arch/arm/plat-feroceon/mv_hal/usb/mvUsbAddrDec.c

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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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*******************************************************************************/

#include "mvCommon.h"
#include "mvOs.h"
#include "ctrlEnv/mvCtrlEnvSpec.h"
#include "mvUsbRegs.h"
#include "mvUsb.h"

MV_TARGET usbAddrDecPrioTab[] = {
#if defined(MV_INCLUDE_SDRAM_CS0)
	SDRAM_CS0,
#endif
#if defined(MV_INCLUDE_SDRAM_CS1)
	SDRAM_CS1,
#endif
#if defined(MV_INCLUDE_SDRAM_CS2)
	SDRAM_CS2,
#endif
#if defined(MV_INCLUDE_SDRAM_CS3)
	SDRAM_CS3,
#endif
#if defined(MV_INCLUDE_CESA) && defined(USB_UNDERRUN_WA)
	CRYPT_ENG,
#endif
#if defined(MV_INCLUDE_PEX)
#if defined(MV_INCLUDE_PEX0)
	PEX0_MEM,
#endif
#if defined(MV_INCLUDE_PEX1)
	PEX1_MEM,
#endif
#endif
	TBL_TERM
};

/*******************************************************************************
* usbWinOverlapDetect - Detect USB address windows overlapping
*
* DESCRIPTION:
*       An unpredicted behaviur is expected in case USB address decode
*       windows overlapps.
*       This function detects USB address decode windows overlapping of a
*       specified window. The function does not check the window itself for
*       overlapping. The function also skipps disabled address decode windows.
*
* INPUT:
*       winNum      - address decode window number.
*       pAddrDecWin - An address decode window struct.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_TRUE if the given address window overlap current address
*       decode map, MV_FALSE otherwise, MV_ERROR if reading invalid data
*       from registers.
*
*******************************************************************************/
static MV_STATUS usbWinOverlapDetect(MV_U32 dev, MV_U32 winNum, MV_ADDR_WIN *pAddrWin)
{
	MV_U32 winNumIndex;
	MV_UNIT_WIN_INFO addrDecWin;

	for (winNumIndex = 0; winNumIndex < MV_USB_MAX_ADDR_DECODE_WIN; winNumIndex++) {
		/* Do not check window itself       */
		if (winNumIndex == winNum)
			continue;

		/* Get window parameters    */
		if (MV_OK != mvUsbWinRead(dev, winNumIndex, &addrDecWin)) {
			mvOsPrintf("%s: ERR. TargetWinGet failed\n", __func__);
			return MV_ERROR;
		}

		/* Do not check disabled windows    */
		if (addrDecWin.enable == MV_FALSE)
			continue;

		if (MV_TRUE == mvWinOverlapTest(pAddrWin, &(addrDecWin.addrWin)))
			return MV_TRUE;
	}
	return MV_FALSE;
}

/*******************************************************************************
* mvUsbWinWrite - Set USB target address window
*
* DESCRIPTION:
*       This function sets a peripheral target (e.g. SDRAM bank0, PCI_MEM0)
*       address window, also known as address decode window.
*       After setting this target window, the USB will be able to access the
*       target within the address window.
*
* INPUT:
*       winNum      - USB target address decode window number.
*       pAddrDecWin - USB target window data structure.
*
* OUTPUT:
*       None.
*
* RETURN:
*       MV_ERROR if address window overlapps with other address decode windows.
*       MV_BAD_PARAM if base address is invalid parameter or target is
*       unknown.
*
*******************************************************************************/
MV_STATUS mvUsbWinWrite(MV_U32 dev, MV_U32 winNum, MV_UNIT_WIN_INFO *pDecWin)
{
	MV_U32 sizeReg, baseReg;
	MV_U32 size;

	/* Parameter checking   */
	if (winNum >= MV_USB_MAX_ADDR_DECODE_WIN) {
		mvOsPrintf("%s: ERR. Invalid win num %d\n", __func__, winNum);
		return MV_BAD_PARAM;
	}

	/* Check if the requested window overlapps with current windows         */
	if (MV_TRUE == usbWinOverlapDetect(dev, winNum, &pDecWin->addrWin)) {
		mvOsPrintf("%s: ERR. Window %d overlap\n", __func__, winNum);
		return MV_ERROR;
	}

	/* check if address is aligned to the size */
	if (MV_IS_NOT_ALIGN(pDecWin->addrWin.baseLow, pDecWin->addrWin.size)) {
		mvOsPrintf("mvUsbWinWrite:Error setting USB window %d.\n"
			   "Address 0x%08x is unaligned to size 0x%x.\n",
			   winNum, pDecWin->addrWin.baseLow, pDecWin->addrWin.size);
		return MV_ERROR;
	}

	if (!MV_IS_POWER_OF_2(pDecWin->addrWin.size)) {
		mvOsPrintf("mvUsbWinWrite: Bad windows size.\n");
		return MV_BAD_PARAM;
	}

	size = pDecWin->addrWin.size / MV_USB_WIN_SIZE_ALIGN - 1;

	/* set Size, Attributes and TargetID */
	sizeReg = (((pDecWin->targetId << MV_USB_WIN_TARGET_OFFSET) & MV_USB_WIN_TARGET_MASK) |
		   ((pDecWin->attrib << MV_USB_WIN_ATTR_OFFSET) & MV_USB_WIN_ATTR_MASK) |
		   ((size << MV_USB_WIN_SIZE_OFFSET) & MV_USB_WIN_SIZE_MASK));

#if defined(MV645xx) || defined(MV646xx)
	/* If window is DRAM with HW cache coherency, make sure bit2 is set */
	sizeReg &= ~MV_USB_WIN_BURST_WR_LIMIT_MASK;

	if ((MV_TARGET_IS_DRAM(pDecWin->target)) && (pDecWin->addrWinAttr.cachePolicy != NO_COHERENCY))
		sizeReg |= MV_USB_WIN_BURST_WR_32BIT_LIMIT;
	else
		sizeReg |= MV_USB_WIN_BURST_WR_NO_LIMIT;

#endif /* MV645xx || MV646xx */

	if (pDecWin->enable == MV_TRUE)
		sizeReg |= MV_USB_WIN_ENABLE_MASK;
	else
		sizeReg &= ~MV_USB_WIN_ENABLE_MASK;

	/* Update Base value  */
	baseReg = (pDecWin->addrWin.baseLow & MV_USB_WIN_BASE_MASK);

	MV_REG_WRITE(MV_USB_WIN_CTRL_REG(dev, winNum), sizeReg);
	MV_REG_WRITE(MV_USB_WIN_BASE_REG(dev, winNum), baseReg);

	return MV_OK;
}

/*******************************************************************************
* mvUsbWinRead - Get USB peripheral target address window.
*
* DESCRIPTION:
*       Get USB peripheral target address window.
*
* INPUT:
*       winNum - USB target address decode window number.
*
* OUTPUT:
*       pDecWin - USB target window data structure.
*
* RETURN:
*       MV_ERROR if register parameters are invalid.
*
*******************************************************************************/
MV_STATUS mvUsbWinRead(MV_U32 dev, MV_U32 winNum, MV_UNIT_WIN_INFO *pDecWin)
{
	MV_U32 sizeReg, baseReg;

	/* Parameter checking   */
	if (winNum >= MV_USB_MAX_ADDR_DECODE_WIN) {
		mvOsPrintf("%s (dev=%d): ERR. Invalid winNum %d\n", __func__, dev, winNum);
		return MV_NOT_SUPPORTED;
	}

	baseReg = MV_REG_READ(MV_USB_WIN_BASE_REG(dev, winNum));
	sizeReg = MV_REG_READ(MV_USB_WIN_CTRL_REG(dev, winNum));

	/* Check if window is enabled   */
	if (sizeReg & MV_USB_WIN_ENABLE_MASK) {
		pDecWin->enable = MV_TRUE;

		/* Extract window parameters from registers */
		pDecWin->targetId = (sizeReg & MV_USB_WIN_TARGET_MASK) >> MV_USB_WIN_TARGET_OFFSET;
		pDecWin->attrib = (sizeReg & MV_USB_WIN_ATTR_MASK) >> MV_USB_WIN_ATTR_OFFSET;
		pDecWin->addrWin.size = (sizeReg & MV_USB_WIN_SIZE_MASK) >> MV_USB_WIN_SIZE_OFFSET;
		pDecWin->addrWin.size = (pDecWin->addrWin.size + 1) * MV_USB_WIN_SIZE_ALIGN;
		pDecWin->addrWin.baseLow = (baseReg & MV_USB_WIN_BASE_MASK);
		pDecWin->addrWin.baseHigh = 0;
	} else {
		pDecWin->enable = MV_FALSE;
	}
	return MV_OK;
}

/*******************************************************************************
* mvUsbWinInit -
*
* INPUT:
*
* OUTPUT:
*
* RETURN:
*       MV_ERROR if register parameters are invalid.
*
*******************************************************************************/
MV_STATUS mvUsbWinInit(MV_U32 dev, MV_UNIT_WIN_INFO *addrWinMap)
{
	MV_UNIT_WIN_INFO *addrDecWin;
	MV_U32 winNum;
	MV_U32 winPrioIndex = 0;

	/* First disable all address decode windows */
	for (winNum = 0; winNum < MV_USB_MAX_ADDR_DECODE_WIN; winNum++)
		MV_REG_BIT_RESET(MV_USB_WIN_CTRL_REG(dev, winNum), MV_USB_WIN_ENABLE_MASK);

	/* Go through all windows in user table until table terminator          */
	winNum = 0;
	while ((usbAddrDecPrioTab[winPrioIndex] != TBL_TERM) && (winNum < MV_USB_MAX_ADDR_DECODE_WIN)) {
		addrDecWin = &addrWinMap[usbAddrDecPrioTab[winPrioIndex]];
		if (addrDecWin->enable == MV_TRUE) {
#if defined(MV645xx) || defined(MV646xx)
			/* Get the default attributes for that target window */
			mvCtrlDefAttribGet(usbWin.target, &usbWin.addrWinAttr);
#endif /* MV645xx || MV646xx */

			if (MV_OK != mvUsbWinWrite(dev, winNum, addrDecWin))
				return MV_ERROR;
			winNum++;
		}
		winPrioIndex++;
	}
	return MV_OK;
}