Commit 04825384 authored by Rohan Garg's avatar Rohan Garg Committed by Kever Yang

rockchip: rk3399: derive ethaddr from cpuid

Generate a MAC address based on the cpuid available in the efuse
block: Use the first 6 byte of the cpuid's SHA256 hash and set the
locally administered bits. Also ensure that the multicast bit is
cleared.

The MAC address is only generated and set if there is no ethaddr
present in the saved environment.

This is based off of Klaus Goger's work in 8adc9d
Signed-off-by: default avatarRohan Garg <rohan.garg@collabora.com>
Reviewed-by: Kever Yang's avatarKever Yang <kever.yang@rock-chips.com>
parent cb8c492f
/* 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>
*/
int rockchip_cpuid_from_efuse(const u32 cpuid_offset,
const u32 cpuid_length,
u8 *cpuid);
int rockchip_cpuid_set(const u8 *cpuid, const u32 cpuid_length);
int rockchip_setup_macaddr(void);
......@@ -25,6 +25,10 @@ endif
obj-$(CONFIG_$(SPL_TPL_)RAM) += sdram_common.o
ifdef CONFIG_MISC_INIT_R
obj-y += misc.o
endif
obj-$(CONFIG_ROCKCHIP_RK3036) += rk3036/
obj-$(CONFIG_ROCKCHIP_RK3128) += rk3128/
ifndef CONFIG_TPL_BUILD
......
......@@ -11,6 +11,7 @@
#include <asm/arch-rockchip/boot_mode.h>
#include <asm/arch-rockchip/clock.h>
#include <asm/arch-rockchip/periph.h>
#include <asm/arch-rockchip/misc.h>
#include <power/regulator.h>
DECLARE_GLOBAL_DATA_PTR;
......@@ -102,3 +103,25 @@ int fastboot_set_reboot_flag(void)
return 0;
}
#endif
#ifdef CONFIG_MISC_INIT_R
__weak int misc_init_r(void)
{
const u32 cpuid_offset = 0x7;
const u32 cpuid_length = 0x10;
u8 cpuid[cpuid_length];
int ret;
ret = rockchip_cpuid_from_efuse(cpuid_offset, cpuid_length, cpuid);
if (ret)
return ret;
ret = rockchip_cpuid_set(cpuid, cpuid_length);
if (ret)
return ret;
ret = rockchip_setup_macaddr();
return ret;
}
#endif
/* 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 <dm/uclass-internal.h>
#include <misc.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 -1;
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)
struct udevice *dev;
int ret;
/* retrieve the device */
ret = uclass_get_device_by_driver(UCLASS_MISC,
DM_GET_DRIVER(rockchip_efuse), &dev);
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, sizeof(cpuid));
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];
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);
env_set("cpuid#", cpuid_str);
env_set("serial#", serialno_str);
return 0;
}
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment