diff options
Diffstat (limited to 'spi.c')
-rw-r--r-- | spi.c | 27 |
1 files changed, 27 insertions, 0 deletions
@@ -673,6 +673,33 @@ int spi_nbyte_read(int address, uint8_t *bytes, int len) return spi_command(sizeof(cmd), len, cmd, bytes); } +/* + * Read a complete flash chip. + * Each page is read separately in chunks with a maximum size of chunksize. + */ +int spi_read_chunked(struct flashchip *flash, uint8_t *buf, int chunksize) +{ + int rc = 0; + int i, j; + int total_size = flash->total_size * 1024; + int page_size = flash->page_size; + int toread; + + for (j = 0; j < total_size / page_size; j++) { + for (i = 0; i < page_size; i += chunksize) { + toread = min(chunksize, page_size - i); + rc = spi_nbyte_read(j * page_size + i, + buf + j * page_size + i, toread); + if (rc) + break; + } + if (rc) + break; + } + + return rc; +} + int spi_chip_read(struct flashchip *flash, uint8_t *buf) { switch (spi_controller) { |