diff options
Diffstat (limited to 'src/drivers/spi/spi_flash.c')
| -rw-r--r-- | src/drivers/spi/spi_flash.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/drivers/spi/spi_flash.c b/src/drivers/spi/spi_flash.c index f0f119addb..9cb10855fa 100644 --- a/src/drivers/spi/spi_flash.c +++ b/src/drivers/spi/spi_flash.c @@ -519,3 +519,51 @@ int spi_flash_ctrlr_protect_region(const struct spi_flash *flash, return -1; } + +int spi_flash_vector_helper(const struct spi_slave *slave, + struct spi_op vectors[], size_t count, + int (*func)(const struct spi_slave *slave, const void *dout, + size_t bytesout, void *din, size_t bytesin)) +{ + int ret; + void *din; + size_t bytes_in; + + if (count < 1 || count > 2) + return -1; + + /* SPI flash commands always have a command first... */ + if (!vectors[0].dout || !vectors[0].bytesout) + return -1; + /* And not read any data during the command. */ + if (vectors[0].din || vectors[0].bytesin) + return -1; + + if (count == 2) { + /* If response bytes requested ensure the buffer is valid. */ + if (vectors[1].bytesin && !vectors[1].din) + return -1; + /* No sends can accompany a receive. */ + if (vectors[1].dout || vectors[1].bytesout) + return -1; + din = vectors[1].din; + bytes_in = vectors[1].bytesin; + } else { + din = NULL; + bytes_in = 0; + } + + ret = func(slave, vectors[0].dout, vectors[0].bytesout, din, bytes_in); + + if (ret) { + vectors[0].status = SPI_OP_FAILURE; + if (count == 2) + vectors[1].status = SPI_OP_FAILURE; + } else { + vectors[0].status = SPI_OP_SUCCESS; + if (count == 2) + vectors[1].status = SPI_OP_SUCCESS; + } + + return ret; +} |