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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 LT |
2 | /* |
3 | * copyright (C) 1999/2000 by Henning Zabel <henning@uni-paderborn.de> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2 of the License, or (at your | |
8 | * option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
12 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 | * for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software Foundation, | |
17 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | ||
21 | /* | |
22 | * USB-Kernel Driver for the Mustek MDC800 Digital Camera | |
23 | * (c) 1999/2000 Henning Zabel <henning@uni-paderborn.de> | |
24 | * | |
25 | * | |
26 | * The driver brings the USB functions of the MDC800 to Linux. | |
093cf723 | 27 | * To use the Camera you must support the USB Protocol of the camera |
1da177e4 LT |
28 | * to the Kernel Node. |
29 | * The Driver uses a misc device Node. Create it with : | |
30 | * mknod /dev/mustek c 180 32 | |
31 | * | |
32 | * The driver supports only one camera. | |
33 | * | |
34 | * Fix: mdc800 used sleep_on and slept with io_lock held. | |
35 | * Converted sleep_on to waitqueues with schedule_timeout and made io_lock | |
36 | * a semaphore from a spinlock. | |
37 | * by Oliver Neukum <oliver@neukum.name> | |
38 | * (02/12/2001) | |
39 | * | |
40 | * Identify version on module load. | |
41 | * (08/04/2001) gb | |
42 | * | |
43 | * version 0.7.5 | |
44 | * Fixed potential SMP races with Spinlocks. | |
45 | * Thanks to Oliver Neukum <oliver@neukum.name> who | |
46 | * noticed the race conditions. | |
47 | * (30/10/2000) | |
48 | * | |
49 | * Fixed: Setting urb->dev before submitting urb. | |
50 | * by Greg KH <greg@kroah.com> | |
51 | * (13/10/2000) | |
52 | * | |
53 | * version 0.7.3 | |
54 | * bugfix : The mdc800->state field gets set to READY after the | |
3569843a | 55 | * the disconnect function sets it to NOT_CONNECTED. This makes the |
1da177e4 LT |
56 | * driver running like the camera is connected and causes some |
57 | * hang ups. | |
58 | * | |
59 | * version 0.7.1 | |
60 | * MOD_INC and MOD_DEC are changed in usb_probe to prevent load/unload | |
61 | * problems when compiled as Module. | |
62 | * (04/04/2000) | |
63 | * | |
64 | * The mdc800 driver gets assigned the USB Minor 32-47. The Registration | |
65 | * was updated to use these values. | |
66 | * (26/03/2000) | |
67 | * | |
68 | * The Init und Exit Module Function are updated. | |
69 | * (01/03/2000) | |
70 | * | |
71 | * version 0.7.0 | |
72 | * Rewrite of the driver : The driver now uses URB's. The old stuff | |
73 | * has been removed. | |
74 | * | |
75 | * version 0.6.0 | |
76 | * Rewrite of this driver: The Emulation of the rs232 protocoll | |
77 | * has been removed from the driver. A special executeCommand function | |
78 | * for this driver is included to gphoto. | |
79 | * The driver supports two kind of communication to bulk endpoints. | |
80 | * Either with the dev->bus->ops->bulk... or with callback function. | |
81 | * (09/11/1999) | |
82 | * | |
83 | * version 0.5.0: | |
84 | * first Version that gets a version number. Most of the needed | |
85 | * functions work. | |
86 | * (20/10/1999) | |
87 | */ | |
88 | ||
174cd4b1 | 89 | #include <linux/sched/signal.h> |
1da177e4 LT |
90 | #include <linux/signal.h> |
91 | #include <linux/spinlock.h> | |
92 | #include <linux/errno.h> | |
93 | #include <linux/random.h> | |
94 | #include <linux/poll.h> | |
95 | #include <linux/init.h> | |
96 | #include <linux/slab.h> | |
97 | #include <linux/module.h> | |
1da177e4 | 98 | #include <linux/wait.h> |
4186ecf8 | 99 | #include <linux/mutex.h> |
1da177e4 LT |
100 | |
101 | #include <linux/usb.h> | |
102 | #include <linux/fs.h> | |
103 | ||
104 | /* | |
105 | * Version Information | |
106 | */ | |
107 | #define DRIVER_VERSION "v0.7.5 (30/10/2000)" | |
108 | #define DRIVER_AUTHOR "Henning Zabel <henning@uni-paderborn.de>" | |
109 | #define DRIVER_DESC "USB Driver for Mustek MDC800 Digital Camera" | |
110 | ||
111 | /* Vendor and Product Information */ | |
112 | #define MDC800_VENDOR_ID 0x055f | |
113 | #define MDC800_PRODUCT_ID 0xa800 | |
114 | ||
115 | /* Timeouts (msec) */ | |
116 | #define TO_DOWNLOAD_GET_READY 1500 | |
117 | #define TO_DOWNLOAD_GET_BUSY 1500 | |
118 | #define TO_WRITE_GET_READY 1000 | |
119 | #define TO_DEFAULT_COMMAND 5000 | |
120 | #define TO_READ_FROM_IRQ TO_DEFAULT_COMMAND | |
121 | #define TO_GET_READY TO_DEFAULT_COMMAND | |
122 | ||
123 | /* Minor Number of the device (create with mknod /dev/mustek c 180 32) */ | |
124 | #define MDC800_DEVICE_MINOR_BASE 32 | |
125 | ||
126 | ||
127 | /************************************************************************** | |
128 | Data and structs | |
129 | ***************************************************************************/ | |
130 | ||
131 | ||
132 | typedef enum { | |
133 | NOT_CONNECTED, READY, WORKING, DOWNLOAD | |
134 | } mdc800_state; | |
135 | ||
136 | ||
137 | /* Data for the driver */ | |
138 | struct mdc800_data | |
139 | { | |
140 | struct usb_device * dev; // Device Data | |
141 | mdc800_state state; | |
142 | ||
143 | unsigned int endpoint [4]; | |
144 | ||
145 | struct urb * irq_urb; | |
146 | wait_queue_head_t irq_wait; | |
147 | int irq_woken; | |
148 | char* irq_urb_buffer; | |
149 | ||
150 | int camera_busy; // is camera busy ? | |
151 | int camera_request_ready; // Status to synchronize with irq | |
152 | char camera_response [8]; // last Bytes send after busy | |
153 | ||
154 | struct urb * write_urb; | |
155 | char* write_urb_buffer; | |
156 | wait_queue_head_t write_wait; | |
157 | int written; | |
158 | ||
159 | ||
160 | struct urb * download_urb; | |
161 | char* download_urb_buffer; | |
162 | wait_queue_head_t download_wait; | |
163 | int downloaded; | |
164 | int download_left; // Bytes left to download ? | |
165 | ||
166 | ||
167 | /* Device Data */ | |
168 | char out [64]; // Answer Buffer | |
169 | int out_ptr; // Index to the first not readen byte | |
170 | int out_count; // Bytes in the buffer | |
171 | ||
172 | int open; // Camera device open ? | |
4186ecf8 | 173 | struct mutex io_lock; // IO -lock |
1da177e4 LT |
174 | |
175 | char in [8]; // Command Input Buffer | |
176 | int in_count; | |
177 | ||
178 | int pic_index; // Cache for the Imagesize (-1 for nothing cached ) | |
179 | int pic_len; | |
180 | int minor; | |
181 | }; | |
182 | ||
183 | ||
184 | /* Specification of the Endpoints */ | |
185 | static struct usb_endpoint_descriptor mdc800_ed [4] = | |
186 | { | |
187 | { | |
188 | .bLength = 0, | |
189 | .bDescriptorType = 0, | |
190 | .bEndpointAddress = 0x01, | |
191 | .bmAttributes = 0x02, | |
551509d2 | 192 | .wMaxPacketSize = cpu_to_le16(8), |
1da177e4 LT |
193 | .bInterval = 0, |
194 | .bRefresh = 0, | |
195 | .bSynchAddress = 0, | |
196 | }, | |
197 | { | |
198 | .bLength = 0, | |
199 | .bDescriptorType = 0, | |
200 | .bEndpointAddress = 0x82, | |
201 | .bmAttributes = 0x03, | |
551509d2 | 202 | .wMaxPacketSize = cpu_to_le16(8), |
1da177e4 LT |
203 | .bInterval = 0, |
204 | .bRefresh = 0, | |
205 | .bSynchAddress = 0, | |
206 | }, | |
207 | { | |
208 | .bLength = 0, | |
209 | .bDescriptorType = 0, | |
210 | .bEndpointAddress = 0x03, | |
211 | .bmAttributes = 0x02, | |
551509d2 | 212 | .wMaxPacketSize = cpu_to_le16(64), |
1da177e4 LT |
213 | .bInterval = 0, |
214 | .bRefresh = 0, | |
215 | .bSynchAddress = 0, | |
216 | }, | |
217 | { | |
218 | .bLength = 0, | |
219 | .bDescriptorType = 0, | |
220 | .bEndpointAddress = 0x84, | |
221 | .bmAttributes = 0x02, | |
551509d2 | 222 | .wMaxPacketSize = cpu_to_le16(64), |
1da177e4 LT |
223 | .bInterval = 0, |
224 | .bRefresh = 0, | |
225 | .bSynchAddress = 0, | |
226 | }, | |
227 | }; | |
228 | ||
229 | /* The Variable used by the driver */ | |
230 | static struct mdc800_data* mdc800; | |
231 | ||
232 | ||
233 | /*************************************************************************** | |
234 | The USB Part of the driver | |
235 | ****************************************************************************/ | |
236 | ||
237 | static int mdc800_endpoint_equals (struct usb_endpoint_descriptor *a,struct usb_endpoint_descriptor *b) | |
238 | { | |
239 | return ( | |
240 | ( a->bEndpointAddress == b->bEndpointAddress ) | |
241 | && ( a->bmAttributes == b->bmAttributes ) | |
242 | && ( a->wMaxPacketSize == b->wMaxPacketSize ) | |
243 | ); | |
244 | } | |
245 | ||
246 | ||
247 | /* | |
248 | * Checks whether the camera responds busy | |
249 | */ | |
250 | static int mdc800_isBusy (char* ch) | |
251 | { | |
252 | int i=0; | |
253 | while (i<8) | |
254 | { | |
255 | if (ch [i] != (char)0x99) | |
256 | return 0; | |
257 | i++; | |
258 | } | |
259 | return 1; | |
260 | } | |
261 | ||
262 | ||
263 | /* | |
264 | * Checks whether the Camera is ready | |
265 | */ | |
266 | static int mdc800_isReady (char *ch) | |
267 | { | |
268 | int i=0; | |
269 | while (i<8) | |
270 | { | |
271 | if (ch [i] != (char)0xbb) | |
272 | return 0; | |
273 | i++; | |
274 | } | |
275 | return 1; | |
276 | } | |
277 | ||
278 | ||
279 | ||
280 | /* | |
281 | * USB IRQ Handler for InputLine | |
282 | */ | |
7d12e780 | 283 | static void mdc800_usb_irq (struct urb *urb) |
1da177e4 LT |
284 | { |
285 | int data_received=0, wake_up; | |
286 | unsigned char* b=urb->transfer_buffer; | |
287 | struct mdc800_data* mdc800=urb->context; | |
1b6d8232 | 288 | struct device *dev = &mdc800->dev->dev; |
dd6fa4d7 | 289 | int status = urb->status; |
1da177e4 | 290 | |
dd6fa4d7 | 291 | if (status >= 0) { |
1da177e4 LT |
292 | if (mdc800_isBusy (b)) |
293 | { | |
294 | if (!mdc800->camera_busy) | |
295 | { | |
296 | mdc800->camera_busy=1; | |
1b6d8232 | 297 | dev_dbg(dev, "gets busy\n"); |
1da177e4 LT |
298 | } |
299 | } | |
300 | else | |
301 | { | |
302 | if (mdc800->camera_busy && mdc800_isReady (b)) | |
303 | { | |
304 | mdc800->camera_busy=0; | |
1b6d8232 | 305 | dev_dbg(dev, "gets ready\n"); |
1da177e4 LT |
306 | } |
307 | } | |
308 | if (!(mdc800_isBusy (b) || mdc800_isReady (b))) | |
309 | { | |
310 | /* Store Data in camera_answer field */ | |
1b6d8232 | 311 | 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 |
312 | |
313 | memcpy (mdc800->camera_response,b,8); | |
314 | data_received=1; | |
315 | } | |
316 | } | |
317 | wake_up= ( mdc800->camera_request_ready > 0 ) | |
318 | && | |
319 | ( | |
320 | ((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy)) | |
321 | || | |
322 | ((mdc800->camera_request_ready == 2) && data_received) | |
323 | || | |
324 | ((mdc800->camera_request_ready == 3) && (mdc800->camera_busy)) | |
325 | || | |
dd6fa4d7 | 326 | (status < 0) |
1da177e4 LT |
327 | ); |
328 | ||
329 | if (wake_up) | |
330 | { | |
331 | mdc800->camera_request_ready=0; | |
332 | mdc800->irq_woken=1; | |
333 | wake_up (&mdc800->irq_wait); | |
334 | } | |
335 | } | |
336 | ||
337 | ||
338 | /* | |
339 | * Waits a while until the irq responds that camera is ready | |
340 | * | |
341 | * mode : 0: Wait for camera gets ready | |
342 | * 1: Wait for receiving data | |
343 | * 2: Wait for camera gets busy | |
344 | * | |
345 | * msec: Time to wait | |
346 | */ | |
347 | static int mdc800_usb_waitForIRQ (int mode, int msec) | |
348 | { | |
349 | mdc800->camera_request_ready=1+mode; | |
350 | ||
9751afbb NMG |
351 | wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken, |
352 | msecs_to_jiffies(msec)); | |
1da177e4 LT |
353 | mdc800->irq_woken = 0; |
354 | ||
355 | if (mdc800->camera_request_ready>0) | |
356 | { | |
357 | mdc800->camera_request_ready=0; | |
802f389a | 358 | dev_err(&mdc800->dev->dev, "timeout waiting for camera.\n"); |
1da177e4 LT |
359 | return -1; |
360 | } | |
361 | ||
362 | if (mdc800->state == NOT_CONNECTED) | |
363 | { | |
3b6004f3 GKH |
364 | printk(KERN_WARNING "mdc800: Camera gets disconnected " |
365 | "during waiting for irq.\n"); | |
1da177e4 LT |
366 | mdc800->camera_request_ready=0; |
367 | return -2; | |
368 | } | |
369 | ||
370 | return 0; | |
371 | } | |
372 | ||
373 | ||
374 | /* | |
375 | * The write_urb callback function | |
376 | */ | |
7d12e780 | 377 | static void mdc800_usb_write_notify (struct urb *urb) |
1da177e4 LT |
378 | { |
379 | struct mdc800_data* mdc800=urb->context; | |
dd6fa4d7 | 380 | int status = urb->status; |
1da177e4 | 381 | |
dd6fa4d7 | 382 | if (status != 0) |
802f389a GKH |
383 | dev_err(&mdc800->dev->dev, |
384 | "writing command fails (status=%i)\n", status); | |
1da177e4 | 385 | else |
1da177e4 | 386 | mdc800->state=READY; |
1da177e4 LT |
387 | mdc800->written = 1; |
388 | wake_up (&mdc800->write_wait); | |
389 | } | |
390 | ||
391 | ||
392 | /* | |
393 | * The download_urb callback function | |
394 | */ | |
7d12e780 | 395 | static void mdc800_usb_download_notify (struct urb *urb) |
1da177e4 LT |
396 | { |
397 | struct mdc800_data* mdc800=urb->context; | |
dd6fa4d7 | 398 | int status = urb->status; |
1da177e4 | 399 | |
dd6fa4d7 | 400 | if (status == 0) { |
1da177e4 LT |
401 | /* Fill output buffer with these data */ |
402 | memcpy (mdc800->out, urb->transfer_buffer, 64); | |
403 | mdc800->out_count=64; | |
404 | mdc800->out_ptr=0; | |
405 | mdc800->download_left-=64; | |
406 | if (mdc800->download_left == 0) | |
407 | { | |
408 | mdc800->state=READY; | |
409 | } | |
dd6fa4d7 | 410 | } else { |
802f389a GKH |
411 | dev_err(&mdc800->dev->dev, |
412 | "request bytes fails (status:%i)\n", status); | |
1da177e4 LT |
413 | } |
414 | mdc800->downloaded = 1; | |
415 | wake_up (&mdc800->download_wait); | |
416 | } | |
417 | ||
418 | ||
419 | /*************************************************************************** | |
420 | Probing for the Camera | |
421 | ***************************************************************************/ | |
422 | ||
423 | static struct usb_driver mdc800_usb_driver; | |
066202dd | 424 | static const struct file_operations mdc800_device_ops; |
1da177e4 | 425 | static struct usb_class_driver mdc800_class = { |
d6e5bcf4 | 426 | .name = "mdc800%d", |
1da177e4 | 427 | .fops = &mdc800_device_ops, |
1da177e4 LT |
428 | .minor_base = MDC800_DEVICE_MINOR_BASE, |
429 | }; | |
430 | ||
431 | ||
432 | /* | |
433 | * Callback to search the Mustek MDC800 on the USB Bus | |
434 | */ | |
435 | static int mdc800_usb_probe (struct usb_interface *intf, | |
436 | const struct usb_device_id *id) | |
437 | { | |
438 | int i,j; | |
439 | struct usb_host_interface *intf_desc; | |
440 | struct usb_device *dev = interface_to_usbdev (intf); | |
441 | int irq_interval=0; | |
442 | int retval; | |
443 | ||
1b6d8232 | 444 | dev_dbg(&intf->dev, "(%s) called.\n", __func__); |
1da177e4 LT |
445 | |
446 | ||
447 | if (mdc800->dev != NULL) | |
448 | { | |
3b6004f3 | 449 | dev_warn(&intf->dev, "only one Mustek MDC800 is supported.\n"); |
1da177e4 LT |
450 | return -ENODEV; |
451 | } | |
452 | ||
453 | if (dev->descriptor.bNumConfigurations != 1) | |
454 | { | |
802f389a GKH |
455 | dev_err(&intf->dev, |
456 | "probe fails -> wrong Number of Configuration\n"); | |
1da177e4 LT |
457 | return -ENODEV; |
458 | } | |
459 | intf_desc = intf->cur_altsetting; | |
460 | ||
461 | if ( | |
462 | ( intf_desc->desc.bInterfaceClass != 0xff ) | |
463 | || ( intf_desc->desc.bInterfaceSubClass != 0 ) | |
464 | || ( intf_desc->desc.bInterfaceProtocol != 0 ) | |
465 | || ( intf_desc->desc.bNumEndpoints != 4) | |
466 | ) | |
467 | { | |
802f389a | 468 | dev_err(&intf->dev, "probe fails -> wrong Interface\n"); |
1da177e4 LT |
469 | return -ENODEV; |
470 | } | |
471 | ||
472 | /* Check the Endpoints */ | |
473 | for (i=0; i<4; i++) | |
474 | { | |
475 | mdc800->endpoint[i]=-1; | |
476 | for (j=0; j<4; j++) | |
477 | { | |
478 | if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i])) | |
479 | { | |
480 | mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ; | |
481 | if (i==1) | |
482 | { | |
483 | irq_interval=intf_desc->endpoint [j].desc.bInterval; | |
484 | } | |
1da177e4 LT |
485 | } |
486 | } | |
487 | if (mdc800->endpoint[i] == -1) | |
488 | { | |
802f389a | 489 | dev_err(&intf->dev, "probe fails -> Wrong Endpoints.\n"); |
1da177e4 LT |
490 | return -ENODEV; |
491 | } | |
492 | } | |
493 | ||
494 | ||
5909f6ea | 495 | dev_info(&intf->dev, "Found Mustek MDC800 on USB.\n"); |
1da177e4 | 496 | |
4186ecf8 | 497 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
498 | |
499 | retval = usb_register_dev(intf, &mdc800_class); | |
500 | if (retval) { | |
802f389a | 501 | dev_err(&intf->dev, "Not able to get a minor for this device.\n"); |
909b6c3f | 502 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
503 | return -ENODEV; |
504 | } | |
505 | ||
506 | mdc800->dev=dev; | |
507 | mdc800->open=0; | |
508 | ||
509 | /* Setup URB Structs */ | |
510 | usb_fill_int_urb ( | |
511 | mdc800->irq_urb, | |
512 | mdc800->dev, | |
513 | usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]), | |
514 | mdc800->irq_urb_buffer, | |
515 | 8, | |
516 | mdc800_usb_irq, | |
517 | mdc800, | |
518 | irq_interval | |
519 | ); | |
520 | ||
521 | usb_fill_bulk_urb ( | |
522 | mdc800->write_urb, | |
523 | mdc800->dev, | |
524 | usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]), | |
525 | mdc800->write_urb_buffer, | |
526 | 8, | |
527 | mdc800_usb_write_notify, | |
528 | mdc800 | |
529 | ); | |
530 | ||
531 | usb_fill_bulk_urb ( | |
532 | mdc800->download_urb, | |
533 | mdc800->dev, | |
534 | usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]), | |
535 | mdc800->download_urb_buffer, | |
536 | 64, | |
537 | mdc800_usb_download_notify, | |
538 | mdc800 | |
539 | ); | |
540 | ||
541 | mdc800->state=READY; | |
542 | ||
4186ecf8 | 543 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
544 | |
545 | usb_set_intfdata(intf, mdc800); | |
546 | return 0; | |
547 | } | |
548 | ||
549 | ||
550 | /* | |
551 | * Disconnect USB device (maybe the MDC800) | |
552 | */ | |
553 | static void mdc800_usb_disconnect (struct usb_interface *intf) | |
554 | { | |
555 | struct mdc800_data* mdc800 = usb_get_intfdata(intf); | |
556 | ||
1b6d8232 | 557 | dev_dbg(&intf->dev, "(%s) called\n", __func__); |
1da177e4 LT |
558 | |
559 | if (mdc800) { | |
560 | if (mdc800->state == NOT_CONNECTED) | |
561 | return; | |
562 | ||
563 | usb_deregister_dev(intf, &mdc800_class); | |
564 | ||
f38649fe ON |
565 | /* must be under lock to make sure no URB |
566 | is submitted after usb_kill_urb() */ | |
567 | mutex_lock(&mdc800->io_lock); | |
1da177e4 LT |
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); | |
f38649fe | 573 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
574 | |
575 | mdc800->dev = NULL; | |
576 | usb_set_intfdata(intf, NULL); | |
577 | } | |
5909f6ea | 578 | dev_info(&intf->dev, "Mustek MDC800 disconnected from USB.\n"); |
1da177e4 LT |
579 | } |
580 | ||
581 | ||
582 | /*************************************************************************** | |
583 | The Misc device Part (file_operations) | |
584 | ****************************************************************************/ | |
585 | ||
586 | /* | |
587 | * This Function calc the Answersize for a command. | |
588 | */ | |
589 | static int mdc800_getAnswerSize (char command) | |
590 | { | |
591 | switch ((unsigned char) command) | |
592 | { | |
593 | case 0x2a: | |
594 | case 0x49: | |
595 | case 0x51: | |
596 | case 0x0d: | |
597 | case 0x20: | |
598 | case 0x07: | |
599 | case 0x01: | |
600 | case 0x25: | |
601 | case 0x00: | |
602 | return 8; | |
603 | ||
604 | case 0x05: | |
605 | case 0x3e: | |
606 | return mdc800->pic_len; | |
607 | ||
608 | case 0x09: | |
609 | return 4096; | |
610 | ||
611 | default: | |
612 | return 0; | |
613 | } | |
614 | } | |
615 | ||
616 | ||
617 | /* | |
618 | * Init the device: (1) alloc mem (2) Increase MOD Count .. | |
619 | */ | |
620 | static int mdc800_device_open (struct inode* inode, struct file *file) | |
621 | { | |
622 | int retval=0; | |
623 | int errn=0; | |
624 | ||
4186ecf8 | 625 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
626 | |
627 | if (mdc800->state == NOT_CONNECTED) | |
628 | { | |
629 | errn=-EBUSY; | |
630 | goto error_out; | |
631 | } | |
632 | if (mdc800->open) | |
633 | { | |
634 | errn=-EBUSY; | |
635 | goto error_out; | |
636 | } | |
637 | ||
638 | mdc800->in_count=0; | |
639 | mdc800->out_count=0; | |
640 | mdc800->out_ptr=0; | |
641 | mdc800->pic_index=0; | |
642 | mdc800->pic_len=-1; | |
643 | mdc800->download_left=0; | |
644 | ||
645 | mdc800->camera_busy=0; | |
646 | mdc800->camera_request_ready=0; | |
647 | ||
648 | retval=0; | |
649 | mdc800->irq_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
650 | retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL); |
651 | if (retval) { | |
802f389a GKH |
652 | dev_err(&mdc800->dev->dev, |
653 | "request USB irq fails (submit_retval=%i).\n", retval); | |
1da177e4 LT |
654 | errn = -EIO; |
655 | goto error_out; | |
656 | } | |
657 | ||
658 | mdc800->open=1; | |
1b6d8232 | 659 | dev_dbg(&mdc800->dev->dev, "Mustek MDC800 device opened.\n"); |
1da177e4 LT |
660 | |
661 | error_out: | |
4186ecf8 | 662 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
663 | return errn; |
664 | } | |
665 | ||
666 | ||
667 | /* | |
668 | * Close the Camera and release Memory | |
669 | */ | |
670 | static int mdc800_device_release (struct inode* inode, struct file *file) | |
671 | { | |
672 | int retval=0; | |
1da177e4 | 673 | |
4186ecf8 | 674 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
675 | if (mdc800->open && (mdc800->state != NOT_CONNECTED)) |
676 | { | |
677 | usb_kill_urb(mdc800->irq_urb); | |
678 | usb_kill_urb(mdc800->write_urb); | |
679 | usb_kill_urb(mdc800->download_urb); | |
680 | mdc800->open=0; | |
681 | } | |
682 | else | |
683 | { | |
684 | retval=-EIO; | |
685 | } | |
686 | ||
4186ecf8 | 687 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
688 | return retval; |
689 | } | |
690 | ||
691 | ||
692 | /* | |
693 | * The Device read callback Function | |
694 | */ | |
695 | static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos) | |
696 | { | |
697 | size_t left=len, sts=len; /* single transfer size */ | |
698 | char __user *ptr = buf; | |
dd6fa4d7 | 699 | int retval; |
1da177e4 | 700 | |
4186ecf8 | 701 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
702 | if (mdc800->state == NOT_CONNECTED) |
703 | { | |
4186ecf8 | 704 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
705 | return -EBUSY; |
706 | } | |
707 | if (mdc800->state == WORKING) | |
708 | { | |
3b6004f3 GKH |
709 | printk(KERN_WARNING "mdc800: Illegal State \"working\"" |
710 | "reached during read ?!\n"); | |
4186ecf8 | 711 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
712 | return -EBUSY; |
713 | } | |
714 | if (!mdc800->open) | |
715 | { | |
4186ecf8 | 716 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
717 | return -EBUSY; |
718 | } | |
719 | ||
720 | while (left) | |
721 | { | |
722 | if (signal_pending (current)) | |
723 | { | |
4186ecf8 | 724 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
725 | return -EINTR; |
726 | } | |
727 | ||
728 | sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left; | |
729 | ||
730 | if (sts <= 0) | |
731 | { | |
732 | /* Too less Data in buffer */ | |
733 | if (mdc800->state == DOWNLOAD) | |
734 | { | |
735 | mdc800->out_count=0; | |
736 | mdc800->out_ptr=0; | |
737 | ||
738 | /* Download -> Request new bytes */ | |
739 | mdc800->download_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
740 | retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL); |
741 | if (retval) { | |
802f389a GKH |
742 | dev_err(&mdc800->dev->dev, |
743 | "Can't submit download urb " | |
744 | "(retval=%i)\n", retval); | |
4186ecf8 | 745 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
746 | return len-left; |
747 | } | |
9751afbb NMG |
748 | wait_event_timeout(mdc800->download_wait, |
749 | mdc800->downloaded, | |
750 | msecs_to_jiffies(TO_DOWNLOAD_GET_READY)); | |
1da177e4 LT |
751 | mdc800->downloaded = 0; |
752 | if (mdc800->download_urb->status != 0) | |
753 | { | |
802f389a GKH |
754 | dev_err(&mdc800->dev->dev, |
755 | "request download-bytes fails " | |
756 | "(status=%i)\n", | |
757 | mdc800->download_urb->status); | |
4186ecf8 | 758 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
759 | return len-left; |
760 | } | |
761 | } | |
762 | else | |
763 | { | |
764 | /* No more bytes -> that's an error*/ | |
4186ecf8 | 765 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
766 | return -EIO; |
767 | } | |
768 | } | |
769 | else | |
770 | { | |
771 | /* Copy Bytes */ | |
772 | if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr], | |
773 | sts)) { | |
4186ecf8 | 774 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
775 | return -EFAULT; |
776 | } | |
777 | ptr+=sts; | |
778 | left-=sts; | |
779 | mdc800->out_ptr+=sts; | |
780 | } | |
781 | } | |
782 | ||
4186ecf8 | 783 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
784 | return len-left; |
785 | } | |
786 | ||
787 | ||
788 | /* | |
789 | * The Device write callback Function | |
790 | * If a 8Byte Command is received, it will be send to the camera. | |
791 | * After this the driver initiates the request for the answer or | |
792 | * just waits until the camera becomes ready. | |
793 | */ | |
794 | static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos) | |
795 | { | |
796 | size_t i=0; | |
dd6fa4d7 | 797 | int retval; |
1da177e4 | 798 | |
4186ecf8 | 799 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
800 | if (mdc800->state != READY) |
801 | { | |
4186ecf8 | 802 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
803 | return -EBUSY; |
804 | } | |
805 | if (!mdc800->open ) | |
806 | { | |
4186ecf8 | 807 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
808 | return -EBUSY; |
809 | } | |
810 | ||
811 | while (i<len) | |
812 | { | |
813 | unsigned char c; | |
814 | if (signal_pending (current)) | |
815 | { | |
4186ecf8 | 816 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
817 | return -EINTR; |
818 | } | |
819 | ||
820 | if(get_user(c, buf+i)) | |
821 | { | |
4186ecf8 | 822 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
823 | return -EFAULT; |
824 | } | |
825 | ||
826 | /* check for command start */ | |
827 | if (c == 0x55) | |
828 | { | |
829 | mdc800->in_count=0; | |
830 | mdc800->out_count=0; | |
831 | mdc800->out_ptr=0; | |
832 | mdc800->download_left=0; | |
833 | } | |
834 | ||
835 | /* save command byte */ | |
836 | if (mdc800->in_count < 8) | |
837 | { | |
838 | mdc800->in[mdc800->in_count] = c; | |
839 | mdc800->in_count++; | |
840 | } | |
841 | else | |
842 | { | |
4186ecf8 | 843 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
844 | return -EIO; |
845 | } | |
846 | ||
847 | /* Command Buffer full ? -> send it to camera */ | |
848 | if (mdc800->in_count == 8) | |
849 | { | |
850 | int answersize; | |
851 | ||
852 | if (mdc800_usb_waitForIRQ (0,TO_GET_READY)) | |
853 | { | |
802f389a GKH |
854 | dev_err(&mdc800->dev->dev, |
855 | "Camera didn't get ready.\n"); | |
4186ecf8 | 856 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
857 | return -EIO; |
858 | } | |
859 | ||
860 | answersize=mdc800_getAnswerSize (mdc800->in[1]); | |
861 | ||
862 | mdc800->state=WORKING; | |
863 | memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8); | |
864 | mdc800->write_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
865 | retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL); |
866 | if (retval) { | |
802f389a GKH |
867 | dev_err(&mdc800->dev->dev, |
868 | "submitting write urb fails " | |
869 | "(retval=%i)\n", retval); | |
4186ecf8 | 870 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
871 | return -EIO; |
872 | } | |
9751afbb NMG |
873 | wait_event_timeout(mdc800->write_wait, mdc800->written, |
874 | msecs_to_jiffies(TO_WRITE_GET_READY)); | |
1da177e4 LT |
875 | mdc800->written = 0; |
876 | if (mdc800->state == WORKING) | |
877 | { | |
878 | usb_kill_urb(mdc800->write_urb); | |
4186ecf8 | 879 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
880 | return -EIO; |
881 | } | |
882 | ||
883 | switch ((unsigned char) mdc800->in[1]) | |
884 | { | |
885 | case 0x05: /* Download Image */ | |
886 | case 0x3e: /* Take shot in Fine Mode (WCam Mode) */ | |
887 | if (mdc800->pic_len < 0) | |
888 | { | |
802f389a GKH |
889 | dev_err(&mdc800->dev->dev, |
890 | "call 0x07 before " | |
891 | "0x05,0x3e\n"); | |
1da177e4 | 892 | mdc800->state=READY; |
4186ecf8 | 893 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
894 | return -EIO; |
895 | } | |
896 | mdc800->pic_len=-1; | |
f10f4715 | 897 | /* fall through */ |
1da177e4 LT |
898 | |
899 | case 0x09: /* Download Thumbnail */ | |
900 | mdc800->download_left=answersize+64; | |
901 | mdc800->state=DOWNLOAD; | |
902 | mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY); | |
903 | break; | |
904 | ||
905 | ||
906 | default: | |
907 | if (answersize) | |
908 | { | |
909 | ||
910 | if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ)) | |
911 | { | |
802f389a | 912 | dev_err(&mdc800->dev->dev, "requesting answer from irq fails\n"); |
4186ecf8 | 913 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
914 | return -EIO; |
915 | } | |
916 | ||
917 | /* Write dummy data, (this is ugly but part of the USB Protocol */ | |
918 | /* if you use endpoint 1 as bulk and not as irq) */ | |
919 | memcpy (mdc800->out, mdc800->camera_response,8); | |
920 | ||
921 | /* This is the interpreted answer */ | |
922 | memcpy (&mdc800->out[8], mdc800->camera_response,8); | |
923 | ||
924 | mdc800->out_ptr=0; | |
925 | mdc800->out_count=16; | |
926 | ||
927 | /* Cache the Imagesize, if command was getImageSize */ | |
928 | if (mdc800->in [1] == (char) 0x07) | |
929 | { | |
930 | mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2]; | |
931 | ||
1b6d8232 | 932 | dev_dbg(&mdc800->dev->dev, "cached imagesize = %i\n", mdc800->pic_len); |
1da177e4 LT |
933 | } |
934 | ||
935 | } | |
936 | else | |
937 | { | |
938 | if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND)) | |
939 | { | |
802f389a | 940 | dev_err(&mdc800->dev->dev, "Command Timeout.\n"); |
4186ecf8 | 941 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
942 | return -EIO; |
943 | } | |
944 | } | |
945 | mdc800->state=READY; | |
946 | break; | |
947 | } | |
948 | } | |
949 | i++; | |
950 | } | |
4186ecf8 | 951 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
952 | return i; |
953 | } | |
954 | ||
955 | ||
956 | /*************************************************************************** | |
957 | Init and Cleanup this driver (Structs and types) | |
958 | ****************************************************************************/ | |
959 | ||
960 | /* File Operations of this drivers */ | |
066202dd | 961 | static const struct file_operations mdc800_device_ops = |
1da177e4 LT |
962 | { |
963 | .owner = THIS_MODULE, | |
964 | .read = mdc800_device_read, | |
965 | .write = mdc800_device_write, | |
966 | .open = mdc800_device_open, | |
967 | .release = mdc800_device_release, | |
6038f373 | 968 | .llseek = noop_llseek, |
1da177e4 LT |
969 | }; |
970 | ||
971 | ||
972 | ||
9052127f | 973 | static const struct usb_device_id mdc800_table[] = { |
1da177e4 LT |
974 | { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) }, |
975 | { } /* Terminating entry */ | |
976 | }; | |
977 | ||
978 | MODULE_DEVICE_TABLE (usb, mdc800_table); | |
979 | /* | |
980 | * USB Driver Struct for this device | |
981 | */ | |
982 | static struct usb_driver mdc800_usb_driver = | |
983 | { | |
1da177e4 LT |
984 | .name = "mdc800", |
985 | .probe = mdc800_usb_probe, | |
986 | .disconnect = mdc800_usb_disconnect, | |
987 | .id_table = mdc800_table | |
988 | }; | |
989 | ||
990 | ||
991 | ||
992 | /************************************************************************ | |
993 | Init and Cleanup this driver (Main Functions) | |
994 | *************************************************************************/ | |
995 | ||
1da177e4 LT |
996 | static int __init usb_mdc800_init (void) |
997 | { | |
998 | int retval = -ENODEV; | |
999 | /* Allocate Memory */ | |
9ff87d73 | 1000 | mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL); |
72129cd6 AD |
1001 | if (!mdc800) |
1002 | goto cleanup_on_fail; | |
1da177e4 | 1003 | |
1da177e4 | 1004 | mdc800->dev = NULL; |
1da177e4 | 1005 | mdc800->state=NOT_CONNECTED; |
4186ecf8 | 1006 | mutex_init (&mdc800->io_lock); |
1da177e4 LT |
1007 | |
1008 | init_waitqueue_head (&mdc800->irq_wait); | |
1009 | init_waitqueue_head (&mdc800->write_wait); | |
1010 | init_waitqueue_head (&mdc800->download_wait); | |
1011 | ||
1012 | mdc800->irq_woken = 0; | |
1013 | mdc800->downloaded = 0; | |
1014 | mdc800->written = 0; | |
1015 | ||
72129cd6 AD |
1016 | mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL); |
1017 | if (!mdc800->irq_urb_buffer) | |
1018 | goto cleanup_on_fail; | |
1019 | mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL); | |
1020 | if (!mdc800->write_urb_buffer) | |
1021 | goto cleanup_on_fail; | |
1022 | mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL); | |
1023 | if (!mdc800->download_urb_buffer) | |
1024 | goto cleanup_on_fail; | |
1025 | ||
1026 | mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1027 | if (!mdc800->irq_urb) | |
1028 | goto cleanup_on_fail; | |
1029 | mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1030 | if (!mdc800->download_urb) | |
1031 | goto cleanup_on_fail; | |
1032 | mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1033 | if (!mdc800->write_urb) | |
1034 | goto cleanup_on_fail; | |
1da177e4 LT |
1035 | |
1036 | /* Register the driver */ | |
1037 | retval = usb_register(&mdc800_usb_driver); | |
1038 | if (retval) | |
1039 | goto cleanup_on_fail; | |
1040 | ||
5909f6ea GKH |
1041 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1042 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1043 | |
1044 | return 0; | |
1045 | ||
1046 | /* Clean driver up, when something fails */ | |
1047 | ||
1048 | cleanup_on_fail: | |
1049 | ||
1050 | if (mdc800 != NULL) | |
1051 | { | |
802f389a | 1052 | printk(KERN_ERR "mdc800: can't alloc memory!\n"); |
1da177e4 LT |
1053 | |
1054 | kfree(mdc800->download_urb_buffer); | |
1055 | kfree(mdc800->write_urb_buffer); | |
1056 | kfree(mdc800->irq_urb_buffer); | |
1057 | ||
1058 | usb_free_urb(mdc800->write_urb); | |
1059 | usb_free_urb(mdc800->download_urb); | |
1060 | usb_free_urb(mdc800->irq_urb); | |
1061 | ||
1062 | kfree (mdc800); | |
1063 | } | |
1064 | mdc800 = NULL; | |
1065 | return retval; | |
1066 | } | |
1067 | ||
1068 | ||
1069 | static void __exit usb_mdc800_cleanup (void) | |
1070 | { | |
1071 | usb_deregister (&mdc800_usb_driver); | |
1072 | ||
1073 | usb_free_urb (mdc800->irq_urb); | |
1074 | usb_free_urb (mdc800->download_urb); | |
1075 | usb_free_urb (mdc800->write_urb); | |
1076 | ||
1077 | kfree (mdc800->irq_urb_buffer); | |
1078 | kfree (mdc800->write_urb_buffer); | |
1079 | kfree (mdc800->download_urb_buffer); | |
1080 | ||
1081 | kfree (mdc800); | |
1082 | mdc800 = NULL; | |
1083 | } | |
1084 | ||
1085 | module_init (usb_mdc800_init); | |
1086 | module_exit (usb_mdc800_cleanup); | |
1087 | ||
1088 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1089 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1090 | MODULE_LICENSE("GPL"); | |
1091 |