1/* linux/arch/arm/mach-s5pc100/setup-sdhci.c 2 * 3 * Copyright 2008 Samsung Electronics 4 * 5 * S5PC100 - Helper functions for settign up SDHCI device(s) (HSMMC) 6 * 7 * Based on mach-s3c6410/setup-sdhci.c 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12*/ 13 14#include <linux/kernel.h> 15#include <linux/types.h> 16#include <linux/interrupt.h> 17#include <linux/platform_device.h> 18#include <linux/io.h> 19 20#include <linux/mmc/card.h> 21#include <linux/mmc/host.h> 22 23#include <plat/regs-sdhci.h> 24#include <plat/sdhci.h> 25 26/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */ 27 28char *s5pc100_hsmmc_clksrcs[4] = { 29 [0] = "hsmmc", /* HCLK */ 30 /* [1] = "hsmmc", - duplicate HCLK entry */ 31 [2] = "sclk_mmc", /* mmc_bus */ 32 /* [3] = "48m", - note not successfully used yet */ 33}; 34 35 36void s5pc100_setup_sdhci0_cfg_card(struct platform_device *dev, 37 void __iomem *r, 38 struct mmc_ios *ios, 39 struct mmc_card *card) 40{ 41 u32 ctrl2, ctrl3; 42 43 /* don't need to alter anything acording to card-type */ 44 45 writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4); 46 47 ctrl2 = readl(r + S3C_SDHCI_CONTROL2); 48 ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK; 49 ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR | 50 S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK | 51 S3C_SDHCI_CTRL2_ENFBCLKRX | 52 S3C_SDHCI_CTRL2_DFCNT_NONE | 53 S3C_SDHCI_CTRL2_ENCLKOUTHOLD); 54 55 if (ios->clock < 25 * 1000000) 56 ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 | 57 S3C_SDHCI_CTRL3_FCSEL2 | 58 S3C_SDHCI_CTRL3_FCSEL1 | 59 S3C_SDHCI_CTRL3_FCSEL0); 60 else 61 ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0); 62 63 writel(ctrl2, r + S3C_SDHCI_CONTROL2); 64 writel(ctrl3, r + S3C_SDHCI_CONTROL3); 65} 66