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[media] gspca: Use current logging styles
[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
63eb9546
JFM		 26#define MODULE_NAME "gspca"
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>
63eb9546
JFM		 41
42#include "gspca.h"
43
f7628015 44#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 45#include <linux/input.h>
46#include <linux/usb/input.h>
e070bf9e 47#endif
0274d42e 48
d43fa32f 49/* global values */
8fee8453
JFM		 50#define DEF_NURBS 3 /* default number of URBs */
51#if DEF_NURBS > MAX_NURBS
52#error "DEF_NURBS too big"
53#endif
d43fa32f 54
b0eaab76
MCC		 55#define DRIVER_VERSION_NUMBER "2.13.0"
56
27c6f9e5 57MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
63eb9546
JFM		 58MODULE_DESCRIPTION("GSPCA USB Camera Driver");
59MODULE_LICENSE("GPL");
b0eaab76 60MODULE_VERSION(DRIVER_VERSION_NUMBER);
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
502static int gspca_is_compressed(__u32 format)
503{
504 switch (format) {
505 case V4L2_PIX_FMT_MJPEG:
506 case V4L2_PIX_FMT_JPEG:
50a871fe 507 case V4L2_PIX_FMT_SPCA561:
ab8f12cf 508 case V4L2_PIX_FMT_PAC207:
d661e622 509 case V4L2_PIX_FMT_MR97310A:
63eb9546
JFM		 510 return 1;
511 }
512 return 0;
513}
514
d642de2e
HG		 515static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file,
516 enum v4l2_memory memory, unsigned int count)
63eb9546 517{
d43fa32f
JFM		 518 struct gspca_frame *frame;
519 unsigned int frsz;
520 int i;
63eb9546 521
c2446b3e
JFM		 522 i = gspca_dev->curr_mode;
523 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
63eb9546 524 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
63eb9546 525 frsz = PAGE_ALIGN(frsz);
f7059eaa
JFM		 526 if (count >= GSPCA_MAX_FRAMES)
527 count = GSPCA_MAX_FRAMES - 1;
e795d912 528 gspca_dev->frbuf = vmalloc_32(frsz * count);
ac0d6df6 529 if (!gspca_dev->frbuf) {
133a9fe9 530 pr_err("frame alloc failed\n");
ac0d6df6 531 return -ENOMEM;
63eb9546 532 }
d642de2e
HG		 533 gspca_dev->capt_file = file;
534 gspca_dev->memory = memory;
535 gspca_dev->frsz = frsz;
63eb9546
JFM		 536 gspca_dev->nframes = count;
537 for (i = 0; i < count; i++) {
d43fa32f
JFM		 538 frame = &gspca_dev->frame[i];
539 frame->v4l2_buf.index = i;
540 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
541 frame->v4l2_buf.flags = 0;
542 frame->v4l2_buf.field = V4L2_FIELD_NONE;
543 frame->v4l2_buf.length = frsz;
d642de2e 544 frame->v4l2_buf.memory = memory;
d43fa32f 545 frame->v4l2_buf.sequence = 0;
b192ca98 546 frame->data = gspca_dev->frbuf + i * frsz;
ac0d6df6 547 frame->v4l2_buf.m.offset = i * frsz;
63eb9546 548 }
f7059eaa
JFM		 549 atomic_set(&gspca_dev->fr_q, 0);
550 atomic_set(&gspca_dev->fr_i, 0);
551 gspca_dev->fr_o = 0;
d43fa32f 552 return 0;
63eb9546
JFM		 553}
554
555static void frame_free(struct gspca_dev *gspca_dev)
556{
557 int i;
558
559 PDEBUG(D_STREAM, "frame free");
efab8211 560 if (gspca_dev->frbuf != NULL) {
e795d912 561 vfree(gspca_dev->frbuf);
63eb9546
JFM		 562 gspca_dev->frbuf = NULL;
563 for (i = 0; i < gspca_dev->nframes; i++)
564 gspca_dev->frame[i].data = NULL;
565 }
566 gspca_dev->nframes = 0;
d642de2e
HG		 567 gspca_dev->frsz = 0;
568 gspca_dev->capt_file = NULL;
569 gspca_dev->memory = GSPCA_MEMORY_NO;
63eb9546
JFM		 570}
571
d43fa32f 572static void destroy_urbs(struct gspca_dev *gspca_dev)
63eb9546
JFM		 573{
574 struct urb *urb;
575 unsigned int i;
576
577 PDEBUG(D_STREAM, "kill transfer");
44732819 578 for (i = 0; i < MAX_NURBS; i++) {
4aa0d037 579 urb = gspca_dev->urb[i];
63eb9546 580 if (urb == NULL)
d43fa32f 581 break;
63eb9546 582
4aa0d037 583 gspca_dev->urb[i] = NULL;
090264e5 584 usb_kill_urb(urb);
efab8211 585 if (urb->transfer_buffer != NULL)
997ea58e
DM		 586 usb_free_coherent(gspca_dev->dev,
587 urb->transfer_buffer_length,
588 urb->transfer_buffer,
589 urb->transfer_dma);
63eb9546
JFM		 590 usb_free_urb(urb);
591 }
63eb9546
JFM		 592}
593
e4dac289
JFM		 594static int gspca_set_alt0(struct gspca_dev *gspca_dev)
595{
596 int ret;
597
598 if (gspca_dev->alt == 0)
599 return 0;
600 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
601 if (ret < 0)
133a9fe9 602 pr_err("set alt 0 err %d\n", ret);
e4dac289
JFM		 603 return ret;
604}
605
606/* Note: both the queue and the usb locks should be held when calling this */
607static void gspca_stream_off(struct gspca_dev *gspca_dev)
608{
609 gspca_dev->streaming = 0;
610 if (gspca_dev->present) {
611 if (gspca_dev->sd_desc->stopN)
612 gspca_dev->sd_desc->stopN(gspca_dev);
613 destroy_urbs(gspca_dev);
614 gspca_input_destroy_urb(gspca_dev);
615 gspca_set_alt0(gspca_dev);
616 gspca_input_create_urb(gspca_dev);
617 }
618
619 /* always call stop0 to free the subdriver's resources */
620 if (gspca_dev->sd_desc->stop0)
621 gspca_dev->sd_desc->stop0(gspca_dev);
622 PDEBUG(D_STREAM, "stream off OK");
623}
624
63eb9546 625/*
219423c1 626 * look for an input transfer endpoint in an alternate setting
63eb9546 627 */
0be01004 628static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
6929dc6b 629 int xfer)
63eb9546
JFM		 630{
631 struct usb_host_endpoint *ep;
632 int i, attr;
633
63eb9546
JFM		 634 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
635 ep = &alt->endpoint[i];
50e06dee 636 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
30d35e49 637 if (attr == xfer
7106225a
PC		 638 && ep->desc.wMaxPacketSize != 0
639 && usb_endpoint_dir_in(&ep->desc))
50e06dee 640 return ep;
63eb9546
JFM		 641 }
642 return NULL;
643}
644
645/*
219423c1 646 * look for an input (isoc or bulk) endpoint
63eb9546
JFM		 647 *
648 * The endpoint is defined by the subdriver.
649 * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
650 * This routine may be called many times when the bandwidth is too small
651 * (the bandwidth is checked on urb submit).
652 */
0be01004 653static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
63eb9546
JFM		 654{
655 struct usb_interface *intf;
656 struct usb_host_endpoint *ep;
6929dc6b 657 int xfer, i, ret;
63eb9546
JFM		 658
659 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
6a7eba24 660 ep = NULL;
6929dc6b
JFM		 661 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
662 : USB_ENDPOINT_XFER_ISOC;
63eb9546 663 i = gspca_dev->alt; /* previous alt setting */
a511ba94
HG		 664 if (gspca_dev->cam.reverse_alts) {
665 while (++i < gspca_dev->nbalt) {
666 ep = alt_xfer(&intf->altsetting[i], xfer);
667 if (ep)
668 break;
669 }
670 } else {
671 while (--i >= 0) {
672 ep = alt_xfer(&intf->altsetting[i], xfer);
673 if (ep)
674 break;
675 }
63eb9546 676 }
6a7eba24 677 if (ep == NULL) {
133a9fe9 678 pr_err("no transfer endpoint found\n");
6929dc6b 679 return NULL;
63eb9546 680 }
0be01004 681 PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
63eb9546 682 i, ep->desc.bEndpointAddress);
1c8336d3 683 gspca_dev->alt = i; /* memorize the current alt setting */
8dd07ef1 684 if (gspca_dev->nbalt > 1) {
95d9142c
JFM		 685 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
686 if (ret < 0) {
133a9fe9 687 pr_err("set alt %d err %d\n", i, ret);
0274d42e 688 ep = NULL;
95d9142c 689 }
63eb9546 690 }
63eb9546
JFM		 691 return ep;
692}
693
694/*
0be01004 695 * create the URBs for image transfer
63eb9546
JFM		 696 */
697static int create_urbs(struct gspca_dev *gspca_dev,
698 struct usb_host_endpoint *ep)
699{
700 struct urb *urb;
d43fa32f 701 int n, nurbs, i, psize, npkt, bsize;
63eb9546
JFM		 702
703 /* calculate the packet size and the number of packets */
63eb9546 704 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
d43fa32f 705
6929dc6b 706 if (!gspca_dev->cam.bulk) { /* isoc */
95d9142c
JFM		 707
708 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
1f53b0b0
JFM		 709 if (gspca_dev->pkt_size == 0)
710 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
711 else
712 psize = gspca_dev->pkt_size;
49cb6b04
JFM		 713 npkt = gspca_dev->cam.npkt;
714 if (npkt == 0)
715 npkt = 32; /* default value */
0be01004
JFM		 716 bsize = psize * npkt;
717 PDEBUG(D_STREAM,
718 "isoc %d pkts size %d = bsize:%d",
719 npkt, psize, bsize);
51977a8d 720 nurbs = DEF_NURBS;
95d9142c 721 } else { /* bulk */
0be01004 722 npkt = 0;
dff369aa 723 bsize = gspca_dev->cam.bulk_size;
95d9142c
JFM		 724 if (bsize == 0)
725 bsize = psize;
0be01004 726 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
dff369aa
AO		 727 if (gspca_dev->cam.bulk_nurbs != 0)
728 nurbs = gspca_dev->cam.bulk_nurbs;
729 else
730 nurbs = 1;
0be01004
JFM		 731 }
732
d43fa32f 733 for (n = 0; n < nurbs; n++) {
63eb9546
JFM		 734 urb = usb_alloc_urb(npkt, GFP_KERNEL);
735 if (!urb) {
133a9fe9 736 pr_err("usb_alloc_urb failed\n");
63eb9546
JFM		 737 return -ENOMEM;
738 }
db870875 739 gspca_dev->urb[n] = urb;
997ea58e 740 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
63eb9546
JFM		 741 bsize,
742 GFP_KERNEL,
743 &urb->transfer_dma);
744
4aa0d037 745 if (urb->transfer_buffer == NULL) {
133a9fe9 746 pr_err("usb_alloc_coherent failed\n");
63eb9546
JFM		 747 return -ENOMEM;
748 }
63eb9546
JFM		 749 urb->dev = gspca_dev->dev;
750 urb->context = gspca_dev;
63eb9546 751 urb->transfer_buffer_length = bsize;
0be01004
JFM		 752 if (npkt != 0) { /* ISOC */
753 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
754 ep->desc.bEndpointAddress);
6c49da7f
FZ		 755 urb->transfer_flags = URB_ISO_ASAP
756 | URB_NO_TRANSFER_DMA_MAP;
0be01004
JFM		 757 urb->interval = ep->desc.bInterval;
758 urb->complete = isoc_irq;
759 urb->number_of_packets = npkt;
760 for (i = 0; i < npkt; i++) {
761 urb->iso_frame_desc[i].length = psize;
762 urb->iso_frame_desc[i].offset = psize * i;
763 }
764 } else { /* bulk */
765 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
a23c1947 766 ep->desc.bEndpointAddress);
6c49da7f 767 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
0be01004 768 urb->complete = bulk_irq;
63eb9546
JFM		 769 }
770 }
771 return 0;
772}
773
774/*
775 * start the USB transfer
776 */
777static int gspca_init_transfer(struct gspca_dev *gspca_dev)
778{
63eb9546 779 struct usb_host_endpoint *ep;
db870875 780 struct urb *urb;
63eb9546
JFM		 781 int n, ret;
782
e2997a72
HG		 783 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
784 return -ERESTARTSYS;
63eb9546 785
090264e5
JFM		 786 if (!gspca_dev->present) {
787 ret = -ENODEV;
314b3e08 788 goto unlock;
090264e5
JFM		 789 }
790
f7059eaa
JFM		 791 /* reset the streaming variables */
792 gspca_dev->image = NULL;
793 gspca_dev->image_len = 0;
794 gspca_dev->last_packet_type = DISCARD_PACKET;
795 gspca_dev->sequence = 0;
796
ab6c8cf2
JFM		 797 gspca_dev->usb_err = 0;
798
d43fa32f
JFM		 799 /* set the higher alternate setting and
800 * loop until urb submit succeeds */
a511ba94
HG		 801 if (gspca_dev->cam.reverse_alts)
802 gspca_dev->alt = 0;
803 else
804 gspca_dev->alt = gspca_dev->nbalt;
805
1f53b0b0
JFM		 806 if (gspca_dev->sd_desc->isoc_init) {
807 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
808 if (ret < 0)
314b3e08 809 goto unlock;
1f53b0b0 810 }
314b3e08
HG		 811
812 gspca_input_destroy_urb(gspca_dev);
1f53b0b0
JFM		 813 ep = get_ep(gspca_dev);
814 if (ep == NULL) {
815 ret = -EIO;
816 goto out;
817 }
63eb9546 818 for (;;) {
47aaca96
JFM		 819 if (!gspca_dev->cam.no_urb_create) {
820 PDEBUG(D_STREAM, "init transfer alt %d",
821 gspca_dev->alt);
822 ret = create_urbs(gspca_dev, ep);
823 if (ret < 0) {
824 destroy_urbs(gspca_dev);
825 goto out;
826 }
db870875 827 }
63eb9546 828
8fe2f1d5 829 /* clear the bulk endpoint */
6929dc6b 830 if (gspca_dev->cam.bulk)
8fe2f1d5 831 usb_clear_halt(gspca_dev->dev,
50e06dee 832 gspca_dev->urb[0]->pipe);
8fe2f1d5 833
63eb9546 834 /* start the cam */
72ab97ce
JFM		 835 ret = gspca_dev->sd_desc->start(gspca_dev);
836 if (ret < 0) {
837 destroy_urbs(gspca_dev);
838 goto out;
839 }
63eb9546 840 gspca_dev->streaming = 1;
63eb9546 841
dff369aa 842 /* some bulk transfers are started by the subdriver */
6929dc6b 843 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
51977a8d
JFM		 844 break;
845
63eb9546 846 /* submit the URBs */
db870875
JFM		 847 for (n = 0; n < MAX_NURBS; n++) {
848 urb = gspca_dev->urb[n];
849 if (urb == NULL)
850 break;
851 ret = usb_submit_urb(urb, GFP_KERNEL);
1f53b0b0
JFM		 852 if (ret < 0)
853 break;
63eb9546
JFM		 854 }
855 if (ret >= 0)
856 break;
e4dac289 857 gspca_stream_off(gspca_dev);
4bdf4a83 858 if (ret != -ENOSPC) {
133a9fe9
JP		 859 pr_err("usb_submit_urb alt %d err %d\n",
860 gspca_dev->alt, ret);
1f53b0b0 861 goto out;
4bdf4a83 862 }
1f53b0b0
JFM		 863
864 /* the bandwidth is not wide enough
25985edc 865 * negotiate or try a lower alternate setting */
4bdf4a83
JFM		 866 PDEBUG(D_ERR|D_STREAM,
867 "bandwidth not wide enough - trying again");
1f53b0b0
JFM		 868 msleep(20); /* wait for kill complete */
869 if (gspca_dev->sd_desc->isoc_nego) {
870 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
871 if (ret < 0)
872 goto out;
873 } else {
874 ep = get_ep(gspca_dev);
875 if (ep == NULL) {
876 ret = -EIO;
877 goto out;
878 }
879 }
63eb9546
JFM		 880 }
881out:
314b3e08
HG		 882 gspca_input_create_urb(gspca_dev);
883unlock:
63eb9546
JFM		 884 mutex_unlock(&gspca_dev->usb_lock);
885 return ret;
886}
887
d43fa32f 888static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
63eb9546 889{
6a33091f 890 struct gspca_ctrl *ctrl;
63eb9546
JFM		 891 int i;
892
893 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
894 gspca_dev->curr_mode = i;
895 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
896 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
c2446b3e 897 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
6a33091f
JFM		 898
899 /* set the current control values to their default values
900 * which may have changed in sd_init() */
901 ctrl = gspca_dev->cam.ctrls;
902 if (ctrl != NULL) {
903 for (i = 0;
904 i < gspca_dev->sd_desc->nctrls;
905 i++, ctrl++)
906 ctrl->val = ctrl->def;
907 }
63eb9546
JFM		 908}
909
910static int wxh_to_mode(struct gspca_dev *gspca_dev,
911 int width, int height)
912{
913 int i;
914
d43fa32f
JFM		 915 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
916 if (width >= gspca_dev->cam.cam_mode[i].width
917 && height >= gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 918 break;
919 }
63eb9546
JFM		 920 return i;
921}
922
63eb9546
JFM		 923/*
924 * search a mode with the right pixel format
925 */
926static int gspca_get_mode(struct gspca_dev *gspca_dev,
927 int mode,
928 int pixfmt)
929{
930 int modeU, modeD;
931
932 modeU = modeD = mode;
933 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
934 if (--modeD >= 0) {
c2446b3e
JFM		 935 if (gspca_dev->cam.cam_mode[modeD].pixelformat
936 == pixfmt)
63eb9546
JFM		 937 return modeD;
938 }
939 if (++modeU < gspca_dev->cam.nmodes) {
c2446b3e
JFM		 940 if (gspca_dev->cam.cam_mode[modeU].pixelformat
941 == pixfmt)
63eb9546
JFM		 942 return modeU;
943 }
944 }
945 return -EINVAL;
946}
947
af1d9afa
BJ		 948#ifdef CONFIG_VIDEO_ADV_DEBUG
949static int vidioc_g_register(struct file *file, void *priv,
950 struct v4l2_dbg_register *reg)
951{
952 int ret;
953 struct gspca_dev *gspca_dev = priv;
954
955 if (!gspca_dev->sd_desc->get_chip_ident)
956 return -EINVAL;
957
958 if (!gspca_dev->sd_desc->get_register)
959 return -EINVAL;
960
961 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
962 return -ERESTARTSYS;
8c4ebae4 963 gspca_dev->usb_err = 0;
af1d9afa
BJ		 964 if (gspca_dev->present)
965 ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
966 else
967 ret = -ENODEV;
968 mutex_unlock(&gspca_dev->usb_lock);
969
970 return ret;
971}
972
973static int vidioc_s_register(struct file *file, void *priv,
974 struct v4l2_dbg_register *reg)
975{
976 int ret;
977 struct gspca_dev *gspca_dev = priv;
978
979 if (!gspca_dev->sd_desc->get_chip_ident)
980 return -EINVAL;
981
982 if (!gspca_dev->sd_desc->set_register)
983 return -EINVAL;
984
985 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
986 return -ERESTARTSYS;
8c4ebae4 987 gspca_dev->usb_err = 0;
af1d9afa
BJ		 988 if (gspca_dev->present)
989 ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
990 else
991 ret = -ENODEV;
992 mutex_unlock(&gspca_dev->usb_lock);
993
994 return ret;
995}
996#endif
997
998static int vidioc_g_chip_ident(struct file *file, void *priv,
999 struct v4l2_dbg_chip_ident *chip)
1000{
1001 int ret;
1002 struct gspca_dev *gspca_dev = priv;
1003
1004 if (!gspca_dev->sd_desc->get_chip_ident)
1005 return -EINVAL;
1006
1007 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1008 return -ERESTARTSYS;
8c4ebae4 1009 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1010 if (gspca_dev->present)
1011 ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
1012 else
1013 ret = -ENODEV;
1014 mutex_unlock(&gspca_dev->usb_lock);
1015
1016 return ret;
1017}
1018
e078770a 1019static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1020 struct v4l2_fmtdesc *fmtdesc)
1021{
1022 struct gspca_dev *gspca_dev = priv;
6a7eba24 1023 int i, j, index;
63eb9546
JFM		 1024 __u32 fmt_tb[8];
1025
63eb9546
JFM		 1026 /* give an index to each format */
1027 index = 0;
1028 j = 0;
1029 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
c2446b3e 1030 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
63eb9546
JFM		 1031 j = 0;
1032 for (;;) {
1033 if (fmt_tb[j] == fmt_tb[index])
1034 break;
1035 j++;
1036 }
1037 if (j == index) {
1038 if (fmtdesc->index == index)
1039 break; /* new format */
1040 index++;
80297125 1041 if (index >= ARRAY_SIZE(fmt_tb))
63eb9546
JFM		 1042 return -EINVAL;
1043 }
1044 }
1045 if (i < 0)
1046 return -EINVAL; /* no more format */
1047
63eb9546
JFM		 1048 fmtdesc->pixelformat = fmt_tb[index];
1049 if (gspca_is_compressed(fmt_tb[index]))
1050 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1051 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1052 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1053 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1054 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1055 fmtdesc->description[4] = '\0';
1056 return 0;
1057}
1058
e078770a 1059static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1060 struct v4l2_format *fmt)
1061{
1062 struct gspca_dev *gspca_dev = priv;
c2446b3e 1063 int mode;
63eb9546 1064
c2446b3e
JFM		 1065 mode = gspca_dev->curr_mode;
1066 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1067 sizeof fmt->fmt.pix);
63eb9546
JFM		 1068 return 0;
1069}
1070
e078770a 1071static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1072 struct v4l2_format *fmt)
1073{
24c530b4 1074 int w, h, mode, mode2;
63eb9546 1075
4aa0d037
JFM		 1076 w = fmt->fmt.pix.width;
1077 h = fmt->fmt.pix.height;
d43fa32f 1078
335b3f88 1079#ifdef GSPCA_DEBUG
63eb9546
JFM		 1080 if (gspca_debug & D_CONF)
1081 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1082#endif
1083 /* search the closest mode for width and height */
1084 mode = wxh_to_mode(gspca_dev, w, h);
1085
1086 /* OK if right palette */
c2446b3e
JFM		 1087 if (gspca_dev->cam.cam_mode[mode].pixelformat
1088 != fmt->fmt.pix.pixelformat) {
63eb9546
JFM		 1089
1090 /* else, search the closest mode with the same pixel format */
1091 mode2 = gspca_get_mode(gspca_dev, mode,
1092 fmt->fmt.pix.pixelformat);
c2446b3e 1093 if (mode2 >= 0)
63eb9546 1094 mode = mode2;
c2446b3e
JFM		 1095/* else
1096 ; * no chance, return this mode */
63eb9546 1097 }
c2446b3e
JFM		 1098 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1099 sizeof fmt->fmt.pix);
63eb9546
JFM		 1100 return mode; /* used when s_fmt */
1101}
1102
e078770a 1103static int vidioc_try_fmt_vid_cap(struct file *file,
63eb9546
JFM		 1104 void *priv,
1105 struct v4l2_format *fmt)
1106{
4aa0d037 1107 struct gspca_dev *gspca_dev = priv;
63eb9546
JFM		 1108 int ret;
1109
e078770a 1110 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1111 if (ret < 0)
1112 return ret;
1113 return 0;
1114}
1115
e078770a 1116static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1117 struct v4l2_format *fmt)
1118{
1119 struct gspca_dev *gspca_dev = priv;
d43fa32f 1120 int ret;
63eb9546 1121
e2997a72
HG		 1122 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1123 return -ERESTARTSYS;
d43fa32f 1124
e078770a 1125 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1126 if (ret < 0)
1127 goto out;
1128
d43fa32f
JFM		 1129 if (gspca_dev->nframes != 0
1130 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1131 ret = -EINVAL;
1132 goto out;
1133 }
1134
50a871fe
JFM		 1135 if (ret == gspca_dev->curr_mode) {
1136 ret = 0;
63eb9546 1137 goto out; /* same mode */
50a871fe 1138 }
d43fa32f
JFM		 1139
1140 if (gspca_dev->streaming) {
1141 ret = -EBUSY;
1142 goto out;
e2997a72 1143 }
4aa0d037
JFM		 1144 gspca_dev->width = fmt->fmt.pix.width;
1145 gspca_dev->height = fmt->fmt.pix.height;
63eb9546
JFM		 1146 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1147 gspca_dev->curr_mode = ret;
d43fa32f 1148
d43fa32f 1149 ret = 0;
63eb9546
JFM		 1150out:
1151 mutex_unlock(&gspca_dev->queue_lock);
1152 return ret;
1153}
1154
11c635a2
HG		 1155static int vidioc_enum_framesizes(struct file *file, void *priv,
1156 struct v4l2_frmsizeenum *fsize)
1157{
1158 struct gspca_dev *gspca_dev = priv;
1159 int i;
1160 __u32 index = 0;
1161
1162 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1163 if (fsize->pixel_format !=
1164 gspca_dev->cam.cam_mode[i].pixelformat)
1165 continue;
1166
1167 if (fsize->index == index) {
1168 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1169 fsize->discrete.width =
1170 gspca_dev->cam.cam_mode[i].width;
1171 fsize->discrete.height =
1172 gspca_dev->cam.cam_mode[i].height;
1173 return 0;
1174 }
1175 index++;
1176 }
1177
1178 return -EINVAL;
1179}
1180
28ffe77f
AO		 1181static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1182 struct v4l2_frmivalenum *fival)
1183{
1184 struct gspca_dev *gspca_dev = priv;
1185 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1186 __u32 i;
1187
1188 if (gspca_dev->cam.mode_framerates == NULL ||
1189 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1190 return -EINVAL;
1191
1192 if (fival->pixel_format !=
1193 gspca_dev->cam.cam_mode[mode].pixelformat)
1194 return -EINVAL;
1195
1196 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1197 if (fival->index == i) {
1198 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1199 fival->discrete.numerator = 1;
1200 fival->discrete.denominator =
1201 gspca_dev->cam.mode_framerates[mode].rates[i];
1202 return 0;
1203 }
1204 }
1205
1206 return -EINVAL;
1207}
1208
d0182306 1209static void gspca_release(struct video_device *vfd)
6b060ffe 1210{
d0182306 1211 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
6b060ffe 1212
38c7c036
LP		 1213 PDEBUG(D_PROBE, "%s released",
1214 video_device_node_name(&gspca_dev->vdev));
6b060ffe
FZ		 1215
1216 kfree(gspca_dev->usb_buf);
1217 kfree(gspca_dev);
1218}
1219
bec43661 1220static int dev_open(struct file *file)
63eb9546
JFM		 1221{
1222 struct gspca_dev *gspca_dev;
63eb9546 1223
0d07e240 1224 PDEBUG(D_STREAM, "[%s] open", current->comm);
a12ca6a6 1225 gspca_dev = (struct gspca_dev *) video_devdata(file);
7f6eb118
HG		 1226 if (!gspca_dev->present)
1227 return -ENODEV;
5c4fa002
JFM		 1228
1229 /* protect the subdriver against rmmod */
7f6eb118
HG		 1230 if (!try_module_get(gspca_dev->module))
1231 return -ENODEV;
6b060ffe 1232
63eb9546 1233 file->private_data = gspca_dev;
335b3f88 1234#ifdef GSPCA_DEBUG
63eb9546 1235 /* activate the v4l2 debug */
d43fa32f 1236 if (gspca_debug & D_V4L2)
a12ca6a6 1237 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
9de436cf 1238 | V4L2_DEBUG_IOCTL_ARG;
63eb9546 1239 else
a12ca6a6 1240 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
9de436cf 1241 | V4L2_DEBUG_IOCTL_ARG);
63eb9546 1242#endif
7f6eb118 1243 return 0;
63eb9546
JFM		 1244}
1245
bec43661 1246static int dev_close(struct file *file)
63eb9546
JFM		 1247{
1248 struct gspca_dev *gspca_dev = file->private_data;
1249
0d07e240 1250 PDEBUG(D_STREAM, "[%s] close", current->comm);
e2997a72
HG		 1251 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1252 return -ERESTARTSYS;
e2997a72 1253
5b77ae77 1254 /* if the file did the capture, free the streaming resources */
4aa0d037 1255 if (gspca_dev->capt_file == file) {
a1e8288b
JFM		 1256 if (gspca_dev->streaming) {
1257 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1258 gspca_dev->usb_err = 0;
a1e8288b
JFM		 1259 gspca_stream_off(gspca_dev);
1260 mutex_unlock(&gspca_dev->usb_lock);
1261 }
4aa0d037 1262 frame_free(gspca_dev);
4aa0d037 1263 }
d43fa32f 1264 file->private_data = NULL;
5c4fa002 1265 module_put(gspca_dev->module);
63eb9546 1266 mutex_unlock(&gspca_dev->queue_lock);
6b060ffe 1267
d43fa32f 1268 PDEBUG(D_STREAM, "close done");
6b060ffe 1269
63eb9546
JFM		 1270 return 0;
1271}
1272
1273static int vidioc_querycap(struct file *file, void *priv,
1274 struct v4l2_capability *cap)
1275{
1276 struct gspca_dev *gspca_dev = priv;
090264e5 1277 int ret;
63eb9546 1278
090264e5
JFM		 1279 /* protect the access to the usb device */
1280 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1281 return -ERESTARTSYS;
1282 if (!gspca_dev->present) {
1283 ret = -ENODEV;
1284 goto out;
1285 }
e7d712cc 1286 strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
d8518590 1287 sizeof cap->driver);
c6edaf16 1288 if (gspca_dev->dev->product != NULL) {
e7d712cc 1289 strlcpy((char *) cap->card, gspca_dev->dev->product,
c6edaf16
JFM		 1290 sizeof cap->card);
1291 } else {
d8518590 1292 snprintf((char *) cap->card, sizeof cap->card,
c6edaf16
JFM		 1293 "USB Camera (%04x:%04x)",
1294 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1295 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1296 }
d8518590
JFM		 1297 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1298 sizeof(cap->bus_info));
63eb9546
JFM		 1299 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
1300 | V4L2_CAP_STREAMING
1301 | V4L2_CAP_READWRITE;
090264e5
JFM		 1302 ret = 0;
1303out:
1304 mutex_unlock(&gspca_dev->usb_lock);
1305 return ret;
63eb9546
JFM		 1306}
1307
6a33091f 1308static int get_ctrl(struct gspca_dev *gspca_dev,
a0001a28
HG		 1309 int id)
1310{
1311 const struct ctrl *ctrls;
1312 int i;
1313
1314 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1315 i < gspca_dev->sd_desc->nctrls;
1316 i++, ctrls++) {
1317 if (gspca_dev->ctrl_dis & (1 << i))
1318 continue;
1319 if (id == ctrls->qctrl.id)
6a33091f 1320 return i;
a0001a28 1321 }
6a33091f 1322 return -1;
a0001a28
HG		 1323}
1324
63eb9546
JFM		 1325static int vidioc_queryctrl(struct file *file, void *priv,
1326 struct v4l2_queryctrl *q_ctrl)
1327{
1328 struct gspca_dev *gspca_dev = priv;
a0001a28 1329 const struct ctrl *ctrls;
6a33091f
JFM		 1330 struct gspca_ctrl *gspca_ctrl;
1331 int i, idx;
6a7eba24
JFM		 1332 u32 id;
1333
1334 id = q_ctrl->id;
1335 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1336 id &= V4L2_CTRL_ID_MASK;
1337 id++;
6a33091f 1338 idx = -1;
6a7eba24 1339 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
a0001a28 1340 if (gspca_dev->ctrl_dis & (1 << i))
f50ba1be 1341 continue;
b8bfb5fb 1342 if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
f50ba1be 1343 continue;
6a33091f
JFM		 1344 if (idx >= 0
1345 && gspca_dev->sd_desc->ctrls[i].qctrl.id
780e3121 1346 > gspca_dev->sd_desc->ctrls[idx].qctrl.id)
b8bfb5fb 1347 continue;
6a33091f 1348 idx = i;
63eb9546 1349 }
a0001a28 1350 } else {
6a33091f 1351 idx = get_ctrl(gspca_dev, id);
63eb9546 1352 }
6a33091f
JFM		 1353 if (idx < 0)
1354 return -EINVAL;
1355 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1356 memcpy(q_ctrl, &ctrls->qctrl, sizeof *q_ctrl);
1357 if (gspca_dev->cam.ctrls != NULL) {
1358 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1359 q_ctrl->default_value = gspca_ctrl->def;
1360 q_ctrl->minimum = gspca_ctrl->min;
1361 q_ctrl->maximum = gspca_ctrl->max;
1362 }
1363 if (gspca_dev->ctrl_inac & (1 << idx))
4af85668 1364 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
f50ba1be 1365 return 0;
63eb9546
JFM		 1366}
1367
1368static int vidioc_s_ctrl(struct file *file, void *priv,
1369 struct v4l2_control *ctrl)
1370{
1371 struct gspca_dev *gspca_dev = priv;
a5ae2062 1372 const struct ctrl *ctrls;
6a33091f
JFM		 1373 struct gspca_ctrl *gspca_ctrl;
1374 int idx, ret;
63eb9546 1375
6a33091f
JFM		 1376 idx = get_ctrl(gspca_dev, ctrl->id);
1377 if (idx < 0)
a0001a28 1378 return -EINVAL;
6a33091f
JFM		 1379 if (gspca_dev->ctrl_inac & (1 << idx))
1380 return -EINVAL;
1381 ctrls = &gspca_dev->sd_desc->ctrls[idx];
1382 if (gspca_dev->cam.ctrls != NULL) {
1383 gspca_ctrl = &gspca_dev->cam.ctrls[idx];
1384 if (ctrl->value < gspca_ctrl->min
1385 || ctrl->value > gspca_ctrl->max)
1386 return -ERANGE;
1387 } else {
1388 gspca_ctrl = NULL;
1389 if (ctrl->value < ctrls->qctrl.minimum
1390 || ctrl->value > ctrls->qctrl.maximum)
1391 return -ERANGE;
1392 }
a0001a28
HG		 1393 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1394 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1395 return -ERESTARTSYS;
6a33091f
JFM		 1396 if (!gspca_dev->present) {
1397 ret = -ENODEV;
1398 goto out;
1399 }
8c4ebae4 1400 gspca_dev->usb_err = 0;
6a33091f 1401 if (ctrls->set != NULL) {
a0001a28 1402 ret = ctrls->set(gspca_dev, ctrl->value);
6a33091f
JFM		 1403 goto out;
1404 }
1405 if (gspca_ctrl != NULL) {
1406 gspca_ctrl->val = ctrl->value;
1407 if (ctrls->set_control != NULL
1408 && gspca_dev->streaming)
1409 ctrls->set_control(gspca_dev);
1410 }
1411 ret = gspca_dev->usb_err;
1412out:
a0001a28
HG		 1413 mutex_unlock(&gspca_dev->usb_lock);
1414 return ret;
63eb9546
JFM		 1415}
1416
1417static int vidioc_g_ctrl(struct file *file, void *priv,
1418 struct v4l2_control *ctrl)
1419{
1420 struct gspca_dev *gspca_dev = priv;
a5ae2062 1421 const struct ctrl *ctrls;
6a33091f 1422 int idx, ret;
63eb9546 1423
6a33091f
JFM		 1424 idx = get_ctrl(gspca_dev, ctrl->id);
1425 if (idx < 0)
a0001a28 1426 return -EINVAL;
6a33091f 1427 ctrls = &gspca_dev->sd_desc->ctrls[idx];
a0001a28
HG		 1428
1429 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1430 return -ERESTARTSYS;
6a33091f
JFM		 1431 if (!gspca_dev->present) {
1432 ret = -ENODEV;
1433 goto out;
1434 }
8c4ebae4 1435 gspca_dev->usb_err = 0;
6a33091f 1436 if (ctrls->get != NULL) {
a0001a28 1437 ret = ctrls->get(gspca_dev, &ctrl->value);
6a33091f
JFM		 1438 goto out;
1439 }
1440 if (gspca_dev->cam.ctrls != NULL)
1441 ctrl->value = gspca_dev->cam.ctrls[idx].val;
1442 ret = 0;
1443out:
a0001a28
HG		 1444 mutex_unlock(&gspca_dev->usb_lock);
1445 return ret;
63eb9546
JFM		 1446}
1447
1448static int vidioc_querymenu(struct file *file, void *priv,
1449 struct v4l2_querymenu *qmenu)
1450{
1451 struct gspca_dev *gspca_dev = priv;
1452
1453 if (!gspca_dev->sd_desc->querymenu)
1454 return -EINVAL;
1455 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1456}
1457
1458static int vidioc_enum_input(struct file *file, void *priv,
1459 struct v4l2_input *input)
1460{
1461 struct gspca_dev *gspca_dev = priv;
1462
1463 if (input->index != 0)
1464 return -EINVAL;
63eb9546 1465 input->type = V4L2_INPUT_TYPE_CAMERA;
dfa76fa2 1466 input->status = gspca_dev->cam.input_flags;
e7d712cc 1467 strlcpy(input->name, gspca_dev->sd_desc->name,
63eb9546
JFM		 1468 sizeof input->name);
1469 return 0;
1470}
1471
1472static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1473{
1474 *i = 0;
1475 return 0;
1476}
1477
1478static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1479{
1480 if (i > 0)
1481 return -EINVAL;
1482 return (0);
1483}
1484
1485static int vidioc_reqbufs(struct file *file, void *priv,
1486 struct v4l2_requestbuffers *rb)
1487{
1488 struct gspca_dev *gspca_dev = priv;
832d0a91 1489 int i, ret = 0, streaming;
63eb9546 1490
a2ba6f27
JFM		 1491 i = rb->memory; /* (avoid compilation warning) */
1492 switch (i) {
5b77ae77 1493 case GSPCA_MEMORY_READ: /* (internal call) */
d43fa32f 1494 case V4L2_MEMORY_MMAP:
d43fa32f 1495 case V4L2_MEMORY_USERPTR:
6a7eba24 1496 break;
d43fa32f 1497 default:
63eb9546 1498 return -EINVAL;
d43fa32f 1499 }
e2997a72
HG		 1500 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1501 return -ERESTARTSYS;
d43fa32f 1502
5b77ae77 1503 if (gspca_dev->memory != GSPCA_MEMORY_NO
ce5610bc 1504 && gspca_dev->memory != GSPCA_MEMORY_READ
5b77ae77 1505 && gspca_dev->memory != rb->memory) {
4aa0d037
JFM		 1506 ret = -EBUSY;
1507 goto out;
1508 }
d43fa32f 1509
5b77ae77
JFM		 1510 /* only one file may do the capture */
1511 if (gspca_dev->capt_file != NULL
1512 && gspca_dev->capt_file != file) {
1513 ret = -EBUSY;
1514 goto out;
1515 }
1516
1517 /* if allocated, the buffers must not be mapped */
1518 for (i = 0; i < gspca_dev->nframes; i++) {
1519 if (gspca_dev->frame[i].vma_use_count) {
ac0d6df6
JFM		 1520 ret = -EBUSY;
1521 goto out;
1522 }
5b77ae77
JFM		 1523 }
1524
1525 /* stop streaming */
832d0a91
JFM		 1526 streaming = gspca_dev->streaming;
1527 if (streaming) {
5b77ae77 1528 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1529 gspca_dev->usb_err = 0;
5b77ae77
JFM		 1530 gspca_stream_off(gspca_dev);
1531 mutex_unlock(&gspca_dev->usb_lock);
59929cef
JFM		 1532
1533 /* Don't restart the stream when switching from read
1534 * to mmap mode */
1535 if (gspca_dev->memory == GSPCA_MEMORY_READ)
1536 streaming = 0;
5b77ae77
JFM		 1537 }
1538
1539 /* free the previous allocated buffers, if any */
d642de2e 1540 if (gspca_dev->nframes != 0)
5b77ae77 1541 frame_free(gspca_dev);
5b77ae77
JFM		 1542 if (rb->count == 0) /* unrequest */
1543 goto out;
d642de2e 1544 ret = frame_alloc(gspca_dev, file, rb->memory, rb->count);
5b77ae77
JFM		 1545 if (ret == 0) {
1546 rb->count = gspca_dev->nframes;
832d0a91
JFM		 1547 if (streaming)
1548 ret = gspca_init_transfer(gspca_dev);
4aa0d037
JFM		 1549 }
1550out:
63eb9546
JFM		 1551 mutex_unlock(&gspca_dev->queue_lock);
1552 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1553 return ret;
1554}
1555
1556static int vidioc_querybuf(struct file *file, void *priv,
1557 struct v4l2_buffer *v4l2_buf)
1558{
1559 struct gspca_dev *gspca_dev = priv;
1560 struct gspca_frame *frame;
1561
13752bd9 1562 if (v4l2_buf->index < 0
63eb9546
JFM		 1563 || v4l2_buf->index >= gspca_dev->nframes)
1564 return -EINVAL;
1565
1566 frame = &gspca_dev->frame[v4l2_buf->index];
1567 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1568 return 0;
1569}
1570
1571static int vidioc_streamon(struct file *file, void *priv,
1572 enum v4l2_buf_type buf_type)
1573{
1574 struct gspca_dev *gspca_dev = priv;
1575 int ret;
1576
63eb9546
JFM		 1577 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1578 return -EINVAL;
e2997a72
HG		 1579 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1580 return -ERESTARTSYS;
090264e5 1581
18bf99aa
JFM		 1582 /* check the capture file */
1583 if (gspca_dev->capt_file != file) {
1584 ret = -EBUSY;
1585 goto out;
1586 }
1587
1edabe71
JFM		 1588 if (gspca_dev->nframes == 0
1589 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
63eb9546
JFM		 1590 ret = -EINVAL;
1591 goto out;
1592 }
1593 if (!gspca_dev->streaming) {
1594 ret = gspca_init_transfer(gspca_dev);
1595 if (ret < 0)
1596 goto out;
1597 }
335b3f88 1598#ifdef GSPCA_DEBUG
63eb9546
JFM		 1599 if (gspca_debug & D_STREAM) {
1600 PDEBUG_MODE("stream on OK",
1601 gspca_dev->pixfmt,
1602 gspca_dev->width,
1603 gspca_dev->height);
1604 }
1605#endif
e2997a72 1606 ret = 0;
63eb9546
JFM		 1607out:
1608 mutex_unlock(&gspca_dev->queue_lock);
1609 return ret;
1610}
1611
1612static int vidioc_streamoff(struct file *file, void *priv,
1613 enum v4l2_buf_type buf_type)
1614{
1615 struct gspca_dev *gspca_dev = priv;
f7059eaa 1616 int ret;
63eb9546 1617
63eb9546
JFM		 1618 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1619 return -EINVAL;
4e770f76 1620
4aa0d037
JFM		 1621 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1622 return -ERESTARTSYS;
5b77ae77 1623
4e770f76
HG		 1624 if (!gspca_dev->streaming) {
1625 ret = 0;
1626 goto out;
1627 }
1628
18bf99aa
JFM		 1629 /* check the capture file */
1630 if (gspca_dev->capt_file != file) {
1631 ret = -EBUSY;
1632 goto out;
1633 }
1634
5b77ae77 1635 /* stop streaming */
4aa0d037
JFM		 1636 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1637 ret = -ERESTARTSYS;
1638 goto out;
63eb9546 1639 }
8c4ebae4 1640 gspca_dev->usb_err = 0;
4aa0d037 1641 gspca_stream_off(gspca_dev);
4aa0d037 1642 mutex_unlock(&gspca_dev->usb_lock);
0d0ae15d
HG		 1643 /* In case another thread is waiting in dqbuf */
1644 wake_up_interruptible(&gspca_dev->wq);
5b77ae77 1645
f7059eaa
JFM		 1646 /* empty the transfer queues */
1647 atomic_set(&gspca_dev->fr_q, 0);
1648 atomic_set(&gspca_dev->fr_i, 0);
1649 gspca_dev->fr_o = 0;
5b77ae77 1650 ret = 0;
4aa0d037
JFM		 1651out:
1652 mutex_unlock(&gspca_dev->queue_lock);
1653 return ret;
63eb9546
JFM		 1654}
1655
1656static int vidioc_g_jpegcomp(struct file *file, void *priv,
1657 struct v4l2_jpegcompression *jpegcomp)
1658{
1659 struct gspca_dev *gspca_dev = priv;
1660 int ret;
1661
1662 if (!gspca_dev->sd_desc->get_jcomp)
1663 return -EINVAL;
e2997a72
HG		 1664 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1665 return -ERESTARTSYS;
8c4ebae4 1666 gspca_dev->usb_err = 0;
090264e5
JFM		 1667 if (gspca_dev->present)
1668 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1669 else
1670 ret = -ENODEV;
63eb9546
JFM		 1671 mutex_unlock(&gspca_dev->usb_lock);
1672 return ret;
1673}
1674
1675static int vidioc_s_jpegcomp(struct file *file, void *priv,
1676 struct v4l2_jpegcompression *jpegcomp)
1677{
1678 struct gspca_dev *gspca_dev = priv;
1679 int ret;
1680
63eb9546
JFM		 1681 if (!gspca_dev->sd_desc->set_jcomp)
1682 return -EINVAL;
f86d4a91
JP		 1683 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1684 return -ERESTARTSYS;
8c4ebae4 1685 gspca_dev->usb_err = 0;
090264e5
JFM		 1686 if (gspca_dev->present)
1687 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1688 else
1689 ret = -ENODEV;
63eb9546
JFM		 1690 mutex_unlock(&gspca_dev->usb_lock);
1691 return ret;
1692}
1693
1694static int vidioc_g_parm(struct file *filp, void *priv,
1695 struct v4l2_streamparm *parm)
1696{
1697 struct gspca_dev *gspca_dev = priv;
1698
63eb9546 1699 parm->parm.capture.readbuffers = gspca_dev->nbufread;
627a5ef7
JP		 1700
1701 if (gspca_dev->sd_desc->get_streamparm) {
1702 int ret;
1703
1704 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1705 return -ERESTARTSYS;
668f44a6
JFM		 1706 if (gspca_dev->present) {
1707 gspca_dev->usb_err = 0;
1708 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1709 ret = gspca_dev->usb_err;
1710 } else {
090264e5 1711 ret = -ENODEV;
668f44a6 1712 }
627a5ef7
JP		 1713 mutex_unlock(&gspca_dev->usb_lock);
1714 return ret;
1715 }
1716
63eb9546
JFM		 1717 return 0;
1718}
1719
1720static int vidioc_s_parm(struct file *filp, void *priv,
1721 struct v4l2_streamparm *parm)
1722{
1723 struct gspca_dev *gspca_dev = priv;
1724 int n;
1725
63eb9546 1726 n = parm->parm.capture.readbuffers;
f7059eaa 1727 if (n == 0 || n >= GSPCA_MAX_FRAMES)
63eb9546
JFM		 1728 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1729 else
1730 gspca_dev->nbufread = n;
627a5ef7
JP		 1731
1732 if (gspca_dev->sd_desc->set_streamparm) {
1733 int ret;
1734
1735 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1736 return -ERESTARTSYS;
668f44a6
JFM		 1737 if (gspca_dev->present) {
1738 gspca_dev->usb_err = 0;
1739 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1740 ret = gspca_dev->usb_err;
1741 } else {
090264e5 1742 ret = -ENODEV;
668f44a6 1743 }
627a5ef7
JP		 1744 mutex_unlock(&gspca_dev->usb_lock);
1745 return ret;
1746 }
1747
63eb9546
JFM		 1748 return 0;
1749}
1750
63eb9546
JFM		 1751static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1752{
1753 struct gspca_dev *gspca_dev = file->private_data;
efab8211 1754 struct gspca_frame *frame;
63eb9546
JFM		 1755 struct page *page;
1756 unsigned long addr, start, size;
1757 int i, ret;
63eb9546
JFM		 1758
1759 start = vma->vm_start;
1760 size = vma->vm_end - vma->vm_start;
1761 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1762
e2997a72
HG		 1763 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1764 return -ERESTARTSYS;
63eb9546
JFM		 1765 if (!gspca_dev->present) {
1766 ret = -ENODEV;
4aa0d037
JFM		 1767 goto out;
1768 }
1769 if (gspca_dev->capt_file != file) {
1770 ret = -EINVAL;
1771 goto out;
63eb9546
JFM		 1772 }
1773
efab8211 1774 frame = NULL;
63eb9546
JFM		 1775 for (i = 0; i < gspca_dev->nframes; ++i) {
1776 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1777 PDEBUG(D_STREAM, "mmap bad memory type");
1778 break;
1779 }
1780 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1781 == vma->vm_pgoff) {
1782 frame = &gspca_dev->frame[i];
1783 break;
1784 }
1785 }
efab8211 1786 if (frame == NULL) {
63eb9546
JFM		 1787 PDEBUG(D_STREAM, "mmap no frame buffer found");
1788 ret = -EINVAL;
4aa0d037 1789 goto out;
63eb9546 1790 }
38bff697 1791 if (size != frame->v4l2_buf.length) {
63eb9546
JFM		 1792 PDEBUG(D_STREAM, "mmap bad size");
1793 ret = -EINVAL;
4aa0d037 1794 goto out;
63eb9546
JFM		 1795 }
1796
1797 /*
1798 * - VM_IO marks the area as being a mmaped region for I/O to a
1799 * device. It also prevents the region from being core dumped.
1800 */
1801 vma->vm_flags |= VM_IO;
1802
1803 addr = (unsigned long) frame->data;
1804 while (size > 0) {
1805 page = vmalloc_to_page((void *) addr);
1806 ret = vm_insert_page(vma, start, page);
1807 if (ret < 0)
4aa0d037 1808 goto out;
63eb9546
JFM		 1809 start += PAGE_SIZE;
1810 addr += PAGE_SIZE;
1811 size -= PAGE_SIZE;
1812 }
1813
d50e257e 1814 vma->vm_ops = &gspca_vm_ops;
63eb9546
JFM		 1815 vma->vm_private_data = frame;
1816 gspca_vm_open(vma);
e2997a72 1817 ret = 0;
4aa0d037 1818out:
63eb9546
JFM		 1819 mutex_unlock(&gspca_dev->queue_lock);
1820 return ret;
1821}
1822
27074efa
HG		 1823static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file,
1824 enum v4l2_memory memory)
1825{
1826 if (!gspca_dev->present)
1827 return -ENODEV;
1828 if (gspca_dev->capt_file != file || gspca_dev->memory != memory ||
1829 !gspca_dev->streaming)
1830 return -EINVAL;
1831
1832 /* check if a frame is ready */
1833 return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i);
1834}
1835
1836static int frame_ready(struct gspca_dev *gspca_dev, struct file *file,
1837 enum v4l2_memory memory)
1838{
1839 int ret;
1840
1841 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1842 return -ERESTARTSYS;
1843 ret = frame_ready_nolock(gspca_dev, file, memory);
1844 mutex_unlock(&gspca_dev->queue_lock);
1845 return ret;
1846}
1847
63eb9546 1848/*
27074efa 1849 * dequeue a video buffer
63eb9546 1850 *
27074efa 1851 * If nonblock_ing is false, block until a buffer is available.
63eb9546 1852 */
27074efa
HG		 1853static int vidioc_dqbuf(struct file *file, void *priv,
1854 struct v4l2_buffer *v4l2_buf)
63eb9546 1855{
27074efa
HG		 1856 struct gspca_dev *gspca_dev = priv;
1857 struct gspca_frame *frame;
1858 int i, j, ret;
63eb9546 1859
27074efa
HG		 1860 PDEBUG(D_FRAM, "dqbuf");
1861
1862 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1863 return -ERESTARTSYS;
1864
1865 for (;;) {
1866 ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory);
1867 if (ret < 0)
1868 goto out;
1869 if (ret > 0)
1870 break;
1871
1872 mutex_unlock(&gspca_dev->queue_lock);
1873
1874 if (file->f_flags & O_NONBLOCK)
181b704f
HG		 1875 return -EAGAIN;
1876
1877 /* wait till a frame is ready */
4aa0d037 1878 ret = wait_event_interruptible_timeout(gspca_dev->wq,
27074efa 1879 frame_ready(gspca_dev, file, v4l2_buf->memory),
181b704f
HG		 1880 msecs_to_jiffies(3000));
1881 if (ret < 0)
1882 return ret;
27074efa 1883 if (ret == 0)
e2997a72 1884 return -EIO;
27074efa
HG		 1885
1886 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1887 return -ERESTARTSYS;
63eb9546 1888 }
181b704f 1889
27074efa
HG		 1890 i = gspca_dev->fr_o;
1891 j = gspca_dev->fr_queue[i];
1892 frame = &gspca_dev->frame[j];
1893
f7059eaa 1894 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
e2997a72 1895
739570bb
JFM		 1896 if (gspca_dev->sd_desc->dq_callback) {
1897 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1898 gspca_dev->usb_err = 0;
090264e5
JFM		 1899 if (gspca_dev->present)
1900 gspca_dev->sd_desc->dq_callback(gspca_dev);
739570bb
JFM		 1901 mutex_unlock(&gspca_dev->usb_lock);
1902 }
5b77ae77 1903
4a82bc60
HG		 1904 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1905 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1906 PDEBUG(D_FRAM, "dqbuf %d", j);
1907 ret = 0;
1908
ac0d6df6 1909 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
c6eb8eaf 1910 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
ac0d6df6
JFM		 1911 frame->data,
1912 frame->v4l2_buf.bytesused)) {
1913 PDEBUG(D_ERR|D_STREAM,
1914 "dqbuf cp to user failed");
1915 ret = -EFAULT;
ac0d6df6
JFM		 1916 }
1917 }
4aa0d037 1918out:
27074efa 1919 mutex_unlock(&gspca_dev->queue_lock);
63eb9546
JFM		 1920 return ret;
1921}
1922
1923/*
1924 * queue a video buffer
1925 *
1926 * Attempting to queue a buffer that has already been
1927 * queued will return -EINVAL.
1928 */
1929static int vidioc_qbuf(struct file *file, void *priv,
1930 struct v4l2_buffer *v4l2_buf)
1931{
1932 struct gspca_dev *gspca_dev = priv;
1933 struct gspca_frame *frame;
1934 int i, index, ret;
1935
1936 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
63eb9546 1937
5b77ae77
JFM		 1938 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1939 return -ERESTARTSYS;
1940
63eb9546
JFM		 1941 index = v4l2_buf->index;
1942 if ((unsigned) index >= gspca_dev->nframes) {
d43fa32f 1943 PDEBUG(D_FRAM,
63eb9546 1944 "qbuf idx %d >= %d", index, gspca_dev->nframes);
5b77ae77
JFM		 1945 ret = -EINVAL;
1946 goto out;
63eb9546 1947 }
5b77ae77 1948 if (v4l2_buf->memory != gspca_dev->memory) {
d43fa32f 1949 PDEBUG(D_FRAM, "qbuf bad memory type");
5b77ae77
JFM		 1950 ret = -EINVAL;
1951 goto out;
63eb9546 1952 }
e2997a72 1953
5b77ae77 1954 frame = &gspca_dev->frame[index];
d43fa32f
JFM		 1955 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1956 PDEBUG(D_FRAM, "qbuf bad state");
63eb9546
JFM		 1957 ret = -EINVAL;
1958 goto out;
1959 }
1960
1961 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
63eb9546 1962
d43fa32f 1963 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
63eb9546
JFM		 1964 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
1965 frame->v4l2_buf.length = v4l2_buf->length;
1966 }
1967
1968 /* put the buffer in the 'queued' queue */
f7059eaa 1969 i = atomic_read(&gspca_dev->fr_q);
63eb9546 1970 gspca_dev->fr_queue[i] = index;
f7059eaa 1971 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
63eb9546
JFM		 1972
1973 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
1974 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
1975 ret = 0;
1976out:
1977 mutex_unlock(&gspca_dev->queue_lock);
1978 return ret;
1979}
1980
d43fa32f
JFM		 1981/*
1982 * allocate the resources for read()
1983 */
1984static int read_alloc(struct gspca_dev *gspca_dev,
1985 struct file *file)
63eb9546 1986{
63eb9546 1987 struct v4l2_buffer v4l2_buf;
d43fa32f 1988 int i, ret;
63eb9546 1989
d43fa32f 1990 PDEBUG(D_STREAM, "read alloc");
63eb9546
JFM		 1991 if (gspca_dev->nframes == 0) {
1992 struct v4l2_requestbuffers rb;
1993
1994 memset(&rb, 0, sizeof rb);
1995 rb.count = gspca_dev->nbufread;
1996 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 1997 rb.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 1998 ret = vidioc_reqbufs(file, gspca_dev, &rb);
1999 if (ret != 0) {
d43fa32f 2000 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
63eb9546
JFM		 2001 return ret;
2002 }
2003 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2004 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2005 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2006 for (i = 0; i < gspca_dev->nbufread; i++) {
2007 v4l2_buf.index = i;
63eb9546
JFM		 2008 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2009 if (ret != 0) {
2010 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
2011 return ret;
2012 }
2013 }
d43fa32f
JFM		 2014 gspca_dev->memory = GSPCA_MEMORY_READ;
2015 }
4aa0d037 2016
d43fa32f
JFM		 2017 /* start streaming */
2018 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
2019 if (ret != 0)
2020 PDEBUG(D_STREAM, "read streamon err %d", ret);
2021 return ret;
2022}
2023
2024static unsigned int dev_poll(struct file *file, poll_table *wait)
2025{
2026 struct gspca_dev *gspca_dev = file->private_data;
f7059eaa 2027 int ret;
d43fa32f
JFM		 2028
2029 PDEBUG(D_FRAM, "poll");
2030
2031 poll_wait(file, &gspca_dev->wq, wait);
d43fa32f 2032
5b77ae77 2033 /* if reqbufs is not done, the user would use read() */
ee362991 2034 if (gspca_dev->memory == GSPCA_MEMORY_NO) {
d43fa32f 2035 ret = read_alloc(gspca_dev, file);
5b77ae77
JFM		 2036 if (ret != 0)
2037 return POLLERR;
63eb9546
JFM		 2038 }
2039
d43fa32f
JFM		 2040 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
2041 return POLLERR;
d43fa32f 2042
f7059eaa
JFM		 2043 /* check if an image has been received */
2044 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
2045 ret = POLLIN | POLLRDNORM; /* yes */
d43fa32f
JFM		 2046 else
2047 ret = 0;
d43fa32f 2048 mutex_unlock(&gspca_dev->queue_lock);
090264e5
JFM		 2049 if (!gspca_dev->present)
2050 return POLLHUP;
d43fa32f
JFM		 2051 return ret;
2052}
2053
2054static ssize_t dev_read(struct file *file, char __user *data,
2055 size_t count, loff_t *ppos)
2056{
2057 struct gspca_dev *gspca_dev = file->private_data;
2058 struct gspca_frame *frame;
2059 struct v4l2_buffer v4l2_buf;
2060 struct timeval timestamp;
82643d0e 2061 int n, ret, ret2;
d43fa32f 2062
a9e11134 2063 PDEBUG(D_FRAM, "read (%zd)", count);
d43fa32f
JFM		 2064 if (!gspca_dev->present)
2065 return -ENODEV;
ee362991 2066 if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */
d43fa32f
JFM		 2067 ret = read_alloc(gspca_dev, file);
2068 if (ret != 0)
2069 return ret;
d43fa32f
JFM		 2070 }
2071
63eb9546 2072 /* get a frame */
2f51d00f 2073 timestamp = ktime_to_timeval(ktime_get());
63eb9546 2074 timestamp.tv_sec--;
82643d0e
JFM		 2075 n = 2;
2076 for (;;) {
63eb9546
JFM		 2077 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2078 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2079 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2080 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2081 if (ret != 0) {
2082 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2083 return ret;
2084 }
2085
2086 /* if the process slept for more than 1 second,
219423c1 2087 * get a newer frame */
63eb9546 2088 frame = &gspca_dev->frame[v4l2_buf.index];
82643d0e
JFM		 2089 if (--n < 0)
2090 break; /* avoid infinite loop */
63eb9546
JFM		 2091 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2092 break;
2093 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2094 if (ret != 0) {
2095 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2096 return ret;
2097 }
2098 }
2099
2100 /* copy the frame */
ac0d6df6
JFM		 2101 if (count > frame->v4l2_buf.bytesused)
2102 count = frame->v4l2_buf.bytesused;
63eb9546
JFM		 2103 ret = copy_to_user(data, frame->data, count);
2104 if (ret != 0) {
2105 PDEBUG(D_ERR|D_STREAM,
a9e11134 2106 "read cp to user lack %d / %zd", ret, count);
63eb9546
JFM		 2107 ret = -EFAULT;
2108 goto out;
2109 }
2110 ret = count;
2111out:
2112 /* in each case, requeue the buffer */
2113 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2114 if (ret2 != 0)
2115 return ret2;
2116 return ret;
2117}
2118
bec43661 2119static struct v4l2_file_operations dev_fops = {
63eb9546
JFM		 2120 .owner = THIS_MODULE,
2121 .open = dev_open,
2122 .release = dev_close,
2123 .read = dev_read,
2124 .mmap = dev_mmap,
bec43661 2125 .unlocked_ioctl = video_ioctl2,
63eb9546
JFM		 2126 .poll = dev_poll,
2127};
2128
a399810c 2129static const struct v4l2_ioctl_ops dev_ioctl_ops = {
63eb9546
JFM		 2130 .vidioc_querycap = vidioc_querycap,
2131 .vidioc_dqbuf = vidioc_dqbuf,
2132 .vidioc_qbuf = vidioc_qbuf,
e078770a
MCC		 2133 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2134 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2135 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2136 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
63eb9546
JFM		 2137 .vidioc_streamon = vidioc_streamon,
2138 .vidioc_queryctrl = vidioc_queryctrl,
2139 .vidioc_g_ctrl = vidioc_g_ctrl,
2140 .vidioc_s_ctrl = vidioc_s_ctrl,
2141 .vidioc_querymenu = vidioc_querymenu,
2142 .vidioc_enum_input = vidioc_enum_input,
2143 .vidioc_g_input = vidioc_g_input,
2144 .vidioc_s_input = vidioc_s_input,
2145 .vidioc_reqbufs = vidioc_reqbufs,
2146 .vidioc_querybuf = vidioc_querybuf,
2147 .vidioc_streamoff = vidioc_streamoff,
2148 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2149 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2150 .vidioc_g_parm = vidioc_g_parm,
2151 .vidioc_s_parm = vidioc_s_parm,
11c635a2 2152 .vidioc_enum_framesizes = vidioc_enum_framesizes,
28ffe77f 2153 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
af1d9afa
BJ		 2154#ifdef CONFIG_VIDEO_ADV_DEBUG
2155 .vidioc_g_register = vidioc_g_register,
2156 .vidioc_s_register = vidioc_s_register,
2157#endif
2158 .vidioc_g_chip_ident = vidioc_g_chip_ident,
63eb9546
JFM		 2159};
2160
59929cef 2161static const struct video_device gspca_template = {
a399810c 2162 .name = "gspca main driver",
a399810c
HV		 2163 .fops = &dev_fops,
2164 .ioctl_ops = &dev_ioctl_ops,
d0182306 2165 .release = gspca_release,
a399810c
HV		 2166};
2167
6a33091f
JFM		 2168/* initialize the controls */
2169static void ctrls_init(struct gspca_dev *gspca_dev)
2170{
2171 struct gspca_ctrl *ctrl;
2172 int i;
2173
2174 for (i = 0, ctrl = gspca_dev->cam.ctrls;
2175 i < gspca_dev->sd_desc->nctrls;
2176 i++, ctrl++) {
2177 ctrl->def = gspca_dev->sd_desc->ctrls[i].qctrl.default_value;
2178 ctrl->val = ctrl->def;
2179 ctrl->min = gspca_dev->sd_desc->ctrls[i].qctrl.minimum;
2180 ctrl->max = gspca_dev->sd_desc->ctrls[i].qctrl.maximum;
2181 }
2182}
2183
63eb9546
JFM		 2184/*
2185 * probe and create a new gspca device
2186 *
2187 * This function must be called by the sub-driver when it is
2188 * called for probing a new device.
2189 */
4462864d 2190int gspca_dev_probe2(struct usb_interface *intf,
63eb9546
JFM		 2191 const struct usb_device_id *id,
2192 const struct sd_desc *sd_desc,
d43fa32f
JFM		 2193 int dev_size,
2194 struct module *module)
63eb9546 2195{
63eb9546
JFM		 2196 struct gspca_dev *gspca_dev;
2197 struct usb_device *dev = interface_to_usbdev(intf);
2198 int ret;
63eb9546 2199
6a7eba24 2200 PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
63eb9546 2201
63eb9546
JFM		 2202 /* create the device */
2203 if (dev_size < sizeof *gspca_dev)
2204 dev_size = sizeof *gspca_dev;
2205 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
e293e599 2206 if (!gspca_dev) {
133a9fe9 2207 pr_err("couldn't kzalloc gspca struct\n");
e293e599 2208 return -ENOMEM;
63eb9546 2209 }
8295d99e
JFM		 2210 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2211 if (!gspca_dev->usb_buf) {
133a9fe9 2212 pr_err("out of memory\n");
e293e599 2213 ret = -ENOMEM;
8295d99e
JFM		 2214 goto out;
2215 }
63eb9546 2216 gspca_dev->dev = dev;
4462864d 2217 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
d43fa32f 2218 gspca_dev->nbalt = intf->num_altsetting;
35680baa
JFM		 2219
2220 /* check if any audio device */
2221 if (dev->config->desc.bNumInterfaces != 1) {
2222 int i;
2223 struct usb_interface *intf2;
2224
2225 for (i = 0; i < dev->config->desc.bNumInterfaces; i++) {
2226 intf2 = dev->config->interface[i];
2227 if (intf2 != NULL
2228 && intf2->altsetting != NULL
2229 && intf2->altsetting->desc.bInterfaceClass ==
2230 USB_CLASS_AUDIO) {
2231 gspca_dev->audio = 1;
2232 break;
2233 }
2234 }
2235 }
2236
63eb9546 2237 gspca_dev->sd_desc = sd_desc;
63eb9546 2238 gspca_dev->nbufread = 2;
ff374747 2239 gspca_dev->empty_packet = -1; /* don't check the empty packets */
63eb9546 2240
012d6b02 2241 /* configure the subdriver and initialize the USB device */
ba38ee8e 2242 ret = sd_desc->config(gspca_dev, id);
012d6b02
JFM		 2243 if (ret < 0)
2244 goto out;
6a33091f
JFM		 2245 if (gspca_dev->cam.ctrls != NULL)
2246 ctrls_init(gspca_dev);
ba38ee8e 2247 ret = sd_desc->init(gspca_dev);
63eb9546
JFM		 2248 if (ret < 0)
2249 goto out;
2250 gspca_set_default_mode(gspca_dev);
2251
10ee2402
HG		 2252 ret = gspca_input_connect(gspca_dev);
2253 if (ret)
2254 goto out;
2255
63eb9546 2256 mutex_init(&gspca_dev->usb_lock);
63eb9546
JFM		 2257 mutex_init(&gspca_dev->queue_lock);
2258 init_waitqueue_head(&gspca_dev->wq);
2259
2260 /* init video stuff */
ba38ee8e 2261 memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
24441631 2262 gspca_dev->vdev.parent = &intf->dev;
5c4fa002 2263 gspca_dev->module = module;
ee56a4d3 2264 gspca_dev->present = 1;
a12ca6a6 2265 ret = video_register_device(&gspca_dev->vdev,
63eb9546 2266 VFL_TYPE_GRABBER,
8d584a53 2267 -1);
63eb9546 2268 if (ret < 0) {
133a9fe9 2269 pr_err("video_register_device err %d\n", ret);
63eb9546
JFM		 2270 goto out;
2271 }
2272
63eb9546 2273 usb_set_intfdata(intf, gspca_dev);
38c7c036 2274 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
0274d42e 2275
10ee2402 2276 gspca_input_create_urb(gspca_dev);
0274d42e 2277
63eb9546
JFM		 2278 return 0;
2279out:
f7628015 2280#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
10ee2402
HG		 2281 if (gspca_dev->input_dev)
2282 input_unregister_device(gspca_dev->input_dev);
e7637521 2283#endif
e07a1d8a
JFM		 2284 kfree(gspca_dev->usb_buf);
2285 kfree(gspca_dev);
63eb9546
JFM		 2286 return ret;
2287}
4462864d
JFM		 2288EXPORT_SYMBOL(gspca_dev_probe2);
2289
2290/* same function as the previous one, but check the interface */
2291int gspca_dev_probe(struct usb_interface *intf,
2292 const struct usb_device_id *id,
2293 const struct sd_desc *sd_desc,
2294 int dev_size,
2295 struct module *module)
2296{
2297 struct usb_device *dev = interface_to_usbdev(intf);
2298
2299 /* we don't handle multi-config cameras */
2300 if (dev->descriptor.bNumConfigurations != 1) {
133a9fe9
JP		 2301 pr_err("%04x:%04x too many config\n",
2302 id->idVendor, id->idProduct);
4462864d
JFM		 2303 return -ENODEV;
2304 }
2305
2306 /* the USB video interface must be the first one */
2307 if (dev->config->desc.bNumInterfaces != 1
c4dc692c 2308 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
4462864d 2309 return -ENODEV;
4462864d
JFM		 2310
2311 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
2312}
63eb9546
JFM		 2313EXPORT_SYMBOL(gspca_dev_probe);
2314
2315/*
2316 * USB disconnection
2317 *
2318 * This function must be called by the sub-driver
2319 * when the device disconnects, after the specific resources are freed.
2320 */
2321void gspca_disconnect(struct usb_interface *intf)
2322{
4aa0d037 2323 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
f7628015 2324#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e 2325 struct input_dev *input_dev;
e070bf9e 2326#endif
63eb9546 2327
38c7c036
LP		 2328 PDEBUG(D_PROBE, "%s disconnect",
2329 video_device_node_name(&gspca_dev->vdev));
ad28127d 2330 mutex_lock(&gspca_dev->usb_lock);
4e770f76 2331
6e4ae872 2332 gspca_dev->present = 0;
4e770f76 2333 wake_up_interruptible(&gspca_dev->wq);
6e4ae872 2334
4e770f76 2335 destroy_urbs(gspca_dev);
090264e5 2336
f7628015 2337#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 2338 gspca_input_destroy_urb(gspca_dev);
2339 input_dev = gspca_dev->input_dev;
2340 if (input_dev) {
2341 gspca_dev->input_dev = NULL;
2342 input_unregister_device(input_dev);
2343 }
e070bf9e 2344#endif
0274d42e 2345
090264e5 2346 /* the device is freed at exit of this function */
ad28127d 2347 gspca_dev->dev = NULL;
090264e5
JFM		 2348 mutex_unlock(&gspca_dev->usb_lock);
2349
6b060ffe
FZ		 2350 usb_set_intfdata(intf, NULL);
2351
a12ca6a6 2352 /* release the device */
25985edc 2353 /* (this will call gspca_release() immediately or on last close) */
a12ca6a6 2354 video_unregister_device(&gspca_dev->vdev);
3145b8c1 2355
0d07e240 2356/* PDEBUG(D_PROBE, "disconnect complete"); */
63eb9546
JFM		 2357}
2358EXPORT_SYMBOL(gspca_disconnect);
2359
6a709749
JFM		 2360#ifdef CONFIG_PM
2361int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2362{
2363 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2364
2365 if (!gspca_dev->streaming)
2366 return 0;
2367 gspca_dev->frozen = 1; /* avoid urb error messages */
012d6b02
JFM		 2368 if (gspca_dev->sd_desc->stopN)
2369 gspca_dev->sd_desc->stopN(gspca_dev);
6a709749 2370 destroy_urbs(gspca_dev);
0274d42e 2371 gspca_input_destroy_urb(gspca_dev);
6a709749 2372 gspca_set_alt0(gspca_dev);
012d6b02
JFM		 2373 if (gspca_dev->sd_desc->stop0)
2374 gspca_dev->sd_desc->stop0(gspca_dev);
6a709749
JFM		 2375 return 0;
2376}
2377EXPORT_SYMBOL(gspca_suspend);
2378
2379int gspca_resume(struct usb_interface *intf)
2380{
2381 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2382
2383 gspca_dev->frozen = 0;
012d6b02 2384 gspca_dev->sd_desc->init(gspca_dev);
0274d42e 2385 gspca_input_create_urb(gspca_dev);
012d6b02
JFM		 2386 if (gspca_dev->streaming)
2387 return gspca_init_transfer(gspca_dev);
1e89e2da 2388 return 0;
6a709749
JFM		 2389}
2390EXPORT_SYMBOL(gspca_resume);
2391#endif
dcef3237
HG		 2392/* -- cam driver utility functions -- */
2393
2394/* auto gain and exposure algorithm based on the knee algorithm described here:
2395 http://ytse.tricolour.net/docs/LowLightOptimization.html
2396
2397 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2398 where changed. */
2399int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2400 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2401{
2402 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2403 const struct ctrl *gain_ctrl = NULL;
2404 const struct ctrl *exposure_ctrl = NULL;
2405 const struct ctrl *autogain_ctrl = NULL;
2406 int retval = 0;
2407
2408 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
26984b09
HG		 2409 if (gspca_dev->ctrl_dis & (1 << i))
2410 continue;
dcef3237
HG		 2411 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2412 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2413 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2414 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2415 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2416 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2417 }
2418 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2419 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2420 "on cam without (auto)gain/exposure");
2421 return 0;
2422 }
2423
2424 if (gain_ctrl->get(gspca_dev, &gain) ||
2425 exposure_ctrl->get(gspca_dev, &exposure) ||
2426 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2427 return 0;
2428
2429 orig_gain = gain;
2430 orig_exposure = exposure;
2431
2432 /* If we are of a multiple of deadzone, do multiple steps to reach the
2433 desired lumination fast (with the risc of a slight overshoot) */
2434 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2435
1c44d81d 2436 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
dcef3237
HG		 2437 avg_lum, desired_avg_lum, steps);
2438
2439 for (i = 0; i < steps; i++) {
2440 if (avg_lum > desired_avg_lum) {
2441 if (gain > gain_knee)
2442 gain--;
2443 else if (exposure > exposure_knee)
2444 exposure--;
2445 else if (gain > gain_ctrl->qctrl.default_value)
2446 gain--;
2447 else if (exposure > exposure_ctrl->qctrl.minimum)
2448 exposure--;
2449 else if (gain > gain_ctrl->qctrl.minimum)
2450 gain--;
2451 else
2452 break;
2453 } else {
2454 if (gain < gain_ctrl->qctrl.default_value)
2455 gain++;
2456 else if (exposure < exposure_knee)
2457 exposure++;
2458 else if (gain < gain_knee)
2459 gain++;
2460 else if (exposure < exposure_ctrl->qctrl.maximum)
2461 exposure++;
2462 else if (gain < gain_ctrl->qctrl.maximum)
2463 gain++;
2464 else
2465 break;
2466 }
2467 }
2468
2469 if (gain != orig_gain) {
2470 gain_ctrl->set(gspca_dev, gain);
2471 retval = 1;
2472 }
2473 if (exposure != orig_exposure) {
2474 exposure_ctrl->set(gspca_dev, exposure);
2475 retval = 1;
2476 }
2477
2478 return retval;
2479}
2480EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2481
63eb9546
JFM		 2482/* -- module insert / remove -- */
2483static int __init gspca_init(void)
2484{
133a9fe9 2485 pr_info("v" DRIVER_VERSION_NUMBER " registered\n");
63eb9546
JFM		 2486 return 0;
2487}
2488static void __exit gspca_exit(void)
2489{
63eb9546
JFM		 2490}
2491
2492module_init(gspca_init);
2493module_exit(gspca_exit);
2494
335b3f88 2495#ifdef GSPCA_DEBUG
63eb9546
JFM		 2496module_param_named(debug, gspca_debug, int, 0644);
2497MODULE_PARM_DESC(debug,
2498 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
f8e5677f 2499 " 0x08:stream 0x10:frame 0x20:packet"
d43fa32f 2500 " 0x0100: v4l2");
6a7eba24 2501#endif
Linux kernel - Deliverables
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