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Diffstat (limited to 'board/cr50/usb_spi.c')
| -rw-r--r-- | board/cr50/usb_spi.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/board/cr50/usb_spi.c b/board/cr50/usb_spi.c index 6876272297..4aede92f19 100644 --- a/board/cr50/usb_spi.c +++ b/board/cr50/usb_spi.c @@ -683,6 +683,26 @@ int usb_spi_sha256_start(struct sha256_ctx *ctx) return EC_SUCCESS; } +int usb_spi_read_buffer(void *buf, unsigned int offset, size_t bytes) +{ + uint8_t *p = buf; + + while (bytes) { + const int this_chunk = MIN(bytes, SPI_HASH_CHUNK_SIZE); + + /* Read the data */ + if (spi_read_chunk(p, offset, this_chunk) != EC_SUCCESS) { + CPRINTS("%s: read error at 0x%x", __func__, offset); + return VENDOR_RC_READ_FLASH_FAIL; + } + + bytes -= this_chunk; + offset += this_chunk; + p += this_chunk; + } + return EC_SUCCESS; +} + int usb_spi_sha256_update(struct sha256_ctx *ctx, uint32_t offset, uint32_t size) { |