No SD autoboot with newer u-boot

Question

I'm trying to move to a newer version of u-boot (along with newer versions of other tools), and I can't get it to autoboot Linux from my SD card.  This worked with a u-boot labeled 2013.04, but seems to fail with more recent stock releases from http://www.wiki.xilinx.com/Zynq+Releases
When I use the env print command, I see that the bootdelay parameter is set to -1, disabling autoboot.  When I try to build my own u-boot, the parameter appears to be set to 3 (in include/configs/zynq-common.h), but it comes out as -1 when I boot it.  I think I have the switches configured correctly to boot off the SD card, since this works with some older files I've got.
What am I missing?

Answer 1

Thanks, that was the problem.
Example of boot that worked, because it failed to find the SPI flash:
U-Boot 2013.04 (Oct 04 2013 - 11:37:37)
I2C: ready
Memory: ECC disabled
DRAM: 1 GiB
WARNING: Caches not enabled
MMC: zynq_sdhci: 0
SF: Unsupported manufacturer 00
*** Warning - spi_flash_probe() failed, using default environment
In: serial
Out: serial
Err: serial
Net: Gem.e000b000
Example of boot that stopped at the u-boot prompt:
U-Boot 2014.07 (Nov 24 2014 - 21:09:00)
Board: Xilinx Zynq
I2C: ready
DRAM: ECC disabled 1 GiB
MMC: zynq_sdhci: 0
SF: Detected N25Q128A with page size 256 Bytes, erase size 64 KiB, total 16 MiB
In: serial
Out: serial
Err: serial
Net: Gem.e000b000
I was able to fix this by wiping the SPI flash:
zynq-uboot> sf erase 0 0x1000000
SF: 16777216 bytes @ 0x0 Erased: OK
 Now my boot log begins:
U-Boot 2014.07 (Nov 24 2014 - 21:09:00)
Board: Xilinx Zynq
I2C: ready
DRAM: ECC disabled 1 GiB
MMC: zynq_sdhci: 0
SF: Detected N25Q128A with page size 256 Bytes, erase size 64 KiB, total 16 MiB
*** Warning - bad CRC, using default environment
In: serial
Out: serial
Err: serial
Net: Gem.e000b000