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serial# is one of the vendor properties and thus protected from being overwritten if already set. If env_set is called anyway this result in some nasty warnings, so check for presence before trying that. In the same direction check for the presence of cpuid# and compare it to the actual hardware and emit a warning if they don't match. Signed-off-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com> Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
130 lines
3.2 KiB
C
130 lines
3.2 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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const char *oldid;
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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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oldid = env_get("cpuid#");
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if (oldid && strcmp(oldid, cpuid_str) != 0)
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printf("cpuid: value %s present in env does not match hardware %s\n",
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oldid, cpuid_str);
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env_set("cpuid#", cpuid_str);
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/* Only generate serial# when none is set yet */
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if (!env_get("serial#"))
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env_set("serial#", serialno_str);
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return 0;
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}
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