drivers/mmc/rockchip_sdhci.c

   1 /*
   2  * (C) Copyright 2016 Fuzhou Rockchip Electronics Co., Ltd
   3  *
   4  * Rockchip SD Host Controller Interface
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <dm.h>
  11 #include <dt-structs.h>
  12 #include <fdtdec.h>
  13 #include <libfdt.h>
  14 #include <malloc.h>
  15 #include <mapmem.h>
  16 #include <sdhci.h>
  17 #include <clk.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20 /* 400KHz is max freq for card ID etc. Use that as min */
  21 #define EMMC_MIN_FREQ   400000
  22
  23 struct rockchip_sdhc_plat {
  24 #if CONFIG_IS_ENABLED(OF_PLATDATA)
  25         struct dtd_rockchip_rk3399_sdhci_5_1 dtplat;
  26 #endif
  27         struct mmc_config cfg;
  28         struct mmc mmc;
  29 };
  30
  31 struct rockchip_sdhc {
  32         struct sdhci_host host;
  33         void *base;
  34 };
  35
  36 static int arasan_sdhci_probe(struct udevice *dev)
  37 {
  38         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
  39         struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
  40         struct rockchip_sdhc *prv = dev_get_priv(dev);
  41         struct sdhci_host *host = &prv->host;
  42         int max_frequency, ret;
  43         struct clk clk;
  44
  45 #if CONFIG_IS_ENABLED(OF_PLATDATA)
  46         struct dtd_rockchip_rk3399_sdhci_5_1 *dtplat = &plat->dtplat;
  47
  48         host->name = dev->name;
  49         host->ioaddr = map_sysmem(dtplat->reg[1], dtplat->reg[3]);
  50         max_frequency = dtplat->max_frequency;
  51         ret = clk_get_by_index_platdata(dev, 0, dtplat->clocks, &clk);
  52 #else
  53         max_frequency = dev_read_u32_default(dev, "max-frequency", 0);
  54         ret = clk_get_by_index(dev, 0, &clk);
  55 #endif
  56         if (!ret) {
  57                 ret = clk_set_rate(&clk, max_frequency);
  58                 if (IS_ERR_VALUE(ret))
  59                         printf("%s clk set rate fail!\n", __func__);
  60         } else {
  61                 printf("%s fail to get clk\n", __func__);
  62         }
  63
  64         host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
  65         host->max_clk = max_frequency;
  66
  67         ret = sdhci_setup_cfg(&plat->cfg, host, 0, EMMC_MIN_FREQ);
  68
  69         host->mmc = &plat->mmc;
  70         if (ret)
  71                 return ret;
  72         host->mmc->priv = &prv->host;
  73         host->mmc->dev = dev;
  74         upriv->mmc = host->mmc;
  75
  76         return sdhci_probe(dev);
  77 }
  78
  79 static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev)
  80 {
  81 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
  82         struct sdhci_host *host = dev_get_priv(dev);
  83
  84         host->name = dev->name;
  85         host->ioaddr = devfdt_get_addr_ptr(dev);
  86 #endif
  87
  88         return 0;
  89 }
  90
  91 static int rockchip_sdhci_bind(struct udevice *dev)
  92 {
  93         struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
  94
  95         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
  96 }
  97
  98 static const struct udevice_id arasan_sdhci_ids[] = {
  99         { .compatible = "arasan,sdhci-5.1" },
 100         { }
 101 };
 102
 103 U_BOOT_DRIVER(arasan_sdhci_drv) = {
 104         .name           = "rockchip_rk3399_sdhci_5_1",
 105         .id             = UCLASS_MMC,
 106         .of_match       = arasan_sdhci_ids,
 107         .ofdata_to_platdata = arasan_sdhci_ofdata_to_platdata,
 108         .ops            = &sdhci_ops,
 109         .bind           = rockchip_sdhci_bind,
 110         .probe          = arasan_sdhci_probe,
 111         .priv_auto_alloc_size = sizeof(struct rockchip_sdhc),
 112         .platdata_auto_alloc_size = sizeof(struct rockchip_sdhc_plat),
 113 };