1 /***************************************************************************
2 * V4L2 driver for ET61X[12]51 PC Camera Controllers *
3 * *
4 * Copyright (C) 2006-2007 by Luca Risolia <luca.risolia@studio.unibo.it> *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the Free Software *
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
19 ***************************************************************************/
20
21 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
22
23 #include <linux/version.h>
24 #include <linux/module.h>
25 #include <linux/init.h>
26 #include <linux/kernel.h>
27 #include <linux/param.h>
28 #include <linux/errno.h>
29 #include <linux/slab.h>
30 #include <linux/device.h>
31 #include <linux/fs.h>
32 #include <linux/delay.h>
33 #include <linux/compiler.h>
34 #include <linux/ioctl.h>
35 #include <linux/poll.h>
36 #include <linux/stat.h>
37 #include <linux/mm.h>
38 #include <linux/vmalloc.h>
39 #include <linux/page-flags.h>
40 #include <media/v4l2-ioctl.h>
41 #include <asm/byteorder.h>
42 #include <asm/page.h>
43 #include <asm/uaccess.h>
44
45 #include "et61x251.h"
46
47 /*****************************************************************************/
48
49 #define ET61X251_MODULE_NAME "V4L2 driver for ET61X[12]51 " \
50 "PC Camera Controllers"
51 #define ET61X251_MODULE_AUTHOR "(C) 2006-2007 Luca Risolia"
52 #define ET61X251_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
53 #define ET61X251_MODULE_LICENSE "GPL"
54 #define ET61X251_MODULE_VERSION "1.1.10"
55
56 /*****************************************************************************/
57
58 MODULE_DEVICE_TABLE(usb, et61x251_id_table);
59
60 MODULE_AUTHOR(ET61X251_MODULE_AUTHOR " " ET61X251_AUTHOR_EMAIL);
61 MODULE_DESCRIPTION(ET61X251_MODULE_NAME);
62 MODULE_VERSION(ET61X251_MODULE_VERSION);
63 MODULE_LICENSE(ET61X251_MODULE_LICENSE);
64
65 static short video_nr[] = {[0 ... ET61X251_MAX_DEVICES-1] = -1};
66 module_param_array(video_nr, short, NULL, 0444);
67 MODULE_PARM_DESC(video_nr,
68 "\n<-1|n[,...]> Specify V4L2 minor mode number."
69 "\n -1 = use next available (default)"
70 "\n n = use minor number n (integer >= 0)"
71 "\nYou can specify up to "
72 __MODULE_STRING(ET61X251_MAX_DEVICES) " cameras this way."
73 "\nFor example:"
74 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
75 "\nthe second registered camera and use auto for the first"
76 "\none and for every other camera."
77 "\n");
78
79 static bool force_munmap[] = {[0 ... ET61X251_MAX_DEVICES-1] =
80 ET61X251_FORCE_MUNMAP};
81 module_param_array(force_munmap, bool, NULL, 0444);
82 MODULE_PARM_DESC(force_munmap,
83 "\n<0|1[,...]> Force the application to unmap previously"
84 "\nmapped buffer memory before calling any VIDIOC_S_CROP or"
85 "\nVIDIOC_S_FMT ioctl's. Not all the applications support"
86 "\nthis feature. This parameter is specific for each"
87 "\ndetected camera."
88 "\n 0 = do not force memory unmapping"
89 "\n 1 = force memory unmapping (save memory)"
90 "\nDefault value is "__MODULE_STRING(ET61X251_FORCE_MUNMAP)"."
91 "\n");
92
93 static unsigned int frame_timeout[] = {[0 ... ET61X251_MAX_DEVICES-1] =
94 ET61X251_FRAME_TIMEOUT};
95 module_param_array(frame_timeout, uint, NULL, 0644);
96 MODULE_PARM_DESC(frame_timeout,
97 "\n<n[,...]> Timeout for a video frame in seconds."
98 "\nThis parameter is specific for each detected camera."
99 "\nDefault value is "
100 __MODULE_STRING(ET61X251_FRAME_TIMEOUT)"."
101 "\n");
102
103 #ifdef ET61X251_DEBUG
104 static unsigned short debug = ET61X251_DEBUG_LEVEL;
105 module_param(debug, ushort, 0644);
106 MODULE_PARM_DESC(debug,
107 "\n<n> Debugging information level, from 0 to 3:"
108 "\n0 = none (use carefully)"
109 "\n1 = critical errors"
110 "\n2 = significant informations"
111 "\n3 = more verbose messages"
112 "\nLevel 3 is useful for testing only, when only "
113 "one device is used."
114 "\nDefault value is "__MODULE_STRING(ET61X251_DEBUG_LEVEL)"."
115 "\n");
116 #endif
117
118 /*****************************************************************************/
119
120 static u32
et61x251_request_buffers(struct et61x251_device * cam,u32 count,enum et61x251_io_method io)121 et61x251_request_buffers(struct et61x251_device* cam, u32 count,
122 enum et61x251_io_method io)
123 {
124 struct v4l2_pix_format* p = &(cam->sensor.pix_format);
125 struct v4l2_rect* r = &(cam->sensor.cropcap.bounds);
126 const size_t imagesize = cam->module_param.force_munmap ||
127 io == IO_READ ?
128 (p->width * p->height * p->priv) / 8 :
129 (r->width * r->height * p->priv) / 8;
130 void* buff = NULL;
131 u32 i;
132
133 if (count > ET61X251_MAX_FRAMES)
134 count = ET61X251_MAX_FRAMES;
135
136 cam->nbuffers = count;
137 while (cam->nbuffers > 0) {
138 if ((buff = vmalloc_32_user(cam->nbuffers *
139 PAGE_ALIGN(imagesize))))
140 break;
141 cam->nbuffers--;
142 }
143
144 for (i = 0; i < cam->nbuffers; i++) {
145 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
146 cam->frame[i].buf.index = i;
147 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
148 cam->frame[i].buf.length = imagesize;
149 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
150 cam->frame[i].buf.sequence = 0;
151 cam->frame[i].buf.field = V4L2_FIELD_NONE;
152 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
153 cam->frame[i].buf.flags = 0;
154 }
155
156 return cam->nbuffers;
157 }
158
159
et61x251_release_buffers(struct et61x251_device * cam)160 static void et61x251_release_buffers(struct et61x251_device* cam)
161 {
162 if (cam->nbuffers) {
163 vfree(cam->frame[0].bufmem);
164 cam->nbuffers = 0;
165 }
166 cam->frame_current = NULL;
167 }
168
169
et61x251_empty_framequeues(struct et61x251_device * cam)170 static void et61x251_empty_framequeues(struct et61x251_device* cam)
171 {
172 u32 i;
173
174 INIT_LIST_HEAD(&cam->inqueue);
175 INIT_LIST_HEAD(&cam->outqueue);
176
177 for (i = 0; i < ET61X251_MAX_FRAMES; i++) {
178 cam->frame[i].state = F_UNUSED;
179 cam->frame[i].buf.bytesused = 0;
180 }
181 }
182
183
et61x251_requeue_outqueue(struct et61x251_device * cam)184 static void et61x251_requeue_outqueue(struct et61x251_device* cam)
185 {
186 struct et61x251_frame_t *i;
187
188 list_for_each_entry(i, &cam->outqueue, frame) {
189 i->state = F_QUEUED;
190 list_add(&i->frame, &cam->inqueue);
191 }
192
193 INIT_LIST_HEAD(&cam->outqueue);
194 }
195
196
et61x251_queue_unusedframes(struct et61x251_device * cam)197 static void et61x251_queue_unusedframes(struct et61x251_device* cam)
198 {
199 unsigned long lock_flags;
200 u32 i;
201
202 for (i = 0; i < cam->nbuffers; i++)
203 if (cam->frame[i].state == F_UNUSED) {
204 cam->frame[i].state = F_QUEUED;
205 spin_lock_irqsave(&cam->queue_lock, lock_flags);
206 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
207 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
208 }
209 }
210
211 /*****************************************************************************/
212
et61x251_write_reg(struct et61x251_device * cam,u8 value,u16 index)213 int et61x251_write_reg(struct et61x251_device* cam, u8 value, u16 index)
214 {
215 struct usb_device* udev = cam->usbdev;
216 u8* buff = cam->control_buffer;
217 int res;
218
219 *buff = value;
220
221 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
222 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
223 if (res < 0) {
224 DBG(3, "Failed to write a register (value 0x%02X, index "
225 "0x%02X, error %d)", value, index, res);
226 return -1;
227 }
228
229 return 0;
230 }
231
232
et61x251_read_reg(struct et61x251_device * cam,u16 index)233 static int et61x251_read_reg(struct et61x251_device* cam, u16 index)
234 {
235 struct usb_device* udev = cam->usbdev;
236 u8* buff = cam->control_buffer;
237 int res;
238
239 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
240 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
241 if (res < 0)
242 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
243 index, res);
244
245 return (res >= 0) ? (int)(*buff) : -1;
246 }
247
248
249 static int
et61x251_i2c_wait(struct et61x251_device * cam,const struct et61x251_sensor * sensor)250 et61x251_i2c_wait(struct et61x251_device* cam,
251 const struct et61x251_sensor* sensor)
252 {
253 int i, r;
254
255 for (i = 1; i <= 8; i++) {
256 if (sensor->interface == ET61X251_I2C_3WIRES) {
257 r = et61x251_read_reg(cam, 0x8e);
258 if (!(r & 0x02) && (r >= 0))
259 return 0;
260 } else {
261 r = et61x251_read_reg(cam, 0x8b);
262 if (!(r & 0x01) && (r >= 0))
263 return 0;
264 }
265 if (r < 0)
266 return -EIO;
267 udelay(8*8); /* minimum for sensors at 400kHz */
268 }
269
270 return -EBUSY;
271 }
272
273
274 int
et61x251_i2c_raw_write(struct et61x251_device * cam,u8 n,u8 data1,u8 data2,u8 data3,u8 data4,u8 data5,u8 data6,u8 data7,u8 data8,u8 address)275 et61x251_i2c_raw_write(struct et61x251_device* cam, u8 n, u8 data1, u8 data2,
276 u8 data3, u8 data4, u8 data5, u8 data6, u8 data7,
277 u8 data8, u8 address)
278 {
279 struct usb_device* udev = cam->usbdev;
280 u8* data = cam->control_buffer;
281 int err = 0, res;
282
283 data[0] = data2;
284 data[1] = data3;
285 data[2] = data4;
286 data[3] = data5;
287 data[4] = data6;
288 data[5] = data7;
289 data[6] = data8;
290 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
291 0, 0x81, data, n-1, ET61X251_CTRL_TIMEOUT);
292 if (res < 0)
293 err += res;
294
295 data[0] = address;
296 data[1] = cam->sensor.i2c_slave_id;
297 data[2] = cam->sensor.rsta | 0x02 | (n << 4);
298 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
299 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
300 if (res < 0)
301 err += res;
302
303 /* Start writing through the serial interface */
304 data[0] = data1;
305 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
306 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
307 if (res < 0)
308 err += res;
309
310 err += et61x251_i2c_wait(cam, &cam->sensor);
311
312 if (err)
313 DBG(3, "I2C raw write failed for %s image sensor",
314 cam->sensor.name);
315
316 PDBGG("I2C raw write: %u bytes, address = 0x%02X, data1 = 0x%02X, "
317 "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X,"
318 " data6 = 0x%02X, data7 = 0x%02X, data8 = 0x%02X", n, address,
319 data1, data2, data3, data4, data5, data6, data7, data8);
320
321 return err ? -1 : 0;
322
323 }
324
325
326 /*****************************************************************************/
327
et61x251_urb_complete(struct urb * urb)328 static void et61x251_urb_complete(struct urb *urb)
329 {
330 struct et61x251_device* cam = urb->context;
331 struct et61x251_frame_t** f;
332 size_t imagesize;
333 u8 i;
334 int err = 0;
335
336 if (urb->status == -ENOENT)
337 return;
338
339 f = &cam->frame_current;
340
341 if (cam->stream == STREAM_INTERRUPT) {
342 cam->stream = STREAM_OFF;
343 if ((*f))
344 (*f)->state = F_QUEUED;
345 DBG(3, "Stream interrupted");
346 wake_up(&cam->wait_stream);
347 }
348
349 if (cam->state & DEV_DISCONNECTED)
350 return;
351
352 if (cam->state & DEV_MISCONFIGURED) {
353 wake_up_interruptible(&cam->wait_frame);
354 return;
355 }
356
357 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
358 goto resubmit_urb;
359
360 if (!(*f))
361 (*f) = list_entry(cam->inqueue.next, struct et61x251_frame_t,
362 frame);
363
364 imagesize = (cam->sensor.pix_format.width *
365 cam->sensor.pix_format.height *
366 cam->sensor.pix_format.priv) / 8;
367
368 for (i = 0; i < urb->number_of_packets; i++) {
369 unsigned int len, status;
370 void *pos;
371 u8* b1, * b2, sof;
372 const u8 VOID_BYTES = 6;
373 size_t imglen;
374
375 len = urb->iso_frame_desc[i].actual_length;
376 status = urb->iso_frame_desc[i].status;
377 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
378
379 if (status) {
380 DBG(3, "Error in isochronous frame");
381 (*f)->state = F_ERROR;
382 continue;
383 }
384
385 b1 = pos++;
386 b2 = pos++;
387 sof = ((*b1 & 0x3f) == 63);
388 imglen = ((*b1 & 0xc0) << 2) | *b2;
389
390 PDBGG("Isochrnous frame: length %u, #%u i, image length %zu",
391 len, i, imglen);
392
393 if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR)
394 start_of_frame:
395 if (sof) {
396 (*f)->state = F_GRABBING;
397 (*f)->buf.bytesused = 0;
398 do_gettimeofday(&(*f)->buf.timestamp);
399 pos += 22;
400 DBG(3, "SOF detected: new video frame");
401 }
402
403 if ((*f)->state == F_GRABBING) {
404 if (sof && (*f)->buf.bytesused) {
405 if (cam->sensor.pix_format.pixelformat ==
406 V4L2_PIX_FMT_ET61X251)
407 goto end_of_frame;
408 else {
409 DBG(3, "Not expected SOF detected "
410 "after %lu bytes",
411 (unsigned long)(*f)->buf.bytesused);
412 (*f)->state = F_ERROR;
413 continue;
414 }
415 }
416
417 if ((*f)->buf.bytesused + imglen > imagesize) {
418 DBG(3, "Video frame size exceeded");
419 (*f)->state = F_ERROR;
420 continue;
421 }
422
423 pos += VOID_BYTES;
424
425 memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, imglen);
426 (*f)->buf.bytesused += imglen;
427
428 if ((*f)->buf.bytesused == imagesize) {
429 u32 b;
430 end_of_frame:
431 b = (*f)->buf.bytesused;
432 (*f)->state = F_DONE;
433 (*f)->buf.sequence= ++cam->frame_count;
434 spin_lock(&cam->queue_lock);
435 list_move_tail(&(*f)->frame, &cam->outqueue);
436 if (!list_empty(&cam->inqueue))
437 (*f) = list_entry(cam->inqueue.next,
438 struct et61x251_frame_t,
439 frame);
440 else
441 (*f) = NULL;
442 spin_unlock(&cam->queue_lock);
443 DBG(3, "Video frame captured: : %lu bytes",
444 (unsigned long)(b));
445
446 if (!(*f))
447 goto resubmit_urb;
448
449 if (sof &&
450 cam->sensor.pix_format.pixelformat ==
451 V4L2_PIX_FMT_ET61X251)
452 goto start_of_frame;
453 }
454 }
455 }
456
457 resubmit_urb:
458 urb->dev = cam->usbdev;
459 err = usb_submit_urb(urb, GFP_ATOMIC);
460 if (err < 0 && err != -EPERM) {
461 cam->state |= DEV_MISCONFIGURED;
462 DBG(1, "usb_submit_urb() failed");
463 }
464
465 wake_up_interruptible(&cam->wait_frame);
466 }
467
468
et61x251_start_transfer(struct et61x251_device * cam)469 static int et61x251_start_transfer(struct et61x251_device* cam)
470 {
471 struct usb_device *udev = cam->usbdev;
472 struct urb* urb;
473 struct usb_host_interface* altsetting = usb_altnum_to_altsetting(
474 usb_ifnum_to_if(udev, 0),
475 ET61X251_ALTERNATE_SETTING);
476 const unsigned int psz = le16_to_cpu(altsetting->
477 endpoint[0].desc.wMaxPacketSize);
478 s8 i, j;
479 int err = 0;
480
481 for (i = 0; i < ET61X251_URBS; i++) {
482 cam->transfer_buffer[i] = kzalloc(ET61X251_ISO_PACKETS * psz,
483 GFP_KERNEL);
484 if (!cam->transfer_buffer[i]) {
485 err = -ENOMEM;
486 DBG(1, "Not enough memory");
487 goto free_buffers;
488 }
489 }
490
491 for (i = 0; i < ET61X251_URBS; i++) {
492 urb = usb_alloc_urb(ET61X251_ISO_PACKETS, GFP_KERNEL);
493 cam->urb[i] = urb;
494 if (!urb) {
495 err = -ENOMEM;
496 DBG(1, "usb_alloc_urb() failed");
497 goto free_urbs;
498 }
499 urb->dev = udev;
500 urb->context = cam;
501 urb->pipe = usb_rcvisocpipe(udev, 1);
502 urb->transfer_flags = URB_ISO_ASAP;
503 urb->number_of_packets = ET61X251_ISO_PACKETS;
504 urb->complete = et61x251_urb_complete;
505 urb->transfer_buffer = cam->transfer_buffer[i];
506 urb->transfer_buffer_length = psz * ET61X251_ISO_PACKETS;
507 urb->interval = 1;
508 for (j = 0; j < ET61X251_ISO_PACKETS; j++) {
509 urb->iso_frame_desc[j].offset = psz * j;
510 urb->iso_frame_desc[j].length = psz;
511 }
512 }
513
514 err = et61x251_write_reg(cam, 0x01, 0x03);
515 err = et61x251_write_reg(cam, 0x00, 0x03);
516 err = et61x251_write_reg(cam, 0x08, 0x03);
517 if (err) {
518 err = -EIO;
519 DBG(1, "I/O hardware error");
520 goto free_urbs;
521 }
522
523 err = usb_set_interface(udev, 0, ET61X251_ALTERNATE_SETTING);
524 if (err) {
525 DBG(1, "usb_set_interface() failed");
526 goto free_urbs;
527 }
528
529 cam->frame_current = NULL;
530
531 for (i = 0; i < ET61X251_URBS; i++) {
532 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
533 if (err) {
534 for (j = i-1; j >= 0; j--)
535 usb_kill_urb(cam->urb[j]);
536 DBG(1, "usb_submit_urb() failed, error %d", err);
537 goto free_urbs;
538 }
539 }
540
541 return 0;
542
543 free_urbs:
544 for (i = 0; (i < ET61X251_URBS) && cam->urb[i]; i++)
545 usb_free_urb(cam->urb[i]);
546
547 free_buffers:
548 for (i = 0; (i < ET61X251_URBS) && cam->transfer_buffer[i]; i++)
549 kfree(cam->transfer_buffer[i]);
550
551 return err;
552 }
553
554
et61x251_stop_transfer(struct et61x251_device * cam)555 static int et61x251_stop_transfer(struct et61x251_device* cam)
556 {
557 struct usb_device *udev = cam->usbdev;
558 s8 i;
559 int err = 0;
560
561 if (cam->state & DEV_DISCONNECTED)
562 return 0;
563
564 for (i = ET61X251_URBS-1; i >= 0; i--) {
565 usb_kill_urb(cam->urb[i]);
566 usb_free_urb(cam->urb[i]);
567 kfree(cam->transfer_buffer[i]);
568 }
569
570 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
571 if (err)
572 DBG(3, "usb_set_interface() failed");
573
574 return err;
575 }
576
577
et61x251_stream_interrupt(struct et61x251_device * cam)578 static int et61x251_stream_interrupt(struct et61x251_device* cam)
579 {
580 long timeout;
581
582 cam->stream = STREAM_INTERRUPT;
583 timeout = wait_event_timeout(cam->wait_stream,
584 (cam->stream == STREAM_OFF) ||
585 (cam->state & DEV_DISCONNECTED),
586 ET61X251_URB_TIMEOUT);
587 if (cam->state & DEV_DISCONNECTED)
588 return -ENODEV;
589 else if (cam->stream != STREAM_OFF) {
590 cam->state |= DEV_MISCONFIGURED;
591 DBG(1, "URB timeout reached. The camera is misconfigured. To "
592 "use it, close and open %s again.",
593 video_device_node_name(cam->v4ldev));
594 return -EIO;
595 }
596
597 return 0;
598 }
599
600 /*****************************************************************************/
601
602 #ifdef CONFIG_VIDEO_ADV_DEBUG
603
et61x251_i2c_try_read(struct et61x251_device * cam,const struct et61x251_sensor * sensor,u8 address)604 static int et61x251_i2c_try_read(struct et61x251_device* cam,
605 const struct et61x251_sensor* sensor,
606 u8 address)
607 {
608 struct usb_device* udev = cam->usbdev;
609 u8* data = cam->control_buffer;
610 int err = 0, res;
611
612 data[0] = address;
613 data[1] = cam->sensor.i2c_slave_id;
614 data[2] = cam->sensor.rsta | 0x10;
615 data[3] = !(et61x251_read_reg(cam, 0x8b) & 0x02);
616 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
617 0, 0x88, data, 4, ET61X251_CTRL_TIMEOUT);
618 if (res < 0)
619 err += res;
620
621 err += et61x251_i2c_wait(cam, sensor);
622
623 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
624 0, 0x80, data, 8, ET61X251_CTRL_TIMEOUT);
625 if (res < 0)
626 err += res;
627
628 if (err)
629 DBG(3, "I2C read failed for %s image sensor", sensor->name);
630
631 PDBGG("I2C read: address 0x%02X, value: 0x%02X", address, data[0]);
632
633 return err ? -1 : (int)data[0];
634 }
635
636
et61x251_i2c_try_write(struct et61x251_device * cam,const struct et61x251_sensor * sensor,u8 address,u8 value)637 static int et61x251_i2c_try_write(struct et61x251_device* cam,
638 const struct et61x251_sensor* sensor,
639 u8 address, u8 value)
640 {
641 struct usb_device* udev = cam->usbdev;
642 u8* data = cam->control_buffer;
643 int err = 0, res;
644
645 data[0] = address;
646 data[1] = cam->sensor.i2c_slave_id;
647 data[2] = cam->sensor.rsta | 0x12;
648 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
649 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
650 if (res < 0)
651 err += res;
652
653 data[0] = value;
654 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
655 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
656 if (res < 0)
657 err += res;
658
659 err += et61x251_i2c_wait(cam, sensor);
660
661 if (err)
662 DBG(3, "I2C write failed for %s image sensor", sensor->name);
663
664 PDBGG("I2C write: address 0x%02X, value: 0x%02X", address, value);
665
666 return err ? -1 : 0;
667 }
668
et61x251_i2c_read(struct et61x251_device * cam,u8 address)669 static int et61x251_i2c_read(struct et61x251_device* cam, u8 address)
670 {
671 return et61x251_i2c_try_read(cam, &cam->sensor, address);
672 }
673
et61x251_i2c_write(struct et61x251_device * cam,u8 address,u8 value)674 static int et61x251_i2c_write(struct et61x251_device* cam,
675 u8 address, u8 value)
676 {
677 return et61x251_i2c_try_write(cam, &cam->sensor, address, value);
678 }
679
et61x251_strtou8(const char * buff,size_t len,ssize_t * count)680 static u8 et61x251_strtou8(const char* buff, size_t len, ssize_t* count)
681 {
682 char str[5];
683 char* endp;
684 unsigned long val;
685
686 if (len < 4) {
687 strncpy(str, buff, len);
688 str[len] = '\0';
689 } else {
690 strncpy(str, buff, 4);
691 str[4] = '\0';
692 }
693
694 val = simple_strtoul(str, &endp, 0);
695
696 *count = 0;
697 if (val <= 0xff)
698 *count = (ssize_t)(endp - str);
699 if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
700 *count += 1;
701
702 return (u8)val;
703 }
704
705 /*
706 NOTE 1: being inside one of the following methods implies that the v4l
707 device exists for sure (see kobjects and reference counters)
708 NOTE 2: buffers are PAGE_SIZE long
709 */
710
et61x251_show_reg(struct device * cd,struct device_attribute * attr,char * buf)711 static ssize_t et61x251_show_reg(struct device* cd,
712 struct device_attribute *attr, char* buf)
713 {
714 struct et61x251_device* cam;
715 ssize_t count;
716
717 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
718 return -ERESTARTSYS;
719
720 cam = video_get_drvdata(to_video_device(cd));
721 if (!cam) {
722 mutex_unlock(&et61x251_sysfs_lock);
723 return -ENODEV;
724 }
725
726 count = sprintf(buf, "%u\n", cam->sysfs.reg);
727
728 mutex_unlock(&et61x251_sysfs_lock);
729
730 return count;
731 }
732
733
734 static ssize_t
et61x251_store_reg(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)735 et61x251_store_reg(struct device* cd,
736 struct device_attribute *attr, const char* buf, size_t len)
737 {
738 struct et61x251_device* cam;
739 u8 index;
740 ssize_t count;
741
742 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
743 return -ERESTARTSYS;
744
745 cam = video_get_drvdata(to_video_device(cd));
746 if (!cam) {
747 mutex_unlock(&et61x251_sysfs_lock);
748 return -ENODEV;
749 }
750
751 index = et61x251_strtou8(buf, len, &count);
752 if (index > 0x8e || !count) {
753 mutex_unlock(&et61x251_sysfs_lock);
754 return -EINVAL;
755 }
756
757 cam->sysfs.reg = index;
758
759 DBG(2, "Moved ET61X[12]51 register index to 0x%02X", cam->sysfs.reg);
760 DBG(3, "Written bytes: %zd", count);
761
762 mutex_unlock(&et61x251_sysfs_lock);
763
764 return count;
765 }
766
767
et61x251_show_val(struct device * cd,struct device_attribute * attr,char * buf)768 static ssize_t et61x251_show_val(struct device* cd,
769 struct device_attribute *attr, char* buf)
770 {
771 struct et61x251_device* cam;
772 ssize_t count;
773 int val;
774
775 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
776 return -ERESTARTSYS;
777
778 cam = video_get_drvdata(to_video_device(cd));
779 if (!cam) {
780 mutex_unlock(&et61x251_sysfs_lock);
781 return -ENODEV;
782 }
783
784 if ((val = et61x251_read_reg(cam, cam->sysfs.reg)) < 0) {
785 mutex_unlock(&et61x251_sysfs_lock);
786 return -EIO;
787 }
788
789 count = sprintf(buf, "%d\n", val);
790
791 DBG(3, "Read bytes: %zd", count);
792
793 mutex_unlock(&et61x251_sysfs_lock);
794
795 return count;
796 }
797
798
799 static ssize_t
et61x251_store_val(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)800 et61x251_store_val(struct device* cd, struct device_attribute *attr,
801 const char* buf, size_t len)
802 {
803 struct et61x251_device* cam;
804 u8 value;
805 ssize_t count;
806 int err;
807
808 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
809 return -ERESTARTSYS;
810
811 cam = video_get_drvdata(to_video_device(cd));
812 if (!cam) {
813 mutex_unlock(&et61x251_sysfs_lock);
814 return -ENODEV;
815 }
816
817 value = et61x251_strtou8(buf, len, &count);
818 if (!count) {
819 mutex_unlock(&et61x251_sysfs_lock);
820 return -EINVAL;
821 }
822
823 err = et61x251_write_reg(cam, value, cam->sysfs.reg);
824 if (err) {
825 mutex_unlock(&et61x251_sysfs_lock);
826 return -EIO;
827 }
828
829 DBG(2, "Written ET61X[12]51 reg. 0x%02X, val. 0x%02X",
830 cam->sysfs.reg, value);
831 DBG(3, "Written bytes: %zd", count);
832
833 mutex_unlock(&et61x251_sysfs_lock);
834
835 return count;
836 }
837
838
et61x251_show_i2c_reg(struct device * cd,struct device_attribute * attr,char * buf)839 static ssize_t et61x251_show_i2c_reg(struct device* cd,
840 struct device_attribute *attr, char* buf)
841 {
842 struct et61x251_device* cam;
843 ssize_t count;
844
845 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
846 return -ERESTARTSYS;
847
848 cam = video_get_drvdata(to_video_device(cd));
849 if (!cam) {
850 mutex_unlock(&et61x251_sysfs_lock);
851 return -ENODEV;
852 }
853
854 count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
855
856 DBG(3, "Read bytes: %zd", count);
857
858 mutex_unlock(&et61x251_sysfs_lock);
859
860 return count;
861 }
862
863
864 static ssize_t
et61x251_store_i2c_reg(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)865 et61x251_store_i2c_reg(struct device* cd, struct device_attribute *attr,
866 const char* buf, size_t len)
867 {
868 struct et61x251_device* cam;
869 u8 index;
870 ssize_t count;
871
872 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
873 return -ERESTARTSYS;
874
875 cam = video_get_drvdata(to_video_device(cd));
876 if (!cam) {
877 mutex_unlock(&et61x251_sysfs_lock);
878 return -ENODEV;
879 }
880
881 index = et61x251_strtou8(buf, len, &count);
882 if (!count) {
883 mutex_unlock(&et61x251_sysfs_lock);
884 return -EINVAL;
885 }
886
887 cam->sysfs.i2c_reg = index;
888
889 DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
890 DBG(3, "Written bytes: %zd", count);
891
892 mutex_unlock(&et61x251_sysfs_lock);
893
894 return count;
895 }
896
897
et61x251_show_i2c_val(struct device * cd,struct device_attribute * attr,char * buf)898 static ssize_t et61x251_show_i2c_val(struct device* cd,
899 struct device_attribute *attr, char* buf)
900 {
901 struct et61x251_device* cam;
902 ssize_t count;
903 int val;
904
905 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
906 return -ERESTARTSYS;
907
908 cam = video_get_drvdata(to_video_device(cd));
909 if (!cam) {
910 mutex_unlock(&et61x251_sysfs_lock);
911 return -ENODEV;
912 }
913
914 if (!(cam->sensor.sysfs_ops & ET61X251_I2C_READ)) {
915 mutex_unlock(&et61x251_sysfs_lock);
916 return -ENOSYS;
917 }
918
919 if ((val = et61x251_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
920 mutex_unlock(&et61x251_sysfs_lock);
921 return -EIO;
922 }
923
924 count = sprintf(buf, "%d\n", val);
925
926 DBG(3, "Read bytes: %zd", count);
927
928 mutex_unlock(&et61x251_sysfs_lock);
929
930 return count;
931 }
932
933
934 static ssize_t
et61x251_store_i2c_val(struct device * cd,struct device_attribute * attr,const char * buf,size_t len)935 et61x251_store_i2c_val(struct device* cd, struct device_attribute *attr,
936 const char* buf, size_t len)
937 {
938 struct et61x251_device* cam;
939 u8 value;
940 ssize_t count;
941 int err;
942
943 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
944 return -ERESTARTSYS;
945
946 cam = video_get_drvdata(to_video_device(cd));
947 if (!cam) {
948 mutex_unlock(&et61x251_sysfs_lock);
949 return -ENODEV;
950 }
951
952 if (!(cam->sensor.sysfs_ops & ET61X251_I2C_READ)) {
953 mutex_unlock(&et61x251_sysfs_lock);
954 return -ENOSYS;
955 }
956
957 value = et61x251_strtou8(buf, len, &count);
958 if (!count) {
959 mutex_unlock(&et61x251_sysfs_lock);
960 return -EINVAL;
961 }
962
963 err = et61x251_i2c_write(cam, cam->sysfs.i2c_reg, value);
964 if (err) {
965 mutex_unlock(&et61x251_sysfs_lock);
966 return -EIO;
967 }
968
969 DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
970 cam->sysfs.i2c_reg, value);
971 DBG(3, "Written bytes: %zd", count);
972
973 mutex_unlock(&et61x251_sysfs_lock);
974
975 return count;
976 }
977
978
979 static DEVICE_ATTR(reg, S_IRUGO | S_IWUSR,
980 et61x251_show_reg, et61x251_store_reg);
981 static DEVICE_ATTR(val, S_IRUGO | S_IWUSR,
982 et61x251_show_val, et61x251_store_val);
983 static DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
984 et61x251_show_i2c_reg, et61x251_store_i2c_reg);
985 static DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
986 et61x251_show_i2c_val, et61x251_store_i2c_val);
987
988
et61x251_create_sysfs(struct et61x251_device * cam)989 static int et61x251_create_sysfs(struct et61x251_device* cam)
990 {
991 struct device *classdev = &(cam->v4ldev->dev);
992 int err = 0;
993
994 if ((err = device_create_file(classdev, &dev_attr_reg)))
995 goto err_out;
996 if ((err = device_create_file(classdev, &dev_attr_val)))
997 goto err_reg;
998
999 if (cam->sensor.sysfs_ops) {
1000 if ((err = device_create_file(classdev, &dev_attr_i2c_reg)))
1001 goto err_val;
1002 if ((err = device_create_file(classdev, &dev_attr_i2c_val)))
1003 goto err_i2c_reg;
1004 }
1005
1006 err_i2c_reg:
1007 if (cam->sensor.sysfs_ops)
1008 device_remove_file(classdev, &dev_attr_i2c_reg);
1009 err_val:
1010 device_remove_file(classdev, &dev_attr_val);
1011 err_reg:
1012 device_remove_file(classdev, &dev_attr_reg);
1013 err_out:
1014 return err;
1015 }
1016 #endif /* CONFIG_VIDEO_ADV_DEBUG */
1017
1018 /*****************************************************************************/
1019
1020 static int
et61x251_set_pix_format(struct et61x251_device * cam,struct v4l2_pix_format * pix)1021 et61x251_set_pix_format(struct et61x251_device* cam,
1022 struct v4l2_pix_format* pix)
1023 {
1024 int r, err = 0;
1025
1026 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1027 err += r;
1028 if (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1029 err += et61x251_write_reg(cam, r & 0xfd, 0x12);
1030 else
1031 err += et61x251_write_reg(cam, r | 0x02, 0x12);
1032
1033 return err ? -EIO : 0;
1034 }
1035
1036
1037 static int
et61x251_set_compression(struct et61x251_device * cam,struct v4l2_jpegcompression * compression)1038 et61x251_set_compression(struct et61x251_device* cam,
1039 struct v4l2_jpegcompression* compression)
1040 {
1041 int r, err = 0;
1042
1043 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1044 err += r;
1045 if (compression->quality == 0)
1046 err += et61x251_write_reg(cam, r & 0xfb, 0x12);
1047 else
1048 err += et61x251_write_reg(cam, r | 0x04, 0x12);
1049
1050 return err ? -EIO : 0;
1051 }
1052
1053
et61x251_set_scale(struct et61x251_device * cam,u8 scale)1054 static int et61x251_set_scale(struct et61x251_device* cam, u8 scale)
1055 {
1056 int r = 0, err = 0;
1057
1058 r = et61x251_read_reg(cam, 0x12);
1059 if (r < 0)
1060 err += r;
1061
1062 if (scale == 1)
1063 err += et61x251_write_reg(cam, r & ~0x01, 0x12);
1064 else if (scale == 2)
1065 err += et61x251_write_reg(cam, r | 0x01, 0x12);
1066
1067 if (err)
1068 return -EIO;
1069
1070 PDBGG("Scaling factor: %u", scale);
1071
1072 return 0;
1073 }
1074
1075
1076 static int
et61x251_set_crop(struct et61x251_device * cam,struct v4l2_rect * rect)1077 et61x251_set_crop(struct et61x251_device* cam, struct v4l2_rect* rect)
1078 {
1079 struct et61x251_sensor* s = &cam->sensor;
1080 u16 fmw_sx = (u16)(rect->left - s->cropcap.bounds.left +
1081 s->active_pixel.left),
1082 fmw_sy = (u16)(rect->top - s->cropcap.bounds.top +
1083 s->active_pixel.top),
1084 fmw_length = (u16)(rect->width),
1085 fmw_height = (u16)(rect->height);
1086 int err = 0;
1087
1088 err += et61x251_write_reg(cam, fmw_sx & 0xff, 0x69);
1089 err += et61x251_write_reg(cam, fmw_sy & 0xff, 0x6a);
1090 err += et61x251_write_reg(cam, fmw_length & 0xff, 0x6b);
1091 err += et61x251_write_reg(cam, fmw_height & 0xff, 0x6c);
1092 err += et61x251_write_reg(cam, (fmw_sx >> 8) | ((fmw_sy & 0x300) >> 6)
1093 | ((fmw_length & 0x300) >> 4)
1094 | ((fmw_height & 0x300) >> 2), 0x6d);
1095 if (err)
1096 return -EIO;
1097
1098 PDBGG("fmw_sx, fmw_sy, fmw_length, fmw_height: %u %u %u %u",
1099 fmw_sx, fmw_sy, fmw_length, fmw_height);
1100
1101 return 0;
1102 }
1103
1104
et61x251_init(struct et61x251_device * cam)1105 static int et61x251_init(struct et61x251_device* cam)
1106 {
1107 struct et61x251_sensor* s = &cam->sensor;
1108 struct v4l2_control ctrl;
1109 struct v4l2_queryctrl *qctrl;
1110 struct v4l2_rect* rect;
1111 u8 i = 0;
1112 int err = 0;
1113
1114 if (!(cam->state & DEV_INITIALIZED)) {
1115 mutex_init(&cam->open_mutex);
1116 init_waitqueue_head(&cam->wait_open);
1117 qctrl = s->qctrl;
1118 rect = &(s->cropcap.defrect);
1119 cam->compression.quality = ET61X251_COMPRESSION_QUALITY;
1120 } else { /* use current values */
1121 qctrl = s->_qctrl;
1122 rect = &(s->_rect);
1123 }
1124
1125 err += et61x251_set_scale(cam, rect->width / s->pix_format.width);
1126 err += et61x251_set_crop(cam, rect);
1127 if (err)
1128 return err;
1129
1130 if (s->init) {
1131 err = s->init(cam);
1132 if (err) {
1133 DBG(3, "Sensor initialization failed");
1134 return err;
1135 }
1136 }
1137
1138 err += et61x251_set_compression(cam, &cam->compression);
1139 err += et61x251_set_pix_format(cam, &s->pix_format);
1140 if (s->set_pix_format)
1141 err += s->set_pix_format(cam, &s->pix_format);
1142 if (err)
1143 return err;
1144
1145 if (s->pix_format.pixelformat == V4L2_PIX_FMT_ET61X251)
1146 DBG(3, "Compressed video format is active, quality %d",
1147 cam->compression.quality);
1148 else
1149 DBG(3, "Uncompressed video format is active");
1150
1151 if (s->set_crop)
1152 if ((err = s->set_crop(cam, rect))) {
1153 DBG(3, "set_crop() failed");
1154 return err;
1155 }
1156
1157 if (s->set_ctrl) {
1158 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1159 if (s->qctrl[i].id != 0 &&
1160 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1161 ctrl.id = s->qctrl[i].id;
1162 ctrl.value = qctrl[i].default_value;
1163 err = s->set_ctrl(cam, &ctrl);
1164 if (err) {
1165 DBG(3, "Set %s control failed",
1166 s->qctrl[i].name);
1167 return err;
1168 }
1169 DBG(3, "Image sensor supports '%s' control",
1170 s->qctrl[i].name);
1171 }
1172 }
1173
1174 if (!(cam->state & DEV_INITIALIZED)) {
1175 mutex_init(&cam->fileop_mutex);
1176 spin_lock_init(&cam->queue_lock);
1177 init_waitqueue_head(&cam->wait_frame);
1178 init_waitqueue_head(&cam->wait_stream);
1179 cam->nreadbuffers = 2;
1180 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
1181 memcpy(&(s->_rect), &(s->cropcap.defrect),
1182 sizeof(struct v4l2_rect));
1183 cam->state |= DEV_INITIALIZED;
1184 }
1185
1186 DBG(2, "Initialization succeeded");
1187 return 0;
1188 }
1189
1190 /*****************************************************************************/
1191
et61x251_release_resources(struct kref * kref)1192 static void et61x251_release_resources(struct kref *kref)
1193 {
1194 struct et61x251_device *cam;
1195
1196 mutex_lock(&et61x251_sysfs_lock);
1197
1198 cam = container_of(kref, struct et61x251_device, kref);
1199
1200 DBG(2, "V4L2 device %s deregistered",
1201 video_device_node_name(cam->v4ldev));
1202 video_set_drvdata(cam->v4ldev, NULL);
1203 video_unregister_device(cam->v4ldev);
1204 usb_put_dev(cam->usbdev);
1205 kfree(cam->control_buffer);
1206 kfree(cam);
1207
1208 mutex_unlock(&et61x251_sysfs_lock);
1209 }
1210
1211
et61x251_open(struct file * filp)1212 static int et61x251_open(struct file *filp)
1213 {
1214 struct et61x251_device* cam;
1215 int err = 0;
1216
1217 if (!down_read_trylock(&et61x251_dev_lock))
1218 return -ERESTARTSYS;
1219
1220 cam = video_drvdata(filp);
1221
1222 if (wait_for_completion_interruptible(&cam->probe)) {
1223 up_read(&et61x251_dev_lock);
1224 return -ERESTARTSYS;
1225 }
1226
1227 kref_get(&cam->kref);
1228
1229 if (mutex_lock_interruptible(&cam->open_mutex)) {
1230 kref_put(&cam->kref, et61x251_release_resources);
1231 up_read(&et61x251_dev_lock);
1232 return -ERESTARTSYS;
1233 }
1234
1235 if (cam->state & DEV_DISCONNECTED) {
1236 DBG(1, "Device not present");
1237 err = -ENODEV;
1238 goto out;
1239 }
1240
1241 if (cam->users) {
1242 DBG(2, "Device %s is already in use",
1243 video_device_node_name(cam->v4ldev));
1244 DBG(3, "Simultaneous opens are not supported");
1245 if ((filp->f_flags & O_NONBLOCK) ||
1246 (filp->f_flags & O_NDELAY)) {
1247 err = -EWOULDBLOCK;
1248 goto out;
1249 }
1250 DBG(2, "A blocking open() has been requested. Wait for the "
1251 "device to be released...");
1252 up_read(&et61x251_dev_lock);
1253 err = wait_event_interruptible_exclusive(cam->wait_open,
1254 (cam->state & DEV_DISCONNECTED)
1255 || !cam->users);
1256 down_read(&et61x251_dev_lock);
1257 if (err)
1258 goto out;
1259 if (cam->state & DEV_DISCONNECTED) {
1260 err = -ENODEV;
1261 goto out;
1262 }
1263 }
1264
1265 if (cam->state & DEV_MISCONFIGURED) {
1266 err = et61x251_init(cam);
1267 if (err) {
1268 DBG(1, "Initialization failed again. "
1269 "I will retry on next open().");
1270 goto out;
1271 }
1272 cam->state &= ~DEV_MISCONFIGURED;
1273 }
1274
1275 if ((err = et61x251_start_transfer(cam)))
1276 goto out;
1277
1278 filp->private_data = cam;
1279 cam->users++;
1280 cam->io = IO_NONE;
1281 cam->stream = STREAM_OFF;
1282 cam->nbuffers = 0;
1283 cam->frame_count = 0;
1284 et61x251_empty_framequeues(cam);
1285
1286 DBG(3, "Video device %s is open",
1287 video_device_node_name(cam->v4ldev));
1288
1289 out:
1290 mutex_unlock(&cam->open_mutex);
1291 if (err)
1292 kref_put(&cam->kref, et61x251_release_resources);
1293 up_read(&et61x251_dev_lock);
1294 return err;
1295 }
1296
1297
et61x251_release(struct file * filp)1298 static int et61x251_release(struct file *filp)
1299 {
1300 struct et61x251_device* cam;
1301
1302 down_write(&et61x251_dev_lock);
1303
1304 cam = video_drvdata(filp);
1305
1306 et61x251_stop_transfer(cam);
1307 et61x251_release_buffers(cam);
1308 cam->users--;
1309 wake_up_interruptible_nr(&cam->wait_open, 1);
1310
1311 DBG(3, "Video device %s closed",
1312 video_device_node_name(cam->v4ldev));
1313
1314 kref_put(&cam->kref, et61x251_release_resources);
1315
1316 up_write(&et61x251_dev_lock);
1317
1318 return 0;
1319 }
1320
1321
1322 static ssize_t
et61x251_read(struct file * filp,char __user * buf,size_t count,loff_t * f_pos)1323 et61x251_read(struct file* filp, char __user * buf,
1324 size_t count, loff_t* f_pos)
1325 {
1326 struct et61x251_device *cam = video_drvdata(filp);
1327 struct et61x251_frame_t* f, * i;
1328 unsigned long lock_flags;
1329 long timeout;
1330 int err = 0;
1331
1332 if (mutex_lock_interruptible(&cam->fileop_mutex))
1333 return -ERESTARTSYS;
1334
1335 if (cam->state & DEV_DISCONNECTED) {
1336 DBG(1, "Device not present");
1337 mutex_unlock(&cam->fileop_mutex);
1338 return -ENODEV;
1339 }
1340
1341 if (cam->state & DEV_MISCONFIGURED) {
1342 DBG(1, "The camera is misconfigured. Close and open it "
1343 "again.");
1344 mutex_unlock(&cam->fileop_mutex);
1345 return -EIO;
1346 }
1347
1348 if (cam->io == IO_MMAP) {
1349 DBG(3, "Close and open the device again to choose the read "
1350 "method");
1351 mutex_unlock(&cam->fileop_mutex);
1352 return -EBUSY;
1353 }
1354
1355 if (cam->io == IO_NONE) {
1356 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1357 IO_READ)) {
1358 DBG(1, "read() failed, not enough memory");
1359 mutex_unlock(&cam->fileop_mutex);
1360 return -ENOMEM;
1361 }
1362 cam->io = IO_READ;
1363 cam->stream = STREAM_ON;
1364 }
1365
1366 if (list_empty(&cam->inqueue)) {
1367 if (!list_empty(&cam->outqueue))
1368 et61x251_empty_framequeues(cam);
1369 et61x251_queue_unusedframes(cam);
1370 }
1371
1372 if (!count) {
1373 mutex_unlock(&cam->fileop_mutex);
1374 return 0;
1375 }
1376
1377 if (list_empty(&cam->outqueue)) {
1378 if (filp->f_flags & O_NONBLOCK) {
1379 mutex_unlock(&cam->fileop_mutex);
1380 return -EAGAIN;
1381 }
1382 timeout = wait_event_interruptible_timeout
1383 ( cam->wait_frame,
1384 (!list_empty(&cam->outqueue)) ||
1385 (cam->state & DEV_DISCONNECTED) ||
1386 (cam->state & DEV_MISCONFIGURED),
1387 msecs_to_jiffies(
1388 cam->module_param.frame_timeout * 1000
1389 )
1390 );
1391 if (timeout < 0) {
1392 mutex_unlock(&cam->fileop_mutex);
1393 return timeout;
1394 }
1395 if (cam->state & DEV_DISCONNECTED) {
1396 mutex_unlock(&cam->fileop_mutex);
1397 return -ENODEV;
1398 }
1399 if (!timeout || (cam->state & DEV_MISCONFIGURED)) {
1400 mutex_unlock(&cam->fileop_mutex);
1401 return -EIO;
1402 }
1403 }
1404
1405 f = list_entry(cam->outqueue.prev, struct et61x251_frame_t, frame);
1406
1407 if (count > f->buf.bytesused)
1408 count = f->buf.bytesused;
1409
1410 if (copy_to_user(buf, f->bufmem, count)) {
1411 err = -EFAULT;
1412 goto exit;
1413 }
1414 *f_pos += count;
1415
1416 exit:
1417 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1418 list_for_each_entry(i, &cam->outqueue, frame)
1419 i->state = F_UNUSED;
1420 INIT_LIST_HEAD(&cam->outqueue);
1421 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1422
1423 et61x251_queue_unusedframes(cam);
1424
1425 PDBGG("Frame #%lu, bytes read: %zu",
1426 (unsigned long)f->buf.index, count);
1427
1428 mutex_unlock(&cam->fileop_mutex);
1429
1430 return err ? err : count;
1431 }
1432
1433
et61x251_poll(struct file * filp,poll_table * wait)1434 static unsigned int et61x251_poll(struct file *filp, poll_table *wait)
1435 {
1436 struct et61x251_device *cam = video_drvdata(filp);
1437 struct et61x251_frame_t* f;
1438 unsigned long lock_flags;
1439 unsigned int mask = 0;
1440
1441 if (mutex_lock_interruptible(&cam->fileop_mutex))
1442 return POLLERR;
1443
1444 if (cam->state & DEV_DISCONNECTED) {
1445 DBG(1, "Device not present");
1446 goto error;
1447 }
1448
1449 if (cam->state & DEV_MISCONFIGURED) {
1450 DBG(1, "The camera is misconfigured. Close and open it "
1451 "again.");
1452 goto error;
1453 }
1454
1455 if (cam->io == IO_NONE) {
1456 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1457 IO_READ)) {
1458 DBG(1, "poll() failed, not enough memory");
1459 goto error;
1460 }
1461 cam->io = IO_READ;
1462 cam->stream = STREAM_ON;
1463 }
1464
1465 if (cam->io == IO_READ) {
1466 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1467 list_for_each_entry(f, &cam->outqueue, frame)
1468 f->state = F_UNUSED;
1469 INIT_LIST_HEAD(&cam->outqueue);
1470 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1471 et61x251_queue_unusedframes(cam);
1472 }
1473
1474 poll_wait(filp, &cam->wait_frame, wait);
1475
1476 if (!list_empty(&cam->outqueue))
1477 mask |= POLLIN | POLLRDNORM;
1478
1479 mutex_unlock(&cam->fileop_mutex);
1480
1481 return mask;
1482
1483 error:
1484 mutex_unlock(&cam->fileop_mutex);
1485 return POLLERR;
1486 }
1487
1488
et61x251_vm_open(struct vm_area_struct * vma)1489 static void et61x251_vm_open(struct vm_area_struct* vma)
1490 {
1491 struct et61x251_frame_t* f = vma->vm_private_data;
1492 f->vma_use_count++;
1493 }
1494
1495
et61x251_vm_close(struct vm_area_struct * vma)1496 static void et61x251_vm_close(struct vm_area_struct* vma)
1497 {
1498 /* NOTE: buffers are not freed here */
1499 struct et61x251_frame_t* f = vma->vm_private_data;
1500 f->vma_use_count--;
1501 }
1502
1503
1504 static const struct vm_operations_struct et61x251_vm_ops = {
1505 .open = et61x251_vm_open,
1506 .close = et61x251_vm_close,
1507 };
1508
1509
et61x251_mmap(struct file * filp,struct vm_area_struct * vma)1510 static int et61x251_mmap(struct file* filp, struct vm_area_struct *vma)
1511 {
1512 struct et61x251_device *cam = video_drvdata(filp);
1513 unsigned long size = vma->vm_end - vma->vm_start,
1514 start = vma->vm_start;
1515 void *pos;
1516 u32 i;
1517
1518 if (mutex_lock_interruptible(&cam->fileop_mutex))
1519 return -ERESTARTSYS;
1520
1521 if (cam->state & DEV_DISCONNECTED) {
1522 DBG(1, "Device not present");
1523 mutex_unlock(&cam->fileop_mutex);
1524 return -ENODEV;
1525 }
1526
1527 if (cam->state & DEV_MISCONFIGURED) {
1528 DBG(1, "The camera is misconfigured. Close and open it "
1529 "again.");
1530 mutex_unlock(&cam->fileop_mutex);
1531 return -EIO;
1532 }
1533
1534 if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
1535 mutex_unlock(&cam->fileop_mutex);
1536 return -EACCES;
1537 }
1538
1539 if (cam->io != IO_MMAP ||
1540 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
1541 mutex_unlock(&cam->fileop_mutex);
1542 return -EINVAL;
1543 }
1544
1545 for (i = 0; i < cam->nbuffers; i++) {
1546 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
1547 break;
1548 }
1549 if (i == cam->nbuffers) {
1550 mutex_unlock(&cam->fileop_mutex);
1551 return -EINVAL;
1552 }
1553
1554 vma->vm_flags |= VM_IO;
1555 vma->vm_flags |= VM_RESERVED;
1556
1557 pos = cam->frame[i].bufmem;
1558 while (size > 0) { /* size is page-aligned */
1559 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1560 mutex_unlock(&cam->fileop_mutex);
1561 return -EAGAIN;
1562 }
1563 start += PAGE_SIZE;
1564 pos += PAGE_SIZE;
1565 size -= PAGE_SIZE;
1566 }
1567
1568 vma->vm_ops = &et61x251_vm_ops;
1569 vma->vm_private_data = &cam->frame[i];
1570 et61x251_vm_open(vma);
1571
1572 mutex_unlock(&cam->fileop_mutex);
1573
1574 return 0;
1575 }
1576
1577 /*****************************************************************************/
1578
1579 static int
et61x251_vidioc_querycap(struct et61x251_device * cam,void __user * arg)1580 et61x251_vidioc_querycap(struct et61x251_device* cam, void __user * arg)
1581 {
1582 struct v4l2_capability cap = {
1583 .driver = "et61x251",
1584 .version = LINUX_VERSION_CODE,
1585 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1586 V4L2_CAP_STREAMING,
1587 };
1588
1589 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
1590 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
1591 strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
1592 sizeof(cap.bus_info));
1593
1594 if (copy_to_user(arg, &cap, sizeof(cap)))
1595 return -EFAULT;
1596
1597 return 0;
1598 }
1599
1600
1601 static int
et61x251_vidioc_enuminput(struct et61x251_device * cam,void __user * arg)1602 et61x251_vidioc_enuminput(struct et61x251_device* cam, void __user * arg)
1603 {
1604 struct v4l2_input i;
1605
1606 if (copy_from_user(&i, arg, sizeof(i)))
1607 return -EFAULT;
1608
1609 if (i.index)
1610 return -EINVAL;
1611
1612 memset(&i, 0, sizeof(i));
1613 strcpy(i.name, "Camera");
1614 i.type = V4L2_INPUT_TYPE_CAMERA;
1615 i.capabilities = V4L2_IN_CAP_STD;
1616
1617 if (copy_to_user(arg, &i, sizeof(i)))
1618 return -EFAULT;
1619
1620 return 0;
1621 }
1622
1623
1624 static int
et61x251_vidioc_g_input(struct et61x251_device * cam,void __user * arg)1625 et61x251_vidioc_g_input(struct et61x251_device* cam, void __user * arg)
1626 {
1627 int index = 0;
1628
1629 if (copy_to_user(arg, &index, sizeof(index)))
1630 return -EFAULT;
1631
1632 return 0;
1633 }
1634
1635
1636 static int
et61x251_vidioc_s_input(struct et61x251_device * cam,void __user * arg)1637 et61x251_vidioc_s_input(struct et61x251_device* cam, void __user * arg)
1638 {
1639 int index;
1640
1641 if (copy_from_user(&index, arg, sizeof(index)))
1642 return -EFAULT;
1643
1644 if (index != 0)
1645 return -EINVAL;
1646
1647 return 0;
1648 }
1649
1650
1651 static int
et61x251_vidioc_query_ctrl(struct et61x251_device * cam,void __user * arg)1652 et61x251_vidioc_query_ctrl(struct et61x251_device* cam, void __user * arg)
1653 {
1654 struct et61x251_sensor* s = &cam->sensor;
1655 struct v4l2_queryctrl qc;
1656 u8 i;
1657
1658 if (copy_from_user(&qc, arg, sizeof(qc)))
1659 return -EFAULT;
1660
1661 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1662 if (qc.id && qc.id == s->qctrl[i].id) {
1663 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1664 if (copy_to_user(arg, &qc, sizeof(qc)))
1665 return -EFAULT;
1666 return 0;
1667 }
1668
1669 return -EINVAL;
1670 }
1671
1672
1673 static int
et61x251_vidioc_g_ctrl(struct et61x251_device * cam,void __user * arg)1674 et61x251_vidioc_g_ctrl(struct et61x251_device* cam, void __user * arg)
1675 {
1676 struct et61x251_sensor* s = &cam->sensor;
1677 struct v4l2_control ctrl;
1678 int err = 0;
1679 u8 i;
1680
1681 if (!s->get_ctrl && !s->set_ctrl)
1682 return -EINVAL;
1683
1684 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1685 return -EFAULT;
1686
1687 if (!s->get_ctrl) {
1688 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1689 if (ctrl.id == s->qctrl[i].id) {
1690 ctrl.value = s->_qctrl[i].default_value;
1691 goto exit;
1692 }
1693 return -EINVAL;
1694 } else
1695 err = s->get_ctrl(cam, &ctrl);
1696
1697 exit:
1698 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1699 return -EFAULT;
1700
1701 return err;
1702 }
1703
1704
1705 static int
et61x251_vidioc_s_ctrl(struct et61x251_device * cam,void __user * arg)1706 et61x251_vidioc_s_ctrl(struct et61x251_device* cam, void __user * arg)
1707 {
1708 struct et61x251_sensor* s = &cam->sensor;
1709 struct v4l2_control ctrl;
1710 u8 i;
1711 int err = 0;
1712
1713 if (!s->set_ctrl)
1714 return -EINVAL;
1715
1716 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1717 return -EFAULT;
1718
1719 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++) {
1720 if (ctrl.id == s->qctrl[i].id) {
1721 if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
1722 return -EINVAL;
1723 if (ctrl.value < s->qctrl[i].minimum ||
1724 ctrl.value > s->qctrl[i].maximum)
1725 return -ERANGE;
1726 ctrl.value -= ctrl.value % s->qctrl[i].step;
1727 break;
1728 }
1729 }
1730 if (i == ARRAY_SIZE(s->qctrl))
1731 return -EINVAL;
1732 if ((err = s->set_ctrl(cam, &ctrl)))
1733 return err;
1734
1735 s->_qctrl[i].default_value = ctrl.value;
1736
1737 return 0;
1738 }
1739
1740
1741 static int
et61x251_vidioc_cropcap(struct et61x251_device * cam,void __user * arg)1742 et61x251_vidioc_cropcap(struct et61x251_device* cam, void __user * arg)
1743 {
1744 struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
1745
1746 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1747 cc->pixelaspect.numerator = 1;
1748 cc->pixelaspect.denominator = 1;
1749
1750 if (copy_to_user(arg, cc, sizeof(*cc)))
1751 return -EFAULT;
1752
1753 return 0;
1754 }
1755
1756
1757 static int
et61x251_vidioc_g_crop(struct et61x251_device * cam,void __user * arg)1758 et61x251_vidioc_g_crop(struct et61x251_device* cam, void __user * arg)
1759 {
1760 struct et61x251_sensor* s = &cam->sensor;
1761 struct v4l2_crop crop = {
1762 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1763 };
1764
1765 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1766
1767 if (copy_to_user(arg, &crop, sizeof(crop)))
1768 return -EFAULT;
1769
1770 return 0;
1771 }
1772
1773
1774 static int
et61x251_vidioc_s_crop(struct et61x251_device * cam,void __user * arg)1775 et61x251_vidioc_s_crop(struct et61x251_device* cam, void __user * arg)
1776 {
1777 struct et61x251_sensor* s = &cam->sensor;
1778 struct v4l2_crop crop;
1779 struct v4l2_rect* rect;
1780 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1781 struct v4l2_pix_format* pix_format = &(s->pix_format);
1782 u8 scale;
1783 const enum et61x251_stream_state stream = cam->stream;
1784 const u32 nbuffers = cam->nbuffers;
1785 u32 i;
1786 int err = 0;
1787
1788 if (copy_from_user(&crop, arg, sizeof(crop)))
1789 return -EFAULT;
1790
1791 rect = &(crop.c);
1792
1793 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1794 return -EINVAL;
1795
1796 if (cam->module_param.force_munmap)
1797 for (i = 0; i < cam->nbuffers; i++)
1798 if (cam->frame[i].vma_use_count) {
1799 DBG(3, "VIDIOC_S_CROP failed. "
1800 "Unmap the buffers first.");
1801 return -EBUSY;
1802 }
1803
1804 /* Preserve R,G or B origin */
1805 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
1806 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
1807
1808 if (rect->width < 16)
1809 rect->width = 16;
1810 if (rect->height < 16)
1811 rect->height = 16;
1812 if (rect->width > bounds->width)
1813 rect->width = bounds->width;
1814 if (rect->height > bounds->height)
1815 rect->height = bounds->height;
1816 if (rect->left < bounds->left)
1817 rect->left = bounds->left;
1818 if (rect->top < bounds->top)
1819 rect->top = bounds->top;
1820 if (rect->left + rect->width > bounds->left + bounds->width)
1821 rect->left = bounds->left+bounds->width - rect->width;
1822 if (rect->top + rect->height > bounds->top + bounds->height)
1823 rect->top = bounds->top+bounds->height - rect->height;
1824
1825 rect->width &= ~15L;
1826 rect->height &= ~15L;
1827
1828 if (ET61X251_PRESERVE_IMGSCALE) {
1829 /* Calculate the actual scaling factor */
1830 u32 a, b;
1831 a = rect->width * rect->height;
1832 b = pix_format->width * pix_format->height;
1833 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1834 } else
1835 scale = 1;
1836
1837 if (cam->stream == STREAM_ON)
1838 if ((err = et61x251_stream_interrupt(cam)))
1839 return err;
1840
1841 if (copy_to_user(arg, &crop, sizeof(crop))) {
1842 cam->stream = stream;
1843 return -EFAULT;
1844 }
1845
1846 if (cam->module_param.force_munmap || cam->io == IO_READ)
1847 et61x251_release_buffers(cam);
1848
1849 err = et61x251_set_crop(cam, rect);
1850 if (s->set_crop)
1851 err += s->set_crop(cam, rect);
1852 err += et61x251_set_scale(cam, scale);
1853
1854 if (err) { /* atomic, no rollback in ioctl() */
1855 cam->state |= DEV_MISCONFIGURED;
1856 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
1857 "use the camera, close and open %s again.",
1858 video_device_node_name(cam->v4ldev));
1859 return -EIO;
1860 }
1861
1862 s->pix_format.width = rect->width/scale;
1863 s->pix_format.height = rect->height/scale;
1864 memcpy(&(s->_rect), rect, sizeof(*rect));
1865
1866 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1867 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1868 cam->state |= DEV_MISCONFIGURED;
1869 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
1870 "use the camera, close and open %s again.",
1871 video_device_node_name(cam->v4ldev));
1872 return -ENOMEM;
1873 }
1874
1875 if (cam->io == IO_READ)
1876 et61x251_empty_framequeues(cam);
1877 else if (cam->module_param.force_munmap)
1878 et61x251_requeue_outqueue(cam);
1879
1880 cam->stream = stream;
1881
1882 return 0;
1883 }
1884
1885
1886 static int
et61x251_vidioc_enum_framesizes(struct et61x251_device * cam,void __user * arg)1887 et61x251_vidioc_enum_framesizes(struct et61x251_device* cam, void __user * arg)
1888 {
1889 struct v4l2_frmsizeenum frmsize;
1890
1891 if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
1892 return -EFAULT;
1893
1894 if (frmsize.index != 0)
1895 return -EINVAL;
1896
1897 if (frmsize.pixel_format != V4L2_PIX_FMT_ET61X251 &&
1898 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
1899 return -EINVAL;
1900
1901 frmsize.type = V4L2_FRMSIZE_TYPE_STEPWISE;
1902 frmsize.stepwise.min_width = frmsize.stepwise.step_width = 16;
1903 frmsize.stepwise.min_height = frmsize.stepwise.step_height = 16;
1904 frmsize.stepwise.max_width = cam->sensor.cropcap.bounds.width;
1905 frmsize.stepwise.max_height = cam->sensor.cropcap.bounds.height;
1906 memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
1907
1908 if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
1909 return -EFAULT;
1910
1911 return 0;
1912 }
1913
1914
1915 static int
et61x251_vidioc_enum_fmt(struct et61x251_device * cam,void __user * arg)1916 et61x251_vidioc_enum_fmt(struct et61x251_device* cam, void __user * arg)
1917 {
1918 struct v4l2_fmtdesc fmtd;
1919
1920 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
1921 return -EFAULT;
1922
1923 if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1924 return -EINVAL;
1925
1926 if (fmtd.index == 0) {
1927 strcpy(fmtd.description, "bayer rgb");
1928 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
1929 } else if (fmtd.index == 1) {
1930 strcpy(fmtd.description, "compressed");
1931 fmtd.pixelformat = V4L2_PIX_FMT_ET61X251;
1932 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
1933 } else
1934 return -EINVAL;
1935
1936 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1937 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1938
1939 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
1940 return -EFAULT;
1941
1942 return 0;
1943 }
1944
1945
1946 static int
et61x251_vidioc_g_fmt(struct et61x251_device * cam,void __user * arg)1947 et61x251_vidioc_g_fmt(struct et61x251_device* cam, void __user * arg)
1948 {
1949 struct v4l2_format format;
1950 struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
1951
1952 if (copy_from_user(&format, arg, sizeof(format)))
1953 return -EFAULT;
1954
1955 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1956 return -EINVAL;
1957
1958 pfmt->colorspace = (pfmt->pixelformat == V4L2_PIX_FMT_ET61X251) ?
1959 0 : V4L2_COLORSPACE_SRGB;
1960 pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_ET61X251)
1961 ? 0 : (pfmt->width * pfmt->priv) / 8;
1962 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
1963 pfmt->field = V4L2_FIELD_NONE;
1964 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1965
1966 if (copy_to_user(arg, &format, sizeof(format)))
1967 return -EFAULT;
1968
1969 return 0;
1970 }
1971
1972
1973 static int
et61x251_vidioc_try_s_fmt(struct et61x251_device * cam,unsigned int cmd,void __user * arg)1974 et61x251_vidioc_try_s_fmt(struct et61x251_device* cam, unsigned int cmd,
1975 void __user * arg)
1976 {
1977 struct et61x251_sensor* s = &cam->sensor;
1978 struct v4l2_format format;
1979 struct v4l2_pix_format* pix;
1980 struct v4l2_pix_format* pfmt = &(s->pix_format);
1981 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1982 struct v4l2_rect rect;
1983 u8 scale;
1984 const enum et61x251_stream_state stream = cam->stream;
1985 const u32 nbuffers = cam->nbuffers;
1986 u32 i;
1987 int err = 0;
1988
1989 if (copy_from_user(&format, arg, sizeof(format)))
1990 return -EFAULT;
1991
1992 pix = &(format.fmt.pix);
1993
1994 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1995 return -EINVAL;
1996
1997 memcpy(&rect, &(s->_rect), sizeof(rect));
1998
1999 { /* calculate the actual scaling factor */
2000 u32 a, b;
2001 a = rect.width * rect.height;
2002 b = pix->width * pix->height;
2003 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
2004 }
2005
2006 rect.width = scale * pix->width;
2007 rect.height = scale * pix->height;
2008
2009 if (rect.width < 16)
2010 rect.width = 16;
2011 if (rect.height < 16)
2012 rect.height = 16;
2013 if (rect.width > bounds->left + bounds->width - rect.left)
2014 rect.width = bounds->left + bounds->width - rect.left;
2015 if (rect.height > bounds->top + bounds->height - rect.top)
2016 rect.height = bounds->top + bounds->height - rect.top;
2017
2018 rect.width &= ~15L;
2019 rect.height &= ~15L;
2020
2021 { /* adjust the scaling factor */
2022 u32 a, b;
2023 a = rect.width * rect.height;
2024 b = pix->width * pix->height;
2025 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
2026 }
2027
2028 pix->width = rect.width / scale;
2029 pix->height = rect.height / scale;
2030
2031 if (pix->pixelformat != V4L2_PIX_FMT_ET61X251 &&
2032 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2033 pix->pixelformat = pfmt->pixelformat;
2034 pix->priv = pfmt->priv; /* bpp */
2035 pix->colorspace = (pix->pixelformat == V4L2_PIX_FMT_ET61X251) ?
2036 0 : V4L2_COLORSPACE_SRGB;
2037 pix->colorspace = pfmt->colorspace;
2038 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
2039 ? 0 : (pix->width * pix->priv) / 8;
2040 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
2041 pix->field = V4L2_FIELD_NONE;
2042
2043 if (cmd == VIDIOC_TRY_FMT) {
2044 if (copy_to_user(arg, &format, sizeof(format)))
2045 return -EFAULT;
2046 return 0;
2047 }
2048
2049 if (cam->module_param.force_munmap)
2050 for (i = 0; i < cam->nbuffers; i++)
2051 if (cam->frame[i].vma_use_count) {
2052 DBG(3, "VIDIOC_S_FMT failed. "
2053 "Unmap the buffers first.");
2054 return -EBUSY;
2055 }
2056
2057 if (cam->stream == STREAM_ON)
2058 if ((err = et61x251_stream_interrupt(cam)))
2059 return err;
2060
2061 if (copy_to_user(arg, &format, sizeof(format))) {
2062 cam->stream = stream;
2063 return -EFAULT;
2064 }
2065
2066 if (cam->module_param.force_munmap || cam->io == IO_READ)
2067 et61x251_release_buffers(cam);
2068
2069 err += et61x251_set_pix_format(cam, pix);
2070 err += et61x251_set_crop(cam, &rect);
2071 if (s->set_pix_format)
2072 err += s->set_pix_format(cam, pix);
2073 if (s->set_crop)
2074 err += s->set_crop(cam, &rect);
2075 err += et61x251_set_scale(cam, scale);
2076
2077 if (err) { /* atomic, no rollback in ioctl() */
2078 cam->state |= DEV_MISCONFIGURED;
2079 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
2080 "use the camera, close and open %s again.",
2081 video_device_node_name(cam->v4ldev));
2082 return -EIO;
2083 }
2084
2085 memcpy(pfmt, pix, sizeof(*pix));
2086 memcpy(&(s->_rect), &rect, sizeof(rect));
2087
2088 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2089 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
2090 cam->state |= DEV_MISCONFIGURED;
2091 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2092 "use the camera, close and open %s again.",
2093 video_device_node_name(cam->v4ldev));
2094 return -ENOMEM;
2095 }
2096
2097 if (cam->io == IO_READ)
2098 et61x251_empty_framequeues(cam);
2099 else if (cam->module_param.force_munmap)
2100 et61x251_requeue_outqueue(cam);
2101
2102 cam->stream = stream;
2103
2104 return 0;
2105 }
2106
2107
2108 static int
et61x251_vidioc_g_jpegcomp(struct et61x251_device * cam,void __user * arg)2109 et61x251_vidioc_g_jpegcomp(struct et61x251_device* cam, void __user * arg)
2110 {
2111 if (copy_to_user(arg, &cam->compression,
2112 sizeof(cam->compression)))
2113 return -EFAULT;
2114
2115 return 0;
2116 }
2117
2118
2119 static int
et61x251_vidioc_s_jpegcomp(struct et61x251_device * cam,void __user * arg)2120 et61x251_vidioc_s_jpegcomp(struct et61x251_device* cam, void __user * arg)
2121 {
2122 struct v4l2_jpegcompression jc;
2123 const enum et61x251_stream_state stream = cam->stream;
2124 int err = 0;
2125
2126 if (copy_from_user(&jc, arg, sizeof(jc)))
2127 return -EFAULT;
2128
2129 if (jc.quality != 0 && jc.quality != 1)
2130 return -EINVAL;
2131
2132 if (cam->stream == STREAM_ON)
2133 if ((err = et61x251_stream_interrupt(cam)))
2134 return err;
2135
2136 err += et61x251_set_compression(cam, &jc);
2137 if (err) { /* atomic, no rollback in ioctl() */
2138 cam->state |= DEV_MISCONFIGURED;
2139 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2140 "problems. To use the camera, close and open "
2141 "%s again.", video_device_node_name(cam->v4ldev));
2142 return -EIO;
2143 }
2144
2145 cam->compression.quality = jc.quality;
2146
2147 cam->stream = stream;
2148
2149 return 0;
2150 }
2151
2152
2153 static int
et61x251_vidioc_reqbufs(struct et61x251_device * cam,void __user * arg)2154 et61x251_vidioc_reqbufs(struct et61x251_device* cam, void __user * arg)
2155 {
2156 struct v4l2_requestbuffers rb;
2157 u32 i;
2158 int err;
2159
2160 if (copy_from_user(&rb, arg, sizeof(rb)))
2161 return -EFAULT;
2162
2163 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2164 rb.memory != V4L2_MEMORY_MMAP)
2165 return -EINVAL;
2166
2167 if (cam->io == IO_READ) {
2168 DBG(3, "Close and open the device again to choose the mmap "
2169 "I/O method");
2170 return -EBUSY;
2171 }
2172
2173 for (i = 0; i < cam->nbuffers; i++)
2174 if (cam->frame[i].vma_use_count) {
2175 DBG(3, "VIDIOC_REQBUFS failed. "
2176 "Previous buffers are still mapped.");
2177 return -EBUSY;
2178 }
2179
2180 if (cam->stream == STREAM_ON)
2181 if ((err = et61x251_stream_interrupt(cam)))
2182 return err;
2183
2184 et61x251_empty_framequeues(cam);
2185
2186 et61x251_release_buffers(cam);
2187 if (rb.count)
2188 rb.count = et61x251_request_buffers(cam, rb.count, IO_MMAP);
2189
2190 if (copy_to_user(arg, &rb, sizeof(rb))) {
2191 et61x251_release_buffers(cam);
2192 cam->io = IO_NONE;
2193 return -EFAULT;
2194 }
2195
2196 cam->io = rb.count ? IO_MMAP : IO_NONE;
2197
2198 return 0;
2199 }
2200
2201
2202 static int
et61x251_vidioc_querybuf(struct et61x251_device * cam,void __user * arg)2203 et61x251_vidioc_querybuf(struct et61x251_device* cam, void __user * arg)
2204 {
2205 struct v4l2_buffer b;
2206
2207 if (copy_from_user(&b, arg, sizeof(b)))
2208 return -EFAULT;
2209
2210 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2211 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2212 return -EINVAL;
2213
2214 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2215
2216 if (cam->frame[b.index].vma_use_count)
2217 b.flags |= V4L2_BUF_FLAG_MAPPED;
2218
2219 if (cam->frame[b.index].state == F_DONE)
2220 b.flags |= V4L2_BUF_FLAG_DONE;
2221 else if (cam->frame[b.index].state != F_UNUSED)
2222 b.flags |= V4L2_BUF_FLAG_QUEUED;
2223
2224 if (copy_to_user(arg, &b, sizeof(b)))
2225 return -EFAULT;
2226
2227 return 0;
2228 }
2229
2230
2231 static int
et61x251_vidioc_qbuf(struct et61x251_device * cam,void __user * arg)2232 et61x251_vidioc_qbuf(struct et61x251_device* cam, void __user * arg)
2233 {
2234 struct v4l2_buffer b;
2235 unsigned long lock_flags;
2236
2237 if (copy_from_user(&b, arg, sizeof(b)))
2238 return -EFAULT;
2239
2240 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2241 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2242 return -EINVAL;
2243
2244 if (cam->frame[b.index].state != F_UNUSED)
2245 return -EINVAL;
2246
2247 cam->frame[b.index].state = F_QUEUED;
2248
2249 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2250 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2251 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2252
2253 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2254
2255 return 0;
2256 }
2257
2258
2259 static int
et61x251_vidioc_dqbuf(struct et61x251_device * cam,struct file * filp,void __user * arg)2260 et61x251_vidioc_dqbuf(struct et61x251_device* cam, struct file* filp,
2261 void __user * arg)
2262 {
2263 struct v4l2_buffer b;
2264 struct et61x251_frame_t *f;
2265 unsigned long lock_flags;
2266 long timeout;
2267
2268 if (copy_from_user(&b, arg, sizeof(b)))
2269 return -EFAULT;
2270
2271 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
2272 return -EINVAL;
2273
2274 if (list_empty(&cam->outqueue)) {
2275 if (cam->stream == STREAM_OFF)
2276 return -EINVAL;
2277 if (filp->f_flags & O_NONBLOCK)
2278 return -EAGAIN;
2279 timeout = wait_event_interruptible_timeout
2280 ( cam->wait_frame,
2281 (!list_empty(&cam->outqueue)) ||
2282 (cam->state & DEV_DISCONNECTED) ||
2283 (cam->state & DEV_MISCONFIGURED),
2284 cam->module_param.frame_timeout *
2285 1000 * msecs_to_jiffies(1) );
2286 if (timeout < 0)
2287 return timeout;
2288 if (cam->state & DEV_DISCONNECTED)
2289 return -ENODEV;
2290 if (!timeout || (cam->state & DEV_MISCONFIGURED))
2291 return -EIO;
2292 }
2293
2294 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2295 f = list_entry(cam->outqueue.next, struct et61x251_frame_t, frame);
2296 list_del(cam->outqueue.next);
2297 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2298
2299 f->state = F_UNUSED;
2300
2301 memcpy(&b, &f->buf, sizeof(b));
2302 if (f->vma_use_count)
2303 b.flags |= V4L2_BUF_FLAG_MAPPED;
2304
2305 if (copy_to_user(arg, &b, sizeof(b)))
2306 return -EFAULT;
2307
2308 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2309
2310 return 0;
2311 }
2312
2313
2314 static int
et61x251_vidioc_streamon(struct et61x251_device * cam,void __user * arg)2315 et61x251_vidioc_streamon(struct et61x251_device* cam, void __user * arg)
2316 {
2317 int type;
2318
2319 if (copy_from_user(&type, arg, sizeof(type)))
2320 return -EFAULT;
2321
2322 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2323 return -EINVAL;
2324
2325 cam->stream = STREAM_ON;
2326
2327 DBG(3, "Stream on");
2328
2329 return 0;
2330 }
2331
2332
2333 static int
et61x251_vidioc_streamoff(struct et61x251_device * cam,void __user * arg)2334 et61x251_vidioc_streamoff(struct et61x251_device* cam, void __user * arg)
2335 {
2336 int type, err;
2337
2338 if (copy_from_user(&type, arg, sizeof(type)))
2339 return -EFAULT;
2340
2341 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2342 return -EINVAL;
2343
2344 if (cam->stream == STREAM_ON)
2345 if ((err = et61x251_stream_interrupt(cam)))
2346 return err;
2347
2348 et61x251_empty_framequeues(cam);
2349
2350 DBG(3, "Stream off");
2351
2352 return 0;
2353 }
2354
2355
2356 static int
et61x251_vidioc_g_parm(struct et61x251_device * cam,void __user * arg)2357 et61x251_vidioc_g_parm(struct et61x251_device* cam, void __user * arg)
2358 {
2359 struct v4l2_streamparm sp;
2360
2361 if (copy_from_user(&sp, arg, sizeof(sp)))
2362 return -EFAULT;
2363
2364 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2365 return -EINVAL;
2366
2367 sp.parm.capture.extendedmode = 0;
2368 sp.parm.capture.readbuffers = cam->nreadbuffers;
2369
2370 if (copy_to_user(arg, &sp, sizeof(sp)))
2371 return -EFAULT;
2372
2373 return 0;
2374 }
2375
2376
2377 static int
et61x251_vidioc_s_parm(struct et61x251_device * cam,void __user * arg)2378 et61x251_vidioc_s_parm(struct et61x251_device* cam, void __user * arg)
2379 {
2380 struct v4l2_streamparm sp;
2381
2382 if (copy_from_user(&sp, arg, sizeof(sp)))
2383 return -EFAULT;
2384
2385 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2386 return -EINVAL;
2387
2388 sp.parm.capture.extendedmode = 0;
2389
2390 if (sp.parm.capture.readbuffers == 0)
2391 sp.parm.capture.readbuffers = cam->nreadbuffers;
2392
2393 if (sp.parm.capture.readbuffers > ET61X251_MAX_FRAMES)
2394 sp.parm.capture.readbuffers = ET61X251_MAX_FRAMES;
2395
2396 if (copy_to_user(arg, &sp, sizeof(sp)))
2397 return -EFAULT;
2398
2399 cam->nreadbuffers = sp.parm.capture.readbuffers;
2400
2401 return 0;
2402 }
2403
2404
et61x251_ioctl_v4l2(struct file * filp,unsigned int cmd,void __user * arg)2405 static long et61x251_ioctl_v4l2(struct file *filp,
2406 unsigned int cmd, void __user *arg)
2407 {
2408 struct et61x251_device *cam = video_drvdata(filp);
2409
2410 switch (cmd) {
2411
2412 case VIDIOC_QUERYCAP:
2413 return et61x251_vidioc_querycap(cam, arg);
2414
2415 case VIDIOC_ENUMINPUT:
2416 return et61x251_vidioc_enuminput(cam, arg);
2417
2418 case VIDIOC_G_INPUT:
2419 return et61x251_vidioc_g_input(cam, arg);
2420
2421 case VIDIOC_S_INPUT:
2422 return et61x251_vidioc_s_input(cam, arg);
2423
2424 case VIDIOC_QUERYCTRL:
2425 return et61x251_vidioc_query_ctrl(cam, arg);
2426
2427 case VIDIOC_G_CTRL:
2428 return et61x251_vidioc_g_ctrl(cam, arg);
2429
2430 case VIDIOC_S_CTRL:
2431 return et61x251_vidioc_s_ctrl(cam, arg);
2432
2433 case VIDIOC_CROPCAP:
2434 return et61x251_vidioc_cropcap(cam, arg);
2435
2436 case VIDIOC_G_CROP:
2437 return et61x251_vidioc_g_crop(cam, arg);
2438
2439 case VIDIOC_S_CROP:
2440 return et61x251_vidioc_s_crop(cam, arg);
2441
2442 case VIDIOC_ENUM_FMT:
2443 return et61x251_vidioc_enum_fmt(cam, arg);
2444
2445 case VIDIOC_G_FMT:
2446 return et61x251_vidioc_g_fmt(cam, arg);
2447
2448 case VIDIOC_TRY_FMT:
2449 case VIDIOC_S_FMT:
2450 return et61x251_vidioc_try_s_fmt(cam, cmd, arg);
2451
2452 case VIDIOC_ENUM_FRAMESIZES:
2453 return et61x251_vidioc_enum_framesizes(cam, arg);
2454
2455 case VIDIOC_G_JPEGCOMP:
2456 return et61x251_vidioc_g_jpegcomp(cam, arg);
2457
2458 case VIDIOC_S_JPEGCOMP:
2459 return et61x251_vidioc_s_jpegcomp(cam, arg);
2460
2461 case VIDIOC_REQBUFS:
2462 return et61x251_vidioc_reqbufs(cam, arg);
2463
2464 case VIDIOC_QUERYBUF:
2465 return et61x251_vidioc_querybuf(cam, arg);
2466
2467 case VIDIOC_QBUF:
2468 return et61x251_vidioc_qbuf(cam, arg);
2469
2470 case VIDIOC_DQBUF:
2471 return et61x251_vidioc_dqbuf(cam, filp, arg);
2472
2473 case VIDIOC_STREAMON:
2474 return et61x251_vidioc_streamon(cam, arg);
2475
2476 case VIDIOC_STREAMOFF:
2477 return et61x251_vidioc_streamoff(cam, arg);
2478
2479 case VIDIOC_G_PARM:
2480 return et61x251_vidioc_g_parm(cam, arg);
2481
2482 case VIDIOC_S_PARM:
2483 return et61x251_vidioc_s_parm(cam, arg);
2484
2485 default:
2486 return -ENOTTY;
2487
2488 }
2489 }
2490
2491
et61x251_ioctl(struct file * filp,unsigned int cmd,unsigned long arg)2492 static long et61x251_ioctl(struct file *filp,
2493 unsigned int cmd, unsigned long arg)
2494 {
2495 struct et61x251_device *cam = video_drvdata(filp);
2496 long err = 0;
2497
2498 if (mutex_lock_interruptible(&cam->fileop_mutex))
2499 return -ERESTARTSYS;
2500
2501 if (cam->state & DEV_DISCONNECTED) {
2502 DBG(1, "Device not present");
2503 mutex_unlock(&cam->fileop_mutex);
2504 return -ENODEV;
2505 }
2506
2507 if (cam->state & DEV_MISCONFIGURED) {
2508 DBG(1, "The camera is misconfigured. Close and open it "
2509 "again.");
2510 mutex_unlock(&cam->fileop_mutex);
2511 return -EIO;
2512 }
2513
2514 V4LDBG(3, "et61x251", cmd);
2515
2516 err = et61x251_ioctl_v4l2(filp, cmd, (void __user *)arg);
2517
2518 mutex_unlock(&cam->fileop_mutex);
2519
2520 return err;
2521 }
2522
2523
2524 static const struct v4l2_file_operations et61x251_fops = {
2525 .owner = THIS_MODULE,
2526 .open = et61x251_open,
2527 .release = et61x251_release,
2528 .unlocked_ioctl = et61x251_ioctl,
2529 .read = et61x251_read,
2530 .poll = et61x251_poll,
2531 .mmap = et61x251_mmap,
2532 };
2533
2534 /*****************************************************************************/
2535
2536 /* It exists a single interface only. We do not need to validate anything. */
2537 static int
et61x251_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)2538 et61x251_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
2539 {
2540 struct usb_device *udev = interface_to_usbdev(intf);
2541 struct et61x251_device* cam;
2542 static unsigned int dev_nr;
2543 unsigned int i;
2544 int err = 0;
2545
2546 if (!(cam = kzalloc(sizeof(struct et61x251_device), GFP_KERNEL)))
2547 return -ENOMEM;
2548
2549 cam->usbdev = udev;
2550
2551 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
2552 DBG(1, "kmalloc() failed");
2553 err = -ENOMEM;
2554 goto fail;
2555 }
2556
2557 if (!(cam->v4ldev = video_device_alloc())) {
2558 DBG(1, "video_device_alloc() failed");
2559 err = -ENOMEM;
2560 goto fail;
2561 }
2562
2563 DBG(2, "ET61X[12]51 PC Camera Controller detected "
2564 "(vid/pid 0x%04X:0x%04X)",id->idVendor, id->idProduct);
2565
2566 for (i = 0; et61x251_sensor_table[i]; i++) {
2567 err = et61x251_sensor_table[i](cam);
2568 if (!err)
2569 break;
2570 }
2571
2572 if (!err)
2573 DBG(2, "%s image sensor detected", cam->sensor.name);
2574 else {
2575 DBG(1, "No supported image sensor detected");
2576 err = -ENODEV;
2577 goto fail;
2578 }
2579
2580 if (et61x251_init(cam)) {
2581 DBG(1, "Initialization failed. I will retry on open().");
2582 cam->state |= DEV_MISCONFIGURED;
2583 }
2584
2585 strcpy(cam->v4ldev->name, "ET61X[12]51 PC Camera");
2586 cam->v4ldev->fops = &et61x251_fops;
2587 cam->v4ldev->release = video_device_release;
2588 cam->v4ldev->parent = &udev->dev;
2589 video_set_drvdata(cam->v4ldev, cam);
2590
2591 init_completion(&cam->probe);
2592
2593 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
2594 video_nr[dev_nr]);
2595 if (err) {
2596 DBG(1, "V4L2 device registration failed");
2597 if (err == -ENFILE && video_nr[dev_nr] == -1)
2598 DBG(1, "Free /dev/videoX node not found");
2599 video_nr[dev_nr] = -1;
2600 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2601 complete_all(&cam->probe);
2602 goto fail;
2603 }
2604
2605 DBG(2, "V4L2 device registered as %s",
2606 video_device_node_name(cam->v4ldev));
2607
2608 cam->module_param.force_munmap = force_munmap[dev_nr];
2609 cam->module_param.frame_timeout = frame_timeout[dev_nr];
2610
2611 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2612
2613 #ifdef CONFIG_VIDEO_ADV_DEBUG
2614 err = et61x251_create_sysfs(cam);
2615 if (!err)
2616 DBG(2, "Optional device control through 'sysfs' "
2617 "interface ready");
2618 else
2619 DBG(2, "Failed to create 'sysfs' interface for optional "
2620 "device controlling. Error #%d", err);
2621 #else
2622 DBG(2, "Optional device control through 'sysfs' interface disabled");
2623 DBG(3, "Compile the kernel with the 'CONFIG_VIDEO_ADV_DEBUG' "
2624 "configuration option to enable it.");
2625 #endif
2626
2627 usb_set_intfdata(intf, cam);
2628 kref_init(&cam->kref);
2629 usb_get_dev(cam->usbdev);
2630
2631 complete_all(&cam->probe);
2632
2633 return 0;
2634
2635 fail:
2636 if (cam) {
2637 kfree(cam->control_buffer);
2638 if (cam->v4ldev)
2639 video_device_release(cam->v4ldev);
2640 kfree(cam);
2641 }
2642 return err;
2643 }
2644
2645
et61x251_usb_disconnect(struct usb_interface * intf)2646 static void et61x251_usb_disconnect(struct usb_interface* intf)
2647 {
2648 struct et61x251_device* cam;
2649
2650 down_write(&et61x251_dev_lock);
2651
2652 cam = usb_get_intfdata(intf);
2653
2654 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
2655
2656 if (cam->users) {
2657 DBG(2, "Device %s is open! Deregistration and memory "
2658 "deallocation are deferred.",
2659 video_device_node_name(cam->v4ldev));
2660 cam->state |= DEV_MISCONFIGURED;
2661 et61x251_stop_transfer(cam);
2662 cam->state |= DEV_DISCONNECTED;
2663 wake_up_interruptible(&cam->wait_frame);
2664 wake_up(&cam->wait_stream);
2665 } else
2666 cam->state |= DEV_DISCONNECTED;
2667
2668 wake_up_interruptible_all(&cam->wait_open);
2669
2670 kref_put(&cam->kref, et61x251_release_resources);
2671
2672 up_write(&et61x251_dev_lock);
2673 }
2674
2675
2676 static struct usb_driver et61x251_usb_driver = {
2677 .name = "et61x251",
2678 .id_table = et61x251_id_table,
2679 .probe = et61x251_usb_probe,
2680 .disconnect = et61x251_usb_disconnect,
2681 };
2682
2683 module_usb_driver(et61x251_usb_driver);
2684