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 (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 1.36 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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
Indexes created Wed Sep 24 05:09:52 GMT 2025