I was using Raspberry Pi 3, bios chip is winbond W25Q64FW

flashrom v0.9.9-r1954 on Linux 4.4.13-v7+ (armv7l)
flashrom is free software, get the source code at https://flashrom.org

Calibrating delay loop... OK.
Found Winbond flash chip "W25Q64.W" (8192 kB, SPI) on linux_spi.
Reading old flash chip contents... done.
Erasing and writing flash chip... FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x00000fff: 0x1000
ERASE FAILED!
Reading current flash chip contents... done. Looking for another erase function.
FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x00007fff: 0x8000
ERASE FAILED!
Reading current flash chip contents... done. Looking for another erase function.
FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x0000ffff: 0x10000
ERASE FAILED!
Reading current flash chip contents... done. Looking for another erase function.
FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x007fffff: 0x800000
ERASE FAILED!
Reading current flash chip contents... done. Looking for another erase function.
FAILED at 0x00000000! Expected=0xff, Found=0x00, failed byte count from 0x00000000-0x007fffff: 0x800000
ERASE FAILED!
Looking for another erase function.
No usable erase functions left.
FAILED!
Uh oh. Erase/write failed. Checking if anything has changed.
Reading current flash chip contents... done.
Apparently at least some data has changed.
Your flash chip is in an unknown state.
Please report this on IRC at chat.freenode.net (channel #flashrom) or
mail flashrom@flashrom.org, thanks!
pi@raspberrypi:~ $