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 <mach/gpio.h>
  25 #include <plat/gpio-cfg.h>
  26 #include <plat/regs-sdhci.h>
  27 #include <plat/sdhci.h>
  28
  29 /* clock sources for the mmc bus clock, order as for the ctrl2[5..4] */
  30
  31 char *s3c6410_hsmmc_clksrcs[4] = {
  32         [0] = "hsmmc",
  33         [1] = "hsmmc",
  34         [2] = "mmc_bus",
  35         /* [3] = "48m", - note not succesfully used yet */
  36 };
  37
  38 void s3c6410_setup_sdhci0_cfg_gpio(struct platform_device *dev, int width)
  39 {
  40         unsigned int gpio;
  41         unsigned int end;
  42
  43         end = S3C64XX_GPG(2 + width);
  44
  45         /* Set all the necessary GPG pins to special-function 0 */
  46         for (gpio = S3C64XX_GPG(0); gpio < end; gpio++) {
  47                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  48                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  49         }
  50
  51         s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
  52         s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(2));
  53 }
  54
  55 void s3c6410_setup_sdhci0_cfg_card(struct platform_device *dev,
  56                                     void __iomem *r,
  57                                     struct mmc_ios *ios,
  58                                     struct mmc_card *card)
  59 {
  60         u32 ctrl2, ctrl3;
  61
  62         /* don't need to alter anything acording to card-type */
  63
  64         writel(S3C64XX_SDHCI_CONTROL4_DRIVE_9mA, r + S3C64XX_SDHCI_CONTROL4);
  65
  66         ctrl2 = readl(r + S3C_SDHCI_CONTROL2);
  67         ctrl2 &= S3C_SDHCI_CTRL2_SELBASECLK_MASK;
  68         ctrl2 |= (S3C64XX_SDHCI_CTRL2_ENSTAASYNCCLR |
  69                   S3C64XX_SDHCI_CTRL2_ENCMDCNFMSK |
  70                   S3C_SDHCI_CTRL2_ENFBCLKRX |
  71                   S3C_SDHCI_CTRL2_DFCNT_NONE |
  72                   S3C_SDHCI_CTRL2_ENCLKOUTHOLD);
  73
  74         if (ios->clock < 25 * 1000000)
  75                 ctrl3 = (S3C_SDHCI_CTRL3_FCSEL3 |
  76                          S3C_SDHCI_CTRL3_FCSEL2 |
  77                          S3C_SDHCI_CTRL3_FCSEL1 |
  78                          S3C_SDHCI_CTRL3_FCSEL0);
  79         else
  80                 ctrl3 = (S3C_SDHCI_CTRL3_FCSEL1 | S3C_SDHCI_CTRL3_FCSEL0);
  81
  82         printk(KERN_INFO "%s: CTRL 2=%08x, 3=%08x\n", __func__, ctrl2, ctrl3);
  83         writel(ctrl2, r + S3C_SDHCI_CONTROL2);
  84         writel(ctrl3, r + S3C_SDHCI_CONTROL3);
  85 }
  86
  87 void s3c6410_setup_sdhci1_cfg_gpio(struct platform_device *dev, int width)
  88 {
  89         unsigned int gpio;
  90         unsigned int end;
  91
  92         end = S3C64XX_GPH(2 + width);
  93
  94         /* Set all the necessary GPG pins to special-function 0 */
  95         for (gpio = S3C64XX_GPH(0); gpio < end; gpio++) {
  96                 s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2));
  97                 s3c_gpio_setpull(gpio, S3C_GPIO_PULL_NONE);
  98         }
  99
 100         s3c_gpio_setpull(S3C64XX_GPG(6), S3C_GPIO_PULL_UP);
 101         s3c_gpio_cfgpin(S3C64XX_GPG(6), S3C_GPIO_SFN(3));
 102 }