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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
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
111#define MDC800_VENDOR_ID 0x055f
112#define MDC800_PRODUCT_ID 0xa800
113
114
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
123#define MDC800_DEVICE_MINOR_BASE 32
124
125
126
127
128
129
130
131typedef enum {
132 NOT_CONNECTED, READY, WORKING, DOWNLOAD
133} mdc800_state;
134
135
136
137struct mdc800_data
138{
139 struct usb_device * dev;
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;
150 int camera_request_ready;
151 char camera_response [8];
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;
164
165
166
167 char out [64];
168 int out_ptr;
169 int out_count;
170
171 int open;
172 struct mutex io_lock;
173
174 char in [8];
175 int in_count;
176
177 int pic_index;
178 int pic_len;
179 int minor;
180};
181
182
183
184static struct usb_endpoint_descriptor mdc800_ed [4] =
185{
186 {
187 .bLength = 0,
188 .bDescriptorType = 0,
189 .bEndpointAddress = 0x01,
190 .bmAttributes = 0x02,
191 .wMaxPacketSize = 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 = 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 = 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 = cpu_to_le16(64),
222 .bInterval = 0,
223 .bRefresh = 0,
224 .bSynchAddress = 0,
225 },
226};
227
228
229static struct mdc800_data* mdc800;
230
231
232
233
234
235
236static 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
248
249static 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
264
265static 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
281
282static 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 struct device *dev = &mdc800->dev->dev;
288 int status = urb->status;
289
290 if (status >= 0) {
291 if (mdc800_isBusy (b))
292 {
293 if (!mdc800->camera_busy)
294 {
295 mdc800->camera_busy=1;
296 dev_dbg(dev, "gets busy\n");
297 }
298 }
299 else
300 {
301 if (mdc800->camera_busy && mdc800_isReady (b))
302 {
303 mdc800->camera_busy=0;
304 dev_dbg(dev, "gets ready\n");
305 }
306 }
307 if (!(mdc800_isBusy (b) || mdc800_isReady (b)))
308 {
309
310 dev_dbg(dev, "%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]);
311
312 memcpy (mdc800->camera_response,b,8);
313 data_received=1;
314 }
315 }
316 wake_up= ( mdc800->camera_request_ready > 0 )
317 &&
318 (
319 ((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy))
320 ||
321 ((mdc800->camera_request_ready == 2) && data_received)
322 ||
323 ((mdc800->camera_request_ready == 3) && (mdc800->camera_busy))
324 ||
325 (status < 0)
326 );
327
328 if (wake_up)
329 {
330 mdc800->camera_request_ready=0;
331 mdc800->irq_woken=1;
332 wake_up (&mdc800->irq_wait);
333 }
334}
335
336
337
338
339
340
341
342
343
344
345
346static int mdc800_usb_waitForIRQ (int mode, int msec)
347{
348 mdc800->camera_request_ready=1+mode;
349
350 wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken,
351 msecs_to_jiffies(msec));
352 mdc800->irq_woken = 0;
353
354 if (mdc800->camera_request_ready>0)
355 {
356 mdc800->camera_request_ready=0;
357 dev_err(&mdc800->dev->dev, "timeout waiting for camera.\n");
358 return -1;
359 }
360
361 if (mdc800->state == NOT_CONNECTED)
362 {
363 printk(KERN_WARNING "mdc800: Camera gets disconnected "
364 "during waiting for irq.\n");
365 mdc800->camera_request_ready=0;
366 return -2;
367 }
368
369 return 0;
370}
371
372
373
374
375
376static 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 dev_err(&mdc800->dev->dev,
383 "writing command fails (status=%i)\n", status);
384 else
385 mdc800->state=READY;
386 mdc800->written = 1;
387 wake_up (&mdc800->write_wait);
388}
389
390
391
392
393
394static void mdc800_usb_download_notify (struct urb *urb)
395{
396 struct mdc800_data* mdc800=urb->context;
397 int status = urb->status;
398
399 if (status == 0) {
400
401 memcpy (mdc800->out, urb->transfer_buffer, 64);
402 mdc800->out_count=64;
403 mdc800->out_ptr=0;
404 mdc800->download_left-=64;
405 if (mdc800->download_left == 0)
406 {
407 mdc800->state=READY;
408 }
409 } else {
410 dev_err(&mdc800->dev->dev,
411 "request bytes fails (status:%i)\n", status);
412 }
413 mdc800->downloaded = 1;
414 wake_up (&mdc800->download_wait);
415}
416
417
418
419
420
421
422static struct usb_driver mdc800_usb_driver;
423static const struct file_operations mdc800_device_ops;
424static struct usb_class_driver mdc800_class = {
425 .name = "mdc800%d",
426 .fops = &mdc800_device_ops,
427 .minor_base = MDC800_DEVICE_MINOR_BASE,
428};
429
430
431
432
433
434static int mdc800_usb_probe (struct usb_interface *intf,
435 const struct usb_device_id *id)
436{
437 int i,j;
438 struct usb_host_interface *intf_desc;
439 struct usb_device *dev = interface_to_usbdev (intf);
440 int irq_interval=0;
441 int retval;
442
443 dev_dbg(&intf->dev, "(%s) called.\n", __func__);
444
445
446 if (mdc800->dev != NULL)
447 {
448 dev_warn(&intf->dev, "only one Mustek MDC800 is supported.\n");
449 return -ENODEV;
450 }
451
452 if (dev->descriptor.bNumConfigurations != 1)
453 {
454 dev_err(&intf->dev,
455 "probe fails -> wrong Number of Configuration\n");
456 return -ENODEV;
457 }
458 intf_desc = intf->cur_altsetting;
459
460 if (
461 ( intf_desc->desc.bInterfaceClass != 0xff )
462 || ( intf_desc->desc.bInterfaceSubClass != 0 )
463 || ( intf_desc->desc.bInterfaceProtocol != 0 )
464 || ( intf_desc->desc.bNumEndpoints != 4)
465 )
466 {
467 dev_err(&intf->dev, "probe fails -> wrong Interface\n");
468 return -ENODEV;
469 }
470
471
472 for (i=0; i<4; i++)
473 {
474 mdc800->endpoint[i]=-1;
475 for (j=0; j<4; j++)
476 {
477 if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i]))
478 {
479 mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ;
480 if (i==1)
481 {
482 irq_interval=intf_desc->endpoint [j].desc.bInterval;
483 }
484 }
485 }
486 if (mdc800->endpoint[i] == -1)
487 {
488 dev_err(&intf->dev, "probe fails -> Wrong Endpoints.\n");
489 return -ENODEV;
490 }
491 }
492
493
494 dev_info(&intf->dev, "Found Mustek MDC800 on USB.\n");
495
496 mutex_lock(&mdc800->io_lock);
497
498 retval = usb_register_dev(intf, &mdc800_class);
499 if (retval) {
500 dev_err(&intf->dev, "Not able to get a minor for this device.\n");
501 mutex_unlock(&mdc800->io_lock);
502 return -ENODEV;
503 }
504
505 mdc800->dev=dev;
506 mdc800->open=0;
507
508
509 usb_fill_int_urb (
510 mdc800->irq_urb,
511 mdc800->dev,
512 usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]),
513 mdc800->irq_urb_buffer,
514 8,
515 mdc800_usb_irq,
516 mdc800,
517 irq_interval
518 );
519
520 usb_fill_bulk_urb (
521 mdc800->write_urb,
522 mdc800->dev,
523 usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]),
524 mdc800->write_urb_buffer,
525 8,
526 mdc800_usb_write_notify,
527 mdc800
528 );
529
530 usb_fill_bulk_urb (
531 mdc800->download_urb,
532 mdc800->dev,
533 usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]),
534 mdc800->download_urb_buffer,
535 64,
536 mdc800_usb_download_notify,
537 mdc800
538 );
539
540 mdc800->state=READY;
541
542 mutex_unlock(&mdc800->io_lock);
543
544 usb_set_intfdata(intf, mdc800);
545 return 0;
546}
547
548
549
550
551
552static void mdc800_usb_disconnect (struct usb_interface *intf)
553{
554 struct mdc800_data* mdc800 = usb_get_intfdata(intf);
555
556 dev_dbg(&intf->dev, "(%s) called\n", __func__);
557
558 if (mdc800) {
559 if (mdc800->state == NOT_CONNECTED)
560 return;
561
562 usb_deregister_dev(intf, &mdc800_class);
563
564
565
566 mutex_lock(&mdc800->io_lock);
567 mdc800->state=NOT_CONNECTED;
568
569 usb_kill_urb(mdc800->irq_urb);
570 usb_kill_urb(mdc800->write_urb);
571 usb_kill_urb(mdc800->download_urb);
572 mutex_unlock(&mdc800->io_lock);
573
574 mdc800->dev = NULL;
575 usb_set_intfdata(intf, NULL);
576 }
577 dev_info(&intf->dev, "Mustek MDC800 disconnected from USB.\n");
578}
579
580
581
582
583
584
585
586
587
588static 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
618
619static int mdc800_device_open (struct inode* inode, struct file *file)
620{
621 int retval=0;
622 int errn=0;
623
624 mutex_lock(&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 retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL);
650 if (retval) {
651 dev_err(&mdc800->dev->dev,
652 "request USB irq fails (submit_retval=%i).\n", retval);
653 errn = -EIO;
654 goto error_out;
655 }
656
657 mdc800->open=1;
658 dev_dbg(&mdc800->dev->dev, "Mustek MDC800 device opened.\n");
659
660error_out:
661 mutex_unlock(&mdc800->io_lock);
662 return errn;
663}
664
665
666
667
668
669static int mdc800_device_release (struct inode* inode, struct file *file)
670{
671 int retval=0;
672
673 mutex_lock(&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 mutex_unlock(&mdc800->io_lock);
687 return retval;
688}
689
690
691
692
693
694static 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;
697 char __user *ptr = buf;
698 int retval;
699
700 mutex_lock(&mdc800->io_lock);
701 if (mdc800->state == NOT_CONNECTED)
702 {
703 mutex_unlock(&mdc800->io_lock);
704 return -EBUSY;
705 }
706 if (mdc800->state == WORKING)
707 {
708 printk(KERN_WARNING "mdc800: Illegal State \"working\""
709 "reached during read ?!\n");
710 mutex_unlock(&mdc800->io_lock);
711 return -EBUSY;
712 }
713 if (!mdc800->open)
714 {
715 mutex_unlock(&mdc800->io_lock);
716 return -EBUSY;
717 }
718
719 while (left)
720 {
721 if (signal_pending (current))
722 {
723 mutex_unlock(&mdc800->io_lock);
724 return -EINTR;
725 }
726
727 sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left;
728
729 if (sts <= 0)
730 {
731
732 if (mdc800->state == DOWNLOAD)
733 {
734 mdc800->out_count=0;
735 mdc800->out_ptr=0;
736
737
738 mdc800->download_urb->dev = mdc800->dev;
739 retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL);
740 if (retval) {
741 dev_err(&mdc800->dev->dev,
742 "Can't submit download urb "
743 "(retval=%i)\n", retval);
744 mutex_unlock(&mdc800->io_lock);
745 return len-left;
746 }
747 wait_event_timeout(mdc800->download_wait,
748 mdc800->downloaded,
749 msecs_to_jiffies(TO_DOWNLOAD_GET_READY));
750 mdc800->downloaded = 0;
751 if (mdc800->download_urb->status != 0)
752 {
753 dev_err(&mdc800->dev->dev,
754 "request download-bytes fails "
755 "(status=%i)\n",
756 mdc800->download_urb->status);
757 mutex_unlock(&mdc800->io_lock);
758 return len-left;
759 }
760 }
761 else
762 {
763
764 mutex_unlock(&mdc800->io_lock);
765 return -EIO;
766 }
767 }
768 else
769 {
770
771 if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
772 sts)) {
773 mutex_unlock(&mdc800->io_lock);
774 return -EFAULT;
775 }
776 ptr+=sts;
777 left-=sts;
778 mdc800->out_ptr+=sts;
779 }
780 }
781
782 mutex_unlock(&mdc800->io_lock);
783 return len-left;
784}
785
786
787
788
789
790
791
792
793static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos)
794{
795 size_t i=0;
796 int retval;
797
798 mutex_lock(&mdc800->io_lock);
799 if (mdc800->state != READY)
800 {
801 mutex_unlock(&mdc800->io_lock);
802 return -EBUSY;
803 }
804 if (!mdc800->open )
805 {
806 mutex_unlock(&mdc800->io_lock);
807 return -EBUSY;
808 }
809
810 while (i<len)
811 {
812 unsigned char c;
813 if (signal_pending (current))
814 {
815 mutex_unlock(&mdc800->io_lock);
816 return -EINTR;
817 }
818
819 if(get_user(c, buf+i))
820 {
821 mutex_unlock(&mdc800->io_lock);
822 return -EFAULT;
823 }
824
825
826 if (c == 0x55)
827 {
828 mdc800->in_count=0;
829 mdc800->out_count=0;
830 mdc800->out_ptr=0;
831 mdc800->download_left=0;
832 }
833
834
835 if (mdc800->in_count < 8)
836 {
837 mdc800->in[mdc800->in_count] = c;
838 mdc800->in_count++;
839 }
840 else
841 {
842 mutex_unlock(&mdc800->io_lock);
843 return -EIO;
844 }
845
846
847 if (mdc800->in_count == 8)
848 {
849 int answersize;
850
851 if (mdc800_usb_waitForIRQ (0,TO_GET_READY))
852 {
853 dev_err(&mdc800->dev->dev,
854 "Camera didn't get ready.\n");
855 mutex_unlock(&mdc800->io_lock);
856 return -EIO;
857 }
858
859 answersize=mdc800_getAnswerSize (mdc800->in[1]);
860
861 mdc800->state=WORKING;
862 memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8);
863 mdc800->write_urb->dev = mdc800->dev;
864 retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL);
865 if (retval) {
866 dev_err(&mdc800->dev->dev,
867 "submitting write urb fails "
868 "(retval=%i)\n", retval);
869 mutex_unlock(&mdc800->io_lock);
870 return -EIO;
871 }
872 wait_event_timeout(mdc800->write_wait, mdc800->written,
873 msecs_to_jiffies(TO_WRITE_GET_READY));
874 mdc800->written = 0;
875 if (mdc800->state == WORKING)
876 {
877 usb_kill_urb(mdc800->write_urb);
878 mutex_unlock(&mdc800->io_lock);
879 return -EIO;
880 }
881
882 switch ((unsigned char) mdc800->in[1])
883 {
884 case 0x05:
885 case 0x3e:
886 if (mdc800->pic_len < 0)
887 {
888 dev_err(&mdc800->dev->dev,
889 "call 0x07 before "
890 "0x05,0x3e\n");
891 mdc800->state=READY;
892 mutex_unlock(&mdc800->io_lock);
893 return -EIO;
894 }
895 mdc800->pic_len=-1;
896
897 case 0x09:
898 mdc800->download_left=answersize+64;
899 mdc800->state=DOWNLOAD;
900 mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY);
901 break;
902
903
904 default:
905 if (answersize)
906 {
907
908 if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ))
909 {
910 dev_err(&mdc800->dev->dev, "requesting answer from irq fails\n");
911 mutex_unlock(&mdc800->io_lock);
912 return -EIO;
913 }
914
915
916
917 memcpy (mdc800->out, mdc800->camera_response,8);
918
919
920 memcpy (&mdc800->out[8], mdc800->camera_response,8);
921
922 mdc800->out_ptr=0;
923 mdc800->out_count=16;
924
925
926 if (mdc800->in [1] == (char) 0x07)
927 {
928 mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2];
929
930 dev_dbg(&mdc800->dev->dev, "cached imagesize = %i\n", mdc800->pic_len);
931 }
932
933 }
934 else
935 {
936 if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND))
937 {
938 dev_err(&mdc800->dev->dev, "Command Timeout.\n");
939 mutex_unlock(&mdc800->io_lock);
940 return -EIO;
941 }
942 }
943 mdc800->state=READY;
944 break;
945 }
946 }
947 i++;
948 }
949 mutex_unlock(&mdc800->io_lock);
950 return i;
951}
952
953
954
955
956
957
958
959static const struct file_operations mdc800_device_ops =
960{
961 .owner = THIS_MODULE,
962 .read = mdc800_device_read,
963 .write = mdc800_device_write,
964 .open = mdc800_device_open,
965 .release = mdc800_device_release,
966 .llseek = noop_llseek,
967};
968
969
970
971static const struct usb_device_id mdc800_table[] = {
972 { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) },
973 { }
974};
975
976MODULE_DEVICE_TABLE (usb, mdc800_table);
977
978
979
980static struct usb_driver mdc800_usb_driver =
981{
982 .name = "mdc800",
983 .probe = mdc800_usb_probe,
984 .disconnect = mdc800_usb_disconnect,
985 .id_table = mdc800_table
986};
987
988
989
990
991
992
993
994static int __init usb_mdc800_init (void)
995{
996 int retval = -ENODEV;
997
998 mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL);
999 if (!mdc800)
1000 goto cleanup_on_fail;
1001
1002 mdc800->dev = NULL;
1003 mdc800->state=NOT_CONNECTED;
1004 mutex_init (&mdc800->io_lock);
1005
1006 init_waitqueue_head (&mdc800->irq_wait);
1007 init_waitqueue_head (&mdc800->write_wait);
1008 init_waitqueue_head (&mdc800->download_wait);
1009
1010 mdc800->irq_woken = 0;
1011 mdc800->downloaded = 0;
1012 mdc800->written = 0;
1013
1014 mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL);
1015 if (!mdc800->irq_urb_buffer)
1016 goto cleanup_on_fail;
1017 mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL);
1018 if (!mdc800->write_urb_buffer)
1019 goto cleanup_on_fail;
1020 mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL);
1021 if (!mdc800->download_urb_buffer)
1022 goto cleanup_on_fail;
1023
1024 mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL);
1025 if (!mdc800->irq_urb)
1026 goto cleanup_on_fail;
1027 mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL);
1028 if (!mdc800->download_urb)
1029 goto cleanup_on_fail;
1030 mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL);
1031 if (!mdc800->write_urb)
1032 goto cleanup_on_fail;
1033
1034
1035 retval = usb_register(&mdc800_usb_driver);
1036 if (retval)
1037 goto cleanup_on_fail;
1038
1039 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1040 DRIVER_DESC "\n");
1041
1042 return 0;
1043
1044
1045
1046cleanup_on_fail:
1047
1048 if (mdc800 != NULL)
1049 {
1050 printk(KERN_ERR "mdc800: can't alloc memory!\n");
1051
1052 kfree(mdc800->download_urb_buffer);
1053 kfree(mdc800->write_urb_buffer);
1054 kfree(mdc800->irq_urb_buffer);
1055
1056 usb_free_urb(mdc800->write_urb);
1057 usb_free_urb(mdc800->download_urb);
1058 usb_free_urb(mdc800->irq_urb);
1059
1060 kfree (mdc800);
1061 }
1062 mdc800 = NULL;
1063 return retval;
1064}
1065
1066
1067static void __exit usb_mdc800_cleanup (void)
1068{
1069 usb_deregister (&mdc800_usb_driver);
1070
1071 usb_free_urb (mdc800->irq_urb);
1072 usb_free_urb (mdc800->download_urb);
1073 usb_free_urb (mdc800->write_urb);
1074
1075 kfree (mdc800->irq_urb_buffer);
1076 kfree (mdc800->write_urb_buffer);
1077 kfree (mdc800->download_urb_buffer);
1078
1079 kfree (mdc800);
1080 mdc800 = NULL;
1081}
1082
1083module_init (usb_mdc800_init);
1084module_exit (usb_mdc800_cleanup);
1085
1086MODULE_AUTHOR( DRIVER_AUTHOR );
1087MODULE_DESCRIPTION( DRIVER_DESC );
1088MODULE_LICENSE("GPL");
1089
1090