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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / media / video / gspca / gspca.c
bloba50bf65de06e49a97b4d41444546c7cb3f27a9ae
1 /*
2 * Main USB camera driver
3 *
4 * Copyright (C) 2008-2010 Jean-François Moine <http://moinejf.free.fr>
5 *
6 * Camera button input handling by Márton Németh
7 * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 * for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #define MODULE_NAME "gspca"
25
26 #include <linux/init.h>
27 #include <linux/version.h>
28 #include <linux/fs.h>
29 #include <linux/vmalloc.h>
30 #include <linux/sched.h>
31 #include <linux/slab.h>
32 #include <linux/mm.h>
33 #include <linux/string.h>
34 #include <linux/pagemap.h>
35 #include <linux/io.h>
36 #include <asm/page.h>
37 #include <linux/uaccess.h>
38 #include <linux/ktime.h>
39 #include <media/v4l2-ioctl.h>
40
41 #include "gspca.h"
42
43 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
44 #include <linux/input.h>
45 #include <linux/usb/input.h>
46 #endif
47
48 /* global values */
49 #define DEF_NURBS 3 /* default number of URBs */
50 #if DEF_NURBS > MAX_NURBS
51 #error "DEF_NURBS too big"
52 #endif
53
54 MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
55 MODULE_DESCRIPTION("GSPCA USB Camera Driver");
56 MODULE_LICENSE("GPL");
57
58 #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 10, 0)
59
60 #ifdef GSPCA_DEBUG
61 int gspca_debug = D_ERR | D_PROBE;
62 EXPORT_SYMBOL(gspca_debug);
63
64 static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h)
65 {
66 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
67 PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d",
68 txt,
69 pixfmt & 0xff,
70 (pixfmt >> 8) & 0xff,
71 (pixfmt >> 16) & 0xff,
72 pixfmt >> 24,
73 w, h);
74 } else {
75 PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d",
76 txt,
77 pixfmt,
78 w, h);
79 }
80 }
81 #else
82 #define PDEBUG_MODE(txt, pixfmt, w, h)
83 #endif
84
85 /* specific memory types - !! should be different from V4L2_MEMORY_xxx */
86 #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
87 #define GSPCA_MEMORY_READ 7
88
89 #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
90
91 /*
92 * VMA operations.
93 */
94 static void gspca_vm_open(struct vm_area_struct *vma)
95 {
96 struct gspca_frame *frame = vma->vm_private_data;
97
98 frame->vma_use_count++;
99 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
100 }
101
102 static void gspca_vm_close(struct vm_area_struct *vma)
103 {
104 struct gspca_frame *frame = vma->vm_private_data;
105
106 if (--frame->vma_use_count <= 0)
107 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
108 }
109
110 static const struct vm_operations_struct gspca_vm_ops = {
111 .open = gspca_vm_open,
112 .close = gspca_vm_close,
113 };
114
115 /*
116 * Input and interrupt endpoint handling functions
117 */
118 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
119 static void int_irq(struct urb *urb)
120 {
121 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
122 int ret;
123
124 ret = urb->status;
125 switch (ret) {
126 case 0:
127 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
128 urb->transfer_buffer, urb->actual_length) < 0) {
129 PDEBUG(D_ERR, "Unknown packet received");
130 }
131 break;
132
133 case -ENOENT:
134 case -ECONNRESET:
135 case -ENODEV:
136 case -ESHUTDOWN:
137 /* Stop is requested either by software or hardware is gone,
138 * keep the ret value non-zero and don't resubmit later.
139 */
140 break;
141
142 default:
143 PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status);
144 urb->status = 0;
145 ret = 0;
146 }
147
148 if (ret == 0) {
149 ret = usb_submit_urb(urb, GFP_ATOMIC);
150 if (ret < 0)
151 PDEBUG(D_ERR, "Resubmit URB failed with error %i", ret);
152 }
153 }
154
155 static int gspca_input_connect(struct gspca_dev *dev)
156 {
157 struct input_dev *input_dev;
158 int err = 0;
159
160 dev->input_dev = NULL;
161 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
162 input_dev = input_allocate_device();
163 if (!input_dev)
164 return -ENOMEM;
165
166 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
167 strlcat(dev->phys, "/input0", sizeof(dev->phys));
168
169 input_dev->name = dev->sd_desc->name;
170 input_dev->phys = dev->phys;
171
172 usb_to_input_id(dev->dev, &input_dev->id);
173
174 input_dev->evbit[0] = BIT_MASK(EV_KEY);
175 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
176 input_dev->dev.parent = &dev->dev->dev;
177
178 err = input_register_device(input_dev);
179 if (err) {
180 PDEBUG(D_ERR, "Input device registration failed "
181 "with error %i", err);
182 input_dev->dev.parent = NULL;
183 input_free_device(input_dev);
184 } else {
185 dev->input_dev = input_dev;
186 }
187 }
188
189 return err;
190 }
191
192 static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
193 struct usb_endpoint_descriptor *ep)
194 {
195 unsigned int buffer_len;
196 int interval;
197 struct urb *urb;
198 struct usb_device *dev;
199 void *buffer = NULL;
200 int ret = -EINVAL;
201
202 buffer_len = le16_to_cpu(ep->wMaxPacketSize);
203 interval = ep->bInterval;
204 PDEBUG(D_CONF, "found int in endpoint: 0x%x, "
205 "buffer_len=%u, interval=%u",
206 ep->bEndpointAddress, buffer_len, interval);
207
208 dev = gspca_dev->dev;
209
210 urb = usb_alloc_urb(0, GFP_KERNEL);
211 if (!urb) {
212 ret = -ENOMEM;
213 goto error;
214 }
215
216 buffer = usb_alloc_coherent(dev, buffer_len,
217 GFP_KERNEL, &urb->transfer_dma);
218 if (!buffer) {
219 ret = -ENOMEM;
220 goto error_buffer;
221 }
222 usb_fill_int_urb(urb, dev,
223 usb_rcvintpipe(dev, ep->bEndpointAddress),
224 buffer, buffer_len,
225 int_irq, (void *)gspca_dev, interval);
226 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
227 gspca_dev->int_urb = urb;
228 ret = usb_submit_urb(urb, GFP_KERNEL);
229 if (ret < 0) {
230 PDEBUG(D_ERR, "submit int URB failed with error %i", ret);
231 goto error_submit;
232 }
233 return ret;
234
235 error_submit:
236 usb_free_coherent(dev,
237 urb->transfer_buffer_length,
238 urb->transfer_buffer,
239 urb->transfer_dma);
240 error_buffer:
241 usb_free_urb(urb);
242 error:
243 return ret;
244 }
245
246 static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
247 {
248 struct usb_interface *intf;
249 struct usb_host_interface *intf_desc;
250 struct usb_endpoint_descriptor *ep;
251 int i;
252
253 if (gspca_dev->sd_desc->int_pkt_scan) {
254 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
255 intf_desc = intf->cur_altsetting;
256 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
257 ep = &intf_desc->endpoint[i].desc;
258 if (usb_endpoint_dir_in(ep) &&
259 usb_endpoint_xfer_int(ep)) {
260
261 alloc_and_submit_int_urb(gspca_dev, ep);
262 break;
263 }
264 }
265 }
266 }
267
268 static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
269 {
270 struct urb *urb;
271
272 urb = gspca_dev->int_urb;
273 if (urb) {
274 gspca_dev->int_urb = NULL;
275 usb_kill_urb(urb);
276 usb_free_coherent(gspca_dev->dev,
277 urb->transfer_buffer_length,
278 urb->transfer_buffer,
279 urb->transfer_dma);
280 usb_free_urb(urb);
281 }
282 }
283 #else
284 static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
285 {
286 }
287
288 static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
289 {
290 }
291
292 static inline int gspca_input_connect(struct gspca_dev *dev)
293 {
294 return 0;
295 }
296 #endif
297
298 /*
299 * fill a video frame from an URB and resubmit
300 */
301 static void fill_frame(struct gspca_dev *gspca_dev,
302 struct urb *urb)
303 {
304 u8 *data; /* address of data in the iso message */
305 int i, len, st;
306 cam_pkt_op pkt_scan;
307
308 if (urb->status != 0) {
309 if (urb->status == -ESHUTDOWN)
310 return; /* disconnection */
311 #ifdef CONFIG_PM
312 if (gspca_dev->frozen)
313 return;
314 #endif
315 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
316 urb->status = 0;
317 goto resubmit;
318 }
319 pkt_scan = gspca_dev->sd_desc->pkt_scan;
320 for (i = 0; i < urb->number_of_packets; i++) {
321
322 /* check the packet status and length */
323 len = urb->iso_frame_desc[i].actual_length;
324 if (len == 0) {
325 if (gspca_dev->empty_packet == 0)
326 gspca_dev->empty_packet = 1;
327 continue;
328 }
329 st = urb->iso_frame_desc[i].status;
330 if (st) {
331 PDEBUG(D_ERR,
332 "ISOC data error: [%d] len=%d, status=%d",
333 i, len, st);
334 gspca_dev->last_packet_type = DISCARD_PACKET;
335 continue;
336 }
337
338 /* let the packet be analyzed by the subdriver */
339 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
340 i, urb->iso_frame_desc[i].offset, len);
341 data = (u8 *) urb->transfer_buffer
342 + urb->iso_frame_desc[i].offset;
343 pkt_scan(gspca_dev, data, len);
344 }
345
346 resubmit:
347 /* resubmit the URB */
348 st = usb_submit_urb(urb, GFP_ATOMIC);
349 if (st < 0)
350 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
351 }
352
353 /*
354 * ISOC message interrupt from the USB device
355 *
356 * Analyse each packet and call the subdriver for copy to the frame buffer.
357 */
358 static void isoc_irq(struct urb *urb)
359 {
360 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
361
362 PDEBUG(D_PACK, "isoc irq");
363 if (!gspca_dev->streaming)
364 return;
365 fill_frame(gspca_dev, urb);
366 }
367
368 /*
369 * bulk message interrupt from the USB device
370 */
371 static void bulk_irq(struct urb *urb)
372 {
373 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
374 int st;
375
376 PDEBUG(D_PACK, "bulk irq");
377 if (!gspca_dev->streaming)
378 return;
379 switch (urb->status) {
380 case 0:
381 break;
382 case -ESHUTDOWN:
383 return; /* disconnection */
384 default:
385 #ifdef CONFIG_PM
386 if (gspca_dev->frozen)
387 return;
388 #endif
389 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
390 urb->status = 0;
391 goto resubmit;
392 }
393
394 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
395 gspca_dev->sd_desc->pkt_scan(gspca_dev,
396 urb->transfer_buffer,
397 urb->actual_length);
398
399 resubmit:
400 /* resubmit the URB */
401 if (gspca_dev->cam.bulk_nurbs != 0) {
402 st = usb_submit_urb(urb, GFP_ATOMIC);
403 if (st < 0)
404 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
405 }
406 }
407
408 /*
409 * add data to the current frame
410 *
411 * This function is called by the subdrivers at interrupt level.
412 *
413 * To build a frame, these ones must add
414 * - one FIRST_PACKET
415 * - 0 or many INTER_PACKETs
416 * - one LAST_PACKET
417 * DISCARD_PACKET invalidates the whole frame.
418 * On LAST_PACKET, a new frame is returned.
419 */
420 void gspca_frame_add(struct gspca_dev *gspca_dev,
421 enum gspca_packet_type packet_type,
422 const u8 *data,
423 int len)
424 {
425 struct gspca_frame *frame;
426 int i, j;
427
428 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
429
430 if (packet_type == FIRST_PACKET) {
431 i = atomic_read(&gspca_dev->fr_i);
432
433 /* if there are no queued buffer, discard the whole frame */
434 if (i == atomic_read(&gspca_dev->fr_q)) {
435 gspca_dev->last_packet_type = DISCARD_PACKET;
436 return;
437 }
438 j = gspca_dev->fr_queue[i];
439 frame = &gspca_dev->frame[j];
440 frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
441 frame->v4l2_buf.sequence = ++gspca_dev->sequence;
442 gspca_dev->image = frame->data;
443 gspca_dev->image_len = 0;
444 } else {
445 switch (gspca_dev->last_packet_type) {
446 case DISCARD_PACKET:
447 if (packet_type == LAST_PACKET)
448 gspca_dev->last_packet_type = packet_type;
449 return;
450 case LAST_PACKET:
451 return;
452 }
453 }
454
455 /* append the packet to the frame buffer */
456 if (len > 0) {
457 if (gspca_dev->image_len + len > gspca_dev->frsz) {
458 PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d",
459 gspca_dev->image_len + len,
460 gspca_dev->frsz);
461 packet_type = DISCARD_PACKET;
462 } else {
463 /* !! image is NULL only when last pkt is LAST or DISCARD
464 if (gspca_dev->image == NULL) {
465 err("gspca_frame_add() image == NULL");
466 return;
467 }
468 */
469 memcpy(gspca_dev->image + gspca_dev->image_len,
470 data, len);
471 gspca_dev->image_len += len;
472 }
473 }
474 gspca_dev->last_packet_type = packet_type;
475
476 /* if last packet, invalidate packet concatenation until
477 * next first packet, wake up the application and advance
478 * in the queue */
479 if (packet_type == LAST_PACKET) {
480 i = atomic_read(&gspca_dev->fr_i);
481 j = gspca_dev->fr_queue[i];
482 frame = &gspca_dev->frame[j];
483 frame->v4l2_buf.bytesused = gspca_dev->image_len;
484 frame->v4l2_buf.flags = (frame->v4l2_buf.flags
485 | V4L2_BUF_FLAG_DONE)
486 & ~V4L2_BUF_FLAG_QUEUED;
487 i = (i + 1) % GSPCA_MAX_FRAMES;
488 atomic_set(&gspca_dev->fr_i, i);
489 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
490 PDEBUG(D_FRAM, "frame complete len:%d",
491 frame->v4l2_buf.bytesused);
492 gspca_dev->image = NULL;
493 gspca_dev->image_len = 0;
494 }
495 }
496 EXPORT_SYMBOL(gspca_frame_add);
497
498 static int gspca_is_compressed(__u32 format)
499 {
500 switch (format) {
501 case V4L2_PIX_FMT_MJPEG:
502 case V4L2_PIX_FMT_JPEG:
503 case V4L2_PIX_FMT_SPCA561:
504 case V4L2_PIX_FMT_PAC207:
505 case V4L2_PIX_FMT_MR97310A:
506 return 1;
507 }
508 return 0;
509 }
510
511 static int frame_alloc(struct gspca_dev *gspca_dev,
512 unsigned int count)
513 {
514 struct gspca_frame *frame;
515 unsigned int frsz;
516 int i;
517
518 i = gspca_dev->curr_mode;
519 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
520 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
521 frsz = PAGE_ALIGN(frsz);
522 gspca_dev->frsz = frsz;
523 if (count >= GSPCA_MAX_FRAMES)
524 count = GSPCA_MAX_FRAMES - 1;
525 gspca_dev->frbuf = vmalloc_32(frsz * count);
526 if (!gspca_dev->frbuf) {
527 err("frame alloc failed");
528 return -ENOMEM;
529 }
530 gspca_dev->nframes = count;
531 for (i = 0; i < count; i++) {
532 frame = &gspca_dev->frame[i];
533 frame->v4l2_buf.index = i;
534 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
535 frame->v4l2_buf.flags = 0;
536 frame->v4l2_buf.field = V4L2_FIELD_NONE;
537 frame->v4l2_buf.length = frsz;
538 frame->v4l2_buf.memory = gspca_dev->memory;
539 frame->v4l2_buf.sequence = 0;
540 frame->data = gspca_dev->frbuf + i * frsz;
541 frame->v4l2_buf.m.offset = i * frsz;
542 }
543 atomic_set(&gspca_dev->fr_q, 0);
544 atomic_set(&gspca_dev->fr_i, 0);
545 gspca_dev->fr_o = 0;
546 return 0;
547 }
548
549 static void frame_free(struct gspca_dev *gspca_dev)
550 {
551 int i;
552
553 PDEBUG(D_STREAM, "frame free");
554 if (gspca_dev->frbuf != NULL) {
555 vfree(gspca_dev->frbuf);
556 gspca_dev->frbuf = NULL;
557 for (i = 0; i < gspca_dev->nframes; i++)
558 gspca_dev->frame[i].data = NULL;
559 }
560 gspca_dev->nframes = 0;
561 }
562
563 static void destroy_urbs(struct gspca_dev *gspca_dev)
564 {
565 struct urb *urb;
566 unsigned int i;
567
568 PDEBUG(D_STREAM, "kill transfer");
569 for (i = 0; i < MAX_NURBS; i++) {
570 urb = gspca_dev->urb[i];
571 if (urb == NULL)
572 break;
573
574 gspca_dev->urb[i] = NULL;
575 usb_kill_urb(urb);
576 if (urb->transfer_buffer != NULL)
577 usb_free_coherent(gspca_dev->dev,
578 urb->transfer_buffer_length,
579 urb->transfer_buffer,
580 urb->transfer_dma);
581 usb_free_urb(urb);
582 }
583 }
584
585 static int gspca_set_alt0(struct gspca_dev *gspca_dev)
586 {
587 int ret;
588
589 if (gspca_dev->alt == 0)
590 return 0;
591 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
592 if (ret < 0)
593 PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret);
594 return ret;
595 }
596
597 /* Note: both the queue and the usb locks should be held when calling this */
598 static void gspca_stream_off(struct gspca_dev *gspca_dev)
599 {
600 gspca_dev->streaming = 0;
601 if (gspca_dev->present) {
602 if (gspca_dev->sd_desc->stopN)
603 gspca_dev->sd_desc->stopN(gspca_dev);
604 destroy_urbs(gspca_dev);
605 gspca_input_destroy_urb(gspca_dev);
606 gspca_set_alt0(gspca_dev);
607 gspca_input_create_urb(gspca_dev);
608 }
609
610 /* always call stop0 to free the subdriver's resources */
611 if (gspca_dev->sd_desc->stop0)
612 gspca_dev->sd_desc->stop0(gspca_dev);
613 PDEBUG(D_STREAM, "stream off OK");
614 }
615
616 /*
617 * look for an input transfer endpoint in an alternate setting
618 */
619 static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
620 int xfer)
621 {
622 struct usb_host_endpoint *ep;
623 int i, attr;
624
625 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
626 ep = &alt->endpoint[i];
627 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
628 if (attr == xfer
629 && ep->desc.wMaxPacketSize != 0)
630 return ep;
631 }
632 return NULL;
633 }
634
635 /*
636 * look for an input (isoc or bulk) endpoint
637 *
638 * The endpoint is defined by the subdriver.
639 * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
640 * This routine may be called many times when the bandwidth is too small
641 * (the bandwidth is checked on urb submit).
642 */
643 static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
644 {
645 struct usb_interface *intf;
646 struct usb_host_endpoint *ep;
647 int xfer, i, ret;
648
649 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
650 ep = NULL;
651 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
652 : USB_ENDPOINT_XFER_ISOC;
653 i = gspca_dev->alt; /* previous alt setting */
654 if (gspca_dev->cam.reverse_alts) {
655 if (gspca_dev->audio && i < gspca_dev->nbalt - 2)
656 i++;
657 while (++i < gspca_dev->nbalt) {
658 ep = alt_xfer(&intf->altsetting[i], xfer);
659 if (ep)
660 break;
661 }
662 } else {
663 if (gspca_dev->audio && i > 1)
664 i--;
665 while (--i >= 0) {
666 ep = alt_xfer(&intf->altsetting[i], xfer);
667 if (ep)
668 break;
669 }
670 }
671 if (ep == NULL) {
672 err("no transfer endpoint found");
673 return NULL;
674 }
675 PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
676 i, ep->desc.bEndpointAddress);
677 gspca_dev->alt = i; /* memorize the current alt setting */
678 if (gspca_dev->nbalt > 1) {
679 gspca_input_destroy_urb(gspca_dev);
680 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
681 if (ret < 0) {
682 err("set alt %d err %d", i, ret);
683 ep = NULL;
684 }
685 gspca_input_create_urb(gspca_dev);
686 }
687 return ep;
688 }
689
690 /*
691 * create the URBs for image transfer
692 */
693 static int create_urbs(struct gspca_dev *gspca_dev,
694 struct usb_host_endpoint *ep)
695 {
696 struct urb *urb;
697 int n, nurbs, i, psize, npkt, bsize;
698
699 /* calculate the packet size and the number of packets */
700 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
701
702 if (!gspca_dev->cam.bulk) { /* isoc */
703
704 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
705 if (gspca_dev->pkt_size == 0)
706 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
707 else
708 psize = gspca_dev->pkt_size;
709 npkt = gspca_dev->cam.npkt;
710 if (npkt == 0)
711 npkt = 32; /* default value */
712 bsize = psize * npkt;
713 PDEBUG(D_STREAM,
714 "isoc %d pkts size %d = bsize:%d",
715 npkt, psize, bsize);
716 nurbs = DEF_NURBS;
717 } else { /* bulk */
718 npkt = 0;
719 bsize = gspca_dev->cam.bulk_size;
720 if (bsize == 0)
721 bsize = psize;
722 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
723 if (gspca_dev->cam.bulk_nurbs != 0)
724 nurbs = gspca_dev->cam.bulk_nurbs;
725 else
726 nurbs = 1;
727 }
728
729 for (n = 0; n < nurbs; n++) {
730 urb = usb_alloc_urb(npkt, GFP_KERNEL);
731 if (!urb) {
732 err("usb_alloc_urb failed");
733 return -ENOMEM;
734 }
735 gspca_dev->urb[n] = urb;
736 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
737 bsize,
738 GFP_KERNEL,
739 &urb->transfer_dma);
740
741 if (urb->transfer_buffer == NULL) {
742 err("usb_alloc_coherent failed");
743 return -ENOMEM;
744 }
745 urb->dev = gspca_dev->dev;
746 urb->context = gspca_dev;
747 urb->transfer_buffer_length = bsize;
748 if (npkt != 0) { /* ISOC */
749 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
750 ep->desc.bEndpointAddress);
751 urb->transfer_flags = URB_ISO_ASAP
752 | URB_NO_TRANSFER_DMA_MAP;
753 urb->interval = ep->desc.bInterval;
754 urb->complete = isoc_irq;
755 urb->number_of_packets = npkt;
756 for (i = 0; i < npkt; i++) {
757 urb->iso_frame_desc[i].length = psize;
758 urb->iso_frame_desc[i].offset = psize * i;
759 }
760 } else { /* bulk */
761 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
762 ep->desc.bEndpointAddress),
763 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
764 urb->complete = bulk_irq;
765 }
766 }
767 return 0;
768 }
769
770 /*
771 * start the USB transfer
772 */
773 static int gspca_init_transfer(struct gspca_dev *gspca_dev)
774 {
775 struct usb_host_endpoint *ep;
776 struct urb *urb;
777 int n, ret;
778
779 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
780 return -ERESTARTSYS;
781
782 if (!gspca_dev->present) {
783 ret = -ENODEV;
784 goto out;
785 }
786
787 /* reset the streaming variables */
788 gspca_dev->image = NULL;
789 gspca_dev->image_len = 0;
790 gspca_dev->last_packet_type = DISCARD_PACKET;
791 gspca_dev->sequence = 0;
792
793 gspca_dev->usb_err = 0;
794
795 /* set the higher alternate setting and
796 * loop until urb submit succeeds */
797 if (gspca_dev->cam.reverse_alts)
798 gspca_dev->alt = 0;
799 else
800 gspca_dev->alt = gspca_dev->nbalt;
801
802 if (gspca_dev->sd_desc->isoc_init) {
803 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
804 if (ret < 0)
805 goto out;
806 }
807 ep = get_ep(gspca_dev);
808 if (ep == NULL) {
809 ret = -EIO;
810 goto out;
811 }
812 for (;;) {
813 if (!gspca_dev->cam.no_urb_create) {
814 PDEBUG(D_STREAM, "init transfer alt %d",
815 gspca_dev->alt);
816 ret = create_urbs(gspca_dev, ep);
817 if (ret < 0) {
818 destroy_urbs(gspca_dev);
819 goto out;
820 }
821 }
822
823 /* clear the bulk endpoint */
824 if (gspca_dev->cam.bulk)
825 usb_clear_halt(gspca_dev->dev,
826 gspca_dev->urb[0]->pipe);
827
828 /* start the cam */
829 ret = gspca_dev->sd_desc->start(gspca_dev);
830 if (ret < 0) {
831 destroy_urbs(gspca_dev);
832 goto out;
833 }
834 gspca_dev->streaming = 1;
835
836 /* some bulk transfers are started by the subdriver */
837 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
838 break;
839
840 /* submit the URBs */
841 for (n = 0; n < MAX_NURBS; n++) {
842 urb = gspca_dev->urb[n];
843 if (urb == NULL)
844 break;
845 ret = usb_submit_urb(urb, GFP_KERNEL);
846 if (ret < 0)
847 break;
848 }
849 if (ret >= 0)
850 break;
851 gspca_stream_off(gspca_dev);
852 if (ret != -ENOSPC) {
853 PDEBUG(D_ERR|D_STREAM,
854 "usb_submit_urb alt %d err %d",
855 gspca_dev->alt, ret);
856 goto out;
857 }
858
859 /* the bandwidth is not wide enough
860 * negociate or try a lower alternate setting */
861 PDEBUG(D_ERR|D_STREAM,
862 "bandwidth not wide enough - trying again");
863 msleep(20); /* wait for kill complete */
864 if (gspca_dev->sd_desc->isoc_nego) {
865 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
866 if (ret < 0)
867 goto out;
868 } else {
869 ep = get_ep(gspca_dev);
870 if (ep == NULL) {
871 ret = -EIO;
872 goto out;
873 }
874 }
875 }
876 out:
877 mutex_unlock(&gspca_dev->usb_lock);
878 return ret;
879 }
880
881 static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
882 {
883 int i;
884
885 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
886 gspca_dev->curr_mode = i;
887 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
888 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
889 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
890 }
891
892 static int wxh_to_mode(struct gspca_dev *gspca_dev,
893 int width, int height)
894 {
895 int i;
896
897 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
898 if (width >= gspca_dev->cam.cam_mode[i].width
899 && height >= gspca_dev->cam.cam_mode[i].height)
900 break;
901 }
902 return i;
903 }
904
905 /*
906 * search a mode with the right pixel format
907 */
908 static int gspca_get_mode(struct gspca_dev *gspca_dev,
909 int mode,
910 int pixfmt)
911 {
912 int modeU, modeD;
913
914 modeU = modeD = mode;
915 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
916 if (--modeD >= 0) {
917 if (gspca_dev->cam.cam_mode[modeD].pixelformat
918 == pixfmt)
919 return modeD;
920 }
921 if (++modeU < gspca_dev->cam.nmodes) {
922 if (gspca_dev->cam.cam_mode[modeU].pixelformat
923 == pixfmt)
924 return modeU;
925 }
926 }
927 return -EINVAL;
928 }
929
930 #ifdef CONFIG_VIDEO_ADV_DEBUG
931 static int vidioc_g_register(struct file *file, void *priv,
932 struct v4l2_dbg_register *reg)
933 {
934 int ret;
935 struct gspca_dev *gspca_dev = priv;
936
937 if (!gspca_dev->sd_desc->get_chip_ident)
938 return -EINVAL;
939
940 if (!gspca_dev->sd_desc->get_register)
941 return -EINVAL;
942
943 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
944 return -ERESTARTSYS;
945 gspca_dev->usb_err = 0;
946 if (gspca_dev->present)
947 ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
948 else
949 ret = -ENODEV;
950 mutex_unlock(&gspca_dev->usb_lock);
951
952 return ret;
953 }
954
955 static int vidioc_s_register(struct file *file, void *priv,
956 struct v4l2_dbg_register *reg)
957 {
958 int ret;
959 struct gspca_dev *gspca_dev = priv;
960
961 if (!gspca_dev->sd_desc->get_chip_ident)
962 return -EINVAL;
963
964 if (!gspca_dev->sd_desc->set_register)
965 return -EINVAL;
966
967 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
968 return -ERESTARTSYS;
969 gspca_dev->usb_err = 0;
970 if (gspca_dev->present)
971 ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
972 else
973 ret = -ENODEV;
974 mutex_unlock(&gspca_dev->usb_lock);
975
976 return ret;
977 }
978 #endif
979
980 static int vidioc_g_chip_ident(struct file *file, void *priv,
981 struct v4l2_dbg_chip_ident *chip)
982 {
983 int ret;
984 struct gspca_dev *gspca_dev = priv;
985
986 if (!gspca_dev->sd_desc->get_chip_ident)
987 return -EINVAL;
988
989 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
990 return -ERESTARTSYS;
991 gspca_dev->usb_err = 0;
992 if (gspca_dev->present)
993 ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
994 else
995 ret = -ENODEV;
996 mutex_unlock(&gspca_dev->usb_lock);
997
998 return ret;
999 }
1000
1001 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1002 struct v4l2_fmtdesc *fmtdesc)
1003 {
1004 struct gspca_dev *gspca_dev = priv;
1005 int i, j, index;
1006 __u32 fmt_tb[8];
1007
1008 /* give an index to each format */
1009 index = 0;
1010 j = 0;
1011 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
1012 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
1013 j = 0;
1014 for (;;) {
1015 if (fmt_tb[j] == fmt_tb[index])
1016 break;
1017 j++;
1018 }
1019 if (j == index) {
1020 if (fmtdesc->index == index)
1021 break; /* new format */
1022 index++;
1023 if (index >= ARRAY_SIZE(fmt_tb))
1024 return -EINVAL;
1025 }
1026 }
1027 if (i < 0)
1028 return -EINVAL; /* no more format */
1029
1030 fmtdesc->pixelformat = fmt_tb[index];
1031 if (gspca_is_compressed(fmt_tb[index]))
1032 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1033 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1034 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1035 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1036 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1037 fmtdesc->description[4] = '\0';
1038 return 0;
1039 }
1040
1041 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1042 struct v4l2_format *fmt)
1043 {
1044 struct gspca_dev *gspca_dev = priv;
1045 int mode;
1046
1047 mode = gspca_dev->curr_mode;
1048 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1049 sizeof fmt->fmt.pix);
1050 return 0;
1051 }
1052
1053 static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
1054 struct v4l2_format *fmt)
1055 {
1056 int w, h, mode, mode2;
1057
1058 w = fmt->fmt.pix.width;
1059 h = fmt->fmt.pix.height;
1060
1061 #ifdef GSPCA_DEBUG
1062 if (gspca_debug & D_CONF)
1063 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1064 #endif
1065 /* search the closest mode for width and height */
1066 mode = wxh_to_mode(gspca_dev, w, h);
1067
1068 /* OK if right palette */
1069 if (gspca_dev->cam.cam_mode[mode].pixelformat
1070 != fmt->fmt.pix.pixelformat) {
1071
1072 /* else, search the closest mode with the same pixel format */
1073 mode2 = gspca_get_mode(gspca_dev, mode,
1074 fmt->fmt.pix.pixelformat);
1075 if (mode2 >= 0)
1076 mode = mode2;
1077 /* else
1078 ; * no chance, return this mode */
1079 }
1080 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1081 sizeof fmt->fmt.pix);
1082 return mode; /* used when s_fmt */
1083 }
1084
1085 static int vidioc_try_fmt_vid_cap(struct file *file,
1086 void *priv,
1087 struct v4l2_format *fmt)
1088 {
1089 struct gspca_dev *gspca_dev = priv;
1090 int ret;
1091
1092 ret = try_fmt_vid_cap(gspca_dev, fmt);
1093 if (ret < 0)
1094 return ret;
1095 return 0;
1096 }
1097
1098 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1099 struct v4l2_format *fmt)
1100 {
1101 struct gspca_dev *gspca_dev = priv;
1102 int ret;
1103
1104 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1105 return -ERESTARTSYS;
1106
1107 ret = try_fmt_vid_cap(gspca_dev, fmt);
1108 if (ret < 0)
1109 goto out;
1110
1111 if (gspca_dev->nframes != 0
1112 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1113 ret = -EINVAL;
1114 goto out;
1115 }
1116
1117 if (ret == gspca_dev->curr_mode) {
1118 ret = 0;
1119 goto out; /* same mode */
1120 }
1121
1122 if (gspca_dev->streaming) {
1123 ret = -EBUSY;
1124 goto out;
1125 }
1126 gspca_dev->width = fmt->fmt.pix.width;
1127 gspca_dev->height = fmt->fmt.pix.height;
1128 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1129 gspca_dev->curr_mode = ret;
1130
1131 ret = 0;
1132 out:
1133 mutex_unlock(&gspca_dev->queue_lock);
1134 return ret;
1135 }
1136
1137 static int vidioc_enum_framesizes(struct file *file, void *priv,
1138 struct v4l2_frmsizeenum *fsize)
1139 {
1140 struct gspca_dev *gspca_dev = priv;
1141 int i;
1142 __u32 index = 0;
1143
1144 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1145 if (fsize->pixel_format !=
1146 gspca_dev->cam.cam_mode[i].pixelformat)
1147 continue;
1148
1149 if (fsize->index == index) {
1150 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1151 fsize->discrete.width =
1152 gspca_dev->cam.cam_mode[i].width;
1153 fsize->discrete.height =
1154 gspca_dev->cam.cam_mode[i].height;
1155 return 0;
1156 }
1157 index++;
1158 }
1159
1160 return -EINVAL;
1161 }
1162
1163 static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1164 struct v4l2_frmivalenum *fival)
1165 {
1166 struct gspca_dev *gspca_dev = priv;
1167 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1168 __u32 i;
1169
1170 if (gspca_dev->cam.mode_framerates == NULL ||
1171 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1172 return -EINVAL;
1173
1174 if (fival->pixel_format !=
1175 gspca_dev->cam.cam_mode[mode].pixelformat)
1176 return -EINVAL;
1177
1178 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1179 if (fival->index == i) {
1180 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1181 fival->discrete.numerator = 1;
1182 fival->discrete.denominator =
1183 gspca_dev->cam.mode_framerates[mode].rates[i];
1184 return 0;
1185 }
1186 }
1187
1188 return -EINVAL;
1189 }
1190
1191 static void gspca_release(struct video_device *vfd)
1192 {
1193 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
1194
1195 PDEBUG(D_PROBE, "%s released",
1196 video_device_node_name(&gspca_dev->vdev));
1197
1198 kfree(gspca_dev->usb_buf);
1199 kfree(gspca_dev);
1200 }
1201
1202 static int dev_open(struct file *file)
1203 {
1204 struct gspca_dev *gspca_dev;
1205 int ret;
1206
1207 PDEBUG(D_STREAM, "[%s] open", current->comm);
1208 gspca_dev = (struct gspca_dev *) video_devdata(file);
1209 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1210 return -ERESTARTSYS;
1211 if (!gspca_dev->present) {
1212 ret = -ENODEV;
1213 goto out;
1214 }
1215
1216 if (gspca_dev->users > 4) { /* (arbitrary value) */
1217 ret = -EBUSY;
1218 goto out;
1219 }
1220
1221 /* protect the subdriver against rmmod */
1222 if (!try_module_get(gspca_dev->module)) {
1223 ret = -ENODEV;
1224 goto out;
1225 }
1226
1227 gspca_dev->users++;
1228
1229 file->private_data = gspca_dev;
1230 #ifdef GSPCA_DEBUG
1231 /* activate the v4l2 debug */
1232 if (gspca_debug & D_V4L2)
1233 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
1234 | V4L2_DEBUG_IOCTL_ARG;
1235 else
1236 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
1237 | V4L2_DEBUG_IOCTL_ARG);
1238 #endif
1239 ret = 0;
1240 out:
1241 mutex_unlock(&gspca_dev->queue_lock);
1242 if (ret != 0)
1243 PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
1244 else
1245 PDEBUG(D_STREAM, "open done");
1246 return ret;
1247 }
1248
1249 static int dev_close(struct file *file)
1250 {
1251 struct gspca_dev *gspca_dev = file->private_data;
1252
1253 PDEBUG(D_STREAM, "[%s] close", current->comm);
1254 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1255 return -ERESTARTSYS;
1256 gspca_dev->users--;
1257
1258 /* if the file did the capture, free the streaming resources */
1259 if (gspca_dev->capt_file == file) {
1260 if (gspca_dev->streaming) {
1261 mutex_lock(&gspca_dev->usb_lock);
1262 gspca_dev->usb_err = 0;
1263 gspca_stream_off(gspca_dev);
1264 mutex_unlock(&gspca_dev->usb_lock);
1265 }
1266 frame_free(gspca_dev);
1267 gspca_dev->capt_file = NULL;
1268 gspca_dev->memory = GSPCA_MEMORY_NO;
1269 }
1270 file->private_data = NULL;
1271 module_put(gspca_dev->module);
1272 mutex_unlock(&gspca_dev->queue_lock);
1273
1274 PDEBUG(D_STREAM, "close done");
1275
1276 return 0;
1277 }
1278
1279 static int vidioc_querycap(struct file *file, void *priv,
1280 struct v4l2_capability *cap)
1281 {
1282 struct gspca_dev *gspca_dev = priv;
1283 int ret;
1284
1285 /* protect the access to the usb device */
1286 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1287 return -ERESTARTSYS;
1288 if (!gspca_dev->present) {
1289 ret = -ENODEV;
1290 goto out;
1291 }
1292 strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
1293 if (gspca_dev->dev->product != NULL) {
1294 strncpy(cap->card, gspca_dev->dev->product,
1295 sizeof cap->card);
1296 } else {
1297 snprintf(cap->card, sizeof cap->card,
1298 "USB Camera (%04x:%04x)",
1299 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1300 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1301 }
1302 usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info));
1303 cap->version = DRIVER_VERSION_NUMBER;
1304 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
1305 | V4L2_CAP_STREAMING
1306 | V4L2_CAP_READWRITE;
1307 ret = 0;
1308 out:
1309 mutex_unlock(&gspca_dev->usb_lock);
1310 return ret;
1311 }
1312
1313 static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev,
1314 int id)
1315 {
1316 const struct ctrl *ctrls;
1317 int i;
1318
1319 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1320 i < gspca_dev->sd_desc->nctrls;
1321 i++, ctrls++) {
1322 if (gspca_dev->ctrl_dis & (1 << i))
1323 continue;
1324 if (id == ctrls->qctrl.id)
1325 return ctrls;
1326 }
1327 return NULL;
1328 }
1329
1330 static int vidioc_queryctrl(struct file *file, void *priv,
1331 struct v4l2_queryctrl *q_ctrl)
1332 {
1333 struct gspca_dev *gspca_dev = priv;
1334 const struct ctrl *ctrls;
1335 int i;
1336 u32 id;
1337
1338 ctrls = NULL;
1339 id = q_ctrl->id;
1340 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1341 id &= V4L2_CTRL_ID_MASK;
1342 id++;
1343 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
1344 if (gspca_dev->ctrl_dis & (1 << i))
1345 continue;
1346 if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
1347 continue;
1348 if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id
1349 > ctrls->qctrl.id)
1350 continue;
1351 ctrls = &gspca_dev->sd_desc->ctrls[i];
1352 }
1353 if (ctrls == NULL)
1354 return -EINVAL;
1355 } else {
1356 ctrls = get_ctrl(gspca_dev, id);
1357 if (ctrls == NULL)
1358 return -EINVAL;
1359 i = ctrls - gspca_dev->sd_desc->ctrls;
1360 }
1361 memcpy(q_ctrl, ctrls, sizeof *q_ctrl);
1362 if (gspca_dev->ctrl_inac & (1 << i))
1363 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
1364 return 0;
1365 }
1366
1367 static int vidioc_s_ctrl(struct file *file, void *priv,
1368 struct v4l2_control *ctrl)
1369 {
1370 struct gspca_dev *gspca_dev = priv;
1371 const struct ctrl *ctrls;
1372 int ret;
1373
1374 ctrls = get_ctrl(gspca_dev, ctrl->id);
1375 if (ctrls == NULL)
1376 return -EINVAL;
1377
1378 if (ctrl->value < ctrls->qctrl.minimum
1379 || ctrl->value > ctrls->qctrl.maximum)
1380 return -ERANGE;
1381 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1382 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1383 return -ERESTARTSYS;
1384 gspca_dev->usb_err = 0;
1385 if (gspca_dev->present)
1386 ret = ctrls->set(gspca_dev, ctrl->value);
1387 else
1388 ret = -ENODEV;
1389 mutex_unlock(&gspca_dev->usb_lock);
1390 return ret;
1391 }
1392
1393 static int vidioc_g_ctrl(struct file *file, void *priv,
1394 struct v4l2_control *ctrl)
1395 {
1396 struct gspca_dev *gspca_dev = priv;
1397 const struct ctrl *ctrls;
1398 int ret;
1399
1400 ctrls = get_ctrl(gspca_dev, ctrl->id);
1401 if (ctrls == NULL)
1402 return -EINVAL;
1403
1404 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1405 return -ERESTARTSYS;
1406 gspca_dev->usb_err = 0;
1407 if (gspca_dev->present)
1408 ret = ctrls->get(gspca_dev, &ctrl->value);
1409 else
1410 ret = -ENODEV;
1411 mutex_unlock(&gspca_dev->usb_lock);
1412 return ret;
1413 }
1414
1415 static int vidioc_querymenu(struct file *file, void *priv,
1416 struct v4l2_querymenu *qmenu)
1417 {
1418 struct gspca_dev *gspca_dev = priv;
1419
1420 if (!gspca_dev->sd_desc->querymenu)
1421 return -EINVAL;
1422 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1423 }
1424
1425 static int vidioc_enum_input(struct file *file, void *priv,
1426 struct v4l2_input *input)
1427 {
1428 struct gspca_dev *gspca_dev = priv;
1429
1430 if (input->index != 0)
1431 return -EINVAL;
1432 input->type = V4L2_INPUT_TYPE_CAMERA;
1433 input->status = gspca_dev->cam.input_flags;
1434 strncpy(input->name, gspca_dev->sd_desc->name,
1435 sizeof input->name);
1436 return 0;
1437 }
1438
1439 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1440 {
1441 *i = 0;
1442 return 0;
1443 }
1444
1445 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1446 {
1447 if (i > 0)
1448 return -EINVAL;
1449 return (0);
1450 }
1451
1452 static int vidioc_reqbufs(struct file *file, void *priv,
1453 struct v4l2_requestbuffers *rb)
1454 {
1455 struct gspca_dev *gspca_dev = priv;
1456 int i, ret = 0, streaming;
1457
1458 i = rb->memory; /* (avoid compilation warning) */
1459 switch (i) {
1460 case GSPCA_MEMORY_READ: /* (internal call) */
1461 case V4L2_MEMORY_MMAP:
1462 case V4L2_MEMORY_USERPTR:
1463 break;
1464 default:
1465 return -EINVAL;
1466 }
1467 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1468 return -ERESTARTSYS;
1469
1470 if (gspca_dev->memory != GSPCA_MEMORY_NO
1471 && gspca_dev->memory != rb->memory) {
1472 ret = -EBUSY;
1473 goto out;
1474 }
1475
1476 /* only one file may do the capture */
1477 if (gspca_dev->capt_file != NULL
1478 && gspca_dev->capt_file != file) {
1479 ret = -EBUSY;
1480 goto out;
1481 }
1482
1483 /* if allocated, the buffers must not be mapped */
1484 for (i = 0; i < gspca_dev->nframes; i++) {
1485 if (gspca_dev->frame[i].vma_use_count) {
1486 ret = -EBUSY;
1487 goto out;
1488 }
1489 }
1490
1491 /* stop streaming */
1492 streaming = gspca_dev->streaming;
1493 if (streaming) {
1494 mutex_lock(&gspca_dev->usb_lock);
1495 gspca_dev->usb_err = 0;
1496 gspca_stream_off(gspca_dev);
1497 mutex_unlock(&gspca_dev->usb_lock);
1498 }
1499
1500 /* free the previous allocated buffers, if any */
1501 if (gspca_dev->nframes != 0) {
1502 frame_free(gspca_dev);
1503 gspca_dev->capt_file = NULL;
1504 }
1505 if (rb->count == 0) /* unrequest */
1506 goto out;
1507 gspca_dev->memory = rb->memory;
1508 ret = frame_alloc(gspca_dev, rb->count);
1509 if (ret == 0) {
1510 rb->count = gspca_dev->nframes;
1511 gspca_dev->capt_file = file;
1512 if (streaming)
1513 ret = gspca_init_transfer(gspca_dev);
1514 }
1515 out:
1516 mutex_unlock(&gspca_dev->queue_lock);
1517 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1518 return ret;
1519 }
1520
1521 static int vidioc_querybuf(struct file *file, void *priv,
1522 struct v4l2_buffer *v4l2_buf)
1523 {
1524 struct gspca_dev *gspca_dev = priv;
1525 struct gspca_frame *frame;
1526
1527 if (v4l2_buf->index < 0
1528 || v4l2_buf->index >= gspca_dev->nframes)
1529 return -EINVAL;
1530
1531 frame = &gspca_dev->frame[v4l2_buf->index];
1532 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1533 return 0;
1534 }
1535
1536 static int vidioc_streamon(struct file *file, void *priv,
1537 enum v4l2_buf_type buf_type)
1538 {
1539 struct gspca_dev *gspca_dev = priv;
1540 int ret;
1541
1542 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1543 return -EINVAL;
1544 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1545 return -ERESTARTSYS;
1546
1547 /* check the capture file */
1548 if (gspca_dev->capt_file != file) {
1549 ret = -EBUSY;
1550 goto out;
1551 }
1552
1553 if (gspca_dev->nframes == 0
1554 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
1555 ret = -EINVAL;
1556 goto out;
1557 }
1558 if (!gspca_dev->streaming) {
1559 ret = gspca_init_transfer(gspca_dev);
1560 if (ret < 0)
1561 goto out;
1562 }
1563 #ifdef GSPCA_DEBUG
1564 if (gspca_debug & D_STREAM) {
1565 PDEBUG_MODE("stream on OK",
1566 gspca_dev->pixfmt,
1567 gspca_dev->width,
1568 gspca_dev->height);
1569 }
1570 #endif
1571 ret = 0;
1572 out:
1573 mutex_unlock(&gspca_dev->queue_lock);
1574 return ret;
1575 }
1576
1577 static int vidioc_streamoff(struct file *file, void *priv,
1578 enum v4l2_buf_type buf_type)
1579 {
1580 struct gspca_dev *gspca_dev = priv;
1581 int ret;
1582
1583 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1584 return -EINVAL;
1585 if (!gspca_dev->streaming)
1586 return 0;
1587 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1588 return -ERESTARTSYS;
1589
1590 /* check the capture file */
1591 if (gspca_dev->capt_file != file) {
1592 ret = -EBUSY;
1593 goto out;
1594 }
1595
1596 /* stop streaming */
1597 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1598 ret = -ERESTARTSYS;
1599 goto out;
1600 }
1601 gspca_dev->usb_err = 0;
1602 gspca_stream_off(gspca_dev);
1603 mutex_unlock(&gspca_dev->usb_lock);
1604
1605 /* empty the transfer queues */
1606 atomic_set(&gspca_dev->fr_q, 0);
1607 atomic_set(&gspca_dev->fr_i, 0);
1608 gspca_dev->fr_o = 0;
1609 ret = 0;
1610 out:
1611 mutex_unlock(&gspca_dev->queue_lock);
1612 return ret;
1613 }
1614
1615 static int vidioc_g_jpegcomp(struct file *file, void *priv,
1616 struct v4l2_jpegcompression *jpegcomp)
1617 {
1618 struct gspca_dev *gspca_dev = priv;
1619 int ret;
1620
1621 if (!gspca_dev->sd_desc->get_jcomp)
1622 return -EINVAL;
1623 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1624 return -ERESTARTSYS;
1625 gspca_dev->usb_err = 0;
1626 if (gspca_dev->present)
1627 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1628 else
1629 ret = -ENODEV;
1630 mutex_unlock(&gspca_dev->usb_lock);
1631 return ret;
1632 }
1633
1634 static int vidioc_s_jpegcomp(struct file *file, void *priv,
1635 struct v4l2_jpegcompression *jpegcomp)
1636 {
1637 struct gspca_dev *gspca_dev = priv;
1638 int ret;
1639
1640 if (!gspca_dev->sd_desc->set_jcomp)
1641 return -EINVAL;
1642 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1643 return -ERESTARTSYS;
1644 gspca_dev->usb_err = 0;
1645 if (gspca_dev->present)
1646 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1647 else
1648 ret = -ENODEV;
1649 mutex_unlock(&gspca_dev->usb_lock);
1650 return ret;
1651 }
1652
1653 static int vidioc_g_parm(struct file *filp, void *priv,
1654 struct v4l2_streamparm *parm)
1655 {
1656 struct gspca_dev *gspca_dev = priv;
1657
1658 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1659
1660 if (gspca_dev->sd_desc->get_streamparm) {
1661 int ret;
1662
1663 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1664 return -ERESTARTSYS;
1665 gspca_dev->usb_err = 0;
1666 if (gspca_dev->present)
1667 ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
1668 parm);
1669 else
1670 ret = -ENODEV;
1671 mutex_unlock(&gspca_dev->usb_lock);
1672 return ret;
1673 }
1674
1675 return 0;
1676 }
1677
1678 static int vidioc_s_parm(struct file *filp, void *priv,
1679 struct v4l2_streamparm *parm)
1680 {
1681 struct gspca_dev *gspca_dev = priv;
1682 int n;
1683
1684 n = parm->parm.capture.readbuffers;
1685 if (n == 0 || n >= GSPCA_MAX_FRAMES)
1686 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1687 else
1688 gspca_dev->nbufread = n;
1689
1690 if (gspca_dev->sd_desc->set_streamparm) {
1691 int ret;
1692
1693 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1694 return -ERESTARTSYS;
1695 gspca_dev->usb_err = 0;
1696 if (gspca_dev->present)
1697 ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
1698 parm);
1699 else
1700 ret = -ENODEV;
1701 mutex_unlock(&gspca_dev->usb_lock);
1702 return ret;
1703 }
1704
1705 return 0;
1706 }
1707
1708 static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1709 {
1710 struct gspca_dev *gspca_dev = file->private_data;
1711 struct gspca_frame *frame;
1712 struct page *page;
1713 unsigned long addr, start, size;
1714 int i, ret;
1715
1716 start = vma->vm_start;
1717 size = vma->vm_end - vma->vm_start;
1718 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1719
1720 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1721 return -ERESTARTSYS;
1722 if (!gspca_dev->present) {
1723 ret = -ENODEV;
1724 goto out;
1725 }
1726 if (gspca_dev->capt_file != file) {
1727 ret = -EINVAL;
1728 goto out;
1729 }
1730
1731 frame = NULL;
1732 for (i = 0; i < gspca_dev->nframes; ++i) {
1733 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1734 PDEBUG(D_STREAM, "mmap bad memory type");
1735 break;
1736 }
1737 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1738 == vma->vm_pgoff) {
1739 frame = &gspca_dev->frame[i];
1740 break;
1741 }
1742 }
1743 if (frame == NULL) {
1744 PDEBUG(D_STREAM, "mmap no frame buffer found");
1745 ret = -EINVAL;
1746 goto out;
1747 }
1748 if (size != frame->v4l2_buf.length) {
1749 PDEBUG(D_STREAM, "mmap bad size");
1750 ret = -EINVAL;
1751 goto out;
1752 }
1753
1754 /*
1755 * - VM_IO marks the area as being a mmaped region for I/O to a
1756 * device. It also prevents the region from being core dumped.
1757 */
1758 vma->vm_flags |= VM_IO;
1759
1760 addr = (unsigned long) frame->data;
1761 while (size > 0) {
1762 page = vmalloc_to_page((void *) addr);
1763 ret = vm_insert_page(vma, start, page);
1764 if (ret < 0)
1765 goto out;
1766 start += PAGE_SIZE;
1767 addr += PAGE_SIZE;
1768 size -= PAGE_SIZE;
1769 }
1770
1771 vma->vm_ops = &gspca_vm_ops;
1772 vma->vm_private_data = frame;
1773 gspca_vm_open(vma);
1774 ret = 0;
1775 out:
1776 mutex_unlock(&gspca_dev->queue_lock);
1777 return ret;
1778 }
1779
1780 /*
1781 * wait for a video frame
1782 *
1783 * If a frame is ready, its index is returned.
1784 */
1785 static int frame_wait(struct gspca_dev *gspca_dev,
1786 int nonblock_ing)
1787 {
1788 int i, ret;
1789
1790 /* check if a frame is ready */
1791 i = gspca_dev->fr_o;
1792 if (i == atomic_read(&gspca_dev->fr_i)) {
1793 if (nonblock_ing)
1794 return -EAGAIN;
1795
1796 /* wait till a frame is ready */
1797 ret = wait_event_interruptible_timeout(gspca_dev->wq,
1798 i != atomic_read(&gspca_dev->fr_i) ||
1799 !gspca_dev->streaming || !gspca_dev->present,
1800 msecs_to_jiffies(3000));
1801 if (ret < 0)
1802 return ret;
1803 if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present)
1804 return -EIO;
1805 }
1806
1807 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
1808
1809 if (gspca_dev->sd_desc->dq_callback) {
1810 mutex_lock(&gspca_dev->usb_lock);
1811 gspca_dev->usb_err = 0;
1812 if (gspca_dev->present)
1813 gspca_dev->sd_desc->dq_callback(gspca_dev);
1814 mutex_unlock(&gspca_dev->usb_lock);
1815 }
1816 return gspca_dev->fr_queue[i];
1817 }
1818
1819 /*
1820 * dequeue a video buffer
1821 *
1822 * If nonblock_ing is false, block until a buffer is available.
1823 */
1824 static int vidioc_dqbuf(struct file *file, void *priv,
1825 struct v4l2_buffer *v4l2_buf)
1826 {
1827 struct gspca_dev *gspca_dev = priv;
1828 struct gspca_frame *frame;
1829 int i, ret;
1830
1831 PDEBUG(D_FRAM, "dqbuf");
1832 if (v4l2_buf->memory != gspca_dev->memory)
1833 return -EINVAL;
1834
1835 if (!gspca_dev->present)
1836 return -ENODEV;
1837
1838 /* if not streaming, be sure the application will not loop forever */
1839 if (!(file->f_flags & O_NONBLOCK)
1840 && !gspca_dev->streaming && gspca_dev->users == 1)
1841 return -EINVAL;
1842
1843 /* only the capturing file may dequeue */
1844 if (gspca_dev->capt_file != file)
1845 return -EINVAL;
1846
1847 /* only one dequeue / read at a time */
1848 if (mutex_lock_interruptible(&gspca_dev->read_lock))
1849 return -ERESTARTSYS;
1850
1851 ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
1852 if (ret < 0)
1853 goto out;
1854 i = ret; /* frame index */
1855 frame = &gspca_dev->frame[i];
1856 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
1857 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
1858 frame->data,
1859 frame->v4l2_buf.bytesused)) {
1860 PDEBUG(D_ERR|D_STREAM,
1861 "dqbuf cp to user failed");
1862 ret = -EFAULT;
1863 goto out;
1864 }
1865 }
1866 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1867 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1868 PDEBUG(D_FRAM, "dqbuf %d", i);
1869 ret = 0;
1870 out:
1871 mutex_unlock(&gspca_dev->read_lock);
1872 return ret;
1873 }
1874
1875 /*
1876 * queue a video buffer
1877 *
1878 * Attempting to queue a buffer that has already been
1879 * queued will return -EINVAL.
1880 */
1881 static int vidioc_qbuf(struct file *file, void *priv,
1882 struct v4l2_buffer *v4l2_buf)
1883 {
1884 struct gspca_dev *gspca_dev = priv;
1885 struct gspca_frame *frame;
1886 int i, index, ret;
1887
1888 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
1889
1890 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1891 return -ERESTARTSYS;
1892
1893 index = v4l2_buf->index;
1894 if ((unsigned) index >= gspca_dev->nframes) {
1895 PDEBUG(D_FRAM,
1896 "qbuf idx %d >= %d", index, gspca_dev->nframes);
1897 ret = -EINVAL;
1898 goto out;
1899 }
1900 if (v4l2_buf->memory != gspca_dev->memory) {
1901 PDEBUG(D_FRAM, "qbuf bad memory type");
1902 ret = -EINVAL;
1903 goto out;
1904 }
1905
1906 frame = &gspca_dev->frame[index];
1907 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1908 PDEBUG(D_FRAM, "qbuf bad state");
1909 ret = -EINVAL;
1910 goto out;
1911 }
1912
1913 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
1914
1915 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
1916 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
1917 frame->v4l2_buf.length = v4l2_buf->length;
1918 }
1919
1920 /* put the buffer in the 'queued' queue */
1921 i = atomic_read(&gspca_dev->fr_q);
1922 gspca_dev->fr_queue[i] = index;
1923 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
1924
1925 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
1926 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
1927 ret = 0;
1928 out:
1929 mutex_unlock(&gspca_dev->queue_lock);
1930 return ret;
1931 }
1932
1933 /*
1934 * allocate the resources for read()
1935 */
1936 static int read_alloc(struct gspca_dev *gspca_dev,
1937 struct file *file)
1938 {
1939 struct v4l2_buffer v4l2_buf;
1940 int i, ret;
1941
1942 PDEBUG(D_STREAM, "read alloc");
1943 if (gspca_dev->nframes == 0) {
1944 struct v4l2_requestbuffers rb;
1945
1946 memset(&rb, 0, sizeof rb);
1947 rb.count = gspca_dev->nbufread;
1948 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1949 rb.memory = GSPCA_MEMORY_READ;
1950 ret = vidioc_reqbufs(file, gspca_dev, &rb);
1951 if (ret != 0) {
1952 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
1953 return ret;
1954 }
1955 memset(&v4l2_buf, 0, sizeof v4l2_buf);
1956 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1957 v4l2_buf.memory = GSPCA_MEMORY_READ;
1958 for (i = 0; i < gspca_dev->nbufread; i++) {
1959 v4l2_buf.index = i;
1960 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1961 if (ret != 0) {
1962 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
1963 return ret;
1964 }
1965 }
1966 gspca_dev->memory = GSPCA_MEMORY_READ;
1967 }
1968
1969 /* start streaming */
1970 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
1971 if (ret != 0)
1972 PDEBUG(D_STREAM, "read streamon err %d", ret);
1973 return ret;
1974 }
1975
1976 static unsigned int dev_poll(struct file *file, poll_table *wait)
1977 {
1978 struct gspca_dev *gspca_dev = file->private_data;
1979 int ret;
1980
1981 PDEBUG(D_FRAM, "poll");
1982
1983 poll_wait(file, &gspca_dev->wq, wait);
1984
1985 /* if reqbufs is not done, the user would use read() */
1986 if (gspca_dev->nframes == 0) {
1987 if (gspca_dev->memory != GSPCA_MEMORY_NO)
1988 return POLLERR; /* not the 1st time */
1989 ret = read_alloc(gspca_dev, file);
1990 if (ret != 0)
1991 return POLLERR;
1992 }
1993
1994 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
1995 return POLLERR;
1996
1997 /* check if an image has been received */
1998 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
1999 ret = POLLIN | POLLRDNORM; /* yes */
2000 else
2001 ret = 0;
2002 mutex_unlock(&gspca_dev->queue_lock);
2003 if (!gspca_dev->present)
2004 return POLLHUP;
2005 return ret;
2006 }
2007
2008 static ssize_t dev_read(struct file *file, char __user *data,
2009 size_t count, loff_t *ppos)
2010 {
2011 struct gspca_dev *gspca_dev = file->private_data;
2012 struct gspca_frame *frame;
2013 struct v4l2_buffer v4l2_buf;
2014 struct timeval timestamp;
2015 int n, ret, ret2;
2016
2017 PDEBUG(D_FRAM, "read (%zd)", count);
2018 if (!gspca_dev->present)
2019 return -ENODEV;
2020 switch (gspca_dev->memory) {
2021 case GSPCA_MEMORY_NO: /* first time */
2022 ret = read_alloc(gspca_dev, file);
2023 if (ret != 0)
2024 return ret;
2025 break;
2026 case GSPCA_MEMORY_READ:
2027 if (gspca_dev->capt_file == file)
2028 break;
2029 /* fall thru */
2030 default:
2031 return -EINVAL;
2032 }
2033
2034 /* get a frame */
2035 timestamp = ktime_to_timeval(ktime_get());
2036 timestamp.tv_sec--;
2037 n = 2;
2038 for (;;) {
2039 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2040 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2041 v4l2_buf.memory = GSPCA_MEMORY_READ;
2042 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2043 if (ret != 0) {
2044 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2045 return ret;
2046 }
2047
2048 /* if the process slept for more than 1 second,
2049 * get a newer frame */
2050 frame = &gspca_dev->frame[v4l2_buf.index];
2051 if (--n < 0)
2052 break; /* avoid infinite loop */
2053 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2054 break;
2055 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2056 if (ret != 0) {
2057 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2058 return ret;
2059 }
2060 }
2061
2062 /* copy the frame */
2063 if (count > frame->v4l2_buf.bytesused)
2064 count = frame->v4l2_buf.bytesused;
2065 ret = copy_to_user(data, frame->data, count);
2066 if (ret != 0) {
2067 PDEBUG(D_ERR|D_STREAM,
2068 "read cp to user lack %d / %zd", ret, count);
2069 ret = -EFAULT;
2070 goto out;
2071 }
2072 ret = count;
2073 out:
2074 /* in each case, requeue the buffer */
2075 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2076 if (ret2 != 0)
2077 return ret2;
2078 return ret;
2079 }
2080
2081 static struct v4l2_file_operations dev_fops = {
2082 .owner = THIS_MODULE,
2083 .open = dev_open,
2084 .release = dev_close,
2085 .read = dev_read,
2086 .mmap = dev_mmap,
2087 .unlocked_ioctl = video_ioctl2,
2088 .poll = dev_poll,
2089 };
2090
2091 static const struct v4l2_ioctl_ops dev_ioctl_ops = {
2092 .vidioc_querycap = vidioc_querycap,
2093 .vidioc_dqbuf = vidioc_dqbuf,
2094 .vidioc_qbuf = vidioc_qbuf,
2095 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2096 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2097 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2098 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2099 .vidioc_streamon = vidioc_streamon,
2100 .vidioc_queryctrl = vidioc_queryctrl,
2101 .vidioc_g_ctrl = vidioc_g_ctrl,
2102 .vidioc_s_ctrl = vidioc_s_ctrl,
2103 .vidioc_querymenu = vidioc_querymenu,
2104 .vidioc_enum_input = vidioc_enum_input,
2105 .vidioc_g_input = vidioc_g_input,
2106 .vidioc_s_input = vidioc_s_input,
2107 .vidioc_reqbufs = vidioc_reqbufs,
2108 .vidioc_querybuf = vidioc_querybuf,
2109 .vidioc_streamoff = vidioc_streamoff,
2110 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2111 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2112 .vidioc_g_parm = vidioc_g_parm,
2113 .vidioc_s_parm = vidioc_s_parm,
2114 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2115 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
2116 #ifdef CONFIG_VIDEO_ADV_DEBUG
2117 .vidioc_g_register = vidioc_g_register,
2118 .vidioc_s_register = vidioc_s_register,
2119 #endif
2120 .vidioc_g_chip_ident = vidioc_g_chip_ident,
2121 };
2122
2123 static struct video_device gspca_template = {
2124 .name = "gspca main driver",
2125 .fops = &dev_fops,
2126 .ioctl_ops = &dev_ioctl_ops,
2127 .release = gspca_release,
2128 };
2129
2130 /*
2131 * probe and create a new gspca device
2132 *
2133 * This function must be called by the sub-driver when it is
2134 * called for probing a new device.
2135 */
2136 int gspca_dev_probe2(struct usb_interface *intf,
2137 const struct usb_device_id *id,
2138 const struct sd_desc *sd_desc,
2139 int dev_size,
2140 struct module *module)
2141 {
2142 struct gspca_dev *gspca_dev;
2143 struct usb_device *dev = interface_to_usbdev(intf);
2144 int ret;
2145
2146 PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
2147
2148 /* create the device */
2149 if (dev_size < sizeof *gspca_dev)
2150 dev_size = sizeof *gspca_dev;
2151 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
2152 if (!gspca_dev) {
2153 err("couldn't kzalloc gspca struct");
2154 return -ENOMEM;
2155 }
2156 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2157 if (!gspca_dev->usb_buf) {
2158 err("out of memory");
2159 ret = -ENOMEM;
2160 goto out;
2161 }
2162 gspca_dev->dev = dev;
2163 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
2164 gspca_dev->nbalt = intf->num_altsetting;
2165
2166 /* check if any audio device */
2167 if (dev->config->desc.bNumInterfaces != 1) {
2168 int i;
2169 struct usb_interface *intf2;
2170
2171 for (i = 0; i < dev->config->desc.bNumInterfaces; i++) {
2172 intf2 = dev->config->interface[i];
2173 if (intf2 != NULL
2174 && intf2->altsetting != NULL
2175 && intf2->altsetting->desc.bInterfaceClass ==
2176 USB_CLASS_AUDIO) {
2177 gspca_dev->audio = 1;
2178 break;
2179 }
2180 }
2181 }
2182
2183 gspca_dev->sd_desc = sd_desc;
2184 gspca_dev->nbufread = 2;
2185 gspca_dev->empty_packet = -1; /* don't check the empty packets */
2186
2187 /* configure the subdriver and initialize the USB device */
2188 ret = sd_desc->config(gspca_dev, id);
2189 if (ret < 0)
2190 goto out;
2191 ret = sd_desc->init(gspca_dev);
2192 if (ret < 0)
2193 goto out;
2194 gspca_set_default_mode(gspca_dev);
2195
2196 ret = gspca_input_connect(gspca_dev);
2197 if (ret)
2198 goto out;
2199
2200 mutex_init(&gspca_dev->usb_lock);
2201 mutex_init(&gspca_dev->read_lock);
2202 mutex_init(&gspca_dev->queue_lock);
2203 init_waitqueue_head(&gspca_dev->wq);
2204
2205 /* init video stuff */
2206 memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
2207 gspca_dev->vdev.parent = &intf->dev;
2208 gspca_dev->module = module;
2209 gspca_dev->present = 1;
2210 ret = video_register_device(&gspca_dev->vdev,
2211 VFL_TYPE_GRABBER,
2212 -1);
2213 if (ret < 0) {
2214 err("video_register_device err %d", ret);
2215 goto out;
2216 }
2217
2218 usb_set_intfdata(intf, gspca_dev);
2219 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
2220
2221 gspca_input_create_urb(gspca_dev);
2222
2223 return 0;
2224 out:
2225 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
2226 if (gspca_dev->input_dev)
2227 input_unregister_device(gspca_dev->input_dev);
2228 #endif
2229 kfree(gspca_dev->usb_buf);
2230 kfree(gspca_dev);
2231 return ret;
2232 }
2233 EXPORT_SYMBOL(gspca_dev_probe2);
2234
2235 /* same function as the previous one, but check the interface */
2236 int gspca_dev_probe(struct usb_interface *intf,
2237 const struct usb_device_id *id,
2238 const struct sd_desc *sd_desc,
2239 int dev_size,
2240 struct module *module)
2241 {
2242 struct usb_device *dev = interface_to_usbdev(intf);
2243
2244 /* we don't handle multi-config cameras */
2245 if (dev->descriptor.bNumConfigurations != 1) {
2246 PDEBUG(D_ERR, "%04x:%04x too many config",
2247 id->idVendor, id->idProduct);
2248 return -ENODEV;
2249 }
2250
2251 /* the USB video interface must be the first one */
2252 if (dev->config->desc.bNumInterfaces != 1
2253 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
2254 return -ENODEV;
2255
2256 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
2257 }
2258 EXPORT_SYMBOL(gspca_dev_probe);
2259
2260 /*
2261 * USB disconnection
2262 *
2263 * This function must be called by the sub-driver
2264 * when the device disconnects, after the specific resources are freed.
2265 */
2266 void gspca_disconnect(struct usb_interface *intf)
2267 {
2268 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2269 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
2270 struct input_dev *input_dev;
2271 #endif
2272
2273 PDEBUG(D_PROBE, "%s disconnect",
2274 video_device_node_name(&gspca_dev->vdev));
2275 mutex_lock(&gspca_dev->usb_lock);
2276 gspca_dev->present = 0;
2277
2278 if (gspca_dev->streaming) {
2279 destroy_urbs(gspca_dev);
2280 wake_up_interruptible(&gspca_dev->wq);
2281 }
2282
2283 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
2284 gspca_input_destroy_urb(gspca_dev);
2285 input_dev = gspca_dev->input_dev;
2286 if (input_dev) {
2287 gspca_dev->input_dev = NULL;
2288 input_unregister_device(input_dev);
2289 }
2290 #endif
2291
2292 /* the device is freed at exit of this function */
2293 gspca_dev->dev = NULL;
2294 mutex_unlock(&gspca_dev->usb_lock);
2295
2296 usb_set_intfdata(intf, NULL);
2297
2298 /* release the device */
2299 /* (this will call gspca_release() immediatly or on last close) */
2300 video_unregister_device(&gspca_dev->vdev);
2301
2302 /* PDEBUG(D_PROBE, "disconnect complete"); */
2303 }
2304 EXPORT_SYMBOL(gspca_disconnect);
2305
2306 #ifdef CONFIG_PM
2307 int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2308 {
2309 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2310
2311 if (!gspca_dev->streaming)
2312 return 0;
2313 gspca_dev->frozen = 1; /* avoid urb error messages */
2314 if (gspca_dev->sd_desc->stopN)
2315 gspca_dev->sd_desc->stopN(gspca_dev);
2316 destroy_urbs(gspca_dev);
2317 gspca_input_destroy_urb(gspca_dev);
2318 gspca_set_alt0(gspca_dev);
2319 if (gspca_dev->sd_desc->stop0)
2320 gspca_dev->sd_desc->stop0(gspca_dev);
2321 return 0;
2322 }
2323 EXPORT_SYMBOL(gspca_suspend);
2324
2325 int gspca_resume(struct usb_interface *intf)
2326 {
2327 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2328
2329 gspca_dev->frozen = 0;
2330 gspca_dev->sd_desc->init(gspca_dev);
2331 gspca_input_create_urb(gspca_dev);
2332 if (gspca_dev->streaming)
2333 return gspca_init_transfer(gspca_dev);
2334 return 0;
2335 }
2336 EXPORT_SYMBOL(gspca_resume);
2337 #endif
2338 /* -- cam driver utility functions -- */
2339
2340 /* auto gain and exposure algorithm based on the knee algorithm described here:
2341 http://ytse.tricolour.net/docs/LowLightOptimization.html
2342
2343 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2344 where changed. */
2345 int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2346 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2347 {
2348 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2349 const struct ctrl *gain_ctrl = NULL;
2350 const struct ctrl *exposure_ctrl = NULL;
2351 const struct ctrl *autogain_ctrl = NULL;
2352 int retval = 0;
2353
2354 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
2355 if (gspca_dev->ctrl_dis & (1 << i))
2356 continue;
2357 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2358 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2359 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2360 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2361 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2362 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2363 }
2364 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2365 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2366 "on cam without (auto)gain/exposure");
2367 return 0;
2368 }
2369
2370 if (gain_ctrl->get(gspca_dev, &gain) ||
2371 exposure_ctrl->get(gspca_dev, &exposure) ||
2372 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2373 return 0;
2374
2375 orig_gain = gain;
2376 orig_exposure = exposure;
2377
2378 /* If we are of a multiple of deadzone, do multiple steps to reach the
2379 desired lumination fast (with the risc of a slight overshoot) */
2380 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2381
2382 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
2383 avg_lum, desired_avg_lum, steps);
2384
2385 for (i = 0; i < steps; i++) {
2386 if (avg_lum > desired_avg_lum) {
2387 if (gain > gain_knee)
2388 gain--;
2389 else if (exposure > exposure_knee)
2390 exposure--;
2391 else if (gain > gain_ctrl->qctrl.default_value)
2392 gain--;
2393 else if (exposure > exposure_ctrl->qctrl.minimum)
2394 exposure--;
2395 else if (gain > gain_ctrl->qctrl.minimum)
2396 gain--;
2397 else
2398 break;
2399 } else {
2400 if (gain < gain_ctrl->qctrl.default_value)
2401 gain++;
2402 else if (exposure < exposure_knee)
2403 exposure++;
2404 else if (gain < gain_knee)
2405 gain++;
2406 else if (exposure < exposure_ctrl->qctrl.maximum)
2407 exposure++;
2408 else if (gain < gain_ctrl->qctrl.maximum)
2409 gain++;
2410 else
2411 break;
2412 }
2413 }
2414
2415 if (gain != orig_gain) {
2416 gain_ctrl->set(gspca_dev, gain);
2417 retval = 1;
2418 }
2419 if (exposure != orig_exposure) {
2420 exposure_ctrl->set(gspca_dev, exposure);
2421 retval = 1;
2422 }
2423
2424 return retval;
2425 }
2426 EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2427
2428 /* -- module insert / remove -- */
2429 static int __init gspca_init(void)
2430 {
2431 info("main v%d.%d.%d registered",
2432 (DRIVER_VERSION_NUMBER >> 16) & 0xff,
2433 (DRIVER_VERSION_NUMBER >> 8) & 0xff,
2434 DRIVER_VERSION_NUMBER & 0xff);
2435 return 0;
2436 }
2437 static void __exit gspca_exit(void)
2438 {
2439 info("main deregistered");
2440 }
2441
2442 module_init(gspca_init);
2443 module_exit(gspca_exit);
2444
2445 #ifdef GSPCA_DEBUG
2446 module_param_named(debug, gspca_debug, int, 0644);
2447 MODULE_PARM_DESC(debug,
2448 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
2449 " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout"
2450 " 0x0100: v4l2");
2451 #endif
Tomato firmware and modifications.