1 /* $NetBSD: umodem_common.c,v 1.36 2022/07/31 13:01:16 mlelstv 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 1.36 2022/07/31 13:01:16 mlelstv Exp $");
48
49 #ifdef _KERNEL_OPT
50 #include "opt_usb.h"
51 #endif
52
53 #include <sys/param.h>
54 #include <sys/systm.h>
55 #include <sys/kernel.h>
56 #include <sys/ioctl.h>
57 #include <sys/conf.h>
58 #include <sys/tty.h>
59 #include <sys/file.h>
60 #include <sys/select.h>
61 #include <sys/proc.h>
62 #include <sys/vnode.h>
63 #include <sys/device.h>
64 #include <sys/poll.h>
65
66 #include <dev/usb/usb.h>
67 #include <dev/usb/usbcdc.h>
68
69 #include <dev/usb/usbdi.h>
70 #include <dev/usb/usbdi_util.h>
71 #include <dev/usb/usbdivar.h>
72 #include <dev/usb/usbdevs.h>
73 #include <dev/usb/usb_quirks.h>
74
75 #include <dev/usb/ucomvar.h>
76 #include <dev/usb/umodemvar.h>
77
78 #ifdef UMODEM_DEBUG
79 #define DPRINTFN(n, x) if (umodemdebug > (n)) printf x
80 int umodemdebug = 0;
81 #else
82 #define DPRINTFN(n, x)
83 #endif
84 #define DPRINTF(x) DPRINTFN(0, x)
85
86 /*
87 * These are the maximum number of bytes transferred per frame.
88 * If some really high speed devices should use this driver they
89 * may need to be increased, but this is good enough for normal modems.
90 *
91 * Note: increased from 64/256, to better support EVDO wireless PPP.
92 * The sizes should not be increased further, or there
93 * will be problems with contiguous storage allocation.
94 */
95 #define UMODEMIBUFSIZE 4096
96 #define UMODEMOBUFSIZE 4096
97
98 static usbd_status umodem_set_comm_feature(struct umodem_softc *,
99 int, int);
100 static usbd_status umodem_set_line_coding(struct umodem_softc *,
101 usb_cdc_line_state_t *);
102
103 static void umodem_dtr(struct umodem_softc *, int);
104 static void umodem_rts(struct umodem_softc *, int);
105 static void umodem_break(struct umodem_softc *, int);
106 static void umodem_set_line_state(struct umodem_softc *);
107 static void umodem_intr(struct usbd_xfer *, void *, usbd_status);
108
109 /*
110 * NOTE: Callers of umodem_common_attach() should initialise their ucaa
111 * to 0 before assigning any fields. ucaa_ibufsize, ucaa_ibufsize and
112 * ucaa_obufsize may be set by the caller, but if 0 are set to default
113 * umodem values.
114 */
115 int
umodem_common_attach(device_t self,struct umodem_softc * sc,struct usbif_attach_arg * uiaa,struct ucom_attach_args * ucaa)116 umodem_common_attach(device_t self, struct umodem_softc *sc,
117 struct usbif_attach_arg *uiaa, struct ucom_attach_args *ucaa)
118 {
119 struct usbd_device *dev = uiaa->uiaa_device;
120 usb_interface_descriptor_t *id;
121 usb_endpoint_descriptor_t *ed;
122 char *devinfop;
123 usbd_status err;
124 int data_ifcno;
125 int i;
126
127 sc->sc_dev = self;
128 sc->sc_udev = dev;
129 sc->sc_ctl_iface = uiaa->uiaa_iface;
130 sc->sc_dying = false;
131
132 aprint_naive("\n");
133 aprint_normal("\n");
134
135 id = usbd_get_interface_descriptor(sc->sc_ctl_iface);
136 devinfop = usbd_devinfo_alloc(uiaa->uiaa_device, 0);
137 aprint_normal_dev(self, "%s, iclass %d/%d\n",
138 devinfop, id->bInterfaceClass, id->bInterfaceSubClass);
139 usbd_devinfo_free(devinfop);
140
141 sc->sc_ctl_iface_no = id->bInterfaceNumber;
142
143 /* Get the data interface no. */
144 sc->sc_data_iface_no = data_ifcno =
145 umodem_get_caps(dev, &sc->sc_cm_cap, &sc->sc_acm_cap, id);
146
147 if (data_ifcno == -1) {
148 aprint_error_dev(self, "no pointer to data interface\n");
149 goto bad;
150 }
151
152 aprint_normal_dev(self,
153 "data interface %d, has %sCM over data, has %sbreak\n",
154 data_ifcno, sc->sc_cm_cap & USB_CDC_CM_OVER_DATA ? "" : "no ",
155 sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK ? "" : "no ");
156
157 /* Get the data interface too. */
158 for (i = 0; i < uiaa->uiaa_nifaces; i++) {
159 if (uiaa->uiaa_ifaces[i] != NULL) {
160 id = usbd_get_interface_descriptor(uiaa->uiaa_ifaces[i]);
161 if (id != NULL && id->bInterfaceNumber == data_ifcno) {
162 sc->sc_data_iface = uiaa->uiaa_ifaces[i];
163 uiaa->uiaa_ifaces[i] = NULL;
164 }
165 }
166 }
167 if (sc->sc_data_iface == NULL) {
168 aprint_error_dev(self, "no data interface\n");
169 goto bad;
170 }
171
172 /*
173 * Find the bulk endpoints.
174 * Iterate over all endpoints in the data interface and take note.
175 */
176 ucaa->ucaa_bulkin = ucaa->ucaa_bulkout = -1;
177
178 id = usbd_get_interface_descriptor(sc->sc_data_iface);
179 for (i = 0; i < id->bNumEndpoints; i++) {
180 ed = usbd_interface2endpoint_descriptor(sc->sc_data_iface, i);
181 if (ed == NULL) {
182 aprint_error_dev(self,
183 "no endpoint descriptor for %d\n)", i);
184 goto bad;
185 }
186 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
187 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) {
188 ucaa->ucaa_bulkin = ed->bEndpointAddress;
189 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
190 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) {
191 ucaa->ucaa_bulkout = ed->bEndpointAddress;
192 }
193 }
194
195 if (ucaa->ucaa_bulkin == -1) {
196 aprint_error_dev(self, "Could not find data bulk in\n");
197 goto bad;
198 }
199 if (ucaa->ucaa_bulkout == -1) {
200 aprint_error_dev(self, "Could not find data bulk out\n");
201 goto bad;
202 }
203
204 if (usbd_get_quirks(sc->sc_udev)->uq_flags & UQ_ASSUME_CM_OVER_DATA) {
205 sc->sc_cm_over_data = 1;
206 } else {
207 if (sc->sc_cm_cap & USB_CDC_CM_OVER_DATA) {
208 if (sc->sc_acm_cap & USB_CDC_ACM_HAS_FEATURE)
209 err = umodem_set_comm_feature(sc,
210 UCDC_ABSTRACT_STATE, UCDC_DATA_MULTIPLEXED);
211 else
212 err = 0;
213 if (err) {
214 aprint_error_dev(self,
215 "could not set data multiplex mode\n");
216 goto bad;
217 }
218 sc->sc_cm_over_data = 1;
219 }
220 }
221
222 /*
223 * The standard allows for notification messages (to indicate things
224 * like a modem hangup) to come in via an interrupt endpoint
225 * off of the control interface. Iterate over the endpoints on
226 * the control interface and see if there are any interrupt
227 * endpoints; if there are, then register it.
228 */
229
230 sc->sc_ctl_notify = -1;
231 sc->sc_notify_pipe = NULL;
232
233 id = usbd_get_interface_descriptor(sc->sc_ctl_iface);
234 for (i = 0; i < id->bNumEndpoints; i++) {
235 ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i);
236 if (ed == NULL)
237 continue;
238
239 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
240 (ed->bmAttributes & UE_XFERTYPE) == UE_INTERRUPT) {
241 aprint_verbose_dev(self,
242 "status change notification available\n");
243 sc->sc_ctl_notify = ed->bEndpointAddress;
244 }
245 }
246
247 sc->sc_dtr = -1;
248
249 /*
250 * ucaa_bulkin, ucaa_bulkout set above. ucaa_ibufsize,
251 * ucaa_ibufsize, ucaa_obufsize may be initialised by caller
252 */
253 if (ucaa->ucaa_ibufsize == 0)
254 ucaa->ucaa_ibufsize = UMODEMIBUFSIZE;
255 if (ucaa->ucaa_obufsize == 0)
256 ucaa->ucaa_obufsize = UMODEMOBUFSIZE;
257 if (ucaa->ucaa_ibufsizepad == 0)
258 ucaa->ucaa_ibufsizepad = UMODEMIBUFSIZE;
259 ucaa->ucaa_opkthdrlen = 0;
260 ucaa->ucaa_device = sc->sc_udev;
261 ucaa->ucaa_iface = sc->sc_data_iface;
262 ucaa->ucaa_arg = sc;
263
264 /*
265 * Each port takes two interfaces (control and data).
266 *
267 * If no port number is assigned by the specific driver,
268 * use the interface to compute a logical port number.
269 */
270 if (ucaa->ucaa_portno == UCOM_UNK_PORTNO)
271 ucaa->ucaa_portno = uiaa->uiaa_iface->ui_index / 2;
272
273 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev);
274
275 DPRINTF(("umodem_common_attach: sc=%p\n", sc));
276 sc->sc_subdev = config_found(self, ucaa, ucomprint,
277 CFARGS(.submatch = ucomsubmatch));
278
279 return 0;
280
281 bad:
282 sc->sc_dying = true;
283 return 1;
284 }
285
286 int
umodem_open(void * addr,int portno)287 umodem_open(void *addr, int portno)
288 {
289 struct umodem_softc *sc = addr;
290 int err;
291
292 if (sc->sc_dying)
293 return EIO;
294
295 DPRINTF(("umodem_open: sc=%p\n", sc));
296
297 if (sc->sc_ctl_notify != -1 && sc->sc_notify_pipe == NULL) {
298 err = usbd_open_pipe_intr(sc->sc_ctl_iface, sc->sc_ctl_notify,
299 USBD_SHORT_XFER_OK, &sc->sc_notify_pipe, sc,
300 &sc->sc_notify_buf, sizeof(sc->sc_notify_buf),
301 umodem_intr, USBD_DEFAULT_INTERVAL);
302
303 if (err) {
304 DPRINTF(("Failed to establish notify pipe: %s\n",
305 usbd_errstr(err)));
306 return EIO;
307 }
308 }
309
310 return 0;
311 }
312
313 static void
umodem_close_pipe(struct umodem_softc * sc)314 umodem_close_pipe(struct umodem_softc *sc)
315 {
316
317 if (sc->sc_notify_pipe != NULL) {
318 usbd_abort_pipe(sc->sc_notify_pipe);
319 usbd_close_pipe(sc->sc_notify_pipe);
320 sc->sc_notify_pipe = NULL;
321 }
322 }
323
324 void
umodem_close(void * addr,int portno)325 umodem_close(void *addr, int portno)
326 {
327 struct umodem_softc *sc = addr;
328
329 DPRINTF(("umodem_close: sc=%p\n", sc));
330
331 if (sc->sc_dying)
332 return;
333
334 umodem_close_pipe(sc);
335 }
336
337 static void
umodem_intr(struct usbd_xfer * xfer,void * priv,usbd_status status)338 umodem_intr(struct usbd_xfer *xfer, void *priv,
339 usbd_status status)
340 {
341 struct umodem_softc *sc = priv;
342 u_char mstatus;
343
344 if (sc->sc_dying)
345 return;
346
347 if (status != USBD_NORMAL_COMPLETION) {
348 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
349 return;
350 printf("%s: abnormal status: %s\n", device_xname(sc->sc_dev),
351 usbd_errstr(status));
352 if (status == USBD_STALLED)
353 usbd_clear_endpoint_stall_async(sc->sc_notify_pipe);
354 return;
355 }
356
357 if (sc->sc_notify_buf.bmRequestType != UCDC_NOTIFICATION) {
358 DPRINTF(("%s: unknown message type (%02x) on notify pipe\n",
359 device_xname(sc->sc_dev),
360 sc->sc_notify_buf.bmRequestType));
361 return;
362 }
363
364 switch (sc->sc_notify_buf.bNotification) {
365 case UCDC_N_SERIAL_STATE:
366 /*
367 * Set the serial state in ucom driver based on
368 * the bits from the notify message
369 */
370 if (UGETW(sc->sc_notify_buf.wLength) != 2) {
371 printf("%s: Invalid notification length! (%d)\n",
372 device_xname(sc->sc_dev),
373 UGETW(sc->sc_notify_buf.wLength));
374 break;
375 }
376 DPRINTF(("%s: notify bytes = %02x%02x\n",
377 device_xname(sc->sc_dev),
378 sc->sc_notify_buf.data[0],
379 sc->sc_notify_buf.data[1]));
380 /* Currently, lsr is always zero. */
381 sc->sc_lsr = sc->sc_msr = 0;
382 mstatus = sc->sc_notify_buf.data[0];
383
384 if (ISSET(mstatus, UCDC_N_SERIAL_RI))
385 sc->sc_msr |= UMSR_RI;
386 if (ISSET(mstatus, UCDC_N_SERIAL_DSR))
387 sc->sc_msr |= UMSR_DSR;
388 if (ISSET(mstatus, UCDC_N_SERIAL_DCD))
389 sc->sc_msr |= UMSR_DCD;
390 ucom_status_change(device_private(sc->sc_subdev));
391 break;
392 default:
393 DPRINTF(("%s: unknown notify message: %02x\n",
394 device_xname(sc->sc_dev),
395 sc->sc_notify_buf.bNotification));
396 break;
397 }
398 }
399
400 int
umodem_get_caps(struct usbd_device * dev,int * cm,int * acm,usb_interface_descriptor_t * id)401 umodem_get_caps(struct usbd_device *dev, int *cm, int *acm,
402 usb_interface_descriptor_t *id)
403 {
404 const usb_cdc_cm_descriptor_t *cmd;
405 const usb_cdc_acm_descriptor_t *cad;
406 const usb_cdc_union_descriptor_t *cud;
407 uint32_t uq_flags;
408
409 *cm = *acm = 0;
410 uq_flags = usbd_get_quirks(dev)->uq_flags;
411
412 if (uq_flags & UQ_NO_UNION_NRM) {
413 DPRINTF(("umodem_get_caps: NO_UNION_NRM quirk - returning 0\n"));
414 return 0;
415 }
416
417 if (uq_flags & UQ_LOST_CS_DESC)
418 id = NULL;
419
420 cmd = (const usb_cdc_cm_descriptor_t *)usb_find_desc_if(dev,
421 UDESC_CS_INTERFACE,
422 UDESCSUB_CDC_CM, id);
423 if (cmd == NULL) {
424 DPRINTF(("umodem_get_caps: no CM desc\n"));
425 } else {
426 *cm = cmd->bmCapabilities;
427 }
428
429 cad = (const usb_cdc_acm_descriptor_t *)usb_find_desc_if(dev,
430 UDESC_CS_INTERFACE,
431 UDESCSUB_CDC_ACM,
432 id);
433 if (cad == NULL) {
434 DPRINTF(("umodem_get_caps: no ACM desc\n"));
435 } else {
436 *acm = cad->bmCapabilities;
437 }
438
439 cud = (const usb_cdc_union_descriptor_t *)usb_find_desc_if(dev,
440 UDESC_CS_INTERFACE,
441 UDESCSUB_CDC_UNION,
442 id);
443 if (cud == NULL) {
444 DPRINTF(("umodem_get_caps: no UNION desc\n"));
445 }
446
447 return cmd ? cmd->bDataInterface : cud ? cud->bSlaveInterface[0] : -1;
448 }
449
450 void
umodem_get_status(void * addr,int portno,u_char * lsr,u_char * msr)451 umodem_get_status(void *addr, int portno, u_char *lsr, u_char *msr)
452 {
453 struct umodem_softc *sc = addr;
454
455 DPRINTF(("umodem_get_status:\n"));
456
457 *lsr = sc->sc_lsr;
458 *msr = sc->sc_msr;
459 }
460
461 int
umodem_param(void * addr,int portno,struct termios * t)462 umodem_param(void *addr, int portno, struct termios *t)
463 {
464 struct umodem_softc *sc = addr;
465 usbd_status err;
466 usb_cdc_line_state_t ls;
467
468 DPRINTF(("umodem_param: sc=%p\n", sc));
469
470 if (sc->sc_dying)
471 return EIO;
472
473 USETDW(ls.dwDTERate, t->c_ospeed);
474 if (ISSET(t->c_cflag, CSTOPB))
475 ls.bCharFormat = UCDC_STOP_BIT_2;
476 else
477 ls.bCharFormat = UCDC_STOP_BIT_1;
478 if (ISSET(t->c_cflag, PARENB)) {
479 if (ISSET(t->c_cflag, PARODD))
480 ls.bParityType = UCDC_PARITY_ODD;
481 else
482 ls.bParityType = UCDC_PARITY_EVEN;
483 } else
484 ls.bParityType = UCDC_PARITY_NONE;
485 switch (ISSET(t->c_cflag, CSIZE)) {
486 case CS5:
487 ls.bDataBits = 5;
488 break;
489 case CS6:
490 ls.bDataBits = 6;
491 break;
492 case CS7:
493 ls.bDataBits = 7;
494 break;
495 case CS8:
496 ls.bDataBits = 8;
497 break;
498 }
499
500 err = umodem_set_line_coding(sc, &ls);
501 if (err) {
502 DPRINTF(("umodem_param: err=%s\n", usbd_errstr(err)));
503 return EPASSTHROUGH;
504 }
505 return 0;
506 }
507
508 int
umodem_ioctl(void * addr,int portno,u_long cmd,void * data,int flag,proc_t * p)509 umodem_ioctl(void *addr, int portno, u_long cmd, void *data,
510 int flag, proc_t *p)
511 {
512 struct umodem_softc *sc = addr;
513 int error = 0;
514
515 DPRINTF(("umodem_ioctl: cmd=0x%08lx\n", cmd));
516
517 if (sc->sc_dying)
518 return EIO;
519
520 switch (cmd) {
521 case USB_GET_CM_OVER_DATA:
522 *(int *)data = sc->sc_cm_over_data;
523 break;
524
525 case USB_SET_CM_OVER_DATA:
526 if (*(int *)data != sc->sc_cm_over_data) {
527 /* XXX change it */
528 }
529 break;
530
531 default:
532 DPRINTF(("umodem_ioctl: unknown\n"));
533 error = EPASSTHROUGH;
534 break;
535 }
536
537 return error;
538 }
539
540 static void
umodem_dtr(struct umodem_softc * sc,int onoff)541 umodem_dtr(struct umodem_softc *sc, int onoff)
542 {
543 DPRINTF(("umodem_dtr: onoff=%d\n", onoff));
544
545 if (sc->sc_dtr == onoff)
546 return;
547 sc->sc_dtr = onoff;
548
549 umodem_set_line_state(sc);
550 }
551
552 static void
umodem_rts(struct umodem_softc * sc,int onoff)553 umodem_rts(struct umodem_softc *sc, int onoff)
554 {
555 DPRINTF(("umodem_rts: onoff=%d\n", onoff));
556
557 if (sc->sc_rts == onoff)
558 return;
559 sc->sc_rts = onoff;
560
561 umodem_set_line_state(sc);
562 }
563
564 static void
umodem_set_line_state(struct umodem_softc * sc)565 umodem_set_line_state(struct umodem_softc *sc)
566 {
567 usb_device_request_t req;
568 int ls;
569
570 ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) |
571 (sc->sc_rts ? UCDC_LINE_RTS : 0);
572 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
573 req.bRequest = UCDC_SET_CONTROL_LINE_STATE;
574 USETW(req.wValue, ls);
575 USETW(req.wIndex, sc->sc_ctl_iface_no);
576 USETW(req.wLength, 0);
577
578 (void)usbd_do_request(sc->sc_udev, &req, 0);
579
580 }
581
582 static void
umodem_break(struct umodem_softc * sc,int onoff)583 umodem_break(struct umodem_softc *sc, int onoff)
584 {
585 usb_device_request_t req;
586
587 DPRINTF(("umodem_break: onoff=%d\n", onoff));
588
589 if (!(sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK))
590 return;
591
592 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
593 req.bRequest = UCDC_SEND_BREAK;
594 USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF);
595 USETW(req.wIndex, sc->sc_ctl_iface_no);
596 USETW(req.wLength, 0);
597
598 (void)usbd_do_request(sc->sc_udev, &req, 0);
599 }
600
601 void
umodem_set(void * addr,int portno,int reg,int onoff)602 umodem_set(void *addr, int portno, int reg, int onoff)
603 {
604 struct umodem_softc *sc = addr;
605
606 if (sc->sc_dying)
607 return;
608
609 switch (reg) {
610 case UCOM_SET_DTR:
611 umodem_dtr(sc, onoff);
612 break;
613 case UCOM_SET_RTS:
614 umodem_rts(sc, onoff);
615 break;
616 case UCOM_SET_BREAK:
617 umodem_break(sc, onoff);
618 break;
619 default:
620 break;
621 }
622 }
623
624 static usbd_status
umodem_set_line_coding(struct umodem_softc * sc,usb_cdc_line_state_t * state)625 umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state)
626 {
627 usb_device_request_t req;
628 usbd_status err;
629
630 DPRINTF(("umodem_set_line_coding: rate=%d fmt=%d parity=%d bits=%d\n",
631 UGETDW(state->dwDTERate), state->bCharFormat,
632 state->bParityType, state->bDataBits));
633
634 if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) {
635 DPRINTF(("umodem_set_line_coding: already set\n"));
636 return USBD_NORMAL_COMPLETION;
637 }
638
639 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
640 req.bRequest = UCDC_SET_LINE_CODING;
641 USETW(req.wValue, 0);
642 USETW(req.wIndex, sc->sc_ctl_iface_no);
643 USETW(req.wLength, UCDC_LINE_STATE_LENGTH);
644
645 err = usbd_do_request(sc->sc_udev, &req, state);
646 if (err) {
647 DPRINTF(("umodem_set_line_coding: failed, err=%s\n",
648 usbd_errstr(err)));
649 return err;
650 }
651
652 sc->sc_line_state = *state;
653
654 return USBD_NORMAL_COMPLETION;
655 }
656
657 static usbd_status
umodem_set_comm_feature(struct umodem_softc * sc,int feature,int state)658 umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state)
659 {
660 usb_device_request_t req;
661 usbd_status err;
662 usb_cdc_abstract_state_t ast;
663
664 DPRINTF(("umodem_set_comm_feature: feature=%d state=%d\n", feature,
665 state));
666
667 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
668 req.bRequest = UCDC_SET_COMM_FEATURE;
669 USETW(req.wValue, feature);
670 USETW(req.wIndex, sc->sc_ctl_iface_no);
671 USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH);
672 USETW(ast.wState, state);
673
674 err = usbd_do_request(sc->sc_udev, &req, &ast);
675 if (err) {
676 DPRINTF(("umodem_set_comm_feature: feature=%d, err=%s\n",
677 feature, usbd_errstr(err)));
678 return err;
679 }
680
681 return USBD_NORMAL_COMPLETION;
682 }
683
684 void
umodem_common_childdet(struct umodem_softc * sc,device_t child)685 umodem_common_childdet(struct umodem_softc *sc, device_t child)
686 {
687 KASSERT(sc->sc_subdev == child);
688 sc->sc_subdev = NULL;
689 }
690
691 int
umodem_common_detach(struct umodem_softc * sc,int flags)692 umodem_common_detach(struct umodem_softc *sc, int flags)
693 {
694 int rv = 0;
695
696 DPRINTF(("umodem_common_detach: sc=%p flags=%d\n", sc, flags));
697
698 sc->sc_dying = true;
699
700 umodem_close_pipe(sc);
701
702 if (sc->sc_subdev != NULL) {
703 rv = config_detach(sc->sc_subdev, flags);
704 sc->sc_subdev = NULL;
705 }
706
707 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev);
708
709 return rv;
710 }
711