247 lines
6.3 KiB
C
247 lines
6.3 KiB
C
/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 and
|
|
* only version 2 as published by the Free Software Foundation.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ioctl.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/uaccess.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/device.h>
|
|
#include <linux/cdev.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <media/rc-core.h>
|
|
#include <media/user-rc-input.h>
|
|
|
|
#define MAX_SP_DEVICES 1
|
|
#define USER_SP_INPUT_DEV_NAME "user-sp-input"
|
|
#define USER_SP_INPUT_DRV_NAME "sp-user-input"
|
|
|
|
struct user_sp_input_dev {
|
|
struct cdev sp_input_cdev;
|
|
struct class *sp_input_class;
|
|
struct device *sp_input_dev;
|
|
struct rc_dev *spdev;
|
|
dev_t sp_input_base_dev;
|
|
struct device *dev;
|
|
int in_use;
|
|
};
|
|
|
|
static int user_sp_input_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct cdev *input_cdev = inode->i_cdev;
|
|
struct user_sp_input_dev *input_dev =
|
|
container_of(input_cdev, struct user_sp_input_dev, sp_input_cdev);
|
|
|
|
if (input_dev->in_use) {
|
|
dev_err(input_dev->dev,
|
|
"Device is already open..only one instance is allowed\n");
|
|
return -EBUSY;
|
|
}
|
|
input_dev->in_use++;
|
|
file->private_data = input_dev;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int user_sp_input_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct user_sp_input_dev *input_dev = file->private_data;
|
|
|
|
input_dev->in_use--;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t user_sp_input_write(struct file *file,
|
|
const char __user *buffer, size_t count, loff_t *ppos)
|
|
{
|
|
int ret = count;
|
|
struct user_sp_input_dev *input_dev = file->private_data;
|
|
unsigned char cmd = 0;
|
|
int scancode = 0;
|
|
|
|
if (copy_from_user(&cmd, buffer, 1)) {
|
|
dev_err(input_dev->dev, "Copy from user failed\n");
|
|
ret = -EFAULT;
|
|
goto out_free;
|
|
}
|
|
|
|
if (copy_from_user(&scancode, &buffer[1], 4)) {
|
|
dev_err(input_dev->dev, "Copy from user failed\n");
|
|
ret = -EFAULT;
|
|
goto out_free;
|
|
}
|
|
|
|
switch (cmd) {
|
|
case USER_CONTROL_PRESSED:
|
|
dev_dbg(input_dev->dev, "user controlled pressed 0x%x\n",
|
|
scancode);
|
|
rc_keydown(input_dev->spdev, scancode, 0);
|
|
break;
|
|
case USER_CONTROL_REPEATED:
|
|
dev_dbg(input_dev->dev, "user controlled repeated 0x%x\n",
|
|
scancode);
|
|
rc_repeat(input_dev->spdev);
|
|
break;
|
|
case USER_CONTROL_RELEASED:
|
|
dev_dbg(input_dev->dev, "user controlled released 0x%x\n",
|
|
scancode);
|
|
rc_keyup(input_dev->spdev);
|
|
break;
|
|
}
|
|
|
|
out_free:
|
|
return ret;
|
|
}
|
|
|
|
const struct file_operations sp_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = user_sp_input_open,
|
|
.write = user_sp_input_write,
|
|
.release = user_sp_input_release,
|
|
};
|
|
|
|
static int user_sp_input_probe(struct platform_device *pdev)
|
|
{
|
|
struct user_sp_input_dev *user_sp_dev;
|
|
struct rc_dev *spdev;
|
|
int retval;
|
|
|
|
user_sp_dev = kzalloc(sizeof(struct user_sp_input_dev), GFP_KERNEL);
|
|
if (!user_sp_dev)
|
|
return -ENOMEM;
|
|
|
|
user_sp_dev->sp_input_class = class_create(THIS_MODULE,
|
|
"user-sp-input-loopback");
|
|
|
|
if (IS_ERR(user_sp_dev->sp_input_class)) {
|
|
retval = PTR_ERR(user_sp_dev->sp_input_class);
|
|
goto err;
|
|
}
|
|
|
|
retval = alloc_chrdev_region(&user_sp_dev->sp_input_base_dev, 0,
|
|
MAX_SP_DEVICES, USER_SP_INPUT_DEV_NAME);
|
|
|
|
if (retval) {
|
|
dev_err(&pdev->dev,
|
|
"alloc_chrdev_region failed\n");
|
|
goto alloc_chrdev_err;
|
|
}
|
|
|
|
dev_info(&pdev->dev, "User space report standby key event input" \
|
|
" driver registered, major %d\n",
|
|
MAJOR(user_sp_dev->sp_input_base_dev));
|
|
|
|
cdev_init(&user_sp_dev->sp_input_cdev, &sp_fops);
|
|
retval = cdev_add(&user_sp_dev->sp_input_cdev,
|
|
user_sp_dev->sp_input_base_dev, MAX_SP_DEVICES);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "cdev_add failed\n");
|
|
goto cdev_add_err;
|
|
}
|
|
user_sp_dev->sp_input_dev = device_create(user_sp_dev->sp_input_class,
|
|
NULL, MKDEV(MAJOR(user_sp_dev->sp_input_base_dev), 0), NULL,
|
|
"user-sp-input-dev%d", 0);
|
|
|
|
if (IS_ERR(user_sp_dev->sp_input_dev)) {
|
|
retval = PTR_ERR(user_sp_dev->sp_input_dev);
|
|
dev_err(&pdev->dev, "device_create failed\n");
|
|
goto device_create_err;
|
|
}
|
|
|
|
spdev = rc_allocate_device();
|
|
if (!spdev) {
|
|
dev_err(&pdev->dev, "failed to allocate rc device");
|
|
retval = -ENOMEM;
|
|
goto err_allocate_device;
|
|
}
|
|
|
|
spdev->driver_type = RC_DRIVER_SCANCODE;
|
|
spdev->allowed_protos = RC_TYPE_OTHER;
|
|
spdev->input_name = USER_SP_INPUT_DEV_NAME;
|
|
spdev->input_id.bustype = BUS_HOST;
|
|
spdev->driver_name = USER_SP_INPUT_DRV_NAME;
|
|
spdev->map_name = RC_MAP_RC6_PHILIPS;
|
|
|
|
retval = rc_register_device(spdev);
|
|
if (retval < 0) {
|
|
dev_err(&pdev->dev, "failed to register rc device\n");
|
|
goto rc_register_err;
|
|
}
|
|
user_sp_dev->spdev = spdev;
|
|
user_sp_dev->dev = &pdev->dev;
|
|
platform_set_drvdata(pdev, user_sp_dev);
|
|
user_sp_dev->in_use = 0;
|
|
|
|
return 0;
|
|
|
|
rc_register_err:
|
|
rc_free_device(spdev);
|
|
err_allocate_device:
|
|
device_destroy(user_sp_dev->sp_input_class,
|
|
MKDEV(MAJOR(user_sp_dev->sp_input_base_dev), 0));
|
|
cdev_add_err:
|
|
unregister_chrdev_region(user_sp_dev->sp_input_base_dev,
|
|
MAX_SP_DEVICES);
|
|
device_create_err:
|
|
cdev_del(&user_sp_dev->sp_input_cdev);
|
|
alloc_chrdev_err:
|
|
class_destroy(user_sp_dev->sp_input_class);
|
|
err:
|
|
kfree(user_sp_dev);
|
|
return retval;
|
|
}
|
|
|
|
static int user_sp_input_remove(struct platform_device *pdev)
|
|
{
|
|
struct user_sp_input_dev *user_sp_dev = platform_get_drvdata(pdev);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
rc_free_device(user_sp_dev->spdev);
|
|
device_destroy(user_sp_dev->sp_input_class,
|
|
MKDEV(MAJOR(user_sp_dev->sp_input_base_dev), 0));
|
|
unregister_chrdev_region(user_sp_dev->sp_input_base_dev,
|
|
MAX_SP_DEVICES);
|
|
cdev_del(&user_sp_dev->sp_input_cdev);
|
|
class_destroy(user_sp_dev->sp_input_class);
|
|
kfree(user_sp_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver user_sp_input_driver = {
|
|
.probe = user_sp_input_probe,
|
|
.remove = user_sp_input_remove,
|
|
.driver = {
|
|
.name = USER_SP_INPUT_DRV_NAME,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init user_sp_input_init(void)
|
|
{
|
|
return platform_driver_register(&user_sp_input_driver);
|
|
}
|
|
module_init(user_sp_input_init);
|
|
|
|
static void __exit user_sp_input_exit(void)
|
|
{
|
|
platform_driver_unregister(&user_sp_input_driver);
|
|
}
|
|
module_exit(user_sp_input_exit);
|
|
|
|
MODULE_DESCRIPTION("User SP RC Input driver");
|
|
MODULE_LICENSE("GPL v2");
|