1/* $NetBSD: umodem_common.c,v 1.24 2016/07/07 06:55:42 msaitoh Exp $ */
2
3/*
4 * Copyright (c) 1998 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Lennart Augustsson (lennart@augustsson.net) at
9 * Carlstedt Research & Technology.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/*
34 * Comm Class spec: http://www.usb.org/developers/devclass_docs/usbccs10.pdf
35 * http://www.usb.org/developers/devclass_docs/usbcdc11.pdf
36 */
37
38/*
39 * TODO:
40 * - Add error recovery in various places; the big problem is what
41 * to do in a callback if there is an error.
42 * - Implement a Call Device for modems without multiplexed commands.
43 *
44 */
45
46#include <sys/cdefs.h>
47__KERNEL_RCSID(0, "$NetBSD: umodem_common.c,v 1.24 2016/07/07 06:55:42 msaitoh Exp $");
48
49#include <sys/param.h>
50#include <sys/systm.h>
51#include <sys/kernel.h>
52#include <sys/ioctl.h>
53#include <sys/conf.h>
54#include <sys/tty.h>
55#include <sys/file.h>
56#include <sys/select.h>
57#include <sys/proc.h>
58#include <sys/vnode.h>
59#include <sys/device.h>
60#include <sys/poll.h>
61
62#include <dev/usb/usb.h>
63#include <dev/usb/usbcdc.h>
64
65#include <dev/usb/usbdi.h>
66#include <dev/usb/usbdi_util.h>
67#include <dev/usb/usbdevs.h>
68#include <dev/usb/usb_quirks.h>
69
70#include <dev/usb/ucomvar.h>
71#include <dev/usb/umodemvar.h>
72
73#ifdef UMODEM_DEBUG
74#define DPRINTFN(n, x) if (umodemdebug > (n)) printf x
75int umodemdebug = 0;
76#else
77#define DPRINTFN(n, x)
78#endif
79#define DPRINTF(x) DPRINTFN(0, x)
80
81/*
82 * These are the maximum number of bytes transferred per frame.
83 * If some really high speed devices should use this driver they
84 * may need to be increased, but this is good enough for normal modems.
85 *
86 * Note: increased from 64/256, to better support EVDO wireless PPP.
87 * The sizes should not be increased further, or there
88 * will be problems with contiguous storage allocation.
89 */
90#define UMODEMIBUFSIZE 4096
91#define UMODEMOBUFSIZE 4096
92
93Static usbd_status umodem_set_comm_feature(struct umodem_softc *,
94 int, int);
95Static usbd_status umodem_set_line_coding(struct umodem_softc *,
96 usb_cdc_line_state_t *);
97
98Static void umodem_dtr(struct umodem_softc *, int);
99Static void umodem_rts(struct umodem_softc *, int);
100Static void umodem_break(struct umodem_softc *, int);
101Static void umodem_set_line_state(struct umodem_softc *);
102Static void umodem_intr(struct usbd_xfer *, void *, usbd_status);
103
104int
105umodem_common_attach(device_t self, struct umodem_softc *sc,
106 struct usbif_attach_arg *uiaa, struct ucom_attach_args *ucaa)
107{
108 struct usbd_device *dev = uiaa->uiaa_device;
109 usb_interface_descriptor_t *id;
110 usb_endpoint_descriptor_t *ed;
111 char *devinfop;
112 usbd_status err;
113 int data_ifcno;
114 int i;
115
116 sc->sc_dev = self;
117 sc->sc_udev = dev;
118 sc->sc_ctl_iface = uiaa->uiaa_iface;
119
120 aprint_naive("\n");
121 aprint_normal("\n");
122
123 id = usbd_get_interface_descriptor(sc->sc_ctl_iface);
124 devinfop = usbd_devinfo_alloc(uiaa->uiaa_device, 0);
125 aprint_normal_dev(self, "%s, iclass %d/%d\n",
126 devinfop, id->bInterfaceClass, id->bInterfaceSubClass);
127 usbd_devinfo_free(devinfop);
128
129 sc->sc_ctl_iface_no = id->bInterfaceNumber;
130
131 /* Get the data interface no. */
132 sc->sc_data_iface_no = data_ifcno =
133 umodem_get_caps(dev, &sc->sc_cm_cap, &sc->sc_acm_cap, id);
134
135 if (data_ifcno == -1) {
136 aprint_error_dev(self, "no pointer to data interface\n");
137 goto bad;
138 }
139
140 aprint_normal_dev(self,
141 "data interface %d, has %sCM over data, has %sbreak\n",
142 data_ifcno, sc->sc_cm_cap & USB_CDC_CM_OVER_DATA ? "" : "no ",
143 sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK ? "" : "no ");
144
145 /* Get the data interface too. */
146 for (i = 0; i < uiaa->uiaa_nifaces; i++) {
147 if (uiaa->uiaa_ifaces[i] != NULL) {
148 id = usbd_get_interface_descriptor(uiaa->uiaa_ifaces[i]);
149 if (id != NULL && id->bInterfaceNumber == data_ifcno) {
150 sc->sc_data_iface = uiaa->uiaa_ifaces[i];
151 uiaa->uiaa_ifaces[i] = NULL;
152 }
153 }
154 }
155 if (sc->sc_data_iface == NULL) {
156 aprint_error_dev(self, "no data interface\n");
157 goto bad;
158 }
159
160 /*
161 * Find the bulk endpoints.
162 * Iterate over all endpoints in the data interface and take note.
163 */
164 ucaa->ucaa_bulkin = ucaa->ucaa_bulkout = -1;
165
166 id = usbd_get_interface_descriptor(sc->sc_data_iface);
167 for (i = 0; i < id->bNumEndpoints; i++) {
168 ed = usbd_interface2endpoint_descriptor(sc->sc_data_iface, i);
169 if (ed == NULL) {
170 aprint_error_dev(self,
171 "no endpoint descriptor for %d\n)", i);
172 goto bad;
173 }
174 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
175 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) {
176 ucaa->ucaa_bulkin = ed->bEndpointAddress;
177 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
178 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) {
179 ucaa->ucaa_bulkout = ed->bEndpointAddress;
180 }
181 }
182
183 if (ucaa->ucaa_bulkin == -1) {
184 aprint_error_dev(self, "Could not find data bulk in\n");
185 goto bad;
186 }
187 if (ucaa->ucaa_bulkout == -1) {
188 aprint_error_dev(self, "Could not find data bulk out\n");
189 goto bad;
190 }
191
192 if (usbd_get_quirks(sc->sc_udev)->uq_flags & UQ_ASSUME_CM_OVER_DATA) {
193 sc->sc_cm_over_data = 1;
194 } else {
195 if (sc->sc_cm_cap & USB_CDC_CM_OVER_DATA) {
196 if (sc->sc_acm_cap & USB_CDC_ACM_HAS_FEATURE)
197 err = umodem_set_comm_feature(sc,
198 UCDC_ABSTRACT_STATE, UCDC_DATA_MULTIPLEXED);
199 else
200 err = 0;
201 if (err) {
202 aprint_error_dev(self,
203 "could not set data multiplex mode\n");
204 goto bad;
205 }
206 sc->sc_cm_over_data = 1;
207 }
208 }
209
210 /*
211 * The standard allows for notification messages (to indicate things
212 * like a modem hangup) to come in via an interrupt endpoint
213 * off of the control interface. Iterate over the endpoints on
214 * the control interface and see if there are any interrupt
215 * endpoints; if there are, then register it.
216 */
217
218 sc->sc_ctl_notify = -1;
219 sc->sc_notify_pipe = NULL;
220
221 id = usbd_get_interface_descriptor(sc->sc_ctl_iface);
222 for (i = 0; i < id->bNumEndpoints; i++) {
223 ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i);
224 if (ed == NULL)
225 continue;
226
227 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
228 (ed->bmAttributes & UE_XFERTYPE) == UE_INTERRUPT) {
229 aprint_error_dev(self,
230 "status change notification available\n");
231 sc->sc_ctl_notify = ed->bEndpointAddress;
232 }
233 }
234
235 sc->sc_dtr = -1;
236
237 /* ucaa_bulkin, ucaa_bulkout set above */
238 ucaa->ucaa_ibufsize = UMODEMIBUFSIZE;
239 ucaa->ucaa_obufsize = UMODEMOBUFSIZE;
240 ucaa->ucaa_ibufsizepad = UMODEMIBUFSIZE;
241 ucaa->ucaa_opkthdrlen = 0;
242 ucaa->ucaa_device = sc->sc_udev;
243 ucaa->ucaa_iface = sc->sc_data_iface;
244 ucaa->ucaa_arg = sc;
245
246 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev);
247
248 DPRINTF(("umodem_common_attach: sc=%p\n", sc));
249 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, ucaa,
250 ucomprint, ucomsubmatch);
251
252 return 0;
253
254 bad:
255 sc->sc_dying = 1;
256 return 1;
257}
258
259int
260umodem_open(void *addr, int portno)
261{
262 struct umodem_softc *sc = addr;
263 int err;
264
265 DPRINTF(("umodem_open: sc=%p\n", sc));
266
267 if (sc->sc_ctl_notify != -1 && sc->sc_notify_pipe == NULL) {
268 err = usbd_open_pipe_intr(sc->sc_ctl_iface, sc->sc_ctl_notify,
269 USBD_SHORT_XFER_OK, &sc->sc_notify_pipe, sc,
270 &sc->sc_notify_buf, sizeof(sc->sc_notify_buf),
271 umodem_intr, USBD_DEFAULT_INTERVAL);
272
273 if (err) {
274 DPRINTF(("Failed to establish notify pipe: %s\n",
275 usbd_errstr(err)));
276 return EIO;
277 }
278 }
279
280 return 0;
281}
282
283void
284umodem_close(void *addr, int portno)
285{
286 struct umodem_softc *sc = addr;
287 int err;
288
289 DPRINTF(("umodem_close: sc=%p\n", sc));
290
291 if (sc->sc_notify_pipe != NULL) {
292 err = usbd_abort_pipe(sc->sc_notify_pipe);
293 if (err)
294 printf("%s: abort notify pipe failed: %s\n",
295 device_xname(sc->sc_dev), usbd_errstr(err));
296 err = usbd_close_pipe(sc->sc_notify_pipe);
297 if (err)
298 printf("%s: close notify pipe failed: %s\n",
299 device_xname(sc->sc_dev), usbd_errstr(err));
300 sc->sc_notify_pipe = NULL;
301 }
302}
303
304Static void
305umodem_intr(struct usbd_xfer *xfer, void *priv,
306 usbd_status status)
307{
308 struct umodem_softc *sc = priv;
309 u_char mstatus;
310
311 if (sc->sc_dying)
312 return;
313
314 if (status != USBD_NORMAL_COMPLETION) {
315 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
316 return;
317 printf("%s: abnormal status: %s\n", device_xname(sc->sc_dev),
318 usbd_errstr(status));
319 if (status == USBD_STALLED)
320 usbd_clear_endpoint_stall_async(sc->sc_notify_pipe);
321 return;
322 }
323
324 if (sc->sc_notify_buf.bmRequestType != UCDC_NOTIFICATION) {
325 DPRINTF(("%s: unknown message type (%02x) on notify pipe\n",
326 device_xname(sc->sc_dev),
327 sc->sc_notify_buf.bmRequestType));
328 return;
329 }
330
331 switch (sc->sc_notify_buf.bNotification) {
332 case UCDC_N_SERIAL_STATE:
333 /*
334 * Set the serial state in ucom driver based on
335 * the bits from the notify message
336 */
337 if (UGETW(sc->sc_notify_buf.wLength) != 2) {
338 printf("%s: Invalid notification length! (%d)\n",
339 device_xname(sc->sc_dev),
340 UGETW(sc->sc_notify_buf.wLength));
341 break;
342 }
343 DPRINTF(("%s: notify bytes = %02x%02x\n",
344 device_xname(sc->sc_dev),
345 sc->sc_notify_buf.data[0],
346 sc->sc_notify_buf.data[1]));
347 /* Currently, lsr is always zero. */
348 sc->sc_lsr = sc->sc_msr = 0;
349 mstatus = sc->sc_notify_buf.data[0];
350
351 if (ISSET(mstatus, UCDC_N_SERIAL_RI))
352 sc->sc_msr |= UMSR_RI;
353 if (ISSET(mstatus, UCDC_N_SERIAL_DSR))
354 sc->sc_msr |= UMSR_DSR;
355 if (ISSET(mstatus, UCDC_N_SERIAL_DCD))
356 sc->sc_msr |= UMSR_DCD;
357 ucom_status_change(device_private(sc->sc_subdev));
358 break;
359 default:
360 DPRINTF(("%s: unknown notify message: %02x\n",
361 device_xname(sc->sc_dev),
362 sc->sc_notify_buf.bNotification));
363 break;
364 }
365}
366
367int
368umodem_get_caps(struct usbd_device *dev, int *cm, int *acm,
369 usb_interface_descriptor_t *id)
370{
371 const usb_cdc_cm_descriptor_t *cmd;
372 const usb_cdc_acm_descriptor_t *cad;
373 const usb_cdc_union_descriptor_t *cud;
374 uint32_t uq_flags;
375
376 *cm = *acm = 0;
377 uq_flags = usbd_get_quirks(dev)->uq_flags;
378
379 if (uq_flags & UQ_NO_UNION_NRM) {
380 DPRINTF(("umodem_get_caps: NO_UNION_NRM quirk - returning 0\n"));
381 return 0;
382 }
383
384 if (uq_flags & UQ_LOST_CS_DESC)
385 id = NULL;
386
387 cmd = (const usb_cdc_cm_descriptor_t *)usb_find_desc_if(dev,
388 UDESC_CS_INTERFACE,
389 UDESCSUB_CDC_CM, id);
390 if (cmd == NULL) {
391 DPRINTF(("umodem_get_caps: no CM desc\n"));
392 } else {
393 *cm = cmd->bmCapabilities;
394 }
395
396 cad = (const usb_cdc_acm_descriptor_t *)usb_find_desc_if(dev,
397 UDESC_CS_INTERFACE,
398 UDESCSUB_CDC_ACM,
399 id);
400 if (cad == NULL) {
401 DPRINTF(("umodem_get_caps: no ACM desc\n"));
402 } else {
403 *acm = cad->bmCapabilities;
404 }
405
406 cud = (const usb_cdc_union_descriptor_t *)usb_find_desc_if(dev,
407 UDESC_CS_INTERFACE,
408 UDESCSUB_CDC_UNION,
409 id);
410 if (cud == NULL) {
411 DPRINTF(("umodem_get_caps: no UNION desc\n"));
412 }
413
414 return cmd ? cmd->bDataInterface : cud ? cud->bSlaveInterface[0] : -1;
415}
416
417void
418umodem_get_status(void *addr, int portno, u_char *lsr, u_char *msr)
419{
420 struct umodem_softc *sc = addr;
421
422 DPRINTF(("umodem_get_status:\n"));
423
424 if (lsr != NULL)
425 *lsr = sc->sc_lsr;
426 if (msr != NULL)
427 *msr = sc->sc_msr;
428}
429
430int
431umodem_param(void *addr, int portno, struct termios *t)
432{
433 struct umodem_softc *sc = addr;
434 usbd_status err;
435 usb_cdc_line_state_t ls;
436
437 DPRINTF(("umodem_param: sc=%p\n", sc));
438
439 USETDW(ls.dwDTERate, t->c_ospeed);
440 if (ISSET(t->c_cflag, CSTOPB))
441 ls.bCharFormat = UCDC_STOP_BIT_2;
442 else
443 ls.bCharFormat = UCDC_STOP_BIT_1;
444 if (ISSET(t->c_cflag, PARENB)) {
445 if (ISSET(t->c_cflag, PARODD))
446 ls.bParityType = UCDC_PARITY_ODD;
447 else
448 ls.bParityType = UCDC_PARITY_EVEN;
449 } else
450 ls.bParityType = UCDC_PARITY_NONE;
451 switch (ISSET(t->c_cflag, CSIZE)) {
452 case CS5:
453 ls.bDataBits = 5;
454 break;
455 case CS6:
456 ls.bDataBits = 6;
457 break;
458 case CS7:
459 ls.bDataBits = 7;
460 break;
461 case CS8:
462 ls.bDataBits = 8;
463 break;
464 }
465
466 err = umodem_set_line_coding(sc, &ls);
467 if (err) {
468 DPRINTF(("umodem_param: err=%s\n", usbd_errstr(err)));
469 return EPASSTHROUGH;
470 }
471 return 0;
472}
473
474int
475umodem_ioctl(void *addr, int portno, u_long cmd, void *data,
476 int flag, proc_t *p)
477{
478 struct umodem_softc *sc = addr;
479 int error = 0;
480
481 if (sc->sc_dying)
482 return EIO;
483
484 DPRINTF(("umodem_ioctl: cmd=0x%08lx\n", cmd));
485
486 switch (cmd) {
487 case USB_GET_CM_OVER_DATA:
488 *(int *)data = sc->sc_cm_over_data;
489 break;
490
491 case USB_SET_CM_OVER_DATA:
492 if (*(int *)data != sc->sc_cm_over_data) {
493 /* XXX change it */
494 }
495 break;
496
497 default:
498 DPRINTF(("umodem_ioctl: unknown\n"));
499 error = EPASSTHROUGH;
500 break;
501 }
502
503 return error;
504}
505
506void
507umodem_dtr(struct umodem_softc *sc, int onoff)
508{
509 DPRINTF(("umodem_dtr: onoff=%d\n", onoff));
510
511 if (sc->sc_dtr == onoff)
512 return;
513 sc->sc_dtr = onoff;
514
515 umodem_set_line_state(sc);
516}
517
518void
519umodem_rts(struct umodem_softc *sc, int onoff)
520{
521 DPRINTF(("umodem_rts: onoff=%d\n", onoff));
522
523 if (sc->sc_rts == onoff)
524 return;
525 sc->sc_rts = onoff;
526
527 umodem_set_line_state(sc);
528}
529
530void
531umodem_set_line_state(struct umodem_softc *sc)
532{
533 usb_device_request_t req;
534 int ls;
535
536 ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) |
537 (sc->sc_rts ? UCDC_LINE_RTS : 0);
538 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
539 req.bRequest = UCDC_SET_CONTROL_LINE_STATE;
540 USETW(req.wValue, ls);
541 USETW(req.wIndex, sc->sc_ctl_iface_no);
542 USETW(req.wLength, 0);
543
544 (void)usbd_do_request(sc->sc_udev, &req, 0);
545
546}
547
548void
549umodem_break(struct umodem_softc *sc, int onoff)
550{
551 usb_device_request_t req;
552
553 DPRINTF(("umodem_break: onoff=%d\n", onoff));
554
555 if (!(sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK))
556 return;
557
558 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
559 req.bRequest = UCDC_SEND_BREAK;
560 USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF);
561 USETW(req.wIndex, sc->sc_ctl_iface_no);
562 USETW(req.wLength, 0);
563
564 (void)usbd_do_request(sc->sc_udev, &req, 0);
565}
566
567void
568umodem_set(void *addr, int portno, int reg, int onoff)
569{
570 struct umodem_softc *sc = addr;
571
572 switch (reg) {
573 case UCOM_SET_DTR:
574 umodem_dtr(sc, onoff);
575 break;
576 case UCOM_SET_RTS:
577 umodem_rts(sc, onoff);
578 break;
579 case UCOM_SET_BREAK:
580 umodem_break(sc, onoff);
581 break;
582 default:
583 break;
584 }
585}
586
587usbd_status
588umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state)
589{
590 usb_device_request_t req;
591 usbd_status err;
592
593 DPRINTF(("umodem_set_line_coding: rate=%d fmt=%d parity=%d bits=%d\n",
594 UGETDW(state->dwDTERate), state->bCharFormat,
595 state->bParityType, state->bDataBits));
596
597 if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) {
598 DPRINTF(("umodem_set_line_coding: already set\n"));
599 return USBD_NORMAL_COMPLETION;
600 }
601
602 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
603 req.bRequest = UCDC_SET_LINE_CODING;
604 USETW(req.wValue, 0);
605 USETW(req.wIndex, sc->sc_ctl_iface_no);
606 USETW(req.wLength, UCDC_LINE_STATE_LENGTH);
607
608 err = usbd_do_request(sc->sc_udev, &req, state);
609 if (err) {
610 DPRINTF(("umodem_set_line_coding: failed, err=%s\n",
611 usbd_errstr(err)));
612 return err;
613 }
614
615 sc->sc_line_state = *state;
616
617 return USBD_NORMAL_COMPLETION;
618}
619
620usbd_status
621umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state)
622{
623 usb_device_request_t req;
624 usbd_status err;
625 usb_cdc_abstract_state_t ast;
626
627 DPRINTF(("umodem_set_comm_feature: feature=%d state=%d\n", feature,
628 state));
629
630 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
631 req.bRequest = UCDC_SET_COMM_FEATURE;
632 USETW(req.wValue, feature);
633 USETW(req.wIndex, sc->sc_ctl_iface_no);
634 USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH);
635 USETW(ast.wState, state);
636
637 err = usbd_do_request(sc->sc_udev, &req, &ast);
638 if (err) {
639 DPRINTF(("umodem_set_comm_feature: feature=%d, err=%s\n",
640 feature, usbd_errstr(err)));
641 return err;
642 }
643
644 return USBD_NORMAL_COMPLETION;
645}
646
647int
648umodem_common_activate(struct umodem_softc *sc, enum devact act)
649{
650 switch (act) {
651 case DVACT_DEACTIVATE:
652 sc->sc_dying = 1;
653 return 0;
654 default:
655 return EOPNOTSUPP;
656 }
657}
658
659void
660umodem_common_childdet(struct umodem_softc *sc, device_t child)
661{
662 KASSERT(sc->sc_subdev == child);
663 sc->sc_subdev = NULL;
664}
665
666int
667umodem_common_detach(struct umodem_softc *sc, int flags)
668{
669 int rv = 0;
670
671 DPRINTF(("umodem_common_detach: sc=%p flags=%d\n", sc, flags));
672
673 sc->sc_dying = 1;
674
675 if (sc->sc_subdev != NULL)
676 rv = config_detach(sc->sc_subdev, flags);
677
678 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev);
679
680 return rv;
681}
682