vga_pci.c revision 155186 
1/*-
2 * Copyright (c) 2005 John Baldwin <jhb@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the author nor the names of any co-contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31__FBSDID("$FreeBSD: head/sys/dev/pci/vga_pci.c 155186 2006-02-01 15:45:29Z jhb $");
32
33/*
34 * Simple driver for PCI VGA display devices.  Drivers such as agp(4) and
35 * drm(4) should attach as children of this device.
36 *
37 * XXX: The vgapci name is a hack until we somehow merge the isa vga driver
38 * in or rename it.
39 */
40
41#include <sys/param.h>
42#include <sys/bus.h>
43#include <sys/kernel.h>
44#include <sys/module.h>
45
46#include <dev/pci/pcireg.h>
47#include <dev/pci/pcivar.h>
48
49static int
50vga_pci_probe(device_t dev)
51{
52
53	switch (pci_get_class(dev)) {
54	case PCIC_DISPLAY:
55		break;
56	case PCIC_OLD:
57		if (pci_get_subclass(dev) != PCIS_OLD_VGA)
58			return (ENXIO);
59		break;
60	default:
61		return (ENXIO);
62	}
63	device_set_desc(dev, "VGA-compatible display");
64	return (BUS_PROBE_GENERIC);
65}
66
67static int
68vga_pci_attach(device_t dev)
69{
70
71	bus_generic_probe(dev);
72
73	/* Always create a drm child for now to make it easier on drm. */
74	device_add_child(dev, "drm", -1);
75	bus_generic_attach(dev);
76	return (0);
77}
78
79static int
80vga_pci_suspend(device_t dev)
81{
82
83	return (bus_generic_suspend(dev));
84}
85
86static int
87vga_pci_resume(device_t dev)
88{
89
90	return (bus_generic_resume(dev));
91}
92
93/* Bus interface. */
94
95static int
96vga_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
97{
98
99	return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result));
100}
101
102static int
103vga_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
104{
105
106	return (EINVAL);
107}
108
109static struct resource *
110vga_pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
111    u_long start, u_long end, u_long count, u_int flags)
112{
113
114	return (bus_alloc_resource(dev, type, rid, start, end, count, flags));
115}
116
117static int
118vga_pci_release_resource(device_t dev, device_t child, int type, int rid,
119    struct resource *r)
120{
121
122	return (bus_release_resource(dev, type, rid, r));
123}
124
125/* PCI interface. */
126
127static uint32_t
128vga_pci_read_config(device_t dev, device_t child, int reg, int width)
129{
130
131	return (pci_read_config(dev, reg, width));
132}
133
134static void
135vga_pci_write_config(device_t dev, device_t child, int reg,
136    uint32_t val, int width)
137{
138
139	pci_write_config(dev, reg, val, width);
140}
141
142static int
143vga_pci_enable_busmaster(device_t dev, device_t child)
144{
145
146	device_printf(dev, "child %s requested pci_enable_busmaster\n",
147	    device_get_nameunit(child));
148	return (pci_enable_busmaster(dev));
149}
150
151static int
152vga_pci_disable_busmaster(device_t dev, device_t child)
153{
154
155	device_printf(dev, "child %s requested pci_disable_busmaster\n",
156	    device_get_nameunit(child));
157	return (pci_disable_busmaster(dev));
158}
159
160static int
161vga_pci_enable_io(device_t dev, device_t child, int space)
162{
163
164	device_printf(dev, "child %s requested pci_enable_io\n",
165	    device_get_nameunit(child));
166	return (pci_enable_io(dev, space));
167}
168
169static int
170vga_pci_disable_io(device_t dev, device_t child, int space)
171{
172
173	device_printf(dev, "child %s requested pci_disable_io\n",
174	    device_get_nameunit(child));
175	return (pci_disable_io(dev, space));
176}
177
178static int
179vga_pci_set_powerstate(device_t dev, device_t child, int state)
180{
181
182	device_printf(dev, "child %s requested pci_set_powerstate\n",
183	    device_get_nameunit(child));
184	return (pci_set_powerstate(dev, state));
185}
186
187static int
188vga_pci_get_powerstate(device_t dev, device_t child)
189{
190
191	device_printf(dev, "child %s requested pci_get_powerstate\n",
192	    device_get_nameunit(child));
193	return (pci_get_powerstate(dev));
194}
195
196static int
197vga_pci_assign_interrupt(device_t dev, device_t child)
198{
199
200	device_printf(dev, "child %s requested pci_assign_interrupt\n",
201	    device_get_nameunit(child));
202	return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev));
203}
204
205static int
206vga_pci_find_extcap(device_t dev, device_t child, int capability,
207    int *capreg)
208{
209
210	return (pci_find_extcap(dev, capability, capreg));
211}
212
213static device_method_t vga_pci_methods[] = {
214	/* Device interface */
215	DEVMETHOD(device_probe,		vga_pci_probe),
216	DEVMETHOD(device_attach,	vga_pci_attach),
217	DEVMETHOD(device_shutdown,	bus_generic_shutdown),
218	DEVMETHOD(device_suspend,	vga_pci_suspend),
219	DEVMETHOD(device_resume,	vga_pci_resume),
220
221	/* Bus interface */
222	DEVMETHOD(bus_read_ivar,	vga_pci_read_ivar),
223	DEVMETHOD(bus_write_ivar,	vga_pci_write_ivar),
224	DEVMETHOD(bus_setup_intr,	bus_generic_setup_intr),
225	DEVMETHOD(bus_teardown_intr,	bus_generic_teardown_intr),
226
227	DEVMETHOD(bus_alloc_resource,	vga_pci_alloc_resource),
228	DEVMETHOD(bus_release_resource,	vga_pci_release_resource),
229	DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
230	DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
231
232	/* PCI interface */
233	DEVMETHOD(pci_read_config,	vga_pci_read_config),
234	DEVMETHOD(pci_write_config,	vga_pci_write_config),
235	DEVMETHOD(pci_enable_busmaster,	vga_pci_enable_busmaster),
236	DEVMETHOD(pci_disable_busmaster, vga_pci_disable_busmaster),
237	DEVMETHOD(pci_enable_io,	vga_pci_enable_io),
238	DEVMETHOD(pci_disable_io,	vga_pci_disable_io),
239	DEVMETHOD(pci_get_powerstate,	vga_pci_get_powerstate),
240	DEVMETHOD(pci_set_powerstate,	vga_pci_set_powerstate),
241	DEVMETHOD(pci_assign_interrupt,	vga_pci_assign_interrupt),
242	DEVMETHOD(pci_find_extcap,	vga_pci_find_extcap),
243
244	{ 0, 0 }
245};
246
247static driver_t vga_pci_driver = {
248	"vgapci",
249	vga_pci_methods,
250	1,
251};
252
253static devclass_t vga_devclass;
254
255DRIVER_MODULE(vgapci, pci, vga_pci_driver, vga_devclass, 0, 0);
256