LXR linux/arch/arm/mach-s5pv210/setup-sdhci.c

   1/* linux/arch/arm/mach-s5pv210/setup-sdhci.c
   2 *
   3 * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
   4 *              http://www.samsung.com/
   5 *
   6 * S5PV210 - Helper functions for settign up SDHCI device(s) (HSMMC)
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11*/
  12
  13#include <linux/kernel.h>
  14#include <linux/types.h>
  15#include <linux/interrupt.h>
  16#include <linux/platform_device.h>
  17#include <linux/io.h>
  18
  19#include <linux/mmc/card.h>
  20#include <linux/mmc/host.h>
  21
  22#include <plat/regs-sdhci.h>
  23#include <plat/sdhci.h>
  24
  25/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
  26
  27char *s5pv210_hsmmc_clksrcs[4] = {
  28        [0] = "hsmmc",          /* HCLK */
  29        /* [1] = "hsmmc",       - duplicate HCLK entry */
  30        [2] = "sclk_mmc",       /* mmc_bus */
  31        /* [3] = NULL,          - reserved */
  32};
  33
  34void s5pv210_setup_sdhci_cfg_card(struct platform_device *dev,
  35                                    void __iomem *r,
  36                                    struct mmc_ios *ios,
  37                                    struct mmc_card *card)
  38{
  39        u32 ctrl2, ctrl3;
  40
  41        /* don't need to alter anything acording to card-type */
  42
  43        writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4);
  44
  45        ctrl2 = readl(r + S3C_SDHCI_CONTROL2);
  46        ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
  47        ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
  48                  S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
  49                  S3C_SDHCI_CTRL2_ENFBCLKRX |
  50                  S3C_SDHCI_CTRL2_DFCNT_NONE |
  51                  S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
  52
  53        if (ios->clock < 25 * 1000000)
  54                ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 |
  55                         S3C_SDHCI_CTRL3_FCSEL2 |
  56                         S3C_SDHCI_CTRL3_FCSEL1 |
  57                         S3C_SDHCI_CTRL3_FCSEL0);
  58        else
  59                ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
  60
  61        writel(ctrl2, r + S3C_SDHCI_CONTROL2);
  62        writel(ctrl3, r + S3C_SDHCI_CONTROL3);
  63}
  64