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authorPhilip Rakity <prakity@marvell.com>2011-05-13 11:17:15 +0530
committerChris Ball <cjb@laptop.org>2011-05-24 23:53:57 -0400
commit6322cdd0eb22e016aeced886c2046d115139c962 (patch)
tree8ab17b8220413f828b0edaceb1f0964b4ecf7dab /drivers/mmc
parenta8e6df7343cf67c9104955da0de70075a6ee1dfd (diff)
downloadop-kernel-dev-6322cdd0eb22e016aeced886c2046d115139c962.zip
op-kernel-dev-6322cdd0eb22e016aeced886c2046d115139c962.tar.gz
mmc: sdhci: add hooks for setting UHS in platform specific code
Allow platform specific code to set UHS registers if implementation requires speciial platform specific handling Signed-off-by: Philip Rakity <prakity@marvell.com> Reviewed-by: Arindam Nath <arindam.nath@amd.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci.c33
-rw-r--r--drivers/mmc/host/sdhci.h2
2 files changed, 20 insertions, 15 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index fa33016..cc63f5e 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1346,27 +1346,30 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
sdhci_set_clock(host, clock);
}
- ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
-
- /* Select Bus Speed Mode for host */
- ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
- if (ios->timing == MMC_TIMING_UHS_SDR12)
- ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
- else if (ios->timing == MMC_TIMING_UHS_SDR25)
- ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
- else if (ios->timing == MMC_TIMING_UHS_SDR50)
- ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
- else if (ios->timing == MMC_TIMING_UHS_SDR104)
- ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
- else if (ios->timing == MMC_TIMING_UHS_DDR50)
- ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
/* Reset SD Clock Enable */
clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
clk &= ~SDHCI_CLOCK_CARD_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
- sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
+ if (host->ops->set_uhs_signaling)
+ host->ops->set_uhs_signaling(host, ios->timing);
+ else {
+ ctrl_2 = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+ /* Select Bus Speed Mode for host */
+ ctrl_2 &= ~SDHCI_CTRL_UHS_MASK;
+ if (ios->timing == MMC_TIMING_UHS_SDR12)
+ ctrl_2 |= SDHCI_CTRL_UHS_SDR12;
+ else if (ios->timing == MMC_TIMING_UHS_SDR25)
+ ctrl_2 |= SDHCI_CTRL_UHS_SDR25;
+ else if (ios->timing == MMC_TIMING_UHS_SDR50)
+ ctrl_2 |= SDHCI_CTRL_UHS_SDR50;
+ else if (ios->timing == MMC_TIMING_UHS_SDR104)
+ ctrl_2 |= SDHCI_CTRL_UHS_SDR104;
+ else if (ios->timing == MMC_TIMING_UHS_DDR50)
+ ctrl_2 |= SDHCI_CTRL_UHS_DDR50;
+ sdhci_writew(host, ctrl_2, SDHCI_HOST_CONTROL2);
+ }
/* Re-enable SD Clock */
clock = host->clock;
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 8ea11b7..7e28eec 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -270,6 +270,8 @@ struct sdhci_ops {
unsigned int (*get_ro)(struct sdhci_host *host);
void (*platform_reset_enter)(struct sdhci_host *host, u8 mask);
void (*platform_reset_exit)(struct sdhci_host *host, u8 mask);
+ int (*set_uhs_signaling)(struct sdhci_host *host, unsigned int uhs);
+
};
#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
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