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authorMauro Carvalho Chehab <mchehab@infradead.org>2006-03-10 10:40:10 -0500
committerMauro Carvalho Chehab <mchehab@infradead.org>2006-03-24 14:26:49 -0500
commit1e6dd65e17b8b584026334b16485365bab486422 (patch)
treeb870e052304bd14b8e49c6a5cae98bb4d33794a7 /drivers
parentc7b0ac0546985fc6361a8d92cf808d46da797677 (diff)
V4L/DVB (3518): Creates a virtual video device driver
The Virtual Video Device Driver (aka vivi) is a device that can be used to: 1) test core v4l functionalities; 2) be a prototype for newer development. Vivi were developed using the best practices for v4l driver. When loaded, it provides a video device that generates a standard color bar, with a timestamp placed at top left corner. Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/video/font.h407
-rw-r--r--drivers/media/video/vivi.c1453
2 files changed, 1860 insertions, 0 deletions
diff --git a/drivers/media/video/font.h b/drivers/media/video/font.h
new file mode 100644
index 000000000000..8b1fecc37599
--- /dev/null
+++ b/drivers/media/video/font.h
@@ -0,0 +1,407 @@
1static unsigned char rom8x16_bits[] = {
2/* Character 0 (0x30):
3 ht=16, width=8
4 +--------+
5 | |
6 | |
7 | ***** |
8 |** ** |
9 |** ** |
10 |** *** |
11 |** **** |
12 |**** ** |
13 |*** ** |
14 |** ** |
15 |** ** |
16 | ***** |
17 | |
18 | |
19 | |
20 | |
21 +--------+ */
220x00,
230x00,
240x7c,
250xc6,
260xc6,
270xce,
280xde,
290xf6,
300xe6,
310xc6,
320xc6,
330x7c,
340x00,
350x00,
360x00,
370x00,
38
39/* Character 1 (0x31):
40 ht=16, width=8
41 +--------+
42 | |
43 | |
44 | ** |
45 | **** |
46 | ** |
47 | ** |
48 | ** |
49 | ** |
50 | ** |
51 | ** |
52 | ** |
53 | ****** |
54 | |
55 | |
56 | |
57 | |
58 +--------+ */
590x00,
600x00,
610x18,
620x78,
630x18,
640x18,
650x18,
660x18,
670x18,
680x18,
690x18,
700x7e,
710x00,
720x00,
730x00,
740x00,
75
76/* Character 2 (0x32):
77 ht=16, width=8
78 +--------+
79 | |
80 | |
81 | ***** |
82 |** ** |
83 |** ** |
84 | ** |
85 | ** |
86 | ** |
87 | ** |
88 | ** |
89 |** ** |
90 |******* |
91 | |
92 | |
93 | |
94 | |
95 +--------+ */
960x00,
970x00,
980x7c,
990xc6,
1000xc6,
1010x06,
1020x0c,
1030x18,
1040x30,
1050x60,
1060xc6,
1070xfe,
1080x00,
1090x00,
1100x00,
1110x00,
112
113/* Character 3 (0x33):
114 ht=16, width=8
115 +--------+
116 | |
117 | |
118 | ***** |
119 |** ** |
120 | ** |
121 | ** |
122 | **** |
123 | ** |
124 | ** |
125 | ** |
126 |** ** |
127 | ***** |
128 | |
129 | |
130 | |
131 | |
132 +--------+ */
1330x00,
1340x00,
1350x7c,
1360xc6,
1370x06,
1380x06,
1390x3c,
1400x06,
1410x06,
1420x06,
1430xc6,
1440x7c,
1450x00,
1460x00,
1470x00,
1480x00,
149
150/* Character 4 (0x34):
151 ht=16, width=8
152 +--------+
153 | |
154 | |
155 | ** |
156 | *** |
157 | **** |
158 | ** ** |
159 |** ** |
160 |** ** |
161 |******* |
162 | ** |
163 | ** |
164 | **** |
165 | |
166 | |
167 | |
168 | |
169 +--------+ */
1700x00,
1710x00,
1720x0c,
1730x1c,
1740x3c,
1750x6c,
1760xcc,
1770xcc,
1780xfe,
1790x0c,
1800x0c,
1810x1e,
1820x00,
1830x00,
1840x00,
1850x00,
186
187/* Character 5 (0x35):
188 ht=16, width=8
189 +--------+
190 | |
191 | |
192 |******* |
193 |** |
194 |** |
195 |** |
196 |****** |
197 | ** |
198 | ** |
199 | ** |
200 |** ** |
201 | ***** |
202 | |
203 | |
204 | |
205 | |
206 +--------+ */
2070x00,
2080x00,
2090xfe,
2100xc0,
2110xc0,
2120xc0,
2130xfc,
2140x06,
2150x06,
2160x06,
2170xc6,
2180x7c,
2190x00,
2200x00,
2210x00,
2220x00,
223
224/* Character 6 (0x36):
225 ht=16, width=8
226 +--------+
227 | |
228 | |
229 | ***** |
230 |** ** |
231 |** |
232 |** |
233 |****** |
234 |** ** |
235 |** ** |
236 |** ** |
237 |** ** |
238 | ***** |
239 | |
240 | |
241 | |
242 | |
243 +--------+ */
2440x00,
2450x00,
2460x7c,
2470xc6,
2480xc0,
2490xc0,
2500xfc,
2510xc6,
2520xc6,
2530xc6,
2540xc6,
2550x7c,
2560x00,
2570x00,
2580x00,
2590x00,
260
261/* Character 7 (0x37):
262 ht=16, width=8
263 +--------+
264 | |
265 | |
266 |******* |
267 |** ** |
268 | ** |
269 | ** |
270 | ** |
271 | ** |
272 | ** |
273 | ** |
274 | ** |
275 | ** |
276 | |
277 | |
278 | |
279 | |
280 +--------+ */
2810x00,
2820x00,
2830xfe,
2840xc6,
2850x06,
2860x0c,
2870x18,
2880x30,
2890x30,
2900x30,
2910x30,
2920x30,
2930x00,
2940x00,
2950x00,
2960x00,
297
298/* Character 8 (0x38):
299 ht=16, width=8
300 +--------+
301 | |
302 | |
303 | ***** |
304 |** ** |
305 |** ** |
306 |** ** |
307 | ***** |
308 |** ** |
309 |** ** |
310 |** ** |
311 |** ** |
312 | ***** |
313 | |
314 | |
315 | |
316 | |
317 +--------+ */
3180x00,
3190x00,
3200x7c,
3210xc6,
3220xc6,
3230xc6,
3240x7c,
3250xc6,
3260xc6,
3270xc6,
3280xc6,
3290x7c,
3300x00,
3310x00,
3320x00,
3330x00,
334
335/* Character 9 (0x39):
336 ht=16, width=8
337 +--------+
338 | |
339 | |
340 | ***** |
341 |** ** |
342 |** ** |
343 |** ** |
344 |** ** |
345 | ****** |
346 | ** |
347 | ** |
348 |** ** |
349 | ***** |
350 | |
351 | |
352 | |
353 | |
354 +--------+ */
3550x00,
3560x00,
3570x7c,
3580xc6,
3590xc6,
3600xc6,
3610xc6,
3620x7e,
3630x06,
3640x06,
3650xc6,
3660x7c,
3670x00,
3680x00,
3690x00,
3700x00,
371/* Character : (0x3a):
372 ht=16, width=8
373 +--------+
374 | |
375 | |
376 | |
377 | |
378 | |
379 | ** |
380 | ** |
381 | |
382 | |
383 | ** |
384 | ** |
385 | |
386 | |
387 | |
388 | |
389 | |
390 +--------+ */
3910x00,
3920x00,
3930x00,
3940x00,
3950x00,
3960x0c,
3970x0c,
3980x00,
3990x00,
4000x0c,
4010x0c,
4020x00,
4030x00,
4040x00,
4050x00,
4060x00,
407};
diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c
new file mode 100644
index 000000000000..e2d941bae43e
--- /dev/null
+++ b/drivers/media/video/vivi.c
@@ -0,0 +1,1453 @@
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>
29#include <media/video-buf.h>
30#include <media/v4l2-common.h>
31#include <linux/kthread.h>
32#include <linux/highmem.h>
33
34/* Wake up at about 30 fps */
35#define WAKE_NUMERATOR 30
36#define WAKE_DENOMINATOR 1001
37#define BUFFER_TIMEOUT msecs_to_jiffies(500) /* 0.5 seconds */
38
39/* These timers are for 1 fps - used only for testing */
40//#define WAKE_DENOMINATOR 30 /* hack for testing purposes */
41//#define BUFFER_TIMEOUT msecs_to_jiffies(5000) /* 5 seconds */
42
43#include "font.h"
44
45#ifndef kzalloc
46#define kzalloc(size, flags) \
47({ \
48 void *__ret = kmalloc(size, flags); \
49 if (__ret) \
50 memset(__ret, 0, size); \
51 __ret; \
52})
53#endif
54
55MODULE_DESCRIPTION("Video Technology Magazine Virtual Video Capture Board");
56MODULE_AUTHOR("Ted Walther and John Sokol");
57MODULE_LICENSE("Dual BSD/GPL");
58
59#define VIVI_MAJOR_VERSION 0
60#define VIVI_MINOR_VERSION 4
61#define VIVI_RELEASE 0
62#define VIVI_VERSION KERNEL_VERSION(VIVI_MAJOR_VERSION, VIVI_MINOR_VERSION, VIVI_RELEASE)
63
64static int video_nr = -1; /* /dev/videoN, -1 for autodetect */
65module_param(video_nr, int, 0);
66
67static int debug = 0;
68module_param(debug, int, 0);
69
70static unsigned int vid_limit = 16;
71module_param(vid_limit,int,0644);
72MODULE_PARM_DESC(vid_limit,"capture memory limit in megabytes");
73
74/* supported controls */
75static struct v4l2_queryctrl vivi_qctrl[] = {
76 {
77 .id = V4L2_CID_AUDIO_VOLUME,
78 .name = "Volume",
79 .minimum = 0,
80 .maximum = 65535,
81 .step = 65535/100,
82 .default_value = 65535,
83 .flags = 0,
84 .type = V4L2_CTRL_TYPE_INTEGER,
85 },{
86 .id = V4L2_CID_BRIGHTNESS,
87 .type = V4L2_CTRL_TYPE_INTEGER,
88 .name = "Brightness",
89 .minimum = 0,
90 .maximum = 255,
91 .step = 1,
92 .default_value = 127,
93 .flags = 0,
94 }, {
95 .id = V4L2_CID_CONTRAST,
96 .type = V4L2_CTRL_TYPE_INTEGER,
97 .name = "Contrast",
98 .minimum = 0,
99 .maximum = 255,
100 .step = 0x1,
101 .default_value = 0x10,
102 .flags = 0,
103 }, {
104 .id = V4L2_CID_SATURATION,
105 .type = V4L2_CTRL_TYPE_INTEGER,
106 .name = "Saturation",
107 .minimum = 0,
108 .maximum = 255,
109 .step = 0x1,
110 .default_value = 127,
111 .flags = 0,
112 }, {
113 .id = V4L2_CID_HUE,
114 .type = V4L2_CTRL_TYPE_INTEGER,
115 .name = "Hue",
116 .minimum = -128,
117 .maximum = 127,
118 .step = 0x1,
119 .default_value = 0,
120 .flags = 0,
121 }
122};
123
124static int qctl_regs[ARRAY_SIZE(vivi_qctrl)];
125
126#define dprintk(level,fmt, arg...) \
127 do { \
128 if (debug >= (level)) \
129 printk(KERN_DEBUG "vivi: " fmt , ## arg); \
130 } while (0)
131
132/* ------------------------------------------------------------------
133 Basic structures
134 ------------------------------------------------------------------*/
135
136struct vivi_fmt {
137 char *name;
138 u32 fourcc; /* v4l2 format id */
139 int depth;
140};
141
142static struct vivi_fmt format = {
143 .name = "4:2:2, packed, YUYV",
144 .fourcc = V4L2_PIX_FMT_YUYV,
145 .depth = 16,
146};
147
148struct sg_to_addr {
149 int pos;
150 struct scatterlist *sg;
151};
152
153/* buffer for one video frame */
154struct vivi_buffer {
155 /* common v4l buffer stuff -- must be first */
156 struct videobuf_buffer vb;
157
158 struct vivi_fmt *fmt;
159
160 struct sg_to_addr *to_addr;
161};
162
163struct vivi_dmaqueue {
164 struct list_head active;
165 struct list_head queued;
166 struct timer_list timeout;
167
168 /* thread for generating video stream*/
169 struct task_struct *kthread;
170 wait_queue_head_t wq;
171 /* Counters to control fps rate */
172 int frame;
173 int ini_jiffies;
174};
175
176static LIST_HEAD(vivi_devlist);
177
178struct vivi_dev {
179 struct list_head vivi_devlist;
180
181 struct semaphore lock;
182
183 int users;
184
185 /* various device info */
186 unsigned int resources;
187 struct video_device video_dev;
188
189 struct vivi_dmaqueue vidq;
190
191 /* Several counters */
192 int h,m,s,us,jiffies;
193 char timestr[13];
194};
195
196struct vivi_fh {
197 struct vivi_dev *dev;
198
199 /* video capture */
200 struct vivi_fmt *fmt;
201 unsigned int width,height;
202 struct videobuf_queue vb_vidq;
203
204 enum v4l2_buf_type type;
205};
206
207/* ------------------------------------------------------------------
208 DMA and thread functions
209 ------------------------------------------------------------------*/
210
211/* Bars and Colors should match positions */
212
213enum colors {
214 WHITE,
215 AMBAR,
216 CYAN,
217 GREEN,
218 MAGENTA,
219 RED,
220 BLUE
221};
222
223static u8 bars[8][3] = {
224 /* R G B */
225 {204,204,204}, /* white */
226 {208,208, 0}, /* ambar */
227 { 0,206,206}, /* cyan */
228 { 0,239, 0}, /* green */
229 {239, 0,239}, /* magenta */
230 {205, 0, 0}, /* red */
231 { 0, 0,255}, /* blue */
232 { 0, 0, 0}
233};
234
235#define TO_Y(r,g,b) (((16829*r +33039*g +6416*b + 32768)>>16)+16)
236/* RGB to V(Cr) Color transform */
237#define TO_V(r,g,b) (((28784*r -24103*g -4681*b + 32768)>>16)+128)
238/* RGB to U(Cb) Color transform */
239#define TO_U(r,g,b) (((-9714*r -19070*g +28784*b + 32768)>>16)+128)
240
241#define TSTAMP_MIN_Y 24
242#define TSTAMP_MAX_Y TSTAMP_MIN_Y+15
243#define TSTAMP_MIN_X 64
244
245void prep_to_addr(struct sg_to_addr to_addr[],struct videobuf_buffer *vb)
246{
247 int i, pos=0;
248
249 for (i=0;i<vb->dma.nr_pages;i++) {
250 to_addr[i].sg=&vb->dma.sglist[i];
251 to_addr[i].pos=pos;
252 pos += vb->dma.sglist[i].length;
253 }
254}
255
256inline int get_addr_pos(int pos, int pages, struct sg_to_addr to_addr[])
257{
258 int p1=0,p2=pages-1,p3=pages/2;
259
260 /* Sanity test */
261 BUG_ON (pos>=to_addr[p2].pos+to_addr[p2].sg->length);
262
263 while (p1+1<p2) {
264 if (pos < to_addr[p3].pos) {
265 p2=p3;
266 } else {
267 p1=p3;
268 }
269 p3=(p1+p2)/2;
270 }
271 if (pos >= to_addr[p2].pos)
272 p1=p2;
273
274 return (p1);
275}
276
277void gen_line(struct sg_to_addr to_addr[],int inipos,int pages,int wmax,
278 int hmax, int line, char *timestr)
279{
280 int w,i,j,pos=inipos,pgpos,oldpg,y;
281 char *p,*s,*basep;
282 struct page *pg;
283 u8 chr,r,g,b,color;
284
285 /* Get first addr pointed to pixel position */
286 oldpg=get_addr_pos(pos,pages,to_addr);
287 pg=pfn_to_page(to_addr[oldpg].sg->dma_address >> PAGE_SHIFT);
288 basep = kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[oldpg].sg->offset;
289
290 /* We will just duplicate the second pixel at the packet */
291 wmax/=2;
292
293 /* Generate a standard color bar pattern */
294 for (w=0;w<wmax;w++) {
295 r=bars[w*7/wmax][0];
296 g=bars[w*7/wmax][1];
297 b=bars[w*7/wmax][2];
298
299 for (color=0;color<4;color++) {
300 pgpos=get_addr_pos(pos,pages,to_addr);
301 if (pgpos!=oldpg) {
302 pg=pfn_to_page(to_addr[pgpos].sg->dma_address >> PAGE_SHIFT);
303 kunmap_atomic(basep, KM_BOUNCE_READ);
304 basep= kmap_atomic(pg, KM_BOUNCE_READ)+to_addr[pgpos].sg->offset;
305 oldpg=pgpos;
306 }
307 p=basep+pos-to_addr[pgpos].pos;
308
309 switch (color) {
310 case 0:
311 case 2:
312 *p=TO_Y(r,g,b); /* Luminance */
313 break;
314 case 1:
315 *p=TO_U(r,g,b); /* Cb */
316 break;
317 case 3:
318 *p=TO_V(r,g,b); /* Cr */
319 break;
320 }
321 pos++;
322 }
323 }
324
325 /* Checks if it is possible to show timestamp */
326 if (TSTAMP_MAX_Y>=hmax)
327 goto end;
328 if (TSTAMP_MIN_X+strlen(timestr)>=wmax)
329 goto end;
330
331 /* Print stream time */
332 if (line>=TSTAMP_MIN_Y && line<=TSTAMP_MAX_Y) {
333 j=TSTAMP_MIN_X;
334 for (s=timestr;*s;s++) {
335 chr=rom8x16_bits[(*s-0x30)*16+line-TSTAMP_MIN_Y];
336 for (i=0;i<7;i++) {
337 if (chr&1<<(7-i)) { /* Font color*/
338 r=bars[BLUE][0];
339 g=bars[BLUE][1];
340 b=bars[BLUE][2];
341 r=g=b=0;
342 g=198;
343 } else { /* Background color */
344 r=bars[WHITE][0];
345 g=bars[WHITE][1];
346 b=bars[WHITE][2];
347 r=g=b=0;
348 }
349
350 pos=inipos+j*2;
351 for (color=0;color<4;color++) {
352 pgpos=get_addr_pos(pos,pages,to_addr);
353 if (pgpos!=oldpg) {
354 pg=pfn_to_page(to_addr[pgpos].
355 sg->dma_address
356 >> PAGE_SHIFT);
357 kunmap_atomic(basep,
358 KM_BOUNCE_READ);
359 basep= kmap_atomic(pg,
360 KM_BOUNCE_READ)+
361 to_addr[pgpos].sg->offset;
362 oldpg=pgpos;
363 }
364 p=basep+pos-to_addr[pgpos].pos;
365
366 y=TO_Y(r,g,b);
367
368 switch (color) {
369 case 0:
370 case 2:
371 *p=TO_Y(r,g,b); /* Luminance */
372 break;
373 case 1:
374 *p=TO_U(r,g,b); /* Cb */
375 break;
376 case 3:
377 *p=TO_V(r,g,b); /* Cr */
378 break;
379 }
380 pos++;
381 }
382 j++;
383 }
384 }
385 }
386
387
388end:
389 kunmap_atomic(basep, KM_BOUNCE_READ);
390}
391static void vivi_fillbuff(struct vivi_dev *dev,struct vivi_buffer *buf)
392{
393 int h,pos=0;
394 int hmax = buf->vb.height;
395 int wmax = buf->vb.width;
396 struct videobuf_buffer *vb=&buf->vb;
397 struct sg_to_addr *to_addr=buf->to_addr;
398 struct timeval ts;
399
400 /* Test if DMA mapping is ready */
401 if (!vb->dma.sglist[0].dma_address)
402 return;
403
404 prep_to_addr(to_addr,vb);
405
406 /* Check if there is enough memory */
407 BUG_ON(buf->vb.dma.nr_pages << PAGE_SHIFT < (buf->vb.width*buf->vb.height)*2);
408
409 for (h=0;h<hmax;h++) {
410 gen_line(to_addr,pos,vb->dma.nr_pages,wmax,hmax,h,dev->timestr);
411 pos += wmax*2;
412 }
413
414 /* Updates stream time */
415
416 dev->us+=jiffies_to_usecs(jiffies-dev->jiffies);
417 dev->jiffies=jiffies;
418 if (dev->us>=1000000) {
419 dev->us-=1000000;
420 dev->s++;
421 if (dev->s>=60) {
422 dev->s-=60;
423 dev->m++;
424 if (dev->m>60) {
425 dev->m-=60;
426 dev->h++;
427 if (dev->h>24)
428 dev->h-=24;
429 }
430 }
431 }
432 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
433 dev->h,dev->m,dev->s,(dev->us+500)/1000);
434
435 dprintk(2,"vivifill at %s: Buffer 0x%08lx size= %d\n",dev->timestr,
436 (unsigned long)buf->vb.dma.vmalloc,pos);
437
438 /* Advice that buffer was filled */
439 buf->vb.state = STATE_DONE;
440 buf->vb.field_count++;
441 do_gettimeofday(&ts);
442 buf->vb.ts = ts;
443
444 list_del(&buf->vb.queue);
445 wake_up(&buf->vb.done);
446}
447
448static int restart_video_queue(struct vivi_dmaqueue *dma_q);
449
450static void vivi_thread_tick(struct vivi_dmaqueue *dma_q)
451{
452 struct vivi_buffer *buf;
453 struct vivi_dev *dev= container_of(dma_q,struct vivi_dev,vidq);
454
455 int bc;
456
457 /* Announces videobuf that all went ok */
458 for (bc = 0;; bc++) {
459 if (list_empty(&dma_q->active)) {
460 dprintk(1,"No active queue to serve\n");
461 break;
462 }
463
464 buf = list_entry(dma_q->active.next,
465 struct vivi_buffer, vb.queue);
466
467 /* Nobody is waiting something to be done, just return */
468 if (!waitqueue_active(&buf->vb.done)) {
469 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
470 return;
471 }
472
473 do_gettimeofday(&buf->vb.ts);
474 dprintk(2,"[%p/%d] wakeup\n",buf,buf->vb.i);
475
476 /* Fill buffer */
477 vivi_fillbuff(dev,buf);
478 }
479 if (list_empty(&dma_q->active)) {
480 del_timer(&dma_q->timeout);
481 } else {
482 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
483 }
484 if (bc != 1)
485 dprintk(1,"%s: %d buffers handled (should be 1)\n",__FUNCTION__,bc);
486}
487
488void vivi_sleep(struct vivi_dmaqueue *dma_q)
489{
490 int timeout;
491 DECLARE_WAITQUEUE(wait, current);
492
493 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
494
495 add_wait_queue(&dma_q->wq, &wait);
496 if (!kthread_should_stop()) {
497 dma_q->frame++;
498
499 /* Calculate time to wake up */
500 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
501
502 if (timeout <= 0) {
503 int old=dma_q->frame;
504 dma_q->frame=(jiffies_to_msecs(jiffies-dma_q->ini_jiffies)*WAKE_DENOMINATOR)/(WAKE_NUMERATOR*1000)+1;
505
506 timeout=dma_q->ini_jiffies+msecs_to_jiffies((dma_q->frame*WAKE_NUMERATOR*1000)/WAKE_DENOMINATOR)-jiffies;
507
508 dprintk(1,"underrun, losed %d frames. "
509 "Now, frame is %d. Waking on %d jiffies\n",
510 dma_q->frame-old,dma_q->frame,timeout);
511 } else
512 dprintk(1,"will sleep for %i jiffies\n",timeout);
513
514 vivi_thread_tick(dma_q);
515
516 schedule_timeout_interruptible (timeout);
517 }
518
519 remove_wait_queue(&dma_q->wq, &wait);
520 try_to_freeze();
521}
522
523int vivi_thread(void *data)
524{
525 struct vivi_dmaqueue *dma_q=data;
526
527 dprintk(1,"thread started\n");
528
529 for (;;) {
530 vivi_sleep(dma_q);
531
532 if (kthread_should_stop())
533 break;
534 }
535 dprintk(1, "thread: exit\n");
536 return 0;
537}
538
539int vivi_start_thread(struct vivi_dmaqueue *dma_q)
540{
541 dma_q->frame=0;
542 dma_q->ini_jiffies=jiffies;
543
544 dprintk(1,"%s\n",__FUNCTION__);
545 init_waitqueue_head(&dma_q->wq);
546
547 dma_q->kthread = kthread_run(vivi_thread, dma_q, "vivi");
548
549 if (dma_q->kthread == NULL) {
550 printk(KERN_ERR "vivi: kernel_thread() failed\n");
551 return -EINVAL;
552 }
553 dprintk(1,"returning from %s\n",__FUNCTION__);
554 return 0;
555}
556
557void vivi_stop_thread(struct vivi_dmaqueue *dma_q)
558{
559 dprintk(1,"%s\n",__FUNCTION__);
560 /* shutdown control thread */
561 if (dma_q->kthread) {
562 kthread_stop(dma_q->kthread);
563 dma_q->kthread=NULL;
564 }
565}
566
567static int restart_video_queue(struct vivi_dmaqueue *dma_q)
568{
569 struct vivi_buffer *buf, *prev;
570 struct list_head *item;
571
572 dprintk(1,"%s dma_q=0x%08lx\n",__FUNCTION__,(unsigned long)dma_q);
573
574 if (!list_empty(&dma_q->active)) {
575 buf = list_entry(dma_q->active.next, struct vivi_buffer, vb.queue);
576 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
577 buf, buf->vb.i);
578
579 dprintk(1,"Restarting video dma\n");
580 vivi_stop_thread(dma_q);
581// vivi_start_thread(dma_q);
582
583 /* cancel all outstanding capture / vbi requests */
584 list_for_each(item,&dma_q->active) {
585 buf = list_entry(item, struct vivi_buffer, vb.queue);
586
587 list_del(&buf->vb.queue);
588 buf->vb.state = STATE_ERROR;
589 wake_up(&buf->vb.done);
590 }
591 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
592
593 return 0;
594 }
595
596 prev = NULL;
597 for (;;) {
598 if (list_empty(&dma_q->queued))
599 return 0;
600 buf = list_entry(dma_q->queued.next, struct vivi_buffer, vb.queue);
601 if (NULL == prev) {
602 list_del(&buf->vb.queue);
603 list_add_tail(&buf->vb.queue,&dma_q->active);
604
605 dprintk(1,"Restarting video dma\n");
606 vivi_stop_thread(dma_q);
607 vivi_start_thread(dma_q);
608
609 buf->vb.state = STATE_ACTIVE;
610 mod_timer(&dma_q->timeout, jiffies+BUFFER_TIMEOUT);
611 dprintk(2,"[%p/%d] restart_queue - first active\n",
612 buf,buf->vb.i);
613
614 } else if (prev->vb.width == buf->vb.width &&
615 prev->vb.height == buf->vb.height &&
616 prev->fmt == buf->fmt) {
617 list_del(&buf->vb.queue);
618 list_add_tail(&buf->vb.queue,&dma_q->active);
619 buf->vb.state = STATE_ACTIVE;
620 dprintk(2,"[%p/%d] restart_queue - move to active\n",
621 buf,buf->vb.i);
622 } else {
623 return 0;
624 }
625 prev = buf;
626 }
627}
628
629static void vivi_vid_timeout(unsigned long data)
630{
631 struct vivi_dev *dev = (struct vivi_dev*)data;
632 struct vivi_dmaqueue *vidq = &dev->vidq;
633 struct vivi_buffer *buf;
634
635 while (!list_empty(&vidq->active)) {
636 buf = list_entry(vidq->active.next, struct vivi_buffer, vb.queue);
637 list_del(&buf->vb.queue);
638 buf->vb.state = STATE_ERROR;
639 wake_up(&buf->vb.done);
640 printk("vivi/0: [%p/%d] timeout\n", buf, buf->vb.i);
641 }
642
643 restart_video_queue(vidq);
644}
645
646/* ------------------------------------------------------------------
647 Videobuf operations
648 ------------------------------------------------------------------*/
649static int
650buffer_setup(struct videobuf_queue *vq, unsigned int *count, unsigned int *size)
651{
652 struct vivi_fh *fh = vq->priv_data;
653
654 *size = fh->width*fh->height*2;
655
656 if (0 == *count)
657 *count = 32;
658 while (*size * *count > vid_limit * 1024 * 1024)
659 (*count)--;
660 return 0;
661}
662
663void
664free_buffer(struct videobuf_queue *vq, struct vivi_buffer *buf)
665{
666 dprintk(1,"%s\n",__FUNCTION__);
667
668 if (in_interrupt())
669 BUG();
670
671 /*FIXME: Maybe a spinlock is required here */
672 kfree(buf->to_addr);
673 buf->to_addr=NULL;
674
675 videobuf_waiton(&buf->vb,0,0);
676 videobuf_dma_unmap(vq, &buf->vb.dma);
677 videobuf_dma_free(&buf->vb.dma);
678 buf->vb.state = STATE_NEEDS_INIT;
679}
680
681#define norm_maxw() 1024
682#define norm_maxh() 768
683static int
684buffer_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
685 enum v4l2_field field)
686{
687 struct vivi_fh *fh = vq->priv_data;
688 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
689 int rc, init_buffer = 0;
690
691// dprintk(1,"%s, field=%d\n",__FUNCTION__,field);
692
693 BUG_ON(NULL == fh->fmt);
694 if (fh->width < 48 || fh->width > norm_maxw() ||
695 fh->height < 32 || fh->height > norm_maxh())
696 return -EINVAL;
697 buf->vb.size = fh->width*fh->height*2;
698 if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
699 return -EINVAL;
700
701 if (buf->fmt != fh->fmt ||
702 buf->vb.width != fh->width ||
703 buf->vb.height != fh->height ||
704 buf->vb.field != field) {
705 buf->fmt = fh->fmt;
706 buf->vb.width = fh->width;
707 buf->vb.height = fh->height;
708 buf->vb.field = field;
709 init_buffer = 1;
710 }
711
712 if (STATE_NEEDS_INIT == buf->vb.state) {
713 if (0 != (rc = videobuf_iolock(vq,&buf->vb,NULL)))
714 goto fail;
715 }
716
717 buf->vb.state = STATE_PREPARED;
718
719 if (NULL == (buf->to_addr = kmalloc(sizeof(*buf->to_addr) * vb->dma.nr_pages,GFP_KERNEL))) {
720 rc=-ENOMEM;
721 goto fail;
722 }
723
724 return 0;
725
726fail:
727 free_buffer(vq,buf);
728 return rc;
729}
730
731static void
732buffer_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
733{
734 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
735 struct vivi_fh *fh = vq->priv_data;
736 struct vivi_dev *dev = fh->dev;
737 struct vivi_dmaqueue *vidq = &dev->vidq;
738 struct vivi_buffer *prev;
739
740 if (!list_empty(&vidq->queued)) {
741 dprintk(1,"adding vb queue=0x%08lx\n",(unsigned long)&buf->vb.queue);
742 list_add_tail(&buf->vb.queue,&vidq->queued);
743 buf->vb.state = STATE_QUEUED;
744 dprintk(2,"[%p/%d] buffer_queue - append to queued\n",
745 buf, buf->vb.i);
746 } else if (list_empty(&vidq->active)) {
747 list_add_tail(&buf->vb.queue,&vidq->active);
748
749 buf->vb.state = STATE_ACTIVE;
750 mod_timer(&vidq->timeout, jiffies+BUFFER_TIMEOUT);
751 dprintk(2,"[%p/%d] buffer_queue - first active\n",
752 buf, buf->vb.i);
753
754 vivi_start_thread(vidq);
755 } else {
756 prev = list_entry(vidq->active.prev, struct vivi_buffer, vb.queue);
757 if (prev->vb.width == buf->vb.width &&
758 prev->vb.height == buf->vb.height &&
759 prev->fmt == buf->fmt) {
760 list_add_tail(&buf->vb.queue,&vidq->active);
761 buf->vb.state = STATE_ACTIVE;
762 dprintk(2,"[%p/%d] buffer_queue - append to active\n",
763 buf, buf->vb.i);
764
765 } else {
766 list_add_tail(&buf->vb.queue,&vidq->queued);
767 buf->vb.state = STATE_QUEUED;
768 dprintk(2,"[%p/%d] buffer_queue - first queued\n",
769 buf, buf->vb.i);
770 }
771 }
772}
773
774static void buffer_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
775{
776 struct vivi_buffer *buf = container_of(vb,struct vivi_buffer,vb);
777 struct vivi_fh *fh = vq->priv_data;
778 struct vivi_dev *dev = (struct vivi_dev*)fh->dev;
779 struct vivi_dmaqueue *vidq = &dev->vidq;
780
781 dprintk(1,"%s\n",__FUNCTION__);
782
783 vivi_stop_thread(vidq);
784
785 free_buffer(vq,buf);
786}
787
788int vivi_map_sg (void *dev, struct scatterlist *sg, int nents,
789 int direction)
790{
791 int i;
792
793 dprintk(1,"%s, number of pages=%d\n",__FUNCTION__,nents);
794 BUG_ON(direction == DMA_NONE);
795
796 for (i = 0; i < nents; i++ ) {
797 BUG_ON(!sg[i].page);
798
799 sg[i].dma_address = page_to_phys(sg[i].page) + sg[i].offset;
800 }
801
802 return nents;
803}
804
805int vivi_unmap_sg(void *dev,struct scatterlist *sglist,int nr_pages,
806 int direction)
807{
808 dprintk(1,"%s\n",__FUNCTION__);
809 return 0;
810}
811
812int vivi_dma_sync_sg(void *dev,struct scatterlist *sglist,int nr_pages,
813 int direction)
814{
815// dprintk(1,"%s\n",__FUNCTION__);
816
817// flush_write_buffers();
818 return 0;
819}
820
821static struct videobuf_queue_ops vivi_video_qops = {
822 .buf_setup = buffer_setup,
823 .buf_prepare = buffer_prepare,
824 .buf_queue = buffer_queue,
825 .buf_release = buffer_release,
826
827 /* Non-pci handling routines */
828 .vb_map_sg = vivi_map_sg,
829 .vb_dma_sync_sg = vivi_dma_sync_sg,
830 .vb_unmap_sg = vivi_unmap_sg,
831};
832
833/* ------------------------------------------------------------------
834 IOCTL handling
835 ------------------------------------------------------------------*/
836
837static int vivi_try_fmt(struct vivi_dev *dev, struct vivi_fh *fh,
838 struct v4l2_format *f)
839{
840 struct vivi_fmt *fmt;
841 enum v4l2_field field;
842 unsigned int maxw, maxh;
843
844 if (format.fourcc != f->fmt.pix.pixelformat) {
845 dprintk(1,"Fourcc format invalid.\n");
846 return -EINVAL;
847 }
848 fmt=&format;
849
850 field = f->fmt.pix.field;
851
852 if (field == V4L2_FIELD_ANY) {
853// field=V4L2_FIELD_INTERLACED;
854 field=V4L2_FIELD_SEQ_TB;
855 } else if (V4L2_FIELD_INTERLACED != field) {
856 dprintk(1,"Field type invalid.\n");
857 return -EINVAL;
858 }
859
860 maxw = norm_maxw();
861 maxh = norm_maxh();
862
863 f->fmt.pix.field = field;
864 if (f->fmt.pix.height < 32)
865 f->fmt.pix.height = 32;
866 if (f->fmt.pix.height > maxh)
867 f->fmt.pix.height = maxh;
868 if (f->fmt.pix.width < 48)
869 f->fmt.pix.width = 48;
870 if (f->fmt.pix.width > maxw)
871 f->fmt.pix.width = maxw;
872 f->fmt.pix.width &= ~0x03;
873 f->fmt.pix.bytesperline =
874 (f->fmt.pix.width * fmt->depth) >> 3;
875 f->fmt.pix.sizeimage =
876 f->fmt.pix.height * f->fmt.pix.bytesperline;
877
878 return 0;
879}
880
881static int res_get(struct vivi_dev *dev, struct vivi_fh *fh)
882{
883 /* is it free? */
884 down(&dev->lock);
885 if (dev->resources) {
886 /* no, someone else uses it */
887 up(&dev->lock);
888 return 0;
889 }
890 /* it's free, grab it */
891 dev->resources =1;
892 dprintk(1,"res: get\n");
893 up(&dev->lock);
894 return 1;
895}
896
897static inline int res_locked(struct vivi_dev *dev)
898{
899 return (dev->resources);
900}
901
902static void res_free(struct vivi_dev *dev, struct vivi_fh *fh)
903{
904 down(&dev->lock);
905 dev->resources = 0;
906 dprintk(1,"res: put\n");
907 up(&dev->lock);
908}
909
910static int vivi_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg)
911{
912 struct vivi_fh *fh = file->private_data;
913 struct vivi_dev *dev = fh->dev;
914 int ret=0;
915
916 if (debug) {
917 if (_IOC_DIR(cmd) & _IOC_WRITE)
918 v4l_printk_ioctl_arg("vivi(w)",cmd, arg);
919 else if (!_IOC_DIR(cmd) & _IOC_READ) {
920 v4l_print_ioctl("vivi", cmd);
921 }
922 }
923
924 switch(cmd) {
925 /* --- capabilities ------------------------------------------ */
926 case VIDIOC_QUERYCAP:
927 {
928 struct v4l2_capability *cap = (struct v4l2_capability*)arg;
929
930 memset(cap, 0, sizeof(*cap));
931
932 strcpy(cap->driver, "vivi");
933 strcpy(cap->card, "vivi");
934 cap->version = VIVI_VERSION;
935 cap->capabilities =
936 V4L2_CAP_VIDEO_CAPTURE |
937 V4L2_CAP_STREAMING |
938 V4L2_CAP_READWRITE;
939 break;
940 }
941 /* --- capture ioctls ---------------------------------------- */
942 case VIDIOC_ENUM_FMT:
943 {
944 struct v4l2_fmtdesc *f = arg;
945 enum v4l2_buf_type type;
946 unsigned int index;
947
948 index = f->index;
949 type = f->type;
950
951 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
952 ret=-EINVAL;
953 break;
954 }
955
956 switch (type) {
957 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
958 if (index > 0){
959 ret=-EINVAL;
960 break;
961 }
962 memset(f,0,sizeof(*f));
963
964 f->index = index;
965 f->type = type;
966 strlcpy(f->description,format.name,sizeof(f->description));
967 f->pixelformat = format.fourcc;
968 break;
969 default:
970 ret=-EINVAL;
971 }
972 break;
973 }
974 case VIDIOC_G_FMT:
975 {
976 struct v4l2_format *f = (struct v4l2_format *)arg;
977
978 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
979 ret=-EINVAL;
980 break;
981 }
982
983 memset(&f->fmt.pix,0,sizeof(f->fmt.pix));
984 f->fmt.pix.width = fh->width;
985 f->fmt.pix.height = fh->height;
986 f->fmt.pix.field = fh->vb_vidq.field;
987 f->fmt.pix.pixelformat = fh->fmt->fourcc;
988 f->fmt.pix.bytesperline =
989 (f->fmt.pix.width * fh->fmt->depth) >> 3;
990 f->fmt.pix.sizeimage =
991 f->fmt.pix.height * f->fmt.pix.bytesperline;
992 break;
993 }
994 case VIDIOC_S_FMT:
995 {
996 struct v4l2_format *f = arg;
997
998 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
999 dprintk(1,"Only capture supported.\n");
1000 ret=-EINVAL;
1001 break;
1002 }
1003
1004 ret = vivi_try_fmt(dev,fh,f);
1005 if (ret < 0)
1006 break;
1007
1008 fh->fmt = &format;
1009 fh->width = f->fmt.pix.width;
1010 fh->height = f->fmt.pix.height;
1011 fh->vb_vidq.field = f->fmt.pix.field;
1012 fh->type = f->type;
1013
1014 break;
1015 }
1016 case VIDIOC_TRY_FMT:
1017 {
1018 struct v4l2_format *f = arg;
1019 if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1020 ret=-EINVAL;
1021 break;
1022 }
1023
1024 ret=vivi_try_fmt(dev,fh,f);
1025 break;
1026 }
1027 case VIDIOC_REQBUFS:
1028 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1029 ret=-EINVAL;
1030 break;
1031 }
1032 ret=videobuf_reqbufs(&fh->vb_vidq, arg);
1033 break;
1034 case VIDIOC_QUERYBUF:
1035 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1036 ret=-EINVAL;
1037 break;
1038 }
1039 ret=videobuf_querybuf(&fh->vb_vidq, arg);
1040 break;
1041 case VIDIOC_QBUF:
1042 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1043 ret=-EINVAL;
1044 break;
1045 }
1046 ret=videobuf_qbuf(&fh->vb_vidq, arg);
1047 break;
1048 case VIDIOC_DQBUF:
1049 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1050 ret=-EINVAL;
1051 break;
1052 }
1053 ret=videobuf_dqbuf(&fh->vb_vidq, arg,
1054 file->f_flags & O_NONBLOCK);
1055 break;
1056#ifdef HAVE_V4L1
1057 /* --- streaming capture ------------------------------------- */
1058 case VIDIOCGMBUF:
1059 {
1060 struct video_mbuf *mbuf = arg;
1061 struct videobuf_queue *q=&fh->vb_vidq;
1062 struct v4l2_requestbuffers req;
1063 unsigned int i;
1064
1065 memset(&req,0,sizeof(req));
1066 req.type = q->type;
1067 req.count = 8;
1068 req.memory = V4L2_MEMORY_MMAP;
1069 ret = videobuf_reqbufs(q,&req);
1070 if (ret < 0)
1071 break;
1072 memset(mbuf,0,sizeof(*mbuf));
1073 mbuf->frames = req.count;
1074 mbuf->size = 0;
1075 for (i = 0; i < mbuf->frames; i++) {
1076 mbuf->offsets[i] = q->bufs[i]->boff;
1077 mbuf->size += q->bufs[i]->bsize;
1078 }
1079 break;
1080 }
1081#endif
1082 case VIDIOC_STREAMON:
1083 {
1084 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1085 return -EINVAL;
1086 if (!res_get(dev,fh))
1087 return -EBUSY;
1088 ret=videobuf_streamon(&fh->vb_vidq);
1089 break;
1090 }
1091 case VIDIOC_STREAMOFF:
1092 {
1093 if (fh->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1094 ret=-EINVAL;
1095 break;
1096 }
1097 ret = videobuf_streamoff(&fh->vb_vidq);
1098 if (ret < 0)
1099 break;
1100 res_free(dev,fh);
1101 break;
1102 }
1103 /* ---------- tv norms ---------- */
1104 case VIDIOC_ENUMSTD:
1105 {
1106 struct v4l2_standard *e = arg;
1107
1108 if (e->index>0) {
1109 ret=-EINVAL;
1110 break;
1111 }
1112 ret = v4l2_video_std_construct(e, V4L2_STD_NTSC_M, "NTSC-M");
1113
1114 /* Allows vivi to use different fps from video std */
1115 e->frameperiod.numerator = WAKE_NUMERATOR;
1116 e->frameperiod.denominator = WAKE_DENOMINATOR;
1117
1118 break;
1119 }
1120 case VIDIOC_G_STD:
1121 {
1122 v4l2_std_id *id = arg;
1123
1124 *id = V4L2_STD_NTSC_M;
1125 break;
1126 }
1127 case VIDIOC_S_STD:
1128 {
1129 break;
1130 }
1131 /* ------ input switching ---------- */
1132 case VIDIOC_ENUMINPUT:
1133 { /* only one input in this sample driver */
1134 struct v4l2_input *inp = arg;
1135
1136 if (inp->index != 0) {
1137 ret=-EINVAL;
1138 break;
1139 }
1140 memset(inp, 0, sizeof(*inp));
1141
1142 inp->index = 0;
1143 inp->type = V4L2_INPUT_TYPE_CAMERA;
1144 inp->std = V4L2_STD_NTSC_M;
1145 strcpy(inp->name,"Camera");
1146 break;
1147 }
1148 case VIDIOC_G_INPUT:
1149 {
1150 unsigned int *i = arg;
1151
1152 *i = 0;
1153 break;
1154 }
1155 case VIDIOC_S_INPUT:
1156 {
1157 unsigned int *i = arg;
1158
1159 if (*i > 0)
1160 ret=-EINVAL;
1161 break;
1162 }
1163
1164 /* --- controls ---------------------------------------------- */
1165 case VIDIOC_QUERYCTRL:
1166 {
1167 struct v4l2_queryctrl *qc = arg;
1168 int i;
1169
1170 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1171 if (qc->id && qc->id == vivi_qctrl[i].id) {
1172 memcpy(qc, &(vivi_qctrl[i]),
1173 sizeof(*qc));
1174 break;
1175 }
1176
1177 ret=-EINVAL;
1178 break;
1179 }
1180 case VIDIOC_G_CTRL:
1181 {
1182 struct v4l2_control *ctrl = arg;
1183 int i;
1184
1185 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1186 if (ctrl->id == vivi_qctrl[i].id) {
1187 ctrl->value=qctl_regs[i];
1188 break;
1189 }
1190
1191 ret=-EINVAL;
1192 break;
1193 }
1194 case VIDIOC_S_CTRL:
1195 {
1196 struct v4l2_control *ctrl = arg;
1197 int i;
1198 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1199 if (ctrl->id == vivi_qctrl[i].id) {
1200 if (ctrl->value <
1201 vivi_qctrl[i].minimum
1202 || ctrl->value >
1203 vivi_qctrl[i].maximum) {
1204 ret=-ERANGE;
1205 break;
1206 }
1207 qctl_regs[i]=ctrl->value;
1208 break;
1209 }
1210 ret=-EINVAL;
1211 break;
1212 }
1213 default:
1214 ret=v4l_compat_translate_ioctl(inode,file,cmd,arg,vivi_do_ioctl);
1215 }
1216
1217 if (debug) {
1218 if (ret<0) {
1219 v4l_print_ioctl("vivi(err)", cmd);
1220 dprintk(1,"errcode=%d\n",ret);
1221 } else if (_IOC_DIR(cmd) & _IOC_READ)
1222 v4l_printk_ioctl_arg("vivi(r)",cmd, arg);
1223 }
1224
1225 return ret;
1226}
1227
1228static int vivi_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
1229{
1230 return video_usercopy(inode, file, cmd, arg, vivi_do_ioctl);
1231}
1232
1233/* ------------------------------------------------------------------
1234 File operations for the device
1235 ------------------------------------------------------------------*/
1236
1237#define line_buf_size(norm) (norm_maxw(norm)*(format.depth+7)/8)
1238
1239static int vivi_open(struct inode *inode, struct file *file)
1240{
1241 int minor = iminor(inode);
1242 struct vivi_dev *h,*dev = NULL;
1243 struct vivi_fh *fh;
1244 struct list_head *list;
1245 enum v4l2_buf_type type = 0;
1246 int i;
1247
1248 printk(KERN_DEBUG "vivi: open called (minor=%d)\n",minor);
1249
1250 list_for_each(list,&vivi_devlist) {
1251 h = list_entry(list, struct vivi_dev, vivi_devlist);
1252 if (h->video_dev.minor == minor) {
1253 dev = h;
1254 type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1255 }
1256 }
1257 if (NULL == dev)
1258 return -ENODEV;
1259
1260
1261 /* If more than one user, mutex should be added */
1262 dev->users++;
1263
1264 dprintk(1,"open minor=%d type=%s users=%d\n",
1265 minor,v4l2_type_names[type],dev->users);
1266
1267 /* allocate + initialize per filehandle data */
1268 fh = kzalloc(sizeof(*fh),GFP_KERNEL);
1269 if (NULL == fh) {
1270 dev->users--;
1271 return -ENOMEM;
1272 }
1273
1274 file->private_data = fh;
1275 fh->dev = dev;
1276 fh->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1277 fh->fmt = &format;
1278 fh->width = 640;
1279 fh->height = 480;
1280
1281 /* Put all controls at a sane state */
1282 for (i = 0; i < ARRAY_SIZE(vivi_qctrl); i++)
1283 qctl_regs[i] =vivi_qctrl[i].default_value;
1284
1285 dprintk(1,"Open: fh=0x%08lx, dev=0x%08lx, dev->vidq=0x%08lx\n",
1286 (unsigned long)fh,(unsigned long)dev,(unsigned long)&dev->vidq);
1287 dprintk(1,"Open: list_empty queued=%d\n",list_empty(&dev->vidq.queued));
1288 dprintk(1,"Open: list_empty active=%d\n",list_empty(&dev->vidq.active));
1289
1290 /* Resets frame counters */
1291 dev->h=0;
1292 dev->m=0;
1293 dev->s=0;
1294 dev->us=0;
1295 dev->jiffies=jiffies;
1296 sprintf(dev->timestr,"%02d:%02d:%02d:%03d",
1297 dev->h,dev->m,dev->s,(dev->us+500)/1000);
1298
1299 videobuf_queue_init(&fh->vb_vidq, &vivi_video_qops,
1300 NULL, NULL,
1301 fh->type,
1302 V4L2_FIELD_INTERLACED,
1303 sizeof(struct vivi_buffer),fh);
1304
1305 return 0;
1306}
1307
1308static ssize_t
1309vivi_read(struct file *file, char __user *data, size_t count, loff_t *ppos)
1310{
1311 struct vivi_fh *fh = file->private_data;
1312
1313 if (fh->type==V4L2_BUF_TYPE_VIDEO_CAPTURE) {
1314 if (res_locked(fh->dev))
1315 return -EBUSY;
1316 return videobuf_read_one(&fh->vb_vidq, data, count, ppos,
1317 file->f_flags & O_NONBLOCK);
1318 }
1319 return 0;
1320}
1321
1322static unsigned int
1323vivi_poll(struct file *file, struct poll_table_struct *wait)
1324{
1325 struct vivi_fh *fh = file->private_data;
1326 struct vivi_buffer *buf;
1327
1328 dprintk(1,"%s\n",__FUNCTION__);
1329
1330 if (V4L2_BUF_TYPE_VIDEO_CAPTURE != fh->type)
1331 return POLLERR;
1332
1333 if (res_get(fh->dev,fh)) {
1334 dprintk(1,"poll: mmap interface\n");
1335 /* streaming capture */
1336 if (list_empty(&fh->vb_vidq.stream))
1337 return POLLERR;
1338 buf = list_entry(fh->vb_vidq.stream.next,struct vivi_buffer,vb.stream);
1339 } else {
1340 dprintk(1,"poll: read() interface\n");
1341 /* read() capture */
1342 buf = (struct vivi_buffer*)fh->vb_vidq.read_buf;
1343 if (NULL == buf)
1344 return POLLERR;
1345 }
1346 poll_wait(file, &buf->vb.done, wait);
1347 if (buf->vb.state == STATE_DONE ||
1348 buf->vb.state == STATE_ERROR)
1349 return POLLIN|POLLRDNORM;
1350 return 0;
1351}
1352
1353static int vivi_release(struct inode *inode, struct file *file)
1354{
1355 struct vivi_fh *fh = file->private_data;
1356 struct vivi_dev *dev = fh->dev;
1357 struct vivi_dmaqueue *vidq = &dev->vidq;
1358
1359 int minor = iminor(inode);
1360
1361 vivi_stop_thread(vidq);
1362 videobuf_mmap_free(&fh->vb_vidq);
1363
1364 kfree (fh);
1365
1366 dev->users--;
1367
1368 printk(KERN_DEBUG "vivi: close called (minor=%d, users=%d)\n",minor,dev->users);
1369
1370 return 0;
1371}
1372
1373static int
1374vivi_mmap(struct file *file, struct vm_area_struct * vma)
1375{
1376 struct vivi_fh *fh = file->private_data;
1377 int ret;
1378
1379 dprintk (1,"mmap called, vma=0x%08lx\n",(unsigned long)vma);
1380
1381 ret=videobuf_mmap_mapper(&fh->vb_vidq, vma);
1382
1383 dprintk (1,"vma start=0x%08lx, size=%ld, ret=%d\n",
1384 (unsigned long)vma->vm_start,
1385 (unsigned long)vma->vm_end-(unsigned long)vma->vm_start,
1386 ret);
1387
1388 return ret;
1389}
1390
1391static struct file_operations vivi_fops = {
1392 .owner = THIS_MODULE,
1393 .open = vivi_open,
1394 .release = vivi_release,
1395 .read = vivi_read,
1396 .poll = vivi_poll,
1397 .ioctl = vivi_ioctl,
1398 .mmap = vivi_mmap,
1399 .llseek = no_llseek,
1400};
1401
1402static struct video_device vivi = {
1403 .name = "VTM Virtual Video Capture Board",
1404 .type = VID_TYPE_CAPTURE,
1405 .hardware = 0,
1406 .fops = &vivi_fops,
1407 .minor = -1,
1408// .release = video_device_release,
1409};
1410/* ------------------------------------------------------------------
1411 Initialization and module stuff
1412 ------------------------------------------------------------------*/
1413
1414static int __init vivi_init(void)
1415{
1416 int ret;
1417 struct vivi_dev *dev;
1418
1419 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
1420 if (NULL == dev)
1421 return -ENOMEM;
1422 list_add_tail(&dev->vivi_devlist,&vivi_devlist);
1423
1424 /* init video dma queues */
1425 INIT_LIST_HEAD(&dev->vidq.active);
1426 INIT_LIST_HEAD(&dev->vidq.queued);
1427
1428 /* initialize locks */
1429 init_MUTEX(&dev->lock);
1430
1431 dev->vidq.timeout.function = vivi_vid_timeout;
1432 dev->vidq.timeout.data = (unsigned long)dev;
1433 init_timer(&dev->vidq.timeout);
1434
1435 ret = video_register_device(&vivi, VFL_TYPE_GRABBER, video_nr);
1436 printk(KERN_INFO "Video Technology Magazine Virtual Video Capture Board (Load status: %d)\n", ret);
1437 return ret;
1438}
1439
1440static void __exit vivi_exit(void)
1441{
1442 struct vivi_dev *h;
1443 struct list_head *list;
1444
1445 list_for_each(list,&vivi_devlist) {
1446 h = list_entry(list, struct vivi_dev, vivi_devlist);
1447 kfree (h);
1448 }
1449 video_unregister_device(&vivi);
1450}
1451
1452module_init(vivi_init);
1453module_exit(vivi_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-09 03:30:34 -0400