From: Kuninori Morimoto Date: Mon, 25 Aug 2014 02:58:48 +0000 (-0700) Subject: mmc: tmio: care about DMA tx/rx addr offset X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=384b2cbd56a02efb16358ed7c0c039e4afca5ed0;p=deliverable%2Flinux.git 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 Tested-by: Hiep Cao Minh Acked-by: Laurent Pinchart Acked-by: Ben Dooks Signed-off-by: Kuninori Morimoto Signed-off-by: Ulf Hansson --- diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c index 2dafe28c8df9..f0818cd0242c 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_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 eb8f1d5c34b1..bd646b041085 100644 --- 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 8f6f2e91e7ae..777e29b1ad0f 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); };