一、開發環境
1、硬體平台：fs2410
2、主機：ubuntu 10.10
3、核心版本：linux 2.6.35
4、交叉編譯工具鏈：arm-none-linux-gnueabi-
二、詳細**
1、button_device.c（platform_device）
#include #include #include #include #include #include struct resource button_resource = ,
[1] = ,
[2] = ,
[3] = ,
[4] = ,
};struct platform_device button_device = ;
static int __init button_device_init(void)
static void __exit button_device_exit(void)
module_init(button_device_init);
module_exit(button_device_exit);
module_author("yhr");
module_license("gpl");
2、button_driver.c（platform_driver）
#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define extint0 *(volatile unsigned int *)s3c2410_extint0
#define extint1 *(volatile unsigned int *)s3c2410_extint1
#define extint2 *(volatile unsigned int *)s3c2410_extint2
static int button_major = 255;
struct button_dev
;struct button_irq_desc
;static struct button_irq_desc button_irqs =
, , , ,
};struct button_dev dev;
static volatile unsigned int *gpecon;
static volatile unsigned int *gpedat;
static volatile unsigned int *gpfcon;
static volatile unsigned int *gpfdat;
static volatile unsigned int *gpgcon;
static volatile unsigned int *gpgdat;
static void init_gpio(void)
extint0 = (extint0 & (~0x07)) + 0x02;
extint0 = (extint0 & (~(0x07 << 8))) + (0x02 << 8);
extint1 = (extint1 & (~(0x07 << 12))) + (0x02 << 12);
extint2 = (extint2 & (~(0x07 << 12))) + (0x02 << 12);
}static __inline unsigned char button_scan(int irq)
static irqreturn_t button_interrupt(int irq, void *dev_id)
static __inline void free_irqs(void)
return;
}static int button_open(struct inode *inode,struct file *filp)
static int button_release(struct inode *inode,struct file *filp)
static ssize_t button_read(struct file *filp, char *buf, size_t size, loff_t *ppos)
ret = size;
dev.key_value = 0;
return ret;
}static ssize_t button_write(struct file *filp, const char __user *buf, size_t size, loff_t *ppos)
static int button_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
static unsigned int button_poll(struct file *filp, poll_table *wait)
static struct file_operations button_fops =
;static void button_setup_cdev(struct cdev *dev, int index)
static int button_cdev_init(void)
if(result < 0)
return result;
printk("button_major : %d\n", button_major);
button_setup_cdev(&dev.cdev, 0);
init_waitqueue_head(&dev.r_wait);
return 0;
}void ioremap_gpio(struct resource *res)
static int button_probe(struct platform_device *pdev)
return 0;
}void iounmap_gpio(void)
static int button_remove(struct platform_device *pdev)
static struct platform_driver button_driver =
};static int __init button_init(void)
static void __exit button_exit(void)
module_init(button_init);
module_exit(button_exit);
module_author("yhr");
module_license("gpl");
ifeq ($(kernelrelease),)
# set your object kernel dir
kerneldir = /home/linux/linux-2.6.35
pwd := $(shell pwd)
modules:
$(make) -c $(kerneldir) m=$(pwd) modules
modules_install:
$(make) -c $(kerneldir) m=$(pwd) modules_install
clean:
rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions module* modules*
.phony: modules modules_install clean
else
obj-m := button_device.o button_driver.o
endif
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