[U-Boot] [PATCH V2] i.MX: fsl_esdhc: allow use with cache enabled.

[Eric Nelson]

Signed-off-by: Eric Nelson <eric.nel...@boundarydevices.com>
---
V2 fixes checkpatch errors and typecasts as pointed out on the ML.

 drivers/mmc/fsl_esdhc.c |   17 ++++++++++++++++-
 1 files changed, 16 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index a2f35e3..539d848 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -190,6 +190,10 @@ static int esdhc_setup_data(struct mmc *mmc, struct 
mmc_data *data)
                esdhc_clrsetbits32(&regs->wml, WML_RD_WML_MASK, wml_value);
                esdhc_write32(&regs->dsaddr, (u32)data->dest);
        } else {
+               flush_dcache_range((ulong)data->src,
+                                  (ulong)data->src+data->blocks
+                                        *data->blocksize);
+
                if (wml_value > WML_WR_WML_MAX)
                        wml_value = WML_WR_WML_MAX_VAL;
                if ((esdhc_read32(&regs->prsstat) & PRSSTAT_WPSPL) == 0) {
@@ -249,7 +253,15 @@ static int esdhc_setup_data(struct mmc *mmc, struct 
mmc_data *data)
        return 0;
 }
 
-
+static void check_and_invalidate_dcache_range
+       (struct mmc_cmd *cmd,
+        struct mmc_data *data) {
+       unsigned start = (unsigned)data->dest ;
+       unsigned size = roundup(ARCH_DMA_MINALIGN,
+                               data->blocks*data->blocksize);
+       unsigned end = start+size ;
+       invalidate_dcache_range(start, end);
+}
 /*
  * Sends a command out on the bus.  Takes the mmc pointer,
  * a command pointer, and an optional data pointer.
@@ -311,6 +323,9 @@ esdhc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct 
mmc_data *data)
        while (!(esdhc_read32(&regs->irqstat) & IRQSTAT_CC))
                ;
 
+       if (data && (data->flags & MMC_DATA_READ))
+               check_and_invalidate_dcache_range(cmd, data);
+
        irqstat = esdhc_read32(&regs->irqstat);
        esdhc_write32(&regs->irqstat, irqstat);
 
-- 
1.7.9

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