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V4L/DVB: gspca - main: Restart streaming after reqbuf
[linux-2.6-block.git] / drivers / media / video / gspca / gspca.c
CommitLineData
63eb9546
JFM		 1/*
2 * Main USB camera driver
3 *
27c6f9e5 4 * Copyright (C) 2008-2010 Jean-François Moine <http://moinejf.free.fr>
63eb9546 5 *
0274d42e
MN		 6 * Camera button input handling by Márton Németh
7 * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
8 *
63eb9546
JFM		 9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 * for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#define MODULE_NAME "gspca"
25
26#include <linux/init.h>
cf0fe08d 27#include <linux/version.h>
63eb9546
JFM		 28#include <linux/fs.h>
29#include <linux/vmalloc.h>
30#include <linux/sched.h>
31#include <linux/slab.h>
32#include <linux/mm.h>
33#include <linux/string.h>
34#include <linux/pagemap.h>
956e42d2 35#include <linux/io.h>
63eb9546 36#include <asm/page.h>
956e42d2 37#include <linux/uaccess.h>
2f51d00f 38#include <linux/ktime.h>
35ea11ff 39#include <media/v4l2-ioctl.h>
63eb9546
JFM		 40
41#include "gspca.h"
42
f7628015 43#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 44#include <linux/input.h>
45#include <linux/usb/input.h>
e070bf9e 46#endif
0274d42e 47
d43fa32f 48/* global values */
8fee8453
JFM		 49#define DEF_NURBS 3 /* default number of URBs */
50#if DEF_NURBS > MAX_NURBS
51#error "DEF_NURBS too big"
52#endif
d43fa32f 53
27c6f9e5 54MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
63eb9546
JFM		 55MODULE_DESCRIPTION("GSPCA USB Camera Driver");
56MODULE_LICENSE("GPL");
57
55461f4c 58#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 9, 0)
63eb9546 59
335b3f88 60#ifdef GSPCA_DEBUG
63eb9546
JFM		 61int gspca_debug = D_ERR | D_PROBE;
62EXPORT_SYMBOL(gspca_debug);
63
64static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h)
65{
66 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
67 PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d",
68 txt,
69 pixfmt & 0xff,
70 (pixfmt >> 8) & 0xff,
71 (pixfmt >> 16) & 0xff,
72 pixfmt >> 24,
73 w, h);
74 } else {
75 PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d",
76 txt,
77 pixfmt,
78 w, h);
79 }
80}
81#else
82#define PDEBUG_MODE(txt, pixfmt, w, h)
83#endif
84
77ee3318 85/* specific memory types - !! should be different from V4L2_MEMORY_xxx */
d43fa32f
JFM		 86#define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
87#define GSPCA_MEMORY_READ 7
88
d43fa32f 89#define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
d43fa32f 90
63eb9546
JFM		 91/*
92 * VMA operations.
93 */
94static void gspca_vm_open(struct vm_area_struct *vma)
95{
96 struct gspca_frame *frame = vma->vm_private_data;
97
98 frame->vma_use_count++;
99 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
100}
101
102static void gspca_vm_close(struct vm_area_struct *vma)
103{
104 struct gspca_frame *frame = vma->vm_private_data;
105
106 if (--frame->vma_use_count <= 0)
107 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
108}
109
f0f37e2f 110static const struct vm_operations_struct gspca_vm_ops = {
63eb9546
JFM		 111 .open = gspca_vm_open,
112 .close = gspca_vm_close,
113};
114
0274d42e
MN		 115/*
116 * Input and interrupt endpoint handling functions
117 */
f7628015 118#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 119static void int_irq(struct urb *urb)
120{
121 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
122 int ret;
123
124 ret = urb->status;
125 switch (ret) {
126 case 0:
127 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
128 urb->transfer_buffer, urb->actual_length) < 0) {
129 PDEBUG(D_ERR, "Unknown packet received");
130 }
131 break;
132
133 case -ENOENT:
134 case -ECONNRESET:
135 case -ENODEV:
136 case -ESHUTDOWN:
137 /* Stop is requested either by software or hardware is gone,
138 * keep the ret value non-zero and don't resubmit later.
139 */
140 break;
141
142 default:
143 PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status);
144 urb->status = 0;
145 ret = 0;
146 }
147
148 if (ret == 0) {
149 ret = usb_submit_urb(urb, GFP_ATOMIC);
150 if (ret < 0)
151 PDEBUG(D_ERR, "Resubmit URB failed with error %i", ret);
152 }
153}
154
155static int gspca_input_connect(struct gspca_dev *dev)
156{
157 struct input_dev *input_dev;
158 int err = 0;
159
160 dev->input_dev = NULL;
ac82f59f 161 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
0274d42e
MN		 162 input_dev = input_allocate_device();
163 if (!input_dev)
164 return -ENOMEM;
165
166 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
167 strlcat(dev->phys, "/input0", sizeof(dev->phys));
168
169 input_dev->name = dev->sd_desc->name;
170 input_dev->phys = dev->phys;
171
172 usb_to_input_id(dev->dev, &input_dev->id);
173
174 input_dev->evbit[0] = BIT_MASK(EV_KEY);
175 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
176 input_dev->dev.parent = &dev->dev->dev;
177
178 err = input_register_device(input_dev);
179 if (err) {
180 PDEBUG(D_ERR, "Input device registration failed "
181 "with error %i", err);
182 input_dev->dev.parent = NULL;
183 input_free_device(input_dev);
184 } else {
185 dev->input_dev = input_dev;
186 }
10ee2402 187 }
0274d42e
MN		 188
189 return err;
190}
191
192static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
193 struct usb_endpoint_descriptor *ep)
194{
195 unsigned int buffer_len;
196 int interval;
197 struct urb *urb;
198 struct usb_device *dev;
199 void *buffer = NULL;
200 int ret = -EINVAL;
201
202 buffer_len = ep->wMaxPacketSize;
203 interval = ep->bInterval;
204 PDEBUG(D_PROBE, "found int in endpoint: 0x%x, "
205 "buffer_len=%u, interval=%u",
206 ep->bEndpointAddress, buffer_len, interval);
207
208 dev = gspca_dev->dev;
209
210 urb = usb_alloc_urb(0, GFP_KERNEL);
211 if (!urb) {
212 ret = -ENOMEM;
213 goto error;
214 }
215
216 buffer = usb_buffer_alloc(dev, ep->wMaxPacketSize,
217 GFP_KERNEL, &urb->transfer_dma);
218 if (!buffer) {
219 ret = -ENOMEM;
220 goto error_buffer;
221 }
222 usb_fill_int_urb(urb, dev,
223 usb_rcvintpipe(dev, ep->bEndpointAddress),
224 buffer, buffer_len,
225 int_irq, (void *)gspca_dev, interval);
226 gspca_dev->int_urb = urb;
227 ret = usb_submit_urb(urb, GFP_KERNEL);
228 if (ret < 0) {
229 PDEBUG(D_ERR, "submit URB failed with error %i", ret);
230 goto error_submit;
231 }
232 return ret;
233
234error_submit:
235 usb_buffer_free(dev,
236 urb->transfer_buffer_length,
237 urb->transfer_buffer,
238 urb->transfer_dma);
239error_buffer:
240 usb_free_urb(urb);
241error:
242 return ret;
243}
244
10ee2402 245static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
0274d42e 246{
0274d42e
MN		 247 struct usb_interface *intf;
248 struct usb_host_interface *intf_desc;
249 struct usb_endpoint_descriptor *ep;
250 int i;
251
252 if (gspca_dev->sd_desc->int_pkt_scan) {
253 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
254 intf_desc = intf->cur_altsetting;
255 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
256 ep = &intf_desc->endpoint[i].desc;
257 if (usb_endpoint_dir_in(ep) &&
258 usb_endpoint_xfer_int(ep)) {
259
10ee2402 260 alloc_and_submit_int_urb(gspca_dev, ep);
0274d42e
MN		 261 break;
262 }
263 }
264 }
0274d42e
MN		 265}
266
267static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
268{
269 struct urb *urb;
270
271 urb = gspca_dev->int_urb;
272 if (urb) {
273 gspca_dev->int_urb = NULL;
274 usb_kill_urb(urb);
275 usb_buffer_free(gspca_dev->dev,
276 urb->transfer_buffer_length,
277 urb->transfer_buffer,
278 urb->transfer_dma);
279 usb_free_urb(urb);
280 }
281}
f7628015
RD		 282#else
283static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
284{
285}
286
287static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
288{
289}
290
291static inline int gspca_input_connect(struct gspca_dev *dev)
292{
293 return 0;
294}
0274d42e
MN		 295#endif
296
1b60e1ad
JFM		 297/* get the current input frame buffer */
298struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev)
299{
300 struct gspca_frame *frame;
1b60e1ad 301
db870875 302 frame = gspca_dev->cur_frame;
1b60e1ad
JFM		 303 if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
304 != V4L2_BUF_FLAG_QUEUED)
305 return NULL;
306 return frame;
307}
308EXPORT_SYMBOL(gspca_get_i_frame);
309
63eb9546 310/*
d43fa32f 311 * fill a video frame from an URB and resubmit
63eb9546 312 */
d43fa32f
JFM		 313static void fill_frame(struct gspca_dev *gspca_dev,
314 struct urb *urb)
63eb9546 315{
8d584a53 316 u8 *data; /* address of data in the iso message */
1b60e1ad 317 int i, len, st;
63eb9546
JFM		 318 cam_pkt_op pkt_scan;
319
6a7eba24 320 if (urb->status != 0) {
090264e5
JFM		 321 if (urb->status == -ESHUTDOWN)
322 return; /* disconnection */
62ee8eee 323#ifdef CONFIG_PM
6a540bdf
HG		 324 if (gspca_dev->frozen)
325 return;
62ee8eee 326#endif
6a540bdf 327 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
8157852f 328 urb->status = 0;
bf926adf 329 goto resubmit;
6a7eba24 330 }
63eb9546
JFM		 331 pkt_scan = gspca_dev->sd_desc->pkt_scan;
332 for (i = 0; i < urb->number_of_packets; i++) {
333
63eb9546
JFM		 334 /* check the packet status and length */
335 len = urb->iso_frame_desc[i].actual_length;
ff374747
JFM		 336 if (len == 0) {
337 if (gspca_dev->empty_packet == 0)
338 gspca_dev->empty_packet = 1;
6a7eba24 339 continue;
ff374747 340 }
63eb9546
JFM		 341 st = urb->iso_frame_desc[i].status;
342 if (st) {
6a7eba24
JFM		 343 PDEBUG(D_ERR,
344 "ISOC data error: [%d] len=%d, status=%d",
63eb9546
JFM		 345 i, len, st);
346 gspca_dev->last_packet_type = DISCARD_PACKET;
347 continue;
348 }
63eb9546
JFM		 349
350 /* let the packet be analyzed by the subdriver */
351 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
352 i, urb->iso_frame_desc[i].offset, len);
8d584a53 353 data = (u8 *) urb->transfer_buffer
63eb9546 354 + urb->iso_frame_desc[i].offset;
76dd272b 355 pkt_scan(gspca_dev, data, len);
63eb9546
JFM		 356 }
357
bf926adf 358resubmit:
63eb9546 359 /* resubmit the URB */
63eb9546
JFM		 360 st = usb_submit_urb(urb, GFP_ATOMIC);
361 if (st < 0)
362 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
363}
364
d43fa32f
JFM		 365/*
366 * ISOC message interrupt from the USB device
367 *
ac0d6df6 368 * Analyse each packet and call the subdriver for copy to the frame buffer.
d43fa32f 369 */
8d584a53 370static void isoc_irq(struct urb *urb)
d43fa32f
JFM		 371{
372 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
373
3647fea8 374 PDEBUG(D_PACK, "isoc irq");
d43fa32f
JFM		 375 if (!gspca_dev->streaming)
376 return;
377 fill_frame(gspca_dev, urb);
378}
379
0be01004
JFM		 380/*
381 * bulk message interrupt from the USB device
382 */
8d584a53 383static void bulk_irq(struct urb *urb)
0be01004
JFM		 384{
385 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
dff369aa 386 int st;
0be01004
JFM		 387
388 PDEBUG(D_PACK, "bulk irq");
389 if (!gspca_dev->streaming)
390 return;
880ae24d
JFM		 391 switch (urb->status) {
392 case 0:
393 break;
090264e5
JFM		 394 case -ESHUTDOWN:
395 return; /* disconnection */
880ae24d 396 default:
0be01004 397#ifdef CONFIG_PM
6a540bdf
HG		 398 if (gspca_dev->frozen)
399 return;
0be01004 400#endif
6a540bdf 401 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
8157852f 402 urb->status = 0;
bf926adf 403 goto resubmit;
0be01004
JFM		 404 }
405
d131c3c9
JFM		 406 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
407 gspca_dev->sd_desc->pkt_scan(gspca_dev,
d131c3c9
JFM		 408 urb->transfer_buffer,
409 urb->actual_length);
dff369aa 410
bf926adf 411resubmit:
dff369aa
AO		 412 /* resubmit the URB */
413 if (gspca_dev->cam.bulk_nurbs != 0) {
414 st = usb_submit_urb(urb, GFP_ATOMIC);
415 if (st < 0)
416 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
417 }
0be01004
JFM		 418}
419
63eb9546
JFM		 420/*
421 * add data to the current frame
422 *
ac0d6df6
JFM		 423 * This function is called by the subdrivers at interrupt level.
424 *
63eb9546
JFM		 425 * To build a frame, these ones must add
426 * - one FIRST_PACKET
427 * - 0 or many INTER_PACKETs
428 * - one LAST_PACKET
429 * DISCARD_PACKET invalidates the whole frame.
430 * On LAST_PACKET, a new frame is returned.
431 */
76dd272b
JFM		 432void gspca_frame_add(struct gspca_dev *gspca_dev,
433 enum gspca_packet_type packet_type,
434 const u8 *data,
435 int len)
63eb9546 436{
3ec342f2 437 struct gspca_frame *frame;
63eb9546
JFM		 438 int i, j;
439
e2997a72 440 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
d131c3c9
JFM		 441
442 /* check the availability of the frame buffer */
3ec342f2 443 frame = gspca_dev->cur_frame;
d131c3c9
JFM		 444 if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
445 != V4L2_BUF_FLAG_QUEUED) {
446 gspca_dev->last_packet_type = DISCARD_PACKET;
76dd272b 447 return;
d131c3c9 448 }
63eb9546
JFM		 449
450 /* when start of a new frame, if the current frame buffer
451 * is not queued, discard the whole frame */
452 if (packet_type == FIRST_PACKET) {
63eb9546 453 frame->data_end = frame->data;
2f51d00f 454 frame->v4l2_buf.timestamp = ktime_to_timeval(ktime_get());
63eb9546 455 frame->v4l2_buf.sequence = ++gspca_dev->sequence;
d43fa32f 456 } else if (gspca_dev->last_packet_type == DISCARD_PACKET) {
06ca78fa
JFM		 457 if (packet_type == LAST_PACKET)
458 gspca_dev->last_packet_type = packet_type;
76dd272b 459 return;
d43fa32f 460 }
63eb9546 461
d43fa32f 462 /* append the packet to the frame buffer */
63eb9546
JFM		 463 if (len > 0) {
464 if (frame->data_end - frame->data + len
465 > frame->v4l2_buf.length) {
a9e11134 466 PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d",
63eb9546
JFM		 467 frame->data_end - frame->data + len,
468 frame->v4l2_buf.length);
469 packet_type = DISCARD_PACKET;
470 } else {
ac0d6df6 471 memcpy(frame->data_end, data, len);
63eb9546
JFM		 472 frame->data_end += len;
473 }
474 }
475 gspca_dev->last_packet_type = packet_type;
476
219423c1 477 /* if last packet, wake up the application and advance in the queue */
63eb9546
JFM		 478 if (packet_type == LAST_PACKET) {
479 frame->v4l2_buf.bytesused = frame->data_end - frame->data;
480 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED;
481 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE;
63eb9546 482 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
d43fa32f
JFM		 483 i = (gspca_dev->fr_i + 1) % gspca_dev->nframes;
484 gspca_dev->fr_i = i;
63eb9546
JFM		 485 PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d",
486 frame->v4l2_buf.bytesused,
487 gspca_dev->fr_q,
488 i,
489 gspca_dev->fr_o);
490 j = gspca_dev->fr_queue[i];
76dd272b 491 gspca_dev->cur_frame = &gspca_dev->frame[j];
63eb9546 492 }
63eb9546
JFM		 493}
494EXPORT_SYMBOL(gspca_frame_add);
495
496static int gspca_is_compressed(__u32 format)
497{
498 switch (format) {
499 case V4L2_PIX_FMT_MJPEG:
500 case V4L2_PIX_FMT_JPEG:
50a871fe 501 case V4L2_PIX_FMT_SPCA561:
ab8f12cf 502 case V4L2_PIX_FMT_PAC207:
d661e622 503 case V4L2_PIX_FMT_MR97310A:
63eb9546
JFM		 504 return 1;
505 }
506 return 0;
507}
508
d50e257e 509static void *rvmalloc(long size)
63eb9546
JFM		 510{
511 void *mem;
512 unsigned long adr;
513
63eb9546 514 mem = vmalloc_32(size);
efab8211 515 if (mem != NULL) {
63eb9546 516 adr = (unsigned long) mem;
d50e257e 517 while (size > 0) {
63eb9546
JFM		 518 SetPageReserved(vmalloc_to_page((void *) adr));
519 adr += PAGE_SIZE;
520 size -= PAGE_SIZE;
521 }
522 }
523 return mem;
524}
525
ac0d6df6 526static void rvfree(void *mem, long size)
63eb9546
JFM		 527{
528 unsigned long adr;
529
63eb9546 530 adr = (unsigned long) mem;
ac0d6df6 531 while (size > 0) {
63eb9546
JFM		 532 ClearPageReserved(vmalloc_to_page((void *) adr));
533 adr += PAGE_SIZE;
534 size -= PAGE_SIZE;
535 }
536 vfree(mem);
537}
538
539static int frame_alloc(struct gspca_dev *gspca_dev,
d43fa32f 540 unsigned int count)
63eb9546 541{
d43fa32f
JFM		 542 struct gspca_frame *frame;
543 unsigned int frsz;
544 int i;
63eb9546 545
c2446b3e
JFM		 546 i = gspca_dev->curr_mode;
547 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
63eb9546 548 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
63eb9546 549 frsz = PAGE_ALIGN(frsz);
63eb9546 550 gspca_dev->frsz = frsz;
c2446b3e
JFM		 551 if (count > GSPCA_MAX_FRAMES)
552 count = GSPCA_MAX_FRAMES;
ac0d6df6
JFM		 553 gspca_dev->frbuf = rvmalloc(frsz * count);
554 if (!gspca_dev->frbuf) {
555 err("frame alloc failed");
556 return -ENOMEM;
63eb9546
JFM		 557 }
558 gspca_dev->nframes = count;
559 for (i = 0; i < count; i++) {
d43fa32f
JFM		 560 frame = &gspca_dev->frame[i];
561 frame->v4l2_buf.index = i;
562 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
563 frame->v4l2_buf.flags = 0;
564 frame->v4l2_buf.field = V4L2_FIELD_NONE;
565 frame->v4l2_buf.length = frsz;
566 frame->v4l2_buf.memory = gspca_dev->memory;
567 frame->v4l2_buf.sequence = 0;
ac0d6df6 568 frame->data = frame->data_end =
d43fa32f 569 gspca_dev->frbuf + i * frsz;
ac0d6df6 570 frame->v4l2_buf.m.offset = i * frsz;
63eb9546
JFM		 571 }
572 gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
3ec342f2 573 gspca_dev->cur_frame = &gspca_dev->frame[0];
63eb9546
JFM		 574 gspca_dev->last_packet_type = DISCARD_PACKET;
575 gspca_dev->sequence = 0;
d43fa32f 576 return 0;
63eb9546
JFM		 577}
578
579static void frame_free(struct gspca_dev *gspca_dev)
580{
581 int i;
582
583 PDEBUG(D_STREAM, "frame free");
efab8211 584 if (gspca_dev->frbuf != NULL) {
63eb9546
JFM		 585 rvfree(gspca_dev->frbuf,
586 gspca_dev->nframes * gspca_dev->frsz);
587 gspca_dev->frbuf = NULL;
588 for (i = 0; i < gspca_dev->nframes; i++)
589 gspca_dev->frame[i].data = NULL;
590 }
591 gspca_dev->nframes = 0;
592}
593
d43fa32f 594static void destroy_urbs(struct gspca_dev *gspca_dev)
63eb9546
JFM		 595{
596 struct urb *urb;
597 unsigned int i;
598
599 PDEBUG(D_STREAM, "kill transfer");
44732819 600 for (i = 0; i < MAX_NURBS; i++) {
4aa0d037 601 urb = gspca_dev->urb[i];
63eb9546 602 if (urb == NULL)
d43fa32f 603 break;
63eb9546 604
4aa0d037 605 gspca_dev->urb[i] = NULL;
090264e5 606 usb_kill_urb(urb);
efab8211 607 if (urb->transfer_buffer != NULL)
63eb9546
JFM		 608 usb_buffer_free(gspca_dev->dev,
609 urb->transfer_buffer_length,
4aa0d037 610 urb->transfer_buffer,
63eb9546 611 urb->transfer_dma);
63eb9546
JFM		 612 usb_free_urb(urb);
613 }
63eb9546
JFM		 614}
615
616/*
219423c1 617 * look for an input transfer endpoint in an alternate setting
63eb9546 618 */
0be01004 619static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
6929dc6b 620 int xfer)
63eb9546
JFM		 621{
622 struct usb_host_endpoint *ep;
623 int i, attr;
624
63eb9546
JFM		 625 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
626 ep = &alt->endpoint[i];
50e06dee 627 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
30d35e49
JFM		 628 if (attr == xfer
629 && ep->desc.wMaxPacketSize != 0)
50e06dee 630 return ep;
63eb9546
JFM		 631 }
632 return NULL;
633}
634
635/*
219423c1 636 * look for an input (isoc or bulk) endpoint
63eb9546
JFM		 637 *
638 * The endpoint is defined by the subdriver.
639 * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
640 * This routine may be called many times when the bandwidth is too small
641 * (the bandwidth is checked on urb submit).
642 */
0be01004 643static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
63eb9546
JFM		 644{
645 struct usb_interface *intf;
646 struct usb_host_endpoint *ep;
6929dc6b 647 int xfer, i, ret;
63eb9546
JFM		 648
649 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
6a7eba24 650 ep = NULL;
6929dc6b
JFM		 651 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
652 : USB_ENDPOINT_XFER_ISOC;
63eb9546 653 i = gspca_dev->alt; /* previous alt setting */
a511ba94
HG		 654 if (gspca_dev->cam.reverse_alts) {
655 while (++i < gspca_dev->nbalt) {
656 ep = alt_xfer(&intf->altsetting[i], xfer);
657 if (ep)
658 break;
659 }
660 } else {
661 while (--i >= 0) {
662 ep = alt_xfer(&intf->altsetting[i], xfer);
663 if (ep)
664 break;
665 }
63eb9546 666 }
6a7eba24 667 if (ep == NULL) {
6929dc6b
JFM		 668 err("no transfer endpoint found");
669 return NULL;
63eb9546 670 }
0be01004 671 PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
63eb9546 672 i, ep->desc.bEndpointAddress);
1c8336d3 673 gspca_dev->alt = i; /* memorize the current alt setting */
8dd07ef1 674 if (gspca_dev->nbalt > 1) {
0274d42e 675 gspca_input_destroy_urb(gspca_dev);
95d9142c
JFM		 676 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
677 if (ret < 0) {
6929dc6b 678 err("set alt %d err %d", i, ret);
0274d42e 679 ep = NULL;
95d9142c 680 }
0274d42e 681 gspca_input_create_urb(gspca_dev);
63eb9546 682 }
63eb9546
JFM		 683 return ep;
684}
685
686/*
0be01004 687 * create the URBs for image transfer
63eb9546
JFM		 688 */
689static int create_urbs(struct gspca_dev *gspca_dev,
690 struct usb_host_endpoint *ep)
691{
692 struct urb *urb;
d43fa32f 693 int n, nurbs, i, psize, npkt, bsize;
63eb9546
JFM		 694
695 /* calculate the packet size and the number of packets */
63eb9546 696 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
d43fa32f 697
6929dc6b 698 if (!gspca_dev->cam.bulk) { /* isoc */
95d9142c
JFM		 699
700 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
1f53b0b0
JFM		 701 if (gspca_dev->pkt_size == 0)
702 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
703 else
704 psize = gspca_dev->pkt_size;
49cb6b04
JFM		 705 npkt = gspca_dev->cam.npkt;
706 if (npkt == 0)
707 npkt = 32; /* default value */
0be01004
JFM		 708 bsize = psize * npkt;
709 PDEBUG(D_STREAM,
710 "isoc %d pkts size %d = bsize:%d",
711 npkt, psize, bsize);
51977a8d 712 nurbs = DEF_NURBS;
95d9142c 713 } else { /* bulk */
0be01004 714 npkt = 0;
dff369aa 715 bsize = gspca_dev->cam.bulk_size;
95d9142c
JFM		 716 if (bsize == 0)
717 bsize = psize;
0be01004 718 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
dff369aa
AO		 719 if (gspca_dev->cam.bulk_nurbs != 0)
720 nurbs = gspca_dev->cam.bulk_nurbs;
721 else
722 nurbs = 1;
0be01004
JFM		 723 }
724
d43fa32f 725 for (n = 0; n < nurbs; n++) {
63eb9546
JFM		 726 urb = usb_alloc_urb(npkt, GFP_KERNEL);
727 if (!urb) {
728 err("usb_alloc_urb failed");
729 return -ENOMEM;
730 }
db870875 731 gspca_dev->urb[n] = urb;
4aa0d037 732 urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev,
63eb9546
JFM		 733 bsize,
734 GFP_KERNEL,
735 &urb->transfer_dma);
736
4aa0d037 737 if (urb->transfer_buffer == NULL) {
db870875 738 err("usb_buffer_alloc failed");
63eb9546
JFM		 739 return -ENOMEM;
740 }
63eb9546
JFM		 741 urb->dev = gspca_dev->dev;
742 urb->context = gspca_dev;
63eb9546 743 urb->transfer_buffer_length = bsize;
0be01004
JFM		 744 if (npkt != 0) { /* ISOC */
745 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
746 ep->desc.bEndpointAddress);
6c49da7f
FZ		 747 urb->transfer_flags = URB_ISO_ASAP
748 | URB_NO_TRANSFER_DMA_MAP;
0be01004
JFM		 749 urb->interval = ep->desc.bInterval;
750 urb->complete = isoc_irq;
751 urb->number_of_packets = npkt;
752 for (i = 0; i < npkt; i++) {
753 urb->iso_frame_desc[i].length = psize;
754 urb->iso_frame_desc[i].offset = psize * i;
755 }
756 } else { /* bulk */
757 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
758 ep->desc.bEndpointAddress),
6c49da7f 759 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
0be01004 760 urb->complete = bulk_irq;
63eb9546
JFM		 761 }
762 }
763 return 0;
764}
765
766/*
767 * start the USB transfer
768 */
769static int gspca_init_transfer(struct gspca_dev *gspca_dev)
770{
63eb9546 771 struct usb_host_endpoint *ep;
db870875 772 struct urb *urb;
63eb9546
JFM		 773 int n, ret;
774
e2997a72
HG		 775 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
776 return -ERESTARTSYS;
63eb9546 777
090264e5
JFM		 778 if (!gspca_dev->present) {
779 ret = -ENODEV;
780 goto out;
781 }
782
ab6c8cf2
JFM		 783 gspca_dev->usb_err = 0;
784
d43fa32f
JFM		 785 /* set the higher alternate setting and
786 * loop until urb submit succeeds */
a511ba94
HG		 787 if (gspca_dev->cam.reverse_alts)
788 gspca_dev->alt = 0;
789 else
790 gspca_dev->alt = gspca_dev->nbalt;
791
1f53b0b0
JFM		 792 if (gspca_dev->sd_desc->isoc_init) {
793 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
794 if (ret < 0)
795 goto out;
796 }
797 ep = get_ep(gspca_dev);
798 if (ep == NULL) {
799 ret = -EIO;
800 goto out;
801 }
63eb9546 802 for (;;) {
47aaca96
JFM		 803 if (!gspca_dev->cam.no_urb_create) {
804 PDEBUG(D_STREAM, "init transfer alt %d",
805 gspca_dev->alt);
806 ret = create_urbs(gspca_dev, ep);
807 if (ret < 0) {
808 destroy_urbs(gspca_dev);
809 goto out;
810 }
db870875 811 }
63eb9546 812
8fe2f1d5 813 /* clear the bulk endpoint */
6929dc6b 814 if (gspca_dev->cam.bulk)
8fe2f1d5 815 usb_clear_halt(gspca_dev->dev,
50e06dee 816 gspca_dev->urb[0]->pipe);
8fe2f1d5 817
63eb9546 818 /* start the cam */
72ab97ce
JFM		 819 ret = gspca_dev->sd_desc->start(gspca_dev);
820 if (ret < 0) {
821 destroy_urbs(gspca_dev);
822 goto out;
823 }
63eb9546 824 gspca_dev->streaming = 1;
63eb9546 825
dff369aa 826 /* some bulk transfers are started by the subdriver */
6929dc6b 827 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
51977a8d
JFM		 828 break;
829
63eb9546 830 /* submit the URBs */
db870875
JFM		 831 for (n = 0; n < MAX_NURBS; n++) {
832 urb = gspca_dev->urb[n];
833 if (urb == NULL)
834 break;
835 ret = usb_submit_urb(urb, GFP_KERNEL);
1f53b0b0
JFM		 836 if (ret < 0)
837 break;
63eb9546
JFM		 838 }
839 if (ret >= 0)
840 break;
1f53b0b0
JFM		 841 gspca_dev->streaming = 0;
842 destroy_urbs(gspca_dev);
4bdf4a83
JFM		 843 if (ret != -ENOSPC) {
844 PDEBUG(D_ERR|D_STREAM,
845 "usb_submit_urb alt %d err %d",
846 gspca_dev->alt, ret);
1f53b0b0 847 goto out;
4bdf4a83 848 }
1f53b0b0
JFM		 849
850 /* the bandwidth is not wide enough
851 * negociate or try a lower alternate setting */
4bdf4a83
JFM		 852 PDEBUG(D_ERR|D_STREAM,
853 "bandwidth not wide enough - trying again");
1f53b0b0
JFM		 854 msleep(20); /* wait for kill complete */
855 if (gspca_dev->sd_desc->isoc_nego) {
856 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
857 if (ret < 0)
858 goto out;
859 } else {
860 ep = get_ep(gspca_dev);
861 if (ep == NULL) {
862 ret = -EIO;
863 goto out;
864 }
865 }
63eb9546
JFM		 866 }
867out:
868 mutex_unlock(&gspca_dev->usb_lock);
869 return ret;
870}
871
872static int gspca_set_alt0(struct gspca_dev *gspca_dev)
873{
874 int ret;
875
8dd07ef1
JFM		 876 if (gspca_dev->alt == 0)
877 return 0;
63eb9546
JFM		 878 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
879 if (ret < 0)
f955c4fc 880 PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret);
63eb9546
JFM		 881 return ret;
882}
883
219423c1 884/* Note: both the queue and the usb locks should be held when calling this */
63eb9546
JFM		 885static void gspca_stream_off(struct gspca_dev *gspca_dev)
886{
63eb9546 887 gspca_dev->streaming = 0;
090264e5
JFM		 888 if (gspca_dev->present) {
889 if (gspca_dev->sd_desc->stopN)
890 gspca_dev->sd_desc->stopN(gspca_dev);
891 destroy_urbs(gspca_dev);
0274d42e 892 gspca_input_destroy_urb(gspca_dev);
d08e2ce0 893 gspca_set_alt0(gspca_dev);
0274d42e 894 gspca_input_create_urb(gspca_dev);
090264e5
JFM		 895 }
896
897 /* always call stop0 to free the subdriver's resources */
98522a7b
JFM		 898 if (gspca_dev->sd_desc->stop0)
899 gspca_dev->sd_desc->stop0(gspca_dev);
900 PDEBUG(D_STREAM, "stream off OK");
63eb9546
JFM		 901}
902
d43fa32f 903static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
63eb9546
JFM		 904{
905 int i;
906
907 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
908 gspca_dev->curr_mode = i;
909 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
910 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
c2446b3e 911 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
63eb9546
JFM		 912}
913
914static int wxh_to_mode(struct gspca_dev *gspca_dev,
915 int width, int height)
916{
917 int i;
918
d43fa32f
JFM		 919 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
920 if (width >= gspca_dev->cam.cam_mode[i].width
921 && height >= gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 922 break;
923 }
63eb9546
JFM		 924 return i;
925}
926
63eb9546
JFM		 927/*
928 * search a mode with the right pixel format
929 */
930static int gspca_get_mode(struct gspca_dev *gspca_dev,
931 int mode,
932 int pixfmt)
933{
934 int modeU, modeD;
935
936 modeU = modeD = mode;
937 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
938 if (--modeD >= 0) {
c2446b3e
JFM		 939 if (gspca_dev->cam.cam_mode[modeD].pixelformat
940 == pixfmt)
63eb9546
JFM		 941 return modeD;
942 }
943 if (++modeU < gspca_dev->cam.nmodes) {
c2446b3e
JFM		 944 if (gspca_dev->cam.cam_mode[modeU].pixelformat
945 == pixfmt)
63eb9546
JFM		 946 return modeU;
947 }
948 }
949 return -EINVAL;
950}
951
af1d9afa
BJ		 952#ifdef CONFIG_VIDEO_ADV_DEBUG
953static int vidioc_g_register(struct file *file, void *priv,
954 struct v4l2_dbg_register *reg)
955{
956 int ret;
957 struct gspca_dev *gspca_dev = priv;
958
959 if (!gspca_dev->sd_desc->get_chip_ident)
960 return -EINVAL;
961
962 if (!gspca_dev->sd_desc->get_register)
963 return -EINVAL;
964
965 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
966 return -ERESTARTSYS;
8c4ebae4 967 gspca_dev->usb_err = 0;
af1d9afa
BJ		 968 if (gspca_dev->present)
969 ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
970 else
971 ret = -ENODEV;
972 mutex_unlock(&gspca_dev->usb_lock);
973
974 return ret;
975}
976
977static int vidioc_s_register(struct file *file, void *priv,
978 struct v4l2_dbg_register *reg)
979{
980 int ret;
981 struct gspca_dev *gspca_dev = priv;
982
983 if (!gspca_dev->sd_desc->get_chip_ident)
984 return -EINVAL;
985
986 if (!gspca_dev->sd_desc->set_register)
987 return -EINVAL;
988
989 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
990 return -ERESTARTSYS;
8c4ebae4 991 gspca_dev->usb_err = 0;
af1d9afa
BJ		 992 if (gspca_dev->present)
993 ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
994 else
995 ret = -ENODEV;
996 mutex_unlock(&gspca_dev->usb_lock);
997
998 return ret;
999}
1000#endif
1001
1002static int vidioc_g_chip_ident(struct file *file, void *priv,
1003 struct v4l2_dbg_chip_ident *chip)
1004{
1005 int ret;
1006 struct gspca_dev *gspca_dev = priv;
1007
1008 if (!gspca_dev->sd_desc->get_chip_ident)
1009 return -EINVAL;
1010
1011 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1012 return -ERESTARTSYS;
8c4ebae4 1013 gspca_dev->usb_err = 0;
af1d9afa
BJ		 1014 if (gspca_dev->present)
1015 ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
1016 else
1017 ret = -ENODEV;
1018 mutex_unlock(&gspca_dev->usb_lock);
1019
1020 return ret;
1021}
1022
e078770a 1023static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1024 struct v4l2_fmtdesc *fmtdesc)
1025{
1026 struct gspca_dev *gspca_dev = priv;
6a7eba24 1027 int i, j, index;
63eb9546
JFM		 1028 __u32 fmt_tb[8];
1029
63eb9546
JFM		 1030 /* give an index to each format */
1031 index = 0;
1032 j = 0;
1033 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
c2446b3e 1034 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
63eb9546
JFM		 1035 j = 0;
1036 for (;;) {
1037 if (fmt_tb[j] == fmt_tb[index])
1038 break;
1039 j++;
1040 }
1041 if (j == index) {
1042 if (fmtdesc->index == index)
1043 break; /* new format */
1044 index++;
80297125 1045 if (index >= ARRAY_SIZE(fmt_tb))
63eb9546
JFM		 1046 return -EINVAL;
1047 }
1048 }
1049 if (i < 0)
1050 return -EINVAL; /* no more format */
1051
63eb9546
JFM		 1052 fmtdesc->pixelformat = fmt_tb[index];
1053 if (gspca_is_compressed(fmt_tb[index]))
1054 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1055 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1056 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1057 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1058 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1059 fmtdesc->description[4] = '\0';
1060 return 0;
1061}
1062
e078770a 1063static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1064 struct v4l2_format *fmt)
1065{
1066 struct gspca_dev *gspca_dev = priv;
c2446b3e 1067 int mode;
63eb9546 1068
c2446b3e
JFM		 1069 mode = gspca_dev->curr_mode;
1070 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1071 sizeof fmt->fmt.pix);
63eb9546
JFM		 1072 return 0;
1073}
1074
e078770a 1075static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1076 struct v4l2_format *fmt)
1077{
24c530b4 1078 int w, h, mode, mode2;
63eb9546 1079
4aa0d037
JFM		 1080 w = fmt->fmt.pix.width;
1081 h = fmt->fmt.pix.height;
d43fa32f 1082
335b3f88 1083#ifdef GSPCA_DEBUG
63eb9546
JFM		 1084 if (gspca_debug & D_CONF)
1085 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1086#endif
1087 /* search the closest mode for width and height */
1088 mode = wxh_to_mode(gspca_dev, w, h);
1089
1090 /* OK if right palette */
c2446b3e
JFM		 1091 if (gspca_dev->cam.cam_mode[mode].pixelformat
1092 != fmt->fmt.pix.pixelformat) {
63eb9546
JFM		 1093
1094 /* else, search the closest mode with the same pixel format */
1095 mode2 = gspca_get_mode(gspca_dev, mode,
1096 fmt->fmt.pix.pixelformat);
c2446b3e 1097 if (mode2 >= 0)
63eb9546 1098 mode = mode2;
c2446b3e
JFM		 1099/* else
1100 ; * no chance, return this mode */
63eb9546 1101 }
c2446b3e
JFM		 1102 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1103 sizeof fmt->fmt.pix);
63eb9546
JFM		 1104 return mode; /* used when s_fmt */
1105}
1106
e078770a 1107static int vidioc_try_fmt_vid_cap(struct file *file,
63eb9546
JFM		 1108 void *priv,
1109 struct v4l2_format *fmt)
1110{
4aa0d037 1111 struct gspca_dev *gspca_dev = priv;
63eb9546
JFM		 1112 int ret;
1113
e078770a 1114 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1115 if (ret < 0)
1116 return ret;
1117 return 0;
1118}
1119
e078770a 1120static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1121 struct v4l2_format *fmt)
1122{
1123 struct gspca_dev *gspca_dev = priv;
d43fa32f 1124 int ret;
63eb9546 1125
e2997a72
HG		 1126 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1127 return -ERESTARTSYS;
d43fa32f 1128
e078770a 1129 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1130 if (ret < 0)
1131 goto out;
1132
d43fa32f
JFM		 1133 if (gspca_dev->nframes != 0
1134 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1135 ret = -EINVAL;
1136 goto out;
1137 }
1138
50a871fe
JFM		 1139 if (ret == gspca_dev->curr_mode) {
1140 ret = 0;
63eb9546 1141 goto out; /* same mode */
50a871fe 1142 }
d43fa32f
JFM		 1143
1144 if (gspca_dev->streaming) {
1145 ret = -EBUSY;
1146 goto out;
e2997a72 1147 }
4aa0d037
JFM		 1148 gspca_dev->width = fmt->fmt.pix.width;
1149 gspca_dev->height = fmt->fmt.pix.height;
63eb9546
JFM		 1150 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1151 gspca_dev->curr_mode = ret;
d43fa32f 1152
d43fa32f 1153 ret = 0;
63eb9546
JFM		 1154out:
1155 mutex_unlock(&gspca_dev->queue_lock);
1156 return ret;
1157}
1158
11c635a2
HG		 1159static int vidioc_enum_framesizes(struct file *file, void *priv,
1160 struct v4l2_frmsizeenum *fsize)
1161{
1162 struct gspca_dev *gspca_dev = priv;
1163 int i;
1164 __u32 index = 0;
1165
1166 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1167 if (fsize->pixel_format !=
1168 gspca_dev->cam.cam_mode[i].pixelformat)
1169 continue;
1170
1171 if (fsize->index == index) {
1172 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1173 fsize->discrete.width =
1174 gspca_dev->cam.cam_mode[i].width;
1175 fsize->discrete.height =
1176 gspca_dev->cam.cam_mode[i].height;
1177 return 0;
1178 }
1179 index++;
1180 }
1181
1182 return -EINVAL;
1183}
1184
28ffe77f
AO		 1185static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1186 struct v4l2_frmivalenum *fival)
1187{
1188 struct gspca_dev *gspca_dev = priv;
1189 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1190 __u32 i;
1191
1192 if (gspca_dev->cam.mode_framerates == NULL ||
1193 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1194 return -EINVAL;
1195
1196 if (fival->pixel_format !=
1197 gspca_dev->cam.cam_mode[mode].pixelformat)
1198 return -EINVAL;
1199
1200 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1201 if (fival->index == i) {
1202 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1203 fival->discrete.numerator = 1;
1204 fival->discrete.denominator =
1205 gspca_dev->cam.mode_framerates[mode].rates[i];
1206 return 0;
1207 }
1208 }
1209
1210 return -EINVAL;
1211}
1212
d0182306 1213static void gspca_release(struct video_device *vfd)
6b060ffe 1214{
d0182306 1215 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
6b060ffe 1216
38c7c036
LP		 1217 PDEBUG(D_PROBE, "%s released",
1218 video_device_node_name(&gspca_dev->vdev));
6b060ffe
FZ		 1219
1220 kfree(gspca_dev->usb_buf);
1221 kfree(gspca_dev);
1222}
1223
bec43661 1224static int dev_open(struct file *file)
63eb9546
JFM		 1225{
1226 struct gspca_dev *gspca_dev;
1227 int ret;
1228
0d07e240 1229 PDEBUG(D_STREAM, "[%s] open", current->comm);
a12ca6a6 1230 gspca_dev = (struct gspca_dev *) video_devdata(file);
e2997a72
HG		 1231 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1232 return -ERESTARTSYS;
63eb9546
JFM		 1233 if (!gspca_dev->present) {
1234 ret = -ENODEV;
1235 goto out;
1236 }
1237
012d6b02 1238 if (gspca_dev->users > 4) { /* (arbitrary value) */
63eb9546
JFM		 1239 ret = -EBUSY;
1240 goto out;
1241 }
5c4fa002
JFM		 1242
1243 /* protect the subdriver against rmmod */
1244 if (!try_module_get(gspca_dev->module)) {
1245 ret = -ENODEV;
1246 goto out;
1247 }
1248
63eb9546 1249 gspca_dev->users++;
6b060ffe 1250
63eb9546 1251 file->private_data = gspca_dev;
335b3f88 1252#ifdef GSPCA_DEBUG
63eb9546 1253 /* activate the v4l2 debug */
d43fa32f 1254 if (gspca_debug & D_V4L2)
a12ca6a6 1255 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
9de436cf 1256 | V4L2_DEBUG_IOCTL_ARG;
63eb9546 1257 else
a12ca6a6 1258 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
9de436cf 1259 | V4L2_DEBUG_IOCTL_ARG);
63eb9546 1260#endif
012d6b02 1261 ret = 0;
63eb9546
JFM		 1262out:
1263 mutex_unlock(&gspca_dev->queue_lock);
1264 if (ret != 0)
1265 PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
1266 else
d43fa32f 1267 PDEBUG(D_STREAM, "open done");
63eb9546
JFM		 1268 return ret;
1269}
1270
bec43661 1271static int dev_close(struct file *file)
63eb9546
JFM		 1272{
1273 struct gspca_dev *gspca_dev = file->private_data;
1274
0d07e240 1275 PDEBUG(D_STREAM, "[%s] close", current->comm);
e2997a72
HG		 1276 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1277 return -ERESTARTSYS;
1278 gspca_dev->users--;
e2997a72 1279
5b77ae77 1280 /* if the file did the capture, free the streaming resources */
4aa0d037 1281 if (gspca_dev->capt_file == file) {
a1e8288b
JFM		 1282 if (gspca_dev->streaming) {
1283 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1284 gspca_dev->usb_err = 0;
a1e8288b
JFM		 1285 gspca_stream_off(gspca_dev);
1286 mutex_unlock(&gspca_dev->usb_lock);
1287 }
4aa0d037 1288 frame_free(gspca_dev);
efab8211 1289 gspca_dev->capt_file = NULL;
d43fa32f 1290 gspca_dev->memory = GSPCA_MEMORY_NO;
4aa0d037 1291 }
d43fa32f 1292 file->private_data = NULL;
5c4fa002 1293 module_put(gspca_dev->module);
63eb9546 1294 mutex_unlock(&gspca_dev->queue_lock);
6b060ffe 1295
d43fa32f 1296 PDEBUG(D_STREAM, "close done");
6b060ffe 1297
63eb9546
JFM		 1298 return 0;
1299}
1300
1301static int vidioc_querycap(struct file *file, void *priv,
1302 struct v4l2_capability *cap)
1303{
1304 struct gspca_dev *gspca_dev = priv;
090264e5 1305 int ret;
63eb9546 1306
090264e5
JFM		 1307 /* protect the access to the usb device */
1308 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1309 return -ERESTARTSYS;
1310 if (!gspca_dev->present) {
1311 ret = -ENODEV;
1312 goto out;
1313 }
63eb9546 1314 strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
c6edaf16
JFM		 1315 if (gspca_dev->dev->product != NULL) {
1316 strncpy(cap->card, gspca_dev->dev->product,
1317 sizeof cap->card);
1318 } else {
1319 snprintf(cap->card, sizeof cap->card,
1320 "USB Camera (%04x:%04x)",
1321 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1322 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1323 }
5932028f 1324 usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info));
63eb9546
JFM		 1325 cap->version = DRIVER_VERSION_NUMBER;
1326 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
1327 | V4L2_CAP_STREAMING
1328 | V4L2_CAP_READWRITE;
090264e5
JFM		 1329 ret = 0;
1330out:
1331 mutex_unlock(&gspca_dev->usb_lock);
1332 return ret;
63eb9546
JFM		 1333}
1334
a0001a28
HG		 1335static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev,
1336 int id)
1337{
1338 const struct ctrl *ctrls;
1339 int i;
1340
1341 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1342 i < gspca_dev->sd_desc->nctrls;
1343 i++, ctrls++) {
1344 if (gspca_dev->ctrl_dis & (1 << i))
1345 continue;
1346 if (id == ctrls->qctrl.id)
1347 return ctrls;
1348 }
1349 return NULL;
1350}
1351
63eb9546
JFM		 1352static int vidioc_queryctrl(struct file *file, void *priv,
1353 struct v4l2_queryctrl *q_ctrl)
1354{
1355 struct gspca_dev *gspca_dev = priv;
a0001a28
HG		 1356 const struct ctrl *ctrls;
1357 int i;
6a7eba24
JFM		 1358 u32 id;
1359
a0001a28 1360 ctrls = NULL;
6a7eba24
JFM		 1361 id = q_ctrl->id;
1362 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1363 id &= V4L2_CTRL_ID_MASK;
1364 id++;
1365 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
a0001a28 1366 if (gspca_dev->ctrl_dis & (1 << i))
f50ba1be 1367 continue;
b8bfb5fb 1368 if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
f50ba1be 1369 continue;
b8bfb5fb 1370 if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id
a0001a28 1371 > ctrls->qctrl.id)
b8bfb5fb 1372 continue;
a0001a28 1373 ctrls = &gspca_dev->sd_desc->ctrls[i];
63eb9546 1374 }
83955556
JFM		 1375 if (ctrls == NULL)
1376 return -EINVAL;
a0001a28
HG		 1377 } else {
1378 ctrls = get_ctrl(gspca_dev, id);
83955556
JFM		 1379 if (ctrls == NULL)
1380 return -EINVAL;
4af85668 1381 i = ctrls - gspca_dev->sd_desc->ctrls;
63eb9546 1382 }
a0001a28 1383 memcpy(q_ctrl, ctrls, sizeof *q_ctrl);
4af85668
JFM		 1384 if (gspca_dev->ctrl_inac & (1 << i))
1385 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
f50ba1be 1386 return 0;
63eb9546
JFM		 1387}
1388
1389static int vidioc_s_ctrl(struct file *file, void *priv,
1390 struct v4l2_control *ctrl)
1391{
1392 struct gspca_dev *gspca_dev = priv;
a5ae2062 1393 const struct ctrl *ctrls;
a0001a28 1394 int ret;
63eb9546 1395
a0001a28
HG		 1396 ctrls = get_ctrl(gspca_dev, ctrl->id);
1397 if (ctrls == NULL)
1398 return -EINVAL;
1399
1400 if (ctrl->value < ctrls->qctrl.minimum
1401 || ctrl->value > ctrls->qctrl.maximum)
1402 return -ERANGE;
1403 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1404 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1405 return -ERESTARTSYS;
8c4ebae4 1406 gspca_dev->usb_err = 0;
a0001a28
HG		 1407 if (gspca_dev->present)
1408 ret = ctrls->set(gspca_dev, ctrl->value);
1409 else
1410 ret = -ENODEV;
1411 mutex_unlock(&gspca_dev->usb_lock);
1412 return ret;
63eb9546
JFM		 1413}
1414
1415static int vidioc_g_ctrl(struct file *file, void *priv,
1416 struct v4l2_control *ctrl)
1417{
1418 struct gspca_dev *gspca_dev = priv;
a5ae2062 1419 const struct ctrl *ctrls;
a0001a28 1420 int ret;
63eb9546 1421
a0001a28
HG		 1422 ctrls = get_ctrl(gspca_dev, ctrl->id);
1423 if (ctrls == NULL)
1424 return -EINVAL;
1425
1426 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1427 return -ERESTARTSYS;
8c4ebae4 1428 gspca_dev->usb_err = 0;
a0001a28
HG		 1429 if (gspca_dev->present)
1430 ret = ctrls->get(gspca_dev, &ctrl->value);
1431 else
1432 ret = -ENODEV;
1433 mutex_unlock(&gspca_dev->usb_lock);
1434 return ret;
63eb9546
JFM		 1435}
1436
f955c4fc
JFM		 1437/*fixme: have an audio flag in gspca_dev?*/
1438static int vidioc_s_audio(struct file *file, void *priv,
1439 struct v4l2_audio *audio)
1440{
1441 if (audio->index != 0)
1442 return -EINVAL;
1443 return 0;
1444}
1445
1446static int vidioc_g_audio(struct file *file, void *priv,
1447 struct v4l2_audio *audio)
1448{
f955c4fc
JFM		 1449 strcpy(audio->name, "Microphone");
1450 return 0;
1451}
1452
1453static int vidioc_enumaudio(struct file *file, void *priv,
1454 struct v4l2_audio *audio)
1455{
1456 if (audio->index != 0)
1457 return -EINVAL;
1458
1459 strcpy(audio->name, "Microphone");
1460 audio->capability = 0;
1461 audio->mode = 0;
1462 return 0;
1463}
1464
63eb9546
JFM		 1465static int vidioc_querymenu(struct file *file, void *priv,
1466 struct v4l2_querymenu *qmenu)
1467{
1468 struct gspca_dev *gspca_dev = priv;
1469
1470 if (!gspca_dev->sd_desc->querymenu)
1471 return -EINVAL;
1472 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1473}
1474
1475static int vidioc_enum_input(struct file *file, void *priv,
1476 struct v4l2_input *input)
1477{
1478 struct gspca_dev *gspca_dev = priv;
1479
1480 if (input->index != 0)
1481 return -EINVAL;
63eb9546 1482 input->type = V4L2_INPUT_TYPE_CAMERA;
dfa76fa2 1483 input->status = gspca_dev->cam.input_flags;
63eb9546
JFM		 1484 strncpy(input->name, gspca_dev->sd_desc->name,
1485 sizeof input->name);
1486 return 0;
1487}
1488
1489static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1490{
1491 *i = 0;
1492 return 0;
1493}
1494
1495static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1496{
1497 if (i > 0)
1498 return -EINVAL;
1499 return (0);
1500}
1501
1502static int vidioc_reqbufs(struct file *file, void *priv,
1503 struct v4l2_requestbuffers *rb)
1504{
1505 struct gspca_dev *gspca_dev = priv;
832d0a91 1506 int i, ret = 0, streaming;
63eb9546 1507
d43fa32f 1508 switch (rb->memory) {
5b77ae77 1509 case GSPCA_MEMORY_READ: /* (internal call) */
d43fa32f 1510 case V4L2_MEMORY_MMAP:
d43fa32f 1511 case V4L2_MEMORY_USERPTR:
6a7eba24 1512 break;
d43fa32f 1513 default:
63eb9546 1514 return -EINVAL;
d43fa32f 1515 }
e2997a72
HG		 1516 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1517 return -ERESTARTSYS;
d43fa32f 1518
5b77ae77
JFM		 1519 if (gspca_dev->memory != GSPCA_MEMORY_NO
1520 && gspca_dev->memory != rb->memory) {
4aa0d037
JFM		 1521 ret = -EBUSY;
1522 goto out;
1523 }
d43fa32f 1524
5b77ae77
JFM		 1525 /* only one file may do the capture */
1526 if (gspca_dev->capt_file != NULL
1527 && gspca_dev->capt_file != file) {
1528 ret = -EBUSY;
1529 goto out;
1530 }
1531
1532 /* if allocated, the buffers must not be mapped */
1533 for (i = 0; i < gspca_dev->nframes; i++) {
1534 if (gspca_dev->frame[i].vma_use_count) {
ac0d6df6
JFM		 1535 ret = -EBUSY;
1536 goto out;
1537 }
5b77ae77
JFM		 1538 }
1539
1540 /* stop streaming */
832d0a91
JFM		 1541 streaming = gspca_dev->streaming;
1542 if (streaming) {
5b77ae77 1543 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1544 gspca_dev->usb_err = 0;
5b77ae77
JFM		 1545 gspca_stream_off(gspca_dev);
1546 mutex_unlock(&gspca_dev->usb_lock);
1547 }
1548
1549 /* free the previous allocated buffers, if any */
1550 if (gspca_dev->nframes != 0) {
1551 frame_free(gspca_dev);
1552 gspca_dev->capt_file = NULL;
1553 }
1554 if (rb->count == 0) /* unrequest */
1555 goto out;
1556 gspca_dev->memory = rb->memory;
1557 ret = frame_alloc(gspca_dev, rb->count);
1558 if (ret == 0) {
1559 rb->count = gspca_dev->nframes;
1560 gspca_dev->capt_file = file;
832d0a91
JFM		 1561 if (streaming)
1562 ret = gspca_init_transfer(gspca_dev);
4aa0d037
JFM		 1563 }
1564out:
63eb9546
JFM		 1565 mutex_unlock(&gspca_dev->queue_lock);
1566 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1567 return ret;
1568}
1569
1570static int vidioc_querybuf(struct file *file, void *priv,
1571 struct v4l2_buffer *v4l2_buf)
1572{
1573 struct gspca_dev *gspca_dev = priv;
1574 struct gspca_frame *frame;
1575
13752bd9 1576 if (v4l2_buf->index < 0
63eb9546
JFM		 1577 || v4l2_buf->index >= gspca_dev->nframes)
1578 return -EINVAL;
1579
1580 frame = &gspca_dev->frame[v4l2_buf->index];
1581 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1582 return 0;
1583}
1584
1585static int vidioc_streamon(struct file *file, void *priv,
1586 enum v4l2_buf_type buf_type)
1587{
1588 struct gspca_dev *gspca_dev = priv;
1589 int ret;
1590
63eb9546
JFM		 1591 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1592 return -EINVAL;
e2997a72
HG		 1593 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1594 return -ERESTARTSYS;
090264e5 1595
18bf99aa
JFM		 1596 /* check the capture file */
1597 if (gspca_dev->capt_file != file) {
1598 ret = -EBUSY;
1599 goto out;
1600 }
1601
1edabe71
JFM		 1602 if (gspca_dev->nframes == 0
1603 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
63eb9546
JFM		 1604 ret = -EINVAL;
1605 goto out;
1606 }
1607 if (!gspca_dev->streaming) {
1608 ret = gspca_init_transfer(gspca_dev);
1609 if (ret < 0)
1610 goto out;
1611 }
335b3f88 1612#ifdef GSPCA_DEBUG
63eb9546
JFM		 1613 if (gspca_debug & D_STREAM) {
1614 PDEBUG_MODE("stream on OK",
1615 gspca_dev->pixfmt,
1616 gspca_dev->width,
1617 gspca_dev->height);
1618 }
1619#endif
e2997a72 1620 ret = 0;
63eb9546
JFM		 1621out:
1622 mutex_unlock(&gspca_dev->queue_lock);
1623 return ret;
1624}
1625
1626static int vidioc_streamoff(struct file *file, void *priv,
1627 enum v4l2_buf_type buf_type)
1628{
1629 struct gspca_dev *gspca_dev = priv;
5b77ae77 1630 int i, ret;
63eb9546 1631
63eb9546
JFM		 1632 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1633 return -EINVAL;
4aa0d037
JFM		 1634 if (!gspca_dev->streaming)
1635 return 0;
1636 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1637 return -ERESTARTSYS;
5b77ae77 1638
18bf99aa
JFM		 1639 /* check the capture file */
1640 if (gspca_dev->capt_file != file) {
1641 ret = -EBUSY;
1642 goto out;
1643 }
1644
5b77ae77 1645 /* stop streaming */
4aa0d037
JFM		 1646 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1647 ret = -ERESTARTSYS;
1648 goto out;
63eb9546 1649 }
8c4ebae4 1650 gspca_dev->usb_err = 0;
4aa0d037 1651 gspca_stream_off(gspca_dev);
4aa0d037 1652 mutex_unlock(&gspca_dev->usb_lock);
5b77ae77
JFM		 1653
1654 /* empty the application queues */
1655 for (i = 0; i < gspca_dev->nframes; i++)
1656 gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
1657 gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
1658 gspca_dev->last_packet_type = DISCARD_PACKET;
1659 gspca_dev->sequence = 0;
5b77ae77 1660 ret = 0;
4aa0d037
JFM		 1661out:
1662 mutex_unlock(&gspca_dev->queue_lock);
1663 return ret;
63eb9546
JFM		 1664}
1665
1666static int vidioc_g_jpegcomp(struct file *file, void *priv,
1667 struct v4l2_jpegcompression *jpegcomp)
1668{
1669 struct gspca_dev *gspca_dev = priv;
1670 int ret;
1671
1672 if (!gspca_dev->sd_desc->get_jcomp)
1673 return -EINVAL;
e2997a72
HG		 1674 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1675 return -ERESTARTSYS;
8c4ebae4 1676 gspca_dev->usb_err = 0;
090264e5
JFM		 1677 if (gspca_dev->present)
1678 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1679 else
1680 ret = -ENODEV;
63eb9546
JFM		 1681 mutex_unlock(&gspca_dev->usb_lock);
1682 return ret;
1683}
1684
1685static int vidioc_s_jpegcomp(struct file *file, void *priv,
1686 struct v4l2_jpegcompression *jpegcomp)
1687{
1688 struct gspca_dev *gspca_dev = priv;
1689 int ret;
1690
63eb9546
JFM		 1691 if (!gspca_dev->sd_desc->set_jcomp)
1692 return -EINVAL;
f86d4a91
JP		 1693 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1694 return -ERESTARTSYS;
8c4ebae4 1695 gspca_dev->usb_err = 0;
090264e5
JFM		 1696 if (gspca_dev->present)
1697 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1698 else
1699 ret = -ENODEV;
63eb9546
JFM		 1700 mutex_unlock(&gspca_dev->usb_lock);
1701 return ret;
1702}
1703
1704static int vidioc_g_parm(struct file *filp, void *priv,
1705 struct v4l2_streamparm *parm)
1706{
1707 struct gspca_dev *gspca_dev = priv;
1708
63eb9546 1709 parm->parm.capture.readbuffers = gspca_dev->nbufread;
627a5ef7
JP		 1710
1711 if (gspca_dev->sd_desc->get_streamparm) {
1712 int ret;
1713
1714 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1715 return -ERESTARTSYS;
8c4ebae4 1716 gspca_dev->usb_err = 0;
090264e5
JFM		 1717 if (gspca_dev->present)
1718 ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
1719 parm);
1720 else
1721 ret = -ENODEV;
627a5ef7
JP		 1722 mutex_unlock(&gspca_dev->usb_lock);
1723 return ret;
1724 }
1725
63eb9546
JFM		 1726 return 0;
1727}
1728
1729static int vidioc_s_parm(struct file *filp, void *priv,
1730 struct v4l2_streamparm *parm)
1731{
1732 struct gspca_dev *gspca_dev = priv;
1733 int n;
1734
63eb9546
JFM		 1735 n = parm->parm.capture.readbuffers;
1736 if (n == 0 || n > GSPCA_MAX_FRAMES)
1737 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1738 else
1739 gspca_dev->nbufread = n;
627a5ef7
JP		 1740
1741 if (gspca_dev->sd_desc->set_streamparm) {
1742 int ret;
1743
1744 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1745 return -ERESTARTSYS;
8c4ebae4 1746 gspca_dev->usb_err = 0;
090264e5
JFM		 1747 if (gspca_dev->present)
1748 ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
1749 parm);
1750 else
1751 ret = -ENODEV;
627a5ef7
JP		 1752 mutex_unlock(&gspca_dev->usb_lock);
1753 return ret;
1754 }
1755
63eb9546
JFM		 1756 return 0;
1757}
1758
1759#ifdef CONFIG_VIDEO_V4L1_COMPAT
1760static int vidiocgmbuf(struct file *file, void *priv,
1761 struct video_mbuf *mbuf)
1762{
1763 struct gspca_dev *gspca_dev = file->private_data;
1764 int i;
1765
1766 PDEBUG(D_STREAM, "cgmbuf");
1767 if (gspca_dev->nframes == 0) {
63eb9546 1768 int ret;
6a7eba24
JFM		 1769
1770 {
1771 struct v4l2_format fmt;
1772
6a7eba24
JFM		 1773 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1774 i = gspca_dev->cam.nmodes - 1; /* highest mode */
1775 fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width;
1776 fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height;
1777 fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24;
e078770a 1778 ret = vidioc_s_fmt_vid_cap(file, priv, &fmt);
6a7eba24
JFM		 1779 if (ret != 0)
1780 return ret;
1781 }
1782 {
1783 struct v4l2_requestbuffers rb;
1784
1785 memset(&rb, 0, sizeof rb);
1786 rb.count = 4;
1787 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1788 rb.memory = V4L2_MEMORY_MMAP;
1789 ret = vidioc_reqbufs(file, priv, &rb);
1790 if (ret != 0)
1791 return ret;
1792 }
63eb9546
JFM		 1793 }
1794 mbuf->frames = gspca_dev->nframes;
1795 mbuf->size = gspca_dev->frsz * gspca_dev->nframes;
1796 for (i = 0; i < mbuf->frames; i++)
1797 mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset;
1798 return 0;
1799}
1800#endif
1801
1802static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1803{
1804 struct gspca_dev *gspca_dev = file->private_data;
efab8211 1805 struct gspca_frame *frame;
63eb9546
JFM		 1806 struct page *page;
1807 unsigned long addr, start, size;
1808 int i, ret;
63eb9546
JFM		 1809
1810 start = vma->vm_start;
1811 size = vma->vm_end - vma->vm_start;
1812 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1813
e2997a72
HG		 1814 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1815 return -ERESTARTSYS;
63eb9546
JFM		 1816 if (!gspca_dev->present) {
1817 ret = -ENODEV;
4aa0d037
JFM		 1818 goto out;
1819 }
1820 if (gspca_dev->capt_file != file) {
1821 ret = -EINVAL;
1822 goto out;
63eb9546
JFM		 1823 }
1824
efab8211 1825 frame = NULL;
63eb9546
JFM		 1826 for (i = 0; i < gspca_dev->nframes; ++i) {
1827 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1828 PDEBUG(D_STREAM, "mmap bad memory type");
1829 break;
1830 }
1831 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1832 == vma->vm_pgoff) {
1833 frame = &gspca_dev->frame[i];
1834 break;
1835 }
1836 }
efab8211 1837 if (frame == NULL) {
63eb9546
JFM		 1838 PDEBUG(D_STREAM, "mmap no frame buffer found");
1839 ret = -EINVAL;
4aa0d037 1840 goto out;
63eb9546
JFM		 1841 }
1842#ifdef CONFIG_VIDEO_V4L1_COMPAT
ac0d6df6
JFM		 1843 /* v4l1 maps all the buffers */
1844 if (i != 0
1845 || size != frame->v4l2_buf.length * gspca_dev->nframes)
63eb9546 1846#endif
ac0d6df6 1847 if (size != frame->v4l2_buf.length) {
63eb9546
JFM		 1848 PDEBUG(D_STREAM, "mmap bad size");
1849 ret = -EINVAL;
4aa0d037 1850 goto out;
63eb9546
JFM		 1851 }
1852
1853 /*
1854 * - VM_IO marks the area as being a mmaped region for I/O to a
1855 * device. It also prevents the region from being core dumped.
1856 */
1857 vma->vm_flags |= VM_IO;
1858
1859 addr = (unsigned long) frame->data;
1860 while (size > 0) {
1861 page = vmalloc_to_page((void *) addr);
1862 ret = vm_insert_page(vma, start, page);
1863 if (ret < 0)
4aa0d037 1864 goto out;
63eb9546
JFM		 1865 start += PAGE_SIZE;
1866 addr += PAGE_SIZE;
1867 size -= PAGE_SIZE;
1868 }
1869
d50e257e 1870 vma->vm_ops = &gspca_vm_ops;
63eb9546
JFM		 1871 vma->vm_private_data = frame;
1872 gspca_vm_open(vma);
e2997a72 1873 ret = 0;
4aa0d037 1874out:
63eb9546
JFM		 1875 mutex_unlock(&gspca_dev->queue_lock);
1876 return ret;
1877}
1878
63eb9546
JFM		 1879/*
1880 * wait for a video frame
1881 *
1882 * If a frame is ready, its index is returned.
1883 */
d43fa32f 1884static int frame_wait(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1885 int nonblock_ing)
1886{
1887 struct gspca_frame *frame;
1888 int i, j, ret;
1889
d43fa32f 1890 /* check if a frame is ready */
63eb9546
JFM		 1891 i = gspca_dev->fr_o;
1892 j = gspca_dev->fr_queue[i];
1893 frame = &gspca_dev->frame[j];
63eb9546 1894
181b704f
HG		 1895 if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) {
1896 if (nonblock_ing)
1897 return -EAGAIN;
1898
1899 /* wait till a frame is ready */
4aa0d037 1900 ret = wait_event_interruptible_timeout(gspca_dev->wq,
181b704f
HG		 1901 (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) ||
1902 !gspca_dev->streaming || !gspca_dev->present,
1903 msecs_to_jiffies(3000));
1904 if (ret < 0)
1905 return ret;
1906 if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present)
e2997a72 1907 return -EIO;
63eb9546 1908 }
181b704f 1909
63eb9546
JFM		 1910 gspca_dev->fr_o = (i + 1) % gspca_dev->nframes;
1911 PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d",
1912 gspca_dev->fr_q,
1913 gspca_dev->fr_i,
1914 gspca_dev->fr_o);
e2997a72 1915
739570bb
JFM		 1916 if (gspca_dev->sd_desc->dq_callback) {
1917 mutex_lock(&gspca_dev->usb_lock);
8c4ebae4 1918 gspca_dev->usb_err = 0;
090264e5
JFM		 1919 if (gspca_dev->present)
1920 gspca_dev->sd_desc->dq_callback(gspca_dev);
739570bb
JFM		 1921 mutex_unlock(&gspca_dev->usb_lock);
1922 }
63eb9546
JFM		 1923 return j;
1924}
1925
1926/*
1927 * dequeue a video buffer
1928 *
1929 * If nonblock_ing is false, block until a buffer is available.
1930 */
1931static int vidioc_dqbuf(struct file *file, void *priv,
1932 struct v4l2_buffer *v4l2_buf)
1933{
1934 struct gspca_dev *gspca_dev = priv;
1935 struct gspca_frame *frame;
1936 int i, ret;
1937
1938 PDEBUG(D_FRAM, "dqbuf");
ac0d6df6 1939 if (v4l2_buf->memory != gspca_dev->memory)
63eb9546 1940 return -EINVAL;
5b77ae77 1941
090264e5
JFM		 1942 if (!gspca_dev->present)
1943 return -ENODEV;
1944
5b77ae77
JFM		 1945 /* if not streaming, be sure the application will not loop forever */
1946 if (!(file->f_flags & O_NONBLOCK)
1947 && !gspca_dev->streaming && gspca_dev->users == 1)
63eb9546
JFM		 1948 return -EINVAL;
1949
5b77ae77
JFM		 1950 /* only the capturing file may dequeue */
1951 if (gspca_dev->capt_file != file)
1952 return -EINVAL;
1953
1954 /* only one dequeue / read at a time */
63eb9546
JFM		 1955 if (mutex_lock_interruptible(&gspca_dev->read_lock))
1956 return -ERESTARTSYS;
1957
d43fa32f 1958 ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
63eb9546 1959 if (ret < 0)
4aa0d037 1960 goto out;
63eb9546
JFM		 1961 i = ret; /* frame index */
1962 frame = &gspca_dev->frame[i];
ac0d6df6 1963 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
c6eb8eaf 1964 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
ac0d6df6
JFM		 1965 frame->data,
1966 frame->v4l2_buf.bytesused)) {
1967 PDEBUG(D_ERR|D_STREAM,
1968 "dqbuf cp to user failed");
1969 ret = -EFAULT;
1970 goto out;
1971 }
1972 }
63eb9546
JFM		 1973 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1974 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1975 PDEBUG(D_FRAM, "dqbuf %d", i);
1976 ret = 0;
4aa0d037 1977out:
63eb9546
JFM		 1978 mutex_unlock(&gspca_dev->read_lock);
1979 return ret;
1980}
1981
1982/*
1983 * queue a video buffer
1984 *
1985 * Attempting to queue a buffer that has already been
1986 * queued will return -EINVAL.
1987 */
1988static int vidioc_qbuf(struct file *file, void *priv,
1989 struct v4l2_buffer *v4l2_buf)
1990{
1991 struct gspca_dev *gspca_dev = priv;
1992 struct gspca_frame *frame;
1993 int i, index, ret;
1994
1995 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
63eb9546 1996
5b77ae77
JFM		 1997 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1998 return -ERESTARTSYS;
1999
63eb9546
JFM		 2000 index = v4l2_buf->index;
2001 if ((unsigned) index >= gspca_dev->nframes) {
d43fa32f 2002 PDEBUG(D_FRAM,
63eb9546 2003 "qbuf idx %d >= %d", index, gspca_dev->nframes);
5b77ae77
JFM		 2004 ret = -EINVAL;
2005 goto out;
63eb9546 2006 }
5b77ae77 2007 if (v4l2_buf->memory != gspca_dev->memory) {
d43fa32f 2008 PDEBUG(D_FRAM, "qbuf bad memory type");
5b77ae77
JFM		 2009 ret = -EINVAL;
2010 goto out;
63eb9546 2011 }
e2997a72 2012
5b77ae77 2013 frame = &gspca_dev->frame[index];
d43fa32f
JFM		 2014 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
2015 PDEBUG(D_FRAM, "qbuf bad state");
63eb9546
JFM		 2016 ret = -EINVAL;
2017 goto out;
2018 }
2019
2020 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
63eb9546 2021
d43fa32f 2022 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
63eb9546
JFM		 2023 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
2024 frame->v4l2_buf.length = v4l2_buf->length;
2025 }
2026
2027 /* put the buffer in the 'queued' queue */
2028 i = gspca_dev->fr_q;
2029 gspca_dev->fr_queue[i] = index;
8c32aa59
JFM		 2030 if (gspca_dev->fr_i == i)
2031 gspca_dev->cur_frame = frame;
63eb9546
JFM		 2032 gspca_dev->fr_q = (i + 1) % gspca_dev->nframes;
2033 PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d",
2034 gspca_dev->fr_q,
2035 gspca_dev->fr_i,
2036 gspca_dev->fr_o);
2037
2038 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
2039 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
2040 ret = 0;
2041out:
2042 mutex_unlock(&gspca_dev->queue_lock);
2043 return ret;
2044}
2045
d43fa32f
JFM		 2046/*
2047 * allocate the resources for read()
2048 */
2049static int read_alloc(struct gspca_dev *gspca_dev,
2050 struct file *file)
63eb9546 2051{
63eb9546 2052 struct v4l2_buffer v4l2_buf;
d43fa32f 2053 int i, ret;
63eb9546 2054
d43fa32f 2055 PDEBUG(D_STREAM, "read alloc");
63eb9546
JFM		 2056 if (gspca_dev->nframes == 0) {
2057 struct v4l2_requestbuffers rb;
2058
2059 memset(&rb, 0, sizeof rb);
2060 rb.count = gspca_dev->nbufread;
2061 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2062 rb.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2063 ret = vidioc_reqbufs(file, gspca_dev, &rb);
2064 if (ret != 0) {
d43fa32f 2065 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
63eb9546
JFM		 2066 return ret;
2067 }
2068 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2069 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2070 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2071 for (i = 0; i < gspca_dev->nbufread; i++) {
2072 v4l2_buf.index = i;
63eb9546
JFM		 2073 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2074 if (ret != 0) {
2075 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
2076 return ret;
2077 }
2078 }
d43fa32f
JFM		 2079 gspca_dev->memory = GSPCA_MEMORY_READ;
2080 }
4aa0d037 2081
d43fa32f
JFM		 2082 /* start streaming */
2083 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
2084 if (ret != 0)
2085 PDEBUG(D_STREAM, "read streamon err %d", ret);
2086 return ret;
2087}
2088
2089static unsigned int dev_poll(struct file *file, poll_table *wait)
2090{
2091 struct gspca_dev *gspca_dev = file->private_data;
2092 int i, ret;
2093
2094 PDEBUG(D_FRAM, "poll");
2095
2096 poll_wait(file, &gspca_dev->wq, wait);
d43fa32f 2097
5b77ae77
JFM		 2098 /* if reqbufs is not done, the user would use read() */
2099 if (gspca_dev->nframes == 0) {
2100 if (gspca_dev->memory != GSPCA_MEMORY_NO)
2101 return POLLERR; /* not the 1st time */
d43fa32f 2102 ret = read_alloc(gspca_dev, file);
5b77ae77
JFM		 2103 if (ret != 0)
2104 return POLLERR;
63eb9546
JFM		 2105 }
2106
d43fa32f
JFM		 2107 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
2108 return POLLERR;
d43fa32f 2109
5b77ae77 2110 /* check the next incoming buffer */
d43fa32f
JFM		 2111 i = gspca_dev->fr_o;
2112 i = gspca_dev->fr_queue[i];
2113 if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
2114 ret = POLLIN | POLLRDNORM; /* something to read */
2115 else
2116 ret = 0;
d43fa32f 2117 mutex_unlock(&gspca_dev->queue_lock);
090264e5
JFM		 2118 if (!gspca_dev->present)
2119 return POLLHUP;
d43fa32f
JFM		 2120 return ret;
2121}
2122
2123static ssize_t dev_read(struct file *file, char __user *data,
2124 size_t count, loff_t *ppos)
2125{
2126 struct gspca_dev *gspca_dev = file->private_data;
2127 struct gspca_frame *frame;
2128 struct v4l2_buffer v4l2_buf;
2129 struct timeval timestamp;
82643d0e 2130 int n, ret, ret2;
d43fa32f 2131
a9e11134 2132 PDEBUG(D_FRAM, "read (%zd)", count);
d43fa32f
JFM		 2133 if (!gspca_dev->present)
2134 return -ENODEV;
2135 switch (gspca_dev->memory) {
2136 case GSPCA_MEMORY_NO: /* first time */
2137 ret = read_alloc(gspca_dev, file);
2138 if (ret != 0)
2139 return ret;
2140 break;
2141 case GSPCA_MEMORY_READ:
82643d0e
JFM		 2142 if (gspca_dev->capt_file == file)
2143 break;
2144 /* fall thru */
d43fa32f
JFM		 2145 default:
2146 return -EINVAL;
2147 }
2148
63eb9546 2149 /* get a frame */
2f51d00f 2150 timestamp = ktime_to_timeval(ktime_get());
63eb9546 2151 timestamp.tv_sec--;
82643d0e
JFM		 2152 n = 2;
2153 for (;;) {
63eb9546
JFM		 2154 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2155 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 2156 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 2157 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2158 if (ret != 0) {
2159 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2160 return ret;
2161 }
2162
2163 /* if the process slept for more than 1 second,
219423c1 2164 * get a newer frame */
63eb9546 2165 frame = &gspca_dev->frame[v4l2_buf.index];
82643d0e
JFM		 2166 if (--n < 0)
2167 break; /* avoid infinite loop */
63eb9546
JFM		 2168 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2169 break;
2170 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2171 if (ret != 0) {
2172 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2173 return ret;
2174 }
2175 }
2176
2177 /* copy the frame */
ac0d6df6
JFM		 2178 if (count > frame->v4l2_buf.bytesused)
2179 count = frame->v4l2_buf.bytesused;
63eb9546
JFM		 2180 ret = copy_to_user(data, frame->data, count);
2181 if (ret != 0) {
2182 PDEBUG(D_ERR|D_STREAM,
a9e11134 2183 "read cp to user lack %d / %zd", ret, count);
63eb9546
JFM		 2184 ret = -EFAULT;
2185 goto out;
2186 }
2187 ret = count;
2188out:
2189 /* in each case, requeue the buffer */
2190 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2191 if (ret2 != 0)
2192 return ret2;
2193 return ret;
2194}
2195
bec43661 2196static struct v4l2_file_operations dev_fops = {
63eb9546
JFM		 2197 .owner = THIS_MODULE,
2198 .open = dev_open,
2199 .release = dev_close,
2200 .read = dev_read,
2201 .mmap = dev_mmap,
bec43661 2202 .unlocked_ioctl = video_ioctl2,
63eb9546
JFM		 2203 .poll = dev_poll,
2204};
2205
a399810c 2206static const struct v4l2_ioctl_ops dev_ioctl_ops = {
63eb9546
JFM		 2207 .vidioc_querycap = vidioc_querycap,
2208 .vidioc_dqbuf = vidioc_dqbuf,
2209 .vidioc_qbuf = vidioc_qbuf,
e078770a
MCC		 2210 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2211 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2212 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2213 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
63eb9546
JFM		 2214 .vidioc_streamon = vidioc_streamon,
2215 .vidioc_queryctrl = vidioc_queryctrl,
2216 .vidioc_g_ctrl = vidioc_g_ctrl,
2217 .vidioc_s_ctrl = vidioc_s_ctrl,
f955c4fc
JFM		 2218 .vidioc_g_audio = vidioc_g_audio,
2219 .vidioc_s_audio = vidioc_s_audio,
2220 .vidioc_enumaudio = vidioc_enumaudio,
63eb9546
JFM		 2221 .vidioc_querymenu = vidioc_querymenu,
2222 .vidioc_enum_input = vidioc_enum_input,
2223 .vidioc_g_input = vidioc_g_input,
2224 .vidioc_s_input = vidioc_s_input,
2225 .vidioc_reqbufs = vidioc_reqbufs,
2226 .vidioc_querybuf = vidioc_querybuf,
2227 .vidioc_streamoff = vidioc_streamoff,
2228 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2229 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2230 .vidioc_g_parm = vidioc_g_parm,
2231 .vidioc_s_parm = vidioc_s_parm,
11c635a2 2232 .vidioc_enum_framesizes = vidioc_enum_framesizes,
28ffe77f 2233 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
af1d9afa
BJ		 2234#ifdef CONFIG_VIDEO_ADV_DEBUG
2235 .vidioc_g_register = vidioc_g_register,
2236 .vidioc_s_register = vidioc_s_register,
2237#endif
2238 .vidioc_g_chip_ident = vidioc_g_chip_ident,
63eb9546
JFM		 2239#ifdef CONFIG_VIDEO_V4L1_COMPAT
2240 .vidiocgmbuf = vidiocgmbuf,
2241#endif
2242};
2243
a399810c
HV		 2244static struct video_device gspca_template = {
2245 .name = "gspca main driver",
a399810c
HV		 2246 .fops = &dev_fops,
2247 .ioctl_ops = &dev_ioctl_ops,
d0182306 2248 .release = gspca_release,
a399810c
HV		 2249};
2250
63eb9546
JFM		 2251/*
2252 * probe and create a new gspca device
2253 *
2254 * This function must be called by the sub-driver when it is
2255 * called for probing a new device.
2256 */
2257int gspca_dev_probe(struct usb_interface *intf,
2258 const struct usb_device_id *id,
2259 const struct sd_desc *sd_desc,
d43fa32f
JFM		 2260 int dev_size,
2261 struct module *module)
63eb9546
JFM		 2262{
2263 struct usb_interface_descriptor *interface;
2264 struct gspca_dev *gspca_dev;
2265 struct usb_device *dev = interface_to_usbdev(intf);
2266 int ret;
63eb9546 2267
6a7eba24 2268 PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
63eb9546
JFM		 2269
2270 /* we don't handle multi-config cameras */
0d07e240
JFM		 2271 if (dev->descriptor.bNumConfigurations != 1) {
2272 PDEBUG(D_ERR, "Too many config");
63eb9546 2273 return -ENODEV;
0d07e240 2274 }
52a9d3ef 2275
b7a597d1 2276 /* the USB video interface must be the first one */
63eb9546 2277 interface = &intf->cur_altsetting->desc;
b7a597d1
JFM		 2278 if (dev->config->desc.bNumInterfaces != 1 &&
2279 interface->bInterfaceNumber != 0)
63eb9546
JFM		 2280 return -ENODEV;
2281
2282 /* create the device */
2283 if (dev_size < sizeof *gspca_dev)
2284 dev_size = sizeof *gspca_dev;
2285 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
e293e599 2286 if (!gspca_dev) {
63eb9546 2287 err("couldn't kzalloc gspca struct");
e293e599 2288 return -ENOMEM;
63eb9546 2289 }
8295d99e
JFM		 2290 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2291 if (!gspca_dev->usb_buf) {
2292 err("out of memory");
e293e599 2293 ret = -ENOMEM;
8295d99e
JFM		 2294 goto out;
2295 }
63eb9546
JFM		 2296 gspca_dev->dev = dev;
2297 gspca_dev->iface = interface->bInterfaceNumber;
d43fa32f 2298 gspca_dev->nbalt = intf->num_altsetting;
63eb9546 2299 gspca_dev->sd_desc = sd_desc;
63eb9546 2300 gspca_dev->nbufread = 2;
ff374747 2301 gspca_dev->empty_packet = -1; /* don't check the empty packets */
63eb9546 2302
012d6b02 2303 /* configure the subdriver and initialize the USB device */
ba38ee8e 2304 ret = sd_desc->config(gspca_dev, id);
012d6b02
JFM		 2305 if (ret < 0)
2306 goto out;
ba38ee8e 2307 ret = sd_desc->init(gspca_dev);
63eb9546
JFM		 2308 if (ret < 0)
2309 goto out;
2310 gspca_set_default_mode(gspca_dev);
2311
10ee2402
HG		 2312 ret = gspca_input_connect(gspca_dev);
2313 if (ret)
2314 goto out;
2315
63eb9546
JFM		 2316 mutex_init(&gspca_dev->usb_lock);
2317 mutex_init(&gspca_dev->read_lock);
2318 mutex_init(&gspca_dev->queue_lock);
2319 init_waitqueue_head(&gspca_dev->wq);
2320
2321 /* init video stuff */
ba38ee8e 2322 memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
24441631 2323 gspca_dev->vdev.parent = &intf->dev;
5c4fa002 2324 gspca_dev->module = module;
ee56a4d3 2325 gspca_dev->present = 1;
a12ca6a6 2326 ret = video_register_device(&gspca_dev->vdev,
63eb9546 2327 VFL_TYPE_GRABBER,
8d584a53 2328 -1);
63eb9546
JFM		 2329 if (ret < 0) {
2330 err("video_register_device err %d", ret);
2331 goto out;
2332 }
2333
63eb9546 2334 usb_set_intfdata(intf, gspca_dev);
38c7c036 2335 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
0274d42e 2336
10ee2402 2337 gspca_input_create_urb(gspca_dev);
0274d42e 2338
63eb9546
JFM		 2339 return 0;
2340out:
f7628015 2341#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
10ee2402
HG		 2342 if (gspca_dev->input_dev)
2343 input_unregister_device(gspca_dev->input_dev);
e7637521 2344#endif
e07a1d8a
JFM		 2345 kfree(gspca_dev->usb_buf);
2346 kfree(gspca_dev);
63eb9546
JFM		 2347 return ret;
2348}
2349EXPORT_SYMBOL(gspca_dev_probe);
2350
2351/*
2352 * USB disconnection
2353 *
2354 * This function must be called by the sub-driver
2355 * when the device disconnects, after the specific resources are freed.
2356 */
2357void gspca_disconnect(struct usb_interface *intf)
2358{
4aa0d037 2359 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
f7628015 2360#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e 2361 struct input_dev *input_dev;
e070bf9e 2362#endif
63eb9546 2363
38c7c036
LP		 2364 PDEBUG(D_PROBE, "%s disconnect",
2365 video_device_node_name(&gspca_dev->vdev));
ad28127d 2366 mutex_lock(&gspca_dev->usb_lock);
6e4ae872 2367 gspca_dev->present = 0;
6e4ae872 2368
090264e5
JFM		 2369 if (gspca_dev->streaming) {
2370 destroy_urbs(gspca_dev);
2371 wake_up_interruptible(&gspca_dev->wq);
2372 }
2373
f7628015 2374#if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
0274d42e
MN		 2375 gspca_input_destroy_urb(gspca_dev);
2376 input_dev = gspca_dev->input_dev;
2377 if (input_dev) {
2378 gspca_dev->input_dev = NULL;
2379 input_unregister_device(input_dev);
2380 }
e070bf9e 2381#endif
0274d42e 2382
090264e5 2383 /* the device is freed at exit of this function */
ad28127d 2384 gspca_dev->dev = NULL;
090264e5
JFM		 2385 mutex_unlock(&gspca_dev->usb_lock);
2386
6b060ffe
FZ		 2387 usb_set_intfdata(intf, NULL);
2388
a12ca6a6
JFM		 2389 /* release the device */
2390 /* (this will call gspca_release() immediatly or on last close) */
2391 video_unregister_device(&gspca_dev->vdev);
3145b8c1 2392
0d07e240 2393/* PDEBUG(D_PROBE, "disconnect complete"); */
63eb9546
JFM		 2394}
2395EXPORT_SYMBOL(gspca_disconnect);
2396
6a709749
JFM		 2397#ifdef CONFIG_PM
2398int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2399{
2400 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2401
2402 if (!gspca_dev->streaming)
2403 return 0;
2404 gspca_dev->frozen = 1; /* avoid urb error messages */
012d6b02
JFM		 2405 if (gspca_dev->sd_desc->stopN)
2406 gspca_dev->sd_desc->stopN(gspca_dev);
6a709749 2407 destroy_urbs(gspca_dev);
0274d42e 2408 gspca_input_destroy_urb(gspca_dev);
6a709749 2409 gspca_set_alt0(gspca_dev);
012d6b02
JFM		 2410 if (gspca_dev->sd_desc->stop0)
2411 gspca_dev->sd_desc->stop0(gspca_dev);
6a709749
JFM		 2412 return 0;
2413}
2414EXPORT_SYMBOL(gspca_suspend);
2415
2416int gspca_resume(struct usb_interface *intf)
2417{
2418 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2419
2420 gspca_dev->frozen = 0;
012d6b02 2421 gspca_dev->sd_desc->init(gspca_dev);
0274d42e 2422 gspca_input_create_urb(gspca_dev);
012d6b02
JFM		 2423 if (gspca_dev->streaming)
2424 return gspca_init_transfer(gspca_dev);
1e89e2da 2425 return 0;
6a709749
JFM		 2426}
2427EXPORT_SYMBOL(gspca_resume);
2428#endif
dcef3237
HG		 2429/* -- cam driver utility functions -- */
2430
2431/* auto gain and exposure algorithm based on the knee algorithm described here:
2432 http://ytse.tricolour.net/docs/LowLightOptimization.html
2433
2434 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2435 where changed. */
2436int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2437 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2438{
2439 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2440 const struct ctrl *gain_ctrl = NULL;
2441 const struct ctrl *exposure_ctrl = NULL;
2442 const struct ctrl *autogain_ctrl = NULL;
2443 int retval = 0;
2444
2445 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
26984b09
HG		 2446 if (gspca_dev->ctrl_dis & (1 << i))
2447 continue;
dcef3237
HG		 2448 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2449 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2450 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2451 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2452 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2453 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2454 }
2455 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2456 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2457 "on cam without (auto)gain/exposure");
2458 return 0;
2459 }
2460
2461 if (gain_ctrl->get(gspca_dev, &gain) ||
2462 exposure_ctrl->get(gspca_dev, &exposure) ||
2463 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2464 return 0;
2465
2466 orig_gain = gain;
2467 orig_exposure = exposure;
2468
2469 /* If we are of a multiple of deadzone, do multiple steps to reach the
2470 desired lumination fast (with the risc of a slight overshoot) */
2471 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2472
1c44d81d 2473 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
dcef3237
HG		 2474 avg_lum, desired_avg_lum, steps);
2475
2476 for (i = 0; i < steps; i++) {
2477 if (avg_lum > desired_avg_lum) {
2478 if (gain > gain_knee)
2479 gain--;
2480 else if (exposure > exposure_knee)
2481 exposure--;
2482 else if (gain > gain_ctrl->qctrl.default_value)
2483 gain--;
2484 else if (exposure > exposure_ctrl->qctrl.minimum)
2485 exposure--;
2486 else if (gain > gain_ctrl->qctrl.minimum)
2487 gain--;
2488 else
2489 break;
2490 } else {
2491 if (gain < gain_ctrl->qctrl.default_value)
2492 gain++;
2493 else if (exposure < exposure_knee)
2494 exposure++;
2495 else if (gain < gain_knee)
2496 gain++;
2497 else if (exposure < exposure_ctrl->qctrl.maximum)
2498 exposure++;
2499 else if (gain < gain_ctrl->qctrl.maximum)
2500 gain++;
2501 else
2502 break;
2503 }
2504 }
2505
2506 if (gain != orig_gain) {
2507 gain_ctrl->set(gspca_dev, gain);
2508 retval = 1;
2509 }
2510 if (exposure != orig_exposure) {
2511 exposure_ctrl->set(gspca_dev, exposure);
2512 retval = 1;
2513 }
2514
2515 return retval;
2516}
2517EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2518
63eb9546
JFM		 2519/* -- module insert / remove -- */
2520static int __init gspca_init(void)
2521{
bb64e86c
JFM		 2522 info("main v%d.%d.%d registered",
2523 (DRIVER_VERSION_NUMBER >> 16) & 0xff,
2524 (DRIVER_VERSION_NUMBER >> 8) & 0xff,
2525 DRIVER_VERSION_NUMBER & 0xff);
63eb9546
JFM		 2526 return 0;
2527}
2528static void __exit gspca_exit(void)
2529{
2530 info("main deregistered");
2531}
2532
2533module_init(gspca_init);
2534module_exit(gspca_exit);
2535
335b3f88 2536#ifdef GSPCA_DEBUG
63eb9546
JFM		 2537module_param_named(debug, gspca_debug, int, 0644);
2538MODULE_PARM_DESC(debug,
2539 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
d43fa32f
JFM		 2540 " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout"
2541 " 0x0100: v4l2");
6a7eba24 2542#endif
Linux 6.x block layer and io_uring tree(s)