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

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    1 /*
    2  * $NetBSD: umodem.c,v 1.45 2002/09/23 05:51:23 simonb Exp $
    3  * $FreeBSD: src/sys/dev/usb/umodem.c,v 1.48 2003/08/24 17:55:55 obrien Exp $
    4  */
    5 
    6 /*-
    7  * Copyright (c) 2003, M. Warner Losh <imp@freebsd.org>.
    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  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 
   32 /*
   33  * Copyright (c) 1998 The NetBSD Foundation, Inc.
   34  * All rights reserved.
   35  *
   36  * This code is derived from software contributed to The NetBSD Foundation
   37  * by Lennart Augustsson (lennart@augustsson.net) at
   38  * Carlstedt Research & Technology.
   39  *
   40  * Redistribution and use in source and binary forms, with or without
   41  * modification, are permitted provided that the following conditions
   42  * are met:
   43  * 1. Redistributions of source code must retain the above copyright
   44  *    notice, this list of conditions and the following disclaimer.
   45  * 2. Redistributions in binary form must reproduce the above copyright
   46  *    notice, this list of conditions and the following disclaimer in the
   47  *    documentation and/or other materials provided with the distribution.
   48  * 3. All advertising materials mentioning features or use of this software
   49  *    must display the following acknowledgement:
   50  *        This product includes software developed by the NetBSD
   51  *        Foundation, Inc. and its contributors.
   52  * 4. Neither the name of The NetBSD Foundation nor the names of its
   53  *    contributors may be used to endorse or promote products derived
   54  *    from this software without specific prior written permission.
   55  *
   56  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   57  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   58  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   59  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   60  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   61  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   62  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   63  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   64  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   65  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   66  * POSSIBILITY OF SUCH DAMAGE.
   67  */
   68 
   69 /*
   70  * Comm Class spec:  http://www.usb.org/developers/devclass_docs/usbccs10.pdf
   71  *                   http://www.usb.org/developers/devclass_docs/usbcdc11.pdf
   72  */
   73 
   74 /*
   75  * TODO:
   76  * - Add error recovery in various places; the big problem is what
   77  *   to do in a callback if there is an error.
   78  * - Implement a Call Device for modems without multiplexed commands.
   79  *
   80  */
   81 
   82 #include <sys/param.h>
   83 #include <sys/systm.h>
   84 #include <sys/kernel.h>
   85 #include <sys/conf.h>
   86 #include <sys/tty.h>
   87 #include <sys/file.h>
   88 #include <sys/select.h>
   89 #include <sys/sysctl.h>
   90 #include <sys/proc.h>
   91 #include <sys/bus.h>
   92 #include <sys/poll.h>
   93 
   94 #include <bus/usb/usb.h>
   95 #include <bus/usb/usbcdc.h>
   96 
   97 #include <bus/usb/usbdi.h>
   98 #include <bus/usb/usbdi_util.h>
   99 #include <dev/usbmisc/ucom/ucomvar.h>
  100 #include <bus/usb/usb_quirks.h>
  101 
  102 #ifdef USB_DEBUG
  103 int     umodemdebug = 0;
  104 SYSCTL_NODE(_hw_usb, OID_AUTO, umodem, CTLFLAG_RW, 0, "USB umodem");
  105 SYSCTL_INT(_hw_usb_umodem, OID_AUTO, debug, CTLFLAG_RW,
  106            &umodemdebug, 0, "umodem debug level");
  107 #define DPRINTFN(n, x) do { if (umodemdebug > (n)) kprintf x; } while (0)
  108 #else
  109 #define DPRINTFN(n, x)
  110 #endif
  111 #define DPRINTF(x) DPRINTFN(0, x)
  112 
  113 /*
  114  * These are the maximum number of bytes transferred per frame. These
  115  * values were increased from 64/256 used in older versions of the driver
  116  * to better support EVDO wireless PPP. Old values were good enough for
  117  * normal modems, but not for really high speed devices.
  118  *
  119  * The sizes should not be increased further, or there will be problems
  120  * with contiguous storage allocation.
  121  */
  122 #define UMODEMIBUFSIZE 4096
  123 #define UMODEMOBUFSIZE 4096
  124 
  125 #define UMODEM_MODVER                   1       /* module version */
  126 
  127 struct umodem_softc {
  128         struct ucom_softc       sc_ucom;
  129 
  130         device_t                sc_dev;         /* base device */
  131 
  132         usbd_device_handle      sc_udev;        /* USB device */
  133 
  134         int                     sc_ctl_iface_no;
  135         usbd_interface_handle   sc_ctl_iface;   /* control interface */
  136         int                     sc_data_iface_no;
  137         usbd_interface_handle   sc_data_iface;  /* data interface */
  138 
  139         int                     sc_cm_cap;      /* CM capabilities */
  140         int                     sc_acm_cap;     /* ACM capabilities */
  141 
  142         int                     sc_cm_over_data;
  143 
  144         usb_cdc_line_state_t    sc_line_state;  /* current line state */
  145         u_char                  sc_dtr;         /* current DTR state */
  146         u_char                  sc_rts;         /* current RTS state */
  147 
  148         u_char                  sc_opening;     /* lock during open */
  149 
  150         int                     sc_ctl_notify;  /* Notification endpoint */
  151         usbd_pipe_handle        sc_notify_pipe; /* Notification pipe */
  152         usb_cdc_notification_t  sc_notify_buf;  /* Notification structure */
  153         u_char                  sc_lsr;         /* Local status register */
  154         u_char                  sc_msr;         /* Modem status register */
  155 };
  156 
  157 static usbd_status umodem_set_comm_feature(struct umodem_softc *sc,
  158                                            int feature, int state);
  159 static usbd_status umodem_set_line_coding(struct umodem_softc *sc,
  160                                           usb_cdc_line_state_t *state);
  161 
  162 static int      umodem_get_caps(usbd_device_handle, int *, int *,
  163                                 usb_interface_descriptor_t *);
  164 
  165 static void     umodem_get_status(void *, int portno, u_char *lsr, u_char *msr);
  166 static void     umodem_set(void *, int, int, int);
  167 static void     umodem_dtr(struct umodem_softc *, int);
  168 static void     umodem_rts(struct umodem_softc *, int);
  169 static void     umodem_break(struct umodem_softc *, int);
  170 static void     umodem_set_line_state(struct umodem_softc *);
  171 static int      umodem_param(void *, int, struct termios *);
  172 static int      umodem_ioctl(void *, int, u_long, caddr_t, int, struct thread * );
  173 static int      umodem_open(void *, int portno);
  174 static void     umodem_close(void *, int portno);
  175 static void     umodem_intr(usbd_xfer_handle, usbd_private_handle, usbd_status);
  176 
  177 static struct ucom_callback umodem_callback = {
  178         umodem_get_status,
  179         umodem_set,
  180         umodem_param,
  181         umodem_ioctl,
  182         umodem_open,
  183         umodem_close,
  184         NULL,
  185         NULL,
  186 };
  187 
  188 static device_probe_t umodem_match;
  189 static device_attach_t umodem_attach;
  190 static device_detach_t umodem_detach;
  191 
  192 static device_method_t umodem_methods[] = {
  193         /* Device interface */
  194         DEVMETHOD(device_probe, umodem_match),
  195         DEVMETHOD(device_attach, umodem_attach),
  196         DEVMETHOD(device_detach, umodem_detach),
  197         DEVMETHOD_END
  198 };
  199 
  200 static driver_t umodem_driver = {
  201         "ucom",
  202         umodem_methods,
  203         sizeof (struct umodem_softc)
  204 };
  205 
  206 DRIVER_MODULE(umodem, uhub, umodem_driver, ucom_devclass, usbd_driver_load, NULL);
  207 MODULE_DEPEND(umodem, usb, 1, 1, 1);
  208 MODULE_DEPEND(umodem, ucom, UCOM_MINVER, UCOM_PREFVER, UCOM_MAXVER);
  209 MODULE_VERSION(umodem, UMODEM_MODVER);
  210 
  211 static int
  212 umodem_match(device_t self)
  213 {
  214         struct usb_attach_arg *uaa = device_get_ivars(self);
  215         usb_interface_descriptor_t *id;
  216         int cm, acm;
  217 
  218         if (uaa->iface == NULL)
  219                 return (UMATCH_NONE);
  220 
  221         id = usbd_get_interface_descriptor(uaa->iface);
  222         if (id == NULL ||
  223             id->bInterfaceClass != UICLASS_CDC ||
  224             id->bInterfaceSubClass != UISUBCLASS_ABSTRACT_CONTROL_MODEL ||
  225             id->bInterfaceProtocol != UIPROTO_CDC_AT)
  226                 return (UMATCH_NONE);
  227 
  228         if (umodem_get_caps(uaa->device, &cm, &acm, id) == -1)
  229                 return (UMATCH_NONE);
  230 
  231         return (UMATCH_IFACECLASS_IFACESUBCLASS_IFACEPROTO);
  232 }
  233 
  234 static int
  235 umodem_attach(device_t self)
  236 {
  237         struct umodem_softc *sc = device_get_softc(self);
  238         struct usb_attach_arg *uaa = device_get_ivars(self);
  239         usbd_device_handle dev = uaa->device;
  240         usb_interface_descriptor_t *id;
  241         usb_endpoint_descriptor_t *ed;
  242         const char *devname;
  243         usbd_status err;
  244         int data_ifcno;
  245         int i;
  246         struct ucom_softc *ucom;
  247 
  248         ucom = &sc->sc_ucom;
  249         ucom->sc_dev = self;
  250         sc->sc_dev = self;
  251         ucom->sc_udev = dev;
  252         ucom->sc_iface = uaa->iface;
  253 
  254         sc->sc_udev = dev;
  255         sc->sc_ctl_iface = uaa->iface;
  256 
  257         devname = device_get_nameunit(sc->sc_dev);
  258         /* XXX ? use something else ? XXX */
  259         id = usbd_get_interface_descriptor(sc->sc_ctl_iface);
  260         sc->sc_ctl_iface_no = id->bInterfaceNumber;
  261 
  262         sc->sc_data_iface_no = data_ifcno =
  263                 umodem_get_caps(dev, &sc->sc_cm_cap, &sc->sc_acm_cap, id);
  264 
  265         if (data_ifcno == -1) {
  266                 kprintf("%s: no pointer to data interface\n", devname);
  267                 goto bad;
  268         }
  269 
  270         kprintf("%s: data interface %d, has %sCM over data, has %sbreak\n",
  271                devname, data_ifcno,
  272                sc->sc_cm_cap & USB_CDC_CM_OVER_DATA ? "" : "no ",
  273                sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK ? "" : "no ");
  274 
  275         /* Get the data interface too. */
  276         for (i = 0; i < uaa->nifaces; i++) {
  277                 if (uaa->ifaces[i] != NULL) {
  278                         id = usbd_get_interface_descriptor(uaa->ifaces[i]);
  279                         if (id != NULL && id->bInterfaceNumber == data_ifcno) {
  280                                 sc->sc_data_iface = uaa->ifaces[i];
  281                                 uaa->ifaces[i] = NULL;
  282                         }
  283                 }
  284         }
  285         if (sc->sc_data_iface == NULL) {
  286                 kprintf("%s: no data interface\n", devname);
  287                 goto bad;
  288         }
  289         ucom->sc_iface = sc->sc_data_iface;
  290 
  291         /*
  292          * Find the bulk endpoints.
  293          * Iterate over all endpoints in the data interface and take note.
  294          */
  295         ucom->sc_bulkin_no = ucom->sc_bulkout_no = -1;
  296 
  297         id = usbd_get_interface_descriptor(sc->sc_data_iface);
  298         for (i = 0; i < id->bNumEndpoints; i++) {
  299                 ed = usbd_interface2endpoint_descriptor(sc->sc_data_iface, i);
  300                 if (ed == NULL) {
  301                         kprintf("%s: no endpoint descriptor for %d\n", devname,
  302                             i);
  303                         goto bad;
  304                 }
  305                 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
  306                     UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
  307                         ucom->sc_bulkin_no = ed->bEndpointAddress;
  308                 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT &&
  309                     UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) {
  310                         ucom->sc_bulkout_no = ed->bEndpointAddress;
  311                 }
  312         }
  313 
  314         if (ucom->sc_bulkin_no == -1) {
  315                 kprintf("%s: Could not find data bulk in\n", devname);
  316                 goto bad;
  317         }
  318         if (ucom->sc_bulkout_no == -1) {
  319                 kprintf("%s: Could not find data bulk out\n", devname);
  320                 goto bad;
  321         }
  322 
  323         if (usbd_get_quirks(sc->sc_udev)->uq_flags & UQ_ASSUME_CM_OVER_DATA) {
  324                 DPRINTF(("Quirk says to assume CM over data\n"));
  325                 sc->sc_cm_over_data = 1;
  326         } else {
  327                 if (sc->sc_cm_cap & USB_CDC_CM_OVER_DATA) {
  328                         if (sc->sc_acm_cap & USB_CDC_ACM_HAS_FEATURE)
  329                                 err = umodem_set_comm_feature(sc,
  330                                     UCDC_ABSTRACT_STATE, UCDC_DATA_MULTIPLEXED);
  331                         else
  332                                 err = 0;
  333                         if (err) {
  334                                 kprintf("%s: could not set data multiplex mode\n",
  335                                     devname);
  336                                 goto bad;
  337                         }
  338                         sc->sc_cm_over_data = 1;
  339                 }
  340         }
  341 
  342         /*
  343          * The standard allows for notification messages (to indicate things
  344          * like a modem hangup) to come in via an interrupt endpoint
  345          * off of the control interface.  Iterate over the endpoints on
  346          * the control interface and see if there are any interrupt
  347          * endpoints; if there are, then register it.
  348          */
  349 
  350         sc->sc_ctl_notify = -1;
  351         sc->sc_notify_pipe = NULL;
  352 
  353         for (i = 0; i < id->bNumEndpoints; i++) {
  354                 ed = usbd_interface2endpoint_descriptor(sc->sc_ctl_iface, i);
  355                 if (ed == NULL)
  356                         continue;
  357 
  358                 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN &&
  359                     (ed->bmAttributes & UE_XFERTYPE) == UE_INTERRUPT) {
  360                         kprintf("%s: status change notification available\n",
  361                             devname);
  362                         sc->sc_ctl_notify = ed->bEndpointAddress;
  363                 }
  364         }
  365 
  366         sc->sc_dtr = -1;
  367 
  368         ucom->sc_parent = sc;
  369         ucom->sc_portno = UCOM_UNK_PORTNO;
  370         /* bulkin, bulkout set above */
  371         ucom->sc_ibufsize = UMODEMIBUFSIZE;
  372         ucom->sc_obufsize = UMODEMOBUFSIZE;
  373         ucom->sc_ibufsizepad = UMODEMIBUFSIZE;
  374         ucom->sc_opkthdrlen = 0;
  375         ucom->sc_callback = &umodem_callback;
  376 
  377         ucom_attach(&sc->sc_ucom);
  378 
  379         return 0;
  380 
  381  bad:
  382         ucom->sc_dying = 1;
  383         return ENXIO;
  384 }
  385 
  386 static int
  387 umodem_open(void *addr, int portno)
  388 {
  389         struct umodem_softc *sc = addr;
  390         int err;
  391 
  392         DPRINTF(("umodem_open: sc=%p\n", sc));
  393 
  394         if (sc->sc_ctl_notify != -1 && sc->sc_notify_pipe == NULL) {
  395                 err = usbd_open_pipe_intr(sc->sc_ctl_iface, sc->sc_ctl_notify,
  396                     USBD_SHORT_XFER_OK, &sc->sc_notify_pipe, sc,
  397                     &sc->sc_notify_buf, sizeof(sc->sc_notify_buf),
  398                     umodem_intr, USBD_DEFAULT_INTERVAL);
  399 
  400                 if (err) {
  401                         DPRINTF(("Failed to establish notify pipe: %s\n",
  402                                 usbd_errstr(err)));
  403                         return EIO;
  404                 }
  405         }
  406 
  407         return 0;
  408 }
  409 
  410 static void
  411 umodem_close(void *addr, int portno)
  412 {
  413         struct umodem_softc *sc = addr;
  414         int err;
  415 
  416         DPRINTF(("umodem_close: sc=%p\n", sc));
  417 
  418         if (sc->sc_notify_pipe != NULL) {
  419                 err = usbd_abort_pipe(sc->sc_notify_pipe);
  420                 if (err)
  421                         kprintf("%s: abort notify pipe failed: %s\n",
  422                             device_get_nameunit(sc->sc_dev), usbd_errstr(err));
  423                 err = usbd_close_pipe(sc->sc_notify_pipe);
  424                 if (err)
  425                         kprintf("%s: close notify pipe failed: %s\n",
  426                             device_get_nameunit(sc->sc_dev), usbd_errstr(err));
  427                 sc->sc_notify_pipe = NULL;
  428         }
  429 }
  430 
  431 static void
  432 umodem_intr(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
  433 {
  434         struct umodem_softc *sc = priv;
  435         u_char mstatus;
  436 
  437         if (sc->sc_ucom.sc_dying)
  438                 return;
  439 
  440         if (status != USBD_NORMAL_COMPLETION) {
  441                 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
  442                         return;
  443                 kprintf("%s: abnormal status: %s\n", device_get_nameunit(sc->sc_dev),
  444                        usbd_errstr(status));
  445                 return;
  446         }
  447 
  448         if (sc->sc_notify_buf.bmRequestType != UCDC_NOTIFICATION) {
  449                 DPRINTF(("%s: unknown message type (%02x) on notify pipe\n",
  450                          device_get_nameunit(sc->sc_dev),
  451                          sc->sc_notify_buf.bmRequestType));
  452                 return;
  453         }
  454 
  455         switch (sc->sc_notify_buf.bNotification) {
  456         case UCDC_N_SERIAL_STATE:
  457                 /*
  458                  * Set the serial state in ucom driver based on
  459                  * the bits from the notify message
  460                  */
  461                 if (UGETW(sc->sc_notify_buf.wLength) != 2) {
  462                         kprintf("%s: Invalid notification length! (%d)\n",
  463                                device_get_nameunit(sc->sc_dev),
  464                                UGETW(sc->sc_notify_buf.wLength));
  465                         break;
  466                 }
  467                 DPRINTF(("%s: notify bytes = %02x%02x\n",
  468                          device_get_nameunit(sc->sc_dev),
  469                          sc->sc_notify_buf.data[0],
  470                          sc->sc_notify_buf.data[1]));
  471                 /* Currently, lsr is always zero. */
  472                 sc->sc_lsr = sc->sc_msr = 0;
  473                 mstatus = sc->sc_notify_buf.data[0];
  474 
  475                 if (ISSET(mstatus, UCDC_N_SERIAL_RI))
  476                         sc->sc_msr |= UMSR_RI;
  477                 if (ISSET(mstatus, UCDC_N_SERIAL_DSR))
  478                         sc->sc_msr |= UMSR_DSR;
  479                 if (ISSET(mstatus, UCDC_N_SERIAL_DCD))
  480                         sc->sc_msr |= UMSR_DCD;
  481                 ucom_status_change(&sc->sc_ucom);
  482                 break;
  483         default:
  484                 DPRINTF(("%s: unknown notify message: %02x\n",
  485                          device_get_nameunit(sc->sc_dev),
  486                          sc->sc_notify_buf.bNotification));
  487                 break;
  488         }
  489 }
  490 
  491 int
  492 umodem_get_caps(usbd_device_handle dev, int *cm, int *acm,
  493                 usb_interface_descriptor_t *id)
  494 {
  495         const usb_cdc_cm_descriptor_t *cmd;
  496         const usb_cdc_acm_descriptor_t *cad;
  497         const usb_cdc_union_descriptor_t *cud;
  498 
  499         *cm = *acm = 0;
  500 
  501         cmd = (const usb_cdc_cm_descriptor_t *)usb_find_desc_if(dev,
  502                                                         UDESC_CS_INTERFACE,
  503                                                         UDESCSUB_CDC_CM, id);
  504         if (cmd == NULL)
  505                 DPRINTF(("umodem_get_caps: no CM desc\n"));
  506         else
  507                 *cm = cmd->bmCapabilities;
  508 
  509         cad = (const usb_cdc_acm_descriptor_t *)usb_find_desc_if(dev,
  510                                                         UDESC_CS_INTERFACE,
  511                                                         UDESCSUB_CDC_ACM, id);
  512         if (cad == NULL)
  513                 DPRINTF(("umodem_get_caps: no ACM desc\n"));
  514         else
  515                 *acm = cad->bmCapabilities;
  516 
  517         cud = (const usb_cdc_union_descriptor_t *)usb_find_desc_if(dev,
  518                                                         UDESC_CS_INTERFACE,
  519                                                         UDESCSUB_CDC_UNION, id);
  520         if (cud == NULL)
  521                 DPRINTF(("umodem_get_caps: no UNION desc\n"));
  522 
  523         return cmd ? cmd->bDataInterface : cud ? cud->bSlaveInterface[0] : -1;
  524 }
  525 
  526 void
  527 umodem_get_status(void *addr, int portno, u_char *lsr, u_char *msr)
  528 {
  529         struct umodem_softc *sc = addr;
  530 
  531         DPRINTF(("umodem_get_status:\n"));
  532 
  533         if (lsr != NULL)
  534                 *lsr = sc->sc_lsr;
  535         if (msr != NULL)
  536                 *msr = sc->sc_msr;
  537 }
  538 
  539 int
  540 umodem_param(void *addr, int portno, struct termios *t)
  541 {
  542         struct umodem_softc *sc = addr;
  543         usbd_status err;
  544         usb_cdc_line_state_t ls;
  545 
  546         DPRINTF(("umodem_param: sc=%p\n", sc));
  547 
  548         USETDW(ls.dwDTERate, t->c_ospeed);
  549         if (ISSET(t->c_cflag, CSTOPB))
  550                 ls.bCharFormat = UCDC_STOP_BIT_2;
  551         else
  552                 ls.bCharFormat = UCDC_STOP_BIT_1;
  553         if (ISSET(t->c_cflag, PARENB)) {
  554                 if (ISSET(t->c_cflag, PARODD))
  555                         ls.bParityType = UCDC_PARITY_ODD;
  556                 else
  557                         ls.bParityType = UCDC_PARITY_EVEN;
  558         } else
  559                 ls.bParityType = UCDC_PARITY_NONE;
  560         switch (ISSET(t->c_cflag, CSIZE)) {
  561         case CS5:
  562                 ls.bDataBits = 5;
  563                 break;
  564         case CS6:
  565                 ls.bDataBits = 6;
  566                 break;
  567         case CS7:
  568                 ls.bDataBits = 7;
  569                 break;
  570         case CS8:
  571                 ls.bDataBits = 8;
  572                 break;
  573         }
  574 
  575         err = umodem_set_line_coding(sc, &ls);
  576         if (err) {
  577                 DPRINTF(("umodem_param: err=%s\n", usbd_errstr(err)));
  578                 return (ENOTTY);
  579         }
  580         return (0);
  581 }
  582 
  583 int
  584 umodem_ioctl(void *addr, int portno, u_long cmd, caddr_t data, int flag,
  585              struct thread * p)
  586 {
  587         struct umodem_softc *sc = addr;
  588         int error = 0;
  589 
  590         if (sc->sc_ucom.sc_dying)
  591                 return (EIO);
  592 
  593         DPRINTF(("umodem_ioctl: cmd=0x%08lx\n", cmd));
  594 
  595         switch (cmd) {
  596         case USB_GET_CM_OVER_DATA:
  597                 *(int *)data = sc->sc_cm_over_data;
  598                 break;
  599 
  600         case USB_SET_CM_OVER_DATA:
  601                 if (*(int *)data != sc->sc_cm_over_data) {
  602                         /* XXX change it */
  603                 }
  604                 break;
  605 
  606         default:
  607                 DPRINTF(("umodem_ioctl: unknown\n"));
  608                 error = ENOIOCTL;
  609                 break;
  610         }
  611 
  612         return (error);
  613 }
  614 
  615 void
  616 umodem_dtr(struct umodem_softc *sc, int onoff)
  617 {
  618         DPRINTF(("umodem_dtr: onoff=%d\n", onoff));
  619 
  620         if (sc->sc_dtr == onoff)
  621                 return;
  622         sc->sc_dtr = onoff;
  623 
  624         umodem_set_line_state(sc);
  625 }
  626 
  627 void
  628 umodem_rts(struct umodem_softc *sc, int onoff)
  629 {
  630         DPRINTF(("umodem_rts: onoff=%d\n", onoff));
  631 
  632         if (sc->sc_rts == onoff)
  633                 return;
  634         sc->sc_rts = onoff;
  635 
  636         umodem_set_line_state(sc);
  637 }
  638 
  639 void
  640 umodem_set_line_state(struct umodem_softc *sc)
  641 {
  642         usb_device_request_t req;
  643         int ls;
  644 
  645         ls = (sc->sc_dtr ? UCDC_LINE_DTR : 0) |
  646              (sc->sc_rts ? UCDC_LINE_RTS : 0);
  647         req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
  648         req.bRequest = UCDC_SET_CONTROL_LINE_STATE;
  649         USETW(req.wValue, ls);
  650         USETW(req.wIndex, sc->sc_ctl_iface_no);
  651         USETW(req.wLength, 0);
  652 
  653         (void)usbd_do_request(sc->sc_udev, &req, 0);
  654 
  655 }
  656 
  657 void
  658 umodem_break(struct umodem_softc *sc, int onoff)
  659 {
  660         usb_device_request_t req;
  661 
  662         DPRINTF(("umodem_break: onoff=%d\n", onoff));
  663 
  664         if (!(sc->sc_acm_cap & USB_CDC_ACM_HAS_BREAK))
  665                 return;
  666 
  667         req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
  668         req.bRequest = UCDC_SEND_BREAK;
  669         USETW(req.wValue, onoff ? UCDC_BREAK_ON : UCDC_BREAK_OFF);
  670         USETW(req.wIndex, sc->sc_ctl_iface_no);
  671         USETW(req.wLength, 0);
  672 
  673         (void)usbd_do_request(sc->sc_udev, &req, 0);
  674 }
  675 
  676 void
  677 umodem_set(void *addr, int portno, int reg, int onoff)
  678 {
  679         struct umodem_softc *sc = addr;
  680 
  681         switch (reg) {
  682         case UCOM_SET_DTR:
  683                 umodem_dtr(sc, onoff);
  684                 break;
  685         case UCOM_SET_RTS:
  686                 umodem_rts(sc, onoff);
  687                 break;
  688         case UCOM_SET_BREAK:
  689                 umodem_break(sc, onoff);
  690                 break;
  691         default:
  692                 break;
  693         }
  694 }
  695 
  696 usbd_status
  697 umodem_set_line_coding(struct umodem_softc *sc, usb_cdc_line_state_t *state)
  698 {
  699         usb_device_request_t req;
  700         usbd_status err;
  701 
  702         DPRINTF(("umodem_set_line_coding: rate=%d fmt=%d parity=%d bits=%d\n",
  703                  UGETDW(state->dwDTERate), state->bCharFormat,
  704                  state->bParityType, state->bDataBits));
  705 
  706         if (memcmp(state, &sc->sc_line_state, UCDC_LINE_STATE_LENGTH) == 0) {
  707                 DPRINTF(("umodem_set_line_coding: already set\n"));
  708                 return (USBD_NORMAL_COMPLETION);
  709         }
  710 
  711         req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
  712         req.bRequest = UCDC_SET_LINE_CODING;
  713         USETW(req.wValue, 0);
  714         USETW(req.wIndex, sc->sc_ctl_iface_no);
  715         USETW(req.wLength, UCDC_LINE_STATE_LENGTH);
  716 
  717         err = usbd_do_request(sc->sc_udev, &req, state);
  718         if (err) {
  719                 DPRINTF(("umodem_set_line_coding: failed, err=%s\n",
  720                          usbd_errstr(err)));
  721                 return (err);
  722         }
  723 
  724         sc->sc_line_state = *state;
  725 
  726         return (USBD_NORMAL_COMPLETION);
  727 }
  728 
  729 usbd_status
  730 umodem_set_comm_feature(struct umodem_softc *sc, int feature, int state)
  731 {
  732         usb_device_request_t req;
  733         usbd_status err;
  734         usb_cdc_abstract_state_t ast;
  735 
  736         DPRINTF(("umodem_set_comm_feature: feature=%d state=%d\n", feature,
  737                  state));
  738 
  739         req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
  740         req.bRequest = UCDC_SET_COMM_FEATURE;
  741         USETW(req.wValue, feature);
  742         USETW(req.wIndex, sc->sc_ctl_iface_no);
  743         USETW(req.wLength, UCDC_ABSTRACT_STATE_LENGTH);
  744         USETW(ast.wState, state);
  745 
  746         err = usbd_do_request(sc->sc_udev, &req, &ast);
  747         if (err) {
  748                 DPRINTF(("umodem_set_comm_feature: feature=%d, err=%s\n",
  749                          feature, usbd_errstr(err)));
  750                 return (err);
  751         }
  752 
  753         return (USBD_NORMAL_COMPLETION);
  754 }
  755 
  756 static int
  757 umodem_detach(device_t self)
  758 {
  759         struct umodem_softc *sc = device_get_softc(self);
  760         int rv = 0;
  761 
  762         DPRINTF(("umodem_detach: sc=%p\n", sc));
  763 
  764         if (sc->sc_notify_pipe != NULL) {
  765                 usbd_abort_pipe(sc->sc_notify_pipe);
  766                 usbd_close_pipe(sc->sc_notify_pipe);
  767                 sc->sc_notify_pipe = NULL;
  768         }
  769 
  770         sc->sc_ucom.sc_dying = 1;
  771         rv = ucom_detach(&sc->sc_ucom);
  772 
  773         return (rv);
  774 }

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