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sfc: Expose flash region storing boot code as MTD

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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>
This commit is contained in:
Ben Hutchings
2008-11-04 20:34:28 +00:00
committed by Jeff Garzik
parent 0a95f56323
commit f41507245e
9 changed files with 327 additions and 7 deletions
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17
drivers/net/sfc/spi.h
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@@ -25,6 +25,7 @@
#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_SST_EWSR 0x50 /* SST: Enable write to status register */
#define SPI_STATUS_WPEN 0x80 /* Write-protect pin enabled */
#define SPI_STATUS_BP2 0x10 /* Block protection bit 2 */
@@ -36,6 +37,7 @@
/**
* struct efx_spi_device - an Efx SPI (Serial Peripheral Interface) device
* @efx: The Efx controller that owns this device
* @mtd: MTD state
* @device_id: Controller's id for the device
* @size: Size (in bytes)
* @addr_len: Number of address bytes in read/write commands
@@ -44,20 +46,30 @@
* 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.
* @erase_command: Erase command (or 0 if sector erase not needed).
* @erase_size: Erase sector size (in bytes)
* Erase commands affect sectors with this size and alignment.
* This must be a power of two.
* @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
*/
struct efx_spi_device {
struct efx_nic *efx;
#ifdef CONFIG_SFC_MTD
void *mtd;
#endif
int device_id;
unsigned int size;
unsigned int addr_len;
unsigned int munge_address:1;
u8 erase_command;
unsigned int erase_size;
unsigned int block_size;
};
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_fast_wait(const struct efx_spi_device *spi);
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,
@@ -77,6 +89,7 @@ int falcon_spi_write(const struct efx_spi_device *spi, loff_t start,
* be absent or truncated depending on the devices used.
*/
#define FALCON_NVCONFIG_END 0x400U
#define FALCON_FLASH_BOOTCODE_START 0x8000U
#define EFX_EEPROM_BOOTCONFIG_START 0x800U
#define EFX_EEPROM_BOOTCONFIG_END 0x1800U