Implement checkboard() to print current SoC model used by a board, e.g. one of:
SoC: RK3582 v1 SoC: RK3588 v0 SoC: RK3588 v1 SoC: RK3588S v0 SoC: RK3588S v1 SoC: RK3588S2 v1
when U-Boot proper is running.
U-Boot 2025.01-rc1 (Nov 02 2024 - 20:19:01 +0000)
Model: Generic RK3588S/RK3588 SoC: RK3588S2 v1 DRAM: 8 GiB
Information about the SoC model, variant and version is read from OTP.
Also update rk3588s-u-boot.dtsi to include OTP in U-Boot pre-reloc phase, where checkboard() is called.
Signed-off-by: Jonas Karlman jonas@kwiboo.se --- v2: - Update commit message - Update code comments - Drop generic-rk3588_defconfig change --- arch/arm/dts/rk3588s-u-boot.dtsi | 4 ++ arch/arm/mach-rockchip/rk3588/rk3588.c | 58 ++++++++++++++++++++++++++ 2 files changed, 62 insertions(+)
diff --git a/arch/arm/dts/rk3588s-u-boot.dtsi b/arch/arm/dts/rk3588s-u-boot.dtsi index 09d8b311cec5..8880d162b11c 100644 --- a/arch/arm/dts/rk3588s-u-boot.dtsi +++ b/arch/arm/dts/rk3588s-u-boot.dtsi @@ -69,6 +69,10 @@ bootph-all; };
+&otp { + bootph-some-ram; +}; + &pcfg_pull_down { bootph-all; }; diff --git a/arch/arm/mach-rockchip/rk3588/rk3588.c b/arch/arm/mach-rockchip/rk3588/rk3588.c index e2dac2a5b806..f9da7a6f1477 100644 --- a/arch/arm/mach-rockchip/rk3588/rk3588.c +++ b/arch/arm/mach-rockchip/rk3588/rk3588.c @@ -4,6 +4,8 @@ * Copyright (c) 2022 Edgeble AI Technologies Pvt. Ltd. */
+#include <dm.h> +#include <misc.h> #include <spl.h> #include <asm/armv8/mmu.h> #include <asm/arch-rockchip/bootrom.h> @@ -178,3 +180,59 @@ int arch_cpu_init(void) return 0; } #endif + +#define RK3588_OTP_CPU_CODE_OFFSET 0x02 +#define RK3588_OTP_SPECIFICATION_OFFSET 0x06 +#define RK3588_OTP_CPU_VERSION_OFFSET 0x1c + +int checkboard(void) +{ + u8 cpu_code[2], specification, package, cpu_version; + struct udevice *dev; + char suffix[3]; + int ret; + + ret = uclass_get_device_by_driver(UCLASS_MISC, + DM_DRIVER_GET(rockchip_otp), &dev); + if (ret) { + debug("%s: could not find otp device, ret=%d\n", __func__, ret); + return 0; + } + + /* cpu-code: SoC model, e.g. 0x35 0x82 or 0x35 0x88 */ + ret = misc_read(dev, RK3588_OTP_CPU_CODE_OFFSET, cpu_code, 2); + if (ret < 0) { + debug("%s: could not read cpu-code, ret=%d\n", __func__, ret); + return 0; + } + + /* specification: SoC variant, e.g. 0xA for RK3588J and 0x13 for RK3588S */ + ret = misc_read(dev, RK3588_OTP_SPECIFICATION_OFFSET, &specification, 1); + if (ret < 0) { + debug("%s: could not read specification, ret=%d\n", __func__, ret); + return 0; + } + /* package: likely SoC variant revision, 0x2 for RK3588S2 */ + package = specification >> 5; + specification &= 0x1f; + + /* cpu-version: chip version, e.g. second letter of lot number */ + ret = misc_read(dev, RK3588_OTP_CPU_VERSION_OFFSET, &cpu_version, 1); + if (ret < 0) { + debug("%s: could not read cpu-version, ret=%d\n", __func__, ret); + return 0; + } + cpu_version >>= 3; + cpu_version &= 0x7; + + /* for RK3588J i.e. '@' + 0xA = 'J' */ + suffix[0] = specification > 1 ? '@' + specification : '\0'; + /* for RK3588S2 i.e. '0' + 0x2 = '2' */ + suffix[1] = package > 1 ? '0' + package : '\0'; + suffix[2] = '\0'; + + printf("SoC: RK%02x%02x%s v%u\n", + cpu_code[0], cpu_code[1], suffix, cpu_version); + + return 0; +}