diff options
| author | Steven Toth <stoth@linuxtv.org> | 2008-11-02 23:04:44 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2008-11-06 19:05:49 -0800 |
| commit | 3d6b04d6871d38b6791a949d81b42aea0d7a389b (patch) | |
| tree | a1ae92b0da950650b97b39c942e63e36f9a49d8b | |
| parent | d4875d4acf2b1594e1a7f643dcf2b50fefbb7879 (diff) | |
DVB: s5h1411: bugfix: Setting serial or parallel mode could destroy bits
cherry picked from commit 1af46b450fa49c57d73764d66f267335ccd807e2
DVB: s5h1411: bugfix: Setting serial or parallel mode could destroy bits
Adding a serialmode function to read/and/or/write the register for safety.
Signed-off-by: Steven Toth <stoth@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/media/dvb/frontends/s5h1411.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/media/dvb/frontends/s5h1411.c b/drivers/media/dvb/frontends/s5h1411.c index 2da1a3763de..a710ea387ab 100644 --- a/drivers/media/dvb/frontends/s5h1411.c +++ b/drivers/media/dvb/frontends/s5h1411.c @@ -471,6 +471,20 @@ static int s5h1411_set_spectralinversion(struct dvb_frontend *fe, int inversion) return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x24, val); } +static int s5h1411_set_serialmode(struct dvb_frontend *fe, int serial) +{ + struct s5h1411_state *state = fe->demodulator_priv; + u16 val; + + dprintk("%s(%d)\n", __func__, serial); + val = s5h1411_readreg(state, S5H1411_I2C_TOP_ADDR, 0xbd) & ~0x100; + + if (serial == 1) + val |= 0x100; + + return s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbd, val); +} + static int s5h1411_enable_modulation(struct dvb_frontend *fe, fe_modulation_t m) { @@ -612,10 +626,10 @@ static int s5h1411_init(struct dvb_frontend *fe) if (state->config->output_mode == S5H1411_SERIAL_OUTPUT) /* Serial */ - s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbd, 0x1101); + s5h1411_set_serialmode(fe, 1); else /* Parallel */ - s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0xbd, 0x1001); + s5h1411_set_serialmode(fe, 0); s5h1411_set_spectralinversion(fe, state->config->inversion); s5h1411_set_if_freq(fe, state->config->vsb_if); |