1 #ifndef ISA_IDS_H 2 #define ISA_IDS_H 3 4 /* 5 * This file defines IDs as used by ISAPnP and EISA devices. These 6 * IDs have the format: 7 * 8 * vendor byte 0 bit 7 must be zero 9 * bits 6-2 first vendor char in compressed ASCII 10 * bits 1-0 second vendor char in compressed ASCII (bits 4-3) 11 * byte 1 bits 7-5 second vendor char in compressed ASCII (bits 2-0) 12 * bits 4-0 third vendor char in compressed ASCII 13 * product byte 0 bits 7-4 first hex digit of product number 14 * bits 3-0 second hex digit of product number 15 * byte 1 bits 7-4 third hex digit of product number 16 * bits 3-0 hex digit of revision level 17 * 18 * ISA IDs are always expressed in little-endian order, even though 19 * the underlying "meaning" is big-endian. 20 */ 21 22 FILE_LICENCE ( GPL2_OR_LATER ); 23 24 #include <byteswap.h> 25 26 /* 27 * Construct a vendor ID from three ASCII characters 28 * 29 */ 30 #define ISA_VENDOR( a, b, c ) \ 31 bswap_16 ( ( ( ( (a) - 'A' + 1 ) & 0x1f ) << 10 ) | \ 32 ( ( ( (b) - 'A' + 1 ) & 0x1f ) << 5 ) | \ 33 ( ( ( (c) - 'A' + 1 ) & 0x1f ) << 0 ) ) 34 35 #define ISAPNP_VENDOR( a, b, c ) ISA_VENDOR ( a, b, c ) 36 #define EISA_VENDOR( a, b, c ) ISA_VENDOR ( a, b, c ) 37 38 #define GENERIC_ISAPNP_VENDOR ISAPNP_VENDOR ( 'P','N','P' ) 39 40 /* 41 * Extract product ID and revision from combined product field 42 * 43 */ 44 #define ISA_PROD_ID_MASK ( 0xf0ff ) 45 #define ISA_PROD_ID(product) ( (product) & ISA_PROD_ID_MASK ) 46 #define ISA_PROD_REV(product) ( ( (product) & ~ISA_PROD_ID_MASK ) >> 8 ) 47 48 /* Functions in isa_ids.c */ 49 extern char * isa_id_string ( unsigned int vendor, unsigned int product ); 50 51 #endif /* ISA_IDS_H */ 52
