[U-Boot] [PATCH 4/7] STiH410: Add STi SDHCI driver
Simon Glass
sjg at chromium.org
Fri Feb 10 17:22:39 CET 2017
Hi Patrice,
On 2 February 2017 at 10:00, <patrice.chotard at st.com> wrote:
> 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
>
Reviewed-by: Simon Glass <sjg at chromium.org>
nits below
> 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);
How about
if (fdt_getprop(gd->fdt_blob, dev_of_offset(dev), "resets", NULL);
mmc_instance = 0;
else
mmc_instance = 1;
> + 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);
> +
drop blank line
> + 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
>
Regards,
Simon
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