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Commit 2832fd31 authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
Browse files

[media] cxd2820r: dvbv5 statistics for DVB-T 



Implement dvbv5 statistics for DVB-T.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
parent fcd09f65

drivers/media/dvb-frontends/cxd2820r_priv.h

+2 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include "dvb_math.h"

#include "cxd2820r.h"

#include <linux/gpio.h>

#include <linux/math64.h>



struct reg_val_mask {

	u32 reg;
@@ -40,6 +41,7 @@ struct cxd2820r_priv { 
	struct i2c_adapter *i2c;

	struct dvb_frontend fe;

	struct cxd2820r_config cfg;

	u64 post_bit_error;



	bool ber_running;

drivers/media/dvb-frontends/cxd2820r_t.c

+88 −0
Original line number Diff line number Diff line
@@ -351,7 +351,9 @@ int cxd2820r_read_ucblocks_t(struct dvb_frontend *fe, u32 *ucblocks) 
int cxd2820r_read_status_t(struct dvb_frontend *fe, enum fe_status *status)

{

	struct cxd2820r_priv *priv = fe->demodulator_priv;

	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

	int ret;

	unsigned int utmp;

	u8 buf[4];

	*status = 0;
@@ -388,6 +390,92 @@ int cxd2820r_read_status_t(struct dvb_frontend *fe, enum fe_status *status) 


	dev_dbg(&priv->i2c->dev, "%s: lock=%*ph\n", __func__, 4, buf);



	/* Signal strength */

	if (*status & FE_HAS_SIGNAL) {

		unsigned int strength;



		ret = cxd2820r_rd_regs(priv, 0x00026, buf, 2);

		if (ret)

			goto error;



		utmp = buf[0] << 8 | buf[1] << 0;

		utmp = ~utmp & 0x0fff;

		/* Scale value to 0x0000-0xffff */

		strength = utmp << 4 | utmp >> 8;



		c->strength.len = 1;

		c->strength.stat[0].scale = FE_SCALE_RELATIVE;

		c->strength.stat[0].uvalue = strength;

	} else {

		c->strength.len = 1;

		c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

	}



	/* CNR */

	if (*status & FE_HAS_VITERBI) {

		unsigned int cnr;



		ret = cxd2820r_rd_regs(priv, 0x0002c, buf, 2);

		if (ret)

			goto error;



		utmp = buf[0] << 8 | buf[1] << 0;

		if (utmp)

			cnr = div_u64((u64)(intlog10(utmp)

				      - intlog10(32000 - utmp) + 55532585)

				      * 10000, (1 << 24));

		else

			cnr = 0;



		c->cnr.len = 1;

		c->cnr.stat[0].scale = FE_SCALE_DECIBEL;

		c->cnr.stat[0].svalue = cnr;

	} else {

		c->cnr.len = 1;

		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

	}



	/* BER */

	if (*status & FE_HAS_SYNC) {

		unsigned int post_bit_error;

		bool start_ber;



		if (priv->ber_running) {

			ret = cxd2820r_rd_regs(priv, 0x00076, buf, 3);

			if (ret)

				goto error;



			if ((buf[2] >> 7) & 0x01) {

				post_bit_error = buf[2] << 16 | buf[1] << 8 |

						 buf[0] << 0;

				post_bit_error &= 0x0fffff;

				start_ber = true;

			} else {

				post_bit_error = 0;

				start_ber = false;

			}

		} else {

			post_bit_error = 0;

			start_ber = true;

		}



		if (start_ber) {

			ret = cxd2820r_wr_reg(priv, 0x00079, 0x01);

			if (ret)

				goto error;

			priv->ber_running = true;

		}



		priv->post_bit_error += post_bit_error;



		c->post_bit_error.len = 1;

		c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;

		c->post_bit_error.stat[0].uvalue = priv->post_bit_error;

	} else {

		c->post_bit_error.len = 1;

		c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;

	}



	return ret;

error:

	dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);