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-rw-r--r--src/drivers/spi/spi_flash.c26
-rw-r--r--src/include/spi-generic.h4
-rw-r--r--src/include/spi_flash.h5
3 files changed, 35 insertions, 0 deletions
diff --git a/src/drivers/spi/spi_flash.c b/src/drivers/spi/spi_flash.c
index 2dd616bb65..1b00078d5d 100644
--- a/src/drivers/spi/spi_flash.c
+++ b/src/drivers/spi/spi_flash.c
@@ -459,3 +459,29 @@ void lb_spi_flash(struct lb_header *header)
flash->erase_cmd = CMD_BLOCK_ERASE;
}
}
+
+
+int spi_flash_ctrlr_protect_region(const struct spi_flash *flash,
+ const struct region *region)
+{
+ const struct spi_ctrlr *ctrlr;
+ struct region flash_region = { 0 };
+
+ if (!flash)
+ return -1;
+
+ flash_region.size = flash->size;
+
+ if (!region_is_subregion(&flash_region, region))
+ return -1;
+
+ ctrlr = flash->spi.ctrlr;
+
+ if (!ctrlr)
+ return -1;
+
+ if (ctrlr->flash_protect)
+ return ctrlr->flash_protect(flash, region);
+
+ return -1;
+}
diff --git a/src/include/spi-generic.h b/src/include/spi-generic.h
index 783df0b917..a3298f8376 100644
--- a/src/include/spi-generic.h
+++ b/src/include/spi-generic.h
@@ -16,6 +16,7 @@
#ifndef _SPI_GENERIC_H_
#define _SPI_GENERIC_H_
+#include <commonlib/region.h>
#include <stdint.h>
#include <stddef.h>
@@ -115,6 +116,7 @@ struct spi_flash;
*
* flash_probe: Specialized probe function provided by SPI flash
* controllers.
+ * flash_protect: Protect a region of flash using the SPI flash controller.
*/
struct spi_ctrlr {
int (*claim_bus)(const struct spi_slave *slave);
@@ -128,6 +130,8 @@ struct spi_ctrlr {
bool deduct_cmd_len;
int (*flash_probe)(const struct spi_slave *slave,
struct spi_flash *flash);
+ int (*flash_protect)(const struct spi_flash *flash,
+ const struct region *region);
};
/*-----------------------------------------------------------------------
diff --git a/src/include/spi_flash.h b/src/include/spi_flash.h
index e9ea50c4d2..3a6df9ab1f 100644
--- a/src/include/spi_flash.h
+++ b/src/include/spi_flash.h
@@ -120,4 +120,9 @@ int chipset_volatile_group_end(const struct spi_flash *flash);
* if CONFIG_BOOT_DEVICE_SPI_FLASH is enabled. */
const struct spi_flash *boot_device_spi_flash(void);
+/* Protect a region of spi flash using its controller, if available. Returns
+ * < 0 on error, else 0 on success. */
+int spi_flash_ctrlr_protect_region(const struct spi_flash *flash,
+ const struct region *region);
+
#endif /* _SPI_FLASH_H_ */