Hi,
we test usb on BF527 EZKIT board instead of BF526 EZ-BOARD in our regression and release test, which should be quite similar.
In 2013R1 and 2014 master head, usb test on BF527-EZKIT are both fine with u-boot.ldr flashed.
2013R1 release:
U-Boot 2013.07 (ADI-2013R1)-00001-g2a7a19d-dirty (Sep 30 2013 - 01:01:09), Build: jenkins-label=UBOOT_BF527-EZKIT-69
CPU: ADSP bf527-0.0 (Detected Rev: 0.2) (parallel flash boot)
Board: ADI BF527 EZ-Kit board
Support: http://blackfin.uclinux.org/
Clock: VCO: 400 MHz, Core: 100 MHz, System: 50 MHz
RAM: 64 MiB
Flash: 4 MiB
In: serial
Out: serial
Err: serial
KGDB: [on serial] ready
Net: bfin_mac
Hit any key to stop autoboot: 9 8 7 6 5 0
bfin> waiting for uboot prompt
bfin> got u-boot prompt
icache on
bfin> dcache off
bfin> reginfo
System Configuration registers
PLL Registers
PLL_DIV: 0x0028 PLL_CTL: 0x2000
PLL_STAT: 0x00a2 PLL_LOCKCNT: 0x0300
VR_CTL: 0x7090
EBIU AMC Registers
EBIU_AMGCTL: 0x00f9
EBIU_AMBCTL0: 0xffc2ffc2 EBIU_AMBCTL1: 0xffc2ffc2
EBIU SDC Registers
EBIU_SDRRC: 0x03f6 EBIU_SDBCTL: 0x0025
EBIU_SDSTAT: 0x0001 EBIU_SDGCTL: 0x8011998d
bfin>
*****************************
STEP 43: Test USB Storage
usb start
(Re)start USB...
USB0: scanning bus 0 for devices... 1 USB Device(s) found
scanning usb for storage devices... 1 Storage Device(s) found
bfin> fatls usb 0
5293341 uimage
1 file(s), 0 dir(s)
bfin> fatload usb 0 0x1000000 uimage
reading uimage
5293341 bytes read in 3484 ms (1.4 MiB/s)
2014 master head:
U-Boot 2014.07 ADI-2014R1-pre-00427-g80a800d-dirty (Sep 03 2014 - 06:13:17), Build: jenkins-label=UBOOT_BF527-EZKIT-121
CPU: ADSP bf527-0.0 (Detected Rev: 0.2) (parallel flash boot)
Clock: VCO: 525 MHz, Core: 525 MHz, System: 131.250 MHz
I2C: ready
DRAM: 64 MiB
Flash: 4 MiB
In: serial
Out: serial
Err: serial
KGDB: [on serial] ready
Net: bfin_mac
Hit any key to stop autoboot: 9 8 7 6 5 0
bfin> waiting for uboot prompt
bfin> got u-boot prompt
icache on
bfin> dcache on
bfin> reginfo
System Configuration registers
PLL Registers
PLL_DIV: 0x0004 PLL_CTL: 0x2a00
PLL_STAT: 0x00a2 PLL_LOCKCNT: 0x0300
VR_CTL: 0x7090
EBIU AMC Registers
EBIU_AMGCTL: 0x00f9
EBIU_AMBCTL0: 0xffc2ffc2 EBIU_AMBCTL1: 0xffc2ffc2
EBIU SDC Registers
EBIU_SDRRC: 0x03f6 EBIU_SDBCTL: 0x0025
EBIU_SDSTAT: 0x0000 EBIU_SDGCTL: 0x8011998d
bfin>
*****************************
STEP 43: Test USB Storage
usb start
(Re)start USB...
USB0: scanning bus 0 for devices... 1 USB Device(s) found
scanning usb for storage devices... 1 Storage Device(s) found
bfin> fatls usb 0
5293341 uimage
1 file(s), 0 dir(s)
bfin> fatload usb 0 0x1000000 uimage
reading uimage
5293341 bytes read in 3111 ms (1.6 MiB/s)