1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright (C) 2011-2014 Panasonic Corporation
4  * Copyright (C) 2015-2016 Socionext Inc.
5  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
6  */
7 
8 #include <linux/io.h>
9 
10 #include "../init.h"
11 #include "bcu-regs.h"
12 
13 #define ch(x) ((x) >= 32 ? 0 : (x) < 0 ? 0x11111111 : 0x11111111 << (x))
14 
uniphier_ld4_bcu_init(const struct uniphier_board_data * bd)15 void uniphier_ld4_bcu_init(const struct uniphier_board_data *bd)
16 {
17 	int shift;
18 
19 	writel(0x44444444, BCSCR0); /* 0x20000000-0x3fffffff: ASM bus */
20 	writel(0x11111111, BCSCR2); /* 0x80000000-0x9fffffff: IPPC/IPPD-bus */
21 	writel(0x11111111, BCSCR3); /* 0xa0000000-0xbfffffff: IPPC/IPPD-bus */
22 	writel(0x11111111, BCSCR4); /* 0xc0000000-0xdfffffff: IPPC/IPPD-bus */
23 	writel(0x11111111, BCSCR5); /* 0xe0000000-0Xffffffff: IPPC/IPPD-bus */
24 
25 	/* Specify DDR channel */
26 	shift = bd->dram_ch[0].size / 0x04000000 * 4;
27 	writel(ch(shift), BCIPPCCHR2); /* 0x80000000-0x9fffffff */
28 
29 	shift -= 32;
30 	writel(ch(shift), BCIPPCCHR3); /* 0xa0000000-0xbfffffff */
31 
32 	shift -= 32;
33 	writel(ch(shift), BCIPPCCHR4); /* 0xc0000000-0xdfffffff */
34 }
35