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aspeed: Board init functions and common configs for ast2500 based boards

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Add configuration file with parameters that are very likely to be shared by
all ast2500-based boards.
Add ast2500-board.c file with the init code that is very likely to be
shared by all ast2500-based boards.
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
maxims@google.com
2017-01-18 13:44:57 -08:00
committed by Tom Rini
parent 14e4b14979
commit f6a6a9f049
3 changed files with 165 additions and 1 deletions
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2
arch/arm/mach-aspeed/Makefile
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@@ -5,4 +5,4 @@
#
obj-$(CONFIG_ARCH_ASPEED) += ast_wdt.o
obj-$(CONFIG_ASPEED_AST2500) += ast2500/
obj-$(CONFIG_ASPEED_AST2500) += ast2500/ ast2500-board.o

83
arch/arm/mach-aspeed/ast2500-board.c Normal file
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@@ -0,0 +1,83 @@
/*
* Copyright (c) 2016 Google, Inc
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <ram.h>
#include <timer.h>
#include <asm/io.h>
#include <asm/arch/timer.h>
#include <asm/arch/wdt.h>
#include <linux/err.h>
#include <dm/uclass.h>
/*
* Second Watchdog Timer by default is configured
* to trigger secondary boot source.
*/
#define AST_2ND_BOOT_WDT 1
/*
* Third Watchdog Timer by default is configured
* to toggle Flash address mode switch before reset.
*/
#define AST_FLASH_ADDR_DETECT_WDT 2
DECLARE_GLOBAL_DATA_PTR;
void lowlevel_init(void)
{
/*
* These two watchdogs need to be stopped as soon as possible,
* otherwise the board might hang. By default they are set to
* a very short timeout and even simple debug write to serial
* console early in the init process might cause them to fire.
*/
struct ast_wdt *flash_addr_wdt =
(struct ast_wdt *)(WDT_BASE +
sizeof(struct ast_wdt) *
AST_FLASH_ADDR_DETECT_WDT);
clrbits_le32(&flash_addr_wdt->ctrl, WDT_CTRL_EN);
#ifndef CONFIG_FIRMWARE_2ND_BOOT
struct ast_wdt *sec_boot_wdt =
(struct ast_wdt *)(WDT_BASE +
sizeof(struct ast_wdt) *
AST_2ND_BOOT_WDT);
clrbits_le32(&sec_boot_wdt->ctrl, WDT_CTRL_EN);
#endif
}
int board_init(void)
{
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
return 0;
}
int dram_init(void)
{
struct udevice *dev;
struct ram_info ram;
int ret;
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
if (ret) {
debug("DRAM FAIL1\r\n");
return ret;
}
ret = ram_get_info(dev, &ram);
if (ret) {
debug("DRAM FAIL2\r\n");
return ret;
}
gd->ram_size = ram.size;
return 0;
}