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