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// SPDX-License-Identifier: GPL-2.0
/*
* board/renesas/rcar-common/common.c
*
* Copyright (C) 2013 Renesas Electronics Corporation
* Copyright (C) 2013 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
* Copyright (C) 2015 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
*/
#include <common.h>
#include <dm.h>
#include <fdt_support.h>
#include <init.h>
#include <asm/global_data.h>
#include <dm/uclass-internal.h>
#include <asm/arch/rmobile.h>
#include <linux/libfdt.h>
#ifdef CONFIG_RCAR_64
DECLARE_GLOBAL_DATA_PTR;
/* If the firmware passed a device tree use it for e.g. U-Boot DRAM setup. */
extern u64 rcar_atf_boot_args[];
#define FDT_RPC_PATH "/soc/spi@ee200000"
static void apply_atf_overlay(void *fdt_blob)
{
void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]);
if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
fdt_overlay_apply_node(fdt_blob, 0, atf_fdt_blob, 0);
}
int fdtdec_board_setup(const void *fdt_blob)
{
apply_atf_overlay((void *)fdt_blob);
return 0;
}
int dram_init(void)
{
return fdtdec_setup_mem_size_base();
}
int dram_init_banksize(void)
{
fdtdec_setup_memory_banksize();
return 0;
}
#if defined(CONFIG_OF_BOARD_SETUP)
static int is_mem_overlap(void *blob, int first_mem_node, int curr_mem_node)
{
struct fdt_resource first_mem_res, curr_mem_res;
int curr_mem_reg, first_mem_reg = 0;
int ret;
for (;;) {
ret = fdt_get_resource(blob, first_mem_node, "reg",
first_mem_reg++, &first_mem_res);
if (ret) /* No more entries, no overlap found */
return 0;
curr_mem_reg = 0;
for (;;) {
ret = fdt_get_resource(blob, curr_mem_node, "reg",
curr_mem_reg++, &curr_mem_res);
if (ret) /* No more entries, check next tuple */
break;
if (curr_mem_res.end < first_mem_res.start)
continue;
if (curr_mem_res.start >= first_mem_res.end)
continue;
log_debug("Overlap found: 0x%llx..0x%llx / 0x%llx..0x%llx\n",
first_mem_res.start, first_mem_res.end,
curr_mem_res.start, curr_mem_res.end);
return 1;
}
}
return 0;
}
static void scrub_duplicate_memory(void *blob)
{
/*
* Scrub duplicate /memory@* node entries here. Some R-Car DTs might
* contain multiple /memory@* nodes, however fdt_fixup_memory_banks()
* either generates single /memory node or updates the first /memory
* node. Any remaining memory nodes are thus potential duplicates.
*
* However, it is not possible to delete all the memory nodes right
* away, since some of those might not be DRAM memory nodes, but some
* sort of other memory. Thus, delete only the memory nodes which are
* in the R-Car3 DBSC ranges.
*/
int mem = 0, first_mem_node = 0;
for (;;) {
mem = fdt_node_offset_by_prop_value(blob, mem,
"device_type", "memory", 7);
if (mem < 0)
break;
if (!fdtdec_get_is_enabled(blob, mem))
continue;
/* First memory node, patched by U-Boot */
if (!first_mem_node) {
first_mem_node = mem;
continue;
}
/* Check the remaining nodes and delete duplicates */
if (!is_mem_overlap(blob, first_mem_node, mem))
continue;
/* Delete duplicate node, start again */
fdt_del_node(blob, mem);
first_mem_node = 0;
mem = 0;
}
}
static void update_rpc_status(void *blob)
{
void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]);
int offset, enabled;
/*
* Check if the DT fragment received from TF-A had its RPC-IF device node
* enabled.
*/
if (fdt_magic(atf_fdt_blob) != FDT_MAGIC)
return;
offset = fdt_path_offset(atf_fdt_blob, FDT_RPC_PATH);
if (offset < 0)
return;
enabled = fdtdec_get_is_enabled(atf_fdt_blob, offset);
if (!enabled)
return;
/*
* Find the RPC-IF device node, and enable it if it has a flash subnode.
*/
offset = fdt_path_offset(blob, FDT_RPC_PATH);
if (offset < 0)
return;
if (fdt_subnode_offset(blob, offset, "flash") < 0)
return;
fdt_status_okay(blob, offset);
}
int ft_board_setup(void *blob, struct bd_info *bd)
{
apply_atf_overlay(blob);
scrub_duplicate_memory(blob);
update_rpc_status(blob);
return 0;
}
#endif
#endif
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