pcii.c revision 166914 
1/*-
2 * Copyright (c) 2005 Poul-Henning Kamp <phk@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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * Driver for GPIB cards based on NEC �PD7210 and compatibles.
27 *
28 * This driver just hooks up to the hardware and leaves all the interesting
29 * stuff to upd7210.c.
30 *
31 * Supported hardware:
32 *    PCIIA compatible cards.
33 *
34 *    Tested and known working:
35 *	"B&C Microsystems PC488A-0"
36 *
37 */
38
39#include <sys/cdefs.h>
40__FBSDID("$FreeBSD: head/sys/dev/ieee488/pcii.c 166914 2007-02-23 19:34:52Z imp $");
41
42#include <sys/param.h>
43#include <sys/systm.h>
44#include <sys/lock.h>
45#include <sys/mutex.h>
46#include <sys/kernel.h>
47#include <sys/module.h>
48#include <sys/bus.h>
49#include <machine/bus.h>
50#include <machine/resource.h>
51#include <sys/rman.h>
52#include <isa/isavar.h>
53
54#define UPD7210_HW_DRIVER
55#include <dev/ieee488/upd7210.h>
56
57struct pcii_softc {
58	int foo;
59	struct resource	*res[3];
60	void *intr_handler;
61	struct upd7210	upd7210;
62};
63
64static devclass_t pcii_devclass;
65
66static int	pcii_probe(device_t dev);
67static int	pcii_attach(device_t dev);
68
69static device_method_t pcii_methods[] = {
70	DEVMETHOD(device_probe,		pcii_probe),
71	DEVMETHOD(device_attach,	pcii_attach),
72	DEVMETHOD(device_suspend,	bus_generic_suspend),
73	DEVMETHOD(device_resume,	bus_generic_resume),
74
75	{ 0, 0 }
76};
77
78static struct resource_spec pcii_res_spec[] = {
79	{ SYS_RES_IRQ,		0, RF_ACTIVE | RF_SHAREABLE},
80	{ SYS_RES_DRQ,		0, RF_ACTIVE | RF_SHAREABLE | RF_OPTIONAL},
81	{ SYS_RES_IOPORT,	0, RF_ACTIVE},
82	{ -1, 0, 0 }
83};
84
85static driver_t pcii_driver = {
86	"pcii",
87	pcii_methods,
88	sizeof(struct pcii_softc),
89};
90
91static int
92pcii_probe(device_t dev)
93{
94	int rid, i, j;
95	u_long start, count;
96	int error = 0;
97	struct pcii_softc *sc;
98
99	device_set_desc(dev, "PCII IEEE-4888 controller");
100	sc = device_get_softc(dev);
101
102	rid = 0;
103	if (bus_get_resource(dev, SYS_RES_IOPORT, rid, &start, &count) != 0)
104		return ENXIO;
105	if ((start & 0x3ff) != 0x2e1)
106		return (ENXIO);
107	count = 1;
108	if (bus_set_resource(dev, SYS_RES_IOPORT, rid, start, count) != 0)
109		return ENXIO;
110	error = bus_alloc_resources(dev, pcii_res_spec, sc->res);
111	if (error)
112		return (error);
113	error = ENXIO;
114	for (i = 0; i < 8; i++) {
115		j = bus_read_1(sc->res[2], i * 0x400);
116		if (j != 0x00 && j != 0xff)
117			error = 0;
118	}
119	if (!error) {
120		bus_write_1(sc->res[2], 3 * 0x400, 0x55);
121		if (bus_read_1(sc->res[2], 3 * 0x400) != 0x55)
122			error = ENXIO;
123	}
124	if (!error) {
125		bus_write_1(sc->res[2], 3 * 0x400, 0xaa);
126		if (bus_read_1(sc->res[2], 3 * 0x400) != 0xaa)
127			error = ENXIO;
128	}
129	bus_release_resources(dev, pcii_res_spec, sc->res);
130	return (error);
131}
132
133static int
134pcii_attach(device_t dev)
135{
136	struct pcii_softc *sc;
137	int		unit;
138	int		rid;
139	int		error = 0;
140
141	unit = device_get_unit(dev);
142	sc = device_get_softc(dev);
143	memset(sc, 0, sizeof *sc);
144
145	device_set_desc(dev, "PCII IEEE-4888 controller");
146
147	error = bus_alloc_resources(dev, pcii_res_spec, sc->res);
148	if (error)
149		return (error);
150
151	error = bus_setup_intr(dev, sc->res[0],
152	    INTR_TYPE_MISC | INTR_MPSAFE, NULL,
153	    upd7210intr, &sc->upd7210, &sc->intr_handler);
154	if (error) {
155		bus_release_resources(dev, pcii_res_spec, sc->res);
156		return (error);
157	}
158
159	for (rid = 0; rid < 8; rid++) {
160		sc->upd7210.reg_res[rid] = sc->res[2];
161		sc->upd7210.reg_offset[rid] = 0x400 * rid;
162	}
163
164	if (sc->res[1] == NULL)
165		sc->upd7210.dmachan = -1;
166	else
167		sc->upd7210.dmachan = rman_get_start(sc->res[1]);
168
169	upd7210attach(&sc->upd7210);
170	return (error);
171}
172
173DRIVER_MODULE(pcii, isa, pcii_driver, pcii_devclass, 0, 0);
174DRIVER_MODULE(pcii, acpi, pcii_driver, pcii_devclass, 0, 0);
175