[02/10,v2] mmc: tmio: care about DMA tx/rx addr offset

Commit Message

Kuninori Morimoto July 29, 2014, 8:44 a.m. UTC

From: Kuninori Morimoto <[e-mail]>

Basically, SD_BUF0 Tx/Rx addresses are same
in normal TMIO controller,
but, it is different on Renesas R-Car SDHI controller
if it uses DMAC
(Rx address needs to add 0x2000 to Tx address)

This patch adds new .dma_rx_offset and cares it

Acked-by: Laurent Pinchart <[e-mail]>
Acked-by: Ben Dooks <[e-mail]>
Signed-off-by: Kuninori Morimoto <[e-mail]>
---
 drivers/mmc/host/sh_mobile_sdhi.c |    3 +++
 drivers/mmc/host/tmio_mmc_dma.c   |    2 +-
 include/linux/mfd/tmio.h          |    1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index b3baa83..91c6399 100644
--- a/drivers/mmc/host/sh_mobile_sdhi.c
+++ b/drivers/mmc/host/sh_mobile_sdhi.c
@@ -39,6 +39,7 @@  struct sh_mobile_sdhi_of_data {
 	unsigned long tmio_flags;
 	unsigned long capabilities;
 	unsigned long capabilities2;
+	dma_addr_t dma_rx_offset;
 };
 
 static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
@@ -56,6 +57,7 @@  static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
 	.tmio_flags	= TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE,
 	.capabilities	= MMC_CAP_SD_HIGHSPEED | MMC_CAP_SDIO_IRQ,
 	.capabilities2	= MMC_CAP2_NO_2BLKS_READ,
+	.dma_rx_offset	= 0x2000,
 };
 
 static const struct of_device_id sh_mobile_sdhi_of_match[] = {
@@ -228,6 +230,7 @@  static int sh_mobile_sdhi_probe(struct platform_device *pdev)
 		mmc_data->flags |= of_data->tmio_flags;
 		mmc_data->capabilities |= of_data->capabilities;
 		mmc_data->capabilities2 |= of_data->capabilities2;
+		dma_priv->dma_rx_offset = of_data->dma_rx_offset;
 	}
 
 	/* SD control register space size is 0x100, 0x200 for bus_shift=1 */
diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c
index 03e7b28..1925170 100644
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -311,7 +311,7 @@  void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
 		if (pdata->dma->chan_priv_rx)
 			cfg.slave_id = pdata->dma->slave_id_rx;
 		cfg.direction = DMA_DEV_TO_MEM;
-		cfg.src_addr = cfg.dst_addr;
+		cfg.src_addr = cfg.dst_addr + pdata->dma->dma_rx_offset;
 		cfg.dst_addr = 0;
 		ret = dmaengine_slave_config(host->chan_rx, &cfg);
 		if (ret < 0)
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 8f6f2e9..777e29b 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -96,6 +96,7 @@  struct tmio_mmc_dma {
 	int slave_id_tx;
 	int slave_id_rx;
 	int alignment_shift;
+	dma_addr_t dma_rx_offset;
 	bool (*filter)(struct dma_chan *chan, void *arg);
 };