1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* drivers/atm/zeprom.h - ZeitNet ZN122x EEPROM (NM93C46) declarations */ 3*4882a593Smuzhiyun 4*4882a593Smuzhiyun /* Written 1995,1996 by Werner Almesberger, EPFL LRC */ 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #ifndef DRIVER_ATM_ZEPROM_H 8*4882a593Smuzhiyun #define DRIVER_ATM_ZEPROM_H 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun /* Different versions use different control registers */ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #define ZEPROM_V1_REG PCI_VENDOR_ID /* PCI register */ 13*4882a593Smuzhiyun #define ZEPROM_V2_REG 0x40 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun /* Bits in contol register */ 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun #define ZEPROM_SK 0x80000000 /* strobe (probably on raising edge) */ 18*4882a593Smuzhiyun #define ZEPROM_CS 0x40000000 /* Chip Select */ 19*4882a593Smuzhiyun #define ZEPROM_DI 0x20000000 /* Data Input */ 20*4882a593Smuzhiyun #define ZEPROM_DO 0x10000000 /* Data Output */ 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun #define ZEPROM_SIZE 32 /* 32 bytes */ 23*4882a593Smuzhiyun #define ZEPROM_V1_ESI_OFF 24 /* ESI offset in EEPROM (V1) */ 24*4882a593Smuzhiyun #define ZEPROM_V2_ESI_OFF 4 /* ESI offset in EEPROM (V2) */ 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun #define ZEPROM_CMD_LEN 3 /* commands are three bits */ 27*4882a593Smuzhiyun #define ZEPROM_ADDR_LEN 6 /* addresses are six bits */ 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun /* Commands (3 bits) */ 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun #define ZEPROM_CMD_READ 6 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun /* No other commands are needed. */ 34*4882a593Smuzhiyun 35*4882a593Smuzhiyun #endif 36