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iicbus.c (157827) iicbus.c (160372)
1/*-
2 * Copyright (c) 1998, 2001 Nicolas Souchu
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

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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
27#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 1998, 2001 Nicolas Souchu
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

--- 11 unchanged lines hidden (view full) ---

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
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/sys/dev/iicbus/iicbus.c 157827 2006-04-17 22:33:42Z jmg $");
28__FBSDID("$FreeBSD: head/sys/dev/iicbus/iicbus.c 160372 2006-07-14 23:15:06Z imp $");
29
30/*
31 * Autoconfiguration and support routines for the Philips serial I2C bus
32 */
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37#include <sys/module.h>
38#include <sys/bus.h>
39
40
41#include <dev/iicbus/iiconf.h>
42#include <dev/iicbus/iicbus.h>
43
44#include "iicbus_if.h"
45
46#define DEVTOIICBUS(dev) ((struct iicbus_device*)device_get_ivars(dev))
47
29
30/*
31 * Autoconfiguration and support routines for the Philips serial I2C bus
32 */
33
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/kernel.h>
37#include <sys/module.h>
38#include <sys/bus.h>
39
40
41#include <dev/iicbus/iiconf.h>
42#include <dev/iicbus/iicbus.h>
43
44#include "iicbus_if.h"
45
46#define DEVTOIICBUS(dev) ((struct iicbus_device*)device_get_ivars(dev))
47
48static devclass_t iicbus_devclass;
48devclass_t iicbus_devclass;
49
50/* See comments below for why auto-scanning is a bad idea. */
51#define SCAN_IICBUS 0
52
53/*
54 * Device methods
55 */
56static int iicbus_probe(device_t);

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67 /* bus interface */
68 DEVMETHOD(bus_add_child, iicbus_add_child),
69 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
70 DEVMETHOD(bus_print_child, bus_generic_print_child),
71
72 { 0, 0 }
73};
74
49
50/* See comments below for why auto-scanning is a bad idea. */
51#define SCAN_IICBUS 0
52
53/*
54 * Device methods
55 */
56static int iicbus_probe(device_t);

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67 /* bus interface */
68 DEVMETHOD(bus_add_child, iicbus_add_child),
69 DEVMETHOD(bus_driver_added, bus_generic_driver_added),
70 DEVMETHOD(bus_print_child, bus_generic_print_child),
71
72 { 0, 0 }
73};
74
75static driver_t iicbus_driver = {
75driver_t iicbus_driver = {
76 "iicbus",
77 iicbus_methods,
78 sizeof(struct iicbus_softc),
79};
80
81static int
82iicbus_probe(device_t dev)
83{
76 "iicbus",
77 iicbus_methods,
78 sizeof(struct iicbus_softc),
79};
80
81static int
82iicbus_probe(device_t dev)
83{
84 device_set_desc(dev, "Philips I2C bus");
85
84
85 device_set_desc(dev, "Philips I2C bus");
86 return (0);
87}
88
89#if SCAN_IICBUS
90static int
91iic_probe_device(device_t dev, u_char addr)
92{
93 int count;

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134 for (addr = 16; addr < 240; addr++) {
135 if (iic_probe_device(dev, (u_char)addr)) {
136 printf(" <%x>", addr);
137 }
138 }
139 printf("\n");
140#endif
141
86 return (0);
87}
88
89#if SCAN_IICBUS
90static int
91iic_probe_device(device_t dev, u_char addr)
92{
93 int count;

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134 for (addr = 16; addr < 240; addr++) {
135 if (iic_probe_device(dev, (u_char)addr)) {
136 printf(" <%x>", addr);
137 }
138 }
139 printf("\n");
140#endif
141
142 /* attach any known device */
143 device_add_child(dev, "ic", -1);
142 device_add_child(dev, "ic", -1);
144 device_add_child(dev, "iic", -1);
145 device_add_child(dev, "iicsmb", -1);
143 device_add_child(dev, "iicsmb", -1);
146
144#if 0
145 /* attach any known device */
146 device_add_child(dev, "iic", -1);
147#endif
147 bus_generic_attach(dev);
148 bus_generic_attach(dev);
148
149 return (0);
150}
151
152static int
153iicbus_detach(device_t dev)
154{
149 return (0);
150}
151
152static int
153iicbus_detach(device_t dev)
154{
155
155 iicbus_reset(dev, IIC_FASTEST, 0, NULL);
156 iicbus_reset(dev, IIC_FASTEST, 0, NULL);
156
157 bus_generic_detach(dev);
157 bus_generic_detach(dev);
158
159 return (0);
160}
161
162static int
163iicbus_add_child(device_t dev, int order, const char *name, int unit)
164{
158 return (0);
159}
160
161static int
162iicbus_add_child(device_t dev, int order, const char *name, int unit)
163{
165 device_add_child_ordered(dev, order, name, unit);
166
164
165 device_add_child_ordered(dev, order, name, unit);
167 bus_generic_attach(dev);
166 bus_generic_attach(dev);
168
169 return (0);
170}
171
172int
173iicbus_generic_intr(device_t dev, int event, char *buf)
174{
167 return (0);
168}
169
170int
171iicbus_generic_intr(device_t dev, int event, char *buf)
172{
173
175 return (0);
176}
177
178int
179iicbus_null_callback(device_t dev, int index, caddr_t data)
180{
174 return (0);
175}
176
177int
178iicbus_null_callback(device_t dev, int index, caddr_t data)
179{
180
181 return (0);
182}
183
184int
185iicbus_null_repeated_start(device_t dev, u_char addr)
186{
181 return (0);
182}
183
184int
185iicbus_null_repeated_start(device_t dev, u_char addr)
186{
187
187 return (IIC_ENOTSUPP);
188}
189
190DRIVER_MODULE(iicbus, envctrl, iicbus_driver, iicbus_devclass, 0, 0);
191DRIVER_MODULE(iicbus, iicbb, iicbus_driver, iicbus_devclass, 0, 0);
192MODULE_VERSION(iicbus, IICBUS_MODVER);
188 return (IIC_ENOTSUPP);
189}
190
191DRIVER_MODULE(iicbus, envctrl, iicbus_driver, iicbus_devclass, 0, 0);
192DRIVER_MODULE(iicbus, iicbb, iicbus_driver, iicbus_devclass, 0, 0);
193MODULE_VERSION(iicbus, IICBUS_MODVER);