[PATCH v2 1/8] mmc: ca_dw_mmc: add DesignWare based DM support for CAxxxx SoCs
Jaehoon Chung
jh80.chung at samsung.com
Tue Mar 24 08:16:47 CET 2020
Hi,
On 3/20/20 9:57 AM, Alex Nemirovsky wrote:
> From: Arthur Li <arthur.li at cortina-access.com>
>
> Initial DesignWare based DM support for Cortina Access CAxxxx SoCs.
>
> Signed-off-by: Arthur Li <arthur.li at cortina-access.com>
> Signed-off-by: Alex Nemirovsky <alex.nemirovsky at cortina-access.com>
> CC: Peng Fan <peng.fan at nxp.com>
I didn't receive any reply about my previous comments.
And Is there patch v3 or v2? Subject is v2..but change log is v3.
What is correct version?
Best Regards,
Jaehoon Chung
>
> ---
>
> Changes in v3: None
> Changes in v2:
> - Add I2C controller
> - Add LED controller
> - Add SPI NAND and NOR controller
>
> MAINTAINERS | 2 +
> drivers/mmc/Kconfig | 11 +++
> drivers/mmc/Makefile | 1 +
> drivers/mmc/ca_dw_mmc.c | 181 ++++++++++++++++++++++++++++++++++++++++++++++++
> 4 files changed, 195 insertions(+)
> create mode 100644 drivers/mmc/ca_dw_mmc.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 82e4159..bb45d3c 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -180,6 +180,7 @@ F: board/cortina/common/
> F: drivers/gpio/cortina_gpio.c
> F: drivers/watchdog/cortina_wdt.c
> F: drivers/serial/serial_cortina.c
> +F: drivers/mmc/ca_dw_mmc.c
>
> ARM/CZ.NIC TURRIS MOX SUPPORT
> M: Marek Behun <marek.behun at nic.cz>
> @@ -670,6 +671,7 @@ F: board/cortina/common/
> F: drivers/gpio/cortina_gpio.c
> F: drivers/watchdog/cortina_wdt.c
> F: drivers/serial/serial_cortina.c
> +F: drivers/mmc/ca_dw_mmc.c
>
> MIPS MSCC
> M: Gregory CLEMENT <gregory.clement at bootlin.com>
> diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
> index 2f0eedc..bb38787 100644
> --- a/drivers/mmc/Kconfig
> +++ b/drivers/mmc/Kconfig
> @@ -205,6 +205,17 @@ config MMC_DW
> block, this provides host support for SD and MMC interfaces, in both
> PIO, internal DMA mode and external DMA mode.
>
> +config MMC_DW_CORTINA
> + bool "Cortina specific extensions for Synopsys DW Memory Card Interface"
> + depends on DM_MMC
> + depends on MMC_DW
> + depends on BLK
> + default n
> + help
> + This selects support for Cortina SoC specific extensions to the
> + Synopsys DesignWare Memory Card Interface driver. Select this option
> + for platforms based on Cortina CAxxxx Soc's.
> +
> config MMC_DW_EXYNOS
> bool "Exynos specific extensions for Synopsys DW Memory Card Interface"
> depends on ARCH_EXYNOS
> diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
> index 9c1f8e5..615b724 100644
> --- a/drivers/mmc/Makefile
> +++ b/drivers/mmc/Makefile
> @@ -20,6 +20,7 @@ endif
> obj-$(CONFIG_ARM_PL180_MMCI) += arm_pl180_mmci.o
> obj-$(CONFIG_MMC_DAVINCI) += davinci_mmc.o
> obj-$(CONFIG_MMC_DW) += dw_mmc.o
> +obj-$(CONFIG_MMC_DW_CORTINA) += ca_dw_mmc.o
> obj-$(CONFIG_MMC_DW_EXYNOS) += exynos_dw_mmc.o
> obj-$(CONFIG_MMC_DW_K3) += hi6220_dw_mmc.o
> obj-$(CONFIG_MMC_DW_ROCKCHIP) += rockchip_dw_mmc.o
> diff --git a/drivers/mmc/ca_dw_mmc.c b/drivers/mmc/ca_dw_mmc.c
> new file mode 100644
> index 0000000..acbc850
> --- /dev/null
> +++ b/drivers/mmc/ca_dw_mmc.c
> @@ -0,0 +1,181 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * (C) Copyright 2019 Cortina Access
> + * Arthur Li <arthur.li at cortina-access.com>
> + */
> +
> +#include <common.h>
> +#include <dwmmc.h>
> +#include <fdtdec.h>
> +#include <linux/libfdt.h>
> +#include <malloc.h>
> +#include <errno.h>
> +#include <dm.h>
> +#include <mapmem.h>
> +
> +#define SD_CLK_SEL_MASK (0x3)
> +#define SD_DLL_DEFAULT (0x143000)
> +#define SD_SCLK_MAX (200000000)
> +
> +#define SD_CLK_SEL_200MHZ (0x2)
> +#define SD_CLK_SEL_100MHZ (0x1)
> +
> +#define IO_DRV_SD_DS_OFFSET (16)
> +#define IO_DRV_SD_DS_MASK (0xff << IO_DRV_SD_DS_OFFSET)
> +
> +#define MIN_FREQ (400000)
> +
> +DECLARE_GLOBAL_DATA_PTR;
> +
> +struct ca_mmc_plat {
> + struct mmc_config cfg;
> + struct mmc mmc;
> +};
> +
> +struct ca_dwmmc_priv_data {
> + struct dwmci_host host;
> + void __iomem *sd_dll_reg;
> + void __iomem *io_drv_reg;
> + u8 ds;
> +};
> +
> +static void ca_dwmci_clksel(struct dwmci_host *host)
> +{
> + struct ca_dwmmc_priv_data *priv = host->priv;
> + u32 val = readl(priv->sd_dll_reg);
> +
> + if (host->bus_hz >= 200000000) {
> + val &= ~SD_CLK_SEL_MASK;
> + val |= SD_CLK_SEL_200MHZ;
> + } else if (host->bus_hz >= 100000000) {
> + val &= ~SD_CLK_SEL_MASK;
> + val |= SD_CLK_SEL_100MHZ;
> + } else {
> + val &= ~SD_CLK_SEL_MASK;
> + }
> +
> + writel(val, priv->sd_dll_reg);
> +}
> +
> +static void ca_dwmci_board_init(struct dwmci_host *host)
> +{
> + struct ca_dwmmc_priv_data *priv = host->priv;
> + u32 val = readl(priv->io_drv_reg);
> +
> + writel(SD_DLL_DEFAULT, priv->sd_dll_reg);
> +
> + val &= ~IO_DRV_SD_DS_MASK;
> + if (priv && priv->ds)
> + val |= priv->ds << IO_DRV_SD_DS_OFFSET;
> + writel(val, priv->io_drv_reg);
> +}
> +
> +unsigned int ca_dwmci_get_mmc_clock(struct dwmci_host *host, uint freq)
> +{
> + struct ca_dwmmc_priv_data *priv = host->priv;
> + u8 sd_clk_sel = readl(priv->sd_dll_reg) & SD_CLK_SEL_MASK;
> + u8 clk_div;
> +
> + switch (sd_clk_sel) {
> + case 2:
> + clk_div = 1;
> + break;
> + case 1:
> + clk_div = 2;
> + break;
> + default:
> + clk_div = 4;
> + }
> +
> + return SD_SCLK_MAX / clk_div / (host->div + 1);
> +}
> +
> +static int ca_dwmmc_ofdata_to_platdata(struct udevice *dev)
> +{
> + struct ca_dwmmc_priv_data *priv = dev_get_priv(dev);
> + struct dwmci_host *host = &priv->host;
> + u32 tmp;
> +
> + host->name = dev->name;
> + host->dev_index = 0;
> +
> + host->buswidth = dev_read_u32_default(dev, "bus-width", 1);
> + if (host->buswidth != 1 && host->buswidth != 4)
> + return -EINVAL;
> +
> + host->bus_hz = dev_read_u32_default(dev, "max-frequency", 50000000);
> + priv->ds = dev_read_u32_default(dev, "io_ds", 0x33);
> + host->fifo_mode = dev_read_bool(dev, "fifo-mode");
> +
> + dev_read_u32(dev, "sd_dll_ctrl", &tmp);
> + priv->sd_dll_reg = map_sysmem((uintptr_t)tmp, sizeof(uintptr_t));
> + if (!priv->sd_dll_reg)
> + return -EINVAL;
> +
> + dev_read_u32(dev, "io_drv_ctrl", &tmp);
> + priv->io_drv_reg = map_sysmem((uintptr_t)tmp, sizeof(uintptr_t));
> + if (!priv->io_drv_reg)
> + return -EINVAL;
> +
> + host->ioaddr = dev_read_addr_ptr(dev);
> + if (host->ioaddr == (void *)FDT_ADDR_T_NONE) {
> + printf("DWMMC: base address is invalid\n");
> + return -EINVAL;
> + }
> +
> + host->priv = priv;
> +
> + return 0;
> +}
> +
> +struct dm_mmc_ops ca_dwmci_dm_ops;
> +
> +static int ca_dwmmc_probe(struct udevice *dev)
> +{
> + struct ca_mmc_plat *plat = dev_get_platdata(dev);
> + struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
> + struct ca_dwmmc_priv_data *priv = dev_get_priv(dev);
> + struct dwmci_host *host = &priv->host;
> +
> + memcpy(&ca_dwmci_dm_ops, &dm_dwmci_ops, sizeof(struct dm_mmc_ops));
> +
> + dwmci_setup_cfg(&plat->cfg, host, host->bus_hz, MIN_FREQ);
> + if (host->buswidth == 1) {
> + (&plat->cfg)->host_caps &= ~MMC_MODE_8BIT;
> + (&plat->cfg)->host_caps &= ~MMC_MODE_4BIT;
> + }
> +
> + host->mmc = &plat->mmc;
> + host->mmc->priv = &priv->host;
> + upriv->mmc = host->mmc;
> + host->mmc->dev = dev;
> + host->clksel = ca_dwmci_clksel;
> + host->board_init = ca_dwmci_board_init;
> + host->get_mmc_clk = ca_dwmci_get_mmc_clock;
> +
> + return dwmci_probe(dev);
> +}
> +
> +static int ca_dwmmc_bind(struct udevice *dev)
> +{
> + struct ca_mmc_plat *plat = dev_get_platdata(dev);
> +
> + return dwmci_bind(dev, &plat->mmc, &plat->cfg);
> +}
> +
> +static const struct udevice_id ca_dwmmc_ids[] = {
> + { .compatible = "snps,dw-cortina" },
> + { }
> +};
> +
> +U_BOOT_DRIVER(ca_dwmmc_drv) = {
> + .name = "cortina_dwmmc",
> + .id = UCLASS_MMC,
> + .of_match = ca_dwmmc_ids,
> + .ofdata_to_platdata = ca_dwmmc_ofdata_to_platdata,
> + .bind = ca_dwmmc_bind,
> + .ops = &ca_dwmci_dm_ops,
> + .probe = ca_dwmmc_probe,
> + .priv_auto_alloc_size = sizeof(struct ca_dwmmc_priv_data),
> + .platdata_auto_alloc_size = sizeof(struct ca_mmc_plat),
> +};
>
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