embeddedsw/XilinxProcessorIPLib/drivers/hwicap/src/xhwicap_device_read_frame.c

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/****************************************************************************/
/**
*
* @file xhwicap_device_read_frame.c
*
* This file contains the function that reads a specified frame from the
* device (ICAP) and stores it in the memory specified by the user.
*
* @note none.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver   Who  Date     Changes
* ----- ---- -------- -------------------------------------------------------
* 1.00a bjb  11/20/03 First release
* 1.01a nps  04/10/06 V4 Support
* 2.00a ecm  10/20/07 V5 Support
* 4.00a hvm  11/30/09 Added support for V6 and updated with HAL phase 1
*					  modifications
* 5.00a hvm  2/25/10  Added support for S6
* 6.00a hvm  08/01/11 Added support for K7
* 10.0  bss  6/24/14  Removed support for families older than 7 series
* </pre>
*
*****************************************************************************/

/***************************** Include Files ********************************/

#include "xhwicap_i.h"
#include "xhwicap.h"
#include <xil_types.h>
#include <xil_assert.h>

/************************** Constant Definitions ****************************/

#define READ_FRAME_SIZE 20

/**************************** Type Definitions ******************************/


/***************** Macros (Inline Functions) Definitions ********************/


/************************** Variable Definitions ****************************/


/************************** Function Prototypes *****************************/
/****************************************************************************/
/**
*
* Reads one frame from the device and puts it in memory specified by the user.
*
* @param	InstancePtr - a pointer to the XHwIcap instance to be worked on.
* @param	Top - top (0) or bottom (1) half of device
* @param	Block - Block Address (XHI_FAR_CLB_BLOCK,
*		XHI_FAR_BRAM_BLOCK, XHI_FAR_BRAM_INT_BLOCK)
* @param	HClkRow - selects the HClk Row
* @param	MajorFrame - selects the column
* @param	MinorFrame - selects frame inside column
* @param	FrameBuffer is a pointer to the memory where the frame read
*		from the device is stored
*
* @return	XST_SUCCESS else XST_FAILURE.
*
* @note		This is a blocking call.
*
*****************************************************************************/
int XHwIcap_DeviceReadFrame(XHwIcap *InstancePtr, long Top, long Block,
				long HClkRow, long MajorFrame, long MinorFrame,
				u32 *FrameBuffer)
{

	u32 Packet;
	u32 Data;
	u32 TotalWords;
	int Status;
	u32 WriteBuffer[READ_FRAME_SIZE];
	u32 Index = 0;

	Xil_AssertNonvoid(InstancePtr != NULL);
	Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);
	Xil_AssertNonvoid(FrameBuffer != NULL);

	/*
	 * DUMMY and SYNC
	 */
	WriteBuffer[Index++] = XHI_DUMMY_PACKET;
	WriteBuffer[Index++] = XHI_SYNC_PACKET;
	WriteBuffer[Index++] = XHI_NOOP_PACKET;
	WriteBuffer[Index++] = XHI_NOOP_PACKET;

	/*
	 * Reset CRC
	 */
	Packet = XHwIcap_Type1Write(XHI_CMD) | 1;
	WriteBuffer[Index++] = Packet;
	WriteBuffer[Index++] = XHI_CMD_RCRC;
	WriteBuffer[Index++] = XHI_NOOP_PACKET;
	WriteBuffer[Index++] = XHI_NOOP_PACKET;

	/*
	 * Setup CMD register to read configuration
	 */
	Packet = XHwIcap_Type1Write(XHI_CMD) | 1;
	WriteBuffer[Index++] = Packet;
	WriteBuffer[Index++] = XHI_CMD_RCFG;
	WriteBuffer[Index++] = XHI_NOOP_PACKET;
	WriteBuffer[Index++] = XHI_NOOP_PACKET;
	WriteBuffer[Index++] = XHI_NOOP_PACKET;

	/*
	 * Setup FAR register.
	 */
	Packet = XHwIcap_Type1Write(XHI_FAR) | 1;
	Data = XHwIcap_SetupFarV5(Top, Block, HClkRow,  MajorFrame, MinorFrame);
	WriteBuffer[Index++] = Packet;
	WriteBuffer[Index++] = Data;

	/*
	 * Setup read data packet header.
	 * The frame will be preceeded by a dummy frame, and we need to read one
	 * extra word for V4 and V5 devices.
	 */
	TotalWords = (InstancePtr->WordsPerFrame << 1);
	/*
	 * Create Type one packet
	 */
	Packet = XHwIcap_Type1Read(XHI_FDRO) | TotalWords;
	WriteBuffer[Index++] = Packet;
	WriteBuffer[Index++] = XHI_NOOP_PACKET;
	WriteBuffer[Index++] = XHI_NOOP_PACKET;

	/*
	 * Write the data to the FIFO and initiate the transfer of data
	 * present in the FIFO to the ICAP device
	 */
	Status = XHwIcap_DeviceWrite(InstancePtr, (u32 *)&WriteBuffer[0],
			Index);
	if (Status != XST_SUCCESS)  {
		return XST_FAILURE;
	}

	/*
	 * Wait till the write is done.
	 */
	while (XHwIcap_IsDeviceBusy(InstancePtr) != FALSE);


	/*
	 * Read the frame of the data including the NULL frame.
	 */
	Status = XHwIcap_DeviceRead(InstancePtr, FrameBuffer, TotalWords);
	if (Status != XST_SUCCESS)  {
		return XST_FAILURE;
	}

	/*
	 * Send DESYNC command
	 */
	Status = XHwIcap_CommandDesync(InstancePtr);
	if (Status != XST_SUCCESS)  {
		return XST_FAILURE;
	}

	return XST_SUCCESS;
};