| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * (C) Copyright 2012 Henrik Nordstrom <henrik@henriknordstrom.net> |
| * |
| * (C) Copyright 2007-2011 |
| * Allwinner Technology Co., Ltd. <www.allwinnertech.com> |
| * Tom Cubie <tangliang@allwinnertech.com> |
| * |
| * SRAM init for older sunxi SoCs. |
| */ |
| |
| #include <common.h> |
| #include <init.h> |
| #include <asm/io.h> |
| |
| void sunxi_sram_init(void) |
| { |
| /* |
| * Undocumented magic taken from boot0, without this DRAM |
| * access gets messed up (seems cache related). |
| * The boot0 sources describe this as: "config ema for cache sram" |
| * Newer SoCs (A83T, H3 and anything beyond) don't need this anymore. |
| */ |
| if (IS_ENABLED(CONFIG_MACH_SUN6I)) |
| setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0x1800); |
| |
| if (IS_ENABLED(CONFIG_MACH_SUN8I)) { |
| uint version = sunxi_get_sram_id(); |
| |
| if (IS_ENABLED(CONFIG_MACH_SUN8I_A23)) { |
| if (version == 0x1650) |
| setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0x1800); |
| else /* 0x1661 ? */ |
| setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0xc0); |
| } else if (IS_ENABLED(CONFIG_MACH_SUN8I_A33)) { |
| if (version != 0x1667) |
| setbits_le32(SUNXI_SRAMC_BASE + 0x44, 0xc0); |
| } |
| } |
| } |