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 struct hisi_mmc_data {
  26         unsigned int clock;
  27         bool use_fifo;
  28 };
  29
  30 static int hi6220_dwmmc_ofdata_to_platdata(struct udevice *dev)
  31 {
  32         struct hi6220_dwmmc_priv_data *priv = dev_get_priv(dev);
  33         struct dwmci_host *host = &priv->host;
  34
  35         host->name = dev->name;
  36         host->ioaddr = (void *)devfdt_get_addr(dev);
  37         host->buswidth = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
  38                                         "bus-width", 4);
  39
  40         /* use non-removable property for differentiating SD card and eMMC */
  41         if (dev_read_bool(dev, "non-removable"))
  42                 host->dev_index = 0;
  43         else
  44                 host->dev_index = 1;
  45
  46         host->priv = priv;
  47
  48         return 0;
  49 }
  50
  51 static int hi6220_dwmmc_probe(struct udevice *dev)
  52 {
  53         struct hi6220_dwmmc_plat *plat = dev_get_platdata(dev);
  54         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  55         struct hi6220_dwmmc_priv_data *priv = dev_get_priv(dev);
  56         struct dwmci_host *host = &priv->host;
  57         struct hisi_mmc_data *mmc_data;
  58
  59         mmc_data = (struct hisi_mmc_data *)dev_get_driver_data(dev);
  60
  61         /* Use default bus speed due to absence of clk driver */
  62         host->bus_hz = mmc_data->clock;
  63
  64         dwmci_setup_cfg(&plat->cfg, host, host->bus_hz, 400000);
  65         host->mmc = &plat->mmc;
  66
  67         host->fifo_mode = mmc_data->use_fifo;
  68         host->mmc->priv = &priv->host;
  69         upriv->mmc = host->mmc;
  70         host->mmc->dev = dev;
  71
  72         return dwmci_probe(dev);
  73 }
  74
  75 static int hi6220_dwmmc_bind(struct udevice *dev)
  76 {
  77         struct hi6220_dwmmc_plat *plat = dev_get_platdata(dev);
  78         int ret;
  79
  80         ret = dwmci_bind(dev, &plat->mmc, &plat->cfg);
  81         if (ret)
  82                 return ret;
  83
  84         return 0;
  85 }
  86
  87 static const struct hisi_mmc_data hi3660_mmc_data = {
  88         .clock = 3200000,
  89         .use_fifo = true,
  90 };
  91
  92 static const struct hisi_mmc_data hi6220_mmc_data = {
  93         .clock = 50000000,
  94         .use_fifo = false,
  95 };
  96
  97 static const struct udevice_id hi6220_dwmmc_ids[] = {
  98         { .compatible = "hisilicon,hi6220-dw-mshc",
  99           .data = (ulong)&hi6220_mmc_data },
 100         { .compatible = "hisilicon,hi3798cv200-dw-mshc",
 101           .data = (ulong)&hi6220_mmc_data },
 102         { .compatible = "hisilicon,hi3660-dw-mshc",
 103           .data = (ulong)&hi3660_mmc_data },
 104         { }
 105 };
 106
 107 U_BOOT_DRIVER(hi6220_dwmmc_drv) = {
 108         .name = "hi6220_dwmmc",
 109         .id = UCLASS_MMC,
 110         .of_match = hi6220_dwmmc_ids,
 111         .ofdata_to_platdata = hi6220_dwmmc_ofdata_to_platdata,
 112         .ops = &dm_dwmci_ops,
 113         .bind = hi6220_dwmmc_bind,
 114         .probe = hi6220_dwmmc_probe,
 115         .priv_auto_alloc_size = sizeof(struct hi6220_dwmmc_priv_data),
 116         .platdata_auto_alloc_size = sizeof(struct hi6220_dwmmc_plat),
 117 };