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-rw-r--r--drivers/mfd/sh_mobile_sdhi.c6
-rw-r--r--drivers/mmc/host/tmio_mmc.c17
-rw-r--r--include/linux/mfd/tmio.h5
3 files changed, 23 insertions, 5 deletions
diff --git a/drivers/mfd/sh_mobile_sdhi.c b/drivers/mfd/sh_mobile_sdhi.c
index 01d83a4..f1714f9 100644
--- a/drivers/mfd/sh_mobile_sdhi.c
+++ b/drivers/mfd/sh_mobile_sdhi.c
@@ -125,6 +125,12 @@ static int __devinit sh_mobile_sdhi_probe(struct platform_device *pdev)
mmc_data->capabilities |= p->tmio_caps;
}
+ /*
+ * All SDHI blocks support 2-byte and larger block sizes in 4-bit
+ * bus width mode.
+ */
+ mmc_data->flags |= TMIO_MMC_BLKSZ_2BYTES;
+
if (p && p->dma_slave_tx >= 0 && p->dma_slave_rx >= 0) {
priv->param_tx.slave_id = p->dma_slave_tx;
priv->param_rx.slave_id = p->dma_slave_rx;
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index 1a47221..e7765a8 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -658,14 +658,21 @@ static void tmio_mmc_release_dma(struct tmio_mmc_host *host)
static int tmio_mmc_start_data(struct tmio_mmc_host *host,
struct mmc_data *data)
{
+ struct mfd_cell *cell = host->pdev->dev.platform_data;
+ struct tmio_mmc_data *pdata = cell->driver_data;
+
pr_debug("setup data transfer: blocksize %08x nr_blocks %d\n",
data->blksz, data->blocks);
- /* Hardware cannot perform 1 and 2 byte requests in 4 bit mode */
- if (data->blksz < 4 && host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
- pr_err("%s: %d byte block unsupported in 4 bit mode\n",
- mmc_hostname(host->mmc), data->blksz);
- return -EINVAL;
+ /* Some hardware cannot perform 2 byte requests in 4 bit mode */
+ if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4) {
+ int blksz_2bytes = pdata->flags & TMIO_MMC_BLKSZ_2BYTES;
+
+ if (data->blksz < 2 || (data->blksz < 4 && !blksz_2bytes)) {
+ pr_err("%s: %d byte block unsupported in 4 bit mode\n",
+ mmc_hostname(host->mmc), data->blksz);
+ return -EINVAL;
+ }
}
tmio_mmc_init_sg(host, data);
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 24c43bb..085f041 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -52,6 +52,11 @@
/* tmio MMC platform flags */
#define TMIO_MMC_WRPROTECT_DISABLE (1 << 0)
+/*
+ * Some controllers can support a 2-byte block size when the bus width
+ * is configured in 4-bit mode.
+ */
+#define TMIO_MMC_BLKSZ_2BYTES (1 << 1)
int tmio_core_mmc_enable(void __iomem *cnf, int shift, unsigned long base);
int tmio_core_mmc_resume(void __iomem *cnf, int shift, unsigned long base);