projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
[media] gspca: Fix locking issues related to suspend/resume
[deliverable/linux.git] / drivers / media / video / gspca / gspca.c
CommitLineData
63eb9546
JFM		 1/*
2 * Main USB camera driver
3 *
59929cef 4 * Copyright (C) 2008-2011 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
133a9fe9
JP		 24#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
f22123fa 26#define GSPCA_VERSION "2.14.0"
63eb9546
JFM		 27
28#include <linux/init.h>
29#include <linux/fs.h>
30#include <linux/vmalloc.h>
31#include <linux/sched.h>
32#include <linux/slab.h>
33#include <linux/mm.h>
34#include <linux/string.h>
35#include <linux/pagemap.h>
956e42d2 36#include <linux/io.h>
63eb9546 37#include <asm/page.h>
956e42d2 38#include <linux/uaccess.h>
2f51d00f 39#include <linux/ktime.h>
35ea11ff 40#include <media/v4l2-ioctl.h>
62bba5dd 41#include <media/v4l2-ctrls.h>
2333565d 42#include <media/v4l2-fh.h>
d57fb9f8 43#include <media/v4l2-event.h>
63eb9546
JFM		 44
45#include "gspca.h"
46
f7628015 47#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 48#include <linux/input.h>
49#include <linux/usb/input.h>
e070bf9e 50#endif
0274d42e 51
d43fa32f 52/* global values */
8fee8453
JFM		 53#define DEF_NURBS 3 /* default number of URBs */
54#if DEF_NURBS > MAX_NURBS
55#error "DEF_NURBS too big"
56#endif
d43fa32f 57
27c6f9e5 58MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
63eb9546
JFM		 59MODULE_DESCRIPTION("GSPCA USB Camera Driver");
60MODULE_LICENSE("GPL");
f22123fa 61MODULE_VERSION(GSPCA_VERSION);
63eb9546 62
335b3f88 63#ifdef GSPCA_DEBUG
63eb9546
JFM		 64int gspca_debug = D_ERR | D_PROBE;
65EXPORT_SYMBOL(gspca_debug);
66
67static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h)
68{
69 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
70 PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d",
71 txt,
72 pixfmt & 0xff,
73 (pixfmt >> 8) & 0xff,
74 (pixfmt >> 16) & 0xff,
75 pixfmt >> 24,
76 w, h);
77 } else {
78 PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d",
79 txt,
80 pixfmt,
81 w, h);
82 }
83}
84#else
85#define PDEBUG_MODE(txt, pixfmt, w, h)
86#endif
87
77ee3318 88/* specific memory types - !! should be different from V4L2_MEMORY_xxx */
d43fa32f
JFM		 89#define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
90#define GSPCA_MEMORY_READ 7
91
d43fa32f 92#define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
d43fa32f 93
63eb9546
JFM		 94/*
95 * VMA operations.
96 */
97static void gspca_vm_open(struct vm_area_struct *vma)
98{
99 struct gspca_frame *frame = vma->vm_private_data;
100
101 frame->vma_use_count++;
102 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
103}
104
105static void gspca_vm_close(struct vm_area_struct *vma)
106{
107 struct gspca_frame *frame = vma->vm_private_data;
108
109 if (--frame->vma_use_count <= 0)
110 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
111}
112
f0f37e2f 113static const struct vm_operations_struct gspca_vm_ops = {
63eb9546
JFM		 114 .open = gspca_vm_open,
115 .close = gspca_vm_close,
116};
117
0274d42e
MN		 118/*
119 * Input and interrupt endpoint handling functions
120 */
f7628015 121#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 122static void int_irq(struct urb *urb)
123{
124 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
125 int ret;
126
127 ret = urb->status;
128 switch (ret) {
129 case 0:
130 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
131 urb->transfer_buffer, urb->actual_length) < 0) {
132 PDEBUG(D_ERR, "Unknown packet received");
133 }
134 break;
135
136 case -ENOENT:
137 case -ECONNRESET:
138 case -ENODEV:
139 case -ESHUTDOWN:
140 /* Stop is requested either by software or hardware is gone,
141 * keep the ret value non-zero and don't resubmit later.
142 */
143 break;
144
145 default:
146 PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status);
147 urb->status = 0;
148 ret = 0;
149 }
150
151 if (ret == 0) {
152 ret = usb_submit_urb(urb, GFP_ATOMIC);
153 if (ret < 0)
133a9fe9 154 pr_err("Resubmit URB failed with error %i\n", ret);
0274d42e
MN		 155 }
156}
157
158static int gspca_input_connect(struct gspca_dev *dev)
159{
160 struct input_dev *input_dev;
161 int err = 0;
162
163 dev->input_dev = NULL;
ac82f59f 164 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
0274d42e
MN		 165 input_dev = input_allocate_device();
166 if (!input_dev)
167 return -ENOMEM;
168
169 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
170 strlcat(dev->phys, "/input0", sizeof(dev->phys));
171
172 input_dev->name = dev->sd_desc->name;
173 input_dev->phys = dev->phys;
174
175 usb_to_input_id(dev->dev, &input_dev->id);
176
177 input_dev->evbit[0] = BIT_MASK(EV_KEY);
178 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
179 input_dev->dev.parent = &dev->dev->dev;
180
181 err = input_register_device(input_dev);
182 if (err) {
133a9fe9
JP		 183 pr_err("Input device registration failed with error %i\n",
184 err);
0274d42e
MN		 185 input_dev->dev.parent = NULL;
186 input_free_device(input_dev);
187 } else {
188 dev->input_dev = input_dev;
189 }
10ee2402 190 }
0274d42e
MN		 191
192 return err;
193}
194
195static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
196 struct usb_endpoint_descriptor *ep)
197{
198 unsigned int buffer_len;
199 int interval;
200 struct urb *urb;
201 struct usb_device *dev;
202 void *buffer = NULL;
203 int ret = -EINVAL;
204
b26d6e21 205 buffer_len = le16_to_cpu(ep->wMaxPacketSize);
0274d42e 206 interval = ep->bInterval;
c4dc692c 207 PDEBUG(D_CONF, "found int in endpoint: 0x%x, "
0274d42e
MN		 208 "buffer_len=%u, interval=%u",
209 ep->bEndpointAddress, buffer_len, interval);
210
211 dev = gspca_dev->dev;
212
213 urb = usb_alloc_urb(0, GFP_KERNEL);
214 if (!urb) {
215 ret = -ENOMEM;
216 goto error;
217 }
218
7a9b1492 219 buffer = usb_alloc_coherent(dev, buffer_len,
0274d42e
MN		 220 GFP_KERNEL, &urb->transfer_dma);
221 if (!buffer) {
222 ret = -ENOMEM;
223 goto error_buffer;
224 }
225 usb_fill_int_urb(urb, dev,
226 usb_rcvintpipe(dev, ep->bEndpointAddress),
227 buffer, buffer_len,
228 int_irq, (void *)gspca_dev, interval);
882787ff 229 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
0274d42e
MN		 230 ret = usb_submit_urb(urb, GFP_KERNEL);
231 if (ret < 0) {
c4dc692c 232 PDEBUG(D_ERR, "submit int URB failed with error %i", ret);
0274d42e
MN		 233 goto error_submit;
234 }
2661da47 235 gspca_dev->int_urb = urb;
0274d42e
MN		 236 return ret;
237
238error_submit:
997ea58e
DM		 239 usb_free_coherent(dev,
240 urb->transfer_buffer_length,
241 urb->transfer_buffer,
242 urb->transfer_dma);
0274d42e
MN		 243error_buffer:
244 usb_free_urb(urb);
245error:
246 return ret;
247}
248
10ee2402 249static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
0274d42e 250{
0274d42e
MN		 251 struct usb_interface *intf;
252 struct usb_host_interface *intf_desc;
253 struct usb_endpoint_descriptor *ep;
254 int i;
255
256 if (gspca_dev->sd_desc->int_pkt_scan) {
257 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
258 intf_desc = intf->cur_altsetting;
259 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
260 ep = &intf_desc->endpoint[i].desc;
261 if (usb_endpoint_dir_in(ep) &&
262 usb_endpoint_xfer_int(ep)) {
263
10ee2402 264 alloc_and_submit_int_urb(gspca_dev, ep);
0274d42e
MN		 265 break;
266 }
267 }
268 }
0274d42e
MN		 269}
270
271static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
272{
273 struct urb *urb;
274
275 urb = gspca_dev->int_urb;
276 if (urb) {
277 gspca_dev->int_urb = NULL;
278 usb_kill_urb(urb);
997ea58e
DM		 279 usb_free_coherent(gspca_dev->dev,
280 urb->transfer_buffer_length,
281 urb->transfer_buffer,
282 urb->transfer_dma);
0274d42e
MN		 283 usb_free_urb(urb);
284 }
285}
f7628015
RD		 286#else
287static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
288{
289}
290
291static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
292{
293}
294
295static inline int gspca_input_connect(struct gspca_dev *dev)
296{
297 return 0;
298}
0274d42e
MN		 299#endif
300
63eb9546 301/*
d43fa32f 302 * fill a video frame from an URB and resubmit
63eb9546 303 */
d43fa32f
JFM		 304static void fill_frame(struct gspca_dev *gspca_dev,
305 struct urb *urb)
63eb9546 306{
8d584a53 307 u8 *data; /* address of data in the iso message */
1b60e1ad 308 int i, len, st;
63eb9546
JFM		 309 cam_pkt_op pkt_scan;
310
6a7eba24 311 if (urb->status != 0) {
090264e5
JFM		 312 if (urb->status == -ESHUTDOWN)
313 return; /* disconnection */
62ee8eee 314#ifdef CONFIG_PM
6a540bdf
HG		 315 if (gspca_dev->frozen)
316 return;
62ee8eee 317#endif
6a540bdf 318 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
8157852f 319 urb->status = 0;
bf926adf 320 goto resubmit;
6a7eba24 321 }
63eb9546
JFM		 322 pkt_scan = gspca_dev->sd_desc->pkt_scan;
323 for (i = 0; i < urb->number_of_packets; i++) {
95f18be2 324 len = urb->iso_frame_desc[i].actual_length;
63eb9546 325
63eb9546 326 /* check the packet status and length */
63eb9546
JFM		 327 st = urb->iso_frame_desc[i].status;
328 if (st) {
133a9fe9
JP		 329 pr_err("ISOC data error: [%d] len=%d, status=%d\n",
330 i, len, st);
63eb9546
JFM		 331 gspca_dev->last_packet_type = DISCARD_PACKET;
332 continue;
333 }
76ebc16b
JFM		 334 if (len == 0) {
335 if (gspca_dev->empty_packet == 0)
336 gspca_dev->empty_packet = 1;
337 continue;
338 }
63eb9546
JFM		 339
340 /* let the packet be analyzed by the subdriver */
341 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
342 i, urb->iso_frame_desc[i].offset, len);
8d584a53 343 data = (u8 *) urb->transfer_buffer
63eb9546 344 + urb->iso_frame_desc[i].offset;
76dd272b 345 pkt_scan(gspca_dev, data, len);
63eb9546
JFM		 346 }
347
bf926adf 348resubmit:
63eb9546 349 /* resubmit the URB */
63eb9546
JFM		 350 st = usb_submit_urb(urb, GFP_ATOMIC);
351 if (st < 0)
133a9fe9 352 pr_err("usb_submit_urb() ret %d\n", st);
63eb9546
JFM		 353}
354
d43fa32f
JFM		 355/*
356 * ISOC message interrupt from the USB device
357 *
ac0d6df6 358 * Analyse each packet and call the subdriver for copy to the frame buffer.
d43fa32f 359 */
8d584a53 360static void isoc_irq(struct urb *urb)
d43fa32f
JFM		 361{
362 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
363
3647fea8 364 PDEBUG(D_PACK, "isoc irq");
d43fa32f
JFM		 365 if (!gspca_dev->streaming)
366 return;
367 fill_frame(gspca_dev, urb);
368}
369
0be01004
JFM		 370/*
371 * bulk message interrupt from the USB device
372 */
8d584a53 373static void bulk_irq(struct urb *urb)
0be01004
JFM		 374{
375 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
dff369aa 376 int st;
0be01004
JFM		 377
378 PDEBUG(D_PACK, "bulk irq");
379 if (!gspca_dev->streaming)
380 return;
880ae24d
JFM		 381 switch (urb->status) {
382 case 0:
383 break;
090264e5
JFM		 384 case -ESHUTDOWN:
385 return; /* disconnection */
880ae24d 386 default:
0be01004 387#ifdef CONFIG_PM
6a540bdf
HG		 388 if (gspca_dev->frozen)
389 return;
0be01004 390#endif
6a540bdf 391 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
8157852f 392 urb->status = 0;
bf926adf 393 goto resubmit;
0be01004
JFM		 394 }
395
d131c3c9
JFM		 396 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
397 gspca_dev->sd_desc->pkt_scan(gspca_dev,
d131c3c9
JFM		 398 urb->transfer_buffer,
399 urb->actual_length);
dff369aa 400
bf926adf 401resubmit:
dff369aa
AO		 402 /* resubmit the URB */
403 if (gspca_dev->cam.bulk_nurbs != 0) {
404 st = usb_submit_urb(urb, GFP_ATOMIC);
405 if (st < 0)
133a9fe9 406 pr_err("usb_submit_urb() ret %d\n", st);
dff369aa 407 }
0be01004
JFM		 408}
409
63eb9546
JFM		 410/*
411 * add data to the current frame
412 *
ac0d6df6
JFM		 413 * This function is called by the subdrivers at interrupt level.
414 *
63eb9546
JFM		 415 * To build a frame, these ones must add
416 * - one FIRST_PACKET
417 * - 0 or many INTER_PACKETs
418 * - one LAST_PACKET
419 * DISCARD_PACKET invalidates the whole frame.
63eb9546 420 */
76dd272b
JFM		 421void gspca_frame_add(struct gspca_dev *gspca_dev,
422 enum gspca_packet_type packet_type,
423 const u8 *data,
424 int len)
63eb9546 425{
3ec342f2 426 struct gspca_frame *frame;
63eb9546
JFM		 427 int i, j;
428
e2997a72 429 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
d131c3c9 430
63eb9546 431 if (packet_type == FIRST_PACKET) {
f7059eaa
JFM		 432 i = atomic_read(&gspca_dev->fr_i);
433
434 /* if there are no queued buffer, discard the whole frame */
435 if (i == atomic_read(&gspca_dev->fr_q)) {
436 gspca_dev->last_packet_type = DISCARD_PACKET;
2e0544a8 437 gspca_dev->sequence++;
f7059eaa
JFM		 438 return;
439 }
b192ca98
JFM		 440 j = gspca_dev->fr_queue[i];
441 frame = &gspca_dev->frame[j];
2f51d00f 442 frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
2e0544a8 443 frame->v4l2_buf.sequence = gspca_dev->sequence++;
f7059eaa 444 gspca_dev->image = frame->data;
b192ca98 445 gspca_dev->image_len = 0;
fe988f56
JFM		 446 } else {
447 switch (gspca_dev->last_packet_type) {
448 case DISCARD_PACKET:
fa4376d2 449 if (packet_type == LAST_PACKET) {
fe988f56 450 gspca_dev->last_packet_type = packet_type;
fa4376d2
HG		 451 gspca_dev->image = NULL;
452 gspca_dev->image_len = 0;
453 }
fe988f56
JFM		 454 return;
455 case LAST_PACKET:
456 return;
457 }
d43fa32f 458 }
63eb9546 459
d43fa32f 460 /* append the packet to the frame buffer */
63eb9546 461 if (len > 0) {
b192ca98
JFM		 462 if (gspca_dev->image_len + len > gspca_dev->frsz) {
463 PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d",
464 gspca_dev->image_len + len,
465 gspca_dev->frsz);
63eb9546
JFM		 466 packet_type = DISCARD_PACKET;
467 } else {
fe988f56
JFM		 468/* !! image is NULL only when last pkt is LAST or DISCARD
469 if (gspca_dev->image == NULL) {
133a9fe9 470 pr_err("gspca_frame_add() image == NULL\n");
fe988f56
JFM		 471 return;
472 }
473 */
b192ca98
JFM		 474 memcpy(gspca_dev->image + gspca_dev->image_len,
475 data, len);
476 gspca_dev->image_len += len;
63eb9546
JFM		 477 }
478 }
479 gspca_dev->last_packet_type = packet_type;
480
f7059eaa
JFM		 481 /* if last packet, invalidate packet concatenation until
482 * next first packet, wake up the application and advance
483 * in the queue */
63eb9546 484 if (packet_type == LAST_PACKET) {
f7059eaa 485 i = atomic_read(&gspca_dev->fr_i);
b192ca98
JFM		 486 j = gspca_dev->fr_queue[i];
487 frame = &gspca_dev->frame[j];
488 frame->v4l2_buf.bytesused = gspca_dev->image_len;
02bbcb9d
JFM		 489 frame->v4l2_buf.flags = (frame->v4l2_buf.flags
490 | V4L2_BUF_FLAG_DONE)
491 & ~V4L2_BUF_FLAG_QUEUED;
f7059eaa
JFM		 492 i = (i + 1) % GSPCA_MAX_FRAMES;
493 atomic_set(&gspca_dev->fr_i, i);
63eb9546 494 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
f7059eaa
JFM		 495 PDEBUG(D_FRAM, "frame complete len:%d",
496 frame->v4l2_buf.bytesused);
497 gspca_dev->image = NULL;
498 gspca_dev->image_len = 0;
63eb9546 499 }
63eb9546
JFM		 500}
501EXPORT_SYMBOL(gspca_frame_add);
502
d642de2e
HG		 503static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file,
504 enum v4l2_memory memory, unsigned int count)
63eb9546 505{
d43fa32f
JFM		 506 struct gspca_frame *frame;
507 unsigned int frsz;
508 int i;
63eb9546 509
c2446b3e
JFM		 510 i = gspca_dev->curr_mode;
511 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
63eb9546 512 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
63eb9546 513 frsz = PAGE_ALIGN(frsz);
f7059eaa
JFM		 514 if (count >= GSPCA_MAX_FRAMES)
515 count = GSPCA_MAX_FRAMES - 1;
e795d912 516 gspca_dev->frbuf = vmalloc_32(frsz * count);
ac0d6df6 517 if (!gspca_dev->frbuf) {
133a9fe9 518 pr_err("frame alloc failed\n");
ac0d6df6 519 return -ENOMEM;
63eb9546 520 }
d642de2e
HG		 521 gspca_dev->capt_file = file;
522 gspca_dev->memory = memory;
523 gspca_dev->frsz = frsz;
63eb9546
JFM		 524 gspca_dev->nframes = count;
525 for (i = 0; i < count; i++) {
d43fa32f
JFM		 526 frame = &gspca_dev->frame[i];
527 frame->v4l2_buf.index = i;
528 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
529 frame->v4l2_buf.flags = 0;
530 frame->v4l2_buf.field = V4L2_FIELD_NONE;
531 frame->v4l2_buf.length = frsz;
d642de2e 532 frame->v4l2_buf.memory = memory;
d43fa32f 533 frame->v4l2_buf.sequence = 0;
b192ca98 534 frame->data = gspca_dev->frbuf + i * frsz;
ac0d6df6 535 frame->v4l2_buf.m.offset = i * frsz;
63eb9546 536 }
f7059eaa
JFM		 537 atomic_set(&gspca_dev->fr_q, 0);
538 atomic_set(&gspca_dev->fr_i, 0);
539 gspca_dev->fr_o = 0;
d43fa32f 540 return 0;
63eb9546
JFM		 541}
542
543static void frame_free(struct gspca_dev *gspca_dev)
544{
545 int i;
546
547 PDEBUG(D_STREAM, "frame free");
efab8211 548 if (gspca_dev->frbuf != NULL) {
e795d912 549 vfree(gspca_dev->frbuf);
63eb9546
JFM		 550 gspca_dev->frbuf = NULL;
551 for (i = 0; i < gspca_dev->nframes; i++)
552 gspca_dev->frame[i].data = NULL;
553 }
554 gspca_dev->nframes = 0;
d642de2e
HG		 555 gspca_dev->frsz = 0;
556 gspca_dev->capt_file = NULL;
557 gspca_dev->memory = GSPCA_MEMORY_NO;
63eb9546
JFM		 558}
559
d43fa32f 560static void destroy_urbs(struct gspca_dev *gspca_dev)
63eb9546
JFM		 561{
562 struct urb *urb;
563 unsigned int i;
564
565 PDEBUG(D_STREAM, "kill transfer");
44732819 566 for (i = 0; i < MAX_NURBS; i++) {
4aa0d037 567 urb = gspca_dev->urb[i];
63eb9546 568 if (urb == NULL)
d43fa32f 569 break;
63eb9546 570
4aa0d037 571 gspca_dev->urb[i] = NULL;
090264e5 572 usb_kill_urb(urb);
efab8211 573 if (urb->transfer_buffer != NULL)
997ea58e
DM		 574 usb_free_coherent(gspca_dev->dev,
575 urb->transfer_buffer_length,
576 urb->transfer_buffer,
577 urb->transfer_dma);
63eb9546
JFM		 578 usb_free_urb(urb);
579 }
63eb9546
JFM		 580}
581
e4dac289
JFM		 582static int gspca_set_alt0(struct gspca_dev *gspca_dev)
583{
584 int ret;
585
586 if (gspca_dev->alt == 0)
587 return 0;
588 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
589 if (ret < 0)
133a9fe9 590 pr_err("set alt 0 err %d\n", ret);
e4dac289
JFM		 591 return ret;
592}
593
594/* Note: both the queue and the usb locks should be held when calling this */
595static void gspca_stream_off(struct gspca_dev *gspca_dev)
596{
597 gspca_dev->streaming = 0;
598 if (gspca_dev->present) {
599 if (gspca_dev->sd_desc->stopN)
600 gspca_dev->sd_desc->stopN(gspca_dev);
601 destroy_urbs(gspca_dev);
602 gspca_input_destroy_urb(gspca_dev);
603 gspca_set_alt0(gspca_dev);
604 gspca_input_create_urb(gspca_dev);
605 }
606
607 /* always call stop0 to free the subdriver's resources */
608 if (gspca_dev->sd_desc->stop0)
609 gspca_dev->sd_desc->stop0(gspca_dev);
610 PDEBUG(D_STREAM, "stream off OK");
611}
612
63eb9546 613/*
219423c1 614 * look for an input transfer endpoint in an alternate setting
63eb9546 615 */
0be01004 616static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
6929dc6b 617 int xfer)
63eb9546
JFM		 618{
619 struct usb_host_endpoint *ep;
620 int i, attr;
621
63eb9546
JFM		 622 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
623 ep = &alt->endpoint[i];
50e06dee 624 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
30d35e49 625 if (attr == xfer
7106225a
PC		 626 && ep->desc.wMaxPacketSize != 0
627 && usb_endpoint_dir_in(&ep->desc))
50e06dee 628 return ep;
63eb9546
JFM		 629 }
630 return NULL;
631}
632
27b12023
JFM		 633/* compute the minimum bandwidth for the current transfer */
634static u32 which_bandwidth(struct gspca_dev *gspca_dev)
635{
636 u32 bandwidth;
637 int i;
638
18bef42c 639 /* get the (max) image size */
27b12023
JFM		 640 i = gspca_dev->curr_mode;
641 bandwidth = gspca_dev->cam.cam_mode[i].sizeimage;
642
18bef42c 643 /* if the image is compressed, estimate its mean size */
eb3fb7c9
HG		 644 if (!gspca_dev->cam.needs_full_bandwidth &&
645 bandwidth < gspca_dev->cam.cam_mode[i].width *
27b12023 646 gspca_dev->cam.cam_mode[i].height)
18bef42c 647 bandwidth = bandwidth * 3 / 8; /* 0.375 */
27b12023
JFM		 648
649 /* estimate the frame rate */
650 if (gspca_dev->sd_desc->get_streamparm) {
651 struct v4l2_streamparm parm;
652
27b12023
JFM		 653 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
654 bandwidth *= parm.parm.capture.timeperframe.denominator;
1153f04d 655 bandwidth /= parm.parm.capture.timeperframe.numerator;
27b12023 656 } else {
18bef42c
JFM		 657
658 /* don't hope more than 15 fps with USB 1.1 and
659 * image resolution >= 640x480 */
660 if (gspca_dev->width >= 640
661 && gspca_dev->dev->speed == USB_SPEED_FULL)
662 bandwidth *= 15; /* 15 fps */
663 else
664 bandwidth *= 30; /* 30 fps */
27b12023
JFM		 665 }
666
667 PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth);
668 return bandwidth;
669}
670
671/* endpoint table */
672#define MAX_ALT 16
673struct ep_tb_s {
674 u32 alt;
675 u32 bandwidth;
676};
677
63eb9546 678/*
27b12023
JFM		 679 * build the table of the endpoints
680 * and compute the minimum bandwidth for the image transfer
63eb9546 681 */
66957b86 682static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
27b12023 683 struct usb_interface *intf,
27b12023 684 struct ep_tb_s *ep_tb)
63eb9546 685{
63eb9546 686 struct usb_host_endpoint *ep;
27b12023
JFM		 687 int i, j, nbalt, psize, found;
688 u32 bandwidth, last_bw;
63eb9546 689
27b12023
JFM		 690 nbalt = intf->num_altsetting;
691 if (nbalt > MAX_ALT)
692 nbalt = MAX_ALT; /* fixme: should warn */
693
694 /* build the endpoint table */
695 i = 0;
696 last_bw = 0;
697 for (;;) {
698 ep_tb->bandwidth = 2000 * 2000 * 120;
699 found = 0;
700 for (j = 0; j < nbalt; j++) {
66957b86
HG		 701 ep = alt_xfer(&intf->altsetting[j],
702 USB_ENDPOINT_XFER_ISOC);
27b12023
JFM		 703 if (ep == NULL)
704 continue;
d0d3435b
HG		 705 if (ep->desc.bInterval == 0) {
706 pr_err("alt %d iso endp with 0 interval\n", j);
707 continue;
708 }
27b12023 709 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
66957b86 710 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
d0d3435b 711 bandwidth = psize * 1000;
27b12023
JFM		 712 if (gspca_dev->dev->speed == USB_SPEED_HIGH
713 || gspca_dev->dev->speed == USB_SPEED_SUPER)
714 bandwidth *= 8;
d0d3435b 715 bandwidth /= 1 << (ep->desc.bInterval - 1);
27b12023
JFM		 716 if (bandwidth <= last_bw)
717 continue;
718 if (bandwidth < ep_tb->bandwidth) {
719 ep_tb->bandwidth = bandwidth;
720 ep_tb->alt = j;
721 found = 1;
722 }
95d9142c 723 }
27b12023
JFM		 724 if (!found)
725 break;
726 PDEBUG(D_STREAM, "alt %d bandwidth %d",
727 ep_tb->alt, ep_tb->bandwidth);
728 last_bw = ep_tb->bandwidth;
729 i++;
730 ep_tb++;
731 }
732
2d39059a
HG		 733 /*
734 * If the camera:
735 * has a usb audio class interface (a built in usb mic); and
736 * is a usb 1 full speed device; and
737 * uses the max full speed iso bandwidth; and
738 * and has more than 1 alt setting
739 * then skip the highest alt setting to spare bandwidth for the mic
740 */
741 if (gspca_dev->audio &&
742 gspca_dev->dev->speed == USB_SPEED_FULL &&
743 last_bw >= 1000000 &&
744 i > 1) {
745 PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt");
746 i--;
747 ep_tb--;
748 }
749
27b12023
JFM		 750 /* get the requested bandwidth and start at the highest atlsetting */
751 bandwidth = which_bandwidth(gspca_dev);
752 ep_tb--;
753 while (i > 1) {
754 ep_tb--;
755 if (ep_tb->bandwidth < bandwidth)
756 break;
757 i--;
63eb9546 758 }
27b12023 759 return i;
63eb9546
JFM		 760}
761
762/*
0be01004 763 * create the URBs for image transfer
63eb9546
JFM		 764 */
765static int create_urbs(struct gspca_dev *gspca_dev,
766 struct usb_host_endpoint *ep)
767{
768 struct urb *urb;
d43fa32f 769 int n, nurbs, i, psize, npkt, bsize;
63eb9546
JFM		 770
771 /* calculate the packet size and the number of packets */
63eb9546 772 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
d43fa32f 773
6929dc6b 774 if (!gspca_dev->cam.bulk) { /* isoc */
95d9142c
JFM		 775
776 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
1f53b0b0
JFM		 777 if (gspca_dev->pkt_size == 0)
778 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
779 else
780 psize = gspca_dev->pkt_size;
49cb6b04
JFM		 781 npkt = gspca_dev->cam.npkt;
782 if (npkt == 0)
783 npkt = 32; /* default value */
0be01004
JFM		 784 bsize = psize * npkt;
785 PDEBUG(D_STREAM,
786 "isoc %d pkts size %d = bsize:%d",
787 npkt, psize, bsize);
51977a8d 788 nurbs = DEF_NURBS;
95d9142c 789 } else { /* bulk */
0be01004 790 npkt = 0;
dff369aa 791 bsize = gspca_dev->cam.bulk_size;
95d9142c
JFM		 792 if (bsize == 0)
793 bsize = psize;
0be01004 794 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
dff369aa
AO		 795 if (gspca_dev->cam.bulk_nurbs != 0)
796 nurbs = gspca_dev->cam.bulk_nurbs;
797 else
798 nurbs = 1;
0be01004
JFM		 799 }
800
d43fa32f 801 for (n = 0; n < nurbs; n++) {
63eb9546
JFM		 802 urb = usb_alloc_urb(npkt, GFP_KERNEL);
803 if (!urb) {
133a9fe9 804 pr_err("usb_alloc_urb failed\n");
63eb9546
JFM		 805 return -ENOMEM;
806 }
db870875 807 gspca_dev->urb[n] = urb;
997ea58e 808 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
63eb9546
JFM		 809 bsize,
810 GFP_KERNEL,
811 &urb->transfer_dma);
812
4aa0d037 813 if (urb->transfer_buffer == NULL) {
133a9fe9 814 pr_err("usb_alloc_coherent failed\n");
63eb9546
JFM		 815 return -ENOMEM;
816 }
63eb9546
JFM		 817 urb->dev = gspca_dev->dev;
818 urb->context = gspca_dev;
63eb9546 819 urb->transfer_buffer_length = bsize;
0be01004
JFM		 820 if (npkt != 0) { /* ISOC */
821 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
822 ep->desc.bEndpointAddress);
6c49da7f
FZ		 823 urb->transfer_flags = URB_ISO_ASAP
824 | URB_NO_TRANSFER_DMA_MAP;
51e23be2 825 urb->interval = 1 << (ep->desc.bInterval - 1);
0be01004
JFM		 826 urb->complete = isoc_irq;
827 urb->number_of_packets = npkt;
828 for (i = 0; i < npkt; i++) {
829 urb->iso_frame_desc[i].length = psize;
830 urb->iso_frame_desc[i].offset = psize * i;
831 }
832 } else { /* bulk */
833 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
a23c1947 834 ep->desc.bEndpointAddress);
6c49da7f 835 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
0be01004 836 urb->complete = bulk_irq;
63eb9546
JFM		 837 }
838 }
839 return 0;
840}
841
842/*
843 * start the USB transfer
844 */
845static int gspca_init_transfer(struct gspca_dev *gspca_dev)
846{
27b12023 847 struct usb_interface *intf;
63eb9546 848 struct usb_host_endpoint *ep;
db870875 849 struct urb *urb;
27b12023
JFM		 850 struct ep_tb_s ep_tb[MAX_ALT];
851 int n, ret, xfer, alt, alt_idx;
63eb9546 852
e2997a72
HG		 853 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
854 return -ERESTARTSYS;
63eb9546 855
090264e5
JFM		 856 if (!gspca_dev->present) {
857 ret = -ENODEV;
314b3e08 858 goto unlock;
090264e5
JFM		 859 }
860
f7059eaa
JFM		 861 /* reset the streaming variables */
862 gspca_dev->image = NULL;
863 gspca_dev->image_len = 0;
864 gspca_dev->last_packet_type = DISCARD_PACKET;
865 gspca_dev->sequence = 0;
866
ab6c8cf2
JFM		 867 gspca_dev->usb_err = 0;
868
27b12023 869 /* do the specific subdriver stuff before endpoint selection */
47faa6f8
HG		 870 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
871 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
1f53b0b0
JFM		 872 if (gspca_dev->sd_desc->isoc_init) {
873 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
874 if (ret < 0)
314b3e08 875 goto unlock;
1f53b0b0 876 }
27b12023
JFM		 877 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
878 : USB_ENDPOINT_XFER_ISOC;
314b3e08 879
66957b86 880 /* if bulk or the subdriver forced an altsetting, get the endpoint */
27b12023
JFM		 881 if (gspca_dev->alt != 0) {
882 gspca_dev->alt--; /* (previous version compatibility) */
883 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer);
884 if (ep == NULL) {
885 pr_err("bad altsetting %d\n", gspca_dev->alt);
886 ret = -EIO;
887 goto out;
888 }
889 ep_tb[0].alt = gspca_dev->alt;
890 alt_idx = 1;
891 } else {
892
893 /* else, compute the minimum bandwidth
894 * and build the endpoint table */
66957b86 895 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
27b12023
JFM		 896 if (alt_idx <= 0) {
897 pr_err("no transfer endpoint found\n");
898 ret = -EIO;
899 goto unlock;
900 }
1f53b0b0 901 }
27b12023
JFM		 902
903 /* set the highest alternate setting and
904 * loop until urb submit succeeds */
905 gspca_input_destroy_urb(gspca_dev);
906
907 gspca_dev->alt = ep_tb[--alt_idx].alt;
908 alt = -1;
63eb9546 909 for (;;) {
27b12023
JFM		 910 if (alt != gspca_dev->alt) {
911 alt = gspca_dev->alt;
6121ca57 912 if (intf->num_altsetting > 1) {
27b12023
JFM		 913 ret = usb_set_interface(gspca_dev->dev,
914 gspca_dev->iface,
915 alt);
916 if (ret < 0) {
4274d84c
JFM		 917 if (ret == -ENOSPC)
918 goto retry; /*fixme: ugly*/
27b12023
JFM		 919 pr_err("set alt %d err %d\n", alt, ret);
920 goto out;
921 }
922 }
923 }
47aaca96 924 if (!gspca_dev->cam.no_urb_create) {
27b12023
JFM		 925 PDEBUG(D_STREAM, "init transfer alt %d", alt);
926 ret = create_urbs(gspca_dev,
927 alt_xfer(&intf->altsetting[alt], xfer));
47aaca96
JFM		 928 if (ret < 0) {
929 destroy_urbs(gspca_dev);
930 goto out;
931 }
db870875 932 }
63eb9546 933
8fe2f1d5 934 /* clear the bulk endpoint */
6929dc6b 935 if (gspca_dev->cam.bulk)
8fe2f1d5 936 usb_clear_halt(gspca_dev->dev,
50e06dee 937 gspca_dev->urb[0]->pipe);
8fe2f1d5 938
63eb9546 939 /* start the cam */
72ab97ce
JFM		 940 ret = gspca_dev->sd_desc->start(gspca_dev);
941 if (ret < 0) {
942 destroy_urbs(gspca_dev);
943 goto out;
944 }
63eb9546 945 gspca_dev->streaming = 1;
63eb9546 946
dff369aa 947 /* some bulk transfers are started by the subdriver */
6929dc6b 948 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
51977a8d
JFM		 949 break;
950
63eb9546 951 /* submit the URBs */
db870875
JFM		 952 for (n = 0; n < MAX_NURBS; n++) {
953 urb = gspca_dev->urb[n];
954 if (urb == NULL)
955 break;
956 ret = usb_submit_urb(urb, GFP_KERNEL);
1f53b0b0
JFM		 957 if (ret < 0)
958 break;
63eb9546
JFM		 959 }
960 if (ret >= 0)
27b12023
JFM		 961 break; /* transfer is started */
962
963 /* something when wrong
964 * stop the webcam and free the transfer resources */
e4dac289 965 gspca_stream_off(gspca_dev);
4bdf4a83 966 if (ret != -ENOSPC) {
133a9fe9
JP		 967 pr_err("usb_submit_urb alt %d err %d\n",
968 gspca_dev->alt, ret);
1f53b0b0 969 goto out;
4bdf4a83 970 }
1f53b0b0
JFM		 971
972 /* the bandwidth is not wide enough
25985edc 973 * negotiate or try a lower alternate setting */
4274d84c 974retry:
4bdf4a83 975 PDEBUG(D_ERR|D_STREAM,
27b12023
JFM		 976 "alt %d - bandwidth not wide enough - trying again",
977 alt);
1f53b0b0
JFM		 978 msleep(20); /* wait for kill complete */
979 if (gspca_dev->sd_desc->isoc_nego) {
980 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
981 if (ret < 0)
982 goto out;
983 } else {
27b12023
JFM		 984 if (alt_idx <= 0) {
985 pr_err("no transfer endpoint found\n");
1f53b0b0
JFM		 986 ret = -EIO;
987 goto out;
988 }
ac97ecc8 989 gspca_dev->alt = ep_tb[--alt_idx].alt;
1f53b0b0 990 }
63eb9546
JFM		 991 }
992out:
314b3e08
HG		 993 gspca_input_create_urb(gspca_dev);
994unlock:
63eb9546
JFM		 995 mutex_unlock(&gspca_dev->usb_lock);
996 return ret;
997}
998
d43fa32f 999static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
63eb9546 1000{
6a33091f 1001 struct gspca_ctrl *ctrl;
63eb9546
JFM		 1002 int i;
1003
1004 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
1005 gspca_dev->curr_mode = i;
1006 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
1007 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
c2446b3e 1008 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
6a33091f
JFM		 1009
1010 /* set the current control values to their default values
1011 * which may have changed in sd_init() */
62bba5dd
HV		 1012 /* does nothing if ctrl_handler == NULL */
1013 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
6a33091f
JFM		 1014 ctrl = gspca_dev->cam.ctrls;
1015 if (ctrl != NULL) {
1016 for (i = 0;
1017 i < gspca_dev->sd_desc->nctrls;
1018 i++, ctrl++)
1019 ctrl->val = ctrl->def;
1020 }
63eb9546
JFM		 1021}
1022
1023static int wxh_to_mode(struct gspca_dev *gspca_dev,
1024 int width, int height)
1025{
1026 int i;
1027
d43fa32f
JFM		 1028 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
1029 if (width >= gspca_dev->cam.cam_mode[i].width
1030 && height >= gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 1031 break;
1032 }
63eb9546
JFM		 1033 return i;
1034}
1035
63eb9546
JFM		 1036/*
1037 * search a mode with the right pixel format
1038 */
1039static int gspca_get_mode(struct gspca_dev *gspca_dev,
1040 int mode,
1041 int pixfmt)
1042{
1043 int modeU, modeD;
1044
1045 modeU = modeD = mode;
1046 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
1047 if (--modeD >= 0) {
c2446b3e
JFM		 1048 if (gspca_dev->cam.cam_mode[modeD].pixelformat
1049 == pixfmt)
63eb9546
JFM		 1050 return modeD;
1051 }
1052 if (++modeU < gspca_dev->cam.nmodes) {
c2446b3e
JFM		 1053 if (gspca_dev->cam.cam_mode[modeU].pixelformat
1054 == pixfmt)
63eb9546
JFM		 1055 return modeU;
1056 }
1057 }
1058 return -EINVAL;
1059}
1060
af1d9afa
BJ		 1061#ifdef CONFIG_VIDEO_ADV_DEBUG
1062static int vidioc_g_register(struct file *file, void *priv,
1063 struct v4l2_dbg_register *reg)
1064{
1065 int ret;
f4c1605a 1066 struct gspca_dev *gspca_dev = video_drvdata(file);
af1d9afa
BJ		 1067
1068 if (!gspca_dev->sd_desc->get_chip_ident)
cc7b6f25 1069 return -ENOTTY;
af1d9afa
BJ		 1070
1071 if (!gspca_dev->sd_desc->get_register)
cc7b6f25 1072 return -ENOTTY;
af1d9afa
BJ		 1073
1074 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1075 return -ERESTARTSYS;
8c4ebae4 1076 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1077 if (gspca_dev->present)
1078 ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
1079 else
1080 ret = -ENODEV;
1081 mutex_unlock(&gspca_dev->usb_lock);
1082
1083 return ret;
1084}
1085
1086static int vidioc_s_register(struct file *file, void *priv,
1087 struct v4l2_dbg_register *reg)
1088{
1089 int ret;
f4c1605a 1090 struct gspca_dev *gspca_dev = video_drvdata(file);
af1d9afa
BJ		 1091
1092 if (!gspca_dev->sd_desc->get_chip_ident)
cc7b6f25 1093 return -ENOTTY;
af1d9afa
BJ		 1094
1095 if (!gspca_dev->sd_desc->set_register)
cc7b6f25 1096 return -ENOTTY;
af1d9afa
BJ		 1097
1098 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1099 return -ERESTARTSYS;
8c4ebae4 1100 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1101 if (gspca_dev->present)
1102 ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
1103 else
1104 ret = -ENODEV;
1105 mutex_unlock(&gspca_dev->usb_lock);
1106
1107 return ret;
1108}
1109#endif
1110
1111static int vidioc_g_chip_ident(struct file *file, void *priv,
1112 struct v4l2_dbg_chip_ident *chip)
1113{
1114 int ret;
f4c1605a 1115 struct gspca_dev *gspca_dev = video_drvdata(file);
af1d9afa
BJ		 1116
1117 if (!gspca_dev->sd_desc->get_chip_ident)
cc7b6f25 1118 return -ENOTTY;
af1d9afa
BJ		 1119
1120 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1121 return -ERESTARTSYS;
8c4ebae4 1122 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1123 if (gspca_dev->present)
1124 ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
1125 else
1126 ret = -ENODEV;
1127 mutex_unlock(&gspca_dev->usb_lock);
1128
1129 return ret;
1130}
1131
e078770a 1132static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1133 struct v4l2_fmtdesc *fmtdesc)
1134{
f4c1605a 1135 struct gspca_dev *gspca_dev = video_drvdata(file);
6a7eba24 1136 int i, j, index;
63eb9546
JFM		 1137 __u32 fmt_tb[8];
1138
63eb9546
JFM		 1139 /* give an index to each format */
1140 index = 0;
1141 j = 0;
1142 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
c2446b3e 1143 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
63eb9546
JFM		 1144 j = 0;
1145 for (;;) {
1146 if (fmt_tb[j] == fmt_tb[index])
1147 break;
1148 j++;
1149 }
1150 if (j == index) {
1151 if (fmtdesc->index == index)
1152 break; /* new format */
1153 index++;
80297125 1154 if (index >= ARRAY_SIZE(fmt_tb))
63eb9546
JFM		 1155 return -EINVAL;
1156 }
1157 }
1158 if (i < 0)
1159 return -EINVAL; /* no more format */
1160
63eb9546 1161 fmtdesc->pixelformat = fmt_tb[index];
b796fb6e
JFM		 1162 if (gspca_dev->cam.cam_mode[i].sizeimage <
1163 gspca_dev->cam.cam_mode[i].width *
1164 gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 1165 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1166 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1167 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1168 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1169 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1170 fmtdesc->description[4] = '\0';
1171 return 0;
1172}
1173
e078770a 1174static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1175 struct v4l2_format *fmt)
1176{
f4c1605a 1177 struct gspca_dev *gspca_dev = video_drvdata(file);
c2446b3e 1178 int mode;
63eb9546 1179
c2446b3e
JFM		 1180 mode = gspca_dev->curr_mode;
1181 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1182 sizeof fmt->fmt.pix);
63eb9546
JFM		 1183 return 0;
1184}
1185
e078770a 1186static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1187 struct v4l2_format *fmt)
1188{
24c530b4 1189 int w, h, mode, mode2;
63eb9546 1190
4aa0d037
JFM		 1191 w = fmt->fmt.pix.width;
1192 h = fmt->fmt.pix.height;
d43fa32f 1193
335b3f88 1194#ifdef GSPCA_DEBUG
63eb9546
JFM		 1195 if (gspca_debug & D_CONF)
1196 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1197#endif
1198 /* search the closest mode for width and height */
1199 mode = wxh_to_mode(gspca_dev, w, h);
1200
1201 /* OK if right palette */
c2446b3e
JFM		 1202 if (gspca_dev->cam.cam_mode[mode].pixelformat
1203 != fmt->fmt.pix.pixelformat) {
63eb9546
JFM		 1204
1205 /* else, search the closest mode with the same pixel format */
1206 mode2 = gspca_get_mode(gspca_dev, mode,
1207 fmt->fmt.pix.pixelformat);
c2446b3e 1208 if (mode2 >= 0)
63eb9546 1209 mode = mode2;
c2446b3e
JFM		 1210/* else
1211 ; * no chance, return this mode */
63eb9546 1212 }
c2446b3e
JFM		 1213 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1214 sizeof fmt->fmt.pix);
63eb9546
JFM		 1215 return mode; /* used when s_fmt */
1216}
1217
e078770a 1218static int vidioc_try_fmt_vid_cap(struct file *file,
63eb9546
JFM		 1219 void *priv,
1220 struct v4l2_format *fmt)
1221{
f4c1605a 1222 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1223 int ret;
1224
e078770a 1225 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1226 if (ret < 0)
1227 return ret;
1228 return 0;
1229}
1230
e078770a 1231static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1232 struct v4l2_format *fmt)
1233{
f4c1605a 1234 struct gspca_dev *gspca_dev = video_drvdata(file);
d43fa32f 1235 int ret;
63eb9546 1236
e2997a72
HG		 1237 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1238 return -ERESTARTSYS;
d43fa32f 1239
e078770a 1240 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1241 if (ret < 0)
1242 goto out;
1243
d43fa32f
JFM		 1244 if (gspca_dev->nframes != 0
1245 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1246 ret = -EINVAL;
1247 goto out;
1248 }
1249
50a871fe
JFM		 1250 if (ret == gspca_dev->curr_mode) {
1251 ret = 0;
63eb9546 1252 goto out; /* same mode */
50a871fe 1253 }
d43fa32f
JFM		 1254
1255 if (gspca_dev->streaming) {
1256 ret = -EBUSY;
1257 goto out;
e2997a72 1258 }
4aa0d037
JFM		 1259 gspca_dev->width = fmt->fmt.pix.width;
1260 gspca_dev->height = fmt->fmt.pix.height;
63eb9546
JFM		 1261 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1262 gspca_dev->curr_mode = ret;
d43fa32f 1263
d43fa32f 1264 ret = 0;
63eb9546
JFM		 1265out:
1266 mutex_unlock(&gspca_dev->queue_lock);
1267 return ret;
1268}
1269
11c635a2
HG		 1270static int vidioc_enum_framesizes(struct file *file, void *priv,
1271 struct v4l2_frmsizeenum *fsize)
1272{
f4c1605a 1273 struct gspca_dev *gspca_dev = video_drvdata(file);
11c635a2
HG		 1274 int i;
1275 __u32 index = 0;
1276
1277 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1278 if (fsize->pixel_format !=
1279 gspca_dev->cam.cam_mode[i].pixelformat)
1280 continue;
1281
1282 if (fsize->index == index) {
1283 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1284 fsize->discrete.width =
1285 gspca_dev->cam.cam_mode[i].width;
1286 fsize->discrete.height =
1287 gspca_dev->cam.cam_mode[i].height;
1288 return 0;
1289 }
1290 index++;
1291 }
1292
1293 return -EINVAL;
1294}
1295
28ffe77f
AO		 1296static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1297 struct v4l2_frmivalenum *fival)
1298{
f4c1605a 1299 struct gspca_dev *gspca_dev = video_drvdata(filp);
28ffe77f
AO		 1300 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1301 __u32 i;
1302
1303 if (gspca_dev->cam.mode_framerates == NULL ||
1304 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1305 return -EINVAL;
1306
1307 if (fival->pixel_format !=
1308 gspca_dev->cam.cam_mode[mode].pixelformat)
1309 return -EINVAL;
1310
1311 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1312 if (fival->index == i) {
1313 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1314 fival->discrete.numerator = 1;
1315 fival->discrete.denominator =
1316 gspca_dev->cam.mode_framerates[mode].rates[i];
1317 return 0;
1318 }
1319 }
1320
1321 return -EINVAL;
1322}
1323
d0182306 1324static void gspca_release(struct video_device *vfd)
6b060ffe 1325{
d0182306 1326 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
6b060ffe 1327
38c7c036
LP		 1328 PDEBUG(D_PROBE, "%s released",
1329 video_device_node_name(&gspca_dev->vdev));
6b060ffe 1330
62bba5dd 1331 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
2333565d 1332 v4l2_device_unregister(&gspca_dev->v4l2_dev);
6b060ffe
FZ		 1333 kfree(gspca_dev->usb_buf);
1334 kfree(gspca_dev);
1335}
1336
bec43661 1337static int dev_open(struct file *file)
63eb9546 1338{
f4c1605a 1339 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546 1340
0d07e240 1341 PDEBUG(D_STREAM, "[%s] open", current->comm);
7f6eb118
HG		 1342 if (!gspca_dev->present)
1343 return -ENODEV;
5c4fa002
JFM		 1344
1345 /* protect the subdriver against rmmod */
7f6eb118
HG		 1346 if (!try_module_get(gspca_dev->module))
1347 return -ENODEV;
6b060ffe 1348
335b3f88 1349#ifdef GSPCA_DEBUG
63eb9546 1350 /* activate the v4l2 debug */
d43fa32f 1351 if (gspca_debug & D_V4L2)
a12ca6a6 1352 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
9de436cf 1353 | V4L2_DEBUG_IOCTL_ARG;
63eb9546 1354 else
a12ca6a6 1355 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
9de436cf 1356 | V4L2_DEBUG_IOCTL_ARG);
63eb9546 1357#endif
2333565d 1358 return v4l2_fh_open(file);
63eb9546
JFM		 1359}
1360
bec43661 1361static int dev_close(struct file *file)
63eb9546 1362{
f4c1605a 1363 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546 1364
0d07e240 1365 PDEBUG(D_STREAM, "[%s] close", current->comm);
e2997a72
HG		 1366 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1367 return -ERESTARTSYS;
e2997a72 1368
5b77ae77 1369 /* if the file did the capture, free the streaming resources */
4aa0d037 1370 if (gspca_dev->capt_file == file) {
a1e8288b
JFM		 1371 if (gspca_dev->streaming) {
1372 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1373 gspca_dev->usb_err = 0;
a1e8288b
JFM		 1374 gspca_stream_off(gspca_dev);
1375 mutex_unlock(&gspca_dev->usb_lock);
1376 }
4aa0d037 1377 frame_free(gspca_dev);
4aa0d037 1378 }
5c4fa002 1379 module_put(gspca_dev->module);
63eb9546 1380 mutex_unlock(&gspca_dev->queue_lock);
6b060ffe 1381
d43fa32f 1382 PDEBUG(D_STREAM, "close done");
6b060ffe 1383
2333565d 1384 return v4l2_fh_release(file);
63eb9546
JFM		 1385}
1386
1387static int vidioc_querycap(struct file *file, void *priv,
1388 struct v4l2_capability *cap)
1389{
f4c1605a 1390 struct gspca_dev *gspca_dev = video_drvdata(file);
090264e5 1391 int ret;
63eb9546 1392
090264e5
JFM		 1393 /* protect the access to the usb device */
1394 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1395 return -ERESTARTSYS;
1396 if (!gspca_dev->present) {
1397 ret = -ENODEV;
1398 goto out;
1399 }
e7d712cc 1400 strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
d8518590 1401 sizeof cap->driver);
c6edaf16 1402 if (gspca_dev->dev->product != NULL) {
e7d712cc 1403 strlcpy((char *) cap->card, gspca_dev->dev->product,
c6edaf16
JFM		 1404 sizeof cap->card);
1405 } else {
d8518590 1406 snprintf((char *) cap->card, sizeof cap->card,
c6edaf16
JFM		 1407 "USB Camera (%04x:%04x)",
1408 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1409 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1410 }
d8518590
JFM		 1411 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1412 sizeof(cap->bus_info));
cc7b6f25 1413 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
63eb9546
JFM		 1414 | V4L2_CAP_STREAMING
1415 | V4L2_CAP_READWRITE;
cc7b6f25 1416 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
090264e5
JFM		 1417 ret = 0;
1418out:
1419 mutex_unlock(&gspca_dev->usb_lock);
1420 return ret;
63eb9546
JFM		 1421}
1422
6a33091f 1423static int get_ctrl(struct gspca_dev *gspca_dev,
a0001a28
HG		 1424 int id)
1425{
1426 const struct ctrl *ctrls;
1427 int i;
1428
1429 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1430 i < gspca_dev->sd_desc->nctrls;
1431 i++, ctrls++) {
1432 if (gspca_dev->ctrl_dis & (1 << i))
1433 continue;
1434 if (id == ctrls->qctrl.id)
6a33091f 1435 return i;
a0001a28 1436 }
6a33091f 1437 return -1;
a0001a28
HG		 1438}
1439
63eb9546
JFM		 1440static int vidioc_queryctrl(struct file *file, void *priv,
1441 struct v4l2_queryctrl *q_ctrl)
1442{
f4c1605a 1443 struct gspca_dev *gspca_dev = video_drvdata(file);
a0001a28 1444 const struct ctrl *ctrls;
6a33091f
JFM		 1445 struct gspca_ctrl *gspca_ctrl;
1446 int i, idx;
6a7eba24
JFM		 1447 u32 id;
1448
1449 id = q_ctrl->id;
1450 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1451 id &= V4L2_CTRL_ID_MASK;
1452 id++;
6a33091f 1453 idx = -1;
6a7eba24 1454 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
a0001a28 1455 if (gspca_dev->ctrl_dis & (1 << i))
f50ba1be 1456 continue;
b8bfb5fb 1457 if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
f50ba1be 1458 continue;
6a33091f
JFM		 1459 if (idx >= 0
1460 && gspca_dev->sd_desc->ctrls[i].qctrl.id
780e3121 1461 > gspca_dev->sd_desc->ctrls[idx].qctrl.id)
b8bfb5fb 1462 continue;
6a33091f 1463 idx = i;
63eb9546 1464 }
a0001a28 1465 } else {
6a33091f 1466 idx = get_ctrl(gspca_dev, id);
63eb9546 1467 }
6a33091f
JFM		 1468 if (idx < 0)
1469 return -EINVAL;
1470 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1471 memcpy(q_ctrl, &ctrls->qctrl, sizeof *q_ctrl);
1472 if (gspca_dev->cam.ctrls != NULL) {
1473 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1474 q_ctrl->default_value = gspca_ctrl->def;
1475 q_ctrl->minimum = gspca_ctrl->min;
1476 q_ctrl->maximum = gspca_ctrl->max;
1477 }
1478 if (gspca_dev->ctrl_inac & (1 << idx))
4af85668 1479 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
f50ba1be 1480 return 0;
63eb9546
JFM		 1481}
1482
1483static int vidioc_s_ctrl(struct file *file, void *priv,
1484 struct v4l2_control *ctrl)
1485{
f4c1605a 1486 struct gspca_dev *gspca_dev = video_drvdata(file);
a5ae2062 1487 const struct ctrl *ctrls;
6a33091f
JFM		 1488 struct gspca_ctrl *gspca_ctrl;
1489 int idx, ret;
63eb9546 1490
6a33091f
JFM		 1491 idx = get_ctrl(gspca_dev, ctrl->id);
1492 if (idx < 0)
a0001a28 1493 return -EINVAL;
6a33091f
JFM		 1494 if (gspca_dev->ctrl_inac & (1 << idx))
1495 return -EINVAL;
1496 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1497 if (gspca_dev->cam.ctrls != NULL) {
1498 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1499 if (ctrl->value < gspca_ctrl->min
1500 || ctrl->value > gspca_ctrl->max)
1501 return -ERANGE;
1502 } else {
1503 gspca_ctrl = NULL;
1504 if (ctrl->value < ctrls->qctrl.minimum
1505 || ctrl->value > ctrls->qctrl.maximum)
1506 return -ERANGE;
1507 }
a0001a28
HG		 1508 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1509 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1510 return -ERESTARTSYS;
6a33091f
JFM		 1511 if (!gspca_dev->present) {
1512 ret = -ENODEV;
1513 goto out;
1514 }
8c4ebae4 1515 gspca_dev->usb_err = 0;
6a33091f 1516 if (ctrls->set != NULL) {
a0001a28 1517 ret = ctrls->set(gspca_dev, ctrl->value);
6a33091f
JFM		 1518 goto out;
1519 }
1520 if (gspca_ctrl != NULL) {
1521 gspca_ctrl->val = ctrl->value;
1522 if (ctrls->set_control != NULL
1523 && gspca_dev->streaming)
1524 ctrls->set_control(gspca_dev);
1525 }
1526 ret = gspca_dev->usb_err;
1527out:
a0001a28
HG		 1528 mutex_unlock(&gspca_dev->usb_lock);
1529 return ret;
63eb9546
JFM		 1530}
1531
1532static int vidioc_g_ctrl(struct file *file, void *priv,
1533 struct v4l2_control *ctrl)
1534{
f4c1605a 1535 struct gspca_dev *gspca_dev = video_drvdata(file);
a5ae2062 1536 const struct ctrl *ctrls;
6a33091f 1537 int idx, ret;
63eb9546 1538
6a33091f
JFM		 1539 idx = get_ctrl(gspca_dev, ctrl->id);
1540 if (idx < 0)
a0001a28 1541 return -EINVAL;
6a33091f 1542 ctrls = &gspca_dev->sd_desc->ctrls[idx];
a0001a28
HG		 1543
1544 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1545 return -ERESTARTSYS;
6a33091f
JFM		 1546 if (!gspca_dev->present) {
1547 ret = -ENODEV;
1548 goto out;
1549 }
8c4ebae4 1550 gspca_dev->usb_err = 0;
6a33091f 1551 if (ctrls->get != NULL) {
a0001a28 1552 ret = ctrls->get(gspca_dev, &ctrl->value);
6a33091f
JFM		 1553 goto out;
1554 }
1555 if (gspca_dev->cam.ctrls != NULL)
1556 ctrl->value = gspca_dev->cam.ctrls[idx].val;
1557 ret = 0;
1558out:
a0001a28
HG		 1559 mutex_unlock(&gspca_dev->usb_lock);
1560 return ret;
63eb9546
JFM		 1561}
1562
1563static int vidioc_querymenu(struct file *file, void *priv,
1564 struct v4l2_querymenu *qmenu)
1565{
f4c1605a 1566 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1567
1568 if (!gspca_dev->sd_desc->querymenu)
cc7b6f25 1569 return -ENOTTY;
63eb9546
JFM		 1570 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1571}
1572
1573static int vidioc_enum_input(struct file *file, void *priv,
1574 struct v4l2_input *input)
1575{
f4c1605a 1576 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1577
1578 if (input->index != 0)
1579 return -EINVAL;
63eb9546 1580 input->type = V4L2_INPUT_TYPE_CAMERA;
dfa76fa2 1581 input->status = gspca_dev->cam.input_flags;
e7d712cc 1582 strlcpy(input->name, gspca_dev->sd_desc->name,
63eb9546
JFM		 1583 sizeof input->name);
1584 return 0;
1585}
1586
1587static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1588{
1589 *i = 0;
1590 return 0;
1591}
1592
1593static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1594{
1595 if (i > 0)
1596 return -EINVAL;
1597 return (0);
1598}
1599
1600static int vidioc_reqbufs(struct file *file, void *priv,
1601 struct v4l2_requestbuffers *rb)
1602{
f4c1605a 1603 struct gspca_dev *gspca_dev = video_drvdata(file);
832d0a91 1604 int i, ret = 0, streaming;
63eb9546 1605
a2ba6f27
JFM		 1606 i = rb->memory; /* (avoid compilation warning) */
1607 switch (i) {
5b77ae77 1608 case GSPCA_MEMORY_READ: /* (internal call) */
d43fa32f 1609 case V4L2_MEMORY_MMAP:
d43fa32f 1610 case V4L2_MEMORY_USERPTR:
6a7eba24 1611 break;
d43fa32f 1612 default:
63eb9546 1613 return -EINVAL;
d43fa32f 1614 }
e2997a72
HG		 1615 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1616 return -ERESTARTSYS;
d43fa32f 1617
5b77ae77 1618 if (gspca_dev->memory != GSPCA_MEMORY_NO
ce5610bc 1619 && gspca_dev->memory != GSPCA_MEMORY_READ
5b77ae77 1620 && gspca_dev->memory != rb->memory) {
4aa0d037
JFM		 1621 ret = -EBUSY;
1622 goto out;
1623 }
d43fa32f 1624
5b77ae77
JFM		 1625 /* only one file may do the capture */
1626 if (gspca_dev->capt_file != NULL
1627 && gspca_dev->capt_file != file) {
1628 ret = -EBUSY;
1629 goto out;
1630 }
1631
1632 /* if allocated, the buffers must not be mapped */
1633 for (i = 0; i < gspca_dev->nframes; i++) {
1634 if (gspca_dev->frame[i].vma_use_count) {
ac0d6df6
JFM		 1635 ret = -EBUSY;
1636 goto out;
1637 }
5b77ae77
JFM		 1638 }
1639
1640 /* stop streaming */
832d0a91
JFM		 1641 streaming = gspca_dev->streaming;
1642 if (streaming) {
5b77ae77 1643 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1644 gspca_dev->usb_err = 0;
5b77ae77
JFM		 1645 gspca_stream_off(gspca_dev);
1646 mutex_unlock(&gspca_dev->usb_lock);
59929cef
JFM		 1647
1648 /* Don't restart the stream when switching from read
1649 * to mmap mode */
1650 if (gspca_dev->memory == GSPCA_MEMORY_READ)
1651 streaming = 0;
5b77ae77
JFM		 1652 }
1653
1654 /* free the previous allocated buffers, if any */
d642de2e 1655 if (gspca_dev->nframes != 0)
5b77ae77 1656 frame_free(gspca_dev);
5b77ae77
JFM		 1657 if (rb->count == 0) /* unrequest */
1658 goto out;
d642de2e 1659 ret = frame_alloc(gspca_dev, file, rb->memory, rb->count);
5b77ae77
JFM		 1660 if (ret == 0) {
1661 rb->count = gspca_dev->nframes;
832d0a91
JFM		 1662 if (streaming)
1663 ret = gspca_init_transfer(gspca_dev);
4aa0d037
JFM		 1664 }
1665out:
63eb9546
JFM		 1666 mutex_unlock(&gspca_dev->queue_lock);
1667 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1668 return ret;
1669}
1670
1671static int vidioc_querybuf(struct file *file, void *priv,
1672 struct v4l2_buffer *v4l2_buf)
1673{
f4c1605a 1674 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1675 struct gspca_frame *frame;
1676
13752bd9 1677 if (v4l2_buf->index < 0
63eb9546
JFM		 1678 || v4l2_buf->index >= gspca_dev->nframes)
1679 return -EINVAL;
1680
1681 frame = &gspca_dev->frame[v4l2_buf->index];
1682 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1683 return 0;
1684}
1685
1686static int vidioc_streamon(struct file *file, void *priv,
1687 enum v4l2_buf_type buf_type)
1688{
f4c1605a 1689 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1690 int ret;
1691
63eb9546
JFM		 1692 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1693 return -EINVAL;
e2997a72
HG		 1694 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1695 return -ERESTARTSYS;
090264e5 1696
18bf99aa
JFM		 1697 /* check the capture file */
1698 if (gspca_dev->capt_file != file) {
1699 ret = -EBUSY;
1700 goto out;
1701 }
1702
1edabe71
JFM		 1703 if (gspca_dev->nframes == 0
1704 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
63eb9546
JFM		 1705 ret = -EINVAL;
1706 goto out;
1707 }
1708 if (!gspca_dev->streaming) {
1709 ret = gspca_init_transfer(gspca_dev);
1710 if (ret < 0)
1711 goto out;
1712 }
335b3f88 1713#ifdef GSPCA_DEBUG
63eb9546
JFM		 1714 if (gspca_debug & D_STREAM) {
1715 PDEBUG_MODE("stream on OK",
1716 gspca_dev->pixfmt,
1717 gspca_dev->width,
1718 gspca_dev->height);
1719 }
1720#endif
e2997a72 1721 ret = 0;
63eb9546
JFM		 1722out:
1723 mutex_unlock(&gspca_dev->queue_lock);
1724 return ret;
1725}
1726
1727static int vidioc_streamoff(struct file *file, void *priv,
1728 enum v4l2_buf_type buf_type)
1729{
f4c1605a 1730 struct gspca_dev *gspca_dev = video_drvdata(file);
f7059eaa 1731 int ret;
63eb9546 1732
63eb9546
JFM		 1733 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1734 return -EINVAL;
4e770f76 1735
4aa0d037
JFM		 1736 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1737 return -ERESTARTSYS;
5b77ae77 1738
4e770f76
HG		 1739 if (!gspca_dev->streaming) {
1740 ret = 0;
1741 goto out;
1742 }
1743
18bf99aa
JFM		 1744 /* check the capture file */
1745 if (gspca_dev->capt_file != file) {
1746 ret = -EBUSY;
1747 goto out;
1748 }
1749
5b77ae77 1750 /* stop streaming */
4aa0d037
JFM		 1751 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1752 ret = -ERESTARTSYS;
1753 goto out;
63eb9546 1754 }
8c4ebae4 1755 gspca_dev->usb_err = 0;
4aa0d037 1756 gspca_stream_off(gspca_dev);
4aa0d037 1757 mutex_unlock(&gspca_dev->usb_lock);
0d0ae15d
HG		 1758 /* In case another thread is waiting in dqbuf */
1759 wake_up_interruptible(&gspca_dev->wq);
5b77ae77 1760
f7059eaa
JFM		 1761 /* empty the transfer queues */
1762 atomic_set(&gspca_dev->fr_q, 0);
1763 atomic_set(&gspca_dev->fr_i, 0);
1764 gspca_dev->fr_o = 0;
5b77ae77 1765 ret = 0;
4aa0d037
JFM		 1766out:
1767 mutex_unlock(&gspca_dev->queue_lock);
1768 return ret;
63eb9546
JFM		 1769}
1770
1771static int vidioc_g_jpegcomp(struct file *file, void *priv,
1772 struct v4l2_jpegcompression *jpegcomp)
1773{
f4c1605a 1774 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1775 int ret;
1776
1777 if (!gspca_dev->sd_desc->get_jcomp)
cc7b6f25 1778 return -ENOTTY;
e2997a72
HG		 1779 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1780 return -ERESTARTSYS;
8c4ebae4 1781 gspca_dev->usb_err = 0;
090264e5
JFM		 1782 if (gspca_dev->present)
1783 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1784 else
1785 ret = -ENODEV;
63eb9546
JFM		 1786 mutex_unlock(&gspca_dev->usb_lock);
1787 return ret;
1788}
1789
1790static int vidioc_s_jpegcomp(struct file *file, void *priv,
1791 struct v4l2_jpegcompression *jpegcomp)
1792{
f4c1605a 1793 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1794 int ret;
1795
63eb9546 1796 if (!gspca_dev->sd_desc->set_jcomp)
cc7b6f25 1797 return -ENOTTY;
f86d4a91
JP		 1798 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1799 return -ERESTARTSYS;
8c4ebae4 1800 gspca_dev->usb_err = 0;
090264e5
JFM		 1801 if (gspca_dev->present)
1802 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1803 else
1804 ret = -ENODEV;
63eb9546
JFM		 1805 mutex_unlock(&gspca_dev->usb_lock);
1806 return ret;
1807}
1808
1809static int vidioc_g_parm(struct file *filp, void *priv,
1810 struct v4l2_streamparm *parm)
1811{
f4c1605a 1812 struct gspca_dev *gspca_dev = video_drvdata(filp);
63eb9546 1813
63eb9546 1814 parm->parm.capture.readbuffers = gspca_dev->nbufread;
627a5ef7
JP		 1815
1816 if (gspca_dev->sd_desc->get_streamparm) {
1817 int ret;
1818
1819 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1820 return -ERESTARTSYS;
668f44a6
JFM		 1821 if (gspca_dev->present) {
1822 gspca_dev->usb_err = 0;
1823 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1824 ret = gspca_dev->usb_err;
1825 } else {
090264e5 1826 ret = -ENODEV;
668f44a6 1827 }
627a5ef7
JP		 1828 mutex_unlock(&gspca_dev->usb_lock);
1829 return ret;
1830 }
1831
63eb9546
JFM		 1832 return 0;
1833}
1834
1835static int vidioc_s_parm(struct file *filp, void *priv,
1836 struct v4l2_streamparm *parm)
1837{
f4c1605a 1838 struct gspca_dev *gspca_dev = video_drvdata(filp);
63eb9546
JFM		 1839 int n;
1840
63eb9546 1841 n = parm->parm.capture.readbuffers;
f7059eaa 1842 if (n == 0 || n >= GSPCA_MAX_FRAMES)
63eb9546
JFM		 1843 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1844 else
1845 gspca_dev->nbufread = n;
627a5ef7
JP		 1846
1847 if (gspca_dev->sd_desc->set_streamparm) {
1848 int ret;
1849
1850 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1851 return -ERESTARTSYS;
668f44a6
JFM		 1852 if (gspca_dev->present) {
1853 gspca_dev->usb_err = 0;
1854 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1855 ret = gspca_dev->usb_err;
1856 } else {
090264e5 1857 ret = -ENODEV;
668f44a6 1858 }
627a5ef7
JP		 1859 mutex_unlock(&gspca_dev->usb_lock);
1860 return ret;
1861 }
1862
63eb9546
JFM		 1863 return 0;
1864}
1865
63eb9546
JFM		 1866static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1867{
f4c1605a 1868 struct gspca_dev *gspca_dev = video_drvdata(file);
efab8211 1869 struct gspca_frame *frame;
63eb9546
JFM		 1870 struct page *page;
1871 unsigned long addr, start, size;
1872 int i, ret;
63eb9546
JFM		 1873
1874 start = vma->vm_start;
1875 size = vma->vm_end - vma->vm_start;
1876 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1877
e2997a72
HG		 1878 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1879 return -ERESTARTSYS;
63eb9546
JFM		 1880 if (!gspca_dev->present) {
1881 ret = -ENODEV;
4aa0d037
JFM		 1882 goto out;
1883 }
1884 if (gspca_dev->capt_file != file) {
1885 ret = -EINVAL;
1886 goto out;
63eb9546
JFM		 1887 }
1888
efab8211 1889 frame = NULL;
63eb9546
JFM		 1890 for (i = 0; i < gspca_dev->nframes; ++i) {
1891 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1892 PDEBUG(D_STREAM, "mmap bad memory type");
1893 break;
1894 }
1895 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1896 == vma->vm_pgoff) {
1897 frame = &gspca_dev->frame[i];
1898 break;
1899 }
1900 }
efab8211 1901 if (frame == NULL) {
63eb9546
JFM		 1902 PDEBUG(D_STREAM, "mmap no frame buffer found");
1903 ret = -EINVAL;
4aa0d037 1904 goto out;
63eb9546 1905 }
38bff697 1906 if (size != frame->v4l2_buf.length) {
63eb9546
JFM		 1907 PDEBUG(D_STREAM, "mmap bad size");
1908 ret = -EINVAL;
4aa0d037 1909 goto out;
63eb9546
JFM		 1910 }
1911
1912 /*
1913 * - VM_IO marks the area as being a mmaped region for I/O to a
1914 * device. It also prevents the region from being core dumped.
1915 */
1916 vma->vm_flags |= VM_IO;
1917
1918 addr = (unsigned long) frame->data;
1919 while (size > 0) {
1920 page = vmalloc_to_page((void *) addr);
1921 ret = vm_insert_page(vma, start, page);
1922 if (ret < 0)
4aa0d037 1923 goto out;
63eb9546
JFM		 1924 start += PAGE_SIZE;
1925 addr += PAGE_SIZE;
1926 size -= PAGE_SIZE;
1927 }
1928
d50e257e 1929 vma->vm_ops = &gspca_vm_ops;
63eb9546
JFM		 1930 vma->vm_private_data = frame;
1931 gspca_vm_open(vma);
e2997a72 1932 ret = 0;
4aa0d037 1933out:
63eb9546
JFM		 1934 mutex_unlock(&gspca_dev->queue_lock);
1935 return ret;
1936}
1937
27074efa
HG		 1938static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file,
1939 enum v4l2_memory memory)
1940{
1941 if (!gspca_dev->present)
1942 return -ENODEV;
1943 if (gspca_dev->capt_file != file || gspca_dev->memory != memory ||
1944 !gspca_dev->streaming)
1945 return -EINVAL;
1946
1947 /* check if a frame is ready */
1948 return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i);
1949}
1950
1951static int frame_ready(struct gspca_dev *gspca_dev, struct file *file,
1952 enum v4l2_memory memory)
1953{
1954 int ret;
1955
1956 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1957 return -ERESTARTSYS;
1958 ret = frame_ready_nolock(gspca_dev, file, memory);
1959 mutex_unlock(&gspca_dev->queue_lock);
1960 return ret;
1961}
1962
63eb9546 1963/*
27074efa 1964 * dequeue a video buffer
63eb9546 1965 *
27074efa 1966 * If nonblock_ing is false, block until a buffer is available.
63eb9546 1967 */
27074efa
HG		 1968static int vidioc_dqbuf(struct file *file, void *priv,
1969 struct v4l2_buffer *v4l2_buf)
63eb9546 1970{
f4c1605a 1971 struct gspca_dev *gspca_dev = video_drvdata(file);
27074efa
HG		 1972 struct gspca_frame *frame;
1973 int i, j, ret;
63eb9546 1974
27074efa
HG		 1975 PDEBUG(D_FRAM, "dqbuf");
1976
1977 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1978 return -ERESTARTSYS;
1979
1980 for (;;) {
1981 ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory);
1982 if (ret < 0)
1983 goto out;
1984 if (ret > 0)
1985 break;
1986
1987 mutex_unlock(&gspca_dev->queue_lock);
1988
1989 if (file->f_flags & O_NONBLOCK)
181b704f
HG		 1990 return -EAGAIN;
1991
1992 /* wait till a frame is ready */
4aa0d037 1993 ret = wait_event_interruptible_timeout(gspca_dev->wq,
27074efa 1994 frame_ready(gspca_dev, file, v4l2_buf->memory),
181b704f
HG		 1995 msecs_to_jiffies(3000));
1996 if (ret < 0)
1997 return ret;
27074efa 1998 if (ret == 0)
e2997a72 1999 return -EIO;
27074efa
HG		 2000
2001 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
2002 return -ERESTARTSYS;
63eb9546 2003 }
181b704f 2004
27074efa
HG		 2005 i = gspca_dev->fr_o;
2006 j = gspca_dev->fr_queue[i];
2007 frame = &gspca_dev->frame[j];
2008
f7059eaa 2009 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
e2997a72 2010
739570bb
JFM		 2011 if (gspca_dev->sd_desc->dq_callback) {
2012 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 2013 gspca_dev->usb_err = 0;
090264e5
JFM		 2014 if (gspca_dev->present)
2015 gspca_dev->sd_desc->dq_callback(gspca_dev);
739570bb
JFM		 2016 mutex_unlock(&gspca_dev->usb_lock);
2017 }
5b77ae77 2018
4a82bc60
HG		 2019 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
2020 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
2021 PDEBUG(D_FRAM, "dqbuf %d", j);
2022 ret = 0;
2023
ac0d6df6 2024 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
c6eb8eaf 2025 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
ac0d6df6
JFM		 2026 frame->data,
2027 frame->v4l2_buf.bytesused)) {
2028 PDEBUG(D_ERR|D_STREAM,
2029 "dqbuf cp to user failed");
2030 ret = -EFAULT;
ac0d6df6
JFM		 2031 }
2032 }
4aa0d037 2033out:
27074efa 2034 mutex_unlock(&gspca_dev->queue_lock);
63eb9546
JFM		 2035 return ret;
2036}
2037
2038/*
2039 * queue a video buffer
2040 *
2041 * Attempting to queue a buffer that has already been
2042 * queued will return -EINVAL.
2043 */
2044static int vidioc_qbuf(struct file *file, void *priv,
2045 struct v4l2_buffer *v4l2_buf)
2046{
f4c1605a 2047 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 2048 struct gspca_frame *frame;
2049 int i, index, ret;
2050
2051 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
63eb9546 2052
5b77ae77
JFM		 2053 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
2054 return -ERESTARTSYS;
2055
63eb9546
JFM		 2056 index = v4l2_buf->index;
2057 if ((unsigned) index >= gspca_dev->nframes) {
d43fa32f 2058 PDEBUG(D_FRAM,
63eb9546 2059 "qbuf idx %d >= %d", index, gspca_dev->nframes);
5b77ae77
JFM		 2060 ret = -EINVAL;
2061 goto out;
63eb9546 2062 }
5b77ae77 2063 if (v4l2_buf->memory != gspca_dev->memory) {
d43fa32f 2064 PDEBUG(D_FRAM, "qbuf bad memory type");
5b77ae77
JFM		 2065 ret = -EINVAL;
2066 goto out;
63eb9546 2067 }
e2997a72 2068
5b77ae77 2069 frame = &gspca_dev->frame[index];
d43fa32f
JFM		 2070 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
2071 PDEBUG(D_FRAM, "qbuf bad state");
63eb9546
JFM		 2072 ret = -EINVAL;
2073 goto out;
2074 }
2075
2076 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
63eb9546 2077
d43fa32f 2078 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
63eb9546
JFM		 2079 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
2080 frame->v4l2_buf.length = v4l2_buf->length;
2081 }
2082
2083 /* put the buffer in the 'queued' queue */
f7059eaa 2084 i = atomic_read(&gspca_dev->fr_q);
63eb9546 2085 gspca_dev->fr_queue[i] = index;
f7059eaa 2086 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
63eb9546
JFM		 2087
2088 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
2089 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
2090 ret = 0;
2091out:
2092 mutex_unlock(&gspca_dev->queue_lock);
2093 return ret;
2094}
2095
d43fa32f
JFM		 2096/*
2097 * allocate the resources for read()
2098 */
2099static int read_alloc(struct gspca_dev *gspca_dev,
2100 struct file *file)
63eb9546 2101{
63eb9546 2102 struct v4l2_buffer v4l2_buf;
d43fa32f 2103 int i, ret;
63eb9546 2104
d43fa32f 2105 PDEBUG(D_STREAM, "read alloc");
63eb9546
JFM		 2106 if (gspca_dev->nframes == 0) {
2107 struct v4l2_requestbuffers rb;
2108
2109 memset(&rb, 0, sizeof rb);
2110 rb.count = gspca_dev->nbufread;
2111 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2112 rb.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2113 ret = vidioc_reqbufs(file, gspca_dev, &rb);
2114 if (ret != 0) {
d43fa32f 2115 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
63eb9546
JFM		 2116 return ret;
2117 }
2118 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2119 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2120 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2121 for (i = 0; i < gspca_dev->nbufread; i++) {
2122 v4l2_buf.index = i;
63eb9546
JFM		 2123 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2124 if (ret != 0) {
2125 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
2126 return ret;
2127 }
2128 }
d43fa32f
JFM		 2129 gspca_dev->memory = GSPCA_MEMORY_READ;
2130 }
4aa0d037 2131
d43fa32f
JFM		 2132 /* start streaming */
2133 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
2134 if (ret != 0)
2135 PDEBUG(D_STREAM, "read streamon err %d", ret);
2136 return ret;
2137}
2138
2139static unsigned int dev_poll(struct file *file, poll_table *wait)
2140{
f4c1605a 2141 struct gspca_dev *gspca_dev = video_drvdata(file);
f7059eaa 2142 int ret;
d43fa32f
JFM		 2143
2144 PDEBUG(D_FRAM, "poll");
2145
2146 poll_wait(file, &gspca_dev->wq, wait);
d43fa32f 2147
5b77ae77 2148 /* if reqbufs is not done, the user would use read() */
ee362991 2149 if (gspca_dev->memory == GSPCA_MEMORY_NO) {
d43fa32f 2150 ret = read_alloc(gspca_dev, file);
5b77ae77
JFM		 2151 if (ret != 0)
2152 return POLLERR;
63eb9546
JFM		 2153 }
2154
d43fa32f
JFM		 2155 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
2156 return POLLERR;
d43fa32f 2157
f7059eaa
JFM		 2158 /* check if an image has been received */
2159 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
2160 ret = POLLIN | POLLRDNORM; /* yes */
d43fa32f
JFM		 2161 else
2162 ret = 0;
d57fb9f8 2163 ret |= v4l2_ctrl_poll(file, wait);
d43fa32f 2164 mutex_unlock(&gspca_dev->queue_lock);
090264e5
JFM		 2165 if (!gspca_dev->present)
2166 return POLLHUP;
d43fa32f
JFM		 2167 return ret;
2168}
2169
2170static ssize_t dev_read(struct file *file, char __user *data,
2171 size_t count, loff_t *ppos)
2172{
f4c1605a 2173 struct gspca_dev *gspca_dev = video_drvdata(file);
d43fa32f
JFM		 2174 struct gspca_frame *frame;
2175 struct v4l2_buffer v4l2_buf;
2176 struct timeval timestamp;
82643d0e 2177 int n, ret, ret2;
d43fa32f 2178
a9e11134 2179 PDEBUG(D_FRAM, "read (%zd)", count);
d43fa32f
JFM		 2180 if (!gspca_dev->present)
2181 return -ENODEV;
ee362991 2182 if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */
d43fa32f
JFM		 2183 ret = read_alloc(gspca_dev, file);
2184 if (ret != 0)
2185 return ret;
d43fa32f
JFM		 2186 }
2187
63eb9546 2188 /* get a frame */
2f51d00f 2189 timestamp = ktime_to_timeval(ktime_get());
63eb9546 2190 timestamp.tv_sec--;
82643d0e
JFM		 2191 n = 2;
2192 for (;;) {
63eb9546
JFM		 2193 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2194 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2195 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2196 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2197 if (ret != 0) {
2198 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2199 return ret;
2200 }
2201
2202 /* if the process slept for more than 1 second,
219423c1 2203 * get a newer frame */
63eb9546 2204 frame = &gspca_dev->frame[v4l2_buf.index];
82643d0e
JFM		 2205 if (--n < 0)
2206 break; /* avoid infinite loop */
63eb9546
JFM		 2207 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2208 break;
2209 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2210 if (ret != 0) {
2211 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2212 return ret;
2213 }
2214 }
2215
2216 /* copy the frame */
ac0d6df6
JFM		 2217 if (count > frame->v4l2_buf.bytesused)
2218 count = frame->v4l2_buf.bytesused;
63eb9546
JFM		 2219 ret = copy_to_user(data, frame->data, count);
2220 if (ret != 0) {
2221 PDEBUG(D_ERR|D_STREAM,
a9e11134 2222 "read cp to user lack %d / %zd", ret, count);
63eb9546
JFM		 2223 ret = -EFAULT;
2224 goto out;
2225 }
2226 ret = count;
2227out:
2228 /* in each case, requeue the buffer */
2229 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2230 if (ret2 != 0)
2231 return ret2;
2232 return ret;
2233}
2234
bec43661 2235static struct v4l2_file_operations dev_fops = {
63eb9546
JFM		 2236 .owner = THIS_MODULE,
2237 .open = dev_open,
2238 .release = dev_close,
2239 .read = dev_read,
2240 .mmap = dev_mmap,
bec43661 2241 .unlocked_ioctl = video_ioctl2,
63eb9546
JFM		 2242 .poll = dev_poll,
2243};
2244
a399810c 2245static const struct v4l2_ioctl_ops dev_ioctl_ops = {
63eb9546
JFM		 2246 .vidioc_querycap = vidioc_querycap,
2247 .vidioc_dqbuf = vidioc_dqbuf,
2248 .vidioc_qbuf = vidioc_qbuf,
e078770a
MCC		 2249 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2250 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2251 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2252 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
63eb9546
JFM		 2253 .vidioc_streamon = vidioc_streamon,
2254 .vidioc_queryctrl = vidioc_queryctrl,
2255 .vidioc_g_ctrl = vidioc_g_ctrl,
2256 .vidioc_s_ctrl = vidioc_s_ctrl,
2257 .vidioc_querymenu = vidioc_querymenu,
2258 .vidioc_enum_input = vidioc_enum_input,
2259 .vidioc_g_input = vidioc_g_input,
2260 .vidioc_s_input = vidioc_s_input,
2261 .vidioc_reqbufs = vidioc_reqbufs,
2262 .vidioc_querybuf = vidioc_querybuf,
2263 .vidioc_streamoff = vidioc_streamoff,
2264 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2265 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2266 .vidioc_g_parm = vidioc_g_parm,
2267 .vidioc_s_parm = vidioc_s_parm,
11c635a2 2268 .vidioc_enum_framesizes = vidioc_enum_framesizes,
28ffe77f 2269 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
af1d9afa
BJ		 2270#ifdef CONFIG_VIDEO_ADV_DEBUG
2271 .vidioc_g_register = vidioc_g_register,
2272 .vidioc_s_register = vidioc_s_register,
2273#endif
2274 .vidioc_g_chip_ident = vidioc_g_chip_ident,
d57fb9f8
HV		 2275 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2276 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
63eb9546
JFM		 2277};
2278
59929cef 2279static const struct video_device gspca_template = {
a399810c 2280 .name = "gspca main driver",
a399810c
HV		 2281 .fops = &dev_fops,
2282 .ioctl_ops = &dev_ioctl_ops,
d0182306 2283 .release = gspca_release,
a399810c
HV		 2284};
2285
6a33091f
JFM		 2286/* initialize the controls */
2287static void ctrls_init(struct gspca_dev *gspca_dev)
2288{
2289 struct gspca_ctrl *ctrl;
2290 int i;
2291
2292 for (i = 0, ctrl = gspca_dev->cam.ctrls;
2293 i < gspca_dev->sd_desc->nctrls;
2294 i++, ctrl++) {
2295 ctrl->def = gspca_dev->sd_desc->ctrls[i].qctrl.default_value;
2296 ctrl->val = ctrl->def;
2297 ctrl->min = gspca_dev->sd_desc->ctrls[i].qctrl.minimum;
2298 ctrl->max = gspca_dev->sd_desc->ctrls[i].qctrl.maximum;
2299 }
2300}
2301
63eb9546
JFM		 2302/*
2303 * probe and create a new gspca device
2304 *
2305 * This function must be called by the sub-driver when it is
2306 * called for probing a new device.
2307 */
4462864d 2308int gspca_dev_probe2(struct usb_interface *intf,
63eb9546
JFM		 2309 const struct usb_device_id *id,
2310 const struct sd_desc *sd_desc,
d43fa32f
JFM		 2311 int dev_size,
2312 struct module *module)
63eb9546 2313{
63eb9546
JFM		 2314 struct gspca_dev *gspca_dev;
2315 struct usb_device *dev = interface_to_usbdev(intf);
2316 int ret;
63eb9546 2317
ee7dd4e0
JFM		 2318 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
2319 sd_desc->name, id->idVendor, id->idProduct);
63eb9546 2320
63eb9546
JFM		 2321 /* create the device */
2322 if (dev_size < sizeof *gspca_dev)
2323 dev_size = sizeof *gspca_dev;
2324 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
e293e599 2325 if (!gspca_dev) {
133a9fe9 2326 pr_err("couldn't kzalloc gspca struct\n");
e293e599 2327 return -ENOMEM;
63eb9546 2328 }
8295d99e
JFM		 2329 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2330 if (!gspca_dev->usb_buf) {
133a9fe9 2331 pr_err("out of memory\n");
e293e599 2332 ret = -ENOMEM;
8295d99e
JFM		 2333 goto out;
2334 }
63eb9546 2335 gspca_dev->dev = dev;
4462864d 2336 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
35680baa
JFM		 2337
2338 /* check if any audio device */
5dae603d 2339 if (dev->actconfig->desc.bNumInterfaces != 1) {
35680baa
JFM		 2340 int i;
2341 struct usb_interface *intf2;
2342
5dae603d
HG		 2343 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
2344 intf2 = dev->actconfig->interface[i];
35680baa
JFM		 2345 if (intf2 != NULL
2346 && intf2->altsetting != NULL
2347 && intf2->altsetting->desc.bInterfaceClass ==
2348 USB_CLASS_AUDIO) {
2349 gspca_dev->audio = 1;
2350 break;
2351 }
2352 }
2353 }
2354
2333565d
HV		 2355 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
2356 if (ret)
2357 goto out;
63eb9546 2358 gspca_dev->sd_desc = sd_desc;
63eb9546 2359 gspca_dev->nbufread = 2;
ff374747 2360 gspca_dev->empty_packet = -1; /* don't check the empty packets */
62bba5dd 2361 gspca_dev->vdev = gspca_template;
2333565d 2362 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
f4c1605a 2363 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
2333565d 2364 set_bit(V4L2_FL_USE_FH_PRIO, &gspca_dev->vdev.flags);
62bba5dd
HV		 2365 gspca_dev->module = module;
2366 gspca_dev->present = 1;
2367
2368 mutex_init(&gspca_dev->usb_lock);
2369 mutex_init(&gspca_dev->queue_lock);
2370 init_waitqueue_head(&gspca_dev->wq);
63eb9546 2371
012d6b02 2372 /* configure the subdriver and initialize the USB device */
ba38ee8e 2373 ret = sd_desc->config(gspca_dev, id);
012d6b02
JFM		 2374 if (ret < 0)
2375 goto out;
6a33091f
JFM		 2376 if (gspca_dev->cam.ctrls != NULL)
2377 ctrls_init(gspca_dev);
ba38ee8e 2378 ret = sd_desc->init(gspca_dev);
62bba5dd
HV		 2379 if (ret < 0)
2380 goto out;
2381 if (sd_desc->init_controls)
2382 ret = sd_desc->init_controls(gspca_dev);
63eb9546
JFM		 2383 if (ret < 0)
2384 goto out;
2385 gspca_set_default_mode(gspca_dev);
2386
10ee2402
HG		 2387 ret = gspca_input_connect(gspca_dev);
2388 if (ret)
2389 goto out;
2390
63eb9546 2391 /* init video stuff */
a12ca6a6 2392 ret = video_register_device(&gspca_dev->vdev,
63eb9546 2393 VFL_TYPE_GRABBER,
8d584a53 2394 -1);
63eb9546 2395 if (ret < 0) {
133a9fe9 2396 pr_err("video_register_device err %d\n", ret);
63eb9546
JFM		 2397 goto out;
2398 }
2399
63eb9546 2400 usb_set_intfdata(intf, gspca_dev);
38c7c036 2401 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
0274d42e 2402
10ee2402 2403 gspca_input_create_urb(gspca_dev);
0274d42e 2404
63eb9546
JFM		 2405 return 0;
2406out:
f7628015 2407#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
10ee2402
HG		 2408 if (gspca_dev->input_dev)
2409 input_unregister_device(gspca_dev->input_dev);
e7637521 2410#endif
62bba5dd 2411 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
e07a1d8a
JFM		 2412 kfree(gspca_dev->usb_buf);
2413 kfree(gspca_dev);
63eb9546
JFM		 2414 return ret;
2415}
4462864d
JFM		 2416EXPORT_SYMBOL(gspca_dev_probe2);
2417
2418/* same function as the previous one, but check the interface */
2419int gspca_dev_probe(struct usb_interface *intf,
2420 const struct usb_device_id *id,
2421 const struct sd_desc *sd_desc,
2422 int dev_size,
2423 struct module *module)
2424{
2425 struct usb_device *dev = interface_to_usbdev(intf);
2426
2427 /* we don't handle multi-config cameras */
2428 if (dev->descriptor.bNumConfigurations != 1) {
133a9fe9
JP		 2429 pr_err("%04x:%04x too many config\n",
2430 id->idVendor, id->idProduct);
4462864d
JFM		 2431 return -ENODEV;
2432 }
2433
2434 /* the USB video interface must be the first one */
5dae603d 2435 if (dev->actconfig->desc.bNumInterfaces != 1
c4dc692c 2436 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
4462864d 2437 return -ENODEV;
4462864d
JFM		 2438
2439 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
2440}
63eb9546
JFM		 2441EXPORT_SYMBOL(gspca_dev_probe);
2442
2443/*
2444 * USB disconnection
2445 *
2446 * This function must be called by the sub-driver
2447 * when the device disconnects, after the specific resources are freed.
2448 */
2449void gspca_disconnect(struct usb_interface *intf)
2450{
4aa0d037 2451 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
f7628015 2452#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e 2453 struct input_dev *input_dev;
e070bf9e 2454#endif
63eb9546 2455
38c7c036
LP		 2456 PDEBUG(D_PROBE, "%s disconnect",
2457 video_device_node_name(&gspca_dev->vdev));
ad28127d 2458 mutex_lock(&gspca_dev->usb_lock);
4e770f76 2459
6e4ae872 2460 gspca_dev->present = 0;
4e770f76 2461 wake_up_interruptible(&gspca_dev->wq);
6e4ae872 2462
4e770f76 2463 destroy_urbs(gspca_dev);
090264e5 2464
f7628015 2465#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 2466 gspca_input_destroy_urb(gspca_dev);
2467 input_dev = gspca_dev->input_dev;
2468 if (input_dev) {
2469 gspca_dev->input_dev = NULL;
2470 input_unregister_device(input_dev);
2471 }
e070bf9e 2472#endif
0274d42e 2473
090264e5 2474 /* the device is freed at exit of this function */
ad28127d 2475 gspca_dev->dev = NULL;
2333565d 2476 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
090264e5
JFM		 2477 mutex_unlock(&gspca_dev->usb_lock);
2478
6b060ffe
FZ		 2479 usb_set_intfdata(intf, NULL);
2480
a12ca6a6 2481 /* release the device */
25985edc 2482 /* (this will call gspca_release() immediately or on last close) */
a12ca6a6 2483 video_unregister_device(&gspca_dev->vdev);
3145b8c1 2484
0d07e240 2485/* PDEBUG(D_PROBE, "disconnect complete"); */
63eb9546
JFM		 2486}
2487EXPORT_SYMBOL(gspca_disconnect);
2488
6a709749
JFM		 2489#ifdef CONFIG_PM
2490int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2491{
2492 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2493
2494 if (!gspca_dev->streaming)
2495 return 0;
2496 gspca_dev->frozen = 1; /* avoid urb error messages */
012d6b02
JFM		 2497 if (gspca_dev->sd_desc->stopN)
2498 gspca_dev->sd_desc->stopN(gspca_dev);
6a709749 2499 destroy_urbs(gspca_dev);
0274d42e 2500 gspca_input_destroy_urb(gspca_dev);
6a709749 2501 gspca_set_alt0(gspca_dev);
254902b0
HV		 2502 if (gspca_dev->sd_desc->stop0) {
2503 mutex_lock(&gspca_dev->usb_lock);
012d6b02 2504 gspca_dev->sd_desc->stop0(gspca_dev);
254902b0
HV		 2505 mutex_unlock(&gspca_dev->usb_lock);
2506 }
6a709749
JFM		 2507 return 0;
2508}
2509EXPORT_SYMBOL(gspca_suspend);
2510
2511int gspca_resume(struct usb_interface *intf)
2512{
2513 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
254902b0 2514 int streaming, ret = 0;
6a709749
JFM		 2515
2516 gspca_dev->frozen = 0;
012d6b02 2517 gspca_dev->sd_desc->init(gspca_dev);
0274d42e 2518 gspca_input_create_urb(gspca_dev);
62bba5dd
HV		 2519 /*
2520 * Most subdrivers send all ctrl values on sd_start and thus
2521 * only write to the device registers on s_ctrl when streaming ->
2522 * Clear streaming to avoid setting all ctrls twice.
2523 */
2524 streaming = gspca_dev->streaming;
2525 gspca_dev->streaming = 0;
2526 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
254902b0
HV		 2527 if (streaming) {
2528 mutex_lock(&gspca_dev->queue_lock);
2529 ret = gspca_init_transfer(gspca_dev);
2530 mutex_unlock(&gspca_dev->queue_lock);
2531 }
2532 return ret;
6a709749
JFM		 2533}
2534EXPORT_SYMBOL(gspca_resume);
2535#endif
dcef3237
HG		 2536/* -- cam driver utility functions -- */
2537
2538/* auto gain and exposure algorithm based on the knee algorithm described here:
2539 http://ytse.tricolour.net/docs/LowLightOptimization.html
2540
2541 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2542 where changed. */
2543int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2544 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2545{
2546 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2547 const struct ctrl *gain_ctrl = NULL;
2548 const struct ctrl *exposure_ctrl = NULL;
2549 const struct ctrl *autogain_ctrl = NULL;
2550 int retval = 0;
2551
2552 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
26984b09
HG		 2553 if (gspca_dev->ctrl_dis & (1 << i))
2554 continue;
dcef3237
HG		 2555 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2556 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2557 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2558 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2559 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2560 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2561 }
2562 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2563 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2564 "on cam without (auto)gain/exposure");
2565 return 0;
2566 }
2567
2568 if (gain_ctrl->get(gspca_dev, &gain) ||
2569 exposure_ctrl->get(gspca_dev, &exposure) ||
2570 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2571 return 0;
2572
2573 orig_gain = gain;
2574 orig_exposure = exposure;
2575
2576 /* If we are of a multiple of deadzone, do multiple steps to reach the
2577 desired lumination fast (with the risc of a slight overshoot) */
2578 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2579
1c44d81d 2580 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
dcef3237
HG		 2581 avg_lum, desired_avg_lum, steps);
2582
2583 for (i = 0; i < steps; i++) {
2584 if (avg_lum > desired_avg_lum) {
2585 if (gain > gain_knee)
2586 gain--;
2587 else if (exposure > exposure_knee)
2588 exposure--;
2589 else if (gain > gain_ctrl->qctrl.default_value)
2590 gain--;
2591 else if (exposure > exposure_ctrl->qctrl.minimum)
2592 exposure--;
2593 else if (gain > gain_ctrl->qctrl.minimum)
2594 gain--;
2595 else
2596 break;
2597 } else {
2598 if (gain < gain_ctrl->qctrl.default_value)
2599 gain++;
2600 else if (exposure < exposure_knee)
2601 exposure++;
2602 else if (gain < gain_knee)
2603 gain++;
2604 else if (exposure < exposure_ctrl->qctrl.maximum)
2605 exposure++;
2606 else if (gain < gain_ctrl->qctrl.maximum)
2607 gain++;
2608 else
2609 break;
2610 }
2611 }
2612
2613 if (gain != orig_gain) {
2614 gain_ctrl->set(gspca_dev, gain);
2615 retval = 1;
2616 }
2617 if (exposure != orig_exposure) {
2618 exposure_ctrl->set(gspca_dev, exposure);
2619 retval = 1;
2620 }
2621
2622 return retval;
2623}
2624EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2625
63eb9546
JFM		 2626/* -- module insert / remove -- */
2627static int __init gspca_init(void)
2628{
f22123fa 2629 pr_info("v" GSPCA_VERSION " registered\n");
63eb9546
JFM		 2630 return 0;
2631}
2632static void __exit gspca_exit(void)
2633{
63eb9546
JFM		 2634}
2635
2636module_init(gspca_init);
2637module_exit(gspca_exit);
2638
335b3f88 2639#ifdef GSPCA_DEBUG
63eb9546
JFM		 2640module_param_named(debug, gspca_debug, int, 0644);
2641MODULE_PARM_DESC(debug,
2642 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
f8e5677f 2643 " 0x08:stream 0x10:frame 0x20:packet"
d43fa32f 2644 " 0x0100: v4l2");
6a7eba24 2645#endif
Linux kernel - Deliverables
This page took 0.593887 seconds and 5 git commands to generate.