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1 /*-
2  * Copyright (c) 2010 Hans Petter Selasky. 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 AND CONTRIBUTORS ``AS IS'' AND
14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23  * SUCH DAMAGE.
24  */
25
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
28
29 #include <sys/stdint.h>
30 #include <sys/stddef.h>
31 #include <sys/param.h>
32 #include <sys/queue.h>
33 #include <sys/types.h>
34 #include <sys/systm.h>
35 #include <sys/kernel.h>
36 #include <sys/bus.h>
37 #include <sys/module.h>
38 #include <sys/lock.h>
39 #include <sys/mutex.h>
40 #include <sys/condvar.h>
41 #include <sys/sysctl.h>
42 #include <sys/sx.h>
43 #include <sys/unistd.h>
44 #include <sys/callout.h>
45 #include <sys/malloc.h>
46 #include <sys/priv.h>
47
48 #include <dev/usb/usb.h>
49 #include <dev/usb/usbdi.h>
50
51 #include <dev/usb/usb_core.h>
52 #include <dev/usb/usb_busdma.h>
53 #include <dev/usb/usb_process.h>
54 #include <dev/usb/usb_util.h>
55
56 #include <dev/usb/usb_controller.h>
57 #include <dev/usb/usb_bus.h>
58 #include <dev/usb/usb_pci.h>
59 #include <dev/usb/controller/xhci.h>
60 #include <dev/usb/controller/xhcireg.h>
61
62 static device_probe_t xhci_pci_probe;
63 static device_attach_t xhci_pci_attach;
64 static device_detach_t xhci_pci_detach;
65 static device_suspend_t xhci_pci_suspend;
66 static device_resume_t xhci_pci_resume;
67 static device_shutdown_t xhci_pci_shutdown;
68 static void xhci_pci_takecontroller(device_t);
69
70 static device_method_t xhci_device_methods[] = {
71         /* device interface */
72         DEVMETHOD(device_probe, xhci_pci_probe),
73         DEVMETHOD(device_attach, xhci_pci_attach),
74         DEVMETHOD(device_detach, xhci_pci_detach),
75         DEVMETHOD(device_suspend, xhci_pci_suspend),
76         DEVMETHOD(device_resume, xhci_pci_resume),
77         DEVMETHOD(device_shutdown, xhci_pci_shutdown),
78         /* bus interface */
79         DEVMETHOD(bus_print_child, bus_generic_print_child),
80
81         {0, 0}
82 };
83
84 static driver_t xhci_driver = {
85         .name = "xhci",
86         .methods = xhci_device_methods,
87         .size = sizeof(struct xhci_softc),
88 };
89
90 static devclass_t xhci_devclass;
91
92 DRIVER_MODULE(xhci, pci, xhci_driver, xhci_devclass, 0, 0);
93 MODULE_DEPEND(xhci, usb, 1, 1, 1);
94
95 static int
96 xhci_pci_suspend(device_t self)
97 {
98         struct xhci_softc *sc = device_get_softc(self);
99         int err;
100
101         err = bus_generic_suspend(self);
102         if (err)
103                 return (err);
104         xhci_suspend(sc);
105         return (0);
106 }
107
108 static int
109 xhci_pci_resume(device_t self)
110 {
111         struct xhci_softc *sc = device_get_softc(self);
112
113         xhci_pci_takecontroller(self);
114         xhci_resume(sc);
115
116         bus_generic_resume(self);
117
118         return (0);
119 }
120
121 static int
122 xhci_pci_shutdown(device_t self)
123 {
124         struct xhci_softc *sc = device_get_softc(self);
125         int err;
126
127         err = bus_generic_shutdown(self);
128         if (err)
129                 return (err);
130         xhci_shutdown(sc);
131
132         return (0);
133 }
134
135 static const char *
136 xhci_pci_match(device_t self)
137 {
138         if ((pci_get_class(self) == PCIC_SERIALBUS)
139             && (pci_get_subclass(self) == PCIS_SERIALBUS_USB)
140             && (pci_get_progif(self) == PCIP_SERIALBUS_USB_XHCI)) {
141                 return ("XHCI (generic) USB 3.0 controller");
142         }
143         return (NULL);                  /* dunno */
144 }
145
146 static int
147 xhci_pci_probe(device_t self)
148 {
149         const char *desc = xhci_pci_match(self);
150
151         if (desc) {
152                 device_set_desc(self, desc);
153                 return (0);
154         } else {
155                 return (ENXIO);
156         }
157 }
158
159 static int
160 xhci_pci_attach(device_t self)
161 {
162         struct xhci_softc *sc = device_get_softc(self);
163         int err;
164         int rid;
165
166         /* XXX check for 64-bit capability */
167
168         if (xhci_init(sc, self)) {
169                 device_printf(self, "Could not initialize softc\n");
170                 goto error;
171         }
172
173         pci_enable_busmaster(self);
174
175         rid = PCI_XHCI_CBMEM;
176         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
177             RF_ACTIVE);
178         if (!sc->sc_io_res) {
179                 device_printf(self, "Could not map memory\n");
180                 goto error;
181         }
182         sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
183         sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
184         sc->sc_io_size = rman_get_size(sc->sc_io_res);
185
186         rid = 0;
187         sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
188             RF_SHAREABLE | RF_ACTIVE);
189         if (sc->sc_irq_res == NULL) {
190                 device_printf(self, "Could not allocate IRQ\n");
191                 goto error;
192         }
193         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
194         if (sc->sc_bus.bdev == NULL) {
195                 device_printf(self, "Could not add USB device\n");
196                 goto error;
197         }
198         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
199
200         sprintf(sc->sc_vendor, "0x%04x", pci_get_vendor(self));
201
202 #if (__FreeBSD_version >= 700031)
203         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
204             NULL, (driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl);
205 #else
206         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
207             (driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl);
208 #endif
209         if (err) {
210                 device_printf(self, "Could not setup IRQ, err=%d\n", err);
211                 sc->sc_intr_hdl = NULL;
212                 goto error;
213         }
214         xhci_pci_takecontroller(self);
215
216         err = xhci_halt_controller(sc);
217
218         if (err == 0)
219                 err = xhci_start_controller(sc);
220
221         if (err == 0)
222                 err = device_probe_and_attach(sc->sc_bus.bdev);
223
224         if (err) {
225                 device_printf(self, "XHCI halt/start/probe failed err=%d\n", err);
226                 goto error;
227         }
228         return (0);
229
230 error:
231         xhci_pci_detach(self);
232         return (ENXIO);
233 }
234
235 static int
236 xhci_pci_detach(device_t self)
237 {
238         struct xhci_softc *sc = device_get_softc(self);
239         device_t bdev;
240
241         if (sc->sc_bus.bdev != NULL) {
242                 bdev = sc->sc_bus.bdev;
243                 device_detach(bdev);
244                 device_delete_child(self, bdev);
245         }
246         /* during module unload there are lots of children leftover */
247         device_delete_all_children(self);
248
249         pci_disable_busmaster(self);
250
251         if (sc->sc_irq_res && sc->sc_intr_hdl) {
252
253                 xhci_halt_controller(sc);
254
255                 bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
256                 sc->sc_intr_hdl = NULL;
257         }
258         if (sc->sc_irq_res) {
259                 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
260                 sc->sc_irq_res = NULL;
261         }
262         if (sc->sc_io_res) {
263                 bus_release_resource(self, SYS_RES_MEMORY, PCI_XHCI_CBMEM,
264                     sc->sc_io_res);
265                 sc->sc_io_res = NULL;
266         }
267
268         xhci_uninit(sc);
269
270         return (0);
271 }
272
273 static void
274 xhci_pci_takecontroller(device_t self)
275 {
276         struct xhci_softc *sc = device_get_softc(self);
277         uint32_t cparams;
278         uint32_t eecp;
279         uint32_t eec;
280         uint16_t to;
281         uint8_t bios_sem;
282
283         cparams = XREAD4(sc, capa, XHCI_HCSPARAMS0);
284
285         eec = -1;
286
287         /* Synchronise with the BIOS if it owns the controller. */
288         for (eecp = XHCI_HCS0_XECP(cparams) << 2; eecp != 0 && XHCI_XECP_NEXT(eec);
289             eecp += XHCI_XECP_NEXT(eec) << 2) {
290                 eec = XREAD4(sc, capa, eecp);
291
292                 if (XHCI_XECP_ID(eec) != XHCI_ID_USB_LEGACY)
293                         continue;
294                 bios_sem = XREAD1(sc, capa, eecp +
295                     XHCI_XECP_BIOS_SEM);
296                 if (bios_sem == 0)
297                         continue;
298                 device_printf(sc->sc_bus.bdev, "waiting for BIOS "
299                     "to give up control\n");
300                 XWRITE1(sc, capa, eecp +
301                     XHCI_XECP_OS_SEM, 1);
302                 to = 500;
303                 while (1) {
304                         bios_sem = XREAD1(sc, capa, eecp +
305                             XHCI_XECP_BIOS_SEM);
306                         if (bios_sem == 0)
307                                 break;
308
309                         if (--to == 0) {
310                                 device_printf(sc->sc_bus.bdev,
311                                     "timed out waiting for BIOS\n");
312                                 break;
313                         }
314                         usb_pause_mtx(NULL, hz / 100);  /* wait 10ms */
315                 }
316         }
317 }