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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 | ||
9751afbb NMG |
350 | wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken, |
351 | msecs_to_jiffies(msec)); | |
1da177e4 LT |
352 | mdc800->irq_woken = 0; |
353 | ||
354 | if (mdc800->camera_request_ready>0) | |
355 | { | |
356 | mdc800->camera_request_ready=0; | |
802f389a | 357 | dev_err(&mdc800->dev->dev, "timeout waiting for camera.\n"); |
1da177e4 LT |
358 | return -1; |
359 | } | |
360 | ||
361 | if (mdc800->state == NOT_CONNECTED) | |
362 | { | |
3b6004f3 GKH |
363 | printk(KERN_WARNING "mdc800: Camera gets disconnected " |
364 | "during waiting for irq.\n"); | |
1da177e4 LT |
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 | 381 | if (status != 0) |
802f389a GKH |
382 | dev_err(&mdc800->dev->dev, |
383 | "writing command fails (status=%i)\n", status); | |
1da177e4 | 384 | else |
1da177e4 | 385 | mdc800->state=READY; |
1da177e4 LT |
386 | mdc800->written = 1; |
387 | wake_up (&mdc800->write_wait); | |
388 | } | |
389 | ||
390 | ||
391 | /* | |
392 | * The download_urb callback function | |
393 | */ | |
7d12e780 | 394 | static void mdc800_usb_download_notify (struct urb *urb) |
1da177e4 LT |
395 | { |
396 | struct mdc800_data* mdc800=urb->context; | |
dd6fa4d7 | 397 | int status = urb->status; |
1da177e4 | 398 | |
dd6fa4d7 | 399 | if (status == 0) { |
1da177e4 LT |
400 | /* Fill output buffer with these data */ |
401 | memcpy (mdc800->out, urb->transfer_buffer, 64); | |
402 | mdc800->out_count=64; | |
403 | mdc800->out_ptr=0; | |
404 | mdc800->download_left-=64; | |
405 | if (mdc800->download_left == 0) | |
406 | { | |
407 | mdc800->state=READY; | |
408 | } | |
dd6fa4d7 | 409 | } else { |
802f389a GKH |
410 | dev_err(&mdc800->dev->dev, |
411 | "request bytes fails (status:%i)\n", status); | |
1da177e4 LT |
412 | } |
413 | mdc800->downloaded = 1; | |
414 | wake_up (&mdc800->download_wait); | |
415 | } | |
416 | ||
417 | ||
418 | /*************************************************************************** | |
419 | Probing for the Camera | |
420 | ***************************************************************************/ | |
421 | ||
422 | static struct usb_driver mdc800_usb_driver; | |
066202dd | 423 | static const struct file_operations mdc800_device_ops; |
1da177e4 | 424 | static struct usb_class_driver mdc800_class = { |
d6e5bcf4 | 425 | .name = "mdc800%d", |
1da177e4 | 426 | .fops = &mdc800_device_ops, |
1da177e4 LT |
427 | .minor_base = MDC800_DEVICE_MINOR_BASE, |
428 | }; | |
429 | ||
430 | ||
431 | /* | |
432 | * Callback to search the Mustek MDC800 on the USB Bus | |
433 | */ | |
434 | static int mdc800_usb_probe (struct usb_interface *intf, | |
435 | const struct usb_device_id *id) | |
436 | { | |
437 | int i,j; | |
438 | struct usb_host_interface *intf_desc; | |
439 | struct usb_device *dev = interface_to_usbdev (intf); | |
440 | int irq_interval=0; | |
441 | int retval; | |
442 | ||
1b6d8232 | 443 | dev_dbg(&intf->dev, "(%s) called.\n", __func__); |
1da177e4 LT |
444 | |
445 | ||
446 | if (mdc800->dev != NULL) | |
447 | { | |
3b6004f3 | 448 | dev_warn(&intf->dev, "only one Mustek MDC800 is supported.\n"); |
1da177e4 LT |
449 | return -ENODEV; |
450 | } | |
451 | ||
452 | if (dev->descriptor.bNumConfigurations != 1) | |
453 | { | |
802f389a GKH |
454 | dev_err(&intf->dev, |
455 | "probe fails -> wrong Number of Configuration\n"); | |
1da177e4 LT |
456 | return -ENODEV; |
457 | } | |
458 | intf_desc = intf->cur_altsetting; | |
459 | ||
460 | if ( | |
461 | ( intf_desc->desc.bInterfaceClass != 0xff ) | |
462 | || ( intf_desc->desc.bInterfaceSubClass != 0 ) | |
463 | || ( intf_desc->desc.bInterfaceProtocol != 0 ) | |
464 | || ( intf_desc->desc.bNumEndpoints != 4) | |
465 | ) | |
466 | { | |
802f389a | 467 | dev_err(&intf->dev, "probe fails -> wrong Interface\n"); |
1da177e4 LT |
468 | return -ENODEV; |
469 | } | |
470 | ||
471 | /* Check the Endpoints */ | |
472 | for (i=0; i<4; i++) | |
473 | { | |
474 | mdc800->endpoint[i]=-1; | |
475 | for (j=0; j<4; j++) | |
476 | { | |
477 | if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i])) | |
478 | { | |
479 | mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ; | |
480 | if (i==1) | |
481 | { | |
482 | irq_interval=intf_desc->endpoint [j].desc.bInterval; | |
483 | } | |
1da177e4 LT |
484 | } |
485 | } | |
486 | if (mdc800->endpoint[i] == -1) | |
487 | { | |
802f389a | 488 | dev_err(&intf->dev, "probe fails -> Wrong Endpoints.\n"); |
1da177e4 LT |
489 | return -ENODEV; |
490 | } | |
491 | } | |
492 | ||
493 | ||
5909f6ea | 494 | dev_info(&intf->dev, "Found Mustek MDC800 on USB.\n"); |
1da177e4 | 495 | |
4186ecf8 | 496 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
497 | |
498 | retval = usb_register_dev(intf, &mdc800_class); | |
499 | if (retval) { | |
802f389a | 500 | dev_err(&intf->dev, "Not able to get a minor for this device.\n"); |
909b6c3f | 501 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
502 | return -ENODEV; |
503 | } | |
504 | ||
505 | mdc800->dev=dev; | |
506 | mdc800->open=0; | |
507 | ||
508 | /* Setup URB Structs */ | |
509 | usb_fill_int_urb ( | |
510 | mdc800->irq_urb, | |
511 | mdc800->dev, | |
512 | usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]), | |
513 | mdc800->irq_urb_buffer, | |
514 | 8, | |
515 | mdc800_usb_irq, | |
516 | mdc800, | |
517 | irq_interval | |
518 | ); | |
519 | ||
520 | usb_fill_bulk_urb ( | |
521 | mdc800->write_urb, | |
522 | mdc800->dev, | |
523 | usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]), | |
524 | mdc800->write_urb_buffer, | |
525 | 8, | |
526 | mdc800_usb_write_notify, | |
527 | mdc800 | |
528 | ); | |
529 | ||
530 | usb_fill_bulk_urb ( | |
531 | mdc800->download_urb, | |
532 | mdc800->dev, | |
533 | usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]), | |
534 | mdc800->download_urb_buffer, | |
535 | 64, | |
536 | mdc800_usb_download_notify, | |
537 | mdc800 | |
538 | ); | |
539 | ||
540 | mdc800->state=READY; | |
541 | ||
4186ecf8 | 542 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
543 | |
544 | usb_set_intfdata(intf, mdc800); | |
545 | return 0; | |
546 | } | |
547 | ||
548 | ||
549 | /* | |
550 | * Disconnect USB device (maybe the MDC800) | |
551 | */ | |
552 | static void mdc800_usb_disconnect (struct usb_interface *intf) | |
553 | { | |
554 | struct mdc800_data* mdc800 = usb_get_intfdata(intf); | |
555 | ||
1b6d8232 | 556 | dev_dbg(&intf->dev, "(%s) called\n", __func__); |
1da177e4 LT |
557 | |
558 | if (mdc800) { | |
559 | if (mdc800->state == NOT_CONNECTED) | |
560 | return; | |
561 | ||
562 | usb_deregister_dev(intf, &mdc800_class); | |
563 | ||
f38649fe ON |
564 | /* must be under lock to make sure no URB |
565 | is submitted after usb_kill_urb() */ | |
566 | mutex_lock(&mdc800->io_lock); | |
1da177e4 LT |
567 | mdc800->state=NOT_CONNECTED; |
568 | ||
569 | usb_kill_urb(mdc800->irq_urb); | |
570 | usb_kill_urb(mdc800->write_urb); | |
571 | usb_kill_urb(mdc800->download_urb); | |
f38649fe | 572 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
573 | |
574 | mdc800->dev = NULL; | |
575 | usb_set_intfdata(intf, NULL); | |
576 | } | |
5909f6ea | 577 | dev_info(&intf->dev, "Mustek MDC800 disconnected from USB.\n"); |
1da177e4 LT |
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 | ||
4186ecf8 | 624 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
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; | |
dd6fa4d7 GKH |
649 | retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL); |
650 | if (retval) { | |
802f389a GKH |
651 | dev_err(&mdc800->dev->dev, |
652 | "request USB irq fails (submit_retval=%i).\n", retval); | |
1da177e4 LT |
653 | errn = -EIO; |
654 | goto error_out; | |
655 | } | |
656 | ||
657 | mdc800->open=1; | |
1b6d8232 | 658 | dev_dbg(&mdc800->dev->dev, "Mustek MDC800 device opened.\n"); |
1da177e4 LT |
659 | |
660 | error_out: | |
4186ecf8 | 661 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
662 | return errn; |
663 | } | |
664 | ||
665 | ||
666 | /* | |
667 | * Close the Camera and release Memory | |
668 | */ | |
669 | static int mdc800_device_release (struct inode* inode, struct file *file) | |
670 | { | |
671 | int retval=0; | |
1da177e4 | 672 | |
4186ecf8 | 673 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
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 | ||
4186ecf8 | 686 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
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; | |
dd6fa4d7 | 698 | int retval; |
1da177e4 | 699 | |
4186ecf8 | 700 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
701 | if (mdc800->state == NOT_CONNECTED) |
702 | { | |
4186ecf8 | 703 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
704 | return -EBUSY; |
705 | } | |
706 | if (mdc800->state == WORKING) | |
707 | { | |
3b6004f3 GKH |
708 | printk(KERN_WARNING "mdc800: Illegal State \"working\"" |
709 | "reached during read ?!\n"); | |
4186ecf8 | 710 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
711 | return -EBUSY; |
712 | } | |
713 | if (!mdc800->open) | |
714 | { | |
4186ecf8 | 715 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
716 | return -EBUSY; |
717 | } | |
718 | ||
719 | while (left) | |
720 | { | |
721 | if (signal_pending (current)) | |
722 | { | |
4186ecf8 | 723 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
724 | return -EINTR; |
725 | } | |
726 | ||
727 | sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left; | |
728 | ||
729 | if (sts <= 0) | |
730 | { | |
731 | /* Too less Data in buffer */ | |
732 | if (mdc800->state == DOWNLOAD) | |
733 | { | |
734 | mdc800->out_count=0; | |
735 | mdc800->out_ptr=0; | |
736 | ||
737 | /* Download -> Request new bytes */ | |
738 | mdc800->download_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
739 | retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL); |
740 | if (retval) { | |
802f389a GKH |
741 | dev_err(&mdc800->dev->dev, |
742 | "Can't submit download urb " | |
743 | "(retval=%i)\n", retval); | |
4186ecf8 | 744 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
745 | return len-left; |
746 | } | |
9751afbb NMG |
747 | wait_event_timeout(mdc800->download_wait, |
748 | mdc800->downloaded, | |
749 | msecs_to_jiffies(TO_DOWNLOAD_GET_READY)); | |
1da177e4 LT |
750 | mdc800->downloaded = 0; |
751 | if (mdc800->download_urb->status != 0) | |
752 | { | |
802f389a GKH |
753 | dev_err(&mdc800->dev->dev, |
754 | "request download-bytes fails " | |
755 | "(status=%i)\n", | |
756 | mdc800->download_urb->status); | |
4186ecf8 | 757 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
758 | return len-left; |
759 | } | |
760 | } | |
761 | else | |
762 | { | |
763 | /* No more bytes -> that's an error*/ | |
4186ecf8 | 764 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
765 | return -EIO; |
766 | } | |
767 | } | |
768 | else | |
769 | { | |
770 | /* Copy Bytes */ | |
771 | if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr], | |
772 | sts)) { | |
4186ecf8 | 773 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
774 | return -EFAULT; |
775 | } | |
776 | ptr+=sts; | |
777 | left-=sts; | |
778 | mdc800->out_ptr+=sts; | |
779 | } | |
780 | } | |
781 | ||
4186ecf8 | 782 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
783 | return len-left; |
784 | } | |
785 | ||
786 | ||
787 | /* | |
788 | * The Device write callback Function | |
789 | * If a 8Byte Command is received, it will be send to the camera. | |
790 | * After this the driver initiates the request for the answer or | |
791 | * just waits until the camera becomes ready. | |
792 | */ | |
793 | static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos) | |
794 | { | |
795 | size_t i=0; | |
dd6fa4d7 | 796 | int retval; |
1da177e4 | 797 | |
4186ecf8 | 798 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
799 | if (mdc800->state != READY) |
800 | { | |
4186ecf8 | 801 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
802 | return -EBUSY; |
803 | } | |
804 | if (!mdc800->open ) | |
805 | { | |
4186ecf8 | 806 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
807 | return -EBUSY; |
808 | } | |
809 | ||
810 | while (i<len) | |
811 | { | |
812 | unsigned char c; | |
813 | if (signal_pending (current)) | |
814 | { | |
4186ecf8 | 815 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
816 | return -EINTR; |
817 | } | |
818 | ||
819 | if(get_user(c, buf+i)) | |
820 | { | |
4186ecf8 | 821 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
822 | return -EFAULT; |
823 | } | |
824 | ||
825 | /* check for command start */ | |
826 | if (c == 0x55) | |
827 | { | |
828 | mdc800->in_count=0; | |
829 | mdc800->out_count=0; | |
830 | mdc800->out_ptr=0; | |
831 | mdc800->download_left=0; | |
832 | } | |
833 | ||
834 | /* save command byte */ | |
835 | if (mdc800->in_count < 8) | |
836 | { | |
837 | mdc800->in[mdc800->in_count] = c; | |
838 | mdc800->in_count++; | |
839 | } | |
840 | else | |
841 | { | |
4186ecf8 | 842 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
843 | return -EIO; |
844 | } | |
845 | ||
846 | /* Command Buffer full ? -> send it to camera */ | |
847 | if (mdc800->in_count == 8) | |
848 | { | |
849 | int answersize; | |
850 | ||
851 | if (mdc800_usb_waitForIRQ (0,TO_GET_READY)) | |
852 | { | |
802f389a GKH |
853 | dev_err(&mdc800->dev->dev, |
854 | "Camera didn't get ready.\n"); | |
4186ecf8 | 855 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
856 | return -EIO; |
857 | } | |
858 | ||
859 | answersize=mdc800_getAnswerSize (mdc800->in[1]); | |
860 | ||
861 | mdc800->state=WORKING; | |
862 | memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8); | |
863 | mdc800->write_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
864 | retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL); |
865 | if (retval) { | |
802f389a GKH |
866 | dev_err(&mdc800->dev->dev, |
867 | "submitting write urb fails " | |
868 | "(retval=%i)\n", retval); | |
4186ecf8 | 869 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
870 | return -EIO; |
871 | } | |
9751afbb NMG |
872 | wait_event_timeout(mdc800->write_wait, mdc800->written, |
873 | msecs_to_jiffies(TO_WRITE_GET_READY)); | |
1da177e4 LT |
874 | mdc800->written = 0; |
875 | if (mdc800->state == WORKING) | |
876 | { | |
877 | usb_kill_urb(mdc800->write_urb); | |
4186ecf8 | 878 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
879 | return -EIO; |
880 | } | |
881 | ||
882 | switch ((unsigned char) mdc800->in[1]) | |
883 | { | |
884 | case 0x05: /* Download Image */ | |
885 | case 0x3e: /* Take shot in Fine Mode (WCam Mode) */ | |
886 | if (mdc800->pic_len < 0) | |
887 | { | |
802f389a GKH |
888 | dev_err(&mdc800->dev->dev, |
889 | "call 0x07 before " | |
890 | "0x05,0x3e\n"); | |
1da177e4 | 891 | mdc800->state=READY; |
4186ecf8 | 892 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
893 | return -EIO; |
894 | } | |
895 | mdc800->pic_len=-1; | |
896 | ||
897 | case 0x09: /* Download Thumbnail */ | |
898 | mdc800->download_left=answersize+64; | |
899 | mdc800->state=DOWNLOAD; | |
900 | mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY); | |
901 | break; | |
902 | ||
903 | ||
904 | default: | |
905 | if (answersize) | |
906 | { | |
907 | ||
908 | if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ)) | |
909 | { | |
802f389a | 910 | dev_err(&mdc800->dev->dev, "requesting answer from irq fails\n"); |
4186ecf8 | 911 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
912 | return -EIO; |
913 | } | |
914 | ||
915 | /* Write dummy data, (this is ugly but part of the USB Protocol */ | |
916 | /* if you use endpoint 1 as bulk and not as irq) */ | |
917 | memcpy (mdc800->out, mdc800->camera_response,8); | |
918 | ||
919 | /* This is the interpreted answer */ | |
920 | memcpy (&mdc800->out[8], mdc800->camera_response,8); | |
921 | ||
922 | mdc800->out_ptr=0; | |
923 | mdc800->out_count=16; | |
924 | ||
925 | /* Cache the Imagesize, if command was getImageSize */ | |
926 | if (mdc800->in [1] == (char) 0x07) | |
927 | { | |
928 | mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2]; | |
929 | ||
1b6d8232 | 930 | dev_dbg(&mdc800->dev->dev, "cached imagesize = %i\n", mdc800->pic_len); |
1da177e4 LT |
931 | } |
932 | ||
933 | } | |
934 | else | |
935 | { | |
936 | if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND)) | |
937 | { | |
802f389a | 938 | dev_err(&mdc800->dev->dev, "Command Timeout.\n"); |
4186ecf8 | 939 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
940 | return -EIO; |
941 | } | |
942 | } | |
943 | mdc800->state=READY; | |
944 | break; | |
945 | } | |
946 | } | |
947 | i++; | |
948 | } | |
4186ecf8 | 949 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
950 | return i; |
951 | } | |
952 | ||
953 | ||
954 | /*************************************************************************** | |
955 | Init and Cleanup this driver (Structs and types) | |
956 | ****************************************************************************/ | |
957 | ||
958 | /* File Operations of this drivers */ | |
066202dd | 959 | static const struct file_operations mdc800_device_ops = |
1da177e4 LT |
960 | { |
961 | .owner = THIS_MODULE, | |
962 | .read = mdc800_device_read, | |
963 | .write = mdc800_device_write, | |
964 | .open = mdc800_device_open, | |
965 | .release = mdc800_device_release, | |
6038f373 | 966 | .llseek = noop_llseek, |
1da177e4 LT |
967 | }; |
968 | ||
969 | ||
970 | ||
9052127f | 971 | static const struct usb_device_id mdc800_table[] = { |
1da177e4 LT |
972 | { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) }, |
973 | { } /* Terminating entry */ | |
974 | }; | |
975 | ||
976 | MODULE_DEVICE_TABLE (usb, mdc800_table); | |
977 | /* | |
978 | * USB Driver Struct for this device | |
979 | */ | |
980 | static struct usb_driver mdc800_usb_driver = | |
981 | { | |
1da177e4 LT |
982 | .name = "mdc800", |
983 | .probe = mdc800_usb_probe, | |
984 | .disconnect = mdc800_usb_disconnect, | |
985 | .id_table = mdc800_table | |
986 | }; | |
987 | ||
988 | ||
989 | ||
990 | /************************************************************************ | |
991 | Init and Cleanup this driver (Main Functions) | |
992 | *************************************************************************/ | |
993 | ||
1da177e4 LT |
994 | static int __init usb_mdc800_init (void) |
995 | { | |
996 | int retval = -ENODEV; | |
997 | /* Allocate Memory */ | |
9ff87d73 | 998 | mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL); |
72129cd6 AD |
999 | if (!mdc800) |
1000 | goto cleanup_on_fail; | |
1da177e4 | 1001 | |
1da177e4 | 1002 | mdc800->dev = NULL; |
1da177e4 | 1003 | mdc800->state=NOT_CONNECTED; |
4186ecf8 | 1004 | mutex_init (&mdc800->io_lock); |
1da177e4 LT |
1005 | |
1006 | init_waitqueue_head (&mdc800->irq_wait); | |
1007 | init_waitqueue_head (&mdc800->write_wait); | |
1008 | init_waitqueue_head (&mdc800->download_wait); | |
1009 | ||
1010 | mdc800->irq_woken = 0; | |
1011 | mdc800->downloaded = 0; | |
1012 | mdc800->written = 0; | |
1013 | ||
72129cd6 AD |
1014 | mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL); |
1015 | if (!mdc800->irq_urb_buffer) | |
1016 | goto cleanup_on_fail; | |
1017 | mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL); | |
1018 | if (!mdc800->write_urb_buffer) | |
1019 | goto cleanup_on_fail; | |
1020 | mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL); | |
1021 | if (!mdc800->download_urb_buffer) | |
1022 | goto cleanup_on_fail; | |
1023 | ||
1024 | mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1025 | if (!mdc800->irq_urb) | |
1026 | goto cleanup_on_fail; | |
1027 | mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1028 | if (!mdc800->download_urb) | |
1029 | goto cleanup_on_fail; | |
1030 | mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1031 | if (!mdc800->write_urb) | |
1032 | goto cleanup_on_fail; | |
1da177e4 LT |
1033 | |
1034 | /* Register the driver */ | |
1035 | retval = usb_register(&mdc800_usb_driver); | |
1036 | if (retval) | |
1037 | goto cleanup_on_fail; | |
1038 | ||
5909f6ea GKH |
1039 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1040 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1041 | |
1042 | return 0; | |
1043 | ||
1044 | /* Clean driver up, when something fails */ | |
1045 | ||
1046 | cleanup_on_fail: | |
1047 | ||
1048 | if (mdc800 != NULL) | |
1049 | { | |
802f389a | 1050 | printk(KERN_ERR "mdc800: can't alloc memory!\n"); |
1da177e4 LT |
1051 | |
1052 | kfree(mdc800->download_urb_buffer); | |
1053 | kfree(mdc800->write_urb_buffer); | |
1054 | kfree(mdc800->irq_urb_buffer); | |
1055 | ||
1056 | usb_free_urb(mdc800->write_urb); | |
1057 | usb_free_urb(mdc800->download_urb); | |
1058 | usb_free_urb(mdc800->irq_urb); | |
1059 | ||
1060 | kfree (mdc800); | |
1061 | } | |
1062 | mdc800 = NULL; | |
1063 | return retval; | |
1064 | } | |
1065 | ||
1066 | ||
1067 | static void __exit usb_mdc800_cleanup (void) | |
1068 | { | |
1069 | usb_deregister (&mdc800_usb_driver); | |
1070 | ||
1071 | usb_free_urb (mdc800->irq_urb); | |
1072 | usb_free_urb (mdc800->download_urb); | |
1073 | usb_free_urb (mdc800->write_urb); | |
1074 | ||
1075 | kfree (mdc800->irq_urb_buffer); | |
1076 | kfree (mdc800->write_urb_buffer); | |
1077 | kfree (mdc800->download_urb_buffer); | |
1078 | ||
1079 | kfree (mdc800); | |
1080 | mdc800 = NULL; | |
1081 | } | |
1082 | ||
1083 | module_init (usb_mdc800_init); | |
1084 | module_exit (usb_mdc800_cleanup); | |
1085 | ||
1086 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1087 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1088 | MODULE_LICENSE("GPL"); | |
1089 |