1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
4 * Author(s): Patrice Chotard, <patrice.chotard@st.com> for STMicroelectronics.
11 #include <reset-uclass.h>
13 #include <asm/arch/sdhci.h>
15 DECLARE_GLOBAL_DATA_PTR;
17 struct sti_sdhci_plat {
18 struct mmc_config cfg;
20 struct reset_ctl reset;
25 * sti_mmc_core_config: configure the Arasan HC
28 * Description: this function is to configure the Arasan MMC HC.
29 * This should be called when the system starts in case of, on the SoC,
30 * it is needed to configure the host controller.
31 * This happens on some SoCs, i.e. StiH410, where the MMC0 inside the flashSS
32 * needs to be configured as MMC 4.5 to have full capabilities.
33 * W/o these settings the SDHCI could configure and use the embedded controller
34 * with limited features.
36 static int sti_mmc_core_config(struct udevice *dev)
38 struct sti_sdhci_plat *plat = dev_get_platdata(dev);
39 struct sdhci_host *host = dev_get_priv(dev);
42 /* only MMC1 has a reset line */
44 ret = reset_deassert(&plat->reset);
46 pr_err("MMC1 deassert failed: %d", ret);
51 writel(STI_FLASHSS_MMC_CORE_CONFIG_1,
52 host->ioaddr + FLASHSS_MMC_CORE_CONFIG_1);
55 writel(STI_FLASHSS_MMC_CORE_CONFIG2,
56 host->ioaddr + FLASHSS_MMC_CORE_CONFIG_2);
57 writel(STI_FLASHSS_MMC_CORE_CONFIG3,
58 host->ioaddr + FLASHSS_MMC_CORE_CONFIG_3);
60 writel(STI_FLASHSS_SDCARD_CORE_CONFIG2,
61 host->ioaddr + FLASHSS_MMC_CORE_CONFIG_2);
62 writel(STI_FLASHSS_SDCARD_CORE_CONFIG3,
63 host->ioaddr + FLASHSS_MMC_CORE_CONFIG_3);
65 writel(STI_FLASHSS_MMC_CORE_CONFIG4,
66 host->ioaddr + FLASHSS_MMC_CORE_CONFIG_4);
71 static int sti_sdhci_probe(struct udevice *dev)
73 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
74 struct sti_sdhci_plat *plat = dev_get_platdata(dev);
75 struct sdhci_host *host = dev_get_priv(dev);
79 * identify current mmc instance, mmc1 has a reset, not mmc0
80 * MMC0 is wired to the SD slot,
81 * MMC1 is wired on the high speed connector
83 ret = reset_get_by_index(dev, 0, &plat->reset);
92 ret = sti_mmc_core_config(dev);
96 host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
97 SDHCI_QUIRK_32BIT_DMA_ADDR |
98 SDHCI_QUIRK_NO_HISPD_BIT;
100 host->host_caps = MMC_MODE_DDR_52MHz;
101 host->mmc = &plat->mmc;
102 host->mmc->dev = dev;
103 host->mmc->priv = host;
105 ret = sdhci_setup_cfg(&plat->cfg, host, 50000000, 400000);
109 upriv->mmc = host->mmc;
111 return sdhci_probe(dev);
114 static int sti_sdhci_ofdata_to_platdata(struct udevice *dev)
116 struct sdhci_host *host = dev_get_priv(dev);
118 host->name = strdup(dev->name);
119 host->ioaddr = (void *)devfdt_get_addr(dev);
121 host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
127 static int sti_sdhci_bind(struct udevice *dev)
129 struct sti_sdhci_plat *plat = dev_get_platdata(dev);
131 return sdhci_bind(dev, &plat->mmc, &plat->cfg);
134 static const struct udevice_id sti_sdhci_ids[] = {
135 { .compatible = "st,sdhci" },
139 U_BOOT_DRIVER(sti_mmc) = {
142 .of_match = sti_sdhci_ids,
143 .bind = sti_sdhci_bind,
145 .ofdata_to_platdata = sti_sdhci_ofdata_to_platdata,
146 .probe = sti_sdhci_probe,
147 .priv_auto_alloc_size = sizeof(struct sdhci_host),
148 .platdata_auto_alloc_size = sizeof(struct sti_sdhci_plat),