Linux/AM5718: USB boot support on IDK

mahesh muni

Prodigy 120 points

Part Number: AM5718

Tool/software: Linux

I am trying the usb boot mode using the micro usb (J45) connected to usb storage device.

the storage device is created with two partitions boot and rootfs and copied the respective files and file system.

But when I go throw the uboot code it is clear that no usb boot mode is enable for am571x.

The changes added by referring am43xx,

In the am57xx_evm.h added #define CONFIG_SYS_USB_FAT_BOOT_PARTITION 1

In am57xx/board.c, added ti_usb_phy_uboot_init(&usb_phy1_device);

Enabled the config SPL / TPL ---> Support USB host drivers -> Support loading from USB

Error:

undefined reference to `ti_usb_phy_uboot_init'

undefined reference to `dwc3_omap_uboot_init'

undefined reference to `dwc3_uboot_init'

undefined reference to `dwc3_uboot_exit'

undefined reference to `dwc3_omap_uboot_exit'

Using the ti-processor-sdk-linux-am57xx-evm-04.01.00.06-Linux-x86-Install.bin

Can you please help us on how to enable the usb boot mode in am571x idk?

Thanks

Mahesh Muni

over 8 years ago

0 Biser Gatchev-XID over 8 years ago

TI__Guru**** 393215 points

Hi,

See section 4.1 in this document: www.ti.com/.../sprui97a.pdf

0 mahesh muni over 8 years ago in reply to Biser Gatchev-XID

Prodigy 120 points

Hi Biser

Thank you for the reply.
I have already gone through this section along with TRM. the sysboot has been changed to support the usb boot mode.

But I want to know the u-boot code changes to enable to usb boot mode from micro usb connected usb flash drive?

thanks
mahesh muni j

0 Steve Kipisz over 8 years ago in reply to mahesh muni

TI__Genius 15510 points

USB boot is not done using a flash drive. There is a protocol between the board and a PC host that is documented in the Peripheral Booting section of the Initialization chapter of the TRM.

Steve K.

0 mahesh muni over 8 years ago in reply to Steve Kipisz

Prodigy 120 points

Hi Steve

Thank you for the reply.

To implement the usb boot as corrected by the description and TRM, it is clear for me now.
But still the support for the usb boot has to be added in the u boot code to even to boot from the PC connected the other end to the usb cable, which is not present in the current sdk u boot code.

Please help us apart from the above changes made (in my first post), how to resolve the error mentioned (u boot init errors).

Thanks
Mahesh Muni J

0 Steve Kipisz over 8 years ago in reply to mahesh muni

TI__Genius 15510 points

Look at this link http://processors.wiki.ti.com/index.php/Linux_Core_U-Boot_User's_Guide?keyMatch=am57xx%20u-boot%20user%27s%20guide&tisearch=Search-EN-Everything#Using_USB_Device_Firmware_Upgrade_.28DFU.29 for USB booting. And it only works on USB1. You do not have to do the make menuconfig since DFU is already enabled.

Steve K.

Processors

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Linux/AM5718: USB boot support on IDK