pci_machdep.c revision 1.16 
1/*	$NetBSD: pci_machdep.c,v 1.16 2004/08/28 13:33:31 tsutsui 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 1.16 2004/08/28 13:33:31 tsutsui 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
42#include <dev/pci/pcivar.h>
43#include <dev/pci/pcireg.h>
44#include <dev/pci/pcidevs.h>
45
46#include <cobalt/dev/gtreg.h>
47
48/*
49 * PCI doesn't have any special needs; just use
50 * the generic versions of these functions.
51 */
52struct cobalt_bus_dma_tag pci_bus_dma_tag = {
53	_bus_dmamap_create,
54	_bus_dmamap_destroy,
55	_bus_dmamap_load,
56	_bus_dmamap_load_mbuf,
57	_bus_dmamap_load_uio,
58	_bus_dmamap_load_raw,
59	_bus_dmamap_unload,
60	_bus_dmamap_sync,
61	_bus_dmamem_alloc,
62	_bus_dmamem_free,
63	_bus_dmamem_map,
64	_bus_dmamem_unmap,
65	_bus_dmamem_mmap,
66};
67
68void
69pci_attach_hook(parent, self, pba)
70	struct device *parent, *self;
71	struct pcibus_attach_args *pba;
72{
73	/* XXX */
74
75	return;
76}
77
78int
79pci_bus_maxdevs(pc, busno)
80	pci_chipset_tag_t pc;
81	int busno;
82{
83	return 32;
84}
85
86pcitag_t
87pci_make_tag(pc, bus, device, function)
88	pci_chipset_tag_t pc;
89	int bus, device, function;
90{
91	return (bus << 16) | (device << 11) | (function << 8);
92}
93
94void
95pci_decompose_tag(pc, tag, bp, dp, fp)
96	pci_chipset_tag_t pc;
97	pcitag_t tag;
98	int *bp, *dp, *fp;
99{
100	if (bp != NULL)
101		*bp = (tag >> 16) & 0xff;
102	if (dp != NULL)
103		*dp = (tag >> 11) & 0x1f;
104	if (fp != NULL)
105		*fp = (tag >> 8) & 0x07;
106}
107
108pcireg_t
109pci_conf_read(pc, tag, reg)
110	pci_chipset_tag_t pc;
111	pcitag_t tag;
112	int reg;
113{
114	pcireg_t data;
115	int bus, dev, func;
116
117	pci_decompose_tag(pc, tag, &bus, &dev, &func);
118
119	/*
120	 * 2700 hardware wedges on accesses to device 6.
121	 */
122	if (bus == 0 && dev == 6)
123		return 0;
124	/*
125	 * 2800 hardware wedges on accesses to device 31.
126	 */
127	if (bus == 0 && dev == 31)
128		return 0;
129
130	bus_space_write_4(pc->pc_bst, pc->pc_bsh, GT_PCICFG_ADDR,
131	    0x80000000 | tag | reg);
132	data = bus_space_read_4(pc->pc_bst, pc->pc_bsh, GT_PCICFG_DATA);
133	bus_space_write_4(pc->pc_bst, pc->pc_bsh, GT_PCICFG_ADDR, 0);
134
135	return data;
136}
137
138void
139pci_conf_write(pc, tag, reg, data)
140	pci_chipset_tag_t pc;
141	pcitag_t tag;
142	int reg;
143	pcireg_t data;
144{
145
146	bus_space_write_4(pc->pc_bst, pc->pc_bsh, GT_PCICFG_ADDR,
147	    0x80000000 | tag | reg);
148	bus_space_write_4(pc->pc_bst, pc->pc_bsh, GT_PCICFG_DATA, data);
149	bus_space_write_4(pc->pc_bst, pc->pc_bsh, GT_PCICFG_ADDR, 0);
150}
151
152int
153pci_intr_map(pa, ihp)
154	struct pci_attach_args *pa;
155	pci_intr_handle_t *ihp;
156{
157	pci_chipset_tag_t pc = pa->pa_pc;
158	pcitag_t intrtag = pa->pa_intrtag;
159	int pin = pa->pa_intrpin;
160	int line = pa->pa_intrline;
161	int bus, dev, func;
162
163	pci_decompose_tag(pc, intrtag, &bus, &dev, &func);
164
165	/*
166	 * The interrupt lines of the two Tulips are connected
167	 * directly to the CPU.
168	 */
169
170	if (bus == 0 && dev == 7 && pin == PCI_INTERRUPT_PIN_A)
171		*ihp = 16 + 1;
172	else if (bus == 0 && dev == 12 && pin == PCI_INTERRUPT_PIN_A)
173		*ihp = 16 + 2;
174	else
175		*ihp = line;
176
177	return 0;
178}
179
180const char *
181pci_intr_string(pc, ih)
182	pci_chipset_tag_t pc;
183	pci_intr_handle_t ih;
184{
185	static char irqstr[8];
186
187	if (ih >= 16)
188		sprintf(irqstr, "level %d", ih - 16);
189	else
190		sprintf(irqstr, "irq %d", ih);
191
192	return irqstr;
193}
194
195const struct evcnt *
196pci_intr_evcnt(pc, ih)
197	pci_chipset_tag_t pc;
198	pci_intr_handle_t ih;
199{
200
201	/* XXX for now, no evcnt parent reported */
202	return NULL;
203}
204
205void *
206pci_intr_establish(pc, ih, level, func, arg)
207	pci_chipset_tag_t pc;
208	pci_intr_handle_t ih;
209	int level, (*func)(void *);
210	void *arg;
211{
212	if (ih >= 16)
213		return cpu_intr_establish(ih - 16, level, func, arg);
214	else
215		return icu_intr_establish(ih, IST_LEVEL, level, func, arg);
216}
217
218void
219pci_intr_disestablish(pc, cookie)
220	pci_chipset_tag_t pc;
221	void *cookie;
222{
223	/* Try both, only the valid one will disestablish. */
224	cpu_intr_disestablish(cookie);
225	icu_intr_disestablish(cookie);
226}
227