1/*
2	Copyright (C) 2004 - 2006 rt2x00 SourceForge Project
3	<http://rt2x00.serialmonkey.com>
4
5	This program is free software; you can redistribute it and/or modify
6	it under the terms of the GNU General Public License as published by
7	the Free Software Foundation; either version 2 of the License, or
8	(at your option) any later version.
9
10	This program is distributed in the hope that it will be useful,
11	but WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13	GNU General Public License for more details.
14
15	You should have received a copy of the GNU General Public License
16	along with this program; if not, write to the
17	Free Software Foundation, Inc.,
18	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 */
20
21/*
22	Module: eeprom_93cx6
23	Abstract: EEPROM reader datastructures for 93cx6 chipsets.
24	Supported chipsets: 93c46, 93c56 and 93c66.
25 */
26
27/*
28 * EEPROM operation defines.
29 */
30#define PCI_EEPROM_WIDTH_93C46	6
31#define PCI_EEPROM_WIDTH_93C56	8
32#define PCI_EEPROM_WIDTH_93C66	8
33#define PCI_EEPROM_WIDTH_93C86	8
34#define PCI_EEPROM_WIDTH_OPCODE	3
35#define PCI_EEPROM_WRITE_OPCODE	0x05
36#define PCI_EEPROM_ERASE_OPCODE 0x07
37#define PCI_EEPROM_READ_OPCODE	0x06
38#define PCI_EEPROM_EWDS_OPCODE	0x10
39#define PCI_EEPROM_EWEN_OPCODE	0x13
40
41/**
42 * struct eeprom_93cx6 - control structure for setting the commands
43 * for reading the eeprom data.
44 * @data: private pointer for the driver.
45 * @register_read(struct eeprom_93cx6 *eeprom): handler to
46 * read the eeprom register, this function should set all reg_* fields.
47 * @register_write(struct eeprom_93cx6 *eeprom): handler to
48 * write to the eeprom register by using all reg_* fields.
49 * @width: eeprom width, should be one of the PCI_EEPROM_WIDTH_* defines
50 * @drive_data: Set if we're driving the data line.
51 * @reg_data_in: register field to indicate data input
52 * @reg_data_out: register field to indicate data output
53 * @reg_data_clock: register field to set the data clock
54 * @reg_chip_select: register field to set the chip select
55 *
56 * This structure is used for the communication between the driver
57 * and the eeprom_93cx6 handlers for reading the eeprom.
58 */
59struct eeprom_93cx6 {
60	void *data;
61
62	void (*register_read)(struct eeprom_93cx6 *eeprom);
63	void (*register_write)(struct eeprom_93cx6 *eeprom);
64
65	int width;
66
67	char drive_data;
68	char reg_data_in;
69	char reg_data_out;
70	char reg_data_clock;
71	char reg_chip_select;
72};
73
74extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom,
75	const u8 word, u16 *data);
76extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom,
77	const u8 word, __le16 *data, const u16 words);
78
79extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable);
80
81extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom,
82			       u8 addr, u16 data);
83