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| author | Chris Pascoe <c.pascoe@itee.uq.edu.au> | 2007-02-10 13:17:57 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2007-02-21 15:35:21 (GMT) |
| commit | 67b60aad168cfdd40ffec12f14b93e2e68f7d486 (patch) | |
| tree | 83f6ce2c66742eb0c8d4190e8e62ddac57e7c26a /drivers/media | |
| parent | 90060d32ca0a941b158994f78e60d0381871c84b (diff) | |
| download | linux-fsl-qoriq-67b60aad168cfdd40ffec12f14b93e2e68f7d486.tar.xz | |
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 <c.pascoe@itee.uq.edu.au>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb/frontends/zl10353.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/zl10353.c b/drivers/media/dvb/frontends/zl10353.c index a1b0afb..0d8241d 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); |