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[media] m88rs2000: SNR, BER implemented

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Trivial patch to implement SNR, BER, UCB counter for Montage rs2000 demod.

Signed-off-by: Igor M. Liplianin <liplianin@me.by>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Igor M. Liplianin 2012-12-28 19:40:16 -03:00 committed by Mauro Carvalho Chehab
parent a3e7ad256c
commit 38f7889cea
1 changed files with 36 additions and 8 deletions
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44
drivers/media/dvb-frontends/m88rs2000.c
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@ -492,12 +492,29 @@ static int m88rs2000_read_status(struct dvb_frontend *fe, fe_status_t *status)
return 0;
}
/* Extact code for these unknown but lmedm04 driver uses interupt callbacks */
static int m88rs2000_read_ber(struct dvb_frontend *fe, u32 *ber)
{
deb_info("m88rs2000_read_ber %d\n", *ber);
*ber = 0;
struct m88rs2000_state *state = fe->demodulator_priv;
u8 tmp0, tmp1;
m88rs2000_demod_write(state, 0x9a, 0x30);
tmp0 = m88rs2000_demod_read(state, 0xd8);
if ((tmp0 & 0x10) != 0) {
m88rs2000_demod_write(state, 0x9a, 0xb0);
*ber = 0xffffffff;
return 0;
}
*ber = (m88rs2000_demod_read(state, 0xd7) << 8) |
m88rs2000_demod_read(state, 0xd6);
tmp1 = m88rs2000_demod_read(state, 0xd9);
m88rs2000_demod_write(state, 0xd9, (tmp1 & ~7) | 4);
/* needs twice */
m88rs2000_demod_write(state, 0xd8, (tmp0 & ~8) | 0x30);
m88rs2000_demod_write(state, 0xd8, (tmp0 & ~8) | 0x30);
m88rs2000_demod_write(state, 0x9a, 0xb0);
return 0;
}
@ -510,15 +527,26 @@ static int m88rs2000_read_signal_strength(struct dvb_frontend *fe,
static int m88rs2000_read_snr(struct dvb_frontend *fe, u16 *snr)
{
deb_info("m88rs2000_read_snr %d\n", *snr);
*snr = 0;
struct m88rs2000_state *state = fe->demodulator_priv;
*snr = 512 * m88rs2000_demod_read(state, 0x65);
return 0;
}
static int m88rs2000_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
deb_info("m88rs2000_read_ber %d\n", *ucblocks);
*ucblocks = 0;
struct m88rs2000_state *state = fe->demodulator_priv;
u8 tmp;
*ucblocks = (m88rs2000_demod_read(state, 0xd5) << 8) |
m88rs2000_demod_read(state, 0xd4);
tmp = m88rs2000_demod_read(state, 0xd8);
m88rs2000_demod_write(state, 0xd8, tmp & ~0x20);
/* needs two times */
m88rs2000_demod_write(state, 0xd8, tmp | 0x20);
m88rs2000_demod_write(state, 0xd8, tmp | 0x20);
return 0;
}