1 /* $NetBSD: u3g.c,v 1.44 2023/02/13 14:05:26 manu 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@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 1.44 2023/02/13 14:05:26 manu 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 struct usbd_interface *sc_iface; /* Device interface */ 118 119 struct u3g_com { 120 device_t c_dev; /* Child ucom(4) handle */ 121 122 bool c_open; /* Device is in use */ 123 bool c_purging; /* Purging stale data */ 124 struct timeval c_purge_start; /* Control duration of purge */ 125 126 u_char c_msr; /* Emulated 'msr' */ 127 uint16_t c_outpins; /* Output pin state */ 128 } sc_com[10]; 129 size_t sc_ncom; 130 131 struct usbd_pipe * sc_intr_pipe; /* Interrupt pipe */ 132 u_char *sc_intr_buff; /* Interrupt buffer */ 133 size_t sc_intr_size; /* buffer size */ 134 }; 135 136 /* 137 * The device driver has two personalities. The first uses the 'usbdevif' 138 * interface attribute so that a match will claim the entire USB device 139 * for itself. This is used for when a device needs to be mode-switched 140 * and ensures any other interfaces present cannot be claimed by other 141 * drivers while the mode-switch is in progress. This is implemented by 142 * the umodeswitch driver. 143 * 144 * The second personality uses the 'usbifif' interface attribute so that 145 * it can claim the 3G modem interfaces for itself, leaving others (such 146 * as the mass storage interfaces on some devices) for other drivers. 147 */ 148 149 static int u3g_match(device_t, cfdata_t, void *); 150 static void u3g_attach(device_t, device_t, void *); 151 static int u3g_detach(device_t, int); 152 static void u3g_childdet(device_t, device_t); 153 154 CFATTACH_DECL2_NEW(u3g, sizeof(struct u3g_softc), u3g_match, 155 u3g_attach, u3g_detach, NULL, NULL, u3g_childdet); 156 157 158 static void u3g_intr(struct usbd_xfer *, void *, usbd_status); 159 static void u3g_get_status(void *, int, u_char *, u_char *); 160 static void u3g_set(void *, int, int, int); 161 static int u3g_open(void *, int); 162 static void u3g_close(void *, int); 163 static void u3g_read(void *, int, u_char **, uint32_t *); 164 static void u3g_write(void *, int, u_char *, u_char *, uint32_t *); 165 166 static const struct ucom_methods u3g_methods = { 167 .ucom_get_status = u3g_get_status, 168 .ucom_set = u3g_set, 169 .ucom_open = u3g_open, 170 .ucom_close = u3g_close, 171 .ucom_read = u3g_read, 172 .ucom_write = u3g_write, 173 }; 174 175 /* 176 * Allegedly supported devices 177 */ 178 static const struct usb_devno u3g_devs[] = { 179 { USB_VENDOR_DELL, USB_PRODUCT_DELL_W5500 }, 180 { USB_VENDOR_HP, USB_PRODUCT_HP_UN2430 }, 181 /* OEM: Huawei */ 182 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_E1750 }, 183 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_E1820 }, 184 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_E220 }, 185 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_EM770W }, 186 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_K3765 }, 187 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_MOBILE }, 188 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_E171 }, 189 { USB_VENDOR_HUAWEI, USB_PRODUCT_HUAWEI_E353 }, 190 /* LG Electronics */ 191 { USB_VENDOR_LG, USB_PRODUCT_LG_NTT_DOCOMO_L02C_MODEM }, 192 /* OEM: Merlin */ 193 { USB_VENDOR_MERLIN, USB_PRODUCT_MERLIN_V620 }, 194 /* OEM: Novatel */ 195 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_ES620 }, 196 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_EU8X0D }, 197 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_MC950D }, 198 #if 0 199 /* These are matched in u3ginit_match() */ 200 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_MC950D_DRIVER }, 201 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U760_DRIVER }, 202 #endif 203 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_MERLINU740 }, 204 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_MERLINV620 }, 205 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_S720 }, 206 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U720 }, 207 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U727 }, 208 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U740_2 }, 209 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U760 }, 210 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_U870 }, 211 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_V740 }, 212 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_X950D }, 213 { USB_VENDOR_NOVATEL2, USB_PRODUCT_NOVATEL2_XU870 }, 214 /* OEM: Option N.V. */ 215 { USB_VENDOR_OPTIONNV, USB_PRODUCT_OPTIONNV_QUADPLUSUMTS }, 216 { USB_VENDOR_OPTIONNV, USB_PRODUCT_OPTIONNV_HSDPA }, 217 { USB_VENDOR_OPTIONNV, USB_PRODUCT_OPTIONNV_GTMAXHSUPA }, 218 219 /* OEM: Sierra Wireless: */ 220 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC595U }, 221 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC597E }, 222 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC875U }, 223 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC880 }, 224 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC880E }, 225 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC880U }, 226 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC881 }, 227 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC881E }, 228 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AC881U }, 229 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AIRCARD580 }, 230 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AIRCARD595 }, 231 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_AIRCARD875 }, 232 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_C597 }, 233 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_EM5625 }, 234 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC5720 }, 235 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC5720_2 }, 236 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC5725 }, 237 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8755 }, 238 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8755_2 }, 239 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8755_3 }, 240 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8765 }, 241 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8775_2 }, 242 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8780 }, 243 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MC8781 }, 244 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_MINI5725 }, 245 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_USB305 }, 246 { USB_VENDOR_SIERRA, USB_PRODUCT_SIERRA_250U }, 247 /* Toshiba */ 248 { USB_VENDOR_TOSHIBA, USB_PRODUCT_TOSHIBA_HSDPA_MODEM_EU870DT1 }, 249 250 /* ZTE */ 251 { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_MF622 }, 252 { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_MF626 }, 253 { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_MF628 }, 254 { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_MF820D }, 255 { USB_VENDOR_ZTE, USB_PRODUCT_ZTE_MF112 }, 256 257 /* 4G Systems */ 258 { USB_VENDOR_LONGCHEER, USB_PRODUCT_LONGCHEER_XSSTICK_P14 }, 259 { USB_VENDOR_LONGCHEER, USB_PRODUCT_LONGCHEER_XSSTICK_W14 }, 260 261 /* DLink */ 262 { USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DWM157 }, 263 { USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DWM157E }, 264 { USB_VENDOR_DLINK, USB_PRODUCT_DLINK_DWM222 }, 265 }; 266 267 /* 268 * Second personality: 269 * 270 * Claim only those interfaces required for 3G modem operation. 271 */ 272 273 static int 274 u3g_match(device_t parent, cfdata_t match, void *aux) 275 { 276 struct usbif_attach_arg *uiaa = aux; 277 struct usbd_interface *iface = uiaa->uiaa_iface; 278 usb_interface_descriptor_t *id; 279 280 if (!usb_lookup(u3g_devs, uiaa->uiaa_vendor, uiaa->uiaa_product)) 281 return UMATCH_NONE; 282 283 id = usbd_get_interface_descriptor(iface); 284 if (id == NULL) { 285 printf("u3g_match: failed to get interface descriptor\n"); 286 return UMATCH_NONE; 287 } 288 289 /* 290 * Huawei modems use the vendor-specific class for all interfaces, 291 * both tty and CDC NCM, which we should avoid attaching to. 292 */ 293 if (uiaa->uiaa_vendor == USB_VENDOR_HUAWEI && 294 id->bInterfaceSubClass == 2 && 295 (id->bInterfaceProtocol & 0xf) == 6) /* 0x16, 0x46, 0x76 */ 296 return UMATCH_NONE; 297 298 /* 299 * Sierra Wireless modems use the vendor-specific class also for 300 * Direct IP or QMI interfaces, which we should avoid attaching to. 301 */ 302 if (uiaa->uiaa_vendor == USB_VENDOR_SIERRA && 303 id->bInterfaceClass == UICLASS_VENDOR && 304 uiaa->uiaa_product == USB_PRODUCT_SIERRA_USB305 && 305 uiaa->uiaa_ifaceno >= 7) 306 return UMATCH_NONE; 307 308 /* 309 * 3G modems generally report vendor-specific class 310 * 311 * XXX: this may be too generalised. 312 */ 313 return id->bInterfaceClass == UICLASS_VENDOR ? 314 UMATCH_VENDOR_PRODUCT : UMATCH_NONE; 315 } 316 317 static void 318 u3g_attach(device_t parent, device_t self, void *aux) 319 { 320 struct u3g_softc *sc = device_private(self); 321 struct usbif_attach_arg *uiaa = aux; 322 struct usbd_device *dev = uiaa->uiaa_device; 323 struct usbd_interface *iface = uiaa->uiaa_iface; 324 usb_interface_descriptor_t *id; 325 usb_endpoint_descriptor_t *ed; 326 struct ucom_attach_args ucaa; 327 usbd_status error; 328 int n, intr_address, intr_size; 329 330 aprint_naive("\n"); 331 aprint_normal("\n"); 332 333 sc->sc_dev = self; 334 sc->sc_dying = false; 335 sc->sc_udev = dev; 336 337 id = usbd_get_interface_descriptor(iface); 338 339 ucaa.ucaa_info = "3G Modem"; 340 ucaa.ucaa_ibufsize = U3G_BUFF_SIZE; 341 ucaa.ucaa_obufsize = U3G_BUFF_SIZE; 342 ucaa.ucaa_ibufsizepad = U3G_BUFF_SIZE; 343 ucaa.ucaa_opkthdrlen = 0; 344 ucaa.ucaa_device = dev; 345 ucaa.ucaa_iface = iface; 346 ucaa.ucaa_methods = &u3g_methods; 347 ucaa.ucaa_arg = sc; 348 ucaa.ucaa_portno = -1; 349 ucaa.ucaa_bulkin = ucaa.ucaa_bulkout = -1; 350 351 sc->sc_ifaceno = uiaa->uiaa_ifaceno; 352 sc->sc_iface = uiaa->uiaa_iface; 353 intr_address = -1; 354 intr_size = 0; 355 356 for (n = 0; n < id->bNumEndpoints; n++) { 357 ed = usbd_interface2endpoint_descriptor(iface, n); 358 if (ed == NULL) { 359 aprint_error_dev(self, "no endpoint descriptor " 360 "for %d (interface: %d)\n", n, sc->sc_ifaceno); 361 sc->sc_dying = true; 362 return; 363 } 364 365 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 366 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 367 intr_address = ed->bEndpointAddress; 368 intr_size = UGETW(ed->wMaxPacketSize); 369 } else 370 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 371 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 372 ucaa.ucaa_bulkin = ed->bEndpointAddress; 373 } else 374 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 375 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 376 ucaa.ucaa_bulkout = ed->bEndpointAddress; 377 } 378 if (ucaa.ucaa_bulkin != -1 && ucaa.ucaa_bulkout != -1) { 379 struct u3g_com *com; 380 if (sc->sc_ncom == __arraycount(sc->sc_com)) { 381 aprint_error_dev(self, "Need to configure " 382 "more than %zu ttys", sc->sc_ncom); 383 continue; 384 } 385 ucaa.ucaa_portno = sc->sc_ncom++; 386 com = &sc->sc_com[ucaa.ucaa_portno]; 387 com->c_outpins = 0; 388 com->c_msr = UMSR_DSR | UMSR_CTS | UMSR_DCD; 389 com->c_open = false; 390 com->c_purging = false; 391 com->c_dev = config_found(self, &ucaa, ucomprint, 392 CFARGS(.submatch = ucomsubmatch)); 393 ucaa.ucaa_bulkin = -1; 394 ucaa.ucaa_bulkout = -1; 395 } 396 } 397 398 if (sc->sc_ncom == 0) { 399 aprint_error_dev(self, "Missing bulk in/out for interface %d\n", 400 sc->sc_ifaceno); 401 sc->sc_dying = true; 402 return; 403 } 404 405 /* 406 * If the interface has an interrupt pipe, open it immediately so 407 * that we can track input pin state changes regardless of whether 408 * the tty(4) device is open or not. 409 */ 410 if (intr_address != -1) { 411 sc->sc_intr_size = intr_size; 412 sc->sc_intr_buff = kmem_alloc(intr_size, KM_SLEEP); 413 error = usbd_open_pipe_intr(iface, intr_address, 414 USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc, sc->sc_intr_buff, 415 intr_size, u3g_intr, 100); 416 if (error) { 417 aprint_error_dev(self, "cannot open interrupt pipe " 418 "(addr %d)\n", intr_address); 419 return; 420 } 421 } else { 422 sc->sc_intr_pipe = NULL; 423 sc->sc_intr_buff = NULL; 424 } 425 426 if (!pmf_device_register(self, NULL, NULL)) 427 aprint_error_dev(self, "couldn't establish power handler\n"); 428 } 429 430 static int 431 u3g_detach(device_t self, int flags) 432 { 433 struct u3g_softc *sc = device_private(self); 434 int rv = 0; 435 436 sc->sc_dying = true; 437 438 if (sc->sc_intr_pipe != NULL) { 439 usbd_abort_pipe(sc->sc_intr_pipe); 440 usbd_close_pipe(sc->sc_intr_pipe); 441 sc->sc_intr_pipe = NULL; 442 } 443 if (sc->sc_intr_buff != NULL) { 444 kmem_free(sc->sc_intr_buff, sc->sc_intr_size); 445 sc->sc_intr_buff = NULL; 446 } 447 448 for (size_t i = 0; i < sc->sc_ncom; i++) 449 if (sc->sc_com[i].c_dev != NULL) { 450 int port_rv; 451 452 port_rv = config_detach(sc->sc_com[i].c_dev, flags); 453 if (port_rv != 0) { 454 aprint_verbose_dev(self, "Can't deallocate " 455 "port (%d)", port_rv); 456 } 457 rv |= port_rv; 458 sc->sc_com[i].c_dev = NULL; 459 } 460 461 pmf_device_deregister(self); 462 463 return rv; 464 } 465 466 static void 467 u3g_childdet(device_t self, device_t child) 468 { 469 struct u3g_softc *sc = device_private(self); 470 471 for (size_t i = 0; i < sc->sc_ncom; i++) 472 if (sc->sc_com[i].c_dev == child) 473 sc->sc_com[i].c_dev = NULL; 474 } 475 476 static void 477 u3g_intr(struct usbd_xfer *xfer, void *priv, usbd_status status) 478 { 479 struct u3g_softc *sc = (struct u3g_softc *)priv; 480 u_char *buf; 481 int portno = 0; /* XXX */ 482 struct u3g_com *com = &sc->sc_com[portno]; 483 484 if (sc->sc_dying) 485 return; 486 487 if (status != USBD_NORMAL_COMPLETION) { 488 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 489 return; 490 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 491 return; 492 } 493 494 buf = sc->sc_intr_buff; 495 if (buf[0] == 0xa1 && buf[1] == 0x20) { 496 u_char msr; 497 498 msr = com->c_msr & ~(UMSR_DCD | UMSR_DSR | UMSR_RI); 499 500 if (buf[8] & U3G_INPIN_DCD) 501 msr |= UMSR_DCD; 502 503 if (buf[8] & U3G_INPIN_DSR) 504 msr |= UMSR_DSR; 505 506 if (buf[8] & U3G_INPIN_RI) 507 msr |= UMSR_RI; 508 509 if (msr != com->c_msr) { 510 com->c_msr = msr; 511 if (com->c_open) 512 ucom_status_change(device_private(com->c_dev)); 513 } 514 } 515 } 516 517 /*ARGSUSED*/ 518 static void 519 u3g_get_status(void *arg, int portno, u_char *lsr, u_char *msr) 520 { 521 struct u3g_softc *sc = arg; 522 523 *lsr = 0; /* LSR isn't supported */ 524 *msr = sc->sc_com[portno].c_msr; 525 } 526 527 /*ARGSUSED*/ 528 static void 529 u3g_set(void *arg, int portno, int reg, int onoff) 530 { 531 struct u3g_softc *sc = arg; 532 usb_device_request_t req; 533 uint16_t mask, new_state; 534 usbd_status err; 535 struct u3g_com *com = &sc->sc_com[portno]; 536 537 if (sc->sc_dying) 538 return; 539 540 switch (reg) { 541 case UCOM_SET_DTR: 542 mask = U3G_OUTPIN_DTR; 543 break; 544 case UCOM_SET_RTS: 545 mask = U3G_OUTPIN_RTS; 546 break; 547 default: 548 return; 549 } 550 551 new_state = com->c_outpins & ~mask; 552 if (onoff) 553 new_state |= mask; 554 555 if (new_state == com->c_outpins) 556 return; 557 558 com->c_outpins = new_state; 559 560 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 561 req.bRequest = U3G_SET_PIN; 562 USETW(req.wValue, new_state); 563 USETW(req.wIndex, sc->sc_ifaceno); 564 USETW(req.wLength, 0); 565 566 err = usbd_do_request(sc->sc_udev, &req, 0); 567 if (err == USBD_STALLED) 568 usbd_clear_endpoint_stall(sc->sc_udev->ud_pipe0); 569 } 570 571 /*ARGSUSED*/ 572 static int 573 u3g_open(void *arg, int portno) 574 { 575 struct u3g_softc *sc = arg; 576 usb_endpoint_descriptor_t *ed; 577 usb_interface_descriptor_t *id; 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 id = usbd_get_interface_descriptor(sc->sc_iface); 586 587 for (nin = i = 0; i < id->bNumEndpoints; i++) { 588 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 589 if (ed == NULL) 590 return EIO; 591 592 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 593 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK && 594 nin++ == portno) { 595 err = usbd_clear_endpoint_feature(sc->sc_udev, 596 ed->bEndpointAddress, UF_ENDPOINT_HALT); 597 if (err) 598 return EIO; 599 } 600 } 601 602 com->c_open = true; 603 com->c_purging = true; 604 getmicrotime(&com->c_purge_start); 605 606 return 0; 607 } 608 609 /*ARGSUSED*/ 610 static void 611 u3g_close(void *arg, int portno) 612 { 613 struct u3g_softc *sc = arg; 614 struct u3g_com *com = &sc->sc_com[portno]; 615 616 com->c_open = false; 617 } 618 619 /*ARGSUSED*/ 620 static void 621 u3g_read(void *arg, int portno, u_char **cpp, uint32_t *ccp) 622 { 623 struct u3g_softc *sc = arg; 624 struct timeval curr_tv, diff_tv; 625 struct u3g_com *com = &sc->sc_com[portno]; 626 627 /* 628 * If we're not purging input data following first open, do nothing. 629 */ 630 if (com->c_purging == false) 631 return; 632 633 /* 634 * Otherwise check if the purge timeout has expired 635 */ 636 getmicrotime(&curr_tv); 637 timersub(&curr_tv, &com->c_purge_start, &diff_tv); 638 639 if (diff_tv.tv_sec >= U3G_PURGE_SECS) { 640 /* Timeout expired. */ 641 com->c_purging = false; 642 } else { 643 /* Still purging. Adjust the caller's byte count. */ 644 *ccp = 0; 645 } 646 } 647 648 /*ARGSUSED*/ 649 static void 650 u3g_write(void *arg, int portno, u_char *to, u_char *from, uint32_t *count) 651 { 652 struct u3g_softc *sc = arg; 653 struct u3g_com *com = &sc->sc_com[portno]; 654 655 /* 656 * Stop purging as soon as the first data is written to the device. 657 */ 658 com->c_purging = false; 659 memcpy(to, from, *count); 660 } 661