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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
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];
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 0
125 dbg("async_complete regs %02x %02x %02x %02x %02x %02x %02x",
126 (unsigned int)priv->reg[0], (unsigned int)priv->reg[1], (unsigned int)priv->reg[2],
127 (unsigned int)priv->reg[3], (unsigned int)priv->reg[4], (unsigned int)priv->reg[5],
128 (unsigned int)priv->reg[6]);
129#endif
130
131 if (rq->reg[2] & rq->reg[1] & 0x10 && pp)
132 parport_generic_irq(pp);
133 }
134 complete(&rq->compl);
135 kref_put(&rq->ref_count, destroy_async);
136}
137
138static struct uss720_async_request *submit_async_request(struct parport_uss720_private *priv,
139 __u8 request, __u8 requesttype, __u16 value, __u16 index,
140 gfp_t mem_flags)
141{
142 struct usb_device *usbdev;
143 struct uss720_async_request *rq;
144 unsigned long flags;
145 int ret;
146
147 if (!priv)
148 return NULL;
149 usbdev = priv->usbdev;
150 if (!usbdev)
151 return NULL;
152 rq = kmalloc(sizeof(struct uss720_async_request), mem_flags);
153 if (!rq) {
154 err("submit_async_request out of memory");
155 return NULL;
156 }
157 kref_init(&rq->ref_count);
158 INIT_LIST_HEAD(&rq->asynclist);
159 init_completion(&rq->compl);
160 kref_get(&priv->ref_count);
161 rq->priv = priv;
162 rq->urb = usb_alloc_urb(0, mem_flags);
163 if (!rq->urb) {
164 kref_put(&rq->ref_count, destroy_async);
165 err("submit_async_request out of memory");
166 return NULL;
167 }
168 rq->dr.bRequestType = requesttype;
169 rq->dr.bRequest = request;
170 rq->dr.wValue = cpu_to_le16(value);
171 rq->dr.wIndex = cpu_to_le16(index);
172 rq->dr.wLength = cpu_to_le16((request == 3) ? sizeof(rq->reg) : 0);
173 usb_fill_control_urb(rq->urb, usbdev, (requesttype & 0x80) ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0),
174 (unsigned char *)&rq->dr,
175 (request == 3) ? rq->reg : NULL, (request == 3) ? sizeof(rq->reg) : 0, async_complete, rq);
176
177 spin_lock_irqsave(&priv->asynclock, flags);
178 list_add_tail(&rq->asynclist, &priv->asynclist);
179 spin_unlock_irqrestore(&priv->asynclock, flags);
180 ret = usb_submit_urb(rq->urb, mem_flags);
181 if (!ret) {
182 kref_get(&rq->ref_count);
183 return rq;
184 }
185 kref_put(&rq->ref_count, destroy_async);
186 err("submit_async_request submit_urb failed with %d", ret);
187 return NULL;
188}
189
190static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv)
191{
192 struct uss720_async_request *rq;
193 unsigned long flags;
194 unsigned int ret = 0;
195
196 spin_lock_irqsave(&priv->asynclock, flags);
197 list_for_each_entry(rq, &priv->asynclist, asynclist) {
198 usb_unlink_urb(rq->urb);
199 ret++;
200 }
201 spin_unlock_irqrestore(&priv->asynclock, flags);
202 return ret;
203}
204
205
206
207static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags)
208{
209 struct parport_uss720_private *priv;
210 struct uss720_async_request *rq;
211 static const unsigned char regindex[9] = {
212 4, 0, 1, 5, 5, 0, 2, 3, 6
213 };
214 int ret;
215
216 if (!pp)
217 return -EIO;
218 priv = pp->private_data;
219 rq = submit_async_request(priv, 3, 0xc0, ((unsigned int)reg) << 8, 0, mem_flags);
220 if (!rq) {
221 err("get_1284_register(%u) failed", (unsigned int)reg);
222 return -EIO;
223 }
224 if (!val) {
225 kref_put(&rq->ref_count, destroy_async);
226 return 0;
227 }
228 if (wait_for_completion_timeout(&rq->compl, HZ)) {
229 ret = rq->urb->status;
230 *val = priv->reg[(reg >= 9) ? 0 : regindex[reg]];
231 if (ret)
232 printk(KERN_WARNING "get_1284_register: "
233 "usb error %d\n", ret);
234 kref_put(&rq->ref_count, destroy_async);
235 return ret;
236 }
237 printk(KERN_WARNING "get_1284_register timeout\n");
238 kill_all_async_requests_priv(priv);
239 return -EIO;
240}
241
242static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags)
243{
244 struct parport_uss720_private *priv;
245 struct uss720_async_request *rq;
246
247 if (!pp)
248 return -EIO;
249 priv = pp->private_data;
250 rq = submit_async_request(priv, 4, 0x40, (((unsigned int)reg) << 8) | val, 0, mem_flags);
251 if (!rq) {
252 err("set_1284_register(%u,%u) failed", (unsigned int)reg, (unsigned int)val);
253 return -EIO;
254 }
255 kref_put(&rq->ref_count, destroy_async);
256 return 0;
257}
258
259
260
261
262#define ECR_SPP 00
263#define ECR_PS2 01
264#define ECR_PPF 02
265#define ECR_ECP 03
266#define ECR_EPP 04
267
268
269static int change_mode(struct parport *pp, int m)
270{
271 struct parport_uss720_private *priv = pp->private_data;
272 int mode;
273 __u8 reg;
274
275 if (get_1284_register(pp, 6, ®, GFP_KERNEL))
276 return -EIO;
277
278 mode = (priv->reg[2] >> 5) & 0x7;
279 if (mode == m)
280 return 0;
281
282 if (mode > ECR_PS2 && m > ECR_PS2)
283 if (change_mode(pp, ECR_PS2))
284 return -EIO;
285
286 if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) {
287
288
289 unsigned long expire = jiffies + pp->physport->cad->timeout;
290 switch (mode) {
291 case ECR_PPF:
292 case ECR_ECP:
293
294 for (;;) {
295 if (get_1284_register(pp, 6, ®, GFP_KERNEL))
296 return -EIO;
297 if (priv->reg[2] & 0x01)
298 break;
299 if (time_after_eq (jiffies, expire))
300
301 return -EBUSY;
302 msleep_interruptible(10);
303 if (signal_pending (current))
304 break;
305 }
306 }
307 }
308
309 if (set_1284_register(pp, 6, m << 5, GFP_KERNEL))
310 return -EIO;
311 if (get_1284_register(pp, 6, ®, GFP_KERNEL))
312 return -EIO;
313 return 0;
314}
315
316
317
318
319static int clear_epp_timeout(struct parport *pp)
320{
321 unsigned char stat;
322
323 if (get_1284_register(pp, 1, &stat, GFP_KERNEL))
324 return 1;
325 return stat & 1;
326}
327
328
329
330
331#if 0
332static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id)
333{
334 struct parport *pp = (struct parport *)dev_id;
335 struct parport_uss720_private *priv = pp->private_data;
336
337 if (usbstatus != 0 || len < 4 || !buffer)
338 return 1;
339 memcpy(priv->reg, buffer, 4);
340
341 if (priv->reg[2] & priv->reg[1] & 0x10)
342 parport_generic_irq(pp);
343 return 1;
344}
345#endif
346
347static void parport_uss720_write_data(struct parport *pp, unsigned char d)
348{
349 set_1284_register(pp, 0, d, GFP_KERNEL);
350}
351
352static unsigned char parport_uss720_read_data(struct parport *pp)
353{
354 unsigned char ret;
355
356 if (get_1284_register(pp, 0, &ret, GFP_KERNEL))
357 return 0;
358 return ret;
359}
360
361static void parport_uss720_write_control(struct parport *pp, unsigned char d)
362{
363 struct parport_uss720_private *priv = pp->private_data;
364
365 d = (d & 0xf) | (priv->reg[1] & 0xf0);
366 if (set_1284_register(pp, 2, d, GFP_KERNEL))
367 return;
368 priv->reg[1] = d;
369}
370
371static unsigned char parport_uss720_read_control(struct parport *pp)
372{
373 struct parport_uss720_private *priv = pp->private_data;
374 return priv->reg[1] & 0xf;
375}
376
377static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val)
378{
379 struct parport_uss720_private *priv = pp->private_data;
380 unsigned char d;
381
382 mask &= 0x0f;
383 val &= 0x0f;
384 d = (priv->reg[1] & (~mask)) ^ val;
385 if (set_1284_register(pp, 2, d, GFP_KERNEL))
386 return 0;
387 priv->reg[1] = d;
388 return d & 0xf;
389}
390
391static unsigned char parport_uss720_read_status(struct parport *pp)
392{
393 unsigned char ret;
394
395 if (get_1284_register(pp, 1, &ret, GFP_KERNEL))
396 return 0;
397 return ret & 0xf8;
398}
399
400static void parport_uss720_disable_irq(struct parport *pp)
401{
402 struct parport_uss720_private *priv = pp->private_data;
403 unsigned char d;
404
405 d = priv->reg[1] & ~0x10;
406 if (set_1284_register(pp, 2, d, GFP_KERNEL))
407 return;
408 priv->reg[1] = d;
409}
410
411static void parport_uss720_enable_irq(struct parport *pp)
412{
413 struct parport_uss720_private *priv = pp->private_data;
414 unsigned char d;
415
416 d = priv->reg[1] | 0x10;
417 if (set_1284_register(pp, 2, d, GFP_KERNEL))
418 return;
419 priv->reg[1] = d;
420}
421
422static void parport_uss720_data_forward (struct parport *pp)
423{
424 struct parport_uss720_private *priv = pp->private_data;
425 unsigned char d;
426
427 d = priv->reg[1] & ~0x20;
428 if (set_1284_register(pp, 2, d, GFP_KERNEL))
429 return;
430 priv->reg[1] = d;
431}
432
433static void parport_uss720_data_reverse (struct parport *pp)
434{
435 struct parport_uss720_private *priv = pp->private_data;
436 unsigned char d;
437
438 d = priv->reg[1] | 0x20;
439 if (set_1284_register(pp, 2, d, GFP_KERNEL))
440 return;
441 priv->reg[1] = d;
442}
443
444static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s)
445{
446 s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0);
447 s->u.pc.ecr = 0x24;
448}
449
450static void parport_uss720_save_state(struct parport *pp, struct parport_state *s)
451{
452 struct parport_uss720_private *priv = pp->private_data;
453
454#if 0
455 if (get_1284_register(pp, 2, NULL, GFP_ATOMIC))
456 return;
457#endif
458 s->u.pc.ctr = priv->reg[1];
459 s->u.pc.ecr = priv->reg[2];
460}
461
462static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s)
463{
464 struct parport_uss720_private *priv = pp->private_data;
465
466 set_1284_register(pp, 2, s->u.pc.ctr, GFP_ATOMIC);
467 set_1284_register(pp, 6, s->u.pc.ecr, GFP_ATOMIC);
468 get_1284_register(pp, 2, NULL, GFP_ATOMIC);
469 priv->reg[1] = s->u.pc.ctr;
470 priv->reg[2] = s->u.pc.ecr;
471}
472
473static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags)
474{
475 struct parport_uss720_private *priv = pp->private_data;
476 size_t got = 0;
477
478 if (change_mode(pp, ECR_EPP))
479 return 0;
480 for (; got < length; got++) {
481 if (get_1284_register(pp, 4, (char *)buf, GFP_KERNEL))
482 break;
483 buf++;
484 if (priv->reg[0] & 0x01) {
485 clear_epp_timeout(pp);
486 break;
487 }
488 }
489 change_mode(pp, ECR_PS2);
490 return got;
491}
492
493static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags)
494{
495#if 0
496 struct parport_uss720_private *priv = pp->private_data;
497 size_t written = 0;
498
499 if (change_mode(pp, ECR_EPP))
500 return 0;
501 for (; written < length; written++) {
502 if (set_1284_register(pp, 4, (char *)buf, GFP_KERNEL))
503 break;
504 ((char*)buf)++;
505 if (get_1284_register(pp, 1, NULL, GFP_KERNEL))
506 break;
507 if (priv->reg[0] & 0x01) {
508 clear_epp_timeout(pp);
509 break;
510 }
511 }
512 change_mode(pp, ECR_PS2);
513 return written;
514#else
515 struct parport_uss720_private *priv = pp->private_data;
516 struct usb_device *usbdev = priv->usbdev;
517 int rlen;
518 int i;
519
520 if (!usbdev)
521 return 0;
522 if (change_mode(pp, ECR_EPP))
523 return 0;
524 i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000);
525 if (i)
526 printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buf, length, rlen);
527 change_mode(pp, ECR_PS2);
528 return rlen;
529#endif
530}
531
532static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags)
533{
534 struct parport_uss720_private *priv = pp->private_data;
535 size_t got = 0;
536
537 if (change_mode(pp, ECR_EPP))
538 return 0;
539 for (; got < length; got++) {
540 if (get_1284_register(pp, 3, (char *)buf, GFP_KERNEL))
541 break;
542 buf++;
543 if (priv->reg[0] & 0x01) {
544 clear_epp_timeout(pp);
545 break;
546 }
547 }
548 change_mode(pp, ECR_PS2);
549 return got;
550}
551
552static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags)
553{
554 struct parport_uss720_private *priv = pp->private_data;
555 size_t written = 0;
556
557 if (change_mode(pp, ECR_EPP))
558 return 0;
559 for (; written < length; written++) {
560 if (set_1284_register(pp, 3, *(char *)buf, GFP_KERNEL))
561 break;
562 buf++;
563 if (get_1284_register(pp, 1, NULL, GFP_KERNEL))
564 break;
565 if (priv->reg[0] & 0x01) {
566 clear_epp_timeout(pp);
567 break;
568 }
569 }
570 change_mode(pp, ECR_PS2);
571 return written;
572}
573
574static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags)
575{
576 struct parport_uss720_private *priv = pp->private_data;
577 struct usb_device *usbdev = priv->usbdev;
578 int rlen;
579 int i;
580
581 if (!usbdev)
582 return 0;
583 if (change_mode(pp, ECR_ECP))
584 return 0;
585 i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000);
586 if (i)
587 printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen);
588 change_mode(pp, ECR_PS2);
589 return rlen;
590}
591
592static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags)
593{
594 struct parport_uss720_private *priv = pp->private_data;
595 struct usb_device *usbdev = priv->usbdev;
596 int rlen;
597 int i;
598
599 if (!usbdev)
600 return 0;
601 if (change_mode(pp, ECR_ECP))
602 return 0;
603 i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000);
604 if (i)
605 printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %Zu rlen %u\n", buffer, len, rlen);
606 change_mode(pp, ECR_PS2);
607 return rlen;
608}
609
610static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags)
611{
612 size_t written = 0;
613
614 if (change_mode(pp, ECR_ECP))
615 return 0;
616 for (; written < len; written++) {
617 if (set_1284_register(pp, 5, *(char *)buffer, GFP_KERNEL))
618 break;
619 buffer++;
620 }
621 change_mode(pp, ECR_PS2);
622 return written;
623}
624
625static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags)
626{
627 struct parport_uss720_private *priv = pp->private_data;
628 struct usb_device *usbdev = priv->usbdev;
629 int rlen;
630 int i;
631
632 if (!usbdev)
633 return 0;
634 if (change_mode(pp, ECR_PPF))
635 return 0;
636 i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000);
637 if (i)
638 printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen);
639 change_mode(pp, ECR_PS2);
640 return rlen;
641}
642
643
644
645static struct parport_operations parport_uss720_ops =
646{
647 .owner = THIS_MODULE,
648 .write_data = parport_uss720_write_data,
649 .read_data = parport_uss720_read_data,
650
651 .write_control = parport_uss720_write_control,
652 .read_control = parport_uss720_read_control,
653 .frob_control = parport_uss720_frob_control,
654
655 .read_status = parport_uss720_read_status,
656
657 .enable_irq = parport_uss720_enable_irq,
658 .disable_irq = parport_uss720_disable_irq,
659
660 .data_forward = parport_uss720_data_forward,
661 .data_reverse = parport_uss720_data_reverse,
662
663 .init_state = parport_uss720_init_state,
664 .save_state = parport_uss720_save_state,
665 .restore_state = parport_uss720_restore_state,
666
667 .epp_write_data = parport_uss720_epp_write_data,
668 .epp_read_data = parport_uss720_epp_read_data,
669 .epp_write_addr = parport_uss720_epp_write_addr,
670 .epp_read_addr = parport_uss720_epp_read_addr,
671
672 .ecp_write_data = parport_uss720_ecp_write_data,
673 .ecp_read_data = parport_uss720_ecp_read_data,
674 .ecp_write_addr = parport_uss720_ecp_write_addr,
675
676 .compat_write_data = parport_uss720_write_compat,
677 .nibble_read_data = parport_ieee1284_read_nibble,
678 .byte_read_data = parport_ieee1284_read_byte,
679};
680
681
682
683static int uss720_probe(struct usb_interface *intf,
684 const struct usb_device_id *id)
685{
686 struct usb_device *usbdev = usb_get_dev(interface_to_usbdev(intf));
687 struct usb_host_interface *interface;
688 struct usb_host_endpoint *endpoint;
689 struct parport_uss720_private *priv;
690 struct parport *pp;
691 unsigned char reg;
692 int i;
693
694 dbg("probe: vendor id 0x%x, device id 0x%x\n",
695 le16_to_cpu(usbdev->descriptor.idVendor),
696 le16_to_cpu(usbdev->descriptor.idProduct));
697
698
699 if (intf->num_altsetting != 3) {
700 usb_put_dev(usbdev);
701 return -ENODEV;
702 }
703 i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2);
704 dbg("set inteface result %d", i);
705
706 interface = intf->cur_altsetting;
707
708
709
710
711 if (!(priv = kzalloc(sizeof(struct parport_uss720_private), GFP_KERNEL))) {
712 usb_put_dev(usbdev);
713 return -ENOMEM;
714 }
715 priv->pp = NULL;
716 priv->usbdev = usbdev;
717 kref_init(&priv->ref_count);
718 spin_lock_init(&priv->asynclock);
719 INIT_LIST_HEAD(&priv->asynclist);
720 if (!(pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops))) {
721 printk(KERN_WARNING "uss720: could not register parport\n");
722 goto probe_abort;
723 }
724
725 priv->pp = pp;
726 pp->private_data = priv;
727 pp->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP | PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
728
729
730 set_1284_register(pp, 7, 0x00, GFP_KERNEL);
731 set_1284_register(pp, 6, 0x30, GFP_KERNEL);
732 set_1284_register(pp, 2, 0x0c, GFP_KERNEL);
733
734 get_1284_register(pp, 0, ®, GFP_KERNEL);
735 dbg("reg: %02x %02x %02x %02x %02x %02x %02x",
736 priv->reg[0], priv->reg[1], priv->reg[2], priv->reg[3], priv->reg[4], priv->reg[5], priv->reg[6]);
737
738 endpoint = &interface->endpoint[2];
739 dbg("epaddr %d interval %d", endpoint->desc.bEndpointAddress, endpoint->desc.bInterval);
740 parport_announce_port(pp);
741
742 usb_set_intfdata(intf, pp);
743 return 0;
744
745probe_abort:
746 kill_all_async_requests_priv(priv);
747 kref_put(&priv->ref_count, destroy_priv);
748 return -ENODEV;
749}
750
751static void uss720_disconnect(struct usb_interface *intf)
752{
753 struct parport *pp = usb_get_intfdata(intf);
754 struct parport_uss720_private *priv;
755 struct usb_device *usbdev;
756
757 dbg("disconnect");
758 usb_set_intfdata(intf, NULL);
759 if (pp) {
760 priv = pp->private_data;
761 usbdev = priv->usbdev;
762 priv->usbdev = NULL;
763 priv->pp = NULL;
764 dbg("parport_remove_port");
765 parport_remove_port(pp);
766 parport_put_port(pp);
767 kill_all_async_requests_priv(priv);
768 kref_put(&priv->ref_count, destroy_priv);
769 }
770 dbg("disconnect done");
771}
772
773
774static const struct usb_device_id uss720_table[] = {
775 { USB_DEVICE(0x047e, 0x1001) },
776 { USB_DEVICE(0x0557, 0x2001) },
777 { USB_DEVICE(0x0729, 0x1284) },
778 { USB_DEVICE(0x1293, 0x0002) },
779 { USB_DEVICE(0x050d, 0x0002) },
780 { }
781};
782
783MODULE_DEVICE_TABLE (usb, uss720_table);
784
785
786static struct usb_driver uss720_driver = {
787 .name = "uss720",
788 .probe = uss720_probe,
789 .disconnect = uss720_disconnect,
790 .id_table = uss720_table,
791};
792
793
794
795MODULE_AUTHOR(DRIVER_AUTHOR);
796MODULE_DESCRIPTION(DRIVER_DESC);
797MODULE_LICENSE("GPL");
798
799static int __init uss720_init(void)
800{
801 int retval;
802 retval = usb_register(&uss720_driver);
803 if (retval)
804 goto out;
805
806 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
807 DRIVER_DESC "\n");
808 printk(KERN_INFO KBUILD_MODNAME ": NOTE: this is a special purpose "
809 "driver to allow nonstandard\n");
810 printk(KERN_INFO KBUILD_MODNAME ": protocols (eg. bitbang) over "
811 "USS720 usb to parallel cables\n");
812 printk(KERN_INFO KBUILD_MODNAME ": If you just want to connect to a "
813 "printer, use usblp instead\n");
814out:
815 return retval;
816}
817
818static void __exit uss720_cleanup(void)
819{
820 usb_deregister(&uss720_driver);
821}
822
823module_init(uss720_init);
824module_exit(uss720_cleanup);
825
826
827
