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/* ----------------------------------------------------------------------- *
*
* Copyright 2005-2007 H. Peter Anvin - All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 53 Temple Place Ste 330,
* Boston MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/*
* ethersel.c
*
* Search for an Ethernet card with a known PCI signature, and run
* the corresponding Ethernet module.
*
* To use this, set up a syslinux config file like this:
*
* PROMPT 0
* DEFAULT ethersel.c32
* # DEV [DID xxxx:yyyy[/mask]] [RID zz-zz] [SID uuuu:vvvv[/mask]] commandline
* # ...
*
* DID = PCI device ID
* RID = Revision ID (range)
* SID = Subsystem ID
*/
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <console.h>
#include <sys/pci.h>
#include <com32.h>
#ifdef DEBUG
# define dprintf printf
#else
# define dprintf(...) ((void)0)
#endif
static const char *
get_config(void)
{
static com32sys_t r;
r.eax.w[0] = 0x000E;
__intcall(0x22, &r, &r);
return MK_PTR(r.es, r.ebx.w[0]);
}
static char *
skipspace(char *p)
{
while ( *p && *p <= ' ' )
p++;
return p;
}
#define MAX_LINE 512
/* Check to see if we are at a certain keyword (case insensitive) */
static int looking_at(const char *line, const char *kwd)
{
const char *p = line;
const char *q = kwd;
while ( *p && *q && ((*p^*q) & ~0x20) == 0 ) {
p++;
q++;
}
if ( *q )
return 0; /* Didn't see the keyword */
return *p <= ' '; /* Must be EOL or whitespace */
}
static char *
get_did(char *p, uint32_t *idptr, uint32_t *maskptr)
{
unsigned long vid, did, m1, m2;
*idptr = -1;
*maskptr = 0xffffffff;
vid = strtoul(p, &p, 16);
if ( *p != ':' )
return p; /* Bogus ID */
did = strtoul(p+1, &p, 16);
*idptr = (did << 16) + vid;
if ( *p == '/' ) {
m1 = strtoul(p+1, &p, 16);
if ( *p != ':' ) {
*maskptr = (m1 << 16) | 0xffff;
} else {
m2 = strtoul(p+1, &p, 16);
*maskptr = (m1 << 16) | m2;
}
}
return p;
}
static char *
get_rid_range(char *p, uint8_t *rid_min, uint8_t *rid_max)
{
unsigned long r0, r1;
p = skipspace(p+3);
r0 = strtoul(p, &p, 16);
if ( *p == '-' ) {
r1 = strtoul(p+1, &p, 16);
} else {
r1 = r0;
}
*rid_min = r0;
*rid_max = r1;
return p;
}
static struct match *
parse_config(const char *filename)
{
char line[MAX_LINE], *p;
FILE *f;
struct match *list = NULL;
struct match **ep = &list;
struct match *m;
if ( !filename )
filename = get_config();
f = fopen(filename, "r");
if ( !f )
return list;
while ( fgets(line, sizeof line, f) ) {
p = skipspace(line);
if ( !looking_at(p, "#") )
continue;
p = skipspace(p+1);
if ( !looking_at(p, "dev") )
continue;
p = skipspace(p+3);
m = malloc(sizeof(struct match));
if ( !m )
continue;
memset(m, 0, sizeof *m);
m->rid_max = 0xff;
for(;;) {
p = skipspace(p);
if ( looking_at(p, "did") ) {
p = get_did(p+3, &m->did, &m->did_mask);
} else if ( looking_at(p, "sid") ) {
p = get_did(p+3, &m->sid, &m->sid_mask);
} else if ( looking_at(p, "rid") ) {
p = get_rid_range(p+3, &m->rid_min, &m->rid_max);
} else {
char *e;
e = strchr(p, '\n');
if ( *e ) *e = '\0';
e = strchr(p, '\r');
if ( *e ) *e = '\0';
m->filename = strdup(p);
if ( !m->filename )
m->did = -1;
break; /* Done with this line */
}
}
dprintf("DEV DID %08x/%08x SID %08x/%08x RID %02x-%02x CMD %s\n",
m->did, m->did_mask, m->sid, m->sid_mask,
m->rid_min, m->rid_max, m->filename);
*ep = m;
ep = &m->next;
}
return list;
}
static void __attribute__((noreturn))
execute(const char *cmdline)
{
static com32sys_t ireg;
strcpy(__com32.cs_bounce, cmdline);
ireg.eax.w[0] = 0x0003; /* Run command */
ireg.ebx.w[0] = OFFS(__com32.cs_bounce);
ireg.es = SEG(__com32.cs_bounce);
__intcall(0x22, &ireg, NULL);
exit(255); /* Shouldn't return */
}
int main(int argc, char *argv[])
{
struct match *list, *match;
struct pci_device_list pci_device_list;
struct pci_bus_list pci_bus_list;
openconsole(&dev_null_r, &dev_stdcon_w);
pci_scan(&pci_bus_list,&pci_device_list);
list = parse_config(argc < 2 ? NULL : argv[1]);
match = find_pci_device(&pci_device_list,list);
if ( match )
execute(match->filename);
/* On error, return to the command line */
fputs("Error: no recognized network card found!\n", stderr);
return 1;
}
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