1 files changed, 331 insertions, 0 deletions
diff --git a/drivers/media/dvb-frontends/cxd2820r_c.c b/drivers/media/dvb-frontends/cxd2820r_c.c
new file mode 100644
index 0000000000..0ba382948c
--- /dev/null
+++ b/drivers/media/dvb-frontends/cxd2820r_c.c
@@ -0,0 +1,331 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Sony CXD2820R demodulator driver
+ *
+ * Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
+ */
+
+
+#include "cxd2820r_priv.h"
+
+int cxd2820r_set_frontend_c(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+	unsigned int utmp;
+	u8 buf[2];
+	u32 if_frequency;
+	struct reg_val_mask tab[] = {
+		{ 0x00080, 0x01, 0xff },
+		{ 0x00081, 0x05, 0xff },
+		{ 0x00085, 0x07, 0xff },
+		{ 0x00088, 0x01, 0xff },
+
+		{ 0x00082, 0x20, 0x60 },
+		{ 0x1016a, 0x48, 0xff },
+		{ 0x100a5, 0x00, 0x01 },
+		{ 0x10020, 0x06, 0x07 },
+		{ 0x10059, 0x50, 0xff },
+		{ 0x10087, 0x0c, 0x3c },
+		{ 0x1008b, 0x07, 0xff },
+		{ 0x1001f, priv->if_agc_polarity << 7, 0x80 },
+		{ 0x10070, priv->ts_mode, 0xff },
+		{ 0x10071, !priv->ts_clk_inv << 4, 0x10 },
+	};
+
+	dev_dbg(&client->dev,
+		"delivery_system=%d modulation=%d frequency=%u symbol_rate=%u inversion=%d\n",
+		c->delivery_system, c->modulation, c->frequency,
+		c->symbol_rate, c->inversion);
+
+	/* program tuner */
+	if (fe->ops.tuner_ops.set_params)
+		fe->ops.tuner_ops.set_params(fe);
+
+	if (priv->delivery_system !=  SYS_DVBC_ANNEX_A) {
+		ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
+		if (ret)
+			goto error;
+	}
+
+	priv->delivery_system = SYS_DVBC_ANNEX_A;
+	priv->ber_running = false; /* tune stops BER counter */
+
+	/* program IF frequency */
+	if (fe->ops.tuner_ops.get_if_frequency) {
+		ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
+		if (ret)
+			goto error;
+		dev_dbg(&client->dev, "if_frequency=%u\n", if_frequency);
+	} else {
+		ret = -EINVAL;
+		goto error;
+	}
+
+	utmp = 0x4000 - DIV_ROUND_CLOSEST_ULL((u64)if_frequency * 0x4000, CXD2820R_CLK);
+	buf[0] = (utmp >> 8) & 0xff;
+	buf[1] = (utmp >> 0) & 0xff;
+	ret = regmap_bulk_write(priv->regmap[1], 0x0042, buf, 2);
+	if (ret)
+		goto error;
+
+	ret = regmap_write(priv->regmap[0], 0x00ff, 0x08);
+	if (ret)
+		goto error;
+
+	ret = regmap_write(priv->regmap[0], 0x00fe, 0x01);
+	if (ret)
+		goto error;
+
+	return ret;
+error:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+int cxd2820r_get_frontend_c(struct dvb_frontend *fe,
+			    struct dtv_frontend_properties *c)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	int ret;
+	unsigned int utmp;
+	u8 buf[2];
+
+	dev_dbg(&client->dev, "\n");
+
+	ret = regmap_bulk_read(priv->regmap[1], 0x001a, buf, 2);
+	if (ret)
+		goto error;
+
+	c->symbol_rate = 2500 * ((buf[0] & 0x0f) << 8 | buf[1]);
+
+	ret = regmap_read(priv->regmap[1], 0x0019, &utmp);
+	if (ret)
+		goto error;
+
+	switch ((utmp >> 0) & 0x07) {
+	case 0:
+		c->modulation = QAM_16;
+		break;
+	case 1:
+		c->modulation = QAM_32;
+		break;
+	case 2:
+		c->modulation = QAM_64;
+		break;
+	case 3:
+		c->modulation = QAM_128;
+		break;
+	case 4:
+		c->modulation = QAM_256;
+		break;
+	}
+
+	switch ((utmp >> 7) & 0x01) {
+	case 0:
+		c->inversion = INVERSION_OFF;
+		break;
+	case 1:
+		c->inversion = INVERSION_ON;
+		break;
+	}
+
+	return ret;
+error:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+int cxd2820r_read_status_c(struct dvb_frontend *fe, enum fe_status *status)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+	unsigned int utmp, utmp1, utmp2;
+	u8 buf[3];
+
+	/* Lock detection */
+	ret = regmap_bulk_read(priv->regmap[1], 0x0088, &buf[0], 1);
+	if (ret)
+		goto error;
+	ret = regmap_bulk_read(priv->regmap[1], 0x0073, &buf[1], 1);
+	if (ret)
+		goto error;
+
+	utmp1 = (buf[0] >> 0) & 0x01;
+	utmp2 = (buf[1] >> 3) & 0x01;
+
+	if (utmp1 == 1 && utmp2 == 1) {
+		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
+			  FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
+	} else if (utmp1 == 1 || utmp2 == 1) {
+		*status = FE_HAS_SIGNAL | FE_HAS_CARRIER |
+			  FE_HAS_VITERBI | FE_HAS_SYNC;
+	} else {
+		*status = 0;
+	}
+
+	dev_dbg(&client->dev, "status=%02x raw=%*ph sync=%u ts=%u\n",
+		*status, 2, buf, utmp1, utmp2);
+
+	/* Signal strength */
+	if (*status & FE_HAS_SIGNAL) {
+		unsigned int strength;
+
+		ret = regmap_bulk_read(priv->regmap[1], 0x0049, buf, 2);
+		if (ret)
+			goto error;
+
+		utmp = buf[0] << 8 | buf[1] << 0;
+		utmp = 511 - sign_extend32(utmp, 9);
+		/* Scale value to 0x0000-0xffff */
+		strength = utmp << 6 | utmp >> 4;
+
+		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, const_a, const_b;
+
+		ret = regmap_read(priv->regmap[1], 0x0019, &utmp);
+		if (ret)
+			goto error;
+
+		if (((utmp >> 0) & 0x03) % 2) {
+			const_a = 8750;
+			const_b = 650;
+		} else {
+			const_a = 9500;
+			const_b = 760;
+		}
+
+		ret = regmap_read(priv->regmap[1], 0x004d, &utmp);
+		if (ret)
+			goto error;
+
+		#define CXD2820R_LOG2_E_24 24204406 /* log2(e) << 24 */
+		if (utmp)
+			cnr = div_u64((u64)(intlog2(const_b) - intlog2(utmp))
+				      * const_a, CXD2820R_LOG2_E_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 = regmap_bulk_read(priv->regmap[1], 0x0076, 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 = regmap_write(priv->regmap[1], 0x0079, 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(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+int cxd2820r_init_c(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	int ret;
+
+	dev_dbg(&client->dev, "\n");
+
+	ret = regmap_write(priv->regmap[0], 0x0085, 0x07);
+	if (ret)
+		goto error;
+
+	return ret;
+error:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+int cxd2820r_sleep_c(struct dvb_frontend *fe)
+{
+	struct cxd2820r_priv *priv = fe->demodulator_priv;
+	struct i2c_client *client = priv->client[0];
+	int ret;
+	static const struct reg_val_mask tab[] = {
+		{ 0x000ff, 0x1f, 0xff },
+		{ 0x00085, 0x00, 0xff },
+		{ 0x00088, 0x01, 0xff },
+		{ 0x00081, 0x00, 0xff },
+		{ 0x00080, 0x00, 0xff },
+	};
+
+	dev_dbg(&client->dev, "\n");
+
+	priv->delivery_system = SYS_UNDEFINED;
+
+	ret = cxd2820r_wr_reg_val_mask_tab(priv, tab, ARRAY_SIZE(tab));
+	if (ret)
+		goto error;
+
+	return ret;
+error:
+	dev_dbg(&client->dev, "failed=%d\n", ret);
+	return ret;
+}
+
+int cxd2820r_get_tune_settings_c(struct dvb_frontend *fe,
+	struct dvb_frontend_tune_settings *s)
+{
+	s->min_delay_ms = 500;
+	s->step_size = 0; /* no zigzag */
+	s->max_drift = 0;
+
+	return 0;
+}