diff options
Diffstat (limited to 'target/linux/ar7-2.6/files/drivers/char/ar7_gpio.c')
| -rw-r--r-- | target/linux/ar7-2.6/files/drivers/char/ar7_gpio.c | 161 |
1 files changed, 0 insertions, 161 deletions
diff --git a/target/linux/ar7-2.6/files/drivers/char/ar7_gpio.c b/target/linux/ar7-2.6/files/drivers/char/ar7_gpio.c deleted file mode 100644 index a5245da35..000000000 --- a/target/linux/ar7-2.6/files/drivers/char/ar7_gpio.c +++ /dev/null @@ -1,161 +0,0 @@ -/* - * linux/drivers/char/ar7_gpio.c - * - * Copyright (C) 2007 OpenWrt.org - * - * 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 St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include <linux/device.h> -#include <linux/fs.h> -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/platform_device.h> -#include <asm/uaccess.h> -#include <asm/io.h> - -#include <linux/types.h> -#include <linux/cdev.h> -#include <gpio.h> - -#define DRVNAME "ar7_gpio" -#define LONGNAME "TI AR7 GPIOs Driver" - -MODULE_AUTHOR("Nicolas Thill <nico@openwrt.org>"); -MODULE_DESCRIPTION(LONGNAME); -MODULE_LICENSE("GPL"); - -static int ar7_gpio_major = 0; - -static ssize_t ar7_gpio_write(struct file *file, const char __user *buf, - size_t len, loff_t *ppos) -{ - int pin = iminor(file->f_dentry->d_inode); - size_t i; - - for (i = 0; i < len; ++i) { - char c; - if (get_user(c, buf + i)) - return -EFAULT; - switch (c) { - case '0': - gpio_set_value(pin, 0); - break; - case '1': - gpio_set_value(pin, 1); - break; - case 'd': - case 'D': - ar7_gpio_disable(pin); - break; - case 'e': - case 'E': - ar7_gpio_enable(pin); - break; - case 'i': - case 'I': - case '<': - gpio_direction_input(pin); - break; - case 'o': - case 'O': - case '>': - gpio_direction_output(pin); - break; - default: - return -EINVAL; - } - } - - return len; -} - -static ssize_t ar7_gpio_read(struct file *file, char __user * buf, - size_t len, loff_t * ppos) -{ - int pin = iminor(file->f_dentry->d_inode); - int value; - - value = gpio_get_value(pin); - if (put_user(value ? '1' : '0', buf)) - return -EFAULT; - - return 1; -} - -static int ar7_gpio_open(struct inode *inode, struct file *file) -{ - int m = iminor(inode); - - if (m >= AR7_GPIO_MAX) - return -EINVAL; - - return nonseekable_open(inode, file); -} - -static int ar7_gpio_release(struct inode *inode, struct file *file) -{ - return 0; -} - -static const struct file_operations ar7_gpio_fops = { - .owner = THIS_MODULE, - .write = ar7_gpio_write, - .read = ar7_gpio_read, - .open = ar7_gpio_open, - .release = ar7_gpio_release, - .llseek = no_llseek, -}; - -static struct platform_device *ar7_gpio_device; - -static int __init ar7_gpio_init(void) -{ - int rc; - - ar7_gpio_device = platform_device_alloc(DRVNAME, -1); - if (!ar7_gpio_device) - return -ENOMEM; - - rc = platform_device_add(ar7_gpio_device); - if (rc < 0) - goto out_put; - - rc = register_chrdev(ar7_gpio_major, DRVNAME, &ar7_gpio_fops); - if (rc < 0) - goto out_put; - - ar7_gpio_major = rc; - - rc = 0; - - goto out; - -out_put: - platform_device_put(ar7_gpio_device); -out: - return rc; -} - -static void __exit ar7_gpio_exit(void) -{ - unregister_chrdev(ar7_gpio_major, DRVNAME); - platform_device_unregister(ar7_gpio_device); -} - -module_init(ar7_gpio_init); -module_exit(ar7_gpio_exit); |