Root/drivers/atm/zeprom.h

1/* drivers/atm/zeprom.h - ZeitNet ZN122x EEPROM (NM93C46) declarations */
2
3/* Written 1995,1996 by Werner Almesberger, EPFL LRC */
4
5
6#ifndef DRIVER_ATM_ZEPROM_H
7#define DRIVER_ATM_ZEPROM_H
8
9/* Different versions use different control registers */
10
11#define ZEPROM_V1_REG PCI_VENDOR_ID /* PCI register */
12#define ZEPROM_V2_REG 0x40
13
14/* Bits in contol register */
15
16#define ZEPROM_SK 0x80000000 /* strobe (probably on raising edge) */
17#define ZEPROM_CS 0x40000000 /* Chip Select */
18#define ZEPROM_DI 0x20000000 /* Data Input */
19#define ZEPROM_DO 0x10000000 /* Data Output */
20
21#define ZEPROM_SIZE 32 /* 32 bytes */
22#define ZEPROM_V1_ESI_OFF 24 /* ESI offset in EEPROM (V1) */
23#define ZEPROM_V2_ESI_OFF 4 /* ESI offset in EEPROM (V2) */
24
25#define ZEPROM_CMD_LEN 3 /* commands are three bits */
26#define ZEPROM_ADDR_LEN 6 /* addresses are six bits */
27
28/* Commands (3 bits) */
29
30#define ZEPROM_CMD_READ 6
31
32/* No other commands are needed. */
33
34#endif
35

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