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