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[FreeBSD/FreeBSD.git] / sys / mips / atheros / ar71xx_ohci.c
1 /*-
2  * Copyright (c) 2009, Oleksandr Tymoshenko <gonzo@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 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 <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32 #include <sys/systm.h>
33 #include <sys/bus.h>
34 #include <sys/rman.h>
35 #include <sys/condvar.h>
36 #include <sys/kernel.h>
37 #include <sys/module.h>
38
39 #include <dev/usb/usb.h>
40 #include <dev/usb/usbdi.h>
41
42 #include <dev/usb/usb_core.h>
43 #include <dev/usb/usb_busdma.h>
44 #include <dev/usb/usb_process.h>
45 #include <dev/usb/usb_util.h>
46
47 #include <dev/usb/usb_controller.h>
48 #include <dev/usb/usb_bus.h>
49 #include <dev/usb/controller/ohci.h>
50 #include <dev/usb/controller/ohcireg.h>
51
52 #include <mips/atheros/ar71xxreg.h> /* for stuff in ar71xx_cpudef.h */
53 #include <mips/atheros/ar71xx_cpudef.h>
54
55 static int ar71xx_ohci_attach(device_t dev);
56 static int ar71xx_ohci_detach(device_t dev);
57 static int ar71xx_ohci_probe(device_t dev);
58
59 struct ar71xx_ohci_softc
60 {
61         struct ohci_softc sc_ohci;
62 };
63
64 static int
65 ar71xx_ohci_probe(device_t dev)
66 {
67         device_set_desc(dev, "AR71XX integrated OHCI controller");
68         return (BUS_PROBE_DEFAULT);
69 }
70
71 static void
72 ar71xx_ohci_intr(void *arg)
73 {
74
75         /* XXX TODO: should really see if this was our interrupt.. */
76         ar71xx_device_flush_ddr(AR71XX_CPU_DDR_FLUSH_USB);
77         ohci_interrupt(arg);
78 }
79
80
81 static int
82 ar71xx_ohci_attach(device_t dev)
83 {
84         struct ar71xx_ohci_softc *sc = device_get_softc(dev);
85         int err;
86         int rid;
87
88         /* initialise some bus fields */
89         sc->sc_ohci.sc_bus.parent = dev;
90         sc->sc_ohci.sc_bus.devices = sc->sc_ohci.sc_devices;
91         sc->sc_ohci.sc_bus.devices_max = OHCI_MAX_DEVICES;
92         sc->sc_ohci.sc_bus.dma_bits = 32;
93
94         /* get all DMA memory */
95         if (usb_bus_mem_alloc_all(&sc->sc_ohci.sc_bus,
96             USB_GET_DMA_TAG(dev), &ohci_iterate_hw_softc)) {
97                 return (ENOMEM);
98         }
99
100         sc->sc_ohci.sc_dev = dev;
101
102         rid = 0;
103         sc->sc_ohci.sc_io_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
104             RF_ACTIVE);
105         if (sc->sc_ohci.sc_io_res == NULL) {
106                 err = ENOMEM;
107                 goto error;
108         }
109         sc->sc_ohci.sc_io_tag = rman_get_bustag(sc->sc_ohci.sc_io_res);
110         sc->sc_ohci.sc_io_hdl = rman_get_bushandle(sc->sc_ohci.sc_io_res);
111         sc->sc_ohci.sc_io_size = rman_get_size(sc->sc_ohci.sc_io_res);
112
113         rid = 0;
114         sc->sc_ohci.sc_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
115             RF_ACTIVE);
116         if (sc->sc_ohci.sc_irq_res == NULL) {
117                 err = ENOMEM;
118                 goto error;
119         }
120         sc->sc_ohci.sc_bus.bdev = device_add_child(dev, "usbus", -1);
121         if (sc->sc_ohci.sc_bus.bdev == NULL) {
122                 err = ENOMEM;
123                 goto error;
124         }
125         device_set_ivars(sc->sc_ohci.sc_bus.bdev, &sc->sc_ohci.sc_bus);
126
127         err = bus_setup_intr(dev, sc->sc_ohci.sc_irq_res, 
128             INTR_TYPE_BIO | INTR_MPSAFE, NULL, 
129             ar71xx_ohci_intr, sc, &sc->sc_ohci.sc_intr_hdl);
130         if (err) {
131                 err = ENXIO;
132                 goto error;
133         }
134
135         strlcpy(sc->sc_ohci.sc_vendor, "Atheros", sizeof(sc->sc_ohci.sc_vendor));
136
137         bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl, OHCI_CONTROL, 0);
138
139         err = ohci_init(&sc->sc_ohci);
140         if (!err)
141                 err = device_probe_and_attach(sc->sc_ohci.sc_bus.bdev);
142
143         if (err)
144                 goto error;
145         return (0);
146
147 error:
148         if (err) {
149                 ar71xx_ohci_detach(dev);
150                 return (err);
151         }
152         return (err);
153 }
154
155 static int
156 ar71xx_ohci_detach(device_t dev)
157 {
158         struct ar71xx_ohci_softc *sc = device_get_softc(dev);
159
160         /* during module unload there are lots of children leftover */
161         device_delete_children(dev);
162
163         /*
164          * Put the controller into reset, then disable clocks and do
165          * the MI tear down.  We have to disable the clocks/hardware
166          * after we do the rest of the teardown.  We also disable the
167          * clocks in the opposite order we acquire them, but that
168          * doesn't seem to be absolutely necessary.  We free up the
169          * clocks after we disable them, so the system could, in
170          * theory, reuse them.
171          */
172         bus_space_write_4(sc->sc_ohci.sc_io_tag, sc->sc_ohci.sc_io_hdl,
173             OHCI_CONTROL, 0);
174
175         if (sc->sc_ohci.sc_intr_hdl) {
176                 bus_teardown_intr(dev, sc->sc_ohci.sc_irq_res, sc->sc_ohci.sc_intr_hdl);
177                 sc->sc_ohci.sc_intr_hdl = NULL;
178         }
179
180         if (sc->sc_ohci.sc_irq_res && sc->sc_ohci.sc_intr_hdl) {
181                 /*
182                  * only call ohci_detach() after ohci_init()
183                  */
184                 ohci_detach(&sc->sc_ohci);
185
186                 bus_release_resource(dev, SYS_RES_IRQ, 0, sc->sc_ohci.sc_irq_res);
187                 sc->sc_ohci.sc_irq_res = NULL;
188         }
189         if (sc->sc_ohci.sc_io_res) {
190                 bus_release_resource(dev, SYS_RES_MEMORY, 0, sc->sc_ohci.sc_io_res);
191                 sc->sc_ohci.sc_io_res = NULL;
192                 sc->sc_ohci.sc_io_tag = 0;
193                 sc->sc_ohci.sc_io_hdl = 0;
194         }
195         usb_bus_mem_free_all(&sc->sc_ohci.sc_bus, &ohci_iterate_hw_softc);
196
197         return (0);
198 }
199
200 static device_method_t ohci_methods[] = {
201         /* Device interface */
202         DEVMETHOD(device_probe, ar71xx_ohci_probe),
203         DEVMETHOD(device_attach, ar71xx_ohci_attach),
204         DEVMETHOD(device_detach, ar71xx_ohci_detach),
205         DEVMETHOD(device_suspend, bus_generic_suspend),
206         DEVMETHOD(device_resume, bus_generic_resume),
207         DEVMETHOD(device_shutdown, bus_generic_shutdown),
208
209         DEVMETHOD_END
210 };
211
212 static driver_t ohci_driver = {
213         .name = "ohci",
214         .methods = ohci_methods,
215         .size = sizeof(struct ar71xx_ohci_softc),
216 };
217
218 static devclass_t ohci_devclass;
219
220 DRIVER_MODULE(ohci, apb, ohci_driver, ohci_devclass, 0, 0);