1 files changed, 13 insertions, 2 deletions

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 1ca5e72ceb65..5a600b3b3199 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -405,11 +405,23 @@ static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len)
 static int dw_mci_idmac_init(struct dw_mci *host)
 {
         struct idmac_desc *p;
-        int i;
+        int i, dma_support;
 
         /* Number of descriptors in the ring buffer */
         host->ring_size = PAGE_SIZE / sizeof(struct idmac_desc);
 
+        /* Check if Hardware Configuration Register has support for DMA */
+        dma_support = (mci_readl(host, HCON) >> 16) & 0x3;
+
+        if (!dma_support || dma_support > 2) {
+                dev_err(&host->dev,
+                        "Host Controller does not support IDMA Tx.\n");
+                host->dma_ops = NULL;
+                return -ENODEV;
+        }
+
+        dev_info(&host->dev, "Using internal DMA controller.\n");
+
         /* Forward link the descriptor list */
         for (i = 0, p = host->sg_cpu; i < host->ring_size - 1; i++, p++)
                 p->des3 = host->sg_dma + (sizeof(struct idmac_desc) * (i + 1));
@@ -1876,7 +1888,6 @@ static void dw_mci_init_dma(struct dw_mci *host)
         /* Determine which DMA interface to use */
 #ifdef CONFIG_MMC_DW_IDMAC
         host->dma_ops = &dw_mci_idmac_ops;
-        dev_info(&host->dev, "Using internal DMA controller.\n");
 #endif
 
         if (!host->dma_ops)