1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * (C) Copyright 2012 Henrik Nordstrom <henrik@henriknordstrom.net>
4 *
5 * (C) Copyright 2007-2011
6 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
7 * Tom Cubie <tangliang@allwinnertech.com>
8 *
9 * SRAM init for older sunxi SoCs.
10 */
11
12#include <common.h>
13#include <init.h>
14#include <asm/io.h>
15#include <asm/arch/cpu.h>
16
17void sunxi_sram_init(void)
18{
19	/*
20	 * Undocumented magic taken from boot0, without this DRAM
21	 * access gets messed up (seems cache related).
22	 * The boot0 sources describe this as: "config ema for cache sram"
23	 * Newer SoCs (A83T, H3 and anything beyond) don't need this anymore.
24	 */
25	if (IS_ENABLED(CONFIG_MACH_SUN6I))
26		setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0x1800);
27
28	if (IS_ENABLED(CONFIG_MACH_SUN8I)) {
29		uint version = sunxi_get_sram_id();
30
31		if (IS_ENABLED(CONFIG_MACH_SUN8I_A23)) {
32			if (version == 0x1650)
33				setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0x1800);
34			else /* 0x1661 ? */
35				setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0xc0);
36		} else if (IS_ENABLED(CONFIG_MACH_SUN8I_A33)) {
37			if (version != 0x1667)
38				setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0xc0);
39		}
40	}
41}
42