pciconf_ofmethod.c revision 1.1 
1/* $NetBSD: pciconf_ofmethod.c,v 1.1 2007/10/25 16:55:51 garbled 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 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *        This product includes software developed by the NetBSD
21 *        Foundation, Inc. and its contributors.
22 * 4. Neither the name of The NetBSD Foundation nor the names of its
23 *    contributors may be used to endorse or promote products derived
24 *    from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 */
38
39/*
40 * Generic PowerPC functions for talking to a PCI Bridge via the RTAS or
41 * OF methods of the device.
42 */
43
44#include <sys/cdefs.h>
45__KERNEL_RCSID(0, "$NetBSD: pciconf_ofmethod.c,v 1.1 2007/10/25 16:55:51 garbled Exp $");
46
47#include <sys/types.h>
48#include <sys/param.h>
49#include <sys/time.h>
50#include <sys/systm.h>
51#include <sys/errno.h>
52#include <sys/device.h>
53
54#include <uvm/uvm_extern.h>
55
56#define _POWERPC_BUS_DMA_PRIVATE
57#include <machine/bus.h>
58#include <machine/intr.h>
59#include <machine/pio.h>
60#include <dev/ofw/openfirm.h>
61#include <dev/ofw/ofw_pci.h>
62
63#if NISA > 0
64#include <dev/isa/isavar.h>
65#endif
66
67#include <dev/pci/pcivar.h>
68#include <dev/pci/pcireg.h>
69#include <dev/pci/pcidevs.h>
70
71void
72genppc_pci_ofmethod_attach_hook(struct device *parent, struct device *self,
73    struct pcibus_attach_args *pba)
74{
75
76	if (pba->pba_bus != 0)
77		return;
78
79	aprint_normal(": OFW method configuration space access");
80}
81
82pcitag_t
83genppc_pci_ofmethod_make_tag(void *v, int bus, int dev, int func)
84{
85	return ((bus << OFW_PCI_PHYS_HI_BUSSHIFT) & OFW_PCI_PHYS_HI_BUSMASK) |
86	    ((dev << OFW_PCI_PHYS_HI_DEVICESHIFT) & OFW_PCI_PHYS_HI_DEVICEMASK)|
87	    ((func << OFW_PCI_PHYS_HI_FUNCTIONSHIFT) &
88	    OFW_PCI_PHYS_HI_FUNCTIONMASK);
89}
90
91void
92genppc_pci_ofmethod_decompose_tag(void *v, pcitag_t tag, int *bp, int *dp,
93    int *fp)
94{
95
96	if (bp != NULL)
97		*bp = OFW_PCI_PHYS_HI_BUS(tag);
98	if (dp != NULL)
99		*dp = OFW_PCI_PHYS_HI_DEVICE(tag);
100	if (fp != NULL)
101		*fp = OFW_PCI_PHYS_HI_FUNCTION(tag);
102	return;
103}
104
105pcireg_t
106genppc_pci_ofmethod_conf_read(void *v, pcitag_t tag, int reg)
107{
108	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
109	pcireg_t data;
110
111	tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
112	    OFW_PCI_PHYS_HI_FUNCTIONMASK;
113	tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
114	if (OF_call_method("config-l@", pc->pc_ihandle, 1, 1, tag, &data) < 0)
115		return (pcireg_t) -1;
116	/*printf("data=0x%x\n", data); */
117	return data;
118}
119
120void
121genppc_pci_ofmethod_conf_write(void *v, pcitag_t tag, int reg, pcireg_t data)
122{
123	pci_chipset_tag_t pc = (pci_chipset_tag_t)v;
124
125	tag &= OFW_PCI_PHYS_HI_BUSMASK | OFW_PCI_PHYS_HI_DEVICEMASK |
126	    OFW_PCI_PHYS_HI_FUNCTIONMASK;
127	tag |= reg & OFW_PCI_PHYS_HI_REGISTERMASK;
128	OF_call_method("config-l!", pc->pc_ihandle, 2, 0, data, tag);
129}
130