diff options
| author | Ulf Hansson <(address hidden)> | 2011-11-08 10:52:49 +0100 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2012-01-05 10:15:54 +0000 |
| commit | 714e9189f9c50113b36aa4d14879538eead13c8c (patch) | |
| tree | 9657fc7371527c12b98b83417d663674efe7f299 /drivers/mmc | |
| parent | 6c52813664512cadf1a6ac2dcc933f959876b657 (diff) | |
mmci: Support non-power-of-two block sizes for ux500v2 variant
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 <(address hidden)>
Signed-off-by: Ulf Hansson <(address hidden)>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | 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 0726e59fd41..fe881106cdc 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -53,6 +53,7 @@ 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; @@ -63,6 +64,7 @@ struct variant_data { bool sdio; bool st_clkdiv; bool blksz_datactrl16; + bool non_power_of_2_blksize; }; static struct variant_data variant_arm = { @@ -104,6 +106,7 @@ static struct variant_data variant_ux500v2 = { .sdio = true, .st_clkdiv = true, .blksz_datactrl16 = true, + .non_power_of_2_blksize = true, }; /* @@ -594,7 +597,6 @@ 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); @@ -980,11 +982,14 @@ 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; |