LXR linux/arch/arm/mach-s3c2416/setup-sdhci.c

   1/* linux/arch/arm/mach-s3c2416/setup-sdhci.c
   2 *
   3 * Copyright 2010 Promwad Innovation Company
   4 *      Yauhen Kharuzhy <yauhen.kharuzhy@promwad.com>
   5 *
   6 * S3C2416 - Helper functions for settign up SDHCI device(s) (HSMMC)
   7 *
   8 * Based on mach-s3c64xx/setup-sdhci.c
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License version 2 as
  12 * published by the Free Software Foundation.
  13*/
  14
  15#include <linux/kernel.h>
  16#include <linux/types.h>
  17#include <linux/interrupt.h>
  18#include <linux/platform_device.h>
  19#include <linux/io.h>
  20
  21#include <linux/mmc/card.h>
  22#include <linux/mmc/host.h>
  23
  24#include <plat/regs-sdhci.h>
  25#include <plat/sdhci.h>
  26
  27/* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
  28
  29char *s3c2416_hsmmc_clksrcs[4] = {
  30        [0] = "hsmmc",
  31        [1] = "hsmmc",
  32        [2] = "hsmmc-if",
  33        /* [3] = "48m", - note not successfully used yet */
  34};
  35
  36void s3c2416_setup_sdhci_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        ctrl2 = __raw_readl(r + S3C_SDHCI_CONTROL2);
  44        ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
  45        ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
  46                  S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
  47                  S3C_SDHCI_CTRL2_ENFBCLKRX |
  48                  S3C_SDHCI_CTRL2_DFCNT_NONE |
  49                  S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
  50
  51        if (ios->clock < 25 * 1000000)
  52                ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 |
  53                         S3C_SDHCI_CTRL3_FCSEL2 |
  54                         S3C_SDHCI_CTRL3_FCSEL1 |
  55                         S3C_SDHCI_CTRL3_FCSEL0);
  56        else
  57                ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
  58
  59        __raw_writel(ctrl2, r + S3C_SDHCI_CONTROL2);
  60        __raw_writel(ctrl3, r + S3C_SDHCI_CONTROL3);
  61}
  62