关于S3C6410LED驱动出现的问题～求助！
下面是我的驱动程序，用ioctl方法写的！#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 <asm/io.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include "memdev.h"
#define DEVICE_NAME "leds"
MODULE_AUTHOR("chenggang");
MODULE_LICENSE("Dual BSD/GPL");
void *XIE_GPKCON;
void *XIE_GPKDAT;
static u32 GPKDAT_SAVE;
static u32 GPKCON_SAVE;
static void gpk_iomap(void)
{
XIE_GPBCON = ioremap(0x7F008800,0x4);
XIE_GPBDAT = ioremap(0x7F008808,0x4);
}
static void unmap_gpb(void)
{
iounmap(XIE_GPBCON);
iounmap(XIE_GPBDAT);
}
static void resave_led_reg(void)
{
__raw_writel(resave_gpbcon,R_GPBCON);
__raw_writel(resave_gpbdat,R_GPBDAT);
}
static int sbc6410_leds_ioctl(
struct inode *inode,
struct file *file,
unsigned int cmd,
unsigned long arg)
{
/* 检测命令的有效性 */
if (_IOC_TYPE(cmd) != MEMDEV_IOC_MAGIC)
return -EINVAL;
if (_IOC_NR(cmd) > MEMDEV_IOC_MAXNR)
return -EINVAL;
/* 根据命令，执行相应的操作 */
switch(cmd) {
u32 tmp;
case MEMDEV_IOCOFF:
tmp = __raw_readl(XIE_GPKDAT); //从内存映射的i/o空间读取32位数据
tmp &= ~(1 << (4 + arg));
tmp |= ( (!cmd) << (4 + arg) );
__raw_writel(tmp, XIE_GPKDAT); //向i/o地址写入32位数据
printk(KERN_INFO "turn off all light by xie\n");
return 0;
case MEMDEV_IOCON:
tmp = __raw_readl(XIE_GPKDAT);
tmp |= (0xF << 4);
__raw_writel(tmp, XIE_GPKDAT); //初始化数据寄存器
printk(KERN_INFO "turn on all light by xie\n");
return 0;
default:
return -EINVAL;
}
}
/*文件操作结构体*/
static struct file_operations dev_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = sbc6410_leds_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;
GPKCON_SAVE = _raw_readl(XIE_GPKCON);
GPKCON_SAVE = (GPKCON_SAVE & ~(0xffffU<<16))|(0x1111U<<16);
_raw_writel (GPKCON_SAVE, XIE_GPKCON); //初始化控制寄存器
GPKDAT_SAVE= readl(XIE_GPKDAT);
GPKDAT_SAVE|= (0xF << 4);
_raw_writel(GPKDAT_SAVE, XIE_GPKDAT); //初始化数据寄存器
/*注_册混杂型字符设备驱动*/
ret = misc_register(&misc);
printk (DEVICE_NAME"\tinitialized\n");
return ret;
}
static void __exit dev_exit(void)
{
/*注销混杂型字符设备驱动*/
misc_deregister(&misc);
resave_led_reg(void);
unmap_gpb(void);
}
module_init(dev_init);
module_exit(dev_exit);
MODULE_AUTHOR("David Xie");
MODULE_LICENSE("GPL");
***********************************************************************************
***********************************************************************************
下面是memdev.h文件
#ifndef _MEMDEV_H_
#define _MEMDEV_H_
#include <linux/ioctl.h>
/* 定义幻数 */
#define MEMDEV_IOC_MAGIC'k'
/* 定义命令 */
#define MEMDEV_IOCON _IO(MEMDEV_IOC_MAGIC, 1)
#define MEMDEV_IOCOFF _IO(MEMDEV_IOC_MAGIC, 2)
#define MEMDEV_IOC_MAXNR 2
#endif /* _MEMDEV_H_ */
**********************************************************************************
***********************************************************************************
在linux上 编译之后出现的情况是：
# make
make -C /home/smb/linux-2.6.38 M=/home/smb/S3C6410led modules ARCH=arm CROSS_COMPILE=arm-linux-
make: Entering directory `/home/smb/linux-2.6.38'
CC /home/smb/S3C6410led/mini6410_leds_misc.o
/home/smb/S3C6410led/mini6410_leds_misc.c:99:2: warning: initialization from incompatible pointer type
Building modules, stage 2.
MODPOST 1 modules
CC /home/smb/S3C6410led/mini6410_leds_misc.mod.o
LD /home/smb/S3C6410led/mini6410_leds_misc.ko
make: Leaving directory `/home/smb/linux-2.6.38'
说是源文件有指针出的不对～怎么会出现这样的警告呢！！这样当我下载到开发板上的时候，进行加载时就出现了如下的信息：
下面是超级终端出现的信息
# cd sdcard
# ls
FriendlyARM.ini images
app-led mini6410_leds_misc.ko
beifen mjpg-streamer-mini6410-bin.tar.gz
char_device www
high_char_device
# insmod mini6410_leds_misc.ko
les initialized
#
请问一下论坛的大侠了~~~小弟感激不尽！ 高手呀～小弟初学驱动，帮帮忙啦～～为啥这个驱动不行，用混杂驱动，ioctl方法，再将物理地址映射到虚拟地址里，这里有什么没有？？
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