umodem_common.c revision 1.34
1 /* $NetBSD: umodem_common.c,v 1.34 2021/04/24 23:36:59 thorpej 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 1.34 2021/04/24 23:36:59 thorpej 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 /* 109 * NOTE: Callers of umodem_common_attach() should initialise their ucaa 110 * to 0 before assigning any fields. ucaa_ibufsize, ucaa_ibufsize and 111 * ucaa_obufsize may be set by the caller, but if 0 are set to default 112 * umodem values. 113 */ 114 int 115 umodem_common_attach(device_t self, struct umodem_softc *sc, 116 struct usbif_attach_arg *uiaa, struct ucom_attach_args *ucaa) 117 { 118 struct usbd_device *dev = uiaa->uiaa_device; 119 usb_interface_descriptor_t *id; 120 usb_endpoint_descriptor_t *ed; 121 char *devinfop; 122 usbd_status err; 123 int data_ifcno; 124 int i; 125 126 sc->sc_dev = self; 127 sc->sc_udev = dev; 128 sc->sc_ctl_iface = uiaa->uiaa_iface; 129 sc->sc_dying = false; 130 131 aprint_naive("\n"); 132 aprint_normal("\n"); 133 134 id = usbd_get_interface_descriptor(sc->sc_ctl_iface); 135 devinfop = usbd_devinfo_alloc(uiaa->uiaa_device, 0); 136 aprint_normal_dev(self, "%s, iclass %d/%d\n", 137 devinfop, id->bInterfaceClass, id->bInterfaceSubClass); 138 usbd_devinfo_free(devinfop); 139 140 sc->sc_ctl_iface_no = id->bInterfaceNumber; 141 142 /* Get the data interface no. */ 143 sc->sc_data_iface_no = data_ifcno = 144 umodem_get_caps(dev, &sc->sc_cm_cap, &sc->sc_acm_cap, id); 145 146 if (data_ifcno == -1) { 147 aprint_error_dev(self, "no pointer to data interface\n"); 148 goto bad; 149 } 150 151 aprint_normal_dev(self, 152 "data interface %d, has %sCM over data, has %sbreak\n", 153 data_ifcno, sc->sc_cm_cap & USB_CDC_CM_OVER_DATA ? "" : "no ", 154 sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK ? "" : "no "); 155 156 /* Get the data interface too. */ 157 for (i = 0; i < uiaa->uiaa_nifaces; i++) { 158 if (uiaa->uiaa_ifaces[i] != NULL) { 159 id = usbd_get_interface_descriptor(uiaa->uiaa_ifaces[i]); 160 if (id != NULL && id->bInterfaceNumber == data_ifcno) { 161 sc->sc_data_iface = uiaa->uiaa_ifaces[i]; 162 uiaa->uiaa_ifaces[i] = NULL; 163 } 164 } 165 } 166 if (sc->sc_data_iface == NULL) { 167 aprint_error_dev(self, "no data interface\n"); 168 goto bad; 169 } 170 171 /* 172 * Find the bulk endpoints. 173 * Iterate over all endpoints in the data interface and take note. 174 */ 175 ucaa->ucaa_bulkin = ucaa->ucaa_bulkout = -1; 176 177 id = usbd_get_interface_descriptor(sc->sc_data_iface); 178 for (i = 0; i < id->bNumEndpoints; i++) { 179 ed = usbd_interface2endpoint_descriptor(sc->sc_data_iface, i); 180 if (ed == NULL) { 181 aprint_error_dev(self, 182 "no endpoint descriptor for %d\n)", i); 183 goto bad; 184 } 185 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 186 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 187 ucaa->ucaa_bulkin = ed->bEndpointAddress; 188 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 189 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 190 ucaa->ucaa_bulkout = ed->bEndpointAddress; 191 } 192 } 193 194 if (ucaa->ucaa_bulkin == -1) { 195 aprint_error_dev(self, "Could not find data bulk in\n"); 196 goto bad; 197 } 198 if (ucaa->ucaa_bulkout == -1) { 199 aprint_error_dev(self, "Could not find data bulk out\n"); 200 goto bad; 201 } 202 203 if (usbd_get_quirks(sc->sc_udev)->uq_flags & UQ_ASSUME_CM_OVER_DATA) { 204 sc->sc_cm_over_data = 1; 205 } else { 206 if (sc->sc_cm_cap & USB_CDC_CM_OVER_DATA) { 207 if (sc->sc_acm_cap & USB_CDC_ACM_HAS_FEATURE) 208 err = umodem_set_comm_feature(sc, 209 UCDC_ABSTRACT_STATE, UCDC_DATA_MULTIPLEXED); 210 else 211 err = 0; 212 if (err) { 213 aprint_error_dev(self, 214 "could not set data multiplex mode\n"); 215 goto bad; 216 } 217 sc->sc_cm_over_data = 1; 218 } 219 } 220 221 /* 222 * The standard allows for notification messages (to indicate things 223 * like a modem hangup) to come in via an interrupt endpoint 224 * off of the control interface. Iterate over the endpoints on 225 * the control interface and see if there are any interrupt 226 * endpoints; if there are, then register it. 227 */ 228 229 sc->sc_ctl_notify = -1; 230 sc->sc_notify_pipe = NULL; 231 232 id = usbd_get_interface_descriptor(sc->sc_ctl_iface); 233 for (i = 0; i < id->bNumEndpoints; i++) { 234 ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i); 235 if (ed == NULL) 236 continue; 237 238 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 239 (ed->bmAttributes & UE_XFERTYPE) == UE_INTERRUPT) { 240 aprint_verbose_dev(self, 241 "status change notification available\n"); 242 sc->sc_ctl_notify = ed->bEndpointAddress; 243 } 244 } 245 246 sc->sc_dtr = -1; 247 248 /* 249 * ucaa_bulkin, ucaa_bulkout set above. ucaa_ibufsize, 250 * ucaa_ibufsize, ucaa_obufsize may be initialised by caller 251 */ 252 if (ucaa->ucaa_ibufsize == 0) 253 ucaa->ucaa_ibufsize = UMODEMIBUFSIZE; 254 if (ucaa->ucaa_obufsize == 0) 255 ucaa->ucaa_obufsize = UMODEMOBUFSIZE; 256 if (ucaa->ucaa_ibufsizepad == 0) 257 ucaa->ucaa_ibufsizepad = UMODEMIBUFSIZE; 258 ucaa->ucaa_opkthdrlen = 0; 259 ucaa->ucaa_device = sc->sc_udev; 260 ucaa->ucaa_iface = sc->sc_data_iface; 261 ucaa->ucaa_arg = sc; 262 263 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 264 265 DPRINTF(("umodem_common_attach: sc=%p\n", sc)); 266 sc->sc_subdev = config_found(self, ucaa, ucomprint, 267 CFARG_SUBMATCH, ucomsubmatch, 268 CFARG_EOL); 269 270 return 0; 271 272 bad: 273 sc->sc_dying = true; 274 return 1; 275 } 276 277 int 278 umodem_open(void *addr, int portno) 279 { 280 struct umodem_softc *sc = addr; 281 int err; 282 283 if (sc->sc_dying) 284 return EIO; 285 286 DPRINTF(("umodem_open: sc=%p\n", sc)); 287 288 if (sc->sc_ctl_notify != -1 && sc->sc_notify_pipe == NULL) { 289 err = usbd_open_pipe_intr(sc->sc_ctl_iface, sc->sc_ctl_notify, 290 USBD_SHORT_XFER_OK, &sc->sc_notify_pipe, sc, 291 &sc->sc_notify_buf, sizeof(sc->sc_notify_buf), 292 umodem_intr, USBD_DEFAULT_INTERVAL); 293 294 if (err) { 295 DPRINTF(("Failed to establish notify pipe: %s\n", 296 usbd_errstr(err))); 297 return EIO; 298 } 299 } 300 301 return 0; 302 } 303 304 static void 305 umodem_close_pipe(struct umodem_softc *sc) 306 { 307 308 if (sc->sc_notify_pipe != NULL) { 309 usbd_abort_pipe(sc->sc_notify_pipe); 310 usbd_close_pipe(sc->sc_notify_pipe); 311 sc->sc_notify_pipe = NULL; 312 } 313 } 314 315 void 316 umodem_close(void *addr, int portno) 317 { 318 struct umodem_softc *sc = addr; 319 320 DPRINTF(("umodem_close: sc=%p\n", sc)); 321 322 if (sc->sc_dying) 323 return; 324 325 umodem_close_pipe(sc); 326 } 327 328 static void 329 umodem_intr(struct usbd_xfer *xfer, void *priv, 330 usbd_status status) 331 { 332 struct umodem_softc *sc = priv; 333 u_char mstatus; 334 335 if (sc->sc_dying) 336 return; 337 338 if (status != USBD_NORMAL_COMPLETION) { 339 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 340 return; 341 printf("%s: abnormal status: %s\n", device_xname(sc->sc_dev), 342 usbd_errstr(status)); 343 if (status == USBD_STALLED) 344 usbd_clear_endpoint_stall_async(sc->sc_notify_pipe); 345 return; 346 } 347 348 if (sc->sc_notify_buf.bmRequestType != UCDC_NOTIFICATION) { 349 DPRINTF(("%s: unknown message type (%02x) on notify pipe\n", 350 device_xname(sc->sc_dev), 351 sc->sc_notify_buf.bmRequestType)); 352 return; 353 } 354 355 switch (sc->sc_notify_buf.bNotification) { 356 case UCDC_N_SERIAL_STATE: 357 /* 358 * Set the serial state in ucom driver based on 359 * the bits from the notify message 360 */ 361 if (UGETW(sc->sc_notify_buf.wLength) != 2) { 362 printf("%s: Invalid notification length! (%d)\n", 363 device_xname(sc->sc_dev), 364 UGETW(sc->sc_notify_buf.wLength)); 365 break; 366 } 367 DPRINTF(("%s: notify bytes = %02x%02x\n", 368 device_xname(sc->sc_dev), 369 sc->sc_notify_buf.data[0], 370 sc->sc_notify_buf.data[1])); 371 /* Currently, lsr is always zero. */ 372 sc->sc_lsr = sc->sc_msr = 0; 373 mstatus = sc->sc_notify_buf.data[0]; 374 375 if (ISSET(mstatus, UCDC_N_SERIAL_RI)) 376 sc->sc_msr |= UMSR_RI; 377 if (ISSET(mstatus, UCDC_N_SERIAL_DSR)) 378 sc->sc_msr |= UMSR_DSR; 379 if (ISSET(mstatus, UCDC_N_SERIAL_DCD)) 380 sc->sc_msr |= UMSR_DCD; 381 ucom_status_change(device_private(sc->sc_subdev)); 382 break; 383 default: 384 DPRINTF(("%s: unknown notify message: %02x\n", 385 device_xname(sc->sc_dev), 386 sc->sc_notify_buf.bNotification)); 387 break; 388 } 389 } 390 391 int 392 umodem_get_caps(struct usbd_device *dev, int *cm, int *acm, 393 usb_interface_descriptor_t *id) 394 { 395 const usb_cdc_cm_descriptor_t *cmd; 396 const usb_cdc_acm_descriptor_t *cad; 397 const usb_cdc_union_descriptor_t *cud; 398 uint32_t uq_flags; 399 400 *cm = *acm = 0; 401 uq_flags = usbd_get_quirks(dev)->uq_flags; 402 403 if (uq_flags & UQ_NO_UNION_NRM) { 404 DPRINTF(("umodem_get_caps: NO_UNION_NRM quirk - returning 0\n")); 405 return 0; 406 } 407 408 if (uq_flags & UQ_LOST_CS_DESC) 409 id = NULL; 410 411 cmd = (const usb_cdc_cm_descriptor_t *)usb_find_desc_if(dev, 412 UDESC_CS_INTERFACE, 413 UDESCSUB_CDC_CM, id); 414 if (cmd == NULL) { 415 DPRINTF(("umodem_get_caps: no CM desc\n")); 416 } else { 417 *cm = cmd->bmCapabilities; 418 } 419 420 cad = (const usb_cdc_acm_descriptor_t *)usb_find_desc_if(dev, 421 UDESC_CS_INTERFACE, 422 UDESCSUB_CDC_ACM, 423 id); 424 if (cad == NULL) { 425 DPRINTF(("umodem_get_caps: no ACM desc\n")); 426 } else { 427 *acm = cad->bmCapabilities; 428 } 429 430 cud = (const usb_cdc_union_descriptor_t *)usb_find_desc_if(dev, 431 UDESC_CS_INTERFACE, 432 UDESCSUB_CDC_UNION, 433 id); 434 if (cud == NULL) { 435 DPRINTF(("umodem_get_caps: no UNION desc\n")); 436 } 437 438 return cmd ? cmd->bDataInterface : cud ? cud->bSlaveInterface[0] : -1; 439 } 440 441 void 442 umodem_get_status(void *addr, int portno, u_char *lsr, u_char *msr) 443 { 444 struct umodem_softc *sc = addr; 445 446 DPRINTF(("umodem_get_status:\n")); 447 448 *lsr = sc->sc_lsr; 449 *msr = sc->sc_msr; 450 } 451 452 int 453 umodem_param(void *addr, int portno, struct termios *t) 454 { 455 struct umodem_softc *sc = addr; 456 usbd_status err; 457 usb_cdc_line_state_t ls; 458 459 DPRINTF(("umodem_param: sc=%p\n", sc)); 460 461 if (sc->sc_dying) 462 return EIO; 463 464 USETDW(ls.dwDTERate, t->c_ospeed); 465 if (ISSET(t->c_cflag, CSTOPB)) 466 ls.bCharFormat = UCDC_STOP_BIT_2; 467 else 468 ls.bCharFormat = UCDC_STOP_BIT_1; 469 if (ISSET(t->c_cflag, PARENB)) { 470 if (ISSET(t->c_cflag, PARODD)) 471 ls.bParityType = UCDC_PARITY_ODD; 472 else 473 ls.bParityType = UCDC_PARITY_EVEN; 474 } else 475 ls.bParityType = UCDC_PARITY_NONE; 476 switch (ISSET(t->c_cflag, CSIZE)) { 477 case CS5: 478 ls.bDataBits = 5; 479 break; 480 case CS6: 481 ls.bDataBits = 6; 482 break; 483 case CS7: 484 ls.bDataBits = 7; 485 break; 486 case CS8: 487 ls.bDataBits = 8; 488 break; 489 } 490 491 err = umodem_set_line_coding(sc, &ls); 492 if (err) { 493 DPRINTF(("umodem_param: err=%s\n", usbd_errstr(err))); 494 return EPASSTHROUGH; 495 } 496 return 0; 497 } 498 499 int 500 umodem_ioctl(void *addr, int portno, u_long cmd, void *data, 501 int flag, proc_t *p) 502 { 503 struct umodem_softc *sc = addr; 504 int error = 0; 505 506 DPRINTF(("umodem_ioctl: cmd=0x%08lx\n", cmd)); 507 508 if (sc->sc_dying) 509 return EIO; 510 511 switch (cmd) { 512 case USB_GET_CM_OVER_DATA: 513 *(int *)data = sc->sc_cm_over_data; 514 break; 515 516 case USB_SET_CM_OVER_DATA: 517 if (*(int *)data != sc->sc_cm_over_data) { 518 /* XXX change it */ 519 } 520 break; 521 522 default: 523 DPRINTF(("umodem_ioctl: unknown\n")); 524 error = EPASSTHROUGH; 525 break; 526 } 527 528 return error; 529 } 530 531 static void 532 umodem_dtr(struct umodem_softc *sc, int onoff) 533 { 534 DPRINTF(("umodem_dtr: onoff=%d\n", onoff)); 535 536 if (sc->sc_dtr == onoff) 537 return; 538 sc->sc_dtr = onoff; 539 540 umodem_set_line_state(sc); 541 } 542 543 static void 544 umodem_rts(struct umodem_softc *sc, int onoff) 545 { 546 DPRINTF(("umodem_rts: onoff=%d\n", onoff)); 547 548 if (sc->sc_rts == onoff) 549 return; 550 sc->sc_rts = onoff; 551 552 umodem_set_line_state(sc); 553 } 554 555 static void 556 umodem_set_line_state(struct umodem_softc *sc) 557 { 558 usb_device_request_t req; 559 int ls; 560 561 ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) | 562 (sc->sc_rts ? UCDC_LINE_RTS : 0); 563 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 564 req.bRequest = UCDC_SET_CONTROL_LINE_STATE; 565 USETW(req.wValue, ls); 566 USETW(req.wIndex, sc->sc_ctl_iface_no); 567 USETW(req.wLength, 0); 568 569 (void)usbd_do_request(sc->sc_udev, &req, 0); 570 571 } 572 573 static void 574 umodem_break(struct umodem_softc *sc, int onoff) 575 { 576 usb_device_request_t req; 577 578 DPRINTF(("umodem_break: onoff=%d\n", onoff)); 579 580 if (!(sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK)) 581 return; 582 583 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 584 req.bRequest = UCDC_SEND_BREAK; 585 USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF); 586 USETW(req.wIndex, sc->sc_ctl_iface_no); 587 USETW(req.wLength, 0); 588 589 (void)usbd_do_request(sc->sc_udev, &req, 0); 590 } 591 592 void 593 umodem_set(void *addr, int portno, int reg, int onoff) 594 { 595 struct umodem_softc *sc = addr; 596 597 if (sc->sc_dying) 598 return; 599 600 switch (reg) { 601 case UCOM_SET_DTR: 602 umodem_dtr(sc, onoff); 603 break; 604 case UCOM_SET_RTS: 605 umodem_rts(sc, onoff); 606 break; 607 case UCOM_SET_BREAK: 608 umodem_break(sc, onoff); 609 break; 610 default: 611 break; 612 } 613 } 614 615 static usbd_status 616 umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state) 617 { 618 usb_device_request_t req; 619 usbd_status err; 620 621 DPRINTF(("umodem_set_line_coding: rate=%d fmt=%d parity=%d bits=%d\n", 622 UGETDW(state->dwDTERate), state->bCharFormat, 623 state->bParityType, state->bDataBits)); 624 625 if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) { 626 DPRINTF(("umodem_set_line_coding: already set\n")); 627 return USBD_NORMAL_COMPLETION; 628 } 629 630 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 631 req.bRequest = UCDC_SET_LINE_CODING; 632 USETW(req.wValue, 0); 633 USETW(req.wIndex, sc->sc_ctl_iface_no); 634 USETW(req.wLength, UCDC_LINE_STATE_LENGTH); 635 636 err = usbd_do_request(sc->sc_udev, &req, state); 637 if (err) { 638 DPRINTF(("umodem_set_line_coding: failed, err=%s\n", 639 usbd_errstr(err))); 640 return err; 641 } 642 643 sc->sc_line_state = *state; 644 645 return USBD_NORMAL_COMPLETION; 646 } 647 648 static usbd_status 649 umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state) 650 { 651 usb_device_request_t req; 652 usbd_status err; 653 usb_cdc_abstract_state_t ast; 654 655 DPRINTF(("umodem_set_comm_feature: feature=%d state=%d\n", feature, 656 state)); 657 658 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 659 req.bRequest = UCDC_SET_COMM_FEATURE; 660 USETW(req.wValue, feature); 661 USETW(req.wIndex, sc->sc_ctl_iface_no); 662 USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH); 663 USETW(ast.wState, state); 664 665 err = usbd_do_request(sc->sc_udev, &req, &ast); 666 if (err) { 667 DPRINTF(("umodem_set_comm_feature: feature=%d, err=%s\n", 668 feature, usbd_errstr(err))); 669 return err; 670 } 671 672 return USBD_NORMAL_COMPLETION; 673 } 674 675 void 676 umodem_common_childdet(struct umodem_softc *sc, device_t child) 677 { 678 KASSERT(sc->sc_subdev == child); 679 sc->sc_subdev = NULL; 680 } 681 682 int 683 umodem_common_detach(struct umodem_softc *sc, int flags) 684 { 685 int rv = 0; 686 687 DPRINTF(("umodem_common_detach: sc=%p flags=%d\n", sc, flags)); 688 689 sc->sc_dying = true; 690 691 umodem_close_pipe(sc); 692 693 if (sc->sc_subdev != NULL) { 694 rv = config_detach(sc->sc_subdev, flags); 695 sc->sc_subdev = NULL; 696 } 697 698 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 699 700 return rv; 701 } 702
Indexes created Mon Sep 29 21:09:56 GMT 2025