Orange Pi5 kernel

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
 * Copyright (C) 2008 Florian Fainelli <florian@openwrt.org>
 * Copyright (C) 2012 Jonas Gorski <jonas.gorski@gmail.com>
 */
 
#define pr_fmt(fmt) "bcm63xx_nvram: " fmt
 
#include <linux/bcm963xx_nvram.h>
#include <linux/init.h>
#include <linux/crc32.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/if_ether.h>
 
#include <bcm63xx_nvram.h>
 
#define BCM63XX_DEFAULT_PSI_SIZE	64
 
static struct bcm963xx_nvram nvram;
static int mac_addr_used;
 
void __init bcm63xx_nvram_init(void *addr)
{
<------>u32 crc, expected_crc;
<------>u8 hcs_mac_addr[ETH_ALEN] = { 0x00, 0x10, 0x18, 0xff, 0xff, 0xff };
 
<------>/* extract nvram data */
<------>memcpy(&nvram, addr, BCM963XX_NVRAM_V5_SIZE);
 
<------>/* check checksum before using data */
<------>if (bcm963xx_nvram_checksum(&nvram, &expected_crc, &crc))
<------><------>pr_warn("nvram checksum failed, contents may be invalid (expected %08x, got %08x)\n",
<------><------><------>expected_crc, crc);
 
<------>/* Cable modems have a different NVRAM which is embedded in the eCos
<------> * firmware and not easily extractible, give at least a MAC address
<------> * pool.
<------> */
<------>if (BCMCPU_IS_3368()) {
<------><------>memcpy(nvram.mac_addr_base, hcs_mac_addr, ETH_ALEN);
<------><------>nvram.mac_addr_count = 2;
<------>}
}
 
u8 *bcm63xx_nvram_get_name(void)
{
<------>return nvram.name;
}
EXPORT_SYMBOL(bcm63xx_nvram_get_name);
 
int bcm63xx_nvram_get_mac_address(u8 *mac)
{
<------>u8 *oui;
<------>int count;
 
<------>if (mac_addr_used >= nvram.mac_addr_count) {
<------><------>pr_err("not enough mac addresses\n");
<------><------>return -ENODEV;
<------>}
 
<------>memcpy(mac, nvram.mac_addr_base, ETH_ALEN);
<------>oui = mac + ETH_ALEN/2 - 1;
<------>count = mac_addr_used;
 
<------>while (count--) {
<------><------>u8 *p = mac + ETH_ALEN - 1;
 
<------><------>do {
<------><------><------>(*p)++;
<------><------><------>if (*p != 0)
<------><------><------><------>break;
<------><------><------>p--;
<------><------>} while (p != oui);
 
<------><------>if (p == oui) {
<------><------><------>pr_err("unable to fetch mac address\n");
<------><------><------>return -ENODEV;
<------><------>}
<------>}
 
<------>mac_addr_used++;
<------>return 0;
}
EXPORT_SYMBOL(bcm63xx_nvram_get_mac_address);
 
int bcm63xx_nvram_get_psi_size(void)
{
<------>if (nvram.psi_size > 0)
<------><------>return nvram.psi_size;
 
<------>return BCM63XX_DEFAULT_PSI_SIZE;
}
EXPORT_SYMBOL(bcm63xx_nvram_get_psi_size);