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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> | |
97 | #include <linux/smp_lock.h> | |
98 | #include <linux/wait.h> | |
99 | ||
100 | #include <linux/usb.h> | |
101 | #include <linux/fs.h> | |
102 | ||
103 | /* | |
104 | * Version Information | |
105 | */ | |
106 | #define DRIVER_VERSION "v0.7.5 (30/10/2000)" | |
107 | #define DRIVER_AUTHOR "Henning Zabel <henning@uni-paderborn.de>" | |
108 | #define DRIVER_DESC "USB Driver for Mustek MDC800 Digital Camera" | |
109 | ||
110 | /* Vendor and Product Information */ | |
111 | #define MDC800_VENDOR_ID 0x055f | |
112 | #define MDC800_PRODUCT_ID 0xa800 | |
113 | ||
114 | /* Timeouts (msec) */ | |
115 | #define TO_DOWNLOAD_GET_READY 1500 | |
116 | #define TO_DOWNLOAD_GET_BUSY 1500 | |
117 | #define TO_WRITE_GET_READY 1000 | |
118 | #define TO_DEFAULT_COMMAND 5000 | |
119 | #define TO_READ_FROM_IRQ TO_DEFAULT_COMMAND | |
120 | #define TO_GET_READY TO_DEFAULT_COMMAND | |
121 | ||
122 | /* Minor Number of the device (create with mknod /dev/mustek c 180 32) */ | |
123 | #define MDC800_DEVICE_MINOR_BASE 32 | |
124 | ||
125 | ||
126 | /************************************************************************** | |
127 | Data and structs | |
128 | ***************************************************************************/ | |
129 | ||
130 | ||
131 | typedef enum { | |
132 | NOT_CONNECTED, READY, WORKING, DOWNLOAD | |
133 | } mdc800_state; | |
134 | ||
135 | ||
136 | /* Data for the driver */ | |
137 | struct mdc800_data | |
138 | { | |
139 | struct usb_device * dev; // Device Data | |
140 | mdc800_state state; | |
141 | ||
142 | unsigned int endpoint [4]; | |
143 | ||
144 | struct urb * irq_urb; | |
145 | wait_queue_head_t irq_wait; | |
146 | int irq_woken; | |
147 | char* irq_urb_buffer; | |
148 | ||
149 | int camera_busy; // is camera busy ? | |
150 | int camera_request_ready; // Status to synchronize with irq | |
151 | char camera_response [8]; // last Bytes send after busy | |
152 | ||
153 | struct urb * write_urb; | |
154 | char* write_urb_buffer; | |
155 | wait_queue_head_t write_wait; | |
156 | int written; | |
157 | ||
158 | ||
159 | struct urb * download_urb; | |
160 | char* download_urb_buffer; | |
161 | wait_queue_head_t download_wait; | |
162 | int downloaded; | |
163 | int download_left; // Bytes left to download ? | |
164 | ||
165 | ||
166 | /* Device Data */ | |
167 | char out [64]; // Answer Buffer | |
168 | int out_ptr; // Index to the first not readen byte | |
169 | int out_count; // Bytes in the buffer | |
170 | ||
171 | int open; // Camera device open ? | |
172 | struct semaphore io_lock; // IO -lock | |
173 | ||
174 | char in [8]; // Command Input Buffer | |
175 | int in_count; | |
176 | ||
177 | int pic_index; // Cache for the Imagesize (-1 for nothing cached ) | |
178 | int pic_len; | |
179 | int minor; | |
180 | }; | |
181 | ||
182 | ||
183 | /* Specification of the Endpoints */ | |
184 | static struct usb_endpoint_descriptor mdc800_ed [4] = | |
185 | { | |
186 | { | |
187 | .bLength = 0, | |
188 | .bDescriptorType = 0, | |
189 | .bEndpointAddress = 0x01, | |
190 | .bmAttributes = 0x02, | |
191 | .wMaxPacketSize = __constant_cpu_to_le16(8), | |
192 | .bInterval = 0, | |
193 | .bRefresh = 0, | |
194 | .bSynchAddress = 0, | |
195 | }, | |
196 | { | |
197 | .bLength = 0, | |
198 | .bDescriptorType = 0, | |
199 | .bEndpointAddress = 0x82, | |
200 | .bmAttributes = 0x03, | |
201 | .wMaxPacketSize = __constant_cpu_to_le16(8), | |
202 | .bInterval = 0, | |
203 | .bRefresh = 0, | |
204 | .bSynchAddress = 0, | |
205 | }, | |
206 | { | |
207 | .bLength = 0, | |
208 | .bDescriptorType = 0, | |
209 | .bEndpointAddress = 0x03, | |
210 | .bmAttributes = 0x02, | |
211 | .wMaxPacketSize = __constant_cpu_to_le16(64), | |
212 | .bInterval = 0, | |
213 | .bRefresh = 0, | |
214 | .bSynchAddress = 0, | |
215 | }, | |
216 | { | |
217 | .bLength = 0, | |
218 | .bDescriptorType = 0, | |
219 | .bEndpointAddress = 0x84, | |
220 | .bmAttributes = 0x02, | |
221 | .wMaxPacketSize = __constant_cpu_to_le16(64), | |
222 | .bInterval = 0, | |
223 | .bRefresh = 0, | |
224 | .bSynchAddress = 0, | |
225 | }, | |
226 | }; | |
227 | ||
228 | /* The Variable used by the driver */ | |
229 | static struct mdc800_data* mdc800; | |
230 | ||
231 | ||
232 | /*************************************************************************** | |
233 | The USB Part of the driver | |
234 | ****************************************************************************/ | |
235 | ||
236 | static int mdc800_endpoint_equals (struct usb_endpoint_descriptor *a,struct usb_endpoint_descriptor *b) | |
237 | { | |
238 | return ( | |
239 | ( a->bEndpointAddress == b->bEndpointAddress ) | |
240 | && ( a->bmAttributes == b->bmAttributes ) | |
241 | && ( a->wMaxPacketSize == b->wMaxPacketSize ) | |
242 | ); | |
243 | } | |
244 | ||
245 | ||
246 | /* | |
247 | * Checks whether the camera responds busy | |
248 | */ | |
249 | static int mdc800_isBusy (char* ch) | |
250 | { | |
251 | int i=0; | |
252 | while (i<8) | |
253 | { | |
254 | if (ch [i] != (char)0x99) | |
255 | return 0; | |
256 | i++; | |
257 | } | |
258 | return 1; | |
259 | } | |
260 | ||
261 | ||
262 | /* | |
263 | * Checks whether the Camera is ready | |
264 | */ | |
265 | static int mdc800_isReady (char *ch) | |
266 | { | |
267 | int i=0; | |
268 | while (i<8) | |
269 | { | |
270 | if (ch [i] != (char)0xbb) | |
271 | return 0; | |
272 | i++; | |
273 | } | |
274 | return 1; | |
275 | } | |
276 | ||
277 | ||
278 | ||
279 | /* | |
280 | * USB IRQ Handler for InputLine | |
281 | */ | |
282 | static void mdc800_usb_irq (struct urb *urb, struct pt_regs *res) | |
283 | { | |
284 | int data_received=0, wake_up; | |
285 | unsigned char* b=urb->transfer_buffer; | |
286 | struct mdc800_data* mdc800=urb->context; | |
287 | ||
288 | if (urb->status >= 0) | |
289 | { | |
290 | ||
291 | //dbg ("%i %i %i %i %i %i %i %i \n",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]); | |
292 | ||
293 | if (mdc800_isBusy (b)) | |
294 | { | |
295 | if (!mdc800->camera_busy) | |
296 | { | |
297 | mdc800->camera_busy=1; | |
298 | dbg ("gets busy"); | |
299 | } | |
300 | } | |
301 | else | |
302 | { | |
303 | if (mdc800->camera_busy && mdc800_isReady (b)) | |
304 | { | |
305 | mdc800->camera_busy=0; | |
306 | dbg ("gets ready"); | |
307 | } | |
308 | } | |
309 | if (!(mdc800_isBusy (b) || mdc800_isReady (b))) | |
310 | { | |
311 | /* Store Data in camera_answer field */ | |
312 | dbg ("%i %i %i %i %i %i %i %i ",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]); | |
313 | ||
314 | memcpy (mdc800->camera_response,b,8); | |
315 | data_received=1; | |
316 | } | |
317 | } | |
318 | wake_up= ( mdc800->camera_request_ready > 0 ) | |
319 | && | |
320 | ( | |
321 | ((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy)) | |
322 | || | |
323 | ((mdc800->camera_request_ready == 2) && data_received) | |
324 | || | |
325 | ((mdc800->camera_request_ready == 3) && (mdc800->camera_busy)) | |
326 | || | |
327 | (urb->status < 0) | |
328 | ); | |
329 | ||
330 | if (wake_up) | |
331 | { | |
332 | mdc800->camera_request_ready=0; | |
333 | mdc800->irq_woken=1; | |
334 | wake_up (&mdc800->irq_wait); | |
335 | } | |
336 | } | |
337 | ||
338 | ||
339 | /* | |
340 | * Waits a while until the irq responds that camera is ready | |
341 | * | |
342 | * mode : 0: Wait for camera gets ready | |
343 | * 1: Wait for receiving data | |
344 | * 2: Wait for camera gets busy | |
345 | * | |
346 | * msec: Time to wait | |
347 | */ | |
348 | static int mdc800_usb_waitForIRQ (int mode, int msec) | |
349 | { | |
350 | mdc800->camera_request_ready=1+mode; | |
351 | ||
352 | wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken, msec*HZ/1000); | |
353 | mdc800->irq_woken = 0; | |
354 | ||
355 | if (mdc800->camera_request_ready>0) | |
356 | { | |
357 | mdc800->camera_request_ready=0; | |
358 | err ("timeout waiting for camera."); | |
359 | return -1; | |
360 | } | |
361 | ||
362 | if (mdc800->state == NOT_CONNECTED) | |
363 | { | |
364 | warn ("Camera gets disconnected during waiting for irq."); | |
365 | mdc800->camera_request_ready=0; | |
366 | return -2; | |
367 | } | |
368 | ||
369 | return 0; | |
370 | } | |
371 | ||
372 | ||
373 | /* | |
374 | * The write_urb callback function | |
375 | */ | |
376 | static void mdc800_usb_write_notify (struct urb *urb, struct pt_regs *res) | |
377 | { | |
378 | struct mdc800_data* mdc800=urb->context; | |
379 | ||
380 | if (urb->status != 0) | |
381 | { | |
382 | err ("writing command fails (status=%i)", urb->status); | |
383 | } | |
384 | else | |
385 | { | |
386 | mdc800->state=READY; | |
387 | } | |
388 | mdc800->written = 1; | |
389 | wake_up (&mdc800->write_wait); | |
390 | } | |
391 | ||
392 | ||
393 | /* | |
394 | * The download_urb callback function | |
395 | */ | |
396 | static void mdc800_usb_download_notify (struct urb *urb, struct pt_regs *res) | |
397 | { | |
398 | struct mdc800_data* mdc800=urb->context; | |
399 | ||
400 | if (urb->status == 0) | |
401 | { | |
402 | /* Fill output buffer with these data */ | |
403 | memcpy (mdc800->out, urb->transfer_buffer, 64); | |
404 | mdc800->out_count=64; | |
405 | mdc800->out_ptr=0; | |
406 | mdc800->download_left-=64; | |
407 | if (mdc800->download_left == 0) | |
408 | { | |
409 | mdc800->state=READY; | |
410 | } | |
411 | } | |
412 | else | |
413 | { | |
414 | err ("request bytes fails (status:%i)", urb->status); | |
415 | } | |
416 | mdc800->downloaded = 1; | |
417 | wake_up (&mdc800->download_wait); | |
418 | } | |
419 | ||
420 | ||
421 | /*************************************************************************** | |
422 | Probing for the Camera | |
423 | ***************************************************************************/ | |
424 | ||
425 | static struct usb_driver mdc800_usb_driver; | |
426 | static struct file_operations mdc800_device_ops; | |
427 | static struct usb_class_driver mdc800_class = { | |
428 | .name = "usb/mdc800%d", | |
429 | .fops = &mdc800_device_ops, | |
430 | .mode = S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
431 | .minor_base = MDC800_DEVICE_MINOR_BASE, | |
432 | }; | |
433 | ||
434 | ||
435 | /* | |
436 | * Callback to search the Mustek MDC800 on the USB Bus | |
437 | */ | |
438 | static int mdc800_usb_probe (struct usb_interface *intf, | |
439 | const struct usb_device_id *id) | |
440 | { | |
441 | int i,j; | |
442 | struct usb_host_interface *intf_desc; | |
443 | struct usb_device *dev = interface_to_usbdev (intf); | |
444 | int irq_interval=0; | |
445 | int retval; | |
446 | ||
447 | dbg ("(mdc800_usb_probe) called."); | |
448 | ||
449 | ||
450 | if (mdc800->dev != NULL) | |
451 | { | |
452 | warn ("only one Mustek MDC800 is supported."); | |
453 | return -ENODEV; | |
454 | } | |
455 | ||
456 | if (dev->descriptor.bNumConfigurations != 1) | |
457 | { | |
458 | err ("probe fails -> wrong Number of Configuration"); | |
459 | return -ENODEV; | |
460 | } | |
461 | intf_desc = intf->cur_altsetting; | |
462 | ||
463 | if ( | |
464 | ( intf_desc->desc.bInterfaceClass != 0xff ) | |
465 | || ( intf_desc->desc.bInterfaceSubClass != 0 ) | |
466 | || ( intf_desc->desc.bInterfaceProtocol != 0 ) | |
467 | || ( intf_desc->desc.bNumEndpoints != 4) | |
468 | ) | |
469 | { | |
470 | err ("probe fails -> wrong Interface"); | |
471 | return -ENODEV; | |
472 | } | |
473 | ||
474 | /* Check the Endpoints */ | |
475 | for (i=0; i<4; i++) | |
476 | { | |
477 | mdc800->endpoint[i]=-1; | |
478 | for (j=0; j<4; j++) | |
479 | { | |
480 | if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i])) | |
481 | { | |
482 | mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ; | |
483 | if (i==1) | |
484 | { | |
485 | irq_interval=intf_desc->endpoint [j].desc.bInterval; | |
486 | } | |
487 | ||
488 | continue; | |
489 | } | |
490 | } | |
491 | if (mdc800->endpoint[i] == -1) | |
492 | { | |
493 | err ("probe fails -> Wrong Endpoints."); | |
494 | return -ENODEV; | |
495 | } | |
496 | } | |
497 | ||
498 | ||
499 | info ("Found Mustek MDC800 on USB."); | |
500 | ||
501 | down (&mdc800->io_lock); | |
502 | ||
503 | retval = usb_register_dev(intf, &mdc800_class); | |
504 | if (retval) { | |
505 | err ("Not able to get a minor for this device."); | |
506 | return -ENODEV; | |
507 | } | |
508 | ||
509 | mdc800->dev=dev; | |
510 | mdc800->open=0; | |
511 | ||
512 | /* Setup URB Structs */ | |
513 | usb_fill_int_urb ( | |
514 | mdc800->irq_urb, | |
515 | mdc800->dev, | |
516 | usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]), | |
517 | mdc800->irq_urb_buffer, | |
518 | 8, | |
519 | mdc800_usb_irq, | |
520 | mdc800, | |
521 | irq_interval | |
522 | ); | |
523 | ||
524 | usb_fill_bulk_urb ( | |
525 | mdc800->write_urb, | |
526 | mdc800->dev, | |
527 | usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]), | |
528 | mdc800->write_urb_buffer, | |
529 | 8, | |
530 | mdc800_usb_write_notify, | |
531 | mdc800 | |
532 | ); | |
533 | ||
534 | usb_fill_bulk_urb ( | |
535 | mdc800->download_urb, | |
536 | mdc800->dev, | |
537 | usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]), | |
538 | mdc800->download_urb_buffer, | |
539 | 64, | |
540 | mdc800_usb_download_notify, | |
541 | mdc800 | |
542 | ); | |
543 | ||
544 | mdc800->state=READY; | |
545 | ||
546 | up (&mdc800->io_lock); | |
547 | ||
548 | usb_set_intfdata(intf, mdc800); | |
549 | return 0; | |
550 | } | |
551 | ||
552 | ||
553 | /* | |
554 | * Disconnect USB device (maybe the MDC800) | |
555 | */ | |
556 | static void mdc800_usb_disconnect (struct usb_interface *intf) | |
557 | { | |
558 | struct mdc800_data* mdc800 = usb_get_intfdata(intf); | |
559 | ||
560 | dbg ("(mdc800_usb_disconnect) called"); | |
561 | ||
562 | if (mdc800) { | |
563 | if (mdc800->state == NOT_CONNECTED) | |
564 | return; | |
565 | ||
566 | usb_deregister_dev(intf, &mdc800_class); | |
567 | ||
568 | mdc800->state=NOT_CONNECTED; | |
569 | ||
570 | usb_kill_urb(mdc800->irq_urb); | |
571 | usb_kill_urb(mdc800->write_urb); | |
572 | usb_kill_urb(mdc800->download_urb); | |
573 | ||
574 | mdc800->dev = NULL; | |
575 | usb_set_intfdata(intf, NULL); | |
576 | } | |
577 | info ("Mustek MDC800 disconnected from USB."); | |
578 | } | |
579 | ||
580 | ||
581 | /*************************************************************************** | |
582 | The Misc device Part (file_operations) | |
583 | ****************************************************************************/ | |
584 | ||
585 | /* | |
586 | * This Function calc the Answersize for a command. | |
587 | */ | |
588 | static 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 | */ | |
619 | static int mdc800_device_open (struct inode* inode, struct file *file) | |
620 | { | |
621 | int retval=0; | |
622 | int errn=0; | |
623 | ||
624 | down (&mdc800->io_lock); | |
625 | ||
626 | if (mdc800->state == NOT_CONNECTED) | |
627 | { | |
628 | errn=-EBUSY; | |
629 | goto error_out; | |
630 | } | |
631 | if (mdc800->open) | |
632 | { | |
633 | errn=-EBUSY; | |
634 | goto error_out; | |
635 | } | |
636 | ||
637 | mdc800->in_count=0; | |
638 | mdc800->out_count=0; | |
639 | mdc800->out_ptr=0; | |
640 | mdc800->pic_index=0; | |
641 | mdc800->pic_len=-1; | |
642 | mdc800->download_left=0; | |
643 | ||
644 | mdc800->camera_busy=0; | |
645 | mdc800->camera_request_ready=0; | |
646 | ||
647 | retval=0; | |
648 | mdc800->irq_urb->dev = mdc800->dev; | |
649 | if (usb_submit_urb (mdc800->irq_urb, GFP_KERNEL)) | |
650 | { | |
651 | err ("request USB irq fails (submit_retval=%i urb_status=%i).",retval, mdc800->irq_urb->status); | |
652 | errn = -EIO; | |
653 | goto error_out; | |
654 | } | |
655 | ||
656 | mdc800->open=1; | |
657 | dbg ("Mustek MDC800 device opened."); | |
658 | ||
659 | error_out: | |
660 | up (&mdc800->io_lock); | |
661 | return errn; | |
662 | } | |
663 | ||
664 | ||
665 | /* | |
666 | * Close the Camera and release Memory | |
667 | */ | |
668 | static int mdc800_device_release (struct inode* inode, struct file *file) | |
669 | { | |
670 | int retval=0; | |
671 | dbg ("Mustek MDC800 device closed."); | |
672 | ||
673 | down (&mdc800->io_lock); | |
674 | if (mdc800->open && (mdc800->state != NOT_CONNECTED)) | |
675 | { | |
676 | usb_kill_urb(mdc800->irq_urb); | |
677 | usb_kill_urb(mdc800->write_urb); | |
678 | usb_kill_urb(mdc800->download_urb); | |
679 | mdc800->open=0; | |
680 | } | |
681 | else | |
682 | { | |
683 | retval=-EIO; | |
684 | } | |
685 | ||
686 | up(&mdc800->io_lock); | |
687 | return retval; | |
688 | } | |
689 | ||
690 | ||
691 | /* | |
692 | * The Device read callback Function | |
693 | */ | |
694 | static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos) | |
695 | { | |
696 | size_t left=len, sts=len; /* single transfer size */ | |
697 | char __user *ptr = buf; | |
698 | ||
699 | down (&mdc800->io_lock); | |
700 | if (mdc800->state == NOT_CONNECTED) | |
701 | { | |
702 | up (&mdc800->io_lock); | |
703 | return -EBUSY; | |
704 | } | |
705 | if (mdc800->state == WORKING) | |
706 | { | |
707 | warn ("Illegal State \"working\" reached during read ?!"); | |
708 | up (&mdc800->io_lock); | |
709 | return -EBUSY; | |
710 | } | |
711 | if (!mdc800->open) | |
712 | { | |
713 | up (&mdc800->io_lock); | |
714 | return -EBUSY; | |
715 | } | |
716 | ||
717 | while (left) | |
718 | { | |
719 | if (signal_pending (current)) | |
720 | { | |
721 | up (&mdc800->io_lock); | |
722 | return -EINTR; | |
723 | } | |
724 | ||
725 | sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left; | |
726 | ||
727 | if (sts <= 0) | |
728 | { | |
729 | /* Too less Data in buffer */ | |
730 | if (mdc800->state == DOWNLOAD) | |
731 | { | |
732 | mdc800->out_count=0; | |
733 | mdc800->out_ptr=0; | |
734 | ||
735 | /* Download -> Request new bytes */ | |
736 | mdc800->download_urb->dev = mdc800->dev; | |
737 | if (usb_submit_urb (mdc800->download_urb, GFP_KERNEL)) | |
738 | { | |
739 | err ("Can't submit download urb (status=%i)",mdc800->download_urb->status); | |
740 | up (&mdc800->io_lock); | |
741 | return len-left; | |
742 | } | |
743 | wait_event_timeout(mdc800->download_wait, mdc800->downloaded, | |
744 | TO_DOWNLOAD_GET_READY*HZ/1000); | |
745 | mdc800->downloaded = 0; | |
746 | if (mdc800->download_urb->status != 0) | |
747 | { | |
748 | err ("request download-bytes fails (status=%i)",mdc800->download_urb->status); | |
749 | up (&mdc800->io_lock); | |
750 | return len-left; | |
751 | } | |
752 | } | |
753 | else | |
754 | { | |
755 | /* No more bytes -> that's an error*/ | |
756 | up (&mdc800->io_lock); | |
757 | return -EIO; | |
758 | } | |
759 | } | |
760 | else | |
761 | { | |
762 | /* Copy Bytes */ | |
763 | if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr], | |
764 | sts)) { | |
765 | up(&mdc800->io_lock); | |
766 | return -EFAULT; | |
767 | } | |
768 | ptr+=sts; | |
769 | left-=sts; | |
770 | mdc800->out_ptr+=sts; | |
771 | } | |
772 | } | |
773 | ||
774 | up (&mdc800->io_lock); | |
775 | return len-left; | |
776 | } | |
777 | ||
778 | ||
779 | /* | |
780 | * The Device write callback Function | |
781 | * If a 8Byte Command is received, it will be send to the camera. | |
782 | * After this the driver initiates the request for the answer or | |
783 | * just waits until the camera becomes ready. | |
784 | */ | |
785 | static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos) | |
786 | { | |
787 | size_t i=0; | |
788 | ||
789 | down (&mdc800->io_lock); | |
790 | if (mdc800->state != READY) | |
791 | { | |
792 | up (&mdc800->io_lock); | |
793 | return -EBUSY; | |
794 | } | |
795 | if (!mdc800->open ) | |
796 | { | |
797 | up (&mdc800->io_lock); | |
798 | return -EBUSY; | |
799 | } | |
800 | ||
801 | while (i<len) | |
802 | { | |
803 | unsigned char c; | |
804 | if (signal_pending (current)) | |
805 | { | |
806 | up (&mdc800->io_lock); | |
807 | return -EINTR; | |
808 | } | |
809 | ||
810 | if(get_user(c, buf+i)) | |
811 | { | |
812 | up(&mdc800->io_lock); | |
813 | return -EFAULT; | |
814 | } | |
815 | ||
816 | /* check for command start */ | |
817 | if (c == 0x55) | |
818 | { | |
819 | mdc800->in_count=0; | |
820 | mdc800->out_count=0; | |
821 | mdc800->out_ptr=0; | |
822 | mdc800->download_left=0; | |
823 | } | |
824 | ||
825 | /* save command byte */ | |
826 | if (mdc800->in_count < 8) | |
827 | { | |
828 | mdc800->in[mdc800->in_count] = c; | |
829 | mdc800->in_count++; | |
830 | } | |
831 | else | |
832 | { | |
833 | up (&mdc800->io_lock); | |
834 | return -EIO; | |
835 | } | |
836 | ||
837 | /* Command Buffer full ? -> send it to camera */ | |
838 | if (mdc800->in_count == 8) | |
839 | { | |
840 | int answersize; | |
841 | ||
842 | if (mdc800_usb_waitForIRQ (0,TO_GET_READY)) | |
843 | { | |
844 | err ("Camera didn't get ready.\n"); | |
845 | up (&mdc800->io_lock); | |
846 | return -EIO; | |
847 | } | |
848 | ||
849 | answersize=mdc800_getAnswerSize (mdc800->in[1]); | |
850 | ||
851 | mdc800->state=WORKING; | |
852 | memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8); | |
853 | mdc800->write_urb->dev = mdc800->dev; | |
854 | if (usb_submit_urb (mdc800->write_urb, GFP_KERNEL)) | |
855 | { | |
856 | err ("submitting write urb fails (status=%i)", mdc800->write_urb->status); | |
857 | up (&mdc800->io_lock); | |
858 | return -EIO; | |
859 | } | |
860 | wait_event_timeout(mdc800->write_wait, mdc800->written, TO_WRITE_GET_READY*HZ/1000); | |
861 | mdc800->written = 0; | |
862 | if (mdc800->state == WORKING) | |
863 | { | |
864 | usb_kill_urb(mdc800->write_urb); | |
865 | up (&mdc800->io_lock); | |
866 | return -EIO; | |
867 | } | |
868 | ||
869 | switch ((unsigned char) mdc800->in[1]) | |
870 | { | |
871 | case 0x05: /* Download Image */ | |
872 | case 0x3e: /* Take shot in Fine Mode (WCam Mode) */ | |
873 | if (mdc800->pic_len < 0) | |
874 | { | |
875 | err ("call 0x07 before 0x05,0x3e"); | |
876 | mdc800->state=READY; | |
877 | up (&mdc800->io_lock); | |
878 | return -EIO; | |
879 | } | |
880 | mdc800->pic_len=-1; | |
881 | ||
882 | case 0x09: /* Download Thumbnail */ | |
883 | mdc800->download_left=answersize+64; | |
884 | mdc800->state=DOWNLOAD; | |
885 | mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY); | |
886 | break; | |
887 | ||
888 | ||
889 | default: | |
890 | if (answersize) | |
891 | { | |
892 | ||
893 | if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ)) | |
894 | { | |
895 | err ("requesting answer from irq fails"); | |
896 | up (&mdc800->io_lock); | |
897 | return -EIO; | |
898 | } | |
899 | ||
900 | /* Write dummy data, (this is ugly but part of the USB Protocol */ | |
901 | /* if you use endpoint 1 as bulk and not as irq) */ | |
902 | memcpy (mdc800->out, mdc800->camera_response,8); | |
903 | ||
904 | /* This is the interpreted answer */ | |
905 | memcpy (&mdc800->out[8], mdc800->camera_response,8); | |
906 | ||
907 | mdc800->out_ptr=0; | |
908 | mdc800->out_count=16; | |
909 | ||
910 | /* Cache the Imagesize, if command was getImageSize */ | |
911 | if (mdc800->in [1] == (char) 0x07) | |
912 | { | |
913 | mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2]; | |
914 | ||
915 | dbg ("cached imagesize = %i",mdc800->pic_len); | |
916 | } | |
917 | ||
918 | } | |
919 | else | |
920 | { | |
921 | if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND)) | |
922 | { | |
923 | err ("Command Timeout."); | |
924 | up (&mdc800->io_lock); | |
925 | return -EIO; | |
926 | } | |
927 | } | |
928 | mdc800->state=READY; | |
929 | break; | |
930 | } | |
931 | } | |
932 | i++; | |
933 | } | |
934 | up (&mdc800->io_lock); | |
935 | return i; | |
936 | } | |
937 | ||
938 | ||
939 | /*************************************************************************** | |
940 | Init and Cleanup this driver (Structs and types) | |
941 | ****************************************************************************/ | |
942 | ||
943 | /* File Operations of this drivers */ | |
944 | static struct file_operations mdc800_device_ops = | |
945 | { | |
946 | .owner = THIS_MODULE, | |
947 | .read = mdc800_device_read, | |
948 | .write = mdc800_device_write, | |
949 | .open = mdc800_device_open, | |
950 | .release = mdc800_device_release, | |
951 | }; | |
952 | ||
953 | ||
954 | ||
955 | static struct usb_device_id mdc800_table [] = { | |
956 | { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) }, | |
957 | { } /* Terminating entry */ | |
958 | }; | |
959 | ||
960 | MODULE_DEVICE_TABLE (usb, mdc800_table); | |
961 | /* | |
962 | * USB Driver Struct for this device | |
963 | */ | |
964 | static struct usb_driver mdc800_usb_driver = | |
965 | { | |
966 | .owner = THIS_MODULE, | |
967 | .name = "mdc800", | |
968 | .probe = mdc800_usb_probe, | |
969 | .disconnect = mdc800_usb_disconnect, | |
970 | .id_table = mdc800_table | |
971 | }; | |
972 | ||
973 | ||
974 | ||
975 | /************************************************************************ | |
976 | Init and Cleanup this driver (Main Functions) | |
977 | *************************************************************************/ | |
978 | ||
979 | #define try(A) if (!(A)) goto cleanup_on_fail; | |
980 | ||
981 | static int __init usb_mdc800_init (void) | |
982 | { | |
983 | int retval = -ENODEV; | |
984 | /* Allocate Memory */ | |
985 | try (mdc800=kmalloc (sizeof (struct mdc800_data), GFP_KERNEL)); | |
986 | ||
987 | memset(mdc800, 0, sizeof(struct mdc800_data)); | |
988 | mdc800->dev = NULL; | |
989 | mdc800->open=0; | |
990 | mdc800->state=NOT_CONNECTED; | |
991 | init_MUTEX (&mdc800->io_lock); | |
992 | ||
993 | init_waitqueue_head (&mdc800->irq_wait); | |
994 | init_waitqueue_head (&mdc800->write_wait); | |
995 | init_waitqueue_head (&mdc800->download_wait); | |
996 | ||
997 | mdc800->irq_woken = 0; | |
998 | mdc800->downloaded = 0; | |
999 | mdc800->written = 0; | |
1000 | ||
1001 | try (mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL)); | |
1002 | try (mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL)); | |
1003 | try (mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL)); | |
1004 | ||
1005 | try (mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL)); | |
1006 | try (mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL)); | |
1007 | try (mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL)); | |
1008 | ||
1009 | /* Register the driver */ | |
1010 | retval = usb_register(&mdc800_usb_driver); | |
1011 | if (retval) | |
1012 | goto cleanup_on_fail; | |
1013 | ||
1014 | info (DRIVER_VERSION ":" DRIVER_DESC); | |
1015 | ||
1016 | return 0; | |
1017 | ||
1018 | /* Clean driver up, when something fails */ | |
1019 | ||
1020 | cleanup_on_fail: | |
1021 | ||
1022 | if (mdc800 != NULL) | |
1023 | { | |
1024 | err ("can't alloc memory!"); | |
1025 | ||
1026 | kfree(mdc800->download_urb_buffer); | |
1027 | kfree(mdc800->write_urb_buffer); | |
1028 | kfree(mdc800->irq_urb_buffer); | |
1029 | ||
1030 | usb_free_urb(mdc800->write_urb); | |
1031 | usb_free_urb(mdc800->download_urb); | |
1032 | usb_free_urb(mdc800->irq_urb); | |
1033 | ||
1034 | kfree (mdc800); | |
1035 | } | |
1036 | mdc800 = NULL; | |
1037 | return retval; | |
1038 | } | |
1039 | ||
1040 | ||
1041 | static void __exit usb_mdc800_cleanup (void) | |
1042 | { | |
1043 | usb_deregister (&mdc800_usb_driver); | |
1044 | ||
1045 | usb_free_urb (mdc800->irq_urb); | |
1046 | usb_free_urb (mdc800->download_urb); | |
1047 | usb_free_urb (mdc800->write_urb); | |
1048 | ||
1049 | kfree (mdc800->irq_urb_buffer); | |
1050 | kfree (mdc800->write_urb_buffer); | |
1051 | kfree (mdc800->download_urb_buffer); | |
1052 | ||
1053 | kfree (mdc800); | |
1054 | mdc800 = NULL; | |
1055 | } | |
1056 | ||
1057 | module_init (usb_mdc800_init); | |
1058 | module_exit (usb_mdc800_cleanup); | |
1059 | ||
1060 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1061 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1062 | MODULE_LICENSE("GPL"); | |
1063 |