[U-Boot] [PATCH 2/2] EXYNOS: mmc: support DesignWare Controller for Samsung-SoC

[Rajeshwari Birje]

Hi Jaehoon Chung,


On Tue, Jul 3, 2012 at 10:27 AM, Jaehoon Chung <jh80.chung at samsung.com> wrote:
> Support DesignWare MMC Controller for Samsung Specific.
>
> Signed-off-by: Jaehoon Chung <jh80.chung at samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
> Signed-off-by: Rajeshawari Shinde <rajeshwari.s at samsung.com>
> ---
>  arch/arm/include/asm/arch-exynos/dwmmc.h |   36 ++++++++++++++++++
>  drivers/mmc/exynos_dw_mmc.c              |   60 ++++++++++++++++++++++++++++++
>  2 files changed, 96 insertions(+), 0 deletions(-)
>  create mode 100644 arch/arm/include/asm/arch-exynos/dwmmc.h
>  create mode 100644 drivers/mmc/exynos_dw_mmc.c
>
> diff --git a/arch/arm/include/asm/arch-exynos/dwmmc.h b/arch/arm/include/asm/arch-exynos/dwmmc.h
> new file mode 100644
> index 0000000..2e4354d
> --- /dev/null
> +++ b/arch/arm/include/asm/arch-exynos/dwmmc.h
> @@ -0,0 +1,36 @@
> +/*
> + * (C) Copyright 2012 SAMSUNG Electronics
> + * Jaehoon Chung <jh80.chung at samsung.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
> + *
> + */
> +
> +#define DWMCI_CLKSEL           0x09C
> +#define DWMCI_SHIFT_0          0x0
> +#define DWMCI_SHIFT_1          0x1
> +#define DWMCI_SHIFT_2          0x2
> +#define DWMCI_SHIFT_3          0x3
> +#define DWMCI_SET_SAMPLE_CLK(x)        (x)
> +#define DWMCI_SET_DRV_CLK(x)   ((x) << 16)
> +#define DWMCI_SET_DIV_RATIO(x) ((x) << 24)
> +
> +int exynos_dwmci_init(u32 regbase, u32 quirks, int bus_width, int index);
> +
> +static inline unsigned int exynos_dwmmc_init(int index, int bus_width)
> +{
> +       unsigned int base = samsung_get_base_mmc() + (0x10000 * index);
> +       return exynos_dwmci_init(base, 50000000, 400000, index);
We donot use bus_width here ?
> +}
> diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c
> new file mode 100644
> index 0000000..e9b0e1d
> --- /dev/null
> +++ b/drivers/mmc/exynos_dw_mmc.c
> @@ -0,0 +1,60 @@
> +/*
> + * (C) Copyright 2012 SAMSUNG Electronics
> + * Jaehoon Chung <jh80.chung at samsung.com>
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation; either version 2 of
> + * the License, or (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston,  MA 02111-1307 USA
> + *
> + */
> +
> +#include <common.h>
> +#include <malloc.h>
> +#include <dwmmc.h>
> +#include <asm/arch/dwmmc.h>
> +#include <asm/arch/clk.h>
> +
> +static char *EXYNOS_NAME = "EXYNOS DWMMC";
> +
> +static void exynos_dwmci_clksel(struct dwmci_host *host)
> +{
> +       u32 val;
> +       val = DWMCI_SET_SAMPLE_CLK(DWMCI_SHIFT_0) |
> +               DWMCI_SET_DRV_CLK(DWMCI_SHIFT_0) | DWMCI_SET_DIV_RATIO(0);
> +
> +       dwmci_writel(host, DWMCI_CLKSEL, val);
> +}
> +
> +int exynos_dwmci_init(u32 regbase, u32 quirks, int bus_width, int index)
> +{
> +       struct dwmci_host *host = NULL;
> +       host = (struct dwmci_host *)malloc(sizeof(struct dwmci_host));
> +       if (!host) {
> +               printf("dwmci_host malloc fail!\n");
> +               return 1;
> +       }
> +
> +       host->name = EXYNOS_NAME;
> +       host->ioaddr = (void *)regbase;
> +       host->quirks = quirks;
> +       host->buswidth = bus_width;
> +       host->fifoth_val = 0x20100010;
Can this hard coding be removed?
> +       host->clksel = exynos_dwmci_clksel;
> +       host->dev_index = index;
> +       host->get_mmc_clk = get_mmc_clk;
Can this be just mmc_clk, just a suggestion.
> +
> +       add_dwmci(host, 52000000, 400000, index);
> +
> +       return 0;
> +}
> +
> --
> 1.7.4.1
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