| 1 | /* |
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| 2 | * Generic HDLC support routines for Linux |
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| 3 | * |
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| 4 | * Copyright (C) 1999-2003 Krzysztof Halasa <khc@pm.waw.pl> |
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| 5 | * |
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| 6 | * This program is free software; you can redistribute it and/or modify it |
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| 7 | * under the terms of version 2 of the GNU General Public License |
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| 8 | * as published by the Free Software Foundation. |
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| 9 | */ |
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| 10 | |
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| 11 | #ifndef __HDLC_H |
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| 12 | #define __HDLC_H |
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| 13 | |
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| 14 | #define GENERIC_HDLC_VERSION 4 /* For synchronization with sethdlc utility */ |
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| 15 | |
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| 16 | #define CLOCK_DEFAULT 0 /* Default setting */ |
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| 17 | #define CLOCK_EXT 1 /* External TX and RX clock - DTE */ |
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| 18 | #define CLOCK_INT 2 /* Internal TX and RX clock - DCE */ |
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| 19 | #define CLOCK_TXINT 3 /* Internal TX and external RX clock */ |
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| 20 | #define CLOCK_TXFROMRX 4 /* TX clock derived from external RX clock */ |
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| 21 | |
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| 22 | |
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| 23 | #define ENCODING_DEFAULT 0 /* Default setting */ |
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| 24 | #define ENCODING_NRZ 1 |
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| 25 | #define ENCODING_NRZI 2 |
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| 26 | #define ENCODING_FM_MARK 3 |
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| 27 | #define ENCODING_FM_SPACE 4 |
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| 28 | #define ENCODING_MANCHESTER 5 |
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| 29 | |
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| 30 | |
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| 31 | #define PARITY_DEFAULT 0 /* Default setting */ |
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| 32 | #define PARITY_NONE 1 /* No parity */ |
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| 33 | #define PARITY_CRC16_PR0 2 /* CRC16, initial value 0x0000 */ |
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| 34 | #define PARITY_CRC16_PR1 3 /* CRC16, initial value 0xFFFF */ |
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| 35 | #define PARITY_CRC16_PR0_CCITT 4 /* CRC16, initial 0x0000, ITU-T version */ |
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| 36 | #define PARITY_CRC16_PR1_CCITT 5 /* CRC16, initial 0xFFFF, ITU-T version */ |
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| 37 | #define PARITY_CRC32_PR0_CCITT 6 /* CRC32, initial value 0x00000000 */ |
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| 38 | #define PARITY_CRC32_PR1_CCITT 7 /* CRC32, initial value 0xFFFFFFFF */ |
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| 39 | |
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| 40 | #define LMI_DEFAULT 0 /* Default setting */ |
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| 41 | #define LMI_NONE 1 /* No LMI, all PVCs are static */ |
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| 42 | #define LMI_ANSI 2 /* ANSI Annex D */ |
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| 43 | #define LMI_CCITT 3 /* ITU-T Annex A */ |
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| 44 | |
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| 45 | #define HDLC_MAX_MTU 1500 /* Ethernet 1500 bytes */ |
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| 46 | #define HDLC_MAX_MRU (HDLC_MAX_MTU + 10 + 14 + 4) /* for ETH+VLAN over FR */ |
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| 47 | |
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| 48 | #endif /* __HDLC_H */ |
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