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flashchips,spi25: Replace .wrea_override with FEATURE_4BA_EAR_1716

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There are two competing sets of instructions to access the extended
address register of 4BA SPI chips. Some chips even support both sets.

So far, we assumed the 0xc5/0xc8 instructions by default and allowed
to override the write instructions with the `.wrea_override` field.
This has some disadvantages:

* The additional field is easily overlooked. So when adding a new
  flash chip, one might assume only 0xc5/0xc8 are supported.

* We cannot describe flash chips completely that allow both
  instructions (and some programmers may be picky about which
  instructions can be used).

Therefore, replace the `.wrea_override` field with a feature flag.

Signed-off-by: Nico Huber <nico.h@gmx.de>
Change-Id: I6d82f24898acd0789203516a7456fd785907bc10
Ticket: https://ticket.coreboot.org/issues/357
Reviewed-on: https://review.coreboot.org/c/flashrom/+/64636
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Thomas Heijligen <src@posteo.de>
This commit is contained in:
Nico Huber
2022-05-24 15:07:34 +02:00
parent 418916428f
commit d90e2b3e2c
5 changed files with 27 additions and 17 deletions
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4
flashchips.c
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@ -16795,7 +16795,8 @@ const struct flashchip flashchips[] = {
.total_size = 32768,
.page_size = 256,
/* OTP: 1024B total, 32B reserved; read 0x4B; write 0x42 */
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_4BA_EAR7,
.feature_bits = FEATURE_WRSR_WREN | FEATURE_OTP |
FEATURE_4BA_NATIVE | FEATURE_4BA_ENTER_EAR7 | FEATURE_4BA_EAR_1716,
.tested = TEST_OK_PREW,
.probe = probe_spi_rdid,
.probe_timing = TIMING_ZERO,
@ -16829,7 +16830,6 @@ const struct flashchip flashchips[] = {
.write = spi_chip_write_256, /* Multi I/O supported */
.read = spi_chip_read, /* Fast read (0x0B) and multi I/O supported */
.voltage = {2700, 3600},
.wrea_override = 0x17,
},
{