sys/bus/u4b/serial/uftdi.c

   1 /*      $NetBSD: uftdi.c,v 1.13 2002/09/23 05:51:23 simonb Exp $        */
   2
   3 /*-
   4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Lennart Augustsson (lennart@augustsson.net).
   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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * NOTE: all function names beginning like "uftdi_cfg_" can only
  34  * be called from within the config thread function !
  35  */
  36
  37 /*
  38  * FTDI FT8U100AX serial adapter driver
  39  */
  40
  41 #include <sys/stdint.h>
  42 #include <sys/param.h>
  43 #include <sys/queue.h>
  44 #include <sys/types.h>
  45 #include <sys/systm.h>
  46 #include <sys/kernel.h>
  47 #include <sys/bus.h>
  48 #include <sys/module.h>
  49 #include <sys/lock.h>
  50 #include <sys/condvar.h>
  51 #include <sys/sysctl.h>
  52 #include <sys/unistd.h>
  53 #include <sys/callout.h>
  54 #include <sys/malloc.h>
  55 #include <sys/priv.h>
  56
  57 #include <bus/u4b/usb.h>
  58 #include <bus/u4b/usbdi.h>
  59 #include <bus/u4b/usbdi_util.h>
  60 #include <bus/u4b/usbdevs.h>
  61
  62 #define USB_DEBUG_VAR uftdi_debug
  63 #include <bus/u4b/usb_debug.h>
  64 #include <bus/u4b/usb_process.h>
  65
  66 #include <bus/u4b/serial/usb_serial.h>
  67 #include <bus/u4b/serial/uftdi_reg.h>
  68
  69 #ifdef USB_DEBUG
  70 static int uftdi_debug = 0;
  71
  72 static SYSCTL_NODE(_hw_usb, OID_AUTO, uftdi, CTLFLAG_RW, 0, "USB uftdi");
  73 SYSCTL_INT(_hw_usb_uftdi, OID_AUTO, debug, CTLFLAG_RW,
  74     &uftdi_debug, 0, "Debug level");
  75 #endif
  76
  77 #define UFTDI_CONFIG_INDEX      0
  78 #define UFTDI_IFACE_INDEX       0
  79
  80 #define UFTDI_OBUFSIZE 64               /* bytes, cannot be increased due to
  81                                          * do size encoding */
  82
  83 enum {
  84         UFTDI_BULK_DT_WR,
  85         UFTDI_BULK_DT_RD,
  86         UFTDI_N_TRANSFER,
  87 };
  88
  89 struct uftdi_softc {
  90         struct ucom_super_softc sc_super_ucom;
  91         struct ucom_softc sc_ucom;
  92
  93         struct usb_device *sc_udev;
  94         struct usb_xfer *sc_xfer[UFTDI_N_TRANSFER];
  95         device_t sc_dev;
  96         struct lock sc_lock;
  97
  98         uint32_t sc_unit;
  99         enum uftdi_type sc_type;
 100
 101         uint16_t sc_last_lcr;
 102
 103         uint8_t sc_iface_index;
 104         uint8_t sc_hdrlen;
 105         uint8_t sc_msr;
 106         uint8_t sc_lsr;
 107
 108         uint8_t sc_name[16];
 109 };
 110
 111 struct uftdi_param_config {
 112         uint16_t rate;
 113         uint16_t lcr;
 114         uint8_t v_start;
 115         uint8_t v_stop;
 116         uint8_t v_flow;
 117 };
 118
 119 /* prototypes */
 120
 121 static device_probe_t uftdi_probe;
 122 static device_attach_t uftdi_attach;
 123 static device_detach_t uftdi_detach;
 124
 125 static usb_callback_t uftdi_write_callback;
 126 static usb_callback_t uftdi_read_callback;
 127
 128 static void     uftdi_cfg_open(struct ucom_softc *);
 129 static void     uftdi_cfg_set_dtr(struct ucom_softc *, uint8_t);
 130 static void     uftdi_cfg_set_rts(struct ucom_softc *, uint8_t);
 131 static void     uftdi_cfg_set_break(struct ucom_softc *, uint8_t);
 132 static int      uftdi_set_parm_soft(struct termios *,
 133                     struct uftdi_param_config *, uint8_t);
 134 static int      uftdi_pre_param(struct ucom_softc *, struct termios *);
 135 static void     uftdi_cfg_param(struct ucom_softc *, struct termios *);
 136 static void     uftdi_cfg_get_status(struct ucom_softc *, uint8_t *,
 137                     uint8_t *);
 138 static void     uftdi_start_read(struct ucom_softc *);
 139 static void     uftdi_stop_read(struct ucom_softc *);
 140 static void     uftdi_start_write(struct ucom_softc *);
 141 static void     uftdi_stop_write(struct ucom_softc *);
 142 static uint8_t  uftdi_8u232am_getrate(uint32_t, uint16_t *);
 143 static void     uftdi_poll(struct ucom_softc *ucom);
 144
 145 static const struct usb_config uftdi_config[UFTDI_N_TRANSFER] = {
 146
 147         [UFTDI_BULK_DT_WR] = {
 148                 .type = UE_BULK,
 149                 .endpoint = UE_ADDR_ANY,
 150                 .direction = UE_DIR_OUT,
 151                 .bufsize = UFTDI_OBUFSIZE,
 152                 .flags = {.pipe_bof = 1,},
 153                 .callback = &uftdi_write_callback,
 154         },
 155
 156         [UFTDI_BULK_DT_RD] = {
 157                 .type = UE_BULK,
 158                 .endpoint = UE_ADDR_ANY,
 159                 .direction = UE_DIR_IN,
 160                 .bufsize = 0,           /* use wMaxPacketSize */
 161                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,},
 162                 .callback = &uftdi_read_callback,
 163         },
 164 };
 165
 166 static const struct ucom_callback uftdi_callback = {
 167         .ucom_cfg_get_status = &uftdi_cfg_get_status,
 168         .ucom_cfg_set_dtr = &uftdi_cfg_set_dtr,
 169         .ucom_cfg_set_rts = &uftdi_cfg_set_rts,
 170         .ucom_cfg_set_break = &uftdi_cfg_set_break,
 171         .ucom_cfg_param = &uftdi_cfg_param,
 172         .ucom_cfg_open = &uftdi_cfg_open,
 173         .ucom_pre_param = &uftdi_pre_param,
 174         .ucom_start_read = &uftdi_start_read,
 175         .ucom_stop_read = &uftdi_stop_read,
 176         .ucom_start_write = &uftdi_start_write,
 177         .ucom_stop_write = &uftdi_stop_write,
 178         .ucom_poll = &uftdi_poll,
 179 };
 180
 181 static device_method_t uftdi_methods[] = {
 182         /* Device interface */
 183         DEVMETHOD(device_probe, uftdi_probe),
 184         DEVMETHOD(device_attach, uftdi_attach),
 185         DEVMETHOD(device_detach, uftdi_detach),
 186
 187         {0, 0}
 188 };
 189
 190 static devclass_t uftdi_devclass;
 191
 192 static driver_t uftdi_driver = {
 193         .name = "uftdi",
 194         .methods = uftdi_methods,
 195         .size = sizeof(struct uftdi_softc),
 196 };
 197
 198 DRIVER_MODULE(uftdi, uhub, uftdi_driver, uftdi_devclass, NULL, 0);
 199 MODULE_DEPEND(uftdi, ucom, 1, 1, 1);
 200 MODULE_DEPEND(uftdi, usb, 1, 1, 1);
 201 MODULE_VERSION(uftdi, 1);
 202
 203 static STRUCT_USB_HOST_ID uftdi_devs[] = {
 204 #define UFTDI_DEV(v,p,t) \
 205   { USB_VPI(USB_VENDOR_##v, USB_PRODUCT_##v##_##p, UFTDI_TYPE_##t) }
 206         UFTDI_DEV(ATMEL, STK541, 8U232AM),
 207         UFTDI_DEV(DRESDENELEKTRONIK, SENSORTERMINALBOARD, 8U232AM),
 208         UFTDI_DEV(DRESDENELEKTRONIK, WIRELESSHANDHELDTERMINAL, 8U232AM),
 209         UFTDI_DEV(FALCOM, TWIST, 8U232AM),
 210         UFTDI_DEV(FTDI, GAMMASCOUT, 8U232AM),
 211         UFTDI_DEV(FTDI, SERIAL_8U100AX, SIO),
 212         UFTDI_DEV(FTDI, SERIAL_2232C, 8U232AM),
 213         UFTDI_DEV(FTDI, SERIAL_2232D, 8U232AM),
 214         UFTDI_DEV(FTDI, BEAGLEBONE, 8U232AM),
 215         UFTDI_DEV(FTDI, SERIAL_4232H, 8U232AM),
 216         UFTDI_DEV(FTDI, SERIAL_8U232AM, 8U232AM),
 217         UFTDI_DEV(FTDI, SERIAL_8U232AM4, 8U232AM),
 218         UFTDI_DEV(FTDI, SEMC_DSS20, 8U232AM),
 219         UFTDI_DEV(FTDI, CFA_631, 8U232AM),
 220         UFTDI_DEV(FTDI, CFA_632, 8U232AM),
 221         UFTDI_DEV(FTDI, CFA_633, 8U232AM),
 222         UFTDI_DEV(FTDI, CFA_634, 8U232AM),
 223         UFTDI_DEV(FTDI, CFA_635, 8U232AM),
 224         UFTDI_DEV(FTDI, USB_UIRT, 8U232AM),
 225         UFTDI_DEV(FTDI, USBSERIAL, 8U232AM),
 226         UFTDI_DEV(FTDI, KBS, 8U232AM),
 227         UFTDI_DEV(FTDI, MX2_3, 8U232AM),
 228         UFTDI_DEV(FTDI, MX4_5, 8U232AM),
 229         UFTDI_DEV(FTDI, LK202, 8U232AM),
 230         UFTDI_DEV(FTDI, LK204, 8U232AM),
 231         UFTDI_DEV(FTDI, TACTRIX_OPENPORT_13M, 8U232AM),
 232         UFTDI_DEV(FTDI, TACTRIX_OPENPORT_13S, 8U232AM),
 233         UFTDI_DEV(FTDI, TACTRIX_OPENPORT_13U, 8U232AM),
 234         UFTDI_DEV(FTDI, EISCOU, 8U232AM),
 235         UFTDI_DEV(FTDI, UOPTBR, 8U232AM),
 236         UFTDI_DEV(FTDI, EMCU2D, 8U232AM),
 237         UFTDI_DEV(FTDI, PCMSFU, 8U232AM),
 238         UFTDI_DEV(FTDI, EMCU2H, 8U232AM),
 239         UFTDI_DEV(FTDI, MAXSTREAM, 8U232AM),
 240         UFTDI_DEV(FTDI, CTI_USB_NANO_485, 8U232AM),
 241         UFTDI_DEV(FTDI, CTI_USB_MINI_485, 8U232AM),
 242         UFTDI_DEV(SIIG2, US2308, 8U232AM),
 243         UFTDI_DEV(INTREPIDCS, VALUECAN, 8U232AM),
 244         UFTDI_DEV(INTREPIDCS, NEOVI, 8U232AM),
 245         UFTDI_DEV(BBELECTRONICS, USOTL4, 8U232AM),
 246         UFTDI_DEV(MATRIXORBITAL, MOUA, 8U232AM),
 247         UFTDI_DEV(MARVELL, SHEEVAPLUG, 8U232AM),
 248         UFTDI_DEV(MELCO, PCOPRS1, 8U232AM),
 249         UFTDI_DEV(RATOC, REXUSB60F, 8U232AM),
 250 #undef UFTDI_DEV
 251 };
 252
 253 static int
 254 uftdi_probe(device_t dev)
 255 {
 256         struct usb_attach_arg *uaa = device_get_ivars(dev);
 257
 258         if (uaa->usb_mode != USB_MODE_HOST) {
 259                 return (ENXIO);
 260         }
 261         if (uaa->info.bConfigIndex != UFTDI_CONFIG_INDEX) {
 262                 return (ENXIO);
 263         }
 264         /* attach to all present interfaces */
 265
 266         return (usbd_lookup_id_by_uaa(uftdi_devs, sizeof(uftdi_devs), uaa));
 267 }
 268
 269 static int
 270 uftdi_attach(device_t dev)
 271 {
 272         struct usb_attach_arg *uaa = device_get_ivars(dev);
 273         struct uftdi_softc *sc = device_get_softc(dev);
 274         int error;
 275
 276         sc->sc_udev = uaa->device;
 277         sc->sc_dev = dev;
 278         sc->sc_unit = device_get_unit(dev);
 279
 280         device_set_usb_desc(dev);
 281         lockinit(&sc->sc_lock, "uftdi", 0, LK_CANRECURSE);
 282
 283         ksnprintf(sc->sc_name, sizeof(sc->sc_name),
 284             "%s", device_get_nameunit(dev));
 285
 286         DPRINTF("\n");
 287
 288         sc->sc_iface_index = uaa->info.bIfaceIndex;
 289         sc->sc_type = USB_GET_DRIVER_INFO(uaa);
 290
 291         switch (sc->sc_type) {
 292         case UFTDI_TYPE_SIO:
 293                 sc->sc_hdrlen = 1;
 294                 break;
 295         case UFTDI_TYPE_8U232AM:
 296         default:
 297                 sc->sc_hdrlen = 0;
 298                 break;
 299         }
 300
 301         error = usbd_transfer_setup(uaa->device,
 302             &sc->sc_iface_index, sc->sc_xfer, uftdi_config,
 303             UFTDI_N_TRANSFER, sc, &sc->sc_lock);
 304
 305         if (error) {
 306                 device_printf(dev, "allocating USB "
 307                     "transfers failed\n");
 308                 goto detach;
 309         }
 310         sc->sc_ucom.sc_portno = FTDI_PIT_SIOA + uaa->info.bIfaceNum;
 311
 312         /* clear stall at first run */
 313         lockmgr(&sc->sc_lock, LK_EXCLUSIVE);
 314         usbd_xfer_set_stall(sc->sc_xfer[UFTDI_BULK_DT_WR]);
 315         usbd_xfer_set_stall(sc->sc_xfer[UFTDI_BULK_DT_RD]);
 316         lockmgr(&sc->sc_lock, LK_RELEASE);
 317
 318         /* set a valid "lcr" value */
 319
 320         sc->sc_last_lcr =
 321             (FTDI_SIO_SET_DATA_STOP_BITS_2 |
 322             FTDI_SIO_SET_DATA_PARITY_NONE |
 323             FTDI_SIO_SET_DATA_BITS(8));
 324
 325         error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc,
 326             &uftdi_callback, &sc->sc_lock);
 327         if (error) {
 328                 goto detach;
 329         }
 330         ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev);
 331
 332         return (0);                     /* success */
 333
 334 detach:
 335         uftdi_detach(dev);
 336         return (ENXIO);
 337 }
 338
 339 static int
 340 uftdi_detach(device_t dev)
 341 {
 342         struct uftdi_softc *sc = device_get_softc(dev);
 343
 344         ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom);
 345         usbd_transfer_unsetup(sc->sc_xfer, UFTDI_N_TRANSFER);
 346         lockuninit(&sc->sc_lock);
 347
 348         return (0);
 349 }
 350
 351 static void
 352 uftdi_cfg_open(struct ucom_softc *ucom)
 353 {
 354         struct uftdi_softc *sc = ucom->sc_parent;
 355         uint16_t wIndex = ucom->sc_portno;
 356         struct usb_device_request req;
 357
 358         DPRINTF("");
 359
 360         /* perform a full reset on the device */
 361
 362         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 363         req.bRequest = FTDI_SIO_RESET;
 364         USETW(req.wValue, FTDI_SIO_RESET_SIO);
 365         USETW(req.wIndex, wIndex);
 366         USETW(req.wLength, 0);
 367         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 368             &req, NULL, 0, 1000);
 369
 370         /* turn on RTS/CTS flow control */
 371
 372         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 373         req.bRequest = FTDI_SIO_SET_FLOW_CTRL;
 374         USETW(req.wValue, 0);
 375         USETW2(req.wIndex, FTDI_SIO_RTS_CTS_HS, wIndex);
 376         USETW(req.wLength, 0);
 377         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 378             &req, NULL, 0, 1000);
 379
 380         /*
 381          * NOTE: with the new UCOM layer there will always be a
 382          * "uftdi_cfg_param()" call after "open()", so there is no need for
 383          * "open()" to configure anything
 384          */
 385 }
 386
 387 static void
 388 uftdi_write_callback(struct usb_xfer *xfer, usb_error_t error)
 389 {
 390         struct uftdi_softc *sc = usbd_xfer_softc(xfer);
 391         struct usb_page_cache *pc;
 392         uint32_t actlen;
 393         uint8_t buf[1];
 394
 395         switch (USB_GET_STATE(xfer)) {
 396         case USB_ST_SETUP:
 397         case USB_ST_TRANSFERRED:
 398 tr_setup:
 399                 pc = usbd_xfer_get_frame(xfer, 0);
 400                 if (ucom_get_data(&sc->sc_ucom, pc,
 401                     sc->sc_hdrlen, UFTDI_OBUFSIZE - sc->sc_hdrlen,
 402                     &actlen)) {
 403
 404                         if (sc->sc_hdrlen > 0) {
 405                                 buf[0] =
 406                                     FTDI_OUT_TAG(actlen, sc->sc_ucom.sc_portno);
 407                                 usbd_copy_in(pc, 0, buf, 1);
 408                         }
 409                         usbd_xfer_set_frame_len(xfer, 0, actlen + sc->sc_hdrlen);
 410                         usbd_transfer_submit(xfer);
 411                 }
 412                 return;
 413
 414         default:                        /* Error */
 415                 if (error != USB_ERR_CANCELLED) {
 416                         /* try to clear stall first */
 417                         usbd_xfer_set_stall(xfer);
 418                         goto tr_setup;
 419                 }
 420                 return;
 421         }
 422 }
 423
 424 static void
 425 uftdi_read_callback(struct usb_xfer *xfer, usb_error_t error)
 426 {
 427         struct uftdi_softc *sc = usbd_xfer_softc(xfer);
 428         struct usb_page_cache *pc;
 429         uint8_t buf[2];
 430         uint8_t ftdi_msr;
 431         uint8_t msr;
 432         uint8_t lsr;
 433         int actlen;
 434
 435         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 436
 437         switch (USB_GET_STATE(xfer)) {
 438         case USB_ST_TRANSFERRED:
 439
 440                 if (actlen < 2) {
 441                         goto tr_setup;
 442                 }
 443                 pc = usbd_xfer_get_frame(xfer, 0);
 444                 usbd_copy_out(pc, 0, buf, 2);
 445
 446                 ftdi_msr = FTDI_GET_MSR(buf);
 447                 lsr = FTDI_GET_LSR(buf);
 448
 449                 msr = 0;
 450                 if (ftdi_msr & FTDI_SIO_CTS_MASK)
 451                         msr |= SER_CTS;
 452                 if (ftdi_msr & FTDI_SIO_DSR_MASK)
 453                         msr |= SER_DSR;
 454                 if (ftdi_msr & FTDI_SIO_RI_MASK)
 455                         msr |= SER_RI;
 456                 if (ftdi_msr & FTDI_SIO_RLSD_MASK)
 457                         msr |= SER_DCD;
 458
 459                 if ((sc->sc_msr != msr) ||
 460                     ((sc->sc_lsr & FTDI_LSR_MASK) != (lsr & FTDI_LSR_MASK))) {
 461                         DPRINTF("status change msr=0x%02x (0x%02x) "
 462                             "lsr=0x%02x (0x%02x)\n", msr, sc->sc_msr,
 463                             lsr, sc->sc_lsr);
 464
 465                         sc->sc_msr = msr;
 466                         sc->sc_lsr = lsr;
 467
 468                         ucom_status_change(&sc->sc_ucom);
 469                 }
 470                 actlen -= 2;
 471
 472                 if (actlen > 0) {
 473                         ucom_put_data(&sc->sc_ucom, pc, 2, actlen);
 474                 }
 475         case USB_ST_SETUP:
 476 tr_setup:
 477                 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 478                 usbd_transfer_submit(xfer);
 479                 return;
 480
 481         default:                        /* Error */
 482                 if (error != USB_ERR_CANCELLED) {
 483                         /* try to clear stall first */
 484                         usbd_xfer_set_stall(xfer);
 485                         goto tr_setup;
 486                 }
 487                 return;
 488         }
 489 }
 490
 491 static void
 492 uftdi_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff)
 493 {
 494         struct uftdi_softc *sc = ucom->sc_parent;
 495         uint16_t wIndex = ucom->sc_portno;
 496         uint16_t wValue;
 497         struct usb_device_request req;
 498
 499         wValue = onoff ? FTDI_SIO_SET_DTR_HIGH : FTDI_SIO_SET_DTR_LOW;
 500
 501         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 502         req.bRequest = FTDI_SIO_MODEM_CTRL;
 503         USETW(req.wValue, wValue);
 504         USETW(req.wIndex, wIndex);
 505         USETW(req.wLength, 0);
 506         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 507             &req, NULL, 0, 1000);
 508 }
 509
 510 static void
 511 uftdi_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff)
 512 {
 513         struct uftdi_softc *sc = ucom->sc_parent;
 514         uint16_t wIndex = ucom->sc_portno;
 515         uint16_t wValue;
 516         struct usb_device_request req;
 517
 518         wValue = onoff ? FTDI_SIO_SET_RTS_HIGH : FTDI_SIO_SET_RTS_LOW;
 519
 520         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 521         req.bRequest = FTDI_SIO_MODEM_CTRL;
 522         USETW(req.wValue, wValue);
 523         USETW(req.wIndex, wIndex);
 524         USETW(req.wLength, 0);
 525         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 526             &req, NULL, 0, 1000);
 527 }
 528
 529 static void
 530 uftdi_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff)
 531 {
 532         struct uftdi_softc *sc = ucom->sc_parent;
 533         uint16_t wIndex = ucom->sc_portno;
 534         uint16_t wValue;
 535         struct usb_device_request req;
 536
 537         if (onoff) {
 538                 sc->sc_last_lcr |= FTDI_SIO_SET_BREAK;
 539         } else {
 540                 sc->sc_last_lcr &= ~FTDI_SIO_SET_BREAK;
 541         }
 542
 543         wValue = sc->sc_last_lcr;
 544
 545         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 546         req.bRequest = FTDI_SIO_SET_DATA;
 547         USETW(req.wValue, wValue);
 548         USETW(req.wIndex, wIndex);
 549         USETW(req.wLength, 0);
 550         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 551             &req, NULL, 0, 1000);
 552 }
 553
 554 static int
 555 uftdi_set_parm_soft(struct termios *t,
 556     struct uftdi_param_config *cfg, uint8_t type)
 557 {
 558         memset(cfg, 0, sizeof(*cfg));
 559
 560         switch (type) {
 561         case UFTDI_TYPE_SIO:
 562                 switch (t->c_ospeed) {
 563                 case 300:
 564                         cfg->rate = ftdi_sio_b300;
 565                         break;
 566                 case 600:
 567                         cfg->rate = ftdi_sio_b600;
 568                         break;
 569                 case 1200:
 570                         cfg->rate = ftdi_sio_b1200;
 571                         break;
 572                 case 2400:
 573                         cfg->rate = ftdi_sio_b2400;
 574                         break;
 575                 case 4800:
 576                         cfg->rate = ftdi_sio_b4800;
 577                         break;
 578                 case 9600:
 579                         cfg->rate = ftdi_sio_b9600;
 580                         break;
 581                 case 19200:
 582                         cfg->rate = ftdi_sio_b19200;
 583                         break;
 584                 case 38400:
 585                         cfg->rate = ftdi_sio_b38400;
 586                         break;
 587                 case 57600:
 588                         cfg->rate = ftdi_sio_b57600;
 589                         break;
 590                 case 115200:
 591                         cfg->rate = ftdi_sio_b115200;
 592                         break;
 593                 default:
 594                         return (EINVAL);
 595                 }
 596                 break;
 597
 598         case UFTDI_TYPE_8U232AM:
 599                 if (uftdi_8u232am_getrate(t->c_ospeed, &cfg->rate)) {
 600                         return (EINVAL);
 601                 }
 602                 break;
 603         }
 604
 605         if (t->c_cflag & CSTOPB)
 606                 cfg->lcr = FTDI_SIO_SET_DATA_STOP_BITS_2;
 607         else
 608                 cfg->lcr = FTDI_SIO_SET_DATA_STOP_BITS_1;
 609
 610         if (t->c_cflag & PARENB) {
 611                 if (t->c_cflag & PARODD) {
 612                         cfg->lcr |= FTDI_SIO_SET_DATA_PARITY_ODD;
 613                 } else {
 614                         cfg->lcr |= FTDI_SIO_SET_DATA_PARITY_EVEN;
 615                 }
 616         } else {
 617                 cfg->lcr |= FTDI_SIO_SET_DATA_PARITY_NONE;
 618         }
 619
 620         switch (t->c_cflag & CSIZE) {
 621         case CS5:
 622                 cfg->lcr |= FTDI_SIO_SET_DATA_BITS(5);
 623                 break;
 624
 625         case CS6:
 626                 cfg->lcr |= FTDI_SIO_SET_DATA_BITS(6);
 627                 break;
 628
 629         case CS7:
 630                 cfg->lcr |= FTDI_SIO_SET_DATA_BITS(7);
 631                 break;
 632
 633         case CS8:
 634                 cfg->lcr |= FTDI_SIO_SET_DATA_BITS(8);
 635                 break;
 636         }
 637
 638         if (t->c_cflag & CRTSCTS) {
 639                 cfg->v_flow = FTDI_SIO_RTS_CTS_HS;
 640         } else if (t->c_iflag & (IXON | IXOFF)) {
 641                 cfg->v_flow = FTDI_SIO_XON_XOFF_HS;
 642                 cfg->v_start = t->c_cc[VSTART];
 643                 cfg->v_stop = t->c_cc[VSTOP];
 644         } else {
 645                 cfg->v_flow = FTDI_SIO_DISABLE_FLOW_CTRL;
 646         }
 647
 648         return (0);
 649 }
 650
 651 static int
 652 uftdi_pre_param(struct ucom_softc *ucom, struct termios *t)
 653 {
 654         struct uftdi_softc *sc = ucom->sc_parent;
 655         struct uftdi_param_config cfg;
 656
 657         DPRINTF("\n");
 658
 659         return (uftdi_set_parm_soft(t, &cfg, sc->sc_type));
 660 }
 661
 662 static void
 663 uftdi_cfg_param(struct ucom_softc *ucom, struct termios *t)
 664 {
 665         struct uftdi_softc *sc = ucom->sc_parent;
 666         uint16_t wIndex = ucom->sc_portno;
 667         struct uftdi_param_config cfg;
 668         struct usb_device_request req;
 669
 670         if (uftdi_set_parm_soft(t, &cfg, sc->sc_type)) {
 671                 /* should not happen */
 672                 return;
 673         }
 674         sc->sc_last_lcr = cfg.lcr;
 675
 676         DPRINTF("\n");
 677
 678         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 679         req.bRequest = FTDI_SIO_SET_BAUD_RATE;
 680         USETW(req.wValue, cfg.rate);
 681         USETW(req.wIndex, wIndex);
 682         USETW(req.wLength, 0);
 683         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 684             &req, NULL, 0, 1000);
 685
 686         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 687         req.bRequest = FTDI_SIO_SET_DATA;
 688         USETW(req.wValue, cfg.lcr);
 689         USETW(req.wIndex, wIndex);
 690         USETW(req.wLength, 0);
 691         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 692             &req, NULL, 0, 1000);
 693
 694         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 695         req.bRequest = FTDI_SIO_SET_FLOW_CTRL;
 696         USETW2(req.wValue, cfg.v_stop, cfg.v_start);
 697         USETW2(req.wIndex, cfg.v_flow, wIndex);
 698         USETW(req.wLength, 0);
 699         ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom,
 700             &req, NULL, 0, 1000);
 701 }
 702
 703 static void
 704 uftdi_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr)
 705 {
 706         struct uftdi_softc *sc = ucom->sc_parent;
 707
 708         DPRINTF("msr=0x%02x lsr=0x%02x\n",
 709             sc->sc_msr, sc->sc_lsr);
 710
 711         *msr = sc->sc_msr;
 712         *lsr = sc->sc_lsr;
 713 }
 714
 715 static void
 716 uftdi_start_read(struct ucom_softc *ucom)
 717 {
 718         struct uftdi_softc *sc = ucom->sc_parent;
 719
 720         usbd_transfer_start(sc->sc_xfer[UFTDI_BULK_DT_RD]);
 721 }
 722
 723 static void
 724 uftdi_stop_read(struct ucom_softc *ucom)
 725 {
 726         struct uftdi_softc *sc = ucom->sc_parent;
 727
 728         usbd_transfer_stop(sc->sc_xfer[UFTDI_BULK_DT_RD]);
 729 }
 730
 731 static void
 732 uftdi_start_write(struct ucom_softc *ucom)
 733 {
 734         struct uftdi_softc *sc = ucom->sc_parent;
 735
 736         usbd_transfer_start(sc->sc_xfer[UFTDI_BULK_DT_WR]);
 737 }
 738
 739 static void
 740 uftdi_stop_write(struct ucom_softc *ucom)
 741 {
 742         struct uftdi_softc *sc = ucom->sc_parent;
 743
 744         usbd_transfer_stop(sc->sc_xfer[UFTDI_BULK_DT_WR]);
 745 }
 746
 747 /*------------------------------------------------------------------------*
 748  *      uftdi_8u232am_getrate
 749  *
 750  * Return values:
 751  *    0: Success
 752  * Else: Failure
 753  *------------------------------------------------------------------------*/
 754 static uint8_t
 755 uftdi_8u232am_getrate(uint32_t speed, uint16_t *rate)
 756 {
 757         /* Table of the nearest even powers-of-2 for values 0..15. */
 758         static const uint8_t roundoff[16] = {
 759                 0, 2, 2, 4, 4, 4, 8, 8,
 760                 8, 8, 8, 8, 16, 16, 16, 16,
 761         };
 762         uint32_t d;
 763         uint32_t freq;
 764         uint16_t result;
 765
 766         if ((speed < 178) || (speed > ((3000000 * 100) / 97)))
 767                 return (1);             /* prevent numerical overflow */
 768
 769         /* Special cases for 2M and 3M. */
 770         if ((speed >= ((3000000 * 100) / 103)) &&
 771             (speed <= ((3000000 * 100) / 97))) {
 772                 result = 0;
 773                 goto done;
 774         }
 775         if ((speed >= ((2000000 * 100) / 103)) &&
 776             (speed <= ((2000000 * 100) / 97))) {
 777                 result = 1;
 778                 goto done;
 779         }
 780         d = (FTDI_8U232AM_FREQ << 4) / speed;
 781         d = (d & ~15) + roundoff[d & 15];
 782
 783         if (d < FTDI_8U232AM_MIN_DIV)
 784                 d = FTDI_8U232AM_MIN_DIV;
 785         else if (d > FTDI_8U232AM_MAX_DIV)
 786                 d = FTDI_8U232AM_MAX_DIV;
 787
 788         /*
 789          * Calculate the frequency needed for "d" to exactly divide down to
 790          * our target "speed", and check that the actual frequency is within
 791          * 3% of this.
 792          */
 793         freq = (speed * d);
 794         if ((freq < ((FTDI_8U232AM_FREQ * 1600ULL) / 103)) ||
 795             (freq > ((FTDI_8U232AM_FREQ * 1600ULL) / 97)))
 796                 return (1);
 797
 798         /*
 799          * Pack the divisor into the resultant value.  The lower 14-bits
 800          * hold the integral part, while the upper 2 bits encode the
 801          * fractional component: either 0, 0.5, 0.25, or 0.125.
 802          */
 803         result = (d >> 4);
 804         if (d & 8)
 805                 result |= 0x4000;
 806         else if (d & 4)
 807                 result |= 0x8000;
 808         else if (d & 2)
 809                 result |= 0xc000;
 810
 811 done:
 812         *rate = result;
 813         return (0);
 814 }
 815
 816 static void
 817 uftdi_poll(struct ucom_softc *ucom)
 818 {
 819         struct uftdi_softc *sc = ucom->sc_parent;
 820         usbd_transfer_poll(sc->sc_xfer, UFTDI_N_TRANSFER);
 821 }