From 86cd4f5f83acbfa481c513c74666ad360b49d73b Mon Sep 17 00:00:00 2001 From: Kyungmin Park Date: Tue, 17 Nov 2009 08:41:23 +0100 Subject: ARM: S5PC1xx: add platform helpers for SDHCI host controllers Samsung S5PC100 has 3 SDHCI controllers compatible with the one known from previous SoCs series. Add required platform setup and support code that the devices can be used with sdhci-s3c driver. Signed-off-by: Kyungmin Park Signed-off-by: Marek Szyprowski Signed-off-by: Ben Dooks --- arch/arm/mach-s5pc100/setup-sdhci.c | 65 +++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 arch/arm/mach-s5pc100/setup-sdhci.c (limited to 'arch/arm/mach-s5pc100/setup-sdhci.c') diff --git a/arch/arm/mach-s5pc100/setup-sdhci.c b/arch/arm/mach-s5pc100/setup-sdhci.c new file mode 100644 index 000000000000..4385986a3da0 --- /dev/null +++ b/arch/arm/mach-s5pc100/setup-sdhci.c @@ -0,0 +1,65 @@ +/* linux/arch/arm/mach-s5pc100/setup-sdhci.c + * + * Copyright 2008 Samsung Electronics + * + * S5PC100 - Helper functions for settign up SDHCI device(s) (HSMMC) + * + * Based on mach-s3c6410/setup-sdhci.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include +#include +#include +#include +#include + +#include +#include + +#include +#include + +/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */ + +char *s5pc100_hsmmc_clksrcs[4] = { + [0] = "hsmmc", + [1] = "hsmmc", + /* [2] = "mmc_bus", not yet succesfuuly used yet */ + /* [3] = "48m", - note not succesfully used yet */ +}; + + +void s5pc100_setup_sdhci0_cfg_card(struct platform_device *dev, + void __iomem *r, + struct mmc_ios *ios, + struct mmc_card *card) +{ + u32 ctrl2, ctrl3; + + /* don't need to alter anything acording to card-type */ + + writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4); + + ctrl2 = readl(r + S3C_SDHCI_CONTROL2); + ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; + ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | + S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | + S3C_SDHCI_CTRL2_ENFBCLKRX | + S3C_SDHCI_CTRL2_DFCNT_NONE | + S3C_SDHCI_CTRL2_ENCLKOUTHOLD); + + if (ios->clock < 25 * 1000000) + ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 | + S3C_SDHCI_CTRL3_FCSEL2 | + S3C_SDHCI_CTRL3_FCSEL1 | + S3C_SDHCI_CTRL3_FCSEL0); + else + ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); + + writel(ctrl2, r + S3C_SDHCI_CONTROL2); + writel(ctrl3, r + S3C_SDHCI_CONTROL3); +} -- cgit v1.2.1