Commit | Line | Data |
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1e6dd65e MCC |
1 | /* |
2 | * Virtual Video driver - This code emulates a real video device with v4l2 api | |
3 | * | |
4 | * Copyright (c) 2006 by: | |
5 | * Mauro Carvalho Chehab <mchehab--a.t--infradead.org> | |
6 | * Ted Walther <ted--a.t--enumera.com> | |
7 | * John Sokol <sokol--a.t--videotechnology.com> | |
8 | * http://v4l.videotechnology.com/ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the BSD Licence, GNU General Public License | |
12 | * as published by the Free Software Foundation; either version 2 of the | |
13 | * License, or (at your option) any later version | |
14 | */ | |
15 | #include <linux/module.h> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/errno.h> | |
18 | #include <linux/fs.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/slab.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/ioport.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/sched.h> | |
25 | #include <linux/pci.h> | |
26 | #include <linux/random.h> | |
27 | #include <linux/version.h> | |
28 | #include <linux/videodev2.h> | |
f13df919 | 29 | #include <linux/interrupt.h> |
1e6dd65e MCC |
30 | #include <media/video-buf.h> |
31 | #include <media/v4l2-common.h> | |
32 | #include <linux/kthread.h> | |
33 | #include <linux/highmem.h> | |
34 | ||
35 | /* Wake up at about 30 fps */ | |
36 | #define WAKE_NUMERATOR 30 | |
37 | #define WAKE_DENOMINATOR 1001 | |
38 | #define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */ | |
39 | ||
40 | /* These timers are for 1 fps - used only for testing */ | |
41 | //#define WAKE_DENOMINATOR 30 /* hack for testing purposes */ | |
42 | //#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */ | |
43 | ||
44 | #include "font.h" | |
45 | ||
46 | #ifndef kzalloc | |
47 | #define kzalloc(size, flags) \ | |
48 | ({ \ | |
49 | void *__ret = kmalloc(size, flags); \ | |
50 | if (__ret) \ | |
51 | memset(__ret, 0, size); \ | |
52 | __ret; \ | |
53 | }) | |
54 | #endif | |
55 | ||
56 | MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board"); | |
280323dd | 57 | MODULE_AUTHOR("Mauro Carvalho Chehab, Ted Walther and John Sokol"); |
1e6dd65e MCC |
58 | MODULE_LICENSE("Dual BSD/GPL"); |
59 | ||
60 | #define VIVI_MAJOR_VERSION 0 | |
61 | #define VIVI_MINOR_VERSION 4 | |
62 | #define VIVI_RELEASE 0 | |
63 | #define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE) | |
64 | ||
65 | static int video_nr = -1; /* /dev/videoN, -1 for autodetect */ | |
66 | module_param(video_nr, int, 0); | |
67 | ||
68 | static int debug = 0; | |
69 | module_param(debug, int, 0); | |
70 | ||
71 | static unsigned int vid_limit = 16; | |
72 | module_param(vid_limit,int,0644); | |
73 | MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes"); | |
74 | ||
75 | /* supported controls */ | |
76 | static struct v4l2_queryctrl vivi_qctrl[] = { | |
77 | { | |
78 | .id = V4L2_CID_AUDIO_VOLUME, | |
79 | .name = "Volume", | |
80 | .minimum = 0, | |
81 | .maximum = 65535, | |
82 | .step = 65535/100, | |
83 | .default_value = 65535, | |
84 | .flags = 0, | |
85 | .type = V4L2_CTRL_TYPE_INTEGER, | |
86 | },{ | |
87 | .id = V4L2_CID_BRIGHTNESS, | |
88 | .type = V4L2_CTRL_TYPE_INTEGER, | |
89 | .name = "Brightness", | |
90 | .minimum = 0, | |
91 | .maximum = 255, | |
92 | .step = 1, | |
93 | .default_value = 127, | |
94 | .flags = 0, | |
95 | }, { | |
96 | .id = V4L2_CID_CONTRAST, | |
97 | .type = V4L2_CTRL_TYPE_INTEGER, | |
98 | .name = "Contrast", | |
99 | .minimum = 0, | |
100 | .maximum = 255, | |
101 | .step = 0x1, | |
102 | .default_value = 0x10, | |
103 | .flags = 0, | |
104 | }, { | |
105 | .id = V4L2_CID_SATURATION, | |
106 | .type = V4L2_CTRL_TYPE_INTEGER, | |
107 | .name = "Saturation", | |
108 | .minimum = 0, | |
109 | .maximum = 255, | |
110 | .step = 0x1, | |
111 | .default_value = 127, | |
112 | .flags = 0, | |
113 | }, { | |
114 | .id = V4L2_CID_HUE, | |
115 | .type = V4L2_CTRL_TYPE_INTEGER, | |
116 | .name = "Hue", | |
117 | .minimum = -128, | |
118 | .maximum = 127, | |
119 | .step = 0x1, | |
120 | .default_value = 0, | |
121 | .flags = 0, | |
122 | } | |
123 | }; | |
124 | ||
125 | static int qctl_regs[ARRAY_SIZE(vivi_qctrl)]; | |
126 | ||
127 | #define dprintk(level,fmt, arg...) \ | |
128 | do { \ | |
129 | if (debug >= (level)) \ | |
130 | printk(KERN_DEBUG "vivi: " fmt , ## arg); \ | |
131 | } while (0) | |
132 | ||
133 | /* ------------------------------------------------------------------ | |
134 | Basic structures | |
135 | ------------------------------------------------------------------*/ | |
136 | ||
137 | struct vivi_fmt { | |
138 | char *name; | |
139 | u32 fourcc; /* v4l2 format id */ | |
140 | int depth; | |
141 | }; | |
142 | ||
143 | static struct vivi_fmt format = { | |
144 | .name = "4:2:2, packed, YUYV", | |
145 | .fourcc = V4L2_PIX_FMT_YUYV, | |
146 | .depth = 16, | |
147 | }; | |
148 | ||
149 | struct sg_to_addr { | |
150 | int pos; | |
151 | struct scatterlist *sg; | |
152 | }; | |
153 | ||
154 | /* buffer for one video frame */ | |
155 | struct vivi_buffer { | |
156 | /* common v4l buffer stuff -- must be first */ | |
157 | struct videobuf_buffer vb; | |
158 | ||
159 | struct vivi_fmt *fmt; | |
160 | ||
161 | struct sg_to_addr *to_addr; | |
162 | }; | |
163 | ||
164 | struct vivi_dmaqueue { | |
165 | struct list_head active; | |
166 | struct list_head queued; | |
167 | struct timer_list timeout; | |
168 | ||
169 | /* thread for generating video stream*/ | |
170 | struct task_struct *kthread; | |
171 | wait_queue_head_t wq; | |
172 | /* Counters to control fps rate */ | |
173 | int frame; | |
174 | int ini_jiffies; | |
175 | }; | |
176 | ||
177 | static LIST_HEAD(vivi_devlist); | |
178 | ||
179 | struct vivi_dev { | |
180 | struct list_head vivi_devlist; | |
181 | ||
182 | struct semaphore lock; | |
183 | ||
184 | int users; | |
185 | ||
186 | /* various device info */ | |
187 | unsigned int resources; | |
188 | struct video_device video_dev; | |
189 | ||
190 | struct vivi_dmaqueue vidq; | |
191 | ||
192 | /* Several counters */ | |
193 | int h,m,s,us,jiffies; | |
194 | char timestr[13]; | |
195 | }; | |
196 | ||
197 | struct vivi_fh { | |
198 | struct vivi_dev *dev; | |
199 | ||
200 | /* video capture */ | |
201 | struct vivi_fmt *fmt; | |
202 | unsigned int width,height; | |
203 | struct videobuf_queue vb_vidq; | |
204 | ||
205 | enum v4l2_buf_type type; | |
206 | }; | |
207 | ||
208 | /* ------------------------------------------------------------------ | |
209 | DMA and thread functions | |
210 | ------------------------------------------------------------------*/ | |
211 | ||
212 | /* Bars and Colors should match positions */ | |
213 | ||
214 | enum colors { | |
215 | WHITE, | |
216 | AMBAR, | |
217 | CYAN, | |
218 | GREEN, | |
219 | MAGENTA, | |
220 | RED, | |
221 | BLUE | |
222 | }; | |
223 | ||
224 | static u8 bars[8][3] = { | |
225 | /* R G B */ | |
226 | {204,204,204}, /* white */ | |
227 | {208,208, 0}, /* ambar */ | |
228 | { 0,206,206}, /* cyan */ | |
229 | { 0,239, 0}, /* green */ | |
230 | {239, 0,239}, /* magenta */ | |
231 | {205, 0, 0}, /* red */ | |
232 | { 0, 0,255}, /* blue */ | |
233 | { 0, 0, 0} | |
234 | }; | |
235 | ||
236 | #define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16) | |
237 | /* RGB to V(Cr) Color transform */ | |
238 | #define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128) | |
239 | /* RGB to U(Cb) Color transform */ | |
240 | #define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128) | |
241 | ||
242 | #define TSTAMP_MIN_Y 24 | |
243 | #define TSTAMP_MAX_Y TSTAMP_MIN_Y+15 | |
244 | #define TSTAMP_MIN_X 64 | |
245 | ||
246 | void prep_to_addr(struct sg_to_addr to_addr[],struct videobuf_buffer *vb) | |
247 | { | |
248 | int i, pos=0; | |
249 | ||
250 | for (i=0;i<vb->dma.nr_pages;i++) { | |
251 | to_addr[i].sg=&vb->dma.sglist[i]; | |
252 | to_addr[i].pos=pos; | |
253 | pos += vb->dma.sglist[i].length; | |
254 | } | |
255 | } | |
256 | ||
257 | inline int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[]) | |
258 | { | |
259 | int p1=0,p2=pages-1,p3=pages/2; | |
260 | ||
261 | /* Sanity test */ | |
262 | BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length); | |
263 | ||
264 | while (p1+1<p2) { | |
265 | if (pos < to_addr[p3].pos) { | |
266 | p2=p3; | |
267 | } else { | |
268 | p1=p3; | |
269 | } | |
270 | p3=(p1+p2)/2; | |
271 | } | |
272 | if (pos >= to_addr[p2].pos) | |
273 | p1=p2; | |
274 | ||
275 | return (p1); | |
276 | } | |
277 | ||
278 | void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax, | |
279 | int hmax, int line, char *timestr) | |
280 | { | |
281 | int w,i,j,pos=inipos,pgpos,oldpg,y; | |
282 | char *p,*s,*basep; | |
283 | struct page *pg; | |
284 | u8 chr,r,g,b,color; | |
285 | ||
286 | /* Get first addr pointed to pixel position */ | |
287 | oldpg=get_addr_pos(pos,pages,to_addr); | |
288 | pg=pfn_to_page(to_addr[oldpg].sg->dma_address >> PAGE_SHIFT); | |
289 | basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset; | |
290 | ||
291 | /* We will just duplicate the second pixel at the packet */ | |
292 | wmax/=2; | |
293 | ||
294 | /* Generate a standard color bar pattern */ | |
295 | for (w=0;w<wmax;w++) { | |
296 | r=bars[w*7/wmax][0]; | |
297 | g=bars[w*7/wmax][1]; | |
298 | b=bars[w*7/wmax][2]; | |
299 | ||
300 | for (color=0;color<4;color++) { | |
301 | pgpos=get_addr_pos(pos,pages,to_addr); | |
302 | if (pgpos!=oldpg) { | |
303 | pg=pfn_to_page(to_addr[pgpos].sg->dma_address >> PAGE_SHIFT); | |
304 | kunmap_atomic(basep, KM_BOUNCE_READ); | |
305 | basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset; | |
306 | oldpg=pgpos; | |
307 | } | |
308 | p=basep+pos-to_addr[pgpos].pos; | |
309 | ||
310 | switch (color) { | |
311 | case 0: | |
312 | case 2: | |
313 | *p=TO_Y(r,g,b); /* Luminance */ | |
314 | break; | |
315 | case 1: | |
316 | *p=TO_U(r,g,b); /* Cb */ | |
317 | break; | |
318 | case 3: | |
319 | *p=TO_V(r,g,b); /* Cr */ | |
320 | break; | |
321 | } | |
322 | pos++; | |
323 | } | |
324 | } | |
325 | ||
326 | /* Checks if it is possible to show timestamp */ | |
327 | if (TSTAMP_MAX_Y>=hmax) | |
328 | goto end; | |
329 | if (TSTAMP_MIN_X+strlen(timestr)>=wmax) | |
330 | goto end; | |
331 | ||
332 | /* Print stream time */ | |
333 | if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) { | |
334 | j=TSTAMP_MIN_X; | |
335 | for (s=timestr;*s;s++) { | |
336 | chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y]; | |
337 | for (i=0;i<7;i++) { | |
338 | if (chr&1<<(7-i)) { /* Font color*/ | |
339 | r=bars[BLUE][0]; | |
340 | g=bars[BLUE][1]; | |
341 | b=bars[BLUE][2]; | |
342 | r=g=b=0; | |
343 | g=198; | |
344 | } else { /* Background color */ | |
345 | r=bars[WHITE][0]; | |
346 | g=bars[WHITE][1]; | |
347 | b=bars[WHITE][2]; | |
348 | r=g=b=0; | |
349 | } | |
350 | ||
351 | pos=inipos+j*2; | |
352 | for (color=0;color<4;color++) { | |
353 | pgpos=get_addr_pos(pos,pages,to_addr); | |
354 | if (pgpos!=oldpg) { | |
355 | pg=pfn_to_page(to_addr[pgpos]. | |
356 | sg->dma_address | |
357 | >> PAGE_SHIFT); | |
358 | kunmap_atomic(basep, | |
359 | KM_BOUNCE_READ); | |
360 | basep= kmap_atomic(pg, | |
361 | KM_BOUNCE_READ)+ | |
362 | to_addr[pgpos].sg->offset; | |
363 | oldpg=pgpos; | |
364 | } | |
365 | p=basep+pos-to_addr[pgpos].pos; | |
366 | ||
367 | y=TO_Y(r,g,b); | |
368 | ||
369 | switch (color) { | |
370 | case 0: | |
371 | case 2: | |
372 | *p=TO_Y(r,g,b); /* Luminance */ | |
373 | break; | |
374 | case 1: | |
375 | *p=TO_U(r,g,b); /* Cb */ | |
376 | break; | |
377 | case 3: | |
378 | *p=TO_V(r,g,b); /* Cr */ | |
379 | break; | |
380 | } | |
381 | pos++; | |
382 | } | |
383 | j++; | |
384 | } | |
385 | } | |
386 | } | |
387 | ||
388 | ||
389 | end: | |
390 | kunmap_atomic(basep, KM_BOUNCE_READ); | |
391 | } | |
392 | static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf) | |
393 | { | |
394 | int h,pos=0; | |
395 | int hmax = buf->vb.height; | |
396 | int wmax = buf->vb.width; | |
397 | struct videobuf_buffer *vb=&buf->vb; | |
398 | struct sg_to_addr *to_addr=buf->to_addr; | |
399 | struct timeval ts; | |
400 | ||
401 | /* Test if DMA mapping is ready */ | |
402 | if (!vb->dma.sglist[0].dma_address) | |
403 | return; | |
404 | ||
405 | prep_to_addr(to_addr,vb); | |
406 | ||
407 | /* Check if there is enough memory */ | |
408 | BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2); | |
409 | ||
410 | for (h=0;h<hmax;h++) { | |
411 | gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr); | |
412 | pos += wmax*2; | |
413 | } | |
414 | ||
415 | /* Updates stream time */ | |
416 | ||
417 | dev->us+=jiffies_to_usecs(jiffies-dev->jiffies); | |
418 | dev->jiffies=jiffies; | |
419 | if (dev->us>=1000000) { | |
420 | dev->us-=1000000; | |
421 | dev->s++; | |
422 | if (dev->s>=60) { | |
423 | dev->s-=60; | |
424 | dev->m++; | |
425 | if (dev->m>60) { | |
426 | dev->m-=60; | |
427 | dev->h++; | |
428 | if (dev->h>24) | |
429 | dev->h-=24; | |
430 | } | |
431 | } | |
432 | } | |
433 | sprintf(dev->timestr,"%02d:%02d:%02d:%03d", | |
434 | dev->h,dev->m,dev->s,(dev->us+500)/1000); | |
435 | ||
436 | dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr, | |
437 | (unsigned long)buf->vb.dma.vmalloc,pos); | |
438 | ||
439 | /* Advice that buffer was filled */ | |
440 | buf->vb.state = STATE_DONE; | |
441 | buf->vb.field_count++; | |
442 | do_gettimeofday(&ts); | |
443 | buf->vb.ts = ts; | |
444 | ||
445 | list_del(&buf->vb.queue); | |
446 | wake_up(&buf->vb.done); | |
447 | } | |
448 | ||
449 | static int restart_video_queue(struct vivi_dmaqueue *dma_q); | |
450 | ||
451 | static void vivi_thread_tick(struct vivi_dmaqueue *dma_q) | |
452 | { | |
453 | struct vivi_buffer *buf; | |
454 | struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq); | |
455 | ||
456 | int bc; | |
457 | ||
458 | /* Announces videobuf that all went ok */ | |
459 | for (bc = 0;; bc++) { | |
460 | if (list_empty(&dma_q->active)) { | |
461 | dprintk(1,"No active queue to serve\n"); | |
462 | break; | |
463 | } | |
464 | ||
465 | buf = list_entry(dma_q->active.next, | |
466 | struct vivi_buffer, vb.queue); | |
467 | ||
468 | /* Nobody is waiting something to be done, just return */ | |
469 | if (!waitqueue_active(&buf->vb.done)) { | |
470 | mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT); | |
471 | return; | |
472 | } | |
473 | ||
474 | do_gettimeofday(&buf->vb.ts); | |
475 | dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i); | |
476 | ||
477 | /* Fill buffer */ | |
478 | vivi_fillbuff(dev,buf); | |
479 | } | |
480 | if (list_empty(&dma_q->active)) { | |
481 | del_timer(&dma_q->timeout); | |
482 | } else { | |
483 | mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT); | |
484 | } | |
485 | if (bc != 1) | |
486 | dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc); | |
487 | } | |
488 | ||
489 | void vivi_sleep(struct vivi_dmaqueue *dma_q) | |
490 | { | |
491 | int timeout; | |
492 | DECLARE_WAITQUEUE(wait, current); | |
493 | ||
494 | dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q); | |
495 | ||
496 | add_wait_queue(&dma_q->wq, &wait); | |
497 | if (!kthread_should_stop()) { | |
498 | dma_q->frame++; | |
499 | ||
500 | /* Calculate time to wake up */ | |
501 | timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies; | |
502 | ||
503 | if (timeout <= 0) { | |
504 | int old=dma_q->frame; | |
505 | dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1; | |
506 | ||
507 | timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies; | |
508 | ||
509 | dprintk(1,"underrun, losed %d frames. " | |
510 | "Now, frame is %d. Waking on %d jiffies\n", | |
511 | dma_q->frame-old,dma_q->frame,timeout); | |
512 | } else | |
513 | dprintk(1,"will sleep for %i jiffies\n",timeout); | |
514 | ||
515 | vivi_thread_tick(dma_q); | |
516 | ||
517 | schedule_timeout_interruptible (timeout); | |
518 | } | |
519 | ||
520 | remove_wait_queue(&dma_q->wq, &wait); | |
521 | try_to_freeze(); | |
522 | } | |
523 | ||
524 | int vivi_thread(void *data) | |
525 | { | |
526 | struct vivi_dmaqueue *dma_q=data; | |
527 | ||
528 | dprintk(1,"thread started\n"); | |
529 | ||
530 | for (;;) { | |
531 | vivi_sleep(dma_q); | |
532 | ||
533 | if (kthread_should_stop()) | |
534 | break; | |
535 | } | |
536 | dprintk(1, "thread: exit\n"); | |
537 | return 0; | |
538 | } | |
539 | ||
540 | int vivi_start_thread(struct vivi_dmaqueue *dma_q) | |
541 | { | |
542 | dma_q->frame=0; | |
543 | dma_q->ini_jiffies=jiffies; | |
544 | ||
545 | dprintk(1,"%s\n",__FUNCTION__); | |
546 | init_waitqueue_head(&dma_q->wq); | |
547 | ||
548 | dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi"); | |
549 | ||
550 | if (dma_q->kthread == NULL) { | |
551 | printk(KERN_ERR "vivi: kernel_thread() failed\n"); | |
552 | return -EINVAL; | |
553 | } | |
554 | dprintk(1,"returning from %s\n",__FUNCTION__); | |
555 | return 0; | |
556 | } | |
557 | ||
558 | void vivi_stop_thread(struct vivi_dmaqueue *dma_q) | |
559 | { | |
560 | dprintk(1,"%s\n",__FUNCTION__); | |
561 | /* shutdown control thread */ | |
562 | if (dma_q->kthread) { | |
563 | kthread_stop(dma_q->kthread); | |
564 | dma_q->kthread=NULL; | |
565 | } | |
566 | } | |
567 | ||
568 | static int restart_video_queue(struct vivi_dmaqueue *dma_q) | |
569 | { | |
570 | struct vivi_buffer *buf, *prev; | |
571 | struct list_head *item; | |
572 | ||
573 | dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q); | |
574 | ||
575 | if (!list_empty(&dma_q->active)) { | |
576 | buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue); | |
577 | dprintk(2,"restart_queue [%p/%d]: restart dma\n", | |
578 | buf, buf->vb.i); | |
579 | ||
580 | dprintk(1,"Restarting video dma\n"); | |
581 | vivi_stop_thread(dma_q); | |
582 | // vivi_start_thread(dma_q); | |
583 | ||
584 | /* cancel all outstanding capture / vbi requests */ | |
585 | list_for_each(item,&dma_q->active) { | |
586 | buf = list_entry(item, struct vivi_buffer, vb.queue); | |
587 | ||
588 | list_del(&buf->vb.queue); | |
589 | buf->vb.state = STATE_ERROR; | |
590 | wake_up(&buf->vb.done); | |
591 | } | |
592 | mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT); | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | prev = NULL; | |
598 | for (;;) { | |
599 | if (list_empty(&dma_q->queued)) | |
600 | return 0; | |
601 | buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue); | |
602 | if (NULL == prev) { | |
603 | list_del(&buf->vb.queue); | |
604 | list_add_tail(&buf->vb.queue,&dma_q->active); | |
605 | ||
606 | dprintk(1,"Restarting video dma\n"); | |
607 | vivi_stop_thread(dma_q); | |
608 | vivi_start_thread(dma_q); | |
609 | ||
610 | buf->vb.state = STATE_ACTIVE; | |
611 | mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT); | |
612 | dprintk(2,"[%p/%d] restart_queue - first active\n", | |
613 | buf,buf->vb.i); | |
614 | ||
615 | } else if (prev->vb.width == buf->vb.width && | |
616 | prev->vb.height == buf->vb.height && | |
617 | prev->fmt == buf->fmt) { | |
618 | list_del(&buf->vb.queue); | |
619 | list_add_tail(&buf->vb.queue,&dma_q->active); | |
620 | buf->vb.state = STATE_ACTIVE; | |
621 | dprintk(2,"[%p/%d] restart_queue - move to active\n", | |
622 | buf,buf->vb.i); | |
623 | } else { | |
624 | return 0; | |
625 | } | |
626 | prev = buf; | |
627 | } | |
628 | } | |
629 | ||
630 | static void vivi_vid_timeout(unsigned long data) | |
631 | { | |
632 | struct vivi_dev *dev = (struct vivi_dev*)data; | |
633 | struct vivi_dmaqueue *vidq = &dev->vidq; | |
634 | struct vivi_buffer *buf; | |
635 | ||
636 | while (!list_empty(&vidq->active)) { | |
637 | buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue); | |
638 | list_del(&buf->vb.queue); | |
639 | buf->vb.state = STATE_ERROR; | |
640 | wake_up(&buf->vb.done); | |
641 | printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i); | |
642 | } | |
643 | ||
644 | restart_video_queue(vidq); | |
645 | } | |
646 | ||
647 | /* ------------------------------------------------------------------ | |
648 | Videobuf operations | |
649 | ------------------------------------------------------------------*/ | |
650 | static int | |
651 | buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size) | |
652 | { | |
653 | struct vivi_fh *fh = vq->priv_data; | |
654 | ||
655 | *size = fh->width*fh->height*2; | |
656 | ||
657 | if (0 == *count) | |
658 | *count = 32; | |
659 | while (*size * *count > vid_limit * 1024 * 1024) | |
660 | (*count)--; | |
661 | return 0; | |
662 | } | |
663 | ||
664 | void | |
665 | free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf) | |
666 | { | |
667 | dprintk(1,"%s\n",__FUNCTION__); | |
668 | ||
669 | if (in_interrupt()) | |
670 | BUG(); | |
671 | ||
672 | /*FIXME: Maybe a spinlock is required here */ | |
673 | kfree(buf->to_addr); | |
674 | buf->to_addr=NULL; | |
675 | ||
676 | videobuf_waiton(&buf->vb,0,0); | |
677 | videobuf_dma_unmap(vq, &buf->vb.dma); | |
678 | videobuf_dma_free(&buf->vb.dma); | |
679 | buf->vb.state = STATE_NEEDS_INIT; | |
680 | } | |
681 | ||
682 | #define norm_maxw() 1024 | |
683 | #define norm_maxh() 768 | |
684 | static int | |
685 | buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb, | |
686 | enum v4l2_field field) | |
687 | { | |
688 | struct vivi_fh *fh = vq->priv_data; | |
689 | struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb); | |
690 | int rc, init_buffer = 0; | |
691 | ||
692 | // dprintk(1,"%s, field=%d\n",__FUNCTION__,field); | |
693 | ||
694 | BUG_ON(NULL == fh->fmt); | |
695 | if (fh->width < 48 || fh->width > norm_maxw() || | |
696 | fh->height < 32 || fh->height > norm_maxh()) | |
697 | return -EINVAL; | |
698 | buf->vb.size = fh->width*fh->height*2; | |
699 | if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size) | |
700 | return -EINVAL; | |
701 | ||
702 | if (buf->fmt != fh->fmt || | |
703 | buf->vb.width != fh->width || | |
704 | buf->vb.height != fh->height || | |
705 | buf->vb.field != field) { | |
706 | buf->fmt = fh->fmt; | |
707 | buf->vb.width = fh->width; | |
708 | buf->vb.height = fh->height; | |
709 | buf->vb.field = field; | |
710 | init_buffer = 1; | |
711 | } | |
712 | ||
713 | if (STATE_NEEDS_INIT == buf->vb.state) { | |
714 | if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL))) | |
715 | goto fail; | |
716 | } | |
717 | ||
718 | buf->vb.state = STATE_PREPARED; | |
719 | ||
720 | if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) { | |
721 | rc=-ENOMEM; | |
722 | goto fail; | |
723 | } | |
724 | ||
725 | return 0; | |
726 | ||
727 | fail: | |
728 | free_buffer(vq,buf); | |
729 | return rc; | |
730 | } | |
731 | ||
732 | static void | |
733 | buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb) | |
734 | { | |
735 | struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb); | |
736 | struct vivi_fh *fh = vq->priv_data; | |
737 | struct vivi_dev *dev = fh->dev; | |
738 | struct vivi_dmaqueue *vidq = &dev->vidq; | |
739 | struct vivi_buffer *prev; | |
740 | ||
741 | if (!list_empty(&vidq->queued)) { | |
742 | dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue); | |
743 | list_add_tail(&buf->vb.queue,&vidq->queued); | |
744 | buf->vb.state = STATE_QUEUED; | |
745 | dprintk(2,"[%p/%d] buffer_queue - append to queued\n", | |
746 | buf, buf->vb.i); | |
747 | } else if (list_empty(&vidq->active)) { | |
748 | list_add_tail(&buf->vb.queue,&vidq->active); | |
749 | ||
750 | buf->vb.state = STATE_ACTIVE; | |
751 | mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT); | |
752 | dprintk(2,"[%p/%d] buffer_queue - first active\n", | |
753 | buf, buf->vb.i); | |
754 | ||
755 | vivi_start_thread(vidq); | |
756 | } else { | |
757 | prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue); | |
758 | if (prev->vb.width == buf->vb.width && | |
759 | prev->vb.height == buf->vb.height && | |
760 | prev->fmt == buf->fmt) { | |
761 | list_add_tail(&buf->vb.queue,&vidq->active); | |
762 | buf->vb.state = STATE_ACTIVE; | |
763 | dprintk(2,"[%p/%d] buffer_queue - append to active\n", | |
764 | buf, buf->vb.i); | |
765 | ||
766 | } else { | |
767 | list_add_tail(&buf->vb.queue,&vidq->queued); | |
768 | buf->vb.state = STATE_QUEUED; | |
769 | dprintk(2,"[%p/%d] buffer_queue - first queued\n", | |
770 | buf, buf->vb.i); | |
771 | } | |
772 | } | |
773 | } | |
774 | ||
775 | static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb) | |
776 | { | |
777 | struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb); | |
778 | struct vivi_fh *fh = vq->priv_data; | |
779 | struct vivi_dev *dev = (struct vivi_dev*)fh->dev; | |
780 | struct vivi_dmaqueue *vidq = &dev->vidq; | |
781 | ||
782 | dprintk(1,"%s\n",__FUNCTION__); | |
783 | ||
784 | vivi_stop_thread(vidq); | |
785 | ||
786 | free_buffer(vq,buf); | |
787 | } | |
788 | ||
789 | int vivi_map_sg (void *dev, struct scatterlist *sg, int nents, | |
790 | int direction) | |
791 | { | |
792 | int i; | |
793 | ||
794 | dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents); | |
795 | BUG_ON(direction == DMA_NONE); | |
796 | ||
797 | for (i = 0; i < nents; i++ ) { | |
798 | BUG_ON(!sg[i].page); | |
799 | ||
800 | sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset; | |
801 | } | |
802 | ||
803 | return nents; | |
804 | } | |
805 | ||
806 | int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages, | |
807 | int direction) | |
808 | { | |
809 | dprintk(1,"%s\n",__FUNCTION__); | |
810 | return 0; | |
811 | } | |
812 | ||
813 | int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist,int nr_pages, | |
814 | int direction) | |
815 | { | |
816 | // dprintk(1,"%s\n",__FUNCTION__); | |
817 | ||
818 | // flush_write_buffers(); | |
819 | return 0; | |
820 | } | |
821 | ||
822 | static struct videobuf_queue_ops vivi_video_qops = { | |
823 | .buf_setup = buffer_setup, | |
824 | .buf_prepare = buffer_prepare, | |
825 | .buf_queue = buffer_queue, | |
826 | .buf_release = buffer_release, | |
827 | ||
828 | /* Non-pci handling routines */ | |
829 | .vb_map_sg = vivi_map_sg, | |
830 | .vb_dma_sync_sg = vivi_dma_sync_sg, | |
831 | .vb_unmap_sg = vivi_unmap_sg, | |
832 | }; | |
833 | ||
834 | /* ------------------------------------------------------------------ | |
835 | IOCTL handling | |
836 | ------------------------------------------------------------------*/ | |
837 | ||
838 | static int vivi_try_fmt(struct vivi_dev *dev, struct vivi_fh *fh, | |
839 | struct v4l2_format *f) | |
840 | { | |
841 | struct vivi_fmt *fmt; | |
842 | enum v4l2_field field; | |
843 | unsigned int maxw, maxh; | |
844 | ||
845 | if (format.fourcc != f->fmt.pix.pixelformat) { | |
846 | dprintk(1,"Fourcc format invalid.\n"); | |
847 | return -EINVAL; | |
848 | } | |
849 | fmt=&format; | |
850 | ||
851 | field = f->fmt.pix.field; | |
852 | ||
853 | if (field == V4L2_FIELD_ANY) { | |
854 | // field=V4L2_FIELD_INTERLACED; | |
855 | field=V4L2_FIELD_SEQ_TB; | |
856 | } else if (V4L2_FIELD_INTERLACED != field) { | |
857 | dprintk(1,"Field type invalid.\n"); | |
858 | return -EINVAL; | |
859 | } | |
860 | ||
861 | maxw = norm_maxw(); | |
862 | maxh = norm_maxh(); | |
863 | ||
864 | f->fmt.pix.field = field; | |
865 | if (f->fmt.pix.height < 32) | |
866 | f->fmt.pix.height = 32; | |
867 | if (f->fmt.pix.height > maxh) | |
868 | f->fmt.pix.height = maxh; | |
869 | if (f->fmt.pix.width < 48) | |
870 | f->fmt.pix.width = 48; | |
871 | if (f->fmt.pix.width > maxw) | |
872 | f->fmt.pix.width = maxw; | |
873 | f->fmt.pix.width &= ~0x03; | |
874 | f->fmt.pix.bytesperline = | |
875 | (f->fmt.pix.width * fmt->depth) >> 3; | |
876 | f->fmt.pix.sizeimage = | |
877 | f->fmt.pix.height * f->fmt.pix.bytesperline; | |
878 | ||
879 | return 0; | |
880 | } | |
881 | ||
882 | static int res_get(struct vivi_dev *dev, struct vivi_fh *fh) | |
883 | { | |
884 | /* is it free? */ | |
885 | down(&dev->lock); | |
886 | if (dev->resources) { | |
887 | /* no, someone else uses it */ | |
888 | up(&dev->lock); | |
889 | return 0; | |
890 | } | |
891 | /* it's free, grab it */ | |
892 | dev->resources =1; | |
893 | dprintk(1,"res: get\n"); | |
894 | up(&dev->lock); | |
895 | return 1; | |
896 | } | |
897 | ||
898 | static inline int res_locked(struct vivi_dev *dev) | |
899 | { | |
900 | return (dev->resources); | |
901 | } | |
902 | ||
903 | static void res_free(struct vivi_dev *dev, struct vivi_fh *fh) | |
904 | { | |
905 | down(&dev->lock); | |
906 | dev->resources = 0; | |
907 | dprintk(1,"res: put\n"); | |
908 | up(&dev->lock); | |
909 | } | |
910 | ||
911 | static int vivi_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg) | |
912 | { | |
913 | struct vivi_fh *fh = file->private_data; | |
914 | struct vivi_dev *dev = fh->dev; | |
915 | int ret=0; | |
916 | ||
917 | if (debug) { | |
918 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
919 | v4l_printk_ioctl_arg("vivi(w)",cmd, arg); | |
920 | else if (!_IOC_DIR(cmd) & _IOC_READ) { | |
921 | v4l_print_ioctl("vivi", cmd); | |
922 | } | |
923 | } | |
924 | ||
925 | switch(cmd) { | |
926 | /* --- capabilities ------------------------------------------ */ | |
927 | case VIDIOC_QUERYCAP: | |
928 | { | |
929 | struct v4l2_capability *cap = (struct v4l2_capability*)arg; | |
930 | ||
931 | memset(cap, 0, sizeof(*cap)); | |
932 | ||
933 | strcpy(cap->driver, "vivi"); | |
934 | strcpy(cap->card, "vivi"); | |
935 | cap->version = VIVI_VERSION; | |
936 | cap->capabilities = | |
937 | V4L2_CAP_VIDEO_CAPTURE | | |
938 | V4L2_CAP_STREAMING | | |
939 | V4L2_CAP_READWRITE; | |
940 | break; | |
941 | } | |
942 | /* --- capture ioctls ---------------------------------------- */ | |
943 | case VIDIOC_ENUM_FMT: | |
944 | { | |
945 | struct v4l2_fmtdesc *f = arg; | |
946 | enum v4l2_buf_type type; | |
947 | unsigned int index; | |
948 | ||
949 | index = f->index; | |
950 | type = f->type; | |
951 | ||
952 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
953 | ret=-EINVAL; | |
954 | break; | |
955 | } | |
956 | ||
957 | switch (type) { | |
958 | case V4L2_BUF_TYPE_VIDEO_CAPTURE: | |
959 | if (index > 0){ | |
960 | ret=-EINVAL; | |
961 | break; | |
962 | } | |
963 | memset(f,0,sizeof(*f)); | |
964 | ||
965 | f->index = index; | |
966 | f->type = type; | |
967 | strlcpy(f->description,format.name,sizeof(f->description)); | |
968 | f->pixelformat = format.fourcc; | |
969 | break; | |
970 | default: | |
971 | ret=-EINVAL; | |
972 | } | |
973 | break; | |
974 | } | |
975 | case VIDIOC_G_FMT: | |
976 | { | |
977 | struct v4l2_format *f = (struct v4l2_format *)arg; | |
978 | ||
979 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
980 | ret=-EINVAL; | |
981 | break; | |
982 | } | |
983 | ||
984 | memset(&f->fmt.pix,0,sizeof(f->fmt.pix)); | |
985 | f->fmt.pix.width = fh->width; | |
986 | f->fmt.pix.height = fh->height; | |
987 | f->fmt.pix.field = fh->vb_vidq.field; | |
988 | f->fmt.pix.pixelformat = fh->fmt->fourcc; | |
989 | f->fmt.pix.bytesperline = | |
990 | (f->fmt.pix.width * fh->fmt->depth) >> 3; | |
991 | f->fmt.pix.sizeimage = | |
992 | f->fmt.pix.height * f->fmt.pix.bytesperline; | |
993 | break; | |
994 | } | |
995 | case VIDIOC_S_FMT: | |
996 | { | |
997 | struct v4l2_format *f = arg; | |
998 | ||
999 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
1000 | dprintk(1,"Only capture supported.\n"); | |
1001 | ret=-EINVAL; | |
1002 | break; | |
1003 | } | |
1004 | ||
1005 | ret = vivi_try_fmt(dev,fh,f); | |
1006 | if (ret < 0) | |
1007 | break; | |
1008 | ||
1009 | fh->fmt = &format; | |
1010 | fh->width = f->fmt.pix.width; | |
1011 | fh->height = f->fmt.pix.height; | |
1012 | fh->vb_vidq.field = f->fmt.pix.field; | |
1013 | fh->type = f->type; | |
1014 | ||
1015 | break; | |
1016 | } | |
1017 | case VIDIOC_TRY_FMT: | |
1018 | { | |
1019 | struct v4l2_format *f = arg; | |
1020 | if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
1021 | ret=-EINVAL; | |
1022 | break; | |
1023 | } | |
1024 | ||
1025 | ret=vivi_try_fmt(dev,fh,f); | |
1026 | break; | |
1027 | } | |
1028 | case VIDIOC_REQBUFS: | |
1029 | if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
1030 | ret=-EINVAL; | |
1031 | break; | |
1032 | } | |
1033 | ret=videobuf_reqbufs(&fh->vb_vidq, arg); | |
1034 | break; | |
1035 | case VIDIOC_QUERYBUF: | |
1036 | if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
1037 | ret=-EINVAL; | |
1038 | break; | |
1039 | } | |
1040 | ret=videobuf_querybuf(&fh->vb_vidq, arg); | |
1041 | break; | |
1042 | case VIDIOC_QBUF: | |
1043 | if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
1044 | ret=-EINVAL; | |
1045 | break; | |
1046 | } | |
1047 | ret=videobuf_qbuf(&fh->vb_vidq, arg); | |
1048 | break; | |
1049 | case VIDIOC_DQBUF: | |
1050 | if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
1051 | ret=-EINVAL; | |
1052 | break; | |
1053 | } | |
1054 | ret=videobuf_dqbuf(&fh->vb_vidq, arg, | |
1055 | file->f_flags & O_NONBLOCK); | |
1056 | break; | |
1057 | #ifdef HAVE_V4L1 | |
1058 | /* --- streaming capture ------------------------------------- */ | |
1059 | case VIDIOCGMBUF: | |
1060 | { | |
1061 | struct video_mbuf *mbuf = arg; | |
1062 | struct videobuf_queue *q=&fh->vb_vidq; | |
1063 | struct v4l2_requestbuffers req; | |
1064 | unsigned int i; | |
1065 | ||
1066 | memset(&req,0,sizeof(req)); | |
1067 | req.type = q->type; | |
1068 | req.count = 8; | |
1069 | req.memory = V4L2_MEMORY_MMAP; | |
1070 | ret = videobuf_reqbufs(q,&req); | |
1071 | if (ret < 0) | |
1072 | break; | |
1073 | memset(mbuf,0,sizeof(*mbuf)); | |
1074 | mbuf->frames = req.count; | |
1075 | mbuf->size = 0; | |
1076 | for (i = 0; i < mbuf->frames; i++) { | |
1077 | mbuf->offsets[i] = q->bufs[i]->boff; | |
1078 | mbuf->size += q->bufs[i]->bsize; | |
1079 | } | |
1080 | break; | |
1081 | } | |
1082 | #endif | |
1083 | case VIDIOC_STREAMON: | |
1084 | { | |
1085 | if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) | |
1086 | return -EINVAL; | |
1087 | if (!res_get(dev,fh)) | |
1088 | return -EBUSY; | |
1089 | ret=videobuf_streamon(&fh->vb_vidq); | |
1090 | break; | |
1091 | } | |
1092 | case VIDIOC_STREAMOFF: | |
1093 | { | |
1094 | if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
1095 | ret=-EINVAL; | |
1096 | break; | |
1097 | } | |
1098 | ret = videobuf_streamoff(&fh->vb_vidq); | |
1099 | if (ret < 0) | |
1100 | break; | |
1101 | res_free(dev,fh); | |
1102 | break; | |
1103 | } | |
1104 | /* ---------- tv norms ---------- */ | |
1105 | case VIDIOC_ENUMSTD: | |
1106 | { | |
1107 | struct v4l2_standard *e = arg; | |
1108 | ||
1109 | if (e->index>0) { | |
1110 | ret=-EINVAL; | |
1111 | break; | |
1112 | } | |
1113 | ret = v4l2_video_std_construct(e, V4L2_STD_NTSC_M, "NTSC-M"); | |
1114 | ||
1115 | /* Allows vivi to use different fps from video std */ | |
1116 | e->frameperiod.numerator = WAKE_NUMERATOR; | |
1117 | e->frameperiod.denominator = WAKE_DENOMINATOR; | |
1118 | ||
1119 | break; | |
1120 | } | |
1121 | case VIDIOC_G_STD: | |
1122 | { | |
1123 | v4l2_std_id *id = arg; | |
1124 | ||
1125 | *id = V4L2_STD_NTSC_M; | |
1126 | break; | |
1127 | } | |
1128 | case VIDIOC_S_STD: | |
1129 | { | |
1130 | break; | |
1131 | } | |
1132 | /* ------ input switching ---------- */ | |
1133 | case VIDIOC_ENUMINPUT: | |
1134 | { /* only one input in this sample driver */ | |
1135 | struct v4l2_input *inp = arg; | |
1136 | ||
1137 | if (inp->index != 0) { | |
1138 | ret=-EINVAL; | |
1139 | break; | |
1140 | } | |
1141 | memset(inp, 0, sizeof(*inp)); | |
1142 | ||
1143 | inp->index = 0; | |
1144 | inp->type = V4L2_INPUT_TYPE_CAMERA; | |
1145 | inp->std = V4L2_STD_NTSC_M; | |
1146 | strcpy(inp->name,"Camera"); | |
1147 | break; | |
1148 | } | |
1149 | case VIDIOC_G_INPUT: | |
1150 | { | |
1151 | unsigned int *i = arg; | |
1152 | ||
1153 | *i = 0; | |
1154 | break; | |
1155 | } | |
1156 | case VIDIOC_S_INPUT: | |
1157 | { | |
1158 | unsigned int *i = arg; | |
1159 | ||
1160 | if (*i > 0) | |
1161 | ret=-EINVAL; | |
1162 | break; | |
1163 | } | |
1164 | ||
1165 | /* --- controls ---------------------------------------------- */ | |
1166 | case VIDIOC_QUERYCTRL: | |
1167 | { | |
1168 | struct v4l2_queryctrl *qc = arg; | |
1169 | int i; | |
1170 | ||
1171 | for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++) | |
1172 | if (qc->id && qc->id == vivi_qctrl[i].id) { | |
1173 | memcpy(qc, &(vivi_qctrl[i]), | |
1174 | sizeof(*qc)); | |
1175 | break; | |
1176 | } | |
1177 | ||
1178 | ret=-EINVAL; | |
1179 | break; | |
1180 | } | |
1181 | case VIDIOC_G_CTRL: | |
1182 | { | |
1183 | struct v4l2_control *ctrl = arg; | |
1184 | int i; | |
1185 | ||
1186 | for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++) | |
1187 | if (ctrl->id == vivi_qctrl[i].id) { | |
1188 | ctrl->value=qctl_regs[i]; | |
1189 | break; | |
1190 | } | |
1191 | ||
1192 | ret=-EINVAL; | |
1193 | break; | |
1194 | } | |
1195 | case VIDIOC_S_CTRL: | |
1196 | { | |
1197 | struct v4l2_control *ctrl = arg; | |
1198 | int i; | |
1199 | for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++) | |
1200 | if (ctrl->id == vivi_qctrl[i].id) { | |
1201 | if (ctrl->value < | |
1202 | vivi_qctrl[i].minimum | |
1203 | || ctrl->value > | |
1204 | vivi_qctrl[i].maximum) { | |
1205 | ret=-ERANGE; | |
1206 | break; | |
1207 | } | |
1208 | qctl_regs[i]=ctrl->value; | |
1209 | break; | |
1210 | } | |
1211 | ret=-EINVAL; | |
1212 | break; | |
1213 | } | |
1214 | default: | |
1215 | ret=v4l_compat_translate_ioctl(inode,file,cmd,arg,vivi_do_ioctl); | |
1216 | } | |
1217 | ||
1218 | if (debug) { | |
1219 | if (ret<0) { | |
1220 | v4l_print_ioctl("vivi(err)", cmd); | |
1221 | dprintk(1,"errcode=%d\n",ret); | |
1222 | } else if (_IOC_DIR(cmd) & _IOC_READ) | |
1223 | v4l_printk_ioctl_arg("vivi(r)",cmd, arg); | |
1224 | } | |
1225 | ||
1226 | return ret; | |
1227 | } | |
1228 | ||
1229 | static int vivi_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
1230 | { | |
1231 | return video_usercopy(inode, file, cmd, arg, vivi_do_ioctl); | |
1232 | } | |
1233 | ||
1234 | /* ------------------------------------------------------------------ | |
1235 | File operations for the device | |
1236 | ------------------------------------------------------------------*/ | |
1237 | ||
1238 | #define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8) | |
1239 | ||
1240 | static int vivi_open(struct inode *inode, struct file *file) | |
1241 | { | |
1242 | int minor = iminor(inode); | |
1243 | struct vivi_dev *h,*dev = NULL; | |
1244 | struct vivi_fh *fh; | |
1245 | struct list_head *list; | |
1246 | enum v4l2_buf_type type = 0; | |
1247 | int i; | |
1248 | ||
1249 | printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor); | |
1250 | ||
1251 | list_for_each(list,&vivi_devlist) { | |
1252 | h = list_entry(list, struct vivi_dev, vivi_devlist); | |
1253 | if (h->video_dev.minor == minor) { | |
1254 | dev = h; | |
1255 | type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1256 | } | |
1257 | } | |
1258 | if (NULL == dev) | |
1259 | return -ENODEV; | |
1260 | ||
1261 | ||
1262 | /* If more than one user, mutex should be added */ | |
1263 | dev->users++; | |
1264 | ||
1265 | dprintk(1,"open minor=%d type=%s users=%d\n", | |
1266 | minor,v4l2_type_names[type],dev->users); | |
1267 | ||
1268 | /* allocate + initialize per filehandle data */ | |
1269 | fh = kzalloc(sizeof(*fh),GFP_KERNEL); | |
1270 | if (NULL == fh) { | |
1271 | dev->users--; | |
1272 | return -ENOMEM; | |
1273 | } | |
1274 | ||
1275 | file->private_data = fh; | |
1276 | fh->dev = dev; | |
1277 | fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; | |
1278 | fh->fmt = &format; | |
1279 | fh->width = 640; | |
1280 | fh->height = 480; | |
1281 | ||
1282 | /* Put all controls at a sane state */ | |
1283 | for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++) | |
1284 | qctl_regs[i] =vivi_qctrl[i].default_value; | |
1285 | ||
1286 | dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n", | |
1287 | (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq); | |
1288 | dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued)); | |
1289 | dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active)); | |
1290 | ||
1291 | /* Resets frame counters */ | |
1292 | dev->h=0; | |
1293 | dev->m=0; | |
1294 | dev->s=0; | |
1295 | dev->us=0; | |
1296 | dev->jiffies=jiffies; | |
1297 | sprintf(dev->timestr,"%02d:%02d:%02d:%03d", | |
1298 | dev->h,dev->m,dev->s,(dev->us+500)/1000); | |
1299 | ||
1300 | videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops, | |
1301 | NULL, NULL, | |
1302 | fh->type, | |
1303 | V4L2_FIELD_INTERLACED, | |
1304 | sizeof(struct vivi_buffer),fh); | |
1305 | ||
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | static ssize_t | |
1310 | vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos) | |
1311 | { | |
1312 | struct vivi_fh *fh = file->private_data; | |
1313 | ||
1314 | if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) { | |
1315 | if (res_locked(fh->dev)) | |
1316 | return -EBUSY; | |
1317 | return videobuf_read_one(&fh->vb_vidq, data, count, ppos, | |
1318 | file->f_flags & O_NONBLOCK); | |
1319 | } | |
1320 | return 0; | |
1321 | } | |
1322 | ||
1323 | static unsigned int | |
1324 | vivi_poll(struct file *file, struct poll_table_struct *wait) | |
1325 | { | |
1326 | struct vivi_fh *fh = file->private_data; | |
1327 | struct vivi_buffer *buf; | |
1328 | ||
1329 | dprintk(1,"%s\n",__FUNCTION__); | |
1330 | ||
1331 | if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type) | |
1332 | return POLLERR; | |
1333 | ||
1334 | if (res_get(fh->dev,fh)) { | |
1335 | dprintk(1,"poll: mmap interface\n"); | |
1336 | /* streaming capture */ | |
1337 | if (list_empty(&fh->vb_vidq.stream)) | |
1338 | return POLLERR; | |
1339 | buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream); | |
1340 | } else { | |
1341 | dprintk(1,"poll: read() interface\n"); | |
1342 | /* read() capture */ | |
1343 | buf = (struct vivi_buffer*)fh->vb_vidq.read_buf; | |
1344 | if (NULL == buf) | |
1345 | return POLLERR; | |
1346 | } | |
1347 | poll_wait(file, &buf->vb.done, wait); | |
1348 | if (buf->vb.state == STATE_DONE || | |
1349 | buf->vb.state == STATE_ERROR) | |
1350 | return POLLIN|POLLRDNORM; | |
1351 | return 0; | |
1352 | } | |
1353 | ||
1354 | static int vivi_release(struct inode *inode, struct file *file) | |
1355 | { | |
1356 | struct vivi_fh *fh = file->private_data; | |
1357 | struct vivi_dev *dev = fh->dev; | |
1358 | struct vivi_dmaqueue *vidq = &dev->vidq; | |
1359 | ||
1360 | int minor = iminor(inode); | |
1361 | ||
1362 | vivi_stop_thread(vidq); | |
1363 | videobuf_mmap_free(&fh->vb_vidq); | |
1364 | ||
1365 | kfree (fh); | |
1366 | ||
1367 | dev->users--; | |
1368 | ||
1369 | printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users); | |
1370 | ||
1371 | return 0; | |
1372 | } | |
1373 | ||
1374 | static int | |
1375 | vivi_mmap(struct file *file, struct vm_area_struct * vma) | |
1376 | { | |
1377 | struct vivi_fh *fh = file->private_data; | |
1378 | int ret; | |
1379 | ||
1380 | dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma); | |
1381 | ||
1382 | ret=videobuf_mmap_mapper(&fh->vb_vidq, vma); | |
1383 | ||
1384 | dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n", | |
1385 | (unsigned long)vma->vm_start, | |
1386 | (unsigned long)vma->vm_end-(unsigned long)vma->vm_start, | |
1387 | ret); | |
1388 | ||
1389 | return ret; | |
1390 | } | |
1391 | ||
1392 | static struct file_operations vivi_fops = { | |
1393 | .owner = THIS_MODULE, | |
1394 | .open = vivi_open, | |
1395 | .release = vivi_release, | |
1396 | .read = vivi_read, | |
1397 | .poll = vivi_poll, | |
1398 | .ioctl = vivi_ioctl, | |
1399 | .mmap = vivi_mmap, | |
1400 | .llseek = no_llseek, | |
1401 | }; | |
1402 | ||
1403 | static struct video_device vivi = { | |
1404 | .name = "VTM Virtual Video Capture Board", | |
1405 | .type = VID_TYPE_CAPTURE, | |
1406 | .hardware = 0, | |
1407 | .fops = &vivi_fops, | |
1408 | .minor = -1, | |
1409 | // .release = video_device_release, | |
1410 | }; | |
1411 | /* ------------------------------------------------------------------ | |
1412 | Initialization and module stuff | |
1413 | ------------------------------------------------------------------*/ | |
1414 | ||
1415 | static int __init vivi_init(void) | |
1416 | { | |
1417 | int ret; | |
1418 | struct vivi_dev *dev; | |
1419 | ||
1420 | dev = kzalloc(sizeof(*dev),GFP_KERNEL); | |
1421 | if (NULL == dev) | |
1422 | return -ENOMEM; | |
1423 | list_add_tail(&dev->vivi_devlist,&vivi_devlist); | |
1424 | ||
1425 | /* init video dma queues */ | |
1426 | INIT_LIST_HEAD(&dev->vidq.active); | |
1427 | INIT_LIST_HEAD(&dev->vidq.queued); | |
1428 | ||
1429 | /* initialize locks */ | |
1430 | init_MUTEX(&dev->lock); | |
1431 | ||
1432 | dev->vidq.timeout.function = vivi_vid_timeout; | |
1433 | dev->vidq.timeout.data = (unsigned long)dev; | |
1434 | init_timer(&dev->vidq.timeout); | |
1435 | ||
1436 | ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr); | |
1437 | printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret); | |
1438 | return ret; | |
1439 | } | |
1440 | ||
1441 | static void __exit vivi_exit(void) | |
1442 | { | |
1443 | struct vivi_dev *h; | |
1444 | struct list_head *list; | |
1445 | ||
1446 | list_for_each(list,&vivi_devlist) { | |
1447 | h = list_entry(list, struct vivi_dev, vivi_devlist); | |
1448 | kfree (h); | |
1449 | } | |
1450 | video_unregister_device(&vivi); | |
1451 | } | |
1452 | ||
1453 | module_init(vivi_init); | |
1454 | module_exit(vivi_exit); |