[U-Boot] [PATCH v2 3/4] EXYNOS: mmc: support DesignWare Controller for Samsung-SoC

[Jaehoon Chung]

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              |   58 ++++++++++++++++++++++++++++++
 2 files changed, 94 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..8acdf9b
--- /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, 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);
+}
diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c
new file mode 100644
index 0000000..286a7df
--- /dev/null
+++ b/drivers/mmc/exynos_dw_mmc.c
@@ -0,0 +1,58 @@
+/*
+ * (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, 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->buswidth = bus_width;
+	host->clksel = exynos_dwmci_clksel;
+	host->dev_index = index;
+	host->mmc_clk = get_mmc_clk;
+
+	add_dwmci(host, 52000000, 400000, index);
+
+	return 0;
+}
+