sf: Add SPI NOR protection mechanism

[oweals/u-boot.git] / include / spi_flash.h

diff --git a/include/spi_flash.h b/include/spi_flash.h
index 4312d3d691e6e6c6e3b6b24d2b0e080760a9b44d..0ae0062d12f5efbd2bfc132e2061c2342254e9e2 100644 (file)
--- a/include/spi_flash.h
+++ b/include/spi_flash.h
@@ -54,6 +54,9 @@ struct spi_slave;
  * @write_cmd:         Write cmd - page and quad program.
  * @dummy_byte:                Dummy cycles for read operation.
  * @memory_map:                Address of read-only SPI flash access
+ * @flash_lock:                lock a region of the SPI Flash
+ * @flash_unlock:      unlock a region of the SPI Flash
+ * @flash_is_locked:   check if a region of the SPI Flash is completely locked
  * @read:              Flash read ops: Read len bytes at offset into buf
  *                     Supported cmds: Fast Array Read
  * @write:             Flash write ops: Write len bytes from buf into offset
@@ -87,6 +90,10 @@ struct spi_flash {
        u8 dummy_byte;
 
        void *memory_map;
+
+       int (*flash_lock)(struct spi_flash *flash, u32 ofs, size_t len);
+       int (*flash_unlock)(struct spi_flash *flash, u32 ofs, size_t len);
+       int (*flash_is_locked)(struct spi_flash *flash, u32 ofs, size_t len);
 #ifndef CONFIG_DM_SPI_FLASH
        /*
         * These are not strictly needed for driver model, but keep them here
@@ -227,6 +234,18 @@ static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
 }
 #endif
 
+static inline int spi_flash_protect(struct spi_flash *flash, u32 ofs, u32 len,
+                                       bool prot)
+{
+       if (!flash->flash_lock)
+               return -EOPNOTSUPP;
+
+       if (prot)
+               return flash->flash_lock(flash, ofs, len);
+       else
+               return flash->flash_unlock(flash, ofs, len);
+}
+
 void spi_boot(void) __noreturn;
 void spi_spl_load_image(uint32_t offs, unsigned int size, void *vdst);