hash: Plumb crc8 into the hash functions
Add an entry for crc8, with watchdog handling.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/common/Kconfig b/common/Kconfig
index e8d89bf..0e8c44f 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -845,6 +845,14 @@
and the algorithms it supports are defined in common/hash.c. See
also CMD_HASH for command-line access.
+config HASH_CRC8
+ bool "Make crc8 available via the hash API"
+ depends on HASH && CRC8
+ help
+ Most times, the crc8() function is called directly. To make it also
+ available via the hash API, e.g. in hash_block(), enable this
+ option.
+
config AVB_VERIFY
bool "Build Android Verified Boot operations"
depends on LIBAVB
diff --git a/common/hash.c b/common/hash.c
index db6925d..8dd9da8 100644
--- a/common/hash.c
+++ b/common/hash.c
@@ -304,6 +304,14 @@
.hash_update = hash_update_crc16_ccitt,
.hash_finish = hash_finish_crc16_ccitt,
},
+#if CONFIG_IS_ENABLED(CRC8) && IS_ENABLED(CONFIG_HASH_CRC8)
+ {
+ .name = "crc8",
+ .digest_size = 1,
+ .chunk_size = CHUNKSZ_CRC32,
+ .hash_func_ws = crc8_wd_buf,
+ },
+#endif
#if CONFIG_IS_ENABLED(CRC32)
{
.name = "crc32",
diff --git a/include/u-boot/crc.h b/include/u-boot/crc.h
index 5174bd7..b2badaf 100644
--- a/include/u-boot/crc.h
+++ b/include/u-boot/crc.h
@@ -25,6 +25,9 @@
*/
unsigned int crc8(unsigned int crc_start, const unsigned char *vptr, int len);
+void crc8_wd_buf(const unsigned char *input, unsigned int len,
+ unsigned char output[1], unsigned int chunk_sz);
+
/* lib/crc16.c - 16 bit CRC with polynomial x^16 + x^15 + x^2 + 1 */
uint16_t crc16(uint16_t crc, const unsigned char *buffer, size_t len);
diff --git a/lib/crc8.c b/lib/crc8.c
index 20d46d1..811e199 100644
--- a/lib/crc8.c
+++ b/lib/crc8.c
@@ -32,3 +32,9 @@
return crc;
}
+
+void crc8_wd_buf(const unsigned char *input, unsigned int len,
+ unsigned char output[1], unsigned int chunk_sz)
+{
+ *output = crc8(0, input, len);
+}