1 /* 2 * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <linux/io.h> 8 9 #include "../init.h" 10 #include "bcu-regs.h" 11 12 #define ch(x) ((x) >= 32 ? 0 : (x) < 0 ? 0x11111111 : 0x11111111 << (x)) 13 14 int uniphier_ld4_bcu_init(const struct uniphier_board_data *bd) 15 { 16 int shift; 17 18 writel(0x44444444, BCSCR0); /* 0x20000000-0x3fffffff: ASM bus */ 19 writel(0x11111111, BCSCR2); /* 0x80000000-0x9fffffff: IPPC/IPPD-bus */ 20 writel(0x11111111, BCSCR3); /* 0xa0000000-0xbfffffff: IPPC/IPPD-bus */ 21 writel(0x11111111, BCSCR4); /* 0xc0000000-0xdfffffff: IPPC/IPPD-bus */ 22 writel(0x11111111, BCSCR5); /* 0xe0000000-0Xffffffff: IPPC/IPPD-bus */ 23 24 /* Specify DDR channel */ 25 shift = (bd->dram_ch[1].base - bd->dram_ch[0].base) / 0x04000000 * 4; 26 writel(ch(shift), BCIPPCCHR2); /* 0x80000000-0x9fffffff */ 27 28 shift -= 32; 29 writel(ch(shift), BCIPPCCHR3); /* 0xa0000000-0xbfffffff */ 30 31 shift -= 32; 32 writel(ch(shift), BCIPPCCHR4); /* 0xc0000000-0xdfffffff */ 33 34 return 0; 35 } 36