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V4L/DVB: gspca - main: Change version to 2.9.0.
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / gspca / gspca.c
blob1e24acd4d940a0c8c859ea1cea81edb0cff401de
1 /*
2 * Main USB camera driver
3 *
4 * Copyright (C) 2008-2009 Jean-Francois 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/jiffies.h>
39 #include <media/v4l2-ioctl.h>
40
41 #include "gspca.h"
42
43 #include <linux/input.h>
44 #include <linux/usb/input.h>
45
46 /* global values */
47 #define DEF_NURBS 3 /* default number of URBs */
48 #if DEF_NURBS > MAX_NURBS
49 #error "DEF_NURBS too big"
50 #endif
51
52 MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
53 MODULE_DESCRIPTION("GSPCA USB Camera Driver");
54 MODULE_LICENSE("GPL");
55
56 #define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 9, 0)
57
58 #ifdef GSPCA_DEBUG
59 int gspca_debug = D_ERR | D_PROBE;
60 EXPORT_SYMBOL(gspca_debug);
61
62 static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h)
63 {
64 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
65 PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d",
66 txt,
67 pixfmt & 0xff,
68 (pixfmt >> 8) & 0xff,
69 (pixfmt >> 16) & 0xff,
70 pixfmt >> 24,
71 w, h);
72 } else {
73 PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d",
74 txt,
75 pixfmt,
76 w, h);
77 }
78 }
79 #else
80 #define PDEBUG_MODE(txt, pixfmt, w, h)
81 #endif
82
83 /* specific memory types - !! should be different from V4L2_MEMORY_xxx */
84 #define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
85 #define GSPCA_MEMORY_READ 7
86
87 #define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
88
89 /*
90 * VMA operations.
91 */
92 static void gspca_vm_open(struct vm_area_struct *vma)
93 {
94 struct gspca_frame *frame = vma->vm_private_data;
95
96 frame->vma_use_count++;
97 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
98 }
99
100 static void gspca_vm_close(struct vm_area_struct *vma)
101 {
102 struct gspca_frame *frame = vma->vm_private_data;
103
104 if (--frame->vma_use_count <= 0)
105 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
106 }
107
108 static const struct vm_operations_struct gspca_vm_ops = {
109 .open = gspca_vm_open,
110 .close = gspca_vm_close,
111 };
112
113 /*
114 * Input and interrupt endpoint handling functions
115 */
116 #ifdef CONFIG_INPUT
117 static void int_irq(struct urb *urb)
118 {
119 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
120 int ret;
121
122 ret = urb->status;
123 switch (ret) {
124 case 0:
125 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
126 urb->transfer_buffer, urb->actual_length) < 0) {
127 PDEBUG(D_ERR, "Unknown packet received");
128 }
129 break;
130
131 case -ENOENT:
132 case -ECONNRESET:
133 case -ENODEV:
134 case -ESHUTDOWN:
135 /* Stop is requested either by software or hardware is gone,
136 * keep the ret value non-zero and don't resubmit later.
137 */
138 break;
139
140 default:
141 PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status);
142 urb->status = 0;
143 ret = 0;
144 }
145
146 if (ret == 0) {
147 ret = usb_submit_urb(urb, GFP_ATOMIC);
148 if (ret < 0)
149 PDEBUG(D_ERR, "Resubmit URB failed with error %i", ret);
150 }
151 }
152
153 static int gspca_input_connect(struct gspca_dev *dev)
154 {
155 struct input_dev *input_dev;
156 int err = 0;
157
158 dev->input_dev = NULL;
159 if (dev->sd_desc->int_pkt_scan) {
160 input_dev = input_allocate_device();
161 if (!input_dev)
162 return -ENOMEM;
163
164 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
165 strlcat(dev->phys, "/input0", sizeof(dev->phys));
166
167 input_dev->name = dev->sd_desc->name;
168 input_dev->phys = dev->phys;
169
170 usb_to_input_id(dev->dev, &input_dev->id);
171
172 input_dev->evbit[0] = BIT_MASK(EV_KEY);
173 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
174 input_dev->dev.parent = &dev->dev->dev;
175
176 err = input_register_device(input_dev);
177 if (err) {
178 PDEBUG(D_ERR, "Input device registration failed "
179 "with error %i", err);
180 input_dev->dev.parent = NULL;
181 input_free_device(input_dev);
182 } else {
183 dev->input_dev = input_dev;
184 }
185 } else
186 err = -EINVAL;
187
188 return err;
189 }
190
191 static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
192 struct usb_endpoint_descriptor *ep)
193 {
194 unsigned int buffer_len;
195 int interval;
196 struct urb *urb;
197 struct usb_device *dev;
198 void *buffer = NULL;
199 int ret = -EINVAL;
200
201 buffer_len = ep->wMaxPacketSize;
202 interval = ep->bInterval;
203 PDEBUG(D_PROBE, "found int in endpoint: 0x%x, "
204 "buffer_len=%u, interval=%u",
205 ep->bEndpointAddress, buffer_len, interval);
206
207 dev = gspca_dev->dev;
208
209 urb = usb_alloc_urb(0, GFP_KERNEL);
210 if (!urb) {
211 ret = -ENOMEM;
212 goto error;
213 }
214
215 buffer = usb_buffer_alloc(dev, ep->wMaxPacketSize,
216 GFP_KERNEL, &urb->transfer_dma);
217 if (!buffer) {
218 ret = -ENOMEM;
219 goto error_buffer;
220 }
221 usb_fill_int_urb(urb, dev,
222 usb_rcvintpipe(dev, ep->bEndpointAddress),
223 buffer, buffer_len,
224 int_irq, (void *)gspca_dev, interval);
225 gspca_dev->int_urb = urb;
226 ret = usb_submit_urb(urb, GFP_KERNEL);
227 if (ret < 0) {
228 PDEBUG(D_ERR, "submit URB failed with error %i", ret);
229 goto error_submit;
230 }
231 return ret;
232
233 error_submit:
234 usb_buffer_free(dev,
235 urb->transfer_buffer_length,
236 urb->transfer_buffer,
237 urb->transfer_dma);
238 error_buffer:
239 usb_free_urb(urb);
240 error:
241 return ret;
242 }
243
244 static int gspca_input_create_urb(struct gspca_dev *gspca_dev)
245 {
246 int ret = -EINVAL;
247 struct usb_interface *intf;
248 struct usb_host_interface *intf_desc;
249 struct usb_endpoint_descriptor *ep;
250 int i;
251
252 if (gspca_dev->sd_desc->int_pkt_scan) {
253 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
254 intf_desc = intf->cur_altsetting;
255 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
256 ep = &intf_desc->endpoint[i].desc;
257 if (usb_endpoint_dir_in(ep) &&
258 usb_endpoint_xfer_int(ep)) {
259
260 ret = alloc_and_submit_int_urb(gspca_dev, ep);
261 break;
262 }
263 }
264 }
265 return ret;
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_buffer_free(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 #define gspca_input_connect(gspca_dev) 0
285 #define gspca_input_create_urb(gspca_dev) 0
286 #define gspca_input_destroy_urb(gspca_dev)
287 #endif
288
289 /* get the current input frame buffer */
290 struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev)
291 {
292 struct gspca_frame *frame;
293
294 frame = gspca_dev->cur_frame;
295 if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
296 != V4L2_BUF_FLAG_QUEUED)
297 return NULL;
298 return frame;
299 }
300 EXPORT_SYMBOL(gspca_get_i_frame);
301
302 /*
303 * fill a video frame from an URB and resubmit
304 */
305 static void fill_frame(struct gspca_dev *gspca_dev,
306 struct urb *urb)
307 {
308 u8 *data; /* address of data in the iso message */
309 int i, len, st;
310 cam_pkt_op pkt_scan;
311
312 if (urb->status != 0) {
313 if (urb->status == -ESHUTDOWN)
314 return; /* disconnection */
315 #ifdef CONFIG_PM
316 if (gspca_dev->frozen)
317 return;
318 #endif
319 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
320 urb->status = 0;
321 goto resubmit;
322 }
323 pkt_scan = gspca_dev->sd_desc->pkt_scan;
324 for (i = 0; i < urb->number_of_packets; i++) {
325
326 /* check the packet status and length */
327 len = urb->iso_frame_desc[i].actual_length;
328 if (len == 0) {
329 if (gspca_dev->empty_packet == 0)
330 gspca_dev->empty_packet = 1;
331 continue;
332 }
333 st = urb->iso_frame_desc[i].status;
334 if (st) {
335 PDEBUG(D_ERR,
336 "ISOC data error: [%d] len=%d, status=%d",
337 i, len, st);
338 gspca_dev->last_packet_type = DISCARD_PACKET;
339 continue;
340 }
341
342 /* let the packet be analyzed by the subdriver */
343 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
344 i, urb->iso_frame_desc[i].offset, len);
345 data = (u8 *) urb->transfer_buffer
346 + urb->iso_frame_desc[i].offset;
347 pkt_scan(gspca_dev, data, len);
348 }
349
350 resubmit:
351 /* resubmit the URB */
352 st = usb_submit_urb(urb, GFP_ATOMIC);
353 if (st < 0)
354 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
355 }
356
357 /*
358 * ISOC message interrupt from the USB device
359 *
360 * Analyse each packet and call the subdriver for copy to the frame buffer.
361 */
362 static void isoc_irq(struct urb *urb)
363 {
364 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
365
366 PDEBUG(D_PACK, "isoc irq");
367 if (!gspca_dev->streaming)
368 return;
369 fill_frame(gspca_dev, urb);
370 }
371
372 /*
373 * bulk message interrupt from the USB device
374 */
375 static void bulk_irq(struct urb *urb)
376 {
377 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
378 int st;
379
380 PDEBUG(D_PACK, "bulk irq");
381 if (!gspca_dev->streaming)
382 return;
383 switch (urb->status) {
384 case 0:
385 break;
386 case -ESHUTDOWN:
387 return; /* disconnection */
388 default:
389 #ifdef CONFIG_PM
390 if (gspca_dev->frozen)
391 return;
392 #endif
393 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
394 urb->status = 0;
395 goto resubmit;
396 }
397
398 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
399 gspca_dev->sd_desc->pkt_scan(gspca_dev,
400 urb->transfer_buffer,
401 urb->actual_length);
402
403 resubmit:
404 /* resubmit the URB */
405 if (gspca_dev->cam.bulk_nurbs != 0) {
406 st = usb_submit_urb(urb, GFP_ATOMIC);
407 if (st < 0)
408 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
409 }
410 }
411
412 /*
413 * add data to the current frame
414 *
415 * This function is called by the subdrivers at interrupt level.
416 *
417 * To build a frame, these ones must add
418 * - one FIRST_PACKET
419 * - 0 or many INTER_PACKETs
420 * - one LAST_PACKET
421 * DISCARD_PACKET invalidates the whole frame.
422 * On LAST_PACKET, a new frame is returned.
423 */
424 void gspca_frame_add(struct gspca_dev *gspca_dev,
425 enum gspca_packet_type packet_type,
426 const u8 *data,
427 int len)
428 {
429 struct gspca_frame *frame;
430 int i, j;
431
432 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
433
434 /* check the availability of the frame buffer */
435 frame = gspca_dev->cur_frame;
436 if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
437 != V4L2_BUF_FLAG_QUEUED) {
438 gspca_dev->last_packet_type = DISCARD_PACKET;
439 return;
440 }
441
442 /* when start of a new frame, if the current frame buffer
443 * is not queued, discard the whole frame */
444 if (packet_type == FIRST_PACKET) {
445 frame->data_end = frame->data;
446 jiffies_to_timeval(get_jiffies_64(),
447 &frame->v4l2_buf.timestamp);
448 frame->v4l2_buf.sequence = ++gspca_dev->sequence;
449 } else if (gspca_dev->last_packet_type == DISCARD_PACKET) {
450 if (packet_type == LAST_PACKET)
451 gspca_dev->last_packet_type = packet_type;
452 return;
453 }
454
455 /* append the packet to the frame buffer */
456 if (len > 0) {
457 if (frame->data_end - frame->data + len
458 > frame->v4l2_buf.length) {
459 PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d",
460 frame->data_end - frame->data + len,
461 frame->v4l2_buf.length);
462 packet_type = DISCARD_PACKET;
463 } else {
464 memcpy(frame->data_end, data, len);
465 frame->data_end += len;
466 }
467 }
468 gspca_dev->last_packet_type = packet_type;
469
470 /* if last packet, wake up the application and advance in the queue */
471 if (packet_type == LAST_PACKET) {
472 frame->v4l2_buf.bytesused = frame->data_end - frame->data;
473 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED;
474 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE;
475 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
476 i = (gspca_dev->fr_i + 1) % gspca_dev->nframes;
477 gspca_dev->fr_i = i;
478 PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d",
479 frame->v4l2_buf.bytesused,
480 gspca_dev->fr_q,
481 i,
482 gspca_dev->fr_o);
483 j = gspca_dev->fr_queue[i];
484 gspca_dev->cur_frame = &gspca_dev->frame[j];
485 }
486 }
487 EXPORT_SYMBOL(gspca_frame_add);
488
489 static int gspca_is_compressed(__u32 format)
490 {
491 switch (format) {
492 case V4L2_PIX_FMT_MJPEG:
493 case V4L2_PIX_FMT_JPEG:
494 case V4L2_PIX_FMT_SPCA561:
495 case V4L2_PIX_FMT_PAC207:
496 case V4L2_PIX_FMT_MR97310A:
497 return 1;
498 }
499 return 0;
500 }
501
502 static void *rvmalloc(long size)
503 {
504 void *mem;
505 unsigned long adr;
506
507 mem = vmalloc_32(size);
508 if (mem != NULL) {
509 adr = (unsigned long) mem;
510 while (size > 0) {
511 SetPageReserved(vmalloc_to_page((void *) adr));
512 adr += PAGE_SIZE;
513 size -= PAGE_SIZE;
514 }
515 }
516 return mem;
517 }
518
519 static void rvfree(void *mem, long size)
520 {
521 unsigned long adr;
522
523 adr = (unsigned long) mem;
524 while (size > 0) {
525 ClearPageReserved(vmalloc_to_page((void *) adr));
526 adr += PAGE_SIZE;
527 size -= PAGE_SIZE;
528 }
529 vfree(mem);
530 }
531
532 static int frame_alloc(struct gspca_dev *gspca_dev,
533 unsigned int count)
534 {
535 struct gspca_frame *frame;
536 unsigned int frsz;
537 int i;
538
539 i = gspca_dev->curr_mode;
540 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
541 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
542 frsz = PAGE_ALIGN(frsz);
543 gspca_dev->frsz = frsz;
544 if (count > GSPCA_MAX_FRAMES)
545 count = GSPCA_MAX_FRAMES;
546 gspca_dev->frbuf = rvmalloc(frsz * count);
547 if (!gspca_dev->frbuf) {
548 err("frame alloc failed");
549 return -ENOMEM;
550 }
551 gspca_dev->nframes = count;
552 for (i = 0; i < count; i++) {
553 frame = &gspca_dev->frame[i];
554 frame->v4l2_buf.index = i;
555 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
556 frame->v4l2_buf.flags = 0;
557 frame->v4l2_buf.field = V4L2_FIELD_NONE;
558 frame->v4l2_buf.length = frsz;
559 frame->v4l2_buf.memory = gspca_dev->memory;
560 frame->v4l2_buf.sequence = 0;
561 frame->data = frame->data_end =
562 gspca_dev->frbuf + i * frsz;
563 frame->v4l2_buf.m.offset = i * frsz;
564 }
565 gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
566 gspca_dev->cur_frame = &gspca_dev->frame[0];
567 gspca_dev->last_packet_type = DISCARD_PACKET;
568 gspca_dev->sequence = 0;
569 return 0;
570 }
571
572 static void frame_free(struct gspca_dev *gspca_dev)
573 {
574 int i;
575
576 PDEBUG(D_STREAM, "frame free");
577 if (gspca_dev->frbuf != NULL) {
578 rvfree(gspca_dev->frbuf,
579 gspca_dev->nframes * gspca_dev->frsz);
580 gspca_dev->frbuf = NULL;
581 for (i = 0; i < gspca_dev->nframes; i++)
582 gspca_dev->frame[i].data = NULL;
583 }
584 gspca_dev->nframes = 0;
585 }
586
587 static void destroy_urbs(struct gspca_dev *gspca_dev)
588 {
589 struct urb *urb;
590 unsigned int i;
591
592 PDEBUG(D_STREAM, "kill transfer");
593 for (i = 0; i < MAX_NURBS; i++) {
594 urb = gspca_dev->urb[i];
595 if (urb == NULL)
596 break;
597
598 gspca_dev->urb[i] = NULL;
599 usb_kill_urb(urb);
600 if (urb->transfer_buffer != NULL)
601 usb_buffer_free(gspca_dev->dev,
602 urb->transfer_buffer_length,
603 urb->transfer_buffer,
604 urb->transfer_dma);
605 usb_free_urb(urb);
606 }
607 }
608
609 /*
610 * look for an input transfer endpoint in an alternate setting
611 */
612 static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
613 int xfer)
614 {
615 struct usb_host_endpoint *ep;
616 int i, attr;
617
618 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
619 ep = &alt->endpoint[i];
620 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
621 if (attr == xfer
622 && ep->desc.wMaxPacketSize != 0)
623 return ep;
624 }
625 return NULL;
626 }
627
628 /*
629 * look for an input (isoc or bulk) endpoint
630 *
631 * The endpoint is defined by the subdriver.
632 * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
633 * This routine may be called many times when the bandwidth is too small
634 * (the bandwidth is checked on urb submit).
635 */
636 static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
637 {
638 struct usb_interface *intf;
639 struct usb_host_endpoint *ep;
640 int xfer, i, ret;
641
642 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
643 ep = NULL;
644 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
645 : USB_ENDPOINT_XFER_ISOC;
646 i = gspca_dev->alt; /* previous alt setting */
647 if (gspca_dev->cam.reverse_alts) {
648 while (++i < gspca_dev->nbalt) {
649 ep = alt_xfer(&intf->altsetting[i], xfer);
650 if (ep)
651 break;
652 }
653 } else {
654 while (--i >= 0) {
655 ep = alt_xfer(&intf->altsetting[i], xfer);
656 if (ep)
657 break;
658 }
659 }
660 if (ep == NULL) {
661 err("no transfer endpoint found");
662 return NULL;
663 }
664 PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
665 i, ep->desc.bEndpointAddress);
666 gspca_dev->alt = i; /* memorize the current alt setting */
667 if (gspca_dev->nbalt > 1) {
668 gspca_input_destroy_urb(gspca_dev);
669 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
670 if (ret < 0) {
671 err("set alt %d err %d", i, ret);
672 ep = NULL;
673 }
674 gspca_input_create_urb(gspca_dev);
675 }
676 return ep;
677 }
678
679 /*
680 * create the URBs for image transfer
681 */
682 static int create_urbs(struct gspca_dev *gspca_dev,
683 struct usb_host_endpoint *ep)
684 {
685 struct urb *urb;
686 int n, nurbs, i, psize, npkt, bsize;
687
688 /* calculate the packet size and the number of packets */
689 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
690
691 if (!gspca_dev->cam.bulk) { /* isoc */
692
693 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
694 if (gspca_dev->pkt_size == 0)
695 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
696 else
697 psize = gspca_dev->pkt_size;
698 npkt = gspca_dev->cam.npkt;
699 if (npkt == 0)
700 npkt = 32; /* default value */
701 bsize = psize * npkt;
702 PDEBUG(D_STREAM,
703 "isoc %d pkts size %d = bsize:%d",
704 npkt, psize, bsize);
705 nurbs = DEF_NURBS;
706 } else { /* bulk */
707 npkt = 0;
708 bsize = gspca_dev->cam.bulk_size;
709 if (bsize == 0)
710 bsize = psize;
711 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
712 if (gspca_dev->cam.bulk_nurbs != 0)
713 nurbs = gspca_dev->cam.bulk_nurbs;
714 else
715 nurbs = 1;
716 }
717
718 for (n = 0; n < nurbs; n++) {
719 urb = usb_alloc_urb(npkt, GFP_KERNEL);
720 if (!urb) {
721 err("usb_alloc_urb failed");
722 return -ENOMEM;
723 }
724 gspca_dev->urb[n] = urb;
725 urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev,
726 bsize,
727 GFP_KERNEL,
728 &urb->transfer_dma);
729
730 if (urb->transfer_buffer == NULL) {
731 err("usb_buffer_alloc failed");
732 return -ENOMEM;
733 }
734 urb->dev = gspca_dev->dev;
735 urb->context = gspca_dev;
736 urb->transfer_buffer_length = bsize;
737 if (npkt != 0) { /* ISOC */
738 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
739 ep->desc.bEndpointAddress);
740 urb->transfer_flags = URB_ISO_ASAP
741 | URB_NO_TRANSFER_DMA_MAP;
742 urb->interval = ep->desc.bInterval;
743 urb->complete = isoc_irq;
744 urb->number_of_packets = npkt;
745 for (i = 0; i < npkt; i++) {
746 urb->iso_frame_desc[i].length = psize;
747 urb->iso_frame_desc[i].offset = psize * i;
748 }
749 } else { /* bulk */
750 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
751 ep->desc.bEndpointAddress),
752 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
753 urb->complete = bulk_irq;
754 }
755 }
756 return 0;
757 }
758
759 /*
760 * start the USB transfer
761 */
762 static int gspca_init_transfer(struct gspca_dev *gspca_dev)
763 {
764 struct usb_host_endpoint *ep;
765 struct urb *urb;
766 int n, ret;
767
768 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
769 return -ERESTARTSYS;
770
771 if (!gspca_dev->present) {
772 ret = -ENODEV;
773 goto out;
774 }
775
776 gspca_dev->usb_err = 0;
777
778 /* set the higher alternate setting and
779 * loop until urb submit succeeds */
780 if (gspca_dev->cam.reverse_alts)
781 gspca_dev->alt = 0;
782 else
783 gspca_dev->alt = gspca_dev->nbalt;
784
785 if (gspca_dev->sd_desc->isoc_init) {
786 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
787 if (ret < 0)
788 goto out;
789 }
790 ep = get_ep(gspca_dev);
791 if (ep == NULL) {
792 ret = -EIO;
793 goto out;
794 }
795 for (;;) {
796 if (!gspca_dev->cam.no_urb_create) {
797 PDEBUG(D_STREAM, "init transfer alt %d",
798 gspca_dev->alt);
799 ret = create_urbs(gspca_dev, ep);
800 if (ret < 0) {
801 destroy_urbs(gspca_dev);
802 goto out;
803 }
804 }
805
806 /* clear the bulk endpoint */
807 if (gspca_dev->cam.bulk)
808 usb_clear_halt(gspca_dev->dev,
809 gspca_dev->urb[0]->pipe);
810
811 /* start the cam */
812 ret = gspca_dev->sd_desc->start(gspca_dev);
813 if (ret < 0) {
814 destroy_urbs(gspca_dev);
815 goto out;
816 }
817 gspca_dev->streaming = 1;
818
819 /* some bulk transfers are started by the subdriver */
820 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
821 break;
822
823 /* submit the URBs */
824 for (n = 0; n < MAX_NURBS; n++) {
825 urb = gspca_dev->urb[n];
826 if (urb == NULL)
827 break;
828 ret = usb_submit_urb(urb, GFP_KERNEL);
829 if (ret < 0)
830 break;
831 }
832 if (ret >= 0)
833 break;
834 gspca_dev->streaming = 0;
835 destroy_urbs(gspca_dev);
836 if (ret != -ENOSPC) {
837 PDEBUG(D_ERR|D_STREAM,
838 "usb_submit_urb alt %d err %d",
839 gspca_dev->alt, ret);
840 goto out;
841 }
842
843 /* the bandwidth is not wide enough
844 * negociate or try a lower alternate setting */
845 PDEBUG(D_ERR|D_STREAM,
846 "bandwidth not wide enough - trying again");
847 msleep(20); /* wait for kill complete */
848 if (gspca_dev->sd_desc->isoc_nego) {
849 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
850 if (ret < 0)
851 goto out;
852 } else {
853 ep = get_ep(gspca_dev);
854 if (ep == NULL) {
855 ret = -EIO;
856 goto out;
857 }
858 }
859 }
860 out:
861 mutex_unlock(&gspca_dev->usb_lock);
862 return ret;
863 }
864
865 static int gspca_set_alt0(struct gspca_dev *gspca_dev)
866 {
867 int ret;
868
869 if (gspca_dev->alt == 0)
870 return 0;
871 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
872 if (ret < 0)
873 PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret);
874 return ret;
875 }
876
877 /* Note: both the queue and the usb locks should be held when calling this */
878 static void gspca_stream_off(struct gspca_dev *gspca_dev)
879 {
880 gspca_dev->streaming = 0;
881 if (gspca_dev->present) {
882 if (gspca_dev->sd_desc->stopN)
883 gspca_dev->sd_desc->stopN(gspca_dev);
884 destroy_urbs(gspca_dev);
885 gspca_input_destroy_urb(gspca_dev);
886 gspca_set_alt0(gspca_dev);
887 gspca_input_create_urb(gspca_dev);
888 }
889
890 /* always call stop0 to free the subdriver's resources */
891 if (gspca_dev->sd_desc->stop0)
892 gspca_dev->sd_desc->stop0(gspca_dev);
893 PDEBUG(D_STREAM, "stream off OK");
894 }
895
896 static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
897 {
898 int i;
899
900 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
901 gspca_dev->curr_mode = i;
902 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
903 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
904 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
905 }
906
907 static int wxh_to_mode(struct gspca_dev *gspca_dev,
908 int width, int height)
909 {
910 int i;
911
912 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
913 if (width >= gspca_dev->cam.cam_mode[i].width
914 && height >= gspca_dev->cam.cam_mode[i].height)
915 break;
916 }
917 return i;
918 }
919
920 /*
921 * search a mode with the right pixel format
922 */
923 static int gspca_get_mode(struct gspca_dev *gspca_dev,
924 int mode,
925 int pixfmt)
926 {
927 int modeU, modeD;
928
929 modeU = modeD = mode;
930 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
931 if (--modeD >= 0) {
932 if (gspca_dev->cam.cam_mode[modeD].pixelformat
933 == pixfmt)
934 return modeD;
935 }
936 if (++modeU < gspca_dev->cam.nmodes) {
937 if (gspca_dev->cam.cam_mode[modeU].pixelformat
938 == pixfmt)
939 return modeU;
940 }
941 }
942 return -EINVAL;
943 }
944
945 #ifdef CONFIG_VIDEO_ADV_DEBUG
946 static int vidioc_g_register(struct file *file, void *priv,
947 struct v4l2_dbg_register *reg)
948 {
949 int ret;
950 struct gspca_dev *gspca_dev = priv;
951
952 if (!gspca_dev->sd_desc->get_chip_ident)
953 return -EINVAL;
954
955 if (!gspca_dev->sd_desc->get_register)
956 return -EINVAL;
957
958 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
959 return -ERESTARTSYS;
960 gspca_dev->usb_err = 0;
961 if (gspca_dev->present)
962 ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
963 else
964 ret = -ENODEV;
965 mutex_unlock(&gspca_dev->usb_lock);
966
967 return ret;
968 }
969
970 static int vidioc_s_register(struct file *file, void *priv,
971 struct v4l2_dbg_register *reg)
972 {
973 int ret;
974 struct gspca_dev *gspca_dev = priv;
975
976 if (!gspca_dev->sd_desc->get_chip_ident)
977 return -EINVAL;
978
979 if (!gspca_dev->sd_desc->set_register)
980 return -EINVAL;
981
982 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
983 return -ERESTARTSYS;
984 gspca_dev->usb_err = 0;
985 if (gspca_dev->present)
986 ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
987 else
988 ret = -ENODEV;
989 mutex_unlock(&gspca_dev->usb_lock);
990
991 return ret;
992 }
993 #endif
994
995 static int vidioc_g_chip_ident(struct file *file, void *priv,
996 struct v4l2_dbg_chip_ident *chip)
997 {
998 int ret;
999 struct gspca_dev *gspca_dev = priv;
1000
1001 if (!gspca_dev->sd_desc->get_chip_ident)
1002 return -EINVAL;
1003
1004 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1005 return -ERESTARTSYS;
1006 gspca_dev->usb_err = 0;
1007 if (gspca_dev->present)
1008 ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
1009 else
1010 ret = -ENODEV;
1011 mutex_unlock(&gspca_dev->usb_lock);
1012
1013 return ret;
1014 }
1015
1016 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
1017 struct v4l2_fmtdesc *fmtdesc)
1018 {
1019 struct gspca_dev *gspca_dev = priv;
1020 int i, j, index;
1021 __u32 fmt_tb[8];
1022
1023 /* give an index to each format */
1024 index = 0;
1025 j = 0;
1026 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
1027 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
1028 j = 0;
1029 for (;;) {
1030 if (fmt_tb[j] == fmt_tb[index])
1031 break;
1032 j++;
1033 }
1034 if (j == index) {
1035 if (fmtdesc->index == index)
1036 break; /* new format */
1037 index++;
1038 if (index >= ARRAY_SIZE(fmt_tb))
1039 return -EINVAL;
1040 }
1041 }
1042 if (i < 0)
1043 return -EINVAL; /* no more format */
1044
1045 fmtdesc->pixelformat = fmt_tb[index];
1046 if (gspca_is_compressed(fmt_tb[index]))
1047 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1048 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1049 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1050 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1051 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1052 fmtdesc->description[4] = '\0';
1053 return 0;
1054 }
1055
1056 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
1057 struct v4l2_format *fmt)
1058 {
1059 struct gspca_dev *gspca_dev = priv;
1060 int mode;
1061
1062 mode = gspca_dev->curr_mode;
1063 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1064 sizeof fmt->fmt.pix);
1065 return 0;
1066 }
1067
1068 static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
1069 struct v4l2_format *fmt)
1070 {
1071 int w, h, mode, mode2;
1072
1073 w = fmt->fmt.pix.width;
1074 h = fmt->fmt.pix.height;
1075
1076 #ifdef GSPCA_DEBUG
1077 if (gspca_debug & D_CONF)
1078 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1079 #endif
1080 /* search the closest mode for width and height */
1081 mode = wxh_to_mode(gspca_dev, w, h);
1082
1083 /* OK if right palette */
1084 if (gspca_dev->cam.cam_mode[mode].pixelformat
1085 != fmt->fmt.pix.pixelformat) {
1086
1087 /* else, search the closest mode with the same pixel format */
1088 mode2 = gspca_get_mode(gspca_dev, mode,
1089 fmt->fmt.pix.pixelformat);
1090 if (mode2 >= 0)
1091 mode = mode2;
1092 /* else
1093 ; * no chance, return this mode */
1094 }
1095 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1096 sizeof fmt->fmt.pix);
1097 return mode; /* used when s_fmt */
1098 }
1099
1100 static int vidioc_try_fmt_vid_cap(struct file *file,
1101 void *priv,
1102 struct v4l2_format *fmt)
1103 {
1104 struct gspca_dev *gspca_dev = priv;
1105 int ret;
1106
1107 ret = try_fmt_vid_cap(gspca_dev, fmt);
1108 if (ret < 0)
1109 return ret;
1110 return 0;
1111 }
1112
1113 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
1114 struct v4l2_format *fmt)
1115 {
1116 struct gspca_dev *gspca_dev = priv;
1117 int ret;
1118
1119 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1120 return -ERESTARTSYS;
1121
1122 ret = try_fmt_vid_cap(gspca_dev, fmt);
1123 if (ret < 0)
1124 goto out;
1125
1126 if (gspca_dev->nframes != 0
1127 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1128 ret = -EINVAL;
1129 goto out;
1130 }
1131
1132 if (ret == gspca_dev->curr_mode) {
1133 ret = 0;
1134 goto out; /* same mode */
1135 }
1136
1137 if (gspca_dev->streaming) {
1138 ret = -EBUSY;
1139 goto out;
1140 }
1141 gspca_dev->width = fmt->fmt.pix.width;
1142 gspca_dev->height = fmt->fmt.pix.height;
1143 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1144 gspca_dev->curr_mode = ret;
1145
1146 ret = 0;
1147 out:
1148 mutex_unlock(&gspca_dev->queue_lock);
1149 return ret;
1150 }
1151
1152 static int vidioc_enum_framesizes(struct file *file, void *priv,
1153 struct v4l2_frmsizeenum *fsize)
1154 {
1155 struct gspca_dev *gspca_dev = priv;
1156 int i;
1157 __u32 index = 0;
1158
1159 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1160 if (fsize->pixel_format !=
1161 gspca_dev->cam.cam_mode[i].pixelformat)
1162 continue;
1163
1164 if (fsize->index == index) {
1165 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1166 fsize->discrete.width =
1167 gspca_dev->cam.cam_mode[i].width;
1168 fsize->discrete.height =
1169 gspca_dev->cam.cam_mode[i].height;
1170 return 0;
1171 }
1172 index++;
1173 }
1174
1175 return -EINVAL;
1176 }
1177
1178 static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1179 struct v4l2_frmivalenum *fival)
1180 {
1181 struct gspca_dev *gspca_dev = priv;
1182 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1183 __u32 i;
1184
1185 if (gspca_dev->cam.mode_framerates == NULL ||
1186 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1187 return -EINVAL;
1188
1189 if (fival->pixel_format !=
1190 gspca_dev->cam.cam_mode[mode].pixelformat)
1191 return -EINVAL;
1192
1193 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1194 if (fival->index == i) {
1195 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1196 fival->discrete.numerator = 1;
1197 fival->discrete.denominator =
1198 gspca_dev->cam.mode_framerates[mode].rates[i];
1199 return 0;
1200 }
1201 }
1202
1203 return -EINVAL;
1204 }
1205
1206 static void gspca_release(struct video_device *vfd)
1207 {
1208 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
1209
1210 PDEBUG(D_PROBE, "%s released",
1211 video_device_node_name(&gspca_dev->vdev));
1212
1213 kfree(gspca_dev->usb_buf);
1214 kfree(gspca_dev);
1215 }
1216
1217 static int dev_open(struct file *file)
1218 {
1219 struct gspca_dev *gspca_dev;
1220 int ret;
1221
1222 PDEBUG(D_STREAM, "[%s] open", current->comm);
1223 gspca_dev = (struct gspca_dev *) video_devdata(file);
1224 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1225 return -ERESTARTSYS;
1226 if (!gspca_dev->present) {
1227 ret = -ENODEV;
1228 goto out;
1229 }
1230
1231 if (gspca_dev->users > 4) { /* (arbitrary value) */
1232 ret = -EBUSY;
1233 goto out;
1234 }
1235
1236 /* protect the subdriver against rmmod */
1237 if (!try_module_get(gspca_dev->module)) {
1238 ret = -ENODEV;
1239 goto out;
1240 }
1241
1242 gspca_dev->users++;
1243
1244 file->private_data = gspca_dev;
1245 #ifdef GSPCA_DEBUG
1246 /* activate the v4l2 debug */
1247 if (gspca_debug & D_V4L2)
1248 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
1249 | V4L2_DEBUG_IOCTL_ARG;
1250 else
1251 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
1252 | V4L2_DEBUG_IOCTL_ARG);
1253 #endif
1254 ret = 0;
1255 out:
1256 mutex_unlock(&gspca_dev->queue_lock);
1257 if (ret != 0)
1258 PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
1259 else
1260 PDEBUG(D_STREAM, "open done");
1261 return ret;
1262 }
1263
1264 static int dev_close(struct file *file)
1265 {
1266 struct gspca_dev *gspca_dev = file->private_data;
1267
1268 PDEBUG(D_STREAM, "[%s] close", current->comm);
1269 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1270 return -ERESTARTSYS;
1271 gspca_dev->users--;
1272
1273 /* if the file did the capture, free the streaming resources */
1274 if (gspca_dev->capt_file == file) {
1275 if (gspca_dev->streaming) {
1276 mutex_lock(&gspca_dev->usb_lock);
1277 gspca_dev->usb_err = 0;
1278 gspca_stream_off(gspca_dev);
1279 mutex_unlock(&gspca_dev->usb_lock);
1280 }
1281 frame_free(gspca_dev);
1282 gspca_dev->capt_file = NULL;
1283 gspca_dev->memory = GSPCA_MEMORY_NO;
1284 }
1285 file->private_data = NULL;
1286 module_put(gspca_dev->module);
1287 mutex_unlock(&gspca_dev->queue_lock);
1288
1289 PDEBUG(D_STREAM, "close done");
1290
1291 return 0;
1292 }
1293
1294 static int vidioc_querycap(struct file *file, void *priv,
1295 struct v4l2_capability *cap)
1296 {
1297 struct gspca_dev *gspca_dev = priv;
1298 int ret;
1299
1300 /* protect the access to the usb device */
1301 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1302 return -ERESTARTSYS;
1303 if (!gspca_dev->present) {
1304 ret = -ENODEV;
1305 goto out;
1306 }
1307 strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
1308 if (gspca_dev->dev->product != NULL) {
1309 strncpy(cap->card, gspca_dev->dev->product,
1310 sizeof cap->card);
1311 } else {
1312 snprintf(cap->card, sizeof cap->card,
1313 "USB Camera (%04x:%04x)",
1314 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1315 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1316 }
1317 usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info));
1318 cap->version = DRIVER_VERSION_NUMBER;
1319 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
1320 | V4L2_CAP_STREAMING
1321 | V4L2_CAP_READWRITE;
1322 ret = 0;
1323 out:
1324 mutex_unlock(&gspca_dev->usb_lock);
1325 return ret;
1326 }
1327
1328 static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev,
1329 int id)
1330 {
1331 const struct ctrl *ctrls;
1332 int i;
1333
1334 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1335 i < gspca_dev->sd_desc->nctrls;
1336 i++, ctrls++) {
1337 if (gspca_dev->ctrl_dis & (1 << i))
1338 continue;
1339 if (id == ctrls->qctrl.id)
1340 return ctrls;
1341 }
1342 return NULL;
1343 }
1344
1345 static int vidioc_queryctrl(struct file *file, void *priv,
1346 struct v4l2_queryctrl *q_ctrl)
1347 {
1348 struct gspca_dev *gspca_dev = priv;
1349 const struct ctrl *ctrls;
1350 int i;
1351 u32 id;
1352
1353 ctrls = NULL;
1354 id = q_ctrl->id;
1355 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1356 id &= V4L2_CTRL_ID_MASK;
1357 id++;
1358 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
1359 if (gspca_dev->ctrl_dis & (1 << i))
1360 continue;
1361 if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
1362 continue;
1363 if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id
1364 > ctrls->qctrl.id)
1365 continue;
1366 ctrls = &gspca_dev->sd_desc->ctrls[i];
1367 }
1368 if (ctrls == NULL)
1369 return -EINVAL;
1370 } else {
1371 ctrls = get_ctrl(gspca_dev, id);
1372 if (ctrls == NULL)
1373 return -EINVAL;
1374 i = ctrls - gspca_dev->sd_desc->ctrls;
1375 }
1376 memcpy(q_ctrl, ctrls, sizeof *q_ctrl);
1377 if (gspca_dev->ctrl_inac & (1 << i))
1378 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
1379 return 0;
1380 }
1381
1382 static int vidioc_s_ctrl(struct file *file, void *priv,
1383 struct v4l2_control *ctrl)
1384 {
1385 struct gspca_dev *gspca_dev = priv;
1386 const struct ctrl *ctrls;
1387 int ret;
1388
1389 ctrls = get_ctrl(gspca_dev, ctrl->id);
1390 if (ctrls == NULL)
1391 return -EINVAL;
1392
1393 if (ctrl->value < ctrls->qctrl.minimum
1394 || ctrl->value > ctrls->qctrl.maximum)
1395 return -ERANGE;
1396 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1397 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1398 return -ERESTARTSYS;
1399 gspca_dev->usb_err = 0;
1400 if (gspca_dev->present)
1401 ret = ctrls->set(gspca_dev, ctrl->value);
1402 else
1403 ret = -ENODEV;
1404 mutex_unlock(&gspca_dev->usb_lock);
1405 return ret;
1406 }
1407
1408 static int vidioc_g_ctrl(struct file *file, void *priv,
1409 struct v4l2_control *ctrl)
1410 {
1411 struct gspca_dev *gspca_dev = priv;
1412 const struct ctrl *ctrls;
1413 int ret;
1414
1415 ctrls = get_ctrl(gspca_dev, ctrl->id);
1416 if (ctrls == NULL)
1417 return -EINVAL;
1418
1419 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1420 return -ERESTARTSYS;
1421 gspca_dev->usb_err = 0;
1422 if (gspca_dev->present)
1423 ret = ctrls->get(gspca_dev, &ctrl->value);
1424 else
1425 ret = -ENODEV;
1426 mutex_unlock(&gspca_dev->usb_lock);
1427 return ret;
1428 }
1429
1430 /*fixme: have an audio flag in gspca_dev?*/
1431 static int vidioc_s_audio(struct file *file, void *priv,
1432 struct v4l2_audio *audio)
1433 {
1434 if (audio->index != 0)
1435 return -EINVAL;
1436 return 0;
1437 }
1438
1439 static int vidioc_g_audio(struct file *file, void *priv,
1440 struct v4l2_audio *audio)
1441 {
1442 strcpy(audio->name, "Microphone");
1443 return 0;
1444 }
1445
1446 static int vidioc_enumaudio(struct file *file, void *priv,
1447 struct v4l2_audio *audio)
1448 {
1449 if (audio->index != 0)
1450 return -EINVAL;
1451
1452 strcpy(audio->name, "Microphone");
1453 audio->capability = 0;
1454 audio->mode = 0;
1455 return 0;
1456 }
1457
1458 static int vidioc_querymenu(struct file *file, void *priv,
1459 struct v4l2_querymenu *qmenu)
1460 {
1461 struct gspca_dev *gspca_dev = priv;
1462
1463 if (!gspca_dev->sd_desc->querymenu)
1464 return -EINVAL;
1465 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1466 }
1467
1468 static int vidioc_enum_input(struct file *file, void *priv,
1469 struct v4l2_input *input)
1470 {
1471 struct gspca_dev *gspca_dev = priv;
1472
1473 if (input->index != 0)
1474 return -EINVAL;
1475 input->type = V4L2_INPUT_TYPE_CAMERA;
1476 input->status = gspca_dev->cam.input_flags;
1477 strncpy(input->name, gspca_dev->sd_desc->name,
1478 sizeof input->name);
1479 return 0;
1480 }
1481
1482 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1483 {
1484 *i = 0;
1485 return 0;
1486 }
1487
1488 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1489 {
1490 if (i > 0)
1491 return -EINVAL;
1492 return (0);
1493 }
1494
1495 static int vidioc_reqbufs(struct file *file, void *priv,
1496 struct v4l2_requestbuffers *rb)
1497 {
1498 struct gspca_dev *gspca_dev = priv;
1499 int i, ret = 0;
1500
1501 switch (rb->memory) {
1502 case GSPCA_MEMORY_READ: /* (internal call) */
1503 case V4L2_MEMORY_MMAP:
1504 case V4L2_MEMORY_USERPTR:
1505 break;
1506 default:
1507 return -EINVAL;
1508 }
1509 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1510 return -ERESTARTSYS;
1511
1512 if (gspca_dev->memory != GSPCA_MEMORY_NO
1513 && gspca_dev->memory != rb->memory) {
1514 ret = -EBUSY;
1515 goto out;
1516 }
1517
1518 /* only one file may do the capture */
1519 if (gspca_dev->capt_file != NULL
1520 && gspca_dev->capt_file != file) {
1521 ret = -EBUSY;
1522 goto out;
1523 }
1524
1525 /* if allocated, the buffers must not be mapped */
1526 for (i = 0; i < gspca_dev->nframes; i++) {
1527 if (gspca_dev->frame[i].vma_use_count) {
1528 ret = -EBUSY;
1529 goto out;
1530 }
1531 }
1532
1533 /* stop streaming */
1534 if (gspca_dev->streaming) {
1535 mutex_lock(&gspca_dev->usb_lock);
1536 gspca_dev->usb_err = 0;
1537 gspca_stream_off(gspca_dev);
1538 mutex_unlock(&gspca_dev->usb_lock);
1539 }
1540
1541 /* free the previous allocated buffers, if any */
1542 if (gspca_dev->nframes != 0) {
1543 frame_free(gspca_dev);
1544 gspca_dev->capt_file = NULL;
1545 }
1546 if (rb->count == 0) /* unrequest */
1547 goto out;
1548 gspca_dev->memory = rb->memory;
1549 ret = frame_alloc(gspca_dev, rb->count);
1550 if (ret == 0) {
1551 rb->count = gspca_dev->nframes;
1552 gspca_dev->capt_file = file;
1553 }
1554 out:
1555 mutex_unlock(&gspca_dev->queue_lock);
1556 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1557 return ret;
1558 }
1559
1560 static int vidioc_querybuf(struct file *file, void *priv,
1561 struct v4l2_buffer *v4l2_buf)
1562 {
1563 struct gspca_dev *gspca_dev = priv;
1564 struct gspca_frame *frame;
1565
1566 if (v4l2_buf->index < 0
1567 || v4l2_buf->index >= gspca_dev->nframes)
1568 return -EINVAL;
1569
1570 frame = &gspca_dev->frame[v4l2_buf->index];
1571 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1572 return 0;
1573 }
1574
1575 static int vidioc_streamon(struct file *file, void *priv,
1576 enum v4l2_buf_type buf_type)
1577 {
1578 struct gspca_dev *gspca_dev = priv;
1579 int ret;
1580
1581 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1582 return -EINVAL;
1583 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1584 return -ERESTARTSYS;
1585
1586 if (gspca_dev->nframes == 0
1587 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
1588 ret = -EINVAL;
1589 goto out;
1590 }
1591 if (!gspca_dev->streaming) {
1592 ret = gspca_init_transfer(gspca_dev);
1593 if (ret < 0)
1594 goto out;
1595 }
1596 #ifdef GSPCA_DEBUG
1597 if (gspca_debug & D_STREAM) {
1598 PDEBUG_MODE("stream on OK",
1599 gspca_dev->pixfmt,
1600 gspca_dev->width,
1601 gspca_dev->height);
1602 }
1603 #endif
1604 ret = 0;
1605 out:
1606 mutex_unlock(&gspca_dev->queue_lock);
1607 return ret;
1608 }
1609
1610 static int vidioc_streamoff(struct file *file, void *priv,
1611 enum v4l2_buf_type buf_type)
1612 {
1613 struct gspca_dev *gspca_dev = priv;
1614 int i, ret;
1615
1616 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1617 return -EINVAL;
1618 if (!gspca_dev->streaming)
1619 return 0;
1620 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1621 return -ERESTARTSYS;
1622
1623 /* stop streaming */
1624 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1625 ret = -ERESTARTSYS;
1626 goto out;
1627 }
1628 gspca_dev->usb_err = 0;
1629 gspca_stream_off(gspca_dev);
1630 mutex_unlock(&gspca_dev->usb_lock);
1631
1632 /* empty the application queues */
1633 for (i = 0; i < gspca_dev->nframes; i++)
1634 gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
1635 gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
1636 gspca_dev->last_packet_type = DISCARD_PACKET;
1637 gspca_dev->sequence = 0;
1638 ret = 0;
1639 out:
1640 mutex_unlock(&gspca_dev->queue_lock);
1641 return ret;
1642 }
1643
1644 static int vidioc_g_jpegcomp(struct file *file, void *priv,
1645 struct v4l2_jpegcompression *jpegcomp)
1646 {
1647 struct gspca_dev *gspca_dev = priv;
1648 int ret;
1649
1650 if (!gspca_dev->sd_desc->get_jcomp)
1651 return -EINVAL;
1652 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1653 return -ERESTARTSYS;
1654 gspca_dev->usb_err = 0;
1655 if (gspca_dev->present)
1656 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1657 else
1658 ret = -ENODEV;
1659 mutex_unlock(&gspca_dev->usb_lock);
1660 return ret;
1661 }
1662
1663 static int vidioc_s_jpegcomp(struct file *file, void *priv,
1664 struct v4l2_jpegcompression *jpegcomp)
1665 {
1666 struct gspca_dev *gspca_dev = priv;
1667 int ret;
1668
1669 if (!gspca_dev->sd_desc->set_jcomp)
1670 return -EINVAL;
1671 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1672 return -ERESTARTSYS;
1673 gspca_dev->usb_err = 0;
1674 if (gspca_dev->present)
1675 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1676 else
1677 ret = -ENODEV;
1678 mutex_unlock(&gspca_dev->usb_lock);
1679 return ret;
1680 }
1681
1682 static int vidioc_g_parm(struct file *filp, void *priv,
1683 struct v4l2_streamparm *parm)
1684 {
1685 struct gspca_dev *gspca_dev = priv;
1686
1687 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1688
1689 if (gspca_dev->sd_desc->get_streamparm) {
1690 int ret;
1691
1692 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1693 return -ERESTARTSYS;
1694 gspca_dev->usb_err = 0;
1695 if (gspca_dev->present)
1696 ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
1697 parm);
1698 else
1699 ret = -ENODEV;
1700 mutex_unlock(&gspca_dev->usb_lock);
1701 return ret;
1702 }
1703
1704 return 0;
1705 }
1706
1707 static int vidioc_s_parm(struct file *filp, void *priv,
1708 struct v4l2_streamparm *parm)
1709 {
1710 struct gspca_dev *gspca_dev = priv;
1711 int n;
1712
1713 n = parm->parm.capture.readbuffers;
1714 if (n == 0 || n > GSPCA_MAX_FRAMES)
1715 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1716 else
1717 gspca_dev->nbufread = n;
1718
1719 if (gspca_dev->sd_desc->set_streamparm) {
1720 int ret;
1721
1722 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1723 return -ERESTARTSYS;
1724 gspca_dev->usb_err = 0;
1725 if (gspca_dev->present)
1726 ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
1727 parm);
1728 else
1729 ret = -ENODEV;
1730 mutex_unlock(&gspca_dev->usb_lock);
1731 return ret;
1732 }
1733
1734 return 0;
1735 }
1736
1737 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1738 static int vidiocgmbuf(struct file *file, void *priv,
1739 struct video_mbuf *mbuf)
1740 {
1741 struct gspca_dev *gspca_dev = file->private_data;
1742 int i;
1743
1744 PDEBUG(D_STREAM, "cgmbuf");
1745 if (gspca_dev->nframes == 0) {
1746 int ret;
1747
1748 {
1749 struct v4l2_format fmt;
1750
1751 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1752 i = gspca_dev->cam.nmodes - 1; /* highest mode */
1753 fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width;
1754 fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height;
1755 fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24;
1756 ret = vidioc_s_fmt_vid_cap(file, priv, &fmt);
1757 if (ret != 0)
1758 return ret;
1759 }
1760 {
1761 struct v4l2_requestbuffers rb;
1762
1763 memset(&rb, 0, sizeof rb);
1764 rb.count = 4;
1765 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1766 rb.memory = V4L2_MEMORY_MMAP;
1767 ret = vidioc_reqbufs(file, priv, &rb);
1768 if (ret != 0)
1769 return ret;
1770 }
1771 }
1772 mbuf->frames = gspca_dev->nframes;
1773 mbuf->size = gspca_dev->frsz * gspca_dev->nframes;
1774 for (i = 0; i < mbuf->frames; i++)
1775 mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset;
1776 return 0;
1777 }
1778 #endif
1779
1780 static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1781 {
1782 struct gspca_dev *gspca_dev = file->private_data;
1783 struct gspca_frame *frame;
1784 struct page *page;
1785 unsigned long addr, start, size;
1786 int i, ret;
1787
1788 start = vma->vm_start;
1789 size = vma->vm_end - vma->vm_start;
1790 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1791
1792 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1793 return -ERESTARTSYS;
1794 if (!gspca_dev->present) {
1795 ret = -ENODEV;
1796 goto out;
1797 }
1798 if (gspca_dev->capt_file != file) {
1799 ret = -EINVAL;
1800 goto out;
1801 }
1802
1803 frame = NULL;
1804 for (i = 0; i < gspca_dev->nframes; ++i) {
1805 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1806 PDEBUG(D_STREAM, "mmap bad memory type");
1807 break;
1808 }
1809 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1810 == vma->vm_pgoff) {
1811 frame = &gspca_dev->frame[i];
1812 break;
1813 }
1814 }
1815 if (frame == NULL) {
1816 PDEBUG(D_STREAM, "mmap no frame buffer found");
1817 ret = -EINVAL;
1818 goto out;
1819 }
1820 #ifdef CONFIG_VIDEO_V4L1_COMPAT
1821 /* v4l1 maps all the buffers */
1822 if (i != 0
1823 || size != frame->v4l2_buf.length * gspca_dev->nframes)
1824 #endif
1825 if (size != frame->v4l2_buf.length) {
1826 PDEBUG(D_STREAM, "mmap bad size");
1827 ret = -EINVAL;
1828 goto out;
1829 }
1830
1831 /*
1832 * - VM_IO marks the area as being a mmaped region for I/O to a
1833 * device. It also prevents the region from being core dumped.
1834 */
1835 vma->vm_flags |= VM_IO;
1836
1837 addr = (unsigned long) frame->data;
1838 while (size > 0) {
1839 page = vmalloc_to_page((void *) addr);
1840 ret = vm_insert_page(vma, start, page);
1841 if (ret < 0)
1842 goto out;
1843 start += PAGE_SIZE;
1844 addr += PAGE_SIZE;
1845 size -= PAGE_SIZE;
1846 }
1847
1848 vma->vm_ops = &gspca_vm_ops;
1849 vma->vm_private_data = frame;
1850 gspca_vm_open(vma);
1851 ret = 0;
1852 out:
1853 mutex_unlock(&gspca_dev->queue_lock);
1854 return ret;
1855 }
1856
1857 /*
1858 * wait for a video frame
1859 *
1860 * If a frame is ready, its index is returned.
1861 */
1862 static int frame_wait(struct gspca_dev *gspca_dev,
1863 int nonblock_ing)
1864 {
1865 struct gspca_frame *frame;
1866 int i, j, ret;
1867
1868 /* check if a frame is ready */
1869 i = gspca_dev->fr_o;
1870 j = gspca_dev->fr_queue[i];
1871 frame = &gspca_dev->frame[j];
1872
1873 if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) {
1874 if (nonblock_ing)
1875 return -EAGAIN;
1876
1877 /* wait till a frame is ready */
1878 ret = wait_event_interruptible_timeout(gspca_dev->wq,
1879 (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) ||
1880 !gspca_dev->streaming || !gspca_dev->present,
1881 msecs_to_jiffies(3000));
1882 if (ret < 0)
1883 return ret;
1884 if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present)
1885 return -EIO;
1886 }
1887
1888 gspca_dev->fr_o = (i + 1) % gspca_dev->nframes;
1889 PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d",
1890 gspca_dev->fr_q,
1891 gspca_dev->fr_i,
1892 gspca_dev->fr_o);
1893
1894 if (gspca_dev->sd_desc->dq_callback) {
1895 mutex_lock(&gspca_dev->usb_lock);
1896 gspca_dev->usb_err = 0;
1897 if (gspca_dev->present)
1898 gspca_dev->sd_desc->dq_callback(gspca_dev);
1899 mutex_unlock(&gspca_dev->usb_lock);
1900 }
1901 return j;
1902 }
1903
1904 /*
1905 * dequeue a video buffer
1906 *
1907 * If nonblock_ing is false, block until a buffer is available.
1908 */
1909 static int vidioc_dqbuf(struct file *file, void *priv,
1910 struct v4l2_buffer *v4l2_buf)
1911 {
1912 struct gspca_dev *gspca_dev = priv;
1913 struct gspca_frame *frame;
1914 int i, ret;
1915
1916 PDEBUG(D_FRAM, "dqbuf");
1917 if (v4l2_buf->memory != gspca_dev->memory)
1918 return -EINVAL;
1919
1920 if (!gspca_dev->present)
1921 return -ENODEV;
1922
1923 /* if not streaming, be sure the application will not loop forever */
1924 if (!(file->f_flags & O_NONBLOCK)
1925 && !gspca_dev->streaming && gspca_dev->users == 1)
1926 return -EINVAL;
1927
1928 /* only the capturing file may dequeue */
1929 if (gspca_dev->capt_file != file)
1930 return -EINVAL;
1931
1932 /* only one dequeue / read at a time */
1933 if (mutex_lock_interruptible(&gspca_dev->read_lock))
1934 return -ERESTARTSYS;
1935
1936 ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
1937 if (ret < 0)
1938 goto out;
1939 i = ret; /* frame index */
1940 frame = &gspca_dev->frame[i];
1941 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
1942 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
1943 frame->data,
1944 frame->v4l2_buf.bytesused)) {
1945 PDEBUG(D_ERR|D_STREAM,
1946 "dqbuf cp to user failed");
1947 ret = -EFAULT;
1948 goto out;
1949 }
1950 }
1951 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1952 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1953 PDEBUG(D_FRAM, "dqbuf %d", i);
1954 ret = 0;
1955 out:
1956 mutex_unlock(&gspca_dev->read_lock);
1957 return ret;
1958 }
1959
1960 /*
1961 * queue a video buffer
1962 *
1963 * Attempting to queue a buffer that has already been
1964 * queued will return -EINVAL.
1965 */
1966 static int vidioc_qbuf(struct file *file, void *priv,
1967 struct v4l2_buffer *v4l2_buf)
1968 {
1969 struct gspca_dev *gspca_dev = priv;
1970 struct gspca_frame *frame;
1971 int i, index, ret;
1972
1973 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
1974
1975 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1976 return -ERESTARTSYS;
1977
1978 index = v4l2_buf->index;
1979 if ((unsigned) index >= gspca_dev->nframes) {
1980 PDEBUG(D_FRAM,
1981 "qbuf idx %d >= %d", index, gspca_dev->nframes);
1982 ret = -EINVAL;
1983 goto out;
1984 }
1985 if (v4l2_buf->memory != gspca_dev->memory) {
1986 PDEBUG(D_FRAM, "qbuf bad memory type");
1987 ret = -EINVAL;
1988 goto out;
1989 }
1990
1991 frame = &gspca_dev->frame[index];
1992 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1993 PDEBUG(D_FRAM, "qbuf bad state");
1994 ret = -EINVAL;
1995 goto out;
1996 }
1997
1998 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
1999
2000 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
2001 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
2002 frame->v4l2_buf.length = v4l2_buf->length;
2003 }
2004
2005 /* put the buffer in the 'queued' queue */
2006 i = gspca_dev->fr_q;
2007 gspca_dev->fr_queue[i] = index;
2008 if (gspca_dev->fr_i == i)
2009 gspca_dev->cur_frame = frame;
2010 gspca_dev->fr_q = (i + 1) % gspca_dev->nframes;
2011 PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d",
2012 gspca_dev->fr_q,
2013 gspca_dev->fr_i,
2014 gspca_dev->fr_o);
2015
2016 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
2017 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
2018 ret = 0;
2019 out:
2020 mutex_unlock(&gspca_dev->queue_lock);
2021 return ret;
2022 }
2023
2024 /*
2025 * allocate the resources for read()
2026 */
2027 static int read_alloc(struct gspca_dev *gspca_dev,
2028 struct file *file)
2029 {
2030 struct v4l2_buffer v4l2_buf;
2031 int i, ret;
2032
2033 PDEBUG(D_STREAM, "read alloc");
2034 if (gspca_dev->nframes == 0) {
2035 struct v4l2_requestbuffers rb;
2036
2037 memset(&rb, 0, sizeof rb);
2038 rb.count = gspca_dev->nbufread;
2039 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2040 rb.memory = GSPCA_MEMORY_READ;
2041 ret = vidioc_reqbufs(file, gspca_dev, &rb);
2042 if (ret != 0) {
2043 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
2044 return ret;
2045 }
2046 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2047 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2048 v4l2_buf.memory = GSPCA_MEMORY_READ;
2049 for (i = 0; i < gspca_dev->nbufread; i++) {
2050 v4l2_buf.index = i;
2051 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2052 if (ret != 0) {
2053 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
2054 return ret;
2055 }
2056 }
2057 gspca_dev->memory = GSPCA_MEMORY_READ;
2058 }
2059
2060 /* start streaming */
2061 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
2062 if (ret != 0)
2063 PDEBUG(D_STREAM, "read streamon err %d", ret);
2064 return ret;
2065 }
2066
2067 static unsigned int dev_poll(struct file *file, poll_table *wait)
2068 {
2069 struct gspca_dev *gspca_dev = file->private_data;
2070 int i, ret;
2071
2072 PDEBUG(D_FRAM, "poll");
2073
2074 poll_wait(file, &gspca_dev->wq, wait);
2075
2076 /* if reqbufs is not done, the user would use read() */
2077 if (gspca_dev->nframes == 0) {
2078 if (gspca_dev->memory != GSPCA_MEMORY_NO)
2079 return POLLERR; /* not the 1st time */
2080 ret = read_alloc(gspca_dev, file);
2081 if (ret != 0)
2082 return POLLERR;
2083 }
2084
2085 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
2086 return POLLERR;
2087
2088 /* check the next incoming buffer */
2089 i = gspca_dev->fr_o;
2090 i = gspca_dev->fr_queue[i];
2091 if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
2092 ret = POLLIN | POLLRDNORM; /* something to read */
2093 else
2094 ret = 0;
2095 mutex_unlock(&gspca_dev->queue_lock);
2096 if (!gspca_dev->present)
2097 return POLLHUP;
2098 return ret;
2099 }
2100
2101 static ssize_t dev_read(struct file *file, char __user *data,
2102 size_t count, loff_t *ppos)
2103 {
2104 struct gspca_dev *gspca_dev = file->private_data;
2105 struct gspca_frame *frame;
2106 struct v4l2_buffer v4l2_buf;
2107 struct timeval timestamp;
2108 int n, ret, ret2;
2109
2110 PDEBUG(D_FRAM, "read (%zd)", count);
2111 if (!gspca_dev->present)
2112 return -ENODEV;
2113 switch (gspca_dev->memory) {
2114 case GSPCA_MEMORY_NO: /* first time */
2115 ret = read_alloc(gspca_dev, file);
2116 if (ret != 0)
2117 return ret;
2118 break;
2119 case GSPCA_MEMORY_READ:
2120 if (gspca_dev->capt_file == file)
2121 break;
2122 /* fall thru */
2123 default:
2124 return -EINVAL;
2125 }
2126
2127 /* get a frame */
2128 jiffies_to_timeval(get_jiffies_64(), &timestamp);
2129 timestamp.tv_sec--;
2130 n = 2;
2131 for (;;) {
2132 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2133 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
2134 v4l2_buf.memory = GSPCA_MEMORY_READ;
2135 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2136 if (ret != 0) {
2137 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2138 return ret;
2139 }
2140
2141 /* if the process slept for more than 1 second,
2142 * get a newer frame */
2143 frame = &gspca_dev->frame[v4l2_buf.index];
2144 if (--n < 0)
2145 break; /* avoid infinite loop */
2146 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2147 break;
2148 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2149 if (ret != 0) {
2150 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2151 return ret;
2152 }
2153 }
2154
2155 /* copy the frame */
2156 if (count > frame->v4l2_buf.bytesused)
2157 count = frame->v4l2_buf.bytesused;
2158 ret = copy_to_user(data, frame->data, count);
2159 if (ret != 0) {
2160 PDEBUG(D_ERR|D_STREAM,
2161 "read cp to user lack %d / %zd", ret, count);
2162 ret = -EFAULT;
2163 goto out;
2164 }
2165 ret = count;
2166 out:
2167 /* in each case, requeue the buffer */
2168 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2169 if (ret2 != 0)
2170 return ret2;
2171 return ret;
2172 }
2173
2174 static struct v4l2_file_operations dev_fops = {
2175 .owner = THIS_MODULE,
2176 .open = dev_open,
2177 .release = dev_close,
2178 .read = dev_read,
2179 .mmap = dev_mmap,
2180 .unlocked_ioctl = video_ioctl2,
2181 .poll = dev_poll,
2182 };
2183
2184 static const struct v4l2_ioctl_ops dev_ioctl_ops = {
2185 .vidioc_querycap = vidioc_querycap,
2186 .vidioc_dqbuf = vidioc_dqbuf,
2187 .vidioc_qbuf = vidioc_qbuf,
2188 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2189 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2190 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2191 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
2192 .vidioc_streamon = vidioc_streamon,
2193 .vidioc_queryctrl = vidioc_queryctrl,
2194 .vidioc_g_ctrl = vidioc_g_ctrl,
2195 .vidioc_s_ctrl = vidioc_s_ctrl,
2196 .vidioc_g_audio = vidioc_g_audio,
2197 .vidioc_s_audio = vidioc_s_audio,
2198 .vidioc_enumaudio = vidioc_enumaudio,
2199 .vidioc_querymenu = vidioc_querymenu,
2200 .vidioc_enum_input = vidioc_enum_input,
2201 .vidioc_g_input = vidioc_g_input,
2202 .vidioc_s_input = vidioc_s_input,
2203 .vidioc_reqbufs = vidioc_reqbufs,
2204 .vidioc_querybuf = vidioc_querybuf,
2205 .vidioc_streamoff = vidioc_streamoff,
2206 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2207 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2208 .vidioc_g_parm = vidioc_g_parm,
2209 .vidioc_s_parm = vidioc_s_parm,
2210 .vidioc_enum_framesizes = vidioc_enum_framesizes,
2211 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
2212 #ifdef CONFIG_VIDEO_ADV_DEBUG
2213 .vidioc_g_register = vidioc_g_register,
2214 .vidioc_s_register = vidioc_s_register,
2215 #endif
2216 .vidioc_g_chip_ident = vidioc_g_chip_ident,
2217 #ifdef CONFIG_VIDEO_V4L1_COMPAT
2218 .vidiocgmbuf = vidiocgmbuf,
2219 #endif
2220 };
2221
2222 static struct video_device gspca_template = {
2223 .name = "gspca main driver",
2224 .fops = &dev_fops,
2225 .ioctl_ops = &dev_ioctl_ops,
2226 .release = gspca_release,
2227 };
2228
2229 /*
2230 * probe and create a new gspca device
2231 *
2232 * This function must be called by the sub-driver when it is
2233 * called for probing a new device.
2234 */
2235 int gspca_dev_probe(struct usb_interface *intf,
2236 const struct usb_device_id *id,
2237 const struct sd_desc *sd_desc,
2238 int dev_size,
2239 struct module *module)
2240 {
2241 struct usb_interface_descriptor *interface;
2242 struct gspca_dev *gspca_dev;
2243 struct usb_device *dev = interface_to_usbdev(intf);
2244 int ret;
2245
2246 PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
2247
2248 /* we don't handle multi-config cameras */
2249 if (dev->descriptor.bNumConfigurations != 1) {
2250 PDEBUG(D_ERR, "Too many config");
2251 return -ENODEV;
2252 }
2253
2254 /* the USB video interface must be the first one */
2255 interface = &intf->cur_altsetting->desc;
2256 if (dev->config->desc.bNumInterfaces != 1 &&
2257 interface->bInterfaceNumber != 0)
2258 return -ENODEV;
2259
2260 /* create the device */
2261 if (dev_size < sizeof *gspca_dev)
2262 dev_size = sizeof *gspca_dev;
2263 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
2264 if (!gspca_dev) {
2265 err("couldn't kzalloc gspca struct");
2266 return -ENOMEM;
2267 }
2268 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2269 if (!gspca_dev->usb_buf) {
2270 err("out of memory");
2271 ret = -ENOMEM;
2272 goto out;
2273 }
2274 gspca_dev->dev = dev;
2275 gspca_dev->iface = interface->bInterfaceNumber;
2276 gspca_dev->nbalt = intf->num_altsetting;
2277 gspca_dev->sd_desc = sd_desc;
2278 gspca_dev->nbufread = 2;
2279 gspca_dev->empty_packet = -1; /* don't check the empty packets */
2280
2281 /* configure the subdriver and initialize the USB device */
2282 ret = sd_desc->config(gspca_dev, id);
2283 if (ret < 0)
2284 goto out;
2285 ret = sd_desc->init(gspca_dev);
2286 if (ret < 0)
2287 goto out;
2288 gspca_set_default_mode(gspca_dev);
2289
2290 mutex_init(&gspca_dev->usb_lock);
2291 mutex_init(&gspca_dev->read_lock);
2292 mutex_init(&gspca_dev->queue_lock);
2293 init_waitqueue_head(&gspca_dev->wq);
2294
2295 /* init video stuff */
2296 memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
2297 gspca_dev->vdev.parent = &intf->dev;
2298 gspca_dev->module = module;
2299 gspca_dev->present = 1;
2300 ret = video_register_device(&gspca_dev->vdev,
2301 VFL_TYPE_GRABBER,
2302 -1);
2303 if (ret < 0) {
2304 err("video_register_device err %d", ret);
2305 goto out;
2306 }
2307
2308 usb_set_intfdata(intf, gspca_dev);
2309 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
2310
2311 ret = gspca_input_connect(gspca_dev);
2312 if (ret == 0)
2313 ret = gspca_input_create_urb(gspca_dev);
2314
2315 return 0;
2316 out:
2317 kfree(gspca_dev->usb_buf);
2318 kfree(gspca_dev);
2319 return ret;
2320 }
2321 EXPORT_SYMBOL(gspca_dev_probe);
2322
2323 /*
2324 * USB disconnection
2325 *
2326 * This function must be called by the sub-driver
2327 * when the device disconnects, after the specific resources are freed.
2328 */
2329 void gspca_disconnect(struct usb_interface *intf)
2330 {
2331 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2332 struct input_dev *input_dev;
2333
2334 PDEBUG(D_PROBE, "%s disconnect",
2335 video_device_node_name(&gspca_dev->vdev));
2336 mutex_lock(&gspca_dev->usb_lock);
2337 gspca_dev->present = 0;
2338
2339 if (gspca_dev->streaming) {
2340 destroy_urbs(gspca_dev);
2341 wake_up_interruptible(&gspca_dev->wq);
2342 }
2343
2344 gspca_input_destroy_urb(gspca_dev);
2345 input_dev = gspca_dev->input_dev;
2346 if (input_dev) {
2347 gspca_dev->input_dev = NULL;
2348 input_unregister_device(input_dev);
2349 }
2350
2351 /* the device is freed at exit of this function */
2352 gspca_dev->dev = NULL;
2353 mutex_unlock(&gspca_dev->usb_lock);
2354
2355 usb_set_intfdata(intf, NULL);
2356
2357 /* release the device */
2358 /* (this will call gspca_release() immediatly or on last close) */
2359 video_unregister_device(&gspca_dev->vdev);
2360
2361 /* PDEBUG(D_PROBE, "disconnect complete"); */
2362 }
2363 EXPORT_SYMBOL(gspca_disconnect);
2364
2365 #ifdef CONFIG_PM
2366 int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2367 {
2368 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2369
2370 if (!gspca_dev->streaming)
2371 return 0;
2372 gspca_dev->frozen = 1; /* avoid urb error messages */
2373 if (gspca_dev->sd_desc->stopN)
2374 gspca_dev->sd_desc->stopN(gspca_dev);
2375 destroy_urbs(gspca_dev);
2376 gspca_input_destroy_urb(gspca_dev);
2377 gspca_set_alt0(gspca_dev);
2378 if (gspca_dev->sd_desc->stop0)
2379 gspca_dev->sd_desc->stop0(gspca_dev);
2380 return 0;
2381 }
2382 EXPORT_SYMBOL(gspca_suspend);
2383
2384 int gspca_resume(struct usb_interface *intf)
2385 {
2386 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2387
2388 gspca_dev->frozen = 0;
2389 gspca_dev->sd_desc->init(gspca_dev);
2390 gspca_input_create_urb(gspca_dev);
2391 if (gspca_dev->streaming)
2392 return gspca_init_transfer(gspca_dev);
2393 return 0;
2394 }
2395 EXPORT_SYMBOL(gspca_resume);
2396 #endif
2397 /* -- cam driver utility functions -- */
2398
2399 /* auto gain and exposure algorithm based on the knee algorithm described here:
2400 http://ytse.tricolour.net/docs/LowLightOptimization.html
2401
2402 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2403 where changed. */
2404 int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2405 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2406 {
2407 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2408 const struct ctrl *gain_ctrl = NULL;
2409 const struct ctrl *exposure_ctrl = NULL;
2410 const struct ctrl *autogain_ctrl = NULL;
2411 int retval = 0;
2412
2413 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
2414 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2415 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2416 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2417 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2418 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2419 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2420 }
2421 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2422 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2423 "on cam without (auto)gain/exposure");
2424 return 0;
2425 }
2426
2427 if (gain_ctrl->get(gspca_dev, &gain) ||
2428 exposure_ctrl->get(gspca_dev, &exposure) ||
2429 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2430 return 0;
2431
2432 orig_gain = gain;
2433 orig_exposure = exposure;
2434
2435 /* If we are of a multiple of deadzone, do multiple steps to reach the
2436 desired lumination fast (with the risc of a slight overshoot) */
2437 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2438
2439 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
2440 avg_lum, desired_avg_lum, steps);
2441
2442 for (i = 0; i < steps; i++) {
2443 if (avg_lum > desired_avg_lum) {
2444 if (gain > gain_knee)
2445 gain--;
2446 else if (exposure > exposure_knee)
2447 exposure--;
2448 else if (gain > gain_ctrl->qctrl.default_value)
2449 gain--;
2450 else if (exposure > exposure_ctrl->qctrl.minimum)
2451 exposure--;
2452 else if (gain > gain_ctrl->qctrl.minimum)
2453 gain--;
2454 else
2455 break;
2456 } else {
2457 if (gain < gain_ctrl->qctrl.default_value)
2458 gain++;
2459 else if (exposure < exposure_knee)
2460 exposure++;
2461 else if (gain < gain_knee)
2462 gain++;
2463 else if (exposure < exposure_ctrl->qctrl.maximum)
2464 exposure++;
2465 else if (gain < gain_ctrl->qctrl.maximum)
2466 gain++;
2467 else
2468 break;
2469 }
2470 }
2471
2472 if (gain != orig_gain) {
2473 gain_ctrl->set(gspca_dev, gain);
2474 retval = 1;
2475 }
2476 if (exposure != orig_exposure) {
2477 exposure_ctrl->set(gspca_dev, exposure);
2478 retval = 1;
2479 }
2480
2481 return retval;
2482 }
2483 EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2484
2485 /* -- module insert / remove -- */
2486 static int __init gspca_init(void)
2487 {
2488 info("main v%d.%d.%d registered",
2489 (DRIVER_VERSION_NUMBER >> 16) & 0xff,
2490 (DRIVER_VERSION_NUMBER >> 8) & 0xff,
2491 DRIVER_VERSION_NUMBER & 0xff);
2492 return 0;
2493 }
2494 static void __exit gspca_exit(void)
2495 {
2496 info("main deregistered");
2497 }
2498
2499 module_init(gspca_init);
2500 module_exit(gspca_exit);
2501
2502 #ifdef GSPCA_DEBUG
2503 module_param_named(debug, gspca_debug, int, 0644);
2504 MODULE_PARM_DESC(debug,
2505 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
2506 " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout"
2507 " 0x0100: v4l2");
2508 #endif
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree