V4L/DVB (13717): [MB86A16] Statistics Updates
* Demodulator status check made reliable * Code simplification for Viterbi Sync check, makes acquisition more reliable * Implement a BER monitor * Implement a Signal strength monitor * Implement a "simple" UCB monitor, no real UCB monitor Signed-off-by: Manu Abraham <manu@linuxtv.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Manu Abraham
Mauro Carvalho Chehab
Родитель
4170368448
Коммит
77557abef0
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@ -36,7 +36,6 @@ struct mb86a16_state {
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struct i2c_adapter *i2c_adap;
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const struct mb86a16_config *config;
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struct dvb_frontend frontend;
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u8 signal;
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// tuning parameters
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int frequency;
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@ -593,17 +592,39 @@ err:
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static int mb86a16_read_status(struct dvb_frontend *fe, fe_status_t *status)
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{
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u8 stat, stat2;
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struct mb86a16_state *state = fe->demodulator_priv;
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*status = 0;
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if (state->signal & 0x02)
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*status |= FE_HAS_VITERBI;
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if (state->signal & 0x01)
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if (mb86a16_read(state, MB86A16_SIG1, &stat) != 2)
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goto err;
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if (mb86a16_read(state, MB86A16_SIG2, &stat2) != 2)
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goto err;
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if ((stat > 25) && (stat2 > 25))
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*status |= FE_HAS_SIGNAL;
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if ((stat > 45) && (stat2 > 45))
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*status |= FE_HAS_CARRIER;
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if (mb86a16_read(state, MB86A16_STATUS, &stat) != 2)
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goto err;
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if (stat & 0x01)
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*status |= FE_HAS_SYNC;
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if (state->signal & 0x03)
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if (stat & 0x01)
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*status |= FE_HAS_VITERBI;
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if (mb86a16_read(state, MB86A16_FRAMESYNC, &stat) != 2)
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goto err;
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if ((stat & 0x0f) && (*status & FE_HAS_VITERBI))
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*status |= FE_HAS_LOCK;
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return 0;
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err:
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dprintk(verbose, MB86A16_ERROR, 1, "I2C transfer error");
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return -EREMOTEIO;
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}
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static int sync_chk(struct mb86a16_state *state,
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@ -1439,10 +1460,6 @@ static int mb86a16_set_fe(struct mb86a16_state *state)
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msleep_interruptible(wait_t);
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sync = sync_chk(state, &VIRM);
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dprintk(verbose, MB86A16_INFO, 1, "-------- Viterbi=[%d] SYNC=[%d] ---------", VIRM, sync);
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if (mb86a16_read(state, 0x0d, &state->signal) != 2) {
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dprintk(verbose, MB86A16_ERROR, 1, "I2C transfer error");
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return -EREMOTEIO;
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}
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if (VIRM) {
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if (VIRM == 4) { // 5/6
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if (SIG1 > 110)
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@ -1459,22 +1476,14 @@ static int mb86a16_set_fe(struct mb86a16_state *state)
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iq_vt_set(state, 1);
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FEC_srst(state);
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}
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if (SIG1 > 110)
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wait_t = ( 786432 + state->srate / 2) / state->srate;
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else
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wait_t = (1572864 + state->srate / 2) / state->srate;
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msleep_interruptible(wait_t);
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SEQ_set(state, 1);
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} else { // 1/2, 2/3, 3/4, 7/8
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if (SIG1 > 110)
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wait_t = ( 786432 + state->srate / 2) / state->srate;
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else
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wait_t = (1572864 + state->srate / 2) / state->srate;
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msleep_interruptible(wait_t);
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SEQ_set(state, 1);
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}
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// 1/2, 2/3, 3/4, 7/8
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if (SIG1 > 110)
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wait_t = ( 786432 + state->srate / 2) / state->srate;
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else
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wait_t = (1572864 + state->srate / 2) / state->srate;
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msleep_interruptible(wait_t);
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SEQ_set(state, 1);
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} else {
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dprintk(verbose, MB86A16_INFO, 1, "NO -- SYNC");
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SEQ_set(state, 1);
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@ -1648,12 +1657,85 @@ static int mb86a16_sleep(struct dvb_frontend *fe)
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static int mb86a16_read_ber(struct dvb_frontend *fe, u32 *ber)
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{
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u8 ber_mon, ber_tab, ber_lsb, ber_mid, ber_msb, ber_tim, ber_rst;
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u32 timer;
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struct mb86a16_state *state = fe->demodulator_priv;
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*ber = 0;
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if (mb86a16_read(state, MB86A16_BERMON, &ber_mon) != 2)
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goto err;
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if (mb86a16_read(state, MB86A16_BERTAB, &ber_tab) != 2)
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goto err;
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if (mb86a16_read(state, MB86A16_BERLSB, &ber_lsb) != 2)
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goto err;
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if (mb86a16_read(state, MB86A16_BERMID, &ber_mid) != 2)
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goto err;
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if (mb86a16_read(state, MB86A16_BERMSB, &ber_msb) != 2)
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goto err;
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/* BER monitor invalid when BER_EN = 0 */
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if (ber_mon & 0x04) {
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/* coarse, fast calculation */
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*ber = ber_tab & 0x1f;
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dprintk(verbose, MB86A16_DEBUG, 1, "BER coarse=[0x%02x]", *ber);
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if (ber_mon & 0x01) {
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/*
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* BER_SEL = 1, The monitored BER is the estimated
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* value with a Reed-Solomon decoder error amount at
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* the deinterleaver output.
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* monitored BER is expressed as a 20 bit output in total
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*/
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ber_rst = ber_mon >> 3;
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*ber = (((ber_msb << 8) | ber_mid) << 8) | ber_lsb;
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if (ber_rst == 0)
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timer = 12500000;
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if (ber_rst == 1)
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timer = 25000000;
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if (ber_rst == 2)
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timer = 50000000;
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if (ber_rst == 3)
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timer = 100000000;
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*ber /= timer;
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dprintk(verbose, MB86A16_DEBUG, 1, "BER fine=[0x%02x]", *ber);
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} else {
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/*
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* BER_SEL = 0, The monitored BER is the estimated
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* value with a Viterbi decoder error amount at the
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* QPSK demodulator output.
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* monitored BER is expressed as a 24 bit output in total
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*/
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ber_tim = ber_mon >> 1;
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*ber = (((ber_msb << 8) | ber_mid) << 8) | ber_lsb;
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if (ber_tim == 0)
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timer = 16;
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if (ber_tim == 1)
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timer = 24;
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*ber /= 2 ^ timer;
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dprintk(verbose, MB86A16_DEBUG, 1, "BER fine=[0x%02x]", *ber);
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}
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}
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return 0;
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err:
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dprintk(verbose, MB86A16_ERROR, 1, "I2C transfer error");
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return -EREMOTEIO;
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}
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static int mb86a16_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
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{
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u8 agcm = 0;
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struct mb86a16_state *state = fe->demodulator_priv;
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*strength = 0;
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if (mb86a16_read(state, MB86A16_AGCM, &agcm) != 2) {
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dprintk(verbose, MB86A16_ERROR, 1, "I2C transfer error");
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return -EREMOTEIO;
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}
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*strength = ((0xff - agcm) * 100) / 256;
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dprintk(verbose, MB86A16_DEBUG, 1, "Signal strength=[%d %%]", (u8) *strength);
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*strength = (0xffff - 0xff) + agcm;
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return 0;
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}
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@ -1708,12 +1790,22 @@ static int mb86a16_read_snr(struct dvb_frontend *fe, u16 *snr)
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}
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q_level = (*snr * 100) / (high_tide - low_tide);
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dprintk(verbose, MB86A16_ERROR, 1, "SNR (Quality) = [%d dB], Level=%d %%", *snr, q_level);
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*snr = (0xffff - 0xff) + *snr;
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return 0;
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}
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static int mb86a16_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
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{
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u8 dist;
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struct mb86a16_state *state = fe->demodulator_priv;
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if (mb86a16_read(state, MB86A16_DISTMON, &dist) != 2) {
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dprintk(verbose, MB86A16_ERROR, 1, "I2C transfer error");
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return -EREMOTEIO;
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}
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*ucblocks = dist;
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return 0;
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}
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@ -1723,7 +1815,7 @@ static struct dvb_frontend_ops mb86a16_ops = {
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.type = FE_QPSK,
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.frequency_min = 950000,
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.frequency_max = 2150000,
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.frequency_stepsize = 125,
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.frequency_stepsize = 3000,
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.frequency_tolerance = 0,
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.symbol_rate_min = 1000000,
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.symbol_rate_max = 45000000,
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