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 #define F_SDH30_ESD_CONTROL             0x124
  15 #define F_SDH30_CMD_DAT_DELAY           BIT(9)
  16
  17 #define F_SDH30_TEST                    0x158
  18 #define F_SDH30_FORCE_CARD_INSERT       BIT(6)
  19
  20 struct f_sdh30_data {
  21         void (*init)(struct udevice *dev);
  22         u32 quirks;
  23 };
  24
  25 struct f_sdh30_plat {
  26         struct mmc_config cfg;
  27         struct mmc mmc;
  28
  29         bool enable_cmd_dat_delay;
  30         const struct f_sdh30_data *data;
  31 };
  32
  33 DECLARE_GLOBAL_DATA_PTR;
  34
  35 static void f_sdh30_e51_init(struct udevice *dev)
  36 {
  37         struct f_sdh30_plat *plat = dev_get_plat(dev);
  38         struct sdhci_host *host = dev_get_priv(dev);
  39         u32 val;
  40
  41         val = sdhci_readl(host, F_SDH30_ESD_CONTROL);
  42         if (plat->enable_cmd_dat_delay)
  43                 val |= F_SDH30_CMD_DAT_DELAY;
  44         else
  45                 val &= ~F_SDH30_CMD_DAT_DELAY;
  46         sdhci_writel(host, val, F_SDH30_ESD_CONTROL);
  47
  48         val = sdhci_readl(host, F_SDH30_TEST);
  49         if (plat->cfg.host_caps & MMC_CAP_NONREMOVABLE)
  50                 val |= F_SDH30_FORCE_CARD_INSERT;
  51         else
  52                 val &= ~F_SDH30_FORCE_CARD_INSERT;
  53         sdhci_writel(host, val, F_SDH30_TEST);
  54 }
  55
  56 static int f_sdh30_sdhci_probe(struct udevice *dev)
  57 {
  58         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  59         struct f_sdh30_plat *plat = dev_get_plat(dev);
  60         struct sdhci_host *host = dev_get_priv(dev);
  61         int ret;
  62
  63         plat->data = (const struct f_sdh30_data *)dev_get_driver_data(dev);
  64
  65         ret = mmc_of_parse(dev, &plat->cfg);
  66         if (ret)
  67                 return ret;
  68
  69         host->mmc = &plat->mmc;
  70         host->mmc->dev = dev;
  71         host->mmc->priv = host;
  72
  73         if (plat->data && plat->data->quirks)
  74                 host->quirks = plat->data->quirks;
  75
  76         ret = sdhci_setup_cfg(&plat->cfg, host, 200000000, 400000);
  77         if (ret)
  78                 return ret;
  79
  80         upriv->mmc = host->mmc;
  81
  82         mmc_set_clock(host->mmc, host->mmc->cfg->f_min, MMC_CLK_ENABLE);
  83
  84         ret = sdhci_probe(dev);
  85         if (ret)
  86                 return ret;
  87
  88         if (plat->data && plat->data->init)
  89                 plat->data->init(dev);
  90
  91         return 0;
  92 }
  93
  94 static int f_sdh30_of_to_plat(struct udevice *dev)
  95 {
  96         struct sdhci_host *host = dev_get_priv(dev);
  97         struct f_sdh30_plat *plat = dev_get_plat(dev);
  98
  99         host->name = strdup(dev->name);
 100         host->ioaddr = dev_read_addr_ptr(dev);
 101         host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
 102         host->index = dev_read_u32_default(dev, "index", 0);
 103
 104         plat->enable_cmd_dat_delay =
 105                 dev_read_bool(dev, "socionext,enable-cmd-dat-delay");
 106
 107         return 0;
 108 }
 109
 110 static int f_sdh30_bind(struct udevice *dev)
 111 {
 112         struct f_sdh30_plat *plat = dev_get_plat(dev);
 113
 114         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
 115 }
 116
 117 static const struct f_sdh30_data f_sdh30_e51_data = {
 118         .init = f_sdh30_e51_init,
 119         .quirks = SDHCI_QUIRK_WAIT_SEND_CMD | SDHCI_QUIRK_SUPPORT_SINGLE,
 120 };
 121
 122 static const struct udevice_id f_sdh30_mmc_ids[] = {
 123         {
 124                 .compatible = "fujitsu,mb86s70-sdhci-3.0",
 125         },
 126         {
 127                 .compatible = "socionext,f-sdh30-e51-mmc",
 128                 .data = (ulong)&f_sdh30_e51_data,
 129         },
 130         { }
 131 };
 132
 133 U_BOOT_DRIVER(f_sdh30_drv) = {
 134         .name           = "f_sdh30_sdhci",
 135         .id             = UCLASS_MMC,
 136         .of_match       = f_sdh30_mmc_ids,
 137         .of_to_plat     = f_sdh30_of_to_plat,
 138         .ops            = &sdhci_ops,
 139         .bind           = f_sdh30_bind,
 140         .probe          = f_sdh30_sdhci_probe,
 141         .priv_auto      = sizeof(struct sdhci_host),
 142         .plat_auto      = sizeof(struct f_sdh30_plat),
 143 };