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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 | ||
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 ? | |
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 */ | |
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 | */ | |
7d12e780 | 282 | static 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 | */ | |
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 | */ | |
7d12e780 | 376 | static void mdc800_usb_write_notify (struct urb *urb) |
1da177e4 LT |
377 | { |
378 | struct mdc800_data* mdc800=urb->context; | |
dd6fa4d7 | 379 | int status = urb->status; |
1da177e4 | 380 | |
dd6fa4d7 GKH |
381 | if (status != 0) |
382 | err ("writing command fails (status=%i)", status); | |
1da177e4 | 383 | else |
1da177e4 | 384 | mdc800->state=READY; |
1da177e4 LT |
385 | mdc800->written = 1; |
386 | wake_up (&mdc800->write_wait); | |
387 | } | |
388 | ||
389 | ||
390 | /* | |
391 | * The download_urb callback function | |
392 | */ | |
7d12e780 | 393 | static void mdc800_usb_download_notify (struct urb *urb) |
1da177e4 LT |
394 | { |
395 | struct mdc800_data* mdc800=urb->context; | |
dd6fa4d7 | 396 | int status = urb->status; |
1da177e4 | 397 | |
dd6fa4d7 | 398 | if (status == 0) { |
1da177e4 LT |
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 | } | |
dd6fa4d7 GKH |
408 | } else { |
409 | err ("request bytes fails (status:%i)", status); | |
1da177e4 LT |
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; | |
066202dd | 421 | static const struct file_operations mdc800_device_ops; |
1da177e4 | 422 | static struct usb_class_driver mdc800_class = { |
d6e5bcf4 | 423 | .name = "mdc800%d", |
1da177e4 | 424 | .fops = &mdc800_device_ops, |
1da177e4 LT |
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 | } | |
1da177e4 LT |
481 | } |
482 | } | |
483 | if (mdc800->endpoint[i] == -1) | |
484 | { | |
485 | err ("probe fails -> Wrong Endpoints."); | |
486 | return -ENODEV; | |
487 | } | |
488 | } | |
489 | ||
490 | ||
491 | info ("Found Mustek MDC800 on USB."); | |
492 | ||
4186ecf8 | 493 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
494 | |
495 | retval = usb_register_dev(intf, &mdc800_class); | |
496 | if (retval) { | |
497 | err ("Not able to get a minor for this device."); | |
498 | return -ENODEV; | |
499 | } | |
500 | ||
501 | mdc800->dev=dev; | |
502 | mdc800->open=0; | |
503 | ||
504 | /* Setup URB Structs */ | |
505 | usb_fill_int_urb ( | |
506 | mdc800->irq_urb, | |
507 | mdc800->dev, | |
508 | usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]), | |
509 | mdc800->irq_urb_buffer, | |
510 | 8, | |
511 | mdc800_usb_irq, | |
512 | mdc800, | |
513 | irq_interval | |
514 | ); | |
515 | ||
516 | usb_fill_bulk_urb ( | |
517 | mdc800->write_urb, | |
518 | mdc800->dev, | |
519 | usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]), | |
520 | mdc800->write_urb_buffer, | |
521 | 8, | |
522 | mdc800_usb_write_notify, | |
523 | mdc800 | |
524 | ); | |
525 | ||
526 | usb_fill_bulk_urb ( | |
527 | mdc800->download_urb, | |
528 | mdc800->dev, | |
529 | usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]), | |
530 | mdc800->download_urb_buffer, | |
531 | 64, | |
532 | mdc800_usb_download_notify, | |
533 | mdc800 | |
534 | ); | |
535 | ||
536 | mdc800->state=READY; | |
537 | ||
4186ecf8 | 538 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
539 | |
540 | usb_set_intfdata(intf, mdc800); | |
541 | return 0; | |
542 | } | |
543 | ||
544 | ||
545 | /* | |
546 | * Disconnect USB device (maybe the MDC800) | |
547 | */ | |
548 | static void mdc800_usb_disconnect (struct usb_interface *intf) | |
549 | { | |
550 | struct mdc800_data* mdc800 = usb_get_intfdata(intf); | |
551 | ||
552 | dbg ("(mdc800_usb_disconnect) called"); | |
553 | ||
554 | if (mdc800) { | |
555 | if (mdc800->state == NOT_CONNECTED) | |
556 | return; | |
557 | ||
558 | usb_deregister_dev(intf, &mdc800_class); | |
559 | ||
f38649fe ON |
560 | /* must be under lock to make sure no URB |
561 | is submitted after usb_kill_urb() */ | |
562 | mutex_lock(&mdc800->io_lock); | |
1da177e4 LT |
563 | mdc800->state=NOT_CONNECTED; |
564 | ||
565 | usb_kill_urb(mdc800->irq_urb); | |
566 | usb_kill_urb(mdc800->write_urb); | |
567 | usb_kill_urb(mdc800->download_urb); | |
f38649fe | 568 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
569 | |
570 | mdc800->dev = NULL; | |
571 | usb_set_intfdata(intf, NULL); | |
572 | } | |
573 | info ("Mustek MDC800 disconnected from USB."); | |
574 | } | |
575 | ||
576 | ||
577 | /*************************************************************************** | |
578 | The Misc device Part (file_operations) | |
579 | ****************************************************************************/ | |
580 | ||
581 | /* | |
582 | * This Function calc the Answersize for a command. | |
583 | */ | |
584 | static int mdc800_getAnswerSize (char command) | |
585 | { | |
586 | switch ((unsigned char) command) | |
587 | { | |
588 | case 0x2a: | |
589 | case 0x49: | |
590 | case 0x51: | |
591 | case 0x0d: | |
592 | case 0x20: | |
593 | case 0x07: | |
594 | case 0x01: | |
595 | case 0x25: | |
596 | case 0x00: | |
597 | return 8; | |
598 | ||
599 | case 0x05: | |
600 | case 0x3e: | |
601 | return mdc800->pic_len; | |
602 | ||
603 | case 0x09: | |
604 | return 4096; | |
605 | ||
606 | default: | |
607 | return 0; | |
608 | } | |
609 | } | |
610 | ||
611 | ||
612 | /* | |
613 | * Init the device: (1) alloc mem (2) Increase MOD Count .. | |
614 | */ | |
615 | static int mdc800_device_open (struct inode* inode, struct file *file) | |
616 | { | |
617 | int retval=0; | |
618 | int errn=0; | |
619 | ||
4186ecf8 | 620 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
621 | |
622 | if (mdc800->state == NOT_CONNECTED) | |
623 | { | |
624 | errn=-EBUSY; | |
625 | goto error_out; | |
626 | } | |
627 | if (mdc800->open) | |
628 | { | |
629 | errn=-EBUSY; | |
630 | goto error_out; | |
631 | } | |
632 | ||
633 | mdc800->in_count=0; | |
634 | mdc800->out_count=0; | |
635 | mdc800->out_ptr=0; | |
636 | mdc800->pic_index=0; | |
637 | mdc800->pic_len=-1; | |
638 | mdc800->download_left=0; | |
639 | ||
640 | mdc800->camera_busy=0; | |
641 | mdc800->camera_request_ready=0; | |
642 | ||
643 | retval=0; | |
644 | mdc800->irq_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
645 | retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL); |
646 | if (retval) { | |
647 | err ("request USB irq fails (submit_retval=%i).", retval); | |
1da177e4 LT |
648 | errn = -EIO; |
649 | goto error_out; | |
650 | } | |
651 | ||
652 | mdc800->open=1; | |
653 | dbg ("Mustek MDC800 device opened."); | |
654 | ||
655 | error_out: | |
4186ecf8 | 656 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
657 | return errn; |
658 | } | |
659 | ||
660 | ||
661 | /* | |
662 | * Close the Camera and release Memory | |
663 | */ | |
664 | static int mdc800_device_release (struct inode* inode, struct file *file) | |
665 | { | |
666 | int retval=0; | |
667 | dbg ("Mustek MDC800 device closed."); | |
668 | ||
4186ecf8 | 669 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
670 | if (mdc800->open && (mdc800->state != NOT_CONNECTED)) |
671 | { | |
672 | usb_kill_urb(mdc800->irq_urb); | |
673 | usb_kill_urb(mdc800->write_urb); | |
674 | usb_kill_urb(mdc800->download_urb); | |
675 | mdc800->open=0; | |
676 | } | |
677 | else | |
678 | { | |
679 | retval=-EIO; | |
680 | } | |
681 | ||
4186ecf8 | 682 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
683 | return retval; |
684 | } | |
685 | ||
686 | ||
687 | /* | |
688 | * The Device read callback Function | |
689 | */ | |
690 | static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos) | |
691 | { | |
692 | size_t left=len, sts=len; /* single transfer size */ | |
693 | char __user *ptr = buf; | |
dd6fa4d7 | 694 | int retval; |
1da177e4 | 695 | |
4186ecf8 | 696 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
697 | if (mdc800->state == NOT_CONNECTED) |
698 | { | |
4186ecf8 | 699 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
700 | return -EBUSY; |
701 | } | |
702 | if (mdc800->state == WORKING) | |
703 | { | |
704 | warn ("Illegal State \"working\" reached during read ?!"); | |
4186ecf8 | 705 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
706 | return -EBUSY; |
707 | } | |
708 | if (!mdc800->open) | |
709 | { | |
4186ecf8 | 710 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
711 | return -EBUSY; |
712 | } | |
713 | ||
714 | while (left) | |
715 | { | |
716 | if (signal_pending (current)) | |
717 | { | |
4186ecf8 | 718 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
719 | return -EINTR; |
720 | } | |
721 | ||
722 | sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left; | |
723 | ||
724 | if (sts <= 0) | |
725 | { | |
726 | /* Too less Data in buffer */ | |
727 | if (mdc800->state == DOWNLOAD) | |
728 | { | |
729 | mdc800->out_count=0; | |
730 | mdc800->out_ptr=0; | |
731 | ||
732 | /* Download -> Request new bytes */ | |
733 | mdc800->download_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
734 | retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL); |
735 | if (retval) { | |
736 | err ("Can't submit download urb (retval=%i)",retval); | |
4186ecf8 | 737 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
738 | return len-left; |
739 | } | |
740 | wait_event_timeout(mdc800->download_wait, mdc800->downloaded, | |
741 | TO_DOWNLOAD_GET_READY*HZ/1000); | |
742 | mdc800->downloaded = 0; | |
743 | if (mdc800->download_urb->status != 0) | |
744 | { | |
745 | err ("request download-bytes fails (status=%i)",mdc800->download_urb->status); | |
4186ecf8 | 746 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
747 | return len-left; |
748 | } | |
749 | } | |
750 | else | |
751 | { | |
752 | /* No more bytes -> that's an error*/ | |
4186ecf8 | 753 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
754 | return -EIO; |
755 | } | |
756 | } | |
757 | else | |
758 | { | |
759 | /* Copy Bytes */ | |
760 | if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr], | |
761 | sts)) { | |
4186ecf8 | 762 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
763 | return -EFAULT; |
764 | } | |
765 | ptr+=sts; | |
766 | left-=sts; | |
767 | mdc800->out_ptr+=sts; | |
768 | } | |
769 | } | |
770 | ||
4186ecf8 | 771 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
772 | return len-left; |
773 | } | |
774 | ||
775 | ||
776 | /* | |
777 | * The Device write callback Function | |
778 | * If a 8Byte Command is received, it will be send to the camera. | |
779 | * After this the driver initiates the request for the answer or | |
780 | * just waits until the camera becomes ready. | |
781 | */ | |
782 | static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos) | |
783 | { | |
784 | size_t i=0; | |
dd6fa4d7 | 785 | int retval; |
1da177e4 | 786 | |
4186ecf8 | 787 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
788 | if (mdc800->state != READY) |
789 | { | |
4186ecf8 | 790 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
791 | return -EBUSY; |
792 | } | |
793 | if (!mdc800->open ) | |
794 | { | |
4186ecf8 | 795 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
796 | return -EBUSY; |
797 | } | |
798 | ||
799 | while (i<len) | |
800 | { | |
801 | unsigned char c; | |
802 | if (signal_pending (current)) | |
803 | { | |
4186ecf8 | 804 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
805 | return -EINTR; |
806 | } | |
807 | ||
808 | if(get_user(c, buf+i)) | |
809 | { | |
4186ecf8 | 810 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
811 | return -EFAULT; |
812 | } | |
813 | ||
814 | /* check for command start */ | |
815 | if (c == 0x55) | |
816 | { | |
817 | mdc800->in_count=0; | |
818 | mdc800->out_count=0; | |
819 | mdc800->out_ptr=0; | |
820 | mdc800->download_left=0; | |
821 | } | |
822 | ||
823 | /* save command byte */ | |
824 | if (mdc800->in_count < 8) | |
825 | { | |
826 | mdc800->in[mdc800->in_count] = c; | |
827 | mdc800->in_count++; | |
828 | } | |
829 | else | |
830 | { | |
4186ecf8 | 831 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
832 | return -EIO; |
833 | } | |
834 | ||
835 | /* Command Buffer full ? -> send it to camera */ | |
836 | if (mdc800->in_count == 8) | |
837 | { | |
838 | int answersize; | |
839 | ||
840 | if (mdc800_usb_waitForIRQ (0,TO_GET_READY)) | |
841 | { | |
842 | err ("Camera didn't get ready.\n"); | |
4186ecf8 | 843 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
844 | return -EIO; |
845 | } | |
846 | ||
847 | answersize=mdc800_getAnswerSize (mdc800->in[1]); | |
848 | ||
849 | mdc800->state=WORKING; | |
850 | memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8); | |
851 | mdc800->write_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
852 | retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL); |
853 | if (retval) { | |
854 | err ("submitting write urb fails (retval=%i)", retval); | |
4186ecf8 | 855 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
856 | return -EIO; |
857 | } | |
858 | wait_event_timeout(mdc800->write_wait, mdc800->written, TO_WRITE_GET_READY*HZ/1000); | |
859 | mdc800->written = 0; | |
860 | if (mdc800->state == WORKING) | |
861 | { | |
862 | usb_kill_urb(mdc800->write_urb); | |
4186ecf8 | 863 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
864 | return -EIO; |
865 | } | |
866 | ||
867 | switch ((unsigned char) mdc800->in[1]) | |
868 | { | |
869 | case 0x05: /* Download Image */ | |
870 | case 0x3e: /* Take shot in Fine Mode (WCam Mode) */ | |
871 | if (mdc800->pic_len < 0) | |
872 | { | |
873 | err ("call 0x07 before 0x05,0x3e"); | |
874 | mdc800->state=READY; | |
4186ecf8 | 875 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
876 | return -EIO; |
877 | } | |
878 | mdc800->pic_len=-1; | |
879 | ||
880 | case 0x09: /* Download Thumbnail */ | |
881 | mdc800->download_left=answersize+64; | |
882 | mdc800->state=DOWNLOAD; | |
883 | mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY); | |
884 | break; | |
885 | ||
886 | ||
887 | default: | |
888 | if (answersize) | |
889 | { | |
890 | ||
891 | if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ)) | |
892 | { | |
893 | err ("requesting answer from irq fails"); | |
4186ecf8 | 894 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
895 | return -EIO; |
896 | } | |
897 | ||
898 | /* Write dummy data, (this is ugly but part of the USB Protocol */ | |
899 | /* if you use endpoint 1 as bulk and not as irq) */ | |
900 | memcpy (mdc800->out, mdc800->camera_response,8); | |
901 | ||
902 | /* This is the interpreted answer */ | |
903 | memcpy (&mdc800->out[8], mdc800->camera_response,8); | |
904 | ||
905 | mdc800->out_ptr=0; | |
906 | mdc800->out_count=16; | |
907 | ||
908 | /* Cache the Imagesize, if command was getImageSize */ | |
909 | if (mdc800->in [1] == (char) 0x07) | |
910 | { | |
911 | mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2]; | |
912 | ||
913 | dbg ("cached imagesize = %i",mdc800->pic_len); | |
914 | } | |
915 | ||
916 | } | |
917 | else | |
918 | { | |
919 | if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND)) | |
920 | { | |
921 | err ("Command Timeout."); | |
4186ecf8 | 922 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
923 | return -EIO; |
924 | } | |
925 | } | |
926 | mdc800->state=READY; | |
927 | break; | |
928 | } | |
929 | } | |
930 | i++; | |
931 | } | |
4186ecf8 | 932 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
933 | return i; |
934 | } | |
935 | ||
936 | ||
937 | /*************************************************************************** | |
938 | Init and Cleanup this driver (Structs and types) | |
939 | ****************************************************************************/ | |
940 | ||
941 | /* File Operations of this drivers */ | |
066202dd | 942 | static const struct file_operations mdc800_device_ops = |
1da177e4 LT |
943 | { |
944 | .owner = THIS_MODULE, | |
945 | .read = mdc800_device_read, | |
946 | .write = mdc800_device_write, | |
947 | .open = mdc800_device_open, | |
948 | .release = mdc800_device_release, | |
949 | }; | |
950 | ||
951 | ||
952 | ||
953 | static struct usb_device_id mdc800_table [] = { | |
954 | { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) }, | |
955 | { } /* Terminating entry */ | |
956 | }; | |
957 | ||
958 | MODULE_DEVICE_TABLE (usb, mdc800_table); | |
959 | /* | |
960 | * USB Driver Struct for this device | |
961 | */ | |
962 | static struct usb_driver mdc800_usb_driver = | |
963 | { | |
1da177e4 LT |
964 | .name = "mdc800", |
965 | .probe = mdc800_usb_probe, | |
966 | .disconnect = mdc800_usb_disconnect, | |
967 | .id_table = mdc800_table | |
968 | }; | |
969 | ||
970 | ||
971 | ||
972 | /************************************************************************ | |
973 | Init and Cleanup this driver (Main Functions) | |
974 | *************************************************************************/ | |
975 | ||
1da177e4 LT |
976 | static int __init usb_mdc800_init (void) |
977 | { | |
978 | int retval = -ENODEV; | |
979 | /* Allocate Memory */ | |
9ff87d73 | 980 | mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL); |
72129cd6 AD |
981 | if (!mdc800) |
982 | goto cleanup_on_fail; | |
1da177e4 | 983 | |
1da177e4 | 984 | mdc800->dev = NULL; |
1da177e4 | 985 | mdc800->state=NOT_CONNECTED; |
4186ecf8 | 986 | mutex_init (&mdc800->io_lock); |
1da177e4 LT |
987 | |
988 | init_waitqueue_head (&mdc800->irq_wait); | |
989 | init_waitqueue_head (&mdc800->write_wait); | |
990 | init_waitqueue_head (&mdc800->download_wait); | |
991 | ||
992 | mdc800->irq_woken = 0; | |
993 | mdc800->downloaded = 0; | |
994 | mdc800->written = 0; | |
995 | ||
72129cd6 AD |
996 | mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL); |
997 | if (!mdc800->irq_urb_buffer) | |
998 | goto cleanup_on_fail; | |
999 | mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL); | |
1000 | if (!mdc800->write_urb_buffer) | |
1001 | goto cleanup_on_fail; | |
1002 | mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL); | |
1003 | if (!mdc800->download_urb_buffer) | |
1004 | goto cleanup_on_fail; | |
1005 | ||
1006 | mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1007 | if (!mdc800->irq_urb) | |
1008 | goto cleanup_on_fail; | |
1009 | mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1010 | if (!mdc800->download_urb) | |
1011 | goto cleanup_on_fail; | |
1012 | mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1013 | if (!mdc800->write_urb) | |
1014 | goto cleanup_on_fail; | |
1da177e4 LT |
1015 | |
1016 | /* Register the driver */ | |
1017 | retval = usb_register(&mdc800_usb_driver); | |
1018 | if (retval) | |
1019 | goto cleanup_on_fail; | |
1020 | ||
1021 | info (DRIVER_VERSION ":" DRIVER_DESC); | |
1022 | ||
1023 | return 0; | |
1024 | ||
1025 | /* Clean driver up, when something fails */ | |
1026 | ||
1027 | cleanup_on_fail: | |
1028 | ||
1029 | if (mdc800 != NULL) | |
1030 | { | |
1031 | err ("can't alloc memory!"); | |
1032 | ||
1033 | kfree(mdc800->download_urb_buffer); | |
1034 | kfree(mdc800->write_urb_buffer); | |
1035 | kfree(mdc800->irq_urb_buffer); | |
1036 | ||
1037 | usb_free_urb(mdc800->write_urb); | |
1038 | usb_free_urb(mdc800->download_urb); | |
1039 | usb_free_urb(mdc800->irq_urb); | |
1040 | ||
1041 | kfree (mdc800); | |
1042 | } | |
1043 | mdc800 = NULL; | |
1044 | return retval; | |
1045 | } | |
1046 | ||
1047 | ||
1048 | static void __exit usb_mdc800_cleanup (void) | |
1049 | { | |
1050 | usb_deregister (&mdc800_usb_driver); | |
1051 | ||
1052 | usb_free_urb (mdc800->irq_urb); | |
1053 | usb_free_urb (mdc800->download_urb); | |
1054 | usb_free_urb (mdc800->write_urb); | |
1055 | ||
1056 | kfree (mdc800->irq_urb_buffer); | |
1057 | kfree (mdc800->write_urb_buffer); | |
1058 | kfree (mdc800->download_urb_buffer); | |
1059 | ||
1060 | kfree (mdc800); | |
1061 | mdc800 = NULL; | |
1062 | } | |
1063 | ||
1064 | module_init (usb_mdc800_init); | |
1065 | module_exit (usb_mdc800_cleanup); | |
1066 | ||
1067 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1068 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1069 | MODULE_LICENSE("GPL"); | |
1070 |