mmc: mmci: add stm32_idmabsize_align parameter

The alignment for the IDMA size depends on the peripheral version, it
should then be configurable. Add stm32_idmabsize_align in the variant
structure.
And remove now unused (and wrong) MMCI_STM32_IDMABNDT_* macros.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Link: https://lore.kernel.org/r/20230619115120.64474-3-yann.gautier@foss.st.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: Yann-lms

drivers/mmc/host/mmci.c

@@ -270,6 +270,7 @@ static struct variant_data variant_stm32_sdmmc = {
 	.datactrl_any_blocksz	= true,
 	.datactrl_mask_sdio	= MCI_DPSM_ST_SDIOEN,
 	.stm32_idmabsize_mask	= GENMASK(12, 5),
+	.stm32_idmabsize_align	= BIT(5),
 	.busy_timeout		= true,
 	.busy_detect		= true,
 	.busy_detect_flag	= MCI_STM32_BUSYD0,
@@ -296,6 +297,7 @@ static struct variant_data variant_stm32_sdmmcv2 = {
 	.datactrl_any_blocksz	= true,
 	.datactrl_mask_sdio	= MCI_DPSM_ST_SDIOEN,
 	.stm32_idmabsize_mask	= GENMASK(16, 5),
+	.stm32_idmabsize_align	= BIT(5),
 	.dma_lli		= true,
 	.busy_timeout		= true,
 	.busy_detect		= true,

drivers/mmc/host/mmci.h

@@ -227,8 +227,6 @@
 #define MMCI_STM32_IDMALLIEN	BIT(1)
 
 #define MMCI_STM32_IDMABSIZER		0x054
-#define MMCI_STM32_IDMABNDT_SHIFT	5
-#define MMCI_STM32_IDMABNDT_MASK	GENMASK(12, 5)
 
 #define MMCI_STM32_IDMABASE0R	0x058
 
@@ -374,6 +372,7 @@ struct variant_data {
 	u32			opendrain;
 	u8			dma_lli:1;
 	u32			stm32_idmabsize_mask;
+	u32			stm32_idmabsize_align;
 	void (*init)(struct mmci_host *host);
 };
 

drivers/mmc/host/mmci_stm32_sdmmc.c

@@ -15,7 +15,6 @@
 #include "mmci.h"
 
 #define SDMMC_LLI_BUF_LEN	PAGE_SIZE
-#define SDMMC_IDMA_BURST	BIT(MMCI_STM32_IDMABNDT_SHIFT)
 
 #define DLYB_CR			0x0
 #define DLYB_CR_DEN		BIT(0)
@@ -69,7 +68,8 @@ static int sdmmc_idma_validate_data(struct mmci_host *host,
 	idma->use_bounce_buffer = false;
 	for_each_sg(data->sg, sg, data->sg_len - 1, i) {
 		if (!IS_ALIGNED(sg->offset, sizeof(u32)) ||
-		    !IS_ALIGNED(sg->length, SDMMC_IDMA_BURST)) {
+		    !IS_ALIGNED(sg->length,
+				host->variant->stm32_idmabsize_align)) {
 			dev_dbg(mmc_dev(host->mmc),
 				"unaligned scatterlist: ofst:%x length:%d\n",
 				data->sg->offset, data->sg->length);