Commit | Line | Data |
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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> | |
1da177e4 LT |
4 | */ |
5 | ||
6 | ||
7 | /* | |
8 | * USB-Kernel Driver for the Mustek MDC800 Digital Camera | |
9 | * (c) 1999/2000 Henning Zabel <henning@uni-paderborn.de> | |
10 | * | |
11 | * | |
12 | * The driver brings the USB functions of the MDC800 to Linux. | |
093cf723 | 13 | * To use the Camera you must support the USB Protocol of the camera |
1da177e4 LT |
14 | * to the Kernel Node. |
15 | * The Driver uses a misc device Node. Create it with : | |
16 | * mknod /dev/mustek c 180 32 | |
17 | * | |
18 | * The driver supports only one camera. | |
19 | * | |
20 | * Fix: mdc800 used sleep_on and slept with io_lock held. | |
21 | * Converted sleep_on to waitqueues with schedule_timeout and made io_lock | |
22 | * a semaphore from a spinlock. | |
23 | * by Oliver Neukum <oliver@neukum.name> | |
24 | * (02/12/2001) | |
25 | * | |
26 | * Identify version on module load. | |
27 | * (08/04/2001) gb | |
28 | * | |
29 | * version 0.7.5 | |
30 | * Fixed potential SMP races with Spinlocks. | |
31 | * Thanks to Oliver Neukum <oliver@neukum.name> who | |
32 | * noticed the race conditions. | |
33 | * (30/10/2000) | |
34 | * | |
35 | * Fixed: Setting urb->dev before submitting urb. | |
36 | * by Greg KH <greg@kroah.com> | |
37 | * (13/10/2000) | |
38 | * | |
39 | * version 0.7.3 | |
40 | * bugfix : The mdc800->state field gets set to READY after the | |
3569843a | 41 | * the disconnect function sets it to NOT_CONNECTED. This makes the |
1da177e4 LT |
42 | * driver running like the camera is connected and causes some |
43 | * hang ups. | |
44 | * | |
45 | * version 0.7.1 | |
46 | * MOD_INC and MOD_DEC are changed in usb_probe to prevent load/unload | |
47 | * problems when compiled as Module. | |
48 | * (04/04/2000) | |
49 | * | |
50 | * The mdc800 driver gets assigned the USB Minor 32-47. The Registration | |
51 | * was updated to use these values. | |
52 | * (26/03/2000) | |
53 | * | |
54 | * The Init und Exit Module Function are updated. | |
55 | * (01/03/2000) | |
56 | * | |
57 | * version 0.7.0 | |
58 | * Rewrite of the driver : The driver now uses URB's. The old stuff | |
59 | * has been removed. | |
60 | * | |
61 | * version 0.6.0 | |
62 | * Rewrite of this driver: The Emulation of the rs232 protocoll | |
63 | * has been removed from the driver. A special executeCommand function | |
64 | * for this driver is included to gphoto. | |
65 | * The driver supports two kind of communication to bulk endpoints. | |
66 | * Either with the dev->bus->ops->bulk... or with callback function. | |
67 | * (09/11/1999) | |
68 | * | |
69 | * version 0.5.0: | |
70 | * first Version that gets a version number. Most of the needed | |
71 | * functions work. | |
72 | * (20/10/1999) | |
73 | */ | |
74 | ||
174cd4b1 | 75 | #include <linux/sched/signal.h> |
1da177e4 LT |
76 | #include <linux/signal.h> |
77 | #include <linux/spinlock.h> | |
78 | #include <linux/errno.h> | |
79 | #include <linux/random.h> | |
80 | #include <linux/poll.h> | |
81 | #include <linux/init.h> | |
82 | #include <linux/slab.h> | |
83 | #include <linux/module.h> | |
1da177e4 | 84 | #include <linux/wait.h> |
4186ecf8 | 85 | #include <linux/mutex.h> |
1da177e4 LT |
86 | |
87 | #include <linux/usb.h> | |
88 | #include <linux/fs.h> | |
89 | ||
90 | /* | |
91 | * Version Information | |
92 | */ | |
93 | #define DRIVER_VERSION "v0.7.5 (30/10/2000)" | |
94 | #define DRIVER_AUTHOR "Henning Zabel <henning@uni-paderborn.de>" | |
95 | #define DRIVER_DESC "USB Driver for Mustek MDC800 Digital Camera" | |
96 | ||
97 | /* Vendor and Product Information */ | |
98 | #define MDC800_VENDOR_ID 0x055f | |
99 | #define MDC800_PRODUCT_ID 0xa800 | |
100 | ||
101 | /* Timeouts (msec) */ | |
102 | #define TO_DOWNLOAD_GET_READY 1500 | |
103 | #define TO_DOWNLOAD_GET_BUSY 1500 | |
104 | #define TO_WRITE_GET_READY 1000 | |
105 | #define TO_DEFAULT_COMMAND 5000 | |
106 | #define TO_READ_FROM_IRQ TO_DEFAULT_COMMAND | |
107 | #define TO_GET_READY TO_DEFAULT_COMMAND | |
108 | ||
109 | /* Minor Number of the device (create with mknod /dev/mustek c 180 32) */ | |
110 | #define MDC800_DEVICE_MINOR_BASE 32 | |
111 | ||
112 | ||
113 | /************************************************************************** | |
114 | Data and structs | |
115 | ***************************************************************************/ | |
116 | ||
117 | ||
118 | typedef enum { | |
119 | NOT_CONNECTED, READY, WORKING, DOWNLOAD | |
120 | } mdc800_state; | |
121 | ||
122 | ||
123 | /* Data for the driver */ | |
124 | struct mdc800_data | |
125 | { | |
126 | struct usb_device * dev; // Device Data | |
127 | mdc800_state state; | |
128 | ||
129 | unsigned int endpoint [4]; | |
130 | ||
131 | struct urb * irq_urb; | |
132 | wait_queue_head_t irq_wait; | |
133 | int irq_woken; | |
134 | char* irq_urb_buffer; | |
135 | ||
136 | int camera_busy; // is camera busy ? | |
137 | int camera_request_ready; // Status to synchronize with irq | |
138 | char camera_response [8]; // last Bytes send after busy | |
139 | ||
140 | struct urb * write_urb; | |
141 | char* write_urb_buffer; | |
142 | wait_queue_head_t write_wait; | |
143 | int written; | |
144 | ||
145 | ||
146 | struct urb * download_urb; | |
147 | char* download_urb_buffer; | |
148 | wait_queue_head_t download_wait; | |
149 | int downloaded; | |
150 | int download_left; // Bytes left to download ? | |
151 | ||
152 | ||
153 | /* Device Data */ | |
154 | char out [64]; // Answer Buffer | |
155 | int out_ptr; // Index to the first not readen byte | |
156 | int out_count; // Bytes in the buffer | |
157 | ||
158 | int open; // Camera device open ? | |
4186ecf8 | 159 | struct mutex io_lock; // IO -lock |
1da177e4 LT |
160 | |
161 | char in [8]; // Command Input Buffer | |
162 | int in_count; | |
163 | ||
164 | int pic_index; // Cache for the Imagesize (-1 for nothing cached ) | |
165 | int pic_len; | |
166 | int minor; | |
167 | }; | |
168 | ||
169 | ||
170 | /* Specification of the Endpoints */ | |
171 | static struct usb_endpoint_descriptor mdc800_ed [4] = | |
172 | { | |
173 | { | |
174 | .bLength = 0, | |
175 | .bDescriptorType = 0, | |
176 | .bEndpointAddress = 0x01, | |
177 | .bmAttributes = 0x02, | |
551509d2 | 178 | .wMaxPacketSize = cpu_to_le16(8), |
1da177e4 LT |
179 | .bInterval = 0, |
180 | .bRefresh = 0, | |
181 | .bSynchAddress = 0, | |
182 | }, | |
183 | { | |
184 | .bLength = 0, | |
185 | .bDescriptorType = 0, | |
186 | .bEndpointAddress = 0x82, | |
187 | .bmAttributes = 0x03, | |
551509d2 | 188 | .wMaxPacketSize = cpu_to_le16(8), |
1da177e4 LT |
189 | .bInterval = 0, |
190 | .bRefresh = 0, | |
191 | .bSynchAddress = 0, | |
192 | }, | |
193 | { | |
194 | .bLength = 0, | |
195 | .bDescriptorType = 0, | |
196 | .bEndpointAddress = 0x03, | |
197 | .bmAttributes = 0x02, | |
551509d2 | 198 | .wMaxPacketSize = cpu_to_le16(64), |
1da177e4 LT |
199 | .bInterval = 0, |
200 | .bRefresh = 0, | |
201 | .bSynchAddress = 0, | |
202 | }, | |
203 | { | |
204 | .bLength = 0, | |
205 | .bDescriptorType = 0, | |
206 | .bEndpointAddress = 0x84, | |
207 | .bmAttributes = 0x02, | |
551509d2 | 208 | .wMaxPacketSize = cpu_to_le16(64), |
1da177e4 LT |
209 | .bInterval = 0, |
210 | .bRefresh = 0, | |
211 | .bSynchAddress = 0, | |
212 | }, | |
213 | }; | |
214 | ||
215 | /* The Variable used by the driver */ | |
216 | static struct mdc800_data* mdc800; | |
217 | ||
218 | ||
219 | /*************************************************************************** | |
220 | The USB Part of the driver | |
221 | ****************************************************************************/ | |
222 | ||
223 | static int mdc800_endpoint_equals (struct usb_endpoint_descriptor *a,struct usb_endpoint_descriptor *b) | |
224 | { | |
225 | return ( | |
226 | ( a->bEndpointAddress == b->bEndpointAddress ) | |
227 | && ( a->bmAttributes == b->bmAttributes ) | |
228 | && ( a->wMaxPacketSize == b->wMaxPacketSize ) | |
229 | ); | |
230 | } | |
231 | ||
232 | ||
233 | /* | |
234 | * Checks whether the camera responds busy | |
235 | */ | |
236 | static int mdc800_isBusy (char* ch) | |
237 | { | |
238 | int i=0; | |
239 | while (i<8) | |
240 | { | |
241 | if (ch [i] != (char)0x99) | |
242 | return 0; | |
243 | i++; | |
244 | } | |
245 | return 1; | |
246 | } | |
247 | ||
248 | ||
249 | /* | |
250 | * Checks whether the Camera is ready | |
251 | */ | |
252 | static int mdc800_isReady (char *ch) | |
253 | { | |
254 | int i=0; | |
255 | while (i<8) | |
256 | { | |
257 | if (ch [i] != (char)0xbb) | |
258 | return 0; | |
259 | i++; | |
260 | } | |
261 | return 1; | |
262 | } | |
263 | ||
264 | ||
265 | ||
266 | /* | |
267 | * USB IRQ Handler for InputLine | |
268 | */ | |
7d12e780 | 269 | static void mdc800_usb_irq (struct urb *urb) |
1da177e4 LT |
270 | { |
271 | int data_received=0, wake_up; | |
272 | unsigned char* b=urb->transfer_buffer; | |
273 | struct mdc800_data* mdc800=urb->context; | |
1b6d8232 | 274 | struct device *dev = &mdc800->dev->dev; |
dd6fa4d7 | 275 | int status = urb->status; |
1da177e4 | 276 | |
dd6fa4d7 | 277 | if (status >= 0) { |
1da177e4 LT |
278 | if (mdc800_isBusy (b)) |
279 | { | |
280 | if (!mdc800->camera_busy) | |
281 | { | |
282 | mdc800->camera_busy=1; | |
1b6d8232 | 283 | dev_dbg(dev, "gets busy\n"); |
1da177e4 LT |
284 | } |
285 | } | |
286 | else | |
287 | { | |
288 | if (mdc800->camera_busy && mdc800_isReady (b)) | |
289 | { | |
290 | mdc800->camera_busy=0; | |
1b6d8232 | 291 | dev_dbg(dev, "gets ready\n"); |
1da177e4 LT |
292 | } |
293 | } | |
294 | if (!(mdc800_isBusy (b) || mdc800_isReady (b))) | |
295 | { | |
296 | /* Store Data in camera_answer field */ | |
1b6d8232 | 297 | 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 |
298 | |
299 | memcpy (mdc800->camera_response,b,8); | |
300 | data_received=1; | |
301 | } | |
302 | } | |
303 | wake_up= ( mdc800->camera_request_ready > 0 ) | |
304 | && | |
305 | ( | |
306 | ((mdc800->camera_request_ready == 1) && (!mdc800->camera_busy)) | |
307 | || | |
308 | ((mdc800->camera_request_ready == 2) && data_received) | |
309 | || | |
310 | ((mdc800->camera_request_ready == 3) && (mdc800->camera_busy)) | |
311 | || | |
dd6fa4d7 | 312 | (status < 0) |
1da177e4 LT |
313 | ); |
314 | ||
315 | if (wake_up) | |
316 | { | |
317 | mdc800->camera_request_ready=0; | |
318 | mdc800->irq_woken=1; | |
319 | wake_up (&mdc800->irq_wait); | |
320 | } | |
321 | } | |
322 | ||
323 | ||
324 | /* | |
325 | * Waits a while until the irq responds that camera is ready | |
326 | * | |
327 | * mode : 0: Wait for camera gets ready | |
328 | * 1: Wait for receiving data | |
329 | * 2: Wait for camera gets busy | |
330 | * | |
331 | * msec: Time to wait | |
332 | */ | |
333 | static int mdc800_usb_waitForIRQ (int mode, int msec) | |
334 | { | |
335 | mdc800->camera_request_ready=1+mode; | |
336 | ||
9751afbb NMG |
337 | wait_event_timeout(mdc800->irq_wait, mdc800->irq_woken, |
338 | msecs_to_jiffies(msec)); | |
1da177e4 LT |
339 | mdc800->irq_woken = 0; |
340 | ||
341 | if (mdc800->camera_request_ready>0) | |
342 | { | |
343 | mdc800->camera_request_ready=0; | |
802f389a | 344 | dev_err(&mdc800->dev->dev, "timeout waiting for camera.\n"); |
1da177e4 LT |
345 | return -1; |
346 | } | |
347 | ||
348 | if (mdc800->state == NOT_CONNECTED) | |
349 | { | |
3b6004f3 GKH |
350 | printk(KERN_WARNING "mdc800: Camera gets disconnected " |
351 | "during waiting for irq.\n"); | |
1da177e4 LT |
352 | mdc800->camera_request_ready=0; |
353 | return -2; | |
354 | } | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
359 | ||
360 | /* | |
361 | * The write_urb callback function | |
362 | */ | |
7d12e780 | 363 | static void mdc800_usb_write_notify (struct urb *urb) |
1da177e4 LT |
364 | { |
365 | struct mdc800_data* mdc800=urb->context; | |
dd6fa4d7 | 366 | int status = urb->status; |
1da177e4 | 367 | |
dd6fa4d7 | 368 | if (status != 0) |
802f389a GKH |
369 | dev_err(&mdc800->dev->dev, |
370 | "writing command fails (status=%i)\n", status); | |
1da177e4 | 371 | else |
1da177e4 | 372 | mdc800->state=READY; |
1da177e4 LT |
373 | mdc800->written = 1; |
374 | wake_up (&mdc800->write_wait); | |
375 | } | |
376 | ||
377 | ||
378 | /* | |
379 | * The download_urb callback function | |
380 | */ | |
7d12e780 | 381 | static void mdc800_usb_download_notify (struct urb *urb) |
1da177e4 LT |
382 | { |
383 | struct mdc800_data* mdc800=urb->context; | |
dd6fa4d7 | 384 | int status = urb->status; |
1da177e4 | 385 | |
dd6fa4d7 | 386 | if (status == 0) { |
1da177e4 LT |
387 | /* Fill output buffer with these data */ |
388 | memcpy (mdc800->out, urb->transfer_buffer, 64); | |
389 | mdc800->out_count=64; | |
390 | mdc800->out_ptr=0; | |
391 | mdc800->download_left-=64; | |
392 | if (mdc800->download_left == 0) | |
393 | { | |
394 | mdc800->state=READY; | |
395 | } | |
dd6fa4d7 | 396 | } else { |
802f389a GKH |
397 | dev_err(&mdc800->dev->dev, |
398 | "request bytes fails (status:%i)\n", status); | |
1da177e4 LT |
399 | } |
400 | mdc800->downloaded = 1; | |
401 | wake_up (&mdc800->download_wait); | |
402 | } | |
403 | ||
404 | ||
405 | /*************************************************************************** | |
406 | Probing for the Camera | |
407 | ***************************************************************************/ | |
408 | ||
409 | static struct usb_driver mdc800_usb_driver; | |
066202dd | 410 | static const struct file_operations mdc800_device_ops; |
1da177e4 | 411 | static struct usb_class_driver mdc800_class = { |
d6e5bcf4 | 412 | .name = "mdc800%d", |
1da177e4 | 413 | .fops = &mdc800_device_ops, |
1da177e4 LT |
414 | .minor_base = MDC800_DEVICE_MINOR_BASE, |
415 | }; | |
416 | ||
417 | ||
418 | /* | |
419 | * Callback to search the Mustek MDC800 on the USB Bus | |
420 | */ | |
421 | static int mdc800_usb_probe (struct usb_interface *intf, | |
422 | const struct usb_device_id *id) | |
423 | { | |
424 | int i,j; | |
425 | struct usb_host_interface *intf_desc; | |
426 | struct usb_device *dev = interface_to_usbdev (intf); | |
427 | int irq_interval=0; | |
428 | int retval; | |
429 | ||
1b6d8232 | 430 | dev_dbg(&intf->dev, "(%s) called.\n", __func__); |
1da177e4 LT |
431 | |
432 | ||
433 | if (mdc800->dev != NULL) | |
434 | { | |
3b6004f3 | 435 | dev_warn(&intf->dev, "only one Mustek MDC800 is supported.\n"); |
1da177e4 LT |
436 | return -ENODEV; |
437 | } | |
438 | ||
439 | if (dev->descriptor.bNumConfigurations != 1) | |
440 | { | |
802f389a GKH |
441 | dev_err(&intf->dev, |
442 | "probe fails -> wrong Number of Configuration\n"); | |
1da177e4 LT |
443 | return -ENODEV; |
444 | } | |
445 | intf_desc = intf->cur_altsetting; | |
446 | ||
447 | if ( | |
448 | ( intf_desc->desc.bInterfaceClass != 0xff ) | |
449 | || ( intf_desc->desc.bInterfaceSubClass != 0 ) | |
450 | || ( intf_desc->desc.bInterfaceProtocol != 0 ) | |
451 | || ( intf_desc->desc.bNumEndpoints != 4) | |
452 | ) | |
453 | { | |
802f389a | 454 | dev_err(&intf->dev, "probe fails -> wrong Interface\n"); |
1da177e4 LT |
455 | return -ENODEV; |
456 | } | |
457 | ||
458 | /* Check the Endpoints */ | |
459 | for (i=0; i<4; i++) | |
460 | { | |
461 | mdc800->endpoint[i]=-1; | |
462 | for (j=0; j<4; j++) | |
463 | { | |
464 | if (mdc800_endpoint_equals (&intf_desc->endpoint [j].desc,&mdc800_ed [i])) | |
465 | { | |
466 | mdc800->endpoint[i]=intf_desc->endpoint [j].desc.bEndpointAddress ; | |
467 | if (i==1) | |
468 | { | |
469 | irq_interval=intf_desc->endpoint [j].desc.bInterval; | |
470 | } | |
1da177e4 LT |
471 | } |
472 | } | |
473 | if (mdc800->endpoint[i] == -1) | |
474 | { | |
802f389a | 475 | dev_err(&intf->dev, "probe fails -> Wrong Endpoints.\n"); |
1da177e4 LT |
476 | return -ENODEV; |
477 | } | |
478 | } | |
479 | ||
480 | ||
5909f6ea | 481 | dev_info(&intf->dev, "Found Mustek MDC800 on USB.\n"); |
1da177e4 | 482 | |
4186ecf8 | 483 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
484 | |
485 | retval = usb_register_dev(intf, &mdc800_class); | |
486 | if (retval) { | |
802f389a | 487 | dev_err(&intf->dev, "Not able to get a minor for this device.\n"); |
909b6c3f | 488 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
489 | return -ENODEV; |
490 | } | |
491 | ||
492 | mdc800->dev=dev; | |
493 | mdc800->open=0; | |
494 | ||
495 | /* Setup URB Structs */ | |
496 | usb_fill_int_urb ( | |
497 | mdc800->irq_urb, | |
498 | mdc800->dev, | |
499 | usb_rcvintpipe (mdc800->dev,mdc800->endpoint [1]), | |
500 | mdc800->irq_urb_buffer, | |
501 | 8, | |
502 | mdc800_usb_irq, | |
503 | mdc800, | |
504 | irq_interval | |
505 | ); | |
506 | ||
507 | usb_fill_bulk_urb ( | |
508 | mdc800->write_urb, | |
509 | mdc800->dev, | |
510 | usb_sndbulkpipe (mdc800->dev, mdc800->endpoint[0]), | |
511 | mdc800->write_urb_buffer, | |
512 | 8, | |
513 | mdc800_usb_write_notify, | |
514 | mdc800 | |
515 | ); | |
516 | ||
517 | usb_fill_bulk_urb ( | |
518 | mdc800->download_urb, | |
519 | mdc800->dev, | |
520 | usb_rcvbulkpipe (mdc800->dev, mdc800->endpoint [3]), | |
521 | mdc800->download_urb_buffer, | |
522 | 64, | |
523 | mdc800_usb_download_notify, | |
524 | mdc800 | |
525 | ); | |
526 | ||
527 | mdc800->state=READY; | |
528 | ||
4186ecf8 | 529 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
530 | |
531 | usb_set_intfdata(intf, mdc800); | |
532 | return 0; | |
533 | } | |
534 | ||
535 | ||
536 | /* | |
537 | * Disconnect USB device (maybe the MDC800) | |
538 | */ | |
539 | static void mdc800_usb_disconnect (struct usb_interface *intf) | |
540 | { | |
541 | struct mdc800_data* mdc800 = usb_get_intfdata(intf); | |
542 | ||
1b6d8232 | 543 | dev_dbg(&intf->dev, "(%s) called\n", __func__); |
1da177e4 LT |
544 | |
545 | if (mdc800) { | |
546 | if (mdc800->state == NOT_CONNECTED) | |
547 | return; | |
548 | ||
549 | usb_deregister_dev(intf, &mdc800_class); | |
550 | ||
f38649fe ON |
551 | /* must be under lock to make sure no URB |
552 | is submitted after usb_kill_urb() */ | |
553 | mutex_lock(&mdc800->io_lock); | |
1da177e4 LT |
554 | mdc800->state=NOT_CONNECTED; |
555 | ||
556 | usb_kill_urb(mdc800->irq_urb); | |
557 | usb_kill_urb(mdc800->write_urb); | |
558 | usb_kill_urb(mdc800->download_urb); | |
f38649fe | 559 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
560 | |
561 | mdc800->dev = NULL; | |
562 | usb_set_intfdata(intf, NULL); | |
563 | } | |
5909f6ea | 564 | dev_info(&intf->dev, "Mustek MDC800 disconnected from USB.\n"); |
1da177e4 LT |
565 | } |
566 | ||
567 | ||
568 | /*************************************************************************** | |
569 | The Misc device Part (file_operations) | |
570 | ****************************************************************************/ | |
571 | ||
572 | /* | |
573 | * This Function calc the Answersize for a command. | |
574 | */ | |
575 | static int mdc800_getAnswerSize (char command) | |
576 | { | |
577 | switch ((unsigned char) command) | |
578 | { | |
579 | case 0x2a: | |
580 | case 0x49: | |
581 | case 0x51: | |
582 | case 0x0d: | |
583 | case 0x20: | |
584 | case 0x07: | |
585 | case 0x01: | |
586 | case 0x25: | |
587 | case 0x00: | |
588 | return 8; | |
589 | ||
590 | case 0x05: | |
591 | case 0x3e: | |
592 | return mdc800->pic_len; | |
593 | ||
594 | case 0x09: | |
595 | return 4096; | |
596 | ||
597 | default: | |
598 | return 0; | |
599 | } | |
600 | } | |
601 | ||
602 | ||
603 | /* | |
604 | * Init the device: (1) alloc mem (2) Increase MOD Count .. | |
605 | */ | |
606 | static int mdc800_device_open (struct inode* inode, struct file *file) | |
607 | { | |
608 | int retval=0; | |
609 | int errn=0; | |
610 | ||
4186ecf8 | 611 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
612 | |
613 | if (mdc800->state == NOT_CONNECTED) | |
614 | { | |
615 | errn=-EBUSY; | |
616 | goto error_out; | |
617 | } | |
618 | if (mdc800->open) | |
619 | { | |
620 | errn=-EBUSY; | |
621 | goto error_out; | |
622 | } | |
623 | ||
624 | mdc800->in_count=0; | |
625 | mdc800->out_count=0; | |
626 | mdc800->out_ptr=0; | |
627 | mdc800->pic_index=0; | |
628 | mdc800->pic_len=-1; | |
629 | mdc800->download_left=0; | |
630 | ||
631 | mdc800->camera_busy=0; | |
632 | mdc800->camera_request_ready=0; | |
633 | ||
634 | retval=0; | |
635 | mdc800->irq_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
636 | retval = usb_submit_urb (mdc800->irq_urb, GFP_KERNEL); |
637 | if (retval) { | |
802f389a GKH |
638 | dev_err(&mdc800->dev->dev, |
639 | "request USB irq fails (submit_retval=%i).\n", retval); | |
1da177e4 LT |
640 | errn = -EIO; |
641 | goto error_out; | |
642 | } | |
643 | ||
644 | mdc800->open=1; | |
1b6d8232 | 645 | dev_dbg(&mdc800->dev->dev, "Mustek MDC800 device opened.\n"); |
1da177e4 LT |
646 | |
647 | error_out: | |
4186ecf8 | 648 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
649 | return errn; |
650 | } | |
651 | ||
652 | ||
653 | /* | |
654 | * Close the Camera and release Memory | |
655 | */ | |
656 | static int mdc800_device_release (struct inode* inode, struct file *file) | |
657 | { | |
658 | int retval=0; | |
1da177e4 | 659 | |
4186ecf8 | 660 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
661 | if (mdc800->open && (mdc800->state != NOT_CONNECTED)) |
662 | { | |
663 | usb_kill_urb(mdc800->irq_urb); | |
664 | usb_kill_urb(mdc800->write_urb); | |
665 | usb_kill_urb(mdc800->download_urb); | |
666 | mdc800->open=0; | |
667 | } | |
668 | else | |
669 | { | |
670 | retval=-EIO; | |
671 | } | |
672 | ||
4186ecf8 | 673 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
674 | return retval; |
675 | } | |
676 | ||
677 | ||
678 | /* | |
679 | * The Device read callback Function | |
680 | */ | |
681 | static ssize_t mdc800_device_read (struct file *file, char __user *buf, size_t len, loff_t *pos) | |
682 | { | |
683 | size_t left=len, sts=len; /* single transfer size */ | |
684 | char __user *ptr = buf; | |
dd6fa4d7 | 685 | int retval; |
1da177e4 | 686 | |
4186ecf8 | 687 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
688 | if (mdc800->state == NOT_CONNECTED) |
689 | { | |
4186ecf8 | 690 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
691 | return -EBUSY; |
692 | } | |
693 | if (mdc800->state == WORKING) | |
694 | { | |
3b6004f3 GKH |
695 | printk(KERN_WARNING "mdc800: Illegal State \"working\"" |
696 | "reached during read ?!\n"); | |
4186ecf8 | 697 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
698 | return -EBUSY; |
699 | } | |
700 | if (!mdc800->open) | |
701 | { | |
4186ecf8 | 702 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
703 | return -EBUSY; |
704 | } | |
705 | ||
706 | while (left) | |
707 | { | |
708 | if (signal_pending (current)) | |
709 | { | |
4186ecf8 | 710 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
711 | return -EINTR; |
712 | } | |
713 | ||
714 | sts=left > (mdc800->out_count-mdc800->out_ptr)?mdc800->out_count-mdc800->out_ptr:left; | |
715 | ||
716 | if (sts <= 0) | |
717 | { | |
718 | /* Too less Data in buffer */ | |
719 | if (mdc800->state == DOWNLOAD) | |
720 | { | |
721 | mdc800->out_count=0; | |
722 | mdc800->out_ptr=0; | |
723 | ||
724 | /* Download -> Request new bytes */ | |
725 | mdc800->download_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
726 | retval = usb_submit_urb (mdc800->download_urb, GFP_KERNEL); |
727 | if (retval) { | |
802f389a GKH |
728 | dev_err(&mdc800->dev->dev, |
729 | "Can't submit download urb " | |
730 | "(retval=%i)\n", retval); | |
4186ecf8 | 731 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
732 | return len-left; |
733 | } | |
9751afbb NMG |
734 | wait_event_timeout(mdc800->download_wait, |
735 | mdc800->downloaded, | |
736 | msecs_to_jiffies(TO_DOWNLOAD_GET_READY)); | |
1da177e4 LT |
737 | mdc800->downloaded = 0; |
738 | if (mdc800->download_urb->status != 0) | |
739 | { | |
802f389a GKH |
740 | dev_err(&mdc800->dev->dev, |
741 | "request download-bytes fails " | |
742 | "(status=%i)\n", | |
743 | mdc800->download_urb->status); | |
4186ecf8 | 744 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
745 | return len-left; |
746 | } | |
747 | } | |
748 | else | |
749 | { | |
750 | /* No more bytes -> that's an error*/ | |
4186ecf8 | 751 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
752 | return -EIO; |
753 | } | |
754 | } | |
755 | else | |
756 | { | |
757 | /* Copy Bytes */ | |
758 | if (copy_to_user(ptr, &mdc800->out [mdc800->out_ptr], | |
759 | sts)) { | |
4186ecf8 | 760 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
761 | return -EFAULT; |
762 | } | |
763 | ptr+=sts; | |
764 | left-=sts; | |
765 | mdc800->out_ptr+=sts; | |
766 | } | |
767 | } | |
768 | ||
4186ecf8 | 769 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
770 | return len-left; |
771 | } | |
772 | ||
773 | ||
774 | /* | |
775 | * The Device write callback Function | |
776 | * If a 8Byte Command is received, it will be send to the camera. | |
777 | * After this the driver initiates the request for the answer or | |
778 | * just waits until the camera becomes ready. | |
779 | */ | |
780 | static ssize_t mdc800_device_write (struct file *file, const char __user *buf, size_t len, loff_t *pos) | |
781 | { | |
782 | size_t i=0; | |
dd6fa4d7 | 783 | int retval; |
1da177e4 | 784 | |
4186ecf8 | 785 | mutex_lock(&mdc800->io_lock); |
1da177e4 LT |
786 | if (mdc800->state != READY) |
787 | { | |
4186ecf8 | 788 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
789 | return -EBUSY; |
790 | } | |
791 | if (!mdc800->open ) | |
792 | { | |
4186ecf8 | 793 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
794 | return -EBUSY; |
795 | } | |
796 | ||
797 | while (i<len) | |
798 | { | |
799 | unsigned char c; | |
800 | if (signal_pending (current)) | |
801 | { | |
4186ecf8 | 802 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
803 | return -EINTR; |
804 | } | |
805 | ||
806 | if(get_user(c, buf+i)) | |
807 | { | |
4186ecf8 | 808 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
809 | return -EFAULT; |
810 | } | |
811 | ||
812 | /* check for command start */ | |
813 | if (c == 0x55) | |
814 | { | |
815 | mdc800->in_count=0; | |
816 | mdc800->out_count=0; | |
817 | mdc800->out_ptr=0; | |
818 | mdc800->download_left=0; | |
819 | } | |
820 | ||
821 | /* save command byte */ | |
822 | if (mdc800->in_count < 8) | |
823 | { | |
824 | mdc800->in[mdc800->in_count] = c; | |
825 | mdc800->in_count++; | |
826 | } | |
827 | else | |
828 | { | |
4186ecf8 | 829 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
830 | return -EIO; |
831 | } | |
832 | ||
833 | /* Command Buffer full ? -> send it to camera */ | |
834 | if (mdc800->in_count == 8) | |
835 | { | |
836 | int answersize; | |
837 | ||
838 | if (mdc800_usb_waitForIRQ (0,TO_GET_READY)) | |
839 | { | |
802f389a GKH |
840 | dev_err(&mdc800->dev->dev, |
841 | "Camera didn't get ready.\n"); | |
4186ecf8 | 842 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
843 | return -EIO; |
844 | } | |
845 | ||
846 | answersize=mdc800_getAnswerSize (mdc800->in[1]); | |
847 | ||
848 | mdc800->state=WORKING; | |
849 | memcpy (mdc800->write_urb->transfer_buffer, mdc800->in,8); | |
850 | mdc800->write_urb->dev = mdc800->dev; | |
dd6fa4d7 GKH |
851 | retval = usb_submit_urb (mdc800->write_urb, GFP_KERNEL); |
852 | if (retval) { | |
802f389a GKH |
853 | dev_err(&mdc800->dev->dev, |
854 | "submitting write urb fails " | |
855 | "(retval=%i)\n", retval); | |
4186ecf8 | 856 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
857 | return -EIO; |
858 | } | |
9751afbb NMG |
859 | wait_event_timeout(mdc800->write_wait, mdc800->written, |
860 | msecs_to_jiffies(TO_WRITE_GET_READY)); | |
1da177e4 LT |
861 | mdc800->written = 0; |
862 | if (mdc800->state == WORKING) | |
863 | { | |
864 | usb_kill_urb(mdc800->write_urb); | |
4186ecf8 | 865 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
866 | return -EIO; |
867 | } | |
868 | ||
869 | switch ((unsigned char) mdc800->in[1]) | |
870 | { | |
871 | case 0x05: /* Download Image */ | |
872 | case 0x3e: /* Take shot in Fine Mode (WCam Mode) */ | |
873 | if (mdc800->pic_len < 0) | |
874 | { | |
802f389a GKH |
875 | dev_err(&mdc800->dev->dev, |
876 | "call 0x07 before " | |
877 | "0x05,0x3e\n"); | |
1da177e4 | 878 | mdc800->state=READY; |
4186ecf8 | 879 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
880 | return -EIO; |
881 | } | |
882 | mdc800->pic_len=-1; | |
f10f4715 | 883 | /* fall through */ |
1da177e4 LT |
884 | |
885 | case 0x09: /* Download Thumbnail */ | |
886 | mdc800->download_left=answersize+64; | |
887 | mdc800->state=DOWNLOAD; | |
888 | mdc800_usb_waitForIRQ (0,TO_DOWNLOAD_GET_BUSY); | |
889 | break; | |
890 | ||
891 | ||
892 | default: | |
893 | if (answersize) | |
894 | { | |
895 | ||
896 | if (mdc800_usb_waitForIRQ (1,TO_READ_FROM_IRQ)) | |
897 | { | |
802f389a | 898 | dev_err(&mdc800->dev->dev, "requesting answer from irq fails\n"); |
4186ecf8 | 899 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
900 | return -EIO; |
901 | } | |
902 | ||
903 | /* Write dummy data, (this is ugly but part of the USB Protocol */ | |
904 | /* if you use endpoint 1 as bulk and not as irq) */ | |
905 | memcpy (mdc800->out, mdc800->camera_response,8); | |
906 | ||
907 | /* This is the interpreted answer */ | |
908 | memcpy (&mdc800->out[8], mdc800->camera_response,8); | |
909 | ||
910 | mdc800->out_ptr=0; | |
911 | mdc800->out_count=16; | |
912 | ||
913 | /* Cache the Imagesize, if command was getImageSize */ | |
914 | if (mdc800->in [1] == (char) 0x07) | |
915 | { | |
916 | mdc800->pic_len=(int) 65536*(unsigned char) mdc800->camera_response[0]+256*(unsigned char) mdc800->camera_response[1]+(unsigned char) mdc800->camera_response[2]; | |
917 | ||
1b6d8232 | 918 | dev_dbg(&mdc800->dev->dev, "cached imagesize = %i\n", mdc800->pic_len); |
1da177e4 LT |
919 | } |
920 | ||
921 | } | |
922 | else | |
923 | { | |
924 | if (mdc800_usb_waitForIRQ (0,TO_DEFAULT_COMMAND)) | |
925 | { | |
802f389a | 926 | dev_err(&mdc800->dev->dev, "Command Timeout.\n"); |
4186ecf8 | 927 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
928 | return -EIO; |
929 | } | |
930 | } | |
931 | mdc800->state=READY; | |
932 | break; | |
933 | } | |
934 | } | |
935 | i++; | |
936 | } | |
4186ecf8 | 937 | mutex_unlock(&mdc800->io_lock); |
1da177e4 LT |
938 | return i; |
939 | } | |
940 | ||
941 | ||
942 | /*************************************************************************** | |
943 | Init and Cleanup this driver (Structs and types) | |
944 | ****************************************************************************/ | |
945 | ||
946 | /* File Operations of this drivers */ | |
066202dd | 947 | static const struct file_operations mdc800_device_ops = |
1da177e4 LT |
948 | { |
949 | .owner = THIS_MODULE, | |
950 | .read = mdc800_device_read, | |
951 | .write = mdc800_device_write, | |
952 | .open = mdc800_device_open, | |
953 | .release = mdc800_device_release, | |
6038f373 | 954 | .llseek = noop_llseek, |
1da177e4 LT |
955 | }; |
956 | ||
957 | ||
958 | ||
9052127f | 959 | static const struct usb_device_id mdc800_table[] = { |
1da177e4 LT |
960 | { USB_DEVICE(MDC800_VENDOR_ID, MDC800_PRODUCT_ID) }, |
961 | { } /* Terminating entry */ | |
962 | }; | |
963 | ||
964 | MODULE_DEVICE_TABLE (usb, mdc800_table); | |
965 | /* | |
966 | * USB Driver Struct for this device | |
967 | */ | |
968 | static struct usb_driver mdc800_usb_driver = | |
969 | { | |
1da177e4 LT |
970 | .name = "mdc800", |
971 | .probe = mdc800_usb_probe, | |
972 | .disconnect = mdc800_usb_disconnect, | |
973 | .id_table = mdc800_table | |
974 | }; | |
975 | ||
976 | ||
977 | ||
978 | /************************************************************************ | |
979 | Init and Cleanup this driver (Main Functions) | |
980 | *************************************************************************/ | |
981 | ||
1da177e4 LT |
982 | static int __init usb_mdc800_init (void) |
983 | { | |
984 | int retval = -ENODEV; | |
985 | /* Allocate Memory */ | |
9ff87d73 | 986 | mdc800=kzalloc (sizeof (struct mdc800_data), GFP_KERNEL); |
72129cd6 AD |
987 | if (!mdc800) |
988 | goto cleanup_on_fail; | |
1da177e4 | 989 | |
1da177e4 | 990 | mdc800->dev = NULL; |
1da177e4 | 991 | mdc800->state=NOT_CONNECTED; |
4186ecf8 | 992 | mutex_init (&mdc800->io_lock); |
1da177e4 LT |
993 | |
994 | init_waitqueue_head (&mdc800->irq_wait); | |
995 | init_waitqueue_head (&mdc800->write_wait); | |
996 | init_waitqueue_head (&mdc800->download_wait); | |
997 | ||
998 | mdc800->irq_woken = 0; | |
999 | mdc800->downloaded = 0; | |
1000 | mdc800->written = 0; | |
1001 | ||
72129cd6 AD |
1002 | mdc800->irq_urb_buffer=kmalloc (8, GFP_KERNEL); |
1003 | if (!mdc800->irq_urb_buffer) | |
1004 | goto cleanup_on_fail; | |
1005 | mdc800->write_urb_buffer=kmalloc (8, GFP_KERNEL); | |
1006 | if (!mdc800->write_urb_buffer) | |
1007 | goto cleanup_on_fail; | |
1008 | mdc800->download_urb_buffer=kmalloc (64, GFP_KERNEL); | |
1009 | if (!mdc800->download_urb_buffer) | |
1010 | goto cleanup_on_fail; | |
1011 | ||
1012 | mdc800->irq_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1013 | if (!mdc800->irq_urb) | |
1014 | goto cleanup_on_fail; | |
1015 | mdc800->download_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1016 | if (!mdc800->download_urb) | |
1017 | goto cleanup_on_fail; | |
1018 | mdc800->write_urb=usb_alloc_urb (0, GFP_KERNEL); | |
1019 | if (!mdc800->write_urb) | |
1020 | goto cleanup_on_fail; | |
1da177e4 LT |
1021 | |
1022 | /* Register the driver */ | |
1023 | retval = usb_register(&mdc800_usb_driver); | |
1024 | if (retval) | |
1025 | goto cleanup_on_fail; | |
1026 | ||
5909f6ea GKH |
1027 | printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":" |
1028 | DRIVER_DESC "\n"); | |
1da177e4 LT |
1029 | |
1030 | return 0; | |
1031 | ||
1032 | /* Clean driver up, when something fails */ | |
1033 | ||
1034 | cleanup_on_fail: | |
1035 | ||
1036 | if (mdc800 != NULL) | |
1037 | { | |
802f389a | 1038 | printk(KERN_ERR "mdc800: can't alloc memory!\n"); |
1da177e4 LT |
1039 | |
1040 | kfree(mdc800->download_urb_buffer); | |
1041 | kfree(mdc800->write_urb_buffer); | |
1042 | kfree(mdc800->irq_urb_buffer); | |
1043 | ||
1044 | usb_free_urb(mdc800->write_urb); | |
1045 | usb_free_urb(mdc800->download_urb); | |
1046 | usb_free_urb(mdc800->irq_urb); | |
1047 | ||
1048 | kfree (mdc800); | |
1049 | } | |
1050 | mdc800 = NULL; | |
1051 | return retval; | |
1052 | } | |
1053 | ||
1054 | ||
1055 | static void __exit usb_mdc800_cleanup (void) | |
1056 | { | |
1057 | usb_deregister (&mdc800_usb_driver); | |
1058 | ||
1059 | usb_free_urb (mdc800->irq_urb); | |
1060 | usb_free_urb (mdc800->download_urb); | |
1061 | usb_free_urb (mdc800->write_urb); | |
1062 | ||
1063 | kfree (mdc800->irq_urb_buffer); | |
1064 | kfree (mdc800->write_urb_buffer); | |
1065 | kfree (mdc800->download_urb_buffer); | |
1066 | ||
1067 | kfree (mdc800); | |
1068 | mdc800 = NULL; | |
1069 | } | |
1070 | ||
1071 | module_init (usb_mdc800_init); | |
1072 | module_exit (usb_mdc800_cleanup); | |
1073 | ||
1074 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1075 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1076 | MODULE_LICENSE("GPL"); | |
1077 |