u3g.c revision 1.38
1 /* $NetBSD: u3g.c,v 1.38 2020/01/07 06:42:26 maxv Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* 32 * Copyright (c) 2008 AnyWi Technologies 33 * Author: Andrea Guzzo <aguzzo (at) anywi.com> 34 * * based on uark.c 1.1 2006/08/14 08:30:22 jsg * 35 * * parts from ubsa.c 183348 2008-09-25 12:00:56Z phk * 36 * 37 * Permission to use, copy, modify, and distribute this software for any 38 * purpose with or without fee is hereby granted, provided that the above 39 * copyright notice and this permission notice appear in all copies. 40 * 41 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 42 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 43 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 44 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 45 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 46 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 47 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 48 * 49 * $FreeBSD$ 50 */ 51 52 #include <sys/cdefs.h> 53 __KERNEL_RCSID(0, "$NetBSD: u3g.c,v 1.38 2020/01/07 06:42:26 maxv Exp $"); 54 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/kernel.h> 58 #include <sys/kmem.h> 59 #include <sys/bus.h> 60 #include <sys/conf.h> 61 #include <sys/tty.h> 62 63 #include <dev/usb/usb.h> 64 #include <dev/usb/usbdi.h> 65 #include <dev/usb/usbdivar.h> 66 #include <dev/usb/usbdi_util.h> 67 68 #include <dev/usb/ucomvar.h> 69 70 #include "usbdevs.h" 71 72 /* 73 * We read/write data from/to the device in 4KB chunks to maximise 74 * performance. 75 */ 76 #define U3G_BUFF_SIZE 4096 77 78 /* 79 * Some 3G devices (the Huawei E160/E220 springs to mind here) buffer up 80 * data internally even when the USB pipes are closed. So on first open, 81 * we can receive a large chunk of stale data. 82 * 83 * This causes a real problem because the default TTYDEF_LFLAG (applied 84 * on first open) has the ECHO flag set, resulting in all the stale data 85 * being echoed straight back to the device by the tty(4) layer. Some 86 * devices (again, the Huawei E160/E220 for example) react to this spew 87 * by going catatonic. 88 * 89 * All this happens before the application gets a chance to disable ECHO. 90 * 91 * We work around this by ignoring all data received from the device for 92 * a period of two seconds, or until the application starts sending data - 93 * whichever comes first. 94 */ 95 #define U3G_PURGE_SECS 2 96 97 /* 98 * Define bits for the virtual modem control pins. 99 * The input pin states are reported via the interrupt pipe on some devices. 100 */ 101 #define U3G_OUTPIN_DTR (1u << 0) 102 #define U3G_OUTPIN_RTS (1u << 1) 103 #define U3G_INPIN_DCD (1u << 0) 104 #define U3G_INPIN_DSR (1u << 1) 105 #define U3G_INPIN_RI (1u << 3) 106 107 /* 108 * USB request to set the output pin status 109 */ 110 #define U3G_SET_PIN 0x22 111 112 struct u3g_softc { 113 device_t sc_dev; 114 struct usbd_device * sc_udev; 115 bool sc_dying; /* We're going away */ 116 int sc_ifaceno; /* Device interface number */ 117 118 struct u3g_com { 119 device_t c_dev; /* Child ucom(4) handle */ 120 121 bool c_open; /* Device is in use */ 122 bool c_purging; /* Purging stale data */ 123 struct timeval c_purge_start; /* Control duration of purge */ 124 125 u_char c_msr; /* Emulated 'msr' */ 126 uint16_t c_outpins; /* Output pin state */ 127 } sc_com[10]; 128 size_t sc_ncom; 129 130 struct usbd_pipe * sc_intr_pipe; /* Interrupt pipe */ 131 u_char *sc_intr_buff; /* Interrupt buffer */ 132 size_t sc_intr_size; /* buffer size */ 133 }; 134 135 /* 136 * The device driver has two personalities. The first uses the 'usbdevif' 137 * interface attribute so that a match will claim the entire USB device 138 * for itself. This is used for when a device needs to be mode-switched 139 * and ensures any other interfaces present cannot be claimed by other 140 * drivers while the mode-switch is in progress. This is implemented by 141 * the umodeswitch driver. 142 * 143 * The second personality uses the 'usbifif' interface attribute so that 144 * it can claim the 3G modem interfaces for itself, leaving others (such 145 * as the mass storage interfaces on some devices) for other drivers. 146 */ 147 148 static int u3g_match(device_t, cfdata_t, void *); 149 static void u3g_attach(device_t, device_t, void *); 150 static int u3g_detach(device_t, int); 151 static void u3g_childdet(device_t, device_t); 152 153 CFATTACH_DECL2_NEW(u3g, sizeof(struct u3g_softc), u3g_match, 154 u3g_attach, u3g_detach, NULL, NULL, u3g_childdet); 155 156 157 static void u3g_intr(struct usbd_xfer *, void *, usbd_status); 158 static void u3g_get_status(void *, int, u_char *, u_char *); 159 static void u3g_set(void *, int, int, int); 160 static int u3g_open(void *, int); 161 static void u3g_close(void *, int); 162 static void u3g_read(void *, int, u_char **, uint32_t *); 163 static void u3g_write(void *, int, u_char *, u_char *, uint32_t *); 164 165 static const struct ucom_methods u3g_methods = { 166 .ucom_get_status = u3g_get_status, 167 .ucom_set = u3g_set, 168 .ucom_open = u3g_open, 169 .ucom_close = u3g_close, 170 .ucom_read = u3g_read, 171 .ucom_write = u3g_write, 172 }; 173 174 /* 175 * Allegedly supported devices 176 */ 177 static const struct usb_devno u3g_devs[] = { 178 { USB_VENDOR_DELL, USB_PRODUCT_DELL_W5500 }, 179 { USB_VENDOR_HP, USB_PRODUCT_HP_UN2430 }, 180 /* OEM: Huawei */ 181 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_E1750 }, 182 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_E1820 }, 183 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_E220 }, 184 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_EM770W }, 185 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_K3765 }, 186 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_MOBILE }, 187 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_E171 }, 188 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_E353 }, 189 /* LG Electronics */ 190 { USB_VENDOR_LG, USB_PRODUCT_LG_NTT_DOCOMO_L02C_MODEM }, 191 /* OEM: Merlin */ 192 { USB_VENDOR_MERLIN, USB_PRODUCT_MERLIN_V620 }, 193 /* OEM: Novatel */ 194 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_ES620 }, 195 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_EU8X0D }, 196 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_MC950D }, 197 #if 0 198 /* These are matched in u3ginit_match() */ 199 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_MC950D_DRIVER }, 200 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U760_DRIVER }, 201 #endif 202 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_MERLINU740 }, 203 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_MERLINV620 }, 204 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_S720 }, 205 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U720 }, 206 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U727 }, 207 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U740_2 }, 208 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U760 }, 209 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U870 }, 210 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_V740 }, 211 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_X950D }, 212 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_XU870 }, 213 /* OEM: Option N.V. */ 214 { USB_VENDOR_OPTIONNV, USB_PRODUCT_OPTIONNV_QUADPLUSUMTS }, 215 { USB_VENDOR_OPTIONNV, USB_PRODUCT_OPTIONNV_HSDPA }, 216 { USB_VENDOR_OPTIONNV, USB_PRODUCT_OPTIONNV_GTMAXHSUPA }, 217 218 /* OEM: Sierra Wireless: */ 219 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC595U }, 220 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC597E }, 221 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC875U }, 222 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC880 }, 223 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC880E }, 224 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC880U }, 225 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC881 }, 226 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC881E }, 227 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC881U }, 228 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AIRCARD580 }, 229 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AIRCARD595 }, 230 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AIRCARD875 }, 231 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_C597 }, 232 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_EM5625 }, 233 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC5720 }, 234 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC5720_2 }, 235 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC5725 }, 236 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8755 }, 237 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8755_2 }, 238 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8755_3 }, 239 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8765 }, 240 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8775_2 }, 241 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8780 }, 242 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8781 }, 243 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MINI5725 }, 244 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_USB305 }, 245 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_250U }, 246 /* Toshiba */ 247 { USB_VENDOR_TOSHIBA, USB_PRODUCT_TOSHIBA_HSDPA_MODEM_EU870DT1 }, 248 249 /* ZTE */ 250 { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_MF622 }, 251 { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_MF626 }, 252 { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_MF628 }, 253 { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_MF820D }, 254 255 /* 4G Systems */ 256 { USB_VENDOR_LONGCHEER, USB_PRODUCT_LONGCHEER_XSSTICK_P14 }, 257 { USB_VENDOR_LONGCHEER, USB_PRODUCT_LONGCHEER_XSSTICK_W14 }, 258 }; 259 260 /* 261 * Second personality: 262 * 263 * Claim only those interfaces required for 3G modem operation. 264 */ 265 266 static int 267 u3g_match(device_t parent, cfdata_t match, void *aux) 268 { 269 struct usbif_attach_arg *uiaa = aux; 270 struct usbd_interface *iface; 271 usb_interface_descriptor_t *id; 272 usbd_status error; 273 274 if (!usb_lookup(u3g_devs, uiaa->uiaa_vendor, uiaa->uiaa_product)) 275 return UMATCH_NONE; 276 277 error = usbd_device2interface_handle(uiaa->uiaa_device, 278 uiaa->uiaa_ifaceno, &iface); 279 if (error) { 280 printf("u3g_match: failed to get interface, err=%s\n", 281 usbd_errstr(error)); 282 return UMATCH_NONE; 283 } 284 285 id = usbd_get_interface_descriptor(iface); 286 if (id == NULL) { 287 printf("u3g_match: failed to get interface descriptor\n"); 288 return UMATCH_NONE; 289 } 290 291 /* 292 * Huawei modems use the vendor-specific class for all interfaces, 293 * both tty and CDC NCM, which we should avoid attaching to. 294 */ 295 if (uiaa->uiaa_vendor == USB_VENDOR_HUAWEI && 296 id->bInterfaceSubClass == 2 && 297 (id->bInterfaceProtocol & 0xf) == 6) /* 0x16, 0x46, 0x76 */ 298 return UMATCH_NONE; 299 300 /* 301 * 3G modems generally report vendor-specific class 302 * 303 * XXX: this may be too generalised. 304 */ 305 return id->bInterfaceClass == UICLASS_VENDOR ? 306 UMATCH_VENDOR_PRODUCT : UMATCH_NONE; 307 } 308 309 static void 310 u3g_attach(device_t parent, device_t self, void *aux) 311 { 312 struct u3g_softc *sc = device_private(self); 313 struct usbif_attach_arg *uiaa = aux; 314 struct usbd_device *dev = uiaa->uiaa_device; 315 struct usbd_interface *iface; 316 usb_interface_descriptor_t *id; 317 usb_endpoint_descriptor_t *ed; 318 struct ucom_attach_args ucaa; 319 usbd_status error; 320 int n, intr_address, intr_size; 321 322 aprint_naive("\n"); 323 aprint_normal("\n"); 324 325 sc->sc_dev = self; 326 sc->sc_dying = false; 327 sc->sc_udev = dev; 328 329 error = usbd_device2interface_handle(dev, uiaa->uiaa_ifaceno, &iface); 330 if (error) { 331 aprint_error_dev(self, "failed to get interface, err=%s\n", 332 usbd_errstr(error)); 333 return; 334 } 335 336 id = usbd_get_interface_descriptor(iface); 337 338 ucaa.ucaa_info = "3G Modem"; 339 ucaa.ucaa_ibufsize = U3G_BUFF_SIZE; 340 ucaa.ucaa_obufsize = U3G_BUFF_SIZE; 341 ucaa.ucaa_ibufsizepad = U3G_BUFF_SIZE; 342 ucaa.ucaa_opkthdrlen = 0; 343 ucaa.ucaa_device = dev; 344 ucaa.ucaa_iface = iface; 345 ucaa.ucaa_methods = &u3g_methods; 346 ucaa.ucaa_arg = sc; 347 ucaa.ucaa_portno = -1; 348 ucaa.ucaa_bulkin = ucaa.ucaa_bulkout = -1; 349 350 sc->sc_ifaceno = uiaa->uiaa_ifaceno; 351 intr_address = -1; 352 intr_size = 0; 353 354 for (n = 0; n < id->bNumEndpoints; n++) { 355 ed = usbd_interface2endpoint_descriptor(iface, n); 356 if (ed == NULL) { 357 aprint_error_dev(self, "no endpoint descriptor " 358 "for %d (interface: %d)\n", n, sc->sc_ifaceno); 359 sc->sc_dying = true; 360 return; 361 } 362 363 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 364 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 365 intr_address = ed->bEndpointAddress; 366 intr_size = UGETW(ed->wMaxPacketSize); 367 } else 368 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 369 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 370 ucaa.ucaa_bulkin = ed->bEndpointAddress; 371 } else 372 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 373 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 374 ucaa.ucaa_bulkout = ed->bEndpointAddress; 375 } 376 if (ucaa.ucaa_bulkin != -1 && ucaa.ucaa_bulkout != -1) { 377 struct u3g_com *com; 378 if (sc->sc_ncom == __arraycount(sc->sc_com)) { 379 aprint_error_dev(self, "Need to configure " 380 "more than %zu ttys", sc->sc_ncom); 381 continue; 382 } 383 ucaa.ucaa_portno = sc->sc_ncom++; 384 com = &sc->sc_com[ucaa.ucaa_portno]; 385 com->c_outpins = 0; 386 com->c_msr = UMSR_DSR | UMSR_CTS | UMSR_DCD; 387 com->c_open = false; 388 com->c_purging = false; 389 com->c_dev = config_found_sm_loc(self, "ucombus", 390 NULL, &ucaa, ucomprint, ucomsubmatch); 391 ucaa.ucaa_bulkin = -1; 392 ucaa.ucaa_bulkout = -1; 393 } 394 } 395 396 if (sc->sc_ncom == 0) { 397 aprint_error_dev(self, "Missing bulk in/out for interface %d\n", 398 sc->sc_ifaceno); 399 sc->sc_dying = true; 400 return; 401 } 402 403 /* 404 * If the interface has an interrupt pipe, open it immediately so 405 * that we can track input pin state changes regardless of whether 406 * the tty(4) device is open or not. 407 */ 408 if (intr_address != -1) { 409 sc->sc_intr_size = intr_size; 410 sc->sc_intr_buff = kmem_alloc(intr_size, KM_SLEEP); 411 error = usbd_open_pipe_intr(iface, intr_address, 412 USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc, sc->sc_intr_buff, 413 intr_size, u3g_intr, 100); 414 if (error) { 415 aprint_error_dev(self, "cannot open interrupt pipe " 416 "(addr %d)\n", intr_address); 417 return; 418 } 419 } else { 420 sc->sc_intr_pipe = NULL; 421 sc->sc_intr_buff = NULL; 422 } 423 424 if (!pmf_device_register(self, NULL, NULL)) 425 aprint_error_dev(self, "couldn't establish power handler\n"); 426 } 427 428 static int 429 u3g_detach(device_t self, int flags) 430 { 431 struct u3g_softc *sc = device_private(self); 432 int rv = 0; 433 434 sc->sc_dying = true; 435 436 if (sc->sc_intr_pipe != NULL) { 437 usbd_abort_pipe(sc->sc_intr_pipe); 438 usbd_close_pipe(sc->sc_intr_pipe); 439 sc->sc_intr_pipe = NULL; 440 } 441 if (sc->sc_intr_buff != NULL) { 442 kmem_free(sc->sc_intr_buff, sc->sc_intr_size); 443 sc->sc_intr_buff = NULL; 444 } 445 446 for (size_t i = 0; i < sc->sc_ncom; i++) 447 if (sc->sc_com[i].c_dev != NULL) { 448 int port_rv; 449 450 port_rv = config_detach(sc->sc_com[i].c_dev, flags); 451 if (port_rv != 0) { 452 aprint_verbose_dev(self, "Can't deallocate " 453 "port (%d)", port_rv); 454 } 455 rv |= port_rv; 456 sc->sc_com[i].c_dev = NULL; 457 } 458 459 pmf_device_deregister(self); 460 461 return rv; 462 } 463 464 static void 465 u3g_childdet(device_t self, device_t child) 466 { 467 struct u3g_softc *sc = device_private(self); 468 469 for (size_t i = 0; i < sc->sc_ncom; i++) 470 if (sc->sc_com[i].c_dev == child) 471 sc->sc_com[i].c_dev = NULL; 472 } 473 474 static void 475 u3g_intr(struct usbd_xfer *xfer, void *priv, usbd_status status) 476 { 477 struct u3g_softc *sc = (struct u3g_softc *)priv; 478 u_char *buf; 479 int portno = 0; /* XXX */ 480 struct u3g_com *com = &sc->sc_com[portno]; 481 482 if (sc->sc_dying) 483 return; 484 485 if (status != USBD_NORMAL_COMPLETION) { 486 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 487 return; 488 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 489 return; 490 } 491 492 buf = sc->sc_intr_buff; 493 if (buf[0] == 0xa1 && buf[1] == 0x20) { 494 u_char msr; 495 496 msr = com->c_msr & ~(UMSR_DCD | UMSR_DSR | UMSR_RI); 497 498 if (buf[8] & U3G_INPIN_DCD) 499 msr |= UMSR_DCD; 500 501 if (buf[8] & U3G_INPIN_DSR) 502 msr |= UMSR_DSR; 503 504 if (buf[8] & U3G_INPIN_RI) 505 msr |= UMSR_RI; 506 507 if (msr != com->c_msr) { 508 com->c_msr = msr; 509 if (com->c_open) 510 ucom_status_change(device_private(com->c_dev)); 511 } 512 } 513 } 514 515 /*ARGSUSED*/ 516 static void 517 u3g_get_status(void *arg, int portno, u_char *lsr, u_char *msr) 518 { 519 struct u3g_softc *sc = arg; 520 521 *lsr = 0; /* LSR isn't supported */ 522 *msr = sc->sc_com[portno].c_msr; 523 } 524 525 /*ARGSUSED*/ 526 static void 527 u3g_set(void *arg, int portno, int reg, int onoff) 528 { 529 struct u3g_softc *sc = arg; 530 usb_device_request_t req; 531 uint16_t mask, new_state; 532 usbd_status err; 533 struct u3g_com *com = &sc->sc_com[portno]; 534 535 if (sc->sc_dying) 536 return; 537 538 switch (reg) { 539 case UCOM_SET_DTR: 540 mask = U3G_OUTPIN_DTR; 541 break; 542 case UCOM_SET_RTS: 543 mask = U3G_OUTPIN_RTS; 544 break; 545 default: 546 return; 547 } 548 549 new_state = com->c_outpins & ~mask; 550 if (onoff) 551 new_state |= mask; 552 553 if (new_state == com->c_outpins) 554 return; 555 556 com->c_outpins = new_state; 557 558 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 559 req.bRequest = U3G_SET_PIN; 560 USETW(req.wValue, new_state); 561 USETW(req.wIndex, sc->sc_ifaceno); 562 USETW(req.wLength, 0); 563 564 err = usbd_do_request(sc->sc_udev, &req, 0); 565 if (err == USBD_STALLED) 566 usbd_clear_endpoint_stall(sc->sc_udev->ud_pipe0); 567 } 568 569 /*ARGSUSED*/ 570 static int 571 u3g_open(void *arg, int portno) 572 { 573 struct u3g_softc *sc = arg; 574 usb_device_request_t req; 575 usb_endpoint_descriptor_t *ed; 576 usb_interface_descriptor_t *id; 577 struct usbd_interface *ih; 578 usbd_status err; 579 struct u3g_com *com = &sc->sc_com[portno]; 580 int i, nin; 581 582 if (sc->sc_dying) 583 return EIO; 584 585 err = usbd_device2interface_handle(sc->sc_udev, sc->sc_ifaceno, &ih); 586 if (err) 587 return EIO; 588 589 id = usbd_get_interface_descriptor(ih); 590 591 for (nin = i = 0; i < id->bNumEndpoints; i++) { 592 ed = usbd_interface2endpoint_descriptor(ih, i); 593 if (ed == NULL) 594 return EIO; 595 596 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 597 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK && 598 nin++ == portno) { 599 /* Issue ENDPOINT_HALT request */ 600 req.bmRequestType = UT_WRITE_ENDPOINT; 601 req.bRequest = UR_CLEAR_FEATURE; 602 USETW(req.wValue, UF_ENDPOINT_HALT); 603 USETW(req.wIndex, ed->bEndpointAddress); 604 USETW(req.wLength, 0); 605 err = usbd_do_request(sc->sc_udev, &req, 0); 606 if (err) 607 return EIO; 608 } 609 } 610 611 com->c_open = true; 612 com->c_purging = true; 613 getmicrotime(&com->c_purge_start); 614 615 return 0; 616 } 617 618 /*ARGSUSED*/ 619 static void 620 u3g_close(void *arg, int portno) 621 { 622 struct u3g_softc *sc = arg; 623 struct u3g_com *com = &sc->sc_com[portno]; 624 625 com->c_open = false; 626 } 627 628 /*ARGSUSED*/ 629 static void 630 u3g_read(void *arg, int portno, u_char **cpp, uint32_t *ccp) 631 { 632 struct u3g_softc *sc = arg; 633 struct timeval curr_tv, diff_tv; 634 struct u3g_com *com = &sc->sc_com[portno]; 635 636 /* 637 * If we're not purging input data following first open, do nothing. 638 */ 639 if (com->c_purging == false) 640 return; 641 642 /* 643 * Otherwise check if the purge timeout has expired 644 */ 645 getmicrotime(&curr_tv); 646 timersub(&curr_tv, &com->c_purge_start, &diff_tv); 647 648 if (diff_tv.tv_sec >= U3G_PURGE_SECS) { 649 /* Timeout expired. */ 650 com->c_purging = false; 651 } else { 652 /* Still purging. Adjust the caller's byte count. */ 653 *ccp = 0; 654 } 655 } 656 657 /*ARGSUSED*/ 658 static void 659 u3g_write(void *arg, int portno, u_char *to, u_char *from, uint32_t *count) 660 { 661 struct u3g_softc *sc = arg; 662 struct u3g_com *com = &sc->sc_com[portno]; 663 664 /* 665 * Stop purging as soon as the first data is written to the device. 666 */ 667 com->c_purging = false; 668 memcpy(to, from, *count); 669 } 670
Indexes created Wed Oct 15 03:09:54 GMT 2025