drivers/mmc/rockchip_dw_mmc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2013 Google, Inc
   4  */
   5
   6 #include <common.h>
   7 #include <clk.h>
   8 #include <dm.h>
   9 #include <dt-structs.h>
  10 #include <dwmmc.h>
  11 #include <errno.h>
  12 #include <log.h>
  13 #include <mapmem.h>
  14 #include <pwrseq.h>
  15 #include <syscon.h>
  16 #include <asm/gpio.h>
  17 #include <asm/arch-rockchip/clock.h>
  18 #include <asm/arch-rockchip/periph.h>
  19 #include <linux/delay.h>
  20 #include <linux/err.h>
  21
  22 struct rockchip_mmc_plat {
  23 #if CONFIG_IS_ENABLED(OF_PLATDATA)
  24         struct dtd_rockchip_rk3288_dw_mshc dtplat;
  25 #endif
  26         struct mmc_config cfg;
  27         struct mmc mmc;
  28 };
  29
  30 struct rockchip_dwmmc_priv {
  31         struct clk clk;
  32         struct dwmci_host host;
  33         int fifo_depth;
  34         bool fifo_mode;
  35         u32 minmax[2];
  36 };
  37
  38 static uint rockchip_dwmmc_get_mmc_clk(struct dwmci_host *host, uint freq)
  39 {
  40         struct udevice *dev = host->priv;
  41         struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
  42         int ret;
  43
  44         ret = clk_set_rate(&priv->clk, freq);
  45         if (ret < 0) {
  46                 debug("%s: err=%d\n", __func__, ret);
  47                 return ret;
  48         }
  49
  50         return freq;
  51 }
  52
  53 static int rockchip_dwmmc_of_to_plat(struct udevice *dev)
  54 {
  55         struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
  56         struct dwmci_host *host = &priv->host;
  57
  58         if (!CONFIG_IS_ENABLED(OF_REAL))
  59                 return 0;
  60
  61         host->name = dev->name;
  62         host->ioaddr = dev_read_addr_ptr(dev);
  63         host->buswidth = dev_read_u32_default(dev, "bus-width", 4);
  64         host->get_mmc_clk = rockchip_dwmmc_get_mmc_clk;
  65         host->priv = dev;
  66
  67         /* use non-removeable as sdcard and emmc as judgement */
  68         if (dev_read_bool(dev, "non-removable"))
  69                 host->dev_index = 0;
  70         else
  71                 host->dev_index = 1;
  72
  73         priv->fifo_depth = dev_read_u32_default(dev, "fifo-depth", 0);
  74
  75         if (priv->fifo_depth < 0)
  76                 return -EINVAL;
  77         priv->fifo_mode = dev_read_bool(dev, "fifo-mode");
  78
  79 #ifdef CONFIG_SPL_BUILD
  80         if (!priv->fifo_mode)
  81                 priv->fifo_mode = dev_read_bool(dev, "u-boot,spl-fifo-mode");
  82 #endif
  83
  84         /*
  85          * 'clock-freq-min-max' is deprecated
  86          * (see https://github.com/torvalds/linux/commit/b023030f10573de738bbe8df63d43acab64c9f7b)
  87          */
  88         if (dev_read_u32_array(dev, "clock-freq-min-max", priv->minmax, 2)) {
  89                 int val = dev_read_u32_default(dev, "max-frequency", -EINVAL);
  90
  91                 if (val < 0)
  92                         return val;
  93
  94                 priv->minmax[0] = 400000;  /* 400 kHz */
  95                 priv->minmax[1] = val;
  96         } else {
  97                 debug("%s: 'clock-freq-min-max' property was deprecated.\n",
  98                       __func__);
  99         }
 100
 101         return 0;
 102 }
 103
 104 static int rockchip_dwmmc_probe(struct udevice *dev)
 105 {
 106         struct rockchip_mmc_plat *plat = dev_get_plat(dev);
 107         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 108         struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
 109         struct dwmci_host *host = &priv->host;
 110         int ret;
 111
 112 #if CONFIG_IS_ENABLED(OF_PLATDATA)
 113         struct dtd_rockchip_rk3288_dw_mshc *dtplat = &plat->dtplat;
 114
 115         host->name = dev->name;
 116         host->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
 117         host->buswidth = dtplat->bus_width;
 118         host->get_mmc_clk = rockchip_dwmmc_get_mmc_clk;
 119         host->priv = dev;
 120         host->dev_index = 0;
 121         priv->fifo_depth = dtplat->fifo_depth;
 122         priv->fifo_mode = dtplat->u_boot_spl_fifo_mode;
 123         priv->minmax[0] = 400000;  /*  400 kHz */
 124         priv->minmax[1] = dtplat->max_frequency;
 125
 126         ret = clk_get_by_phandle(dev, &dtplat->clocks[1], &priv->clk);
 127         if (ret < 0)
 128                 return ret;
 129 #else
 130         ret = clk_get_by_index(dev, 1, &priv->clk);
 131         if (ret < 0)
 132                 return ret;
 133 #endif
 134         host->fifoth_val = MSIZE(0x2) |
 135                 RX_WMARK(priv->fifo_depth / 2 - 1) |
 136                 TX_WMARK(priv->fifo_depth / 2);
 137
 138         host->fifo_mode = priv->fifo_mode;
 139
 140 #ifdef CONFIG_MMC_PWRSEQ
 141         /* Enable power if needed */
 142         ret = mmc_pwrseq_get_power(dev, &plat->cfg);
 143         if (!ret) {
 144                 ret = pwrseq_set_power(plat->cfg.pwr_dev, true);
 145                 if (ret)
 146                         return ret;
 147         }
 148 #endif
 149         dwmci_setup_cfg(&plat->cfg, host, priv->minmax[1], priv->minmax[0]);
 150         host->mmc = &plat->mmc;
 151         host->mmc->priv = &priv->host;
 152         host->mmc->dev = dev;
 153         upriv->mmc = host->mmc;
 154
 155         return dwmci_probe(dev);
 156 }
 157
 158 static int rockchip_dwmmc_bind(struct udevice *dev)
 159 {
 160         struct rockchip_mmc_plat *plat = dev_get_plat(dev);
 161
 162         return dwmci_bind(dev, &plat->mmc, &plat->cfg);
 163 }
 164
 165 static const struct udevice_id rockchip_dwmmc_ids[] = {
 166         { .compatible = "rockchip,rk2928-dw-mshc" },
 167         { .compatible = "rockchip,rk3288-dw-mshc" },
 168         { }
 169 };
 170
 171 U_BOOT_DRIVER(rockchip_rk3288_dw_mshc) = {
 172         .name           = "rockchip_rk3288_dw_mshc",
 173         .id             = UCLASS_MMC,
 174         .of_match       = rockchip_dwmmc_ids,
 175         .of_to_plat = rockchip_dwmmc_of_to_plat,
 176         .ops            = &dm_dwmci_ops,
 177         .bind           = rockchip_dwmmc_bind,
 178         .probe          = rockchip_dwmmc_probe,
 179         .priv_auto      = sizeof(struct rockchip_dwmmc_priv),
 180         .plat_auto      = sizeof(struct rockchip_mmc_plat),
 181 };
 182
 183 DM_DRIVER_ALIAS(rockchip_rk3288_dw_mshc, rockchip_rk2928_dw_mshc)
 184 DM_DRIVER_ALIAS(rockchip_rk3288_dw_mshc, rockchip_rk3328_dw_mshc)
 185 DM_DRIVER_ALIAS(rockchip_rk3288_dw_mshc, rockchip_rk3368_dw_mshc)