umodem_common.c revision 1.17
1 /* $NetBSD: umodem_common.c,v 1.17 2009/11/12 19:58:27 dyoung 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 (at) 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 1.17 2009/11/12 19:58:27 dyoung 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)) logprintf x 75 int 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 93 Static usbd_status umodem_set_comm_feature(struct umodem_softc *sc, 94 int feature, int state); 95 Static usbd_status umodem_set_line_coding(struct umodem_softc *sc, 96 usb_cdc_line_state_t *state); 97 98 Static void umodem_dtr(struct umodem_softc *, int); 99 Static void umodem_rts(struct umodem_softc *, int); 100 Static void umodem_break(struct umodem_softc *, int); 101 Static void umodem_set_line_state(struct umodem_softc *); 102 Static void umodem_intr(usbd_xfer_handle, usbd_private_handle, usbd_status); 103 104 int 105 umodem_common_attach(device_ptr_t self, struct umodem_softc *sc, 106 struct usbif_attach_arg *uaa, struct ucom_attach_args *uca) 107 { 108 usbd_device_handle dev = uaa->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 = uaa->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(uaa->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 < uaa->nifaces; i++) { 147 if (uaa->ifaces[i] != NULL) { 148 id = usbd_get_interface_descriptor(uaa->ifaces[i]); 149 if (id != NULL && id->bInterfaceNumber == data_ifcno) { 150 sc->sc_data_iface = uaa->ifaces[i]; 151 uaa->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 uca->bulkin = uca->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 uca->bulkin = ed->bEndpointAddress; 177 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 178 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 179 uca->bulkout = ed->bEndpointAddress; 180 } 181 } 182 183 if (uca->bulkin == -1) { 184 aprint_error_dev(self, "Could not find data bulk in\n"); 185 goto bad; 186 } 187 if (uca->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 for (i = 0; i < id->bNumEndpoints; i++) { 222 ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i); 223 if (ed == NULL) 224 continue; 225 226 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 227 (ed->bmAttributes & UE_XFERTYPE) == UE_INTERRUPT) { 228 aprint_error_dev(self, 229 "status change notification available\n"); 230 sc->sc_ctl_notify = ed->bEndpointAddress; 231 } 232 } 233 234 sc->sc_dtr = -1; 235 236 /* bulkin, bulkout set above */ 237 uca->ibufsize = UMODEMIBUFSIZE; 238 uca->obufsize = UMODEMOBUFSIZE; 239 uca->ibufsizepad = UMODEMIBUFSIZE; 240 uca->opkthdrlen = 0; 241 uca->device = sc->sc_udev; 242 uca->iface = sc->sc_data_iface; 243 uca->arg = sc; 244 245 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, 246 USBDEV(sc->sc_dev)); 247 248 DPRINTF(("umodem_common_attach: sc=%p\n", sc)); 249 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, uca, 250 ucomprint, ucomsubmatch); 251 252 return 0; 253 254 bad: 255 sc->sc_dying = 1; 256 return 1; 257 } 258 259 int 260 umodem_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 } 282 283 void 284 umodem_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 USBDEVNAME(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 USBDEVNAME(sc->sc_dev), usbd_errstr(err)); 300 sc->sc_notify_pipe = NULL; 301 } 302 } 303 304 Static void 305 umodem_intr(usbd_xfer_handle xfer, usbd_private_handle 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", USBDEVNAME(sc->sc_dev), 318 usbd_errstr(status)); 319 return; 320 } 321 322 if (sc->sc_notify_buf.bmRequestType != UCDC_NOTIFICATION) { 323 DPRINTF(("%s: unknown message type (%02x) on notify pipe\n", 324 USBDEVNAME(sc->sc_dev), 325 sc->sc_notify_buf.bmRequestType)); 326 return; 327 } 328 329 switch (sc->sc_notify_buf.bNotification) { 330 case UCDC_N_SERIAL_STATE: 331 /* 332 * Set the serial state in ucom driver based on 333 * the bits from the notify message 334 */ 335 if (UGETW(sc->sc_notify_buf.wLength) != 2) { 336 printf("%s: Invalid notification length! (%d)\n", 337 USBDEVNAME(sc->sc_dev), 338 UGETW(sc->sc_notify_buf.wLength)); 339 break; 340 } 341 DPRINTF(("%s: notify bytes = %02x%02x\n", 342 USBDEVNAME(sc->sc_dev), 343 sc->sc_notify_buf.data[0], 344 sc->sc_notify_buf.data[1])); 345 /* Currently, lsr is always zero. */ 346 sc->sc_lsr = sc->sc_msr = 0; 347 mstatus = sc->sc_notify_buf.data[0]; 348 349 if (ISSET(mstatus, UCDC_N_SERIAL_RI)) 350 sc->sc_msr |= UMSR_RI; 351 if (ISSET(mstatus, UCDC_N_SERIAL_DSR)) 352 sc->sc_msr |= UMSR_DSR; 353 if (ISSET(mstatus, UCDC_N_SERIAL_DCD)) 354 sc->sc_msr |= UMSR_DCD; 355 ucom_status_change(device_private(sc->sc_subdev)); 356 break; 357 default: 358 DPRINTF(("%s: unknown notify message: %02x\n", 359 USBDEVNAME(sc->sc_dev), 360 sc->sc_notify_buf.bNotification)); 361 break; 362 } 363 } 364 365 int 366 umodem_get_caps(usbd_device_handle dev, int *cm, int *acm, 367 usb_interface_descriptor_t *id) 368 { 369 const usb_cdc_cm_descriptor_t *cmd; 370 const usb_cdc_acm_descriptor_t *cad; 371 const usb_cdc_union_descriptor_t *cud; 372 373 *cm = *acm = 0; 374 375 cmd = (const usb_cdc_cm_descriptor_t *)usb_find_desc_if(dev, 376 UDESC_CS_INTERFACE, 377 UDESCSUB_CDC_CM, id); 378 if (cmd == NULL) { 379 DPRINTF(("umodem_get_caps: no CM desc\n")); 380 } else { 381 *cm = cmd->bmCapabilities; 382 } 383 384 cad = (const usb_cdc_acm_descriptor_t *)usb_find_desc_if(dev, 385 UDESC_CS_INTERFACE, 386 UDESCSUB_CDC_ACM, 387 id); 388 if (cad == NULL) { 389 DPRINTF(("umodem_get_caps: no ACM desc\n")); 390 } else { 391 *acm = cad->bmCapabilities; 392 } 393 394 cud = (const usb_cdc_union_descriptor_t *)usb_find_desc_if(dev, 395 UDESC_CS_INTERFACE, 396 UDESCSUB_CDC_UNION, 397 id); 398 if (cud == NULL) { 399 DPRINTF(("umodem_get_caps: no UNION desc\n")); 400 } 401 402 return cmd ? cmd->bDataInterface : cud ? cud->bSlaveInterface[0] : -1; 403 } 404 405 void 406 umodem_get_status(void *addr, int portno, u_char *lsr, u_char *msr) 407 { 408 struct umodem_softc *sc = addr; 409 410 DPRINTF(("umodem_get_status:\n")); 411 412 if (lsr != NULL) 413 *lsr = sc->sc_lsr; 414 if (msr != NULL) 415 *msr = sc->sc_msr; 416 } 417 418 int 419 umodem_param(void *addr, int portno, struct termios *t) 420 { 421 struct umodem_softc *sc = addr; 422 usbd_status err; 423 usb_cdc_line_state_t ls; 424 425 DPRINTF(("umodem_param: sc=%p\n", sc)); 426 427 USETDW(ls.dwDTERate, t->c_ospeed); 428 if (ISSET(t->c_cflag, CSTOPB)) 429 ls.bCharFormat = UCDC_STOP_BIT_2; 430 else 431 ls.bCharFormat = UCDC_STOP_BIT_1; 432 if (ISSET(t->c_cflag, PARENB)) { 433 if (ISSET(t->c_cflag, PARODD)) 434 ls.bParityType = UCDC_PARITY_ODD; 435 else 436 ls.bParityType = UCDC_PARITY_EVEN; 437 } else 438 ls.bParityType = UCDC_PARITY_NONE; 439 switch (ISSET(t->c_cflag, CSIZE)) { 440 case CS5: 441 ls.bDataBits = 5; 442 break; 443 case CS6: 444 ls.bDataBits = 6; 445 break; 446 case CS7: 447 ls.bDataBits = 7; 448 break; 449 case CS8: 450 ls.bDataBits = 8; 451 break; 452 } 453 454 err = umodem_set_line_coding(sc, &ls); 455 if (err) { 456 DPRINTF(("umodem_param: err=%s\n", usbd_errstr(err))); 457 return (EPASSTHROUGH); 458 } 459 return (0); 460 } 461 462 int 463 umodem_ioctl(void *addr, int portno, u_long cmd, void *data, 464 int flag, usb_proc_ptr p) 465 { 466 struct umodem_softc *sc = addr; 467 int error = 0; 468 469 if (sc->sc_dying) 470 return (EIO); 471 472 DPRINTF(("umodem_ioctl: cmd=0x%08lx\n", cmd)); 473 474 switch (cmd) { 475 case USB_GET_CM_OVER_DATA: 476 *(int *)data = sc->sc_cm_over_data; 477 break; 478 479 case USB_SET_CM_OVER_DATA: 480 if (*(int *)data != sc->sc_cm_over_data) { 481 /* XXX change it */ 482 } 483 break; 484 485 default: 486 DPRINTF(("umodem_ioctl: unknown\n")); 487 error = EPASSTHROUGH; 488 break; 489 } 490 491 return (error); 492 } 493 494 void 495 umodem_dtr(struct umodem_softc *sc, int onoff) 496 { 497 DPRINTF(("umodem_dtr: onoff=%d\n", onoff)); 498 499 if (sc->sc_dtr == onoff) 500 return; 501 sc->sc_dtr = onoff; 502 503 umodem_set_line_state(sc); 504 } 505 506 void 507 umodem_rts(struct umodem_softc *sc, int onoff) 508 { 509 DPRINTF(("umodem_rts: onoff=%d\n", onoff)); 510 511 if (sc->sc_rts == onoff) 512 return; 513 sc->sc_rts = onoff; 514 515 umodem_set_line_state(sc); 516 } 517 518 void 519 umodem_set_line_state(struct umodem_softc *sc) 520 { 521 usb_device_request_t req; 522 int ls; 523 524 ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) | 525 (sc->sc_rts ? UCDC_LINE_RTS : 0); 526 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 527 req.bRequest = UCDC_SET_CONTROL_LINE_STATE; 528 USETW(req.wValue, ls); 529 USETW(req.wIndex, sc->sc_ctl_iface_no); 530 USETW(req.wLength, 0); 531 532 (void)usbd_do_request(sc->sc_udev, &req, 0); 533 534 } 535 536 void 537 umodem_break(struct umodem_softc *sc, int onoff) 538 { 539 usb_device_request_t req; 540 541 DPRINTF(("umodem_break: onoff=%d\n", onoff)); 542 543 if (!(sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK)) 544 return; 545 546 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 547 req.bRequest = UCDC_SEND_BREAK; 548 USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF); 549 USETW(req.wIndex, sc->sc_ctl_iface_no); 550 USETW(req.wLength, 0); 551 552 (void)usbd_do_request(sc->sc_udev, &req, 0); 553 } 554 555 void 556 umodem_set(void *addr, int portno, int reg, int onoff) 557 { 558 struct umodem_softc *sc = addr; 559 560 switch (reg) { 561 case UCOM_SET_DTR: 562 umodem_dtr(sc, onoff); 563 break; 564 case UCOM_SET_RTS: 565 umodem_rts(sc, onoff); 566 break; 567 case UCOM_SET_BREAK: 568 umodem_break(sc, onoff); 569 break; 570 default: 571 break; 572 } 573 } 574 575 usbd_status 576 umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state) 577 { 578 usb_device_request_t req; 579 usbd_status err; 580 581 DPRINTF(("umodem_set_line_coding: rate=%d fmt=%d parity=%d bits=%d\n", 582 UGETDW(state->dwDTERate), state->bCharFormat, 583 state->bParityType, state->bDataBits)); 584 585 if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) { 586 DPRINTF(("umodem_set_line_coding: already set\n")); 587 return (USBD_NORMAL_COMPLETION); 588 } 589 590 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 591 req.bRequest = UCDC_SET_LINE_CODING; 592 USETW(req.wValue, 0); 593 USETW(req.wIndex, sc->sc_ctl_iface_no); 594 USETW(req.wLength, UCDC_LINE_STATE_LENGTH); 595 596 err = usbd_do_request(sc->sc_udev, &req, state); 597 if (err) { 598 DPRINTF(("umodem_set_line_coding: failed, err=%s\n", 599 usbd_errstr(err))); 600 return (err); 601 } 602 603 sc->sc_line_state = *state; 604 605 return (USBD_NORMAL_COMPLETION); 606 } 607 608 usbd_status 609 umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state) 610 { 611 usb_device_request_t req; 612 usbd_status err; 613 usb_cdc_abstract_state_t ast; 614 615 DPRINTF(("umodem_set_comm_feature: feature=%d state=%d\n", feature, 616 state)); 617 618 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 619 req.bRequest = UCDC_SET_COMM_FEATURE; 620 USETW(req.wValue, feature); 621 USETW(req.wIndex, sc->sc_ctl_iface_no); 622 USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH); 623 USETW(ast.wState, state); 624 625 err = usbd_do_request(sc->sc_udev, &req, &ast); 626 if (err) { 627 DPRINTF(("umodem_set_comm_feature: feature=%d, err=%s\n", 628 feature, usbd_errstr(err))); 629 return (err); 630 } 631 632 return (USBD_NORMAL_COMPLETION); 633 } 634 635 int 636 umodem_common_activate(struct umodem_softc *sc, enum devact act) 637 { 638 switch (act) { 639 case DVACT_DEACTIVATE: 640 sc->sc_dying = 1; 641 return 0; 642 default: 643 return EOPNOTSUPP; 644 } 645 } 646 647 void 648 umodem_common_childdet(struct umodem_softc *sc, device_t child) 649 { 650 KASSERT(sc->sc_subdev == child); 651 sc->sc_subdev = NULL; 652 } 653 654 int 655 umodem_common_detach(struct umodem_softc *sc, int flags) 656 { 657 int rv = 0; 658 659 DPRINTF(("umodem_common_detach: sc=%p flags=%d\n", sc, flags)); 660 661 sc->sc_dying = 1; 662 663 if (sc->sc_subdev != NULL) 664 rv = config_detach(sc->sc_subdev, flags); 665 666 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 667 USBDEV(sc->sc_dev)); 668 669 return (rv); 670 } 671
Indexes created Thu Sep 25 02:09:54 GMT 2025