ulpt.c revision 212122
1#include <sys/cdefs.h> 2__FBSDID("$FreeBSD: head/sys/dev/usb/serial/ulpt.c 212122 2010-09-01 23:47:53Z thompsa $"); 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 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36/* 37 * Printer Class spec: http://www.usb.org/developers/data/devclass/usbprint109.PDF 38 * Printer Class spec: http://www.usb.org/developers/devclass_docs/usbprint11.pdf 39 */ 40 41#include <sys/stdint.h> 42#include <sys/stddef.h> 43#include <sys/param.h> 44#include <sys/queue.h> 45#include <sys/types.h> 46#include <sys/systm.h> 47#include <sys/kernel.h> 48#include <sys/bus.h> 49#include <sys/linker_set.h> 50#include <sys/module.h> 51#include <sys/lock.h> 52#include <sys/mutex.h> 53#include <sys/condvar.h> 54#include <sys/sysctl.h> 55#include <sys/sx.h> 56#include <sys/unistd.h> 57#include <sys/callout.h> 58#include <sys/malloc.h> 59#include <sys/priv.h> 60#include <sys/syslog.h> 61#include <sys/selinfo.h> 62#include <sys/conf.h> 63#include <sys/fcntl.h> 64 65#include <dev/usb/usb.h> 66#include <dev/usb/usbdi.h> 67#include <dev/usb/usbdi_util.h> 68#include <dev/usb/usbhid.h> 69#include "usbdevs.h" 70 71#define USB_DEBUG_VAR ulpt_debug 72#include <dev/usb/usb_debug.h> 73#include <dev/usb/usb_process.h> 74 75#ifdef USB_DEBUG 76static int ulpt_debug = 0; 77 78SYSCTL_NODE(_hw_usb, OID_AUTO, ulpt, CTLFLAG_RW, 0, "USB ulpt"); 79SYSCTL_INT(_hw_usb_ulpt, OID_AUTO, debug, CTLFLAG_RW, 80 &ulpt_debug, 0, "Debug level"); 81#endif 82 83#define ULPT_BSIZE (1<<15) /* bytes */ 84#define ULPT_IFQ_MAXLEN 2 /* units */ 85 86#define UR_GET_DEVICE_ID 0x00 87#define UR_GET_PORT_STATUS 0x01 88#define UR_SOFT_RESET 0x02 89 90#define LPS_NERR 0x08 /* printer no error */ 91#define LPS_SELECT 0x10 /* printer selected */ 92#define LPS_NOPAPER 0x20 /* printer out of paper */ 93#define LPS_INVERT (LPS_SELECT|LPS_NERR) 94#define LPS_MASK (LPS_SELECT|LPS_NERR|LPS_NOPAPER) 95 96enum { 97 ULPT_BULK_DT_WR, 98 ULPT_BULK_DT_RD, 99 ULPT_INTR_DT_RD, 100 ULPT_N_TRANSFER, 101}; 102 103struct ulpt_softc { 104 struct usb_fifo_sc sc_fifo; 105 struct usb_fifo_sc sc_fifo_noreset; 106 struct mtx sc_mtx; 107 struct usb_callout sc_watchdog; 108 109 device_t sc_dev; 110 struct usb_device *sc_udev; 111 struct usb_fifo *sc_fifo_open[2]; 112 struct usb_xfer *sc_xfer[ULPT_N_TRANSFER]; 113 114 int sc_fflags; /* current open flags, FREAD and 115 * FWRITE */ 116 uint8_t sc_iface_no; 117 uint8_t sc_last_status; 118 uint8_t sc_zlps; /* number of consequtive zero length 119 * packets received */ 120}; 121 122/* prototypes */ 123 124static device_probe_t ulpt_probe; 125static device_attach_t ulpt_attach; 126static device_detach_t ulpt_detach; 127 128static usb_callback_t ulpt_write_callback; 129static usb_callback_t ulpt_read_callback; 130static usb_callback_t ulpt_status_callback; 131 132static void ulpt_reset(struct ulpt_softc *); 133static void ulpt_watchdog(void *); 134 135static usb_fifo_close_t ulpt_close; 136static usb_fifo_cmd_t ulpt_start_read; 137static usb_fifo_cmd_t ulpt_start_write; 138static usb_fifo_cmd_t ulpt_stop_read; 139static usb_fifo_cmd_t ulpt_stop_write; 140static usb_fifo_ioctl_t ulpt_ioctl; 141static usb_fifo_open_t ulpt_open; 142static usb_fifo_open_t unlpt_open; 143 144static struct usb_fifo_methods ulpt_fifo_methods = { 145 .f_close = &ulpt_close, 146 .f_ioctl = &ulpt_ioctl, 147 .f_open = &ulpt_open, 148 .f_start_read = &ulpt_start_read, 149 .f_start_write = &ulpt_start_write, 150 .f_stop_read = &ulpt_stop_read, 151 .f_stop_write = &ulpt_stop_write, 152 .basename[0] = "ulpt", 153}; 154 155static struct usb_fifo_methods unlpt_fifo_methods = { 156 .f_close = &ulpt_close, 157 .f_ioctl = &ulpt_ioctl, 158 .f_open = &unlpt_open, 159 .f_start_read = &ulpt_start_read, 160 .f_start_write = &ulpt_start_write, 161 .f_stop_read = &ulpt_stop_read, 162 .f_stop_write = &ulpt_stop_write, 163 .basename[0] = "unlpt", 164}; 165 166static void 167ulpt_reset(struct ulpt_softc *sc) 168{ 169 struct usb_device_request req; 170 171 DPRINTFN(2, "\n"); 172 173 req.bRequest = UR_SOFT_RESET; 174 USETW(req.wValue, 0); 175 USETW(req.wIndex, sc->sc_iface_no); 176 USETW(req.wLength, 0); 177 178 /* 179 * There was a mistake in the USB printer 1.0 spec that gave the 180 * request type as UT_WRITE_CLASS_OTHER; it should have been 181 * UT_WRITE_CLASS_INTERFACE. Many printers use the old one, 182 * so we try both. 183 */ 184 185 mtx_lock(&sc->sc_mtx); 186 req.bmRequestType = UT_WRITE_CLASS_OTHER; 187 if (usbd_do_request_flags(sc->sc_udev, &sc->sc_mtx, 188 &req, NULL, 0, NULL, 2 * USB_MS_HZ)) { /* 1.0 */ 189 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 190 if (usbd_do_request_flags(sc->sc_udev, &sc->sc_mtx, 191 &req, NULL, 0, NULL, 2 * USB_MS_HZ)) { /* 1.1 */ 192 /* ignore error */ 193 } 194 } 195 mtx_unlock(&sc->sc_mtx); 196} 197 198static void 199ulpt_write_callback(struct usb_xfer *xfer, usb_error_t error) 200{ 201 struct ulpt_softc *sc = usbd_xfer_softc(xfer); 202 struct usb_fifo *f = sc->sc_fifo_open[USB_FIFO_TX]; 203 struct usb_page_cache *pc; 204 int actlen, max; 205 206 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 207 208 if (f == NULL) { 209 /* should not happen */ 210 DPRINTF("no FIFO\n"); 211 return; 212 } 213 DPRINTF("state=0x%x actlen=%d\n", USB_GET_STATE(xfer), actlen); 214 215 switch (USB_GET_STATE(xfer)) { 216 case USB_ST_TRANSFERRED: 217 case USB_ST_SETUP: 218tr_setup: 219 pc = usbd_xfer_get_frame(xfer, 0); 220 max = usbd_xfer_max_len(xfer); 221 if (usb_fifo_get_data(f, pc, 0, max, &actlen, 0)) { 222 usbd_xfer_set_frame_len(xfer, 0, actlen); 223 usbd_transfer_submit(xfer); 224 } 225 break; 226 227 default: /* Error */ 228 if (error != USB_ERR_CANCELLED) { 229 /* try to clear stall first */ 230 usbd_xfer_set_stall(xfer); 231 goto tr_setup; 232 } 233 break; 234 } 235} 236 237static void 238ulpt_read_callback(struct usb_xfer *xfer, usb_error_t error) 239{ 240 struct ulpt_softc *sc = usbd_xfer_softc(xfer); 241 struct usb_fifo *f = sc->sc_fifo_open[USB_FIFO_RX]; 242 struct usb_page_cache *pc; 243 int actlen; 244 245 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 246 247 if (f == NULL) { 248 /* should not happen */ 249 DPRINTF("no FIFO\n"); 250 return; 251 } 252 DPRINTF("state=0x%x\n", USB_GET_STATE(xfer)); 253 254 switch (USB_GET_STATE(xfer)) { 255 case USB_ST_TRANSFERRED: 256 257 if (actlen == 0) { 258 259 if (sc->sc_zlps == 4) { 260 /* enable BULK throttle */ 261 usbd_xfer_set_interval(xfer, 500); /* ms */ 262 } else { 263 sc->sc_zlps++; 264 } 265 } else { 266 /* disable BULK throttle */ 267 268 usbd_xfer_set_interval(xfer, 0); 269 sc->sc_zlps = 0; 270 } 271 272 pc = usbd_xfer_get_frame(xfer, 0); 273 usb_fifo_put_data(f, pc, 0, actlen, 1); 274 275 case USB_ST_SETUP: 276tr_setup: 277 if (usb_fifo_put_bytes_max(f) != 0) { 278 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 279 usbd_transfer_submit(xfer); 280 } 281 break; 282 283 default: /* Error */ 284 /* disable BULK throttle */ 285 usbd_xfer_set_interval(xfer, 0); 286 sc->sc_zlps = 0; 287 288 if (error != USB_ERR_CANCELLED) { 289 /* try to clear stall first */ 290 usbd_xfer_set_stall(xfer); 291 goto tr_setup; 292 } 293 break; 294 } 295} 296 297static void 298ulpt_status_callback(struct usb_xfer *xfer, usb_error_t error) 299{ 300 struct ulpt_softc *sc = usbd_xfer_softc(xfer); 301 struct usb_device_request req; 302 struct usb_page_cache *pc; 303 uint8_t cur_status; 304 uint8_t new_status; 305 306 switch (USB_GET_STATE(xfer)) { 307 case USB_ST_TRANSFERRED: 308 309 pc = usbd_xfer_get_frame(xfer, 1); 310 usbd_copy_out(pc, 0, &cur_status, 1); 311 312 cur_status = (cur_status ^ LPS_INVERT) & LPS_MASK; 313 new_status = cur_status & ~sc->sc_last_status; 314 sc->sc_last_status = cur_status; 315 316 if (new_status & LPS_SELECT) 317 log(LOG_NOTICE, "%s: offline\n", 318 device_get_nameunit(sc->sc_dev)); 319 else if (new_status & LPS_NOPAPER) 320 log(LOG_NOTICE, "%s: out of paper\n", 321 device_get_nameunit(sc->sc_dev)); 322 else if (new_status & LPS_NERR) 323 log(LOG_NOTICE, "%s: output error\n", 324 device_get_nameunit(sc->sc_dev)); 325 break; 326 327 case USB_ST_SETUP: 328 req.bmRequestType = UT_READ_CLASS_INTERFACE; 329 req.bRequest = UR_GET_PORT_STATUS; 330 USETW(req.wValue, 0); 331 req.wIndex[0] = sc->sc_iface_no; 332 req.wIndex[1] = 0; 333 USETW(req.wLength, 1); 334 335 pc = usbd_xfer_get_frame(xfer, 0); 336 usbd_copy_in(pc, 0, &req, sizeof(req)); 337 338 usbd_xfer_set_frame_len(xfer, 0, sizeof(req)); 339 usbd_xfer_set_frame_len(xfer, 1, 1); 340 usbd_xfer_set_frames(xfer, 2); 341 usbd_transfer_submit(xfer); 342 break; 343 344 default: /* Error */ 345 DPRINTF("error=%s\n", usbd_errstr(error)); 346 if (error != USB_ERR_CANCELLED) { 347 /* wait for next watchdog timeout */ 348 } 349 break; 350 } 351} 352 353static const struct usb_config ulpt_config[ULPT_N_TRANSFER] = { 354 [ULPT_BULK_DT_WR] = { 355 .type = UE_BULK, 356 .endpoint = UE_ADDR_ANY, 357 .direction = UE_DIR_OUT, 358 .bufsize = ULPT_BSIZE, 359 .flags = {.pipe_bof = 1,.proxy_buffer = 1}, 360 .callback = &ulpt_write_callback, 361 }, 362 363 [ULPT_BULK_DT_RD] = { 364 .type = UE_BULK, 365 .endpoint = UE_ADDR_ANY, 366 .direction = UE_DIR_IN, 367 .bufsize = ULPT_BSIZE, 368 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,.proxy_buffer = 1}, 369 .callback = &ulpt_read_callback, 370 }, 371 372 [ULPT_INTR_DT_RD] = { 373 .type = UE_CONTROL, 374 .endpoint = 0x00, /* Control pipe */ 375 .direction = UE_DIR_ANY, 376 .bufsize = sizeof(struct usb_device_request) + 1, 377 .callback = &ulpt_status_callback, 378 .timeout = 1000, /* 1 second */ 379 }, 380}; 381 382static void 383ulpt_start_read(struct usb_fifo *fifo) 384{ 385 struct ulpt_softc *sc = usb_fifo_softc(fifo); 386 387 usbd_transfer_start(sc->sc_xfer[ULPT_BULK_DT_RD]); 388} 389 390static void 391ulpt_stop_read(struct usb_fifo *fifo) 392{ 393 struct ulpt_softc *sc = usb_fifo_softc(fifo); 394 395 usbd_transfer_stop(sc->sc_xfer[ULPT_BULK_DT_RD]); 396} 397 398static void 399ulpt_start_write(struct usb_fifo *fifo) 400{ 401 struct ulpt_softc *sc = usb_fifo_softc(fifo); 402 403 usbd_transfer_start(sc->sc_xfer[ULPT_BULK_DT_WR]); 404} 405 406static void 407ulpt_stop_write(struct usb_fifo *fifo) 408{ 409 struct ulpt_softc *sc = usb_fifo_softc(fifo); 410 411 usbd_transfer_stop(sc->sc_xfer[ULPT_BULK_DT_WR]); 412} 413 414static int 415ulpt_open(struct usb_fifo *fifo, int fflags) 416{ 417 struct ulpt_softc *sc = usb_fifo_softc(fifo); 418 419 /* we assume that open is a serial process */ 420 421 if (sc->sc_fflags == 0) { 422 423 /* reset USB paralell port */ 424 425 ulpt_reset(sc); 426 } 427 return (unlpt_open(fifo, fflags)); 428} 429 430static int 431unlpt_open(struct usb_fifo *fifo, int fflags) 432{ 433 struct ulpt_softc *sc = usb_fifo_softc(fifo); 434 435 if (sc->sc_fflags & fflags) { 436 return (EBUSY); 437 } 438 if (fflags & FREAD) { 439 /* clear stall first */ 440 mtx_lock(&sc->sc_mtx); 441 usbd_xfer_set_stall(sc->sc_xfer[ULPT_BULK_DT_RD]); 442 mtx_unlock(&sc->sc_mtx); 443 if (usb_fifo_alloc_buffer(fifo, 444 usbd_xfer_max_len(sc->sc_xfer[ULPT_BULK_DT_RD]), 445 ULPT_IFQ_MAXLEN)) { 446 return (ENOMEM); 447 } 448 /* set which FIFO is opened */ 449 sc->sc_fifo_open[USB_FIFO_RX] = fifo; 450 } 451 if (fflags & FWRITE) { 452 /* clear stall first */ 453 mtx_lock(&sc->sc_mtx); 454 usbd_xfer_set_stall(sc->sc_xfer[ULPT_BULK_DT_WR]); 455 mtx_unlock(&sc->sc_mtx); 456 if (usb_fifo_alloc_buffer(fifo, 457 usbd_xfer_max_len(sc->sc_xfer[ULPT_BULK_DT_WR]), 458 ULPT_IFQ_MAXLEN)) { 459 return (ENOMEM); 460 } 461 /* set which FIFO is opened */ 462 sc->sc_fifo_open[USB_FIFO_TX] = fifo; 463 } 464 sc->sc_fflags |= fflags & (FREAD | FWRITE); 465 return (0); 466} 467 468static void 469ulpt_close(struct usb_fifo *fifo, int fflags) 470{ 471 struct ulpt_softc *sc = usb_fifo_softc(fifo); 472 473 sc->sc_fflags &= ~(fflags & (FREAD | FWRITE)); 474 475 if (fflags & (FREAD | FWRITE)) { 476 usb_fifo_free_buffer(fifo); 477 } 478} 479 480static int 481ulpt_ioctl(struct usb_fifo *fifo, u_long cmd, void *data, 482 int fflags) 483{ 484 return (ENODEV); 485} 486 487static int 488ulpt_probe(device_t dev) 489{ 490 struct usb_attach_arg *uaa = device_get_ivars(dev); 491 492 DPRINTFN(11, "\n"); 493 494 if (uaa->usb_mode != USB_MODE_HOST) { 495 return (ENXIO); 496 } 497 if ((uaa->info.bInterfaceClass == UICLASS_PRINTER) && 498 (uaa->info.bInterfaceSubClass == UISUBCLASS_PRINTER) && 499 ((uaa->info.bInterfaceProtocol == UIPROTO_PRINTER_UNI) || 500 (uaa->info.bInterfaceProtocol == UIPROTO_PRINTER_BI) || 501 (uaa->info.bInterfaceProtocol == UIPROTO_PRINTER_1284))) { 502 return (0); 503 } 504 return (ENXIO); 505} 506 507static int 508ulpt_attach(device_t dev) 509{ 510 struct usb_attach_arg *uaa = device_get_ivars(dev); 511 struct ulpt_softc *sc = device_get_softc(dev); 512 struct usb_interface_descriptor *id; 513 int unit = device_get_unit(dev); 514 int error; 515 uint8_t iface_index = uaa->info.bIfaceIndex; 516 uint8_t alt_index; 517 518 DPRINTFN(11, "sc=%p\n", sc); 519 520 sc->sc_dev = dev; 521 sc->sc_udev = uaa->device; 522 523 device_set_usb_desc(dev); 524 525 mtx_init(&sc->sc_mtx, "ulpt lock", NULL, MTX_DEF | MTX_RECURSE); 526 527 usb_callout_init_mtx(&sc->sc_watchdog, &sc->sc_mtx, 0); 528 529 /* search through all the descriptors looking for bidir mode */ 530 531 id = usbd_get_interface_descriptor(uaa->iface); 532 alt_index = 0 - 1; 533 while (1) { 534 if (id == NULL) { 535 break; 536 } 537 if ((id->bDescriptorType == UDESC_INTERFACE) && 538 (id->bLength >= sizeof(*id))) { 539 if (id->bInterfaceNumber != uaa->info.bIfaceNum) { 540 break; 541 } else { 542 alt_index++; 543 if ((id->bInterfaceClass == UICLASS_PRINTER) && 544 (id->bInterfaceSubClass == UISUBCLASS_PRINTER) && 545 (id->bInterfaceProtocol == UIPROTO_PRINTER_BI)) { 546 goto found; 547 } 548 } 549 } 550 id = (void *)usb_desc_foreach( 551 usbd_get_config_descriptor(uaa->device), (void *)id); 552 } 553 goto detach; 554 555found: 556 557 DPRINTF("setting alternate " 558 "config number: %d\n", alt_index); 559 560 if (alt_index) { 561 562 error = usbd_set_alt_interface_index 563 (uaa->device, iface_index, alt_index); 564 565 if (error) { 566 DPRINTF("could not set alternate " 567 "config, error=%s\n", usbd_errstr(error)); 568 goto detach; 569 } 570 } 571 sc->sc_iface_no = id->bInterfaceNumber; 572 573 error = usbd_transfer_setup(uaa->device, &iface_index, 574 sc->sc_xfer, ulpt_config, ULPT_N_TRANSFER, 575 sc, &sc->sc_mtx); 576 if (error) { 577 DPRINTF("error=%s\n", usbd_errstr(error)); 578 goto detach; 579 } 580 device_printf(sc->sc_dev, "using bi-directional mode\n"); 581 582#if 0 583/* 584 * This code is disabled because for some mysterious reason it causes 585 * printing not to work. But only sometimes, and mostly with 586 * UHCI and less often with OHCI. *sigh* 587 */ 588 { 589 struct usb_config_descriptor *cd = usbd_get_config_descriptor(dev); 590 struct usb_device_request req; 591 int len, alen; 592 593 req.bmRequestType = UT_READ_CLASS_INTERFACE; 594 req.bRequest = UR_GET_DEVICE_ID; 595 USETW(req.wValue, cd->bConfigurationValue); 596 USETW2(req.wIndex, id->bInterfaceNumber, id->bAlternateSetting); 597 USETW(req.wLength, sizeof devinfo - 1); 598 error = usbd_do_request_flags(dev, &req, devinfo, USB_SHORT_XFER_OK, 599 &alen, USB_DEFAULT_TIMEOUT); 600 if (error) { 601 device_printf(sc->sc_dev, "cannot get device id\n"); 602 } else if (alen <= 2) { 603 device_printf(sc->sc_dev, "empty device id, no " 604 "printer connected?\n"); 605 } else { 606 /* devinfo now contains an IEEE-1284 device ID */ 607 len = ((devinfo[0] & 0xff) << 8) | (devinfo[1] & 0xff); 608 if (len > sizeof devinfo - 3) 609 len = sizeof devinfo - 3; 610 devinfo[len] = 0; 611 printf("%s: device id <", device_get_nameunit(sc->sc_dev)); 612 ieee1284_print_id(devinfo + 2); 613 printf(">\n"); 614 } 615 } 616#endif 617 618 error = usb_fifo_attach(uaa->device, sc, &sc->sc_mtx, 619 &ulpt_fifo_methods, &sc->sc_fifo, 620 unit, 0 - 1, uaa->info.bIfaceIndex, 621 UID_ROOT, GID_OPERATOR, 0644); 622 if (error) { 623 goto detach; 624 } 625 error = usb_fifo_attach(uaa->device, sc, &sc->sc_mtx, 626 &unlpt_fifo_methods, &sc->sc_fifo_noreset, 627 unit, 0 - 1, uaa->info.bIfaceIndex, 628 UID_ROOT, GID_OPERATOR, 0644); 629 if (error) { 630 goto detach; 631 } 632 /* start reading of status */ 633 634 mtx_lock(&sc->sc_mtx); 635 ulpt_watchdog(sc); 636 mtx_unlock(&sc->sc_mtx); 637 return (0); 638 639detach: 640 ulpt_detach(dev); 641 return (ENOMEM); 642} 643 644static int 645ulpt_detach(device_t dev) 646{ 647 struct ulpt_softc *sc = device_get_softc(dev); 648 649 DPRINTF("sc=%p\n", sc); 650 651 usb_fifo_detach(&sc->sc_fifo); 652 usb_fifo_detach(&sc->sc_fifo_noreset); 653 654 mtx_lock(&sc->sc_mtx); 655 usb_callout_stop(&sc->sc_watchdog); 656 mtx_unlock(&sc->sc_mtx); 657 658 usbd_transfer_unsetup(sc->sc_xfer, ULPT_N_TRANSFER); 659 usb_callout_drain(&sc->sc_watchdog); 660 mtx_destroy(&sc->sc_mtx); 661 662 return (0); 663} 664 665#if 0 666/* XXX This does not belong here. */ 667 668/* 669 * Compare two strings until the second ends. 670 */ 671 672static uint8_t 673ieee1284_compare(const char *a, const char *b) 674{ 675 while (1) { 676 677 if (*b == 0) { 678 break; 679 } 680 if (*a != *b) { 681 return 1; 682 } 683 b++; 684 a++; 685 } 686 return 0; 687} 688 689/* 690 * Print select parts of an IEEE 1284 device ID. 691 */ 692void 693ieee1284_print_id(char *str) 694{ 695 char *p, *q; 696 697 for (p = str - 1; p; p = strchr(p, ';')) { 698 p++; /* skip ';' */ 699 if (ieee1284_compare(p, "MFG:") == 0 || 700 ieee1284_compare(p, "MANUFACTURER:") == 0 || 701 ieee1284_compare(p, "MDL:") == 0 || 702 ieee1284_compare(p, "MODEL:") == 0) { 703 q = strchr(p, ';'); 704 if (q) 705 printf("%.*s", (int)(q - p + 1), p); 706 } 707 } 708} 709 710#endif 711 712static void 713ulpt_watchdog(void *arg) 714{ 715 struct ulpt_softc *sc = arg; 716 717 mtx_assert(&sc->sc_mtx, MA_OWNED); 718 719 /* 720 * Only read status while the device is not opened, due to 721 * possible hardware or firmware bug in some printers. 722 */ 723 if (sc->sc_fflags == 0) 724 usbd_transfer_start(sc->sc_xfer[ULPT_INTR_DT_RD]); 725 726 usb_callout_reset(&sc->sc_watchdog, 727 hz, &ulpt_watchdog, sc); 728} 729 730static devclass_t ulpt_devclass; 731 732static device_method_t ulpt_methods[] = { 733 DEVMETHOD(device_probe, ulpt_probe), 734 DEVMETHOD(device_attach, ulpt_attach), 735 DEVMETHOD(device_detach, ulpt_detach), 736 {0, 0} 737}; 738 739static driver_t ulpt_driver = { 740 .name = "ulpt", 741 .methods = ulpt_methods, 742 .size = sizeof(struct ulpt_softc), 743}; 744 745DRIVER_MODULE(ulpt, uhub, ulpt_driver, ulpt_devclass, NULL, 0); 746MODULE_DEPEND(ulpt, usb, 1, 1, 1); 747MODULE_DEPEND(ulpt, ucom, 1, 1, 1); 748MODULE_VERSION(ulpt, 1); 749