121 lines
2.2 KiB
C
121 lines
2.2 KiB
C
/*
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* gsc3280_gpioparal.c - driver for Gpio Test
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* 8bits out, 4bits in
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*
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* Copyright (C) 2012 Loongson Corporation
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*
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* 2013-03-15
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*/
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#include <linux/miscdevice.h>
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#include <linux/types.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/rcupdate.h>
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#include <linux/platform_device.h>
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#include <linux/cdev.h>
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#include <linux/slab.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/completion.h>
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#include <asm/io.h>
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#include <linux/fs.h>
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#include <linux/fcntl.h>
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#include <asm/uaccess.h>
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#include <linux/gpio.h>
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#include <gsc3280/gpio.h>
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#include <gsc3280/sysctl.h>
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#include <linux/time.h>
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#define GPIOLED3 31
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#define LED_ON 0
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#define LED_OFF 1
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static int sw_open(struct inode *inode, struct file *file)
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{
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//printk(KERN_ALERT"#####################sensor open ok!!!\n");
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printk(KERN_ALERT"open ok\n");
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//sysctl_iomux_disable(SYSCTL_IOMUX_SCI0);
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gpio_request(GPIOLED3,"GPIOLED3");
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gpio_direction_output(GPIOLED3,0);
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return 0;
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}
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static int sw_close(struct inode *inode, struct file *file)
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{
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gpio_free(GPIOLED3);
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return 0;
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}
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static ssize_t sw_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
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{
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return 0;
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}
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static ssize_t sw_write(struct file *file, const char __user *buf, size_t count, loff_t *ptr)
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{
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return 0;
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}
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static long sw_ioctl( struct file *file, unsigned int cmd, unsigned long arg)
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{
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switch(cmd){
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case LED_ON:{
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gpio_set_value(GPIOLED3, 1);
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}
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break;
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case LED_OFF:{
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gpio_set_value(GPIOLED3, 0);
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}
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break;
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default:
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printk(KERN_ALERT"in ioctl default!\n");
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}
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return 0;
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}
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static const struct file_operations sw_ops = {
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.owner = THIS_MODULE,
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.open = sw_open,
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.release = sw_close,
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.read = sw_read,
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.write = sw_write,
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.unlocked_ioctl = sw_ioctl
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};
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static struct miscdevice sw_miscdev = {
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MISC_DYNAMIC_MINOR,
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"led3",
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&sw_ops,
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};
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static int __init sw_init(void)
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{
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if (misc_register(&sw_miscdev))
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{
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printk(KERN_ALERT"###############: Couldn't register device 0, %d.\n", 255);
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return -EBUSY;
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}
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return 0;
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}
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static void __exit sw_exit(void)
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{
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misc_deregister(&sw_miscdev);
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}
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module_init(sw_init);
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module_exit(sw_exit);
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MODULE_LICENSE("GPL");
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