4a5b504d0c
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>
67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/****************************************************************************
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* Driver for Solarflare Solarstorm network controllers and boards
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* Copyright 2005 Fen Systems Ltd.
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* Copyright 2006 Solarflare Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, incorporated herein by reference.
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*/
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#ifndef EFX_SPI_H
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#define EFX_SPI_H
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#include "net_driver.h"
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/**************************************************************************
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*
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* Basic SPI command set and bit definitions
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*
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*************************************************************************/
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#define SPI_WRSR 0x01 /* Write status register */
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#define SPI_WRITE 0x02 /* Write data to memory array */
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#define SPI_READ 0x03 /* Read data from memory array */
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#define SPI_WRDI 0x04 /* Reset write enable latch */
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#define SPI_RDSR 0x05 /* Read status register */
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#define SPI_WREN 0x06 /* Set write enable latch */
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#define SPI_STATUS_WPEN 0x80 /* Write-protect pin enabled */
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#define SPI_STATUS_BP2 0x10 /* Block protection bit 2 */
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#define SPI_STATUS_BP1 0x08 /* Block protection bit 1 */
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#define SPI_STATUS_BP0 0x04 /* Block protection bit 0 */
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#define SPI_STATUS_WEN 0x02 /* State of the write enable latch */
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#define SPI_STATUS_NRDY 0x01 /* Device busy flag */
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/**
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* struct efx_spi_device - an Efx SPI (Serial Peripheral Interface) device
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* @efx: The Efx controller that owns this device
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* @device_id: Controller's id for the device
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* @size: Size (in bytes)
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* @addr_len: Number of address bytes in read/write commands
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* @munge_address: Flag whether addresses should be munged.
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* Some devices with 9-bit addresses (e.g. AT25040A EEPROM)
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* use bit 3 of the command byte as address bit A8, rather
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* than having a two-byte address. If this flag is set, then
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* commands should be munged in this way.
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* @block_size: Write block size (in bytes).
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* Write commands are limited to blocks with this size and alignment.
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* @read: Read function for the device
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* @write: Write function for the device
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*/
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struct efx_spi_device {
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struct efx_nic *efx;
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int device_id;
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unsigned int size;
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unsigned int addr_len;
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unsigned int munge_address:1;
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unsigned int block_size;
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};
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int falcon_spi_read(const struct efx_spi_device *spi, loff_t start,
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size_t len, size_t *retlen, u8 *buffer);
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int falcon_spi_write(const struct efx_spi_device *spi, loff_t start,
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size_t len, size_t *retlen, const u8 *buffer);
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#endif /* EFX_SPI_H */
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