1 /*-
2 * Copyright (c) 2006 M. Warner Losh. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25 #include <sys/cdefs.h>
26 __FBSDID("$FreeBSD: releng/6.2/sys/arm/at91/ohci_atmelarm.c 159907 2006-06-23 23:35:36Z cognet $");
27
28 #include <sys/param.h>
29 #include <sys/systm.h>
30 #include <sys/kernel.h>
31 #include <sys/module.h>
32 #include <sys/bus.h>
33 #include <sys/queue.h>
34 #include <machine/bus.h>
35 #include <sys/rman.h>
36 #include <machine/resource.h>
37
38 #include <dev/usb/usb.h>
39 #include <dev/usb/usbdi.h>
40 #include <dev/usb/usbdivar.h>
41 #include <dev/usb/usb_mem.h>
42
43 #include <dev/usb/ohcireg.h>
44 #include <dev/usb/ohcivar.h>
45
46 #include <arm/at91/at91_pmcvar.h>
47
48 #define MEM_RID 0
49
50 static int ohci_atmelarm_attach(device_t dev);
51 static int ohci_atmelarm_detach(device_t dev);
52
53 struct at91_ohci_softc
54 {
55 struct ohci_softc sc_ohci;
56 struct at91_pmc_clock *iclk;
57 struct at91_pmc_clock *fclk;
58 };
59
60 static int
61 ohci_atmelarm_probe(device_t dev)
62 {
63 device_set_desc(dev, "AT91 integrated ohci controller");
64 return (BUS_PROBE_DEFAULT);
65 }
66
67 static int
68 ohci_atmelarm_attach(device_t dev)
69 {
70 struct at91_ohci_softc *sc = device_get_softc(dev);
71 int err;
72 int rid;
73
74
75 sc->iclk = at91_pmc_clock_ref("ohci_clk");
76 sc->fclk = at91_pmc_clock_ref("uhpck");
77
78 rid = MEM_RID;
79 sc->sc_ohci.io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
80 RF_ACTIVE);
81 if (sc->sc_ohci.io_res == NULL) {
82 err = ENOMEM;
83 goto error;
84 }
85 sc->sc_ohci.iot = rman_get_bustag(sc->sc_ohci.io_res);
86 sc->sc_ohci.ioh = rman_get_bushandle(sc->sc_ohci.io_res);
87
88 rid = 0;
89 sc->sc_ohci.irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
90 RF_ACTIVE);
91 if (sc->sc_ohci.irq_res == NULL) {
92 err = ENOMEM;
93 goto error;
94 }
95 sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usb", -1);
96 if (sc->sc_ohci.sc_bus.bdev == NULL) {
97 err = ENOMEM;
98 goto error;
99 }
100 device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
101
102 err = bus_setup_intr(dev, sc->sc_ohci.irq_res, INTR_TYPE_BIO, ohci_intr, sc,
103 &sc->sc_ohci.ih);
104 if (err) {
105 err = ENXIO;
106 goto error;
107 }
108 strlcpy(sc->sc_ohci.sc_vendor, "Atmel", sizeof(sc->sc_ohci.sc_vendor));
109
110 /*
111 * turn on the clocks from the AT91's point of view. Keep the unit in reset.
112 */
113 // bus_space_write_4(sc->sc_ohci.iot, sc->sc_ohci.ioh, OHCI_CONTROL, 0);
114 at91_pmc_clock_enable(sc->iclk);
115 at91_pmc_clock_enable(sc->fclk);
116 bus_space_write_4(sc->sc_ohci.iot, sc->sc_ohci.ioh, OHCI_CONTROL, 0);
117
118 err = ohci_init(&sc->sc_ohci);
119 if (!err) {
120 sc->sc_ohci.sc_flags |= OHCI_SCFLG_DONEINIT;
121 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
122 }
123
124 error:;
125 if (err) {
126 ohci_atmelarm_detach(dev);
127 return (err);
128 }
129 return (err);
130 }
131
132 static int
133 ohci_atmelarm_detach(device_t dev)
134 {
135 struct at91_ohci_softc *sc = device_get_softc(dev);
136
137 if (sc->sc_ohci.sc_flags & OHCI_SCFLG_DONEINIT) {
138 ohci_detach(&sc->sc_ohci, 0);
139 sc->sc_ohci.sc_flags &= ~OHCI_SCFLG_DONEINIT;
140 }
141
142 /*
143 * Put the controller into reset, then disable clocks and do
144 * the MI tear down. We have to disable the clocks/hardware
145 * after we do the rest of the teardown. We also disable the
146 * clocks in the opposite order we acquire them, but that
147 * doesn't seem to be absolutely necessary. We free up the
148 * clocks after we disable them, so the system could, in
149 * theory, reuse them.
150 */
151 bus_space_write_4(sc->sc_ohci.iot, sc->sc_ohci.ioh, OHCI_CONTROL, 0);
152 at91_pmc_clock_disable(sc->fclk);
153 at91_pmc_clock_disable(sc->iclk);
154 at91_pmc_clock_deref(sc->fclk);
155 at91_pmc_clock_deref(sc->iclk);
156
157 if (sc->sc_ohci.ih) {
158 bus_teardown_intr(dev, sc->sc_ohci.irq_res, sc->sc_ohci.ih);
159 sc->sc_ohci.ih = NULL;
160 }
161 if (sc->sc_ohci.sc_bus.bdev) {
162 device_delete_child(dev, sc->sc_ohci.sc_bus.bdev);
163 sc->sc_ohci.sc_bus.bdev = NULL;
164 }
165 if (sc->sc_ohci.irq_res) {
166 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.irq_res);
167 sc->sc_ohci.irq_res = NULL;
168 }
169 if (sc->sc_ohci.io_res) {
170 bus_release_resource(dev, SYS_RES_MEMORY, MEM_RID, sc->sc_ohci.io_res);
171 sc->sc_ohci.io_res = NULL;
172 sc->sc_ohci.iot = 0;
173 sc->sc_ohci.ioh = 0;
174 }
175 return (0);
176 }
177
178 static device_method_t ohci_methods[] = {
179 /* Device interface */
180 DEVMETHOD(device_probe, ohci_atmelarm_probe),
181 DEVMETHOD(device_attach, ohci_atmelarm_attach),
182 DEVMETHOD(device_detach, ohci_atmelarm_detach),
183 DEVMETHOD(device_shutdown, bus_generic_shutdown),
184
185 /* Bus interface */
186 DEVMETHOD(bus_print_child, bus_generic_print_child),
187
188 {0, 0}
189 };
190
191 static driver_t ohci_driver = {
192 "ohci",
193 ohci_methods,
194 sizeof(struct at91_ohci_softc),
195 };
196
197 static devclass_t ohci_devclass;
198
199 DRIVER_MODULE(ohci, atmelarm, ohci_driver, ohci_devclass, 0, 0);
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