[media] m88ds3103: implement DVBv5 BER

Implement DVBv5 BER statistics.
Wrap legacy DVBv3 BER to DVBv5 BER.

Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/dvb-frontends/m88ds3103.c

@@ -305,6 +305,92 @@ static int m88ds3103_read_status(struct dvb_frontend *fe, fe_status_t *status)
 		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 	}
 
+	/* BER */
+	if (priv->fe_status & FE_HAS_LOCK) {
+		unsigned int utmp, post_bit_error, post_bit_count;
+
+		switch (c->delivery_system) {
+		case SYS_DVBS:
+			ret = m88ds3103_wr_reg(priv, 0xf9, 0x04);
+			if (ret)
+				goto err;
+
+			ret = m88ds3103_rd_reg(priv, 0xf8, &u8tmp);
+			if (ret)
+				goto err;
+
+			/* measurement ready? */
+			if (!(u8tmp & 0x10)) {
+				ret = m88ds3103_rd_regs(priv, 0xf6, buf, 2);
+				if (ret)
+					goto err;
+
+				post_bit_error = buf[1] << 8 | buf[0] << 0;
+				post_bit_count = 0x800000;
+				priv->post_bit_error += post_bit_error;
+				priv->post_bit_count += post_bit_count;
+				priv->dvbv3_ber = post_bit_error;
+
+				/* restart measurement */
+				u8tmp |= 0x10;
+				ret = m88ds3103_wr_reg(priv, 0xf8, u8tmp);
+				if (ret)
+					goto err;
+			}
+			break;
+		case SYS_DVBS2:
+			ret = m88ds3103_rd_regs(priv, 0xd5, buf, 3);
+			if (ret)
+				goto err;
+
+			utmp = buf[2] << 16 | buf[1] << 8 | buf[0] << 0;
+
+			/* enough data? */
+			if (utmp > 4000) {
+				ret = m88ds3103_rd_regs(priv, 0xf7, buf, 2);
+				if (ret)
+					goto err;
+
+				post_bit_error = buf[1] << 8 | buf[0] << 0;
+				post_bit_count = 32 * utmp; /* TODO: FEC */
+				priv->post_bit_error += post_bit_error;
+				priv->post_bit_count += post_bit_count;
+				priv->dvbv3_ber = post_bit_error;
+
+				/* restart measurement */
+				ret = m88ds3103_wr_reg(priv, 0xd1, 0x01);
+				if (ret)
+					goto err;
+
+				ret = m88ds3103_wr_reg(priv, 0xf9, 0x01);
+				if (ret)
+					goto err;
+
+				ret = m88ds3103_wr_reg(priv, 0xf9, 0x00);
+				if (ret)
+					goto err;
+
+				ret = m88ds3103_wr_reg(priv, 0xd1, 0x00);
+				if (ret)
+					goto err;
+			}
+			break;
+		default:
+			dev_dbg(&priv->i2c->dev,
+				"%s: invalid delivery_system\n", __func__);
+			ret = -EINVAL;
+			goto err;
+		}
+
+		c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
+		c->post_bit_error.stat[0].uvalue = priv->post_bit_error;
+		c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
+		c->post_bit_count.stat[0].uvalue = priv->post_bit_count;
+	} 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(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
@@ -760,6 +846,10 @@ skip_fw_download:
 	/* init stats here in order signal app which stats are supported */
 	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;
 	return 0;
 
 error_fw_release:
@@ -997,83 +1087,10 @@ static int m88ds3103_read_snr(struct dvb_frontend *fe, u16 *snr)
 static int m88ds3103_read_ber(struct dvb_frontend *fe, u32 *ber)
 {
 	struct m88ds3103_priv *priv = fe->demodulator_priv;
-	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
-	int ret;
-	unsigned int utmp;
-	u8 buf[3], u8tmp;
 
-	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
-
-	switch (c->delivery_system) {
-	case SYS_DVBS:
-		ret = m88ds3103_wr_reg(priv, 0xf9, 0x04);
-		if (ret)
-			goto err;
-
-		ret = m88ds3103_rd_reg(priv, 0xf8, &u8tmp);
-		if (ret)
-			goto err;
-
-		if (!(u8tmp & 0x10)) {
-			u8tmp |= 0x10;
-
-			ret = m88ds3103_rd_regs(priv, 0xf6, buf, 2);
-			if (ret)
-				goto err;
-
-			priv->ber = (buf[1] << 8) | (buf[0] << 0);
-
-			/* restart counters */
-			ret = m88ds3103_wr_reg(priv, 0xf8, u8tmp);
-			if (ret)
-				goto err;
-		}
-		break;
-	case SYS_DVBS2:
-		ret = m88ds3103_rd_regs(priv, 0xd5, buf, 3);
-		if (ret)
-			goto err;
-
-		utmp = (buf[2] << 16) | (buf[1] << 8) | (buf[0] << 0);
-
-		if (utmp > 3000) {
-			ret = m88ds3103_rd_regs(priv, 0xf7, buf, 2);
-			if (ret)
-				goto err;
-
-			priv->ber = (buf[1] << 8) | (buf[0] << 0);
-
-			/* restart counters */
-			ret = m88ds3103_wr_reg(priv, 0xd1, 0x01);
-			if (ret)
-				goto err;
-
-			ret = m88ds3103_wr_reg(priv, 0xf9, 0x01);
-			if (ret)
-				goto err;
-
-			ret = m88ds3103_wr_reg(priv, 0xf9, 0x00);
-			if (ret)
-				goto err;
-
-			ret = m88ds3103_wr_reg(priv, 0xd1, 0x00);
-			if (ret)
-				goto err;
-		}
-		break;
-	default:
-		dev_dbg(&priv->i2c->dev, "%s: invalid delivery_system\n",
-				__func__);
-		ret = -EINVAL;
-		goto err;
-	}
-
-	*ber = priv->ber;
+	*ber = priv->dvbv3_ber;
 
 	return 0;
-err:
-	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
-	return ret;
 }
 
 static int m88ds3103_set_tone(struct dvb_frontend *fe,

drivers/media/dvb-frontends/m88ds3103_priv.h

@@ -38,13 +38,15 @@ struct m88ds3103_priv {
 	struct dvb_frontend fe;
 	fe_delivery_system_t delivery_system;
 	fe_status_t fe_status;
-	u32 ber;
+	u32 dvbv3_ber; /* for old DVBv3 API read_ber */
 	bool warm; /* FW running */
 	struct i2c_adapter *i2c_adapter;
 	/* auto detect chip id to do different config */
 	u8 chip_id;
 	/* main mclk is calculated for M88RS6000 dynamically */
 	u32 mclk_khz;
+	u64 post_bit_error;
+	u64 post_bit_count;
 };
 
 struct m88ds3103_reg_val {