1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/bcu/bcu-ph1-ld4.c b/arch/arm/mach-uniphier/bcu/bcu-ph1-ld4.c
new file mode 100644
index 0000000000..e9d3761fde
--- /dev/null
+++ b/arch/arm/mach-uniphier/bcu/bcu-ph1-ld4.c
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <linux/io.h>
+#include <mach/bcu-regs.h>
+#include <mach/init.h>
+
+#define ch(x) ((x) >= 32 ? 0 : (x) < 0 ? 0x11111111 : 0x11111111 << (x))
+
+int ph1_ld4_bcu_init(const struct uniphier_board_data *bd)
+{
+	int shift;
+
+	writel(0x44444444, BCSCR0); /* 0x20000000-0x3fffffff: ASM bus */
+	writel(0x11111111, BCSCR2); /* 0x80000000-0x9fffffff: IPPC/IPPD-bus */
+	writel(0x11111111, BCSCR3); /* 0xa0000000-0xbfffffff: IPPC/IPPD-bus */
+	writel(0x11111111, BCSCR4); /* 0xc0000000-0xdfffffff: IPPC/IPPD-bus */
+	writel(0x11111111, BCSCR5); /* 0xe0000000-0Xffffffff: IPPC/IPPD-bus */
+
+	/* Specify DDR channel */
+	shift = (bd->dram_ch1_base - bd->dram_ch0_base) / 0x04000000 * 4;
+	writel(ch(shift), BCIPPCCHR2); /* 0x80000000-0x9fffffff */
+
+	shift -= 32;
+	writel(ch(shift), BCIPPCCHR3); /* 0xa0000000-0xbfffffff */
+
+	shift -= 32;
+	writel(ch(shift), BCIPPCCHR4); /* 0xc0000000-0xdfffffff */
+
+	return 0;
+}