drivers/mmc/rockchip_sdhci.c

   1 /*
   2  * (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd
   3  *
   4  * Rockchip 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 /* 400KHz is max freq for card ID etc. Use that as min */
  17 #define EMMC_MIN_FREQ   400000
  18
  19 struct rockchip_sdhc_plat {
  20         struct mmc_config cfg;
  21         struct mmc mmc;
  22 };
  23
  24 struct rockchip_sdhc {
  25         struct sdhci_host host;
  26         void *base;
  27 };
  28
  29 static int arasan_sdhci_probe(struct udevice *dev)
  30 {
  31         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  32         struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
  33         struct rockchip_sdhc *prv = dev_get_priv(dev);
  34         struct sdhci_host *host = &prv->host;
  35         int ret;
  36
  37         host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
  38
  39         ret = sdhci_setup_cfg(&plat->cfg, host, CONFIG_ROCKCHIP_SDHCI_MAX_FREQ,
  40                         EMMC_MIN_FREQ);
  41
  42         host->mmc = &plat->mmc;
  43         if (ret)
  44                 return ret;
  45         host->mmc->priv = &prv->host;
  46         host->mmc->dev = dev;
  47         upriv->mmc = host->mmc;
  48
  49         return sdhci_probe(dev);
  50 }
  51
  52 static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
  53 {
  54         struct sdhci_host *host = dev_get_priv(dev);
  55
  56         host->name = dev->name;
  57         host->ioaddr = dev_get_addr_ptr(dev);
  58
  59         return 0;
  60 }
  61
  62 static int rockchip_sdhci_bind(struct udevice *dev)
  63 {
  64         struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
  65
  66         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
  67 }
  68
  69 static const struct udevice_id arasan_sdhci_ids[] = {
  70         { .compatible = "arasan,sdhci-5.1" },
  71         { }
  72 };
  73
  74 U_BOOT_DRIVER(arasan_sdhci_drv) = {
  75         .name           = "arasan_sdhci",
  76         .id             = UCLASS_MMC,
  77         .of_match       = arasan_sdhci_ids,
  78         .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
  79         .ops            = &sdhci_ops,
  80         .bind           = rockchip_sdhci_bind,
  81         .probe          = arasan_sdhci_probe,
  82         .priv_auto_alloc_size = sizeof(struct rockchip_sdhc),
  83         .platdata_auto_alloc_size = sizeof(struct rockchip_sdhc_plat),
  84 };