[U-Boot] [PATCH V2] i.MX: fsl_esdhc: allow use with cache enabled.
Eric Nelson
eric.nelson at boundarydevices.com
Thu Apr 26 02:28:48 CEST 2012
Signed-off-by: Eric Nelson <eric.nelson at 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(®s->wml, WML_RD_WML_MASK, wml_value);
esdhc_write32(®s->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(®s->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(®s->irqstat) & IRQSTAT_CC))
;
+ if (data && (data->flags & MMC_DATA_READ))
+ check_and_invalidate_dcache_range(cmd, data);
+
irqstat = esdhc_read32(®s->irqstat);
esdhc_write32(®s->irqstat, irqstat);
--
1.7.9
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