drivers/mmc/f_sdh30.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Socionext F_SDH30 eMMC driver
   4  * Copyright 2021 Linaro Ltd.
   5  * Copyright 2021 Socionext, Inc.
   6  */
   7
   8 #include <common.h>
   9 #include <clk.h>
  10 #include <dm.h>
  11 #include <malloc.h>
  12 #include <sdhci.h>
  13
  14 struct f_sdh30_plat {
  15         struct mmc_config cfg;
  16         struct mmc mmc;
  17 };
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 static int f_sdh30_sdhci_probe(struct udevice *dev)
  22 {
  23         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  24         struct f_sdh30_plat *plat = dev_get_plat(dev);
  25         struct sdhci_host *host = dev_get_priv(dev);
  26         int ret;
  27
  28         ret = mmc_of_parse(dev, &plat->cfg);
  29         if (ret)
  30                 return ret;
  31
  32         host->mmc = &plat->mmc;
  33         host->mmc->dev = dev;
  34         host->mmc->priv = host;
  35
  36         ret = sdhci_setup_cfg(&plat->cfg, host, 200000000, 400000);
  37         if (ret)
  38                 return ret;
  39
  40         upriv->mmc = host->mmc;
  41
  42         mmc_set_clock(host->mmc, host->mmc->cfg->f_min, MMC_CLK_ENABLE);
  43
  44         return sdhci_probe(dev);
  45 }
  46
  47 static int f_sdh30_of_to_plat(struct udevice *dev)
  48 {
  49         struct sdhci_host *host = dev_get_priv(dev);
  50
  51         host->name = strdup(dev->name);
  52         host->ioaddr = dev_read_addr_ptr(dev);
  53         host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
  54         host->index = dev_read_u32_default(dev, "index", 0);
  55
  56         return 0;
  57 }
  58
  59 static int f_sdh30_bind(struct udevice *dev)
  60 {
  61         struct f_sdh30_plat *plat = dev_get_plat(dev);
  62
  63         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
  64 }
  65
  66 static const struct udevice_id f_sdh30_mmc_ids[] = {
  67         { .compatible = "fujitsu,mb86s70-sdhci-3.0" },
  68         { }
  69 };
  70
  71 U_BOOT_DRIVER(f_sdh30_drv) = {
  72         .name           = "f_sdh30_sdhci",
  73         .id             = UCLASS_MMC,
  74         .of_match       = f_sdh30_mmc_ids,
  75         .of_to_plat     = f_sdh30_of_to_plat,
  76         .ops            = &sdhci_ops,
  77         .bind           = f_sdh30_bind,
  78         .probe          = f_sdh30_sdhci_probe,
  79         .priv_auto      = sizeof(struct sdhci_host),
  80         .plat_auto      = sizeof(struct f_sdh30_plat),
  81 };