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>
| 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>
|
32
33/*
34 * Hardware driver for a Philips PCF8584 I2C bus controller sitting
35 * on a generic ISA bus.
36 */
37
38#include <sys/param.h>
39#include <sys/bus.h>
40#include <sys/lock.h>
41#include <sys/kernel.h>
42#include <sys/module.h>
43#include <sys/mutex.h>
44#include <sys/resource.h>
45#include <sys/systm.h>
46
47#include <machine/bus.h>
48#include <machine/resource.h>
49
50#include <sys/rman.h>
51
52#include <isa/isareg.h>
53#include <isa/isavar.h>
54
55#include <dev/iicbus/iiconf.h>
56#include <dev/pcf/pcfvar.h>
57#include "iicbus_if.h"
58
59#define PCF_NAME "pcf"
60
61static void pcf_isa_identify(driver_t *, device_t);
62static int pcf_isa_probe(device_t);
63static int pcf_isa_attach(device_t);
64static int pcf_isa_detach(device_t);
65
66static device_method_t pcf_isa_methods[] = {
67 /* device interface */
68 DEVMETHOD(device_identify, pcf_isa_identify),
69 DEVMETHOD(device_probe, pcf_isa_probe),
70 DEVMETHOD(device_attach, pcf_isa_attach),
71 DEVMETHOD(device_detach, pcf_isa_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
84static devclass_t pcf_isa_devclass;
85
86static driver_t pcf_isa_driver = {
87 PCF_NAME,
88 pcf_isa_methods,
89 sizeof(struct pcf_softc),
90};
91
92static void
93pcf_isa_identify(driver_t *driver, device_t parent)
94{
95 BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, PCF_NAME, 0);
96
97 return;
98}
99
100static int
101pcf_isa_probe(device_t dev)
102{
103 u_long start, count;
104 u_int rid = 0, port, error;
105
106 /* skip PnP probes */
107 if (isa_get_logicalid(dev))
108 return (ENXIO);
109
110 /* The port address must be explicitly specified */
111 bus_get_resource(dev, SYS_RES_IOPORT, rid, &start, &count);
112 if ((error = resource_int_value(PCF_NAME, 0, "port", &port) != 0))
113 return (error);
114
115 /* Probe is only successfull for the specified base io */
116 if (port != (u_int)start)
117 return (ENXIO);
118
119 device_set_desc(dev, "PCF8584 I2C bus controller");
120
121 return (0);
122}
123
124static int
125pcf_isa_attach(device_t dev)
126{
127 struct pcf_softc *sc;
128 int rv = ENXIO;
129
130 sc = DEVTOSOFTC(dev);
131 mtx_init(&sc->pcf_lock, device_get_nameunit(dev), "pcf", MTX_DEF);
132
133 /* IO port is mandatory */
134 sc->res_ioport = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
135 &sc->rid_ioport, RF_ACTIVE);
136 if (sc->res_ioport == 0) {
137 device_printf(dev, "cannot reserve I/O port range\n");
138 goto error;
139 }
140
141 sc->pcf_flags = device_get_flags(dev);
142
143 if (!(sc->pcf_flags & IIC_POLLED)) {
144 sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->rid_irq,
145 RF_ACTIVE);
146 if (sc->res_irq == 0) {
147 device_printf(dev, "can't reserve irq, polled mode.\n");
148 sc->pcf_flags |= IIC_POLLED;
149 }
150 }
151
152 /* reset the chip */
153 pcf_rst_card(dev, IIC_FASTEST, PCF_DEFAULT_ADDR, NULL);
154
155 if (sc->res_irq) {
156 rv = bus_setup_intr(dev, sc->res_irq,
157 INTR_TYPE_NET /* | INTR_ENTROPY */,
158 NULL, pcf_intr, sc, &sc->intr_cookie);
159 if (rv) {
160 device_printf(dev, "could not setup IRQ\n");
161 goto error;
162 }
163 }
164
165 if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL)
166 device_printf(dev, "could not allocate iicbus instance\n");
167
168 /* probe and attach the iicbus */
169 bus_generic_attach(dev);
170
171 return (0);
172
173error:
174 if (sc->res_irq != 0) {
175 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq,
176 sc->res_irq);
177 }
178 if (sc->res_ioport != 0) {
179 bus_release_resource(dev, SYS_RES_IOPORT, sc->rid_ioport,
180 sc->res_ioport);
181 }
182 mtx_destroy(&sc->pcf_lock);
183 return (rv);
184}
185
186static int
187pcf_isa_detach(device_t dev)
188{
189 struct pcf_softc *sc;
190 int rv;
191
192 sc = DEVTOSOFTC(dev);
193
194 if ((rv = bus_generic_detach(dev)) != 0)
195 return (rv);
196
197 if ((rv = device_delete_child(dev, sc->iicbus)) != 0)
198 return (rv);
199
200 if (sc->res_irq != 0) {
201 bus_teardown_intr(dev, sc->res_irq, sc->intr_cookie);
202 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq, sc->res_irq);
203 }
204
205 bus_release_resource(dev, SYS_RES_IOPORT, sc->rid_ioport, sc->res_ioport);
206 mtx_destroy(&sc->pcf_lock);
207
208 return (0);
209}
210
211DRIVER_MODULE(pcf_isa, isa, pcf_isa_driver, pcf_isa_devclass, 0, 0);
| 32
33/*
34 * Hardware driver for a Philips PCF8584 I2C bus controller sitting
35 * on a generic ISA bus.
36 */
37
38#include <sys/param.h>
39#include <sys/bus.h>
40#include <sys/lock.h>
41#include <sys/kernel.h>
42#include <sys/module.h>
43#include <sys/mutex.h>
44#include <sys/resource.h>
45#include <sys/systm.h>
46
47#include <machine/bus.h>
48#include <machine/resource.h>
49
50#include <sys/rman.h>
51
52#include <isa/isareg.h>
53#include <isa/isavar.h>
54
55#include <dev/iicbus/iiconf.h>
56#include <dev/pcf/pcfvar.h>
57#include "iicbus_if.h"
58
59#define PCF_NAME "pcf"
60
61static void pcf_isa_identify(driver_t *, device_t);
62static int pcf_isa_probe(device_t);
63static int pcf_isa_attach(device_t);
64static int pcf_isa_detach(device_t);
65
66static device_method_t pcf_isa_methods[] = {
67 /* device interface */
68 DEVMETHOD(device_identify, pcf_isa_identify),
69 DEVMETHOD(device_probe, pcf_isa_probe),
70 DEVMETHOD(device_attach, pcf_isa_attach),
71 DEVMETHOD(device_detach, pcf_isa_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
84static devclass_t pcf_isa_devclass;
85
86static driver_t pcf_isa_driver = {
87 PCF_NAME,
88 pcf_isa_methods,
89 sizeof(struct pcf_softc),
90};
91
92static void
93pcf_isa_identify(driver_t *driver, device_t parent)
94{
95 BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE, PCF_NAME, 0);
96
97 return;
98}
99
100static int
101pcf_isa_probe(device_t dev)
102{
103 u_long start, count;
104 u_int rid = 0, port, error;
105
106 /* skip PnP probes */
107 if (isa_get_logicalid(dev))
108 return (ENXIO);
109
110 /* The port address must be explicitly specified */
111 bus_get_resource(dev, SYS_RES_IOPORT, rid, &start, &count);
112 if ((error = resource_int_value(PCF_NAME, 0, "port", &port) != 0))
113 return (error);
114
115 /* Probe is only successfull for the specified base io */
116 if (port != (u_int)start)
117 return (ENXIO);
118
119 device_set_desc(dev, "PCF8584 I2C bus controller");
120
121 return (0);
122}
123
124static int
125pcf_isa_attach(device_t dev)
126{
127 struct pcf_softc *sc;
128 int rv = ENXIO;
129
130 sc = DEVTOSOFTC(dev);
131 mtx_init(&sc->pcf_lock, device_get_nameunit(dev), "pcf", MTX_DEF);
132
133 /* IO port is mandatory */
134 sc->res_ioport = bus_alloc_resource_any(dev, SYS_RES_IOPORT,
135 &sc->rid_ioport, RF_ACTIVE);
136 if (sc->res_ioport == 0) {
137 device_printf(dev, "cannot reserve I/O port range\n");
138 goto error;
139 }
140
141 sc->pcf_flags = device_get_flags(dev);
142
143 if (!(sc->pcf_flags & IIC_POLLED)) {
144 sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->rid_irq,
145 RF_ACTIVE);
146 if (sc->res_irq == 0) {
147 device_printf(dev, "can't reserve irq, polled mode.\n");
148 sc->pcf_flags |= IIC_POLLED;
149 }
150 }
151
152 /* reset the chip */
153 pcf_rst_card(dev, IIC_FASTEST, PCF_DEFAULT_ADDR, NULL);
154
155 if (sc->res_irq) {
156 rv = bus_setup_intr(dev, sc->res_irq,
157 INTR_TYPE_NET /* | INTR_ENTROPY */,
158 NULL, pcf_intr, sc, &sc->intr_cookie);
159 if (rv) {
160 device_printf(dev, "could not setup IRQ\n");
161 goto error;
162 }
163 }
164
165 if ((sc->iicbus = device_add_child(dev, "iicbus", -1)) == NULL)
166 device_printf(dev, "could not allocate iicbus instance\n");
167
168 /* probe and attach the iicbus */
169 bus_generic_attach(dev);
170
171 return (0);
172
173error:
174 if (sc->res_irq != 0) {
175 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq,
176 sc->res_irq);
177 }
178 if (sc->res_ioport != 0) {
179 bus_release_resource(dev, SYS_RES_IOPORT, sc->rid_ioport,
180 sc->res_ioport);
181 }
182 mtx_destroy(&sc->pcf_lock);
183 return (rv);
184}
185
186static int
187pcf_isa_detach(device_t dev)
188{
189 struct pcf_softc *sc;
190 int rv;
191
192 sc = DEVTOSOFTC(dev);
193
194 if ((rv = bus_generic_detach(dev)) != 0)
195 return (rv);
196
197 if ((rv = device_delete_child(dev, sc->iicbus)) != 0)
198 return (rv);
199
200 if (sc->res_irq != 0) {
201 bus_teardown_intr(dev, sc->res_irq, sc->intr_cookie);
202 bus_release_resource(dev, SYS_RES_IRQ, sc->rid_irq, sc->res_irq);
203 }
204
205 bus_release_resource(dev, SYS_RES_IOPORT, sc->rid_ioport, sc->res_ioport);
206 mtx_destroy(&sc->pcf_lock);
207
208 return (0);
209}
210
211DRIVER_MODULE(pcf_isa, isa, pcf_isa_driver, pcf_isa_devclass, 0, 0);
|