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. | |
d56410e0 | 19 | * -- March 14, 1999 Billy Donahue <billy@escape.com> |
1da177e4 LT |
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> | |
3593cab5 IM |
37 | #include <linux/mutex.h> |
38 | ||
1da177e4 LT |
39 | #include <asm/uaccess.h> |
40 | ||
41 | struct qcam_device { | |
42 | struct video_device vdev; | |
43 | struct pardevice *pdev; | |
44 | struct parport *pport; | |
45 | int width, height; | |
46 | int ccd_width, ccd_height; | |
47 | int mode; | |
48 | int contrast, brightness, whitebal; | |
49 | int top, left; | |
50 | unsigned int bidirectional; | |
3593cab5 | 51 | struct mutex lock; |
1da177e4 LT |
52 | }; |
53 | ||
54 | /* cameras maximum */ | |
55 | #define MAX_CAMS 4 | |
56 | ||
57 | /* The three possible QuickCam modes */ | |
58 | #define QC_MILLIONS 0x18 | |
59 | #define QC_BILLIONS 0x10 | |
60 | #define QC_THOUSANDS 0x08 /* with VIDEC compression (not supported) */ | |
61 | ||
62 | /* The three possible decimations */ | |
63 | #define QC_DECIMATION_1 0 | |
64 | #define QC_DECIMATION_2 2 | |
65 | #define QC_DECIMATION_4 4 | |
66 | ||
67 | #define BANNER "Colour QuickCam for Video4Linux v0.05" | |
68 | ||
69 | static int parport[MAX_CAMS] = { [1 ... MAX_CAMS-1] = -1 }; | |
70 | static int probe = 2; | |
71 | static int force_rgb = 0; | |
72 | static int video_nr = -1; | |
73 | ||
74 | static inline void qcam_set_ack(struct qcam_device *qcam, unsigned int i) | |
75 | { | |
76 | /* note: the QC specs refer to the PCAck pin by voltage, not | |
77 | software level. PC ports have builtin inverters. */ | |
78 | parport_frob_control(qcam->pport, 8, i?8:0); | |
79 | } | |
80 | ||
81 | static inline unsigned int qcam_ready1(struct qcam_device *qcam) | |
82 | { | |
83 | return (parport_read_status(qcam->pport) & 0x8)?1:0; | |
84 | } | |
85 | ||
86 | static inline unsigned int qcam_ready2(struct qcam_device *qcam) | |
87 | { | |
88 | return (parport_read_data(qcam->pport) & 0x1)?1:0; | |
89 | } | |
90 | ||
d56410e0 | 91 | static unsigned int qcam_await_ready1(struct qcam_device *qcam, |
1da177e4 LT |
92 | int value) |
93 | { | |
94 | unsigned long oldjiffies = jiffies; | |
95 | unsigned int i; | |
96 | ||
97 | for (oldjiffies = jiffies; (jiffies - oldjiffies) < (HZ/25); ) | |
98 | if (qcam_ready1(qcam) == value) | |
99 | return 0; | |
100 | ||
d56410e0 | 101 | /* If the camera didn't respond within 1/25 second, poll slowly |
1da177e4 LT |
102 | for a while. */ |
103 | for (i = 0; i < 50; i++) | |
104 | { | |
105 | if (qcam_ready1(qcam) == value) | |
106 | return 0; | |
107 | msleep_interruptible(100); | |
108 | } | |
109 | ||
110 | /* Probably somebody pulled the plug out. Not much we can do. */ | |
111 | printk(KERN_ERR "c-qcam: ready1 timeout (%d) %x %x\n", value, | |
112 | parport_read_status(qcam->pport), | |
113 | parport_read_control(qcam->pport)); | |
114 | return 1; | |
115 | } | |
116 | ||
117 | static unsigned int qcam_await_ready2(struct qcam_device *qcam, int value) | |
118 | { | |
119 | unsigned long oldjiffies = jiffies; | |
120 | unsigned int i; | |
121 | ||
122 | for (oldjiffies = jiffies; (jiffies - oldjiffies) < (HZ/25); ) | |
123 | if (qcam_ready2(qcam) == value) | |
124 | return 0; | |
125 | ||
d56410e0 | 126 | /* If the camera didn't respond within 1/25 second, poll slowly |
1da177e4 LT |
127 | for a while. */ |
128 | for (i = 0; i < 50; i++) | |
129 | { | |
130 | if (qcam_ready2(qcam) == value) | |
131 | return 0; | |
132 | msleep_interruptible(100); | |
133 | } | |
134 | ||
135 | /* Probably somebody pulled the plug out. Not much we can do. */ | |
136 | printk(KERN_ERR "c-qcam: ready2 timeout (%d) %x %x %x\n", value, | |
137 | parport_read_status(qcam->pport), | |
138 | parport_read_control(qcam->pport), | |
139 | parport_read_data(qcam->pport)); | |
140 | return 1; | |
141 | } | |
142 | ||
143 | static int qcam_read_data(struct qcam_device *qcam) | |
144 | { | |
145 | unsigned int idata; | |
146 | qcam_set_ack(qcam, 0); | |
147 | if (qcam_await_ready1(qcam, 1)) return -1; | |
148 | idata = parport_read_status(qcam->pport) & 0xf0; | |
149 | qcam_set_ack(qcam, 1); | |
150 | if (qcam_await_ready1(qcam, 0)) return -1; | |
151 | idata |= (parport_read_status(qcam->pport) >> 4); | |
152 | return idata; | |
153 | } | |
154 | ||
155 | static int qcam_write_data(struct qcam_device *qcam, unsigned int data) | |
156 | { | |
157 | unsigned int idata; | |
158 | parport_write_data(qcam->pport, data); | |
159 | idata = qcam_read_data(qcam); | |
d56410e0 | 160 | if (data != idata) |
1da177e4 | 161 | { |
d56410e0 | 162 | printk(KERN_WARNING "cqcam: sent %x but received %x\n", data, |
1da177e4 LT |
163 | idata); |
164 | return 1; | |
d56410e0 | 165 | } |
1da177e4 LT |
166 | return 0; |
167 | } | |
168 | ||
169 | static inline int qcam_set(struct qcam_device *qcam, unsigned int cmd, unsigned int data) | |
170 | { | |
171 | if (qcam_write_data(qcam, cmd)) | |
172 | return -1; | |
173 | if (qcam_write_data(qcam, data)) | |
174 | return -1; | |
175 | return 0; | |
176 | } | |
177 | ||
178 | static inline int qcam_get(struct qcam_device *qcam, unsigned int cmd) | |
179 | { | |
180 | if (qcam_write_data(qcam, cmd)) | |
181 | return -1; | |
182 | return qcam_read_data(qcam); | |
183 | } | |
184 | ||
185 | static int qc_detect(struct qcam_device *qcam) | |
186 | { | |
187 | unsigned int stat, ostat, i, count = 0; | |
188 | ||
189 | /* The probe routine below is not very reliable. The IEEE-1284 | |
190 | probe takes precedence. */ | |
191 | /* XXX Currently parport provides no way to distinguish between | |
192 | "the IEEE probe was not done" and "the probe was done, but | |
193 | no device was found". Fix this one day. */ | |
194 | if (qcam->pport->probe_info[0].class == PARPORT_CLASS_MEDIA | |
195 | && qcam->pport->probe_info[0].model | |
d56410e0 | 196 | && !strcmp(qcam->pdev->port->probe_info[0].model, |
1da177e4 LT |
197 | "Color QuickCam 2.0")) { |
198 | printk(KERN_DEBUG "QuickCam: Found by IEEE1284 probe.\n"); | |
199 | return 1; | |
200 | } | |
d56410e0 | 201 | |
1da177e4 LT |
202 | if (probe < 2) |
203 | return 0; | |
204 | ||
205 | parport_write_control(qcam->pport, 0xc); | |
206 | ||
207 | /* look for a heartbeat */ | |
208 | ostat = stat = parport_read_status(qcam->pport); | |
d56410e0 | 209 | for (i=0; i<250; i++) |
1da177e4 LT |
210 | { |
211 | mdelay(1); | |
212 | stat = parport_read_status(qcam->pport); | |
d56410e0 | 213 | if (ostat != stat) |
1da177e4 LT |
214 | { |
215 | if (++count >= 3) return 1; | |
216 | ostat = stat; | |
217 | } | |
218 | } | |
219 | ||
220 | /* Reset the camera and try again */ | |
221 | parport_write_control(qcam->pport, 0xc); | |
222 | parport_write_control(qcam->pport, 0x8); | |
223 | mdelay(1); | |
224 | parport_write_control(qcam->pport, 0xc); | |
225 | mdelay(1); | |
226 | count = 0; | |
227 | ||
228 | ostat = stat = parport_read_status(qcam->pport); | |
d56410e0 | 229 | for (i=0; i<250; i++) |
1da177e4 LT |
230 | { |
231 | mdelay(1); | |
232 | stat = parport_read_status(qcam->pport); | |
d56410e0 | 233 | if (ostat != stat) |
1da177e4 LT |
234 | { |
235 | if (++count >= 3) return 1; | |
236 | ostat = stat; | |
237 | } | |
238 | } | |
239 | ||
240 | /* no (or flatline) camera, give up */ | |
241 | return 0; | |
242 | } | |
243 | ||
244 | static void qc_reset(struct qcam_device *qcam) | |
245 | { | |
246 | parport_write_control(qcam->pport, 0xc); | |
247 | parport_write_control(qcam->pport, 0x8); | |
248 | mdelay(1); | |
249 | parport_write_control(qcam->pport, 0xc); | |
d56410e0 | 250 | mdelay(1); |
1da177e4 LT |
251 | } |
252 | ||
253 | /* Reset the QuickCam and program for brightness, contrast, | |
254 | * white-balance, and resolution. */ | |
255 | ||
256 | static void qc_setup(struct qcam_device *q) | |
257 | { | |
258 | qc_reset(q); | |
259 | ||
260 | /* Set the brightness. */ | |
d56410e0 | 261 | qcam_set(q, 11, q->brightness); |
1da177e4 LT |
262 | |
263 | /* Set the height and width. These refer to the actual | |
264 | CCD area *before* applying the selected decimation. */ | |
265 | qcam_set(q, 17, q->ccd_height); | |
266 | qcam_set(q, 19, q->ccd_width / 2); | |
267 | ||
268 | /* Set top and left. */ | |
269 | qcam_set(q, 0xd, q->top); | |
270 | qcam_set(q, 0xf, q->left); | |
271 | ||
272 | /* Set contrast and white balance. */ | |
273 | qcam_set(q, 0x19, q->contrast); | |
274 | qcam_set(q, 0x1f, q->whitebal); | |
d56410e0 | 275 | |
1da177e4 LT |
276 | /* Set the speed. */ |
277 | qcam_set(q, 45, 2); | |
278 | } | |
279 | ||
d56410e0 | 280 | /* Read some bytes from the camera and put them in the buffer. |
1da177e4 LT |
281 | nbytes should be a multiple of 3, because bidirectional mode gives |
282 | us three bytes at a time. */ | |
283 | ||
284 | static unsigned int qcam_read_bytes(struct qcam_device *q, unsigned char *buf, unsigned int nbytes) | |
285 | { | |
286 | unsigned int bytes = 0; | |
287 | ||
288 | qcam_set_ack(q, 0); | |
289 | if (q->bidirectional) | |
290 | { | |
291 | /* It's a bidirectional port */ | |
292 | while (bytes < nbytes) | |
293 | { | |
294 | unsigned int lo1, hi1, lo2, hi2; | |
295 | unsigned char r, g, b; | |
296 | ||
297 | if (qcam_await_ready2(q, 1)) return bytes; | |
298 | lo1 = parport_read_data(q->pport) >> 1; | |
299 | hi1 = ((parport_read_status(q->pport) >> 3) & 0x1f) ^ 0x10; | |
300 | qcam_set_ack(q, 1); | |
301 | if (qcam_await_ready2(q, 0)) return bytes; | |
302 | lo2 = parport_read_data(q->pport) >> 1; | |
303 | hi2 = ((parport_read_status(q->pport) >> 3) & 0x1f) ^ 0x10; | |
304 | qcam_set_ack(q, 0); | |
305 | r = (lo1 | ((hi1 & 1)<<7)); | |
306 | g = ((hi1 & 0x1e)<<3) | ((hi2 & 0x1e)>>1); | |
307 | b = (lo2 | ((hi2 & 1)<<7)); | |
308 | if (force_rgb) { | |
309 | buf[bytes++] = r; | |
310 | buf[bytes++] = g; | |
311 | buf[bytes++] = b; | |
312 | } else { | |
313 | buf[bytes++] = b; | |
314 | buf[bytes++] = g; | |
315 | buf[bytes++] = r; | |
316 | } | |
317 | } | |
318 | } | |
319 | else | |
320 | { | |
321 | /* It's a unidirectional port */ | |
322 | int i = 0, n = bytes; | |
323 | unsigned char rgb[3]; | |
324 | ||
325 | while (bytes < nbytes) | |
326 | { | |
327 | unsigned int hi, lo; | |
328 | ||
329 | if (qcam_await_ready1(q, 1)) return bytes; | |
330 | hi = (parport_read_status(q->pport) & 0xf0); | |
331 | qcam_set_ack(q, 1); | |
332 | if (qcam_await_ready1(q, 0)) return bytes; | |
333 | lo = (parport_read_status(q->pport) & 0xf0); | |
334 | qcam_set_ack(q, 0); | |
335 | /* flip some bits */ | |
336 | rgb[(i = bytes++ % 3)] = (hi | (lo >> 4)) ^ 0x88; | |
337 | if (i >= 2) { | |
338 | get_fragment: | |
339 | if (force_rgb) { | |
340 | buf[n++] = rgb[0]; | |
341 | buf[n++] = rgb[1]; | |
342 | buf[n++] = rgb[2]; | |
343 | } else { | |
344 | buf[n++] = rgb[2]; | |
345 | buf[n++] = rgb[1]; | |
346 | buf[n++] = rgb[0]; | |
347 | } | |
348 | } | |
349 | } | |
350 | if (i) { | |
351 | i = 0; | |
352 | goto get_fragment; | |
353 | } | |
354 | } | |
355 | return bytes; | |
356 | } | |
357 | ||
358 | #define BUFSZ 150 | |
359 | ||
360 | static long qc_capture(struct qcam_device *q, char __user *buf, unsigned long len) | |
361 | { | |
362 | unsigned lines, pixelsperline, bitsperxfer; | |
363 | unsigned int is_bi_dir = q->bidirectional; | |
364 | size_t wantlen, outptr = 0; | |
365 | char tmpbuf[BUFSZ]; | |
366 | ||
367 | if (!access_ok(VERIFY_WRITE, buf, len)) | |
368 | return -EFAULT; | |
369 | ||
370 | /* Wait for camera to become ready */ | |
371 | for (;;) | |
372 | { | |
373 | int i = qcam_get(q, 41); | |
374 | if (i == -1) { | |
375 | qc_setup(q); | |
376 | return -EIO; | |
377 | } | |
378 | if ((i & 0x80) == 0) | |
379 | break; | |
380 | else | |
381 | schedule(); | |
382 | } | |
383 | ||
384 | if (qcam_set(q, 7, (q->mode | (is_bi_dir?1:0)) + 1)) | |
385 | return -EIO; | |
d56410e0 | 386 | |
1da177e4 LT |
387 | lines = q->height; |
388 | pixelsperline = q->width; | |
389 | bitsperxfer = (is_bi_dir) ? 24 : 8; | |
390 | ||
391 | if (is_bi_dir) | |
392 | { | |
393 | /* Turn the port around */ | |
394 | parport_data_reverse(q->pport); | |
395 | mdelay(3); | |
396 | qcam_set_ack(q, 0); | |
397 | if (qcam_await_ready1(q, 1)) { | |
398 | qc_setup(q); | |
399 | return -EIO; | |
400 | } | |
401 | qcam_set_ack(q, 1); | |
402 | if (qcam_await_ready1(q, 0)) { | |
403 | qc_setup(q); | |
404 | return -EIO; | |
405 | } | |
406 | } | |
407 | ||
408 | wantlen = lines * pixelsperline * 24 / 8; | |
409 | ||
410 | while (wantlen) | |
411 | { | |
412 | size_t t, s; | |
413 | s = (wantlen > BUFSZ)?BUFSZ:wantlen; | |
414 | t = qcam_read_bytes(q, tmpbuf, s); | |
415 | if (outptr < len) | |
416 | { | |
417 | size_t sz = len - outptr; | |
418 | if (sz > t) sz = t; | |
419 | if (__copy_to_user(buf+outptr, tmpbuf, sz)) | |
420 | break; | |
421 | outptr += sz; | |
422 | } | |
423 | wantlen -= t; | |
424 | if (t < s) | |
425 | break; | |
426 | cond_resched(); | |
427 | } | |
428 | ||
429 | len = outptr; | |
430 | ||
431 | if (wantlen) | |
432 | { | |
433 | printk("qcam: short read.\n"); | |
434 | if (is_bi_dir) | |
435 | parport_data_forward(q->pport); | |
436 | qc_setup(q); | |
437 | return len; | |
438 | } | |
439 | ||
440 | if (is_bi_dir) | |
441 | { | |
442 | int l; | |
443 | do { | |
444 | l = qcam_read_bytes(q, tmpbuf, 3); | |
445 | cond_resched(); | |
446 | } while (l && (tmpbuf[0] == 0x7e || tmpbuf[1] == 0x7e || tmpbuf[2] == 0x7e)); | |
447 | if (force_rgb) { | |
448 | if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf) | |
449 | printk("qcam: bad EOF\n"); | |
450 | } else { | |
451 | if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe) | |
452 | printk("qcam: bad EOF\n"); | |
453 | } | |
454 | qcam_set_ack(q, 0); | |
455 | if (qcam_await_ready1(q, 1)) | |
456 | { | |
457 | printk("qcam: no ack after EOF\n"); | |
458 | parport_data_forward(q->pport); | |
459 | qc_setup(q); | |
460 | return len; | |
461 | } | |
462 | parport_data_forward(q->pport); | |
463 | mdelay(3); | |
464 | qcam_set_ack(q, 1); | |
465 | if (qcam_await_ready1(q, 0)) | |
466 | { | |
467 | printk("qcam: no ack to port turnaround\n"); | |
468 | qc_setup(q); | |
469 | return len; | |
470 | } | |
471 | } | |
472 | else | |
473 | { | |
474 | int l; | |
475 | do { | |
476 | l = qcam_read_bytes(q, tmpbuf, 1); | |
477 | cond_resched(); | |
478 | } while (l && tmpbuf[0] == 0x7e); | |
479 | l = qcam_read_bytes(q, tmpbuf+1, 2); | |
480 | if (force_rgb) { | |
481 | if (tmpbuf[0] != 0xe || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xf) | |
482 | printk("qcam: bad EOF\n"); | |
483 | } else { | |
484 | if (tmpbuf[0] != 0xf || tmpbuf[1] != 0x0 || tmpbuf[2] != 0xe) | |
485 | printk("qcam: bad EOF\n"); | |
486 | } | |
487 | } | |
488 | ||
489 | qcam_write_data(q, 0); | |
490 | return len; | |
491 | } | |
492 | ||
493 | /* | |
494 | * Video4linux interfacing | |
495 | */ | |
496 | ||
497 | static int qcam_do_ioctl(struct inode *inode, struct file *file, | |
498 | unsigned int cmd, void *arg) | |
499 | { | |
500 | struct video_device *dev = video_devdata(file); | |
501 | struct qcam_device *qcam=(struct qcam_device *)dev; | |
d56410e0 | 502 | |
1da177e4 LT |
503 | switch(cmd) |
504 | { | |
505 | case VIDIOCGCAP: | |
506 | { | |
507 | struct video_capability *b = arg; | |
508 | strcpy(b->name, "Quickcam"); | |
509 | b->type = VID_TYPE_CAPTURE|VID_TYPE_SCALES; | |
510 | b->channels = 1; | |
511 | b->audios = 0; | |
512 | b->maxwidth = 320; | |
513 | b->maxheight = 240; | |
514 | b->minwidth = 80; | |
515 | b->minheight = 60; | |
516 | return 0; | |
517 | } | |
518 | case VIDIOCGCHAN: | |
519 | { | |
520 | struct video_channel *v = arg; | |
521 | if(v->channel!=0) | |
522 | return -EINVAL; | |
523 | v->flags=0; | |
524 | v->tuners=0; | |
525 | /* Good question.. its composite or SVHS so.. */ | |
526 | v->type = VIDEO_TYPE_CAMERA; | |
527 | strcpy(v->name, "Camera"); | |
528 | return 0; | |
529 | } | |
530 | case VIDIOCSCHAN: | |
531 | { | |
532 | struct video_channel *v = arg; | |
533 | if(v->channel!=0) | |
534 | return -EINVAL; | |
535 | return 0; | |
536 | } | |
537 | case VIDIOCGTUNER: | |
538 | { | |
539 | struct video_tuner *v = arg; | |
540 | if(v->tuner) | |
541 | return -EINVAL; | |
542 | memset(v,0,sizeof(*v)); | |
543 | strcpy(v->name, "Format"); | |
544 | v->mode = VIDEO_MODE_AUTO; | |
545 | return 0; | |
546 | } | |
547 | case VIDIOCSTUNER: | |
548 | { | |
549 | struct video_tuner *v = arg; | |
550 | if(v->tuner) | |
551 | return -EINVAL; | |
552 | if(v->mode!=VIDEO_MODE_AUTO) | |
553 | return -EINVAL; | |
554 | return 0; | |
555 | } | |
556 | case VIDIOCGPICT: | |
557 | { | |
558 | struct video_picture *p = arg; | |
559 | p->colour=0x8000; | |
560 | p->hue=0x8000; | |
561 | p->brightness=qcam->brightness<<8; | |
562 | p->contrast=qcam->contrast<<8; | |
563 | p->whiteness=qcam->whitebal<<8; | |
564 | p->depth=24; | |
565 | p->palette=VIDEO_PALETTE_RGB24; | |
566 | return 0; | |
567 | } | |
568 | case VIDIOCSPICT: | |
569 | { | |
570 | struct video_picture *p = arg; | |
571 | ||
572 | /* | |
573 | * Sanity check args | |
574 | */ | |
575 | if (p->depth != 24 || p->palette != VIDEO_PALETTE_RGB24) | |
576 | return -EINVAL; | |
d56410e0 | 577 | |
1da177e4 LT |
578 | /* |
579 | * Now load the camera. | |
580 | */ | |
581 | qcam->brightness = p->brightness>>8; | |
582 | qcam->contrast = p->contrast>>8; | |
583 | qcam->whitebal = p->whiteness>>8; | |
584 | ||
3593cab5 | 585 | mutex_lock(&qcam->lock); |
1da177e4 | 586 | parport_claim_or_block(qcam->pdev); |
d56410e0 | 587 | qc_setup(qcam); |
1da177e4 | 588 | parport_release(qcam->pdev); |
3593cab5 | 589 | mutex_unlock(&qcam->lock); |
1da177e4 LT |
590 | return 0; |
591 | } | |
592 | case VIDIOCSWIN: | |
593 | { | |
594 | struct video_window *vw = arg; | |
595 | ||
596 | if(vw->flags) | |
597 | return -EINVAL; | |
598 | if(vw->clipcount) | |
599 | return -EINVAL; | |
600 | if(vw->height<60||vw->height>240) | |
601 | return -EINVAL; | |
602 | if(vw->width<80||vw->width>320) | |
603 | return -EINVAL; | |
d56410e0 | 604 | |
1da177e4 LT |
605 | qcam->width = 80; |
606 | qcam->height = 60; | |
607 | qcam->mode = QC_DECIMATION_4; | |
d56410e0 | 608 | |
1da177e4 LT |
609 | if(vw->width>=160 && vw->height>=120) |
610 | { | |
611 | qcam->width = 160; | |
612 | qcam->height = 120; | |
613 | qcam->mode = QC_DECIMATION_2; | |
614 | } | |
615 | if(vw->width>=320 && vw->height>=240) | |
616 | { | |
617 | qcam->width = 320; | |
618 | qcam->height = 240; | |
619 | qcam->mode = QC_DECIMATION_1; | |
620 | } | |
621 | qcam->mode |= QC_MILLIONS; | |
622 | #if 0 | |
623 | if(vw->width>=640 && vw->height>=480) | |
624 | { | |
625 | qcam->width = 640; | |
626 | qcam->height = 480; | |
627 | qcam->mode = QC_BILLIONS | QC_DECIMATION_1; | |
628 | } | |
629 | #endif | |
d56410e0 | 630 | /* Ok we figured out what to use from our |
1da177e4 | 631 | wide choice */ |
3593cab5 | 632 | mutex_lock(&qcam->lock); |
1da177e4 LT |
633 | parport_claim_or_block(qcam->pdev); |
634 | qc_setup(qcam); | |
635 | parport_release(qcam->pdev); | |
3593cab5 | 636 | mutex_unlock(&qcam->lock); |
1da177e4 LT |
637 | return 0; |
638 | } | |
639 | case VIDIOCGWIN: | |
640 | { | |
641 | struct video_window *vw = arg; | |
642 | memset(vw, 0, sizeof(*vw)); | |
643 | vw->width=qcam->width; | |
644 | vw->height=qcam->height; | |
645 | return 0; | |
646 | } | |
647 | case VIDIOCKEY: | |
648 | return 0; | |
649 | case VIDIOCCAPTURE: | |
650 | case VIDIOCGFBUF: | |
651 | case VIDIOCSFBUF: | |
652 | case VIDIOCGFREQ: | |
653 | case VIDIOCSFREQ: | |
654 | case VIDIOCGAUDIO: | |
655 | case VIDIOCSAUDIO: | |
656 | return -EINVAL; | |
657 | default: | |
658 | return -ENOIOCTLCMD; | |
659 | } | |
660 | return 0; | |
661 | } | |
662 | ||
663 | static int qcam_ioctl(struct inode *inode, struct file *file, | |
664 | unsigned int cmd, unsigned long arg) | |
665 | { | |
666 | return video_usercopy(inode, file, cmd, arg, qcam_do_ioctl); | |
667 | } | |
668 | ||
669 | static ssize_t qcam_read(struct file *file, char __user *buf, | |
670 | size_t count, loff_t *ppos) | |
671 | { | |
672 | struct video_device *v = video_devdata(file); | |
673 | struct qcam_device *qcam=(struct qcam_device *)v; | |
674 | int len; | |
675 | ||
3593cab5 | 676 | mutex_lock(&qcam->lock); |
1da177e4 LT |
677 | parport_claim_or_block(qcam->pdev); |
678 | /* Probably should have a semaphore against multiple users */ | |
d56410e0 | 679 | len = qc_capture(qcam, buf,count); |
1da177e4 | 680 | parport_release(qcam->pdev); |
3593cab5 | 681 | mutex_unlock(&qcam->lock); |
1da177e4 LT |
682 | return len; |
683 | } | |
684 | ||
685 | /* video device template */ | |
686 | static struct file_operations qcam_fops = { | |
687 | .owner = THIS_MODULE, | |
688 | .open = video_exclusive_open, | |
689 | .release = video_exclusive_release, | |
690 | .ioctl = qcam_ioctl, | |
0d0fbf81 | 691 | .compat_ioctl = v4l_compat_ioctl32, |
1da177e4 LT |
692 | .read = qcam_read, |
693 | .llseek = no_llseek, | |
694 | }; | |
695 | ||
696 | static struct video_device qcam_template= | |
697 | { | |
698 | .owner = THIS_MODULE, | |
699 | .name = "Colour QuickCam", | |
700 | .type = VID_TYPE_CAPTURE, | |
701 | .hardware = VID_HARDWARE_QCAM_C, | |
702 | .fops = &qcam_fops, | |
703 | }; | |
704 | ||
705 | /* Initialize the QuickCam driver control structure. */ | |
706 | ||
707 | static struct qcam_device *qcam_init(struct parport *port) | |
708 | { | |
709 | struct qcam_device *q; | |
d56410e0 | 710 | |
1da177e4 LT |
711 | q = kmalloc(sizeof(struct qcam_device), GFP_KERNEL); |
712 | if(q==NULL) | |
713 | return NULL; | |
714 | ||
715 | q->pport = port; | |
716 | q->pdev = parport_register_device(port, "c-qcam", NULL, NULL, | |
717 | NULL, 0, NULL); | |
718 | ||
719 | q->bidirectional = (q->pport->modes & PARPORT_MODE_TRISTATE)?1:0; | |
720 | ||
d56410e0 | 721 | if (q->pdev == NULL) |
1da177e4 LT |
722 | { |
723 | printk(KERN_ERR "c-qcam: couldn't register for %s.\n", | |
724 | port->name); | |
725 | kfree(q); | |
726 | return NULL; | |
727 | } | |
d56410e0 | 728 | |
1da177e4 LT |
729 | memcpy(&q->vdev, &qcam_template, sizeof(qcam_template)); |
730 | ||
3593cab5 | 731 | mutex_init(&q->lock); |
1da177e4 LT |
732 | q->width = q->ccd_width = 320; |
733 | q->height = q->ccd_height = 240; | |
734 | q->mode = QC_MILLIONS | QC_DECIMATION_1; | |
735 | q->contrast = 192; | |
736 | q->brightness = 240; | |
737 | q->whitebal = 128; | |
738 | q->top = 1; | |
739 | q->left = 14; | |
740 | return q; | |
741 | } | |
742 | ||
743 | static struct qcam_device *qcams[MAX_CAMS]; | |
744 | static unsigned int num_cams = 0; | |
745 | ||
746 | static int init_cqcam(struct parport *port) | |
747 | { | |
748 | struct qcam_device *qcam; | |
749 | ||
750 | if (parport[0] != -1) | |
751 | { | |
752 | /* The user gave specific instructions */ | |
753 | int i, found = 0; | |
754 | for (i = 0; i < MAX_CAMS && parport[i] != -1; i++) | |
755 | { | |
756 | if (parport[0] == port->number) | |
757 | found = 1; | |
758 | } | |
759 | if (!found) | |
760 | return -ENODEV; | |
761 | } | |
762 | ||
763 | if (num_cams == MAX_CAMS) | |
764 | return -ENOSPC; | |
765 | ||
766 | qcam = qcam_init(port); | |
767 | if (qcam==NULL) | |
768 | return -ENODEV; | |
d56410e0 | 769 | |
1da177e4 LT |
770 | parport_claim_or_block(qcam->pdev); |
771 | ||
772 | qc_reset(qcam); | |
d56410e0 | 773 | |
1da177e4 LT |
774 | if (probe && qc_detect(qcam)==0) |
775 | { | |
776 | parport_release(qcam->pdev); | |
777 | parport_unregister_device(qcam->pdev); | |
778 | kfree(qcam); | |
779 | return -ENODEV; | |
780 | } | |
781 | ||
782 | qc_setup(qcam); | |
783 | ||
784 | parport_release(qcam->pdev); | |
d56410e0 | 785 | |
1da177e4 LT |
786 | if (video_register_device(&qcam->vdev, VFL_TYPE_GRABBER, video_nr)==-1) |
787 | { | |
788 | printk(KERN_ERR "Unable to register Colour QuickCam on %s\n", | |
789 | qcam->pport->name); | |
790 | parport_unregister_device(qcam->pdev); | |
791 | kfree(qcam); | |
792 | return -ENODEV; | |
793 | } | |
794 | ||
d56410e0 | 795 | printk(KERN_INFO "video%d: Colour QuickCam found on %s\n", |
1da177e4 | 796 | qcam->vdev.minor, qcam->pport->name); |
d56410e0 | 797 | |
1da177e4 LT |
798 | qcams[num_cams++] = qcam; |
799 | ||
800 | return 0; | |
801 | } | |
802 | ||
803 | static void close_cqcam(struct qcam_device *qcam) | |
804 | { | |
805 | video_unregister_device(&qcam->vdev); | |
806 | parport_unregister_device(qcam->pdev); | |
807 | kfree(qcam); | |
808 | } | |
809 | ||
810 | static void cq_attach(struct parport *port) | |
811 | { | |
812 | init_cqcam(port); | |
813 | } | |
814 | ||
815 | static void cq_detach(struct parport *port) | |
816 | { | |
817 | /* Write this some day. */ | |
818 | } | |
819 | ||
820 | static struct parport_driver cqcam_driver = { | |
821 | .name = "cqcam", | |
822 | .attach = cq_attach, | |
823 | .detach = cq_detach, | |
824 | }; | |
825 | ||
826 | static int __init cqcam_init (void) | |
827 | { | |
828 | printk(BANNER "\n"); | |
829 | ||
830 | return parport_register_driver(&cqcam_driver); | |
831 | } | |
832 | ||
833 | static void __exit cqcam_cleanup (void) | |
834 | { | |
835 | unsigned int i; | |
836 | ||
837 | for (i = 0; i < num_cams; i++) | |
838 | close_cqcam(qcams[i]); | |
839 | ||
840 | parport_unregister_driver(&cqcam_driver); | |
841 | } | |
842 | ||
843 | MODULE_AUTHOR("Philip Blundell <philb@gnu.org>"); | |
844 | MODULE_DESCRIPTION(BANNER); | |
845 | MODULE_LICENSE("GPL"); | |
846 | ||
847 | /* FIXME: parport=auto would never have worked, surely? --RR */ | |
848 | MODULE_PARM_DESC(parport ,"parport=<auto|n[,n]...> for port detection method\n\ | |
849 | probe=<0|1|2> for camera detection method\n\ | |
850 | force_rgb=<0|1> for RGB data format (default BGR)"); | |
851 | module_param_array(parport, int, NULL, 0); | |
852 | module_param(probe, int, 0); | |
853 | module_param(force_rgb, bool, 0); | |
854 | module_param(video_nr, int, 0); | |
855 | ||
856 | module_init(cqcam_init); | |
857 | module_exit(cqcam_cleanup); |