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OMAP3: PM: decouple PER and CORE context save and restore
[linux-ginger.git] / drivers / media / video / et61x251 / et61x251_core.c
blob88987a57cf7b655e820517a32fd35f67fe83c1d1
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 msecs_to_jiffies(
1383 cam->module_param.frame_timeout * 1000
1384 )
1385 );
1386 if (timeout < 0) {
1387 mutex_unlock(&cam->fileop_mutex);
1388 return timeout;
1389 }
1390 if (cam->state & DEV_DISCONNECTED) {
1391 mutex_unlock(&cam->fileop_mutex);
1392 return -ENODEV;
1393 }
1394 if (!timeout || (cam->state & DEV_MISCONFIGURED)) {
1395 mutex_unlock(&cam->fileop_mutex);
1396 return -EIO;
1397 }
1398 }
1399
1400 f = list_entry(cam->outqueue.prev, struct et61x251_frame_t, frame);
1401
1402 if (count > f->buf.bytesused)
1403 count = f->buf.bytesused;
1404
1405 if (copy_to_user(buf, f->bufmem, count)) {
1406 err = -EFAULT;
1407 goto exit;
1408 }
1409 *f_pos += count;
1410
1411 exit:
1412 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1413 list_for_each_entry(i, &cam->outqueue, frame)
1414 i->state = F_UNUSED;
1415 INIT_LIST_HEAD(&cam->outqueue);
1416 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1417
1418 et61x251_queue_unusedframes(cam);
1419
1420 PDBGG("Frame #%lu, bytes read: %zu",
1421 (unsigned long)f->buf.index, count);
1422
1423 mutex_unlock(&cam->fileop_mutex);
1424
1425 return err ? err : count;
1426 }
1427
1428
1429 static unsigned int et61x251_poll(struct file *filp, poll_table *wait)
1430 {
1431 struct et61x251_device *cam = video_drvdata(filp);
1432 struct et61x251_frame_t* f;
1433 unsigned long lock_flags;
1434 unsigned int mask = 0;
1435
1436 if (mutex_lock_interruptible(&cam->fileop_mutex))
1437 return POLLERR;
1438
1439 if (cam->state & DEV_DISCONNECTED) {
1440 DBG(1, "Device not present");
1441 goto error;
1442 }
1443
1444 if (cam->state & DEV_MISCONFIGURED) {
1445 DBG(1, "The camera is misconfigured. Close and open it "
1446 "again.");
1447 goto error;
1448 }
1449
1450 if (cam->io == IO_NONE) {
1451 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1452 IO_READ)) {
1453 DBG(1, "poll() failed, not enough memory");
1454 goto error;
1455 }
1456 cam->io = IO_READ;
1457 cam->stream = STREAM_ON;
1458 }
1459
1460 if (cam->io == IO_READ) {
1461 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1462 list_for_each_entry(f, &cam->outqueue, frame)
1463 f->state = F_UNUSED;
1464 INIT_LIST_HEAD(&cam->outqueue);
1465 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1466 et61x251_queue_unusedframes(cam);
1467 }
1468
1469 poll_wait(filp, &cam->wait_frame, wait);
1470
1471 if (!list_empty(&cam->outqueue))
1472 mask |= POLLIN | POLLRDNORM;
1473
1474 mutex_unlock(&cam->fileop_mutex);
1475
1476 return mask;
1477
1478 error:
1479 mutex_unlock(&cam->fileop_mutex);
1480 return POLLERR;
1481 }
1482
1483
1484 static void et61x251_vm_open(struct vm_area_struct* vma)
1485 {
1486 struct et61x251_frame_t* f = vma->vm_private_data;
1487 f->vma_use_count++;
1488 }
1489
1490
1491 static void et61x251_vm_close(struct vm_area_struct* vma)
1492 {
1493 /* NOTE: buffers are not freed here */
1494 struct et61x251_frame_t* f = vma->vm_private_data;
1495 f->vma_use_count--;
1496 }
1497
1498
1499 static const struct vm_operations_struct et61x251_vm_ops = {
1500 .open = et61x251_vm_open,
1501 .close = et61x251_vm_close,
1502 };
1503
1504
1505 static int et61x251_mmap(struct file* filp, struct vm_area_struct *vma)
1506 {
1507 struct et61x251_device *cam = video_drvdata(filp);
1508 unsigned long size = vma->vm_end - vma->vm_start,
1509 start = vma->vm_start;
1510 void *pos;
1511 u32 i;
1512
1513 if (mutex_lock_interruptible(&cam->fileop_mutex))
1514 return -ERESTARTSYS;
1515
1516 if (cam->state & DEV_DISCONNECTED) {
1517 DBG(1, "Device not present");
1518 mutex_unlock(&cam->fileop_mutex);
1519 return -ENODEV;
1520 }
1521
1522 if (cam->state & DEV_MISCONFIGURED) {
1523 DBG(1, "The camera is misconfigured. Close and open it "
1524 "again.");
1525 mutex_unlock(&cam->fileop_mutex);
1526 return -EIO;
1527 }
1528
1529 if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
1530 mutex_unlock(&cam->fileop_mutex);
1531 return -EACCES;
1532 }
1533
1534 if (cam->io != IO_MMAP ||
1535 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
1536 mutex_unlock(&cam->fileop_mutex);
1537 return -EINVAL;
1538 }
1539
1540 for (i = 0; i < cam->nbuffers; i++) {
1541 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
1542 break;
1543 }
1544 if (i == cam->nbuffers) {
1545 mutex_unlock(&cam->fileop_mutex);
1546 return -EINVAL;
1547 }
1548
1549 vma->vm_flags |= VM_IO;
1550 vma->vm_flags |= VM_RESERVED;
1551
1552 pos = cam->frame[i].bufmem;
1553 while (size > 0) { /* size is page-aligned */
1554 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1555 mutex_unlock(&cam->fileop_mutex);
1556 return -EAGAIN;
1557 }
1558 start += PAGE_SIZE;
1559 pos += PAGE_SIZE;
1560 size -= PAGE_SIZE;
1561 }
1562
1563 vma->vm_ops = &et61x251_vm_ops;
1564 vma->vm_private_data = &cam->frame[i];
1565 et61x251_vm_open(vma);
1566
1567 mutex_unlock(&cam->fileop_mutex);
1568
1569 return 0;
1570 }
1571
1572 /*****************************************************************************/
1573
1574 static int
1575 et61x251_vidioc_querycap(struct et61x251_device* cam, void __user * arg)
1576 {
1577 struct v4l2_capability cap = {
1578 .driver = "et61x251",
1579 .version = ET61X251_MODULE_VERSION_CODE,
1580 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1581 V4L2_CAP_STREAMING,
1582 };
1583
1584 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
1585 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
1586 strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
1587 sizeof(cap.bus_info));
1588
1589 if (copy_to_user(arg, &cap, sizeof(cap)))
1590 return -EFAULT;
1591
1592 return 0;
1593 }
1594
1595
1596 static int
1597 et61x251_vidioc_enuminput(struct et61x251_device* cam, void __user * arg)
1598 {
1599 struct v4l2_input i;
1600
1601 if (copy_from_user(&i, arg, sizeof(i)))
1602 return -EFAULT;
1603
1604 if (i.index)
1605 return -EINVAL;
1606
1607 memset(&i, 0, sizeof(i));
1608 strcpy(i.name, "Camera");
1609 i.type = V4L2_INPUT_TYPE_CAMERA;
1610
1611 if (copy_to_user(arg, &i, sizeof(i)))
1612 return -EFAULT;
1613
1614 return 0;
1615 }
1616
1617
1618 static int
1619 et61x251_vidioc_g_input(struct et61x251_device* cam, void __user * arg)
1620 {
1621 int index = 0;
1622
1623 if (copy_to_user(arg, &index, sizeof(index)))
1624 return -EFAULT;
1625
1626 return 0;
1627 }
1628
1629
1630 static int
1631 et61x251_vidioc_s_input(struct et61x251_device* cam, void __user * arg)
1632 {
1633 int index;
1634
1635 if (copy_from_user(&index, arg, sizeof(index)))
1636 return -EFAULT;
1637
1638 if (index != 0)
1639 return -EINVAL;
1640
1641 return 0;
1642 }
1643
1644
1645 static int
1646 et61x251_vidioc_query_ctrl(struct et61x251_device* cam, void __user * arg)
1647 {
1648 struct et61x251_sensor* s = &cam->sensor;
1649 struct v4l2_queryctrl qc;
1650 u8 i;
1651
1652 if (copy_from_user(&qc, arg, sizeof(qc)))
1653 return -EFAULT;
1654
1655 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1656 if (qc.id && qc.id == s->qctrl[i].id) {
1657 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1658 if (copy_to_user(arg, &qc, sizeof(qc)))
1659 return -EFAULT;
1660 return 0;
1661 }
1662
1663 return -EINVAL;
1664 }
1665
1666
1667 static int
1668 et61x251_vidioc_g_ctrl(struct et61x251_device* cam, void __user * arg)
1669 {
1670 struct et61x251_sensor* s = &cam->sensor;
1671 struct v4l2_control ctrl;
1672 int err = 0;
1673 u8 i;
1674
1675 if (!s->get_ctrl && !s->set_ctrl)
1676 return -EINVAL;
1677
1678 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1679 return -EFAULT;
1680
1681 if (!s->get_ctrl) {
1682 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1683 if (ctrl.id == s->qctrl[i].id) {
1684 ctrl.value = s->_qctrl[i].default_value;
1685 goto exit;
1686 }
1687 return -EINVAL;
1688 } else
1689 err = s->get_ctrl(cam, &ctrl);
1690
1691 exit:
1692 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1693 return -EFAULT;
1694
1695 return err;
1696 }
1697
1698
1699 static int
1700 et61x251_vidioc_s_ctrl(struct et61x251_device* cam, void __user * arg)
1701 {
1702 struct et61x251_sensor* s = &cam->sensor;
1703 struct v4l2_control ctrl;
1704 u8 i;
1705 int err = 0;
1706
1707 if (!s->set_ctrl)
1708 return -EINVAL;
1709
1710 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1711 return -EFAULT;
1712
1713 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1714 if (ctrl.id == s->qctrl[i].id) {
1715 if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
1716 return -EINVAL;
1717 if (ctrl.value < s->qctrl[i].minimum ||
1718 ctrl.value > s->qctrl[i].maximum)
1719 return -ERANGE;
1720 ctrl.value -= ctrl.value % s->qctrl[i].step;
1721 break;
1722 }
1723
1724 if ((err = s->set_ctrl(cam, &ctrl)))
1725 return err;
1726
1727 s->_qctrl[i].default_value = ctrl.value;
1728
1729 return 0;
1730 }
1731
1732
1733 static int
1734 et61x251_vidioc_cropcap(struct et61x251_device* cam, void __user * arg)
1735 {
1736 struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
1737
1738 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1739 cc->pixelaspect.numerator = 1;
1740 cc->pixelaspect.denominator = 1;
1741
1742 if (copy_to_user(arg, cc, sizeof(*cc)))
1743 return -EFAULT;
1744
1745 return 0;
1746 }
1747
1748
1749 static int
1750 et61x251_vidioc_g_crop(struct et61x251_device* cam, void __user * arg)
1751 {
1752 struct et61x251_sensor* s = &cam->sensor;
1753 struct v4l2_crop crop = {
1754 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1755 };
1756
1757 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1758
1759 if (copy_to_user(arg, &crop, sizeof(crop)))
1760 return -EFAULT;
1761
1762 return 0;
1763 }
1764
1765
1766 static int
1767 et61x251_vidioc_s_crop(struct et61x251_device* cam, void __user * arg)
1768 {
1769 struct et61x251_sensor* s = &cam->sensor;
1770 struct v4l2_crop crop;
1771 struct v4l2_rect* rect;
1772 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1773 struct v4l2_pix_format* pix_format = &(s->pix_format);
1774 u8 scale;
1775 const enum et61x251_stream_state stream = cam->stream;
1776 const u32 nbuffers = cam->nbuffers;
1777 u32 i;
1778 int err = 0;
1779
1780 if (copy_from_user(&crop, arg, sizeof(crop)))
1781 return -EFAULT;
1782
1783 rect = &(crop.c);
1784
1785 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1786 return -EINVAL;
1787
1788 if (cam->module_param.force_munmap)
1789 for (i = 0; i < cam->nbuffers; i++)
1790 if (cam->frame[i].vma_use_count) {
1791 DBG(3, "VIDIOC_S_CROP failed. "
1792 "Unmap the buffers first.");
1793 return -EBUSY;
1794 }
1795
1796 /* Preserve R,G or B origin */
1797 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
1798 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
1799
1800 if (rect->width < 16)
1801 rect->width = 16;
1802 if (rect->height < 16)
1803 rect->height = 16;
1804 if (rect->width > bounds->width)
1805 rect->width = bounds->width;
1806 if (rect->height > bounds->height)
1807 rect->height = bounds->height;
1808 if (rect->left < bounds->left)
1809 rect->left = bounds->left;
1810 if (rect->top < bounds->top)
1811 rect->top = bounds->top;
1812 if (rect->left + rect->width > bounds->left + bounds->width)
1813 rect->left = bounds->left+bounds->width - rect->width;
1814 if (rect->top + rect->height > bounds->top + bounds->height)
1815 rect->top = bounds->top+bounds->height - rect->height;
1816
1817 rect->width &= ~15L;
1818 rect->height &= ~15L;
1819
1820 if (ET61X251_PRESERVE_IMGSCALE) {
1821 /* Calculate the actual scaling factor */
1822 u32 a, b;
1823 a = rect->width * rect->height;
1824 b = pix_format->width * pix_format->height;
1825 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1826 } else
1827 scale = 1;
1828
1829 if (cam->stream == STREAM_ON)
1830 if ((err = et61x251_stream_interrupt(cam)))
1831 return err;
1832
1833 if (copy_to_user(arg, &crop, sizeof(crop))) {
1834 cam->stream = stream;
1835 return -EFAULT;
1836 }
1837
1838 if (cam->module_param.force_munmap || cam->io == IO_READ)
1839 et61x251_release_buffers(cam);
1840
1841 err = et61x251_set_crop(cam, rect);
1842 if (s->set_crop)
1843 err += s->set_crop(cam, rect);
1844 err += et61x251_set_scale(cam, scale);
1845
1846 if (err) { /* atomic, no rollback in ioctl() */
1847 cam->state |= DEV_MISCONFIGURED;
1848 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
1849 "use the camera, close and open /dev/video%d again.",
1850 cam->v4ldev->num);
1851 return -EIO;
1852 }
1853
1854 s->pix_format.width = rect->width/scale;
1855 s->pix_format.height = rect->height/scale;
1856 memcpy(&(s->_rect), rect, sizeof(*rect));
1857
1858 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1859 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1860 cam->state |= DEV_MISCONFIGURED;
1861 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
1862 "use the camera, close and open /dev/video%d again.",
1863 cam->v4ldev->num);
1864 return -ENOMEM;
1865 }
1866
1867 if (cam->io == IO_READ)
1868 et61x251_empty_framequeues(cam);
1869 else if (cam->module_param.force_munmap)
1870 et61x251_requeue_outqueue(cam);
1871
1872 cam->stream = stream;
1873
1874 return 0;
1875 }
1876
1877
1878 static int
1879 et61x251_vidioc_enum_framesizes(struct et61x251_device* cam, void __user * arg)
1880 {
1881 struct v4l2_frmsizeenum frmsize;
1882
1883 if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
1884 return -EFAULT;
1885
1886 if (frmsize.index != 0)
1887 return -EINVAL;
1888
1889 if (frmsize.pixel_format != V4L2_PIX_FMT_ET61X251 &&
1890 frmsize.pixel_format != V4L2_PIX_FMT_SBGGR8)
1891 return -EINVAL;
1892
1893 frmsize.type = V4L2_FRMSIZE_TYPE_STEPWISE;
1894 frmsize.stepwise.min_width = frmsize.stepwise.step_width = 16;
1895 frmsize.stepwise.min_height = frmsize.stepwise.step_height = 16;
1896 frmsize.stepwise.max_width = cam->sensor.cropcap.bounds.width;
1897 frmsize.stepwise.max_height = cam->sensor.cropcap.bounds.height;
1898 memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
1899
1900 if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
1901 return -EFAULT;
1902
1903 return 0;
1904 }
1905
1906
1907 static int
1908 et61x251_vidioc_enum_fmt(struct et61x251_device* cam, void __user * arg)
1909 {
1910 struct v4l2_fmtdesc fmtd;
1911
1912 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
1913 return -EFAULT;
1914
1915 if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1916 return -EINVAL;
1917
1918 if (fmtd.index == 0) {
1919 strcpy(fmtd.description, "bayer rgb");
1920 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
1921 } else if (fmtd.index == 1) {
1922 strcpy(fmtd.description, "compressed");
1923 fmtd.pixelformat = V4L2_PIX_FMT_ET61X251;
1924 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
1925 } else
1926 return -EINVAL;
1927
1928 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1929 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1930
1931 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
1932 return -EFAULT;
1933
1934 return 0;
1935 }
1936
1937
1938 static int
1939 et61x251_vidioc_g_fmt(struct et61x251_device* cam, void __user * arg)
1940 {
1941 struct v4l2_format format;
1942 struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
1943
1944 if (copy_from_user(&format, arg, sizeof(format)))
1945 return -EFAULT;
1946
1947 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1948 return -EINVAL;
1949
1950 pfmt->colorspace = (pfmt->pixelformat == V4L2_PIX_FMT_ET61X251) ?
1951 0 : V4L2_COLORSPACE_SRGB;
1952 pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_ET61X251)
1953 ? 0 : (pfmt->width * pfmt->priv) / 8;
1954 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
1955 pfmt->field = V4L2_FIELD_NONE;
1956 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1957
1958 if (copy_to_user(arg, &format, sizeof(format)))
1959 return -EFAULT;
1960
1961 return 0;
1962 }
1963
1964
1965 static int
1966 et61x251_vidioc_try_s_fmt(struct et61x251_device* cam, unsigned int cmd,
1967 void __user * arg)
1968 {
1969 struct et61x251_sensor* s = &cam->sensor;
1970 struct v4l2_format format;
1971 struct v4l2_pix_format* pix;
1972 struct v4l2_pix_format* pfmt = &(s->pix_format);
1973 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1974 struct v4l2_rect rect;
1975 u8 scale;
1976 const enum et61x251_stream_state stream = cam->stream;
1977 const u32 nbuffers = cam->nbuffers;
1978 u32 i;
1979 int err = 0;
1980
1981 if (copy_from_user(&format, arg, sizeof(format)))
1982 return -EFAULT;
1983
1984 pix = &(format.fmt.pix);
1985
1986 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1987 return -EINVAL;
1988
1989 memcpy(&rect, &(s->_rect), sizeof(rect));
1990
1991 { /* calculate the actual scaling factor */
1992 u32 a, b;
1993 a = rect.width * rect.height;
1994 b = pix->width * pix->height;
1995 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1996 }
1997
1998 rect.width = scale * pix->width;
1999 rect.height = scale * pix->height;
2000
2001 if (rect.width < 16)
2002 rect.width = 16;
2003 if (rect.height < 16)
2004 rect.height = 16;
2005 if (rect.width > bounds->left + bounds->width - rect.left)
2006 rect.width = bounds->left + bounds->width - rect.left;
2007 if (rect.height > bounds->top + bounds->height - rect.top)
2008 rect.height = bounds->top + bounds->height - rect.top;
2009
2010 rect.width &= ~15L;
2011 rect.height &= ~15L;
2012
2013 { /* adjust the scaling factor */
2014 u32 a, b;
2015 a = rect.width * rect.height;
2016 b = pix->width * pix->height;
2017 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
2018 }
2019
2020 pix->width = rect.width / scale;
2021 pix->height = rect.height / scale;
2022
2023 if (pix->pixelformat != V4L2_PIX_FMT_ET61X251 &&
2024 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
2025 pix->pixelformat = pfmt->pixelformat;
2026 pix->priv = pfmt->priv; /* bpp */
2027 pix->colorspace = (pix->pixelformat == V4L2_PIX_FMT_ET61X251) ?
2028 0 : V4L2_COLORSPACE_SRGB;
2029 pix->colorspace = pfmt->colorspace;
2030 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
2031 ? 0 : (pix->width * pix->priv) / 8;
2032 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
2033 pix->field = V4L2_FIELD_NONE;
2034
2035 if (cmd == VIDIOC_TRY_FMT) {
2036 if (copy_to_user(arg, &format, sizeof(format)))
2037 return -EFAULT;
2038 return 0;
2039 }
2040
2041 if (cam->module_param.force_munmap)
2042 for (i = 0; i < cam->nbuffers; i++)
2043 if (cam->frame[i].vma_use_count) {
2044 DBG(3, "VIDIOC_S_FMT failed. "
2045 "Unmap the buffers first.");
2046 return -EBUSY;
2047 }
2048
2049 if (cam->stream == STREAM_ON)
2050 if ((err = et61x251_stream_interrupt(cam)))
2051 return err;
2052
2053 if (copy_to_user(arg, &format, sizeof(format))) {
2054 cam->stream = stream;
2055 return -EFAULT;
2056 }
2057
2058 if (cam->module_param.force_munmap || cam->io == IO_READ)
2059 et61x251_release_buffers(cam);
2060
2061 err += et61x251_set_pix_format(cam, pix);
2062 err += et61x251_set_crop(cam, &rect);
2063 if (s->set_pix_format)
2064 err += s->set_pix_format(cam, pix);
2065 if (s->set_crop)
2066 err += s->set_crop(cam, &rect);
2067 err += et61x251_set_scale(cam, scale);
2068
2069 if (err) { /* atomic, no rollback in ioctl() */
2070 cam->state |= DEV_MISCONFIGURED;
2071 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
2072 "use the camera, close and open /dev/video%d again.",
2073 cam->v4ldev->num);
2074 return -EIO;
2075 }
2076
2077 memcpy(pfmt, pix, sizeof(*pix));
2078 memcpy(&(s->_rect), &rect, sizeof(rect));
2079
2080 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2081 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
2082 cam->state |= DEV_MISCONFIGURED;
2083 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2084 "use the camera, close and open /dev/video%d again.",
2085 cam->v4ldev->num);
2086 return -ENOMEM;
2087 }
2088
2089 if (cam->io == IO_READ)
2090 et61x251_empty_framequeues(cam);
2091 else if (cam->module_param.force_munmap)
2092 et61x251_requeue_outqueue(cam);
2093
2094 cam->stream = stream;
2095
2096 return 0;
2097 }
2098
2099
2100 static int
2101 et61x251_vidioc_g_jpegcomp(struct et61x251_device* cam, void __user * arg)
2102 {
2103 if (copy_to_user(arg, &cam->compression,
2104 sizeof(cam->compression)))
2105 return -EFAULT;
2106
2107 return 0;
2108 }
2109
2110
2111 static int
2112 et61x251_vidioc_s_jpegcomp(struct et61x251_device* cam, void __user * arg)
2113 {
2114 struct v4l2_jpegcompression jc;
2115 const enum et61x251_stream_state stream = cam->stream;
2116 int err = 0;
2117
2118 if (copy_from_user(&jc, arg, sizeof(jc)))
2119 return -EFAULT;
2120
2121 if (jc.quality != 0 && jc.quality != 1)
2122 return -EINVAL;
2123
2124 if (cam->stream == STREAM_ON)
2125 if ((err = et61x251_stream_interrupt(cam)))
2126 return err;
2127
2128 err += et61x251_set_compression(cam, &jc);
2129 if (err) { /* atomic, no rollback in ioctl() */
2130 cam->state |= DEV_MISCONFIGURED;
2131 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2132 "problems. To use the camera, close and open "
2133 "/dev/video%d again.", cam->v4ldev->num);
2134 return -EIO;
2135 }
2136
2137 cam->compression.quality = jc.quality;
2138
2139 cam->stream = stream;
2140
2141 return 0;
2142 }
2143
2144
2145 static int
2146 et61x251_vidioc_reqbufs(struct et61x251_device* cam, void __user * arg)
2147 {
2148 struct v4l2_requestbuffers rb;
2149 u32 i;
2150 int err;
2151
2152 if (copy_from_user(&rb, arg, sizeof(rb)))
2153 return -EFAULT;
2154
2155 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2156 rb.memory != V4L2_MEMORY_MMAP)
2157 return -EINVAL;
2158
2159 if (cam->io == IO_READ) {
2160 DBG(3, "Close and open the device again to choose the mmap "
2161 "I/O method");
2162 return -EBUSY;
2163 }
2164
2165 for (i = 0; i < cam->nbuffers; i++)
2166 if (cam->frame[i].vma_use_count) {
2167 DBG(3, "VIDIOC_REQBUFS failed. "
2168 "Previous buffers are still mapped.");
2169 return -EBUSY;
2170 }
2171
2172 if (cam->stream == STREAM_ON)
2173 if ((err = et61x251_stream_interrupt(cam)))
2174 return err;
2175
2176 et61x251_empty_framequeues(cam);
2177
2178 et61x251_release_buffers(cam);
2179 if (rb.count)
2180 rb.count = et61x251_request_buffers(cam, rb.count, IO_MMAP);
2181
2182 if (copy_to_user(arg, &rb, sizeof(rb))) {
2183 et61x251_release_buffers(cam);
2184 cam->io = IO_NONE;
2185 return -EFAULT;
2186 }
2187
2188 cam->io = rb.count ? IO_MMAP : IO_NONE;
2189
2190 return 0;
2191 }
2192
2193
2194 static int
2195 et61x251_vidioc_querybuf(struct et61x251_device* cam, void __user * arg)
2196 {
2197 struct v4l2_buffer b;
2198
2199 if (copy_from_user(&b, arg, sizeof(b)))
2200 return -EFAULT;
2201
2202 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2203 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2204 return -EINVAL;
2205
2206 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2207
2208 if (cam->frame[b.index].vma_use_count)
2209 b.flags |= V4L2_BUF_FLAG_MAPPED;
2210
2211 if (cam->frame[b.index].state == F_DONE)
2212 b.flags |= V4L2_BUF_FLAG_DONE;
2213 else if (cam->frame[b.index].state != F_UNUSED)
2214 b.flags |= V4L2_BUF_FLAG_QUEUED;
2215
2216 if (copy_to_user(arg, &b, sizeof(b)))
2217 return -EFAULT;
2218
2219 return 0;
2220 }
2221
2222
2223 static int
2224 et61x251_vidioc_qbuf(struct et61x251_device* cam, void __user * arg)
2225 {
2226 struct v4l2_buffer b;
2227 unsigned long lock_flags;
2228
2229 if (copy_from_user(&b, arg, sizeof(b)))
2230 return -EFAULT;
2231
2232 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2233 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2234 return -EINVAL;
2235
2236 if (cam->frame[b.index].state != F_UNUSED)
2237 return -EINVAL;
2238
2239 cam->frame[b.index].state = F_QUEUED;
2240
2241 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2242 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2243 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2244
2245 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2246
2247 return 0;
2248 }
2249
2250
2251 static int
2252 et61x251_vidioc_dqbuf(struct et61x251_device* cam, struct file* filp,
2253 void __user * arg)
2254 {
2255 struct v4l2_buffer b;
2256 struct et61x251_frame_t *f;
2257 unsigned long lock_flags;
2258 long timeout;
2259
2260 if (copy_from_user(&b, arg, sizeof(b)))
2261 return -EFAULT;
2262
2263 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
2264 return -EINVAL;
2265
2266 if (list_empty(&cam->outqueue)) {
2267 if (cam->stream == STREAM_OFF)
2268 return -EINVAL;
2269 if (filp->f_flags & O_NONBLOCK)
2270 return -EAGAIN;
2271 timeout = wait_event_interruptible_timeout
2272 ( cam->wait_frame,
2273 (!list_empty(&cam->outqueue)) ||
2274 (cam->state & DEV_DISCONNECTED) ||
2275 (cam->state & DEV_MISCONFIGURED),
2276 cam->module_param.frame_timeout *
2277 1000 * msecs_to_jiffies(1) );
2278 if (timeout < 0)
2279 return timeout;
2280 if (cam->state & DEV_DISCONNECTED)
2281 return -ENODEV;
2282 if (!timeout || (cam->state & DEV_MISCONFIGURED))
2283 return -EIO;
2284 }
2285
2286 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2287 f = list_entry(cam->outqueue.next, struct et61x251_frame_t, frame);
2288 list_del(cam->outqueue.next);
2289 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2290
2291 f->state = F_UNUSED;
2292
2293 memcpy(&b, &f->buf, sizeof(b));
2294 if (f->vma_use_count)
2295 b.flags |= V4L2_BUF_FLAG_MAPPED;
2296
2297 if (copy_to_user(arg, &b, sizeof(b)))
2298 return -EFAULT;
2299
2300 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2301
2302 return 0;
2303 }
2304
2305
2306 static int
2307 et61x251_vidioc_streamon(struct et61x251_device* cam, void __user * arg)
2308 {
2309 int type;
2310
2311 if (copy_from_user(&type, arg, sizeof(type)))
2312 return -EFAULT;
2313
2314 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2315 return -EINVAL;
2316
2317 cam->stream = STREAM_ON;
2318
2319 DBG(3, "Stream on");
2320
2321 return 0;
2322 }
2323
2324
2325 static int
2326 et61x251_vidioc_streamoff(struct et61x251_device* cam, void __user * arg)
2327 {
2328 int type, err;
2329
2330 if (copy_from_user(&type, arg, sizeof(type)))
2331 return -EFAULT;
2332
2333 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2334 return -EINVAL;
2335
2336 if (cam->stream == STREAM_ON)
2337 if ((err = et61x251_stream_interrupt(cam)))
2338 return err;
2339
2340 et61x251_empty_framequeues(cam);
2341
2342 DBG(3, "Stream off");
2343
2344 return 0;
2345 }
2346
2347
2348 static int
2349 et61x251_vidioc_g_parm(struct et61x251_device* cam, void __user * arg)
2350 {
2351 struct v4l2_streamparm sp;
2352
2353 if (copy_from_user(&sp, arg, sizeof(sp)))
2354 return -EFAULT;
2355
2356 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2357 return -EINVAL;
2358
2359 sp.parm.capture.extendedmode = 0;
2360 sp.parm.capture.readbuffers = cam->nreadbuffers;
2361
2362 if (copy_to_user(arg, &sp, sizeof(sp)))
2363 return -EFAULT;
2364
2365 return 0;
2366 }
2367
2368
2369 static int
2370 et61x251_vidioc_s_parm(struct et61x251_device* cam, void __user * arg)
2371 {
2372 struct v4l2_streamparm sp;
2373
2374 if (copy_from_user(&sp, arg, sizeof(sp)))
2375 return -EFAULT;
2376
2377 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2378 return -EINVAL;
2379
2380 sp.parm.capture.extendedmode = 0;
2381
2382 if (sp.parm.capture.readbuffers == 0)
2383 sp.parm.capture.readbuffers = cam->nreadbuffers;
2384
2385 if (sp.parm.capture.readbuffers > ET61X251_MAX_FRAMES)
2386 sp.parm.capture.readbuffers = ET61X251_MAX_FRAMES;
2387
2388 if (copy_to_user(arg, &sp, sizeof(sp)))
2389 return -EFAULT;
2390
2391 cam->nreadbuffers = sp.parm.capture.readbuffers;
2392
2393 return 0;
2394 }
2395
2396
2397 static long et61x251_ioctl_v4l2(struct file *filp,
2398 unsigned int cmd, void __user *arg)
2399 {
2400 struct et61x251_device *cam = video_drvdata(filp);
2401
2402 switch (cmd) {
2403
2404 case VIDIOC_QUERYCAP:
2405 return et61x251_vidioc_querycap(cam, arg);
2406
2407 case VIDIOC_ENUMINPUT:
2408 return et61x251_vidioc_enuminput(cam, arg);
2409
2410 case VIDIOC_G_INPUT:
2411 return et61x251_vidioc_g_input(cam, arg);
2412
2413 case VIDIOC_S_INPUT:
2414 return et61x251_vidioc_s_input(cam, arg);
2415
2416 case VIDIOC_QUERYCTRL:
2417 return et61x251_vidioc_query_ctrl(cam, arg);
2418
2419 case VIDIOC_G_CTRL:
2420 return et61x251_vidioc_g_ctrl(cam, arg);
2421
2422 case VIDIOC_S_CTRL:
2423 return et61x251_vidioc_s_ctrl(cam, arg);
2424
2425 case VIDIOC_CROPCAP:
2426 return et61x251_vidioc_cropcap(cam, arg);
2427
2428 case VIDIOC_G_CROP:
2429 return et61x251_vidioc_g_crop(cam, arg);
2430
2431 case VIDIOC_S_CROP:
2432 return et61x251_vidioc_s_crop(cam, arg);
2433
2434 case VIDIOC_ENUM_FMT:
2435 return et61x251_vidioc_enum_fmt(cam, arg);
2436
2437 case VIDIOC_G_FMT:
2438 return et61x251_vidioc_g_fmt(cam, arg);
2439
2440 case VIDIOC_TRY_FMT:
2441 case VIDIOC_S_FMT:
2442 return et61x251_vidioc_try_s_fmt(cam, cmd, arg);
2443
2444 case VIDIOC_ENUM_FRAMESIZES:
2445 return et61x251_vidioc_enum_framesizes(cam, arg);
2446
2447 case VIDIOC_G_JPEGCOMP:
2448 return et61x251_vidioc_g_jpegcomp(cam, arg);
2449
2450 case VIDIOC_S_JPEGCOMP:
2451 return et61x251_vidioc_s_jpegcomp(cam, arg);
2452
2453 case VIDIOC_REQBUFS:
2454 return et61x251_vidioc_reqbufs(cam, arg);
2455
2456 case VIDIOC_QUERYBUF:
2457 return et61x251_vidioc_querybuf(cam, arg);
2458
2459 case VIDIOC_QBUF:
2460 return et61x251_vidioc_qbuf(cam, arg);
2461
2462 case VIDIOC_DQBUF:
2463 return et61x251_vidioc_dqbuf(cam, filp, arg);
2464
2465 case VIDIOC_STREAMON:
2466 return et61x251_vidioc_streamon(cam, arg);
2467
2468 case VIDIOC_STREAMOFF:
2469 return et61x251_vidioc_streamoff(cam, arg);
2470
2471 case VIDIOC_G_PARM:
2472 return et61x251_vidioc_g_parm(cam, arg);
2473
2474 case VIDIOC_S_PARM:
2475 return et61x251_vidioc_s_parm(cam, arg);
2476
2477 case VIDIOC_G_STD:
2478 case VIDIOC_S_STD:
2479 case VIDIOC_QUERYSTD:
2480 case VIDIOC_ENUMSTD:
2481 case VIDIOC_QUERYMENU:
2482 case VIDIOC_ENUM_FRAMEINTERVALS:
2483 return -EINVAL;
2484
2485 default:
2486 return -EINVAL;
2487
2488 }
2489 }
2490
2491
2492 static long et61x251_ioctl(struct file *filp,
2493 unsigned int cmd, unsigned long arg)
2494 {
2495 struct et61x251_device *cam = video_drvdata(filp);
2496 long err = 0;
2497
2498 if (mutex_lock_interruptible(&cam->fileop_mutex))
2499 return -ERESTARTSYS;
2500
2501 if (cam->state & DEV_DISCONNECTED) {
2502 DBG(1, "Device not present");
2503 mutex_unlock(&cam->fileop_mutex);
2504 return -ENODEV;
2505 }
2506
2507 if (cam->state & DEV_MISCONFIGURED) {
2508 DBG(1, "The camera is misconfigured. Close and open it "
2509 "again.");
2510 mutex_unlock(&cam->fileop_mutex);
2511 return -EIO;
2512 }
2513
2514 V4LDBG(3, "et61x251", cmd);
2515
2516 err = et61x251_ioctl_v4l2(filp, cmd, (void __user *)arg);
2517
2518 mutex_unlock(&cam->fileop_mutex);
2519
2520 return err;
2521 }
2522
2523
2524 static const struct v4l2_file_operations et61x251_fops = {
2525 .owner = THIS_MODULE,
2526 .open = et61x251_open,
2527 .release = et61x251_release,
2528 .ioctl = et61x251_ioctl,
2529 .read = et61x251_read,
2530 .poll = et61x251_poll,
2531 .mmap = et61x251_mmap,
2532 };
2533
2534 /*****************************************************************************/
2535
2536 /* It exists a single interface only. We do not need to validate anything. */
2537 static int
2538 et61x251_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
2539 {
2540 struct usb_device *udev = interface_to_usbdev(intf);
2541 struct et61x251_device* cam;
2542 static unsigned int dev_nr;
2543 unsigned int i;
2544 int err = 0;
2545
2546 if (!(cam = kzalloc(sizeof(struct et61x251_device), GFP_KERNEL)))
2547 return -ENOMEM;
2548
2549 cam->usbdev = udev;
2550
2551 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
2552 DBG(1, "kmalloc() failed");
2553 err = -ENOMEM;
2554 goto fail;
2555 }
2556
2557 if (!(cam->v4ldev = video_device_alloc())) {
2558 DBG(1, "video_device_alloc() failed");
2559 err = -ENOMEM;
2560 goto fail;
2561 }
2562
2563 DBG(2, "ET61X[12]51 PC Camera Controller detected "
2564 "(vid/pid 0x%04X:0x%04X)",id->idVendor, id->idProduct);
2565
2566 for (i = 0; et61x251_sensor_table[i]; i++) {
2567 err = et61x251_sensor_table[i](cam);
2568 if (!err)
2569 break;
2570 }
2571
2572 if (!err)
2573 DBG(2, "%s image sensor detected", cam->sensor.name);
2574 else {
2575 DBG(1, "No supported image sensor detected");
2576 err = -ENODEV;
2577 goto fail;
2578 }
2579
2580 if (et61x251_init(cam)) {
2581 DBG(1, "Initialization failed. I will retry on open().");
2582 cam->state |= DEV_MISCONFIGURED;
2583 }
2584
2585 strcpy(cam->v4ldev->name, "ET61X[12]51 PC Camera");
2586 cam->v4ldev->fops = &et61x251_fops;
2587 cam->v4ldev->minor = video_nr[dev_nr];
2588 cam->v4ldev->release = video_device_release;
2589 cam->v4ldev->parent = &udev->dev;
2590 video_set_drvdata(cam->v4ldev, cam);
2591
2592 init_completion(&cam->probe);
2593
2594 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
2595 video_nr[dev_nr]);
2596 if (err) {
2597 DBG(1, "V4L2 device registration failed");
2598 if (err == -ENFILE && video_nr[dev_nr] == -1)
2599 DBG(1, "Free /dev/videoX node not found");
2600 video_nr[dev_nr] = -1;
2601 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2602 complete_all(&cam->probe);
2603 goto fail;
2604 }
2605
2606 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->num);
2607
2608 cam->module_param.force_munmap = force_munmap[dev_nr];
2609 cam->module_param.frame_timeout = frame_timeout[dev_nr];
2610
2611 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2612
2613 #ifdef CONFIG_VIDEO_ADV_DEBUG
2614 err = et61x251_create_sysfs(cam);
2615 if (!err)
2616 DBG(2, "Optional device control through 'sysfs' "
2617 "interface ready");
2618 else
2619 DBG(2, "Failed to create 'sysfs' interface for optional "
2620 "device controlling. Error #%d", err);
2621 #else
2622 DBG(2, "Optional device control through 'sysfs' interface disabled");
2623 DBG(3, "Compile the kernel with the 'CONFIG_VIDEO_ADV_DEBUG' "
2624 "configuration option to enable it.");
2625 #endif
2626
2627 usb_set_intfdata(intf, cam);
2628 kref_init(&cam->kref);
2629 usb_get_dev(cam->usbdev);
2630
2631 complete_all(&cam->probe);
2632
2633 return 0;
2634
2635 fail:
2636 if (cam) {
2637 kfree(cam->control_buffer);
2638 if (cam->v4ldev)
2639 video_device_release(cam->v4ldev);
2640 kfree(cam);
2641 }
2642 return err;
2643 }
2644
2645
2646 static void et61x251_usb_disconnect(struct usb_interface* intf)
2647 {
2648 struct et61x251_device* cam;
2649
2650 down_write(&et61x251_dev_lock);
2651
2652 cam = usb_get_intfdata(intf);
2653
2654 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
2655
2656 if (cam->users) {
2657 DBG(2, "Device /dev/video%d is open! Deregistration and "
2658 "memory deallocation are deferred.",
2659 cam->v4ldev->num);
2660 cam->state |= DEV_MISCONFIGURED;
2661 et61x251_stop_transfer(cam);
2662 cam->state |= DEV_DISCONNECTED;
2663 wake_up_interruptible(&cam->wait_frame);
2664 wake_up(&cam->wait_stream);
2665 } else
2666 cam->state |= DEV_DISCONNECTED;
2667
2668 wake_up_interruptible_all(&cam->wait_open);
2669
2670 kref_put(&cam->kref, et61x251_release_resources);
2671
2672 up_write(&et61x251_dev_lock);
2673 }
2674
2675
2676 static struct usb_driver et61x251_usb_driver = {
2677 .name = "et61x251",
2678 .id_table = et61x251_id_table,
2679 .probe = et61x251_usb_probe,
2680 .disconnect = et61x251_usb_disconnect,
2681 };
2682
2683 /*****************************************************************************/
2684
2685 static int __init et61x251_module_init(void)
2686 {
2687 int err = 0;
2688
2689 KDBG(2, ET61X251_MODULE_NAME " v" ET61X251_MODULE_VERSION);
2690 KDBG(3, ET61X251_MODULE_AUTHOR);
2691
2692 if ((err = usb_register(&et61x251_usb_driver)))
2693 KDBG(1, "usb_register() failed");
2694
2695 return err;
2696 }
2697
2698
2699 static void __exit et61x251_module_exit(void)
2700 {
2701 usb_deregister(&et61x251_usb_driver);
2702 }
2703
2704
2705 module_init(et61x251_module_init);
2706 module_exit(et61x251_module_exit);
Linux for Ginger Game Console