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 #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/acpi_bus.h>
34 #include <acpi/acpi_drivers.h>
35 #include <linux/platform_device.h>
37 #define GUID "C364AC71-36DB-495A-8494-B439D472A505"
39 #define TC1100_INSTANCE_WIRELESS 1
40 #define TC1100_INSTANCE_JOGDIAL 2
42 #define TC1100_LOGPREFIX "tc1100-wmi: "
43 #define TC1100_INFO KERN_INFO TC1100_LOGPREFIX
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");
50 static int tc1100_probe(struct platform_device *device);
51 static int tc1100_remove(struct platform_device *device);
52 static int tc1100_suspend(struct platform_device *device, pm_message_t state);
53 static int tc1100_resume(struct platform_device *device);
55 static struct platform_driver tc1100_driver = {
60 .probe = tc1100_probe,
61 .remove = tc1100_remove,
62 .suspend = tc1100_suspend,
63 .resume = tc1100_resume,
66 static struct platform_device *tc1100_device;
73 static struct tc1100_data suspend_data;
75 /* --------------------------------------------------------------------------
77 -------------------------------------------------------------------------- */
79 static int get_state(u32 *out, u8 instance)
83 struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
84 union acpi_object *obj;
92 status = wmi_query_block(GUID, instance, &result);
93 if (ACPI_FAILURE(status))
96 obj = (union acpi_object *) result.pointer;
97 if (obj && obj->type == ACPI_TYPE_INTEGER) {
98 tmp = obj->integer.value;
103 if (result.length > 0 && result.pointer)
104 kfree(result.pointer);
107 case TC1100_INSTANCE_WIRELESS:
108 *out = (tmp == 3) ? 1 : 0;
110 case TC1100_INSTANCE_JOGDIAL:
111 *out = (tmp == 1) ? 0 : 1;
118 static int set_state(u32 *in, u8 instance)
122 struct acpi_buffer input;
131 case TC1100_INSTANCE_WIRELESS:
132 value = (*in) ? 1 : 2;
134 case TC1100_INSTANCE_JOGDIAL:
135 value = (*in) ? 0 : 1;
141 input.length = sizeof(u32);
142 input.pointer = &value;
144 status = wmi_set_block(GUID, instance, &input);
145 if (ACPI_FAILURE(status))
151 /* --------------------------------------------------------------------------
153 -------------------------------------------------------------------------- */
156 * Read/ write bool sysfs macro
158 #define show_set_bool(value, instance) \
160 show_bool_##value(struct device *dev, struct device_attribute *attr, \
164 acpi_status status = get_state(&result, instance); \
165 if (ACPI_SUCCESS(status)) \
166 return sprintf(buf, "%d\n", result); \
167 return sprintf(buf, "Read error\n"); \
171 set_bool_##value(struct device *dev, struct device_attribute *attr, \
172 const char *buf, size_t count) \
174 u32 tmp = simple_strtoul(buf, NULL, 10); \
175 acpi_status status = set_state(&tmp, instance); \
176 if (ACPI_FAILURE(status)) \
180 static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
181 show_bool_##value, set_bool_##value);
183 show_set_bool(wireless, TC1100_INSTANCE_WIRELESS);
184 show_set_bool(jogdial, TC1100_INSTANCE_JOGDIAL);
186 static struct attribute *tc1100_attributes[] = {
187 &dev_attr_wireless.attr,
188 &dev_attr_jogdial.attr,
192 static struct attribute_group tc1100_attribute_group = {
193 .attrs = tc1100_attributes,
196 /* --------------------------------------------------------------------------
198 -------------------------------------------------------------------------- */
200 static int tc1100_probe(struct platform_device *device)
202 return sysfs_create_group(&device->dev.kobj, &tc1100_attribute_group);
206 static int tc1100_remove(struct platform_device *device)
208 sysfs_remove_group(&device->dev.kobj, &tc1100_attribute_group);
213 static int tc1100_suspend(struct platform_device *dev, pm_message_t state)
217 ret = get_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
221 ret = get_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
228 static int tc1100_resume(struct platform_device *dev)
232 ret = set_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
236 ret = set_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
243 static int __init tc1100_init(void)
247 if (!wmi_has_guid(GUID))
250 result = platform_driver_register(&tc1100_driver);
254 tc1100_device = platform_device_alloc("tc1100-wmi", -1);
255 platform_device_add(tc1100_device);
257 printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras loaded\n");
262 static void __exit tc1100_exit(void)
264 platform_device_del(tc1100_device);
265 platform_driver_unregister(&tc1100_driver);
267 printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras unloaded\n");
270 module_init(tc1100_init);
271 module_exit(tc1100_exit);