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spi25_statusreg: make register read/write functions generic

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This patch adds new spi_{read,write}_register() functions that take the
source/destination register as an argument. Currently they can only
access SR1, support for other registers will be added in another patch.

Since we're refactoring things, this commit also makes
spi_read_register() return an error code, making it possible to identify
error conditions that spi_read_status_register() concealed.

This also removes the initial 100ms delay between writing a register and
the first attempt to check the chip's status. An initial delay was added
to avoid needing to read the status register multiple times, but that is
unlikely to cause problems on modern flash chips.

BUG=b:195381327,b:153800563
BRANCH=none
TEST=flashrom -{r,w,E}
TEST=flashrom --wp-{enable,disable,range,list,status} at end of patch series

Change-Id: I0a3951bbf993f2d8d830143b29d3ce16cc6901d7
Signed-off-by: Nikolai Artemiev <nartemiev@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/58475
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
This commit is contained in:
Nikolai Artemiev
2021-10-20 22:30:41 +11:00
committed by Anastasia Klimchuk
parent 4571361d0e
commit a0319804a0
3 changed files with 99 additions and 43 deletions
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4
chipdrivers.h
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@ -62,8 +62,10 @@ int spi_set_extended_address(struct flashctx *, uint8_t addr_high);
/* spi25_statusreg.c */
/* FIXME: replace spi_read_status_register() calls with spi_read_register() */
uint8_t spi_read_status_register(const struct flashctx *flash);
int spi_write_status_register(const struct flashctx *flash, int status);
int spi_read_register(const struct flashctx *flash, enum flash_reg reg, uint8_t *value);
int spi_write_register(const struct flashctx *flash, enum flash_reg reg, uint8_t value);
void spi_prettyprint_status_register_bit(uint8_t status, int bit);
int spi_prettyprint_status_register_plain(struct flashctx *flash);
int spi_prettyprint_status_register_default_welwip(struct flashctx *flash);