/*
 * Copyright © 2008 Intel Corporation
 *
 * 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 (including the next
 * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *
 */

/** @file util.c
 *
 * Utility functions for the various tools in the reg_dumper directory.
 */

#include <err.h>
#include <pciaccess.h>

#include "reg_dumper.h"

/**
 * Sets up the pI830 for use by common.h-style macros, particularly
 * INREG/OUTERG.
 */
void intel_i830rec_init(I830Ptr pI830)
{
    struct pci_device *dev;
    int err, mmio_bar;
    void *mmio;

    err = pci_system_init();
    if (err != 0) {
	fprintf(stderr, "Couldn't initialize PCI system: %s\n", strerror(err));
	exit(1);
    }

    /* Grab the graphics card */
    dev = pci_device_find_by_slot(0, 0, 2, 0);
    if (dev == NULL)
	errx(1, "Couldn't find graphics card");

    err = pci_device_probe(dev);
    if (err != 0) {
	fprintf(stderr, "Couldn't probe graphics card: %s\n", strerror(err));
	exit(1);
    }

    if (dev->vendor_id != 0x8086)
	errx(1, "Graphics card is non-intel");

    pI830->PciInfo = dev;

    mmio_bar = IS_I9XX(pI830) ? 0 : 1;

    err = pci_device_map_range (dev,
				dev->regions[mmio_bar].base_addr,
				dev->regions[mmio_bar].size,
				PCI_DEV_MAP_FLAG_WRITABLE,
				&mmio);

    if (err != 0) {
	fprintf(stderr, "Couldn't map MMIO region: %s\n", strerror(err));
	exit(1);
    }
    pI830->mmio = mmio;
}