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#ifndef ISA_IDS_H
#define ISA_IDS_H
/*
* This file defines IDs as used by ISAPnP and EISA devices. These
* IDs have the format:
*
* vendor byte 0 bit 7 must be zero
* bits 6-2 first vendor char in compressed ASCII
* bits 1-0 second vendor char in compressed ASCII (bits 4-3)
* byte 1 bits 7-5 second vendor char in compressed ASCII (bits 2-0)
* bits 4-0 third vendor char in compressed ASCII
* product byte 0 bits 7-4 first hex digit of product number
* bits 3-0 second hex digit of product number
* byte 1 bits 7-4 third hex digit of product number
* bits 3-0 hex digit of revision level
*
* ISA IDs are always expressed in little-endian order, even though
* the underlying "meaning" is big-endian.
*/
FILE_LICENCE ( GPL2_OR_LATER );
#include <byteswap.h>
/*
* Construct a vendor ID from three ASCII characters
*
*/
#define ISA_VENDOR( a, b, c ) \
bswap_16 ( ( ( ( (a) - 'A' + 1 ) & 0x1f ) << 10 ) | \
( ( ( (b) - 'A' + 1 ) & 0x1f ) << 5 ) | \
( ( ( (c) - 'A' + 1 ) & 0x1f ) << 0 ) )
#define ISAPNP_VENDOR( a, b, c ) ISA_VENDOR ( a, b, c )
#define EISA_VENDOR( a, b, c ) ISA_VENDOR ( a, b, c )
#define GENERIC_ISAPNP_VENDOR ISAPNP_VENDOR ( 'P','N','P' )
/*
* Extract product ID and revision from combined product field
*
*/
#define ISA_PROD_ID_MASK ( 0xf0ff )
#define ISA_PROD_ID(product) ( (product) & ISA_PROD_ID_MASK )
#define ISA_PROD_REV(product) ( ( (product) & ~ISA_PROD_ID_MASK ) >> 8 )
/* Functions in isa_ids.c */
extern char * isa_id_string ( unsigned int vendor, unsigned int product );
#endif /* ISA_IDS_H */
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