?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[PATCH] mark struct file_operations const 4
[linux-2.6/sactl.git] / drivers / media / video / et61x251 / et61x251_core.c
blob49792ae8c61c15253b291a0d63e3058e1e3f936f
1 /***************************************************************************
2 * V4L2 driver for ET61X[12]51 PC Camera Controllers *
3 * *
4 * Copyright (C) 2006 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/moduleparam.h>
26 #include <linux/errno.h>
27 #include <linux/slab.h>
28 #include <linux/device.h>
29 #include <linux/fs.h>
30 #include <linux/delay.h>
31 #include <linux/compiler.h>
32 #include <linux/ioctl.h>
33 #include <linux/poll.h>
34 #include <linux/stat.h>
35 #include <linux/mm.h>
36 #include <linux/vmalloc.h>
37 #include <linux/page-flags.h>
38 #include <linux/byteorder/generic.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 Luca Risolia"
49 #define ET61X251_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
50 #define ET61X251_MODULE_LICENSE "GPL"
51 #define ET61X251_MODULE_VERSION "1:1.02"
52 #define ET61X251_MODULE_VERSION_CODE KERNEL_VERSION(1, 0, 2)
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(SN9C102_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(cam->nbuffers * PAGE_ALIGN(imagesize))))
137 break;
138 cam->nbuffers--;
139 }
140
141 for (i = 0; i < cam->nbuffers; i++) {
142 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
143 cam->frame[i].buf.index = i;
144 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
145 cam->frame[i].buf.length = imagesize;
146 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
147 cam->frame[i].buf.sequence = 0;
148 cam->frame[i].buf.field = V4L2_FIELD_NONE;
149 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
150 cam->frame[i].buf.flags = 0;
151 }
152
153 return cam->nbuffers;
154 }
155
156
157 static void et61x251_release_buffers(struct et61x251_device* cam)
158 {
159 if (cam->nbuffers) {
160 vfree(cam->frame[0].bufmem);
161 cam->nbuffers = 0;
162 }
163 cam->frame_current = NULL;
164 }
165
166
167 static void et61x251_empty_framequeues(struct et61x251_device* cam)
168 {
169 u32 i;
170
171 INIT_LIST_HEAD(&cam->inqueue);
172 INIT_LIST_HEAD(&cam->outqueue);
173
174 for (i = 0; i < ET61X251_MAX_FRAMES; i++) {
175 cam->frame[i].state = F_UNUSED;
176 cam->frame[i].buf.bytesused = 0;
177 }
178 }
179
180
181 static void et61x251_requeue_outqueue(struct et61x251_device* cam)
182 {
183 struct et61x251_frame_t *i;
184
185 list_for_each_entry(i, &cam->outqueue, frame) {
186 i->state = F_QUEUED;
187 list_add(&i->frame, &cam->inqueue);
188 }
189
190 INIT_LIST_HEAD(&cam->outqueue);
191 }
192
193
194 static void et61x251_queue_unusedframes(struct et61x251_device* cam)
195 {
196 unsigned long lock_flags;
197 u32 i;
198
199 for (i = 0; i < cam->nbuffers; i++)
200 if (cam->frame[i].state == F_UNUSED) {
201 cam->frame[i].state = F_QUEUED;
202 spin_lock_irqsave(&cam->queue_lock, lock_flags);
203 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
204 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
205 }
206 }
207
208 /*****************************************************************************/
209
210 int et61x251_write_reg(struct et61x251_device* cam, u8 value, u16 index)
211 {
212 struct usb_device* udev = cam->usbdev;
213 u8* buff = cam->control_buffer;
214 int res;
215
216 *buff = value;
217
218 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
219 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
220 if (res < 0) {
221 DBG(3, "Failed to write a register (value 0x%02X, index "
222 "0x%02X, error %d)", value, index, res);
223 return -1;
224 }
225
226 return 0;
227 }
228
229
230 int et61x251_read_reg(struct et61x251_device* cam, u16 index)
231 {
232 struct usb_device* udev = cam->usbdev;
233 u8* buff = cam->control_buffer;
234 int res;
235
236 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
237 0, index, buff, 1, ET61X251_CTRL_TIMEOUT);
238 if (res < 0)
239 DBG(3, "Failed to read a register (index 0x%02X, error %d)",
240 index, res);
241
242 return (res >= 0) ? (int)(*buff) : -1;
243 }
244
245
246 static int
247 et61x251_i2c_wait(struct et61x251_device* cam, struct et61x251_sensor* sensor)
248 {
249 int i, r;
250
251 for (i = 1; i <= 8; i++) {
252 if (sensor->interface == ET61X251_I2C_3WIRES) {
253 r = et61x251_read_reg(cam, 0x8e);
254 if (!(r & 0x02) && (r >= 0))
255 return 0;
256 } else {
257 r = et61x251_read_reg(cam, 0x8b);
258 if (!(r & 0x01) && (r >= 0))
259 return 0;
260 }
261 if (r < 0)
262 return -EIO;
263 udelay(8*8); /* minimum for sensors at 400kHz */
264 }
265
266 return -EBUSY;
267 }
268
269
270 int
271 et61x251_i2c_try_read(struct et61x251_device* cam,
272 struct et61x251_sensor* sensor, u8 address)
273 {
274 struct usb_device* udev = cam->usbdev;
275 u8* data = cam->control_buffer;
276 int err = 0, res;
277
278 data[0] = address;
279 data[1] = cam->sensor.i2c_slave_id;
280 data[2] = cam->sensor.rsta | 0x10;
281 data[3] = !(et61x251_read_reg(cam, 0x8b) & 0x02);
282 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
283 0, 0x88, data, 4, ET61X251_CTRL_TIMEOUT);
284 if (res < 0)
285 err += res;
286
287 err += et61x251_i2c_wait(cam, sensor);
288
289 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x00, 0xc1,
290 0, 0x80, data, 8, ET61X251_CTRL_TIMEOUT);
291 if (res < 0)
292 err += res;
293
294 if (err)
295 DBG(3, "I2C read failed for %s image sensor", sensor->name);
296
297 PDBGG("I2C read: address 0x%02X, value: 0x%02X", address, data[0]);
298
299 return err ? -1 : (int)data[0];
300 }
301
302
303 int
304 et61x251_i2c_try_write(struct et61x251_device* cam,
305 struct et61x251_sensor* sensor, u8 address, u8 value)
306 {
307 struct usb_device* udev = cam->usbdev;
308 u8* data = cam->control_buffer;
309 int err = 0, res;
310
311 data[0] = address;
312 data[1] = cam->sensor.i2c_slave_id;
313 data[2] = cam->sensor.rsta | 0x12;
314 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
315 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
316 if (res < 0)
317 err += res;
318
319 data[0] = value;
320 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
321 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
322 if (res < 0)
323 err += res;
324
325 err += et61x251_i2c_wait(cam, sensor);
326
327 if (err)
328 DBG(3, "I2C write failed for %s image sensor", sensor->name);
329
330 PDBGG("I2C write: address 0x%02X, value: 0x%02X", address, value);
331
332 return err ? -1 : 0;
333 }
334
335
336 int
337 et61x251_i2c_raw_write(struct et61x251_device* cam, u8 n, u8 data1, u8 data2,
338 u8 data3, u8 data4, u8 data5, u8 data6, u8 data7,
339 u8 data8, u8 address)
340 {
341 struct usb_device* udev = cam->usbdev;
342 u8* data = cam->control_buffer;
343 int err = 0, res;
344
345 data[0] = data2;
346 data[1] = data3;
347 data[2] = data4;
348 data[3] = data5;
349 data[4] = data6;
350 data[5] = data7;
351 data[6] = data8;
352 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
353 0, 0x81, data, n-1, ET61X251_CTRL_TIMEOUT);
354 if (res < 0)
355 err += res;
356
357 data[0] = address;
358 data[1] = cam->sensor.i2c_slave_id;
359 data[2] = cam->sensor.rsta | 0x02 | (n << 4);
360 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
361 0, 0x88, data, 3, ET61X251_CTRL_TIMEOUT);
362 if (res < 0)
363 err += res;
364
365 /* Start writing through the serial interface */
366 data[0] = data1;
367 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x00, 0x41,
368 0, 0x80, data, 1, ET61X251_CTRL_TIMEOUT);
369 if (res < 0)
370 err += res;
371
372 err += et61x251_i2c_wait(cam, &cam->sensor);
373
374 if (err)
375 DBG(3, "I2C raw write failed for %s image sensor",
376 cam->sensor.name);
377
378 PDBGG("I2C raw write: %u bytes, address = 0x%02X, data1 = 0x%02X, "
379 "data2 = 0x%02X, data3 = 0x%02X, data4 = 0x%02X, data5 = 0x%02X,"
380 " data6 = 0x%02X, data7 = 0x%02X, data8 = 0x%02X", n, address,
381 data1, data2, data3, data4, data5, data6, data7, data8);
382
383 return err ? -1 : 0;
384
385 }
386
387
388 int et61x251_i2c_read(struct et61x251_device* cam, u8 address)
389 {
390 return et61x251_i2c_try_read(cam, &cam->sensor, address);
391 }
392
393
394 int et61x251_i2c_write(struct et61x251_device* cam, u8 address, u8 value)
395 {
396 return et61x251_i2c_try_write(cam, &cam->sensor, address, value);
397 }
398
399 /*****************************************************************************/
400
401 static void et61x251_urb_complete(struct urb *urb)
402 {
403 struct et61x251_device* cam = urb->context;
404 struct et61x251_frame_t** f;
405 size_t imagesize;
406 u8 i;
407 int err = 0;
408
409 if (urb->status == -ENOENT)
410 return;
411
412 f = &cam->frame_current;
413
414 if (cam->stream == STREAM_INTERRUPT) {
415 cam->stream = STREAM_OFF;
416 if ((*f))
417 (*f)->state = F_QUEUED;
418 DBG(3, "Stream interrupted");
419 wake_up(&cam->wait_stream);
420 }
421
422 if (cam->state & DEV_DISCONNECTED)
423 return;
424
425 if (cam->state & DEV_MISCONFIGURED) {
426 wake_up_interruptible(&cam->wait_frame);
427 return;
428 }
429
430 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
431 goto resubmit_urb;
432
433 if (!(*f))
434 (*f) = list_entry(cam->inqueue.next, struct et61x251_frame_t,
435 frame);
436
437 imagesize = (cam->sensor.pix_format.width *
438 cam->sensor.pix_format.height *
439 cam->sensor.pix_format.priv) / 8;
440
441 for (i = 0; i < urb->number_of_packets; i++) {
442 unsigned int len, status;
443 void *pos;
444 u8* b1, * b2, sof;
445 const u8 VOID_BYTES = 6;
446 size_t imglen;
447
448 len = urb->iso_frame_desc[i].actual_length;
449 status = urb->iso_frame_desc[i].status;
450 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
451
452 if (status) {
453 DBG(3, "Error in isochronous frame");
454 (*f)->state = F_ERROR;
455 continue;
456 }
457
458 b1 = pos++;
459 b2 = pos++;
460 sof = ((*b1 & 0x3f) == 63);
461 imglen = ((*b1 & 0xc0) << 2) | *b2;
462
463 PDBGG("Isochrnous frame: length %u, #%u i, image length %zu",
464 len, i, imglen);
465
466 if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR)
467 start_of_frame:
468 if (sof) {
469 (*f)->state = F_GRABBING;
470 (*f)->buf.bytesused = 0;
471 do_gettimeofday(&(*f)->buf.timestamp);
472 pos += 22;
473 DBG(3, "SOF detected: new video frame");
474 }
475
476 if ((*f)->state == F_GRABBING) {
477 if (sof && (*f)->buf.bytesused) {
478 if (cam->sensor.pix_format.pixelformat ==
479 V4L2_PIX_FMT_ET61X251)
480 goto end_of_frame;
481 else {
482 DBG(3, "Not expected SOF detected "
483 "after %lu bytes",
484 (unsigned long)(*f)->buf.bytesused);
485 (*f)->state = F_ERROR;
486 continue;
487 }
488 }
489
490 if ((*f)->buf.bytesused + imglen > imagesize) {
491 DBG(3, "Video frame size exceeded");
492 (*f)->state = F_ERROR;
493 continue;
494 }
495
496 pos += VOID_BYTES;
497
498 memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, imglen);
499 (*f)->buf.bytesused += imglen;
500
501 if ((*f)->buf.bytesused == imagesize) {
502 u32 b;
503 end_of_frame:
504 b = (*f)->buf.bytesused;
505 (*f)->state = F_DONE;
506 (*f)->buf.sequence= ++cam->frame_count;
507 spin_lock(&cam->queue_lock);
508 list_move_tail(&(*f)->frame, &cam->outqueue);
509 if (!list_empty(&cam->inqueue))
510 (*f) = list_entry(cam->inqueue.next,
511 struct et61x251_frame_t,
512 frame);
513 else
514 (*f) = NULL;
515 spin_unlock(&cam->queue_lock);
516 DBG(3, "Video frame captured: : %lu bytes",
517 (unsigned long)(b));
518
519 if (!(*f))
520 goto resubmit_urb;
521
522 if (sof &&
523 cam->sensor.pix_format.pixelformat ==
524 V4L2_PIX_FMT_ET61X251)
525 goto start_of_frame;
526 }
527 }
528 }
529
530 resubmit_urb:
531 urb->dev = cam->usbdev;
532 err = usb_submit_urb(urb, GFP_ATOMIC);
533 if (err < 0 && err != -EPERM) {
534 cam->state |= DEV_MISCONFIGURED;
535 DBG(1, "usb_submit_urb() failed");
536 }
537
538 wake_up_interruptible(&cam->wait_frame);
539 }
540
541
542 static int et61x251_start_transfer(struct et61x251_device* cam)
543 {
544 struct usb_device *udev = cam->usbdev;
545 struct urb* urb;
546 const unsigned int wMaxPacketSize[] = {0, 256, 384, 512, 640, 768, 832,
547 864, 896, 920, 956, 980, 1000,
548 1022};
549 const unsigned int psz = wMaxPacketSize[ET61X251_ALTERNATE_SETTING];
550 s8 i, j;
551 int err = 0;
552
553 for (i = 0; i < ET61X251_URBS; i++) {
554 cam->transfer_buffer[i] = kzalloc(ET61X251_ISO_PACKETS * psz,
555 GFP_KERNEL);
556 if (!cam->transfer_buffer[i]) {
557 err = -ENOMEM;
558 DBG(1, "Not enough memory");
559 goto free_buffers;
560 }
561 }
562
563 for (i = 0; i < ET61X251_URBS; i++) {
564 urb = usb_alloc_urb(ET61X251_ISO_PACKETS, GFP_KERNEL);
565 cam->urb[i] = urb;
566 if (!urb) {
567 err = -ENOMEM;
568 DBG(1, "usb_alloc_urb() failed");
569 goto free_urbs;
570 }
571 urb->dev = udev;
572 urb->context = cam;
573 urb->pipe = usb_rcvisocpipe(udev, 1);
574 urb->transfer_flags = URB_ISO_ASAP;
575 urb->number_of_packets = ET61X251_ISO_PACKETS;
576 urb->complete = et61x251_urb_complete;
577 urb->transfer_buffer = cam->transfer_buffer[i];
578 urb->transfer_buffer_length = psz * ET61X251_ISO_PACKETS;
579 urb->interval = 1;
580 for (j = 0; j < ET61X251_ISO_PACKETS; j++) {
581 urb->iso_frame_desc[j].offset = psz * j;
582 urb->iso_frame_desc[j].length = psz;
583 }
584 }
585
586 err = et61x251_write_reg(cam, 0x01, 0x03);
587 err = et61x251_write_reg(cam, 0x00, 0x03);
588 err = et61x251_write_reg(cam, 0x08, 0x03);
589 if (err) {
590 err = -EIO;
591 DBG(1, "I/O hardware error");
592 goto free_urbs;
593 }
594
595 err = usb_set_interface(udev, 0, ET61X251_ALTERNATE_SETTING);
596 if (err) {
597 DBG(1, "usb_set_interface() failed");
598 goto free_urbs;
599 }
600
601 cam->frame_current = NULL;
602
603 for (i = 0; i < ET61X251_URBS; i++) {
604 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
605 if (err) {
606 for (j = i-1; j >= 0; j--)
607 usb_kill_urb(cam->urb[j]);
608 DBG(1, "usb_submit_urb() failed, error %d", err);
609 goto free_urbs;
610 }
611 }
612
613 return 0;
614
615 free_urbs:
616 for (i = 0; (i < ET61X251_URBS) && cam->urb[i]; i++)
617 usb_free_urb(cam->urb[i]);
618
619 free_buffers:
620 for (i = 0; (i < ET61X251_URBS) && cam->transfer_buffer[i]; i++)
621 kfree(cam->transfer_buffer[i]);
622
623 return err;
624 }
625
626
627 static int et61x251_stop_transfer(struct et61x251_device* cam)
628 {
629 struct usb_device *udev = cam->usbdev;
630 s8 i;
631 int err = 0;
632
633 if (cam->state & DEV_DISCONNECTED)
634 return 0;
635
636 for (i = ET61X251_URBS-1; i >= 0; i--) {
637 usb_kill_urb(cam->urb[i]);
638 usb_free_urb(cam->urb[i]);
639 kfree(cam->transfer_buffer[i]);
640 }
641
642 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
643 if (err)
644 DBG(3, "usb_set_interface() failed");
645
646 return err;
647 }
648
649
650 static int et61x251_stream_interrupt(struct et61x251_device* cam)
651 {
652 long timeout;
653
654 cam->stream = STREAM_INTERRUPT;
655 timeout = wait_event_timeout(cam->wait_stream,
656 (cam->stream == STREAM_OFF) ||
657 (cam->state & DEV_DISCONNECTED),
658 ET61X251_URB_TIMEOUT);
659 if (cam->state & DEV_DISCONNECTED)
660 return -ENODEV;
661 else if (cam->stream != STREAM_OFF) {
662 cam->state |= DEV_MISCONFIGURED;
663 DBG(1, "URB timeout reached. The camera is misconfigured. To "
664 "use it, close and open /dev/video%d again.",
665 cam->v4ldev->minor);
666 return -EIO;
667 }
668
669 return 0;
670 }
671
672 /*****************************************************************************/
673
674 #ifdef CONFIG_VIDEO_ADV_DEBUG
675 static u8 et61x251_strtou8(const char* buff, size_t len, ssize_t* count)
676 {
677 char str[5];
678 char* endp;
679 unsigned long val;
680
681 if (len < 4) {
682 strncpy(str, buff, len);
683 str[len+1] = '\0';
684 } else {
685 strncpy(str, buff, 4);
686 str[4] = '\0';
687 }
688
689 val = simple_strtoul(str, &endp, 0);
690
691 *count = 0;
692 if (val <= 0xff)
693 *count = (ssize_t)(endp - str);
694 if ((*count) && (len == *count+1) && (buff[*count] == '\n'))
695 *count += 1;
696
697 return (u8)val;
698 }
699
700 /*
701 NOTE 1: being inside one of the following methods implies that the v4l
702 device exists for sure (see kobjects and reference counters)
703 NOTE 2: buffers are PAGE_SIZE long
704 */
705
706 static ssize_t et61x251_show_reg(struct class_device* cd, char* buf)
707 {
708 struct et61x251_device* cam;
709 ssize_t count;
710
711 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
712 return -ERESTARTSYS;
713
714 cam = video_get_drvdata(to_video_device(cd));
715 if (!cam) {
716 mutex_unlock(&et61x251_sysfs_lock);
717 return -ENODEV;
718 }
719
720 count = sprintf(buf, "%u\n", cam->sysfs.reg);
721
722 mutex_unlock(&et61x251_sysfs_lock);
723
724 return count;
725 }
726
727
728 static ssize_t
729 et61x251_store_reg(struct class_device* cd, const char* buf, size_t len)
730 {
731 struct et61x251_device* cam;
732 u8 index;
733 ssize_t count;
734
735 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
736 return -ERESTARTSYS;
737
738 cam = video_get_drvdata(to_video_device(cd));
739 if (!cam) {
740 mutex_unlock(&et61x251_sysfs_lock);
741 return -ENODEV;
742 }
743
744 index = et61x251_strtou8(buf, len, &count);
745 if (index > 0x8e || !count) {
746 mutex_unlock(&et61x251_sysfs_lock);
747 return -EINVAL;
748 }
749
750 cam->sysfs.reg = index;
751
752 DBG(2, "Moved ET61X[12]51 register index to 0x%02X", cam->sysfs.reg);
753 DBG(3, "Written bytes: %zd", count);
754
755 mutex_unlock(&et61x251_sysfs_lock);
756
757 return count;
758 }
759
760
761 static ssize_t et61x251_show_val(struct class_device* cd, char* buf)
762 {
763 struct et61x251_device* cam;
764 ssize_t count;
765 int val;
766
767 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
768 return -ERESTARTSYS;
769
770 cam = video_get_drvdata(to_video_device(cd));
771 if (!cam) {
772 mutex_unlock(&et61x251_sysfs_lock);
773 return -ENODEV;
774 }
775
776 if ((val = et61x251_read_reg(cam, cam->sysfs.reg)) < 0) {
777 mutex_unlock(&et61x251_sysfs_lock);
778 return -EIO;
779 }
780
781 count = sprintf(buf, "%d\n", val);
782
783 DBG(3, "Read bytes: %zd", count);
784
785 mutex_unlock(&et61x251_sysfs_lock);
786
787 return count;
788 }
789
790
791 static ssize_t
792 et61x251_store_val(struct class_device* cd, const char* buf, size_t len)
793 {
794 struct et61x251_device* cam;
795 u8 value;
796 ssize_t count;
797 int err;
798
799 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
800 return -ERESTARTSYS;
801
802 cam = video_get_drvdata(to_video_device(cd));
803 if (!cam) {
804 mutex_unlock(&et61x251_sysfs_lock);
805 return -ENODEV;
806 }
807
808 value = et61x251_strtou8(buf, len, &count);
809 if (!count) {
810 mutex_unlock(&et61x251_sysfs_lock);
811 return -EINVAL;
812 }
813
814 err = et61x251_write_reg(cam, value, cam->sysfs.reg);
815 if (err) {
816 mutex_unlock(&et61x251_sysfs_lock);
817 return -EIO;
818 }
819
820 DBG(2, "Written ET61X[12]51 reg. 0x%02X, val. 0x%02X",
821 cam->sysfs.reg, value);
822 DBG(3, "Written bytes: %zd", count);
823
824 mutex_unlock(&et61x251_sysfs_lock);
825
826 return count;
827 }
828
829
830 static ssize_t et61x251_show_i2c_reg(struct class_device* cd, char* buf)
831 {
832 struct et61x251_device* cam;
833 ssize_t count;
834
835 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
836 return -ERESTARTSYS;
837
838 cam = video_get_drvdata(to_video_device(cd));
839 if (!cam) {
840 mutex_unlock(&et61x251_sysfs_lock);
841 return -ENODEV;
842 }
843
844 count = sprintf(buf, "%u\n", cam->sysfs.i2c_reg);
845
846 DBG(3, "Read bytes: %zd", count);
847
848 mutex_unlock(&et61x251_sysfs_lock);
849
850 return count;
851 }
852
853
854 static ssize_t
855 et61x251_store_i2c_reg(struct class_device* cd, const char* buf, size_t len)
856 {
857 struct et61x251_device* cam;
858 u8 index;
859 ssize_t count;
860
861 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
862 return -ERESTARTSYS;
863
864 cam = video_get_drvdata(to_video_device(cd));
865 if (!cam) {
866 mutex_unlock(&et61x251_sysfs_lock);
867 return -ENODEV;
868 }
869
870 index = et61x251_strtou8(buf, len, &count);
871 if (!count) {
872 mutex_unlock(&et61x251_sysfs_lock);
873 return -EINVAL;
874 }
875
876 cam->sysfs.i2c_reg = index;
877
878 DBG(2, "Moved sensor register index to 0x%02X", cam->sysfs.i2c_reg);
879 DBG(3, "Written bytes: %zd", count);
880
881 mutex_unlock(&et61x251_sysfs_lock);
882
883 return count;
884 }
885
886
887 static ssize_t et61x251_show_i2c_val(struct class_device* cd, char* buf)
888 {
889 struct et61x251_device* cam;
890 ssize_t count;
891 int val;
892
893 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
894 return -ERESTARTSYS;
895
896 cam = video_get_drvdata(to_video_device(cd));
897 if (!cam) {
898 mutex_unlock(&et61x251_sysfs_lock);
899 return -ENODEV;
900 }
901
902 if (!(cam->sensor.sysfs_ops & ET61X251_I2C_READ)) {
903 mutex_unlock(&et61x251_sysfs_lock);
904 return -ENOSYS;
905 }
906
907 if ((val = et61x251_i2c_read(cam, cam->sysfs.i2c_reg)) < 0) {
908 mutex_unlock(&et61x251_sysfs_lock);
909 return -EIO;
910 }
911
912 count = sprintf(buf, "%d\n", val);
913
914 DBG(3, "Read bytes: %zd", count);
915
916 mutex_unlock(&et61x251_sysfs_lock);
917
918 return count;
919 }
920
921
922 static ssize_t
923 et61x251_store_i2c_val(struct class_device* cd, const char* buf, size_t len)
924 {
925 struct et61x251_device* cam;
926 u8 value;
927 ssize_t count;
928 int err;
929
930 if (mutex_lock_interruptible(&et61x251_sysfs_lock))
931 return -ERESTARTSYS;
932
933 cam = video_get_drvdata(to_video_device(cd));
934 if (!cam) {
935 mutex_unlock(&et61x251_sysfs_lock);
936 return -ENODEV;
937 }
938
939 if (!(cam->sensor.sysfs_ops & ET61X251_I2C_READ)) {
940 mutex_unlock(&et61x251_sysfs_lock);
941 return -ENOSYS;
942 }
943
944 value = et61x251_strtou8(buf, len, &count);
945 if (!count) {
946 mutex_unlock(&et61x251_sysfs_lock);
947 return -EINVAL;
948 }
949
950 err = et61x251_i2c_write(cam, cam->sysfs.i2c_reg, value);
951 if (err) {
952 mutex_unlock(&et61x251_sysfs_lock);
953 return -EIO;
954 }
955
956 DBG(2, "Written sensor reg. 0x%02X, val. 0x%02X",
957 cam->sysfs.i2c_reg, value);
958 DBG(3, "Written bytes: %zd", count);
959
960 mutex_unlock(&et61x251_sysfs_lock);
961
962 return count;
963 }
964
965
966 static CLASS_DEVICE_ATTR(reg, S_IRUGO | S_IWUSR,
967 et61x251_show_reg, et61x251_store_reg);
968 static CLASS_DEVICE_ATTR(val, S_IRUGO | S_IWUSR,
969 et61x251_show_val, et61x251_store_val);
970 static CLASS_DEVICE_ATTR(i2c_reg, S_IRUGO | S_IWUSR,
971 et61x251_show_i2c_reg, et61x251_store_i2c_reg);
972 static CLASS_DEVICE_ATTR(i2c_val, S_IRUGO | S_IWUSR,
973 et61x251_show_i2c_val, et61x251_store_i2c_val);
974
975
976 static int et61x251_create_sysfs(struct et61x251_device* cam)
977 {
978 struct video_device *v4ldev = cam->v4ldev;
979 int rc;
980
981 rc = video_device_create_file(v4ldev, &class_device_attr_reg);
982 if (rc) goto err;
983 rc = video_device_create_file(v4ldev, &class_device_attr_val);
984 if (rc) goto err_reg;
985 if (cam->sensor.sysfs_ops) {
986 rc = video_device_create_file(v4ldev, &class_device_attr_i2c_reg);
987 if (rc) goto err_val;
988 rc = video_device_create_file(v4ldev, &class_device_attr_i2c_val);
989 if (rc) goto err_i2c_reg;
990 }
991
992 return 0;
993
994 err_i2c_reg:
995 video_device_remove_file(v4ldev, &class_device_attr_i2c_reg);
996 err_val:
997 video_device_remove_file(v4ldev, &class_device_attr_val);
998 err_reg:
999 video_device_remove_file(v4ldev, &class_device_attr_reg);
1000 err:
1001 return rc;
1002 }
1003 #endif /* CONFIG_VIDEO_ADV_DEBUG */
1004
1005 /*****************************************************************************/
1006
1007 static int
1008 et61x251_set_pix_format(struct et61x251_device* cam,
1009 struct v4l2_pix_format* pix)
1010 {
1011 int r, err = 0;
1012
1013 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1014 err += r;
1015 if (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1016 err += et61x251_write_reg(cam, r & 0xfd, 0x12);
1017 else
1018 err += et61x251_write_reg(cam, r | 0x02, 0x12);
1019
1020 return err ? -EIO : 0;
1021 }
1022
1023
1024 static int
1025 et61x251_set_compression(struct et61x251_device* cam,
1026 struct v4l2_jpegcompression* compression)
1027 {
1028 int r, err = 0;
1029
1030 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1031 err += r;
1032 if (compression->quality == 0)
1033 err += et61x251_write_reg(cam, r & 0xfb, 0x12);
1034 else
1035 err += et61x251_write_reg(cam, r | 0x04, 0x12);
1036
1037 return err ? -EIO : 0;
1038 }
1039
1040
1041 static int et61x251_set_scale(struct et61x251_device* cam, u8 scale)
1042 {
1043 int r = 0, err = 0;
1044
1045 r = et61x251_read_reg(cam, 0x12);
1046 if (r < 0)
1047 err += r;
1048
1049 if (scale == 1)
1050 err += et61x251_write_reg(cam, r & ~0x01, 0x12);
1051 else if (scale == 2)
1052 err += et61x251_write_reg(cam, r | 0x01, 0x12);
1053
1054 if (err)
1055 return -EIO;
1056
1057 PDBGG("Scaling factor: %u", scale);
1058
1059 return 0;
1060 }
1061
1062
1063 static int
1064 et61x251_set_crop(struct et61x251_device* cam, struct v4l2_rect* rect)
1065 {
1066 struct et61x251_sensor* s = &cam->sensor;
1067 u16 fmw_sx = (u16)(rect->left - s->cropcap.bounds.left +
1068 s->active_pixel.left),
1069 fmw_sy = (u16)(rect->top - s->cropcap.bounds.top +
1070 s->active_pixel.top),
1071 fmw_length = (u16)(rect->width),
1072 fmw_height = (u16)(rect->height);
1073 int err = 0;
1074
1075 err += et61x251_write_reg(cam, fmw_sx & 0xff, 0x69);
1076 err += et61x251_write_reg(cam, fmw_sy & 0xff, 0x6a);
1077 err += et61x251_write_reg(cam, fmw_length & 0xff, 0x6b);
1078 err += et61x251_write_reg(cam, fmw_height & 0xff, 0x6c);
1079 err += et61x251_write_reg(cam, (fmw_sx >> 8) | ((fmw_sy & 0x300) >> 6)
1080 | ((fmw_length & 0x300) >> 4)
1081 | ((fmw_height & 0x300) >> 2), 0x6d);
1082 if (err)
1083 return -EIO;
1084
1085 PDBGG("fmw_sx, fmw_sy, fmw_length, fmw_height: %u %u %u %u",
1086 fmw_sx, fmw_sy, fmw_length, fmw_height);
1087
1088 return 0;
1089 }
1090
1091
1092 static int et61x251_init(struct et61x251_device* cam)
1093 {
1094 struct et61x251_sensor* s = &cam->sensor;
1095 struct v4l2_control ctrl;
1096 struct v4l2_queryctrl *qctrl;
1097 struct v4l2_rect* rect;
1098 u8 i = 0;
1099 int err = 0;
1100
1101 if (!(cam->state & DEV_INITIALIZED)) {
1102 init_waitqueue_head(&cam->open);
1103 qctrl = s->qctrl;
1104 rect = &(s->cropcap.defrect);
1105 cam->compression.quality = ET61X251_COMPRESSION_QUALITY;
1106 } else { /* use current values */
1107 qctrl = s->_qctrl;
1108 rect = &(s->_rect);
1109 }
1110
1111 err += et61x251_set_scale(cam, rect->width / s->pix_format.width);
1112 err += et61x251_set_crop(cam, rect);
1113 if (err)
1114 return err;
1115
1116 if (s->init) {
1117 err = s->init(cam);
1118 if (err) {
1119 DBG(3, "Sensor initialization failed");
1120 return err;
1121 }
1122 }
1123
1124 err += et61x251_set_compression(cam, &cam->compression);
1125 err += et61x251_set_pix_format(cam, &s->pix_format);
1126 if (s->set_pix_format)
1127 err += s->set_pix_format(cam, &s->pix_format);
1128 if (err)
1129 return err;
1130
1131 if (s->pix_format.pixelformat == V4L2_PIX_FMT_ET61X251)
1132 DBG(3, "Compressed video format is active, quality %d",
1133 cam->compression.quality);
1134 else
1135 DBG(3, "Uncompressed video format is active");
1136
1137 if (s->set_crop)
1138 if ((err = s->set_crop(cam, rect))) {
1139 DBG(3, "set_crop() failed");
1140 return err;
1141 }
1142
1143 if (s->set_ctrl) {
1144 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1145 if (s->qctrl[i].id != 0 &&
1146 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1147 ctrl.id = s->qctrl[i].id;
1148 ctrl.value = qctrl[i].default_value;
1149 err = s->set_ctrl(cam, &ctrl);
1150 if (err) {
1151 DBG(3, "Set %s control failed",
1152 s->qctrl[i].name);
1153 return err;
1154 }
1155 DBG(3, "Image sensor supports '%s' control",
1156 s->qctrl[i].name);
1157 }
1158 }
1159
1160 if (!(cam->state & DEV_INITIALIZED)) {
1161 mutex_init(&cam->fileop_mutex);
1162 spin_lock_init(&cam->queue_lock);
1163 init_waitqueue_head(&cam->wait_frame);
1164 init_waitqueue_head(&cam->wait_stream);
1165 cam->nreadbuffers = 2;
1166 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
1167 memcpy(&(s->_rect), &(s->cropcap.defrect),
1168 sizeof(struct v4l2_rect));
1169 cam->state |= DEV_INITIALIZED;
1170 }
1171
1172 DBG(2, "Initialization succeeded");
1173 return 0;
1174 }
1175
1176
1177 static void et61x251_release_resources(struct et61x251_device* cam)
1178 {
1179 mutex_lock(&et61x251_sysfs_lock);
1180
1181 DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor);
1182 video_set_drvdata(cam->v4ldev, NULL);
1183 video_unregister_device(cam->v4ldev);
1184
1185 mutex_unlock(&et61x251_sysfs_lock);
1186
1187 kfree(cam->control_buffer);
1188 }
1189
1190 /*****************************************************************************/
1191
1192 static int et61x251_open(struct inode* inode, struct file* filp)
1193 {
1194 struct et61x251_device* cam;
1195 int err = 0;
1196
1197 /*
1198 This is the only safe way to prevent race conditions with
1199 disconnect
1200 */
1201 if (!down_read_trylock(&et61x251_disconnect))
1202 return -ERESTARTSYS;
1203
1204 cam = video_get_drvdata(video_devdata(filp));
1205
1206 if (mutex_lock_interruptible(&cam->dev_mutex)) {
1207 up_read(&et61x251_disconnect);
1208 return -ERESTARTSYS;
1209 }
1210
1211 if (cam->users) {
1212 DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor);
1213 if ((filp->f_flags & O_NONBLOCK) ||
1214 (filp->f_flags & O_NDELAY)) {
1215 err = -EWOULDBLOCK;
1216 goto out;
1217 }
1218 mutex_unlock(&cam->dev_mutex);
1219 err = wait_event_interruptible_exclusive(cam->open,
1220 cam->state & DEV_DISCONNECTED
1221 || !cam->users);
1222 if (err) {
1223 up_read(&et61x251_disconnect);
1224 return err;
1225 }
1226 if (cam->state & DEV_DISCONNECTED) {
1227 up_read(&et61x251_disconnect);
1228 return -ENODEV;
1229 }
1230 mutex_lock(&cam->dev_mutex);
1231 }
1232
1233
1234 if (cam->state & DEV_MISCONFIGURED) {
1235 err = et61x251_init(cam);
1236 if (err) {
1237 DBG(1, "Initialization failed again. "
1238 "I will retry on next open().");
1239 goto out;
1240 }
1241 cam->state &= ~DEV_MISCONFIGURED;
1242 }
1243
1244 if ((err = et61x251_start_transfer(cam)))
1245 goto out;
1246
1247 filp->private_data = cam;
1248 cam->users++;
1249 cam->io = IO_NONE;
1250 cam->stream = STREAM_OFF;
1251 cam->nbuffers = 0;
1252 cam->frame_count = 0;
1253 et61x251_empty_framequeues(cam);
1254
1255 DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor);
1256
1257 out:
1258 mutex_unlock(&cam->dev_mutex);
1259 up_read(&et61x251_disconnect);
1260 return err;
1261 }
1262
1263
1264 static int et61x251_release(struct inode* inode, struct file* filp)
1265 {
1266 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1267
1268 mutex_lock(&cam->dev_mutex); /* prevent disconnect() to be called */
1269
1270 et61x251_stop_transfer(cam);
1271
1272 et61x251_release_buffers(cam);
1273
1274 if (cam->state & DEV_DISCONNECTED) {
1275 et61x251_release_resources(cam);
1276 usb_put_dev(cam->usbdev);
1277 mutex_unlock(&cam->dev_mutex);
1278 kfree(cam);
1279 return 0;
1280 }
1281
1282 cam->users--;
1283 wake_up_interruptible_nr(&cam->open, 1);
1284
1285 DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor);
1286
1287 mutex_unlock(&cam->dev_mutex);
1288
1289 return 0;
1290 }
1291
1292
1293 static ssize_t
1294 et61x251_read(struct file* filp, char __user * buf,
1295 size_t count, loff_t* f_pos)
1296 {
1297 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1298 struct et61x251_frame_t* f, * i;
1299 unsigned long lock_flags;
1300 long timeout;
1301 int err = 0;
1302
1303 if (mutex_lock_interruptible(&cam->fileop_mutex))
1304 return -ERESTARTSYS;
1305
1306 if (cam->state & DEV_DISCONNECTED) {
1307 DBG(1, "Device not present");
1308 mutex_unlock(&cam->fileop_mutex);
1309 return -ENODEV;
1310 }
1311
1312 if (cam->state & DEV_MISCONFIGURED) {
1313 DBG(1, "The camera is misconfigured. Close and open it "
1314 "again.");
1315 mutex_unlock(&cam->fileop_mutex);
1316 return -EIO;
1317 }
1318
1319 if (cam->io == IO_MMAP) {
1320 DBG(3, "Close and open the device again to choose the read "
1321 "method");
1322 mutex_unlock(&cam->fileop_mutex);
1323 return -EINVAL;
1324 }
1325
1326 if (cam->io == IO_NONE) {
1327 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1328 IO_READ)) {
1329 DBG(1, "read() failed, not enough memory");
1330 mutex_unlock(&cam->fileop_mutex);
1331 return -ENOMEM;
1332 }
1333 cam->io = IO_READ;
1334 cam->stream = STREAM_ON;
1335 }
1336
1337 if (list_empty(&cam->inqueue)) {
1338 if (!list_empty(&cam->outqueue))
1339 et61x251_empty_framequeues(cam);
1340 et61x251_queue_unusedframes(cam);
1341 }
1342
1343 if (!count) {
1344 mutex_unlock(&cam->fileop_mutex);
1345 return 0;
1346 }
1347
1348 if (list_empty(&cam->outqueue)) {
1349 if (filp->f_flags & O_NONBLOCK) {
1350 mutex_unlock(&cam->fileop_mutex);
1351 return -EAGAIN;
1352 }
1353 timeout = wait_event_interruptible_timeout
1354 ( cam->wait_frame,
1355 (!list_empty(&cam->outqueue)) ||
1356 (cam->state & DEV_DISCONNECTED) ||
1357 (cam->state & DEV_MISCONFIGURED),
1358 cam->module_param.frame_timeout *
1359 1000 * msecs_to_jiffies(1) );
1360 if (timeout < 0) {
1361 mutex_unlock(&cam->fileop_mutex);
1362 return timeout;
1363 }
1364 if (cam->state & DEV_DISCONNECTED) {
1365 mutex_unlock(&cam->fileop_mutex);
1366 return -ENODEV;
1367 }
1368 if (!timeout || (cam->state & DEV_MISCONFIGURED)) {
1369 mutex_unlock(&cam->fileop_mutex);
1370 return -EIO;
1371 }
1372 }
1373
1374 f = list_entry(cam->outqueue.prev, struct et61x251_frame_t, frame);
1375
1376 if (count > f->buf.bytesused)
1377 count = f->buf.bytesused;
1378
1379 if (copy_to_user(buf, f->bufmem, count)) {
1380 err = -EFAULT;
1381 goto exit;
1382 }
1383 *f_pos += count;
1384
1385 exit:
1386 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1387 list_for_each_entry(i, &cam->outqueue, frame)
1388 i->state = F_UNUSED;
1389 INIT_LIST_HEAD(&cam->outqueue);
1390 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1391
1392 et61x251_queue_unusedframes(cam);
1393
1394 PDBGG("Frame #%lu, bytes read: %zu",
1395 (unsigned long)f->buf.index, count);
1396
1397 mutex_unlock(&cam->fileop_mutex);
1398
1399 return err ? err : count;
1400 }
1401
1402
1403 static unsigned int et61x251_poll(struct file *filp, poll_table *wait)
1404 {
1405 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1406 struct et61x251_frame_t* f;
1407 unsigned long lock_flags;
1408 unsigned int mask = 0;
1409
1410 if (mutex_lock_interruptible(&cam->fileop_mutex))
1411 return POLLERR;
1412
1413 if (cam->state & DEV_DISCONNECTED) {
1414 DBG(1, "Device not present");
1415 goto error;
1416 }
1417
1418 if (cam->state & DEV_MISCONFIGURED) {
1419 DBG(1, "The camera is misconfigured. Close and open it "
1420 "again.");
1421 goto error;
1422 }
1423
1424 if (cam->io == IO_NONE) {
1425 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1426 IO_READ)) {
1427 DBG(1, "poll() failed, not enough memory");
1428 goto error;
1429 }
1430 cam->io = IO_READ;
1431 cam->stream = STREAM_ON;
1432 }
1433
1434 if (cam->io == IO_READ) {
1435 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1436 list_for_each_entry(f, &cam->outqueue, frame)
1437 f->state = F_UNUSED;
1438 INIT_LIST_HEAD(&cam->outqueue);
1439 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1440 et61x251_queue_unusedframes(cam);
1441 }
1442
1443 poll_wait(filp, &cam->wait_frame, wait);
1444
1445 if (!list_empty(&cam->outqueue))
1446 mask |= POLLIN | POLLRDNORM;
1447
1448 mutex_unlock(&cam->fileop_mutex);
1449
1450 return mask;
1451
1452 error:
1453 mutex_unlock(&cam->fileop_mutex);
1454 return POLLERR;
1455 }
1456
1457
1458 static void et61x251_vm_open(struct vm_area_struct* vma)
1459 {
1460 struct et61x251_frame_t* f = vma->vm_private_data;
1461 f->vma_use_count++;
1462 }
1463
1464
1465 static void et61x251_vm_close(struct vm_area_struct* vma)
1466 {
1467 /* NOTE: buffers are not freed here */
1468 struct et61x251_frame_t* f = vma->vm_private_data;
1469 f->vma_use_count--;
1470 }
1471
1472
1473 static struct vm_operations_struct et61x251_vm_ops = {
1474 .open = et61x251_vm_open,
1475 .close = et61x251_vm_close,
1476 };
1477
1478
1479 static int et61x251_mmap(struct file* filp, struct vm_area_struct *vma)
1480 {
1481 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1482 unsigned long size = vma->vm_end - vma->vm_start,
1483 start = vma->vm_start;
1484 void *pos;
1485 u32 i;
1486
1487 if (mutex_lock_interruptible(&cam->fileop_mutex))
1488 return -ERESTARTSYS;
1489
1490 if (cam->state & DEV_DISCONNECTED) {
1491 DBG(1, "Device not present");
1492 mutex_unlock(&cam->fileop_mutex);
1493 return -ENODEV;
1494 }
1495
1496 if (cam->state & DEV_MISCONFIGURED) {
1497 DBG(1, "The camera is misconfigured. Close and open it "
1498 "again.");
1499 mutex_unlock(&cam->fileop_mutex);
1500 return -EIO;
1501 }
1502
1503 if (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
1504 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
1505 mutex_unlock(&cam->fileop_mutex);
1506 return -EINVAL;
1507 }
1508
1509 for (i = 0; i < cam->nbuffers; i++) {
1510 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
1511 break;
1512 }
1513 if (i == cam->nbuffers) {
1514 mutex_unlock(&cam->fileop_mutex);
1515 return -EINVAL;
1516 }
1517
1518 vma->vm_flags |= VM_IO;
1519 vma->vm_flags |= VM_RESERVED;
1520
1521 pos = cam->frame[i].bufmem;
1522 while (size > 0) { /* size is page-aligned */
1523 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1524 mutex_unlock(&cam->fileop_mutex);
1525 return -EAGAIN;
1526 }
1527 start += PAGE_SIZE;
1528 pos += PAGE_SIZE;
1529 size -= PAGE_SIZE;
1530 }
1531
1532 vma->vm_ops = &et61x251_vm_ops;
1533 vma->vm_private_data = &cam->frame[i];
1534
1535 et61x251_vm_open(vma);
1536
1537 mutex_unlock(&cam->fileop_mutex);
1538
1539 return 0;
1540 }
1541
1542 /*****************************************************************************/
1543
1544 static int
1545 et61x251_vidioc_querycap(struct et61x251_device* cam, void __user * arg)
1546 {
1547 struct v4l2_capability cap = {
1548 .driver = "et61x251",
1549 .version = ET61X251_MODULE_VERSION_CODE,
1550 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1551 V4L2_CAP_STREAMING,
1552 };
1553
1554 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
1555 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
1556 strlcpy(cap.bus_info, cam->usbdev->dev.bus_id,
1557 sizeof(cap.bus_info));
1558
1559 if (copy_to_user(arg, &cap, sizeof(cap)))
1560 return -EFAULT;
1561
1562 return 0;
1563 }
1564
1565
1566 static int
1567 et61x251_vidioc_enuminput(struct et61x251_device* cam, void __user * arg)
1568 {
1569 struct v4l2_input i;
1570
1571 if (copy_from_user(&i, arg, sizeof(i)))
1572 return -EFAULT;
1573
1574 if (i.index)
1575 return -EINVAL;
1576
1577 memset(&i, 0, sizeof(i));
1578 strcpy(i.name, "Camera");
1579 i.type = V4L2_INPUT_TYPE_CAMERA;
1580
1581 if (copy_to_user(arg, &i, sizeof(i)))
1582 return -EFAULT;
1583
1584 return 0;
1585 }
1586
1587
1588 static int
1589 et61x251_vidioc_g_input(struct et61x251_device* cam, void __user * arg)
1590 {
1591 int index = 0;
1592
1593 if (copy_to_user(arg, &index, sizeof(index)))
1594 return -EFAULT;
1595
1596 return 0;
1597 }
1598
1599
1600 static int
1601 et61x251_vidioc_s_input(struct et61x251_device* cam, void __user * arg)
1602 {
1603 int index;
1604
1605 if (copy_from_user(&index, arg, sizeof(index)))
1606 return -EFAULT;
1607
1608 if (index != 0)
1609 return -EINVAL;
1610
1611 return 0;
1612 }
1613
1614
1615 static int
1616 et61x251_vidioc_query_ctrl(struct et61x251_device* cam, void __user * arg)
1617 {
1618 struct et61x251_sensor* s = &cam->sensor;
1619 struct v4l2_queryctrl qc;
1620 u8 i;
1621
1622 if (copy_from_user(&qc, arg, sizeof(qc)))
1623 return -EFAULT;
1624
1625 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1626 if (qc.id && qc.id == s->qctrl[i].id) {
1627 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1628 if (copy_to_user(arg, &qc, sizeof(qc)))
1629 return -EFAULT;
1630 return 0;
1631 }
1632
1633 return -EINVAL;
1634 }
1635
1636
1637 static int
1638 et61x251_vidioc_g_ctrl(struct et61x251_device* cam, void __user * arg)
1639 {
1640 struct et61x251_sensor* s = &cam->sensor;
1641 struct v4l2_control ctrl;
1642 int err = 0;
1643 u8 i;
1644
1645 if (!s->get_ctrl && !s->set_ctrl)
1646 return -EINVAL;
1647
1648 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1649 return -EFAULT;
1650
1651 if (!s->get_ctrl) {
1652 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1653 if (ctrl.id == s->qctrl[i].id) {
1654 ctrl.value = s->_qctrl[i].default_value;
1655 goto exit;
1656 }
1657 return -EINVAL;
1658 } else
1659 err = s->get_ctrl(cam, &ctrl);
1660
1661 exit:
1662 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1663 return -EFAULT;
1664
1665 return err;
1666 }
1667
1668
1669 static int
1670 et61x251_vidioc_s_ctrl(struct et61x251_device* cam, void __user * arg)
1671 {
1672 struct et61x251_sensor* s = &cam->sensor;
1673 struct v4l2_control ctrl;
1674 u8 i;
1675 int err = 0;
1676
1677 if (!s->set_ctrl)
1678 return -EINVAL;
1679
1680 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1681 return -EFAULT;
1682
1683 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1684 if (ctrl.id == s->qctrl[i].id) {
1685 if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
1686 return -EINVAL;
1687 if (ctrl.value < s->qctrl[i].minimum ||
1688 ctrl.value > s->qctrl[i].maximum)
1689 return -ERANGE;
1690 ctrl.value -= ctrl.value % s->qctrl[i].step;
1691 break;
1692 }
1693
1694 if ((err = s->set_ctrl(cam, &ctrl)))
1695 return err;
1696
1697 s->_qctrl[i].default_value = ctrl.value;
1698
1699 return 0;
1700 }
1701
1702
1703 static int
1704 et61x251_vidioc_cropcap(struct et61x251_device* cam, void __user * arg)
1705 {
1706 struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
1707
1708 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1709 cc->pixelaspect.numerator = 1;
1710 cc->pixelaspect.denominator = 1;
1711
1712 if (copy_to_user(arg, cc, sizeof(*cc)))
1713 return -EFAULT;
1714
1715 return 0;
1716 }
1717
1718
1719 static int
1720 et61x251_vidioc_g_crop(struct et61x251_device* cam, void __user * arg)
1721 {
1722 struct et61x251_sensor* s = &cam->sensor;
1723 struct v4l2_crop crop = {
1724 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1725 };
1726
1727 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1728
1729 if (copy_to_user(arg, &crop, sizeof(crop)))
1730 return -EFAULT;
1731
1732 return 0;
1733 }
1734
1735
1736 static int
1737 et61x251_vidioc_s_crop(struct et61x251_device* cam, void __user * arg)
1738 {
1739 struct et61x251_sensor* s = &cam->sensor;
1740 struct v4l2_crop crop;
1741 struct v4l2_rect* rect;
1742 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1743 struct v4l2_pix_format* pix_format = &(s->pix_format);
1744 u8 scale;
1745 const enum et61x251_stream_state stream = cam->stream;
1746 const u32 nbuffers = cam->nbuffers;
1747 u32 i;
1748 int err = 0;
1749
1750 if (copy_from_user(&crop, arg, sizeof(crop)))
1751 return -EFAULT;
1752
1753 rect = &(crop.c);
1754
1755 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1756 return -EINVAL;
1757
1758 if (cam->module_param.force_munmap)
1759 for (i = 0; i < cam->nbuffers; i++)
1760 if (cam->frame[i].vma_use_count) {
1761 DBG(3, "VIDIOC_S_CROP failed. "
1762 "Unmap the buffers first.");
1763 return -EINVAL;
1764 }
1765
1766 /* Preserve R,G or B origin */
1767 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
1768 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
1769
1770 if (rect->width < 4)
1771 rect->width = 4;
1772 if (rect->height < 4)
1773 rect->height = 4;
1774 if (rect->width > bounds->width)
1775 rect->width = bounds->width;
1776 if (rect->height > bounds->height)
1777 rect->height = bounds->height;
1778 if (rect->left < bounds->left)
1779 rect->left = bounds->left;
1780 if (rect->top < bounds->top)
1781 rect->top = bounds->top;
1782 if (rect->left + rect->width > bounds->left + bounds->width)
1783 rect->left = bounds->left+bounds->width - rect->width;
1784 if (rect->top + rect->height > bounds->top + bounds->height)
1785 rect->top = bounds->top+bounds->height - rect->height;
1786
1787 rect->width &= ~3L;
1788 rect->height &= ~3L;
1789
1790 if (ET61X251_PRESERVE_IMGSCALE) {
1791 /* Calculate the actual scaling factor */
1792 u32 a, b;
1793 a = rect->width * rect->height;
1794 b = pix_format->width * pix_format->height;
1795 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1796 } else
1797 scale = 1;
1798
1799 if (cam->stream == STREAM_ON)
1800 if ((err = et61x251_stream_interrupt(cam)))
1801 return err;
1802
1803 if (copy_to_user(arg, &crop, sizeof(crop))) {
1804 cam->stream = stream;
1805 return -EFAULT;
1806 }
1807
1808 if (cam->module_param.force_munmap || cam->io == IO_READ)
1809 et61x251_release_buffers(cam);
1810
1811 err = et61x251_set_crop(cam, rect);
1812 if (s->set_crop)
1813 err += s->set_crop(cam, rect);
1814 err += et61x251_set_scale(cam, scale);
1815
1816 if (err) { /* atomic, no rollback in ioctl() */
1817 cam->state |= DEV_MISCONFIGURED;
1818 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
1819 "use the camera, close and open /dev/video%d again.",
1820 cam->v4ldev->minor);
1821 return -EIO;
1822 }
1823
1824 s->pix_format.width = rect->width/scale;
1825 s->pix_format.height = rect->height/scale;
1826 memcpy(&(s->_rect), rect, sizeof(*rect));
1827
1828 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1829 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1830 cam->state |= DEV_MISCONFIGURED;
1831 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
1832 "use the camera, close and open /dev/video%d again.",
1833 cam->v4ldev->minor);
1834 return -ENOMEM;
1835 }
1836
1837 if (cam->io == IO_READ)
1838 et61x251_empty_framequeues(cam);
1839 else if (cam->module_param.force_munmap)
1840 et61x251_requeue_outqueue(cam);
1841
1842 cam->stream = stream;
1843
1844 return 0;
1845 }
1846
1847
1848 static int
1849 et61x251_vidioc_enum_fmt(struct et61x251_device* cam, void __user * arg)
1850 {
1851 struct v4l2_fmtdesc fmtd;
1852
1853 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
1854 return -EFAULT;
1855
1856 if (fmtd.index == 0) {
1857 strcpy(fmtd.description, "bayer rgb");
1858 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
1859 } else if (fmtd.index == 1) {
1860 strcpy(fmtd.description, "compressed");
1861 fmtd.pixelformat = V4L2_PIX_FMT_ET61X251;
1862 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
1863 } else
1864 return -EINVAL;
1865
1866 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1867 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1868
1869 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
1870 return -EFAULT;
1871
1872 return 0;
1873 }
1874
1875
1876 static int
1877 et61x251_vidioc_g_fmt(struct et61x251_device* cam, void __user * arg)
1878 {
1879 struct v4l2_format format;
1880 struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
1881
1882 if (copy_from_user(&format, arg, sizeof(format)))
1883 return -EFAULT;
1884
1885 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1886 return -EINVAL;
1887
1888 pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_ET61X251)
1889 ? 0 : (pfmt->width * pfmt->priv) / 8;
1890 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
1891 pfmt->field = V4L2_FIELD_NONE;
1892 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1893
1894 if (copy_to_user(arg, &format, sizeof(format)))
1895 return -EFAULT;
1896
1897 return 0;
1898 }
1899
1900
1901 static int
1902 et61x251_vidioc_try_s_fmt(struct et61x251_device* cam, unsigned int cmd,
1903 void __user * arg)
1904 {
1905 struct et61x251_sensor* s = &cam->sensor;
1906 struct v4l2_format format;
1907 struct v4l2_pix_format* pix;
1908 struct v4l2_pix_format* pfmt = &(s->pix_format);
1909 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1910 struct v4l2_rect rect;
1911 u8 scale;
1912 const enum et61x251_stream_state stream = cam->stream;
1913 const u32 nbuffers = cam->nbuffers;
1914 u32 i;
1915 int err = 0;
1916
1917 if (copy_from_user(&format, arg, sizeof(format)))
1918 return -EFAULT;
1919
1920 pix = &(format.fmt.pix);
1921
1922 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1923 return -EINVAL;
1924
1925 memcpy(&rect, &(s->_rect), sizeof(rect));
1926
1927 { /* calculate the actual scaling factor */
1928 u32 a, b;
1929 a = rect.width * rect.height;
1930 b = pix->width * pix->height;
1931 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1932 }
1933
1934 rect.width = scale * pix->width;
1935 rect.height = scale * pix->height;
1936
1937 if (rect.width < 4)
1938 rect.width = 4;
1939 if (rect.height < 4)
1940 rect.height = 4;
1941 if (rect.width > bounds->left + bounds->width - rect.left)
1942 rect.width = bounds->left + bounds->width - rect.left;
1943 if (rect.height > bounds->top + bounds->height - rect.top)
1944 rect.height = bounds->top + bounds->height - rect.top;
1945
1946 rect.width &= ~3L;
1947 rect.height &= ~3L;
1948
1949 { /* adjust the scaling factor */
1950 u32 a, b;
1951 a = rect.width * rect.height;
1952 b = pix->width * pix->height;
1953 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1954 }
1955
1956 pix->width = rect.width / scale;
1957 pix->height = rect.height / scale;
1958
1959 if (pix->pixelformat != V4L2_PIX_FMT_ET61X251 &&
1960 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
1961 pix->pixelformat = pfmt->pixelformat;
1962 pix->priv = pfmt->priv; /* bpp */
1963 pix->colorspace = pfmt->colorspace;
1964 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1965 ? 0 : (pix->width * pix->priv) / 8;
1966 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
1967 pix->field = V4L2_FIELD_NONE;
1968
1969 if (cmd == VIDIOC_TRY_FMT) {
1970 if (copy_to_user(arg, &format, sizeof(format)))
1971 return -EFAULT;
1972 return 0;
1973 }
1974
1975 if (cam->module_param.force_munmap)
1976 for (i = 0; i < cam->nbuffers; i++)
1977 if (cam->frame[i].vma_use_count) {
1978 DBG(3, "VIDIOC_S_FMT failed. "
1979 "Unmap the buffers first.");
1980 return -EINVAL;
1981 }
1982
1983 if (cam->stream == STREAM_ON)
1984 if ((err = et61x251_stream_interrupt(cam)))
1985 return err;
1986
1987 if (copy_to_user(arg, &format, sizeof(format))) {
1988 cam->stream = stream;
1989 return -EFAULT;
1990 }
1991
1992 if (cam->module_param.force_munmap || cam->io == IO_READ)
1993 et61x251_release_buffers(cam);
1994
1995 err += et61x251_set_pix_format(cam, pix);
1996 err += et61x251_set_crop(cam, &rect);
1997 if (s->set_pix_format)
1998 err += s->set_pix_format(cam, pix);
1999 if (s->set_crop)
2000 err += s->set_crop(cam, &rect);
2001 err += et61x251_set_scale(cam, scale);
2002
2003 if (err) { /* atomic, no rollback in ioctl() */
2004 cam->state |= DEV_MISCONFIGURED;
2005 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
2006 "use the camera, close and open /dev/video%d again.",
2007 cam->v4ldev->minor);
2008 return -EIO;
2009 }
2010
2011 memcpy(pfmt, pix, sizeof(*pix));
2012 memcpy(&(s->_rect), &rect, sizeof(rect));
2013
2014 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2015 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
2016 cam->state |= DEV_MISCONFIGURED;
2017 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2018 "use the camera, close and open /dev/video%d again.",
2019 cam->v4ldev->minor);
2020 return -ENOMEM;
2021 }
2022
2023 if (cam->io == IO_READ)
2024 et61x251_empty_framequeues(cam);
2025 else if (cam->module_param.force_munmap)
2026 et61x251_requeue_outqueue(cam);
2027
2028 cam->stream = stream;
2029
2030 return 0;
2031 }
2032
2033
2034 static int
2035 et61x251_vidioc_g_jpegcomp(struct et61x251_device* cam, void __user * arg)
2036 {
2037 if (copy_to_user(arg, &cam->compression,
2038 sizeof(cam->compression)))
2039 return -EFAULT;
2040
2041 return 0;
2042 }
2043
2044
2045 static int
2046 et61x251_vidioc_s_jpegcomp(struct et61x251_device* cam, void __user * arg)
2047 {
2048 struct v4l2_jpegcompression jc;
2049 const enum et61x251_stream_state stream = cam->stream;
2050 int err = 0;
2051
2052 if (copy_from_user(&jc, arg, sizeof(jc)))
2053 return -EFAULT;
2054
2055 if (jc.quality != 0 && jc.quality != 1)
2056 return -EINVAL;
2057
2058 if (cam->stream == STREAM_ON)
2059 if ((err = et61x251_stream_interrupt(cam)))
2060 return err;
2061
2062 err += et61x251_set_compression(cam, &jc);
2063 if (err) { /* atomic, no rollback in ioctl() */
2064 cam->state |= DEV_MISCONFIGURED;
2065 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2066 "problems. To use the camera, close and open "
2067 "/dev/video%d again.", cam->v4ldev->minor);
2068 return -EIO;
2069 }
2070
2071 cam->compression.quality = jc.quality;
2072
2073 cam->stream = stream;
2074
2075 return 0;
2076 }
2077
2078
2079 static int
2080 et61x251_vidioc_reqbufs(struct et61x251_device* cam, void __user * arg)
2081 {
2082 struct v4l2_requestbuffers rb;
2083 u32 i;
2084 int err;
2085
2086 if (copy_from_user(&rb, arg, sizeof(rb)))
2087 return -EFAULT;
2088
2089 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2090 rb.memory != V4L2_MEMORY_MMAP)
2091 return -EINVAL;
2092
2093 if (cam->io == IO_READ) {
2094 DBG(3, "Close and open the device again to choose the mmap "
2095 "I/O method");
2096 return -EINVAL;
2097 }
2098
2099 for (i = 0; i < cam->nbuffers; i++)
2100 if (cam->frame[i].vma_use_count) {
2101 DBG(3, "VIDIOC_REQBUFS failed. "
2102 "Previous buffers are still mapped.");
2103 return -EINVAL;
2104 }
2105
2106 if (cam->stream == STREAM_ON)
2107 if ((err = et61x251_stream_interrupt(cam)))
2108 return err;
2109
2110 et61x251_empty_framequeues(cam);
2111
2112 et61x251_release_buffers(cam);
2113 if (rb.count)
2114 rb.count = et61x251_request_buffers(cam, rb.count, IO_MMAP);
2115
2116 if (copy_to_user(arg, &rb, sizeof(rb))) {
2117 et61x251_release_buffers(cam);
2118 cam->io = IO_NONE;
2119 return -EFAULT;
2120 }
2121
2122 cam->io = rb.count ? IO_MMAP : IO_NONE;
2123
2124 return 0;
2125 }
2126
2127
2128 static int
2129 et61x251_vidioc_querybuf(struct et61x251_device* cam, void __user * arg)
2130 {
2131 struct v4l2_buffer b;
2132
2133 if (copy_from_user(&b, arg, sizeof(b)))
2134 return -EFAULT;
2135
2136 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2137 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2138 return -EINVAL;
2139
2140 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2141
2142 if (cam->frame[b.index].vma_use_count)
2143 b.flags |= V4L2_BUF_FLAG_MAPPED;
2144
2145 if (cam->frame[b.index].state == F_DONE)
2146 b.flags |= V4L2_BUF_FLAG_DONE;
2147 else if (cam->frame[b.index].state != F_UNUSED)
2148 b.flags |= V4L2_BUF_FLAG_QUEUED;
2149
2150 if (copy_to_user(arg, &b, sizeof(b)))
2151 return -EFAULT;
2152
2153 return 0;
2154 }
2155
2156
2157 static int
2158 et61x251_vidioc_qbuf(struct et61x251_device* cam, void __user * arg)
2159 {
2160 struct v4l2_buffer b;
2161 unsigned long lock_flags;
2162
2163 if (copy_from_user(&b, arg, sizeof(b)))
2164 return -EFAULT;
2165
2166 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2167 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2168 return -EINVAL;
2169
2170 if (cam->frame[b.index].state != F_UNUSED)
2171 return -EINVAL;
2172
2173 cam->frame[b.index].state = F_QUEUED;
2174
2175 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2176 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2177 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2178
2179 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2180
2181 return 0;
2182 }
2183
2184
2185 static int
2186 et61x251_vidioc_dqbuf(struct et61x251_device* cam, struct file* filp,
2187 void __user * arg)
2188 {
2189 struct v4l2_buffer b;
2190 struct et61x251_frame_t *f;
2191 unsigned long lock_flags;
2192 long timeout;
2193
2194 if (copy_from_user(&b, arg, sizeof(b)))
2195 return -EFAULT;
2196
2197 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
2198 return -EINVAL;
2199
2200 if (list_empty(&cam->outqueue)) {
2201 if (cam->stream == STREAM_OFF)
2202 return -EINVAL;
2203 if (filp->f_flags & O_NONBLOCK)
2204 return -EAGAIN;
2205 timeout = wait_event_interruptible_timeout
2206 ( cam->wait_frame,
2207 (!list_empty(&cam->outqueue)) ||
2208 (cam->state & DEV_DISCONNECTED) ||
2209 (cam->state & DEV_MISCONFIGURED),
2210 cam->module_param.frame_timeout *
2211 1000 * msecs_to_jiffies(1) );
2212 if (timeout < 0)
2213 return timeout;
2214 if (cam->state & DEV_DISCONNECTED)
2215 return -ENODEV;
2216 if (!timeout || (cam->state & DEV_MISCONFIGURED))
2217 return -EIO;
2218 }
2219
2220 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2221 f = list_entry(cam->outqueue.next, struct et61x251_frame_t, frame);
2222 list_del(cam->outqueue.next);
2223 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2224
2225 f->state = F_UNUSED;
2226
2227 memcpy(&b, &f->buf, sizeof(b));
2228 if (f->vma_use_count)
2229 b.flags |= V4L2_BUF_FLAG_MAPPED;
2230
2231 if (copy_to_user(arg, &b, sizeof(b)))
2232 return -EFAULT;
2233
2234 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2235
2236 return 0;
2237 }
2238
2239
2240 static int
2241 et61x251_vidioc_streamon(struct et61x251_device* cam, void __user * arg)
2242 {
2243 int type;
2244
2245 if (copy_from_user(&type, arg, sizeof(type)))
2246 return -EFAULT;
2247
2248 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2249 return -EINVAL;
2250
2251 if (list_empty(&cam->inqueue))
2252 return -EINVAL;
2253
2254 cam->stream = STREAM_ON;
2255
2256 DBG(3, "Stream on");
2257
2258 return 0;
2259 }
2260
2261
2262 static int
2263 et61x251_vidioc_streamoff(struct et61x251_device* cam, void __user * arg)
2264 {
2265 int type, err;
2266
2267 if (copy_from_user(&type, arg, sizeof(type)))
2268 return -EFAULT;
2269
2270 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2271 return -EINVAL;
2272
2273 if (cam->stream == STREAM_ON)
2274 if ((err = et61x251_stream_interrupt(cam)))
2275 return err;
2276
2277 et61x251_empty_framequeues(cam);
2278
2279 DBG(3, "Stream off");
2280
2281 return 0;
2282 }
2283
2284
2285 static int
2286 et61x251_vidioc_g_parm(struct et61x251_device* cam, void __user * arg)
2287 {
2288 struct v4l2_streamparm sp;
2289
2290 if (copy_from_user(&sp, arg, sizeof(sp)))
2291 return -EFAULT;
2292
2293 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2294 return -EINVAL;
2295
2296 sp.parm.capture.extendedmode = 0;
2297 sp.parm.capture.readbuffers = cam->nreadbuffers;
2298
2299 if (copy_to_user(arg, &sp, sizeof(sp)))
2300 return -EFAULT;
2301
2302 return 0;
2303 }
2304
2305
2306 static int
2307 et61x251_vidioc_s_parm(struct et61x251_device* cam, void __user * arg)
2308 {
2309 struct v4l2_streamparm sp;
2310
2311 if (copy_from_user(&sp, arg, sizeof(sp)))
2312 return -EFAULT;
2313
2314 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2315 return -EINVAL;
2316
2317 sp.parm.capture.extendedmode = 0;
2318
2319 if (sp.parm.capture.readbuffers == 0)
2320 sp.parm.capture.readbuffers = cam->nreadbuffers;
2321
2322 if (sp.parm.capture.readbuffers > ET61X251_MAX_FRAMES)
2323 sp.parm.capture.readbuffers = ET61X251_MAX_FRAMES;
2324
2325 if (copy_to_user(arg, &sp, sizeof(sp)))
2326 return -EFAULT;
2327
2328 cam->nreadbuffers = sp.parm.capture.readbuffers;
2329
2330 return 0;
2331 }
2332
2333
2334 static int et61x251_ioctl_v4l2(struct inode* inode, struct file* filp,
2335 unsigned int cmd, void __user * arg)
2336 {
2337 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
2338
2339 switch (cmd) {
2340
2341 case VIDIOC_QUERYCAP:
2342 return et61x251_vidioc_querycap(cam, arg);
2343
2344 case VIDIOC_ENUMINPUT:
2345 return et61x251_vidioc_enuminput(cam, arg);
2346
2347 case VIDIOC_G_INPUT:
2348 return et61x251_vidioc_g_input(cam, arg);
2349
2350 case VIDIOC_S_INPUT:
2351 return et61x251_vidioc_s_input(cam, arg);
2352
2353 case VIDIOC_QUERYCTRL:
2354 return et61x251_vidioc_query_ctrl(cam, arg);
2355
2356 case VIDIOC_G_CTRL:
2357 return et61x251_vidioc_g_ctrl(cam, arg);
2358
2359 case VIDIOC_S_CTRL:
2360 return et61x251_vidioc_s_ctrl(cam, arg);
2361
2362 case VIDIOC_CROPCAP:
2363 return et61x251_vidioc_cropcap(cam, arg);
2364
2365 case VIDIOC_G_CROP:
2366 return et61x251_vidioc_g_crop(cam, arg);
2367
2368 case VIDIOC_S_CROP:
2369 return et61x251_vidioc_s_crop(cam, arg);
2370
2371 case VIDIOC_ENUM_FMT:
2372 return et61x251_vidioc_enum_fmt(cam, arg);
2373
2374 case VIDIOC_G_FMT:
2375 return et61x251_vidioc_g_fmt(cam, arg);
2376
2377 case VIDIOC_TRY_FMT:
2378 case VIDIOC_S_FMT:
2379 return et61x251_vidioc_try_s_fmt(cam, cmd, arg);
2380
2381 case VIDIOC_G_JPEGCOMP:
2382 return et61x251_vidioc_g_jpegcomp(cam, arg);
2383
2384 case VIDIOC_S_JPEGCOMP:
2385 return et61x251_vidioc_s_jpegcomp(cam, arg);
2386
2387 case VIDIOC_REQBUFS:
2388 return et61x251_vidioc_reqbufs(cam, arg);
2389
2390 case VIDIOC_QUERYBUF:
2391 return et61x251_vidioc_querybuf(cam, arg);
2392
2393 case VIDIOC_QBUF:
2394 return et61x251_vidioc_qbuf(cam, arg);
2395
2396 case VIDIOC_DQBUF:
2397 return et61x251_vidioc_dqbuf(cam, filp, arg);
2398
2399 case VIDIOC_STREAMON:
2400 return et61x251_vidioc_streamon(cam, arg);
2401
2402 case VIDIOC_STREAMOFF:
2403 return et61x251_vidioc_streamoff(cam, arg);
2404
2405 case VIDIOC_G_PARM:
2406 return et61x251_vidioc_g_parm(cam, arg);
2407
2408 case VIDIOC_S_PARM:
2409 return et61x251_vidioc_s_parm(cam, arg);
2410
2411 case VIDIOC_G_STD:
2412 case VIDIOC_S_STD:
2413 case VIDIOC_QUERYSTD:
2414 case VIDIOC_ENUMSTD:
2415 case VIDIOC_QUERYMENU:
2416 return -EINVAL;
2417
2418 default:
2419 return -EINVAL;
2420
2421 }
2422 }
2423
2424
2425 static int et61x251_ioctl(struct inode* inode, struct file* filp,
2426 unsigned int cmd, unsigned long arg)
2427 {
2428 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
2429 int err = 0;
2430
2431 if (mutex_lock_interruptible(&cam->fileop_mutex))
2432 return -ERESTARTSYS;
2433
2434 if (cam->state & DEV_DISCONNECTED) {
2435 DBG(1, "Device not present");
2436 mutex_unlock(&cam->fileop_mutex);
2437 return -ENODEV;
2438 }
2439
2440 if (cam->state & DEV_MISCONFIGURED) {
2441 DBG(1, "The camera is misconfigured. Close and open it "
2442 "again.");
2443 mutex_unlock(&cam->fileop_mutex);
2444 return -EIO;
2445 }
2446
2447 V4LDBG(3, "et61x251", cmd);
2448
2449 err = et61x251_ioctl_v4l2(inode, filp, cmd, (void __user *)arg);
2450
2451 mutex_unlock(&cam->fileop_mutex);
2452
2453 return err;
2454 }
2455
2456
2457 static const struct file_operations et61x251_fops = {
2458 .owner = THIS_MODULE,
2459 .open = et61x251_open,
2460 .release = et61x251_release,
2461 .ioctl = et61x251_ioctl,
2462 .read = et61x251_read,
2463 .poll = et61x251_poll,
2464 .mmap = et61x251_mmap,
2465 .llseek = no_llseek,
2466 };
2467
2468 /*****************************************************************************/
2469
2470 /* It exists a single interface only. We do not need to validate anything. */
2471 static int
2472 et61x251_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
2473 {
2474 struct usb_device *udev = interface_to_usbdev(intf);
2475 struct et61x251_device* cam;
2476 static unsigned int dev_nr = 0;
2477 unsigned int i;
2478 int err = 0;
2479
2480 if (!(cam = kzalloc(sizeof(struct et61x251_device), GFP_KERNEL)))
2481 return -ENOMEM;
2482
2483 cam->usbdev = udev;
2484
2485 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
2486 DBG(1, "kmalloc() failed");
2487 err = -ENOMEM;
2488 goto fail;
2489 }
2490
2491 if (!(cam->v4ldev = video_device_alloc())) {
2492 DBG(1, "video_device_alloc() failed");
2493 err = -ENOMEM;
2494 goto fail;
2495 }
2496
2497 mutex_init(&cam->dev_mutex);
2498
2499 DBG(2, "ET61X[12]51 PC Camera Controller detected "
2500 "(vid/pid 0x%04X/0x%04X)",id->idVendor, id->idProduct);
2501
2502 for (i = 0; et61x251_sensor_table[i]; i++) {
2503 err = et61x251_sensor_table[i](cam);
2504 if (!err)
2505 break;
2506 }
2507
2508 if (!err)
2509 DBG(2, "%s image sensor detected", cam->sensor.name);
2510 else {
2511 DBG(1, "No supported image sensor detected");
2512 err = -ENODEV;
2513 goto fail;
2514 }
2515
2516 if (et61x251_init(cam)) {
2517 DBG(1, "Initialization failed. I will retry on open().");
2518 cam->state |= DEV_MISCONFIGURED;
2519 }
2520
2521 strcpy(cam->v4ldev->name, "ET61X[12]51 PC Camera");
2522 cam->v4ldev->owner = THIS_MODULE;
2523 cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
2524 cam->v4ldev->hardware = 0;
2525 cam->v4ldev->fops = &et61x251_fops;
2526 cam->v4ldev->minor = video_nr[dev_nr];
2527 cam->v4ldev->release = video_device_release;
2528 video_set_drvdata(cam->v4ldev, cam);
2529
2530 mutex_lock(&cam->dev_mutex);
2531
2532 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
2533 video_nr[dev_nr]);
2534 if (err) {
2535 DBG(1, "V4L2 device registration failed");
2536 if (err == -ENFILE && video_nr[dev_nr] == -1)
2537 DBG(1, "Free /dev/videoX node not found");
2538 video_nr[dev_nr] = -1;
2539 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2540 mutex_unlock(&cam->dev_mutex);
2541 goto fail;
2542 }
2543
2544 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor);
2545
2546 cam->module_param.force_munmap = force_munmap[dev_nr];
2547 cam->module_param.frame_timeout = frame_timeout[dev_nr];
2548
2549 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2550
2551 #ifdef CONFIG_VIDEO_ADV_DEBUG
2552 err = et61x251_create_sysfs(cam);
2553 if (err)
2554 goto fail2;
2555 DBG(2, "Optional device control through 'sysfs' interface ready");
2556 #endif
2557
2558 usb_set_intfdata(intf, cam);
2559
2560 mutex_unlock(&cam->dev_mutex);
2561
2562 return 0;
2563
2564 #ifdef CONFIG_VIDEO_ADV_DEBUG
2565 fail2:
2566 video_nr[dev_nr] = -1;
2567 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2568 mutex_unlock(&cam->dev_mutex);
2569 video_unregister_device(cam->v4ldev);
2570 #endif
2571 fail:
2572 if (cam) {
2573 kfree(cam->control_buffer);
2574 if (cam->v4ldev)
2575 video_device_release(cam->v4ldev);
2576 kfree(cam);
2577 }
2578 return err;
2579 }
2580
2581
2582 static void et61x251_usb_disconnect(struct usb_interface* intf)
2583 {
2584 struct et61x251_device* cam = usb_get_intfdata(intf);
2585
2586 if (!cam)
2587 return;
2588
2589 down_write(&et61x251_disconnect);
2590
2591 mutex_lock(&cam->dev_mutex);
2592
2593 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
2594
2595 wake_up_interruptible_all(&cam->open);
2596
2597 if (cam->users) {
2598 DBG(2, "Device /dev/video%d is open! Deregistration and "
2599 "memory deallocation are deferred on close.",
2600 cam->v4ldev->minor);
2601 cam->state |= DEV_MISCONFIGURED;
2602 et61x251_stop_transfer(cam);
2603 cam->state |= DEV_DISCONNECTED;
2604 wake_up_interruptible(&cam->wait_frame);
2605 wake_up(&cam->wait_stream);
2606 usb_get_dev(cam->usbdev);
2607 } else {
2608 cam->state |= DEV_DISCONNECTED;
2609 et61x251_release_resources(cam);
2610 }
2611
2612 mutex_unlock(&cam->dev_mutex);
2613
2614 if (!cam->users)
2615 kfree(cam);
2616
2617 up_write(&et61x251_disconnect);
2618 }
2619
2620
2621 static struct usb_driver et61x251_usb_driver = {
2622 .name = "et61x251",
2623 .id_table = et61x251_id_table,
2624 .probe = et61x251_usb_probe,
2625 .disconnect = et61x251_usb_disconnect,
2626 };
2627
2628 /*****************************************************************************/
2629
2630 static int __init et61x251_module_init(void)
2631 {
2632 int err = 0;
2633
2634 KDBG(2, ET61X251_MODULE_NAME " v" ET61X251_MODULE_VERSION);
2635 KDBG(3, ET61X251_MODULE_AUTHOR);
2636
2637 if ((err = usb_register(&et61x251_usb_driver)))
2638 KDBG(1, "usb_register() failed");
2639
2640 return err;
2641 }
2642
2643
2644 static void __exit et61x251_module_exit(void)
2645 {
2646 usb_deregister(&et61x251_usb_driver);
2647 }
2648
2649
2650 module_init(et61x251_module_init);
2651 module_exit(et61x251_module_exit);
SocketAccessConTroL development