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/*
* dump gpio on intel ICH series southbridges
*
* Copyright (C) 2008 by coresystems GmbH
* written by Stefan Reinauer <stepan@coresystems.de>
* Copyright (C) 2008 Joseph Smith <joe@smittys.pointclark.net>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <errno.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <getopt.h>
#include <sys/io.h>
#include <pci/pci.h>
int map_gpio(uint16_t gpio)
{
int i;
unsigned long size=0x40;
for (i=0; i<size; i+=4) {
printf("gpiobase+0x%04x: 0x%08x\n", i, inl(gpio+i));
}
return 0;
}
int main(int argc, char *argv[])
{
struct pci_access *pacc;
struct pci_dev *sb;
uint16_t gpiobadd;
uint16_t device;
if (iopl(3)) {
perror("You need to be root.\n");
exit(1);
}
pacc = pci_alloc();
pci_init(pacc);
pci_scan_bus(pacc);
sb = pci_get_dev(pacc, 0, 0, 0x1f, 0);
if (!sb) {
printf("No southbridge found.\n");
exit(1);
}
if (pci_read_word(sb, 0) != 0x8086) {
printf("Not an Intel southbridge.\n");
exit(1);
}
printf("Intel Southbridge: %04x:%04x\n",
pci_read_word(sb, 0), pci_read_word(sb, 2));
device = pci_read_word(sb, 2);
if (device < 0x2640) {
gpiobadd = pci_read_word(sb, 0x58) & 0xfffc;
} else if (device >= 0x2640) {
gpiobadd = pci_read_word(sb, 0x48) & 0xfffc;
}
printf("GPIOBASE = 0x%04x\n\n", gpiobadd);
map_gpio(gpiobadd);
return 0;
}
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