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[media] gscpa: Use v4l2_fh and add G/S_PRIORITY support
[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>
63eb9546
JFM		 43
44#include "gspca.h"
45
f7628015 46#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 47#include <linux/input.h>
48#include <linux/usb/input.h>
e070bf9e 49#endif
0274d42e 50
d43fa32f 51/* global values */
8fee8453
JFM		 52#define DEF_NURBS 3 /* default number of URBs */
53#if DEF_NURBS > MAX_NURBS
54#error "DEF_NURBS too big"
55#endif
d43fa32f 56
27c6f9e5 57MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
63eb9546
JFM		 58MODULE_DESCRIPTION("GSPCA USB Camera Driver");
59MODULE_LICENSE("GPL");
f22123fa 60MODULE_VERSION(GSPCA_VERSION);
63eb9546 61
335b3f88 62#ifdef GSPCA_DEBUG
63eb9546
JFM		 63int gspca_debug = D_ERR | D_PROBE;
64EXPORT_SYMBOL(gspca_debug);
65
66static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h)
67{
68 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
69 PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d",
70 txt,
71 pixfmt & 0xff,
72 (pixfmt >> 8) & 0xff,
73 (pixfmt >> 16) & 0xff,
74 pixfmt >> 24,
75 w, h);
76 } else {
77 PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d",
78 txt,
79 pixfmt,
80 w, h);
81 }
82}
83#else
84#define PDEBUG_MODE(txt, pixfmt, w, h)
85#endif
86
77ee3318 87/* specific memory types - !! should be different from V4L2_MEMORY_xxx */
d43fa32f
JFM		 88#define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
89#define GSPCA_MEMORY_READ 7
90
d43fa32f 91#define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
d43fa32f 92
63eb9546
JFM		 93/*
94 * VMA operations.
95 */
96static void gspca_vm_open(struct vm_area_struct *vma)
97{
98 struct gspca_frame *frame = vma->vm_private_data;
99
100 frame->vma_use_count++;
101 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
102}
103
104static void gspca_vm_close(struct vm_area_struct *vma)
105{
106 struct gspca_frame *frame = vma->vm_private_data;
107
108 if (--frame->vma_use_count <= 0)
109 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
110}
111
f0f37e2f 112static const struct vm_operations_struct gspca_vm_ops = {
63eb9546
JFM		 113 .open = gspca_vm_open,
114 .close = gspca_vm_close,
115};
116
0274d42e
MN		 117/*
118 * Input and interrupt endpoint handling functions
119 */
f7628015 120#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 121static void int_irq(struct urb *urb)
122{
123 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
124 int ret;
125
126 ret = urb->status;
127 switch (ret) {
128 case 0:
129 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
130 urb->transfer_buffer, urb->actual_length) < 0) {
131 PDEBUG(D_ERR, "Unknown packet received");
132 }
133 break;
134
135 case -ENOENT:
136 case -ECONNRESET:
137 case -ENODEV:
138 case -ESHUTDOWN:
139 /* Stop is requested either by software or hardware is gone,
140 * keep the ret value non-zero and don't resubmit later.
141 */
142 break;
143
144 default:
145 PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status);
146 urb->status = 0;
147 ret = 0;
148 }
149
150 if (ret == 0) {
151 ret = usb_submit_urb(urb, GFP_ATOMIC);
152 if (ret < 0)
133a9fe9 153 pr_err("Resubmit URB failed with error %i\n", ret);
0274d42e
MN		 154 }
155}
156
157static int gspca_input_connect(struct gspca_dev *dev)
158{
159 struct input_dev *input_dev;
160 int err = 0;
161
162 dev->input_dev = NULL;
ac82f59f 163 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
0274d42e
MN		 164 input_dev = input_allocate_device();
165 if (!input_dev)
166 return -ENOMEM;
167
168 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
169 strlcat(dev->phys, "/input0", sizeof(dev->phys));
170
171 input_dev->name = dev->sd_desc->name;
172 input_dev->phys = dev->phys;
173
174 usb_to_input_id(dev->dev, &input_dev->id);
175
176 input_dev->evbit[0] = BIT_MASK(EV_KEY);
177 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
178 input_dev->dev.parent = &dev->dev->dev;
179
180 err = input_register_device(input_dev);
181 if (err) {
133a9fe9
JP		 182 pr_err("Input device registration failed with error %i\n",
183 err);
0274d42e
MN		 184 input_dev->dev.parent = NULL;
185 input_free_device(input_dev);
186 } else {
187 dev->input_dev = input_dev;
188 }
10ee2402 189 }
0274d42e
MN		 190
191 return err;
192}
193
194static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
195 struct usb_endpoint_descriptor *ep)
196{
197 unsigned int buffer_len;
198 int interval;
199 struct urb *urb;
200 struct usb_device *dev;
201 void *buffer = NULL;
202 int ret = -EINVAL;
203
b26d6e21 204 buffer_len = le16_to_cpu(ep->wMaxPacketSize);
0274d42e 205 interval = ep->bInterval;
c4dc692c 206 PDEBUG(D_CONF, "found int in endpoint: 0x%x, "
0274d42e
MN		 207 "buffer_len=%u, interval=%u",
208 ep->bEndpointAddress, buffer_len, interval);
209
210 dev = gspca_dev->dev;
211
212 urb = usb_alloc_urb(0, GFP_KERNEL);
213 if (!urb) {
214 ret = -ENOMEM;
215 goto error;
216 }
217
7a9b1492 218 buffer = usb_alloc_coherent(dev, buffer_len,
0274d42e
MN		 219 GFP_KERNEL, &urb->transfer_dma);
220 if (!buffer) {
221 ret = -ENOMEM;
222 goto error_buffer;
223 }
224 usb_fill_int_urb(urb, dev,
225 usb_rcvintpipe(dev, ep->bEndpointAddress),
226 buffer, buffer_len,
227 int_irq, (void *)gspca_dev, interval);
882787ff 228 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
0274d42e
MN		 229 ret = usb_submit_urb(urb, GFP_KERNEL);
230 if (ret < 0) {
c4dc692c 231 PDEBUG(D_ERR, "submit int URB failed with error %i", ret);
0274d42e
MN		 232 goto error_submit;
233 }
2661da47 234 gspca_dev->int_urb = urb;
0274d42e
MN		 235 return ret;
236
237error_submit:
997ea58e
DM		 238 usb_free_coherent(dev,
239 urb->transfer_buffer_length,
240 urb->transfer_buffer,
241 urb->transfer_dma);
0274d42e
MN		 242error_buffer:
243 usb_free_urb(urb);
244error:
245 return ret;
246}
247
10ee2402 248static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
0274d42e 249{
0274d42e
MN		 250 struct usb_interface *intf;
251 struct usb_host_interface *intf_desc;
252 struct usb_endpoint_descriptor *ep;
253 int i;
254
255 if (gspca_dev->sd_desc->int_pkt_scan) {
256 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
257 intf_desc = intf->cur_altsetting;
258 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
259 ep = &intf_desc->endpoint[i].desc;
260 if (usb_endpoint_dir_in(ep) &&
261 usb_endpoint_xfer_int(ep)) {
262
10ee2402 263 alloc_and_submit_int_urb(gspca_dev, ep);
0274d42e
MN		 264 break;
265 }
266 }
267 }
0274d42e
MN		 268}
269
270static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
271{
272 struct urb *urb;
273
274 urb = gspca_dev->int_urb;
275 if (urb) {
276 gspca_dev->int_urb = NULL;
277 usb_kill_urb(urb);
997ea58e
DM		 278 usb_free_coherent(gspca_dev->dev,
279 urb->transfer_buffer_length,
280 urb->transfer_buffer,
281 urb->transfer_dma);
0274d42e
MN		 282 usb_free_urb(urb);
283 }
284}
f7628015
RD		 285#else
286static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
287{
288}
289
290static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
291{
292}
293
294static inline int gspca_input_connect(struct gspca_dev *dev)
295{
296 return 0;
297}
0274d42e
MN		 298#endif
299
63eb9546 300/*
d43fa32f 301 * fill a video frame from an URB and resubmit
63eb9546 302 */
d43fa32f
JFM		 303static void fill_frame(struct gspca_dev *gspca_dev,
304 struct urb *urb)
63eb9546 305{
8d584a53 306 u8 *data; /* address of data in the iso message */
1b60e1ad 307 int i, len, st;
63eb9546
JFM		 308 cam_pkt_op pkt_scan;
309
6a7eba24 310 if (urb->status != 0) {
090264e5
JFM		 311 if (urb->status == -ESHUTDOWN)
312 return; /* disconnection */
62ee8eee 313#ifdef CONFIG_PM
6a540bdf
HG		 314 if (gspca_dev->frozen)
315 return;
62ee8eee 316#endif
6a540bdf 317 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
8157852f 318 urb->status = 0;
bf926adf 319 goto resubmit;
6a7eba24 320 }
63eb9546
JFM		 321 pkt_scan = gspca_dev->sd_desc->pkt_scan;
322 for (i = 0; i < urb->number_of_packets; i++) {
95f18be2 323 len = urb->iso_frame_desc[i].actual_length;
63eb9546 324
63eb9546 325 /* check the packet status and length */
63eb9546
JFM		 326 st = urb->iso_frame_desc[i].status;
327 if (st) {
133a9fe9
JP		 328 pr_err("ISOC data error: [%d] len=%d, status=%d\n",
329 i, len, st);
63eb9546
JFM		 330 gspca_dev->last_packet_type = DISCARD_PACKET;
331 continue;
332 }
76ebc16b
JFM		 333 if (len == 0) {
334 if (gspca_dev->empty_packet == 0)
335 gspca_dev->empty_packet = 1;
336 continue;
337 }
63eb9546
JFM		 338
339 /* let the packet be analyzed by the subdriver */
340 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
341 i, urb->iso_frame_desc[i].offset, len);
8d584a53 342 data = (u8 *) urb->transfer_buffer
63eb9546 343 + urb->iso_frame_desc[i].offset;
76dd272b 344 pkt_scan(gspca_dev, data, len);
63eb9546
JFM		 345 }
346
bf926adf 347resubmit:
63eb9546 348 /* resubmit the URB */
63eb9546
JFM		 349 st = usb_submit_urb(urb, GFP_ATOMIC);
350 if (st < 0)
133a9fe9 351 pr_err("usb_submit_urb() ret %d\n", st);
63eb9546
JFM		 352}
353
d43fa32f
JFM		 354/*
355 * ISOC message interrupt from the USB device
356 *
ac0d6df6 357 * Analyse each packet and call the subdriver for copy to the frame buffer.
d43fa32f 358 */
8d584a53 359static void isoc_irq(struct urb *urb)
d43fa32f
JFM		 360{
361 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
362
3647fea8 363 PDEBUG(D_PACK, "isoc irq");
d43fa32f
JFM		 364 if (!gspca_dev->streaming)
365 return;
366 fill_frame(gspca_dev, urb);
367}
368
0be01004
JFM		 369/*
370 * bulk message interrupt from the USB device
371 */
8d584a53 372static void bulk_irq(struct urb *urb)
0be01004
JFM		 373{
374 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
dff369aa 375 int st;
0be01004
JFM		 376
377 PDEBUG(D_PACK, "bulk irq");
378 if (!gspca_dev->streaming)
379 return;
880ae24d
JFM		 380 switch (urb->status) {
381 case 0:
382 break;
090264e5
JFM		 383 case -ESHUTDOWN:
384 return; /* disconnection */
880ae24d 385 default:
0be01004 386#ifdef CONFIG_PM
6a540bdf
HG		 387 if (gspca_dev->frozen)
388 return;
0be01004 389#endif
6a540bdf 390 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
8157852f 391 urb->status = 0;
bf926adf 392 goto resubmit;
0be01004
JFM		 393 }
394
d131c3c9
JFM		 395 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
396 gspca_dev->sd_desc->pkt_scan(gspca_dev,
d131c3c9
JFM		 397 urb->transfer_buffer,
398 urb->actual_length);
dff369aa 399
bf926adf 400resubmit:
dff369aa
AO		 401 /* resubmit the URB */
402 if (gspca_dev->cam.bulk_nurbs != 0) {
403 st = usb_submit_urb(urb, GFP_ATOMIC);
404 if (st < 0)
133a9fe9 405 pr_err("usb_submit_urb() ret %d\n", st);
dff369aa 406 }
0be01004
JFM		 407}
408
63eb9546
JFM		 409/*
410 * add data to the current frame
411 *
ac0d6df6
JFM		 412 * This function is called by the subdrivers at interrupt level.
413 *
63eb9546
JFM		 414 * To build a frame, these ones must add
415 * - one FIRST_PACKET
416 * - 0 or many INTER_PACKETs
417 * - one LAST_PACKET
418 * DISCARD_PACKET invalidates the whole frame.
63eb9546 419 */
76dd272b
JFM		 420void gspca_frame_add(struct gspca_dev *gspca_dev,
421 enum gspca_packet_type packet_type,
422 const u8 *data,
423 int len)
63eb9546 424{
3ec342f2 425 struct gspca_frame *frame;
63eb9546
JFM		 426 int i, j;
427
e2997a72 428 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
d131c3c9 429
63eb9546 430 if (packet_type == FIRST_PACKET) {
f7059eaa
JFM		 431 i = atomic_read(&gspca_dev->fr_i);
432
433 /* if there are no queued buffer, discard the whole frame */
434 if (i == atomic_read(&gspca_dev->fr_q)) {
435 gspca_dev->last_packet_type = DISCARD_PACKET;
2e0544a8 436 gspca_dev->sequence++;
f7059eaa
JFM		 437 return;
438 }
b192ca98
JFM		 439 j = gspca_dev->fr_queue[i];
440 frame = &gspca_dev->frame[j];
2f51d00f 441 frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
2e0544a8 442 frame->v4l2_buf.sequence = gspca_dev->sequence++;
f7059eaa 443 gspca_dev->image = frame->data;
b192ca98 444 gspca_dev->image_len = 0;
fe988f56
JFM		 445 } else {
446 switch (gspca_dev->last_packet_type) {
447 case DISCARD_PACKET:
fa4376d2 448 if (packet_type == LAST_PACKET) {
fe988f56 449 gspca_dev->last_packet_type = packet_type;
fa4376d2
HG		 450 gspca_dev->image = NULL;
451 gspca_dev->image_len = 0;
452 }
fe988f56
JFM		 453 return;
454 case LAST_PACKET:
455 return;
456 }
d43fa32f 457 }
63eb9546 458
d43fa32f 459 /* append the packet to the frame buffer */
63eb9546 460 if (len > 0) {
b192ca98
JFM		 461 if (gspca_dev->image_len + len > gspca_dev->frsz) {
462 PDEBUG(D_ERR|D_PACK, "frame overflow %d > %d",
463 gspca_dev->image_len + len,
464 gspca_dev->frsz);
63eb9546
JFM		 465 packet_type = DISCARD_PACKET;
466 } else {
fe988f56
JFM		 467/* !! image is NULL only when last pkt is LAST or DISCARD
468 if (gspca_dev->image == NULL) {
133a9fe9 469 pr_err("gspca_frame_add() image == NULL\n");
fe988f56
JFM		 470 return;
471 }
472 */
b192ca98
JFM		 473 memcpy(gspca_dev->image + gspca_dev->image_len,
474 data, len);
475 gspca_dev->image_len += len;
63eb9546
JFM		 476 }
477 }
478 gspca_dev->last_packet_type = packet_type;
479
f7059eaa
JFM		 480 /* if last packet, invalidate packet concatenation until
481 * next first packet, wake up the application and advance
482 * in the queue */
63eb9546 483 if (packet_type == LAST_PACKET) {
f7059eaa 484 i = atomic_read(&gspca_dev->fr_i);
b192ca98
JFM		 485 j = gspca_dev->fr_queue[i];
486 frame = &gspca_dev->frame[j];
487 frame->v4l2_buf.bytesused = gspca_dev->image_len;
02bbcb9d
JFM		 488 frame->v4l2_buf.flags = (frame->v4l2_buf.flags
489 | V4L2_BUF_FLAG_DONE)
490 & ~V4L2_BUF_FLAG_QUEUED;
f7059eaa
JFM		 491 i = (i + 1) % GSPCA_MAX_FRAMES;
492 atomic_set(&gspca_dev->fr_i, i);
63eb9546 493 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
f7059eaa
JFM		 494 PDEBUG(D_FRAM, "frame complete len:%d",
495 frame->v4l2_buf.bytesused);
496 gspca_dev->image = NULL;
497 gspca_dev->image_len = 0;
63eb9546 498 }
63eb9546
JFM		 499}
500EXPORT_SYMBOL(gspca_frame_add);
501
d642de2e
HG		 502static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file,
503 enum v4l2_memory memory, unsigned int count)
63eb9546 504{
d43fa32f
JFM		 505 struct gspca_frame *frame;
506 unsigned int frsz;
507 int i;
63eb9546 508
c2446b3e
JFM		 509 i = gspca_dev->curr_mode;
510 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
63eb9546 511 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
63eb9546 512 frsz = PAGE_ALIGN(frsz);
f7059eaa
JFM		 513 if (count >= GSPCA_MAX_FRAMES)
514 count = GSPCA_MAX_FRAMES - 1;
e795d912 515 gspca_dev->frbuf = vmalloc_32(frsz * count);
ac0d6df6 516 if (!gspca_dev->frbuf) {
133a9fe9 517 pr_err("frame alloc failed\n");
ac0d6df6 518 return -ENOMEM;
63eb9546 519 }
d642de2e
HG		 520 gspca_dev->capt_file = file;
521 gspca_dev->memory = memory;
522 gspca_dev->frsz = frsz;
63eb9546
JFM		 523 gspca_dev->nframes = count;
524 for (i = 0; i < count; i++) {
d43fa32f
JFM		 525 frame = &gspca_dev->frame[i];
526 frame->v4l2_buf.index = i;
527 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
528 frame->v4l2_buf.flags = 0;
529 frame->v4l2_buf.field = V4L2_FIELD_NONE;
530 frame->v4l2_buf.length = frsz;
d642de2e 531 frame->v4l2_buf.memory = memory;
d43fa32f 532 frame->v4l2_buf.sequence = 0;
b192ca98 533 frame->data = gspca_dev->frbuf + i * frsz;
ac0d6df6 534 frame->v4l2_buf.m.offset = i * frsz;
63eb9546 535 }
f7059eaa
JFM		 536 atomic_set(&gspca_dev->fr_q, 0);
537 atomic_set(&gspca_dev->fr_i, 0);
538 gspca_dev->fr_o = 0;
d43fa32f 539 return 0;
63eb9546
JFM		 540}
541
542static void frame_free(struct gspca_dev *gspca_dev)
543{
544 int i;
545
546 PDEBUG(D_STREAM, "frame free");
efab8211 547 if (gspca_dev->frbuf != NULL) {
e795d912 548 vfree(gspca_dev->frbuf);
63eb9546
JFM		 549 gspca_dev->frbuf = NULL;
550 for (i = 0; i < gspca_dev->nframes; i++)
551 gspca_dev->frame[i].data = NULL;
552 }
553 gspca_dev->nframes = 0;
d642de2e
HG		 554 gspca_dev->frsz = 0;
555 gspca_dev->capt_file = NULL;
556 gspca_dev->memory = GSPCA_MEMORY_NO;
63eb9546
JFM		 557}
558
d43fa32f 559static void destroy_urbs(struct gspca_dev *gspca_dev)
63eb9546
JFM		 560{
561 struct urb *urb;
562 unsigned int i;
563
564 PDEBUG(D_STREAM, "kill transfer");
44732819 565 for (i = 0; i < MAX_NURBS; i++) {
4aa0d037 566 urb = gspca_dev->urb[i];
63eb9546 567 if (urb == NULL)
d43fa32f 568 break;
63eb9546 569
4aa0d037 570 gspca_dev->urb[i] = NULL;
090264e5 571 usb_kill_urb(urb);
efab8211 572 if (urb->transfer_buffer != NULL)
997ea58e
DM		 573 usb_free_coherent(gspca_dev->dev,
574 urb->transfer_buffer_length,
575 urb->transfer_buffer,
576 urb->transfer_dma);
63eb9546
JFM		 577 usb_free_urb(urb);
578 }
63eb9546
JFM		 579}
580
e4dac289
JFM		 581static int gspca_set_alt0(struct gspca_dev *gspca_dev)
582{
583 int ret;
584
585 if (gspca_dev->alt == 0)
586 return 0;
587 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
588 if (ret < 0)
133a9fe9 589 pr_err("set alt 0 err %d\n", ret);
e4dac289
JFM		 590 return ret;
591}
592
593/* Note: both the queue and the usb locks should be held when calling this */
594static void gspca_stream_off(struct gspca_dev *gspca_dev)
595{
596 gspca_dev->streaming = 0;
597 if (gspca_dev->present) {
598 if (gspca_dev->sd_desc->stopN)
599 gspca_dev->sd_desc->stopN(gspca_dev);
600 destroy_urbs(gspca_dev);
601 gspca_input_destroy_urb(gspca_dev);
602 gspca_set_alt0(gspca_dev);
603 gspca_input_create_urb(gspca_dev);
604 }
605
606 /* always call stop0 to free the subdriver's resources */
607 if (gspca_dev->sd_desc->stop0)
608 gspca_dev->sd_desc->stop0(gspca_dev);
609 PDEBUG(D_STREAM, "stream off OK");
610}
611
63eb9546 612/*
219423c1 613 * look for an input transfer endpoint in an alternate setting
63eb9546 614 */
0be01004 615static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
6929dc6b 616 int xfer)
63eb9546
JFM		 617{
618 struct usb_host_endpoint *ep;
619 int i, attr;
620
63eb9546
JFM		 621 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
622 ep = &alt->endpoint[i];
50e06dee 623 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
30d35e49 624 if (attr == xfer
7106225a
PC		 625 && ep->desc.wMaxPacketSize != 0
626 && usb_endpoint_dir_in(&ep->desc))
50e06dee 627 return ep;
63eb9546
JFM		 628 }
629 return NULL;
630}
631
27b12023
JFM		 632/* compute the minimum bandwidth for the current transfer */
633static u32 which_bandwidth(struct gspca_dev *gspca_dev)
634{
635 u32 bandwidth;
636 int i;
637
18bef42c 638 /* get the (max) image size */
27b12023
JFM		 639 i = gspca_dev->curr_mode;
640 bandwidth = gspca_dev->cam.cam_mode[i].sizeimage;
641
18bef42c 642 /* if the image is compressed, estimate its mean size */
eb3fb7c9
HG		 643 if (!gspca_dev->cam.needs_full_bandwidth &&
644 bandwidth < gspca_dev->cam.cam_mode[i].width *
27b12023 645 gspca_dev->cam.cam_mode[i].height)
18bef42c 646 bandwidth = bandwidth * 3 / 8; /* 0.375 */
27b12023
JFM		 647
648 /* estimate the frame rate */
649 if (gspca_dev->sd_desc->get_streamparm) {
650 struct v4l2_streamparm parm;
651
27b12023
JFM		 652 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
653 bandwidth *= parm.parm.capture.timeperframe.denominator;
1153f04d 654 bandwidth /= parm.parm.capture.timeperframe.numerator;
27b12023 655 } else {
18bef42c
JFM		 656
657 /* don't hope more than 15 fps with USB 1.1 and
658 * image resolution >= 640x480 */
659 if (gspca_dev->width >= 640
660 && gspca_dev->dev->speed == USB_SPEED_FULL)
661 bandwidth *= 15; /* 15 fps */
662 else
663 bandwidth *= 30; /* 30 fps */
27b12023
JFM		 664 }
665
666 PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth);
667 return bandwidth;
668}
669
670/* endpoint table */
671#define MAX_ALT 16
672struct ep_tb_s {
673 u32 alt;
674 u32 bandwidth;
675};
676
63eb9546 677/*
27b12023
JFM		 678 * build the table of the endpoints
679 * and compute the minimum bandwidth for the image transfer
63eb9546 680 */
66957b86 681static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
27b12023 682 struct usb_interface *intf,
27b12023 683 struct ep_tb_s *ep_tb)
63eb9546 684{
63eb9546 685 struct usb_host_endpoint *ep;
27b12023
JFM		 686 int i, j, nbalt, psize, found;
687 u32 bandwidth, last_bw;
63eb9546 688
27b12023
JFM		 689 nbalt = intf->num_altsetting;
690 if (nbalt > MAX_ALT)
691 nbalt = MAX_ALT; /* fixme: should warn */
692
693 /* build the endpoint table */
694 i = 0;
695 last_bw = 0;
696 for (;;) {
697 ep_tb->bandwidth = 2000 * 2000 * 120;
698 found = 0;
699 for (j = 0; j < nbalt; j++) {
66957b86
HG		 700 ep = alt_xfer(&intf->altsetting[j],
701 USB_ENDPOINT_XFER_ISOC);
27b12023
JFM		 702 if (ep == NULL)
703 continue;
d0d3435b
HG		 704 if (ep->desc.bInterval == 0) {
705 pr_err("alt %d iso endp with 0 interval\n", j);
706 continue;
707 }
27b12023 708 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
66957b86 709 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
d0d3435b 710 bandwidth = psize * 1000;
27b12023
JFM		 711 if (gspca_dev->dev->speed == USB_SPEED_HIGH
712 || gspca_dev->dev->speed == USB_SPEED_SUPER)
713 bandwidth *= 8;
d0d3435b 714 bandwidth /= 1 << (ep->desc.bInterval - 1);
27b12023
JFM		 715 if (bandwidth <= last_bw)
716 continue;
717 if (bandwidth < ep_tb->bandwidth) {
718 ep_tb->bandwidth = bandwidth;
719 ep_tb->alt = j;
720 found = 1;
721 }
95d9142c 722 }
27b12023
JFM		 723 if (!found)
724 break;
725 PDEBUG(D_STREAM, "alt %d bandwidth %d",
726 ep_tb->alt, ep_tb->bandwidth);
727 last_bw = ep_tb->bandwidth;
728 i++;
729 ep_tb++;
730 }
731
2d39059a
HG		 732 /*
733 * If the camera:
734 * has a usb audio class interface (a built in usb mic); and
735 * is a usb 1 full speed device; and
736 * uses the max full speed iso bandwidth; and
737 * and has more than 1 alt setting
738 * then skip the highest alt setting to spare bandwidth for the mic
739 */
740 if (gspca_dev->audio &&
741 gspca_dev->dev->speed == USB_SPEED_FULL &&
742 last_bw >= 1000000 &&
743 i > 1) {
744 PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt");
745 i--;
746 ep_tb--;
747 }
748
27b12023
JFM		 749 /* get the requested bandwidth and start at the highest atlsetting */
750 bandwidth = which_bandwidth(gspca_dev);
751 ep_tb--;
752 while (i > 1) {
753 ep_tb--;
754 if (ep_tb->bandwidth < bandwidth)
755 break;
756 i--;
63eb9546 757 }
27b12023 758 return i;
63eb9546
JFM		 759}
760
761/*
0be01004 762 * create the URBs for image transfer
63eb9546
JFM		 763 */
764static int create_urbs(struct gspca_dev *gspca_dev,
765 struct usb_host_endpoint *ep)
766{
767 struct urb *urb;
d43fa32f 768 int n, nurbs, i, psize, npkt, bsize;
63eb9546
JFM		 769
770 /* calculate the packet size and the number of packets */
63eb9546 771 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
d43fa32f 772
6929dc6b 773 if (!gspca_dev->cam.bulk) { /* isoc */
95d9142c
JFM		 774
775 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
1f53b0b0
JFM		 776 if (gspca_dev->pkt_size == 0)
777 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
778 else
779 psize = gspca_dev->pkt_size;
49cb6b04
JFM		 780 npkt = gspca_dev->cam.npkt;
781 if (npkt == 0)
782 npkt = 32; /* default value */
0be01004
JFM		 783 bsize = psize * npkt;
784 PDEBUG(D_STREAM,
785 "isoc %d pkts size %d = bsize:%d",
786 npkt, psize, bsize);
51977a8d 787 nurbs = DEF_NURBS;
95d9142c 788 } else { /* bulk */
0be01004 789 npkt = 0;
dff369aa 790 bsize = gspca_dev->cam.bulk_size;
95d9142c
JFM		 791 if (bsize == 0)
792 bsize = psize;
0be01004 793 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
dff369aa
AO		 794 if (gspca_dev->cam.bulk_nurbs != 0)
795 nurbs = gspca_dev->cam.bulk_nurbs;
796 else
797 nurbs = 1;
0be01004
JFM		 798 }
799
d43fa32f 800 for (n = 0; n < nurbs; n++) {
63eb9546
JFM		 801 urb = usb_alloc_urb(npkt, GFP_KERNEL);
802 if (!urb) {
133a9fe9 803 pr_err("usb_alloc_urb failed\n");
63eb9546
JFM		 804 return -ENOMEM;
805 }
db870875 806 gspca_dev->urb[n] = urb;
997ea58e 807 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
63eb9546
JFM		 808 bsize,
809 GFP_KERNEL,
810 &urb->transfer_dma);
811
4aa0d037 812 if (urb->transfer_buffer == NULL) {
133a9fe9 813 pr_err("usb_alloc_coherent failed\n");
63eb9546
JFM		 814 return -ENOMEM;
815 }
63eb9546
JFM		 816 urb->dev = gspca_dev->dev;
817 urb->context = gspca_dev;
63eb9546 818 urb->transfer_buffer_length = bsize;
0be01004
JFM		 819 if (npkt != 0) { /* ISOC */
820 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
821 ep->desc.bEndpointAddress);
6c49da7f
FZ		 822 urb->transfer_flags = URB_ISO_ASAP
823 | URB_NO_TRANSFER_DMA_MAP;
51e23be2 824 urb->interval = 1 << (ep->desc.bInterval - 1);
0be01004
JFM		 825 urb->complete = isoc_irq;
826 urb->number_of_packets = npkt;
827 for (i = 0; i < npkt; i++) {
828 urb->iso_frame_desc[i].length = psize;
829 urb->iso_frame_desc[i].offset = psize * i;
830 }
831 } else { /* bulk */
832 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
a23c1947 833 ep->desc.bEndpointAddress);
6c49da7f 834 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
0be01004 835 urb->complete = bulk_irq;
63eb9546
JFM		 836 }
837 }
838 return 0;
839}
840
841/*
842 * start the USB transfer
843 */
844static int gspca_init_transfer(struct gspca_dev *gspca_dev)
845{
27b12023 846 struct usb_interface *intf;
63eb9546 847 struct usb_host_endpoint *ep;
db870875 848 struct urb *urb;
27b12023
JFM		 849 struct ep_tb_s ep_tb[MAX_ALT];
850 int n, ret, xfer, alt, alt_idx;
63eb9546 851
e2997a72
HG		 852 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
853 return -ERESTARTSYS;
63eb9546 854
090264e5
JFM		 855 if (!gspca_dev->present) {
856 ret = -ENODEV;
314b3e08 857 goto unlock;
090264e5
JFM		 858 }
859
f7059eaa
JFM		 860 /* reset the streaming variables */
861 gspca_dev->image = NULL;
862 gspca_dev->image_len = 0;
863 gspca_dev->last_packet_type = DISCARD_PACKET;
864 gspca_dev->sequence = 0;
865
ab6c8cf2
JFM		 866 gspca_dev->usb_err = 0;
867
27b12023 868 /* do the specific subdriver stuff before endpoint selection */
47faa6f8
HG		 869 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
870 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
1f53b0b0
JFM		 871 if (gspca_dev->sd_desc->isoc_init) {
872 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
873 if (ret < 0)
314b3e08 874 goto unlock;
1f53b0b0 875 }
27b12023
JFM		 876 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
877 : USB_ENDPOINT_XFER_ISOC;
314b3e08 878
66957b86 879 /* if bulk or the subdriver forced an altsetting, get the endpoint */
27b12023
JFM		 880 if (gspca_dev->alt != 0) {
881 gspca_dev->alt--; /* (previous version compatibility) */
882 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer);
883 if (ep == NULL) {
884 pr_err("bad altsetting %d\n", gspca_dev->alt);
885 ret = -EIO;
886 goto out;
887 }
888 ep_tb[0].alt = gspca_dev->alt;
889 alt_idx = 1;
890 } else {
891
892 /* else, compute the minimum bandwidth
893 * and build the endpoint table */
66957b86 894 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
27b12023
JFM		 895 if (alt_idx <= 0) {
896 pr_err("no transfer endpoint found\n");
897 ret = -EIO;
898 goto unlock;
899 }
1f53b0b0 900 }
27b12023
JFM		 901
902 /* set the highest alternate setting and
903 * loop until urb submit succeeds */
904 gspca_input_destroy_urb(gspca_dev);
905
906 gspca_dev->alt = ep_tb[--alt_idx].alt;
907 alt = -1;
63eb9546 908 for (;;) {
27b12023
JFM		 909 if (alt != gspca_dev->alt) {
910 alt = gspca_dev->alt;
6121ca57 911 if (intf->num_altsetting > 1) {
27b12023
JFM		 912 ret = usb_set_interface(gspca_dev->dev,
913 gspca_dev->iface,
914 alt);
915 if (ret < 0) {
4274d84c
JFM		 916 if (ret == -ENOSPC)
917 goto retry; /*fixme: ugly*/
27b12023
JFM		 918 pr_err("set alt %d err %d\n", alt, ret);
919 goto out;
920 }
921 }
922 }
47aaca96 923 if (!gspca_dev->cam.no_urb_create) {
27b12023
JFM		 924 PDEBUG(D_STREAM, "init transfer alt %d", alt);
925 ret = create_urbs(gspca_dev,
926 alt_xfer(&intf->altsetting[alt], xfer));
47aaca96
JFM		 927 if (ret < 0) {
928 destroy_urbs(gspca_dev);
929 goto out;
930 }
db870875 931 }
63eb9546 932
8fe2f1d5 933 /* clear the bulk endpoint */
6929dc6b 934 if (gspca_dev->cam.bulk)
8fe2f1d5 935 usb_clear_halt(gspca_dev->dev,
50e06dee 936 gspca_dev->urb[0]->pipe);
8fe2f1d5 937
63eb9546 938 /* start the cam */
72ab97ce
JFM		 939 ret = gspca_dev->sd_desc->start(gspca_dev);
940 if (ret < 0) {
941 destroy_urbs(gspca_dev);
942 goto out;
943 }
63eb9546 944 gspca_dev->streaming = 1;
63eb9546 945
dff369aa 946 /* some bulk transfers are started by the subdriver */
6929dc6b 947 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
51977a8d
JFM		 948 break;
949
63eb9546 950 /* submit the URBs */
db870875
JFM		 951 for (n = 0; n < MAX_NURBS; n++) {
952 urb = gspca_dev->urb[n];
953 if (urb == NULL)
954 break;
955 ret = usb_submit_urb(urb, GFP_KERNEL);
1f53b0b0
JFM		 956 if (ret < 0)
957 break;
63eb9546
JFM		 958 }
959 if (ret >= 0)
27b12023
JFM		 960 break; /* transfer is started */
961
962 /* something when wrong
963 * stop the webcam and free the transfer resources */
e4dac289 964 gspca_stream_off(gspca_dev);
4bdf4a83 965 if (ret != -ENOSPC) {
133a9fe9
JP		 966 pr_err("usb_submit_urb alt %d err %d\n",
967 gspca_dev->alt, ret);
1f53b0b0 968 goto out;
4bdf4a83 969 }
1f53b0b0
JFM		 970
971 /* the bandwidth is not wide enough
25985edc 972 * negotiate or try a lower alternate setting */
4274d84c 973retry:
4bdf4a83 974 PDEBUG(D_ERR|D_STREAM,
27b12023
JFM		 975 "alt %d - bandwidth not wide enough - trying again",
976 alt);
1f53b0b0
JFM		 977 msleep(20); /* wait for kill complete */
978 if (gspca_dev->sd_desc->isoc_nego) {
979 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
980 if (ret < 0)
981 goto out;
982 } else {
27b12023
JFM		 983 if (alt_idx <= 0) {
984 pr_err("no transfer endpoint found\n");
1f53b0b0
JFM		 985 ret = -EIO;
986 goto out;
987 }
ac97ecc8 988 gspca_dev->alt = ep_tb[--alt_idx].alt;
1f53b0b0 989 }
63eb9546
JFM		 990 }
991out:
314b3e08
HG		 992 gspca_input_create_urb(gspca_dev);
993unlock:
63eb9546
JFM		 994 mutex_unlock(&gspca_dev->usb_lock);
995 return ret;
996}
997
d43fa32f 998static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
63eb9546 999{
6a33091f 1000 struct gspca_ctrl *ctrl;
63eb9546
JFM		 1001 int i;
1002
1003 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
1004 gspca_dev->curr_mode = i;
1005 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
1006 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
c2446b3e 1007 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
6a33091f
JFM		 1008
1009 /* set the current control values to their default values
1010 * which may have changed in sd_init() */
62bba5dd
HV		 1011 /* does nothing if ctrl_handler == NULL */
1012 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
6a33091f
JFM		 1013 ctrl = gspca_dev->cam.ctrls;
1014 if (ctrl != NULL) {
1015 for (i = 0;
1016 i < gspca_dev->sd_desc->nctrls;
1017 i++, ctrl++)
1018 ctrl->val = ctrl->def;
1019 }
63eb9546
JFM		 1020}
1021
1022static int wxh_to_mode(struct gspca_dev *gspca_dev,
1023 int width, int height)
1024{
1025 int i;
1026
d43fa32f
JFM		 1027 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
1028 if (width >= gspca_dev->cam.cam_mode[i].width
1029 && height >= gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 1030 break;
1031 }
63eb9546
JFM		 1032 return i;
1033}
1034
63eb9546
JFM		 1035/*
1036 * search a mode with the right pixel format
1037 */
1038static int gspca_get_mode(struct gspca_dev *gspca_dev,
1039 int mode,
1040 int pixfmt)
1041{
1042 int modeU, modeD;
1043
1044 modeU = modeD = mode;
1045 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
1046 if (--modeD >= 0) {
c2446b3e
JFM		 1047 if (gspca_dev->cam.cam_mode[modeD].pixelformat
1048 == pixfmt)
63eb9546
JFM		 1049 return modeD;
1050 }
1051 if (++modeU < gspca_dev->cam.nmodes) {
c2446b3e
JFM		 1052 if (gspca_dev->cam.cam_mode[modeU].pixelformat
1053 == pixfmt)
63eb9546
JFM		 1054 return modeU;
1055 }
1056 }
1057 return -EINVAL;
1058}
1059
af1d9afa
BJ		 1060#ifdef CONFIG_VIDEO_ADV_DEBUG
1061static int vidioc_g_register(struct file *file, void *priv,
1062 struct v4l2_dbg_register *reg)
1063{
1064 int ret;
f4c1605a 1065 struct gspca_dev *gspca_dev = video_drvdata(file);
af1d9afa
BJ		 1066
1067 if (!gspca_dev->sd_desc->get_chip_ident)
1068 return -EINVAL;
1069
1070 if (!gspca_dev->sd_desc->get_register)
1071 return -EINVAL;
1072
1073 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1074 return -ERESTARTSYS;
8c4ebae4 1075 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1076 if (gspca_dev->present)
1077 ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
1078 else
1079 ret = -ENODEV;
1080 mutex_unlock(&gspca_dev->usb_lock);
1081
1082 return ret;
1083}
1084
1085static int vidioc_s_register(struct file *file, void *priv,
1086 struct v4l2_dbg_register *reg)
1087{
1088 int ret;
f4c1605a 1089 struct gspca_dev *gspca_dev = video_drvdata(file);
af1d9afa
BJ		 1090
1091 if (!gspca_dev->sd_desc->get_chip_ident)
1092 return -EINVAL;
1093
1094 if (!gspca_dev->sd_desc->set_register)
1095 return -EINVAL;
1096
1097 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1098 return -ERESTARTSYS;
8c4ebae4 1099 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1100 if (gspca_dev->present)
1101 ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
1102 else
1103 ret = -ENODEV;
1104 mutex_unlock(&gspca_dev->usb_lock);
1105
1106 return ret;
1107}
1108#endif
1109
1110static int vidioc_g_chip_ident(struct file *file, void *priv,
1111 struct v4l2_dbg_chip_ident *chip)
1112{
1113 int ret;
f4c1605a 1114 struct gspca_dev *gspca_dev = video_drvdata(file);
af1d9afa
BJ		 1115
1116 if (!gspca_dev->sd_desc->get_chip_ident)
1117 return -EINVAL;
1118
1119 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1120 return -ERESTARTSYS;
8c4ebae4 1121 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1122 if (gspca_dev->present)
1123 ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
1124 else
1125 ret = -ENODEV;
1126 mutex_unlock(&gspca_dev->usb_lock);
1127
1128 return ret;
1129}
1130
e078770a 1131static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1132 struct v4l2_fmtdesc *fmtdesc)
1133{
f4c1605a 1134 struct gspca_dev *gspca_dev = video_drvdata(file);
6a7eba24 1135 int i, j, index;
63eb9546
JFM		 1136 __u32 fmt_tb[8];
1137
63eb9546
JFM		 1138 /* give an index to each format */
1139 index = 0;
1140 j = 0;
1141 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
c2446b3e 1142 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
63eb9546
JFM		 1143 j = 0;
1144 for (;;) {
1145 if (fmt_tb[j] == fmt_tb[index])
1146 break;
1147 j++;
1148 }
1149 if (j == index) {
1150 if (fmtdesc->index == index)
1151 break; /* new format */
1152 index++;
80297125 1153 if (index >= ARRAY_SIZE(fmt_tb))
63eb9546
JFM		 1154 return -EINVAL;
1155 }
1156 }
1157 if (i < 0)
1158 return -EINVAL; /* no more format */
1159
63eb9546 1160 fmtdesc->pixelformat = fmt_tb[index];
b796fb6e
JFM		 1161 if (gspca_dev->cam.cam_mode[i].sizeimage <
1162 gspca_dev->cam.cam_mode[i].width *
1163 gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 1164 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1165 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1166 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1167 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1168 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1169 fmtdesc->description[4] = '\0';
1170 return 0;
1171}
1172
e078770a 1173static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1174 struct v4l2_format *fmt)
1175{
f4c1605a 1176 struct gspca_dev *gspca_dev = video_drvdata(file);
c2446b3e 1177 int mode;
63eb9546 1178
c2446b3e
JFM		 1179 mode = gspca_dev->curr_mode;
1180 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1181 sizeof fmt->fmt.pix);
63eb9546
JFM		 1182 return 0;
1183}
1184
e078770a 1185static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1186 struct v4l2_format *fmt)
1187{
24c530b4 1188 int w, h, mode, mode2;
63eb9546 1189
4aa0d037
JFM		 1190 w = fmt->fmt.pix.width;
1191 h = fmt->fmt.pix.height;
d43fa32f 1192
335b3f88 1193#ifdef GSPCA_DEBUG
63eb9546
JFM		 1194 if (gspca_debug & D_CONF)
1195 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1196#endif
1197 /* search the closest mode for width and height */
1198 mode = wxh_to_mode(gspca_dev, w, h);
1199
1200 /* OK if right palette */
c2446b3e
JFM		 1201 if (gspca_dev->cam.cam_mode[mode].pixelformat
1202 != fmt->fmt.pix.pixelformat) {
63eb9546
JFM		 1203
1204 /* else, search the closest mode with the same pixel format */
1205 mode2 = gspca_get_mode(gspca_dev, mode,
1206 fmt->fmt.pix.pixelformat);
c2446b3e 1207 if (mode2 >= 0)
63eb9546 1208 mode = mode2;
c2446b3e
JFM		 1209/* else
1210 ; * no chance, return this mode */
63eb9546 1211 }
c2446b3e
JFM		 1212 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1213 sizeof fmt->fmt.pix);
63eb9546
JFM		 1214 return mode; /* used when s_fmt */
1215}
1216
e078770a 1217static int vidioc_try_fmt_vid_cap(struct file *file,
63eb9546
JFM		 1218 void *priv,
1219 struct v4l2_format *fmt)
1220{
f4c1605a 1221 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1222 int ret;
1223
e078770a 1224 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1225 if (ret < 0)
1226 return ret;
1227 return 0;
1228}
1229
e078770a 1230static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1231 struct v4l2_format *fmt)
1232{
f4c1605a 1233 struct gspca_dev *gspca_dev = video_drvdata(file);
d43fa32f 1234 int ret;
63eb9546 1235
e2997a72
HG		 1236 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1237 return -ERESTARTSYS;
d43fa32f 1238
e078770a 1239 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1240 if (ret < 0)
1241 goto out;
1242
d43fa32f
JFM		 1243 if (gspca_dev->nframes != 0
1244 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1245 ret = -EINVAL;
1246 goto out;
1247 }
1248
50a871fe
JFM		 1249 if (ret == gspca_dev->curr_mode) {
1250 ret = 0;
63eb9546 1251 goto out; /* same mode */
50a871fe 1252 }
d43fa32f
JFM		 1253
1254 if (gspca_dev->streaming) {
1255 ret = -EBUSY;
1256 goto out;
e2997a72 1257 }
4aa0d037
JFM		 1258 gspca_dev->width = fmt->fmt.pix.width;
1259 gspca_dev->height = fmt->fmt.pix.height;
63eb9546
JFM		 1260 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1261 gspca_dev->curr_mode = ret;
d43fa32f 1262
d43fa32f 1263 ret = 0;
63eb9546
JFM		 1264out:
1265 mutex_unlock(&gspca_dev->queue_lock);
1266 return ret;
1267}
1268
11c635a2
HG		 1269static int vidioc_enum_framesizes(struct file *file, void *priv,
1270 struct v4l2_frmsizeenum *fsize)
1271{
f4c1605a 1272 struct gspca_dev *gspca_dev = video_drvdata(file);
11c635a2
HG		 1273 int i;
1274 __u32 index = 0;
1275
1276 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1277 if (fsize->pixel_format !=
1278 gspca_dev->cam.cam_mode[i].pixelformat)
1279 continue;
1280
1281 if (fsize->index == index) {
1282 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1283 fsize->discrete.width =
1284 gspca_dev->cam.cam_mode[i].width;
1285 fsize->discrete.height =
1286 gspca_dev->cam.cam_mode[i].height;
1287 return 0;
1288 }
1289 index++;
1290 }
1291
1292 return -EINVAL;
1293}
1294
28ffe77f
AO		 1295static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1296 struct v4l2_frmivalenum *fival)
1297{
f4c1605a 1298 struct gspca_dev *gspca_dev = video_drvdata(filp);
28ffe77f
AO		 1299 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1300 __u32 i;
1301
1302 if (gspca_dev->cam.mode_framerates == NULL ||
1303 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1304 return -EINVAL;
1305
1306 if (fival->pixel_format !=
1307 gspca_dev->cam.cam_mode[mode].pixelformat)
1308 return -EINVAL;
1309
1310 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1311 if (fival->index == i) {
1312 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1313 fival->discrete.numerator = 1;
1314 fival->discrete.denominator =
1315 gspca_dev->cam.mode_framerates[mode].rates[i];
1316 return 0;
1317 }
1318 }
1319
1320 return -EINVAL;
1321}
1322
d0182306 1323static void gspca_release(struct video_device *vfd)
6b060ffe 1324{
d0182306 1325 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
6b060ffe 1326
38c7c036
LP		 1327 PDEBUG(D_PROBE, "%s released",
1328 video_device_node_name(&gspca_dev->vdev));
6b060ffe 1329
62bba5dd 1330 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
2333565d 1331 v4l2_device_unregister(&gspca_dev->v4l2_dev);
6b060ffe
FZ		 1332 kfree(gspca_dev->usb_buf);
1333 kfree(gspca_dev);
1334}
1335
bec43661 1336static int dev_open(struct file *file)
63eb9546 1337{
f4c1605a 1338 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546 1339
0d07e240 1340 PDEBUG(D_STREAM, "[%s] open", current->comm);
7f6eb118
HG		 1341 if (!gspca_dev->present)
1342 return -ENODEV;
5c4fa002
JFM		 1343
1344 /* protect the subdriver against rmmod */
7f6eb118
HG		 1345 if (!try_module_get(gspca_dev->module))
1346 return -ENODEV;
6b060ffe 1347
335b3f88 1348#ifdef GSPCA_DEBUG
63eb9546 1349 /* activate the v4l2 debug */
d43fa32f 1350 if (gspca_debug & D_V4L2)
a12ca6a6 1351 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
9de436cf 1352 | V4L2_DEBUG_IOCTL_ARG;
63eb9546 1353 else
a12ca6a6 1354 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
9de436cf 1355 | V4L2_DEBUG_IOCTL_ARG);
63eb9546 1356#endif
2333565d 1357 return v4l2_fh_open(file);
63eb9546
JFM		 1358}
1359
bec43661 1360static int dev_close(struct file *file)
63eb9546 1361{
f4c1605a 1362 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546 1363
0d07e240 1364 PDEBUG(D_STREAM, "[%s] close", current->comm);
e2997a72
HG		 1365 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1366 return -ERESTARTSYS;
e2997a72 1367
5b77ae77 1368 /* if the file did the capture, free the streaming resources */
4aa0d037 1369 if (gspca_dev->capt_file == file) {
a1e8288b
JFM		 1370 if (gspca_dev->streaming) {
1371 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1372 gspca_dev->usb_err = 0;
a1e8288b
JFM		 1373 gspca_stream_off(gspca_dev);
1374 mutex_unlock(&gspca_dev->usb_lock);
1375 }
4aa0d037 1376 frame_free(gspca_dev);
4aa0d037 1377 }
5c4fa002 1378 module_put(gspca_dev->module);
63eb9546 1379 mutex_unlock(&gspca_dev->queue_lock);
6b060ffe 1380
d43fa32f 1381 PDEBUG(D_STREAM, "close done");
6b060ffe 1382
2333565d 1383 return v4l2_fh_release(file);
63eb9546
JFM		 1384}
1385
1386static int vidioc_querycap(struct file *file, void *priv,
1387 struct v4l2_capability *cap)
1388{
f4c1605a 1389 struct gspca_dev *gspca_dev = video_drvdata(file);
090264e5 1390 int ret;
63eb9546 1391
090264e5
JFM		 1392 /* protect the access to the usb device */
1393 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1394 return -ERESTARTSYS;
1395 if (!gspca_dev->present) {
1396 ret = -ENODEV;
1397 goto out;
1398 }
e7d712cc 1399 strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
d8518590 1400 sizeof cap->driver);
c6edaf16 1401 if (gspca_dev->dev->product != NULL) {
e7d712cc 1402 strlcpy((char *) cap->card, gspca_dev->dev->product,
c6edaf16
JFM		 1403 sizeof cap->card);
1404 } else {
d8518590 1405 snprintf((char *) cap->card, sizeof cap->card,
c6edaf16
JFM		 1406 "USB Camera (%04x:%04x)",
1407 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1408 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1409 }
d8518590
JFM		 1410 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1411 sizeof(cap->bus_info));
63eb9546
JFM		 1412 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
1413 | V4L2_CAP_STREAMING
1414 | V4L2_CAP_READWRITE;
090264e5
JFM		 1415 ret = 0;
1416out:
1417 mutex_unlock(&gspca_dev->usb_lock);
1418 return ret;
63eb9546
JFM		 1419}
1420
6a33091f 1421static int get_ctrl(struct gspca_dev *gspca_dev,
a0001a28
HG		 1422 int id)
1423{
1424 const struct ctrl *ctrls;
1425 int i;
1426
1427 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1428 i < gspca_dev->sd_desc->nctrls;
1429 i++, ctrls++) {
1430 if (gspca_dev->ctrl_dis & (1 << i))
1431 continue;
1432 if (id == ctrls->qctrl.id)
6a33091f 1433 return i;
a0001a28 1434 }
6a33091f 1435 return -1;
a0001a28
HG		 1436}
1437
63eb9546
JFM		 1438static int vidioc_queryctrl(struct file *file, void *priv,
1439 struct v4l2_queryctrl *q_ctrl)
1440{
f4c1605a 1441 struct gspca_dev *gspca_dev = video_drvdata(file);
a0001a28 1442 const struct ctrl *ctrls;
6a33091f
JFM		 1443 struct gspca_ctrl *gspca_ctrl;
1444 int i, idx;
6a7eba24
JFM		 1445 u32 id;
1446
1447 id = q_ctrl->id;
1448 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1449 id &= V4L2_CTRL_ID_MASK;
1450 id++;
6a33091f 1451 idx = -1;
6a7eba24 1452 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
a0001a28 1453 if (gspca_dev->ctrl_dis & (1 << i))
f50ba1be 1454 continue;
b8bfb5fb 1455 if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
f50ba1be 1456 continue;
6a33091f
JFM		 1457 if (idx >= 0
1458 && gspca_dev->sd_desc->ctrls[i].qctrl.id
780e3121 1459 > gspca_dev->sd_desc->ctrls[idx].qctrl.id)
b8bfb5fb 1460 continue;
6a33091f 1461 idx = i;
63eb9546 1462 }
a0001a28 1463 } else {
6a33091f 1464 idx = get_ctrl(gspca_dev, id);
63eb9546 1465 }
6a33091f
JFM		 1466 if (idx < 0)
1467 return -EINVAL;
1468 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1469 memcpy(q_ctrl, &ctrls->qctrl, sizeof *q_ctrl);
1470 if (gspca_dev->cam.ctrls != NULL) {
1471 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1472 q_ctrl->default_value = gspca_ctrl->def;
1473 q_ctrl->minimum = gspca_ctrl->min;
1474 q_ctrl->maximum = gspca_ctrl->max;
1475 }
1476 if (gspca_dev->ctrl_inac & (1 << idx))
4af85668 1477 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
f50ba1be 1478 return 0;
63eb9546
JFM		 1479}
1480
1481static int vidioc_s_ctrl(struct file *file, void *priv,
1482 struct v4l2_control *ctrl)
1483{
f4c1605a 1484 struct gspca_dev *gspca_dev = video_drvdata(file);
a5ae2062 1485 const struct ctrl *ctrls;
6a33091f
JFM		 1486 struct gspca_ctrl *gspca_ctrl;
1487 int idx, ret;
63eb9546 1488
6a33091f
JFM		 1489 idx = get_ctrl(gspca_dev, ctrl->id);
1490 if (idx < 0)
a0001a28 1491 return -EINVAL;
6a33091f
JFM		 1492 if (gspca_dev->ctrl_inac & (1 << idx))
1493 return -EINVAL;
1494 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1495 if (gspca_dev->cam.ctrls != NULL) {
1496 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1497 if (ctrl->value < gspca_ctrl->min
1498 || ctrl->value > gspca_ctrl->max)
1499 return -ERANGE;
1500 } else {
1501 gspca_ctrl = NULL;
1502 if (ctrl->value < ctrls->qctrl.minimum
1503 || ctrl->value > ctrls->qctrl.maximum)
1504 return -ERANGE;
1505 }
a0001a28
HG		 1506 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1507 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1508 return -ERESTARTSYS;
6a33091f
JFM		 1509 if (!gspca_dev->present) {
1510 ret = -ENODEV;
1511 goto out;
1512 }
8c4ebae4 1513 gspca_dev->usb_err = 0;
6a33091f 1514 if (ctrls->set != NULL) {
a0001a28 1515 ret = ctrls->set(gspca_dev, ctrl->value);
6a33091f
JFM		 1516 goto out;
1517 }
1518 if (gspca_ctrl != NULL) {
1519 gspca_ctrl->val = ctrl->value;
1520 if (ctrls->set_control != NULL
1521 && gspca_dev->streaming)
1522 ctrls->set_control(gspca_dev);
1523 }
1524 ret = gspca_dev->usb_err;
1525out:
a0001a28
HG		 1526 mutex_unlock(&gspca_dev->usb_lock);
1527 return ret;
63eb9546
JFM		 1528}
1529
1530static int vidioc_g_ctrl(struct file *file, void *priv,
1531 struct v4l2_control *ctrl)
1532{
f4c1605a 1533 struct gspca_dev *gspca_dev = video_drvdata(file);
a5ae2062 1534 const struct ctrl *ctrls;
6a33091f 1535 int idx, ret;
63eb9546 1536
6a33091f
JFM		 1537 idx = get_ctrl(gspca_dev, ctrl->id);
1538 if (idx < 0)
a0001a28 1539 return -EINVAL;
6a33091f 1540 ctrls = &gspca_dev->sd_desc->ctrls[idx];
a0001a28
HG		 1541
1542 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1543 return -ERESTARTSYS;
6a33091f
JFM		 1544 if (!gspca_dev->present) {
1545 ret = -ENODEV;
1546 goto out;
1547 }
8c4ebae4 1548 gspca_dev->usb_err = 0;
6a33091f 1549 if (ctrls->get != NULL) {
a0001a28 1550 ret = ctrls->get(gspca_dev, &ctrl->value);
6a33091f
JFM		 1551 goto out;
1552 }
1553 if (gspca_dev->cam.ctrls != NULL)
1554 ctrl->value = gspca_dev->cam.ctrls[idx].val;
1555 ret = 0;
1556out:
a0001a28
HG		 1557 mutex_unlock(&gspca_dev->usb_lock);
1558 return ret;
63eb9546
JFM		 1559}
1560
1561static int vidioc_querymenu(struct file *file, void *priv,
1562 struct v4l2_querymenu *qmenu)
1563{
f4c1605a 1564 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1565
1566 if (!gspca_dev->sd_desc->querymenu)
1567 return -EINVAL;
1568 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1569}
1570
1571static int vidioc_enum_input(struct file *file, void *priv,
1572 struct v4l2_input *input)
1573{
f4c1605a 1574 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1575
1576 if (input->index != 0)
1577 return -EINVAL;
63eb9546 1578 input->type = V4L2_INPUT_TYPE_CAMERA;
dfa76fa2 1579 input->status = gspca_dev->cam.input_flags;
e7d712cc 1580 strlcpy(input->name, gspca_dev->sd_desc->name,
63eb9546
JFM		 1581 sizeof input->name);
1582 return 0;
1583}
1584
1585static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1586{
1587 *i = 0;
1588 return 0;
1589}
1590
1591static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1592{
1593 if (i > 0)
1594 return -EINVAL;
1595 return (0);
1596}
1597
1598static int vidioc_reqbufs(struct file *file, void *priv,
1599 struct v4l2_requestbuffers *rb)
1600{
f4c1605a 1601 struct gspca_dev *gspca_dev = video_drvdata(file);
832d0a91 1602 int i, ret = 0, streaming;
63eb9546 1603
a2ba6f27
JFM		 1604 i = rb->memory; /* (avoid compilation warning) */
1605 switch (i) {
5b77ae77 1606 case GSPCA_MEMORY_READ: /* (internal call) */
d43fa32f 1607 case V4L2_MEMORY_MMAP:
d43fa32f 1608 case V4L2_MEMORY_USERPTR:
6a7eba24 1609 break;
d43fa32f 1610 default:
63eb9546 1611 return -EINVAL;
d43fa32f 1612 }
e2997a72
HG		 1613 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1614 return -ERESTARTSYS;
d43fa32f 1615
5b77ae77 1616 if (gspca_dev->memory != GSPCA_MEMORY_NO
ce5610bc 1617 && gspca_dev->memory != GSPCA_MEMORY_READ
5b77ae77 1618 && gspca_dev->memory != rb->memory) {
4aa0d037
JFM		 1619 ret = -EBUSY;
1620 goto out;
1621 }
d43fa32f 1622
5b77ae77
JFM		 1623 /* only one file may do the capture */
1624 if (gspca_dev->capt_file != NULL
1625 && gspca_dev->capt_file != file) {
1626 ret = -EBUSY;
1627 goto out;
1628 }
1629
1630 /* if allocated, the buffers must not be mapped */
1631 for (i = 0; i < gspca_dev->nframes; i++) {
1632 if (gspca_dev->frame[i].vma_use_count) {
ac0d6df6
JFM		 1633 ret = -EBUSY;
1634 goto out;
1635 }
5b77ae77
JFM		 1636 }
1637
1638 /* stop streaming */
832d0a91
JFM		 1639 streaming = gspca_dev->streaming;
1640 if (streaming) {
5b77ae77 1641 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1642 gspca_dev->usb_err = 0;
5b77ae77
JFM		 1643 gspca_stream_off(gspca_dev);
1644 mutex_unlock(&gspca_dev->usb_lock);
59929cef
JFM		 1645
1646 /* Don't restart the stream when switching from read
1647 * to mmap mode */
1648 if (gspca_dev->memory == GSPCA_MEMORY_READ)
1649 streaming = 0;
5b77ae77
JFM		 1650 }
1651
1652 /* free the previous allocated buffers, if any */
d642de2e 1653 if (gspca_dev->nframes != 0)
5b77ae77 1654 frame_free(gspca_dev);
5b77ae77
JFM		 1655 if (rb->count == 0) /* unrequest */
1656 goto out;
d642de2e 1657 ret = frame_alloc(gspca_dev, file, rb->memory, rb->count);
5b77ae77
JFM		 1658 if (ret == 0) {
1659 rb->count = gspca_dev->nframes;
832d0a91
JFM		 1660 if (streaming)
1661 ret = gspca_init_transfer(gspca_dev);
4aa0d037
JFM		 1662 }
1663out:
63eb9546
JFM		 1664 mutex_unlock(&gspca_dev->queue_lock);
1665 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1666 return ret;
1667}
1668
1669static int vidioc_querybuf(struct file *file, void *priv,
1670 struct v4l2_buffer *v4l2_buf)
1671{
f4c1605a 1672 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1673 struct gspca_frame *frame;
1674
13752bd9 1675 if (v4l2_buf->index < 0
63eb9546
JFM		 1676 || v4l2_buf->index >= gspca_dev->nframes)
1677 return -EINVAL;
1678
1679 frame = &gspca_dev->frame[v4l2_buf->index];
1680 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1681 return 0;
1682}
1683
1684static int vidioc_streamon(struct file *file, void *priv,
1685 enum v4l2_buf_type buf_type)
1686{
f4c1605a 1687 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1688 int ret;
1689
63eb9546
JFM		 1690 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1691 return -EINVAL;
e2997a72
HG		 1692 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1693 return -ERESTARTSYS;
090264e5 1694
18bf99aa
JFM		 1695 /* check the capture file */
1696 if (gspca_dev->capt_file != file) {
1697 ret = -EBUSY;
1698 goto out;
1699 }
1700
1edabe71
JFM		 1701 if (gspca_dev->nframes == 0
1702 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
63eb9546
JFM		 1703 ret = -EINVAL;
1704 goto out;
1705 }
1706 if (!gspca_dev->streaming) {
1707 ret = gspca_init_transfer(gspca_dev);
1708 if (ret < 0)
1709 goto out;
1710 }
335b3f88 1711#ifdef GSPCA_DEBUG
63eb9546
JFM		 1712 if (gspca_debug & D_STREAM) {
1713 PDEBUG_MODE("stream on OK",
1714 gspca_dev->pixfmt,
1715 gspca_dev->width,
1716 gspca_dev->height);
1717 }
1718#endif
e2997a72 1719 ret = 0;
63eb9546
JFM		 1720out:
1721 mutex_unlock(&gspca_dev->queue_lock);
1722 return ret;
1723}
1724
1725static int vidioc_streamoff(struct file *file, void *priv,
1726 enum v4l2_buf_type buf_type)
1727{
f4c1605a 1728 struct gspca_dev *gspca_dev = video_drvdata(file);
f7059eaa 1729 int ret;
63eb9546 1730
63eb9546
JFM		 1731 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1732 return -EINVAL;
4e770f76 1733
4aa0d037
JFM		 1734 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1735 return -ERESTARTSYS;
5b77ae77 1736
4e770f76
HG		 1737 if (!gspca_dev->streaming) {
1738 ret = 0;
1739 goto out;
1740 }
1741
18bf99aa
JFM		 1742 /* check the capture file */
1743 if (gspca_dev->capt_file != file) {
1744 ret = -EBUSY;
1745 goto out;
1746 }
1747
5b77ae77 1748 /* stop streaming */
4aa0d037
JFM		 1749 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1750 ret = -ERESTARTSYS;
1751 goto out;
63eb9546 1752 }
8c4ebae4 1753 gspca_dev->usb_err = 0;
4aa0d037 1754 gspca_stream_off(gspca_dev);
4aa0d037 1755 mutex_unlock(&gspca_dev->usb_lock);
0d0ae15d
HG		 1756 /* In case another thread is waiting in dqbuf */
1757 wake_up_interruptible(&gspca_dev->wq);
5b77ae77 1758
f7059eaa
JFM		 1759 /* empty the transfer queues */
1760 atomic_set(&gspca_dev->fr_q, 0);
1761 atomic_set(&gspca_dev->fr_i, 0);
1762 gspca_dev->fr_o = 0;
5b77ae77 1763 ret = 0;
4aa0d037
JFM		 1764out:
1765 mutex_unlock(&gspca_dev->queue_lock);
1766 return ret;
63eb9546
JFM		 1767}
1768
1769static int vidioc_g_jpegcomp(struct file *file, void *priv,
1770 struct v4l2_jpegcompression *jpegcomp)
1771{
f4c1605a 1772 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1773 int ret;
1774
1775 if (!gspca_dev->sd_desc->get_jcomp)
1776 return -EINVAL;
e2997a72
HG		 1777 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1778 return -ERESTARTSYS;
8c4ebae4 1779 gspca_dev->usb_err = 0;
090264e5
JFM		 1780 if (gspca_dev->present)
1781 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1782 else
1783 ret = -ENODEV;
63eb9546
JFM		 1784 mutex_unlock(&gspca_dev->usb_lock);
1785 return ret;
1786}
1787
1788static int vidioc_s_jpegcomp(struct file *file, void *priv,
1789 struct v4l2_jpegcompression *jpegcomp)
1790{
f4c1605a 1791 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1792 int ret;
1793
63eb9546
JFM		 1794 if (!gspca_dev->sd_desc->set_jcomp)
1795 return -EINVAL;
f86d4a91
JP		 1796 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1797 return -ERESTARTSYS;
8c4ebae4 1798 gspca_dev->usb_err = 0;
090264e5
JFM		 1799 if (gspca_dev->present)
1800 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1801 else
1802 ret = -ENODEV;
63eb9546
JFM		 1803 mutex_unlock(&gspca_dev->usb_lock);
1804 return ret;
1805}
1806
1807static int vidioc_g_parm(struct file *filp, void *priv,
1808 struct v4l2_streamparm *parm)
1809{
f4c1605a 1810 struct gspca_dev *gspca_dev = video_drvdata(filp);
63eb9546 1811
63eb9546 1812 parm->parm.capture.readbuffers = gspca_dev->nbufread;
627a5ef7
JP		 1813
1814 if (gspca_dev->sd_desc->get_streamparm) {
1815 int ret;
1816
1817 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1818 return -ERESTARTSYS;
668f44a6
JFM		 1819 if (gspca_dev->present) {
1820 gspca_dev->usb_err = 0;
1821 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1822 ret = gspca_dev->usb_err;
1823 } else {
090264e5 1824 ret = -ENODEV;
668f44a6 1825 }
627a5ef7
JP		 1826 mutex_unlock(&gspca_dev->usb_lock);
1827 return ret;
1828 }
1829
63eb9546
JFM		 1830 return 0;
1831}
1832
1833static int vidioc_s_parm(struct file *filp, void *priv,
1834 struct v4l2_streamparm *parm)
1835{
f4c1605a 1836 struct gspca_dev *gspca_dev = video_drvdata(filp);
63eb9546
JFM		 1837 int n;
1838
63eb9546 1839 n = parm->parm.capture.readbuffers;
f7059eaa 1840 if (n == 0 || n >= GSPCA_MAX_FRAMES)
63eb9546
JFM		 1841 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1842 else
1843 gspca_dev->nbufread = n;
627a5ef7
JP		 1844
1845 if (gspca_dev->sd_desc->set_streamparm) {
1846 int ret;
1847
1848 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1849 return -ERESTARTSYS;
668f44a6
JFM		 1850 if (gspca_dev->present) {
1851 gspca_dev->usb_err = 0;
1852 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1853 ret = gspca_dev->usb_err;
1854 } else {
090264e5 1855 ret = -ENODEV;
668f44a6 1856 }
627a5ef7
JP		 1857 mutex_unlock(&gspca_dev->usb_lock);
1858 return ret;
1859 }
1860
63eb9546
JFM		 1861 return 0;
1862}
1863
63eb9546
JFM		 1864static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1865{
f4c1605a 1866 struct gspca_dev *gspca_dev = video_drvdata(file);
efab8211 1867 struct gspca_frame *frame;
63eb9546
JFM		 1868 struct page *page;
1869 unsigned long addr, start, size;
1870 int i, ret;
63eb9546
JFM		 1871
1872 start = vma->vm_start;
1873 size = vma->vm_end - vma->vm_start;
1874 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1875
e2997a72
HG		 1876 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1877 return -ERESTARTSYS;
63eb9546
JFM		 1878 if (!gspca_dev->present) {
1879 ret = -ENODEV;
4aa0d037
JFM		 1880 goto out;
1881 }
1882 if (gspca_dev->capt_file != file) {
1883 ret = -EINVAL;
1884 goto out;
63eb9546
JFM		 1885 }
1886
efab8211 1887 frame = NULL;
63eb9546
JFM		 1888 for (i = 0; i < gspca_dev->nframes; ++i) {
1889 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1890 PDEBUG(D_STREAM, "mmap bad memory type");
1891 break;
1892 }
1893 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1894 == vma->vm_pgoff) {
1895 frame = &gspca_dev->frame[i];
1896 break;
1897 }
1898 }
efab8211 1899 if (frame == NULL) {
63eb9546
JFM		 1900 PDEBUG(D_STREAM, "mmap no frame buffer found");
1901 ret = -EINVAL;
4aa0d037 1902 goto out;
63eb9546 1903 }
38bff697 1904 if (size != frame->v4l2_buf.length) {
63eb9546
JFM		 1905 PDEBUG(D_STREAM, "mmap bad size");
1906 ret = -EINVAL;
4aa0d037 1907 goto out;
63eb9546
JFM		 1908 }
1909
1910 /*
1911 * - VM_IO marks the area as being a mmaped region for I/O to a
1912 * device. It also prevents the region from being core dumped.
1913 */
1914 vma->vm_flags |= VM_IO;
1915
1916 addr = (unsigned long) frame->data;
1917 while (size > 0) {
1918 page = vmalloc_to_page((void *) addr);
1919 ret = vm_insert_page(vma, start, page);
1920 if (ret < 0)
4aa0d037 1921 goto out;
63eb9546
JFM		 1922 start += PAGE_SIZE;
1923 addr += PAGE_SIZE;
1924 size -= PAGE_SIZE;
1925 }
1926
d50e257e 1927 vma->vm_ops = &gspca_vm_ops;
63eb9546
JFM		 1928 vma->vm_private_data = frame;
1929 gspca_vm_open(vma);
e2997a72 1930 ret = 0;
4aa0d037 1931out:
63eb9546
JFM		 1932 mutex_unlock(&gspca_dev->queue_lock);
1933 return ret;
1934}
1935
27074efa
HG		 1936static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file,
1937 enum v4l2_memory memory)
1938{
1939 if (!gspca_dev->present)
1940 return -ENODEV;
1941 if (gspca_dev->capt_file != file || gspca_dev->memory != memory ||
1942 !gspca_dev->streaming)
1943 return -EINVAL;
1944
1945 /* check if a frame is ready */
1946 return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i);
1947}
1948
1949static int frame_ready(struct gspca_dev *gspca_dev, struct file *file,
1950 enum v4l2_memory memory)
1951{
1952 int ret;
1953
1954 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1955 return -ERESTARTSYS;
1956 ret = frame_ready_nolock(gspca_dev, file, memory);
1957 mutex_unlock(&gspca_dev->queue_lock);
1958 return ret;
1959}
1960
63eb9546 1961/*
27074efa 1962 * dequeue a video buffer
63eb9546 1963 *
27074efa 1964 * If nonblock_ing is false, block until a buffer is available.
63eb9546 1965 */
27074efa
HG		 1966static int vidioc_dqbuf(struct file *file, void *priv,
1967 struct v4l2_buffer *v4l2_buf)
63eb9546 1968{
f4c1605a 1969 struct gspca_dev *gspca_dev = video_drvdata(file);
27074efa
HG		 1970 struct gspca_frame *frame;
1971 int i, j, ret;
63eb9546 1972
27074efa
HG		 1973 PDEBUG(D_FRAM, "dqbuf");
1974
1975 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1976 return -ERESTARTSYS;
1977
1978 for (;;) {
1979 ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory);
1980 if (ret < 0)
1981 goto out;
1982 if (ret > 0)
1983 break;
1984
1985 mutex_unlock(&gspca_dev->queue_lock);
1986
1987 if (file->f_flags & O_NONBLOCK)
181b704f
HG		 1988 return -EAGAIN;
1989
1990 /* wait till a frame is ready */
4aa0d037 1991 ret = wait_event_interruptible_timeout(gspca_dev->wq,
27074efa 1992 frame_ready(gspca_dev, file, v4l2_buf->memory),
181b704f
HG		 1993 msecs_to_jiffies(3000));
1994 if (ret < 0)
1995 return ret;
27074efa 1996 if (ret == 0)
e2997a72 1997 return -EIO;
27074efa
HG		 1998
1999 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
2000 return -ERESTARTSYS;
63eb9546 2001 }
181b704f 2002
27074efa
HG		 2003 i = gspca_dev->fr_o;
2004 j = gspca_dev->fr_queue[i];
2005 frame = &gspca_dev->frame[j];
2006
f7059eaa 2007 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
e2997a72 2008
739570bb
JFM		 2009 if (gspca_dev->sd_desc->dq_callback) {
2010 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 2011 gspca_dev->usb_err = 0;
090264e5
JFM		 2012 if (gspca_dev->present)
2013 gspca_dev->sd_desc->dq_callback(gspca_dev);
739570bb
JFM		 2014 mutex_unlock(&gspca_dev->usb_lock);
2015 }
5b77ae77 2016
4a82bc60
HG		 2017 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
2018 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
2019 PDEBUG(D_FRAM, "dqbuf %d", j);
2020 ret = 0;
2021
ac0d6df6 2022 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
c6eb8eaf 2023 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
ac0d6df6
JFM		 2024 frame->data,
2025 frame->v4l2_buf.bytesused)) {
2026 PDEBUG(D_ERR|D_STREAM,
2027 "dqbuf cp to user failed");
2028 ret = -EFAULT;
ac0d6df6
JFM		 2029 }
2030 }
4aa0d037 2031out:
27074efa 2032 mutex_unlock(&gspca_dev->queue_lock);
63eb9546
JFM		 2033 return ret;
2034}
2035
2036/*
2037 * queue a video buffer
2038 *
2039 * Attempting to queue a buffer that has already been
2040 * queued will return -EINVAL.
2041 */
2042static int vidioc_qbuf(struct file *file, void *priv,
2043 struct v4l2_buffer *v4l2_buf)
2044{
f4c1605a 2045 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 2046 struct gspca_frame *frame;
2047 int i, index, ret;
2048
2049 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
63eb9546 2050
5b77ae77
JFM		 2051 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
2052 return -ERESTARTSYS;
2053
63eb9546
JFM		 2054 index = v4l2_buf->index;
2055 if ((unsigned) index >= gspca_dev->nframes) {
d43fa32f 2056 PDEBUG(D_FRAM,
63eb9546 2057 "qbuf idx %d >= %d", index, gspca_dev->nframes);
5b77ae77
JFM		 2058 ret = -EINVAL;
2059 goto out;
63eb9546 2060 }
5b77ae77 2061 if (v4l2_buf->memory != gspca_dev->memory) {
d43fa32f 2062 PDEBUG(D_FRAM, "qbuf bad memory type");
5b77ae77
JFM		 2063 ret = -EINVAL;
2064 goto out;
63eb9546 2065 }
e2997a72 2066
5b77ae77 2067 frame = &gspca_dev->frame[index];
d43fa32f
JFM		 2068 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
2069 PDEBUG(D_FRAM, "qbuf bad state");
63eb9546
JFM		 2070 ret = -EINVAL;
2071 goto out;
2072 }
2073
2074 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
63eb9546 2075
d43fa32f 2076 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
63eb9546
JFM		 2077 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
2078 frame->v4l2_buf.length = v4l2_buf->length;
2079 }
2080
2081 /* put the buffer in the 'queued' queue */
f7059eaa 2082 i = atomic_read(&gspca_dev->fr_q);
63eb9546 2083 gspca_dev->fr_queue[i] = index;
f7059eaa 2084 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
63eb9546
JFM		 2085
2086 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
2087 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
2088 ret = 0;
2089out:
2090 mutex_unlock(&gspca_dev->queue_lock);
2091 return ret;
2092}
2093
d43fa32f
JFM		 2094/*
2095 * allocate the resources for read()
2096 */
2097static int read_alloc(struct gspca_dev *gspca_dev,
2098 struct file *file)
63eb9546 2099{
63eb9546 2100 struct v4l2_buffer v4l2_buf;
d43fa32f 2101 int i, ret;
63eb9546 2102
d43fa32f 2103 PDEBUG(D_STREAM, "read alloc");
63eb9546
JFM		 2104 if (gspca_dev->nframes == 0) {
2105 struct v4l2_requestbuffers rb;
2106
2107 memset(&rb, 0, sizeof rb);
2108 rb.count = gspca_dev->nbufread;
2109 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2110 rb.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2111 ret = vidioc_reqbufs(file, gspca_dev, &rb);
2112 if (ret != 0) {
d43fa32f 2113 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
63eb9546
JFM		 2114 return ret;
2115 }
2116 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2117 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2118 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2119 for (i = 0; i < gspca_dev->nbufread; i++) {
2120 v4l2_buf.index = i;
63eb9546
JFM		 2121 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2122 if (ret != 0) {
2123 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
2124 return ret;
2125 }
2126 }
d43fa32f
JFM		 2127 gspca_dev->memory = GSPCA_MEMORY_READ;
2128 }
4aa0d037 2129
d43fa32f
JFM		 2130 /* start streaming */
2131 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
2132 if (ret != 0)
2133 PDEBUG(D_STREAM, "read streamon err %d", ret);
2134 return ret;
2135}
2136
2137static unsigned int dev_poll(struct file *file, poll_table *wait)
2138{
f4c1605a 2139 struct gspca_dev *gspca_dev = video_drvdata(file);
f7059eaa 2140 int ret;
d43fa32f
JFM		 2141
2142 PDEBUG(D_FRAM, "poll");
2143
2144 poll_wait(file, &gspca_dev->wq, wait);
d43fa32f 2145
5b77ae77 2146 /* if reqbufs is not done, the user would use read() */
ee362991 2147 if (gspca_dev->memory == GSPCA_MEMORY_NO) {
d43fa32f 2148 ret = read_alloc(gspca_dev, file);
5b77ae77
JFM		 2149 if (ret != 0)
2150 return POLLERR;
63eb9546
JFM		 2151 }
2152
d43fa32f
JFM		 2153 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
2154 return POLLERR;
d43fa32f 2155
f7059eaa
JFM		 2156 /* check if an image has been received */
2157 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
2158 ret = POLLIN | POLLRDNORM; /* yes */
d43fa32f
JFM		 2159 else
2160 ret = 0;
d43fa32f 2161 mutex_unlock(&gspca_dev->queue_lock);
090264e5
JFM		 2162 if (!gspca_dev->present)
2163 return POLLHUP;
d43fa32f
JFM		 2164 return ret;
2165}
2166
2167static ssize_t dev_read(struct file *file, char __user *data,
2168 size_t count, loff_t *ppos)
2169{
f4c1605a 2170 struct gspca_dev *gspca_dev = video_drvdata(file);
d43fa32f
JFM		 2171 struct gspca_frame *frame;
2172 struct v4l2_buffer v4l2_buf;
2173 struct timeval timestamp;
82643d0e 2174 int n, ret, ret2;
d43fa32f 2175
a9e11134 2176 PDEBUG(D_FRAM, "read (%zd)", count);
d43fa32f
JFM		 2177 if (!gspca_dev->present)
2178 return -ENODEV;
ee362991 2179 if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */
d43fa32f
JFM		 2180 ret = read_alloc(gspca_dev, file);
2181 if (ret != 0)
2182 return ret;
d43fa32f
JFM		 2183 }
2184
63eb9546 2185 /* get a frame */
2f51d00f 2186 timestamp = ktime_to_timeval(ktime_get());
63eb9546 2187 timestamp.tv_sec--;
82643d0e
JFM		 2188 n = 2;
2189 for (;;) {
63eb9546
JFM		 2190 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2191 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2192 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2193 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2194 if (ret != 0) {
2195 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2196 return ret;
2197 }
2198
2199 /* if the process slept for more than 1 second,
219423c1 2200 * get a newer frame */
63eb9546 2201 frame = &gspca_dev->frame[v4l2_buf.index];
82643d0e
JFM		 2202 if (--n < 0)
2203 break; /* avoid infinite loop */
63eb9546
JFM		 2204 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2205 break;
2206 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2207 if (ret != 0) {
2208 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2209 return ret;
2210 }
2211 }
2212
2213 /* copy the frame */
ac0d6df6
JFM		 2214 if (count > frame->v4l2_buf.bytesused)
2215 count = frame->v4l2_buf.bytesused;
63eb9546
JFM		 2216 ret = copy_to_user(data, frame->data, count);
2217 if (ret != 0) {
2218 PDEBUG(D_ERR|D_STREAM,
a9e11134 2219 "read cp to user lack %d / %zd", ret, count);
63eb9546
JFM		 2220 ret = -EFAULT;
2221 goto out;
2222 }
2223 ret = count;
2224out:
2225 /* in each case, requeue the buffer */
2226 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2227 if (ret2 != 0)
2228 return ret2;
2229 return ret;
2230}
2231
bec43661 2232static struct v4l2_file_operations dev_fops = {
63eb9546
JFM		 2233 .owner = THIS_MODULE,
2234 .open = dev_open,
2235 .release = dev_close,
2236 .read = dev_read,
2237 .mmap = dev_mmap,
bec43661 2238 .unlocked_ioctl = video_ioctl2,
63eb9546
JFM		 2239 .poll = dev_poll,
2240};
2241
a399810c 2242static const struct v4l2_ioctl_ops dev_ioctl_ops = {
63eb9546
JFM		 2243 .vidioc_querycap = vidioc_querycap,
2244 .vidioc_dqbuf = vidioc_dqbuf,
2245 .vidioc_qbuf = vidioc_qbuf,
e078770a
MCC		 2246 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2247 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2248 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2249 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
63eb9546
JFM		 2250 .vidioc_streamon = vidioc_streamon,
2251 .vidioc_queryctrl = vidioc_queryctrl,
2252 .vidioc_g_ctrl = vidioc_g_ctrl,
2253 .vidioc_s_ctrl = vidioc_s_ctrl,
2254 .vidioc_querymenu = vidioc_querymenu,
2255 .vidioc_enum_input = vidioc_enum_input,
2256 .vidioc_g_input = vidioc_g_input,
2257 .vidioc_s_input = vidioc_s_input,
2258 .vidioc_reqbufs = vidioc_reqbufs,
2259 .vidioc_querybuf = vidioc_querybuf,
2260 .vidioc_streamoff = vidioc_streamoff,
2261 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2262 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2263 .vidioc_g_parm = vidioc_g_parm,
2264 .vidioc_s_parm = vidioc_s_parm,
11c635a2 2265 .vidioc_enum_framesizes = vidioc_enum_framesizes,
28ffe77f 2266 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
af1d9afa
BJ		 2267#ifdef CONFIG_VIDEO_ADV_DEBUG
2268 .vidioc_g_register = vidioc_g_register,
2269 .vidioc_s_register = vidioc_s_register,
2270#endif
2271 .vidioc_g_chip_ident = vidioc_g_chip_ident,
63eb9546
JFM		 2272};
2273
59929cef 2274static const struct video_device gspca_template = {
a399810c 2275 .name = "gspca main driver",
a399810c
HV		 2276 .fops = &dev_fops,
2277 .ioctl_ops = &dev_ioctl_ops,
d0182306 2278 .release = gspca_release,
a399810c
HV		 2279};
2280
6a33091f
JFM		 2281/* initialize the controls */
2282static void ctrls_init(struct gspca_dev *gspca_dev)
2283{
2284 struct gspca_ctrl *ctrl;
2285 int i;
2286
2287 for (i = 0, ctrl = gspca_dev->cam.ctrls;
2288 i < gspca_dev->sd_desc->nctrls;
2289 i++, ctrl++) {
2290 ctrl->def = gspca_dev->sd_desc->ctrls[i].qctrl.default_value;
2291 ctrl->val = ctrl->def;
2292 ctrl->min = gspca_dev->sd_desc->ctrls[i].qctrl.minimum;
2293 ctrl->max = gspca_dev->sd_desc->ctrls[i].qctrl.maximum;
2294 }
2295}
2296
63eb9546
JFM		 2297/*
2298 * probe and create a new gspca device
2299 *
2300 * This function must be called by the sub-driver when it is
2301 * called for probing a new device.
2302 */
4462864d 2303int gspca_dev_probe2(struct usb_interface *intf,
63eb9546
JFM		 2304 const struct usb_device_id *id,
2305 const struct sd_desc *sd_desc,
d43fa32f
JFM		 2306 int dev_size,
2307 struct module *module)
63eb9546 2308{
63eb9546
JFM		 2309 struct gspca_dev *gspca_dev;
2310 struct usb_device *dev = interface_to_usbdev(intf);
2311 int ret;
63eb9546 2312
ee7dd4e0
JFM		 2313 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
2314 sd_desc->name, id->idVendor, id->idProduct);
63eb9546 2315
63eb9546
JFM		 2316 /* create the device */
2317 if (dev_size < sizeof *gspca_dev)
2318 dev_size = sizeof *gspca_dev;
2319 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
e293e599 2320 if (!gspca_dev) {
133a9fe9 2321 pr_err("couldn't kzalloc gspca struct\n");
e293e599 2322 return -ENOMEM;
63eb9546 2323 }
8295d99e
JFM		 2324 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2325 if (!gspca_dev->usb_buf) {
133a9fe9 2326 pr_err("out of memory\n");
e293e599 2327 ret = -ENOMEM;
8295d99e
JFM		 2328 goto out;
2329 }
63eb9546 2330 gspca_dev->dev = dev;
4462864d 2331 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
35680baa
JFM		 2332
2333 /* check if any audio device */
5dae603d 2334 if (dev->actconfig->desc.bNumInterfaces != 1) {
35680baa
JFM		 2335 int i;
2336 struct usb_interface *intf2;
2337
5dae603d
HG		 2338 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
2339 intf2 = dev->actconfig->interface[i];
35680baa
JFM		 2340 if (intf2 != NULL
2341 && intf2->altsetting != NULL
2342 && intf2->altsetting->desc.bInterfaceClass ==
2343 USB_CLASS_AUDIO) {
2344 gspca_dev->audio = 1;
2345 break;
2346 }
2347 }
2348 }
2349
2333565d
HV		 2350 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
2351 if (ret)
2352 goto out;
63eb9546 2353 gspca_dev->sd_desc = sd_desc;
63eb9546 2354 gspca_dev->nbufread = 2;
ff374747 2355 gspca_dev->empty_packet = -1; /* don't check the empty packets */
62bba5dd 2356 gspca_dev->vdev = gspca_template;
2333565d 2357 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
f4c1605a 2358 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
2333565d 2359 set_bit(V4L2_FL_USE_FH_PRIO, &gspca_dev->vdev.flags);
62bba5dd
HV		 2360 gspca_dev->module = module;
2361 gspca_dev->present = 1;
2362
2363 mutex_init(&gspca_dev->usb_lock);
2364 mutex_init(&gspca_dev->queue_lock);
2365 init_waitqueue_head(&gspca_dev->wq);
63eb9546 2366
012d6b02 2367 /* configure the subdriver and initialize the USB device */
ba38ee8e 2368 ret = sd_desc->config(gspca_dev, id);
012d6b02
JFM		 2369 if (ret < 0)
2370 goto out;
6a33091f
JFM		 2371 if (gspca_dev->cam.ctrls != NULL)
2372 ctrls_init(gspca_dev);
ba38ee8e 2373 ret = sd_desc->init(gspca_dev);
62bba5dd
HV		 2374 if (ret < 0)
2375 goto out;
2376 if (sd_desc->init_controls)
2377 ret = sd_desc->init_controls(gspca_dev);
63eb9546
JFM		 2378 if (ret < 0)
2379 goto out;
2380 gspca_set_default_mode(gspca_dev);
2381
10ee2402
HG		 2382 ret = gspca_input_connect(gspca_dev);
2383 if (ret)
2384 goto out;
2385
63eb9546 2386 /* init video stuff */
a12ca6a6 2387 ret = video_register_device(&gspca_dev->vdev,
63eb9546 2388 VFL_TYPE_GRABBER,
8d584a53 2389 -1);
63eb9546 2390 if (ret < 0) {
133a9fe9 2391 pr_err("video_register_device err %d\n", ret);
63eb9546
JFM		 2392 goto out;
2393 }
2394
63eb9546 2395 usb_set_intfdata(intf, gspca_dev);
38c7c036 2396 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
0274d42e 2397
10ee2402 2398 gspca_input_create_urb(gspca_dev);
0274d42e 2399
63eb9546
JFM		 2400 return 0;
2401out:
f7628015 2402#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
10ee2402
HG		 2403 if (gspca_dev->input_dev)
2404 input_unregister_device(gspca_dev->input_dev);
e7637521 2405#endif
62bba5dd 2406 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
e07a1d8a
JFM		 2407 kfree(gspca_dev->usb_buf);
2408 kfree(gspca_dev);
63eb9546
JFM		 2409 return ret;
2410}
4462864d
JFM		 2411EXPORT_SYMBOL(gspca_dev_probe2);
2412
2413/* same function as the previous one, but check the interface */
2414int gspca_dev_probe(struct usb_interface *intf,
2415 const struct usb_device_id *id,
2416 const struct sd_desc *sd_desc,
2417 int dev_size,
2418 struct module *module)
2419{
2420 struct usb_device *dev = interface_to_usbdev(intf);
2421
2422 /* we don't handle multi-config cameras */
2423 if (dev->descriptor.bNumConfigurations != 1) {
133a9fe9
JP		 2424 pr_err("%04x:%04x too many config\n",
2425 id->idVendor, id->idProduct);
4462864d
JFM		 2426 return -ENODEV;
2427 }
2428
2429 /* the USB video interface must be the first one */
5dae603d 2430 if (dev->actconfig->desc.bNumInterfaces != 1
c4dc692c 2431 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
4462864d 2432 return -ENODEV;
4462864d
JFM		 2433
2434 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
2435}
63eb9546
JFM		 2436EXPORT_SYMBOL(gspca_dev_probe);
2437
2438/*
2439 * USB disconnection
2440 *
2441 * This function must be called by the sub-driver
2442 * when the device disconnects, after the specific resources are freed.
2443 */
2444void gspca_disconnect(struct usb_interface *intf)
2445{
4aa0d037 2446 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
f7628015 2447#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e 2448 struct input_dev *input_dev;
e070bf9e 2449#endif
63eb9546 2450
38c7c036
LP		 2451 PDEBUG(D_PROBE, "%s disconnect",
2452 video_device_node_name(&gspca_dev->vdev));
ad28127d 2453 mutex_lock(&gspca_dev->usb_lock);
4e770f76 2454
6e4ae872 2455 gspca_dev->present = 0;
4e770f76 2456 wake_up_interruptible(&gspca_dev->wq);
6e4ae872 2457
4e770f76 2458 destroy_urbs(gspca_dev);
090264e5 2459
f7628015 2460#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 2461 gspca_input_destroy_urb(gspca_dev);
2462 input_dev = gspca_dev->input_dev;
2463 if (input_dev) {
2464 gspca_dev->input_dev = NULL;
2465 input_unregister_device(input_dev);
2466 }
e070bf9e 2467#endif
0274d42e 2468
090264e5 2469 /* the device is freed at exit of this function */
ad28127d 2470 gspca_dev->dev = NULL;
2333565d 2471 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
090264e5
JFM		 2472 mutex_unlock(&gspca_dev->usb_lock);
2473
6b060ffe
FZ		 2474 usb_set_intfdata(intf, NULL);
2475
a12ca6a6 2476 /* release the device */
25985edc 2477 /* (this will call gspca_release() immediately or on last close) */
a12ca6a6 2478 video_unregister_device(&gspca_dev->vdev);
3145b8c1 2479
0d07e240 2480/* PDEBUG(D_PROBE, "disconnect complete"); */
63eb9546
JFM		 2481}
2482EXPORT_SYMBOL(gspca_disconnect);
2483
6a709749
JFM		 2484#ifdef CONFIG_PM
2485int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2486{
2487 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2488
2489 if (!gspca_dev->streaming)
2490 return 0;
2491 gspca_dev->frozen = 1; /* avoid urb error messages */
012d6b02
JFM		 2492 if (gspca_dev->sd_desc->stopN)
2493 gspca_dev->sd_desc->stopN(gspca_dev);
6a709749 2494 destroy_urbs(gspca_dev);
0274d42e 2495 gspca_input_destroy_urb(gspca_dev);
6a709749 2496 gspca_set_alt0(gspca_dev);
012d6b02
JFM		 2497 if (gspca_dev->sd_desc->stop0)
2498 gspca_dev->sd_desc->stop0(gspca_dev);
6a709749
JFM		 2499 return 0;
2500}
2501EXPORT_SYMBOL(gspca_suspend);
2502
2503int gspca_resume(struct usb_interface *intf)
2504{
2505 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
62bba5dd 2506 int streaming;
6a709749
JFM		 2507
2508 gspca_dev->frozen = 0;
012d6b02 2509 gspca_dev->sd_desc->init(gspca_dev);
0274d42e 2510 gspca_input_create_urb(gspca_dev);
62bba5dd
HV		 2511 /*
2512 * Most subdrivers send all ctrl values on sd_start and thus
2513 * only write to the device registers on s_ctrl when streaming ->
2514 * Clear streaming to avoid setting all ctrls twice.
2515 */
2516 streaming = gspca_dev->streaming;
2517 gspca_dev->streaming = 0;
2518 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
2519 if (streaming)
012d6b02 2520 return gspca_init_transfer(gspca_dev);
1e89e2da 2521 return 0;
6a709749
JFM		 2522}
2523EXPORT_SYMBOL(gspca_resume);
2524#endif
dcef3237
HG		 2525/* -- cam driver utility functions -- */
2526
2527/* auto gain and exposure algorithm based on the knee algorithm described here:
2528 http://ytse.tricolour.net/docs/LowLightOptimization.html
2529
2530 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2531 where changed. */
2532int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2533 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2534{
2535 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2536 const struct ctrl *gain_ctrl = NULL;
2537 const struct ctrl *exposure_ctrl = NULL;
2538 const struct ctrl *autogain_ctrl = NULL;
2539 int retval = 0;
2540
2541 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
26984b09
HG		 2542 if (gspca_dev->ctrl_dis & (1 << i))
2543 continue;
dcef3237
HG		 2544 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2545 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2546 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2547 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2548 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2549 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2550 }
2551 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2552 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2553 "on cam without (auto)gain/exposure");
2554 return 0;
2555 }
2556
2557 if (gain_ctrl->get(gspca_dev, &gain) ||
2558 exposure_ctrl->get(gspca_dev, &exposure) ||
2559 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2560 return 0;
2561
2562 orig_gain = gain;
2563 orig_exposure = exposure;
2564
2565 /* If we are of a multiple of deadzone, do multiple steps to reach the
2566 desired lumination fast (with the risc of a slight overshoot) */
2567 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2568
1c44d81d 2569 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
dcef3237
HG		 2570 avg_lum, desired_avg_lum, steps);
2571
2572 for (i = 0; i < steps; i++) {
2573 if (avg_lum > desired_avg_lum) {
2574 if (gain > gain_knee)
2575 gain--;
2576 else if (exposure > exposure_knee)
2577 exposure--;
2578 else if (gain > gain_ctrl->qctrl.default_value)
2579 gain--;
2580 else if (exposure > exposure_ctrl->qctrl.minimum)
2581 exposure--;
2582 else if (gain > gain_ctrl->qctrl.minimum)
2583 gain--;
2584 else
2585 break;
2586 } else {
2587 if (gain < gain_ctrl->qctrl.default_value)
2588 gain++;
2589 else if (exposure < exposure_knee)
2590 exposure++;
2591 else if (gain < gain_knee)
2592 gain++;
2593 else if (exposure < exposure_ctrl->qctrl.maximum)
2594 exposure++;
2595 else if (gain < gain_ctrl->qctrl.maximum)
2596 gain++;
2597 else
2598 break;
2599 }
2600 }
2601
2602 if (gain != orig_gain) {
2603 gain_ctrl->set(gspca_dev, gain);
2604 retval = 1;
2605 }
2606 if (exposure != orig_exposure) {
2607 exposure_ctrl->set(gspca_dev, exposure);
2608 retval = 1;
2609 }
2610
2611 return retval;
2612}
2613EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2614
63eb9546
JFM		 2615/* -- module insert / remove -- */
2616static int __init gspca_init(void)
2617{
f22123fa 2618 pr_info("v" GSPCA_VERSION " registered\n");
63eb9546
JFM		 2619 return 0;
2620}
2621static void __exit gspca_exit(void)
2622{
63eb9546
JFM		 2623}
2624
2625module_init(gspca_init);
2626module_exit(gspca_exit);
2627
335b3f88 2628#ifdef GSPCA_DEBUG
63eb9546
JFM		 2629module_param_named(debug, gspca_debug, int, 0644);
2630MODULE_PARM_DESC(debug,
2631 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
f8e5677f 2632 " 0x08:stream 0x10:frame 0x20:packet"
d43fa32f 2633 " 0x0100: v4l2");
6a7eba24 2634#endif
Linux kernel - Deliverables
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