102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/* $NetBSD: pci_user.c,v 1.4 2008/12/14 18:46:33 christos Exp $ */
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/*
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* Copyright (c) 1998
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* Matthias Drochner. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "sanamespace.h"
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#include <sys/types.h>
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#include <machine/pio.h>
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#include <pcivar.h>
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extern int mapio(void);
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/*
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* Replacement for i386/stand/lib/biospci.c.
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* Very simple functions to access PCI config space from
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* userland. Works with configuration mode 1 only, can
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* only access bus number 0.
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*/
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#define PCI_MODE1_ENABLE 0x80000000UL
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#define PCI_MODE1_ADDRESS_REG 0x0cf8
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#define PCI_MODE1_DATA_REG 0x0cfc
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static int
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maketag(int bus, int dev, int fcn)
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{
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return PCI_MODE1_ENABLE |
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(bus << 16) | (dev << 11) | (fcn << 8);
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}
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int
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pcicheck(void)
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{
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return mapio() ? -1 : 0;
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}
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int
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pcifinddev(int vid, int did, pcihdl_t *handle)
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{
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int i;
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for (i = 0; i < 32; i++) {
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pcihdl_t h;
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int id;
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h = maketag(0, i, 0);
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pcicfgread(&h, 0, &id);
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if (id == (vid | (did << 16))) {
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*handle = h;
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return 0;
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}
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}
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return -1;
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}
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int
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pcicfgread(pcihdl_t *handle, int off, int *val)
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{
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int data;
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outl(PCI_MODE1_ADDRESS_REG, *handle | off);
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data = inl(PCI_MODE1_DATA_REG);
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outl(PCI_MODE1_ADDRESS_REG, 0);
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*val = data;
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return 0;
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}
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int
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pcicfgwrite(pcihdl_t *handle, int off, int val)
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{
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outl(PCI_MODE1_ADDRESS_REG, *handle | off);
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outl(PCI_MODE1_DATA_REG, val);
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outl(PCI_MODE1_ADDRESS_REG, 0);
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return 0;
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}
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