1 /*-
2 * Copyright (c) 2008 Sam Leffler. 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 /*
26 * AR71XX attachment driver for the USB Enhanced Host Controller.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/8.4/sys/mips/atheros/ar71xx_ehci.c 230714 2012-01-29 01:22:48Z marius $");
31
32 #include "opt_bus.h"
33
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/bus.h>
37 #include <sys/rman.h>
38 #include <sys/condvar.h>
39 #include <sys/kernel.h>
40 #include <sys/module.h>
41
42 #include <machine/bus.h>
43
44 #include <dev/usb/usb.h>
45 #include <dev/usb/usbdi.h>
46
47 #include <dev/usb/usb_core.h>
48 #include <dev/usb/usb_busdma.h>
49 #include <dev/usb/usb_process.h>
50 #include <dev/usb/usb_util.h>
51
52 #include <dev/usb/usb_controller.h>
53 #include <dev/usb/usb_bus.h>
54 #include <dev/usb/controller/ehci.h>
55 #include <dev/usb/controller/ehcireg.h>
56
57 #include <mips/atheros/ar71xx_bus_space_reversed.h>
58
59 #define EHCI_HC_DEVSTR "AR71XX Integrated USB 2.0 controller"
60
61 struct ar71xx_ehci_softc {
62 ehci_softc_t base; /* storage for EHCI code */
63 };
64
65 static device_attach_t ar71xx_ehci_attach;
66 static device_detach_t ar71xx_ehci_detach;
67
68 bs_r_1_proto(reversed);
69 bs_w_1_proto(reversed);
70
71 static int
72 ar71xx_ehci_probe(device_t self)
73 {
74
75 device_set_desc(self, EHCI_HC_DEVSTR);
76
77 return (BUS_PROBE_DEFAULT);
78 }
79
80 static int
81 ar71xx_ehci_attach(device_t self)
82 {
83 struct ar71xx_ehci_softc *isc = device_get_softc(self);
84 ehci_softc_t *sc = &isc->base;
85 int err;
86 int rid;
87
88 /* initialise some bus fields */
89 sc->sc_bus.parent = self;
90 sc->sc_bus.devices = sc->sc_devices;
91 sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
92
93 /* get all DMA memory */
94 if (usb_bus_mem_alloc_all(&sc->sc_bus,
95 USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
96 return (ENOMEM);
97 }
98
99 sc->sc_bus.usbrev = USB_REV_2_0;
100
101 /* NB: hints fix the memory location and irq */
102
103 rid = 0;
104 sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
105 if (!sc->sc_io_res) {
106 device_printf(self, "Could not map memory\n");
107 goto error;
108 }
109
110 /*
111 * Craft special resource for bus space ops that handle
112 * byte-alignment of non-word addresses.
113 */
114 sc->sc_io_tag = ar71xx_bus_space_reversed;
115 sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
116 sc->sc_io_size = rman_get_size(sc->sc_io_res);
117
118 rid = 0;
119 sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
120 RF_ACTIVE);
121 if (sc->sc_irq_res == NULL) {
122 device_printf(self, "Could not allocate irq\n");
123 goto error;
124 }
125 sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
126 if (!sc->sc_bus.bdev) {
127 device_printf(self, "Could not add USB device\n");
128 goto error;
129 }
130 device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
131 device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
132
133 sprintf(sc->sc_vendor, "Atheros");
134
135
136 err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
137 NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
138 if (err) {
139 device_printf(self, "Could not setup irq, %d\n", err);
140 sc->sc_intr_hdl = NULL;
141 goto error;
142 }
143
144 /*
145 * Arrange to force Host mode, select big-endian byte alignment,
146 * and arrange to not terminate reset operations (the adapter
147 * will ignore it if we do but might as well save a reg write).
148 * Also, the controller has an embedded Transaction Translator
149 * which means port speed must be read from the Port Status
150 * register following a port enable.
151 */
152 sc->sc_flags = EHCI_SCFLG_SETMODE;
153 (void) ehci_reset(sc);
154
155 err = ehci_init(sc);
156 if (!err) {
157 err = device_probe_and_attach(sc->sc_bus.bdev);
158 }
159 if (err) {
160 device_printf(self, "USB init failed err=%d\n", err);
161 goto error;
162 }
163 return (0);
164
165 error:
166 ar71xx_ehci_detach(self);
167 return (ENXIO);
168 }
169
170 static int
171 ar71xx_ehci_detach(device_t self)
172 {
173 struct ar71xx_ehci_softc *isc = device_get_softc(self);
174 ehci_softc_t *sc = &isc->base;
175 device_t bdev;
176 int err;
177
178 if (sc->sc_bus.bdev) {
179 bdev = sc->sc_bus.bdev;
180 device_detach(bdev);
181 device_delete_child(self, bdev);
182 }
183 /* during module unload there are lots of children leftover */
184 device_delete_all_children(self);
185
186 if (sc->sc_irq_res && sc->sc_intr_hdl) {
187 /*
188 * only call ehci_detach() after ehci_init()
189 */
190 ehci_detach(sc);
191
192 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
193
194 if (err)
195 /* XXX or should we panic? */
196 device_printf(self, "Could not tear down irq, %d\n",
197 err);
198 sc->sc_intr_hdl = NULL;
199 }
200
201 if (sc->sc_irq_res) {
202 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
203 sc->sc_irq_res = NULL;
204 }
205 if (sc->sc_io_res) {
206 bus_release_resource(self, SYS_RES_MEMORY, 0,
207 sc->sc_io_res);
208 sc->sc_io_res = NULL;
209 }
210 usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
211
212 return (0);
213 }
214
215 static device_method_t ehci_methods[] = {
216 /* Device interface */
217 DEVMETHOD(device_probe, ar71xx_ehci_probe),
218 DEVMETHOD(device_attach, ar71xx_ehci_attach),
219 DEVMETHOD(device_detach, ar71xx_ehci_detach),
220 DEVMETHOD(device_suspend, bus_generic_suspend),
221 DEVMETHOD(device_resume, bus_generic_resume),
222 DEVMETHOD(device_shutdown, bus_generic_shutdown),
223
224 DEVMETHOD_END
225 };
226
227 static driver_t ehci_driver = {
228 .name = "ehci",
229 .methods = ehci_methods,
230 .size = sizeof(struct ar71xx_ehci_softc),
231 };
232
233 static devclass_t ehci_devclass;
234
235 DRIVER_MODULE(ehci, nexus, ehci_driver, ehci_devclass, 0, 0);
236 MODULE_DEPEND(ehci, usb, 1, 1, 1);
Cache object: 5e949614651b4b8113039f131eccc17a
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