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, dev->name, host->bus_width,
  44                               caps, CONFIG_ZYNQ_SDHCI_MAX_FREQ,
  45                               CONFIG_ZYNQ_SDHCI_MIN_FREQ, host->version,
  46                               host->quirks, 0);
  47         host->mmc = &plat->mmc;
  48         if (ret)
  49                 return ret;
  50         host->mmc->priv = host;
  51         host->mmc->dev = dev;
  52         upriv->mmc = host->mmc;
  53
  54         return sdhci_probe(dev);
  55 }
  56
  57 static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
  58 {
  59         struct sdhci_host *host = dev_get_priv(dev);
  60
  61         host->name = dev->name;
  62         host->ioaddr = (void *)dev_get_addr(dev);
  63
  64         return 0;
  65 }
  66
  67 static int arasan_sdhci_bind(struct udevice *dev)
  68 {
  69         struct arasan_sdhci_plat *plat = dev_get_platdata(dev);
  70         int ret;
  71
  72         ret = sdhci_bind(dev, &plat->mmc, &plat->cfg);
  73         if (ret)
  74                 return ret;
  75
  76         return 0;
  77 }
  78
  79 static const struct udevice_id arasan_sdhci_ids[] = {
  80         { .compatible = "arasan,sdhci-8.9a" },
  81         { }
  82 };
  83
  84 U_BOOT_DRIVER(arasan_sdhci_drv) = {
  85         .name           = "arasan_sdhci",
  86         .id             = UCLASS_MMC,
  87         .of_match       = arasan_sdhci_ids,
  88         .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
  89         .ops            = &sdhci_ops,
  90         .bind           = arasan_sdhci_bind,
  91         .probe          = arasan_sdhci_probe,
  92         .priv_auto_alloc_size = sizeof(struct sdhci_host),
  93         .platdata_auto_alloc_size = sizeof(struct arasan_sdhci_plat),
  94 };