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25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/kernel.h>
28#include <linux/param.h>
29#include <linux/errno.h>
30#include <linux/slab.h>
31#include <linux/device.h>
32#include <linux/fs.h>
33#include <linux/delay.h>
34#include <linux/compiler.h>
35#include <linux/ioctl.h>
36#include <linux/poll.h>
37#include <linux/stat.h>
38#include <linux/mm.h>
39#include <linux/vmalloc.h>
40#include <linux/page-flags.h>
41#include <asm/byteorder.h>
42#include <asm/page.h>
43#include <asm/uaccess.h>
44
45#include "zc0301.h"
46
47
48
49#define ZC0301_MODULE_NAME "V4L2 driver for ZC0301[P] " \
50 "Image Processor and Control Chip"
51#define ZC0301_MODULE_AUTHOR "(C) 2006-2007 Luca Risolia"
52#define ZC0301_AUTHOR_EMAIL "<luca.risolia@studio.unibo.it>"
53#define ZC0301_MODULE_LICENSE "GPL"
54#define ZC0301_MODULE_VERSION "1:1.10"
55#define ZC0301_MODULE_VERSION_CODE KERNEL_VERSION(1, 1, 10)
56
57
58
59MODULE_DEVICE_TABLE(usb, zc0301_id_table);
60
61MODULE_AUTHOR(ZC0301_MODULE_AUTHOR " " ZC0301_AUTHOR_EMAIL);
62MODULE_DESCRIPTION(ZC0301_MODULE_NAME);
63MODULE_VERSION(ZC0301_MODULE_VERSION);
64MODULE_LICENSE(ZC0301_MODULE_LICENSE);
65
66static short video_nr[] = {[0 ... ZC0301_MAX_DEVICES-1] = -1};
67module_param_array(video_nr, short, NULL, 0444);
68MODULE_PARM_DESC(video_nr,
69 "\n<-1|n[,...]> Specify V4L2 minor mode number."
70 "\n -1 = use next available (default)"
71 "\n n = use minor number n (integer >= 0)"
72 "\nYou can specify up to "
73 __MODULE_STRING(ZC0301_MAX_DEVICES) " cameras this way."
74 "\nFor example:"
75 "\nvideo_nr=-1,2,-1 would assign minor number 2 to"
76 "\nthe second registered camera and use auto for the first"
77 "\none and for every other camera."
78 "\n");
79
80static short force_munmap[] = {[0 ... ZC0301_MAX_DEVICES-1] =
81 ZC0301_FORCE_MUNMAP};
82module_param_array(force_munmap, bool, NULL, 0444);
83MODULE_PARM_DESC(force_munmap,
84 "\n<0|1[,...]> Force the application to unmap previously"
85 "\nmapped buffer memory before calling any VIDIOC_S_CROP or"
86 "\nVIDIOC_S_FMT ioctl's. Not all the applications support"
87 "\nthis feature. This parameter is specific for each"
88 "\ndetected camera."
89 "\n 0 = do not force memory unmapping"
90 "\n 1 = force memory unmapping (save memory)"
91 "\nDefault value is "__MODULE_STRING(ZC0301_FORCE_MUNMAP)"."
92 "\n");
93
94static unsigned int frame_timeout[] = {[0 ... ZC0301_MAX_DEVICES-1] =
95 ZC0301_FRAME_TIMEOUT};
96module_param_array(frame_timeout, uint, NULL, 0644);
97MODULE_PARM_DESC(frame_timeout,
98 "\n<n[,...]> Timeout for a video frame in seconds."
99 "\nThis parameter is specific for each detected camera."
100 "\nDefault value is "__MODULE_STRING(ZC0301_FRAME_TIMEOUT)"."
101 "\n");
102
103#ifdef ZC0301_DEBUG
104static unsigned short debug = ZC0301_DEBUG_LEVEL;
105module_param(debug, ushort, 0644);
106MODULE_PARM_DESC(debug,
107 "\n<n> Debugging information level, from 0 to 3:"
108 "\n0 = none (use carefully)"
109 "\n1 = critical errors"
110 "\n2 = significant informations"
111 "\n3 = more verbose messages"
112 "\nLevel 3 is useful for testing only, when only "
113 "one device is used."
114 "\nDefault value is "__MODULE_STRING(ZC0301_DEBUG_LEVEL)"."
115 "\n");
116#endif
117
118
119
120static u32
121zc0301_request_buffers(struct zc0301_device* cam, u32 count,
122 enum zc0301_io_method io)
123{
124 struct v4l2_pix_format* p = &(cam->sensor.pix_format);
125 struct v4l2_rect* r = &(cam->sensor.cropcap.bounds);
126 const size_t imagesize = cam->module_param.force_munmap ||
127 io == IO_READ ?
128 (p->width * p->height * p->priv) / 8 :
129 (r->width * r->height * p->priv) / 8;
130 void* buff = NULL;
131 u32 i;
132
133 if (count > ZC0301_MAX_FRAMES)
134 count = ZC0301_MAX_FRAMES;
135
136 cam->nbuffers = count;
137 while (cam->nbuffers > 0) {
138 if ((buff = vmalloc_32_user(cam->nbuffers *
139 PAGE_ALIGN(imagesize))))
140 break;
141 cam->nbuffers--;
142 }
143
144 for (i = 0; i < cam->nbuffers; i++) {
145 cam->frame[i].bufmem = buff + i*PAGE_ALIGN(imagesize);
146 cam->frame[i].buf.index = i;
147 cam->frame[i].buf.m.offset = i*PAGE_ALIGN(imagesize);
148 cam->frame[i].buf.length = imagesize;
149 cam->frame[i].buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
150 cam->frame[i].buf.sequence = 0;
151 cam->frame[i].buf.field = V4L2_FIELD_NONE;
152 cam->frame[i].buf.memory = V4L2_MEMORY_MMAP;
153 cam->frame[i].buf.flags = 0;
154 }
155
156 return cam->nbuffers;
157}
158
159
160static void zc0301_release_buffers(struct zc0301_device* cam)
161{
162 if (cam->nbuffers) {
163 vfree(cam->frame[0].bufmem);
164 cam->nbuffers = 0;
165 }
166 cam->frame_current = NULL;
167}
168
169
170static void zc0301_empty_framequeues(struct zc0301_device* cam)
171{
172 u32 i;
173
174 INIT_LIST_HEAD(&cam->inqueue);
175 INIT_LIST_HEAD(&cam->outqueue);
176
177 for (i = 0; i < ZC0301_MAX_FRAMES; i++) {
178 cam->frame[i].state = F_UNUSED;
179 cam->frame[i].buf.bytesused = 0;
180 }
181}
182
183
184static void zc0301_requeue_outqueue(struct zc0301_device* cam)
185{
186 struct zc0301_frame_t *i;
187
188 list_for_each_entry(i, &cam->outqueue, frame) {
189 i->state = F_QUEUED;
190 list_add(&i->frame, &cam->inqueue);
191 }
192
193 INIT_LIST_HEAD(&cam->outqueue);
194}
195
196
197static void zc0301_queue_unusedframes(struct zc0301_device* cam)
198{
199 unsigned long lock_flags;
200 u32 i;
201
202 for (i = 0; i < cam->nbuffers; i++)
203 if (cam->frame[i].state == F_UNUSED) {
204 cam->frame[i].state = F_QUEUED;
205 spin_lock_irqsave(&cam->queue_lock, lock_flags);
206 list_add_tail(&cam->frame[i].frame, &cam->inqueue);
207 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
208 }
209}
210
211
212
213int zc0301_write_reg(struct zc0301_device* cam, u16 index, u16 value)
214{
215 struct usb_device* udev = cam->usbdev;
216 int res;
217
218 res = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0xa0, 0x40,
219 value, index, NULL, 0, ZC0301_CTRL_TIMEOUT);
220 if (res < 0) {
221 DBG(3, "Failed to write a register (index 0x%04X, "
222 "value 0x%02X, error %d)",index, value, res);
223 return -1;
224 }
225
226 return 0;
227}
228
229
230int zc0301_read_reg(struct zc0301_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), 0xa1, 0xc0,
237 0x0001, index, buff, 1, ZC0301_CTRL_TIMEOUT);
238 if (res < 0)
239 DBG(3, "Failed to read a register (index 0x%04X, error %d)",
240 index, res);
241
242 PDBGG("Read: index 0x%04X, value: 0x%04X", index, (int)(*buff));
243
244 return (res >= 0) ? (int)(*buff) : -1;
245}
246
247
248int zc0301_i2c_read(struct zc0301_device* cam, u16 address, u8 length)
249{
250 int err = 0, res, r0, r1;
251
252 err += zc0301_write_reg(cam, 0x0092, address);
253 err += zc0301_write_reg(cam, 0x0090, 0x02);
254
255 msleep(1);
256
257 res = zc0301_read_reg(cam, 0x0091);
258 if (res < 0)
259 err += res;
260 r0 = zc0301_read_reg(cam, 0x0095);
261 if (r0 < 0)
262 err += r0;
263 r1 = zc0301_read_reg(cam, 0x0096);
264 if (r1 < 0)
265 err += r1;
266
267 res = (length <= 1) ? r0 : r0 | (r1 << 8);
268
269 if (err)
270 DBG(3, "I2C read failed at address 0x%04X, value: 0x%04X",
271 address, res);
272
273
274 PDBGG("I2C read: address 0x%04X, value: 0x%04X", address, res);
275
276 return err ? -1 : res;
277}
278
279
280int zc0301_i2c_write(struct zc0301_device* cam, u16 address, u16 value)
281{
282 int err = 0, res;
283
284 err += zc0301_write_reg(cam, 0x0092, address);
285 err += zc0301_write_reg(cam, 0x0093, value & 0xff);
286 err += zc0301_write_reg(cam, 0x0094, value >> 8);
287 err += zc0301_write_reg(cam, 0x0090, 0x01);
288
289 msleep(1);
290
291 res = zc0301_read_reg(cam, 0x0091);
292 if (res < 0)
293 err += res;
294
295 if (err)
296 DBG(3, "I2C write failed at address 0x%04X, value: 0x%04X",
297 address, value);
298
299 PDBGG("I2C write: address 0x%04X, value: 0x%04X", address, value);
300
301 return err ? -1 : 0;
302}
303
304
305
306static void zc0301_urb_complete(struct urb *urb)
307{
308 struct zc0301_device* cam = urb->context;
309 struct zc0301_frame_t** f;
310 size_t imagesize;
311 u8 i;
312 int err = 0;
313
314 if (urb->status == -ENOENT)
315 return;
316
317 f = &cam->frame_current;
318
319 if (cam->stream == STREAM_INTERRUPT) {
320 cam->stream = STREAM_OFF;
321 if ((*f))
322 (*f)->state = F_QUEUED;
323 DBG(3, "Stream interrupted");
324 wake_up(&cam->wait_stream);
325 }
326
327 if (cam->state & DEV_DISCONNECTED)
328 return;
329
330 if (cam->state & DEV_MISCONFIGURED) {
331 wake_up_interruptible(&cam->wait_frame);
332 return;
333 }
334
335 if (cam->stream == STREAM_OFF || list_empty(&cam->inqueue))
336 goto resubmit_urb;
337
338 if (!(*f))
339 (*f) = list_entry(cam->inqueue.next, struct zc0301_frame_t,
340 frame);
341
342 imagesize = (cam->sensor.pix_format.width *
343 cam->sensor.pix_format.height *
344 cam->sensor.pix_format.priv) / 8;
345
346 for (i = 0; i < urb->number_of_packets; i++) {
347 unsigned int len, status;
348 void *pos;
349 u16* soi;
350 u8 sof;
351
352 len = urb->iso_frame_desc[i].actual_length;
353 status = urb->iso_frame_desc[i].status;
354 pos = urb->iso_frame_desc[i].offset + urb->transfer_buffer;
355
356 if (status) {
357 DBG(3, "Error in isochronous frame");
358 (*f)->state = F_ERROR;
359 continue;
360 }
361
362 sof = (*(soi = pos) == 0xd8ff);
363
364 PDBGG("Isochrnous frame: length %u, #%u i,", len, i);
365
366 if ((*f)->state == F_QUEUED || (*f)->state == F_ERROR)
367start_of_frame:
368 if (sof) {
369 (*f)->state = F_GRABBING;
370 (*f)->buf.bytesused = 0;
371 do_gettimeofday(&(*f)->buf.timestamp);
372 DBG(3, "SOF detected: new video frame");
373 }
374
375 if ((*f)->state == F_GRABBING) {
376 if (sof && (*f)->buf.bytesused)
377 goto end_of_frame;
378
379 if ((*f)->buf.bytesused + len > imagesize) {
380 DBG(3, "Video frame size exceeded");
381 (*f)->state = F_ERROR;
382 continue;
383 }
384
385 memcpy((*f)->bufmem+(*f)->buf.bytesused, pos, len);
386 (*f)->buf.bytesused += len;
387
388 if ((*f)->buf.bytesused == imagesize) {
389 u32 b;
390end_of_frame:
391 b = (*f)->buf.bytesused;
392 (*f)->state = F_DONE;
393 (*f)->buf.sequence= ++cam->frame_count;
394 spin_lock(&cam->queue_lock);
395 list_move_tail(&(*f)->frame, &cam->outqueue);
396 if (!list_empty(&cam->inqueue))
397 (*f) = list_entry(cam->inqueue.next,
398 struct zc0301_frame_t,
399 frame);
400 else
401 (*f) = NULL;
402 spin_unlock(&cam->queue_lock);
403 DBG(3, "Video frame captured: : %lu bytes",
404 (unsigned long)(b));
405
406 if (!(*f))
407 goto resubmit_urb;
408
409 if (sof)
410 goto start_of_frame;
411 }
412 }
413 }
414
415resubmit_urb:
416 urb->dev = cam->usbdev;
417 err = usb_submit_urb(urb, GFP_ATOMIC);
418 if (err < 0 && err != -EPERM) {
419 cam->state |= DEV_MISCONFIGURED;
420 DBG(1, "usb_submit_urb() failed");
421 }
422
423 wake_up_interruptible(&cam->wait_frame);
424}
425
426
427static int zc0301_start_transfer(struct zc0301_device* cam)
428{
429 struct usb_device *udev = cam->usbdev;
430 struct usb_host_interface* altsetting = usb_altnum_to_altsetting(
431 usb_ifnum_to_if(udev, 0),
432 ZC0301_ALTERNATE_SETTING);
433 const unsigned int psz = le16_to_cpu(altsetting->
434 endpoint[0].desc.wMaxPacketSize);
435 struct urb* urb;
436 s8 i, j;
437 int err = 0;
438
439 for (i = 0; i < ZC0301_URBS; i++) {
440 cam->transfer_buffer[i] = kzalloc(ZC0301_ISO_PACKETS * psz,
441 GFP_KERNEL);
442 if (!cam->transfer_buffer[i]) {
443 err = -ENOMEM;
444 DBG(1, "Not enough memory");
445 goto free_buffers;
446 }
447 }
448
449 for (i = 0; i < ZC0301_URBS; i++) {
450 urb = usb_alloc_urb(ZC0301_ISO_PACKETS, GFP_KERNEL);
451 cam->urb[i] = urb;
452 if (!urb) {
453 err = -ENOMEM;
454 DBG(1, "usb_alloc_urb() failed");
455 goto free_urbs;
456 }
457 urb->dev = udev;
458 urb->context = cam;
459 urb->pipe = usb_rcvisocpipe(udev, 1);
460 urb->transfer_flags = URB_ISO_ASAP;
461 urb->number_of_packets = ZC0301_ISO_PACKETS;
462 urb->complete = zc0301_urb_complete;
463 urb->transfer_buffer = cam->transfer_buffer[i];
464 urb->transfer_buffer_length = psz * ZC0301_ISO_PACKETS;
465 urb->interval = 1;
466 for (j = 0; j < ZC0301_ISO_PACKETS; j++) {
467 urb->iso_frame_desc[j].offset = psz * j;
468 urb->iso_frame_desc[j].length = psz;
469 }
470 }
471
472 err = usb_set_interface(udev, 0, ZC0301_ALTERNATE_SETTING);
473 if (err) {
474 DBG(1, "usb_set_interface() failed");
475 goto free_urbs;
476 }
477
478 cam->frame_current = NULL;
479
480 for (i = 0; i < ZC0301_URBS; i++) {
481 err = usb_submit_urb(cam->urb[i], GFP_KERNEL);
482 if (err) {
483 for (j = i-1; j >= 0; j--)
484 usb_kill_urb(cam->urb[j]);
485 DBG(1, "usb_submit_urb() failed, error %d", err);
486 goto free_urbs;
487 }
488 }
489
490 return 0;
491
492free_urbs:
493 for (i = 0; (i < ZC0301_URBS) && cam->urb[i]; i++)
494 usb_free_urb(cam->urb[i]);
495
496free_buffers:
497 for (i = 0; (i < ZC0301_URBS) && cam->transfer_buffer[i]; i++)
498 kfree(cam->transfer_buffer[i]);
499
500 return err;
501}
502
503
504static int zc0301_stop_transfer(struct zc0301_device* cam)
505{
506 struct usb_device *udev = cam->usbdev;
507 s8 i;
508 int err = 0;
509
510 if (cam->state & DEV_DISCONNECTED)
511 return 0;
512
513 for (i = ZC0301_URBS-1; i >= 0; i--) {
514 usb_kill_urb(cam->urb[i]);
515 usb_free_urb(cam->urb[i]);
516 kfree(cam->transfer_buffer[i]);
517 }
518
519 err = usb_set_interface(udev, 0, 0);
520 if (err)
521 DBG(3, "usb_set_interface() failed");
522
523 return err;
524}
525
526
527static int zc0301_stream_interrupt(struct zc0301_device* cam)
528{
529 long timeout;
530
531 cam->stream = STREAM_INTERRUPT;
532 timeout = wait_event_timeout(cam->wait_stream,
533 (cam->stream == STREAM_OFF) ||
534 (cam->state & DEV_DISCONNECTED),
535 ZC0301_URB_TIMEOUT);
536 if (cam->state & DEV_DISCONNECTED)
537 return -ENODEV;
538 else if (cam->stream != STREAM_OFF) {
539 cam->state |= DEV_MISCONFIGURED;
540 DBG(1, "URB timeout reached. The camera is misconfigured. To "
541 "use it, close and open %s again.",
542 video_device_node_name(cam->v4ldev));
543 return -EIO;
544 }
545
546 return 0;
547}
548
549
550
551static int
552zc0301_set_compression(struct zc0301_device* cam,
553 struct v4l2_jpegcompression* compression)
554{
555 int r, err = 0;
556
557 if ((r = zc0301_read_reg(cam, 0x0008)) < 0)
558 err += r;
559 err += zc0301_write_reg(cam, 0x0008, r | 0x11 | compression->quality);
560
561 return err ? -EIO : 0;
562}
563
564
565static int zc0301_init(struct zc0301_device* cam)
566{
567 struct zc0301_sensor* s = &cam->sensor;
568 struct v4l2_control ctrl;
569 struct v4l2_queryctrl *qctrl;
570 struct v4l2_rect* rect;
571 u8 i = 0;
572 int err = 0;
573
574 if (!(cam->state & DEV_INITIALIZED)) {
575 mutex_init(&cam->open_mutex);
576 init_waitqueue_head(&cam->wait_open);
577 qctrl = s->qctrl;
578 rect = &(s->cropcap.defrect);
579 cam->compression.quality = ZC0301_COMPRESSION_QUALITY;
580 } else {
581 qctrl = s->_qctrl;
582 rect = &(s->_rect);
583 }
584
585 if (s->init) {
586 err = s->init(cam);
587 if (err) {
588 DBG(3, "Sensor initialization failed");
589 return err;
590 }
591 }
592
593 if ((err = zc0301_set_compression(cam, &cam->compression))) {
594 DBG(3, "set_compression() failed");
595 return err;
596 }
597
598 if (s->set_crop)
599 if ((err = s->set_crop(cam, rect))) {
600 DBG(3, "set_crop() failed");
601 return err;
602 }
603
604 if (s->set_ctrl) {
605 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
606 if (s->qctrl[i].id != 0 &&
607 !(s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)) {
608 ctrl.id = s->qctrl[i].id;
609 ctrl.value = qctrl[i].default_value;
610 err = s->set_ctrl(cam, &ctrl);
611 if (err) {
612 DBG(3, "Set %s control failed",
613 s->qctrl[i].name);
614 return err;
615 }
616 DBG(3, "Image sensor supports '%s' control",
617 s->qctrl[i].name);
618 }
619 }
620
621 if (!(cam->state & DEV_INITIALIZED)) {
622 mutex_init(&cam->fileop_mutex);
623 spin_lock_init(&cam->queue_lock);
624 init_waitqueue_head(&cam->wait_frame);
625 init_waitqueue_head(&cam->wait_stream);
626 cam->nreadbuffers = 2;
627 memcpy(s->_qctrl, s->qctrl, sizeof(s->qctrl));
628 memcpy(&(s->_rect), &(s->cropcap.defrect),
629 sizeof(struct v4l2_rect));
630 cam->state |= DEV_INITIALIZED;
631 }
632
633 DBG(2, "Initialization succeeded");
634 return 0;
635}
636
637
638
639static void zc0301_release_resources(struct kref *kref)
640{
641 struct zc0301_device *cam = container_of(kref, struct zc0301_device,
642 kref);
643 DBG(2, "V4L2 device %s deregistered",
644 video_device_node_name(cam->v4ldev));
645 video_set_drvdata(cam->v4ldev, NULL);
646 video_unregister_device(cam->v4ldev);
647 usb_put_dev(cam->usbdev);
648 kfree(cam->control_buffer);
649 kfree(cam);
650}
651
652
653static int zc0301_open(struct file *filp)
654{
655 struct zc0301_device* cam;
656 int err = 0;
657
658 if (!down_read_trylock(&zc0301_dev_lock))
659 return -EAGAIN;
660
661 cam = video_drvdata(filp);
662
663 if (wait_for_completion_interruptible(&cam->probe)) {
664 up_read(&zc0301_dev_lock);
665 return -ERESTARTSYS;
666 }
667
668 kref_get(&cam->kref);
669
670 if (mutex_lock_interruptible(&cam->open_mutex)) {
671 kref_put(&cam->kref, zc0301_release_resources);
672 up_read(&zc0301_dev_lock);
673 return -ERESTARTSYS;
674 }
675
676 if (cam->state & DEV_DISCONNECTED) {
677 DBG(1, "Device not present");
678 err = -ENODEV;
679 goto out;
680 }
681
682 if (cam->users) {
683 DBG(2, "Device %s is busy...",
684 video_device_node_name(cam->v4ldev));
685 DBG(3, "Simultaneous opens are not supported");
686 if ((filp->f_flags & O_NONBLOCK) ||
687 (filp->f_flags & O_NDELAY)) {
688 err = -EWOULDBLOCK;
689 goto out;
690 }
691 DBG(2, "A blocking open() has been requested. Wait for the "
692 "device to be released...");
693 up_read(&zc0301_dev_lock);
694 err = wait_event_interruptible_exclusive(cam->wait_open,
695 (cam->state & DEV_DISCONNECTED)
696 || !cam->users);
697 down_read(&zc0301_dev_lock);
698 if (err)
699 goto out;
700 if (cam->state & DEV_DISCONNECTED) {
701 err = -ENODEV;
702 goto out;
703 }
704 }
705
706 if (cam->state & DEV_MISCONFIGURED) {
707 err = zc0301_init(cam);
708 if (err) {
709 DBG(1, "Initialization failed again. "
710 "I will retry on next open().");
711 goto out;
712 }
713 cam->state &= ~DEV_MISCONFIGURED;
714 }
715
716 if ((err = zc0301_start_transfer(cam)))
717 goto out;
718
719 filp->private_data = cam;
720 cam->users++;
721 cam->io = IO_NONE;
722 cam->stream = STREAM_OFF;
723 cam->nbuffers = 0;
724 cam->frame_count = 0;
725 zc0301_empty_framequeues(cam);
726
727 DBG(3, "Video device %s is open",
728 video_device_node_name(cam->v4ldev));
729
730out:
731 mutex_unlock(&cam->open_mutex);
732 if (err)
733 kref_put(&cam->kref, zc0301_release_resources);
734 up_read(&zc0301_dev_lock);
735 return err;
736}
737
738
739static int zc0301_release(struct file *filp)
740{
741 struct zc0301_device* cam;
742
743 down_write(&zc0301_dev_lock);
744
745 cam = video_drvdata(filp);
746
747 zc0301_stop_transfer(cam);
748 zc0301_release_buffers(cam);
749 cam->users--;
750 wake_up_interruptible_nr(&cam->wait_open, 1);
751
752 DBG(3, "Video device %s closed",
753 video_device_node_name(cam->v4ldev));
754
755 kref_put(&cam->kref, zc0301_release_resources);
756
757 up_write(&zc0301_dev_lock);
758
759 return 0;
760}
761
762
763static ssize_t
764zc0301_read(struct file* filp, char __user * buf, size_t count, loff_t* f_pos)
765{
766 struct zc0301_device *cam = video_drvdata(filp);
767 struct zc0301_frame_t* f, * i;
768 unsigned long lock_flags;
769 long timeout;
770 int err = 0;
771
772 if (mutex_lock_interruptible(&cam->fileop_mutex))
773 return -ERESTARTSYS;
774
775 if (cam->state & DEV_DISCONNECTED) {
776 DBG(1, "Device not present");
777 mutex_unlock(&cam->fileop_mutex);
778 return -ENODEV;
779 }
780
781 if (cam->state & DEV_MISCONFIGURED) {
782 DBG(1, "The camera is misconfigured. Close and open it "
783 "again.");
784 mutex_unlock(&cam->fileop_mutex);
785 return -EIO;
786 }
787
788 if (cam->io == IO_MMAP) {
789 DBG(3, "Close and open the device again to choose the read "
790 "method");
791 mutex_unlock(&cam->fileop_mutex);
792 return -EBUSY;
793 }
794
795 if (cam->io == IO_NONE) {
796 if (!zc0301_request_buffers(cam, cam->nreadbuffers, IO_READ)) {
797 DBG(1, "read() failed, not enough memory");
798 mutex_unlock(&cam->fileop_mutex);
799 return -ENOMEM;
800 }
801 cam->io = IO_READ;
802 cam->stream = STREAM_ON;
803 }
804
805 if (list_empty(&cam->inqueue)) {
806 if (!list_empty(&cam->outqueue))
807 zc0301_empty_framequeues(cam);
808 zc0301_queue_unusedframes(cam);
809 }
810
811 if (!count) {
812 mutex_unlock(&cam->fileop_mutex);
813 return 0;
814 }
815
816 if (list_empty(&cam->outqueue)) {
817 if (filp->f_flags & O_NONBLOCK) {
818 mutex_unlock(&cam->fileop_mutex);
819 return -EAGAIN;
820 }
821 timeout = wait_event_interruptible_timeout
822 ( cam->wait_frame,
823 (!list_empty(&cam->outqueue)) ||
824 (cam->state & DEV_DISCONNECTED) ||
825 (cam->state & DEV_MISCONFIGURED),
826 msecs_to_jiffies(
827 cam->module_param.frame_timeout * 1000
828 )
829 );
830 if (timeout < 0) {
831 mutex_unlock(&cam->fileop_mutex);
832 return timeout;
833 }
834 if (cam->state & DEV_DISCONNECTED) {
835 mutex_unlock(&cam->fileop_mutex);
836 return -ENODEV;
837 }
838 if (!timeout || (cam->state & DEV_MISCONFIGURED)) {
839 mutex_unlock(&cam->fileop_mutex);
840 return -EIO;
841 }
842 }
843
844 f = list_entry(cam->outqueue.prev, struct zc0301_frame_t, frame);
845
846 if (count > f->buf.bytesused)
847 count = f->buf.bytesused;
848
849 if (copy_to_user(buf, f->bufmem, count)) {
850 err = -EFAULT;
851 goto exit;
852 }
853 *f_pos += count;
854
855exit:
856 spin_lock_irqsave(&cam->queue_lock, lock_flags);
857 list_for_each_entry(i, &cam->outqueue, frame)
858 i->state = F_UNUSED;
859 INIT_LIST_HEAD(&cam->outqueue);
860 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
861
862 zc0301_queue_unusedframes(cam);
863
864 PDBGG("Frame #%lu, bytes read: %zu",
865 (unsigned long)f->buf.index, count);
866
867 mutex_unlock(&cam->fileop_mutex);
868
869 return err ? err : count;
870}
871
872
873static unsigned int zc0301_poll(struct file *filp, poll_table *wait)
874{
875 struct zc0301_device *cam = video_drvdata(filp);
876 struct zc0301_frame_t* f;
877 unsigned long lock_flags;
878 unsigned int mask = 0;
879
880 if (mutex_lock_interruptible(&cam->fileop_mutex))
881 return POLLERR;
882
883 if (cam->state & DEV_DISCONNECTED) {
884 DBG(1, "Device not present");
885 goto error;
886 }
887
888 if (cam->state & DEV_MISCONFIGURED) {
889 DBG(1, "The camera is misconfigured. Close and open it "
890 "again.");
891 goto error;
892 }
893
894 if (cam->io == IO_NONE) {
895 if (!zc0301_request_buffers(cam, cam->nreadbuffers, IO_READ)) {
896 DBG(1, "poll() failed, not enough memory");
897 goto error;
898 }
899 cam->io = IO_READ;
900 cam->stream = STREAM_ON;
901 }
902
903 if (cam->io == IO_READ) {
904 spin_lock_irqsave(&cam->queue_lock, lock_flags);
905 list_for_each_entry(f, &cam->outqueue, frame)
906 f->state = F_UNUSED;
907 INIT_LIST_HEAD(&cam->outqueue);
908 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
909 zc0301_queue_unusedframes(cam);
910 }
911
912 poll_wait(filp, &cam->wait_frame, wait);
913
914 if (!list_empty(&cam->outqueue))
915 mask |= POLLIN | POLLRDNORM;
916
917 mutex_unlock(&cam->fileop_mutex);
918
919 return mask;
920
921error:
922 mutex_unlock(&cam->fileop_mutex);
923 return POLLERR;
924}
925
926
927static void zc0301_vm_open(struct vm_area_struct* vma)
928{
929 struct zc0301_frame_t* f = vma->vm_private_data;
930 f->vma_use_count++;
931}
932
933
934static void zc0301_vm_close(struct vm_area_struct* vma)
935{
936
937 struct zc0301_frame_t* f = vma->vm_private_data;
938 f->vma_use_count--;
939}
940
941
942static const struct vm_operations_struct zc0301_vm_ops = {
943 .open = zc0301_vm_open,
944 .close = zc0301_vm_close,
945};
946
947
948static int zc0301_mmap(struct file* filp, struct vm_area_struct *vma)
949{
950 struct zc0301_device *cam = video_drvdata(filp);
951 unsigned long size = vma->vm_end - vma->vm_start,
952 start = vma->vm_start;
953 void *pos;
954 u32 i;
955
956 if (mutex_lock_interruptible(&cam->fileop_mutex))
957 return -ERESTARTSYS;
958
959 if (cam->state & DEV_DISCONNECTED) {
960 DBG(1, "Device not present");
961 mutex_unlock(&cam->fileop_mutex);
962 return -ENODEV;
963 }
964
965 if (cam->state & DEV_MISCONFIGURED) {
966 DBG(1, "The camera is misconfigured. Close and open it "
967 "again.");
968 mutex_unlock(&cam->fileop_mutex);
969 return -EIO;
970 }
971
972 if (!(vma->vm_flags & (VM_WRITE | VM_READ))) {
973 mutex_unlock(&cam->fileop_mutex);
974 return -EACCES;
975 }
976
977 if (cam->io != IO_MMAP ||
978 size != PAGE_ALIGN(cam->frame[0].buf.length)) {
979 mutex_unlock(&cam->fileop_mutex);
980 return -EINVAL;
981 }
982
983 for (i = 0; i < cam->nbuffers; i++) {
984 if ((cam->frame[i].buf.m.offset>>PAGE_SHIFT) == vma->vm_pgoff)
985 break;
986 }
987 if (i == cam->nbuffers) {
988 mutex_unlock(&cam->fileop_mutex);
989 return -EINVAL;
990 }
991
992 vma->vm_flags |= VM_IO;
993 vma->vm_flags |= VM_RESERVED;
994
995 pos = cam->frame[i].bufmem;
996 while (size > 0) {
997 if (vm_insert_page(vma, start, vmalloc_to_page(pos))) {
998 mutex_unlock(&cam->fileop_mutex);
999 return -EAGAIN;
1000 }
1001 start += PAGE_SIZE;
1002 pos += PAGE_SIZE;
1003 size -= PAGE_SIZE;
1004 }
1005
1006 vma->vm_ops = &zc0301_vm_ops;
1007 vma->vm_private_data = &cam->frame[i];
1008 zc0301_vm_open(vma);
1009
1010 mutex_unlock(&cam->fileop_mutex);
1011
1012 return 0;
1013}
1014
1015
1016
1017static int
1018zc0301_vidioc_querycap(struct zc0301_device* cam, void __user * arg)
1019{
1020 struct v4l2_capability cap = {
1021 .driver = "zc0301",
1022 .version = ZC0301_MODULE_VERSION_CODE,
1023 .capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
1024 V4L2_CAP_STREAMING,
1025 };
1026
1027 strlcpy(cap.card, cam->v4ldev->name, sizeof(cap.card));
1028 if (usb_make_path(cam->usbdev, cap.bus_info, sizeof(cap.bus_info)) < 0)
1029 strlcpy(cap.bus_info, dev_name(&cam->usbdev->dev),
1030 sizeof(cap.bus_info));
1031
1032 if (copy_to_user(arg, &cap, sizeof(cap)))
1033 return -EFAULT;
1034
1035 return 0;
1036}
1037
1038
1039static int
1040zc0301_vidioc_enuminput(struct zc0301_device* cam, void __user * arg)
1041{
1042 struct v4l2_input i;
1043
1044 if (copy_from_user(&i, arg, sizeof(i)))
1045 return -EFAULT;
1046
1047 if (i.index)
1048 return -EINVAL;
1049
1050 memset(&i, 0, sizeof(i));
1051 strcpy(i.name, "Camera");
1052 i.type = V4L2_INPUT_TYPE_CAMERA;
1053
1054 if (copy_to_user(arg, &i, sizeof(i)))
1055 return -EFAULT;
1056
1057 return 0;
1058}
1059
1060
1061static int
1062zc0301_vidioc_g_input(struct zc0301_device* cam, void __user * arg)
1063{
1064 int index = 0;
1065
1066 if (copy_to_user(arg, &index, sizeof(index)))
1067 return -EFAULT;
1068
1069 return 0;
1070}
1071
1072
1073static int
1074zc0301_vidioc_s_input(struct zc0301_device* cam, void __user * arg)
1075{
1076 int index;
1077
1078 if (copy_from_user(&index, arg, sizeof(index)))
1079 return -EFAULT;
1080
1081 if (index != 0)
1082 return -EINVAL;
1083
1084 return 0;
1085}
1086
1087
1088static int
1089zc0301_vidioc_query_ctrl(struct zc0301_device* cam, void __user * arg)
1090{
1091 struct zc0301_sensor* s = &cam->sensor;
1092 struct v4l2_queryctrl qc;
1093 u8 i;
1094
1095 if (copy_from_user(&qc, arg, sizeof(qc)))
1096 return -EFAULT;
1097
1098 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1099 if (qc.id && qc.id == s->qctrl[i].id) {
1100 memcpy(&qc, &(s->qctrl[i]), sizeof(qc));
1101 if (copy_to_user(arg, &qc, sizeof(qc)))
1102 return -EFAULT;
1103 return 0;
1104 }
1105
1106 return -EINVAL;
1107}
1108
1109
1110static int
1111zc0301_vidioc_g_ctrl(struct zc0301_device* cam, void __user * arg)
1112{
1113 struct zc0301_sensor* s = &cam->sensor;
1114 struct v4l2_control ctrl;
1115 int err = 0;
1116 u8 i;
1117
1118 if (!s->get_ctrl && !s->set_ctrl)
1119 return -EINVAL;
1120
1121 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1122 return -EFAULT;
1123
1124 if (!s->get_ctrl) {
1125 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++)
1126 if (ctrl.id == s->qctrl[i].id) {
1127 ctrl.value = s->_qctrl[i].default_value;
1128 goto exit;
1129 }
1130 return -EINVAL;
1131 } else
1132 err = s->get_ctrl(cam, &ctrl);
1133
1134exit:
1135 if (copy_to_user(arg, &ctrl, sizeof(ctrl)))
1136 return -EFAULT;
1137
1138 return err;
1139}
1140
1141
1142static int
1143zc0301_vidioc_s_ctrl(struct zc0301_device* cam, void __user * arg)
1144{
1145 struct zc0301_sensor* s = &cam->sensor;
1146 struct v4l2_control ctrl;
1147 u8 i;
1148 int err = 0;
1149
1150 if (!s->set_ctrl)
1151 return -EINVAL;
1152
1153 if (copy_from_user(&ctrl, arg, sizeof(ctrl)))
1154 return -EFAULT;
1155
1156 for (i = 0; i < ARRAY_SIZE(s->qctrl); i++) {
1157 if (ctrl.id == s->qctrl[i].id) {
1158 if (s->qctrl[i].flags & V4L2_CTRL_FLAG_DISABLED)
1159 return -EINVAL;
1160 if (ctrl.value < s->qctrl[i].minimum ||
1161 ctrl.value > s->qctrl[i].maximum)
1162 return -ERANGE;
1163 ctrl.value -= ctrl.value % s->qctrl[i].step;
1164 break;
1165 }
1166 }
1167 if (i == ARRAY_SIZE(s->qctrl))
1168 return -EINVAL;
1169 if ((err = s->set_ctrl(cam, &ctrl)))
1170 return err;
1171
1172 s->_qctrl[i].default_value = ctrl.value;
1173
1174 return 0;
1175}
1176
1177
1178static int
1179zc0301_vidioc_cropcap(struct zc0301_device* cam, void __user * arg)
1180{
1181 struct v4l2_cropcap* cc = &(cam->sensor.cropcap);
1182
1183 cc->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1184 cc->pixelaspect.numerator = 1;
1185 cc->pixelaspect.denominator = 1;
1186
1187 if (copy_to_user(arg, cc, sizeof(*cc)))
1188 return -EFAULT;
1189
1190 return 0;
1191}
1192
1193
1194static int
1195zc0301_vidioc_g_crop(struct zc0301_device* cam, void __user * arg)
1196{
1197 struct zc0301_sensor* s = &cam->sensor;
1198 struct v4l2_crop crop = {
1199 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1200 };
1201
1202 memcpy(&(crop.c), &(s->_rect), sizeof(struct v4l2_rect));
1203
1204 if (copy_to_user(arg, &crop, sizeof(crop)))
1205 return -EFAULT;
1206
1207 return 0;
1208}
1209
1210
1211static int
1212zc0301_vidioc_s_crop(struct zc0301_device* cam, void __user * arg)
1213{
1214 struct zc0301_sensor* s = &cam->sensor;
1215 struct v4l2_crop crop;
1216 struct v4l2_rect* rect;
1217 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1218 const enum zc0301_stream_state stream = cam->stream;
1219 const u32 nbuffers = cam->nbuffers;
1220 u32 i;
1221 int err = 0;
1222
1223 if (copy_from_user(&crop, arg, sizeof(crop)))
1224 return -EFAULT;
1225
1226 rect = &(crop.c);
1227
1228 if (crop.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1229 return -EINVAL;
1230
1231 if (cam->module_param.force_munmap)
1232 for (i = 0; i < cam->nbuffers; i++)
1233 if (cam->frame[i].vma_use_count) {
1234 DBG(3, "VIDIOC_S_CROP failed. "
1235 "Unmap the buffers first.");
1236 return -EBUSY;
1237 }
1238
1239 if (!s->set_crop) {
1240 memcpy(rect, &(s->_rect), sizeof(*rect));
1241 if (copy_to_user(arg, &crop, sizeof(crop)))
1242 return -EFAULT;
1243 return 0;
1244 }
1245
1246 rect->left &= ~7L;
1247 rect->top &= ~7L;
1248 if (rect->width < 8)
1249 rect->width = 8;
1250 if (rect->height < 8)
1251 rect->height = 8;
1252 if (rect->width > bounds->width)
1253 rect->width = bounds->width;
1254 if (rect->height > bounds->height)
1255 rect->height = bounds->height;
1256 if (rect->left < bounds->left)
1257 rect->left = bounds->left;
1258 if (rect->top < bounds->top)
1259 rect->top = bounds->top;
1260 if (rect->left + rect->width > bounds->left + bounds->width)
1261 rect->left = bounds->left+bounds->width - rect->width;
1262 if (rect->top + rect->height > bounds->top + bounds->height)
1263 rect->top = bounds->top+bounds->height - rect->height;
1264 rect->width &= ~7L;
1265 rect->height &= ~7L;
1266
1267 if (cam->stream == STREAM_ON)
1268 if ((err = zc0301_stream_interrupt(cam)))
1269 return err;
1270
1271 if (copy_to_user(arg, &crop, sizeof(crop))) {
1272 cam->stream = stream;
1273 return -EFAULT;
1274 }
1275
1276 if (cam->module_param.force_munmap || cam->io == IO_READ)
1277 zc0301_release_buffers(cam);
1278
1279 if (s->set_crop)
1280 err += s->set_crop(cam, rect);
1281
1282 if (err) {
1283 cam->state |= DEV_MISCONFIGURED;
1284 DBG(1, "VIDIOC_S_CROP failed because of hardware problems. To "
1285 "use the camera, close and open %s again.",
1286 video_device_node_name(cam->v4ldev));
1287 return -EIO;
1288 }
1289
1290 s->pix_format.width = rect->width;
1291 s->pix_format.height = rect->height;
1292 memcpy(&(s->_rect), rect, sizeof(*rect));
1293
1294 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1295 nbuffers != zc0301_request_buffers(cam, nbuffers, cam->io)) {
1296 cam->state |= DEV_MISCONFIGURED;
1297 DBG(1, "VIDIOC_S_CROP failed because of not enough memory. To "
1298 "use the camera, close and open %s again.",
1299 video_device_node_name(cam->v4ldev));
1300 return -ENOMEM;
1301 }
1302
1303 if (cam->io == IO_READ)
1304 zc0301_empty_framequeues(cam);
1305 else if (cam->module_param.force_munmap)
1306 zc0301_requeue_outqueue(cam);
1307
1308 cam->stream = stream;
1309
1310 return 0;
1311}
1312
1313
1314static int
1315zc0301_vidioc_enum_framesizes(struct zc0301_device* cam, void __user * arg)
1316{
1317 struct v4l2_frmsizeenum frmsize;
1318
1319 if (copy_from_user(&frmsize, arg, sizeof(frmsize)))
1320 return -EFAULT;
1321
1322 if (frmsize.index != 0 && frmsize.index != 1)
1323 return -EINVAL;
1324
1325 if (frmsize.pixel_format != V4L2_PIX_FMT_JPEG)
1326 return -EINVAL;
1327
1328 frmsize.type = V4L2_FRMSIZE_TYPE_DISCRETE;
1329
1330 if (frmsize.index == 1) {
1331 frmsize.discrete.width = cam->sensor.cropcap.defrect.width;
1332 frmsize.discrete.height = cam->sensor.cropcap.defrect.height;
1333 }
1334 memset(&frmsize.reserved, 0, sizeof(frmsize.reserved));
1335
1336 if (copy_to_user(arg, &frmsize, sizeof(frmsize)))
1337 return -EFAULT;
1338
1339 return 0;
1340}
1341
1342
1343static int
1344zc0301_vidioc_enum_fmt(struct zc0301_device* cam, void __user * arg)
1345{
1346 struct v4l2_fmtdesc fmtd;
1347
1348 if (copy_from_user(&fmtd, arg, sizeof(fmtd)))
1349 return -EFAULT;
1350
1351 if (fmtd.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1352 return -EINVAL;
1353
1354 if (fmtd.index == 0) {
1355 strcpy(fmtd.description, "JPEG");
1356 fmtd.pixelformat = V4L2_PIX_FMT_JPEG;
1357 fmtd.flags = V4L2_FMT_FLAG_COMPRESSED;
1358 } else
1359 return -EINVAL;
1360
1361 fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1362 memset(&fmtd.reserved, 0, sizeof(fmtd.reserved));
1363
1364 if (copy_to_user(arg, &fmtd, sizeof(fmtd)))
1365 return -EFAULT;
1366
1367 return 0;
1368}
1369
1370
1371static int
1372zc0301_vidioc_g_fmt(struct zc0301_device* cam, void __user * arg)
1373{
1374 struct v4l2_format format;
1375 struct v4l2_pix_format* pfmt = &(cam->sensor.pix_format);
1376
1377 if (copy_from_user(&format, arg, sizeof(format)))
1378 return -EFAULT;
1379
1380 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1381 return -EINVAL;
1382
1383 pfmt->bytesperline = 0;
1384 pfmt->sizeimage = pfmt->height * ((pfmt->width*pfmt->priv)/8);
1385 pfmt->field = V4L2_FIELD_NONE;
1386 memcpy(&(format.fmt.pix), pfmt, sizeof(*pfmt));
1387
1388 if (copy_to_user(arg, &format, sizeof(format)))
1389 return -EFAULT;
1390
1391 return 0;
1392}
1393
1394
1395static int
1396zc0301_vidioc_try_s_fmt(struct zc0301_device* cam, unsigned int cmd,
1397 void __user * arg)
1398{
1399 struct zc0301_sensor* s = &cam->sensor;
1400 struct v4l2_format format;
1401 struct v4l2_pix_format* pix;
1402 struct v4l2_pix_format* pfmt = &(s->pix_format);
1403 struct v4l2_rect* bounds = &(s->cropcap.bounds);
1404 struct v4l2_rect rect;
1405 const enum zc0301_stream_state stream = cam->stream;
1406 const u32 nbuffers = cam->nbuffers;
1407 u32 i;
1408 int err = 0;
1409
1410 if (copy_from_user(&format, arg, sizeof(format)))
1411 return -EFAULT;
1412
1413 pix = &(format.fmt.pix);
1414
1415 if (format.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1416 return -EINVAL;
1417
1418 memcpy(&rect, &(s->_rect), sizeof(rect));
1419
1420 if (!s->set_crop) {
1421 pix->width = rect.width;
1422 pix->height = rect.height;
1423 } else {
1424 rect.width = pix->width;
1425 rect.height = pix->height;
1426 }
1427
1428 if (rect.width < 8)
1429 rect.width = 8;
1430 if (rect.height < 8)
1431 rect.height = 8;
1432 if (rect.width > bounds->left + bounds->width - rect.left)
1433 rect.width = bounds->left + bounds->width - rect.left;
1434 if (rect.height > bounds->top + bounds->height - rect.top)
1435 rect.height = bounds->top + bounds->height - rect.top;
1436 rect.width &= ~7L;
1437 rect.height &= ~7L;
1438
1439 pix->width = rect.width;
1440 pix->height = rect.height;
1441 pix->pixelformat = pfmt->pixelformat;
1442 pix->priv = pfmt->priv;
1443 pix->colorspace = pfmt->colorspace;
1444 pix->bytesperline = 0;
1445 pix->sizeimage = pix->height * ((pix->width * pix->priv) / 8);
1446 pix->field = V4L2_FIELD_NONE;
1447
1448 if (cmd == VIDIOC_TRY_FMT) {
1449 if (copy_to_user(arg, &format, sizeof(format)))
1450 return -EFAULT;
1451 return 0;
1452 }
1453
1454 if (cam->module_param.force_munmap)
1455 for (i = 0; i < cam->nbuffers; i++)
1456 if (cam->frame[i].vma_use_count) {
1457 DBG(3, "VIDIOC_S_FMT failed. "
1458 "Unmap the buffers first.");
1459 return -EBUSY;
1460 }
1461
1462 if (cam->stream == STREAM_ON)
1463 if ((err = zc0301_stream_interrupt(cam)))
1464 return err;
1465
1466 if (copy_to_user(arg, &format, sizeof(format))) {
1467 cam->stream = stream;
1468 return -EFAULT;
1469 }
1470
1471 if (cam->module_param.force_munmap || cam->io == IO_READ)
1472 zc0301_release_buffers(cam);
1473
1474 if (s->set_crop)
1475 err += s->set_crop(cam, &rect);
1476
1477 if (err) {
1478 cam->state |= DEV_MISCONFIGURED;
1479 DBG(1, "VIDIOC_S_FMT failed because of hardware problems. To "
1480 "use the camera, close and open %s again.",
1481 video_device_node_name(cam->v4ldev));
1482 return -EIO;
1483 }
1484
1485 memcpy(pfmt, pix, sizeof(*pix));
1486 memcpy(&(s->_rect), &rect, sizeof(rect));
1487
1488 if ((cam->module_param.force_munmap || cam->io == IO_READ) &&
1489 nbuffers != zc0301_request_buffers(cam, nbuffers, cam->io)) {
1490 cam->state |= DEV_MISCONFIGURED;
1491 DBG(1, "VIDIOC_S_FMT failed because of not enough memory. To "
1492 "use the camera, close and open %s again.",
1493 video_device_node_name(cam->v4ldev));
1494 return -ENOMEM;
1495 }
1496
1497 if (cam->io == IO_READ)
1498 zc0301_empty_framequeues(cam);
1499 else if (cam->module_param.force_munmap)
1500 zc0301_requeue_outqueue(cam);
1501
1502 cam->stream = stream;
1503
1504 return 0;
1505}
1506
1507
1508static int
1509zc0301_vidioc_g_jpegcomp(struct zc0301_device* cam, void __user * arg)
1510{
1511 if (copy_to_user(arg, &cam->compression, sizeof(cam->compression)))
1512 return -EFAULT;
1513
1514 return 0;
1515}
1516
1517
1518static int
1519zc0301_vidioc_s_jpegcomp(struct zc0301_device* cam, void __user * arg)
1520{
1521 struct v4l2_jpegcompression jc;
1522 const enum zc0301_stream_state stream = cam->stream;
1523 int err = 0;
1524
1525 if (copy_from_user(&jc, arg, sizeof(jc)))
1526 return -EFAULT;
1527
1528 if (jc.quality != 0)
1529 return -EINVAL;
1530
1531 if (cam->stream == STREAM_ON)
1532 if ((err = zc0301_stream_interrupt(cam)))
1533 return err;
1534
1535 err += zc0301_set_compression(cam, &jc);
1536 if (err) {
1537 cam->state |= DEV_MISCONFIGURED;
1538 DBG(1, "VIDIOC_S_JPEGCOMP failed because of hardware "
1539 "problems. To use the camera, close and open %s again.",
1540 video_device_node_name(cam->v4ldev));
1541 return -EIO;
1542 }
1543
1544 cam->compression.quality = jc.quality;
1545
1546 cam->stream = stream;
1547
1548 return 0;
1549}
1550
1551
1552static int
1553zc0301_vidioc_reqbufs(struct zc0301_device* cam, void __user * arg)
1554{
1555 struct v4l2_requestbuffers rb;
1556 u32 i;
1557 int err;
1558
1559 if (copy_from_user(&rb, arg, sizeof(rb)))
1560 return -EFAULT;
1561
1562 if (rb.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1563 rb.memory != V4L2_MEMORY_MMAP)
1564 return -EINVAL;
1565
1566 if (cam->io == IO_READ) {
1567 DBG(3, "Close and open the device again to choose the mmap "
1568 "I/O method");
1569 return -EBUSY;
1570 }
1571
1572 for (i = 0; i < cam->nbuffers; i++)
1573 if (cam->frame[i].vma_use_count) {
1574 DBG(3, "VIDIOC_REQBUFS failed. "
1575 "Previous buffers are still mapped.");
1576 return -EBUSY;
1577 }
1578
1579 if (cam->stream == STREAM_ON)
1580 if ((err = zc0301_stream_interrupt(cam)))
1581 return err;
1582
1583 zc0301_empty_framequeues(cam);
1584
1585 zc0301_release_buffers(cam);
1586 if (rb.count)
1587 rb.count = zc0301_request_buffers(cam, rb.count, IO_MMAP);
1588
1589 if (copy_to_user(arg, &rb, sizeof(rb))) {
1590 zc0301_release_buffers(cam);
1591 cam->io = IO_NONE;
1592 return -EFAULT;
1593 }
1594
1595 cam->io = rb.count ? IO_MMAP : IO_NONE;
1596
1597 return 0;
1598}
1599
1600
1601static int
1602zc0301_vidioc_querybuf(struct zc0301_device* cam, void __user * arg)
1603{
1604 struct v4l2_buffer b;
1605
1606 if (copy_from_user(&b, arg, sizeof(b)))
1607 return -EFAULT;
1608
1609 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1610 b.index >= cam->nbuffers || cam->io != IO_MMAP)
1611 return -EINVAL;
1612
1613 memcpy(&b, &cam->frame[b.index].buf, sizeof(b));
1614
1615 if (cam->frame[b.index].vma_use_count)
1616 b.flags |= V4L2_BUF_FLAG_MAPPED;
1617
1618 if (cam->frame[b.index].state == F_DONE)
1619 b.flags |= V4L2_BUF_FLAG_DONE;
1620 else if (cam->frame[b.index].state != F_UNUSED)
1621 b.flags |= V4L2_BUF_FLAG_QUEUED;
1622
1623 if (copy_to_user(arg, &b, sizeof(b)))
1624 return -EFAULT;
1625
1626 return 0;
1627}
1628
1629
1630static int
1631zc0301_vidioc_qbuf(struct zc0301_device* cam, void __user * arg)
1632{
1633 struct v4l2_buffer b;
1634 unsigned long lock_flags;
1635
1636 if (copy_from_user(&b, arg, sizeof(b)))
1637 return -EFAULT;
1638
1639 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE ||
1640 b.index >= cam->nbuffers || cam->io != IO_MMAP)
1641 return -EINVAL;
1642
1643 if (cam->frame[b.index].state != F_UNUSED)
1644 return -EINVAL;
1645
1646 cam->frame[b.index].state = F_QUEUED;
1647
1648 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1649 list_add_tail(&cam->frame[b.index].frame, &cam->inqueue);
1650 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1651
1652 PDBGG("Frame #%lu queued", (unsigned long)b.index);
1653
1654 return 0;
1655}
1656
1657
1658static int
1659zc0301_vidioc_dqbuf(struct zc0301_device* cam, struct file* filp,
1660 void __user * arg)
1661{
1662 struct v4l2_buffer b;
1663 struct zc0301_frame_t *f;
1664 unsigned long lock_flags;
1665 long timeout;
1666
1667 if (copy_from_user(&b, arg, sizeof(b)))
1668 return -EFAULT;
1669
1670 if (b.type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io!= IO_MMAP)
1671 return -EINVAL;
1672
1673 if (list_empty(&cam->outqueue)) {
1674 if (cam->stream == STREAM_OFF)
1675 return -EINVAL;
1676 if (filp->f_flags & O_NONBLOCK)
1677 return -EAGAIN;
1678 timeout = wait_event_interruptible_timeout
1679 ( cam->wait_frame,
1680 (!list_empty(&cam->outqueue)) ||
1681 (cam->state & DEV_DISCONNECTED) ||
1682 (cam->state & DEV_MISCONFIGURED),
1683 cam->module_param.frame_timeout *
1684 1000 * msecs_to_jiffies(1) );
1685 if (timeout < 0)
1686 return timeout;
1687 if (cam->state & DEV_DISCONNECTED)
1688 return -ENODEV;
1689 if (!timeout || (cam->state & DEV_MISCONFIGURED))
1690 return -EIO;
1691 }
1692
1693 spin_lock_irqsave(&cam->queue_lock, lock_flags);
1694 f = list_entry(cam->outqueue.next, struct zc0301_frame_t, frame);
1695 list_del(cam->outqueue.next);
1696 spin_unlock_irqrestore(&cam->queue_lock, lock_flags);
1697
1698 f->state = F_UNUSED;
1699
1700 memcpy(&b, &f->buf, sizeof(b));
1701 if (f->vma_use_count)
1702 b.flags |= V4L2_BUF_FLAG_MAPPED;
1703
1704 if (copy_to_user(arg, &b, sizeof(b)))
1705 return -EFAULT;
1706
1707 PDBGG("Frame #%lu dequeued", (unsigned long)f->buf.index);
1708
1709 return 0;
1710}
1711
1712
1713static int
1714zc0301_vidioc_streamon(struct zc0301_device* cam, void __user * arg)
1715{
1716 int type;
1717
1718 if (copy_from_user(&type, arg, sizeof(type)))
1719 return -EFAULT;
1720
1721 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
1722 return -EINVAL;
1723
1724 cam->stream = STREAM_ON;
1725
1726 DBG(3, "Stream on");
1727
1728 return 0;
1729}
1730
1731
1732static int
1733zc0301_vidioc_streamoff(struct zc0301_device* cam, void __user * arg)
1734{
1735 int type, err;
1736
1737 if (copy_from_user(&type, arg, sizeof(type)))
1738 return -EFAULT;
1739
1740 if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE || cam->io != IO_MMAP)
1741 return -EINVAL;
1742
1743 if (cam->stream == STREAM_ON)
1744 if ((err = zc0301_stream_interrupt(cam)))
1745 return err;
1746
1747 zc0301_empty_framequeues(cam);
1748
1749 DBG(3, "Stream off");
1750
1751 return 0;
1752}
1753
1754
1755static int
1756zc0301_vidioc_g_parm(struct zc0301_device* cam, void __user * arg)
1757{
1758 struct v4l2_streamparm sp;
1759
1760 if (copy_from_user(&sp, arg, sizeof(sp)))
1761 return -EFAULT;
1762
1763 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1764 return -EINVAL;
1765
1766 sp.parm.capture.extendedmode = 0;
1767 sp.parm.capture.readbuffers = cam->nreadbuffers;
1768
1769 if (copy_to_user(arg, &sp, sizeof(sp)))
1770 return -EFAULT;
1771
1772 return 0;
1773}
1774
1775
1776static int
1777zc0301_vidioc_s_parm(struct zc0301_device* cam, void __user * arg)
1778{
1779 struct v4l2_streamparm sp;
1780
1781 if (copy_from_user(&sp, arg, sizeof(sp)))
1782 return -EFAULT;
1783
1784 if (sp.type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1785 return -EINVAL;
1786
1787 sp.parm.capture.extendedmode = 0;
1788
1789 if (sp.parm.capture.readbuffers == 0)
1790 sp.parm.capture.readbuffers = cam->nreadbuffers;
1791
1792 if (sp.parm.capture.readbuffers > ZC0301_MAX_FRAMES)
1793 sp.parm.capture.readbuffers = ZC0301_MAX_FRAMES;
1794
1795 if (copy_to_user(arg, &sp, sizeof(sp)))
1796 return -EFAULT;
1797
1798 cam->nreadbuffers = sp.parm.capture.readbuffers;
1799
1800 return 0;
1801}
1802
1803
1804static long zc0301_ioctl_v4l2(struct file *filp,
1805 unsigned int cmd, void __user *arg)
1806{
1807 struct zc0301_device *cam = video_drvdata(filp);
1808
1809 switch (cmd) {
1810
1811 case VIDIOC_QUERYCAP:
1812 return zc0301_vidioc_querycap(cam, arg);
1813
1814 case VIDIOC_ENUMINPUT:
1815 return zc0301_vidioc_enuminput(cam, arg);
1816
1817 case VIDIOC_G_INPUT:
1818 return zc0301_vidioc_g_input(cam, arg);
1819
1820 case VIDIOC_S_INPUT:
1821 return zc0301_vidioc_s_input(cam, arg);
1822
1823 case VIDIOC_QUERYCTRL:
1824 return zc0301_vidioc_query_ctrl(cam, arg);
1825
1826 case VIDIOC_G_CTRL:
1827 return zc0301_vidioc_g_ctrl(cam, arg);
1828
1829 case VIDIOC_S_CTRL:
1830 return zc0301_vidioc_s_ctrl(cam, arg);
1831
1832 case VIDIOC_CROPCAP:
1833 return zc0301_vidioc_cropcap(cam, arg);
1834
1835 case VIDIOC_G_CROP:
1836 return zc0301_vidioc_g_crop(cam, arg);
1837
1838 case VIDIOC_S_CROP:
1839 return zc0301_vidioc_s_crop(cam, arg);
1840
1841 case VIDIOC_ENUM_FMT:
1842 return zc0301_vidioc_enum_fmt(cam, arg);
1843
1844 case VIDIOC_G_FMT:
1845 return zc0301_vidioc_g_fmt(cam, arg);
1846
1847 case VIDIOC_TRY_FMT:
1848 case VIDIOC_S_FMT:
1849 return zc0301_vidioc_try_s_fmt(cam, cmd, arg);
1850
1851 case VIDIOC_ENUM_FRAMESIZES:
1852 return zc0301_vidioc_enum_framesizes(cam, arg);
1853
1854 case VIDIOC_G_JPEGCOMP:
1855 return zc0301_vidioc_g_jpegcomp(cam, arg);
1856
1857 case VIDIOC_S_JPEGCOMP:
1858 return zc0301_vidioc_s_jpegcomp(cam, arg);
1859
1860 case VIDIOC_REQBUFS:
1861 return zc0301_vidioc_reqbufs(cam, arg);
1862
1863 case VIDIOC_QUERYBUF:
1864 return zc0301_vidioc_querybuf(cam, arg);
1865
1866 case VIDIOC_QBUF:
1867 return zc0301_vidioc_qbuf(cam, arg);
1868
1869 case VIDIOC_DQBUF:
1870 return zc0301_vidioc_dqbuf(cam, filp, arg);
1871
1872 case VIDIOC_STREAMON:
1873 return zc0301_vidioc_streamon(cam, arg);
1874
1875 case VIDIOC_STREAMOFF:
1876 return zc0301_vidioc_streamoff(cam, arg);
1877
1878 case VIDIOC_G_PARM:
1879 return zc0301_vidioc_g_parm(cam, arg);
1880
1881 case VIDIOC_S_PARM:
1882 return zc0301_vidioc_s_parm(cam, arg);
1883
1884 case VIDIOC_G_STD:
1885 case VIDIOC_S_STD:
1886 case VIDIOC_QUERYSTD:
1887 case VIDIOC_ENUMSTD:
1888 case VIDIOC_QUERYMENU:
1889 case VIDIOC_ENUM_FRAMEINTERVALS:
1890 return -EINVAL;
1891
1892 default:
1893 return -EINVAL;
1894
1895 }
1896}
1897
1898
1899static long zc0301_ioctl(struct file *filp,
1900 unsigned int cmd, unsigned long arg)
1901{
1902 struct zc0301_device *cam = video_drvdata(filp);
1903 int err = 0;
1904
1905 if (mutex_lock_interruptible(&cam->fileop_mutex))
1906 return -ERESTARTSYS;
1907
1908 if (cam->state & DEV_DISCONNECTED) {
1909 DBG(1, "Device not present");
1910 mutex_unlock(&cam->fileop_mutex);
1911 return -ENODEV;
1912 }
1913
1914 if (cam->state & DEV_MISCONFIGURED) {
1915 DBG(1, "The camera is misconfigured. Close and open it "
1916 "again.");
1917 mutex_unlock(&cam->fileop_mutex);
1918 return -EIO;
1919 }
1920
1921 V4LDBG(3, "zc0301", cmd);
1922
1923 err = zc0301_ioctl_v4l2(filp, cmd, (void __user *)arg);
1924
1925 mutex_unlock(&cam->fileop_mutex);
1926
1927 return err;
1928}
1929
1930
1931static const struct v4l2_file_operations zc0301_fops = {
1932 .owner = THIS_MODULE,
1933 .open = zc0301_open,
1934 .release = zc0301_release,
1935 .ioctl = zc0301_ioctl,
1936 .read = zc0301_read,
1937 .poll = zc0301_poll,
1938 .mmap = zc0301_mmap,
1939};
1940
1941
1942
1943static int
1944zc0301_usb_probe(struct usb_interface* intf, const struct usb_device_id* id)
1945{
1946 struct usb_device *udev = interface_to_usbdev(intf);
1947 struct zc0301_device* cam;
1948 static unsigned int dev_nr;
1949 unsigned int i;
1950 int err = 0;
1951
1952 if (!(cam = kzalloc(sizeof(struct zc0301_device), GFP_KERNEL)))
1953 return -ENOMEM;
1954
1955 cam->usbdev = udev;
1956
1957 if (!(cam->control_buffer = kzalloc(4, GFP_KERNEL))) {
1958 DBG(1, "kmalloc() failed");
1959 err = -ENOMEM;
1960 goto fail;
1961 }
1962
1963 if (!(cam->v4ldev = video_device_alloc())) {
1964 DBG(1, "video_device_alloc() failed");
1965 err = -ENOMEM;
1966 goto fail;
1967 }
1968
1969 DBG(2, "ZC0301[P] Image Processor and Control Chip detected "
1970 "(vid/pid 0x%04X:0x%04X)",id->idVendor, id->idProduct);
1971
1972 for (i = 0; zc0301_sensor_table[i]; i++) {
1973 err = zc0301_sensor_table[i](cam);
1974 if (!err)
1975 break;
1976 }
1977
1978 if (!err)
1979 DBG(2, "%s image sensor detected", cam->sensor.name);
1980 else {
1981 DBG(1, "No supported image sensor detected");
1982 err = -ENODEV;
1983 goto fail;
1984 }
1985
1986 if (zc0301_init(cam)) {
1987 DBG(1, "Initialization failed. I will retry on open().");
1988 cam->state |= DEV_MISCONFIGURED;
1989 }
1990
1991 strcpy(cam->v4ldev->name, "ZC0301[P] PC Camera");
1992 cam->v4ldev->fops = &zc0301_fops;
1993 cam->v4ldev->release = video_device_release;
1994 cam->v4ldev->parent = &udev->dev;
1995 video_set_drvdata(cam->v4ldev, cam);
1996
1997 init_completion(&cam->probe);
1998
1999 err = video_register_device(cam->v4ldev, VFL_TYPE_GRABBER,
2000 video_nr[dev_nr]);
2001 if (err) {
2002 DBG(1, "V4L2 device registration failed");
2003 if (err == -ENFILE && video_nr[dev_nr] == -1)
2004 DBG(1, "Free /dev/videoX node not found");
2005 video_nr[dev_nr] = -1;
2006 dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0;
2007 complete_all(&cam->probe);
2008 goto fail;
2009 }
2010
2011 DBG(2, "V4L2 device registered as %s",
2012 video_device_node_name(cam->v4ldev));
2013
2014 cam->module_param.force_munmap = force_munmap[dev_nr];
2015 cam->module_param.frame_timeout = frame_timeout[dev_nr];
2016
2017 dev_nr = (dev_nr < ZC0301_MAX_DEVICES-1) ? dev_nr+1 : 0;
2018
2019 usb_set_intfdata(intf, cam);
2020 kref_init(&cam->kref);
2021 usb_get_dev(cam->usbdev);
2022
2023 complete_all(&cam->probe);
2024
2025 return 0;
2026
2027fail:
2028 if (cam) {
2029 kfree(cam->control_buffer);
2030 if (cam->v4ldev)
2031 video_device_release(cam->v4ldev);
2032 kfree(cam);
2033 }
2034 return err;
2035}
2036
2037
2038static void zc0301_usb_disconnect(struct usb_interface* intf)
2039{
2040 struct zc0301_device* cam;
2041
2042 down_write(&zc0301_dev_lock);
2043
2044 cam = usb_get_intfdata(intf);
2045
2046 DBG(2, "Disconnecting %s...", cam->v4ldev->name);
2047
2048 if (cam->users) {
2049 DBG(2, "Device %s is open! Deregistration and "
2050 "memory deallocation are deferred.",
2051 video_device_node_name(cam->v4ldev));
2052 cam->state |= DEV_MISCONFIGURED;
2053 zc0301_stop_transfer(cam);
2054 cam->state |= DEV_DISCONNECTED;
2055 wake_up_interruptible(&cam->wait_frame);
2056 wake_up(&cam->wait_stream);
2057 } else
2058 cam->state |= DEV_DISCONNECTED;
2059
2060 wake_up_interruptible_all(&cam->wait_open);
2061
2062 kref_put(&cam->kref, zc0301_release_resources);
2063
2064 up_write(&zc0301_dev_lock);
2065}
2066
2067
2068static struct usb_driver zc0301_usb_driver = {
2069 .name = "zc0301",
2070 .id_table = zc0301_id_table,
2071 .probe = zc0301_usb_probe,
2072 .disconnect = zc0301_usb_disconnect,
2073};
2074
2075
2076
2077static int __init zc0301_module_init(void)
2078{
2079 int err = 0;
2080
2081 KDBG(2, ZC0301_MODULE_NAME " v" ZC0301_MODULE_VERSION);
2082 KDBG(3, ZC0301_MODULE_AUTHOR);
2083
2084 if ((err = usb_register(&zc0301_usb_driver)))
2085 KDBG(1, "usb_register() failed");
2086
2087 return err;
2088}
2089
2090
2091static void __exit zc0301_module_exit(void)
2092{
2093 usb_deregister(&zc0301_usb_driver);
2094}
2095
2096
2097module_init(zc0301_module_init);
2098module_exit(zc0301_module_exit);
2099
