diff options
Diffstat (limited to 'arch/arm/mach-uniphier/bcu/bcu-ld4.c')
-rw-r--r-- | arch/arm/mach-uniphier/bcu/bcu-ld4.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/bcu/bcu-ld4.c b/arch/arm/mach-uniphier/bcu/bcu-ld4.c new file mode 100644 index 0000000..bbe8a74 --- /dev/null +++ b/arch/arm/mach-uniphier/bcu/bcu-ld4.c @@ -0,0 +1,35 @@ +/* + * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <linux/io.h> + +#include "../init.h" +#include "bcu-regs.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_ch[1].base - bd->dram_ch[0].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; +} |