]> CyberLeo.Net >> Repos - FreeBSD/releng/10.0.git/blob - sys/dev/pcf/envctrl.c
- Copy stable/10 (r259064) to releng/10.0 as part of the
[FreeBSD/releng/10.0.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/bus.h>
41 #include <sys/conf.h>
42 #include <sys/kernel.h>
43 #include <sys/lock.h>
44 #include <sys/malloc.h>
45 #include <sys/module.h>
46 #include <sys/mutex.h>
47 #include <sys/resource.h>
48 #include <sys/systm.h>
49 #include <sys/uio.h>
50
51 #include <dev/ofw/ofw_bus.h>
52
53 #include <machine/bus.h>
54 #include <machine/resource.h>
55
56 #include <sys/rman.h>
57
58 #include <dev/iicbus/iicbus.h>
59 #include <dev/iicbus/iiconf.h>
60 #include <dev/pcf/pcfvar.h>
61 #include "iicbus_if.h"
62
63 #undef PCF_DEFAULT_ADDR
64 #define PCF_DEFAULT_ADDR        0x55 /* SUNW,pcf default */
65
66 static int envctrl_probe(device_t);
67 static int envctrl_attach(device_t);
68 static int envctrl_detach(device_t);
69
70 static device_method_t envctrl_methods[] = {
71         /* device interface */
72         DEVMETHOD(device_probe,         envctrl_probe),
73         DEVMETHOD(device_attach,        envctrl_attach),
74         DEVMETHOD(device_detach,        envctrl_detach),
75
76         /* iicbus interface */
77         DEVMETHOD(iicbus_callback,      iicbus_null_callback),
78         DEVMETHOD(iicbus_repeated_start, pcf_repeated_start),
79         DEVMETHOD(iicbus_start,         pcf_start),
80         DEVMETHOD(iicbus_stop,          pcf_stop),
81         DEVMETHOD(iicbus_write,         pcf_write),
82         DEVMETHOD(iicbus_read,          pcf_read),
83         DEVMETHOD(iicbus_reset,         pcf_rst_card),
84         { 0, 0 }
85 };
86
87 static devclass_t envctrl_devclass;
88
89 static driver_t envctrl_driver = {
90         "envctrl",
91         envctrl_methods,
92         sizeof(struct pcf_softc),
93 };
94
95 static int
96 envctrl_probe(device_t dev)
97 {
98
99         if (strcmp("SUNW,envctrl", ofw_bus_get_name(dev)) == 0) {
100                 device_set_desc(dev, "EBus SUNW,envctrl");
101                 return (0);
102         }
103         return (ENXIO);
104 }
105
106 static int
107 envctrl_attach(device_t dev)
108 {
109         struct pcf_softc *sc;
110         int rv = ENXIO;
111
112         sc = DEVTOSOFTC(dev);
113         mtx_init(&sc->pcf_lock, device_get_nameunit(dev), "pcf", MTX_DEF);
114
115         /* IO port is mandatory */
116         sc->res_ioport = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
117                                                 &sc->rid_ioport, RF_ACTIVE);
118         if (sc->res_ioport == 0) {
119                 device_printf(dev, "cannot reserve I/O port range\n");
120                 goto error;
121         }
122
123         sc->pcf_flags = device_get_flags(dev);
124
125         if (!(sc->pcf_flags & IIC_POLLED)) {
126                 sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->rid_irq,
127                                                      RF_ACTIVE);
128                 if (sc->res_irq == 0) {
129                         device_printf(dev, "can't reserve irq, polled mode.\n");
130                         sc->pcf_flags |= IIC_POLLED;
131                 }
132         }
133
134         /* reset the chip */
135         pcf_rst_card(dev, IIC_FASTEST, PCF_DEFAULT_ADDR, NULL);
136
137         rv = bus_setup_intr(dev, sc->res_irq,
138                             INTR_TYPE_NET | INTR_MPSAFE /* | INTR_ENTROPY */,
139                             NULL, pcf_intr, sc, &sc->intr_cookie);
140         if (rv) {
141                 device_printf(dev, "could not setup IRQ\n");
142                 goto error;
143         }
144
145         if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL)
146                 device_printf(dev, "could not allocate iicbus instance\n");
147
148         /* probe and attach the iicbus */
149         bus_generic_attach(dev);
150
151         return (0);
152
153 error:
154         if (sc->res_irq != 0) {
155                 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq,
156                                      sc->res_irq);
157         }
158         if (sc->res_ioport != 0) {
159                 bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ioport,
160                                      sc->res_ioport);
161         }
162         mtx_destroy(&sc->pcf_lock);
163         return (rv);
164 }
165
166 static int
167 envctrl_detach(device_t dev)
168 {
169         struct pcf_softc *sc;
170         int rv;
171
172         sc = DEVTOSOFTC(dev);
173
174         if ((rv = bus_generic_detach(dev)) != 0)
175                 return (rv);
176
177         if ((rv = device_delete_child(dev, sc->iicbus)) != 0)
178                 return (rv);
179
180         if (sc->res_irq != 0) {
181                 bus_teardown_intr(dev, sc->res_irq, sc->intr_cookie);
182                 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq, sc->res_irq);
183         }
184
185         bus_release_resource(dev, SYS_RES_MEMORY, sc->rid_ioport, sc->res_ioport);
186         mtx_destroy(&sc->pcf_lock);
187
188         return (0);
189 }
190
191 DRIVER_MODULE(envctrl, ebus, envctrl_driver, envctrl_devclass, 0, 0);
192 DRIVER_MODULE(iicbus, envctrl, iicbus_driver, iicbus_devclass, 0, 0);