linux/drivers/platform/x86/classmate-laptop.c
Thadeu Lima de Souza Cascardo 02e77a55f7 classmate-laptop: use a single MODULE_DEVICE_TABLE to get correct aliases
Instead of a MODULE_DEVICE_TABLE for every acpi_driver ids table, we
create a table containing all ids to export to get a module alias for
each one.

This will fix automatic loading of the driver when one of the ACPI
devices is not present (like the accelerometer, which is not present in
some models).

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
2010-02-25 11:50:52 -05:00

620 lines
14 KiB
C

/*
* Copyright (C) 2009 Thadeu Lima de Souza Cascardo <cascardo@holoscopio.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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/workqueue.h>
#include <acpi/acpi_drivers.h>
#include <linux/backlight.h>
#include <linux/input.h>
MODULE_LICENSE("GPL");
struct cmpc_accel {
int sensitivity;
};
#define CMPC_ACCEL_SENSITIVITY_DEFAULT 5
#define CMPC_ACCEL_HID "ACCE0000"
#define CMPC_TABLET_HID "TBLT0000"
#define CMPC_BL_HID "IPML200"
#define CMPC_KEYS_HID "FnBT0000"
/*
* Generic input device code.
*/
typedef void (*input_device_init)(struct input_dev *dev);
static int cmpc_add_acpi_notify_device(struct acpi_device *acpi, char *name,
input_device_init idev_init)
{
struct input_dev *inputdev;
int error;
inputdev = input_allocate_device();
if (!inputdev)
return -ENOMEM;
inputdev->name = name;
inputdev->dev.parent = &acpi->dev;
idev_init(inputdev);
error = input_register_device(inputdev);
if (error) {
input_free_device(inputdev);
return error;
}
dev_set_drvdata(&acpi->dev, inputdev);
return 0;
}
static int cmpc_remove_acpi_notify_device(struct acpi_device *acpi)
{
struct input_dev *inputdev = dev_get_drvdata(&acpi->dev);
input_unregister_device(inputdev);
return 0;
}
/*
* Accelerometer code.
*/
static acpi_status cmpc_start_accel(acpi_handle handle)
{
union acpi_object param[2];
struct acpi_object_list input;
acpi_status status;
param[0].type = ACPI_TYPE_INTEGER;
param[0].integer.value = 0x3;
param[1].type = ACPI_TYPE_INTEGER;
input.count = 2;
input.pointer = param;
status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
return status;
}
static acpi_status cmpc_stop_accel(acpi_handle handle)
{
union acpi_object param[2];
struct acpi_object_list input;
acpi_status status;
param[0].type = ACPI_TYPE_INTEGER;
param[0].integer.value = 0x4;
param[1].type = ACPI_TYPE_INTEGER;
input.count = 2;
input.pointer = param;
status = acpi_evaluate_object(handle, "ACMD", &input, NULL);
return status;
}
static acpi_status cmpc_accel_set_sensitivity(acpi_handle handle, int val)
{
union acpi_object param[2];
struct acpi_object_list input;
param[0].type = ACPI_TYPE_INTEGER;
param[0].integer.value = 0x02;
param[1].type = ACPI_TYPE_INTEGER;
param[1].integer.value = val;
input.count = 2;
input.pointer = param;
return acpi_evaluate_object(handle, "ACMD", &input, NULL);
}
static acpi_status cmpc_get_accel(acpi_handle handle,
unsigned char *x,
unsigned char *y,
unsigned char *z)
{
union acpi_object param[2];
struct acpi_object_list input;
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, 0 };
unsigned char *locs;
acpi_status status;
param[0].type = ACPI_TYPE_INTEGER;
param[0].integer.value = 0x01;
param[1].type = ACPI_TYPE_INTEGER;
input.count = 2;
input.pointer = param;
status = acpi_evaluate_object(handle, "ACMD", &input, &output);
if (ACPI_SUCCESS(status)) {
union acpi_object *obj;
obj = output.pointer;
locs = obj->buffer.pointer;
*x = locs[0];
*y = locs[1];
*z = locs[2];
kfree(output.pointer);
}
return status;
}
static void cmpc_accel_handler(struct acpi_device *dev, u32 event)
{
if (event == 0x81) {
unsigned char x, y, z;
acpi_status status;
status = cmpc_get_accel(dev->handle, &x, &y, &z);
if (ACPI_SUCCESS(status)) {
struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
input_report_abs(inputdev, ABS_X, x);
input_report_abs(inputdev, ABS_Y, y);
input_report_abs(inputdev, ABS_Z, z);
input_sync(inputdev);
}
}
}
static ssize_t cmpc_accel_sensitivity_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct acpi_device *acpi;
struct input_dev *inputdev;
struct cmpc_accel *accel;
acpi = to_acpi_device(dev);
inputdev = dev_get_drvdata(&acpi->dev);
accel = dev_get_drvdata(&inputdev->dev);
return sprintf(buf, "%d\n", accel->sensitivity);
}
static ssize_t cmpc_accel_sensitivity_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct acpi_device *acpi;
struct input_dev *inputdev;
struct cmpc_accel *accel;
unsigned long sensitivity;
int r;
acpi = to_acpi_device(dev);
inputdev = dev_get_drvdata(&acpi->dev);
accel = dev_get_drvdata(&inputdev->dev);
r = strict_strtoul(buf, 0, &sensitivity);
if (r)
return r;
accel->sensitivity = sensitivity;
cmpc_accel_set_sensitivity(acpi->handle, sensitivity);
return strnlen(buf, count);
}
struct device_attribute cmpc_accel_sensitivity_attr = {
.attr = { .name = "sensitivity", .mode = 0660 },
.show = cmpc_accel_sensitivity_show,
.store = cmpc_accel_sensitivity_store
};
static int cmpc_accel_open(struct input_dev *input)
{
struct acpi_device *acpi;
acpi = to_acpi_device(input->dev.parent);
if (ACPI_SUCCESS(cmpc_start_accel(acpi->handle)))
return 0;
return -EIO;
}
static void cmpc_accel_close(struct input_dev *input)
{
struct acpi_device *acpi;
acpi = to_acpi_device(input->dev.parent);
cmpc_stop_accel(acpi->handle);
}
static void cmpc_accel_idev_init(struct input_dev *inputdev)
{
set_bit(EV_ABS, inputdev->evbit);
input_set_abs_params(inputdev, ABS_X, 0, 255, 8, 0);
input_set_abs_params(inputdev, ABS_Y, 0, 255, 8, 0);
input_set_abs_params(inputdev, ABS_Z, 0, 255, 8, 0);
inputdev->open = cmpc_accel_open;
inputdev->close = cmpc_accel_close;
}
static int cmpc_accel_add(struct acpi_device *acpi)
{
int error;
struct input_dev *inputdev;
struct cmpc_accel *accel;
accel = kmalloc(sizeof(*accel), GFP_KERNEL);
if (!accel)
return -ENOMEM;
accel->sensitivity = CMPC_ACCEL_SENSITIVITY_DEFAULT;
cmpc_accel_set_sensitivity(acpi->handle, accel->sensitivity);
error = device_create_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
if (error)
goto failed_file;
error = cmpc_add_acpi_notify_device(acpi, "cmpc_accel",
cmpc_accel_idev_init);
if (error)
goto failed_input;
inputdev = dev_get_drvdata(&acpi->dev);
dev_set_drvdata(&inputdev->dev, accel);
return 0;
failed_input:
device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
failed_file:
kfree(accel);
return error;
}
static int cmpc_accel_remove(struct acpi_device *acpi, int type)
{
struct input_dev *inputdev;
struct cmpc_accel *accel;
inputdev = dev_get_drvdata(&acpi->dev);
accel = dev_get_drvdata(&inputdev->dev);
device_remove_file(&acpi->dev, &cmpc_accel_sensitivity_attr);
return cmpc_remove_acpi_notify_device(acpi);
}
static const struct acpi_device_id cmpc_accel_device_ids[] = {
{CMPC_ACCEL_HID, 0},
{"", 0}
};
static struct acpi_driver cmpc_accel_acpi_driver = {
.owner = THIS_MODULE,
.name = "cmpc_accel",
.class = "cmpc_accel",
.ids = cmpc_accel_device_ids,
.ops = {
.add = cmpc_accel_add,
.remove = cmpc_accel_remove,
.notify = cmpc_accel_handler,
}
};
/*
* Tablet mode code.
*/
static acpi_status cmpc_get_tablet(acpi_handle handle,
unsigned long long *value)
{
union acpi_object param;
struct acpi_object_list input;
unsigned long long output;
acpi_status status;
param.type = ACPI_TYPE_INTEGER;
param.integer.value = 0x01;
input.count = 1;
input.pointer = &param;
status = acpi_evaluate_integer(handle, "TCMD", &input, &output);
if (ACPI_SUCCESS(status))
*value = output;
return status;
}
static void cmpc_tablet_handler(struct acpi_device *dev, u32 event)
{
unsigned long long val = 0;
struct input_dev *inputdev = dev_get_drvdata(&dev->dev);
if (event == 0x81) {
if (ACPI_SUCCESS(cmpc_get_tablet(dev->handle, &val)))
input_report_switch(inputdev, SW_TABLET_MODE, !val);
}
}
static void cmpc_tablet_idev_init(struct input_dev *inputdev)
{
unsigned long long val = 0;
struct acpi_device *acpi;
set_bit(EV_SW, inputdev->evbit);
set_bit(SW_TABLET_MODE, inputdev->swbit);
acpi = to_acpi_device(inputdev->dev.parent);
if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val)))
input_report_switch(inputdev, SW_TABLET_MODE, !val);
}
static int cmpc_tablet_add(struct acpi_device *acpi)
{
return cmpc_add_acpi_notify_device(acpi, "cmpc_tablet",
cmpc_tablet_idev_init);
}
static int cmpc_tablet_remove(struct acpi_device *acpi, int type)
{
return cmpc_remove_acpi_notify_device(acpi);
}
static int cmpc_tablet_resume(struct acpi_device *acpi)
{
struct input_dev *inputdev = dev_get_drvdata(&acpi->dev);
unsigned long long val = 0;
if (ACPI_SUCCESS(cmpc_get_tablet(acpi->handle, &val)))
input_report_switch(inputdev, SW_TABLET_MODE, !val);
return 0;
}
static const struct acpi_device_id cmpc_tablet_device_ids[] = {
{CMPC_TABLET_HID, 0},
{"", 0}
};
static struct acpi_driver cmpc_tablet_acpi_driver = {
.owner = THIS_MODULE,
.name = "cmpc_tablet",
.class = "cmpc_tablet",
.ids = cmpc_tablet_device_ids,
.ops = {
.add = cmpc_tablet_add,
.remove = cmpc_tablet_remove,
.resume = cmpc_tablet_resume,
.notify = cmpc_tablet_handler,
}
};
/*
* Backlight code.
*/
static acpi_status cmpc_get_brightness(acpi_handle handle,
unsigned long long *value)
{
union acpi_object param;
struct acpi_object_list input;
unsigned long long output;
acpi_status status;
param.type = ACPI_TYPE_INTEGER;
param.integer.value = 0xC0;
input.count = 1;
input.pointer = &param;
status = acpi_evaluate_integer(handle, "GRDI", &input, &output);
if (ACPI_SUCCESS(status))
*value = output;
return status;
}
static acpi_status cmpc_set_brightness(acpi_handle handle,
unsigned long long value)
{
union acpi_object param[2];
struct acpi_object_list input;
acpi_status status;
unsigned long long output;
param[0].type = ACPI_TYPE_INTEGER;
param[0].integer.value = 0xC0;
param[1].type = ACPI_TYPE_INTEGER;
param[1].integer.value = value;
input.count = 2;
input.pointer = param;
status = acpi_evaluate_integer(handle, "GWRI", &input, &output);
return status;
}
static int cmpc_bl_get_brightness(struct backlight_device *bd)
{
acpi_status status;
acpi_handle handle;
unsigned long long brightness;
handle = bl_get_data(bd);
status = cmpc_get_brightness(handle, &brightness);
if (ACPI_SUCCESS(status))
return brightness;
else
return -1;
}
static int cmpc_bl_update_status(struct backlight_device *bd)
{
acpi_status status;
acpi_handle handle;
handle = bl_get_data(bd);
status = cmpc_set_brightness(handle, bd->props.brightness);
if (ACPI_SUCCESS(status))
return 0;
else
return -1;
}
static struct backlight_ops cmpc_bl_ops = {
.get_brightness = cmpc_bl_get_brightness,
.update_status = cmpc_bl_update_status
};
static int cmpc_bl_add(struct acpi_device *acpi)
{
struct backlight_device *bd;
bd = backlight_device_register("cmpc_bl", &acpi->dev,
acpi->handle, &cmpc_bl_ops);
bd->props.max_brightness = 7;
dev_set_drvdata(&acpi->dev, bd);
return 0;
}
static int cmpc_bl_remove(struct acpi_device *acpi, int type)
{
struct backlight_device *bd;
bd = dev_get_drvdata(&acpi->dev);
backlight_device_unregister(bd);
return 0;
}
static const struct acpi_device_id cmpc_bl_device_ids[] = {
{CMPC_BL_HID, 0},
{"", 0}
};
static struct acpi_driver cmpc_bl_acpi_driver = {
.owner = THIS_MODULE,
.name = "cmpc",
.class = "cmpc",
.ids = cmpc_bl_device_ids,
.ops = {
.add = cmpc_bl_add,
.remove = cmpc_bl_remove
}
};
/*
* Extra keys code.
*/
static int cmpc_keys_codes[] = {
KEY_UNKNOWN,
KEY_WLAN,
KEY_SWITCHVIDEOMODE,
KEY_BRIGHTNESSDOWN,
KEY_BRIGHTNESSUP,
KEY_VENDOR,
KEY_MAX
};
static void cmpc_keys_handler(struct acpi_device *dev, u32 event)
{
struct input_dev *inputdev;
int code = KEY_MAX;
if ((event & 0x0F) < ARRAY_SIZE(cmpc_keys_codes))
code = cmpc_keys_codes[event & 0x0F];
inputdev = dev_get_drvdata(&dev->dev);;
input_report_key(inputdev, code, !(event & 0x10));
}
static void cmpc_keys_idev_init(struct input_dev *inputdev)
{
int i;
set_bit(EV_KEY, inputdev->evbit);
for (i = 0; cmpc_keys_codes[i] != KEY_MAX; i++)
set_bit(cmpc_keys_codes[i], inputdev->keybit);
}
static int cmpc_keys_add(struct acpi_device *acpi)
{
return cmpc_add_acpi_notify_device(acpi, "cmpc_keys",
cmpc_keys_idev_init);
}
static int cmpc_keys_remove(struct acpi_device *acpi, int type)
{
return cmpc_remove_acpi_notify_device(acpi);
}
static const struct acpi_device_id cmpc_keys_device_ids[] = {
{CMPC_KEYS_HID, 0},
{"", 0}
};
static struct acpi_driver cmpc_keys_acpi_driver = {
.owner = THIS_MODULE,
.name = "cmpc_keys",
.class = "cmpc_keys",
.ids = cmpc_keys_device_ids,
.ops = {
.add = cmpc_keys_add,
.remove = cmpc_keys_remove,
.notify = cmpc_keys_handler,
}
};
/*
* General init/exit code.
*/
static int cmpc_init(void)
{
int r;
r = acpi_bus_register_driver(&cmpc_keys_acpi_driver);
if (r)
goto failed_keys;
r = acpi_bus_register_driver(&cmpc_bl_acpi_driver);
if (r)
goto failed_bl;
r = acpi_bus_register_driver(&cmpc_tablet_acpi_driver);
if (r)
goto failed_tablet;
r = acpi_bus_register_driver(&cmpc_accel_acpi_driver);
if (r)
goto failed_accel;
return r;
failed_accel:
acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
failed_tablet:
acpi_bus_unregister_driver(&cmpc_bl_acpi_driver);
failed_bl:
acpi_bus_unregister_driver(&cmpc_keys_acpi_driver);
failed_keys:
return r;
}
static void cmpc_exit(void)
{
acpi_bus_unregister_driver(&cmpc_accel_acpi_driver);
acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver);
acpi_bus_unregister_driver(&cmpc_bl_acpi_driver);
acpi_bus_unregister_driver(&cmpc_keys_acpi_driver);
}
module_init(cmpc_init);
module_exit(cmpc_exit);
static const struct acpi_device_id cmpc_device_ids[] = {
{CMPC_ACCEL_HID, 0},
{CMPC_TABLET_HID, 0},
{CMPC_BL_HID, 0},
{CMPC_KEYS_HID, 0},
{"", 0}
};
MODULE_DEVICE_TABLE(acpi, cmpc_device_ids);