From 6322cdd0eb22e016aeced886c2046d115139c962 Mon Sep 17 00:00:00 2001 From: Philip Rakity Date: Fri, 13 May 2011 11:17:15 +0530 Subject: [PATCH] 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 Reviewed-by: Arindam Nath Signed-off-by: Chris Ball --- drivers/mmc/host/sdhci.c | 33 ++++++++++++++++++--------------- drivers/mmc/host/sdhci.h | 2 ++ 2 files changed, 20 insertions(+), 15 deletions(-) diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index fa3301644b15..cc63f5ed2310 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 8ea11b7cf89a..7e28eec97f04 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