1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/*
bttv - Bt848 frame grabber driver
vbi interface
(c) 2002 Gerd Knorr <kraxel@bytesex.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/kdev_t.h>
#include <asm/io.h>
#include "bttvp.h"
#define VBI_DEFLINES 16
#define VBI_MAXLINES 32
static unsigned int vbibufs = 4;
static unsigned int vbi_debug = 0;
module_param(vbibufs, int, 0444);
module_param(vbi_debug, int, 0644);
MODULE_PARM_DESC(vbibufs,"number of vbi buffers, range 2-32, default 4");
MODULE_PARM_DESC(vbi_debug,"vbi code debug messages, default is 0 (no)");
#ifdef dprintk
# undef dprintk
#endif
#define dprintk(fmt, arg...) if (vbi_debug) \
printk(KERN_DEBUG "bttv%d/vbi: " fmt, btv->c.nr , ## arg)
/* ----------------------------------------------------------------------- */
/* vbi risc code + mm */
static int
vbi_buffer_risc(struct bttv *btv, struct bttv_buffer *buf, int lines)
{
int bpl = 2048;
bttv_risc_packed(btv, &buf->top, buf->vb.dma.sglist,
0, bpl-4, 4, lines);
bttv_risc_packed(btv, &buf->bottom, buf->vb.dma.sglist,
lines * bpl, bpl-4, 4, lines);
return 0;
}
static int vbi_buffer_setup(struct videobuf_queue *q,
unsigned int *count, unsigned int *size)
{
struct bttv_fh *fh = q->priv_data;
struct bttv *btv = fh->btv;
if (0 == *count)
*count = vbibufs;
*size = fh->lines * 2 * 2048;
dprintk("setup: lines=%d\n",fh->lines);
return 0;
}
static int vbi_buffer_prepare(struct videobuf_queue *q,
struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct bttv_fh *fh = q->priv_data;
struct bttv *btv = fh->btv;
struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
int rc;
buf->vb.size = fh->lines * 2 * 2048;
if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
return -EINVAL;
if (STATE_NEEDS_INIT == buf->vb.state) {
if (0 != (rc = videobuf_iolock(btv->c.pci, &buf->vb, NULL)))
goto fail;
if (0 != (rc = vbi_buffer_risc(btv,buf,fh->lines)))
goto fail;
}
buf->vb.state = STATE_PREPARED;
buf->vb.field = field;
dprintk("buf prepare %p: top=%p bottom=%p field=%s\n",
vb, &buf->top, &buf->bottom,
v4l2_field_names[buf->vb.field]);
return 0;
fail:
bttv_dma_free(btv,buf);
return rc;
}
static void
vbi_buffer_queue(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
struct bttv_fh *fh = q->priv_data;
struct bttv *btv = fh->btv;
struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
dprintk("queue %p\n",vb);
buf->vb.state = STATE_QUEUED;
list_add_tail(&buf->vb.queue,&btv->vcapture);
if (NULL == btv->cvbi) {
fh->btv->loop_irq |= 4;
bttv_set_dma(btv,0x0c);
}
}
static void vbi_buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
struct bttv_fh *fh = q->priv_data;
struct bttv *btv = fh->btv;
struct bttv_buffer *buf = container_of(vb,struct bttv_buffer,vb);
dprintk("free %p\n",vb);
bttv_dma_free(fh->btv,buf);
}
struct videobuf_queue_ops bttv_vbi_qops = {
.buf_setup = vbi_buffer_setup,
.buf_prepare = vbi_buffer_prepare,
.buf_queue = vbi_buffer_queue,
.buf_release = vbi_buffer_release,
};
/* ----------------------------------------------------------------------- */
void bttv_vbi_setlines(struct bttv_fh *fh, struct bttv *btv, int lines)
{
int vdelay;
if (lines < 1)
lines = 1;
if (lines > VBI_MAXLINES)
lines = VBI_MAXLINES;
fh->lines = lines;
vdelay = btread(BT848_E_VDELAY_LO);
if (vdelay < lines*2) {
vdelay = lines*2;
btwrite(vdelay,BT848_E_VDELAY_LO);
btwrite(vdelay,BT848_O_VDELAY_LO);
}
}
void bttv_vbi_try_fmt(struct bttv_fh *fh, struct v4l2_format *f)
{
const struct bttv_tvnorm *tvnorm;
u32 start0,start1;
s32 count0,count1,count;
tvnorm = &bttv_tvnorms[fh->btv->tvnorm];
f->type = V4L2_BUF_TYPE_VBI_CAPTURE;
f->fmt.vbi.sampling_rate = tvnorm->Fsc;
f->fmt.vbi.samples_per_line = 2048;
f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
f->fmt.vbi.offset = 244;
f->fmt.vbi.flags = 0;
switch (fh->btv->tvnorm) {
case 1: /* NTSC */
start0 = 10;
start1 = 273;
break;
case 0: /* PAL */
case 2: /* SECAM */
default:
start0 = 7;
start1 = 320;
}
count0 = (f->fmt.vbi.start[0] + f->fmt.vbi.count[0]) - start0;
count1 = (f->fmt.vbi.start[1] + f->fmt.vbi.count[1]) - start1;
count = max(count0,count1);
if (count > VBI_MAXLINES)
count = VBI_MAXLINES;
if (count < 1)
count = 1;
f->fmt.vbi.start[0] = start0;
f->fmt.vbi.start[1] = start1;
f->fmt.vbi.count[0] = count;
f->fmt.vbi.count[1] = count;
}
void bttv_vbi_get_fmt(struct bttv_fh *fh, struct v4l2_format *f)
{
const struct bttv_tvnorm *tvnorm;
tvnorm = &bttv_tvnorms[fh->btv->tvnorm];
memset(f,0,sizeof(*f));
f->type = V4L2_BUF_TYPE_VBI_CAPTURE;
f->fmt.vbi.sampling_rate = tvnorm->Fsc;
f->fmt.vbi.samples_per_line = 2048;
f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
f->fmt.vbi.offset = 244;
f->fmt.vbi.count[0] = fh->lines;
f->fmt.vbi.count[1] = fh->lines;
f->fmt.vbi.flags = 0;
switch (fh->btv->tvnorm) {
case 1: /* NTSC */
f->fmt.vbi.start[0] = 10;
f->fmt.vbi.start[1] = 273;
break;
case 0: /* PAL */
case 2: /* SECAM */
default:
f->fmt.vbi.start[0] = 7;
f->fmt.vbi.start[1] = 319;
}
}
/* ----------------------------------------------------------------------- */
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
|
