I have 250GB USB-HDD attached to sheevaplug and using u-boot
U-Boot 2010.03-00176-g42f7128 (Aug 06 2010 - 22:24:34) Marvell-Sheevaplug
It's a tip of 'u-boot-marvell/testing' branch. I'm currently booting linux kernel from NAND and using ext4 rootfs placed on this USB HDD. Everything works mostly fine here (in-NAND kernel and usb survive multiple reboots).
The problem is faulty usb detection in u-boot prompt.
After some reboots (one reboot is usually enough) u-boot can't find attached USB storages:
# reboot linux kernel and stop at u-boot prompt Marvell>> usb start (Re)start USB... USB: Register 10011 NbrPorts 1 USB EHCI 1.00 scanning bus for devices... 2 USB Device(s) found scanning bus for storage devices... error in inquiry 0 Storage Device(s) found Marvell>> usb start (Re)start USB... USB: Register 10011 NbrPorts 1 USB EHCI 1.00 scanning bus for devices... 2 USB Device(s) found scanning bus for storage devices... 0 Storage Device(s) found #ok, usb is dead? let's see if linux kernel will find it Marvell>> nand read 0x01000000 0x00100000 0x00400000
NAND read: device 0 offset 0x100000, size 0x400000 4194304 bytes read: OK Marvell>> setenv boot bootdelay bootargs bootcmd Marvell>> setenv bootargs console=ttyS0,115200 root=/dev/sda3 rw rootwait #points to usb hdd! Marvell>> bootm 0x01000000 ## Booting kernel from Legacy Image at 01000000 ... Image Name: Linux-2.6.35 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2192340 Bytes = 2.1 MB Load Address: 00008000 Entry Point: 00008000 Verifying Checksum ... OK Loading Kernel Image ... OK OK
Starting kernel ... <skip> [ 22.867424] Waiting for root device /dev/sda3... [ 23.015860] scsi0 : usb-storage 1-1:1.0 [ 26.054268] scsi 0:0:0:0: Direct-Access StoreJet Transcend PQ: 0 ANSI: 2 CCS [ 28.774083] sd 0:0:0:0: [sda] 488397168 512-byte logical blocks: (250 GB/232 GiB) [ 28.782324] sd 0:0:0:0: [sda] Write Protect is off [ 28.787167] sd 0:0:0:0: [sda] Assuming drive cache: write through [ 28.794693] sd 0:0:0:0: [sda] Assuming drive cache: write through [ 28.800822] sda: sda1 sda2 sda3 sda4 [ 28.909571] sd 0:0:0:0: [sda] Assuming drive cache: write through [ 28.915736] sd 0:0:0:0: [sda] Attached SCSI disk [ 28.944594] EXT3-fs (sda3): error: couldn't mount because of unsupported optional features (240) [ 28.953954] EXT2-fs (sda3): error: couldn't mount because of unsupported optional features (240) [ 28.992562] EXT4-fs (sda3): mounted filesystem with ordered data mode. Opts: (null) [ 29.000323] VFS: Mounted root (ext4 filesystem) on device 8:3. [ 29.006227] Freeing init memory: 112K INIT: version 2.87 booting
And it finds it! *phew* It usually takes ~4 seconds to wait for root.
When I power off/power on sheevaplug I am able to load something directly from USB: Marvell>> usb start (Re)start USB... USB: Register 10011 NbrPorts 1 USB EHCI 1.00 scanning bus for devices... 2 USB Device(s) found scanning bus for storage devices... 1 Storage Device(s) found Marvell>> usb storage Device 0: Vendor: StoreJet Rev: Prod: Transcend Type: Hard Disk Capacity: 28759.9 MB = 28.0 GB (488397168 x 512)
Heh, capacity is reported incorrectly, but it works am I'm able to load kernel from there.
Marvell>> ext2ls usb 0:2 / <DIR> 1024 . <DIR> 1024 .. <DIR> 12288 lost+found <SYM> 1 boot 0 .keep 4466528 vmlinuz-2.6.35 904705 System.map-2.6.35 49205 config-2.6.35 4466528 vmlinuz-2.6.35.old 904705 System.map-2.6.35.old 49205 config-2.6.35.old 2192404 uImage-2.6.35 331132 u-boot.kwb-20100806
Marvell>> ext2load usb 0:2 0x01000000 /uImage-2.6.35 Loading file "/uImage-2.6.35" from usb device 0:2 (usbda2) 2192404 bytes read Marvell>> bootm 0x01000000 ## Booting kernel from Legacy Image at 01000000 ... Image Name: Linux-2.6.35 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2192340 Bytes = 2.1 MB Load Address: 00008000 Entry Point: 00008000 Verifying Checksum ... OK Loading Kernel Image ... OK OK
Starting kernel ...
and up to the shell#
If I reboot u-boot can't find usb storages (but the in-NAND kernel will boot): [ 249.433555] Restarting system.
U-Boot 2010.03-00176-g42f7128 (Aug 06 2010 - 22:24:34) Marvell-Sheevaplug ... Hit any key to stop autoboot: 0 Marvell>> usb start (Re)start USB... USB: Register 10011 NbrPorts 1 USB EHCI 1.00 scanning bus for devices... 2 USB Device(s) found scanning bus for storage devices... error in inquiry 0 Storage Device(s) found
All these things are almost 100% reproducible.
Vendor-shipped (Marvell's) u-boot has exactly the same disease: ** MARVELL BOARD: SHEEVA PLUG LE U-Boot 1.1.4 (Mar 19 2009 - 16:06:59) Marvell version: 3.4.16