diff options
Diffstat (limited to 'drivers/media/dvb/frontends/rtl2830.c')
| -rw-r--r-- | drivers/media/dvb/frontends/rtl2830.c | 201 |
1 files changed, 198 insertions, 3 deletions
diff --git a/drivers/media/dvb/frontends/rtl2830.c b/drivers/media/dvb/frontends/rtl2830.c index 45196c5b0736..93612ebac519 100644 --- a/drivers/media/dvb/frontends/rtl2830.c +++ b/drivers/media/dvb/frontends/rtl2830.c @@ -374,6 +374,118 @@ err: return ret; } +static int rtl2830_get_frontend(struct dvb_frontend *fe) +{ + struct rtl2830_priv *priv = fe->demodulator_priv; + struct dtv_frontend_properties *c = &fe->dtv_property_cache; + int ret; + u8 buf[3]; + + if (priv->sleeping) + return 0; + + ret = rtl2830_rd_regs(priv, 0x33c, buf, 2); + if (ret) + goto err; + + ret = rtl2830_rd_reg(priv, 0x351, &buf[2]); + if (ret) + goto err; + + dbg("%s: TPS=%02x %02x %02x", __func__, buf[0], buf[1], buf[2]); + + switch ((buf[0] >> 2) & 3) { + case 0: + c->modulation = QPSK; + break; + case 1: + c->modulation = QAM_16; + break; + case 2: + c->modulation = QAM_64; + break; + } + + switch ((buf[2] >> 2) & 1) { + case 0: + c->transmission_mode = TRANSMISSION_MODE_2K; + break; + case 1: + c->transmission_mode = TRANSMISSION_MODE_8K; + } + + switch ((buf[2] >> 0) & 3) { + case 0: + c->guard_interval = GUARD_INTERVAL_1_32; + break; + case 1: + c->guard_interval = GUARD_INTERVAL_1_16; + break; + case 2: + c->guard_interval = GUARD_INTERVAL_1_8; + break; + case 3: + c->guard_interval = GUARD_INTERVAL_1_4; + break; + } + + switch ((buf[0] >> 4) & 7) { + case 0: + c->hierarchy = HIERARCHY_NONE; + break; + case 1: + c->hierarchy = HIERARCHY_1; + break; + case 2: + c->hierarchy = HIERARCHY_2; + break; + case 3: + c->hierarchy = HIERARCHY_4; + break; + } + + switch ((buf[1] >> 3) & 7) { + case 0: + c->code_rate_HP = FEC_1_2; + break; + case 1: + c->code_rate_HP = FEC_2_3; + break; + case 2: + c->code_rate_HP = FEC_3_4; + break; + case 3: + c->code_rate_HP = FEC_5_6; + break; + case 4: + c->code_rate_HP = FEC_7_8; + break; + } + + switch ((buf[1] >> 0) & 7) { + case 0: + c->code_rate_LP = FEC_1_2; + break; + case 1: + c->code_rate_LP = FEC_2_3; + break; + case 2: + c->code_rate_LP = FEC_3_4; + break; + case 3: + c->code_rate_LP = FEC_5_6; + break; + case 4: + c->code_rate_LP = FEC_7_8; + break; + } + + return 0; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; +} + static int rtl2830_read_status(struct dvb_frontend *fe, fe_status_t *status) { struct rtl2830_priv *priv = fe->demodulator_priv; @@ -404,14 +516,72 @@ err: static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr) { - *snr = 0; + struct rtl2830_priv *priv = fe->demodulator_priv; + int ret, hierarchy, constellation; + u8 buf[2], tmp; + u16 tmp16; +#define CONSTELLATION_NUM 3 +#define HIERARCHY_NUM 4 + static const u32 snr_constant[CONSTELLATION_NUM][HIERARCHY_NUM] = { + { 70705899, 70705899, 70705899, 70705899 }, + { 82433173, 82433173, 87483115, 94445660 }, + { 92888734, 92888734, 95487525, 99770748 }, + }; + + if (priv->sleeping) + return 0; + + /* reports SNR in resolution of 0.1 dB */ + + ret = rtl2830_rd_reg(priv, 0x33c, &tmp); + if (ret) + goto err; + + constellation = (tmp >> 2) & 0x03; /* [3:2] */ + if (constellation > CONSTELLATION_NUM - 1) + goto err; + + hierarchy = (tmp >> 4) & 0x07; /* [6:4] */ + if (hierarchy > HIERARCHY_NUM - 1) + goto err; + + ret = rtl2830_rd_regs(priv, 0x40c, buf, 2); + if (ret) + goto err; + + tmp16 = buf[0] << 8 | buf[1]; + + if (tmp16) + *snr = (snr_constant[constellation][hierarchy] - + intlog10(tmp16)) / ((1 << 24) / 100); + else + *snr = 0; + return 0; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; } static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber) { - *ber = 0; + struct rtl2830_priv *priv = fe->demodulator_priv; + int ret; + u8 buf[2]; + + if (priv->sleeping) + return 0; + + ret = rtl2830_rd_regs(priv, 0x34e, buf, 2); + if (ret) + goto err; + + *ber = buf[0] << 8 | buf[1]; + return 0; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; } static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) @@ -422,8 +592,32 @@ static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) static int rtl2830_read_signal_strength(struct dvb_frontend *fe, u16 *strength) { - *strength = 0; + struct rtl2830_priv *priv = fe->demodulator_priv; + int ret; + u8 buf[2]; + u16 if_agc_raw, if_agc; + + if (priv->sleeping) + return 0; + + ret = rtl2830_rd_regs(priv, 0x359, buf, 2); + if (ret) + goto err; + + if_agc_raw = (buf[0] << 8 | buf[1]) & 0x3fff; + + if (if_agc_raw & (1 << 9)) + if_agc = -(~(if_agc_raw - 1) & 0x1ff); + else + if_agc = if_agc_raw; + + *strength = (u8) (55 - if_agc / 182); + *strength |= *strength << 8; + return 0; +err: + dbg("%s: failed=%d", __func__, ret); + return ret; } static struct dvb_frontend_ops rtl2830_ops; @@ -549,6 +743,7 @@ static struct dvb_frontend_ops rtl2830_ops = { .get_tune_settings = rtl2830_get_tune_settings, .set_frontend = rtl2830_set_frontend, + .get_frontend = rtl2830_get_frontend, .read_status = rtl2830_read_status, .read_snr = rtl2830_read_snr, |
