gpio_step_motar.c.zip_gpc_ok6410

#include <linux/miscdevice.h> #include <linux/delay.h> #include <asm/irq.h> //#include <mach/regs-gpio.h> #include <mach/hardware.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/mm.h> #include <linux/fs.h> #include <linux/types.h> #include <linux/delay.h> #include <linux/moduleparam.h> #include <linux/slab.h> #include <linux/errno.h> #include <linux/ioctl.h> #include <linux/cdev.h> #include <linux/string.h> #include <linux/list.h> #include <linux/pci.h> #include <asm/uaccess.h> #include <asm/atomic.h> #include <asm/unistd.h> #include <mach/map.h> #include <mach/regs-clock.h> #include <mach/regs-gpio.h> #include <plat/gpio-cfg.h> //#include <mach/gpio-bank-e.h> #include <mach/gpio-bank-c.h> #define DEVICE_NAME "iogpc" //static long s3c6410_iogpc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) // device, open/close[0-1], portIndex[0-7] static long s3c6410_iogpc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { switch(cmd) { unsigned tmp; case 0: case 1: if (arg > 7) //max 7 { return -EINVAL; } tmp = readl(S3C64XX_GPCDAT);//用GPC端口SPIMOSI0/GPC2 if(cmd==0) //close light { tmp &= (~(1<<arg));//why << } else //open light { tmp |= (1<<arg); } writel(tmp,S3C64XX_GPCDAT); printk (DEVICE_NAME": %d %d\n", arg, cmd); return 0; default: return -EINVAL; } } static struct file_operations dev_fops = { .owner = THIS_MODULE, .unlocked_ioctl = s3c6410_iogpc_ioctl, }; static struct miscdevice misc = { .minor = MISC_DYNAMIC_MINOR, .name = DEVICE_NAME, .fops = &dev_fops, }; static int __init dev_init(void) { int ret; unsigned tmp; //gpc0-7 pull up tmp = readl(S3C64XX_GPCPUD);//GPCPUB 4bit*8port = 32 tmp &= (~0xFFFFFFFF); //11111111 11111111 tmp |= 0xAAAAAAAA; //10101010 10101010 writel(tmp,S3C64XX_GPCPUD); //gpc0-7 output mode tmp =readl(S3C64XX_GPCCON);//GPCCON 2bit*8port = 16 tmp &= (~0xFFFF); //11111111 11111111 tmp |= 0x1111; //00010001 00010001 writel(tmp,S3C64XX_GPCCON); //gpc0-7 output 0 tmp = __raw_readl(S3C64XX_GPCDAT);//GPCCON 1bit*8port = 8 //tmp &= (~0x0F); //00000000 11111111 // tmp |= 0x10; //00000000 00010000 tmp |= 0x00; //00000000 00010000 writel(tmp,S3C64XX_GPCDAT); ret = misc_register(&misc); printk (DEVICE_NAME"\tinitialized\n"); return ret; } static void __exit dev_exit(void) { misc_deregister(&misc); } module_init(dev_init); module_exit(dev_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("QHDZC Inc.");