https://bugzilla.kernel.org/show_bug.cgi?id=218190 Bug ID: 218190 Summary: Driver fails to flash ROM to Renesas uPD720201/uPD720202 when using not officially supported SPI Flash Product: Drivers Version: 2.5 Hardware: All OS: Linux Status: NEW Severity: high Priority: P3 Component: USB Assignee: drivers_usb@xxxxxxxxxxxxxxxxxxxxxx Reporter: gamelaster@xxxxxxxxxxx Regression: No My uPD720201 is using XT25F04B SPI Flash, which is not officially supported, according to User Manual document. Because of this, register 0xF0 (RENESAS_ROM_CONFIG -> External ROM Configuration Register) is 0x0000. This register contains configuration for SPI Flash, thus when xhci-pci-renesas driver tries to upload the firmware into ROM, it corrupts SPI Flash and fails, resulting the hub working from ROM, or not working at all. In this case, the RENESAS_ROM_CONFIG register needs to be set to appropriate value, in this case, 0x700 worked properly, and so far, for most of non officially supported SPI Flashes, 0x700 worked fine. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
