/****************************************************************
 NAME: usblib.c
 DESC: S3C2440A USB library functions
 HISTORY:
 Mar.25.2002:purnnamu: ported for S3C2440A.
 Mar.27.2002:purnnamu: DMA is enabled.
 ****************************************************************/
#include "def.h"
#include "2440addr.h"

#include "2440usb.h"
#include "usblib.h"
#include "usbsetup.h"
#include "usbout.h"
#include "usbin.h"
#include "dma.h"
#define	USB_DOWNLOAD_SUPPORT
#ifdef	USB_DOWNLOAD_SUPPORT

#define	USB_DOWN_DEV	0x200
#define	USB_DOWN_ATTR	((USB_DOWN_DEV<<16)|SRC_LOC_APB|SRC_ADDR_FIXED|DST_LOC_AHB|DST_ADDR_INC|REQ_USB_EP3)
#if USBDMA_DEMAND
#define	USB_DOWN_MODE	(DEMAND_MODE|SYNC_APB|DONE_GEN_INT|TSZ_UNIT|SINGLE_SVC|HW_TRIG|RELOAD_OFF|DSZ_8b)
#else
#define	USB_DOWN_MODE	(HANDSHAKE_MODE|SYNC_APB|DONE_GEN_INT|TSZ_UNIT|SINGLE_SVC|HW_TRIG|RELOAD_OFF|DSZ_8b)
#endif

U32 UsbDevReq;
/*
void ConfigUsbd(void)
{

    ReconfigUsbd();

//	pISR_USBD =(unsigned)IsrUsbd;
//	ClearPending(BIT_USBD);
//	EnableIrq(BIT_USBD);      
}
*/

void ReconfigUsbd(void)
{
// *** End point information ***
//   EP0: control
//   EP1: bulk in end point
//   EP2: not used
//   EP3: bulk out end point
//   EP4: not used
    
    rPWR_REG=PWR_REG_DEFAULT_VALUE;	//disable suspend mode

    rINDEX_REG=0;//對EP0有關的寄存器進行操作	
    rMAXP_REG=FIFO_SIZE_8;   	//EP0 max packit size = 8 
    rEP0_CSR=EP0_SERVICED_OUT_PKT_RDY|EP0_SERVICED_SETUP_END;	
 				//EP0:clear OUT_PKT_RDY & SETUP_END
    rINDEX_REG=1;//對EP1有關的寄存器進行操作
    #if (EP1_PKT_SIZE==32)
        rMAXP_REG=FIFO_SIZE_32;	//EP1:max packit size = 32
    #else
	rMAXP_REG=FIFO_SIZE_64;	//EP1:max packit size = 64
    #endif	
    rIN_CSR1_REG=EPI_FIFO_FLUSH|EPI_CDT;//沖掉FIFO中的數據，數據包中的PID保持DATA0	
    rIN_CSR2_REG=EPI_MODE_IN|EPI_IN_DMA_INT_MASK|EPI_BULK; //IN模式,禁止DMA中斷，批量傳輸模式     
    rOUT_CSR1_REG=EPO_CDT;//數據切換序列位復位到DATA0   	
    rOUT_CSR2_REG=EPO_BULK|EPO_OUT_DMA_INT_MASK; //端點配置成BULK模式，禁止中斷  	

    rINDEX_REG=2;
    rMAXP_REG=FIFO_SIZE_64;	//EP2:max packit size = 64
    rIN_CSR1_REG=EPI_FIFO_FLUSH|EPI_CDT|EPI_BULK;		//EPI_BULK in IN_CSR1???
    rIN_CSR2_REG=EPI_MODE_IN|EPI_IN_DMA_INT_MASK; //IN mode, IN_DMA_INT=masked, disable interrupt    
    rOUT_CSR1_REG=EPO_CDT;   	
    rOUT_CSR2_REG=EPO_BULK|EPO_OUT_DMA_INT_MASK;   	

    rINDEX_REG=3;
    #if (EP3_PKT_SIZE==32)
        rMAXP_REG=FIFO_SIZE_32;	//EP3:max packit size = 32
    #else
	rMAXP_REG=FIFO_SIZE_64;	//EP3:max packit size = 64
    #endif	
    rIN_CSR1_REG=EPI_FIFO_FLUSH|EPI_CDT|EPI_BULK;//沖掉FIFO中的數據，數據包中的PID保持DATA0
    rIN_CSR2_REG=EPI_MODE_OUT|EPI_IN_DMA_INT_MASK; //OUT模式,禁止DMA中斷     
    rOUT_CSR1_REG=EPO_CDT;   	
    	//clear OUT_PKT_RDY, data_toggle_bit.
	//The data toggle bit should be cleared when initialization.
    rOUT_CSR2_REG=EPO_BULK|EPO_OUT_DMA_INT_MASK; //端點配置成BULK模式，禁止中斷  	

    rINDEX_REG=4;
    rMAXP_REG=FIFO_SIZE_64;	//EP4:max packit size = 64
    rIN_CSR1_REG=EPI_FIFO_FLUSH|EPI_CDT|EPI_BULK;
    rIN_CSR2_REG=EPI_MODE_OUT|EPI_IN_DMA_INT_MASK; //OUT mode, IN_DMA_INT=masked    
    rOUT_CSR1_REG=EPO_CDT;   	
    	//clear OUT_PKT_RDY, data_toggle_bit.
	//The data toggle bit should be cleared when initialization.
    rOUT_CSR2_REG=EPO_BULK|EPO_OUT_DMA_INT_MASK;   	
    
    rEP_INT_REG=EP0_INT|EP1_INT|EP2_INT|EP3_INT|EP4_INT;//清除所有端點的中斷
    rUSB_INT_REG=RESET_INT|SUSPEND_INT|RESUME_INT; //清零USB中斷寄存器
    	//Clear all usbd pending bits
    	
    //EP0,1,3 & reset interrupt are enabled
    rEP_INT_EN_REG=EP0_INT|EP1_INT|EP3_INT;//使能EP0，EP1，EP3中斷
    rUSB_INT_EN_REG=RESET_INT;//使能復位中斷
    ep0State=EP0_STATE_INIT;//置EP0為初始狀態
    
}

//讀Ep0數據包
void RdPktEp0(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        buf[i]=(U8)rEP0_FIFO;	
    }
}
    
//寫Ep0數據包
void WrPktEp0(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        rEP0_FIFO=buf[i];	
    }
}

//寫Ep1數據包
void WrPktEp1(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        rEP1_FIFO=buf[i];	
    }
}

//寫Ep2數據包
void WrPktEp2(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        rEP2_FIFO=buf[i];	
    }
}

//讀Ep3數據包
void RdPktEp3(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        buf[i]=(U8)rEP3_FIFO;	
    }
}

//讀Ep4數據包
void RdPktEp4(U8 *buf,int num)
{
    int i;
    	
    for(i=0;i<num;i++)
    {
        buf[i]=(U8)rEP4_FIFO;	
    }
}


void ReConfigEp3Dma(U32 bufAddr, U32 count)
{
    SetDMARun(UsbDevReq|DMA_START, ADDR_EP3_FIFO, bufAddr, count); 
}

//配置斷點3的DMA工作方式
void ConfigEp3DmaMode(U32 bufAddr,U32 count)
{ 

	count=count&0xfffff; //transfer size should be <1MB        
    
	UsbDevReq = RequestDMA(USB_DOWN_ATTR, USB_DOWN_MODE);
	if(UsbDevReq==REQUEST_DMA_FAIL)
	{
		DbgOut("Request DMA fail!\n");
		return;
	}		
	pISR_DMA2 =(unsigned)IsrDma2;
	ClearPending(BIT_DMA2);	
	EnableIrq(BIT_DMA2);	
	SetDMARun(UsbDevReq|DMA_START, ADDR_EP3_FIFO, bufAddr, count);	
	
/* 
    rDISRCC2=(1<<1)|(1<<0);
    rDISRC2=ADDR_EP3_FIFO; //src=APB,fixed,src=EP3_FIFO 
    rDIDSTC2=(0<<1)|(0<<0);
    rDIDST2=bufAddr;       //dst=AHB,increase,dst=bufAddr
#if USBDMA_DEMAND
    rDCON2=(count)|(0<<31)|(0<<30)|(1<<29)|(0<<28)|(0<<27)|(4<<24)|(1<<23)|(1<<22)|(0<<20); 
        //demand,requestor=APB,CURR_TC int enable,unit transfer,
        //single service,src=USBD,H/W request,autoreload,byte,CURR_TC
#else
    rDCON2=(count)|(1<<31)|(0<<30)|(1<<29)|(0<<28)|(0<<27)|(4<<24)|(1<<23)|(1<<22)|(0<<20); 
        //handshake,requestor=APB,CURR_TC int enable,unit transfer,
        //single service,src=USBD,H/W request,autoreload,byte,CURR_TC
#endif        
    rDMASKTRIG2= (1<<1); 
		//DMA 2 on
*/
	rINDEX_REG=3;
	
//	rEP3_DMA_FIFO=EP3_PKT_SIZE; //not needed for OUT operation. 	

    rEP3_DMA_TTC_L=0xff;
    rEP3_DMA_TTC_M=0xff;
    rEP3_DMA_TTC_H=0x0f;

    rOUT_CSR2_REG=rOUT_CSR2_REG|EPO_AUTO_CLR|EPO_OUT_DMA_INT_MASK; 
	//AUTO_CLR(OUT_PKT_READY is cleared automatically), interrupt_masking.
#if USBDMA_DEMAND
	rEP3_DMA_UNIT=EP3_PKT_SIZE; //DMA transfer unit=64 bytes
	rEP3_DMA_CON=UDMA_DEMAND_MODE|UDMA_OUT_DMA_RUN|UDMA_DMA_MODE_EN; 
	//deamnd enable,out_dma_run=run,in_dma_run=stop,DMA mode enable
#else        
	rEP3_DMA_UNIT=0x01; //DMA transfer unit=1byte
	rEP3_DMA_CON=UDMA_OUT_DMA_RUN|UDMA_DMA_MODE_EN;
	//deamnd disable,out_dma_run=run,in_dma_run=stop,DMA mode enable
#endif  
	
	//wait until DMA_CON is effective.
	{
		register i = rEP3_DMA_CON;
		for(i=0;i<10;i++);
	}    	
}

//配置斷點3的irq中斷工作方式
void ConfigEp3IntMode(void)
{
	ReleaseDMA(UsbDevReq);	//release and stop dma
    
    rINDEX_REG=3;    
    rOUT_CSR2_REG=rOUT_CSR2_REG&~(EPO_AUTO_CLR/*|EPO_OUT_DMA_INT_MASK*/); 
    //AUTOCLEAR off,interrupt_enabled (???)
    rEP3_DMA_UNIT=1;	
    rEP3_DMA_CON=0; 
    //deamnd disable,out_dma_run=stop,in_dma_run=stop,DMA mode disable
	
	//wait until DMA_CON is effective.
	{
		register i = rEP3_DMA_CON;
		for(i=0;i<10;i++);
	}
}

#endif