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EXYNOS: mmc: support DesignWare Controller for Samsung-SoC

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Support DesignWare MMC Controller for Samsung Specific.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Rajeshawari Shinde <rajeshwari.s@samsung.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
This commit is contained in:
Jaehoon Chung
2012-10-15 19:10:31 +00:00
committed by Andy Fleming
parent 66dc452bfe
commit d0ebbb8dfa
3 changed files with 94 additions and 0 deletions
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36
arch/arm/include/asm/arch-exynos/dwmmc.h Normal file
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@@ -0,0 +1,36 @@
/*
* (C) Copyright 2012 SAMSUNG Electronics
* Jaehoon Chung <jh80.chung@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, 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, bus_width, index);
}

1
drivers/mmc/Makefile
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@@ -47,6 +47,7 @@ COBJS-$(CONFIG_S5P_SDHCI) += s5p_sdhci.o
COBJS-$(CONFIG_SH_MMCIF) += sh_mmcif.o COBJS-$(CONFIG_SH_MMCIF) += sh_mmcif.o
COBJS-$(CONFIG_TEGRA_MMC) += tegra_mmc.o COBJS-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
COBJS-$(CONFIG_DWMMC) += dw_mmc.o COBJS-$(CONFIG_DWMMC) += dw_mmc.o
COBJS-$(CONFIG_EXYNOS_DWMMC) += exynos_dw_mmc.o
COBJS := $(COBJS-y) COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c) SRCS := $(COBJS:.o=.c)

57
drivers/mmc/exynos_dw_mmc.c Normal file
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@@ -0,0 +1,57 @@
/*
* (C) Copyright 2012 SAMSUNG Electronics
* Jaehoon Chung <jh80.chung@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, int bus_width, int index)
{
struct dwmci_host *host = NULL;
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->buswidth = bus_width;
host->clksel = exynos_dwmci_clksel;
host->dev_index = index;
add_dwmci(host, 52000000, 400000);
return 0;
}