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allow coexistance of N build and AC build.
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / drivers / usb / image / mdc800.c
blobd1131a87a5b13ad72e40e4f573a6a7ace8979445
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/wait.h>
98 #include <linux/mutex.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 mutex 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)
283 {
284 int data_received=0, wake_up;
285 unsigned char* b=urb->transfer_buffer;
286 struct mdc800_data* mdc800=urb->context;
287 int status = urb->status;
288
289 if (status >= 0) {
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 (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)
377 {
378 struct mdc800_data* mdc800=urb->context;
379 int status = urb->status;
380
381 if (status != 0)
382 err ("writing command fails (status=%i)", status);
383 else
384 mdc800->state=READY;
385 mdc800->written = 1;
386 wake_up (&mdc800->write_wait);
387 }
388
389
390 /*
391 * The download_urb callback function
392 */
393 static void mdc800_usb_download_notify (struct urb *urb)
394 {
395 struct mdc800_data* mdc800=urb->context;
396 int status = urb->status;
397
398 if (status == 0) {
399 /* Fill output buffer with these data */
400 memcpy (mdc800->out, urb->transfer_buffer, 64);
401 mdc800->out_count=64;
402 mdc800->out_ptr=0;
403 mdc800->download_left-=64;
404 if (mdc800->download_left == 0)
405 {
406 mdc800->state=READY;
407 }
408 } else {
409 err ("request bytes fails (status:%i)", status);
410 }
411 mdc800->downloaded = 1;
412 wake_up (&mdc800->download_wait);
413 }
414
415
416 /***************************************************************************
417 Probing for the Camera
418 ***************************************************************************/
419
420 static struct usb_driver mdc800_usb_driver;
421 static const struct file_operations mdc800_device_ops;
422 static struct usb_class_driver mdc800_class = {
423 .name = "mdc800%d",
424 .fops = &mdc800_device_ops,
425 .minor_base = MDC800_DEVICE_MINOR_BASE,
426 };
427
428
429 /*
430 * Callback to search the Mustek MDC800 on the USB Bus
431 */
432 static int mdc800_usb_probe (struct usb_interface *intf,
433 const struct usb_device_id *id)
434 {
435 int i,j;
436 struct usb_host_interface *intf_desc;
437 struct usb_device *dev = interface_to_usbdev (intf);
438 int irq_interval=0;
439 int retval;
440
441 dbg ("(mdc800_usb_probe) called.");
442
443
444 if (mdc800->dev != NULL)
445 {
446 warn ("only one Mustek MDC800 is supported.");
447 return -ENODEV;
448 }
449
450 if (dev->descriptor.bNumConfigurations != 1)
451 {
452 err ("probe fails -> wrong Number of Configuration");
453 return -ENODEV;
454 }
455 intf_desc = intf->cur_altsetting;
456
457 if (
458 ( intf_desc->desc.bInterfaceClass != 0xff )
459 || ( intf_desc->desc.bInterfaceSubClass != 0 )
460 || ( intf_desc->desc.bInterfaceProtocol != 0 )
461 || ( intf_desc->desc.bNumEndpoints != 4)
462 )
463 {
464 err ("probe fails -> wrong Interface");
465 return -ENODEV;
466 }
467
468 /* Check the Endpoints */
469 for (i=0; i<4; i++)
470 {
471 mdc800->endpoint[i]=-1;
472 for (j=0; j<4; j++)
473 {
474 if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i]))
475 {
476 mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ;
477 if (i==1)
478 {
479 irq_interval=intf_desc->endpoint [j].desc.bInterval;
480 }
481
482 continue;
483 }
484 }
485 if (mdc800->endpoint[i] == -1)
486 {
487 err ("probe fails -> Wrong Endpoints.");
488 return -ENODEV;
489 }
490 }
491
492
493 info ("Found Mustek MDC800 on USB.");
494
495 mutex_lock(&mdc800->io_lock);
496
497 retval = usb_register_dev(intf, &mdc800_class);
498 if (retval) {
499 err ("Not able to get a minor for this device.");
500 return -ENODEV;
501 }
502
503 mdc800->dev=dev;
504 mdc800->open=0;
505
506 /* Setup URB Structs */
507 usb_fill_int_urb (
508 mdc800->irq_urb,
509 mdc800->dev,
510 usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]),
511 mdc800->irq_urb_buffer,
512 8,
513 mdc800_usb_irq,
514 mdc800,
515 irq_interval
516 );
517
518 usb_fill_bulk_urb (
519 mdc800->write_urb,
520 mdc800->dev,
521 usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]),
522 mdc800->write_urb_buffer,
523 8,
524 mdc800_usb_write_notify,
525 mdc800
526 );
527
528 usb_fill_bulk_urb (
529 mdc800->download_urb,
530 mdc800->dev,
531 usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]),
532 mdc800->download_urb_buffer,
533 64,
534 mdc800_usb_download_notify,
535 mdc800
536 );
537
538 mdc800->state=READY;
539
540 mutex_unlock(&mdc800->io_lock);
541
542 usb_set_intfdata(intf, mdc800);
543 return 0;
544 }
545
546
547 /*
548 * Disconnect USB device (maybe the MDC800)
549 */
550 static void mdc800_usb_disconnect (struct usb_interface *intf)
551 {
552 struct mdc800_data* mdc800 = usb_get_intfdata(intf);
553
554 dbg ("(mdc800_usb_disconnect) called");
555
556 if (mdc800) {
557 if (mdc800->state == NOT_CONNECTED)
558 return;
559
560 usb_deregister_dev(intf, &mdc800_class);
561
562 /* must be under lock to make sure no URB
563 is submitted after usb_kill_urb() */
564 mutex_lock(&mdc800->io_lock);
565 mdc800->state=NOT_CONNECTED;
566
567 usb_kill_urb(mdc800->irq_urb);
568 usb_kill_urb(mdc800->write_urb);
569 usb_kill_urb(mdc800->download_urb);
570 mutex_unlock(&mdc800->io_lock);
571
572 mdc800->dev = NULL;
573 usb_set_intfdata(intf, NULL);
574 }
575 info ("Mustek MDC800 disconnected from USB.");
576 }
577
578
579 /***************************************************************************
580 The Misc device Part (file_operations)
581 ****************************************************************************/
582
583 /*
584 * This Function calc the Answersize for a command.
585 */
586 static int mdc800_getAnswerSize (char command)
587 {
588 switch ((unsigned char) command)
589 {
590 case 0x2a:
591 case 0x49:
592 case 0x51:
593 case 0x0d:
594 case 0x20:
595 case 0x07:
596 case 0x01:
597 case 0x25:
598 case 0x00:
599 return 8;
600
601 case 0x05:
602 case 0x3e:
603 return mdc800->pic_len;
604
605 case 0x09:
606 return 4096;
607
608 default:
609 return 0;
610 }
611 }
612
613
614 /*
615 * Init the device: (1) alloc mem (2) Increase MOD Count ..
616 */
617 static int mdc800_device_open (struct inode* inode, struct file *file)
618 {
619 int retval=0;
620 int errn=0;
621
622 mutex_lock(&mdc800->io_lock);
623
624 if (mdc800->state == NOT_CONNECTED)
625 {
626 errn=-EBUSY;
627 goto error_out;
628 }
629 if (mdc800->open)
630 {
631 errn=-EBUSY;
632 goto error_out;
633 }
634
635 mdc800->in_count=0;
636 mdc800->out_count=0;
637 mdc800->out_ptr=0;
638 mdc800->pic_index=0;
639 mdc800->pic_len=-1;
640 mdc800->download_left=0;
641
642 mdc800->camera_busy=0;
643 mdc800->camera_request_ready=0;
644
645 retval=0;
646 mdc800->irq_urb->dev = mdc800->dev;
647 retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL);
648 if (retval) {
649 err ("request USB irq fails (submit_retval=%i).", retval);
650 errn = -EIO;
651 goto error_out;
652 }
653
654 mdc800->open=1;
655 dbg ("Mustek MDC800 device opened.");
656
657 error_out:
658 mutex_unlock(&mdc800->io_lock);
659 return errn;
660 }
661
662
663 /*
664 * Close the Camera and release Memory
665 */
666 static int mdc800_device_release (struct inode* inode, struct file *file)
667 {
668 int retval=0;
669 dbg ("Mustek MDC800 device closed.");
670
671 mutex_lock(&mdc800->io_lock);
672 if (mdc800->open && (mdc800->state != NOT_CONNECTED))
673 {
674 usb_kill_urb(mdc800->irq_urb);
675 usb_kill_urb(mdc800->write_urb);
676 usb_kill_urb(mdc800->download_urb);
677 mdc800->open=0;
678 }
679 else
680 {
681 retval=-EIO;
682 }
683
684 mutex_unlock(&mdc800->io_lock);
685 return retval;
686 }
687
688
689 /*
690 * The Device read callback Function
691 */
692 static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos)
693 {
694 size_t left=len, sts=len; /* single transfer size */
695 char __user *ptr = buf;
696 int retval;
697
698 mutex_lock(&mdc800->io_lock);
699 if (mdc800->state == NOT_CONNECTED)
700 {
701 mutex_unlock(&mdc800->io_lock);
702 return -EBUSY;
703 }
704 if (mdc800->state == WORKING)
705 {
706 warn ("Illegal State \"working\" reached during read ?!");
707 mutex_unlock(&mdc800->io_lock);
708 return -EBUSY;
709 }
710 if (!mdc800->open)
711 {
712 mutex_unlock(&mdc800->io_lock);
713 return -EBUSY;
714 }
715
716 while (left)
717 {
718 if (signal_pending (current))
719 {
720 mutex_unlock(&mdc800->io_lock);
721 return -EINTR;
722 }
723
724 sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left;
725
726 if (sts <= 0)
727 {
728 /* Too less Data in buffer */
729 if (mdc800->state == DOWNLOAD)
730 {
731 mdc800->out_count=0;
732 mdc800->out_ptr=0;
733
734 /* Download -> Request new bytes */
735 mdc800->download_urb->dev = mdc800->dev;
736 retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL);
737 if (retval) {
738 err ("Can't submit download urb (retval=%i)",retval);
739 mutex_unlock(&mdc800->io_lock);
740 return len-left;
741 }
742 wait_event_timeout(mdc800->download_wait, mdc800->downloaded,
743 TO_DOWNLOAD_GET_READY*HZ/1000);
744 mdc800->downloaded = 0;
745 if (mdc800->download_urb->status != 0)
746 {
747 err ("request download-bytes fails (status=%i)",mdc800->download_urb->status);
748 mutex_unlock(&mdc800->io_lock);
749 return len-left;
750 }
751 }
752 else
753 {
754 /* No more bytes -> that's an error*/
755 mutex_unlock(&mdc800->io_lock);
756 return -EIO;
757 }
758 }
759 else
760 {
761 /* Copy Bytes */
762 if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
763 sts)) {
764 mutex_unlock(&mdc800->io_lock);
765 return -EFAULT;
766 }
767 ptr+=sts;
768 left-=sts;
769 mdc800->out_ptr+=sts;
770 }
771 }
772
773 mutex_unlock(&mdc800->io_lock);
774 return len-left;
775 }
776
777
778 /*
779 * The Device write callback Function
780 * If a 8Byte Command is received, it will be send to the camera.
781 * After this the driver initiates the request for the answer or
782 * just waits until the camera becomes ready.
783 */
784 static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos)
785 {
786 size_t i=0;
787 int retval;
788
789 mutex_lock(&mdc800->io_lock);
790 if (mdc800->state != READY)
791 {
792 mutex_unlock(&mdc800->io_lock);
793 return -EBUSY;
794 }
795 if (!mdc800->open )
796 {
797 mutex_unlock(&mdc800->io_lock);
798 return -EBUSY;
799 }
800
801 while (i<len)
802 {
803 unsigned char c;
804 if (signal_pending (current))
805 {
806 mutex_unlock(&mdc800->io_lock);
807 return -EINTR;
808 }
809
810 if(get_user(c, buf+i))
811 {
812 mutex_unlock(&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 mutex_unlock(&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 mutex_unlock(&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 retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL);
855 if (retval) {
856 err ("submitting write urb fails (retval=%i)", retval);
857 mutex_unlock(&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 mutex_unlock(&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 mutex_unlock(&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 mutex_unlock(&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 mutex_unlock(&mdc800->io_lock);
925 return -EIO;
926 }
927 }
928 mdc800->state=READY;
929 break;
930 }
931 }
932 i++;
933 }
934 mutex_unlock(&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 const 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 .name = "mdc800",
967 .probe = mdc800_usb_probe,
968 .disconnect = mdc800_usb_disconnect,
969 .id_table = mdc800_table
970 };
971
972
973
974 /************************************************************************
975 Init and Cleanup this driver (Main Functions)
976 *************************************************************************/
977
978 static int __init usb_mdc800_init (void)
979 {
980 int retval = -ENODEV;
981 /* Allocate Memory */
982 mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL);
983 if (!mdc800)
984 goto cleanup_on_fail;
985
986 mdc800->dev = NULL;
987 mdc800->state=NOT_CONNECTED;
988 mutex_init (&mdc800->io_lock);
989
990 init_waitqueue_head (&mdc800->irq_wait);
991 init_waitqueue_head (&mdc800->write_wait);
992 init_waitqueue_head (&mdc800->download_wait);
993
994 mdc800->irq_woken = 0;
995 mdc800->downloaded = 0;
996 mdc800->written = 0;
997
998 mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL);
999 if (!mdc800->irq_urb_buffer)
1000 goto cleanup_on_fail;
1001 mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL);
1002 if (!mdc800->write_urb_buffer)
1003 goto cleanup_on_fail;
1004 mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL);
1005 if (!mdc800->download_urb_buffer)
1006 goto cleanup_on_fail;
1007
1008 mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL);
1009 if (!mdc800->irq_urb)
1010 goto cleanup_on_fail;
1011 mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL);
1012 if (!mdc800->download_urb)
1013 goto cleanup_on_fail;
1014 mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL);
1015 if (!mdc800->write_urb)
1016 goto cleanup_on_fail;
1017
1018 /* Register the driver */
1019 retval = usb_register(&mdc800_usb_driver);
1020 if (retval)
1021 goto cleanup_on_fail;
1022
1023 info (DRIVER_VERSION ":" DRIVER_DESC);
1024
1025 return 0;
1026
1027 /* Clean driver up, when something fails */
1028
1029 cleanup_on_fail:
1030
1031 if (mdc800 != NULL)
1032 {
1033 err ("can't alloc memory!");
1034
1035 kfree(mdc800->download_urb_buffer);
1036 kfree(mdc800->write_urb_buffer);
1037 kfree(mdc800->irq_urb_buffer);
1038
1039 usb_free_urb(mdc800->write_urb);
1040 usb_free_urb(mdc800->download_urb);
1041 usb_free_urb(mdc800->irq_urb);
1042
1043 kfree (mdc800);
1044 }
1045 mdc800 = NULL;
1046 return retval;
1047 }
1048
1049
1050 static void __exit usb_mdc800_cleanup (void)
1051 {
1052 usb_deregister (&mdc800_usb_driver);
1053
1054 usb_free_urb (mdc800->irq_urb);
1055 usb_free_urb (mdc800->download_urb);
1056 usb_free_urb (mdc800->write_urb);
1057
1058 kfree (mdc800->irq_urb_buffer);
1059 kfree (mdc800->write_urb_buffer);
1060 kfree (mdc800->download_urb_buffer);
1061
1062 kfree (mdc800);
1063 mdc800 = NULL;
1064 }
1065
1066 module_init (usb_mdc800_init);
1067 module_exit (usb_mdc800_cleanup);
1068
1069 MODULE_AUTHOR( DRIVER_AUTHOR );
1070 MODULE_DESCRIPTION( DRIVER_DESC );
1071 MODULE_LICENSE("GPL");
1072
Tomato firmware and modifications.