2 * Copyright (c) 2008 Sam Leffler. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
26 * AR71XX attachment driver for the USB Enhanced Host Controller.
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
34 #include <sys/param.h>
35 #include <sys/systm.h>
38 #include <sys/condvar.h>
39 #include <sys/kernel.h>
40 #include <sys/module.h>
42 #include <machine/bus.h>
44 #include <dev/usb/usb.h>
45 #include <dev/usb/usbdi.h>
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>
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>
57 #include <mips/atheros/ar71xx_bus_space_reversed.h>
59 #define EHCI_HC_DEVSTR "AR71XX Integrated USB 2.0 controller"
61 struct ar71xx_ehci_softc {
62 ehci_softc_t base; /* storage for EHCI code */
65 static device_attach_t ar71xx_ehci_attach;
66 static device_detach_t ar71xx_ehci_detach;
67 static device_shutdown_t ar71xx_ehci_shutdown;
68 static device_suspend_t ar71xx_ehci_suspend;
69 static device_resume_t ar71xx_ehci_resume;
71 bs_r_1_proto(reversed);
72 bs_w_1_proto(reversed);
75 ar71xx_ehci_suspend(device_t self)
77 ehci_softc_t *sc = device_get_softc(self);
80 err = bus_generic_suspend(self);
88 ar71xx_ehci_resume(device_t self)
90 ehci_softc_t *sc = device_get_softc(self);
94 bus_generic_resume(self);
100 ar71xx_ehci_shutdown(device_t self)
102 ehci_softc_t *sc = device_get_softc(self);
105 err = bus_generic_shutdown(self);
114 ar71xx_ehci_probe(device_t self)
117 device_set_desc(self, EHCI_HC_DEVSTR);
119 return (BUS_PROBE_DEFAULT);
123 ar71xx_ehci_attach(device_t self)
125 struct ar71xx_ehci_softc *isc = device_get_softc(self);
126 ehci_softc_t *sc = &isc->base;
130 /* initialise some bus fields */
131 sc->sc_bus.parent = self;
132 sc->sc_bus.devices = sc->sc_devices;
133 sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
135 /* get all DMA memory */
136 if (usb_bus_mem_alloc_all(&sc->sc_bus,
137 USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
141 sc->sc_bus.usbrev = USB_REV_2_0;
143 /* NB: hints fix the memory location and irq */
146 sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
147 if (!sc->sc_io_res) {
148 device_printf(self, "Could not map memory\n");
153 * Craft special resource for bus space ops that handle
154 * byte-alignment of non-word addresses.
156 sc->sc_io_tag = ar71xx_bus_space_reversed;
157 sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
158 sc->sc_io_size = rman_get_size(sc->sc_io_res);
161 sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
163 if (sc->sc_irq_res == NULL) {
164 device_printf(self, "Could not allocate irq\n");
167 sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
168 if (!sc->sc_bus.bdev) {
169 device_printf(self, "Could not add USB device\n");
172 device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
173 device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
175 sprintf(sc->sc_vendor, "Atheros");
178 err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
179 NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
181 device_printf(self, "Could not setup irq, %d\n", err);
182 sc->sc_intr_hdl = NULL;
187 * Arrange to force Host mode, select big-endian byte alignment,
188 * and arrange to not terminate reset operations (the adapter
189 * will ignore it if we do but might as well save a reg write).
190 * Also, the controller has an embedded Transaction Translator
191 * which means port speed must be read from the Port Status
192 * register following a port enable.
194 sc->sc_flags = EHCI_SCFLG_SETMODE;
195 (void) ehci_reset(sc);
199 err = device_probe_and_attach(sc->sc_bus.bdev);
202 device_printf(self, "USB init failed err=%d\n", err);
208 ar71xx_ehci_detach(self);
213 ar71xx_ehci_detach(device_t self)
215 struct ar71xx_ehci_softc *isc = device_get_softc(self);
216 ehci_softc_t *sc = &isc->base;
220 if (sc->sc_bus.bdev) {
221 bdev = sc->sc_bus.bdev;
223 device_delete_child(self, bdev);
225 /* during module unload there are lots of children leftover */
226 device_delete_all_children(self);
229 * disable interrupts that might have been switched on in ehci_init
232 EWRITE4(sc, EHCI_USBINTR, 0);
235 if (sc->sc_irq_res && sc->sc_intr_hdl) {
237 * only call ehci_detach() after ehci_init()
241 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
244 /* XXX or should we panic? */
245 device_printf(self, "Could not tear down irq, %d\n",
247 sc->sc_intr_hdl = NULL;
250 if (sc->sc_irq_res) {
251 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
252 sc->sc_irq_res = NULL;
255 bus_release_resource(self, SYS_RES_MEMORY, 0,
257 sc->sc_io_res = NULL;
259 usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
264 static device_method_t ehci_methods[] = {
265 /* Device interface */
266 DEVMETHOD(device_probe, ar71xx_ehci_probe),
267 DEVMETHOD(device_attach, ar71xx_ehci_attach),
268 DEVMETHOD(device_detach, ar71xx_ehci_detach),
269 DEVMETHOD(device_suspend, ar71xx_ehci_suspend),
270 DEVMETHOD(device_resume, ar71xx_ehci_resume),
271 DEVMETHOD(device_shutdown, ar71xx_ehci_shutdown),
274 DEVMETHOD(bus_print_child, bus_generic_print_child),
279 static driver_t ehci_driver = {
282 sizeof(struct ar71xx_ehci_softc),
285 static devclass_t ehci_devclass;
287 DRIVER_MODULE(ehci, nexus, ehci_driver, ehci_devclass, 0, 0);
288 MODULE_DEPEND(ehci, usb, 1, 1, 1);