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Linux v2.6.13
[linux-2.6/next.git] / drivers / usb / image / mdc800.c
bloba330a4b50e1672402743685102a3f1f38618f37e
1 /*
2 * copyright (C) 1999/2000 by Henning Zabel <henning@uni-paderborn.de>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19
20 /*
21 * USB-Kernel Driver for the Mustek MDC800 Digital Camera
22 * (c) 1999/2000 Henning Zabel <henning@uni-paderborn.de>
23 *
24 *
25 * The driver brings the USB functions of the MDC800 to Linux.
26 * To use the Camera you must support the USB Protocol of the camera
27 * to the Kernel Node.
28 * The Driver uses a misc device Node. Create it with :
29 * mknod /dev/mustek c 180 32
30 *
31 * The driver supports only one camera.
32 *
33 * Fix: mdc800 used sleep_on and slept with io_lock held.
34 * Converted sleep_on to waitqueues with schedule_timeout and made io_lock
35 * a semaphore from a spinlock.
36 * by Oliver Neukum <oliver@neukum.name>
37 * (02/12/2001)
38 *
39 * Identify version on module load.
40 * (08/04/2001) gb
41 *
42 * version 0.7.5
43 * Fixed potential SMP races with Spinlocks.
44 * Thanks to Oliver Neukum <oliver@neukum.name> who
45 * noticed the race conditions.
46 * (30/10/2000)
47 *
48 * Fixed: Setting urb->dev before submitting urb.
49 * by Greg KH <greg@kroah.com>
50 * (13/10/2000)
51 *
52 * version 0.7.3
53 * bugfix : The mdc800->state field gets set to READY after the
54 * the diconnect function sets it to NOT_CONNECTED. This makes the
55 * driver running like the camera is connected and causes some
56 * hang ups.
57 *
58 * version 0.7.1
59 * MOD_INC and MOD_DEC are changed in usb_probe to prevent load/unload
60 * problems when compiled as Module.
61 * (04/04/2000)
62 *
63 * The mdc800 driver gets assigned the USB Minor 32-47. The Registration
64 * was updated to use these values.
65 * (26/03/2000)
66 *
67 * The Init und Exit Module Function are updated.
68 * (01/03/2000)
69 *
70 * version 0.7.0
71 * Rewrite of the driver : The driver now uses URB's. The old stuff
72 * has been removed.
73 *
74 * version 0.6.0
75 * Rewrite of this driver: The Emulation of the rs232 protocoll
76 * has been removed from the driver. A special executeCommand function
77 * for this driver is included to gphoto.
78 * The driver supports two kind of communication to bulk endpoints.
79 * Either with the dev->bus->ops->bulk... or with callback function.
80 * (09/11/1999)
81 *
82 * version 0.5.0:
83 * first Version that gets a version number. Most of the needed
84 * functions work.
85 * (20/10/1999)
86 */
87
88 #include <linux/sched.h>
89 #include <linux/signal.h>
90 #include <linux/spinlock.h>
91 #include <linux/errno.h>
92 #include <linux/random.h>
93 #include <linux/poll.h>
94 #include <linux/init.h>
95 #include <linux/slab.h>
96 #include <linux/module.h>
97 #include <linux/smp_lock.h>
98 #include <linux/wait.h>
99
100 #include <linux/usb.h>
101 #include <linux/fs.h>
102
103 /*
104 * Version Information
105 */
106 #define DRIVER_VERSION "v0.7.5 (30/10/2000)"
107 #define DRIVER_AUTHOR "Henning Zabel <henning@uni-paderborn.de>"
108 #define DRIVER_DESC "USB Driver for Mustek MDC800 Digital Camera"
109
110 /* Vendor and Product Information */
111 #define MDC800_VENDOR_ID 0x055f
112 #define MDC800_PRODUCT_ID 0xa800
113
114 /* Timeouts (msec) */
115 #define TO_DOWNLOAD_GET_READY 1500
116 #define TO_DOWNLOAD_GET_BUSY 1500
117 #define TO_WRITE_GET_READY 1000
118 #define TO_DEFAULT_COMMAND 5000
119 #define TO_READ_FROM_IRQ TO_DEFAULT_COMMAND
120 #define TO_GET_READY TO_DEFAULT_COMMAND
121
122 /* Minor Number of the device (create with mknod /dev/mustek c 180 32) */
123 #define MDC800_DEVICE_MINOR_BASE 32
124
125
126 /**************************************************************************
127 Data and structs
128 ***************************************************************************/
129
130
131 typedef enum {
132 NOT_CONNECTED, READY, WORKING, DOWNLOAD
133 } mdc800_state;
134
135
136 /* Data for the driver */
137 struct mdc800_data
138 {
139 struct usb_device * dev; // Device Data
140 mdc800_state state;
141
142 unsigned int endpoint [4];
143
144 struct urb * irq_urb;
145 wait_queue_head_t irq_wait;
146 int irq_woken;
147 char* irq_urb_buffer;
148
149 int camera_busy; // is camera busy ?
150 int camera_request_ready; // Status to synchronize with irq
151 char camera_response [8]; // last Bytes send after busy
152
153 struct urb * write_urb;
154 char* write_urb_buffer;
155 wait_queue_head_t write_wait;
156 int written;
157
158
159 struct urb * download_urb;
160 char* download_urb_buffer;
161 wait_queue_head_t download_wait;
162 int downloaded;
163 int download_left; // Bytes left to download ?
164
165
166 /* Device Data */
167 char out [64]; // Answer Buffer
168 int out_ptr; // Index to the first not readen byte
169 int out_count; // Bytes in the buffer
170
171 int open; // Camera device open ?
172 struct semaphore io_lock; // IO -lock
173
174 char in [8]; // Command Input Buffer
175 int in_count;
176
177 int pic_index; // Cache for the Imagesize (-1 for nothing cached )
178 int pic_len;
179 int minor;
180 };
181
182
183 /* Specification of the Endpoints */
184 static struct usb_endpoint_descriptor mdc800_ed [4] =
185 {
186 {
187 .bLength = 0,
188 .bDescriptorType = 0,
189 .bEndpointAddress = 0x01,
190 .bmAttributes = 0x02,
191 .wMaxPacketSize = __constant_cpu_to_le16(8),
192 .bInterval = 0,
193 .bRefresh = 0,
194 .bSynchAddress = 0,
195 },
196 {
197 .bLength = 0,
198 .bDescriptorType = 0,
199 .bEndpointAddress = 0x82,
200 .bmAttributes = 0x03,
201 .wMaxPacketSize = __constant_cpu_to_le16(8),
202 .bInterval = 0,
203 .bRefresh = 0,
204 .bSynchAddress = 0,
205 },
206 {
207 .bLength = 0,
208 .bDescriptorType = 0,
209 .bEndpointAddress = 0x03,
210 .bmAttributes = 0x02,
211 .wMaxPacketSize = __constant_cpu_to_le16(64),
212 .bInterval = 0,
213 .bRefresh = 0,
214 .bSynchAddress = 0,
215 },
216 {
217 .bLength = 0,
218 .bDescriptorType = 0,
219 .bEndpointAddress = 0x84,
220 .bmAttributes = 0x02,
221 .wMaxPacketSize = __constant_cpu_to_le16(64),
222 .bInterval = 0,
223 .bRefresh = 0,
224 .bSynchAddress = 0,
225 },
226 };
227
228 /* The Variable used by the driver */
229 static struct mdc800_data* mdc800;
230
231
232 /***************************************************************************
233 The USB Part of the driver
234 ****************************************************************************/
235
236 static int mdc800_endpoint_equals (struct usb_endpoint_descriptor *a,struct usb_endpoint_descriptor *b)
237 {
238 return (
239 ( a->bEndpointAddress == b->bEndpointAddress )
240 && ( a->bmAttributes == b->bmAttributes )
241 && ( a->wMaxPacketSize == b->wMaxPacketSize )
242 );
243 }
244
245
246 /*
247 * Checks whether the camera responds busy
248 */
249 static int mdc800_isBusy (char* ch)
250 {
251 int i=0;
252 while (i<8)
253 {
254 if (ch [i] != (char)0x99)
255 return 0;
256 i++;
257 }
258 return 1;
259 }
260
261
262 /*
263 * Checks whether the Camera is ready
264 */
265 static int mdc800_isReady (char *ch)
266 {
267 int i=0;
268 while (i<8)
269 {
270 if (ch [i] != (char)0xbb)
271 return 0;
272 i++;
273 }
274 return 1;
275 }
276
277
278
279 /*
280 * USB IRQ Handler for InputLine
281 */
282 static void mdc800_usb_irq (struct urb *urb, struct pt_regs *res)
283 {
284 int data_received=0, wake_up;
285 unsigned char* b=urb->transfer_buffer;
286 struct mdc800_data* mdc800=urb->context;
287
288 if (urb->status >= 0)
289 {
290
291 //dbg ("%i %i %i %i %i %i %i %i \n",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]);
292
293 if (mdc800_isBusy (b))
294 {
295 if (!mdc800->camera_busy)
296 {
297 mdc800->camera_busy=1;
298 dbg ("gets busy");
299 }
300 }
301 else
302 {
303 if (mdc800->camera_busy && mdc800_isReady (b))
304 {
305 mdc800->camera_busy=0;
306 dbg ("gets ready");
307 }
308 }
309 if (!(mdc800_isBusy (b) || mdc800_isReady (b)))
310 {
311 /* Store Data in camera_answer field */
312 dbg ("%i %i %i %i %i %i %i %i ",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]);
313
314 memcpy (mdc800->camera_response,b,8);
315 data_received=1;
316 }
317 }
318 wake_up= ( mdc800->camera_request_ready > 0 )
319 &&
320 (
321 ((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy))
322 ||
323 ((mdc800->camera_request_ready == 2) && data_received)
324 ||
325 ((mdc800->camera_request_ready == 3) && (mdc800->camera_busy))
326 ||
327 (urb->status < 0)
328 );
329
330 if (wake_up)
331 {
332 mdc800->camera_request_ready=0;
333 mdc800->irq_woken=1;
334 wake_up (&mdc800->irq_wait);
335 }
336 }
337
338
339 /*
340 * Waits a while until the irq responds that camera is ready
341 *
342 * mode : 0: Wait for camera gets ready
343 * 1: Wait for receiving data
344 * 2: Wait for camera gets busy
345 *
346 * msec: Time to wait
347 */
348 static int mdc800_usb_waitForIRQ (int mode, int msec)
349 {
350 mdc800->camera_request_ready=1+mode;
351
352 wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken, msec*HZ/1000);
353 mdc800->irq_woken = 0;
354
355 if (mdc800->camera_request_ready>0)
356 {
357 mdc800->camera_request_ready=0;
358 err ("timeout waiting for camera.");
359 return -1;
360 }
361
362 if (mdc800->state == NOT_CONNECTED)
363 {
364 warn ("Camera gets disconnected during waiting for irq.");
365 mdc800->camera_request_ready=0;
366 return -2;
367 }
368
369 return 0;
370 }
371
372
373 /*
374 * The write_urb callback function
375 */
376 static void mdc800_usb_write_notify (struct urb *urb, struct pt_regs *res)
377 {
378 struct mdc800_data* mdc800=urb->context;
379
380 if (urb->status != 0)
381 {
382 err ("writing command fails (status=%i)", urb->status);
383 }
384 else
385 {
386 mdc800->state=READY;
387 }
388 mdc800->written = 1;
389 wake_up (&mdc800->write_wait);
390 }
391
392
393 /*
394 * The download_urb callback function
395 */
396 static void mdc800_usb_download_notify (struct urb *urb, struct pt_regs *res)
397 {
398 struct mdc800_data* mdc800=urb->context;
399
400 if (urb->status == 0)
401 {
402 /* Fill output buffer with these data */
403 memcpy (mdc800->out, urb->transfer_buffer, 64);
404 mdc800->out_count=64;
405 mdc800->out_ptr=0;
406 mdc800->download_left-=64;
407 if (mdc800->download_left == 0)
408 {
409 mdc800->state=READY;
410 }
411 }
412 else
413 {
414 err ("request bytes fails (status:%i)", urb->status);
415 }
416 mdc800->downloaded = 1;
417 wake_up (&mdc800->download_wait);
418 }
419
420
421 /***************************************************************************
422 Probing for the Camera
423 ***************************************************************************/
424
425 static struct usb_driver mdc800_usb_driver;
426 static struct file_operations mdc800_device_ops;
427 static struct usb_class_driver mdc800_class = {
428 .name = "usb/mdc800%d",
429 .fops = &mdc800_device_ops,
430 .mode = S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
431 .minor_base = MDC800_DEVICE_MINOR_BASE,
432 };
433
434
435 /*
436 * Callback to search the Mustek MDC800 on the USB Bus
437 */
438 static int mdc800_usb_probe (struct usb_interface *intf,
439 const struct usb_device_id *id)
440 {
441 int i,j;
442 struct usb_host_interface *intf_desc;
443 struct usb_device *dev = interface_to_usbdev (intf);
444 int irq_interval=0;
445 int retval;
446
447 dbg ("(mdc800_usb_probe) called.");
448
449
450 if (mdc800->dev != NULL)
451 {
452 warn ("only one Mustek MDC800 is supported.");
453 return -ENODEV;
454 }
455
456 if (dev->descriptor.bNumConfigurations != 1)
457 {
458 err ("probe fails -> wrong Number of Configuration");
459 return -ENODEV;
460 }
461 intf_desc = intf->cur_altsetting;
462
463 if (
464 ( intf_desc->desc.bInterfaceClass != 0xff )
465 || ( intf_desc->desc.bInterfaceSubClass != 0 )
466 || ( intf_desc->desc.bInterfaceProtocol != 0 )
467 || ( intf_desc->desc.bNumEndpoints != 4)
468 )
469 {
470 err ("probe fails -> wrong Interface");
471 return -ENODEV;
472 }
473
474 /* Check the Endpoints */
475 for (i=0; i<4; i++)
476 {
477 mdc800->endpoint[i]=-1;
478 for (j=0; j<4; j++)
479 {
480 if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i]))
481 {
482 mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ;
483 if (i==1)
484 {
485 irq_interval=intf_desc->endpoint [j].desc.bInterval;
486 }
487
488 continue;
489 }
490 }
491 if (mdc800->endpoint[i] == -1)
492 {
493 err ("probe fails -> Wrong Endpoints.");
494 return -ENODEV;
495 }
496 }
497
498
499 info ("Found Mustek MDC800 on USB.");
500
501 down (&mdc800->io_lock);
502
503 retval = usb_register_dev(intf, &mdc800_class);
504 if (retval) {
505 err ("Not able to get a minor for this device.");
506 return -ENODEV;
507 }
508
509 mdc800->dev=dev;
510 mdc800->open=0;
511
512 /* Setup URB Structs */
513 usb_fill_int_urb (
514 mdc800->irq_urb,
515 mdc800->dev,
516 usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]),
517 mdc800->irq_urb_buffer,
518 8,
519 mdc800_usb_irq,
520 mdc800,
521 irq_interval
522 );
523
524 usb_fill_bulk_urb (
525 mdc800->write_urb,
526 mdc800->dev,
527 usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]),
528 mdc800->write_urb_buffer,
529 8,
530 mdc800_usb_write_notify,
531 mdc800
532 );
533
534 usb_fill_bulk_urb (
535 mdc800->download_urb,
536 mdc800->dev,
537 usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]),
538 mdc800->download_urb_buffer,
539 64,
540 mdc800_usb_download_notify,
541 mdc800
542 );
543
544 mdc800->state=READY;
545
546 up (&mdc800->io_lock);
547
548 usb_set_intfdata(intf, mdc800);
549 return 0;
550 }
551
552
553 /*
554 * Disconnect USB device (maybe the MDC800)
555 */
556 static void mdc800_usb_disconnect (struct usb_interface *intf)
557 {
558 struct mdc800_data* mdc800 = usb_get_intfdata(intf);
559
560 dbg ("(mdc800_usb_disconnect) called");
561
562 if (mdc800) {
563 if (mdc800->state == NOT_CONNECTED)
564 return;
565
566 usb_deregister_dev(intf, &mdc800_class);
567
568 mdc800->state=NOT_CONNECTED;
569
570 usb_kill_urb(mdc800->irq_urb);
571 usb_kill_urb(mdc800->write_urb);
572 usb_kill_urb(mdc800->download_urb);
573
574 mdc800->dev = NULL;
575 usb_set_intfdata(intf, NULL);
576 }
577 info ("Mustek MDC800 disconnected from USB.");
578 }
579
580
581 /***************************************************************************
582 The Misc device Part (file_operations)
583 ****************************************************************************/
584
585 /*
586 * This Function calc the Answersize for a command.
587 */
588 static int mdc800_getAnswerSize (char command)
589 {
590 switch ((unsigned char) command)
591 {
592 case 0x2a:
593 case 0x49:
594 case 0x51:
595 case 0x0d:
596 case 0x20:
597 case 0x07:
598 case 0x01:
599 case 0x25:
600 case 0x00:
601 return 8;
602
603 case 0x05:
604 case 0x3e:
605 return mdc800->pic_len;
606
607 case 0x09:
608 return 4096;
609
610 default:
611 return 0;
612 }
613 }
614
615
616 /*
617 * Init the device: (1) alloc mem (2) Increase MOD Count ..
618 */
619 static int mdc800_device_open (struct inode* inode, struct file *file)
620 {
621 int retval=0;
622 int errn=0;
623
624 down (&mdc800->io_lock);
625
626 if (mdc800->state == NOT_CONNECTED)
627 {
628 errn=-EBUSY;
629 goto error_out;
630 }
631 if (mdc800->open)
632 {
633 errn=-EBUSY;
634 goto error_out;
635 }
636
637 mdc800->in_count=0;
638 mdc800->out_count=0;
639 mdc800->out_ptr=0;
640 mdc800->pic_index=0;
641 mdc800->pic_len=-1;
642 mdc800->download_left=0;
643
644 mdc800->camera_busy=0;
645 mdc800->camera_request_ready=0;
646
647 retval=0;
648 mdc800->irq_urb->dev = mdc800->dev;
649 if (usb_submit_urb (mdc800->irq_urb, GFP_KERNEL))
650 {
651 err ("request USB irq fails (submit_retval=%i urb_status=%i).",retval, mdc800->irq_urb->status);
652 errn = -EIO;
653 goto error_out;
654 }
655
656 mdc800->open=1;
657 dbg ("Mustek MDC800 device opened.");
658
659 error_out:
660 up (&mdc800->io_lock);
661 return errn;
662 }
663
664
665 /*
666 * Close the Camera and release Memory
667 */
668 static int mdc800_device_release (struct inode* inode, struct file *file)
669 {
670 int retval=0;
671 dbg ("Mustek MDC800 device closed.");
672
673 down (&mdc800->io_lock);
674 if (mdc800->open && (mdc800->state != NOT_CONNECTED))
675 {
676 usb_kill_urb(mdc800->irq_urb);
677 usb_kill_urb(mdc800->write_urb);
678 usb_kill_urb(mdc800->download_urb);
679 mdc800->open=0;
680 }
681 else
682 {
683 retval=-EIO;
684 }
685
686 up(&mdc800->io_lock);
687 return retval;
688 }
689
690
691 /*
692 * The Device read callback Function
693 */
694 static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos)
695 {
696 size_t left=len, sts=len; /* single transfer size */
697 char __user *ptr = buf;
698
699 down (&mdc800->io_lock);
700 if (mdc800->state == NOT_CONNECTED)
701 {
702 up (&mdc800->io_lock);
703 return -EBUSY;
704 }
705 if (mdc800->state == WORKING)
706 {
707 warn ("Illegal State \"working\" reached during read ?!");
708 up (&mdc800->io_lock);
709 return -EBUSY;
710 }
711 if (!mdc800->open)
712 {
713 up (&mdc800->io_lock);
714 return -EBUSY;
715 }
716
717 while (left)
718 {
719 if (signal_pending (current))
720 {
721 up (&mdc800->io_lock);
722 return -EINTR;
723 }
724
725 sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left;
726
727 if (sts <= 0)
728 {
729 /* Too less Data in buffer */
730 if (mdc800->state == DOWNLOAD)
731 {
732 mdc800->out_count=0;
733 mdc800->out_ptr=0;
734
735 /* Download -> Request new bytes */
736 mdc800->download_urb->dev = mdc800->dev;
737 if (usb_submit_urb (mdc800->download_urb, GFP_KERNEL))
738 {
739 err ("Can't submit download urb (status=%i)",mdc800->download_urb->status);
740 up (&mdc800->io_lock);
741 return len-left;
742 }
743 wait_event_timeout(mdc800->download_wait, mdc800->downloaded,
744 TO_DOWNLOAD_GET_READY*HZ/1000);
745 mdc800->downloaded = 0;
746 if (mdc800->download_urb->status != 0)
747 {
748 err ("request download-bytes fails (status=%i)",mdc800->download_urb->status);
749 up (&mdc800->io_lock);
750 return len-left;
751 }
752 }
753 else
754 {
755 /* No more bytes -> that's an error*/
756 up (&mdc800->io_lock);
757 return -EIO;
758 }
759 }
760 else
761 {
762 /* Copy Bytes */
763 if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
764 sts)) {
765 up(&mdc800->io_lock);
766 return -EFAULT;
767 }
768 ptr+=sts;
769 left-=sts;
770 mdc800->out_ptr+=sts;
771 }
772 }
773
774 up (&mdc800->io_lock);
775 return len-left;
776 }
777
778
779 /*
780 * The Device write callback Function
781 * If a 8Byte Command is received, it will be send to the camera.
782 * After this the driver initiates the request for the answer or
783 * just waits until the camera becomes ready.
784 */
785 static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos)
786 {
787 size_t i=0;
788
789 down (&mdc800->io_lock);
790 if (mdc800->state != READY)
791 {
792 up (&mdc800->io_lock);
793 return -EBUSY;
794 }
795 if (!mdc800->open )
796 {
797 up (&mdc800->io_lock);
798 return -EBUSY;
799 }
800
801 while (i<len)
802 {
803 unsigned char c;
804 if (signal_pending (current))
805 {
806 up (&mdc800->io_lock);
807 return -EINTR;
808 }
809
810 if(get_user(c, buf+i))
811 {
812 up(&mdc800->io_lock);
813 return -EFAULT;
814 }
815
816 /* check for command start */
817 if (c == 0x55)
818 {
819 mdc800->in_count=0;
820 mdc800->out_count=0;
821 mdc800->out_ptr=0;
822 mdc800->download_left=0;
823 }
824
825 /* save command byte */
826 if (mdc800->in_count < 8)
827 {
828 mdc800->in[mdc800->in_count] = c;
829 mdc800->in_count++;
830 }
831 else
832 {
833 up (&mdc800->io_lock);
834 return -EIO;
835 }
836
837 /* Command Buffer full ? -> send it to camera */
838 if (mdc800->in_count == 8)
839 {
840 int answersize;
841
842 if (mdc800_usb_waitForIRQ (0,TO_GET_READY))
843 {
844 err ("Camera didn't get ready.\n");
845 up (&mdc800->io_lock);
846 return -EIO;
847 }
848
849 answersize=mdc800_getAnswerSize (mdc800->in[1]);
850
851 mdc800->state=WORKING;
852 memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8);
853 mdc800->write_urb->dev = mdc800->dev;
854 if (usb_submit_urb (mdc800->write_urb, GFP_KERNEL))
855 {
856 err ("submitting write urb fails (status=%i)", mdc800->write_urb->status);
857 up (&mdc800->io_lock);
858 return -EIO;
859 }
860 wait_event_timeout(mdc800->write_wait, mdc800->written, TO_WRITE_GET_READY*HZ/1000);
861 mdc800->written = 0;
862 if (mdc800->state == WORKING)
863 {
864 usb_kill_urb(mdc800->write_urb);
865 up (&mdc800->io_lock);
866 return -EIO;
867 }
868
869 switch ((unsigned char) mdc800->in[1])
870 {
871 case 0x05: /* Download Image */
872 case 0x3e: /* Take shot in Fine Mode (WCam Mode) */
873 if (mdc800->pic_len < 0)
874 {
875 err ("call 0x07 before 0x05,0x3e");
876 mdc800->state=READY;
877 up (&mdc800->io_lock);
878 return -EIO;
879 }
880 mdc800->pic_len=-1;
881
882 case 0x09: /* Download Thumbnail */
883 mdc800->download_left=answersize+64;
884 mdc800->state=DOWNLOAD;
885 mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY);
886 break;
887
888
889 default:
890 if (answersize)
891 {
892
893 if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ))
894 {
895 err ("requesting answer from irq fails");
896 up (&mdc800->io_lock);
897 return -EIO;
898 }
899
900 /* Write dummy data, (this is ugly but part of the USB Protocol */
901 /* if you use endpoint 1 as bulk and not as irq) */
902 memcpy (mdc800->out, mdc800->camera_response,8);
903
904 /* This is the interpreted answer */
905 memcpy (&mdc800->out[8], mdc800->camera_response,8);
906
907 mdc800->out_ptr=0;
908 mdc800->out_count=16;
909
910 /* Cache the Imagesize, if command was getImageSize */
911 if (mdc800->in [1] == (char) 0x07)
912 {
913 mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2];
914
915 dbg ("cached imagesize = %i",mdc800->pic_len);
916 }
917
918 }
919 else
920 {
921 if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND))
922 {
923 err ("Command Timeout.");
924 up (&mdc800->io_lock);
925 return -EIO;
926 }
927 }
928 mdc800->state=READY;
929 break;
930 }
931 }
932 i++;
933 }
934 up (&mdc800->io_lock);
935 return i;
936 }
937
938
939 /***************************************************************************
940 Init and Cleanup this driver (Structs and types)
941 ****************************************************************************/
942
943 /* File Operations of this drivers */
944 static struct file_operations mdc800_device_ops =
945 {
946 .owner = THIS_MODULE,
947 .read = mdc800_device_read,
948 .write = mdc800_device_write,
949 .open = mdc800_device_open,
950 .release = mdc800_device_release,
951 };
952
953
954
955 static struct usb_device_id mdc800_table [] = {
956 { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) },
957 { } /* Terminating entry */
958 };
959
960 MODULE_DEVICE_TABLE (usb, mdc800_table);
961 /*
962 * USB Driver Struct for this device
963 */
964 static struct usb_driver mdc800_usb_driver =
965 {
966 .owner = THIS_MODULE,
967 .name = "mdc800",
968 .probe = mdc800_usb_probe,
969 .disconnect = mdc800_usb_disconnect,
970 .id_table = mdc800_table
971 };
972
973
974
975 /************************************************************************
976 Init and Cleanup this driver (Main Functions)
977 *************************************************************************/
978
979 #define try(A) if (!(A)) goto cleanup_on_fail;
980
981 static int __init usb_mdc800_init (void)
982 {
983 int retval = -ENODEV;
984 /* Allocate Memory */
985 try (mdc800=kmalloc (sizeof (struct mdc800_data), GFP_KERNEL));
986
987 memset(mdc800, 0, sizeof(struct mdc800_data));
988 mdc800->dev = NULL;
989 mdc800->open=0;
990 mdc800->state=NOT_CONNECTED;
991 init_MUTEX (&mdc800->io_lock);
992
993 init_waitqueue_head (&mdc800->irq_wait);
994 init_waitqueue_head (&mdc800->write_wait);
995 init_waitqueue_head (&mdc800->download_wait);
996
997 mdc800->irq_woken = 0;
998 mdc800->downloaded = 0;
999 mdc800->written = 0;
1000
1001 try (mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL));
1002 try (mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL));
1003 try (mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL));
1004
1005 try (mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL));
1006 try (mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL));
1007 try (mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL));
1008
1009 /* Register the driver */
1010 retval = usb_register(&mdc800_usb_driver);
1011 if (retval)
1012 goto cleanup_on_fail;
1013
1014 info (DRIVER_VERSION ":" DRIVER_DESC);
1015
1016 return 0;
1017
1018 /* Clean driver up, when something fails */
1019
1020 cleanup_on_fail:
1021
1022 if (mdc800 != NULL)
1023 {
1024 err ("can't alloc memory!");
1025
1026 kfree(mdc800->download_urb_buffer);
1027 kfree(mdc800->write_urb_buffer);
1028 kfree(mdc800->irq_urb_buffer);
1029
1030 usb_free_urb(mdc800->write_urb);
1031 usb_free_urb(mdc800->download_urb);
1032 usb_free_urb(mdc800->irq_urb);
1033
1034 kfree (mdc800);
1035 }
1036 mdc800 = NULL;
1037 return retval;
1038 }
1039
1040
1041 static void __exit usb_mdc800_cleanup (void)
1042 {
1043 usb_deregister (&mdc800_usb_driver);
1044
1045 usb_free_urb (mdc800->irq_urb);
1046 usb_free_urb (mdc800->download_urb);
1047 usb_free_urb (mdc800->write_urb);
1048
1049 kfree (mdc800->irq_urb_buffer);
1050 kfree (mdc800->write_urb_buffer);
1051 kfree (mdc800->download_urb_buffer);
1052
1053 kfree (mdc800);
1054 mdc800 = NULL;
1055 }
1056
1057 module_init (usb_mdc800_init);
1058 module_exit (usb_mdc800_cleanup);
1059
1060 MODULE_AUTHOR( DRIVER_AUTHOR );
1061 MODULE_DESCRIPTION( DRIVER_DESC );
1062 MODULE_LICENSE("GPL");
1063
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