291 lines
6.9 KiB
C
291 lines
6.9 KiB
C
/*
|
|
* HP Compaq TC1100 Tablet WMI Extras Driver
|
|
*
|
|
* Copyright (C) 2007 Carlos Corbacho <carlos@strangeworlds.co.uk>
|
|
* Copyright (C) 2004 Jamey Hicks <jamey.hicks@hp.com>
|
|
* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
|
|
* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
|
*
|
|
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/types.h>
|
|
#include <acpi/acpi.h>
|
|
#include <acpi/actypes.h>
|
|
#include <acpi/acpi_bus.h>
|
|
#include <acpi/acpi_drivers.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#define GUID "C364AC71-36DB-495A-8494-B439D472A505"
|
|
|
|
#define TC1100_INSTANCE_WIRELESS 1
|
|
#define TC1100_INSTANCE_JOGDIAL 2
|
|
|
|
#define TC1100_LOGPREFIX "tc1100-wmi: "
|
|
#define TC1100_INFO KERN_INFO TC1100_LOGPREFIX
|
|
|
|
MODULE_AUTHOR("Jamey Hicks, Carlos Corbacho");
|
|
MODULE_DESCRIPTION("HP Compaq TC1100 Tablet WMI Extras");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("wmi:C364AC71-36DB-495A-8494-B439D472A505");
|
|
|
|
static int tc1100_probe(struct platform_device *device);
|
|
static int tc1100_remove(struct platform_device *device);
|
|
static int tc1100_suspend(struct platform_device *device, pm_message_t state);
|
|
static int tc1100_resume(struct platform_device *device);
|
|
|
|
static struct platform_driver tc1100_driver = {
|
|
.driver = {
|
|
.name = "tc1100-wmi",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tc1100_probe,
|
|
.remove = tc1100_remove,
|
|
.suspend = tc1100_suspend,
|
|
.resume = tc1100_resume,
|
|
};
|
|
|
|
static struct platform_device *tc1100_device;
|
|
|
|
struct tc1100_data {
|
|
u32 wireless;
|
|
u32 jogdial;
|
|
};
|
|
|
|
static struct tc1100_data suspend_data;
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Device Management
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int get_state(u32 *out, u8 instance)
|
|
{
|
|
u32 tmp;
|
|
acpi_status status;
|
|
struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
|
|
union acpi_object *obj;
|
|
|
|
if (!out)
|
|
return -EINVAL;
|
|
|
|
if (instance > 2)
|
|
return -ENODEV;
|
|
|
|
status = wmi_query_block(GUID, instance, &result);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
obj = (union acpi_object *) result.pointer;
|
|
if (obj && obj->type == ACPI_TYPE_BUFFER &&
|
|
obj->buffer.length == sizeof(u32)) {
|
|
tmp = *((u32 *) obj->buffer.pointer);
|
|
} else {
|
|
tmp = 0;
|
|
}
|
|
|
|
if (result.length > 0 && result.pointer)
|
|
kfree(result.pointer);
|
|
|
|
switch (instance) {
|
|
case TC1100_INSTANCE_WIRELESS:
|
|
*out = (tmp == 3) ? 1 : 0;
|
|
return 0;
|
|
case TC1100_INSTANCE_JOGDIAL:
|
|
*out = (tmp == 1) ? 1 : 0;
|
|
return 0;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
static int set_state(u32 *in, u8 instance)
|
|
{
|
|
u32 value;
|
|
acpi_status status;
|
|
struct acpi_buffer input;
|
|
|
|
if (!in)
|
|
return -EINVAL;
|
|
|
|
if (instance > 2)
|
|
return -ENODEV;
|
|
|
|
switch (instance) {
|
|
case TC1100_INSTANCE_WIRELESS:
|
|
value = (*in) ? 1 : 2;
|
|
break;
|
|
case TC1100_INSTANCE_JOGDIAL:
|
|
value = (*in) ? 0 : 1;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
|
|
input.length = sizeof(u32);
|
|
input.pointer = &value;
|
|
|
|
status = wmi_set_block(GUID, instance, &input);
|
|
if (ACPI_FAILURE(status))
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
FS Interface (/sys)
|
|
-------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Read/ write bool sysfs macro
|
|
*/
|
|
#define show_set_bool(value, instance) \
|
|
static ssize_t \
|
|
show_bool_##value(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
u32 result; \
|
|
acpi_status status = get_state(&result, instance); \
|
|
if (ACPI_SUCCESS(status)) \
|
|
return sprintf(buf, "%d\n", result); \
|
|
return sprintf(buf, "Read error\n"); \
|
|
} \
|
|
\
|
|
static ssize_t \
|
|
set_bool_##value(struct device *dev, struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
u32 tmp = simple_strtoul(buf, NULL, 10); \
|
|
acpi_status status = set_state(&tmp, instance); \
|
|
if (ACPI_FAILURE(status)) \
|
|
return -EINVAL; \
|
|
return count; \
|
|
} \
|
|
static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
|
|
show_bool_##value, set_bool_##value);
|
|
|
|
show_set_bool(wireless, TC1100_INSTANCE_WIRELESS);
|
|
show_set_bool(jogdial, TC1100_INSTANCE_JOGDIAL);
|
|
|
|
static void remove_fs(void)
|
|
{
|
|
device_remove_file(&tc1100_device->dev, &dev_attr_wireless);
|
|
device_remove_file(&tc1100_device->dev, &dev_attr_jogdial);
|
|
}
|
|
|
|
static int add_fs(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = device_create_file(&tc1100_device->dev, &dev_attr_wireless);
|
|
if (ret)
|
|
goto add_sysfs_error;
|
|
|
|
ret = device_create_file(&tc1100_device->dev, &dev_attr_jogdial);
|
|
if (ret)
|
|
goto add_sysfs_error;
|
|
|
|
return ret;
|
|
|
|
add_sysfs_error:
|
|
remove_fs();
|
|
return ret;
|
|
}
|
|
|
|
/* --------------------------------------------------------------------------
|
|
Driver Model
|
|
-------------------------------------------------------------------------- */
|
|
|
|
static int tc1100_probe(struct platform_device *device)
|
|
{
|
|
int result = 0;
|
|
|
|
result = add_fs();
|
|
return result;
|
|
}
|
|
|
|
|
|
static int tc1100_remove(struct platform_device *device)
|
|
{
|
|
remove_fs();
|
|
return 0;
|
|
}
|
|
|
|
static int tc1100_suspend(struct platform_device *dev, pm_message_t state)
|
|
{
|
|
int ret;
|
|
|
|
ret = get_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = get_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int tc1100_resume(struct platform_device *dev)
|
|
{
|
|
int ret;
|
|
|
|
ret = set_state(&suspend_data.wireless, TC1100_INSTANCE_WIRELESS);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = set_state(&suspend_data.jogdial, TC1100_INSTANCE_JOGDIAL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __init tc1100_init(void)
|
|
{
|
|
int result = 0;
|
|
|
|
if (!wmi_has_guid(GUID))
|
|
return -ENODEV;
|
|
|
|
result = platform_driver_register(&tc1100_driver);
|
|
if (result)
|
|
return result;
|
|
|
|
tc1100_device = platform_device_alloc("tc1100-wmi", -1);
|
|
platform_device_add(tc1100_device);
|
|
|
|
printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras loaded\n");
|
|
|
|
return result;
|
|
}
|
|
|
|
static void __exit tc1100_exit(void)
|
|
{
|
|
platform_device_del(tc1100_device);
|
|
platform_driver_unregister(&tc1100_driver);
|
|
|
|
printk(TC1100_INFO "HP Compaq TC1100 Tablet WMI Extras unloaded\n");
|
|
}
|
|
|
|
module_init(tc1100_init);
|
|
module_exit(tc1100_exit);
|