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// SPDX-License-Identifier: GPL-2.0-only
//
// Copyright (C) 2019 Socionext Inc.
// Author: Masahiro Yamada <yamada.masahiro@socionext.com>
#include <dm/of.h>
#include <fdt_support.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/libfdt.h>
#include <linux/sizes.h>
#include <asm/global_data.h>
#include "base-address.h"
#include "sc64-regs.h"
#include "sg-regs.h"
/*
* Dummy initializers are needed to allocate these to .data section instead of
* .bss section. The .bss section is unusable before relocation because the
* .bss section and DT share the same address. Without the initializers,
* DT would be broken.
*/
void __iomem *sc_base = (void *)0xdeadbeef;
void __iomem *sg_base = (void *)0xdeadbeef;
static u64 uniphier_base_address_get(const char *compat_tail)
{
DECLARE_GLOBAL_DATA_PTR;
const void *fdt = gd->fdt_blob;
int offset, len, i;
const char *str;
for (offset = fdt_next_node(fdt, 0, NULL);
offset >= 0;
offset = fdt_next_node(fdt, offset, NULL)) {
for (i = 0;
(str = fdt_stringlist_get(fdt, offset, "compatible", i, &len));
i++) {
if (!memcmp(compat_tail,
str + len - strlen(compat_tail),
strlen(compat_tail)))
return fdt_get_base_address(fdt, offset);
}
}
return OF_BAD_ADDR;
}
int uniphier_base_address_init(void)
{
u64 base;
base = uniphier_base_address_get("-soc-glue");
if (base == OF_BAD_ADDR)
return -EINVAL;
sg_base = ioremap(base, SZ_8K);
base = uniphier_base_address_get("-sysctrl");
if (base == OF_BAD_ADDR)
return -EINVAL;
sc_base = ioremap(base, SZ_64K);
return 0;
}
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