tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * STV0680 USB Camera Driver, by Kevin Sisson (kjsisson@bellsouth.net)
3 *
4 * Thanks to STMicroelectronics for information on the usb commands, and
5 * to Steve Miller at STM for his help and encouragement while I was
6 * writing this driver.
7 *
8 * This driver is based heavily on the
9 * Endpoints (formerly known as AOX) se401 USB Camera Driver
10 * Copyright (c) 2000 Jeroen B. Vreeken (pe1rxq@amsat.org)
11 *
12 * Still somewhat based on the Linux ov511 driver.
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful, but
20 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
21 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 * for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software Foundation,
26 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 *
28 * History:
29 * ver 0.1 October, 2001. Initial attempt.
30 *
31 * ver 0.2 November, 2001. Fixed asbility to resize, added brightness
32 * function, made more stable (?)
33 *
34 * ver 0.21 Nov, 2001. Added gamma correction and white balance,
35 * due to Alexander Schwartz. Still trying to
36 * improve stablility. Moved stuff into stv680.h
37 *
38 * ver 0.22 Nov, 2001. Added sharpen function (by Michael Sweet,
39 * mike@easysw.com) from GIMP, also used in pencam.
40 * Simple, fast, good integer math routine.
41 *
42 * ver 0.23 Dec, 2001 (gkh)
43 * Took out sharpen function, ran code through
44 * Lindent, and did other minor tweaks to get
45 * things to work properly with 2.5.1
46 *
47 * ver 0.24 Jan, 2002 (kjs)
48 * Fixed the problem with webcam crashing after
49 * two pictures. Changed the way pic is halved to
50 * improve quality. Got rid of green line around
51 * frame. Fix brightness reset when changing size
52 * bug. Adjusted gamma filters slightly.
53 *
54 * ver 0.25 Jan, 2002 (kjs)
55 * Fixed a bug in which the driver sometimes attempted
56 * to set to a non-supported size. This allowed
57 * gnomemeeting to work.
58 * Fixed proc entry removal bug.
59 */
60
61#include <linux/module.h>
62#include <linux/init.h>
63#include <linux/vmalloc.h>
64#include <linux/slab.h>
65#include <linux/smp_lock.h>
66#include <linux/pagemap.h>
67#include <linux/errno.h>
68#include <linux/videodev.h>
69#include <media/v4l2-common.h>
70#include <media/v4l2-ioctl.h>
71#include <linux/usb.h>
72#include <linux/mutex.h>
73
74#include "stv680.h"
75
76static int video_nr = -1;
77
78static int swapRGB; /* 0 = default for auto select */
79
80/* 0 = default to allow auto select; -1 = swap never, +1 = swap always */
81static int swapRGB_on;
82
83static unsigned int debug;
84
85#define PDEBUG(level, fmt, args...) \
86 do { \
87 if (debug >= level) \
88 printk(KERN_INFO KBUILD_MODNAME " [%s:%d] \n" fmt, \
89 __func__, __LINE__ , ## args); \
90 } while (0)
91
92
93/*
94 * Version Information
95 */
96#define DRIVER_VERSION "v0.25"
97#define DRIVER_AUTHOR "Kevin Sisson <kjsisson@bellsouth.net>"
98#define DRIVER_DESC "STV0680 USB Camera Driver"
99
100MODULE_AUTHOR (DRIVER_AUTHOR);
101MODULE_DESCRIPTION (DRIVER_DESC);
102MODULE_LICENSE ("GPL");
103module_param(debug, int, S_IRUGO | S_IWUSR);
104MODULE_PARM_DESC (debug, "Debug enabled or not");
105module_param(swapRGB_on, int, 0);
106MODULE_PARM_DESC (swapRGB_on, "Red/blue swap: 1=always, 0=auto, -1=never");
107module_param(video_nr, int, 0);
108
109/********************************************************************
110 *
111 * Memory management
112 *
113 * This is a shameless copy from the USB-cpia driver (linux kernel
114 * version 2.3.29 or so, I have no idea what this code actually does ;).
115 * Actually it seems to be a copy of a shameless copy of the bttv-driver.
116 * Or that is a copy of a shameless copy of ... (To the powers: is there
117 * no generic kernel-function to do this sort of stuff?)
118 *
119 * Yes, it was a shameless copy from the bttv-driver. IIRC, Alan says
120 * there will be one, but apparentely not yet -jerdfelt
121 *
122 * So I copied it again for the ov511 driver -claudio
123 *
124 * Same for the se401 driver -Jeroen
125 *
126 * And the STV0680 driver - Kevin
127 ********************************************************************/
128static void *rvmalloc (unsigned long size)
129{
130 void *mem;
131 unsigned long adr;
132
133 size = PAGE_ALIGN(size);
134 mem = vmalloc_32 (size);
135 if (!mem)
136 return NULL;
137
138 memset (mem, 0, size); /* Clear the ram out, no junk to the user */
139 adr = (unsigned long) mem;
140 while (size > 0) {
141 SetPageReserved(vmalloc_to_page((void *)adr));
142 adr += PAGE_SIZE;
143 size -= PAGE_SIZE;
144 }
145 return mem;
146}
147
148static void rvfree (void *mem, unsigned long size)
149{
150 unsigned long adr;
151
152 if (!mem)
153 return;
154
155 adr = (unsigned long) mem;
156 while ((long) size > 0) {
157 ClearPageReserved(vmalloc_to_page((void *)adr));
158 adr += PAGE_SIZE;
159 size -= PAGE_SIZE;
160 }
161 vfree (mem);
162}
163
164
165/*********************************************************************
166 * pencam read/write functions
167 ********************************************************************/
168
169static int stv_sndctrl (int set, struct usb_stv *stv680, unsigned short req, unsigned short value, unsigned char *buffer, int size)
170{
171 int ret = -1;
172
173 switch (set) {
174 case 0: /* 0xc1 */
175 ret = usb_control_msg (stv680->udev,
176 usb_rcvctrlpipe (stv680->udev, 0),
177 req,
178 (USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
179 value, 0, buffer, size, PENCAM_TIMEOUT);
180 break;
181
182 case 1: /* 0x41 */
183 ret = usb_control_msg (stv680->udev,
184 usb_sndctrlpipe (stv680->udev, 0),
185 req,
186 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT),
187 value, 0, buffer, size, PENCAM_TIMEOUT);
188 break;
189
190 case 2: /* 0x80 */
191 ret = usb_control_msg (stv680->udev,
192 usb_rcvctrlpipe (stv680->udev, 0),
193 req,
194 (USB_DIR_IN | USB_RECIP_DEVICE),
195 value, 0, buffer, size, PENCAM_TIMEOUT);
196 break;
197
198 case 3: /* 0x40 */
199 ret = usb_control_msg (stv680->udev,
200 usb_sndctrlpipe (stv680->udev, 0),
201 req,
202 (USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE),
203 value, 0, buffer, size, PENCAM_TIMEOUT);
204 break;
205
206 }
207 if ((ret < 0) && (req != 0x0a)) {
208 PDEBUG (1, "STV(e): usb_control_msg error %i, request = 0x%x, error = %i", set, req, ret);
209 }
210 return ret;
211}
212
213static int stv_set_config (struct usb_stv *dev, int configuration, int interface, int alternate)
214{
215
216 if (configuration != dev->udev->actconfig->desc.bConfigurationValue
217 || usb_reset_configuration (dev->udev) < 0) {
218 PDEBUG (1, "STV(e): FAILED to reset configuration %i", configuration);
219 return -1;
220 }
221 if (usb_set_interface (dev->udev, interface, alternate) < 0) {
222 PDEBUG (1, "STV(e): FAILED to set alternate interface %i", alternate);
223 return -1;
224 }
225 return 0;
226}
227
228static int stv_stop_video (struct usb_stv *dev)
229{
230 int i;
231 unsigned char *buf;
232
233 buf = kmalloc (40, GFP_KERNEL);
234 if (buf == NULL) {
235 PDEBUG (0, "STV(e): Out of (small buf) memory");
236 return -1;
237 }
238
239 /* this is a high priority command; it stops all lower order commands */
240 if ((i = stv_sndctrl (1, dev, 0x04, 0x0000, buf, 0x0)) < 0) {
241 i = stv_sndctrl (0, dev, 0x80, 0, buf, 0x02); /* Get Last Error; 2 = busy */
242 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buf[0], buf[1]);
243 } else {
244 PDEBUG (1, "STV(i): Camera reset to idle mode.");
245 }
246
247 if ((i = stv_set_config (dev, 1, 0, 0)) < 0)
248 PDEBUG (1, "STV(e): Reset config during exit failed");
249
250 /* get current mode */
251 buf[0] = 0xf0;
252 if ((i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08)) != 0x08) /* get mode */
253 PDEBUG (0, "STV(e): Stop_video: problem setting original mode");
254 if (dev->origMode != buf[0]) {
255 memset (buf, 0, 8);
256 buf[0] = (unsigned char) dev->origMode;
257 if ((i = stv_sndctrl (3, dev, 0x07, 0x0100, buf, 0x08)) != 0x08) {
258 PDEBUG (0, "STV(e): Stop_video: Set_Camera_Mode failed");
259 i = -1;
260 }
261 buf[0] = 0xf0;
262 i = stv_sndctrl (0, dev, 0x87, 0, buf, 0x08);
263 if ((i != 0x08) || (buf[0] != dev->origMode)) {
264 PDEBUG (0, "STV(e): camera NOT set to original resolution.");
265 i = -1;
266 } else
267 PDEBUG (0, "STV(i): Camera set to original resolution");
268 }
269 /* origMode */
270 kfree(buf);
271 return i;
272}
273
274static int stv_set_video_mode (struct usb_stv *dev)
275{
276 int i, stop_video = 1;
277 unsigned char *buf;
278
279 buf = kmalloc (40, GFP_KERNEL);
280 if (buf == NULL) {
281 PDEBUG (0, "STV(e): Out of (small buf) memory");
282 return -1;
283 }
284
285 if ((i = stv_set_config (dev, 1, 0, 0)) < 0) {
286 kfree(buf);
287 return i;
288 }
289
290 i = stv_sndctrl (2, dev, 0x06, 0x0100, buf, 0x12);
291 if (!(i > 0) && (buf[8] == 0x53) && (buf[9] == 0x05)) {
292 PDEBUG (1, "STV(e): Could not get descriptor 0100.");
293 goto error;
294 }
295
296 /* set alternate interface 1 */
297 if ((i = stv_set_config (dev, 1, 0, 1)) < 0)
298 goto error;
299
300 if ((i = stv_sndctrl (0, dev, 0x85, 0, buf, 0x10)) != 0x10)
301 goto error;
302 PDEBUG (1, "STV(i): Setting video mode.");
303 /* Switch to Video mode: 0x0100 = VGA (640x480), 0x0000 = CIF (352x288) 0x0300 = QVGA (320x240) */
304 if ((i = stv_sndctrl (1, dev, 0x09, dev->VideoMode, buf, 0x0)) < 0) {
305 stop_video = 0;
306 goto error;
307 }
308 goto exit;
309
310error:
311 kfree(buf);
312 if (stop_video == 1)
313 stv_stop_video (dev);
314 return -1;
315
316exit:
317 kfree(buf);
318 return 0;
319}
320
321static int stv_init (struct usb_stv *stv680)
322{
323 int i = 0;
324 unsigned char *buffer;
325 unsigned long int bufsize;
326
327 buffer = kzalloc (40, GFP_KERNEL);
328 if (buffer == NULL) {
329 PDEBUG (0, "STV(e): Out of (small buf) memory");
330 return -1;
331 }
332 udelay (100);
333
334 /* set config 1, interface 0, alternate 0 */
335 if ((i = stv_set_config (stv680, 1, 0, 0)) < 0) {
336 kfree(buffer);
337 PDEBUG (0, "STV(e): set config 1,0,0 failed");
338 return -1;
339 }
340 /* ping camera to be sure STV0680 is present */
341 if ((i = stv_sndctrl (0, stv680, 0x88, 0x5678, buffer, 0x02)) != 0x02)
342 goto error;
343 if ((buffer[0] != 0x56) || (buffer[1] != 0x78)) {
344 PDEBUG (1, "STV(e): camera ping failed!!");
345 goto error;
346 }
347
348 /* get camera descriptor */
349 if ((i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x09)) != 0x09)
350 goto error;
351 i = stv_sndctrl (2, stv680, 0x06, 0x0200, buffer, 0x22);
352 if (!(i >= 0) && (buffer[7] == 0xa0) && (buffer[8] == 0x23)) {
353 PDEBUG (1, "STV(e): Could not get descriptor 0200.");
354 goto error;
355 }
356 if ((i = stv_sndctrl (0, stv680, 0x8a, 0, buffer, 0x02)) != 0x02)
357 goto error;
358 if ((i = stv_sndctrl (0, stv680, 0x8b, 0, buffer, 0x24)) != 0x24)
359 goto error;
360 if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
361 goto error;
362
363 stv680->SupportedModes = buffer[7];
364 i = stv680->SupportedModes;
365 stv680->CIF = 0;
366 stv680->VGA = 0;
367 stv680->QVGA = 0;
368 if (i & 1)
369 stv680->CIF = 1;
370 if (i & 2)
371 stv680->VGA = 1;
372 if (i & 8)
373 stv680->QVGA = 1;
374 if (stv680->SupportedModes == 0) {
375 PDEBUG (0, "STV(e): There are NO supported STV680 modes!!");
376 i = -1;
377 goto error;
378 } else {
379 if (stv680->CIF)
380 PDEBUG (0, "STV(i): CIF is supported");
381 if (stv680->QVGA)
382 PDEBUG (0, "STV(i): QVGA is supported");
383 }
384 /* FW rev, ASIC rev, sensor ID */
385 PDEBUG (1, "STV(i): Firmware rev is %i.%i", buffer[0], buffer[1]);
386 PDEBUG (1, "STV(i): ASIC rev is %i.%i", buffer[2], buffer[3]);
387 PDEBUG (1, "STV(i): Sensor ID is %i", (buffer[4]*16) + (buffer[5]>>4));
388
389 /* set alternate interface 1 */
390 if ((i = stv_set_config (stv680, 1, 0, 1)) < 0)
391 goto error;
392
393 if ((i = stv_sndctrl (0, stv680, 0x85, 0, buffer, 0x10)) != 0x10)
394 goto error;
395 if ((i = stv_sndctrl (0, stv680, 0x8d, 0, buffer, 0x08)) != 0x08)
396 goto error;
397 i = buffer[3];
398 PDEBUG (0, "STV(i): Camera has %i pictures.", i);
399
400 /* get current mode */
401 if ((i = stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08)) != 0x08)
402 goto error;
403 stv680->origMode = buffer[0]; /* 01 = VGA, 03 = QVGA, 00 = CIF */
404
405 /* This will attemp CIF mode, if supported. If not, set to QVGA */
406 memset (buffer, 0, 8);
407 if (stv680->CIF)
408 buffer[0] = 0x00;
409 else if (stv680->QVGA)
410 buffer[0] = 0x03;
411 if ((i = stv_sndctrl (3, stv680, 0x07, 0x0100, buffer, 0x08)) != 0x08) {
412 PDEBUG (0, "STV(i): Set_Camera_Mode failed");
413 i = -1;
414 goto error;
415 }
416 buffer[0] = 0xf0;
417 stv_sndctrl (0, stv680, 0x87, 0, buffer, 0x08);
418 if (((stv680->CIF == 1) && (buffer[0] != 0x00)) || ((stv680->QVGA == 1) && (buffer[0] != 0x03))) {
419 PDEBUG (0, "STV(e): Error setting camera video mode!");
420 i = -1;
421 goto error;
422 } else {
423 if (buffer[0] == 0) {
424 stv680->VideoMode = 0x0000;
425 PDEBUG (0, "STV(i): Video Mode set to CIF");
426 }
427 if (buffer[0] == 0x03) {
428 stv680->VideoMode = 0x0300;
429 PDEBUG (0, "STV(i): Video Mode set to QVGA");
430 }
431 }
432 if ((i = stv_sndctrl (0, stv680, 0x8f, 0, buffer, 0x10)) != 0x10)
433 goto error;
434 bufsize = (buffer[0] << 24) | (buffer[1] << 16) | (buffer[2] << 8) | (buffer[3]);
435 stv680->cwidth = (buffer[4] << 8) | (buffer[5]); /* ->camera = 322, 356, 644 */
436 stv680->cheight = (buffer[6] << 8) | (buffer[7]); /* ->camera = 242, 292, 484 */
437 stv680->origGain = buffer[12];
438
439 goto exit;
440
441error:
442 i = stv_sndctrl (0, stv680, 0x80, 0, buffer, 0x02); /* Get Last Error */
443 PDEBUG (1, "STV(i): last error: %i, command = 0x%x", buffer[0], buffer[1]);
444 kfree(buffer);
445 return -1;
446
447exit:
448 kfree(buffer);
449
450 /* video = 320x240, 352x288 */
451 if (stv680->CIF == 1) {
452 stv680->maxwidth = 352;
453 stv680->maxheight = 288;
454 stv680->vwidth = 352;
455 stv680->vheight = 288;
456 }
457 if (stv680->QVGA == 1) {
458 stv680->maxwidth = 320;
459 stv680->maxheight = 240;
460 stv680->vwidth = 320;
461 stv680->vheight = 240;
462 }
463
464 stv680->rawbufsize = bufsize; /* must be ./. by 8 */
465 stv680->maxframesize = bufsize * 3; /* RGB size */
466 PDEBUG (2, "STV(i): cwidth = %i, cheight = %i", stv680->cwidth, stv680->cheight);
467 PDEBUG (1, "STV(i): width = %i, height = %i, rawbufsize = %li", stv680->vwidth, stv680->vheight, stv680->rawbufsize);
468
469 /* some default values */
470 stv680->bulk_in_endpointAddr = 0x82;
471 stv680->dropped = 0;
472 stv680->error = 0;
473 stv680->framecount = 0;
474 stv680->readcount = 0;
475 stv680->streaming = 0;
476 /* bright, white, colour, hue, contrast are set by software, not in stv0680 */
477 stv680->brightness = 32767;
478 stv680->chgbright = 0;
479 stv680->whiteness = 0; /* only for greyscale */
480 stv680->colour = 32767;
481 stv680->contrast = 32767;
482 stv680->hue = 32767;
483 stv680->palette = STV_VIDEO_PALETTE;
484 stv680->depth = 24; /* rgb24 bits */
485 if ((swapRGB_on == 0) && (swapRGB == 0))
486 PDEBUG (1, "STV(i): swapRGB is (auto) OFF");
487 else if ((swapRGB_on == 0) && (swapRGB == 1))
488 PDEBUG (1, "STV(i): swapRGB is (auto) ON");
489 else if (swapRGB_on == 1)
490 PDEBUG (1, "STV(i): swapRGB is (forced) ON");
491 else if (swapRGB_on == -1)
492 PDEBUG (1, "STV(i): swapRGB is (forced) OFF");
493
494 if (stv_set_video_mode (stv680) < 0) {
495 PDEBUG (0, "STV(e): Could not set video mode in stv_init");
496 return -1;
497 }
498
499 return 0;
500}
501
502/***************** last of pencam routines *******************/
503
504/****************************************************************************
505 * sysfs
506 ***************************************************************************/
507#define stv680_file(name, variable, field) \
508static ssize_t show_##name(struct device *class_dev, \
509 struct device_attribute *attr, char *buf) \
510{ \
511 struct video_device *vdev = to_video_device(class_dev); \
512 struct usb_stv *stv = video_get_drvdata(vdev); \
513 return sprintf(buf, field, stv->variable); \
514} \
515static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
516
517stv680_file(model, camera_name, "%s\n");
518stv680_file(in_use, user, "%d\n");
519stv680_file(streaming, streaming, "%d\n");
520stv680_file(palette, palette, "%i\n");
521stv680_file(frames_total, readcount, "%d\n");
522stv680_file(frames_read, framecount, "%d\n");
523stv680_file(packets_dropped, dropped, "%d\n");
524stv680_file(decoding_errors, error, "%d\n");
525
526static int stv680_create_sysfs_files(struct video_device *vdev)
527{
528 int rc;
529
530 rc = device_create_file(&vdev->dev, &dev_attr_model);
531 if (rc) goto err;
532 rc = device_create_file(&vdev->dev, &dev_attr_in_use);
533 if (rc) goto err_model;
534 rc = device_create_file(&vdev->dev, &dev_attr_streaming);
535 if (rc) goto err_inuse;
536 rc = device_create_file(&vdev->dev, &dev_attr_palette);
537 if (rc) goto err_stream;
538 rc = device_create_file(&vdev->dev, &dev_attr_frames_total);
539 if (rc) goto err_pal;
540 rc = device_create_file(&vdev->dev, &dev_attr_frames_read);
541 if (rc) goto err_framtot;
542 rc = device_create_file(&vdev->dev, &dev_attr_packets_dropped);
543 if (rc) goto err_framread;
544 rc = device_create_file(&vdev->dev, &dev_attr_decoding_errors);
545 if (rc) goto err_dropped;
546
547 return 0;
548
549err_dropped:
550 device_remove_file(&vdev->dev, &dev_attr_packets_dropped);
551err_framread:
552 device_remove_file(&vdev->dev, &dev_attr_frames_read);
553err_framtot:
554 device_remove_file(&vdev->dev, &dev_attr_frames_total);
555err_pal:
556 device_remove_file(&vdev->dev, &dev_attr_palette);
557err_stream:
558 device_remove_file(&vdev->dev, &dev_attr_streaming);
559err_inuse:
560 device_remove_file(&vdev->dev, &dev_attr_in_use);
561err_model:
562 device_remove_file(&vdev->dev, &dev_attr_model);
563err:
564 PDEBUG(0, "STV(e): Could not create sysfs files");
565 return rc;
566}
567
568static void stv680_remove_sysfs_files(struct video_device *vdev)
569{
570 device_remove_file(&vdev->dev, &dev_attr_model);
571 device_remove_file(&vdev->dev, &dev_attr_in_use);
572 device_remove_file(&vdev->dev, &dev_attr_streaming);
573 device_remove_file(&vdev->dev, &dev_attr_palette);
574 device_remove_file(&vdev->dev, &dev_attr_frames_total);
575 device_remove_file(&vdev->dev, &dev_attr_frames_read);
576 device_remove_file(&vdev->dev, &dev_attr_packets_dropped);
577 device_remove_file(&vdev->dev, &dev_attr_decoding_errors);
578}
579
580/********************************************************************
581 * Camera control
582 *******************************************************************/
583
584static int stv680_get_pict (struct usb_stv *stv680, struct video_picture *p)
585{
586 /* This sets values for v4l interface. max/min = 65535/0 */
587
588 p->brightness = stv680->brightness;
589 p->whiteness = stv680->whiteness; /* greyscale */
590 p->colour = stv680->colour;
591 p->contrast = stv680->contrast;
592 p->hue = stv680->hue;
593 p->palette = stv680->palette;
594 p->depth = stv680->depth;
595 return 0;
596}
597
598static int stv680_set_pict (struct usb_stv *stv680, struct video_picture *p)
599{
600 /* See above stv680_get_pict */
601
602 if (p->palette != STV_VIDEO_PALETTE) {
603 PDEBUG (2, "STV(e): Palette set error in _set_pic");
604 return 1;
605 }
606
607 if (stv680->brightness != p->brightness) {
608 stv680->chgbright = 1;
609 stv680->brightness = p->brightness;
610 }
611
612 stv680->whiteness = p->whiteness; /* greyscale */
613 stv680->colour = p->colour;
614 stv680->contrast = p->contrast;
615 stv680->hue = p->hue;
616 stv680->palette = p->palette;
617 stv680->depth = p->depth;
618
619 return 0;
620}
621
622static void stv680_video_irq (struct urb *urb)
623{
624 struct usb_stv *stv680 = urb->context;
625 int length = urb->actual_length;
626
627 if (length < stv680->rawbufsize)
628 PDEBUG (2, "STV(i): Lost data in transfer: exp %li, got %i", stv680->rawbufsize, length);
629
630 /* ohoh... */
631 if (!stv680->streaming)
632 return;
633
634 if (!stv680->udev) {
635 PDEBUG (0, "STV(e): device vapourished in video_irq");
636 return;
637 }
638
639 /* 0 sized packets happen if we are to fast, but sometimes the camera
640 keeps sending them forever...
641 */
642 if (length && !urb->status) {
643 stv680->nullpackets = 0;
644 switch (stv680->scratch[stv680->scratch_next].state) {
645 case BUFFER_READY:
646 case BUFFER_BUSY:
647 stv680->dropped++;
648 break;
649
650 case BUFFER_UNUSED:
651 memcpy (stv680->scratch[stv680->scratch_next].data,
652 (unsigned char *) urb->transfer_buffer, length);
653 stv680->scratch[stv680->scratch_next].state = BUFFER_READY;
654 stv680->scratch[stv680->scratch_next].length = length;
655 if (waitqueue_active (&stv680->wq)) {
656 wake_up_interruptible (&stv680->wq);
657 }
658 stv680->scratch_overflow = 0;
659 stv680->scratch_next++;
660 if (stv680->scratch_next >= STV680_NUMSCRATCH)
661 stv680->scratch_next = 0;
662 break;
663 } /* switch */
664 } else {
665 stv680->nullpackets++;
666 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
667 if (waitqueue_active (&stv680->wq)) {
668 wake_up_interruptible (&stv680->wq);
669 }
670 }
671 } /* if - else */
672
673 /* Resubmit urb for new data */
674 urb->status = 0;
675 urb->dev = stv680->udev;
676 if (usb_submit_urb (urb, GFP_ATOMIC))
677 PDEBUG (0, "STV(e): urb burned down in video irq");
678 return;
679} /* _video_irq */
680
681static int stv680_start_stream (struct usb_stv *stv680)
682{
683 struct urb *urb;
684 int err = 0, i;
685
686 stv680->streaming = 1;
687
688 /* Do some memory allocation */
689 for (i = 0; i < STV680_NUMFRAMES; i++) {
690 stv680->frame[i].data = stv680->fbuf + i * stv680->maxframesize;
691 stv680->frame[i].curpix = 0;
692 }
693 /* packet size = 4096 */
694 for (i = 0; i < STV680_NUMSBUF; i++) {
695 stv680->sbuf[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
696 if (stv680->sbuf[i].data == NULL) {
697 PDEBUG (0, "STV(e): Could not kmalloc raw data buffer %i", i);
698 goto nomem_err;
699 }
700 }
701
702 stv680->scratch_next = 0;
703 stv680->scratch_use = 0;
704 stv680->scratch_overflow = 0;
705 for (i = 0; i < STV680_NUMSCRATCH; i++) {
706 stv680->scratch[i].data = kmalloc (stv680->rawbufsize, GFP_KERNEL);
707 if (stv680->scratch[i].data == NULL) {
708 PDEBUG (0, "STV(e): Could not kmalloc raw scratch buffer %i", i);
709 goto nomem_err;
710 }
711 stv680->scratch[i].state = BUFFER_UNUSED;
712 }
713
714 for (i = 0; i < STV680_NUMSBUF; i++) {
715 urb = usb_alloc_urb (0, GFP_KERNEL);
716 if (!urb)
717 goto nomem_err;
718
719 /* sbuf is urb->transfer_buffer, later gets memcpyed to scratch */
720 usb_fill_bulk_urb (urb, stv680->udev,
721 usb_rcvbulkpipe (stv680->udev, stv680->bulk_in_endpointAddr),
722 stv680->sbuf[i].data, stv680->rawbufsize,
723 stv680_video_irq, stv680);
724 stv680->urb[i] = urb;
725 err = usb_submit_urb (stv680->urb[i], GFP_KERNEL);
726 if (err) {
727 PDEBUG (0, "STV(e): urb burned down with err "
728 "%d in start stream %d", err, i);
729 goto nomem_err;
730 }
731 } /* i STV680_NUMSBUF */
732
733 stv680->framecount = 0;
734 return 0;
735
736 nomem_err:
737 for (i = 0; i < STV680_NUMSCRATCH; i++) {
738 kfree(stv680->scratch[i].data);
739 stv680->scratch[i].data = NULL;
740 }
741 for (i = 0; i < STV680_NUMSBUF; i++) {
742 usb_kill_urb(stv680->urb[i]);
743 usb_free_urb(stv680->urb[i]);
744 stv680->urb[i] = NULL;
745 kfree(stv680->sbuf[i].data);
746 stv680->sbuf[i].data = NULL;
747 }
748 return -ENOMEM;
749
750}
751
752static int stv680_stop_stream (struct usb_stv *stv680)
753{
754 int i;
755
756 if (!stv680->streaming || !stv680->udev)
757 return 1;
758
759 stv680->streaming = 0;
760
761 for (i = 0; i < STV680_NUMSBUF; i++)
762 if (stv680->urb[i]) {
763 usb_kill_urb (stv680->urb[i]);
764 usb_free_urb (stv680->urb[i]);
765 stv680->urb[i] = NULL;
766 kfree(stv680->sbuf[i].data);
767 }
768 for (i = 0; i < STV680_NUMSCRATCH; i++) {
769 kfree(stv680->scratch[i].data);
770 stv680->scratch[i].data = NULL;
771 }
772
773 return 0;
774}
775
776static int stv680_set_size (struct usb_stv *stv680, int width, int height)
777{
778 int wasstreaming = stv680->streaming;
779
780 /* Check to see if we need to change */
781 if ((stv680->vwidth == width) && (stv680->vheight == height))
782 return 0;
783
784 PDEBUG (1, "STV(i): size request for %i x %i", width, height);
785 /* Check for a valid mode */
786 if ((!width || !height) || ((width & 1) || (height & 1))) {
787 PDEBUG (1, "STV(e): set_size error: request: v.width = %i, v.height = %i actual: stv.width = %i, stv.height = %i", width, height, stv680->vwidth, stv680->vheight);
788 return 1;
789 }
790
791 if ((width < (stv680->maxwidth / 2)) || (height < (stv680->maxheight / 2))) {
792 width = stv680->maxwidth / 2;
793 height = stv680->maxheight / 2;
794 } else if ((width >= 158) && (width <= 166) && (stv680->QVGA == 1)) {
795 width = 160;
796 height = 120;
797 } else if ((width >= 172) && (width <= 180) && (stv680->CIF == 1)) {
798 width = 176;
799 height = 144;
800 } else if ((width >= 318) && (width <= 350) && (stv680->QVGA == 1)) {
801 width = 320;
802 height = 240;
803 } else if ((width >= 350) && (width <= 358) && (stv680->CIF == 1)) {
804 width = 352;
805 height = 288;
806 } else {
807 PDEBUG (1, "STV(e): request for non-supported size: request: v.width = %i, v.height = %i actual: stv.width = %i, stv.height = %i", width, height, stv680->vwidth, stv680->vheight);
808 return 1;
809 }
810
811 /* Stop a current stream and start it again at the new size */
812 if (wasstreaming)
813 stv680_stop_stream (stv680);
814 stv680->vwidth = width;
815 stv680->vheight = height;
816 PDEBUG (1, "STV(i): size set to %i x %i", stv680->vwidth, stv680->vheight);
817 if (wasstreaming)
818 stv680_start_stream (stv680);
819
820 return 0;
821}
822
823/**********************************************************************
824 * Video Decoding
825 **********************************************************************/
826
827/******* routines from the pencam program; hey, they work! ********/
828
829/*
830 * STV0680 Vision Camera Chipset Driver
831 * Copyright (C) 2000 Adam Harrison <adam@antispin.org>
832*/
833
834#define RED 0
835#define GREEN 1
836#define BLUE 2
837#define AD(x, y, w) (((y)*(w)+(x))*3)
838
839static void bayer_unshuffle (struct usb_stv *stv680, struct stv680_scratch *buffer)
840{
841 int x, y, i;
842 int w = stv680->cwidth;
843 int vw = stv680->cwidth, vh = stv680->cheight;
844 unsigned int p = 0;
845 int colour = 0, bayer = 0;
846 unsigned char *raw = buffer->data;
847 struct stv680_frame *frame = &stv680->frame[stv680->curframe];
848 unsigned char *output = frame->data;
849 unsigned char *temp = frame->data;
850 int offset = buffer->offset;
851
852 if (frame->curpix == 0) {
853 if (frame->grabstate == FRAME_READY) {
854 frame->grabstate = FRAME_GRABBING;
855 }
856 }
857 if (offset != frame->curpix) { /* Regard frame as lost :( */
858 frame->curpix = 0;
859 stv680->error++;
860 return;
861 }
862
863 if ((stv680->vwidth == 320) || (stv680->vwidth == 160)) {
864 vw = 320;
865 vh = 240;
866 }
867 if ((stv680->vwidth == 352) || (stv680->vwidth == 176)) {
868 vw = 352;
869 vh = 288;
870 }
871
872 memset (output, 0, 3 * vw * vh); /* clear output matrix. */
873
874 for (y = 0; y < vh; y++) {
875 for (x = 0; x < vw; x++) {
876 if (x & 1)
877 p = *(raw + y * w + (x >> 1));
878 else
879 p = *(raw + y * w + (x >> 1) + (w >> 1));
880
881 if (y & 1)
882 bayer = 2;
883 else
884 bayer = 0;
885 if (x & 1)
886 bayer++;
887
888 switch (bayer) {
889 case 0:
890 case 3:
891 colour = 1;
892 break;
893 case 1:
894 colour = 0;
895 break;
896 case 2:
897 colour = 2;
898 break;
899 }
900 i = (y * vw + x) * 3;
901 *(output + i + colour) = (unsigned char) p;
902 } /* for x */
903
904 } /* for y */
905
906 /****** gamma correction plus hardcoded white balance */
907 /* Thanks to Alexander Schwartx <alexander.schwartx@gmx.net> for this code.
908 Correction values red[], green[], blue[], are generated by
909 (pow(i/256.0, GAMMA)*255.0)*white balanceRGB where GAMMA=0.55, 1<i<255.
910 White balance (RGB)= 1.0, 1.17, 1.48. Values are calculated as double float and
911 converted to unsigned char. Values are in stv680.h */
912
913 for (y = 0; y < vh; y++) {
914 for (x = 0; x < vw; x++) {
915 i = (y * vw + x) * 3;
916 *(output + i) = red[*(output + i)];
917 *(output + i + 1) = green[*(output + i + 1)];
918 *(output + i + 2) = blue[*(output + i + 2)];
919 }
920 }
921
922 /****** bayer demosaic ******/
923 for (y = 1; y < (vh - 1); y++) {
924 for (x = 1; x < (vw - 1); x++) { /* work out pixel type */
925 if (y & 1)
926 bayer = 0;
927 else
928 bayer = 2;
929 if (!(x & 1))
930 bayer++;
931
932 switch (bayer) {
933 case 0: /* green. blue lr, red tb */
934 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y, vw) + BLUE) + (int) *(output + AD (x + 1, y, vw) + BLUE)) >> 1;
935 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x, y - 1, vw) + RED) + (int) *(output + AD (x, y + 1, vw) + RED)) >> 1;
936 break;
937
938 case 1: /* blue. green lrtb, red diagonals */
939 *(output + AD (x, y, vw) + GREEN) = ((int) *(output + AD (x - 1, y, vw) + GREEN) + (int) *(output + AD (x + 1, y, vw) + GREEN) + (int) *(output + AD (x, y - 1, vw) + GREEN) + (int) *(output + AD (x, y + 1, vw) + GREEN)) >> 2;
940 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y - 1, vw) + RED) + (int) *(output + AD (x - 1, y + 1, vw) + RED) + (int) *(output + AD (x + 1, y - 1, vw) + RED) + (int) *(output + AD (x + 1, y + 1, vw) + RED)) >> 2;
941 break;
942
943 case 2: /* red. green lrtb, blue diagonals */
944 *(output + AD (x, y, vw) + GREEN) = ((int) *(output + AD (x - 1, y, vw) + GREEN) + (int) *(output + AD (x + 1, y, vw) + GREEN) + (int) *(output + AD (x, y - 1, vw) + GREEN) + (int) *(output + AD (x, y + 1, vw) + GREEN)) >> 2;
945 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x - 1, y - 1, vw) + BLUE) + (int) *(output + AD (x + 1, y - 1, vw) + BLUE) + (int) *(output + AD (x - 1, y + 1, vw) + BLUE) + (int) *(output + AD (x + 1, y + 1, vw) + BLUE)) >> 2;
946 break;
947
948 case 3: /* green. red lr, blue tb */
949 *(output + AD (x, y, vw) + RED) = ((int) *(output + AD (x - 1, y, vw) + RED) + (int) *(output + AD (x + 1, y, vw) + RED)) >> 1;
950 *(output + AD (x, y, vw) + BLUE) = ((int) *(output + AD (x, y - 1, vw) + BLUE) + (int) *(output + AD (x, y + 1, vw) + BLUE)) >> 1;
951 break;
952 } /* switch */
953 } /* for x */
954 } /* for y - end demosaic */
955
956 /* fix top and bottom row, left and right side */
957 i = vw * 3;
958 memcpy (output, (output + i), i);
959 memcpy ((output + (vh * i)), (output + ((vh - 1) * i)), i);
960 for (y = 0; y < vh; y++) {
961 i = y * vw * 3;
962 memcpy ((output + i), (output + i + 3), 3);
963 memcpy ((output + i + (vw * 3)), (output + i + (vw - 1) * 3), 3);
964 }
965
966 /* process all raw data, then trim to size if necessary */
967 if ((stv680->vwidth == 160) || (stv680->vwidth == 176)) {
968 i = 0;
969 for (y = 0; y < vh; y++) {
970 if (!(y & 1)) {
971 for (x = 0; x < vw; x++) {
972 p = (y * vw + x) * 3;
973 if (!(x & 1)) {
974 *(output + i) = *(output + p);
975 *(output + i + 1) = *(output + p + 1);
976 *(output + i + 2) = *(output + p + 2);
977 i += 3;
978 }
979 } /* for x */
980 }
981 } /* for y */
982 }
983 /* reset to proper width */
984 if ((stv680->vwidth == 160)) {
985 vw = 160;
986 vh = 120;
987 }
988 if ((stv680->vwidth == 176)) {
989 vw = 176;
990 vh = 144;
991 }
992
993 /* output is RGB; some programs want BGR */
994 /* swapRGB_on=0 -> program decides; swapRGB_on=1, always swap */
995 /* swapRGB_on=-1, never swap */
996 if (((swapRGB == 1) && (swapRGB_on != -1)) || (swapRGB_on == 1)) {
997 for (y = 0; y < vh; y++) {
998 for (x = 0; x < vw; x++) {
999 i = (y * vw + x) * 3;
1000 *(temp) = *(output + i);
1001 *(output + i) = *(output + i + 2);
1002 *(output + i + 2) = *(temp);
1003 }
1004 }
1005 }
1006 /* brightness */
1007 if (stv680->chgbright == 1) {
1008 if (stv680->brightness >= 32767) {
1009 p = (stv680->brightness - 32767) / 256;
1010 for (x = 0; x < (vw * vh * 3); x++) {
1011 if ((*(output + x) + (unsigned char) p) > 255)
1012 *(output + x) = 255;
1013 else
1014 *(output + x) += (unsigned char) p;
1015 } /* for */
1016 } else {
1017 p = (32767 - stv680->brightness) / 256;
1018 for (x = 0; x < (vw * vh * 3); x++) {
1019 if ((unsigned char) p > *(output + x))
1020 *(output + x) = 0;
1021 else
1022 *(output + x) -= (unsigned char) p;
1023 } /* for */
1024 } /* else */
1025 }
1026 /* if */
1027 frame->curpix = 0;
1028 frame->curlinepix = 0;
1029 frame->grabstate = FRAME_DONE;
1030 stv680->framecount++;
1031 stv680->readcount++;
1032 if (stv680->frame[(stv680->curframe + 1) & (STV680_NUMFRAMES - 1)].grabstate == FRAME_READY) {
1033 stv680->curframe = (stv680->curframe + 1) & (STV680_NUMFRAMES - 1);
1034 }
1035
1036} /* bayer_unshuffle */
1037
1038/******* end routines from the pencam program *********/
1039
1040static int stv680_newframe (struct usb_stv *stv680, int framenr)
1041{
1042 int errors = 0;
1043
1044 while (stv680->streaming && (stv680->frame[framenr].grabstate == FRAME_READY || stv680->frame[framenr].grabstate == FRAME_GRABBING)) {
1045 if (!stv680->frame[framenr].curpix) {
1046 errors++;
1047 }
1048 wait_event_interruptible (stv680->wq, (stv680->scratch[stv680->scratch_use].state == BUFFER_READY));
1049
1050 if (stv680->nullpackets > STV680_MAX_NULLPACKETS) {
1051 stv680->nullpackets = 0;
1052 PDEBUG (2, "STV(i): too many null length packets, restarting capture");
1053 stv680_stop_stream (stv680);
1054 stv680_start_stream (stv680);
1055 } else {
1056 if (stv680->scratch[stv680->scratch_use].state != BUFFER_READY) {
1057 stv680->frame[framenr].grabstate = FRAME_ERROR;
1058 PDEBUG (2, "STV(e): FRAME_ERROR in _newframe");
1059 return -EIO;
1060 }
1061 stv680->scratch[stv680->scratch_use].state = BUFFER_BUSY;
1062
1063 bayer_unshuffle (stv680, &stv680->scratch[stv680->scratch_use]);
1064
1065 stv680->scratch[stv680->scratch_use].state = BUFFER_UNUSED;
1066 stv680->scratch_use++;
1067 if (stv680->scratch_use >= STV680_NUMSCRATCH)
1068 stv680->scratch_use = 0;
1069 if (errors > STV680_MAX_ERRORS) {
1070 errors = 0;
1071 PDEBUG (2, "STV(i): too many errors, restarting capture");
1072 stv680_stop_stream (stv680);
1073 stv680_start_stream (stv680);
1074 }
1075 } /* else */
1076 } /* while */
1077 return 0;
1078}
1079
1080/*********************************************************************
1081 * Video4Linux
1082 *********************************************************************/
1083
1084static int stv_open(struct file *file)
1085{
1086 struct video_device *dev = video_devdata(file);
1087 struct usb_stv *stv680 = video_get_drvdata(dev);
1088 int err = 0;
1089
1090 /* we are called with the BKL held */
1091 lock_kernel();
1092 stv680->user = 1;
1093 err = stv_init (stv680); /* main initialization routine for camera */
1094
1095 if (err >= 0) {
1096 stv680->fbuf = rvmalloc (stv680->maxframesize * STV680_NUMFRAMES);
1097 if (!stv680->fbuf) {
1098 PDEBUG (0, "STV(e): Could not rvmalloc frame bufer");
1099 err = -ENOMEM;
1100 }
1101 file->private_data = dev;
1102 }
1103 if (err)
1104 stv680->user = 0;
1105 unlock_kernel();
1106
1107 return err;
1108}
1109
1110static int stv_close(struct file *file)
1111{
1112 struct video_device *dev = file->private_data;
1113 struct usb_stv *stv680 = video_get_drvdata(dev);
1114 int i;
1115
1116 for (i = 0; i < STV680_NUMFRAMES; i++)
1117 stv680->frame[i].grabstate = FRAME_UNUSED;
1118 if (stv680->streaming)
1119 stv680_stop_stream (stv680);
1120
1121 if ((i = stv_stop_video (stv680)) < 0)
1122 PDEBUG (1, "STV(e): stop_video failed in stv_close");
1123
1124 rvfree (stv680->fbuf, stv680->maxframesize * STV680_NUMFRAMES);
1125 stv680->user = 0;
1126
1127 if (stv680->removed) {
1128 kfree(stv680);
1129 stv680 = NULL;
1130 PDEBUG (0, "STV(i): device unregistered");
1131 }
1132 file->private_data = NULL;
1133 return 0;
1134}
1135
1136static long stv680_do_ioctl(struct file *file, unsigned int cmd, void *arg)
1137{
1138 struct video_device *vdev = file->private_data;
1139 struct usb_stv *stv680 = video_get_drvdata(vdev);
1140
1141 if (!stv680->udev)
1142 return -EIO;
1143
1144 switch (cmd) {
1145 case VIDIOCGCAP:{
1146 struct video_capability *b = arg;
1147
1148 strcpy (b->name, stv680->camera_name);
1149 b->type = VID_TYPE_CAPTURE;
1150 b->channels = 1;
1151 b->audios = 0;
1152 b->maxwidth = stv680->maxwidth;
1153 b->maxheight = stv680->maxheight;
1154 b->minwidth = stv680->maxwidth / 2;
1155 b->minheight = stv680->maxheight / 2;
1156 return 0;
1157 }
1158 case VIDIOCGCHAN:{
1159 struct video_channel *v = arg;
1160
1161 if (v->channel != 0)
1162 return -EINVAL;
1163 v->flags = 0;
1164 v->tuners = 0;
1165 v->type = VIDEO_TYPE_CAMERA;
1166 strcpy (v->name, "STV Camera");
1167 return 0;
1168 }
1169 case VIDIOCSCHAN:{
1170 struct video_channel *v = arg;
1171 if (v->channel != 0)
1172 return -EINVAL;
1173 return 0;
1174 }
1175 case VIDIOCGPICT:{
1176 struct video_picture *p = arg;
1177
1178 stv680_get_pict (stv680, p);
1179 return 0;
1180 }
1181 case VIDIOCSPICT:{
1182 struct video_picture *p = arg;
1183
1184 if (stv680_set_pict (stv680, p))
1185 return -EINVAL;
1186 return 0;
1187 }
1188 case VIDIOCSWIN:{
1189 struct video_window *vw = arg;
1190
1191 if (vw->flags)
1192 return -EINVAL;
1193 if (vw->clipcount)
1194 return -EINVAL;
1195 if (vw->width != stv680->vwidth) {
1196 if (stv680_set_size (stv680, vw->width, vw->height)) {
1197 PDEBUG (2, "STV(e): failed (from user) set size in VIDIOCSWIN");
1198 return -EINVAL;
1199 }
1200 }
1201 return 0;
1202 }
1203 case VIDIOCGWIN:{
1204 struct video_window *vw = arg;
1205
1206 vw->x = 0; /* FIXME */
1207 vw->y = 0;
1208 vw->chromakey = 0;
1209 vw->flags = 0;
1210 vw->clipcount = 0;
1211 vw->width = stv680->vwidth;
1212 vw->height = stv680->vheight;
1213 return 0;
1214 }
1215 case VIDIOCGMBUF:{
1216 struct video_mbuf *vm = arg;
1217 int i;
1218
1219 memset (vm, 0, sizeof (*vm));
1220 vm->size = STV680_NUMFRAMES * stv680->maxframesize;
1221 vm->frames = STV680_NUMFRAMES;
1222 for (i = 0; i < STV680_NUMFRAMES; i++)
1223 vm->offsets[i] = stv680->maxframesize * i;
1224 return 0;
1225 }
1226 case VIDIOCMCAPTURE:{
1227 struct video_mmap *vm = arg;
1228
1229 if (vm->format != STV_VIDEO_PALETTE) {
1230 PDEBUG (2, "STV(i): VIDIOCMCAPTURE vm.format (%i) != VIDEO_PALETTE (%i)",
1231 vm->format, STV_VIDEO_PALETTE);
1232 if ((vm->format == 3) && (swapRGB_on == 0)) {
1233 PDEBUG (2, "STV(i): VIDIOCMCAPTURE swapRGB is (auto) ON");
1234 /* this may fix those apps (e.g., xawtv) that want BGR */
1235 swapRGB = 1;
1236 }
1237 return -EINVAL;
1238 }
1239 if (vm->frame >= STV680_NUMFRAMES) {
1240 PDEBUG (2, "STV(e): VIDIOCMCAPTURE vm.frame > NUMFRAMES");
1241 return -EINVAL;
1242 }
1243 if ((stv680->frame[vm->frame].grabstate == FRAME_ERROR)
1244 || (stv680->frame[vm->frame].grabstate == FRAME_GRABBING)) {
1245 PDEBUG (2, "STV(e): VIDIOCMCAPTURE grabstate (%i) error",
1246 stv680->frame[vm->frame].grabstate);
1247 return -EBUSY;
1248 }
1249 /* Is this according to the v4l spec??? */
1250 if (stv680->vwidth != vm->width) {
1251 if (stv680_set_size (stv680, vm->width, vm->height)) {
1252 PDEBUG (2, "STV(e): VIDIOCMCAPTURE set_size failed");
1253 return -EINVAL;
1254 }
1255 }
1256 stv680->frame[vm->frame].grabstate = FRAME_READY;
1257
1258 if (!stv680->streaming)
1259 stv680_start_stream (stv680);
1260
1261 return 0;
1262 }
1263 case VIDIOCSYNC:{
1264 int *frame = arg;
1265 int ret = 0;
1266
1267 if (*frame < 0 || *frame >= STV680_NUMFRAMES) {
1268 PDEBUG (2, "STV(e): Bad frame # in VIDIOCSYNC");
1269 return -EINVAL;
1270 }
1271 ret = stv680_newframe (stv680, *frame);
1272 stv680->frame[*frame].grabstate = FRAME_UNUSED;
1273 return ret;
1274 }
1275 case VIDIOCGFBUF:{
1276 struct video_buffer *vb = arg;
1277
1278 memset (vb, 0, sizeof (*vb));
1279 return 0;
1280 }
1281 case VIDIOCKEY:
1282 return 0;
1283 case VIDIOCCAPTURE:
1284 {
1285 PDEBUG (2, "STV(e): VIDIOCCAPTURE failed");
1286 return -EINVAL;
1287 }
1288 case VIDIOCSFBUF:
1289 case VIDIOCGTUNER:
1290 case VIDIOCSTUNER:
1291 case VIDIOCGFREQ:
1292 case VIDIOCSFREQ:
1293 case VIDIOCGAUDIO:
1294 case VIDIOCSAUDIO:
1295 return -EINVAL;
1296 default:
1297 return -ENOIOCTLCMD;
1298 } /* end switch */
1299
1300 return 0;
1301}
1302
1303static long stv680_ioctl(struct file *file,
1304 unsigned int cmd, unsigned long arg)
1305{
1306 return video_usercopy(file, cmd, arg, stv680_do_ioctl);
1307}
1308
1309static int stv680_mmap (struct file *file, struct vm_area_struct *vma)
1310{
1311 struct video_device *dev = file->private_data;
1312 struct usb_stv *stv680 = video_get_drvdata(dev);
1313 unsigned long start = vma->vm_start;
1314 unsigned long size = vma->vm_end-vma->vm_start;
1315 unsigned long page, pos;
1316
1317 mutex_lock(&stv680->lock);
1318
1319 if (stv680->udev == NULL) {
1320 mutex_unlock(&stv680->lock);
1321 return -EIO;
1322 }
1323 if (size > (((STV680_NUMFRAMES * stv680->maxframesize) + PAGE_SIZE - 1)
1324 & ~(PAGE_SIZE - 1))) {
1325 mutex_unlock(&stv680->lock);
1326 return -EINVAL;
1327 }
1328 pos = (unsigned long) stv680->fbuf;
1329 while (size > 0) {
1330 page = vmalloc_to_pfn((void *)pos);
1331 if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
1332 mutex_unlock(&stv680->lock);
1333 return -EAGAIN;
1334 }
1335 start += PAGE_SIZE;
1336 pos += PAGE_SIZE;
1337 if (size > PAGE_SIZE)
1338 size -= PAGE_SIZE;
1339 else
1340 size = 0;
1341 }
1342 mutex_unlock(&stv680->lock);
1343
1344 return 0;
1345}
1346
1347static ssize_t stv680_read (struct file *file, char __user *buf,
1348 size_t count, loff_t *ppos)
1349{
1350 struct video_device *dev = file->private_data;
1351 unsigned long int realcount = count;
1352 int ret = 0;
1353 struct usb_stv *stv680 = video_get_drvdata(dev);
1354 unsigned long int i;
1355
1356 if (STV680_NUMFRAMES != 2) {
1357 PDEBUG (0, "STV(e): STV680_NUMFRAMES needs to be 2!");
1358 return -1;
1359 }
1360 if (stv680->udev == NULL)
1361 return -EIO;
1362 if (realcount > (stv680->vwidth * stv680->vheight * 3))
1363 realcount = stv680->vwidth * stv680->vheight * 3;
1364
1365 /* Shouldn't happen: */
1366 if (stv680->frame[0].grabstate == FRAME_GRABBING) {
1367 PDEBUG (2, "STV(e): FRAME_GRABBING in stv680_read");
1368 return -EBUSY;
1369 }
1370 stv680->frame[0].grabstate = FRAME_READY;
1371 stv680->frame[1].grabstate = FRAME_UNUSED;
1372 stv680->curframe = 0;
1373
1374 if (!stv680->streaming)
1375 stv680_start_stream (stv680);
1376
1377 if (!stv680->streaming) {
1378 ret = stv680_newframe (stv680, 0); /* ret should = 0 */
1379 }
1380
1381 ret = stv680_newframe (stv680, 0);
1382
1383 if (!ret) {
1384 if ((i = copy_to_user (buf, stv680->frame[0].data, realcount)) != 0) {
1385 PDEBUG (2, "STV(e): copy_to_user frame 0 failed, ret count = %li", i);
1386 return -EFAULT;
1387 }
1388 } else {
1389 realcount = ret;
1390 }
1391 stv680->frame[0].grabstate = FRAME_UNUSED;
1392 return realcount;
1393} /* stv680_read */
1394
1395static const struct v4l2_file_operations stv680_fops = {
1396 .owner = THIS_MODULE,
1397 .open = stv_open,
1398 .release = stv_close,
1399 .read = stv680_read,
1400 .mmap = stv680_mmap,
1401 .ioctl = stv680_ioctl,
1402};
1403static struct video_device stv680_template = {
1404 .name = "STV0680 USB camera",
1405 .fops = &stv680_fops,
1406 .release = video_device_release,
1407 .minor = -1,
1408};
1409
1410static int stv680_probe (struct usb_interface *intf, const struct usb_device_id *id)
1411{
1412 struct usb_device *dev = interface_to_usbdev(intf);
1413 struct usb_host_interface *interface;
1414 struct usb_stv *stv680 = NULL;
1415 char *camera_name = NULL;
1416 int retval = 0;
1417
1418 /* We don't handle multi-config cameras */
1419 if (dev->descriptor.bNumConfigurations != 1) {
1420 PDEBUG (0, "STV(e): Number of Configurations != 1");
1421 return -ENODEV;
1422 }
1423
1424 interface = &intf->altsetting[0];
1425 /* Is it a STV680? */
1426 if ((le16_to_cpu(dev->descriptor.idVendor) == USB_PENCAM_VENDOR_ID) &&
1427 (le16_to_cpu(dev->descriptor.idProduct) == USB_PENCAM_PRODUCT_ID)) {
1428 camera_name = "STV0680";
1429 PDEBUG (0, "STV(i): STV0680 camera found.");
1430 } else if ((le16_to_cpu(dev->descriptor.idVendor) == USB_CREATIVEGOMINI_VENDOR_ID) &&
1431 (le16_to_cpu(dev->descriptor.idProduct) == USB_CREATIVEGOMINI_PRODUCT_ID)) {
1432 camera_name = "Creative WebCam Go Mini";
1433 PDEBUG (0, "STV(i): Creative WebCam Go Mini found.");
1434 } else {
1435 PDEBUG (0, "STV(e): Vendor/Product ID do not match STV0680 or Creative WebCam Go Mini values.");
1436 PDEBUG (0, "STV(e): Check that the STV0680 or Creative WebCam Go Mini camera is connected to the computer.");
1437 retval = -ENODEV;
1438 goto error;
1439 }
1440 /* We found one */
1441 if ((stv680 = kzalloc (sizeof (*stv680), GFP_KERNEL)) == NULL) {
1442 PDEBUG (0, "STV(e): couldn't kmalloc stv680 struct.");
1443 retval = -ENOMEM;
1444 goto error;
1445 }
1446
1447 stv680->udev = dev;
1448 stv680->camera_name = camera_name;
1449
1450 stv680->vdev = video_device_alloc();
1451 if (!stv680->vdev) {
1452 retval = -ENOMEM;
1453 goto error;
1454 }
1455 memcpy(stv680->vdev, &stv680_template, sizeof(stv680_template));
1456 stv680->vdev->parent = &intf->dev;
1457 video_set_drvdata(stv680->vdev, stv680);
1458
1459 memcpy (stv680->vdev->name, stv680->camera_name, strlen (stv680->camera_name));
1460 init_waitqueue_head (&stv680->wq);
1461 mutex_init (&stv680->lock);
1462 wmb ();
1463
1464 if (video_register_device(stv680->vdev, VFL_TYPE_GRABBER, video_nr) < 0) {
1465 PDEBUG (0, "STV(e): video_register_device failed");
1466 retval = -EIO;
1467 goto error_vdev;
1468 }
1469 PDEBUG(0, "STV(i): registered new video device: video%d",
1470 stv680->vdev->num);
1471
1472 usb_set_intfdata (intf, stv680);
1473 retval = stv680_create_sysfs_files(stv680->vdev);
1474 if (retval)
1475 goto error_unreg;
1476 return 0;
1477
1478error_unreg:
1479 video_unregister_device(stv680->vdev);
1480error_vdev:
1481 video_device_release(stv680->vdev);
1482error:
1483 kfree(stv680);
1484 return retval;
1485}
1486
1487static inline void usb_stv680_remove_disconnected (struct usb_stv *stv680)
1488{
1489 int i;
1490
1491 stv680->udev = NULL;
1492 stv680->frame[0].grabstate = FRAME_ERROR;
1493 stv680->frame[1].grabstate = FRAME_ERROR;
1494 stv680->streaming = 0;
1495
1496 wake_up_interruptible (&stv680->wq);
1497
1498 for (i = 0; i < STV680_NUMSBUF; i++)
1499 if (stv680->urb[i]) {
1500 usb_kill_urb (stv680->urb[i]);
1501 usb_free_urb (stv680->urb[i]);
1502 stv680->urb[i] = NULL;
1503 kfree(stv680->sbuf[i].data);
1504 }
1505 for (i = 0; i < STV680_NUMSCRATCH; i++)
1506 kfree(stv680->scratch[i].data);
1507 PDEBUG (0, "STV(i): %s disconnected", stv680->camera_name);
1508
1509 /* Free the memory */
1510 kfree(stv680);
1511}
1512
1513static void stv680_disconnect (struct usb_interface *intf)
1514{
1515 struct usb_stv *stv680 = usb_get_intfdata (intf);
1516
1517 usb_set_intfdata (intf, NULL);
1518
1519 if (stv680) {
1520 /* We don't want people trying to open up the device */
1521 if (stv680->vdev) {
1522 stv680_remove_sysfs_files(stv680->vdev);
1523 video_unregister_device(stv680->vdev);
1524 stv680->vdev = NULL;
1525 }
1526 if (!stv680->user) {
1527 usb_stv680_remove_disconnected (stv680);
1528 } else {
1529 stv680->removed = 1;
1530 }
1531 }
1532}
1533
1534static struct usb_driver stv680_driver = {
1535 .name = "stv680",
1536 .probe = stv680_probe,
1537 .disconnect = stv680_disconnect,
1538 .id_table = device_table
1539};
1540
1541/********************************************************************
1542 * Module routines
1543 ********************************************************************/
1544
1545static int __init usb_stv680_init (void)
1546{
1547 if (usb_register (&stv680_driver) < 0) {
1548 PDEBUG (0, "STV(e): Could not setup STV0680 driver");
1549 return -1;
1550 }
1551 PDEBUG (0, "STV(i): usb camera driver version %s registering", DRIVER_VERSION);
1552
1553 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
1554 DRIVER_DESC "\n");
1555 return 0;
1556}
1557
1558static void __exit usb_stv680_exit (void)
1559{
1560 usb_deregister (&stv680_driver);
1561 PDEBUG (0, "STV(i): driver deregistered");
1562}
1563
1564module_init (usb_stv680_init);
1565module_exit (usb_stv680_exit);