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| author | Dong Aisheng <b29396@freescale.com> | 2013-10-30 22:09:49 +0800 |
|---|---|---|
| committer | Chris Ball <cjb@laptop.org> | 2013-11-26 16:34:03 -0500 |
| commit | 7dd109ef4f58ca09c18809e981658ffeaca471f8 (patch) | |
| tree | 124c42bf079a7aef6c07de9a4a7f6278b5222679 /drivers/mmc/host | |
| parent | 2b558c13df82b2ede7a016f00bc9ebf534ddb301 (diff) | |
| download | linux-7dd109ef4f58ca09c18809e981658ffeaca471f8.tar.gz linux-7dd109ef4f58ca09c18809e981658ffeaca471f8.tar.bz2 linux-7dd109ef4f58ca09c18809e981658ffeaca471f8.zip | |
mmc: sdhci-esdhc-imx: add SDHCI_TRANSFER_MODE read function
Used to read out the correct value of SDHCI_TRANSFER_MODE register
for upper layer.
Signed-off-by: Dong Aisheng <b29396@freescale.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/sdhci-esdhc-imx.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 461a4c3f4ef7..2be77e0dcc4e 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -385,6 +385,22 @@ static u16 esdhc_readw_le(struct sdhci_host *host, int reg) return ret; } + if (unlikely(reg == SDHCI_TRANSFER_MODE)) { + if (esdhc_is_usdhc(imx_data)) { + u32 m = readl(host->ioaddr + ESDHC_MIX_CTRL); + ret = m & ESDHC_MIX_CTRL_SDHCI_MASK; + /* Swap AC23 bit */ + if (m & ESDHC_MIX_CTRL_AC23EN) { + ret &= ~ESDHC_MIX_CTRL_AC23EN; + ret |= SDHCI_TRNS_AUTO_CMD23; + } + } else { + ret = readw(host->ioaddr + SDHCI_TRANSFER_MODE); + } + + return ret; + } + return readw(host->ioaddr + reg); } |