blob: f1108f1be8374a5d097f6987a8a4671897d336af [file] [log] [blame]
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001/*
2 * Main USB camera driver
3 *
Jean-Francois Moine11bd1992009-04-21 04:17:59 -03004 * Copyright (C) 2008-2009 Jean-Francois Moine (http://moinejf.free.fr)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03005 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21#define MODULE_NAME "gspca"
22
23#include <linux/init.h>
Jean-Francois Moinecf0fe082008-10-17 04:36:47 -030024#include <linux/version.h>
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030025#include <linux/fs.h>
26#include <linux/vmalloc.h>
27#include <linux/sched.h>
28#include <linux/slab.h>
29#include <linux/mm.h>
30#include <linux/string.h>
31#include <linux/pagemap.h>
Jean-Francois Moine956e42d2008-07-01 10:03:42 -030032#include <linux/io.h>
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030033#include <asm/page.h>
Jean-Francois Moine956e42d2008-07-01 10:03:42 -030034#include <linux/uaccess.h>
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030035#include <linux/jiffies.h>
Hans Verkuil35ea11f2008-07-20 08:12:02 -030036#include <media/v4l2-ioctl.h>
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030037
38#include "gspca.h"
39
Jean-Francois Moined43fa322008-06-12 10:58:58 -030040/* global values */
Jean-Francois Moine8fee8452009-01-17 04:46:38 -030041#define DEF_NURBS 3 /* default number of URBs */
42#if DEF_NURBS > MAX_NURBS
43#error "DEF_NURBS too big"
44#endif
Jean-Francois Moined43fa322008-06-12 10:58:58 -030045
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030046MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
47MODULE_DESCRIPTION("GSPCA USB Camera Driver");
48MODULE_LICENSE("GPL");
49
Jean-Francois Moine11bd1992009-04-21 04:17:59 -030050#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 6, 0)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030051
Jean-Francois Moine335b3f82008-07-30 04:53:02 -030052#ifdef GSPCA_DEBUG
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030053int gspca_debug = D_ERR | D_PROBE;
54EXPORT_SYMBOL(gspca_debug);
55
56static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h)
57{
58 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
59 PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d",
60 txt,
61 pixfmt & 0xff,
62 (pixfmt >> 8) & 0xff,
63 (pixfmt >> 16) & 0xff,
64 pixfmt >> 24,
65 w, h);
66 } else {
67 PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d",
68 txt,
69 pixfmt,
70 w, h);
71 }
72}
73#else
74#define PDEBUG_MODE(txt, pixfmt, w, h)
75#endif
76
Jean-Francois Moined43fa322008-06-12 10:58:58 -030077/* specific memory types - !! should different from V4L2_MEMORY_xxx */
78#define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
79#define GSPCA_MEMORY_READ 7
80
Jean-Francois Moined43fa322008-06-12 10:58:58 -030081#define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
Jean-Francois Moined43fa322008-06-12 10:58:58 -030082
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030083/*
84 * VMA operations.
85 */
86static void gspca_vm_open(struct vm_area_struct *vma)
87{
88 struct gspca_frame *frame = vma->vm_private_data;
89
90 frame->vma_use_count++;
91 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
92}
93
94static void gspca_vm_close(struct vm_area_struct *vma)
95{
96 struct gspca_frame *frame = vma->vm_private_data;
97
98 if (--frame->vma_use_count <= 0)
99 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
100}
101
102static struct vm_operations_struct gspca_vm_ops = {
103 .open = gspca_vm_open,
104 .close = gspca_vm_close,
105};
106
Jean-Francois Moine1b60e1a2008-09-20 05:44:21 -0300107/* get the current input frame buffer */
108struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev)
109{
110 struct gspca_frame *frame;
111 int i;
112
113 i = gspca_dev->fr_i;
114 i = gspca_dev->fr_queue[i];
115 frame = &gspca_dev->frame[i];
116 if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
117 != V4L2_BUF_FLAG_QUEUED)
118 return NULL;
119 return frame;
120}
121EXPORT_SYMBOL(gspca_get_i_frame);
122
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300123/*
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300124 * fill a video frame from an URB and resubmit
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300125 */
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300126static void fill_frame(struct gspca_dev *gspca_dev,
127 struct urb *urb)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300128{
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300129 struct gspca_frame *frame;
Jean-Francois Moine8d584a52009-01-13 06:07:59 -0300130 u8 *data; /* address of data in the iso message */
Jean-Francois Moine1b60e1a2008-09-20 05:44:21 -0300131 int i, len, st;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300132 cam_pkt_op pkt_scan;
133
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300134 if (urb->status != 0) {
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300135 if (urb->status == -ESHUTDOWN)
136 return; /* disconnection */
Jean-Francois Moine62ee8ee2008-09-03 17:12:13 -0300137#ifdef CONFIG_PM
Jean-Francois Moine6a709742008-09-03 16:48:10 -0300138 if (!gspca_dev->frozen)
Jean-Francois Moine62ee8ee2008-09-03 17:12:13 -0300139#endif
Jean-Francois Moine6a709742008-09-03 16:48:10 -0300140 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300141 return;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300142 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300143 pkt_scan = gspca_dev->sd_desc->pkt_scan;
144 for (i = 0; i < urb->number_of_packets; i++) {
145
146 /* check the availability of the frame buffer */
Jean-Francois Moine1b60e1a2008-09-20 05:44:21 -0300147 frame = gspca_get_i_frame(gspca_dev);
148 if (!frame) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300149 gspca_dev->last_packet_type = DISCARD_PACKET;
150 break;
151 }
152
153 /* check the packet status and length */
154 len = urb->iso_frame_desc[i].actual_length;
Jean-Francois Moineff374742008-10-23 07:29:51 -0300155 if (len == 0) {
156 if (gspca_dev->empty_packet == 0)
157 gspca_dev->empty_packet = 1;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300158 continue;
Jean-Francois Moineff374742008-10-23 07:29:51 -0300159 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300160 st = urb->iso_frame_desc[i].status;
161 if (st) {
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300162 PDEBUG(D_ERR,
163 "ISOC data error: [%d] len=%d, status=%d",
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300164 i, len, st);
165 gspca_dev->last_packet_type = DISCARD_PACKET;
166 continue;
167 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300168
169 /* let the packet be analyzed by the subdriver */
170 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
171 i, urb->iso_frame_desc[i].offset, len);
Jean-Francois Moine8d584a52009-01-13 06:07:59 -0300172 data = (u8 *) urb->transfer_buffer
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300173 + urb->iso_frame_desc[i].offset;
174 pkt_scan(gspca_dev, frame, data, len);
175 }
176
177 /* resubmit the URB */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300178 st = usb_submit_urb(urb, GFP_ATOMIC);
179 if (st < 0)
180 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
181}
182
183/*
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300184 * ISOC message interrupt from the USB device
185 *
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300186 * Analyse each packet and call the subdriver for copy to the frame buffer.
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300187 */
Jean-Francois Moine8d584a52009-01-13 06:07:59 -0300188static void isoc_irq(struct urb *urb)
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300189{
190 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
191
Hans de Goede3647fea2008-07-15 05:36:30 -0300192 PDEBUG(D_PACK, "isoc irq");
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300193 if (!gspca_dev->streaming)
194 return;
195 fill_frame(gspca_dev, urb);
196}
197
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300198/*
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300199 * bulk message interrupt from the USB device
200 */
Jean-Francois Moine8d584a52009-01-13 06:07:59 -0300201static void bulk_irq(struct urb *urb)
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300202{
203 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
204 struct gspca_frame *frame;
Antonio Ospitedff369a2008-11-14 07:53:32 -0300205 int st;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300206
207 PDEBUG(D_PACK, "bulk irq");
208 if (!gspca_dev->streaming)
209 return;
Jean-Francois Moine880ae242008-11-18 04:19:52 -0300210 switch (urb->status) {
211 case 0:
212 break;
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300213 case -ESHUTDOWN:
214 return; /* disconnection */
Jean-Francois Moine880ae242008-11-18 04:19:52 -0300215 case -ECONNRESET:
216 urb->status = 0;
217 break;
218 default:
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300219#ifdef CONFIG_PM
220 if (!gspca_dev->frozen)
221#endif
222 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300223 return;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300224 }
225
226 /* check the availability of the frame buffer */
Jean-Francois Moine1b60e1a2008-09-20 05:44:21 -0300227 frame = gspca_get_i_frame(gspca_dev);
228 if (!frame) {
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300229 gspca_dev->last_packet_type = DISCARD_PACKET;
230 } else {
231 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
232 gspca_dev->sd_desc->pkt_scan(gspca_dev,
233 frame,
234 urb->transfer_buffer,
235 urb->actual_length);
236 }
Antonio Ospitedff369a2008-11-14 07:53:32 -0300237
238 /* resubmit the URB */
239 if (gspca_dev->cam.bulk_nurbs != 0) {
240 st = usb_submit_urb(urb, GFP_ATOMIC);
241 if (st < 0)
242 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
243 }
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300244}
245
246/*
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300247 * add data to the current frame
248 *
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300249 * This function is called by the subdrivers at interrupt level.
250 *
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300251 * To build a frame, these ones must add
252 * - one FIRST_PACKET
253 * - 0 or many INTER_PACKETs
254 * - one LAST_PACKET
255 * DISCARD_PACKET invalidates the whole frame.
256 * On LAST_PACKET, a new frame is returned.
257 */
258struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
Erik Andrene293e592008-10-03 08:46:50 -0300259 enum gspca_packet_type packet_type,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300260 struct gspca_frame *frame,
Jean-Francois Moinea5ae2062008-07-04 11:16:16 -0300261 const __u8 *data,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300262 int len)
263{
264 int i, j;
265
Hans de Goedee2997a72008-04-23 08:09:12 -0300266 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300267
268 /* when start of a new frame, if the current frame buffer
269 * is not queued, discard the whole frame */
270 if (packet_type == FIRST_PACKET) {
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300271 if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
272 != V4L2_BUF_FLAG_QUEUED) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300273 gspca_dev->last_packet_type = DISCARD_PACKET;
274 return frame;
275 }
276 frame->data_end = frame->data;
277 jiffies_to_timeval(get_jiffies_64(),
278 &frame->v4l2_buf.timestamp);
279 frame->v4l2_buf.sequence = ++gspca_dev->sequence;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300280 } else if (gspca_dev->last_packet_type == DISCARD_PACKET) {
Jean-Francois Moine06ca78f2008-07-22 03:45:08 -0300281 if (packet_type == LAST_PACKET)
282 gspca_dev->last_packet_type = packet_type;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300283 return frame;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300284 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300285
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300286 /* append the packet to the frame buffer */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300287 if (len > 0) {
288 if (frame->data_end - frame->data + len
289 > frame->v4l2_buf.length) {
Mauro Carvalho Chehaba9e11132008-07-09 05:26:26 -0300290 PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d",
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300291 frame->data_end - frame->data + len,
292 frame->v4l2_buf.length);
293 packet_type = DISCARD_PACKET;
294 } else {
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300295 memcpy(frame->data_end, data, len);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300296 frame->data_end += len;
297 }
298 }
299 gspca_dev->last_packet_type = packet_type;
300
Frank Zago219423c2008-09-26 07:43:54 -0300301 /* if last packet, wake up the application and advance in the queue */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300302 if (packet_type == LAST_PACKET) {
303 frame->v4l2_buf.bytesused = frame->data_end - frame->data;
304 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED;
305 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300306 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300307 i = (gspca_dev->fr_i + 1) % gspca_dev->nframes;
308 gspca_dev->fr_i = i;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300309 PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d",
310 frame->v4l2_buf.bytesused,
311 gspca_dev->fr_q,
312 i,
313 gspca_dev->fr_o);
314 j = gspca_dev->fr_queue[i];
315 frame = &gspca_dev->frame[j];
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300316 }
317 return frame;
318}
319EXPORT_SYMBOL(gspca_frame_add);
320
321static int gspca_is_compressed(__u32 format)
322{
323 switch (format) {
324 case V4L2_PIX_FMT_MJPEG:
325 case V4L2_PIX_FMT_JPEG:
Jean-Francois Moine50a871f2008-06-30 19:47:33 -0300326 case V4L2_PIX_FMT_SPCA561:
Hans de Goedeab8f12c2008-07-04 18:29:32 -0300327 case V4L2_PIX_FMT_PAC207:
Kyle Guinnd661e622009-01-16 05:36:14 -0300328 case V4L2_PIX_FMT_MR97310A:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300329 return 1;
330 }
331 return 0;
332}
333
334static void *rvmalloc(unsigned long size)
335{
336 void *mem;
337 unsigned long adr;
338
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300339 mem = vmalloc_32(size);
Harvey Harrisonefab8212008-07-05 06:12:47 -0300340 if (mem != NULL) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300341 adr = (unsigned long) mem;
342 while ((long) size > 0) {
343 SetPageReserved(vmalloc_to_page((void *) adr));
344 adr += PAGE_SIZE;
345 size -= PAGE_SIZE;
346 }
347 }
348 return mem;
349}
350
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300351static void rvfree(void *mem, long size)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300352{
353 unsigned long adr;
354
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300355 adr = (unsigned long) mem;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300356 while (size > 0) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300357 ClearPageReserved(vmalloc_to_page((void *) adr));
358 adr += PAGE_SIZE;
359 size -= PAGE_SIZE;
360 }
361 vfree(mem);
362}
363
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300364static int frame_alloc(struct gspca_dev *gspca_dev,
365 unsigned int count)
366{
367 struct gspca_frame *frame;
368 unsigned int frsz;
369 int i;
370
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300371 i = gspca_dev->curr_mode;
372 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300373 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300374 frsz = PAGE_ALIGN(frsz);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300375 gspca_dev->frsz = frsz;
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300376 if (count > GSPCA_MAX_FRAMES)
377 count = GSPCA_MAX_FRAMES;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300378 gspca_dev->frbuf = rvmalloc(frsz * count);
379 if (!gspca_dev->frbuf) {
380 err("frame alloc failed");
381 return -ENOMEM;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300382 }
383 gspca_dev->nframes = count;
384 for (i = 0; i < count; i++) {
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300385 frame = &gspca_dev->frame[i];
386 frame->v4l2_buf.index = i;
387 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
388 frame->v4l2_buf.flags = 0;
389 frame->v4l2_buf.field = V4L2_FIELD_NONE;
390 frame->v4l2_buf.length = frsz;
391 frame->v4l2_buf.memory = gspca_dev->memory;
392 frame->v4l2_buf.sequence = 0;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300393 frame->data = frame->data_end =
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300394 gspca_dev->frbuf + i * frsz;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300395 frame->v4l2_buf.m.offset = i * frsz;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300396 }
397 gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
398 gspca_dev->last_packet_type = DISCARD_PACKET;
399 gspca_dev->sequence = 0;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300400 return 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300401}
402
403static void frame_free(struct gspca_dev *gspca_dev)
404{
405 int i;
406
407 PDEBUG(D_STREAM, "frame free");
Harvey Harrisonefab8212008-07-05 06:12:47 -0300408 if (gspca_dev->frbuf != NULL) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300409 rvfree(gspca_dev->frbuf,
410 gspca_dev->nframes * gspca_dev->frsz);
411 gspca_dev->frbuf = NULL;
412 for (i = 0; i < gspca_dev->nframes; i++)
413 gspca_dev->frame[i].data = NULL;
414 }
415 gspca_dev->nframes = 0;
416}
417
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300418static void destroy_urbs(struct gspca_dev *gspca_dev)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300419{
420 struct urb *urb;
421 unsigned int i;
422
423 PDEBUG(D_STREAM, "kill transfer");
Erik Andrén44732812008-10-13 15:52:46 -0300424 for (i = 0; i < MAX_NURBS; i++) {
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300425 urb = gspca_dev->urb[i];
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300426 if (urb == NULL)
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300427 break;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300428
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300429 gspca_dev->urb[i] = NULL;
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300430 usb_kill_urb(urb);
Harvey Harrisonefab8212008-07-05 06:12:47 -0300431 if (urb->transfer_buffer != NULL)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300432 usb_buffer_free(gspca_dev->dev,
433 urb->transfer_buffer_length,
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300434 urb->transfer_buffer,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300435 urb->transfer_dma);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300436 usb_free_urb(urb);
437 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300438}
439
440/*
Frank Zago219423c2008-09-26 07:43:54 -0300441 * look for an input transfer endpoint in an alternate setting
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300442 */
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300443static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300444 int xfer)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300445{
446 struct usb_host_endpoint *ep;
447 int i, attr;
448
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300449 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
450 ep = &alt->endpoint[i];
Jean-Francois Moine50e06de2008-12-31 08:13:46 -0300451 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
Jean-Francois Moine30d35e42009-04-21 13:57:31 -0300452 if (attr == xfer
453 && ep->desc.wMaxPacketSize != 0)
Jean-Francois Moine50e06de2008-12-31 08:13:46 -0300454 return ep;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300455 }
456 return NULL;
457}
458
459/*
Frank Zago219423c2008-09-26 07:43:54 -0300460 * look for an input (isoc or bulk) endpoint
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300461 *
462 * The endpoint is defined by the subdriver.
463 * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
464 * This routine may be called many times when the bandwidth is too small
465 * (the bandwidth is checked on urb submit).
466 */
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300467static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300468{
469 struct usb_interface *intf;
470 struct usb_host_endpoint *ep;
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300471 int xfer, i, ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300472
473 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300474 ep = NULL;
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300475 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
476 : USB_ENDPOINT_XFER_ISOC;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300477 i = gspca_dev->alt; /* previous alt setting */
Jean-Francois Moine0dc641d2009-03-19 05:55:22 -0300478 while (--i >= 0) {
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300479 ep = alt_xfer(&intf->altsetting[i], xfer);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300480 if (ep)
481 break;
482 }
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300483 if (ep == NULL) {
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300484 err("no transfer endpoint found");
485 return NULL;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300486 }
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300487 PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300488 i, ep->desc.bEndpointAddress);
Jean-Francois Moine8dd07ef2009-04-21 14:05:44 -0300489 if (gspca_dev->nbalt > 1) {
Jean-Francois Moine95d91422008-09-29 05:57:32 -0300490 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
491 if (ret < 0) {
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300492 err("set alt %d err %d", i, ret);
Jean-Francois Moine95d91422008-09-29 05:57:32 -0300493 return NULL;
494 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300495 }
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300496 gspca_dev->alt = i; /* memorize the current alt setting */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300497 return ep;
498}
499
500/*
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300501 * create the URBs for image transfer
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300502 */
503static int create_urbs(struct gspca_dev *gspca_dev,
504 struct usb_host_endpoint *ep)
505{
506 struct urb *urb;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300507 int n, nurbs, i, psize, npkt, bsize;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300508
509 /* calculate the packet size and the number of packets */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300510 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300511
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300512 if (!gspca_dev->cam.bulk) { /* isoc */
Jean-Francois Moine95d91422008-09-29 05:57:32 -0300513
514 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
515 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
Jean-Francois Moine49cb6b02009-04-25 13:29:01 -0300516 npkt = gspca_dev->cam.npkt;
517 if (npkt == 0)
518 npkt = 32; /* default value */
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300519 bsize = psize * npkt;
520 PDEBUG(D_STREAM,
521 "isoc %d pkts size %d = bsize:%d",
522 npkt, psize, bsize);
Jean-Francois Moine51977a82008-09-08 03:22:42 -0300523 nurbs = DEF_NURBS;
Jean-Francois Moine95d91422008-09-29 05:57:32 -0300524 } else { /* bulk */
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300525 npkt = 0;
Antonio Ospitedff369a2008-11-14 07:53:32 -0300526 bsize = gspca_dev->cam.bulk_size;
Jean-Francois Moine95d91422008-09-29 05:57:32 -0300527 if (bsize == 0)
528 bsize = psize;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300529 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
Antonio Ospitedff369a2008-11-14 07:53:32 -0300530 if (gspca_dev->cam.bulk_nurbs != 0)
531 nurbs = gspca_dev->cam.bulk_nurbs;
532 else
533 nurbs = 1;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300534 }
535
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300536 gspca_dev->nurbs = nurbs;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300537 for (n = 0; n < nurbs; n++) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300538 urb = usb_alloc_urb(npkt, GFP_KERNEL);
539 if (!urb) {
540 err("usb_alloc_urb failed");
Jean-Francois Moine0d0548e2008-09-05 12:49:54 -0300541 destroy_urbs(gspca_dev);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300542 return -ENOMEM;
543 }
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300544 urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300545 bsize,
546 GFP_KERNEL,
547 &urb->transfer_dma);
548
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300549 if (urb->transfer_buffer == NULL) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300550 usb_free_urb(urb);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300551 err("usb_buffer_urb failed");
Jean-Francois Moine0d0548e2008-09-05 12:49:54 -0300552 destroy_urbs(gspca_dev);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300553 return -ENOMEM;
554 }
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300555 gspca_dev->urb[n] = urb;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300556 urb->dev = gspca_dev->dev;
557 urb->context = gspca_dev;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300558 urb->transfer_buffer_length = bsize;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300559 if (npkt != 0) { /* ISOC */
560 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
561 ep->desc.bEndpointAddress);
Frank Zago6c49da72008-09-28 07:43:00 -0300562 urb->transfer_flags = URB_ISO_ASAP
563 | URB_NO_TRANSFER_DMA_MAP;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300564 urb->interval = ep->desc.bInterval;
565 urb->complete = isoc_irq;
566 urb->number_of_packets = npkt;
567 for (i = 0; i < npkt; i++) {
568 urb->iso_frame_desc[i].length = psize;
569 urb->iso_frame_desc[i].offset = psize * i;
570 }
571 } else { /* bulk */
572 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
573 ep->desc.bEndpointAddress),
Frank Zago6c49da72008-09-28 07:43:00 -0300574 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300575 urb->complete = bulk_irq;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300576 }
577 }
578 return 0;
579}
580
581/*
582 * start the USB transfer
583 */
584static int gspca_init_transfer(struct gspca_dev *gspca_dev)
585{
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300586 struct usb_host_endpoint *ep;
587 int n, ret;
588
Hans de Goedee2997a72008-04-23 08:09:12 -0300589 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
590 return -ERESTARTSYS;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300591
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300592 if (!gspca_dev->present) {
593 ret = -ENODEV;
594 goto out;
595 }
596
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300597 /* set the higher alternate setting and
598 * loop until urb submit succeeds */
599 gspca_dev->alt = gspca_dev->nbalt;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300600 for (;;) {
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300601 PDEBUG(D_STREAM, "init transfer alt %d", gspca_dev->alt);
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300602 ep = get_ep(gspca_dev);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300603 if (ep == NULL) {
604 ret = -EIO;
605 goto out;
606 }
607 ret = create_urbs(gspca_dev, ep);
608 if (ret < 0)
609 goto out;
610
Jean-Francois Moine8fe2f1d2008-10-22 14:51:56 -0300611 /* clear the bulk endpoint */
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300612 if (gspca_dev->cam.bulk)
Jean-Francois Moine8fe2f1d2008-10-22 14:51:56 -0300613 usb_clear_halt(gspca_dev->dev,
Jean-Francois Moine50e06de2008-12-31 08:13:46 -0300614 gspca_dev->urb[0]->pipe);
Jean-Francois Moine8fe2f1d2008-10-22 14:51:56 -0300615
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300616 /* start the cam */
Jean-Francois Moine72ab97c2008-09-20 06:39:08 -0300617 ret = gspca_dev->sd_desc->start(gspca_dev);
618 if (ret < 0) {
619 destroy_urbs(gspca_dev);
620 goto out;
621 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300622 gspca_dev->streaming = 1;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300623
Antonio Ospitedff369a2008-11-14 07:53:32 -0300624 /* some bulk transfers are started by the subdriver */
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300625 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
Jean-Francois Moine51977a82008-09-08 03:22:42 -0300626 break;
627
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300628 /* submit the URBs */
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300629 for (n = 0; n < gspca_dev->nurbs; n++) {
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300630 ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300631 if (ret < 0) {
632 PDEBUG(D_ERR|D_STREAM,
633 "usb_submit_urb [%d] err %d", n, ret);
Hans de Goedee2997a72008-04-23 08:09:12 -0300634 gspca_dev->streaming = 0;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300635 destroy_urbs(gspca_dev);
Jean-Francois Moine9edf1a62008-11-23 15:53:28 -0300636 if (ret == -ENOSPC) {
Jean-Francois Moineabf485f2008-11-24 06:38:21 -0300637 msleep(20); /* wait for kill
Jean-Francois Moine9edf1a62008-11-23 15:53:28 -0300638 * complete */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300639 break; /* try the previous alt */
Jean-Francois Moine9edf1a62008-11-23 15:53:28 -0300640 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300641 goto out;
642 }
643 }
644 if (ret >= 0)
645 break;
646 }
647out:
648 mutex_unlock(&gspca_dev->usb_lock);
649 return ret;
650}
651
652static int gspca_set_alt0(struct gspca_dev *gspca_dev)
653{
654 int ret;
655
Jean-Francois Moine8dd07ef2009-04-21 14:05:44 -0300656 if (gspca_dev->alt == 0)
657 return 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300658 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
659 if (ret < 0)
Jean-Francois Moinef955c4f2008-11-28 08:51:50 -0300660 PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300661 return ret;
662}
663
Frank Zago219423c2008-09-26 07:43:54 -0300664/* Note: both the queue and the usb locks should be held when calling this */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300665static void gspca_stream_off(struct gspca_dev *gspca_dev)
666{
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300667 gspca_dev->streaming = 0;
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300668 if (gspca_dev->present) {
669 if (gspca_dev->sd_desc->stopN)
670 gspca_dev->sd_desc->stopN(gspca_dev);
671 destroy_urbs(gspca_dev);
Jean-Francois Moined08e2ce2009-01-20 16:21:44 -0300672 gspca_set_alt0(gspca_dev);
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300673 }
674
675 /* always call stop0 to free the subdriver's resources */
Jean-Francois Moine98522a72008-11-18 06:33:08 -0300676 if (gspca_dev->sd_desc->stop0)
677 gspca_dev->sd_desc->stop0(gspca_dev);
678 PDEBUG(D_STREAM, "stream off OK");
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300679}
680
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300681static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300682{
683 int i;
684
685 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
686 gspca_dev->curr_mode = i;
687 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
688 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300689 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300690}
691
692static int wxh_to_mode(struct gspca_dev *gspca_dev,
693 int width, int height)
694{
695 int i;
696
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300697 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
698 if (width >= gspca_dev->cam.cam_mode[i].width
699 && height >= gspca_dev->cam.cam_mode[i].height)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300700 break;
701 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300702 return i;
703}
704
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300705/*
706 * search a mode with the right pixel format
707 */
708static int gspca_get_mode(struct gspca_dev *gspca_dev,
709 int mode,
710 int pixfmt)
711{
712 int modeU, modeD;
713
714 modeU = modeD = mode;
715 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
716 if (--modeD >= 0) {
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300717 if (gspca_dev->cam.cam_mode[modeD].pixelformat
718 == pixfmt)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300719 return modeD;
720 }
721 if (++modeU < gspca_dev->cam.nmodes) {
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300722 if (gspca_dev->cam.cam_mode[modeU].pixelformat
723 == pixfmt)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300724 return modeU;
725 }
726 }
727 return -EINVAL;
728}
729
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -0300730static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300731 struct v4l2_fmtdesc *fmtdesc)
732{
733 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300734 int i, j, index;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300735 __u32 fmt_tb[8];
736
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300737 /* give an index to each format */
738 index = 0;
739 j = 0;
740 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300741 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300742 j = 0;
743 for (;;) {
744 if (fmt_tb[j] == fmt_tb[index])
745 break;
746 j++;
747 }
748 if (j == index) {
749 if (fmtdesc->index == index)
750 break; /* new format */
751 index++;
Julia Lawall80297122008-11-12 23:18:21 -0300752 if (index >= ARRAY_SIZE(fmt_tb))
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300753 return -EINVAL;
754 }
755 }
756 if (i < 0)
757 return -EINVAL; /* no more format */
758
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300759 fmtdesc->pixelformat = fmt_tb[index];
760 if (gspca_is_compressed(fmt_tb[index]))
761 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
762 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
763 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
764 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
765 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
766 fmtdesc->description[4] = '\0';
767 return 0;
768}
769
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -0300770static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300771 struct v4l2_format *fmt)
772{
773 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300774 int mode;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300775
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300776 mode = gspca_dev->curr_mode;
777 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
778 sizeof fmt->fmt.pix);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300779 return 0;
780}
781
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -0300782static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300783 struct v4l2_format *fmt)
784{
Hans de Goede24c530b2008-07-04 17:55:18 -0300785 int w, h, mode, mode2;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300786
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300787 w = fmt->fmt.pix.width;
788 h = fmt->fmt.pix.height;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300789
Jean-Francois Moine335b3f82008-07-30 04:53:02 -0300790#ifdef GSPCA_DEBUG
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300791 if (gspca_debug & D_CONF)
792 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
793#endif
794 /* search the closest mode for width and height */
795 mode = wxh_to_mode(gspca_dev, w, h);
796
797 /* OK if right palette */
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300798 if (gspca_dev->cam.cam_mode[mode].pixelformat
799 != fmt->fmt.pix.pixelformat) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300800
801 /* else, search the closest mode with the same pixel format */
802 mode2 = gspca_get_mode(gspca_dev, mode,
803 fmt->fmt.pix.pixelformat);
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300804 if (mode2 >= 0)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300805 mode = mode2;
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300806/* else
807 ; * no chance, return this mode */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300808 }
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300809 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
810 sizeof fmt->fmt.pix);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300811 return mode; /* used when s_fmt */
812}
813
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -0300814static int vidioc_try_fmt_vid_cap(struct file *file,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300815 void *priv,
816 struct v4l2_format *fmt)
817{
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300818 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300819 int ret;
820
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -0300821 ret = try_fmt_vid_cap(gspca_dev, fmt);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300822 if (ret < 0)
823 return ret;
824 return 0;
825}
826
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -0300827static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300828 struct v4l2_format *fmt)
829{
830 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300831 int ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300832
Hans de Goedee2997a72008-04-23 08:09:12 -0300833 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
834 return -ERESTARTSYS;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300835
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -0300836 ret = try_fmt_vid_cap(gspca_dev, fmt);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300837 if (ret < 0)
838 goto out;
839
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300840 if (gspca_dev->nframes != 0
841 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
842 ret = -EINVAL;
843 goto out;
844 }
845
Jean-Francois Moine50a871f2008-06-30 19:47:33 -0300846 if (ret == gspca_dev->curr_mode) {
847 ret = 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300848 goto out; /* same mode */
Jean-Francois Moine50a871f2008-06-30 19:47:33 -0300849 }
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300850
851 if (gspca_dev->streaming) {
852 ret = -EBUSY;
853 goto out;
Hans de Goedee2997a72008-04-23 08:09:12 -0300854 }
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300855 gspca_dev->width = fmt->fmt.pix.width;
856 gspca_dev->height = fmt->fmt.pix.height;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300857 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
858 gspca_dev->curr_mode = ret;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300859
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300860 ret = 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300861out:
862 mutex_unlock(&gspca_dev->queue_lock);
863 return ret;
864}
865
Hans de Goeded0182302008-11-19 17:10:47 -0300866static void gspca_release(struct video_device *vfd)
Frank Zago6b060ff2008-09-28 08:12:22 -0300867{
Hans de Goeded0182302008-11-19 17:10:47 -0300868 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
Frank Zago6b060ff2008-09-28 08:12:22 -0300869
Hans de Goeded0182302008-11-19 17:10:47 -0300870 PDEBUG(D_STREAM, "device released");
Frank Zago6b060ff2008-09-28 08:12:22 -0300871
872 kfree(gspca_dev->usb_buf);
873 kfree(gspca_dev);
874}
875
Hans Verkuilbec43662008-12-30 06:58:20 -0300876static int dev_open(struct file *file)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300877{
878 struct gspca_dev *gspca_dev;
879 int ret;
880
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300881 PDEBUG(D_STREAM, "%s open", current->comm);
Jean-Francois Moinea12ca6a2008-11-19 06:37:53 -0300882 gspca_dev = (struct gspca_dev *) video_devdata(file);
Hans de Goedee2997a72008-04-23 08:09:12 -0300883 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
884 return -ERESTARTSYS;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300885 if (!gspca_dev->present) {
886 ret = -ENODEV;
887 goto out;
888 }
889
Jean-Francois Moine012d6b02008-09-03 17:12:16 -0300890 if (gspca_dev->users > 4) { /* (arbitrary value) */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300891 ret = -EBUSY;
892 goto out;
893 }
Jean-Francois Moine5c4fa002008-11-18 15:52:31 -0300894
895 /* protect the subdriver against rmmod */
896 if (!try_module_get(gspca_dev->module)) {
897 ret = -ENODEV;
898 goto out;
899 }
900
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300901 gspca_dev->users++;
Frank Zago6b060ff2008-09-28 08:12:22 -0300902
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300903 file->private_data = gspca_dev;
Jean-Francois Moine335b3f82008-07-30 04:53:02 -0300904#ifdef GSPCA_DEBUG
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300905 /* activate the v4l2 debug */
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300906 if (gspca_debug & D_V4L2)
Jean-Francois Moinea12ca6a2008-11-19 06:37:53 -0300907 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
Frank Zago9de436c2008-09-15 05:20:38 -0300908 | V4L2_DEBUG_IOCTL_ARG;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300909 else
Jean-Francois Moinea12ca6a2008-11-19 06:37:53 -0300910 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
Frank Zago9de436c2008-09-15 05:20:38 -0300911 | V4L2_DEBUG_IOCTL_ARG);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300912#endif
Jean-Francois Moine012d6b02008-09-03 17:12:16 -0300913 ret = 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300914out:
915 mutex_unlock(&gspca_dev->queue_lock);
916 if (ret != 0)
917 PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
918 else
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300919 PDEBUG(D_STREAM, "open done");
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300920 return ret;
921}
922
Hans Verkuilbec43662008-12-30 06:58:20 -0300923static int dev_close(struct file *file)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300924{
925 struct gspca_dev *gspca_dev = file->private_data;
926
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300927 PDEBUG(D_STREAM, "%s close", current->comm);
Hans de Goedee2997a72008-04-23 08:09:12 -0300928 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
929 return -ERESTARTSYS;
930 gspca_dev->users--;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300931
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -0300932 /* if the file did the capture, free the streaming resources */
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300933 if (gspca_dev->capt_file == file) {
Jean-Francois Moinea1e82882008-09-03 17:12:17 -0300934 if (gspca_dev->streaming) {
935 mutex_lock(&gspca_dev->usb_lock);
936 gspca_stream_off(gspca_dev);
937 mutex_unlock(&gspca_dev->usb_lock);
938 }
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300939 frame_free(gspca_dev);
Harvey Harrisonefab8212008-07-05 06:12:47 -0300940 gspca_dev->capt_file = NULL;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300941 gspca_dev->memory = GSPCA_MEMORY_NO;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300942 }
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300943 file->private_data = NULL;
Jean-Francois Moine5c4fa002008-11-18 15:52:31 -0300944 module_put(gspca_dev->module);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300945 mutex_unlock(&gspca_dev->queue_lock);
Frank Zago6b060ff2008-09-28 08:12:22 -0300946
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300947 PDEBUG(D_STREAM, "close done");
Frank Zago6b060ff2008-09-28 08:12:22 -0300948
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300949 return 0;
950}
951
952static int vidioc_querycap(struct file *file, void *priv,
953 struct v4l2_capability *cap)
954{
955 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300956 int ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300957
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300958 /* protect the access to the usb device */
959 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
960 return -ERESTARTSYS;
961 if (!gspca_dev->present) {
962 ret = -ENODEV;
963 goto out;
964 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300965 strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
Jean-Francois Moinec6edaf12008-07-23 03:24:06 -0300966 if (gspca_dev->dev->product != NULL) {
967 strncpy(cap->card, gspca_dev->dev->product,
968 sizeof cap->card);
969 } else {
970 snprintf(cap->card, sizeof cap->card,
971 "USB Camera (%04x:%04x)",
972 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
973 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
974 }
Thierry MERLE59320282009-01-21 15:32:26 -0300975 usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info));
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300976 cap->version = DRIVER_VERSION_NUMBER;
977 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
978 | V4L2_CAP_STREAMING
979 | V4L2_CAP_READWRITE;
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300980 ret = 0;
981out:
982 mutex_unlock(&gspca_dev->usb_lock);
983 return ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300984}
985
Hans de Goedea0001a22009-06-10 04:52:18 -0300986static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev,
987 int id)
988{
989 const struct ctrl *ctrls;
990 int i;
991
992 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
993 i < gspca_dev->sd_desc->nctrls;
994 i++, ctrls++) {
995 if (gspca_dev->ctrl_dis & (1 << i))
996 continue;
997 if (id == ctrls->qctrl.id)
998 return ctrls;
999 }
1000 return NULL;
1001}
1002
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001003static int vidioc_queryctrl(struct file *file, void *priv,
1004 struct v4l2_queryctrl *q_ctrl)
1005{
1006 struct gspca_dev *gspca_dev = priv;
Hans de Goedea0001a22009-06-10 04:52:18 -03001007 const struct ctrl *ctrls;
1008 int i;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001009 u32 id;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001010
Hans de Goedea0001a22009-06-10 04:52:18 -03001011 ctrls = NULL;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001012 id = q_ctrl->id;
1013 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1014 id &= V4L2_CTRL_ID_MASK;
1015 id++;
1016 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
Hans de Goedea0001a22009-06-10 04:52:18 -03001017 if (gspca_dev->ctrl_dis & (1 << i))
Jean-Francois Moinef50ba1b2008-09-03 17:12:14 -03001018 continue;
Hans de Goedea0001a22009-06-10 04:52:18 -03001019 if (ctrls->qctrl.id < id)
Jean-Francois Moinef50ba1b2008-09-03 17:12:14 -03001020 continue;
Hans de Goedea0001a22009-06-10 04:52:18 -03001021 if (ctrls != NULL) {
1022 if (gspca_dev->sd_desc->ctrls[i].qctrl.id
1023 > ctrls->qctrl.id)
1024 continue;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001025 }
Hans de Goedea0001a22009-06-10 04:52:18 -03001026 ctrls = &gspca_dev->sd_desc->ctrls[i];
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001027 }
Hans de Goedea0001a22009-06-10 04:52:18 -03001028 } else {
1029 ctrls = get_ctrl(gspca_dev, id);
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001030 }
Hans de Goedea0001a22009-06-10 04:52:18 -03001031 if (ctrls == NULL)
Jean-Francois Moinef50ba1b2008-09-03 17:12:14 -03001032 return -EINVAL;
Hans de Goedea0001a22009-06-10 04:52:18 -03001033 memcpy(q_ctrl, ctrls, sizeof *q_ctrl);
Jean-Francois Moinef50ba1b2008-09-03 17:12:14 -03001034 return 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001035}
1036
1037static int vidioc_s_ctrl(struct file *file, void *priv,
1038 struct v4l2_control *ctrl)
1039{
1040 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moinea5ae2062008-07-04 11:16:16 -03001041 const struct ctrl *ctrls;
Hans de Goedea0001a22009-06-10 04:52:18 -03001042 int ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001043
Hans de Goedea0001a22009-06-10 04:52:18 -03001044 ctrls = get_ctrl(gspca_dev, ctrl->id);
1045 if (ctrls == NULL)
1046 return -EINVAL;
1047
1048 if (ctrl->value < ctrls->qctrl.minimum
1049 || ctrl->value > ctrls->qctrl.maximum)
1050 return -ERANGE;
1051 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1052 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1053 return -ERESTARTSYS;
1054 if (gspca_dev->present)
1055 ret = ctrls->set(gspca_dev, ctrl->value);
1056 else
1057 ret = -ENODEV;
1058 mutex_unlock(&gspca_dev->usb_lock);
1059 return ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001060}
1061
1062static int vidioc_g_ctrl(struct file *file, void *priv,
1063 struct v4l2_control *ctrl)
1064{
1065 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moinea5ae2062008-07-04 11:16:16 -03001066 const struct ctrl *ctrls;
Hans de Goedea0001a22009-06-10 04:52:18 -03001067 int ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001068
Hans de Goedea0001a22009-06-10 04:52:18 -03001069 ctrls = get_ctrl(gspca_dev, ctrl->id);
1070 if (ctrls == NULL)
1071 return -EINVAL;
1072
1073 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1074 return -ERESTARTSYS;
1075 if (gspca_dev->present)
1076 ret = ctrls->get(gspca_dev, &ctrl->value);
1077 else
1078 ret = -ENODEV;
1079 mutex_unlock(&gspca_dev->usb_lock);
1080 return ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001081}
1082
Jean-Francois Moinef955c4f2008-11-28 08:51:50 -03001083/*fixme: have an audio flag in gspca_dev?*/
1084static int vidioc_s_audio(struct file *file, void *priv,
1085 struct v4l2_audio *audio)
1086{
1087 if (audio->index != 0)
1088 return -EINVAL;
1089 return 0;
1090}
1091
1092static int vidioc_g_audio(struct file *file, void *priv,
1093 struct v4l2_audio *audio)
1094{
Jean-Francois Moinef955c4f2008-11-28 08:51:50 -03001095 strcpy(audio->name, "Microphone");
1096 return 0;
1097}
1098
1099static int vidioc_enumaudio(struct file *file, void *priv,
1100 struct v4l2_audio *audio)
1101{
1102 if (audio->index != 0)
1103 return -EINVAL;
1104
1105 strcpy(audio->name, "Microphone");
1106 audio->capability = 0;
1107 audio->mode = 0;
1108 return 0;
1109}
1110
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001111static int vidioc_querymenu(struct file *file, void *priv,
1112 struct v4l2_querymenu *qmenu)
1113{
1114 struct gspca_dev *gspca_dev = priv;
1115
1116 if (!gspca_dev->sd_desc->querymenu)
1117 return -EINVAL;
1118 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1119}
1120
1121static int vidioc_enum_input(struct file *file, void *priv,
1122 struct v4l2_input *input)
1123{
1124 struct gspca_dev *gspca_dev = priv;
1125
1126 if (input->index != 0)
1127 return -EINVAL;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001128 input->type = V4L2_INPUT_TYPE_CAMERA;
Adam Bakerdfa76fa2009-03-29 19:17:10 -03001129 input->status = gspca_dev->cam.input_flags;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001130 strncpy(input->name, gspca_dev->sd_desc->name,
1131 sizeof input->name);
1132 return 0;
1133}
1134
1135static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1136{
1137 *i = 0;
1138 return 0;
1139}
1140
1141static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1142{
1143 if (i > 0)
1144 return -EINVAL;
1145 return (0);
1146}
1147
1148static int vidioc_reqbufs(struct file *file, void *priv,
1149 struct v4l2_requestbuffers *rb)
1150{
1151 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001152 int i, ret = 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001153
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001154 switch (rb->memory) {
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001155 case GSPCA_MEMORY_READ: /* (internal call) */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001156 case V4L2_MEMORY_MMAP:
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001157 case V4L2_MEMORY_USERPTR:
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001158 break;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001159 default:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001160 return -EINVAL;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001161 }
Hans de Goedee2997a72008-04-23 08:09:12 -03001162 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1163 return -ERESTARTSYS;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001164
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001165 if (gspca_dev->memory != GSPCA_MEMORY_NO
1166 && gspca_dev->memory != rb->memory) {
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001167 ret = -EBUSY;
1168 goto out;
1169 }
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001170
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001171 /* only one file may do the capture */
1172 if (gspca_dev->capt_file != NULL
1173 && gspca_dev->capt_file != file) {
1174 ret = -EBUSY;
1175 goto out;
1176 }
1177
1178 /* if allocated, the buffers must not be mapped */
1179 for (i = 0; i < gspca_dev->nframes; i++) {
1180 if (gspca_dev->frame[i].vma_use_count) {
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001181 ret = -EBUSY;
1182 goto out;
1183 }
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001184 }
1185
1186 /* stop streaming */
1187 if (gspca_dev->streaming) {
1188 mutex_lock(&gspca_dev->usb_lock);
1189 gspca_stream_off(gspca_dev);
1190 mutex_unlock(&gspca_dev->usb_lock);
1191 }
1192
1193 /* free the previous allocated buffers, if any */
1194 if (gspca_dev->nframes != 0) {
1195 frame_free(gspca_dev);
1196 gspca_dev->capt_file = NULL;
1197 }
1198 if (rb->count == 0) /* unrequest */
1199 goto out;
1200 gspca_dev->memory = rb->memory;
1201 ret = frame_alloc(gspca_dev, rb->count);
1202 if (ret == 0) {
1203 rb->count = gspca_dev->nframes;
1204 gspca_dev->capt_file = file;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001205 }
1206out:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001207 mutex_unlock(&gspca_dev->queue_lock);
1208 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1209 return ret;
1210}
1211
1212static int vidioc_querybuf(struct file *file, void *priv,
1213 struct v4l2_buffer *v4l2_buf)
1214{
1215 struct gspca_dev *gspca_dev = priv;
1216 struct gspca_frame *frame;
1217
Jean-Francois Moine13752bd2008-12-19 15:08:51 -03001218 if (v4l2_buf->index < 0
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001219 || v4l2_buf->index >= gspca_dev->nframes)
1220 return -EINVAL;
1221
1222 frame = &gspca_dev->frame[v4l2_buf->index];
1223 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1224 return 0;
1225}
1226
1227static int vidioc_streamon(struct file *file, void *priv,
1228 enum v4l2_buf_type buf_type)
1229{
1230 struct gspca_dev *gspca_dev = priv;
1231 int ret;
1232
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001233 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1234 return -EINVAL;
Hans de Goedee2997a72008-04-23 08:09:12 -03001235 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1236 return -ERESTARTSYS;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001237
Jean-Francois Moine1edabe72008-12-19 15:17:25 -03001238 if (gspca_dev->nframes == 0
1239 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001240 ret = -EINVAL;
1241 goto out;
1242 }
1243 if (!gspca_dev->streaming) {
1244 ret = gspca_init_transfer(gspca_dev);
1245 if (ret < 0)
1246 goto out;
1247 }
Jean-Francois Moine335b3f82008-07-30 04:53:02 -03001248#ifdef GSPCA_DEBUG
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001249 if (gspca_debug & D_STREAM) {
1250 PDEBUG_MODE("stream on OK",
1251 gspca_dev->pixfmt,
1252 gspca_dev->width,
1253 gspca_dev->height);
1254 }
1255#endif
Hans de Goedee2997a72008-04-23 08:09:12 -03001256 ret = 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001257out:
1258 mutex_unlock(&gspca_dev->queue_lock);
1259 return ret;
1260}
1261
1262static int vidioc_streamoff(struct file *file, void *priv,
1263 enum v4l2_buf_type buf_type)
1264{
1265 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001266 int i, ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001267
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001268 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1269 return -EINVAL;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001270 if (!gspca_dev->streaming)
1271 return 0;
1272 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1273 return -ERESTARTSYS;
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001274
1275 /* stop streaming */
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001276 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1277 ret = -ERESTARTSYS;
1278 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001279 }
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001280 gspca_stream_off(gspca_dev);
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001281 mutex_unlock(&gspca_dev->usb_lock);
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001282
1283 /* empty the application queues */
1284 for (i = 0; i < gspca_dev->nframes; i++)
1285 gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
1286 gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
1287 gspca_dev->last_packet_type = DISCARD_PACKET;
1288 gspca_dev->sequence = 0;
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001289 ret = 0;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001290out:
1291 mutex_unlock(&gspca_dev->queue_lock);
1292 return ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001293}
1294
1295static int vidioc_g_jpegcomp(struct file *file, void *priv,
1296 struct v4l2_jpegcompression *jpegcomp)
1297{
1298 struct gspca_dev *gspca_dev = priv;
1299 int ret;
1300
1301 if (!gspca_dev->sd_desc->get_jcomp)
1302 return -EINVAL;
Hans de Goedee2997a72008-04-23 08:09:12 -03001303 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1304 return -ERESTARTSYS;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001305 if (gspca_dev->present)
1306 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1307 else
1308 ret = -ENODEV;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001309 mutex_unlock(&gspca_dev->usb_lock);
1310 return ret;
1311}
1312
1313static int vidioc_s_jpegcomp(struct file *file, void *priv,
1314 struct v4l2_jpegcompression *jpegcomp)
1315{
1316 struct gspca_dev *gspca_dev = priv;
1317 int ret;
1318
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001319 if (!gspca_dev->sd_desc->set_jcomp)
1320 return -EINVAL;
Jim Parisf86d4a92008-12-10 05:50:44 -03001321 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1322 return -ERESTARTSYS;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001323 if (gspca_dev->present)
1324 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1325 else
1326 ret = -ENODEV;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001327 mutex_unlock(&gspca_dev->usb_lock);
1328 return ret;
1329}
1330
1331static int vidioc_g_parm(struct file *filp, void *priv,
1332 struct v4l2_streamparm *parm)
1333{
1334 struct gspca_dev *gspca_dev = priv;
1335
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001336 parm->parm.capture.readbuffers = gspca_dev->nbufread;
Jim Paris627a5ef2008-12-10 06:02:42 -03001337
1338 if (gspca_dev->sd_desc->get_streamparm) {
1339 int ret;
1340
1341 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1342 return -ERESTARTSYS;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001343 if (gspca_dev->present)
1344 ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
1345 parm);
1346 else
1347 ret = -ENODEV;
Jim Paris627a5ef2008-12-10 06:02:42 -03001348 mutex_unlock(&gspca_dev->usb_lock);
1349 return ret;
1350 }
1351
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001352 return 0;
1353}
1354
1355static int vidioc_s_parm(struct file *filp, void *priv,
1356 struct v4l2_streamparm *parm)
1357{
1358 struct gspca_dev *gspca_dev = priv;
1359 int n;
1360
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001361 n = parm->parm.capture.readbuffers;
1362 if (n == 0 || n > GSPCA_MAX_FRAMES)
1363 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1364 else
1365 gspca_dev->nbufread = n;
Jim Paris627a5ef2008-12-10 06:02:42 -03001366
1367 if (gspca_dev->sd_desc->set_streamparm) {
1368 int ret;
1369
1370 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1371 return -ERESTARTSYS;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001372 if (gspca_dev->present)
1373 ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
1374 parm);
1375 else
1376 ret = -ENODEV;
Jim Paris627a5ef2008-12-10 06:02:42 -03001377 mutex_unlock(&gspca_dev->usb_lock);
1378 return ret;
1379 }
1380
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001381 return 0;
1382}
1383
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001384static int vidioc_s_std(struct file *filp, void *priv,
1385 v4l2_std_id *parm)
1386{
1387 return 0;
1388}
1389
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001390#ifdef CONFIG_VIDEO_V4L1_COMPAT
1391static int vidiocgmbuf(struct file *file, void *priv,
1392 struct video_mbuf *mbuf)
1393{
1394 struct gspca_dev *gspca_dev = file->private_data;
1395 int i;
1396
1397 PDEBUG(D_STREAM, "cgmbuf");
1398 if (gspca_dev->nframes == 0) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001399 int ret;
1400
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001401 {
1402 struct v4l2_format fmt;
1403
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001404 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1405 i = gspca_dev->cam.nmodes - 1; /* highest mode */
1406 fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width;
1407 fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height;
1408 fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24;
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03001409 ret = vidioc_s_fmt_vid_cap(file, priv, &fmt);
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001410 if (ret != 0)
1411 return ret;
1412 }
1413 {
1414 struct v4l2_requestbuffers rb;
1415
1416 memset(&rb, 0, sizeof rb);
1417 rb.count = 4;
1418 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1419 rb.memory = V4L2_MEMORY_MMAP;
1420 ret = vidioc_reqbufs(file, priv, &rb);
1421 if (ret != 0)
1422 return ret;
1423 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001424 }
1425 mbuf->frames = gspca_dev->nframes;
1426 mbuf->size = gspca_dev->frsz * gspca_dev->nframes;
1427 for (i = 0; i < mbuf->frames; i++)
1428 mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset;
1429 return 0;
1430}
1431#endif
1432
1433static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1434{
1435 struct gspca_dev *gspca_dev = file->private_data;
Harvey Harrisonefab8212008-07-05 06:12:47 -03001436 struct gspca_frame *frame;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001437 struct page *page;
1438 unsigned long addr, start, size;
1439 int i, ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001440
1441 start = vma->vm_start;
1442 size = vma->vm_end - vma->vm_start;
1443 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1444
Hans de Goedee2997a72008-04-23 08:09:12 -03001445 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1446 return -ERESTARTSYS;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001447 if (!gspca_dev->present) {
1448 ret = -ENODEV;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001449 goto out;
1450 }
1451 if (gspca_dev->capt_file != file) {
1452 ret = -EINVAL;
1453 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001454 }
1455
Harvey Harrisonefab8212008-07-05 06:12:47 -03001456 frame = NULL;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001457 for (i = 0; i < gspca_dev->nframes; ++i) {
1458 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1459 PDEBUG(D_STREAM, "mmap bad memory type");
1460 break;
1461 }
1462 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1463 == vma->vm_pgoff) {
1464 frame = &gspca_dev->frame[i];
1465 break;
1466 }
1467 }
Harvey Harrisonefab8212008-07-05 06:12:47 -03001468 if (frame == NULL) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001469 PDEBUG(D_STREAM, "mmap no frame buffer found");
1470 ret = -EINVAL;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001471 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001472 }
1473#ifdef CONFIG_VIDEO_V4L1_COMPAT
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001474 /* v4l1 maps all the buffers */
1475 if (i != 0
1476 || size != frame->v4l2_buf.length * gspca_dev->nframes)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001477#endif
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001478 if (size != frame->v4l2_buf.length) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001479 PDEBUG(D_STREAM, "mmap bad size");
1480 ret = -EINVAL;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001481 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001482 }
1483
1484 /*
1485 * - VM_IO marks the area as being a mmaped region for I/O to a
1486 * device. It also prevents the region from being core dumped.
1487 */
1488 vma->vm_flags |= VM_IO;
1489
1490 addr = (unsigned long) frame->data;
1491 while (size > 0) {
1492 page = vmalloc_to_page((void *) addr);
1493 ret = vm_insert_page(vma, start, page);
1494 if (ret < 0)
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001495 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001496 start += PAGE_SIZE;
1497 addr += PAGE_SIZE;
1498 size -= PAGE_SIZE;
1499 }
1500
1501 vma->vm_ops = &gspca_vm_ops;
1502 vma->vm_private_data = frame;
1503 gspca_vm_open(vma);
Hans de Goedee2997a72008-04-23 08:09:12 -03001504 ret = 0;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001505out:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001506 mutex_unlock(&gspca_dev->queue_lock);
1507 return ret;
1508}
1509
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001510/*
1511 * wait for a video frame
1512 *
1513 * If a frame is ready, its index is returned.
1514 */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001515static int frame_wait(struct gspca_dev *gspca_dev,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001516 int nonblock_ing)
1517{
1518 struct gspca_frame *frame;
1519 int i, j, ret;
1520
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001521 /* check if a frame is ready */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001522 i = gspca_dev->fr_o;
1523 j = gspca_dev->fr_queue[i];
1524 frame = &gspca_dev->frame[j];
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001525
Hans de Goede181b7042008-11-19 17:16:26 -03001526 if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) {
1527 if (nonblock_ing)
1528 return -EAGAIN;
1529
1530 /* wait till a frame is ready */
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001531 ret = wait_event_interruptible_timeout(gspca_dev->wq,
Hans de Goede181b7042008-11-19 17:16:26 -03001532 (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) ||
1533 !gspca_dev->streaming || !gspca_dev->present,
1534 msecs_to_jiffies(3000));
1535 if (ret < 0)
1536 return ret;
1537 if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present)
Hans de Goedee2997a72008-04-23 08:09:12 -03001538 return -EIO;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001539 }
Hans de Goede181b7042008-11-19 17:16:26 -03001540
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001541 gspca_dev->fr_o = (i + 1) % gspca_dev->nframes;
1542 PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d",
1543 gspca_dev->fr_q,
1544 gspca_dev->fr_i,
1545 gspca_dev->fr_o);
Hans de Goedee2997a72008-04-23 08:09:12 -03001546
Jean-Francois Moine739570b2008-07-14 09:38:29 -03001547 if (gspca_dev->sd_desc->dq_callback) {
1548 mutex_lock(&gspca_dev->usb_lock);
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001549 if (gspca_dev->present)
1550 gspca_dev->sd_desc->dq_callback(gspca_dev);
Jean-Francois Moine739570b2008-07-14 09:38:29 -03001551 mutex_unlock(&gspca_dev->usb_lock);
1552 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001553 return j;
1554}
1555
1556/*
1557 * dequeue a video buffer
1558 *
1559 * If nonblock_ing is false, block until a buffer is available.
1560 */
1561static int vidioc_dqbuf(struct file *file, void *priv,
1562 struct v4l2_buffer *v4l2_buf)
1563{
1564 struct gspca_dev *gspca_dev = priv;
1565 struct gspca_frame *frame;
1566 int i, ret;
1567
1568 PDEBUG(D_FRAM, "dqbuf");
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001569 if (v4l2_buf->memory != gspca_dev->memory)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001570 return -EINVAL;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001571
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001572 if (!gspca_dev->present)
1573 return -ENODEV;
1574
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001575 /* if not streaming, be sure the application will not loop forever */
1576 if (!(file->f_flags & O_NONBLOCK)
1577 && !gspca_dev->streaming && gspca_dev->users == 1)
1578 return -EINVAL;
1579
1580 /* only the capturing file may dequeue */
1581 if (gspca_dev->capt_file != file)
1582 return -EINVAL;
1583
1584 /* only one dequeue / read at a time */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001585 if (mutex_lock_interruptible(&gspca_dev->read_lock))
1586 return -ERESTARTSYS;
1587
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001588 ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001589 if (ret < 0)
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001590 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001591 i = ret; /* frame index */
1592 frame = &gspca_dev->frame[i];
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001593 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
Hans Verkuilc6eb8ea2008-09-03 17:11:54 -03001594 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001595 frame->data,
1596 frame->v4l2_buf.bytesused)) {
1597 PDEBUG(D_ERR|D_STREAM,
1598 "dqbuf cp to user failed");
1599 ret = -EFAULT;
1600 goto out;
1601 }
1602 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001603 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1604 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1605 PDEBUG(D_FRAM, "dqbuf %d", i);
1606 ret = 0;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001607out:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001608 mutex_unlock(&gspca_dev->read_lock);
1609 return ret;
1610}
1611
1612/*
1613 * queue a video buffer
1614 *
1615 * Attempting to queue a buffer that has already been
1616 * queued will return -EINVAL.
1617 */
1618static int vidioc_qbuf(struct file *file, void *priv,
1619 struct v4l2_buffer *v4l2_buf)
1620{
1621 struct gspca_dev *gspca_dev = priv;
1622 struct gspca_frame *frame;
1623 int i, index, ret;
1624
1625 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001626
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001627 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1628 return -ERESTARTSYS;
1629
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001630 index = v4l2_buf->index;
1631 if ((unsigned) index >= gspca_dev->nframes) {
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001632 PDEBUG(D_FRAM,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001633 "qbuf idx %d >= %d", index, gspca_dev->nframes);
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001634 ret = -EINVAL;
1635 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001636 }
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001637 if (v4l2_buf->memory != gspca_dev->memory) {
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001638 PDEBUG(D_FRAM, "qbuf bad memory type");
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001639 ret = -EINVAL;
1640 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001641 }
1642
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001643 frame = &gspca_dev->frame[index];
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001644 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1645 PDEBUG(D_FRAM, "qbuf bad state");
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001646 ret = -EINVAL;
1647 goto out;
1648 }
1649
1650 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001651
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001652 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001653 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
1654 frame->v4l2_buf.length = v4l2_buf->length;
1655 }
1656
1657 /* put the buffer in the 'queued' queue */
1658 i = gspca_dev->fr_q;
1659 gspca_dev->fr_queue[i] = index;
1660 gspca_dev->fr_q = (i + 1) % gspca_dev->nframes;
1661 PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d",
1662 gspca_dev->fr_q,
1663 gspca_dev->fr_i,
1664 gspca_dev->fr_o);
1665
1666 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
1667 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
1668 ret = 0;
1669out:
1670 mutex_unlock(&gspca_dev->queue_lock);
1671 return ret;
1672}
1673
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001674/*
1675 * allocate the resources for read()
1676 */
1677static int read_alloc(struct gspca_dev *gspca_dev,
1678 struct file *file)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001679{
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001680 struct v4l2_buffer v4l2_buf;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001681 int i, ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001682
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001683 PDEBUG(D_STREAM, "read alloc");
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001684 if (gspca_dev->nframes == 0) {
1685 struct v4l2_requestbuffers rb;
1686
1687 memset(&rb, 0, sizeof rb);
1688 rb.count = gspca_dev->nbufread;
1689 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001690 rb.memory = GSPCA_MEMORY_READ;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001691 ret = vidioc_reqbufs(file, gspca_dev, &rb);
1692 if (ret != 0) {
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001693 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001694 return ret;
1695 }
1696 memset(&v4l2_buf, 0, sizeof v4l2_buf);
1697 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001698 v4l2_buf.memory = GSPCA_MEMORY_READ;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001699 for (i = 0; i < gspca_dev->nbufread; i++) {
1700 v4l2_buf.index = i;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001701 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1702 if (ret != 0) {
1703 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
1704 return ret;
1705 }
1706 }
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001707 gspca_dev->memory = GSPCA_MEMORY_READ;
1708 }
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001709
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001710 /* start streaming */
1711 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
1712 if (ret != 0)
1713 PDEBUG(D_STREAM, "read streamon err %d", ret);
1714 return ret;
1715}
1716
1717static unsigned int dev_poll(struct file *file, poll_table *wait)
1718{
1719 struct gspca_dev *gspca_dev = file->private_data;
1720 int i, ret;
1721
1722 PDEBUG(D_FRAM, "poll");
1723
1724 poll_wait(file, &gspca_dev->wq, wait);
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001725
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001726 /* if reqbufs is not done, the user would use read() */
1727 if (gspca_dev->nframes == 0) {
1728 if (gspca_dev->memory != GSPCA_MEMORY_NO)
1729 return POLLERR; /* not the 1st time */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001730 ret = read_alloc(gspca_dev, file);
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001731 if (ret != 0)
1732 return POLLERR;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001733 }
1734
1735 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
1736 return POLLERR;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001737
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001738 /* check the next incoming buffer */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001739 i = gspca_dev->fr_o;
1740 i = gspca_dev->fr_queue[i];
1741 if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
1742 ret = POLLIN | POLLRDNORM; /* something to read */
1743 else
1744 ret = 0;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001745 mutex_unlock(&gspca_dev->queue_lock);
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001746 if (!gspca_dev->present)
1747 return POLLHUP;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001748 return ret;
1749}
1750
1751static ssize_t dev_read(struct file *file, char __user *data,
1752 size_t count, loff_t *ppos)
1753{
1754 struct gspca_dev *gspca_dev = file->private_data;
1755 struct gspca_frame *frame;
1756 struct v4l2_buffer v4l2_buf;
1757 struct timeval timestamp;
Jean-Francois Moine82643d02008-07-02 09:14:56 -03001758 int n, ret, ret2;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001759
Mauro Carvalho Chehaba9e11132008-07-09 05:26:26 -03001760 PDEBUG(D_FRAM, "read (%zd)", count);
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001761 if (!gspca_dev->present)
1762 return -ENODEV;
1763 switch (gspca_dev->memory) {
1764 case GSPCA_MEMORY_NO: /* first time */
1765 ret = read_alloc(gspca_dev, file);
1766 if (ret != 0)
1767 return ret;
1768 break;
1769 case GSPCA_MEMORY_READ:
Jean-Francois Moine82643d02008-07-02 09:14:56 -03001770 if (gspca_dev->capt_file == file)
1771 break;
1772 /* fall thru */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001773 default:
1774 return -EINVAL;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001775 }
1776
1777 /* get a frame */
1778 jiffies_to_timeval(get_jiffies_64(), &timestamp);
1779 timestamp.tv_sec--;
Jean-Francois Moine82643d02008-07-02 09:14:56 -03001780 n = 2;
1781 for (;;) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001782 memset(&v4l2_buf, 0, sizeof v4l2_buf);
1783 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001784 v4l2_buf.memory = GSPCA_MEMORY_READ;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001785 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
1786 if (ret != 0) {
1787 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
1788 return ret;
1789 }
1790
1791 /* if the process slept for more than 1 second,
Frank Zago219423c2008-09-26 07:43:54 -03001792 * get a newer frame */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001793 frame = &gspca_dev->frame[v4l2_buf.index];
Jean-Francois Moine82643d02008-07-02 09:14:56 -03001794 if (--n < 0)
1795 break; /* avoid infinite loop */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001796 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
1797 break;
1798 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1799 if (ret != 0) {
1800 PDEBUG(D_STREAM, "read qbuf err %d", ret);
1801 return ret;
1802 }
1803 }
1804
1805 /* copy the frame */
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001806 if (count > frame->v4l2_buf.bytesused)
1807 count = frame->v4l2_buf.bytesused;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001808 ret = copy_to_user(data, frame->data, count);
1809 if (ret != 0) {
1810 PDEBUG(D_ERR|D_STREAM,
Mauro Carvalho Chehaba9e11132008-07-09 05:26:26 -03001811 "read cp to user lack %d / %zd", ret, count);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001812 ret = -EFAULT;
1813 goto out;
1814 }
1815 ret = count;
1816out:
1817 /* in each case, requeue the buffer */
1818 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
1819 if (ret2 != 0)
1820 return ret2;
1821 return ret;
1822}
1823
Hans Verkuilbec43662008-12-30 06:58:20 -03001824static struct v4l2_file_operations dev_fops = {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001825 .owner = THIS_MODULE,
1826 .open = dev_open,
1827 .release = dev_close,
1828 .read = dev_read,
1829 .mmap = dev_mmap,
Hans Verkuilbec43662008-12-30 06:58:20 -03001830 .unlocked_ioctl = video_ioctl2,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001831 .poll = dev_poll,
1832};
1833
Hans Verkuila3998102008-07-21 02:57:38 -03001834static const struct v4l2_ioctl_ops dev_ioctl_ops = {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001835 .vidioc_querycap = vidioc_querycap,
1836 .vidioc_dqbuf = vidioc_dqbuf,
1837 .vidioc_qbuf = vidioc_qbuf,
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03001838 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1839 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1840 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1841 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001842 .vidioc_streamon = vidioc_streamon,
1843 .vidioc_queryctrl = vidioc_queryctrl,
1844 .vidioc_g_ctrl = vidioc_g_ctrl,
1845 .vidioc_s_ctrl = vidioc_s_ctrl,
Jean-Francois Moinef955c4f2008-11-28 08:51:50 -03001846 .vidioc_g_audio = vidioc_g_audio,
1847 .vidioc_s_audio = vidioc_s_audio,
1848 .vidioc_enumaudio = vidioc_enumaudio,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001849 .vidioc_querymenu = vidioc_querymenu,
1850 .vidioc_enum_input = vidioc_enum_input,
1851 .vidioc_g_input = vidioc_g_input,
1852 .vidioc_s_input = vidioc_s_input,
1853 .vidioc_reqbufs = vidioc_reqbufs,
1854 .vidioc_querybuf = vidioc_querybuf,
1855 .vidioc_streamoff = vidioc_streamoff,
1856 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
1857 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
1858 .vidioc_g_parm = vidioc_g_parm,
1859 .vidioc_s_parm = vidioc_s_parm,
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001860 .vidioc_s_std = vidioc_s_std,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001861#ifdef CONFIG_VIDEO_V4L1_COMPAT
1862 .vidiocgmbuf = vidiocgmbuf,
1863#endif
1864};
1865
Hans Verkuila3998102008-07-21 02:57:38 -03001866static struct video_device gspca_template = {
1867 .name = "gspca main driver",
Hans Verkuila3998102008-07-21 02:57:38 -03001868 .fops = &dev_fops,
1869 .ioctl_ops = &dev_ioctl_ops,
Hans de Goeded0182302008-11-19 17:10:47 -03001870 .release = gspca_release,
Hans Verkuila3998102008-07-21 02:57:38 -03001871 .minor = -1,
1872};
1873
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001874/*
1875 * probe and create a new gspca device
1876 *
1877 * This function must be called by the sub-driver when it is
1878 * called for probing a new device.
1879 */
1880int gspca_dev_probe(struct usb_interface *intf,
1881 const struct usb_device_id *id,
1882 const struct sd_desc *sd_desc,
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001883 int dev_size,
1884 struct module *module)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001885{
1886 struct usb_interface_descriptor *interface;
1887 struct gspca_dev *gspca_dev;
1888 struct usb_device *dev = interface_to_usbdev(intf);
1889 int ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001890
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001891 PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001892
1893 /* we don't handle multi-config cameras */
1894 if (dev->descriptor.bNumConfigurations != 1)
1895 return -ENODEV;
1896 interface = &intf->cur_altsetting->desc;
1897 if (interface->bInterfaceNumber > 0)
1898 return -ENODEV;
1899
1900 /* create the device */
1901 if (dev_size < sizeof *gspca_dev)
1902 dev_size = sizeof *gspca_dev;
1903 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
Erik Andrene293e592008-10-03 08:46:50 -03001904 if (!gspca_dev) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001905 err("couldn't kzalloc gspca struct");
Erik Andrene293e592008-10-03 08:46:50 -03001906 return -ENOMEM;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001907 }
Jean-Francois Moine8295d992008-09-03 17:12:19 -03001908 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
1909 if (!gspca_dev->usb_buf) {
1910 err("out of memory");
Erik Andrene293e592008-10-03 08:46:50 -03001911 ret = -ENOMEM;
Jean-Francois Moine8295d992008-09-03 17:12:19 -03001912 goto out;
1913 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001914 gspca_dev->dev = dev;
1915 gspca_dev->iface = interface->bInterfaceNumber;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001916 gspca_dev->nbalt = intf->num_altsetting;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001917 gspca_dev->sd_desc = sd_desc;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001918 gspca_dev->nbufread = 2;
Jean-Francois Moineff374742008-10-23 07:29:51 -03001919 gspca_dev->empty_packet = -1; /* don't check the empty packets */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001920
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03001921 /* configure the subdriver and initialize the USB device */
Jean-Francois Moineba38ee82008-11-22 04:27:34 -03001922 ret = sd_desc->config(gspca_dev, id);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001923 if (ret < 0)
1924 goto out;
Jean-Francois Moineba38ee82008-11-22 04:27:34 -03001925 ret = sd_desc->init(gspca_dev);
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03001926 if (ret < 0)
1927 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001928 ret = gspca_set_alt0(gspca_dev);
1929 if (ret < 0)
1930 goto out;
1931 gspca_set_default_mode(gspca_dev);
1932
1933 mutex_init(&gspca_dev->usb_lock);
1934 mutex_init(&gspca_dev->read_lock);
1935 mutex_init(&gspca_dev->queue_lock);
1936 init_waitqueue_head(&gspca_dev->wq);
1937
1938 /* init video stuff */
Jean-Francois Moineba38ee82008-11-22 04:27:34 -03001939 memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
Hans de Goede24441632009-03-27 16:08:20 -03001940 gspca_dev->vdev.parent = &intf->dev;
Jean-Francois Moine5c4fa002008-11-18 15:52:31 -03001941 gspca_dev->module = module;
Oliver Neukumee56a4d2008-07-27 14:01:59 -03001942 gspca_dev->present = 1;
Jean-Francois Moinea12ca6a2008-11-19 06:37:53 -03001943 ret = video_register_device(&gspca_dev->vdev,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001944 VFL_TYPE_GRABBER,
Jean-Francois Moine8d584a52009-01-13 06:07:59 -03001945 -1);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001946 if (ret < 0) {
1947 err("video_register_device err %d", ret);
1948 goto out;
1949 }
1950
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001951 usb_set_intfdata(intf, gspca_dev);
1952 PDEBUG(D_PROBE, "probe ok");
1953 return 0;
1954out:
Jean-Francois Moinee07a1d82008-11-19 06:37:53 -03001955 kfree(gspca_dev->usb_buf);
1956 kfree(gspca_dev);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001957 return ret;
1958}
1959EXPORT_SYMBOL(gspca_dev_probe);
1960
1961/*
1962 * USB disconnection
1963 *
1964 * This function must be called by the sub-driver
1965 * when the device disconnects, after the specific resources are freed.
1966 */
1967void gspca_disconnect(struct usb_interface *intf)
1968{
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001969 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001970
Adam Bakerad281272009-02-04 15:33:21 -03001971 mutex_lock(&gspca_dev->usb_lock);
Jean-Francois Moine6e4ae872008-11-22 05:35:49 -03001972 gspca_dev->present = 0;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001973
1974 if (gspca_dev->streaming) {
1975 destroy_urbs(gspca_dev);
1976 wake_up_interruptible(&gspca_dev->wq);
1977 }
1978
1979 /* the device is freed at exit of this function */
1980 gspca_dev->dev = NULL;
Adam Bakerad281272009-02-04 15:33:21 -03001981 mutex_unlock(&gspca_dev->usb_lock);
Jean-Francois Moine6e4ae872008-11-22 05:35:49 -03001982
Frank Zago6b060ff2008-09-28 08:12:22 -03001983 usb_set_intfdata(intf, NULL);
1984
Jean-Francois Moinea12ca6a2008-11-19 06:37:53 -03001985 /* release the device */
1986 /* (this will call gspca_release() immediatly or on last close) */
1987 video_unregister_device(&gspca_dev->vdev);
Jean-Francois Moine3145b8c2008-10-05 04:22:10 -03001988
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001989 PDEBUG(D_PROBE, "disconnect complete");
1990}
1991EXPORT_SYMBOL(gspca_disconnect);
1992
Jean-Francois Moine6a709742008-09-03 16:48:10 -03001993#ifdef CONFIG_PM
1994int gspca_suspend(struct usb_interface *intf, pm_message_t message)
1995{
1996 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
1997
1998 if (!gspca_dev->streaming)
1999 return 0;
2000 gspca_dev->frozen = 1; /* avoid urb error messages */
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03002001 if (gspca_dev->sd_desc->stopN)
2002 gspca_dev->sd_desc->stopN(gspca_dev);
Jean-Francois Moine6a709742008-09-03 16:48:10 -03002003 destroy_urbs(gspca_dev);
2004 gspca_set_alt0(gspca_dev);
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03002005 if (gspca_dev->sd_desc->stop0)
2006 gspca_dev->sd_desc->stop0(gspca_dev);
Jean-Francois Moine6a709742008-09-03 16:48:10 -03002007 return 0;
2008}
2009EXPORT_SYMBOL(gspca_suspend);
2010
2011int gspca_resume(struct usb_interface *intf)
2012{
2013 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2014
2015 gspca_dev->frozen = 0;
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03002016 gspca_dev->sd_desc->init(gspca_dev);
2017 if (gspca_dev->streaming)
2018 return gspca_init_transfer(gspca_dev);
Jean-Francois Moine1e89e2d2008-09-03 17:12:15 -03002019 return 0;
Jean-Francois Moine6a709742008-09-03 16:48:10 -03002020}
2021EXPORT_SYMBOL(gspca_resume);
2022#endif
Hans de Goededcef3232008-07-10 10:40:53 -03002023/* -- cam driver utility functions -- */
2024
2025/* auto gain and exposure algorithm based on the knee algorithm described here:
2026 http://ytse.tricolour.net/docs/LowLightOptimization.html
2027
2028 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2029 where changed. */
2030int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2031 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2032{
2033 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2034 const struct ctrl *gain_ctrl = NULL;
2035 const struct ctrl *exposure_ctrl = NULL;
2036 const struct ctrl *autogain_ctrl = NULL;
2037 int retval = 0;
2038
2039 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
2040 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2041 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2042 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2043 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2044 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2045 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2046 }
2047 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2048 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2049 "on cam without (auto)gain/exposure");
2050 return 0;
2051 }
2052
2053 if (gain_ctrl->get(gspca_dev, &gain) ||
2054 exposure_ctrl->get(gspca_dev, &exposure) ||
2055 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2056 return 0;
2057
2058 orig_gain = gain;
2059 orig_exposure = exposure;
2060
2061 /* If we are of a multiple of deadzone, do multiple steps to reach the
2062 desired lumination fast (with the risc of a slight overshoot) */
2063 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2064
Jean-Francois Moine1c44d812008-11-10 05:56:55 -03002065 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
Hans de Goededcef3232008-07-10 10:40:53 -03002066 avg_lum, desired_avg_lum, steps);
2067
2068 for (i = 0; i < steps; i++) {
2069 if (avg_lum > desired_avg_lum) {
2070 if (gain > gain_knee)
2071 gain--;
2072 else if (exposure > exposure_knee)
2073 exposure--;
2074 else if (gain > gain_ctrl->qctrl.default_value)
2075 gain--;
2076 else if (exposure > exposure_ctrl->qctrl.minimum)
2077 exposure--;
2078 else if (gain > gain_ctrl->qctrl.minimum)
2079 gain--;
2080 else
2081 break;
2082 } else {
2083 if (gain < gain_ctrl->qctrl.default_value)
2084 gain++;
2085 else if (exposure < exposure_knee)
2086 exposure++;
2087 else if (gain < gain_knee)
2088 gain++;
2089 else if (exposure < exposure_ctrl->qctrl.maximum)
2090 exposure++;
2091 else if (gain < gain_ctrl->qctrl.maximum)
2092 gain++;
2093 else
2094 break;
2095 }
2096 }
2097
2098 if (gain != orig_gain) {
2099 gain_ctrl->set(gspca_dev, gain);
2100 retval = 1;
2101 }
2102 if (exposure != orig_exposure) {
2103 exposure_ctrl->set(gspca_dev, exposure);
2104 retval = 1;
2105 }
2106
2107 return retval;
2108}
2109EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2110
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002111/* -- module insert / remove -- */
2112static int __init gspca_init(void)
2113{
Jean-Francois Moinebb64e862008-07-19 06:49:28 -03002114 info("main v%d.%d.%d registered",
2115 (DRIVER_VERSION_NUMBER >> 16) & 0xff,
2116 (DRIVER_VERSION_NUMBER >> 8) & 0xff,
2117 DRIVER_VERSION_NUMBER & 0xff);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002118 return 0;
2119}
2120static void __exit gspca_exit(void)
2121{
2122 info("main deregistered");
2123}
2124
2125module_init(gspca_init);
2126module_exit(gspca_exit);
2127
Jean-Francois Moine335b3f82008-07-30 04:53:02 -03002128#ifdef GSPCA_DEBUG
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002129module_param_named(debug, gspca_debug, int, 0644);
2130MODULE_PARM_DESC(debug,
2131 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002132 " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout"
2133 " 0x0100: v4l2");
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03002134#endif