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[media] gspca - main: Check the isoc packet status before its length
[linux-2.6-block.git] / drivers / media / video / gspca / gspca.c
CommitLineData
63eb9546
JFM		 1/*
2 * Main USB camera driver
3 *
27c6f9e5 4 * Copyright (C) 2008-2010 Jean-François 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
f7628015 43#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
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
27c6f9e5 54MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
63eb9546
JFM		 55MODULE_DESCRIPTION("GSPCA USB Camera Driver");
56MODULE_LICENSE("GPL");
57
0b8851b6 58#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 11, 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 */
f7628015 118#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 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)
0b656321 151 err("Resubmit URB failed with error %i", ret);
0274d42e
MN		 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) {
0b656321
JFM		 180 err("Input device registration failed with error %i",
181 err);
0274d42e
MN		 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
b26d6e21 202 buffer_len = le16_to_cpu(ep->wMaxPacketSize);
0274d42e 203 interval = ep->bInterval;
c4dc692c 204 PDEBUG(D_CONF, "found int in endpoint: 0x%x, "
0274d42e
MN		 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
7a9b1492 216 buffer = usb_alloc_coherent(dev, buffer_len,
0274d42e
MN		 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);
882787ff 226 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
0274d42e
MN		 227 ret = usb_submit_urb(urb, GFP_KERNEL);
228 if (ret < 0) {
c4dc692c 229 PDEBUG(D_ERR, "submit int URB failed with error %i", ret);
0274d42e
MN		 230 goto error_submit;
231 }
2661da47 232 gspca_dev->int_urb = urb;
0274d42e
MN		 233 return ret;
234
235error_submit:
997ea58e
DM		 236 usb_free_coherent(dev,
237 urb->transfer_buffer_length,
238 urb->transfer_buffer,
239 urb->transfer_dma);
0274d42e
MN		 240error_buffer:
241 usb_free_urb(urb);
242error:
243 return ret;
244}
245
10ee2402 246static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
0274d42e 247{
0274d42e
MN		 248 struct usb_interface *intf;
249 struct usb_host_interface *intf_desc;
250 struct usb_endpoint_descriptor *ep;
251 int i;
252
253 if (gspca_dev->sd_desc->int_pkt_scan) {
254 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
255 intf_desc = intf->cur_altsetting;
256 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
257 ep = &intf_desc->endpoint[i].desc;
258 if (usb_endpoint_dir_in(ep) &&
259 usb_endpoint_xfer_int(ep)) {
260
10ee2402 261 alloc_and_submit_int_urb(gspca_dev, ep);
0274d42e
MN		 262 break;
263 }
264 }
265 }
0274d42e
MN		 266}
267
268static 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);
997ea58e
DM		 276 usb_free_coherent(gspca_dev->dev,
277 urb->transfer_buffer_length,
278 urb->transfer_buffer,
279 urb->transfer_dma);
0274d42e
MN		 280 usb_free_urb(urb);
281 }
282}
f7628015
RD		 283#else
284static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
285{
286}
287
288static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
289{
290}
291
292static inline int gspca_input_connect(struct gspca_dev *dev)
293{
294 return 0;
295}
0274d42e
MN		 296#endif
297
63eb9546 298/*
d43fa32f 299 * fill a video frame from an URB and resubmit
63eb9546 300 */
d43fa32f
JFM		 301static void fill_frame(struct gspca_dev *gspca_dev,
302 struct urb *urb)
63eb9546 303{
8d584a53 304 u8 *data; /* address of data in the iso message */
1b60e1ad 305 int i, len, st;
63eb9546
JFM		 306 cam_pkt_op pkt_scan;
307
6a7eba24 308 if (urb->status != 0) {
090264e5
JFM		 309 if (urb->status == -ESHUTDOWN)
310 return; /* disconnection */
62ee8eee 311#ifdef CONFIG_PM
6a540bdf
HG		 312 if (gspca_dev->frozen)
313 return;
62ee8eee 314#endif
6a540bdf 315 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
8157852f 316 urb->status = 0;
bf926adf 317 goto resubmit;
6a7eba24 318 }
63eb9546
JFM		 319 pkt_scan = gspca_dev->sd_desc->pkt_scan;
320 for (i = 0; i < urb->number_of_packets; i++) {
321
63eb9546 322 /* check the packet status and length */
63eb9546
JFM		 323 st = urb->iso_frame_desc[i].status;
324 if (st) {
0b656321 325 err("ISOC data error: [%d] len=%d, status=%d",
63eb9546
JFM		 326 i, len, st);
327 gspca_dev->last_packet_type = DISCARD_PACKET;
328 continue;
329 }
76ebc16b
JFM		 330 len = urb->iso_frame_desc[i].actual_length;
331 if (len == 0) {
332 if (gspca_dev->empty_packet == 0)
333 gspca_dev->empty_packet = 1;
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)
0b656321 349 err("usb_submit_urb() ret %d", st);
63eb9546
JFM		 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)
0b656321 403 err("usb_submit_urb() ret %d", st);
dff369aa 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 428
63eb9546 429 if (packet_type == FIRST_PACKET) {
f7059eaa
JFM		 430 i = atomic_read(&gspca_dev->fr_i);
431
432 /* if there are no queued buffer, discard the whole frame */
433 if (i == atomic_read(&gspca_dev->fr_q)) {
434 gspca_dev->last_packet_type = DISCARD_PACKET;
2e0544a8 435 gspca_dev->sequence++;
f7059eaa
JFM		 436 return;
437 }
b192ca98
JFM		 438 j = gspca_dev->fr_queue[i];
439 frame = &gspca_dev->frame[j];
2f51d00f 440 frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
2e0544a8 441 frame->v4l2_buf.sequence = gspca_dev->sequence++;
f7059eaa 442 gspca_dev->image = frame->data;
b192ca98 443 gspca_dev->image_len = 0;
fe988f56
JFM		 444 } else {
445 switch (gspca_dev->last_packet_type) {
446 case DISCARD_PACKET:
447 if (packet_type == LAST_PACKET)
448 gspca_dev->last_packet_type = packet_type;
449 return;
450 case LAST_PACKET:
451 return;
452 }
d43fa32f 453 }
63eb9546 454
d43fa32f 455 /* append the packet to the frame buffer */
63eb9546 456 if (len > 0) {
b192ca98
JFM		 457 if (gspca_dev->image_len + len > gspca_dev->frsz) {
458 PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d",
459 gspca_dev->image_len + len,
460 gspca_dev->frsz);
63eb9546
JFM		 461 packet_type = DISCARD_PACKET;
462 } else {
fe988f56
JFM		 463/* !! image is NULL only when last pkt is LAST or DISCARD
464 if (gspca_dev->image == NULL) {
465 err("gspca_frame_add() image == NULL");
466 return;
467 }
468 */
b192ca98
JFM		 469 memcpy(gspca_dev->image + gspca_dev->image_len,
470 data, len);
471 gspca_dev->image_len += len;
63eb9546
JFM		 472 }
473 }
474 gspca_dev->last_packet_type = packet_type;
475
f7059eaa
JFM		 476 /* if last packet, invalidate packet concatenation until
477 * next first packet, wake up the application and advance
478 * in the queue */
63eb9546 479 if (packet_type == LAST_PACKET) {
f7059eaa 480 i = atomic_read(&gspca_dev->fr_i);
b192ca98
JFM		 481 j = gspca_dev->fr_queue[i];
482 frame = &gspca_dev->frame[j];
483 frame->v4l2_buf.bytesused = gspca_dev->image_len;
02bbcb9d
JFM		 484 frame->v4l2_buf.flags = (frame->v4l2_buf.flags
485 | V4L2_BUF_FLAG_DONE)
486 & ~V4L2_BUF_FLAG_QUEUED;
f7059eaa
JFM		 487 i = (i + 1) % GSPCA_MAX_FRAMES;
488 atomic_set(&gspca_dev->fr_i, i);
63eb9546 489 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
f7059eaa
JFM		 490 PDEBUG(D_FRAM, "frame complete len:%d",
491 frame->v4l2_buf.bytesused);
492 gspca_dev->image = NULL;
493 gspca_dev->image_len = 0;
63eb9546 494 }
63eb9546
JFM		 495}
496EXPORT_SYMBOL(gspca_frame_add);
497
498static int gspca_is_compressed(__u32 format)
499{
500 switch (format) {
501 case V4L2_PIX_FMT_MJPEG:
502 case V4L2_PIX_FMT_JPEG:
50a871fe 503 case V4L2_PIX_FMT_SPCA561:
ab8f12cf 504 case V4L2_PIX_FMT_PAC207:
d661e622 505 case V4L2_PIX_FMT_MR97310A:
63eb9546
JFM		 506 return 1;
507 }
508 return 0;
509}
510
63eb9546 511static int frame_alloc(struct gspca_dev *gspca_dev,
d43fa32f 512 unsigned int count)
63eb9546 513{
d43fa32f
JFM		 514 struct gspca_frame *frame;
515 unsigned int frsz;
516 int i;
63eb9546 517
c2446b3e
JFM		 518 i = gspca_dev->curr_mode;
519 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
63eb9546 520 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
63eb9546 521 frsz = PAGE_ALIGN(frsz);
63eb9546 522 gspca_dev->frsz = frsz;
f7059eaa
JFM		 523 if (count >= GSPCA_MAX_FRAMES)
524 count = GSPCA_MAX_FRAMES - 1;
e795d912 525 gspca_dev->frbuf = vmalloc_32(frsz * count);
ac0d6df6
JFM		 526 if (!gspca_dev->frbuf) {
527 err("frame alloc failed");
528 return -ENOMEM;
63eb9546
JFM		 529 }
530 gspca_dev->nframes = count;
531 for (i = 0; i < count; i++) {
d43fa32f
JFM		 532 frame = &gspca_dev->frame[i];
533 frame->v4l2_buf.index = i;
534 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
535 frame->v4l2_buf.flags = 0;
536 frame->v4l2_buf.field = V4L2_FIELD_NONE;
537 frame->v4l2_buf.length = frsz;
538 frame->v4l2_buf.memory = gspca_dev->memory;
539 frame->v4l2_buf.sequence = 0;
b192ca98 540 frame->data = gspca_dev->frbuf + i * frsz;
ac0d6df6 541 frame->v4l2_buf.m.offset = i * frsz;
63eb9546 542 }
f7059eaa
JFM		 543 atomic_set(&gspca_dev->fr_q, 0);
544 atomic_set(&gspca_dev->fr_i, 0);
545 gspca_dev->fr_o = 0;
d43fa32f 546 return 0;
63eb9546
JFM		 547}
548
549static void frame_free(struct gspca_dev *gspca_dev)
550{
551 int i;
552
553 PDEBUG(D_STREAM, "frame free");
efab8211 554 if (gspca_dev->frbuf != NULL) {
e795d912 555 vfree(gspca_dev->frbuf);
63eb9546
JFM		 556 gspca_dev->frbuf = NULL;
557 for (i = 0; i < gspca_dev->nframes; i++)
558 gspca_dev->frame[i].data = NULL;
559 }
560 gspca_dev->nframes = 0;
561}
562
d43fa32f 563static void destroy_urbs(struct gspca_dev *gspca_dev)
63eb9546
JFM		 564{
565 struct urb *urb;
566 unsigned int i;
567
568 PDEBUG(D_STREAM, "kill transfer");
44732819 569 for (i = 0; i < MAX_NURBS; i++) {
4aa0d037 570 urb = gspca_dev->urb[i];
63eb9546 571 if (urb == NULL)
d43fa32f 572 break;
63eb9546 573
4aa0d037 574 gspca_dev->urb[i] = NULL;
090264e5 575 usb_kill_urb(urb);
efab8211 576 if (urb->transfer_buffer != NULL)
997ea58e
DM		 577 usb_free_coherent(gspca_dev->dev,
578 urb->transfer_buffer_length,
579 urb->transfer_buffer,
580 urb->transfer_dma);
63eb9546
JFM		 581 usb_free_urb(urb);
582 }
63eb9546
JFM		 583}
584
e4dac289
JFM		 585static int gspca_set_alt0(struct gspca_dev *gspca_dev)
586{
587 int ret;
588
589 if (gspca_dev->alt == 0)
590 return 0;
591 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
592 if (ret < 0)
0b656321 593 err("set alt 0 err %d", ret);
e4dac289
JFM		 594 return ret;
595}
596
597/* Note: both the queue and the usb locks should be held when calling this */
598static void gspca_stream_off(struct gspca_dev *gspca_dev)
599{
600 gspca_dev->streaming = 0;
601 if (gspca_dev->present) {
602 if (gspca_dev->sd_desc->stopN)
603 gspca_dev->sd_desc->stopN(gspca_dev);
604 destroy_urbs(gspca_dev);
605 gspca_input_destroy_urb(gspca_dev);
606 gspca_set_alt0(gspca_dev);
607 gspca_input_create_urb(gspca_dev);
608 }
609
610 /* always call stop0 to free the subdriver's resources */
611 if (gspca_dev->sd_desc->stop0)
612 gspca_dev->sd_desc->stop0(gspca_dev);
613 PDEBUG(D_STREAM, "stream off OK");
614}
615
63eb9546 616/*
219423c1 617 * look for an input transfer endpoint in an alternate setting
63eb9546 618 */
0be01004 619static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
6929dc6b 620 int xfer)
63eb9546
JFM		 621{
622 struct usb_host_endpoint *ep;
623 int i, attr;
624
63eb9546
JFM		 625 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
626 ep = &alt->endpoint[i];
50e06dee 627 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
30d35e49
JFM		 628 if (attr == xfer
629 && ep->desc.wMaxPacketSize != 0)
50e06dee 630 return ep;
63eb9546
JFM		 631 }
632 return NULL;
633}
634
635/*
219423c1 636 * look for an input (isoc or bulk) endpoint
63eb9546
JFM		 637 *
638 * The endpoint is defined by the subdriver.
639 * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
640 * This routine may be called many times when the bandwidth is too small
641 * (the bandwidth is checked on urb submit).
642 */
0be01004 643static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
63eb9546
JFM		 644{
645 struct usb_interface *intf;
646 struct usb_host_endpoint *ep;
6929dc6b 647 int xfer, i, ret;
63eb9546
JFM		 648
649 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
6a7eba24 650 ep = NULL;
6929dc6b
JFM		 651 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
652 : USB_ENDPOINT_XFER_ISOC;
63eb9546 653 i = gspca_dev->alt; /* previous alt setting */
a511ba94
HG		 654 if (gspca_dev->cam.reverse_alts) {
655 while (++i < gspca_dev->nbalt) {
656 ep = alt_xfer(&intf->altsetting[i], xfer);
657 if (ep)
658 break;
659 }
660 } else {
661 while (--i >= 0) {
662 ep = alt_xfer(&intf->altsetting[i], xfer);
663 if (ep)
664 break;
665 }
63eb9546 666 }
6a7eba24 667 if (ep == NULL) {
6929dc6b
JFM		 668 err("no transfer endpoint found");
669 return NULL;
63eb9546 670 }
0be01004 671 PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
63eb9546 672 i, ep->desc.bEndpointAddress);
1c8336d3 673 gspca_dev->alt = i; /* memorize the current alt setting */
8dd07ef1 674 if (gspca_dev->nbalt > 1) {
95d9142c
JFM		 675 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
676 if (ret < 0) {
6929dc6b 677 err("set alt %d err %d", i, ret);
0274d42e 678 ep = NULL;
95d9142c 679 }
63eb9546 680 }
63eb9546
JFM		 681 return ep;
682}
683
684/*
0be01004 685 * create the URBs for image transfer
63eb9546
JFM		 686 */
687static int create_urbs(struct gspca_dev *gspca_dev,
688 struct usb_host_endpoint *ep)
689{
690 struct urb *urb;
d43fa32f 691 int n, nurbs, i, psize, npkt, bsize;
63eb9546
JFM		 692
693 /* calculate the packet size and the number of packets */
63eb9546 694 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
d43fa32f 695
6929dc6b 696 if (!gspca_dev->cam.bulk) { /* isoc */
95d9142c
JFM		 697
698 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
1f53b0b0
JFM		 699 if (gspca_dev->pkt_size == 0)
700 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
701 else
702 psize = gspca_dev->pkt_size;
49cb6b04
JFM		 703 npkt = gspca_dev->cam.npkt;
704 if (npkt == 0)
705 npkt = 32; /* default value */
0be01004
JFM		 706 bsize = psize * npkt;
707 PDEBUG(D_STREAM,
708 "isoc %d pkts size %d = bsize:%d",
709 npkt, psize, bsize);
51977a8d 710 nurbs = DEF_NURBS;
95d9142c 711 } else { /* bulk */
0be01004 712 npkt = 0;
dff369aa 713 bsize = gspca_dev->cam.bulk_size;
95d9142c
JFM		 714 if (bsize == 0)
715 bsize = psize;
0be01004 716 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
dff369aa
AO		 717 if (gspca_dev->cam.bulk_nurbs != 0)
718 nurbs = gspca_dev->cam.bulk_nurbs;
719 else
720 nurbs = 1;
0be01004
JFM		 721 }
722
d43fa32f 723 for (n = 0; n < nurbs; n++) {
63eb9546
JFM		 724 urb = usb_alloc_urb(npkt, GFP_KERNEL);
725 if (!urb) {
726 err("usb_alloc_urb failed");
727 return -ENOMEM;
728 }
db870875 729 gspca_dev->urb[n] = urb;
997ea58e 730 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
63eb9546
JFM		 731 bsize,
732 GFP_KERNEL,
733 &urb->transfer_dma);
734
4aa0d037 735 if (urb->transfer_buffer == NULL) {
997ea58e 736 err("usb_alloc_coherent failed");
63eb9546
JFM		 737 return -ENOMEM;
738 }
63eb9546
JFM		 739 urb->dev = gspca_dev->dev;
740 urb->context = gspca_dev;
63eb9546 741 urb->transfer_buffer_length = bsize;
0be01004
JFM		 742 if (npkt != 0) { /* ISOC */
743 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
744 ep->desc.bEndpointAddress);
6c49da7f
FZ		 745 urb->transfer_flags = URB_ISO_ASAP
746 | URB_NO_TRANSFER_DMA_MAP;
0be01004
JFM		 747 urb->interval = ep->desc.bInterval;
748 urb->complete = isoc_irq;
749 urb->number_of_packets = npkt;
750 for (i = 0; i < npkt; i++) {
751 urb->iso_frame_desc[i].length = psize;
752 urb->iso_frame_desc[i].offset = psize * i;
753 }
754 } else { /* bulk */
755 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
a23c1947 756 ep->desc.bEndpointAddress);
6c49da7f 757 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
0be01004 758 urb->complete = bulk_irq;
63eb9546
JFM		 759 }
760 }
761 return 0;
762}
763
764/*
765 * start the USB transfer
766 */
767static int gspca_init_transfer(struct gspca_dev *gspca_dev)
768{
63eb9546 769 struct usb_host_endpoint *ep;
db870875 770 struct urb *urb;
63eb9546
JFM		 771 int n, ret;
772
e2997a72
HG		 773 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
774 return -ERESTARTSYS;
63eb9546 775
090264e5
JFM		 776 if (!gspca_dev->present) {
777 ret = -ENODEV;
314b3e08 778 goto unlock;
090264e5
JFM		 779 }
780
f7059eaa
JFM		 781 /* reset the streaming variables */
782 gspca_dev->image = NULL;
783 gspca_dev->image_len = 0;
784 gspca_dev->last_packet_type = DISCARD_PACKET;
785 gspca_dev->sequence = 0;
786
ab6c8cf2
JFM		 787 gspca_dev->usb_err = 0;
788
d43fa32f
JFM		 789 /* set the higher alternate setting and
790 * loop until urb submit succeeds */
a511ba94
HG		 791 if (gspca_dev->cam.reverse_alts)
792 gspca_dev->alt = 0;
793 else
794 gspca_dev->alt = gspca_dev->nbalt;
795
1f53b0b0
JFM		 796 if (gspca_dev->sd_desc->isoc_init) {
797 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
798 if (ret < 0)
314b3e08 799 goto unlock;
1f53b0b0 800 }
314b3e08
HG		 801
802 gspca_input_destroy_urb(gspca_dev);
1f53b0b0
JFM		 803 ep = get_ep(gspca_dev);
804 if (ep == NULL) {
805 ret = -EIO;
806 goto out;
807 }
63eb9546 808 for (;;) {
47aaca96
JFM		 809 if (!gspca_dev->cam.no_urb_create) {
810 PDEBUG(D_STREAM, "init transfer alt %d",
811 gspca_dev->alt);
812 ret = create_urbs(gspca_dev, ep);
813 if (ret < 0) {
814 destroy_urbs(gspca_dev);
815 goto out;
816 }
db870875 817 }
63eb9546 818
8fe2f1d5 819 /* clear the bulk endpoint */
6929dc6b 820 if (gspca_dev->cam.bulk)
8fe2f1d5 821 usb_clear_halt(gspca_dev->dev,
50e06dee 822 gspca_dev->urb[0]->pipe);
8fe2f1d5 823
63eb9546 824 /* start the cam */
72ab97ce
JFM		 825 ret = gspca_dev->sd_desc->start(gspca_dev);
826 if (ret < 0) {
827 destroy_urbs(gspca_dev);
828 goto out;
829 }
63eb9546 830 gspca_dev->streaming = 1;
63eb9546 831
dff369aa 832 /* some bulk transfers are started by the subdriver */
6929dc6b 833 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
51977a8d
JFM		 834 break;
835
63eb9546 836 /* submit the URBs */
db870875
JFM		 837 for (n = 0; n < MAX_NURBS; n++) {
838 urb = gspca_dev->urb[n];
839 if (urb == NULL)
840 break;
841 ret = usb_submit_urb(urb, GFP_KERNEL);
1f53b0b0
JFM		 842 if (ret < 0)
843 break;
63eb9546
JFM		 844 }
845 if (ret >= 0)
846 break;
e4dac289 847 gspca_stream_off(gspca_dev);
4bdf4a83 848 if (ret != -ENOSPC) {
0b656321 849 err("usb_submit_urb alt %d err %d",
4bdf4a83 850 gspca_dev->alt, ret);
1f53b0b0 851 goto out;
4bdf4a83 852 }
1f53b0b0
JFM		 853
854 /* the bandwidth is not wide enough
855 * negociate or try a lower alternate setting */
4bdf4a83
JFM		 856 PDEBUG(D_ERR|D_STREAM,
857 "bandwidth not wide enough - trying again");
1f53b0b0
JFM		 858 msleep(20); /* wait for kill complete */
859 if (gspca_dev->sd_desc->isoc_nego) {
860 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
861 if (ret < 0)
862 goto out;
863 } else {
864 ep = get_ep(gspca_dev);
865 if (ep == NULL) {
866 ret = -EIO;
867 goto out;
868 }
869 }
63eb9546
JFM		 870 }
871out:
314b3e08
HG		 872 gspca_input_create_urb(gspca_dev);
873unlock:
63eb9546
JFM		 874 mutex_unlock(&gspca_dev->usb_lock);
875 return ret;
876}
877
d43fa32f 878static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
63eb9546 879{
6a33091f 880 struct gspca_ctrl *ctrl;
63eb9546
JFM		 881 int i;
882
883 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
884 gspca_dev->curr_mode = i;
885 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
886 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
c2446b3e 887 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
6a33091f
JFM		 888
889 /* set the current control values to their default values
890 * which may have changed in sd_init() */
891 ctrl = gspca_dev->cam.ctrls;
892 if (ctrl != NULL) {
893 for (i = 0;
894 i < gspca_dev->sd_desc->nctrls;
895 i++, ctrl++)
896 ctrl->val = ctrl->def;
897 }
63eb9546
JFM		 898}
899
900static int wxh_to_mode(struct gspca_dev *gspca_dev,
901 int width, int height)
902{
903 int i;
904
d43fa32f
JFM		 905 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
906 if (width >= gspca_dev->cam.cam_mode[i].width
907 && height >= gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 908 break;
909 }
63eb9546
JFM		 910 return i;
911}
912
63eb9546
JFM		 913/*
914 * search a mode with the right pixel format
915 */
916static int gspca_get_mode(struct gspca_dev *gspca_dev,
917 int mode,
918 int pixfmt)
919{
920 int modeU, modeD;
921
922 modeU = modeD = mode;
923 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
924 if (--modeD >= 0) {
c2446b3e
JFM		 925 if (gspca_dev->cam.cam_mode[modeD].pixelformat
926 == pixfmt)
63eb9546
JFM		 927 return modeD;
928 }
929 if (++modeU < gspca_dev->cam.nmodes) {
c2446b3e
JFM		 930 if (gspca_dev->cam.cam_mode[modeU].pixelformat
931 == pixfmt)
63eb9546
JFM		 932 return modeU;
933 }
934 }
935 return -EINVAL;
936}
937
af1d9afa
BJ		 938#ifdef CONFIG_VIDEO_ADV_DEBUG
939static int vidioc_g_register(struct file *file, void *priv,
940 struct v4l2_dbg_register *reg)
941{
942 int ret;
943 struct gspca_dev *gspca_dev = priv;
944
945 if (!gspca_dev->sd_desc->get_chip_ident)
946 return -EINVAL;
947
948 if (!gspca_dev->sd_desc->get_register)
949 return -EINVAL;
950
951 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
952 return -ERESTARTSYS;
8c4ebae4 953 gspca_dev->usb_err = 0;
af1d9afa
BJ		 954 if (gspca_dev->present)
955 ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
956 else
957 ret = -ENODEV;
958 mutex_unlock(&gspca_dev->usb_lock);
959
960 return ret;
961}
962
963static int vidioc_s_register(struct file *file, void *priv,
964 struct v4l2_dbg_register *reg)
965{
966 int ret;
967 struct gspca_dev *gspca_dev = priv;
968
969 if (!gspca_dev->sd_desc->get_chip_ident)
970 return -EINVAL;
971
972 if (!gspca_dev->sd_desc->set_register)
973 return -EINVAL;
974
975 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
976 return -ERESTARTSYS;
8c4ebae4 977 gspca_dev->usb_err = 0;
af1d9afa
BJ		 978 if (gspca_dev->present)
979 ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
980 else
981 ret = -ENODEV;
982 mutex_unlock(&gspca_dev->usb_lock);
983
984 return ret;
985}
986#endif
987
988static int vidioc_g_chip_ident(struct file *file, void *priv,
989 struct v4l2_dbg_chip_ident *chip)
990{
991 int ret;
992 struct gspca_dev *gspca_dev = priv;
993
994 if (!gspca_dev->sd_desc->get_chip_ident)
995 return -EINVAL;
996
997 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
998 return -ERESTARTSYS;
8c4ebae4 999 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1000 if (gspca_dev->present)
1001 ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
1002 else
1003 ret = -ENODEV;
1004 mutex_unlock(&gspca_dev->usb_lock);
1005
1006 return ret;
1007}
1008
e078770a 1009static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1010 struct v4l2_fmtdesc *fmtdesc)
1011{
1012 struct gspca_dev *gspca_dev = priv;
6a7eba24 1013 int i, j, index;
63eb9546
JFM		 1014 __u32 fmt_tb[8];
1015
63eb9546
JFM		 1016 /* give an index to each format */
1017 index = 0;
1018 j = 0;
1019 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
c2446b3e 1020 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
63eb9546
JFM		 1021 j = 0;
1022 for (;;) {
1023 if (fmt_tb[j] == fmt_tb[index])
1024 break;
1025 j++;
1026 }
1027 if (j == index) {
1028 if (fmtdesc->index == index)
1029 break; /* new format */
1030 index++;
80297125 1031 if (index >= ARRAY_SIZE(fmt_tb))
63eb9546
JFM		 1032 return -EINVAL;
1033 }
1034 }
1035 if (i < 0)
1036 return -EINVAL; /* no more format */
1037
63eb9546
JFM		 1038 fmtdesc->pixelformat = fmt_tb[index];
1039 if (gspca_is_compressed(fmt_tb[index]))
1040 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1041 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1042 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1043 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1044 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1045 fmtdesc->description[4] = '\0';
1046 return 0;
1047}
1048
e078770a 1049static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1050 struct v4l2_format *fmt)
1051{
1052 struct gspca_dev *gspca_dev = priv;
c2446b3e 1053 int mode;
63eb9546 1054
c2446b3e
JFM		 1055 mode = gspca_dev->curr_mode;
1056 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1057 sizeof fmt->fmt.pix);
63eb9546
JFM		 1058 return 0;
1059}
1060
e078770a 1061static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1062 struct v4l2_format *fmt)
1063{
24c530b4 1064 int w, h, mode, mode2;
63eb9546 1065
4aa0d037
JFM		 1066 w = fmt->fmt.pix.width;
1067 h = fmt->fmt.pix.height;
d43fa32f 1068
335b3f88 1069#ifdef GSPCA_DEBUG
63eb9546
JFM		 1070 if (gspca_debug & D_CONF)
1071 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1072#endif
1073 /* search the closest mode for width and height */
1074 mode = wxh_to_mode(gspca_dev, w, h);
1075
1076 /* OK if right palette */
c2446b3e
JFM		 1077 if (gspca_dev->cam.cam_mode[mode].pixelformat
1078 != fmt->fmt.pix.pixelformat) {
63eb9546
JFM		 1079
1080 /* else, search the closest mode with the same pixel format */
1081 mode2 = gspca_get_mode(gspca_dev, mode,
1082 fmt->fmt.pix.pixelformat);
c2446b3e 1083 if (mode2 >= 0)
63eb9546 1084 mode = mode2;
c2446b3e
JFM		 1085/* else
1086 ; * no chance, return this mode */
63eb9546 1087 }
c2446b3e
JFM		 1088 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1089 sizeof fmt->fmt.pix);
63eb9546
JFM		 1090 return mode; /* used when s_fmt */
1091}
1092
e078770a 1093static int vidioc_try_fmt_vid_cap(struct file *file,
63eb9546
JFM		 1094 void *priv,
1095 struct v4l2_format *fmt)
1096{
4aa0d037 1097 struct gspca_dev *gspca_dev = priv;
63eb9546
JFM		 1098 int ret;
1099
e078770a 1100 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1101 if (ret < 0)
1102 return ret;
1103 return 0;
1104}
1105
e078770a 1106static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1107 struct v4l2_format *fmt)
1108{
1109 struct gspca_dev *gspca_dev = priv;
d43fa32f 1110 int ret;
63eb9546 1111
e2997a72
HG		 1112 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1113 return -ERESTARTSYS;
d43fa32f 1114
e078770a 1115 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1116 if (ret < 0)
1117 goto out;
1118
d43fa32f
JFM		 1119 if (gspca_dev->nframes != 0
1120 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1121 ret = -EINVAL;
1122 goto out;
1123 }
1124
50a871fe
JFM		 1125 if (ret == gspca_dev->curr_mode) {
1126 ret = 0;
63eb9546 1127 goto out; /* same mode */
50a871fe 1128 }
d43fa32f
JFM		 1129
1130 if (gspca_dev->streaming) {
1131 ret = -EBUSY;
1132 goto out;
e2997a72 1133 }
4aa0d037
JFM		 1134 gspca_dev->width = fmt->fmt.pix.width;
1135 gspca_dev->height = fmt->fmt.pix.height;
63eb9546
JFM		 1136 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1137 gspca_dev->curr_mode = ret;
d43fa32f 1138
d43fa32f 1139 ret = 0;
63eb9546
JFM		 1140out:
1141 mutex_unlock(&gspca_dev->queue_lock);
1142 return ret;
1143}
1144
11c635a2
HG		 1145static int vidioc_enum_framesizes(struct file *file, void *priv,
1146 struct v4l2_frmsizeenum *fsize)
1147{
1148 struct gspca_dev *gspca_dev = priv;
1149 int i;
1150 __u32 index = 0;
1151
1152 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1153 if (fsize->pixel_format !=
1154 gspca_dev->cam.cam_mode[i].pixelformat)
1155 continue;
1156
1157 if (fsize->index == index) {
1158 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1159 fsize->discrete.width =
1160 gspca_dev->cam.cam_mode[i].width;
1161 fsize->discrete.height =
1162 gspca_dev->cam.cam_mode[i].height;
1163 return 0;
1164 }
1165 index++;
1166 }
1167
1168 return -EINVAL;
1169}
1170
28ffe77f
AO		 1171static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1172 struct v4l2_frmivalenum *fival)
1173{
1174 struct gspca_dev *gspca_dev = priv;
1175 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1176 __u32 i;
1177
1178 if (gspca_dev->cam.mode_framerates == NULL ||
1179 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1180 return -EINVAL;
1181
1182 if (fival->pixel_format !=
1183 gspca_dev->cam.cam_mode[mode].pixelformat)
1184 return -EINVAL;
1185
1186 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1187 if (fival->index == i) {
1188 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1189 fival->discrete.numerator = 1;
1190 fival->discrete.denominator =
1191 gspca_dev->cam.mode_framerates[mode].rates[i];
1192 return 0;
1193 }
1194 }
1195
1196 return -EINVAL;
1197}
1198
d0182306 1199static void gspca_release(struct video_device *vfd)
6b060ffe 1200{
d0182306 1201 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
6b060ffe 1202
38c7c036
LP		 1203 PDEBUG(D_PROBE, "%s released",
1204 video_device_node_name(&gspca_dev->vdev));
6b060ffe
FZ		 1205
1206 kfree(gspca_dev->usb_buf);
1207 kfree(gspca_dev);
1208}
1209
bec43661 1210static int dev_open(struct file *file)
63eb9546
JFM		 1211{
1212 struct gspca_dev *gspca_dev;
1213 int ret;
1214
0d07e240 1215 PDEBUG(D_STREAM, "[%s] open", current->comm);
a12ca6a6 1216 gspca_dev = (struct gspca_dev *) video_devdata(file);
e2997a72
HG		 1217 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1218 return -ERESTARTSYS;
63eb9546
JFM		 1219 if (!gspca_dev->present) {
1220 ret = -ENODEV;
1221 goto out;
1222 }
1223
012d6b02 1224 if (gspca_dev->users > 4) { /* (arbitrary value) */
63eb9546
JFM		 1225 ret = -EBUSY;
1226 goto out;
1227 }
5c4fa002
JFM		 1228
1229 /* protect the subdriver against rmmod */
1230 if (!try_module_get(gspca_dev->module)) {
1231 ret = -ENODEV;
1232 goto out;
1233 }
1234
63eb9546 1235 gspca_dev->users++;
6b060ffe 1236
63eb9546 1237 file->private_data = gspca_dev;
335b3f88 1238#ifdef GSPCA_DEBUG
63eb9546 1239 /* activate the v4l2 debug */
d43fa32f 1240 if (gspca_debug & D_V4L2)
a12ca6a6 1241 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
9de436cf 1242 | V4L2_DEBUG_IOCTL_ARG;
63eb9546 1243 else
a12ca6a6 1244 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
9de436cf 1245 | V4L2_DEBUG_IOCTL_ARG);
63eb9546 1246#endif
012d6b02 1247 ret = 0;
63eb9546
JFM		 1248out:
1249 mutex_unlock(&gspca_dev->queue_lock);
1250 if (ret != 0)
1251 PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
1252 else
d43fa32f 1253 PDEBUG(D_STREAM, "open done");
63eb9546
JFM		 1254 return ret;
1255}
1256
bec43661 1257static int dev_close(struct file *file)
63eb9546
JFM		 1258{
1259 struct gspca_dev *gspca_dev = file->private_data;
1260
0d07e240 1261 PDEBUG(D_STREAM, "[%s] close", current->comm);
e2997a72
HG		 1262 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1263 return -ERESTARTSYS;
1264 gspca_dev->users--;
e2997a72 1265
5b77ae77 1266 /* if the file did the capture, free the streaming resources */
4aa0d037 1267 if (gspca_dev->capt_file == file) {
a1e8288b
JFM		 1268 if (gspca_dev->streaming) {
1269 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1270 gspca_dev->usb_err = 0;
a1e8288b
JFM		 1271 gspca_stream_off(gspca_dev);
1272 mutex_unlock(&gspca_dev->usb_lock);
1273 }
4aa0d037 1274 frame_free(gspca_dev);
efab8211 1275 gspca_dev->capt_file = NULL;
d43fa32f 1276 gspca_dev->memory = GSPCA_MEMORY_NO;
4aa0d037 1277 }
d43fa32f 1278 file->private_data = NULL;
5c4fa002 1279 module_put(gspca_dev->module);
63eb9546 1280 mutex_unlock(&gspca_dev->queue_lock);
6b060ffe 1281
d43fa32f 1282 PDEBUG(D_STREAM, "close done");
6b060ffe 1283
63eb9546
JFM		 1284 return 0;
1285}
1286
1287static int vidioc_querycap(struct file *file, void *priv,
1288 struct v4l2_capability *cap)
1289{
1290 struct gspca_dev *gspca_dev = priv;
090264e5 1291 int ret;
63eb9546 1292
090264e5
JFM		 1293 /* protect the access to the usb device */
1294 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1295 return -ERESTARTSYS;
1296 if (!gspca_dev->present) {
1297 ret = -ENODEV;
1298 goto out;
1299 }
63eb9546 1300 strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
c6edaf16
JFM		 1301 if (gspca_dev->dev->product != NULL) {
1302 strncpy(cap->card, gspca_dev->dev->product,
1303 sizeof cap->card);
1304 } else {
1305 snprintf(cap->card, sizeof cap->card,
1306 "USB Camera (%04x:%04x)",
1307 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1308 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1309 }
5932028f 1310 usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info));
63eb9546
JFM		 1311 cap->version = DRIVER_VERSION_NUMBER;
1312 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
1313 | V4L2_CAP_STREAMING
1314 | V4L2_CAP_READWRITE;
090264e5
JFM		 1315 ret = 0;
1316out:
1317 mutex_unlock(&gspca_dev->usb_lock);
1318 return ret;
63eb9546
JFM		 1319}
1320
6a33091f 1321static int get_ctrl(struct gspca_dev *gspca_dev,
a0001a28
HG		 1322 int id)
1323{
1324 const struct ctrl *ctrls;
1325 int i;
1326
1327 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1328 i < gspca_dev->sd_desc->nctrls;
1329 i++, ctrls++) {
1330 if (gspca_dev->ctrl_dis & (1 << i))
1331 continue;
1332 if (id == ctrls->qctrl.id)
6a33091f 1333 return i;
a0001a28 1334 }
6a33091f 1335 return -1;
a0001a28
HG		 1336}
1337
63eb9546
JFM		 1338static int vidioc_queryctrl(struct file *file, void *priv,
1339 struct v4l2_queryctrl *q_ctrl)
1340{
1341 struct gspca_dev *gspca_dev = priv;
a0001a28 1342 const struct ctrl *ctrls;
6a33091f
JFM		 1343 struct gspca_ctrl *gspca_ctrl;
1344 int i, idx;
6a7eba24
JFM		 1345 u32 id;
1346
1347 id = q_ctrl->id;
1348 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1349 id &= V4L2_CTRL_ID_MASK;
1350 id++;
6a33091f 1351 idx = -1;
6a7eba24 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;
6a33091f
JFM		 1357 if (idx >= 0
1358 && gspca_dev->sd_desc->ctrls[i].qctrl.id
780e3121 1359 > gspca_dev->sd_desc->ctrls[idx].qctrl.id)
b8bfb5fb 1360 continue;
6a33091f 1361 idx = i;
63eb9546 1362 }
a0001a28 1363 } else {
6a33091f 1364 idx = get_ctrl(gspca_dev, id);
63eb9546 1365 }
6a33091f
JFM		 1366 if (idx < 0)
1367 return -EINVAL;
1368 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1369 memcpy(q_ctrl, &ctrls->qctrl, sizeof *q_ctrl);
1370 if (gspca_dev->cam.ctrls != NULL) {
1371 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1372 q_ctrl->default_value = gspca_ctrl->def;
1373 q_ctrl->minimum = gspca_ctrl->min;
1374 q_ctrl->maximum = gspca_ctrl->max;
1375 }
1376 if (gspca_dev->ctrl_inac & (1 << idx))
4af85668 1377 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
f50ba1be 1378 return 0;
63eb9546
JFM		 1379}
1380
1381static int vidioc_s_ctrl(struct file *file, void *priv,
1382 struct v4l2_control *ctrl)
1383{
1384 struct gspca_dev *gspca_dev = priv;
a5ae2062 1385 const struct ctrl *ctrls;
6a33091f
JFM		 1386 struct gspca_ctrl *gspca_ctrl;
1387 int idx, ret;
63eb9546 1388
6a33091f
JFM		 1389 idx = get_ctrl(gspca_dev, ctrl->id);
1390 if (idx < 0)
a0001a28 1391 return -EINVAL;
6a33091f
JFM		 1392 if (gspca_dev->ctrl_inac & (1 << idx))
1393 return -EINVAL;
1394 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1395 if (gspca_dev->cam.ctrls != NULL) {
1396 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1397 if (ctrl->value < gspca_ctrl->min
1398 || ctrl->value > gspca_ctrl->max)
1399 return -ERANGE;
1400 } else {
1401 gspca_ctrl = NULL;
1402 if (ctrl->value < ctrls->qctrl.minimum
1403 || ctrl->value > ctrls->qctrl.maximum)
1404 return -ERANGE;
1405 }
a0001a28
HG		 1406 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1407 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1408 return -ERESTARTSYS;
6a33091f
JFM		 1409 if (!gspca_dev->present) {
1410 ret = -ENODEV;
1411 goto out;
1412 }
8c4ebae4 1413 gspca_dev->usb_err = 0;
6a33091f 1414 if (ctrls->set != NULL) {
a0001a28 1415 ret = ctrls->set(gspca_dev, ctrl->value);
6a33091f
JFM		 1416 goto out;
1417 }
1418 if (gspca_ctrl != NULL) {
1419 gspca_ctrl->val = ctrl->value;
1420 if (ctrls->set_control != NULL
1421 && gspca_dev->streaming)
1422 ctrls->set_control(gspca_dev);
1423 }
1424 ret = gspca_dev->usb_err;
1425out:
a0001a28
HG		 1426 mutex_unlock(&gspca_dev->usb_lock);
1427 return ret;
63eb9546
JFM		 1428}
1429
1430static int vidioc_g_ctrl(struct file *file, void *priv,
1431 struct v4l2_control *ctrl)
1432{
1433 struct gspca_dev *gspca_dev = priv;
a5ae2062 1434 const struct ctrl *ctrls;
6a33091f 1435 int idx, ret;
63eb9546 1436
6a33091f
JFM		 1437 idx = get_ctrl(gspca_dev, ctrl->id);
1438 if (idx < 0)
a0001a28 1439 return -EINVAL;
6a33091f 1440 ctrls = &gspca_dev->sd_desc->ctrls[idx];
a0001a28
HG		 1441
1442 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1443 return -ERESTARTSYS;
6a33091f
JFM		 1444 if (!gspca_dev->present) {
1445 ret = -ENODEV;
1446 goto out;
1447 }
8c4ebae4 1448 gspca_dev->usb_err = 0;
6a33091f 1449 if (ctrls->get != NULL) {
a0001a28 1450 ret = ctrls->get(gspca_dev, &ctrl->value);
6a33091f
JFM		 1451 goto out;
1452 }
1453 if (gspca_dev->cam.ctrls != NULL)
1454 ctrl->value = gspca_dev->cam.ctrls[idx].val;
1455 ret = 0;
1456out:
a0001a28
HG		 1457 mutex_unlock(&gspca_dev->usb_lock);
1458 return ret;
63eb9546
JFM		 1459}
1460
1461static int vidioc_querymenu(struct file *file, void *priv,
1462 struct v4l2_querymenu *qmenu)
1463{
1464 struct gspca_dev *gspca_dev = priv;
1465
1466 if (!gspca_dev->sd_desc->querymenu)
1467 return -EINVAL;
1468 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1469}
1470
1471static int vidioc_enum_input(struct file *file, void *priv,
1472 struct v4l2_input *input)
1473{
1474 struct gspca_dev *gspca_dev = priv;
1475
1476 if (input->index != 0)
1477 return -EINVAL;
63eb9546 1478 input->type = V4L2_INPUT_TYPE_CAMERA;
dfa76fa2 1479 input->status = gspca_dev->cam.input_flags;
63eb9546
JFM		 1480 strncpy(input->name, gspca_dev->sd_desc->name,
1481 sizeof input->name);
1482 return 0;
1483}
1484
1485static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1486{
1487 *i = 0;
1488 return 0;
1489}
1490
1491static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1492{
1493 if (i > 0)
1494 return -EINVAL;
1495 return (0);
1496}
1497
1498static int vidioc_reqbufs(struct file *file, void *priv,
1499 struct v4l2_requestbuffers *rb)
1500{
1501 struct gspca_dev *gspca_dev = priv;
832d0a91 1502 int i, ret = 0, streaming;
63eb9546 1503
a2ba6f27
JFM		 1504 i = rb->memory; /* (avoid compilation warning) */
1505 switch (i) {
5b77ae77 1506 case GSPCA_MEMORY_READ: /* (internal call) */
d43fa32f 1507 case V4L2_MEMORY_MMAP:
d43fa32f 1508 case V4L2_MEMORY_USERPTR:
6a7eba24 1509 break;
d43fa32f 1510 default:
63eb9546 1511 return -EINVAL;
d43fa32f 1512 }
e2997a72
HG		 1513 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1514 return -ERESTARTSYS;
d43fa32f 1515
5b77ae77
JFM		 1516 if (gspca_dev->memory != GSPCA_MEMORY_NO
1517 && gspca_dev->memory != rb->memory) {
4aa0d037
JFM		 1518 ret = -EBUSY;
1519 goto out;
1520 }
d43fa32f 1521
5b77ae77
JFM		 1522 /* only one file may do the capture */
1523 if (gspca_dev->capt_file != NULL
1524 && gspca_dev->capt_file != file) {
1525 ret = -EBUSY;
1526 goto out;
1527 }
1528
1529 /* if allocated, the buffers must not be mapped */
1530 for (i = 0; i < gspca_dev->nframes; i++) {
1531 if (gspca_dev->frame[i].vma_use_count) {
ac0d6df6
JFM		 1532 ret = -EBUSY;
1533 goto out;
1534 }
5b77ae77
JFM		 1535 }
1536
1537 /* stop streaming */
832d0a91
JFM		 1538 streaming = gspca_dev->streaming;
1539 if (streaming) {
5b77ae77 1540 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1541 gspca_dev->usb_err = 0;
5b77ae77
JFM		 1542 gspca_stream_off(gspca_dev);
1543 mutex_unlock(&gspca_dev->usb_lock);
1544 }
1545
1546 /* free the previous allocated buffers, if any */
1547 if (gspca_dev->nframes != 0) {
1548 frame_free(gspca_dev);
1549 gspca_dev->capt_file = NULL;
1550 }
1551 if (rb->count == 0) /* unrequest */
1552 goto out;
1553 gspca_dev->memory = rb->memory;
1554 ret = frame_alloc(gspca_dev, rb->count);
1555 if (ret == 0) {
1556 rb->count = gspca_dev->nframes;
1557 gspca_dev->capt_file = file;
832d0a91
JFM		 1558 if (streaming)
1559 ret = gspca_init_transfer(gspca_dev);
4aa0d037
JFM		 1560 }
1561out:
63eb9546
JFM		 1562 mutex_unlock(&gspca_dev->queue_lock);
1563 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1564 return ret;
1565}
1566
1567static int vidioc_querybuf(struct file *file, void *priv,
1568 struct v4l2_buffer *v4l2_buf)
1569{
1570 struct gspca_dev *gspca_dev = priv;
1571 struct gspca_frame *frame;
1572
13752bd9 1573 if (v4l2_buf->index < 0
63eb9546
JFM		 1574 || v4l2_buf->index >= gspca_dev->nframes)
1575 return -EINVAL;
1576
1577 frame = &gspca_dev->frame[v4l2_buf->index];
1578 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1579 return 0;
1580}
1581
1582static int vidioc_streamon(struct file *file, void *priv,
1583 enum v4l2_buf_type buf_type)
1584{
1585 struct gspca_dev *gspca_dev = priv;
1586 int ret;
1587
63eb9546
JFM		 1588 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1589 return -EINVAL;
e2997a72
HG		 1590 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1591 return -ERESTARTSYS;
090264e5 1592
18bf99aa
JFM		 1593 /* check the capture file */
1594 if (gspca_dev->capt_file != file) {
1595 ret = -EBUSY;
1596 goto out;
1597 }
1598
1edabe71
JFM		 1599 if (gspca_dev->nframes == 0
1600 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
63eb9546
JFM		 1601 ret = -EINVAL;
1602 goto out;
1603 }
1604 if (!gspca_dev->streaming) {
1605 ret = gspca_init_transfer(gspca_dev);
1606 if (ret < 0)
1607 goto out;
1608 }
335b3f88 1609#ifdef GSPCA_DEBUG
63eb9546
JFM		 1610 if (gspca_debug & D_STREAM) {
1611 PDEBUG_MODE("stream on OK",
1612 gspca_dev->pixfmt,
1613 gspca_dev->width,
1614 gspca_dev->height);
1615 }
1616#endif
e2997a72 1617 ret = 0;
63eb9546
JFM		 1618out:
1619 mutex_unlock(&gspca_dev->queue_lock);
1620 return ret;
1621}
1622
1623static int vidioc_streamoff(struct file *file, void *priv,
1624 enum v4l2_buf_type buf_type)
1625{
1626 struct gspca_dev *gspca_dev = priv;
f7059eaa 1627 int ret;
63eb9546 1628
63eb9546
JFM		 1629 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1630 return -EINVAL;
4aa0d037
JFM		 1631 if (!gspca_dev->streaming)
1632 return 0;
1633 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1634 return -ERESTARTSYS;
5b77ae77 1635
18bf99aa
JFM		 1636 /* check the capture file */
1637 if (gspca_dev->capt_file != file) {
1638 ret = -EBUSY;
1639 goto out;
1640 }
1641
5b77ae77 1642 /* stop streaming */
4aa0d037
JFM		 1643 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1644 ret = -ERESTARTSYS;
1645 goto out;
63eb9546 1646 }
8c4ebae4 1647 gspca_dev->usb_err = 0;
4aa0d037 1648 gspca_stream_off(gspca_dev);
4aa0d037 1649 mutex_unlock(&gspca_dev->usb_lock);
5b77ae77 1650
f7059eaa
JFM		 1651 /* empty the transfer queues */
1652 atomic_set(&gspca_dev->fr_q, 0);
1653 atomic_set(&gspca_dev->fr_i, 0);
1654 gspca_dev->fr_o = 0;
5b77ae77 1655 ret = 0;
4aa0d037
JFM		 1656out:
1657 mutex_unlock(&gspca_dev->queue_lock);
1658 return ret;
63eb9546
JFM		 1659}
1660
1661static int vidioc_g_jpegcomp(struct file *file, void *priv,
1662 struct v4l2_jpegcompression *jpegcomp)
1663{
1664 struct gspca_dev *gspca_dev = priv;
1665 int ret;
1666
1667 if (!gspca_dev->sd_desc->get_jcomp)
1668 return -EINVAL;
e2997a72
HG		 1669 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1670 return -ERESTARTSYS;
8c4ebae4 1671 gspca_dev->usb_err = 0;
090264e5
JFM		 1672 if (gspca_dev->present)
1673 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1674 else
1675 ret = -ENODEV;
63eb9546
JFM		 1676 mutex_unlock(&gspca_dev->usb_lock);
1677 return ret;
1678}
1679
1680static int vidioc_s_jpegcomp(struct file *file, void *priv,
1681 struct v4l2_jpegcompression *jpegcomp)
1682{
1683 struct gspca_dev *gspca_dev = priv;
1684 int ret;
1685
63eb9546
JFM		 1686 if (!gspca_dev->sd_desc->set_jcomp)
1687 return -EINVAL;
f86d4a91
JP		 1688 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1689 return -ERESTARTSYS;
8c4ebae4 1690 gspca_dev->usb_err = 0;
090264e5
JFM		 1691 if (gspca_dev->present)
1692 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1693 else
1694 ret = -ENODEV;
63eb9546
JFM		 1695 mutex_unlock(&gspca_dev->usb_lock);
1696 return ret;
1697}
1698
1699static int vidioc_g_parm(struct file *filp, void *priv,
1700 struct v4l2_streamparm *parm)
1701{
1702 struct gspca_dev *gspca_dev = priv;
1703
63eb9546 1704 parm->parm.capture.readbuffers = gspca_dev->nbufread;
627a5ef7
JP		 1705
1706 if (gspca_dev->sd_desc->get_streamparm) {
1707 int ret;
1708
1709 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1710 return -ERESTARTSYS;
8c4ebae4 1711 gspca_dev->usb_err = 0;
090264e5
JFM		 1712 if (gspca_dev->present)
1713 ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
1714 parm);
1715 else
1716 ret = -ENODEV;
627a5ef7
JP		 1717 mutex_unlock(&gspca_dev->usb_lock);
1718 return ret;
1719 }
1720
63eb9546
JFM		 1721 return 0;
1722}
1723
1724static int vidioc_s_parm(struct file *filp, void *priv,
1725 struct v4l2_streamparm *parm)
1726{
1727 struct gspca_dev *gspca_dev = priv;
1728 int n;
1729
63eb9546 1730 n = parm->parm.capture.readbuffers;
f7059eaa 1731 if (n == 0 || n >= GSPCA_MAX_FRAMES)
63eb9546
JFM		 1732 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1733 else
1734 gspca_dev->nbufread = n;
627a5ef7
JP		 1735
1736 if (gspca_dev->sd_desc->set_streamparm) {
1737 int ret;
1738
1739 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1740 return -ERESTARTSYS;
8c4ebae4 1741 gspca_dev->usb_err = 0;
090264e5
JFM		 1742 if (gspca_dev->present)
1743 ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
1744 parm);
1745 else
1746 ret = -ENODEV;
627a5ef7
JP		 1747 mutex_unlock(&gspca_dev->usb_lock);
1748 return ret;
1749 }
1750
63eb9546
JFM		 1751 return 0;
1752}
1753
63eb9546
JFM		 1754static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1755{
1756 struct gspca_dev *gspca_dev = file->private_data;
efab8211 1757 struct gspca_frame *frame;
63eb9546
JFM		 1758 struct page *page;
1759 unsigned long addr, start, size;
1760 int i, ret;
63eb9546
JFM		 1761
1762 start = vma->vm_start;
1763 size = vma->vm_end - vma->vm_start;
1764 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1765
e2997a72
HG		 1766 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1767 return -ERESTARTSYS;
63eb9546
JFM		 1768 if (!gspca_dev->present) {
1769 ret = -ENODEV;
4aa0d037
JFM		 1770 goto out;
1771 }
1772 if (gspca_dev->capt_file != file) {
1773 ret = -EINVAL;
1774 goto out;
63eb9546
JFM		 1775 }
1776
efab8211 1777 frame = NULL;
63eb9546
JFM		 1778 for (i = 0; i < gspca_dev->nframes; ++i) {
1779 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1780 PDEBUG(D_STREAM, "mmap bad memory type");
1781 break;
1782 }
1783 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1784 == vma->vm_pgoff) {
1785 frame = &gspca_dev->frame[i];
1786 break;
1787 }
1788 }
efab8211 1789 if (frame == NULL) {
63eb9546
JFM		 1790 PDEBUG(D_STREAM, "mmap no frame buffer found");
1791 ret = -EINVAL;
4aa0d037 1792 goto out;
63eb9546 1793 }
38bff697 1794 if (size != frame->v4l2_buf.length) {
63eb9546
JFM		 1795 PDEBUG(D_STREAM, "mmap bad size");
1796 ret = -EINVAL;
4aa0d037 1797 goto out;
63eb9546
JFM		 1798 }
1799
1800 /*
1801 * - VM_IO marks the area as being a mmaped region for I/O to a
1802 * device. It also prevents the region from being core dumped.
1803 */
1804 vma->vm_flags |= VM_IO;
1805
1806 addr = (unsigned long) frame->data;
1807 while (size > 0) {
1808 page = vmalloc_to_page((void *) addr);
1809 ret = vm_insert_page(vma, start, page);
1810 if (ret < 0)
4aa0d037 1811 goto out;
63eb9546
JFM		 1812 start += PAGE_SIZE;
1813 addr += PAGE_SIZE;
1814 size -= PAGE_SIZE;
1815 }
1816
d50e257e 1817 vma->vm_ops = &gspca_vm_ops;
63eb9546
JFM		 1818 vma->vm_private_data = frame;
1819 gspca_vm_open(vma);
e2997a72 1820 ret = 0;
4aa0d037 1821out:
63eb9546
JFM		 1822 mutex_unlock(&gspca_dev->queue_lock);
1823 return ret;
1824}
1825
63eb9546
JFM		 1826/*
1827 * wait for a video frame
1828 *
1829 * If a frame is ready, its index is returned.
1830 */
d43fa32f 1831static int frame_wait(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1832 int nonblock_ing)
1833{
f7059eaa 1834 int i, ret;
63eb9546 1835
d43fa32f 1836 /* check if a frame is ready */
63eb9546 1837 i = gspca_dev->fr_o;
f7059eaa 1838 if (i == atomic_read(&gspca_dev->fr_i)) {
181b704f
HG		 1839 if (nonblock_ing)
1840 return -EAGAIN;
1841
1842 /* wait till a frame is ready */
4aa0d037 1843 ret = wait_event_interruptible_timeout(gspca_dev->wq,
f7059eaa 1844 i != atomic_read(&gspca_dev->fr_i) ||
181b704f
HG		 1845 !gspca_dev->streaming || !gspca_dev->present,
1846 msecs_to_jiffies(3000));
1847 if (ret < 0)
1848 return ret;
1849 if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present)
e2997a72 1850 return -EIO;
63eb9546 1851 }
181b704f 1852
f7059eaa 1853 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
e2997a72 1854
739570bb
JFM		 1855 if (gspca_dev->sd_desc->dq_callback) {
1856 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1857 gspca_dev->usb_err = 0;
090264e5
JFM		 1858 if (gspca_dev->present)
1859 gspca_dev->sd_desc->dq_callback(gspca_dev);
739570bb
JFM		 1860 mutex_unlock(&gspca_dev->usb_lock);
1861 }
f7059eaa 1862 return gspca_dev->fr_queue[i];
63eb9546
JFM		 1863}
1864
1865/*
1866 * dequeue a video buffer
1867 *
1868 * If nonblock_ing is false, block until a buffer is available.
1869 */
1870static int vidioc_dqbuf(struct file *file, void *priv,
1871 struct v4l2_buffer *v4l2_buf)
1872{
1873 struct gspca_dev *gspca_dev = priv;
1874 struct gspca_frame *frame;
1875 int i, ret;
1876
1877 PDEBUG(D_FRAM, "dqbuf");
ac0d6df6 1878 if (v4l2_buf->memory != gspca_dev->memory)
63eb9546 1879 return -EINVAL;
5b77ae77 1880
090264e5
JFM		 1881 if (!gspca_dev->present)
1882 return -ENODEV;
1883
5b77ae77
JFM		 1884 /* if not streaming, be sure the application will not loop forever */
1885 if (!(file->f_flags & O_NONBLOCK)
1886 && !gspca_dev->streaming && gspca_dev->users == 1)
63eb9546
JFM		 1887 return -EINVAL;
1888
5b77ae77
JFM		 1889 /* only the capturing file may dequeue */
1890 if (gspca_dev->capt_file != file)
1891 return -EINVAL;
1892
1893 /* only one dequeue / read at a time */
63eb9546
JFM		 1894 if (mutex_lock_interruptible(&gspca_dev->read_lock))
1895 return -ERESTARTSYS;
1896
d43fa32f 1897 ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
63eb9546 1898 if (ret < 0)
4aa0d037 1899 goto out;
63eb9546
JFM		 1900 i = ret; /* frame index */
1901 frame = &gspca_dev->frame[i];
ac0d6df6 1902 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
c6eb8eaf 1903 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
ac0d6df6
JFM		 1904 frame->data,
1905 frame->v4l2_buf.bytesused)) {
1906 PDEBUG(D_ERR|D_STREAM,
1907 "dqbuf cp to user failed");
1908 ret = -EFAULT;
1909 goto out;
1910 }
1911 }
63eb9546
JFM		 1912 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1913 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1914 PDEBUG(D_FRAM, "dqbuf %d", i);
1915 ret = 0;
4aa0d037 1916out:
63eb9546
JFM		 1917 mutex_unlock(&gspca_dev->read_lock);
1918 return ret;
1919}
1920
1921/*
1922 * queue a video buffer
1923 *
1924 * Attempting to queue a buffer that has already been
1925 * queued will return -EINVAL.
1926 */
1927static int vidioc_qbuf(struct file *file, void *priv,
1928 struct v4l2_buffer *v4l2_buf)
1929{
1930 struct gspca_dev *gspca_dev = priv;
1931 struct gspca_frame *frame;
1932 int i, index, ret;
1933
1934 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
63eb9546 1935
5b77ae77
JFM		 1936 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1937 return -ERESTARTSYS;
1938
63eb9546
JFM		 1939 index = v4l2_buf->index;
1940 if ((unsigned) index >= gspca_dev->nframes) {
d43fa32f 1941 PDEBUG(D_FRAM,
63eb9546 1942 "qbuf idx %d >= %d", index, gspca_dev->nframes);
5b77ae77
JFM		 1943 ret = -EINVAL;
1944 goto out;
63eb9546 1945 }
5b77ae77 1946 if (v4l2_buf->memory != gspca_dev->memory) {
d43fa32f 1947 PDEBUG(D_FRAM, "qbuf bad memory type");
5b77ae77
JFM		 1948 ret = -EINVAL;
1949 goto out;
63eb9546 1950 }
e2997a72 1951
5b77ae77 1952 frame = &gspca_dev->frame[index];
d43fa32f
JFM		 1953 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1954 PDEBUG(D_FRAM, "qbuf bad state");
63eb9546
JFM		 1955 ret = -EINVAL;
1956 goto out;
1957 }
1958
1959 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
63eb9546 1960
d43fa32f 1961 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
63eb9546
JFM		 1962 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
1963 frame->v4l2_buf.length = v4l2_buf->length;
1964 }
1965
1966 /* put the buffer in the 'queued' queue */
f7059eaa 1967 i = atomic_read(&gspca_dev->fr_q);
63eb9546 1968 gspca_dev->fr_queue[i] = index;
f7059eaa 1969 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
63eb9546
JFM		 1970
1971 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
1972 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
1973 ret = 0;
1974out:
1975 mutex_unlock(&gspca_dev->queue_lock);
1976 return ret;
1977}
1978
d43fa32f
JFM		 1979/*
1980 * allocate the resources for read()
1981 */
1982static int read_alloc(struct gspca_dev *gspca_dev,
1983 struct file *file)
63eb9546 1984{
63eb9546 1985 struct v4l2_buffer v4l2_buf;
d43fa32f 1986 int i, ret;
63eb9546 1987
d43fa32f 1988 PDEBUG(D_STREAM, "read alloc");
63eb9546
JFM		 1989 if (gspca_dev->nframes == 0) {
1990 struct v4l2_requestbuffers rb;
1991
1992 memset(&rb, 0, sizeof rb);
1993 rb.count = gspca_dev->nbufread;
1994 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 1995 rb.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 1996 ret = vidioc_reqbufs(file, gspca_dev, &rb);
1997 if (ret != 0) {
d43fa32f 1998 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
63eb9546
JFM		 1999 return ret;
2000 }
2001 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2002 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2003 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2004 for (i = 0; i < gspca_dev->nbufread; i++) {
2005 v4l2_buf.index = i;
63eb9546
JFM		 2006 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2007 if (ret != 0) {
2008 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
2009 return ret;
2010 }
2011 }
d43fa32f
JFM		 2012 gspca_dev->memory = GSPCA_MEMORY_READ;
2013 }
4aa0d037 2014
d43fa32f
JFM		 2015 /* start streaming */
2016 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
2017 if (ret != 0)
2018 PDEBUG(D_STREAM, "read streamon err %d", ret);
2019 return ret;
2020}
2021
2022static unsigned int dev_poll(struct file *file, poll_table *wait)
2023{
2024 struct gspca_dev *gspca_dev = file->private_data;
f7059eaa 2025 int ret;
d43fa32f
JFM		 2026
2027 PDEBUG(D_FRAM, "poll");
2028
2029 poll_wait(file, &gspca_dev->wq, wait);
d43fa32f 2030
5b77ae77
JFM		 2031 /* if reqbufs is not done, the user would use read() */
2032 if (gspca_dev->nframes == 0) {
2033 if (gspca_dev->memory != GSPCA_MEMORY_NO)
2034 return POLLERR; /* not the 1st time */
d43fa32f 2035 ret = read_alloc(gspca_dev, file);
5b77ae77
JFM		 2036 if (ret != 0)
2037 return POLLERR;
63eb9546
JFM		 2038 }
2039
d43fa32f
JFM		 2040 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
2041 return POLLERR;
d43fa32f 2042
f7059eaa
JFM		 2043 /* check if an image has been received */
2044 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
2045 ret = POLLIN | POLLRDNORM; /* yes */
d43fa32f
JFM		 2046 else
2047 ret = 0;
d43fa32f 2048 mutex_unlock(&gspca_dev->queue_lock);
090264e5
JFM		 2049 if (!gspca_dev->present)
2050 return POLLHUP;
d43fa32f
JFM		 2051 return ret;
2052}
2053
2054static ssize_t dev_read(struct file *file, char __user *data,
2055 size_t count, loff_t *ppos)
2056{
2057 struct gspca_dev *gspca_dev = file->private_data;
2058 struct gspca_frame *frame;
2059 struct v4l2_buffer v4l2_buf;
2060 struct timeval timestamp;
82643d0e 2061 int n, ret, ret2;
d43fa32f 2062
a9e11134 2063 PDEBUG(D_FRAM, "read (%zd)", count);
d43fa32f
JFM		 2064 if (!gspca_dev->present)
2065 return -ENODEV;
2066 switch (gspca_dev->memory) {
2067 case GSPCA_MEMORY_NO: /* first time */
2068 ret = read_alloc(gspca_dev, file);
2069 if (ret != 0)
2070 return ret;
2071 break;
2072 case GSPCA_MEMORY_READ:
82643d0e
JFM		 2073 if (gspca_dev->capt_file == file)
2074 break;
2075 /* fall thru */
d43fa32f
JFM		 2076 default:
2077 return -EINVAL;
2078 }
2079
63eb9546 2080 /* get a frame */
2f51d00f 2081 timestamp = ktime_to_timeval(ktime_get());
63eb9546 2082 timestamp.tv_sec--;
82643d0e
JFM		 2083 n = 2;
2084 for (;;) {
63eb9546
JFM		 2085 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2086 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2087 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2088 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2089 if (ret != 0) {
2090 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2091 return ret;
2092 }
2093
2094 /* if the process slept for more than 1 second,
219423c1 2095 * get a newer frame */
63eb9546 2096 frame = &gspca_dev->frame[v4l2_buf.index];
82643d0e
JFM		 2097 if (--n < 0)
2098 break; /* avoid infinite loop */
63eb9546
JFM		 2099 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2100 break;
2101 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2102 if (ret != 0) {
2103 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2104 return ret;
2105 }
2106 }
2107
2108 /* copy the frame */
ac0d6df6
JFM		 2109 if (count > frame->v4l2_buf.bytesused)
2110 count = frame->v4l2_buf.bytesused;
63eb9546
JFM		 2111 ret = copy_to_user(data, frame->data, count);
2112 if (ret != 0) {
2113 PDEBUG(D_ERR|D_STREAM,
a9e11134 2114 "read cp to user lack %d / %zd", ret, count);
63eb9546
JFM		 2115 ret = -EFAULT;
2116 goto out;
2117 }
2118 ret = count;
2119out:
2120 /* in each case, requeue the buffer */
2121 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2122 if (ret2 != 0)
2123 return ret2;
2124 return ret;
2125}
2126
bec43661 2127static struct v4l2_file_operations dev_fops = {
63eb9546
JFM		 2128 .owner = THIS_MODULE,
2129 .open = dev_open,
2130 .release = dev_close,
2131 .read = dev_read,
2132 .mmap = dev_mmap,
bec43661 2133 .unlocked_ioctl = video_ioctl2,
63eb9546
JFM		 2134 .poll = dev_poll,
2135};
2136
a399810c 2137static const struct v4l2_ioctl_ops dev_ioctl_ops = {
63eb9546
JFM		 2138 .vidioc_querycap = vidioc_querycap,
2139 .vidioc_dqbuf = vidioc_dqbuf,
2140 .vidioc_qbuf = vidioc_qbuf,
e078770a
MCC		 2141 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2142 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2143 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2144 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
63eb9546
JFM		 2145 .vidioc_streamon = vidioc_streamon,
2146 .vidioc_queryctrl = vidioc_queryctrl,
2147 .vidioc_g_ctrl = vidioc_g_ctrl,
2148 .vidioc_s_ctrl = vidioc_s_ctrl,
2149 .vidioc_querymenu = vidioc_querymenu,
2150 .vidioc_enum_input = vidioc_enum_input,
2151 .vidioc_g_input = vidioc_g_input,
2152 .vidioc_s_input = vidioc_s_input,
2153 .vidioc_reqbufs = vidioc_reqbufs,
2154 .vidioc_querybuf = vidioc_querybuf,
2155 .vidioc_streamoff = vidioc_streamoff,
2156 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2157 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2158 .vidioc_g_parm = vidioc_g_parm,
2159 .vidioc_s_parm = vidioc_s_parm,
11c635a2 2160 .vidioc_enum_framesizes = vidioc_enum_framesizes,
28ffe77f 2161 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
af1d9afa
BJ		 2162#ifdef CONFIG_VIDEO_ADV_DEBUG
2163 .vidioc_g_register = vidioc_g_register,
2164 .vidioc_s_register = vidioc_s_register,
2165#endif
2166 .vidioc_g_chip_ident = vidioc_g_chip_ident,
63eb9546
JFM		 2167};
2168
a399810c
HV		 2169static struct video_device gspca_template = {
2170 .name = "gspca main driver",
a399810c
HV		 2171 .fops = &dev_fops,
2172 .ioctl_ops = &dev_ioctl_ops,
d0182306 2173 .release = gspca_release,
a399810c
HV		 2174};
2175
6a33091f
JFM		 2176/* initialize the controls */
2177static void ctrls_init(struct gspca_dev *gspca_dev)
2178{
2179 struct gspca_ctrl *ctrl;
2180 int i;
2181
2182 for (i = 0, ctrl = gspca_dev->cam.ctrls;
2183 i < gspca_dev->sd_desc->nctrls;
2184 i++, ctrl++) {
2185 ctrl->def = gspca_dev->sd_desc->ctrls[i].qctrl.default_value;
2186 ctrl->val = ctrl->def;
2187 ctrl->min = gspca_dev->sd_desc->ctrls[i].qctrl.minimum;
2188 ctrl->max = gspca_dev->sd_desc->ctrls[i].qctrl.maximum;
2189 }
2190}
2191
63eb9546
JFM		 2192/*
2193 * probe and create a new gspca device
2194 *
2195 * This function must be called by the sub-driver when it is
2196 * called for probing a new device.
2197 */
4462864d 2198int gspca_dev_probe2(struct usb_interface *intf,
63eb9546
JFM		 2199 const struct usb_device_id *id,
2200 const struct sd_desc *sd_desc,
d43fa32f
JFM		 2201 int dev_size,
2202 struct module *module)
63eb9546 2203{
63eb9546
JFM		 2204 struct gspca_dev *gspca_dev;
2205 struct usb_device *dev = interface_to_usbdev(intf);
2206 int ret;
63eb9546 2207
6a7eba24 2208 PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
63eb9546 2209
63eb9546
JFM		 2210 /* create the device */
2211 if (dev_size < sizeof *gspca_dev)
2212 dev_size = sizeof *gspca_dev;
2213 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
e293e599 2214 if (!gspca_dev) {
63eb9546 2215 err("couldn't kzalloc gspca struct");
e293e599 2216 return -ENOMEM;
63eb9546 2217 }
8295d99e
JFM		 2218 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2219 if (!gspca_dev->usb_buf) {
2220 err("out of memory");
e293e599 2221 ret = -ENOMEM;
8295d99e
JFM		 2222 goto out;
2223 }
63eb9546 2224 gspca_dev->dev = dev;
4462864d 2225 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
d43fa32f 2226 gspca_dev->nbalt = intf->num_altsetting;
35680baa
JFM		 2227
2228 /* check if any audio device */
2229 if (dev->config->desc.bNumInterfaces != 1) {
2230 int i;
2231 struct usb_interface *intf2;
2232
2233 for (i = 0; i < dev->config->desc.bNumInterfaces; i++) {
2234 intf2 = dev->config->interface[i];
2235 if (intf2 != NULL
2236 && intf2->altsetting != NULL
2237 && intf2->altsetting->desc.bInterfaceClass ==
2238 USB_CLASS_AUDIO) {
2239 gspca_dev->audio = 1;
2240 break;
2241 }
2242 }
2243 }
2244
63eb9546 2245 gspca_dev->sd_desc = sd_desc;
63eb9546 2246 gspca_dev->nbufread = 2;
ff374747 2247 gspca_dev->empty_packet = -1; /* don't check the empty packets */
63eb9546 2248
012d6b02 2249 /* configure the subdriver and initialize the USB device */
ba38ee8e 2250 ret = sd_desc->config(gspca_dev, id);
012d6b02
JFM		 2251 if (ret < 0)
2252 goto out;
6a33091f
JFM		 2253 if (gspca_dev->cam.ctrls != NULL)
2254 ctrls_init(gspca_dev);
ba38ee8e 2255 ret = sd_desc->init(gspca_dev);
63eb9546
JFM		 2256 if (ret < 0)
2257 goto out;
2258 gspca_set_default_mode(gspca_dev);
2259
10ee2402
HG		 2260 ret = gspca_input_connect(gspca_dev);
2261 if (ret)
2262 goto out;
2263
63eb9546
JFM		 2264 mutex_init(&gspca_dev->usb_lock);
2265 mutex_init(&gspca_dev->read_lock);
2266 mutex_init(&gspca_dev->queue_lock);
2267 init_waitqueue_head(&gspca_dev->wq);
2268
2269 /* init video stuff */
ba38ee8e 2270 memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
24441631 2271 gspca_dev->vdev.parent = &intf->dev;
5c4fa002 2272 gspca_dev->module = module;
ee56a4d3 2273 gspca_dev->present = 1;
a12ca6a6 2274 ret = video_register_device(&gspca_dev->vdev,
63eb9546 2275 VFL_TYPE_GRABBER,
8d584a53 2276 -1);
63eb9546
JFM		 2277 if (ret < 0) {
2278 err("video_register_device err %d", ret);
2279 goto out;
2280 }
2281
63eb9546 2282 usb_set_intfdata(intf, gspca_dev);
38c7c036 2283 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
0274d42e 2284
10ee2402 2285 gspca_input_create_urb(gspca_dev);
0274d42e 2286
63eb9546
JFM		 2287 return 0;
2288out:
f7628015 2289#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
10ee2402
HG		 2290 if (gspca_dev->input_dev)
2291 input_unregister_device(gspca_dev->input_dev);
e7637521 2292#endif
e07a1d8a
JFM		 2293 kfree(gspca_dev->usb_buf);
2294 kfree(gspca_dev);
63eb9546
JFM		 2295 return ret;
2296}
4462864d
JFM		 2297EXPORT_SYMBOL(gspca_dev_probe2);
2298
2299/* same function as the previous one, but check the interface */
2300int gspca_dev_probe(struct usb_interface *intf,
2301 const struct usb_device_id *id,
2302 const struct sd_desc *sd_desc,
2303 int dev_size,
2304 struct module *module)
2305{
2306 struct usb_device *dev = interface_to_usbdev(intf);
2307
2308 /* we don't handle multi-config cameras */
2309 if (dev->descriptor.bNumConfigurations != 1) {
0b656321 2310 err("%04x:%04x too many config",
4462864d
JFM		 2311 id->idVendor, id->idProduct);
2312 return -ENODEV;
2313 }
2314
2315 /* the USB video interface must be the first one */
2316 if (dev->config->desc.bNumInterfaces != 1
c4dc692c 2317 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
4462864d 2318 return -ENODEV;
4462864d
JFM		 2319
2320 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
2321}
63eb9546
JFM		 2322EXPORT_SYMBOL(gspca_dev_probe);
2323
2324/*
2325 * USB disconnection
2326 *
2327 * This function must be called by the sub-driver
2328 * when the device disconnects, after the specific resources are freed.
2329 */
2330void gspca_disconnect(struct usb_interface *intf)
2331{
4aa0d037 2332 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
f7628015 2333#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e 2334 struct input_dev *input_dev;
e070bf9e 2335#endif
63eb9546 2336
38c7c036
LP		 2337 PDEBUG(D_PROBE, "%s disconnect",
2338 video_device_node_name(&gspca_dev->vdev));
ad28127d 2339 mutex_lock(&gspca_dev->usb_lock);
6e4ae872 2340 gspca_dev->present = 0;
6e4ae872 2341
090264e5
JFM		 2342 if (gspca_dev->streaming) {
2343 destroy_urbs(gspca_dev);
2344 wake_up_interruptible(&gspca_dev->wq);
2345 }
2346
f7628015 2347#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 2348 gspca_input_destroy_urb(gspca_dev);
2349 input_dev = gspca_dev->input_dev;
2350 if (input_dev) {
2351 gspca_dev->input_dev = NULL;
2352 input_unregister_device(input_dev);
2353 }
e070bf9e 2354#endif
0274d42e 2355
090264e5 2356 /* the device is freed at exit of this function */
ad28127d 2357 gspca_dev->dev = NULL;
090264e5
JFM		 2358 mutex_unlock(&gspca_dev->usb_lock);
2359
6b060ffe
FZ		 2360 usb_set_intfdata(intf, NULL);
2361
a12ca6a6
JFM		 2362 /* release the device */
2363 /* (this will call gspca_release() immediatly or on last close) */
2364 video_unregister_device(&gspca_dev->vdev);
3145b8c1 2365
0d07e240 2366/* PDEBUG(D_PROBE, "disconnect complete"); */
63eb9546
JFM		 2367}
2368EXPORT_SYMBOL(gspca_disconnect);
2369
6a709749
JFM		 2370#ifdef CONFIG_PM
2371int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2372{
2373 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2374
2375 if (!gspca_dev->streaming)
2376 return 0;
2377 gspca_dev->frozen = 1; /* avoid urb error messages */
012d6b02
JFM		 2378 if (gspca_dev->sd_desc->stopN)
2379 gspca_dev->sd_desc->stopN(gspca_dev);
6a709749 2380 destroy_urbs(gspca_dev);
0274d42e 2381 gspca_input_destroy_urb(gspca_dev);
6a709749 2382 gspca_set_alt0(gspca_dev);
012d6b02
JFM		 2383 if (gspca_dev->sd_desc->stop0)
2384 gspca_dev->sd_desc->stop0(gspca_dev);
6a709749
JFM		 2385 return 0;
2386}
2387EXPORT_SYMBOL(gspca_suspend);
2388
2389int gspca_resume(struct usb_interface *intf)
2390{
2391 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2392
2393 gspca_dev->frozen = 0;
012d6b02 2394 gspca_dev->sd_desc->init(gspca_dev);
0274d42e 2395 gspca_input_create_urb(gspca_dev);
012d6b02
JFM		 2396 if (gspca_dev->streaming)
2397 return gspca_init_transfer(gspca_dev);
1e89e2da 2398 return 0;
6a709749
JFM		 2399}
2400EXPORT_SYMBOL(gspca_resume);
2401#endif
dcef3237
HG		 2402/* -- cam driver utility functions -- */
2403
2404/* auto gain and exposure algorithm based on the knee algorithm described here:
2405 http://ytse.tricolour.net/docs/LowLightOptimization.html
2406
2407 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2408 where changed. */
2409int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2410 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2411{
2412 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2413 const struct ctrl *gain_ctrl = NULL;
2414 const struct ctrl *exposure_ctrl = NULL;
2415 const struct ctrl *autogain_ctrl = NULL;
2416 int retval = 0;
2417
2418 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
26984b09
HG		 2419 if (gspca_dev->ctrl_dis & (1 << i))
2420 continue;
dcef3237
HG		 2421 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2422 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2423 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2424 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2425 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2426 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2427 }
2428 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2429 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2430 "on cam without (auto)gain/exposure");
2431 return 0;
2432 }
2433
2434 if (gain_ctrl->get(gspca_dev, &gain) ||
2435 exposure_ctrl->get(gspca_dev, &exposure) ||
2436 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2437 return 0;
2438
2439 orig_gain = gain;
2440 orig_exposure = exposure;
2441
2442 /* If we are of a multiple of deadzone, do multiple steps to reach the
2443 desired lumination fast (with the risc of a slight overshoot) */
2444 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2445
1c44d81d 2446 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
dcef3237
HG		 2447 avg_lum, desired_avg_lum, steps);
2448
2449 for (i = 0; i < steps; i++) {
2450 if (avg_lum > desired_avg_lum) {
2451 if (gain > gain_knee)
2452 gain--;
2453 else if (exposure > exposure_knee)
2454 exposure--;
2455 else if (gain > gain_ctrl->qctrl.default_value)
2456 gain--;
2457 else if (exposure > exposure_ctrl->qctrl.minimum)
2458 exposure--;
2459 else if (gain > gain_ctrl->qctrl.minimum)
2460 gain--;
2461 else
2462 break;
2463 } else {
2464 if (gain < gain_ctrl->qctrl.default_value)
2465 gain++;
2466 else if (exposure < exposure_knee)
2467 exposure++;
2468 else if (gain < gain_knee)
2469 gain++;
2470 else if (exposure < exposure_ctrl->qctrl.maximum)
2471 exposure++;
2472 else if (gain < gain_ctrl->qctrl.maximum)
2473 gain++;
2474 else
2475 break;
2476 }
2477 }
2478
2479 if (gain != orig_gain) {
2480 gain_ctrl->set(gspca_dev, gain);
2481 retval = 1;
2482 }
2483 if (exposure != orig_exposure) {
2484 exposure_ctrl->set(gspca_dev, exposure);
2485 retval = 1;
2486 }
2487
2488 return retval;
2489}
2490EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2491
63eb9546
JFM		 2492/* -- module insert / remove -- */
2493static int __init gspca_init(void)
2494{
54826437 2495 info("v%d.%d.%d registered",
bb64e86c
JFM		 2496 (DRIVER_VERSION_NUMBER >> 16) & 0xff,
2497 (DRIVER_VERSION_NUMBER >> 8) & 0xff,
2498 DRIVER_VERSION_NUMBER & 0xff);
63eb9546
JFM		 2499 return 0;
2500}
2501static void __exit gspca_exit(void)
2502{
63eb9546
JFM		 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 6.x block layer and io_uring tree(s)