EXYNOS: mmc: support DesignWare Controller for Samsung-SoC

Support DesignWare MMC Controller for Samsung Specific.

Signed-off-by Jaehoon Chung <[email protected]>

Signed-off-by Kyungmin Park <[email protected]>

Signed-off-by Rajeshawari Shinde <[email protected]>

---
Changelog V3:
- Removed the unnecessary code.
Changelog V2:
- Nothing

---
 arch/arm/include/asm/arch-exynos/dwmmc.h |   36 +++++++++++++++++++
 drivers/mmc/Makefile                     |    1 +
 drivers/mmc/exynos_dw_mmc.c              |   57 ++++++++++++++++++++++++++++++
 3 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

arch/arm/include/asm/arch-exynos/dwmmc.h new file +36 -0

new file mode 100644
index 0000000..8acdf9b
@@ -0,0 +1,36 @@
+/*
+ * (C) Copyright 2012 SAMSUNG Electronics
+ * Jaehoon Chung <[email protected]>
+ *
+ * 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);
+}

drivers/mmc/Makefile +1 -0

index 9ef82a6..cb7c7f6 100644
@@ -48,6 +48,7 @@ COBJS-$(CONFIG_S5P_SDHCI) += s5p_sdhci.o
 COBJS-$(CONFIG_SH_MMCIF) += sh_mmcif.o
 COBJS-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
 COBJS-$(CONFIG_DWMMC) += dw_mmc.o
+COBJS-$(CONFIG_EXYNOS_DWMMC) += exynos_dw_mmc.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)

drivers/mmc/exynos_dw_mmc.c new file +57 -0

new file mode 100644
index 0000000..72a31b7
@@ -0,0 +1,57 @@
+/*
+ * (C) Copyright 2012 SAMSUNG Electronics
+ * Jaehoon Chung <[email protected]>
+ *
+ * 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;
+}
+

Dear, Mr.Kang

Could you merge this patch?
This patch is samsung specific file.
DesignWare controller has merged at u-boot-mmc repository. If Mr.Kang can't merge this, could Andy merge this?

Dear Jaehoon and Andy,

Quoted 7 lines · Jaehoon Chung

Dear, Mr.Kang

Could you merge this patch?
This patch is samsung specific file.
DesignWare controller has merged at u-boot-mmc repository. If Mr.Kang can't merge this, could Andy merge this?

This patch have dependency of dw-mmc patch. (because of Makefile) It should be merged to Andy's tree.

Andy,
I've delegate this patch to you.
http://patchwork.ozlabs.org/patch/191723/
Please check.

Thanks.
Minkyu Kang.

Dear Andy,

Do you have any opinion about this patch?
If you didn't have any others, could you apply this patch at u-boot-mmc repository?

Best Regards,
Jaehoon Chung

Quoted 20 lines · Minkyu Kang

Dear Jaehoon and Andy,

Quoted 6 lines · Jaehoon Chung

Dear, Mr.Kang

Could you merge this patch?
This patch is samsung specific file.
DesignWare controller has merged at u-boot-mmc repository. If Mr.Kang can't merge this, could Andy merge this?

This patch have dependency of dw-mmc patch. (because of Makefile) It should be merged to Andy's tree.

Andy,
I've delegate this patch to you.
http://patchwork.ozlabs.org/patch/191723/
Please check.

Thanks.
Minkyu Kang.