[efi] Implement the EFI_PXE_BASE_CODE_PROTOCOL
[ipxe.git] / src / drivers / bus / isa_ids.c
1 #include <stdint.h>
2 #include <stdio.h>
3 #include <byteswap.h>
4 #include <ipxe/isa_ids.h>
5
6 /*
7 * EISA and ISAPnP IDs are actually mildly human readable, though in a
8 * somewhat brain-damaged way.
9 *
10 */
11 char * isa_id_string ( unsigned int vendor, unsigned int product ) {
12 static char buf[7];
13 int i;
14
15 /* Vendor ID is a compressed ASCII string */
16 vendor = bswap_16 ( vendor );
17 for ( i = 2 ; i >= 0 ; i-- ) {
18 buf[i] = ( 'A' - 1 + ( vendor & 0x1f ) );
19 vendor >>= 5;
20 }
21
22 /* Product ID is a 4-digit hex string */
23 sprintf ( &buf[3], "%04x", bswap_16 ( product ) );
24
25 return buf;
26 }