[PATCH 0/3] mmc: Add Loongson-2K0300 SD/SDIO/eMMC controller support

[PATCH 0/3] mmc: Add Loongson-2K0300 SD/SDIO/eMMC controller support

[Binbin Zhou]

Hi all:

The patchset describes two MMC controllers of the Loongson-2K0300 SoC,
one providing an eMMC interface and the other exporting an SD/SDIO
interface.

Its hardware design is similar to that of the Loongson-2K2000, but it
suffers from hardware defects such as missing CMD48 interrupts.

Thanks.
Binbin

Binbin Zhou (3):
  dt-bindings: mmc: loongson,ls2k0500-mmc: Add compatible for
    Loongson-2K0300
  mmc: loongson2: Gathering all SoCs private data together
  mmc: loongson2: Add Loongson-2K0300 SD/SDIO/eMMC controller driver

 .../bindings/mmc/loongson,ls2k0500-mmc.yaml   |  1 +
 drivers/mmc/host/loongson2-mmc.c              | 59 ++++++++++++++-----
 2 files changed, 44 insertions(+), 16 deletions(-)


base-commit: 6a4a4c1cc0012590b8bebf6c95d51687d39b420c
-- 
2.52.0

[PATCH 1/3] dt-bindings: mmc: loongson,ls2k0500-mmc: Add compatible for Loongson-2K0300

[Binbin Zhou]

Add "loongson,ls2k0300-mmc" dedicated compatible to represent the
eMMC/SD/SDIO controller interface of the Loongson-2K0300 chip.

Its hardware design is similar to that of the Loongson-2K2000, but it
suffers from hardware defects such as missing CMD48 interrupts.

Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
---
 Documentation/devicetree/bindings/mmc/loongson,ls2k0500-mmc.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/mmc/loongson,ls2k0500-mmc.yaml b/Documentation/devicetree/bindings/mmc/loongson,ls2k0500-mmc.yaml
index c142421bc723..b3e8d3f13592 100644
--- a/Documentation/devicetree/bindings/mmc/loongson,ls2k0500-mmc.yaml
+++ b/Documentation/devicetree/bindings/mmc/loongson,ls2k0500-mmc.yaml
@@ -22,6 +22,7 @@ allOf:
 properties:
   compatible:
     enum:
+      - loongson,ls2k0300-mmc
       - loongson,ls2k0500-mmc
       - loongson,ls2k1000-mmc
       - loongson,ls2k2000-mmc
-- 
2.52.0

[PATCH 2/3] mmc: loongson2: Gathering all SoCs private data together

[Binbin Zhou]

More Loongson SoCs will be added, gathering all SoC private data
(`loongson2_mmc_pdata`) together to make the code clearer.

No functional change intended.

Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
---
 drivers/mmc/host/loongson2-mmc.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/mmc/host/loongson2-mmc.c b/drivers/mmc/host/loongson2-mmc.c
index 026cbd80f114..333bed60df3b 100644
--- a/drivers/mmc/host/loongson2-mmc.c
+++ b/drivers/mmc/host/loongson2-mmc.c
@@ -703,14 +703,6 @@ static int ls2k0500_mmc_set_external_dma(struct loongson2_mmc_host *host,
 	return 0;
 }
 
-static struct loongson2_mmc_pdata ls2k0500_mmc_pdata = {
-	.regmap_config		= &ls2k0500_mmc_regmap_config,
-	.reorder_cmd_data	= ls2k0500_mmc_reorder_cmd_data,
-	.setting_dma		= ls2k0500_mmc_set_external_dma,
-	.prepare_dma		= loongson2_mmc_prepare_external_dma,
-	.release_dma		= loongson2_mmc_release_external_dma,
-};
-
 static int ls2k1000_mmc_set_external_dma(struct loongson2_mmc_host *host,
 					 struct platform_device *pdev)
 {
@@ -735,14 +727,6 @@ static int ls2k1000_mmc_set_external_dma(struct loongson2_mmc_host *host,
 	return 0;
 }
 
-static struct loongson2_mmc_pdata ls2k1000_mmc_pdata = {
-	.regmap_config		= &ls2k0500_mmc_regmap_config,
-	.reorder_cmd_data	= ls2k0500_mmc_reorder_cmd_data,
-	.setting_dma		= ls2k1000_mmc_set_external_dma,
-	.prepare_dma		= loongson2_mmc_prepare_external_dma,
-	.release_dma		= loongson2_mmc_release_external_dma,
-};
-
 static const struct regmap_config ls2k2000_mmc_regmap_config = {
 	.reg_bits = 32,
 	.val_bits = 32,
@@ -855,6 +839,22 @@ static void loongson2_mmc_release_internal_dma(struct loongson2_mmc_host *host,
 	dma_free_coherent(dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
 }
 
+static struct loongson2_mmc_pdata ls2k0500_mmc_pdata = {
+	.regmap_config		= &ls2k0500_mmc_regmap_config,
+	.reorder_cmd_data	= ls2k0500_mmc_reorder_cmd_data,
+	.setting_dma		= ls2k0500_mmc_set_external_dma,
+	.prepare_dma		= loongson2_mmc_prepare_external_dma,
+	.release_dma		= loongson2_mmc_release_external_dma,
+};
+
+static struct loongson2_mmc_pdata ls2k1000_mmc_pdata = {
+	.regmap_config		= &ls2k0500_mmc_regmap_config,
+	.reorder_cmd_data	= ls2k0500_mmc_reorder_cmd_data,
+	.setting_dma		= ls2k1000_mmc_set_external_dma,
+	.prepare_dma		= loongson2_mmc_prepare_external_dma,
+	.release_dma		= loongson2_mmc_release_external_dma,
+};
+
 static struct loongson2_mmc_pdata ls2k2000_mmc_pdata = {
 	.regmap_config		= &ls2k2000_mmc_regmap_config,
 	.reorder_cmd_data	= ls2k2000_mmc_reorder_cmd_data,
-- 
2.52.0

[PATCH 3/3] mmc: loongson2: Add Loongson-2K0300 SD/SDIO/eMMC controller driver

[Binbin Zhou]

This patch describes the two MMC controllers of the Loongson-2K0300 SoC,
one providing an eMMC interface and the other exporting an SD/SDIO
interface.

Its hardware design is similar to that of the Loongson-2K2000, but it
suffers from hardware defects such as missing CMD48 interrupts.

Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
---
 drivers/mmc/host/loongson2-mmc.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/drivers/mmc/host/loongson2-mmc.c b/drivers/mmc/host/loongson2-mmc.c
index 333bed60df3b..f553e92fd9e5 100644
--- a/drivers/mmc/host/loongson2-mmc.c
+++ b/drivers/mmc/host/loongson2-mmc.c
@@ -189,6 +189,12 @@
 #define LOONGSON2_MMC_DLLVAL_TIMEOUT_US		4000
 #define LOONGSON2_MMC_TXFULL_TIMEOUT_US		500
 
+/*
+ * Due to a hardware design flaw, the Loongson-2K0300 may fail to recognize the
+ * CMD48 (SD_READ_EXTR_SINGLE) interrupt.
+ */
+#define LOONGSON2_MMC_CMD48_QUIRK	BIT(0)
+
 /* Loongson-2K1000 SDIO2 DMA routing register */
 #define LS2K1000_SDIO_DMA_MASK		GENMASK(17, 15)
 #define LS2K1000_DMA0_CONF		0x0
@@ -245,6 +251,7 @@ struct loongson2_mmc_host {
 };
 
 struct loongson2_mmc_pdata {
+	u32 flags;
 	const struct regmap_config *regmap_config;
 	void (*reorder_cmd_data)(struct loongson2_mmc_host *host, struct mmc_command *cmd);
 	void (*fix_data_timeout)(struct loongson2_mmc_host *host, struct mmc_command *cmd);
@@ -568,6 +575,12 @@ static void loongson2_mmc_request(struct mmc_host *mmc, struct mmc_request *mrq)
 {
 	struct loongson2_mmc_host *host = mmc_priv(mmc);
 
+	if ((host->pdata->flags & LOONGSON2_MMC_CMD48_QUIRK) &&
+	    mrq->cmd->opcode == SD_READ_EXTR_SINGLE) {
+		mmc_request_done(mmc, mrq);
+		return;
+	}
+
 	host->cmd_is_stop = 0;
 	host->mrq = mrq;
 	loongson2_mmc_send_request(mmc);
@@ -839,7 +852,18 @@ static void loongson2_mmc_release_internal_dma(struct loongson2_mmc_host *host,
 	dma_free_coherent(dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
 }
 
+static struct loongson2_mmc_pdata ls2k0300_mmc_pdata = {
+	.flags			= LOONGSON2_MMC_CMD48_QUIRK,
+	.regmap_config		= &ls2k2000_mmc_regmap_config,
+	.reorder_cmd_data	= ls2k2000_mmc_reorder_cmd_data,
+	.fix_data_timeout	= ls2k2000_mmc_fix_data_timeout,
+	.setting_dma		= ls2k2000_mmc_set_internal_dma,
+	.prepare_dma		= loongson2_mmc_prepare_internal_dma,
+	.release_dma		= loongson2_mmc_release_internal_dma,
+};
+
 static struct loongson2_mmc_pdata ls2k0500_mmc_pdata = {
+	.flags			= 0,
 	.regmap_config		= &ls2k0500_mmc_regmap_config,
 	.reorder_cmd_data	= ls2k0500_mmc_reorder_cmd_data,
 	.setting_dma		= ls2k0500_mmc_set_external_dma,
@@ -848,6 +872,7 @@ static struct loongson2_mmc_pdata ls2k0500_mmc_pdata = {
 };
 
 static struct loongson2_mmc_pdata ls2k1000_mmc_pdata = {
+	.flags			= 0,
 	.regmap_config		= &ls2k0500_mmc_regmap_config,
 	.reorder_cmd_data	= ls2k0500_mmc_reorder_cmd_data,
 	.setting_dma		= ls2k1000_mmc_set_external_dma,
@@ -856,6 +881,7 @@ static struct loongson2_mmc_pdata ls2k1000_mmc_pdata = {
 };
 
 static struct loongson2_mmc_pdata ls2k2000_mmc_pdata = {
+	.flags			= 0,
 	.regmap_config		= &ls2k2000_mmc_regmap_config,
 	.reorder_cmd_data	= ls2k2000_mmc_reorder_cmd_data,
 	.fix_data_timeout	= ls2k2000_mmc_fix_data_timeout,
@@ -984,6 +1010,7 @@ static void loongson2_mmc_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id loongson2_mmc_of_ids[] = {
+	{ .compatible = "loongson,ls2k0300-mmc", .data = &ls2k0300_mmc_pdata },
 	{ .compatible = "loongson,ls2k0500-mmc", .data = &ls2k0500_mmc_pdata },
 	{ .compatible = "loongson,ls2k1000-mmc", .data = &ls2k1000_mmc_pdata },
 	{ .compatible = "loongson,ls2k2000-mmc", .data = &ls2k2000_mmc_pdata },
-- 
2.52.0

Re: [PATCH 1/3] dt-bindings: mmc: loongson,ls2k0500-mmc: Add compatible for Loongson-2K0300

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 75 bytes --]

Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: not-applicable

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 228 bytes --]

Re: [PATCH 0/3] mmc: Add Loongson-2K0300 SD/SDIO/eMMC controller support

[Huacai Chen]

For the whole series:
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>

On Tue, Mar 3, 2026 at 7:27 PM Binbin Zhou <zhoubinbin@loongson.cn> wrote:
>
> Hi all:
>
> The patchset describes two MMC controllers of the Loongson-2K0300 SoC,
> one providing an eMMC interface and the other exporting an SD/SDIO
> interface.
>
> Its hardware design is similar to that of the Loongson-2K2000, but it
> suffers from hardware defects such as missing CMD48 interrupts.
>
> Thanks.
> Binbin
>
> Binbin Zhou (3):
>   dt-bindings: mmc: loongson,ls2k0500-mmc: Add compatible for
>     Loongson-2K0300
>   mmc: loongson2: Gathering all SoCs private data together
>   mmc: loongson2: Add Loongson-2K0300 SD/SDIO/eMMC controller driver
>
>  .../bindings/mmc/loongson,ls2k0500-mmc.yaml   |  1 +
>  drivers/mmc/host/loongson2-mmc.c              | 59 ++++++++++++++-----
>  2 files changed, 44 insertions(+), 16 deletions(-)
>
>
> base-commit: 6a4a4c1cc0012590b8bebf6c95d51687d39b420c
> --
> 2.52.0
>

Re: [PATCH 0/3] mmc: Add Loongson-2K0300 SD/SDIO/eMMC controller support

[Ulf Hansson]

On Tue, 3 Mar 2026 at 12:27, Binbin Zhou <zhoubinbin@loongson.cn> wrote:
>
> Hi all:
>
> The patchset describes two MMC controllers of the Loongson-2K0300 SoC,
> one providing an eMMC interface and the other exporting an SD/SDIO
> interface.
>
> Its hardware design is similar to that of the Loongson-2K2000, but it
> suffers from hardware defects such as missing CMD48 interrupts.
>
> Thanks.
> Binbin
>
> Binbin Zhou (3):
>   dt-bindings: mmc: loongson,ls2k0500-mmc: Add compatible for
>     Loongson-2K0300
>   mmc: loongson2: Gathering all SoCs private data together
>   mmc: loongson2: Add Loongson-2K0300 SD/SDIO/eMMC controller driver
>
>  .../bindings/mmc/loongson,ls2k0500-mmc.yaml   |  1 +
>  drivers/mmc/host/loongson2-mmc.c              | 59 ++++++++++++++-----
>  2 files changed, 44 insertions(+), 16 deletions(-)
>
>
> base-commit: 6a4a4c1cc0012590b8bebf6c95d51687d39b420c
> --
> 2.52.0
>

The series applied for next, thanks!

Kind regards
Uffe