126 lines
2.6 KiB
C
126 lines
2.6 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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#include<linux/ioctl.h>
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#define SYSCTL_MOD_CTL0 (volatile unsigned int *)0xBC04A008
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#define SYSCTL_MOD_CTL1 (volatile unsigned int *)0xBC04A00C
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#define SYSCTL_IOMUX_CFG0 (volatile unsigned int *)0xBC04A0B0
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#define SYSCTL_IOMUX_CFG1 (volatile unsigned int *)0xBC04A0B4
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#define GPIO79 79
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#define MEMDEV_IOC_MAGIC 'k'
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#define GPIO79_HI _IO(MEMDEV_IOC_MAGIC,1)
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#define GPIO79_LO _IO(MEMDEV_IOC_MAGIC,2)
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//gpio初始化
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void ant_gpio_init(void)
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{
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//GPIO模块使能
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writel(readl(SYSCTL_MOD_CTL0) | (1<<27), SYSCTL_MOD_CTL0);
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gpio_request(GPIO79, "GPIO79");
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gpio_direction_output(GPIO79,1);
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}
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static int ant_open(struct inode *inode, struct file *file)
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{
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printk(KERN_ALERT"GPIO OPEN OK\n");
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return 0;
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}
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static int ant_close(struct inode *inode, struct file *file)
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{
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return 0;
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}
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static ssize_t ant_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 long ant_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
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{
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//int ret = 0;
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switch(cmd)
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{
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case GPIO79_HI:
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gpio_set_value(GPIO79,1);
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break;
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case GPIO79_LO:
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gpio_set_value(GPIO79,0);
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break;
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default:
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printk(KERN_ALERT"cmd error!\n");
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return -EINVAL;
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}
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return -1;
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}
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static const struct file_operations ant_ops = {
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.owner = THIS_MODULE,
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.open = ant_open,
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.release = ant_close,
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.read = ant_read,
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.unlocked_ioctl = ant_ioctl,
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};
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static struct miscdevice ant_miscdev = {
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.minor = MISC_DYNAMIC_MINOR,
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.name = "ant_gpio",
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.fops = &ant_ops,
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};
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static int __init ant_init(void)
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{
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ant_gpio_init();
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if (misc_register(&ant_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 ant_exit(void)
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{
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misc_deregister(&ant_miscdev);
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}
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module_init(ant_init);
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module_exit(ant_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Linss");
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