#include <linux/init.h>
#include <linux/module.h>
/*驱动注册的头文件，包含驱动的结构体和注册和卸载的函数*/
#include <linux/platform_device.h>
/*注册杂项设备头文件*/
#include <linux/miscdevice.h>
/*注册设备节点的文件结构体*/
#include <linux/fs.h>
/*Linux中申请GPIO的头文件*/
#include <linux/gpio.h>
/*三星平台的GPIO配置函数头文件*/
/*三星平台EXYNOS系列平台，GPIO配置参数宏定义头文件*/
#include <plat/gpio-cfg.h>
#include <mach/gpio.h>
/*三星平台4412平台，GPIO宏定义头文件*/
#include <mach/gpio-exynos4.h>
#define DRIVER_NAME "hello_ctl"
#define DEVICE_NAME "hello_gpio"
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("TOPEET");
/*led的两个IO，网络是KP_COL0，VDD50_EN*/
/*蜂鸣器的1个IO，网络是MOTOR_PWM*/
/*矩阵键盘的8个IO，网络是CHG_FLT，HOOK_DET，CHG_UOK，XEINT14_BAK，
GM_INT1，6260_GPIO1，CHG_COK，XEINT29/KP_ROW13/ALV_DBG25*/
/*摄像头的14个IO，网络是CAM_MCLK，CAM2M_RST，CAM2M_PWDN，
CAM_D5，CAM_D7，CAM_D6，CAM_D4，CAM_D3，CAM_D2，CAM_D1，
CAM_PCLK，CAM_D0，CAM_VSYNC，CAM_HREF。
I2C_SDA7，I2C_SCL7也是可以设置为GPIO，不过总线一般不要去动它*/
/*WIFI模块的7个IO，WIFI_D3，WIFI_CMD，WIFI_D1，WIFI_CLK，WIFI_D0，WIFI_D2，GPC1_1*/
/*串口RX和TX等也是可以设置为GPIO，一般不要动它*/
/*数组中有32个引出到端子或者模块的IO，还有类似sd卡等也是可以作为GPIO，
其它引到连接器但是没有使用的GPIO等等*/
/*SCP管脚编号和POP的稍微有点不同，下面是SCP的*/
static int led_gpios[] = {
EXYNOS4_GPL2(0),EXYNOS4_GPK1(1),
EXYNOS4_GPD0(0),
EXYNOS4_GPX1(0),EXYNOS4_GPX1(3),EXYNOS4_GPX1(5),EXYNOS4_GPX1(6),
EXYNOS4_GPX3(0),EXYNOS4_GPX2(6),EXYNOS4_GPX2(7),EXYNOS4_GPX3(5),
EXYNOS4212_GPJ1(3),EXYNOS4_GPL0(1),EXYNOS4_GPL0(3),EXYNOS4212_GPJ1(0),
EXYNOS4212_GPJ1(2),EXYNOS4212_GPJ1(1),EXYNOS4212_GPJ0(7),EXYNOS4212_GPJ0(6),
EXYNOS4212_GPJ0(5),EXYNOS4212_GPJ0(4),EXYNOS4212_GPJ0(0),EXYNOS4212_GPJ0(3),
EXYNOS4212_GPJ0(1),EXYNOS4212_GPJ0(2),
EXYNOS4_GPK3(6),EXYNOS4_GPK3(1),EXYNOS4_GPK3(4),EXYNOS4_GPK3(0),
EXYNOS4_GPK3(3),EXYNOS4_GPK3(5),EXYNOS4_GPC1(1),
};
#define LED_NUM ARRAY_SIZE(led_gpios)
static long hello_ioctl( struct file *files, unsigned int cmd, unsigned long arg){
printk("cmd is %d,arg is %d\n",cmd,arg);
switch(cmd)
{
case 0:
case 1:
if (arg > LED_NUM) {
return -EINVAL;
}
gpio_set_value(led_gpios[arg], cmd);
break;
default:
return -EINVAL;
}
gpio_set_value(led_gpios[2], 0);
return 0;
}
static int hello_release(struct inode *inode, struct file *file){
printk(KERN_EMERG "hello release\n");
return 0;
}
static int hello_open(struct inode *inode, struct file *file){
printk(KERN_EMERG "hello open\n");
return 0;
}
static struct file_operations hello_ops = {
.owner = THIS_MODULE,
.open = hello_open,
.release = hello_release,
.unlocked_ioctl = hello_ioctl,
};
static struct miscdevice hello_dev = {
.minor = MISC_DYNAMIC_MINOR,
.name = DEVICE_NAME,
.fops = &hello_ops,
};
static int hello_probe(struct platform_device *pdv){
int ret,i;
printk(KERN_EMERG "\tinitialized\n");
for(i=0; i<LED_NUM; i++)
{
ret = gpio_request(led_gpios[i], "LED");
if (ret) {
printk("%s: request GPIO %d for LED failed, ret = %d\n", DRIVER_NAME,
i, ret);
}
else{
s3c_gpio_cfgpin(led_gpios[i], S3C_GPIO_OUTPUT);
gpio_set_value(led_gpios[i], 1);
}
}
gpio_set_value(led_gpios[2], 0);
misc_register(&hello_dev);
if(ret<0)
{
printk("leds:register device failed!\n");
goto exit;
}
return 0;
exit:
misc_deregister(&hello_dev);
return ret;
return 0;
}
static int hello_remove(struct platform_device *pdv){
int i;
printk(KERN_EMERG "\tremove\n");
for(i=0; i<LED_NUM; i++)
{
gpio_free(led_gpios[i]);
}
misc_deregister(&hello_dev);
return 0;
}
static void hello_shutdown(struct platform_device *pdv){
;
}
static int hello_suspend(struct platform_device *pdv,pm_message_t pmt){
return 0;
}
static int hello_resume(struct platform_device *pdv){
return 0;
}
struct platform_driver hello_driver = {
.probe = hello_probe,
.remove = hello_remove,
.shutdown = hello_shutdown,
.suspend = hello_suspend,
.resume = hello_resume,
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
}
};
static int hello_init(void)
{
int DriverState;
printk(KERN_EMERG "HELLO WORLD enter!\n");
DriverState = platform_driver_register(&hello_driver);
printk(KERN_EMERG "\tDriverState is %d\n",DriverState);
return 0;
}
static void hello_exit(void)
{
printk(KERN_EMERG "HELLO WORLD exit!\n");
void free_irq(unsigned int irq,void *dev_id);
platform_driver_unregister(&hello_driver);
}
module_init(hello_init);
module_exit(hello_exit);
