Recently I got an AT25F512(no A) chip from my old nVidia Geforce FX 5200 card. However, flashrom seems to recognize it as AT25F1024:
flashrom -p serprog:dev=/dev/ttyACM0:4000000,spispeed=1000000 flashrom v0.9.6.1-r1658 on Linux 3.2.0-39-generic (x86_64) flashrom is free software, get the source code at http://www.flashrom.org
Calibrating delay loop... OK. serprog: Programmer name is "serprog-STM32VCP" Found Atmel flash chip "AT25F1024(A)" (128 kB, SPI) on serprog. No operations were specified.
The detailed log with -VV canbe found at: http://paste.flashrom.org/view.php?id=1568