mmc: omap_hsmmc: split dma setup

split start dma function into setup and start dma to keep track of
host_cookie when cmd23 support is enabled along with async request.

Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Chris Ball <chris@printf.net>

1 files changed, 18 insertions, 8 deletions

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 40914f570585..cdeca5e6fae4 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1285,7 +1285,7 @@ static int omap_hsmmc_pre_dma_transfer(struct omap_hsmmc_host *host,
 /*
  * Routine to configure and start DMA for the MMC card
  */
-static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host,
+static int omap_hsmmc_setup_dma_transfer(struct omap_hsmmc_host *host,
                                         struct mmc_request *req)
 {
         struct dma_slave_config cfg;
@@ -1344,8 +1344,6 @@ static int omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host,
 
         host->dma_ch = 1;
 
-        dma_async_issue_pending(chan);
-
         return 0;
 }
 
@@ -1386,6 +1384,21 @@ static void set_data_timeout(struct omap_hsmmc_host *host,
         OMAP_HSMMC_WRITE(host->base, SYSCTL, reg);
 }
 
+static void omap_hsmmc_start_dma_transfer(struct omap_hsmmc_host *host)
+{
+        struct mmc_request *req = host->mrq;
+        struct dma_chan *chan;
+
+        if (!req->data)
+                return;
+        OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz)
+                                | (req->data->blocks << 16));
+        set_data_timeout(host, req->data->timeout_ns,
+                                req->data->timeout_clks);
+        chan = omap_hsmmc_get_dma_chan(host, req->data);
+        dma_async_issue_pending(chan);
+}
+
 /*
  * Configure block length for MMC/SD cards and initiate the transfer.
  */
@@ -1406,12 +1419,8 @@ omap_hsmmc_prepare_data(struct omap_hsmmc_host *host, struct mmc_request *req)
                 return 0;
         }
 
-        OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz)
-                                        | (req->data->blocks << 16));
-        set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks);
-
         if (host->use_dma) {
-                ret = omap_hsmmc_start_dma_transfer(host, req);
+                ret = omap_hsmmc_setup_dma_transfer(host, req);
                 if (ret != 0) {
                         dev_err(mmc_dev(host->mmc), "MMC start dma failure\n");
                         return ret;
@@ -1496,6 +1505,7 @@ static void omap_hsmmc_request(struct mmc_host *mmc, struct mmc_request *req)
                 return;
         }
 
+        omap_hsmmc_start_dma_transfer(host);
         omap_hsmmc_start_command(host, req->cmd, req->data);
 }