diff options
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/spi/spi_flash.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/src/drivers/spi/spi_flash.c b/src/drivers/spi/spi_flash.c index 1b00078d5d..93335de24a 100644 --- a/src/drivers/spi/spi_flash.c +++ b/src/drivers/spi/spi_flash.c @@ -113,6 +113,34 @@ static int spi_flash_cmd_read_array(const struct spi_slave *spi, u8 *cmd, return spi_flash_cmd_read(spi, cmd, cmd_len, data, len); } +/* Perform the read operation honoring spi controller fifo size, reissuing + * the read command until the full request completed. */ +static int spi_flash_cmd_read_array_wrapped(const struct spi_slave *spi, + u8 *cmd, size_t cmd_len, u32 offset, + size_t len, void *buf) +{ + int ret; + size_t xfer_len; + uint8_t *data = buf; + + while (len) { + xfer_len = spi_crop_chunk(spi, cmd_len, len); + + /* Perform the read. */ + ret = spi_flash_cmd_read_array(spi, cmd, cmd_len, + offset, xfer_len, data); + + if (ret) + return ret; + + offset += xfer_len; + data += xfer_len; + len -= xfer_len; + } + + return 0; +} + int spi_flash_cmd_read_fast(const struct spi_flash *flash, u32 offset, size_t len, void *data) { @@ -121,7 +149,7 @@ int spi_flash_cmd_read_fast(const struct spi_flash *flash, u32 offset, cmd[0] = CMD_READ_ARRAY_FAST; cmd[4] = 0x00; - return spi_flash_cmd_read_array(&flash->spi, cmd, sizeof(cmd), + return spi_flash_cmd_read_array_wrapped(&flash->spi, cmd, sizeof(cmd), offset, len, data); } @@ -131,7 +159,7 @@ int spi_flash_cmd_read_slow(const struct spi_flash *flash, u32 offset, u8 cmd[4]; cmd[0] = CMD_READ_ARRAY_SLOW; - return spi_flash_cmd_read_array(&flash->spi, cmd, sizeof(cmd), + return spi_flash_cmd_read_array_wrapped(&flash->spi, cmd, sizeof(cmd), offset, len, data); } |