--- /dev/null
+/*
+ * (C) Copyright 2017 Patrice Chotard <patrice.chotard@st.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __STI_SDHCI_H__
+#define __STI_SDHCI_H__
+
+#define FLASHSS_MMC_CORE_CONFIG_1 0x400
+#define FLASHSS_MMC_CORECFG_TIMEOUT_CLK_UNIT_MHZ BIT(24)
+#define FLASHSS_MMC_CORECFG_TIMEOUT_CLK_FREQ_MIN BIT(12)
+
+#define STI_FLASHSS_MMC_CORE_CONFIG_1 \
+ (FLASHSS_MMC_CORECFG_TIMEOUT_CLK_UNIT_MHZ | \
+ FLASHSS_MMC_CORECFG_TIMEOUT_CLK_FREQ_MIN)
+
+#define FLASHSS_MMC_CORE_CONFIG_2 0x404
+#define FLASHSS_MMC_CORECFG_HIGH_SPEED BIT(28)
+#define FLASHSS_MMC_CORECFG_8BIT_EMMC BIT(20)
+#define MAX_BLK_LENGTH_1024 BIT(16)
+#define BASE_CLK_FREQ_200 0xc8
+
+#define STI_FLASHSS_MMC_CORE_CONFIG2 \
+ (FLASHSS_MMC_CORECFG_HIGH_SPEED | \
+ FLASHSS_MMC_CORECFG_8BIT_EMMC | \
+ MAX_BLK_LENGTH_1024 | \
+ BASE_CLK_FREQ_200 << 0)
+
+#define STI_FLASHSS_SDCARD_CORE_CONFIG2 \
+ (FLASHSS_MMC_CORECFG_HIGH_SPEED | \
+ MAX_BLK_LENGTH_1024 | \
+ BASE_CLK_FREQ_200)
+
+#define FLASHSS_MMC_CORE_CONFIG_3 0x408
+#define FLASHSS_MMC_CORECFG_SLOT_TYPE_EMMC BIT(28)
+#define FLASHSS_MMC_CORECFG_ASYNCH_INTR_SUPPORT BIT(20)
+#define FLASHSS_MMC_CORECFG_3P3_VOLT BIT(8)
+#define FLASHSS_MMC_CORECFG_SUSP_RES_SUPPORT BIT(4)
+#define FLASHSS_MMC_CORECFG_SDMA BIT(0)
+
+#define STI_FLASHSS_MMC_CORE_CONFIG3 \
+ (FLASHSS_MMC_CORECFG_SLOT_TYPE_EMMC | \
+ FLASHSS_MMC_CORECFG_ASYNCH_INTR_SUPPORT | \
+ FLASHSS_MMC_CORECFG_3P3_VOLT | \
+ FLASHSS_MMC_CORECFG_SUSP_RES_SUPPORT | \
+ FLASHSS_MMC_CORECFG_SDMA)
+
+#define STI_FLASHSS_SDCARD_CORE_CONFIG3 \
+ (FLASHSS_MMC_CORECFG_ASYNCH_INTR_SUPPORT | \
+ FLASHSS_MMC_CORECFG_3P3_VOLT | \
+ FLASHSS_MMC_CORECFG_SUSP_RES_SUPPORT | \
+ FLASHSS_MMC_CORECFG_SDMA)
+
+#define FLASHSS_MMC_CORE_CONFIG_4 0x40c
+#define FLASHSS_MMC_CORECFG_D_DRIVER_SUPPORT BIT(20)
+#define FLASHSS_MMC_CORECFG_C_DRIVER_SUPPORT BIT(16)
+#define FLASHSS_MMC_CORECFG_A_DRIVER_SUPPORT BIT(12)
+
+#define STI_FLASHSS_MMC_CORE_CONFIG4 \
+ (FLASHSS_MMC_CORECFG_D_DRIVER_SUPPORT | \
+ FLASHSS_MMC_CORECFG_C_DRIVER_SUPPORT | \
+ FLASHSS_MMC_CORECFG_A_DRIVER_SUPPORT)
+
+#define ST_MMC_CCONFIG_REG_5 0x210
+#define SYSCONF_MMC1_ENABLE_BIT 3
+
+#endif /* _STI_SDHCI_H_ */
--- /dev/null
+/*
+ * Copyright (c) 2017
+ * Patrice Chotard <patrice.chotard@st.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <mmc.h>
+#include <sdhci.h>
+#include <asm/arch/sdhci.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct sti_sdhci_plat {
+ struct mmc_config cfg;
+ struct mmc mmc;
+};
+
+/*
+ * used to get access to MMC1 reset,
+ * will be removed when STi reset driver will be available
+ */
+#define STIH410_SYSCONF5_BASE 0x092b0000
+
+/**
+ * sti_mmc_core_config: configure the Arasan HC
+ * @regbase: base address
+ * @mmc_instance: mmc instance id
+ * Description: this function is to configure the Arasan MMC HC.
+ * This should be called when the system starts in case of, on the SoC,
+ * it is needed to configure the host controller.
+ * This happens on some SoCs, i.e. StiH410, where the MMC0 inside the flashSS
+ * needs to be configured as MMC 4.5 to have full capabilities.
+ * W/o these settings the SDHCI could configure and use the embedded controller
+ * with limited features.
+ */
+static void sti_mmc_core_config(const u32 regbase, int mmc_instance)
+{
+ unsigned long *sysconf;
+
+ /* only MMC1 has a reset line */
+ if (mmc_instance) {
+ sysconf = (unsigned long *)(STIH410_SYSCONF5_BASE +
+ ST_MMC_CCONFIG_REG_5);
+ generic_set_bit(SYSCONF_MMC1_ENABLE_BIT, sysconf);
+ }
+
+ writel(STI_FLASHSS_MMC_CORE_CONFIG_1,
+ regbase + FLASHSS_MMC_CORE_CONFIG_1);
+
+ if (mmc_instance) {
+ writel(STI_FLASHSS_MMC_CORE_CONFIG2,
+ regbase + FLASHSS_MMC_CORE_CONFIG_2);
+ writel(STI_FLASHSS_MMC_CORE_CONFIG3,
+ regbase + FLASHSS_MMC_CORE_CONFIG_3);
+ } else {
+ writel(STI_FLASHSS_SDCARD_CORE_CONFIG2,
+ regbase + FLASHSS_MMC_CORE_CONFIG_2);
+ writel(STI_FLASHSS_SDCARD_CORE_CONFIG3,
+ regbase + FLASHSS_MMC_CORE_CONFIG_3);
+ }
+ writel(STI_FLASHSS_MMC_CORE_CONFIG4,
+ regbase + FLASHSS_MMC_CORE_CONFIG_4);
+}
+
+static int sti_sdhci_probe(struct udevice *dev)
+{
+ struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
+ struct sti_sdhci_plat *plat = dev_get_platdata(dev);
+ struct sdhci_host *host = dev_get_priv(dev);
+ int ret, mmc_instance;
+
+ /*
+ * identify current mmc instance, mmc1 has a reset, not mmc0
+ * MMC0 is wired to the SD slot,
+ * MMC1 is wired on the high speed connector
+ */
+
+ if (fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "resets", NULL))
+ mmc_instance = 1;
+ else
+ mmc_instance = 0;
+
+ sti_mmc_core_config((const u32) host->ioaddr, mmc_instance);
+
+ host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
+ SDHCI_QUIRK_32BIT_DMA_ADDR |
+ SDHCI_QUIRK_NO_HISPD_BIT;
+
+ host->host_caps = MMC_MODE_DDR_52MHz;
+
+ ret = sdhci_setup_cfg(&plat->cfg, host, 50000000, 400000);
+ if (ret)
+ return ret;
+
+ host->mmc = &plat->mmc;
+ host->mmc->priv = host;
+ host->mmc->dev = dev;
+ upriv->mmc = host->mmc;
+
+ return sdhci_probe(dev);
+}
+
+static int sti_sdhci_ofdata_to_platdata(struct udevice *dev)
+{
+ struct sdhci_host *host = dev_get_priv(dev);
+
+ host->name = strdup(dev->name);
+ host->ioaddr = (void *)dev_get_addr(dev);
+
+ host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
+ "bus-width", 4);
+
+ return 0;
+}
+
+static int sti_sdhci_bind(struct udevice *dev)
+{
+ struct sti_sdhci_plat *plat = dev_get_platdata(dev);
+
+ return sdhci_bind(dev, &plat->mmc, &plat->cfg);
+}
+
+static const struct udevice_id sti_sdhci_ids[] = {
+ { .compatible = "st,sdhci" },
+ { }
+};
+
+U_BOOT_DRIVER(sti_mmc) = {
+ .name = "sti_sdhci",
+ .id = UCLASS_MMC,
+ .of_match = sti_sdhci_ids,
+ .bind = sti_sdhci_bind,
+ .ops = &sdhci_ops,
+ .ofdata_to_platdata = sti_sdhci_ofdata_to_platdata,
+ .probe = sti_sdhci_probe,
+ .priv_auto_alloc_size = sizeof(struct sdhci_host),
+ .platdata_auto_alloc_size = sizeof(struct sti_sdhci_plat),
+};
projects / people / ms / u-boot.git / commitdiff
