sys/dev/usb/serial/ulpt.c

   1 #include <sys/cdefs.h>
   2 __FBSDID("$FreeBSD$");
   3
   4 /*      $NetBSD: ulpt.c,v 1.60 2003/10/04 21:19:50 augustss Exp $       */
   5
   6 /*-
   7  * Copyright (c) 1998, 2003 The NetBSD Foundation, Inc.
   8  * All rights reserved.
   9  *
  10  * This code is derived from software contributed to The NetBSD Foundation
  11  * by Lennart Augustsson (lennart@augustsson.net) at
  12  * Carlstedt Research & Technology.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions
  16  * are met:
  17  * 1. Redistributions of source code must retain the above copyright
  18  *    notice, this list of conditions and the following disclaimer.
  19  * 2. Redistributions in binary form must reproduce the above copyright
  20  *    notice, this list of conditions and the following disclaimer in the
  21  *    documentation and/or other materials provided with the distribution.
  22  * 3. All advertising materials mentioning features or use of this software
  23  *    must display the following acknowledgement:
  24  *        This product includes software developed by the NetBSD
  25  *        Foundation, Inc. and its contributors.
  26  * 4. Neither the name of The NetBSD Foundation nor the names of its
  27  *    contributors may be used to endorse or promote products derived
  28  *    from this software without specific prior written permission.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  31  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  32  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  33  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  34  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  37  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  38  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  40  * POSSIBILITY OF SUCH DAMAGE.
  41  */
  42
  43 /*
  44  * Printer Class spec: http://www.usb.org/developers/data/devclass/usbprint109.PDF
  45  * Printer Class spec: http://www.usb.org/developers/devclass_docs/usbprint11.pdf
  46  */
  47
  48 #include "usbdevs.h"
  49 #include <dev/usb/usb.h>
  50 #include <dev/usb/usb_mfunc.h>
  51 #include <dev/usb/usb_error.h>
  52
  53 #define USB_DEBUG_VAR ulpt_debug
  54
  55 #include <dev/usb/usb_core.h>
  56 #include <dev/usb/usb_debug.h>
  57 #include <dev/usb/usb_process.h>
  58 #include <dev/usb/usb_request.h>
  59 #include <dev/usb/usb_lookup.h>
  60 #include <dev/usb/usb_util.h>
  61 #include <dev/usb/usb_busdma.h>
  62 #include <dev/usb/usb_mbuf.h>
  63 #include <dev/usb/usb_dev.h>
  64 #include <dev/usb/usb_parse.h>
  65
  66 #include <sys/syslog.h>
  67
  68 #if USB_DEBUG
  69 static int ulpt_debug = 0;
  70
  71 SYSCTL_NODE(_hw_usb2, OID_AUTO, ulpt, CTLFLAG_RW, 0, "USB ulpt");
  72 SYSCTL_INT(_hw_usb2_ulpt, OID_AUTO, debug, CTLFLAG_RW,
  73     &ulpt_debug, 0, "Debug level");
  74 #endif
  75
  76 #define ULPT_BSIZE              (1<<15) /* bytes */
  77 #define ULPT_IFQ_MAXLEN         2       /* units */
  78
  79 #define UR_GET_DEVICE_ID        0x00
  80 #define UR_GET_PORT_STATUS      0x01
  81 #define UR_SOFT_RESET           0x02
  82
  83 #define LPS_NERR                0x08    /* printer no error */
  84 #define LPS_SELECT              0x10    /* printer selected */
  85 #define LPS_NOPAPER             0x20    /* printer out of paper */
  86 #define LPS_INVERT      (LPS_SELECT|LPS_NERR)
  87 #define LPS_MASK        (LPS_SELECT|LPS_NERR|LPS_NOPAPER)
  88
  89 enum {
  90         ULPT_BULK_DT_WR,
  91         ULPT_BULK_DT_RD,
  92         ULPT_INTR_DT_RD,
  93         ULPT_N_TRANSFER,
  94 };
  95
  96 struct ulpt_softc {
  97         struct usb2_fifo_sc sc_fifo;
  98         struct usb2_fifo_sc sc_fifo_noreset;
  99         struct mtx sc_mtx;
 100         struct usb2_callout sc_watchdog;
 101
 102         device_t sc_dev;
 103         struct usb2_device *sc_udev;
 104         struct usb2_fifo *sc_fifo_open[2];
 105         struct usb2_xfer *sc_xfer[ULPT_N_TRANSFER];
 106
 107         int     sc_fflags;              /* current open flags, FREAD and
 108                                          * FWRITE */
 109         uint8_t sc_iface_no;
 110         uint8_t sc_last_status;
 111         uint8_t sc_zlps;                /* number of consequtive zero length
 112                                          * packets received */
 113 };
 114
 115 /* prototypes */
 116
 117 static device_probe_t ulpt_probe;
 118 static device_attach_t ulpt_attach;
 119 static device_detach_t ulpt_detach;
 120
 121 static usb2_callback_t ulpt_write_callback;
 122 static usb2_callback_t ulpt_read_callback;
 123 static usb2_callback_t ulpt_status_callback;
 124
 125 static void     ulpt_reset(struct ulpt_softc *);
 126 static void     ulpt_watchdog(void *);
 127
 128 static usb2_fifo_close_t ulpt_close;
 129 static usb2_fifo_cmd_t ulpt_start_read;
 130 static usb2_fifo_cmd_t ulpt_start_write;
 131 static usb2_fifo_cmd_t ulpt_stop_read;
 132 static usb2_fifo_cmd_t ulpt_stop_write;
 133 static usb2_fifo_ioctl_t ulpt_ioctl;
 134 static usb2_fifo_open_t ulpt_open;
 135 static usb2_fifo_open_t unlpt_open;
 136
 137 static struct usb2_fifo_methods ulpt_fifo_methods = {
 138         .f_close = &ulpt_close,
 139         .f_ioctl = &ulpt_ioctl,
 140         .f_open = &ulpt_open,
 141         .f_start_read = &ulpt_start_read,
 142         .f_start_write = &ulpt_start_write,
 143         .f_stop_read = &ulpt_stop_read,
 144         .f_stop_write = &ulpt_stop_write,
 145         .basename[0] = "ulpt",
 146 };
 147
 148 static struct usb2_fifo_methods unlpt_fifo_methods = {
 149         .f_close = &ulpt_close,
 150         .f_ioctl = &ulpt_ioctl,
 151         .f_open = &unlpt_open,
 152         .f_start_read = &ulpt_start_read,
 153         .f_start_write = &ulpt_start_write,
 154         .f_stop_read = &ulpt_stop_read,
 155         .f_stop_write = &ulpt_stop_write,
 156         .basename[0] = "unlpt",
 157 };
 158
 159 static void
 160 ulpt_reset(struct ulpt_softc *sc)
 161 {
 162         struct usb2_device_request req;
 163
 164         DPRINTFN(2, "\n");
 165
 166         req.bRequest = UR_SOFT_RESET;
 167         USETW(req.wValue, 0);
 168         USETW(req.wIndex, sc->sc_iface_no);
 169         USETW(req.wLength, 0);
 170
 171         /*
 172          * There was a mistake in the USB printer 1.0 spec that gave the
 173          * request type as UT_WRITE_CLASS_OTHER; it should have been
 174          * UT_WRITE_CLASS_INTERFACE.  Many printers use the old one,
 175          * so we try both.
 176          */
 177
 178         mtx_lock(&sc->sc_mtx);
 179         req.bmRequestType = UT_WRITE_CLASS_OTHER;
 180         if (usb2_do_request_flags(sc->sc_udev, &sc->sc_mtx,
 181             &req, NULL, 0, NULL, 2 * USB_MS_HZ)) {      /* 1.0 */
 182                 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
 183                 if (usb2_do_request_flags(sc->sc_udev, &sc->sc_mtx,
 184                     &req, NULL, 0, NULL, 2 * USB_MS_HZ)) {      /* 1.1 */
 185                         /* ignore error */
 186                 }
 187         }
 188         mtx_unlock(&sc->sc_mtx);
 189 }
 190
 191 static void
 192 ulpt_write_callback(struct usb2_xfer *xfer)
 193 {
 194         struct ulpt_softc *sc = xfer->priv_sc;
 195         struct usb2_fifo *f = sc->sc_fifo_open[USB_FIFO_TX];
 196         uint32_t actlen;
 197
 198         if (f == NULL) {
 199                 /* should not happen */
 200                 DPRINTF("no FIFO\n");
 201                 return;
 202         }
 203         DPRINTF("state=0x%x actlen=%u\n",
 204             USB_GET_STATE(xfer), xfer->actlen);
 205
 206         switch (USB_GET_STATE(xfer)) {
 207         case USB_ST_TRANSFERRED:
 208         case USB_ST_SETUP:
 209 tr_setup:
 210                 if (usb2_fifo_get_data(f, xfer->frbuffers,
 211                     0, xfer->max_data_length, &actlen, 0)) {
 212                         xfer->frlengths[0] = actlen;
 213                         usb2_start_hardware(xfer);
 214                 }
 215                 break;
 216
 217         default:                        /* Error */
 218                 if (xfer->error != USB_ERR_CANCELLED) {
 219                         /* try to clear stall first */
 220                         xfer->flags.stall_pipe = 1;
 221                         goto tr_setup;
 222                 }
 223                 break;
 224         }
 225 }
 226
 227 static void
 228 ulpt_read_callback(struct usb2_xfer *xfer)
 229 {
 230         struct ulpt_softc *sc = xfer->priv_sc;
 231         struct usb2_fifo *f = sc->sc_fifo_open[USB_FIFO_RX];
 232
 233         if (f == NULL) {
 234                 /* should not happen */
 235                 DPRINTF("no FIFO\n");
 236                 return;
 237         }
 238         DPRINTF("state=0x%x\n", USB_GET_STATE(xfer));
 239
 240         switch (USB_GET_STATE(xfer)) {
 241         case USB_ST_TRANSFERRED:
 242
 243                 if (xfer->actlen == 0) {
 244
 245                         if (sc->sc_zlps == 4) {
 246                                 /* enable BULK throttle */
 247                                 xfer->interval = 500;   /* ms */
 248                         } else {
 249                                 sc->sc_zlps++;
 250                         }
 251                 } else {
 252                         /* disable BULK throttle */
 253
 254                         xfer->interval = 0;
 255                         sc->sc_zlps = 0;
 256                 }
 257
 258                 usb2_fifo_put_data(f, xfer->frbuffers,
 259                     0, xfer->actlen, 1);
 260
 261         case USB_ST_SETUP:
 262 tr_setup:
 263                 if (usb2_fifo_put_bytes_max(f) != 0) {
 264                         xfer->frlengths[0] = xfer->max_data_length;
 265                         usb2_start_hardware(xfer);
 266                 }
 267                 break;
 268
 269         default:                        /* Error */
 270                 /* disable BULK throttle */
 271                 xfer->interval = 0;
 272                 sc->sc_zlps = 0;
 273
 274                 if (xfer->error != USB_ERR_CANCELLED) {
 275                         /* try to clear stall first */
 276                         xfer->flags.stall_pipe = 1;
 277                         goto tr_setup;
 278                 }
 279                 break;
 280         }
 281 }
 282
 283 static void
 284 ulpt_status_callback(struct usb2_xfer *xfer)
 285 {
 286         struct ulpt_softc *sc = xfer->priv_sc;
 287         struct usb2_device_request req;
 288         uint8_t cur_status;
 289         uint8_t new_status;
 290
 291         switch (USB_GET_STATE(xfer)) {
 292         case USB_ST_TRANSFERRED:
 293
 294                 usb2_copy_out(xfer->frbuffers + 1, 0, &cur_status, 1);
 295
 296                 cur_status = (cur_status ^ LPS_INVERT) & LPS_MASK;
 297                 new_status = cur_status & ~sc->sc_last_status;
 298                 sc->sc_last_status = cur_status;
 299
 300                 if (new_status & LPS_SELECT)
 301                         log(LOG_NOTICE, "%s: offline\n",
 302                             device_get_nameunit(sc->sc_dev));
 303                 else if (new_status & LPS_NOPAPER)
 304                         log(LOG_NOTICE, "%s: out of paper\n",
 305                             device_get_nameunit(sc->sc_dev));
 306                 else if (new_status & LPS_NERR)
 307                         log(LOG_NOTICE, "%s: output error\n",
 308                             device_get_nameunit(sc->sc_dev));
 309                 break;
 310
 311         case USB_ST_SETUP:
 312                 req.bmRequestType = UT_READ_CLASS_INTERFACE;
 313                 req.bRequest = UR_GET_PORT_STATUS;
 314                 USETW(req.wValue, 0);
 315                 req.wIndex[0] = sc->sc_iface_no;
 316                 req.wIndex[1] = 0;
 317                 USETW(req.wLength, 1);
 318
 319                 usb2_copy_in(xfer->frbuffers, 0, &req, sizeof(req));
 320
 321                 xfer->frlengths[0] = sizeof(req);
 322                 xfer->frlengths[1] = 1;
 323                 xfer->nframes = 2;
 324                 usb2_start_hardware(xfer);
 325                 break;
 326
 327         default:                        /* Error */
 328                 DPRINTF("error=%s\n", usb2_errstr(xfer->error));
 329                 if (xfer->error != USB_ERR_CANCELLED) {
 330                         /* wait for next watchdog timeout */
 331                 }
 332                 break;
 333         }
 334 }
 335
 336 static const struct usb2_config ulpt_config[ULPT_N_TRANSFER] = {
 337         [ULPT_BULK_DT_WR] = {
 338                 .type = UE_BULK,
 339                 .endpoint = UE_ADDR_ANY,
 340                 .direction = UE_DIR_OUT,
 341                 .mh.bufsize = ULPT_BSIZE,
 342                 .mh.flags = {.pipe_bof = 1,.proxy_buffer = 1},
 343                 .mh.callback = &ulpt_write_callback,
 344         },
 345
 346         [ULPT_BULK_DT_RD] = {
 347                 .type = UE_BULK,
 348                 .endpoint = UE_ADDR_ANY,
 349                 .direction = UE_DIR_IN,
 350                 .mh.bufsize = ULPT_BSIZE,
 351                 .mh.flags = {.pipe_bof = 1,.short_xfer_ok = 1,.proxy_buffer = 1},
 352                 .mh.callback = &ulpt_read_callback,
 353         },
 354
 355         [ULPT_INTR_DT_RD] = {
 356                 .type = UE_CONTROL,
 357                 .endpoint = 0x00,       /* Control pipe */
 358                 .direction = UE_DIR_ANY,
 359                 .mh.bufsize = sizeof(struct usb2_device_request) + 1,
 360                 .mh.callback = &ulpt_status_callback,
 361                 .mh.timeout = 1000,     /* 1 second */
 362         },
 363 };
 364
 365 static void
 366 ulpt_start_read(struct usb2_fifo *fifo)
 367 {
 368         struct ulpt_softc *sc = fifo->priv_sc0;
 369
 370         usb2_transfer_start(sc->sc_xfer[ULPT_BULK_DT_RD]);
 371 }
 372
 373 static void
 374 ulpt_stop_read(struct usb2_fifo *fifo)
 375 {
 376         struct ulpt_softc *sc = fifo->priv_sc0;
 377
 378         usb2_transfer_stop(sc->sc_xfer[ULPT_BULK_DT_RD]);
 379 }
 380
 381 static void
 382 ulpt_start_write(struct usb2_fifo *fifo)
 383 {
 384         struct ulpt_softc *sc = fifo->priv_sc0;
 385
 386         usb2_transfer_start(sc->sc_xfer[ULPT_BULK_DT_WR]);
 387 }
 388
 389 static void
 390 ulpt_stop_write(struct usb2_fifo *fifo)
 391 {
 392         struct ulpt_softc *sc = fifo->priv_sc0;
 393
 394         usb2_transfer_stop(sc->sc_xfer[ULPT_BULK_DT_WR]);
 395 }
 396
 397 static int
 398 ulpt_open(struct usb2_fifo *fifo, int fflags)
 399 {
 400         struct ulpt_softc *sc = fifo->priv_sc0;
 401
 402         /* we assume that open is a serial process */
 403
 404         if (sc->sc_fflags == 0) {
 405                 ulpt_reset(sc);
 406         }
 407         return (unlpt_open(fifo, fflags));
 408 }
 409
 410 static int
 411 unlpt_open(struct usb2_fifo *fifo, int fflags)
 412 {
 413         struct ulpt_softc *sc = fifo->priv_sc0;
 414
 415         if (sc->sc_fflags & fflags) {
 416                 return (EBUSY);
 417         }
 418         if (fflags & FREAD) {
 419                 /* clear stall first */
 420                 mtx_lock(&sc->sc_mtx);
 421                 usb2_transfer_set_stall(sc->sc_xfer[ULPT_BULK_DT_RD]);
 422                 mtx_unlock(&sc->sc_mtx);
 423                 if (usb2_fifo_alloc_buffer(fifo,
 424                     sc->sc_xfer[ULPT_BULK_DT_RD]->max_data_length,
 425                     ULPT_IFQ_MAXLEN)) {
 426                         return (ENOMEM);
 427                 }
 428                 /* set which FIFO is opened */
 429                 sc->sc_fifo_open[USB_FIFO_RX] = fifo;
 430         }
 431         if (fflags & FWRITE) {
 432                 /* clear stall first */
 433                 mtx_lock(&sc->sc_mtx);
 434                 usb2_transfer_set_stall(sc->sc_xfer[ULPT_BULK_DT_WR]);
 435                 mtx_unlock(&sc->sc_mtx);
 436                 if (usb2_fifo_alloc_buffer(fifo,
 437                     sc->sc_xfer[ULPT_BULK_DT_WR]->max_data_length,
 438                     ULPT_IFQ_MAXLEN)) {
 439                         return (ENOMEM);
 440                 }
 441                 /* set which FIFO is opened */
 442                 sc->sc_fifo_open[USB_FIFO_TX] = fifo;
 443         }
 444         sc->sc_fflags |= fflags & (FREAD | FWRITE);
 445         return (0);
 446 }
 447
 448 static void
 449 ulpt_close(struct usb2_fifo *fifo, int fflags)
 450 {
 451         struct ulpt_softc *sc = fifo->priv_sc0;
 452
 453         sc->sc_fflags &= ~(fflags & (FREAD | FWRITE));
 454
 455         if (fflags & (FREAD | FWRITE)) {
 456                 usb2_fifo_free_buffer(fifo);
 457         }
 458 }
 459
 460 static int
 461 ulpt_ioctl(struct usb2_fifo *fifo, u_long cmd, void *data,
 462     int fflags)
 463 {
 464         return (ENODEV);
 465 }
 466
 467 static int
 468 ulpt_probe(device_t dev)
 469 {
 470         struct usb2_attach_arg *uaa = device_get_ivars(dev);
 471
 472         DPRINTFN(11, "\n");
 473
 474         if (uaa->usb2_mode != USB_MODE_HOST) {
 475                 return (ENXIO);
 476         }
 477         if ((uaa->info.bInterfaceClass == UICLASS_PRINTER) &&
 478             (uaa->info.bInterfaceSubClass == UISUBCLASS_PRINTER) &&
 479             ((uaa->info.bInterfaceProtocol == UIPROTO_PRINTER_UNI) ||
 480             (uaa->info.bInterfaceProtocol == UIPROTO_PRINTER_BI) ||
 481             (uaa->info.bInterfaceProtocol == UIPROTO_PRINTER_1284))) {
 482                 return (0);
 483         }
 484         return (ENXIO);
 485 }
 486
 487 static int
 488 ulpt_attach(device_t dev)
 489 {
 490         struct usb2_attach_arg *uaa = device_get_ivars(dev);
 491         struct ulpt_softc *sc = device_get_softc(dev);
 492         struct usb2_interface_descriptor *id;
 493         int unit = device_get_unit(dev);
 494         int error;
 495         uint8_t iface_index = uaa->info.bIfaceIndex;
 496         uint8_t alt_index;
 497
 498         DPRINTFN(11, "sc=%p\n", sc);
 499
 500         sc->sc_dev = dev;
 501         sc->sc_udev = uaa->device;
 502
 503         device_set_usb2_desc(dev);
 504
 505         mtx_init(&sc->sc_mtx, "ulpt lock", NULL, MTX_DEF | MTX_RECURSE);
 506
 507         usb2_callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0);
 508
 509         /* search through all the descriptors looking for bidir mode */
 510
 511         id = usb2_get_interface_descriptor(uaa->iface);
 512         alt_index = 0 - 1;
 513         while (1) {
 514                 if (id == NULL) {
 515                         break;
 516                 }
 517                 if ((id->bDescriptorType == UDESC_INTERFACE) &&
 518                     (id->bLength >= sizeof(*id))) {
 519                         if (id->bInterfaceNumber != uaa->info.bIfaceNum) {
 520                                 break;
 521                         } else {
 522                                 alt_index++;
 523                                 if ((id->bInterfaceClass == UICLASS_PRINTER) &&
 524                                     (id->bInterfaceSubClass == UISUBCLASS_PRINTER) &&
 525                                     (id->bInterfaceProtocol == UIPROTO_PRINTER_BI)) {
 526                                         goto found;
 527                                 }
 528                         }
 529                 }
 530                 id = (void *)usb2_desc_foreach(
 531                     usb2_get_config_descriptor(uaa->device), (void *)id);
 532         }
 533         goto detach;
 534
 535 found:
 536
 537         DPRINTF("setting alternate "
 538             "config number: %d\n", alt_index);
 539
 540         if (alt_index) {
 541
 542                 error = usb2_set_alt_interface_index
 543                     (uaa->device, iface_index, alt_index);
 544
 545                 if (error) {
 546                         DPRINTF("could not set alternate "
 547                             "config, error=%s\n", usb2_errstr(error));
 548                         goto detach;
 549                 }
 550         }
 551         sc->sc_iface_no = id->bInterfaceNumber;
 552
 553         error = usb2_transfer_setup(uaa->device, &iface_index,
 554             sc->sc_xfer, ulpt_config, ULPT_N_TRANSFER,
 555             sc, &sc->sc_mtx);
 556         if (error) {
 557                 DPRINTF("error=%s\n", usb2_errstr(error));
 558                 goto detach;
 559         }
 560         device_printf(sc->sc_dev, "using bi-directional mode\n");
 561
 562 #if 0
 563 /*
 564  * This code is disabled because for some mysterious reason it causes
 565  * printing not to work.  But only sometimes, and mostly with
 566  * UHCI and less often with OHCI.  *sigh*
 567  */
 568         {
 569                 struct usb2_config_descriptor *cd = usb2_get_config_descriptor(dev);
 570                 struct usb2_device_request req;
 571                 int len, alen;
 572
 573                 req.bmRequestType = UT_READ_CLASS_INTERFACE;
 574                 req.bRequest = UR_GET_DEVICE_ID;
 575                 USETW(req.wValue, cd->bConfigurationValue);
 576                 USETW2(req.wIndex, id->bInterfaceNumber, id->bAlternateSetting);
 577                 USETW(req.wLength, sizeof devinfo - 1);
 578                 error = usb2_do_request_flags(dev, &req, devinfo, USB_SHORT_XFER_OK,
 579                     &alen, USB_DEFAULT_TIMEOUT);
 580                 if (error) {
 581                         device_printf(sc->sc_dev, "cannot get device id\n");
 582                 } else if (alen <= 2) {
 583                         device_printf(sc->sc_dev, "empty device id, no "
 584                             "printer connected?\n");
 585                 } else {
 586                         /* devinfo now contains an IEEE-1284 device ID */
 587                         len = ((devinfo[0] & 0xff) << 8) | (devinfo[1] & 0xff);
 588                         if (len > sizeof devinfo - 3)
 589                                 len = sizeof devinfo - 3;
 590                         devinfo[len] = 0;
 591                         printf("%s: device id <", device_get_nameunit(sc->sc_dev));
 592                         ieee1284_print_id(devinfo + 2);
 593                         printf(">\n");
 594                 }
 595         }
 596 #endif
 597
 598         error = usb2_fifo_attach(uaa->device, sc, &sc->sc_mtx,
 599             &ulpt_fifo_methods, &sc->sc_fifo,
 600             unit, 0 - 1, uaa->info.bIfaceIndex,
 601             UID_ROOT, GID_OPERATOR, 0644);
 602         if (error) {
 603                 goto detach;
 604         }
 605         error = usb2_fifo_attach(uaa->device, sc, &sc->sc_mtx,
 606             &unlpt_fifo_methods, &sc->sc_fifo_noreset,
 607             unit, 0 - 1, uaa->info.bIfaceIndex,
 608             UID_ROOT, GID_OPERATOR, 0644);
 609         if (error) {
 610                 goto detach;
 611         }
 612         /* start reading of status */
 613
 614         mtx_lock(&sc->sc_mtx);
 615         ulpt_watchdog(sc);
 616         mtx_unlock(&sc->sc_mtx);
 617         return (0);
 618
 619 detach:
 620         ulpt_detach(dev);
 621         return (ENOMEM);
 622 }
 623
 624 static int
 625 ulpt_detach(device_t dev)
 626 {
 627         struct ulpt_softc *sc = device_get_softc(dev);
 628
 629         DPRINTF("sc=%p\n", sc);
 630
 631         usb2_fifo_detach(&sc->sc_fifo);
 632         usb2_fifo_detach(&sc->sc_fifo_noreset);
 633
 634         mtx_lock(&sc->sc_mtx);
 635         usb2_callout_stop(&sc->sc_watchdog);
 636         mtx_unlock(&sc->sc_mtx);
 637
 638         usb2_transfer_unsetup(sc->sc_xfer, ULPT_N_TRANSFER);
 639         usb2_callout_drain(&sc->sc_watchdog);
 640         mtx_destroy(&sc->sc_mtx);
 641
 642         return (0);
 643 }
 644
 645 #if 0
 646 /* XXX This does not belong here. */
 647
 648 /*
 649  * Compare two strings until the second ends.
 650  */
 651
 652 static uint8_t
 653 ieee1284_compare(const char *a, const char *b)
 654 {
 655         while (1) {
 656
 657                 if (*b == 0) {
 658                         break;
 659                 }
 660                 if (*a != *b) {
 661                         return 1;
 662                 }
 663                 b++;
 664                 a++;
 665         }
 666         return 0;
 667 }
 668
 669 /*
 670  * Print select parts of an IEEE 1284 device ID.
 671  */
 672 void
 673 ieee1284_print_id(char *str)
 674 {
 675         char *p, *q;
 676
 677         for (p = str - 1; p; p = strchr(p, ';')) {
 678                 p++;                    /* skip ';' */
 679                 if (ieee1284_compare(p, "MFG:") == 0 ||
 680                     ieee1284_compare(p, "MANUFACTURER:") == 0 ||
 681                     ieee1284_compare(p, "MDL:") == 0 ||
 682                     ieee1284_compare(p, "MODEL:") == 0) {
 683                         q = strchr(p, ';');
 684                         if (q)
 685                                 printf("%.*s", (int)(q - p + 1), p);
 686                 }
 687         }
 688 }
 689
 690 #endif
 691
 692 static void
 693 ulpt_watchdog(void *arg)
 694 {
 695         struct ulpt_softc *sc = arg;
 696
 697         mtx_assert(&sc->sc_mtx, MA_OWNED);
 698
 699         usb2_transfer_start(sc->sc_xfer[ULPT_INTR_DT_RD]);
 700
 701         usb2_callout_reset(&sc->sc_watchdog,
 702             hz, &ulpt_watchdog, sc);
 703 }
 704
 705 static devclass_t ulpt_devclass;
 706
 707 static device_method_t ulpt_methods[] = {
 708         DEVMETHOD(device_probe, ulpt_probe),
 709         DEVMETHOD(device_attach, ulpt_attach),
 710         DEVMETHOD(device_detach, ulpt_detach),
 711         {0, 0}
 712 };
 713
 714 static driver_t ulpt_driver = {
 715         .name = "ulpt",
 716         .methods = ulpt_methods,
 717         .size = sizeof(struct ulpt_softc),
 718 };
 719
 720 DRIVER_MODULE(ulpt, uhub, ulpt_driver, ulpt_devclass, NULL, 0);
 721 MODULE_DEPEND(ulpt, usb, 1, 1, 1);
 722 MODULE_DEPEND(ulpt, ucom, 1, 1, 1);