From my side, I tried to flash my Asrock AB350 Pro 4 mainboard with that same chip  -Winbond W25Q128.W- with Flashrom v1.1 build from source on a Rasberry PI 3B. It found the chip via the motherboard's SPI header pins succesfully. I could read it's into a bin file, but when I tried to erase/write it whit a new bios version (to update my bios for Ryzen 7 2700) it can't, cause the write protection. After this trying, I desoldered the chip from the board, and "installed" onto a breadboard with pull up resistorsfor /WP and /Hold and a 820 Ohm serie resistor with VCC and I connected a 0.22 uF capacitor beatwen the VCC and GND nearest to the chip. When I tried this setup, the Flashrom can read recognize the chip and read it's memory of course and when I tried to flas it with a new bios file from asrcok.com, It seems It can write into the chip...Flashrom had begun the Erase/write step, my Raspberry's CPU had a 25-32% system load...I thought it will be successful, but this writing erasing process has never end. I left my Pi system to working on it for hours, but never and. spispeed=2000. So now i ordered a CH341A programmer with 1.8 V SOIC8 adapter and I will trying with that.