/* 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