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Commit 83f11619 authored by Antti Palosaari's avatar Antti Palosaari Committed by Mauro Carvalho Chehab
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[media] af9033: implement DVBv5 statistics for signal strength 



Let the demod firmware estimate RF signal strength and return it
to the app as a dBm. To handle that, use thread which reads signal
strengths from firmware in 2 sec intervals when device is active.

Signed-off-by: default avatarAntti Palosaari <crope@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@osg.samsung.com>
parent 249c697e

drivers/media/dvb-frontends/af9033.c

+48 −0
Original line number Diff line number Diff line
@@ -28,13 +28,17 @@ struct af9033_dev { 
	struct i2c_client *client;

	struct dvb_frontend fe;

	struct af9033_config cfg;

	bool is_af9035;

	bool is_it9135;



	u32 bandwidth_hz;

	bool ts_mode_parallel;

	bool ts_mode_serial;



	fe_status_t fe_status;

	u32 ber;

	u32 ucb;

	struct delayed_work stat_work;

	unsigned long last_stat_check;

};
@@ -442,6 +446,8 @@ static int af9033_init(struct dvb_frontend *fe) 
	}



	dev->bandwidth_hz = 0; /* force to program all parameters */

	/* start statistics polling */

	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));



	return 0;
@@ -457,6 +463,9 @@ static int af9033_sleep(struct dvb_frontend *fe) 
	int ret, i;

	u8 tmp;



	/* stop statistics polling */

	cancel_delayed_work_sync(&dev->stat_work);



	ret = af9033_wr_reg(dev, 0x80004c, 1);

	if (ret < 0)

		goto err;
@@ -810,6 +819,8 @@ static int af9033_read_status(struct dvb_frontend *fe, fe_status_t *status) 
					FE_HAS_LOCK;

	}



	dev->fe_status = *status;



	return 0;



err:
@@ -1039,6 +1050,40 @@ static int af9033_pid_filter(struct dvb_frontend *fe, int index, u16 pid, 
	return ret;

}



static void af9033_stat_work(struct work_struct *work)

{

	struct af9033_dev *dev = container_of(work, struct af9033_dev, stat_work.work);

	struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;

	int ret, tmp;

	u8 u8tmp;



	dev_dbg(&dev->client->dev, "\n");



	if (dev->fe_status & FE_HAS_SIGNAL) {

		if (dev->is_af9035) {

			ret = af9033_rd_reg(dev, 0x80004a, &u8tmp);

			tmp = -u8tmp * 1000;

		} else {

			ret = af9033_rd_reg(dev, 0x8000f7, &u8tmp);

			tmp = (u8tmp - 100) * 1000;

		}

		if (ret)

			goto err;



		c->strength.len = 1;

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

		c->strength.stat[0].svalue = tmp;

	} else {

		c->strength.len = 1;

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

	}



	schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));

	return;

err:

	dev_dbg(&dev->client->dev, "failed=%d\n", ret);

}



static struct dvb_frontend_ops af9033_ops = {

	.delsys = { SYS_DVBT },

	.info = {
@@ -1099,6 +1144,7 @@ static int af9033_probe(struct i2c_client *client, 


	/* setup the state */

	dev->client = client;

	INIT_DELAYED_WORK(&dev->stat_work, af9033_stat_work);

	memcpy(&dev->cfg, cfg, sizeof(struct af9033_config));



	if (dev->cfg.clock != 12000000) {
@@ -1117,9 +1163,11 @@ static int af9033_probe(struct i2c_client *client, 
	case AF9033_TUNER_IT9135_60:

	case AF9033_TUNER_IT9135_61:

	case AF9033_TUNER_IT9135_62:

		dev->is_it9135 = true;

		reg = 0x004bfc;

		break;

	default:

		dev->is_af9035 = true;

		reg = 0x0083e9;

		break;

	}