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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 *
Márton Németh0274d422010-01-28 06:39:49 -03006 * Camera button input handling by Márton Németh
7 * Copyright (C) 2009-2010 Márton Németh <nm127@freemail.hu>
8 *
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03009 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 * for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#define MODULE_NAME "gspca"
25
26#include <linux/init.h>
Jean-Francois Moinecf0fe082008-10-17 04:36:47 -030027#include <linux/version.h>
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030028#include <linux/fs.h>
29#include <linux/vmalloc.h>
30#include <linux/sched.h>
31#include <linux/slab.h>
32#include <linux/mm.h>
33#include <linux/string.h>
34#include <linux/pagemap.h>
Jean-Francois Moine956e42d2008-07-01 10:03:42 -030035#include <linux/io.h>
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030036#include <asm/page.h>
Jean-Francois Moine956e42d2008-07-01 10:03:42 -030037#include <linux/uaccess.h>
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030038#include <linux/jiffies.h>
Hans Verkuil35ea11f2008-07-20 08:12:02 -030039#include <media/v4l2-ioctl.h>
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030040
41#include "gspca.h"
42
Jean-François Moinee070bf92010-02-18 15:02:51 -030043#ifdef CONFIG_INPUT
Márton Németh0274d422010-01-28 06:39:49 -030044#include <linux/input.h>
45#include <linux/usb/input.h>
Jean-François Moinee070bf92010-02-18 15:02:51 -030046#endif
Márton Németh0274d422010-01-28 06:39:49 -030047
Jean-Francois Moined43fa322008-06-12 10:58:58 -030048/* global values */
Jean-Francois Moine8fee8452009-01-17 04:46:38 -030049#define DEF_NURBS 3 /* default number of URBs */
50#if DEF_NURBS > MAX_NURBS
51#error "DEF_NURBS too big"
52#endif
Jean-Francois Moined43fa322008-06-12 10:58:58 -030053
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030054MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
55MODULE_DESCRIPTION("GSPCA USB Camera Driver");
56MODULE_LICENSE("GPL");
57
Jean-François Moine55461f42010-01-30 16:03:02 -030058#define DRIVER_VERSION_NUMBER KERNEL_VERSION(2, 9, 0)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030059
Jean-Francois Moine335b3f82008-07-30 04:53:02 -030060#ifdef GSPCA_DEBUG
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030061int gspca_debug = D_ERR | D_PROBE;
62EXPORT_SYMBOL(gspca_debug);
63
64static void PDEBUG_MODE(char *txt, __u32 pixfmt, int w, int h)
65{
66 if ((pixfmt >> 24) >= '0' && (pixfmt >> 24) <= 'z') {
67 PDEBUG(D_CONF|D_STREAM, "%s %c%c%c%c %dx%d",
68 txt,
69 pixfmt & 0xff,
70 (pixfmt >> 8) & 0xff,
71 (pixfmt >> 16) & 0xff,
72 pixfmt >> 24,
73 w, h);
74 } else {
75 PDEBUG(D_CONF|D_STREAM, "%s 0x%08x %dx%d",
76 txt,
77 pixfmt,
78 w, h);
79 }
80}
81#else
82#define PDEBUG_MODE(txt, pixfmt, w, h)
83#endif
84
Jean-Francois Moine77ee3312009-11-07 15:30:50 -030085/* specific memory types - !! should be different from V4L2_MEMORY_xxx */
Jean-Francois Moined43fa322008-06-12 10:58:58 -030086#define GSPCA_MEMORY_NO 0 /* V4L2_MEMORY_xxx starts from 1 */
87#define GSPCA_MEMORY_READ 7
88
Jean-Francois Moined43fa322008-06-12 10:58:58 -030089#define BUF_ALL_FLAGS (V4L2_BUF_FLAG_QUEUED | V4L2_BUF_FLAG_DONE)
Jean-Francois Moined43fa322008-06-12 10:58:58 -030090
Jean-Francois Moine63eb9542008-04-12 09:58:09 -030091/*
92 * VMA operations.
93 */
94static void gspca_vm_open(struct vm_area_struct *vma)
95{
96 struct gspca_frame *frame = vma->vm_private_data;
97
98 frame->vma_use_count++;
99 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_MAPPED;
100}
101
102static void gspca_vm_close(struct vm_area_struct *vma)
103{
104 struct gspca_frame *frame = vma->vm_private_data;
105
106 if (--frame->vma_use_count <= 0)
107 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_MAPPED;
108}
109
Alexey Dobriyanf0f37e22009-09-27 22:29:37 +0400110static const struct vm_operations_struct gspca_vm_ops = {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300111 .open = gspca_vm_open,
112 .close = gspca_vm_close,
113};
114
Márton Németh0274d422010-01-28 06:39:49 -0300115/*
116 * Input and interrupt endpoint handling functions
117 */
118#ifdef CONFIG_INPUT
119static void int_irq(struct urb *urb)
120{
121 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
122 int ret;
123
124 ret = urb->status;
125 switch (ret) {
126 case 0:
127 if (gspca_dev->sd_desc->int_pkt_scan(gspca_dev,
128 urb->transfer_buffer, urb->actual_length) < 0) {
129 PDEBUG(D_ERR, "Unknown packet received");
130 }
131 break;
132
133 case -ENOENT:
134 case -ECONNRESET:
135 case -ENODEV:
136 case -ESHUTDOWN:
137 /* Stop is requested either by software or hardware is gone,
138 * keep the ret value non-zero and don't resubmit later.
139 */
140 break;
141
142 default:
143 PDEBUG(D_ERR, "URB error %i, resubmitting", urb->status);
144 urb->status = 0;
145 ret = 0;
146 }
147
148 if (ret == 0) {
149 ret = usb_submit_urb(urb, GFP_ATOMIC);
150 if (ret < 0)
151 PDEBUG(D_ERR, "Resubmit URB failed with error %i", ret);
152 }
153}
154
155static int gspca_input_connect(struct gspca_dev *dev)
156{
157 struct input_dev *input_dev;
158 int err = 0;
159
160 dev->input_dev = NULL;
Hans de Goedeac82f592010-02-19 04:28:39 -0300161 if (dev->sd_desc->int_pkt_scan || dev->sd_desc->other_input) {
Márton Németh0274d422010-01-28 06:39:49 -0300162 input_dev = input_allocate_device();
163 if (!input_dev)
164 return -ENOMEM;
165
166 usb_make_path(dev->dev, dev->phys, sizeof(dev->phys));
167 strlcat(dev->phys, "/input0", sizeof(dev->phys));
168
169 input_dev->name = dev->sd_desc->name;
170 input_dev->phys = dev->phys;
171
172 usb_to_input_id(dev->dev, &input_dev->id);
173
174 input_dev->evbit[0] = BIT_MASK(EV_KEY);
175 input_dev->keybit[BIT_WORD(KEY_CAMERA)] = BIT_MASK(KEY_CAMERA);
176 input_dev->dev.parent = &dev->dev->dev;
177
178 err = input_register_device(input_dev);
179 if (err) {
180 PDEBUG(D_ERR, "Input device registration failed "
181 "with error %i", err);
182 input_dev->dev.parent = NULL;
183 input_free_device(input_dev);
184 } else {
185 dev->input_dev = input_dev;
186 }
187 } else
188 err = -EINVAL;
189
190 return err;
191}
192
193static int alloc_and_submit_int_urb(struct gspca_dev *gspca_dev,
194 struct usb_endpoint_descriptor *ep)
195{
196 unsigned int buffer_len;
197 int interval;
198 struct urb *urb;
199 struct usb_device *dev;
200 void *buffer = NULL;
201 int ret = -EINVAL;
202
203 buffer_len = ep->wMaxPacketSize;
204 interval = ep->bInterval;
205 PDEBUG(D_PROBE, "found int in endpoint: 0x%x, "
206 "buffer_len=%u, interval=%u",
207 ep->bEndpointAddress, buffer_len, interval);
208
209 dev = gspca_dev->dev;
210
211 urb = usb_alloc_urb(0, GFP_KERNEL);
212 if (!urb) {
213 ret = -ENOMEM;
214 goto error;
215 }
216
217 buffer = usb_buffer_alloc(dev, ep->wMaxPacketSize,
218 GFP_KERNEL, &urb->transfer_dma);
219 if (!buffer) {
220 ret = -ENOMEM;
221 goto error_buffer;
222 }
223 usb_fill_int_urb(urb, dev,
224 usb_rcvintpipe(dev, ep->bEndpointAddress),
225 buffer, buffer_len,
226 int_irq, (void *)gspca_dev, interval);
227 gspca_dev->int_urb = urb;
228 ret = usb_submit_urb(urb, GFP_KERNEL);
229 if (ret < 0) {
230 PDEBUG(D_ERR, "submit URB failed with error %i", ret);
231 goto error_submit;
232 }
233 return ret;
234
235error_submit:
236 usb_buffer_free(dev,
237 urb->transfer_buffer_length,
238 urb->transfer_buffer,
239 urb->transfer_dma);
240error_buffer:
241 usb_free_urb(urb);
242error:
243 return ret;
244}
245
246static int gspca_input_create_urb(struct gspca_dev *gspca_dev)
247{
248 int ret = -EINVAL;
249 struct usb_interface *intf;
250 struct usb_host_interface *intf_desc;
251 struct usb_endpoint_descriptor *ep;
252 int i;
253
254 if (gspca_dev->sd_desc->int_pkt_scan) {
255 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
256 intf_desc = intf->cur_altsetting;
257 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
258 ep = &intf_desc->endpoint[i].desc;
259 if (usb_endpoint_dir_in(ep) &&
260 usb_endpoint_xfer_int(ep)) {
261
262 ret = alloc_and_submit_int_urb(gspca_dev, ep);
263 break;
264 }
265 }
266 }
267 return ret;
268}
269
270static void gspca_input_destroy_urb(struct gspca_dev *gspca_dev)
271{
272 struct urb *urb;
273
274 urb = gspca_dev->int_urb;
275 if (urb) {
276 gspca_dev->int_urb = NULL;
277 usb_kill_urb(urb);
278 usb_buffer_free(gspca_dev->dev,
279 urb->transfer_buffer_length,
280 urb->transfer_buffer,
281 urb->transfer_dma);
282 usb_free_urb(urb);
283 }
284}
285#else
286#define gspca_input_connect(gspca_dev) 0
287#define gspca_input_create_urb(gspca_dev) 0
288#define gspca_input_destroy_urb(gspca_dev)
289#endif
290
Jean-Francois Moine1b60e1a2008-09-20 05:44:21 -0300291/* get the current input frame buffer */
292struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev)
293{
294 struct gspca_frame *frame;
Jean-Francois Moine1b60e1a2008-09-20 05:44:21 -0300295
Jean-Francois Moinedb870872009-12-15 05:16:04 -0300296 frame = gspca_dev->cur_frame;
Jean-Francois Moine1b60e1a2008-09-20 05:44:21 -0300297 if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
298 != V4L2_BUF_FLAG_QUEUED)
299 return NULL;
300 return frame;
301}
302EXPORT_SYMBOL(gspca_get_i_frame);
303
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300304/*
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300305 * fill a video frame from an URB and resubmit
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300306 */
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300307static void fill_frame(struct gspca_dev *gspca_dev,
308 struct urb *urb)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300309{
Jean-Francois Moine8d584a52009-01-13 06:07:59 -0300310 u8 *data; /* address of data in the iso message */
Jean-Francois Moine1b60e1a2008-09-20 05:44:21 -0300311 int i, len, st;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300312 cam_pkt_op pkt_scan;
313
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300314 if (urb->status != 0) {
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300315 if (urb->status == -ESHUTDOWN)
316 return; /* disconnection */
Jean-Francois Moine62ee8ee2008-09-03 17:12:13 -0300317#ifdef CONFIG_PM
Hans de Goede6a540bd2009-10-24 15:02:14 -0300318 if (gspca_dev->frozen)
319 return;
Jean-Francois Moine62ee8ee2008-09-03 17:12:13 -0300320#endif
Hans de Goede6a540bd2009-10-24 15:02:14 -0300321 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
Jean-Francois Moine81578522009-11-13 07:15:08 -0300322 urb->status = 0;
Hans de Goedebf926ad2009-10-23 06:56:06 -0300323 goto resubmit;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300324 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300325 pkt_scan = gspca_dev->sd_desc->pkt_scan;
326 for (i = 0; i < urb->number_of_packets; i++) {
327
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300328 /* check the packet status and length */
329 len = urb->iso_frame_desc[i].actual_length;
Jean-Francois Moineff374742008-10-23 07:29:51 -0300330 if (len == 0) {
331 if (gspca_dev->empty_packet == 0)
332 gspca_dev->empty_packet = 1;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300333 continue;
Jean-Francois Moineff374742008-10-23 07:29:51 -0300334 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300335 st = urb->iso_frame_desc[i].status;
336 if (st) {
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300337 PDEBUG(D_ERR,
338 "ISOC data error: [%d] len=%d, status=%d",
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300339 i, len, st);
340 gspca_dev->last_packet_type = DISCARD_PACKET;
341 continue;
342 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300343
344 /* let the packet be analyzed by the subdriver */
345 PDEBUG(D_PACK, "packet [%d] o:%d l:%d",
346 i, urb->iso_frame_desc[i].offset, len);
Jean-Francois Moine8d584a52009-01-13 06:07:59 -0300347 data = (u8 *) urb->transfer_buffer
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300348 + urb->iso_frame_desc[i].offset;
Jean-Francois Moine76dd2722009-11-13 09:21:03 -0300349 pkt_scan(gspca_dev, data, len);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300350 }
351
Hans de Goedebf926ad2009-10-23 06:56:06 -0300352resubmit:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300353 /* resubmit the URB */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300354 st = usb_submit_urb(urb, GFP_ATOMIC);
355 if (st < 0)
356 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
357}
358
359/*
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300360 * ISOC message interrupt from the USB device
361 *
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300362 * Analyse each packet and call the subdriver for copy to the frame buffer.
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300363 */
Jean-Francois Moine8d584a52009-01-13 06:07:59 -0300364static void isoc_irq(struct urb *urb)
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300365{
366 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
367
Hans de Goede3647fea2008-07-15 05:36:30 -0300368 PDEBUG(D_PACK, "isoc irq");
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300369 if (!gspca_dev->streaming)
370 return;
371 fill_frame(gspca_dev, urb);
372}
373
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300374/*
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300375 * bulk message interrupt from the USB device
376 */
Jean-Francois Moine8d584a52009-01-13 06:07:59 -0300377static void bulk_irq(struct urb *urb)
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300378{
379 struct gspca_dev *gspca_dev = (struct gspca_dev *) urb->context;
Antonio Ospitedff369a2008-11-14 07:53:32 -0300380 int st;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300381
382 PDEBUG(D_PACK, "bulk irq");
383 if (!gspca_dev->streaming)
384 return;
Jean-Francois Moine880ae242008-11-18 04:19:52 -0300385 switch (urb->status) {
386 case 0:
387 break;
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300388 case -ESHUTDOWN:
389 return; /* disconnection */
Jean-Francois Moine880ae242008-11-18 04:19:52 -0300390 default:
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300391#ifdef CONFIG_PM
Hans de Goede6a540bd2009-10-24 15:02:14 -0300392 if (gspca_dev->frozen)
393 return;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300394#endif
Hans de Goede6a540bd2009-10-24 15:02:14 -0300395 PDEBUG(D_ERR|D_PACK, "urb status: %d", urb->status);
Jean-Francois Moine81578522009-11-13 07:15:08 -0300396 urb->status = 0;
Hans de Goedebf926ad2009-10-23 06:56:06 -0300397 goto resubmit;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300398 }
399
Jean-Francois Moined131c3c2009-11-13 08:16:02 -0300400 PDEBUG(D_PACK, "packet l:%d", urb->actual_length);
401 gspca_dev->sd_desc->pkt_scan(gspca_dev,
Jean-Francois Moined131c3c2009-11-13 08:16:02 -0300402 urb->transfer_buffer,
403 urb->actual_length);
Antonio Ospitedff369a2008-11-14 07:53:32 -0300404
Hans de Goedebf926ad2009-10-23 06:56:06 -0300405resubmit:
Antonio Ospitedff369a2008-11-14 07:53:32 -0300406 /* resubmit the URB */
407 if (gspca_dev->cam.bulk_nurbs != 0) {
408 st = usb_submit_urb(urb, GFP_ATOMIC);
409 if (st < 0)
410 PDEBUG(D_ERR|D_PACK, "usb_submit_urb() ret %d", st);
411 }
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300412}
413
414/*
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300415 * add data to the current frame
416 *
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300417 * This function is called by the subdrivers at interrupt level.
418 *
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300419 * To build a frame, these ones must add
420 * - one FIRST_PACKET
421 * - 0 or many INTER_PACKETs
422 * - one LAST_PACKET
423 * DISCARD_PACKET invalidates the whole frame.
424 * On LAST_PACKET, a new frame is returned.
425 */
Jean-Francois Moine76dd2722009-11-13 09:21:03 -0300426void gspca_frame_add(struct gspca_dev *gspca_dev,
427 enum gspca_packet_type packet_type,
428 const u8 *data,
429 int len)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300430{
Jean-Francois Moine3ec342f2009-11-13 07:38:16 -0300431 struct gspca_frame *frame;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300432 int i, j;
433
Hans de Goedee2997a72008-04-23 08:09:12 -0300434 PDEBUG(D_PACK, "add t:%d l:%d", packet_type, len);
Jean-Francois Moined131c3c2009-11-13 08:16:02 -0300435
436 /* check the availability of the frame buffer */
Jean-Francois Moine3ec342f2009-11-13 07:38:16 -0300437 frame = gspca_dev->cur_frame;
Jean-Francois Moined131c3c2009-11-13 08:16:02 -0300438 if ((frame->v4l2_buf.flags & BUF_ALL_FLAGS)
439 != V4L2_BUF_FLAG_QUEUED) {
440 gspca_dev->last_packet_type = DISCARD_PACKET;
Jean-Francois Moine76dd2722009-11-13 09:21:03 -0300441 return;
Jean-Francois Moined131c3c2009-11-13 08:16:02 -0300442 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300443
444 /* when start of a new frame, if the current frame buffer
445 * is not queued, discard the whole frame */
446 if (packet_type == FIRST_PACKET) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300447 frame->data_end = frame->data;
448 jiffies_to_timeval(get_jiffies_64(),
449 &frame->v4l2_buf.timestamp);
450 frame->v4l2_buf.sequence = ++gspca_dev->sequence;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300451 } else if (gspca_dev->last_packet_type == DISCARD_PACKET) {
Jean-Francois Moine06ca78f2008-07-22 03:45:08 -0300452 if (packet_type == LAST_PACKET)
453 gspca_dev->last_packet_type = packet_type;
Jean-Francois Moine76dd2722009-11-13 09:21:03 -0300454 return;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300455 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300456
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300457 /* append the packet to the frame buffer */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300458 if (len > 0) {
459 if (frame->data_end - frame->data + len
460 > frame->v4l2_buf.length) {
Mauro Carvalho Chehaba9e11132008-07-09 05:26:26 -0300461 PDEBUG(D_ERR|D_PACK, "frame overflow %zd > %d",
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300462 frame->data_end - frame->data + len,
463 frame->v4l2_buf.length);
464 packet_type = DISCARD_PACKET;
465 } else {
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300466 memcpy(frame->data_end, data, len);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300467 frame->data_end += len;
468 }
469 }
470 gspca_dev->last_packet_type = packet_type;
471
Frank Zago219423c2008-09-26 07:43:54 -0300472 /* if last packet, wake up the application and advance in the queue */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300473 if (packet_type == LAST_PACKET) {
474 frame->v4l2_buf.bytesused = frame->data_end - frame->data;
475 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_QUEUED;
476 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_DONE;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300477 wake_up_interruptible(&gspca_dev->wq); /* event = new frame */
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300478 i = (gspca_dev->fr_i + 1) % gspca_dev->nframes;
479 gspca_dev->fr_i = i;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300480 PDEBUG(D_FRAM, "frame complete len:%d q:%d i:%d o:%d",
481 frame->v4l2_buf.bytesused,
482 gspca_dev->fr_q,
483 i,
484 gspca_dev->fr_o);
485 j = gspca_dev->fr_queue[i];
Jean-Francois Moine76dd2722009-11-13 09:21:03 -0300486 gspca_dev->cur_frame = &gspca_dev->frame[j];
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300487 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300488}
489EXPORT_SYMBOL(gspca_frame_add);
490
491static int gspca_is_compressed(__u32 format)
492{
493 switch (format) {
494 case V4L2_PIX_FMT_MJPEG:
495 case V4L2_PIX_FMT_JPEG:
Jean-Francois Moine50a871f2008-06-30 19:47:33 -0300496 case V4L2_PIX_FMT_SPCA561:
Hans de Goedeab8f12c2008-07-04 18:29:32 -0300497 case V4L2_PIX_FMT_PAC207:
Kyle Guinnd661e622009-01-16 05:36:14 -0300498 case V4L2_PIX_FMT_MR97310A:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300499 return 1;
500 }
501 return 0;
502}
503
Jean-Francois Moined50e2572009-11-26 15:36:40 -0300504static void *rvmalloc(long size)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300505{
506 void *mem;
507 unsigned long adr;
508
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300509 mem = vmalloc_32(size);
Harvey Harrisonefab8212008-07-05 06:12:47 -0300510 if (mem != NULL) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300511 adr = (unsigned long) mem;
Jean-Francois Moined50e2572009-11-26 15:36:40 -0300512 while (size > 0) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300513 SetPageReserved(vmalloc_to_page((void *) adr));
514 adr += PAGE_SIZE;
515 size -= PAGE_SIZE;
516 }
517 }
518 return mem;
519}
520
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300521static void rvfree(void *mem, long size)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300522{
523 unsigned long adr;
524
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300525 adr = (unsigned long) mem;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300526 while (size > 0) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300527 ClearPageReserved(vmalloc_to_page((void *) adr));
528 adr += PAGE_SIZE;
529 size -= PAGE_SIZE;
530 }
531 vfree(mem);
532}
533
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300534static int frame_alloc(struct gspca_dev *gspca_dev,
535 unsigned int count)
536{
537 struct gspca_frame *frame;
538 unsigned int frsz;
539 int i;
540
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300541 i = gspca_dev->curr_mode;
542 frsz = gspca_dev->cam.cam_mode[i].sizeimage;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300543 PDEBUG(D_STREAM, "frame alloc frsz: %d", frsz);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300544 frsz = PAGE_ALIGN(frsz);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300545 gspca_dev->frsz = frsz;
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300546 if (count > GSPCA_MAX_FRAMES)
547 count = GSPCA_MAX_FRAMES;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300548 gspca_dev->frbuf = rvmalloc(frsz * count);
549 if (!gspca_dev->frbuf) {
550 err("frame alloc failed");
551 return -ENOMEM;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300552 }
553 gspca_dev->nframes = count;
554 for (i = 0; i < count; i++) {
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300555 frame = &gspca_dev->frame[i];
556 frame->v4l2_buf.index = i;
557 frame->v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
558 frame->v4l2_buf.flags = 0;
559 frame->v4l2_buf.field = V4L2_FIELD_NONE;
560 frame->v4l2_buf.length = frsz;
561 frame->v4l2_buf.memory = gspca_dev->memory;
562 frame->v4l2_buf.sequence = 0;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300563 frame->data = frame->data_end =
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300564 gspca_dev->frbuf + i * frsz;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -0300565 frame->v4l2_buf.m.offset = i * frsz;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300566 }
567 gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
Jean-Francois Moine3ec342f2009-11-13 07:38:16 -0300568 gspca_dev->cur_frame = &gspca_dev->frame[0];
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300569 gspca_dev->last_packet_type = DISCARD_PACKET;
570 gspca_dev->sequence = 0;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300571 return 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300572}
573
574static void frame_free(struct gspca_dev *gspca_dev)
575{
576 int i;
577
578 PDEBUG(D_STREAM, "frame free");
Harvey Harrisonefab8212008-07-05 06:12:47 -0300579 if (gspca_dev->frbuf != NULL) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300580 rvfree(gspca_dev->frbuf,
581 gspca_dev->nframes * gspca_dev->frsz);
582 gspca_dev->frbuf = NULL;
583 for (i = 0; i < gspca_dev->nframes; i++)
584 gspca_dev->frame[i].data = NULL;
585 }
586 gspca_dev->nframes = 0;
587}
588
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300589static void destroy_urbs(struct gspca_dev *gspca_dev)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300590{
591 struct urb *urb;
592 unsigned int i;
593
594 PDEBUG(D_STREAM, "kill transfer");
Erik Andrén44732812008-10-13 15:52:46 -0300595 for (i = 0; i < MAX_NURBS; i++) {
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300596 urb = gspca_dev->urb[i];
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300597 if (urb == NULL)
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300598 break;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300599
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300600 gspca_dev->urb[i] = NULL;
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300601 usb_kill_urb(urb);
Harvey Harrisonefab8212008-07-05 06:12:47 -0300602 if (urb->transfer_buffer != NULL)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300603 usb_buffer_free(gspca_dev->dev,
604 urb->transfer_buffer_length,
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300605 urb->transfer_buffer,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300606 urb->transfer_dma);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300607 usb_free_urb(urb);
608 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300609}
610
611/*
Frank Zago219423c2008-09-26 07:43:54 -0300612 * look for an input transfer endpoint in an alternate setting
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300613 */
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300614static struct usb_host_endpoint *alt_xfer(struct usb_host_interface *alt,
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300615 int xfer)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300616{
617 struct usb_host_endpoint *ep;
618 int i, attr;
619
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300620 for (i = 0; i < alt->desc.bNumEndpoints; i++) {
621 ep = &alt->endpoint[i];
Jean-Francois Moine50e06de2008-12-31 08:13:46 -0300622 attr = ep->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
Jean-Francois Moine30d35e42009-04-21 13:57:31 -0300623 if (attr == xfer
624 && ep->desc.wMaxPacketSize != 0)
Jean-Francois Moine50e06de2008-12-31 08:13:46 -0300625 return ep;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300626 }
627 return NULL;
628}
629
630/*
Frank Zago219423c2008-09-26 07:43:54 -0300631 * look for an input (isoc or bulk) endpoint
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300632 *
633 * The endpoint is defined by the subdriver.
634 * Use only the first isoc (some Zoran - 0x0572:0x0001 - have two such ep).
635 * This routine may be called many times when the bandwidth is too small
636 * (the bandwidth is checked on urb submit).
637 */
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300638static struct usb_host_endpoint *get_ep(struct gspca_dev *gspca_dev)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300639{
640 struct usb_interface *intf;
641 struct usb_host_endpoint *ep;
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300642 int xfer, i, ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300643
644 intf = usb_ifnum_to_if(gspca_dev->dev, gspca_dev->iface);
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300645 ep = NULL;
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300646 xfer = gspca_dev->cam.bulk ? USB_ENDPOINT_XFER_BULK
647 : USB_ENDPOINT_XFER_ISOC;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300648 i = gspca_dev->alt; /* previous alt setting */
Hans de Goedea511ba92009-10-16 07:13:07 -0300649 if (gspca_dev->cam.reverse_alts) {
650 while (++i < gspca_dev->nbalt) {
651 ep = alt_xfer(&intf->altsetting[i], xfer);
652 if (ep)
653 break;
654 }
655 } else {
656 while (--i >= 0) {
657 ep = alt_xfer(&intf->altsetting[i], xfer);
658 if (ep)
659 break;
660 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300661 }
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -0300662 if (ep == NULL) {
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300663 err("no transfer endpoint found");
664 return NULL;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300665 }
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300666 PDEBUG(D_STREAM, "use alt %d ep 0x%02x",
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300667 i, ep->desc.bEndpointAddress);
Jean-Francois Moine1c8336d2009-07-28 04:38:25 -0300668 gspca_dev->alt = i; /* memorize the current alt setting */
Jean-Francois Moine8dd07ef2009-04-21 14:05:44 -0300669 if (gspca_dev->nbalt > 1) {
Márton Németh0274d422010-01-28 06:39:49 -0300670 gspca_input_destroy_urb(gspca_dev);
Jean-Francois Moine95d91422008-09-29 05:57:32 -0300671 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, i);
672 if (ret < 0) {
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300673 err("set alt %d err %d", i, ret);
Márton Németh0274d422010-01-28 06:39:49 -0300674 ep = NULL;
Jean-Francois Moine95d91422008-09-29 05:57:32 -0300675 }
Márton Németh0274d422010-01-28 06:39:49 -0300676 gspca_input_create_urb(gspca_dev);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300677 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300678 return ep;
679}
680
681/*
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300682 * create the URBs for image transfer
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300683 */
684static int create_urbs(struct gspca_dev *gspca_dev,
685 struct usb_host_endpoint *ep)
686{
687 struct urb *urb;
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300688 int n, nurbs, i, psize, npkt, bsize;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300689
690 /* calculate the packet size and the number of packets */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300691 psize = le16_to_cpu(ep->desc.wMaxPacketSize);
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300692
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300693 if (!gspca_dev->cam.bulk) { /* isoc */
Jean-Francois Moine95d91422008-09-29 05:57:32 -0300694
695 /* See paragraph 5.9 / table 5-11 of the usb 2.0 spec. */
Jean-Francois Moine1f53b0b2009-06-30 07:07:01 -0300696 if (gspca_dev->pkt_size == 0)
697 psize = (psize & 0x07ff) * (1 + ((psize >> 11) & 3));
698 else
699 psize = gspca_dev->pkt_size;
Jean-Francois Moine49cb6b02009-04-25 13:29:01 -0300700 npkt = gspca_dev->cam.npkt;
701 if (npkt == 0)
702 npkt = 32; /* default value */
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300703 bsize = psize * npkt;
704 PDEBUG(D_STREAM,
705 "isoc %d pkts size %d = bsize:%d",
706 npkt, psize, bsize);
Jean-Francois Moine51977a82008-09-08 03:22:42 -0300707 nurbs = DEF_NURBS;
Jean-Francois Moine95d91422008-09-29 05:57:32 -0300708 } else { /* bulk */
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300709 npkt = 0;
Antonio Ospitedff369a2008-11-14 07:53:32 -0300710 bsize = gspca_dev->cam.bulk_size;
Jean-Francois Moine95d91422008-09-29 05:57:32 -0300711 if (bsize == 0)
712 bsize = psize;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300713 PDEBUG(D_STREAM, "bulk bsize:%d", bsize);
Antonio Ospitedff369a2008-11-14 07:53:32 -0300714 if (gspca_dev->cam.bulk_nurbs != 0)
715 nurbs = gspca_dev->cam.bulk_nurbs;
716 else
717 nurbs = 1;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300718 }
719
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300720 for (n = 0; n < nurbs; n++) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300721 urb = usb_alloc_urb(npkt, GFP_KERNEL);
722 if (!urb) {
723 err("usb_alloc_urb failed");
724 return -ENOMEM;
725 }
Jean-Francois Moinedb870872009-12-15 05:16:04 -0300726 gspca_dev->urb[n] = urb;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300727 urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300728 bsize,
729 GFP_KERNEL,
730 &urb->transfer_dma);
731
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -0300732 if (urb->transfer_buffer == NULL) {
Jean-Francois Moinedb870872009-12-15 05:16:04 -0300733 err("usb_buffer_alloc failed");
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300734 return -ENOMEM;
735 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300736 urb->dev = gspca_dev->dev;
737 urb->context = gspca_dev;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300738 urb->transfer_buffer_length = bsize;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300739 if (npkt != 0) { /* ISOC */
740 urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
741 ep->desc.bEndpointAddress);
Frank Zago6c49da72008-09-28 07:43:00 -0300742 urb->transfer_flags = URB_ISO_ASAP
743 | URB_NO_TRANSFER_DMA_MAP;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300744 urb->interval = ep->desc.bInterval;
745 urb->complete = isoc_irq;
746 urb->number_of_packets = npkt;
747 for (i = 0; i < npkt; i++) {
748 urb->iso_frame_desc[i].length = psize;
749 urb->iso_frame_desc[i].offset = psize * i;
750 }
751 } else { /* bulk */
752 urb->pipe = usb_rcvbulkpipe(gspca_dev->dev,
753 ep->desc.bEndpointAddress),
Frank Zago6c49da72008-09-28 07:43:00 -0300754 urb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
Jean-Francois Moine0be01002008-09-04 07:01:50 -0300755 urb->complete = bulk_irq;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300756 }
757 }
758 return 0;
759}
760
761/*
762 * start the USB transfer
763 */
764static int gspca_init_transfer(struct gspca_dev *gspca_dev)
765{
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300766 struct usb_host_endpoint *ep;
Jean-Francois Moinedb870872009-12-15 05:16:04 -0300767 struct urb *urb;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300768 int n, ret;
769
Hans de Goedee2997a72008-04-23 08:09:12 -0300770 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
771 return -ERESTARTSYS;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300772
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300773 if (!gspca_dev->present) {
774 ret = -ENODEV;
775 goto out;
776 }
777
Jean-Francois Moineab6c8cf2010-01-13 15:34:27 -0300778 gspca_dev->usb_err = 0;
779
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300780 /* set the higher alternate setting and
781 * loop until urb submit succeeds */
Hans de Goedea511ba92009-10-16 07:13:07 -0300782 if (gspca_dev->cam.reverse_alts)
783 gspca_dev->alt = 0;
784 else
785 gspca_dev->alt = gspca_dev->nbalt;
786
Jean-Francois Moine1f53b0b2009-06-30 07:07:01 -0300787 if (gspca_dev->sd_desc->isoc_init) {
788 ret = gspca_dev->sd_desc->isoc_init(gspca_dev);
789 if (ret < 0)
790 goto out;
791 }
792 ep = get_ep(gspca_dev);
793 if (ep == NULL) {
794 ret = -EIO;
795 goto out;
796 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300797 for (;;) {
Jean-Francois Moine47aaca92009-12-15 05:23:04 -0300798 if (!gspca_dev->cam.no_urb_create) {
799 PDEBUG(D_STREAM, "init transfer alt %d",
800 gspca_dev->alt);
801 ret = create_urbs(gspca_dev, ep);
802 if (ret < 0) {
803 destroy_urbs(gspca_dev);
804 goto out;
805 }
Jean-Francois Moinedb870872009-12-15 05:16:04 -0300806 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300807
Jean-Francois Moine8fe2f1d2008-10-22 14:51:56 -0300808 /* clear the bulk endpoint */
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300809 if (gspca_dev->cam.bulk)
Jean-Francois Moine8fe2f1d2008-10-22 14:51:56 -0300810 usb_clear_halt(gspca_dev->dev,
Jean-Francois Moine50e06de2008-12-31 08:13:46 -0300811 gspca_dev->urb[0]->pipe);
Jean-Francois Moine8fe2f1d2008-10-22 14:51:56 -0300812
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300813 /* start the cam */
Jean-Francois Moine72ab97c2008-09-20 06:39:08 -0300814 ret = gspca_dev->sd_desc->start(gspca_dev);
815 if (ret < 0) {
816 destroy_urbs(gspca_dev);
817 goto out;
818 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300819 gspca_dev->streaming = 1;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300820
Antonio Ospitedff369a2008-11-14 07:53:32 -0300821 /* some bulk transfers are started by the subdriver */
Jean-Francois Moine6929dc62009-04-21 13:45:56 -0300822 if (gspca_dev->cam.bulk && gspca_dev->cam.bulk_nurbs == 0)
Jean-Francois Moine51977a82008-09-08 03:22:42 -0300823 break;
824
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300825 /* submit the URBs */
Jean-Francois Moinedb870872009-12-15 05:16:04 -0300826 for (n = 0; n < MAX_NURBS; n++) {
827 urb = gspca_dev->urb[n];
828 if (urb == NULL)
829 break;
830 ret = usb_submit_urb(urb, GFP_KERNEL);
Jean-Francois Moine1f53b0b2009-06-30 07:07:01 -0300831 if (ret < 0)
832 break;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300833 }
834 if (ret >= 0)
835 break;
Jean-Francois Moine1f53b0b2009-06-30 07:07:01 -0300836 gspca_dev->streaming = 0;
837 destroy_urbs(gspca_dev);
Jean-Francois Moine4bdf4a82009-11-10 14:49:43 -0300838 if (ret != -ENOSPC) {
839 PDEBUG(D_ERR|D_STREAM,
840 "usb_submit_urb alt %d err %d",
841 gspca_dev->alt, ret);
Jean-Francois Moine1f53b0b2009-06-30 07:07:01 -0300842 goto out;
Jean-Francois Moine4bdf4a82009-11-10 14:49:43 -0300843 }
Jean-Francois Moine1f53b0b2009-06-30 07:07:01 -0300844
845 /* the bandwidth is not wide enough
846 * negociate or try a lower alternate setting */
Jean-Francois Moine4bdf4a82009-11-10 14:49:43 -0300847 PDEBUG(D_ERR|D_STREAM,
848 "bandwidth not wide enough - trying again");
Jean-Francois Moine1f53b0b2009-06-30 07:07:01 -0300849 msleep(20); /* wait for kill complete */
850 if (gspca_dev->sd_desc->isoc_nego) {
851 ret = gspca_dev->sd_desc->isoc_nego(gspca_dev);
852 if (ret < 0)
853 goto out;
854 } else {
855 ep = get_ep(gspca_dev);
856 if (ep == NULL) {
857 ret = -EIO;
858 goto out;
859 }
860 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300861 }
862out:
863 mutex_unlock(&gspca_dev->usb_lock);
864 return ret;
865}
866
867static int gspca_set_alt0(struct gspca_dev *gspca_dev)
868{
869 int ret;
870
Jean-Francois Moine8dd07ef2009-04-21 14:05:44 -0300871 if (gspca_dev->alt == 0)
872 return 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300873 ret = usb_set_interface(gspca_dev->dev, gspca_dev->iface, 0);
874 if (ret < 0)
Jean-Francois Moinef955c4f2008-11-28 08:51:50 -0300875 PDEBUG(D_ERR|D_STREAM, "set alt 0 err %d", ret);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300876 return ret;
877}
878
Frank Zago219423c2008-09-26 07:43:54 -0300879/* Note: both the queue and the usb locks should be held when calling this */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300880static void gspca_stream_off(struct gspca_dev *gspca_dev)
881{
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300882 gspca_dev->streaming = 0;
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300883 if (gspca_dev->present) {
884 if (gspca_dev->sd_desc->stopN)
885 gspca_dev->sd_desc->stopN(gspca_dev);
886 destroy_urbs(gspca_dev);
Márton Németh0274d422010-01-28 06:39:49 -0300887 gspca_input_destroy_urb(gspca_dev);
Jean-Francois Moined08e2ce2009-01-20 16:21:44 -0300888 gspca_set_alt0(gspca_dev);
Márton Németh0274d422010-01-28 06:39:49 -0300889 gspca_input_create_urb(gspca_dev);
Jean-Francois Moine090264e2009-02-12 08:05:45 -0300890 }
891
892 /* always call stop0 to free the subdriver's resources */
Jean-Francois Moine98522a72008-11-18 06:33:08 -0300893 if (gspca_dev->sd_desc->stop0)
894 gspca_dev->sd_desc->stop0(gspca_dev);
895 PDEBUG(D_STREAM, "stream off OK");
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300896}
897
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300898static void gspca_set_default_mode(struct gspca_dev *gspca_dev)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300899{
900 int i;
901
902 i = gspca_dev->cam.nmodes - 1; /* take the highest mode */
903 gspca_dev->curr_mode = i;
904 gspca_dev->width = gspca_dev->cam.cam_mode[i].width;
905 gspca_dev->height = gspca_dev->cam.cam_mode[i].height;
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300906 gspca_dev->pixfmt = gspca_dev->cam.cam_mode[i].pixelformat;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300907}
908
909static int wxh_to_mode(struct gspca_dev *gspca_dev,
910 int width, int height)
911{
912 int i;
913
Jean-Francois Moined43fa322008-06-12 10:58:58 -0300914 for (i = gspca_dev->cam.nmodes; --i > 0; ) {
915 if (width >= gspca_dev->cam.cam_mode[i].width
916 && height >= gspca_dev->cam.cam_mode[i].height)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300917 break;
918 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300919 return i;
920}
921
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300922/*
923 * search a mode with the right pixel format
924 */
925static int gspca_get_mode(struct gspca_dev *gspca_dev,
926 int mode,
927 int pixfmt)
928{
929 int modeU, modeD;
930
931 modeU = modeD = mode;
932 while ((modeU < gspca_dev->cam.nmodes) || modeD >= 0) {
933 if (--modeD >= 0) {
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300934 if (gspca_dev->cam.cam_mode[modeD].pixelformat
935 == pixfmt)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300936 return modeD;
937 }
938 if (++modeU < gspca_dev->cam.nmodes) {
Jean-Francois Moinec2446b32008-07-05 11:49:20 -0300939 if (gspca_dev->cam.cam_mode[modeU].pixelformat
940 == pixfmt)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -0300941 return modeU;
942 }
943 }
944 return -EINVAL;
945}
946
Brian Johnsonaf1d9af2009-07-19 05:29:20 -0300947#ifdef CONFIG_VIDEO_ADV_DEBUG
948static int vidioc_g_register(struct file *file, void *priv,
949 struct v4l2_dbg_register *reg)
950{
951 int ret;
952 struct gspca_dev *gspca_dev = priv;
953
954 if (!gspca_dev->sd_desc->get_chip_ident)
955 return -EINVAL;
956
957 if (!gspca_dev->sd_desc->get_register)
958 return -EINVAL;
959
960 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
961 return -ERESTARTSYS;
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -0300962 gspca_dev->usb_err = 0;
Brian Johnsonaf1d9af2009-07-19 05:29:20 -0300963 if (gspca_dev->present)
964 ret = gspca_dev->sd_desc->get_register(gspca_dev, reg);
965 else
966 ret = -ENODEV;
967 mutex_unlock(&gspca_dev->usb_lock);
968
969 return ret;
970}
971
972static int vidioc_s_register(struct file *file, void *priv,
973 struct v4l2_dbg_register *reg)
974{
975 int ret;
976 struct gspca_dev *gspca_dev = priv;
977
978 if (!gspca_dev->sd_desc->get_chip_ident)
979 return -EINVAL;
980
981 if (!gspca_dev->sd_desc->set_register)
982 return -EINVAL;
983
984 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
985 return -ERESTARTSYS;
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -0300986 gspca_dev->usb_err = 0;
Brian Johnsonaf1d9af2009-07-19 05:29:20 -0300987 if (gspca_dev->present)
988 ret = gspca_dev->sd_desc->set_register(gspca_dev, reg);
989 else
990 ret = -ENODEV;
991 mutex_unlock(&gspca_dev->usb_lock);
992
993 return ret;
994}
995#endif
996
997static int vidioc_g_chip_ident(struct file *file, void *priv,
998 struct v4l2_dbg_chip_ident *chip)
999{
1000 int ret;
1001 struct gspca_dev *gspca_dev = priv;
1002
1003 if (!gspca_dev->sd_desc->get_chip_ident)
1004 return -EINVAL;
1005
1006 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1007 return -ERESTARTSYS;
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001008 gspca_dev->usb_err = 0;
Brian Johnsonaf1d9af2009-07-19 05:29:20 -03001009 if (gspca_dev->present)
1010 ret = gspca_dev->sd_desc->get_chip_ident(gspca_dev, chip);
1011 else
1012 ret = -ENODEV;
1013 mutex_unlock(&gspca_dev->usb_lock);
1014
1015 return ret;
1016}
1017
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03001018static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001019 struct v4l2_fmtdesc *fmtdesc)
1020{
1021 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001022 int i, j, index;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001023 __u32 fmt_tb[8];
1024
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001025 /* give an index to each format */
1026 index = 0;
1027 j = 0;
1028 for (i = gspca_dev->cam.nmodes; --i >= 0; ) {
Jean-Francois Moinec2446b32008-07-05 11:49:20 -03001029 fmt_tb[index] = gspca_dev->cam.cam_mode[i].pixelformat;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001030 j = 0;
1031 for (;;) {
1032 if (fmt_tb[j] == fmt_tb[index])
1033 break;
1034 j++;
1035 }
1036 if (j == index) {
1037 if (fmtdesc->index == index)
1038 break; /* new format */
1039 index++;
Julia Lawall80297122008-11-12 23:18:21 -03001040 if (index >= ARRAY_SIZE(fmt_tb))
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001041 return -EINVAL;
1042 }
1043 }
1044 if (i < 0)
1045 return -EINVAL; /* no more format */
1046
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001047 fmtdesc->pixelformat = fmt_tb[index];
1048 if (gspca_is_compressed(fmt_tb[index]))
1049 fmtdesc->flags = V4L2_FMT_FLAG_COMPRESSED;
1050 fmtdesc->description[0] = fmtdesc->pixelformat & 0xff;
1051 fmtdesc->description[1] = (fmtdesc->pixelformat >> 8) & 0xff;
1052 fmtdesc->description[2] = (fmtdesc->pixelformat >> 16) & 0xff;
1053 fmtdesc->description[3] = fmtdesc->pixelformat >> 24;
1054 fmtdesc->description[4] = '\0';
1055 return 0;
1056}
1057
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03001058static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001059 struct v4l2_format *fmt)
1060{
1061 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moinec2446b32008-07-05 11:49:20 -03001062 int mode;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001063
Jean-Francois Moinec2446b32008-07-05 11:49:20 -03001064 mode = gspca_dev->curr_mode;
1065 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1066 sizeof fmt->fmt.pix);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001067 return 0;
1068}
1069
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03001070static int try_fmt_vid_cap(struct gspca_dev *gspca_dev,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001071 struct v4l2_format *fmt)
1072{
Hans de Goede24c530b2008-07-04 17:55:18 -03001073 int w, h, mode, mode2;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001074
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001075 w = fmt->fmt.pix.width;
1076 h = fmt->fmt.pix.height;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001077
Jean-Francois Moine335b3f82008-07-30 04:53:02 -03001078#ifdef GSPCA_DEBUG
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001079 if (gspca_debug & D_CONF)
1080 PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
1081#endif
1082 /* search the closest mode for width and height */
1083 mode = wxh_to_mode(gspca_dev, w, h);
1084
1085 /* OK if right palette */
Jean-Francois Moinec2446b32008-07-05 11:49:20 -03001086 if (gspca_dev->cam.cam_mode[mode].pixelformat
1087 != fmt->fmt.pix.pixelformat) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001088
1089 /* else, search the closest mode with the same pixel format */
1090 mode2 = gspca_get_mode(gspca_dev, mode,
1091 fmt->fmt.pix.pixelformat);
Jean-Francois Moinec2446b32008-07-05 11:49:20 -03001092 if (mode2 >= 0)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001093 mode = mode2;
Jean-Francois Moinec2446b32008-07-05 11:49:20 -03001094/* else
1095 ; * no chance, return this mode */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001096 }
Jean-Francois Moinec2446b32008-07-05 11:49:20 -03001097 memcpy(&fmt->fmt.pix, &gspca_dev->cam.cam_mode[mode],
1098 sizeof fmt->fmt.pix);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001099 return mode; /* used when s_fmt */
1100}
1101
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03001102static int vidioc_try_fmt_vid_cap(struct file *file,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001103 void *priv,
1104 struct v4l2_format *fmt)
1105{
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001106 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001107 int ret;
1108
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03001109 ret = try_fmt_vid_cap(gspca_dev, fmt);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001110 if (ret < 0)
1111 return ret;
1112 return 0;
1113}
1114
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03001115static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001116 struct v4l2_format *fmt)
1117{
1118 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001119 int ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001120
Hans de Goedee2997a72008-04-23 08:09:12 -03001121 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1122 return -ERESTARTSYS;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001123
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03001124 ret = try_fmt_vid_cap(gspca_dev, fmt);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001125 if (ret < 0)
1126 goto out;
1127
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001128 if (gspca_dev->nframes != 0
1129 && fmt->fmt.pix.sizeimage > gspca_dev->frsz) {
1130 ret = -EINVAL;
1131 goto out;
1132 }
1133
Jean-Francois Moine50a871f2008-06-30 19:47:33 -03001134 if (ret == gspca_dev->curr_mode) {
1135 ret = 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001136 goto out; /* same mode */
Jean-Francois Moine50a871f2008-06-30 19:47:33 -03001137 }
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001138
1139 if (gspca_dev->streaming) {
1140 ret = -EBUSY;
1141 goto out;
Hans de Goedee2997a72008-04-23 08:09:12 -03001142 }
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001143 gspca_dev->width = fmt->fmt.pix.width;
1144 gspca_dev->height = fmt->fmt.pix.height;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001145 gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
1146 gspca_dev->curr_mode = ret;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001147
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001148 ret = 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001149out:
1150 mutex_unlock(&gspca_dev->queue_lock);
1151 return ret;
1152}
1153
Hans de Goede11c635a2009-05-25 15:04:22 -03001154static int vidioc_enum_framesizes(struct file *file, void *priv,
1155 struct v4l2_frmsizeenum *fsize)
1156{
1157 struct gspca_dev *gspca_dev = priv;
1158 int i;
1159 __u32 index = 0;
1160
1161 for (i = 0; i < gspca_dev->cam.nmodes; i++) {
1162 if (fsize->pixel_format !=
1163 gspca_dev->cam.cam_mode[i].pixelformat)
1164 continue;
1165
1166 if (fsize->index == index) {
1167 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1168 fsize->discrete.width =
1169 gspca_dev->cam.cam_mode[i].width;
1170 fsize->discrete.height =
1171 gspca_dev->cam.cam_mode[i].height;
1172 return 0;
1173 }
1174 index++;
1175 }
1176
1177 return -EINVAL;
1178}
1179
Antonio Ospite28ffe772009-12-02 06:18:46 -03001180static int vidioc_enum_frameintervals(struct file *filp, void *priv,
1181 struct v4l2_frmivalenum *fival)
1182{
1183 struct gspca_dev *gspca_dev = priv;
1184 int mode = wxh_to_mode(gspca_dev, fival->width, fival->height);
1185 __u32 i;
1186
1187 if (gspca_dev->cam.mode_framerates == NULL ||
1188 gspca_dev->cam.mode_framerates[mode].nrates == 0)
1189 return -EINVAL;
1190
1191 if (fival->pixel_format !=
1192 gspca_dev->cam.cam_mode[mode].pixelformat)
1193 return -EINVAL;
1194
1195 for (i = 0; i < gspca_dev->cam.mode_framerates[mode].nrates; i++) {
1196 if (fival->index == i) {
1197 fival->type = V4L2_FRMSIZE_TYPE_DISCRETE;
1198 fival->discrete.numerator = 1;
1199 fival->discrete.denominator =
1200 gspca_dev->cam.mode_framerates[mode].rates[i];
1201 return 0;
1202 }
1203 }
1204
1205 return -EINVAL;
1206}
1207
Hans de Goeded0182302008-11-19 17:10:47 -03001208static void gspca_release(struct video_device *vfd)
Frank Zago6b060ff2008-09-28 08:12:22 -03001209{
Hans de Goeded0182302008-11-19 17:10:47 -03001210 struct gspca_dev *gspca_dev = container_of(vfd, struct gspca_dev, vdev);
Frank Zago6b060ff2008-09-28 08:12:22 -03001211
Laurent Pinchart38c7c032009-11-27 13:57:15 -03001212 PDEBUG(D_PROBE, "%s released",
1213 video_device_node_name(&gspca_dev->vdev));
Frank Zago6b060ff2008-09-28 08:12:22 -03001214
1215 kfree(gspca_dev->usb_buf);
1216 kfree(gspca_dev);
1217}
1218
Hans Verkuilbec43662008-12-30 06:58:20 -03001219static int dev_open(struct file *file)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001220{
1221 struct gspca_dev *gspca_dev;
1222 int ret;
1223
Jean-Francois Moine0d07e242009-10-01 13:44:49 -03001224 PDEBUG(D_STREAM, "[%s] open", current->comm);
Jean-Francois Moinea12ca6a2008-11-19 06:37:53 -03001225 gspca_dev = (struct gspca_dev *) video_devdata(file);
Hans de Goedee2997a72008-04-23 08:09:12 -03001226 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1227 return -ERESTARTSYS;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001228 if (!gspca_dev->present) {
1229 ret = -ENODEV;
1230 goto out;
1231 }
1232
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03001233 if (gspca_dev->users > 4) { /* (arbitrary value) */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001234 ret = -EBUSY;
1235 goto out;
1236 }
Jean-Francois Moine5c4fa002008-11-18 15:52:31 -03001237
1238 /* protect the subdriver against rmmod */
1239 if (!try_module_get(gspca_dev->module)) {
1240 ret = -ENODEV;
1241 goto out;
1242 }
1243
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001244 gspca_dev->users++;
Frank Zago6b060ff2008-09-28 08:12:22 -03001245
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001246 file->private_data = gspca_dev;
Jean-Francois Moine335b3f82008-07-30 04:53:02 -03001247#ifdef GSPCA_DEBUG
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001248 /* activate the v4l2 debug */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001249 if (gspca_debug & D_V4L2)
Jean-Francois Moinea12ca6a2008-11-19 06:37:53 -03001250 gspca_dev->vdev.debug |= V4L2_DEBUG_IOCTL
Frank Zago9de436c2008-09-15 05:20:38 -03001251 | V4L2_DEBUG_IOCTL_ARG;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001252 else
Jean-Francois Moinea12ca6a2008-11-19 06:37:53 -03001253 gspca_dev->vdev.debug &= ~(V4L2_DEBUG_IOCTL
Frank Zago9de436c2008-09-15 05:20:38 -03001254 | V4L2_DEBUG_IOCTL_ARG);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001255#endif
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03001256 ret = 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001257out:
1258 mutex_unlock(&gspca_dev->queue_lock);
1259 if (ret != 0)
1260 PDEBUG(D_ERR|D_STREAM, "open failed err %d", ret);
1261 else
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001262 PDEBUG(D_STREAM, "open done");
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001263 return ret;
1264}
1265
Hans Verkuilbec43662008-12-30 06:58:20 -03001266static int dev_close(struct file *file)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001267{
1268 struct gspca_dev *gspca_dev = file->private_data;
1269
Jean-Francois Moine0d07e242009-10-01 13:44:49 -03001270 PDEBUG(D_STREAM, "[%s] close", current->comm);
Hans de Goedee2997a72008-04-23 08:09:12 -03001271 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1272 return -ERESTARTSYS;
1273 gspca_dev->users--;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001274
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001275 /* if the file did the capture, free the streaming resources */
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001276 if (gspca_dev->capt_file == file) {
Jean-Francois Moinea1e82882008-09-03 17:12:17 -03001277 if (gspca_dev->streaming) {
1278 mutex_lock(&gspca_dev->usb_lock);
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001279 gspca_dev->usb_err = 0;
Jean-Francois Moinea1e82882008-09-03 17:12:17 -03001280 gspca_stream_off(gspca_dev);
1281 mutex_unlock(&gspca_dev->usb_lock);
1282 }
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001283 frame_free(gspca_dev);
Harvey Harrisonefab8212008-07-05 06:12:47 -03001284 gspca_dev->capt_file = NULL;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001285 gspca_dev->memory = GSPCA_MEMORY_NO;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001286 }
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001287 file->private_data = NULL;
Jean-Francois Moine5c4fa002008-11-18 15:52:31 -03001288 module_put(gspca_dev->module);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001289 mutex_unlock(&gspca_dev->queue_lock);
Frank Zago6b060ff2008-09-28 08:12:22 -03001290
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001291 PDEBUG(D_STREAM, "close done");
Frank Zago6b060ff2008-09-28 08:12:22 -03001292
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001293 return 0;
1294}
1295
1296static int vidioc_querycap(struct file *file, void *priv,
1297 struct v4l2_capability *cap)
1298{
1299 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001300 int ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001301
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001302 /* protect the access to the usb device */
1303 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1304 return -ERESTARTSYS;
1305 if (!gspca_dev->present) {
1306 ret = -ENODEV;
1307 goto out;
1308 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001309 strncpy(cap->driver, gspca_dev->sd_desc->name, sizeof cap->driver);
Jean-Francois Moinec6edaf12008-07-23 03:24:06 -03001310 if (gspca_dev->dev->product != NULL) {
1311 strncpy(cap->card, gspca_dev->dev->product,
1312 sizeof cap->card);
1313 } else {
1314 snprintf(cap->card, sizeof cap->card,
1315 "USB Camera (%04x:%04x)",
1316 le16_to_cpu(gspca_dev->dev->descriptor.idVendor),
1317 le16_to_cpu(gspca_dev->dev->descriptor.idProduct));
1318 }
Thierry MERLE59320282009-01-21 15:32:26 -03001319 usb_make_path(gspca_dev->dev, cap->bus_info, sizeof(cap->bus_info));
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001320 cap->version = DRIVER_VERSION_NUMBER;
1321 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE
1322 | V4L2_CAP_STREAMING
1323 | V4L2_CAP_READWRITE;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001324 ret = 0;
1325out:
1326 mutex_unlock(&gspca_dev->usb_lock);
1327 return ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001328}
1329
Hans de Goedea0001a22009-06-10 04:52:18 -03001330static const struct ctrl *get_ctrl(struct gspca_dev *gspca_dev,
1331 int id)
1332{
1333 const struct ctrl *ctrls;
1334 int i;
1335
1336 for (i = 0, ctrls = gspca_dev->sd_desc->ctrls;
1337 i < gspca_dev->sd_desc->nctrls;
1338 i++, ctrls++) {
1339 if (gspca_dev->ctrl_dis & (1 << i))
1340 continue;
1341 if (id == ctrls->qctrl.id)
1342 return ctrls;
1343 }
1344 return NULL;
1345}
1346
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001347static int vidioc_queryctrl(struct file *file, void *priv,
1348 struct v4l2_queryctrl *q_ctrl)
1349{
1350 struct gspca_dev *gspca_dev = priv;
Hans de Goedea0001a22009-06-10 04:52:18 -03001351 const struct ctrl *ctrls;
1352 int i;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001353 u32 id;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001354
Hans de Goedea0001a22009-06-10 04:52:18 -03001355 ctrls = NULL;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001356 id = q_ctrl->id;
1357 if (id & V4L2_CTRL_FLAG_NEXT_CTRL) {
1358 id &= V4L2_CTRL_ID_MASK;
1359 id++;
1360 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
Hans de Goedea0001a22009-06-10 04:52:18 -03001361 if (gspca_dev->ctrl_dis & (1 << i))
Jean-Francois Moinef50ba1b2008-09-03 17:12:14 -03001362 continue;
Hans de Goedeb8bfb5f2009-06-13 18:56:22 -03001363 if (gspca_dev->sd_desc->ctrls[i].qctrl.id < id)
Jean-Francois Moinef50ba1b2008-09-03 17:12:14 -03001364 continue;
Hans de Goedeb8bfb5f2009-06-13 18:56:22 -03001365 if (ctrls && gspca_dev->sd_desc->ctrls[i].qctrl.id
Hans de Goedea0001a22009-06-10 04:52:18 -03001366 > ctrls->qctrl.id)
Hans de Goedeb8bfb5f2009-06-13 18:56:22 -03001367 continue;
Hans de Goedea0001a22009-06-10 04:52:18 -03001368 ctrls = &gspca_dev->sd_desc->ctrls[i];
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001369 }
Jean-Francois Moine83955552009-12-12 06:58:01 -03001370 if (ctrls == NULL)
1371 return -EINVAL;
Hans de Goedea0001a22009-06-10 04:52:18 -03001372 } else {
1373 ctrls = get_ctrl(gspca_dev, id);
Jean-Francois Moine83955552009-12-12 06:58:01 -03001374 if (ctrls == NULL)
1375 return -EINVAL;
Jean-Francois Moine4af85662009-11-12 15:59:27 -03001376 i = ctrls - gspca_dev->sd_desc->ctrls;
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001377 }
Hans de Goedea0001a22009-06-10 04:52:18 -03001378 memcpy(q_ctrl, ctrls, sizeof *q_ctrl);
Jean-Francois Moine4af85662009-11-12 15:59:27 -03001379 if (gspca_dev->ctrl_inac & (1 << i))
1380 q_ctrl->flags |= V4L2_CTRL_FLAG_INACTIVE;
Jean-Francois Moinef50ba1b2008-09-03 17:12:14 -03001381 return 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001382}
1383
1384static int vidioc_s_ctrl(struct file *file, void *priv,
1385 struct v4l2_control *ctrl)
1386{
1387 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moinea5ae2062008-07-04 11:16:16 -03001388 const struct ctrl *ctrls;
Hans de Goedea0001a22009-06-10 04:52:18 -03001389 int ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001390
Hans de Goedea0001a22009-06-10 04:52:18 -03001391 ctrls = get_ctrl(gspca_dev, ctrl->id);
1392 if (ctrls == NULL)
1393 return -EINVAL;
1394
1395 if (ctrl->value < ctrls->qctrl.minimum
1396 || ctrl->value > ctrls->qctrl.maximum)
1397 return -ERANGE;
1398 PDEBUG(D_CONF, "set ctrl [%08x] = %d", ctrl->id, ctrl->value);
1399 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1400 return -ERESTARTSYS;
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001401 gspca_dev->usb_err = 0;
Hans de Goedea0001a22009-06-10 04:52:18 -03001402 if (gspca_dev->present)
1403 ret = ctrls->set(gspca_dev, ctrl->value);
1404 else
1405 ret = -ENODEV;
1406 mutex_unlock(&gspca_dev->usb_lock);
1407 return ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001408}
1409
1410static int vidioc_g_ctrl(struct file *file, void *priv,
1411 struct v4l2_control *ctrl)
1412{
1413 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moinea5ae2062008-07-04 11:16:16 -03001414 const struct ctrl *ctrls;
Hans de Goedea0001a22009-06-10 04:52:18 -03001415 int ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001416
Hans de Goedea0001a22009-06-10 04:52:18 -03001417 ctrls = get_ctrl(gspca_dev, ctrl->id);
1418 if (ctrls == NULL)
1419 return -EINVAL;
1420
1421 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1422 return -ERESTARTSYS;
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001423 gspca_dev->usb_err = 0;
Hans de Goedea0001a22009-06-10 04:52:18 -03001424 if (gspca_dev->present)
1425 ret = ctrls->get(gspca_dev, &ctrl->value);
1426 else
1427 ret = -ENODEV;
1428 mutex_unlock(&gspca_dev->usb_lock);
1429 return ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001430}
1431
Jean-Francois Moinef955c4f2008-11-28 08:51:50 -03001432/*fixme: have an audio flag in gspca_dev?*/
1433static int vidioc_s_audio(struct file *file, void *priv,
1434 struct v4l2_audio *audio)
1435{
1436 if (audio->index != 0)
1437 return -EINVAL;
1438 return 0;
1439}
1440
1441static int vidioc_g_audio(struct file *file, void *priv,
1442 struct v4l2_audio *audio)
1443{
Jean-Francois Moinef955c4f2008-11-28 08:51:50 -03001444 strcpy(audio->name, "Microphone");
1445 return 0;
1446}
1447
1448static int vidioc_enumaudio(struct file *file, void *priv,
1449 struct v4l2_audio *audio)
1450{
1451 if (audio->index != 0)
1452 return -EINVAL;
1453
1454 strcpy(audio->name, "Microphone");
1455 audio->capability = 0;
1456 audio->mode = 0;
1457 return 0;
1458}
1459
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001460static int vidioc_querymenu(struct file *file, void *priv,
1461 struct v4l2_querymenu *qmenu)
1462{
1463 struct gspca_dev *gspca_dev = priv;
1464
1465 if (!gspca_dev->sd_desc->querymenu)
1466 return -EINVAL;
1467 return gspca_dev->sd_desc->querymenu(gspca_dev, qmenu);
1468}
1469
1470static int vidioc_enum_input(struct file *file, void *priv,
1471 struct v4l2_input *input)
1472{
1473 struct gspca_dev *gspca_dev = priv;
1474
1475 if (input->index != 0)
1476 return -EINVAL;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001477 input->type = V4L2_INPUT_TYPE_CAMERA;
Adam Bakerdfa76fa2009-03-29 19:17:10 -03001478 input->status = gspca_dev->cam.input_flags;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001479 strncpy(input->name, gspca_dev->sd_desc->name,
1480 sizeof input->name);
1481 return 0;
1482}
1483
1484static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
1485{
1486 *i = 0;
1487 return 0;
1488}
1489
1490static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
1491{
1492 if (i > 0)
1493 return -EINVAL;
1494 return (0);
1495}
1496
1497static int vidioc_reqbufs(struct file *file, void *priv,
1498 struct v4l2_requestbuffers *rb)
1499{
1500 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001501 int i, ret = 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001502
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001503 switch (rb->memory) {
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001504 case GSPCA_MEMORY_READ: /* (internal call) */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001505 case V4L2_MEMORY_MMAP:
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001506 case V4L2_MEMORY_USERPTR:
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001507 break;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001508 default:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001509 return -EINVAL;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001510 }
Hans de Goedee2997a72008-04-23 08:09:12 -03001511 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1512 return -ERESTARTSYS;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001513
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001514 if (gspca_dev->memory != GSPCA_MEMORY_NO
1515 && gspca_dev->memory != rb->memory) {
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001516 ret = -EBUSY;
1517 goto out;
1518 }
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001519
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001520 /* only one file may do the capture */
1521 if (gspca_dev->capt_file != NULL
1522 && gspca_dev->capt_file != file) {
1523 ret = -EBUSY;
1524 goto out;
1525 }
1526
1527 /* if allocated, the buffers must not be mapped */
1528 for (i = 0; i < gspca_dev->nframes; i++) {
1529 if (gspca_dev->frame[i].vma_use_count) {
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001530 ret = -EBUSY;
1531 goto out;
1532 }
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001533 }
1534
1535 /* stop streaming */
1536 if (gspca_dev->streaming) {
1537 mutex_lock(&gspca_dev->usb_lock);
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001538 gspca_dev->usb_err = 0;
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001539 gspca_stream_off(gspca_dev);
1540 mutex_unlock(&gspca_dev->usb_lock);
1541 }
1542
1543 /* free the previous allocated buffers, if any */
1544 if (gspca_dev->nframes != 0) {
1545 frame_free(gspca_dev);
1546 gspca_dev->capt_file = NULL;
1547 }
1548 if (rb->count == 0) /* unrequest */
1549 goto out;
1550 gspca_dev->memory = rb->memory;
1551 ret = frame_alloc(gspca_dev, rb->count);
1552 if (ret == 0) {
1553 rb->count = gspca_dev->nframes;
1554 gspca_dev->capt_file = file;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001555 }
1556out:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001557 mutex_unlock(&gspca_dev->queue_lock);
1558 PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
1559 return ret;
1560}
1561
1562static int vidioc_querybuf(struct file *file, void *priv,
1563 struct v4l2_buffer *v4l2_buf)
1564{
1565 struct gspca_dev *gspca_dev = priv;
1566 struct gspca_frame *frame;
1567
Jean-Francois Moine13752bd2008-12-19 15:08:51 -03001568 if (v4l2_buf->index < 0
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001569 || v4l2_buf->index >= gspca_dev->nframes)
1570 return -EINVAL;
1571
1572 frame = &gspca_dev->frame[v4l2_buf->index];
1573 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1574 return 0;
1575}
1576
1577static int vidioc_streamon(struct file *file, void *priv,
1578 enum v4l2_buf_type buf_type)
1579{
1580 struct gspca_dev *gspca_dev = priv;
1581 int ret;
1582
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001583 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1584 return -EINVAL;
Hans de Goedee2997a72008-04-23 08:09:12 -03001585 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1586 return -ERESTARTSYS;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001587
Jean-Francois Moine1edabe72008-12-19 15:17:25 -03001588 if (gspca_dev->nframes == 0
1589 || !(gspca_dev->frame[0].v4l2_buf.flags & V4L2_BUF_FLAG_QUEUED)) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001590 ret = -EINVAL;
1591 goto out;
1592 }
1593 if (!gspca_dev->streaming) {
1594 ret = gspca_init_transfer(gspca_dev);
1595 if (ret < 0)
1596 goto out;
1597 }
Jean-Francois Moine335b3f82008-07-30 04:53:02 -03001598#ifdef GSPCA_DEBUG
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001599 if (gspca_debug & D_STREAM) {
1600 PDEBUG_MODE("stream on OK",
1601 gspca_dev->pixfmt,
1602 gspca_dev->width,
1603 gspca_dev->height);
1604 }
1605#endif
Hans de Goedee2997a72008-04-23 08:09:12 -03001606 ret = 0;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001607out:
1608 mutex_unlock(&gspca_dev->queue_lock);
1609 return ret;
1610}
1611
1612static int vidioc_streamoff(struct file *file, void *priv,
1613 enum v4l2_buf_type buf_type)
1614{
1615 struct gspca_dev *gspca_dev = priv;
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001616 int i, ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001617
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001618 if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1619 return -EINVAL;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001620 if (!gspca_dev->streaming)
1621 return 0;
1622 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1623 return -ERESTARTSYS;
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001624
1625 /* stop streaming */
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001626 if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
1627 ret = -ERESTARTSYS;
1628 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001629 }
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001630 gspca_dev->usb_err = 0;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001631 gspca_stream_off(gspca_dev);
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001632 mutex_unlock(&gspca_dev->usb_lock);
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001633
1634 /* empty the application queues */
1635 for (i = 0; i < gspca_dev->nframes; i++)
1636 gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
1637 gspca_dev->fr_i = gspca_dev->fr_o = gspca_dev->fr_q = 0;
1638 gspca_dev->last_packet_type = DISCARD_PACKET;
1639 gspca_dev->sequence = 0;
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001640 ret = 0;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001641out:
1642 mutex_unlock(&gspca_dev->queue_lock);
1643 return ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001644}
1645
1646static int vidioc_g_jpegcomp(struct file *file, void *priv,
1647 struct v4l2_jpegcompression *jpegcomp)
1648{
1649 struct gspca_dev *gspca_dev = priv;
1650 int ret;
1651
1652 if (!gspca_dev->sd_desc->get_jcomp)
1653 return -EINVAL;
Hans de Goedee2997a72008-04-23 08:09:12 -03001654 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1655 return -ERESTARTSYS;
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001656 gspca_dev->usb_err = 0;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001657 if (gspca_dev->present)
1658 ret = gspca_dev->sd_desc->get_jcomp(gspca_dev, jpegcomp);
1659 else
1660 ret = -ENODEV;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001661 mutex_unlock(&gspca_dev->usb_lock);
1662 return ret;
1663}
1664
1665static int vidioc_s_jpegcomp(struct file *file, void *priv,
1666 struct v4l2_jpegcompression *jpegcomp)
1667{
1668 struct gspca_dev *gspca_dev = priv;
1669 int ret;
1670
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001671 if (!gspca_dev->sd_desc->set_jcomp)
1672 return -EINVAL;
Jim Parisf86d4a92008-12-10 05:50:44 -03001673 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1674 return -ERESTARTSYS;
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001675 gspca_dev->usb_err = 0;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001676 if (gspca_dev->present)
1677 ret = gspca_dev->sd_desc->set_jcomp(gspca_dev, jpegcomp);
1678 else
1679 ret = -ENODEV;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001680 mutex_unlock(&gspca_dev->usb_lock);
1681 return ret;
1682}
1683
1684static int vidioc_g_parm(struct file *filp, void *priv,
1685 struct v4l2_streamparm *parm)
1686{
1687 struct gspca_dev *gspca_dev = priv;
1688
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001689 parm->parm.capture.readbuffers = gspca_dev->nbufread;
Jim Paris627a5ef2008-12-10 06:02:42 -03001690
1691 if (gspca_dev->sd_desc->get_streamparm) {
1692 int ret;
1693
1694 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1695 return -ERESTARTSYS;
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001696 gspca_dev->usb_err = 0;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001697 if (gspca_dev->present)
1698 ret = gspca_dev->sd_desc->get_streamparm(gspca_dev,
1699 parm);
1700 else
1701 ret = -ENODEV;
Jim Paris627a5ef2008-12-10 06:02:42 -03001702 mutex_unlock(&gspca_dev->usb_lock);
1703 return ret;
1704 }
1705
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001706 return 0;
1707}
1708
1709static int vidioc_s_parm(struct file *filp, void *priv,
1710 struct v4l2_streamparm *parm)
1711{
1712 struct gspca_dev *gspca_dev = priv;
1713 int n;
1714
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001715 n = parm->parm.capture.readbuffers;
1716 if (n == 0 || n > GSPCA_MAX_FRAMES)
1717 parm->parm.capture.readbuffers = gspca_dev->nbufread;
1718 else
1719 gspca_dev->nbufread = n;
Jim Paris627a5ef2008-12-10 06:02:42 -03001720
1721 if (gspca_dev->sd_desc->set_streamparm) {
1722 int ret;
1723
1724 if (mutex_lock_interruptible(&gspca_dev->usb_lock))
1725 return -ERESTARTSYS;
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001726 gspca_dev->usb_err = 0;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001727 if (gspca_dev->present)
1728 ret = gspca_dev->sd_desc->set_streamparm(gspca_dev,
1729 parm);
1730 else
1731 ret = -ENODEV;
Jim Paris627a5ef2008-12-10 06:02:42 -03001732 mutex_unlock(&gspca_dev->usb_lock);
1733 return ret;
1734 }
1735
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001736 return 0;
1737}
1738
1739#ifdef CONFIG_VIDEO_V4L1_COMPAT
1740static int vidiocgmbuf(struct file *file, void *priv,
1741 struct video_mbuf *mbuf)
1742{
1743 struct gspca_dev *gspca_dev = file->private_data;
1744 int i;
1745
1746 PDEBUG(D_STREAM, "cgmbuf");
1747 if (gspca_dev->nframes == 0) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001748 int ret;
1749
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001750 {
1751 struct v4l2_format fmt;
1752
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001753 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1754 i = gspca_dev->cam.nmodes - 1; /* highest mode */
1755 fmt.fmt.pix.width = gspca_dev->cam.cam_mode[i].width;
1756 fmt.fmt.pix.height = gspca_dev->cam.cam_mode[i].height;
1757 fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_BGR24;
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03001758 ret = vidioc_s_fmt_vid_cap(file, priv, &fmt);
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03001759 if (ret != 0)
1760 return ret;
1761 }
1762 {
1763 struct v4l2_requestbuffers rb;
1764
1765 memset(&rb, 0, sizeof rb);
1766 rb.count = 4;
1767 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1768 rb.memory = V4L2_MEMORY_MMAP;
1769 ret = vidioc_reqbufs(file, priv, &rb);
1770 if (ret != 0)
1771 return ret;
1772 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001773 }
1774 mbuf->frames = gspca_dev->nframes;
1775 mbuf->size = gspca_dev->frsz * gspca_dev->nframes;
1776 for (i = 0; i < mbuf->frames; i++)
1777 mbuf->offsets[i] = gspca_dev->frame[i].v4l2_buf.m.offset;
1778 return 0;
1779}
1780#endif
1781
1782static int dev_mmap(struct file *file, struct vm_area_struct *vma)
1783{
1784 struct gspca_dev *gspca_dev = file->private_data;
Harvey Harrisonefab8212008-07-05 06:12:47 -03001785 struct gspca_frame *frame;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001786 struct page *page;
1787 unsigned long addr, start, size;
1788 int i, ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001789
1790 start = vma->vm_start;
1791 size = vma->vm_end - vma->vm_start;
1792 PDEBUG(D_STREAM, "mmap start:%08x size:%d", (int) start, (int) size);
1793
Hans de Goedee2997a72008-04-23 08:09:12 -03001794 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1795 return -ERESTARTSYS;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001796 if (!gspca_dev->present) {
1797 ret = -ENODEV;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001798 goto out;
1799 }
1800 if (gspca_dev->capt_file != file) {
1801 ret = -EINVAL;
1802 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001803 }
1804
Harvey Harrisonefab8212008-07-05 06:12:47 -03001805 frame = NULL;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001806 for (i = 0; i < gspca_dev->nframes; ++i) {
1807 if (gspca_dev->frame[i].v4l2_buf.memory != V4L2_MEMORY_MMAP) {
1808 PDEBUG(D_STREAM, "mmap bad memory type");
1809 break;
1810 }
1811 if ((gspca_dev->frame[i].v4l2_buf.m.offset >> PAGE_SHIFT)
1812 == vma->vm_pgoff) {
1813 frame = &gspca_dev->frame[i];
1814 break;
1815 }
1816 }
Harvey Harrisonefab8212008-07-05 06:12:47 -03001817 if (frame == NULL) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001818 PDEBUG(D_STREAM, "mmap no frame buffer found");
1819 ret = -EINVAL;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001820 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001821 }
1822#ifdef CONFIG_VIDEO_V4L1_COMPAT
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001823 /* v4l1 maps all the buffers */
1824 if (i != 0
1825 || size != frame->v4l2_buf.length * gspca_dev->nframes)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001826#endif
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001827 if (size != frame->v4l2_buf.length) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001828 PDEBUG(D_STREAM, "mmap bad size");
1829 ret = -EINVAL;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001830 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001831 }
1832
1833 /*
1834 * - VM_IO marks the area as being a mmaped region for I/O to a
1835 * device. It also prevents the region from being core dumped.
1836 */
1837 vma->vm_flags |= VM_IO;
1838
1839 addr = (unsigned long) frame->data;
1840 while (size > 0) {
1841 page = vmalloc_to_page((void *) addr);
1842 ret = vm_insert_page(vma, start, page);
1843 if (ret < 0)
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001844 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001845 start += PAGE_SIZE;
1846 addr += PAGE_SIZE;
1847 size -= PAGE_SIZE;
1848 }
1849
Jean-Francois Moined50e2572009-11-26 15:36:40 -03001850 vma->vm_ops = &gspca_vm_ops;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001851 vma->vm_private_data = frame;
1852 gspca_vm_open(vma);
Hans de Goedee2997a72008-04-23 08:09:12 -03001853 ret = 0;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001854out:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001855 mutex_unlock(&gspca_dev->queue_lock);
1856 return ret;
1857}
1858
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001859/*
1860 * wait for a video frame
1861 *
1862 * If a frame is ready, its index is returned.
1863 */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001864static int frame_wait(struct gspca_dev *gspca_dev,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001865 int nonblock_ing)
1866{
1867 struct gspca_frame *frame;
1868 int i, j, ret;
1869
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001870 /* check if a frame is ready */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001871 i = gspca_dev->fr_o;
1872 j = gspca_dev->fr_queue[i];
1873 frame = &gspca_dev->frame[j];
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001874
Hans de Goede181b7042008-11-19 17:16:26 -03001875 if (!(frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE)) {
1876 if (nonblock_ing)
1877 return -EAGAIN;
1878
1879 /* wait till a frame is ready */
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001880 ret = wait_event_interruptible_timeout(gspca_dev->wq,
Hans de Goede181b7042008-11-19 17:16:26 -03001881 (frame->v4l2_buf.flags & V4L2_BUF_FLAG_DONE) ||
1882 !gspca_dev->streaming || !gspca_dev->present,
1883 msecs_to_jiffies(3000));
1884 if (ret < 0)
1885 return ret;
1886 if (ret == 0 || !gspca_dev->streaming || !gspca_dev->present)
Hans de Goedee2997a72008-04-23 08:09:12 -03001887 return -EIO;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001888 }
Hans de Goede181b7042008-11-19 17:16:26 -03001889
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001890 gspca_dev->fr_o = (i + 1) % gspca_dev->nframes;
1891 PDEBUG(D_FRAM, "frame wait q:%d i:%d o:%d",
1892 gspca_dev->fr_q,
1893 gspca_dev->fr_i,
1894 gspca_dev->fr_o);
Hans de Goedee2997a72008-04-23 08:09:12 -03001895
Jean-Francois Moine739570b2008-07-14 09:38:29 -03001896 if (gspca_dev->sd_desc->dq_callback) {
1897 mutex_lock(&gspca_dev->usb_lock);
Jean-Francois Moine8c4ebae2009-12-02 07:14:33 -03001898 gspca_dev->usb_err = 0;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001899 if (gspca_dev->present)
1900 gspca_dev->sd_desc->dq_callback(gspca_dev);
Jean-Francois Moine739570b2008-07-14 09:38:29 -03001901 mutex_unlock(&gspca_dev->usb_lock);
1902 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001903 return j;
1904}
1905
1906/*
1907 * dequeue a video buffer
1908 *
1909 * If nonblock_ing is false, block until a buffer is available.
1910 */
1911static int vidioc_dqbuf(struct file *file, void *priv,
1912 struct v4l2_buffer *v4l2_buf)
1913{
1914 struct gspca_dev *gspca_dev = priv;
1915 struct gspca_frame *frame;
1916 int i, ret;
1917
1918 PDEBUG(D_FRAM, "dqbuf");
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001919 if (v4l2_buf->memory != gspca_dev->memory)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001920 return -EINVAL;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001921
Jean-Francois Moine090264e2009-02-12 08:05:45 -03001922 if (!gspca_dev->present)
1923 return -ENODEV;
1924
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001925 /* if not streaming, be sure the application will not loop forever */
1926 if (!(file->f_flags & O_NONBLOCK)
1927 && !gspca_dev->streaming && gspca_dev->users == 1)
1928 return -EINVAL;
1929
1930 /* only the capturing file may dequeue */
1931 if (gspca_dev->capt_file != file)
1932 return -EINVAL;
1933
1934 /* only one dequeue / read at a time */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001935 if (mutex_lock_interruptible(&gspca_dev->read_lock))
1936 return -ERESTARTSYS;
1937
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001938 ret = frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001939 if (ret < 0)
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001940 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001941 i = ret; /* frame index */
1942 frame = &gspca_dev->frame[i];
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001943 if (gspca_dev->memory == V4L2_MEMORY_USERPTR) {
Hans Verkuilc6eb8ea2008-09-03 17:11:54 -03001944 if (copy_to_user((__u8 __user *) frame->v4l2_buf.m.userptr,
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03001945 frame->data,
1946 frame->v4l2_buf.bytesused)) {
1947 PDEBUG(D_ERR|D_STREAM,
1948 "dqbuf cp to user failed");
1949 ret = -EFAULT;
1950 goto out;
1951 }
1952 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001953 frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
1954 memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
1955 PDEBUG(D_FRAM, "dqbuf %d", i);
1956 ret = 0;
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03001957out:
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001958 mutex_unlock(&gspca_dev->read_lock);
1959 return ret;
1960}
1961
1962/*
1963 * queue a video buffer
1964 *
1965 * Attempting to queue a buffer that has already been
1966 * queued will return -EINVAL.
1967 */
1968static int vidioc_qbuf(struct file *file, void *priv,
1969 struct v4l2_buffer *v4l2_buf)
1970{
1971 struct gspca_dev *gspca_dev = priv;
1972 struct gspca_frame *frame;
1973 int i, index, ret;
1974
1975 PDEBUG(D_FRAM, "qbuf %d", v4l2_buf->index);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001976
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001977 if (mutex_lock_interruptible(&gspca_dev->queue_lock))
1978 return -ERESTARTSYS;
1979
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001980 index = v4l2_buf->index;
1981 if ((unsigned) index >= gspca_dev->nframes) {
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001982 PDEBUG(D_FRAM,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001983 "qbuf idx %d >= %d", index, gspca_dev->nframes);
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001984 ret = -EINVAL;
1985 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001986 }
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001987 if (v4l2_buf->memory != gspca_dev->memory) {
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001988 PDEBUG(D_FRAM, "qbuf bad memory type");
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001989 ret = -EINVAL;
1990 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001991 }
1992
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03001993 frame = &gspca_dev->frame[index];
Jean-Francois Moined43fa322008-06-12 10:58:58 -03001994 if (frame->v4l2_buf.flags & BUF_ALL_FLAGS) {
1995 PDEBUG(D_FRAM, "qbuf bad state");
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03001996 ret = -EINVAL;
1997 goto out;
1998 }
1999
2000 frame->v4l2_buf.flags |= V4L2_BUF_FLAG_QUEUED;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002001
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002002 if (frame->v4l2_buf.memory == V4L2_MEMORY_USERPTR) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002003 frame->v4l2_buf.m.userptr = v4l2_buf->m.userptr;
2004 frame->v4l2_buf.length = v4l2_buf->length;
2005 }
2006
2007 /* put the buffer in the 'queued' queue */
2008 i = gspca_dev->fr_q;
2009 gspca_dev->fr_queue[i] = index;
Jean-Francois Moine8c32aa52009-12-14 14:57:49 -03002010 if (gspca_dev->fr_i == i)
2011 gspca_dev->cur_frame = frame;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002012 gspca_dev->fr_q = (i + 1) % gspca_dev->nframes;
2013 PDEBUG(D_FRAM, "qbuf q:%d i:%d o:%d",
2014 gspca_dev->fr_q,
2015 gspca_dev->fr_i,
2016 gspca_dev->fr_o);
2017
2018 v4l2_buf->flags |= V4L2_BUF_FLAG_QUEUED;
2019 v4l2_buf->flags &= ~V4L2_BUF_FLAG_DONE;
2020 ret = 0;
2021out:
2022 mutex_unlock(&gspca_dev->queue_lock);
2023 return ret;
2024}
2025
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002026/*
2027 * allocate the resources for read()
2028 */
2029static int read_alloc(struct gspca_dev *gspca_dev,
2030 struct file *file)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002031{
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002032 struct v4l2_buffer v4l2_buf;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002033 int i, ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002034
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002035 PDEBUG(D_STREAM, "read alloc");
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002036 if (gspca_dev->nframes == 0) {
2037 struct v4l2_requestbuffers rb;
2038
2039 memset(&rb, 0, sizeof rb);
2040 rb.count = gspca_dev->nbufread;
2041 rb.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03002042 rb.memory = GSPCA_MEMORY_READ;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002043 ret = vidioc_reqbufs(file, gspca_dev, &rb);
2044 if (ret != 0) {
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002045 PDEBUG(D_STREAM, "read reqbuf err %d", ret);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002046 return ret;
2047 }
2048 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2049 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03002050 v4l2_buf.memory = GSPCA_MEMORY_READ;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002051 for (i = 0; i < gspca_dev->nbufread; i++) {
2052 v4l2_buf.index = i;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002053 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2054 if (ret != 0) {
2055 PDEBUG(D_STREAM, "read qbuf err: %d", ret);
2056 return ret;
2057 }
2058 }
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002059 gspca_dev->memory = GSPCA_MEMORY_READ;
2060 }
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03002061
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002062 /* start streaming */
2063 ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE);
2064 if (ret != 0)
2065 PDEBUG(D_STREAM, "read streamon err %d", ret);
2066 return ret;
2067}
2068
2069static unsigned int dev_poll(struct file *file, poll_table *wait)
2070{
2071 struct gspca_dev *gspca_dev = file->private_data;
2072 int i, ret;
2073
2074 PDEBUG(D_FRAM, "poll");
2075
2076 poll_wait(file, &gspca_dev->wq, wait);
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002077
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03002078 /* if reqbufs is not done, the user would use read() */
2079 if (gspca_dev->nframes == 0) {
2080 if (gspca_dev->memory != GSPCA_MEMORY_NO)
2081 return POLLERR; /* not the 1st time */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002082 ret = read_alloc(gspca_dev, file);
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03002083 if (ret != 0)
2084 return POLLERR;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002085 }
2086
2087 if (mutex_lock_interruptible(&gspca_dev->queue_lock) != 0)
2088 return POLLERR;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002089
Jean-Francois Moine5b77ae72008-07-12 09:28:04 -03002090 /* check the next incoming buffer */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002091 i = gspca_dev->fr_o;
2092 i = gspca_dev->fr_queue[i];
2093 if (gspca_dev->frame[i].v4l2_buf.flags & V4L2_BUF_FLAG_DONE)
2094 ret = POLLIN | POLLRDNORM; /* something to read */
2095 else
2096 ret = 0;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002097 mutex_unlock(&gspca_dev->queue_lock);
Jean-Francois Moine090264e2009-02-12 08:05:45 -03002098 if (!gspca_dev->present)
2099 return POLLHUP;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002100 return ret;
2101}
2102
2103static ssize_t dev_read(struct file *file, char __user *data,
2104 size_t count, loff_t *ppos)
2105{
2106 struct gspca_dev *gspca_dev = file->private_data;
2107 struct gspca_frame *frame;
2108 struct v4l2_buffer v4l2_buf;
2109 struct timeval timestamp;
Jean-Francois Moine82643d02008-07-02 09:14:56 -03002110 int n, ret, ret2;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002111
Mauro Carvalho Chehaba9e11132008-07-09 05:26:26 -03002112 PDEBUG(D_FRAM, "read (%zd)", count);
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002113 if (!gspca_dev->present)
2114 return -ENODEV;
2115 switch (gspca_dev->memory) {
2116 case GSPCA_MEMORY_NO: /* first time */
2117 ret = read_alloc(gspca_dev, file);
2118 if (ret != 0)
2119 return ret;
2120 break;
2121 case GSPCA_MEMORY_READ:
Jean-Francois Moine82643d02008-07-02 09:14:56 -03002122 if (gspca_dev->capt_file == file)
2123 break;
2124 /* fall thru */
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002125 default:
2126 return -EINVAL;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002127 }
2128
2129 /* get a frame */
2130 jiffies_to_timeval(get_jiffies_64(), &timestamp);
2131 timestamp.tv_sec--;
Jean-Francois Moine82643d02008-07-02 09:14:56 -03002132 n = 2;
2133 for (;;) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002134 memset(&v4l2_buf, 0, sizeof v4l2_buf);
2135 v4l2_buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03002136 v4l2_buf.memory = GSPCA_MEMORY_READ;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002137 ret = vidioc_dqbuf(file, gspca_dev, &v4l2_buf);
2138 if (ret != 0) {
2139 PDEBUG(D_STREAM, "read dqbuf err %d", ret);
2140 return ret;
2141 }
2142
2143 /* if the process slept for more than 1 second,
Frank Zago219423c2008-09-26 07:43:54 -03002144 * get a newer frame */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002145 frame = &gspca_dev->frame[v4l2_buf.index];
Jean-Francois Moine82643d02008-07-02 09:14:56 -03002146 if (--n < 0)
2147 break; /* avoid infinite loop */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002148 if (frame->v4l2_buf.timestamp.tv_sec >= timestamp.tv_sec)
2149 break;
2150 ret = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2151 if (ret != 0) {
2152 PDEBUG(D_STREAM, "read qbuf err %d", ret);
2153 return ret;
2154 }
2155 }
2156
2157 /* copy the frame */
Jean-Francois Moineac0d6df2008-07-08 06:58:15 -03002158 if (count > frame->v4l2_buf.bytesused)
2159 count = frame->v4l2_buf.bytesused;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002160 ret = copy_to_user(data, frame->data, count);
2161 if (ret != 0) {
2162 PDEBUG(D_ERR|D_STREAM,
Mauro Carvalho Chehaba9e11132008-07-09 05:26:26 -03002163 "read cp to user lack %d / %zd", ret, count);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002164 ret = -EFAULT;
2165 goto out;
2166 }
2167 ret = count;
2168out:
2169 /* in each case, requeue the buffer */
2170 ret2 = vidioc_qbuf(file, gspca_dev, &v4l2_buf);
2171 if (ret2 != 0)
2172 return ret2;
2173 return ret;
2174}
2175
Hans Verkuilbec43662008-12-30 06:58:20 -03002176static struct v4l2_file_operations dev_fops = {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002177 .owner = THIS_MODULE,
2178 .open = dev_open,
2179 .release = dev_close,
2180 .read = dev_read,
2181 .mmap = dev_mmap,
Hans Verkuilbec43662008-12-30 06:58:20 -03002182 .unlocked_ioctl = video_ioctl2,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002183 .poll = dev_poll,
2184};
2185
Hans Verkuila3998102008-07-21 02:57:38 -03002186static const struct v4l2_ioctl_ops dev_ioctl_ops = {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002187 .vidioc_querycap = vidioc_querycap,
2188 .vidioc_dqbuf = vidioc_dqbuf,
2189 .vidioc_qbuf = vidioc_qbuf,
Mauro Carvalho Chehabe0787702008-07-01 04:06:22 -03002190 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
2191 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
2192 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
2193 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002194 .vidioc_streamon = vidioc_streamon,
2195 .vidioc_queryctrl = vidioc_queryctrl,
2196 .vidioc_g_ctrl = vidioc_g_ctrl,
2197 .vidioc_s_ctrl = vidioc_s_ctrl,
Jean-Francois Moinef955c4f2008-11-28 08:51:50 -03002198 .vidioc_g_audio = vidioc_g_audio,
2199 .vidioc_s_audio = vidioc_s_audio,
2200 .vidioc_enumaudio = vidioc_enumaudio,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002201 .vidioc_querymenu = vidioc_querymenu,
2202 .vidioc_enum_input = vidioc_enum_input,
2203 .vidioc_g_input = vidioc_g_input,
2204 .vidioc_s_input = vidioc_s_input,
2205 .vidioc_reqbufs = vidioc_reqbufs,
2206 .vidioc_querybuf = vidioc_querybuf,
2207 .vidioc_streamoff = vidioc_streamoff,
2208 .vidioc_g_jpegcomp = vidioc_g_jpegcomp,
2209 .vidioc_s_jpegcomp = vidioc_s_jpegcomp,
2210 .vidioc_g_parm = vidioc_g_parm,
2211 .vidioc_s_parm = vidioc_s_parm,
Hans de Goede11c635a2009-05-25 15:04:22 -03002212 .vidioc_enum_framesizes = vidioc_enum_framesizes,
Antonio Ospite28ffe772009-12-02 06:18:46 -03002213 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
Brian Johnsonaf1d9af2009-07-19 05:29:20 -03002214#ifdef CONFIG_VIDEO_ADV_DEBUG
2215 .vidioc_g_register = vidioc_g_register,
2216 .vidioc_s_register = vidioc_s_register,
2217#endif
2218 .vidioc_g_chip_ident = vidioc_g_chip_ident,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002219#ifdef CONFIG_VIDEO_V4L1_COMPAT
2220 .vidiocgmbuf = vidiocgmbuf,
2221#endif
2222};
2223
Hans Verkuila3998102008-07-21 02:57:38 -03002224static struct video_device gspca_template = {
2225 .name = "gspca main driver",
Hans Verkuila3998102008-07-21 02:57:38 -03002226 .fops = &dev_fops,
2227 .ioctl_ops = &dev_ioctl_ops,
Hans de Goeded0182302008-11-19 17:10:47 -03002228 .release = gspca_release,
Hans Verkuila3998102008-07-21 02:57:38 -03002229};
2230
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002231/*
2232 * probe and create a new gspca device
2233 *
2234 * This function must be called by the sub-driver when it is
2235 * called for probing a new device.
2236 */
2237int gspca_dev_probe(struct usb_interface *intf,
2238 const struct usb_device_id *id,
2239 const struct sd_desc *sd_desc,
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002240 int dev_size,
2241 struct module *module)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002242{
2243 struct usb_interface_descriptor *interface;
2244 struct gspca_dev *gspca_dev;
2245 struct usb_device *dev = interface_to_usbdev(intf);
2246 int ret;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002247
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03002248 PDEBUG(D_PROBE, "probing %04x:%04x", id->idVendor, id->idProduct);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002249
2250 /* we don't handle multi-config cameras */
Jean-Francois Moine0d07e242009-10-01 13:44:49 -03002251 if (dev->descriptor.bNumConfigurations != 1) {
2252 PDEBUG(D_ERR, "Too many config");
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002253 return -ENODEV;
Jean-Francois Moine0d07e242009-10-01 13:44:49 -03002254 }
Jean-Francois Moine52a9d3e2010-01-05 04:44:00 -03002255
Jean-Francois Moineb7a597d2010-01-10 16:36:53 -03002256 /* the USB video interface must be the first one */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002257 interface = &intf->cur_altsetting->desc;
Jean-Francois Moineb7a597d2010-01-10 16:36:53 -03002258 if (dev->config->desc.bNumInterfaces != 1 &&
2259 interface->bInterfaceNumber != 0)
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002260 return -ENODEV;
2261
2262 /* create the device */
2263 if (dev_size < sizeof *gspca_dev)
2264 dev_size = sizeof *gspca_dev;
2265 gspca_dev = kzalloc(dev_size, GFP_KERNEL);
Erik Andrene293e592008-10-03 08:46:50 -03002266 if (!gspca_dev) {
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002267 err("couldn't kzalloc gspca struct");
Erik Andrene293e592008-10-03 08:46:50 -03002268 return -ENOMEM;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002269 }
Jean-Francois Moine8295d992008-09-03 17:12:19 -03002270 gspca_dev->usb_buf = kmalloc(USB_BUF_SZ, GFP_KERNEL);
2271 if (!gspca_dev->usb_buf) {
2272 err("out of memory");
Erik Andrene293e592008-10-03 08:46:50 -03002273 ret = -ENOMEM;
Jean-Francois Moine8295d992008-09-03 17:12:19 -03002274 goto out;
2275 }
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002276 gspca_dev->dev = dev;
2277 gspca_dev->iface = interface->bInterfaceNumber;
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002278 gspca_dev->nbalt = intf->num_altsetting;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002279 gspca_dev->sd_desc = sd_desc;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002280 gspca_dev->nbufread = 2;
Jean-Francois Moineff374742008-10-23 07:29:51 -03002281 gspca_dev->empty_packet = -1; /* don't check the empty packets */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002282
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03002283 /* configure the subdriver and initialize the USB device */
Jean-Francois Moineba38ee82008-11-22 04:27:34 -03002284 ret = sd_desc->config(gspca_dev, id);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002285 if (ret < 0)
2286 goto out;
Jean-Francois Moineba38ee82008-11-22 04:27:34 -03002287 ret = sd_desc->init(gspca_dev);
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03002288 if (ret < 0)
2289 goto out;
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002290 gspca_set_default_mode(gspca_dev);
2291
2292 mutex_init(&gspca_dev->usb_lock);
2293 mutex_init(&gspca_dev->read_lock);
2294 mutex_init(&gspca_dev->queue_lock);
2295 init_waitqueue_head(&gspca_dev->wq);
2296
2297 /* init video stuff */
Jean-Francois Moineba38ee82008-11-22 04:27:34 -03002298 memcpy(&gspca_dev->vdev, &gspca_template, sizeof gspca_template);
Hans de Goede24441632009-03-27 16:08:20 -03002299 gspca_dev->vdev.parent = &intf->dev;
Jean-Francois Moine5c4fa002008-11-18 15:52:31 -03002300 gspca_dev->module = module;
Oliver Neukumee56a4d2008-07-27 14:01:59 -03002301 gspca_dev->present = 1;
Jean-Francois Moinea12ca6a2008-11-19 06:37:53 -03002302 ret = video_register_device(&gspca_dev->vdev,
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002303 VFL_TYPE_GRABBER,
Jean-Francois Moine8d584a52009-01-13 06:07:59 -03002304 -1);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002305 if (ret < 0) {
2306 err("video_register_device err %d", ret);
2307 goto out;
2308 }
2309
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002310 usb_set_intfdata(intf, gspca_dev);
Laurent Pinchart38c7c032009-11-27 13:57:15 -03002311 PDEBUG(D_PROBE, "%s created", video_device_node_name(&gspca_dev->vdev));
Márton Németh0274d422010-01-28 06:39:49 -03002312
2313 ret = gspca_input_connect(gspca_dev);
2314 if (ret == 0)
2315 ret = gspca_input_create_urb(gspca_dev);
2316
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002317 return 0;
2318out:
Jean-Francois Moinee07a1d82008-11-19 06:37:53 -03002319 kfree(gspca_dev->usb_buf);
2320 kfree(gspca_dev);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002321 return ret;
2322}
2323EXPORT_SYMBOL(gspca_dev_probe);
2324
2325/*
2326 * USB disconnection
2327 *
2328 * This function must be called by the sub-driver
2329 * when the device disconnects, after the specific resources are freed.
2330 */
2331void gspca_disconnect(struct usb_interface *intf)
2332{
Jean-Francois Moine4aa0d032008-05-04 06:46:21 -03002333 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
Jean-François Moinee070bf92010-02-18 15:02:51 -03002334#ifdef CONFIG_INPUT
Márton Németh0274d422010-01-28 06:39:49 -03002335 struct input_dev *input_dev;
Jean-François Moinee070bf92010-02-18 15:02:51 -03002336#endif
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002337
Laurent Pinchart38c7c032009-11-27 13:57:15 -03002338 PDEBUG(D_PROBE, "%s disconnect",
2339 video_device_node_name(&gspca_dev->vdev));
Adam Bakerad281272009-02-04 15:33:21 -03002340 mutex_lock(&gspca_dev->usb_lock);
Jean-Francois Moine6e4ae872008-11-22 05:35:49 -03002341 gspca_dev->present = 0;
Jean-Francois Moine090264e2009-02-12 08:05:45 -03002342
2343 if (gspca_dev->streaming) {
2344 destroy_urbs(gspca_dev);
2345 wake_up_interruptible(&gspca_dev->wq);
2346 }
2347
Jean-François Moinee070bf92010-02-18 15:02:51 -03002348#ifdef CONFIG_INPUT
Márton Németh0274d422010-01-28 06:39:49 -03002349 gspca_input_destroy_urb(gspca_dev);
2350 input_dev = gspca_dev->input_dev;
2351 if (input_dev) {
2352 gspca_dev->input_dev = NULL;
2353 input_unregister_device(input_dev);
2354 }
Jean-François Moinee070bf92010-02-18 15:02:51 -03002355#endif
Márton Németh0274d422010-01-28 06:39:49 -03002356
Jean-Francois Moine090264e2009-02-12 08:05:45 -03002357 /* the device is freed at exit of this function */
2358 gspca_dev->dev = NULL;
Adam Bakerad281272009-02-04 15:33:21 -03002359 mutex_unlock(&gspca_dev->usb_lock);
Jean-Francois Moine6e4ae872008-11-22 05:35:49 -03002360
Frank Zago6b060ff2008-09-28 08:12:22 -03002361 usb_set_intfdata(intf, NULL);
2362
Jean-Francois Moinea12ca6a2008-11-19 06:37:53 -03002363 /* release the device */
2364 /* (this will call gspca_release() immediatly or on last close) */
2365 video_unregister_device(&gspca_dev->vdev);
Jean-Francois Moine3145b8c2008-10-05 04:22:10 -03002366
Jean-Francois Moine0d07e242009-10-01 13:44:49 -03002367/* PDEBUG(D_PROBE, "disconnect complete"); */
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002368}
2369EXPORT_SYMBOL(gspca_disconnect);
2370
Jean-Francois Moine6a709742008-09-03 16:48:10 -03002371#ifdef CONFIG_PM
2372int gspca_suspend(struct usb_interface *intf, pm_message_t message)
2373{
2374 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2375
2376 if (!gspca_dev->streaming)
2377 return 0;
2378 gspca_dev->frozen = 1; /* avoid urb error messages */
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03002379 if (gspca_dev->sd_desc->stopN)
2380 gspca_dev->sd_desc->stopN(gspca_dev);
Jean-Francois Moine6a709742008-09-03 16:48:10 -03002381 destroy_urbs(gspca_dev);
Márton Németh0274d422010-01-28 06:39:49 -03002382 gspca_input_destroy_urb(gspca_dev);
Jean-Francois Moine6a709742008-09-03 16:48:10 -03002383 gspca_set_alt0(gspca_dev);
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03002384 if (gspca_dev->sd_desc->stop0)
2385 gspca_dev->sd_desc->stop0(gspca_dev);
Jean-Francois Moine6a709742008-09-03 16:48:10 -03002386 return 0;
2387}
2388EXPORT_SYMBOL(gspca_suspend);
2389
2390int gspca_resume(struct usb_interface *intf)
2391{
2392 struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
2393
2394 gspca_dev->frozen = 0;
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03002395 gspca_dev->sd_desc->init(gspca_dev);
Márton Németh0274d422010-01-28 06:39:49 -03002396 gspca_input_create_urb(gspca_dev);
Jean-Francois Moine012d6b02008-09-03 17:12:16 -03002397 if (gspca_dev->streaming)
2398 return gspca_init_transfer(gspca_dev);
Jean-Francois Moine1e89e2d2008-09-03 17:12:15 -03002399 return 0;
Jean-Francois Moine6a709742008-09-03 16:48:10 -03002400}
2401EXPORT_SYMBOL(gspca_resume);
2402#endif
Hans de Goededcef3232008-07-10 10:40:53 -03002403/* -- cam driver utility functions -- */
2404
2405/* auto gain and exposure algorithm based on the knee algorithm described here:
2406 http://ytse.tricolour.net/docs/LowLightOptimization.html
2407
2408 Returns 0 if no changes were made, 1 if the gain and or exposure settings
2409 where changed. */
2410int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
2411 int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee)
2412{
2413 int i, steps, gain, orig_gain, exposure, orig_exposure, autogain;
2414 const struct ctrl *gain_ctrl = NULL;
2415 const struct ctrl *exposure_ctrl = NULL;
2416 const struct ctrl *autogain_ctrl = NULL;
2417 int retval = 0;
2418
2419 for (i = 0; i < gspca_dev->sd_desc->nctrls; i++) {
Hans de Goede26984b02010-02-01 13:18:37 -03002420 if (gspca_dev->ctrl_dis & (1 << i))
2421 continue;
Hans de Goededcef3232008-07-10 10:40:53 -03002422 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_GAIN)
2423 gain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2424 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_EXPOSURE)
2425 exposure_ctrl = &gspca_dev->sd_desc->ctrls[i];
2426 if (gspca_dev->sd_desc->ctrls[i].qctrl.id == V4L2_CID_AUTOGAIN)
2427 autogain_ctrl = &gspca_dev->sd_desc->ctrls[i];
2428 }
2429 if (!gain_ctrl || !exposure_ctrl || !autogain_ctrl) {
2430 PDEBUG(D_ERR, "Error: gspca_auto_gain_n_exposure called "
2431 "on cam without (auto)gain/exposure");
2432 return 0;
2433 }
2434
2435 if (gain_ctrl->get(gspca_dev, &gain) ||
2436 exposure_ctrl->get(gspca_dev, &exposure) ||
2437 autogain_ctrl->get(gspca_dev, &autogain) || !autogain)
2438 return 0;
2439
2440 orig_gain = gain;
2441 orig_exposure = exposure;
2442
2443 /* If we are of a multiple of deadzone, do multiple steps to reach the
2444 desired lumination fast (with the risc of a slight overshoot) */
2445 steps = abs(desired_avg_lum - avg_lum) / deadzone;
2446
Jean-Francois Moine1c44d812008-11-10 05:56:55 -03002447 PDEBUG(D_FRAM, "autogain: lum: %d, desired: %d, steps: %d",
Hans de Goededcef3232008-07-10 10:40:53 -03002448 avg_lum, desired_avg_lum, steps);
2449
2450 for (i = 0; i < steps; i++) {
2451 if (avg_lum > desired_avg_lum) {
2452 if (gain > gain_knee)
2453 gain--;
2454 else if (exposure > exposure_knee)
2455 exposure--;
2456 else if (gain > gain_ctrl->qctrl.default_value)
2457 gain--;
2458 else if (exposure > exposure_ctrl->qctrl.minimum)
2459 exposure--;
2460 else if (gain > gain_ctrl->qctrl.minimum)
2461 gain--;
2462 else
2463 break;
2464 } else {
2465 if (gain < gain_ctrl->qctrl.default_value)
2466 gain++;
2467 else if (exposure < exposure_knee)
2468 exposure++;
2469 else if (gain < gain_knee)
2470 gain++;
2471 else if (exposure < exposure_ctrl->qctrl.maximum)
2472 exposure++;
2473 else if (gain < gain_ctrl->qctrl.maximum)
2474 gain++;
2475 else
2476 break;
2477 }
2478 }
2479
2480 if (gain != orig_gain) {
2481 gain_ctrl->set(gspca_dev, gain);
2482 retval = 1;
2483 }
2484 if (exposure != orig_exposure) {
2485 exposure_ctrl->set(gspca_dev, exposure);
2486 retval = 1;
2487 }
2488
2489 return retval;
2490}
2491EXPORT_SYMBOL(gspca_auto_gain_n_exposure);
2492
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002493/* -- module insert / remove -- */
2494static int __init gspca_init(void)
2495{
Jean-Francois Moinebb64e862008-07-19 06:49:28 -03002496 info("main v%d.%d.%d registered",
2497 (DRIVER_VERSION_NUMBER >> 16) & 0xff,
2498 (DRIVER_VERSION_NUMBER >> 8) & 0xff,
2499 DRIVER_VERSION_NUMBER & 0xff);
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002500 return 0;
2501}
2502static void __exit gspca_exit(void)
2503{
2504 info("main deregistered");
2505}
2506
2507module_init(gspca_init);
2508module_exit(gspca_exit);
2509
Jean-Francois Moine335b3f82008-07-30 04:53:02 -03002510#ifdef GSPCA_DEBUG
Jean-Francois Moine63eb9542008-04-12 09:58:09 -03002511module_param_named(debug, gspca_debug, int, 0644);
2512MODULE_PARM_DESC(debug,
2513 "Debug (bit) 0x01:error 0x02:probe 0x04:config"
Jean-Francois Moined43fa322008-06-12 10:58:58 -03002514 " 0x08:stream 0x10:frame 0x20:packet 0x40:USBin 0x80:USBout"
2515 " 0x0100: v4l2");
Jean-Francois Moine6a7eba22008-06-30 15:50:11 -03002516#endif