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V4L/DVB (3599): Implement new routing commands for wm8775 and cs53l32a.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / media / et61x251_core.c
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, struct pt_regs* regs)
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 void et61x251_create_sysfs(struct et61x251_device* cam)
977 {
978 struct video_device *v4ldev = cam->v4ldev;
979
980 video_device_create_file(v4ldev, &class_device_attr_reg);
981 video_device_create_file(v4ldev, &class_device_attr_val);
982 if (cam->sensor.sysfs_ops) {
983 video_device_create_file(v4ldev, &class_device_attr_i2c_reg);
984 video_device_create_file(v4ldev, &class_device_attr_i2c_val);
985 }
986 }
987 #endif /* CONFIG_VIDEO_ADV_DEBUG */
988
989 /*****************************************************************************/
990
991 static int
992 et61x251_set_pix_format(struct et61x251_device* cam,
993 struct v4l2_pix_format* pix)
994 {
995 int r, err = 0;
996
997 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
998 err += r;
999 if (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1000 err += et61x251_write_reg(cam, r & 0xfd, 0x12);
1001 else
1002 err += et61x251_write_reg(cam, r | 0x02, 0x12);
1003
1004 return err ? -EIO : 0;
1005 }
1006
1007
1008 static int
1009 et61x251_set_compression(struct et61x251_device* cam,
1010 struct v4l2_jpegcompression* compression)
1011 {
1012 int r, err = 0;
1013
1014 if ((r = et61x251_read_reg(cam, 0x12)) < 0)
1015 err += r;
1016 if (compression->quality == 0)
1017 err += et61x251_write_reg(cam, r & 0xfb, 0x12);
1018 else
1019 err += et61x251_write_reg(cam, r | 0x04, 0x12);
1020
1021 return err ? -EIO : 0;
1022 }
1023
1024
1025 static int et61x251_set_scale(struct et61x251_device* cam, u8 scale)
1026 {
1027 int r = 0, err = 0;
1028
1029 r = et61x251_read_reg(cam, 0x12);
1030 if (r < 0)
1031 err += r;
1032
1033 if (scale == 1)
1034 err += et61x251_write_reg(cam, r & ~0x01, 0x12);
1035 else if (scale == 2)
1036 err += et61x251_write_reg(cam, r | 0x01, 0x12);
1037
1038 if (err)
1039 return -EIO;
1040
1041 PDBGG("Scaling factor: %u", scale);
1042
1043 return 0;
1044 }
1045
1046
1047 static int
1048 et61x251_set_crop(struct et61x251_device* cam, struct v4l2_rect* rect)
1049 {
1050 struct et61x251_sensor* s = &cam->sensor;
1051 u16 fmw_sx = (u16)(rect->left - s->cropcap.bounds.left +
1052 s->active_pixel.left),
1053 fmw_sy = (u16)(rect->top - s->cropcap.bounds.top +
1054 s->active_pixel.top),
1055 fmw_length = (u16)(rect->width),
1056 fmw_height = (u16)(rect->height);
1057 int err = 0;
1058
1059 err += et61x251_write_reg(cam, fmw_sx & 0xff, 0x69);
1060 err += et61x251_write_reg(cam, fmw_sy & 0xff, 0x6a);
1061 err += et61x251_write_reg(cam, fmw_length & 0xff, 0x6b);
1062 err += et61x251_write_reg(cam, fmw_height & 0xff, 0x6c);
1063 err += et61x251_write_reg(cam, (fmw_sx >> 8) | ((fmw_sy & 0x300) >> 6)
1064 | ((fmw_length & 0x300) >> 4)
1065 | ((fmw_height & 0x300) >> 2), 0x6d);
1066 if (err)
1067 return -EIO;
1068
1069 PDBGG("fmw_sx, fmw_sy, fmw_length, fmw_height: %u %u %u %u",
1070 fmw_sx, fmw_sy, fmw_length, fmw_height);
1071
1072 return 0;
1073 }
1074
1075
1076 static int et61x251_init(struct et61x251_device* cam)
1077 {
1078 struct et61x251_sensor* s = &cam->sensor;
1079 struct v4l2_control ctrl;
1080 struct v4l2_queryctrl *qctrl;
1081 struct v4l2_rect* rect;
1082 u8 i = 0;
1083 int err = 0;
1084
1085 if (!(cam->state & DEV_INITIALIZED)) {
1086 init_waitqueue_head(&cam->open);
1087 qctrl = s->qctrl;
1088 rect = &(s->cropcap.defrect);
1089 cam->compression.quality = ET61X251_COMPRESSION_QUALITY;
1090 } else { /* use current values */
1091 qctrl = s->_qctrl;
1092 rect = &(s->_rect);
1093 }
1094
1095 err += et61x251_set_scale(cam, rect->width / s->pix_format.width);
1096 err += et61x251_set_crop(cam, rect);
1097 if (err)
1098 return err;
1099
1100 if (s->init) {
1101 err = s->init(cam);
1102 if (err) {
1103 DBG(3, "Sensor initialization failed");
1104 return err;
1105 }
1106 }
1107
1108 err += et61x251_set_compression(cam, &cam->compression);
1109 err += et61x251_set_pix_format(cam, &s->pix_format);
1110 if (s->set_pix_format)
1111 err += s->set_pix_format(cam, &s->pix_format);
1112 if (err)
1113 return err;
1114
1115 if (s->pix_format.pixelformat == V4L2_PIX_FMT_ET61X251)
1116 DBG(3, "Compressed video format is active, quality %d",
1117 cam->compression.quality);
1118 else
1119 DBG(3, "Uncompressed video format is active");
1120
1121 if (s->set_crop)
1122 if ((err = s->set_crop(cam, rect))) {
1123 DBG(3, "set_crop() failed");
1124 return err;
1125 }
1126
1127 if (s->set_ctrl) {
1128 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1129 if (s->qctrl[i].id != 0 &&
1130 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
1131 ctrl.id = s->qctrl[i].id;
1132 ctrl.value = qctrl[i].default_value;
1133 err = s->set_ctrl(cam, &ctrl);
1134 if (err) {
1135 DBG(3, "Set %s control failed",
1136 s->qctrl[i].name);
1137 return err;
1138 }
1139 DBG(3, "Image sensor supports '%s' control",
1140 s->qctrl[i].name);
1141 }
1142 }
1143
1144 if (!(cam->state & DEV_INITIALIZED)) {
1145 mutex_init(&cam->fileop_mutex);
1146 spin_lock_init(&cam->queue_lock);
1147 init_waitqueue_head(&cam->wait_frame);
1148 init_waitqueue_head(&cam->wait_stream);
1149 cam->nreadbuffers = 2;
1150 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
1151 memcpy(&(s->_rect), &(s->cropcap.defrect),
1152 sizeof(struct v4l2_rect));
1153 cam->state |= DEV_INITIALIZED;
1154 }
1155
1156 DBG(2, "Initialization succeeded");
1157 return 0;
1158 }
1159
1160
1161 static void et61x251_release_resources(struct et61x251_device* cam)
1162 {
1163 mutex_lock(&et61x251_sysfs_lock);
1164
1165 DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor);
1166 video_set_drvdata(cam->v4ldev, NULL);
1167 video_unregister_device(cam->v4ldev);
1168
1169 usb_put_dev(cam->usbdev);
1170
1171 mutex_unlock(&et61x251_sysfs_lock);
1172
1173 kfree(cam->control_buffer);
1174 }
1175
1176 /*****************************************************************************/
1177
1178 static int et61x251_open(struct inode* inode, struct file* filp)
1179 {
1180 struct et61x251_device* cam;
1181 int err = 0;
1182
1183 /*
1184 This is the only safe way to prevent race conditions with
1185 disconnect
1186 */
1187 if (!down_read_trylock(&et61x251_disconnect))
1188 return -ERESTARTSYS;
1189
1190 cam = video_get_drvdata(video_devdata(filp));
1191
1192 if (mutex_lock_interruptible(&cam->dev_mutex)) {
1193 up_read(&et61x251_disconnect);
1194 return -ERESTARTSYS;
1195 }
1196
1197 if (cam->users) {
1198 DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor);
1199 if ((filp->f_flags & O_NONBLOCK) ||
1200 (filp->f_flags & O_NDELAY)) {
1201 err = -EWOULDBLOCK;
1202 goto out;
1203 }
1204 mutex_unlock(&cam->dev_mutex);
1205 err = wait_event_interruptible_exclusive(cam->open,
1206 cam->state & DEV_DISCONNECTED
1207 || !cam->users);
1208 if (err) {
1209 up_read(&et61x251_disconnect);
1210 return err;
1211 }
1212 if (cam->state & DEV_DISCONNECTED) {
1213 up_read(&et61x251_disconnect);
1214 return -ENODEV;
1215 }
1216 mutex_lock(&cam->dev_mutex);
1217 }
1218
1219
1220 if (cam->state & DEV_MISCONFIGURED) {
1221 err = et61x251_init(cam);
1222 if (err) {
1223 DBG(1, "Initialization failed again. "
1224 "I will retry on next open().");
1225 goto out;
1226 }
1227 cam->state &= ~DEV_MISCONFIGURED;
1228 }
1229
1230 if ((err = et61x251_start_transfer(cam)))
1231 goto out;
1232
1233 filp->private_data = cam;
1234 cam->users++;
1235 cam->io = IO_NONE;
1236 cam->stream = STREAM_OFF;
1237 cam->nbuffers = 0;
1238 cam->frame_count = 0;
1239 et61x251_empty_framequeues(cam);
1240
1241 DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor);
1242
1243 out:
1244 mutex_unlock(&cam->dev_mutex);
1245 up_read(&et61x251_disconnect);
1246 return err;
1247 }
1248
1249
1250 static int et61x251_release(struct inode* inode, struct file* filp)
1251 {
1252 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1253
1254 mutex_lock(&cam->dev_mutex); /* prevent disconnect() to be called */
1255
1256 et61x251_stop_transfer(cam);
1257
1258 et61x251_release_buffers(cam);
1259
1260 if (cam->state & DEV_DISCONNECTED) {
1261 et61x251_release_resources(cam);
1262 mutex_unlock(&cam->dev_mutex);
1263 kfree(cam);
1264 return 0;
1265 }
1266
1267 cam->users--;
1268 wake_up_interruptible_nr(&cam->open, 1);
1269
1270 DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor);
1271
1272 mutex_unlock(&cam->dev_mutex);
1273
1274 return 0;
1275 }
1276
1277
1278 static ssize_t
1279 et61x251_read(struct file* filp, char __user * buf,
1280 size_t count, loff_t* f_pos)
1281 {
1282 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1283 struct et61x251_frame_t* f, * i;
1284 unsigned long lock_flags;
1285 long timeout;
1286 int err = 0;
1287
1288 if (mutex_lock_interruptible(&cam->fileop_mutex))
1289 return -ERESTARTSYS;
1290
1291 if (cam->state & DEV_DISCONNECTED) {
1292 DBG(1, "Device not present");
1293 mutex_unlock(&cam->fileop_mutex);
1294 return -ENODEV;
1295 }
1296
1297 if (cam->state & DEV_MISCONFIGURED) {
1298 DBG(1, "The camera is misconfigured. Close and open it "
1299 "again.");
1300 mutex_unlock(&cam->fileop_mutex);
1301 return -EIO;
1302 }
1303
1304 if (cam->io == IO_MMAP) {
1305 DBG(3, "Close and open the device again to choose the read "
1306 "method");
1307 mutex_unlock(&cam->fileop_mutex);
1308 return -EINVAL;
1309 }
1310
1311 if (cam->io == IO_NONE) {
1312 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1313 IO_READ)) {
1314 DBG(1, "read() failed, not enough memory");
1315 mutex_unlock(&cam->fileop_mutex);
1316 return -ENOMEM;
1317 }
1318 cam->io = IO_READ;
1319 cam->stream = STREAM_ON;
1320 }
1321
1322 if (list_empty(&cam->inqueue)) {
1323 if (!list_empty(&cam->outqueue))
1324 et61x251_empty_framequeues(cam);
1325 et61x251_queue_unusedframes(cam);
1326 }
1327
1328 if (!count) {
1329 mutex_unlock(&cam->fileop_mutex);
1330 return 0;
1331 }
1332
1333 if (list_empty(&cam->outqueue)) {
1334 if (filp->f_flags & O_NONBLOCK) {
1335 mutex_unlock(&cam->fileop_mutex);
1336 return -EAGAIN;
1337 }
1338 timeout = wait_event_interruptible_timeout
1339 ( cam->wait_frame,
1340 (!list_empty(&cam->outqueue)) ||
1341 (cam->state & DEV_DISCONNECTED) ||
1342 (cam->state & DEV_MISCONFIGURED),
1343 cam->module_param.frame_timeout *
1344 1000 * msecs_to_jiffies(1) );
1345 if (timeout < 0) {
1346 mutex_unlock(&cam->fileop_mutex);
1347 return timeout;
1348 }
1349 if (cam->state & DEV_DISCONNECTED) {
1350 mutex_unlock(&cam->fileop_mutex);
1351 return -ENODEV;
1352 }
1353 if (!timeout || (cam->state & DEV_MISCONFIGURED)) {
1354 mutex_unlock(&cam->fileop_mutex);
1355 return -EIO;
1356 }
1357 }
1358
1359 f = list_entry(cam->outqueue.prev, struct et61x251_frame_t, frame);
1360
1361 if (count > f->buf.bytesused)
1362 count = f->buf.bytesused;
1363
1364 if (copy_to_user(buf, f->bufmem, count)) {
1365 err = -EFAULT;
1366 goto exit;
1367 }
1368 *f_pos += count;
1369
1370 exit:
1371 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1372 list_for_each_entry(i, &cam->outqueue, frame)
1373 i->state = F_UNUSED;
1374 INIT_LIST_HEAD(&cam->outqueue);
1375 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1376
1377 et61x251_queue_unusedframes(cam);
1378
1379 PDBGG("Frame #%lu, bytes read: %zu",
1380 (unsigned long)f->buf.index, count);
1381
1382 mutex_unlock(&cam->fileop_mutex);
1383
1384 return err ? err : count;
1385 }
1386
1387
1388 static unsigned int et61x251_poll(struct file *filp, poll_table *wait)
1389 {
1390 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1391 struct et61x251_frame_t* f;
1392 unsigned long lock_flags;
1393 unsigned int mask = 0;
1394
1395 if (mutex_lock_interruptible(&cam->fileop_mutex))
1396 return POLLERR;
1397
1398 if (cam->state & DEV_DISCONNECTED) {
1399 DBG(1, "Device not present");
1400 goto error;
1401 }
1402
1403 if (cam->state & DEV_MISCONFIGURED) {
1404 DBG(1, "The camera is misconfigured. Close and open it "
1405 "again.");
1406 goto error;
1407 }
1408
1409 if (cam->io == IO_NONE) {
1410 if (!et61x251_request_buffers(cam, cam->nreadbuffers,
1411 IO_READ)) {
1412 DBG(1, "poll() failed, not enough memory");
1413 goto error;
1414 }
1415 cam->io = IO_READ;
1416 cam->stream = STREAM_ON;
1417 }
1418
1419 if (cam->io == IO_READ) {
1420 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1421 list_for_each_entry(f, &cam->outqueue, frame)
1422 f->state = F_UNUSED;
1423 INIT_LIST_HEAD(&cam->outqueue);
1424 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1425 et61x251_queue_unusedframes(cam);
1426 }
1427
1428 poll_wait(filp, &cam->wait_frame, wait);
1429
1430 if (!list_empty(&cam->outqueue))
1431 mask |= POLLIN | POLLRDNORM;
1432
1433 mutex_unlock(&cam->fileop_mutex);
1434
1435 return mask;
1436
1437 error:
1438 mutex_unlock(&cam->fileop_mutex);
1439 return POLLERR;
1440 }
1441
1442
1443 static void et61x251_vm_open(struct vm_area_struct* vma)
1444 {
1445 struct et61x251_frame_t* f = vma->vm_private_data;
1446 f->vma_use_count++;
1447 }
1448
1449
1450 static void et61x251_vm_close(struct vm_area_struct* vma)
1451 {
1452 /* NOTE: buffers are not freed here */
1453 struct et61x251_frame_t* f = vma->vm_private_data;
1454 f->vma_use_count--;
1455 }
1456
1457
1458 static struct vm_operations_struct et61x251_vm_ops = {
1459 .open = et61x251_vm_open,
1460 .close = et61x251_vm_close,
1461 };
1462
1463
1464 static int et61x251_mmap(struct file* filp, struct vm_area_struct *vma)
1465 {
1466 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
1467 unsigned long size = vma->vm_end - vma->vm_start,
1468 start = vma->vm_start;
1469 void *pos;
1470 u32 i;
1471
1472 if (mutex_lock_interruptible(&cam->fileop_mutex))
1473 return -ERESTARTSYS;
1474
1475 if (cam->state & DEV_DISCONNECTED) {
1476 DBG(1, "Device not present");
1477 mutex_unlock(&cam->fileop_mutex);
1478 return -ENODEV;
1479 }
1480
1481 if (cam->state & DEV_MISCONFIGURED) {
1482 DBG(1, "The camera is misconfigured. Close and open it "
1483 "again.");
1484 mutex_unlock(&cam->fileop_mutex);
1485 return -EIO;
1486 }
1487
1488 if (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
1489 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
1490 mutex_unlock(&cam->fileop_mutex);
1491 return -EINVAL;
1492 }
1493
1494 for (i = 0; i < cam->nbuffers; i++) {
1495 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
1496 break;
1497 }
1498 if (i == cam->nbuffers) {
1499 mutex_unlock(&cam->fileop_mutex);
1500 return -EINVAL;
1501 }
1502
1503 vma->vm_flags |= VM_IO;
1504 vma->vm_flags |= VM_RESERVED;
1505
1506 pos = cam->frame[i].bufmem;
1507 while (size > 0) { /* size is page-aligned */
1508 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
1509 mutex_unlock(&cam->fileop_mutex);
1510 return -EAGAIN;
1511 }
1512 start += PAGE_SIZE;
1513 pos += PAGE_SIZE;
1514 size -= PAGE_SIZE;
1515 }
1516
1517 vma->vm_ops = &et61x251_vm_ops;
1518 vma->vm_private_data = &cam->frame[i];
1519
1520 et61x251_vm_open(vma);
1521
1522 mutex_unlock(&cam->fileop_mutex);
1523
1524 return 0;
1525 }
1526
1527 /*****************************************************************************/
1528
1529 static int
1530 et61x251_vidioc_querycap(struct et61x251_device* cam, void __user * arg)
1531 {
1532 struct v4l2_capability cap = {
1533 .driver = "et61x251",
1534 .version = ET61X251_MODULE_VERSION_CODE,
1535 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1536 V4L2_CAP_STREAMING,
1537 };
1538
1539 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
1540 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
1541 strlcpy(cap.bus_info, cam->usbdev->dev.bus_id,
1542 sizeof(cap.bus_info));
1543
1544 if (copy_to_user(arg, &cap, sizeof(cap)))
1545 return -EFAULT;
1546
1547 return 0;
1548 }
1549
1550
1551 static int
1552 et61x251_vidioc_enuminput(struct et61x251_device* cam, void __user * arg)
1553 {
1554 struct v4l2_input i;
1555
1556 if (copy_from_user(&i, arg, sizeof(i)))
1557 return -EFAULT;
1558
1559 if (i.index)
1560 return -EINVAL;
1561
1562 memset(&i, 0, sizeof(i));
1563 strcpy(i.name, "Camera");
1564 i.type = V4L2_INPUT_TYPE_CAMERA;
1565
1566 if (copy_to_user(arg, &i, sizeof(i)))
1567 return -EFAULT;
1568
1569 return 0;
1570 }
1571
1572
1573 static int
1574 et61x251_vidioc_g_input(struct et61x251_device* cam, void __user * arg)
1575 {
1576 int index = 0;
1577
1578 if (copy_to_user(arg, &index, sizeof(index)))
1579 return -EFAULT;
1580
1581 return 0;
1582 }
1583
1584
1585 static int
1586 et61x251_vidioc_s_input(struct et61x251_device* cam, void __user * arg)
1587 {
1588 int index;
1589
1590 if (copy_from_user(&index, arg, sizeof(index)))
1591 return -EFAULT;
1592
1593 if (index != 0)
1594 return -EINVAL;
1595
1596 return 0;
1597 }
1598
1599
1600 static int
1601 et61x251_vidioc_query_ctrl(struct et61x251_device* cam, void __user * arg)
1602 {
1603 struct et61x251_sensor* s = &cam->sensor;
1604 struct v4l2_queryctrl qc;
1605 u8 i;
1606
1607 if (copy_from_user(&qc, arg, sizeof(qc)))
1608 return -EFAULT;
1609
1610 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1611 if (qc.id && qc.id == s->qctrl[i].id) {
1612 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1613 if (copy_to_user(arg, &qc, sizeof(qc)))
1614 return -EFAULT;
1615 return 0;
1616 }
1617
1618 return -EINVAL;
1619 }
1620
1621
1622 static int
1623 et61x251_vidioc_g_ctrl(struct et61x251_device* cam, void __user * arg)
1624 {
1625 struct et61x251_sensor* s = &cam->sensor;
1626 struct v4l2_control ctrl;
1627 int err = 0;
1628 u8 i;
1629
1630 if (!s->get_ctrl && !s->set_ctrl)
1631 return -EINVAL;
1632
1633 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1634 return -EFAULT;
1635
1636 if (!s->get_ctrl) {
1637 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1638 if (ctrl.id == s->qctrl[i].id) {
1639 ctrl.value = s->_qctrl[i].default_value;
1640 goto exit;
1641 }
1642 return -EINVAL;
1643 } else
1644 err = s->get_ctrl(cam, &ctrl);
1645
1646 exit:
1647 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1648 return -EFAULT;
1649
1650 return err;
1651 }
1652
1653
1654 static int
1655 et61x251_vidioc_s_ctrl(struct et61x251_device* cam, void __user * arg)
1656 {
1657 struct et61x251_sensor* s = &cam->sensor;
1658 struct v4l2_control ctrl;
1659 u8 i;
1660 int err = 0;
1661
1662 if (!s->set_ctrl)
1663 return -EINVAL;
1664
1665 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1666 return -EFAULT;
1667
1668 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1669 if (ctrl.id == s->qctrl[i].id) {
1670 if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
1671 return -EINVAL;
1672 if (ctrl.value < s->qctrl[i].minimum ||
1673 ctrl.value > s->qctrl[i].maximum)
1674 return -ERANGE;
1675 ctrl.value -= ctrl.value % s->qctrl[i].step;
1676 break;
1677 }
1678
1679 if ((err = s->set_ctrl(cam, &ctrl)))
1680 return err;
1681
1682 s->_qctrl[i].default_value = ctrl.value;
1683
1684 return 0;
1685 }
1686
1687
1688 static int
1689 et61x251_vidioc_cropcap(struct et61x251_device* cam, void __user * arg)
1690 {
1691 struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
1692
1693 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1694 cc->pixelaspect.numerator = 1;
1695 cc->pixelaspect.denominator = 1;
1696
1697 if (copy_to_user(arg, cc, sizeof(*cc)))
1698 return -EFAULT;
1699
1700 return 0;
1701 }
1702
1703
1704 static int
1705 et61x251_vidioc_g_crop(struct et61x251_device* cam, void __user * arg)
1706 {
1707 struct et61x251_sensor* s = &cam->sensor;
1708 struct v4l2_crop crop = {
1709 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1710 };
1711
1712 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1713
1714 if (copy_to_user(arg, &crop, sizeof(crop)))
1715 return -EFAULT;
1716
1717 return 0;
1718 }
1719
1720
1721 static int
1722 et61x251_vidioc_s_crop(struct et61x251_device* cam, void __user * arg)
1723 {
1724 struct et61x251_sensor* s = &cam->sensor;
1725 struct v4l2_crop crop;
1726 struct v4l2_rect* rect;
1727 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1728 struct v4l2_pix_format* pix_format = &(s->pix_format);
1729 u8 scale;
1730 const enum et61x251_stream_state stream = cam->stream;
1731 const u32 nbuffers = cam->nbuffers;
1732 u32 i;
1733 int err = 0;
1734
1735 if (copy_from_user(&crop, arg, sizeof(crop)))
1736 return -EFAULT;
1737
1738 rect = &(crop.c);
1739
1740 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1741 return -EINVAL;
1742
1743 if (cam->module_param.force_munmap)
1744 for (i = 0; i < cam->nbuffers; i++)
1745 if (cam->frame[i].vma_use_count) {
1746 DBG(3, "VIDIOC_S_CROP failed. "
1747 "Unmap the buffers first.");
1748 return -EINVAL;
1749 }
1750
1751 /* Preserve R,G or B origin */
1752 rect->left = (s->_rect.left & 1L) ? rect->left | 1L : rect->left & ~1L;
1753 rect->top = (s->_rect.top & 1L) ? rect->top | 1L : rect->top & ~1L;
1754
1755 if (rect->width < 4)
1756 rect->width = 4;
1757 if (rect->height < 4)
1758 rect->height = 4;
1759 if (rect->width > bounds->width)
1760 rect->width = bounds->width;
1761 if (rect->height > bounds->height)
1762 rect->height = bounds->height;
1763 if (rect->left < bounds->left)
1764 rect->left = bounds->left;
1765 if (rect->top < bounds->top)
1766 rect->top = bounds->top;
1767 if (rect->left + rect->width > bounds->left + bounds->width)
1768 rect->left = bounds->left+bounds->width - rect->width;
1769 if (rect->top + rect->height > bounds->top + bounds->height)
1770 rect->top = bounds->top+bounds->height - rect->height;
1771
1772 rect->width &= ~3L;
1773 rect->height &= ~3L;
1774
1775 if (ET61X251_PRESERVE_IMGSCALE) {
1776 /* Calculate the actual scaling factor */
1777 u32 a, b;
1778 a = rect->width * rect->height;
1779 b = pix_format->width * pix_format->height;
1780 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1781 } else
1782 scale = 1;
1783
1784 if (cam->stream == STREAM_ON)
1785 if ((err = et61x251_stream_interrupt(cam)))
1786 return err;
1787
1788 if (copy_to_user(arg, &crop, sizeof(crop))) {
1789 cam->stream = stream;
1790 return -EFAULT;
1791 }
1792
1793 if (cam->module_param.force_munmap || cam->io == IO_READ)
1794 et61x251_release_buffers(cam);
1795
1796 err = et61x251_set_crop(cam, rect);
1797 if (s->set_crop)
1798 err += s->set_crop(cam, rect);
1799 err += et61x251_set_scale(cam, scale);
1800
1801 if (err) { /* atomic, no rollback in ioctl() */
1802 cam->state |= DEV_MISCONFIGURED;
1803 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
1804 "use the camera, close and open /dev/video%d again.",
1805 cam->v4ldev->minor);
1806 return -EIO;
1807 }
1808
1809 s->pix_format.width = rect->width/scale;
1810 s->pix_format.height = rect->height/scale;
1811 memcpy(&(s->_rect), rect, sizeof(*rect));
1812
1813 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1814 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
1815 cam->state |= DEV_MISCONFIGURED;
1816 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
1817 "use the camera, close and open /dev/video%d again.",
1818 cam->v4ldev->minor);
1819 return -ENOMEM;
1820 }
1821
1822 if (cam->io == IO_READ)
1823 et61x251_empty_framequeues(cam);
1824 else if (cam->module_param.force_munmap)
1825 et61x251_requeue_outqueue(cam);
1826
1827 cam->stream = stream;
1828
1829 return 0;
1830 }
1831
1832
1833 static int
1834 et61x251_vidioc_enum_fmt(struct et61x251_device* cam, void __user * arg)
1835 {
1836 struct v4l2_fmtdesc fmtd;
1837
1838 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
1839 return -EFAULT;
1840
1841 if (fmtd.index == 0) {
1842 strcpy(fmtd.description, "bayer rgb");
1843 fmtd.pixelformat = V4L2_PIX_FMT_SBGGR8;
1844 } else if (fmtd.index == 1) {
1845 strcpy(fmtd.description, "compressed");
1846 fmtd.pixelformat = V4L2_PIX_FMT_ET61X251;
1847 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
1848 } else
1849 return -EINVAL;
1850
1851 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1852 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1853
1854 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
1855 return -EFAULT;
1856
1857 return 0;
1858 }
1859
1860
1861 static int
1862 et61x251_vidioc_g_fmt(struct et61x251_device* cam, void __user * arg)
1863 {
1864 struct v4l2_format format;
1865 struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
1866
1867 if (copy_from_user(&format, arg, sizeof(format)))
1868 return -EFAULT;
1869
1870 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1871 return -EINVAL;
1872
1873 pfmt->bytesperline = (pfmt->pixelformat==V4L2_PIX_FMT_ET61X251)
1874 ? 0 : (pfmt->width * pfmt->priv) / 8;
1875 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
1876 pfmt->field = V4L2_FIELD_NONE;
1877 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1878
1879 if (copy_to_user(arg, &format, sizeof(format)))
1880 return -EFAULT;
1881
1882 return 0;
1883 }
1884
1885
1886 static int
1887 et61x251_vidioc_try_s_fmt(struct et61x251_device* cam, unsigned int cmd,
1888 void __user * arg)
1889 {
1890 struct et61x251_sensor* s = &cam->sensor;
1891 struct v4l2_format format;
1892 struct v4l2_pix_format* pix;
1893 struct v4l2_pix_format* pfmt = &(s->pix_format);
1894 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1895 struct v4l2_rect rect;
1896 u8 scale;
1897 const enum et61x251_stream_state stream = cam->stream;
1898 const u32 nbuffers = cam->nbuffers;
1899 u32 i;
1900 int err = 0;
1901
1902 if (copy_from_user(&format, arg, sizeof(format)))
1903 return -EFAULT;
1904
1905 pix = &(format.fmt.pix);
1906
1907 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1908 return -EINVAL;
1909
1910 memcpy(&rect, &(s->_rect), sizeof(rect));
1911
1912 { /* calculate the actual scaling factor */
1913 u32 a, b;
1914 a = rect.width * rect.height;
1915 b = pix->width * pix->height;
1916 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1917 }
1918
1919 rect.width = scale * pix->width;
1920 rect.height = scale * pix->height;
1921
1922 if (rect.width < 4)
1923 rect.width = 4;
1924 if (rect.height < 4)
1925 rect.height = 4;
1926 if (rect.width > bounds->left + bounds->width - rect.left)
1927 rect.width = bounds->left + bounds->width - rect.left;
1928 if (rect.height > bounds->top + bounds->height - rect.top)
1929 rect.height = bounds->top + bounds->height - rect.top;
1930
1931 rect.width &= ~3L;
1932 rect.height &= ~3L;
1933
1934 { /* adjust the scaling factor */
1935 u32 a, b;
1936 a = rect.width * rect.height;
1937 b = pix->width * pix->height;
1938 scale = b ? (u8)((a / b) < 4 ? 1 : 2) : 1;
1939 }
1940
1941 pix->width = rect.width / scale;
1942 pix->height = rect.height / scale;
1943
1944 if (pix->pixelformat != V4L2_PIX_FMT_ET61X251 &&
1945 pix->pixelformat != V4L2_PIX_FMT_SBGGR8)
1946 pix->pixelformat = pfmt->pixelformat;
1947 pix->priv = pfmt->priv; /* bpp */
1948 pix->colorspace = pfmt->colorspace;
1949 pix->bytesperline = (pix->pixelformat == V4L2_PIX_FMT_ET61X251)
1950 ? 0 : (pix->width * pix->priv) / 8;
1951 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
1952 pix->field = V4L2_FIELD_NONE;
1953
1954 if (cmd == VIDIOC_TRY_FMT) {
1955 if (copy_to_user(arg, &format, sizeof(format)))
1956 return -EFAULT;
1957 return 0;
1958 }
1959
1960 if (cam->module_param.force_munmap)
1961 for (i = 0; i < cam->nbuffers; i++)
1962 if (cam->frame[i].vma_use_count) {
1963 DBG(3, "VIDIOC_S_FMT failed. "
1964 "Unmap the buffers first.");
1965 return -EINVAL;
1966 }
1967
1968 if (cam->stream == STREAM_ON)
1969 if ((err = et61x251_stream_interrupt(cam)))
1970 return err;
1971
1972 if (copy_to_user(arg, &format, sizeof(format))) {
1973 cam->stream = stream;
1974 return -EFAULT;
1975 }
1976
1977 if (cam->module_param.force_munmap || cam->io == IO_READ)
1978 et61x251_release_buffers(cam);
1979
1980 err += et61x251_set_pix_format(cam, pix);
1981 err += et61x251_set_crop(cam, &rect);
1982 if (s->set_pix_format)
1983 err += s->set_pix_format(cam, pix);
1984 if (s->set_crop)
1985 err += s->set_crop(cam, &rect);
1986 err += et61x251_set_scale(cam, scale);
1987
1988 if (err) { /* atomic, no rollback in ioctl() */
1989 cam->state |= DEV_MISCONFIGURED;
1990 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
1991 "use the camera, close and open /dev/video%d again.",
1992 cam->v4ldev->minor);
1993 return -EIO;
1994 }
1995
1996 memcpy(pfmt, pix, sizeof(*pix));
1997 memcpy(&(s->_rect), &rect, sizeof(rect));
1998
1999 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
2000 nbuffers != et61x251_request_buffers(cam, nbuffers, cam->io)) {
2001 cam->state |= DEV_MISCONFIGURED;
2002 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
2003 "use the camera, close and open /dev/video%d again.",
2004 cam->v4ldev->minor);
2005 return -ENOMEM;
2006 }
2007
2008 if (cam->io == IO_READ)
2009 et61x251_empty_framequeues(cam);
2010 else if (cam->module_param.force_munmap)
2011 et61x251_requeue_outqueue(cam);
2012
2013 cam->stream = stream;
2014
2015 return 0;
2016 }
2017
2018
2019 static int
2020 et61x251_vidioc_g_jpegcomp(struct et61x251_device* cam, void __user * arg)
2021 {
2022 if (copy_to_user(arg, &cam->compression,
2023 sizeof(cam->compression)))
2024 return -EFAULT;
2025
2026 return 0;
2027 }
2028
2029
2030 static int
2031 et61x251_vidioc_s_jpegcomp(struct et61x251_device* cam, void __user * arg)
2032 {
2033 struct v4l2_jpegcompression jc;
2034 const enum et61x251_stream_state stream = cam->stream;
2035 int err = 0;
2036
2037 if (copy_from_user(&jc, arg, sizeof(jc)))
2038 return -EFAULT;
2039
2040 if (jc.quality != 0 && jc.quality != 1)
2041 return -EINVAL;
2042
2043 if (cam->stream == STREAM_ON)
2044 if ((err = et61x251_stream_interrupt(cam)))
2045 return err;
2046
2047 err += et61x251_set_compression(cam, &jc);
2048 if (err) { /* atomic, no rollback in ioctl() */
2049 cam->state |= DEV_MISCONFIGURED;
2050 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
2051 "problems. To use the camera, close and open "
2052 "/dev/video%d again.", cam->v4ldev->minor);
2053 return -EIO;
2054 }
2055
2056 cam->compression.quality = jc.quality;
2057
2058 cam->stream = stream;
2059
2060 return 0;
2061 }
2062
2063
2064 static int
2065 et61x251_vidioc_reqbufs(struct et61x251_device* cam, void __user * arg)
2066 {
2067 struct v4l2_requestbuffers rb;
2068 u32 i;
2069 int err;
2070
2071 if (copy_from_user(&rb, arg, sizeof(rb)))
2072 return -EFAULT;
2073
2074 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2075 rb.memory != V4L2_MEMORY_MMAP)
2076 return -EINVAL;
2077
2078 if (cam->io == IO_READ) {
2079 DBG(3, "Close and open the device again to choose the mmap "
2080 "I/O method");
2081 return -EINVAL;
2082 }
2083
2084 for (i = 0; i < cam->nbuffers; i++)
2085 if (cam->frame[i].vma_use_count) {
2086 DBG(3, "VIDIOC_REQBUFS failed. "
2087 "Previous buffers are still mapped.");
2088 return -EINVAL;
2089 }
2090
2091 if (cam->stream == STREAM_ON)
2092 if ((err = et61x251_stream_interrupt(cam)))
2093 return err;
2094
2095 et61x251_empty_framequeues(cam);
2096
2097 et61x251_release_buffers(cam);
2098 if (rb.count)
2099 rb.count = et61x251_request_buffers(cam, rb.count, IO_MMAP);
2100
2101 if (copy_to_user(arg, &rb, sizeof(rb))) {
2102 et61x251_release_buffers(cam);
2103 cam->io = IO_NONE;
2104 return -EFAULT;
2105 }
2106
2107 cam->io = rb.count ? IO_MMAP : IO_NONE;
2108
2109 return 0;
2110 }
2111
2112
2113 static int
2114 et61x251_vidioc_querybuf(struct et61x251_device* cam, void __user * arg)
2115 {
2116 struct v4l2_buffer b;
2117
2118 if (copy_from_user(&b, arg, sizeof(b)))
2119 return -EFAULT;
2120
2121 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2122 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2123 return -EINVAL;
2124
2125 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
2126
2127 if (cam->frame[b.index].vma_use_count)
2128 b.flags |= V4L2_BUF_FLAG_MAPPED;
2129
2130 if (cam->frame[b.index].state == F_DONE)
2131 b.flags |= V4L2_BUF_FLAG_DONE;
2132 else if (cam->frame[b.index].state != F_UNUSED)
2133 b.flags |= V4L2_BUF_FLAG_QUEUED;
2134
2135 if (copy_to_user(arg, &b, sizeof(b)))
2136 return -EFAULT;
2137
2138 return 0;
2139 }
2140
2141
2142 static int
2143 et61x251_vidioc_qbuf(struct et61x251_device* cam, void __user * arg)
2144 {
2145 struct v4l2_buffer b;
2146 unsigned long lock_flags;
2147
2148 if (copy_from_user(&b, arg, sizeof(b)))
2149 return -EFAULT;
2150
2151 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
2152 b.index >= cam->nbuffers || cam->io != IO_MMAP)
2153 return -EINVAL;
2154
2155 if (cam->frame[b.index].state != F_UNUSED)
2156 return -EINVAL;
2157
2158 cam->frame[b.index].state = F_QUEUED;
2159
2160 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2161 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
2162 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2163
2164 PDBGG("Frame #%lu queued", (unsigned long)b.index);
2165
2166 return 0;
2167 }
2168
2169
2170 static int
2171 et61x251_vidioc_dqbuf(struct et61x251_device* cam, struct file* filp,
2172 void __user * arg)
2173 {
2174 struct v4l2_buffer b;
2175 struct et61x251_frame_t *f;
2176 unsigned long lock_flags;
2177 long timeout;
2178
2179 if (copy_from_user(&b, arg, sizeof(b)))
2180 return -EFAULT;
2181
2182 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
2183 return -EINVAL;
2184
2185 if (list_empty(&cam->outqueue)) {
2186 if (cam->stream == STREAM_OFF)
2187 return -EINVAL;
2188 if (filp->f_flags & O_NONBLOCK)
2189 return -EAGAIN;
2190 timeout = wait_event_interruptible_timeout
2191 ( cam->wait_frame,
2192 (!list_empty(&cam->outqueue)) ||
2193 (cam->state & DEV_DISCONNECTED) ||
2194 (cam->state & DEV_MISCONFIGURED),
2195 cam->module_param.frame_timeout *
2196 1000 * msecs_to_jiffies(1) );
2197 if (timeout < 0)
2198 return timeout;
2199 if (cam->state & DEV_DISCONNECTED)
2200 return -ENODEV;
2201 if (!timeout || (cam->state & DEV_MISCONFIGURED))
2202 return -EIO;
2203 }
2204
2205 spin_lock_irqsave(&cam->queue_lock, lock_flags);
2206 f = list_entry(cam->outqueue.next, struct et61x251_frame_t, frame);
2207 list_del(cam->outqueue.next);
2208 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
2209
2210 f->state = F_UNUSED;
2211
2212 memcpy(&b, &f->buf, sizeof(b));
2213 if (f->vma_use_count)
2214 b.flags |= V4L2_BUF_FLAG_MAPPED;
2215
2216 if (copy_to_user(arg, &b, sizeof(b)))
2217 return -EFAULT;
2218
2219 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
2220
2221 return 0;
2222 }
2223
2224
2225 static int
2226 et61x251_vidioc_streamon(struct et61x251_device* cam, void __user * arg)
2227 {
2228 int type;
2229
2230 if (copy_from_user(&type, arg, sizeof(type)))
2231 return -EFAULT;
2232
2233 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2234 return -EINVAL;
2235
2236 if (list_empty(&cam->inqueue))
2237 return -EINVAL;
2238
2239 cam->stream = STREAM_ON;
2240
2241 DBG(3, "Stream on");
2242
2243 return 0;
2244 }
2245
2246
2247 static int
2248 et61x251_vidioc_streamoff(struct et61x251_device* cam, void __user * arg)
2249 {
2250 int type, err;
2251
2252 if (copy_from_user(&type, arg, sizeof(type)))
2253 return -EFAULT;
2254
2255 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
2256 return -EINVAL;
2257
2258 if (cam->stream == STREAM_ON)
2259 if ((err = et61x251_stream_interrupt(cam)))
2260 return err;
2261
2262 et61x251_empty_framequeues(cam);
2263
2264 DBG(3, "Stream off");
2265
2266 return 0;
2267 }
2268
2269
2270 static int
2271 et61x251_vidioc_g_parm(struct et61x251_device* cam, void __user * arg)
2272 {
2273 struct v4l2_streamparm sp;
2274
2275 if (copy_from_user(&sp, arg, sizeof(sp)))
2276 return -EFAULT;
2277
2278 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2279 return -EINVAL;
2280
2281 sp.parm.capture.extendedmode = 0;
2282 sp.parm.capture.readbuffers = cam->nreadbuffers;
2283
2284 if (copy_to_user(arg, &sp, sizeof(sp)))
2285 return -EFAULT;
2286
2287 return 0;
2288 }
2289
2290
2291 static int
2292 et61x251_vidioc_s_parm(struct et61x251_device* cam, void __user * arg)
2293 {
2294 struct v4l2_streamparm sp;
2295
2296 if (copy_from_user(&sp, arg, sizeof(sp)))
2297 return -EFAULT;
2298
2299 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
2300 return -EINVAL;
2301
2302 sp.parm.capture.extendedmode = 0;
2303
2304 if (sp.parm.capture.readbuffers == 0)
2305 sp.parm.capture.readbuffers = cam->nreadbuffers;
2306
2307 if (sp.parm.capture.readbuffers > ET61X251_MAX_FRAMES)
2308 sp.parm.capture.readbuffers = ET61X251_MAX_FRAMES;
2309
2310 if (copy_to_user(arg, &sp, sizeof(sp)))
2311 return -EFAULT;
2312
2313 cam->nreadbuffers = sp.parm.capture.readbuffers;
2314
2315 return 0;
2316 }
2317
2318
2319 static int et61x251_ioctl_v4l2(struct inode* inode, struct file* filp,
2320 unsigned int cmd, void __user * arg)
2321 {
2322 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
2323
2324 switch (cmd) {
2325
2326 case VIDIOC_QUERYCAP:
2327 return et61x251_vidioc_querycap(cam, arg);
2328
2329 case VIDIOC_ENUMINPUT:
2330 return et61x251_vidioc_enuminput(cam, arg);
2331
2332 case VIDIOC_G_INPUT:
2333 return et61x251_vidioc_g_input(cam, arg);
2334
2335 case VIDIOC_S_INPUT:
2336 return et61x251_vidioc_s_input(cam, arg);
2337
2338 case VIDIOC_QUERYCTRL:
2339 return et61x251_vidioc_query_ctrl(cam, arg);
2340
2341 case VIDIOC_G_CTRL:
2342 return et61x251_vidioc_g_ctrl(cam, arg);
2343
2344 case VIDIOC_S_CTRL_OLD:
2345 case VIDIOC_S_CTRL:
2346 return et61x251_vidioc_s_ctrl(cam, arg);
2347
2348 case VIDIOC_CROPCAP_OLD:
2349 case VIDIOC_CROPCAP:
2350 return et61x251_vidioc_cropcap(cam, arg);
2351
2352 case VIDIOC_G_CROP:
2353 return et61x251_vidioc_g_crop(cam, arg);
2354
2355 case VIDIOC_S_CROP:
2356 return et61x251_vidioc_s_crop(cam, arg);
2357
2358 case VIDIOC_ENUM_FMT:
2359 return et61x251_vidioc_enum_fmt(cam, arg);
2360
2361 case VIDIOC_G_FMT:
2362 return et61x251_vidioc_g_fmt(cam, arg);
2363
2364 case VIDIOC_TRY_FMT:
2365 case VIDIOC_S_FMT:
2366 return et61x251_vidioc_try_s_fmt(cam, cmd, arg);
2367
2368 case VIDIOC_G_JPEGCOMP:
2369 return et61x251_vidioc_g_jpegcomp(cam, arg);
2370
2371 case VIDIOC_S_JPEGCOMP:
2372 return et61x251_vidioc_s_jpegcomp(cam, arg);
2373
2374 case VIDIOC_REQBUFS:
2375 return et61x251_vidioc_reqbufs(cam, arg);
2376
2377 case VIDIOC_QUERYBUF:
2378 return et61x251_vidioc_querybuf(cam, arg);
2379
2380 case VIDIOC_QBUF:
2381 return et61x251_vidioc_qbuf(cam, arg);
2382
2383 case VIDIOC_DQBUF:
2384 return et61x251_vidioc_dqbuf(cam, filp, arg);
2385
2386 case VIDIOC_STREAMON:
2387 return et61x251_vidioc_streamon(cam, arg);
2388
2389 case VIDIOC_STREAMOFF:
2390 return et61x251_vidioc_streamoff(cam, arg);
2391
2392 case VIDIOC_G_PARM:
2393 return et61x251_vidioc_g_parm(cam, arg);
2394
2395 case VIDIOC_S_PARM_OLD:
2396 case VIDIOC_S_PARM:
2397 return et61x251_vidioc_s_parm(cam, arg);
2398
2399 case VIDIOC_G_STD:
2400 case VIDIOC_S_STD:
2401 case VIDIOC_QUERYSTD:
2402 case VIDIOC_ENUMSTD:
2403 case VIDIOC_QUERYMENU:
2404 return -EINVAL;
2405
2406 default:
2407 return -EINVAL;
2408
2409 }
2410 }
2411
2412
2413 static int et61x251_ioctl(struct inode* inode, struct file* filp,
2414 unsigned int cmd, unsigned long arg)
2415 {
2416 struct et61x251_device* cam = video_get_drvdata(video_devdata(filp));
2417 int err = 0;
2418
2419 if (mutex_lock_interruptible(&cam->fileop_mutex))
2420 return -ERESTARTSYS;
2421
2422 if (cam->state & DEV_DISCONNECTED) {
2423 DBG(1, "Device not present");
2424 mutex_unlock(&cam->fileop_mutex);
2425 return -ENODEV;
2426 }
2427
2428 if (cam->state & DEV_MISCONFIGURED) {
2429 DBG(1, "The camera is misconfigured. Close and open it "
2430 "again.");
2431 mutex_unlock(&cam->fileop_mutex);
2432 return -EIO;
2433 }
2434
2435 V4LDBG(3, "et61x251", cmd);
2436
2437 err = et61x251_ioctl_v4l2(inode, filp, cmd, (void __user *)arg);
2438
2439 mutex_unlock(&cam->fileop_mutex);
2440
2441 return err;
2442 }
2443
2444
2445 static struct file_operations et61x251_fops = {
2446 .owner = THIS_MODULE,
2447 .open = et61x251_open,
2448 .release = et61x251_release,
2449 .ioctl = et61x251_ioctl,
2450 .read = et61x251_read,
2451 .poll = et61x251_poll,
2452 .mmap = et61x251_mmap,
2453 .llseek = no_llseek,
2454 };
2455
2456 /*****************************************************************************/
2457
2458 /* It exists a single interface only. We do not need to validate anything. */
2459 static int
2460 et61x251_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
2461 {
2462 struct usb_device *udev = interface_to_usbdev(intf);
2463 struct et61x251_device* cam;
2464 static unsigned int dev_nr = 0;
2465 unsigned int i;
2466 int err = 0;
2467
2468 if (!(cam = kzalloc(sizeof(struct et61x251_device), GFP_KERNEL)))
2469 return -ENOMEM;
2470
2471 cam->usbdev = udev;
2472
2473 if (!(cam->control_buffer = kzalloc(8, GFP_KERNEL))) {
2474 DBG(1, "kmalloc() failed");
2475 err = -ENOMEM;
2476 goto fail;
2477 }
2478
2479 if (!(cam->v4ldev = video_device_alloc())) {
2480 DBG(1, "video_device_alloc() failed");
2481 err = -ENOMEM;
2482 goto fail;
2483 }
2484
2485 mutex_init(&cam->dev_mutex);
2486
2487 DBG(2, "ET61X[12]51 PC Camera Controller detected "
2488 "(vid/pid 0x%04X/0x%04X)",id->idVendor, id->idProduct);
2489
2490 for (i = 0; et61x251_sensor_table[i]; i++) {
2491 err = et61x251_sensor_table[i](cam);
2492 if (!err)
2493 break;
2494 }
2495
2496 if (!err)
2497 DBG(2, "%s image sensor detected", cam->sensor.name);
2498 else {
2499 DBG(1, "No supported image sensor detected");
2500 err = -ENODEV;
2501 goto fail;
2502 }
2503
2504 if (et61x251_init(cam)) {
2505 DBG(1, "Initialization failed. I will retry on open().");
2506 cam->state |= DEV_MISCONFIGURED;
2507 }
2508
2509 strcpy(cam->v4ldev->name, "ET61X[12]51 PC Camera");
2510 cam->v4ldev->owner = THIS_MODULE;
2511 cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
2512 cam->v4ldev->hardware = 0;
2513 cam->v4ldev->fops = &et61x251_fops;
2514 cam->v4ldev->minor = video_nr[dev_nr];
2515 cam->v4ldev->release = video_device_release;
2516 video_set_drvdata(cam->v4ldev, cam);
2517
2518 mutex_lock(&cam->dev_mutex);
2519
2520 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
2521 video_nr[dev_nr]);
2522 if (err) {
2523 DBG(1, "V4L2 device registration failed");
2524 if (err == -ENFILE && video_nr[dev_nr] == -1)
2525 DBG(1, "Free /dev/videoX node not found");
2526 video_nr[dev_nr] = -1;
2527 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2528 mutex_unlock(&cam->dev_mutex);
2529 goto fail;
2530 }
2531
2532 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor);
2533
2534 cam->module_param.force_munmap = force_munmap[dev_nr];
2535 cam->module_param.frame_timeout = frame_timeout[dev_nr];
2536
2537 dev_nr = (dev_nr < ET61X251_MAX_DEVICES-1) ? dev_nr+1 : 0;
2538
2539 #ifdef CONFIG_VIDEO_ADV_DEBUG
2540 et61x251_create_sysfs(cam);
2541 DBG(2, "Optional device control through 'sysfs' interface ready");
2542 #endif
2543
2544 usb_set_intfdata(intf, cam);
2545
2546 mutex_unlock(&cam->dev_mutex);
2547
2548 return 0;
2549
2550 fail:
2551 if (cam) {
2552 kfree(cam->control_buffer);
2553 if (cam->v4ldev)
2554 video_device_release(cam->v4ldev);
2555 kfree(cam);
2556 }
2557 return err;
2558 }
2559
2560
2561 static void et61x251_usb_disconnect(struct usb_interface* intf)
2562 {
2563 struct et61x251_device* cam = usb_get_intfdata(intf);
2564
2565 if (!cam)
2566 return;
2567
2568 down_write(&et61x251_disconnect);
2569
2570 mutex_lock(&cam->dev_mutex);
2571
2572 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
2573
2574 wake_up_interruptible_all(&cam->open);
2575
2576 if (cam->users) {
2577 DBG(2, "Device /dev/video%d is open! Deregistration and "
2578 "memory deallocation are deferred on close.",
2579 cam->v4ldev->minor);
2580 cam->state |= DEV_MISCONFIGURED;
2581 et61x251_stop_transfer(cam);
2582 cam->state |= DEV_DISCONNECTED;
2583 wake_up_interruptible(&cam->wait_frame);
2584 wake_up(&cam->wait_stream);
2585 usb_get_dev(cam->usbdev);
2586 } else {
2587 cam->state |= DEV_DISCONNECTED;
2588 et61x251_release_resources(cam);
2589 }
2590
2591 mutex_unlock(&cam->dev_mutex);
2592
2593 if (!cam->users)
2594 kfree(cam);
2595
2596 up_write(&et61x251_disconnect);
2597 }
2598
2599
2600 static struct usb_driver et61x251_usb_driver = {
2601 .name = "et61x251",
2602 .id_table = et61x251_id_table,
2603 .probe = et61x251_usb_probe,
2604 .disconnect = et61x251_usb_disconnect,
2605 };
2606
2607 /*****************************************************************************/
2608
2609 static int __init et61x251_module_init(void)
2610 {
2611 int err = 0;
2612
2613 KDBG(2, ET61X251_MODULE_NAME " v" ET61X251_MODULE_VERSION);
2614 KDBG(3, ET61X251_MODULE_AUTHOR);
2615
2616 if ((err = usb_register(&et61x251_usb_driver)))
2617 KDBG(1, "usb_register() failed");
2618
2619 return err;
2620 }
2621
2622
2623 static void __exit et61x251_module_exit(void)
2624 {
2625 usb_deregister(&et61x251_usb_driver);
2626 }
2627
2628
2629 module_init(et61x251_module_init);
2630 module_exit(et61x251_module_exit);
kernel source for telekom puls (alcatel/mediatek)