2 * Copyright (C) 2015 Atmel Corporation
3 * Wenyou.Yang <wenyou.yang@atmel.com>
5 * SPDX-License-Identifier: GPL-2.0+
13 #include <asm/arch/clk.h>
15 #define ATMEL_SDHC_MIN_FREQ 400000
18 int atmel_sdhci_init(void *regbase, u32 id)
20 struct sdhci_host *host;
21 u32 max_clk, min_clk = ATMEL_SDHC_MIN_FREQ;
23 host = (struct sdhci_host *)calloc(1, sizeof(struct sdhci_host));
25 printf("%s: sdhci_host calloc failed\n", __func__);
29 host->name = "atmel_sdhci";
30 host->ioaddr = regbase;
32 max_clk = at91_get_periph_generated_clk(id);
34 printf("%s: Failed to get the proper clock\n", __func__);
39 add_sdhci(host, max_clk, min_clk);
46 DECLARE_GLOBAL_DATA_PTR;
48 struct atmel_sdhci_plat {
49 struct mmc_config cfg;
53 static int atmel_sdhci_probe(struct udevice *dev)
55 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
56 struct atmel_sdhci_plat *plat = dev_get_platdata(dev);
57 struct sdhci_host *host = dev_get_priv(dev);
60 u32 clk_base, clk_mul;
65 ret = clk_get_by_index(dev, 0, &clk);
69 ret = clk_enable(&clk);
73 host->name = dev->name;
74 host->ioaddr = (void *)dev_get_addr(dev);
77 host->bus_width = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
80 caps = sdhci_readl(host, SDHCI_CAPABILITIES);
81 clk_base = (caps & SDHCI_CLOCK_V3_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
82 caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
83 clk_mul = (caps_1 & SDHCI_CLOCK_MUL_MASK) >> SDHCI_CLOCK_MUL_SHIFT;
84 gck_rate = clk_base * 1000000 * (clk_mul + 1);
86 ret = clk_get_by_index(dev, 1, &clk);
90 ret = clk_set_rate(&clk, gck_rate);
94 max_clk = clk_get_rate(&clk);
98 ret = sdhci_setup_cfg(&plat->cfg, host, max_clk, ATMEL_SDHC_MIN_FREQ);
102 host->mmc = &plat->mmc;
103 host->mmc->dev = dev;
104 host->mmc->priv = host;
105 upriv->mmc = host->mmc;
109 return sdhci_probe(dev);
112 static int atmel_sdhci_bind(struct udevice *dev)
114 struct atmel_sdhci_plat *plat = dev_get_platdata(dev);
116 return sdhci_bind(dev, &plat->mmc, &plat->cfg);
119 static const struct udevice_id atmel_sdhci_ids[] = {
120 { .compatible = "atmel,sama5d2-sdhci" },
124 U_BOOT_DRIVER(atmel_sdhci_drv) = {
125 .name = "atmel_sdhci",
127 .of_match = atmel_sdhci_ids,
129 .bind = atmel_sdhci_bind,
130 .probe = atmel_sdhci_probe,
131 .priv_auto_alloc_size = sizeof(struct sdhci_host),
132 .platdata_auto_alloc_size = sizeof(struct atmel_sdhci_plat),