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add speed calculation (not used yet)

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This commit is contained in:
Ralph Metzler 2016-06-16 15:40:24 +02:00
parent ffdcd91a06
commit 805a3ffeed
1 changed files with 76 additions and 0 deletions
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76
ddbridge/ddbridge-core.c
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@ -547,6 +547,82 @@ static void ddb_buffers_free(struct ddb *dev)
} }
} }
static void calc_speed(struct ddb_output *output, u32 *con, u32 *con2)
{
struct ddb *dev = output->port->dev;
u32 bitrate = output->port->obr;
u32 flags = 0;//pdx->OutputStream[Stream].flags;
u32 gap = 6;
u32 NCOIncrement = 0;
u32 Control = 0x3C; /* Turn clock on, Enable GAP, Enable NP, Phase = 1 */
u32 Maxbitrate = 72000;
if (flags & 0x00000008) /* ts start */
Control |= 0x2000;
if (dev->link[0].info->type == DDB_OCTOPUS_CI && output->port->nr > 1) {
Control = 0x00;
if (flags & 0x00000004) { /* Override timing */
if (flags & 0x00000800)
Control = 0x08; // Clock Edge
Control |= (flags & 0x00000700); // Clock Delay
} else
Control = 0x00000300; // Rising edge 21 ns setup time
if (dev->link[0].ids.regmapid >= 0x10003 &&
(flags & 0x00000001) == 0) {
if ((flags & 0x00000002) == 0) {
// NCO
Maxbitrate = 0;
gap = 0;
if (bitrate == 72000)
Control |= 0x24;
else
if (bitrate >= 96000)
Control |= 0x824;
else {
Control |= 0x1024;
NCOIncrement = (bitrate * 8192 + 71999) / 72000;
}
} else {
// Divider
Control |= 0x1834;
if (bitrate <= 64000) {
Maxbitrate = 64000;
NCOIncrement = 8;
} else if( bitrate <= 72000) {
Maxbitrate = 72000;
NCOIncrement = 7;
} else {
Maxbitrate = 96000;
NCOIncrement = 5;
}
}
} else {
if (bitrate > 72000) {
Control |= 0x834; // Enable 96 MBit/s CI+ Speed
Maxbitrate = 96000;
}
}
}
if (Maxbitrate > 0) {
if (bitrate > Maxbitrate)
bitrate = Maxbitrate;
if (bitrate < 31000)
bitrate = 31000;
gap = ((Maxbitrate - bitrate) * 94) / bitrate;
if (gap < 2)
Control &= ~0x10; // Disable gap
else
gap -= 2;
if (gap > 127)
gap = 127;
}
*con = Control;
*con2 = (NCOIncrement << 16) | gap;
return;
}
static void ddb_output_start(struct ddb_output *output) static void ddb_output_start(struct ddb_output *output)
{ {
struct ddb *dev = output->port->dev; struct ddb *dev = output->port->dev;