rfid6-写成platform驱动
将前面rfid的misc挂到platform平台上，因为misc驱动都有了，所以很简单，代码复制过来就好了
设备侧就用上文的那个就好
http://download.csdn.net/detail/songqqnew/3716591
设备侧就用上文的那个就好
/******************platfrom_dev.c***************************/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/kernel.h>
#define DEVICE_NAME "song_rfid"
static struct platform_device *my_device;
static int __init my_init(void)
{
int ret=0;
my_device= platform_device_alloc(DEVICE_NAME,-1);//this name is matched for driver,song_rfid
ret=platform_device_add(my_device);
if (ret == 0) {
printk("Register %s\n",DEVICE_NAME);
} else {
printk("Register error.\n");
platform_device_put(my_device);
}
return ret;
}
static void __exit my_exit(void)
{
platform_device_unregister(my_device);
printk("Unregister %s\n",DEVICE_NAME);
}
module_init(my_init);
module_exit(my_exit);
MODULE_LICENSE("GPL");
MODULE_VERSION("1.5"); 驱动侧，就把misc驱动的init函数中实现的内容比如misc_register，射频初始化等放到platform的probe函数中即可#include "rc522.h"
#define DEVICE_NAME "rfid"
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/io.h>
#define DRIVER_NAME "song_rfid"
unsigned char LastKeyA[6]={0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};//NO.2卡
unsigned char NewKeyA[6]={0x19,0x84,0x07,0x15,0x76,0x14};//NO.2卡
unsigned char NewKey[16]={0x19,0x84,0x07,0x15,0x76,0x14,
0xff,0x07,0x80,0x69,
0x19,0x84,0x07,0x15,0x76,0x14};
unsigned char Read_Data[16]={0x00};
unsigned char Write_First_Data[16];
unsigned char Write_Consume_Data[16];
unsigned char RevBuffer[30];
unsigned char MLastSelectedSnr[4];
unsigned char oprationcard;
extern signed char PcdReset(void);
extern signed char PcdRequest(unsigned char req_code,unsigned char *pTagType);
extern void PcdAntennaOn(void);
extern void PcdAntennaOff(void);
extern signed char M500PcdConfigISOType(unsigned char type);
extern signed char PcdAnticoll(unsigned char *pSnr);
extern signed char PcdSelect(unsigned char *pSnr);
extern signed char PcdAuthState(unsigned char auth_mode,unsigned char addr,unsigned char *pKey,unsigned char *pSnr);
extern signed char PcdWrite(unsigned char addr,unsigned char *pData);
extern signed char PcdRead(unsigned char addr,unsigned char *pData);
extern signed char PcdHalt(void);
union flt_chr
{
//float flt;
int flt;
unsigned char chr[4];
}fltchr;
void delay_5ms(int x)
{
unsigned long j=jiffies+x*10;
while(jiffies<j) {;}
}
unsigned long rfid_table [] = {
S3C2410_GPF(0),//nss out
S3C2410_GPF(1),//sck out
S3C2410_GPF(2),//mosi out
S3C2410_GPF(3),//miso in
S3C2410_GPF(4),//rst out
};
unsigned int rfid_cfg_table [] = {
S3C2410_GPIO_OUTPUT,
S3C2410_GPIO_OUTPUT,
S3C2410_GPIO_OUTPUT,
S3C2410_GPIO_INPUT,
S3C2410_GPIO_OUTPUT,
};
int open_flag;
void InitRc522(void)
{
PcdReset();
PcdAntennaOff();
PcdAntennaOn();
M500PcdConfigISOType( 'A' );
}
void ctrlprocess(void)
{
char status;
int ii;
printk("\n");
printk("HZ=%d\n",HZ);
/**********************************************寻卡**************************************************************/
status=PcdRequest(PICC_REQIDL,&RevBuffer[0]);//寻天线区内未进入休眠状态的卡，返回卡片类型 2字节
if(status!=MI_OK)
{ printk("XXXXXXXXXXXXXXXX no card type\n");
return;
}
printk("*********** discard card typr\n");
/**********************************************返回序列号**************************************************************/
status=PcdAnticoll(&RevBuffer[2]);//防冲撞，返回卡的序列号 4字节
if(status!=MI_OK)
{
printk("XXXXXXXXXXXXXXXX no card serial num\n");
return;
}
printk("***********dicover card serial num\n");
memcpy(MLastSelectedSnr,&RevBuffer[2],4);
for(ii=0;ii<4;ii++)
{
printk("%x",(MLastSelectedSnr[ii]>>4)&0x0f);
printk("%x",MLastSelectedSnr[ii]&0x0f);
}
/**********************************************选卡**************************************************************/
memcpy(MLastSelectedSnr,&RevBuffer[2],4);
status=PcdSelect(MLastSelectedSnr);//选卡
if(status!=MI_OK)
{
printk("XXXXXXXXXXXXXXXX selected no card\n");
return;
}
printk("*********** selected card\n");
/**********************************************验证密码，扇区1，扇区1的控制块，地址为7********************************/
status=PcdAuthState(PICC_AUTHENT1A,7,NewKeyA,MLastSelectedSnr);
if(status!=MI_OK)
{ printk("XXXXXXXXXXXXXXXX not right password \n");
return;
}
printk("*********** right password\n");
status=PcdRead(4,Read_Data); //读卡 *********************************************************
if(status!=MI_OK)
{
printk("XXXXXXXXXXXXXXXX the first reading card failed\n");
return;
}
printk("*********** the first reading card success,as follows \n");
for(ii=0;ii<4;ii++)
{
fltchr.chr[ii]=Read_Data[ii];
printk("fltchr.chr[%d]=%x\n",ii,fltchr.chr[ii]);
}
printk("fltchr.flt=%d\n",fltchr.flt);
/**********************************************写卡，扇区1，扇区1的控第一个数据块，地址为4********************************/
//fltchr.flt=108;
fltchr.flt+=6;
printk("*********** write card with the data as follows \n");
printk("fltchr.flt=%d\n",fltchr.flt);
for(ii=0;ii<4;ii++)
{
Write_First_Data[ii]=fltchr.chr[ii];
printk("fltchr.chr[%d]=%x\n",ii,fltchr.chr[ii]);
}
for(ii=0;ii<4;ii++) printk("Write_First_Data[%d]=%x\n",ii,Write_First_Data[ii]);
status=PcdWrite(4,&Write_First_Data[0]); //写卡*********************************
if(status!=MI_OK)
{
printk("XXXXXXXXXXXXXXXX write to card failed \n") ;
printk("status=%d\n",status);
return;
}
printk("*********** write to card success with the data above\n") ;
status=PcdRead(4,Read_Data); //读卡 *********************************************************
if(status!=MI_OK)
{
printk("XXXXXXXXXXXXXXXX the first reading card failed\n");
return;
}
printk("*********** the second reading card success,as follows\n");
for(ii=0;ii<4;ii++)
{
fltchr.chr[ii]=Read_Data[ii];
printk("fltchr.chr[%d]=%x\n",ii,fltchr.chr[ii]);
}
printk("fltchr.flt=%d\n",fltchr.flt);
}
static ssize_t write_rfid(struct file *filp, const char *buffer, size_t count, loff_t *ppos)
{
int ret;
char *commad=0;
if (count == 0) {
return count;
}
commad=kmalloc(count+1,GFP_KERNEL);//need print it using %s, so plus 1 byte for '\0'
ret = copy_from_user(commad, buffer, count);//if success,ret=0
if (ret) {
return ret;
}
commad[count]='\0';
printk("from kernel commad=%s\n",commad);
printk("from kenel ret=%d\n",ret);
//to test the command "set to 1" or "clear to 0" if correct
if(strncmp(commad,"SET_SPI_CS",count)==0) {SET_SPI_CS;printk("excuting %s succes !\n",commad);}
if(strncmp(commad,"CLR_SPI_CS",count)==0) {CLR_SPI_CS;printk("excuting %s succes !\n",commad);}
if(strncmp(commad,"SET_SPI_CK",count)==0) {SET_SPI_CK;printk("excuting %s succes !\n",commad);}
if(strncmp(commad,"CLR_SPI_CK",count)==0) {CLR_SPI_CK;printk("excuting %s succes !\n",commad);}
if(strncmp(commad,"SET_SPI_MOSI",count)==0) {SET_SPI_MOSI;printk("excuting %s succes !\n",commad);}
if(strncmp(commad,"CLR_SPI_MOSI",count)==0) {CLR_SPI_MOSI;printk("excuting %s succes !\n",commad);}
if(strncmp(commad,"SET_RC522RST",count)==0) {SET_RC522RST;printk("excuting %s succes !\n",commad);}
if(strncmp(commad,"CLR_RC522RST",count)==0) {CLR_RC522RST;printk("excuting %s succes !\n",commad);}
kfree(commad);
return ret ? ret : count;
}
static ssize_t read_rfid(struct file *filp, char *buffer, size_t count, loff_t *ppos)
{ printk("read_rfid1\n");
ctrlprocess();
printk("read_rfid2\n");
return 0;
}
static int release_rfid(struct inode *inode, struct file *filp)
{
return 0;
}
static int open_rfid(struct inode *inode, struct file *filp)
{
open_flag=1;
printk("open_flag=%d\n",open_flag);
return 0;
}
static struct file_operations dev_fops = {
.owner = THIS_MODULE,
.open = open_rfid,
.read = read_rfid,
.write = write_rfid,
.release= release_rfid,
};
static struct miscdevice misc = {
.minor = MISC_DYNAMIC_MINOR,
.name = DEVICE_NAME,
.fops = &dev_fops,
};
/**************************** 以上属于misc ************************/
/**************************** 以下属于platform ************************/
/*在平台驱动probe函数中实现misc功能型驱动注册，及其他咚咚初始化*/
static int my_probe(struct platform_device *pdev)
{
int ret,i;
printk("driver find device : %s which can handle\n",DRIVER_NAME);
for (i = 0; i < 5; i++) {
s3c2410_gpio_cfgpin(rfid_table[i], rfid_cfg_table[i]);
s3c2410_gpio_setpin(rfid_table[i], 0);
}
ret = misc_register(&misc);
InitRc522() ;
printk (DEVICE_NAME"\tinitialized\n");
open_flag=0;
return ret;
}
/*在平台驱动remove函数中实现misc驱动的注销*/
static int my_remove(struct platform_device *pdev)
{
misc_deregister(&misc);
printk("driver found device : %s unpluged\n",DRIVER_NAME);
return 0;
}
static struct platform_driver my_driver = {
.probe = my_probe,
.remove = my_remove,
.driver = {
.owner = THIS_MODULE,
.name = DRIVER_NAME,//this name is matched for driver,song_rfid
},
};
/*在驱动入口函数init中实现平台驱动的注册*/
static int __init my_init(void)
{
printk("Register my_driver.\n");
return platform_driver_register(&my_driver);
}
/*在驱动注销函数中实现平台驱动的注销*/
static void __exit my_exit(void)
{
printk("Unregister my_driver.\n");
platform_driver_unregister(&my_driver);
}
module_init(my_init);
module_exit(my_exit);
MODULE_LICENSE("GPL");
[root@FriendlyARM plg]# insmod platform_dev.ko Register song_rfid [root@FriendlyARM plg]# insmod mymodule.ko //之后就会出现设备文件/dev/rfid Register my_driver. driver find device : song_rfid which can handle rfid initialized [root@FriendlyARM plg]# cat /dev/rfid open_flag=1 read_rfid1 HZ=200 rc522.c-PcdRequest: status = 0 *********** discard card typr ***********dicover card serial num ce1ed4c7*********** selected card *********** right password *********** the first reading card success,as follows fltchr.chr[0]=17 fltchr.chr[1]=0 fltchr.chr[2]=d5 fltchr.chr[3]=42 fltchr.flt=1121255447 *********** write card with the data as follows fltchr.flt=1121255453 fltchr.chr[0]=1d fltchr.chr[1]=0 fltchr.chr[2]=d5 fltchr.chr[3]=42 Write_First_Data[0]=1d Write_First_Data[1]=0 Write_First_Data[2]=d5 Write_First_Data[3]=42 *********** write to card success with the data above *********** the second reading card success,as follows fltchr.chr[0]=1d fltchr.chr[1]=0 fltchr.chr[2]=d5 fltchr.chr[3]=42 fltchr.flt=1121255453 read_rfid2 [root@FriendlyARM plg]#
http://download.csdn.net/detail/songqqnew/3716591
