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Support #371

closed
AK LF

Check XMC spi flash chips definitions

Support #371: Check XMC spi flash chips definitions

Added by Anastasia Klimchuk almost 4 years ago. Updated about 3 years ago.

Status:
Resolved
Priority:
Normal
Assignee:
Liam Flaherty
Category:
Release prep
Target version:
main
Start date:
04/28/2022
Due date:
% Done:

90%

Estimated time:
Affected versions:
Needs backport to:
Affected hardware:
Affected OS:

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?

Related links

https://review.coreboot.org/c/flashrom/+/48949

AK Updated by Anastasia Klimchuk over 3 years ago Actions
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 #1

  • Assignee set to Anastasia Klimchuk

AK Updated by Anastasia Klimchuk over 3 years ago Actions
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 #2

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
  2. This is correct.

Remaining question need to be answered is 2) which means checking the datasheets and compare with chip definitions for block erasers.

FS Updated by Felix Singer over 3 years ago Actions
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 #3

  • Tracker changed from Feature to Support
  • Target version changed from 1.3 to main

LF Updated by Liam Flaherty over 3 years ago Actions
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 #4

  • Assignee changed from Anastasia Klimchuk to Liam Flaherty

LF Updated by Liam Flaherty over 3 years ago Actions
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 #5

  1. 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.

AK Updated by Anastasia Klimchuk over 3 years ago Actions
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 #6

Looks like this is resolved, can be closed. Let me double-check.

AK Updated by Anastasia Klimchuk over 3 years ago Actions
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 #7

  • % Done changed from 0 to 90

FS Updated by Felix Singer about 3 years ago Actions
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 #8

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?

FS Updated by Felix Singer about 3 years ago Actions
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 #9

  • Status changed from New to Response Needed

FS Updated by Felix Singer about 3 years ago Actions
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 #10

  • Parent task deleted (#353)

LF Updated by Liam Flaherty about 3 years ago Actions
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 #11

I will add the FEATURE_4BA_WRITE flag for these chips.

LF Updated by Liam Flaherty about 3 years ago Actions
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 #12

  • Status changed from Response Needed to Resolved
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