/****************************************************************
 NAME: usbin.c
 DESC: usb bulk-IN operation
 HISTORY:
 Mar.25.2002:purnnamu: ported for S3C2410X.
 ****************************************************************/
#include <string.h>
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "def.h"

#include "2440usb.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 )	 
#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;



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 );
	SET_EP1_IN_PKT_READY();
}


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

	DbgPrintf( "<1:%x]" , in_csr1 );

	//I think that EPI_SENT_STALL will not be set to 1.
	if ( in_csr1 & EPI_SENT_STALL )
	{
		DbgPrintf( "[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 ); 

	transferIndex++;

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

	return;
}



void PrintEpiPkt( U8* pt , int cnt )
{
	int i;
	DbgPrintf( "[B_IN:%d:" , cnt );
	for ( i = 0; i < cnt; i++ )
		DbgPrintf( "%x," , pt[i] );
	DbgPrintf( "]" );
}