linux-kernel - [PATCH 2/6] mmc: mmci: add stm32_idmabsize

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Message-ID: <20230615092001.1213132-3-yann.gautier@foss.st.com>
Date:   Thu, 15 Jun 2023 11:19:57 +0200
From:   Yann Gautier <yann.gautier@...s.st.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        <linux-mmc@...r.kernel.org>, <devicetree@...r.kernel.org>
CC:     Conor Dooley <conor+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Christophe Kerello <christophe.kerello@...s.st.com>,
        <linux-kernel@...r.kernel.org>, Marek Vasut <marex@...x.de>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Yang Yingliang <yangyingliang@...wei.com>,
        Xiang wangx <wangxiang@...rlc.com>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        Yann Gautier <yann.gautier@...s.st.com>
Subject: [PATCH 2/6] 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@...s.st.com>
---
 drivers/mmc/host/mmci.c             | 2 ++
 drivers/mmc/host/mmci.h             | 3 +--
 drivers/mmc/host/mmci_stm32_sdmmc.c | 4 ++--
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 726bf772b2e2d..eae3d1c8934cb 100644
--- a/drivers/mmc/host/mmci.c
+++ b/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,
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 12a7bbd3ce263..b1968cafc58bb 100644
--- a/drivers/mmc/host/mmci.h
+++ b/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);
 };
 
diff --git a/drivers/mmc/host/mmci_stm32_sdmmc.c b/drivers/mmc/host/mmci_stm32_sdmmc.c
index 50292f9c69046..7f43506b9bb08 100644
--- a/drivers/mmc/host/mmci_stm32_sdmmc.c
+++ b/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);
-- 
2.25.1