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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2011-08-30 16:26:39 (GMT)
committerChris Ball <cjb@laptop.org>2011-10-26 20:32:09 (GMT)
commit714c4a6e3a0f730834ec8a8bc83b2a6da33f54dc (patch)
tree1e2a581b44fab2b92d21fc52d134719dde003c45
parent67716327eec7e9d573e7cb2d806545d6f7c1a38d (diff)
downloadlinux-714c4a6e3a0f730834ec8a8bc83b2a6da33f54dc.tar.xz
mmc: sh_mmcif: simplify platform data
Provide platforms with a simplified way to specify MMCIF DMA slave IDs in a way, similar to SDHI and other sh_dma clients. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Chris Ball <cjb@laptop.org>
-rw-r--r--drivers/mmc/host/sh_mmcif.c20
-rw-r--r--include/linux/mmc/sh_mmcif.h4
2 files changed, 19 insertions, 5 deletions
diff --git a/drivers/mmc/host/sh_mmcif.c b/drivers/mmc/host/sh_mmcif.c
index 557886b..bd91c94 100644
--- a/drivers/mmc/host/sh_mmcif.c
+++ b/drivers/mmc/host/sh_mmcif.c
@@ -165,6 +165,8 @@ struct sh_mmcif_host {
struct mmc_host *mmc;
struct mmc_data *data;
struct platform_device *pd;
+ struct sh_dmae_slave dma_slave_tx;
+ struct sh_dmae_slave dma_slave_rx;
struct clk *hclk;
unsigned int clk;
int bus_width;
@@ -323,25 +325,35 @@ static bool sh_mmcif_filter(struct dma_chan *chan, void *arg)
static void sh_mmcif_request_dma(struct sh_mmcif_host *host,
struct sh_mmcif_plat_data *pdata)
{
+ struct sh_dmae_slave *tx, *rx;
host->dma_active = false;
/* We can only either use DMA for both Tx and Rx or not use it at all */
if (pdata->dma) {
+ dev_warn(&host->pd->dev,
+ "Update your platform to use embedded DMA slave IDs\n");
+ tx = &pdata->dma->chan_priv_tx;
+ rx = &pdata->dma->chan_priv_rx;
+ } else {
+ tx = &host->dma_slave_tx;
+ tx->slave_id = pdata->slave_id_tx;
+ rx = &host->dma_slave_rx;
+ rx->slave_id = pdata->slave_id_rx;
+ }
+ if (tx->slave_id > 0 && rx->slave_id > 0) {
dma_cap_mask_t mask;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
- host->chan_tx = dma_request_channel(mask, sh_mmcif_filter,
- &pdata->dma->chan_priv_tx);
+ host->chan_tx = dma_request_channel(mask, sh_mmcif_filter, tx);
dev_dbg(&host->pd->dev, "%s: TX: got channel %p\n", __func__,
host->chan_tx);
if (!host->chan_tx)
return;
- host->chan_rx = dma_request_channel(mask, sh_mmcif_filter,
- &pdata->dma->chan_priv_rx);
+ host->chan_rx = dma_request_channel(mask, sh_mmcif_filter, rx);
dev_dbg(&host->pd->dev, "%s: RX: got channel %p\n", __func__,
host->chan_rx);
diff --git a/include/linux/mmc/sh_mmcif.h b/include/linux/mmc/sh_mmcif.h
index 0222cd8..04ff452 100644
--- a/include/linux/mmc/sh_mmcif.h
+++ b/include/linux/mmc/sh_mmcif.h
@@ -41,7 +41,9 @@ struct sh_mmcif_plat_data {
void (*set_pwr)(struct platform_device *pdev, int state);
void (*down_pwr)(struct platform_device *pdev);
int (*get_cd)(struct platform_device *pdef);
- struct sh_mmcif_dma *dma;
+ struct sh_mmcif_dma *dma; /* Deprecated. Instead */
+ unsigned int slave_id_tx; /* use embedded slave_id_[tr]x */
+ unsigned int slave_id_rx;
u8 sup_pclk; /* 1 :SH7757, 0: SH7724/SH7372 */
unsigned long caps;
u32 ocr;