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35 lines
984 B
35 lines
984 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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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 control 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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