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_setup.h>
58 #include <mips/atheros/ar71xx_bus_space_reversed.h>
60 #define EHCI_HC_DEVSTR "AR71XX Integrated USB 2.0 controller"
62 struct ar71xx_ehci_softc {
63 ehci_softc_t base; /* storage for EHCI code */
66 static device_attach_t ar71xx_ehci_attach;
67 static device_detach_t ar71xx_ehci_detach;
69 bs_r_1_proto(reversed);
70 bs_w_1_proto(reversed);
73 ar71xx_ehci_probe(device_t self)
76 device_set_desc(self, EHCI_HC_DEVSTR);
78 return (BUS_PROBE_NOWILDCARD);
82 ar71xx_ehci_attach(device_t self)
84 struct ar71xx_ehci_softc *isc = device_get_softc(self);
85 ehci_softc_t *sc = &isc->base;
89 /* initialise some bus fields */
90 sc->sc_bus.parent = self;
91 sc->sc_bus.devices = sc->sc_devices;
92 sc->sc_bus.devices_max = EHCI_MAX_DEVICES;
93 sc->sc_bus.dma_bits = 32;
95 /* get all DMA memory */
96 if (usb_bus_mem_alloc_all(&sc->sc_bus,
97 USB_GET_DMA_TAG(self), &ehci_iterate_hw_softc)) {
101 sc->sc_bus.usbrev = USB_REV_2_0;
103 /* NB: hints fix the memory location and irq */
106 sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
107 if (!sc->sc_io_res) {
108 device_printf(self, "Could not map memory\n");
113 * Craft special resource for bus space ops that handle
114 * byte-alignment of non-word addresses.
116 sc->sc_io_tag = ar71xx_bus_space_reversed;
117 sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
118 sc->sc_io_size = rman_get_size(sc->sc_io_res);
121 sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
123 if (sc->sc_irq_res == NULL) {
124 device_printf(self, "Could not allocate irq\n");
127 sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
128 if (!sc->sc_bus.bdev) {
129 device_printf(self, "Could not add USB device\n");
132 device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
133 device_set_desc(sc->sc_bus.bdev, EHCI_HC_DEVSTR);
135 sprintf(sc->sc_vendor, "Atheros");
138 err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
139 NULL, (driver_intr_t *)ehci_interrupt, sc, &sc->sc_intr_hdl);
141 device_printf(self, "Could not setup irq, %d\n", err);
142 sc->sc_intr_hdl = NULL;
147 * Arrange to force Host mode, select big-endian byte alignment,
148 * and arrange to not terminate reset operations (the adapter
149 * will ignore it if we do but might as well save a reg write).
150 * Also, the controller has an embedded Transaction Translator
151 * which means port speed must be read from the Port Status
152 * register following a port enable.
154 sc->sc_flags = EHCI_SCFLG_SETMODE;
156 switch (ar71xx_soc) {
157 case AR71XX_SOC_AR7241:
158 case AR71XX_SOC_AR7242:
159 case AR71XX_SOC_AR9130:
160 case AR71XX_SOC_AR9132:
161 case AR71XX_SOC_AR9330:
162 case AR71XX_SOC_AR9331:
163 sc->sc_flags |= EHCI_SCFLG_TT | EHCI_SCFLG_NORESTERM;
171 * ehci_reset() needs the correct offset to access the host controller
172 * registers. The AR724x/AR913x offsets aren't 0.
174 sc->sc_offs = EHCI_CAPLENGTH(EREAD4(sc, EHCI_CAPLEN_HCIVERSION));
177 (void) ehci_reset(sc);
181 err = device_probe_and_attach(sc->sc_bus.bdev);
184 device_printf(self, "USB init failed err=%d\n", err);
190 ar71xx_ehci_detach(self);
195 ar71xx_ehci_detach(device_t self)
197 struct ar71xx_ehci_softc *isc = device_get_softc(self);
198 ehci_softc_t *sc = &isc->base;
201 /* during module unload there are lots of children leftover */
202 device_delete_children(self);
204 if (sc->sc_irq_res && sc->sc_intr_hdl) {
206 * only call ehci_detach() after ehci_init()
210 err = bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
213 /* XXX or should we panic? */
214 device_printf(self, "Could not tear down irq, %d\n",
216 sc->sc_intr_hdl = NULL;
219 if (sc->sc_irq_res) {
220 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
221 sc->sc_irq_res = NULL;
224 bus_release_resource(self, SYS_RES_MEMORY, 0,
226 sc->sc_io_res = NULL;
228 usb_bus_mem_free_all(&sc->sc_bus, &ehci_iterate_hw_softc);
233 static device_method_t ehci_methods[] = {
234 /* Device interface */
235 DEVMETHOD(device_probe, ar71xx_ehci_probe),
236 DEVMETHOD(device_attach, ar71xx_ehci_attach),
237 DEVMETHOD(device_detach, ar71xx_ehci_detach),
238 DEVMETHOD(device_suspend, bus_generic_suspend),
239 DEVMETHOD(device_resume, bus_generic_resume),
240 DEVMETHOD(device_shutdown, bus_generic_shutdown),
245 static driver_t ehci_driver = {
247 .methods = ehci_methods,
248 .size = sizeof(struct ar71xx_ehci_softc),
251 static devclass_t ehci_devclass;
253 DRIVER_MODULE(ehci, nexus, ehci_driver, ehci_devclass, 0, 0);
254 MODULE_DEPEND(ehci, usb, 1, 1, 1);