From 67b60aad168cfdd40ffec12f14b93e2e68f7d486 Mon Sep 17 00:00:00 2001 From: Chris Pascoe Date: Sat, 10 Feb 2007 10:17:57 -0300 Subject: V4L/DVB (5215): Experimental support for signal strength/BER/uncorrectable count After studying many hours worth of register dumps of MT352 and ZL10353 fed with identically damaged RF signals I have made an educated guess at which registers contain the AGC level, bit error rate and uncorrectable error count values. Implement the IOCTLs that return these values to userspace. Signed-off-by: Chris Pascoe Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/frontends/zl10353.c | 36 +++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) (limited to 'drivers') diff --git a/drivers/media/dvb/frontends/zl10353.c b/drivers/media/dvb/frontends/zl10353.c index a1b0afbd47ba..0d8241de89ee 100644 --- a/drivers/media/dvb/frontends/zl10353.c +++ b/drivers/media/dvb/frontends/zl10353.c @@ -213,6 +213,29 @@ static int zl10353_read_status(struct dvb_frontend *fe, fe_status_t *status) return 0; } +static int zl10353_read_ber(struct dvb_frontend *fe, u32 *ber) +{ + struct zl10353_state *state = fe->demodulator_priv; + + *ber = zl10353_read_register(state, 0x11) << 16 | + zl10353_read_register(state, 0x12) << 8 | + zl10353_read_register(state, 0x13); + + return 0; +} + +static int zl10353_read_signal_strength(struct dvb_frontend *fe, u16 *strength) +{ + struct zl10353_state *state = fe->demodulator_priv; + + u16 signal = zl10353_read_register(state, 0x0a) << 10 | + zl10353_read_register(state, 0x0b) << 2 | 3; + + *strength = ~signal; + + return 0; +} + static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr) { struct zl10353_state *state = fe->demodulator_priv; @@ -227,6 +250,16 @@ static int zl10353_read_snr(struct dvb_frontend *fe, u16 *snr) return 0; } +static int zl10353_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) +{ + struct zl10353_state *state = fe->demodulator_priv; + + *ucblocks = zl10353_read_register(state, 0x14) << 8 | + zl10353_read_register(state, 0x15); + + return 0; +} + static int zl10353_get_tune_settings(struct dvb_frontend *fe, struct dvb_frontend_tune_settings *fe_tune_settings) @@ -325,7 +358,10 @@ static struct dvb_frontend_ops zl10353_ops = { .get_tune_settings = zl10353_get_tune_settings, .read_status = zl10353_read_status, + .read_ber = zl10353_read_ber, + .read_signal_strength = zl10353_read_signal_strength, .read_snr = zl10353_read_snr, + .read_ucblocks = zl10353_read_ucblocks, }; module_param(debug_regs, int, 0644); -- cgit v1.2.3