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| author | Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com> | 2010-12-17 14:42:09 +0900 |
|---|---|---|
| committer | Kukjin Kim <kgene.kim@samsung.com> | 2011-01-06 14:09:18 +0900 |
| commit | c29cfa6d3e3edbbf4688a9b95a5b193d4f1c2575 (patch) | |
| tree | 8f9a2fc32f7c1a29d29413f71dd84336d45d4eca /arch/arm/mach-s3c2416/setup-sdhci.c | |
| parent | 95d6791b4f8aad51caea657236234f21b50a4559 (diff) | |
| download | kernel_samsung_smdk4412-c29cfa6d3e3edbbf4688a9b95a5b193d4f1c2575.zip kernel_samsung_smdk4412-c29cfa6d3e3edbbf4688a9b95a5b193d4f1c2575.tar.gz kernel_samsung_smdk4412-c29cfa6d3e3edbbf4688a9b95a5b193d4f1c2575.tar.bz2 | |
ARM: S3C2416: Add platform helpers for setup SDHCI
Samsung S3C2416 has two SDHCI controllers compatible with other
Samsung's SoCs (S3C64XX, S5PC100 etc...).
Add required platform setup code that the devices can be used with
sdhci-s3c driver.
Signed-off-by: Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
[kgene.kim@samsung.com: change to __raw_{readl,writel} from {readl,writel}]
[kgene.kim@samsung.com: build error fixes]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'arch/arm/mach-s3c2416/setup-sdhci.c')
| -rw-r--r-- | arch/arm/mach-s3c2416/setup-sdhci.c | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c2416/setup-sdhci.c b/arch/arm/mach-s3c2416/setup-sdhci.c new file mode 100644 index 0000000..ed34fad --- /dev/null +++ b/arch/arm/mach-s3c2416/setup-sdhci.c @@ -0,0 +1,61 @@ +/* linux/arch/arm/mach-s3c2416/setup-sdhci.c + * + * Copyright 2010 Promwad Innovation Company + * Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com> + * + * S3C2416 - Helper functions for settign up SDHCI device(s) (HSMMC) + * + * Based on mach-s3c64xx/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 <linux/kernel.h> +#include <linux/types.h> +#include <linux/interrupt.h> +#include <linux/platform_device.h> +#include <linux/io.h> + +#include <linux/mmc/card.h> +#include <linux/mmc/host.h> + +#include <plat/regs-sdhci.h> +#include <plat/sdhci.h> + +/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */ + +char *s3c2416_hsmmc_clksrcs[4] = { + [0] = "hsmmc", + [1] = "hsmmc", + [2] = "hsmmc-if", + /* [3] = "48m", - note not successfully used yet */ +}; + +void s3c2416_setup_sdhci_cfg_card(struct platform_device *dev, + void __iomem *r, + struct mmc_ios *ios, + struct mmc_card *card) +{ + u32 ctrl2, ctrl3; + + ctrl2 = __raw_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); + + __raw_writel(ctrl2, r + S3C_SDHCI_CONTROL2); + __raw_writel(ctrl3, r + S3C_SDHCI_CONTROL3); +} |