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V4L/DVB (10138): v4l2-ioctl: change to long return type to match unlocked_ioctl.
[deliverable/linux.git] / drivers / media / video / et61x251 / et61x251_core.c
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 #include <linux/module.h>
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/param.h>
25 #include <linux/errno.h>
26 #include <linux/slab.h>
27 #include <linux/device.h>
28 #include <linux/fs.h>
29 #include <linux/delay.h>
30 #include <linux/compiler.h>
31 #include <linux/ioctl.h>
32 #include <linux/poll.h>
33 #include <linux/stat.h>
34 #include <linux/mm.h>
35 #include <linux/vmalloc.h>
36 #include <linux/page-flags.h>
37 #include <media/v4l2-ioctl.h>
38 #include <asm/byteorder.h>
39 #include <asm/page.h>
40 #include <asm/uaccess.h>
41
42 #include "et61x251.h"
43
44 /*****************************************************************************/
45
46 #define ET61X251_MODULE_NAME "V4L2 driver for ET61X[12]51 " \
47 "PC Camera Controllers"
48 #define ET61X251_MODULE_AUTHOR "(C) 2006-2007 Luca Risolia"
49 #define ET61X251_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
50 #define ET61X251_MODULE_LICENSE "GPL"
51 #define ET61X251_MODULE_VERSION "1:1.09"
52 #define ET61X251_MODULE_VERSION_CODE KERNEL_VERSION(1, 1, 9)
53
54 /*****************************************************************************/
55
56 MODULE_DEVICE_TABLE(usb, et61x251_id_table);
57
58 MODULE_AUTHOR(ET61X251_MODULE_AUTHOR " " ET61X251_AUTHOR_EMAIL);
59 MODULE_DESCRIPTION(ET61X251_MODULE_NAME);
60 MODULE_VERSION(ET61X251_MODULE_VERSION);
61 MODULE_LICENSE(ET61X251_MODULE_LICENSE);
62
63 static short video_nr[] = {[0 ... ET61X251_MAX_DEVICES-1] = -1};
64 module_param_array(video_nr, short, NULL, 0444);
65 MODULE_PARM_DESC(video_nr,
66 "\n<-1|n[,...]> Specify V4L2 minor mode number."
67 "\n -1 = use next available (default)"
68 "\n n = use minor number n (integer >= 0)"
69 "\nYou can specify up to "
70 __MODULE_STRING(ET61X251_MAX_DEVICES) " cameras this way."
71 "\nFor example:"
72 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
73 "\nthe second registered camera and use auto for the first"
74 "\none and for every other camera."
75 "\n");
76
77 static short force_munmap[] = {[0 ... ET61X251_MAX_DEVICES-1] =
78 ET61X251_FORCE_MUNMAP};
79 module_param_array(force_munmap, bool, NULL, 0444);
80 MODULE_PARM_DESC(force_munmap,
81 "\n<0|1[,...]> Force the application to unmap previously"
82 "\nmapped buffer memory before calling any VIDIOC_S_CROP or"
83 "\nVIDIOC_S_FMT ioctl's. Not all the applications support"
84 "\nthis feature. This parameter is specific for each"
85 "\ndetected camera."
86 "\n 0 = do not force memory unmapping"
87 "\n 1 = force memory unmapping (save memory)"
88 "\nDefault value is "__MODULE_STRING(ET61X251_FORCE_MUNMAP)"."
89 "\n");
90
91 static unsigned int frame_timeout[] = {[0 ... ET61X251_MAX_DEVICES-1] =
92 ET61X251_FRAME_TIMEOUT};
93 module_param_array(frame_timeout, uint, NULL, 0644);
94 MODULE_PARM_DESC(frame_timeout,
95 "\n<n[,...]> Timeout for a video frame in seconds."
96 "\nThis parameter is specific for each detected camera."
97 "\nDefault value is "
98 __MODULE_STRING(ET61X251_FRAME_TIMEOUT)"."
99 "\n");
100
101 #ifdef ET61X251_DEBUG
102 static unsigned short debug = ET61X251_DEBUG_LEVEL;
103 module_param(debug, ushort, 0644);
104 MODULE_PARM_DESC(debug,
105 "\n<n> Debugging information level, from 0 to 3:"
106 "\n0 = none (use carefully)"
107 "\n1 = critical errors"
108 "\n2 = significant informations"
109 "\n3 = more verbose messages"
110 "\nLevel 3 is useful for testing only, when only "
111 "one device is used."
112 "\nDefault value is "__MODULE_STRING(ET61X251_DEBUG_LEVEL)"."
113 "\n");
114 #endif
115
116 /*****************************************************************************/
117
118 static u32
119 et61x251_request_buffers(struct et61x251_device* cam, u32 count,
120 enum et61x251_io_method io)
121 {
122 struct v4l2_pix_format* p = &(cam->sensor.pix_format);
123 struct v4l2_rect* r = &(cam->sensor.cropcap.bounds);
124 const size_t imagesize = cam->module_param.force_munmap ||
125 io == IO_READ ?
126 (p->width * p->height * p->priv) / 8 :
127 (r->width * r->height * p->priv) / 8;
128 void* buff = NULL;
129 u32 i;
130
131 if (count > ET61X251_MAX_FRAMES)
132 count = ET61X251_MAX_FRAMES;
133
134 cam->nbuffers = count;
135 while (cam->nbuffers > 0) {
136 if ((buff = vmalloc_32_user(cam->nbuffers *
137 PAGE_ALIGN(imagesize))))
138 break;
139 cam->nbuffers--;
140 }
141
142 for (i = 0; i < cam->nbuffers; i++) {
143 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
144 cam->frame[i].buf.index = i;
145 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
146 cam->frame[i].buf.length = imagesize;
147 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
148 cam->frame[i].buf.sequence = 0;
149 cam->frame[i].buf.field = V4L2_FIELD_NONE;
150 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
151 cam->frame[i].buf.flags = 0;
152 }
153
154 return cam->nbuffers;
155 }
156
157
158 static void et61x251_release_buffers(struct et61x251_device* cam)
159 {
160 if (cam->nbuffers) {
161 vfree(cam->frame[0].bufmem);
162 cam->nbuffers = 0;
163 }
164 cam->frame_current = NULL;
165 }
166
167
168 static void et61x251_empty_framequeues(struct et61x251_device* cam)
169 {
170 u32 i;
171
172 INIT_LIST_HEAD(&cam->inqueue);
173 INIT_LIST_HEAD(&cam->outqueue);
174
175 for (i = 0; i < ET61X251_MAX_FRAMES; i++) {
176 cam->frame[i].state = F_UNUSED;
177 cam->frame[i].buf.bytesused = 0;
178 }
179 }
180
181
182 static void et61x251_requeue_outqueue(struct et61x251_device* cam)
183 {
184 struct et61x251_frame_t *i;
185
186 list_for_each_entry(i, &cam->outqueue, frame) {
187 i->state = F_QUEUED;
188 list_add(&i->frame, &cam->inqueue);
189 }
190
191 INIT_LIST_HEAD(&cam->outqueue);
192 }
193
194
195 static void et61x251_queue_unusedframes(struct et61x251_device* cam)
196 {
197 unsigned long lock_flags;
198 u32 i;
199
200 for (i = 0; i < cam->nbuffers; i++)
201 if (cam->frame[i].state == F_UNUSED) {
202 cam->frame[i].state = F_QUEUED;
203 spin_lock_irqsave(&cam->queue_lock, lock_flags);
204 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
205 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
206 }
207 }
208
209 /*****************************************************************************/
210
211 int et61x251_write_reg(struct et61x251_device* cam, u8 value, u16 index)
212 {
213 struct usb_device* udev = cam->usbdev;
214 u8* buff = cam->control_buffer;
215 int res;
216
217 *buff = value;
218
219 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
220 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
221 if (res < 0) {
222 DBG(3, "Failed to write a register (value 0x%02X, index "
223 "0x%02X, error %d)", value, index, res);
224 return -1;
225 }
226
227 return 0;
228 }
229
230
231 static int et61x251_read_reg(struct et61x251_device* cam, u16 index)
232 {
233 struct usb_device* udev = cam->usbdev;
234 u8* buff = cam->control_buffer;
235 int res;
236
237 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
238 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
239 if (res < 0)
240 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
241 index, res);
242
243 return (res >= 0) ? (int)(*buff) : -1;
244 }
245
246
247 static int
248 et61x251_i2c_wait(struct et61x251_device* cam,
249 const struct et61x251_sensor* sensor)
250 {
251 int i, r;
252
253 for (i = 1; i <= 8; i++) {
254 if (sensor->interface == ET61X251_I2C_3WIRES) {
255 r = et61x251_read_reg(cam, 0x8e);
256 if (!(r & 0x02) && (r >= 0))
257 return 0;
258 } else {
259 r = et61x251_read_reg(cam, 0x8b);
260 if (!(r & 0x01) && (r >= 0))
261 return 0;
262 }
263 if (r < 0)
264 return -EIO;
265 udelay(8*8); /* minimum for sensors at 400kHz */
266 }
267
268 return -EBUSY;
269 }
270
271
272 int
273 et61x251_i2c_raw_write(struct et61x251_device* cam, u8 n, u8 data1, u8 data2,
274 u8 data3, u8 data4, u8 data5, u8 data6, u8 data7,
275 u8 data8, u8 address)
276 {
277 struct usb_device* udev = cam->usbdev;
278 u8* data = cam->control_buffer;
279 int err = 0, res;
280
281 data[0] = data2;
282 data[1] = data3;
283 data[2] = data4;
284 data[3] = data5;
285 data[4] = data6;
286 data[5] = data7;
287 data[6] = data8;
288 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
289 0, 0x81, data, n-1, ET61X251_CTRL_TIMEOUT);
290 if (res < 0)
291 err += res;
292
293 data[0] = address;
294 data[1] = cam->sensor.i2c_slave_id;
295 data[2] = cam->sensor.rsta | 0x02 | (n << 4);
296 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
297 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
298 if (res < 0)
299 err += res;
300
301 /* Start writing through the serial interface */
302 data[0] = data1;
303 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
304 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
305 if (res < 0)
306 err += res;
307
308 err += et61x251_i2c_wait(cam, &cam->sensor);
309
310 if (err)
311 DBG(3, "I2C raw write failed for %s image sensor",
312 cam->sensor.name);
313
314 PDBGG("I2C raw write: %u bytes, address = 0x%02X, data1 = 0x%02X, "
315 "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X,"
316 " data6 = 0x%02X, data7 = 0x%02X, data8 = 0x%02X", n, address,
317 data1, data2, data3, data4, data5, data6, data7, data8);
318
319 return err ? -1 : 0;
320
321 }
322
323
324 /*****************************************************************************/
325
326 static void et61x251_urb_complete(struct urb *urb)
327 {
328 struct et61x251_device* cam = urb->context;
329 struct et61x251_frame_t** f;
330 size_t imagesize;
331 u8 i;
332 int err = 0;
333
334 if (urb->status == -ENOENT)
335 return;
336
337 f = &cam->frame_current;
338
339 if (cam->stream == STREAM_INTERRUPT) {
340 cam->stream = STREAM_OFF;
341 if ((*f))
342 (*f)->state = F_QUEUED;
343 DBG(3, "Stream interrupted");
344 wake_up(&cam->wait_stream);
345 }
346
347 if (cam->state & DEV_DISCONNECTED)
348 return;
349
350 if (cam->state & DEV_MISCONFIGURED) {
351 wake_up_interruptible(&cam->wait_frame);
352 return;
353 }
354
355 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
356 goto resubmit_urb;
357
358 if (!(*f))
359 (*f) = list_entry(cam->inqueue.next, struct et61x251_frame_t,
360 frame);
361
362 imagesize = (cam->sensor.pix_format.width *
363 cam->sensor.pix_format.height *
364 cam->sensor.pix_format.priv) / 8;
365
366 for (i = 0; i < urb->number_of_packets; i++) {
367 unsigned int len, status;
368 void *pos;
369 u8* b1, * b2, sof;
370 const u8 VOID_BYTES = 6;
371 size_t imglen;
372
373 len = urb->iso_frame_desc[i].actual_length;
374 status = urb->iso_frame_desc[i].status;
375 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
376
377 if (status) {
378 DBG(3, "Error in isochronous frame");
379 (*f)->state = F_ERROR;
380 continue;
381 }
382
383 b1 = pos++;
384 b2 = pos++;
385 sof = ((*b1 & 0x3f) == 63);
386 imglen = ((*b1 & 0xc0) << 2) | *b2;
387
388 PDBGG("Isochrnous frame: length %u, #%u i, image length %zu",
389 len, i, imglen);
390
391 if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR)
392 start_of_frame:
393 if (sof) {
394 (*f)->state = F_GRABBING;
395 (*f)->buf.bytesused = 0;
396 do_gettimeofday(&(*f)->buf.timestamp);
397 pos += 22;
398 DBG(3, "SOF detected: new video frame");
399 }
400
401 if ((*f)->state == F_GRABBING) {
402 if (sof && (*f)->buf.bytesused) {
403 if (cam->sensor.pix_format.pixelformat ==
404 V4L2_PIX_FMT_ET61X251)
405 goto end_of_frame;
406 else {
407 DBG(3, "Not expected SOF detected "
408 "after %lu bytes",
409 (unsigned long)(*f)->buf.bytesused);
410 (*f)->state = F_ERROR;
411 continue;
412 }
413 }
414
415 if ((*f)->buf.bytesused + imglen > imagesize) {
416 DBG(3, "Video frame size exceeded");
417 (*f)->state = F_ERROR;
418 continue;
419 }
420
421 pos += VOID_BYTES;
422
423 memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, imglen);
424 (*f)->buf.bytesused += imglen;
425
426 if ((*f)->buf.bytesused == imagesize) {
427 u32 b;
428 end_of_frame:
429 b = (*f)->buf.bytesused;
430 (*f)->state = F_DONE;
431 (*f)->buf.sequence= ++cam->frame_count;
432 spin_lock(&cam->queue_lock);
433 list_move_tail(&(*f)->frame, &cam->outqueue);
434 if (!list_empty(&cam->inqueue))
435 (*f) = list_entry(cam->inqueue.next,
436 struct et61x251_frame_t,
437 frame);
438 else
439 (*f) = NULL;
440 spin_unlock(&cam->queue_lock);
441 DBG(3, "Video frame captured: : %lu bytes",
442 (unsigned long)(b));
443
444 if (!(*f))
445 goto resubmit_urb;
446
447 if (sof &&
448 cam->sensor.pix_format.pixelformat ==
449 V4L2_PIX_FMT_ET61X251)
450 goto start_of_frame;
451 }
452 }
453 }
454
455 resubmit_urb:
456 urb->dev = cam->usbdev;
457 err = usb_submit_urb(urb, GFP_ATOMIC);
458 if (err < 0 && err != -EPERM) {
459 cam->state |= DEV_MISCONFIGURED;
460 DBG(1, "usb_submit_urb() failed");
461 }
462
463 wake_up_interruptible(&cam->wait_frame);
464 }
465
466
467 static int et61x251_start_transfer(struct et61x251_device* cam)
468 {
469 struct usb_device *udev = cam->usbdev;
470 struct urb* urb;
471 struct usb_host_interface* altsetting = usb_altnum_to_altsetting(
472 usb_ifnum_to_if(udev, 0),
473 ET61X251_ALTERNATE_SETTING);
474 const unsigned int psz = le16_to_cpu(altsetting->
475 endpoint[0].desc.wMaxPacketSize);
476 s8 i, j;
477 int err = 0;
478
479 for (i = 0; i < ET61X251_URBS; i++) {
480 cam->transfer_buffer[i] = kzalloc(ET61X251_ISO_PACKETS * psz,
481 GFP_KERNEL);
482 if (!cam->transfer_buffer[i]) {
483 err = -ENOMEM;
484 DBG(1, "Not enough memory");
485 goto free_buffers;
486 }
487 }
488
489 for (i = 0; i < ET61X251_URBS; i++) {
490 urb = usb_alloc_urb(ET61X251_ISO_PACKETS, GFP_KERNEL);
491 cam->urb[i] = urb;
492 if (!urb) {
493 err = -ENOMEM;
494 DBG(1, "usb_alloc_urb() failed");
495 goto free_urbs;
496 }
497 urb->dev = udev;
498 urb->context = cam;
499 urb->pipe = usb_rcvisocpipe(udev, 1);
500 urb->transfer_flags = URB_ISO_ASAP;
501 urb->number_of_packets = ET61X251_ISO_PACKETS;
502 urb->complete = et61x251_urb_complete;
503 urb->transfer_buffer = cam->transfer_buffer[i];
504 urb->transfer_buffer_length = psz * ET61X251_ISO_PACKETS;
505 urb->interval = 1;
506 for (j = 0; j < ET61X251_ISO_PACKETS; j++) {
507 urb->iso_frame_desc[j].offset = psz * j;
508 urb->iso_frame_desc[j].length = psz;
509 }
510 }
511
512 err = et61x251_write_reg(cam, 0x01, 0x03);
513 err = et61x251_write_reg(cam, 0x00, 0x03);
514 err = et61x251_write_reg(cam, 0x08, 0x03);
515 if (err) {
516 err = -EIO;
517 DBG(1, "I/O hardware error");
518 goto free_urbs;
519 }
520
521 err = usb_set_interface(udev, 0, ET61X251_ALTERNATE_SETTING);
522 if (err) {
523 DBG(1, "usb_set_interface() failed");
524 goto free_urbs;
525 }
526
527 cam->frame_current = NULL;
528
529 for (i = 0; i < ET61X251_URBS; i++) {
530 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
531 if (err) {
532 for (j = i-1; j >= 0; j--)
533 usb_kill_urb(cam->urb[j]);
534 DBG(1, "usb_submit_urb() failed, error %d", err);
535 goto free_urbs;
536 }
537 }
538
539 return 0;
540
541 free_urbs:
542 for (i = 0; (i < ET61X251_URBS) && cam->urb[i]; i++)
543 usb_free_urb(cam->urb[i]);
544
545 free_buffers:
546 for (i = 0; (i < ET61X251_URBS) && cam->transfer_buffer[i]; i++)
547 kfree(cam->transfer_buffer[i]);
548
549 return err;
550 }
551
552
553 static int et61x251_stop_transfer(struct et61x251_device* cam)
554 {
555 struct usb_device *udev = cam->usbdev;
556 s8 i;
557 int err = 0;
558
559 if (cam->state & DEV_DISCONNECTED)
560 return 0;
561
562 for (i = ET61X251_URBS-1; i >= 0; i--) {
563 usb_kill_urb(cam->urb[i]);
564 usb_free_urb(cam->urb[i]);
565 kfree(cam->transfer_buffer[i]);
566 }
567
568 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
569 if (err)
570 DBG(3, "usb_set_interface() failed");
571
572 return err;
573 }
574
575
576 static int et61x251_stream_interrupt(struct et61x251_device* cam)
577 {
578 long timeout;
579
580 cam->stream = STREAM_INTERRUPT;
581 timeout = wait_event_timeout(cam->wait_stream,
582 (cam->stream == STREAM_OFF) ||
583 (cam->state & DEV_DISCONNECTED),
584 ET61X251_URB_TIMEOUT);
585 if (cam->state & DEV_DISCONNECTED)
586 return -ENODEV;
587 else if (cam->stream != STREAM_OFF) {
588 cam->state |= DEV_MISCONFIGURED;
589 DBG(1, "URB timeout reached. The camera is misconfigured. To "
590 "use it, close and open /dev/video%d again.",
591 cam->v4ldev->num);
592 return -EIO;
593 }
594
595 return 0;
596 }
597
598 /*****************************************************************************/
599
600 #ifdef CONFIG_VIDEO_ADV_DEBUG
601
602 static int et61x251_i2c_try_read(struct et61x251_device* cam,
603 const struct et61x251_sensor* sensor,
604 u8 address)
605 {
606 struct usb_device* udev = cam->usbdev;
607 u8* data = cam->control_buffer;
608 int err = 0, res;
609
610 data[0] = address;
611 data[1] = cam->sensor.i2c_slave_id;
612 data[2] = cam->sensor.rsta | 0x10;
613 data[3] = !(et61x251_read_reg(cam, 0x8b) & 0x02);
614 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
615 0, 0x88, data, 4, ET61X251_CTRL_TIMEOUT);
616 if (res < 0)
617 err += res;
618
619 err += et61x251_i2c_wait(cam, sensor);
620
621 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
622 0, 0x80, data, 8, ET61X251_CTRL_TIMEOUT);
623 if (res < 0)
624 err += res;
625
626 if (err)
627 DBG(3, "I2C read failed for %s image sensor", sensor->name);
628
629 PDBGG("I2C read: address 0x%02X, value: 0x%02X", address, data[0]);
630
631 return err ? -1 : (int)data[0];
632 }
633
634
635 static int et61x251_i2c_try_write(struct et61x251_device* cam,
636 const struct et61x251_sensor* sensor,
637 u8 address, u8 value)
638 {
639 struct usb_device* udev = cam->usbdev;
640 u8* data = cam->control_buffer;
641 int err = 0, res;
642
643 data[0] = address;
644 data[1] = cam->sensor.i2c_slave_id;
645 data[2] = cam->sensor.rsta | 0x12;
646 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
647 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
648 if (res < 0)
649 err += res;
650
651 data[0] = value;
652 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
653 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
654 if (res < 0)
655 err += res;
656
657 err += et61x251_i2c_wait(cam, sensor);
658
659 if (err)
660 DBG(3, "I2C write failed for %s image sensor", sensor->name);
661
662 PDBGG("I2C write: address 0x%02X, value: 0x%02X", address, value);
663
664 return err ? -1 : 0;
665 }
666
667 static int et61x251_i2c_read(struct et61x251_device* cam, u8 address)
668 {
669 return et61x251_i2c_try_read(cam, &cam->sensor, address);
670 }
671
672 static int et61x251_i2c_write(struct et61x251_device* cam,
673 u8 address, u8 value)
674 {
675 return et61x251_i2c_try_write(cam, &cam->sensor, address, value);
676 }
677
678 static u8 et61x251_strtou8(const char* buff, size_t len, ssize_t* count)
679 {
680 char str[5];
681 char* endp;
682 unsigned long val;
683
684 if (len < 4) {
685 strncpy(str, buff, len);
686 str[len] = '\0';
687 } else {
688 strncpy(str, buff, 4);
689 str[4] = '\0';
690 }
691
692 val = simple_strtoul(str, &endp, 0);
693
694 *count = 0;
695 if (val <= 0xff)
696 *count = (ssize_t)(endp - str);
697 if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
698 *count += 1;
699
700 return (u8)val;
701 }
702
703 /*
704 NOTE 1: being inside one of the following methods implies that the v4l
705 device exists for sure (see kobjects and reference counters)
706 NOTE 2: buffers are PAGE_SIZE long
707 */
708
709 static ssize_t et61x251_show_reg(struct device* cd,
710 struct device_attribute *attr, char* buf)
711 {
712 struct et61x251_device* cam;
713 ssize_t count;
714
715 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
716 return -ERESTARTSYS;
717
718 cam = video_get_drvdata(to_video_device(cd));
719 if (!cam) {
720 mutex_unlock(&et61x251_sysfs_lock);
721 return -ENODEV;
722 }
723
724 count = sprintf(buf, "%u\n", cam->sysfs.reg);
725
726 mutex_unlock(&et61x251_sysfs_lock);
727
728 return count;
729 }
730
731
732 static ssize_t
733 et61x251_store_reg(struct device* cd,
734 struct device_attribute *attr, const char* buf, size_t len)
735 {
736 struct et61x251_device* cam;
737 u8 index;
738 ssize_t count;
739
740 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
741 return -ERESTARTSYS;
742
743 cam = video_get_drvdata(to_video_device(cd));
744 if (!cam) {
745 mutex_unlock(&et61x251_sysfs_lock);
746 return -ENODEV;
747 }
748
749 index = et61x251_strtou8(buf, len, &count);
750 if (index > 0x8e || !count) {
751 mutex_unlock(&et61x251_sysfs_lock);
752 return -EINVAL;
753 }
754
755 cam->sysfs.reg = index;
756
757 DBG(2, "Moved ET61X[12]51 register index to 0x%02X", cam->sysfs.reg);
758 DBG(3, "Written bytes: %zd", count);
759
760 mutex_unlock(&et61x251_sysfs_lock);
761
762 return count;
763 }
764
765
766 static ssize_t et61x251_show_val(struct device* cd,
767 struct device_attribute *attr, char* buf)
768 {
769 struct et61x251_device* cam;
770 ssize_t count;
771 int val;
772
773 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
774 return -ERESTARTSYS;
775
776 cam = video_get_drvdata(to_video_device(cd));
777 if (!cam) {
778 mutex_unlock(&et61x251_sysfs_lock);
779 return -ENODEV;
780 }
781
782 if ((val = et61x251_read_reg(cam, cam->sysfs.reg)) < 0) {
783 mutex_unlock(&et61x251_sysfs_lock);
784 return -EIO;
785 }
786
787 count = sprintf(buf, "%d\n", val);
788
789 DBG(3, "Read bytes: %zd", count);
790
791 mutex_unlock(&et61x251_sysfs_lock);
792
793 return count;
794 }
795
796
797 static ssize_t
798 et61x251_store_val(struct device* cd, struct device_attribute *attr,
799 const char* buf, size_t len)
800 {
801 struct et61x251_device* cam;
802 u8 value;
803 ssize_t count;
804 int err;
805
806 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
807 return -ERESTARTSYS;
808
809 cam = video_get_drvdata(to_video_device(cd));
810 if (!cam) {
811 mutex_unlock(&et61x251_sysfs_lock);
812 return -ENODEV;
813 }
814
815 value = et61x251_strtou8(buf, len, &count);
816 if (!count) {
817 mutex_unlock(&et61x251_sysfs_lock);
818 return -EINVAL;
819 }
820
821 err = et61x251_write_reg(cam, value, cam->sysfs.reg);
822 if (err) {
823 mutex_unlock(&et61x251_sysfs_lock);
824 return -EIO;
825 }
826
827 DBG(2, "Written ET61X[12]51 reg. 0x%02X, val. 0x%02X",
828 cam->sysfs.reg, value);
829 DBG(3, "Written bytes: %zd", count);
830
831 mutex_unlock(&et61x251_sysfs_lock);
832
833 return count;
834 }
835
836
837 static ssize_t et61x251_show_i2c_reg(struct device* cd,
838 struct device_attribute *attr, char* buf)
839 {
840 struct et61x251_device* cam;
841 ssize_t count;
842
843 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
844 return -ERESTARTSYS;
845
846 cam = video_get_drvdata(to_video_device(cd));
847 if (!cam) {
848 mutex_unlock(&et61x251_sysfs_lock);
849 return -ENODEV;
850 }
851
852 count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
853
854 DBG(3, "Read bytes: %zd", count);
855
856 mutex_unlock(&et61x251_sysfs_lock);
857
858 return count;
859 }
860
861
862 static ssize_t
863 et61x251_store_i2c_reg(struct device* cd, struct device_attribute *attr,
864 const char* buf, size_t len)
865 {
866 struct et61x251_device* cam;
867 u8 index;
868 ssize_t count;
869
870 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
871 return -ERESTARTSYS;
872
873 cam = video_get_drvdata(to_video_device(cd));
874 if (!cam) {
875 mutex_unlock(&et61x251_sysfs_lock);
876 return -ENODEV;
877 }
878
879 index = et61x251_strtou8(buf, len, &count);
880 if (!count) {
881 mutex_unlock(&et61x251_sysfs_lock);
882 return -EINVAL;
883 }
884
885 cam->sysfs.i2c_reg = index;
886
887 DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
888 DBG(3, "Written bytes: %zd", count);
889
890 mutex_unlock(&et61x251_sysfs_lock);
891
892 return count;
893 }
894
895
896 static ssize_t et61x251_show_i2c_val(struct device* cd,
897 struct device_attribute *attr, char* buf)
898 {
899 struct et61x251_device* cam;
900 ssize_t count;
901 int val;
902
903 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
904 return -ERESTARTSYS;
905
906 cam = video_get_drvdata(to_video_device(cd));
907 if (!cam) {
908 mutex_unlock(&et61x251_sysfs_lock);
909 return -ENODEV;
910 }
911
912 if (!(cam->sensor.sysfs_ops & ET61X251_I2C_READ)) {
913 mutex_unlock(&et61x251_sysfs_lock);
914 return -ENOSYS;
915 }
916
917 if ((val = et61x251_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
918 mutex_unlock(&et61x251_sysfs_lock);
919 return -EIO;
920 }
921
922 count = sprintf(buf, "%d\n", val);
923
924 DBG(3, "Read bytes: %zd", count);
925
926 mutex_unlock(&et61x251_sysfs_lock);
927
928 return count;
929 }
930
931
932 static ssize_t
933 et61x251_store_i2c_val(struct device* cd, struct device_attribute *attr,
934 const char* buf, size_t len)
935 {
936 struct et61x251_device* cam;
937 u8 value;
938 ssize_t count;
939 int err;
940
941 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
942 return -ERESTARTSYS;
943
944 cam = video_get_drvdata(to_video_device(cd));
945 if (!cam) {
946 mutex_unlock(&et61x251_sysfs_lock);
947 return -ENODEV;
948 }
949
950 if (!(cam->sensor.sysfs_ops & ET61X251_I2C_READ)) {
951 mutex_unlock(&et61x251_sysfs_lock);
952 return -ENOSYS;
953 }
954
955 value = et61x251_strtou8(buf, len, &count);
956 if (!count) {
957 mutex_unlock(&et61x251_sysfs_lock);
958 return -EINVAL;
959 }
960
961 err = et61x251_i2c_write(cam, cam->sysfs.i2c_reg, value);
962 if (err) {
963 mutex_unlock(&et61x251_sysfs_lock);
964 return -EIO;
965 }
966
967 DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
968 cam->sysfs.i2c_reg, value);
969 DBG(3, "Written bytes: %zd", count);
970
971 mutex_unlock(&et61x251_sysfs_lock);
972
973 return count;
974 }
975
976
977 static DEVICE_ATTR(reg, S_IRUGO | S_IWUSR,
978 et61x251_show_reg, et61x251_store_reg);
979 static DEVICE_ATTR(val, S_IRUGO | S_IWUSR,
980 et61x251_show_val, et61x251_store_val);
981 static DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
982 et61x251_show_i2c_reg, et61x251_store_i2c_reg);
983 static DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
984 et61x251_show_i2c_val, et61x251_store_i2c_val);
985
986
987 static int et61x251_create_sysfs(struct et61x251_device* cam)
988 {
989 struct device *classdev = &(cam->v4ldev->dev);
990 int err = 0;
991
992 if ((err = device_create_file(classdev, &dev_attr_reg)))
993 goto err_out;
994 if ((err = device_create_file(classdev, &dev_attr_val)))
995 goto err_reg;
996
997 if (cam->sensor.sysfs_ops) {
998 if ((err = device_create_file(classdev, &dev_attr_i2c_reg)))
999 goto err_val;
1000 if ((err = device_create_file(classdev, &dev_attr_i2c_val)))
1001 goto err_i2c_reg;
1002 }
1003
1004 err_i2c_reg:
1005 if (cam->sensor.sysfs_ops)
1006 device_remove_file(classdev, &dev_attr_i2c_reg);
1007 err_val:
1008 device_remove_file(classdev, &dev_attr_val);
1009 err_reg:
1010 device_remove_file(classdev, &dev_attr_reg);
1011 err_out:
1012 return err;
1013 }
1014 #endif /* CONFIG_VIDEO_ADV_DEBUG */
1015
1016 /*****************************************************************************/
1017
1018 static int
1019 et61x251_set_pix_format(struct et61x251_device* cam,
1020 struct v4l2_pix_format* pix)
1021 {
1022 int r, err = 0;
1023
1024 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1025 err += r;
1026 if (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1027 err += et61x251_write_reg(cam, r & 0xfd, 0x12);
1028 else
1029 err += et61x251_write_reg(cam, r | 0x02, 0x12);
1030
1031 return err ? -EIO : 0;
1032 }
1033
1034
1035 static int
1036 et61x251_set_compression(struct et61x251_device* cam,
1037 struct v4l2_jpegcompression* compression)
1038 {
1039 int r, err = 0;
1040
1041 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1042 err += r;
1043 if (compression->quality == 0)
1044 err += et61x251_write_reg(cam, r & 0xfb, 0x12);
1045 else
1046 err += et61x251_write_reg(cam, r | 0x04, 0x12);
1047
1048 return err ? -EIO : 0;
1049 }
1050
1051
1052 static int et61x251_set_scale(struct et61x251_device* cam, u8 scale)
1053 {
1054 int r = 0, err = 0;
1055
1056 r = et61x251_read_reg(cam, 0x12);
1057 if (r < 0)
1058 err += r;
1059
1060 if (scale == 1)
1061 err += et61x251_write_reg(cam, r & ~0x01, 0x12);
1062 else if (scale == 2)
1063 err += et61x251_write_reg(cam, r | 0x01, 0x12);
1064
1065 if (err)
1066 return -EIO;
1067
1068 PDBGG("Scaling factor: %u", scale);
1069
1070 return 0;
1071 }
1072
1073
1074 static int
1075 et61x251_set_crop(struct et61x251_device* cam, struct v4l2_rect* rect)
1076 {
1077 struct et61x251_sensor* s = &cam->sensor;
1078 u16 fmw_sx = (u16)(rect->left - s->cropcap.bounds.left +
1079 s->active_pixel.left),
1080 fmw_sy = (u16)(rect->top - s->cropcap.bounds.top +
1081 s->active_pixel.top),
1082 fmw_length = (u16)(rect->width),
1083 fmw_height = (u16)(rect->height);
1084 int err = 0;
1085
1086 err += et61x251_write_reg(cam, fmw_sx & 0xff, 0x69);
1087 err += et61x251_write_reg(cam, fmw_sy & 0xff, 0x6a);
1088 err += et61x251_write_reg(cam, fmw_length & 0xff, 0x6b);
1089 err += et61x251_write_reg(cam, fmw_height & 0xff, 0x6c);
1090 err += et61x251_write_reg(cam, (fmw_sx >> 8) | ((fmw_sy & 0x300) >> 6)
1091 | ((fmw_length & 0x300) >> 4)
1092 | ((fmw_height & 0x300) >> 2), 0x6d);
1093 if (err)
1094 return -EIO;
1095
1096 PDBGG("fmw_sx, fmw_sy, fmw_length, fmw_height: %u %u %u %u",
1097 fmw_sx, fmw_sy, fmw_length, fmw_height);
1098
1099 return 0;
1100 }
1101
1102
1103 static int et61x251_init(struct et61x251_device* cam)
1104 {
1105 struct et61x251_sensor* s = &cam->sensor;
1106 struct v4l2_control ctrl;
1107 struct v4l2_queryctrl *qctrl;
1108 struct v4l2_rect* rect;
1109 u8 i = 0;
1110 int err = 0;
1111
1112 if (!(cam->state & DEV_INITIALIZED)) {
1113 mutex_init(&cam->open_mutex);
1114 init_waitqueue_head(&cam->wait_open);
1115 qctrl = s->qctrl;
1116 rect = &(s->cropcap.defrect);
1117 cam->compression.quality = ET61X251_COMPRESSION_QUALITY;
1118 } else { /* use current values */
1119 qctrl = s->_qctrl;
1120 rect = &(s->_rect);
1121 }
1122
1123 err += et61x251_set_scale(cam, rect->width / s->pix_format.width);
1124 err += et61x251_set_crop(cam, rect);
1125 if (err)
1126 return err;
1127
1128 if (s->init) {
1129 err = s->init(cam);
1130 if (err) {
1131 DBG(3, "Sensor initialization failed");
1132 return err;
1133 }
1134 }
1135
1136 err += et61x251_set_compression(cam, &cam->compression);
1137 err += et61x251_set_pix_format(cam, &s->pix_format);
1138 if (s->set_pix_format)
1139 err += s->set_pix_format(cam, &s->pix_format);
1140 if (err)
1141 return err;
1142
1143 if (s->pix_format.pixelformat == V4L2_PIX_FMT_ET61X251)
1144 DBG(3, "Compressed video format is active, quality %d",
1145 cam->compression.quality);
1146 else
1147 DBG(3, "Uncompressed video format is active");
1148
1149 if (s->set_crop)
1150 if ((err = s->set_crop(cam, rect))) {
1151 DBG(3, "set_crop() failed");
1152 return err;
1153 }
1154
1155 if (s->set_ctrl) {
1156 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1157 if (s->qctrl[i].id != 0 &&
1158 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1159 ctrl.id = s->qctrl[i].id;
1160 ctrl.value = qctrl[i].default_value;
1161 err = s->set_ctrl(cam, &ctrl);
1162 if (err) {
1163 DBG(3, "Set %s control failed",
1164 s->qctrl[i].name);
1165 return err;
1166 }
1167 DBG(3, "Image sensor supports '%s' control",
1168 s->qctrl[i].name);
1169 }
1170 }
1171
1172 if (!(cam->state & DEV_INITIALIZED)) {
1173 mutex_init(&cam->fileop_mutex);
1174 spin_lock_init(&cam->queue_lock);
1175 init_waitqueue_head(&cam->wait_frame);
1176 init_waitqueue_head(&cam->wait_stream);
1177 cam->nreadbuffers = 2;
1178 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
1179 memcpy(&(s->_rect), &(s->cropcap.defrect),
1180 sizeof(struct v4l2_rect));
1181 cam->state |= DEV_INITIALIZED;
1182 }
1183
1184 DBG(2, "Initialization succeeded");
1185 return 0;
1186 }
1187
1188 /*****************************************************************************/
1189
1190 static void et61x251_release_resources(struct kref *kref)
1191 {
1192 struct et61x251_device *cam;
1193
1194 mutex_lock(&et61x251_sysfs_lock);
1195
1196 cam = container_of(kref, struct et61x251_device, kref);
1197
1198 DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->num);
1199 video_set_drvdata(cam->v4ldev, NULL);
1200 video_unregister_device(cam->v4ldev);
1201 usb_put_dev(cam->usbdev);
1202 kfree(cam->control_buffer);
1203 kfree(cam);
1204
1205 mutex_unlock(&et61x251_sysfs_lock);
1206 }
1207
1208
1209 static int et61x251_open(struct file *filp)
1210 {
1211 struct et61x251_device* cam;
1212 int err = 0;
1213
1214 if (!down_read_trylock(&et61x251_dev_lock))
1215 return -ERESTARTSYS;
1216
1217 cam = video_drvdata(filp);
1218
1219 if (wait_for_completion_interruptible(&cam->probe)) {
1220 up_read(&et61x251_dev_lock);
1221 return -ERESTARTSYS;
1222 }
1223
1224 kref_get(&cam->kref);
1225
1226 if (mutex_lock_interruptible(&cam->open_mutex)) {
1227 kref_put(&cam->kref, et61x251_release_resources);
1228 up_read(&et61x251_dev_lock);
1229 return -ERESTARTSYS;
1230 }
1231
1232 if (cam->state & DEV_DISCONNECTED) {
1233 DBG(1, "Device not present");
1234 err = -ENODEV;
1235 goto out;
1236 }
1237
1238 if (cam->users) {
1239 DBG(2, "Device /dev/video%d is already in use",
1240 cam->v4ldev->num);
1241 DBG(3, "Simultaneous opens are not supported");
1242 if ((filp->f_flags & O_NONBLOCK) ||
1243 (filp->f_flags & O_NDELAY)) {
1244 err = -EWOULDBLOCK;
1245 goto out;
1246 }
1247 DBG(2, "A blocking open() has been requested. Wait for the "
1248 "device to be released...");
1249 up_read(&et61x251_dev_lock);
1250 err = wait_event_interruptible_exclusive(cam->wait_open,
1251 (cam->state & DEV_DISCONNECTED)
1252 || !cam->users);
1253 down_read(&et61x251_dev_lock);
1254 if (err)
1255 goto out;
1256 if (cam->state & DEV_DISCONNECTED) {
1257 err = -ENODEV;
1258 goto out;
1259 }
1260 }
1261
1262 if (cam->state & DEV_MISCONFIGURED) {
1263 err = et61x251_init(cam);
1264 if (err) {
1265 DBG(1, "Initialization failed again. "
1266 "I will retry on next open().");
1267 goto out;
1268 }
1269 cam->state &= ~DEV_MISCONFIGURED;
1270 }
1271
1272 if ((err = et61x251_start_transfer(cam)))
1273 goto out;
1274
1275 filp->private_data = cam;
1276 cam->users++;
1277 cam->io = IO_NONE;
1278 cam->stream = STREAM_OFF;
1279 cam->nbuffers = 0;
1280 cam->frame_count = 0;
1281 et61x251_empty_framequeues(cam);
1282
1283 DBG(3, "Video device /dev/video%d is open", cam->v4ldev->num);
1284
1285 out:
1286 mutex_unlock(&cam->open_mutex);
1287 if (err)
1288 kref_put(&cam->kref, et61x251_release_resources);
1289 up_read(&et61x251_dev_lock);
1290 return err;
1291 }
1292
1293
1294 static int et61x251_release(struct file *filp)
1295 {
1296 struct et61x251_device* cam;
1297
1298 down_write(&et61x251_dev_lock);
1299
1300 cam = video_drvdata(filp);
1301
1302 et61x251_stop_transfer(cam);
1303 et61x251_release_buffers(cam);
1304 cam->users--;
1305 wake_up_interruptible_nr(&cam->wait_open, 1);
1306
1307 DBG(3, "Video device /dev/video%d closed", cam->v4ldev->num);
1308
1309 kref_put(&cam->kref, et61x251_release_resources);
1310
1311 up_write(&et61x251_dev_lock);
1312
1313 return 0;
1314 }
1315
1316
1317 static ssize_t
1318 et61x251_read(struct file* filp, char __user * buf,
1319 size_t count, loff_t* f_pos)
1320 {
1321 struct et61x251_device *cam = video_drvdata(filp);
1322 struct et61x251_frame_t* f, * i;
1323 unsigned long lock_flags;
1324 long timeout;
1325 int err = 0;
1326
1327 if (mutex_lock_interruptible(&cam->fileop_mutex))
1328 return -ERESTARTSYS;
1329
1330 if (cam->state & DEV_DISCONNECTED) {
1331 DBG(1, "Device not present");
1332 mutex_unlock(&cam->fileop_mutex);
1333 return -ENODEV;
1334 }
1335
1336 if (cam->state & DEV_MISCONFIGURED) {
1337 DBG(1, "The camera is misconfigured. Close and open it "
1338 "again.");
1339 mutex_unlock(&cam->fileop_mutex);
1340 return -EIO;
1341 }
1342
1343 if (cam->io == IO_MMAP) {
1344 DBG(3, "Close and open the device again to choose the read "
1345 "method");
1346 mutex_unlock(&cam->fileop_mutex);
1347 return -EBUSY;
1348 }
1349
1350 if (cam->io == IO_NONE) {
1351 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1352 IO_READ)) {
1353 DBG(1, "read() failed, not enough memory");
1354 mutex_unlock(&cam->fileop_mutex);
1355 return -ENOMEM;
1356 }
1357 cam->io = IO_READ;
1358 cam->stream = STREAM_ON;
1359 }
1360
1361 if (list_empty(&cam->inqueue)) {
1362 if (!list_empty(&cam->outqueue))
1363 et61x251_empty_framequeues(cam);
1364 et61x251_queue_unusedframes(cam);
1365 }
1366
1367 if (!count) {
1368 mutex_unlock(&cam->fileop_mutex);
1369 return 0;
1370 }
1371
1372 if (list_empty(&cam->outqueue)) {
1373 if (filp->f_flags & O_NONBLOCK) {
1374 mutex_unlock(&cam->fileop_mutex);
1375 return -EAGAIN;
1376 }
1377 timeout = wait_event_interruptible_timeout
1378 ( cam->wait_frame,
1379 (!list_empty(&cam->outqueue)) ||
1380 (cam->state & DEV_DISCONNECTED) ||
1381 (cam->state & DEV_MISCONFIGURED),
1382 cam->module_param.frame_timeout *
1383 1000 * msecs_to_jiffies(1) );
1384 if (timeout < 0) {
1385 mutex_unlock(&cam->fileop_mutex);
1386 return timeout;
1387 }
1388 if (cam->state & DEV_DISCONNECTED) {
1389 mutex_unlock(&cam->fileop_mutex);
1390 return -ENODEV;
1391 }
1392 if (!timeout || (cam->state & DEV_MISCONFIGURED)) {
1393 mutex_unlock(&cam->fileop_mutex);
1394 return -EIO;
1395 }
1396 }
1397
1398 f = list_entry(cam->outqueue.prev, struct et61x251_frame_t, frame);
1399
1400 if (count > f->buf.bytesused)
1401 count = f->buf.bytesused;
1402
1403 if (copy_to_user(buf, f->bufmem, count)) {
1404 err = -EFAULT;
1405 goto exit;
1406 }
1407 *f_pos += count;
1408
1409 exit:
1410 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1411 list_for_each_entry(i, &cam->outqueue, frame)
1412 i->state = F_UNUSED;
1413 INIT_LIST_HEAD(&cam->outqueue);
1414 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1415
1416 et61x251_queue_unusedframes(cam);
1417
1418 PDBGG("Frame #%lu, bytes read: %zu",
1419 (unsigned long)f->buf.index, count);
1420
1421 mutex_unlock(&cam->fileop_mutex);
1422
1423 return err ? err : count;
1424 }
1425
1426
1427 static unsigned int et61x251_poll(struct file *filp, poll_table *wait)
1428 {
1429 struct et61x251_device *cam = video_drvdata(filp);
1430 struct et61x251_frame_t* f;
1431 unsigned long lock_flags;
1432 unsigned int mask = 0;
1433
1434 if (mutex_lock_interruptible(&cam->fileop_mutex))
1435 return POLLERR;
1436
1437 if (cam->state & DEV_DISCONNECTED) {
1438 DBG(1, "Device not present");
1439 goto error;
1440 }
1441
1442 if (cam->state & DEV_MISCONFIGURED) {
1443 DBG(1, "The camera is misconfigured. Close and open it "
1444 "again.");
1445 goto error;
1446 }
1447
1448 if (cam->io == IO_NONE) {
1449 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1450 IO_READ)) {
1451 DBG(1, "poll() failed, not enough memory");
1452 goto error;
1453 }
1454 cam->io = IO_READ;
1455 cam->stream = STREAM_ON;
1456 }
1457
1458 if (cam->io == IO_READ) {
1459 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1460 list_for_each_entry(f, &cam->outqueue, frame)
1461 f->state = F_UNUSED;
1462 INIT_LIST_HEAD(&cam->outqueue);
1463 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1464 et61x251_queue_unusedframes(cam);
1465 }
1466
1467 poll_wait(filp, &cam->wait_frame, wait);
1468
1469 if (!list_empty(&cam->outqueue))
1470 mask |= POLLIN | POLLRDNORM;
1471
1472 mutex_unlock(&cam->fileop_mutex);
1473
1474 return mask;
1475
1476 error:
1477 mutex_unlock(&cam->fileop_mutex);
1478 return POLLERR;
1479 }
1480
1481
1482 static void et61x251_vm_open(struct vm_area_struct* vma)
1483 {
1484 struct et61x251_frame_t* f = vma->vm_private_data;
1485 f->vma_use_count++;
1486 }
1487
1488
1489 static void et61x251_vm_close(struct vm_area_struct* vma)
1490 {
1491 /* NOTE: buffers are not freed here */
1492 struct et61x251_frame_t* f = vma->vm_private_data;
1493 f->vma_use_count--;
1494 }
1495
1496
1497 static struct vm_operations_struct et61x251_vm_ops = {
1498 .open = et61x251_vm_open,
1499 .close = et61x251_vm_close,
1500 };
1501
1502
1503 static int et61x251_mmap(struct file* filp, struct vm_area_struct *vma)
1504 {
1505 struct et61x251_device *cam = video_drvdata(filp);
1506 unsigned long size = vma->vm_end - vma->vm_start,
1507 start = vma->vm_start;
1508 void *pos;
1509 u32 i;
1510
1511 if (mutex_lock_interruptible(&cam->fileop_mutex))
1512 return -ERESTARTSYS;
1513
1514 if (cam->state & DEV_DISCONNECTED) {
1515 DBG(1, "Device not present");
1516 mutex_unlock(&cam->fileop_mutex);
1517 return -ENODEV;
1518 }
1519
1520 if (cam->state & DEV_MISCONFIGURED) {
1521 DBG(1, "The camera is misconfigured. Close and open it "
1522 "again.");
1523 mutex_unlock(&cam->fileop_mutex);
1524 return -EIO;
1525 }
1526
1527 if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
1528 mutex_unlock(&cam->fileop_mutex);
1529 return -EACCES;
1530 }
1531
1532 if (cam->io != IO_MMAP ||
1533 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
1534 mutex_unlock(&cam->fileop_mutex);
1535 return -EINVAL;
1536 }
1537
1538 for (i = 0; i < cam->nbuffers; i++) {
1539 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
1540 break;
1541 }
1542 if (i == cam->nbuffers) {
1543 mutex_unlock(&cam->fileop_mutex);
1544 return -EINVAL;
1545 }
1546
1547 vma->vm_flags |= VM_IO;
1548 vma->vm_flags |= VM_RESERVED;
1549
1550 pos = cam->frame[i].bufmem;
1551 while (size > 0) { /* size is page-aligned */
1552 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1553 mutex_unlock(&cam->fileop_mutex);
1554 return -EAGAIN;
1555 }
1556 start += PAGE_SIZE;
1557 pos += PAGE_SIZE;
1558 size -= PAGE_SIZE;
1559 }
1560
1561 vma->vm_ops = &et61x251_vm_ops;
1562 vma->vm_private_data = &cam->frame[i];
1563 et61x251_vm_open(vma);
1564
1565 mutex_unlock(&cam->fileop_mutex);
1566
1567 return 0;
1568 }
1569
1570 /*****************************************************************************/
1571
1572 static int
1573 et61x251_vidioc_querycap(struct et61x251_device* cam, void __user * arg)
1574 {
1575 struct v4l2_capability cap = {
1576 .driver = "et61x251",
1577 .version = ET61X251_MODULE_VERSION_CODE,
1578 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1579 V4L2_CAP_STREAMING,
1580 };
1581
1582 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
1583 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
1584 strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
1585 sizeof(cap.bus_info));
1586
1587 if (copy_to_user(arg, &cap, sizeof(cap)))
1588 return -EFAULT;
1589
1590 return 0;
1591 }
1592
1593
1594 static int
1595 et61x251_vidioc_enuminput(struct et61x251_device* cam, void __user * arg)
1596 {
1597 struct v4l2_input i;
1598
1599 if (copy_from_user(&i, arg, sizeof(i)))
1600 return -EFAULT;
1601
1602 if (i.index)
1603 return -EINVAL;
1604
1605 memset(&i, 0, sizeof(i));
1606 strcpy(i.name, "Camera");
1607 i.type = V4L2_INPUT_TYPE_CAMERA;
1608
1609 if (copy_to_user(arg, &i, sizeof(i)))
1610 return -EFAULT;
1611
1612 return 0;
1613 }
1614
1615
1616 static int
1617 et61x251_vidioc_g_input(struct et61x251_device* cam, void __user * arg)
1618 {
1619 int index = 0;
1620
1621 if (copy_to_user(arg, &index, sizeof(index)))
1622 return -EFAULT;
1623
1624 return 0;
1625 }
1626
1627
1628 static int
1629 et61x251_vidioc_s_input(struct et61x251_device* cam, void __user * arg)
1630 {
1631 int index;
1632
1633 if (copy_from_user(&index, arg, sizeof(index)))
1634 return -EFAULT;
1635
1636 if (index != 0)
1637 return -EINVAL;
1638
1639 return 0;
1640 }
1641
1642
1643 static int
1644 et61x251_vidioc_query_ctrl(struct et61x251_device* cam, void __user * arg)
1645 {
1646 struct et61x251_sensor* s = &cam->sensor;
1647 struct v4l2_queryctrl qc;
1648 u8 i;
1649
1650 if (copy_from_user(&qc, arg, sizeof(qc)))
1651 return -EFAULT;
1652
1653 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1654 if (qc.id && qc.id == s->qctrl[i].id) {
1655 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1656 if (copy_to_user(arg, &qc, sizeof(qc)))
1657 return -EFAULT;
1658 return 0;
1659 }
1660
1661 return -EINVAL;
1662 }
1663
1664
1665 static int
1666 et61x251_vidioc_g_ctrl(struct et61x251_device* cam, void __user * arg)
1667 {
1668 struct et61x251_sensor* s = &cam->sensor;
1669 struct v4l2_control ctrl;
1670 int err = 0;
1671 u8 i;
1672
1673 if (!s->get_ctrl && !s->set_ctrl)
1674 return -EINVAL;
1675
1676 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1677 return -EFAULT;
1678
1679 if (!s->get_ctrl) {
1680 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1681 if (ctrl.id == s->qctrl[i].id) {
1682 ctrl.value = s->_qctrl[i].default_value;
1683 goto exit;
1684 }
1685 return -EINVAL;
1686 } else
1687 err = s->get_ctrl(cam, &ctrl);
1688
1689 exit:
1690 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1691 return -EFAULT;
1692
1693 return err;
1694 }
1695
1696
1697 static int
1698 et61x251_vidioc_s_ctrl(struct et61x251_device* cam, void __user * arg)
1699 {
1700 struct et61x251_sensor* s = &cam->sensor;
1701 struct v4l2_control ctrl;
1702 u8 i;
1703 int err = 0;
1704
1705 if (!s->set_ctrl)
1706 return -EINVAL;
1707
1708 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1709 return -EFAULT;
1710
1711 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1712 if (ctrl.id == s->qctrl[i].id) {
1713 if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
1714 return -EINVAL;
1715 if (ctrl.value < s->qctrl[i].minimum ||
1716 ctrl.value > s->qctrl[i].maximum)
1717 return -ERANGE;
1718 ctrl.value -= ctrl.value % s->qctrl[i].step;
1719 break;
1720 }
1721
1722 if ((err = s->set_ctrl(cam, &ctrl)))
1723 return err;
1724
1725 s->_qctrl[i].default_value = ctrl.value;
1726
1727 return 0;
1728 }
1729
1730
1731 static int
1732 et61x251_vidioc_cropcap(struct et61x251_device* cam, void __user * arg)
1733 {
1734 struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
1735
1736 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1737 cc->pixelaspect.numerator = 1;
1738 cc->pixelaspect.denominator = 1;
1739
1740 if (copy_to_user(arg, cc, sizeof(*cc)))
1741 return -EFAULT;
1742
1743 return 0;
1744 }
1745
1746
1747 static int
1748 et61x251_vidioc_g_crop(struct et61x251_device* cam, void __user * arg)
1749 {
1750 struct et61x251_sensor* s = &cam->sensor;
1751 struct v4l2_crop crop = {
1752 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1753 };
1754
1755 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1756
1757 if (copy_to_user(arg, &crop, sizeof(crop)))
1758 return -EFAULT;
1759
1760 return 0;
1761 }
1762
1763
1764 static int
1765 et61x251_vidioc_s_crop(struct et61x251_device* cam, void __user * arg)
1766 {
1767 struct et61x251_sensor* s = &cam->sensor;
1768 struct v4l2_crop crop;
1769 struct v4l2_rect* rect;
1770 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1771 struct v4l2_pix_format* pix_format = &(s->pix_format);
1772 u8 scale;
1773 const enum et61x251_stream_state stream = cam->stream;
1774 const u32 nbuffers = cam->nbuffers;
1775 u32 i;
1776 int err = 0;
1777
1778 if (copy_from_user(&crop, arg, sizeof(crop)))
1779 return -EFAULT;
1780
1781 rect = &(crop.c);
1782
1783 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1784 return -EINVAL;
1785
1786 if (cam->module_param.force_munmap)
1787 for (i = 0; i < cam->nbuffers; i++)
1788 if (cam->frame[i].vma_use_count) {
1789 DBG(3, "VIDIOC_S_CROP failed. "
1790 "Unmap the buffers first.");
1791 return -EBUSY;
1792 }
1793
1794 /* Preserve R,G or B origin */
1795 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
1796 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
1797
1798 if (rect->width < 16)
1799 rect->width = 16;
1800 if (rect->height < 16)
1801 rect->height = 16;
1802 if (rect->width > bounds->width)
1803 rect->width = bounds->width;
1804 if (rect->height > bounds->height)
1805 rect->height = bounds->height;
1806 if (rect->left < bounds->left)
1807 rect->left = bounds->left;
1808 if (rect->top < bounds->top)
1809 rect->top = bounds->top;
1810 if (rect->left + rect->width > bounds->left + bounds->width)
1811 rect->left = bounds->left+bounds->width - rect->width;
1812 if (rect->top + rect->height > bounds->top + bounds->height)
1813 rect->top = bounds->top+bounds->height - rect->height;
1814
1815 rect->width &= ~15L;
1816 rect->height &= ~15L;
1817
1818 if (ET61X251_PRESERVE_IMGSCALE) {
1819 /* Calculate the actual scaling factor */
1820 u32 a, b;
1821 a = rect->width * rect->height;
1822 b = pix_format->width * pix_format->height;
1823 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1824 } else
1825 scale = 1;
1826
1827 if (cam->stream == STREAM_ON)
1828 if ((err = et61x251_stream_interrupt(cam)))
1829 return err;
1830
1831 if (copy_to_user(arg, &crop, sizeof(crop))) {
1832 cam->stream = stream;
1833 return -EFAULT;
1834 }
1835
1836 if (cam->module_param.force_munmap || cam->io == IO_READ)
1837 et61x251_release_buffers(cam);
1838
1839 err = et61x251_set_crop(cam, rect);
1840 if (s->set_crop)
1841 err += s->set_crop(cam, rect);
1842 err += et61x251_set_scale(cam, scale);
1843
1844 if (err) { /* atomic, no rollback in ioctl() */
1845 cam->state |= DEV_MISCONFIGURED;
1846 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
1847 "use the camera, close and open /dev/video%d again.",
1848 cam->v4ldev->num);
1849 return -EIO;
1850 }
1851
1852 s->pix_format.width = rect->width/scale;
1853 s->pix_format.height = rect->height/scale;
1854 memcpy(&(s->_rect), rect, sizeof(*rect));
1855
1856 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1857 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1858 cam->state |= DEV_MISCONFIGURED;
1859 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
1860 "use the camera, close and open /dev/video%d again.",
1861 cam->v4ldev->num);
1862 return -ENOMEM;
1863 }
1864
1865 if (cam->io == IO_READ)
1866 et61x251_empty_framequeues(cam);
1867 else if (cam->module_param.force_munmap)
1868 et61x251_requeue_outqueue(cam);
1869
1870 cam->stream = stream;
1871
1872 return 0;
1873 }
1874
1875
1876 static int
1877 et61x251_vidioc_enum_framesizes(struct et61x251_device* cam, void __user * arg)
1878 {
1879 struct v4l2_frmsizeenum frmsize;
1880
1881 if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
1882 return -EFAULT;
1883
1884 if (frmsize.index != 0)
1885 return -EINVAL;
1886
1887 if (frmsize.pixel_format != V4L2_PIX_FMT_ET61X251 &&
1888 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
1889 return -EINVAL;
1890
1891 frmsize.type = V4L2_FRMSIZE_TYPE_STEPWISE;
1892 frmsize.stepwise.min_width = frmsize.stepwise.step_width = 16;
1893 frmsize.stepwise.min_height = frmsize.stepwise.step_height = 16;
1894 frmsize.stepwise.max_width = cam->sensor.cropcap.bounds.width;
1895 frmsize.stepwise.max_height = cam->sensor.cropcap.bounds.height;
1896 memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
1897
1898 if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
1899 return -EFAULT;
1900
1901 return 0;
1902 }
1903
1904
1905 static int
1906 et61x251_vidioc_enum_fmt(struct et61x251_device* cam, void __user * arg)
1907 {
1908 struct v4l2_fmtdesc fmtd;
1909
1910 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
1911 return -EFAULT;
1912
1913 if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1914 return -EINVAL;
1915
1916 if (fmtd.index == 0) {
1917 strcpy(fmtd.description, "bayer rgb");
1918 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
1919 } else if (fmtd.index == 1) {
1920 strcpy(fmtd.description, "compressed");
1921 fmtd.pixelformat = V4L2_PIX_FMT_ET61X251;
1922 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
1923 } else
1924 return -EINVAL;
1925
1926 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1927 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1928
1929 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
1930 return -EFAULT;
1931
1932 return 0;
1933 }
1934
1935
1936 static int
1937 et61x251_vidioc_g_fmt(struct et61x251_device* cam, void __user * arg)
1938 {
1939 struct v4l2_format format;
1940 struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
1941
1942 if (copy_from_user(&format, arg, sizeof(format)))
1943 return -EFAULT;
1944
1945 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1946 return -EINVAL;
1947
1948 pfmt->colorspace = (pfmt->pixelformat == V4L2_PIX_FMT_ET61X251) ?
1949 0 : V4L2_COLORSPACE_SRGB;
1950 pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_ET61X251)
1951 ? 0 : (pfmt->width * pfmt->priv) / 8;
1952 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
1953 pfmt->field = V4L2_FIELD_NONE;
1954 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1955
1956 if (copy_to_user(arg, &format, sizeof(format)))
1957 return -EFAULT;
1958
1959 return 0;
1960 }
1961
1962
1963 static int
1964 et61x251_vidioc_try_s_fmt(struct et61x251_device* cam, unsigned int cmd,
1965 void __user * arg)
1966 {
1967 struct et61x251_sensor* s = &cam->sensor;
1968 struct v4l2_format format;
1969 struct v4l2_pix_format* pix;
1970 struct v4l2_pix_format* pfmt = &(s->pix_format);
1971 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1972 struct v4l2_rect rect;
1973 u8 scale;
1974 const enum et61x251_stream_state stream = cam->stream;
1975 const u32 nbuffers = cam->nbuffers;
1976 u32 i;
1977 int err = 0;
1978
1979 if (copy_from_user(&format, arg, sizeof(format)))
1980 return -EFAULT;
1981
1982 pix = &(format.fmt.pix);
1983
1984 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1985 return -EINVAL;
1986
1987 memcpy(&rect, &(s->_rect), sizeof(rect));
1988
1989 { /* calculate the actual scaling factor */
1990 u32 a, b;
1991 a = rect.width * rect.height;
1992 b = pix->width * pix->height;
1993 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1994 }
1995
1996 rect.width = scale * pix->width;
1997 rect.height = scale * pix->height;
1998
1999 if (rect.width < 16)
2000 rect.width = 16;
2001 if (rect.height < 16)
2002 rect.height = 16;
2003 if (rect.width > bounds->left + bounds->width - rect.left)
2004 rect.width = bounds->left + bounds->width - rect.left;
2005 if (rect.height > bounds->top + bounds->height - rect.top)
2006 rect.height = bounds->top + bounds->height - rect.top;
2007
2008 rect.width &= ~15L;
2009 rect.height &= ~15L;
2010
2011 { /* adjust the scaling factor */
2012 u32 a, b;
2013 a = rect.width * rect.height;
2014 b = pix->width * pix->height;
2015 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
2016 }
2017
2018 pix->width = rect.width / scale;
2019 pix->height = rect.height / scale;
2020
2021 if (pix->pixelformat != V4L2_PIX_FMT_ET61X251 &&
2022 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2023 pix->pixelformat = pfmt->pixelformat;
2024 pix->priv = pfmt->priv; /* bpp */
2025 pix->colorspace = (pix->pixelformat == V4L2_PIX_FMT_ET61X251) ?
2026 0 : V4L2_COLORSPACE_SRGB;
2027 pix->colorspace = pfmt->colorspace;
2028 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
2029 ? 0 : (pix->width * pix->priv) / 8;
2030 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
2031 pix->field = V4L2_FIELD_NONE;
2032
2033 if (cmd == VIDIOC_TRY_FMT) {
2034 if (copy_to_user(arg, &format, sizeof(format)))
2035 return -EFAULT;
2036 return 0;
2037 }
2038
2039 if (cam->module_param.force_munmap)
2040 for (i = 0; i < cam->nbuffers; i++)
2041 if (cam->frame[i].vma_use_count) {
2042 DBG(3, "VIDIOC_S_FMT failed. "
2043 "Unmap the buffers first.");
2044 return -EBUSY;
2045 }
2046
2047 if (cam->stream == STREAM_ON)
2048 if ((err = et61x251_stream_interrupt(cam)))
2049 return err;
2050
2051 if (copy_to_user(arg, &format, sizeof(format))) {
2052 cam->stream = stream;
2053 return -EFAULT;
2054 }
2055
2056 if (cam->module_param.force_munmap || cam->io == IO_READ)
2057 et61x251_release_buffers(cam);
2058
2059 err += et61x251_set_pix_format(cam, pix);
2060 err += et61x251_set_crop(cam, &rect);
2061 if (s->set_pix_format)
2062 err += s->set_pix_format(cam, pix);
2063 if (s->set_crop)
2064 err += s->set_crop(cam, &rect);
2065 err += et61x251_set_scale(cam, scale);
2066
2067 if (err) { /* atomic, no rollback in ioctl() */
2068 cam->state |= DEV_MISCONFIGURED;
2069 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
2070 "use the camera, close and open /dev/video%d again.",
2071 cam->v4ldev->num);
2072 return -EIO;
2073 }
2074
2075 memcpy(pfmt, pix, sizeof(*pix));
2076 memcpy(&(s->_rect), &rect, sizeof(rect));
2077
2078 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2079 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
2080 cam->state |= DEV_MISCONFIGURED;
2081 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2082 "use the camera, close and open /dev/video%d again.",
2083 cam->v4ldev->num);
2084 return -ENOMEM;
2085 }
2086
2087 if (cam->io == IO_READ)
2088 et61x251_empty_framequeues(cam);
2089 else if (cam->module_param.force_munmap)
2090 et61x251_requeue_outqueue(cam);
2091
2092 cam->stream = stream;
2093
2094 return 0;
2095 }
2096
2097
2098 static int
2099 et61x251_vidioc_g_jpegcomp(struct et61x251_device* cam, void __user * arg)
2100 {
2101 if (copy_to_user(arg, &cam->compression,
2102 sizeof(cam->compression)))
2103 return -EFAULT;
2104
2105 return 0;
2106 }
2107
2108
2109 static int
2110 et61x251_vidioc_s_jpegcomp(struct et61x251_device* cam, void __user * arg)
2111 {
2112 struct v4l2_jpegcompression jc;
2113 const enum et61x251_stream_state stream = cam->stream;
2114 int err = 0;
2115
2116 if (copy_from_user(&jc, arg, sizeof(jc)))
2117 return -EFAULT;
2118
2119 if (jc.quality != 0 && jc.quality != 1)
2120 return -EINVAL;
2121
2122 if (cam->stream == STREAM_ON)
2123 if ((err = et61x251_stream_interrupt(cam)))
2124 return err;
2125
2126 err += et61x251_set_compression(cam, &jc);
2127 if (err) { /* atomic, no rollback in ioctl() */
2128 cam->state |= DEV_MISCONFIGURED;
2129 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2130 "problems. To use the camera, close and open "
2131 "/dev/video%d again.", cam->v4ldev->num);
2132 return -EIO;
2133 }
2134
2135 cam->compression.quality = jc.quality;
2136
2137 cam->stream = stream;
2138
2139 return 0;
2140 }
2141
2142
2143 static int
2144 et61x251_vidioc_reqbufs(struct et61x251_device* cam, void __user * arg)
2145 {
2146 struct v4l2_requestbuffers rb;
2147 u32 i;
2148 int err;
2149
2150 if (copy_from_user(&rb, arg, sizeof(rb)))
2151 return -EFAULT;
2152
2153 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2154 rb.memory != V4L2_MEMORY_MMAP)
2155 return -EINVAL;
2156
2157 if (cam->io == IO_READ) {
2158 DBG(3, "Close and open the device again to choose the mmap "
2159 "I/O method");
2160 return -EBUSY;
2161 }
2162
2163 for (i = 0; i < cam->nbuffers; i++)
2164 if (cam->frame[i].vma_use_count) {
2165 DBG(3, "VIDIOC_REQBUFS failed. "
2166 "Previous buffers are still mapped.");
2167 return -EBUSY;
2168 }
2169
2170 if (cam->stream == STREAM_ON)
2171 if ((err = et61x251_stream_interrupt(cam)))
2172 return err;
2173
2174 et61x251_empty_framequeues(cam);
2175
2176 et61x251_release_buffers(cam);
2177 if (rb.count)
2178 rb.count = et61x251_request_buffers(cam, rb.count, IO_MMAP);
2179
2180 if (copy_to_user(arg, &rb, sizeof(rb))) {
2181 et61x251_release_buffers(cam);
2182 cam->io = IO_NONE;
2183 return -EFAULT;
2184 }
2185
2186 cam->io = rb.count ? IO_MMAP : IO_NONE;
2187
2188 return 0;
2189 }
2190
2191
2192 static int
2193 et61x251_vidioc_querybuf(struct et61x251_device* cam, void __user * arg)
2194 {
2195 struct v4l2_buffer b;
2196
2197 if (copy_from_user(&b, arg, sizeof(b)))
2198 return -EFAULT;
2199
2200 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2201 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2202 return -EINVAL;
2203
2204 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2205
2206 if (cam->frame[b.index].vma_use_count)
2207 b.flags |= V4L2_BUF_FLAG_MAPPED;
2208
2209 if (cam->frame[b.index].state == F_DONE)
2210 b.flags |= V4L2_BUF_FLAG_DONE;
2211 else if (cam->frame[b.index].state != F_UNUSED)
2212 b.flags |= V4L2_BUF_FLAG_QUEUED;
2213
2214 if (copy_to_user(arg, &b, sizeof(b)))
2215 return -EFAULT;
2216
2217 return 0;
2218 }
2219
2220
2221 static int
2222 et61x251_vidioc_qbuf(struct et61x251_device* cam, void __user * arg)
2223 {
2224 struct v4l2_buffer b;
2225 unsigned long lock_flags;
2226
2227 if (copy_from_user(&b, arg, sizeof(b)))
2228 return -EFAULT;
2229
2230 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2231 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2232 return -EINVAL;
2233
2234 if (cam->frame[b.index].state != F_UNUSED)
2235 return -EINVAL;
2236
2237 cam->frame[b.index].state = F_QUEUED;
2238
2239 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2240 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2241 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2242
2243 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2244
2245 return 0;
2246 }
2247
2248
2249 static int
2250 et61x251_vidioc_dqbuf(struct et61x251_device* cam, struct file* filp,
2251 void __user * arg)
2252 {
2253 struct v4l2_buffer b;
2254 struct et61x251_frame_t *f;
2255 unsigned long lock_flags;
2256 long timeout;
2257
2258 if (copy_from_user(&b, arg, sizeof(b)))
2259 return -EFAULT;
2260
2261 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
2262 return -EINVAL;
2263
2264 if (list_empty(&cam->outqueue)) {
2265 if (cam->stream == STREAM_OFF)
2266 return -EINVAL;
2267 if (filp->f_flags & O_NONBLOCK)
2268 return -EAGAIN;
2269 timeout = wait_event_interruptible_timeout
2270 ( cam->wait_frame,
2271 (!list_empty(&cam->outqueue)) ||
2272 (cam->state & DEV_DISCONNECTED) ||
2273 (cam->state & DEV_MISCONFIGURED),
2274 cam->module_param.frame_timeout *
2275 1000 * msecs_to_jiffies(1) );
2276 if (timeout < 0)
2277 return timeout;
2278 if (cam->state & DEV_DISCONNECTED)
2279 return -ENODEV;
2280 if (!timeout || (cam->state & DEV_MISCONFIGURED))
2281 return -EIO;
2282 }
2283
2284 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2285 f = list_entry(cam->outqueue.next, struct et61x251_frame_t, frame);
2286 list_del(cam->outqueue.next);
2287 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2288
2289 f->state = F_UNUSED;
2290
2291 memcpy(&b, &f->buf, sizeof(b));
2292 if (f->vma_use_count)
2293 b.flags |= V4L2_BUF_FLAG_MAPPED;
2294
2295 if (copy_to_user(arg, &b, sizeof(b)))
2296 return -EFAULT;
2297
2298 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2299
2300 return 0;
2301 }
2302
2303
2304 static int
2305 et61x251_vidioc_streamon(struct et61x251_device* cam, void __user * arg)
2306 {
2307 int type;
2308
2309 if (copy_from_user(&type, arg, sizeof(type)))
2310 return -EFAULT;
2311
2312 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2313 return -EINVAL;
2314
2315 cam->stream = STREAM_ON;
2316
2317 DBG(3, "Stream on");
2318
2319 return 0;
2320 }
2321
2322
2323 static int
2324 et61x251_vidioc_streamoff(struct et61x251_device* cam, void __user * arg)
2325 {
2326 int type, err;
2327
2328 if (copy_from_user(&type, arg, sizeof(type)))
2329 return -EFAULT;
2330
2331 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2332 return -EINVAL;
2333
2334 if (cam->stream == STREAM_ON)
2335 if ((err = et61x251_stream_interrupt(cam)))
2336 return err;
2337
2338 et61x251_empty_framequeues(cam);
2339
2340 DBG(3, "Stream off");
2341
2342 return 0;
2343 }
2344
2345
2346 static int
2347 et61x251_vidioc_g_parm(struct et61x251_device* cam, void __user * arg)
2348 {
2349 struct v4l2_streamparm sp;
2350
2351 if (copy_from_user(&sp, arg, sizeof(sp)))
2352 return -EFAULT;
2353
2354 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2355 return -EINVAL;
2356
2357 sp.parm.capture.extendedmode = 0;
2358 sp.parm.capture.readbuffers = cam->nreadbuffers;
2359
2360 if (copy_to_user(arg, &sp, sizeof(sp)))
2361 return -EFAULT;
2362
2363 return 0;
2364 }
2365
2366
2367 static int
2368 et61x251_vidioc_s_parm(struct et61x251_device* cam, void __user * arg)
2369 {
2370 struct v4l2_streamparm sp;
2371
2372 if (copy_from_user(&sp, arg, sizeof(sp)))
2373 return -EFAULT;
2374
2375 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2376 return -EINVAL;
2377
2378 sp.parm.capture.extendedmode = 0;
2379
2380 if (sp.parm.capture.readbuffers == 0)
2381 sp.parm.capture.readbuffers = cam->nreadbuffers;
2382
2383 if (sp.parm.capture.readbuffers > ET61X251_MAX_FRAMES)
2384 sp.parm.capture.readbuffers = ET61X251_MAX_FRAMES;
2385
2386 if (copy_to_user(arg, &sp, sizeof(sp)))
2387 return -EFAULT;
2388
2389 cam->nreadbuffers = sp.parm.capture.readbuffers;
2390
2391 return 0;
2392 }
2393
2394
2395 static long et61x251_ioctl_v4l2(struct file *filp,
2396 unsigned int cmd, void __user *arg)
2397 {
2398 struct et61x251_device *cam = video_drvdata(filp);
2399
2400 switch (cmd) {
2401
2402 case VIDIOC_QUERYCAP:
2403 return et61x251_vidioc_querycap(cam, arg);
2404
2405 case VIDIOC_ENUMINPUT:
2406 return et61x251_vidioc_enuminput(cam, arg);
2407
2408 case VIDIOC_G_INPUT:
2409 return et61x251_vidioc_g_input(cam, arg);
2410
2411 case VIDIOC_S_INPUT:
2412 return et61x251_vidioc_s_input(cam, arg);
2413
2414 case VIDIOC_QUERYCTRL:
2415 return et61x251_vidioc_query_ctrl(cam, arg);
2416
2417 case VIDIOC_G_CTRL:
2418 return et61x251_vidioc_g_ctrl(cam, arg);
2419
2420 case VIDIOC_S_CTRL:
2421 return et61x251_vidioc_s_ctrl(cam, arg);
2422
2423 case VIDIOC_CROPCAP:
2424 return et61x251_vidioc_cropcap(cam, arg);
2425
2426 case VIDIOC_G_CROP:
2427 return et61x251_vidioc_g_crop(cam, arg);
2428
2429 case VIDIOC_S_CROP:
2430 return et61x251_vidioc_s_crop(cam, arg);
2431
2432 case VIDIOC_ENUM_FMT:
2433 return et61x251_vidioc_enum_fmt(cam, arg);
2434
2435 case VIDIOC_G_FMT:
2436 return et61x251_vidioc_g_fmt(cam, arg);
2437
2438 case VIDIOC_TRY_FMT:
2439 case VIDIOC_S_FMT:
2440 return et61x251_vidioc_try_s_fmt(cam, cmd, arg);
2441
2442 case VIDIOC_ENUM_FRAMESIZES:
2443 return et61x251_vidioc_enum_framesizes(cam, arg);
2444
2445 case VIDIOC_G_JPEGCOMP:
2446 return et61x251_vidioc_g_jpegcomp(cam, arg);
2447
2448 case VIDIOC_S_JPEGCOMP:
2449 return et61x251_vidioc_s_jpegcomp(cam, arg);
2450
2451 case VIDIOC_REQBUFS:
2452 return et61x251_vidioc_reqbufs(cam, arg);
2453
2454 case VIDIOC_QUERYBUF:
2455 return et61x251_vidioc_querybuf(cam, arg);
2456
2457 case VIDIOC_QBUF:
2458 return et61x251_vidioc_qbuf(cam, arg);
2459
2460 case VIDIOC_DQBUF:
2461 return et61x251_vidioc_dqbuf(cam, filp, arg);
2462
2463 case VIDIOC_STREAMON:
2464 return et61x251_vidioc_streamon(cam, arg);
2465
2466 case VIDIOC_STREAMOFF:
2467 return et61x251_vidioc_streamoff(cam, arg);
2468
2469 case VIDIOC_G_PARM:
2470 return et61x251_vidioc_g_parm(cam, arg);
2471
2472 case VIDIOC_S_PARM:
2473 return et61x251_vidioc_s_parm(cam, arg);
2474
2475 case VIDIOC_G_STD:
2476 case VIDIOC_S_STD:
2477 case VIDIOC_QUERYSTD:
2478 case VIDIOC_ENUMSTD:
2479 case VIDIOC_QUERYMENU:
2480 case VIDIOC_ENUM_FRAMEINTERVALS:
2481 return -EINVAL;
2482
2483 default:
2484 return -EINVAL;
2485
2486 }
2487 }
2488
2489
2490 static long et61x251_ioctl(struct file *filp,
2491 unsigned int cmd, unsigned long arg)
2492 {
2493 struct et61x251_device *cam = video_drvdata(filp);
2494 long err = 0;
2495
2496 if (mutex_lock_interruptible(&cam->fileop_mutex))
2497 return -ERESTARTSYS;
2498
2499 if (cam->state & DEV_DISCONNECTED) {
2500 DBG(1, "Device not present");
2501 mutex_unlock(&cam->fileop_mutex);
2502 return -ENODEV;
2503 }
2504
2505 if (cam->state & DEV_MISCONFIGURED) {
2506 DBG(1, "The camera is misconfigured. Close and open it "
2507 "again.");
2508 mutex_unlock(&cam->fileop_mutex);
2509 return -EIO;
2510 }
2511
2512 V4LDBG(3, "et61x251", cmd);
2513
2514 err = et61x251_ioctl_v4l2(filp, cmd, (void __user *)arg);
2515
2516 mutex_unlock(&cam->fileop_mutex);
2517
2518 return err;
2519 }
2520
2521
2522 static const struct v4l2_file_operations et61x251_fops = {
2523 .owner = THIS_MODULE,
2524 .open = et61x251_open,
2525 .release = et61x251_release,
2526 .ioctl = et61x251_ioctl,
2527 .read = et61x251_read,
2528 .poll = et61x251_poll,
2529 .mmap = et61x251_mmap,
2530 };
2531
2532 /*****************************************************************************/
2533
2534 /* It exists a single interface only. We do not need to validate anything. */
2535 static int
2536 et61x251_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
2537 {
2538 struct usb_device *udev = interface_to_usbdev(intf);
2539 struct et61x251_device* cam;
2540 static unsigned int dev_nr;
2541 unsigned int i;
2542 int err = 0;
2543
2544 if (!(cam = kzalloc(sizeof(struct et61x251_device), GFP_KERNEL)))
2545 return -ENOMEM;
2546
2547 cam->usbdev = udev;
2548
2549 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
2550 DBG(1, "kmalloc() failed");
2551 err = -ENOMEM;
2552 goto fail;
2553 }
2554
2555 if (!(cam->v4ldev = video_device_alloc())) {
2556 DBG(1, "video_device_alloc() failed");
2557 err = -ENOMEM;
2558 goto fail;
2559 }
2560
2561 DBG(2, "ET61X[12]51 PC Camera Controller detected "
2562 "(vid/pid 0x%04X:0x%04X)",id->idVendor, id->idProduct);
2563
2564 for (i = 0; et61x251_sensor_table[i]; i++) {
2565 err = et61x251_sensor_table[i](cam);
2566 if (!err)
2567 break;
2568 }
2569
2570 if (!err)
2571 DBG(2, "%s image sensor detected", cam->sensor.name);
2572 else {
2573 DBG(1, "No supported image sensor detected");
2574 err = -ENODEV;
2575 goto fail;
2576 }
2577
2578 if (et61x251_init(cam)) {
2579 DBG(1, "Initialization failed. I will retry on open().");
2580 cam->state |= DEV_MISCONFIGURED;
2581 }
2582
2583 strcpy(cam->v4ldev->name, "ET61X[12]51 PC Camera");
2584 cam->v4ldev->fops = &et61x251_fops;
2585 cam->v4ldev->minor = video_nr[dev_nr];
2586 cam->v4ldev->release = video_device_release;
2587 cam->v4ldev->parent = &udev->dev;
2588 video_set_drvdata(cam->v4ldev, cam);
2589
2590 init_completion(&cam->probe);
2591
2592 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
2593 video_nr[dev_nr]);
2594 if (err) {
2595 DBG(1, "V4L2 device registration failed");
2596 if (err == -ENFILE && video_nr[dev_nr] == -1)
2597 DBG(1, "Free /dev/videoX node not found");
2598 video_nr[dev_nr] = -1;
2599 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2600 complete_all(&cam->probe);
2601 goto fail;
2602 }
2603
2604 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->num);
2605
2606 cam->module_param.force_munmap = force_munmap[dev_nr];
2607 cam->module_param.frame_timeout = frame_timeout[dev_nr];
2608
2609 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2610
2611 #ifdef CONFIG_VIDEO_ADV_DEBUG
2612 err = et61x251_create_sysfs(cam);
2613 if (!err)
2614 DBG(2, "Optional device control through 'sysfs' "
2615 "interface ready");
2616 else
2617 DBG(2, "Failed to create 'sysfs' interface for optional "
2618 "device controlling. Error #%d", err);
2619 #else
2620 DBG(2, "Optional device control through 'sysfs' interface disabled");
2621 DBG(3, "Compile the kernel with the 'CONFIG_VIDEO_ADV_DEBUG' "
2622 "configuration option to enable it.");
2623 #endif
2624
2625 usb_set_intfdata(intf, cam);
2626 kref_init(&cam->kref);
2627 usb_get_dev(cam->usbdev);
2628
2629 complete_all(&cam->probe);
2630
2631 return 0;
2632
2633 fail:
2634 if (cam) {
2635 kfree(cam->control_buffer);
2636 if (cam->v4ldev)
2637 video_device_release(cam->v4ldev);
2638 kfree(cam);
2639 }
2640 return err;
2641 }
2642
2643
2644 static void et61x251_usb_disconnect(struct usb_interface* intf)
2645 {
2646 struct et61x251_device* cam;
2647
2648 down_write(&et61x251_dev_lock);
2649
2650 cam = usb_get_intfdata(intf);
2651
2652 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
2653
2654 if (cam->users) {
2655 DBG(2, "Device /dev/video%d is open! Deregistration and "
2656 "memory deallocation are deferred.",
2657 cam->v4ldev->num);
2658 cam->state |= DEV_MISCONFIGURED;
2659 et61x251_stop_transfer(cam);
2660 cam->state |= DEV_DISCONNECTED;
2661 wake_up_interruptible(&cam->wait_frame);
2662 wake_up(&cam->wait_stream);
2663 } else
2664 cam->state |= DEV_DISCONNECTED;
2665
2666 wake_up_interruptible_all(&cam->wait_open);
2667
2668 kref_put(&cam->kref, et61x251_release_resources);
2669
2670 up_write(&et61x251_dev_lock);
2671 }
2672
2673
2674 static struct usb_driver et61x251_usb_driver = {
2675 .name = "et61x251",
2676 .id_table = et61x251_id_table,
2677 .probe = et61x251_usb_probe,
2678 .disconnect = et61x251_usb_disconnect,
2679 };
2680
2681 /*****************************************************************************/
2682
2683 static int __init et61x251_module_init(void)
2684 {
2685 int err = 0;
2686
2687 KDBG(2, ET61X251_MODULE_NAME " v" ET61X251_MODULE_VERSION);
2688 KDBG(3, ET61X251_MODULE_AUTHOR);
2689
2690 if ((err = usb_register(&et61x251_usb_driver)))
2691 KDBG(1, "usb_register() failed");
2692
2693 return err;
2694 }
2695
2696
2697 static void __exit et61x251_module_exit(void)
2698 {
2699 usb_deregister(&et61x251_usb_driver);
2700 }
2701
2702
2703 module_init(et61x251_module_init);
2704 module_exit(et61x251_module_exit);
Linux kernel - Deliverables
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