520d9c36af
ISA 3c509 is currently non-functional, although the EISA (3c509-eisa) and MCA (3c529) variants should build OK. None of this code is yet tested.
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
#ifndef ISA_IDS_H
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#define ISA_IDS_H
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/*
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* This file defines IDs as used by ISAPnP and EISA devices. These
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* IDs have the format:
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*
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* vendor byte 0 bit 7 must be zero
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* bits 6-2 first vendor char in compressed ASCII
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* bits 1-0 second vendor char in compressed ASCII (bits 4-3)
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* byte 1 bits 7-5 second vendor char in compressed ASCII (bits 2-0)
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* bits 4-0 third vendor char in compressed ASCII
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* product byte 0 bits 7-4 first hex digit of product number
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* bits 3-0 second hex digit of product number
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* byte 1 bits 7-4 third hex digit of product number
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* bits 3-0 hex digit of revision level
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*
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* ISA IDs are always expressed in little-endian order, even though
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* the underlying "meaning" is big-endian.
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*/
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#include <byteswap.h>
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/*
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* Construct a vendor ID from three ASCII characters
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*
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*/
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#define ISA_VENDOR( a, b, c ) \
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bswap_16 ( ( ( ( (a) - 'A' + 1 ) & 0x1f ) << 10 ) | \
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( ( ( (b) - 'A' + 1 ) & 0x1f ) << 5 ) | \
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( ( ( (c) - 'A' + 1 ) & 0x1f ) << 0 ) )
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#define ISAPNP_VENDOR( a, b, c ) ISA_VENDOR ( a, b, c )
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#define EISA_VENDOR( a, b, c ) ISA_VENDOR ( a, b, c )
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#define GENERIC_ISAPNP_VENDOR ISAPNP_VENDOR ( 'P','N','P' )
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/*
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* Extract product ID and revision from combined product field
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*
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*/
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#define ISA_PROD_ID_MASK ( 0xf0ff )
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#define ISA_PROD_ID(product) ( (product) & ISA_PROD_ID_MASK )
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#define ISA_PROD_REV(product) ( ( (product) & ~ISA_PROD_ID_MASK ) >> 8 )
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/* Functions in isa_ids.c */
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extern char * isa_id_string ( unsigned int vendor, unsigned int product );
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#endif /* ISA_IDS_H */
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