For the r7s72100 SOC, the DATA_PORT register was changed to be 32-bits wide.
Therefore a new flag has been created that will allow 32-bit reads/writes
to the DATA_PORT register instead of 16-bit (because 16-bits accesses are
not supported).
Signed-off-by: Chris Brandt <chris.brandt@xxxxxxxxxxx>
---
v2:
* changed 'data * 0xFF' to 'data & 0xFF'
* added 'const' for sd_ctrl_write32_rep
---
drivers/mmc/host/tmio_mmc.h | 12 ++++++++++++
drivers/mmc/host/tmio_mmc_pio.c | 35 +++++++++++++++++++++++++++++++++++
include/linux/mfd/tmio.h | 5 +++++
3 files changed, 52 insertions(+)
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index ecb99fc..a99e634 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -237,6 +237,12 @@ static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host, int ad
readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
}
+static inline void sd_ctrl_read32_rep(struct tmio_mmc_host *host, int addr,
+ u32 *buf, int count)
+{
+ readsl(host->ctl + (addr << host->bus_shift), buf, count);
+}
+
static inline void sd_ctrl_write16(struct tmio_mmc_host *host, int addr, u16 val)
{
/* If there is a hook and it returns non-zero then there
@@ -259,4 +265,10 @@ static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, int
writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
}
+static inline void sd_ctrl_write32_rep(struct tmio_mmc_host *host, int addr,
+ const u32 *buf, int count)
+{
+ writesl(host->ctl + (addr << host->bus_shift), buf, count);
+}
+
#endif
diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c
index 017a4dc..66a25ec 100644
--- a/drivers/mmc/host/tmio_mmc_pio.c
+++ b/drivers/mmc/host/tmio_mmc_pio.c
@@ -439,10 +439,45 @@ static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
{
int is_read = host->data->flags & MMC_DATA_READ;
u8 *buf8;
+ u32 data;
/*
* Transfer the data
*/
+ if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) {
+ if (is_read)
+ sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
+ count >> 2);
+ else
+ sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, (u32 *)buf,
+ count >> 2);
+
+ /* if count was multiple of 4 */
+ if (!(count & 0x3))
+ return;
+
+ buf8 = (u8 *)(buf + (count >> 2));
+ count %= 4;
+
+ if (is_read) {
+ sd_ctrl_read32_rep(host, CTL_SD_DATA_PORT, &data, 1);
+ while (count--) {
+ *buf8 = data & 0xFF;
+ data = data >> 8;
+ buf8++;
+ }
+ } else {
+ data = *buf8++;
+ if (count > 1)
+ data |= (*buf8++ << 8);
+ if (count > 2)
+ data |= (*buf8++ << 16);
+ sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT, &data, 1);
+ }
+
+ return;
+ }
+
if (is_read)
sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
else
diff --git a/include/linux/mfd/tmio.h b/include/linux/mfd/tmio.h
index 3b95dc7..0dbcb7e 100644
--- a/include/linux/mfd/tmio.h
+++ b/include/linux/mfd/tmio.h
@@ -100,6 +100,11 @@
#define TMIO_MMC_SDIO_STATUS_QUIRK (1 << 8)
/*
+ * Some controllers have a 32-bit wide data port register
+ */
+#define TMIO_MMC_32BIT_DATA_PORT (1 << 9)
+
+/*
* Some controllers allows to set SDx actual clock
*/
#define TMIO_MMC_CLK_ACTUAL (1 << 10)
--
2.9.2
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
