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 static int arasan_sdhci_probe(struct udevice *dev)
  21 {
  22         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  23         struct sdhci_host *host = dev_get_priv(dev);
  24
  25         host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
  26                        SDHCI_QUIRK_BROKEN_R1B;
  27
  28 #ifdef CONFIG_ZYNQ_HISPD_BROKEN
  29         host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT;
  30 #endif
  31
  32         host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
  33
  34         add_sdhci(host, CONFIG_ZYNQ_SDHCI_MAX_FREQ,
  35                   CONFIG_ZYNQ_SDHCI_MIN_FREQ);
  36
  37         upriv->mmc = host->mmc;
  38         host->mmc->dev = dev;
  39
  40         return 0;
  41 }
  42
  43 static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
  44 {
  45         struct sdhci_host *host = dev_get_priv(dev);
  46
  47         host->name = dev->name;
  48         host->ioaddr = (void *)dev_get_addr(dev);
  49
  50         return 0;
  51 }
  52
  53 static const struct udevice_id arasan_sdhci_ids[] = {
  54         { .compatible = "arasan,sdhci-8.9a" },
  55         { }
  56 };
  57
  58 U_BOOT_DRIVER(arasan_sdhci_drv) = {
  59         .name           = "arasan_sdhci",
  60         .id             = UCLASS_MMC,
  61         .of_match       = arasan_sdhci_ids,
  62         .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
  63         .probe          = arasan_sdhci_probe,
  64         .priv_auto_alloc_size = sizeof(struct sdhci_host),
  65 };