umodem_common.c revision 1.25
1 /* $NetBSD: umodem_common.c,v 1.25 2016/11/25 12:56:29 skrll 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 1.25 2016/11/25 12:56:29 skrll 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; 123 124 aprint_naive("\n"); 125 aprint_normal("\n"); 126 127 id = usbd_get_interface_descriptor(sc->sc_ctl_iface); 128 devinfop = usbd_devinfo_alloc(uiaa->uiaa_device, 0); 129 aprint_normal_dev(self, "%s, iclass %d/%d\n", 130 devinfop, id->bInterfaceClass, id->bInterfaceSubClass); 131 usbd_devinfo_free(devinfop); 132 133 sc->sc_ctl_iface_no = id->bInterfaceNumber; 134 135 /* Get the data interface no. */ 136 sc->sc_data_iface_no = data_ifcno = 137 umodem_get_caps(dev, &sc->sc_cm_cap, &sc->sc_acm_cap, id); 138 139 if (data_ifcno == -1) { 140 aprint_error_dev(self, "no pointer to data interface\n"); 141 goto bad; 142 } 143 144 aprint_normal_dev(self, 145 "data interface %d, has %sCM over data, has %sbreak\n", 146 data_ifcno, sc->sc_cm_cap & USB_CDC_CM_OVER_DATA ? "" : "no ", 147 sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK ? "" : "no "); 148 149 /* Get the data interface too. */ 150 for (i = 0; i < uiaa->uiaa_nifaces; i++) { 151 if (uiaa->uiaa_ifaces[i] != NULL) { 152 id = usbd_get_interface_descriptor(uiaa->uiaa_ifaces[i]); 153 if (id != NULL && id->bInterfaceNumber == data_ifcno) { 154 sc->sc_data_iface = uiaa->uiaa_ifaces[i]; 155 uiaa->uiaa_ifaces[i] = NULL; 156 } 157 } 158 } 159 if (sc->sc_data_iface == NULL) { 160 aprint_error_dev(self, "no data interface\n"); 161 goto bad; 162 } 163 164 /* 165 * Find the bulk endpoints. 166 * Iterate over all endpoints in the data interface and take note. 167 */ 168 ucaa->ucaa_bulkin = ucaa->ucaa_bulkout = -1; 169 170 id = usbd_get_interface_descriptor(sc->sc_data_iface); 171 for (i = 0; i < id->bNumEndpoints; i++) { 172 ed = usbd_interface2endpoint_descriptor(sc->sc_data_iface, i); 173 if (ed == NULL) { 174 aprint_error_dev(self, 175 "no endpoint descriptor for %d\n)", i); 176 goto bad; 177 } 178 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 179 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 180 ucaa->ucaa_bulkin = ed->bEndpointAddress; 181 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 182 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 183 ucaa->ucaa_bulkout = ed->bEndpointAddress; 184 } 185 } 186 187 if (ucaa->ucaa_bulkin == -1) { 188 aprint_error_dev(self, "Could not find data bulk in\n"); 189 goto bad; 190 } 191 if (ucaa->ucaa_bulkout == -1) { 192 aprint_error_dev(self, "Could not find data bulk out\n"); 193 goto bad; 194 } 195 196 if (usbd_get_quirks(sc->sc_udev)->uq_flags & UQ_ASSUME_CM_OVER_DATA) { 197 sc->sc_cm_over_data = 1; 198 } else { 199 if (sc->sc_cm_cap & USB_CDC_CM_OVER_DATA) { 200 if (sc->sc_acm_cap & USB_CDC_ACM_HAS_FEATURE) 201 err = umodem_set_comm_feature(sc, 202 UCDC_ABSTRACT_STATE, UCDC_DATA_MULTIPLEXED); 203 else 204 err = 0; 205 if (err) { 206 aprint_error_dev(self, 207 "could not set data multiplex mode\n"); 208 goto bad; 209 } 210 sc->sc_cm_over_data = 1; 211 } 212 } 213 214 /* 215 * The standard allows for notification messages (to indicate things 216 * like a modem hangup) to come in via an interrupt endpoint 217 * off of the control interface. Iterate over the endpoints on 218 * the control interface and see if there are any interrupt 219 * endpoints; if there are, then register it. 220 */ 221 222 sc->sc_ctl_notify = -1; 223 sc->sc_notify_pipe = NULL; 224 225 id = usbd_get_interface_descriptor(sc->sc_ctl_iface); 226 for (i = 0; i < id->bNumEndpoints; i++) { 227 ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i); 228 if (ed == NULL) 229 continue; 230 231 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 232 (ed->bmAttributes & UE_XFERTYPE) == UE_INTERRUPT) { 233 aprint_error_dev(self, 234 "status change notification available\n"); 235 sc->sc_ctl_notify = ed->bEndpointAddress; 236 } 237 } 238 239 sc->sc_dtr = -1; 240 241 /* ucaa_bulkin, ucaa_bulkout set above */ 242 ucaa->ucaa_ibufsize = UMODEMIBUFSIZE; 243 ucaa->ucaa_obufsize = UMODEMOBUFSIZE; 244 ucaa->ucaa_ibufsizepad = UMODEMIBUFSIZE; 245 ucaa->ucaa_opkthdrlen = 0; 246 ucaa->ucaa_device = sc->sc_udev; 247 ucaa->ucaa_iface = sc->sc_data_iface; 248 ucaa->ucaa_arg = sc; 249 250 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 251 252 DPRINTF(("umodem_common_attach: sc=%p\n", sc)); 253 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, ucaa, 254 ucomprint, ucomsubmatch); 255 256 return 0; 257 258 bad: 259 sc->sc_dying = 1; 260 return 1; 261 } 262 263 int 264 umodem_open(void *addr, int portno) 265 { 266 struct umodem_softc *sc = addr; 267 int err; 268 269 DPRINTF(("umodem_open: sc=%p\n", sc)); 270 271 if (sc->sc_ctl_notify != -1 && sc->sc_notify_pipe == NULL) { 272 err = usbd_open_pipe_intr(sc->sc_ctl_iface, sc->sc_ctl_notify, 273 USBD_SHORT_XFER_OK, &sc->sc_notify_pipe, sc, 274 &sc->sc_notify_buf, sizeof(sc->sc_notify_buf), 275 umodem_intr, USBD_DEFAULT_INTERVAL); 276 277 if (err) { 278 DPRINTF(("Failed to establish notify pipe: %s\n", 279 usbd_errstr(err))); 280 return EIO; 281 } 282 } 283 284 return 0; 285 } 286 287 void 288 umodem_close(void *addr, int portno) 289 { 290 struct umodem_softc *sc = addr; 291 int err; 292 293 DPRINTF(("umodem_close: sc=%p\n", sc)); 294 295 if (sc->sc_notify_pipe != NULL) { 296 err = usbd_abort_pipe(sc->sc_notify_pipe); 297 if (err) 298 printf("%s: abort notify pipe failed: %s\n", 299 device_xname(sc->sc_dev), usbd_errstr(err)); 300 err = usbd_close_pipe(sc->sc_notify_pipe); 301 if (err) 302 printf("%s: close notify pipe failed: %s\n", 303 device_xname(sc->sc_dev), usbd_errstr(err)); 304 sc->sc_notify_pipe = NULL; 305 } 306 } 307 308 Static void 309 umodem_intr(struct usbd_xfer *xfer, void *priv, 310 usbd_status status) 311 { 312 struct umodem_softc *sc = priv; 313 u_char mstatus; 314 315 if (sc->sc_dying) 316 return; 317 318 if (status != USBD_NORMAL_COMPLETION) { 319 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 320 return; 321 printf("%s: abnormal status: %s\n", device_xname(sc->sc_dev), 322 usbd_errstr(status)); 323 if (status == USBD_STALLED) 324 usbd_clear_endpoint_stall_async(sc->sc_notify_pipe); 325 return; 326 } 327 328 if (sc->sc_notify_buf.bmRequestType != UCDC_NOTIFICATION) { 329 DPRINTF(("%s: unknown message type (%02x) on notify pipe\n", 330 device_xname(sc->sc_dev), 331 sc->sc_notify_buf.bmRequestType)); 332 return; 333 } 334 335 switch (sc->sc_notify_buf.bNotification) { 336 case UCDC_N_SERIAL_STATE: 337 /* 338 * Set the serial state in ucom driver based on 339 * the bits from the notify message 340 */ 341 if (UGETW(sc->sc_notify_buf.wLength) != 2) { 342 printf("%s: Invalid notification length! (%d)\n", 343 device_xname(sc->sc_dev), 344 UGETW(sc->sc_notify_buf.wLength)); 345 break; 346 } 347 DPRINTF(("%s: notify bytes = %02x%02x\n", 348 device_xname(sc->sc_dev), 349 sc->sc_notify_buf.data[0], 350 sc->sc_notify_buf.data[1])); 351 /* Currently, lsr is always zero. */ 352 sc->sc_lsr = sc->sc_msr = 0; 353 mstatus = sc->sc_notify_buf.data[0]; 354 355 if (ISSET(mstatus, UCDC_N_SERIAL_RI)) 356 sc->sc_msr |= UMSR_RI; 357 if (ISSET(mstatus, UCDC_N_SERIAL_DSR)) 358 sc->sc_msr |= UMSR_DSR; 359 if (ISSET(mstatus, UCDC_N_SERIAL_DCD)) 360 sc->sc_msr |= UMSR_DCD; 361 ucom_status_change(device_private(sc->sc_subdev)); 362 break; 363 default: 364 DPRINTF(("%s: unknown notify message: %02x\n", 365 device_xname(sc->sc_dev), 366 sc->sc_notify_buf.bNotification)); 367 break; 368 } 369 } 370 371 int 372 umodem_get_caps(struct usbd_device *dev, int *cm, int *acm, 373 usb_interface_descriptor_t *id) 374 { 375 const usb_cdc_cm_descriptor_t *cmd; 376 const usb_cdc_acm_descriptor_t *cad; 377 const usb_cdc_union_descriptor_t *cud; 378 uint32_t uq_flags; 379 380 *cm = *acm = 0; 381 uq_flags = usbd_get_quirks(dev)->uq_flags; 382 383 if (uq_flags & UQ_NO_UNION_NRM) { 384 DPRINTF(("umodem_get_caps: NO_UNION_NRM quirk - returning 0\n")); 385 return 0; 386 } 387 388 if (uq_flags & UQ_LOST_CS_DESC) 389 id = NULL; 390 391 cmd = (const usb_cdc_cm_descriptor_t *)usb_find_desc_if(dev, 392 UDESC_CS_INTERFACE, 393 UDESCSUB_CDC_CM, id); 394 if (cmd == NULL) { 395 DPRINTF(("umodem_get_caps: no CM desc\n")); 396 } else { 397 *cm = cmd->bmCapabilities; 398 } 399 400 cad = (const usb_cdc_acm_descriptor_t *)usb_find_desc_if(dev, 401 UDESC_CS_INTERFACE, 402 UDESCSUB_CDC_ACM, 403 id); 404 if (cad == NULL) { 405 DPRINTF(("umodem_get_caps: no ACM desc\n")); 406 } else { 407 *acm = cad->bmCapabilities; 408 } 409 410 cud = (const usb_cdc_union_descriptor_t *)usb_find_desc_if(dev, 411 UDESC_CS_INTERFACE, 412 UDESCSUB_CDC_UNION, 413 id); 414 if (cud == NULL) { 415 DPRINTF(("umodem_get_caps: no UNION desc\n")); 416 } 417 418 return cmd ? cmd->bDataInterface : cud ? cud->bSlaveInterface[0] : -1; 419 } 420 421 void 422 umodem_get_status(void *addr, int portno, u_char *lsr, u_char *msr) 423 { 424 struct umodem_softc *sc = addr; 425 426 DPRINTF(("umodem_get_status:\n")); 427 428 if (lsr != NULL) 429 *lsr = sc->sc_lsr; 430 if (msr != NULL) 431 *msr = sc->sc_msr; 432 } 433 434 int 435 umodem_param(void *addr, int portno, struct termios *t) 436 { 437 struct umodem_softc *sc = addr; 438 usbd_status err; 439 usb_cdc_line_state_t ls; 440 441 DPRINTF(("umodem_param: sc=%p\n", sc)); 442 443 USETDW(ls.dwDTERate, t->c_ospeed); 444 if (ISSET(t->c_cflag, CSTOPB)) 445 ls.bCharFormat = UCDC_STOP_BIT_2; 446 else 447 ls.bCharFormat = UCDC_STOP_BIT_1; 448 if (ISSET(t->c_cflag, PARENB)) { 449 if (ISSET(t->c_cflag, PARODD)) 450 ls.bParityType = UCDC_PARITY_ODD; 451 else 452 ls.bParityType = UCDC_PARITY_EVEN; 453 } else 454 ls.bParityType = UCDC_PARITY_NONE; 455 switch (ISSET(t->c_cflag, CSIZE)) { 456 case CS5: 457 ls.bDataBits = 5; 458 break; 459 case CS6: 460 ls.bDataBits = 6; 461 break; 462 case CS7: 463 ls.bDataBits = 7; 464 break; 465 case CS8: 466 ls.bDataBits = 8; 467 break; 468 } 469 470 err = umodem_set_line_coding(sc, &ls); 471 if (err) { 472 DPRINTF(("umodem_param: err=%s\n", usbd_errstr(err))); 473 return EPASSTHROUGH; 474 } 475 return 0; 476 } 477 478 int 479 umodem_ioctl(void *addr, int portno, u_long cmd, void *data, 480 int flag, proc_t *p) 481 { 482 struct umodem_softc *sc = addr; 483 int error = 0; 484 485 if (sc->sc_dying) 486 return EIO; 487 488 DPRINTF(("umodem_ioctl: cmd=0x%08lx\n", cmd)); 489 490 switch (cmd) { 491 case USB_GET_CM_OVER_DATA: 492 *(int *)data = sc->sc_cm_over_data; 493 break; 494 495 case USB_SET_CM_OVER_DATA: 496 if (*(int *)data != sc->sc_cm_over_data) { 497 /* XXX change it */ 498 } 499 break; 500 501 default: 502 DPRINTF(("umodem_ioctl: unknown\n")); 503 error = EPASSTHROUGH; 504 break; 505 } 506 507 return error; 508 } 509 510 void 511 umodem_dtr(struct umodem_softc *sc, int onoff) 512 { 513 DPRINTF(("umodem_dtr: onoff=%d\n", onoff)); 514 515 if (sc->sc_dtr == onoff) 516 return; 517 sc->sc_dtr = onoff; 518 519 umodem_set_line_state(sc); 520 } 521 522 void 523 umodem_rts(struct umodem_softc *sc, int onoff) 524 { 525 DPRINTF(("umodem_rts: onoff=%d\n", onoff)); 526 527 if (sc->sc_rts == onoff) 528 return; 529 sc->sc_rts = onoff; 530 531 umodem_set_line_state(sc); 532 } 533 534 void 535 umodem_set_line_state(struct umodem_softc *sc) 536 { 537 usb_device_request_t req; 538 int ls; 539 540 ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) | 541 (sc->sc_rts ? UCDC_LINE_RTS : 0); 542 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 543 req.bRequest = UCDC_SET_CONTROL_LINE_STATE; 544 USETW(req.wValue, ls); 545 USETW(req.wIndex, sc->sc_ctl_iface_no); 546 USETW(req.wLength, 0); 547 548 (void)usbd_do_request(sc->sc_udev, &req, 0); 549 550 } 551 552 void 553 umodem_break(struct umodem_softc *sc, int onoff) 554 { 555 usb_device_request_t req; 556 557 DPRINTF(("umodem_break: onoff=%d\n", onoff)); 558 559 if (!(sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK)) 560 return; 561 562 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 563 req.bRequest = UCDC_SEND_BREAK; 564 USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF); 565 USETW(req.wIndex, sc->sc_ctl_iface_no); 566 USETW(req.wLength, 0); 567 568 (void)usbd_do_request(sc->sc_udev, &req, 0); 569 } 570 571 void 572 umodem_set(void *addr, int portno, int reg, int onoff) 573 { 574 struct umodem_softc *sc = addr; 575 576 switch (reg) { 577 case UCOM_SET_DTR: 578 umodem_dtr(sc, onoff); 579 break; 580 case UCOM_SET_RTS: 581 umodem_rts(sc, onoff); 582 break; 583 case UCOM_SET_BREAK: 584 umodem_break(sc, onoff); 585 break; 586 default: 587 break; 588 } 589 } 590 591 usbd_status 592 umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state) 593 { 594 usb_device_request_t req; 595 usbd_status err; 596 597 DPRINTF(("umodem_set_line_coding: rate=%d fmt=%d parity=%d bits=%d\n", 598 UGETDW(state->dwDTERate), state->bCharFormat, 599 state->bParityType, state->bDataBits)); 600 601 if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) { 602 DPRINTF(("umodem_set_line_coding: already set\n")); 603 return USBD_NORMAL_COMPLETION; 604 } 605 606 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 607 req.bRequest = UCDC_SET_LINE_CODING; 608 USETW(req.wValue, 0); 609 USETW(req.wIndex, sc->sc_ctl_iface_no); 610 USETW(req.wLength, UCDC_LINE_STATE_LENGTH); 611 612 err = usbd_do_request(sc->sc_udev, &req, state); 613 if (err) { 614 DPRINTF(("umodem_set_line_coding: failed, err=%s\n", 615 usbd_errstr(err))); 616 return err; 617 } 618 619 sc->sc_line_state = *state; 620 621 return USBD_NORMAL_COMPLETION; 622 } 623 624 usbd_status 625 umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state) 626 { 627 usb_device_request_t req; 628 usbd_status err; 629 usb_cdc_abstract_state_t ast; 630 631 DPRINTF(("umodem_set_comm_feature: feature=%d state=%d\n", feature, 632 state)); 633 634 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 635 req.bRequest = UCDC_SET_COMM_FEATURE; 636 USETW(req.wValue, feature); 637 USETW(req.wIndex, sc->sc_ctl_iface_no); 638 USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH); 639 USETW(ast.wState, state); 640 641 err = usbd_do_request(sc->sc_udev, &req, &ast); 642 if (err) { 643 DPRINTF(("umodem_set_comm_feature: feature=%d, err=%s\n", 644 feature, usbd_errstr(err))); 645 return err; 646 } 647 648 return USBD_NORMAL_COMPLETION; 649 } 650 651 int 652 umodem_common_activate(struct umodem_softc *sc, enum devact act) 653 { 654 switch (act) { 655 case DVACT_DEACTIVATE: 656 sc->sc_dying = 1; 657 return 0; 658 default: 659 return EOPNOTSUPP; 660 } 661 } 662 663 void 664 umodem_common_childdet(struct umodem_softc *sc, device_t child) 665 { 666 KASSERT(sc->sc_subdev == child); 667 sc->sc_subdev = NULL; 668 } 669 670 int 671 umodem_common_detach(struct umodem_softc *sc, int flags) 672 { 673 int rv = 0; 674 675 DPRINTF(("umodem_common_detach: sc=%p flags=%d\n", sc, flags)); 676 677 sc->sc_dying = 1; 678 679 if (sc->sc_subdev != NULL) 680 rv = config_detach(sc->sc_subdev, flags); 681 682 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 683 684 return rv; 685 } 686
Indexes created Wed Sep 24 05:09:52 GMT 2025