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Merge remote-tracking branch 'usb/usb-next'
[deliverable/linux.git] / drivers / usb / misc / uss720.c
CommitLineData
1da177e4
LT		 1/*****************************************************************************/
2
3/*
4 * uss720.c -- USS720 USB Parport Cable.
5 *
ecc1624a 6 * Copyright (C) 1999, 2005, 2010
0f36163d 7 * Thomas Sailer (t.sailer@alumni.ethz.ch)
1da177e4
LT		 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:
0f36163d
TS		 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
1da177e4
LT		 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>
0f36163d
TS		 50#include <linux/completion.h>
51#include <linux/kref.h>
5a0e3ad6 52#include <linux/slab.h>
1da177e4
LT		 53
54/*
55 * Version Information
56 */
0f36163d
TS		 57#define DRIVER_VERSION "v0.6"
58#define DRIVER_AUTHOR "Thomas M. Sailer, t.sailer@alumni.ethz.ch"
1da177e4
LT		 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;
0f36163d
TS		 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;
9821aa9d 78 struct usb_ctrlrequest *dr;
0f36163d 79 __u8 reg[7];
1da177e4
LT		 80};
81
82/* --------------------------------------------------------------------- */
83
0f36163d 84static void destroy_priv(struct kref *kref)
1da177e4 85{
0f36163d 86 struct parport_uss720_private *priv = container_of(kref, struct parport_uss720_private, ref_count);
1da177e4 87
7a2d2810 88 dev_dbg(&priv->usbdev->dev, "destroying priv datastructure\n");
0f36163d
TS		 89 usb_put_dev(priv->usbdev);
90 kfree(priv);
0f36163d
TS		 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);
9821aa9d 101 kfree(rq->dr);
0f36163d
TS		 102 spin_lock_irqsave(&priv->asynclock, flags);
103 list_del_init(&rq->asynclist);
104 spin_unlock_irqrestore(&priv->asynclock, flags);
105 kfree(rq);
106 kref_put(&priv->ref_count, destroy_priv);
107}
108
109/* --------------------------------------------------------------------- */
110
7d12e780 111static void async_complete(struct urb *urb)
0f36163d
TS		 112{
113 struct uss720_async_request *rq;
114 struct parport *pp;
115 struct parport_uss720_private *priv;
82210d37 116 int status = urb->status;
0f36163d
TS		 117
118 rq = urb->context;
119 priv = rq->priv;
120 pp = priv->pp;
82210d37 121 if (status) {
d2b1ff71
GKH		 122 dev_err(&urb->dev->dev, "async_complete: urb error %d\n",
123 status);
9821aa9d 124 } else if (rq->dr->bRequest == 3) {
0f36163d 125 memcpy(priv->reg, rq->reg, sizeof(priv->reg));
1da177e4 126#if 0
5d31a6dc
AS		 127 dev_dbg(&priv->usbdev->dev, "async_complete regs %7ph\n",
128 priv->reg);
1da177e4
LT		 129#endif
130 /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
0f36163d 131 if (rq->reg[2] & rq->reg[1] & 0x10 && pp)
f230d101 132 parport_generic_irq(pp);
1da177e4 133 }
0f36163d
TS		 134 complete(&rq->compl);
135 kref_put(&rq->ref_count, destroy_async);
1da177e4
LT		 136}
137
0f36163d
TS		 138static struct uss720_async_request *submit_async_request(struct parport_uss720_private *priv,
139 __u8 request, __u8 requesttype, __u16 value, __u16 index,
55016f10 140 gfp_t mem_flags)
1da177e4 141{
0f36163d
TS		 142 struct usb_device *usbdev;
143 struct uss720_async_request *rq;
144 unsigned long flags;
1da177e4
LT		 145 int ret;
146
0f36163d
TS		 147 if (!priv)
148 return NULL;
149 usbdev = priv->usbdev;
1da177e4 150 if (!usbdev)
0f36163d 151 return NULL;
9821aa9d 152 rq = kzalloc(sizeof(struct uss720_async_request), mem_flags);
c9220ba5 153 if (!rq)
0f36163d 154 return NULL;
0f36163d
TS		 155 kref_init(&rq->ref_count);
156 INIT_LIST_HEAD(&rq->asynclist);
157 init_completion(&rq->compl);
158 kref_get(&priv->ref_count);
159 rq->priv = priv;
160 rq->urb = usb_alloc_urb(0, mem_flags);
161 if (!rq->urb) {
162 kref_put(&rq->ref_count, destroy_async);
0f36163d
TS		 163 return NULL;
164 }
9821aa9d
JH		 165 rq->dr = kmalloc(sizeof(*rq->dr), mem_flags);
166 if (!rq->dr) {
167 kref_put(&rq->ref_count, destroy_async);
168 return NULL;
169 }
170 rq->dr->bRequestType = requesttype;
171 rq->dr->bRequest = request;
172 rq->dr->wValue = cpu_to_le16(value);
173 rq->dr->wIndex = cpu_to_le16(index);
174 rq->dr->wLength = cpu_to_le16((request == 3) ? sizeof(rq->reg) : 0);
0f36163d 175 usb_fill_control_urb(rq->urb, usbdev, (requesttype & 0x80) ? usb_rcvctrlpipe(usbdev, 0) : usb_sndctrlpipe(usbdev, 0),
9821aa9d 176 (unsigned char *)rq->dr,
0f36163d
TS		 177 (request == 3) ? rq->reg : NULL, (request == 3) ? sizeof(rq->reg) : 0, async_complete, rq);
178 /* rq->urb->transfer_flags |= URB_ASYNC_UNLINK; */
179 spin_lock_irqsave(&priv->asynclock, flags);
180 list_add_tail(&rq->asynclist, &priv->asynclist);
181 spin_unlock_irqrestore(&priv->asynclock, flags);
adaa3c63 182 kref_get(&rq->ref_count);
0f36163d 183 ret = usb_submit_urb(rq->urb, mem_flags);
adaa3c63 184 if (!ret)
0f36163d 185 return rq;
adaa3c63 186 destroy_async(&rq->ref_count);
d2b1ff71 187 dev_err(&usbdev->dev, "submit_async_request submit_urb failed with %d\n", ret);
0f36163d
TS		 188 return NULL;
189}
190
191static unsigned int kill_all_async_requests_priv(struct parport_uss720_private *priv)
192{
193 struct uss720_async_request *rq;
194 unsigned long flags;
195 unsigned int ret = 0;
196
197 spin_lock_irqsave(&priv->asynclock, flags);
198 list_for_each_entry(rq, &priv->asynclist, asynclist) {
199 usb_unlink_urb(rq->urb);
200 ret++;
201 }
202 spin_unlock_irqrestore(&priv->asynclock, flags);
1da177e4
LT		 203 return ret;
204}
205
206/* --------------------------------------------------------------------- */
207
55016f10 208static int get_1284_register(struct parport *pp, unsigned char reg, unsigned char *val, gfp_t mem_flags)
0f36163d
TS		 209{
210 struct parport_uss720_private *priv;
211 struct uss720_async_request *rq;
212 static const unsigned char regindex[9] = {
213 4, 0, 1, 5, 5, 0, 2, 3, 6
214 };
215 int ret;
216
217 if (!pp)
218 return -EIO;
219 priv = pp->private_data;
220 rq = submit_async_request(priv, 3, 0xc0, ((unsigned int)reg) << 8, 0, mem_flags);
221 if (!rq) {
d2b1ff71
GKH		 222 dev_err(&priv->usbdev->dev, "get_1284_register(%u) failed",
223 (unsigned int)reg);
0f36163d
TS		 224 return -EIO;
225 }
226 if (!val) {
227 kref_put(&rq->ref_count, destroy_async);
228 return 0;
229 }
230 if (wait_for_completion_timeout(&rq->compl, HZ)) {
231 ret = rq->urb->status;
232 *val = priv->reg[(reg >= 9) ? 0 : regindex[reg]];
233 if (ret)
3b6004f3
GKH		 234 printk(KERN_WARNING "get_1284_register: "
235 "usb error %d\n", ret);
0f36163d
TS		 236 kref_put(&rq->ref_count, destroy_async);
237 return ret;
238 }
3b6004f3 239 printk(KERN_WARNING "get_1284_register timeout\n");
0f36163d
TS		 240 kill_all_async_requests_priv(priv);
241 return -EIO;
242}
243
55016f10 244static int set_1284_register(struct parport *pp, unsigned char reg, unsigned char val, gfp_t mem_flags)
0f36163d
TS		 245{
246 struct parport_uss720_private *priv;
247 struct uss720_async_request *rq;
248
249 if (!pp)
250 return -EIO;
251 priv = pp->private_data;
252 rq = submit_async_request(priv, 4, 0x40, (((unsigned int)reg) << 8) | val, 0, mem_flags);
253 if (!rq) {
d2b1ff71
GKH		 254 dev_err(&priv->usbdev->dev, "set_1284_register(%u,%u) failed",
255 (unsigned int)reg, (unsigned int)val);
0f36163d
TS		 256 return -EIO;
257 }
258 kref_put(&rq->ref_count, destroy_async);
259 return 0;
260}
261
262/* --------------------------------------------------------------------- */
263
1da177e4
LT		 264/* ECR modes */
265#define ECR_SPP 00
266#define ECR_PS2 01
267#define ECR_PPF 02
268#define ECR_ECP 03
269#define ECR_EPP 04
270
271/* Safely change the mode bits in the ECR */
272static int change_mode(struct parport *pp, int m)
273{
274 struct parport_uss720_private *priv = pp->private_data;
275 int mode;
0f36163d 276 __u8 reg;
1da177e4 277
0f36163d 278 if (get_1284_register(pp, 6, &reg, GFP_KERNEL))
1da177e4
LT		 279 return -EIO;
280 /* Bits <7:5> contain the mode. */
281 mode = (priv->reg[2] >> 5) & 0x7;
282 if (mode == m)
283 return 0;
284 /* We have to go through mode 000 or 001 */
285 if (mode > ECR_PS2 && m > ECR_PS2)
286 if (change_mode(pp, ECR_PS2))
287 return -EIO;
288
289 if (m <= ECR_PS2 && !(priv->reg[1] & 0x20)) {
290 /* This mode resets the FIFO, so we may
291 * have to wait for it to drain first. */
292 unsigned long expire = jiffies + pp->physport->cad->timeout;
293 switch (mode) {
294 case ECR_PPF: /* Parallel Port FIFO mode */
295 case ECR_ECP: /* ECP Parallel Port mode */
296 /* Poll slowly. */
297 for (;;) {
0f36163d 298 if (get_1284_register(pp, 6, &reg, GFP_KERNEL))
1da177e4
LT		 299 return -EIO;
300 if (priv->reg[2] & 0x01)
301 break;
302 if (time_after_eq (jiffies, expire))
303 /* The FIFO is stuck. */
304 return -EBUSY;
305 msleep_interruptible(10);
306 if (signal_pending (current))
307 break;
308 }
309 }
310 }
311 /* Set the mode. */
0f36163d
TS		 312 if (set_1284_register(pp, 6, m << 5, GFP_KERNEL))
313 return -EIO;
314 if (get_1284_register(pp, 6, &reg, GFP_KERNEL))
1da177e4
LT		 315 return -EIO;
316 return 0;
317}
318
319/*
320 * Clear TIMEOUT BIT in EPP MODE
321 */
322static int clear_epp_timeout(struct parport *pp)
323{
324 unsigned char stat;
325
0f36163d 326 if (get_1284_register(pp, 1, &stat, GFP_KERNEL))
1da177e4
LT		 327 return 1;
328 return stat & 1;
329}
330
331/*
332 * Access functions.
333 */
334#if 0
335static int uss720_irq(int usbstatus, void *buffer, int len, void *dev_id)
336{
337 struct parport *pp = (struct parport *)dev_id;
338 struct parport_uss720_private *priv = pp->private_data;
339
340 if (usbstatus != 0 || len < 4 || !buffer)
341 return 1;
342 memcpy(priv->reg, buffer, 4);
343 /* if nAck interrupts are enabled and we have an interrupt, call the interrupt procedure */
344 if (priv->reg[2] & priv->reg[1] & 0x10)
f230d101 345 parport_generic_irq(pp);
1da177e4
LT		 346 return 1;
347}
348#endif
349
350static void parport_uss720_write_data(struct parport *pp, unsigned char d)
351{
0f36163d 352 set_1284_register(pp, 0, d, GFP_KERNEL);
1da177e4
LT		 353}
354
355static unsigned char parport_uss720_read_data(struct parport *pp)
356{
357 unsigned char ret;
358
0f36163d 359 if (get_1284_register(pp, 0, &ret, GFP_KERNEL))
1da177e4
LT		 360 return 0;
361 return ret;
362}
363
364static void parport_uss720_write_control(struct parport *pp, unsigned char d)
365{
366 struct parport_uss720_private *priv = pp->private_data;
367
368 d = (d & 0xf) | (priv->reg[1] & 0xf0);
0f36163d 369 if (set_1284_register(pp, 2, d, GFP_KERNEL))
1da177e4
LT		 370 return;
371 priv->reg[1] = d;
372}
373
374static unsigned char parport_uss720_read_control(struct parport *pp)
375{
376 struct parport_uss720_private *priv = pp->private_data;
377 return priv->reg[1] & 0xf; /* Use soft copy */
378}
379
380static unsigned char parport_uss720_frob_control(struct parport *pp, unsigned char mask, unsigned char val)
381{
382 struct parport_uss720_private *priv = pp->private_data;
383 unsigned char d;
384
385 mask &= 0x0f;
386 val &= 0x0f;
387 d = (priv->reg[1] & (~mask)) ^ val;
0f36163d 388 if (set_1284_register(pp, 2, d, GFP_KERNEL))
1da177e4
LT		 389 return 0;
390 priv->reg[1] = d;
391 return d & 0xf;
392}
393
394static unsigned char parport_uss720_read_status(struct parport *pp)
395{
396 unsigned char ret;
397
0f36163d 398 if (get_1284_register(pp, 1, &ret, GFP_KERNEL))
1da177e4
LT		 399 return 0;
400 return ret & 0xf8;
401}
402
403static void parport_uss720_disable_irq(struct parport *pp)
404{
405 struct parport_uss720_private *priv = pp->private_data;
406 unsigned char d;
407
408 d = priv->reg[1] & ~0x10;
0f36163d 409 if (set_1284_register(pp, 2, d, GFP_KERNEL))
1da177e4
LT		 410 return;
411 priv->reg[1] = d;
412}
413
414static void parport_uss720_enable_irq(struct parport *pp)
415{
416 struct parport_uss720_private *priv = pp->private_data;
417 unsigned char d;
418
419 d = priv->reg[1] | 0x10;
0f36163d 420 if (set_1284_register(pp, 2, d, GFP_KERNEL))
1da177e4
LT		 421 return;
422 priv->reg[1] = d;
423}
424
425static void parport_uss720_data_forward (struct parport *pp)
426{
427 struct parport_uss720_private *priv = pp->private_data;
428 unsigned char d;
429
430 d = priv->reg[1] & ~0x20;
0f36163d 431 if (set_1284_register(pp, 2, d, GFP_KERNEL))
1da177e4
LT		 432 return;
433 priv->reg[1] = d;
434}
435
436static void parport_uss720_data_reverse (struct parport *pp)
437{
438 struct parport_uss720_private *priv = pp->private_data;
439 unsigned char d;
440
441 d = priv->reg[1] | 0x20;
0f36163d 442 if (set_1284_register(pp, 2, d, GFP_KERNEL))
1da177e4
LT		 443 return;
444 priv->reg[1] = d;
445}
446
447static void parport_uss720_init_state(struct pardevice *dev, struct parport_state *s)
448{
449 s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0);
450 s->u.pc.ecr = 0x24;
451}
452
453static void parport_uss720_save_state(struct parport *pp, struct parport_state *s)
454{
455 struct parport_uss720_private *priv = pp->private_data;
456
0f36163d
TS		 457#if 0
458 if (get_1284_register(pp, 2, NULL, GFP_ATOMIC))
1da177e4 459 return;
0f36163d 460#endif
1da177e4
LT		 461 s->u.pc.ctr = priv->reg[1];
462 s->u.pc.ecr = priv->reg[2];
463}
464
465static void parport_uss720_restore_state(struct parport *pp, struct parport_state *s)
466{
0f36163d
TS		 467 struct parport_uss720_private *priv = pp->private_data;
468
469 set_1284_register(pp, 2, s->u.pc.ctr, GFP_ATOMIC);
470 set_1284_register(pp, 6, s->u.pc.ecr, GFP_ATOMIC);
471 get_1284_register(pp, 2, NULL, GFP_ATOMIC);
472 priv->reg[1] = s->u.pc.ctr;
473 priv->reg[2] = s->u.pc.ecr;
1da177e4
LT		 474}
475
476static size_t parport_uss720_epp_read_data(struct parport *pp, void *buf, size_t length, int flags)
477{
478 struct parport_uss720_private *priv = pp->private_data;
479 size_t got = 0;
480
481 if (change_mode(pp, ECR_EPP))
482 return 0;
483 for (; got < length; got++) {
0f36163d 484 if (get_1284_register(pp, 4, (char *)buf, GFP_KERNEL))
1da177e4
LT		 485 break;
486 buf++;
487 if (priv->reg[0] & 0x01) {
488 clear_epp_timeout(pp);
489 break;
490 }
491 }
492 change_mode(pp, ECR_PS2);
493 return got;
494}
495
496static size_t parport_uss720_epp_write_data(struct parport *pp, const void *buf, size_t length, int flags)
497{
498#if 0
499 struct parport_uss720_private *priv = pp->private_data;
500 size_t written = 0;
501
502 if (change_mode(pp, ECR_EPP))
503 return 0;
504 for (; written < length; written++) {
0f36163d 505 if (set_1284_register(pp, 4, (char *)buf, GFP_KERNEL))
1da177e4
LT		 506 break;
507 ((char*)buf)++;
0f36163d 508 if (get_1284_register(pp, 1, NULL, GFP_KERNEL))
1da177e4
LT		 509 break;
510 if (priv->reg[0] & 0x01) {
511 clear_epp_timeout(pp);
512 break;
513 }
514 }
515 change_mode(pp, ECR_PS2);
516 return written;
517#else
518 struct parport_uss720_private *priv = pp->private_data;
519 struct usb_device *usbdev = priv->usbdev;
520 int rlen;
521 int i;
522
523 if (!usbdev)
524 return 0;
525 if (change_mode(pp, ECR_EPP))
526 return 0;
527 i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buf, length, &rlen, 20000);
528 if (i)
529 printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buf, length, rlen);
530 change_mode(pp, ECR_PS2);
531 return rlen;
532#endif
533}
534
535static size_t parport_uss720_epp_read_addr(struct parport *pp, void *buf, size_t length, int flags)
536{
537 struct parport_uss720_private *priv = pp->private_data;
538 size_t got = 0;
539
540 if (change_mode(pp, ECR_EPP))
541 return 0;
542 for (; got < length; got++) {
0f36163d 543 if (get_1284_register(pp, 3, (char *)buf, GFP_KERNEL))
1da177e4
LT		 544 break;
545 buf++;
546 if (priv->reg[0] & 0x01) {
547 clear_epp_timeout(pp);
548 break;
549 }
550 }
551 change_mode(pp, ECR_PS2);
552 return got;
553}
554
555static size_t parport_uss720_epp_write_addr(struct parport *pp, const void *buf, size_t length, int flags)
556{
557 struct parport_uss720_private *priv = pp->private_data;
558 size_t written = 0;
559
560 if (change_mode(pp, ECR_EPP))
561 return 0;
562 for (; written < length; written++) {
0f36163d 563 if (set_1284_register(pp, 3, *(char *)buf, GFP_KERNEL))
1da177e4
LT		 564 break;
565 buf++;
0f36163d 566 if (get_1284_register(pp, 1, NULL, GFP_KERNEL))
1da177e4
LT		 567 break;
568 if (priv->reg[0] & 0x01) {
569 clear_epp_timeout(pp);
570 break;
571 }
572 }
573 change_mode(pp, ECR_PS2);
574 return written;
575}
576
577static size_t parport_uss720_ecp_write_data(struct parport *pp, const void *buffer, size_t len, int flags)
578{
579 struct parport_uss720_private *priv = pp->private_data;
580 struct usb_device *usbdev = priv->usbdev;
581 int rlen;
582 int i;
583
584 if (!usbdev)
585 return 0;
586 if (change_mode(pp, ECR_ECP))
587 return 0;
588 i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000);
589 if (i)
590 printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen);
591 change_mode(pp, ECR_PS2);
592 return rlen;
593}
594
595static size_t parport_uss720_ecp_read_data(struct parport *pp, void *buffer, size_t len, int flags)
596{
597 struct parport_uss720_private *priv = pp->private_data;
598 struct usb_device *usbdev = priv->usbdev;
599 int rlen;
600 int i;
601
602 if (!usbdev)
603 return 0;
604 if (change_mode(pp, ECR_ECP))
605 return 0;
606 i = usb_bulk_msg(usbdev, usb_rcvbulkpipe(usbdev, 2), buffer, len, &rlen, 20000);
607 if (i)
608 printk(KERN_ERR "uss720: recvbulk ep 2 buf %p len %Zu rlen %u\n", buffer, len, rlen);
609 change_mode(pp, ECR_PS2);
610 return rlen;
611}
612
613static size_t parport_uss720_ecp_write_addr(struct parport *pp, const void *buffer, size_t len, int flags)
614{
615 size_t written = 0;
616
617 if (change_mode(pp, ECR_ECP))
618 return 0;
619 for (; written < len; written++) {
0f36163d 620 if (set_1284_register(pp, 5, *(char *)buffer, GFP_KERNEL))
1da177e4
LT		 621 break;
622 buffer++;
623 }
624 change_mode(pp, ECR_PS2);
625 return written;
626}
627
628static size_t parport_uss720_write_compat(struct parport *pp, const void *buffer, size_t len, int flags)
629{
630 struct parport_uss720_private *priv = pp->private_data;
631 struct usb_device *usbdev = priv->usbdev;
632 int rlen;
633 int i;
634
635 if (!usbdev)
636 return 0;
637 if (change_mode(pp, ECR_PPF))
638 return 0;
639 i = usb_bulk_msg(usbdev, usb_sndbulkpipe(usbdev, 1), (void *)buffer, len, &rlen, 20000);
640 if (i)
641 printk(KERN_ERR "uss720: sendbulk ep 1 buf %p len %Zu rlen %u\n", buffer, len, rlen);
642 change_mode(pp, ECR_PS2);
643 return rlen;
644}
645
646/* --------------------------------------------------------------------- */
647
648static struct parport_operations parport_uss720_ops =
649{
650 .owner = THIS_MODULE,
651 .write_data = parport_uss720_write_data,
652 .read_data = parport_uss720_read_data,
653
654 .write_control = parport_uss720_write_control,
655 .read_control = parport_uss720_read_control,
656 .frob_control = parport_uss720_frob_control,
657
658 .read_status = parport_uss720_read_status,
659
660 .enable_irq = parport_uss720_enable_irq,
661 .disable_irq = parport_uss720_disable_irq,
662
663 .data_forward = parport_uss720_data_forward,
664 .data_reverse = parport_uss720_data_reverse,
665
666 .init_state = parport_uss720_init_state,
667 .save_state = parport_uss720_save_state,
668 .restore_state = parport_uss720_restore_state,
669
670 .epp_write_data = parport_uss720_epp_write_data,
671 .epp_read_data = parport_uss720_epp_read_data,
672 .epp_write_addr = parport_uss720_epp_write_addr,
673 .epp_read_addr = parport_uss720_epp_read_addr,
674
675 .ecp_write_data = parport_uss720_ecp_write_data,
676 .ecp_read_data = parport_uss720_ecp_read_data,
677 .ecp_write_addr = parport_uss720_ecp_write_addr,
678
679 .compat_write_data = parport_uss720_write_compat,
680 .nibble_read_data = parport_ieee1284_read_nibble,
681 .byte_read_data = parport_ieee1284_read_byte,
682};
683
684/* --------------------------------------------------------------------- */
685
686static int uss720_probe(struct usb_interface *intf,
687 const struct usb_device_id *id)
688{
0f36163d 689 struct usb_device *usbdev = usb_get_dev(interface_to_usbdev(intf));
1da177e4
LT		 690 struct usb_host_interface *interface;
691 struct usb_host_endpoint *endpoint;
692 struct parport_uss720_private *priv;
693 struct parport *pp;
0f36163d 694 unsigned char reg;
1da177e4
LT		 695 int i;
696
7a2d2810
GKH		 697 dev_dbg(&intf->dev, "probe: vendor id 0x%x, device id 0x%x\n",
698 le16_to_cpu(usbdev->descriptor.idVendor),
699 le16_to_cpu(usbdev->descriptor.idProduct));
1da177e4
LT		 700
701 /* our known interfaces have 3 alternate settings */
0f36163d
TS		 702 if (intf->num_altsetting != 3) {
703 usb_put_dev(usbdev);
1da177e4 704 return -ENODEV;
0f36163d 705 }
1da177e4 706 i = usb_set_interface(usbdev, intf->altsetting->desc.bInterfaceNumber, 2);
cf2fbdd2 707 dev_dbg(&intf->dev, "set interface result %d\n", i);
1da177e4
LT		 708
709 interface = intf->cur_altsetting;
710
711 /*
712 * Allocate parport interface
713 */
adde04c6
GKH		 714 priv = kzalloc(sizeof(struct parport_uss720_private), GFP_KERNEL);
715 if (!priv) {
0f36163d 716 usb_put_dev(usbdev);
1da177e4 717 return -ENOMEM;
0f36163d
TS		 718 }
719 priv->pp = NULL;
720 priv->usbdev = usbdev;
721 kref_init(&priv->ref_count);
722 spin_lock_init(&priv->asynclock);
723 INIT_LIST_HEAD(&priv->asynclist);
adde04c6
GKH		 724 pp = parport_register_port(0, PARPORT_IRQ_NONE, PARPORT_DMA_NONE, &parport_uss720_ops);
725 if (!pp) {
3b6004f3 726 printk(KERN_WARNING "uss720: could not register parport\n");
1da177e4
LT		 727 goto probe_abort;
728 }
729
0f36163d 730 priv->pp = pp;
1da177e4 731 pp->private_data = priv;
1da177e4
LT		 732 pp->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_TRISTATE | PARPORT_MODE_EPP | PARPORT_MODE_ECP | PARPORT_MODE_COMPAT;
733
734 /* set the USS720 control register to manual mode, no ECP compression, enable all ints */
0f36163d
TS		 735 set_1284_register(pp, 7, 0x00, GFP_KERNEL);
736 set_1284_register(pp, 6, 0x30, GFP_KERNEL); /* PS/2 mode */
737 set_1284_register(pp, 2, 0x0c, GFP_KERNEL);
1da177e4 738 /* debugging */
0f36163d 739 get_1284_register(pp, 0, &reg, GFP_KERNEL);
5d31a6dc 740 dev_dbg(&intf->dev, "reg: %7ph\n", priv->reg);
1da177e4
LT		 741
742 endpoint = &interface->endpoint[2];
7a2d2810
GKH		 743 dev_dbg(&intf->dev, "epaddr %d interval %d\n",
744 endpoint->desc.bEndpointAddress, endpoint->desc.bInterval);
1da177e4
LT		 745 parport_announce_port(pp);
746
0f36163d 747 usb_set_intfdata(intf, pp);
1da177e4
LT		 748 return 0;
749
1da177e4 750probe_abort:
0f36163d
TS		 751 kill_all_async_requests_priv(priv);
752 kref_put(&priv->ref_count, destroy_priv);
1da177e4
LT		 753 return -ENODEV;
754}
755
756static void uss720_disconnect(struct usb_interface *intf)
757{
0f36163d 758 struct parport *pp = usb_get_intfdata(intf);
1da177e4 759 struct parport_uss720_private *priv;
0f36163d 760 struct usb_device *usbdev;
1da177e4 761
7a2d2810 762 dev_dbg(&intf->dev, "disconnect\n");
0f36163d 763 usb_set_intfdata(intf, NULL);
1da177e4
LT		 764 if (pp) {
765 priv = pp->private_data;
0f36163d 766 usbdev = priv->usbdev;
1da177e4 767 priv->usbdev = NULL;
0f36163d 768 priv->pp = NULL;
7a2d2810 769 dev_dbg(&intf->dev, "parport_remove_port\n");
0f36163d 770 parport_remove_port(pp);
1da177e4 771 parport_put_port(pp);
0f36163d
TS		 772 kill_all_async_requests_priv(priv);
773 kref_put(&priv->ref_count, destroy_priv);
1da177e4 774 }
7a2d2810 775 dev_dbg(&intf->dev, "disconnect done\n");
1da177e4
LT		 776}
777
778/* table of cables that work through this driver */
33b9e162 779static const struct usb_device_id uss720_table[] = {
1da177e4
LT		 780 { USB_DEVICE(0x047e, 0x1001) },
781 { USB_DEVICE(0x0557, 0x2001) },
782 { USB_DEVICE(0x0729, 0x1284) },
783 { USB_DEVICE(0x1293, 0x0002) },
ecc1624a 784 { USB_DEVICE(0x050d, 0x0002) },
1da177e4
LT		 785 { } /* Terminating entry */
786};
787
788MODULE_DEVICE_TABLE (usb, uss720_table);
789
790
791static struct usb_driver uss720_driver = {
1da177e4
LT		 792 .name = "uss720",
793 .probe = uss720_probe,
794 .disconnect = uss720_disconnect,
795 .id_table = uss720_table,
796};
797
798/* --------------------------------------------------------------------- */
799
0f36163d
TS		 800MODULE_AUTHOR(DRIVER_AUTHOR);
801MODULE_DESCRIPTION(DRIVER_DESC);
1da177e4
LT		 802MODULE_LICENSE("GPL");
803
804static int __init uss720_init(void)
805{
806 int retval;
807 retval = usb_register(&uss720_driver);
808 if (retval)
809 goto out;
810
1b29a375
GKH		 811 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
812 DRIVER_DESC "\n");
813 printk(KERN_INFO KBUILD_MODNAME ": NOTE: this is a special purpose "
814 "driver to allow nonstandard\n");
815 printk(KERN_INFO KBUILD_MODNAME ": protocols (eg. bitbang) over "
816 "USS720 usb to parallel cables\n");
817 printk(KERN_INFO KBUILD_MODNAME ": If you just want to connect to a "
818 "printer, use usblp instead\n");
1da177e4
LT		 819out:
820 return retval;
821}
822
823static void __exit uss720_cleanup(void)
824{
825 usb_deregister(&uss720_driver);
826}
827
828module_init(uss720_init);
829module_exit(uss720_cleanup);
830
831/* --------------------------------------------------------------------- */
Linux kernel - Deliverables
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