| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* drivers/atm/zeprom.h - ZeitNet ZN122x EEPROM (NM93C46) declarations */ |
| |
| /* Written 1995,1996 by Werner Almesberger, EPFL LRC */ |
| |
| |
| #ifndef DRIVER_ATM_ZEPROM_H |
| #define DRIVER_ATM_ZEPROM_H |
| |
| /* Different versions use different control registers */ |
| |
| #define ZEPROM_V1_REG PCI_VENDOR_ID /* PCI register */ |
| #define ZEPROM_V2_REG 0x40 |
| |
| /* Bits in contol register */ |
| |
| #define ZEPROM_SK 0x80000000 /* strobe (probably on raising edge) */ |
| #define ZEPROM_CS 0x40000000 /* Chip Select */ |
| #define ZEPROM_DI 0x20000000 /* Data Input */ |
| #define ZEPROM_DO 0x10000000 /* Data Output */ |
| |
| #define ZEPROM_SIZE 32 /* 32 bytes */ |
| #define ZEPROM_V1_ESI_OFF 24 /* ESI offset in EEPROM (V1) */ |
| #define ZEPROM_V2_ESI_OFF 4 /* ESI offset in EEPROM (V2) */ |
| |
| #define ZEPROM_CMD_LEN 3 /* commands are three bits */ |
| #define ZEPROM_ADDR_LEN 6 /* addresses are six bits */ |
| |
| /* Commands (3 bits) */ |
| |
| #define ZEPROM_CMD_READ 6 |
| |
| /* No other commands are needed. */ |
| |
| #endif |
