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V4L/DVB: Fix default state Beholder H6 tuner
[deliverable/linux.git] / drivers / media / video / gspca / gspca.c
CommitLineData
63eb9546
JFM		 1/*
2 * Main USB camera driver
3 *
11bd199a 4 * Copyright (C) 2008-2009 Jean-Francois Moine (http://moinejf.free.fr)
63eb9546 5 *
0274d42e
MN		 6 * Camera button input handling by Márton Németh
7 * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
8 *
63eb9546
JFM		 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>
cf0fe08d 27#include <linux/version.h>
63eb9546
JFM		 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>
956e42d2 35#include <linux/io.h>
63eb9546 36#include <asm/page.h>
956e42d2 37#include <linux/uaccess.h>
2f51d00f 38#include <linux/ktime.h>
35ea11ff 39#include <media/v4l2-ioctl.h>
63eb9546
JFM		 40
41#include "gspca.h"
42
e070bf9e 43#ifdef CONFIG_INPUT
0274d42e
MN		 44#include <linux/input.h>
45#include <linux/usb/input.h>
e070bf9e 46#endif
0274d42e 47
d43fa32f 48/* global values */
8fee8453
JFM		 49#define DEF_NURBS 3 /* default number of URBs */
50#if DEF_NURBS > MAX_NURBS
51#error "DEF_NURBS too big"
52#endif
d43fa32f 53
63eb9546
JFM		 54MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
55MODULE_DESCRIPTION("GSPCA USB Camera Driver");
56MODULE_LICENSE("GPL");
57
55461f4c 58#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 9, 0)
63eb9546 59
335b3f88 60#ifdef GSPCA_DEBUG
63eb9546
JFM		 61int gspca_debug = D_ERR | D_PROBE;
62EXPORT_SYMBOL(gspca_debug);
63
64static 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
77ee3318 85/* specific memory types - !! should be different from V4L2_MEMORY_xxx */
d43fa32f
JFM		 86#define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
87#define GSPCA_MEMORY_READ 7
88
d43fa32f 89#define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
d43fa32f 90
63eb9546
JFM		 91/*
92 * VMA operations.
93 */
94static 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
102static 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
f0f37e2f 110static const struct vm_operations_struct gspca_vm_ops = {
63eb9546
JFM		 111 .open = gspca_vm_open,
112 .close = gspca_vm_close,
113};
114
0274d42e
MN		 115/*
116 * Input and interrupt endpoint handling functions
117 */
118#ifdef CONFIG_INPUT
119static 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
155static 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;
ac82f59f 161 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
0274d42e
MN		 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 }
10ee2402 187 }
0274d42e
MN		 188
189 return err;
190}
191
192static 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 = ep->wMaxPacketSize;
203 interval = ep->bInterval;
204 PDEBUG(D_PROBE, "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_buffer_alloc(dev, ep->wMaxPacketSize,
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 gspca_dev->int_urb = urb;
227 ret = usb_submit_urb(urb, GFP_KERNEL);
228 if (ret < 0) {
229 PDEBUG(D_ERR, "submit URB failed with error %i", ret);
230 goto error_submit;
231 }
232 return ret;
233
234error_submit:
235 usb_buffer_free(dev,
236 urb->transfer_buffer_length,
237 urb->transfer_buffer,
238 urb->transfer_dma);
239error_buffer:
240 usb_free_urb(urb);
241error:
242 return ret;
243}
244
10ee2402 245static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
0274d42e 246{
0274d42e
MN		 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
10ee2402 260 alloc_and_submit_int_urb(gspca_dev, ep);
0274d42e
MN		 261 break;
262 }
263 }
264 }
0274d42e
MN		 265}
266
267static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
268{
269 struct urb *urb;
270
271 urb = gspca_dev->int_urb;
272 if (urb) {
273 gspca_dev->int_urb = NULL;
274 usb_kill_urb(urb);
275 usb_buffer_free(gspca_dev->dev,
276 urb->transfer_buffer_length,
277 urb->transfer_buffer,
278 urb->transfer_dma);
279 usb_free_urb(urb);
280 }
281}
0274d42e
MN		 282#endif
283
1b60e1ad
JFM		 284/* get the current input frame buffer */
285struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev)
286{
287 struct gspca_frame *frame;
1b60e1ad 288
db870875 289 frame = gspca_dev->cur_frame;
1b60e1ad
JFM		 290 if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
291 != V4L2_BUF_FLAG_QUEUED)
292 return NULL;
293 return frame;
294}
295EXPORT_SYMBOL(gspca_get_i_frame);
296
63eb9546 297/*
d43fa32f 298 * fill a video frame from an URB and resubmit
63eb9546 299 */
d43fa32f
JFM		 300static void fill_frame(struct gspca_dev *gspca_dev,
301 struct urb *urb)
63eb9546 302{
8d584a53 303 u8 *data; /* address of data in the iso message */
1b60e1ad 304 int i, len, st;
63eb9546
JFM		 305 cam_pkt_op pkt_scan;
306
6a7eba24 307 if (urb->status != 0) {
090264e5
JFM		 308 if (urb->status == -ESHUTDOWN)
309 return; /* disconnection */
62ee8eee 310#ifdef CONFIG_PM
6a540bdf
HG		 311 if (gspca_dev->frozen)
312 return;
62ee8eee 313#endif
6a540bdf 314 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
8157852f 315 urb->status = 0;
bf926adf 316 goto resubmit;
6a7eba24 317 }
63eb9546
JFM		 318 pkt_scan = gspca_dev->sd_desc->pkt_scan;
319 for (i = 0; i < urb->number_of_packets; i++) {
320
63eb9546
JFM		 321 /* check the packet status and length */
322 len = urb->iso_frame_desc[i].actual_length;
ff374747
JFM		 323 if (len == 0) {
324 if (gspca_dev->empty_packet == 0)
325 gspca_dev->empty_packet = 1;
6a7eba24 326 continue;
ff374747 327 }
63eb9546
JFM		 328 st = urb->iso_frame_desc[i].status;
329 if (st) {
6a7eba24
JFM		 330 PDEBUG(D_ERR,
331 "ISOC data error: [%d] len=%d, status=%d",
63eb9546
JFM		 332 i, len, st);
333 gspca_dev->last_packet_type = DISCARD_PACKET;
334 continue;
335 }
63eb9546
JFM		 336
337 /* let the packet be analyzed by the subdriver */
338 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
339 i, urb->iso_frame_desc[i].offset, len);
8d584a53 340 data = (u8 *) urb->transfer_buffer
63eb9546 341 + urb->iso_frame_desc[i].offset;
76dd272b 342 pkt_scan(gspca_dev, data, len);
63eb9546
JFM		 343 }
344
bf926adf 345resubmit:
63eb9546 346 /* resubmit the URB */
63eb9546
JFM		 347 st = usb_submit_urb(urb, GFP_ATOMIC);
348 if (st < 0)
349 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
350}
351
d43fa32f
JFM		 352/*
353 * ISOC message interrupt from the USB device
354 *
ac0d6df6 355 * Analyse each packet and call the subdriver for copy to the frame buffer.
d43fa32f 356 */
8d584a53 357static void isoc_irq(struct urb *urb)
d43fa32f
JFM		 358{
359 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
360
3647fea8 361 PDEBUG(D_PACK, "isoc irq");
d43fa32f
JFM		 362 if (!gspca_dev->streaming)
363 return;
364 fill_frame(gspca_dev, urb);
365}
366
0be01004
JFM		 367/*
368 * bulk message interrupt from the USB device
369 */
8d584a53 370static void bulk_irq(struct urb *urb)
0be01004
JFM		 371{
372 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
dff369aa 373 int st;
0be01004
JFM		 374
375 PDEBUG(D_PACK, "bulk irq");
376 if (!gspca_dev->streaming)
377 return;
880ae24d
JFM		 378 switch (urb->status) {
379 case 0:
380 break;
090264e5
JFM		 381 case -ESHUTDOWN:
382 return; /* disconnection */
880ae24d 383 default:
0be01004 384#ifdef CONFIG_PM
6a540bdf
HG		 385 if (gspca_dev->frozen)
386 return;
0be01004 387#endif
6a540bdf 388 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
8157852f 389 urb->status = 0;
bf926adf 390 goto resubmit;
0be01004
JFM		 391 }
392
d131c3c9
JFM		 393 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
394 gspca_dev->sd_desc->pkt_scan(gspca_dev,
d131c3c9
JFM		 395 urb->transfer_buffer,
396 urb->actual_length);
dff369aa 397
bf926adf 398resubmit:
dff369aa
AO		 399 /* resubmit the URB */
400 if (gspca_dev->cam.bulk_nurbs != 0) {
401 st = usb_submit_urb(urb, GFP_ATOMIC);
402 if (st < 0)
403 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
404 }
0be01004
JFM		 405}
406
63eb9546
JFM		 407/*
408 * add data to the current frame
409 *
ac0d6df6
JFM		 410 * This function is called by the subdrivers at interrupt level.
411 *
63eb9546
JFM		 412 * To build a frame, these ones must add
413 * - one FIRST_PACKET
414 * - 0 or many INTER_PACKETs
415 * - one LAST_PACKET
416 * DISCARD_PACKET invalidates the whole frame.
417 * On LAST_PACKET, a new frame is returned.
418 */
76dd272b
JFM		 419void gspca_frame_add(struct gspca_dev *gspca_dev,
420 enum gspca_packet_type packet_type,
421 const u8 *data,
422 int len)
63eb9546 423{
3ec342f2 424 struct gspca_frame *frame;
63eb9546
JFM		 425 int i, j;
426
e2997a72 427 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
d131c3c9
JFM		 428
429 /* check the availability of the frame buffer */
3ec342f2 430 frame = gspca_dev->cur_frame;
d131c3c9
JFM		 431 if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
432 != V4L2_BUF_FLAG_QUEUED) {
433 gspca_dev->last_packet_type = DISCARD_PACKET;
76dd272b 434 return;
d131c3c9 435 }
63eb9546
JFM		 436
437 /* when start of a new frame, if the current frame buffer
438 * is not queued, discard the whole frame */
439 if (packet_type == FIRST_PACKET) {
63eb9546 440 frame->data_end = frame->data;
2f51d00f 441 frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
63eb9546 442 frame->v4l2_buf.sequence = ++gspca_dev->sequence;
d43fa32f 443 } else if (gspca_dev->last_packet_type == DISCARD_PACKET) {
06ca78fa
JFM		 444 if (packet_type == LAST_PACKET)
445 gspca_dev->last_packet_type = packet_type;
76dd272b 446 return;
d43fa32f 447 }
63eb9546 448
d43fa32f 449 /* append the packet to the frame buffer */
63eb9546
JFM		 450 if (len > 0) {
451 if (frame->data_end - frame->data + len
452 > frame->v4l2_buf.length) {
a9e11134 453 PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d",
63eb9546
JFM		 454 frame->data_end - frame->data + len,
455 frame->v4l2_buf.length);
456 packet_type = DISCARD_PACKET;
457 } else {
ac0d6df6 458 memcpy(frame->data_end, data, len);
63eb9546
JFM		 459 frame->data_end += len;
460 }
461 }
462 gspca_dev->last_packet_type = packet_type;
463
219423c1 464 /* if last packet, wake up the application and advance in the queue */
63eb9546
JFM		 465 if (packet_type == LAST_PACKET) {
466 frame->v4l2_buf.bytesused = frame->data_end - frame->data;
467 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED;
468 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE;
63eb9546 469 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
d43fa32f
JFM		 470 i = (gspca_dev->fr_i + 1) % gspca_dev->nframes;
471 gspca_dev->fr_i = i;
63eb9546
JFM		 472 PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d",
473 frame->v4l2_buf.bytesused,
474 gspca_dev->fr_q,
475 i,
476 gspca_dev->fr_o);
477 j = gspca_dev->fr_queue[i];
76dd272b 478 gspca_dev->cur_frame = &gspca_dev->frame[j];
63eb9546 479 }
63eb9546
JFM		 480}
481EXPORT_SYMBOL(gspca_frame_add);
482
483static int gspca_is_compressed(__u32 format)
484{
485 switch (format) {
486 case V4L2_PIX_FMT_MJPEG:
487 case V4L2_PIX_FMT_JPEG:
50a871fe 488 case V4L2_PIX_FMT_SPCA561:
ab8f12cf 489 case V4L2_PIX_FMT_PAC207:
d661e622 490 case V4L2_PIX_FMT_MR97310A:
63eb9546
JFM		 491 return 1;
492 }
493 return 0;
494}
495
d50e257e 496static void *rvmalloc(long size)
63eb9546
JFM		 497{
498 void *mem;
499 unsigned long adr;
500
63eb9546 501 mem = vmalloc_32(size);
efab8211 502 if (mem != NULL) {
63eb9546 503 adr = (unsigned long) mem;
d50e257e 504 while (size > 0) {
63eb9546
JFM		 505 SetPageReserved(vmalloc_to_page((void *) adr));
506 adr += PAGE_SIZE;
507 size -= PAGE_SIZE;
508 }
509 }
510 return mem;
511}
512
ac0d6df6 513static void rvfree(void *mem, long size)
63eb9546
JFM		 514{
515 unsigned long adr;
516
63eb9546 517 adr = (unsigned long) mem;
ac0d6df6 518 while (size > 0) {
63eb9546
JFM		 519 ClearPageReserved(vmalloc_to_page((void *) adr));
520 adr += PAGE_SIZE;
521 size -= PAGE_SIZE;
522 }
523 vfree(mem);
524}
525
526static int frame_alloc(struct gspca_dev *gspca_dev,
d43fa32f 527 unsigned int count)
63eb9546 528{
d43fa32f
JFM		 529 struct gspca_frame *frame;
530 unsigned int frsz;
531 int i;
63eb9546 532
c2446b3e
JFM		 533 i = gspca_dev->curr_mode;
534 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
63eb9546 535 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
63eb9546 536 frsz = PAGE_ALIGN(frsz);
63eb9546 537 gspca_dev->frsz = frsz;
c2446b3e
JFM		 538 if (count > GSPCA_MAX_FRAMES)
539 count = GSPCA_MAX_FRAMES;
ac0d6df6
JFM		 540 gspca_dev->frbuf = rvmalloc(frsz * count);
541 if (!gspca_dev->frbuf) {
542 err("frame alloc failed");
543 return -ENOMEM;
63eb9546
JFM		 544 }
545 gspca_dev->nframes = count;
546 for (i = 0; i < count; i++) {
d43fa32f
JFM		 547 frame = &gspca_dev->frame[i];
548 frame->v4l2_buf.index = i;
549 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
550 frame->v4l2_buf.flags = 0;
551 frame->v4l2_buf.field = V4L2_FIELD_NONE;
552 frame->v4l2_buf.length = frsz;
553 frame->v4l2_buf.memory = gspca_dev->memory;
554 frame->v4l2_buf.sequence = 0;
ac0d6df6 555 frame->data = frame->data_end =
d43fa32f 556 gspca_dev->frbuf + i * frsz;
ac0d6df6 557 frame->v4l2_buf.m.offset = i * frsz;
63eb9546
JFM		 558 }
559 gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
3ec342f2 560 gspca_dev->cur_frame = &gspca_dev->frame[0];
63eb9546
JFM		 561 gspca_dev->last_packet_type = DISCARD_PACKET;
562 gspca_dev->sequence = 0;
d43fa32f 563 return 0;
63eb9546
JFM		 564}
565
566static void frame_free(struct gspca_dev *gspca_dev)
567{
568 int i;
569
570 PDEBUG(D_STREAM, "frame free");
efab8211 571 if (gspca_dev->frbuf != NULL) {
63eb9546
JFM		 572 rvfree(gspca_dev->frbuf,
573 gspca_dev->nframes * gspca_dev->frsz);
574 gspca_dev->frbuf = NULL;
575 for (i = 0; i < gspca_dev->nframes; i++)
576 gspca_dev->frame[i].data = NULL;
577 }
578 gspca_dev->nframes = 0;
579}
580
d43fa32f 581static void destroy_urbs(struct gspca_dev *gspca_dev)
63eb9546
JFM		 582{
583 struct urb *urb;
584 unsigned int i;
585
586 PDEBUG(D_STREAM, "kill transfer");
44732819 587 for (i = 0; i < MAX_NURBS; i++) {
4aa0d037 588 urb = gspca_dev->urb[i];
63eb9546 589 if (urb == NULL)
d43fa32f 590 break;
63eb9546 591
4aa0d037 592 gspca_dev->urb[i] = NULL;
090264e5 593 usb_kill_urb(urb);
efab8211 594 if (urb->transfer_buffer != NULL)
63eb9546
JFM		 595 usb_buffer_free(gspca_dev->dev,
596 urb->transfer_buffer_length,
4aa0d037 597 urb->transfer_buffer,
63eb9546 598 urb->transfer_dma);
63eb9546
JFM		 599 usb_free_urb(urb);
600 }
63eb9546
JFM		 601}
602
603/*
219423c1 604 * look for an input transfer endpoint in an alternate setting
63eb9546 605 */
0be01004 606static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
6929dc6b 607 int xfer)
63eb9546
JFM		 608{
609 struct usb_host_endpoint *ep;
610 int i, attr;
611
63eb9546
JFM		 612 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
613 ep = &alt->endpoint[i];
50e06dee 614 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
30d35e49
JFM		 615 if (attr == xfer
616 && ep->desc.wMaxPacketSize != 0)
50e06dee 617 return ep;
63eb9546
JFM		 618 }
619 return NULL;
620}
621
622/*
219423c1 623 * look for an input (isoc or bulk) endpoint
63eb9546
JFM		 624 *
625 * The endpoint is defined by the subdriver.
626 * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
627 * This routine may be called many times when the bandwidth is too small
628 * (the bandwidth is checked on urb submit).
629 */
0be01004 630static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
63eb9546
JFM		 631{
632 struct usb_interface *intf;
633 struct usb_host_endpoint *ep;
6929dc6b 634 int xfer, i, ret;
63eb9546
JFM		 635
636 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
6a7eba24 637 ep = NULL;
6929dc6b
JFM		 638 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
639 : USB_ENDPOINT_XFER_ISOC;
63eb9546 640 i = gspca_dev->alt; /* previous alt setting */
a511ba94
HG		 641 if (gspca_dev->cam.reverse_alts) {
642 while (++i < gspca_dev->nbalt) {
643 ep = alt_xfer(&intf->altsetting[i], xfer);
644 if (ep)
645 break;
646 }
647 } else {
648 while (--i >= 0) {
649 ep = alt_xfer(&intf->altsetting[i], xfer);
650 if (ep)
651 break;
652 }
63eb9546 653 }
6a7eba24 654 if (ep == NULL) {
6929dc6b
JFM		 655 err("no transfer endpoint found");
656 return NULL;
63eb9546 657 }
0be01004 658 PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
63eb9546 659 i, ep->desc.bEndpointAddress);
1c8336d3 660 gspca_dev->alt = i; /* memorize the current alt setting */
8dd07ef1 661 if (gspca_dev->nbalt > 1) {
0274d42e 662 gspca_input_destroy_urb(gspca_dev);
95d9142c
JFM		 663 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
664 if (ret < 0) {
6929dc6b 665 err("set alt %d err %d", i, ret);
0274d42e 666 ep = NULL;
95d9142c 667 }
0274d42e 668 gspca_input_create_urb(gspca_dev);
63eb9546 669 }
63eb9546
JFM		 670 return ep;
671}
672
673/*
0be01004 674 * create the URBs for image transfer
63eb9546
JFM		 675 */
676static int create_urbs(struct gspca_dev *gspca_dev,
677 struct usb_host_endpoint *ep)
678{
679 struct urb *urb;
d43fa32f 680 int n, nurbs, i, psize, npkt, bsize;
63eb9546
JFM		 681
682 /* calculate the packet size and the number of packets */
63eb9546 683 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
d43fa32f 684
6929dc6b 685 if (!gspca_dev->cam.bulk) { /* isoc */
95d9142c
JFM		 686
687 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
1f53b0b0
JFM		 688 if (gspca_dev->pkt_size == 0)
689 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
690 else
691 psize = gspca_dev->pkt_size;
49cb6b04
JFM		 692 npkt = gspca_dev->cam.npkt;
693 if (npkt == 0)
694 npkt = 32; /* default value */
0be01004
JFM		 695 bsize = psize * npkt;
696 PDEBUG(D_STREAM,
697 "isoc %d pkts size %d = bsize:%d",
698 npkt, psize, bsize);
51977a8d 699 nurbs = DEF_NURBS;
95d9142c 700 } else { /* bulk */
0be01004 701 npkt = 0;
dff369aa 702 bsize = gspca_dev->cam.bulk_size;
95d9142c
JFM		 703 if (bsize == 0)
704 bsize = psize;
0be01004 705 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
dff369aa
AO		 706 if (gspca_dev->cam.bulk_nurbs != 0)
707 nurbs = gspca_dev->cam.bulk_nurbs;
708 else
709 nurbs = 1;
0be01004
JFM		 710 }
711
d43fa32f 712 for (n = 0; n < nurbs; n++) {
63eb9546
JFM		 713 urb = usb_alloc_urb(npkt, GFP_KERNEL);
714 if (!urb) {
715 err("usb_alloc_urb failed");
716 return -ENOMEM;
717 }
db870875 718 gspca_dev->urb[n] = urb;
4aa0d037 719 urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev,
63eb9546
JFM		 720 bsize,
721 GFP_KERNEL,
722 &urb->transfer_dma);
723
4aa0d037 724 if (urb->transfer_buffer == NULL) {
db870875 725 err("usb_buffer_alloc failed");
63eb9546
JFM		 726 return -ENOMEM;
727 }
63eb9546
JFM		 728 urb->dev = gspca_dev->dev;
729 urb->context = gspca_dev;
63eb9546 730 urb->transfer_buffer_length = bsize;
0be01004
JFM		 731 if (npkt != 0) { /* ISOC */
732 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
733 ep->desc.bEndpointAddress);
6c49da7f
FZ		 734 urb->transfer_flags = URB_ISO_ASAP
735 | URB_NO_TRANSFER_DMA_MAP;
0be01004
JFM		 736 urb->interval = ep->desc.bInterval;
737 urb->complete = isoc_irq;
738 urb->number_of_packets = npkt;
739 for (i = 0; i < npkt; i++) {
740 urb->iso_frame_desc[i].length = psize;
741 urb->iso_frame_desc[i].offset = psize * i;
742 }
743 } else { /* bulk */
744 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
745 ep->desc.bEndpointAddress),
6c49da7f 746 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
0be01004 747 urb->complete = bulk_irq;
63eb9546
JFM		 748 }
749 }
750 return 0;
751}
752
753/*
754 * start the USB transfer
755 */
756static int gspca_init_transfer(struct gspca_dev *gspca_dev)
757{
63eb9546 758 struct usb_host_endpoint *ep;
db870875 759 struct urb *urb;
63eb9546
JFM		 760 int n, ret;
761
e2997a72
HG		 762 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
763 return -ERESTARTSYS;
63eb9546 764
090264e5
JFM		 765 if (!gspca_dev->present) {
766 ret = -ENODEV;
767 goto out;
768 }
769
ab6c8cf2
JFM		 770 gspca_dev->usb_err = 0;
771
d43fa32f
JFM		 772 /* set the higher alternate setting and
773 * loop until urb submit succeeds */
a511ba94
HG		 774 if (gspca_dev->cam.reverse_alts)
775 gspca_dev->alt = 0;
776 else
777 gspca_dev->alt = gspca_dev->nbalt;
778
1f53b0b0
JFM		 779 if (gspca_dev->sd_desc->isoc_init) {
780 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
781 if (ret < 0)
782 goto out;
783 }
784 ep = get_ep(gspca_dev);
785 if (ep == NULL) {
786 ret = -EIO;
787 goto out;
788 }
63eb9546 789 for (;;) {
47aaca96
JFM		 790 if (!gspca_dev->cam.no_urb_create) {
791 PDEBUG(D_STREAM, "init transfer alt %d",
792 gspca_dev->alt);
793 ret = create_urbs(gspca_dev, ep);
794 if (ret < 0) {
795 destroy_urbs(gspca_dev);
796 goto out;
797 }
db870875 798 }
63eb9546 799
8fe2f1d5 800 /* clear the bulk endpoint */
6929dc6b 801 if (gspca_dev->cam.bulk)
8fe2f1d5 802 usb_clear_halt(gspca_dev->dev,
50e06dee 803 gspca_dev->urb[0]->pipe);
8fe2f1d5 804
63eb9546 805 /* start the cam */
72ab97ce
JFM		 806 ret = gspca_dev->sd_desc->start(gspca_dev);
807 if (ret < 0) {
808 destroy_urbs(gspca_dev);
809 goto out;
810 }
63eb9546 811 gspca_dev->streaming = 1;
63eb9546 812
dff369aa 813 /* some bulk transfers are started by the subdriver */
6929dc6b 814 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
51977a8d
JFM		 815 break;
816
63eb9546 817 /* submit the URBs */
db870875
JFM		 818 for (n = 0; n < MAX_NURBS; n++) {
819 urb = gspca_dev->urb[n];
820 if (urb == NULL)
821 break;
822 ret = usb_submit_urb(urb, GFP_KERNEL);
1f53b0b0
JFM		 823 if (ret < 0)
824 break;
63eb9546
JFM		 825 }
826 if (ret >= 0)
827 break;
1f53b0b0
JFM		 828 gspca_dev->streaming = 0;
829 destroy_urbs(gspca_dev);
4bdf4a83
JFM		 830 if (ret != -ENOSPC) {
831 PDEBUG(D_ERR|D_STREAM,
832 "usb_submit_urb alt %d err %d",
833 gspca_dev->alt, ret);
1f53b0b0 834 goto out;
4bdf4a83 835 }
1f53b0b0
JFM		 836
837 /* the bandwidth is not wide enough
838 * negociate or try a lower alternate setting */
4bdf4a83
JFM		 839 PDEBUG(D_ERR|D_STREAM,
840 "bandwidth not wide enough - trying again");
1f53b0b0
JFM		 841 msleep(20); /* wait for kill complete */
842 if (gspca_dev->sd_desc->isoc_nego) {
843 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
844 if (ret < 0)
845 goto out;
846 } else {
847 ep = get_ep(gspca_dev);
848 if (ep == NULL) {
849 ret = -EIO;
850 goto out;
851 }
852 }
63eb9546
JFM		 853 }
854out:
855 mutex_unlock(&gspca_dev->usb_lock);
856 return ret;
857}
858
859static int gspca_set_alt0(struct gspca_dev *gspca_dev)
860{
861 int ret;
862
8dd07ef1
JFM		 863 if (gspca_dev->alt == 0)
864 return 0;
63eb9546
JFM		 865 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
866 if (ret < 0)
f955c4fc 867 PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret);
63eb9546
JFM		 868 return ret;
869}
870
219423c1 871/* Note: both the queue and the usb locks should be held when calling this */
63eb9546
JFM		 872static void gspca_stream_off(struct gspca_dev *gspca_dev)
873{
63eb9546 874 gspca_dev->streaming = 0;
090264e5
JFM		 875 if (gspca_dev->present) {
876 if (gspca_dev->sd_desc->stopN)
877 gspca_dev->sd_desc->stopN(gspca_dev);
878 destroy_urbs(gspca_dev);
0274d42e 879 gspca_input_destroy_urb(gspca_dev);
d08e2ce0 880 gspca_set_alt0(gspca_dev);
0274d42e 881 gspca_input_create_urb(gspca_dev);
090264e5
JFM		 882 }
883
884 /* always call stop0 to free the subdriver's resources */
98522a7b
JFM		 885 if (gspca_dev->sd_desc->stop0)
886 gspca_dev->sd_desc->stop0(gspca_dev);
887 PDEBUG(D_STREAM, "stream off OK");
63eb9546
JFM		 888}
889
d43fa32f 890static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
63eb9546
JFM		 891{
892 int i;
893
894 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
895 gspca_dev->curr_mode = i;
896 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
897 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
c2446b3e 898 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
63eb9546
JFM		 899}
900
901static int wxh_to_mode(struct gspca_dev *gspca_dev,
902 int width, int height)
903{
904 int i;
905
d43fa32f
JFM		 906 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
907 if (width >= gspca_dev->cam.cam_mode[i].width
908 && height >= gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 909 break;
910 }
63eb9546
JFM		 911 return i;
912}
913
63eb9546
JFM		 914/*
915 * search a mode with the right pixel format
916 */
917static int gspca_get_mode(struct gspca_dev *gspca_dev,
918 int mode,
919 int pixfmt)
920{
921 int modeU, modeD;
922
923 modeU = modeD = mode;
924 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
925 if (--modeD >= 0) {
c2446b3e
JFM		 926 if (gspca_dev->cam.cam_mode[modeD].pixelformat
927 == pixfmt)
63eb9546
JFM		 928 return modeD;
929 }
930 if (++modeU < gspca_dev->cam.nmodes) {
c2446b3e
JFM		 931 if (gspca_dev->cam.cam_mode[modeU].pixelformat
932 == pixfmt)
63eb9546
JFM		 933 return modeU;
934 }
935 }
936 return -EINVAL;
937}
938
af1d9afa
BJ		 939#ifdef CONFIG_VIDEO_ADV_DEBUG
940static int vidioc_g_register(struct file *file, void *priv,
941 struct v4l2_dbg_register *reg)
942{
943 int ret;
944 struct gspca_dev *gspca_dev = priv;
945
946 if (!gspca_dev->sd_desc->get_chip_ident)
947 return -EINVAL;
948
949 if (!gspca_dev->sd_desc->get_register)
950 return -EINVAL;
951
952 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
953 return -ERESTARTSYS;
8c4ebae4 954 gspca_dev->usb_err = 0;
af1d9afa
BJ		 955 if (gspca_dev->present)
956 ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
957 else
958 ret = -ENODEV;
959 mutex_unlock(&gspca_dev->usb_lock);
960
961 return ret;
962}
963
964static int vidioc_s_register(struct file *file, void *priv,
965 struct v4l2_dbg_register *reg)
966{
967 int ret;
968 struct gspca_dev *gspca_dev = priv;
969
970 if (!gspca_dev->sd_desc->get_chip_ident)
971 return -EINVAL;
972
973 if (!gspca_dev->sd_desc->set_register)
974 return -EINVAL;
975
976 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
977 return -ERESTARTSYS;
8c4ebae4 978 gspca_dev->usb_err = 0;
af1d9afa
BJ		 979 if (gspca_dev->present)
980 ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
981 else
982 ret = -ENODEV;
983 mutex_unlock(&gspca_dev->usb_lock);
984
985 return ret;
986}
987#endif
988
989static int vidioc_g_chip_ident(struct file *file, void *priv,
990 struct v4l2_dbg_chip_ident *chip)
991{
992 int ret;
993 struct gspca_dev *gspca_dev = priv;
994
995 if (!gspca_dev->sd_desc->get_chip_ident)
996 return -EINVAL;
997
998 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
999 return -ERESTARTSYS;
8c4ebae4 1000 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1001 if (gspca_dev->present)
1002 ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
1003 else
1004 ret = -ENODEV;
1005 mutex_unlock(&gspca_dev->usb_lock);
1006
1007 return ret;
1008}
1009
e078770a 1010static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1011 struct v4l2_fmtdesc *fmtdesc)
1012{
1013 struct gspca_dev *gspca_dev = priv;
6a7eba24 1014 int i, j, index;
63eb9546
JFM		 1015 __u32 fmt_tb[8];
1016
63eb9546
JFM		 1017 /* give an index to each format */
1018 index = 0;
1019 j = 0;
1020 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
c2446b3e 1021 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
63eb9546
JFM		 1022 j = 0;
1023 for (;;) {
1024 if (fmt_tb[j] == fmt_tb[index])
1025 break;
1026 j++;
1027 }
1028 if (j == index) {
1029 if (fmtdesc->index == index)
1030 break; /* new format */
1031 index++;
80297125 1032 if (index >= ARRAY_SIZE(fmt_tb))
63eb9546
JFM		 1033 return -EINVAL;
1034 }
1035 }
1036 if (i < 0)
1037 return -EINVAL; /* no more format */
1038
63eb9546
JFM		 1039 fmtdesc->pixelformat = fmt_tb[index];
1040 if (gspca_is_compressed(fmt_tb[index]))
1041 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1042 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1043 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1044 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1045 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1046 fmtdesc->description[4] = '\0';
1047 return 0;
1048}
1049
e078770a 1050static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1051 struct v4l2_format *fmt)
1052{
1053 struct gspca_dev *gspca_dev = priv;
c2446b3e 1054 int mode;
63eb9546 1055
c2446b3e
JFM		 1056 mode = gspca_dev->curr_mode;
1057 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1058 sizeof fmt->fmt.pix);
63eb9546
JFM		 1059 return 0;
1060}
1061
e078770a 1062static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1063 struct v4l2_format *fmt)
1064{
24c530b4 1065 int w, h, mode, mode2;
63eb9546 1066
4aa0d037
JFM		 1067 w = fmt->fmt.pix.width;
1068 h = fmt->fmt.pix.height;
d43fa32f 1069
335b3f88 1070#ifdef GSPCA_DEBUG
63eb9546
JFM		 1071 if (gspca_debug & D_CONF)
1072 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1073#endif
1074 /* search the closest mode for width and height */
1075 mode = wxh_to_mode(gspca_dev, w, h);
1076
1077 /* OK if right palette */
c2446b3e
JFM		 1078 if (gspca_dev->cam.cam_mode[mode].pixelformat
1079 != fmt->fmt.pix.pixelformat) {
63eb9546
JFM		 1080
1081 /* else, search the closest mode with the same pixel format */
1082 mode2 = gspca_get_mode(gspca_dev, mode,
1083 fmt->fmt.pix.pixelformat);
c2446b3e 1084 if (mode2 >= 0)
63eb9546 1085 mode = mode2;
c2446b3e
JFM		 1086/* else
1087 ; * no chance, return this mode */
63eb9546 1088 }
c2446b3e
JFM		 1089 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1090 sizeof fmt->fmt.pix);
63eb9546
JFM		 1091 return mode; /* used when s_fmt */
1092}
1093
e078770a 1094static int vidioc_try_fmt_vid_cap(struct file *file,
63eb9546
JFM		 1095 void *priv,
1096 struct v4l2_format *fmt)
1097{
4aa0d037 1098 struct gspca_dev *gspca_dev = priv;
63eb9546
JFM		 1099 int ret;
1100
e078770a 1101 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1102 if (ret < 0)
1103 return ret;
1104 return 0;
1105}
1106
e078770a 1107static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1108 struct v4l2_format *fmt)
1109{
1110 struct gspca_dev *gspca_dev = priv;
d43fa32f 1111 int ret;
63eb9546 1112
e2997a72
HG		 1113 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1114 return -ERESTARTSYS;
d43fa32f 1115
e078770a 1116 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1117 if (ret < 0)
1118 goto out;
1119
d43fa32f
JFM		 1120 if (gspca_dev->nframes != 0
1121 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1122 ret = -EINVAL;
1123 goto out;
1124 }
1125
50a871fe
JFM		 1126 if (ret == gspca_dev->curr_mode) {
1127 ret = 0;
63eb9546 1128 goto out; /* same mode */
50a871fe 1129 }
d43fa32f
JFM		 1130
1131 if (gspca_dev->streaming) {
1132 ret = -EBUSY;
1133 goto out;
e2997a72 1134 }
4aa0d037
JFM		 1135 gspca_dev->width = fmt->fmt.pix.width;
1136 gspca_dev->height = fmt->fmt.pix.height;
63eb9546
JFM		 1137 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1138 gspca_dev->curr_mode = ret;
d43fa32f 1139
d43fa32f 1140 ret = 0;
63eb9546
JFM		 1141out:
1142 mutex_unlock(&gspca_dev->queue_lock);
1143 return ret;
1144}
1145
11c635a2
HG		 1146static int vidioc_enum_framesizes(struct file *file, void *priv,
1147 struct v4l2_frmsizeenum *fsize)
1148{
1149 struct gspca_dev *gspca_dev = priv;
1150 int i;
1151 __u32 index = 0;
1152
1153 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1154 if (fsize->pixel_format !=
1155 gspca_dev->cam.cam_mode[i].pixelformat)
1156 continue;
1157
1158 if (fsize->index == index) {
1159 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1160 fsize->discrete.width =
1161 gspca_dev->cam.cam_mode[i].width;
1162 fsize->discrete.height =
1163 gspca_dev->cam.cam_mode[i].height;
1164 return 0;
1165 }
1166 index++;
1167 }
1168
1169 return -EINVAL;
1170}
1171
28ffe77f
AO		 1172static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1173 struct v4l2_frmivalenum *fival)
1174{
1175 struct gspca_dev *gspca_dev = priv;
1176 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1177 __u32 i;
1178
1179 if (gspca_dev->cam.mode_framerates == NULL ||
1180 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1181 return -EINVAL;
1182
1183 if (fival->pixel_format !=
1184 gspca_dev->cam.cam_mode[mode].pixelformat)
1185 return -EINVAL;
1186
1187 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1188 if (fival->index == i) {
1189 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1190 fival->discrete.numerator = 1;
1191 fival->discrete.denominator =
1192 gspca_dev->cam.mode_framerates[mode].rates[i];
1193 return 0;
1194 }
1195 }
1196
1197 return -EINVAL;
1198}
1199
d0182306 1200static void gspca_release(struct video_device *vfd)
6b060ffe 1201{
d0182306 1202 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
6b060ffe 1203
38c7c036
LP		 1204 PDEBUG(D_PROBE, "%s released",
1205 video_device_node_name(&gspca_dev->vdev));
6b060ffe
FZ		 1206
1207 kfree(gspca_dev->usb_buf);
1208 kfree(gspca_dev);
1209}
1210
bec43661 1211static int dev_open(struct file *file)
63eb9546
JFM		 1212{
1213 struct gspca_dev *gspca_dev;
1214 int ret;
1215
0d07e240 1216 PDEBUG(D_STREAM, "[%s] open", current->comm);
a12ca6a6 1217 gspca_dev = (struct gspca_dev *) video_devdata(file);
e2997a72
HG		 1218 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1219 return -ERESTARTSYS;
63eb9546
JFM		 1220 if (!gspca_dev->present) {
1221 ret = -ENODEV;
1222 goto out;
1223 }
1224
012d6b02 1225 if (gspca_dev->users > 4) { /* (arbitrary value) */
63eb9546
JFM		 1226 ret = -EBUSY;
1227 goto out;
1228 }
5c4fa002
JFM		 1229
1230 /* protect the subdriver against rmmod */
1231 if (!try_module_get(gspca_dev->module)) {
1232 ret = -ENODEV;
1233 goto out;
1234 }
1235
63eb9546 1236 gspca_dev->users++;
6b060ffe 1237
63eb9546 1238 file->private_data = gspca_dev;
335b3f88 1239#ifdef GSPCA_DEBUG
63eb9546 1240 /* activate the v4l2 debug */
d43fa32f 1241 if (gspca_debug & D_V4L2)
a12ca6a6 1242 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
9de436cf 1243 | V4L2_DEBUG_IOCTL_ARG;
63eb9546 1244 else
a12ca6a6 1245 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
9de436cf 1246 | V4L2_DEBUG_IOCTL_ARG);
63eb9546 1247#endif
012d6b02 1248 ret = 0;
63eb9546
JFM		 1249out:
1250 mutex_unlock(&gspca_dev->queue_lock);
1251 if (ret != 0)
1252 PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
1253 else
d43fa32f 1254 PDEBUG(D_STREAM, "open done");
63eb9546
JFM		 1255 return ret;
1256}
1257
bec43661 1258static int dev_close(struct file *file)
63eb9546
JFM		 1259{
1260 struct gspca_dev *gspca_dev = file->private_data;
1261
0d07e240 1262 PDEBUG(D_STREAM, "[%s] close", current->comm);
e2997a72
HG		 1263 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1264 return -ERESTARTSYS;
1265 gspca_dev->users--;
e2997a72 1266
5b77ae77 1267 /* if the file did the capture, free the streaming resources */
4aa0d037 1268 if (gspca_dev->capt_file == file) {
a1e8288b
JFM		 1269 if (gspca_dev->streaming) {
1270 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1271 gspca_dev->usb_err = 0;
a1e8288b
JFM		 1272 gspca_stream_off(gspca_dev);
1273 mutex_unlock(&gspca_dev->usb_lock);
1274 }
4aa0d037 1275 frame_free(gspca_dev);
efab8211 1276 gspca_dev->capt_file = NULL;
d43fa32f 1277 gspca_dev->memory = GSPCA_MEMORY_NO;
4aa0d037 1278 }
d43fa32f 1279 file->private_data = NULL;
5c4fa002 1280 module_put(gspca_dev->module);
63eb9546 1281 mutex_unlock(&gspca_dev->queue_lock);
6b060ffe 1282
d43fa32f 1283 PDEBUG(D_STREAM, "close done");
6b060ffe 1284
63eb9546
JFM		 1285 return 0;
1286}
1287
1288static int vidioc_querycap(struct file *file, void *priv,
1289 struct v4l2_capability *cap)
1290{
1291 struct gspca_dev *gspca_dev = priv;
090264e5 1292 int ret;
63eb9546 1293
090264e5
JFM		 1294 /* protect the access to the usb device */
1295 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1296 return -ERESTARTSYS;
1297 if (!gspca_dev->present) {
1298 ret = -ENODEV;
1299 goto out;
1300 }
63eb9546 1301 strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
c6edaf16
JFM		 1302 if (gspca_dev->dev->product != NULL) {
1303 strncpy(cap->card, gspca_dev->dev->product,
1304 sizeof cap->card);
1305 } else {
1306 snprintf(cap->card, sizeof cap->card,
1307 "USB Camera (%04x:%04x)",
1308 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1309 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1310 }
5932028f 1311 usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info));
63eb9546
JFM		 1312 cap->version = DRIVER_VERSION_NUMBER;
1313 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
1314 | V4L2_CAP_STREAMING
1315 | V4L2_CAP_READWRITE;
090264e5
JFM		 1316 ret = 0;
1317out:
1318 mutex_unlock(&gspca_dev->usb_lock);
1319 return ret;
63eb9546
JFM		 1320}
1321
a0001a28
HG		 1322static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev,
1323 int id)
1324{
1325 const struct ctrl *ctrls;
1326 int i;
1327
1328 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1329 i < gspca_dev->sd_desc->nctrls;
1330 i++, ctrls++) {
1331 if (gspca_dev->ctrl_dis & (1 << i))
1332 continue;
1333 if (id == ctrls->qctrl.id)
1334 return ctrls;
1335 }
1336 return NULL;
1337}
1338
63eb9546
JFM		 1339static int vidioc_queryctrl(struct file *file, void *priv,
1340 struct v4l2_queryctrl *q_ctrl)
1341{
1342 struct gspca_dev *gspca_dev = priv;
a0001a28
HG		 1343 const struct ctrl *ctrls;
1344 int i;
6a7eba24
JFM		 1345 u32 id;
1346
a0001a28 1347 ctrls = NULL;
6a7eba24
JFM		 1348 id = q_ctrl->id;
1349 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1350 id &= V4L2_CTRL_ID_MASK;
1351 id++;
1352 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
a0001a28 1353 if (gspca_dev->ctrl_dis & (1 << i))
f50ba1be 1354 continue;
b8bfb5fb 1355 if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
f50ba1be 1356 continue;
b8bfb5fb 1357 if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id
a0001a28 1358 > ctrls->qctrl.id)
b8bfb5fb 1359 continue;
a0001a28 1360 ctrls = &gspca_dev->sd_desc->ctrls[i];
63eb9546 1361 }
83955556
JFM		 1362 if (ctrls == NULL)
1363 return -EINVAL;
a0001a28
HG		 1364 } else {
1365 ctrls = get_ctrl(gspca_dev, id);
83955556
JFM		 1366 if (ctrls == NULL)
1367 return -EINVAL;
4af85668 1368 i = ctrls - gspca_dev->sd_desc->ctrls;
63eb9546 1369 }
a0001a28 1370 memcpy(q_ctrl, ctrls, sizeof *q_ctrl);
4af85668
JFM		 1371 if (gspca_dev->ctrl_inac & (1 << i))
1372 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
f50ba1be 1373 return 0;
63eb9546
JFM		 1374}
1375
1376static int vidioc_s_ctrl(struct file *file, void *priv,
1377 struct v4l2_control *ctrl)
1378{
1379 struct gspca_dev *gspca_dev = priv;
a5ae2062 1380 const struct ctrl *ctrls;
a0001a28 1381 int ret;
63eb9546 1382
a0001a28
HG		 1383 ctrls = get_ctrl(gspca_dev, ctrl->id);
1384 if (ctrls == NULL)
1385 return -EINVAL;
1386
1387 if (ctrl->value < ctrls->qctrl.minimum
1388 || ctrl->value > ctrls->qctrl.maximum)
1389 return -ERANGE;
1390 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1391 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1392 return -ERESTARTSYS;
8c4ebae4 1393 gspca_dev->usb_err = 0;
a0001a28
HG		 1394 if (gspca_dev->present)
1395 ret = ctrls->set(gspca_dev, ctrl->value);
1396 else
1397 ret = -ENODEV;
1398 mutex_unlock(&gspca_dev->usb_lock);
1399 return ret;
63eb9546
JFM		 1400}
1401
1402static int vidioc_g_ctrl(struct file *file, void *priv,
1403 struct v4l2_control *ctrl)
1404{
1405 struct gspca_dev *gspca_dev = priv;
a5ae2062 1406 const struct ctrl *ctrls;
a0001a28 1407 int ret;
63eb9546 1408
a0001a28
HG		 1409 ctrls = get_ctrl(gspca_dev, ctrl->id);
1410 if (ctrls == NULL)
1411 return -EINVAL;
1412
1413 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1414 return -ERESTARTSYS;
8c4ebae4 1415 gspca_dev->usb_err = 0;
a0001a28
HG		 1416 if (gspca_dev->present)
1417 ret = ctrls->get(gspca_dev, &ctrl->value);
1418 else
1419 ret = -ENODEV;
1420 mutex_unlock(&gspca_dev->usb_lock);
1421 return ret;
63eb9546
JFM		 1422}
1423
f955c4fc
JFM		 1424/*fixme: have an audio flag in gspca_dev?*/
1425static int vidioc_s_audio(struct file *file, void *priv,
1426 struct v4l2_audio *audio)
1427{
1428 if (audio->index != 0)
1429 return -EINVAL;
1430 return 0;
1431}
1432
1433static int vidioc_g_audio(struct file *file, void *priv,
1434 struct v4l2_audio *audio)
1435{
f955c4fc
JFM		 1436 strcpy(audio->name, "Microphone");
1437 return 0;
1438}
1439
1440static int vidioc_enumaudio(struct file *file, void *priv,
1441 struct v4l2_audio *audio)
1442{
1443 if (audio->index != 0)
1444 return -EINVAL;
1445
1446 strcpy(audio->name, "Microphone");
1447 audio->capability = 0;
1448 audio->mode = 0;
1449 return 0;
1450}
1451
63eb9546
JFM		 1452static int vidioc_querymenu(struct file *file, void *priv,
1453 struct v4l2_querymenu *qmenu)
1454{
1455 struct gspca_dev *gspca_dev = priv;
1456
1457 if (!gspca_dev->sd_desc->querymenu)
1458 return -EINVAL;
1459 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1460}
1461
1462static int vidioc_enum_input(struct file *file, void *priv,
1463 struct v4l2_input *input)
1464{
1465 struct gspca_dev *gspca_dev = priv;
1466
1467 if (input->index != 0)
1468 return -EINVAL;
63eb9546 1469 input->type = V4L2_INPUT_TYPE_CAMERA;
dfa76fa2 1470 input->status = gspca_dev->cam.input_flags;
63eb9546
JFM		 1471 strncpy(input->name, gspca_dev->sd_desc->name,
1472 sizeof input->name);
1473 return 0;
1474}
1475
1476static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1477{
1478 *i = 0;
1479 return 0;
1480}
1481
1482static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1483{
1484 if (i > 0)
1485 return -EINVAL;
1486 return (0);
1487}
1488
1489static int vidioc_reqbufs(struct file *file, void *priv,
1490 struct v4l2_requestbuffers *rb)
1491{
1492 struct gspca_dev *gspca_dev = priv;
d43fa32f 1493 int i, ret = 0;
63eb9546 1494
d43fa32f 1495 switch (rb->memory) {
5b77ae77 1496 case GSPCA_MEMORY_READ: /* (internal call) */
d43fa32f 1497 case V4L2_MEMORY_MMAP:
d43fa32f 1498 case V4L2_MEMORY_USERPTR:
6a7eba24 1499 break;
d43fa32f 1500 default:
63eb9546 1501 return -EINVAL;
d43fa32f 1502 }
e2997a72
HG		 1503 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1504 return -ERESTARTSYS;
d43fa32f 1505
5b77ae77
JFM		 1506 if (gspca_dev->memory != GSPCA_MEMORY_NO
1507 && gspca_dev->memory != rb->memory) {
4aa0d037
JFM		 1508 ret = -EBUSY;
1509 goto out;
1510 }
d43fa32f 1511
5b77ae77
JFM		 1512 /* only one file may do the capture */
1513 if (gspca_dev->capt_file != NULL
1514 && gspca_dev->capt_file != file) {
1515 ret = -EBUSY;
1516 goto out;
1517 }
1518
1519 /* if allocated, the buffers must not be mapped */
1520 for (i = 0; i < gspca_dev->nframes; i++) {
1521 if (gspca_dev->frame[i].vma_use_count) {
ac0d6df6
JFM		 1522 ret = -EBUSY;
1523 goto out;
1524 }
5b77ae77
JFM		 1525 }
1526
1527 /* stop streaming */
1528 if (gspca_dev->streaming) {
1529 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1530 gspca_dev->usb_err = 0;
5b77ae77
JFM		 1531 gspca_stream_off(gspca_dev);
1532 mutex_unlock(&gspca_dev->usb_lock);
1533 }
1534
1535 /* free the previous allocated buffers, if any */
1536 if (gspca_dev->nframes != 0) {
1537 frame_free(gspca_dev);
1538 gspca_dev->capt_file = NULL;
1539 }
1540 if (rb->count == 0) /* unrequest */
1541 goto out;
1542 gspca_dev->memory = rb->memory;
1543 ret = frame_alloc(gspca_dev, rb->count);
1544 if (ret == 0) {
1545 rb->count = gspca_dev->nframes;
1546 gspca_dev->capt_file = file;
4aa0d037
JFM		 1547 }
1548out:
63eb9546
JFM		 1549 mutex_unlock(&gspca_dev->queue_lock);
1550 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1551 return ret;
1552}
1553
1554static int vidioc_querybuf(struct file *file, void *priv,
1555 struct v4l2_buffer *v4l2_buf)
1556{
1557 struct gspca_dev *gspca_dev = priv;
1558 struct gspca_frame *frame;
1559
13752bd9 1560 if (v4l2_buf->index < 0
63eb9546
JFM		 1561 || v4l2_buf->index >= gspca_dev->nframes)
1562 return -EINVAL;
1563
1564 frame = &gspca_dev->frame[v4l2_buf->index];
1565 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1566 return 0;
1567}
1568
1569static int vidioc_streamon(struct file *file, void *priv,
1570 enum v4l2_buf_type buf_type)
1571{
1572 struct gspca_dev *gspca_dev = priv;
1573 int ret;
1574
63eb9546
JFM		 1575 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1576 return -EINVAL;
e2997a72
HG		 1577 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1578 return -ERESTARTSYS;
090264e5 1579
1edabe71
JFM		 1580 if (gspca_dev->nframes == 0
1581 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
63eb9546
JFM		 1582 ret = -EINVAL;
1583 goto out;
1584 }
1585 if (!gspca_dev->streaming) {
1586 ret = gspca_init_transfer(gspca_dev);
1587 if (ret < 0)
1588 goto out;
1589 }
335b3f88 1590#ifdef GSPCA_DEBUG
63eb9546
JFM		 1591 if (gspca_debug & D_STREAM) {
1592 PDEBUG_MODE("stream on OK",
1593 gspca_dev->pixfmt,
1594 gspca_dev->width,
1595 gspca_dev->height);
1596 }
1597#endif
e2997a72 1598 ret = 0;
63eb9546
JFM		 1599out:
1600 mutex_unlock(&gspca_dev->queue_lock);
1601 return ret;
1602}
1603
1604static int vidioc_streamoff(struct file *file, void *priv,
1605 enum v4l2_buf_type buf_type)
1606{
1607 struct gspca_dev *gspca_dev = priv;
5b77ae77 1608 int i, ret;
63eb9546 1609
63eb9546
JFM		 1610 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1611 return -EINVAL;
4aa0d037
JFM		 1612 if (!gspca_dev->streaming)
1613 return 0;
1614 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1615 return -ERESTARTSYS;
5b77ae77
JFM		 1616
1617 /* stop streaming */
4aa0d037
JFM		 1618 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1619 ret = -ERESTARTSYS;
1620 goto out;
63eb9546 1621 }
8c4ebae4 1622 gspca_dev->usb_err = 0;
4aa0d037 1623 gspca_stream_off(gspca_dev);
4aa0d037 1624 mutex_unlock(&gspca_dev->usb_lock);
5b77ae77
JFM		 1625
1626 /* empty the application queues */
1627 for (i = 0; i < gspca_dev->nframes; i++)
1628 gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
1629 gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
1630 gspca_dev->last_packet_type = DISCARD_PACKET;
1631 gspca_dev->sequence = 0;
5b77ae77 1632 ret = 0;
4aa0d037
JFM		 1633out:
1634 mutex_unlock(&gspca_dev->queue_lock);
1635 return ret;
63eb9546
JFM		 1636}
1637
1638static int vidioc_g_jpegcomp(struct file *file, void *priv,
1639 struct v4l2_jpegcompression *jpegcomp)
1640{
1641 struct gspca_dev *gspca_dev = priv;
1642 int ret;
1643
1644 if (!gspca_dev->sd_desc->get_jcomp)
1645 return -EINVAL;
e2997a72
HG		 1646 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1647 return -ERESTARTSYS;
8c4ebae4 1648 gspca_dev->usb_err = 0;
090264e5
JFM		 1649 if (gspca_dev->present)
1650 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1651 else
1652 ret = -ENODEV;
63eb9546
JFM		 1653 mutex_unlock(&gspca_dev->usb_lock);
1654 return ret;
1655}
1656
1657static int vidioc_s_jpegcomp(struct file *file, void *priv,
1658 struct v4l2_jpegcompression *jpegcomp)
1659{
1660 struct gspca_dev *gspca_dev = priv;
1661 int ret;
1662
63eb9546
JFM		 1663 if (!gspca_dev->sd_desc->set_jcomp)
1664 return -EINVAL;
f86d4a91
JP		 1665 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1666 return -ERESTARTSYS;
8c4ebae4 1667 gspca_dev->usb_err = 0;
090264e5
JFM		 1668 if (gspca_dev->present)
1669 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1670 else
1671 ret = -ENODEV;
63eb9546
JFM		 1672 mutex_unlock(&gspca_dev->usb_lock);
1673 return ret;
1674}
1675
1676static int vidioc_g_parm(struct file *filp, void *priv,
1677 struct v4l2_streamparm *parm)
1678{
1679 struct gspca_dev *gspca_dev = priv;
1680
63eb9546 1681 parm->parm.capture.readbuffers = gspca_dev->nbufread;
627a5ef7
JP		 1682
1683 if (gspca_dev->sd_desc->get_streamparm) {
1684 int ret;
1685
1686 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1687 return -ERESTARTSYS;
8c4ebae4 1688 gspca_dev->usb_err = 0;
090264e5
JFM		 1689 if (gspca_dev->present)
1690 ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
1691 parm);
1692 else
1693 ret = -ENODEV;
627a5ef7
JP		 1694 mutex_unlock(&gspca_dev->usb_lock);
1695 return ret;
1696 }
1697
63eb9546
JFM		 1698 return 0;
1699}
1700
1701static int vidioc_s_parm(struct file *filp, void *priv,
1702 struct v4l2_streamparm *parm)
1703{
1704 struct gspca_dev *gspca_dev = priv;
1705 int n;
1706
63eb9546
JFM		 1707 n = parm->parm.capture.readbuffers;
1708 if (n == 0 || n > GSPCA_MAX_FRAMES)
1709 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1710 else
1711 gspca_dev->nbufread = n;
627a5ef7
JP		 1712
1713 if (gspca_dev->sd_desc->set_streamparm) {
1714 int ret;
1715
1716 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1717 return -ERESTARTSYS;
8c4ebae4 1718 gspca_dev->usb_err = 0;
090264e5
JFM		 1719 if (gspca_dev->present)
1720 ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
1721 parm);
1722 else
1723 ret = -ENODEV;
627a5ef7
JP		 1724 mutex_unlock(&gspca_dev->usb_lock);
1725 return ret;
1726 }
1727
63eb9546
JFM		 1728 return 0;
1729}
1730
1731#ifdef CONFIG_VIDEO_V4L1_COMPAT
1732static int vidiocgmbuf(struct file *file, void *priv,
1733 struct video_mbuf *mbuf)
1734{
1735 struct gspca_dev *gspca_dev = file->private_data;
1736 int i;
1737
1738 PDEBUG(D_STREAM, "cgmbuf");
1739 if (gspca_dev->nframes == 0) {
63eb9546 1740 int ret;
6a7eba24
JFM		 1741
1742 {
1743 struct v4l2_format fmt;
1744
6a7eba24
JFM		 1745 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1746 i = gspca_dev->cam.nmodes - 1; /* highest mode */
1747 fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width;
1748 fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height;
1749 fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24;
e078770a 1750 ret = vidioc_s_fmt_vid_cap(file, priv, &fmt);
6a7eba24
JFM		 1751 if (ret != 0)
1752 return ret;
1753 }
1754 {
1755 struct v4l2_requestbuffers rb;
1756
1757 memset(&rb, 0, sizeof rb);
1758 rb.count = 4;
1759 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1760 rb.memory = V4L2_MEMORY_MMAP;
1761 ret = vidioc_reqbufs(file, priv, &rb);
1762 if (ret != 0)
1763 return ret;
1764 }
63eb9546
JFM		 1765 }
1766 mbuf->frames = gspca_dev->nframes;
1767 mbuf->size = gspca_dev->frsz * gspca_dev->nframes;
1768 for (i = 0; i < mbuf->frames; i++)
1769 mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset;
1770 return 0;
1771}
1772#endif
1773
1774static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1775{
1776 struct gspca_dev *gspca_dev = file->private_data;
efab8211 1777 struct gspca_frame *frame;
63eb9546
JFM		 1778 struct page *page;
1779 unsigned long addr, start, size;
1780 int i, ret;
63eb9546
JFM		 1781
1782 start = vma->vm_start;
1783 size = vma->vm_end - vma->vm_start;
1784 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1785
e2997a72
HG		 1786 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1787 return -ERESTARTSYS;
63eb9546
JFM		 1788 if (!gspca_dev->present) {
1789 ret = -ENODEV;
4aa0d037
JFM		 1790 goto out;
1791 }
1792 if (gspca_dev->capt_file != file) {
1793 ret = -EINVAL;
1794 goto out;
63eb9546
JFM		 1795 }
1796
efab8211 1797 frame = NULL;
63eb9546
JFM		 1798 for (i = 0; i < gspca_dev->nframes; ++i) {
1799 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1800 PDEBUG(D_STREAM, "mmap bad memory type");
1801 break;
1802 }
1803 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1804 == vma->vm_pgoff) {
1805 frame = &gspca_dev->frame[i];
1806 break;
1807 }
1808 }
efab8211 1809 if (frame == NULL) {
63eb9546
JFM		 1810 PDEBUG(D_STREAM, "mmap no frame buffer found");
1811 ret = -EINVAL;
4aa0d037 1812 goto out;
63eb9546
JFM		 1813 }
1814#ifdef CONFIG_VIDEO_V4L1_COMPAT
ac0d6df6
JFM		 1815 /* v4l1 maps all the buffers */
1816 if (i != 0
1817 || size != frame->v4l2_buf.length * gspca_dev->nframes)
63eb9546 1818#endif
ac0d6df6 1819 if (size != frame->v4l2_buf.length) {
63eb9546
JFM		 1820 PDEBUG(D_STREAM, "mmap bad size");
1821 ret = -EINVAL;
4aa0d037 1822 goto out;
63eb9546
JFM		 1823 }
1824
1825 /*
1826 * - VM_IO marks the area as being a mmaped region for I/O to a
1827 * device. It also prevents the region from being core dumped.
1828 */
1829 vma->vm_flags |= VM_IO;
1830
1831 addr = (unsigned long) frame->data;
1832 while (size > 0) {
1833 page = vmalloc_to_page((void *) addr);
1834 ret = vm_insert_page(vma, start, page);
1835 if (ret < 0)
4aa0d037 1836 goto out;
63eb9546
JFM		 1837 start += PAGE_SIZE;
1838 addr += PAGE_SIZE;
1839 size -= PAGE_SIZE;
1840 }
1841
d50e257e 1842 vma->vm_ops = &gspca_vm_ops;
63eb9546
JFM		 1843 vma->vm_private_data = frame;
1844 gspca_vm_open(vma);
e2997a72 1845 ret = 0;
4aa0d037 1846out:
63eb9546
JFM		 1847 mutex_unlock(&gspca_dev->queue_lock);
1848 return ret;
1849}
1850
63eb9546
JFM		 1851/*
1852 * wait for a video frame
1853 *
1854 * If a frame is ready, its index is returned.
1855 */
d43fa32f 1856static int frame_wait(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1857 int nonblock_ing)
1858{
1859 struct gspca_frame *frame;
1860 int i, j, ret;
1861
d43fa32f 1862 /* check if a frame is ready */
63eb9546
JFM		 1863 i = gspca_dev->fr_o;
1864 j = gspca_dev->fr_queue[i];
1865 frame = &gspca_dev->frame[j];
63eb9546 1866
181b704f
HG		 1867 if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) {
1868 if (nonblock_ing)
1869 return -EAGAIN;
1870
1871 /* wait till a frame is ready */
4aa0d037 1872 ret = wait_event_interruptible_timeout(gspca_dev->wq,
181b704f
HG		 1873 (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) ||
1874 !gspca_dev->streaming || !gspca_dev->present,
1875 msecs_to_jiffies(3000));
1876 if (ret < 0)
1877 return ret;
1878 if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present)
e2997a72 1879 return -EIO;
63eb9546 1880 }
181b704f 1881
63eb9546
JFM		 1882 gspca_dev->fr_o = (i + 1) % gspca_dev->nframes;
1883 PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d",
1884 gspca_dev->fr_q,
1885 gspca_dev->fr_i,
1886 gspca_dev->fr_o);
e2997a72 1887
739570bb
JFM		 1888 if (gspca_dev->sd_desc->dq_callback) {
1889 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1890 gspca_dev->usb_err = 0;
090264e5
JFM		 1891 if (gspca_dev->present)
1892 gspca_dev->sd_desc->dq_callback(gspca_dev);
739570bb
JFM		 1893 mutex_unlock(&gspca_dev->usb_lock);
1894 }
63eb9546
JFM		 1895 return j;
1896}
1897
1898/*
1899 * dequeue a video buffer
1900 *
1901 * If nonblock_ing is false, block until a buffer is available.
1902 */
1903static int vidioc_dqbuf(struct file *file, void *priv,
1904 struct v4l2_buffer *v4l2_buf)
1905{
1906 struct gspca_dev *gspca_dev = priv;
1907 struct gspca_frame *frame;
1908 int i, ret;
1909
1910 PDEBUG(D_FRAM, "dqbuf");
ac0d6df6 1911 if (v4l2_buf->memory != gspca_dev->memory)
63eb9546 1912 return -EINVAL;
5b77ae77 1913
090264e5
JFM		 1914 if (!gspca_dev->present)
1915 return -ENODEV;
1916
5b77ae77
JFM		 1917 /* if not streaming, be sure the application will not loop forever */
1918 if (!(file->f_flags & O_NONBLOCK)
1919 && !gspca_dev->streaming && gspca_dev->users == 1)
63eb9546
JFM		 1920 return -EINVAL;
1921
5b77ae77
JFM		 1922 /* only the capturing file may dequeue */
1923 if (gspca_dev->capt_file != file)
1924 return -EINVAL;
1925
1926 /* only one dequeue / read at a time */
63eb9546
JFM		 1927 if (mutex_lock_interruptible(&gspca_dev->read_lock))
1928 return -ERESTARTSYS;
1929
d43fa32f 1930 ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
63eb9546 1931 if (ret < 0)
4aa0d037 1932 goto out;
63eb9546
JFM		 1933 i = ret; /* frame index */
1934 frame = &gspca_dev->frame[i];
ac0d6df6 1935 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
c6eb8eaf 1936 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
ac0d6df6
JFM		 1937 frame->data,
1938 frame->v4l2_buf.bytesused)) {
1939 PDEBUG(D_ERR|D_STREAM,
1940 "dqbuf cp to user failed");
1941 ret = -EFAULT;
1942 goto out;
1943 }
1944 }
63eb9546
JFM		 1945 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1946 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1947 PDEBUG(D_FRAM, "dqbuf %d", i);
1948 ret = 0;
4aa0d037 1949out:
63eb9546
JFM		 1950 mutex_unlock(&gspca_dev->read_lock);
1951 return ret;
1952}
1953
1954/*
1955 * queue a video buffer
1956 *
1957 * Attempting to queue a buffer that has already been
1958 * queued will return -EINVAL.
1959 */
1960static int vidioc_qbuf(struct file *file, void *priv,
1961 struct v4l2_buffer *v4l2_buf)
1962{
1963 struct gspca_dev *gspca_dev = priv;
1964 struct gspca_frame *frame;
1965 int i, index, ret;
1966
1967 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
63eb9546 1968
5b77ae77
JFM		 1969 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1970 return -ERESTARTSYS;
1971
63eb9546
JFM		 1972 index = v4l2_buf->index;
1973 if ((unsigned) index >= gspca_dev->nframes) {
d43fa32f 1974 PDEBUG(D_FRAM,
63eb9546 1975 "qbuf idx %d >= %d", index, gspca_dev->nframes);
5b77ae77
JFM		 1976 ret = -EINVAL;
1977 goto out;
63eb9546 1978 }
5b77ae77 1979 if (v4l2_buf->memory != gspca_dev->memory) {
d43fa32f 1980 PDEBUG(D_FRAM, "qbuf bad memory type");
5b77ae77
JFM		 1981 ret = -EINVAL;
1982 goto out;
63eb9546 1983 }
e2997a72 1984
5b77ae77 1985 frame = &gspca_dev->frame[index];
d43fa32f
JFM		 1986 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1987 PDEBUG(D_FRAM, "qbuf bad state");
63eb9546
JFM		 1988 ret = -EINVAL;
1989 goto out;
1990 }
1991
1992 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
63eb9546 1993
d43fa32f 1994 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
63eb9546
JFM		 1995 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
1996 frame->v4l2_buf.length = v4l2_buf->length;
1997 }
1998
1999 /* put the buffer in the 'queued' queue */
2000 i = gspca_dev->fr_q;
2001 gspca_dev->fr_queue[i] = index;
8c32aa59
JFM		 2002 if (gspca_dev->fr_i == i)
2003 gspca_dev->cur_frame = frame;
63eb9546
JFM		 2004 gspca_dev->fr_q = (i + 1) % gspca_dev->nframes;
2005 PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d",
2006 gspca_dev->fr_q,
2007 gspca_dev->fr_i,
2008 gspca_dev->fr_o);
2009
2010 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
2011 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
2012 ret = 0;
2013out:
2014 mutex_unlock(&gspca_dev->queue_lock);
2015 return ret;
2016}
2017
d43fa32f
JFM		 2018/*
2019 * allocate the resources for read()
2020 */
2021static int read_alloc(struct gspca_dev *gspca_dev,
2022 struct file *file)
63eb9546 2023{
63eb9546 2024 struct v4l2_buffer v4l2_buf;
d43fa32f 2025 int i, ret;
63eb9546 2026
d43fa32f 2027 PDEBUG(D_STREAM, "read alloc");
63eb9546
JFM		 2028 if (gspca_dev->nframes == 0) {
2029 struct v4l2_requestbuffers rb;
2030
2031 memset(&rb, 0, sizeof rb);
2032 rb.count = gspca_dev->nbufread;
2033 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2034 rb.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2035 ret = vidioc_reqbufs(file, gspca_dev, &rb);
2036 if (ret != 0) {
d43fa32f 2037 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
63eb9546
JFM		 2038 return ret;
2039 }
2040 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2041 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2042 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2043 for (i = 0; i < gspca_dev->nbufread; i++) {
2044 v4l2_buf.index = i;
63eb9546
JFM		 2045 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2046 if (ret != 0) {
2047 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
2048 return ret;
2049 }
2050 }
d43fa32f
JFM		 2051 gspca_dev->memory = GSPCA_MEMORY_READ;
2052 }
4aa0d037 2053
d43fa32f
JFM		 2054 /* start streaming */
2055 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
2056 if (ret != 0)
2057 PDEBUG(D_STREAM, "read streamon err %d", ret);
2058 return ret;
2059}
2060
2061static unsigned int dev_poll(struct file *file, poll_table *wait)
2062{
2063 struct gspca_dev *gspca_dev = file->private_data;
2064 int i, ret;
2065
2066 PDEBUG(D_FRAM, "poll");
2067
2068 poll_wait(file, &gspca_dev->wq, wait);
d43fa32f 2069
5b77ae77
JFM		 2070 /* if reqbufs is not done, the user would use read() */
2071 if (gspca_dev->nframes == 0) {
2072 if (gspca_dev->memory != GSPCA_MEMORY_NO)
2073 return POLLERR; /* not the 1st time */
d43fa32f 2074 ret = read_alloc(gspca_dev, file);
5b77ae77
JFM		 2075 if (ret != 0)
2076 return POLLERR;
63eb9546
JFM		 2077 }
2078
d43fa32f
JFM		 2079 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
2080 return POLLERR;
d43fa32f 2081
5b77ae77 2082 /* check the next incoming buffer */
d43fa32f
JFM		 2083 i = gspca_dev->fr_o;
2084 i = gspca_dev->fr_queue[i];
2085 if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
2086 ret = POLLIN | POLLRDNORM; /* something to read */
2087 else
2088 ret = 0;
d43fa32f 2089 mutex_unlock(&gspca_dev->queue_lock);
090264e5
JFM		 2090 if (!gspca_dev->present)
2091 return POLLHUP;
d43fa32f
JFM		 2092 return ret;
2093}
2094
2095static ssize_t dev_read(struct file *file, char __user *data,
2096 size_t count, loff_t *ppos)
2097{
2098 struct gspca_dev *gspca_dev = file->private_data;
2099 struct gspca_frame *frame;
2100 struct v4l2_buffer v4l2_buf;
2101 struct timeval timestamp;
82643d0e 2102 int n, ret, ret2;
d43fa32f 2103
a9e11134 2104 PDEBUG(D_FRAM, "read (%zd)", count);
d43fa32f
JFM		 2105 if (!gspca_dev->present)
2106 return -ENODEV;
2107 switch (gspca_dev->memory) {
2108 case GSPCA_MEMORY_NO: /* first time */
2109 ret = read_alloc(gspca_dev, file);
2110 if (ret != 0)
2111 return ret;
2112 break;
2113 case GSPCA_MEMORY_READ:
82643d0e
JFM		 2114 if (gspca_dev->capt_file == file)
2115 break;
2116 /* fall thru */
d43fa32f
JFM		 2117 default:
2118 return -EINVAL;
2119 }
2120
63eb9546 2121 /* get a frame */
2f51d00f 2122 timestamp = ktime_to_timeval(ktime_get());
63eb9546 2123 timestamp.tv_sec--;
82643d0e
JFM		 2124 n = 2;
2125 for (;;) {
63eb9546
JFM		 2126 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2127 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2128 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2129 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2130 if (ret != 0) {
2131 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2132 return ret;
2133 }
2134
2135 /* if the process slept for more than 1 second,
219423c1 2136 * get a newer frame */
63eb9546 2137 frame = &gspca_dev->frame[v4l2_buf.index];
82643d0e
JFM		 2138 if (--n < 0)
2139 break; /* avoid infinite loop */
63eb9546
JFM		 2140 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2141 break;
2142 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2143 if (ret != 0) {
2144 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2145 return ret;
2146 }
2147 }
2148
2149 /* copy the frame */
ac0d6df6
JFM		 2150 if (count > frame->v4l2_buf.bytesused)
2151 count = frame->v4l2_buf.bytesused;
63eb9546
JFM		 2152 ret = copy_to_user(data, frame->data, count);
2153 if (ret != 0) {
2154 PDEBUG(D_ERR|D_STREAM,
a9e11134 2155 "read cp to user lack %d / %zd", ret, count);
63eb9546
JFM		 2156 ret = -EFAULT;
2157 goto out;
2158 }
2159 ret = count;
2160out:
2161 /* in each case, requeue the buffer */
2162 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2163 if (ret2 != 0)
2164 return ret2;
2165 return ret;
2166}
2167
bec43661 2168static struct v4l2_file_operations dev_fops = {
63eb9546
JFM		 2169 .owner = THIS_MODULE,
2170 .open = dev_open,
2171 .release = dev_close,
2172 .read = dev_read,
2173 .mmap = dev_mmap,
bec43661 2174 .unlocked_ioctl = video_ioctl2,
63eb9546
JFM		 2175 .poll = dev_poll,
2176};
2177
a399810c 2178static const struct v4l2_ioctl_ops dev_ioctl_ops = {
63eb9546
JFM		 2179 .vidioc_querycap = vidioc_querycap,
2180 .vidioc_dqbuf = vidioc_dqbuf,
2181 .vidioc_qbuf = vidioc_qbuf,
e078770a
MCC		 2182 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2183 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2184 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2185 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
63eb9546
JFM		 2186 .vidioc_streamon = vidioc_streamon,
2187 .vidioc_queryctrl = vidioc_queryctrl,
2188 .vidioc_g_ctrl = vidioc_g_ctrl,
2189 .vidioc_s_ctrl = vidioc_s_ctrl,
f955c4fc
JFM		 2190 .vidioc_g_audio = vidioc_g_audio,
2191 .vidioc_s_audio = vidioc_s_audio,
2192 .vidioc_enumaudio = vidioc_enumaudio,
63eb9546
JFM		 2193 .vidioc_querymenu = vidioc_querymenu,
2194 .vidioc_enum_input = vidioc_enum_input,
2195 .vidioc_g_input = vidioc_g_input,
2196 .vidioc_s_input = vidioc_s_input,
2197 .vidioc_reqbufs = vidioc_reqbufs,
2198 .vidioc_querybuf = vidioc_querybuf,
2199 .vidioc_streamoff = vidioc_streamoff,
2200 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2201 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2202 .vidioc_g_parm = vidioc_g_parm,
2203 .vidioc_s_parm = vidioc_s_parm,
11c635a2 2204 .vidioc_enum_framesizes = vidioc_enum_framesizes,
28ffe77f 2205 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
af1d9afa
BJ		 2206#ifdef CONFIG_VIDEO_ADV_DEBUG
2207 .vidioc_g_register = vidioc_g_register,
2208 .vidioc_s_register = vidioc_s_register,
2209#endif
2210 .vidioc_g_chip_ident = vidioc_g_chip_ident,
63eb9546
JFM		 2211#ifdef CONFIG_VIDEO_V4L1_COMPAT
2212 .vidiocgmbuf = vidiocgmbuf,
2213#endif
2214};
2215
a399810c
HV		 2216static struct video_device gspca_template = {
2217 .name = "gspca main driver",
a399810c
HV		 2218 .fops = &dev_fops,
2219 .ioctl_ops = &dev_ioctl_ops,
d0182306 2220 .release = gspca_release,
a399810c
HV		 2221};
2222
63eb9546
JFM		 2223/*
2224 * probe and create a new gspca device
2225 *
2226 * This function must be called by the sub-driver when it is
2227 * called for probing a new device.
2228 */
2229int gspca_dev_probe(struct usb_interface *intf,
2230 const struct usb_device_id *id,
2231 const struct sd_desc *sd_desc,
d43fa32f
JFM		 2232 int dev_size,
2233 struct module *module)
63eb9546
JFM		 2234{
2235 struct usb_interface_descriptor *interface;
2236 struct gspca_dev *gspca_dev;
2237 struct usb_device *dev = interface_to_usbdev(intf);
2238 int ret;
63eb9546 2239
6a7eba24 2240 PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
63eb9546
JFM		 2241
2242 /* we don't handle multi-config cameras */
0d07e240
JFM		 2243 if (dev->descriptor.bNumConfigurations != 1) {
2244 PDEBUG(D_ERR, "Too many config");
63eb9546 2245 return -ENODEV;
0d07e240 2246 }
52a9d3ef 2247
b7a597d1 2248 /* the USB video interface must be the first one */
63eb9546 2249 interface = &intf->cur_altsetting->desc;
b7a597d1
JFM		 2250 if (dev->config->desc.bNumInterfaces != 1 &&
2251 interface->bInterfaceNumber != 0)
63eb9546
JFM		 2252 return -ENODEV;
2253
2254 /* create the device */
2255 if (dev_size < sizeof *gspca_dev)
2256 dev_size = sizeof *gspca_dev;
2257 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
e293e599 2258 if (!gspca_dev) {
63eb9546 2259 err("couldn't kzalloc gspca struct");
e293e599 2260 return -ENOMEM;
63eb9546 2261 }
8295d99e
JFM		 2262 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2263 if (!gspca_dev->usb_buf) {
2264 err("out of memory");
e293e599 2265 ret = -ENOMEM;
8295d99e
JFM		 2266 goto out;
2267 }
63eb9546
JFM		 2268 gspca_dev->dev = dev;
2269 gspca_dev->iface = interface->bInterfaceNumber;
d43fa32f 2270 gspca_dev->nbalt = intf->num_altsetting;
63eb9546 2271 gspca_dev->sd_desc = sd_desc;
63eb9546 2272 gspca_dev->nbufread = 2;
ff374747 2273 gspca_dev->empty_packet = -1; /* don't check the empty packets */
63eb9546 2274
012d6b02 2275 /* configure the subdriver and initialize the USB device */
ba38ee8e 2276 ret = sd_desc->config(gspca_dev, id);
012d6b02
JFM		 2277 if (ret < 0)
2278 goto out;
ba38ee8e 2279 ret = sd_desc->init(gspca_dev);
63eb9546
JFM		 2280 if (ret < 0)
2281 goto out;
2282 gspca_set_default_mode(gspca_dev);
2283
10ee2402
HG		 2284 ret = gspca_input_connect(gspca_dev);
2285 if (ret)
2286 goto out;
2287
63eb9546
JFM		 2288 mutex_init(&gspca_dev->usb_lock);
2289 mutex_init(&gspca_dev->read_lock);
2290 mutex_init(&gspca_dev->queue_lock);
2291 init_waitqueue_head(&gspca_dev->wq);
2292
2293 /* init video stuff */
ba38ee8e 2294 memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
24441631 2295 gspca_dev->vdev.parent = &intf->dev;
5c4fa002 2296 gspca_dev->module = module;
ee56a4d3 2297 gspca_dev->present = 1;
a12ca6a6 2298 ret = video_register_device(&gspca_dev->vdev,
63eb9546 2299 VFL_TYPE_GRABBER,
8d584a53 2300 -1);
63eb9546
JFM		 2301 if (ret < 0) {
2302 err("video_register_device err %d", ret);
2303 goto out;
2304 }
2305
63eb9546 2306 usb_set_intfdata(intf, gspca_dev);
38c7c036 2307 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
0274d42e 2308
10ee2402 2309 gspca_input_create_urb(gspca_dev);
0274d42e 2310
63eb9546
JFM		 2311 return 0;
2312out:
e7637521 2313#ifdef CONFIG_INPUT
10ee2402
HG		 2314 if (gspca_dev->input_dev)
2315 input_unregister_device(gspca_dev->input_dev);
e7637521 2316#endif
e07a1d8a
JFM		 2317 kfree(gspca_dev->usb_buf);
2318 kfree(gspca_dev);
63eb9546
JFM		 2319 return ret;
2320}
2321EXPORT_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 */
2329void gspca_disconnect(struct usb_interface *intf)
2330{
4aa0d037 2331 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
e070bf9e 2332#ifdef CONFIG_INPUT
0274d42e 2333 struct input_dev *input_dev;
e070bf9e 2334#endif
63eb9546 2335
38c7c036
LP		 2336 PDEBUG(D_PROBE, "%s disconnect",
2337 video_device_node_name(&gspca_dev->vdev));
ad28127d 2338 mutex_lock(&gspca_dev->usb_lock);
6e4ae872 2339 gspca_dev->present = 0;
6e4ae872 2340
090264e5
JFM		 2341 if (gspca_dev->streaming) {
2342 destroy_urbs(gspca_dev);
2343 wake_up_interruptible(&gspca_dev->wq);
2344 }
2345
e070bf9e 2346#ifdef CONFIG_INPUT
0274d42e
MN		 2347 gspca_input_destroy_urb(gspca_dev);
2348 input_dev = gspca_dev->input_dev;
2349 if (input_dev) {
2350 gspca_dev->input_dev = NULL;
2351 input_unregister_device(input_dev);
2352 }
e070bf9e 2353#endif
0274d42e 2354
090264e5 2355 /* the device is freed at exit of this function */
ad28127d 2356 gspca_dev->dev = NULL;
090264e5
JFM		 2357 mutex_unlock(&gspca_dev->usb_lock);
2358
6b060ffe
FZ		 2359 usb_set_intfdata(intf, NULL);
2360
a12ca6a6
JFM		 2361 /* release the device */
2362 /* (this will call gspca_release() immediatly or on last close) */
2363 video_unregister_device(&gspca_dev->vdev);
3145b8c1 2364
0d07e240 2365/* PDEBUG(D_PROBE, "disconnect complete"); */
63eb9546
JFM		 2366}
2367EXPORT_SYMBOL(gspca_disconnect);
2368
6a709749
JFM		 2369#ifdef CONFIG_PM
2370int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2371{
2372 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2373
2374 if (!gspca_dev->streaming)
2375 return 0;
2376 gspca_dev->frozen = 1; /* avoid urb error messages */
012d6b02
JFM		 2377 if (gspca_dev->sd_desc->stopN)
2378 gspca_dev->sd_desc->stopN(gspca_dev);
6a709749 2379 destroy_urbs(gspca_dev);
0274d42e 2380 gspca_input_destroy_urb(gspca_dev);
6a709749 2381 gspca_set_alt0(gspca_dev);
012d6b02
JFM		 2382 if (gspca_dev->sd_desc->stop0)
2383 gspca_dev->sd_desc->stop0(gspca_dev);
6a709749
JFM		 2384 return 0;
2385}
2386EXPORT_SYMBOL(gspca_suspend);
2387
2388int gspca_resume(struct usb_interface *intf)
2389{
2390 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2391
2392 gspca_dev->frozen = 0;
012d6b02 2393 gspca_dev->sd_desc->init(gspca_dev);
0274d42e 2394 gspca_input_create_urb(gspca_dev);
012d6b02
JFM		 2395 if (gspca_dev->streaming)
2396 return gspca_init_transfer(gspca_dev);
1e89e2da 2397 return 0;
6a709749
JFM		 2398}
2399EXPORT_SYMBOL(gspca_resume);
2400#endif
dcef3237
HG		 2401/* -- cam driver utility functions -- */
2402
2403/* auto gain and exposure algorithm based on the knee algorithm described here:
2404 http://ytse.tricolour.net/docs/LowLightOptimization.html
2405
2406 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2407 where changed. */
2408int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2409 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2410{
2411 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2412 const struct ctrl *gain_ctrl = NULL;
2413 const struct ctrl *exposure_ctrl = NULL;
2414 const struct ctrl *autogain_ctrl = NULL;
2415 int retval = 0;
2416
2417 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
26984b09
HG		 2418 if (gspca_dev->ctrl_dis & (1 << i))
2419 continue;
dcef3237
HG		 2420 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2421 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2422 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2423 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2424 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2425 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2426 }
2427 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2428 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2429 "on cam without (auto)gain/exposure");
2430 return 0;
2431 }
2432
2433 if (gain_ctrl->get(gspca_dev, &gain) ||
2434 exposure_ctrl->get(gspca_dev, &exposure) ||
2435 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2436 return 0;
2437
2438 orig_gain = gain;
2439 orig_exposure = exposure;
2440
2441 /* If we are of a multiple of deadzone, do multiple steps to reach the
2442 desired lumination fast (with the risc of a slight overshoot) */
2443 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2444
1c44d81d 2445 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
dcef3237
HG		 2446 avg_lum, desired_avg_lum, steps);
2447
2448 for (i = 0; i < steps; i++) {
2449 if (avg_lum > desired_avg_lum) {
2450 if (gain > gain_knee)
2451 gain--;
2452 else if (exposure > exposure_knee)
2453 exposure--;
2454 else if (gain > gain_ctrl->qctrl.default_value)
2455 gain--;
2456 else if (exposure > exposure_ctrl->qctrl.minimum)
2457 exposure--;
2458 else if (gain > gain_ctrl->qctrl.minimum)
2459 gain--;
2460 else
2461 break;
2462 } else {
2463 if (gain < gain_ctrl->qctrl.default_value)
2464 gain++;
2465 else if (exposure < exposure_knee)
2466 exposure++;
2467 else if (gain < gain_knee)
2468 gain++;
2469 else if (exposure < exposure_ctrl->qctrl.maximum)
2470 exposure++;
2471 else if (gain < gain_ctrl->qctrl.maximum)
2472 gain++;
2473 else
2474 break;
2475 }
2476 }
2477
2478 if (gain != orig_gain) {
2479 gain_ctrl->set(gspca_dev, gain);
2480 retval = 1;
2481 }
2482 if (exposure != orig_exposure) {
2483 exposure_ctrl->set(gspca_dev, exposure);
2484 retval = 1;
2485 }
2486
2487 return retval;
2488}
2489EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2490
63eb9546
JFM		 2491/* -- module insert / remove -- */
2492static int __init gspca_init(void)
2493{
bb64e86c
JFM		 2494 info("main v%d.%d.%d registered",
2495 (DRIVER_VERSION_NUMBER >> 16) & 0xff,
2496 (DRIVER_VERSION_NUMBER >> 8) & 0xff,
2497 DRIVER_VERSION_NUMBER & 0xff);
63eb9546
JFM		 2498 return 0;
2499}
2500static void __exit gspca_exit(void)
2501{
2502 info("main deregistered");
2503}
2504
2505module_init(gspca_init);
2506module_exit(gspca_exit);
2507
335b3f88 2508#ifdef GSPCA_DEBUG
63eb9546
JFM		 2509module_param_named(debug, gspca_debug, int, 0644);
2510MODULE_PARM_DESC(debug,
2511 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
d43fa32f
JFM		 2512 " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout"
2513 " 0x0100: v4l2");
6a7eba24 2514#endif
Linux kernel - Deliverables
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