mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-17 00:33:06 +00:00
41 lines
1.1 KiB
C
41 lines
1.1 KiB
C
|
// 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);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|