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Diffstat (limited to 'arch/arm/mach-rockchip/misc.c')
-rw-r--r-- | arch/arm/mach-rockchip/misc.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/arch/arm/mach-rockchip/misc.c b/arch/arm/mach-rockchip/misc.c new file mode 100644 index 0000000000..fdb763cc53 --- /dev/null +++ b/arch/arm/mach-rockchip/misc.c @@ -0,0 +1,114 @@ +/* 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; +} |