sys/bus/u4b/serial/ulpt.c

   1 /*      $NetBSD: ulpt.c,v 1.60 2003/10/04 21:19:50 augustss Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1998, 2003 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) at
   9  * Carlstedt Research & Technology.
  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  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Printer Class spec: http://www.usb.org/developers/data/devclass/usbprint109.PDF
  35  * Printer Class spec: http://www.usb.org/developers/devclass_docs/usbprint11.pdf
  36  */
  37
  38 #include <sys/stdint.h>
  39 #include <sys/param.h>
  40 #include <sys/queue.h>
  41 #include <sys/types.h>
  42 #include <sys/systm.h>
  43 #include <sys/kernel.h>
  44 #include <sys/bus.h>
  45 #include <sys/module.h>
  46 #include <sys/lock.h>
  47 #include <sys/condvar.h>
  48 #include <sys/sysctl.h>
  49 #include <sys/unistd.h>
  50 #include <sys/callout.h>
  51 #include <sys/malloc.h>
  52 #include <sys/priv.h>
  53 #include <sys/syslog.h>
  54 #include <sys/conf.h>
  55 #include <sys/fcntl.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/usbhid.h>
  61 #include "usbdevs.h"
  62
  63 #define USB_DEBUG_VAR ulpt_debug
  64 #include <bus/u4b/usb_debug.h>
  65 #include <bus/u4b/usb_process.h>
  66
  67 #ifdef USB_DEBUG
  68 static int ulpt_debug = 0;
  69
  70 static SYSCTL_NODE(_hw_usb, OID_AUTO, ulpt, CTLFLAG_RW, 0, "USB ulpt");
  71 SYSCTL_INT(_hw_usb_ulpt, OID_AUTO, debug, CTLFLAG_RW,
  72     &ulpt_debug, 0, "Debug level");
  73 #endif
  74
  75 #define ULPT_BSIZE              (1<<15) /* bytes */
  76 #define ULPT_IFQ_MAXLEN         2       /* units */
  77
  78 #define UR_GET_DEVICE_ID        0x00
  79 #define UR_GET_PORT_STATUS      0x01
  80 #define UR_SOFT_RESET           0x02
  81
  82 #define LPS_NERR                0x08    /* printer no error */
  83 #define LPS_SELECT              0x10    /* printer selected */
  84 #define LPS_NOPAPER             0x20    /* printer out of paper */
  85 #define LPS_INVERT      (LPS_SELECT|LPS_NERR)
  86 #define LPS_MASK        (LPS_SELECT|LPS_NERR|LPS_NOPAPER)
  87
  88 enum {
  89         ULPT_BULK_DT_WR,
  90         ULPT_BULK_DT_RD,
  91         ULPT_INTR_DT_RD,
  92         ULPT_N_TRANSFER,
  93 };
  94
  95 struct ulpt_softc {
  96         struct usb_fifo_sc sc_fifo;
  97         struct usb_fifo_sc sc_fifo_noreset;
  98         struct lock sc_lock;
  99         struct usb_callout sc_watchdog;
 100
 101         device_t sc_dev;
 102         struct usb_device *sc_udev;
 103         struct usb_fifo *sc_fifo_open[2];
 104         struct usb_xfer *sc_xfer[ULPT_N_TRANSFER];
 105
 106         int     sc_fflags;              /* current open flags, FREAD and
 107                                          * FWRITE */
 108         uint8_t sc_iface_no;
 109         uint8_t sc_last_status;
 110         uint8_t sc_zlps;                /* number of consequtive zero length
 111                                          * packets received */
 112 };
 113
 114 /* prototypes */
 115
 116 static device_probe_t ulpt_probe;
 117 static device_attach_t ulpt_attach;
 118 static device_detach_t ulpt_detach;
 119
 120 static usb_callback_t ulpt_write_callback;
 121 static usb_callback_t ulpt_read_callback;
 122 static usb_callback_t ulpt_status_callback;
 123
 124 static void     ulpt_reset(struct ulpt_softc *);
 125 static void     ulpt_watchdog(void *);
 126
 127 static usb_fifo_close_t ulpt_close;
 128 static usb_fifo_cmd_t ulpt_start_read;
 129 static usb_fifo_cmd_t ulpt_start_write;
 130 static usb_fifo_cmd_t ulpt_stop_read;
 131 static usb_fifo_cmd_t ulpt_stop_write;
 132 static usb_fifo_ioctl_t ulpt_ioctl;
 133 static usb_fifo_open_t ulpt_open;
 134 static usb_fifo_open_t unlpt_open;
 135
 136 static struct usb_fifo_methods ulpt_fifo_methods = {
 137         .f_close = &ulpt_close,
 138         .f_ioctl = &ulpt_ioctl,
 139         .f_open = &ulpt_open,
 140         .f_start_read = &ulpt_start_read,
 141         .f_start_write = &ulpt_start_write,
 142         .f_stop_read = &ulpt_stop_read,
 143         .f_stop_write = &ulpt_stop_write,
 144         .basename[0] = "ulpt",
 145 };
 146
 147 static struct usb_fifo_methods unlpt_fifo_methods = {
 148         .f_close = &ulpt_close,
 149         .f_ioctl = &ulpt_ioctl,
 150         .f_open = &unlpt_open,
 151         .f_start_read = &ulpt_start_read,
 152         .f_start_write = &ulpt_start_write,
 153         .f_stop_read = &ulpt_stop_read,
 154         .f_stop_write = &ulpt_stop_write,
 155         .basename[0] = "unlpt",
 156 };
 157
 158 static void
 159 ulpt_reset(struct ulpt_softc *sc)
 160 {
 161         struct usb_device_request req;
 162
 163         DPRINTFN(2, "\n");
 164
 165         req.bRequest = UR_SOFT_RESET;
 166         USETW(req.wValue, 0);
 167         USETW(req.wIndex, sc->sc_iface_no);
 168         USETW(req.wLength, 0);
 169
 170         /*
 171          * There was a mistake in the USB printer 1.0 spec that gave the
 172          * request type as UT_WRITE_CLASS_OTHER; it should have been
 173          * UT_WRITE_CLASS_INTERFACE.  Many printers use the old one,
 174          * so we try both.
 175          */
 176
 177         lockmgr(&sc->sc_lock, LK_EXCLUSIVE);
 178         req.bmRequestType = UT_WRITE_CLASS_OTHER;
 179         if (usbd_do_request_flags(sc->sc_udev, &sc->sc_lock,
 180             &req, NULL, 0, NULL, 2 * USB_MS_HZ)) {      /* 1.0 */
 181                 req.bmRequestType = UT_WRITE_CLASS_INTERFACE;
 182                 if (usbd_do_request_flags(sc->sc_udev, &sc->sc_lock,
 183                     &req, NULL, 0, NULL, 2 * USB_MS_HZ)) {      /* 1.1 */
 184                         /* ignore error */
 185                 }
 186         }
 187         lockmgr(&sc->sc_lock, LK_RELEASE);
 188 }
 189
 190 static void
 191 ulpt_write_callback(struct usb_xfer *xfer, usb_error_t error)
 192 {
 193         struct ulpt_softc *sc = usbd_xfer_softc(xfer);
 194         struct usb_fifo *f = sc->sc_fifo_open[USB_FIFO_TX];
 195         struct usb_page_cache *pc;
 196         int actlen, max;
 197
 198         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 199
 200         if (f == NULL) {
 201                 /* should not happen */
 202                 DPRINTF("no FIFO\n");
 203                 return;
 204         }
 205         DPRINTF("state=0x%x actlen=%d\n", USB_GET_STATE(xfer), actlen);
 206
 207         switch (USB_GET_STATE(xfer)) {
 208         case USB_ST_TRANSFERRED:
 209         case USB_ST_SETUP:
 210 tr_setup:
 211                 pc = usbd_xfer_get_frame(xfer, 0);
 212                 max = usbd_xfer_max_len(xfer);
 213                 if (usb_fifo_get_data(f, pc, 0, max, &actlen, 0)) {
 214                         usbd_xfer_set_frame_len(xfer, 0, actlen);
 215                         usbd_transfer_submit(xfer);
 216                 }
 217                 break;
 218
 219         default:                        /* Error */
 220                 if (error != USB_ERR_CANCELLED) {
 221                         /* try to clear stall first */
 222                         usbd_xfer_set_stall(xfer);
 223                         goto tr_setup;
 224                 }
 225                 break;
 226         }
 227 }
 228
 229 static void
 230 ulpt_read_callback(struct usb_xfer *xfer, usb_error_t error)
 231 {
 232         struct ulpt_softc *sc = usbd_xfer_softc(xfer);
 233         struct usb_fifo *f = sc->sc_fifo_open[USB_FIFO_RX];
 234         struct usb_page_cache *pc;
 235         int actlen;
 236
 237         usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL);
 238
 239         if (f == NULL) {
 240                 /* should not happen */
 241                 DPRINTF("no FIFO\n");
 242                 return;
 243         }
 244         DPRINTF("state=0x%x\n", USB_GET_STATE(xfer));
 245
 246         switch (USB_GET_STATE(xfer)) {
 247         case USB_ST_TRANSFERRED:
 248
 249                 if (actlen == 0) {
 250
 251                         if (sc->sc_zlps == 4) {
 252                                 /* enable BULK throttle */
 253                                 usbd_xfer_set_interval(xfer, 500); /* ms */
 254                         } else {
 255                                 sc->sc_zlps++;
 256                         }
 257                 } else {
 258                         /* disable BULK throttle */
 259
 260                         usbd_xfer_set_interval(xfer, 0);
 261                         sc->sc_zlps = 0;
 262                 }
 263
 264                 pc = usbd_xfer_get_frame(xfer, 0);
 265                 usb_fifo_put_data(f, pc, 0, actlen, 1);
 266
 267         case USB_ST_SETUP:
 268 tr_setup:
 269                 if (usb_fifo_put_bytes_max(f) != 0) {
 270                         usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer));
 271                         usbd_transfer_submit(xfer);
 272                 }
 273                 break;
 274
 275         default:                        /* Error */
 276                 /* disable BULK throttle */
 277                 usbd_xfer_set_interval(xfer, 0);
 278                 sc->sc_zlps = 0;
 279
 280                 if (error != USB_ERR_CANCELLED) {
 281                         /* try to clear stall first */
 282                         usbd_xfer_set_stall(xfer);
 283                         goto tr_setup;
 284                 }
 285                 break;
 286         }
 287 }
 288
 289 static void
 290 ulpt_status_callback(struct usb_xfer *xfer, usb_error_t error)
 291 {
 292         struct ulpt_softc *sc = usbd_xfer_softc(xfer);
 293         struct usb_device_request req;
 294         struct usb_page_cache *pc;
 295         uint8_t cur_status;
 296         uint8_t new_status;
 297
 298         switch (USB_GET_STATE(xfer)) {
 299         case USB_ST_TRANSFERRED:
 300
 301                 pc = usbd_xfer_get_frame(xfer, 1);
 302                 usbd_copy_out(pc, 0, &cur_status, 1);
 303
 304                 cur_status = (cur_status ^ LPS_INVERT) & LPS_MASK;
 305                 new_status = cur_status & ~sc->sc_last_status;
 306                 sc->sc_last_status = cur_status;
 307
 308                 if (new_status & LPS_SELECT)
 309                         log(LOG_NOTICE, "%s: offline\n",
 310                             device_get_nameunit(sc->sc_dev));
 311                 else if (new_status & LPS_NOPAPER)
 312                         log(LOG_NOTICE, "%s: out of paper\n",
 313                             device_get_nameunit(sc->sc_dev));
 314                 else if (new_status & LPS_NERR)
 315                         log(LOG_NOTICE, "%s: output error\n",
 316                             device_get_nameunit(sc->sc_dev));
 317                 break;
 318
 319         case USB_ST_SETUP:
 320                 req.bmRequestType = UT_READ_CLASS_INTERFACE;
 321                 req.bRequest = UR_GET_PORT_STATUS;
 322                 USETW(req.wValue, 0);
 323                 req.wIndex[0] = sc->sc_iface_no;
 324                 req.wIndex[1] = 0;
 325                 USETW(req.wLength, 1);
 326
 327                 pc = usbd_xfer_get_frame(xfer, 0);
 328                 usbd_copy_in(pc, 0, &req, sizeof(req));
 329
 330                 usbd_xfer_set_frame_len(xfer, 0, sizeof(req));
 331                 usbd_xfer_set_frame_len(xfer, 1, 1);
 332                 usbd_xfer_set_frames(xfer, 2);
 333                 usbd_transfer_submit(xfer);
 334                 break;
 335
 336         default:                        /* Error */
 337                 DPRINTF("error=%s\n", usbd_errstr(error));
 338                 if (error != USB_ERR_CANCELLED) {
 339                         /* wait for next watchdog timeout */
 340                 }
 341                 break;
 342         }
 343 }
 344
 345 static const struct usb_config ulpt_config[ULPT_N_TRANSFER] = {
 346         [ULPT_BULK_DT_WR] = {
 347                 .type = UE_BULK,
 348                 .endpoint = UE_ADDR_ANY,
 349                 .direction = UE_DIR_OUT,
 350                 .bufsize = ULPT_BSIZE,
 351                 .flags = {.pipe_bof = 1,.proxy_buffer = 1},
 352                 .callback = &ulpt_write_callback,
 353         },
 354
 355         [ULPT_BULK_DT_RD] = {
 356                 .type = UE_BULK,
 357                 .endpoint = UE_ADDR_ANY,
 358                 .direction = UE_DIR_IN,
 359                 .bufsize = ULPT_BSIZE,
 360                 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,.proxy_buffer = 1},
 361                 .callback = &ulpt_read_callback,
 362         },
 363
 364         [ULPT_INTR_DT_RD] = {
 365                 .type = UE_CONTROL,
 366                 .endpoint = 0x00,       /* Control pipe */
 367                 .direction = UE_DIR_ANY,
 368                 .bufsize = sizeof(struct usb_device_request) + 1,
 369                 .callback = &ulpt_status_callback,
 370                 .timeout = 1000,        /* 1 second */
 371         },
 372 };
 373
 374 static void
 375 ulpt_start_read(struct usb_fifo *fifo)
 376 {
 377         struct ulpt_softc *sc = usb_fifo_softc(fifo);
 378
 379         usbd_transfer_start(sc->sc_xfer[ULPT_BULK_DT_RD]);
 380 }
 381
 382 static void
 383 ulpt_stop_read(struct usb_fifo *fifo)
 384 {
 385         struct ulpt_softc *sc = usb_fifo_softc(fifo);
 386
 387         usbd_transfer_stop(sc->sc_xfer[ULPT_BULK_DT_RD]);
 388 }
 389
 390 static void
 391 ulpt_start_write(struct usb_fifo *fifo)
 392 {
 393         struct ulpt_softc *sc = usb_fifo_softc(fifo);
 394
 395         usbd_transfer_start(sc->sc_xfer[ULPT_BULK_DT_WR]);
 396 }
 397
 398 static void
 399 ulpt_stop_write(struct usb_fifo *fifo)
 400 {
 401         struct ulpt_softc *sc = usb_fifo_softc(fifo);
 402
 403         usbd_transfer_stop(sc->sc_xfer[ULPT_BULK_DT_WR]);
 404 }
 405
 406 static int
 407 ulpt_open(struct usb_fifo *fifo, int fflags)
 408 {
 409         struct ulpt_softc *sc = usb_fifo_softc(fifo);
 410
 411         /* we assume that open is a serial process */
 412
 413         if (sc->sc_fflags == 0) {
 414
 415                 /* reset USB paralell port */
 416
 417                 ulpt_reset(sc);
 418         }
 419         return (unlpt_open(fifo, fflags));
 420 }
 421
 422 static int
 423 unlpt_open(struct usb_fifo *fifo, int fflags)
 424 {
 425         struct ulpt_softc *sc = usb_fifo_softc(fifo);
 426
 427         if (sc->sc_fflags & fflags) {
 428                 return (EBUSY);
 429         }
 430         if (fflags & FREAD) {
 431                 /* clear stall first */
 432                 lockmgr(&sc->sc_lock, LK_EXCLUSIVE);
 433                 usbd_xfer_set_stall(sc->sc_xfer[ULPT_BULK_DT_RD]);
 434                 lockmgr(&sc->sc_lock, LK_RELEASE);
 435                 if (usb_fifo_alloc_buffer(fifo,
 436                     usbd_xfer_max_len(sc->sc_xfer[ULPT_BULK_DT_RD]),
 437                     ULPT_IFQ_MAXLEN)) {
 438                         return (ENOMEM);
 439                 }
 440                 /* set which FIFO is opened */
 441                 sc->sc_fifo_open[USB_FIFO_RX] = fifo;
 442         }
 443         if (fflags & FWRITE) {
 444                 /* clear stall first */
 445                 lockmgr(&sc->sc_lock, LK_EXCLUSIVE);
 446                 usbd_xfer_set_stall(sc->sc_xfer[ULPT_BULK_DT_WR]);
 447                 lockmgr(&sc->sc_lock, LK_RELEASE);
 448                 if (usb_fifo_alloc_buffer(fifo,
 449                     usbd_xfer_max_len(sc->sc_xfer[ULPT_BULK_DT_WR]),
 450                     ULPT_IFQ_MAXLEN)) {
 451                         return (ENOMEM);
 452                 }
 453                 /* set which FIFO is opened */
 454                 sc->sc_fifo_open[USB_FIFO_TX] = fifo;
 455         }
 456         sc->sc_fflags |= fflags & (FREAD | FWRITE);
 457         return (0);
 458 }
 459
 460 static void
 461 ulpt_close(struct usb_fifo *fifo, int fflags)
 462 {
 463         struct ulpt_softc *sc = usb_fifo_softc(fifo);
 464
 465         sc->sc_fflags &= ~(fflags & (FREAD | FWRITE));
 466
 467         if (fflags & (FREAD | FWRITE)) {
 468                 usb_fifo_free_buffer(fifo);
 469         }
 470 }
 471
 472 static int
 473 ulpt_ioctl(struct usb_fifo *fifo, u_long cmd, void *data,
 474     int fflags)
 475 {
 476         return (ENODEV);
 477 }
 478
 479 static const STRUCT_USB_HOST_ID ulpt_devs[] = {
 480         /* Uni-directional USB printer */
 481         {USB_IFACE_CLASS(UICLASS_PRINTER),
 482          USB_IFACE_SUBCLASS(UISUBCLASS_PRINTER),
 483          USB_IFACE_PROTOCOL(UIPROTO_PRINTER_UNI)},
 484
 485         /* Bi-directional USB printer */
 486         {USB_IFACE_CLASS(UICLASS_PRINTER),
 487          USB_IFACE_SUBCLASS(UISUBCLASS_PRINTER),
 488          USB_IFACE_PROTOCOL(UIPROTO_PRINTER_BI)},
 489
 490         /* 1284 USB printer */
 491         {USB_IFACE_CLASS(UICLASS_PRINTER),
 492          USB_IFACE_SUBCLASS(UISUBCLASS_PRINTER),
 493          USB_IFACE_PROTOCOL(UIPROTO_PRINTER_1284)},
 494 };
 495
 496 static int
 497 ulpt_probe(device_t dev)
 498 {
 499         struct usb_attach_arg *uaa = device_get_ivars(dev);
 500         int error;
 501
 502         DPRINTFN(11, "\n");
 503
 504         if (uaa->usb_mode != USB_MODE_HOST)
 505                 return (ENXIO);
 506
 507         error = usbd_lookup_id_by_uaa(ulpt_devs, sizeof(ulpt_devs), uaa);
 508         if (error)
 509                 return (error);
 510
 511         return (BUS_PROBE_GENERIC);
 512 }
 513
 514 static int
 515 ulpt_attach(device_t dev)
 516 {
 517         struct usb_attach_arg *uaa = device_get_ivars(dev);
 518         struct ulpt_softc *sc = device_get_softc(dev);
 519         struct usb_interface_descriptor *id;
 520         int unit = device_get_unit(dev);
 521         int error;
 522         uint8_t iface_index = uaa->info.bIfaceIndex;
 523         uint8_t alt_index;
 524
 525         DPRINTFN(11, "sc=%p\n", sc);
 526
 527         sc->sc_dev = dev;
 528         sc->sc_udev = uaa->device;
 529
 530         device_set_usb_desc(dev);
 531
 532         lockinit(&sc->sc_lock, "ulpt lock", 0, LK_CANRECURSE);
 533
 534         usb_callout_init_mtx(&sc->sc_watchdog, &sc->sc_lock, 0);
 535
 536         /* search through all the descriptors looking for bidir mode */
 537
 538         id = usbd_get_interface_descriptor(uaa->iface);
 539         alt_index = 0 - 1;
 540         while (1) {
 541                 if (id == NULL) {
 542                         break;
 543                 }
 544                 if ((id->bDescriptorType == UDESC_INTERFACE) &&
 545                     (id->bLength >= sizeof(*id))) {
 546                         if (id->bInterfaceNumber != uaa->info.bIfaceNum) {
 547                                 break;
 548                         } else {
 549                                 alt_index++;
 550                                 if ((id->bInterfaceClass == UICLASS_PRINTER) &&
 551                                     (id->bInterfaceSubClass == UISUBCLASS_PRINTER) &&
 552                                     (id->bInterfaceProtocol == UIPROTO_PRINTER_BI)) {
 553                                         goto found;
 554                                 }
 555                         }
 556                 }
 557                 id = (void *)usb_desc_foreach(
 558                     usbd_get_config_descriptor(uaa->device), (void *)id);
 559         }
 560         goto detach;
 561
 562 found:
 563
 564         DPRINTF("setting alternate "
 565             "config number: %d\n", alt_index);
 566
 567         if (alt_index) {
 568
 569                 error = usbd_set_alt_interface_index
 570                     (uaa->device, iface_index, alt_index);
 571
 572                 if (error) {
 573                         DPRINTF("could not set alternate "
 574                             "config, error=%s\n", usbd_errstr(error));
 575                         goto detach;
 576                 }
 577         }
 578         sc->sc_iface_no = id->bInterfaceNumber;
 579
 580         error = usbd_transfer_setup(uaa->device, &iface_index,
 581             sc->sc_xfer, ulpt_config, ULPT_N_TRANSFER,
 582             sc, &sc->sc_lock);
 583         if (error) {
 584                 DPRINTF("error=%s\n", usbd_errstr(error));
 585                 goto detach;
 586         }
 587         device_printf(sc->sc_dev, "using bi-directional mode\n");
 588
 589 #if 0
 590 /*
 591  * This code is disabled because for some mysterious reason it causes
 592  * printing not to work.  But only sometimes, and mostly with
 593  * UHCI and less often with OHCI.  *sigh*
 594  */
 595         {
 596                 struct usb_config_descriptor *cd = usbd_get_config_descriptor(dev);
 597                 struct usb_device_request req;
 598                 int len, alen;
 599
 600                 req.bmRequestType = UT_READ_CLASS_INTERFACE;
 601                 req.bRequest = UR_GET_DEVICE_ID;
 602                 USETW(req.wValue, cd->bConfigurationValue);
 603                 USETW2(req.wIndex, id->bInterfaceNumber, id->bAlternateSetting);
 604                 USETW(req.wLength, sizeof devinfo - 1);
 605                 error = usbd_do_request_flags(dev, &req, devinfo, USB_SHORT_XFER_OK,
 606                     &alen, USB_DEFAULT_TIMEOUT);
 607                 if (error) {
 608                         device_printf(sc->sc_dev, "cannot get device id\n");
 609                 } else if (alen <= 2) {
 610                         device_printf(sc->sc_dev, "empty device id, no "
 611                             "printer connected?\n");
 612                 } else {
 613                         /* devinfo now contains an IEEE-1284 device ID */
 614                         len = ((devinfo[0] & 0xff) << 8) | (devinfo[1] & 0xff);
 615                         if (len > sizeof devinfo - 3)
 616                                 len = sizeof devinfo - 3;
 617                         devinfo[len] = 0;
 618                         printf("%s: device id <", device_get_nameunit(sc->sc_dev));
 619                         ieee1284_print_id(devinfo + 2);
 620                         printf(">\n");
 621                 }
 622         }
 623 #endif
 624
 625         error = usb_fifo_attach(uaa->device, sc, &sc->sc_lock,
 626             &ulpt_fifo_methods, &sc->sc_fifo,
 627             unit, 0 - 1, uaa->info.bIfaceIndex,
 628             UID_ROOT, GID_OPERATOR, 0644);
 629         if (error) {
 630                 goto detach;
 631         }
 632         error = usb_fifo_attach(uaa->device, sc, &sc->sc_lock,
 633             &unlpt_fifo_methods, &sc->sc_fifo_noreset,
 634             unit, 0 - 1, uaa->info.bIfaceIndex,
 635             UID_ROOT, GID_OPERATOR, 0644);
 636         if (error) {
 637                 goto detach;
 638         }
 639         /* start reading of status */
 640
 641         lockmgr(&sc->sc_lock, LK_EXCLUSIVE);
 642         ulpt_watchdog(sc);
 643         lockmgr(&sc->sc_lock, LK_RELEASE);
 644         return (0);
 645
 646 detach:
 647         ulpt_detach(dev);
 648         return (ENOMEM);
 649 }
 650
 651 static int
 652 ulpt_detach(device_t dev)
 653 {
 654         struct ulpt_softc *sc = device_get_softc(dev);
 655
 656         DPRINTF("sc=%p\n", sc);
 657
 658         usb_fifo_detach(&sc->sc_fifo);
 659         usb_fifo_detach(&sc->sc_fifo_noreset);
 660
 661         lockmgr(&sc->sc_lock, LK_EXCLUSIVE);
 662         usb_callout_stop(&sc->sc_watchdog);
 663         lockmgr(&sc->sc_lock, LK_RELEASE);
 664
 665         usbd_transfer_unsetup(sc->sc_xfer, ULPT_N_TRANSFER);
 666         usb_callout_drain(&sc->sc_watchdog);
 667         lockuninit(&sc->sc_lock);
 668
 669         return (0);
 670 }
 671
 672 #if 0
 673 /* XXX This does not belong here. */
 674
 675 /*
 676  * Compare two strings until the second ends.
 677  */
 678
 679 static uint8_t
 680 ieee1284_compare(const char *a, const char *b)
 681 {
 682         while (1) {
 683
 684                 if (*b == 0) {
 685                         break;
 686                 }
 687                 if (*a != *b) {
 688                         return 1;
 689                 }
 690                 b++;
 691                 a++;
 692         }
 693         return 0;
 694 }
 695
 696 /*
 697  * Print select parts of an IEEE 1284 device ID.
 698  */
 699 void
 700 ieee1284_print_id(char *str)
 701 {
 702         char *p, *q;
 703
 704         for (p = str - 1; p; p = strchr(p, ';')) {
 705                 p++;                    /* skip ';' */
 706                 if (ieee1284_compare(p, "MFG:") == 0 ||
 707                     ieee1284_compare(p, "MANUFACTURER:") == 0 ||
 708                     ieee1284_compare(p, "MDL:") == 0 ||
 709                     ieee1284_compare(p, "MODEL:") == 0) {
 710                         q = strchr(p, ';');
 711                         if (q)
 712                                 printf("%.*s", (int)(q - p + 1), p);
 713                 }
 714         }
 715 }
 716
 717 #endif
 718
 719 static void
 720 ulpt_watchdog(void *arg)
 721 {
 722         struct ulpt_softc *sc = arg;
 723
 724         KKASSERT(lockowned(&sc->sc_lock));
 725
 726         /*
 727          * Only read status while the device is not opened, due to
 728          * possible hardware or firmware bug in some printers.
 729          */
 730         if (sc->sc_fflags == 0)
 731                 usbd_transfer_start(sc->sc_xfer[ULPT_INTR_DT_RD]);
 732
 733         usb_callout_reset(&sc->sc_watchdog,
 734             hz, &ulpt_watchdog, sc);
 735 }
 736
 737 static devclass_t ulpt_devclass;
 738
 739 static device_method_t ulpt_methods[] = {
 740         DEVMETHOD(device_probe, ulpt_probe),
 741         DEVMETHOD(device_attach, ulpt_attach),
 742         DEVMETHOD(device_detach, ulpt_detach),
 743         DEVMETHOD_END
 744 };
 745
 746 static driver_t ulpt_driver = {
 747         .name = "ulpt",
 748         .methods = ulpt_methods,
 749         .size = sizeof(struct ulpt_softc),
 750 };
 751
 752 DRIVER_MODULE(ulpt, uhub, ulpt_driver, ulpt_devclass, NULL, 0);
 753 MODULE_DEPEND(ulpt, usb, 1, 1, 1);
 754 MODULE_VERSION(ulpt, 1);