drivers/mmc/tangier_sdhci.c

   1 /*
   2  * Copyright (c) 2017 Intel Corporation
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <dm/device.h>
   9 #include <linux/io.h>
  10 #include <linux/sizes.h>
  11 #include <malloc.h>
  12 #include <mmc.h>
  13 #include <sdhci.h>
  14
  15 #define SDHCI_TANGIER_FMAX      200000000
  16 #define SDHCI_TANGIER_FMIN      400000
  17
  18 struct sdhci_tangier_plat {
  19         struct mmc_config cfg;
  20         struct mmc mmc;
  21         void __iomem *ioaddr;
  22 };
  23
  24 static int sdhci_tangier_bind(struct udevice *dev)
  25 {
  26         struct sdhci_tangier_plat *plat = dev_get_platdata(dev);
  27
  28         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
  29 }
  30
  31 static int sdhci_tangier_probe(struct udevice *dev)
  32 {
  33         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  34         struct sdhci_tangier_plat *plat = dev_get_platdata(dev);
  35         struct sdhci_host *host = dev_get_priv(dev);
  36         fdt_addr_t base;
  37         int ret;
  38
  39         base = devfdt_get_addr(dev);
  40         if (base == FDT_ADDR_T_NONE)
  41                 return -EINVAL;
  42
  43         plat->ioaddr = devm_ioremap(dev, base, SZ_1K);
  44         if (!plat->ioaddr)
  45                 return -ENOMEM;
  46
  47         host->name = dev->name;
  48         host->ioaddr = plat->ioaddr;
  49         host->quirks = SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE |
  50                        SDHCI_QUIRK_32BIT_DMA_ADDR | SDHCI_QUIRK_WAIT_SEND_CMD;
  51
  52         /* MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195 */
  53         host->voltages = MMC_VDD_165_195;
  54
  55         ret = sdhci_setup_cfg(&plat->cfg, host, SDHCI_TANGIER_FMAX,
  56                         SDHCI_TANGIER_FMIN);
  57         if (ret)
  58                 return ret;
  59
  60         upriv->mmc = &plat->mmc;
  61         host->mmc = &plat->mmc;
  62         host->mmc->priv = host;
  63
  64         return sdhci_probe(dev);
  65 }
  66
  67 static const struct udevice_id sdhci_tangier_match[] = {
  68         { .compatible = "intel,sdhci-tangier" },
  69         { /* sentinel */ }
  70 };
  71
  72 U_BOOT_DRIVER(sdhci_tangier) = {
  73         .name           = "sdhci-tangier",
  74         .id             = UCLASS_MMC,
  75         .of_match       = sdhci_tangier_match,
  76         .bind           = sdhci_tangier_bind,
  77         .probe          = sdhci_tangier_probe,
  78         .ops            = &sdhci_ops,
  79         .priv_auto_alloc_size = sizeof(struct sdhci_host),
  80         .platdata_auto_alloc_size = sizeof(struct sdhci_tangier_plat),
  81 };