diff options
| -rw-r--r-- | cmd/i2c.c | 2 | ||||
| -rw-r--r-- | include/u-boot/crc.h | 75 | ||||
| -rw-r--r-- | lib/crc32.c | 4 | ||||
| -rw-r--r-- | tools/envcrc.c | 4 |
4 files changed, 73 insertions, 12 deletions
@@ -768,7 +768,7 @@ static int do_i2c_crc (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[] #endif if (ret) err++; - crc = crc32 (crc, &byte, 1); + crc = crc32(crc, &byte, 1); addr++; } if (err > 0) diff --git a/include/u-boot/crc.h b/include/u-boot/crc.h index b42bcda2b3..1086d2168c 100644 --- a/include/u-boot/crc.h +++ b/include/u-boot/crc.h @@ -38,9 +38,47 @@ void crc16_ccitt_wd_buf(const uint8_t *in, uint len, uint8_t *out, uint chunk_sz); /* lib/crc32.c */ -uint32_t crc32 (uint32_t, const unsigned char *, uint); -uint32_t crc32_wd (uint32_t, const unsigned char *, uint, uint); -uint32_t crc32_no_comp (uint32_t, const unsigned char *, uint); + +/** + * crc32 - Calculate the CRC32 for a block of data + * + * @crc: Input crc to chain from a previous calculution (use 0 to start a new + * calculation) + * @buf: Bytes to checksum + * @len: Number of bytes to checksum + * @return checksum value + */ +uint32_t crc32(uint32_t crc, const unsigned char *buf, uint len); + +/** + * crc32_wd - Calculate the CRC32 for a block of data (watchdog version) + * + * This checksums the data @chunk_sz bytes at a time, calling WATCHDOG_RESET() + * after each chunk, to prevent the watchdog from firing. + * + * @crc: Input crc to chain from a previous calculution (use 0 to start a new + * calculation) + * @buf: Bytes to checksum + * @len: Number of bytes to checksum + * @chunk_sz: Chunk size to use between watchdog resets + * @return checksum + */ +uint32_t crc32_wd(uint32_t crc, const unsigned char *buf, uint len, + uint chunk_sz); + +/** + * crc32_no_comp - Calculate the CRC32 for a block of data (no one's compliment) + * + * This version uses a different algorithm which doesn't use one's compliment. + * JFFS2 (and other things?) use this. + * + * @crc: Input crc to chain from a previous calculution (use 0 to start a new + * calculation) + * @buf: Bytes to checksum + * @len: Number of bytes to checksum + * @return checksum value + */ +uint32_t crc32_no_comp(uint32_t crc, const unsigned char *buf, uint len); /** * crc32_wd_buf - Perform CRC32 on a buffer and return result in buffer @@ -50,11 +88,34 @@ uint32_t crc32_no_comp (uint32_t, const unsigned char *, uint); * @output: Place to put checksum result (4 bytes) * @chunk_sz: Trigger watchdog after processing this many bytes */ -void crc32_wd_buf(const unsigned char *input, uint ilen, - unsigned char *output, uint chunk_sz); +void crc32_wd_buf(const uint8_t *input, uint ilen, uint8_t *output, + uint chunk_sz); /* lib/crc32c.c */ -void crc32c_init(uint32_t *, uint32_t); -uint32_t crc32c_cal(uint32_t, const char *, int, uint32_t *); + +/** + * crc32c_init() - Set up a the CRC32 table + * + * This sets up 256-item table to aid in CRC32 calculation + * + * @crc32c_table: Place to put table + * @pol: polynomial to use + */ +void crc32c_init(uint32_t *crc32c_table, uint32_t pol); + +/** + * crc32c_cal() - Perform CRC32 on a buffer given a table + * + * This algorithm uses the table (set up by crc32c_init() to speed up + * processing. + * + * @crc: Previous crc (use 0 at start) + * @data: Data bytes to checksum + * @length: Number of bytes to process + * @crc32c_table:: CRC table + * @return checksum value + */ +uint32_t crc32c_cal(uint32_t crc, const char *data, int length, + uint32_t *crc32c_table); #endif /* _UBOOT_CRC_H */ diff --git a/lib/crc32.c b/lib/crc32.c index eee21f8d73..dc7e183f18 100644 --- a/lib/crc32.c +++ b/lib/crc32.c @@ -244,12 +244,12 @@ uint32_t crc32_wd(uint32_t crc, const unsigned char *buf, uInt len, chunk = end - curr; if (chunk > chunk_sz) chunk = chunk_sz; - crc = crc32 (crc, curr, chunk); + crc = crc32(crc, curr, chunk); curr += chunk; WATCHDOG_RESET (); } #else - crc = crc32 (crc, buf, len); + crc = crc32(crc, buf, len); #endif return crc; diff --git a/tools/envcrc.c b/tools/envcrc.c index 4b3b828af0..6e43608027 100644 --- a/tools/envcrc.c +++ b/tools/envcrc.c @@ -58,7 +58,7 @@ extern unsigned int env_size; extern env_t embedded_environment; #endif /* CONFIG_BUILD_ENVCRC */ -extern uint32_t crc32 (uint32_t, const unsigned char *, unsigned int); +extern uint32_t crc32(uint32_t, const unsigned char *, unsigned int); int main (int argc, char **argv) { @@ -88,7 +88,7 @@ int main (int argc, char **argv) memset(dataptr + eoe, pad, datasize - eoe); } - crc = crc32 (0, dataptr, datasize); + crc = crc32(0, dataptr, datasize); /* Check if verbose mode is activated passing a parameter to the program */ if (argc > 1) { |