/* driver/char/led.c  *  this is a led char device driver.  * Any problem pls contact support@hhcn.com */#include <linux/module.h>#include <linux/fs.h>#include <linux/iobuf.h>#include <linux/major.h>#include <linux/blkdev.h>#include <linux/capability.h>#include <linux/smp_lock.h>#include <asm/uaccess.h>#include <asm/hardware.h>#include <asm/arch/cpu_s3c2410.h>#include <asm/io.h>#include <linux/vmalloc.h>#include <linux/config.h>#include <linux/init.h>#include <linux/slab.h>#include <linux/highmem.h>#include <linux/in.h>#include <linux/slab.h>#include <linux/errno.h>#include <linux/tqueue.h>#include <linux/wait.h>#include <linux/interrupt.h>#include <asm/irq.h>#include <linux/delay.h>#ifdef CONFIG_DEVFS_FS#include <linux/devfs_fs_kernel.h>#endif//#include "rf905_ioctl.h"#define RF905_MAJOR 139#define U8 unsigned char//#define U32 unsigned int/*SPI registers*/#define rSPCON0 (*(volatile unsigned long *)r_SPCON0)   /*SPI control Register*/#define rSPSTA0 (*(volatile unsigned long *)r_SPSTA0)   /*SPI status Register*/#define rSPPIN0 (*(volatile unsigned long *)r_SPPIN0)   /* SPI pin control Register*/#define rSPPRE0 (*(volatile unsigned long *)r_SPPRE0)  /*SPI Baud Rate Prescaler Register */#define rSPTDAT0 (*(volatile unsigned long *)r_SPTDAT0) /*SPI Tx Data Register*/#define rSPRDAT0 (*(volatile unsigned long *)r_SPRDAT0) /*SPI Rx Data Register*//*I/O registers*/#define rGPECON (*(volatile unsigned long *)r_GPECON) /*Configure the pins of port E*/#define rGPEUP  (*(volatile unsigned long *)r_GPEUP)  /*Pull-up disable register for port E*/#define rGPBCON (*(volatile unsigned long *)r_GPBCON)    /*Configure the pins of port B*/#define rGPBUP  (*(volatile unsigned long *)r_GPBUP)     /*Pull-up disable register for port B*/#define rGPBDAT (*(volatile unsigned long *)r_GPBDAT)     /*The data register for port B*/#define rGPCCON (*(volatile unsigned long *)r_GPCCON)    /*Configure the pins of port G*/#define rGPCUP  (*(volatile unsigned long *)r_GPCUP)     /*Pull-up disable register for port G*/#define rGPCDAT (*(volatile unsigned long *)r_GPCDAT)     /*The data register for port G*/unsigned long r_SPCON0,r_SPSTA0,r_SPPIN0,r_SPPRE0,r_SPTDAT0,r_SPRDAT0;unsigned long r_GPECON,r_GPEUP;unsigned long r_GPBCON,r_GPBUP,r_GPBDAT;unsigned long r_GPCCON,r_GPCUP,r_GPCDAT;/**********************************************************//*-----------------------------------------------         nrf905命令控制字 ------------------------------------------------*/ #define WC        0x00            // Write configuration register command #define RC        0x10            // Read  configuration register command #define WTP       0x20            // Write TX Payload  command #define RTP       0x21            // Read  TX Payload  command #define WTA       0x22            // Write TX Address  command #define RTA       0x23            // Read  TX Address  command #define RRP       0x24            // Read  RX Payload  command /********************************************************************************************/devfs_handle_t devfs_rf905;int	rf905_open(struct inode *, struct file *);int	rf905_release(struct inode *, struct file *);//int     rf905_ioctl(struct inode *, struct file *, unsigned int, unsigned long);//ssize_t rf905_read(struct file *, char * , size_t );ssize_t rf905_write(struct file *, char * , size_t );static void spi_poll_done(void);void spi_tx_data(U8 data);void send_data(U8 data);void init_rf905(void);void Init_SPI(void);/************************************************************************************//*                                                                                  *//************************************************************************************/static struct file_operations rf905_fops = {	open:		rf906_open,//read:		rf905_read,	write:	    rf905_write,//   ioctl:   rf905_ioctl,	release:	rf905_release,};int rf905_open(struct inode *inode, struct file *filp){   // Init_SPI(void);	init_rf905(void);    	printk("open ok\n");	return 0;}/*ssize_t rf905_read(struct file *fp, char * buf,                 size_t size){    return 1;}*/ssize_t rf905_write(struct file *fp, char * buf,                 size_t size){ 	char  data;    unsigned long i;	rGPBDAT |=0x400;  	udelay(80);    rGPBDAT &=(~0x400);                //select the chip    udelay(1000);   	spi_tx_data(WTP);                 //write rf905 tx data	for(i=0;i<32;i++) 	{if (get_user(data, buf+i))		{   printk("tx data to rf905 error");			return -EFAULT;		}	 spi_tx_data(data);    //0    }        rGPBDAT |=0x400;               //Unselect the chip    rGPBDAT |=0x203;               //Unselect the chip     udelay(700);	for(;i<1;)	{   udelay(100);	    i =rGPCDAT;		i =i&0x40;		i =i/0x40;		}   /*     i=rGPBDAT;        if()	*/    return 1;}int rf905_release(struct inode *inode, struct file *filp){    rGPBDAT &= (~0x400);   //chip_select disable    rGPBDAT |=0x400;              	printk("release ok\n");	return 0;}/*int rf905_ioctl(struct inode *inode,		        struct file *flip,		        unsigned int command,		        unsigned long arg){	   int err = 0;	   switch (command) {   			case 				break;			case ; 	      			break;			case ; 	      			break;			case 	      			break;			case 	      			break;			case 	      			break;			default:				err = -EINVAL;	}               return err;}*//***********************************************************************************************//*                       子程序                                                                *//***********************************************************************************************//**********************************************************///Initialize 2410 spivoid Init_SPI(void){	int i;       rSPPRE0 = 0xff;  //2410 SPI_BAUD;        rSPCON0 = 0x18;  //polling mode is used here!       for(i = 0 ; i < 10 ; i++)       {    	    rSPTDAT0 = 0xff;       }       rGPECON |=   0x0a800000;       rGPECON &= (~0x05400000);       rGPEUP |= 0x3800;       //GPB10----->CS       rGPBDAT |=0x400;                //Unselect the chip		spi_tx_data(0xff);		spi_tx_data(0xff);		spi_tx_data(0xff);	    spi_tx_data(0xff);		spi_tx_data(0xff);	    spi_tx_data(0xff);	    spi_tx_data(0xff);		spi_tx_data(0xff);	    spi_tx_data(0xff);	    spi_tx_data(0xff);}/*******************************************************************************/void init_rf905(void){  rGPBDAT &=(~0x2);               //  rGPBDAT |=0x201;               //   standby model  udelay(3000);  rGPBDAT &=(~0x400);                //select the chip    udelay(10000);     spi_tx_data(WC);  spi_tx_data(0xff);    //0  spi_tx_data(0x0d);    //1  spi_tx_data(0x24);    //2  spi_tx_data(0x20);    //3  spi_tx_data(0x20);    //4  spi_tx_data(0x0);     //5  spi_tx_data(0xec);    //6  spi_tx_data(0xec);    //7  spi_tx_data(0xec);    //8  spi_tx_data(0x5b);    //9  rGPBDAT |=0x400;               //Unselect the chip  udelay(1000);  rGPBDAT |=0x400;                //select the chip    udelay(10000);  spi_tx_data(WTA);    //  spi_tx_data(0x0);    //0  spi_tx_data(0xC8);    //0  spi_tx_data(0xC8);    //0  spi_tx_data(0xC8);    //0   rGPBDAT |=0x400;               //Unselect the chip}/*******************************************************************************/void send_data(U8 data){     rGPBDAT &=(~0x400);                //select the chip    udelay(40000);		spi_tx_data(data);		rGPBDAT |=0x400;               //Unselect the chip}/**********************************************************///To polling when SPI transfer is not finishedstatic void spi_poll_done(void){	int nCount=0;        	while(!(rSPSTA0 & 0x01) )	{                nCount++;                if(nCount>=5000)		{		   printk("SPI state poll failed\n");                   break;                }   	}//endwhile	}/**********************************************************///Transmit datavoid spi_tx_data(U8 data){	 	spi_poll_done();        rSPTDAT0 = data;	//transmit data        spi_poll_done();	}/**********************************************************//*************************************************************************************************//*                                                                                               *//*************************************************************************************************/int __init rf905_init(void){	printk("*********************rf905_init**************\n");		devfs_rf905 = devfs_register(NULL, "rf905", DEVFS_FL_DEFAULT,RF905_MAJOR, 0,	             S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,	             &rf905_fops, NULL);	  	//SPI registers        r_SPCON0 = ioremap(0x59000000,4);        r_SPSTA0 = ioremap(0x59000004,4);        r_SPPIN0 = ioremap(0x59000008,4);        r_SPPRE0 =  ioremap(0x5900000C,4);        r_SPTDAT0 = ioremap(0x59000010,4);        r_SPRDAT0 = ioremap(0x59000014,4);	//I/O registers	    r_GPECON  = ioremap(0x56000040,4);		r_GPEUP   = ioremap(0x56000048,4);		r_GPBCON  = ioremap(0x56000010,4);		r_GPBUP   = ioremap(0x56000018,4);		r_GPBDAT  = ioremap(0x56000014,4);		r_GPCCON  = ioremap(0x56000020,4);		r_GPCUP   = ioremap(0x56000028,4);		r_GPCDAT  = ioremap(0x56000024,4);	//set io register          rGPBCON |= 0x140005;        rGPBCON &= (~0x28000a);        rGPBUP  |=0x403;        rGPCCON &= (~0x3000);        rGPCUP  |=0x40;         Init_SPI();     //////    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);    spi_tx_data(0xff);	return 0;}static void __exit rf905_exit(void){	devfs_unregister(devfs_rf905);}module_init(rf905_init);module_exit(rf905_exit);