1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2022 Nuvoton Technology Corp.
4 */
5
6 #include <common.h>
7 #include <dm.h>
8 #include <sdhci.h>
9 #include <clk.h>
10 #include <power/regulator.h>
11
12 #define NPCM_SDHC_MIN_FREQ 400000
13
14 struct npcm_sdhci_plat {
15 struct mmc_config cfg;
16 struct mmc mmc;
17 };
18
npcm_sdhci_probe(struct udevice * dev)19 static int npcm_sdhci_probe(struct udevice *dev)
20 {
21 struct npcm_sdhci_plat *plat = dev_get_plat(dev);
22 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
23 struct sdhci_host *host = dev_get_priv(dev);
24 struct udevice *vqmmc_supply;
25 int vqmmc_uv, ret;
26 struct clk clk;
27
28 host->name = dev->name;
29 host->ioaddr = dev_read_addr_ptr(dev);
30 host->max_clk = dev_read_u32_default(dev, "clock-frequency", 0);
31
32 ret = clk_get_by_index(dev, 0, &clk);
33 if (!ret && host->max_clk) {
34 ret = clk_set_rate(&clk, host->max_clk);
35 if (ret < 0)
36 return ret;
37 }
38
39 if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
40 device_get_supply_regulator(dev, "vqmmc-supply", &vqmmc_supply);
41 vqmmc_uv = dev_read_u32_default(dev, "vqmmc-microvolt", 0);
42 /* Set IO voltage */
43 if (vqmmc_supply && vqmmc_uv)
44 regulator_set_value(vqmmc_supply, vqmmc_uv);
45 }
46
47 host->index = dev_read_u32_default(dev, "index", 0);
48 ret = mmc_of_parse(dev, &plat->cfg);
49 if (ret)
50 return ret;
51
52 host->mmc = &plat->mmc;
53 host->mmc->priv = host;
54 host->mmc->dev = dev;
55 upriv->mmc = host->mmc;
56
57 ret = sdhci_setup_cfg(&plat->cfg, host, 0, NPCM_SDHC_MIN_FREQ);
58 if (ret)
59 return ret;
60
61 return sdhci_probe(dev);
62 }
63
npcm_sdhci_bind(struct udevice * dev)64 static int npcm_sdhci_bind(struct udevice *dev)
65 {
66 struct npcm_sdhci_plat *plat = dev_get_plat(dev);
67
68 return sdhci_bind(dev, &plat->mmc, &plat->cfg);
69 }
70
71 static const struct udevice_id npcm_mmc_ids[] = {
72 { .compatible = "nuvoton,npcm750-sdhci" },
73 { .compatible = "nuvoton,npcm845-sdhci" },
74 { }
75 };
76
77 U_BOOT_DRIVER(npcm_sdhci_drv) = {
78 .name = "npcm_sdhci",
79 .id = UCLASS_MMC,
80 .of_match = npcm_mmc_ids,
81 .ops = &sdhci_ops,
82 .bind = npcm_sdhci_bind,
83 .probe = npcm_sdhci_probe,
84 .priv_auto = sizeof(struct sdhci_host),
85 .plat_auto = sizeof(struct npcm_sdhci_plat),
86 };
87