There is no need to define MMC DMA TX and RX request numbers locally for
OMAP1xxx and OMAP24xx and assign them non-portable way since they already
come via platform resources. See commits
6c432f7 ("ARM: OMAP1: Pass dma request lines in platform data to MMC driver")
b955eef ("ARM: OMAP2: Use hwmod to initialize mmc for 2420")
Note that mmc_omap_probe doesn't change failure mechanism in case if it
fails get DMA request number or DMA channel. In that case it just falls
back to PIO transfer for TX and/or RX.
Signed-off-by: Jarkko Nikula <jarkko.nikula@xxxxxxxxxx>
---
drivers/mmc/host/omap.c | 39 +++++++++++++--------------------------
1 file changed, 13 insertions(+), 26 deletions(-)
diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index c975051..24235f1 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -90,17 +90,6 @@
#define OMAP_MMC_CMDTYPE_AC 2
#define OMAP_MMC_CMDTYPE_ADTC 3
-#define OMAP_DMA_MMC_TX 21
-#define OMAP_DMA_MMC_RX 22
-#define OMAP_DMA_MMC2_TX 54
-#define OMAP_DMA_MMC2_RX 55
-
-#define OMAP24XX_DMA_MMC2_TX 47
-#define OMAP24XX_DMA_MMC2_RX 48
-#define OMAP24XX_DMA_MMC1_TX 61
-#define OMAP24XX_DMA_MMC1_RX 62
-
-
#define DRIVER_NAME "mmci-omap"
/* Specifies how often in millisecs to poll for card status changes
@@ -1327,7 +1316,6 @@ static int mmc_omap_probe(struct platform_device *pdev)
struct mmc_omap_host *host = NULL;
struct resource *res;
dma_cap_mask_t mask;
- unsigned sig;
int i, ret = 0;
int irq;
@@ -1393,22 +1381,21 @@ static int mmc_omap_probe(struct platform_device *pdev)
host->dma_tx_burst = -1;
host->dma_rx_burst = -1;
- if (mmc_omap2())
- sig = host->id == 0 ? OMAP24XX_DMA_MMC1_TX : OMAP24XX_DMA_MMC2_TX;
- else
- sig = host->id == 0 ? OMAP_DMA_MMC_TX : OMAP_DMA_MMC2_TX;
- host->dma_tx = dma_request_channel(mask, omap_dma_filter_fn, &sig);
+ res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx");
+ if (res)
+ host->dma_tx = dma_request_channel(mask, omap_dma_filter_fn,
+ &res->start);
if (!host->dma_tx)
- dev_warn(host->dev, "unable to obtain TX DMA engine channel %u\n",
- sig);
- if (mmc_omap2())
- sig = host->id == 0 ? OMAP24XX_DMA_MMC1_RX : OMAP24XX_DMA_MMC2_RX;
- else
- sig = host->id == 0 ? OMAP_DMA_MMC_RX : OMAP_DMA_MMC2_RX;
- host->dma_rx = dma_request_channel(mask, omap_dma_filter_fn, &sig);
+ dev_warn(host->dev,
+ "unable to obtain TX DMA. Falling back to PIO\n");
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx");
+ if (res)
+ host->dma_rx = dma_request_channel(mask, omap_dma_filter_fn,
+ &res->start);
if (!host->dma_rx)
- dev_warn(host->dev, "unable to obtain RX DMA engine channel %u\n",
- sig);
+ dev_warn(host->dev,
+ "unable to obtain RX DMA. Falling back to PIO\n");
ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host);
if (ret)
--
1.8.4.2
--
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