Added by Anastasia Klimchuk over 2 years ago. Updated almost 2 years ago.
90%
Description
Chips to check:
XM25QU64C
XM25QU128C
XM25QU256C
XM25QH64C
XM25QH128C
XM25QH256C
Specific questions:
1) Looks like copy-pasta from Winbond chips.
2) Might miss some block erasers.
3) Missing 4BA_WRITE, is this correct?
After the discussion on the meeting, some answers to initial questions:
1) Yes, and this is WAI because these chips are copy-pasta of Winbond
3) This is correct.
Remaining question need to be answered is 2) which means checking the datasheets and compare with chip definitions for block erasers.
2) I have checked the erasers, they are all correct and none are missing.
On #3, the smaller variants of the chip (<256Mbit) do not support 4BA_WRITE, however the XM25Qx256C chips do appear to. They do also work in a "backwards compatible" mode that doesn't require the 4-byte addressing (see section "5.1.5 3-Byte/4-Byte Address Modes" of the datasheet), so they can work without 4BA_WRITE beings set as well.
Looks like this is resolved, can be closed. Let me double-check.
I understand most of the chip definitions are correct. Is anything left to do on the chip definitions for XM25QH256C and XM25QU256C regarding the 4BA mode?
I will add the FEATURE_4BA_WRITE flag for these chips.
4BA submitted under https://review.coreboot.org/c/flashrom/+/69713