[参考译文] AM623：使用 AM6234 SD 引导卡的定制硬件在导入后会遇到启动故障。

SD 卡刷写过程：

您是否尝试过不同的 SD 卡、但所有 SD 卡仍然存在相同的问题？

已注册两张 SD 卡 — 两张卡均失败，出现类似错误。  症状：

此芯片组是否有任何特定的 SD 卡要求？

已知某些 SD 卡出现故障、尤其是 SanDisk 32GB 卡。 在继续执行 SD 卡权变措施之前、您是否可以应用以下补丁并共享日志：

diff --git a/arch/arm/mach-k3/am62x/boot.c b/arch/arm/mach-k3/am62x/boot.c
index df5af9c0bce..50a4437bb4a 100644
--- a/arch/arm/mach-k3/am62x/boot.c
+++ b/arch/arm/mach-k3/am62x/boot.c
@@ -3,6 +3,8 @@
 #include <asm/arch/hardware.h>
 #include <asm/arch/am62_spl.h>
 
+#define debug printf
+
 static u32 __get_backup_bootmedia(u32 devstat)
 {
 	u32 bkup_bootmode = (devstat & MAIN_DEVSTAT_BACKUP_BOOTMODE_MASK) >>

这样我就可以看到您配置为从 SD 卡引导的引导模式引脚。

您好、此问题是否仍然存在？

尊敬的 Chen：

听说了 Jacob、 您无法创建 u-boot？

在 SDK 安装文件夹：make uboot 和 make-u-boot-stage 下、无需手动进行。  

请参阅 SDK 用户指南：   1.1.4. 使用 Makefile 构建 SDK、如果仍然有问题、 请创建新帖子并粘贴日志。  

https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/11_01_05_03/exports/docs/linux/Overview/Top_Level_Makefile．html

您好、Prashant、

#1。 更改了此文件夹中的 dts (@ubuntu22：~/ti-processor-sdk-linux-am62xx-evm-11.01.05.03/board-support/ti-u-boot-2025.01+git/dts/上游/ src /arm64/ti$)
) 如下所示、因为定制板只有用于 SD 卡的 3.3V 电压。

#2. 定制板 SD 卡电源原理图如下所示、这几乎与 Beagleplay 板设计相同。

#3.  使用启用调试日志的各种电路板上的同一 SD 卡进行引导：

在 SK-AM62 E3（（GP 器件）上

U-Boot SPL 2025.01-gd2a72467939e-dirty (Jul 31 2025 - 13:16:15 +0800)
SYSFW ABI: 4.0 (firmware rev 0x000b '11.1.2--v11.01.02 (Fancy Rat)')
Changed A53 CPU frequency to 1250000000Hz (T grade) in DT
SPL initial stack usage: 13392 bytes
get_boot_device: devstat = 0xff43 bootmedia = 0x8 bootmode = 0
Trying to boot from MMC2
Skipping authentication on GP device
Skipping authentication on GP device
Skipping authentication on GP device
Skipping authentication on GP device
Skipping authentication on GP device
Starting ATF on ARM64 core...

NOTICE:  BL31: v2.13.0(release):v2.13.0-240-gd90bb650fe-dirty
NOTICE:  BL31: Built : 21:37:18, Jun 23 2025

U-Boot SPL 2025.01-gd2a72467939e-dirty (Jul 31 2025 - 13:16:50 +0800)
SYSFW ABI: 4.0 (firmware rev 0x000b '11.1.2--v11.01.02 (Fancy Rat)')
SPL initial stack usage: 2032 bytes
get_boot_device: devstat = 0xff43 bootmedia = 0x8 bootmode = 0
Trying to boot from MMC2
Skipping authentication on GP device
Skipping authentication on GP device


U-Boot 2025.01-gd2a72467939e-dirty (Jul 31 2025 - 13:16:50 +0800)

SoC:   AM62X SR1.0 GP
Model: Texas Instruments AM625 SK
DRAM:  2 GiB
Core:  83 devices, 32 uclasses, devicetree: separate
MMC:   mmc@fa10000: 0, mmc@fa00000: 1
Loading Environment from nowhere... OK
In:    serial
Out:   serial
Err:   serial
Net:   eth0: ethernet@8000000port@1

在 Beagleplay 板上：

U-Boot SPL 2025.01-gd2a72467939e-dirty (Jul 31 2025 - 13:16:15 +0800)
SYSFW ABI: 4.0 (firmware rev 0x000b '11.1.2--v11.01.02 (Fancy Rat)')
Changed A53 CPU frequency to 1250000000Hz (T grade) in DT
SPL initial stack usage: 13392 bytes
get_boot_device: devstat = 0x643 bootmedia = 0x8 bootmode = 0
Trying to boot from MMC2
Skipping authentication on GP device
Skipping authentication on GP device
Skipping authentication on GP device
Skipping authentication on GP device
Skipping authentication on GP device
Starting ATF on ARM64 core...

NOTICE:  BL31: v2.13.0(release):v2.13.0-240-gd90bb650fe-dirty
NOTICE:  BL31: Built : 21:37:18, Jun 23 2025

U-Boot SPL 2025.01-gd2a72467939e-dirty (Jul 31 2025 - 13:16:50 +0800)
SYSFW ABI: 4.0 (firmware rev 0x000b '11.1.2--v11.01.02 (Fancy Rat)')
SPL initial stack usage: 2032 bytes
get_boot_device: devstat = 0x643 bootmedia = 0x8 bootmode = 0
Trying to boot from MMC2
Skipping authentication on GP device
Skipping authentication on GP device


U-Boot 2025.01-gd2a72467939e-dirty (Jul 31 2025 - 13:16:50 +0800)

SoC:   AM62X SR1.0 GP
Model: Texas Instruments AM625 SK
DRAM:  2 GiB
Core:  83 devices, 32 uclasses, devicetree: separate
MMC:   mmc@fa10000: 0, mmc@fa00000: 1
Loading Environment from nowhere... OK
In:    serial
Out:   serial
Err:   serial
Net:   Could not get PHY for mdio@f00: addr 0
am65_cpsw_nuss_port ethernet@8000000port@1: phy_connect() failed
No ethernet found.

定制电路板上：

U-Boot SPL 2025.01-gd2a72467939e-dirty (Jul 31 2025 - 13:16:15 +0800)
SYSFW ABI: 4.0 (firmware rev 0x000b '11.1.2--v11.01.02 (Fancy Rat)')
Changed A53 CPU frequency to 1250000000Hz (T grade) in DT                       
SPL initial stack usage: 13392 bytes                                            
get_boot_device: devstat = 0xff43 bootmedia = 0x8 bootmode = 0                  
Trying to boot from MMC2                                                        
Partition 1 invalid on device 1                                                 
spl_register_fat_device: fat register err - -1                                  
spl_load_image_fat: error reading image tispl.bin, err - -1                     
SPL: failed to boot from all boot devices                                       
### ERROR ### Please RESET the board ### 

DTS 中的配置应该会影响引导、但在哪里？

您好：

引导模式配置似乎不正确、但不应导致问题。 保留的引脚应为 0、因此对于 SD 卡引导、devstat 应读取 0x243、而无需备用引导。

请使用以下命令启用更多日志记录：

diff --git a/configs/am62x_evm_r5_defconfig b/configs/am62x_evm_r5_defconfig
index 048f5c7e143..1a259353913 100644
--- a/configs/am62x_evm_r5_defconfig
+++ b/configs/am62x_evm_r5_defconfig
@@ -126,3 +126,6 @@ CONFIG_SPL_TIMER=y
 CONFIG_OMAP_TIMER=y
 CONFIG_LIB_RATIONAL=y
 CONFIG_SPL_LIB_RATIONAL=y
+
+CONFIG_MMC_TRACE=y
+
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 799586891af..26f6af085b5 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -29,6 +29,7 @@
 #include "mmc_private.h"
 
 #define DEFAULT_CMD6_TIMEOUT_MS  500
+#define pr_debug printf
 
 /**
  * names of emmc BOOT_PARTITION_ENABLE values

此外、是否已经审查了定制电路板的原理图？

50MHz MMC_CLK 对于定制电路板来说是否过高？ 可以限制为较低的测试频率？

这可以在传统模式下尝试一次。 只需注释掉 SD HS 模式的 OTAP 属性。