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authorDuncan Laurie <dlaurie@chromium.org>2015-01-15 15:28:46 -0800
committerPatrick Georgi <pgeorgi@google.com>2015-04-17 09:21:22 +0200
commitfb032398d262ff7594c35c65b6f14897bb331a39 (patch)
treeadc486e7b25eff3f8b425eb75c78a8f4da77bed0 /src/drivers/spi/winbond.c
parent1968b5801098ab1c549ed47e42f543aff1cb2637 (diff)
downloadcoreboot-fb032398d262ff7594c35c65b6f14897bb331a39.tar.xz
spi: Add function to read flash status register
Add a function that allows reading of the status register from the SPI chip. This can be used to determine whether write protection is enabled on the chip. BUG=chrome-os-partner:35209 BRANCH=haswell TEST=build and boot on peppy Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/240702 Reviewed-by: Shawn N <shawnn@chromium.org> (cherry picked from commit c58f17689162b291a7cdb57649a237de21b73545) Change-Id: Ib7fead2cc4ea4339ece322dd18403362c9c79c7d Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 9fbdf0d72892eef4a742a418a347ecf650c01ea5 Original-Change-Id: I2541b22c51e43f7b7542ee0f48618cf411976a98 Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/241128 Original-Reviewed-by: Shawn N <shawnn@chromium.org> Reviewed-on: http://review.coreboot.org/9730 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/drivers/spi/winbond.c')
-rw-r--r--src/drivers/spi/winbond.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/drivers/spi/winbond.c b/src/drivers/spi/winbond.c
index 18ef105134..c4abc3a24a 100644
--- a/src/drivers/spi/winbond.c
+++ b/src/drivers/spi/winbond.c
@@ -218,6 +218,7 @@ struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
stm.flash.write = winbond_write;
stm.flash.erase = spi_flash_cmd_erase;
+ stm.flash.status = spi_flash_cmd_status;
#if CONFIG_SPI_FLASH_NO_FAST_READ
stm.flash.read = spi_flash_cmd_read_slow;
#else
@@ -229,6 +230,7 @@ struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode)
* params->sectors_per_block
* params->nr_blocks;
stm.flash.erase_cmd = CMD_W25_SE;
+ stm.flash.status_cmd = CMD_W25_RDSR;
return &stm.flash;
}