omap_hsmmc: Fix MMC3 dma

Data transfers on third OMAP3 MMC controller don't work
because DMA line numbers are only defined for MMC1 and MMC2.
Fix that and store line numbers in mmc_omap_host structure
to reduce code size.
Tested on OMAP3 pandora board.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 25 insertions, 11 deletions

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 283265154944..61883093e25b 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -100,6 +100,7 @@
  */
 #define OMAP_MMC1_DEVID         0
 #define OMAP_MMC2_DEVID         1
+#define OMAP_MMC3_DEVID         2
 
 #define MMC_TIMEOUT_MS          20
 #define OMAP_MMC_MASTER_CLOCK   96000000
@@ -144,6 +145,7 @@ struct mmc_omap_host {
         int                     irq;
         int                     carddetect;
         int                     use_dma, dma_ch;
+        int                     dma_line_tx, dma_line_rx;
         int                     slot_id;
         int                     dbclk_enabled;
         int                     response_busy;
@@ -602,17 +604,10 @@ static int mmc_omap_get_dma_sync_dev(struct mmc_omap_host *host,
 {
         int sync_dev;
 
-        if (data->flags & MMC_DATA_WRITE) {
-                if (host->id == OMAP_MMC1_DEVID)
-                        sync_dev = OMAP24XX_DMA_MMC1_TX;
-                else
-                        sync_dev = OMAP24XX_DMA_MMC2_TX;
-        } else {
-                if (host->id == OMAP_MMC1_DEVID)
-                        sync_dev = OMAP24XX_DMA_MMC1_RX;
-                else
-                        sync_dev = OMAP24XX_DMA_MMC2_RX;
-        }
+        if (data->flags & MMC_DATA_WRITE)
+                sync_dev = host->dma_line_tx;
+        else
+                sync_dev = host->dma_line_rx;
         return sync_dev;
 }
 
@@ -1075,6 +1070,25 @@ static int __init omap_mmc_probe(struct platform_device *pdev)
 
         omap_hsmmc_init(host);
 
+        /* Select DMA lines */
+        switch (host->id) {
+        case OMAP_MMC1_DEVID:
+                host->dma_line_tx = OMAP24XX_DMA_MMC1_TX;
+                host->dma_line_rx = OMAP24XX_DMA_MMC1_RX;
+                break;
+        case OMAP_MMC2_DEVID:
+                host->dma_line_tx = OMAP24XX_DMA_MMC2_TX;
+                host->dma_line_rx = OMAP24XX_DMA_MMC2_RX;
+                break;
+        case OMAP_MMC3_DEVID:
+                host->dma_line_tx = OMAP34XX_DMA_MMC3_TX;
+                host->dma_line_rx = OMAP34XX_DMA_MMC3_RX;
+                break;
+        default:
+                dev_err(mmc_dev(host->mmc), "Invalid MMC id\n");
+                goto err_irq;
+        }
+
         /* Request IRQ for MMC operations */
         ret = request_irq(host->irq, mmc_omap_irq, IRQF_DISABLED,
                         mmc_hostname(mmc), host);