1/* $NetBSD: pciconf_ofmethod.c,v 1.3 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 Jochen Kunz and 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 a PCI Bridge via the RTAS or
34 * OF methods of the device.
35 */
36
37#include <sys/cdefs.h>
38__KERNEL_RCSID(0, "$NetBSD: pciconf_ofmethod.c,v 1.3 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#include <dev/ofw/openfirm.h>
56#include <dev/ofw/ofw_pci.h>
57
58#if NISA > 0
59#include <dev/isa/isavar.h>
60#endif
61
62#include <dev/pci/pcivar.h>
63#include <dev/pci/pcireg.h>
64#include <dev/pci/pcidevs.h>
65
66void
67genppc_pci_ofmethod_attach_hook(device_t parent, device_t self,
68    struct pcibus_attach_args *pba)
69{
70
71	if (pba->pba_bus != 0)
72		return;
73
74	aprint_normal(": OFW method configuration space access");
75}
76
77pcitag_t
78genppc_pci_ofmethod_make_tag(void *v, int bus, int dev, int func)
79{
80	return ((bus << OFW_PCI_PHYS_HI_BUSSHIFT) & OFW_PCI_PHYS_HI_BUSMASK) |
81	    ((dev << OFW_PCI_PHYS_HI_DEVICESHIFT) & OFW_PCI_PHYS_HI_DEVICEMASK)|
82	    ((func << OFW_PCI_PHYS_HI_FUNCTIONSHIFT) &
83	    OFW_PCI_PHYS_HI_FUNCTIONMASK);
84}
85
86void
87genppc_pci_ofmethod_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp,
88    int *fp)
89{
90
91	if (bp != NULL)
92		*bp = OFW_PCI_PHYS_HI_BUS(tag);
93	if (dp != NULL)
94		*dp = OFW_PCI_PHYS_HI_DEVICE(tag);
95	if (fp != NULL)
96		*fp = OFW_PCI_PHYS_HI_FUNCTION(tag);
97	return;
98}
99
100pcireg_t
101genppc_pci_ofmethod_conf_read(void *v, pcitag_t tag, int reg)
102{
103	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
104	pcireg_t data;
105
106	tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
107	    OFW_PCI_PHYS_HI_FUNCTIONMASK;
108	tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
109	if (OF_call_method("config-l@", pc->pc_ihandle, 1, 1, tag, &data) < 0)
110		return (pcireg_t) -1;
111	/*printf("data=0x%x\n", data); */
112	return data;
113}
114
115void
116genppc_pci_ofmethod_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
117{
118	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
119
120	tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
121	    OFW_PCI_PHYS_HI_FUNCTIONMASK;
122	tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
123	OF_call_method("config-l!", pc->pc_ihandle, 2, 0, data, tag);
124}
125