sfc: Expose flash region storing boot code as MTD
The boot code that appears as a PCI expansion ROM on the SFC4000 is
stored in flash. Expose this as a standard MTD device to allow for
in-place upgrades.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 3f74cef..71e0bed 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -1628,9 +1628,9 @@
}
}
-static int falcon_spi_cmd(const struct efx_spi_device *spi,
- unsigned int command, int address,
- const void *in, void *out, unsigned int len)
+int falcon_spi_cmd(const struct efx_spi_device *spi,
+ unsigned int command, int address,
+ const void *in, void *out, unsigned int len)
{
struct efx_nic *efx = spi->efx;
bool addressed = (address >= 0);
@@ -1641,6 +1641,7 @@
/* Input validation */
if (len > FALCON_SPI_MAX_LEN)
return -EINVAL;
+ BUG_ON(!mutex_is_locked(&efx->spi_lock));
/* Check SPI not currently being accessed */
rc = falcon_spi_wait(efx);
@@ -1699,8 +1700,7 @@
return command | (((address >> 8) & spi->munge_address) << 3);
}
-
-static int falcon_spi_fast_wait(const struct efx_spi_device *spi)
+int falcon_spi_fast_wait(const struct efx_spi_device *spi)
{
u8 status;
int i, rc;
@@ -2259,7 +2259,9 @@
nvconfig = region + NVCONFIG_OFFSET;
spi = efx->spi_flash ? efx->spi_flash : efx->spi_eeprom;
+ mutex_lock(&efx->spi_lock);
rc = falcon_spi_read(spi, 0, FALCON_NVCONFIG_END, NULL, region);
+ mutex_unlock(&efx->spi_lock);
if (rc) {
EFX_ERR(efx, "Failed to read %s\n",
efx->spi_flash ? "flash" : "EEPROM");
@@ -2555,6 +2557,11 @@
SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ADDR_LEN);
spi_device->munge_address = (spi_device->size == 1 << 9 &&
spi_device->addr_len == 1);
+ spi_device->erase_command =
+ SPI_DEV_TYPE_FIELD(device_type, SPI_DEV_TYPE_ERASE_CMD);
+ spi_device->erase_size =
+ 1 << SPI_DEV_TYPE_FIELD(device_type,
+ SPI_DEV_TYPE_ERASE_SIZE);
spi_device->block_size =
1 << SPI_DEV_TYPE_FIELD(device_type,
SPI_DEV_TYPE_BLOCK_SIZE);