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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2018 Stefan Roese <sr@denx.de>
*/
#include <common.h>
#include <dm.h>
#include <init.h>
#include <ram.h>
#include <wdt.h>
#include <asm/io.h>
#include <linux/io.h>
#include <linux/sizes.h>
#include "mt76xx.h"
#define STR_LEN 6
#ifdef CONFIG_BOOT_ROM
int mach_cpu_init(void)
{
ddr_calibrate();
return 0;
}
#endif
int dram_init(void)
{
gd->ram_size = get_ram_size((void *)CONFIG_SYS_SDRAM_BASE, SZ_256M);
return 0;
}
int print_cpuinfo(void)
{
static const char * const boot_str[] = { "PLL (3-Byte SPI Addr)",
"PLL (4-Byte SPI Addr)",
"XTAL (3-Byte SPI Addr)",
"XTAL (4-Byte SPI Addr)" };
const void *blob = gd->fdt_blob;
void __iomem *sysc_base;
char buf[STR_LEN + 1];
fdt_addr_t base;
fdt_size_t size;
char *str;
int node;
u32 val;
/* Get system controller base address */
node = fdt_node_offset_by_compatible(blob, -1, "ralink,mt7620a-sysc");
if (node < 0)
return -FDT_ERR_NOTFOUND;
base = fdtdec_get_addr_size_auto_noparent(blob, node, "reg",
0, &size, true);
if (base == FDT_ADDR_T_NONE)
return -EINVAL;
sysc_base = ioremap_nocache(base, size);
str = (char *)sysc_base + MT76XX_CHIPID_OFFS;
snprintf(buf, STR_LEN + 1, "%s", str);
val = readl(sysc_base + MT76XX_CHIP_REV_ID_OFFS);
printf("CPU: %-*s Rev %ld.%ld - ", STR_LEN, buf,
(val & GENMASK(11, 8)) >> 8, val & GENMASK(3, 0));
val = (readl(sysc_base + MT76XX_SYSCFG0_OFFS) & GENMASK(3, 1)) >> 1;
printf("Boot from %s\n", boot_str[val]);
return 0;
}
int last_stage_init(void)
{
void *src, *dst;
src = malloc(SZ_64K);
dst = malloc(SZ_64K);
if (!src || !dst) {
printf("Can't allocate buffer for cache cleanup copy!\n");
return 0;
}
/*
* It has been noticed, that sometimes the d-cache is not in a
* "clean-state" when U-Boot is running on MT7688. This was
* detected when using the ethernet driver (which uses d-cache)
* and a TFTP command does not complete. Copying an area of 64KiB
* in DDR at a very late bootup time in U-Boot, directly before
* calling into the prompt, seems to fix this issue.
*/
memcpy(dst, src, SZ_64K);
free(src);
free(dst);
return 0;
}
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