tjh.dev
Linux kernel mirror (for testing)
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linux
1/****************************************************************************
2 * Driver for Solarflare Solarstorm network controllers and boards
3 * Copyright 2005 Fen Systems Ltd.
4 * Copyright 2006 Solarflare Communications Inc.
5 *
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.
9 */
10
11#ifndef EFX_SPI_H
12#define EFX_SPI_H
13
14#include "net_driver.h"
15
16/**************************************************************************
17 *
18 * Basic SPI command set and bit definitions
19 *
20 *************************************************************************/
21
22/*
23 * Commands common to all known devices.
24 *
25 */
26
27/* Write status register */
28#define SPI_WRSR 0x01
29
30/* Write data to memory array */
31#define SPI_WRITE 0x02
32
33/* Read data from memory array */
34#define SPI_READ 0x03
35
36/* Reset write enable latch */
37#define SPI_WRDI 0x04
38
39/* Read status register */
40#define SPI_RDSR 0x05
41
42/* Set write enable latch */
43#define SPI_WREN 0x06
44
45/* SST: Enable write to status register */
46#define SPI_SST_EWSR 0x50
47
48/*
49 * Status register bits. Not all bits are supported on all devices.
50 *
51 */
52
53/* Write-protect pin enabled */
54#define SPI_STATUS_WPEN 0x80
55
56/* Block protection bit 2 */
57#define SPI_STATUS_BP2 0x10
58
59/* Block protection bit 1 */
60#define SPI_STATUS_BP1 0x08
61
62/* Block protection bit 0 */
63#define SPI_STATUS_BP0 0x04
64
65/* State of the write enable latch */
66#define SPI_STATUS_WEN 0x02
67
68/* Device busy flag */
69#define SPI_STATUS_NRDY 0x01
70
71#endif /* EFX_SPI_H */