]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blame - drivers/usb/image/mdc800.c
projects / mirror_ubuntu-artful-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
USB: remove warn() macro from usb drivers
[mirror_ubuntu-artful-kernel.git] / drivers / usb / image / mdc800.c
CommitLineData
1da177e4
LT		 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.
093cf723 26 * To use the Camera you must support the USB Protocol of the camera
1da177e4
LT		 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>
1da177e4 97#include <linux/wait.h>
4186ecf8 98#include <linux/mutex.h>
1da177e4
LT		 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
131typedef enum {
132 NOT_CONNECTED, READY, WORKING, DOWNLOAD
133} mdc800_state;
134
135
136/* Data for the driver */
137struct 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 ?
4186ecf8 172 struct mutex io_lock; // IO -lock
1da177e4
LT		 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 */
184static 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 */
229static struct mdc800_data* mdc800;
230
231
232/***************************************************************************
233 The USB Part of the driver
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 * Checks whether the camera responds busy
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 * Checks whether the Camera is ready
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 * USB IRQ Handler for InputLine
281 */
7d12e780 282static void mdc800_usb_irq (struct urb *urb)
1da177e4
LT		 283{
284 int data_received=0, wake_up;
285 unsigned char* b=urb->transfer_buffer;
286 struct mdc800_data* mdc800=urb->context;
dd6fa4d7 287 int status = urb->status;
1da177e4 288
dd6fa4d7 289 if (status >= 0) {
1da177e4
LT		 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 ||
dd6fa4d7 327 (status < 0)
1da177e4
LT		 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 */
348static 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 {
3b6004f3
GKH		 364 printk(KERN_WARNING "mdc800: Camera gets disconnected "
365 "during waiting for irq.\n");
1da177e4
LT		 366 mdc800->camera_request_ready=0;
367 return -2;
368 }
369
370 return 0;
371}
372
373
374/*
375 * The write_urb callback function
376 */
7d12e780 377static void mdc800_usb_write_notify (struct urb *urb)
1da177e4
LT		 378{
379 struct mdc800_data* mdc800=urb->context;
dd6fa4d7 380 int status = urb->status;
1da177e4 381
dd6fa4d7
GKH		 382 if (status != 0)
383 err ("writing command fails (status=%i)", status);
1da177e4 384 else
1da177e4 385 mdc800->state=READY;
1da177e4
LT		 386 mdc800->written = 1;
387 wake_up (&mdc800->write_wait);
388}
389
390
391/*
392 * The download_urb callback function
393 */
7d12e780 394static void mdc800_usb_download_notify (struct urb *urb)
1da177e4
LT		 395{
396 struct mdc800_data* mdc800=urb->context;
dd6fa4d7 397 int status = urb->status;
1da177e4 398
dd6fa4d7 399 if (status == 0) {
1da177e4
LT		 400 /* Fill output buffer with these data */
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 }
dd6fa4d7
GKH		 409 } else {
410 err ("request bytes fails (status:%i)", status);
1da177e4
LT		 411 }
412 mdc800->downloaded = 1;
413 wake_up (&mdc800->download_wait);
414}
415
416
417/***************************************************************************
418 Probing for the Camera
419 ***************************************************************************/
420
421static struct usb_driver mdc800_usb_driver;
066202dd 422static const struct file_operations mdc800_device_ops;
1da177e4 423static struct usb_class_driver mdc800_class = {
d6e5bcf4 424 .name = "mdc800%d",
1da177e4 425 .fops = &mdc800_device_ops,
1da177e4
LT		 426 .minor_base = MDC800_DEVICE_MINOR_BASE,
427};
428
429
430/*
431 * Callback to search the Mustek MDC800 on the USB Bus
432 */
433static int mdc800_usb_probe (struct usb_interface *intf,
434 const struct usb_device_id *id)
435{
436 int i,j;
437 struct usb_host_interface *intf_desc;
438 struct usb_device *dev = interface_to_usbdev (intf);
439 int irq_interval=0;
440 int retval;
441
442 dbg ("(mdc800_usb_probe) called.");
443
444
445 if (mdc800->dev != NULL)
446 {
3b6004f3 447 dev_warn(&intf->dev, "only one Mustek MDC800 is supported.\n");
1da177e4
LT		 448 return -ENODEV;
449 }
450
451 if (dev->descriptor.bNumConfigurations != 1)
452 {
453 err ("probe fails -> wrong Number of Configuration");
454 return -ENODEV;
455 }
456 intf_desc = intf->cur_altsetting;
457
458 if (
459 ( intf_desc->desc.bInterfaceClass != 0xff )
460 || ( intf_desc->desc.bInterfaceSubClass != 0 )
461 || ( intf_desc->desc.bInterfaceProtocol != 0 )
462 || ( intf_desc->desc.bNumEndpoints != 4)
463 )
464 {
465 err ("probe fails -> wrong Interface");
466 return -ENODEV;
467 }
468
469 /* Check the Endpoints */
470 for (i=0; i<4; i++)
471 {
472 mdc800->endpoint[i]=-1;
473 for (j=0; j<4; j++)
474 {
475 if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i]))
476 {
477 mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ;
478 if (i==1)
479 {
480 irq_interval=intf_desc->endpoint [j].desc.bInterval;
481 }
1da177e4
LT		 482 }
483 }
484 if (mdc800->endpoint[i] == -1)
485 {
486 err ("probe fails -> Wrong Endpoints.");
487 return -ENODEV;
488 }
489 }
490
491
492 info ("Found Mustek MDC800 on USB.");
493
4186ecf8 494 mutex_lock(&mdc800->io_lock);
1da177e4
LT		 495
496 retval = usb_register_dev(intf, &mdc800_class);
497 if (retval) {
498 err ("Not able to get a minor for this device.");
499 return -ENODEV;
500 }
501
502 mdc800->dev=dev;
503 mdc800->open=0;
504
505 /* Setup URB Structs */
506 usb_fill_int_urb (
507 mdc800->irq_urb,
508 mdc800->dev,
509 usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]),
510 mdc800->irq_urb_buffer,
511 8,
512 mdc800_usb_irq,
513 mdc800,
514 irq_interval
515 );
516
517 usb_fill_bulk_urb (
518 mdc800->write_urb,
519 mdc800->dev,
520 usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]),
521 mdc800->write_urb_buffer,
522 8,
523 mdc800_usb_write_notify,
524 mdc800
525 );
526
527 usb_fill_bulk_urb (
528 mdc800->download_urb,
529 mdc800->dev,
530 usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]),
531 mdc800->download_urb_buffer,
532 64,
533 mdc800_usb_download_notify,
534 mdc800
535 );
536
537 mdc800->state=READY;
538
4186ecf8 539 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 540
541 usb_set_intfdata(intf, mdc800);
542 return 0;
543}
544
545
546/*
547 * Disconnect USB device (maybe the MDC800)
548 */
549static void mdc800_usb_disconnect (struct usb_interface *intf)
550{
551 struct mdc800_data* mdc800 = usb_get_intfdata(intf);
552
553 dbg ("(mdc800_usb_disconnect) called");
554
555 if (mdc800) {
556 if (mdc800->state == NOT_CONNECTED)
557 return;
558
559 usb_deregister_dev(intf, &mdc800_class);
560
f38649fe
ON		 561 /* must be under lock to make sure no URB
562 is submitted after usb_kill_urb() */
563 mutex_lock(&mdc800->io_lock);
1da177e4
LT		 564 mdc800->state=NOT_CONNECTED;
565
566 usb_kill_urb(mdc800->irq_urb);
567 usb_kill_urb(mdc800->write_urb);
568 usb_kill_urb(mdc800->download_urb);
f38649fe 569 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 570
571 mdc800->dev = NULL;
572 usb_set_intfdata(intf, NULL);
573 }
574 info ("Mustek MDC800 disconnected from USB.");
575}
576
577
578/***************************************************************************
579 The Misc device Part (file_operations)
580****************************************************************************/
581
582/*
583 * This Function calc the Answersize for a command.
584 */
585static int mdc800_getAnswerSize (char command)
586{
587 switch ((unsigned char) command)
588 {
589 case 0x2a:
590 case 0x49:
591 case 0x51:
592 case 0x0d:
593 case 0x20:
594 case 0x07:
595 case 0x01:
596 case 0x25:
597 case 0x00:
598 return 8;
599
600 case 0x05:
601 case 0x3e:
602 return mdc800->pic_len;
603
604 case 0x09:
605 return 4096;
606
607 default:
608 return 0;
609 }
610}
611
612
613/*
614 * Init the device: (1) alloc mem (2) Increase MOD Count ..
615 */
616static int mdc800_device_open (struct inode* inode, struct file *file)
617{
618 int retval=0;
619 int errn=0;
620
4186ecf8 621 mutex_lock(&mdc800->io_lock);
1da177e4
LT		 622
623 if (mdc800->state == NOT_CONNECTED)
624 {
625 errn=-EBUSY;
626 goto error_out;
627 }
628 if (mdc800->open)
629 {
630 errn=-EBUSY;
631 goto error_out;
632 }
633
634 mdc800->in_count=0;
635 mdc800->out_count=0;
636 mdc800->out_ptr=0;
637 mdc800->pic_index=0;
638 mdc800->pic_len=-1;
639 mdc800->download_left=0;
640
641 mdc800->camera_busy=0;
642 mdc800->camera_request_ready=0;
643
644 retval=0;
645 mdc800->irq_urb->dev = mdc800->dev;
dd6fa4d7
GKH		 646 retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL);
647 if (retval) {
648 err ("request USB irq fails (submit_retval=%i).", retval);
1da177e4
LT		 649 errn = -EIO;
650 goto error_out;
651 }
652
653 mdc800->open=1;
654 dbg ("Mustek MDC800 device opened.");
655
656error_out:
4186ecf8 657 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 658 return errn;
659}
660
661
662/*
663 * Close the Camera and release Memory
664 */
665static int mdc800_device_release (struct inode* inode, struct file *file)
666{
667 int retval=0;
668 dbg ("Mustek MDC800 device closed.");
669
4186ecf8 670 mutex_lock(&mdc800->io_lock);
1da177e4
LT		 671 if (mdc800->open && (mdc800->state != NOT_CONNECTED))
672 {
673 usb_kill_urb(mdc800->irq_urb);
674 usb_kill_urb(mdc800->write_urb);
675 usb_kill_urb(mdc800->download_urb);
676 mdc800->open=0;
677 }
678 else
679 {
680 retval=-EIO;
681 }
682
4186ecf8 683 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 684 return retval;
685}
686
687
688/*
689 * The Device read callback Function
690 */
691static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos)
692{
693 size_t left=len, sts=len; /* single transfer size */
694 char __user *ptr = buf;
dd6fa4d7 695 int retval;
1da177e4 696
4186ecf8 697 mutex_lock(&mdc800->io_lock);
1da177e4
LT		 698 if (mdc800->state == NOT_CONNECTED)
699 {
4186ecf8 700 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 701 return -EBUSY;
702 }
703 if (mdc800->state == WORKING)
704 {
3b6004f3
GKH		 705 printk(KERN_WARNING "mdc800: Illegal State \"working\""
706 "reached during read ?!\n");
4186ecf8 707 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 708 return -EBUSY;
709 }
710 if (!mdc800->open)
711 {
4186ecf8 712 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 713 return -EBUSY;
714 }
715
716 while (left)
717 {
718 if (signal_pending (current))
719 {
4186ecf8 720 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 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;
dd6fa4d7
GKH		 736 retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL);
737 if (retval) {
738 err ("Can't submit download urb (retval=%i)",retval);
4186ecf8 739 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 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);
4186ecf8 748 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 749 return len-left;
750 }
751 }
752 else
753 {
754 /* No more bytes -> that's an error*/
4186ecf8 755 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 756 return -EIO;
757 }
758 }
759 else
760 {
761 /* Copy Bytes */
762 if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
763 sts)) {
4186ecf8 764 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 765 return -EFAULT;
766 }
767 ptr+=sts;
768 left-=sts;
769 mdc800->out_ptr+=sts;
770 }
771 }
772
4186ecf8 773 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 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 */
784static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos)
785{
786 size_t i=0;
dd6fa4d7 787 int retval;
1da177e4 788
4186ecf8 789 mutex_lock(&mdc800->io_lock);
1da177e4
LT		 790 if (mdc800->state != READY)
791 {
4186ecf8 792 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 793 return -EBUSY;
794 }
795 if (!mdc800->open )
796 {
4186ecf8 797 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 798 return -EBUSY;
799 }
800
801 while (i<len)
802 {
803 unsigned char c;
804 if (signal_pending (current))
805 {
4186ecf8 806 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 807 return -EINTR;
808 }
809
810 if(get_user(c, buf+i))
811 {
4186ecf8 812 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 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 {
4186ecf8 833 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 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");
4186ecf8 845 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 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;
dd6fa4d7
GKH		 854 retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL);
855 if (retval) {
856 err ("submitting write urb fails (retval=%i)", retval);
4186ecf8 857 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 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);
4186ecf8 865 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 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;
4186ecf8 877 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 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");
4186ecf8 896 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 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.");
4186ecf8 924 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 925 return -EIO;
926 }
927 }
928 mdc800->state=READY;
929 break;
930 }
931 }
932 i++;
933 }
4186ecf8 934 mutex_unlock(&mdc800->io_lock);
1da177e4
LT		 935 return i;
936}
937
938
939/***************************************************************************
940 Init and Cleanup this driver (Structs and types)
941****************************************************************************/
942
943/* File Operations of this drivers */
066202dd 944static const struct file_operations mdc800_device_ops =
1da177e4
LT		 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
955static struct usb_device_id mdc800_table [] = {
956 { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) },
957 { } /* Terminating entry */
958};
959
960MODULE_DEVICE_TABLE (usb, mdc800_table);
961/*
962 * USB Driver Struct for this device
963 */
964static struct usb_driver mdc800_usb_driver =
965{
1da177e4
LT		 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
1da177e4
LT		 978static int __init usb_mdc800_init (void)
979{
980 int retval = -ENODEV;
981 /* Allocate Memory */
9ff87d73 982 mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL);
72129cd6
AD		 983 if (!mdc800)
984 goto cleanup_on_fail;
1da177e4 985
1da177e4 986 mdc800->dev = NULL;
1da177e4 987 mdc800->state=NOT_CONNECTED;
4186ecf8 988 mutex_init (&mdc800->io_lock);
1da177e4
LT		 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
72129cd6
AD		 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;
1da177e4
LT		 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
1029cleanup_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
1050static 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
1066module_init (usb_mdc800_init);
1067module_exit (usb_mdc800_cleanup);
1068
1069MODULE_AUTHOR( DRIVER_AUTHOR );
1070MODULE_DESCRIPTION( DRIVER_DESC );
1071MODULE_LICENSE("GPL");
1072
Ubuntu Artful kernel mirror