sfc: Export boot configuration in EEPROM through ethtool

Extend the SPI device setup code to support this.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 42 insertions, 47 deletions

diff --git a/drivers/net/sfc/spi.h b/drivers/net/sfc/spi.h
index 34412f3d41c..feef6194237 100644
--- a/drivers/net/sfc/spi.h
+++ b/drivers/net/sfc/spi.h
@@ -19,53 +19,48 @@
  *
  *************************************************************************/
 
-/*
- * Commands common to all known devices.
- *
+#define SPI_WRSR 0x01		/* Write status register */
+#define SPI_WRITE 0x02		/* Write data to memory array */
+#define SPI_READ 0x03		/* Read data from memory array */
+#define SPI_WRDI 0x04		/* Reset write enable latch */
+#define SPI_RDSR 0x05		/* Read status register */
+#define SPI_WREN 0x06		/* Set write enable latch */
+
+#define SPI_STATUS_WPEN 0x80	/* Write-protect pin enabled */
+#define SPI_STATUS_BP2 0x10	/* Block protection bit 2 */
+#define SPI_STATUS_BP1 0x08	/* Block protection bit 1 */
+#define SPI_STATUS_BP0 0x04	/* Block protection bit 0 */
+#define SPI_STATUS_WEN 0x02	/* State of the write enable latch */
+#define SPI_STATUS_NRDY 0x01	/* Device busy flag */
+
+/**
+ * struct efx_spi_device - an Efx SPI (Serial Peripheral Interface) device
+ * @efx:		The Efx controller that owns this device
+ * @device_id:		Controller's id for the device
+ * @size:		Size (in bytes)
+ * @addr_len:		Number of address bytes in read/write commands
+ * @munge_address:	Flag whether addresses should be munged.
+ *	Some devices with 9-bit addresses (e.g. AT25040A EEPROM)
+ *	use bit 3 of the command byte as address bit A8, rather
+ *	than having a two-byte address.  If this flag is set, then
+ *	commands should be munged in this way.
+ * @block_size:		Write block size (in bytes).
+ *	Write commands are limited to blocks with this size and alignment.
+ * @read:		Read function for the device
+ * @write:		Write function for the device
  */
-
-/* Write status register */
-#define SPI_WRSR 0x01
-
-/* Write data to memory array */
-#define SPI_WRITE 0x02
-
-/* Read data from memory array */
-#define SPI_READ 0x03
-
-/* Reset write enable latch */
-#define SPI_WRDI 0x04
-
-/* Read status register */
-#define SPI_RDSR 0x05
-
-/* Set write enable latch */
-#define SPI_WREN 0x06
-
-/* SST: Enable write to status register */
-#define SPI_SST_EWSR 0x50
-
-/*
- * Status register bits.  Not all bits are supported on all devices.
- *
- */
-
-/* Write-protect pin enabled */
-#define SPI_STATUS_WPEN 0x80
-
-/* Block protection bit 2 */
-#define SPI_STATUS_BP2 0x10
-
-/* Block protection bit 1 */
-#define SPI_STATUS_BP1 0x08
-
-/* Block protection bit 0 */
-#define SPI_STATUS_BP0 0x04
-
-/* State of the write enable latch */
-#define SPI_STATUS_WEN 0x02
-
-/* Device busy flag */
-#define SPI_STATUS_NRDY 0x01
+struct efx_spi_device {
+	struct efx_nic *efx;
+	int device_id;
+	unsigned int size;
+	unsigned int addr_len;
+	unsigned int munge_address:1;
+	unsigned int block_size;
+};
+
+int falcon_spi_read(const struct efx_spi_device *spi, loff_t start,
+		    size_t len, size_t *retlen, u8 *buffer);
+int falcon_spi_write(const struct efx_spi_device *spi, loff_t start,
+		     size_t len, size_t *retlen, const u8 *buffer);
 
 #endif /* EFX_SPI_H */