summaryrefslogtreecommitdiff
path: root/arch/arm/mach-uniphier/bcu/bcu-ph1-ld4.c
blob: e9d3761fde9921923bd7421f40857ea9d1d2ac96 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
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;
}