led.zip_GM8180

#include <linux/module.h> #include <linux/config.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/spinlock.h> #include <linux/proc_fs.h> #include <linux/synclink.h> #include <asm/uaccess.h> #include <linux/miscdevice.h> #include <linux/slab.h> #include <asm/io.h> #include <linux/timer.h> #include <linux/delay.h> #include "led.h" MODULE_AUTHOR("zcy"); MODULE_LICENSE("GPL"); #define MAJOR_NUM 254 //主设备号 #define GPIOB_ADDR 0x99700000 #define ADDR_MFPSR5 0x98100000+0x114 struct gm_data{ unsigned long dataout; unsigned long datain; unsigned long pindir; }; struct gm_data *gm; void *ptr_ADDR_MFPSR5; struct timer_list my_timer; unsigned long parameter = 0; static int led_open(struct inode *, struct file *); static int led_release(struct inode *, struct file *); static int led_ioctl(struct inode *, struct file *, unsigned int, const int __user * ); static ssize_t led_write(struct file *,const int __user *,size_t ,loff_t *); struct file_operations led_fops = { .write=led_write, .open=led_open, .release=led_release, .ioctl=led_ioctl, }; static int led_open(struct inode *inode, struct file *filp) { return 0; } static int led_release(struct inode *inode, struct file *filp) { return 0; } static void my_function(unsigned long arg) { unsigned long temp; temp = gm->dataout; gm->dataout = temp & (~parameter); printk("my_function:gm->dataout=%lx\n",gm->dataout); } static void timer_func(void) { printk("entry timer\n"); init_timer(&my_timer);// 初始化定时器 my_timer.expires = get_jiffies_64() + HZ*1; // my_timer.data = 0; // my_timer.function = my_function; // add_timer(&my_timer); } static ssize_t led_write(struct file *filp,const int __user *buf,size_t len,loff_t *off) { int i; copy_from_user (&i, buf, sizeof(int)); switch(i) { case 0: parameter = 1; printk("parameter=%lx\n",parameter); break; //................................... case 1: parameter = 2; printk("parameter=%lx\n",parameter); break; case 2: parameter = 4; printk("parameter=%lx\n",parameter); break; case 3: parameter = 8; printk("parameter=%lx\n",parameter); break; } return 0; } static int led_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, const int __user *arg) { unsigned long temp; int i; copy_from_user (&i, arg, sizeof(int)); printk("i=%lx\n",i); printk("arg=%lx\n",*arg); switch(i) { case 0: parameter = 1; printk("parameter=%lx\n",parameter); break; //................................... case 1: parameter = 2; printk("parameter=%lx\n",parameter); break; case 2: parameter = 4; printk("parameter=%lx\n",parameter); break; case 3: parameter = 8; printk("parameter=%lx\n",parameter); break; } switch(cmd) { case led_on: temp = gm->dataout; gm->dataout = temp & (~parameter); break; case led_off: temp = gm->dataout; gm->dataout = temp | parameter;//................................................................ break; case led_blink: while(1) { temp = gm->dataout; gm->dataout = temp | parameter; printk("led_blink:gm->dataout=%lx\n",gm->dataout); timer_func(); } break; } return 0; } static int __init led_init(void) { int ret; unsigned long temp; //注册设备驱动 ret = register_chrdev(MAJOR_NUM, "led", &led_fops); if (ret) printk("led register failure"); else printk("led register success\n"); //将GPIOB[0]--[3]设置为输出状态 gm=(struct gm_data*)ioremap(GPIOB_ADDR, 3*8*sizeof(unsigned long)); temp = gm->pindir; gm->pindir = temp | 0xf; printk("led_init:gm->pindir=%lx\n",gm->pindir); //将管脚设置成GPIO(gpio2[0]--[3]) ptr_ADDR_MFPSR5 = ioremap(ADDR_MFPSR5, 8*sizeof(unsigned long)); temp = ioread32(ptr_ADDR_MFPSR5); temp = temp | 0x1540; iowrite32(temp, ptr_ADDR_MFPSR5); printk("led_init:ptr_ADDR_MFPSR5=%lx\n",temp); gm->dataout = 0xf; printk("led_init:gm->dataout=%lx\n",gm->dataout); printk("led_init:gm->datain=%lx\n",gm->datain); return ret; } static void __exit led_exit(void) { int ret; del_timer(&my_timer); iounmap(gm); iounmap(ptr_ADDR_MFPSR5); //注销设备驱动 ret = unregister_chrdev(MAJOR_NUM, "led"); if (ret) printk("3Gvar unregister failure"); else printk("3Gvar unregister success\n"); } module_init(led_init); module_exit(led_exit);