1/* SPDX-License-Identifier: GPL-2.0 */
2/* drivers/atm/zeprom.h - ZeitNet ZN122x EEPROM (NM93C46) declarations */
3
4/* Written 1995,1996 by Werner Almesberger, EPFL LRC */
5
6
7#ifndef DRIVER_ATM_ZEPROM_H
8#define DRIVER_ATM_ZEPROM_H
9
10/* Different versions use different control registers */
11
12#define ZEPROM_V1_REG	PCI_VENDOR_ID	/* PCI register */
13#define ZEPROM_V2_REG	0x40
14
15/* Bits in control register */
16
17#define ZEPROM_SK	0x80000000	/* strobe (probably on raising edge) */
18#define ZEPROM_CS	0x40000000	/* Chip Select */
19#define ZEPROM_DI	0x20000000	/* Data Input */
20#define ZEPROM_DO	0x10000000	/* Data Output */
21
22#define ZEPROM_SIZE	32		/* 32 bytes */
23#define ZEPROM_V1_ESI_OFF 24		/* ESI offset in EEPROM (V1) */
24#define ZEPROM_V2_ESI_OFF 4		/* ESI offset in EEPROM (V2) */
25
26#define ZEPROM_CMD_LEN	3		/* commands are three bits */
27#define ZEPROM_ADDR_LEN	6		/* addresses are six bits */
28
29/* Commands (3 bits) */
30
31#define ZEPROM_CMD_READ	6
32
33/* No other commands are needed. */
34
35#endif
36