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