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
  27 char *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
  34 void 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 }