1/*****************************************************************************/ 2 3/* 4 * uss720.c -- USS720 USB Parport Cable. 5 * 6 * Copyright (C) 1999, 2005, 2010 7 * Thomas Sailer (t.sailer@alumni.ethz.ch) 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 * 23 * Based on parport_pc.c 24 * 25 * History: 26 * 0.1 04.08.1999 Created 27 * 0.2 07.08.1999 Some fixes mainly suggested by Tim Waugh 28 * Interrupt handling currently disabled because 29 * usb_request_irq crashes somewhere within ohci.c 30 * for no apparent reason (that is for me, anyway) 31 * ECP currently untested 32 * 0.3 10.08.1999 fixing merge errors 33 * 0.4 13.08.1999 Added Vendor/Product ID of Brad Hard's cable 34 * 0.5 20.09.1999 usb_control_msg wrapper used 35 * Nov01.2000 usb_device_table support by Adam J. Richter 36 * 08.04.2001 Identify version on module load. gb 37 * 0.6 02.09.2005 Fix "scheduling in interrupt" problem by making save/restore 38 * context asynchronous 39 * 40 */ 41 42/*****************************************************************************/ 43 44#include <linux/module.h> 45#include <linux/socket.h> 46#include <linux/parport.h> 47#include <linux/init.h> 48#include <linux/usb.h> 49#include <linux/delay.h> 50#include <linux/completion.h> 51#include <linux/kref.h> 52#include <linux/slab.h> 53 54/* 55 * Version Information 56 */ 57#define DRIVER_VERSION "v0.6" 58#define DRIVER_AUTHOR "Thomas M. Sailer, t.sailer@alumni.ethz.ch" 59#define DRIVER_DESC "USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip" 60 61/* --------------------------------------------------------------------- */ 62 63struct parport_uss720_private { 64 struct usb_device *usbdev; 65 struct parport *pp; 66 struct kref ref_count; 67 __u8 reg[7]; /* USB registers */ 68 struct list_head asynclist; 69 spinlock_t asynclock; 70}; 71 72struct uss720_async_request { 73 struct parport_uss720_private *priv; 74 struct kref ref_count; 75 struct list_head asynclist; 76 struct completion compl; 77 struct urb *urb; 78 struct usb_ctrlrequest dr; 79 __u8 reg[7]; 80}; 81 82/* --------------------------------------------------------------------- */ 83 84static void destroy_priv(struct kref *kref) 85{ 86 struct parport_uss720_private *priv = container_of(kref, struct parport_uss720_private, ref_count); 87 88 usb_put_dev(priv->usbdev); 89 kfree(priv); 90 dbg("destroying priv datastructure"); 91} 92 93static void destroy_async(struct kref *kref) 94{ 95 struct uss720_async_request *rq = container_of(kref, struct uss720_async_request, ref_count); 96 struct parport_uss720_private *priv = rq->priv; 97 unsigned long flags; 98 99 if (likely(rq->urb)) 100 usb_free_urb(rq->urb); 101 spin_lock_irqsave(&priv->asynclock, flags); 102 list_del_init(&rq->asynclist); 103 spin_unlock_irqrestore(&priv->asynclock, flags); 104 kfree(rq); 105 kref_put(&priv->ref_count, destroy_priv); 106} 107 108/* --------------------------------------------------------------------- */ 109 110static void async_complete(struct urb *urb) 111{ 112 struct uss720_async_request *rq; 113 struct parport *pp; 114 struct parport_uss720_private *priv; 115 int status = urb->status; 116 117 rq = urb->context; 118 priv = rq->priv; 119 pp = priv->pp; 120 if (status) { 121 err("async_complete: urb error %d", status); 122 } else if (rq->dr.bRequest == 3) { 123 memcpy(priv->reg, rq->reg, sizeof(priv->reg)); 124 /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */ 125 if (rq->reg[2] & rq->reg[1] & 0x10 && pp) 126 parport_generic_irq(pp); 127 } 128 complete(&rq->compl); 129 kref_put(&rq->ref_count, destroy_async); 130} 131 132static struct uss720_async_request *submit_async_request(struct parport_uss720_private *priv, 133 __u8 request, __u8 requesttype, __u16 value, __u16 index, 134 gfp_t mem_flags) 135{ 136 struct usb_device *usbdev; 137 struct uss720_async_request *rq; 138 unsigned long flags; 139 int ret; 140 141 if (!priv) 142 return NULL; 143 usbdev = priv->usbdev; 144 if (!usbdev) 145 return NULL; 146 rq = kmalloc(sizeof(struct uss720_async_request), mem_flags); 147 if (!rq) { 148 err("submit_async_request out of memory"); 149 return NULL; 150 } 151 kref_init(&rq->ref_count); 152 INIT_LIST_HEAD(&rq->asynclist); 153 init_completion(&rq->compl); 154 kref_get(&priv->ref_count); 155 rq->priv = priv; 156 rq->urb = usb_alloc_urb(0, mem_flags); 157 if (!rq->urb) { 158 kref_put(&rq->ref_count, destroy_async); 159 err("submit_async_request out of memory"); 160 return NULL; 161 } 162 rq->dr.bRequestType = requesttype; 163 rq->dr.bRequest = request; 164 rq->dr.wValue = cpu_to_le16(value); 165 rq->dr.wIndex = cpu_to_le16(index); 166 rq->dr.wLength = cpu_to_le16((request == 3) ? sizeof(rq->reg) : 0); 167 usb_fill_control_urb(rq->urb, usbdev, (requesttype & 0x80) ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0), 168 (unsigned char *)&rq->dr, 169 (request == 3) ? rq->reg : NULL, (request == 3) ? sizeof(rq->reg) : 0, async_complete, rq); 170 /* rq->urb->transfer_flags |= URB_ASYNC_UNLINK; */ 171 spin_lock_irqsave(&priv->asynclock, flags); 172 list_add_tail(&rq->asynclist, &priv->asynclist); 173 spin_unlock_irqrestore(&priv->asynclock, flags); 174 ret = usb_submit_urb(rq->urb, mem_flags); 175 if (!ret) { 176 kref_get(&rq->ref_count); 177 return rq; 178 } 179 kref_put(&rq->ref_count, destroy_async); 180 err("submit_async_request submit_urb failed with %d", ret); 181 return NULL; 182} 183 184static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv) 185{ 186 struct uss720_async_request *rq; 187 unsigned long flags; 188 unsigned int ret = 0; 189 190 spin_lock_irqsave(&priv->asynclock, flags); 191 list_for_each_entry(rq, &priv->asynclist, asynclist) { 192 usb_unlink_urb(rq->urb); 193 ret++; 194 } 195 spin_unlock_irqrestore(&priv->asynclock, flags); 196 return ret; 197} 198 199/* --------------------------------------------------------------------- */ 200 201static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags) 202{ 203 struct parport_uss720_private *priv; 204 struct uss720_async_request *rq; 205 static const unsigned char regindex[9] = { 206 4, 0, 1, 5, 5, 0, 2, 3, 6 207 }; 208 int ret; 209 210 if (!pp) 211 return -EIO; 212 priv = pp->private_data; 213 rq = submit_async_request(priv, 3, 0xc0, ((unsigned int)reg) << 8, 0, mem_flags); 214 if (!rq) { 215 err("get_1284_register(%u) failed", (unsigned int)reg); 216 return -EIO; 217 } 218 if (!val) { 219 kref_put(&rq->ref_count, destroy_async); 220 return 0; 221 } 222 if (wait_for_completion_timeout(&rq->compl, HZ)) { 223 ret = rq->urb->status; 224 *val = priv->reg[(reg >= 9) ? 0 : regindex[reg]]; 225 if (ret) 226 printk(KERN_WARNING "get_1284_register: " 227 "usb error %d\n", ret); 228 kref_put(&rq->ref_count, destroy_async); 229 return ret; 230 } 231 printk(KERN_WARNING "get_1284_register timeout\n"); 232 kill_all_async_requests_priv(priv); 233 return -EIO; 234} 235 236static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags) 237{ 238 struct parport_uss720_private *priv; 239 struct uss720_async_request *rq; 240 241 if (!pp) 242 return -EIO; 243 priv = pp->private_data; 244 rq = submit_async_request(priv, 4, 0x40, (((unsigned int)reg) << 8) | val, 0, mem_flags); 245 if (!rq) { 246 err("set_1284_register(%u,%u) failed", (unsigned int)reg, (unsigned int)val); 247 return -EIO; 248 } 249 kref_put(&rq->ref_count, destroy_async); 250 return 0; 251} 252 253/* --------------------------------------------------------------------- */ 254 255/* ECR modes */ 256#define ECR_SPP 00 257#define ECR_PS2 01 258#define ECR_PPF 02 259#define ECR_ECP 03 260#define ECR_EPP 04 261 262/* Safely change the mode bits in the ECR */ 263static int change_mode(struct parport *pp, int m) 264{ 265 struct parport_uss720_private *priv = pp->private_data; 266 int mode; 267 __u8 reg; 268 269 if (get_1284_register(pp, 6, ®, GFP_KERNEL)) 270 return -EIO; 271 /* Bits <7:5> contain the mode. */ 272 mode = (priv->reg[2] >> 5) & 0x7; 273 if (mode == m) 274 return 0; 275 /* We have to go through mode 000 or 001 */ 276 if (mode > ECR_PS2 && m > ECR_PS2) 277 if (change_mode(pp, ECR_PS2)) 278 return -EIO; 279 280 if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) { 281 /* This mode resets the FIFO, so we may 282 * have to wait for it to drain first. */ 283 unsigned long expire = jiffies + pp->physport->cad->timeout; 284 switch (mode) { 285 case ECR_PPF: /* Parallel Port FIFO mode */ 286 case ECR_ECP: /* ECP Parallel Port mode */ 287 /* Poll slowly. */ 288 for (;;) { 289 if (get_1284_register(pp, 6, ®, GFP_KERNEL)) 290 return -EIO; 291 if (priv->reg[2] & 0x01) 292 break; 293 if (time_after_eq (jiffies, expire)) 294 /* The FIFO is stuck. */ 295 return -EBUSY; 296 msleep_interruptible(10); 297 if (signal_pending (current)) 298 break; 299 } 300 } 301 } 302 /* Set the mode. */ 303 if (set_1284_register(pp, 6, m << 5, GFP_KERNEL)) 304 return -EIO; 305 if (get_1284_register(pp, 6, ®, GFP_KERNEL)) 306 return -EIO; 307 return 0; 308} 309 310/* 311 * Clear TIMEOUT BIT in EPP MODE 312 */ 313static int clear_epp_timeout(struct parport *pp) 314{ 315 unsigned char stat; 316 317 if (get_1284_register(pp, 1, &stat, GFP_KERNEL)) 318 return 1; 319 return stat & 1; 320} 321 322/* 323 * Access functions. 324 */ 325 326static void parport_uss720_write_data(struct parport *pp, unsigned char d) 327{ 328 set_1284_register(pp, 0, d, GFP_KERNEL); 329} 330 331static unsigned char parport_uss720_read_data(struct parport *pp) 332{ 333 unsigned char ret; 334 335 if (get_1284_register(pp, 0, &ret, GFP_KERNEL)) 336 return 0; 337 return ret; 338} 339 340static void parport_uss720_write_control(struct parport *pp, unsigned char d) 341{ 342 struct parport_uss720_private *priv = pp->private_data; 343 344 d = (d & 0xf) | (priv->reg[1] & 0xf0); 345 if (set_1284_register(pp, 2, d, GFP_KERNEL)) 346 return; 347 priv->reg[1] = d; 348} 349 350static unsigned char parport_uss720_read_control(struct parport *pp) 351{ 352 struct parport_uss720_private *priv = pp->private_data; 353 return priv->reg[1] & 0xf; /* Use soft copy */ 354} 355 356static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val) 357{ 358 struct parport_uss720_private *priv = pp->private_data; 359 unsigned char d; 360 361 mask &= 0x0f; 362 val &= 0x0f; 363 d = (priv->reg[1] & (~mask)) ^ val; 364 if (set_1284_register(pp, 2, d, GFP_KERNEL)) 365 return 0; 366 priv->reg[1] = d; 367 return d & 0xf; 368} 369 370static unsigned char parport_uss720_read_status(struct parport *pp) 371{ 372 unsigned char ret; 373 374 if (get_1284_register(pp, 1, &ret, GFP_KERNEL)) 375 return 0; 376 return ret & 0xf8; 377} 378 379static void parport_uss720_disable_irq(struct parport *pp) 380{ 381 struct parport_uss720_private *priv = pp->private_data; 382 unsigned char d; 383 384 d = priv->reg[1] & ~0x10; 385 if (set_1284_register(pp, 2, d, GFP_KERNEL)) 386 return; 387 priv->reg[1] = d; 388} 389 390static void parport_uss720_enable_irq(struct parport *pp) 391{ 392 struct parport_uss720_private *priv = pp->private_data; 393 unsigned char d; 394 395 d = priv->reg[1] | 0x10; 396 if (set_1284_register(pp, 2, d, GFP_KERNEL)) 397 return; 398 priv->reg[1] = d; 399} 400 401static void parport_uss720_data_forward (struct parport *pp) 402{ 403 struct parport_uss720_private *priv = pp->private_data; 404 unsigned char d; 405 406 d = priv->reg[1] & ~0x20; 407 if (set_1284_register(pp, 2, d, GFP_KERNEL)) 408 return; 409 priv->reg[1] = d; 410} 411 412static void parport_uss720_data_reverse (struct parport *pp) 413{ 414 struct parport_uss720_private *priv = pp->private_data; 415 unsigned char d; 416 417 d = priv->reg[1] | 0x20; 418 if (set_1284_register(pp, 2, d, GFP_KERNEL)) 419 return; 420 priv->reg[1] = d; 421} 422 423static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s) 424{ 425 s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0); 426 s->u.pc.ecr = 0x24; 427} 428 429static void parport_uss720_save_state(struct parport *pp, struct parport_state *s) 430{ 431 struct parport_uss720_private *priv = pp->private_data; 432 433 s->u.pc.ctr = priv->reg[1]; 434 s->u.pc.ecr = priv->reg[2]; 435} 436 437static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s) 438{ 439 struct parport_uss720_private *priv = pp->private_data; 440 441 set_1284_register(pp, 2, s->u.pc.ctr, GFP_ATOMIC); 442 set_1284_register(pp, 6, s->u.pc.ecr, GFP_ATOMIC); 443 get_1284_register(pp, 2, NULL, GFP_ATOMIC); 444 priv->reg[1] = s->u.pc.ctr; 445 priv->reg[2] = s->u.pc.ecr; 446} 447 448static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags) 449{ 450 struct parport_uss720_private *priv = pp->private_data; 451 size_t got = 0; 452 453 if (change_mode(pp, ECR_EPP)) 454 return 0; 455 for (; got < length; got++) { 456 if (get_1284_register(pp, 4, (char *)buf, GFP_KERNEL)) 457 break; 458 buf++; 459 if (priv->reg[0] & 0x01) { 460 clear_epp_timeout(pp); 461 break; 462 } 463 } 464 change_mode(pp, ECR_PS2); 465 return got; 466} 467 468static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags) 469{ 470 struct parport_uss720_private *priv = pp->private_data; 471 struct usb_device *usbdev = priv->usbdev; 472 int rlen; 473 int i; 474 475 if (!usbdev) 476 return 0; 477 if (change_mode(pp, ECR_EPP)) 478 return 0; 479 i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000); 480 if (i) 481 printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buf, length, rlen); 482 change_mode(pp, ECR_PS2); 483 return rlen; 484} 485 486static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags) 487{ 488 struct parport_uss720_private *priv = pp->private_data; 489 size_t got = 0; 490 491 if (change_mode(pp, ECR_EPP)) 492 return 0; 493 for (; got < length; got++) { 494 if (get_1284_register(pp, 3, (char *)buf, GFP_KERNEL)) 495 break; 496 buf++; 497 if (priv->reg[0] & 0x01) { 498 clear_epp_timeout(pp); 499 break; 500 } 501 } 502 change_mode(pp, ECR_PS2); 503 return got; 504} 505 506static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags) 507{ 508 struct parport_uss720_private *priv = pp->private_data; 509 size_t written = 0; 510 511 if (change_mode(pp, ECR_EPP)) 512 return 0; 513 for (; written < length; written++) { 514 if (set_1284_register(pp, 3, *(char *)buf, GFP_KERNEL)) 515 break; 516 buf++; 517 if (get_1284_register(pp, 1, NULL, GFP_KERNEL)) 518 break; 519 if (priv->reg[0] & 0x01) { 520 clear_epp_timeout(pp); 521 break; 522 } 523 } 524 change_mode(pp, ECR_PS2); 525 return written; 526} 527 528static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags) 529{ 530 struct parport_uss720_private *priv = pp->private_data; 531 struct usb_device *usbdev = priv->usbdev; 532 int rlen; 533 int i; 534 535 if (!usbdev) 536 return 0; 537 if (change_mode(pp, ECR_ECP)) 538 return 0; 539 i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); 540 if (i) 541 printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen); 542 change_mode(pp, ECR_PS2); 543 return rlen; 544} 545 546static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags) 547{ 548 struct parport_uss720_private *priv = pp->private_data; 549 struct usb_device *usbdev = priv->usbdev; 550 int rlen; 551 int i; 552 553 if (!usbdev) 554 return 0; 555 if (change_mode(pp, ECR_ECP)) 556 return 0; 557 i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000); 558 if (i) 559 printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %Zu rlen %u\n", buffer, len, rlen); 560 change_mode(pp, ECR_PS2); 561 return rlen; 562} 563 564static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags) 565{ 566 size_t written = 0; 567 568 if (change_mode(pp, ECR_ECP)) 569 return 0; 570 for (; written < len; written++) { 571 if (set_1284_register(pp, 5, *(char *)buffer, GFP_KERNEL)) 572 break; 573 buffer++; 574 } 575 change_mode(pp, ECR_PS2); 576 return written; 577} 578 579static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags) 580{ 581 struct parport_uss720_private *priv = pp->private_data; 582 struct usb_device *usbdev = priv->usbdev; 583 int rlen; 584 int i; 585 586 if (!usbdev) 587 return 0; 588 if (change_mode(pp, ECR_PPF)) 589 return 0; 590 i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000); 591 if (i) 592 printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen); 593 change_mode(pp, ECR_PS2); 594 return rlen; 595} 596 597/* --------------------------------------------------------------------- */ 598 599static struct parport_operations parport_uss720_ops = 600{ 601 .owner = THIS_MODULE, 602 .write_data = parport_uss720_write_data, 603 .read_data = parport_uss720_read_data, 604 605 .write_control = parport_uss720_write_control, 606 .read_control = parport_uss720_read_control, 607 .frob_control = parport_uss720_frob_control, 608 609 .read_status = parport_uss720_read_status, 610 611 .enable_irq = parport_uss720_enable_irq, 612 .disable_irq = parport_uss720_disable_irq, 613 614 .data_forward = parport_uss720_data_forward, 615 .data_reverse = parport_uss720_data_reverse, 616 617 .init_state = parport_uss720_init_state, 618 .save_state = parport_uss720_save_state, 619 .restore_state = parport_uss720_restore_state, 620 621 .epp_write_data = parport_uss720_epp_write_data, 622 .epp_read_data = parport_uss720_epp_read_data, 623 .epp_write_addr = parport_uss720_epp_write_addr, 624 .epp_read_addr = parport_uss720_epp_read_addr, 625 626 .ecp_write_data = parport_uss720_ecp_write_data, 627 .ecp_read_data = parport_uss720_ecp_read_data, 628 .ecp_write_addr = parport_uss720_ecp_write_addr, 629 630 .compat_write_data = parport_uss720_write_compat, 631 .nibble_read_data = parport_ieee1284_read_nibble, 632 .byte_read_data = parport_ieee1284_read_byte, 633}; 634 635/* --------------------------------------------------------------------- */ 636 637static int uss720_probe(struct usb_interface *intf, 638 const struct usb_device_id *id) 639{ 640 struct usb_device *usbdev = usb_get_dev(interface_to_usbdev(intf)); 641 struct usb_host_interface *interface; 642 struct usb_host_endpoint *endpoint; 643 struct parport_uss720_private *priv; 644 struct parport *pp; 645 unsigned char reg; 646 int i; 647 648 dbg("probe: vendor id 0x%x, device id 0x%x\n", 649 le16_to_cpu(usbdev->descriptor.idVendor), 650 le16_to_cpu(usbdev->descriptor.idProduct)); 651 652 /* our known interfaces have 3 alternate settings */ 653 if (intf->num_altsetting != 3) { 654 usb_put_dev(usbdev); 655 return -ENODEV; 656 } 657 i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2); 658 dbg("set inteface result %d", i); 659 660 interface = intf->cur_altsetting; 661 662 /* 663 * Allocate parport interface 664 */ 665 if (!(priv = kzalloc(sizeof(struct parport_uss720_private), GFP_KERNEL))) { 666 usb_put_dev(usbdev); 667 return -ENOMEM; 668 } 669 priv->pp = NULL; 670 priv->usbdev = usbdev; 671 kref_init(&priv->ref_count); 672 spin_lock_init(&priv->asynclock); 673 INIT_LIST_HEAD(&priv->asynclist); 674 if (!(pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops))) { 675 printk(KERN_WARNING "uss720: could not register parport\n"); 676 goto probe_abort; 677 } 678 679 priv->pp = pp; 680 pp->private_data = priv; 681 pp->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP | PARPORT_MODE_ECP | PARPORT_MODE_COMPAT; 682 683 /* set the USS720 control register to manual mode, no ECP compression, enable all ints */ 684 set_1284_register(pp, 7, 0x00, GFP_KERNEL); 685 set_1284_register(pp, 6, 0x30, GFP_KERNEL); /* PS/2 mode */ 686 set_1284_register(pp, 2, 0x0c, GFP_KERNEL); 687 /* debugging */ 688 get_1284_register(pp, 0, ®, GFP_KERNEL); 689 dbg("reg: %02x %02x %02x %02x %02x %02x %02x", 690 priv->reg[0], priv->reg[1], priv->reg[2], priv->reg[3], priv->reg[4], priv->reg[5], priv->reg[6]); 691 692 endpoint = &interface->endpoint[2]; 693 dbg("epaddr %d interval %d", endpoint->desc.bEndpointAddress, endpoint->desc.bInterval); 694 parport_announce_port(pp); 695 696 usb_set_intfdata(intf, pp); 697 return 0; 698 699probe_abort: 700 kill_all_async_requests_priv(priv); 701 kref_put(&priv->ref_count, destroy_priv); 702 return -ENODEV; 703} 704 705static void uss720_disconnect(struct usb_interface *intf) 706{ 707 struct parport *pp = usb_get_intfdata(intf); 708 struct parport_uss720_private *priv; 709 struct usb_device *usbdev; 710 711 dbg("disconnect"); 712 usb_set_intfdata(intf, NULL); 713 if (pp) { 714 priv = pp->private_data; 715 usbdev = priv->usbdev; 716 priv->usbdev = NULL; 717 priv->pp = NULL; 718 dbg("parport_remove_port"); 719 parport_remove_port(pp); 720 parport_put_port(pp); 721 kill_all_async_requests_priv(priv); 722 kref_put(&priv->ref_count, destroy_priv); 723 } 724 dbg("disconnect done"); 725} 726 727/* table of cables that work through this driver */ 728static const struct usb_device_id uss720_table[] = { 729 { USB_DEVICE(0x047e, 0x1001) }, 730 { USB_DEVICE(0x0557, 0x2001) }, 731 { USB_DEVICE(0x0729, 0x1284) }, 732 { USB_DEVICE(0x1293, 0x0002) }, 733 { USB_DEVICE(0x1293, 0x0002) }, 734 { USB_DEVICE(0x050d, 0x0002) }, 735 { } /* Terminating entry */ 736}; 737 738MODULE_DEVICE_TABLE (usb, uss720_table); 739 740 741static struct usb_driver uss720_driver = { 742 .name = "uss720", 743 .probe = uss720_probe, 744 .disconnect = uss720_disconnect, 745 .id_table = uss720_table, 746}; 747 748/* --------------------------------------------------------------------- */ 749 750MODULE_AUTHOR(DRIVER_AUTHOR); 751MODULE_DESCRIPTION(DRIVER_DESC); 752MODULE_LICENSE("GPL"); 753 754static int __init uss720_init(void) 755{ 756 int retval; 757 retval = usb_register(&uss720_driver); 758 if (retval) 759 goto out; 760 761 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" 762 DRIVER_DESC "\n"); 763 printk(KERN_INFO KBUILD_MODNAME ": NOTE: this is a special purpose " 764 "driver to allow nonstandard\n"); 765 printk(KERN_INFO KBUILD_MODNAME ": protocols (eg. bitbang) over " 766 "USS720 usb to parallel cables\n"); 767 printk(KERN_INFO KBUILD_MODNAME ": If you just want to connect to a " 768 "printer, use usblp instead\n"); 769out: 770 return retval; 771} 772 773static void __exit uss720_cleanup(void) 774{ 775 usb_deregister(&uss720_driver); 776} 777 778module_init(uss720_init); 779module_exit(uss720_cleanup); 780 781/* --------------------------------------------------------------------- */ 782