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[media] au8522: improve lock performance with ZeeVee modulators

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Improves lock performance with signals from the ZeeVee family
of modulators.

Signed-off-by: Richard Vollkommer <linux@hauppauge.com>
Cc: Devin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Richard Vollkommer 2014-10-25 17:17:23 -03:00 committed by Mauro Carvalho Chehab
parent 52e269b133
commit dcc33cc57d
1 changed files with 110 additions and 7 deletions
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117
drivers/media/dvb-frontends/au8522_dig.c
View file

@ -29,6 +29,7 @@
#include "au8522_priv.h"
static int debug;
static int zv_mode = 1; /* default to on */
#define dprintk(arg...)\
do { if (debug)\
@ -469,6 +470,87 @@ static struct {
{ 0x8526, 0x01 },
};
static struct {
u16 reg;
u16 data;
} QAM256_mod_tab_zv_mode[] = {
{ 0x80a3, 0x09 },
{ 0x80a4, 0x00 },
{ 0x8081, 0xc4 },
{ 0x80a5, 0x40 },
{ 0x80b5, 0xfb },
{ 0x80b6, 0x8e },
{ 0x80b7, 0x39 },
{ 0x80aa, 0x77 },
{ 0x80ad, 0x77 },
{ 0x80a6, 0x67 },
{ 0x8262, 0x20 },
{ 0x821c, 0x30 },
{ 0x80b8, 0x3e },
{ 0x80b9, 0xf0 },
{ 0x80ba, 0x01 },
{ 0x80bb, 0x18 },
{ 0x80bc, 0x50 },
{ 0x80bd, 0x00 },
{ 0x80be, 0xea },
{ 0x80bf, 0xef },
{ 0x80c0, 0xfc },
{ 0x80c1, 0xbd },
{ 0x80c2, 0x1f },
{ 0x80c3, 0xfc },
{ 0x80c4, 0xdd },
{ 0x80c5, 0xaf },
{ 0x80c6, 0x00 },
{ 0x80c7, 0x38 },
{ 0x80c8, 0x30 },
{ 0x80c9, 0x05 },
{ 0x80ca, 0x4a },
{ 0x80cb, 0xd0 },
{ 0x80cc, 0x01 },
{ 0x80cd, 0xd9 },
{ 0x80ce, 0x6f },
{ 0x80cf, 0xf9 },
{ 0x80d0, 0x70 },
{ 0x80d1, 0xdf },
{ 0x80d2, 0xf7 },
{ 0x80d3, 0xc2 },
{ 0x80d4, 0xdf },
{ 0x80d5, 0x02 },
{ 0x80d6, 0x9a },
{ 0x80d7, 0xd0 },
{ 0x8250, 0x0d },
{ 0x8251, 0xcd },
{ 0x8252, 0xe0 },
{ 0x8253, 0x05 },
{ 0x8254, 0xa7 },
{ 0x8255, 0xff },
{ 0x8256, 0xed },
{ 0x8257, 0x5b },
{ 0x8258, 0xae },
{ 0x8259, 0xe6 },
{ 0x825a, 0x3d },
{ 0x825b, 0x0f },
{ 0x825c, 0x0d },
{ 0x825d, 0xea },
{ 0x825e, 0xf2 },
{ 0x825f, 0x51 },
{ 0x8260, 0xf5 },
{ 0x8261, 0x06 },
{ 0x821a, 0x01 },
{ 0x8546, 0x40 },
{ 0x8210, 0x26 },
{ 0x8211, 0xf6 },
{ 0x8212, 0x84 },
{ 0x8213, 0x02 },
{ 0x8502, 0x01 },
{ 0x8121, 0x04 },
{ 0x8122, 0x04 },
{ 0x852e, 0x10 },
{ 0x80a4, 0xca },
{ 0x80a7, 0x40 },
{ 0x8526, 0x01 },
};
static int au8522_enable_modulation(struct dvb_frontend *fe,
fe_modulation_t m)
{
@ -495,12 +577,23 @@ static int au8522_enable_modulation(struct dvb_frontend *fe,
au8522_set_if(fe, state->config->qam_if);
break;
case QAM_256:
dprintk("%s() QAM 256\n", __func__);
for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab); i++)
au8522_writereg(state,
QAM256_mod_tab[i].reg,
QAM256_mod_tab[i].data);
au8522_set_if(fe, state->config->qam_if);
if (zv_mode) {
dprintk("%s() QAM 256 (zv_mode)\n", __func__);
for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab_zv_mode); i++)
au8522_writereg(state,
QAM256_mod_tab_zv_mode[i].reg,
QAM256_mod_tab_zv_mode[i].data);
au8522_set_if(fe, state->config->qam_if);
msleep(100);
au8522_writereg(state, 0x821a, 0x00);
} else {
dprintk("%s() QAM 256\n", __func__);
for (i = 0; i < ARRAY_SIZE(QAM256_mod_tab); i++)
au8522_writereg(state,
QAM256_mod_tab[i].reg,
QAM256_mod_tab[i].data);
au8522_set_if(fe, state->config->qam_if);
}
break;
default:
dprintk("%s() Invalid modulation\n", __func__);
@ -537,7 +630,12 @@ static int au8522_set_frontend(struct dvb_frontend *fe)
return ret;
/* Allow the tuner to settle */
msleep(100);
if (zv_mode) {
dprintk("%s() increase tuner settling time for zv_mode\n",
__func__);
msleep(250);
} else
msleep(100);
au8522_enable_modulation(fe, c->modulation);
@ -823,6 +921,11 @@ static struct dvb_frontend_ops au8522_ops = {
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Enable verbose debug messages");
module_param(zv_mode, int, 0644);
MODULE_PARM_DESC(zv_mode, "Turn on/off ZeeVee modulator compatability mode (default:on).\n"
"\t\ton - modified AU8522 QAM256 initialization.\n"
"\t\tProvides faster lock when using ZeeVee modulator based sources");
MODULE_DESCRIPTION("Auvitek AU8522 QAM-B/ATSC Demodulator driver");
MODULE_AUTHOR("Steven Toth");
MODULE_LICENSE("GPL");