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/****************************************************************************
* Driver for Solarflare Solarstorm network controllers and boards
* Copyright 2005 Fen Systems Ltd.
* Copyright 2006 Solarflare Communications Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#ifndef EFX_SPI_H
#define EFX_SPI_H
#include "net_driver.h"
/**************************************************************************
*
* Basic SPI command set and bit definitions
*
*************************************************************************/
#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
*/
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 */
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