umodem_common.c revision 1.15
1 /* $NetBSD: umodem_common.c,v 1.15 2008/05/24 16:40:58 cube 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 1.15 2008/05/24 16:40:58 cube 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 devinfop = usbd_devinfo_alloc(uaa->device, 0); 117 USB_ATTACH_SETUP; 118 119 sc->sc_dev = self; 120 sc->sc_udev = dev; 121 sc->sc_ctl_iface = uaa->iface; 122 123 id = usbd_get_interface_descriptor(sc->sc_ctl_iface); 124 aprint_normal_dev(self, "%s, iclass %d/%d\n", 125 devinfop, id->bInterfaceClass, id->bInterfaceSubClass); 126 usbd_devinfo_free(devinfop); 127 sc->sc_ctl_iface_no = id->bInterfaceNumber; 128 129 /* Get the data interface no. */ 130 sc->sc_data_iface_no = data_ifcno = 131 umodem_get_caps(dev, &sc->sc_cm_cap, &sc->sc_acm_cap, id); 132 133 if (data_ifcno == -1) { 134 aprint_error_dev(self, "no pointer to data interface\n"); 135 goto bad; 136 } 137 138 aprint_normal_dev(self, 139 "data interface %d, has %sCM over data, has %sbreak\n", 140 data_ifcno, sc->sc_cm_cap & USB_CDC_CM_OVER_DATA ? "" : "no ", 141 sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK ? "" : "no "); 142 143 /* Get the data interface too. */ 144 for (i = 0; i < uaa->nifaces; i++) { 145 if (uaa->ifaces[i] != NULL) { 146 id = usbd_get_interface_descriptor(uaa->ifaces[i]); 147 if (id != NULL && id->bInterfaceNumber == data_ifcno) { 148 sc->sc_data_iface = uaa->ifaces[i]; 149 uaa->ifaces[i] = NULL; 150 } 151 } 152 } 153 if (sc->sc_data_iface == NULL) { 154 aprint_error_dev(self, "no data interface\n"); 155 goto bad; 156 } 157 158 /* 159 * Find the bulk endpoints. 160 * Iterate over all endpoints in the data interface and take note. 161 */ 162 uca->bulkin = uca->bulkout = -1; 163 164 id = usbd_get_interface_descriptor(sc->sc_data_iface); 165 for (i = 0; i < id->bNumEndpoints; i++) { 166 ed = usbd_interface2endpoint_descriptor(sc->sc_data_iface, i); 167 if (ed == NULL) { 168 aprint_error_dev(self, 169 "no endpoint descriptor for %d\n)", i); 170 goto bad; 171 } 172 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 173 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 174 uca->bulkin = ed->bEndpointAddress; 175 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 176 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 177 uca->bulkout = ed->bEndpointAddress; 178 } 179 } 180 181 if (uca->bulkin == -1) { 182 aprint_error_dev(self, "Could not find data bulk in\n"); 183 goto bad; 184 } 185 if (uca->bulkout == -1) { 186 aprint_error_dev(self, "Could not find data bulk out\n"); 187 goto bad; 188 } 189 190 if (usbd_get_quirks(sc->sc_udev)->uq_flags & UQ_ASSUME_CM_OVER_DATA) { 191 sc->sc_cm_over_data = 1; 192 } else { 193 if (sc->sc_cm_cap & USB_CDC_CM_OVER_DATA) { 194 if (sc->sc_acm_cap & USB_CDC_ACM_HAS_FEATURE) 195 err = umodem_set_comm_feature(sc, 196 UCDC_ABSTRACT_STATE, UCDC_DATA_MULTIPLEXED); 197 else 198 err = 0; 199 if (err) { 200 aprint_error_dev(self, 201 "could not set data multiplex mode\n"); 202 goto bad; 203 } 204 sc->sc_cm_over_data = 1; 205 } 206 } 207 208 /* 209 * The standard allows for notification messages (to indicate things 210 * like a modem hangup) to come in via an interrupt endpoint 211 * off of the control interface. Iterate over the endpoints on 212 * the control interface and see if there are any interrupt 213 * endpoints; if there are, then register it. 214 */ 215 216 sc->sc_ctl_notify = -1; 217 sc->sc_notify_pipe = NULL; 218 219 for (i = 0; i < id->bNumEndpoints; i++) { 220 ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i); 221 if (ed == NULL) 222 continue; 223 224 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 225 (ed->bmAttributes & UE_XFERTYPE) == UE_INTERRUPT) { 226 aprint_error_dev(self, 227 "status change notification available\n"); 228 sc->sc_ctl_notify = ed->bEndpointAddress; 229 } 230 } 231 232 sc->sc_dtr = -1; 233 234 /* bulkin, bulkout set above */ 235 uca->ibufsize = UMODEMIBUFSIZE; 236 uca->obufsize = UMODEMOBUFSIZE; 237 uca->ibufsizepad = UMODEMIBUFSIZE; 238 uca->opkthdrlen = 0; 239 uca->device = sc->sc_udev; 240 uca->iface = sc->sc_data_iface; 241 uca->arg = sc; 242 243 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, 244 USBDEV(sc->sc_dev)); 245 246 DPRINTF(("umodem_common_attach: sc=%p\n", sc)); 247 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, uca, 248 ucomprint, ucomsubmatch); 249 250 return 0; 251 252 bad: 253 sc->sc_dying = 1; 254 return 1; 255 } 256 257 int 258 umodem_open(void *addr, int portno) 259 { 260 struct umodem_softc *sc = addr; 261 int err; 262 263 DPRINTF(("umodem_open: sc=%p\n", sc)); 264 265 if (sc->sc_ctl_notify != -1 && sc->sc_notify_pipe == NULL) { 266 err = usbd_open_pipe_intr(sc->sc_ctl_iface, sc->sc_ctl_notify, 267 USBD_SHORT_XFER_OK, &sc->sc_notify_pipe, sc, 268 &sc->sc_notify_buf, sizeof(sc->sc_notify_buf), 269 umodem_intr, USBD_DEFAULT_INTERVAL); 270 271 if (err) { 272 DPRINTF(("Failed to establish notify pipe: %s\n", 273 usbd_errstr(err))); 274 return EIO; 275 } 276 } 277 278 return 0; 279 } 280 281 void 282 umodem_close(void *addr, int portno) 283 { 284 struct umodem_softc *sc = addr; 285 int err; 286 287 DPRINTF(("umodem_close: sc=%p\n", sc)); 288 289 if (sc->sc_notify_pipe != NULL) { 290 err = usbd_abort_pipe(sc->sc_notify_pipe); 291 if (err) 292 printf("%s: abort notify pipe failed: %s\n", 293 USBDEVNAME(sc->sc_dev), usbd_errstr(err)); 294 err = usbd_close_pipe(sc->sc_notify_pipe); 295 if (err) 296 printf("%s: close notify pipe failed: %s\n", 297 USBDEVNAME(sc->sc_dev), usbd_errstr(err)); 298 sc->sc_notify_pipe = NULL; 299 } 300 } 301 302 Static void 303 umodem_intr(usbd_xfer_handle xfer, usbd_private_handle priv, 304 usbd_status status) 305 { 306 struct umodem_softc *sc = priv; 307 u_char mstatus; 308 309 if (sc->sc_dying) 310 return; 311 312 if (status != USBD_NORMAL_COMPLETION) { 313 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 314 return; 315 printf("%s: abnormal status: %s\n", USBDEVNAME(sc->sc_dev), 316 usbd_errstr(status)); 317 return; 318 } 319 320 if (sc->sc_notify_buf.bmRequestType != UCDC_NOTIFICATION) { 321 DPRINTF(("%s: unknown message type (%02x) on notify pipe\n", 322 USBDEVNAME(sc->sc_dev), 323 sc->sc_notify_buf.bmRequestType)); 324 return; 325 } 326 327 switch (sc->sc_notify_buf.bNotification) { 328 case UCDC_N_SERIAL_STATE: 329 /* 330 * Set the serial state in ucom driver based on 331 * the bits from the notify message 332 */ 333 if (UGETW(sc->sc_notify_buf.wLength) != 2) { 334 printf("%s: Invalid notification length! (%d)\n", 335 USBDEVNAME(sc->sc_dev), 336 UGETW(sc->sc_notify_buf.wLength)); 337 break; 338 } 339 DPRINTF(("%s: notify bytes = %02x%02x\n", 340 USBDEVNAME(sc->sc_dev), 341 sc->sc_notify_buf.data[0], 342 sc->sc_notify_buf.data[1])); 343 /* Currently, lsr is always zero. */ 344 sc->sc_lsr = sc->sc_msr = 0; 345 mstatus = sc->sc_notify_buf.data[0]; 346 347 if (ISSET(mstatus, UCDC_N_SERIAL_RI)) 348 sc->sc_msr |= UMSR_RI; 349 if (ISSET(mstatus, UCDC_N_SERIAL_DSR)) 350 sc->sc_msr |= UMSR_DSR; 351 if (ISSET(mstatus, UCDC_N_SERIAL_DCD)) 352 sc->sc_msr |= UMSR_DCD; 353 ucom_status_change(device_private(sc->sc_subdev)); 354 break; 355 default: 356 DPRINTF(("%s: unknown notify message: %02x\n", 357 USBDEVNAME(sc->sc_dev), 358 sc->sc_notify_buf.bNotification)); 359 break; 360 } 361 } 362 363 int 364 umodem_get_caps(usbd_device_handle dev, int *cm, int *acm, 365 usb_interface_descriptor_t *id) 366 { 367 const usb_cdc_cm_descriptor_t *cmd; 368 const usb_cdc_acm_descriptor_t *cad; 369 const usb_cdc_union_descriptor_t *cud; 370 371 *cm = *acm = 0; 372 373 cmd = (const usb_cdc_cm_descriptor_t *)usb_find_desc_if(dev, 374 UDESC_CS_INTERFACE, 375 UDESCSUB_CDC_CM, id); 376 if (cmd == NULL) { 377 DPRINTF(("umodem_get_caps: no CM desc\n")); 378 } else { 379 *cm = cmd->bmCapabilities; 380 } 381 382 cad = (const usb_cdc_acm_descriptor_t *)usb_find_desc_if(dev, 383 UDESC_CS_INTERFACE, 384 UDESCSUB_CDC_ACM, 385 id); 386 if (cad == NULL) { 387 DPRINTF(("umodem_get_caps: no ACM desc\n")); 388 } else { 389 *acm = cad->bmCapabilities; 390 } 391 392 cud = (const usb_cdc_union_descriptor_t *)usb_find_desc_if(dev, 393 UDESC_CS_INTERFACE, 394 UDESCSUB_CDC_UNION, 395 id); 396 if (cud == NULL) { 397 DPRINTF(("umodem_get_caps: no UNION desc\n")); 398 } 399 400 return cmd ? cmd->bDataInterface : cud ? cud->bSlaveInterface[0] : -1; 401 } 402 403 void 404 umodem_get_status(void *addr, int portno, u_char *lsr, u_char *msr) 405 { 406 struct umodem_softc *sc = addr; 407 408 DPRINTF(("umodem_get_status:\n")); 409 410 if (lsr != NULL) 411 *lsr = sc->sc_lsr; 412 if (msr != NULL) 413 *msr = sc->sc_msr; 414 } 415 416 int 417 umodem_param(void *addr, int portno, struct termios *t) 418 { 419 struct umodem_softc *sc = addr; 420 usbd_status err; 421 usb_cdc_line_state_t ls; 422 423 DPRINTF(("umodem_param: sc=%p\n", sc)); 424 425 USETDW(ls.dwDTERate, t->c_ospeed); 426 if (ISSET(t->c_cflag, CSTOPB)) 427 ls.bCharFormat = UCDC_STOP_BIT_2; 428 else 429 ls.bCharFormat = UCDC_STOP_BIT_1; 430 if (ISSET(t->c_cflag, PARENB)) { 431 if (ISSET(t->c_cflag, PARODD)) 432 ls.bParityType = UCDC_PARITY_ODD; 433 else 434 ls.bParityType = UCDC_PARITY_EVEN; 435 } else 436 ls.bParityType = UCDC_PARITY_NONE; 437 switch (ISSET(t->c_cflag, CSIZE)) { 438 case CS5: 439 ls.bDataBits = 5; 440 break; 441 case CS6: 442 ls.bDataBits = 6; 443 break; 444 case CS7: 445 ls.bDataBits = 7; 446 break; 447 case CS8: 448 ls.bDataBits = 8; 449 break; 450 } 451 452 err = umodem_set_line_coding(sc, &ls); 453 if (err) { 454 DPRINTF(("umodem_param: err=%s\n", usbd_errstr(err))); 455 return (EPASSTHROUGH); 456 } 457 return (0); 458 } 459 460 int 461 umodem_ioctl(void *addr, int portno, u_long cmd, void *data, 462 int flag, usb_proc_ptr p) 463 { 464 struct umodem_softc *sc = addr; 465 int error = 0; 466 467 if (sc->sc_dying) 468 return (EIO); 469 470 DPRINTF(("umodem_ioctl: cmd=0x%08lx\n", cmd)); 471 472 switch (cmd) { 473 case USB_GET_CM_OVER_DATA: 474 *(int *)data = sc->sc_cm_over_data; 475 break; 476 477 case USB_SET_CM_OVER_DATA: 478 if (*(int *)data != sc->sc_cm_over_data) { 479 /* XXX change it */ 480 } 481 break; 482 483 default: 484 DPRINTF(("umodem_ioctl: unknown\n")); 485 error = EPASSTHROUGH; 486 break; 487 } 488 489 return (error); 490 } 491 492 void 493 umodem_dtr(struct umodem_softc *sc, int onoff) 494 { 495 DPRINTF(("umodem_dtr: onoff=%d\n", onoff)); 496 497 if (sc->sc_dtr == onoff) 498 return; 499 sc->sc_dtr = onoff; 500 501 umodem_set_line_state(sc); 502 } 503 504 void 505 umodem_rts(struct umodem_softc *sc, int onoff) 506 { 507 DPRINTF(("umodem_rts: onoff=%d\n", onoff)); 508 509 if (sc->sc_rts == onoff) 510 return; 511 sc->sc_rts = onoff; 512 513 umodem_set_line_state(sc); 514 } 515 516 void 517 umodem_set_line_state(struct umodem_softc *sc) 518 { 519 usb_device_request_t req; 520 int ls; 521 522 ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) | 523 (sc->sc_rts ? UCDC_LINE_RTS : 0); 524 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 525 req.bRequest = UCDC_SET_CONTROL_LINE_STATE; 526 USETW(req.wValue, ls); 527 USETW(req.wIndex, sc->sc_ctl_iface_no); 528 USETW(req.wLength, 0); 529 530 (void)usbd_do_request(sc->sc_udev, &req, 0); 531 532 } 533 534 void 535 umodem_break(struct umodem_softc *sc, int onoff) 536 { 537 usb_device_request_t req; 538 539 DPRINTF(("umodem_break: onoff=%d\n", onoff)); 540 541 if (!(sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK)) 542 return; 543 544 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 545 req.bRequest = UCDC_SEND_BREAK; 546 USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF); 547 USETW(req.wIndex, sc->sc_ctl_iface_no); 548 USETW(req.wLength, 0); 549 550 (void)usbd_do_request(sc->sc_udev, &req, 0); 551 } 552 553 void 554 umodem_set(void *addr, int portno, int reg, int onoff) 555 { 556 struct umodem_softc *sc = addr; 557 558 switch (reg) { 559 case UCOM_SET_DTR: 560 umodem_dtr(sc, onoff); 561 break; 562 case UCOM_SET_RTS: 563 umodem_rts(sc, onoff); 564 break; 565 case UCOM_SET_BREAK: 566 umodem_break(sc, onoff); 567 break; 568 default: 569 break; 570 } 571 } 572 573 usbd_status 574 umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state) 575 { 576 usb_device_request_t req; 577 usbd_status err; 578 579 DPRINTF(("umodem_set_line_coding: rate=%d fmt=%d parity=%d bits=%d\n", 580 UGETDW(state->dwDTERate), state->bCharFormat, 581 state->bParityType, state->bDataBits)); 582 583 if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) { 584 DPRINTF(("umodem_set_line_coding: already set\n")); 585 return (USBD_NORMAL_COMPLETION); 586 } 587 588 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 589 req.bRequest = UCDC_SET_LINE_CODING; 590 USETW(req.wValue, 0); 591 USETW(req.wIndex, sc->sc_ctl_iface_no); 592 USETW(req.wLength, UCDC_LINE_STATE_LENGTH); 593 594 err = usbd_do_request(sc->sc_udev, &req, state); 595 if (err) { 596 DPRINTF(("umodem_set_line_coding: failed, err=%s\n", 597 usbd_errstr(err))); 598 return (err); 599 } 600 601 sc->sc_line_state = *state; 602 603 return (USBD_NORMAL_COMPLETION); 604 } 605 606 usbd_status 607 umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state) 608 { 609 usb_device_request_t req; 610 usbd_status err; 611 usb_cdc_abstract_state_t ast; 612 613 DPRINTF(("umodem_set_comm_feature: feature=%d state=%d\n", feature, 614 state)); 615 616 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 617 req.bRequest = UCDC_SET_COMM_FEATURE; 618 USETW(req.wValue, feature); 619 USETW(req.wIndex, sc->sc_ctl_iface_no); 620 USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH); 621 USETW(ast.wState, state); 622 623 err = usbd_do_request(sc->sc_udev, &req, &ast); 624 if (err) { 625 DPRINTF(("umodem_set_comm_feature: feature=%d, err=%s\n", 626 feature, usbd_errstr(err))); 627 return (err); 628 } 629 630 return (USBD_NORMAL_COMPLETION); 631 } 632 633 int 634 umodem_common_activate(struct umodem_softc *sc, enum devact act) 635 { 636 int rv = 0; 637 638 switch (act) { 639 case DVACT_ACTIVATE: 640 return (EOPNOTSUPP); 641 642 case DVACT_DEACTIVATE: 643 sc->sc_dying = 1; 644 if (sc->sc_subdev) 645 rv = config_deactivate(sc->sc_subdev); 646 break; 647 } 648 return (rv); 649 } 650 651 void 652 umodem_common_childdet(struct umodem_softc *sc, device_t child) 653 { 654 KASSERT(sc->sc_subdev == child); 655 sc->sc_subdev = NULL; 656 } 657 658 int 659 umodem_common_detach(struct umodem_softc *sc, int flags) 660 { 661 int rv = 0; 662 663 DPRINTF(("umodem_common_detach: sc=%p flags=%d\n", sc, flags)); 664 665 sc->sc_dying = 1; 666 667 if (sc->sc_subdev != NULL) 668 rv = config_detach(sc->sc_subdev, flags); 669 670 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 671 USBDEV(sc->sc_dev)); 672 673 return (rv); 674 } 675
Indexes created Wed Sep 24 05:09:52 GMT 2025