ucycom.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
    1 #include <sys/cdefs.h>
    2 __FBSDID("$FreeBSD$");
    3 
    4 /*-
    5  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    6  *
    7  * Copyright (c) 2004 Dag-Erling Coïdan Smørgrav
    8  * All rights reserved.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer
   15  *    in this position and unchanged.
   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  * 3. The name of the author may not be used to endorse or promote products
   20  *    derived from this software without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  */
   33 
   34 /*
   35  * Device driver for Cypress CY7C637xx and CY7C640/1xx series USB to
   36  * RS232 bridges.
   37  */
   38 
   39 #include <sys/stdint.h>
   40 #include <sys/stddef.h>
   41 #include <sys/param.h>
   42 #include <sys/queue.h>
   43 #include <sys/types.h>
   44 #include <sys/systm.h>
   45 #include <sys/kernel.h>
   46 #include <sys/bus.h>
   47 #include <sys/module.h>
   48 #include <sys/lock.h>
   49 #include <sys/mutex.h>
   50 #include <sys/condvar.h>
   51 #include <sys/sysctl.h>
   52 #include <sys/sx.h>
   53 #include <sys/unistd.h>
   54 #include <sys/callout.h>
   55 #include <sys/malloc.h>
   56 #include <sys/priv.h>
   57 
   58 #include <dev/hid/hid.h>
   59 
   60 #include <dev/usb/usb.h>
   61 #include <dev/usb/usbdi.h>
   62 #include <dev/usb/usbdi_util.h>
   63 #include <dev/usb/usbhid.h>
   64 #include "usbdevs.h"
   65 
   66 #define USB_DEBUG_VAR usb_debug
   67 #include <dev/usb/usb_debug.h>
   68 #include <dev/usb/usb_process.h>
   69 
   70 #include <dev/usb/serial/usb_serial.h>
   71 
   72 #define UCYCOM_MAX_IOLEN        (1024 + 2)      /* bytes */
   73 
   74 #define UCYCOM_IFACE_INDEX      0
   75 
   76 enum {
   77         UCYCOM_CTRL_RD,
   78         UCYCOM_INTR_RD,
   79         UCYCOM_N_TRANSFER,
   80 };
   81 
   82 struct ucycom_softc {
   83         struct ucom_super_softc sc_super_ucom;
   84         struct ucom_softc sc_ucom;
   85 
   86         struct usb_device *sc_udev;
   87         struct usb_xfer *sc_xfer[UCYCOM_N_TRANSFER];
   88         struct mtx sc_mtx;
   89 
   90         uint32_t sc_model;
   91 #define MODEL_CY7C63743         0x63743
   92 #define MODEL_CY7C64013         0x64013
   93 
   94         uint16_t sc_flen;               /* feature report length */
   95         uint16_t sc_ilen;               /* input report length */
   96         uint16_t sc_olen;               /* output report length */
   97 
   98         uint8_t sc_fid;                 /* feature report id */
   99         uint8_t sc_iid;                 /* input report id */
  100         uint8_t sc_oid;                 /* output report id */
  101         uint8_t sc_cfg;
  102 #define UCYCOM_CFG_RESET        0x80
  103 #define UCYCOM_CFG_PARODD       0x20
  104 #define UCYCOM_CFG_PAREN        0x10
  105 #define UCYCOM_CFG_STOPB        0x08
  106 #define UCYCOM_CFG_DATAB        0x03
  107         uint8_t sc_ist;                 /* status flags from last input */
  108         uint8_t sc_iface_no;
  109         uint8_t sc_temp_cfg[32];
  110 };
  111 
  112 /* prototypes */
  113 
  114 static device_probe_t ucycom_probe;
  115 static device_attach_t ucycom_attach;
  116 static device_detach_t ucycom_detach;
  117 static void ucycom_free_softc(struct ucycom_softc *);
  118 
  119 static usb_callback_t ucycom_ctrl_write_callback;
  120 static usb_callback_t ucycom_intr_read_callback;
  121 
  122 static void     ucycom_free(struct ucom_softc *);
  123 static void     ucycom_cfg_open(struct ucom_softc *);
  124 static void     ucycom_start_read(struct ucom_softc *);
  125 static void     ucycom_stop_read(struct ucom_softc *);
  126 static void     ucycom_start_write(struct ucom_softc *);
  127 static void     ucycom_stop_write(struct ucom_softc *);
  128 static void     ucycom_cfg_write(struct ucycom_softc *, uint32_t, uint8_t);
  129 static int      ucycom_pre_param(struct ucom_softc *, struct termios *);
  130 static void     ucycom_cfg_param(struct ucom_softc *, struct termios *);
  131 static void     ucycom_poll(struct ucom_softc *ucom);
  132 
  133 static const struct usb_config ucycom_config[UCYCOM_N_TRANSFER] = {
  134         [UCYCOM_CTRL_RD] = {
  135                 .type = UE_CONTROL,
  136                 .endpoint = 0x00,       /* Control pipe */
  137                 .direction = UE_DIR_ANY,
  138                 .bufsize = (sizeof(struct usb_device_request) + UCYCOM_MAX_IOLEN),
  139                 .callback = &ucycom_ctrl_write_callback,
  140                 .timeout = 1000,        /* 1 second */
  141         },
  142 
  143         [UCYCOM_INTR_RD] = {
  144                 .type = UE_INTERRUPT,
  145                 .endpoint = UE_ADDR_ANY,
  146                 .direction = UE_DIR_IN,
  147                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
  148                 .bufsize = UCYCOM_MAX_IOLEN,
  149                 .callback = &ucycom_intr_read_callback,
  150         },
  151 };
  152 
  153 static const struct ucom_callback ucycom_callback = {
  154         .ucom_cfg_param = &ucycom_cfg_param,
  155         .ucom_cfg_open = &ucycom_cfg_open,
  156         .ucom_pre_param = &ucycom_pre_param,
  157         .ucom_start_read = &ucycom_start_read,
  158         .ucom_stop_read = &ucycom_stop_read,
  159         .ucom_start_write = &ucycom_start_write,
  160         .ucom_stop_write = &ucycom_stop_write,
  161         .ucom_poll = &ucycom_poll,
  162         .ucom_free = &ucycom_free,
  163 };
  164 
  165 static device_method_t ucycom_methods[] = {
  166         DEVMETHOD(device_probe, ucycom_probe),
  167         DEVMETHOD(device_attach, ucycom_attach),
  168         DEVMETHOD(device_detach, ucycom_detach),
  169         DEVMETHOD_END
  170 };
  171 
  172 static driver_t ucycom_driver = {
  173         .name = "ucycom",
  174         .methods = ucycom_methods,
  175         .size = sizeof(struct ucycom_softc),
  176 };
  177 
  178 /*
  179  * Supported devices
  180  */
  181 static const STRUCT_USB_HOST_ID ucycom_devs[] = {
  182         {USB_VPI(USB_VENDOR_DELORME, USB_PRODUCT_DELORME_EARTHMATE, MODEL_CY7C64013)},
  183 };
  184 
  185 DRIVER_MODULE(ucycom, uhub, ucycom_driver, NULL, NULL);
  186 MODULE_DEPEND(ucycom, ucom, 1, 1, 1);
  187 MODULE_DEPEND(ucycom, usb, 1, 1, 1);
  188 MODULE_DEPEND(ucycom, hid, 1, 1, 1);
  189 MODULE_VERSION(ucycom, 1);
  190 USB_PNP_HOST_INFO(ucycom_devs);
  191 
  192 #define UCYCOM_DEFAULT_RATE      4800
  193 #define UCYCOM_DEFAULT_CFG       0x03   /* N-8-1 */
  194 
  195 static int
  196 ucycom_probe(device_t dev)
  197 {
  198         struct usb_attach_arg *uaa = device_get_ivars(dev);
  199 
  200         if (uaa->usb_mode != USB_MODE_HOST) {
  201                 return (ENXIO);
  202         }
  203         if (uaa->info.bConfigIndex != 0) {
  204                 return (ENXIO);
  205         }
  206         if (uaa->info.bIfaceIndex != UCYCOM_IFACE_INDEX) {
  207                 return (ENXIO);
  208         }
  209         return (usbd_lookup_id_by_uaa(ucycom_devs, sizeof(ucycom_devs), uaa));
  210 }
  211 
  212 static int
  213 ucycom_attach(device_t dev)
  214 {
  215         struct usb_attach_arg *uaa = device_get_ivars(dev);
  216         struct ucycom_softc *sc = device_get_softc(dev);
  217         void *urd_ptr = NULL;
  218         int32_t error;
  219         uint16_t urd_len;
  220         uint8_t iface_index;
  221 
  222         sc->sc_udev = uaa->device;
  223 
  224         device_set_usb_desc(dev);
  225         mtx_init(&sc->sc_mtx, "ucycom", NULL, MTX_DEF);
  226         ucom_ref(&sc->sc_super_ucom);
  227 
  228         DPRINTF("\n");
  229 
  230         /* get chip model */
  231         sc->sc_model = USB_GET_DRIVER_INFO(uaa);
  232         if (sc->sc_model == 0) {
  233                 device_printf(dev, "unsupported device\n");
  234                 goto detach;
  235         }
  236         device_printf(dev, "Cypress CY7C%X USB to RS232 bridge\n", sc->sc_model);
  237 
  238         /* get report descriptor */
  239 
  240         error = usbd_req_get_hid_desc(uaa->device, NULL,
  241             &urd_ptr, &urd_len, M_USBDEV,
  242             UCYCOM_IFACE_INDEX);
  243 
  244         if (error) {
  245                 device_printf(dev, "failed to get report "
  246                     "descriptor: %s\n",
  247                     usbd_errstr(error));
  248                 goto detach;
  249         }
  250         /* get report sizes */
  251 
  252         sc->sc_flen = hid_report_size_max(urd_ptr, urd_len, hid_feature, &sc->sc_fid);
  253         sc->sc_ilen = hid_report_size_max(urd_ptr, urd_len, hid_input, &sc->sc_iid);
  254         sc->sc_olen = hid_report_size_max(urd_ptr, urd_len, hid_output, &sc->sc_oid);
  255 
  256         if ((sc->sc_ilen > UCYCOM_MAX_IOLEN) || (sc->sc_ilen < 1) ||
  257             (sc->sc_olen > UCYCOM_MAX_IOLEN) || (sc->sc_olen < 2) ||
  258             (sc->sc_flen > UCYCOM_MAX_IOLEN) || (sc->sc_flen < 5)) {
  259                 device_printf(dev, "invalid report size i=%d, o=%d, f=%d, max=%d\n",
  260                     sc->sc_ilen, sc->sc_olen, sc->sc_flen,
  261                     UCYCOM_MAX_IOLEN);
  262                 goto detach;
  263         }
  264         sc->sc_iface_no = uaa->info.bIfaceNum;
  265 
  266         iface_index = UCYCOM_IFACE_INDEX;
  267         error = usbd_transfer_setup(uaa->device, &iface_index,
  268             sc->sc_xfer, ucycom_config, UCYCOM_N_TRANSFER,
  269             sc, &sc->sc_mtx);
  270         if (error) {
  271                 device_printf(dev, "allocating USB "
  272                     "transfers failed\n");
  273                 goto detach;
  274         }
  275         error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
  276             &ucycom_callback, &sc->sc_mtx);
  277         if (error) {
  278                 goto detach;
  279         }
  280         ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
  281 
  282         if (urd_ptr) {
  283                 free(urd_ptr, M_USBDEV);
  284         }
  285 
  286         return (0);                     /* success */
  287 
  288 detach:
  289         if (urd_ptr) {
  290                 free(urd_ptr, M_USBDEV);
  291         }
  292         ucycom_detach(dev);
  293         return (ENXIO);
  294 }
  295 
  296 static int
  297 ucycom_detach(device_t dev)
  298 {
  299         struct ucycom_softc *sc = device_get_softc(dev);
  300 
  301         ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
  302         usbd_transfer_unsetup(sc->sc_xfer, UCYCOM_N_TRANSFER);
  303 
  304         device_claim_softc(dev);
  305 
  306         ucycom_free_softc(sc);
  307 
  308         return (0);
  309 }
  310 
  311 UCOM_UNLOAD_DRAIN(ucycom);
  312 
  313 static void
  314 ucycom_free_softc(struct ucycom_softc *sc)
  315 {
  316         if (ucom_unref(&sc->sc_super_ucom)) {
  317                 mtx_destroy(&sc->sc_mtx);
  318                 device_free_softc(sc);
  319         }
  320 }
  321 
  322 static void
  323 ucycom_free(struct ucom_softc *ucom)
  324 {
  325         ucycom_free_softc(ucom->sc_parent);
  326 }
  327 
  328 static void
  329 ucycom_cfg_open(struct ucom_softc *ucom)
  330 {
  331         struct ucycom_softc *sc = ucom->sc_parent;
  332 
  333         /* set default configuration */
  334         ucycom_cfg_write(sc, UCYCOM_DEFAULT_RATE, UCYCOM_DEFAULT_CFG);
  335 }
  336 
  337 static void
  338 ucycom_start_read(struct ucom_softc *ucom)
  339 {
  340         struct ucycom_softc *sc = ucom->sc_parent;
  341 
  342         usbd_transfer_start(sc->sc_xfer[UCYCOM_INTR_RD]);
  343 }
  344 
  345 static void
  346 ucycom_stop_read(struct ucom_softc *ucom)
  347 {
  348         struct ucycom_softc *sc = ucom->sc_parent;
  349 
  350         usbd_transfer_stop(sc->sc_xfer[UCYCOM_INTR_RD]);
  351 }
  352 
  353 static void
  354 ucycom_start_write(struct ucom_softc *ucom)
  355 {
  356         struct ucycom_softc *sc = ucom->sc_parent;
  357 
  358         usbd_transfer_start(sc->sc_xfer[UCYCOM_CTRL_RD]);
  359 }
  360 
  361 static void
  362 ucycom_stop_write(struct ucom_softc *ucom)
  363 {
  364         struct ucycom_softc *sc = ucom->sc_parent;
  365 
  366         usbd_transfer_stop(sc->sc_xfer[UCYCOM_CTRL_RD]);
  367 }
  368 
  369 static void
  370 ucycom_ctrl_write_callback(struct usb_xfer *xfer, usb_error_t error)
  371 {
  372         struct ucycom_softc *sc = usbd_xfer_softc(xfer);
  373         struct usb_device_request req;
  374         struct usb_page_cache *pc0, *pc1;
  375         uint8_t data[2];
  376         uint8_t offset;
  377         uint32_t actlen;
  378 
  379         pc0 = usbd_xfer_get_frame(xfer, 0);
  380         pc1 = usbd_xfer_get_frame(xfer, 1);
  381 
  382         switch (USB_GET_STATE(xfer)) {
  383         case USB_ST_TRANSFERRED:
  384 tr_transferred:
  385         case USB_ST_SETUP:
  386 
  387                 switch (sc->sc_model) {
  388                 case MODEL_CY7C63743:
  389                         offset = 1;
  390                         break;
  391                 case MODEL_CY7C64013:
  392                         offset = 2;
  393                         break;
  394                 default:
  395                         offset = 0;
  396                         break;
  397                 }
  398 
  399                 if (ucom_get_data(&sc->sc_ucom, pc1, offset,
  400                     sc->sc_olen - offset, &actlen)) {
  401                         req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
  402                         req.bRequest = UR_SET_REPORT;
  403                         USETW2(req.wValue, UHID_OUTPUT_REPORT, sc->sc_oid);
  404                         req.wIndex[0] = sc->sc_iface_no;
  405                         req.wIndex[1] = 0;
  406                         USETW(req.wLength, sc->sc_olen);
  407 
  408                         switch (sc->sc_model) {
  409                         case MODEL_CY7C63743:
  410                                 data[0] = actlen;
  411                                 break;
  412                         case MODEL_CY7C64013:
  413                                 data[0] = 0;
  414                                 data[1] = actlen;
  415                                 break;
  416                         default:
  417                                 break;
  418                         }
  419 
  420                         usbd_copy_in(pc0, 0, &req, sizeof(req));
  421                         usbd_copy_in(pc1, 0, data, offset);
  422 
  423                         usbd_xfer_set_frame_len(xfer, 0, sizeof(req));
  424                         usbd_xfer_set_frame_len(xfer, 1, sc->sc_olen);
  425                         usbd_xfer_set_frames(xfer, sc->sc_olen ? 2 : 1);
  426                         usbd_transfer_submit(xfer);
  427                 }
  428                 return;
  429 
  430         default:                        /* Error */
  431                 if (error == USB_ERR_CANCELLED) {
  432                         return;
  433                 }
  434                 DPRINTF("error=%s\n",
  435                     usbd_errstr(error));
  436                 goto tr_transferred;
  437         }
  438 }
  439 
  440 static void
  441 ucycom_cfg_write(struct ucycom_softc *sc, uint32_t baud, uint8_t cfg)
  442 {
  443         struct usb_device_request req;
  444         uint16_t len;
  445         usb_error_t err;
  446 
  447         len = sc->sc_flen;
  448         if (len > sizeof(sc->sc_temp_cfg)) {
  449                 len = sizeof(sc->sc_temp_cfg);
  450         }
  451         sc->sc_cfg = cfg;
  452 
  453         req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
  454         req.bRequest = UR_SET_REPORT;
  455         USETW2(req.wValue, UHID_FEATURE_REPORT, sc->sc_fid);
  456         req.wIndex[0] = sc->sc_iface_no;
  457         req.wIndex[1] = 0;
  458         USETW(req.wLength, len);
  459 
  460         sc->sc_temp_cfg[0] = (baud & 0xff);
  461         sc->sc_temp_cfg[1] = (baud >> 8) & 0xff;
  462         sc->sc_temp_cfg[2] = (baud >> 16) & 0xff;
  463         sc->sc_temp_cfg[3] = (baud >> 24) & 0xff;
  464         sc->sc_temp_cfg[4] = cfg;
  465 
  466         err = ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
  467             &req, sc->sc_temp_cfg, 0, 1000);
  468         if (err) {
  469                 DPRINTFN(0, "device request failed, err=%s "
  470                     "(ignored)\n", usbd_errstr(err));
  471         }
  472 }
  473 
  474 static int
  475 ucycom_pre_param(struct ucom_softc *ucom, struct termios *t)
  476 {
  477         switch (t->c_ospeed) {
  478                 case 600:
  479                 case 1200:
  480                 case 2400:
  481                 case 4800:
  482                 case 9600:
  483                 case 19200:
  484                 case 38400:
  485                 case 57600:
  486 #if 0
  487                 /*
  488                  * Stock chips only support standard baud rates in the 600 - 57600
  489                  * range, but higher rates can be achieved using custom firmware.
  490                  */
  491                 case 115200:
  492                 case 153600:
  493                 case 192000:
  494 #endif
  495                 break;
  496         default:
  497                 return (EINVAL);
  498         }
  499         return (0);
  500 }
  501 
  502 static void
  503 ucycom_cfg_param(struct ucom_softc *ucom, struct termios *t)
  504 {
  505         struct ucycom_softc *sc = ucom->sc_parent;
  506         uint8_t cfg;
  507 
  508         DPRINTF("\n");
  509 
  510         if (t->c_cflag & CIGNORE) {
  511                 cfg = sc->sc_cfg;
  512         } else {
  513                 cfg = 0;
  514                 switch (t->c_cflag & CSIZE) {
  515                 default:
  516                 case CS8:
  517                         ++cfg;
  518                 case CS7:
  519                         ++cfg;
  520                 case CS6:
  521                         ++cfg;
  522                 case CS5:
  523                         break;
  524                 }
  525 
  526                 if (t->c_cflag & CSTOPB)
  527                         cfg |= UCYCOM_CFG_STOPB;
  528                 if (t->c_cflag & PARENB)
  529                         cfg |= UCYCOM_CFG_PAREN;
  530                 if (t->c_cflag & PARODD)
  531                         cfg |= UCYCOM_CFG_PARODD;
  532         }
  533 
  534         ucycom_cfg_write(sc, t->c_ospeed, cfg);
  535 }
  536 
  537 static void
  538 ucycom_intr_read_callback(struct usb_xfer *xfer, usb_error_t error)
  539 {
  540         struct ucycom_softc *sc = usbd_xfer_softc(xfer);
  541         struct usb_page_cache *pc;
  542         uint8_t buf[2];
  543         uint32_t offset;
  544         int len;
  545         int actlen;
  546 
  547         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
  548         pc = usbd_xfer_get_frame(xfer, 0);
  549 
  550         switch (USB_GET_STATE(xfer)) {
  551         case USB_ST_TRANSFERRED:
  552                 switch (sc->sc_model) {
  553                 case MODEL_CY7C63743:
  554                         if (actlen < 1) {
  555                                 goto tr_setup;
  556                         }
  557                         usbd_copy_out(pc, 0, buf, 1);
  558 
  559                         sc->sc_ist = buf[0] & ~0x07;
  560                         len = buf[0] & 0x07;
  561 
  562                         actlen--;
  563                         offset = 1;
  564 
  565                         break;
  566 
  567                 case MODEL_CY7C64013:
  568                         if (actlen < 2) {
  569                                 goto tr_setup;
  570                         }
  571                         usbd_copy_out(pc, 0, buf, 2);
  572 
  573                         sc->sc_ist = buf[0] & ~0x07;
  574                         len = buf[1];
  575 
  576                         actlen -= 2;
  577                         offset = 2;
  578 
  579                         break;
  580 
  581                 default:
  582                         DPRINTFN(0, "unsupported model number\n");
  583                         goto tr_setup;
  584                 }
  585 
  586                 if (len > actlen)
  587                         len = actlen;
  588                 if (len)
  589                         ucom_put_data(&sc->sc_ucom, pc, offset, len);
  590                 /* FALLTHROUGH */
  591         case USB_ST_SETUP:
  592 tr_setup:
  593                 usbd_xfer_set_frame_len(xfer, 0, sc->sc_ilen);
  594                 usbd_transfer_submit(xfer);
  595                 return;
  596 
  597         default:                        /* Error */
  598                 if (error != USB_ERR_CANCELLED) {
  599                         /* try to clear stall first */
  600                         usbd_xfer_set_stall(xfer);
  601                         goto tr_setup;
  602                 }
  603                 return;
  604         }
  605 }
  606 
  607 static void
  608 ucycom_poll(struct ucom_softc *ucom)
  609 {
  610         struct ucycom_softc *sc = ucom->sc_parent;
  611         usbd_transfer_poll(sc->sc_xfer, UCYCOM_N_TRANSFER);
  612 }
Cache object: be3568ff19e33198ece9dbcb36ee3432
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.
FreeBSD/Linux Kernel Cross Reference sys/dev/usb/serial/ucycom.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/serial/ucycom.c
