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mmc: tmio-mmc: add support for 32bit data port

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For the r7s72100 SOC, the DATA_PORT register was changed to 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@renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Chris Brandt
2016-09-12 10:15:06 -04:00
committed by Ulf Hansson
parent f19417f382
commit 8185e51f35
3 changed files with 47 additions and 0 deletions
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30
drivers/mmc/host/tmio_mmc_pio.c
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@@ -393,6 +393,36 @@ static void tmio_mmc_transfer_data(struct tmio_mmc_host *host,
/*
* Transfer the data
*/
if (host->pdata->flags & TMIO_MMC_32BIT_DATA_PORT) {
u8 data[4] = { };
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,
(u32 *)data, 1);
memcpy(buf8, data, count);
} else {
memcpy(data, buf8, count);
sd_ctrl_write32_rep(host, CTL_SD_DATA_PORT,
(u32 *)data, 1);
}
return;
}
if (is_read)
sd_ctrl_read16_rep(host, CTL_SD_DATA_PORT, buf, count >> 1);
else