Initial import

1 files changed, 614 insertions, 0 deletions

diff --git a/drivers/media/tuners/e4000.c b/drivers/media/tuners/e4000.c
new file mode 100644
index 000000000..510239f80
--- /dev/null
+++ b/drivers/media/tuners/e4000.c
@@ -0,0 +1,614 @@
+/*
+ * Elonics E4000 silicon tuner driver
+ *
+ * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License along
+ *    with this program; if not, write to the Free Software Foundation, Inc.,
+ *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "e4000_priv.h"
+#include <linux/math64.h>
+
+static int e4000_init(struct dvb_frontend *fe)
+{
+	struct e4000 *s = fe->tuner_priv;
+	int ret;
+
+	dev_dbg(&s->client->dev, "\n");
+
+	/* dummy I2C to ensure I2C wakes up */
+	ret = regmap_write(s->regmap, 0x02, 0x40);
+
+	/* reset */
+	ret = regmap_write(s->regmap, 0x00, 0x01);
+	if (ret)
+		goto err;
+
+	/* disable output clock */
+	ret = regmap_write(s->regmap, 0x06, 0x00);
+	if (ret)
+		goto err;
+
+	ret = regmap_write(s->regmap, 0x7a, 0x96);
+	if (ret)
+		goto err;
+
+	/* configure gains */
+	ret = regmap_bulk_write(s->regmap, 0x7e, "\x01\xfe", 2);
+	if (ret)
+		goto err;
+
+	ret = regmap_write(s->regmap, 0x82, 0x00);
+	if (ret)
+		goto err;
+
+	ret = regmap_write(s->regmap, 0x24, 0x05);
+	if (ret)
+		goto err;
+
+	ret = regmap_bulk_write(s->regmap, 0x87, "\x20\x01", 2);
+	if (ret)
+		goto err;
+
+	ret = regmap_bulk_write(s->regmap, 0x9f, "\x7f\x07", 2);
+	if (ret)
+		goto err;
+
+	/* DC offset control */
+	ret = regmap_write(s->regmap, 0x2d, 0x1f);
+	if (ret)
+		goto err;
+
+	ret = regmap_bulk_write(s->regmap, 0x70, "\x01\x01", 2);
+	if (ret)
+		goto err;
+
+	/* gain control */
+	ret = regmap_write(s->regmap, 0x1a, 0x17);
+	if (ret)
+		goto err;
+
+	ret = regmap_write(s->regmap, 0x1f, 0x1a);
+	if (ret)
+		goto err;
+
+	s->active = true;
+err:
+	if (ret)
+		dev_dbg(&s->client->dev, "failed=%d\n", ret);
+
+	return ret;
+}
+
+static int e4000_sleep(struct dvb_frontend *fe)
+{
+	struct e4000 *s = fe->tuner_priv;
+	int ret;
+
+	dev_dbg(&s->client->dev, "\n");
+
+	s->active = false;
+
+	ret = regmap_write(s->regmap, 0x00, 0x00);
+	if (ret)
+		goto err;
+err:
+	if (ret)
+		dev_dbg(&s->client->dev, "failed=%d\n", ret);
+
+	return ret;
+}
+
+static int e4000_set_params(struct dvb_frontend *fe)
+{
+	struct e4000 *s = fe->tuner_priv;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret, i, sigma_delta;
+	unsigned int pll_n, pll_f;
+	u64 f_vco;
+	u8 buf[5], i_data[4], q_data[4];
+
+	dev_dbg(&s->client->dev,
+			"delivery_system=%d frequency=%u bandwidth_hz=%u\n",
+			c->delivery_system, c->frequency, c->bandwidth_hz);
+
+	/* gain control manual */
+	ret = regmap_write(s->regmap, 0x1a, 0x00);
+	if (ret)
+		goto err;
+
+	/* PLL */
+	for (i = 0; i < ARRAY_SIZE(e4000_pll_lut); i++) {
+		if (c->frequency <= e4000_pll_lut[i].freq)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(e4000_pll_lut)) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	f_vco = 1ull * c->frequency * e4000_pll_lut[i].mul;
+	pll_n = div_u64_rem(f_vco, s->clock, &pll_f);
+	sigma_delta = div_u64(0x10000ULL * pll_f, s->clock);
+	buf[0] = pll_n;
+	buf[1] = (sigma_delta >> 0) & 0xff;
+	buf[2] = (sigma_delta >> 8) & 0xff;
+	buf[3] = 0x00;
+	buf[4] = e4000_pll_lut[i].div;
+
+	dev_dbg(&s->client->dev, "f_vco=%llu pll div=%d sigma_delta=%04x\n",
+			f_vco, buf[0], sigma_delta);
+
+	ret = regmap_bulk_write(s->regmap, 0x09, buf, 5);
+	if (ret)
+		goto err;
+
+	/* LNA filter (RF filter) */
+	for (i = 0; i < ARRAY_SIZE(e400_lna_filter_lut); i++) {
+		if (c->frequency <= e400_lna_filter_lut[i].freq)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(e400_lna_filter_lut)) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	ret = regmap_write(s->regmap, 0x10, e400_lna_filter_lut[i].val);
+	if (ret)
+		goto err;
+
+	/* IF filters */
+	for (i = 0; i < ARRAY_SIZE(e4000_if_filter_lut); i++) {
+		if (c->bandwidth_hz <= e4000_if_filter_lut[i].freq)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(e4000_if_filter_lut)) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	buf[0] = e4000_if_filter_lut[i].reg11_val;
+	buf[1] = e4000_if_filter_lut[i].reg12_val;
+
+	ret = regmap_bulk_write(s->regmap, 0x11, buf, 2);
+	if (ret)
+		goto err;
+
+	/* frequency band */
+	for (i = 0; i < ARRAY_SIZE(e4000_band_lut); i++) {
+		if (c->frequency <= e4000_band_lut[i].freq)
+			break;
+	}
+
+	if (i == ARRAY_SIZE(e4000_band_lut)) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	ret = regmap_write(s->regmap, 0x07, e4000_band_lut[i].reg07_val);
+	if (ret)
+		goto err;
+
+	ret = regmap_write(s->regmap, 0x78, e4000_band_lut[i].reg78_val);
+	if (ret)
+		goto err;
+
+	/* DC offset */
+	for (i = 0; i < 4; i++) {
+		if (i == 0)
+			ret = regmap_bulk_write(s->regmap, 0x15, "\x00\x7e\x24", 3);
+		else if (i == 1)
+			ret = regmap_bulk_write(s->regmap, 0x15, "\x00\x7f", 2);
+		else if (i == 2)
+			ret = regmap_bulk_write(s->regmap, 0x15, "\x01", 1);
+		else
+			ret = regmap_bulk_write(s->regmap, 0x16, "\x7e", 1);
+
+		if (ret)
+			goto err;
+
+		ret = regmap_write(s->regmap, 0x29, 0x01);
+		if (ret)
+			goto err;
+
+		ret = regmap_bulk_read(s->regmap, 0x2a, buf, 3);
+		if (ret)
+			goto err;
+
+		i_data[i] = (((buf[2] >> 0) & 0x3) << 6) | (buf[0] & 0x3f);
+		q_data[i] = (((buf[2] >> 4) & 0x3) << 6) | (buf[1] & 0x3f);
+	}
+
+	swap(q_data[2], q_data[3]);
+	swap(i_data[2], i_data[3]);
+
+	ret = regmap_bulk_write(s->regmap, 0x50, q_data, 4);
+	if (ret)
+		goto err;
+
+	ret = regmap_bulk_write(s->regmap, 0x60, i_data, 4);
+	if (ret)
+		goto err;
+
+	/* gain control auto */
+	ret = regmap_write(s->regmap, 0x1a, 0x17);
+	if (ret)
+		goto err;
+err:
+	if (ret)
+		dev_dbg(&s->client->dev, "failed=%d\n", ret);
+
+	return ret;
+}
+
+static int e4000_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct e4000 *s = fe->tuner_priv;
+
+	dev_dbg(&s->client->dev, "\n");
+
+	*frequency = 0; /* Zero-IF */
+
+	return 0;
+}
+
+#if IS_ENABLED(CONFIG_VIDEO_V4L2)
+static int e4000_set_lna_gain(struct dvb_frontend *fe)
+{
+	struct e4000 *s = fe->tuner_priv;
+	int ret;
+	u8 u8tmp;
+
+	dev_dbg(&s->client->dev, "lna auto=%d->%d val=%d->%d\n",
+			s->lna_gain_auto->cur.val, s->lna_gain_auto->val,
+			s->lna_gain->cur.val, s->lna_gain->val);
+
+	if (s->lna_gain_auto->val && s->if_gain_auto->cur.val)
+		u8tmp = 0x17;
+	else if (s->lna_gain_auto->val)
+		u8tmp = 0x19;
+	else if (s->if_gain_auto->cur.val)
+		u8tmp = 0x16;
+	else
+		u8tmp = 0x10;
+
+	ret = regmap_write(s->regmap, 0x1a, u8tmp);
+	if (ret)
+		goto err;
+
+	if (s->lna_gain_auto->val == false) {
+		ret = regmap_write(s->regmap, 0x14, s->lna_gain->val);
+		if (ret)
+			goto err;
+	}
+err:
+	if (ret)
+		dev_dbg(&s->client->dev, "failed=%d\n", ret);
+
+	return ret;
+}
+
+static int e4000_set_mixer_gain(struct dvb_frontend *fe)
+{
+	struct e4000 *s = fe->tuner_priv;
+	int ret;
+	u8 u8tmp;
+
+	dev_dbg(&s->client->dev, "mixer auto=%d->%d val=%d->%d\n",
+			s->mixer_gain_auto->cur.val, s->mixer_gain_auto->val,
+			s->mixer_gain->cur.val, s->mixer_gain->val);
+
+	if (s->mixer_gain_auto->val)
+		u8tmp = 0x15;
+	else
+		u8tmp = 0x14;
+
+	ret = regmap_write(s->regmap, 0x20, u8tmp);
+	if (ret)
+		goto err;
+
+	if (s->mixer_gain_auto->val == false) {
+		ret = regmap_write(s->regmap, 0x15, s->mixer_gain->val);
+		if (ret)
+			goto err;
+	}
+err:
+	if (ret)
+		dev_dbg(&s->client->dev, "failed=%d\n", ret);
+
+	return ret;
+}
+
+static int e4000_set_if_gain(struct dvb_frontend *fe)
+{
+	struct e4000 *s = fe->tuner_priv;
+	int ret;
+	u8 buf[2];
+	u8 u8tmp;
+
+	dev_dbg(&s->client->dev, "if auto=%d->%d val=%d->%d\n",
+			s->if_gain_auto->cur.val, s->if_gain_auto->val,
+			s->if_gain->cur.val, s->if_gain->val);
+
+	if (s->if_gain_auto->val && s->lna_gain_auto->cur.val)
+		u8tmp = 0x17;
+	else if (s->lna_gain_auto->cur.val)
+		u8tmp = 0x19;
+	else if (s->if_gain_auto->val)
+		u8tmp = 0x16;
+	else
+		u8tmp = 0x10;
+
+	ret = regmap_write(s->regmap, 0x1a, u8tmp);
+	if (ret)
+		goto err;
+
+	if (s->if_gain_auto->val == false) {
+		buf[0] = e4000_if_gain_lut[s->if_gain->val].reg16_val;
+		buf[1] = e4000_if_gain_lut[s->if_gain->val].reg17_val;
+		ret = regmap_bulk_write(s->regmap, 0x16, buf, 2);
+		if (ret)
+			goto err;
+	}
+err:
+	if (ret)
+		dev_dbg(&s->client->dev, "failed=%d\n", ret);
+
+	return ret;
+}
+
+static int e4000_pll_lock(struct dvb_frontend *fe)
+{
+	struct e4000 *s = fe->tuner_priv;
+	int ret;
+	unsigned int utmp;
+
+	ret = regmap_read(s->regmap, 0x07, &utmp);
+	if (ret)
+		goto err;
+
+	s->pll_lock->val = (utmp & 0x01);
+err:
+	if (ret)
+		dev_dbg(&s->client->dev, "failed=%d\n", ret);
+
+	return ret;
+}
+
+static int e4000_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct e4000 *s = container_of(ctrl->handler, struct e4000, hdl);
+	int ret;
+
+	if (!s->active)
+		return 0;
+
+	switch (ctrl->id) {
+	case  V4L2_CID_RF_TUNER_PLL_LOCK:
+		ret = e4000_pll_lock(s->fe);
+		break;
+	default:
+		dev_dbg(&s->client->dev, "unknown ctrl: id=%d name=%s\n",
+				ctrl->id, ctrl->name);
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int e4000_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct e4000 *s = container_of(ctrl->handler, struct e4000, hdl);
+	struct dvb_frontend *fe = s->fe;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+
+	if (!s->active)
+		return 0;
+
+	switch (ctrl->id) {
+	case V4L2_CID_RF_TUNER_BANDWIDTH_AUTO:
+	case V4L2_CID_RF_TUNER_BANDWIDTH:
+		c->bandwidth_hz = s->bandwidth->val;
+		ret = e4000_set_params(s->fe);
+		break;
+	case  V4L2_CID_RF_TUNER_LNA_GAIN_AUTO:
+	case  V4L2_CID_RF_TUNER_LNA_GAIN:
+		ret = e4000_set_lna_gain(s->fe);
+		break;
+	case  V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO:
+	case  V4L2_CID_RF_TUNER_MIXER_GAIN:
+		ret = e4000_set_mixer_gain(s->fe);
+		break;
+	case  V4L2_CID_RF_TUNER_IF_GAIN_AUTO:
+	case  V4L2_CID_RF_TUNER_IF_GAIN:
+		ret = e4000_set_if_gain(s->fe);
+		break;
+	default:
+		dev_dbg(&s->client->dev, "unknown ctrl: id=%d name=%s\n",
+				ctrl->id, ctrl->name);
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static const struct v4l2_ctrl_ops e4000_ctrl_ops = {
+	.g_volatile_ctrl = e4000_g_volatile_ctrl,
+	.s_ctrl = e4000_s_ctrl,
+};
+#endif
+
+static const struct dvb_tuner_ops e4000_tuner_ops = {
+	.info = {
+		.name           = "Elonics E4000",
+		.frequency_min  = 174000000,
+		.frequency_max  = 862000000,
+	},
+
+	.init = e4000_init,
+	.sleep = e4000_sleep,
+	.set_params = e4000_set_params,
+
+	.get_if_frequency = e4000_get_if_frequency,
+};
+
+/*
+ * Use V4L2 subdev to carry V4L2 control handler, even we don't implement
+ * subdev itself, just to avoid reinventing the wheel.
+ */
+static int e4000_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	struct e4000_config *cfg = client->dev.platform_data;
+	struct dvb_frontend *fe = cfg->fe;
+	struct e4000 *s;
+	int ret;
+	unsigned int utmp;
+	static const struct regmap_config regmap_config = {
+		.reg_bits = 8,
+		.val_bits = 8,
+		.max_register = 0xff,
+	};
+
+	s = kzalloc(sizeof(struct e4000), GFP_KERNEL);
+	if (!s) {
+		ret = -ENOMEM;
+		dev_err(&client->dev, "kzalloc() failed\n");
+		goto err;
+	}
+
+	s->clock = cfg->clock;
+	s->client = client;
+	s->fe = cfg->fe;
+	s->regmap = devm_regmap_init_i2c(client, &regmap_config);
+	if (IS_ERR(s->regmap)) {
+		ret = PTR_ERR(s->regmap);
+		goto err;
+	}
+
+	/* check if the tuner is there */
+	ret = regmap_read(s->regmap, 0x02, &utmp);
+	if (ret)
+		goto err;
+
+	dev_dbg(&s->client->dev, "chip id=%02x\n", utmp);
+
+	if (utmp != 0x40) {
+		ret = -ENODEV;
+		goto err;
+	}
+
+	/* put sleep as chip seems to be in normal mode by default */
+	ret = regmap_write(s->regmap, 0x00, 0x00);
+	if (ret)
+		goto err;
+
+#if IS_ENABLED(CONFIG_VIDEO_V4L2)
+	/* Register controls */
+	v4l2_ctrl_handler_init(&s->hdl, 9);
+	s->bandwidth_auto = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
+			V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
+	s->bandwidth = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
+			V4L2_CID_RF_TUNER_BANDWIDTH, 4300000, 11000000, 100000, 4300000);
+	v4l2_ctrl_auto_cluster(2, &s->bandwidth_auto, 0, false);
+	s->lna_gain_auto = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
+			V4L2_CID_RF_TUNER_LNA_GAIN_AUTO, 0, 1, 1, 1);
+	s->lna_gain = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
+			V4L2_CID_RF_TUNER_LNA_GAIN, 0, 15, 1, 10);
+	v4l2_ctrl_auto_cluster(2, &s->lna_gain_auto, 0, false);
+	s->mixer_gain_auto = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
+			V4L2_CID_RF_TUNER_MIXER_GAIN_AUTO, 0, 1, 1, 1);
+	s->mixer_gain = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
+			V4L2_CID_RF_TUNER_MIXER_GAIN, 0, 1, 1, 1);
+	v4l2_ctrl_auto_cluster(2, &s->mixer_gain_auto, 0, false);
+	s->if_gain_auto = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
+			V4L2_CID_RF_TUNER_IF_GAIN_AUTO, 0, 1, 1, 1);
+	s->if_gain = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
+			V4L2_CID_RF_TUNER_IF_GAIN, 0, 54, 1, 0);
+	v4l2_ctrl_auto_cluster(2, &s->if_gain_auto, 0, false);
+	s->pll_lock = v4l2_ctrl_new_std(&s->hdl, &e4000_ctrl_ops,
+			V4L2_CID_RF_TUNER_PLL_LOCK,  0, 1, 1, 0);
+	if (s->hdl.error) {
+		ret = s->hdl.error;
+		dev_err(&s->client->dev, "Could not initialize controls\n");
+		v4l2_ctrl_handler_free(&s->hdl);
+		goto err;
+	}
+
+	s->sd.ctrl_handler = &s->hdl;
+#endif
+
+	dev_info(&s->client->dev, "Elonics E4000 successfully identified\n");
+
+	fe->tuner_priv = s;
+	memcpy(&fe->ops.tuner_ops, &e4000_tuner_ops,
+			sizeof(struct dvb_tuner_ops));
+
+	v4l2_set_subdevdata(&s->sd, client);
+	i2c_set_clientdata(client, &s->sd);
+
+	return 0;
+err:
+	if (ret) {
+		dev_dbg(&client->dev, "failed=%d\n", ret);
+		kfree(s);
+	}
+
+	return ret;
+}
+
+static int e4000_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *sd = i2c_get_clientdata(client);
+	struct e4000 *s = container_of(sd, struct e4000, sd);
+	struct dvb_frontend *fe = s->fe;
+
+	dev_dbg(&client->dev, "\n");
+
+#if IS_ENABLED(CONFIG_VIDEO_V4L2)
+	v4l2_ctrl_handler_free(&s->hdl);
+#endif
+	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
+	fe->tuner_priv = NULL;
+	kfree(s);
+
+	return 0;
+}
+
+static const struct i2c_device_id e4000_id[] = {
+	{"e4000", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, e4000_id);
+
+static struct i2c_driver e4000_driver = {
+	.driver = {
+		.owner	= THIS_MODULE,
+		.name	= "e4000",
+	},
+	.probe		= e4000_probe,
+	.remove		= e4000_remove,
+	.id_table	= e4000_id,
+};
+
+module_i2c_driver(e4000_driver);
+
+MODULE_DESCRIPTION("Elonics E4000 silicon tuner driver");
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_LICENSE("GPL");