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);
78extern void eeprom_93cx6_readb(struct eeprom_93cx6 *eeprom,
79 const u8 byte, u8 *data);
80extern void eeprom_93cx6_multireadb(struct eeprom_93cx6 *eeprom,
81 const u8 byte, u8 *data, const u16 bytes);
82
83extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable);
84
85extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom,
86 u8 addr, u16 data);
87