drivers/atm/zeprom.h

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