usbin.c

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/*********************************************************************************************
* File:		usbin.c
* Author:	embest
* Desc:		usb bulk-IN operation
* History:	
*			R.X.Huang, March 12, 2005
*				Programming modify, style of the program: nomenclature, commentary
*			Y.J.Guo, April 28, 2005
*				Modifying and reusing  of S3C2410X u24xmon
*********************************************************************************************/

/*------------------------------------------------------------------------------------------*/
/*                                     include files	                                    */
/*------------------------------------------------------------------------------------------*/
#include <string.h>

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

/*------------------------------------------------------------------------------------------*/
/*                                     constants define                                     */
/*------------------------------------------------------------------------------------------*/
// 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 )	 
#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) )

/*------------------------------------------------------------------------------------------*/
/*                                     global variables                                     */
/*------------------------------------------------------------------------------------------*/
static void PrintEpiPkt(UINT8T *pt,int cnt);

// Prepare the code for the packit size constraint!!!
// EP1 = IN end point. 
UINT8T ep1Buf[EP1_PKT_SIZE];
int transferIndex=0;

/*********************************************************************************************
* name:		PrepareEp1Fifo
* func:		PrepareEp1Fifo
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void PrepareEp1Fifo(void) 
{
    int i;
    UINT8T in_csr1;
    rINDEX_REG=1;
    in_csr1=rIN_CSR1_REG;
    
    for(i=0;i<EP1_PKT_SIZE;i++)ep1Buf[i]=(UINT8T)(transferIndex+i);
    WrPktEp1(ep1Buf,EP1_PKT_SIZE);
    SET_EP1_IN_PKT_READY(); 
}

/*********************************************************************************************
* name:		Ep1Handler
* func:		Ep1Handler
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void Ep1Handler(void)
{
    UINT8T in_csr1;
//    int i;
    rINDEX_REG=1;
    in_csr1=rIN_CSR1_REG;
    
   // uart_printf(" <1:%x]",in_csr1);		//by lht

    //I think that EPI_SENT_STALL will not be set to 1.
    if(in_csr1 & EPI_SENT_STALL)
    {   
   //	uart_printf(" [STALL]");
   	CLR_EP1_SENT_STALL();
   	return;
   }	
										
    //IN_PKT_READY is cleared
    //The data transfered was ep1Buf[] which was already configured 
    //PrintEpiPkt(ep1Buf,EP1_PKT_SIZE);    //by lht
    
    transferIndex++;

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

    return;
}

/*********************************************************************************************
* name:		PrintEpiPkt
* func:		PrintEpiPkt
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void PrintEpiPkt(UINT8T *pt,int cnt)
{
    int i;
   uart_printf(" [B_IN:%d:",cnt);	  //by lht
    for(i=0;i<cnt;i++)
    	uart_printf(" %x,",pt[i]);
    uart_printf(" ]");
}