1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
2 | /* |
3 | Copyright (C) 2004 - 2006 rt2x00 SourceForge Project |
4 | <http://rt2x00.serialmonkey.com> |
5 | |
6 | */ |
7 | |
8 | /* |
9 | Module: eeprom_93cx6 |
10 | Abstract: EEPROM reader datastructures for 93cx6 chipsets. |
11 | Supported chipsets: 93c46, 93c56 and 93c66. |
12 | */ |
13 | |
14 | /* |
15 | * EEPROM operation defines. |
16 | */ |
17 | #define PCI_EEPROM_WIDTH_93C46 6 |
18 | #define PCI_EEPROM_WIDTH_93C56 8 |
19 | #define PCI_EEPROM_WIDTH_93C66 8 |
20 | #define PCI_EEPROM_WIDTH_93C86 8 |
21 | #define PCI_EEPROM_WIDTH_OPCODE 3 |
22 | #define PCI_EEPROM_WRITE_OPCODE 0x05 |
23 | #define PCI_EEPROM_ERASE_OPCODE 0x07 |
24 | #define PCI_EEPROM_READ_OPCODE 0x06 |
25 | #define PCI_EEPROM_EWDS_OPCODE 0x10 |
26 | #define PCI_EEPROM_EWEN_OPCODE 0x13 |
27 | |
28 | /** |
29 | * struct eeprom_93cx6 - control structure for setting the commands |
30 | * for reading the eeprom data. |
31 | * @data: private pointer for the driver. |
32 | * @register_read(struct eeprom_93cx6 *eeprom): handler to |
33 | * read the eeprom register, this function should set all reg_* fields. |
34 | * @register_write(struct eeprom_93cx6 *eeprom): handler to |
35 | * write to the eeprom register by using all reg_* fields. |
36 | * @width: eeprom width, should be one of the PCI_EEPROM_WIDTH_* defines |
37 | * @drive_data: Set if we're driving the data line. |
38 | * @reg_data_in: register field to indicate data input |
39 | * @reg_data_out: register field to indicate data output |
40 | * @reg_data_clock: register field to set the data clock |
41 | * @reg_chip_select: register field to set the chip select |
42 | * |
43 | * This structure is used for the communication between the driver |
44 | * and the eeprom_93cx6 handlers for reading the eeprom. |
45 | */ |
46 | struct eeprom_93cx6 { |
47 | void *data; |
48 | |
49 | void (*register_read)(struct eeprom_93cx6 *eeprom); |
50 | void (*register_write)(struct eeprom_93cx6 *eeprom); |
51 | |
52 | int width; |
53 | |
54 | char drive_data; |
55 | char reg_data_in; |
56 | char reg_data_out; |
57 | char reg_data_clock; |
58 | char reg_chip_select; |
59 | }; |
60 | |
61 | extern void eeprom_93cx6_read(struct eeprom_93cx6 *eeprom, |
62 | const u8 word, u16 *data); |
63 | extern void eeprom_93cx6_multiread(struct eeprom_93cx6 *eeprom, |
64 | const u8 word, __le16 *data, const u16 words); |
65 | extern void eeprom_93cx6_readb(struct eeprom_93cx6 *eeprom, |
66 | const u8 byte, u8 *data); |
67 | extern void eeprom_93cx6_multireadb(struct eeprom_93cx6 *eeprom, |
68 | const u8 byte, u8 *data, const u16 bytes); |
69 | |
70 | extern void eeprom_93cx6_wren(struct eeprom_93cx6 *eeprom, bool enable); |
71 | |
72 | extern void eeprom_93cx6_write(struct eeprom_93cx6 *eeprom, |
73 | u8 addr, u16 data); |
74 | |