pci_machdep.c revision 1.13 
1/*	$NetBSD: pci_machdep.c,v 1.13 2003/07/15 01:29:23 lukem Exp $	*/
2
3/*
4 * Copyright (c) 2000 Soren S. Jorvang.  All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions, and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__KERNEL_RCSID(0, "$NetBSD: pci_machdep.c,v 1.13 2003/07/15 01:29:23 lukem Exp $");
30
31#include <sys/types.h>
32#include <sys/param.h>
33#include <sys/time.h>
34#include <sys/systm.h>
35#include <sys/errno.h>
36#include <sys/device.h>
37
38#define _COBALT_BUS_DMA_PRIVATE
39#include <machine/bus.h>
40#include <machine/intr.h>
41#include <machine/intr_machdep.h>
42
43#include <dev/pci/pcivar.h>
44#include <dev/pci/pcireg.h>
45#include <dev/pci/pcidevs.h>
46
47/*
48 * PCI doesn't have any special needs; just use
49 * the generic versions of these functions.
50 */
51struct cobalt_bus_dma_tag pci_bus_dma_tag = {
52	_bus_dmamap_create,
53	_bus_dmamap_destroy,
54	_bus_dmamap_load,
55	_bus_dmamap_load_mbuf,
56	_bus_dmamap_load_uio,
57	_bus_dmamap_load_raw,
58	_bus_dmamap_unload,
59	_bus_dmamap_sync,
60	_bus_dmamem_alloc,
61	_bus_dmamem_free,
62	_bus_dmamem_map,
63	_bus_dmamem_unmap,
64	_bus_dmamem_mmap,
65};
66
67void
68pci_attach_hook(parent, self, pba)
69	struct device *parent, *self;
70	struct pcibus_attach_args *pba;
71{
72	/* XXX */
73
74	return;
75}
76
77int
78pci_bus_maxdevs(pc, busno)
79	pci_chipset_tag_t pc;
80	int busno;
81{
82	return 32;
83}
84
85pcitag_t
86pci_make_tag(pc, bus, device, function)
87	pci_chipset_tag_t pc;
88	int bus, device, function;
89{
90	return (bus << 16) | (device << 11) | (function << 8);
91}
92
93void
94pci_decompose_tag(pc, tag, bp, dp, fp)
95	pci_chipset_tag_t pc;
96	pcitag_t tag;
97	int *bp, *dp, *fp;
98{
99	if (bp != NULL)
100		*bp = (tag >> 16) & 0xff;
101	if (dp != NULL)
102		*dp = (tag >> 11) & 0x1f;
103	if (fp != NULL)
104		*fp = (tag >> 8) & 0x07;
105}
106
107#define PCI_CFG_ADDR	((volatile u_int32_t *)MIPS_PHYS_TO_KSEG1(0x14000cf8))
108#define PCI_CFG_DATA	((volatile u_int32_t *)MIPS_PHYS_TO_KSEG1(0x14000cfc))
109
110pcireg_t
111pci_conf_read(pc, tag, reg)
112	pci_chipset_tag_t pc;
113	pcitag_t tag;
114	int reg;
115{
116	pcireg_t data;
117	int bus, dev, func;
118
119	pci_decompose_tag(pc, tag, &bus, &dev, &func);
120
121	/*
122	 * 2700 hardware wedges on accesses to device 6.
123	 */
124	if (bus == 0 && dev == 6)
125		return 0;
126	/*
127	 * 2800 hardware wedges on accesses to device 31.
128	 */
129	if (bus == 0 && dev == 31)
130		return 0;
131
132	*PCI_CFG_ADDR = 0x80000000 | tag | reg;
133	data = *PCI_CFG_DATA;
134	*PCI_CFG_ADDR = 0;
135
136	return data;
137}
138
139void
140pci_conf_write(pc, tag, reg, data)
141	pci_chipset_tag_t pc;
142	pcitag_t tag;
143	int reg;
144	pcireg_t data;
145{
146	*PCI_CFG_ADDR = 0x80000000 | tag | reg;
147	*PCI_CFG_DATA = data;
148	*PCI_CFG_ADDR = 0;
149
150	return;
151}
152
153int
154pci_intr_map(pa, ihp)
155	struct pci_attach_args *pa;
156	pci_intr_handle_t *ihp;
157{
158	pci_chipset_tag_t pc = pa->pa_pc;
159	pcitag_t intrtag = pa->pa_intrtag;
160	int pin = pa->pa_intrpin;
161	int line = pa->pa_intrline;
162	int bus, dev, func;
163
164	pci_decompose_tag(pc, intrtag, &bus, &dev, &func);
165
166	/*
167	 * The interrupt lines of the two Tulips are connected
168	 * directly to the CPU.
169	 */
170
171	if (bus == 0 && dev == 7 && pin == PCI_INTERRUPT_PIN_A)
172		*ihp = 16 + 1;
173	else if (bus == 0 && dev == 12 && pin == PCI_INTERRUPT_PIN_A)
174		*ihp = 16 + 2;
175	else
176		*ihp = line;
177
178	return 0;
179}
180
181const char *
182pci_intr_string(pc, ih)
183	pci_chipset_tag_t pc;
184	pci_intr_handle_t ih;
185{
186	static char irqstr[8];
187
188	if (ih >= 16)
189		sprintf(irqstr, "level %d", ih - 16);
190	else
191		sprintf(irqstr, "irq %d", ih);
192
193	return irqstr;
194}
195
196const struct evcnt *
197pci_intr_evcnt(pc, ih)
198	pci_chipset_tag_t pc;
199	pci_intr_handle_t ih;
200{
201
202	/* XXX for now, no evcnt parent reported */
203	return NULL;
204}
205
206void *
207pci_intr_establish(pc, ih, level, func, arg)
208	pci_chipset_tag_t pc;
209	pci_intr_handle_t ih;
210	int level, (*func)(void *);
211	void *arg;
212{
213	if (ih >= 16)
214		return cpu_intr_establish(ih - 16, level, func, arg);
215	else
216		return icu_intr_establish(ih, IST_LEVEL, level, func, arg);
217}
218
219void
220pci_intr_disestablish(pc, cookie)
221	pci_chipset_tag_t pc;
222	void *cookie;
223{
224	/* Try both, only the valid one will disestablish. */
225	cpu_intr_disestablish(cookie);
226	icu_intr_disestablish(cookie);
227}
228