150 lines
3.3 KiB
C
150 lines
3.3 KiB
C
/*
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* motor.c - driver for motor Test
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*
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* Copyright (C) 2012 Loongson Corporation
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*
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* 2013-5-29
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/moduleparam.h>
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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 <linux/time.h>
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#define GPIORELAY1 64
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#define GPIORELAY2 65
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#define GPIORELAY3 66
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#define GPIORELAY4 87
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static int relay_open(struct inode *inode, struct file *file)
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{
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printk(KERN_ALERT"########relay open succesful#############\n");
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gpio_request(GPIORELAY1,"relay1");
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gpio_request(GPIORELAY2,"relay2");
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gpio_request(GPIORELAY3,"relay3");
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gpio_request(GPIORELAY4,"relay4");
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// gpio_direction_input(GPIOECHO);
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gpio_direction_output(GPIORELAY1,1);
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gpio_direction_output(GPIORELAY2,1);
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gpio_direction_output(GPIORELAY3,1);
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gpio_direction_output(GPIORELAY4,1);
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return 0;
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}
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static int relay_close(struct inode *inode, struct file *file)
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{
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gpio_free(GPIORELAY1);
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gpio_free(GPIORELAY2);
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gpio_free(GPIORELAY3);
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gpio_free(GPIORELAY4);
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printk(KERN_ALERT"########relay close succesful###########\n");
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return 0;
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}
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static ssize_t relay_read(struct file *file, char __user *buf, size_t count, loff_t *ptr)
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{
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/*
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unsigned int count=size;
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if(copy_to_user(buf,(void*)(relay),count));
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{
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return -EFAULT;
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}
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*/
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return 0;
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}
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static ssize_t relay_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 relay_ioctl( struct file *file, unsigned int cmd, unsigned long arg)
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{
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// printk(KERN_ALERT"in ioctl func!");
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switch(cmd){
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case 0:
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// printk(KERN_ALERT"in ioctl 0!\n");
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// gpio_direction_output(GPIORELAY2,arg);
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break;
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case 1:
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printk(KERN_ALERT"in ioctl 1!\n");
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gpio_direction_output(GPIORELAY1,arg);
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/*
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void __user *p=(void __user *)arg;
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relay();
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copy_to_user(p,send,sizeof(send));
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*/
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break;
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case 2:
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printk(KERN_ALERT"in ioctl 2!\n");
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gpio_direction_output(GPIORELAY2,arg);
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break;
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case 3:
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printk(KERN_ALERT"in ioctl 3!\n");
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gpio_direction_output(GPIORELAY3,arg);
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break;
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case 4:
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printk(KERN_ALERT"in ioctl 4!\n");
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gpio_direction_output(GPIORELAY4,arg);
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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 relay_ops = {
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.owner = THIS_MODULE,
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.open = relay_open,
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.release = relay_close,
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.read = relay_read,
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.write = relay_write,
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.unlocked_ioctl = relay_ioctl
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};
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static struct miscdevice relay_miscdev = {
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MISC_DYNAMIC_MINOR,
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"motor",
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&relay_ops,
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};
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static int __init relay_init(void)
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{
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if(misc_register(&relay_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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printk(KERN_ALERT"register succesful\n");
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return 0;
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}
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static void __exit relay_exit(void)
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{
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misc_deregister(&relay_miscdev);
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}
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module_init(relay_init);
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module_exit(relay_exit);
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MODULE_LICENSE("GPL");
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