/*******************************************************************************
* mvCpuIfTargetWinSet - Set CPU-to-peripheral target address window
*
* DESCRIPTION:
* This function sets a peripheral target (e.g. SDRAM bank0, PCI0_MEM0)
* address window, also known as address decode window.
* A new address decode window is set for specified target address window.
* If address decode window parameter structure enables the window,
* the routine will also enable the target window, allowing CPU to access
* the target window.
*
* INPUT:
* target - Peripheral target enumerator.
* pAddrDecWin - CPU target window data structure.
*
* OUTPUT:
* N/A
*
* RETURN:
* MV_OK if CPU target window was set correctly, MV_ERROR in case of
* address window overlapps with other active CPU target window or
* trying to assign 36bit base address while CPU does not support that.
* The function returns MV_NOT_SUPPORTED, if the target is unsupported.
*
*******************************************************************************/
MV_STATUS mvCpuIfTargetWinSet(MV_TARGET target, MV_CPU_DEC_WIN *pAddrDecWin)
{
MV_AHB_TO_MBUS_DEC_WIN decWin;
MV_U32 existingWinNum;
MV_DRAM_DEC_WIN addrDecWin;
target = MV_CHANGE_BOOT_CS(target);
/* Check parameters */
if (target >= MAX_TARGETS)
{
mvOsPrintf("mvCpuIfTargetWinSet: target %d is illegal\n", target);
return MV_ERROR;
}
/* 2) Check if the requested window overlaps with current windows */
if (MV_TRUE == cpuTargetWinOverlap(target, &pAddrDecWin->addrWin))
{
mvOsPrintf("mvCpuIfTargetWinSet: ERR. Target %d overlap\n", target);
return MV_BAD_PARAM;
}
if (MV_TARGET_IS_DRAM(target))
{
/* copy relevant data to MV_DRAM_DEC_WIN structure */
addrDecWin.addrWin.baseHigh = pAddrDecWin->addrWin.baseHigh;
addrDecWin.addrWin.baseLow = pAddrDecWin->addrWin.baseLow;
addrDecWin.addrWin.size = pAddrDecWin->addrWin.size;
addrDecWin.enable = pAddrDecWin->enable;
if (mvDramIfWinSet(target,&addrDecWin) != MV_OK);
{
mvOsPrintf("mvCpuIfTargetWinSet: mvDramIfWinSet Failed\n");
return MV_ERROR;
}
}
else
{
/* copy relevant data to MV_AHB_TO_MBUS_DEC_WIN structure */
decWin.addrWin.baseLow = pAddrDecWin->addrWin.baseLow;
decWin.addrWin.baseHigh = pAddrDecWin->addrWin.baseHigh;
decWin.addrWin.size = pAddrDecWin->addrWin.size;
decWin.enable = pAddrDecWin->enable;
decWin.target = target;
existingWinNum = mvAhbToMbusWinTargetGet(target);
/* check if there is already another Window configured
for this target */
if ((existingWinNum < MAX_AHB_TO_MBUS_WINS )&&
(existingWinNum != pAddrDecWin->winNum))
{
/* if we want to enable the new winow number
passed by the user , then the old one should
be disabled */
if (MV_TRUE == pAddrDecWin->enable)
{
/* be sure it is disabled */
mvAhbToMbusWinEnable(existingWinNum , MV_FALSE);
}
}
if (mvAhbToMbusWinSet(pAddrDecWin->winNum,&decWin) != MV_OK)
{
mvOsPrintf("mvCpuIfTargetWinSet: mvAhbToMbusWinSet Failed\n");
return MV_ERROR;
}
}
return MV_OK;
}
/*******************************************************************************
* mvDramIfDetect - Prepare DRAM interface configuration values.
*
* DESCRIPTION:
* This function implements the full DRAM detection and timing
* configuration for best system performance.
* Since this routine runs from a ROM device (Boot Flash), its stack
* resides on RAM, that might be the system DRAM. Changing DRAM
* configuration values while keeping vital data in DRAM is risky. That
* is why the function does not preform the configuration setting but
* prepare those in predefined 32bit registers (in this case IDMA
* registers are used) for other routine to perform the settings.
* The function will call for board DRAM SPD information for each DRAM
* chip select. The function will then analyze those SPD parameters of
* all DRAM banks in order to decide on DRAM configuration compatible
* for all DRAM banks.
* The function will set the CPU DRAM address decode registers.
* Note: This routine prepares values that will overide configuration of
* mvDramBasicAsmInit().
*
* INPUT:
* forcedCl - Forced CAL Latency. If equal to zero, do not force.
*
* OUTPUT:
* None.
*
* RETURN:
* None.
*
*******************************************************************************/
MV_STATUS mvDramIfDetect(MV_U32 forcedCl)
{
MV_U32 retVal = MV_OK; /* return value */
MV_DRAM_BANK_INFO bankInfo[MV_DRAM_MAX_CS];
MV_U32 busClk, size, base = 0, i, temp, deviceW, dimmW;
MV_U8 minCas;
MV_DRAM_DEC_WIN dramDecWin;
dramDecWin.addrWin.baseHigh = 0;
busClk = mvBoardSysClkGet();
if (0 == busClk)
{
mvOsPrintf("Dram: ERR. Can't detect system clock! \n");
return MV_ERROR;
}
/* Close DRAM banks except bank 0 (in case code is excecuting from it...) */
for(i= SDRAM_CS1; i <= SDRAM_CS3; i++)
mvCpuIfTargetWinEnable(i, MV_FALSE);
/* we will use bank 0 as the representative of the all the DRAM banks, */
/* since bank 0 must exist. */
for(i = 0; i < MV_DRAM_MAX_CS; i++)
{
/* if Bank exist */
if(MV_OK == mvDramBankInfoGet(i, &bankInfo[i]))
{
/* check it isn't SDRAM */
if(bankInfo[i].memoryType == MEM_TYPE_SDRAM)
{
mvOsPrintf("Dram: ERR. SDRAM type not supported !!!\n");
return MV_ERROR;
}
/* All banks must support registry in order to activate it */
if(bankInfo[i].registeredAddrAndControlInputs !=
bankInfo[0].registeredAddrAndControlInputs)
{
mvOsPrintf("Dram: ERR. different Registered settings !!!\n");
return MV_ERROR;
}
/* Init the CPU window decode */
/* Note that the size in Bank info is in MB units */
/* Note that the Dimm width might be different then the device DRAM width */
temp = MV_REG_READ(SDRAM_CONFIG_REG);
deviceW = ((temp & SDRAM_DWIDTH_MASK) == SDRAM_DWIDTH_16BIT )? 16 : 32;
dimmW = bankInfo[0].dataWidth - (bankInfo[0].dataWidth % 16);
size = ((bankInfo[i].size << 20) / (dimmW/deviceW));
/* We can not change DRAM window settings while excecuting */
/* code from it. That is why we skip the DRAM CS[0], saving */
/* it to the ROM configuration routine */
if(i == SDRAM_CS0)
{
MV_U32 sizeToReg;
/* Translate the given window size to register format */
sizeToReg = ctrlSizeToReg(size, SCSR_SIZE_ALIGNMENT);
/* Size parameter validity check. */
if (-1 == sizeToReg)
{
mvOsPrintf("mvCtrlAddrDecToReg: ERR. Win %d size invalid.\n"
,i);
return MV_BAD_PARAM;
}
/* Size is located at upper 16 bits */
sizeToReg <<= SCSR_SIZE_OFFS;
/* enable it */
sizeToReg |= SCSR_WIN_EN;
MV_REG_WRITE(DRAM_BUF_REG0, sizeToReg);
}
else
{
dramDecWin.addrWin.baseLow = base;
dramDecWin.addrWin.size = size;
dramDecWin.enable = MV_TRUE;
if (MV_OK != mvDramIfWinSet(SDRAM_CS0 + i, &dramDecWin))
{
mvOsPrintf("Dram: ERR. Fail to set bank %d!!!\n",
SDRAM_CS0 + i);
return MV_ERROR;
}
}
base += size;
/* update the suportedCasLatencies mask */
bankInfo[0].suportedCasLatencies &= bankInfo[i].suportedCasLatencies;
}
else
{
if( i == 0 ) /* bank 0 doesn't exist */
{
mvOsPrintf("Dram: ERR. Fail to detect bank 0 !!!\n");
return MV_ERROR;
}
else
{
DB(mvOsPrintf("Dram: Could not find bank %d\n", i));
bankInfo[i].size = 0; /* Mark this bank as non exist */
}
}
}
/* calculate minimum CAS */
minCas = minCasCalc(&bankInfo[0], busClk, forcedCl);
if (0 == minCas)
{
mvOsOutput("Dram: Warn: Could not find CAS compatible to SysClk %dMhz\n",
(busClk / 1000000));
if (MV_REG_READ(SDRAM_CONFIG_REG) & SDRAM_DTYPE_DDR2)
{
minCas = DDR2_CL_4; /* Continue with this CAS */
mvOsPrintf("Set default CAS latency 4\n");
}
else
{
minCas = DDR1_CL_3; /* Continue with this CAS */
mvOsPrintf("Set default CAS latency 3\n");
}
}
/* calc SDRAM_CONFIG_REG and save it to temp register */
temp = sdramConfigRegCalc(&bankInfo[0], busClk);
if(-1 == temp)
{
mvOsPrintf("Dram: ERR. sdramConfigRegCalc failed !!!\n");
return MV_ERROR;
}
MV_REG_WRITE(DRAM_BUF_REG1, temp);
/* calc SDRAM_MODE_REG and save it to temp register */
temp = sdramModeRegCalc(minCas);
if(-1 == temp)
{
mvOsPrintf("Dram: ERR. sdramModeRegCalc failed !!!\n");
return MV_ERROR;
}
MV_REG_WRITE(DRAM_BUF_REG2, temp);
/* calc SDRAM_EXTENDED_MODE_REG and save it to temp register */
temp = sdramExtModeRegCalc(&bankInfo[0]);
if(-1 == temp)
{
mvOsPrintf("Dram: ERR. sdramModeRegCalc failed !!!\n");
return MV_ERROR;
}
MV_REG_WRITE(DRAM_BUF_REG10, temp);
/* calc D_UNIT_CONTROL_LOW and save it to temp register */
temp = dunitCtrlLowRegCalc(&bankInfo[0], minCas);
if(-1 == temp)
{
mvOsPrintf("Dram: ERR. dunitCtrlLowRegCalc failed !!!\n");
return MV_ERROR;
}
MV_REG_WRITE(DRAM_BUF_REG3, temp);
/* calc SDRAM_ADDR_CTRL_REG and save it to temp register */
temp = sdramAddrCtrlRegCalc(&bankInfo[0]);
if(-1 == temp)
{
mvOsPrintf("Dram: ERR. sdramAddrCtrlRegCalc failed !!!\n");
return MV_ERROR;
}
MV_REG_WRITE(DRAM_BUF_REG4, temp);
/* calc SDRAM_TIMING_CTRL_LOW_REG and save it to temp register */
temp = sdramTimeCtrlLowRegCalc(&bankInfo[0], minCas, busClk);
if(-1 == temp)
{
mvOsPrintf("Dram: ERR. sdramTimeCtrlLowRegCalc failed !!!\n");
return MV_ERROR;
}
MV_REG_WRITE(DRAM_BUF_REG5, temp);
/* calc SDRAM_TIMING_CTRL_HIGH_REG and save it to temp register */
temp = sdramTimeCtrlHighRegCalc(&bankInfo[0], busClk);
if(-1 == temp)
{
mvOsPrintf("Dram: ERR. sdramTimeCtrlHighRegCalc failed !!!\n");
return MV_ERROR;
}
MV_REG_WRITE(DRAM_BUF_REG6, temp);
/* Config DDR2 On Die Termination (ODT) registers */
if (MV_REG_READ(SDRAM_CONFIG_REG) & SDRAM_DTYPE_DDR2)
{
sdramDDr2OdtConfig(bankInfo);
}
/* Note that DDR SDRAM Address/Control and Data pad calibration */
/* settings is done in mvSdramIfConfig.s */
return retVal;
}