pciconf_ofmethod.c revision 1.2 
1/* $NetBSD: pciconf_ofmethod.c,v 1.2 2008/04/28 20:23:32 martin 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 1.2 2008/04/28 20:23:32 martin Exp $");
39
40#include <sys/types.h>
41#include <sys/param.h>
42#include <sys/time.h>
43#include <sys/systm.h>
44#include <sys/errno.h>
45#include <sys/device.h>
46
47#include <uvm/uvm_extern.h>
48
49#define _POWERPC_BUS_DMA_PRIVATE
50#include <machine/bus.h>
51#include <machine/intr.h>
52#include <machine/pio.h>
53#include <dev/ofw/openfirm.h>
54#include <dev/ofw/ofw_pci.h>
55
56#if NISA > 0
57#include <dev/isa/isavar.h>
58#endif
59
60#include <dev/pci/pcivar.h>
61#include <dev/pci/pcireg.h>
62#include <dev/pci/pcidevs.h>
63
64void
65genppc_pci_ofmethod_attach_hook(struct device *parent, struct device *self,
66    struct pcibus_attach_args *pba)
67{
68
69	if (pba->pba_bus != 0)
70		return;
71
72	aprint_normal(": OFW method configuration space access");
73}
74
75pcitag_t
76genppc_pci_ofmethod_make_tag(void *v, int bus, int dev, int func)
77{
78	return ((bus << OFW_PCI_PHYS_HI_BUSSHIFT) & OFW_PCI_PHYS_HI_BUSMASK) |
79	    ((dev << OFW_PCI_PHYS_HI_DEVICESHIFT) & OFW_PCI_PHYS_HI_DEVICEMASK)|
80	    ((func << OFW_PCI_PHYS_HI_FUNCTIONSHIFT) &
81	    OFW_PCI_PHYS_HI_FUNCTIONMASK);
82}
83
84void
85genppc_pci_ofmethod_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp,
86    int *fp)
87{
88
89	if (bp != NULL)
90		*bp = OFW_PCI_PHYS_HI_BUS(tag);
91	if (dp != NULL)
92		*dp = OFW_PCI_PHYS_HI_DEVICE(tag);
93	if (fp != NULL)
94		*fp = OFW_PCI_PHYS_HI_FUNCTION(tag);
95	return;
96}
97
98pcireg_t
99genppc_pci_ofmethod_conf_read(void *v, pcitag_t tag, int reg)
100{
101	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
102	pcireg_t data;
103
104	tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
105	    OFW_PCI_PHYS_HI_FUNCTIONMASK;
106	tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
107	if (OF_call_method("config-l@", pc->pc_ihandle, 1, 1, tag, &data) < 0)
108		return (pcireg_t) -1;
109	/*printf("data=0x%x\n", data); */
110	return data;
111}
112
113void
114genppc_pci_ofmethod_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
115{
116	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
117
118	tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
119	    OFW_PCI_PHYS_HI_FUNCTIONMASK;
120	tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
121	OF_call_method("config-l!", pc->pc_ihandle, 2, 0, data, tag);
122}
123