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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* RK3399: Architecture common definitions
*
* Copyright (C) 2019 Collabora Inc - https://www.collabora.com/
* Rohan Garg <rohan.garg@collabora.com>
*
* Based on puma-rk3399.c:
* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
*/
#include <common.h>
#include <env.h>
#include <dm.h>
#include <hash.h>
#include <log.h>
#include <dm/uclass-internal.h>
#include <misc.h>
#include <u-boot/crc.h>
#include <u-boot/sha256.h>
#include <asm/arch-rockchip/misc.h>
int rockchip_setup_macaddr(void)
{
#if CONFIG_IS_ENABLED(CMD_NET)
int ret;
const char *cpuid = env_get("cpuid#");
u8 hash[SHA256_SUM_LEN];
int size = sizeof(hash);
u8 mac_addr[6];
/* Only generate a MAC address, if none is set in the environment */
if (env_get("ethaddr"))
return 0;
if (!cpuid) {
debug("%s: could not retrieve 'cpuid#'\n", __func__);
return -1;
}
ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
if (ret) {
debug("%s: failed to calculate SHA256\n", __func__);
return -1;
}
/* Copy 6 bytes of the hash to base the MAC address on */
memcpy(mac_addr, hash, 6);
/* Make this a valid MAC address and set it */
mac_addr[0] &= 0xfe; /* clear multicast bit */
mac_addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
eth_env_set_enetaddr("ethaddr", mac_addr);
#endif
return 0;
}
int rockchip_cpuid_from_efuse(const u32 cpuid_offset,
const u32 cpuid_length,
u8 *cpuid)
{
#if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE) || CONFIG_IS_ENABLED(ROCKCHIP_OTP)
struct udevice *dev;
int ret;
/* retrieve the device */
#if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(rockchip_efuse), &dev);
#elif CONFIG_IS_ENABLED(ROCKCHIP_OTP)
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(rockchip_otp), &dev);
#endif
if (ret) {
debug("%s: could not find efuse device\n", __func__);
return -1;
}
/* read the cpu_id range from the efuses */
ret = misc_read(dev, cpuid_offset, cpuid, cpuid_length);
if (ret) {
debug("%s: reading cpuid from the efuses failed\n",
__func__);
return -1;
}
#endif
return 0;
}
int rockchip_cpuid_set(const u8 *cpuid, const u32 cpuid_length)
{
u8 low[cpuid_length / 2], high[cpuid_length / 2];
char cpuid_str[cpuid_length * 2 + 1];
u64 serialno;
char serialno_str[17];
const char *oldid;
int i;
memset(cpuid_str, 0, sizeof(cpuid_str));
for (i = 0; i < 16; i++)
sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
debug("cpuid: %s\n", cpuid_str);
/*
* Mix the cpuid bytes using the same rules as in
* ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
*/
for (i = 0; i < 8; i++) {
low[i] = cpuid[1 + (i << 1)];
high[i] = cpuid[i << 1];
}
serialno = crc32_no_comp(0, low, 8);
serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
snprintf(serialno_str, sizeof(serialno_str), "%016llx", serialno);
oldid = env_get("cpuid#");
if (oldid && strcmp(oldid, cpuid_str) != 0)
printf("cpuid: value %s present in env does not match hardware %s\n",
oldid, cpuid_str);
env_set("cpuid#", cpuid_str);
/* Only generate serial# when none is set yet */
if (!env_get("serial#"))
env_set("serial#", serialno_str);
return 0;
}
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