Some RK3399 boards, such as newer revisions of NanoPi R4S, do not provide an EEPROM chip containing a globally unique MAC address.
Currently, this means that a randomly generated temporary MAC address may be generated each time the device is rebooted, leading to ARP cache issues and other confusing bugs.
Since RK3399 CPUs provide a built-in unique serial number, we can reliably derive a locally MAC address from it by reading the corresponding bits from the non-secure efuse block.
Port from uboot-rockchip 0c294d0, fix compilation issues and adjust coding style.
rockchip: board: puma_rk3399: derive ethaddr from cpuid rockchip: board: puma_rk3399: add support for serial# and cpuid# rockchip: efuse: add (misc) driver for RK3399 non-secure efuse block via efuses
Signed-off-by: Christian Kohlschütter christian@kohlschutter.com --- board/rockchip/evb_rk3399/evb-rk3399.c | 120 +++++++++++++++++++++++++ configs/nanopi-r4s-rk3399_defconfig | 4 + drivers/misc/Makefile | 2 +- 3 files changed, 125 insertions(+), 1 deletion(-)
diff --git a/board/rockchip/evb_rk3399/evb-rk3399.c b/board/rockchip/evb_rk3399/evb-rk3399.c index abb76585cf..ab8738ccf3 100644 --- a/board/rockchip/evb_rk3399/evb-rk3399.c +++ b/board/rockchip/evb_rk3399/evb-rk3399.c @@ -5,11 +5,20 @@
#include <common.h> #include <dm.h> +#include <misc.h> +#include <env.h> +#include <u-boot/crc.h> +#include <hash.h> #include <init.h> #include <log.h> #include <asm/arch-rockchip/periph.h> +#include <asm/setup.h> +#include <u-boot/sha256.h> #include <power/regulator.h>
+#define RK3399_CPUID_OFF 0x7 +#define RK3399_CPUID_LEN 0x10 + #ifndef CONFIG_SPL_BUILD int board_early_init_f(void) { @@ -30,3 +39,114 @@ out: return 0; } #endif +static void setup_macaddr(void) +{ + if (!IS_ENABLED(CONFIG_CMD_NET)) + return; + + 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; + + if (!cpuid) { + debug("%s: could not retrieve 'cpuid#'\n", __func__); + return; + } + + ret = hash_block("sha256", (void *)cpuid, strlen(cpuid), hash, &size); + if (ret) { + debug("%s: failed to calculate SHA256\n", __func__); + return; + } + + /* 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); +} + +static void setup_serial(void) +{ + if (!IS_ENABLED(CONFIG_ROCKCHIP_EFUSE)) + return; + + struct udevice *dev; + int ret, i; + u8 cpuid[RK3399_CPUID_LEN]; + u8 low[RK3399_CPUID_LEN / 2], high[RK3399_CPUID_LEN / 2]; + char cpuid_str[RK3399_CPUID_LEN * 2 + 1]; + u64 serialno; + char serialno_str[16]; + + /* retrieve the device */ + ret = uclass_get_device_by_driver(UCLASS_MISC, + DM_DRIVER_GET(rockchip_efuse), &dev); + if (ret) { + debug("%s: could not find efuse device\n", __func__); + return; + } + + /* read the cpu_id range from the efuses */ + ret = misc_read(dev, RK3399_CPUID_OFF, &cpuid, sizeof(cpuid)); + if (ret) { + debug("%s: reading cpuid from the efuses failed\n", + __func__); + return; + } + + 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 + * ${linux}/drivers/soc/rockchip/rockchip-cpuinfo.c + */ + for (i = 0; i < 8; i++) { + low[i] = cpuid[1 + (i << 1)]; + high[i] = cpuid[i << 1]; + } + + serialno = crc32_no_comp(0, low, 8); + serialno |= (u64)crc32_no_comp(serialno, high, 8) << 32; + snprintf(serialno_str, sizeof(serialno_str), "%llx", serialno); + + env_set("cpuid#", cpuid_str); + env_set("serial#", serialno_str); +} + +int misc_init_r(void) +{ + setup_serial(); + setup_macaddr(); + + return 0; +} + +void get_board_serial(struct tag_serialnr *serialnr) +{ + u64 serial = 0; + + if (IS_ENABLED(CONFIG_SERIAL_TAG)) { + char *serial_string; + + serial_string = env_get("serial#"); + + if (serial_string) + serial = simple_strtoull(serial_string, NULL, 16); + } + + serialnr->high = (u32)(serial >> 32); + serialnr->low = (u32)(serial & 0xffffffff); +} diff --git a/configs/nanopi-r4s-rk3399_defconfig b/configs/nanopi-r4s-rk3399_defconfig index 46ba07f4d5..aa89ac5854 100644 --- a/configs/nanopi-r4s-rk3399_defconfig +++ b/configs/nanopi-r4s-rk3399_defconfig @@ -63,3 +63,7 @@ CONFIG_VIDEO_ROCKCHIP=y CONFIG_DISPLAY_ROCKCHIP_HDMI=y CONFIG_SPL_TINY_MEMSET=y CONFIG_ERRNO_STR=y +CONFIG_MISC=y +CONFIG_MISC_INIT_R=y +CONFIG_ROCKCHIP_EFUSE=y +CONFIG_ROCKCHIP_OTP=y diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index b9c54bdd99..a2ce9e737c 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -64,7 +64,7 @@ obj-$(CONFIG_QFW_PIO) += qfw_pio.o obj-$(CONFIG_QFW_MMIO) += qfw_mmio.o obj-$(CONFIG_SANDBOX) += qfw_sandbox.o endif -obj-$(CONFIG_ROCKCHIP_EFUSE) += rockchip-efuse.o +obj-$(CONFIG_ROCKCHIP_EFUSE) += rockchip-efuse.o misc-uclass.o obj-$(CONFIG_ROCKCHIP_OTP) += rockchip-otp.o obj-$(CONFIG_SANDBOX) += syscon_sandbox.o misc_sandbox.o obj-$(CONFIG_SIFIVE_OTP) += sifive-otp.o