umodem_common.c revision 1.28
1 /* $NetBSD: umodem_common.c,v 1.28 2019/05/04 08:04:13 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 1.28 2019/05/04 08:04:13 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_refcnt = 0; 124 sc->sc_dying = false; 125 126 aprint_naive("\n"); 127 aprint_normal("\n"); 128 129 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_SOFTUSB); 130 cv_init(&sc->sc_detach_cv, "umodemdet"); 131 132 id = usbd_get_interface_descriptor(sc->sc_ctl_iface); 133 devinfop = usbd_devinfo_alloc(uiaa->uiaa_device, 0); 134 aprint_normal_dev(self, "%s, iclass %d/%d\n", 135 devinfop, id->bInterfaceClass, id->bInterfaceSubClass); 136 usbd_devinfo_free(devinfop); 137 138 sc->sc_ctl_iface_no = id->bInterfaceNumber; 139 140 /* Get the data interface no. */ 141 sc->sc_data_iface_no = data_ifcno = 142 umodem_get_caps(dev, &sc->sc_cm_cap, &sc->sc_acm_cap, id); 143 144 if (data_ifcno == -1) { 145 aprint_error_dev(self, "no pointer to data interface\n"); 146 goto bad; 147 } 148 149 aprint_normal_dev(self, 150 "data interface %d, has %sCM over data, has %sbreak\n", 151 data_ifcno, sc->sc_cm_cap & USB_CDC_CM_OVER_DATA ? "" : "no ", 152 sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK ? "" : "no "); 153 154 /* Get the data interface too. */ 155 for (i = 0; i < uiaa->uiaa_nifaces; i++) { 156 if (uiaa->uiaa_ifaces[i] != NULL) { 157 id = usbd_get_interface_descriptor(uiaa->uiaa_ifaces[i]); 158 if (id != NULL && id->bInterfaceNumber == data_ifcno) { 159 sc->sc_data_iface = uiaa->uiaa_ifaces[i]; 160 uiaa->uiaa_ifaces[i] = NULL; 161 } 162 } 163 } 164 if (sc->sc_data_iface == NULL) { 165 aprint_error_dev(self, "no data interface\n"); 166 goto bad; 167 } 168 169 /* 170 * Find the bulk endpoints. 171 * Iterate over all endpoints in the data interface and take note. 172 */ 173 ucaa->ucaa_bulkin = ucaa->ucaa_bulkout = -1; 174 175 id = usbd_get_interface_descriptor(sc->sc_data_iface); 176 for (i = 0; i < id->bNumEndpoints; i++) { 177 ed = usbd_interface2endpoint_descriptor(sc->sc_data_iface, i); 178 if (ed == NULL) { 179 aprint_error_dev(self, 180 "no endpoint descriptor for %d\n)", i); 181 goto bad; 182 } 183 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 184 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 185 ucaa->ucaa_bulkin = ed->bEndpointAddress; 186 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 187 (ed->bmAttributes & UE_XFERTYPE) == UE_BULK) { 188 ucaa->ucaa_bulkout = ed->bEndpointAddress; 189 } 190 } 191 192 if (ucaa->ucaa_bulkin == -1) { 193 aprint_error_dev(self, "Could not find data bulk in\n"); 194 goto bad; 195 } 196 if (ucaa->ucaa_bulkout == -1) { 197 aprint_error_dev(self, "Could not find data bulk out\n"); 198 goto bad; 199 } 200 201 if (usbd_get_quirks(sc->sc_udev)->uq_flags & UQ_ASSUME_CM_OVER_DATA) { 202 sc->sc_cm_over_data = 1; 203 } else { 204 if (sc->sc_cm_cap & USB_CDC_CM_OVER_DATA) { 205 if (sc->sc_acm_cap & USB_CDC_ACM_HAS_FEATURE) 206 err = umodem_set_comm_feature(sc, 207 UCDC_ABSTRACT_STATE, UCDC_DATA_MULTIPLEXED); 208 else 209 err = 0; 210 if (err) { 211 aprint_error_dev(self, 212 "could not set data multiplex mode\n"); 213 goto bad; 214 } 215 sc->sc_cm_over_data = 1; 216 } 217 } 218 219 /* 220 * The standard allows for notification messages (to indicate things 221 * like a modem hangup) to come in via an interrupt endpoint 222 * off of the control interface. Iterate over the endpoints on 223 * the control interface and see if there are any interrupt 224 * endpoints; if there are, then register it. 225 */ 226 227 sc->sc_ctl_notify = -1; 228 sc->sc_notify_pipe = NULL; 229 230 id = usbd_get_interface_descriptor(sc->sc_ctl_iface); 231 for (i = 0; i < id->bNumEndpoints; i++) { 232 ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i); 233 if (ed == NULL) 234 continue; 235 236 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 237 (ed->bmAttributes & UE_XFERTYPE) == UE_INTERRUPT) { 238 aprint_verbose_dev(self, 239 "status change notification available\n"); 240 sc->sc_ctl_notify = ed->bEndpointAddress; 241 } 242 } 243 244 sc->sc_dtr = -1; 245 246 /* ucaa_bulkin, ucaa_bulkout set above */ 247 ucaa->ucaa_ibufsize = UMODEMIBUFSIZE; 248 ucaa->ucaa_obufsize = UMODEMOBUFSIZE; 249 ucaa->ucaa_ibufsizepad = UMODEMIBUFSIZE; 250 ucaa->ucaa_opkthdrlen = 0; 251 ucaa->ucaa_device = sc->sc_udev; 252 ucaa->ucaa_iface = sc->sc_data_iface; 253 ucaa->ucaa_arg = sc; 254 255 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 256 257 DPRINTF(("umodem_common_attach: sc=%p\n", sc)); 258 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, ucaa, 259 ucomprint, ucomsubmatch); 260 261 return 0; 262 263 bad: 264 sc->sc_dying = true; 265 return 1; 266 } 267 268 int 269 umodem_open(void *addr, int portno) 270 { 271 struct umodem_softc *sc = addr; 272 int err; 273 274 mutex_enter(&sc->sc_lock); 275 if (sc->sc_dying) { 276 mutex_exit(&sc->sc_lock); 277 return EIO; 278 } 279 280 sc->sc_refcnt++; 281 mutex_exit(&sc->sc_lock); 282 283 DPRINTF(("umodem_open: sc=%p\n", sc)); 284 285 if (sc->sc_ctl_notify != -1 && sc->sc_notify_pipe == NULL) { 286 err = usbd_open_pipe_intr(sc->sc_ctl_iface, sc->sc_ctl_notify, 287 USBD_SHORT_XFER_OK, &sc->sc_notify_pipe, sc, 288 &sc->sc_notify_buf, sizeof(sc->sc_notify_buf), 289 umodem_intr, USBD_DEFAULT_INTERVAL); 290 291 if (err) { 292 DPRINTF(("Failed to establish notify pipe: %s\n", 293 usbd_errstr(err))); 294 mutex_enter(&sc->sc_lock); 295 if (--sc->sc_refcnt < 0) 296 cv_broadcast(&sc->sc_detach_cv); 297 mutex_exit(&sc->sc_lock); 298 return EIO; 299 } 300 } 301 302 return 0; 303 } 304 305 void 306 umodem_close(void *addr, int portno) 307 { 308 struct umodem_softc *sc = addr; 309 int err; 310 311 mutex_enter(&sc->sc_lock); 312 if (sc->sc_dying) 313 goto out; 314 mutex_exit(&sc->sc_lock); 315 316 DPRINTF(("umodem_close: sc=%p\n", sc)); 317 318 if (sc->sc_notify_pipe != NULL) { 319 err = usbd_abort_pipe(sc->sc_notify_pipe); 320 if (err) 321 printf("%s: abort notify pipe failed: %s\n", 322 device_xname(sc->sc_dev), usbd_errstr(err)); 323 err = usbd_close_pipe(sc->sc_notify_pipe); 324 if (err) 325 printf("%s: close notify pipe failed: %s\n", 326 device_xname(sc->sc_dev), usbd_errstr(err)); 327 sc->sc_notify_pipe = NULL; 328 } 329 330 mutex_enter(&sc->sc_lock); 331 out: 332 if (--sc->sc_refcnt < 0) 333 cv_broadcast(&sc->sc_detach_cv); 334 mutex_exit(&sc->sc_lock); 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 mutex_enter(&sc->sc_lock); 469 if (sc->sc_dying) 470 return EIO; 471 mutex_exit(&sc->sc_lock); 472 473 DPRINTF(("umodem_param: sc=%p\n", sc)); 474 475 USETDW(ls.dwDTERate, t->c_ospeed); 476 if (ISSET(t->c_cflag, CSTOPB)) 477 ls.bCharFormat = UCDC_STOP_BIT_2; 478 else 479 ls.bCharFormat = UCDC_STOP_BIT_1; 480 if (ISSET(t->c_cflag, PARENB)) { 481 if (ISSET(t->c_cflag, PARODD)) 482 ls.bParityType = UCDC_PARITY_ODD; 483 else 484 ls.bParityType = UCDC_PARITY_EVEN; 485 } else 486 ls.bParityType = UCDC_PARITY_NONE; 487 switch (ISSET(t->c_cflag, CSIZE)) { 488 case CS5: 489 ls.bDataBits = 5; 490 break; 491 case CS6: 492 ls.bDataBits = 6; 493 break; 494 case CS7: 495 ls.bDataBits = 7; 496 break; 497 case CS8: 498 ls.bDataBits = 8; 499 break; 500 } 501 502 err = umodem_set_line_coding(sc, &ls); 503 if (err) { 504 DPRINTF(("umodem_param: err=%s\n", usbd_errstr(err))); 505 return EPASSTHROUGH; 506 } 507 return 0; 508 } 509 510 int 511 umodem_ioctl(void *addr, int portno, u_long cmd, void *data, 512 int flag, proc_t *p) 513 { 514 struct umodem_softc *sc = addr; 515 int error = 0; 516 517 mutex_enter(&sc->sc_lock); 518 if (sc->sc_dying) 519 return EIO; 520 mutex_exit(&sc->sc_lock); 521 522 DPRINTF(("umodem_ioctl: cmd=0x%08lx\n", cmd)); 523 524 switch (cmd) { 525 case USB_GET_CM_OVER_DATA: 526 *(int *)data = sc->sc_cm_over_data; 527 break; 528 529 case USB_SET_CM_OVER_DATA: 530 if (*(int *)data != sc->sc_cm_over_data) { 531 /* XXX change it */ 532 } 533 break; 534 535 default: 536 DPRINTF(("umodem_ioctl: unknown\n")); 537 error = EPASSTHROUGH; 538 break; 539 } 540 541 return error; 542 } 543 544 static void 545 umodem_dtr(struct umodem_softc *sc, int onoff) 546 { 547 DPRINTF(("umodem_dtr: onoff=%d\n", onoff)); 548 549 if (sc->sc_dtr == onoff) 550 return; 551 sc->sc_dtr = onoff; 552 553 umodem_set_line_state(sc); 554 } 555 556 static void 557 umodem_rts(struct umodem_softc *sc, int onoff) 558 { 559 DPRINTF(("umodem_rts: onoff=%d\n", onoff)); 560 561 if (sc->sc_rts == onoff) 562 return; 563 sc->sc_rts = onoff; 564 565 umodem_set_line_state(sc); 566 } 567 568 static void 569 umodem_set_line_state(struct umodem_softc *sc) 570 { 571 usb_device_request_t req; 572 int ls; 573 574 ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) | 575 (sc->sc_rts ? UCDC_LINE_RTS : 0); 576 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 577 req.bRequest = UCDC_SET_CONTROL_LINE_STATE; 578 USETW(req.wValue, ls); 579 USETW(req.wIndex, sc->sc_ctl_iface_no); 580 USETW(req.wLength, 0); 581 582 (void)usbd_do_request(sc->sc_udev, &req, 0); 583 584 } 585 586 static void 587 umodem_break(struct umodem_softc *sc, int onoff) 588 { 589 usb_device_request_t req; 590 591 DPRINTF(("umodem_break: onoff=%d\n", onoff)); 592 593 if (!(sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK)) 594 return; 595 596 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 597 req.bRequest = UCDC_SEND_BREAK; 598 USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF); 599 USETW(req.wIndex, sc->sc_ctl_iface_no); 600 USETW(req.wLength, 0); 601 602 (void)usbd_do_request(sc->sc_udev, &req, 0); 603 } 604 605 void 606 umodem_set(void *addr, int portno, int reg, int onoff) 607 { 608 struct umodem_softc *sc = addr; 609 610 mutex_enter(&sc->sc_lock); 611 if (sc->sc_dying) 612 return; 613 mutex_exit(&sc->sc_lock); 614 615 switch (reg) { 616 case UCOM_SET_DTR: 617 umodem_dtr(sc, onoff); 618 break; 619 case UCOM_SET_RTS: 620 umodem_rts(sc, onoff); 621 break; 622 case UCOM_SET_BREAK: 623 umodem_break(sc, onoff); 624 break; 625 default: 626 break; 627 } 628 } 629 630 static usbd_status 631 umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state) 632 { 633 usb_device_request_t req; 634 usbd_status err; 635 636 DPRINTF(("umodem_set_line_coding: rate=%d fmt=%d parity=%d bits=%d\n", 637 UGETDW(state->dwDTERate), state->bCharFormat, 638 state->bParityType, state->bDataBits)); 639 640 if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) { 641 DPRINTF(("umodem_set_line_coding: already set\n")); 642 return USBD_NORMAL_COMPLETION; 643 } 644 645 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 646 req.bRequest = UCDC_SET_LINE_CODING; 647 USETW(req.wValue, 0); 648 USETW(req.wIndex, sc->sc_ctl_iface_no); 649 USETW(req.wLength, UCDC_LINE_STATE_LENGTH); 650 651 err = usbd_do_request(sc->sc_udev, &req, state); 652 if (err) { 653 DPRINTF(("umodem_set_line_coding: failed, err=%s\n", 654 usbd_errstr(err))); 655 return err; 656 } 657 658 sc->sc_line_state = *state; 659 660 return USBD_NORMAL_COMPLETION; 661 } 662 663 static usbd_status 664 umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state) 665 { 666 usb_device_request_t req; 667 usbd_status err; 668 usb_cdc_abstract_state_t ast; 669 670 DPRINTF(("umodem_set_comm_feature: feature=%d state=%d\n", feature, 671 state)); 672 673 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 674 req.bRequest = UCDC_SET_COMM_FEATURE; 675 USETW(req.wValue, feature); 676 USETW(req.wIndex, sc->sc_ctl_iface_no); 677 USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH); 678 USETW(ast.wState, state); 679 680 err = usbd_do_request(sc->sc_udev, &req, &ast); 681 if (err) { 682 DPRINTF(("umodem_set_comm_feature: feature=%d, err=%s\n", 683 feature, usbd_errstr(err))); 684 return err; 685 } 686 687 return USBD_NORMAL_COMPLETION; 688 } 689 690 int 691 umodem_common_activate(struct umodem_softc *sc, enum devact act) 692 { 693 switch (act) { 694 case DVACT_DEACTIVATE: 695 mutex_enter(&sc->sc_lock); 696 sc->sc_dying = true; 697 mutex_exit(&sc->sc_lock); 698 return 0; 699 default: 700 return EOPNOTSUPP; 701 } 702 } 703 704 void 705 umodem_common_childdet(struct umodem_softc *sc, device_t child) 706 { 707 KASSERT(sc->sc_subdev == child); 708 sc->sc_subdev = NULL; 709 } 710 711 int 712 umodem_common_detach(struct umodem_softc *sc, int flags) 713 { 714 int rv = 0; 715 716 DPRINTF(("umodem_common_detach: sc=%p flags=%d\n", sc, flags)); 717 718 mutex_enter(&sc->sc_lock); 719 sc->sc_dying = true; 720 721 sc->sc_refcnt--; 722 while (sc->sc_refcnt > 0) { 723 if (cv_timedwait(&sc->sc_detach_cv, &sc->sc_lock, hz * 60)) 724 aprint_error_dev(sc->sc_dev, ": didn't detach\n"); 725 } 726 mutex_exit(&sc->sc_lock); 727 728 if (sc->sc_subdev != NULL) 729 rv = config_detach(sc->sc_subdev, flags); 730 731 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 732 733 mutex_destroy(&sc->sc_lock); 734 cv_destroy(&sc->sc_detach_cv); 735 736 return rv; 737 } 738
Indexes created Thu Sep 25 16:09:42 GMT 2025