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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 | |
3569843a | 54 | * the disconnect function sets it to NOT_CONNECTED. This makes the |
1da177e4 LT |
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, | |
551509d2 | 191 | .wMaxPacketSize = cpu_to_le16(8), |
1da177e4 LT |
192 | .bInterval = 0, |
193 | .bRefresh = 0, | |
194 | .bSynchAddress = 0, | |
195 | }, | |
196 | { | |
197 | .bLength = 0, | |
198 | .bDescriptorType = 0, | |
199 | .bEndpointAddress = 0x82, | |
200 | .bmAttributes = 0x03, | |
551509d2 | 201 | .wMaxPacketSize = cpu_to_le16(8), |
1da177e4 LT |
202 | .bInterval = 0, |
203 | .bRefresh = 0, | |
204 | .bSynchAddress = 0, | |
205 | }, | |
206 | { | |
207 | .bLength = 0, | |
208 | .bDescriptorType = 0, | |
209 | .bEndpointAddress = 0x03, | |
210 | .bmAttributes = 0x02, | |
551509d2 | 211 | .wMaxPacketSize = cpu_to_le16(64), |
1da177e4 LT |
212 | .bInterval = 0, |
213 | .bRefresh = 0, | |
214 | .bSynchAddress = 0, | |
215 | }, | |
216 | { | |
217 | .bLength = 0, | |
218 | .bDescriptorType = 0, | |
219 | .bEndpointAddress = 0x84, | |
220 | .bmAttributes = 0x02, | |
551509d2 | 221 | .wMaxPacketSize = cpu_to_le16(64), |
1da177e4 LT |
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; | |
1b6d8232 | 287 | struct device *dev = &mdc800->dev->dev; |
dd6fa4d7 | 288 | int status = urb->status; |
1da177e4 | 289 | |
dd6fa4d7 | 290 | if (status >= 0) { |
1da177e4 LT |
291 | if (mdc800_isBusy (b)) |
292 | { | |
293 | if (!mdc800->camera_busy) | |
294 | { | |
295 | mdc800->camera_busy=1; | |
1b6d8232 | 296 | dev_dbg(dev, "gets busy\n"); |
1da177e4 LT |
297 | } |
298 | } | |
299 | else | |
300 | { | |
301 | if (mdc800->camera_busy && mdc800_isReady (b)) | |
302 | { | |
303 | mdc800->camera_busy=0; | |
1b6d8232 | 304 | dev_dbg(dev, "gets ready\n"); |
1da177e4 LT |
305 | } |
306 | } | |
307 | if (!(mdc800_isBusy (b) || mdc800_isReady (b))) | |
308 | { | |
309 | /* Store Data in camera_answer field */ | |
1b6d8232 | 310 | dev_dbg(dev, "%i %i %i %i %i %i %i %i \n",b[0],b[1],b[2],b[3],b[4],b[5],b[6],b[7]); |
1da177e4 LT |
311 | |
312 | memcpy (mdc800->camera_response,b,8); | |
313 | data_received=1; | |
314 | } | |
315 | } | |
316 | wake_up= ( mdc800->camera_request_ready > 0 ) | |
317 | && | |
318 | ( | |
319 | ((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy)) | |
320 | || | |
321 | ((mdc800->camera_request_ready == 2) && data_received) | |
322 | || | |
323 | ((mdc800->camera_request_ready == 3) && (mdc800->camera_busy)) | |
324 | || | |
dd6fa4d7 | 325 | (status < 0) |
1da177e4 LT |
326 | ); |
327 | ||
328 | if (wake_up) | |
329 | { | |
330 | mdc800->camera_request_ready=0; | |
331 | mdc800->irq_woken=1; | |
332 | wake_up (&mdc800->irq_wait); | |
333 | } | |
334 | } | |
335 | ||
336 | ||
337 | /* | |
338 | * Waits a while until the irq responds that camera is ready | |
339 | * | |
340 | * mode : 0: Wait for camera gets ready | |
341 | * 1: Wait for receiving data | |
342 | * 2: Wait for camera gets busy | |
343 | * | |
344 | * msec: Time to wait | |
345 | */ | |
346 | static int mdc800_usb_waitForIRQ (int mode, int msec) | |
347 | { | |
348 | mdc800->camera_request_ready=1+mode; | |
349 | ||
350 | wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken, msec*HZ/1000); | |
351 | mdc800->irq_woken = 0; | |
352 | ||
353 | if (mdc800->camera_request_ready>0) | |
354 | { | |
355 | mdc800->camera_request_ready=0; | |
802f389a | 356 | dev_err(&mdc800->dev->dev, "timeout waiting for camera.\n"); |
1da177e4 LT |
357 | return -1; |
358 | } | |
359 | ||
360 | if (mdc800->state == NOT_CONNECTED) | |
361 | { | |
3b6004f3 GKH |
362 | printk(KERN_WARNING "mdc800: Camera gets disconnected " |
363 | "during waiting for irq.\n"); | |
1da177e4 LT |
364 | mdc800->camera_request_ready=0; |
365 | return -2; | |
366 | } | |
367 | ||
368 | return 0; | |
369 | } | |
370 | ||
371 | ||
372 | /* | |
373 | * The write_urb callback function | |
374 | */ | |
7d12e780 | 375 | static void mdc800_usb_write_notify (struct urb *urb) |
1da177e4 LT |
376 | { |
377 | struct mdc800_data* mdc800=urb->context; | |
dd6fa4d7 | 378 | int status = urb->status; |
1da177e4 | 379 | |
dd6fa4d7 | 380 | if (status != 0) |
802f389a GKH |
381 | dev_err(&mdc800->dev->dev, |
382 | "writing command fails (status=%i)\n", 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 | 408 | } else { |
802f389a GKH |
409 | dev_err(&mdc800->dev->dev, |
410 | "request bytes fails (status:%i)\n", status); | |
1da177e4 LT |
411 | } |
412 | mdc800->downloaded = 1; | |
413 | wake_up (&mdc800->download_wait); | |
414 | } | |
415 | ||
416 | ||
417 | /*************************************************************************** | |
418 | Probing for the Camera | |
419 | ***************************************************************************/ | |
420 | ||
421 | static struct usb_driver mdc800_usb_driver; | |
066202dd | 422 | static const struct file_operations mdc800_device_ops; |
1da177e4 | 423 | static struct usb_class_driver mdc800_class = { |
d6e5bcf4 | 424 | .name = "mdc800%d", |
1da177e4 | 425 | .fops = &mdc800_device_ops, |
1da177e4 LT |
426 | .minor_base = MDC800_DEVICE_MINOR_BASE, |
427 | }; | |
428 | ||
429 | ||
430 | /* | |
431 | * Callback to search the Mustek MDC800 on the USB Bus | |
432 | */ | |
433 | static int mdc800_usb_probe (struct usb_interface *intf, | |
434 | const struct usb_device_id *id) | |
435 | { | |
436 | int i,j; | |
437 | struct usb_host_interface *intf_desc; | |
438 | struct usb_device *dev = interface_to_usbdev (intf); | |
439 | int irq_interval=0; | |
440 | int retval; | |
441 | ||
1b6d8232 | 442 | dev_dbg(&intf->dev, "(%s) called.\n", __func__); |
1da177e4 LT |
443 | |
444 | ||
445 | if (mdc800->dev != NULL) | |
446 | { | |
3b6004f3 | 447 | dev_warn(&intf->dev, "only one Mustek MDC800 is supported.\n"); |
1da177e4 LT |
448 | return -ENODEV; |
449 | } | |
450 | ||
451 | if (dev->descriptor.bNumConfigurations != 1) | |
452 | { | |
802f389a GKH |
453 | dev_err(&intf->dev, |
454 | "probe fails -> wrong Number of Configuration\n"); | |
1da177e4 LT |
455 | return -ENODEV; |
456 | } | |
457 | intf_desc = intf->cur_altsetting; | |
458 | ||
459 | if ( | |
460 | ( intf_desc->desc.bInterfaceClass != 0xff ) | |
461 | || ( intf_desc->desc.bInterfaceSubClass != 0 ) | |
462 | || ( intf_desc->desc.bInterfaceProtocol != 0 ) | |
463 | || ( intf_desc->desc.bNumEndpoints != 4) | |
464 | ) | |
465 | { | |
802f389a | 466 | dev_err(&intf->dev, "probe fails -> wrong Interface\n"); |
1da177e4 LT |
467 | return -ENODEV; |
468 | } | |
469 | ||
470 | /* Check the Endpoints */ | |
471 | for (i=0; i<4; i++) | |
472 | { | |
473 | mdc800->endpoint[i]=-1; | |
474 | for (j=0; j<4; j++) | |
475 | { | |
476 | if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i])) | |
477 | { | |
478 | mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ; | |
479 | if (i==1) | |
480 | { | |
481 | irq_interval=intf_desc->endpoint [j].desc.bInterval; | |
482 | } | |
1da177e4 LT |
483 | } |
484 | } | |
485 | if (mdc800->endpoint[i] == -1) | |
486 | { | |
802f389a | 487 | dev_err(&intf->dev, "probe fails -> Wrong Endpoints.\n"); |
1da177e4 LT |
488 | return -ENODEV; |
489 | } | |
490 | } | |
491 | ||
492 | ||
5909f6ea | 493 | dev_info(&intf->dev, "Found Mustek MDC800 on USB.\n"); |
1da177e4 | 494 | |
4186ecf8 | 495 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
496 | |
497 | retval = usb_register_dev(intf, &mdc800_class); | |
498 | if (retval) { | |
802f389a | 499 | dev_err(&intf->dev, "Not able to get a minor for this device.\n"); |
909b6c3f | 500 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
501 | return -ENODEV; |
502 | } | |
503 | ||
504 | mdc800->dev=dev; | |
505 | mdc800->open=0; | |
506 | ||
507 | /* Setup URB Structs */ | |
508 | usb_fill_int_urb ( | |
509 | mdc800->irq_urb, | |
510 | mdc800->dev, | |
511 | usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]), | |
512 | mdc800->irq_urb_buffer, | |
513 | 8, | |
514 | mdc800_usb_irq, | |
515 | mdc800, | |
516 | irq_interval | |
517 | ); | |
518 | ||
519 | usb_fill_bulk_urb ( | |
520 | mdc800->write_urb, | |
521 | mdc800->dev, | |
522 | usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]), | |
523 | mdc800->write_urb_buffer, | |
524 | 8, | |
525 | mdc800_usb_write_notify, | |
526 | mdc800 | |
527 | ); | |
528 | ||
529 | usb_fill_bulk_urb ( | |
530 | mdc800->download_urb, | |
531 | mdc800->dev, | |
532 | usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]), | |
533 | mdc800->download_urb_buffer, | |
534 | 64, | |
535 | mdc800_usb_download_notify, | |
536 | mdc800 | |
537 | ); | |
538 | ||
539 | mdc800->state=READY; | |
540 | ||
4186ecf8 | 541 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
542 | |
543 | usb_set_intfdata(intf, mdc800); | |
544 | return 0; | |
545 | } | |
546 | ||
547 | ||
548 | /* | |
549 | * Disconnect USB device (maybe the MDC800) | |
550 | */ | |
551 | static void mdc800_usb_disconnect (struct usb_interface *intf) | |
552 | { | |
553 | struct mdc800_data* mdc800 = usb_get_intfdata(intf); | |
554 | ||
1b6d8232 | 555 | dev_dbg(&intf->dev, "(%s) called\n", __func__); |
1da177e4 LT |
556 | |
557 | if (mdc800) { | |
558 | if (mdc800->state == NOT_CONNECTED) | |
559 | return; | |
560 | ||
561 | usb_deregister_dev(intf, &mdc800_class); | |
562 | ||
f38649fe ON |
563 | /* must be under lock to make sure no URB |
564 | is submitted after usb_kill_urb() */ | |
565 | mutex_lock(&mdc800->io_lock); | |
1da177e4 LT |
566 | mdc800->state=NOT_CONNECTED; |
567 | ||
568 | usb_kill_urb(mdc800->irq_urb); | |
569 | usb_kill_urb(mdc800->write_urb); | |
570 | usb_kill_urb(mdc800->download_urb); | |
f38649fe | 571 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
572 | |
573 | mdc800->dev = NULL; | |
574 | usb_set_intfdata(intf, NULL); | |
575 | } | |
5909f6ea | 576 | dev_info(&intf->dev, "Mustek MDC800 disconnected from USB.\n"); |
1da177e4 LT |
577 | } |
578 | ||
579 | ||
580 | /*************************************************************************** | |
581 | The Misc device Part (file_operations) | |
582 | ****************************************************************************/ | |
583 | ||
584 | /* | |
585 | * This Function calc the Answersize for a command. | |
586 | */ | |
587 | static int mdc800_getAnswerSize (char command) | |
588 | { | |
589 | switch ((unsigned char) command) | |
590 | { | |
591 | case 0x2a: | |
592 | case 0x49: | |
593 | case 0x51: | |
594 | case 0x0d: | |
595 | case 0x20: | |
596 | case 0x07: | |
597 | case 0x01: | |
598 | case 0x25: | |
599 | case 0x00: | |
600 | return 8; | |
601 | ||
602 | case 0x05: | |
603 | case 0x3e: | |
604 | return mdc800->pic_len; | |
605 | ||
606 | case 0x09: | |
607 | return 4096; | |
608 | ||
609 | default: | |
610 | return 0; | |
611 | } | |
612 | } | |
613 | ||
614 | ||
615 | /* | |
616 | * Init the device: (1) alloc mem (2) Increase MOD Count .. | |
617 | */ | |
618 | static int mdc800_device_open (struct inode* inode, struct file *file) | |
619 | { | |
620 | int retval=0; | |
621 | int errn=0; | |
622 | ||
4186ecf8 | 623 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
624 | |
625 | if (mdc800->state == NOT_CONNECTED) | |
626 | { | |
627 | errn=-EBUSY; | |
628 | goto error_out; | |
629 | } | |
630 | if (mdc800->open) | |
631 | { | |
632 | errn=-EBUSY; | |
633 | goto error_out; | |
634 | } | |
635 | ||
636 | mdc800->in_count=0; | |
637 | mdc800->out_count=0; | |
638 | mdc800->out_ptr=0; | |
639 | mdc800->pic_index=0; | |
640 | mdc800->pic_len=-1; | |
641 | mdc800->download_left=0; | |
642 | ||
643 | mdc800->camera_busy=0; | |
644 | mdc800->camera_request_ready=0; | |
645 | ||
646 | retval=0; | |
647 | mdc800->irq_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
648 | retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL); |
649 | if (retval) { | |
802f389a GKH |
650 | dev_err(&mdc800->dev->dev, |
651 | "request USB irq fails (submit_retval=%i).\n", retval); | |
1da177e4 LT |
652 | errn = -EIO; |
653 | goto error_out; | |
654 | } | |
655 | ||
656 | mdc800->open=1; | |
1b6d8232 | 657 | dev_dbg(&mdc800->dev->dev, "Mustek MDC800 device opened.\n"); |
1da177e4 LT |
658 | |
659 | error_out: | |
4186ecf8 | 660 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
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; | |
1da177e4 | 671 | |
4186ecf8 | 672 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
673 | if (mdc800->open && (mdc800->state != NOT_CONNECTED)) |
674 | { | |
675 | usb_kill_urb(mdc800->irq_urb); | |
676 | usb_kill_urb(mdc800->write_urb); | |
677 | usb_kill_urb(mdc800->download_urb); | |
678 | mdc800->open=0; | |
679 | } | |
680 | else | |
681 | { | |
682 | retval=-EIO; | |
683 | } | |
684 | ||
4186ecf8 | 685 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
686 | return retval; |
687 | } | |
688 | ||
689 | ||
690 | /* | |
691 | * The Device read callback Function | |
692 | */ | |
693 | static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos) | |
694 | { | |
695 | size_t left=len, sts=len; /* single transfer size */ | |
696 | char __user *ptr = buf; | |
dd6fa4d7 | 697 | int retval; |
1da177e4 | 698 | |
4186ecf8 | 699 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
700 | if (mdc800->state == NOT_CONNECTED) |
701 | { | |
4186ecf8 | 702 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
703 | return -EBUSY; |
704 | } | |
705 | if (mdc800->state == WORKING) | |
706 | { | |
3b6004f3 GKH |
707 | printk(KERN_WARNING "mdc800: Illegal State \"working\"" |
708 | "reached during read ?!\n"); | |
4186ecf8 | 709 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
710 | return -EBUSY; |
711 | } | |
712 | if (!mdc800->open) | |
713 | { | |
4186ecf8 | 714 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
715 | return -EBUSY; |
716 | } | |
717 | ||
718 | while (left) | |
719 | { | |
720 | if (signal_pending (current)) | |
721 | { | |
4186ecf8 | 722 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
723 | return -EINTR; |
724 | } | |
725 | ||
726 | sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left; | |
727 | ||
728 | if (sts <= 0) | |
729 | { | |
730 | /* Too less Data in buffer */ | |
731 | if (mdc800->state == DOWNLOAD) | |
732 | { | |
733 | mdc800->out_count=0; | |
734 | mdc800->out_ptr=0; | |
735 | ||
736 | /* Download -> Request new bytes */ | |
737 | mdc800->download_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
738 | retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL); |
739 | if (retval) { | |
802f389a GKH |
740 | dev_err(&mdc800->dev->dev, |
741 | "Can't submit download urb " | |
742 | "(retval=%i)\n", retval); | |
4186ecf8 | 743 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
744 | return len-left; |
745 | } | |
746 | wait_event_timeout(mdc800->download_wait, mdc800->downloaded, | |
747 | TO_DOWNLOAD_GET_READY*HZ/1000); | |
748 | mdc800->downloaded = 0; | |
749 | if (mdc800->download_urb->status != 0) | |
750 | { | |
802f389a GKH |
751 | dev_err(&mdc800->dev->dev, |
752 | "request download-bytes fails " | |
753 | "(status=%i)\n", | |
754 | mdc800->download_urb->status); | |
4186ecf8 | 755 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
756 | return len-left; |
757 | } | |
758 | } | |
759 | else | |
760 | { | |
761 | /* No more bytes -> that's an error*/ | |
4186ecf8 | 762 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
763 | return -EIO; |
764 | } | |
765 | } | |
766 | else | |
767 | { | |
768 | /* Copy Bytes */ | |
769 | if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr], | |
770 | sts)) { | |
4186ecf8 | 771 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
772 | return -EFAULT; |
773 | } | |
774 | ptr+=sts; | |
775 | left-=sts; | |
776 | mdc800->out_ptr+=sts; | |
777 | } | |
778 | } | |
779 | ||
4186ecf8 | 780 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
781 | return len-left; |
782 | } | |
783 | ||
784 | ||
785 | /* | |
786 | * The Device write callback Function | |
787 | * If a 8Byte Command is received, it will be send to the camera. | |
788 | * After this the driver initiates the request for the answer or | |
789 | * just waits until the camera becomes ready. | |
790 | */ | |
791 | static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos) | |
792 | { | |
793 | size_t i=0; | |
dd6fa4d7 | 794 | int retval; |
1da177e4 | 795 | |
4186ecf8 | 796 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
797 | if (mdc800->state != READY) |
798 | { | |
4186ecf8 | 799 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
800 | return -EBUSY; |
801 | } | |
802 | if (!mdc800->open ) | |
803 | { | |
4186ecf8 | 804 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
805 | return -EBUSY; |
806 | } | |
807 | ||
808 | while (i<len) | |
809 | { | |
810 | unsigned char c; | |
811 | if (signal_pending (current)) | |
812 | { | |
4186ecf8 | 813 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
814 | return -EINTR; |
815 | } | |
816 | ||
817 | if(get_user(c, buf+i)) | |
818 | { | |
4186ecf8 | 819 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
820 | return -EFAULT; |
821 | } | |
822 | ||
823 | /* check for command start */ | |
824 | if (c == 0x55) | |
825 | { | |
826 | mdc800->in_count=0; | |
827 | mdc800->out_count=0; | |
828 | mdc800->out_ptr=0; | |
829 | mdc800->download_left=0; | |
830 | } | |
831 | ||
832 | /* save command byte */ | |
833 | if (mdc800->in_count < 8) | |
834 | { | |
835 | mdc800->in[mdc800->in_count] = c; | |
836 | mdc800->in_count++; | |
837 | } | |
838 | else | |
839 | { | |
4186ecf8 | 840 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
841 | return -EIO; |
842 | } | |
843 | ||
844 | /* Command Buffer full ? -> send it to camera */ | |
845 | if (mdc800->in_count == 8) | |
846 | { | |
847 | int answersize; | |
848 | ||
849 | if (mdc800_usb_waitForIRQ (0,TO_GET_READY)) | |
850 | { | |
802f389a GKH |
851 | dev_err(&mdc800->dev->dev, |
852 | "Camera didn't get ready.\n"); | |
4186ecf8 | 853 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
854 | return -EIO; |
855 | } | |
856 | ||
857 | answersize=mdc800_getAnswerSize (mdc800->in[1]); | |
858 | ||
859 | mdc800->state=WORKING; | |
860 | memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8); | |
861 | mdc800->write_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
862 | retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL); |
863 | if (retval) { | |
802f389a GKH |
864 | dev_err(&mdc800->dev->dev, |
865 | "submitting write urb fails " | |
866 | "(retval=%i)\n", retval); | |
4186ecf8 | 867 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
868 | return -EIO; |
869 | } | |
870 | wait_event_timeout(mdc800->write_wait, mdc800->written, TO_WRITE_GET_READY*HZ/1000); | |
871 | mdc800->written = 0; | |
872 | if (mdc800->state == WORKING) | |
873 | { | |
874 | usb_kill_urb(mdc800->write_urb); | |
4186ecf8 | 875 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
876 | return -EIO; |
877 | } | |
878 | ||
879 | switch ((unsigned char) mdc800->in[1]) | |
880 | { | |
881 | case 0x05: /* Download Image */ | |
882 | case 0x3e: /* Take shot in Fine Mode (WCam Mode) */ | |
883 | if (mdc800->pic_len < 0) | |
884 | { | |
802f389a GKH |
885 | dev_err(&mdc800->dev->dev, |
886 | "call 0x07 before " | |
887 | "0x05,0x3e\n"); | |
1da177e4 | 888 | mdc800->state=READY; |
4186ecf8 | 889 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
890 | return -EIO; |
891 | } | |
892 | mdc800->pic_len=-1; | |
893 | ||
894 | case 0x09: /* Download Thumbnail */ | |
895 | mdc800->download_left=answersize+64; | |
896 | mdc800->state=DOWNLOAD; | |
897 | mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY); | |
898 | break; | |
899 | ||
900 | ||
901 | default: | |
902 | if (answersize) | |
903 | { | |
904 | ||
905 | if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ)) | |
906 | { | |
802f389a | 907 | dev_err(&mdc800->dev->dev, "requesting answer from irq fails\n"); |
4186ecf8 | 908 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
909 | return -EIO; |
910 | } | |
911 | ||
912 | /* Write dummy data, (this is ugly but part of the USB Protocol */ | |
913 | /* if you use endpoint 1 as bulk and not as irq) */ | |
914 | memcpy (mdc800->out, mdc800->camera_response,8); | |
915 | ||
916 | /* This is the interpreted answer */ | |
917 | memcpy (&mdc800->out[8], mdc800->camera_response,8); | |
918 | ||
919 | mdc800->out_ptr=0; | |
920 | mdc800->out_count=16; | |
921 | ||
922 | /* Cache the Imagesize, if command was getImageSize */ | |
923 | if (mdc800->in [1] == (char) 0x07) | |
924 | { | |
925 | mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2]; | |
926 | ||
1b6d8232 | 927 | dev_dbg(&mdc800->dev->dev, "cached imagesize = %i\n", mdc800->pic_len); |
1da177e4 LT |
928 | } |
929 | ||
930 | } | |
931 | else | |
932 | { | |
933 | if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND)) | |
934 | { | |
802f389a | 935 | dev_err(&mdc800->dev->dev, "Command Timeout.\n"); |
4186ecf8 | 936 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
937 | return -EIO; |
938 | } | |
939 | } | |
940 | mdc800->state=READY; | |
941 | break; | |
942 | } | |
943 | } | |
944 | i++; | |
945 | } | |
4186ecf8 | 946 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
947 | return i; |
948 | } | |
949 | ||
950 | ||
951 | /*************************************************************************** | |
952 | Init and Cleanup this driver (Structs and types) | |
953 | ****************************************************************************/ | |
954 | ||
955 | /* File Operations of this drivers */ | |
066202dd | 956 | static const struct file_operations mdc800_device_ops = |
1da177e4 LT |
957 | { |
958 | .owner = THIS_MODULE, | |
959 | .read = mdc800_device_read, | |
960 | .write = mdc800_device_write, | |
961 | .open = mdc800_device_open, | |
962 | .release = mdc800_device_release, | |
6038f373 | 963 | .llseek = noop_llseek, |
1da177e4 LT |
964 | }; |
965 | ||
966 | ||
967 | ||
9052127f | 968 | static const struct usb_device_id mdc800_table[] = { |
1da177e4 LT |
969 | { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) }, |
970 | { } /* Terminating entry */ | |
971 | }; | |
972 | ||
973 | MODULE_DEVICE_TABLE (usb, mdc800_table); | |
974 | /* | |
975 | * USB Driver Struct for this device | |
976 | */ | |
977 | static struct usb_driver mdc800_usb_driver = | |
978 | { | |
1da177e4 LT |
979 | .name = "mdc800", |
980 | .probe = mdc800_usb_probe, | |
981 | .disconnect = mdc800_usb_disconnect, | |
982 | .id_table = mdc800_table | |
983 | }; | |
984 | ||
985 | ||
986 | ||
987 | /************************************************************************ | |
988 | Init and Cleanup this driver (Main Functions) | |
989 | *************************************************************************/ | |
990 | ||
1da177e4 LT |
991 | static int __init usb_mdc800_init (void) |
992 | { | |
993 | int retval = -ENODEV; | |
994 | /* Allocate Memory */ | |
9ff87d73 | 995 | mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL); |
72129cd6 AD |
996 | if (!mdc800) |
997 | goto cleanup_on_fail; | |
1da177e4 | 998 | |
1da177e4 | 999 | mdc800->dev = NULL; |
1da177e4 | 1000 | mdc800->state=NOT_CONNECTED; |
4186ecf8 | 1001 | mutex_init (&mdc800->io_lock); |
1da177e4 LT |
1002 | |
1003 | init_waitqueue_head (&mdc800->irq_wait); | |
1004 | init_waitqueue_head (&mdc800->write_wait); | |
1005 | init_waitqueue_head (&mdc800->download_wait); | |
1006 | ||
1007 | mdc800->irq_woken = 0; | |
1008 | mdc800->downloaded = 0; | |
1009 | mdc800->written = 0; | |
1010 | ||
72129cd6 AD |
1011 | mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL); |
1012 | if (!mdc800->irq_urb_buffer) | |
1013 | goto cleanup_on_fail; | |
1014 | mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL); | |
1015 | if (!mdc800->write_urb_buffer) | |
1016 | goto cleanup_on_fail; | |
1017 | mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL); | |
1018 | if (!mdc800->download_urb_buffer) | |
1019 | goto cleanup_on_fail; | |
1020 | ||
1021 | mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1022 | if (!mdc800->irq_urb) | |
1023 | goto cleanup_on_fail; | |
1024 | mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1025 | if (!mdc800->download_urb) | |
1026 | goto cleanup_on_fail; | |
1027 | mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1028 | if (!mdc800->write_urb) | |
1029 | goto cleanup_on_fail; | |
1da177e4 LT |
1030 | |
1031 | /* Register the driver */ | |
1032 | retval = usb_register(&mdc800_usb_driver); | |
1033 | if (retval) | |
1034 | goto cleanup_on_fail; | |
1035 | ||
5909f6ea GKH |
1036 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1037 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1038 | |
1039 | return 0; | |
1040 | ||
1041 | /* Clean driver up, when something fails */ | |
1042 | ||
1043 | cleanup_on_fail: | |
1044 | ||
1045 | if (mdc800 != NULL) | |
1046 | { | |
802f389a | 1047 | printk(KERN_ERR "mdc800: can't alloc memory!\n"); |
1da177e4 LT |
1048 | |
1049 | kfree(mdc800->download_urb_buffer); | |
1050 | kfree(mdc800->write_urb_buffer); | |
1051 | kfree(mdc800->irq_urb_buffer); | |
1052 | ||
1053 | usb_free_urb(mdc800->write_urb); | |
1054 | usb_free_urb(mdc800->download_urb); | |
1055 | usb_free_urb(mdc800->irq_urb); | |
1056 | ||
1057 | kfree (mdc800); | |
1058 | } | |
1059 | mdc800 = NULL; | |
1060 | return retval; | |
1061 | } | |
1062 | ||
1063 | ||
1064 | static void __exit usb_mdc800_cleanup (void) | |
1065 | { | |
1066 | usb_deregister (&mdc800_usb_driver); | |
1067 | ||
1068 | usb_free_urb (mdc800->irq_urb); | |
1069 | usb_free_urb (mdc800->download_urb); | |
1070 | usb_free_urb (mdc800->write_urb); | |
1071 | ||
1072 | kfree (mdc800->irq_urb_buffer); | |
1073 | kfree (mdc800->write_urb_buffer); | |
1074 | kfree (mdc800->download_urb_buffer); | |
1075 | ||
1076 | kfree (mdc800); | |
1077 | mdc800 = NULL; | |
1078 | } | |
1079 | ||
1080 | module_init (usb_mdc800_init); | |
1081 | module_exit (usb_mdc800_cleanup); | |
1082 | ||
1083 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1084 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1085 | MODULE_LICENSE("GPL"); | |
1086 |