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[PATCH] USB: ZC0301 driver updates
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / media / zc0301_core.c
1 /***************************************************************************
2 * Video4Linux2 driver for ZC0301 Image Processor and Control Chip *
3 * *
4 * Copyright (C) 2006 by Luca Risolia <luca.risolia@studio.unibo.it> *
5 * *
6 * Informations about the chip internals needed to enable the I2C protocol *
7 * have been taken from the documentation of the ZC030x Video4Linux1 *
8 * driver written by Andrew Birkett <andy@nobugs.org> *
9 * *
10 * This program is free software; you can redistribute it and/or modify *
11 * it under the terms of the GNU General Public License as published by *
12 * the Free Software Foundation; either version 2 of the License, or *
13 * (at your option) any later version. *
14 * *
15 * This program is distributed in the hope that it will be useful, *
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
18 * GNU General Public License for more details. *
19 * *
20 * You should have received a copy of the GNU General Public License *
21 * along with this program; if not, write to the Free Software *
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
23 ***************************************************************************/
24
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/kernel.h>
28 #include <linux/param.h>
29 #include <linux/moduleparam.h>
30 #include <linux/errno.h>
31 #include <linux/slab.h>
32 #include <linux/string.h>
33 #include <linux/device.h>
34 #include <linux/fs.h>
35 #include <linux/delay.h>
36 #include <linux/stddef.h>
37 #include <linux/compiler.h>
38 #include <linux/ioctl.h>
39 #include <linux/poll.h>
40 #include <linux/stat.h>
41 #include <linux/mm.h>
42 #include <linux/vmalloc.h>
43 #include <linux/page-flags.h>
44 #include <linux/byteorder/generic.h>
45 #include <asm/page.h>
46 #include <asm/uaccess.h>
47
48 #include "zc0301.h"
49
50 /*****************************************************************************/
51
52 #define ZC0301_MODULE_NAME "V4L2 driver for ZC0301 " \
53 "Image Processor and Control Chip"
54 #define ZC0301_MODULE_AUTHOR "(C) 2006 Luca Risolia"
55 #define ZC0301_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
56 #define ZC0301_MODULE_LICENSE "GPL"
57 #define ZC0301_MODULE_VERSION "1:1.01"
58 #define ZC0301_MODULE_VERSION_CODE KERNEL_VERSION(1, 0, 1)
59
60 /*****************************************************************************/
61
62 MODULE_DEVICE_TABLE(usb, zc0301_id_table);
63
64 MODULE_AUTHOR(ZC0301_MODULE_AUTHOR " " ZC0301_AUTHOR_EMAIL);
65 MODULE_DESCRIPTION(ZC0301_MODULE_NAME);
66 MODULE_VERSION(ZC0301_MODULE_VERSION);
67 MODULE_LICENSE(ZC0301_MODULE_LICENSE);
68
69 static short video_nr[] = {[0 ... ZC0301_MAX_DEVICES-1] = -1};
70 module_param_array(video_nr, short, NULL, 0444);
71 MODULE_PARM_DESC(video_nr,
72 "\n<-1|n[,...]> Specify V4L2 minor mode number."
73 "\n -1 = use next available (default)"
74 "\n n = use minor number n (integer >= 0)"
75 "\nYou can specify up to "
76 __MODULE_STRING(ZC0301_MAX_DEVICES) " cameras this way."
77 "\nFor example:"
78 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
79 "\nthe second registered camera and use auto for the first"
80 "\none and for every other camera."
81 "\n");
82
83 static short force_munmap[] = {[0 ... ZC0301_MAX_DEVICES-1] =
84 ZC0301_FORCE_MUNMAP};
85 module_param_array(force_munmap, bool, NULL, 0444);
86 MODULE_PARM_DESC(force_munmap,
87 "\n<0|1[,...]> Force the application to unmap previously"
88 "\nmapped buffer memory before calling any VIDIOC_S_CROP or"
89 "\nVIDIOC_S_FMT ioctl's. Not all the applications support"
90 "\nthis feature. This parameter is specific for each"
91 "\ndetected camera."
92 "\n 0 = do not force memory unmapping"
93 "\n 1 = force memory unmapping (save memory)"
94 "\nDefault value is "__MODULE_STRING(SN9C102_FORCE_MUNMAP)"."
95 "\n");
96
97 #ifdef ZC0301_DEBUG
98 static unsigned short debug = ZC0301_DEBUG_LEVEL;
99 module_param(debug, ushort, 0644);
100 MODULE_PARM_DESC(debug,
101 "\n<n> Debugging information level, from 0 to 3:"
102 "\n0 = none (use carefully)"
103 "\n1 = critical errors"
104 "\n2 = significant informations"
105 "\n3 = more verbose messages"
106 "\nLevel 3 is useful for testing only, when only "
107 "one device is used."
108 "\nDefault value is "__MODULE_STRING(ZC0301_DEBUG_LEVEL)"."
109 "\n");
110 #endif
111
112 /*****************************************************************************/
113
114 static u32
115 zc0301_request_buffers(struct zc0301_device* cam, u32 count,
116 enum zc0301_io_method io)
117 {
118 struct v4l2_pix_format* p = &(cam->sensor->pix_format);
119 struct v4l2_rect* r = &(cam->sensor->cropcap.bounds);
120 const size_t imagesize = cam->module_param.force_munmap ||
121 io == IO_READ ?
122 (p->width * p->height * p->priv) / 8 :
123 (r->width * r->height * p->priv) / 8;
124 void* buff = NULL;
125 u32 i;
126
127 if (count > ZC0301_MAX_FRAMES)
128 count = ZC0301_MAX_FRAMES;
129
130 cam->nbuffers = count;
131 while (cam->nbuffers > 0) {
132 if ((buff = vmalloc_32(cam->nbuffers * PAGE_ALIGN(imagesize))))
133 break;
134 cam->nbuffers--;
135 }
136
137 for (i = 0; i < cam->nbuffers; i++) {
138 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
139 cam->frame[i].buf.index = i;
140 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
141 cam->frame[i].buf.length = imagesize;
142 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
143 cam->frame[i].buf.sequence = 0;
144 cam->frame[i].buf.field = V4L2_FIELD_NONE;
145 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
146 cam->frame[i].buf.flags = 0;
147 }
148
149 return cam->nbuffers;
150 }
151
152
153 static void zc0301_release_buffers(struct zc0301_device* cam)
154 {
155 if (cam->nbuffers) {
156 vfree(cam->frame[0].bufmem);
157 cam->nbuffers = 0;
158 }
159 cam->frame_current = NULL;
160 }
161
162
163 static void zc0301_empty_framequeues(struct zc0301_device* cam)
164 {
165 u32 i;
166
167 INIT_LIST_HEAD(&cam->inqueue);
168 INIT_LIST_HEAD(&cam->outqueue);
169
170 for (i = 0; i < ZC0301_MAX_FRAMES; i++) {
171 cam->frame[i].state = F_UNUSED;
172 cam->frame[i].buf.bytesused = 0;
173 }
174 }
175
176
177 static void zc0301_requeue_outqueue(struct zc0301_device* cam)
178 {
179 struct zc0301_frame_t *i;
180
181 list_for_each_entry(i, &cam->outqueue, frame) {
182 i->state = F_QUEUED;
183 list_add(&i->frame, &cam->inqueue);
184 }
185
186 INIT_LIST_HEAD(&cam->outqueue);
187 }
188
189
190 static void zc0301_queue_unusedframes(struct zc0301_device* cam)
191 {
192 unsigned long lock_flags;
193 u32 i;
194
195 for (i = 0; i < cam->nbuffers; i++)
196 if (cam->frame[i].state == F_UNUSED) {
197 cam->frame[i].state = F_QUEUED;
198 spin_lock_irqsave(&cam->queue_lock, lock_flags);
199 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
200 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
201 }
202 }
203
204 /*****************************************************************************/
205
206 int zc0301_write_reg(struct zc0301_device* cam, u16 index, u16 value)
207 {
208 struct usb_device* udev = cam->usbdev;
209 int res;
210
211 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0xa0, 0x40,
212 value, index, NULL, 0, ZC0301_CTRL_TIMEOUT);
213 if (res < 0) {
214 DBG(3, "Failed to write a register (index 0x%04X, "
215 "value 0x%02X, error %d)",index, value, res);
216 return -1;
217 }
218
219 return 0;
220 }
221
222
223 int zc0301_read_reg(struct zc0301_device* cam, u16 index)
224 {
225 struct usb_device* udev = cam->usbdev;
226 u8* buff = cam->control_buffer;
227 int res;
228
229 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0xa1, 0xc0,
230 0x0001, index, buff, 1, ZC0301_CTRL_TIMEOUT);
231 if (res < 0)
232 DBG(3, "Failed to read a register (index 0x%04X, error %d)",
233 index, res);
234
235 PDBGG("Read: index 0x%04X, value: 0x%04X", index, (int)(*buff));
236
237 return (res >= 0) ? (int)(*buff) : -1;
238 }
239
240
241 int zc0301_i2c_read(struct zc0301_device* cam, u16 address, u8 length)
242 {
243 int err = 0, res, r0, r1;
244
245 err += zc0301_write_reg(cam, 0x0092, address);
246 err += zc0301_write_reg(cam, 0x0090, 0x02);
247
248 msleep(1);
249
250 res = zc0301_read_reg(cam, 0x0091);
251 if (res < 0)
252 err += res;
253 r0 = zc0301_read_reg(cam, 0x0095);
254 if (r0 < 0)
255 err += r0;
256 r1 = zc0301_read_reg(cam, 0x0096);
257 if (r1 < 0)
258 err += r1;
259
260 res = (length <= 1) ? r0 : r0 | (r1 << 8);
261
262 if (err)
263 DBG(3, "I2C read failed at address 0x%04X, value: 0x%04X",
264 address, res);
265
266
267 PDBGG("I2C read: address 0x%04X, value: 0x%04X", address, res);
268
269 return err ? -1 : res;
270 }
271
272
273 int zc0301_i2c_write(struct zc0301_device* cam, u16 address, u16 value)
274 {
275 int err = 0, res;
276
277 err += zc0301_write_reg(cam, 0x0092, address);
278 err += zc0301_write_reg(cam, 0x0093, value & 0xff);
279 err += zc0301_write_reg(cam, 0x0094, value >> 8);
280 err += zc0301_write_reg(cam, 0x0090, 0x01);
281
282 msleep(1);
283
284 res = zc0301_read_reg(cam, 0x0091);
285 if (res < 0)
286 err += res;
287
288 if (err)
289 DBG(3, "I2C write failed at address 0x%04X, value: 0x%04X",
290 address, value);
291
292 PDBGG("I2C write: address 0x%04X, value: 0x%04X", address, value);
293
294 return err ? -1 : 0;
295 }
296
297 /*****************************************************************************/
298
299 static void zc0301_urb_complete(struct urb *urb, struct pt_regs* regs)
300 {
301 struct zc0301_device* cam = urb->context;
302 struct zc0301_frame_t** f;
303 size_t imagesize;
304 u8 i;
305 int err = 0;
306
307 if (urb->status == -ENOENT)
308 return;
309
310 f = &cam->frame_current;
311
312 if (cam->stream == STREAM_INTERRUPT) {
313 cam->stream = STREAM_OFF;
314 if ((*f))
315 (*f)->state = F_QUEUED;
316 DBG(3, "Stream interrupted");
317 wake_up(&cam->wait_stream);
318 }
319
320 if (cam->state & DEV_DISCONNECTED)
321 return;
322
323 if (cam->state & DEV_MISCONFIGURED) {
324 wake_up_interruptible(&cam->wait_frame);
325 return;
326 }
327
328 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
329 goto resubmit_urb;
330
331 if (!(*f))
332 (*f) = list_entry(cam->inqueue.next, struct zc0301_frame_t,
333 frame);
334
335 imagesize = (cam->sensor->pix_format.width *
336 cam->sensor->pix_format.height *
337 cam->sensor->pix_format.priv) / 8;
338
339 for (i = 0; i < urb->number_of_packets; i++) {
340 unsigned int len, status;
341 void *pos;
342 u16* soi;
343 u8 sof;
344
345 len = urb->iso_frame_desc[i].actual_length;
346 status = urb->iso_frame_desc[i].status;
347 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
348
349 if (status) {
350 DBG(3, "Error in isochronous frame");
351 (*f)->state = F_ERROR;
352 continue;
353 }
354
355 sof = (*(soi = pos) == 0xd8ff);
356
357 PDBGG("Isochrnous frame: length %u, #%u i,", len, i);
358
359 if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR)
360 start_of_frame:
361 if (sof) {
362 (*f)->state = F_GRABBING;
363 (*f)->buf.bytesused = 0;
364 do_gettimeofday(&(*f)->buf.timestamp);
365 DBG(3, "SOF detected: new video frame");
366 }
367
368 if ((*f)->state == F_GRABBING) {
369 if (sof && (*f)->buf.bytesused)
370 goto end_of_frame;
371
372 if ((*f)->buf.bytesused + len > imagesize) {
373 DBG(3, "Video frame size exceeded");
374 (*f)->state = F_ERROR;
375 continue;
376 }
377
378 memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, len);
379 (*f)->buf.bytesused += len;
380
381 if ((*f)->buf.bytesused == imagesize) {
382 u32 b;
383 end_of_frame:
384 b = (*f)->buf.bytesused;
385 (*f)->state = F_DONE;
386 (*f)->buf.sequence= ++cam->frame_count;
387 spin_lock(&cam->queue_lock);
388 list_move_tail(&(*f)->frame, &cam->outqueue);
389 if (!list_empty(&cam->inqueue))
390 (*f) = list_entry(cam->inqueue.next,
391 struct zc0301_frame_t,
392 frame);
393 else
394 (*f) = NULL;
395 spin_unlock(&cam->queue_lock);
396 DBG(3, "Video frame captured: : %lu bytes",
397 (unsigned long)(b));
398
399 if (!(*f))
400 goto resubmit_urb;
401
402 if (sof)
403 goto start_of_frame;
404 }
405 }
406 }
407
408 resubmit_urb:
409 urb->dev = cam->usbdev;
410 err = usb_submit_urb(urb, GFP_ATOMIC);
411 if (err < 0 && err != -EPERM) {
412 cam->state |= DEV_MISCONFIGURED;
413 DBG(1, "usb_submit_urb() failed");
414 }
415
416 wake_up_interruptible(&cam->wait_frame);
417 }
418
419
420 static int zc0301_start_transfer(struct zc0301_device* cam)
421 {
422 struct usb_device *udev = cam->usbdev;
423 struct urb* urb;
424 const unsigned int wMaxPacketSize[] = {0, 128, 192, 256, 384,
425 512, 768, 1023};
426 const unsigned int psz = wMaxPacketSize[ZC0301_ALTERNATE_SETTING];
427 s8 i, j;
428 int err = 0;
429
430 for (i = 0; i < ZC0301_URBS; i++) {
431 cam->transfer_buffer[i] = kzalloc(ZC0301_ISO_PACKETS * psz,
432 GFP_KERNEL);
433 if (!cam->transfer_buffer[i]) {
434 err = -ENOMEM;
435 DBG(1, "Not enough memory");
436 goto free_buffers;
437 }
438 }
439
440 for (i = 0; i < ZC0301_URBS; i++) {
441 urb = usb_alloc_urb(ZC0301_ISO_PACKETS, GFP_KERNEL);
442 cam->urb[i] = urb;
443 if (!urb) {
444 err = -ENOMEM;
445 DBG(1, "usb_alloc_urb() failed");
446 goto free_urbs;
447 }
448 urb->dev = udev;
449 urb->context = cam;
450 urb->pipe = usb_rcvisocpipe(udev, 1);
451 urb->transfer_flags = URB_ISO_ASAP;
452 urb->number_of_packets = ZC0301_ISO_PACKETS;
453 urb->complete = zc0301_urb_complete;
454 urb->transfer_buffer = cam->transfer_buffer[i];
455 urb->transfer_buffer_length = psz * ZC0301_ISO_PACKETS;
456 urb->interval = 1;
457 for (j = 0; j < ZC0301_ISO_PACKETS; j++) {
458 urb->iso_frame_desc[j].offset = psz * j;
459 urb->iso_frame_desc[j].length = psz;
460 }
461 }
462
463 err = usb_set_interface(udev, 0, ZC0301_ALTERNATE_SETTING);
464 if (err) {
465 DBG(1, "usb_set_interface() failed");
466 goto free_urbs;
467 }
468
469 cam->frame_current = NULL;
470
471 for (i = 0; i < ZC0301_URBS; i++) {
472 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
473 if (err) {
474 for (j = i-1; j >= 0; j--)
475 usb_kill_urb(cam->urb[j]);
476 DBG(1, "usb_submit_urb() failed, error %d", err);
477 goto free_urbs;
478 }
479 }
480
481 return 0;
482
483 free_urbs:
484 for (i = 0; (i < ZC0301_URBS) && cam->urb[i]; i++)
485 usb_free_urb(cam->urb[i]);
486
487 free_buffers:
488 for (i = 0; (i < ZC0301_URBS) && cam->transfer_buffer[i]; i++)
489 kfree(cam->transfer_buffer[i]);
490
491 return err;
492 }
493
494
495 static int zc0301_stop_transfer(struct zc0301_device* cam)
496 {
497 struct usb_device *udev = cam->usbdev;
498 s8 i;
499 int err = 0;
500
501 if (cam->state & DEV_DISCONNECTED)
502 return 0;
503
504 for (i = ZC0301_URBS-1; i >= 0; i--) {
505 usb_kill_urb(cam->urb[i]);
506 usb_free_urb(cam->urb[i]);
507 kfree(cam->transfer_buffer[i]);
508 }
509
510 err = usb_set_interface(udev, 0, 0); /* 0 Mb/s */
511 if (err)
512 DBG(3, "usb_set_interface() failed");
513
514 return err;
515 }
516
517
518 static int zc0301_stream_interrupt(struct zc0301_device* cam)
519 {
520 long timeout;
521
522 cam->stream = STREAM_INTERRUPT;
523 timeout = wait_event_timeout(cam->wait_stream,
524 (cam->stream == STREAM_OFF) ||
525 (cam->state & DEV_DISCONNECTED),
526 ZC0301_URB_TIMEOUT);
527 if (cam->state & DEV_DISCONNECTED)
528 return -ENODEV;
529 else if (cam->stream != STREAM_OFF) {
530 cam->state |= DEV_MISCONFIGURED;
531 DBG(1, "URB timeout reached. The camera is misconfigured. To "
532 "use it, close and open /dev/video%d again.",
533 cam->v4ldev->minor);
534 return -EIO;
535 }
536
537 return 0;
538 }
539
540 /*****************************************************************************/
541
542 static int
543 zc0301_set_compression(struct zc0301_device* cam,
544 struct v4l2_jpegcompression* compression)
545 {
546 int r, err = 0;
547
548 if ((r = zc0301_read_reg(cam, 0x0008)) < 0)
549 err += r;
550 err += zc0301_write_reg(cam, 0x0008, r | 0x11 | compression->quality);
551
552 return err ? -EIO : 0;
553 }
554
555
556 static int zc0301_init(struct zc0301_device* cam)
557 {
558 struct zc0301_sensor* s = cam->sensor;
559 struct v4l2_control ctrl;
560 struct v4l2_queryctrl *qctrl;
561 struct v4l2_rect* rect;
562 u8 i = 0;
563 int err = 0;
564
565 if (!(cam->state & DEV_INITIALIZED)) {
566 init_waitqueue_head(&cam->open);
567 qctrl = s->qctrl;
568 rect = &(s->cropcap.defrect);
569 cam->compression.quality = ZC0301_COMPRESSION_QUALITY;
570 } else { /* use current values */
571 qctrl = s->_qctrl;
572 rect = &(s->_rect);
573 }
574
575 if (s->init) {
576 err = s->init(cam);
577 if (err) {
578 DBG(3, "Sensor initialization failed");
579 return err;
580 }
581 }
582
583 if ((err = zc0301_set_compression(cam, &cam->compression))) {
584 DBG(3, "set_compression() failed");
585 return err;
586 }
587
588 if (s->set_crop)
589 if ((err = s->set_crop(cam, rect))) {
590 DBG(3, "set_crop() failed");
591 return err;
592 }
593
594 if (s->set_ctrl) {
595 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
596 if (s->qctrl[i].id != 0 &&
597 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
598 ctrl.id = s->qctrl[i].id;
599 ctrl.value = qctrl[i].default_value;
600 err = s->set_ctrl(cam, &ctrl);
601 if (err) {
602 DBG(3, "Set %s control failed",
603 s->qctrl[i].name);
604 return err;
605 }
606 DBG(3, "Image sensor supports '%s' control",
607 s->qctrl[i].name);
608 }
609 }
610
611 if (!(cam->state & DEV_INITIALIZED)) {
612 mutex_init(&cam->fileop_mutex);
613 spin_lock_init(&cam->queue_lock);
614 init_waitqueue_head(&cam->wait_frame);
615 init_waitqueue_head(&cam->wait_stream);
616 cam->nreadbuffers = 2;
617 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
618 memcpy(&(s->_rect), &(s->cropcap.defrect),
619 sizeof(struct v4l2_rect));
620 cam->state |= DEV_INITIALIZED;
621 }
622
623 DBG(2, "Initialization succeeded");
624 return 0;
625 }
626
627
628 static void zc0301_release_resources(struct zc0301_device* cam)
629 {
630 DBG(2, "V4L2 device /dev/video%d deregistered", cam->v4ldev->minor);
631 video_set_drvdata(cam->v4ldev, NULL);
632 video_unregister_device(cam->v4ldev);
633 kfree(cam->control_buffer);
634 }
635
636 /*****************************************************************************/
637
638 static int zc0301_open(struct inode* inode, struct file* filp)
639 {
640 struct zc0301_device* cam;
641 int err = 0;
642
643 /*
644 This is the only safe way to prevent race conditions with
645 disconnect
646 */
647 if (!down_read_trylock(&zc0301_disconnect))
648 return -ERESTARTSYS;
649
650 cam = video_get_drvdata(video_devdata(filp));
651
652 if (mutex_lock_interruptible(&cam->dev_mutex)) {
653 up_read(&zc0301_disconnect);
654 return -ERESTARTSYS;
655 }
656
657 if (cam->users) {
658 DBG(2, "Device /dev/video%d is busy...", cam->v4ldev->minor);
659 if ((filp->f_flags & O_NONBLOCK) ||
660 (filp->f_flags & O_NDELAY)) {
661 err = -EWOULDBLOCK;
662 goto out;
663 }
664 mutex_unlock(&cam->dev_mutex);
665 err = wait_event_interruptible_exclusive(cam->open,
666 cam->state & DEV_DISCONNECTED
667 || !cam->users);
668 if (err) {
669 up_read(&zc0301_disconnect);
670 return err;
671 }
672 if (cam->state & DEV_DISCONNECTED) {
673 up_read(&zc0301_disconnect);
674 return -ENODEV;
675 }
676 mutex_lock(&cam->dev_mutex);
677 }
678
679
680 if (cam->state & DEV_MISCONFIGURED) {
681 err = zc0301_init(cam);
682 if (err) {
683 DBG(1, "Initialization failed again. "
684 "I will retry on next open().");
685 goto out;
686 }
687 cam->state &= ~DEV_MISCONFIGURED;
688 }
689
690 if ((err = zc0301_start_transfer(cam)))
691 goto out;
692
693 filp->private_data = cam;
694 cam->users++;
695 cam->io = IO_NONE;
696 cam->stream = STREAM_OFF;
697 cam->nbuffers = 0;
698 cam->frame_count = 0;
699 zc0301_empty_framequeues(cam);
700
701 DBG(3, "Video device /dev/video%d is open", cam->v4ldev->minor);
702
703 out:
704 mutex_unlock(&cam->dev_mutex);
705 up_read(&zc0301_disconnect);
706 return err;
707 }
708
709
710 static int zc0301_release(struct inode* inode, struct file* filp)
711 {
712 struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
713
714 mutex_lock(&cam->dev_mutex); /* prevent disconnect() to be called */
715
716 zc0301_stop_transfer(cam);
717
718 zc0301_release_buffers(cam);
719
720 if (cam->state & DEV_DISCONNECTED) {
721 zc0301_release_resources(cam);
722 mutex_unlock(&cam->dev_mutex);
723 kfree(cam);
724 return 0;
725 }
726
727 cam->users--;
728 wake_up_interruptible_nr(&cam->open, 1);
729
730 DBG(3, "Video device /dev/video%d closed", cam->v4ldev->minor);
731
732 mutex_unlock(&cam->dev_mutex);
733
734 return 0;
735 }
736
737
738 static ssize_t
739 zc0301_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
740 {
741 struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
742 struct zc0301_frame_t* f, * i;
743 unsigned long lock_flags;
744 long timeout;
745 int err = 0;
746
747 if (mutex_lock_interruptible(&cam->fileop_mutex))
748 return -ERESTARTSYS;
749
750 if (cam->state & DEV_DISCONNECTED) {
751 DBG(1, "Device not present");
752 mutex_unlock(&cam->fileop_mutex);
753 return -ENODEV;
754 }
755
756 if (cam->state & DEV_MISCONFIGURED) {
757 DBG(1, "The camera is misconfigured. Close and open it "
758 "again.");
759 mutex_unlock(&cam->fileop_mutex);
760 return -EIO;
761 }
762
763 if (cam->io == IO_MMAP) {
764 DBG(3, "Close and open the device again to choose the read "
765 "method");
766 mutex_unlock(&cam->fileop_mutex);
767 return -EINVAL;
768 }
769
770 if (cam->io == IO_NONE) {
771 if (!zc0301_request_buffers(cam, cam->nreadbuffers, IO_READ)) {
772 DBG(1, "read() failed, not enough memory");
773 mutex_unlock(&cam->fileop_mutex);
774 return -ENOMEM;
775 }
776 cam->io = IO_READ;
777 cam->stream = STREAM_ON;
778 }
779
780 if (list_empty(&cam->inqueue)) {
781 if (!list_empty(&cam->outqueue))
782 zc0301_empty_framequeues(cam);
783 zc0301_queue_unusedframes(cam);
784 }
785
786 if (!count) {
787 mutex_unlock(&cam->fileop_mutex);
788 return 0;
789 }
790
791 if (list_empty(&cam->outqueue)) {
792 if (filp->f_flags & O_NONBLOCK) {
793 mutex_unlock(&cam->fileop_mutex);
794 return -EAGAIN;
795 }
796 timeout = wait_event_interruptible_timeout
797 ( cam->wait_frame,
798 (!list_empty(&cam->outqueue)) ||
799 (cam->state & DEV_DISCONNECTED) ||
800 (cam->state & DEV_MISCONFIGURED),
801 ZC0301_FRAME_TIMEOUT );
802 if (timeout < 0) {
803 mutex_unlock(&cam->fileop_mutex);
804 return timeout;
805 }
806 if (cam->state & DEV_DISCONNECTED) {
807 mutex_unlock(&cam->fileop_mutex);
808 return -ENODEV;
809 }
810 if (!timeout || (cam->state & DEV_MISCONFIGURED)) {
811 mutex_unlock(&cam->fileop_mutex);
812 return -EIO;
813 }
814 }
815
816 f = list_entry(cam->outqueue.prev, struct zc0301_frame_t, frame);
817
818 if (count > f->buf.bytesused)
819 count = f->buf.bytesused;
820
821 if (copy_to_user(buf, f->bufmem, count)) {
822 err = -EFAULT;
823 goto exit;
824 }
825 *f_pos += count;
826
827 exit:
828 spin_lock_irqsave(&cam->queue_lock, lock_flags);
829 list_for_each_entry(i, &cam->outqueue, frame)
830 i->state = F_UNUSED;
831 INIT_LIST_HEAD(&cam->outqueue);
832 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
833
834 zc0301_queue_unusedframes(cam);
835
836 PDBGG("Frame #%lu, bytes read: %zu",
837 (unsigned long)f->buf.index, count);
838
839 mutex_unlock(&cam->fileop_mutex);
840
841 return err ? err : count;
842 }
843
844
845 static unsigned int zc0301_poll(struct file *filp, poll_table *wait)
846 {
847 struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
848 struct zc0301_frame_t* f;
849 unsigned long lock_flags;
850 unsigned int mask = 0;
851
852 if (mutex_lock_interruptible(&cam->fileop_mutex))
853 return POLLERR;
854
855 if (cam->state & DEV_DISCONNECTED) {
856 DBG(1, "Device not present");
857 goto error;
858 }
859
860 if (cam->state & DEV_MISCONFIGURED) {
861 DBG(1, "The camera is misconfigured. Close and open it "
862 "again.");
863 goto error;
864 }
865
866 if (cam->io == IO_NONE) {
867 if (!zc0301_request_buffers(cam, cam->nreadbuffers, IO_READ)) {
868 DBG(1, "poll() failed, not enough memory");
869 goto error;
870 }
871 cam->io = IO_READ;
872 cam->stream = STREAM_ON;
873 }
874
875 if (cam->io == IO_READ) {
876 spin_lock_irqsave(&cam->queue_lock, lock_flags);
877 list_for_each_entry(f, &cam->outqueue, frame)
878 f->state = F_UNUSED;
879 INIT_LIST_HEAD(&cam->outqueue);
880 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
881 zc0301_queue_unusedframes(cam);
882 }
883
884 poll_wait(filp, &cam->wait_frame, wait);
885
886 if (!list_empty(&cam->outqueue))
887 mask |= POLLIN | POLLRDNORM;
888
889 mutex_unlock(&cam->fileop_mutex);
890
891 return mask;
892
893 error:
894 mutex_unlock(&cam->fileop_mutex);
895 return POLLERR;
896 }
897
898
899 static void zc0301_vm_open(struct vm_area_struct* vma)
900 {
901 struct zc0301_frame_t* f = vma->vm_private_data;
902 f->vma_use_count++;
903 }
904
905
906 static void zc0301_vm_close(struct vm_area_struct* vma)
907 {
908 /* NOTE: buffers are not freed here */
909 struct zc0301_frame_t* f = vma->vm_private_data;
910 f->vma_use_count--;
911 }
912
913
914 static struct vm_operations_struct zc0301_vm_ops = {
915 .open = zc0301_vm_open,
916 .close = zc0301_vm_close,
917 };
918
919
920 static int zc0301_mmap(struct file* filp, struct vm_area_struct *vma)
921 {
922 struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
923 unsigned long size = vma->vm_end - vma->vm_start,
924 start = vma->vm_start;
925 void *pos;
926 u32 i;
927
928 if (mutex_lock_interruptible(&cam->fileop_mutex))
929 return -ERESTARTSYS;
930
931 if (cam->state & DEV_DISCONNECTED) {
932 DBG(1, "Device not present");
933 mutex_unlock(&cam->fileop_mutex);
934 return -ENODEV;
935 }
936
937 if (cam->state & DEV_MISCONFIGURED) {
938 DBG(1, "The camera is misconfigured. Close and open it "
939 "again.");
940 mutex_unlock(&cam->fileop_mutex);
941 return -EIO;
942 }
943
944 if (cam->io != IO_MMAP || !(vma->vm_flags & VM_WRITE) ||
945 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
946 mutex_unlock(&cam->fileop_mutex);
947 return -EINVAL;
948 }
949
950 for (i = 0; i < cam->nbuffers; i++) {
951 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
952 break;
953 }
954 if (i == cam->nbuffers) {
955 mutex_unlock(&cam->fileop_mutex);
956 return -EINVAL;
957 }
958
959 vma->vm_flags |= VM_IO;
960 vma->vm_flags |= VM_RESERVED;
961
962 pos = cam->frame[i].bufmem;
963 while (size > 0) { /* size is page-aligned */
964 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
965 mutex_unlock(&cam->fileop_mutex);
966 return -EAGAIN;
967 }
968 start += PAGE_SIZE;
969 pos += PAGE_SIZE;
970 size -= PAGE_SIZE;
971 }
972
973 vma->vm_ops = &zc0301_vm_ops;
974 vma->vm_private_data = &cam->frame[i];
975
976 zc0301_vm_open(vma);
977
978 mutex_unlock(&cam->fileop_mutex);
979
980 return 0;
981 }
982
983 /*****************************************************************************/
984
985 static int
986 zc0301_vidioc_querycap(struct zc0301_device* cam, void __user * arg)
987 {
988 struct v4l2_capability cap = {
989 .driver = "zc0301",
990 .version = ZC0301_MODULE_VERSION_CODE,
991 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
992 V4L2_CAP_STREAMING,
993 };
994
995 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
996 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
997 strlcpy(cap.bus_info, cam->usbdev->dev.bus_id,
998 sizeof(cap.bus_info));
999
1000 if (copy_to_user(arg, &cap, sizeof(cap)))
1001 return -EFAULT;
1002
1003 return 0;
1004 }
1005
1006
1007 static int
1008 zc0301_vidioc_enuminput(struct zc0301_device* cam, void __user * arg)
1009 {
1010 struct v4l2_input i;
1011
1012 if (copy_from_user(&i, arg, sizeof(i)))
1013 return -EFAULT;
1014
1015 if (i.index)
1016 return -EINVAL;
1017
1018 memset(&i, 0, sizeof(i));
1019 strcpy(i.name, "Camera");
1020 i.type = V4L2_INPUT_TYPE_CAMERA;
1021
1022 if (copy_to_user(arg, &i, sizeof(i)))
1023 return -EFAULT;
1024
1025 return 0;
1026 }
1027
1028
1029 static int
1030 zc0301_vidioc_g_input(struct zc0301_device* cam, void __user * arg)
1031 {
1032 int index = 0;
1033
1034 if (copy_to_user(arg, &index, sizeof(index)))
1035 return -EFAULT;
1036
1037 return 0;
1038 }
1039
1040
1041 static int
1042 zc0301_vidioc_s_input(struct zc0301_device* cam, void __user * arg)
1043 {
1044 int index;
1045
1046 if (copy_from_user(&index, arg, sizeof(index)))
1047 return -EFAULT;
1048
1049 if (index != 0)
1050 return -EINVAL;
1051
1052 return 0;
1053 }
1054
1055
1056 static int
1057 zc0301_vidioc_query_ctrl(struct zc0301_device* cam, void __user * arg)
1058 {
1059 struct zc0301_sensor* s = cam->sensor;
1060 struct v4l2_queryctrl qc;
1061 u8 i;
1062
1063 if (copy_from_user(&qc, arg, sizeof(qc)))
1064 return -EFAULT;
1065
1066 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1067 if (qc.id && qc.id == s->qctrl[i].id) {
1068 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1069 if (copy_to_user(arg, &qc, sizeof(qc)))
1070 return -EFAULT;
1071 return 0;
1072 }
1073
1074 return -EINVAL;
1075 }
1076
1077
1078 static int
1079 zc0301_vidioc_g_ctrl(struct zc0301_device* cam, void __user * arg)
1080 {
1081 struct zc0301_sensor* s = cam->sensor;
1082 struct v4l2_control ctrl;
1083 int err = 0;
1084 u8 i;
1085
1086 if (!s->get_ctrl && !s->set_ctrl)
1087 return -EINVAL;
1088
1089 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1090 return -EFAULT;
1091
1092 if (!s->get_ctrl) {
1093 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1094 if (ctrl.id == s->qctrl[i].id) {
1095 ctrl.value = s->_qctrl[i].default_value;
1096 goto exit;
1097 }
1098 return -EINVAL;
1099 } else
1100 err = s->get_ctrl(cam, &ctrl);
1101
1102 exit:
1103 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1104 return -EFAULT;
1105
1106 return err;
1107 }
1108
1109
1110 static int
1111 zc0301_vidioc_s_ctrl(struct zc0301_device* cam, void __user * arg)
1112 {
1113 struct zc0301_sensor* s = cam->sensor;
1114 struct v4l2_control ctrl;
1115 u8 i;
1116 int err = 0;
1117
1118 if (!s->set_ctrl)
1119 return -EINVAL;
1120
1121 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1122 return -EFAULT;
1123
1124 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1125 if (ctrl.id == s->qctrl[i].id) {
1126 if (ctrl.value < s->qctrl[i].minimum ||
1127 ctrl.value > s->qctrl[i].maximum)
1128 return -ERANGE;
1129 ctrl.value -= ctrl.value % s->qctrl[i].step;
1130 break;
1131 }
1132
1133 if ((err = s->set_ctrl(cam, &ctrl)))
1134 return err;
1135
1136 s->_qctrl[i].default_value = ctrl.value;
1137
1138 return 0;
1139 }
1140
1141
1142 static int
1143 zc0301_vidioc_cropcap(struct zc0301_device* cam, void __user * arg)
1144 {
1145 struct v4l2_cropcap* cc = &(cam->sensor->cropcap);
1146
1147 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1148 cc->pixelaspect.numerator = 1;
1149 cc->pixelaspect.denominator = 1;
1150
1151 if (copy_to_user(arg, cc, sizeof(*cc)))
1152 return -EFAULT;
1153
1154 return 0;
1155 }
1156
1157
1158 static int
1159 zc0301_vidioc_g_crop(struct zc0301_device* cam, void __user * arg)
1160 {
1161 struct zc0301_sensor* s = cam->sensor;
1162 struct v4l2_crop crop = {
1163 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1164 };
1165
1166 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1167
1168 if (copy_to_user(arg, &crop, sizeof(crop)))
1169 return -EFAULT;
1170
1171 return 0;
1172 }
1173
1174
1175 static int
1176 zc0301_vidioc_s_crop(struct zc0301_device* cam, void __user * arg)
1177 {
1178 struct zc0301_sensor* s = cam->sensor;
1179 struct v4l2_crop crop;
1180 struct v4l2_rect* rect;
1181 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1182 const enum zc0301_stream_state stream = cam->stream;
1183 const u32 nbuffers = cam->nbuffers;
1184 u32 i;
1185 int err = 0;
1186
1187 if (copy_from_user(&crop, arg, sizeof(crop)))
1188 return -EFAULT;
1189
1190 rect = &(crop.c);
1191
1192 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1193 return -EINVAL;
1194
1195 if (cam->module_param.force_munmap)
1196 for (i = 0; i < cam->nbuffers; i++)
1197 if (cam->frame[i].vma_use_count) {
1198 DBG(3, "VIDIOC_S_CROP failed. "
1199 "Unmap the buffers first.");
1200 return -EINVAL;
1201 }
1202
1203 if (!s->set_crop) {
1204 memcpy(rect, &(s->_rect), sizeof(*rect));
1205 if (copy_to_user(arg, &crop, sizeof(crop)))
1206 return -EFAULT;
1207 return 0;
1208 }
1209
1210 rect->left &= ~7L;
1211 rect->top &= ~7L;
1212 if (rect->width < 8)
1213 rect->width = 8;
1214 if (rect->height < 8)
1215 rect->height = 8;
1216 if (rect->width > bounds->width)
1217 rect->width = bounds->width;
1218 if (rect->height > bounds->height)
1219 rect->height = bounds->height;
1220 if (rect->left < bounds->left)
1221 rect->left = bounds->left;
1222 if (rect->top < bounds->top)
1223 rect->top = bounds->top;
1224 if (rect->left + rect->width > bounds->left + bounds->width)
1225 rect->left = bounds->left+bounds->width - rect->width;
1226 if (rect->top + rect->height > bounds->top + bounds->height)
1227 rect->top = bounds->top+bounds->height - rect->height;
1228 rect->width &= ~7L;
1229 rect->height &= ~7L;
1230
1231 if (cam->stream == STREAM_ON)
1232 if ((err = zc0301_stream_interrupt(cam)))
1233 return err;
1234
1235 if (copy_to_user(arg, &crop, sizeof(crop))) {
1236 cam->stream = stream;
1237 return -EFAULT;
1238 }
1239
1240 if (cam->module_param.force_munmap || cam->io == IO_READ)
1241 zc0301_release_buffers(cam);
1242
1243 if (s->set_crop)
1244 err += s->set_crop(cam, rect);
1245
1246 if (err) { /* atomic, no rollback in ioctl() */
1247 cam->state |= DEV_MISCONFIGURED;
1248 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
1249 "use the camera, close and open /dev/video%d again.",
1250 cam->v4ldev->minor);
1251 return -EIO;
1252 }
1253
1254 s->pix_format.width = rect->width;
1255 s->pix_format.height = rect->height;
1256 memcpy(&(s->_rect), rect, sizeof(*rect));
1257
1258 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1259 nbuffers != zc0301_request_buffers(cam, nbuffers, cam->io)) {
1260 cam->state |= DEV_MISCONFIGURED;
1261 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
1262 "use the camera, close and open /dev/video%d again.",
1263 cam->v4ldev->minor);
1264 return -ENOMEM;
1265 }
1266
1267 if (cam->io == IO_READ)
1268 zc0301_empty_framequeues(cam);
1269 else if (cam->module_param.force_munmap)
1270 zc0301_requeue_outqueue(cam);
1271
1272 cam->stream = stream;
1273
1274 return 0;
1275 }
1276
1277
1278 static int
1279 zc0301_vidioc_enum_fmt(struct zc0301_device* cam, void __user * arg)
1280 {
1281 struct v4l2_fmtdesc fmtd;
1282
1283 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
1284 return -EFAULT;
1285
1286 if (fmtd.index == 0) {
1287 strcpy(fmtd.description, "JPEG");
1288 fmtd.pixelformat = V4L2_PIX_FMT_JPEG;
1289 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
1290 } else
1291 return -EINVAL;
1292
1293 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1294 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1295
1296 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
1297 return -EFAULT;
1298
1299 return 0;
1300 }
1301
1302
1303 static int
1304 zc0301_vidioc_g_fmt(struct zc0301_device* cam, void __user * arg)
1305 {
1306 struct v4l2_format format;
1307 struct v4l2_pix_format* pfmt = &(cam->sensor->pix_format);
1308
1309 if (copy_from_user(&format, arg, sizeof(format)))
1310 return -EFAULT;
1311
1312 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1313 return -EINVAL;
1314
1315 pfmt->bytesperline = 0;
1316 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
1317 pfmt->field = V4L2_FIELD_NONE;
1318 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1319
1320 if (copy_to_user(arg, &format, sizeof(format)))
1321 return -EFAULT;
1322
1323 return 0;
1324 }
1325
1326
1327 static int
1328 zc0301_vidioc_try_s_fmt(struct zc0301_device* cam, unsigned int cmd,
1329 void __user * arg)
1330 {
1331 struct zc0301_sensor* s = cam->sensor;
1332 struct v4l2_format format;
1333 struct v4l2_pix_format* pix;
1334 struct v4l2_pix_format* pfmt = &(s->pix_format);
1335 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1336 struct v4l2_rect rect;
1337 const enum zc0301_stream_state stream = cam->stream;
1338 const u32 nbuffers = cam->nbuffers;
1339 u32 i;
1340 int err = 0;
1341
1342 if (copy_from_user(&format, arg, sizeof(format)))
1343 return -EFAULT;
1344
1345 pix = &(format.fmt.pix);
1346
1347 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1348 return -EINVAL;
1349
1350 memcpy(&rect, &(s->_rect), sizeof(rect));
1351
1352 if (!s->set_crop) {
1353 pix->width = rect.width;
1354 pix->height = rect.height;
1355 } else {
1356 rect.width = pix->width;
1357 rect.height = pix->height;
1358 }
1359
1360 if (rect.width < 8)
1361 rect.width = 8;
1362 if (rect.height < 8)
1363 rect.height = 8;
1364 if (rect.width > bounds->left + bounds->width - rect.left)
1365 rect.width = bounds->left + bounds->width - rect.left;
1366 if (rect.height > bounds->top + bounds->height - rect.top)
1367 rect.height = bounds->top + bounds->height - rect.top;
1368 rect.width &= ~7L;
1369 rect.height &= ~7L;
1370
1371 pix->width = rect.width;
1372 pix->height = rect.height;
1373 pix->pixelformat = pfmt->pixelformat;
1374 pix->priv = pfmt->priv;
1375 pix->colorspace = pfmt->colorspace;
1376 pix->bytesperline = 0;
1377 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
1378 pix->field = V4L2_FIELD_NONE;
1379
1380 if (cmd == VIDIOC_TRY_FMT) {
1381 if (copy_to_user(arg, &format, sizeof(format)))
1382 return -EFAULT;
1383 return 0;
1384 }
1385
1386 if (cam->module_param.force_munmap)
1387 for (i = 0; i < cam->nbuffers; i++)
1388 if (cam->frame[i].vma_use_count) {
1389 DBG(3, "VIDIOC_S_FMT failed. "
1390 "Unmap the buffers first.");
1391 return -EINVAL;
1392 }
1393
1394 if (cam->stream == STREAM_ON)
1395 if ((err = zc0301_stream_interrupt(cam)))
1396 return err;
1397
1398 if (copy_to_user(arg, &format, sizeof(format))) {
1399 cam->stream = stream;
1400 return -EFAULT;
1401 }
1402
1403 if (cam->module_param.force_munmap || cam->io == IO_READ)
1404 zc0301_release_buffers(cam);
1405
1406 if (s->set_crop)
1407 err += s->set_crop(cam, &rect);
1408
1409 if (err) { /* atomic, no rollback in ioctl() */
1410 cam->state |= DEV_MISCONFIGURED;
1411 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
1412 "use the camera, close and open /dev/video%d again.",
1413 cam->v4ldev->minor);
1414 return -EIO;
1415 }
1416
1417 memcpy(pfmt, pix, sizeof(*pix));
1418 memcpy(&(s->_rect), &rect, sizeof(rect));
1419
1420 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1421 nbuffers != zc0301_request_buffers(cam, nbuffers, cam->io)) {
1422 cam->state |= DEV_MISCONFIGURED;
1423 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
1424 "use the camera, close and open /dev/video%d again.",
1425 cam->v4ldev->minor);
1426 return -ENOMEM;
1427 }
1428
1429 if (cam->io == IO_READ)
1430 zc0301_empty_framequeues(cam);
1431 else if (cam->module_param.force_munmap)
1432 zc0301_requeue_outqueue(cam);
1433
1434 cam->stream = stream;
1435
1436 return 0;
1437 }
1438
1439
1440 static int
1441 zc0301_vidioc_g_jpegcomp(struct zc0301_device* cam, void __user * arg)
1442 {
1443 if (copy_to_user(arg, &cam->compression, sizeof(cam->compression)))
1444 return -EFAULT;
1445
1446 return 0;
1447 }
1448
1449
1450 static int
1451 zc0301_vidioc_s_jpegcomp(struct zc0301_device* cam, void __user * arg)
1452 {
1453 struct v4l2_jpegcompression jc;
1454 const enum zc0301_stream_state stream = cam->stream;
1455 int err = 0;
1456
1457 if (copy_from_user(&jc, arg, sizeof(jc)))
1458 return -EFAULT;
1459
1460 if (jc.quality != 0)
1461 return -EINVAL;
1462
1463 if (cam->stream == STREAM_ON)
1464 if ((err = zc0301_stream_interrupt(cam)))
1465 return err;
1466
1467 err += zc0301_set_compression(cam, &jc);
1468 if (err) { /* atomic, no rollback in ioctl() */
1469 cam->state |= DEV_MISCONFIGURED;
1470 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
1471 "problems. To use the camera, close and open "
1472 "/dev/video%d again.", cam->v4ldev->minor);
1473 return -EIO;
1474 }
1475
1476 cam->compression.quality = jc.quality;
1477
1478 cam->stream = stream;
1479
1480 return 0;
1481 }
1482
1483
1484 static int
1485 zc0301_vidioc_reqbufs(struct zc0301_device* cam, void __user * arg)
1486 {
1487 struct v4l2_requestbuffers rb;
1488 u32 i;
1489 int err;
1490
1491 if (copy_from_user(&rb, arg, sizeof(rb)))
1492 return -EFAULT;
1493
1494 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1495 rb.memory != V4L2_MEMORY_MMAP)
1496 return -EINVAL;
1497
1498 if (cam->io == IO_READ) {
1499 DBG(3, "Close and open the device again to choose the mmap "
1500 "I/O method");
1501 return -EINVAL;
1502 }
1503
1504 for (i = 0; i < cam->nbuffers; i++)
1505 if (cam->frame[i].vma_use_count) {
1506 DBG(3, "VIDIOC_REQBUFS failed. "
1507 "Previous buffers are still mapped.");
1508 return -EINVAL;
1509 }
1510
1511 if (cam->stream == STREAM_ON)
1512 if ((err = zc0301_stream_interrupt(cam)))
1513 return err;
1514
1515 zc0301_empty_framequeues(cam);
1516
1517 zc0301_release_buffers(cam);
1518 if (rb.count)
1519 rb.count = zc0301_request_buffers(cam, rb.count, IO_MMAP);
1520
1521 if (copy_to_user(arg, &rb, sizeof(rb))) {
1522 zc0301_release_buffers(cam);
1523 cam->io = IO_NONE;
1524 return -EFAULT;
1525 }
1526
1527 cam->io = rb.count ? IO_MMAP : IO_NONE;
1528
1529 return 0;
1530 }
1531
1532
1533 static int
1534 zc0301_vidioc_querybuf(struct zc0301_device* cam, void __user * arg)
1535 {
1536 struct v4l2_buffer b;
1537
1538 if (copy_from_user(&b, arg, sizeof(b)))
1539 return -EFAULT;
1540
1541 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1542 b.index >= cam->nbuffers || cam->io != IO_MMAP)
1543 return -EINVAL;
1544
1545 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
1546
1547 if (cam->frame[b.index].vma_use_count)
1548 b.flags |= V4L2_BUF_FLAG_MAPPED;
1549
1550 if (cam->frame[b.index].state == F_DONE)
1551 b.flags |= V4L2_BUF_FLAG_DONE;
1552 else if (cam->frame[b.index].state != F_UNUSED)
1553 b.flags |= V4L2_BUF_FLAG_QUEUED;
1554
1555 if (copy_to_user(arg, &b, sizeof(b)))
1556 return -EFAULT;
1557
1558 return 0;
1559 }
1560
1561
1562 static int
1563 zc0301_vidioc_qbuf(struct zc0301_device* cam, void __user * arg)
1564 {
1565 struct v4l2_buffer b;
1566 unsigned long lock_flags;
1567
1568 if (copy_from_user(&b, arg, sizeof(b)))
1569 return -EFAULT;
1570
1571 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1572 b.index >= cam->nbuffers || cam->io != IO_MMAP)
1573 return -EINVAL;
1574
1575 if (cam->frame[b.index].state != F_UNUSED)
1576 return -EINVAL;
1577
1578 cam->frame[b.index].state = F_QUEUED;
1579
1580 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1581 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
1582 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1583
1584 PDBGG("Frame #%lu queued", (unsigned long)b.index);
1585
1586 return 0;
1587 }
1588
1589
1590 static int
1591 zc0301_vidioc_dqbuf(struct zc0301_device* cam, struct file* filp,
1592 void __user * arg)
1593 {
1594 struct v4l2_buffer b;
1595 struct zc0301_frame_t *f;
1596 unsigned long lock_flags;
1597 long timeout;
1598
1599 if (copy_from_user(&b, arg, sizeof(b)))
1600 return -EFAULT;
1601
1602 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
1603 return -EINVAL;
1604
1605 if (list_empty(&cam->outqueue)) {
1606 if (cam->stream == STREAM_OFF)
1607 return -EINVAL;
1608 if (filp->f_flags & O_NONBLOCK)
1609 return -EAGAIN;
1610 timeout = wait_event_interruptible_timeout
1611 ( cam->wait_frame,
1612 (!list_empty(&cam->outqueue)) ||
1613 (cam->state & DEV_DISCONNECTED) ||
1614 (cam->state & DEV_MISCONFIGURED),
1615 ZC0301_FRAME_TIMEOUT );
1616 if (timeout < 0)
1617 return timeout;
1618 if (cam->state & DEV_DISCONNECTED)
1619 return -ENODEV;
1620 if (!timeout || (cam->state & DEV_MISCONFIGURED))
1621 return -EIO;
1622 }
1623
1624 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1625 f = list_entry(cam->outqueue.next, struct zc0301_frame_t, frame);
1626 list_del(cam->outqueue.next);
1627 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1628
1629 f->state = F_UNUSED;
1630
1631 memcpy(&b, &f->buf, sizeof(b));
1632 if (f->vma_use_count)
1633 b.flags |= V4L2_BUF_FLAG_MAPPED;
1634
1635 if (copy_to_user(arg, &b, sizeof(b)))
1636 return -EFAULT;
1637
1638 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
1639
1640 return 0;
1641 }
1642
1643
1644 static int
1645 zc0301_vidioc_streamon(struct zc0301_device* cam, void __user * arg)
1646 {
1647 int type;
1648
1649 if (copy_from_user(&type, arg, sizeof(type)))
1650 return -EFAULT;
1651
1652 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
1653 return -EINVAL;
1654
1655 if (list_empty(&cam->inqueue))
1656 return -EINVAL;
1657
1658 cam->stream = STREAM_ON;
1659
1660 DBG(3, "Stream on");
1661
1662 return 0;
1663 }
1664
1665
1666 static int
1667 zc0301_vidioc_streamoff(struct zc0301_device* cam, void __user * arg)
1668 {
1669 int type, err;
1670
1671 if (copy_from_user(&type, arg, sizeof(type)))
1672 return -EFAULT;
1673
1674 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
1675 return -EINVAL;
1676
1677 if (cam->stream == STREAM_ON)
1678 if ((err = zc0301_stream_interrupt(cam)))
1679 return err;
1680
1681 zc0301_empty_framequeues(cam);
1682
1683 DBG(3, "Stream off");
1684
1685 return 0;
1686 }
1687
1688
1689 static int
1690 zc0301_vidioc_g_parm(struct zc0301_device* cam, void __user * arg)
1691 {
1692 struct v4l2_streamparm sp;
1693
1694 if (copy_from_user(&sp, arg, sizeof(sp)))
1695 return -EFAULT;
1696
1697 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1698 return -EINVAL;
1699
1700 sp.parm.capture.extendedmode = 0;
1701 sp.parm.capture.readbuffers = cam->nreadbuffers;
1702
1703 if (copy_to_user(arg, &sp, sizeof(sp)))
1704 return -EFAULT;
1705
1706 return 0;
1707 }
1708
1709
1710 static int
1711 zc0301_vidioc_s_parm(struct zc0301_device* cam, void __user * arg)
1712 {
1713 struct v4l2_streamparm sp;
1714
1715 if (copy_from_user(&sp, arg, sizeof(sp)))
1716 return -EFAULT;
1717
1718 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1719 return -EINVAL;
1720
1721 sp.parm.capture.extendedmode = 0;
1722
1723 if (sp.parm.capture.readbuffers == 0)
1724 sp.parm.capture.readbuffers = cam->nreadbuffers;
1725
1726 if (sp.parm.capture.readbuffers > ZC0301_MAX_FRAMES)
1727 sp.parm.capture.readbuffers = ZC0301_MAX_FRAMES;
1728
1729 if (copy_to_user(arg, &sp, sizeof(sp)))
1730 return -EFAULT;
1731
1732 cam->nreadbuffers = sp.parm.capture.readbuffers;
1733
1734 return 0;
1735 }
1736
1737
1738 static int zc0301_ioctl_v4l2(struct inode* inode, struct file* filp,
1739 unsigned int cmd, void __user * arg)
1740 {
1741 struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
1742
1743 switch (cmd) {
1744
1745 case VIDIOC_QUERYCAP:
1746 return zc0301_vidioc_querycap(cam, arg);
1747
1748 case VIDIOC_ENUMINPUT:
1749 return zc0301_vidioc_enuminput(cam, arg);
1750
1751 case VIDIOC_G_INPUT:
1752 return zc0301_vidioc_g_input(cam, arg);
1753
1754 case VIDIOC_S_INPUT:
1755 return zc0301_vidioc_s_input(cam, arg);
1756
1757 case VIDIOC_QUERYCTRL:
1758 return zc0301_vidioc_query_ctrl(cam, arg);
1759
1760 case VIDIOC_G_CTRL:
1761 return zc0301_vidioc_g_ctrl(cam, arg);
1762
1763 case VIDIOC_S_CTRL_OLD:
1764 case VIDIOC_S_CTRL:
1765 return zc0301_vidioc_s_ctrl(cam, arg);
1766
1767 case VIDIOC_CROPCAP_OLD:
1768 case VIDIOC_CROPCAP:
1769 return zc0301_vidioc_cropcap(cam, arg);
1770
1771 case VIDIOC_G_CROP:
1772 return zc0301_vidioc_g_crop(cam, arg);
1773
1774 case VIDIOC_S_CROP:
1775 return zc0301_vidioc_s_crop(cam, arg);
1776
1777 case VIDIOC_ENUM_FMT:
1778 return zc0301_vidioc_enum_fmt(cam, arg);
1779
1780 case VIDIOC_G_FMT:
1781 return zc0301_vidioc_g_fmt(cam, arg);
1782
1783 case VIDIOC_TRY_FMT:
1784 case VIDIOC_S_FMT:
1785 return zc0301_vidioc_try_s_fmt(cam, cmd, arg);
1786
1787 case VIDIOC_G_JPEGCOMP:
1788 return zc0301_vidioc_g_jpegcomp(cam, arg);
1789
1790 case VIDIOC_S_JPEGCOMP:
1791 return zc0301_vidioc_s_jpegcomp(cam, arg);
1792
1793 case VIDIOC_REQBUFS:
1794 return zc0301_vidioc_reqbufs(cam, arg);
1795
1796 case VIDIOC_QUERYBUF:
1797 return zc0301_vidioc_querybuf(cam, arg);
1798
1799 case VIDIOC_QBUF:
1800 return zc0301_vidioc_qbuf(cam, arg);
1801
1802 case VIDIOC_DQBUF:
1803 return zc0301_vidioc_dqbuf(cam, filp, arg);
1804
1805 case VIDIOC_STREAMON:
1806 return zc0301_vidioc_streamon(cam, arg);
1807
1808 case VIDIOC_STREAMOFF:
1809 return zc0301_vidioc_streamoff(cam, arg);
1810
1811 case VIDIOC_G_PARM:
1812 return zc0301_vidioc_g_parm(cam, arg);
1813
1814 case VIDIOC_S_PARM_OLD:
1815 case VIDIOC_S_PARM:
1816 return zc0301_vidioc_s_parm(cam, arg);
1817
1818 case VIDIOC_G_STD:
1819 case VIDIOC_S_STD:
1820 case VIDIOC_QUERYSTD:
1821 case VIDIOC_ENUMSTD:
1822 case VIDIOC_QUERYMENU:
1823 return -EINVAL;
1824
1825 default:
1826 return -EINVAL;
1827
1828 }
1829 }
1830
1831
1832 static int zc0301_ioctl(struct inode* inode, struct file* filp,
1833 unsigned int cmd, unsigned long arg)
1834 {
1835 struct zc0301_device* cam = video_get_drvdata(video_devdata(filp));
1836 int err = 0;
1837
1838 if (mutex_lock_interruptible(&cam->fileop_mutex))
1839 return -ERESTARTSYS;
1840
1841 if (cam->state & DEV_DISCONNECTED) {
1842 DBG(1, "Device not present");
1843 mutex_unlock(&cam->fileop_mutex);
1844 return -ENODEV;
1845 }
1846
1847 if (cam->state & DEV_MISCONFIGURED) {
1848 DBG(1, "The camera is misconfigured. Close and open it "
1849 "again.");
1850 mutex_unlock(&cam->fileop_mutex);
1851 return -EIO;
1852 }
1853
1854 V4LDBG(3, "zc0301", cmd);
1855
1856 err = zc0301_ioctl_v4l2(inode, filp, cmd, (void __user *)arg);
1857
1858 mutex_unlock(&cam->fileop_mutex);
1859
1860 return err;
1861 }
1862
1863
1864 static struct file_operations zc0301_fops = {
1865 .owner = THIS_MODULE,
1866 .open = zc0301_open,
1867 .release = zc0301_release,
1868 .ioctl = zc0301_ioctl,
1869 .read = zc0301_read,
1870 .poll = zc0301_poll,
1871 .mmap = zc0301_mmap,
1872 .llseek = no_llseek,
1873 };
1874
1875 /*****************************************************************************/
1876
1877 static int
1878 zc0301_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
1879 {
1880 struct usb_device *udev = interface_to_usbdev(intf);
1881 struct zc0301_device* cam;
1882 static unsigned int dev_nr = 0;
1883 unsigned int i;
1884 int err = 0;
1885
1886 if (!(cam = kzalloc(sizeof(struct zc0301_device), GFP_KERNEL)))
1887 return -ENOMEM;
1888
1889 cam->usbdev = udev;
1890
1891 if (!(cam->control_buffer = kzalloc(4, GFP_KERNEL))) {
1892 DBG(1, "kmalloc() failed");
1893 err = -ENOMEM;
1894 goto fail;
1895 }
1896
1897 if (!(cam->v4ldev = video_device_alloc())) {
1898 DBG(1, "video_device_alloc() failed");
1899 err = -ENOMEM;
1900 goto fail;
1901 }
1902
1903 mutex_init(&cam->dev_mutex);
1904
1905 DBG(2, "ZC0301 Image Processor and Control Chip detected "
1906 "(vid/pid 0x%04X/0x%04X)",id->idVendor, id->idProduct);
1907
1908 for (i = 0; zc0301_sensor_table[i]; i++) {
1909 err = zc0301_sensor_table[i](cam);
1910 if (!err)
1911 break;
1912 }
1913
1914 if (!err && cam->sensor)
1915 DBG(2, "%s image sensor detected", cam->sensor->name);
1916 else {
1917 DBG(1, "No supported image sensor detected");
1918 err = -ENODEV;
1919 goto fail;
1920 }
1921
1922 if (zc0301_init(cam)) {
1923 DBG(1, "Initialization failed. I will retry on open().");
1924 cam->state |= DEV_MISCONFIGURED;
1925 }
1926
1927 strcpy(cam->v4ldev->name, "ZC0301 PC Camera");
1928 cam->v4ldev->owner = THIS_MODULE;
1929 cam->v4ldev->type = VID_TYPE_CAPTURE | VID_TYPE_SCALES;
1930 cam->v4ldev->hardware = 0;
1931 cam->v4ldev->fops = &zc0301_fops;
1932 cam->v4ldev->minor = video_nr[dev_nr];
1933 cam->v4ldev->release = video_device_release;
1934 video_set_drvdata(cam->v4ldev, cam);
1935
1936 mutex_lock(&cam->dev_mutex);
1937
1938 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
1939 video_nr[dev_nr]);
1940 if (err) {
1941 DBG(1, "V4L2 device registration failed");
1942 if (err == -ENFILE && video_nr[dev_nr] == -1)
1943 DBG(1, "Free /dev/videoX node not found");
1944 video_nr[dev_nr] = -1;
1945 dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0;
1946 mutex_unlock(&cam->dev_mutex);
1947 goto fail;
1948 }
1949
1950 DBG(2, "V4L2 device registered as /dev/video%d", cam->v4ldev->minor);
1951
1952 cam->module_param.force_munmap = force_munmap[dev_nr];
1953
1954 dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0;
1955
1956 usb_set_intfdata(intf, cam);
1957
1958 mutex_unlock(&cam->dev_mutex);
1959
1960 return 0;
1961
1962 fail:
1963 if (cam) {
1964 kfree(cam->control_buffer);
1965 if (cam->v4ldev)
1966 video_device_release(cam->v4ldev);
1967 kfree(cam);
1968 }
1969 return err;
1970 }
1971
1972
1973 static void zc0301_usb_disconnect(struct usb_interface* intf)
1974 {
1975 struct zc0301_device* cam = usb_get_intfdata(intf);
1976
1977 if (!cam)
1978 return;
1979
1980 down_write(&zc0301_disconnect);
1981
1982 mutex_lock(&cam->dev_mutex);
1983
1984 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
1985
1986 wake_up_interruptible_all(&cam->open);
1987
1988 if (cam->users) {
1989 DBG(2, "Device /dev/video%d is open! Deregistration and "
1990 "memory deallocation are deferred on close.",
1991 cam->v4ldev->minor);
1992 cam->state |= DEV_MISCONFIGURED;
1993 zc0301_stop_transfer(cam);
1994 cam->state |= DEV_DISCONNECTED;
1995 wake_up_interruptible(&cam->wait_frame);
1996 wake_up(&cam->wait_stream);
1997 } else {
1998 cam->state |= DEV_DISCONNECTED;
1999 zc0301_release_resources(cam);
2000 }
2001
2002 mutex_unlock(&cam->dev_mutex);
2003
2004 if (!cam->users)
2005 kfree(cam);
2006
2007 up_write(&zc0301_disconnect);
2008 }
2009
2010
2011 static struct usb_driver zc0301_usb_driver = {
2012 .name = "zc0301",
2013 .id_table = zc0301_id_table,
2014 .probe = zc0301_usb_probe,
2015 .disconnect = zc0301_usb_disconnect,
2016 };
2017
2018 /*****************************************************************************/
2019
2020 static int __init zc0301_module_init(void)
2021 {
2022 int err = 0;
2023
2024 KDBG(2, ZC0301_MODULE_NAME " v" ZC0301_MODULE_VERSION);
2025 KDBG(3, ZC0301_MODULE_AUTHOR);
2026
2027 if ((err = usb_register(&zc0301_usb_driver)))
2028 KDBG(1, "usb_register() failed");
2029
2030 return err;
2031 }
2032
2033
2034 static void __exit zc0301_module_exit(void)
2035 {
2036 usb_deregister(&zc0301_usb_driver);
2037 }
2038
2039
2040 module_init(zc0301_module_init);
2041 module_exit(zc0301_module_exit);
kernel source for telekom puls (alcatel/mediatek)