EXYNOS: mmc: support DesignWare Controller for Samsung-SoC

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>

diff --git a/arch/arm/include/asm/arch-exynos/dwmmc.h b/arch/arm/include/asm/arch-exynos/dwmmc.h
new file mode 100644 (file)
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@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/Makefile b/drivers/mmc/Makefile
index a1dd7302bfc732122fe6620ded02b46dd8c817fd..65791aa218449039439faf578ca0d4e899680f7b 100644 (file)
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -47,6 +47,7 @@ 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)

diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c
new file mode 100644 (file)
index 0000000..72a31b7
--- /dev/null
+++ b/drivers/mmc/exynos_dw_mmc.c
@@ -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;
+}
+