arch/arm/mach-u300/mmc.c

   1 /*
   2  *
   3  * arch/arm/mach-u300/mmc.c
   4  *
   5  *
   6  * Copyright (C) 2009 ST-Ericsson AB
   7  * License terms: GNU General Public License (GPL) version 2
   8  *
   9  * Author: Linus Walleij <linus.walleij@stericsson.com>
  10  * Author: Johan Lundin <johan.lundin@stericsson.com>
  11  * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
  12  */
  13 #include <linux/device.h>
  14 #include <linux/amba/bus.h>
  15 #include <linux/mmc/host.h>
  16 #include <linux/gpio.h>
  17 #include <linux/amba/mmci.h>
  18 #include <linux/slab.h>
  19
  20 #include "mmc.h"
  21 #include "padmux.h"
  22
  23 static struct mmci_platform_data mmc0_plat_data = {
  24         /*
  25          * Do not set ocr_mask or voltage translation function,
  26          * we have a regulator we can control instead.
  27          */
  28         /* Nominally 2.85V on our platform */
  29         .f_max = 24000000,
  30         .gpio_wp = -1,
  31         .gpio_cd = U300_GPIO_PIN_MMC_CD,
  32         .cd_invert = true,
  33         .capabilities = MMC_CAP_MMC_HIGHSPEED |
  34         MMC_CAP_SD_HIGHSPEED | MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA,
  35 };
  36
  37 int __devinit mmc_init(struct amba_device *adev)
  38 {
  39         struct device *mmcsd_device = &adev->dev;
  40         struct pmx *pmx;
  41         int ret = 0;
  42
  43         mmcsd_device->platform_data = &mmc0_plat_data;
  44
  45         /*
  46          * Setup padmuxing for MMC. Since this must always be
  47          * compiled into the kernel, pmx is never released.
  48          */
  49         pmx = pmx_get(mmcsd_device, U300_APP_PMX_MMC_SETTING);
  50
  51         if (IS_ERR(pmx))
  52                 pr_warning("Could not get padmux handle\n");
  53         else {
  54                 ret = pmx_activate(mmcsd_device, pmx);
  55                 if (IS_ERR_VALUE(ret))
  56                         pr_warning("Could not activate padmuxing\n");
  57         }
  58
  59         return ret;
  60 }