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path: root/drivers/media/dvb/frontends/cx24123.c
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Diffstat (limited to 'drivers/media/dvb/frontends/cx24123.c')
-rw-r--r--drivers/media/dvb/frontends/cx24123.c98
1 files changed, 56 insertions, 42 deletions
diff --git a/drivers/media/dvb/frontends/cx24123.c b/drivers/media/dvb/frontends/cx24123.c
index 274a87b7a5d..62d69a6ea69 100644
--- a/drivers/media/dvb/frontends/cx24123.c
+++ b/drivers/media/dvb/frontends/cx24123.c
@@ -45,9 +45,6 @@ struct cx24123_state
struct dvb_frontend frontend;
- u32 lastber;
- u16 snr;
-
/* Some PLL specifics for tuning */
u32 VCAarg;
u32 VGAarg;
@@ -194,7 +191,7 @@ static struct {
{0x06, 0x31}, /* MPEG (default) */
{0x0b, 0x00}, /* Freq search start point (default) */
{0x0c, 0x00}, /* Demodulator sample gain (default) */
- {0x0d, 0x02}, /* Frequency search range = Fsymbol / 4 (default) */
+ {0x0d, 0x7f}, /* Force driver to shift until the maximum (+-10 MHz) */
{0x0e, 0x03}, /* Default non-inverted, FEC 3/4 (default) */
{0x0f, 0xfe}, /* FEC search mask (all supported codes) */
{0x10, 0x01}, /* Default search inversion, no repeat (default) */
@@ -223,8 +220,9 @@ static struct {
{0x44, 0x00}, /* Constellation (default) */
{0x45, 0x00}, /* Symbol count (default) */
{0x46, 0x0d}, /* Symbol rate estimator on (default) */
- {0x56, 0x41}, /* Various (default) */
+ {0x56, 0xc1}, /* Error Counter = Viterbi BER */
{0x57, 0xff}, /* Error Counter Window (default) */
+ {0x5c, 0x20}, /* Acquisition AFC Expiration window (default is 0x10) */
{0x67, 0x83}, /* Non-DCII symbol clock */
};
@@ -321,6 +319,12 @@ static int cx24123_set_fec(struct cx24123_state* state, fe_code_rate_t fec)
if ( (fec < FEC_NONE) || (fec > FEC_AUTO) )
fec = FEC_AUTO;
+ /* Set the soft decision threshold */
+ if(fec == FEC_1_2)
+ cx24123_writereg(state, 0x43, cx24123_readreg(state, 0x43) | 0x01);
+ else
+ cx24123_writereg(state, 0x43, cx24123_readreg(state, 0x43) & ~0x01);
+
switch (fec) {
case FEC_1_2:
dprintk("%s: set FEC to 1/2\n",__FUNCTION__);
@@ -657,6 +661,10 @@ static int cx24123_initfe(struct dvb_frontend* fe)
for (i = 0; i < sizeof(cx24123_regdata) / sizeof(cx24123_regdata[0]); i++)
cx24123_writereg(state, cx24123_regdata[i].reg, cx24123_regdata[i].data);
+ /* Set the LNB polarity */
+ if(state->config->lnb_polarity)
+ cx24123_writereg(state, 0x32, cx24123_readreg(state, 0x32) | 0x02);
+
return 0;
}
@@ -674,6 +682,9 @@ static int cx24123_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage
case SEC_VOLTAGE_18:
dprintk("%s: setting voltage 18V\n", __FUNCTION__);
return cx24123_writereg(state, 0x29, val | 0x80);
+ case SEC_VOLTAGE_OFF:
+ /* already handled in cx88-dvb */
+ return 0;
default:
return -EINVAL;
};
@@ -776,13 +787,15 @@ static int cx24123_read_status(struct dvb_frontend* fe, fe_status_t* status)
if (lock & 0x01)
*status |= FE_HAS_SIGNAL;
if (sync & 0x02)
- *status |= FE_HAS_CARRIER;
+ *status |= FE_HAS_CARRIER; /* Phase locked */
if (sync & 0x04)
*status |= FE_HAS_VITERBI;
+
+ /* Reed-Solomon Status */
if (sync & 0x08)
*status |= FE_HAS_SYNC;
if (sync & 0x80)
- *status |= FE_HAS_LOCK;
+ *status |= FE_HAS_LOCK; /*Full Sync */
return 0;
}
@@ -795,29 +808,13 @@ static int cx24123_read_ber(struct dvb_frontend* fe, u32* ber)
{
struct cx24123_state *state = fe->demodulator_priv;
- state->lastber =
- ((cx24123_readreg(state, 0x1c) & 0x3f) << 16) |
+ /* The true bit error rate is this value divided by
+ the window size (set as 256 * 255) */
+ *ber = ((cx24123_readreg(state, 0x1c) & 0x3f) << 16) |
(cx24123_readreg(state, 0x1d) << 8 |
- cx24123_readreg(state, 0x1e));
-
- /* Do the signal quality processing here, it's derived from the BER. */
- /* Scale the BER from a 24bit to a SNR 16 bit where higher = better */
- if (state->lastber < 5000)
- state->snr = 655*100;
- else if ( (state->lastber >= 5000) && (state->lastber < 55000) )
- state->snr = 655*90;
- else if ( (state->lastber >= 55000) && (state->lastber < 150000) )
- state->snr = 655*80;
- else if ( (state->lastber >= 150000) && (state->lastber < 250000) )
- state->snr = 655*70;
- else if ( (state->lastber >= 250000) && (state->lastber < 450000) )
- state->snr = 655*65;
- else
- state->snr = 0;
-
- dprintk("%s: BER = %d, S/N index = %d\n",__FUNCTION__,state->lastber, state->snr);
+ cx24123_readreg(state, 0x1e));
- *ber = state->lastber;
+ dprintk("%s: BER = %d\n",__FUNCTION__,*ber);
return 0;
}
@@ -825,6 +822,7 @@ static int cx24123_read_ber(struct dvb_frontend* fe, u32* ber)
static int cx24123_read_signal_strength(struct dvb_frontend* fe, u16* signal_strength)
{
struct cx24123_state *state = fe->demodulator_priv;
+
*signal_strength = cx24123_readreg(state, 0x3b) << 8; /* larger = better */
dprintk("%s: Signal strength = %d\n",__FUNCTION__,*signal_strength);
@@ -835,19 +833,13 @@ static int cx24123_read_signal_strength(struct dvb_frontend* fe, u16* signal_str
static int cx24123_read_snr(struct dvb_frontend* fe, u16* snr)
{
struct cx24123_state *state = fe->demodulator_priv;
- *snr = state->snr;
-
- dprintk("%s: read S/N index = %d\n",__FUNCTION__,*snr);
- return 0;
-}
+ /* Inverted raw Es/N0 count, totally bogus but better than the
+ BER threshold. */
+ *snr = 65535 - (((u16)cx24123_readreg(state, 0x18) << 8) |
+ (u16)cx24123_readreg(state, 0x19));
-static int cx24123_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
-{
- struct cx24123_state *state = fe->demodulator_priv;
- *ucblocks = state->lastber;
-
- dprintk("%s: ucblocks (ber) = %d\n",__FUNCTION__,*ucblocks);
+ dprintk("%s: read S/N index = %d\n",__FUNCTION__,*snr);
return 0;
}
@@ -922,6 +914,29 @@ static int cx24123_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
return 0;
}
+static int cx24123_tune(struct dvb_frontend* fe,
+ struct dvb_frontend_parameters* params,
+ unsigned int mode_flags,
+ int *delay,
+ fe_status_t *status)
+{
+ int retval = 0;
+
+ if (params != NULL)
+ retval = cx24123_set_frontend(fe, params);
+
+ if (!(mode_flags & FE_TUNE_MODE_ONESHOT))
+ cx24123_read_status(fe, status);
+ *delay = HZ/10;
+
+ return retval;
+}
+
+static int cx24123_get_algo(struct dvb_frontend *fe)
+{
+ return 1; //FE_ALGO_HW
+}
+
static void cx24123_release(struct dvb_frontend* fe)
{
struct cx24123_state* state = fe->demodulator_priv;
@@ -949,8 +964,6 @@ struct dvb_frontend* cx24123_attach(const struct cx24123_config* config,
/* setup the state */
state->config = config;
state->i2c = i2c;
- state->lastber = 0;
- state->snr = 0;
state->VCAarg = 0;
state->VGAarg = 0;
state->bandselectarg = 0;
@@ -1003,11 +1016,12 @@ static struct dvb_frontend_ops cx24123_ops = {
.read_ber = cx24123_read_ber,
.read_signal_strength = cx24123_read_signal_strength,
.read_snr = cx24123_read_snr,
- .read_ucblocks = cx24123_read_ucblocks,
.diseqc_send_master_cmd = cx24123_send_diseqc_msg,
.diseqc_send_burst = cx24123_diseqc_send_burst,
.set_tone = cx24123_set_tone,
.set_voltage = cx24123_set_voltage,
+ .tune = cx24123_tune,
+ .get_frontend_algo = cx24123_get_algo,
};
module_param(debug, int, 0644);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-03 01:29:25 +0000