STM32mp133 QSPI with MDMA

[Kaduru]

 

 

Hello Team,

I am currently working on QuadSPI with MDMA, but I am unable to locate the driver code for this functionality.
Could you please provide the required driver code?

For reference, I am working on the STM32MP133F series.

Regards,
Sreedhar Kaduru

 

 

[PatrickF]

Hi,

please see device tree bindings for Linux usage:
https://github.com/STMicroelectronics/linux/blob/v6.6-stm32mp/Documentation/devicetree/bindings/spi/st,stm32-qspi.yaml#L72 

For bare-metal, please look for stm32mp13xx_hal_xspi.c 

 

Regards

[Kaduru]

 

Hi,

Thanks for your quick reply.

I developed the following code to use QSPI with MDMA. During the transfer, when using MDMA, the BUSY bit in the QUADSPI status register gets set and does not clear.

Could you please let me know where I might be making a mistake?

 

// #includes
//
#include "stm32mp13xx.h" // STM32MP13xx Microprocessor specific definition
#include "MDMA_Private.h" // MDMA private interface

// ===============================================================================================================================
// Static/Global variables
//

// MDMA device channel available in STM32MP
MDMA_Channel_TypeDef* g_pastMDMAChannel[MDMA_CH_MAX] = { MDMA_Channel0, MDMA_Channel1, MDMA_Channel2, MDMA_Channel3, \
MDMA_Channel4, MDMA_Channel5, MDMA_Channel6, MDMA_Channel7, \
MDMA_Channel8, MDMA_Channel9, MDMA_Channel10, MDMA_Channel11, \
MDMA_Channel12, MDMA_Channel13, MDMA_Channel14, MDMA_Channel15,\
MDMA_Channel16, MDMA_Channel17, MDMA_Channel18, MDMA_Channel19,\
MDMA_Channel20, MDMA_Channel21, MDMA_Channel22, MDMA_Channel23,\
MDMA_Channel24, MDMA_Channel25, MDMA_Channel26, MDMA_Channel27,\
MDMA_Channel28, MDMA_Channel29, MDMA_Channel30, MDMA_Channel31 };

// MDMA device initialized flag
BOOL s_fMDMAInitialized = FALSE;

// ===============================================================================================================================
// API Functions
//3

//*********************************************************************************************************************************
// Function Name: MDMA_Init
//
// Prototype Description: Devices\Inc\MDMA_Private.h
//
// Algorithm:
//*********************************************************************************************************************************
VOID MDMA_Init(VOID)
{
if (s_fMDMAInitialized == FALSE)
{
// Enable clock for MDMA peripheral
RCC->MP_NS_AHB6ENSETR = RCC_MP_NS_AHB6ENSETR_MDMAEN;

// Enable clock for TZCEN
RCC->MP_APB5ENSETR = RCC_MP_APB5ENSETR_ETZPCEN;

// Set the flag to indicate that the MDMA transport has been initialized
s_fMDMAInitialized = TRUE;
}
}

//*********************************************************************************************************************************
// Function Name: MDMA_ConfigureChannel
//
// Prototype Description: Devices\Inc\MDMA_Private.h
//
// Algorithm:
//
//*********************************************************************************************************************************
UINT MDMA_ConfigureChannel( UCHAR ucMDMAChNo, MDMA_CONFIG* pstMDMAConfig)
{
UINT uiRetVal = SUCCESS;

// Validate the parameters
if ((ucMDMAChNo >= MDMA_CH_MAX) ||(pstMDMAConfig == NULL) ||
((pstMDMAConfig->uiDestinationaddr) == NULL) || ((pstMDMAConfig->uiSourceaddr) == NULL) ||
((pstMDMAConfig->uiNumbytes) == 0) )
{
uiRetVal = PARAMETER_ERROR;
}
else
{
// Clear MDMA channel
g_pastMDMAChannel[ucMDMAChNo]->CCR &= ~(MDMA_CCR_EN);
g_pastMDMAChannel[ucMDMAChNo]->CCR |= ((pstMDMAConfig->ePriorityLevel) << MDMA_CCR_PL_Pos);

g_pastMDMAChannel[ucMDMAChNo]->CTCR &= ~(MDMA_CTCR_SINC| MDMA_CTCR_DINC| MDMA_CTCR_SSIZE| MDMA_CTCR_DSIZE| MDMA_CTCR_TLEN);

if (pstMDMAConfig->uiTriggerSignal == MDMA_REQUEST_QUADSPI_TC)
{
g_pastMDMAChannel[ucMDMAChNo]->CTCR &= ~MDMA_CTCR_DINC_0;
g_pastMDMAChannel[ucMDMAChNo]->CTCR |= MDMA_CTCR_SINC_0;
g_pastMDMAChannel[ucMDMAChNo]->CTBR |= MDMA_REQUEST_QUADSPI_TC;

}
else
{
g_pastMDMAChannel[ucMDMAChNo]->CTCR &= ~MDMA_CTCR_SINC_0;
g_pastMDMAChannel[ucMDMAChNo]->CTCR |= MDMA_CTCR_DINC_0;
g_pastMDMAChannel[ucMDMAChNo]->CTBR |= MDMA_REQUEST_QUADSPI_FIFO_TH;

}

g_pastMDMAChannel[ucMDMAChNo]->CTCR |= (pstMDMAConfig->uiNumbytes - 1) << MDMA_CTCR_TLEN_Pos;

g_pastMDMAChannel[ucMDMAChNo]->CTCR |= MDMA_CTCR_TRGM_0;

g_pastMDMAChannel[ucMDMAChNo]->CBNDTR |= (pstMDMAConfig->uiNumbytes - 1);

g_pastMDMAChannel[ucMDMAChNo]->CSAR = pstMDMAConfig->uiSourceaddr;
g_pastMDMAChannel[ucMDMAChNo]->CDAR = pstMDMAConfig->uiDestinationaddr;

// Write Link Address Register
g_pastMDMAChannel[ucMDMAChNo]->CLAR = 0;
g_pastMDMAChannel[ucMDMAChNo]->CIFCR = MDMA_CIFCR_CTEIF | MDMA_CIFCR_CCTCIF | MDMA_CISR_BRTIF | MDMA_CISR_BTIF | MDMA_CISR_TCIF;
g_pastMDMAChannel[ucMDMAChNo]->CCR |= MDMA_CCR_TEIE | MDMA_CCR_BTIE | MDMA_CCR_CTCIE| MDMA_CCR_TCIE;

// Clear MDMA channel
g_pastMDMAChannel[ucMDMAChNo]->CCR |= MDMA_CCR_EN;

}

return uiRetVal;
}

[Kaduru]

 

Hello Team,
I am currently blocked due to this issue. Could you please assist me?