Hi, im trying to apply me_cleaner to a HP ProBook 450 G8. It has a W25Q256JVEQ WSON8 chip soldered so i bought a WSON connector thingy and try to read from it with a pi:
olle@raspberrypi:~ $ sudo flashrom/flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=10000 -c W25Q256JV_Q -V -r hp-bios-original.bin
flashrom v1.2-887-g6c1b0ac on Linux 5.15.56-v7+ (armv7l) flashrom is free software, get the source code at https://flashrom.org
Using clock_gettime for delay loops (clk_id: 1, resolution: 1ns). flashrom was built with GCC 10.2.1 20210110, little endian Command line (7 args): flashrom/flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=10000 -c W25Q256JV_Q -V -r hp-bios-original.bin Initializing linux_spi programmer Using device /dev/spidev0.0 Using 10000kHz clock get_max_kernel_buf_size: Using value from /sys/module/spidev/parameters/bufsiz as max buffer size. linux_spi_init: max_kernel_buf_size: 4096 The following protocols are supported: SPI. Probing for Winbond W25Q256JV_Q, 32768 kB: compare_id: id1 0xef, id2 0x4019 Added layout entry 00000000 - 01ffffff named complete flash Found Winbond flash chip "W25Q256JV_Q" (32768 kB, SPI) on linux_spi. Chip status register is 0x00. This chip may contain one-time programmable memory. flashrom cannot read and may never be able to write it, hence it may not be able to completely clone the contents of this chip (see man page for details). === This flash part has status UNTESTED for operations: PROBE READ ERASE WRITE The test status of this chip may have been updated in the latest development version of flashrom. If you are running the latest development version, please email a report to firstname.lastname@example.org if any of the above operations work correctly for you with this flash chip. Please include the flashrom log file for all operations you tested (see the man page for details), and mention which mainboard or programmer you tested in the subject line. Thanks for your help! Reading flash... done.
Looks great? It correctly identifies the chip and i get a file of the right size. Its just that it contains only zeroes. Thirty-two million of them. Not great.
I used freshly compiled flashrom from git, hardware was a raspi 2b rev1.1 running raspbian bullseye freshly updated. What would you suggest as a next step? Try different speed settings, desolder the chip, what more? And yeah, the batteries (main, clock) were disconnected.