1/* $NetBSD: pciconf_indirect.c,v 1.4 2011/06/17 19:03:01 matt Exp $ */
2
3/*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Tim Rightnour
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * Generic PowerPC functions for talking to an indirect configuration style
34 * PCI Bridge.
35 */
36
37#include <sys/cdefs.h>
38__KERNEL_RCSID(0, "$NetBSD: pciconf_indirect.c,v 1.4 2011/06/17 19:03:01 matt Exp $");
39
40#define _POWERPC_BUS_DMA_PRIVATE
41
42#include <sys/types.h>
43#include <sys/param.h>
44#include <sys/time.h>
45#include <sys/systm.h>
46#include <sys/errno.h>
47#include <sys/device.h>
48#include <sys/bus.h>
49#include <sys/intr.h>
50
51#include <uvm/uvm_extern.h>
52
53#include <machine/pio.h>
54
55#if NISA > 0
56#include <dev/isa/isavar.h>
57#endif
58
59#include <dev/pci/pcivar.h>
60#include <dev/pci/pcireg.h>
61#include <dev/pci/pcidevs.h>
62
63#define	PCI_MODE1_ENABLE	0x80000000UL
64
65void
66genppc_pci_indirect_attach_hook(device_t parent, device_t self,
67    struct pcibus_attach_args *pba)
68{
69
70	if (pba->pba_bus != 0)
71		return;
72
73	printf(": indirect configuration space access");
74}
75
76pcitag_t
77genppc_pci_indirect_make_tag(void *v, int bus, int device, int function)
78{
79	pcitag_t tag;
80
81	if (bus >= 256 || device >= 32 || function >= 8)
82		panic("pci_make_tag: bad request");
83
84	tag = PCI_MODE1_ENABLE |
85		    (bus << 16) | (device << 11) | (function << 8);
86	return tag;
87}
88
89void
90genppc_pci_indirect_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp,
91    int *fp)
92{
93
94	if (bp != NULL)
95		*bp = (tag >> 16) & 0xff;
96	if (dp != NULL)
97		*dp = (tag >> 11) & 0x1f;
98	if (fp != NULL)
99		*fp = (tag >> 8) & 0x7;
100	return;
101}
102
103pcireg_t
104genppc_pci_indirect_conf_read(void *v, pcitag_t tag, int reg)
105{
106	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
107	pcireg_t data;
108	int s;
109
110	s = splhigh();
111	out32rb(pc->pc_addr, tag | reg);
112	data = in32rb(pc->pc_data);
113	out32rb(pc->pc_addr, 0);
114	splx(s);
115
116	return data;
117}
118
119void
120genppc_pci_indirect_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
121{
122	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
123	int s;
124
125	s = splhigh();
126	out32rb(pc->pc_addr, tag | reg);
127	out32rb(pc->pc_data, data);
128	out32rb(pc->pc_addr, 0);
129	splx(s);
130}
131