usbin.c

基于arm9的,usb设备(u盘)的读写操作实现.

/****************************************************************
 NAME: usbin.c
 DESC: usb bulk-IN operation
 HISTORY:
 Mar.25.2002:purnnamu: ported for S3C2410X.
 ****************************************************************/
#include <string.h>
#include "option.h"
#include "2410addr.h"
#include "2410lib.h"
#include "def.h"

#include "2410usb.h"
#include "usbmain.h"
#include "usb.h"
#include "usblib.h"
#include "usbsetup.h"
#include "usbin.h"



//static void PrintEpiPkt(U8 *pt,int cnt);


// ===================================================================
// All following commands will operate in case 
// - in_csr1 is valid.
// ===================================================================

#define SET_EP1_IN_PKT_READY()  rIN_CSR1_REG= ( in_csr1 &(~ EPI_WR_BITS)\
					| EPI_IN_PKT_READY ) //IN_CSR1_REG=0x01
#define SET_EP1_SEND_STALL()	rIN_CSR1_REG= ( in_csr1 & (~EPI_WR_BITS)\
					| EPI_SEND_STALL) )
#define CLR_EP1_SENT_STALL()	rIN_CSR1_REG= ( in_csr1 & (~EPI_WR_BITS)\
					&(~EPI_SENT_STALL) )
#define FLUSH_EP1_FIFO() 	rIN_CSR1_REG= ( in_csr1 & (~EPI_WR_BITS)\
					| EPI_FIFO_FLUSH) )


// ***************************
// *** VERY IMPORTANT NOTE ***
// ***************************
// Prepare the code for the packit size constraint!!!

// EP1 = IN end point. 

U8 ep1Buf[EP1_PKT_SIZE];
int transferIndex=0;

#ifdef _FOR_UDISK_
extern U8 CBW_flg;
void PrepareEp1Fifo_1(U8 * buffer,U8 len) 
{
	U8 length=len;
    	U8 in_csr1 = 0;
    	rINDEX_REG=1;

   	if(length>EP1_PKT_SIZE) 
   		length = EP1_PKT_SIZE;
     	WrPktEp1(buffer,length);

	if(length<EP1_PKT_SIZE) 
	{
   		SET_EP1_IN_PKT_READY();//IN_CSR1_REG=0x01
	}
}
#endif


void PrepareEp1Fifo(void) 
{
    	int i;
    	U8 in_csr1;
    	rINDEX_REG=1;
    	in_csr1=rIN_CSR1_REG;
    
    	for(i=0;i<EP1_PKT_SIZE;i++)ep1Buf[i]=(U8)(transferIndex+i);
    	WrPktEp1(ep1Buf,EP1_PKT_SIZE);//Write data (byte) to EP1 FIFO from ep1Buf[]
    	SET_EP1_IN_PKT_READY();//IN_CSR1_REG=0x01
}

void Ep1Handler(void)
{
    	U8 in_csr1;
    	int i;
    	rINDEX_REG=1;
    	in_csr1=rIN_CSR1_REG;

    //I think that EPI_SENT_STALL will not be set to 1.
    	if(in_csr1 & EPI_SENT_STALL)
    	{   
	   	Uart_Printf("EP1 IN SENT STALL!\n");
	   	CLR_EP1_SENT_STALL();
   		return;
    	}
#ifdef _FOR_UDISK_
	if(USBD_flg==0)
	{
		transferIndex++;
    		PrepareEp1Fifo(); 
	}
	else if(USBD_flg==1)
	{
		CBW_flg = 3;
		Mass_acces();
	}
#else
    //IN_PKT_READY is cleared
    
    //The data transfered was ep1Buf[] which was already configured 

    //PrintEpiPkt(ep1Buf,EP1_PKT_SIZE); 
    
    	transferIndex++;

    	PrepareEp1Fifo(); 
    //IN_PKT_READY is set   
    //This packit will be used for next IN packit.	
#endif
    return;
}