stm32cube: stm32n6: sdio: fix SDIO polling mode

transfer issues

this commit fixes two issues in SDIO driver:
incorrect block count calculation and improper
buffer size handling.

Signed-off-by: Sarah Younis <[email protected]>

Author: ExaltZephyr

stm32cube/stm32n6xx/README

@@ -55,7 +55,7 @@ Patch List:
     -soc/system_stm32n6xx_s.c
 
    *Fix SDIO initialization failure when skipping card identification sequence
-     Fixes an issue in the STM32HN6 SDIO driver where HAL_SDIO_Init() fails if
+     Fixes an issue in the STM32N6 SDIO driver where HAL_SDIO_Init() fails if
      the card identification sequence is skipped.
      Impacted files:
       stm32cube/stm32n6xx/drivers/src/stm32n6xx_hal_sdio.c
@@ -67,4 +67,9 @@ Patch List:
       stm32cube/stm32n6xx/drivers/src/stm32n6xx_hal_xspi.c
     Internal reference: 212765
 
-   See release_note.html from STM32Cube
+   *Fix SDIO polling mode data transfer issues
+     Fixes two related issues in the STM32N6 SDIO driver: incorrect block count calculation 
+     that caused the card to hang, and improper buffer size handling that led to misaligned FIFO writes. 
+     Together, these changes ensure correct and stable data transfer in polling mode.
+     Impacted file: 
+      stm32cube/stm32n6xx/drivers/src/stm32n6xx_hal_sdio.c   

stm32cube/stm32n6xx/drivers/src/stm32n6xx_hal_sdio.c

@@ -1002,7 +1002,7 @@ HAL_StatusTypeDef HAL_SDIO_ReadExtended(SDIO_HandleTypeDef *hsdio, HAL_SDIO_Exte
     cmd |= Argument->Block_Mode << 27U;
     cmd |= Argument->OpCode << 26U;
     cmd |= (Argument->Reg_Addr & 0x1FFFFU) << 9U;
-    cmd |= (Size_byte & 0x1FFU);
+    cmd |= ((nbr_of_block == 0U)? Size_byte : nbr_of_block)& 0x1FFU;
     errorstate = SDMMC_SDIO_CmdReadWriteExtended(hsdio->Instance, cmd);
     if (errorstate != HAL_SDIO_ERROR_NONE)
     {
@@ -1147,7 +1147,7 @@ HAL_StatusTypeDef HAL_SDIO_WriteExtended(SDIO_HandleTypeDef *hsdio, HAL_SDIO_Ext
   uint8_t byteCount;
   uint32_t data;
   uint32_t dataremaining;
-  uint8_t *u32tempbuff = pData;
+  uint32_t *u32tempbuff = (uint32_t *) pData;
   uint32_t nbr_of_block;
 
   /* Check the parameters */
@@ -1207,7 +1207,7 @@ HAL_StatusTypeDef HAL_SDIO_WriteExtended(SDIO_HandleTypeDef *hsdio, HAL_SDIO_Ext
     cmd |= Argument->Block_Mode << 27U;
     cmd |= Argument->OpCode << 26U;
     cmd |= (Argument->Reg_Addr & 0x1FFFFU) << 9U;
-    cmd |= (Size_byte & 0x1FFU);
+    cmd |= ((nbr_of_block == 0U)? Size_byte : nbr_of_block)& 0x1FFU;
     errorstate = SDMMC_SDIO_CmdReadWriteExtended(hsdio->Instance, cmd);
     if (errorstate != HAL_SDIO_ERROR_NONE)
     {