diff options
author | Antti Palosaari <crope@iki.fi> | 2016-11-13 05:25:54 -0200 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-11-22 16:04:30 -0200 |
commit | 69ace6ee3e3d088c6c8bd4aab42001fc6ba9d701 (patch) | |
tree | b9b23b732936b4ea9e108b531af4273688ed6a85 /drivers/media | |
parent | 61393b0732fadc1efb2682c92062a54ff9f8fe0b (diff) | |
download | linux-69ace6ee3e3d088c6c8bd4aab42001fc6ba9d701.tar.gz linux-69ace6ee3e3d088c6c8bd4aab42001fc6ba9d701.tar.bz2 linux-69ace6ee3e3d088c6c8bd4aab42001fc6ba9d701.zip |
[media] mn88473: refactor and fix statistics
Remove DVB-T2 BER as it does not work at all and I didn't find
how to fix.
Fix DVB-T and DVB-C BER. It seems to return new some realistic
looking values.
Use (1 << 24) base for CNR calculations to keep it in line with
dvb logarithm functions.
Move all statistic logic to mn88473_read_status() function.
Use regmap_bulk_read() for reading multiple registers as a one go.
Many more and less minor changes.
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'drivers/media')
-rw-r--r-- | drivers/media/dvb-frontends/mn88473.c | 560 | ||||
-rw-r--r-- | drivers/media/dvb-frontends/mn88473_priv.h | 1 |
2 files changed, 161 insertions, 400 deletions
diff --git a/drivers/media/dvb-frontends/mn88473.c b/drivers/media/dvb-frontends/mn88473.c index c8dc9d381201..f3b59a5827d9 100644 --- a/drivers/media/dvb-frontends/mn88473.c +++ b/drivers/media/dvb-frontends/mn88473.c @@ -234,465 +234,225 @@ err: return ret; } -static int mn88473_update_ber_stat_t_c(struct dvb_frontend *fe, - enum fe_status *status) +static int mn88473_read_status(struct dvb_frontend *fe, enum fe_status *status) { struct i2c_client *client = fe->demodulator_priv; struct mn88473_dev *dev = i2c_get_clientdata(client); struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int ret; - u64 total; - unsigned int uitmp, value, errors; - - if (*status & FE_HAS_LOCK) { - ret = regmap_read(dev->regmap[0], 0x5b, &value); - if (ret) - goto err; - - ret = regmap_read(dev->regmap[0], 0xdf, &uitmp); - if (ret) - goto err; - - value &= uitmp; - ret = regmap_write(dev->regmap[0], 0x5b, value); - if (ret) - goto err; - - ret = regmap_read(dev->regmap[0], 0x60, &value); - if (ret) - goto err; - - value &= 0xf0; - value |= 0x5; - ret = regmap_write(dev->regmap[0], 0x60, value); - if (ret) - goto err; - - ret = regmap_read(dev->regmap[0], 0x92, &uitmp); - if (ret) - goto err; - - errors = uitmp << 16; - - ret = regmap_read(dev->regmap[0], 0x93, &uitmp); - if (ret) - goto err; - - errors |= uitmp << 8; - - ret = regmap_read(dev->regmap[0], 0x94, &uitmp); - if (ret) - goto err; - - errors |= uitmp; - - ret = regmap_read(dev->regmap[0], 0x95, &uitmp); - if (ret) - goto err; - - total = uitmp << 8; + int ret, i, stmp; + unsigned int utmp, utmp1, utmp2; + u8 buf[5]; - ret = regmap_read(dev->regmap[0], 0x96, &uitmp); - if (ret) - goto err; - - total |= uitmp; - - /* probably: (bytes -> bit) * (sizeof(TS packet) - 1) */ - total *= 8 * 203; - - c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; - c->post_bit_error.stat[0].uvalue += errors; - c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; - c->post_bit_count.stat[0].uvalue += total; - } else { - c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; - c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + if (!dev->active) { + ret = -EAGAIN; + goto err; } - return 0; - -err: - dev_dbg(&client->dev, "%s failed=%d\n", __func__, ret); - return ret; -} - -static int mn88473_update_ber_stat_t2(struct dvb_frontend *fe, - enum fe_status *status) -{ - struct i2c_client *client = fe->demodulator_priv; - struct mn88473_dev *dev = i2c_get_clientdata(client); - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int ret; - u64 total; - unsigned int uitmp, value, berlen, fec_type_m, errors; - static u16 fec_type_m_tbl0[] = { - 32400, 38880, 43200, 48600, 51840, 54000, 0 - }; - static u16 fec_type_m_tbl1[] = { - 28800, 38880, 43200, 47520, 50400, 53280, 0 - }; - - if (*status & FE_HAS_LOCK) { - ret = regmap_read(dev->regmap[2], 0x82, &value); - if (ret) - goto err; - - value |= 0x20; - value &= 0xef; - ret = regmap_write(dev->regmap[2], 0x82, value); - if (ret) - goto err; - - ret = regmap_read(dev->regmap[2], 0xba, &uitmp); - if (ret) - goto err; - - errors = uitmp << 16; - - ret = regmap_read(dev->regmap[2], 0xbb, &uitmp); - if (ret) - goto err; - - errors |= uitmp << 8; - - ret = regmap_read(dev->regmap[2], 0xbc, &uitmp); - if (ret) - goto err; - - errors |= uitmp; - - ret = regmap_read(dev->regmap[2], 0x83, &berlen); + /* Lock detection */ + switch (c->delivery_system) { + case SYS_DVBT: + ret = regmap_read(dev->regmap[0], 0x62, &utmp); if (ret) goto err; - ret = regmap_write(dev->regmap[2], 0xc0, 0x3); + if (!(utmp & 0xa0)) { + if ((utmp & 0x0f) >= 0x09) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI | FE_HAS_SYNC | + FE_HAS_LOCK; + else if ((utmp & 0x0f) >= 0x03) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER; + } else { + *status = 0; + } + break; + case SYS_DVBT2: + ret = regmap_read(dev->regmap[2], 0x8b, &utmp); + if (ret) + goto err; + + if (!(utmp & 0x40)) { + if ((utmp & 0x0f) >= 0x0d) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI | FE_HAS_SYNC | + FE_HAS_LOCK; + else if ((utmp & 0x0f) >= 0x0a) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI; + else if ((utmp & 0x0f) >= 0x07) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER; + } else { + *status = 0; + } + break; + case SYS_DVBC_ANNEX_A: + ret = regmap_read(dev->regmap[1], 0x85, &utmp); if (ret) goto err; - /* berlen[4:2] are the index in fec_type_m_tbl */ - uitmp = (berlen >> 2) & 0x7; - - if (BIT(0) & berlen) - fec_type_m = fec_type_m_tbl0[uitmp]; - else - fec_type_m = fec_type_m_tbl1[uitmp]; - - total = ((berlen & 0xff) << 1) * fec_type_m; - - c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; - c->post_bit_error.stat[0].uvalue += errors; - c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; - c->post_bit_count.stat[0].uvalue += total; - } else { - c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; - c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; - } - - return 0; - -err: - dev_dbg(&client->dev, "%s failed=%d\n", __func__, ret); - return ret; -} - -static inline u32 log10times1000(u32 value) -{ - return (1000L * intlog10(value)) >> 24; -} - -static int mn88473_read_status_t(struct dvb_frontend *fe, - enum fe_status *status) -{ - struct i2c_client *client = fe->demodulator_priv; - struct mn88473_dev *dev = i2c_get_clientdata(client); - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int ret; - s32 cnr; - unsigned int uitmp, tmp_upper, tmp_lower; + if (!(utmp & 0x40)) { + ret = regmap_read(dev->regmap[1], 0x89, &utmp); + if (ret) + goto err; - ret = regmap_read(dev->regmap[0], 0x62, &uitmp); - if (ret) + if (utmp & 0x01) + *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | + FE_HAS_VITERBI | FE_HAS_SYNC | + FE_HAS_LOCK; + } else { + *status = 0; + } + break; + default: + ret = -EINVAL; goto err; - - if (!(uitmp & 0xa0)) { - if ((uitmp & 0x0f) >= 0x09) - *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | - FE_HAS_VITERBI | FE_HAS_SYNC | - FE_HAS_LOCK; - else if ((uitmp & 0x0f) >= 0x03) - *status = FE_HAS_SIGNAL | FE_HAS_CARRIER; } - /* CNR */ - if (*status & FE_HAS_VITERBI) { - ret = regmap_read(dev->regmap[0], 0x8f, &tmp_upper); - if (ret) - goto err; - - ret = regmap_read(dev->regmap[0], 0x90, &tmp_lower); - if (ret) - goto err; - - uitmp = (tmp_upper << 8) | tmp_lower; - if (uitmp) { - cnr = log10times1000(65536); - cnr -= log10times1000(uitmp); - cnr += 200; - } else - cnr = 0; + /* Signal strength */ + if (*status & FE_HAS_SIGNAL) { + for (i = 0; i < 2; i++) { + ret = regmap_bulk_read(dev->regmap[2], 0x86 + i, + &buf[i], 1); + if (ret) + goto err; + } - if (cnr < 0) - cnr = 0; + /* AGCRD[15:6] gives us a 10bit value ([5:0] are always 0) */ + utmp1 = buf[0] << 8 | buf[1] << 0 | buf[0] >> 2; + dev_dbg(&client->dev, "strength=%u\n", utmp1); - c->cnr.stat[0].svalue = cnr * 10; - c->cnr.stat[0].scale = FE_SCALE_DECIBEL; + c->strength.stat[0].scale = FE_SCALE_RELATIVE; + c->strength.stat[0].uvalue = utmp1; } else { - c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; - } - - /* BER */ - ret = mn88473_update_ber_stat_t_c(fe, status); - if (ret) - goto err; - - return 0; - -err: - dev_dbg(&client->dev, "%s failed=%d\n", __func__, ret); - return ret; -} - -static int mn88473_read_status_t2(struct dvb_frontend *fe, - enum fe_status *status) -{ - struct i2c_client *client = fe->demodulator_priv; - struct mn88473_dev *dev = i2c_get_clientdata(client); - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int ret; - s32 cnr; - unsigned int uitmp, tmp_upper, tmp_lower, flag; - - ret = regmap_read(dev->regmap[2], 0x8b, &uitmp); - if (ret) - goto err; - - if (!(uitmp & 0x40)) { - if ((uitmp & 0x0f) >= 0x0d) - *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | - FE_HAS_VITERBI | FE_HAS_SYNC | - FE_HAS_LOCK; - else if ((uitmp & 0x0f) >= 0x0a) - *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | - FE_HAS_VITERBI; - else if ((uitmp & 0x0f) >= 0x07) - *status = FE_HAS_SIGNAL | FE_HAS_CARRIER; + c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; } /* CNR */ - if (*status & FE_HAS_VITERBI) { - ret = regmap_read(dev->regmap[2], 0xb7, &flag); + if (*status & FE_HAS_VITERBI && c->delivery_system == SYS_DVBT) { + /* DVB-T CNR */ + ret = regmap_bulk_read(dev->regmap[0], 0x8f, buf, 2); if (ret) goto err; - ret = regmap_read(dev->regmap[2], 0xb8, &tmp_upper); - if (ret) - goto err; + utmp = buf[0] << 8 | buf[1] << 0; + if (utmp) { + /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */ + /* log10(65536) = 80807124, 0.2 = 3355443 */ + stmp = div_u64(((u64)80807124 - intlog10(utmp) + + 3355443) * 10000, 1 << 24); + dev_dbg(&client->dev, "cnr=%d value=%u\n", stmp, utmp); + } else { + stmp = 0; + } - ret = regmap_read(dev->regmap[2], 0xb9, &tmp_lower); - if (ret) - goto err; + c->cnr.stat[0].svalue = stmp; + c->cnr.stat[0].scale = FE_SCALE_DECIBEL; + } else if (*status & FE_HAS_VITERBI && + c->delivery_system == SYS_DVBT2) { + /* DVB-T2 CNR */ + for (i = 0; i < 3; i++) { + ret = regmap_bulk_read(dev->regmap[2], 0xb7 + i, + &buf[i], 1); + if (ret) + goto err; + } - uitmp = (tmp_upper << 8) | tmp_lower; - if (uitmp) { - if (flag & BIT(2)) { - /* MISO */ - cnr = log10times1000(16384); - cnr -= log10times1000(uitmp); - cnr -= 600; + utmp = buf[1] << 8 | buf[2] << 0; + utmp1 = (buf[0] >> 2) & 0x01; /* 0=SISO, 1=MISO */ + if (utmp) { + if (utmp1) { + /* CNR[dB]: 10 * (log10(16384 / value) - 0.6) */ + /* log10(16384) = 70706234, 0.6 = 10066330 */ + stmp = div_u64(((u64)70706234 - intlog10(utmp) + - 10066330) * 10000, 1 << 24); + dev_dbg(&client->dev, "cnr=%d value=%u MISO\n", + stmp, utmp); } else { - /* SISO */ - cnr = log10times1000(65536); - cnr -= log10times1000(uitmp); - cnr += 200; + /* CNR[dB]: 10 * (log10(65536 / value) + 0.2) */ + /* log10(65536) = 80807124, 0.2 = 3355443 */ + stmp = div_u64(((u64)80807124 - intlog10(utmp) + + 3355443) * 10000, 1 << 24); + dev_dbg(&client->dev, "cnr=%d value=%u SISO\n", + stmp, utmp); } - } else - cnr = 0; - - if (cnr < 0) - cnr = 0; + } else { + stmp = 0; + } - c->cnr.stat[0].svalue = cnr * 10; + c->cnr.stat[0].svalue = stmp; c->cnr.stat[0].scale = FE_SCALE_DECIBEL; - } else { - c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; - } - - /* BER */ - ret = mn88473_update_ber_stat_t2(fe, status); - if (ret) - goto err; - - return 0; - -err: - dev_dbg(&client->dev, "%s failed=%d\n", __func__, ret); - return ret; -} - -static int mn88473_read_status_c(struct dvb_frontend *fe, - enum fe_status *status) -{ - struct i2c_client *client = fe->demodulator_priv; - struct mn88473_dev *dev = i2c_get_clientdata(client); - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int ret; - unsigned int uitmp, tmp_upper, tmp_lower, signal, noise; - - ret = regmap_read(dev->regmap[1], 0x85, &uitmp); - if (ret) - goto err; - - if (!(uitmp & 0x40)) { - ret = regmap_read(dev->regmap[1], 0x89, &uitmp); - if (ret) - goto err; - - if (uitmp & 0x01) - *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | - FE_HAS_VITERBI | FE_HAS_SYNC | - FE_HAS_LOCK; - } - - /* CNR */ - if (*status & FE_HAS_VITERBI) { - ret = regmap_read(dev->regmap[1], 0xa1, &tmp_upper); - if (ret) - goto err; - - ret = regmap_read(dev->regmap[1], 0xa2, &tmp_lower); - if (ret) - goto err; - - signal = (tmp_upper << 8) | tmp_lower; - - ret = regmap_read(dev->regmap[1], 0xa3, &tmp_upper); - if (ret) - goto err; - - ret = regmap_read(dev->regmap[1], 0xa4, &tmp_lower); - if (ret) - goto err; - - noise = (tmp_upper << 8) | tmp_lower; - if (noise) - uitmp = log10times1000(signal * 8 / noise); - else - uitmp = 0; + } else if (*status & FE_HAS_VITERBI && + c->delivery_system == SYS_DVBC_ANNEX_A) { + /* DVB-C CNR */ + ret = regmap_bulk_read(dev->regmap[1], 0xa1, buf, 4); + if (ret) + goto err; + + utmp1 = buf[0] << 8 | buf[1] << 0; /* signal */ + utmp2 = buf[2] << 8 | buf[3] << 0; /* noise */ + if (utmp1 && utmp2) { + /* CNR[dB]: 10 * log10(8 * (signal / noise)) */ + /* log10(8) = 15151336 */ + stmp = div_u64(((u64)15151336 + intlog10(utmp1) + - intlog10(utmp2)) * 10000, 1 << 24); + dev_dbg(&client->dev, "cnr=%d signal=%u noise=%u\n", + stmp, utmp1, utmp2); + } else { + stmp = 0; + } - c->cnr.stat[0].svalue = uitmp * 10; + c->cnr.stat[0].svalue = stmp; c->cnr.stat[0].scale = FE_SCALE_DECIBEL; } else { c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; } /* BER */ - ret = mn88473_update_ber_stat_t_c(fe, status); - if (ret) - goto err; - - return 0; - -err: - dev_dbg(&client->dev, "%s failed=%d\n", __func__, ret); - return ret; -} - -static int mn88473_read_status(struct dvb_frontend *fe, enum fe_status *status) -{ - struct i2c_client *client = fe->demodulator_priv; - struct mn88473_dev *dev = i2c_get_clientdata(client); - struct dtv_frontend_properties *c = &fe->dtv_property_cache; - int ret; - u16 errors, per_len; - unsigned int upper, lower; - - if (!dev->active) { - ret = -EAGAIN; - goto err; - } - - *status = 0; - - switch (c->delivery_system) { - case SYS_DVBT: - ret = mn88473_read_status_t(fe, status); - break; - case SYS_DVBT2: - ret = mn88473_read_status_t2(fe, status); - break; - case SYS_DVBC_ANNEX_A: - ret = mn88473_read_status_c(fe, status); - break; - default: - ret = -EINVAL; - break; - } - - if (ret) - goto err; - - /* signal strength, derived from AGC */ - if (*status & FE_HAS_SIGNAL) { - ret = regmap_read(dev->regmap[2], 0x86, &upper); + if (*status & FE_HAS_LOCK && (c->delivery_system == SYS_DVBT || + c->delivery_system == SYS_DVBC_ANNEX_A)) { + /* DVB-T & DVB-C BER */ + ret = regmap_bulk_read(dev->regmap[0], 0x92, buf, 5); if (ret) goto err; - ret = regmap_read(dev->regmap[2], 0x87, &lower); - if (ret) - goto err; + utmp1 = buf[0] << 16 | buf[1] << 8 | buf[2] << 0; + utmp2 = buf[3] << 8 | buf[4] << 0; + utmp2 = utmp2 * 8 * 204; + dev_dbg(&client->dev, "post_bit_error=%u post_bit_count=%u\n", + utmp1, utmp2); - /* AGCRD[15:6] gives us a 10bit value ([5:0] are always 0) */ - c->strength.stat[0].scale = FE_SCALE_RELATIVE; - c->strength.stat[0].uvalue = (upper << 8) | lower; + c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; + c->post_bit_error.stat[0].uvalue += utmp1; + c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; + c->post_bit_count.stat[0].uvalue += utmp2; } else { - c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; } /* PER */ if (*status & FE_HAS_LOCK) { - ret = regmap_read(dev->regmap[0], 0xdd, &upper); - if (ret) - goto err; - - ret = regmap_read(dev->regmap[0], 0xde, &lower); - if (ret) - goto err; - - errors = (upper << 8) | lower; - - ret = regmap_read(dev->regmap[0], 0xdf, &upper); - if (ret) - goto err; - - ret = regmap_read(dev->regmap[0], 0xe0, &lower); + ret = regmap_bulk_read(dev->regmap[0], 0xdd, buf, 4); if (ret) goto err; - per_len = (upper << 8) | lower; + utmp1 = buf[0] << 8 | buf[1] << 0; + utmp2 = buf[2] << 8 | buf[3] << 0; + dev_dbg(&client->dev, "block_error=%u block_count=%u\n", + utmp1, utmp2); c->block_error.stat[0].scale = FE_SCALE_COUNTER; - c->block_error.stat[0].uvalue += errors; + c->block_error.stat[0].uvalue += utmp1; c->block_count.stat[0].scale = FE_SCALE_COUNTER; - c->block_count.stat[0].uvalue += per_len; + c->block_count.stat[0].uvalue += utmp2; } else { - c->block_error.stat[0].scale = FE_SCALE_COUNTER; - c->block_count.stat[0].scale = FE_SCALE_COUNTER; + c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; + c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; } return 0; err: - dev_dbg(&client->dev, "%s failed=%d\n", __func__, ret); + dev_dbg(&client->dev, "failed=%d\n", ret); return ret; } diff --git a/drivers/media/dvb-frontends/mn88473_priv.h b/drivers/media/dvb-frontends/mn88473_priv.h index 7cbef7b7fb39..5fc463d147c8 100644 --- a/drivers/media/dvb-frontends/mn88473_priv.h +++ b/drivers/media/dvb-frontends/mn88473_priv.h @@ -20,6 +20,7 @@ #include "dvb_frontend.h" #include "dvb_math.h" #include "mn88473.h" +#include <linux/math64.h> #include <linux/firmware.h> #include <linux/regmap.h> |