/* $XFree86: xc/programs/Xserver/hw/xfree86/etc/pcitweak.c,v 1.17 2003/08/24 17:37:01 dawes Exp $ */ /* * Copyright (c) 1999-2002 by The XFree86 Project, Inc. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of the copyright holder(s) * and author(s) shall not be used in advertising or otherwise to promote * the sale, use or other dealings in this Software without prior written * authorization from the copyright holder(s) and author(s). */ /* * pcitweak.c * * Author: David Dawes */ #include #include "os.h" #include "xf86.h" #include "xf86Priv.h" #include "xf86_OSproc.h" #include "xf86Pci.h" #ifdef __CYGWIN__ #include #endif #include #include #ifdef __linux__ /* to get getopt on Linux */ #ifndef __USE_POSIX2 #define __USE_POSIX2 #endif #endif #include #if defined(ISC) || defined(Lynx) extern char *optarg; extern int optind, opterr; #endif pciVideoPtr *xf86PciVideoInfo = NULL; 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[]) { int 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"