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[FreeBSD/releng/8.2.git] / sys / dev / usb / controller / xhci_pci.c
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/linker_set.h>
38 #include <sys/module.h>
39 #include <sys/lock.h>
40 #include <sys/mutex.h>
41 #include <sys/condvar.h>
42 #include <sys/sysctl.h>
43 #include <sys/sx.h>
44 #include <sys/unistd.h>
45 #include <sys/callout.h>
46 #include <sys/malloc.h>
47 #include <sys/priv.h>
48
49 #include <dev/usb/usb.h>
50 #include <dev/usb/usbdi.h>
51
52 #include <dev/usb/usb_core.h>
53 #include <dev/usb/usb_busdma.h>
54 #include <dev/usb/usb_process.h>
55 #include <dev/usb/usb_util.h>
56
57 #include <dev/usb/usb_controller.h>
58 #include <dev/usb/usb_bus.h>
59 #include <dev/usb/usb_pci.h>
60 #include <dev/usb/controller/xhci.h>
61 #include <dev/usb/controller/xhcireg.h>
62
63 static device_probe_t xhci_pci_probe;
64 static device_attach_t xhci_pci_attach;
65 static device_detach_t xhci_pci_detach;
66 static device_suspend_t xhci_pci_suspend;
67 static device_resume_t xhci_pci_resume;
68 static device_shutdown_t xhci_pci_shutdown;
69 static void xhci_pci_takecontroller(device_t);
70
71 static device_method_t xhci_device_methods[] = {
72         /* device interface */
73         DEVMETHOD(device_probe, xhci_pci_probe),
74         DEVMETHOD(device_attach, xhci_pci_attach),
75         DEVMETHOD(device_detach, xhci_pci_detach),
76         DEVMETHOD(device_suspend, xhci_pci_suspend),
77         DEVMETHOD(device_resume, xhci_pci_resume),
78         DEVMETHOD(device_shutdown, xhci_pci_shutdown),
79         /* bus interface */
80         DEVMETHOD(bus_print_child, bus_generic_print_child),
81
82         {0, 0}
83 };
84
85 static driver_t xhci_driver = {
86         .name = "xhci",
87         .methods = xhci_device_methods,
88         .size = sizeof(struct xhci_softc),
89 };
90
91 static devclass_t xhci_devclass;
92
93 DRIVER_MODULE(xhci, pci, xhci_driver, xhci_devclass, 0, 0);
94 MODULE_DEPEND(xhci, usb, 1, 1, 1);
95
96 static int
97 xhci_pci_suspend(device_t self)
98 {
99         struct xhci_softc *sc = device_get_softc(self);
100         int err;
101
102         err = bus_generic_suspend(self);
103         if (err)
104                 return (err);
105         xhci_suspend(sc);
106         return (0);
107 }
108
109 static int
110 xhci_pci_resume(device_t self)
111 {
112         struct xhci_softc *sc = device_get_softc(self);
113
114         xhci_pci_takecontroller(self);
115         xhci_resume(sc);
116
117         bus_generic_resume(self);
118
119         return (0);
120 }
121
122 static int
123 xhci_pci_shutdown(device_t self)
124 {
125         struct xhci_softc *sc = device_get_softc(self);
126         int err;
127
128         err = bus_generic_shutdown(self);
129         if (err)
130                 return (err);
131         xhci_shutdown(sc);
132
133         return (0);
134 }
135
136 static const char *
137 xhci_pci_match(device_t self)
138 {
139         if ((pci_get_class(self) == PCIC_SERIALBUS)
140             && (pci_get_subclass(self) == PCIS_SERIALBUS_USB)
141             && (pci_get_progif(self) == PCI_INTERFACE_XHCI)) {
142                 return ("XHCI (generic) USB 3.0 controller");
143         }
144         return (NULL);                  /* dunno */
145 }
146
147 static int
148 xhci_pci_probe(device_t self)
149 {
150         const char *desc = xhci_pci_match(self);
151
152         if (desc) {
153                 device_set_desc(self, desc);
154                 return (0);
155         } else {
156                 return (ENXIO);
157         }
158 }
159
160 static int
161 xhci_pci_attach(device_t self)
162 {
163         struct xhci_softc *sc = device_get_softc(self);
164         int err;
165         int rid;
166
167         /* XXX check for 64-bit capability */
168
169         if (xhci_init(sc, self)) {
170                 device_printf(self, "Could not initialize softc\n");
171                 goto error;
172         }
173
174         pci_enable_busmaster(self);
175
176         rid = PCI_XHCI_CBMEM;
177         sc->sc_io_res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid,
178             RF_ACTIVE);
179         if (!sc->sc_io_res) {
180                 device_printf(self, "Could not map memory\n");
181                 goto error;
182         }
183         sc->sc_io_tag = rman_get_bustag(sc->sc_io_res);
184         sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
185         sc->sc_io_size = rman_get_size(sc->sc_io_res);
186
187         rid = 0;
188         sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
189             RF_SHAREABLE | RF_ACTIVE);
190         if (sc->sc_irq_res == NULL) {
191                 device_printf(self, "Could not allocate IRQ\n");
192                 goto error;
193         }
194         sc->sc_bus.bdev = device_add_child(self, "usbus", -1);
195         if (sc->sc_bus.bdev == NULL) {
196                 device_printf(self, "Could not add USB device\n");
197                 goto error;
198         }
199         device_set_ivars(sc->sc_bus.bdev, &sc->sc_bus);
200
201         sprintf(sc->sc_vendor, "0x%04x", pci_get_vendor(self));
202
203 #if (__FreeBSD_version >= 700031)
204         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
205             NULL, (driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl);
206 #else
207         err = bus_setup_intr(self, sc->sc_irq_res, INTR_TYPE_BIO | INTR_MPSAFE,
208             (driver_intr_t *)xhci_interrupt, sc, &sc->sc_intr_hdl);
209 #endif
210         if (err) {
211                 device_printf(self, "Could not setup IRQ, err=%d\n", err);
212                 sc->sc_intr_hdl = NULL;
213                 goto error;
214         }
215         xhci_pci_takecontroller(self);
216
217         err = xhci_halt_controller(sc);
218
219         if (err == 0)
220                 err = xhci_start_controller(sc);
221
222         if (err == 0)
223                 err = device_probe_and_attach(sc->sc_bus.bdev);
224
225         if (err) {
226                 device_printf(self, "XHCI halt/start/probe failed err=%d\n", err);
227                 goto error;
228         }
229         return (0);
230
231 error:
232         xhci_pci_detach(self);
233         return (ENXIO);
234 }
235
236 static int
237 xhci_pci_detach(device_t self)
238 {
239         struct xhci_softc *sc = device_get_softc(self);
240         device_t bdev;
241
242         if (sc->sc_bus.bdev != NULL) {
243                 bdev = sc->sc_bus.bdev;
244                 device_detach(bdev);
245                 device_delete_child(self, bdev);
246         }
247         /* during module unload there are lots of children leftover */
248         device_delete_all_children(self);
249
250         pci_disable_busmaster(self);
251
252         if (sc->sc_irq_res && sc->sc_intr_hdl) {
253
254                 xhci_halt_controller(sc);
255
256                 bus_teardown_intr(self, sc->sc_irq_res, sc->sc_intr_hdl);
257                 sc->sc_intr_hdl = NULL;
258         }
259         if (sc->sc_irq_res) {
260                 bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
261                 sc->sc_irq_res = NULL;
262         }
263         if (sc->sc_io_res) {
264                 bus_release_resource(self, SYS_RES_MEMORY, PCI_XHCI_CBMEM,
265                     sc->sc_io_res);
266                 sc->sc_io_res = NULL;
267         }
268
269         xhci_uninit(sc);
270
271         return (0);
272 }
273
274 static void
275 xhci_pci_takecontroller(device_t self)
276 {
277         struct xhci_softc *sc = device_get_softc(self);
278         uint32_t cparams;
279         uint32_t eecp;
280         uint32_t eec;
281         uint16_t to;
282         uint8_t bios_sem;
283
284         cparams = XREAD4(sc, capa, XHCI_HCSPARAMS0);
285
286         eec = -1;
287
288         /* Synchronise with the BIOS if it owns the controller. */
289         for (eecp = XHCI_HCS0_XECP(cparams) << 2; eecp != 0 && XHCI_XECP_NEXT(eec);
290             eecp += XHCI_XECP_NEXT(eec) << 2) {
291                 eec = XREAD4(sc, capa, eecp);
292
293                 if (XHCI_XECP_ID(eec) != XHCI_ID_USB_LEGACY)
294                         continue;
295                 bios_sem = XREAD1(sc, capa, eecp +
296                     XHCI_XECP_BIOS_SEM);
297                 if (bios_sem == 0)
298                         continue;
299                 device_printf(sc->sc_bus.bdev, "waiting for BIOS "
300                     "to give up control\n");
301                 XWRITE1(sc, capa, eecp +
302                     XHCI_XECP_OS_SEM, 1);
303                 to = 500;
304                 while (1) {
305                         bios_sem = XREAD1(sc, capa, eecp +
306                             XHCI_XECP_BIOS_SEM);
307                         if (bios_sem == 0)
308                                 break;
309
310                         if (--to == 0) {
311                                 device_printf(sc->sc_bus.bdev,
312                                     "timed out waiting for BIOS\n");
313                                 break;
314                         }
315                         usb_pause_mtx(NULL, hz / 100);  /* wait 10ms */
316                 }
317         }
318 }