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https://github.com/brain-hackers/u-boot-brain
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d490fadc70
rockchip_setup_macaddr() runs from an initcall, so returning an error
code will make that initcall fail thus breaking the boot process.
And if an ethernet address is already set this is definitly not a
cause for that, so just return success in that case.
Fixes: 0482538499 ("rockchip: rk3399: derive ethaddr from cpuid");
Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* RK3399: Architecture common definitions
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*
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* Copyright (C) 2019 Collabora Inc - https://www.collabora.com/
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* Rohan Garg <rohan.garg@collabora.com>
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*
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* Based on puma-rk3399.c:
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* (C) Copyright 2017 Theobroma Systems Design und Consulting GmbH
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*/
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#include <common.h>
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#include <env.h>
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#include <dm.h>
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#include <dm/uclass-internal.h>
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#include <misc.h>
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#include <u-boot/crc.h>
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#include <u-boot/sha256.h>
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#include <asm/arch-rockchip/misc.h>
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int rockchip_setup_macaddr(void)
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{
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#if CONFIG_IS_ENABLED(CMD_NET)
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int ret;
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const char *cpuid = env_get("cpuid#");
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u8 hash[SHA256_SUM_LEN];
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int size = sizeof(hash);
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u8 mac_addr[6];
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/* Only generate a MAC address, if none is set in the environment */
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if (env_get("ethaddr"))
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return 0;
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if (!cpuid) {
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debug("%s: could not retrieve 'cpuid#'\n", __func__);
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return -1;
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}
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ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size);
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if (ret) {
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debug("%s: failed to calculate SHA256\n", __func__);
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return -1;
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}
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/* Copy 6 bytes of the hash to base the MAC address on */
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memcpy(mac_addr, hash, 6);
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/* Make this a valid MAC address and set it */
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mac_addr[0] &= 0xfe; /* clear multicast bit */
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mac_addr[0] |= 0x02; /* set local assignment bit (IEEE802) */
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eth_env_set_enetaddr("ethaddr", mac_addr);
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#endif
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return 0;
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}
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int rockchip_cpuid_from_efuse(const u32 cpuid_offset,
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const u32 cpuid_length,
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u8 *cpuid)
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{
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#if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE) || CONFIG_IS_ENABLED(ROCKCHIP_OTP)
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struct udevice *dev;
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int ret;
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/* retrieve the device */
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#if CONFIG_IS_ENABLED(ROCKCHIP_EFUSE)
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ret = uclass_get_device_by_driver(UCLASS_MISC,
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DM_GET_DRIVER(rockchip_efuse), &dev);
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#elif CONFIG_IS_ENABLED(ROCKCHIP_OTP)
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ret = uclass_get_device_by_driver(UCLASS_MISC,
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DM_GET_DRIVER(rockchip_otp), &dev);
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#endif
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if (ret) {
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debug("%s: could not find efuse device\n", __func__);
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return -1;
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}
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/* read the cpu_id range from the efuses */
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ret = misc_read(dev, cpuid_offset, cpuid, cpuid_length);
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if (ret) {
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debug("%s: reading cpuid from the efuses failed\n",
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__func__);
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return -1;
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}
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#endif
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return 0;
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}
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int rockchip_cpuid_set(const u8 *cpuid, const u32 cpuid_length)
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{
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u8 low[cpuid_length / 2], high[cpuid_length / 2];
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char cpuid_str[cpuid_length * 2 + 1];
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u64 serialno;
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char serialno_str[17];
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int i;
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memset(cpuid_str, 0, sizeof(cpuid_str));
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for (i = 0; i < 16; i++)
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sprintf(&cpuid_str[i * 2], "%02x", cpuid[i]);
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debug("cpuid: %s\n", cpuid_str);
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/*
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* Mix the cpuid bytes using the same rules as in
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* ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c
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*/
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for (i = 0; i < 8; i++) {
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low[i] = cpuid[1 + (i << 1)];
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high[i] = cpuid[i << 1];
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}
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serialno = crc32_no_comp(0, low, 8);
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serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32;
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snprintf(serialno_str, sizeof(serialno_str), "%016llx", serialno);
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env_set("cpuid#", cpuid_str);
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env_set("serial#", serialno_str);
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return 0;
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}
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