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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>
This commit is contained in:
Kuninori Morimoto 2014-08-24 19:58:48 -07:00 committed by Ulf Hansson
parent 341eb6a4e7
commit 384b2cbd56
3 changed files with 5 additions and 1 deletions
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3
drivers/mmc/host/sh_mobile_sdhi.c
View File

@ -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 */

2
drivers/mmc/host/tmio_mmc_dma.c
View File

@ -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);

1
include/linux/mfd/tmio.h
View File

@ -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);
};