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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
parent1968b5801098ab1c549ed47e42f543aff1cb2637 (diff)
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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')
-rw-r--r--src/drivers/spi/eon.c2
-rw-r--r--src/drivers/spi/gigadevice.c2
-rw-r--r--src/drivers/spi/macronix.c2
-rw-r--r--src/drivers/spi/spansion.c2
-rw-r--r--src/drivers/spi/spi_flash.c6
-rw-r--r--src/drivers/spi/spi_flash_internal.h3
-rw-r--r--src/drivers/spi/sst.c2
-rw-r--r--src/drivers/spi/winbond.c2
8 files changed, 21 insertions, 0 deletions
diff --git a/src/drivers/spi/eon.c b/src/drivers/spi/eon.c
index 004b62bc0..923b0a560 100644
--- a/src/drivers/spi/eon.c
+++ b/src/drivers/spi/eon.c
@@ -168,11 +168,13 @@ struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode)
eon->flash.write = eon_write;
eon->flash.erase = spi_flash_cmd_erase;
+ eon->flash.status = spi_flash_cmd_status;
eon->flash.read = spi_flash_cmd_read_fast;
eon->flash.sector_size = params->page_size * params->pages_per_sector;
eon->flash.size = params->page_size * params->pages_per_sector
* params->nr_sectors;
eon->flash.erase_cmd = CMD_EN25_SE;
+ eon->flash.status_cmd = CMD_EN25_RDSR;
return &eon->flash;
}
diff --git a/src/drivers/spi/gigadevice.c b/src/drivers/spi/gigadevice.c
index 9686ee987..7f86b2b74 100644
--- a/src/drivers/spi/gigadevice.c
+++ b/src/drivers/spi/gigadevice.c
@@ -222,6 +222,7 @@ struct spi_flash *spi_flash_probe_gigadevice(struct spi_slave *spi, u8 *idcode)
stm.flash.write = gigadevice_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
@@ -233,6 +234,7 @@ struct spi_flash *spi_flash_probe_gigadevice(struct spi_slave *spi, u8 *idcode)
* params->sectors_per_block
* params->nr_blocks;
stm.flash.erase_cmd = CMD_GD25_SE;
+ stm.flash.status_cmd = CMD_GD25_RDSR;
return &stm.flash;
}
diff --git a/src/drivers/spi/macronix.c b/src/drivers/spi/macronix.c
index 8e514c27d..21eff39cc 100644
--- a/src/drivers/spi/macronix.c
+++ b/src/drivers/spi/macronix.c
@@ -242,6 +242,7 @@ struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode)
mcx->flash.write = macronix_write;
mcx->flash.erase = spi_flash_cmd_erase;
+ mcx->flash.status = spi_flash_cmd_status;
#if CONFIG_SPI_FLASH_NO_FAST_READ
mcx->flash.read = spi_flash_cmd_read_slow;
#else
@@ -251,6 +252,7 @@ struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode)
mcx->flash.size = mcx->flash.sector_size * params->sectors_per_block *
params->nr_blocks;
mcx->flash.erase_cmd = CMD_MX25XX_SE;
+ mcx->flash.status_cmd = CMD_MX25XX_RDSR;
return &mcx->flash;
}
diff --git a/src/drivers/spi/spansion.c b/src/drivers/spi/spansion.c
index 6dd703c7c..a0a99f9da 100644
--- a/src/drivers/spi/spansion.c
+++ b/src/drivers/spi/spansion.c
@@ -297,9 +297,11 @@ struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode)
spsn->flash.write = spansion_write;
spsn->flash.erase = spi_flash_cmd_erase;
spsn->flash.read = spi_flash_cmd_read_slow;
+ spsn->flash.status = spi_flash_cmd_status;
spsn->flash.sector_size = params->page_size * params->pages_per_sector;
spsn->flash.size = spsn->flash.sector_size * params->nr_sectors;
spsn->flash.erase_cmd = CMD_S25FLXX_SE;
+ spsn->flash.status_cmd = CMD_S25FLXX_RDSR;
return &spsn->flash;
}
diff --git a/src/drivers/spi/spi_flash.c b/src/drivers/spi/spi_flash.c
index 8213e852b..d40f72a85 100644
--- a/src/drivers/spi/spi_flash.c
+++ b/src/drivers/spi/spi_flash.c
@@ -234,6 +234,11 @@ out:
return ret;
}
+int spi_flash_cmd_status(struct spi_flash *flash, u8 *reg)
+{
+ return spi_flash_cmd(flash->spi, flash->status_cmd, reg, sizeof(*reg));
+}
+
/*
* The following table holds all device probe functions
*
@@ -372,6 +377,7 @@ flash_detected:
tseg_relocate((void **)&flash->read);
tseg_relocate((void **)&flash->write);
tseg_relocate((void **)&flash->erase);
+ tseg_relocate((void **)&flash->status);
tseg_relocate((void **)&flash->name);
#endif
diff --git a/src/drivers/spi/spi_flash_internal.h b/src/drivers/spi/spi_flash_internal.h
index 6fe6c622b..fec3dcc9c 100644
--- a/src/drivers/spi/spi_flash_internal.h
+++ b/src/drivers/spi/spi_flash_internal.h
@@ -60,6 +60,9 @@ int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout);
/* Erase sectors. */
int spi_flash_cmd_erase(struct spi_flash *flash, u32 offset, size_t len);
+/* Read status register. */
+int spi_flash_cmd_status(struct spi_flash *flash, u8 *reg);
+
/* Manufacturer-specific probe functions */
struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode);
struct spi_flash *spi_flash_probe_amic(struct spi_slave *spi, u8 *idcode);
diff --git a/src/drivers/spi/sst.c b/src/drivers/spi/sst.c
index ecd792d46..aab654c64 100644
--- a/src/drivers/spi/sst.c
+++ b/src/drivers/spi/sst.c
@@ -259,10 +259,12 @@ spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode)
stm->flash.write = sst_write;
stm->flash.erase = spi_flash_cmd_erase;
+ stm->flash.status = spi_flash_cmd_status;
stm->flash.read = spi_flash_cmd_read_fast;
stm->flash.sector_size = SST_SECTOR_SIZE;
stm->flash.size = stm->flash.sector_size * params->nr_sectors;
stm->flash.erase_cmd = CMD_SST_SE;
+ stm->flash.status_cmd = CMD_SST_RDSR;
/* Flash powers up read-only, so clear BP# bits */
sst_unlock(&stm->flash);
diff --git a/src/drivers/spi/winbond.c b/src/drivers/spi/winbond.c
index 18ef10513..c4abc3a24 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;
}