1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2012 Hans Petter Selasky.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following 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 AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include "opt_acpi.h"
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/condvar.h>
34 #include <sys/kernel.h>
35 #include <sys/lock.h>
36 #include <sys/malloc.h>
37 #include <sys/module.h>
38 #include <sys/mutex.h>
39 #include <sys/rman.h>
40
41 #include <contrib/dev/acpica/include/acpi.h>
42 #include <contrib/dev/acpica/include/accommon.h>
43
44 #include <dev/acpica/acpivar.h>
45
46 #include <dev/usb/usb.h>
47 #include <dev/usb/usbdi.h>
48
49 #include <dev/usb/usb_core.h>
50 #include <dev/usb/usb_busdma.h>
51 #include <dev/usb/usb_process.h>
52 #include <dev/usb/usb_util.h>
53
54 #include <dev/usb/usb_controller.h>
55 #include <dev/usb/usb_bus.h>
56
57 #include <dev/usb/controller/dwc_otg.h>
58
59 static device_probe_t dwc_otg_probe;
60 static device_attach_t dwc_otg_attach;
61 static device_attach_t dwc_otg_detach;
62
63 static char *dwc_otg_ids[] = {
64 "BCM2848",
65 NULL
66 };
67
68 static int
dwc_otg_probe(device_t dev)69 dwc_otg_probe(device_t dev)
70 {
71 int rv;
72
73 if (acpi_disabled("dwc_otg"))
74 return (ENXIO);
75
76 rv = ACPI_ID_PROBE(device_get_parent(dev), dev, dwc_otg_ids, NULL);
77 if (rv > 0)
78 return (rv);
79
80 device_set_desc(dev, "DWC OTG 2.0 integrated USB controller");
81
82 return (BUS_PROBE_DEFAULT);
83 }
84
85 static int
dwc_otg_attach(device_t dev)86 dwc_otg_attach(device_t dev)
87 {
88 struct dwc_otg_softc *sc = device_get_softc(dev);
89 int err;
90 int rid;
91
92 sc->sc_bus.parent = dev;
93
94 /* assume device mode (this is only used for the Raspberry Pi 4's
95 * USB-C port, which only works in device mode) */
96 sc->sc_mode = DWC_MODE_DEVICE;
97
98 rid = 0;
99 sc->sc_io_res =
100 bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
101
102 if (sc->sc_io_res == NULL)
103 goto error;
104
105 rid = 0;
106 sc->sc_irq_res =
107 bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
108 if (sc->sc_irq_res == NULL)
109 goto error;
110
111 err = dwc_otg_init(sc);
112 if (err == 0) {
113 err = device_probe_and_attach(sc->sc_bus.bdev);
114 }
115 if (err)
116 goto error;
117
118 return (0);
119
120 error:
121 dwc_otg_detach(dev);
122 return (ENXIO);
123 }
124
125 static int
dwc_otg_detach(device_t dev)126 dwc_otg_detach(device_t dev)
127 {
128 struct dwc_otg_softc *sc = device_get_softc(dev);
129 int error;
130
131 /* during module unload there are lots of children leftover */
132 error = bus_generic_detach(dev);
133 if (error != 0)
134 return (error);
135
136 if (sc->sc_irq_res && sc->sc_intr_hdl) {
137 /*
138 * only call dwc_otg_uninit() after dwc_otg_init()
139 */
140 dwc_otg_uninit(sc);
141
142 bus_teardown_intr(dev, sc->sc_irq_res,
143 sc->sc_intr_hdl);
144 sc->sc_intr_hdl = NULL;
145 }
146 /* free IRQ channel, if any */
147 if (sc->sc_irq_res) {
148 bus_release_resource(dev, SYS_RES_IRQ, 0,
149 sc->sc_irq_res);
150 sc->sc_irq_res = NULL;
151 }
152 /* free memory resource, if any */
153 if (sc->sc_io_res) {
154 bus_release_resource(dev, SYS_RES_MEMORY, 0,
155 sc->sc_io_res);
156 sc->sc_io_res = NULL;
157 }
158 usb_bus_mem_free_all(&sc->sc_bus, NULL);
159
160 return (0);
161 }
162
163 static device_method_t dwc_otg_methods[] = {
164 /* Device interface */
165 DEVMETHOD(device_probe, dwc_otg_probe),
166 DEVMETHOD(device_attach, dwc_otg_attach),
167 DEVMETHOD(device_detach, dwc_otg_detach),
168 DEVMETHOD(device_suspend, bus_generic_suspend),
169 DEVMETHOD(device_resume, bus_generic_resume),
170 DEVMETHOD(device_shutdown, bus_generic_shutdown),
171
172 DEVMETHOD_END
173 };
174
175 static driver_t dwc_otg_driver = {
176 .name = "dwcotg",
177 .methods = dwc_otg_methods,
178 .size = sizeof(struct dwc_otg_softc),
179 };
180
181 DRIVER_MODULE(dwcotg, acpi, dwc_otg_driver, 0, 0);
182 MODULE_DEPEND(dwcotg, usb, 1, 1, 1);
183