The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/ubsa.c

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    1 /*-
    2  * Copyright (c) 2002, Alexander Kabaev <kan.FreeBSD.org>.
    3  * All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  *
   14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   24  * SUCH DAMAGE.
   25  */
   26 
   27 #include <sys/cdefs.h>
   28 __FBSDID("$FreeBSD: releng/7.3/sys/dev/usb/ubsa.c 190268 2009-03-22 16:27:14Z n_hibma $");
   29 /*-
   30  * Copyright (c) 2001 The NetBSD Foundation, Inc.
   31  * All rights reserved.
   32  *
   33  * This code is derived from software contributed to The NetBSD Foundation
   34  * by Ichiro FUKUHARA (ichiro@ichiro.org).
   35  *
   36  * Redistribution and use in source and binary forms, with or without
   37  * modification, are permitted provided that the following conditions
   38  * are met:
   39  * 1. Redistributions of source code must retain the above copyright
   40  *    notice, this list of conditions and the following disclaimer.
   41  * 2. Redistributions in binary form must reproduce the above copyright
   42  *    notice, this list of conditions and the following disclaimer in the
   43  *    documentation and/or other materials provided with the distribution.
   44  * 3. All advertising materials mentioning features or use of this software
   45  *    must display the following acknowledgement:
   46  *        This product includes software developed by the NetBSD
   47  *        Foundation, Inc. and its contributors.
   48  * 4. Neither the name of The NetBSD Foundation nor the names of its
   49  *    contributors may be used to endorse or promote products derived
   50  *    from this software without specific prior written permission.
   51  *
   52  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   53  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   54  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   55  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   56  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   57  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   58  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   59  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   60  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   61  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   62  * POSSIBILITY OF SUCH DAMAGE.
   63  */
   64 
   65 #include <sys/param.h>
   66 #include <sys/systm.h>
   67 #include <sys/kernel.h>
   68 #include <sys/malloc.h>
   69 #include <sys/module.h>
   70 #include <sys/bus.h>
   71 #include <sys/ioccom.h>
   72 #include <sys/fcntl.h>
   73 #include <sys/taskqueue.h>
   74 #include <sys/conf.h>
   75 #include <sys/tty.h>
   76 #include <sys/file.h>
   77 #include <sys/selinfo.h>
   78 #include <sys/proc.h>
   79 #include <sys/poll.h>
   80 #include <sys/sysctl.h>
   81 
   82 #include <dev/usb/usb.h>
   83 #include <dev/usb/usbcdc.h>
   84 
   85 #include <dev/usb/usbdi.h>
   86 #include <dev/usb/usbdi_util.h>
   87 #include "usbdevs.h"
   88 #include <dev/usb/usb_quirks.h>
   89 
   90 #include <dev/usb/ucomvar.h>
   91 
   92 #ifdef USB_DEBUG
   93 static int      ubsadebug = 0;
   94 SYSCTL_NODE(_hw_usb, OID_AUTO, ubsa, CTLFLAG_RW, 0, "USB ubsa");
   95 SYSCTL_INT(_hw_usb_ubsa, OID_AUTO, debug, CTLFLAG_RW,
   96            &ubsadebug, 0, "ubsa debug level");
   97 
   98 #define DPRINTFN(n, x)  do { \
   99                                 if (ubsadebug > (n)) \
  100                                         printf x; \
  101                         } while (0)
  102 #else
  103 #define DPRINTFN(n, x)
  104 #endif
  105 #define DPRINTF(x) DPRINTFN(0, x)
  106 
  107 #define UBSA_MODVER             1       /* module version */
  108 
  109 #define UBSA_CONFIG_INDEX       1
  110 #define UBSA_IFACE_INDEX        0
  111 
  112 #define UBSA_INTR_INTERVAL      100     /* ms */
  113 
  114 #define UBSA_SET_BAUDRATE       0x00
  115 #define UBSA_SET_STOP_BITS      0x01
  116 #define UBSA_SET_DATA_BITS      0x02
  117 #define UBSA_SET_PARITY         0x03
  118 #define UBSA_SET_DTR            0x0A
  119 #define UBSA_SET_RTS            0x0B
  120 #define UBSA_SET_BREAK          0x0C
  121 #define UBSA_SET_FLOW_CTRL      0x10
  122 
  123 #define UBSA_PARITY_NONE        0x00
  124 #define UBSA_PARITY_EVEN        0x01
  125 #define UBSA_PARITY_ODD         0x02
  126 #define UBSA_PARITY_MARK        0x03
  127 #define UBSA_PARITY_SPACE       0x04
  128 
  129 #define UBSA_FLOW_NONE          0x0000
  130 #define UBSA_FLOW_OCTS          0x0001
  131 #define UBSA_FLOW_ODSR          0x0002
  132 #define UBSA_FLOW_IDSR          0x0004
  133 #define UBSA_FLOW_IDTR          0x0008
  134 #define UBSA_FLOW_IRTS          0x0010
  135 #define UBSA_FLOW_ORTS          0x0020
  136 #define UBSA_FLOW_UNKNOWN       0x0040
  137 #define UBSA_FLOW_OXON          0x0080
  138 #define UBSA_FLOW_IXON          0x0100
  139 
  140 /* line status register */
  141 #define UBSA_LSR_TSRE           0x40    /* Transmitter empty: byte sent */
  142 #define UBSA_LSR_TXRDY          0x20    /* Transmitter buffer empty */
  143 #define UBSA_LSR_BI             0x10    /* Break detected */
  144 #define UBSA_LSR_FE             0x08    /* Framing error: bad stop bit */
  145 #define UBSA_LSR_PE             0x04    /* Parity error */
  146 #define UBSA_LSR_OE             0x02    /* Overrun, lost incoming byte */
  147 #define UBSA_LSR_RXRDY          0x01    /* Byte ready in Receive Buffer */
  148 #define UBSA_LSR_RCV_MASK       0x1f    /* Mask for incoming data or error */
  149 
  150 /* modem status register */
  151 /* All deltas are from the last read of the MSR. */
  152 #define UBSA_MSR_DCD            0x80    /* Current Data Carrier Detect */
  153 #define UBSA_MSR_RI             0x40    /* Current Ring Indicator */
  154 #define UBSA_MSR_DSR            0x20    /* Current Data Set Ready */
  155 #define UBSA_MSR_CTS            0x10    /* Current Clear to Send */
  156 #define UBSA_MSR_DDCD           0x08    /* DCD has changed state */
  157 #define UBSA_MSR_TERI           0x04    /* RI has toggled low to high */
  158 #define UBSA_MSR_DDSR           0x02    /* DSR has changed state */
  159 #define UBSA_MSR_DCTS           0x01    /* CTS has changed state */
  160 
  161 struct  ubsa_softc {
  162         struct ucom_softc       sc_ucom;
  163 
  164         int                     sc_iface_number;        /* interface number */
  165 
  166         usbd_interface_handle   sc_intr_iface;  /* interrupt interface */
  167         int                     sc_intr_number; /* interrupt number */
  168         usbd_pipe_handle        sc_intr_pipe;   /* interrupt pipe */
  169         u_char                  *sc_intr_buf;   /* interrupt buffer */
  170         int                     sc_isize;
  171 
  172         u_char                  sc_dtr;         /* current DTR state */
  173         u_char                  sc_rts;         /* current RTS state */
  174 
  175         u_char                  sc_lsr;         /* Local status register */
  176         u_char                  sc_msr;         /* ubsa status register */
  177         struct task             sc_task;
  178 };
  179 
  180 static  void ubsa_intr(usbd_xfer_handle, usbd_private_handle, usbd_status);
  181 static  void ubsa_notify(void *, int count);
  182 
  183 static  void ubsa_get_status(void *, int, u_char *, u_char *);
  184 static  void ubsa_set(void *, int, int, int);
  185 static  int  ubsa_param(void *, int, struct termios *);
  186 static  int  ubsa_open(void *, int);
  187 static  void ubsa_close(void *, int);
  188 
  189 static  int  ubsa_request(struct ubsa_softc *, u_int8_t, u_int16_t);
  190 static  void ubsa_dtr(struct ubsa_softc *, int);
  191 static  void ubsa_rts(struct ubsa_softc *, int);
  192 static  void ubsa_baudrate(struct ubsa_softc *, speed_t);
  193 static  void ubsa_parity(struct ubsa_softc *, tcflag_t);
  194 static  void ubsa_databits(struct ubsa_softc *, tcflag_t);
  195 static  void ubsa_stopbits(struct ubsa_softc *, tcflag_t);
  196 static  void ubsa_flow(struct ubsa_softc *, tcflag_t, tcflag_t);
  197 
  198 struct ucom_callback ubsa_callback = {
  199         ubsa_get_status,
  200         ubsa_set,
  201         ubsa_param,
  202         NULL,
  203         ubsa_open,
  204         ubsa_close,
  205         NULL,
  206         NULL
  207 };
  208 
  209 static const struct ubsa_product {
  210         uint16_t        vendor;
  211         uint16_t        product;
  212 } ubsa_products [] = {
  213         /* AnyData ADU-500A */
  214         { USB_VENDOR_ANYDATA, USB_PRODUCT_ANYDATA_ADU_500A },
  215         /* AnyData ADU-E100A/H */
  216         { USB_VENDOR_ANYDATA, USB_PRODUCT_ANYDATA_ADU_E100X },
  217         /* Axesstel MV100H */
  218         { USB_VENDOR_AXESSTEL, USB_PRODUCT_AXESSTEL_DATAMODEM },
  219         /* BELKIN F5U103 */
  220         { USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U103 },
  221         /* BELKIN F5U120 */
  222         { USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U120 },
  223         /* GoHubs GO-COM232 */
  224         { USB_VENDOR_ETEK, USB_PRODUCT_ETEK_1COM },
  225         /* GoHubs GO-COM232 */
  226         { USB_VENDOR_GOHUBS, USB_PRODUCT_GOHUBS_GOCOM232 },
  227         /* Peracom */
  228         { USB_VENDOR_PERACOM, USB_PRODUCT_PERACOM_SERIAL1 },
  229         { 0, 0 }
  230 };
  231 
  232 static device_probe_t ubsa_match;
  233 static device_attach_t ubsa_attach;
  234 static device_detach_t ubsa_detach;
  235 
  236 static device_method_t ubsa_methods[] = {
  237         /* Device interface */
  238         DEVMETHOD(device_probe, ubsa_match),
  239         DEVMETHOD(device_attach, ubsa_attach),
  240         DEVMETHOD(device_detach, ubsa_detach),
  241         { 0, 0 }
  242 };
  243 
  244 static driver_t ubsa_driver = {
  245         "ucom",
  246         ubsa_methods,
  247         sizeof (struct ubsa_softc)
  248 };
  249 
  250 DRIVER_MODULE(ubsa, uhub, ubsa_driver, ucom_devclass, usbd_driver_load, 0);
  251 MODULE_DEPEND(ubsa, usb, 1, 1, 1);
  252 MODULE_DEPEND(ubsa, ucom, UCOM_MINVER, UCOM_PREFVER, UCOM_MAXVER);
  253 MODULE_VERSION(ubsa, UBSA_MODVER);
  254 
  255 static int
  256 ubsa_match(device_t self)
  257 {
  258         struct usb_attach_arg *uaa = device_get_ivars(self);
  259         int i;
  260 
  261         if (uaa->iface != NULL)
  262                 return (UMATCH_NONE);
  263 
  264         for (i = 0; ubsa_products[i].vendor != 0; i++) {
  265                 if (ubsa_products[i].vendor == uaa->vendor &&
  266                     ubsa_products[i].product == uaa->product) {
  267                         return (UMATCH_VENDOR_PRODUCT);
  268                 }
  269         }
  270         return (UMATCH_NONE);
  271 }
  272 
  273 static int
  274 ubsa_attach(device_t self)
  275 {
  276         struct ubsa_softc *sc = device_get_softc(self);
  277         struct usb_attach_arg *uaa = device_get_ivars(self);
  278         usbd_device_handle dev;
  279         struct ucom_softc *ucom;
  280         usb_config_descriptor_t *cdesc;
  281         usb_interface_descriptor_t *id;
  282         usb_endpoint_descriptor_t *ed;
  283         usbd_status err;
  284         int i;
  285 
  286         dev = uaa->device;
  287         ucom = &sc->sc_ucom;
  288 
  289         /*
  290          * initialize rts, dtr variables to something
  291          * different from boolean 0, 1
  292          */
  293         sc->sc_dtr = -1;
  294         sc->sc_rts = -1;
  295 
  296         ucom->sc_dev = self;
  297         ucom->sc_udev = dev;
  298         ucom->sc_iface = uaa->iface;
  299 
  300         DPRINTF(("ubsa attach: sc = %p\n", sc));
  301 
  302         /* initialize endpoints */
  303         ucom->sc_bulkin_no = ucom->sc_bulkout_no = -1;
  304         sc->sc_intr_number = -1;
  305         sc->sc_intr_pipe = NULL;
  306 
  307         /* Move the device into the configured state. */
  308         err = usbd_set_config_index(dev, UBSA_CONFIG_INDEX, 1);
  309         if (err) {
  310                 device_printf(ucom->sc_dev, "failed to set configuration: %s\n",
  311                     usbd_errstr(err));
  312                 ucom->sc_dying = 1;
  313                 goto error;
  314         }
  315 
  316         /* get the config descriptor */
  317         cdesc = usbd_get_config_descriptor(ucom->sc_udev);
  318 
  319         if (cdesc == NULL) {
  320                 device_printf(ucom->sc_dev,
  321                     "failed to get configuration descriptor\n");
  322                 ucom->sc_dying = 1;
  323                 goto error;
  324         }
  325 
  326         /* get the first interface */
  327         err = usbd_device2interface_handle(dev, UBSA_IFACE_INDEX,
  328             &ucom->sc_iface);
  329         if (err) {
  330                 device_printf(ucom->sc_dev, "failed to get interface: %s\n",
  331                     usbd_errstr(err));
  332                 ucom->sc_dying = 1;
  333                 goto error;
  334         }
  335 
  336         /* Find the endpoints */
  337 
  338         id = usbd_get_interface_descriptor(ucom->sc_iface);
  339         sc->sc_iface_number = id->bInterfaceNumber;
  340 
  341         for (i = 0; i < id->bNumEndpoints; i++) {
  342                 ed = usbd_interface2endpoint_descriptor(ucom->sc_iface, i);
  343                 if (ed == NULL) {
  344                         device_printf(ucom->sc_dev,
  345                             "no endpoint descriptor for %d\n", i);
  346                         ucom->sc_dying = 1;
  347                         goto error;
  348                 }
  349 
  350                 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
  351                     UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) {
  352                         sc->sc_intr_number = ed->bEndpointAddress;
  353                         sc->sc_isize = UGETW(ed->wMaxPacketSize);
  354                 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
  355                     UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
  356                         ucom->sc_bulkin_no = ed->bEndpointAddress;
  357                         ucom->sc_ibufsize = UGETW(ed->wMaxPacketSize);
  358                 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
  359                     UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
  360                         ucom->sc_bulkout_no = ed->bEndpointAddress;
  361                         ucom->sc_obufsize = UGETW(ed->wMaxPacketSize);
  362                 }
  363         }
  364 
  365         if (sc->sc_intr_number == -1) {
  366                 device_printf(ucom->sc_dev, "Could not find interrupt in\n");
  367                 ucom->sc_dying = 1;
  368                 goto error;
  369         }
  370 
  371         /* keep interface for interrupt */
  372         sc->sc_intr_iface = ucom->sc_iface;
  373 
  374         if (ucom->sc_bulkin_no == -1) {
  375                 device_printf(ucom->sc_dev, "Could not find data bulk in\n");
  376                 ucom->sc_dying = 1;
  377                 goto error;
  378         }
  379 
  380         if (ucom->sc_bulkout_no == -1) {
  381                 device_printf(ucom->sc_dev, "Could not find data bulk out\n");
  382                 ucom->sc_dying = 1;
  383                 goto error;
  384         }
  385 
  386         ucom->sc_parent = sc;
  387         ucom->sc_portno = UCOM_UNK_PORTNO;
  388         /* bulkin, bulkout set above */
  389         ucom->sc_ibufsize = 1024;
  390         ucom->sc_obufsize = 1024;
  391         ucom->sc_ibufsizepad = ucom->sc_ibufsize;
  392         ucom->sc_opkthdrlen = 0;
  393         ucom->sc_callback = &ubsa_callback;
  394 
  395         DPRINTF(("ubsa: in = 0x%x, out = 0x%x, intr = 0x%x\n",
  396             ucom->sc_bulkin_no, ucom->sc_bulkout_no, sc->sc_intr_number));
  397 
  398         TASK_INIT(&sc->sc_task, 0, ubsa_notify, sc); 
  399         ucom_attach(ucom);
  400         return 0;
  401 
  402 error:
  403         return ENXIO;
  404 }
  405 
  406 static int
  407 ubsa_detach(device_t self)
  408 {
  409         struct ubsa_softc *sc = device_get_softc(self);
  410         int rv;
  411 
  412         DPRINTF(("ubsa_detach: sc = %p\n", sc));
  413 
  414         if (sc->sc_intr_pipe != NULL) {
  415                 usbd_abort_pipe(sc->sc_intr_pipe);
  416                 usbd_close_pipe(sc->sc_intr_pipe);
  417                 free(sc->sc_intr_buf, M_USBDEV);
  418                 sc->sc_intr_pipe = NULL;
  419         }
  420 
  421         sc->sc_ucom.sc_dying = 1;
  422 #if 0
  423         taskqueue_drain(taskqueue_swi_giant);
  424 #endif
  425         rv = ucom_detach(&sc->sc_ucom);
  426 
  427         return (rv);
  428 }
  429 
  430 static int
  431 ubsa_request(struct ubsa_softc *sc, u_int8_t request, u_int16_t value)
  432 {
  433         usb_device_request_t req;
  434         usbd_status err;
  435 
  436         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
  437         req.bRequest = request;
  438         USETW(req.wValue, value);
  439         USETW(req.wIndex, sc->sc_iface_number);
  440         USETW(req.wLength, 0);
  441 
  442         err = usbd_do_request(sc->sc_ucom.sc_udev, &req, 0);
  443         if (err)
  444                 device_printf(sc->sc_ucom.sc_dev, "ubsa_request(%x, %x): %s\n",
  445                     request, value, usbd_errstr(err));
  446         return (err);
  447 }
  448 
  449 static void
  450 ubsa_dtr(struct ubsa_softc *sc, int onoff)
  451 {
  452 
  453         DPRINTF(("ubsa_dtr: onoff = %d\n", onoff));
  454 
  455         if (sc->sc_dtr == onoff)
  456                 return;
  457         sc->sc_dtr = onoff;
  458 
  459         ubsa_request(sc, UBSA_SET_DTR, onoff ? 1 : 0);
  460 }
  461 
  462 static void
  463 ubsa_rts(struct ubsa_softc *sc, int onoff)
  464 {
  465 
  466         DPRINTF(("ubsa_rts: onoff = %d\n", onoff));
  467 
  468         if (sc->sc_rts == onoff)
  469                 return;
  470         sc->sc_rts = onoff;
  471 
  472         ubsa_request(sc, UBSA_SET_RTS, onoff ? 1 : 0);
  473 }
  474 
  475 static void
  476 ubsa_break(struct ubsa_softc *sc, int onoff)
  477 {
  478 
  479         DPRINTF(("ubsa_rts: onoff = %d\n", onoff));
  480 
  481         ubsa_request(sc, UBSA_SET_BREAK, onoff ? 1 : 0);
  482 }
  483 
  484 static void
  485 ubsa_set(void *addr, int portno, int reg, int onoff)
  486 {
  487         struct ubsa_softc *sc;
  488 
  489         sc = addr;
  490         switch (reg) {
  491         case UCOM_SET_DTR:
  492                 ubsa_dtr(sc, onoff);
  493                 break;
  494         case UCOM_SET_RTS:
  495                 ubsa_rts(sc, onoff);
  496                 break;
  497         case UCOM_SET_BREAK:
  498                 ubsa_break(sc, onoff);
  499                 break;
  500         default:
  501                 break;
  502         }
  503 }
  504 
  505 static void
  506 ubsa_baudrate(struct ubsa_softc *sc, speed_t speed)
  507 {
  508         u_int16_t value = 0;
  509 
  510         DPRINTF(("ubsa_baudrate: speed = %d\n", speed));
  511 
  512         switch(speed) {
  513         case B0:
  514                 break;
  515         case B300:
  516         case B600:
  517         case B1200:
  518         case B2400:
  519         case B4800:
  520         case B9600:
  521         case B19200:
  522         case B38400:
  523         case B57600:
  524         case B115200:
  525         case B230400:
  526                 value = B230400 / speed;
  527                 break;
  528         default:
  529                 device_printf(sc->sc_ucom.sc_dev,
  530                     "ubsa_param: unsupported baud, forcing default of 9600\n");
  531                 value = B230400 / B9600;
  532                 break;
  533         };
  534 
  535         if (speed == B0) {
  536                 ubsa_flow(sc, 0, 0);
  537                 ubsa_dtr(sc, 0);
  538                 ubsa_rts(sc, 0);
  539         } else
  540                 ubsa_request(sc, UBSA_SET_BAUDRATE, value);
  541 }
  542 
  543 static void
  544 ubsa_parity(struct ubsa_softc *sc, tcflag_t cflag)
  545 {
  546         int value;
  547 
  548         DPRINTF(("ubsa_parity: cflag = 0x%x\n", cflag));
  549 
  550         if (cflag & PARENB)
  551                 value = (cflag & PARODD) ? UBSA_PARITY_ODD : UBSA_PARITY_EVEN;
  552         else
  553                 value = UBSA_PARITY_NONE;
  554 
  555         ubsa_request(sc, UBSA_SET_PARITY, value);
  556 }
  557 
  558 static void
  559 ubsa_databits(struct ubsa_softc *sc, tcflag_t cflag)
  560 {
  561         int value;
  562 
  563         DPRINTF(("ubsa_databits: cflag = 0x%x\n", cflag));
  564 
  565         switch (cflag & CSIZE) {
  566         case CS5: value = 0; break;
  567         case CS6: value = 1; break;
  568         case CS7: value = 2; break;
  569         case CS8: value = 3; break;
  570         default:
  571                 device_printf(sc->sc_ucom.sc_dev,
  572                     "ubsa_param: unsupported databits requested, "
  573                     "forcing default of 8\n");
  574                 value = 3;
  575         }
  576 
  577         ubsa_request(sc, UBSA_SET_DATA_BITS, value);
  578 }
  579 
  580 static void
  581 ubsa_stopbits(struct ubsa_softc *sc, tcflag_t cflag)
  582 {
  583         int value;
  584 
  585         DPRINTF(("ubsa_stopbits: cflag = 0x%x\n", cflag));
  586 
  587         value = (cflag & CSTOPB) ? 1 : 0;
  588 
  589         ubsa_request(sc, UBSA_SET_STOP_BITS, value);
  590 }
  591 
  592 static void
  593 ubsa_flow(struct ubsa_softc *sc, tcflag_t cflag, tcflag_t iflag)
  594 {
  595         int value;
  596 
  597         DPRINTF(("ubsa_flow: cflag = 0x%x, iflag = 0x%x\n", cflag, iflag));
  598 
  599         value = 0;
  600         if (cflag & CRTSCTS)
  601                 value |= UBSA_FLOW_OCTS | UBSA_FLOW_IRTS;
  602         if (iflag & (IXON|IXOFF))
  603                 value |= UBSA_FLOW_OXON | UBSA_FLOW_IXON;
  604 
  605         ubsa_request(sc, UBSA_SET_FLOW_CTRL, value);
  606 }
  607 
  608 static int
  609 ubsa_param(void *addr, int portno, struct termios *ti)
  610 {
  611         struct ubsa_softc *sc;
  612 
  613         sc = addr;
  614 
  615         DPRINTF(("ubsa_param: sc = %p\n", sc));
  616 
  617         ubsa_baudrate(sc, ti->c_ospeed);
  618         ubsa_parity(sc, ti->c_cflag);
  619         ubsa_databits(sc, ti->c_cflag);
  620         ubsa_stopbits(sc, ti->c_cflag);
  621         ubsa_flow(sc, ti->c_cflag, ti->c_iflag);
  622 
  623         return (0);
  624 }
  625 
  626 static int
  627 ubsa_open(void *addr, int portno)
  628 {
  629         struct ubsa_softc *sc;
  630         int err;
  631 
  632         sc = addr;
  633         if (sc->sc_ucom.sc_dying)
  634                 return (ENXIO);
  635 
  636         DPRINTF(("ubsa_open: sc = %p\n", sc));
  637 
  638         if (sc->sc_intr_number != -1 && sc->sc_intr_pipe == NULL) {
  639                 sc->sc_intr_buf = malloc(sc->sc_isize, M_USBDEV, M_WAITOK);
  640                 err = usbd_open_pipe_intr(sc->sc_intr_iface,
  641                     sc->sc_intr_number,
  642                     USBD_SHORT_XFER_OK,
  643                     &sc->sc_intr_pipe,
  644                     sc,
  645                     sc->sc_intr_buf,
  646                     sc->sc_isize,
  647                     ubsa_intr,
  648                     UBSA_INTR_INTERVAL);
  649                 if (err) {
  650                         device_printf(sc->sc_ucom.sc_dev,
  651                             "cannot open interrupt pipe (addr %d)\n",
  652                             sc->sc_intr_number);
  653                         return (EIO);
  654                 }
  655         }
  656 
  657         return (0);
  658 }
  659 
  660 static void
  661 ubsa_close(void *addr, int portno)
  662 {
  663         struct ubsa_softc *sc;
  664         int err;
  665 
  666         sc = addr;
  667         if (sc->sc_ucom.sc_dying)
  668                 return;
  669 
  670         DPRINTF(("ubsa_close: close\n"));
  671 
  672         if (sc->sc_intr_pipe != NULL) {
  673                 err = usbd_abort_pipe(sc->sc_intr_pipe);
  674                 if (err)
  675                         device_printf(sc->sc_ucom.sc_dev,
  676                             "abort interrupt pipe failed: %s\n",
  677                             usbd_errstr(err));
  678                 err = usbd_close_pipe(sc->sc_intr_pipe);
  679                 if (err)
  680                         device_printf(sc->sc_ucom.sc_dev,
  681                             "close interrupt pipe failed: %s\n",
  682                             usbd_errstr(err));
  683                 free(sc->sc_intr_buf, M_USBDEV);
  684                 sc->sc_intr_pipe = NULL;
  685         }
  686 }
  687 
  688 static void
  689 ubsa_intr(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
  690 {
  691         struct ubsa_softc *sc;
  692         u_char *buf;
  693 
  694         sc = priv;
  695         buf = sc->sc_intr_buf;
  696         if (sc->sc_ucom.sc_dying)
  697                 return;
  698 
  699         if (status != USBD_NORMAL_COMPLETION) {
  700                 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
  701                         return;
  702 
  703                 DPRINTF(("%s: ubsa_intr: abnormal status: %s\n",
  704                     device_get_nameunit(sc->sc_ucom.sc_dev),
  705                     usbd_errstr(status)));
  706                 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe);
  707                 return;
  708         }
  709 
  710         /* incidentally, Belkin adapter status bits match UART 16550 bits */
  711         sc->sc_lsr = buf[2];
  712         sc->sc_msr = buf[3];
  713 
  714         DPRINTF(("%s: ubsa lsr = 0x%02x, msr = 0x%02x\n",
  715             device_get_nameunit(sc->sc_ucom.sc_dev), sc->sc_lsr, sc->sc_msr));
  716 
  717         taskqueue_enqueue(taskqueue_swi_giant, &sc->sc_task);
  718 }
  719 
  720 /* Handle delayed events. */
  721 static void
  722 ubsa_notify(void *arg, int count)
  723 {
  724         struct ubsa_softc *sc;
  725 
  726         sc = arg;
  727         ucom_status_change(&sc->sc_ucom);
  728 }
  729 
  730 static void
  731 ubsa_get_status(void *addr, int portno, u_char *lsr, u_char *msr)
  732 {
  733         struct ubsa_softc *sc;
  734 
  735         DPRINTF(("ubsa_get_status\n"));
  736 
  737         sc = addr;
  738         if (lsr != NULL)
  739                 *lsr = sc->sc_lsr;
  740         if (msr != NULL)
  741                 *msr = sc->sc_msr;
  742 }

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