From: Stefan Nilsson XK <stefan.xk.nilsson@xxxxxxxxxxxxxx>
For the ux500v2 variant of the PL18x block, non power of two block
sizes are supported. This will make it possible to decrease data
overhead for SDIO transfers.
Signed-off-by: Stefan Nilsson XK <stefan.xk.nilsson@xxxxxxxxxxxxxx>
Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxxxxxx>
---
drivers/mmc/host/mmci.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 8831b2f..f1d27d9 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -52,6 +52,7 @@ static unsigned int fmax = 515633;
* @sdio: variant supports SDIO
* @st_clkdiv: true if using a ST-specific clock divider algorithm
* @blksz_datactrl16: true if Block size is at b16..b30 position in datactrl register
+ * @non_power_of_2_blksize: true if block sizes can be other than power of two
*/
struct variant_data {
unsigned int clkreg;
@@ -62,6 +63,7 @@ struct variant_data {
bool sdio;
bool st_clkdiv;
bool blksz_datactrl16;
+ bool non_power_of_2_blksize;
};
static struct variant_data variant_arm = {
@@ -103,6 +105,7 @@ static struct variant_data variant_ux500v2 = {
.sdio = true,
.st_clkdiv = true,
.blksz_datactrl16 = true,
+ .non_power_of_2_blksize = true,
};
/*
@@ -592,7 +595,6 @@ 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);
@@ -989,11 +991,14 @@ static irqreturn_t mmci_irq(int irq, void *dev_id)
static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct mmci_host *host = mmc_priv(mmc);
+ struct variant_data *variant = host->variant;
unsigned long flags;
WARN_ON(host->mrq != NULL);
- if (mrq->data && !is_power_of_2(mrq->data->blksz)) {
+ if (mrq->data &&
+ !variant->non_power_of_2_blksize &&
+ !is_power_of_2(mrq->data->blksz)) {
dev_err(mmc_dev(mmc), "unsupported block size (%d bytes)\n",
mrq->data->blksz);
mrq->cmd->error = -EINVAL;
--
1.7.5.4
--
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