Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Video4Linux Colour QuickCam driver | |
3 | * Copyright 1997-2000 Philip Blundell <philb@gnu.org> | |
4 | * | |
5 | * Module parameters: | |
6 | * | |
7 | * parport=auto -- probe all parports (default) | |
8 | * parport=0 -- parport0 becomes qcam1 | |
9 | * parport=2,0,1 -- parports 2,0,1 are tried in that order | |
10 | * | |
11 | * probe=0 -- do no probing, assume camera is present | |
12 | * probe=1 -- use IEEE-1284 autoprobe data only (default) | |
13 | * probe=2 -- probe aggressively for cameras | |
14 | * | |
15 | * force_rgb=1 -- force data format to RGB (default is BGR) | |
16 | * | |
17 | * The parport parameter controls which parports will be scanned. | |
18 | * Scanning all parports causes some printers to print a garbage page. | |
19 | * -- March 14, 1999 Billy Donahue <billy@escape.com> | |
20 | * | |
21 | * Fixed data format to BGR, added force_rgb parameter. Added missing | |
22 | * parport_unregister_driver() on module removal. | |
23 | * -- May 28, 2000 Claudio Matsuoka <claudio@conectiva.com> | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/errno.h> | |
29 | #include <linux/fs.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
34 | #include <linux/parport.h> | |
35 | #include <linux/sched.h> | |
36 | #include <linux/videodev.h> | |
37 | #include <asm/semaphore.h> | |
38 | #include <asm/uaccess.h> | |
39 | ||
40 | struct qcam_device { | |
41 | struct video_device vdev; | |
42 | struct pardevice *pdev; | |
43 | struct parport *pport; | |
44 | int width, height; | |
45 | int ccd_width, ccd_height; | |
46 | int mode; | |
47 | int contrast, brightness, whitebal; | |
48 | int top, left; | |
49 | unsigned int bidirectional; | |
50 | struct semaphore lock; | |
51 | }; | |
52 | ||
53 | /* cameras maximum */ | |
54 | #define MAX_CAMS 4 | |
55 | ||
56 | /* The three possible QuickCam modes */ | |
57 | #define QC_MILLIONS 0x18 | |
58 | #define QC_BILLIONS 0x10 | |
59 | #define QC_THOUSANDS 0x08 /* with VIDEC compression (not supported) */ | |
60 | ||
61 | /* The three possible decimations */ | |
62 | #define QC_DECIMATION_1 0 | |
63 | #define QC_DECIMATION_2 2 | |
64 | #define QC_DECIMATION_4 4 | |
65 | ||
66 | #define BANNER "Colour QuickCam for Video4Linux v0.05" | |
67 | ||
68 | static int parport[MAX_CAMS] = { [1 ... MAX_CAMS-1] = -1 }; | |
69 | static int probe = 2; | |
70 | static int force_rgb = 0; | |
71 | static int video_nr = -1; | |
72 | ||
73 | static inline void qcam_set_ack(struct qcam_device *qcam, unsigned int i) | |
74 | { | |
75 | /* note: the QC specs refer to the PCAck pin by voltage, not | |
76 | software level. PC ports have builtin inverters. */ | |
77 | parport_frob_control(qcam->pport, 8, i?8:0); | |
78 | } | |
79 | ||
80 | static inline unsigned int qcam_ready1(struct qcam_device *qcam) | |
81 | { | |
82 | return (parport_read_status(qcam->pport) & 0x8)?1:0; | |
83 | } | |
84 | ||
85 | static inline unsigned int qcam_ready2(struct qcam_device *qcam) | |
86 | { | |
87 | return (parport_read_data(qcam->pport) & 0x1)?1:0; | |
88 | } | |
89 | ||
90 | static unsigned int qcam_await_ready1(struct qcam_device *qcam, | |
91 | int value) | |
92 | { | |
93 | unsigned long oldjiffies = jiffies; | |
94 | unsigned int i; | |
95 | ||
96 | for (oldjiffies = jiffies; (jiffies - oldjiffies) < (HZ/25); ) | |
97 | if (qcam_ready1(qcam) == value) | |
98 | return 0; | |
99 | ||
100 | /* If the camera didn't respond within 1/25 second, poll slowly | |
101 | for a while. */ | |
102 | for (i = 0; i < 50; i++) | |
103 | { | |
104 | if (qcam_ready1(qcam) == value) | |
105 | return 0; | |
106 | msleep_interruptible(100); | |
107 | } | |
108 | ||
109 | /* Probably somebody pulled the plug out. Not much we can do. */ | |
110 | printk(KERN_ERR "c-qcam: ready1 timeout (%d) %x %x\n", value, | |
111 | parport_read_status(qcam->pport), | |
112 | parport_read_control(qcam->pport)); | |
113 | return 1; | |
114 | } | |
115 | ||
116 | static unsigned int qcam_await_ready2(struct qcam_device *qcam, int value) | |
117 | { | |
118 | unsigned long oldjiffies = jiffies; | |
119 | unsigned int i; | |
120 | ||
121 | for (oldjiffies = jiffies; (jiffies - oldjiffies) < (HZ/25); ) | |
122 | if (qcam_ready2(qcam) == value) | |
123 | return 0; | |
124 | ||
125 | /* If the camera didn't respond within 1/25 second, poll slowly | |
126 | for a while. */ | |
127 | for (i = 0; i < 50; i++) | |
128 | { | |
129 | if (qcam_ready2(qcam) == value) | |
130 | return 0; | |
131 | msleep_interruptible(100); | |
132 | } | |
133 | ||
134 | /* Probably somebody pulled the plug out. Not much we can do. */ | |
135 | printk(KERN_ERR "c-qcam: ready2 timeout (%d) %x %x %x\n", value, | |
136 | parport_read_status(qcam->pport), | |
137 | parport_read_control(qcam->pport), | |
138 | parport_read_data(qcam->pport)); | |
139 | return 1; | |
140 | } | |
141 | ||
142 | static int qcam_read_data(struct qcam_device *qcam) | |
143 | { | |
144 | unsigned int idata; | |
145 | qcam_set_ack(qcam, 0); | |
146 | if (qcam_await_ready1(qcam, 1)) return -1; | |
147 | idata = parport_read_status(qcam->pport) & 0xf0; | |
148 | qcam_set_ack(qcam, 1); | |
149 | if (qcam_await_ready1(qcam, 0)) return -1; | |
150 | idata |= (parport_read_status(qcam->pport) >> 4); | |
151 | return idata; | |
152 | } | |
153 | ||
154 | static int qcam_write_data(struct qcam_device *qcam, unsigned int data) | |
155 | { | |
156 | unsigned int idata; | |
157 | parport_write_data(qcam->pport, data); | |
158 | idata = qcam_read_data(qcam); | |
159 | if (data != idata) | |
160 | { | |
161 | printk(KERN_WARNING "cqcam: sent %x but received %x\n", data, | |
162 | idata); | |
163 | return 1; | |
164 | } | |
165 | return 0; | |
166 | } | |
167 | ||
168 | static inline int qcam_set(struct qcam_device *qcam, unsigned int cmd, unsigned int data) | |
169 | { | |
170 | if (qcam_write_data(qcam, cmd)) | |
171 | return -1; | |
172 | if (qcam_write_data(qcam, data)) | |
173 | return -1; | |
174 | return 0; | |
175 | } | |
176 | ||
177 | static inline int qcam_get(struct qcam_device *qcam, unsigned int cmd) | |
178 | { | |
179 | if (qcam_write_data(qcam, cmd)) | |
180 | return -1; | |
181 | return qcam_read_data(qcam); | |
182 | } | |
183 | ||
184 | static int qc_detect(struct qcam_device *qcam) | |
185 | { | |
186 | unsigned int stat, ostat, i, count = 0; | |
187 | ||
188 | /* The probe routine below is not very reliable. The IEEE-1284 | |
189 | probe takes precedence. */ | |
190 | /* XXX Currently parport provides no way to distinguish between | |
191 | "the IEEE probe was not done" and "the probe was done, but | |
192 | no device was found". Fix this one day. */ | |
193 | if (qcam->pport->probe_info[0].class == PARPORT_CLASS_MEDIA | |
194 | && qcam->pport->probe_info[0].model | |
195 | && !strcmp(qcam->pdev->port->probe_info[0].model, | |
196 | "Color QuickCam 2.0")) { | |
197 | printk(KERN_DEBUG "QuickCam: Found by IEEE1284 probe.\n"); | |
198 | return 1; | |
199 | } | |
200 | ||
201 | if (probe < 2) | |
202 | return 0; | |
203 | ||
204 | parport_write_control(qcam->pport, 0xc); | |
205 | ||
206 | /* look for a heartbeat */ | |
207 | ostat = stat = parport_read_status(qcam->pport); | |
208 | for (i=0; i<250; i++) | |
209 | { | |
210 | mdelay(1); | |
211 | stat = parport_read_status(qcam->pport); | |
212 | if (ostat != stat) | |
213 | { | |
214 | if (++count >= 3) return 1; | |
215 | ostat = stat; | |
216 | } | |
217 | } | |
218 | ||
219 | /* Reset the camera and try again */ | |
220 | parport_write_control(qcam->pport, 0xc); | |
221 | parport_write_control(qcam->pport, 0x8); | |
222 | mdelay(1); | |
223 | parport_write_control(qcam->pport, 0xc); | |
224 | mdelay(1); | |
225 | count = 0; | |
226 | ||
227 | ostat = stat = parport_read_status(qcam->pport); | |
228 | for (i=0; i<250; i++) | |
229 | { | |
230 | mdelay(1); | |
231 | stat = parport_read_status(qcam->pport); | |
232 | if (ostat != stat) | |
233 | { | |
234 | if (++count >= 3) return 1; | |
235 | ostat = stat; | |
236 | } | |
237 | } | |
238 | ||
239 | /* no (or flatline) camera, give up */ | |
240 | return 0; | |
241 | } | |
242 | ||
243 | static void qc_reset(struct qcam_device *qcam) | |
244 | { | |
245 | parport_write_control(qcam->pport, 0xc); | |
246 | parport_write_control(qcam->pport, 0x8); | |
247 | mdelay(1); | |
248 | parport_write_control(qcam->pport, 0xc); | |
249 | mdelay(1); | |
250 | } | |
251 | ||
252 | /* Reset the QuickCam and program for brightness, contrast, | |
253 | * white-balance, and resolution. */ | |
254 | ||
255 | static void qc_setup(struct qcam_device *q) | |
256 | { | |
257 | qc_reset(q); | |
258 | ||
259 | /* Set the brightness. */ | |
260 | qcam_set(q, 11, q->brightness); | |
261 | ||
262 | /* Set the height and width. These refer to the actual | |
263 | CCD area *before* applying the selected decimation. */ | |
264 | qcam_set(q, 17, q->ccd_height); | |
265 | qcam_set(q, 19, q->ccd_width / 2); | |
266 | ||
267 | /* Set top and left. */ | |
268 | qcam_set(q, 0xd, q->top); | |
269 | qcam_set(q, 0xf, q->left); | |
270 | ||
271 | /* Set contrast and white balance. */ | |
272 | qcam_set(q, 0x19, q->contrast); | |
273 | qcam_set(q, 0x1f, q->whitebal); | |
274 | ||
275 | /* Set the speed. */ | |
276 | qcam_set(q, 45, 2); | |
277 | } | |
278 | ||
279 | /* Read some bytes from the camera and put them in the buffer. | |
280 | nbytes should be a multiple of 3, because bidirectional mode gives | |
281 | us three bytes at a time. */ | |
282 | ||
283 | static unsigned int qcam_read_bytes(struct qcam_device *q, unsigned char *buf, unsigned int nbytes) | |
284 | { | |
285 | unsigned int bytes = 0; | |
286 | ||
287 | qcam_set_ack(q, 0); | |
288 | if (q->bidirectional) | |
289 | { | |
290 | /* It's a bidirectional port */ | |
291 | while (bytes < nbytes) | |
292 | { | |
293 | unsigned int lo1, hi1, lo2, hi2; | |
294 | unsigned char r, g, b; | |
295 | ||
296 | if (qcam_await_ready2(q, 1)) return bytes; | |
297 | lo1 = parport_read_data(q->pport) >> 1; | |
298 | hi1 = ((parport_read_status(q->pport) >> 3) & 0x1f) ^ 0x10; | |
299 | qcam_set_ack(q, 1); | |
300 | if (qcam_await_ready2(q, 0)) return bytes; | |
301 | lo2 = parport_read_data(q->pport) >> 1; | |
302 | hi2 = ((parport_read_status(q->pport) >> 3) & 0x1f) ^ 0x10; | |
303 | qcam_set_ack(q, 0); | |
304 | r = (lo1 | ((hi1 & 1)<<7)); | |
305 | g = ((hi1 & 0x1e)<<3) | ((hi2 & 0x1e)>>1); | |
306 | b = (lo2 | ((hi2 & 1)<<7)); | |
307 | if (force_rgb) { | |
308 | buf[bytes++] = r; | |
309 | buf[bytes++] = g; | |
310 | buf[bytes++] = b; | |
311 | } else { | |
312 | buf[bytes++] = b; | |
313 | buf[bytes++] = g; | |
314 | buf[bytes++] = r; | |
315 | } | |
316 | } | |
317 | } | |
318 | else | |
319 | { | |
320 | /* It's a unidirectional port */ | |
321 | int i = 0, n = bytes; | |
322 | unsigned char rgb[3]; | |
323 | ||
324 | while (bytes < nbytes) | |
325 | { | |
326 | unsigned int hi, lo; | |
327 | ||
328 | if (qcam_await_ready1(q, 1)) return bytes; | |
329 | hi = (parport_read_status(q->pport) & 0xf0); | |
330 | qcam_set_ack(q, 1); | |
331 | if (qcam_await_ready1(q, 0)) return bytes; | |
332 | lo = (parport_read_status(q->pport) & 0xf0); | |
333 | qcam_set_ack(q, 0); | |
334 | /* flip some bits */ | |
335 | rgb[(i = bytes++ % 3)] = (hi | (lo >> 4)) ^ 0x88; | |
336 | if (i >= 2) { | |
337 | get_fragment: | |
338 | if (force_rgb) { | |
339 | buf[n++] = rgb[0]; | |
340 | buf[n++] = rgb[1]; | |
341 | buf[n++] = rgb[2]; | |
342 | } else { | |
343 | buf[n++] = rgb[2]; | |
344 | buf[n++] = rgb[1]; | |
345 | buf[n++] = rgb[0]; | |
346 | } | |
347 | } | |
348 | } | |
349 | if (i) { | |
350 | i = 0; | |
351 | goto get_fragment; | |
352 | } | |
353 | } | |
354 | return bytes; | |
355 | } | |
356 | ||
357 | #define BUFSZ 150 | |
358 | ||
359 | static long qc_capture(struct qcam_device *q, char __user *buf, unsigned long len) | |
360 | { | |
361 | unsigned lines, pixelsperline, bitsperxfer; | |
362 | unsigned int is_bi_dir = q->bidirectional; | |
363 | size_t wantlen, outptr = 0; | |
364 | char tmpbuf[BUFSZ]; | |
365 | ||
366 | if (!access_ok(VERIFY_WRITE, buf, len)) | |
367 | return -EFAULT; | |
368 | ||
369 | /* Wait for camera to become ready */ | |
370 | for (;;) | |
371 | { | |
372 | int i = qcam_get(q, 41); | |
373 | if (i == -1) { | |
374 | qc_setup(q); | |
375 | return -EIO; | |
376 | } | |
377 | if ((i & 0x80) == 0) | |
378 | break; | |
379 | else | |
380 | schedule(); | |
381 | } | |
382 | ||
383 | if (qcam_set(q, 7, (q->mode | (is_bi_dir?1:0)) + 1)) | |
384 | return -EIO; | |
385 | ||
386 | lines = q->height; | |
387 | pixelsperline = q->width; | |
388 | bitsperxfer = (is_bi_dir) ? 24 : 8; | |
389 | ||
390 | if (is_bi_dir) | |
391 | { | |
392 | /* Turn the port around */ | |
393 | parport_data_reverse(q->pport); | |
394 | mdelay(3); | |
395 | qcam_set_ack(q, 0); | |
396 | if (qcam_await_ready1(q, 1)) { | |
397 | qc_setup(q); | |
398 | return -EIO; | |
399 | } | |
400 | qcam_set_ack(q, 1); | |
401 | if (qcam_await_ready1(q, 0)) { | |
402 | qc_setup(q); | |
403 | return -EIO; | |
404 | } | |
405 | } | |
406 | ||
407 | wantlen = lines * pixelsperline * 24 / 8; | |
408 | ||
409 | while (wantlen) | |
410 | { | |
411 | size_t t, s; | |
412 | s = (wantlen > BUFSZ)?BUFSZ:wantlen; | |
413 | t = qcam_read_bytes(q, tmpbuf, s); | |
414 | if (outptr < len) | |
415 | { | |
416 | size_t sz = len - outptr; | |
417 | if (sz > t) sz = t; | |
418 | if (__copy_to_user(buf+outptr, tmpbuf, sz)) | |
419 | break; | |
420 | outptr += sz; | |
421 | } | |
422 | wantlen -= t; | |
423 | if (t < s) | |
424 | break; | |
425 | cond_resched(); | |
426 | } | |
427 | ||
428 | len = outptr; | |
429 | ||
430 | if (wantlen) | |
431 | { | |
432 | printk("qcam: short read.\n"); | |
433 | if (is_bi_dir) | |
434 | parport_data_forward(q->pport); | |
435 | qc_setup(q); | |
436 | return len; | |
437 | } | |
438 | ||
439 | if (is_bi_dir) | |
440 | { | |
441 | int l; | |
442 | do { | |
443 | l = qcam_read_bytes(q, tmpbuf, 3); | |
444 | cond_resched(); | |
445 | } while (l && (tmpbuf[0] == 0x7e || tmpbuf[1] == 0x7e || tmpbuf[2] == 0x7e)); | |
446 | if (force_rgb) { | |
447 | if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf) | |
448 | printk("qcam: bad EOF\n"); | |
449 | } else { | |
450 | if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe) | |
451 | printk("qcam: bad EOF\n"); | |
452 | } | |
453 | qcam_set_ack(q, 0); | |
454 | if (qcam_await_ready1(q, 1)) | |
455 | { | |
456 | printk("qcam: no ack after EOF\n"); | |
457 | parport_data_forward(q->pport); | |
458 | qc_setup(q); | |
459 | return len; | |
460 | } | |
461 | parport_data_forward(q->pport); | |
462 | mdelay(3); | |
463 | qcam_set_ack(q, 1); | |
464 | if (qcam_await_ready1(q, 0)) | |
465 | { | |
466 | printk("qcam: no ack to port turnaround\n"); | |
467 | qc_setup(q); | |
468 | return len; | |
469 | } | |
470 | } | |
471 | else | |
472 | { | |
473 | int l; | |
474 | do { | |
475 | l = qcam_read_bytes(q, tmpbuf, 1); | |
476 | cond_resched(); | |
477 | } while (l && tmpbuf[0] == 0x7e); | |
478 | l = qcam_read_bytes(q, tmpbuf+1, 2); | |
479 | if (force_rgb) { | |
480 | if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf) | |
481 | printk("qcam: bad EOF\n"); | |
482 | } else { | |
483 | if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe) | |
484 | printk("qcam: bad EOF\n"); | |
485 | } | |
486 | } | |
487 | ||
488 | qcam_write_data(q, 0); | |
489 | return len; | |
490 | } | |
491 | ||
492 | /* | |
493 | * Video4linux interfacing | |
494 | */ | |
495 | ||
496 | static int qcam_do_ioctl(struct inode *inode, struct file *file, | |
497 | unsigned int cmd, void *arg) | |
498 | { | |
499 | struct video_device *dev = video_devdata(file); | |
500 | struct qcam_device *qcam=(struct qcam_device *)dev; | |
501 | ||
502 | switch(cmd) | |
503 | { | |
504 | case VIDIOCGCAP: | |
505 | { | |
506 | struct video_capability *b = arg; | |
507 | strcpy(b->name, "Quickcam"); | |
508 | b->type = VID_TYPE_CAPTURE|VID_TYPE_SCALES; | |
509 | b->channels = 1; | |
510 | b->audios = 0; | |
511 | b->maxwidth = 320; | |
512 | b->maxheight = 240; | |
513 | b->minwidth = 80; | |
514 | b->minheight = 60; | |
515 | return 0; | |
516 | } | |
517 | case VIDIOCGCHAN: | |
518 | { | |
519 | struct video_channel *v = arg; | |
520 | if(v->channel!=0) | |
521 | return -EINVAL; | |
522 | v->flags=0; | |
523 | v->tuners=0; | |
524 | /* Good question.. its composite or SVHS so.. */ | |
525 | v->type = VIDEO_TYPE_CAMERA; | |
526 | strcpy(v->name, "Camera"); | |
527 | return 0; | |
528 | } | |
529 | case VIDIOCSCHAN: | |
530 | { | |
531 | struct video_channel *v = arg; | |
532 | if(v->channel!=0) | |
533 | return -EINVAL; | |
534 | return 0; | |
535 | } | |
536 | case VIDIOCGTUNER: | |
537 | { | |
538 | struct video_tuner *v = arg; | |
539 | if(v->tuner) | |
540 | return -EINVAL; | |
541 | memset(v,0,sizeof(*v)); | |
542 | strcpy(v->name, "Format"); | |
543 | v->mode = VIDEO_MODE_AUTO; | |
544 | return 0; | |
545 | } | |
546 | case VIDIOCSTUNER: | |
547 | { | |
548 | struct video_tuner *v = arg; | |
549 | if(v->tuner) | |
550 | return -EINVAL; | |
551 | if(v->mode!=VIDEO_MODE_AUTO) | |
552 | return -EINVAL; | |
553 | return 0; | |
554 | } | |
555 | case VIDIOCGPICT: | |
556 | { | |
557 | struct video_picture *p = arg; | |
558 | p->colour=0x8000; | |
559 | p->hue=0x8000; | |
560 | p->brightness=qcam->brightness<<8; | |
561 | p->contrast=qcam->contrast<<8; | |
562 | p->whiteness=qcam->whitebal<<8; | |
563 | p->depth=24; | |
564 | p->palette=VIDEO_PALETTE_RGB24; | |
565 | return 0; | |
566 | } | |
567 | case VIDIOCSPICT: | |
568 | { | |
569 | struct video_picture *p = arg; | |
570 | ||
571 | /* | |
572 | * Sanity check args | |
573 | */ | |
574 | if (p->depth != 24 || p->palette != VIDEO_PALETTE_RGB24) | |
575 | return -EINVAL; | |
576 | ||
577 | /* | |
578 | * Now load the camera. | |
579 | */ | |
580 | qcam->brightness = p->brightness>>8; | |
581 | qcam->contrast = p->contrast>>8; | |
582 | qcam->whitebal = p->whiteness>>8; | |
583 | ||
584 | down(&qcam->lock); | |
585 | parport_claim_or_block(qcam->pdev); | |
586 | qc_setup(qcam); | |
587 | parport_release(qcam->pdev); | |
588 | up(&qcam->lock); | |
589 | return 0; | |
590 | } | |
591 | case VIDIOCSWIN: | |
592 | { | |
593 | struct video_window *vw = arg; | |
594 | ||
595 | if(vw->flags) | |
596 | return -EINVAL; | |
597 | if(vw->clipcount) | |
598 | return -EINVAL; | |
599 | if(vw->height<60||vw->height>240) | |
600 | return -EINVAL; | |
601 | if(vw->width<80||vw->width>320) | |
602 | return -EINVAL; | |
603 | ||
604 | qcam->width = 80; | |
605 | qcam->height = 60; | |
606 | qcam->mode = QC_DECIMATION_4; | |
607 | ||
608 | if(vw->width>=160 && vw->height>=120) | |
609 | { | |
610 | qcam->width = 160; | |
611 | qcam->height = 120; | |
612 | qcam->mode = QC_DECIMATION_2; | |
613 | } | |
614 | if(vw->width>=320 && vw->height>=240) | |
615 | { | |
616 | qcam->width = 320; | |
617 | qcam->height = 240; | |
618 | qcam->mode = QC_DECIMATION_1; | |
619 | } | |
620 | qcam->mode |= QC_MILLIONS; | |
621 | #if 0 | |
622 | if(vw->width>=640 && vw->height>=480) | |
623 | { | |
624 | qcam->width = 640; | |
625 | qcam->height = 480; | |
626 | qcam->mode = QC_BILLIONS | QC_DECIMATION_1; | |
627 | } | |
628 | #endif | |
629 | /* Ok we figured out what to use from our | |
630 | wide choice */ | |
631 | down(&qcam->lock); | |
632 | parport_claim_or_block(qcam->pdev); | |
633 | qc_setup(qcam); | |
634 | parport_release(qcam->pdev); | |
635 | up(&qcam->lock); | |
636 | return 0; | |
637 | } | |
638 | case VIDIOCGWIN: | |
639 | { | |
640 | struct video_window *vw = arg; | |
641 | memset(vw, 0, sizeof(*vw)); | |
642 | vw->width=qcam->width; | |
643 | vw->height=qcam->height; | |
644 | return 0; | |
645 | } | |
646 | case VIDIOCKEY: | |
647 | return 0; | |
648 | case VIDIOCCAPTURE: | |
649 | case VIDIOCGFBUF: | |
650 | case VIDIOCSFBUF: | |
651 | case VIDIOCGFREQ: | |
652 | case VIDIOCSFREQ: | |
653 | case VIDIOCGAUDIO: | |
654 | case VIDIOCSAUDIO: | |
655 | return -EINVAL; | |
656 | default: | |
657 | return -ENOIOCTLCMD; | |
658 | } | |
659 | return 0; | |
660 | } | |
661 | ||
662 | static int qcam_ioctl(struct inode *inode, struct file *file, | |
663 | unsigned int cmd, unsigned long arg) | |
664 | { | |
665 | return video_usercopy(inode, file, cmd, arg, qcam_do_ioctl); | |
666 | } | |
667 | ||
668 | static ssize_t qcam_read(struct file *file, char __user *buf, | |
669 | size_t count, loff_t *ppos) | |
670 | { | |
671 | struct video_device *v = video_devdata(file); | |
672 | struct qcam_device *qcam=(struct qcam_device *)v; | |
673 | int len; | |
674 | ||
675 | down(&qcam->lock); | |
676 | parport_claim_or_block(qcam->pdev); | |
677 | /* Probably should have a semaphore against multiple users */ | |
678 | len = qc_capture(qcam, buf,count); | |
679 | parport_release(qcam->pdev); | |
680 | up(&qcam->lock); | |
681 | return len; | |
682 | } | |
683 | ||
684 | /* video device template */ | |
685 | static struct file_operations qcam_fops = { | |
686 | .owner = THIS_MODULE, | |
687 | .open = video_exclusive_open, | |
688 | .release = video_exclusive_release, | |
689 | .ioctl = qcam_ioctl, | |
690 | .read = qcam_read, | |
691 | .llseek = no_llseek, | |
692 | }; | |
693 | ||
694 | static struct video_device qcam_template= | |
695 | { | |
696 | .owner = THIS_MODULE, | |
697 | .name = "Colour QuickCam", | |
698 | .type = VID_TYPE_CAPTURE, | |
699 | .hardware = VID_HARDWARE_QCAM_C, | |
700 | .fops = &qcam_fops, | |
701 | }; | |
702 | ||
703 | /* Initialize the QuickCam driver control structure. */ | |
704 | ||
705 | static struct qcam_device *qcam_init(struct parport *port) | |
706 | { | |
707 | struct qcam_device *q; | |
708 | ||
709 | q = kmalloc(sizeof(struct qcam_device), GFP_KERNEL); | |
710 | if(q==NULL) | |
711 | return NULL; | |
712 | ||
713 | q->pport = port; | |
714 | q->pdev = parport_register_device(port, "c-qcam", NULL, NULL, | |
715 | NULL, 0, NULL); | |
716 | ||
717 | q->bidirectional = (q->pport->modes & PARPORT_MODE_TRISTATE)?1:0; | |
718 | ||
719 | if (q->pdev == NULL) | |
720 | { | |
721 | printk(KERN_ERR "c-qcam: couldn't register for %s.\n", | |
722 | port->name); | |
723 | kfree(q); | |
724 | return NULL; | |
725 | } | |
726 | ||
727 | memcpy(&q->vdev, &qcam_template, sizeof(qcam_template)); | |
728 | ||
729 | init_MUTEX(&q->lock); | |
730 | q->width = q->ccd_width = 320; | |
731 | q->height = q->ccd_height = 240; | |
732 | q->mode = QC_MILLIONS | QC_DECIMATION_1; | |
733 | q->contrast = 192; | |
734 | q->brightness = 240; | |
735 | q->whitebal = 128; | |
736 | q->top = 1; | |
737 | q->left = 14; | |
738 | return q; | |
739 | } | |
740 | ||
741 | static struct qcam_device *qcams[MAX_CAMS]; | |
742 | static unsigned int num_cams = 0; | |
743 | ||
744 | static int init_cqcam(struct parport *port) | |
745 | { | |
746 | struct qcam_device *qcam; | |
747 | ||
748 | if (parport[0] != -1) | |
749 | { | |
750 | /* The user gave specific instructions */ | |
751 | int i, found = 0; | |
752 | for (i = 0; i < MAX_CAMS && parport[i] != -1; i++) | |
753 | { | |
754 | if (parport[0] == port->number) | |
755 | found = 1; | |
756 | } | |
757 | if (!found) | |
758 | return -ENODEV; | |
759 | } | |
760 | ||
761 | if (num_cams == MAX_CAMS) | |
762 | return -ENOSPC; | |
763 | ||
764 | qcam = qcam_init(port); | |
765 | if (qcam==NULL) | |
766 | return -ENODEV; | |
767 | ||
768 | parport_claim_or_block(qcam->pdev); | |
769 | ||
770 | qc_reset(qcam); | |
771 | ||
772 | if (probe && qc_detect(qcam)==0) | |
773 | { | |
774 | parport_release(qcam->pdev); | |
775 | parport_unregister_device(qcam->pdev); | |
776 | kfree(qcam); | |
777 | return -ENODEV; | |
778 | } | |
779 | ||
780 | qc_setup(qcam); | |
781 | ||
782 | parport_release(qcam->pdev); | |
783 | ||
784 | if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr)==-1) | |
785 | { | |
786 | printk(KERN_ERR "Unable to register Colour QuickCam on %s\n", | |
787 | qcam->pport->name); | |
788 | parport_unregister_device(qcam->pdev); | |
789 | kfree(qcam); | |
790 | return -ENODEV; | |
791 | } | |
792 | ||
793 | printk(KERN_INFO "video%d: Colour QuickCam found on %s\n", | |
794 | qcam->vdev.minor, qcam->pport->name); | |
795 | ||
796 | qcams[num_cams++] = qcam; | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
801 | static void close_cqcam(struct qcam_device *qcam) | |
802 | { | |
803 | video_unregister_device(&qcam->vdev); | |
804 | parport_unregister_device(qcam->pdev); | |
805 | kfree(qcam); | |
806 | } | |
807 | ||
808 | static void cq_attach(struct parport *port) | |
809 | { | |
810 | init_cqcam(port); | |
811 | } | |
812 | ||
813 | static void cq_detach(struct parport *port) | |
814 | { | |
815 | /* Write this some day. */ | |
816 | } | |
817 | ||
818 | static struct parport_driver cqcam_driver = { | |
819 | .name = "cqcam", | |
820 | .attach = cq_attach, | |
821 | .detach = cq_detach, | |
822 | }; | |
823 | ||
824 | static int __init cqcam_init (void) | |
825 | { | |
826 | printk(BANNER "\n"); | |
827 | ||
828 | return parport_register_driver(&cqcam_driver); | |
829 | } | |
830 | ||
831 | static void __exit cqcam_cleanup (void) | |
832 | { | |
833 | unsigned int i; | |
834 | ||
835 | for (i = 0; i < num_cams; i++) | |
836 | close_cqcam(qcams[i]); | |
837 | ||
838 | parport_unregister_driver(&cqcam_driver); | |
839 | } | |
840 | ||
841 | MODULE_AUTHOR("Philip Blundell <philb@gnu.org>"); | |
842 | MODULE_DESCRIPTION(BANNER); | |
843 | MODULE_LICENSE("GPL"); | |
844 | ||
845 | /* FIXME: parport=auto would never have worked, surely? --RR */ | |
846 | MODULE_PARM_DESC(parport ,"parport=<auto|n[,n]...> for port detection method\n\ | |
847 | probe=<0|1|2> for camera detection method\n\ | |
848 | force_rgb=<0|1> for RGB data format (default BGR)"); | |
849 | module_param_array(parport, int, NULL, 0); | |
850 | module_param(probe, int, 0); | |
851 | module_param(force_rgb, bool, 0); | |
852 | module_param(video_nr, int, 0); | |
853 | ||
854 | module_init(cqcam_init); | |
855 | module_exit(cqcam_cleanup); |