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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 <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 -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) || 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];
- 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;
- }
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