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/*
* pcitweak.c
*
* Copyright 1999 by The XFree86 Project, Inc.
*
* Author: David Dawes <dawes@xfree86.org>
*/
/* $XFree86: xc/programs/Xserver/hw/xfree86/etc/pcitweak.c,v 1.14 2000/08/10 17:40:34 dawes Exp $ */
#include "X.h"
#include "os.h"
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSproc.h"
#include "xf86Pci.h"
#ifdef __CYGWIN__
#include <getopt.h>
#endif
#include <stdarg.h>
#include <stdlib.h>
#ifdef __linux__
/* to get getopt on Linux */
#ifndef __USE_POSIX2
#define __USE_POSIX2
#endif
#endif
#include <unistd.h>
#if defined(ISC) || defined(Lynx)
extern char *optarg;
extern int optind, opterr;
#endif
static void usage(void);
static Bool parsePciBusString(const char *id, int *bus, int *device, int *func);
static char *myname = NULL;
int
main(int argc, char *argv[])
{
char c;
PCITAG tag;
int bus, device, func;
Bool list = FALSE, rd = FALSE, wr = FALSE;
Bool byte = FALSE, halfword = FALSE;
int offset = 0;
CARD32 value = 0;
char *id = NULL, *end;
myname = argv[0];
while ((c = getopt(argc, argv, "bhlr:w:")) != -1) {
switch (c) {
case 'b':
byte = TRUE;
break;
case 'h':
halfword = TRUE;
break;
case 'l':
list = TRUE;
break;
case 'r':
rd = TRUE;
id = optarg;
break;
case 'w':
wr = TRUE;
id = optarg;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (list) {
xf86Verbose = 2;
xf86EnableIO();
xf86scanpci(0);
xf86DisableIO();
exit(0);
}
if (rd && wr)
usage();
if (wr && argc != 2)
usage();
if (rd && argc != 1)
usage();
if (byte && halfword)
usage();
if (rd || wr) {
if (!parsePciBusString(id, &bus, &device, &func)) {
fprintf(stderr, "%s: Bad PCI ID string\n", myname);
usage();
}
offset = strtoul(argv[0], &end, 0);
if (*end != '\0') {
fprintf(stderr, "%s: Bad offset\n", myname);
usage();
}
if (halfword) {
if (offset % 2) {
fprintf(stderr, "%s: offset must be a multiple of two\n",
myname);
exit(1);
}
} else if (!byte) {
if (offset % 4) {
fprintf(stderr, "%s: offset must be a multiple of four\n",
myname);
exit(1);
}
}
} else {
usage();
}
if (wr) {
value = strtoul(argv[1], &end, 0);
if (*end != '\0') {
fprintf(stderr, "%s: Bad value\n", myname);
usage();
}
}
xf86EnableIO();
/*
* This is needed to setup all the buses. Otherwise secondary buses
* can't be accessed.
*/
xf86scanpci(0);
tag = pciTag(bus, device, func);
if (rd) {
if (byte) {
printf("0x%02x\n", (unsigned int)pciReadByte(tag, offset) & 0xFF);
} else if (halfword) {
printf("0x%04x\n", (unsigned int)pciReadWord(tag, offset) & 0xFFFF);
} else {
printf("0x%08lx\n", (unsigned long)pciReadLong(tag, offset));
}
} else if (wr) {
if (byte) {
pciWriteByte(tag, offset, value & 0xFF);
} else if (halfword) {
pciWriteWord(tag, offset, value & 0xFFFF);
} else {
pciWriteLong(tag, offset, value);
}
}
xf86DisableIO();
exit(0);
}
static void
usage()
{
fprintf(stderr, "usage:\tpcitweak -l\n"
"\tpcitweak -r ID [-b | -h] offset\n"
"\tpcitweak -w ID [-b | -h] offset value\n"
"\n"
"\t\t-l -- list\n"
"\t\t-r -- read\n"
"\t\t-w -- write\n"
"\t\t-b -- read/write a single byte\n"
"\t\t-h -- read/write a single halfword (16 bit)\n"
"\t\tID -- PCI ID string in form bus:dev:func "
"(all in hex)\n");
exit(1);
}
Bool
parsePciBusString(const char *busID, int *bus, int *device, int *func)
{
/*
* The format is assumed to be "bus:device:func", where bus, device
* and func are hexadecimal integers. func may be omitted and assumed to
* be zero, although it doing this isn't encouraged.
*/
char *p, *s, *end;
s = strdup(busID);
p = strtok(s, ":");
if (p == NULL || *p == 0)
return FALSE;
*bus = strtoul(p, &end, 16);
if (*end != '\0')
return FALSE;
p = strtok(NULL, ":");
if (p == NULL || *p == 0)
return FALSE;
*device = strtoul(p, &end, 16);
if (*end != '\0')
return FALSE;
*func = 0;
p = strtok(NULL, ":");
if (p == NULL || *p == 0)
return TRUE;
*func = strtoul(p, &end, 16);
if (*end != '\0')
return FALSE;
return TRUE;
}
#include "xf86getpagesize.c"
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