The SDHI/MMC controller in the RZ/A2 is almost the same as R-Car gen3, but
with some minor differences.
Signed-off-by: Chris Brandt <chris.brandt@xxxxxxxxxxx>
---
drivers/mmc/host/Kconfig | 5 +++--
drivers/mmc/host/renesas_sdhi_internal_dmac.c | 28 +++++++++++++++++++++++++--
2 files changed, 29 insertions(+), 4 deletions(-)
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index cf984f0f0246..33840ce2221d 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -636,13 +636,14 @@ config MMC_SDHI_SYS_DMAC
config MMC_SDHI_INTERNAL_DMAC
tristate "DMA for SDHI SD/SDIO controllers using on-chip bus mastering"
- depends on ARM64 || COMPILE_TEST
+ depends on ARM64 || ARCH_R7S9210 || COMPILE_TEST
depends on MMC_SDHI
default MMC_SDHI if ARM64
help
This provides DMA support for SDHI SD/SDIO controllers
using on-chip bus mastering. This supports the controllers
- found in arm64 based SoCs.
+ found in arm64 based SoCs. This controller is also found in
+ RZ/A2 series SoCs.
config MMC_UNIPHIER
tristate "UniPhier SD/eMMC Host Controller support"
diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
index e5e5015ca680..19c32ea237dd 100644
--- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c
+++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c
@@ -34,7 +34,7 @@
#define DTRAN_MODE_CH_NUM_CH0 0 /* "downstream" = for write commands */
#define DTRAN_MODE_CH_NUM_CH1 BIT(16) /* "upstream" = for read commands */
#define DTRAN_MODE_BUS_WIDTH (BIT(5) | BIT(4))
-#define DTRAN_MODE_ADDR_MODE BIT(0) /* 1 = Increment address */
+#define DTRAN_MODE_ADDR_MODE BIT(0) /* 1 = Increment address, 0 = Fixed */
/* DM_CM_DTRAN_CTRL */
#define DTRAN_CTRL_DM_START BIT(0)
@@ -73,6 +73,9 @@ static unsigned long global_flags;
#define SDHI_INTERNAL_DMAC_ONE_RX_ONLY 0
#define SDHI_INTERNAL_DMAC_RX_IN_USE 1
+/* RZ/A2 does not have this bit (not safe to set it) */
+#define SDHI_INTERNAL_DMAC_ADRR_MODE_FIXED 2
+
/* Definitions for sampling clocks */
static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = {
{
@@ -81,6 +84,21 @@ static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = {
},
};
+static const struct renesas_sdhi_of_data of_rza2_compatible = {
+ .tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_CLK_ACTUAL |
+ TMIO_MMC_HAVE_CBSY,
+ .tmio_ocr_mask = MMC_VDD_32_33,
+ .capabilities = MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ |
+ MMC_CAP_CMD23,
+ .bus_shift = 2,
+ .scc_offset = (0 - 0x1000),
+ .taps = rcar_gen3_scc_taps,
+ .taps_num = ARRAY_SIZE(rcar_gen3_scc_taps),
+ /* DMAC can handle 0xffffffff blk count but only 1 segment */
+ .max_blk_count = 0xffffffff,
+ .max_segs = 1,
+};
+
static const struct renesas_sdhi_of_data of_rcar_r8a7795_compatible = {
.tmio_flags = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_CLK_ACTUAL |
TMIO_MMC_HAVE_CBSY | TMIO_MMC_MIN_RCAR2 |
@@ -113,6 +131,7 @@ static const struct renesas_sdhi_of_data of_rcar_gen3_compatible = {
};
static const struct of_device_id renesas_sdhi_internal_dmac_of_match[] = {
+ { .compatible = "renesas,sdhi-r7s9210", .data = &of_rza2_compatible, },
{ .compatible = "renesas,sdhi-r8a7795", .data = &of_rcar_r8a7795_compatible, },
{ .compatible = "renesas,sdhi-r8a7796", .data = &of_rcar_r8a7795_compatible, },
{ .compatible = "renesas,rcar-gen3-sdhi", .data = &of_rcar_gen3_compatible, },
@@ -171,7 +190,10 @@ renesas_sdhi_internal_dmac_start_dma(struct tmio_mmc_host *host,
struct mmc_data *data)
{
struct scatterlist *sg = host->sg_ptr;
- u32 dtran_mode = DTRAN_MODE_BUS_WIDTH | DTRAN_MODE_ADDR_MODE;
+ u32 dtran_mode = DTRAN_MODE_BUS_WIDTH;
+
+ if (!test_bit(SDHI_INTERNAL_DMAC_ADRR_MODE_FIXED, &global_flags))
+ dtran_mode |= DTRAN_MODE_ADDR_MODE;
if (!dma_map_sg(&host->pdev->dev, sg, host->sg_len,
mmc_get_dma_dir(data)))
@@ -290,6 +312,8 @@ static const struct tmio_mmc_dma_ops renesas_sdhi_internal_dmac_dma_ops = {
*/
static const struct soc_device_attribute gen3_soc_whitelist[] = {
/* specific ones */
+ { .soc_id = "r7s9210",
+ .data = (void *)BIT(SDHI_INTERNAL_DMAC_ADRR_MODE_FIXED) },
{ .soc_id = "r8a7795", .revision = "ES1.*",
.data = (void *)BIT(SDHI_INTERNAL_DMAC_ONE_RX_ONLY) },
{ .soc_id = "r8a7796", .revision = "ES1.0",
--
2.16.1
