspend = tc1100_suspend,
228 .resume = tc1100_resume,
229 .freeze = tc1100_suspend,
230 .restore = tc1100_resume,
234 static struct platform_driver tc1100_driver = {
236 .name = "tc1100-wmi",
238 .pm = &tc1100_pm_ops,
241 .remove = tc1100_remove,
244 static int __init tc1100_init(void)
248 if (!wmi_has_guid(GUID))
251 tc1100_device = platform_device_alloc("tc1100-wmi", -1);
255 error = platform_device_add(tc1100_device);
259 error = platform_driver_probe(&tc1100_driver, tc1100_probe);
263 pr_info("HP Compaq TC1100 Tablet WMI Extras loaded\n");
267 platform_device_del(tc1100_device);
269 platform_device_put(tc1100_device);
273 static void __exit tc1100_exit(void)
275 platform_device_unregister(tc1100_device);
276 platform_driver_unregister(&tc1100_driver);
279 module_init(tc1100_init);
280 module_exit(tc1100_exit);