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zeprom.h

/* 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

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