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writeprotect.c: Allow opaque masters to hook {read,write}_register()

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Allow specialisation in opaque masters, such as ichspi hwseq, to
write to status registers.

Also update the dispatch logic in libflashrom to call wp code when
status register access functions are provided by an opaque master.

BUG=none
BRANCH=none
TEST=flashrom --wp-status on AMD and Intel DUTs

Change-Id: I3ab0d7f5f48338c8ecb118a69651c203fbc516ac
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Signed-off-by: Nikolai Artemiev <nartemiev@google.com>
Co-Authored-by: Nikolai Artemiev <nartemiev@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/64375
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Edward O'Callaghan
2022-05-16 15:38:18 +10:00
committed by Edward O'Callaghan
parent fac9fc28f5
commit f630a1623f
4 changed files with 53 additions and 13 deletions
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18
libflashrom.c
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@ -470,34 +470,34 @@ void flashrom_wp_get_range(size_t *start, size_t *len, const struct flashrom_wp_
enum flashrom_wp_result flashrom_wp_write_cfg(struct flashctx *flash, const struct flashrom_wp_cfg *cfg)
{
if (flash->mst->buses_supported & BUS_SPI)
return wp_write_cfg(flash, cfg);
if (flash->mst->buses_supported & BUS_PROG && flash->mst->opaque.wp_write_cfg)
return flash->mst->opaque.wp_write_cfg(flash, cfg);
if (wp_operations_available(flash))
return wp_write_cfg(flash, cfg);
return FLASHROM_WP_ERR_OTHER;
}
enum flashrom_wp_result flashrom_wp_read_cfg(struct flashrom_wp_cfg *cfg, struct flashctx *flash)
{
if (flash->mst->buses_supported & BUS_SPI)
return wp_read_cfg(cfg, flash);
if (flash->mst->buses_supported & BUS_PROG && flash->mst->opaque.wp_read_cfg)
return flash->mst->opaque.wp_read_cfg(cfg, flash);
if (wp_operations_available(flash))
return wp_read_cfg(cfg, flash);
return FLASHROM_WP_ERR_OTHER;
}
enum flashrom_wp_result flashrom_wp_get_available_ranges(struct flashrom_wp_ranges **list, struct flashrom_flashctx *flash)
{
if (flash->mst->buses_supported & BUS_SPI)
return wp_get_available_ranges(list, flash);
if (flash->mst->buses_supported & BUS_PROG && flash->mst->opaque.wp_get_ranges)
return flash->mst->opaque.wp_get_ranges(list, flash);
if (wp_operations_available(flash))
return wp_get_available_ranges(list, flash);
return FLASHROM_WP_ERR_OTHER;
}