For the ux500v2 variant of the PL18x block, any block sizes are
supported. This will make it possible to decrease data overhead
for SDIO transfers.
This patch is based upon a patch from Stefan Nilsson.
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxxxxxx>
---
drivers/mmc/host/mmci.c | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 94c04c3..1c6c874 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -57,6 +57,7 @@ static unsigned int fmax = 515633;
* @pwrreg_powerup: power up value for MMCIPOWER register
* @signal_direction: input/out direction of bus signals can be indicated
* @pwrreg_ctrl_power: bits in MMCIPOWER register controls ext. power supply
+ * @any_blksize: true if block any sizes are supported
*/
struct variant_data {
unsigned int clkreg;
@@ -71,6 +72,7 @@ struct variant_data {
u32 pwrreg_powerup;
bool signal_direction;
bool pwrreg_ctrl_power;
+ bool any_blksize;
};
static struct variant_data variant_arm = {
@@ -124,6 +126,7 @@ static struct variant_data variant_ux500v2 = {
.blksz_datactrl16 = true,
.pwrreg_powerup = MCI_PWR_ON,
.signal_direction = true,
+ .any_blksize = true,
};
/*
@@ -132,10 +135,12 @@ static struct variant_data variant_ux500v2 = {
static int mmci_validate_data(struct mmci_host *host,
struct mmc_data *data)
{
+ struct variant_data *variant = host->variant;
+
if (!data)
return 0;
- if (!is_power_of_2(data->blksz)) {
+ if (!is_power_of_2(data->blksz) && !variant->any_blksize) {
dev_err(mmc_dev(host->mmc),
"unsupported block size (%d bytes)\n", data->blksz);
return -EINVAL;
@@ -669,7 +674,6 @@ static void mmci_start_data(struct mmci_host *host, struct mmc_data *data)
writel(host->size, base + MMCIDATALENGTH);
blksz_bits = ffs(data->blksz) - 1;
- BUG_ON(1 << blksz_bits != data->blksz);
if (variant->blksz_datactrl16)
datactrl = MCI_DPSM_ENABLE | (data->blksz << 16);
--
1.7.5.4
--
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