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 <clk.h>
   9 #include <dm.h>
  10 #include <malloc.h>
  11 #include <sdhci.h>
  12
  13 #define F_SDH30_ESD_CONTROL             0x124
  14 #define F_SDH30_CMD_DAT_DELAY           BIT(9)
  15
  16 #define F_SDH30_TEST                    0x158
  17 #define F_SDH30_FORCE_CARD_INSERT       BIT(6)
  18
  19 struct f_sdh30_data {
  20         void (*init)(struct udevice *dev);
  21         u32 quirks;
  22 };
  23
  24 struct f_sdh30_plat {
  25         struct mmc_config cfg;
  26         struct mmc mmc;
  27
  28         bool enable_cmd_dat_delay;
  29         const struct f_sdh30_data *data;
  30 };
  31
  32 DECLARE_GLOBAL_DATA_PTR;
  33
  34 static void f_sdh30_e51_init(struct udevice *dev)
  35 {
  36         struct f_sdh30_plat *plat = dev_get_plat(dev);
  37         struct sdhci_host *host = dev_get_priv(dev);
  38         u32 val;
  39
  40         val = sdhci_readl(host, F_SDH30_ESD_CONTROL);
  41         if (plat->enable_cmd_dat_delay)
  42                 val |= F_SDH30_CMD_DAT_DELAY;
  43         else
  44                 val &= ~F_SDH30_CMD_DAT_DELAY;
  45         sdhci_writel(host, val, F_SDH30_ESD_CONTROL);
  46
  47         val = sdhci_readl(host, F_SDH30_TEST);
  48         if (plat->cfg.host_caps & MMC_CAP_NONREMOVABLE)
  49                 val |= F_SDH30_FORCE_CARD_INSERT;
  50         else
  51                 val &= ~F_SDH30_FORCE_CARD_INSERT;
  52         sdhci_writel(host, val, F_SDH30_TEST);
  53 }
  54
  55 static int f_sdh30_sdhci_probe(struct udevice *dev)
  56 {
  57         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  58         struct f_sdh30_plat *plat = dev_get_plat(dev);
  59         struct sdhci_host *host = dev_get_priv(dev);
  60         int ret;
  61
  62         plat->data = (const struct f_sdh30_data *)dev_get_driver_data(dev);
  63
  64         ret = mmc_of_parse(dev, &plat->cfg);
  65         if (ret)
  66                 return ret;
  67
  68         host->mmc = &plat->mmc;
  69         host->mmc->dev = dev;
  70         host->mmc->priv = host;
  71
  72         if (plat->data && plat->data->quirks)
  73                 host->quirks = plat->data->quirks;
  74
  75         ret = sdhci_setup_cfg(&plat->cfg, host, 200000000, 400000);
  76         if (ret)
  77                 return ret;
  78
  79         upriv->mmc = host->mmc;
  80
  81         mmc_set_clock(host->mmc, host->mmc->cfg->f_min, MMC_CLK_ENABLE);
  82
  83         ret = sdhci_probe(dev);
  84         if (ret)
  85                 return ret;
  86
  87         if (plat->data && plat->data->init)
  88                 plat->data->init(dev);
  89
  90         return 0;
  91 }
  92
  93 static int f_sdh30_of_to_plat(struct udevice *dev)
  94 {
  95         struct sdhci_host *host = dev_get_priv(dev);
  96         struct f_sdh30_plat *plat = dev_get_plat(dev);
  97
  98         host->name = strdup(dev->name);
  99         host->ioaddr = dev_read_addr_ptr(dev);
 100         host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
 101         host->index = dev_read_u32_default(dev, "index", 0);
 102
 103         plat->enable_cmd_dat_delay =
 104                 dev_read_bool(dev, "socionext,enable-cmd-dat-delay");
 105
 106         return 0;
 107 }
 108
 109 static int f_sdh30_bind(struct udevice *dev)
 110 {
 111         struct f_sdh30_plat *plat = dev_get_plat(dev);
 112
 113         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
 114 }
 115
 116 static const struct f_sdh30_data f_sdh30_e51_data = {
 117         .init = f_sdh30_e51_init,
 118         .quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_SUPPORT_SINGLE,
 119 };
 120
 121 static const struct udevice_id f_sdh30_mmc_ids[] = {
 122         {
 123                 .compatible = "fujitsu,mb86s70-sdhci-3.0",
 124         },
 125         {
 126                 .compatible = "socionext,f-sdh30-e51-mmc",
 127                 .data = (ulong)&f_sdh30_e51_data,
 128         },
 129         { }
 130 };
 131
 132 U_BOOT_DRIVER(f_sdh30_drv) = {
 133         .name           = "f_sdh30_sdhci",
 134         .id             = UCLASS_MMC,
 135         .of_match       = f_sdh30_mmc_ids,
 136         .of_to_plat     = f_sdh30_of_to_plat,
 137         .ops            = &sdhci_ops,
 138         .bind           = f_sdh30_bind,
 139         .probe          = f_sdh30_sdhci_probe,
 140         .priv_auto      = sizeof(struct sdhci_host),
 141         .plat_auto      = sizeof(struct f_sdh30_plat),
 142 };