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[media] gspca - main: Version change
[deliverable/linux.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
JFM		 322 /* check the packet status and length */
323 len = urb->iso_frame_desc[i].actual_length;
ff374747
JFM		 324 if (len == 0) {
325 if (gspca_dev->empty_packet == 0)
326 gspca_dev->empty_packet = 1;
6a7eba24 327 continue;
ff374747 328 }
63eb9546
JFM		 329 st = urb->iso_frame_desc[i].status;
330 if (st) {
0b656321 331 err("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)
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 654 if (gspca_dev->cam.reverse_alts) {
f43402fa 655 if (gspca_dev->audio && i < gspca_dev->nbalt - 2)
35680baa 656 i++;
a511ba94
HG		 657 while (++i < gspca_dev->nbalt) {
658 ep = alt_xfer(&intf->altsetting[i], xfer);
659 if (ep)
660 break;
661 }
662 } else {
f43402fa 663 if (gspca_dev->audio && i > 1)
35680baa 664 i--;
a511ba94
HG		 665 while (--i >= 0) {
666 ep = alt_xfer(&intf->altsetting[i], xfer);
667 if (ep)
668 break;
669 }
63eb9546 670 }
6a7eba24 671 if (ep == NULL) {
6929dc6b
JFM		 672 err("no transfer endpoint found");
673 return NULL;
63eb9546 674 }
0be01004 675 PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
63eb9546 676 i, ep->desc.bEndpointAddress);
1c8336d3 677 gspca_dev->alt = i; /* memorize the current alt setting */
8dd07ef1 678 if (gspca_dev->nbalt > 1) {
95d9142c
JFM		 679 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
680 if (ret < 0) {
6929dc6b 681 err("set alt %d err %d", i, ret);
0274d42e 682 ep = NULL;
95d9142c 683 }
63eb9546 684 }
63eb9546
JFM		 685 return ep;
686}
687
688/*
0be01004 689 * create the URBs for image transfer
63eb9546
JFM		 690 */
691static int create_urbs(struct gspca_dev *gspca_dev,
692 struct usb_host_endpoint *ep)
693{
694 struct urb *urb;
d43fa32f 695 int n, nurbs, i, psize, npkt, bsize;
63eb9546
JFM		 696
697 /* calculate the packet size and the number of packets */
63eb9546 698 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
d43fa32f 699
6929dc6b 700 if (!gspca_dev->cam.bulk) { /* isoc */
95d9142c
JFM		 701
702 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
1f53b0b0
JFM		 703 if (gspca_dev->pkt_size == 0)
704 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
705 else
706 psize = gspca_dev->pkt_size;
49cb6b04
JFM		 707 npkt = gspca_dev->cam.npkt;
708 if (npkt == 0)
709 npkt = 32; /* default value */
0be01004
JFM		 710 bsize = psize * npkt;
711 PDEBUG(D_STREAM,
712 "isoc %d pkts size %d = bsize:%d",
713 npkt, psize, bsize);
51977a8d 714 nurbs = DEF_NURBS;
95d9142c 715 } else { /* bulk */
0be01004 716 npkt = 0;
dff369aa 717 bsize = gspca_dev->cam.bulk_size;
95d9142c
JFM		 718 if (bsize == 0)
719 bsize = psize;
0be01004 720 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
dff369aa
AO		 721 if (gspca_dev->cam.bulk_nurbs != 0)
722 nurbs = gspca_dev->cam.bulk_nurbs;
723 else
724 nurbs = 1;
0be01004
JFM		 725 }
726
d43fa32f 727 for (n = 0; n < nurbs; n++) {
63eb9546
JFM		 728 urb = usb_alloc_urb(npkt, GFP_KERNEL);
729 if (!urb) {
730 err("usb_alloc_urb failed");
731 return -ENOMEM;
732 }
db870875 733 gspca_dev->urb[n] = urb;
997ea58e 734 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
63eb9546
JFM		 735 bsize,
736 GFP_KERNEL,
737 &urb->transfer_dma);
738
4aa0d037 739 if (urb->transfer_buffer == NULL) {
997ea58e 740 err("usb_alloc_coherent failed");
63eb9546
JFM		 741 return -ENOMEM;
742 }
63eb9546
JFM		 743 urb->dev = gspca_dev->dev;
744 urb->context = gspca_dev;
63eb9546 745 urb->transfer_buffer_length = bsize;
0be01004
JFM		 746 if (npkt != 0) { /* ISOC */
747 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
748 ep->desc.bEndpointAddress);
6c49da7f
FZ		 749 urb->transfer_flags = URB_ISO_ASAP
750 | URB_NO_TRANSFER_DMA_MAP;
0be01004
JFM		 751 urb->interval = ep->desc.bInterval;
752 urb->complete = isoc_irq;
753 urb->number_of_packets = npkt;
754 for (i = 0; i < npkt; i++) {
755 urb->iso_frame_desc[i].length = psize;
756 urb->iso_frame_desc[i].offset = psize * i;
757 }
758 } else { /* bulk */
759 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
760 ep->desc.bEndpointAddress),
6c49da7f 761 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
0be01004 762 urb->complete = bulk_irq;
63eb9546
JFM		 763 }
764 }
765 return 0;
766}
767
768/*
769 * start the USB transfer
770 */
771static int gspca_init_transfer(struct gspca_dev *gspca_dev)
772{
63eb9546 773 struct usb_host_endpoint *ep;
db870875 774 struct urb *urb;
63eb9546
JFM		 775 int n, ret;
776
e2997a72
HG		 777 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
778 return -ERESTARTSYS;
63eb9546 779
090264e5
JFM		 780 if (!gspca_dev->present) {
781 ret = -ENODEV;
314b3e08 782 goto unlock;
090264e5
JFM		 783 }
784
f7059eaa
JFM		 785 /* reset the streaming variables */
786 gspca_dev->image = NULL;
787 gspca_dev->image_len = 0;
788 gspca_dev->last_packet_type = DISCARD_PACKET;
789 gspca_dev->sequence = 0;
790
ab6c8cf2
JFM		 791 gspca_dev->usb_err = 0;
792
d43fa32f
JFM		 793 /* set the higher alternate setting and
794 * loop until urb submit succeeds */
a511ba94
HG		 795 if (gspca_dev->cam.reverse_alts)
796 gspca_dev->alt = 0;
797 else
798 gspca_dev->alt = gspca_dev->nbalt;
799
1f53b0b0
JFM		 800 if (gspca_dev->sd_desc->isoc_init) {
801 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
802 if (ret < 0)
314b3e08 803 goto unlock;
1f53b0b0 804 }
314b3e08
HG		 805
806 gspca_input_destroy_urb(gspca_dev);
1f53b0b0
JFM		 807 ep = get_ep(gspca_dev);
808 if (ep == NULL) {
809 ret = -EIO;
810 goto out;
811 }
63eb9546 812 for (;;) {
47aaca96
JFM		 813 if (!gspca_dev->cam.no_urb_create) {
814 PDEBUG(D_STREAM, "init transfer alt %d",
815 gspca_dev->alt);
816 ret = create_urbs(gspca_dev, ep);
817 if (ret < 0) {
818 destroy_urbs(gspca_dev);
819 goto out;
820 }
db870875 821 }
63eb9546 822
8fe2f1d5 823 /* clear the bulk endpoint */
6929dc6b 824 if (gspca_dev->cam.bulk)
8fe2f1d5 825 usb_clear_halt(gspca_dev->dev,
50e06dee 826 gspca_dev->urb[0]->pipe);
8fe2f1d5 827
63eb9546 828 /* start the cam */
72ab97ce
JFM		 829 ret = gspca_dev->sd_desc->start(gspca_dev);
830 if (ret < 0) {
831 destroy_urbs(gspca_dev);
832 goto out;
833 }
63eb9546 834 gspca_dev->streaming = 1;
63eb9546 835
dff369aa 836 /* some bulk transfers are started by the subdriver */
6929dc6b 837 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
51977a8d
JFM		 838 break;
839
63eb9546 840 /* submit the URBs */
db870875
JFM		 841 for (n = 0; n < MAX_NURBS; n++) {
842 urb = gspca_dev->urb[n];
843 if (urb == NULL)
844 break;
845 ret = usb_submit_urb(urb, GFP_KERNEL);
1f53b0b0
JFM		 846 if (ret < 0)
847 break;
63eb9546
JFM		 848 }
849 if (ret >= 0)
850 break;
e4dac289 851 gspca_stream_off(gspca_dev);
4bdf4a83 852 if (ret != -ENOSPC) {
0b656321 853 err("usb_submit_urb alt %d err %d",
4bdf4a83 854 gspca_dev->alt, ret);
1f53b0b0 855 goto out;
4bdf4a83 856 }
1f53b0b0
JFM		 857
858 /* the bandwidth is not wide enough
859 * negociate or try a lower alternate setting */
4bdf4a83
JFM		 860 PDEBUG(D_ERR|D_STREAM,
861 "bandwidth not wide enough - trying again");
1f53b0b0
JFM		 862 msleep(20); /* wait for kill complete */
863 if (gspca_dev->sd_desc->isoc_nego) {
864 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
865 if (ret < 0)
866 goto out;
867 } else {
868 ep = get_ep(gspca_dev);
869 if (ep == NULL) {
870 ret = -EIO;
871 goto out;
872 }
873 }
63eb9546
JFM		 874 }
875out:
314b3e08
HG		 876 gspca_input_create_urb(gspca_dev);
877unlock:
63eb9546
JFM		 878 mutex_unlock(&gspca_dev->usb_lock);
879 return ret;
880}
881
d43fa32f 882static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
63eb9546 883{
6a33091f 884 struct gspca_ctrl *ctrl;
63eb9546
JFM		 885 int i;
886
887 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
888 gspca_dev->curr_mode = i;
889 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
890 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
c2446b3e 891 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
6a33091f
JFM		 892
893 /* set the current control values to their default values
894 * which may have changed in sd_init() */
895 ctrl = gspca_dev->cam.ctrls;
896 if (ctrl != NULL) {
897 for (i = 0;
898 i < gspca_dev->sd_desc->nctrls;
899 i++, ctrl++)
900 ctrl->val = ctrl->def;
901 }
63eb9546
JFM		 902}
903
904static int wxh_to_mode(struct gspca_dev *gspca_dev,
905 int width, int height)
906{
907 int i;
908
d43fa32f
JFM		 909 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
910 if (width >= gspca_dev->cam.cam_mode[i].width
911 && height >= gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 912 break;
913 }
63eb9546
JFM		 914 return i;
915}
916
63eb9546
JFM		 917/*
918 * search a mode with the right pixel format
919 */
920static int gspca_get_mode(struct gspca_dev *gspca_dev,
921 int mode,
922 int pixfmt)
923{
924 int modeU, modeD;
925
926 modeU = modeD = mode;
927 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
928 if (--modeD >= 0) {
c2446b3e
JFM		 929 if (gspca_dev->cam.cam_mode[modeD].pixelformat
930 == pixfmt)
63eb9546
JFM		 931 return modeD;
932 }
933 if (++modeU < gspca_dev->cam.nmodes) {
c2446b3e
JFM		 934 if (gspca_dev->cam.cam_mode[modeU].pixelformat
935 == pixfmt)
63eb9546
JFM		 936 return modeU;
937 }
938 }
939 return -EINVAL;
940}
941
af1d9afa
BJ		 942#ifdef CONFIG_VIDEO_ADV_DEBUG
943static int vidioc_g_register(struct file *file, void *priv,
944 struct v4l2_dbg_register *reg)
945{
946 int ret;
947 struct gspca_dev *gspca_dev = priv;
948
949 if (!gspca_dev->sd_desc->get_chip_ident)
950 return -EINVAL;
951
952 if (!gspca_dev->sd_desc->get_register)
953 return -EINVAL;
954
955 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
956 return -ERESTARTSYS;
8c4ebae4 957 gspca_dev->usb_err = 0;
af1d9afa
BJ		 958 if (gspca_dev->present)
959 ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
960 else
961 ret = -ENODEV;
962 mutex_unlock(&gspca_dev->usb_lock);
963
964 return ret;
965}
966
967static int vidioc_s_register(struct file *file, void *priv,
968 struct v4l2_dbg_register *reg)
969{
970 int ret;
971 struct gspca_dev *gspca_dev = priv;
972
973 if (!gspca_dev->sd_desc->get_chip_ident)
974 return -EINVAL;
975
976 if (!gspca_dev->sd_desc->set_register)
977 return -EINVAL;
978
979 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
980 return -ERESTARTSYS;
8c4ebae4 981 gspca_dev->usb_err = 0;
af1d9afa
BJ		 982 if (gspca_dev->present)
983 ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
984 else
985 ret = -ENODEV;
986 mutex_unlock(&gspca_dev->usb_lock);
987
988 return ret;
989}
990#endif
991
992static int vidioc_g_chip_ident(struct file *file, void *priv,
993 struct v4l2_dbg_chip_ident *chip)
994{
995 int ret;
996 struct gspca_dev *gspca_dev = priv;
997
998 if (!gspca_dev->sd_desc->get_chip_ident)
999 return -EINVAL;
1000
1001 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1002 return -ERESTARTSYS;
8c4ebae4 1003 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1004 if (gspca_dev->present)
1005 ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
1006 else
1007 ret = -ENODEV;
1008 mutex_unlock(&gspca_dev->usb_lock);
1009
1010 return ret;
1011}
1012
e078770a 1013static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1014 struct v4l2_fmtdesc *fmtdesc)
1015{
1016 struct gspca_dev *gspca_dev = priv;
6a7eba24 1017 int i, j, index;
63eb9546
JFM		 1018 __u32 fmt_tb[8];
1019
63eb9546
JFM		 1020 /* give an index to each format */
1021 index = 0;
1022 j = 0;
1023 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
c2446b3e 1024 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
63eb9546
JFM		 1025 j = 0;
1026 for (;;) {
1027 if (fmt_tb[j] == fmt_tb[index])
1028 break;
1029 j++;
1030 }
1031 if (j == index) {
1032 if (fmtdesc->index == index)
1033 break; /* new format */
1034 index++;
80297125 1035 if (index >= ARRAY_SIZE(fmt_tb))
63eb9546
JFM		 1036 return -EINVAL;
1037 }
1038 }
1039 if (i < 0)
1040 return -EINVAL; /* no more format */
1041
63eb9546
JFM		 1042 fmtdesc->pixelformat = fmt_tb[index];
1043 if (gspca_is_compressed(fmt_tb[index]))
1044 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1045 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1046 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1047 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1048 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1049 fmtdesc->description[4] = '\0';
1050 return 0;
1051}
1052
e078770a 1053static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1054 struct v4l2_format *fmt)
1055{
1056 struct gspca_dev *gspca_dev = priv;
c2446b3e 1057 int mode;
63eb9546 1058
c2446b3e
JFM		 1059 mode = gspca_dev->curr_mode;
1060 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1061 sizeof fmt->fmt.pix);
63eb9546
JFM		 1062 return 0;
1063}
1064
e078770a 1065static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1066 struct v4l2_format *fmt)
1067{
24c530b4 1068 int w, h, mode, mode2;
63eb9546 1069
4aa0d037
JFM		 1070 w = fmt->fmt.pix.width;
1071 h = fmt->fmt.pix.height;
d43fa32f 1072
335b3f88 1073#ifdef GSPCA_DEBUG
63eb9546
JFM		 1074 if (gspca_debug & D_CONF)
1075 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1076#endif
1077 /* search the closest mode for width and height */
1078 mode = wxh_to_mode(gspca_dev, w, h);
1079
1080 /* OK if right palette */
c2446b3e
JFM		 1081 if (gspca_dev->cam.cam_mode[mode].pixelformat
1082 != fmt->fmt.pix.pixelformat) {
63eb9546
JFM		 1083
1084 /* else, search the closest mode with the same pixel format */
1085 mode2 = gspca_get_mode(gspca_dev, mode,
1086 fmt->fmt.pix.pixelformat);
c2446b3e 1087 if (mode2 >= 0)
63eb9546 1088 mode = mode2;
c2446b3e
JFM		 1089/* else
1090 ; * no chance, return this mode */
63eb9546 1091 }
c2446b3e
JFM		 1092 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1093 sizeof fmt->fmt.pix);
63eb9546
JFM		 1094 return mode; /* used when s_fmt */
1095}
1096
e078770a 1097static int vidioc_try_fmt_vid_cap(struct file *file,
63eb9546
JFM		 1098 void *priv,
1099 struct v4l2_format *fmt)
1100{
4aa0d037 1101 struct gspca_dev *gspca_dev = priv;
63eb9546
JFM		 1102 int ret;
1103
e078770a 1104 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1105 if (ret < 0)
1106 return ret;
1107 return 0;
1108}
1109
e078770a 1110static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1111 struct v4l2_format *fmt)
1112{
1113 struct gspca_dev *gspca_dev = priv;
d43fa32f 1114 int ret;
63eb9546 1115
e2997a72
HG		 1116 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1117 return -ERESTARTSYS;
d43fa32f 1118
e078770a 1119 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1120 if (ret < 0)
1121 goto out;
1122
d43fa32f
JFM		 1123 if (gspca_dev->nframes != 0
1124 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1125 ret = -EINVAL;
1126 goto out;
1127 }
1128
50a871fe
JFM		 1129 if (ret == gspca_dev->curr_mode) {
1130 ret = 0;
63eb9546 1131 goto out; /* same mode */
50a871fe 1132 }
d43fa32f
JFM		 1133
1134 if (gspca_dev->streaming) {
1135 ret = -EBUSY;
1136 goto out;
e2997a72 1137 }
4aa0d037
JFM		 1138 gspca_dev->width = fmt->fmt.pix.width;
1139 gspca_dev->height = fmt->fmt.pix.height;
63eb9546
JFM		 1140 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1141 gspca_dev->curr_mode = ret;
d43fa32f 1142
d43fa32f 1143 ret = 0;
63eb9546
JFM		 1144out:
1145 mutex_unlock(&gspca_dev->queue_lock);
1146 return ret;
1147}
1148
11c635a2
HG		 1149static int vidioc_enum_framesizes(struct file *file, void *priv,
1150 struct v4l2_frmsizeenum *fsize)
1151{
1152 struct gspca_dev *gspca_dev = priv;
1153 int i;
1154 __u32 index = 0;
1155
1156 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1157 if (fsize->pixel_format !=
1158 gspca_dev->cam.cam_mode[i].pixelformat)
1159 continue;
1160
1161 if (fsize->index == index) {
1162 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1163 fsize->discrete.width =
1164 gspca_dev->cam.cam_mode[i].width;
1165 fsize->discrete.height =
1166 gspca_dev->cam.cam_mode[i].height;
1167 return 0;
1168 }
1169 index++;
1170 }
1171
1172 return -EINVAL;
1173}
1174
28ffe77f
AO		 1175static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1176 struct v4l2_frmivalenum *fival)
1177{
1178 struct gspca_dev *gspca_dev = priv;
1179 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1180 __u32 i;
1181
1182 if (gspca_dev->cam.mode_framerates == NULL ||
1183 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1184 return -EINVAL;
1185
1186 if (fival->pixel_format !=
1187 gspca_dev->cam.cam_mode[mode].pixelformat)
1188 return -EINVAL;
1189
1190 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1191 if (fival->index == i) {
1192 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1193 fival->discrete.numerator = 1;
1194 fival->discrete.denominator =
1195 gspca_dev->cam.mode_framerates[mode].rates[i];
1196 return 0;
1197 }
1198 }
1199
1200 return -EINVAL;
1201}
1202
d0182306 1203static void gspca_release(struct video_device *vfd)
6b060ffe 1204{
d0182306 1205 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
6b060ffe 1206
38c7c036
LP		 1207 PDEBUG(D_PROBE, "%s released",
1208 video_device_node_name(&gspca_dev->vdev));
6b060ffe
FZ		 1209
1210 kfree(gspca_dev->usb_buf);
1211 kfree(gspca_dev);
1212}
1213
bec43661 1214static int dev_open(struct file *file)
63eb9546
JFM		 1215{
1216 struct gspca_dev *gspca_dev;
1217 int ret;
1218
0d07e240 1219 PDEBUG(D_STREAM, "[%s] open", current->comm);
a12ca6a6 1220 gspca_dev = (struct gspca_dev *) video_devdata(file);
e2997a72
HG		 1221 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1222 return -ERESTARTSYS;
63eb9546
JFM		 1223 if (!gspca_dev->present) {
1224 ret = -ENODEV;
1225 goto out;
1226 }
1227
012d6b02 1228 if (gspca_dev->users > 4) { /* (arbitrary value) */
63eb9546
JFM		 1229 ret = -EBUSY;
1230 goto out;
1231 }
5c4fa002
JFM		 1232
1233 /* protect the subdriver against rmmod */
1234 if (!try_module_get(gspca_dev->module)) {
1235 ret = -ENODEV;
1236 goto out;
1237 }
1238
63eb9546 1239 gspca_dev->users++;
6b060ffe 1240
63eb9546 1241 file->private_data = gspca_dev;
335b3f88 1242#ifdef GSPCA_DEBUG
63eb9546 1243 /* activate the v4l2 debug */
d43fa32f 1244 if (gspca_debug & D_V4L2)
a12ca6a6 1245 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
9de436cf 1246 | V4L2_DEBUG_IOCTL_ARG;
63eb9546 1247 else
a12ca6a6 1248 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
9de436cf 1249 | V4L2_DEBUG_IOCTL_ARG);
63eb9546 1250#endif
012d6b02 1251 ret = 0;
63eb9546
JFM		 1252out:
1253 mutex_unlock(&gspca_dev->queue_lock);
1254 if (ret != 0)
1255 PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
1256 else
d43fa32f 1257 PDEBUG(D_STREAM, "open done");
63eb9546
JFM		 1258 return ret;
1259}
1260
bec43661 1261static int dev_close(struct file *file)
63eb9546
JFM		 1262{
1263 struct gspca_dev *gspca_dev = file->private_data;
1264
0d07e240 1265 PDEBUG(D_STREAM, "[%s] close", current->comm);
e2997a72
HG		 1266 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1267 return -ERESTARTSYS;
1268 gspca_dev->users--;
e2997a72 1269
5b77ae77 1270 /* if the file did the capture, free the streaming resources */
4aa0d037 1271 if (gspca_dev->capt_file == file) {
a1e8288b
JFM		 1272 if (gspca_dev->streaming) {
1273 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1274 gspca_dev->usb_err = 0;
a1e8288b
JFM		 1275 gspca_stream_off(gspca_dev);
1276 mutex_unlock(&gspca_dev->usb_lock);
1277 }
4aa0d037 1278 frame_free(gspca_dev);
efab8211 1279 gspca_dev->capt_file = NULL;
d43fa32f 1280 gspca_dev->memory = GSPCA_MEMORY_NO;
4aa0d037 1281 }
d43fa32f 1282 file->private_data = NULL;
5c4fa002 1283 module_put(gspca_dev->module);
63eb9546 1284 mutex_unlock(&gspca_dev->queue_lock);
6b060ffe 1285
d43fa32f 1286 PDEBUG(D_STREAM, "close done");
6b060ffe 1287
63eb9546
JFM		 1288 return 0;
1289}
1290
1291static int vidioc_querycap(struct file *file, void *priv,
1292 struct v4l2_capability *cap)
1293{
1294 struct gspca_dev *gspca_dev = priv;
090264e5 1295 int ret;
63eb9546 1296
090264e5
JFM		 1297 /* protect the access to the usb device */
1298 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1299 return -ERESTARTSYS;
1300 if (!gspca_dev->present) {
1301 ret = -ENODEV;
1302 goto out;
1303 }
63eb9546 1304 strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
c6edaf16
JFM		 1305 if (gspca_dev->dev->product != NULL) {
1306 strncpy(cap->card, gspca_dev->dev->product,
1307 sizeof cap->card);
1308 } else {
1309 snprintf(cap->card, sizeof cap->card,
1310 "USB Camera (%04x:%04x)",
1311 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1312 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1313 }
5932028f 1314 usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info));
63eb9546
JFM		 1315 cap->version = DRIVER_VERSION_NUMBER;
1316 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
1317 | V4L2_CAP_STREAMING
1318 | V4L2_CAP_READWRITE;
090264e5
JFM		 1319 ret = 0;
1320out:
1321 mutex_unlock(&gspca_dev->usb_lock);
1322 return ret;
63eb9546
JFM		 1323}
1324
6a33091f 1325static int get_ctrl(struct gspca_dev *gspca_dev,
a0001a28
HG		 1326 int id)
1327{
1328 const struct ctrl *ctrls;
1329 int i;
1330
1331 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1332 i < gspca_dev->sd_desc->nctrls;
1333 i++, ctrls++) {
1334 if (gspca_dev->ctrl_dis & (1 << i))
1335 continue;
1336 if (id == ctrls->qctrl.id)
6a33091f 1337 return i;
a0001a28 1338 }
6a33091f 1339 return -1;
a0001a28
HG		 1340}
1341
63eb9546
JFM		 1342static int vidioc_queryctrl(struct file *file, void *priv,
1343 struct v4l2_queryctrl *q_ctrl)
1344{
1345 struct gspca_dev *gspca_dev = priv;
a0001a28 1346 const struct ctrl *ctrls;
6a33091f
JFM		 1347 struct gspca_ctrl *gspca_ctrl;
1348 int i, idx;
6a7eba24
JFM		 1349 u32 id;
1350
1351 id = q_ctrl->id;
1352 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1353 id &= V4L2_CTRL_ID_MASK;
1354 id++;
6a33091f 1355 idx = -1;
6a7eba24 1356 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
a0001a28 1357 if (gspca_dev->ctrl_dis & (1 << i))
f50ba1be 1358 continue;
b8bfb5fb 1359 if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
f50ba1be 1360 continue;
6a33091f
JFM		 1361 if (idx >= 0
1362 && gspca_dev->sd_desc->ctrls[i].qctrl.id
780e3121 1363 > gspca_dev->sd_desc->ctrls[idx].qctrl.id)
b8bfb5fb 1364 continue;
6a33091f 1365 idx = i;
63eb9546 1366 }
a0001a28 1367 } else {
6a33091f 1368 idx = get_ctrl(gspca_dev, id);
63eb9546 1369 }
6a33091f
JFM		 1370 if (idx < 0)
1371 return -EINVAL;
1372 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1373 memcpy(q_ctrl, &ctrls->qctrl, sizeof *q_ctrl);
1374 if (gspca_dev->cam.ctrls != NULL) {
1375 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1376 q_ctrl->default_value = gspca_ctrl->def;
1377 q_ctrl->minimum = gspca_ctrl->min;
1378 q_ctrl->maximum = gspca_ctrl->max;
1379 }
1380 if (gspca_dev->ctrl_inac & (1 << idx))
4af85668 1381 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
f50ba1be 1382 return 0;
63eb9546
JFM		 1383}
1384
1385static int vidioc_s_ctrl(struct file *file, void *priv,
1386 struct v4l2_control *ctrl)
1387{
1388 struct gspca_dev *gspca_dev = priv;
a5ae2062 1389 const struct ctrl *ctrls;
6a33091f
JFM		 1390 struct gspca_ctrl *gspca_ctrl;
1391 int idx, ret;
63eb9546 1392
6a33091f
JFM		 1393 idx = get_ctrl(gspca_dev, ctrl->id);
1394 if (idx < 0)
a0001a28 1395 return -EINVAL;
6a33091f
JFM		 1396 if (gspca_dev->ctrl_inac & (1 << idx))
1397 return -EINVAL;
1398 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1399 if (gspca_dev->cam.ctrls != NULL) {
1400 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1401 if (ctrl->value < gspca_ctrl->min
1402 || ctrl->value > gspca_ctrl->max)
1403 return -ERANGE;
1404 } else {
1405 gspca_ctrl = NULL;
1406 if (ctrl->value < ctrls->qctrl.minimum
1407 || ctrl->value > ctrls->qctrl.maximum)
1408 return -ERANGE;
1409 }
a0001a28
HG		 1410 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1411 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1412 return -ERESTARTSYS;
6a33091f
JFM		 1413 if (!gspca_dev->present) {
1414 ret = -ENODEV;
1415 goto out;
1416 }
8c4ebae4 1417 gspca_dev->usb_err = 0;
6a33091f 1418 if (ctrls->set != NULL) {
a0001a28 1419 ret = ctrls->set(gspca_dev, ctrl->value);
6a33091f
JFM		 1420 goto out;
1421 }
1422 if (gspca_ctrl != NULL) {
1423 gspca_ctrl->val = ctrl->value;
1424 if (ctrls->set_control != NULL
1425 && gspca_dev->streaming)
1426 ctrls->set_control(gspca_dev);
1427 }
1428 ret = gspca_dev->usb_err;
1429out:
a0001a28
HG		 1430 mutex_unlock(&gspca_dev->usb_lock);
1431 return ret;
63eb9546
JFM		 1432}
1433
1434static int vidioc_g_ctrl(struct file *file, void *priv,
1435 struct v4l2_control *ctrl)
1436{
1437 struct gspca_dev *gspca_dev = priv;
a5ae2062 1438 const struct ctrl *ctrls;
6a33091f 1439 int idx, ret;
63eb9546 1440
6a33091f
JFM		 1441 idx = get_ctrl(gspca_dev, ctrl->id);
1442 if (idx < 0)
a0001a28 1443 return -EINVAL;
6a33091f 1444 ctrls = &gspca_dev->sd_desc->ctrls[idx];
a0001a28
HG		 1445
1446 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1447 return -ERESTARTSYS;
6a33091f
JFM		 1448 if (!gspca_dev->present) {
1449 ret = -ENODEV;
1450 goto out;
1451 }
8c4ebae4 1452 gspca_dev->usb_err = 0;
6a33091f 1453 if (ctrls->get != NULL) {
a0001a28 1454 ret = ctrls->get(gspca_dev, &ctrl->value);
6a33091f
JFM		 1455 goto out;
1456 }
1457 if (gspca_dev->cam.ctrls != NULL)
1458 ctrl->value = gspca_dev->cam.ctrls[idx].val;
1459 ret = 0;
1460out:
a0001a28
HG		 1461 mutex_unlock(&gspca_dev->usb_lock);
1462 return ret;
63eb9546
JFM		 1463}
1464
1465static int vidioc_querymenu(struct file *file, void *priv,
1466 struct v4l2_querymenu *qmenu)
1467{
1468 struct gspca_dev *gspca_dev = priv;
1469
1470 if (!gspca_dev->sd_desc->querymenu)
1471 return -EINVAL;
1472 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1473}
1474
1475static int vidioc_enum_input(struct file *file, void *priv,
1476 struct v4l2_input *input)
1477{
1478 struct gspca_dev *gspca_dev = priv;
1479
1480 if (input->index != 0)
1481 return -EINVAL;
63eb9546 1482 input->type = V4L2_INPUT_TYPE_CAMERA;
dfa76fa2 1483 input->status = gspca_dev->cam.input_flags;
63eb9546
JFM		 1484 strncpy(input->name, gspca_dev->sd_desc->name,
1485 sizeof input->name);
1486 return 0;
1487}
1488
1489static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1490{
1491 *i = 0;
1492 return 0;
1493}
1494
1495static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1496{
1497 if (i > 0)
1498 return -EINVAL;
1499 return (0);
1500}
1501
1502static int vidioc_reqbufs(struct file *file, void *priv,
1503 struct v4l2_requestbuffers *rb)
1504{
1505 struct gspca_dev *gspca_dev = priv;
832d0a91 1506 int i, ret = 0, streaming;
63eb9546 1507
a2ba6f27
JFM		 1508 i = rb->memory; /* (avoid compilation warning) */
1509 switch (i) {
5b77ae77 1510 case GSPCA_MEMORY_READ: /* (internal call) */
d43fa32f 1511 case V4L2_MEMORY_MMAP:
d43fa32f 1512 case V4L2_MEMORY_USERPTR:
6a7eba24 1513 break;
d43fa32f 1514 default:
63eb9546 1515 return -EINVAL;
d43fa32f 1516 }
e2997a72
HG		 1517 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1518 return -ERESTARTSYS;
d43fa32f 1519
5b77ae77
JFM		 1520 if (gspca_dev->memory != GSPCA_MEMORY_NO
1521 && gspca_dev->memory != rb->memory) {
4aa0d037
JFM		 1522 ret = -EBUSY;
1523 goto out;
1524 }
d43fa32f 1525
5b77ae77
JFM		 1526 /* only one file may do the capture */
1527 if (gspca_dev->capt_file != NULL
1528 && gspca_dev->capt_file != file) {
1529 ret = -EBUSY;
1530 goto out;
1531 }
1532
1533 /* if allocated, the buffers must not be mapped */
1534 for (i = 0; i < gspca_dev->nframes; i++) {
1535 if (gspca_dev->frame[i].vma_use_count) {
ac0d6df6
JFM		 1536 ret = -EBUSY;
1537 goto out;
1538 }
5b77ae77
JFM		 1539 }
1540
1541 /* stop streaming */
832d0a91
JFM		 1542 streaming = gspca_dev->streaming;
1543 if (streaming) {
5b77ae77 1544 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1545 gspca_dev->usb_err = 0;
5b77ae77
JFM		 1546 gspca_stream_off(gspca_dev);
1547 mutex_unlock(&gspca_dev->usb_lock);
1548 }
1549
1550 /* free the previous allocated buffers, if any */
1551 if (gspca_dev->nframes != 0) {
1552 frame_free(gspca_dev);
1553 gspca_dev->capt_file = NULL;
1554 }
1555 if (rb->count == 0) /* unrequest */
1556 goto out;
1557 gspca_dev->memory = rb->memory;
1558 ret = frame_alloc(gspca_dev, rb->count);
1559 if (ret == 0) {
1560 rb->count = gspca_dev->nframes;
1561 gspca_dev->capt_file = file;
832d0a91
JFM		 1562 if (streaming)
1563 ret = gspca_init_transfer(gspca_dev);
4aa0d037
JFM		 1564 }
1565out:
63eb9546
JFM		 1566 mutex_unlock(&gspca_dev->queue_lock);
1567 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1568 return ret;
1569}
1570
1571static int vidioc_querybuf(struct file *file, void *priv,
1572 struct v4l2_buffer *v4l2_buf)
1573{
1574 struct gspca_dev *gspca_dev = priv;
1575 struct gspca_frame *frame;
1576
13752bd9 1577 if (v4l2_buf->index < 0
63eb9546
JFM		 1578 || v4l2_buf->index >= gspca_dev->nframes)
1579 return -EINVAL;
1580
1581 frame = &gspca_dev->frame[v4l2_buf->index];
1582 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1583 return 0;
1584}
1585
1586static int vidioc_streamon(struct file *file, void *priv,
1587 enum v4l2_buf_type buf_type)
1588{
1589 struct gspca_dev *gspca_dev = priv;
1590 int ret;
1591
63eb9546
JFM		 1592 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1593 return -EINVAL;
e2997a72
HG		 1594 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1595 return -ERESTARTSYS;
090264e5 1596
18bf99aa
JFM		 1597 /* check the capture file */
1598 if (gspca_dev->capt_file != file) {
1599 ret = -EBUSY;
1600 goto out;
1601 }
1602
1edabe71
JFM		 1603 if (gspca_dev->nframes == 0
1604 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
63eb9546
JFM		 1605 ret = -EINVAL;
1606 goto out;
1607 }
1608 if (!gspca_dev->streaming) {
1609 ret = gspca_init_transfer(gspca_dev);
1610 if (ret < 0)
1611 goto out;
1612 }
335b3f88 1613#ifdef GSPCA_DEBUG
63eb9546
JFM		 1614 if (gspca_debug & D_STREAM) {
1615 PDEBUG_MODE("stream on OK",
1616 gspca_dev->pixfmt,
1617 gspca_dev->width,
1618 gspca_dev->height);
1619 }
1620#endif
e2997a72 1621 ret = 0;
63eb9546
JFM		 1622out:
1623 mutex_unlock(&gspca_dev->queue_lock);
1624 return ret;
1625}
1626
1627static int vidioc_streamoff(struct file *file, void *priv,
1628 enum v4l2_buf_type buf_type)
1629{
1630 struct gspca_dev *gspca_dev = priv;
f7059eaa 1631 int ret;
63eb9546 1632
63eb9546
JFM		 1633 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1634 return -EINVAL;
4aa0d037
JFM		 1635 if (!gspca_dev->streaming)
1636 return 0;
1637 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1638 return -ERESTARTSYS;
5b77ae77 1639
18bf99aa
JFM		 1640 /* check the capture file */
1641 if (gspca_dev->capt_file != file) {
1642 ret = -EBUSY;
1643 goto out;
1644 }
1645
5b77ae77 1646 /* stop streaming */
4aa0d037
JFM		 1647 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1648 ret = -ERESTARTSYS;
1649 goto out;
63eb9546 1650 }
8c4ebae4 1651 gspca_dev->usb_err = 0;
4aa0d037 1652 gspca_stream_off(gspca_dev);
4aa0d037 1653 mutex_unlock(&gspca_dev->usb_lock);
5b77ae77 1654
f7059eaa
JFM		 1655 /* empty the transfer queues */
1656 atomic_set(&gspca_dev->fr_q, 0);
1657 atomic_set(&gspca_dev->fr_i, 0);
1658 gspca_dev->fr_o = 0;
5b77ae77 1659 ret = 0;
4aa0d037
JFM		 1660out:
1661 mutex_unlock(&gspca_dev->queue_lock);
1662 return ret;
63eb9546
JFM		 1663}
1664
1665static int vidioc_g_jpegcomp(struct file *file, void *priv,
1666 struct v4l2_jpegcompression *jpegcomp)
1667{
1668 struct gspca_dev *gspca_dev = priv;
1669 int ret;
1670
1671 if (!gspca_dev->sd_desc->get_jcomp)
1672 return -EINVAL;
e2997a72
HG		 1673 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1674 return -ERESTARTSYS;
8c4ebae4 1675 gspca_dev->usb_err = 0;
090264e5
JFM		 1676 if (gspca_dev->present)
1677 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1678 else
1679 ret = -ENODEV;
63eb9546
JFM		 1680 mutex_unlock(&gspca_dev->usb_lock);
1681 return ret;
1682}
1683
1684static int vidioc_s_jpegcomp(struct file *file, void *priv,
1685 struct v4l2_jpegcompression *jpegcomp)
1686{
1687 struct gspca_dev *gspca_dev = priv;
1688 int ret;
1689
63eb9546
JFM		 1690 if (!gspca_dev->sd_desc->set_jcomp)
1691 return -EINVAL;
f86d4a91
JP		 1692 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1693 return -ERESTARTSYS;
8c4ebae4 1694 gspca_dev->usb_err = 0;
090264e5
JFM		 1695 if (gspca_dev->present)
1696 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1697 else
1698 ret = -ENODEV;
63eb9546
JFM		 1699 mutex_unlock(&gspca_dev->usb_lock);
1700 return ret;
1701}
1702
1703static int vidioc_g_parm(struct file *filp, void *priv,
1704 struct v4l2_streamparm *parm)
1705{
1706 struct gspca_dev *gspca_dev = priv;
1707
63eb9546 1708 parm->parm.capture.readbuffers = gspca_dev->nbufread;
627a5ef7
JP		 1709
1710 if (gspca_dev->sd_desc->get_streamparm) {
1711 int ret;
1712
1713 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1714 return -ERESTARTSYS;
8c4ebae4 1715 gspca_dev->usb_err = 0;
090264e5
JFM		 1716 if (gspca_dev->present)
1717 ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
1718 parm);
1719 else
1720 ret = -ENODEV;
627a5ef7
JP		 1721 mutex_unlock(&gspca_dev->usb_lock);
1722 return ret;
1723 }
1724
63eb9546
JFM		 1725 return 0;
1726}
1727
1728static int vidioc_s_parm(struct file *filp, void *priv,
1729 struct v4l2_streamparm *parm)
1730{
1731 struct gspca_dev *gspca_dev = priv;
1732 int n;
1733
63eb9546 1734 n = parm->parm.capture.readbuffers;
f7059eaa 1735 if (n == 0 || n >= GSPCA_MAX_FRAMES)
63eb9546
JFM		 1736 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1737 else
1738 gspca_dev->nbufread = n;
627a5ef7
JP		 1739
1740 if (gspca_dev->sd_desc->set_streamparm) {
1741 int ret;
1742
1743 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1744 return -ERESTARTSYS;
8c4ebae4 1745 gspca_dev->usb_err = 0;
090264e5
JFM		 1746 if (gspca_dev->present)
1747 ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
1748 parm);
1749 else
1750 ret = -ENODEV;
627a5ef7
JP		 1751 mutex_unlock(&gspca_dev->usb_lock);
1752 return ret;
1753 }
1754
63eb9546
JFM		 1755 return 0;
1756}
1757
63eb9546
JFM		 1758static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1759{
1760 struct gspca_dev *gspca_dev = file->private_data;
efab8211 1761 struct gspca_frame *frame;
63eb9546
JFM		 1762 struct page *page;
1763 unsigned long addr, start, size;
1764 int i, ret;
63eb9546
JFM		 1765
1766 start = vma->vm_start;
1767 size = vma->vm_end - vma->vm_start;
1768 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1769
e2997a72
HG		 1770 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1771 return -ERESTARTSYS;
63eb9546
JFM		 1772 if (!gspca_dev->present) {
1773 ret = -ENODEV;
4aa0d037
JFM		 1774 goto out;
1775 }
1776 if (gspca_dev->capt_file != file) {
1777 ret = -EINVAL;
1778 goto out;
63eb9546
JFM		 1779 }
1780
efab8211 1781 frame = NULL;
63eb9546
JFM		 1782 for (i = 0; i < gspca_dev->nframes; ++i) {
1783 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1784 PDEBUG(D_STREAM, "mmap bad memory type");
1785 break;
1786 }
1787 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1788 == vma->vm_pgoff) {
1789 frame = &gspca_dev->frame[i];
1790 break;
1791 }
1792 }
efab8211 1793 if (frame == NULL) {
63eb9546
JFM		 1794 PDEBUG(D_STREAM, "mmap no frame buffer found");
1795 ret = -EINVAL;
4aa0d037 1796 goto out;
63eb9546 1797 }
38bff697 1798 if (size != frame->v4l2_buf.length) {
63eb9546
JFM		 1799 PDEBUG(D_STREAM, "mmap bad size");
1800 ret = -EINVAL;
4aa0d037 1801 goto out;
63eb9546
JFM		 1802 }
1803
1804 /*
1805 * - VM_IO marks the area as being a mmaped region for I/O to a
1806 * device. It also prevents the region from being core dumped.
1807 */
1808 vma->vm_flags |= VM_IO;
1809
1810 addr = (unsigned long) frame->data;
1811 while (size > 0) {
1812 page = vmalloc_to_page((void *) addr);
1813 ret = vm_insert_page(vma, start, page);
1814 if (ret < 0)
4aa0d037 1815 goto out;
63eb9546
JFM		 1816 start += PAGE_SIZE;
1817 addr += PAGE_SIZE;
1818 size -= PAGE_SIZE;
1819 }
1820
d50e257e 1821 vma->vm_ops = &gspca_vm_ops;
63eb9546
JFM		 1822 vma->vm_private_data = frame;
1823 gspca_vm_open(vma);
e2997a72 1824 ret = 0;
4aa0d037 1825out:
63eb9546
JFM		 1826 mutex_unlock(&gspca_dev->queue_lock);
1827 return ret;
1828}
1829
63eb9546
JFM		 1830/*
1831 * wait for a video frame
1832 *
1833 * If a frame is ready, its index is returned.
1834 */
d43fa32f 1835static int frame_wait(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1836 int nonblock_ing)
1837{
f7059eaa 1838 int i, ret;
63eb9546 1839
d43fa32f 1840 /* check if a frame is ready */
63eb9546 1841 i = gspca_dev->fr_o;
f7059eaa 1842 if (i == atomic_read(&gspca_dev->fr_i)) {
181b704f
HG		 1843 if (nonblock_ing)
1844 return -EAGAIN;
1845
1846 /* wait till a frame is ready */
4aa0d037 1847 ret = wait_event_interruptible_timeout(gspca_dev->wq,
f7059eaa 1848 i != atomic_read(&gspca_dev->fr_i) ||
181b704f
HG		 1849 !gspca_dev->streaming || !gspca_dev->present,
1850 msecs_to_jiffies(3000));
1851 if (ret < 0)
1852 return ret;
1853 if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present)
e2997a72 1854 return -EIO;
63eb9546 1855 }
181b704f 1856
f7059eaa 1857 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
e2997a72 1858
739570bb
JFM		 1859 if (gspca_dev->sd_desc->dq_callback) {
1860 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1861 gspca_dev->usb_err = 0;
090264e5
JFM		 1862 if (gspca_dev->present)
1863 gspca_dev->sd_desc->dq_callback(gspca_dev);
739570bb
JFM		 1864 mutex_unlock(&gspca_dev->usb_lock);
1865 }
f7059eaa 1866 return gspca_dev->fr_queue[i];
63eb9546
JFM		 1867}
1868
1869/*
1870 * dequeue a video buffer
1871 *
1872 * If nonblock_ing is false, block until a buffer is available.
1873 */
1874static int vidioc_dqbuf(struct file *file, void *priv,
1875 struct v4l2_buffer *v4l2_buf)
1876{
1877 struct gspca_dev *gspca_dev = priv;
1878 struct gspca_frame *frame;
1879 int i, ret;
1880
1881 PDEBUG(D_FRAM, "dqbuf");
ac0d6df6 1882 if (v4l2_buf->memory != gspca_dev->memory)
63eb9546 1883 return -EINVAL;
5b77ae77 1884
090264e5
JFM		 1885 if (!gspca_dev->present)
1886 return -ENODEV;
1887
5b77ae77
JFM		 1888 /* if not streaming, be sure the application will not loop forever */
1889 if (!(file->f_flags & O_NONBLOCK)
1890 && !gspca_dev->streaming && gspca_dev->users == 1)
63eb9546
JFM		 1891 return -EINVAL;
1892
5b77ae77
JFM		 1893 /* only the capturing file may dequeue */
1894 if (gspca_dev->capt_file != file)
1895 return -EINVAL;
1896
1897 /* only one dequeue / read at a time */
63eb9546
JFM		 1898 if (mutex_lock_interruptible(&gspca_dev->read_lock))
1899 return -ERESTARTSYS;
1900
d43fa32f 1901 ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
63eb9546 1902 if (ret < 0)
4aa0d037 1903 goto out;
63eb9546
JFM		 1904 i = ret; /* frame index */
1905 frame = &gspca_dev->frame[i];
ac0d6df6 1906 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
c6eb8eaf 1907 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
ac0d6df6
JFM		 1908 frame->data,
1909 frame->v4l2_buf.bytesused)) {
1910 PDEBUG(D_ERR|D_STREAM,
1911 "dqbuf cp to user failed");
1912 ret = -EFAULT;
1913 goto out;
1914 }
1915 }
63eb9546
JFM		 1916 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1917 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1918 PDEBUG(D_FRAM, "dqbuf %d", i);
1919 ret = 0;
4aa0d037 1920out:
63eb9546
JFM		 1921 mutex_unlock(&gspca_dev->read_lock);
1922 return ret;
1923}
1924
1925/*
1926 * queue a video buffer
1927 *
1928 * Attempting to queue a buffer that has already been
1929 * queued will return -EINVAL.
1930 */
1931static int vidioc_qbuf(struct file *file, void *priv,
1932 struct v4l2_buffer *v4l2_buf)
1933{
1934 struct gspca_dev *gspca_dev = priv;
1935 struct gspca_frame *frame;
1936 int i, index, ret;
1937
1938 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
63eb9546 1939
5b77ae77
JFM		 1940 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1941 return -ERESTARTSYS;
1942
63eb9546
JFM		 1943 index = v4l2_buf->index;
1944 if ((unsigned) index >= gspca_dev->nframes) {
d43fa32f 1945 PDEBUG(D_FRAM,
63eb9546 1946 "qbuf idx %d >= %d", index, gspca_dev->nframes);
5b77ae77
JFM		 1947 ret = -EINVAL;
1948 goto out;
63eb9546 1949 }
5b77ae77 1950 if (v4l2_buf->memory != gspca_dev->memory) {
d43fa32f 1951 PDEBUG(D_FRAM, "qbuf bad memory type");
5b77ae77
JFM		 1952 ret = -EINVAL;
1953 goto out;
63eb9546 1954 }
e2997a72 1955
5b77ae77 1956 frame = &gspca_dev->frame[index];
d43fa32f
JFM		 1957 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1958 PDEBUG(D_FRAM, "qbuf bad state");
63eb9546
JFM		 1959 ret = -EINVAL;
1960 goto out;
1961 }
1962
1963 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
63eb9546 1964
d43fa32f 1965 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
63eb9546
JFM		 1966 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
1967 frame->v4l2_buf.length = v4l2_buf->length;
1968 }
1969
1970 /* put the buffer in the 'queued' queue */
f7059eaa 1971 i = atomic_read(&gspca_dev->fr_q);
63eb9546 1972 gspca_dev->fr_queue[i] = index;
f7059eaa 1973 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
63eb9546
JFM		 1974
1975 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
1976 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
1977 ret = 0;
1978out:
1979 mutex_unlock(&gspca_dev->queue_lock);
1980 return ret;
1981}
1982
d43fa32f
JFM		 1983/*
1984 * allocate the resources for read()
1985 */
1986static int read_alloc(struct gspca_dev *gspca_dev,
1987 struct file *file)
63eb9546 1988{
63eb9546 1989 struct v4l2_buffer v4l2_buf;
d43fa32f 1990 int i, ret;
63eb9546 1991
d43fa32f 1992 PDEBUG(D_STREAM, "read alloc");
63eb9546
JFM		 1993 if (gspca_dev->nframes == 0) {
1994 struct v4l2_requestbuffers rb;
1995
1996 memset(&rb, 0, sizeof rb);
1997 rb.count = gspca_dev->nbufread;
1998 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 1999 rb.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2000 ret = vidioc_reqbufs(file, gspca_dev, &rb);
2001 if (ret != 0) {
d43fa32f 2002 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
63eb9546
JFM		 2003 return ret;
2004 }
2005 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2006 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2007 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2008 for (i = 0; i < gspca_dev->nbufread; i++) {
2009 v4l2_buf.index = i;
63eb9546
JFM		 2010 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2011 if (ret != 0) {
2012 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
2013 return ret;
2014 }
2015 }
d43fa32f
JFM		 2016 gspca_dev->memory = GSPCA_MEMORY_READ;
2017 }
4aa0d037 2018
d43fa32f
JFM		 2019 /* start streaming */
2020 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
2021 if (ret != 0)
2022 PDEBUG(D_STREAM, "read streamon err %d", ret);
2023 return ret;
2024}
2025
2026static unsigned int dev_poll(struct file *file, poll_table *wait)
2027{
2028 struct gspca_dev *gspca_dev = file->private_data;
f7059eaa 2029 int ret;
d43fa32f
JFM		 2030
2031 PDEBUG(D_FRAM, "poll");
2032
2033 poll_wait(file, &gspca_dev->wq, wait);
d43fa32f 2034
5b77ae77
JFM		 2035 /* if reqbufs is not done, the user would use read() */
2036 if (gspca_dev->nframes == 0) {
2037 if (gspca_dev->memory != GSPCA_MEMORY_NO)
2038 return POLLERR; /* not the 1st time */
d43fa32f 2039 ret = read_alloc(gspca_dev, file);
5b77ae77
JFM		 2040 if (ret != 0)
2041 return POLLERR;
63eb9546
JFM		 2042 }
2043
d43fa32f
JFM		 2044 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
2045 return POLLERR;
d43fa32f 2046
f7059eaa
JFM		 2047 /* check if an image has been received */
2048 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
2049 ret = POLLIN | POLLRDNORM; /* yes */
d43fa32f
JFM		 2050 else
2051 ret = 0;
d43fa32f 2052 mutex_unlock(&gspca_dev->queue_lock);
090264e5
JFM		 2053 if (!gspca_dev->present)
2054 return POLLHUP;
d43fa32f
JFM		 2055 return ret;
2056}
2057
2058static ssize_t dev_read(struct file *file, char __user *data,
2059 size_t count, loff_t *ppos)
2060{
2061 struct gspca_dev *gspca_dev = file->private_data;
2062 struct gspca_frame *frame;
2063 struct v4l2_buffer v4l2_buf;
2064 struct timeval timestamp;
82643d0e 2065 int n, ret, ret2;
d43fa32f 2066
a9e11134 2067 PDEBUG(D_FRAM, "read (%zd)", count);
d43fa32f
JFM		 2068 if (!gspca_dev->present)
2069 return -ENODEV;
2070 switch (gspca_dev->memory) {
2071 case GSPCA_MEMORY_NO: /* first time */
2072 ret = read_alloc(gspca_dev, file);
2073 if (ret != 0)
2074 return ret;
2075 break;
2076 case GSPCA_MEMORY_READ:
82643d0e
JFM		 2077 if (gspca_dev->capt_file == file)
2078 break;
2079 /* fall thru */
d43fa32f
JFM		 2080 default:
2081 return -EINVAL;
2082 }
2083
63eb9546 2084 /* get a frame */
2f51d00f 2085 timestamp = ktime_to_timeval(ktime_get());
63eb9546 2086 timestamp.tv_sec--;
82643d0e
JFM		 2087 n = 2;
2088 for (;;) {
63eb9546
JFM		 2089 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2090 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2091 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2092 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2093 if (ret != 0) {
2094 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2095 return ret;
2096 }
2097
2098 /* if the process slept for more than 1 second,
219423c1 2099 * get a newer frame */
63eb9546 2100 frame = &gspca_dev->frame[v4l2_buf.index];
82643d0e
JFM		 2101 if (--n < 0)
2102 break; /* avoid infinite loop */
63eb9546
JFM		 2103 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2104 break;
2105 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2106 if (ret != 0) {
2107 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2108 return ret;
2109 }
2110 }
2111
2112 /* copy the frame */
ac0d6df6
JFM		 2113 if (count > frame->v4l2_buf.bytesused)
2114 count = frame->v4l2_buf.bytesused;
63eb9546
JFM		 2115 ret = copy_to_user(data, frame->data, count);
2116 if (ret != 0) {
2117 PDEBUG(D_ERR|D_STREAM,
a9e11134 2118 "read cp to user lack %d / %zd", ret, count);
63eb9546
JFM		 2119 ret = -EFAULT;
2120 goto out;
2121 }
2122 ret = count;
2123out:
2124 /* in each case, requeue the buffer */
2125 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2126 if (ret2 != 0)
2127 return ret2;
2128 return ret;
2129}
2130
bec43661 2131static struct v4l2_file_operations dev_fops = {
63eb9546
JFM		 2132 .owner = THIS_MODULE,
2133 .open = dev_open,
2134 .release = dev_close,
2135 .read = dev_read,
2136 .mmap = dev_mmap,
bec43661 2137 .unlocked_ioctl = video_ioctl2,
63eb9546
JFM		 2138 .poll = dev_poll,
2139};
2140
a399810c 2141static const struct v4l2_ioctl_ops dev_ioctl_ops = {
63eb9546
JFM		 2142 .vidioc_querycap = vidioc_querycap,
2143 .vidioc_dqbuf = vidioc_dqbuf,
2144 .vidioc_qbuf = vidioc_qbuf,
e078770a
MCC		 2145 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2146 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2147 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2148 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
63eb9546
JFM		 2149 .vidioc_streamon = vidioc_streamon,
2150 .vidioc_queryctrl = vidioc_queryctrl,
2151 .vidioc_g_ctrl = vidioc_g_ctrl,
2152 .vidioc_s_ctrl = vidioc_s_ctrl,
2153 .vidioc_querymenu = vidioc_querymenu,
2154 .vidioc_enum_input = vidioc_enum_input,
2155 .vidioc_g_input = vidioc_g_input,
2156 .vidioc_s_input = vidioc_s_input,
2157 .vidioc_reqbufs = vidioc_reqbufs,
2158 .vidioc_querybuf = vidioc_querybuf,
2159 .vidioc_streamoff = vidioc_streamoff,
2160 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2161 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2162 .vidioc_g_parm = vidioc_g_parm,
2163 .vidioc_s_parm = vidioc_s_parm,
11c635a2 2164 .vidioc_enum_framesizes = vidioc_enum_framesizes,
28ffe77f 2165 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
af1d9afa
BJ		 2166#ifdef CONFIG_VIDEO_ADV_DEBUG
2167 .vidioc_g_register = vidioc_g_register,
2168 .vidioc_s_register = vidioc_s_register,
2169#endif
2170 .vidioc_g_chip_ident = vidioc_g_chip_ident,
63eb9546
JFM		 2171};
2172
a399810c
HV		 2173static struct video_device gspca_template = {
2174 .name = "gspca main driver",
a399810c
HV		 2175 .fops = &dev_fops,
2176 .ioctl_ops = &dev_ioctl_ops,
d0182306 2177 .release = gspca_release,
a399810c
HV		 2178};
2179
6a33091f
JFM		 2180/* initialize the controls */
2181static void ctrls_init(struct gspca_dev *gspca_dev)
2182{
2183 struct gspca_ctrl *ctrl;
2184 int i;
2185
2186 for (i = 0, ctrl = gspca_dev->cam.ctrls;
2187 i < gspca_dev->sd_desc->nctrls;
2188 i++, ctrl++) {
2189 ctrl->def = gspca_dev->sd_desc->ctrls[i].qctrl.default_value;
2190 ctrl->val = ctrl->def;
2191 ctrl->min = gspca_dev->sd_desc->ctrls[i].qctrl.minimum;
2192 ctrl->max = gspca_dev->sd_desc->ctrls[i].qctrl.maximum;
2193 }
2194}
2195
63eb9546
JFM		 2196/*
2197 * probe and create a new gspca device
2198 *
2199 * This function must be called by the sub-driver when it is
2200 * called for probing a new device.
2201 */
4462864d 2202int gspca_dev_probe2(struct usb_interface *intf,
63eb9546
JFM		 2203 const struct usb_device_id *id,
2204 const struct sd_desc *sd_desc,
d43fa32f
JFM		 2205 int dev_size,
2206 struct module *module)
63eb9546 2207{
63eb9546
JFM		 2208 struct gspca_dev *gspca_dev;
2209 struct usb_device *dev = interface_to_usbdev(intf);
2210 int ret;
63eb9546 2211
6a7eba24 2212 PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
63eb9546 2213
63eb9546
JFM		 2214 /* create the device */
2215 if (dev_size < sizeof *gspca_dev)
2216 dev_size = sizeof *gspca_dev;
2217 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
e293e599 2218 if (!gspca_dev) {
63eb9546 2219 err("couldn't kzalloc gspca struct");
e293e599 2220 return -ENOMEM;
63eb9546 2221 }
8295d99e
JFM		 2222 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2223 if (!gspca_dev->usb_buf) {
2224 err("out of memory");
e293e599 2225 ret = -ENOMEM;
8295d99e
JFM		 2226 goto out;
2227 }
63eb9546 2228 gspca_dev->dev = dev;
4462864d 2229 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
d43fa32f 2230 gspca_dev->nbalt = intf->num_altsetting;
35680baa
JFM		 2231
2232 /* check if any audio device */
2233 if (dev->config->desc.bNumInterfaces != 1) {
2234 int i;
2235 struct usb_interface *intf2;
2236
2237 for (i = 0; i < dev->config->desc.bNumInterfaces; i++) {
2238 intf2 = dev->config->interface[i];
2239 if (intf2 != NULL
2240 && intf2->altsetting != NULL
2241 && intf2->altsetting->desc.bInterfaceClass ==
2242 USB_CLASS_AUDIO) {
2243 gspca_dev->audio = 1;
2244 break;
2245 }
2246 }
2247 }
2248
63eb9546 2249 gspca_dev->sd_desc = sd_desc;
63eb9546 2250 gspca_dev->nbufread = 2;
ff374747 2251 gspca_dev->empty_packet = -1; /* don't check the empty packets */
63eb9546 2252
012d6b02 2253 /* configure the subdriver and initialize the USB device */
ba38ee8e 2254 ret = sd_desc->config(gspca_dev, id);
012d6b02
JFM		 2255 if (ret < 0)
2256 goto out;
6a33091f
JFM		 2257 if (gspca_dev->cam.ctrls != NULL)
2258 ctrls_init(gspca_dev);
ba38ee8e 2259 ret = sd_desc->init(gspca_dev);
63eb9546
JFM		 2260 if (ret < 0)
2261 goto out;
2262 gspca_set_default_mode(gspca_dev);
2263
10ee2402
HG		 2264 ret = gspca_input_connect(gspca_dev);
2265 if (ret)
2266 goto out;
2267
63eb9546
JFM		 2268 mutex_init(&gspca_dev->usb_lock);
2269 mutex_init(&gspca_dev->read_lock);
2270 mutex_init(&gspca_dev->queue_lock);
2271 init_waitqueue_head(&gspca_dev->wq);
2272
2273 /* init video stuff */
ba38ee8e 2274 memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
24441631 2275 gspca_dev->vdev.parent = &intf->dev;
5c4fa002 2276 gspca_dev->module = module;
ee56a4d3 2277 gspca_dev->present = 1;
a12ca6a6 2278 ret = video_register_device(&gspca_dev->vdev,
63eb9546 2279 VFL_TYPE_GRABBER,
8d584a53 2280 -1);
63eb9546
JFM		 2281 if (ret < 0) {
2282 err("video_register_device err %d", ret);
2283 goto out;
2284 }
2285
63eb9546 2286 usb_set_intfdata(intf, gspca_dev);
38c7c036 2287 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
0274d42e 2288
10ee2402 2289 gspca_input_create_urb(gspca_dev);
0274d42e 2290
63eb9546
JFM		 2291 return 0;
2292out:
f7628015 2293#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
10ee2402
HG		 2294 if (gspca_dev->input_dev)
2295 input_unregister_device(gspca_dev->input_dev);
e7637521 2296#endif
e07a1d8a
JFM		 2297 kfree(gspca_dev->usb_buf);
2298 kfree(gspca_dev);
63eb9546
JFM		 2299 return ret;
2300}
4462864d
JFM		 2301EXPORT_SYMBOL(gspca_dev_probe2);
2302
2303/* same function as the previous one, but check the interface */
2304int gspca_dev_probe(struct usb_interface *intf,
2305 const struct usb_device_id *id,
2306 const struct sd_desc *sd_desc,
2307 int dev_size,
2308 struct module *module)
2309{
2310 struct usb_device *dev = interface_to_usbdev(intf);
2311
2312 /* we don't handle multi-config cameras */
2313 if (dev->descriptor.bNumConfigurations != 1) {
0b656321 2314 err("%04x:%04x too many config",
4462864d
JFM		 2315 id->idVendor, id->idProduct);
2316 return -ENODEV;
2317 }
2318
2319 /* the USB video interface must be the first one */
2320 if (dev->config->desc.bNumInterfaces != 1
c4dc692c 2321 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
4462864d 2322 return -ENODEV;
4462864d
JFM		 2323
2324 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
2325}
63eb9546
JFM		 2326EXPORT_SYMBOL(gspca_dev_probe);
2327
2328/*
2329 * USB disconnection
2330 *
2331 * This function must be called by the sub-driver
2332 * when the device disconnects, after the specific resources are freed.
2333 */
2334void gspca_disconnect(struct usb_interface *intf)
2335{
4aa0d037 2336 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
f7628015 2337#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e 2338 struct input_dev *input_dev;
e070bf9e 2339#endif
63eb9546 2340
38c7c036
LP		 2341 PDEBUG(D_PROBE, "%s disconnect",
2342 video_device_node_name(&gspca_dev->vdev));
ad28127d 2343 mutex_lock(&gspca_dev->usb_lock);
6e4ae872 2344 gspca_dev->present = 0;
6e4ae872 2345
090264e5
JFM		 2346 if (gspca_dev->streaming) {
2347 destroy_urbs(gspca_dev);
2348 wake_up_interruptible(&gspca_dev->wq);
2349 }
2350
f7628015 2351#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 2352 gspca_input_destroy_urb(gspca_dev);
2353 input_dev = gspca_dev->input_dev;
2354 if (input_dev) {
2355 gspca_dev->input_dev = NULL;
2356 input_unregister_device(input_dev);
2357 }
e070bf9e 2358#endif
0274d42e 2359
090264e5 2360 /* the device is freed at exit of this function */
ad28127d 2361 gspca_dev->dev = NULL;
090264e5
JFM		 2362 mutex_unlock(&gspca_dev->usb_lock);
2363
6b060ffe
FZ		 2364 usb_set_intfdata(intf, NULL);
2365
a12ca6a6
JFM		 2366 /* release the device */
2367 /* (this will call gspca_release() immediatly or on last close) */
2368 video_unregister_device(&gspca_dev->vdev);
3145b8c1 2369
0d07e240 2370/* PDEBUG(D_PROBE, "disconnect complete"); */
63eb9546
JFM		 2371}
2372EXPORT_SYMBOL(gspca_disconnect);
2373
6a709749
JFM		 2374#ifdef CONFIG_PM
2375int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2376{
2377 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2378
2379 if (!gspca_dev->streaming)
2380 return 0;
2381 gspca_dev->frozen = 1; /* avoid urb error messages */
012d6b02
JFM		 2382 if (gspca_dev->sd_desc->stopN)
2383 gspca_dev->sd_desc->stopN(gspca_dev);
6a709749 2384 destroy_urbs(gspca_dev);
0274d42e 2385 gspca_input_destroy_urb(gspca_dev);
6a709749 2386 gspca_set_alt0(gspca_dev);
012d6b02
JFM		 2387 if (gspca_dev->sd_desc->stop0)
2388 gspca_dev->sd_desc->stop0(gspca_dev);
6a709749
JFM		 2389 return 0;
2390}
2391EXPORT_SYMBOL(gspca_suspend);
2392
2393int gspca_resume(struct usb_interface *intf)
2394{
2395 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2396
2397 gspca_dev->frozen = 0;
012d6b02 2398 gspca_dev->sd_desc->init(gspca_dev);
0274d42e 2399 gspca_input_create_urb(gspca_dev);
012d6b02
JFM		 2400 if (gspca_dev->streaming)
2401 return gspca_init_transfer(gspca_dev);
1e89e2da 2402 return 0;
6a709749
JFM		 2403}
2404EXPORT_SYMBOL(gspca_resume);
2405#endif
dcef3237
HG		 2406/* -- cam driver utility functions -- */
2407
2408/* auto gain and exposure algorithm based on the knee algorithm described here:
2409 http://ytse.tricolour.net/docs/LowLightOptimization.html
2410
2411 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2412 where changed. */
2413int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2414 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2415{
2416 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2417 const struct ctrl *gain_ctrl = NULL;
2418 const struct ctrl *exposure_ctrl = NULL;
2419 const struct ctrl *autogain_ctrl = NULL;
2420 int retval = 0;
2421
2422 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
26984b09
HG		 2423 if (gspca_dev->ctrl_dis & (1 << i))
2424 continue;
dcef3237
HG		 2425 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2426 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2427 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2428 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2429 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2430 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2431 }
2432 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2433 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2434 "on cam without (auto)gain/exposure");
2435 return 0;
2436 }
2437
2438 if (gain_ctrl->get(gspca_dev, &gain) ||
2439 exposure_ctrl->get(gspca_dev, &exposure) ||
2440 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2441 return 0;
2442
2443 orig_gain = gain;
2444 orig_exposure = exposure;
2445
2446 /* If we are of a multiple of deadzone, do multiple steps to reach the
2447 desired lumination fast (with the risc of a slight overshoot) */
2448 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2449
1c44d81d 2450 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
dcef3237
HG		 2451 avg_lum, desired_avg_lum, steps);
2452
2453 for (i = 0; i < steps; i++) {
2454 if (avg_lum > desired_avg_lum) {
2455 if (gain > gain_knee)
2456 gain--;
2457 else if (exposure > exposure_knee)
2458 exposure--;
2459 else if (gain > gain_ctrl->qctrl.default_value)
2460 gain--;
2461 else if (exposure > exposure_ctrl->qctrl.minimum)
2462 exposure--;
2463 else if (gain > gain_ctrl->qctrl.minimum)
2464 gain--;
2465 else
2466 break;
2467 } else {
2468 if (gain < gain_ctrl->qctrl.default_value)
2469 gain++;
2470 else if (exposure < exposure_knee)
2471 exposure++;
2472 else if (gain < gain_knee)
2473 gain++;
2474 else if (exposure < exposure_ctrl->qctrl.maximum)
2475 exposure++;
2476 else if (gain < gain_ctrl->qctrl.maximum)
2477 gain++;
2478 else
2479 break;
2480 }
2481 }
2482
2483 if (gain != orig_gain) {
2484 gain_ctrl->set(gspca_dev, gain);
2485 retval = 1;
2486 }
2487 if (exposure != orig_exposure) {
2488 exposure_ctrl->set(gspca_dev, exposure);
2489 retval = 1;
2490 }
2491
2492 return retval;
2493}
2494EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2495
63eb9546
JFM		 2496/* -- module insert / remove -- */
2497static int __init gspca_init(void)
2498{
54826437 2499 info("v%d.%d.%d registered",
bb64e86c
JFM		 2500 (DRIVER_VERSION_NUMBER >> 16) & 0xff,
2501 (DRIVER_VERSION_NUMBER >> 8) & 0xff,
2502 DRIVER_VERSION_NUMBER & 0xff);
63eb9546
JFM		 2503 return 0;
2504}
2505static void __exit gspca_exit(void)
2506{
63eb9546
JFM		 2507}
2508
2509module_init(gspca_init);
2510module_exit(gspca_exit);
2511
335b3f88 2512#ifdef GSPCA_DEBUG
63eb9546
JFM		 2513module_param_named(debug, gspca_debug, int, 0644);
2514MODULE_PARM_DESC(debug,
2515 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
d43fa32f
JFM		 2516 " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout"
2517 " 0x0100: v4l2");
6a7eba24 2518#endif
Linux kernel - Deliverables
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