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kernel - AHCI - enable AHCI device initiated power management
[dragonfly.git] / sys / dev / usbmisc / ums / ums.c
blob01bd6f4be87235ac2dd9fc6c82965c5da08fa2ed
1 /*
2 * $FreeBSD: src/sys/dev/usb/ums.c,v 1.64 2003/11/09 09:17:22 tanimura Exp $
3 * $DragonFly: src/sys/dev/usbmisc/ums/ums.c,v 1.31 2008/08/14 20:55:54 hasso Exp $
4 */
5
6 /*
7 * Copyright (c) 1998 The NetBSD Foundation, Inc.
8 * All rights reserved.
9 *
10 * This code is derived from software contributed to The NetBSD Foundation
11 * by Lennart Augustsson (lennart@augustsson.net) at
12 * Carlstedt Research & Technology.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. All advertising materials mentioning features or use of this software
23 * must display the following acknowledgement:
24 * This product includes software developed by the NetBSD
25 * Foundation, Inc. and its contributors.
26 * 4. Neither the name of The NetBSD Foundation nor the names of its
27 * contributors may be used to endorse or promote products derived
28 * from this software without specific prior written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
32 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
33 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
34 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
43 /*
44 * HID spec: http://www.usb.org/developers/data/devclass/hid1_1.pdf
45 */
46
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/kernel.h>
50 #include <sys/malloc.h>
51 #include <sys/module.h>
52 #include <sys/bus.h>
53 #include <sys/conf.h>
54 #include <sys/tty.h>
55 #include <sys/file.h>
56 #include <sys/select.h>
57 #include <sys/vnode.h>
58 #include <sys/poll.h>
59 #include <sys/sysctl.h>
60 #include <sys/thread2.h>
61
62 #include <bus/usb/usb.h>
63 #include <bus/usb/usbhid.h>
64
65 #include <bus/usb/usbdi.h>
66 #include <bus/usb/usbdi_util.h>
67 #include <bus/usb/usb_quirks.h>
68 #include <bus/usb/hid.h>
69
70 #include <machine/mouse.h>
71
72 #ifdef USB_DEBUG
73 #define DPRINTF(x) if (umsdebug) kprintf x
74 #define DPRINTFN(n,x) if (umsdebug>(n)) kprintf x
75 int umsdebug = 0;
76 SYSCTL_NODE(_hw_usb, OID_AUTO, ums, CTLFLAG_RW, 0, "USB ums");
77 SYSCTL_INT(_hw_usb_ums, OID_AUTO, debug, CTLFLAG_RW,
78 &umsdebug, 0, "ums debug level");
79 #else
80 #define DPRINTF(x)
81 #define DPRINTFN(n,x)
82 #endif
83
84 #define UMSUNIT(s) (minor(s)&0x1f)
85
86 #define MS_TO_TICKS(ms) ((ms) * hz / 1000)
87
88 #define QUEUE_BUFSIZE 400 /* MUST be divisible by 5 _and_ 8 */
89
90 struct ums_softc {
91 device_t sc_dev; /* base device */
92 usbd_interface_handle sc_iface; /* interface */
93 usbd_pipe_handle sc_intrpipe; /* interrupt pipe */
94 int sc_ep_addr;
95
96 u_char *sc_ibuf;
97 u_int8_t sc_iid;
98 int sc_isize;
99 struct hid_location sc_loc_x, sc_loc_y, sc_loc_z;
100 struct hid_location *sc_loc_btn;
101
102 struct callout sc_timeout; /* for spurious button ups */
103
104 int sc_enabled;
105 int sc_disconnected; /* device is gone */
106
107 int flags; /* device configuration */
108 #define UMS_Z 0x01 /* z direction available */
109 #define UMS_SPUR_BUT_UP 0x02 /* spurious button up events */
110 int nbuttons;
111 #define MAX_BUTTONS 31 /* must not exceed size of sc_buttons */
112
113 u_char qbuf[QUEUE_BUFSIZE]; /* must be divisable by 3&4 */
114 u_char dummy[100]; /* XXX just for safety and for now */
115 int qcount, qhead, qtail;
116 mousehw_t hw;
117 mousemode_t mode;
118 mousestatus_t status;
119
120 int state;
121 # define UMS_ASLEEP 0x01 /* readFromDevice is waiting */
122 # define UMS_SELECT 0x02 /* select is waiting */
123 struct selinfo rsel; /* process waiting in select */
124 };
125
126 #define MOUSE_FLAGS_MASK (HIO_CONST|HIO_RELATIVE)
127 #define MOUSE_FLAGS (HIO_RELATIVE)
128
129 static void ums_intr(usbd_xfer_handle xfer,
130 usbd_private_handle priv, usbd_status status);
131
132 static void ums_add_to_queue(struct ums_softc *sc,
133 int dx, int dy, int dz, int buttons);
134 static void ums_add_to_queue_timeout(void *priv);
135
136 static int ums_enable(void *);
137 static void ums_disable(void *);
138
139 static d_open_t ums_open;
140 static d_close_t ums_close;
141 static d_read_t ums_read;
142 static d_ioctl_t ums_ioctl;
143 static d_poll_t ums_poll;
144
145 #define UMS_CDEV_MAJOR 111
146
147 static struct dev_ops ums_ops = {
148 { "ums", UMS_CDEV_MAJOR, 0 },
149 .d_open = ums_open,
150 .d_close = ums_close,
151 .d_read = ums_read,
152 .d_ioctl = ums_ioctl,
153 .d_poll = ums_poll,
154 };
155
156 static device_probe_t ums_match;
157 static device_attach_t ums_attach;
158 static device_detach_t ums_detach;
159
160 static devclass_t ums_devclass;
161
162 static kobj_method_t ums_methods[] = {
163 DEVMETHOD(device_probe, ums_match),
164 DEVMETHOD(device_attach, ums_attach),
165 DEVMETHOD(device_detach, ums_detach),
166 {0,0}
167 };
168
169 static driver_t ums_driver = {
170 "ums",
171 ums_methods,
172 sizeof(struct ums_softc)
173 };
174
175 MODULE_DEPEND(ums, usb, 1, 1, 1);
176
177 static int
178 ums_match(device_t self)
179 {
180 struct usb_attach_arg *uaa = device_get_ivars(self);
181 usb_interface_descriptor_t *id;
182 int size, ret;
183 void *desc;
184 usbd_status err;
185
186 if (!uaa->iface)
187 return (UMATCH_NONE);
188 id = usbd_get_interface_descriptor(uaa->iface);
189 if (!id || id->bInterfaceClass != UICLASS_HID)
190 return (UMATCH_NONE);
191
192 err = usbd_read_report_desc(uaa->iface, &desc, &size, M_TEMP);
193 if (err)
194 return (UMATCH_NONE);
195
196 if (hid_is_collection(desc, size,
197 HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_MOUSE)))
198 ret = UMATCH_IFACECLASS;
199 else
200 ret = UMATCH_NONE;
201
202 kfree(desc, M_TEMP);
203 return (ret);
204 }
205
206 static int
207 ums_attach(device_t self)
208 {
209 struct ums_softc *sc = device_get_softc(self);
210 struct usb_attach_arg *uaa = device_get_ivars(self);
211 usbd_interface_handle iface = uaa->iface;
212 usb_endpoint_descriptor_t *ed;
213 int size;
214 void *desc;
215 usbd_status err;
216 u_int32_t flags;
217 int i;
218 struct hid_location loc_btn;
219
220 sc->sc_disconnected = 1;
221 sc->sc_iface = iface;
222 sc->sc_dev = self;
223 ed = usbd_interface2endpoint_descriptor(iface, 0);
224 if (!ed) {
225 kprintf("%s: could not read endpoint descriptor\n",
226 device_get_nameunit(sc->sc_dev));
227 return ENXIO;
228 }
229
230 DPRINTFN(10,("ums_attach: bLength=%d bDescriptorType=%d "
231 "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d"
232 " bInterval=%d\n",
233 ed->bLength, ed->bDescriptorType,
234 UE_GET_ADDR(ed->bEndpointAddress),
235 UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN ? "in":"out",
236 UE_GET_XFERTYPE(ed->bmAttributes),
237 UGETW(ed->wMaxPacketSize), ed->bInterval));
238
239 if (UE_GET_DIR(ed->bEndpointAddress) != UE_DIR_IN ||
240 UE_GET_XFERTYPE(ed->bmAttributes) != UE_INTERRUPT) {
241 kprintf("%s: unexpected endpoint\n",
242 device_get_nameunit(sc->sc_dev));
243 return ENXIO;
244 }
245
246 err = usbd_read_report_desc(uaa->iface, &desc, &size, M_TEMP);
247 if (err)
248 return ENXIO;
249
250 if (!hid_locate(desc, size, HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_X),
251 hid_input, &sc->sc_loc_x, &flags)) {
252 kprintf("%s: mouse has no X report\n", device_get_nameunit(sc->sc_dev));
253 return ENXIO;
254 }
255 if ((flags & MOUSE_FLAGS_MASK) != MOUSE_FLAGS) {
256 kprintf("%s: X report 0x%04x not supported\n",
257 device_get_nameunit(sc->sc_dev), flags);
258 return ENXIO;
259 }
260
261 if (!hid_locate(desc, size, HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_Y),
262 hid_input, &sc->sc_loc_y, &flags)) {
263 kprintf("%s: mouse has no Y report\n", device_get_nameunit(sc->sc_dev));
264 return ENXIO;
265 }
266 if ((flags & MOUSE_FLAGS_MASK) != MOUSE_FLAGS) {
267 kprintf("%s: Y report 0x%04x not supported\n",
268 device_get_nameunit(sc->sc_dev), flags);
269 return ENXIO;
270 }
271
272 /* try to guess the Z activator: first check Z, then WHEEL */
273 if (hid_locate(desc, size, HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_Z),
274 hid_input, &sc->sc_loc_z, &flags) ||
275 hid_locate(desc, size, HID_USAGE2(HUP_GENERIC_DESKTOP, HUG_WHEEL),
276 hid_input, &sc->sc_loc_z, &flags)) {
277 if ((flags & MOUSE_FLAGS_MASK) != MOUSE_FLAGS) {
278 sc->sc_loc_z.size = 0; /* Bad Z coord, ignore it */
279 } else {
280 sc->flags |= UMS_Z;
281 }
282 }
283
284 /* figure out the number of buttons */
285 for (i = 1; i <= MAX_BUTTONS; i++)
286 if (!hid_locate(desc, size, HID_USAGE2(HUP_BUTTON, i),
287 hid_input, &loc_btn, 0))
288 break;
289 sc->nbuttons = i - 1;
290 sc->sc_loc_btn = kmalloc(sizeof(struct hid_location)*sc->nbuttons,
291 M_USBDEV, M_INTWAIT);
292
293 kprintf("%s: %d buttons%s\n", device_get_nameunit(sc->sc_dev),
294 sc->nbuttons, sc->flags & UMS_Z? " and Z dir." : "");
295
296 for (i = 1; i <= sc->nbuttons; i++)
297 hid_locate(desc, size, HID_USAGE2(HUP_BUTTON, i),
298 hid_input, &sc->sc_loc_btn[i-1], 0);
299
300 sc->sc_isize = hid_report_size(desc, size, hid_input, &sc->sc_iid);
301 sc->sc_ibuf = kmalloc(sc->sc_isize, M_USB, M_INTWAIT);
302 sc->sc_ep_addr = ed->bEndpointAddress;
303 sc->sc_disconnected = 0;
304 kfree(desc, M_TEMP);
305
306 #ifdef USB_DEBUG
307 DPRINTF(("ums_attach: sc=%p\n", sc));
308 DPRINTF(("ums_attach: X\t%d/%d\n",
309 sc->sc_loc_x.pos, sc->sc_loc_x.size));
310 DPRINTF(("ums_attach: Y\t%d/%d\n",
311 sc->sc_loc_y.pos, sc->sc_loc_y.size));
312 if (sc->flags & UMS_Z)
313 DPRINTF(("ums_attach: Z\t%d/%d\n",
314 sc->sc_loc_z.pos, sc->sc_loc_z.size));
315 for (i = 1; i <= sc->nbuttons; i++) {
316 DPRINTF(("ums_attach: B%d\t%d/%d\n",
317 i, sc->sc_loc_btn[i-1].pos,sc->sc_loc_btn[i-1].size));
318 }
319 DPRINTF(("ums_attach: size=%d, id=%d\n", sc->sc_isize, sc->sc_iid));
320 #endif
321
322 if (sc->nbuttons > MOUSE_MSC_MAXBUTTON)
323 sc->hw.buttons = MOUSE_MSC_MAXBUTTON;
324 else
325 sc->hw.buttons = sc->nbuttons;
326 sc->hw.iftype = MOUSE_IF_USB;
327 sc->hw.type = MOUSE_MOUSE;
328 sc->hw.model = MOUSE_MODEL_GENERIC;
329 sc->hw.hwid = 0;
330 sc->mode.protocol = MOUSE_PROTO_MSC;
331 sc->mode.rate = -1;
332 sc->mode.resolution = MOUSE_RES_UNKNOWN;
333 sc->mode.accelfactor = 0;
334 sc->mode.level = 0;
335 sc->mode.packetsize = MOUSE_MSC_PACKETSIZE;
336 sc->mode.syncmask[0] = MOUSE_MSC_SYNCMASK;
337 sc->mode.syncmask[1] = MOUSE_MSC_SYNC;
338
339 sc->status.flags = 0;
340 sc->status.button = sc->status.obutton = 0;
341 sc->status.dx = sc->status.dy = sc->status.dz = 0;
342
343 make_dev(&ums_ops, device_get_unit(self),
344 UID_ROOT, GID_OPERATOR,
345 0644, "ums%d", device_get_unit(self));
346
347 if (usbd_get_quirks(uaa->device)->uq_flags & UQ_SPUR_BUT_UP) {
348 DPRINTF(("%s: Spurious button up events\n",
349 device_get_nameunit(sc->sc_dev)));
350 sc->flags |= UMS_SPUR_BUT_UP;
351 }
352
353 return 0;
354 }
355
356
357 static int
358 ums_detach(device_t self)
359 {
360 struct ums_softc *sc = device_get_softc(self);
361
362 if (sc->sc_enabled)
363 ums_disable(sc);
364
365 DPRINTF(("%s: disconnected\n", device_get_nameunit(self)));
366
367 kfree(sc->sc_loc_btn, M_USB);
368 kfree(sc->sc_ibuf, M_USB);
369
370 /* someone waiting for data */
371 /*
372 * XXX If we wakeup the process here, the device will be gone by
373 * the time the process gets a chance to notice. *_close and friends
374 * should be fixed to handle this case.
375 * Or we should do a delayed detach for this.
376 * Does this delay now force tsleep to exit with an error?
377 */
378 if (sc->state & UMS_ASLEEP) {
379 sc->state &= ~UMS_ASLEEP;
380 wakeup(sc);
381 }
382 if (sc->state & UMS_SELECT) {
383 sc->state &= ~UMS_SELECT;
384 selwakeup(&sc->rsel);
385 }
386 dev_ops_remove_minor(&ums_ops, /*-1, */device_get_unit(self));
387
388 return 0;
389 }
390
391 void
392 ums_intr(usbd_xfer_handle xfer, usbd_private_handle addr,
393 usbd_status status)
394 {
395 struct ums_softc *sc = addr;
396 u_char *ibuf;
397 int dx, dy, dz;
398 u_char buttons = 0;
399 int i;
400
401 #define UMS_BUT(i) ((i) < 3 ? (((i) + 2) % 3) : (i))
402
403 DPRINTFN(5, ("ums_intr: sc=%p status=%d\n", sc, status));
404 DPRINTFN(5, ("ums_intr: data = %02x %02x %02x\n",
405 sc->sc_ibuf[0], sc->sc_ibuf[1], sc->sc_ibuf[2]));
406
407 if (status == USBD_CANCELLED)
408 return;
409
410 if (status != USBD_NORMAL_COMPLETION) {
411 DPRINTF(("ums_intr: status=%d\n", status));
412 if (status == USBD_STALLED)
413 usbd_clear_endpoint_stall_async(sc->sc_intrpipe);
414 return;
415 }
416
417 ibuf = sc->sc_ibuf;
418 if (sc->sc_iid) {
419 if (*ibuf++ != sc->sc_iid)
420 return;
421 }
422
423 dx = hid_get_data(ibuf, &sc->sc_loc_x);
424 dy = -hid_get_data(ibuf, &sc->sc_loc_y);
425 dz = -hid_get_data(ibuf, &sc->sc_loc_z);
426 for (i = 0; i < sc->nbuttons; i++)
427 if (hid_get_data(ibuf, &sc->sc_loc_btn[i]))
428 buttons |= (1 << UMS_BUT(i));
429
430 if (dx || dy || dz || (sc->flags & UMS_Z)
431 || buttons != sc->status.button) {
432 DPRINTFN(5, ("ums_intr: x:%d y:%d z:%d buttons:0x%x\n",
433 dx, dy, dz, buttons));
434
435 sc->status.button = buttons;
436 sc->status.dx += dx;
437 sc->status.dy += dy;
438 sc->status.dz += dz;
439
440 /* Discard data in case of full buffer */
441 if (sc->qcount == sizeof(sc->qbuf)) {
442 DPRINTF(("Buffer full, discarded packet"));
443 return;
444 }
445
446 /*
447 * The Qtronix keyboard has a built in PS/2 port for a mouse.
448 * The firmware once in a while posts a spurious button up
449 * event. This event we ignore by doing a timeout for 50 msecs.
450 * If we receive dx=dy=dz=buttons=0 before we add the event to
451 * the queue.
452 * In any other case we delete the timeout event.
453 */
454 if (sc->flags & UMS_SPUR_BUT_UP &&
455 dx == 0 && dy == 0 && dz == 0 && buttons == 0) {
456 callout_reset(&sc->sc_timeout, MS_TO_TICKS(50),
457 ums_add_to_queue_timeout, (void *) sc);
458 } else {
459 callout_stop(&sc->sc_timeout);
460 ums_add_to_queue(sc, dx, dy, dz, buttons);
461 }
462 }
463 }
464
465 static void
466 ums_add_to_queue_timeout(void *priv)
467 {
468 struct ums_softc *sc = priv;
469
470 crit_enter();
471 ums_add_to_queue(sc, 0, 0, 0, 0);
472 crit_exit();
473 }
474
475 static void
476 ums_add_to_queue(struct ums_softc *sc, int dx, int dy, int dz, int buttons)
477 {
478 /* Discard data in case of full buffer */
479 if (sc->qhead+sc->mode.packetsize > sizeof(sc->qbuf)) {
480 DPRINTF(("Buffer full, discarded packet"));
481 return;
482 }
483
484 if (dx > 254) dx = 254;
485 if (dx < -256) dx = -256;
486 if (dy > 254) dy = 254;
487 if (dy < -256) dy = -256;
488 if (dz > 126) dz = 126;
489 if (dz < -128) dz = -128;
490
491 sc->qbuf[sc->qhead] = sc->mode.syncmask[1];
492 sc->qbuf[sc->qhead] |= ~buttons & MOUSE_MSC_BUTTONS;
493 sc->qbuf[sc->qhead+1] = dx >> 1;
494 sc->qbuf[sc->qhead+2] = dy >> 1;
495 sc->qbuf[sc->qhead+3] = dx - (dx >> 1);
496 sc->qbuf[sc->qhead+4] = dy - (dy >> 1);
497
498 if (sc->mode.level == 1) {
499 sc->qbuf[sc->qhead+5] = dz >> 1;
500 sc->qbuf[sc->qhead+6] = dz - (dz >> 1);
501 sc->qbuf[sc->qhead+7] = ((~buttons >> 3)
502 & MOUSE_SYS_EXTBUTTONS);
503 }
504
505 sc->qhead += sc->mode.packetsize;
506 sc->qcount += sc->mode.packetsize;
507 /* wrap round at end of buffer */
508 if (sc->qhead >= sizeof(sc->qbuf))
509 sc->qhead = 0;
510
511 /* someone waiting for data */
512 if (sc->state & UMS_ASLEEP) {
513 sc->state &= ~UMS_ASLEEP;
514 wakeup(sc);
515 }
516 if (sc->state & UMS_SELECT) {
517 sc->state &= ~UMS_SELECT;
518 selwakeup(&sc->rsel);
519 }
520 }
521
522 static int
523 ums_enable(void *v)
524 {
525 struct ums_softc *sc = v;
526
527 usbd_status err;
528
529 if (sc->sc_enabled)
530 return EBUSY;
531
532 sc->sc_enabled = 1;
533 sc->qcount = 0;
534 sc->qhead = sc->qtail = 0;
535 sc->status.flags = 0;
536 sc->status.button = sc->status.obutton = 0;
537 sc->status.dx = sc->status.dy = sc->status.dz = 0;
538
539 callout_init(&sc->sc_timeout);
540
541 /* Set up interrupt pipe. */
542 err = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr,
543 USBD_SHORT_XFER_OK, &sc->sc_intrpipe, sc,
544 sc->sc_ibuf, sc->sc_isize, ums_intr,
545 USBD_DEFAULT_INTERVAL);
546 if (err) {
547 DPRINTF(("ums_enable: usbd_open_pipe_intr failed, error=%d\n",
548 err));
549 sc->sc_enabled = 0;
550 return (EIO);
551 }
552 return (0);
553 }
554
555 static void
556 ums_disable(void *priv)
557 {
558 struct ums_softc *sc = priv;
559
560 callout_stop(&sc->sc_timeout);
561
562 /* Disable interrupts. */
563 usbd_abort_pipe(sc->sc_intrpipe);
564 usbd_close_pipe(sc->sc_intrpipe);
565
566 sc->sc_enabled = 0;
567
568 if (sc->qcount != 0)
569 DPRINTF(("Discarded %d bytes in queue\n", sc->qcount));
570 }
571
572 static int
573 ums_open(struct dev_open_args *ap)
574 {
575 cdev_t dev = ap->a_head.a_dev;
576 struct ums_softc *sc;
577
578 sc = devclass_get_softc(ums_devclass, UMSUNIT(dev));
579 if (sc == NULL)
580 return (ENXIO);
581
582 return ums_enable(sc);
583 }
584
585 static int
586 ums_close(struct dev_close_args *ap)
587 {
588 cdev_t dev = ap->a_head.a_dev;
589 struct ums_softc *sc;
590
591 sc = devclass_get_softc(ums_devclass, UMSUNIT(dev));
592
593 if (!sc)
594 return 0;
595
596 if (sc->sc_enabled)
597 ums_disable(sc);
598
599 return 0;
600 }
601
602 static int
603 ums_read(struct dev_read_args *ap)
604 {
605 cdev_t dev = ap->a_head.a_dev;
606 struct uio *uio = ap->a_uio;
607 struct ums_softc *sc;
608 char buf[sizeof(sc->qbuf)];
609 int l = 0;
610 int error;
611
612 sc = devclass_get_softc(ums_devclass, UMSUNIT(dev));
613
614 crit_enter();
615 if (!sc) {
616 crit_exit();
617 return EIO;
618 }
619
620 while (sc->qcount == 0 ) {
621 if (ap->a_ioflag & IO_NDELAY) { /* non-blocking I/O */
622 crit_exit();
623 return EWOULDBLOCK;
624 }
625
626 sc->state |= UMS_ASLEEP; /* blocking I/O */
627 error = tsleep(sc, PCATCH, "umsrea", 0);
628 if (error) {
629 crit_exit();
630 return error;
631 } else if (!sc->sc_enabled) {
632 crit_exit();
633 return EINTR;
634 }
635 /* check whether the device is still there */
636
637 sc = devclass_get_softc(ums_devclass, UMSUNIT(dev));
638 if (!sc) {
639 crit_exit();
640 return EIO;
641 }
642 }
643
644 /*
645 * The writer process only extends qcount and qtail. We could copy
646 * them and use the copies to do the copying out of the queue.
647 */
648
649 while ((sc->qcount > 0) && (uio->uio_resid > 0)) {
650 l = (sc->qcount < uio->uio_resid? sc->qcount:uio->uio_resid);
651 if (l > sizeof(buf))
652 l = sizeof(buf);
653 if (l > sizeof(sc->qbuf) - sc->qtail) /* transfer till end of buf */
654 l = sizeof(sc->qbuf) - sc->qtail;
655
656 crit_exit();
657 uiomove(&sc->qbuf[sc->qtail], l, uio);
658 crit_enter();
659
660 if ( sc->qcount - l < 0 ) {
661 DPRINTF(("qcount below 0, count=%d l=%d\n", sc->qcount, l));
662 sc->qcount = l;
663 }
664 sc->qcount -= l; /* remove the bytes from the buffer */
665 sc->qtail = (sc->qtail + l) % sizeof(sc->qbuf);
666 }
667 crit_exit();
668
669 return 0;
670 }
671
672 static int
673 ums_poll(struct dev_poll_args *ap)
674 {
675 cdev_t dev = ap->a_head.a_dev;
676 struct ums_softc *sc;
677 int revents = 0;
678
679 sc = devclass_get_softc(ums_devclass, UMSUNIT(dev));
680
681 if (!sc) {
682 ap->a_events = 0;
683 return 0;
684 }
685
686 crit_enter();
687 if (ap->a_events & (POLLIN | POLLRDNORM)) {
688 if (sc->qcount) {
689 revents = ap->a_events & (POLLIN | POLLRDNORM);
690 } else {
691 sc->state |= UMS_SELECT;
692 selrecord(curthread, &sc->rsel);
693 }
694 }
695 crit_exit();
696 ap->a_events = revents;
697 return (0);
698 }
699
700 int
701 ums_ioctl(struct dev_ioctl_args *ap)
702 {
703 cdev_t dev = ap->a_head.a_dev;
704 struct ums_softc *sc;
705 int error = 0;
706 mousemode_t mode;
707
708 sc = devclass_get_softc(ums_devclass, UMSUNIT(dev));
709
710 if (!sc)
711 return EIO;
712
713 switch(ap->a_cmd) {
714 case MOUSE_GETHWINFO:
715 *(mousehw_t *)ap->a_data = sc->hw;
716 break;
717 case MOUSE_GETMODE:
718 *(mousemode_t *)ap->a_data = sc->mode;
719 break;
720 case MOUSE_SETMODE:
721 mode = *(mousemode_t *)ap->a_data;
722
723 if (mode.level == -1)
724 /* don't change the current setting */
725 ;
726 else if ((mode.level < 0) || (mode.level > 1))
727 return (EINVAL);
728
729 crit_enter();
730 sc->mode.level = mode.level;
731
732 if (sc->mode.level == 0) {
733 if (sc->nbuttons > MOUSE_MSC_MAXBUTTON)
734 sc->hw.buttons = MOUSE_MSC_MAXBUTTON;
735 else
736 sc->hw.buttons = sc->nbuttons;
737 sc->mode.protocol = MOUSE_PROTO_MSC;
738 sc->mode.packetsize = MOUSE_MSC_PACKETSIZE;
739 sc->mode.syncmask[0] = MOUSE_MSC_SYNCMASK;
740 sc->mode.syncmask[1] = MOUSE_MSC_SYNC;
741 } else if (sc->mode.level == 1) {
742 if (sc->nbuttons > MOUSE_SYS_MAXBUTTON)
743 sc->hw.buttons = MOUSE_SYS_MAXBUTTON;
744 else
745 sc->hw.buttons = sc->nbuttons;
746 sc->mode.protocol = MOUSE_PROTO_SYSMOUSE;
747 sc->mode.packetsize = MOUSE_SYS_PACKETSIZE;
748 sc->mode.syncmask[0] = MOUSE_SYS_SYNCMASK;
749 sc->mode.syncmask[1] = MOUSE_SYS_SYNC;
750 }
751
752 bzero(sc->qbuf, sizeof(sc->qbuf));
753 sc->qhead = sc->qtail = sc->qcount = 0;
754 crit_exit();
755
756 break;
757 case MOUSE_GETLEVEL:
758 *(int *)ap->a_data = sc->mode.level;
759 break;
760 case MOUSE_SETLEVEL:
761 if (*(int *)ap->a_data < 0 || *(int *)ap->a_data > 1)
762 return (EINVAL);
763
764 crit_enter();
765 sc->mode.level = *(int *)ap->a_data;
766
767 if (sc->mode.level == 0) {
768 if (sc->nbuttons > MOUSE_MSC_MAXBUTTON)
769 sc->hw.buttons = MOUSE_MSC_MAXBUTTON;
770 else
771 sc->hw.buttons = sc->nbuttons;
772 sc->mode.protocol = MOUSE_PROTO_MSC;
773 sc->mode.packetsize = MOUSE_MSC_PACKETSIZE;
774 sc->mode.syncmask[0] = MOUSE_MSC_SYNCMASK;
775 sc->mode.syncmask[1] = MOUSE_MSC_SYNC;
776 } else if (sc->mode.level == 1) {
777 if (sc->nbuttons > MOUSE_SYS_MAXBUTTON)
778 sc->hw.buttons = MOUSE_SYS_MAXBUTTON;
779 else
780 sc->hw.buttons = sc->nbuttons;
781 sc->mode.protocol = MOUSE_PROTO_SYSMOUSE;
782 sc->mode.packetsize = MOUSE_SYS_PACKETSIZE;
783 sc->mode.syncmask[0] = MOUSE_SYS_SYNCMASK;
784 sc->mode.syncmask[1] = MOUSE_SYS_SYNC;
785 }
786
787 bzero(sc->qbuf, sizeof(sc->qbuf));
788 sc->qhead = sc->qtail = sc->qcount = 0;
789 crit_exit();
790
791 break;
792 case MOUSE_GETSTATUS: {
793 mousestatus_t *status = (mousestatus_t *) ap->a_data;
794
795 crit_enter();
796 *status = sc->status;
797 sc->status.obutton = sc->status.button;
798 sc->status.button = 0;
799 sc->status.dx = sc->status.dy = sc->status.dz = 0;
800 crit_exit();
801
802 if (status->dx || status->dy || status->dz)
803 status->flags |= MOUSE_POSCHANGED;
804 if (status->button != status->obutton)
805 status->flags |= MOUSE_BUTTONSCHANGED;
806 break;
807 }
808 default:
809 error = ENOTTY;
810 }
811
812 return error;
813 }
814
815 DRIVER_MODULE(ums, uhub, ums_driver, ums_devclass, usbd_driver_load, 0);
DragonFly BSD