mmc: tmio: care about DMA tx/rx addr offset

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

Tested-by: Nguyen Xuan Nui <nx-nui@jinso.co.jp>
Tested-by: Hiep Cao Minh <cm-hiep@jinso.co.jp>
Acked-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit 384b2cbd56a02efb16358ed7c0c039e4afca5ed0)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
index e332db8..19512d3 100644 (file)
--- 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_MULTI_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 eb8f1d5..bd646b0 100644 (file)
--- a/drivers/mmc/host/tmio_mmc_dma.c
+++ b/drivers/mmc/host/tmio_mmc_dma.c
@@ -312,7 +312,7 @@ 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.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
                cfg.dst_addr = 0;
                ret = dmaengine_slave_config(host->chan_rx, &cfg);

diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 8f6f2e9..777e29b 100644 (file)
--- 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);
 };