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Create releng/7.2 from stable/7 in preparation for 7.2-RELEASE.
[FreeBSD/releng/7.2.git] / sys / dev / pcf / envctrl.c
1 /*-
2  * Copyright (c) 2004 Joerg Wunsch
3  *
4  * derived from sys/i386/isa/pcf.c which is:
5  *
6  * Copyright (c) 1998 Nicolas Souchu, Marc Bouget
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  */
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 /*
34  * Device specific driver for the SUNW,envctrl device found on some
35  * UltraSPARC Sun systems.  This device is a Philips PCF8584 sitting
36  * on the Ebus2.
37  */
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/bus.h>
42 #include <sys/conf.h>
43 #include <sys/kernel.h>
44 #include <sys/malloc.h>
45 #include <sys/module.h>
46 #include <sys/resource.h>
47 #include <sys/uio.h>
48
49 #include <dev/ofw/ofw_bus.h>
50
51 #include <machine/bus.h>
52 #include <machine/resource.h>
53
54 #include <sys/rman.h>
55
56 #include <dev/iicbus/iiconf.h>
57 #include <dev/pcf/pcfvar.h>
58 #include "iicbus_if.h"
59
60 #undef PCF_DEFAULT_ADDR
61 #define PCF_DEFAULT_ADDR        0x55 /* SUNW,pcf default */
62
63 static int envctrl_probe(device_t);
64 static int envctrl_attach(device_t);
65 static int envctrl_detach(device_t);
66
67 static device_method_t envctrl_methods[] = {
68         /* device interface */
69         DEVMETHOD(device_probe,         envctrl_probe),
70         DEVMETHOD(device_attach,        envctrl_attach),
71         DEVMETHOD(device_detach,        envctrl_detach),
72
73         /* iicbus interface */
74         DEVMETHOD(iicbus_callback,      iicbus_null_callback),
75         DEVMETHOD(iicbus_repeated_start, pcf_repeated_start),
76         DEVMETHOD(iicbus_start,         pcf_start),
77         DEVMETHOD(iicbus_stop,          pcf_stop),
78         DEVMETHOD(iicbus_write,         pcf_write),
79         DEVMETHOD(iicbus_read,          pcf_read),
80         DEVMETHOD(iicbus_reset,         pcf_rst_card),
81         { 0, 0 }
82 };
83
84 static devclass_t envctrl_devclass;
85
86 static driver_t envctrl_driver = {
87         "envctrl",
88         envctrl_methods,
89         sizeof(struct pcf_softc),
90 };
91
92 static int
93 envctrl_probe(device_t dev)
94 {
95
96         if (strcmp("SUNW,envctrl", ofw_bus_get_name(dev)) == 0) {
97                 device_set_desc(dev, "EBus SUNW,envctrl");
98                 return (0);
99         }
100         return (ENXIO);
101 }
102
103 static int
104 envctrl_attach(device_t dev)
105 {
106         struct pcf_softc *sc;
107         int rv = ENXIO;
108
109         sc = DEVTOSOFTC(dev);
110         bzero(sc, sizeof(struct pcf_softc));
111
112         /* IO port is mandatory */
113         sc->res_ioport = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
114                                                 &sc->rid_ioport, RF_ACTIVE);
115         if (sc->res_ioport == 0) {
116                 device_printf(dev, "cannot reserve I/O port range\n");
117                 goto error;
118         }
119         sc->bt_ioport = rman_get_bustag(sc->res_ioport);
120         sc->bh_ioport = rman_get_bushandle(sc->res_ioport);
121
122         sc->pcf_flags = device_get_flags(dev);
123
124         if (!(sc->pcf_flags & IIC_POLLED)) {
125                 sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->rid_irq,
126                                                      RF_ACTIVE);
127                 if (sc->res_irq == 0) {
128                         device_printf(dev, "can't reserve irq, polled mode.\n");
129                         sc->pcf_flags |= IIC_POLLED;
130                 }
131         }
132
133         /* reset the chip */
134         pcf_rst_card(dev, IIC_FASTEST, PCF_DEFAULT_ADDR, NULL);
135
136         rv = bus_setup_intr(dev, sc->res_irq,
137                             INTR_TYPE_NET /* | INTR_ENTROPY */,
138                             NULL, pcf_intr, sc, &sc->intr_cookie);
139         if (rv) {
140                 device_printf(dev, "could not setup IRQ\n");
141                 goto error;
142         }
143
144         if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL)
145                 device_printf(dev, "could not allocate iicbus instance\n");
146
147         /* probe and attach the iicbus */
148         bus_generic_attach(dev);
149
150         return (0);
151
152 error:
153         if (sc->res_irq != 0) {
154                 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq,
155                                      sc->res_irq);
156         }
157         if (sc->res_ioport != 0) {
158                 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ioport,
159                                      sc->res_ioport);
160         }
161         return (rv);
162 }
163
164 static int
165 envctrl_detach(device_t dev)
166 {
167         struct pcf_softc *sc;
168         int rv;
169
170         sc = DEVTOSOFTC(dev);
171
172         if ((rv = bus_generic_detach(dev)) != 0)
173                 return (rv);
174
175         if ((rv = device_delete_child(dev, sc->iicbus)) != 0)
176                 return (rv);
177
178         if (sc->res_irq != 0) {
179                 bus_teardown_intr(dev, sc->res_irq, sc->intr_cookie);
180                 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq, sc->res_irq);
181         }
182
183         bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ioport, sc->res_ioport);
184
185         return (0);
186 }
187
188 DRIVER_MODULE(envctrl, ebus, envctrl_driver, envctrl_devclass, 0, 0);
189 MODULE_DEPEND(envctrl, iicbus, PCF_MINVER, PCF_PREFVER, PCF_MAXVER);
190 MODULE_VERSION(envctrl, PCF_MODVER);