1 /****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005 Fen Systems Ltd.
4 * Copyright 2006 Solarflare Communications Inc.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation, incorporated herein by reference.
14 #include "net_driver.h"
16 /**************************************************************************
18 * Basic SPI command set and bit definitions
20 *************************************************************************/
22 #define SPI_WRSR 0x01 /* Write status register */
23 #define SPI_WRITE 0x02 /* Write data to memory array */
24 #define SPI_READ 0x03 /* Read data from memory array */
25 #define SPI_WRDI 0x04 /* Reset write enable latch */
26 #define SPI_RDSR 0x05 /* Read status register */
27 #define SPI_WREN 0x06 /* Set write enable latch */
29 #define SPI_STATUS_WPEN 0x80 /* Write-protect pin enabled */
30 #define SPI_STATUS_BP2 0x10 /* Block protection bit 2 */
31 #define SPI_STATUS_BP1 0x08 /* Block protection bit 1 */
32 #define SPI_STATUS_BP0 0x04 /* Block protection bit 0 */
33 #define SPI_STATUS_WEN 0x02 /* State of the write enable latch */
34 #define SPI_STATUS_NRDY 0x01 /* Device busy flag */
37 * struct efx_spi_device - an Efx SPI (Serial Peripheral Interface) device
38 * @efx: The Efx controller that owns this device
39 * @device_id: Controller's id for the device
40 * @size: Size (in bytes)
41 * @addr_len: Number of address bytes in read/write commands
42 * @munge_address: Flag whether addresses should be munged.
43 * Some devices with 9-bit addresses (e.g. AT25040A EEPROM)
44 * use bit 3 of the command byte as address bit A8, rather
45 * than having a two-byte address. If this flag is set, then
46 * commands should be munged in this way.
47 * @block_size: Write block size (in bytes).
48 * Write commands are limited to blocks with this size and alignment.
49 * @read: Read function for the device
50 * @write: Write function for the device
52 struct efx_spi_device {
56 unsigned int addr_len;
57 unsigned int munge_address:1;
58 unsigned int block_size;
61 int falcon_spi_read(const struct efx_spi_device *spi, loff_t start,
62 size_t len, size_t *retlen, u8 *buffer);
63 int falcon_spi_write(const struct efx_spi_device *spi, loff_t start,
64 size_t len, size_t *retlen, const u8 *buffer);
67 * SFC4000 flash is partitioned into:
68 * 0-0x400 chip and board config (see falcon_hwdefs.h)
69 * 0x400-0x8000 unused (or may contain VPD if EEPROM not present)
70 * 0x8000-end boot code (mapped to PCI expansion ROM)
71 * SFC4000 small EEPROM (size < 0x400) is used for VPD only.
72 * SFC4000 large EEPROM (size >= 0x400) is partitioned into:
73 * 0-0x400 chip and board config
75 * 0x800-0x1800 boot config
76 * Aside from the chip and board config, all of these are optional and may
77 * be absent or truncated depending on the devices used.
79 #define FALCON_NVCONFIG_END 0x400U
80 #define EFX_EEPROM_BOOTCONFIG_START 0x800U
81 #define EFX_EEPROM_BOOTCONFIG_END 0x1800U
83 #endif /* EFX_SPI_H */