drivers/mmc/hi6220_dw_mmc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2015 Linaro
   4  * peter.griffin <peter.griffin@linaro.org>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <dwmmc.h>
  10 #include <errno.h>
  11 #include <fdtdec.h>
  12 #include <malloc.h>
  13
  14 DECLARE_GLOBAL_DATA_PTR;
  15
  16 struct hi6220_dwmmc_plat {
  17         struct mmc_config cfg;
  18         struct mmc mmc;
  19 };
  20
  21 struct hi6220_dwmmc_priv_data {
  22         struct dwmci_host host;
  23 };
  24
  25 static int hi6220_dwmmc_ofdata_to_platdata(struct udevice *dev)
  26 {
  27         struct hi6220_dwmmc_priv_data *priv = dev_get_priv(dev);
  28         struct dwmci_host *host = &priv->host;
  29
  30         host->name = dev->name;
  31         host->ioaddr = (void *)devfdt_get_addr(dev);
  32         host->buswidth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
  33                                         "bus-width", 4);
  34
  35         /* use non-removable property for differentiating SD card and eMMC */
  36         if (dev_read_bool(dev, "non-removable"))
  37                 host->dev_index = 0;
  38         else
  39                 host->dev_index = 1;
  40
  41         host->priv = priv;
  42
  43         return 0;
  44 }
  45
  46 static int hi6220_dwmmc_probe(struct udevice *dev)
  47 {
  48         struct hi6220_dwmmc_plat *plat = dev_get_platdata(dev);
  49         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  50         struct hi6220_dwmmc_priv_data *priv = dev_get_priv(dev);
  51         struct dwmci_host *host = &priv->host;
  52
  53         /* Use default bus speed due to absence of clk driver */
  54         host->bus_hz = 50000000;
  55
  56         dwmci_setup_cfg(&plat->cfg, host, host->bus_hz, 400000);
  57         host->mmc = &plat->mmc;
  58
  59         host->mmc->priv = &priv->host;
  60         upriv->mmc = host->mmc;
  61         host->mmc->dev = dev;
  62
  63         return dwmci_probe(dev);
  64 }
  65
  66 static int hi6220_dwmmc_bind(struct udevice *dev)
  67 {
  68         struct hi6220_dwmmc_plat *plat = dev_get_platdata(dev);
  69         int ret;
  70
  71         ret = dwmci_bind(dev, &plat->mmc, &plat->cfg);
  72         if (ret)
  73                 return ret;
  74
  75         return 0;
  76 }
  77
  78 static const struct udevice_id hi6220_dwmmc_ids[] = {
  79         { .compatible = "hisilicon,hi6220-dw-mshc" },
  80         { }
  81 };
  82
  83 U_BOOT_DRIVER(hi6220_dwmmc_drv) = {
  84         .name = "hi6220_dwmmc",
  85         .id = UCLASS_MMC,
  86         .of_match = hi6220_dwmmc_ids,
  87         .ofdata_to_platdata = hi6220_dwmmc_ofdata_to_platdata,
  88         .ops = &dm_dwmci_ops,
  89         .bind = hi6220_dwmmc_bind,
  90         .probe = hi6220_dwmmc_probe,
  91         .priv_auto_alloc_size = sizeof(struct hi6220_dwmmc_priv_data),
  92         .platdata_auto_alloc_size = sizeof(struct hi6220_dwmmc_plat),
  93 };