umodem_common.c revision 1.30
1 /* $NetBSD: umodem_common.c,v 1.30 2019/05/09 02:43:35 mrg 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 1.30 2019/05/09 02:43:35 mrg 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/usbdevs.h> 72 #include <dev/usb/usb_quirks.h> 73 74 #include <dev/usb/ucomvar.h> 75 #include <dev/usb/umodemvar.h> 76 77 #ifdef UMODEM_DEBUG 78 #define DPRINTFN(n, x) if (umodemdebug > (n)) printf x 79 int umodemdebug = 0; 80 #else 81 #define DPRINTFN(n, x) 82 #endif 83 #define DPRINTF(x) DPRINTFN(0, x) 84 85 /* 86 * These are the maximum number of bytes transferred per frame. 87 * If some really high speed devices should use this driver they 88 * may need to be increased, but this is good enough for normal modems. 89 * 90 * Note: increased from 64/256, to better support EVDO wireless PPP. 91 * The sizes should not be increased further, or there 92 * will be problems with contiguous storage allocation. 93 */ 94 #define UMODEMIBUFSIZE 4096 95 #define UMODEMOBUFSIZE 4096 96 97 static usbd_status umodem_set_comm_feature(struct umodem_softc *, 98 int, int); 99 static usbd_status umodem_set_line_coding(struct umodem_softc *, 100 usb_cdc_line_state_t *); 101 102 static void umodem_dtr(struct umodem_softc *, int); 103 static void umodem_rts(struct umodem_softc *, int); 104 static void umodem_break(struct umodem_softc *, int); 105 static void umodem_set_line_state(struct umodem_softc *); 106 static void umodem_intr(struct usbd_xfer *, void *, usbd_status); 107 108 int 109 umodem_common_attach(device_t self, struct umodem_softc *sc, 110 struct usbif_attach_arg *uiaa, struct ucom_attach_args *ucaa) 111 { 112 struct usbd_device *dev = uiaa->uiaa_device; 113 usb_interface_descriptor_t *id; 114 usb_endpoint_descriptor_t *ed; 115 char *devinfop; 116 usbd_status err; 117 int data_ifcno; 118 int i; 119 120 sc->sc_dev = self; 121 sc->sc_udev = dev; 122 sc->sc_ctl_iface = uiaa->uiaa_iface; 123 sc->sc_dying = false; 124 125 aprint_naive("\n"); 126 aprint_normal("\n"); 127 128 id = usbd_get_interface_descriptor(sc->sc_ctl_iface); 129 devinfop = usbd_devinfo_alloc(uiaa->uiaa_device, 0); 130 aprint_normal_dev(self, "%s, iclass %d/%d\n", 131 devinfop, id->bInterfaceClass, id->bInterfaceSubClass); 132 usbd_devinfo_free(devinfop); 133 134 sc->sc_ctl_iface_no = id->bInterfaceNumber; 135 136 /* Get the data interface no. */ 137 sc->sc_data_iface_no = data_ifcno = 138 umodem_get_caps(dev, &sc->sc_cm_cap, &sc->sc_acm_cap, id); 139 140 if (data_ifcno == -1) { 141 aprint_error_dev(self, "no pointer to data interface\n"); 142 goto bad; 143 } 144 145 aprint_normal_dev(self, 146 "data interface %d, has %sCM over data, has %sbreak\n", 147 data_ifcno, sc->sc_cm_cap & USB_CDC_CM_OVER_DATA ? "" : "no ", 148 sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK ? "" : "no "); 149 150 /* Get the data interface too. */ 151 for (i = 0; i < uiaa->uiaa_nifaces; i++) { 152 if (uiaa->uiaa_ifaces[i] != NULL) { 153 id = usbd_get_interface_descriptor(uiaa->uiaa_ifaces[i]); 154 if (id != NULL && id->bInterfaceNumber == data_ifcno) { 155 sc->sc_data_iface = uiaa->uiaa_ifaces[i]; 156 uiaa->uiaa_ifaces[i] = NULL; 157 } 158 } 159 } 160 if (sc->sc_data_iface == NULL) { 161 aprint_error_dev(self, "no data interface\n"); 162 goto bad; 163 } 164 165 /* 166 * Find the bulk endpoints. 167 * Iterate over all endpoints in the data interface and take note. 168 */ 169 ucaa->ucaa_bulkin = ucaa->ucaa_bulkout = -1; 170 171 id = usbd_get_interface_descriptor(sc->sc_data_iface); 172 for (i = 0; i < id->bNumEndpoints; i++) { 173 ed = usbd_interface2endpoint_descriptor(sc->sc_data_iface, i); 174 if (ed == NULL) { 175 aprint_error_dev(self, 176 "no endpoint descriptor for %d\n)", i); 177 goto bad; 178 } 179 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 180 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 181 ucaa->ucaa_bulkin = ed->bEndpointAddress; 182 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 183 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 184 ucaa->ucaa_bulkout = ed->bEndpointAddress; 185 } 186 } 187 188 if (ucaa->ucaa_bulkin == -1) { 189 aprint_error_dev(self, "Could not find data bulk in\n"); 190 goto bad; 191 } 192 if (ucaa->ucaa_bulkout == -1) { 193 aprint_error_dev(self, "Could not find data bulk out\n"); 194 goto bad; 195 } 196 197 if (usbd_get_quirks(sc->sc_udev)->uq_flags & UQ_ASSUME_CM_OVER_DATA) { 198 sc->sc_cm_over_data = 1; 199 } else { 200 if (sc->sc_cm_cap & USB_CDC_CM_OVER_DATA) { 201 if (sc->sc_acm_cap & USB_CDC_ACM_HAS_FEATURE) 202 err = umodem_set_comm_feature(sc, 203 UCDC_ABSTRACT_STATE, UCDC_DATA_MULTIPLEXED); 204 else 205 err = 0; 206 if (err) { 207 aprint_error_dev(self, 208 "could not set data multiplex mode\n"); 209 goto bad; 210 } 211 sc->sc_cm_over_data = 1; 212 } 213 } 214 215 /* 216 * The standard allows for notification messages (to indicate things 217 * like a modem hangup) to come in via an interrupt endpoint 218 * off of the control interface. Iterate over the endpoints on 219 * the control interface and see if there are any interrupt 220 * endpoints; if there are, then register it. 221 */ 222 223 sc->sc_ctl_notify = -1; 224 sc->sc_notify_pipe = NULL; 225 226 id = usbd_get_interface_descriptor(sc->sc_ctl_iface); 227 for (i = 0; i < id->bNumEndpoints; i++) { 228 ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i); 229 if (ed == NULL) 230 continue; 231 232 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 233 (ed->bmAttributes & UE_XFERTYPE) == UE_INTERRUPT) { 234 aprint_verbose_dev(self, 235 "status change notification available\n"); 236 sc->sc_ctl_notify = ed->bEndpointAddress; 237 } 238 } 239 240 sc->sc_dtr = -1; 241 242 /* ucaa_bulkin, ucaa_bulkout set above */ 243 ucaa->ucaa_ibufsize = UMODEMIBUFSIZE; 244 ucaa->ucaa_obufsize = UMODEMOBUFSIZE; 245 ucaa->ucaa_ibufsizepad = UMODEMIBUFSIZE; 246 ucaa->ucaa_opkthdrlen = 0; 247 ucaa->ucaa_device = sc->sc_udev; 248 ucaa->ucaa_iface = sc->sc_data_iface; 249 ucaa->ucaa_arg = sc; 250 251 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 252 253 DPRINTF(("umodem_common_attach: sc=%p\n", sc)); 254 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, ucaa, 255 ucomprint, ucomsubmatch); 256 257 return 0; 258 259 bad: 260 sc->sc_dying = true; 261 return 1; 262 } 263 264 int 265 umodem_open(void *addr, int portno) 266 { 267 struct umodem_softc *sc = addr; 268 int err; 269 270 if (sc->sc_dying) 271 return EIO; 272 273 DPRINTF(("umodem_open: sc=%p\n", sc)); 274 275 if (sc->sc_ctl_notify != -1 && sc->sc_notify_pipe == NULL) { 276 err = usbd_open_pipe_intr(sc->sc_ctl_iface, sc->sc_ctl_notify, 277 USBD_SHORT_XFER_OK, &sc->sc_notify_pipe, sc, 278 &sc->sc_notify_buf, sizeof(sc->sc_notify_buf), 279 umodem_intr, USBD_DEFAULT_INTERVAL); 280 281 if (err) { 282 DPRINTF(("Failed to establish notify pipe: %s\n", 283 usbd_errstr(err))); 284 return EIO; 285 } 286 } 287 288 return 0; 289 } 290 291 static void 292 umodem_close_pipe(struct umodem_softc *sc) 293 { 294 295 if (sc->sc_notify_pipe != NULL) { 296 usbd_abort_pipe(sc->sc_notify_pipe); 297 usbd_close_pipe(sc->sc_notify_pipe); 298 sc->sc_notify_pipe = NULL; 299 } 300 } 301 302 void 303 umodem_close(void *addr, int portno) 304 { 305 struct umodem_softc *sc = addr; 306 307 DPRINTF(("umodem_close: sc=%p\n", sc)); 308 309 if (sc->sc_dying) 310 return; 311 312 umodem_close_pipe(sc); 313 } 314 315 static void 316 umodem_intr(struct usbd_xfer *xfer, void *priv, 317 usbd_status status) 318 { 319 struct umodem_softc *sc = priv; 320 u_char mstatus; 321 322 if (sc->sc_dying) 323 return; 324 325 if (status != USBD_NORMAL_COMPLETION) { 326 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 327 return; 328 printf("%s: abnormal status: %s\n", device_xname(sc->sc_dev), 329 usbd_errstr(status)); 330 if (status == USBD_STALLED) 331 usbd_clear_endpoint_stall_async(sc->sc_notify_pipe); 332 return; 333 } 334 335 if (sc->sc_notify_buf.bmRequestType != UCDC_NOTIFICATION) { 336 DPRINTF(("%s: unknown message type (%02x) on notify pipe\n", 337 device_xname(sc->sc_dev), 338 sc->sc_notify_buf.bmRequestType)); 339 return; 340 } 341 342 switch (sc->sc_notify_buf.bNotification) { 343 case UCDC_N_SERIAL_STATE: 344 /* 345 * Set the serial state in ucom driver based on 346 * the bits from the notify message 347 */ 348 if (UGETW(sc->sc_notify_buf.wLength) != 2) { 349 printf("%s: Invalid notification length! (%d)\n", 350 device_xname(sc->sc_dev), 351 UGETW(sc->sc_notify_buf.wLength)); 352 break; 353 } 354 DPRINTF(("%s: notify bytes = %02x%02x\n", 355 device_xname(sc->sc_dev), 356 sc->sc_notify_buf.data[0], 357 sc->sc_notify_buf.data[1])); 358 /* Currently, lsr is always zero. */ 359 sc->sc_lsr = sc->sc_msr = 0; 360 mstatus = sc->sc_notify_buf.data[0]; 361 362 if (ISSET(mstatus, UCDC_N_SERIAL_RI)) 363 sc->sc_msr |= UMSR_RI; 364 if (ISSET(mstatus, UCDC_N_SERIAL_DSR)) 365 sc->sc_msr |= UMSR_DSR; 366 if (ISSET(mstatus, UCDC_N_SERIAL_DCD)) 367 sc->sc_msr |= UMSR_DCD; 368 ucom_status_change(device_private(sc->sc_subdev)); 369 break; 370 default: 371 DPRINTF(("%s: unknown notify message: %02x\n", 372 device_xname(sc->sc_dev), 373 sc->sc_notify_buf.bNotification)); 374 break; 375 } 376 } 377 378 int 379 umodem_get_caps(struct usbd_device *dev, int *cm, int *acm, 380 usb_interface_descriptor_t *id) 381 { 382 const usb_cdc_cm_descriptor_t *cmd; 383 const usb_cdc_acm_descriptor_t *cad; 384 const usb_cdc_union_descriptor_t *cud; 385 uint32_t uq_flags; 386 387 *cm = *acm = 0; 388 uq_flags = usbd_get_quirks(dev)->uq_flags; 389 390 if (uq_flags & UQ_NO_UNION_NRM) { 391 DPRINTF(("umodem_get_caps: NO_UNION_NRM quirk - returning 0\n")); 392 return 0; 393 } 394 395 if (uq_flags & UQ_LOST_CS_DESC) 396 id = NULL; 397 398 cmd = (const usb_cdc_cm_descriptor_t *)usb_find_desc_if(dev, 399 UDESC_CS_INTERFACE, 400 UDESCSUB_CDC_CM, id); 401 if (cmd == NULL) { 402 DPRINTF(("umodem_get_caps: no CM desc\n")); 403 } else { 404 *cm = cmd->bmCapabilities; 405 } 406 407 cad = (const usb_cdc_acm_descriptor_t *)usb_find_desc_if(dev, 408 UDESC_CS_INTERFACE, 409 UDESCSUB_CDC_ACM, 410 id); 411 if (cad == NULL) { 412 DPRINTF(("umodem_get_caps: no ACM desc\n")); 413 } else { 414 *acm = cad->bmCapabilities; 415 } 416 417 cud = (const usb_cdc_union_descriptor_t *)usb_find_desc_if(dev, 418 UDESC_CS_INTERFACE, 419 UDESCSUB_CDC_UNION, 420 id); 421 if (cud == NULL) { 422 DPRINTF(("umodem_get_caps: no UNION desc\n")); 423 } 424 425 return cmd ? cmd->bDataInterface : cud ? cud->bSlaveInterface[0] : -1; 426 } 427 428 void 429 umodem_get_status(void *addr, int portno, u_char *lsr, u_char *msr) 430 { 431 struct umodem_softc *sc = addr; 432 433 DPRINTF(("umodem_get_status:\n")); 434 435 *lsr = sc->sc_lsr; 436 *msr = sc->sc_msr; 437 } 438 439 int 440 umodem_param(void *addr, int portno, struct termios *t) 441 { 442 struct umodem_softc *sc = addr; 443 usbd_status err; 444 usb_cdc_line_state_t ls; 445 446 DPRINTF(("umodem_param: sc=%p\n", sc)); 447 448 if (sc->sc_dying) 449 return EIO; 450 451 USETDW(ls.dwDTERate, t->c_ospeed); 452 if (ISSET(t->c_cflag, CSTOPB)) 453 ls.bCharFormat = UCDC_STOP_BIT_2; 454 else 455 ls.bCharFormat = UCDC_STOP_BIT_1; 456 if (ISSET(t->c_cflag, PARENB)) { 457 if (ISSET(t->c_cflag, PARODD)) 458 ls.bParityType = UCDC_PARITY_ODD; 459 else 460 ls.bParityType = UCDC_PARITY_EVEN; 461 } else 462 ls.bParityType = UCDC_PARITY_NONE; 463 switch (ISSET(t->c_cflag, CSIZE)) { 464 case CS5: 465 ls.bDataBits = 5; 466 break; 467 case CS6: 468 ls.bDataBits = 6; 469 break; 470 case CS7: 471 ls.bDataBits = 7; 472 break; 473 case CS8: 474 ls.bDataBits = 8; 475 break; 476 } 477 478 err = umodem_set_line_coding(sc, &ls); 479 if (err) { 480 DPRINTF(("umodem_param: err=%s\n", usbd_errstr(err))); 481 return EPASSTHROUGH; 482 } 483 return 0; 484 } 485 486 int 487 umodem_ioctl(void *addr, int portno, u_long cmd, void *data, 488 int flag, proc_t *p) 489 { 490 struct umodem_softc *sc = addr; 491 int error = 0; 492 493 DPRINTF(("umodem_ioctl: cmd=0x%08lx\n", cmd)); 494 495 if (sc->sc_dying) 496 return EIO; 497 498 switch (cmd) { 499 case USB_GET_CM_OVER_DATA: 500 *(int *)data = sc->sc_cm_over_data; 501 break; 502 503 case USB_SET_CM_OVER_DATA: 504 if (*(int *)data != sc->sc_cm_over_data) { 505 /* XXX change it */ 506 } 507 break; 508 509 default: 510 DPRINTF(("umodem_ioctl: unknown\n")); 511 error = EPASSTHROUGH; 512 break; 513 } 514 515 return error; 516 } 517 518 static void 519 umodem_dtr(struct umodem_softc *sc, int onoff) 520 { 521 DPRINTF(("umodem_dtr: onoff=%d\n", onoff)); 522 523 if (sc->sc_dtr == onoff) 524 return; 525 sc->sc_dtr = onoff; 526 527 umodem_set_line_state(sc); 528 } 529 530 static void 531 umodem_rts(struct umodem_softc *sc, int onoff) 532 { 533 DPRINTF(("umodem_rts: onoff=%d\n", onoff)); 534 535 if (sc->sc_rts == onoff) 536 return; 537 sc->sc_rts = onoff; 538 539 umodem_set_line_state(sc); 540 } 541 542 static void 543 umodem_set_line_state(struct umodem_softc *sc) 544 { 545 usb_device_request_t req; 546 int ls; 547 548 ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) | 549 (sc->sc_rts ? UCDC_LINE_RTS : 0); 550 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 551 req.bRequest = UCDC_SET_CONTROL_LINE_STATE; 552 USETW(req.wValue, ls); 553 USETW(req.wIndex, sc->sc_ctl_iface_no); 554 USETW(req.wLength, 0); 555 556 (void)usbd_do_request(sc->sc_udev, &req, 0); 557 558 } 559 560 static void 561 umodem_break(struct umodem_softc *sc, int onoff) 562 { 563 usb_device_request_t req; 564 565 DPRINTF(("umodem_break: onoff=%d\n", onoff)); 566 567 if (!(sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK)) 568 return; 569 570 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 571 req.bRequest = UCDC_SEND_BREAK; 572 USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF); 573 USETW(req.wIndex, sc->sc_ctl_iface_no); 574 USETW(req.wLength, 0); 575 576 (void)usbd_do_request(sc->sc_udev, &req, 0); 577 } 578 579 void 580 umodem_set(void *addr, int portno, int reg, int onoff) 581 { 582 struct umodem_softc *sc = addr; 583 584 if (sc->sc_dying) 585 return; 586 587 switch (reg) { 588 case UCOM_SET_DTR: 589 umodem_dtr(sc, onoff); 590 break; 591 case UCOM_SET_RTS: 592 umodem_rts(sc, onoff); 593 break; 594 case UCOM_SET_BREAK: 595 umodem_break(sc, onoff); 596 break; 597 default: 598 break; 599 } 600 } 601 602 static usbd_status 603 umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state) 604 { 605 usb_device_request_t req; 606 usbd_status err; 607 608 DPRINTF(("umodem_set_line_coding: rate=%d fmt=%d parity=%d bits=%d\n", 609 UGETDW(state->dwDTERate), state->bCharFormat, 610 state->bParityType, state->bDataBits)); 611 612 if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) { 613 DPRINTF(("umodem_set_line_coding: already set\n")); 614 return USBD_NORMAL_COMPLETION; 615 } 616 617 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 618 req.bRequest = UCDC_SET_LINE_CODING; 619 USETW(req.wValue, 0); 620 USETW(req.wIndex, sc->sc_ctl_iface_no); 621 USETW(req.wLength, UCDC_LINE_STATE_LENGTH); 622 623 err = usbd_do_request(sc->sc_udev, &req, state); 624 if (err) { 625 DPRINTF(("umodem_set_line_coding: failed, err=%s\n", 626 usbd_errstr(err))); 627 return err; 628 } 629 630 sc->sc_line_state = *state; 631 632 return USBD_NORMAL_COMPLETION; 633 } 634 635 static usbd_status 636 umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state) 637 { 638 usb_device_request_t req; 639 usbd_status err; 640 usb_cdc_abstract_state_t ast; 641 642 DPRINTF(("umodem_set_comm_feature: feature=%d state=%d\n", feature, 643 state)); 644 645 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 646 req.bRequest = UCDC_SET_COMM_FEATURE; 647 USETW(req.wValue, feature); 648 USETW(req.wIndex, sc->sc_ctl_iface_no); 649 USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH); 650 USETW(ast.wState, state); 651 652 err = usbd_do_request(sc->sc_udev, &req, &ast); 653 if (err) { 654 DPRINTF(("umodem_set_comm_feature: feature=%d, err=%s\n", 655 feature, usbd_errstr(err))); 656 return err; 657 } 658 659 return USBD_NORMAL_COMPLETION; 660 } 661 662 void 663 umodem_common_childdet(struct umodem_softc *sc, device_t child) 664 { 665 KASSERT(sc->sc_subdev == child); 666 sc->sc_subdev = NULL; 667 } 668 669 int 670 umodem_common_detach(struct umodem_softc *sc, int flags) 671 { 672 int rv = 0; 673 674 DPRINTF(("umodem_common_detach: sc=%p flags=%d\n", sc, flags)); 675 676 sc->sc_dying = true; 677 678 umodem_close_pipe(sc); 679 680 if (sc->sc_subdev != NULL) { 681 rv = config_detach(sc->sc_subdev, flags); 682 sc->sc_subdev = NULL; 683 } 684 685 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 686 687 return rv; 688 } 689
Indexes created Thu Sep 25 08:09:54 GMT 2025