1/*-
2 * Copyright (c) 2009, Nathan Whitehorn <nwhitehorn@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 unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2009, Nathan Whitehorn <nwhitehorn@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 unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
|
28__FBSDID("$FreeBSD: stable/11/sys/dev/iicbus/ofw_iicbus.c 308333 2016-11-05 10:23:02Z mmel $");
| 28__FBSDID("$FreeBSD: stable/11/sys/dev/iicbus/ofw_iicbus.c 331501 2018-03-24 22:39:38Z ian $");
|
29
30#include <sys/param.h>
31#include <sys/bus.h>
32#include <sys/kernel.h>
33#include <sys/libkern.h>
34#include <sys/lock.h>
35#include <sys/module.h>
36#include <sys/mutex.h>
37
38#include <dev/iicbus/iicbus.h>
39#include <dev/iicbus/iiconf.h>
40#include <dev/ofw/ofw_bus.h>
41#include <dev/ofw/ofw_bus_subr.h>
42#include <dev/ofw/openfirm.h>
43
44#include "iicbus_if.h"
45
46/* Methods */
47static device_probe_t ofw_iicbus_probe;
48static device_attach_t ofw_iicbus_attach;
49static device_t ofw_iicbus_add_child(device_t dev, u_int order,
50 const char *name, int unit);
51static const struct ofw_bus_devinfo *ofw_iicbus_get_devinfo(device_t bus,
52 device_t dev);
53
54static device_method_t ofw_iicbus_methods[] = {
55 /* Device interface */
56 DEVMETHOD(device_probe, ofw_iicbus_probe),
57 DEVMETHOD(device_attach, ofw_iicbus_attach),
58
59 /* Bus interface */
60 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
61 DEVMETHOD(bus_add_child, ofw_iicbus_add_child),
62
63 /* ofw_bus interface */
64 DEVMETHOD(ofw_bus_get_devinfo, ofw_iicbus_get_devinfo),
65 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
66 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
67 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
68 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
69 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
70
71 DEVMETHOD_END
72};
73
74struct ofw_iicbus_devinfo {
75 struct iicbus_ivar opd_dinfo; /* Must be the first. */
76 struct ofw_bus_devinfo opd_obdinfo;
77};
78
| 29
30#include <sys/param.h>
31#include <sys/bus.h>
32#include <sys/kernel.h>
33#include <sys/libkern.h>
34#include <sys/lock.h>
35#include <sys/module.h>
36#include <sys/mutex.h>
37
38#include <dev/iicbus/iicbus.h>
39#include <dev/iicbus/iiconf.h>
40#include <dev/ofw/ofw_bus.h>
41#include <dev/ofw/ofw_bus_subr.h>
42#include <dev/ofw/openfirm.h>
43
44#include "iicbus_if.h"
45
46/* Methods */
47static device_probe_t ofw_iicbus_probe;
48static device_attach_t ofw_iicbus_attach;
49static device_t ofw_iicbus_add_child(device_t dev, u_int order,
50 const char *name, int unit);
51static const struct ofw_bus_devinfo *ofw_iicbus_get_devinfo(device_t bus,
52 device_t dev);
53
54static device_method_t ofw_iicbus_methods[] = {
55 /* Device interface */
56 DEVMETHOD(device_probe, ofw_iicbus_probe),
57 DEVMETHOD(device_attach, ofw_iicbus_attach),
58
59 /* Bus interface */
60 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
61 DEVMETHOD(bus_add_child, ofw_iicbus_add_child),
62
63 /* ofw_bus interface */
64 DEVMETHOD(ofw_bus_get_devinfo, ofw_iicbus_get_devinfo),
65 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
66 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
67 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
68 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
69 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
70
71 DEVMETHOD_END
72};
73
74struct ofw_iicbus_devinfo {
75 struct iicbus_ivar opd_dinfo; /* Must be the first. */
76 struct ofw_bus_devinfo opd_obdinfo;
77};
78
|
79devclass_t ofwiicbus_devclass;
| 79devclass_t ofw_iicbus_devclass;
|
80
81DEFINE_CLASS_1(iicbus, ofw_iicbus_driver, ofw_iicbus_methods,
82 sizeof(struct iicbus_softc), iicbus_driver);
| 80
81DEFINE_CLASS_1(iicbus, ofw_iicbus_driver, ofw_iicbus_methods,
82 sizeof(struct iicbus_softc), iicbus_driver);
|
83EARLY_DRIVER_MODULE(ofw_iicbus, iicbb, ofw_iicbus_driver, ofwiicbus_devclass,
| 83EARLY_DRIVER_MODULE(ofw_iicbus, iicbb, ofw_iicbus_driver, ofw_iicbus_devclass,
|
84 0, 0, BUS_PASS_BUS);
| 84 0, 0, BUS_PASS_BUS);
|
85EARLY_DRIVER_MODULE(ofw_iicbus, iichb, ofw_iicbus_driver, ofwiicbus_devclass,
| 85EARLY_DRIVER_MODULE(ofw_iicbus, iichb, ofw_iicbus_driver, ofw_iicbus_devclass,
|
86 0, 0, BUS_PASS_BUS);
| 86 0, 0, BUS_PASS_BUS);
|
| 87EARLY_DRIVER_MODULE(ofw_iicbus, twsi, ofw_iicbus_driver, ofw_iicbus_devclass,
88 0, 0, BUS_PASS_BUS);
|
87MODULE_VERSION(ofw_iicbus, 1);
88MODULE_DEPEND(ofw_iicbus, iicbus, 1, 1, 1);
89
90static int
91ofw_iicbus_probe(device_t dev)
92{
93
94 if (ofw_bus_get_node(dev) == -1)
95 return (ENXIO);
96 device_set_desc(dev, "OFW I2C bus");
97
98 return (0);
99}
100
101static int
102ofw_iicbus_attach(device_t dev)
103{
104 struct iicbus_softc *sc = IICBUS_SOFTC(dev);
105 struct ofw_iicbus_devinfo *dinfo;
106 phandle_t child, node, root;
107 pcell_t freq, paddr;
108 device_t childdev;
109 ssize_t compatlen;
110 char compat[255];
111 char *curstr;
112 u_int iic_addr_8bit = 0;
113
114 sc->dev = dev;
115 mtx_init(&sc->lock, "iicbus", NULL, MTX_DEF);
116
117 /*
118 * If there is a clock-frequency property for the device node, use it as
119 * the starting value for the bus frequency. Then call the common
120 * routine that handles the tunable/sysctl which allows the FDT value to
121 * be overridden by the user.
122 */
123 node = ofw_bus_get_node(dev);
124 freq = 0;
125 OF_getencprop(node, "clock-frequency", &freq, sizeof(freq));
126 iicbus_init_frequency(dev, freq);
127
128 iicbus_reset(dev, IIC_FASTEST, 0, NULL);
129
130 bus_generic_probe(dev);
131 bus_enumerate_hinted_children(dev);
132
133 /*
134 * Check if we're running on a PowerMac, needed for the I2C
135 * address below.
136 */
137 root = OF_peer(0);
138 compatlen = OF_getprop(root, "compatible", compat,
139 sizeof(compat));
140 if (compatlen != -1) {
141 for (curstr = compat; curstr < compat + compatlen;
142 curstr += strlen(curstr) + 1) {
143 if (strncmp(curstr, "MacRISC", 7) == 0)
144 iic_addr_8bit = 1;
145 }
146 }
147
148 /*
149 * Attach those children represented in the device tree.
150 */
151 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
152 /*
153 * Try to get the I2C address first from the i2c-address
154 * property, then try the reg property. It moves around
155 * on different systems.
156 */
157 if (OF_getencprop(child, "i2c-address", &paddr,
158 sizeof(paddr)) == -1)
159 if (OF_getencprop(child, "reg", &paddr,
160 sizeof(paddr)) == -1)
161 continue;
162
163 /*
164 * Now set up the I2C and OFW bus layer devinfo and add it
165 * to the bus.
166 */
167 dinfo = malloc(sizeof(struct ofw_iicbus_devinfo), M_DEVBUF,
168 M_NOWAIT | M_ZERO);
169 if (dinfo == NULL)
170 continue;
171 /*
172 * FreeBSD drivers expect I2C addresses to be expressed as
173 * 8-bit values. Apple OFW data contains 8-bit values, but
174 * Linux FDT data contains 7-bit values, so shift them up to
175 * 8-bit format.
176 */
177 if (iic_addr_8bit)
178 dinfo->opd_dinfo.addr = paddr;
179 else
180 dinfo->opd_dinfo.addr = paddr << 1;
181
182 if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) !=
183 0) {
184 free(dinfo, M_DEVBUF);
185 continue;
186 }
187
188 childdev = device_add_child(dev, NULL, -1);
189 resource_list_init(&dinfo->opd_dinfo.rl);
190 ofw_bus_intr_to_rl(childdev, child,
191 &dinfo->opd_dinfo.rl, NULL);
192 device_set_ivars(childdev, dinfo);
193 }
194
195 /* Register bus */
196 OF_device_register_xref(OF_xref_from_node(node), dev);
197 return (bus_generic_attach(dev));
198}
199
200static device_t
201ofw_iicbus_add_child(device_t dev, u_int order, const char *name, int unit)
202{
203 device_t child;
204 struct ofw_iicbus_devinfo *devi;
205
206 child = device_add_child_ordered(dev, order, name, unit);
207 if (child == NULL)
208 return (child);
209 devi = malloc(sizeof(struct ofw_iicbus_devinfo), M_DEVBUF,
210 M_NOWAIT | M_ZERO);
211 if (devi == NULL) {
212 device_delete_child(dev, child);
213 return (0);
214 }
215
216 /*
217 * NULL all the OFW-related parts of the ivars for non-OFW
218 * children.
219 */
220 devi->opd_obdinfo.obd_node = -1;
221 devi->opd_obdinfo.obd_name = NULL;
222 devi->opd_obdinfo.obd_compat = NULL;
223 devi->opd_obdinfo.obd_type = NULL;
224 devi->opd_obdinfo.obd_model = NULL;
225
226 device_set_ivars(child, devi);
227
228 return (child);
229}
230
231static const struct ofw_bus_devinfo *
232ofw_iicbus_get_devinfo(device_t bus, device_t dev)
233{
234 struct ofw_iicbus_devinfo *dinfo;
235
236 dinfo = device_get_ivars(dev);
237 return (&dinfo->opd_obdinfo);
238}
| 89MODULE_VERSION(ofw_iicbus, 1);
90MODULE_DEPEND(ofw_iicbus, iicbus, 1, 1, 1);
91
92static int
93ofw_iicbus_probe(device_t dev)
94{
95
96 if (ofw_bus_get_node(dev) == -1)
97 return (ENXIO);
98 device_set_desc(dev, "OFW I2C bus");
99
100 return (0);
101}
102
103static int
104ofw_iicbus_attach(device_t dev)
105{
106 struct iicbus_softc *sc = IICBUS_SOFTC(dev);
107 struct ofw_iicbus_devinfo *dinfo;
108 phandle_t child, node, root;
109 pcell_t freq, paddr;
110 device_t childdev;
111 ssize_t compatlen;
112 char compat[255];
113 char *curstr;
114 u_int iic_addr_8bit = 0;
115
116 sc->dev = dev;
117 mtx_init(&sc->lock, "iicbus", NULL, MTX_DEF);
118
119 /*
120 * If there is a clock-frequency property for the device node, use it as
121 * the starting value for the bus frequency. Then call the common
122 * routine that handles the tunable/sysctl which allows the FDT value to
123 * be overridden by the user.
124 */
125 node = ofw_bus_get_node(dev);
126 freq = 0;
127 OF_getencprop(node, "clock-frequency", &freq, sizeof(freq));
128 iicbus_init_frequency(dev, freq);
129
130 iicbus_reset(dev, IIC_FASTEST, 0, NULL);
131
132 bus_generic_probe(dev);
133 bus_enumerate_hinted_children(dev);
134
135 /*
136 * Check if we're running on a PowerMac, needed for the I2C
137 * address below.
138 */
139 root = OF_peer(0);
140 compatlen = OF_getprop(root, "compatible", compat,
141 sizeof(compat));
142 if (compatlen != -1) {
143 for (curstr = compat; curstr < compat + compatlen;
144 curstr += strlen(curstr) + 1) {
145 if (strncmp(curstr, "MacRISC", 7) == 0)
146 iic_addr_8bit = 1;
147 }
148 }
149
150 /*
151 * Attach those children represented in the device tree.
152 */
153 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
154 /*
155 * Try to get the I2C address first from the i2c-address
156 * property, then try the reg property. It moves around
157 * on different systems.
158 */
159 if (OF_getencprop(child, "i2c-address", &paddr,
160 sizeof(paddr)) == -1)
161 if (OF_getencprop(child, "reg", &paddr,
162 sizeof(paddr)) == -1)
163 continue;
164
165 /*
166 * Now set up the I2C and OFW bus layer devinfo and add it
167 * to the bus.
168 */
169 dinfo = malloc(sizeof(struct ofw_iicbus_devinfo), M_DEVBUF,
170 M_NOWAIT | M_ZERO);
171 if (dinfo == NULL)
172 continue;
173 /*
174 * FreeBSD drivers expect I2C addresses to be expressed as
175 * 8-bit values. Apple OFW data contains 8-bit values, but
176 * Linux FDT data contains 7-bit values, so shift them up to
177 * 8-bit format.
178 */
179 if (iic_addr_8bit)
180 dinfo->opd_dinfo.addr = paddr;
181 else
182 dinfo->opd_dinfo.addr = paddr << 1;
183
184 if (ofw_bus_gen_setup_devinfo(&dinfo->opd_obdinfo, child) !=
185 0) {
186 free(dinfo, M_DEVBUF);
187 continue;
188 }
189
190 childdev = device_add_child(dev, NULL, -1);
191 resource_list_init(&dinfo->opd_dinfo.rl);
192 ofw_bus_intr_to_rl(childdev, child,
193 &dinfo->opd_dinfo.rl, NULL);
194 device_set_ivars(childdev, dinfo);
195 }
196
197 /* Register bus */
198 OF_device_register_xref(OF_xref_from_node(node), dev);
199 return (bus_generic_attach(dev));
200}
201
202static device_t
203ofw_iicbus_add_child(device_t dev, u_int order, const char *name, int unit)
204{
205 device_t child;
206 struct ofw_iicbus_devinfo *devi;
207
208 child = device_add_child_ordered(dev, order, name, unit);
209 if (child == NULL)
210 return (child);
211 devi = malloc(sizeof(struct ofw_iicbus_devinfo), M_DEVBUF,
212 M_NOWAIT | M_ZERO);
213 if (devi == NULL) {
214 device_delete_child(dev, child);
215 return (0);
216 }
217
218 /*
219 * NULL all the OFW-related parts of the ivars for non-OFW
220 * children.
221 */
222 devi->opd_obdinfo.obd_node = -1;
223 devi->opd_obdinfo.obd_name = NULL;
224 devi->opd_obdinfo.obd_compat = NULL;
225 devi->opd_obdinfo.obd_type = NULL;
226 devi->opd_obdinfo.obd_model = NULL;
227
228 device_set_ivars(child, devi);
229
230 return (child);
231}
232
233static const struct ofw_bus_devinfo *
234ofw_iicbus_get_devinfo(device_t bus, device_t dev)
235{
236 struct ofw_iicbus_devinfo *dinfo;
237
238 dinfo = device_get_ivars(dev);
239 return (&dinfo->opd_obdinfo);
240}
|