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Merge remote-tracking branch 'battery/for-next'
[deliverable/linux.git] / drivers / media / usb / gspca / gspca.c
CommitLineData
63eb9546
JFM		 1/*
2 * Main USB camera driver
3 *
59929cef 4 * Copyright (C) 2008-2011 Jean-François Moine <http://moinejf.free.fr>
63eb9546 5 *
0274d42e
MN		 6 * Camera button input handling by Márton Németh
7 * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
8 *
63eb9546
JFM		 9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 * for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
133a9fe9
JP		 24#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
25
f22123fa 26#define GSPCA_VERSION "2.14.0"
63eb9546
JFM		 27
28#include <linux/init.h>
29#include <linux/fs.h>
30#include <linux/vmalloc.h>
31#include <linux/sched.h>
32#include <linux/slab.h>
33#include <linux/mm.h>
34#include <linux/string.h>
35#include <linux/pagemap.h>
956e42d2 36#include <linux/io.h>
63eb9546 37#include <asm/page.h>
956e42d2 38#include <linux/uaccess.h>
2f51d00f 39#include <linux/ktime.h>
35ea11ff 40#include <media/v4l2-ioctl.h>
62bba5dd 41#include <media/v4l2-ctrls.h>
2333565d 42#include <media/v4l2-fh.h>
d57fb9f8 43#include <media/v4l2-event.h>
63eb9546
JFM		 44
45#include "gspca.h"
46
13a00fab 47#if IS_ENABLED(CONFIG_INPUT)
0274d42e
MN		 48#include <linux/input.h>
49#include <linux/usb/input.h>
e070bf9e 50#endif
0274d42e 51
d43fa32f 52/* global values */
8fee8453
JFM		 53#define DEF_NURBS 3 /* default number of URBs */
54#if DEF_NURBS > MAX_NURBS
55#error "DEF_NURBS too big"
56#endif
d43fa32f 57
27c6f9e5 58MODULE_AUTHOR("Jean-François Moine <http://moinejf.free.fr>");
63eb9546
JFM		 59MODULE_DESCRIPTION("GSPCA USB Camera Driver");
60MODULE_LICENSE("GPL");
f22123fa 61MODULE_VERSION(GSPCA_VERSION);
63eb9546 62
c93396e1 63int gspca_debug;
63eb9546
JFM		 64EXPORT_SYMBOL(gspca_debug);
65
c93396e1
TK		 66static void PDEBUG_MODE(struct gspca_dev *gspca_dev, int debug, char *txt,
67 __u32 pixfmt, int w, int h)
63eb9546
JFM		 68{
69 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
c93396e1 70 PDEBUG(debug, "%s %c%c%c%c %dx%d",
63eb9546
JFM		 71 txt,
72 pixfmt & 0xff,
73 (pixfmt >> 8) & 0xff,
74 (pixfmt >> 16) & 0xff,
75 pixfmt >> 24,
76 w, h);
77 } else {
c93396e1 78 PDEBUG(debug, "%s 0x%08x %dx%d",
63eb9546
JFM		 79 txt,
80 pixfmt,
81 w, h);
82 }
83}
63eb9546 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 */
13a00fab 118#if IS_ENABLED(CONFIG_INPUT)
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) {
c93396e1 129 PERR("Unknown packet received");
0274d42e
MN		 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:
c93396e1 143 PERR("URB error %i, resubmitting", urb->status);
0274d42e
MN		 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)
133a9fe9 151 pr_err("Resubmit URB failed with error %i\n", ret);
0274d42e
MN		 152 }
153}
154
155static int gspca_input_connect(struct gspca_dev *dev)
156{
157 struct input_dev *input_dev;
158 int err = 0;
159
160 dev->input_dev = NULL;
ac82f59f 161 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
0274d42e
MN		 162 input_dev = input_allocate_device();
163 if (!input_dev)
164 return -ENOMEM;
165
166 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
167 strlcat(dev->phys, "/input0", sizeof(dev->phys));
168
169 input_dev->name = dev->sd_desc->name;
170 input_dev->phys = dev->phys;
171
172 usb_to_input_id(dev->dev, &input_dev->id);
173
174 input_dev->evbit[0] = BIT_MASK(EV_KEY);
175 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
176 input_dev->dev.parent = &dev->dev->dev;
177
178 err = input_register_device(input_dev);
179 if (err) {
133a9fe9
JP		 180 pr_err("Input device registration failed with error %i\n",
181 err);
0274d42e
MN		 182 input_dev->dev.parent = NULL;
183 input_free_device(input_dev);
184 } else {
185 dev->input_dev = input_dev;
186 }
10ee2402 187 }
0274d42e
MN		 188
189 return err;
190}
191
192static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
193 struct usb_endpoint_descriptor *ep)
194{
195 unsigned int buffer_len;
196 int interval;
197 struct urb *urb;
198 struct usb_device *dev;
199 void *buffer = NULL;
200 int ret = -EINVAL;
201
b26d6e21 202 buffer_len = le16_to_cpu(ep->wMaxPacketSize);
0274d42e 203 interval = ep->bInterval;
c4dc692c 204 PDEBUG(D_CONF, "found int in endpoint: 0x%x, "
0274d42e
MN		 205 "buffer_len=%u, interval=%u",
206 ep->bEndpointAddress, buffer_len, interval);
207
208 dev = gspca_dev->dev;
209
210 urb = usb_alloc_urb(0, GFP_KERNEL);
211 if (!urb) {
212 ret = -ENOMEM;
213 goto error;
214 }
215
7a9b1492 216 buffer = usb_alloc_coherent(dev, buffer_len,
0274d42e
MN		 217 GFP_KERNEL, &urb->transfer_dma);
218 if (!buffer) {
219 ret = -ENOMEM;
220 goto error_buffer;
221 }
222 usb_fill_int_urb(urb, dev,
223 usb_rcvintpipe(dev, ep->bEndpointAddress),
224 buffer, buffer_len,
225 int_irq, (void *)gspca_dev, interval);
882787ff 226 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
0274d42e
MN		 227 ret = usb_submit_urb(urb, GFP_KERNEL);
228 if (ret < 0) {
c93396e1 229 PERR("submit int URB failed with error %i", ret);
0274d42e
MN		 230 goto error_submit;
231 }
2661da47 232 gspca_dev->int_urb = urb;
0274d42e
MN		 233 return ret;
234
235error_submit:
997ea58e
DM		 236 usb_free_coherent(dev,
237 urb->transfer_buffer_length,
238 urb->transfer_buffer,
239 urb->transfer_dma);
0274d42e
MN		 240error_buffer:
241 usb_free_urb(urb);
242error:
243 return ret;
244}
245
10ee2402 246static void gspca_input_create_urb(struct gspca_dev *gspca_dev)
0274d42e 247{
0274d42e
MN		 248 struct usb_interface *intf;
249 struct usb_host_interface *intf_desc;
250 struct usb_endpoint_descriptor *ep;
251 int i;
252
253 if (gspca_dev->sd_desc->int_pkt_scan) {
254 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
255 intf_desc = intf->cur_altsetting;
256 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
257 ep = &intf_desc->endpoint[i].desc;
258 if (usb_endpoint_dir_in(ep) &&
259 usb_endpoint_xfer_int(ep)) {
260
10ee2402 261 alloc_and_submit_int_urb(gspca_dev, ep);
0274d42e
MN		 262 break;
263 }
264 }
265 }
0274d42e
MN		 266}
267
268static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
269{
270 struct urb *urb;
271
272 urb = gspca_dev->int_urb;
273 if (urb) {
274 gspca_dev->int_urb = NULL;
275 usb_kill_urb(urb);
997ea58e
DM		 276 usb_free_coherent(gspca_dev->dev,
277 urb->transfer_buffer_length,
278 urb->transfer_buffer,
279 urb->transfer_dma);
0274d42e
MN		 280 usb_free_urb(urb);
281 }
282}
f7628015
RD		 283#else
284static inline void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
285{
286}
287
288static inline void gspca_input_create_urb(struct gspca_dev *gspca_dev)
289{
290}
291
292static inline int gspca_input_connect(struct gspca_dev *dev)
293{
294 return 0;
295}
0274d42e
MN		 296#endif
297
63eb9546 298/*
d43fa32f 299 * fill a video frame from an URB and resubmit
63eb9546 300 */
d43fa32f
JFM		 301static void fill_frame(struct gspca_dev *gspca_dev,
302 struct urb *urb)
63eb9546 303{
8d584a53 304 u8 *data; /* address of data in the iso message */
1b60e1ad 305 int i, len, st;
63eb9546
JFM		 306 cam_pkt_op pkt_scan;
307
6a7eba24 308 if (urb->status != 0) {
090264e5
JFM		 309 if (urb->status == -ESHUTDOWN)
310 return; /* disconnection */
62ee8eee 311#ifdef CONFIG_PM
6a540bdf
HG		 312 if (gspca_dev->frozen)
313 return;
62ee8eee 314#endif
c93396e1 315 PERR("urb status: %d", urb->status);
8157852f 316 urb->status = 0;
bf926adf 317 goto resubmit;
6a7eba24 318 }
63eb9546
JFM		 319 pkt_scan = gspca_dev->sd_desc->pkt_scan;
320 for (i = 0; i < urb->number_of_packets; i++) {
95f18be2 321 len = urb->iso_frame_desc[i].actual_length;
63eb9546 322
63eb9546 323 /* check the packet status and length */
63eb9546
JFM		 324 st = urb->iso_frame_desc[i].status;
325 if (st) {
133a9fe9
JP		 326 pr_err("ISOC data error: [%d] len=%d, status=%d\n",
327 i, len, st);
63eb9546
JFM		 328 gspca_dev->last_packet_type = DISCARD_PACKET;
329 continue;
330 }
76ebc16b
JFM		 331 if (len == 0) {
332 if (gspca_dev->empty_packet == 0)
333 gspca_dev->empty_packet = 1;
334 continue;
335 }
63eb9546
JFM		 336
337 /* let the packet be analyzed by the subdriver */
338 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
339 i, urb->iso_frame_desc[i].offset, len);
8d584a53 340 data = (u8 *) urb->transfer_buffer
63eb9546 341 + urb->iso_frame_desc[i].offset;
76dd272b 342 pkt_scan(gspca_dev, data, len);
63eb9546
JFM		 343 }
344
bf926adf 345resubmit:
63eb9546 346 /* resubmit the URB */
63eb9546
JFM		 347 st = usb_submit_urb(urb, GFP_ATOMIC);
348 if (st < 0)
133a9fe9 349 pr_err("usb_submit_urb() ret %d\n", st);
63eb9546
JFM		 350}
351
d43fa32f
JFM		 352/*
353 * ISOC message interrupt from the USB device
354 *
ac0d6df6 355 * Analyse each packet and call the subdriver for copy to the frame buffer.
d43fa32f 356 */
8d584a53 357static void isoc_irq(struct urb *urb)
d43fa32f
JFM		 358{
359 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
360
3647fea8 361 PDEBUG(D_PACK, "isoc irq");
d43fa32f
JFM		 362 if (!gspca_dev->streaming)
363 return;
364 fill_frame(gspca_dev, urb);
365}
366
0be01004
JFM		 367/*
368 * bulk message interrupt from the USB device
369 */
8d584a53 370static void bulk_irq(struct urb *urb)
0be01004
JFM		 371{
372 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
dff369aa 373 int st;
0be01004
JFM		 374
375 PDEBUG(D_PACK, "bulk irq");
376 if (!gspca_dev->streaming)
377 return;
880ae24d
JFM		 378 switch (urb->status) {
379 case 0:
380 break;
090264e5
JFM		 381 case -ESHUTDOWN:
382 return; /* disconnection */
880ae24d 383 default:
0be01004 384#ifdef CONFIG_PM
6a540bdf
HG		 385 if (gspca_dev->frozen)
386 return;
0be01004 387#endif
c93396e1 388 PERR("urb status: %d", urb->status);
8157852f 389 urb->status = 0;
bf926adf 390 goto resubmit;
0be01004
JFM		 391 }
392
d131c3c9
JFM		 393 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
394 gspca_dev->sd_desc->pkt_scan(gspca_dev,
d131c3c9
JFM		 395 urb->transfer_buffer,
396 urb->actual_length);
dff369aa 397
bf926adf 398resubmit:
dff369aa
AO		 399 /* resubmit the URB */
400 if (gspca_dev->cam.bulk_nurbs != 0) {
401 st = usb_submit_urb(urb, GFP_ATOMIC);
402 if (st < 0)
133a9fe9 403 pr_err("usb_submit_urb() ret %d\n", st);
dff369aa 404 }
0be01004
JFM		 405}
406
63eb9546
JFM		 407/*
408 * add data to the current frame
409 *
ac0d6df6
JFM		 410 * This function is called by the subdrivers at interrupt level.
411 *
63eb9546
JFM		 412 * To build a frame, these ones must add
413 * - one FIRST_PACKET
414 * - 0 or many INTER_PACKETs
415 * - one LAST_PACKET
416 * DISCARD_PACKET invalidates the whole frame.
63eb9546 417 */
76dd272b
JFM		 418void gspca_frame_add(struct gspca_dev *gspca_dev,
419 enum gspca_packet_type packet_type,
420 const u8 *data,
421 int len)
63eb9546 422{
3ec342f2 423 struct gspca_frame *frame;
63eb9546
JFM		 424 int i, j;
425
e2997a72 426 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
d131c3c9 427
63eb9546 428 if (packet_type == FIRST_PACKET) {
f7059eaa
JFM		 429 i = atomic_read(&gspca_dev->fr_i);
430
431 /* if there are no queued buffer, discard the whole frame */
432 if (i == atomic_read(&gspca_dev->fr_q)) {
433 gspca_dev->last_packet_type = DISCARD_PACKET;
2e0544a8 434 gspca_dev->sequence++;
f7059eaa
JFM		 435 return;
436 }
b192ca98
JFM		 437 j = gspca_dev->fr_queue[i];
438 frame = &gspca_dev->frame[j];
5ba0e2c3 439 v4l2_get_timestamp(&frame->v4l2_buf.timestamp);
2e0544a8 440 frame->v4l2_buf.sequence = gspca_dev->sequence++;
f7059eaa 441 gspca_dev->image = frame->data;
b192ca98 442 gspca_dev->image_len = 0;
fe988f56
JFM		 443 } else {
444 switch (gspca_dev->last_packet_type) {
445 case DISCARD_PACKET:
fa4376d2 446 if (packet_type == LAST_PACKET) {
fe988f56 447 gspca_dev->last_packet_type = packet_type;
fa4376d2
HG		 448 gspca_dev->image = NULL;
449 gspca_dev->image_len = 0;
450 }
fe988f56
JFM		 451 return;
452 case LAST_PACKET:
453 return;
454 }
d43fa32f 455 }
63eb9546 456
d43fa32f 457 /* append the packet to the frame buffer */
63eb9546 458 if (len > 0) {
b192ca98 459 if (gspca_dev->image_len + len > gspca_dev->frsz) {
c93396e1 460 PERR("frame overflow %d > %d",
b192ca98
JFM		 461 gspca_dev->image_len + len,
462 gspca_dev->frsz);
63eb9546
JFM		 463 packet_type = DISCARD_PACKET;
464 } else {
fe988f56
JFM		 465/* !! image is NULL only when last pkt is LAST or DISCARD
466 if (gspca_dev->image == NULL) {
133a9fe9 467 pr_err("gspca_frame_add() image == NULL\n");
fe988f56
JFM		 468 return;
469 }
470 */
b192ca98
JFM		 471 memcpy(gspca_dev->image + gspca_dev->image_len,
472 data, len);
473 gspca_dev->image_len += len;
63eb9546
JFM		 474 }
475 }
476 gspca_dev->last_packet_type = packet_type;
477
f7059eaa
JFM		 478 /* if last packet, invalidate packet concatenation until
479 * next first packet, wake up the application and advance
480 * in the queue */
63eb9546 481 if (packet_type == LAST_PACKET) {
f7059eaa 482 i = atomic_read(&gspca_dev->fr_i);
b192ca98
JFM		 483 j = gspca_dev->fr_queue[i];
484 frame = &gspca_dev->frame[j];
485 frame->v4l2_buf.bytesused = gspca_dev->image_len;
02bbcb9d
JFM		 486 frame->v4l2_buf.flags = (frame->v4l2_buf.flags
487 | V4L2_BUF_FLAG_DONE)
488 & ~V4L2_BUF_FLAG_QUEUED;
f7059eaa
JFM		 489 i = (i + 1) % GSPCA_MAX_FRAMES;
490 atomic_set(&gspca_dev->fr_i, i);
63eb9546 491 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
f7059eaa
JFM		 492 PDEBUG(D_FRAM, "frame complete len:%d",
493 frame->v4l2_buf.bytesused);
494 gspca_dev->image = NULL;
495 gspca_dev->image_len = 0;
63eb9546 496 }
63eb9546
JFM		 497}
498EXPORT_SYMBOL(gspca_frame_add);
499
d642de2e
HG		 500static int frame_alloc(struct gspca_dev *gspca_dev, struct file *file,
501 enum v4l2_memory memory, unsigned int count)
63eb9546 502{
d43fa32f
JFM		 503 struct gspca_frame *frame;
504 unsigned int frsz;
505 int i;
63eb9546 506
1966bc2a 507 frsz = gspca_dev->pixfmt.sizeimage;
63eb9546 508 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
63eb9546 509 frsz = PAGE_ALIGN(frsz);
f7059eaa
JFM		 510 if (count >= GSPCA_MAX_FRAMES)
511 count = GSPCA_MAX_FRAMES - 1;
e795d912 512 gspca_dev->frbuf = vmalloc_32(frsz * count);
ac0d6df6 513 if (!gspca_dev->frbuf) {
133a9fe9 514 pr_err("frame alloc failed\n");
ac0d6df6 515 return -ENOMEM;
63eb9546 516 }
d642de2e
HG		 517 gspca_dev->capt_file = file;
518 gspca_dev->memory = memory;
519 gspca_dev->frsz = frsz;
63eb9546
JFM		 520 gspca_dev->nframes = count;
521 for (i = 0; i < count; i++) {
d43fa32f
JFM		 522 frame = &gspca_dev->frame[i];
523 frame->v4l2_buf.index = i;
524 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
c21f0cb4 525 frame->v4l2_buf.flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
d43fa32f
JFM		 526 frame->v4l2_buf.field = V4L2_FIELD_NONE;
527 frame->v4l2_buf.length = frsz;
d642de2e 528 frame->v4l2_buf.memory = memory;
d43fa32f 529 frame->v4l2_buf.sequence = 0;
b192ca98 530 frame->data = gspca_dev->frbuf + i * frsz;
ac0d6df6 531 frame->v4l2_buf.m.offset = i * frsz;
63eb9546 532 }
f7059eaa
JFM		 533 atomic_set(&gspca_dev->fr_q, 0);
534 atomic_set(&gspca_dev->fr_i, 0);
535 gspca_dev->fr_o = 0;
d43fa32f 536 return 0;
63eb9546
JFM		 537}
538
539static void frame_free(struct gspca_dev *gspca_dev)
540{
541 int i;
542
543 PDEBUG(D_STREAM, "frame free");
efab8211 544 if (gspca_dev->frbuf != NULL) {
e795d912 545 vfree(gspca_dev->frbuf);
63eb9546
JFM		 546 gspca_dev->frbuf = NULL;
547 for (i = 0; i < gspca_dev->nframes; i++)
548 gspca_dev->frame[i].data = NULL;
549 }
550 gspca_dev->nframes = 0;
d642de2e
HG		 551 gspca_dev->frsz = 0;
552 gspca_dev->capt_file = NULL;
553 gspca_dev->memory = GSPCA_MEMORY_NO;
63eb9546
JFM		 554}
555
d43fa32f 556static void destroy_urbs(struct gspca_dev *gspca_dev)
63eb9546
JFM		 557{
558 struct urb *urb;
559 unsigned int i;
560
561 PDEBUG(D_STREAM, "kill transfer");
44732819 562 for (i = 0; i < MAX_NURBS; i++) {
4aa0d037 563 urb = gspca_dev->urb[i];
63eb9546 564 if (urb == NULL)
d43fa32f 565 break;
63eb9546 566
4aa0d037 567 gspca_dev->urb[i] = NULL;
090264e5 568 usb_kill_urb(urb);
8b2c3da1
WY		 569 usb_free_coherent(gspca_dev->dev,
570 urb->transfer_buffer_length,
571 urb->transfer_buffer,
572 urb->transfer_dma);
63eb9546
JFM		 573 usb_free_urb(urb);
574 }
63eb9546
JFM		 575}
576
e4dac289
JFM		 577static int gspca_set_alt0(struct gspca_dev *gspca_dev)
578{
579 int ret;
580
581 if (gspca_dev->alt == 0)
582 return 0;
583 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
584 if (ret < 0)
133a9fe9 585 pr_err("set alt 0 err %d\n", ret);
e4dac289
JFM		 586 return ret;
587}
588
589/* Note: both the queue and the usb locks should be held when calling this */
590static void gspca_stream_off(struct gspca_dev *gspca_dev)
591{
592 gspca_dev->streaming = 0;
a3cc74d4 593 gspca_dev->usb_err = 0;
eb238732
HG		 594 if (gspca_dev->sd_desc->stopN)
595 gspca_dev->sd_desc->stopN(gspca_dev);
596 destroy_urbs(gspca_dev);
597 gspca_input_destroy_urb(gspca_dev);
598 gspca_set_alt0(gspca_dev);
599 gspca_input_create_urb(gspca_dev);
e4dac289
JFM		 600 if (gspca_dev->sd_desc->stop0)
601 gspca_dev->sd_desc->stop0(gspca_dev);
602 PDEBUG(D_STREAM, "stream off OK");
603}
604
63eb9546 605/*
2fe15245
AO		 606 * look for an input transfer endpoint in an alternate setting.
607 *
608 * If xfer_ep is invalid, return the first valid ep found, otherwise
609 * look for exactly the ep with address equal to xfer_ep.
63eb9546 610 */
0be01004 611static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
2fe15245 612 int xfer, int xfer_ep)
63eb9546
JFM		 613{
614 struct usb_host_endpoint *ep;
615 int i, attr;
616
63eb9546
JFM		 617 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
618 ep = &alt->endpoint[i];
50e06dee 619 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
30d35e49 620 if (attr == xfer
7106225a 621 && ep->desc.wMaxPacketSize != 0
2fe15245
AO		 622 && usb_endpoint_dir_in(&ep->desc)
623 && (xfer_ep < 0 || ep->desc.bEndpointAddress == xfer_ep))
50e06dee 624 return ep;
63eb9546
JFM		 625 }
626 return NULL;
627}
628
27b12023
JFM		 629/* compute the minimum bandwidth for the current transfer */
630static u32 which_bandwidth(struct gspca_dev *gspca_dev)
631{
632 u32 bandwidth;
27b12023 633
18bef42c 634 /* get the (max) image size */
1966bc2a 635 bandwidth = gspca_dev->pixfmt.sizeimage;
27b12023 636
18bef42c 637 /* if the image is compressed, estimate its mean size */
eb3fb7c9 638 if (!gspca_dev->cam.needs_full_bandwidth &&
1966bc2a
OZ		 639 bandwidth < gspca_dev->pixfmt.width *
640 gspca_dev->pixfmt.height)
18bef42c 641 bandwidth = bandwidth * 3 / 8; /* 0.375 */
27b12023
JFM		 642
643 /* estimate the frame rate */
644 if (gspca_dev->sd_desc->get_streamparm) {
645 struct v4l2_streamparm parm;
646
27b12023
JFM		 647 gspca_dev->sd_desc->get_streamparm(gspca_dev, &parm);
648 bandwidth *= parm.parm.capture.timeperframe.denominator;
1153f04d 649 bandwidth /= parm.parm.capture.timeperframe.numerator;
27b12023 650 } else {
18bef42c
JFM		 651
652 /* don't hope more than 15 fps with USB 1.1 and
653 * image resolution >= 640x480 */
1966bc2a 654 if (gspca_dev->pixfmt.width >= 640
18bef42c
JFM		 655 && gspca_dev->dev->speed == USB_SPEED_FULL)
656 bandwidth *= 15; /* 15 fps */
657 else
658 bandwidth *= 30; /* 30 fps */
27b12023
JFM		 659 }
660
661 PDEBUG(D_STREAM, "min bandwidth: %d", bandwidth);
662 return bandwidth;
663}
664
665/* endpoint table */
666#define MAX_ALT 16
667struct ep_tb_s {
668 u32 alt;
669 u32 bandwidth;
670};
671
63eb9546 672/*
27b12023
JFM		 673 * build the table of the endpoints
674 * and compute the minimum bandwidth for the image transfer
63eb9546 675 */
66957b86 676static int build_isoc_ep_tb(struct gspca_dev *gspca_dev,
27b12023 677 struct usb_interface *intf,
27b12023 678 struct ep_tb_s *ep_tb)
63eb9546 679{
63eb9546 680 struct usb_host_endpoint *ep;
27b12023
JFM		 681 int i, j, nbalt, psize, found;
682 u32 bandwidth, last_bw;
63eb9546 683
27b12023
JFM		 684 nbalt = intf->num_altsetting;
685 if (nbalt > MAX_ALT)
686 nbalt = MAX_ALT; /* fixme: should warn */
687
688 /* build the endpoint table */
689 i = 0;
690 last_bw = 0;
691 for (;;) {
692 ep_tb->bandwidth = 2000 * 2000 * 120;
693 found = 0;
694 for (j = 0; j < nbalt; j++) {
66957b86 695 ep = alt_xfer(&intf->altsetting[j],
2fe15245
AO		 696 USB_ENDPOINT_XFER_ISOC,
697 gspca_dev->xfer_ep);
27b12023
JFM		 698 if (ep == NULL)
699 continue;
d0d3435b
HG		 700 if (ep->desc.bInterval == 0) {
701 pr_err("alt %d iso endp with 0 interval\n", j);
702 continue;
703 }
27b12023 704 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
66957b86 705 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
d0d3435b 706 bandwidth = psize * 1000;
27b12023 707 if (gspca_dev->dev->speed == USB_SPEED_HIGH
8ad2d06f 708 || gspca_dev->dev->speed >= USB_SPEED_SUPER)
27b12023 709 bandwidth *= 8;
d0d3435b 710 bandwidth /= 1 << (ep->desc.bInterval - 1);
27b12023
JFM		 711 if (bandwidth <= last_bw)
712 continue;
713 if (bandwidth < ep_tb->bandwidth) {
714 ep_tb->bandwidth = bandwidth;
715 ep_tb->alt = j;
716 found = 1;
717 }
95d9142c 718 }
27b12023
JFM		 719 if (!found)
720 break;
721 PDEBUG(D_STREAM, "alt %d bandwidth %d",
722 ep_tb->alt, ep_tb->bandwidth);
723 last_bw = ep_tb->bandwidth;
724 i++;
725 ep_tb++;
726 }
727
2d39059a
HG		 728 /*
729 * If the camera:
730 * has a usb audio class interface (a built in usb mic); and
731 * is a usb 1 full speed device; and
732 * uses the max full speed iso bandwidth; and
733 * and has more than 1 alt setting
734 * then skip the highest alt setting to spare bandwidth for the mic
735 */
736 if (gspca_dev->audio &&
737 gspca_dev->dev->speed == USB_SPEED_FULL &&
738 last_bw >= 1000000 &&
739 i > 1) {
740 PDEBUG(D_STREAM, "dev has usb audio, skipping highest alt");
741 i--;
742 ep_tb--;
743 }
744
27b12023
JFM		 745 /* get the requested bandwidth and start at the highest atlsetting */
746 bandwidth = which_bandwidth(gspca_dev);
747 ep_tb--;
748 while (i > 1) {
749 ep_tb--;
750 if (ep_tb->bandwidth < bandwidth)
751 break;
752 i--;
63eb9546 753 }
27b12023 754 return i;
63eb9546
JFM		 755}
756
757/*
0be01004 758 * create the URBs for image transfer
63eb9546
JFM		 759 */
760static int create_urbs(struct gspca_dev *gspca_dev,
761 struct usb_host_endpoint *ep)
762{
763 struct urb *urb;
d43fa32f 764 int n, nurbs, i, psize, npkt, bsize;
63eb9546
JFM		 765
766 /* calculate the packet size and the number of packets */
63eb9546 767 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
d43fa32f 768
6929dc6b 769 if (!gspca_dev->cam.bulk) { /* isoc */
95d9142c
JFM		 770
771 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
1f53b0b0
JFM		 772 if (gspca_dev->pkt_size == 0)
773 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
774 else
775 psize = gspca_dev->pkt_size;
49cb6b04
JFM		 776 npkt = gspca_dev->cam.npkt;
777 if (npkt == 0)
778 npkt = 32; /* default value */
0be01004
JFM		 779 bsize = psize * npkt;
780 PDEBUG(D_STREAM,
781 "isoc %d pkts size %d = bsize:%d",
782 npkt, psize, bsize);
51977a8d 783 nurbs = DEF_NURBS;
95d9142c 784 } else { /* bulk */
0be01004 785 npkt = 0;
dff369aa 786 bsize = gspca_dev->cam.bulk_size;
95d9142c
JFM		 787 if (bsize == 0)
788 bsize = psize;
0be01004 789 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
dff369aa
AO		 790 if (gspca_dev->cam.bulk_nurbs != 0)
791 nurbs = gspca_dev->cam.bulk_nurbs;
792 else
793 nurbs = 1;
0be01004
JFM		 794 }
795
d43fa32f 796 for (n = 0; n < nurbs; n++) {
63eb9546 797 urb = usb_alloc_urb(npkt, GFP_KERNEL);
452b53f7 798 if (!urb)
63eb9546 799 return -ENOMEM;
db870875 800 gspca_dev->urb[n] = urb;
997ea58e 801 urb->transfer_buffer = usb_alloc_coherent(gspca_dev->dev,
63eb9546
JFM		 802 bsize,
803 GFP_KERNEL,
804 &urb->transfer_dma);
805
4aa0d037 806 if (urb->transfer_buffer == NULL) {
133a9fe9 807 pr_err("usb_alloc_coherent failed\n");
63eb9546
JFM		 808 return -ENOMEM;
809 }
63eb9546
JFM		 810 urb->dev = gspca_dev->dev;
811 urb->context = gspca_dev;
63eb9546 812 urb->transfer_buffer_length = bsize;
0be01004
JFM		 813 if (npkt != 0) { /* ISOC */
814 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
815 ep->desc.bEndpointAddress);
6c49da7f
FZ		 816 urb->transfer_flags = URB_ISO_ASAP
817 | URB_NO_TRANSFER_DMA_MAP;
51e23be2 818 urb->interval = 1 << (ep->desc.bInterval - 1);
0be01004
JFM		 819 urb->complete = isoc_irq;
820 urb->number_of_packets = npkt;
821 for (i = 0; i < npkt; i++) {
822 urb->iso_frame_desc[i].length = psize;
823 urb->iso_frame_desc[i].offset = psize * i;
824 }
825 } else { /* bulk */
826 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
a23c1947 827 ep->desc.bEndpointAddress);
6c49da7f 828 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
0be01004 829 urb->complete = bulk_irq;
63eb9546
JFM		 830 }
831 }
832 return 0;
833}
834
835/*
836 * start the USB transfer
837 */
838static int gspca_init_transfer(struct gspca_dev *gspca_dev)
839{
27b12023 840 struct usb_interface *intf;
63eb9546 841 struct usb_host_endpoint *ep;
db870875 842 struct urb *urb;
27b12023
JFM		 843 struct ep_tb_s ep_tb[MAX_ALT];
844 int n, ret, xfer, alt, alt_idx;
63eb9546 845
f7059eaa
JFM		 846 /* reset the streaming variables */
847 gspca_dev->image = NULL;
848 gspca_dev->image_len = 0;
849 gspca_dev->last_packet_type = DISCARD_PACKET;
850 gspca_dev->sequence = 0;
851
ab6c8cf2
JFM		 852 gspca_dev->usb_err = 0;
853
27b12023 854 /* do the specific subdriver stuff before endpoint selection */
47faa6f8
HG		 855 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
856 gspca_dev->alt = gspca_dev->cam.bulk ? intf->num_altsetting : 0;
1f53b0b0
JFM		 857 if (gspca_dev->sd_desc->isoc_init) {
858 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
859 if (ret < 0)
a3d6e8cc 860 return ret;
1f53b0b0 861 }
27b12023
JFM		 862 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
863 : USB_ENDPOINT_XFER_ISOC;
314b3e08 864
66957b86 865 /* if bulk or the subdriver forced an altsetting, get the endpoint */
27b12023
JFM		 866 if (gspca_dev->alt != 0) {
867 gspca_dev->alt--; /* (previous version compatibility) */
2fe15245
AO		 868 ep = alt_xfer(&intf->altsetting[gspca_dev->alt], xfer,
869 gspca_dev->xfer_ep);
27b12023
JFM		 870 if (ep == NULL) {
871 pr_err("bad altsetting %d\n", gspca_dev->alt);
a3d6e8cc 872 return -EIO;
27b12023
JFM		 873 }
874 ep_tb[0].alt = gspca_dev->alt;
875 alt_idx = 1;
876 } else {
59234e59
AO		 877 /* else, compute the minimum bandwidth
878 * and build the endpoint table */
66957b86 879 alt_idx = build_isoc_ep_tb(gspca_dev, intf, ep_tb);
27b12023
JFM		 880 if (alt_idx <= 0) {
881 pr_err("no transfer endpoint found\n");
a3d6e8cc 882 return -EIO;
27b12023 883 }
1f53b0b0 884 }
27b12023
JFM		 885
886 /* set the highest alternate setting and
887 * loop until urb submit succeeds */
888 gspca_input_destroy_urb(gspca_dev);
889
890 gspca_dev->alt = ep_tb[--alt_idx].alt;
891 alt = -1;
63eb9546 892 for (;;) {
27b12023
JFM		 893 if (alt != gspca_dev->alt) {
894 alt = gspca_dev->alt;
6121ca57 895 if (intf->num_altsetting > 1) {
27b12023
JFM		 896 ret = usb_set_interface(gspca_dev->dev,
897 gspca_dev->iface,
898 alt);
899 if (ret < 0) {
4274d84c
JFM		 900 if (ret == -ENOSPC)
901 goto retry; /*fixme: ugly*/
27b12023
JFM		 902 pr_err("set alt %d err %d\n", alt, ret);
903 goto out;
904 }
905 }
906 }
47aaca96 907 if (!gspca_dev->cam.no_urb_create) {
27b12023
JFM		 908 PDEBUG(D_STREAM, "init transfer alt %d", alt);
909 ret = create_urbs(gspca_dev,
2fe15245
AO		 910 alt_xfer(&intf->altsetting[alt], xfer,
911 gspca_dev->xfer_ep));
47aaca96
JFM		 912 if (ret < 0) {
913 destroy_urbs(gspca_dev);
914 goto out;
915 }
db870875 916 }
63eb9546 917
8fe2f1d5 918 /* clear the bulk endpoint */
6929dc6b 919 if (gspca_dev->cam.bulk)
8fe2f1d5 920 usb_clear_halt(gspca_dev->dev,
50e06dee 921 gspca_dev->urb[0]->pipe);
8fe2f1d5 922
63eb9546 923 /* start the cam */
72ab97ce
JFM		 924 ret = gspca_dev->sd_desc->start(gspca_dev);
925 if (ret < 0) {
926 destroy_urbs(gspca_dev);
927 goto out;
928 }
63eb9546 929 gspca_dev->streaming = 1;
82b343b2 930 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
63eb9546 931
dff369aa 932 /* some bulk transfers are started by the subdriver */
6929dc6b 933 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
51977a8d
JFM		 934 break;
935
63eb9546 936 /* submit the URBs */
db870875
JFM		 937 for (n = 0; n < MAX_NURBS; n++) {
938 urb = gspca_dev->urb[n];
939 if (urb == NULL)
940 break;
941 ret = usb_submit_urb(urb, GFP_KERNEL);
1f53b0b0
JFM		 942 if (ret < 0)
943 break;
63eb9546
JFM		 944 }
945 if (ret >= 0)
27b12023
JFM		 946 break; /* transfer is started */
947
948 /* something when wrong
949 * stop the webcam and free the transfer resources */
e4dac289 950 gspca_stream_off(gspca_dev);
4bdf4a83 951 if (ret != -ENOSPC) {
133a9fe9
JP		 952 pr_err("usb_submit_urb alt %d err %d\n",
953 gspca_dev->alt, ret);
1f53b0b0 954 goto out;
4bdf4a83 955 }
1f53b0b0
JFM		 956
957 /* the bandwidth is not wide enough
25985edc 958 * negotiate or try a lower alternate setting */
4274d84c 959retry:
c93396e1 960 PERR("alt %d - bandwidth not wide enough, trying again", alt);
1f53b0b0
JFM		 961 msleep(20); /* wait for kill complete */
962 if (gspca_dev->sd_desc->isoc_nego) {
963 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
964 if (ret < 0)
965 goto out;
966 } else {
27b12023
JFM		 967 if (alt_idx <= 0) {
968 pr_err("no transfer endpoint found\n");
1f53b0b0
JFM		 969 ret = -EIO;
970 goto out;
971 }
ac97ecc8 972 gspca_dev->alt = ep_tb[--alt_idx].alt;
1f53b0b0 973 }
63eb9546
JFM		 974 }
975out:
314b3e08 976 gspca_input_create_urb(gspca_dev);
63eb9546
JFM		 977 return ret;
978}
979
d43fa32f 980static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
63eb9546
JFM		 981{
982 int i;
983
984 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
985 gspca_dev->curr_mode = i;
1966bc2a 986 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i];
6a33091f 987
62bba5dd
HV		 988 /* does nothing if ctrl_handler == NULL */
989 v4l2_ctrl_handler_setup(gspca_dev->vdev.ctrl_handler);
63eb9546
JFM		 990}
991
b3f18ec6
AO		 992static int wxh_to_mode(struct gspca_dev *gspca_dev,
993 int width, int height)
994{
995 int i;
996
997 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
998 if (width == gspca_dev->cam.cam_mode[i].width
999 && height == gspca_dev->cam.cam_mode[i].height)
1000 return i;
1001 }
1002 return -EINVAL;
1003}
1004
9a08e461 1005static int wxh_to_nearest_mode(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1006 int width, int height)
1007{
1008 int i;
1009
d43fa32f
JFM		 1010 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
1011 if (width >= gspca_dev->cam.cam_mode[i].width
1012 && height >= gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 1013 break;
1014 }
63eb9546
JFM		 1015 return i;
1016}
1017
63eb9546
JFM		 1018/*
1019 * search a mode with the right pixel format
1020 */
1021static int gspca_get_mode(struct gspca_dev *gspca_dev,
1022 int mode,
1023 int pixfmt)
1024{
1025 int modeU, modeD;
1026
1027 modeU = modeD = mode;
1028 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
1029 if (--modeD >= 0) {
c2446b3e
JFM		 1030 if (gspca_dev->cam.cam_mode[modeD].pixelformat
1031 == pixfmt)
63eb9546
JFM		 1032 return modeD;
1033 }
1034 if (++modeU < gspca_dev->cam.nmodes) {
c2446b3e
JFM		 1035 if (gspca_dev->cam.cam_mode[modeU].pixelformat
1036 == pixfmt)
63eb9546
JFM		 1037 return modeU;
1038 }
1039 }
1040 return -EINVAL;
1041}
1042
af1d9afa 1043#ifdef CONFIG_VIDEO_ADV_DEBUG
b1c85cc0
HV		 1044static int vidioc_g_chip_info(struct file *file, void *priv,
1045 struct v4l2_dbg_chip_info *chip)
af1d9afa 1046{
f4c1605a 1047 struct gspca_dev *gspca_dev = video_drvdata(file);
af1d9afa 1048
8c4ebae4 1049 gspca_dev->usb_err = 0;
b1c85cc0
HV		 1050 if (gspca_dev->sd_desc->get_chip_info)
1051 return gspca_dev->sd_desc->get_chip_info(gspca_dev, chip);
1052 return chip->match.addr ? -EINVAL : 0;
af1d9afa
BJ		 1053}
1054
b1c85cc0
HV		 1055static int vidioc_g_register(struct file *file, void *priv,
1056 struct v4l2_dbg_register *reg)
af1d9afa 1057{
f4c1605a 1058 struct gspca_dev *gspca_dev = video_drvdata(file);
af1d9afa 1059
8c4ebae4 1060 gspca_dev->usb_err = 0;
b1c85cc0 1061 return gspca_dev->sd_desc->get_register(gspca_dev, reg);
af1d9afa 1062}
af1d9afa 1063
b1c85cc0
HV		 1064static int vidioc_s_register(struct file *file, void *priv,
1065 const struct v4l2_dbg_register *reg)
af1d9afa 1066{
f4c1605a 1067 struct gspca_dev *gspca_dev = video_drvdata(file);
af1d9afa 1068
8c4ebae4 1069 gspca_dev->usb_err = 0;
b1c85cc0 1070 return gspca_dev->sd_desc->set_register(gspca_dev, reg);
af1d9afa 1071}
b1c85cc0 1072#endif
af1d9afa 1073
e078770a 1074static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1075 struct v4l2_fmtdesc *fmtdesc)
1076{
f4c1605a 1077 struct gspca_dev *gspca_dev = video_drvdata(file);
6a7eba24 1078 int i, j, index;
63eb9546
JFM		 1079 __u32 fmt_tb[8];
1080
63eb9546
JFM		 1081 /* give an index to each format */
1082 index = 0;
1083 j = 0;
1084 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
c2446b3e 1085 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
63eb9546
JFM		 1086 j = 0;
1087 for (;;) {
1088 if (fmt_tb[j] == fmt_tb[index])
1089 break;
1090 j++;
1091 }
1092 if (j == index) {
1093 if (fmtdesc->index == index)
1094 break; /* new format */
1095 index++;
80297125 1096 if (index >= ARRAY_SIZE(fmt_tb))
63eb9546
JFM		 1097 return -EINVAL;
1098 }
1099 }
1100 if (i < 0)
1101 return -EINVAL; /* no more format */
1102
63eb9546 1103 fmtdesc->pixelformat = fmt_tb[index];
b796fb6e
JFM		 1104 if (gspca_dev->cam.cam_mode[i].sizeimage <
1105 gspca_dev->cam.cam_mode[i].width *
1106 gspca_dev->cam.cam_mode[i].height)
63eb9546
JFM		 1107 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1108 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1109 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1110 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1111 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1112 fmtdesc->description[4] = '\0';
1113 return 0;
1114}
1115
e078770a 1116static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1117 struct v4l2_format *fmt)
1118{
f4c1605a 1119 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546 1120
1966bc2a 1121 fmt->fmt.pix = gspca_dev->pixfmt;
d52e2381
LP		 1122 /* some drivers use priv internally, zero it before giving it back to
1123 the core */
ac3322b0 1124 fmt->fmt.pix.priv = 0;
63eb9546
JFM		 1125 return 0;
1126}
1127
e078770a 1128static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
63eb9546
JFM		 1129 struct v4l2_format *fmt)
1130{
24c530b4 1131 int w, h, mode, mode2;
63eb9546 1132
4aa0d037
JFM		 1133 w = fmt->fmt.pix.width;
1134 h = fmt->fmt.pix.height;
d43fa32f 1135
c93396e1
TK		 1136 PDEBUG_MODE(gspca_dev, D_CONF, "try fmt cap",
1137 fmt->fmt.pix.pixelformat, w, h);
1138
9a08e461
AO		 1139 /* search the nearest mode for width and height */
1140 mode = wxh_to_nearest_mode(gspca_dev, w, h);
63eb9546
JFM		 1141
1142 /* OK if right palette */
c2446b3e
JFM		 1143 if (gspca_dev->cam.cam_mode[mode].pixelformat
1144 != fmt->fmt.pix.pixelformat) {
63eb9546
JFM		 1145
1146 /* else, search the closest mode with the same pixel format */
1147 mode2 = gspca_get_mode(gspca_dev, mode,
1148 fmt->fmt.pix.pixelformat);
c2446b3e 1149 if (mode2 >= 0)
63eb9546 1150 mode = mode2;
63eb9546 1151 }
ac3322b0 1152 fmt->fmt.pix = gspca_dev->cam.cam_mode[mode];
7d687af4
OZ		 1153 if (gspca_dev->sd_desc->try_fmt) {
1154 /* pass original resolution to subdriver try_fmt */
1155 fmt->fmt.pix.width = w;
1156 fmt->fmt.pix.height = h;
1157 gspca_dev->sd_desc->try_fmt(gspca_dev, fmt);
1158 }
d52e2381
LP		 1159 /* some drivers use priv internally, zero it before giving it back to
1160 the core */
ac3322b0 1161 fmt->fmt.pix.priv = 0;
63eb9546
JFM		 1162 return mode; /* used when s_fmt */
1163}
1164
e078770a 1165static int vidioc_try_fmt_vid_cap(struct file *file,
63eb9546
JFM		 1166 void *priv,
1167 struct v4l2_format *fmt)
1168{
f4c1605a 1169 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1170 int ret;
1171
e078770a 1172 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1173 if (ret < 0)
1174 return ret;
1175 return 0;
1176}
1177
e078770a 1178static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
63eb9546
JFM		 1179 struct v4l2_format *fmt)
1180{
f4c1605a 1181 struct gspca_dev *gspca_dev = video_drvdata(file);
d43fa32f 1182 int ret;
63eb9546 1183
e2997a72
HG		 1184 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1185 return -ERESTARTSYS;
d43fa32f 1186
e078770a 1187 ret = try_fmt_vid_cap(gspca_dev, fmt);
63eb9546
JFM		 1188 if (ret < 0)
1189 goto out;
1190
d43fa32f
JFM		 1191 if (gspca_dev->nframes != 0
1192 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1193 ret = -EINVAL;
1194 goto out;
1195 }
1196
d43fa32f
JFM		 1197 if (gspca_dev->streaming) {
1198 ret = -EBUSY;
1199 goto out;
e2997a72 1200 }
63eb9546 1201 gspca_dev->curr_mode = ret;
7d687af4
OZ		 1202 if (gspca_dev->sd_desc->try_fmt)
1203 /* subdriver try_fmt can modify format parameters */
1204 gspca_dev->pixfmt = fmt->fmt.pix;
1205 else
1206 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[ret];
d43fa32f 1207
d43fa32f 1208 ret = 0;
63eb9546
JFM		 1209out:
1210 mutex_unlock(&gspca_dev->queue_lock);
1211 return ret;
1212}
1213
11c635a2
HG		 1214static int vidioc_enum_framesizes(struct file *file, void *priv,
1215 struct v4l2_frmsizeenum *fsize)
1216{
f4c1605a 1217 struct gspca_dev *gspca_dev = video_drvdata(file);
11c635a2
HG		 1218 int i;
1219 __u32 index = 0;
1220
7d687af4
OZ		 1221 if (gspca_dev->sd_desc->enum_framesizes)
1222 return gspca_dev->sd_desc->enum_framesizes(gspca_dev, fsize);
1223
11c635a2
HG		 1224 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1225 if (fsize->pixel_format !=
1226 gspca_dev->cam.cam_mode[i].pixelformat)
1227 continue;
1228
1229 if (fsize->index == index) {
1230 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1231 fsize->discrete.width =
1232 gspca_dev->cam.cam_mode[i].width;
1233 fsize->discrete.height =
1234 gspca_dev->cam.cam_mode[i].height;
1235 return 0;
1236 }
1237 index++;
1238 }
1239
1240 return -EINVAL;
1241}
1242
28ffe77f
AO		 1243static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1244 struct v4l2_frmivalenum *fival)
1245{
f4c1605a 1246 struct gspca_dev *gspca_dev = video_drvdata(filp);
b3f18ec6 1247 int mode;
28ffe77f
AO		 1248 __u32 i;
1249
b3f18ec6
AO		 1250 mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1251 if (mode < 0)
1252 return -EINVAL;
1253
28ffe77f
AO		 1254 if (gspca_dev->cam.mode_framerates == NULL ||
1255 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1256 return -EINVAL;
1257
1258 if (fival->pixel_format !=
1259 gspca_dev->cam.cam_mode[mode].pixelformat)
1260 return -EINVAL;
1261
1262 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1263 if (fival->index == i) {
c0925ba3 1264 fival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
28ffe77f
AO		 1265 fival->discrete.numerator = 1;
1266 fival->discrete.denominator =
1267 gspca_dev->cam.mode_framerates[mode].rates[i];
1268 return 0;
1269 }
1270 }
1271
1272 return -EINVAL;
1273}
1274
a3d6e8cc 1275static void gspca_release(struct v4l2_device *v4l2_device)
6b060ffe 1276{
a3d6e8cc
HV		 1277 struct gspca_dev *gspca_dev =
1278 container_of(v4l2_device, struct gspca_dev, v4l2_dev);
6b060ffe 1279
62bba5dd 1280 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
2333565d 1281 v4l2_device_unregister(&gspca_dev->v4l2_dev);
6b060ffe
FZ		 1282 kfree(gspca_dev->usb_buf);
1283 kfree(gspca_dev);
1284}
1285
bec43661 1286static int dev_open(struct file *file)
63eb9546 1287{
f4c1605a 1288 struct gspca_dev *gspca_dev = video_drvdata(file);
b563a0d0 1289 int ret;
63eb9546 1290
0d07e240 1291 PDEBUG(D_STREAM, "[%s] open", current->comm);
5c4fa002
JFM		 1292
1293 /* protect the subdriver against rmmod */
7f6eb118
HG		 1294 if (!try_module_get(gspca_dev->module))
1295 return -ENODEV;
6b060ffe 1296
b563a0d0
AK		 1297 ret = v4l2_fh_open(file);
1298 if (ret)
1299 module_put(gspca_dev->module);
1300 return ret;
63eb9546
JFM		 1301}
1302
bec43661 1303static int dev_close(struct file *file)
63eb9546 1304{
f4c1605a 1305 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546 1306
0d07e240 1307 PDEBUG(D_STREAM, "[%s] close", current->comm);
a3d6e8cc
HV		 1308
1309 /* Needed for gspca_stream_off, always lock before queue_lock! */
1310 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
e2997a72 1311 return -ERESTARTSYS;
e2997a72 1312
a3d6e8cc
HV		 1313 if (mutex_lock_interruptible(&gspca_dev->queue_lock)) {
1314 mutex_unlock(&gspca_dev->usb_lock);
1315 return -ERESTARTSYS;
1316 }
1317
5b77ae77 1318 /* if the file did the capture, free the streaming resources */
4aa0d037 1319 if (gspca_dev->capt_file == file) {
a3cc74d4 1320 if (gspca_dev->streaming)
a1e8288b 1321 gspca_stream_off(gspca_dev);
4aa0d037 1322 frame_free(gspca_dev);
4aa0d037 1323 }
5c4fa002 1324 module_put(gspca_dev->module);
63eb9546 1325 mutex_unlock(&gspca_dev->queue_lock);
a3d6e8cc 1326 mutex_unlock(&gspca_dev->usb_lock);
6b060ffe 1327
d43fa32f 1328 PDEBUG(D_STREAM, "close done");
6b060ffe 1329
2333565d 1330 return v4l2_fh_release(file);
63eb9546
JFM		 1331}
1332
1333static int vidioc_querycap(struct file *file, void *priv,
1334 struct v4l2_capability *cap)
1335{
f4c1605a 1336 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546 1337
e7d712cc 1338 strlcpy((char *) cap->driver, gspca_dev->sd_desc->name,
d8518590 1339 sizeof cap->driver);
c6edaf16 1340 if (gspca_dev->dev->product != NULL) {
e7d712cc 1341 strlcpy((char *) cap->card, gspca_dev->dev->product,
c6edaf16
JFM		 1342 sizeof cap->card);
1343 } else {
d8518590 1344 snprintf((char *) cap->card, sizeof cap->card,
c6edaf16
JFM		 1345 "USB Camera (%04x:%04x)",
1346 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1347 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1348 }
d8518590
JFM		 1349 usb_make_path(gspca_dev->dev, (char *) cap->bus_info,
1350 sizeof(cap->bus_info));
cc7b6f25 1351 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE
63eb9546
JFM		 1352 | V4L2_CAP_STREAMING
1353 | V4L2_CAP_READWRITE;
cc7b6f25 1354 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
a3d6e8cc 1355 return 0;
63eb9546
JFM		 1356}
1357
63eb9546
JFM		 1358static int vidioc_enum_input(struct file *file, void *priv,
1359 struct v4l2_input *input)
1360{
f4c1605a 1361 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1362
1363 if (input->index != 0)
1364 return -EINVAL;
63eb9546 1365 input->type = V4L2_INPUT_TYPE_CAMERA;
dfa76fa2 1366 input->status = gspca_dev->cam.input_flags;
e7d712cc 1367 strlcpy(input->name, gspca_dev->sd_desc->name,
63eb9546
JFM		 1368 sizeof input->name);
1369 return 0;
1370}
1371
1372static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1373{
1374 *i = 0;
1375 return 0;
1376}
1377
1378static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1379{
1380 if (i > 0)
1381 return -EINVAL;
1382 return (0);
1383}
1384
1385static int vidioc_reqbufs(struct file *file, void *priv,
1386 struct v4l2_requestbuffers *rb)
1387{
f4c1605a 1388 struct gspca_dev *gspca_dev = video_drvdata(file);
832d0a91 1389 int i, ret = 0, streaming;
63eb9546 1390
a2ba6f27
JFM		 1391 i = rb->memory; /* (avoid compilation warning) */
1392 switch (i) {
5b77ae77 1393 case GSPCA_MEMORY_READ: /* (internal call) */
d43fa32f 1394 case V4L2_MEMORY_MMAP:
d43fa32f 1395 case V4L2_MEMORY_USERPTR:
6a7eba24 1396 break;
d43fa32f 1397 default:
63eb9546 1398 return -EINVAL;
d43fa32f 1399 }
e2997a72
HG		 1400 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1401 return -ERESTARTSYS;
d43fa32f 1402
5b77ae77 1403 if (gspca_dev->memory != GSPCA_MEMORY_NO
ce5610bc 1404 && gspca_dev->memory != GSPCA_MEMORY_READ
5b77ae77 1405 && gspca_dev->memory != rb->memory) {
4aa0d037
JFM		 1406 ret = -EBUSY;
1407 goto out;
1408 }
d43fa32f 1409
5b77ae77
JFM		 1410 /* only one file may do the capture */
1411 if (gspca_dev->capt_file != NULL
1412 && gspca_dev->capt_file != file) {
1413 ret = -EBUSY;
1414 goto out;
1415 }
1416
1417 /* if allocated, the buffers must not be mapped */
1418 for (i = 0; i < gspca_dev->nframes; i++) {
1419 if (gspca_dev->frame[i].vma_use_count) {
ac0d6df6
JFM		 1420 ret = -EBUSY;
1421 goto out;
1422 }
5b77ae77
JFM		 1423 }
1424
1425 /* stop streaming */
832d0a91
JFM		 1426 streaming = gspca_dev->streaming;
1427 if (streaming) {
5b77ae77 1428 gspca_stream_off(gspca_dev);
59929cef
JFM		 1429
1430 /* Don't restart the stream when switching from read
1431 * to mmap mode */
1432 if (gspca_dev->memory == GSPCA_MEMORY_READ)
1433 streaming = 0;
5b77ae77
JFM		 1434 }
1435
1436 /* free the previous allocated buffers, if any */
d642de2e 1437 if (gspca_dev->nframes != 0)
5b77ae77 1438 frame_free(gspca_dev);
5b77ae77
JFM		 1439 if (rb->count == 0) /* unrequest */
1440 goto out;
d642de2e 1441 ret = frame_alloc(gspca_dev, file, rb->memory, rb->count);
5b77ae77
JFM		 1442 if (ret == 0) {
1443 rb->count = gspca_dev->nframes;
832d0a91
JFM		 1444 if (streaming)
1445 ret = gspca_init_transfer(gspca_dev);
4aa0d037
JFM		 1446 }
1447out:
63eb9546
JFM		 1448 mutex_unlock(&gspca_dev->queue_lock);
1449 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1450 return ret;
1451}
1452
1453static int vidioc_querybuf(struct file *file, void *priv,
1454 struct v4l2_buffer *v4l2_buf)
1455{
f4c1605a 1456 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1457 struct gspca_frame *frame;
1458
3a70c3fb 1459 if (v4l2_buf->index >= gspca_dev->nframes)
63eb9546
JFM		 1460 return -EINVAL;
1461
1462 frame = &gspca_dev->frame[v4l2_buf->index];
1463 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1464 return 0;
1465}
1466
1467static int vidioc_streamon(struct file *file, void *priv,
1468 enum v4l2_buf_type buf_type)
1469{
f4c1605a 1470 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1471 int ret;
1472
63eb9546
JFM		 1473 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1474 return -EINVAL;
e2997a72
HG		 1475 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1476 return -ERESTARTSYS;
090264e5 1477
18bf99aa
JFM		 1478 /* check the capture file */
1479 if (gspca_dev->capt_file != file) {
1480 ret = -EBUSY;
1481 goto out;
1482 }
1483
1edabe71
JFM		 1484 if (gspca_dev->nframes == 0
1485 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
63eb9546
JFM		 1486 ret = -EINVAL;
1487 goto out;
1488 }
1489 if (!gspca_dev->streaming) {
1490 ret = gspca_init_transfer(gspca_dev);
1491 if (ret < 0)
1492 goto out;
1493 }
1966bc2a
OZ		 1494 PDEBUG_MODE(gspca_dev, D_STREAM, "stream on OK",
1495 gspca_dev->pixfmt.pixelformat,
1496 gspca_dev->pixfmt.width, gspca_dev->pixfmt.height);
e2997a72 1497 ret = 0;
63eb9546
JFM		 1498out:
1499 mutex_unlock(&gspca_dev->queue_lock);
1500 return ret;
1501}
1502
1503static int vidioc_streamoff(struct file *file, void *priv,
1504 enum v4l2_buf_type buf_type)
1505{
f4c1605a 1506 struct gspca_dev *gspca_dev = video_drvdata(file);
af05ef01 1507 int i, ret;
63eb9546 1508
63eb9546
JFM		 1509 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1510 return -EINVAL;
4e770f76 1511
4aa0d037
JFM		 1512 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1513 return -ERESTARTSYS;
5b77ae77 1514
4e770f76
HG		 1515 if (!gspca_dev->streaming) {
1516 ret = 0;
1517 goto out;
1518 }
1519
18bf99aa
JFM		 1520 /* check the capture file */
1521 if (gspca_dev->capt_file != file) {
1522 ret = -EBUSY;
1523 goto out;
1524 }
1525
5b77ae77 1526 /* stop streaming */
4aa0d037 1527 gspca_stream_off(gspca_dev);
0d0ae15d
HG		 1528 /* In case another thread is waiting in dqbuf */
1529 wake_up_interruptible(&gspca_dev->wq);
5b77ae77 1530
f7059eaa 1531 /* empty the transfer queues */
af05ef01
HG		 1532 for (i = 0; i < gspca_dev->nframes; i++)
1533 gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
f7059eaa
JFM		 1534 atomic_set(&gspca_dev->fr_q, 0);
1535 atomic_set(&gspca_dev->fr_i, 0);
1536 gspca_dev->fr_o = 0;
5b77ae77 1537 ret = 0;
4aa0d037
JFM		 1538out:
1539 mutex_unlock(&gspca_dev->queue_lock);
1540 return ret;
63eb9546
JFM		 1541}
1542
1543static int vidioc_g_jpegcomp(struct file *file, void *priv,
1544 struct v4l2_jpegcompression *jpegcomp)
1545{
f4c1605a 1546 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546 1547
8c4ebae4 1548 gspca_dev->usb_err = 0;
a3d6e8cc 1549 return gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
63eb9546
JFM		 1550}
1551
1552static int vidioc_s_jpegcomp(struct file *file, void *priv,
d88aab53 1553 const struct v4l2_jpegcompression *jpegcomp)
63eb9546 1554{
f4c1605a 1555 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546 1556
8c4ebae4 1557 gspca_dev->usb_err = 0;
a3d6e8cc 1558 return gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
63eb9546
JFM		 1559}
1560
1561static int vidioc_g_parm(struct file *filp, void *priv,
1562 struct v4l2_streamparm *parm)
1563{
f4c1605a 1564 struct gspca_dev *gspca_dev = video_drvdata(filp);
63eb9546 1565
63eb9546 1566 parm->parm.capture.readbuffers = gspca_dev->nbufread;
627a5ef7
JP		 1567
1568 if (gspca_dev->sd_desc->get_streamparm) {
a3d6e8cc
HV		 1569 gspca_dev->usb_err = 0;
1570 gspca_dev->sd_desc->get_streamparm(gspca_dev, parm);
1571 return gspca_dev->usb_err;
627a5ef7 1572 }
63eb9546
JFM		 1573 return 0;
1574}
1575
1576static int vidioc_s_parm(struct file *filp, void *priv,
1577 struct v4l2_streamparm *parm)
1578{
f4c1605a 1579 struct gspca_dev *gspca_dev = video_drvdata(filp);
c7e5a726 1580 unsigned int n;
63eb9546 1581
63eb9546 1582 n = parm->parm.capture.readbuffers;
f7059eaa 1583 if (n == 0 || n >= GSPCA_MAX_FRAMES)
63eb9546
JFM		 1584 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1585 else
1586 gspca_dev->nbufread = n;
627a5ef7
JP		 1587
1588 if (gspca_dev->sd_desc->set_streamparm) {
a3d6e8cc
HV		 1589 gspca_dev->usb_err = 0;
1590 gspca_dev->sd_desc->set_streamparm(gspca_dev, parm);
1591 return gspca_dev->usb_err;
627a5ef7
JP		 1592 }
1593
63eb9546
JFM		 1594 return 0;
1595}
1596
63eb9546
JFM		 1597static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1598{
f4c1605a 1599 struct gspca_dev *gspca_dev = video_drvdata(file);
efab8211 1600 struct gspca_frame *frame;
63eb9546
JFM		 1601 struct page *page;
1602 unsigned long addr, start, size;
1603 int i, ret;
63eb9546
JFM		 1604
1605 start = vma->vm_start;
1606 size = vma->vm_end - vma->vm_start;
1607 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1608
e2997a72
HG		 1609 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1610 return -ERESTARTSYS;
4aa0d037
JFM		 1611 if (gspca_dev->capt_file != file) {
1612 ret = -EINVAL;
1613 goto out;
63eb9546
JFM		 1614 }
1615
efab8211 1616 frame = NULL;
63eb9546
JFM		 1617 for (i = 0; i < gspca_dev->nframes; ++i) {
1618 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1619 PDEBUG(D_STREAM, "mmap bad memory type");
1620 break;
1621 }
1622 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1623 == vma->vm_pgoff) {
1624 frame = &gspca_dev->frame[i];
1625 break;
1626 }
1627 }
efab8211 1628 if (frame == NULL) {
63eb9546
JFM		 1629 PDEBUG(D_STREAM, "mmap no frame buffer found");
1630 ret = -EINVAL;
4aa0d037 1631 goto out;
63eb9546 1632 }
38bff697 1633 if (size != frame->v4l2_buf.length) {
63eb9546
JFM		 1634 PDEBUG(D_STREAM, "mmap bad size");
1635 ret = -EINVAL;
4aa0d037 1636 goto out;
63eb9546
JFM		 1637 }
1638
1639 /*
1640 * - VM_IO marks the area as being a mmaped region for I/O to a
1641 * device. It also prevents the region from being core dumped.
1642 */
1643 vma->vm_flags |= VM_IO;
1644
1645 addr = (unsigned long) frame->data;
1646 while (size > 0) {
1647 page = vmalloc_to_page((void *) addr);
1648 ret = vm_insert_page(vma, start, page);
1649 if (ret < 0)
4aa0d037 1650 goto out;
63eb9546
JFM		 1651 start += PAGE_SIZE;
1652 addr += PAGE_SIZE;
1653 size -= PAGE_SIZE;
1654 }
1655
d50e257e 1656 vma->vm_ops = &gspca_vm_ops;
63eb9546
JFM		 1657 vma->vm_private_data = frame;
1658 gspca_vm_open(vma);
e2997a72 1659 ret = 0;
4aa0d037 1660out:
63eb9546
JFM		 1661 mutex_unlock(&gspca_dev->queue_lock);
1662 return ret;
1663}
1664
27074efa
HG		 1665static int frame_ready_nolock(struct gspca_dev *gspca_dev, struct file *file,
1666 enum v4l2_memory memory)
1667{
1668 if (!gspca_dev->present)
1669 return -ENODEV;
1670 if (gspca_dev->capt_file != file || gspca_dev->memory != memory ||
1671 !gspca_dev->streaming)
1672 return -EINVAL;
1673
1674 /* check if a frame is ready */
1675 return gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i);
1676}
1677
1678static int frame_ready(struct gspca_dev *gspca_dev, struct file *file,
1679 enum v4l2_memory memory)
1680{
1681 int ret;
1682
1683 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1684 return -ERESTARTSYS;
1685 ret = frame_ready_nolock(gspca_dev, file, memory);
1686 mutex_unlock(&gspca_dev->queue_lock);
1687 return ret;
1688}
1689
63eb9546 1690/*
27074efa 1691 * dequeue a video buffer
63eb9546 1692 *
27074efa 1693 * If nonblock_ing is false, block until a buffer is available.
63eb9546 1694 */
27074efa
HG		 1695static int vidioc_dqbuf(struct file *file, void *priv,
1696 struct v4l2_buffer *v4l2_buf)
63eb9546 1697{
f4c1605a 1698 struct gspca_dev *gspca_dev = video_drvdata(file);
27074efa
HG		 1699 struct gspca_frame *frame;
1700 int i, j, ret;
63eb9546 1701
27074efa
HG		 1702 PDEBUG(D_FRAM, "dqbuf");
1703
1704 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1705 return -ERESTARTSYS;
1706
1707 for (;;) {
1708 ret = frame_ready_nolock(gspca_dev, file, v4l2_buf->memory);
1709 if (ret < 0)
1710 goto out;
1711 if (ret > 0)
1712 break;
1713
1714 mutex_unlock(&gspca_dev->queue_lock);
1715
1716 if (file->f_flags & O_NONBLOCK)
181b704f
HG		 1717 return -EAGAIN;
1718
1719 /* wait till a frame is ready */
4aa0d037 1720 ret = wait_event_interruptible_timeout(gspca_dev->wq,
27074efa 1721 frame_ready(gspca_dev, file, v4l2_buf->memory),
181b704f
HG		 1722 msecs_to_jiffies(3000));
1723 if (ret < 0)
1724 return ret;
27074efa 1725 if (ret == 0)
e2997a72 1726 return -EIO;
27074efa
HG		 1727
1728 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1729 return -ERESTARTSYS;
63eb9546 1730 }
181b704f 1731
27074efa
HG		 1732 i = gspca_dev->fr_o;
1733 j = gspca_dev->fr_queue[i];
1734 frame = &gspca_dev->frame[j];
1735
f7059eaa 1736 gspca_dev->fr_o = (i + 1) % GSPCA_MAX_FRAMES;
e2997a72 1737
4a82bc60
HG		 1738 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1739 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1740 PDEBUG(D_FRAM, "dqbuf %d", j);
1741 ret = 0;
1742
ac0d6df6 1743 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
c6eb8eaf 1744 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
ac0d6df6
JFM		 1745 frame->data,
1746 frame->v4l2_buf.bytesused)) {
c93396e1 1747 PERR("dqbuf cp to user failed");
ac0d6df6 1748 ret = -EFAULT;
ac0d6df6
JFM		 1749 }
1750 }
4aa0d037 1751out:
27074efa 1752 mutex_unlock(&gspca_dev->queue_lock);
a3d6e8cc
HV		 1753
1754 if (ret == 0 && gspca_dev->sd_desc->dq_callback) {
1755 mutex_lock(&gspca_dev->usb_lock);
1756 gspca_dev->usb_err = 0;
1757 if (gspca_dev->present)
1758 gspca_dev->sd_desc->dq_callback(gspca_dev);
1759 mutex_unlock(&gspca_dev->usb_lock);
1760 }
1761
63eb9546
JFM		 1762 return ret;
1763}
1764
1765/*
1766 * queue a video buffer
1767 *
1768 * Attempting to queue a buffer that has already been
1769 * queued will return -EINVAL.
1770 */
1771static int vidioc_qbuf(struct file *file, void *priv,
1772 struct v4l2_buffer *v4l2_buf)
1773{
f4c1605a 1774 struct gspca_dev *gspca_dev = video_drvdata(file);
63eb9546
JFM		 1775 struct gspca_frame *frame;
1776 int i, index, ret;
1777
1778 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
63eb9546 1779
5b77ae77
JFM		 1780 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1781 return -ERESTARTSYS;
1782
63eb9546
JFM		 1783 index = v4l2_buf->index;
1784 if ((unsigned) index >= gspca_dev->nframes) {
d43fa32f 1785 PDEBUG(D_FRAM,
63eb9546 1786 "qbuf idx %d >= %d", index, gspca_dev->nframes);
5b77ae77
JFM		 1787 ret = -EINVAL;
1788 goto out;
63eb9546 1789 }
5b77ae77 1790 if (v4l2_buf->memory != gspca_dev->memory) {
d43fa32f 1791 PDEBUG(D_FRAM, "qbuf bad memory type");
5b77ae77
JFM		 1792 ret = -EINVAL;
1793 goto out;
63eb9546 1794 }
e2997a72 1795
5b77ae77 1796 frame = &gspca_dev->frame[index];
d43fa32f
JFM		 1797 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1798 PDEBUG(D_FRAM, "qbuf bad state");
63eb9546
JFM		 1799 ret = -EINVAL;
1800 goto out;
1801 }
1802
1803 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
63eb9546 1804
d43fa32f 1805 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
63eb9546
JFM		 1806 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
1807 frame->v4l2_buf.length = v4l2_buf->length;
1808 }
1809
1810 /* put the buffer in the 'queued' queue */
f7059eaa 1811 i = atomic_read(&gspca_dev->fr_q);
63eb9546 1812 gspca_dev->fr_queue[i] = index;
f7059eaa 1813 atomic_set(&gspca_dev->fr_q, (i + 1) % GSPCA_MAX_FRAMES);
63eb9546
JFM		 1814
1815 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
1816 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
1817 ret = 0;
1818out:
1819 mutex_unlock(&gspca_dev->queue_lock);
1820 return ret;
1821}
1822
d43fa32f
JFM		 1823/*
1824 * allocate the resources for read()
1825 */
1826static int read_alloc(struct gspca_dev *gspca_dev,
1827 struct file *file)
63eb9546 1828{
63eb9546 1829 struct v4l2_buffer v4l2_buf;
d43fa32f 1830 int i, ret;
63eb9546 1831
d43fa32f 1832 PDEBUG(D_STREAM, "read alloc");
a3d6e8cc
HV		 1833
1834 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1835 return -ERESTARTSYS;
1836
63eb9546
JFM		 1837 if (gspca_dev->nframes == 0) {
1838 struct v4l2_requestbuffers rb;
1839
1840 memset(&rb, 0, sizeof rb);
1841 rb.count = gspca_dev->nbufread;
1842 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 1843 rb.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 1844 ret = vidioc_reqbufs(file, gspca_dev, &rb);
1845 if (ret != 0) {
d43fa32f 1846 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
a3d6e8cc 1847 goto out;
63eb9546
JFM		 1848 }
1849 memset(&v4l2_buf, 0, sizeof v4l2_buf);
1850 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 1851 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 1852 for (i = 0; i < gspca_dev->nbufread; i++) {
1853 v4l2_buf.index = i;
63eb9546
JFM		 1854 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1855 if (ret != 0) {
1856 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
a3d6e8cc 1857 goto out;
63eb9546
JFM		 1858 }
1859 }
d43fa32f 1860 }
4aa0d037 1861
d43fa32f
JFM		 1862 /* start streaming */
1863 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
1864 if (ret != 0)
1865 PDEBUG(D_STREAM, "read streamon err %d", ret);
a3d6e8cc
HV		 1866out:
1867 mutex_unlock(&gspca_dev->usb_lock);
d43fa32f
JFM		 1868 return ret;
1869}
1870
1871static unsigned int dev_poll(struct file *file, poll_table *wait)
1872{
f4c1605a 1873 struct gspca_dev *gspca_dev = video_drvdata(file);
a2d887c5
HG		 1874 unsigned long req_events = poll_requested_events(wait);
1875 int ret = 0;
d43fa32f
JFM		 1876
1877 PDEBUG(D_FRAM, "poll");
1878
a2d887c5
HG		 1879 if (req_events & POLLPRI)
1880 ret |= v4l2_ctrl_poll(file, wait);
d43fa32f 1881
a2d887c5
HG		 1882 if (req_events & (POLLIN | POLLRDNORM)) {
1883 /* if reqbufs is not done, the user would use read() */
1884 if (gspca_dev->memory == GSPCA_MEMORY_NO) {
1885 if (read_alloc(gspca_dev, file) != 0) {
1886 ret |= POLLERR;
1887 goto out;
1888 }
1889 }
63eb9546 1890
a2d887c5 1891 poll_wait(file, &gspca_dev->wq, wait);
d43fa32f 1892
a2d887c5
HG		 1893 /* check if an image has been received */
1894 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0) {
1895 ret |= POLLERR;
1896 goto out;
1897 }
1898 if (gspca_dev->fr_o != atomic_read(&gspca_dev->fr_i))
1899 ret |= POLLIN | POLLRDNORM;
1900 mutex_unlock(&gspca_dev->queue_lock);
1901 }
1902
1903out:
090264e5 1904 if (!gspca_dev->present)
a2d887c5
HG		 1905 ret |= POLLHUP;
1906
d43fa32f
JFM		 1907 return ret;
1908}
1909
1910static ssize_t dev_read(struct file *file, char __user *data,
1911 size_t count, loff_t *ppos)
1912{
f4c1605a 1913 struct gspca_dev *gspca_dev = video_drvdata(file);
d43fa32f
JFM		 1914 struct gspca_frame *frame;
1915 struct v4l2_buffer v4l2_buf;
1916 struct timeval timestamp;
82643d0e 1917 int n, ret, ret2;
d43fa32f 1918
a9e11134 1919 PDEBUG(D_FRAM, "read (%zd)", count);
ee362991 1920 if (gspca_dev->memory == GSPCA_MEMORY_NO) { /* first time ? */
d43fa32f
JFM		 1921 ret = read_alloc(gspca_dev, file);
1922 if (ret != 0)
1923 return ret;
d43fa32f
JFM		 1924 }
1925
63eb9546 1926 /* get a frame */
5ba0e2c3 1927 v4l2_get_timestamp(&timestamp);
63eb9546 1928 timestamp.tv_sec--;
82643d0e
JFM		 1929 n = 2;
1930 for (;;) {
63eb9546
JFM		 1931 memset(&v4l2_buf, 0, sizeof v4l2_buf);
1932 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ac0d6df6 1933 v4l2_buf.memory = GSPCA_MEMORY_READ;
63eb9546
JFM		 1934 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
1935 if (ret != 0) {
1936 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
1937 return ret;
1938 }
1939
1940 /* if the process slept for more than 1 second,
219423c1 1941 * get a newer frame */
63eb9546 1942 frame = &gspca_dev->frame[v4l2_buf.index];
82643d0e
JFM		 1943 if (--n < 0)
1944 break; /* avoid infinite loop */
63eb9546
JFM		 1945 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
1946 break;
1947 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1948 if (ret != 0) {
1949 PDEBUG(D_STREAM, "read qbuf err %d", ret);
1950 return ret;
1951 }
1952 }
1953
1954 /* copy the frame */
ac0d6df6
JFM		 1955 if (count > frame->v4l2_buf.bytesused)
1956 count = frame->v4l2_buf.bytesused;
63eb9546
JFM		 1957 ret = copy_to_user(data, frame->data, count);
1958 if (ret != 0) {
c93396e1 1959 PERR("read cp to user lack %d / %zd", ret, count);
63eb9546
JFM		 1960 ret = -EFAULT;
1961 goto out;
1962 }
1963 ret = count;
1964out:
1965 /* in each case, requeue the buffer */
1966 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1967 if (ret2 != 0)
1968 return ret2;
1969 return ret;
1970}
1971
bec43661 1972static struct v4l2_file_operations dev_fops = {
63eb9546
JFM		 1973 .owner = THIS_MODULE,
1974 .open = dev_open,
1975 .release = dev_close,
1976 .read = dev_read,
1977 .mmap = dev_mmap,
bec43661 1978 .unlocked_ioctl = video_ioctl2,
63eb9546
JFM		 1979 .poll = dev_poll,
1980};
1981
a399810c 1982static const struct v4l2_ioctl_ops dev_ioctl_ops = {
63eb9546
JFM		 1983 .vidioc_querycap = vidioc_querycap,
1984 .vidioc_dqbuf = vidioc_dqbuf,
1985 .vidioc_qbuf = vidioc_qbuf,
e078770a
MCC		 1986 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1987 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1988 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1989 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
63eb9546 1990 .vidioc_streamon = vidioc_streamon,
63eb9546
JFM		 1991 .vidioc_enum_input = vidioc_enum_input,
1992 .vidioc_g_input = vidioc_g_input,
1993 .vidioc_s_input = vidioc_s_input,
1994 .vidioc_reqbufs = vidioc_reqbufs,
1995 .vidioc_querybuf = vidioc_querybuf,
1996 .vidioc_streamoff = vidioc_streamoff,
1997 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
1998 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
1999 .vidioc_g_parm = vidioc_g_parm,
2000 .vidioc_s_parm = vidioc_s_parm,
11c635a2 2001 .vidioc_enum_framesizes = vidioc_enum_framesizes,
28ffe77f 2002 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
af1d9afa 2003#ifdef CONFIG_VIDEO_ADV_DEBUG
b1c85cc0 2004 .vidioc_g_chip_info = vidioc_g_chip_info,
af1d9afa
BJ		 2005 .vidioc_g_register = vidioc_g_register,
2006 .vidioc_s_register = vidioc_s_register,
2007#endif
d57fb9f8
HV		 2008 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
2009 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
63eb9546
JFM		 2010};
2011
59929cef 2012static const struct video_device gspca_template = {
a399810c 2013 .name = "gspca main driver",
a399810c
HV		 2014 .fops = &dev_fops,
2015 .ioctl_ops = &dev_ioctl_ops,
a3d6e8cc 2016 .release = video_device_release_empty, /* We use v4l2_dev.release */
a399810c
HV		 2017};
2018
63eb9546
JFM		 2019/*
2020 * probe and create a new gspca device
2021 *
2022 * This function must be called by the sub-driver when it is
2023 * called for probing a new device.
2024 */
4462864d 2025int gspca_dev_probe2(struct usb_interface *intf,
63eb9546
JFM		 2026 const struct usb_device_id *id,
2027 const struct sd_desc *sd_desc,
d43fa32f
JFM		 2028 int dev_size,
2029 struct module *module)
63eb9546 2030{
63eb9546
JFM		 2031 struct gspca_dev *gspca_dev;
2032 struct usb_device *dev = interface_to_usbdev(intf);
2033 int ret;
63eb9546 2034
ee7dd4e0
JFM		 2035 pr_info("%s-" GSPCA_VERSION " probing %04x:%04x\n",
2036 sd_desc->name, id->idVendor, id->idProduct);
63eb9546 2037
63eb9546
JFM		 2038 /* create the device */
2039 if (dev_size < sizeof *gspca_dev)
2040 dev_size = sizeof *gspca_dev;
2041 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
e293e599 2042 if (!gspca_dev) {
133a9fe9 2043 pr_err("couldn't kzalloc gspca struct\n");
e293e599 2044 return -ENOMEM;
63eb9546 2045 }
8295d99e
JFM		 2046 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2047 if (!gspca_dev->usb_buf) {
133a9fe9 2048 pr_err("out of memory\n");
e293e599 2049 ret = -ENOMEM;
8295d99e
JFM		 2050 goto out;
2051 }
63eb9546 2052 gspca_dev->dev = dev;
4462864d 2053 gspca_dev->iface = intf->cur_altsetting->desc.bInterfaceNumber;
2fe15245 2054 gspca_dev->xfer_ep = -1;
35680baa
JFM		 2055
2056 /* check if any audio device */
5dae603d 2057 if (dev->actconfig->desc.bNumInterfaces != 1) {
35680baa
JFM		 2058 int i;
2059 struct usb_interface *intf2;
2060
5dae603d
HG		 2061 for (i = 0; i < dev->actconfig->desc.bNumInterfaces; i++) {
2062 intf2 = dev->actconfig->interface[i];
35680baa
JFM		 2063 if (intf2 != NULL
2064 && intf2->altsetting != NULL
2065 && intf2->altsetting->desc.bInterfaceClass ==
2066 USB_CLASS_AUDIO) {
2067 gspca_dev->audio = 1;
2068 break;
2069 }
2070 }
2071 }
2072
a3d6e8cc 2073 gspca_dev->v4l2_dev.release = gspca_release;
2333565d
HV		 2074 ret = v4l2_device_register(&intf->dev, &gspca_dev->v4l2_dev);
2075 if (ret)
2076 goto out;
63eb9546 2077 gspca_dev->sd_desc = sd_desc;
63eb9546 2078 gspca_dev->nbufread = 2;
ff374747 2079 gspca_dev->empty_packet = -1; /* don't check the empty packets */
62bba5dd 2080 gspca_dev->vdev = gspca_template;
2333565d 2081 gspca_dev->vdev.v4l2_dev = &gspca_dev->v4l2_dev;
f4c1605a 2082 video_set_drvdata(&gspca_dev->vdev, gspca_dev);
62bba5dd
HV		 2083 gspca_dev->module = module;
2084 gspca_dev->present = 1;
2085
2086 mutex_init(&gspca_dev->usb_lock);
a3d6e8cc 2087 gspca_dev->vdev.lock = &gspca_dev->usb_lock;
62bba5dd
HV		 2088 mutex_init(&gspca_dev->queue_lock);
2089 init_waitqueue_head(&gspca_dev->wq);
63eb9546 2090
012d6b02 2091 /* configure the subdriver and initialize the USB device */
ba38ee8e 2092 ret = sd_desc->config(gspca_dev, id);
012d6b02
JFM		 2093 if (ret < 0)
2094 goto out;
ba38ee8e 2095 ret = sd_desc->init(gspca_dev);
62bba5dd
HV		 2096 if (ret < 0)
2097 goto out;
2098 if (sd_desc->init_controls)
2099 ret = sd_desc->init_controls(gspca_dev);
63eb9546
JFM		 2100 if (ret < 0)
2101 goto out;
2102 gspca_set_default_mode(gspca_dev);
2103
10ee2402
HG		 2104 ret = gspca_input_connect(gspca_dev);
2105 if (ret)
2106 goto out;
2107
a3d6e8cc
HV		 2108 /*
2109 * Don't take usb_lock for these ioctls. This improves latency if
2110 * usb_lock is taken for a long time, e.g. when changing a control
2111 * value, and a new frame is ready to be dequeued.
2112 */
152a3a73
HV		 2113 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_DQBUF);
2114 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QBUF);
2115 v4l2_disable_ioctl_locking(&gspca_dev->vdev, VIDIOC_QUERYBUF);
ac3322b0 2116#ifdef CONFIG_VIDEO_ADV_DEBUG
b1c85cc0 2117 if (!gspca_dev->sd_desc->get_register)
ac3322b0 2118 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_G_REGISTER);
b1c85cc0 2119 if (!gspca_dev->sd_desc->set_register)
ac3322b0
HV		 2120 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_DBG_S_REGISTER);
2121#endif
2122 if (!gspca_dev->sd_desc->get_jcomp)
2123 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_G_JPEGCOMP);
2124 if (!gspca_dev->sd_desc->set_jcomp)
2125 v4l2_disable_ioctl(&gspca_dev->vdev, VIDIOC_S_JPEGCOMP);
a3d6e8cc 2126
63eb9546 2127 /* init video stuff */
a12ca6a6 2128 ret = video_register_device(&gspca_dev->vdev,
63eb9546 2129 VFL_TYPE_GRABBER,
8d584a53 2130 -1);
63eb9546 2131 if (ret < 0) {
133a9fe9 2132 pr_err("video_register_device err %d\n", ret);
63eb9546
JFM		 2133 goto out;
2134 }
2135
63eb9546 2136 usb_set_intfdata(intf, gspca_dev);
38c7c036 2137 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
0274d42e 2138
10ee2402 2139 gspca_input_create_urb(gspca_dev);
0274d42e 2140
63eb9546
JFM		 2141 return 0;
2142out:
13a00fab 2143#if IS_ENABLED(CONFIG_INPUT)
10ee2402
HG		 2144 if (gspca_dev->input_dev)
2145 input_unregister_device(gspca_dev->input_dev);
e7637521 2146#endif
62bba5dd 2147 v4l2_ctrl_handler_free(gspca_dev->vdev.ctrl_handler);
e07a1d8a
JFM		 2148 kfree(gspca_dev->usb_buf);
2149 kfree(gspca_dev);
63eb9546
JFM		 2150 return ret;
2151}
4462864d
JFM		 2152EXPORT_SYMBOL(gspca_dev_probe2);
2153
2154/* same function as the previous one, but check the interface */
2155int gspca_dev_probe(struct usb_interface *intf,
2156 const struct usb_device_id *id,
2157 const struct sd_desc *sd_desc,
2158 int dev_size,
2159 struct module *module)
2160{
2161 struct usb_device *dev = interface_to_usbdev(intf);
2162
2163 /* we don't handle multi-config cameras */
2164 if (dev->descriptor.bNumConfigurations != 1) {
133a9fe9
JP		 2165 pr_err("%04x:%04x too many config\n",
2166 id->idVendor, id->idProduct);
4462864d
JFM		 2167 return -ENODEV;
2168 }
2169
2170 /* the USB video interface must be the first one */
5dae603d 2171 if (dev->actconfig->desc.bNumInterfaces != 1
c4dc692c 2172 && intf->cur_altsetting->desc.bInterfaceNumber != 0)
4462864d 2173 return -ENODEV;
4462864d
JFM		 2174
2175 return gspca_dev_probe2(intf, id, sd_desc, dev_size, module);
2176}
63eb9546
JFM		 2177EXPORT_SYMBOL(gspca_dev_probe);
2178
2179/*
2180 * USB disconnection
2181 *
2182 * This function must be called by the sub-driver
2183 * when the device disconnects, after the specific resources are freed.
2184 */
2185void gspca_disconnect(struct usb_interface *intf)
2186{
4aa0d037 2187 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
13a00fab 2188#if IS_ENABLED(CONFIG_INPUT)
0274d42e 2189 struct input_dev *input_dev;
e070bf9e 2190#endif
63eb9546 2191
38c7c036
LP		 2192 PDEBUG(D_PROBE, "%s disconnect",
2193 video_device_node_name(&gspca_dev->vdev));
a3d6e8cc 2194
ad28127d 2195 mutex_lock(&gspca_dev->usb_lock);
4e770f76 2196
6e4ae872 2197 gspca_dev->present = 0;
4e770f76 2198 destroy_urbs(gspca_dev);
090264e5 2199
13a00fab 2200#if IS_ENABLED(CONFIG_INPUT)
0274d42e
MN		 2201 gspca_input_destroy_urb(gspca_dev);
2202 input_dev = gspca_dev->input_dev;
2203 if (input_dev) {
2204 gspca_dev->input_dev = NULL;
2205 input_unregister_device(input_dev);
2206 }
e070bf9e 2207#endif
eb238732
HG		 2208 /* Free subdriver's streaming resources / stop sd workqueue(s) */
2209 if (gspca_dev->sd_desc->stop0 && gspca_dev->streaming)
2210 gspca_dev->sd_desc->stop0(gspca_dev);
2211 gspca_dev->streaming = 0;
345321dc 2212 gspca_dev->dev = NULL;
eb238732 2213 wake_up_interruptible(&gspca_dev->wq);
0274d42e 2214
2333565d 2215 v4l2_device_disconnect(&gspca_dev->v4l2_dev);
a3d6e8cc 2216 video_unregister_device(&gspca_dev->vdev);
090264e5 2217
a3d6e8cc 2218 mutex_unlock(&gspca_dev->usb_lock);
6b060ffe 2219
25985edc 2220 /* (this will call gspca_release() immediately or on last close) */
a3d6e8cc 2221 v4l2_device_put(&gspca_dev->v4l2_dev);
63eb9546
JFM		 2222}
2223EXPORT_SYMBOL(gspca_disconnect);
2224
6a709749
JFM		 2225#ifdef CONFIG_PM
2226int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2227{
2228 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2229
36adfca9
HG		 2230 gspca_input_destroy_urb(gspca_dev);
2231
6a709749
JFM		 2232 if (!gspca_dev->streaming)
2233 return 0;
36adfca9 2234
a3d6e8cc 2235 mutex_lock(&gspca_dev->usb_lock);
6a709749 2236 gspca_dev->frozen = 1; /* avoid urb error messages */
9a190c85 2237 gspca_dev->usb_err = 0;
012d6b02
JFM		 2238 if (gspca_dev->sd_desc->stopN)
2239 gspca_dev->sd_desc->stopN(gspca_dev);
6a709749
JFM		 2240 destroy_urbs(gspca_dev);
2241 gspca_set_alt0(gspca_dev);
a3d6e8cc 2242 if (gspca_dev->sd_desc->stop0)
012d6b02 2243 gspca_dev->sd_desc->stop0(gspca_dev);
a3d6e8cc 2244 mutex_unlock(&gspca_dev->usb_lock);
36adfca9 2245
6a709749
JFM		 2246 return 0;
2247}
2248EXPORT_SYMBOL(gspca_suspend);
2249
2250int gspca_resume(struct usb_interface *intf)
2251{
2252 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
254902b0 2253 int streaming, ret = 0;
6a709749 2254
a3d6e8cc 2255 mutex_lock(&gspca_dev->usb_lock);
6a709749 2256 gspca_dev->frozen = 0;
9a190c85 2257 gspca_dev->usb_err = 0;
012d6b02 2258 gspca_dev->sd_desc->init(gspca_dev);
62bba5dd
HV		 2259 /*
2260 * Most subdrivers send all ctrl values on sd_start and thus
2261 * only write to the device registers on s_ctrl when streaming ->
2262 * Clear streaming to avoid setting all ctrls twice.
2263 */
2264 streaming = gspca_dev->streaming;
2265 gspca_dev->streaming = 0;
a3d6e8cc 2266 if (streaming)
254902b0 2267 ret = gspca_init_transfer(gspca_dev);
36adfca9
HG		 2268 else
2269 gspca_input_create_urb(gspca_dev);
a3d6e8cc 2270 mutex_unlock(&gspca_dev->usb_lock);
36adfca9 2271
254902b0 2272 return ret;
6a709749
JFM		 2273}
2274EXPORT_SYMBOL(gspca_resume);
2275#endif
dcef3237 2276
63eb9546
JFM		 2277/* -- module insert / remove -- */
2278static int __init gspca_init(void)
2279{
f22123fa 2280 pr_info("v" GSPCA_VERSION " registered\n");
63eb9546
JFM		 2281 return 0;
2282}
2283static void __exit gspca_exit(void)
2284{
63eb9546
JFM		 2285}
2286
2287module_init(gspca_init);
2288module_exit(gspca_exit);
2289
2290module_param_named(debug, gspca_debug, int, 0644);
2291MODULE_PARM_DESC(debug,
c93396e1 2292 "1:probe 2:config 3:stream 4:frame 5:packet 6:usbi 7:usbo");
Linux kernel - Deliverables
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