blob: 878c77ca086e88a3711673b4d2dab2875ecd47a9 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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.
Steven Cole093cf722005-05-03 19:07:24 -060026 * To use the Camera you must support the USB Protocol of the camera
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 * 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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070097#include <linux/wait.h>
Arjan van de Ven4186ecf2006-01-11 15:55:29 +010098#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
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 ?
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100172 struct mutex io_lock; // IO -lock
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
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 */
David Howells7d12e782006-10-05 14:55:46 +0100282static void mdc800_usb_irq (struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283{
284 int data_received=0, wake_up;
285 unsigned char* b=urb->transfer_buffer;
286 struct mdc800_data* mdc800=urb->context;
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700287 int status = urb->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700289 if (status >= 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290
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 ||
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700327 (status < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 );
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;
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700358 dev_err(&mdc800->dev->dev, "timeout waiting for camera.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 return -1;
360 }
361
362 if (mdc800->state == NOT_CONNECTED)
363 {
Greg Kroah-Hartman3b6004f2008-08-14 09:37:34 -0700364 printk(KERN_WARNING "mdc800: Camera gets disconnected "
365 "during waiting for irq.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 mdc800->camera_request_ready=0;
367 return -2;
368 }
369
370 return 0;
371}
372
373
374/*
375 * The write_urb callback function
376 */
David Howells7d12e782006-10-05 14:55:46 +0100377static void mdc800_usb_write_notify (struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378{
379 struct mdc800_data* mdc800=urb->context;
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700380 int status = urb->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700382 if (status != 0)
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700383 dev_err(&mdc800->dev->dev,
384 "writing command fails (status=%i)\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 mdc800->state=READY;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 mdc800->written = 1;
388 wake_up (&mdc800->write_wait);
389}
390
391
392/*
393 * The download_urb callback function
394 */
David Howells7d12e782006-10-05 14:55:46 +0100395static void mdc800_usb_download_notify (struct urb *urb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396{
397 struct mdc800_data* mdc800=urb->context;
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700398 int status = urb->status;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700400 if (status == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 /* Fill output buffer with these data */
402 memcpy (mdc800->out, urb->transfer_buffer, 64);
403 mdc800->out_count=64;
404 mdc800->out_ptr=0;
405 mdc800->download_left-=64;
406 if (mdc800->download_left == 0)
407 {
408 mdc800->state=READY;
409 }
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700410 } else {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700411 dev_err(&mdc800->dev->dev,
412 "request bytes fails (status:%i)\n", status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 }
414 mdc800->downloaded = 1;
415 wake_up (&mdc800->download_wait);
416}
417
418
419/***************************************************************************
420 Probing for the Camera
421 ***************************************************************************/
422
423static struct usb_driver mdc800_usb_driver;
Luiz Fernando N. Capitulino066202d2006-08-05 20:37:11 -0300424static const struct file_operations mdc800_device_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425static struct usb_class_driver mdc800_class = {
Greg Kroah-Hartmand6e5bcf2005-06-20 21:15:16 -0700426 .name = "mdc800%d",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 .fops = &mdc800_device_ops,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 .minor_base = MDC800_DEVICE_MINOR_BASE,
429};
430
431
432/*
433 * Callback to search the Mustek MDC800 on the USB Bus
434 */
435static int mdc800_usb_probe (struct usb_interface *intf,
436 const struct usb_device_id *id)
437{
438 int i,j;
439 struct usb_host_interface *intf_desc;
440 struct usb_device *dev = interface_to_usbdev (intf);
441 int irq_interval=0;
442 int retval;
443
444 dbg ("(mdc800_usb_probe) called.");
445
446
447 if (mdc800->dev != NULL)
448 {
Greg Kroah-Hartman3b6004f2008-08-14 09:37:34 -0700449 dev_warn(&intf->dev, "only one Mustek MDC800 is supported.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 return -ENODEV;
451 }
452
453 if (dev->descriptor.bNumConfigurations != 1)
454 {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700455 dev_err(&intf->dev,
456 "probe fails -> wrong Number of Configuration\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 return -ENODEV;
458 }
459 intf_desc = intf->cur_altsetting;
460
461 if (
462 ( intf_desc->desc.bInterfaceClass != 0xff )
463 || ( intf_desc->desc.bInterfaceSubClass != 0 )
464 || ( intf_desc->desc.bInterfaceProtocol != 0 )
465 || ( intf_desc->desc.bNumEndpoints != 4)
466 )
467 {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700468 dev_err(&intf->dev, "probe fails -> wrong Interface\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 return -ENODEV;
470 }
471
472 /* Check the Endpoints */
473 for (i=0; i<4; i++)
474 {
475 mdc800->endpoint[i]=-1;
476 for (j=0; j<4; j++)
477 {
478 if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i]))
479 {
480 mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ;
481 if (i==1)
482 {
483 irq_interval=intf_desc->endpoint [j].desc.bInterval;
484 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 }
486 }
487 if (mdc800->endpoint[i] == -1)
488 {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700489 dev_err(&intf->dev, "probe fails -> Wrong Endpoints.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 return -ENODEV;
491 }
492 }
493
494
Greg Kroah-Hartman5909f6e2008-08-18 13:21:04 -0700495 dev_info(&intf->dev, "Found Mustek MDC800 on USB.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100497 mutex_lock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
499 retval = usb_register_dev(intf, &mdc800_class);
500 if (retval) {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700501 dev_err(&intf->dev, "Not able to get a minor for this device.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 return -ENODEV;
503 }
504
505 mdc800->dev=dev;
506 mdc800->open=0;
507
508 /* Setup URB Structs */
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
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100542 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543
544 usb_set_intfdata(intf, mdc800);
545 return 0;
546}
547
548
549/*
550 * Disconnect USB device (maybe the MDC800)
551 */
552static void mdc800_usb_disconnect (struct usb_interface *intf)
553{
554 struct mdc800_data* mdc800 = usb_get_intfdata(intf);
555
556 dbg ("(mdc800_usb_disconnect) called");
557
558 if (mdc800) {
559 if (mdc800->state == NOT_CONNECTED)
560 return;
561
562 usb_deregister_dev(intf, &mdc800_class);
563
Oliver Neukumf38649f2007-01-05 17:42:35 +0100564 /* must be under lock to make sure no URB
565 is submitted after usb_kill_urb() */
566 mutex_lock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567 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);
Oliver Neukumf38649f2007-01-05 17:42:35 +0100572 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573
574 mdc800->dev = NULL;
575 usb_set_intfdata(intf, NULL);
576 }
Greg Kroah-Hartman5909f6e2008-08-18 13:21:04 -0700577 dev_info(&intf->dev, "Mustek MDC800 disconnected from USB.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578}
579
580
581/***************************************************************************
582 The Misc device Part (file_operations)
583****************************************************************************/
584
585/*
586 * This Function calc the Answersize for a command.
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 * Init the device: (1) alloc mem (2) Increase MOD Count ..
618 */
619static int mdc800_device_open (struct inode* inode, struct file *file)
620{
621 int retval=0;
622 int errn=0;
623
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100624 mutex_lock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
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;
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700649 retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL);
650 if (retval) {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700651 dev_err(&mdc800->dev->dev,
652 "request USB irq fails (submit_retval=%i).\n", retval);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653 errn = -EIO;
654 goto error_out;
655 }
656
657 mdc800->open=1;
658 dbg ("Mustek MDC800 device opened.");
659
660error_out:
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100661 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 return errn;
663}
664
665
666/*
667 * Close the Camera and release Memory
668 */
669static int mdc800_device_release (struct inode* inode, struct file *file)
670{
671 int retval=0;
672 dbg ("Mustek MDC800 device closed.");
673
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100674 mutex_lock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675 if (mdc800->open && (mdc800->state != NOT_CONNECTED))
676 {
677 usb_kill_urb(mdc800->irq_urb);
678 usb_kill_urb(mdc800->write_urb);
679 usb_kill_urb(mdc800->download_urb);
680 mdc800->open=0;
681 }
682 else
683 {
684 retval=-EIO;
685 }
686
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100687 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688 return retval;
689}
690
691
692/*
693 * The Device read callback Function
694 */
695static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos)
696{
697 size_t left=len, sts=len; /* single transfer size */
698 char __user *ptr = buf;
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700699 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100701 mutex_lock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 if (mdc800->state == NOT_CONNECTED)
703 {
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100704 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 return -EBUSY;
706 }
707 if (mdc800->state == WORKING)
708 {
Greg Kroah-Hartman3b6004f2008-08-14 09:37:34 -0700709 printk(KERN_WARNING "mdc800: Illegal State \"working\""
710 "reached during read ?!\n");
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100711 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 return -EBUSY;
713 }
714 if (!mdc800->open)
715 {
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100716 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717 return -EBUSY;
718 }
719
720 while (left)
721 {
722 if (signal_pending (current))
723 {
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100724 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 return -EINTR;
726 }
727
728 sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left;
729
730 if (sts <= 0)
731 {
732 /* Too less Data in buffer */
733 if (mdc800->state == DOWNLOAD)
734 {
735 mdc800->out_count=0;
736 mdc800->out_ptr=0;
737
738 /* Download -> Request new bytes */
739 mdc800->download_urb->dev = mdc800->dev;
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700740 retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL);
741 if (retval) {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700742 dev_err(&mdc800->dev->dev,
743 "Can't submit download urb "
744 "(retval=%i)\n", retval);
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100745 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 return len-left;
747 }
748 wait_event_timeout(mdc800->download_wait, mdc800->downloaded,
749 TO_DOWNLOAD_GET_READY*HZ/1000);
750 mdc800->downloaded = 0;
751 if (mdc800->download_urb->status != 0)
752 {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700753 dev_err(&mdc800->dev->dev,
754 "request download-bytes fails "
755 "(status=%i)\n",
756 mdc800->download_urb->status);
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100757 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 return len-left;
759 }
760 }
761 else
762 {
763 /* No more bytes -> that's an error*/
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100764 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 return -EIO;
766 }
767 }
768 else
769 {
770 /* Copy Bytes */
771 if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr],
772 sts)) {
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100773 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 return -EFAULT;
775 }
776 ptr+=sts;
777 left-=sts;
778 mdc800->out_ptr+=sts;
779 }
780 }
781
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100782 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 return len-left;
784}
785
786
787/*
788 * The Device write callback Function
789 * If a 8Byte Command is received, it will be send to the camera.
790 * After this the driver initiates the request for the answer or
791 * just waits until the camera becomes ready.
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;
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700796 int retval;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100798 mutex_lock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 if (mdc800->state != READY)
800 {
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100801 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 return -EBUSY;
803 }
804 if (!mdc800->open )
805 {
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100806 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 return -EBUSY;
808 }
809
810 while (i<len)
811 {
812 unsigned char c;
813 if (signal_pending (current))
814 {
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100815 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 return -EINTR;
817 }
818
819 if(get_user(c, buf+i))
820 {
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100821 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 return -EFAULT;
823 }
824
825 /* check for command start */
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 /* save command byte */
835 if (mdc800->in_count < 8)
836 {
837 mdc800->in[mdc800->in_count] = c;
838 mdc800->in_count++;
839 }
840 else
841 {
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100842 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 return -EIO;
844 }
845
846 /* Command Buffer full ? -> send it to camera */
847 if (mdc800->in_count == 8)
848 {
849 int answersize;
850
851 if (mdc800_usb_waitForIRQ (0,TO_GET_READY))
852 {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700853 dev_err(&mdc800->dev->dev,
854 "Camera didn't get ready.\n");
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100855 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 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;
Greg Kroah-Hartmandd6fa4d2007-07-18 10:58:02 -0700864 retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL);
865 if (retval) {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700866 dev_err(&mdc800->dev->dev,
867 "submitting write urb fails "
868 "(retval=%i)\n", retval);
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100869 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 return -EIO;
871 }
872 wait_event_timeout(mdc800->write_wait, mdc800->written, TO_WRITE_GET_READY*HZ/1000);
873 mdc800->written = 0;
874 if (mdc800->state == WORKING)
875 {
876 usb_kill_urb(mdc800->write_urb);
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100877 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878 return -EIO;
879 }
880
881 switch ((unsigned char) mdc800->in[1])
882 {
883 case 0x05: /* Download Image */
884 case 0x3e: /* Take shot in Fine Mode (WCam Mode) */
885 if (mdc800->pic_len < 0)
886 {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700887 dev_err(&mdc800->dev->dev,
888 "call 0x07 before "
889 "0x05,0x3e\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 mdc800->state=READY;
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100891 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 return -EIO;
893 }
894 mdc800->pic_len=-1;
895
896 case 0x09: /* Download Thumbnail */
897 mdc800->download_left=answersize+64;
898 mdc800->state=DOWNLOAD;
899 mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY);
900 break;
901
902
903 default:
904 if (answersize)
905 {
906
907 if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ))
908 {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700909 dev_err(&mdc800->dev->dev, "requesting answer from irq fails\n");
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100910 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700911 return -EIO;
912 }
913
914 /* Write dummy data, (this is ugly but part of the USB Protocol */
915 /* if you use endpoint 1 as bulk and not as irq) */
916 memcpy (mdc800->out, mdc800->camera_response,8);
917
918 /* This is the interpreted answer */
919 memcpy (&mdc800->out[8], mdc800->camera_response,8);
920
921 mdc800->out_ptr=0;
922 mdc800->out_count=16;
923
924 /* Cache the Imagesize, if command was getImageSize */
925 if (mdc800->in [1] == (char) 0x07)
926 {
927 mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2];
928
929 dbg ("cached imagesize = %i",mdc800->pic_len);
930 }
931
932 }
933 else
934 {
935 if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND))
936 {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -0700937 dev_err(&mdc800->dev->dev, "Command Timeout.\n");
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100938 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700939 return -EIO;
940 }
941 }
942 mdc800->state=READY;
943 break;
944 }
945 }
946 i++;
947 }
Arjan van de Ven4186ecf2006-01-11 15:55:29 +0100948 mutex_unlock(&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 return i;
950}
951
952
953/***************************************************************************
954 Init and Cleanup this driver (Structs and types)
955****************************************************************************/
956
957/* File Operations of this drivers */
Luiz Fernando N. Capitulino066202d2006-08-05 20:37:11 -0300958static const struct file_operations mdc800_device_ops =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959{
960 .owner = THIS_MODULE,
961 .read = mdc800_device_read,
962 .write = mdc800_device_write,
963 .open = mdc800_device_open,
964 .release = mdc800_device_release,
965};
966
967
968
969static struct usb_device_id mdc800_table [] = {
970 { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) },
971 { } /* Terminating entry */
972};
973
974MODULE_DEVICE_TABLE (usb, mdc800_table);
975/*
976 * USB Driver Struct for this device
977 */
978static struct usb_driver mdc800_usb_driver =
979{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980 .name = "mdc800",
981 .probe = mdc800_usb_probe,
982 .disconnect = mdc800_usb_disconnect,
983 .id_table = mdc800_table
984};
985
986
987
988/************************************************************************
989 Init and Cleanup this driver (Main Functions)
990*************************************************************************/
991
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992static int __init usb_mdc800_init (void)
993{
994 int retval = -ENODEV;
995 /* Allocate Memory */
Oliver Neukum9ff87d72006-01-06 20:45:11 +0100996 mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL);
Alexey Dobriyan72129cd2005-10-25 23:34:03 +0400997 if (!mdc800)
998 goto cleanup_on_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 mdc800->dev = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 mdc800->state=NOT_CONNECTED;
Arjan van de Ven4186ecf2006-01-11 15:55:29 +01001002 mutex_init (&mdc800->io_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003
1004 init_waitqueue_head (&mdc800->irq_wait);
1005 init_waitqueue_head (&mdc800->write_wait);
1006 init_waitqueue_head (&mdc800->download_wait);
1007
1008 mdc800->irq_woken = 0;
1009 mdc800->downloaded = 0;
1010 mdc800->written = 0;
1011
Alexey Dobriyan72129cd2005-10-25 23:34:03 +04001012 mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL);
1013 if (!mdc800->irq_urb_buffer)
1014 goto cleanup_on_fail;
1015 mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL);
1016 if (!mdc800->write_urb_buffer)
1017 goto cleanup_on_fail;
1018 mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL);
1019 if (!mdc800->download_urb_buffer)
1020 goto cleanup_on_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021
Alexey Dobriyan72129cd2005-10-25 23:34:03 +04001022 mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL);
1023 if (!mdc800->irq_urb)
1024 goto cleanup_on_fail;
1025 mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL);
1026 if (!mdc800->download_urb)
1027 goto cleanup_on_fail;
1028 mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL);
1029 if (!mdc800->write_urb)
1030 goto cleanup_on_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031
1032 /* Register the driver */
1033 retval = usb_register(&mdc800_usb_driver);
1034 if (retval)
1035 goto cleanup_on_fail;
1036
Greg Kroah-Hartman5909f6e2008-08-18 13:21:04 -07001037 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1038 DRIVER_DESC "\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039
1040 return 0;
1041
1042 /* Clean driver up, when something fails */
1043
1044cleanup_on_fail:
1045
1046 if (mdc800 != NULL)
1047 {
Greg Kroah-Hartman802f3892008-08-14 09:37:34 -07001048 printk(KERN_ERR "mdc800: can't alloc memory!\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001049
1050 kfree(mdc800->download_urb_buffer);
1051 kfree(mdc800->write_urb_buffer);
1052 kfree(mdc800->irq_urb_buffer);
1053
1054 usb_free_urb(mdc800->write_urb);
1055 usb_free_urb(mdc800->download_urb);
1056 usb_free_urb(mdc800->irq_urb);
1057
1058 kfree (mdc800);
1059 }
1060 mdc800 = NULL;
1061 return retval;
1062}
1063
1064
1065static void __exit usb_mdc800_cleanup (void)
1066{
1067 usb_deregister (&mdc800_usb_driver);
1068
1069 usb_free_urb (mdc800->irq_urb);
1070 usb_free_urb (mdc800->download_urb);
1071 usb_free_urb (mdc800->write_urb);
1072
1073 kfree (mdc800->irq_urb_buffer);
1074 kfree (mdc800->write_urb_buffer);
1075 kfree (mdc800->download_urb_buffer);
1076
1077 kfree (mdc800);
1078 mdc800 = NULL;
1079}
1080
1081module_init (usb_mdc800_init);
1082module_exit (usb_mdc800_cleanup);
1083
1084MODULE_AUTHOR( DRIVER_AUTHOR );
1085MODULE_DESCRIPTION( DRIVER_DESC );
1086MODULE_LICENSE("GPL");
1087