drivers/mmc/zynq_sdhci.c

   1 /*
   2  * (C) Copyright 2013 - 2015 Xilinx, Inc.
   3  *
   4  * Xilinx Zynq SD Host Controller Interface
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <dm.h>
  11 #include <fdtdec.h>
  12 #include <libfdt.h>
  13 #include <malloc.h>
  14 #include <sdhci.h>
  15
  16 #ifndef CONFIG_ZYNQ_SDHCI_MIN_FREQ
  17 # define CONFIG_ZYNQ_SDHCI_MIN_FREQ     0
  18 #endif
  19
  20 struct arasan_sdhci_plat {
  21         struct mmc_config cfg;
  22         struct mmc mmc;
  23 };
  24
  25 static int arasan_sdhci_probe(struct udevice *dev)
  26 {
  27         struct arasan_sdhci_plat *plat = dev_get_platdata(dev);
  28         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  29         struct sdhci_host *host = dev_get_priv(dev);
  30         u32 caps;
  31         int ret;
  32
  33         host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
  34                        SDHCI_QUIRK_BROKEN_R1B;
  35
  36 #ifdef CONFIG_ZYNQ_HISPD_BROKEN
  37         host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT;
  38 #endif
  39
  40         host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
  41
  42         caps = sdhci_readl(host, SDHCI_CAPABILITIES);
  43         ret = sdhci_setup_cfg(&plat->cfg, host, CONFIG_ZYNQ_SDHCI_MAX_FREQ,
  44                               CONFIG_ZYNQ_SDHCI_MIN_FREQ);
  45         host->mmc = &plat->mmc;
  46         if (ret)
  47                 return ret;
  48         host->mmc->priv = host;
  49         host->mmc->dev = dev;
  50         upriv->mmc = host->mmc;
  51
  52         return sdhci_probe(dev);
  53 }
  54
  55 static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
  56 {
  57         struct sdhci_host *host = dev_get_priv(dev);
  58
  59         host->name = dev->name;
  60         host->ioaddr = (void *)dev_get_addr(dev);
  61
  62         return 0;
  63 }
  64
  65 static int arasan_sdhci_bind(struct udevice *dev)
  66 {
  67         struct arasan_sdhci_plat *plat = dev_get_platdata(dev);
  68         int ret;
  69
  70         ret = sdhci_bind(dev, &plat->mmc, &plat->cfg);
  71         if (ret)
  72                 return ret;
  73
  74         return 0;
  75 }
  76
  77 static const struct udevice_id arasan_sdhci_ids[] = {
  78         { .compatible = "arasan,sdhci-8.9a" },
  79         { }
  80 };
  81
  82 U_BOOT_DRIVER(arasan_sdhci_drv) = {
  83         .name           = "arasan_sdhci",
  84         .id             = UCLASS_MMC,
  85         .of_match       = arasan_sdhci_ids,
  86         .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
  87         .ops            = &sdhci_ops,
  88         .bind           = arasan_sdhci_bind,
  89         .probe          = arasan_sdhci_probe,
  90         .priv_auto_alloc_size = sizeof(struct sdhci_host),
  91         .platdata_auto_alloc_size = sizeof(struct arasan_sdhci_plat),
  92 };