xdevcfg.c

自学ZedBoard：使用IP通过ARM PS访问FPGA（源代码）

/******************************************************************************
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******************************************************************************/
/****************************************************************************/
/**
*
* @file xdevcfg.c
*
* This file contains the implementation of the interface functions for XDcfg
* driver. Refer to the header file xdevcfg.h for more detailed information.
*
* <pre>
* MODIFICATION HISTORY:
*
* Ver   Who Date     Changes
* ----- --- -------- ---------------------------------------------
* 1.00a hvm 02/07/11 First release
* 2.00a nm  05/31/12 Updated the driver for CR 660835 so that input length for
*		     source/destination to the XDcfg_InitiateDma, XDcfg_Transfer
*		     APIs is words (32 bit) and not bytes.
* 		     Updated the notes for XDcfg_InitiateDma/XDcfg_Transfer APIs
*		     to add information that 2 LSBs of the Source/Destination
*		     address when equal to 2抌01 indicate the last DMA command
*		     of an overall transfer.
*		     Updated the XDcfg_Transfer function to use the
*		     Destination Address passed to this API for secure transfers
*		     instead of using 0xFFFFFFFF for CR 662197. This issue was
*		     resulting in the failure of secure transfers of
*		     non-bitstream images.
* </pre>
*
******************************************************************************/

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

#include "xdevcfg.h"

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

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

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

/************************** Function Prototypes ******************************/

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

/****************************************************************************/
/**
*
* Initialize the Device Config Interface driver. This function
* must be called before other functions of the driver are called.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
* @param	ConfigPtr is the config structure.
* @param	EffectiveAddress is the base address for the device. It could be
*		a virtual address if address translation is supported in the
*		system, otherwise it is the physical address.
*
* @return
*		- XST_SUCCESS if initialization was successful.
*		- XST_DEVICE_IS_STARTED if the device has already been started.
*
* @note		The very first APB access to the Device Configuration Interface
*		block needs to be a write to the UNLOCK register with the value
*		of 0x757BDF0D. This step is to be done once after reset, any
*		other APB access has to come after this. The APB access is
*		considered illegal if the step is not done or if it is done
*		incorrectly. Furthermore, if any of efuse_sec_cfg[5:0] is high,
*		the following additional actions would be carried out.
*		In other words, if all bits are low, the following steps are not
*		done.
*			1. AES is disabled
*			2. All APB writes disabled
*			3. SoC debug fully enabled
*
******************************************************************************/
int XDcfg_CfgInitialize(XDcfg *InstancePtr,
			 XDcfg_Config *ConfigPtr, u32 EffectiveAddress)
{
	Xil_AssertNonvoid(InstancePtr != NULL);
	Xil_AssertNonvoid(ConfigPtr != NULL);

	/*
	 * If the device is started, disallow the initialize and return a
	 * status indicating it is started. This allows the user to stop the
	 * device and reinitialize, but prevents a user from inadvertently
	 * initializing.
	 */
	if (InstancePtr->IsStarted == XIL_COMPONENT_IS_STARTED) {
		return XST_DEVICE_IS_STARTED;
	}

	/*
	 * Copy configuration into instance.
	 */
	InstancePtr->Config.DeviceId = ConfigPtr->DeviceId;

	/*
	 * Save the base address pointer such that the registers of the block
	 * can be accessed and indicate it has not been started yet.
	 */
	InstancePtr->Config.BaseAddr = EffectiveAddress;
	InstancePtr->IsStarted = 0;


	/* Unlock the Device Configuration Interface */
	XDcfg_Unlock(InstancePtr);

	/*
	 * Indicate the instance is ready to use, successfully initialized.
	 */
	InstancePtr->IsReady = XIL_COMPONENT_IS_READY;

	return XST_SUCCESS;
}

/****************************************************************************/
/**
*
* The functions enables the PCAP interface by setting the PCAP mode bit in the
* control register.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
*
* @return	None.
*
* @note		Enable FPGA programming	from PCAP interface. Enabling this bit
*		disables all the external interfaces from programming of FPGA
*		except for ICAP. The user needs to ensure that the FPGA is
*		programmed through either PCAP or ICAP.
*
*****************************************************************************/
void XDcfg_EnablePCAP(XDcfg *InstancePtr)
{
	u32 CtrlReg;
	/*
	 * Assert the arguments.
	 */
	Xil_AssertVoid(InstancePtr != NULL);
	Xil_AssertVoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);


	CtrlReg = XDcfg_ReadReg(InstancePtr->Config.BaseAddr,
					XDCFG_CTRL_OFFSET);

	XDcfg_WriteReg(InstancePtr->Config.BaseAddr, XDCFG_CTRL_OFFSET,
			(CtrlReg | XDCFG_CTRL_PCAP_MODE_MASK));

}

/****************************************************************************/
/**
*
* The functions disablees the PCAP interface by clearing the PCAP mode bit in
* the control register.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
*
* @return	None.
*
* @note		None.
*
*****************************************************************************/
void XDcfg_DisablePCAP(XDcfg *InstancePtr)
{
	u32 CtrlReg;
	/*
	 * Assert the arguments.
	 */
	Xil_AssertVoid(InstancePtr != NULL);
	Xil_AssertVoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);


	CtrlReg = XDcfg_ReadReg(InstancePtr->Config.BaseAddr,
					XDCFG_CTRL_OFFSET);

	XDcfg_WriteReg(InstancePtr->Config.BaseAddr, XDCFG_CTRL_OFFSET,
			(CtrlReg & ( ~XDCFG_CTRL_PCAP_MODE_MASK)));

}

/****************************************************************************/
/**
*
* The function sets the contents of the Control Register.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
* @param	Mask is the 32 bit mask data to be written to the Register.
*		The mask definitions are defined in the xdevcfg_hw.h file.
*
* @return	None.
*
* @note		None.
*
*****************************************************************************/
void XDcfg_SetControlRegister(XDcfg *InstancePtr, u32 Mask)
{
	u32 CtrlReg;
	/*
	 * Assert the arguments.
	 */
	Xil_AssertVoid(InstancePtr != NULL);
	Xil_AssertVoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);


	CtrlReg = XDcfg_ReadReg(InstancePtr->Config.BaseAddr,
					XDCFG_CTRL_OFFSET);

	XDcfg_WriteReg(InstancePtr->Config.BaseAddr, XDCFG_CTRL_OFFSET,
			(CtrlReg | Mask));

}

/****************************************************************************/
/**
*
* The function reads the contents of the Control Register.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
*
* @return	A 32-bit value representing the contents of the Control
*		Register.
*		Use the XDCFG_CTRL_*_MASK constants defined in xdevcfg_hw.h to
*		interpret the returned value.
*
* @note		None.
*
*****************************************************************************/
u32 XDcfg_GetControlRegister(XDcfg *InstancePtr)
{
	/*
	 * Assert the arguments.
	 */
	Xil_AssertNonvoid(InstancePtr != NULL);
	Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);

	/*
	 * Read the Control Register and return the value.
	 */
	return XDcfg_ReadReg(InstancePtr->Config.BaseAddr, XDCFG_CTRL_OFFSET);
}

/****************************************************************************/
/**
*
* The function sets the contents of the Lock Register. These bits
* can only be set to a 1. They will be cleared after a Power On Reset.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
* @param	Data is the 32 bit data to be written to the Register.
*
* @return	None.
*
* @note		None.
*
*****************************************************************************/
void XDcfg_SetLockRegister(XDcfg *InstancePtr, u32 Data)
{
	/*
	 * Assert the arguments.
	 */
	Xil_AssertVoid(InstancePtr != NULL);
	Xil_AssertVoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);

	XDcfg_WriteReg(InstancePtr->Config.BaseAddr, XDCFG_LOCK_OFFSET, Data);

}

/****************************************************************************/
/**
*
* The function reads the contents of the Lock Register.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
*
* @return	A 32-bit value representing the contents of the Lock
*		Register.
*		Use the XDCFG_CR_*_MASK constants defined in xdevcfg_hw.h to
*		interpret the returned value.
*
* @note		None.
*
*****************************************************************************/
u32 XDcfg_GetLockRegister(XDcfg *InstancePtr)
{
	/*
	 * Assert the arguments.
	 */
	Xil_AssertNonvoid(InstancePtr != NULL);
	Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);

	/*
	 * Read the Lock Register and return the value.
	 */
	return XDcfg_ReadReg(InstancePtr->Config.BaseAddr, XDCFG_LOCK_OFFSET);
}

/****************************************************************************/
/**
*
* The function sets the contents of the Configuration Register with the
* given value.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
* @param	Data is the 32 bit data to be written to the Register.
*
* @return	None.
*
* @note		None.
*
*****************************************************************************/
void XDcfg_SetConfigRegister(XDcfg *InstancePtr, u32 Data)
{
	/*
	 * Assert the arguments.
	 */
	Xil_AssertVoid(InstancePtr != NULL);
	Xil_AssertVoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);

	XDcfg_WriteReg(InstancePtr->Config.BaseAddr, XDCFG_CFG_OFFSET, Data);

}

/****************************************************************************/
/**
*
* The function reads the contents of the Configuration Register with the
* given value.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
*
* @return	A 32-bit value representing the contents of the Config
*		Register.
*		Use the XDCFG_CFG_*_MASK constants defined in xdevcfg_hw.h to
*		interpret the returned value.
*
* @note		None.
*
*****************************************************************************/
u32 XDcfg_GetConfigRegister(XDcfg *InstancePtr)
{
	/*
	 * Assert the arguments.
	 */
	Xil_AssertNonvoid(InstancePtr != NULL);
	Xil_AssertNonvoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);

	return XDcfg_ReadReg(InstancePtr->Config.BaseAddr, XDCFG_CFG_OFFSET);

}

/****************************************************************************/
/**
*
* The function sets the contents of the Status Register.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
* @param	Data is the 32 bit data to be written to the Register.
*
* @return	None.
*
* @note		None.
*
*****************************************************************************/
void XDcfg_SetStatusRegister(XDcfg *InstancePtr, u32 Data)
{
	/*
	 * Assert the arguments.
	 */
	Xil_AssertVoid(InstancePtr != NULL);
	Xil_AssertVoid(InstancePtr->IsReady == XIL_COMPONENT_IS_READY);

	XDcfg_WriteReg(InstancePtr->Config.BaseAddr, XDCFG_STATUS_OFFSET, Data);

}

/****************************************************************************/
/**
*
* The function reads the contents of the Status Register.
*
* @param	InstancePtr is a pointer to the XDcfg instance.
*
* @return	A 32-bit value representing the contents of the Status
*		Register.
*		Use the XDCFG_STATUS_*_MASK constants defined in
*		xdevcfg_hw.h to interpret the returned value.
*
* @note		None.
*
*****************************************************************************/
u32 XDcfg_GetStatusRegister(XDcfg *InstancePtr)
{
	/*