2 * Copyright (c) 2013 Google, Inc
4 * SPDX-License-Identifier: GPL-2.0+
15 #include <asm/arch/clock.h>
16 #include <asm/arch/periph.h>
17 #include <linux/err.h>
19 DECLARE_GLOBAL_DATA_PTR;
21 struct rockchip_dwmmc_priv {
23 struct rk3288_grf *grf;
24 struct dwmci_host host;
27 static uint rockchip_dwmmc_get_mmc_clk(struct dwmci_host *host, uint freq)
29 struct udevice *dev = host->priv;
30 struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
33 ret = clk_set_periph_rate(priv->clk, PERIPH_ID_SDMMC0 + host->dev_index,
36 debug("%s: err=%d\n", __func__, ret);
43 static int rockchip_dwmmc_ofdata_to_platdata(struct udevice *dev)
45 struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
46 struct dwmci_host *host = &priv->host;
48 host->name = dev->name;
49 host->ioaddr = (void *)dev_get_addr(dev);
50 host->buswidth = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
52 host->get_mmc_clk = rockchip_dwmmc_get_mmc_clk;
55 /* use non-removeable as sdcard and emmc as judgement */
56 if (fdtdec_get_bool(gd->fdt_blob, dev->of_offset, "non-removable"))
64 static int rockchip_dwmmc_probe(struct udevice *dev)
66 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
67 struct rockchip_dwmmc_priv *priv = dev_get_priv(dev);
68 struct dwmci_host *host = &priv->host;
69 struct udevice *pwr_dev __maybe_unused;
74 priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
75 if (IS_ERR(priv->grf))
76 return PTR_ERR(priv->grf);
77 ret = uclass_get_device(UCLASS_CLK, CLK_GENERAL, &priv->clk);
81 if (fdtdec_get_int_array(gd->fdt_blob, dev->of_offset,
82 "clock-freq-min-max", minmax, 2))
85 fifo_depth = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
90 host->fifoth_val = MSIZE(0x2) |
91 RX_WMARK(fifo_depth / 2 - 1) | TX_WMARK(fifo_depth / 2);
93 if (fdtdec_get_bool(gd->fdt_blob, dev->of_offset, "fifo-mode"))
94 host->fifo_mode = true;
97 /* Enable power if needed */
98 ret = uclass_get_device_by_phandle(UCLASS_PWRSEQ, dev, "mmc-pwrseq",
101 ret = pwrseq_set_power(pwr_dev, true);
106 ret = add_dwmci(host, minmax[1], minmax[0]);
110 upriv->mmc = host->mmc;
115 static const struct udevice_id rockchip_dwmmc_ids[] = {
116 { .compatible = "rockchip,rk3288-dw-mshc" },
120 U_BOOT_DRIVER(rockchip_dwmmc_drv) = {
121 .name = "rockchip_dwmmc",
123 .of_match = rockchip_dwmmc_ids,
124 .ofdata_to_platdata = rockchip_dwmmc_ofdata_to_platdata,
125 .probe = rockchip_dwmmc_probe,
126 .priv_auto_alloc_size = sizeof(struct rockchip_dwmmc_priv),
130 static int rockchip_dwmmc_pwrseq_set_power(struct udevice *dev, bool enable)
132 struct gpio_desc reset;
135 ret = gpio_request_by_name(dev, "reset-gpios", 0, &reset, GPIOD_IS_OUT);
138 dm_gpio_set_value(&reset, 1);
140 dm_gpio_set_value(&reset, 0);
146 static const struct pwrseq_ops rockchip_dwmmc_pwrseq_ops = {
147 .set_power = rockchip_dwmmc_pwrseq_set_power,
150 static const struct udevice_id rockchip_dwmmc_pwrseq_ids[] = {
151 { .compatible = "mmc-pwrseq-emmc" },
155 U_BOOT_DRIVER(rockchip_dwmmc_pwrseq_drv) = {
156 .name = "mmc_pwrseq_emmc",
158 .of_match = rockchip_dwmmc_pwrseq_ids,
159 .ops = &rockchip_dwmmc_pwrseq_ops,