root/dev/usb/uftdi.c

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DEFINITIONS

This source file includes following definitions.
  1. uftdi_match
  2. uftdi_attach
  3. uftdi_activate
  4. uftdi_detach
  5. uftdi_open
  6. uftdi_read
  7. uftdi_write
  8. uftdi_set
  9. uftdi_param
  10. uftdi_get_status
  11. uftdi_break
  12. uftdi_8u232am_getrate

    1 /*      $OpenBSD: uftdi.c,v 1.41 2007/06/14 10:11:15 mbalmer Exp $      */
    2 /*      $NetBSD: uftdi.c,v 1.14 2003/02/23 04:20:07 simonb Exp $        */
    3 
    4 /*
    5  * Copyright (c) 2000 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Lennart Augustsson (lennart@augustsson.net).
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   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. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *        This product includes software developed by the NetBSD
   22  *        Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 /*
   41  * FTDI FT8U100AX serial adapter driver
   42  */
   43 
   44 /*
   45  * XXX This driver will not support multiple serial ports.
   46  * XXX The ucom layer needs to be extended first.
   47  */
   48 
   49 #include <sys/param.h>
   50 #include <sys/systm.h>
   51 #include <sys/kernel.h>
   52 #include <sys/device.h>
   53 #include <sys/conf.h>
   54 #include <sys/tty.h>
   55 
   56 #include <dev/usb/usb.h>
   57 #include <dev/usb/usbhid.h>
   58 
   59 #include <dev/usb/usbdi.h>
   60 #include <dev/usb/usbdi_util.h>
   61 #include <dev/usb/usbdevs.h>
   62 
   63 #include <dev/usb/ucomvar.h>
   64 
   65 #include <dev/usb/uftdireg.h>
   66 
   67 #ifdef UFTDI_DEBUG
   68 #define DPRINTF(x)      do { if (uftdidebug) printf x; } while (0)
   69 #define DPRINTFN(n,x)   do { if (uftdidebug>(n)) printf x; } while (0)
   70 int uftdidebug = 0;
   71 #else
   72 #define DPRINTF(x)
   73 #define DPRINTFN(n,x)
   74 #endif
   75 
   76 #define UFTDI_CONFIG_INDEX      0
   77 #define UFTDI_IFACE_INDEX       0
   78 
   79 
   80 /*
   81  * These are the maximum number of bytes transferred per frame.
   82  * The output buffer size cannot be increased due to the size encoding.
   83  */
   84 #define UFTDIIBUFSIZE 64
   85 #define UFTDIOBUFSIZE 64
   86 
   87 struct uftdi_softc {
   88         struct device            sc_dev;                /* base device */
   89         usbd_device_handle       sc_udev;       /* device */
   90         usbd_interface_handle    sc_iface;      /* interface */
   91 
   92         enum uftdi_type          sc_type;
   93         u_int                    sc_hdrlen;
   94 
   95         u_char                   sc_msr;
   96         u_char                   sc_lsr;
   97 
   98         struct device           *sc_subdev;
   99 
  100         u_char                   sc_dying;
  101 
  102         u_int                    last_lcr;
  103 };
  104 
  105 void    uftdi_get_status(void *, int portno, u_char *lsr, u_char *msr);
  106 void    uftdi_set(void *, int, int, int);
  107 int     uftdi_param(void *, int, struct termios *);
  108 int     uftdi_open(void *sc, int portno);
  109 void    uftdi_read(void *sc, int portno, u_char **ptr,
  110                            u_int32_t *count);
  111 void    uftdi_write(void *sc, int portno, u_char *to, u_char *from,
  112                             u_int32_t *count);
  113 void    uftdi_break(void *sc, int portno, int onoff);
  114 int     uftdi_8u232am_getrate(speed_t speed, int *rate);
  115 
  116 struct ucom_methods uftdi_methods = {
  117         uftdi_get_status,
  118         uftdi_set,
  119         uftdi_param,
  120         NULL,
  121         uftdi_open,
  122         NULL,
  123         uftdi_read,
  124         uftdi_write,
  125 };
  126 
  127 int uftdi_match(struct device *, void *, void *); 
  128 void uftdi_attach(struct device *, struct device *, void *); 
  129 int uftdi_detach(struct device *, int); 
  130 int uftdi_activate(struct device *, enum devact); 
  131 
  132 struct cfdriver uftdi_cd = { 
  133         NULL, "uftdi", DV_DULL 
  134 }; 
  135 
  136 const struct cfattach uftdi_ca = { 
  137         sizeof(struct uftdi_softc), 
  138         uftdi_match, 
  139         uftdi_attach, 
  140         uftdi_detach, 
  141         uftdi_activate, 
  142 };
  143 
  144 int
  145 uftdi_match(struct device *parent, void *match, void *aux)
  146 {
  147         struct usb_attach_arg *uaa = aux;
  148 
  149         if (uaa->iface != NULL) {
  150                 if (uaa->vendor == USB_VENDOR_FTDI &&
  151                     (uaa->product == USB_PRODUCT_FTDI_SERIAL_2232C))
  152                         return (UMATCH_VENDOR_IFACESUBCLASS);
  153                 return (UMATCH_NONE);
  154         }
  155 
  156         DPRINTFN(20,("uftdi: vendor=0x%x, product=0x%x\n",
  157                      uaa->vendor, uaa->product));
  158 
  159         if (uaa->vendor == USB_VENDOR_FTDI &&
  160             (uaa->product == USB_PRODUCT_FTDI_SERIAL_8U100AX ||
  161              uaa->product == USB_PRODUCT_FTDI_SERIAL_8U232AM ||
  162              uaa->product == USB_PRODUCT_FTDI_SERIAL_232BM ||
  163              uaa->product == USB_PRODUCT_FTDI_SEMC_DSS20 ||
  164              uaa->product == USB_PRODUCT_FTDI_MHAM_KW ||
  165              uaa->product == USB_PRODUCT_FTDI_MHAM_YS ||
  166              uaa->product == USB_PRODUCT_FTDI_MHAM_Y6 ||
  167              uaa->product == USB_PRODUCT_FTDI_MHAM_Y8 ||
  168              uaa->product == USB_PRODUCT_FTDI_MHAM_IC ||
  169              uaa->product == USB_PRODUCT_FTDI_MHAM_DB9 ||
  170              uaa->product == USB_PRODUCT_FTDI_MHAM_RS232 ||
  171              uaa->product == USB_PRODUCT_FTDI_MHAM_Y9 ||
  172              uaa->product == USB_PRODUCT_FTDI_COASTAL_TNCX ||
  173              uaa->product == USB_PRODUCT_FTDI_LCD_LK202_24 ||
  174              uaa->product == USB_PRODUCT_FTDI_LCD_LK204_24 ||
  175              uaa->product == USB_PRODUCT_FTDI_LCD_MX200 ||
  176              uaa->product == USB_PRODUCT_FTDI_LCD_CFA_631 ||
  177              uaa->product == USB_PRODUCT_FTDI_LCD_CFA_632 ||
  178              uaa->product == USB_PRODUCT_FTDI_LCD_CFA_633 ||
  179              uaa->product == USB_PRODUCT_FTDI_LCD_CFA_634 ||
  180              uaa->product == USB_PRODUCT_FTDI_MJS_SIRIUS_PC))
  181                 return (UMATCH_VENDOR_PRODUCT);
  182         if (uaa->vendor == USB_VENDOR_SIIG2 &&
  183             (uaa->product == USB_PRODUCT_SIIG2_US2308))
  184                 return (UMATCH_VENDOR_PRODUCT);
  185         if (uaa->vendor == USB_VENDOR_INTREPIDCS &&
  186             (uaa->product == USB_PRODUCT_INTREPIDCS_VALUECAN ||
  187              uaa->product == USB_PRODUCT_INTREPIDCS_NEOVI))
  188                 return (UMATCH_VENDOR_PRODUCT);
  189         if (uaa->vendor == USB_VENDOR_BBELECTRONICS &&
  190             (uaa->product == USB_PRODUCT_BBELECTRONICS_USOTL4))
  191                 return (UMATCH_VENDOR_PRODUCT);
  192         if (uaa->vendor == USB_VENDOR_FALCOM &&
  193             (uaa->product == USB_PRODUCT_FALCOM_TWIST ||
  194              uaa->product == USB_PRODUCT_FALCOM_SAMBA))
  195                  return (UMATCH_VENDOR_PRODUCT);
  196         if (uaa->vendor == USB_VENDOR_SEALEVEL &&
  197             uaa->product == USB_PRODUCT_SEALEVEL_USBSERIAL)
  198                 return (UMATCH_VENDOR_PRODUCT);
  199 
  200         return (UMATCH_NONE);
  201 }
  202 
  203 void
  204 uftdi_attach(struct device *parent, struct device *self, void *aux)
  205 {
  206         struct uftdi_softc *sc = (struct uftdi_softc *)self;
  207         struct usb_attach_arg *uaa = aux;
  208         usbd_device_handle dev = uaa->device;
  209         usbd_interface_handle iface;
  210         usb_interface_descriptor_t *id;
  211         usb_endpoint_descriptor_t *ed;
  212         char *devinfop;
  213         char *devname = sc->sc_dev.dv_xname;
  214         int i;
  215         usbd_status err;
  216         struct ucom_attach_args uca;
  217 
  218         DPRINTFN(10,("\nuftdi_attach: sc=%p\n", sc));
  219 
  220         if (uaa->iface == NULL) {
  221                 /* Move the device into the configured state. */
  222                 err = usbd_set_config_index(dev, UFTDI_CONFIG_INDEX, 1);
  223                 if (err) {
  224                         printf("\n%s: failed to set configuration, err=%s\n",
  225                                devname, usbd_errstr(err));
  226                         goto bad;
  227                 }
  228 
  229                 err = usbd_device2interface_handle(dev, UFTDI_IFACE_INDEX, &iface);
  230                 if (err) {
  231                         printf("\n%s: failed to get interface, err=%s\n",
  232                                devname, usbd_errstr(err));
  233                         goto bad;
  234                 }
  235         } else
  236                 iface = uaa->iface;
  237 
  238         devinfop = usbd_devinfo_alloc(dev, 0);
  239         printf("\n%s: %s\n", devname, devinfop);
  240         usbd_devinfo_free(devinfop);
  241 
  242         id = usbd_get_interface_descriptor(iface);
  243 
  244         sc->sc_udev = dev;
  245         sc->sc_iface = iface;
  246 
  247         switch (uaa->vendor) {
  248         case USB_VENDOR_FTDI:
  249                 switch (uaa->product) {
  250                 case USB_PRODUCT_FTDI_SERIAL_8U100AX:
  251                         sc->sc_type = UFTDI_TYPE_SIO;
  252                         sc->sc_hdrlen = 1;
  253                         break;
  254 
  255                 case USB_PRODUCT_FTDI_SEMC_DSS20:
  256                 case USB_PRODUCT_FTDI_SERIAL_8U232AM:
  257                 case USB_PRODUCT_FTDI_SERIAL_2232C:
  258                 case USB_PRODUCT_FTDI_SERIAL_232BM:
  259                 case USB_PRODUCT_FTDI_COASTAL_TNCX:
  260                 case USB_PRODUCT_FTDI_LCD_LK202_24:
  261                 case USB_PRODUCT_FTDI_LCD_LK204_24:
  262                 case USB_PRODUCT_FTDI_LCD_MX200:
  263                 case USB_PRODUCT_FTDI_LCD_CFA_631:
  264                 case USB_PRODUCT_FTDI_LCD_CFA_632:
  265                 case USB_PRODUCT_FTDI_LCD_CFA_633:
  266                 case USB_PRODUCT_FTDI_LCD_CFA_634:
  267                 case USB_PRODUCT_FTDI_MHAM_KW:
  268                 case USB_PRODUCT_FTDI_MHAM_YS:
  269                 case USB_PRODUCT_FTDI_MHAM_Y6:
  270                 case USB_PRODUCT_FTDI_MHAM_Y8:
  271                 case USB_PRODUCT_FTDI_MHAM_IC:
  272                 case USB_PRODUCT_FTDI_MHAM_DB9:
  273                 case USB_PRODUCT_FTDI_MHAM_RS232:
  274                 case USB_PRODUCT_FTDI_MHAM_Y9:
  275                 case USB_PRODUCT_SEALEVEL_USBSERIAL:
  276                 case USB_PRODUCT_FTDI_MJS_SIRIUS_PC:
  277                         sc->sc_type = UFTDI_TYPE_8U232AM;
  278                         sc->sc_hdrlen = 0;
  279                         break;
  280                 
  281                 default:                /* Can't happen */
  282                         goto bad;
  283                 }
  284                 break;
  285 
  286         case USB_VENDOR_INTREPIDCS:
  287                 switch (uaa->product) {
  288                 case USB_PRODUCT_INTREPIDCS_VALUECAN:
  289                 case USB_PRODUCT_INTREPIDCS_NEOVI:
  290                 sc->sc_type = UFTDI_TYPE_8U232AM;
  291                         sc->sc_hdrlen = 0;
  292                         break;
  293 
  294                 default:                /* Can't happen */
  295                         goto bad;
  296                 }
  297                 break;
  298 
  299         case USB_VENDOR_SIIG2:
  300                 switch (uaa->product) {
  301                 case USB_PRODUCT_SIIG2_US2308:
  302                         sc->sc_type = UFTDI_TYPE_8U232AM;
  303                         sc->sc_hdrlen = 0;
  304                         break;
  305 
  306                 default:                /* Can't happen */
  307                         goto bad;
  308                 }
  309                 break;
  310 
  311         case USB_VENDOR_BBELECTRONICS:
  312                 switch( uaa->product ){
  313                 case USB_PRODUCT_BBELECTRONICS_USOTL4:
  314                         sc->sc_type = UFTDI_TYPE_8U232AM;
  315                         sc->sc_hdrlen = 0;
  316                         break;
  317                 default:                /* Can't happen */
  318                         goto bad;
  319                 }
  320                 break;
  321 
  322         case USB_VENDOR_FALCOM:
  323                 switch( uaa->product ){
  324                 case USB_PRODUCT_FALCOM_TWIST:
  325                 case USB_PRODUCT_FALCOM_SAMBA:
  326                         sc->sc_type = UFTDI_TYPE_8U232AM;
  327                         sc->sc_hdrlen = 0;
  328                         break;
  329                 default:                /* Can't happen */
  330                         goto bad;
  331                 }
  332                 break;
  333         }               
  334 
  335 
  336         uca.bulkin = uca.bulkout = -1;
  337         for (i = 0; i < id->bNumEndpoints; i++) {
  338                 int addr, dir, attr;
  339                 ed = usbd_interface2endpoint_descriptor(iface, i);
  340                 if (ed == NULL) {
  341                         printf("%s: could not read endpoint descriptor\n",
  342                             devname);
  343                         goto bad;
  344                 }
  345 
  346                 addr = ed->bEndpointAddress;
  347                 dir = UE_GET_DIR(ed->bEndpointAddress);
  348                 attr = ed->bmAttributes & UE_XFERTYPE;
  349                 if (dir == UE_DIR_IN && attr == UE_BULK)
  350                         uca.bulkin = addr;
  351                 else if (dir == UE_DIR_OUT && attr == UE_BULK)
  352                         uca.bulkout = addr;
  353                 else {
  354                         printf("%s: unexpected endpoint\n", devname);
  355                         goto bad;
  356                 }
  357         }
  358         if (uca.bulkin == -1) {
  359                 printf("%s: Could not find data bulk in\n",
  360                        sc->sc_dev.dv_xname);
  361                 goto bad;
  362         }
  363         if (uca.bulkout == -1) {
  364                 printf("%s: Could not find data bulk out\n",
  365                        sc->sc_dev.dv_xname);
  366                 goto bad;
  367         }
  368 
  369         if (uaa->iface == NULL)
  370                 uca.portno = FTDI_PIT_SIOA;
  371         else
  372                 uca.portno = FTDI_PIT_SIOA + id->bInterfaceNumber;
  373         /* bulkin, bulkout set above */
  374         uca.ibufsize = UFTDIIBUFSIZE;
  375         uca.obufsize = UFTDIOBUFSIZE - sc->sc_hdrlen;
  376         uca.ibufsizepad = UFTDIIBUFSIZE;
  377         uca.opkthdrlen = sc->sc_hdrlen;
  378         uca.device = dev;
  379         uca.iface = iface;
  380         uca.methods = &uftdi_methods;
  381         uca.arg = sc;
  382         uca.info = NULL;
  383 
  384         usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev,
  385                            &sc->sc_dev);
  386 
  387         DPRINTF(("uftdi: in=0x%x out=0x%x\n", uca.bulkin, uca.bulkout));
  388         sc->sc_subdev = config_found_sm(self, &uca, ucomprint, ucomsubmatch);
  389 
  390         return;
  391 
  392 bad:
  393         DPRINTF(("uftdi_attach: ATTACH ERROR\n"));
  394         sc->sc_dying = 1;
  395 }
  396 
  397 int
  398 uftdi_activate(struct device *self, enum devact act)
  399 {
  400         struct uftdi_softc *sc = (struct uftdi_softc *)self;
  401         int rv = 0;
  402 
  403         switch (act) {
  404         case DVACT_ACTIVATE:
  405                 break;
  406 
  407         case DVACT_DEACTIVATE:
  408                 if (sc->sc_subdev != NULL)
  409                         rv = config_deactivate(sc->sc_subdev);
  410                 sc->sc_dying = 1;
  411                 break;
  412         }
  413         return (rv);
  414 }
  415 
  416 int
  417 uftdi_detach(struct device *self, int flags)
  418 {
  419         struct uftdi_softc *sc = (struct uftdi_softc *)self;
  420 
  421         DPRINTF(("uftdi_detach: sc=%p flags=%d\n", sc, flags));
  422         sc->sc_dying = 1;
  423         if (sc->sc_subdev != NULL) {
  424                 config_detach(sc->sc_subdev, flags);
  425                 sc->sc_subdev = NULL;
  426         }
  427 
  428         usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev,
  429                            &sc->sc_dev);
  430 
  431         return (0);
  432 }
  433 
  434 int
  435 uftdi_open(void *vsc, int portno)
  436 {
  437         struct uftdi_softc *sc = vsc;
  438         usb_device_request_t req;
  439         usbd_status err;
  440         struct termios t;
  441 
  442         DPRINTF(("uftdi_open: sc=%p\n", sc));
  443 
  444         if (sc->sc_dying)
  445                 return (EIO);
  446 
  447         /* Perform a full reset on the device */
  448         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
  449         req.bRequest = FTDI_SIO_RESET;
  450         USETW(req.wValue, FTDI_SIO_RESET_SIO);
  451         USETW(req.wIndex, portno);
  452         USETW(req.wLength, 0);
  453         err = usbd_do_request(sc->sc_udev, &req, NULL);
  454         if (err)
  455                 return (EIO);
  456 
  457         /* Set 9600 baud, 2 stop bits, no parity, 8 bits */
  458         t.c_ospeed = 9600;
  459         t.c_cflag = CSTOPB | CS8;
  460         (void)uftdi_param(sc, portno, &t);
  461 
  462         /* Turn on RTS/CTS flow control */
  463         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
  464         req.bRequest = FTDI_SIO_SET_FLOW_CTRL;
  465         USETW(req.wValue, 0);
  466         USETW2(req.wIndex, FTDI_SIO_RTS_CTS_HS, portno);
  467         USETW(req.wLength, 0);
  468         err = usbd_do_request(sc->sc_udev, &req, NULL);
  469         if (err)
  470                 return (EIO);
  471 
  472         return (0);
  473 }
  474 
  475 void
  476 uftdi_read(void *vsc, int portno, u_char **ptr, u_int32_t *count)
  477 {
  478         struct uftdi_softc *sc = vsc;
  479         u_char msr, lsr;
  480 
  481         DPRINTFN(15,("uftdi_read: sc=%p, port=%d count=%d\n", sc, portno,
  482                      *count));
  483 
  484         msr = FTDI_GET_MSR(*ptr);
  485         lsr = FTDI_GET_LSR(*ptr);
  486 
  487 #ifdef UFTDI_DEBUG
  488         if (*count != 2)
  489                 DPRINTFN(10,("uftdi_read: sc=%p, port=%d count=%d data[0]="
  490                             "0x%02x\n", sc, portno, *count, (*ptr)[2]));
  491 #endif
  492 
  493         if (sc->sc_msr != msr ||
  494             (sc->sc_lsr & FTDI_LSR_MASK) != (lsr & FTDI_LSR_MASK)) {
  495                 DPRINTF(("uftdi_read: status change msr=0x%02x(0x%02x) "
  496                          "lsr=0x%02x(0x%02x)\n", msr, sc->sc_msr,
  497                          lsr, sc->sc_lsr));
  498                 sc->sc_msr = msr;
  499                 sc->sc_lsr = lsr;
  500                 ucom_status_change((struct ucom_softc *)sc->sc_subdev);
  501         }
  502 
  503         /* Pick up status and adjust data part. */
  504         *ptr += 2;
  505         *count -= 2;
  506 }
  507 
  508 void
  509 uftdi_write(void *vsc, int portno, u_char *to, u_char *from, u_int32_t *count)
  510 {
  511         struct uftdi_softc *sc = vsc;
  512 
  513         DPRINTFN(10,("uftdi_write: sc=%p, port=%d count=%u data[0]=0x%02x\n",
  514                      vsc, portno, *count, from[0]));
  515 
  516         /* Make length tag and copy data */
  517         if (sc->sc_hdrlen > 0)
  518                 *to = FTDI_OUT_TAG(*count, portno);
  519 
  520         memcpy(to + sc->sc_hdrlen, from, *count);
  521         *count += sc->sc_hdrlen;
  522 }
  523 
  524 void
  525 uftdi_set(void *vsc, int portno, int reg, int onoff)
  526 {
  527         struct uftdi_softc *sc = vsc;
  528         usb_device_request_t req;
  529         int ctl;
  530 
  531         DPRINTF(("uftdi_set: sc=%p, port=%d reg=%d onoff=%d\n", vsc, portno,
  532                  reg, onoff));
  533 
  534         switch (reg) {
  535         case UCOM_SET_DTR:
  536                 ctl = onoff ? FTDI_SIO_SET_DTR_HIGH : FTDI_SIO_SET_DTR_LOW;
  537                 break;
  538         case UCOM_SET_RTS:
  539                 ctl = onoff ? FTDI_SIO_SET_RTS_HIGH : FTDI_SIO_SET_RTS_LOW;
  540                 break;
  541         case UCOM_SET_BREAK:
  542                 uftdi_break(sc, portno, onoff);
  543                 return;
  544         default:
  545                 return;
  546         }
  547         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
  548         req.bRequest = FTDI_SIO_MODEM_CTRL;
  549         USETW(req.wValue, ctl);
  550         USETW(req.wIndex, portno);
  551         USETW(req.wLength, 0);
  552         DPRINTFN(2,("uftdi_set: reqtype=0x%02x req=0x%02x value=0x%04x "
  553                     "index=0x%04x len=%d\n", req.bmRequestType, req.bRequest,
  554                     UGETW(req.wValue), UGETW(req.wIndex), UGETW(req.wLength)));
  555         (void)usbd_do_request(sc->sc_udev, &req, NULL);
  556 }
  557 
  558 int
  559 uftdi_param(void *vsc, int portno, struct termios *t)
  560 {
  561         struct uftdi_softc *sc = vsc;
  562         usb_device_request_t req;
  563         usbd_status err;
  564         int rate, data, flow;
  565 
  566         DPRINTF(("uftdi_param: sc=%p\n", sc));
  567 
  568         if (sc->sc_dying)
  569                 return (EIO);
  570 
  571         switch (sc->sc_type) {
  572         case UFTDI_TYPE_SIO:
  573                 switch (t->c_ospeed) {
  574                 case 300: rate = ftdi_sio_b300; break;
  575                 case 600: rate = ftdi_sio_b600; break;
  576                 case 1200: rate = ftdi_sio_b1200; break;
  577                 case 2400: rate = ftdi_sio_b2400; break;
  578                 case 4800: rate = ftdi_sio_b4800; break;
  579                 case 9600: rate = ftdi_sio_b9600; break;
  580                 case 19200: rate = ftdi_sio_b19200; break;
  581                 case 38400: rate = ftdi_sio_b38400; break;
  582                 case 57600: rate = ftdi_sio_b57600; break;
  583                 case 115200: rate = ftdi_sio_b115200; break;
  584                 default:
  585                         return (EINVAL);
  586                 }
  587                 break;
  588 
  589         case UFTDI_TYPE_8U232AM:
  590                 if (uftdi_8u232am_getrate(t->c_ospeed, &rate) == -1)
  591                         return (EINVAL);
  592                 break;
  593         }
  594         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
  595         req.bRequest = FTDI_SIO_SET_BAUD_RATE;
  596         USETW(req.wValue, rate);
  597         USETW(req.wIndex, portno);
  598         USETW(req.wLength, 0);
  599         DPRINTFN(2,("uftdi_param: reqtype=0x%02x req=0x%02x value=0x%04x "
  600                     "index=0x%04x len=%d\n", req.bmRequestType, req.bRequest,
  601                     UGETW(req.wValue), UGETW(req.wIndex), UGETW(req.wLength)));
  602         err = usbd_do_request(sc->sc_udev, &req, NULL);
  603         if (err)
  604                 return (EIO);
  605 
  606         if (ISSET(t->c_cflag, CSTOPB))
  607                 data = FTDI_SIO_SET_DATA_STOP_BITS_2;
  608         else
  609                 data = FTDI_SIO_SET_DATA_STOP_BITS_1;
  610         if (ISSET(t->c_cflag, PARENB)) {
  611                 if (ISSET(t->c_cflag, PARODD))
  612                         data |= FTDI_SIO_SET_DATA_PARITY_ODD;
  613                 else
  614                         data |= FTDI_SIO_SET_DATA_PARITY_EVEN;
  615         } else
  616                 data |= FTDI_SIO_SET_DATA_PARITY_NONE;
  617         switch (ISSET(t->c_cflag, CSIZE)) {
  618         case CS5:
  619                 data |= FTDI_SIO_SET_DATA_BITS(5);
  620                 break;
  621         case CS6:
  622                 data |= FTDI_SIO_SET_DATA_BITS(6);
  623                 break;
  624         case CS7:
  625                 data |= FTDI_SIO_SET_DATA_BITS(7);
  626                 break;
  627         case CS8:
  628                 data |= FTDI_SIO_SET_DATA_BITS(8);
  629                 break;
  630         }
  631         sc->last_lcr = data;
  632 
  633         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
  634         req.bRequest = FTDI_SIO_SET_DATA;
  635         USETW(req.wValue, data);
  636         USETW(req.wIndex, portno);
  637         USETW(req.wLength, 0);
  638         DPRINTFN(2,("uftdi_param: reqtype=0x%02x req=0x%02x value=0x%04x "
  639                     "index=0x%04x len=%d\n", req.bmRequestType, req.bRequest,
  640                     UGETW(req.wValue), UGETW(req.wIndex), UGETW(req.wLength)));
  641         err = usbd_do_request(sc->sc_udev, &req, NULL);
  642         if (err)
  643                 return (EIO);
  644 
  645         if (ISSET(t->c_cflag, CRTSCTS)) {
  646                 flow = FTDI_SIO_RTS_CTS_HS;
  647                 USETW(req.wValue, 0);
  648         } else if (ISSET(t->c_iflag, IXON|IXOFF)) {
  649                 flow = FTDI_SIO_XON_XOFF_HS;
  650                 USETW2(req.wValue, t->c_cc[VSTOP], t->c_cc[VSTART]);
  651         } else {
  652                 flow = FTDI_SIO_DISABLE_FLOW_CTRL;
  653                 USETW(req.wValue, 0);
  654         }
  655         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
  656         req.bRequest = FTDI_SIO_SET_FLOW_CTRL;
  657         USETW2(req.wIndex, flow, portno);
  658         USETW(req.wLength, 0);
  659         err = usbd_do_request(sc->sc_udev, &req, NULL);
  660         if (err)
  661                 return (EIO);
  662 
  663         return (0);
  664 }
  665 
  666 void
  667 uftdi_get_status(void *vsc, int portno, u_char *lsr, u_char *msr)
  668 {
  669         struct uftdi_softc *sc = vsc;
  670 
  671         DPRINTF(("uftdi_status: msr=0x%02x lsr=0x%02x\n",
  672                  sc->sc_msr, sc->sc_lsr));
  673 
  674         if (msr != NULL)
  675                 *msr = sc->sc_msr;
  676         if (lsr != NULL)
  677                 *lsr = sc->sc_lsr;
  678 }
  679 
  680 void
  681 uftdi_break(void *vsc, int portno, int onoff)
  682 {
  683         struct uftdi_softc *sc = vsc;
  684         usb_device_request_t req;
  685         int data;
  686 
  687         DPRINTF(("uftdi_break: sc=%p, port=%d onoff=%d\n", vsc, portno,
  688                   onoff));
  689 
  690         if (onoff) {
  691                 data = sc->last_lcr | FTDI_SIO_SET_BREAK;
  692         } else {
  693                 data = sc->last_lcr;
  694         }
  695 
  696         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
  697         req.bRequest = FTDI_SIO_SET_DATA;
  698         USETW(req.wValue, data);
  699         USETW(req.wIndex, portno);
  700         USETW(req.wLength, 0);
  701         (void)usbd_do_request(sc->sc_udev, &req, NULL);
  702 }
  703 
  704 int
  705 uftdi_8u232am_getrate(speed_t speed, int *rate)
  706 {
  707         /* Table of the nearest even powers-of-2 for values 0..15. */
  708         static const unsigned char roundoff[16] = {
  709                 0, 2, 2, 4,  4,  4,  8,  8,
  710                 8, 8, 8, 8, 16, 16, 16, 16,
  711         };
  712 
  713         unsigned int d, freq;
  714         int result;
  715 
  716         if (speed <= 0)
  717                 return (-1);
  718 
  719         /* Special cases for 2M and 3M. */
  720         if (speed >= 3000000 * 100 / 103 &&
  721             speed <= 3000000 * 100 / 97) {
  722                 result = 0;
  723                 goto done;
  724         }
  725         if (speed >= 2000000 * 100 / 103 &&
  726             speed <= 2000000 * 100 / 97) {
  727                 result = 1;
  728                 goto done;
  729         }
  730 
  731         d = (FTDI_8U232AM_FREQ << 4) / speed;
  732         d = (d & ~15) + roundoff[d & 15];
  733 
  734         if (d < FTDI_8U232AM_MIN_DIV)
  735                 d = FTDI_8U232AM_MIN_DIV;
  736         else if (d > FTDI_8U232AM_MAX_DIV)
  737                 d = FTDI_8U232AM_MAX_DIV;
  738 
  739         /* 
  740          * Calculate the frequency needed for d to exactly divide down
  741          * to our target speed, and check that the actual frequency is
  742          * within 3% of this.
  743          */
  744         freq = speed * d;
  745         if (freq < (quad_t)(FTDI_8U232AM_FREQ << 4) * 100 / 103 ||
  746             freq > (quad_t)(FTDI_8U232AM_FREQ << 4) * 100 / 97)
  747                 return (-1);
  748 
  749         /* 
  750          * Pack the divisor into the resultant value.  The lower
  751          * 14-bits hold the integral part, while the upper 2 bits
  752          * encode the fractional component: either 0, 0.5, 0.25, or
  753          * 0.125.
  754          */
  755         result = d >> 4;
  756         if (d & 8)
  757                 result |= 0x4000;
  758         else if (d & 4)
  759                 result |= 0x8000;
  760         else if (d & 2)
  761                 result |= 0xc000;
  762 
  763 done:
  764         *rate = result;
  765         return (0);
  766 }

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