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
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
|
/*
* Driver for the Conexant CX23885 PCIe bridge
*
* Copyright (c) 2007 Steven Toth <stoth@linuxtv.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/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include "cx23885.h"
static unsigned int vbibufs = 4;
module_param(vbibufs, int, 0644);
MODULE_PARM_DESC(vbibufs, "number of vbi buffers, range 2-32");
static unsigned int vbi_debug;
module_param(vbi_debug, int, 0644);
MODULE_PARM_DESC(vbi_debug, "enable debug messages [vbi]");
#define dprintk(level, fmt, arg...)\
do { if (vbi_debug >= level)\
printk(KERN_DEBUG "%s/0: " fmt, dev->name, ## arg);\
} while (0)
/* ------------------------------------------------------------------ */
#define VBI_LINE_LENGTH 1440
#define NTSC_VBI_START_LINE 10 /* line 10 - 21 */
#define NTSC_VBI_END_LINE 21
#define NTSC_VBI_LINES (NTSC_VBI_END_LINE - NTSC_VBI_START_LINE + 1)
int cx23885_vbi_fmt(struct file *file, void *priv,
struct v4l2_format *f)
{
struct cx23885_fh *fh = priv;
struct cx23885_dev *dev = fh->dev;
if (dev->tvnorm & V4L2_STD_525_60) {
/* ntsc */
f->fmt.vbi.samples_per_line = VBI_LINE_LENGTH;
f->fmt.vbi.sampling_rate = 27000000;
f->fmt.vbi.sample_format = V4L2_PIX_FMT_GREY;
f->fmt.vbi.offset = 0;
f->fmt.vbi.flags = 0;
f->fmt.vbi.start[0] = 10;
f->fmt.vbi.count[0] = 17;
f->fmt.vbi.start[1] = 263 + 10 + 1;
f->fmt.vbi.count[1] = 17;
} else if (dev->tvnorm & V4L2_STD_625_50) {
/* pal */
f->fmt.vbi.sampling_rate = 35468950;
f->fmt.vbi.start[0] = 7 - 1;
f->fmt.vbi.start[1] = 319 - 1;
}
return 0;
}
/* We're given the Video Interrupt status register.
* The cx23885_video_irq() func has already validated
* the potential error bits, we just need to
* deal with vbi payload and return indication if
* we actually processed any payload.
*/
int cx23885_vbi_irq(struct cx23885_dev *dev, u32 status)
{
u32 count;
int handled = 0;
if (status & VID_BC_MSK_VBI_RISCI1) {
dprintk(1, "%s() VID_BC_MSK_VBI_RISCI1\n", __func__);
spin_lock(&dev->slock);
count = cx_read(VID_A_GPCNT);
cx23885_video_wakeup(dev, &dev->vbiq, count);
spin_unlock(&dev->slock);
handled++;
}
if (status & VID_BC_MSK_VBI_RISCI2) {
dprintk(1, "%s() VID_BC_MSK_VBI_RISCI2\n", __func__);
dprintk(2, "stopper vbi\n");
spin_lock(&dev->slock);
cx23885_restart_vbi_queue(dev, &dev->vbiq);
spin_unlock(&dev->slock);
handled++;
}
return handled;
}
static int cx23885_start_vbi_dma(struct cx23885_dev *dev,
struct cx23885_dmaqueue *q,
struct cx23885_buffer *buf)
{
dprintk(1, "%s()\n", __func__);
/* setup fifo + format */
cx23885_sram_channel_setup(dev, &dev->sram_channels[SRAM_CH02],
buf->vb.width, buf->risc.dma);
/* reset counter */
cx_write(VID_A_GPCNT_CTL, 3);
cx_write(VID_A_VBI_CTRL, 3);
cx_write(VBI_A_GPCNT_CTL, 3);
q->count = 1;
/* enable irq */
cx23885_irq_add_enable(dev, 0x01);
cx_set(VID_A_INT_MSK, 0x000022);
/* start dma */
cx_set(DEV_CNTRL2, (1<<5));
cx_set(VID_A_DMA_CTL, 0x22); /* FIFO and RISC enable */
return 0;
}
int cx23885_restart_vbi_queue(struct cx23885_dev *dev,
struct cx23885_dmaqueue *q)
{
struct cx23885_buffer *buf;
struct list_head *item;
if (list_empty(&q->active))
return 0;
buf = list_entry(q->active.next, struct cx23885_buffer, vb.queue);
dprintk(2, "restart_queue [%p/%d]: restart dma\n",
buf, buf->vb.i);
cx23885_start_vbi_dma(dev, q, buf);
list_for_each(item, &q->active) {
buf = list_entry(item, struct cx23885_buffer, vb.queue);
buf->count = q->count++;
}
mod_timer(&q->timeout, jiffies + (BUFFER_TIMEOUT / 30));
return 0;
}
void cx23885_vbi_timeout(unsigned long data)
{
struct cx23885_dev *dev = (struct cx23885_dev *)data;
struct cx23885_dmaqueue *q = &dev->vbiq;
struct cx23885_buffer *buf;
unsigned long flags;
/* Stop the VBI engine */
cx_clear(VID_A_DMA_CTL, 0x22);
spin_lock_irqsave(&dev->slock, flags);
while (!list_empty(&q->active)) {
buf = list_entry(q->active.next, struct cx23885_buffer,
vb.queue);
list_del(&buf->vb.queue);
buf->vb.state = VIDEOBUF_ERROR;
wake_up(&buf->vb.done);
printk("%s/0: [%p/%d] timeout - dma=0x%08lx\n", dev->name,
buf, buf->vb.i, (unsigned long)buf->risc.dma);
}
cx23885_restart_vbi_queue(dev, q);
spin_unlock_irqrestore(&dev->slock, flags);
}
/* ------------------------------------------------------------------ */
#define VBI_LINE_LENGTH 1440
#define VBI_LINE_COUNT 17
static int
vbi_setup(struct videobuf_queue *q, unsigned int *count, unsigned int *size)
{
*size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
if (0 == *count)
*count = vbibufs;
if (*count < 2)
*count = 2;
if (*count > 32)
*count = 32;
return 0;
}
static int
vbi_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct cx23885_fh *fh = q->priv_data;
struct cx23885_dev *dev = fh->dev;
struct cx23885_buffer *buf = container_of(vb,
struct cx23885_buffer, vb);
struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
unsigned int size;
int rc;
size = VBI_LINE_COUNT * VBI_LINE_LENGTH * 2;
if (0 != buf->vb.baddr && buf->vb.bsize < size)
return -EINVAL;
if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
buf->vb.width = VBI_LINE_LENGTH;
buf->vb.height = VBI_LINE_COUNT;
buf->vb.size = size;
buf->vb.field = V4L2_FIELD_SEQ_TB;
rc = videobuf_iolock(q, &buf->vb, NULL);
if (0 != rc)
goto fail;
cx23885_risc_vbibuffer(dev->pci, &buf->risc,
dma->sglist,
0, buf->vb.width * buf->vb.height,
buf->vb.width, 0,
buf->vb.height);
}
buf->vb.state = VIDEOBUF_PREPARED;
return 0;
fail:
cx23885_free_buffer(q, buf);
return rc;
}
static void
vbi_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
{
struct cx23885_buffer *buf =
container_of(vb, struct cx23885_buffer, vb);
struct cx23885_buffer *prev;
struct cx23885_fh *fh = vq->priv_data;
struct cx23885_dev *dev = fh->dev;
struct cx23885_dmaqueue *q = &dev->vbiq;
/* add jump to stopper */
buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
buf->risc.jmp[1] = cpu_to_le32(q->stopper.dma);
buf->risc.jmp[2] = cpu_to_le32(0); /* bits 63-32 */
if (list_empty(&q->active)) {
list_add_tail(&buf->vb.queue, &q->active);
cx23885_start_vbi_dma(dev, q, buf);
buf->vb.state = VIDEOBUF_ACTIVE;
buf->count = q->count++;
mod_timer(&q->timeout, jiffies + (BUFFER_TIMEOUT / 30));
dprintk(2, "[%p/%d] vbi_queue - first active\n",
buf, buf->vb.i);
} else {
prev = list_entry(q->active.prev, struct cx23885_buffer,
vb.queue);
list_add_tail(&buf->vb.queue, &q->active);
buf->vb.state = VIDEOBUF_ACTIVE;
buf->count = q->count++;
prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
prev->risc.jmp[2] = cpu_to_le32(0); /* Bits 63-32 */
dprintk(2, "[%p/%d] buffer_queue - append to active\n",
buf, buf->vb.i);
}
}
static void vbi_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
{
struct cx23885_buffer *buf =
container_of(vb, struct cx23885_buffer, vb);
cx23885_free_buffer(q, buf);
}
struct videobuf_queue_ops cx23885_vbi_qops = {
.buf_setup = vbi_setup,
.buf_prepare = vbi_prepare,
.buf_queue = vbi_queue,
.buf_release = vbi_release,
};
/* ------------------------------------------------------------------ */
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
|
