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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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