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 #if !CONFIG_IS_ENABLED(OF_PLATDATA)
  56         struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
  57         struct dwmci_host *host = &priv->host;
  58
  59         host->name = dev->name;
  60         host->ioaddr = dev_read_addr_ptr(dev);
  61         host->buswidth = dev_read_u32_default(dev, "bus-width", 4);
  62         host->get_mmc_clk = rockchip_dwmmc_get_mmc_clk;
  63         host->priv = dev;
  64
  65         /* use non-removeable as sdcard and emmc as judgement */
  66         if (dev_read_bool(dev, "non-removable"))
  67                 host->dev_index = 0;
  68         else
  69                 host->dev_index = 1;
  70
  71         priv->fifo_depth = dev_read_u32_default(dev, "fifo-depth", 0);
  72
  73         if (priv->fifo_depth < 0)
  74                 return -EINVAL;
  75         priv->fifo_mode = dev_read_bool(dev, "fifo-mode");
  76
  77 #ifdef CONFIG_SPL_BUILD
  78         if (!priv->fifo_mode)
  79                 priv->fifo_mode = dev_read_bool(dev, "u-boot,spl-fifo-mode");
  80 #endif
  81
  82         /*
  83          * 'clock-freq-min-max' is deprecated
  84          * (see https://github.com/torvalds/linux/commit/b023030f10573de738bbe8df63d43acab64c9f7b)
  85          */
  86         if (dev_read_u32_array(dev, "clock-freq-min-max", priv->minmax, 2)) {
  87                 int val = dev_read_u32_default(dev, "max-frequency", -EINVAL);
  88
  89                 if (val < 0)
  90                         return val;
  91
  92                 priv->minmax[0] = 400000;  /* 400 kHz */
  93                 priv->minmax[1] = val;
  94         } else {
  95                 debug("%s: 'clock-freq-min-max' property was deprecated.\n",
  96                       __func__);
  97         }
  98 #endif
  99         return 0;
 100 }
 101
 102 static int rockchip_dwmmc_probe(struct udevice *dev)
 103 {
 104         struct rockchip_mmc_plat *plat = dev_get_plat(dev);
 105         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 106         struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
 107         struct dwmci_host *host = &priv->host;
 108         int ret;
 109
 110 #if CONFIG_IS_ENABLED(OF_PLATDATA)
 111         struct dtd_rockchip_rk3288_dw_mshc *dtplat = &plat->dtplat;
 112
 113         host->name = dev->name;
 114         host->ioaddr = map_sysmem(dtplat->reg[0], dtplat->reg[1]);
 115         host->buswidth = dtplat->bus_width;
 116         host->get_mmc_clk = rockchip_dwmmc_get_mmc_clk;
 117         host->priv = dev;
 118         host->dev_index = 0;
 119         priv->fifo_depth = dtplat->fifo_depth;
 120         priv->fifo_mode = 0;
 121         priv->minmax[0] = 400000;  /*  400 kHz */
 122         priv->minmax[1] = dtplat->max_frequency;
 123
 124         ret = clk_get_by_driver_info(dev, dtplat->clocks, &priv->clk);
 125         if (ret < 0)
 126                 return ret;
 127 #else
 128         ret = clk_get_by_index(dev, 0, &priv->clk);
 129         if (ret < 0)
 130                 return ret;
 131 #endif
 132         host->fifoth_val = MSIZE(0x2) |
 133                 RX_WMARK(priv->fifo_depth / 2 - 1) |
 134                 TX_WMARK(priv->fifo_depth / 2);
 135
 136         host->fifo_mode = priv->fifo_mode;
 137
 138 #ifdef CONFIG_MMC_PWRSEQ
 139         /* Enable power if needed */
 140         ret = mmc_pwrseq_get_power(dev, &plat->cfg);
 141         if (!ret) {
 142                 ret = pwrseq_set_power(plat->cfg.pwr_dev, true);
 143                 if (ret)
 144                         return ret;
 145         }
 146 #endif
 147         dwmci_setup_cfg(&plat->cfg, host, priv->minmax[1], priv->minmax[0]);
 148         host->mmc = &plat->mmc;
 149         host->mmc->priv = &priv->host;
 150         host->mmc->dev = dev;
 151         upriv->mmc = host->mmc;
 152
 153         return dwmci_probe(dev);
 154 }
 155
 156 static int rockchip_dwmmc_bind(struct udevice *dev)
 157 {
 158         struct rockchip_mmc_plat *plat = dev_get_plat(dev);
 159
 160         return dwmci_bind(dev, &plat->mmc, &plat->cfg);
 161 }
 162
 163 static const struct udevice_id rockchip_dwmmc_ids[] = {
 164         { .compatible = "rockchip,rk2928-dw-mshc" },
 165         { .compatible = "rockchip,rk3288-dw-mshc" },
 166         { }
 167 };
 168
 169 U_BOOT_DRIVER(rockchip_rk3288_dw_mshc) = {
 170         .name           = "rockchip_rk3288_dw_mshc",
 171         .id             = UCLASS_MMC,
 172         .of_match       = rockchip_dwmmc_ids,
 173         .of_to_plat = rockchip_dwmmc_of_to_plat,
 174         .ops            = &dm_dwmci_ops,
 175         .bind           = rockchip_dwmmc_bind,
 176         .probe          = rockchip_dwmmc_probe,
 177         .priv_auto      = sizeof(struct rockchip_dwmmc_priv),
 178         .plat_auto      = sizeof(struct rockchip_mmc_plat),
 179 };
 180
 181 DM_DRIVER_ALIAS(rockchip_rk3288_dw_mshc, rockchip_rk3328_dw_mshc)
 182 DM_DRIVER_ALIAS(rockchip_rk3288_dw_mshc, rockchip_rk3368_dw_mshc)