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path: root/drivers/media/dvb-frontends/mn88473.c
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Diffstat (limited to 'drivers/media/dvb-frontends/mn88473.c')
-rw-r--r--drivers/media/dvb-frontends/mn88473.c225
1 files changed, 194 insertions, 31 deletions
diff --git a/drivers/media/dvb-frontends/mn88473.c b/drivers/media/dvb-frontends/mn88473.c
index 451974a1d7ed..c221c7d2ac3e 100644
--- a/drivers/media/dvb-frontends/mn88473.c
+++ b/drivers/media/dvb-frontends/mn88473.c
@@ -239,62 +239,68 @@ 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;
- unsigned int uitmp;
+ int ret, i, stmp;
+ unsigned int utmp, utmp1, utmp2;
+ u8 buf[5];
if (!dev->active) {
ret = -EAGAIN;
goto err;
}
- *status = 0;
-
+ /* Lock detection */
switch (c->delivery_system) {
case SYS_DVBT:
- ret = regmap_read(dev->regmap[0], 0x62, &uitmp);
+ ret = regmap_read(dev->regmap[0], 0x62, &utmp);
if (ret)
goto err;
- if (!(uitmp & 0xa0)) {
- if ((uitmp & 0x0f) >= 0x09)
+ 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 ((uitmp & 0x0f) >= 0x03)
+ 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, &uitmp);
+ ret = regmap_read(dev->regmap[2], 0x8b, &utmp);
if (ret)
goto err;
- if (!(uitmp & 0x40)) {
- if ((uitmp & 0x0f) >= 0x0d)
+ 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 ((uitmp & 0x0f) >= 0x0a)
+ else if ((utmp & 0x0f) >= 0x0a)
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI;
- else if ((uitmp & 0x0f) >= 0x07)
+ 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, &uitmp);
+ ret = regmap_read(dev->regmap[1], 0x85, &utmp);
if (ret)
goto err;
- if (!(uitmp & 0x40)) {
- ret = regmap_read(dev->regmap[1], 0x89, &uitmp);
+ if (!(utmp & 0x40)) {
+ ret = regmap_read(dev->regmap[1], 0x89, &utmp);
if (ret)
goto err;
- if (uitmp & 0x01)
+ if (utmp & 0x01)
*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
- FE_HAS_VITERBI | FE_HAS_SYNC |
- FE_HAS_LOCK;
+ FE_HAS_VITERBI | FE_HAS_SYNC |
+ FE_HAS_LOCK;
+ } else {
+ *status = 0;
}
break;
default:
@@ -302,6 +308,148 @@ static int mn88473_read_status(struct dvb_frontend *fe, enum fe_status *status)
goto err;
}
+ /* 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;
+ }
+
+ /* 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->strength.stat[0].scale = FE_SCALE_RELATIVE;
+ c->strength.stat[0].uvalue = utmp1;
+ } else {
+ c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ }
+
+ /* CNR */
+ 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;
+
+ 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;
+ }
+
+ 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;
+ }
+
+ 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 {
+ /* 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 {
+ stmp = 0;
+ }
+
+ c->cnr.stat[0].svalue = stmp;
+ c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
+ } 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 = stmp;
+ c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
+ } else {
+ c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ }
+
+ /* BER */
+ 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;
+
+ 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);
+
+ 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->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_bulk_read(dev->regmap[0], 0xdd, buf, 4);
+ if (ret)
+ goto err;
+
+ 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 += utmp1;
+ c->block_count.stat[0].scale = FE_SCALE_COUNTER;
+ c->block_count.stat[0].uvalue += utmp2;
+ } else {
+ 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, "failed=%d\n", ret);
@@ -312,6 +460,7 @@ static int mn88473_init(struct dvb_frontend *fe)
{
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, len, remain;
unsigned int uitmp;
const struct firmware *fw;
@@ -378,6 +527,20 @@ warm:
dev->active = true;
+ /* init stats here to indicate which stats are supported */
+ c->strength.len = 1;
+ c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->cnr.len = 1;
+ c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->post_bit_error.len = 1;
+ c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->post_bit_count.len = 1;
+ c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->block_error.len = 1;
+ c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+ c->block_count.len = 1;
+ c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
+
return 0;
err_release_firmware:
release_firmware(fw);
@@ -485,18 +648,6 @@ static int mn88473_probe(struct i2c_client *client,
goto err_kfree;
}
- /* Check demod answers with correct chip id */
- ret = regmap_read(dev->regmap[0], 0xff, &uitmp);
- if (ret)
- goto err_regmap_0_regmap_exit;
-
- dev_dbg(&client->dev, "chip id=%02x\n", uitmp);
-
- if (uitmp != 0x03) {
- ret = -ENODEV;
- goto err_regmap_0_regmap_exit;
- }
-
/*
* Chip has three I2C addresses for different register banks. Used
* addresses are 0x18, 0x1a and 0x1c. We register two dummy clients,
@@ -533,6 +684,18 @@ static int mn88473_probe(struct i2c_client *client,
}
i2c_set_clientdata(dev->client[2], dev);
+ /* Check demod answers with correct chip id */
+ ret = regmap_read(dev->regmap[2], 0xff, &uitmp);
+ if (ret)
+ goto err_regmap_2_regmap_exit;
+
+ dev_dbg(&client->dev, "chip id=%02x\n", uitmp);
+
+ if (uitmp != 0x03) {
+ ret = -ENODEV;
+ goto err_regmap_2_regmap_exit;
+ }
+
/* Sleep because chip is active by default */
ret = regmap_write(dev->regmap[2], 0x05, 0x3e);
if (ret)
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-22 11:14:09 +0100