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mmc: tmio: enable SoC specific DMA buswidth settings 

Renesas SDHI which is based on TMIO driver has 2 type SoC. 1st one is
used as SH-Mobile series, and 2nd is R-Car series. R-Car series SoC has
DMA buswidth setting register which enables 32bit access.
This patch adds .dma_buswidth and enables it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Kuninori Morimoto 2015-01-13 04:59:14 +00:00 committed by Ulf Hansson
parent 5add2aca3a
commit 361936ef03
2 changed files with 8 additions and 2 deletions
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2
drivers/mmc/host/tmio_mmc.h
View File

@ -16,6 +16,7 @@
#ifndef TMIO_MMC_H
#define TMIO_MMC_H
#include <linux/dmaengine.h>
#include <linux/highmem.h>
#include <linux/mmc/tmio.h>
#include <linux/mutex.h>
@ -46,6 +47,7 @@ struct tmio_mmc_dma {
void *chan_priv_rx;
int slave_id_tx;
int slave_id_rx;
enum dma_slave_buswidth dma_buswidth;
bool (*filter)(struct dma_chan *chan, void *arg);
void (*enable)(struct tmio_mmc_host *host, bool enable);
};

8
drivers/mmc/host/tmio_mmc_dma.c
View File

@ -293,7 +293,9 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
cfg.slave_id = host->dma->slave_id_tx;
cfg.direction = DMA_MEM_TO_DEV;
cfg.dst_addr = res->start + (CTL_SD_DATA_PORT << host->bus_shift);
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
cfg.dst_addr_width = host->dma->dma_buswidth;
if (!cfg.dst_addr_width)
cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
cfg.src_addr = 0;
ret = dmaengine_slave_config(host->chan_tx, &cfg);
if (ret < 0)
@ -312,7 +314,9 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
cfg.slave_id = host->dma->slave_id_rx;
cfg.direction = DMA_DEV_TO_MEM;
cfg.src_addr = cfg.dst_addr + host->pdata->dma_rx_offset;
cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
cfg.src_addr_width = host->dma->dma_buswidth;
if (!cfg.src_addr_width)
cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
cfg.dst_addr = 0;
ret = dmaengine_slave_config(host->chan_rx, &cfg);
if (ret < 0)