[U-Boot] [PATCH 4/7] STiH410: Add STi SDHCI driver
patrice.chotard at st.com
patrice.chotard at st.com
Thu Feb 2 18:00:38 CET 2017
From: Patrice Chotard <patrice.chotard at st.com>
Add SDHCI host controller found on STMicroelctronics SoCs
Signed-off-by: Patrice Chotard <patrice.chotard at st.com>
---
arch/arm/Kconfig | 2 +
arch/arm/include/asm/arch-stih410/sdhci.h | 69 +++++++++++++++
drivers/mmc/Kconfig | 7 ++
drivers/mmc/Makefile | 1 +
drivers/mmc/sti_sdhci.c | 140 ++++++++++++++++++++++++++++++
5 files changed, 219 insertions(+)
create mode 100644 arch/arm/include/asm/arch-stih410/sdhci.h
create mode 100644 drivers/mmc/sti_sdhci.c
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b91a5b7..477f36b 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -987,6 +987,8 @@ config ARCH_STI
select CPU_V7
select DM
select DM_SERIAL
+ select BLK
+ select DM_MMC
help
Support for STMicroelectronics STiH407/10 SoC family.
This SoC is used on Linaro 96Board STiH410-B2260
diff --git a/arch/arm/include/asm/arch-stih410/sdhci.h b/arch/arm/include/asm/arch-stih410/sdhci.h
new file mode 100644
index 0000000..f45b961
--- /dev/null
+++ b/arch/arm/include/asm/arch-stih410/sdhci.h
@@ -0,0 +1,69 @@
+/*
+ * (C) Copyright 2017 Patrice Chotard <patrice.chotard at 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_ */
diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
index 0c07781..dfdec27 100644
--- a/drivers/mmc/Kconfig
+++ b/drivers/mmc/Kconfig
@@ -287,6 +287,13 @@ config MMC_SDHCI_SPEAR
If unsure, say N.
+config MMC_SDHCI_STI
+ bool "SDHCI support for STMicroelectronics SoC"
+ depends on MMC_SDHCI
+ help
+ This selects the Secure Digital Host Controller Interface (SDHCI)
+ on STMicroelectronics STiH410 SoC.
+
config MMC_SDHCI_XENON
bool "SDHCI support for the Xenon SDHCI controller"
depends on MMC_SDHCI && DM_MMC && OF_CONTROL
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index e78bd0d..fc24926 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -62,6 +62,7 @@ obj-$(CONFIG_MMC_SDHCI_PIC32) += pic32_sdhci.o
obj-$(CONFIG_MMC_SDHCI_ROCKCHIP) += rockchip_sdhci.o
obj-$(CONFIG_MMC_SDHCI_S5P) += s5p_sdhci.o
obj-$(CONFIG_MMC_SDHCI_SPEAR) += spear_sdhci.o
+obj-$(CONFIG_MMC_SDHCI_STI) += sti_sdhci.o
obj-$(CONFIG_MMC_SDHCI_TEGRA) += tegra_mmc.o
obj-$(CONFIG_MMC_SDHCI_XENON) += xenon_sdhci.o
obj-$(CONFIG_MMC_SDHCI_ZYNQ) += zynq_sdhci.o
diff --git a/drivers/mmc/sti_sdhci.c b/drivers/mmc/sti_sdhci.c
new file mode 100644
index 0000000..7a76983
--- /dev/null
+++ b/drivers/mmc/sti_sdhci.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright (c) 2017
+ * Patrice Chotard <patrice.chotard at st.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <mmc.h>
+#include <sdhci.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/sdhci.h>
+#include <asm/arch/sti.h>
+#include <asm/arch/syscfg.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct sti_sdhci_plat {
+ struct mmc_config cfg;
+ struct mmc mmc;
+};
+
+/**
+ * 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);
+}
+
+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, count, 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
+ */
+
+ fdt_getprop(gd->fdt_blob, dev->of_offset, "resets", &count);
+ if (count < 0)
+ mmc_instance = 0;
+ else
+ mmc_instance = 1;
+
+ 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,
+ "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),
+};
--
1.9.1
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