From af5c8e1523edf792f57ec938aef9423783af25e1 Mon Sep 17 00:00:00 2001 From: Devin Heitmueller Date: Tue, 27 Oct 2009 23:33:21 -0300 Subject: V4L/DVB (13329): s5h1409: provide HVR-1600 specific optimizations Perform some optimization of the register configuration based on a trace of the HVR-1600 Windows i2c traffic (and consultation with Steven Toth). Note that some of these values may be able to be moved into the common driver, but I am holding off on that until they can be tested with other boards. This work was sponsored by ONELAN Limited. Cc: Steven Toth Signed-off-by: Devin Heitmueller Signed-off-by: Mauro Carvalho Chehab --- drivers/media/dvb/frontends/s5h1409.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/media/dvb/frontends/s5h1409.c') diff --git a/drivers/media/dvb/frontends/s5h1409.c b/drivers/media/dvb/frontends/s5h1409.c index fb3011518427..85fba581c5ab 100644 --- a/drivers/media/dvb/frontends/s5h1409.c +++ b/drivers/media/dvb/frontends/s5h1409.c @@ -614,6 +614,21 @@ static int s5h1409_init(struct dvb_frontend *fe) /* The datasheet says that after initialisation, VSB is default */ state->current_modulation = VSB_8; + /* Optimize for the HVR-1600 if appropriate. Note that some of these + may get folded into the generic case after testing with other + devices */ + if (state->config->hvr1600_opt == S5H1409_HVR1600_OPTIMIZE) { + /* VSB AGC REF */ + s5h1409_writereg(state, 0x09, 0x0050); + + /* Unknown but Windows driver does it... */ + s5h1409_writereg(state, 0x21, 0x0001); + s5h1409_writereg(state, 0x50, 0x030e); + + /* QAM AGC REF */ + s5h1409_writereg(state, 0x82, 0x0800); + } + if (state->config->output_mode == S5H1409_SERIAL_OUTPUT) s5h1409_writereg(state, 0xab, s5h1409_readreg(state, 0xab) | 0x100); /* Serial */ -- cgit v1.2.3