static int
efx_spi_unlock(struct efx_nic *efx, const struct efx_spi_device *spi)
{
const u8 unlock_mask = (SPI_STATUS_BP2 | SPI_STATUS_BP1 |
SPI_STATUS_BP0);
u8 status;
int rc;
rc = falcon_spi_cmd(efx, spi, SPI_RDSR, -1, NULL,
&status, sizeof(status));
if (rc)
return rc;
if (!(status & unlock_mask))
return 0; /* already unlocked */
rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
if (rc)
return rc;
rc = falcon_spi_cmd(efx, spi, SPI_SST_EWSR, -1, NULL, NULL, 0);
if (rc)
return rc;
status &= ~unlock_mask;
rc = falcon_spi_cmd(efx, spi, SPI_WRSR, -1, &status,
NULL, sizeof(status));
if (rc)
return rc;
rc = falcon_spi_wait_write(efx, spi);
if (rc)
return rc;
return 0;
}
int
falcon_spi_write(struct efx_nic *efx, const struct efx_spi_device *spi,
loff_t start, size_t len, size_t *retlen, const u8 *buffer)
{
u8 verify_buffer[FALCON_SPI_MAX_LEN];
size_t block_len, pos = 0;
unsigned int command;
int rc = 0;
while (pos < len) {
rc = falcon_spi_cmd(efx, spi, SPI_WREN, -1, NULL, NULL, 0);
if (rc)
break;
block_len = min(len - pos,
falcon_spi_write_limit(spi, start + pos));
command = efx_spi_munge_command(spi, SPI_WRITE, start + pos);
rc = falcon_spi_cmd(efx, spi, command, start + pos,
buffer + pos, NULL, block_len);
if (rc)
break;
rc = falcon_spi_wait_write(efx, spi);
if (rc)
break;
command = efx_spi_munge_command(spi, SPI_READ, start + pos);
rc = falcon_spi_cmd(efx, spi, command, start + pos,
NULL, verify_buffer, block_len);
if (memcmp(verify_buffer, buffer + pos, block_len)) {
rc = -EIO;
break;
}
pos += block_len;
cond_resched();
if (signal_pending(current)) {
rc = -EINTR;
break;
}
}
if (retlen)
*retlen = pos;
return rc;
}
