// SPDX-License-Identifier: GPL-2.0-only
/*
 * PlanetCore configuration data support functions
 *
 * Author: Scott Wood <scottwood@freescale.com>
 *
 * Copyright (c) 2007 Freescale Semiconductor, Inc.
 */

#include "stdio.h"
#include "stdlib.h"
#include "ops.h"
#include "planetcore.h"
#include "io.h"

/* PlanetCore passes information to the OS in the form of
 * a table of key=value strings, separated by newlines.
 *
 * The list is terminated by an empty string (i.e. two
 * consecutive newlines).
 *
 * To make it easier to parse, we first convert all the
 * newlines into null bytes.
 */

void planetcore_prepare_table(char *table)
{
        do {
                if (*table == '\n')
                        *table = 0;

                table++;
        } while (*(table - 1) || *table != '\n');

        *table = 0;
}

const char *planetcore_get_key(const char *table, const char *key)
{
        int keylen = strlen(key);

        do {
                if (!strncmp(table, key, keylen) && table[keylen] == '=')
                        return table + keylen + 1;

                table += strlen(table) + 1;
        } while (strlen(table) != 0);

        return NULL;
}

int planetcore_get_decimal(const char *table, const char *key, u64 *val)
{
        const char *str = planetcore_get_key(table, key);
        if (!str)
                return 0;

        *val = strtoull(str, NULL, 10);
        return 1;
}

int planetcore_get_hex(const char *table, const char *key, u64 *val)
{
        const char *str = planetcore_get_key(table, key);
        if (!str)
                return 0;

        *val = strtoull(str, NULL, 16);
        return 1;
}

static u64 mac_table[4] = {
        0x000000000000,
        0x000000800000,
        0x000000400000,
        0x000000c00000,
};

void planetcore_set_mac_addrs(const char *table)
{
        u8 addr[4][6];
        u64 int_addr;
        u32 i;
        int j;

        if (!planetcore_get_hex(table, PLANETCORE_KEY_MAC_ADDR, &int_addr))
                return;

        for (i = 0; i < 4; i++) {
                u64 this_dev_addr = (int_addr & ~0x000000c00000) |
                                    mac_table[i];

                for (j = 5; j >= 0; j--) {
                        addr[i][j] = this_dev_addr & 0xff;
                        this_dev_addr >>= 8;
                }

                dt_fixup_mac_address(i, addr[i]);
        }
}

static char prop_buf[MAX_PROP_LEN];

void planetcore_set_stdout_path(const char *table)
{
        char *path;
        const char *label;
        void *node, *chosen;

        label = planetcore_get_key(table, PLANETCORE_KEY_SERIAL_PORT);
        if (!label)
                return;

        node = find_node_by_prop_value_str(NULL, "linux,planetcore-label",
                                           label);
        if (!node)
                return;

        path = get_path(node, prop_buf, MAX_PROP_LEN);
        if (!path)
                return;

        chosen = finddevice("/chosen");
        if (!chosen)
                chosen = create_node(NULL, "chosen");
        if (!chosen)
                return;

        setprop_str(chosen, "linux,stdout-path", path);
}