LXR linux/arch/arm/mach-s3c6410/setup-sdhci.c

   1/* linux/arch/arm/mach-s3c6410/setup-sdhci.c
   2 *
   3 * Copyright 2008 Simtec Electronics
   4 * Copyright 2008 Simtec Electronics
   5 *      Ben Dooks <ben@simtec.co.uk>
   6 *      http://armlinux.simtec.co.uk/
   7 *
   8 * S3C6410 - Helper functions for settign up SDHCI device(s) (HSMMC)
   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 *s3c6410_hsmmc_clksrcs[4] = {
  30        [0] = "hsmmc",
  31        [1] = "hsmmc",
  32        [2] = "mmc_bus",
  33        /* [3] = "48m", - note not succesfully used yet */
  34};
  35
  36
  37void s3c6410_setup_sdhci0_cfg_card(struct platform_device *dev,
  38                                    void __iomem *r,
  39                                    struct mmc_ios *ios,
  40                                    struct mmc_card *card)
  41{
  42        u32 ctrl2, ctrl3;
  43
  44        /* don't need to alter anything acording to card-type */
  45
  46        writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4);
  47
  48        ctrl2 = readl(r + S3C_SDHCI_CONTROL2);
  49        ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
  50        ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
  51                  S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
  52                  S3C_SDHCI_CTRL2_ENFBCLKRX |
  53                  S3C_SDHCI_CTRL2_DFCNT_NONE |
  54                  S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
  55
  56        if (ios->clock < 25 * 1000000)
  57                ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 |
  58                         S3C_SDHCI_CTRL3_FCSEL2 |
  59                         S3C_SDHCI_CTRL3_FCSEL1 |
  60                         S3C_SDHCI_CTRL3_FCSEL0);
  61        else
  62                ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
  63
  64        printk(KERN_INFO "%s: CTRL 2=%08x, 3=%08x\n", __func__, ctrl2, ctrl3);
  65        writel(ctrl2, r + S3C_SDHCI_CONTROL2);
  66        writel(ctrl3, r + S3C_SDHCI_CONTROL3);
  67}
  68
  69