[media] Montage M88TS2022 silicon tuner driver

M88TS2022 is DVB-S/S2 RF tuner used usually in conjunction with
Montage M88DS3103 DVB-S/S2 demodulator.

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

5 files changed, 782 insertions, 0 deletions

diff --git a/drivers/media/tuners/Kconfig b/drivers/media/tuners/Kconfig
index 15665de..ba2e365 100644
--- a/drivers/media/tuners/Kconfig
+++ b/drivers/media/tuners/Kconfig
@@ -215,6 +215,13 @@ config MEDIA_TUNER_FC2580
 	help
 	  FCI FC2580 silicon tuner driver.
 
+config MEDIA_TUNER_M88TS2022
+	tristate "Montage M88TS2022 silicon tuner"
+	depends on MEDIA_SUPPORT && I2C
+	default m if !MEDIA_SUBDRV_AUTOSELECT
+	help
+	  Montage M88TS2022 silicon tuner driver.
+
 config MEDIA_TUNER_TUA9001
 	tristate "Infineon TUA 9001 silicon tuner"
 	depends on MEDIA_SUPPORT && I2C
diff --git a/drivers/media/tuners/Makefile b/drivers/media/tuners/Makefile
index 308f108..efe82a9 100644
--- a/drivers/media/tuners/Makefile
+++ b/drivers/media/tuners/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_MEDIA_TUNER_TDA18212) += tda18212.o
 obj-$(CONFIG_MEDIA_TUNER_E4000) += e4000.o
 obj-$(CONFIG_MEDIA_TUNER_FC2580) += fc2580.o
 obj-$(CONFIG_MEDIA_TUNER_TUA9001) += tua9001.o
+obj-$(CONFIG_MEDIA_TUNER_M88TS2022) += m88ts2022.o
 obj-$(CONFIG_MEDIA_TUNER_FC0011) += fc0011.o
 obj-$(CONFIG_MEDIA_TUNER_FC0012) += fc0012.o
 obj-$(CONFIG_MEDIA_TUNER_FC0013) += fc0013.o
diff --git a/drivers/media/tuners/m88ts2022.c b/drivers/media/tuners/m88ts2022.c
new file mode 100644
index 0000000..0625e36
--- /dev/null
+++ b/drivers/media/tuners/m88ts2022.c
@@ -0,0 +1,664 @@
+/*
+ * Montage M88TS2022 silicon tuner driver
+ *
+ * Copyright (C) 2013 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.
+ *
+ * Some calculations are taken from existing TS2020 driver.
+ */
+
+#include "m88ts2022_priv.h"
+
+/* write multiple registers */
+static int m88ts2022_wr_regs(struct m88ts2022_priv *priv,
+		u8 reg, const u8 *val, int len)
+{
+	int ret;
+	u8 buf[1 + len];
+	struct i2c_msg msg[1] = {
+		{
+			.addr = priv->cfg->i2c_addr,
+			.flags = 0,
+			.len = sizeof(buf),
+			.buf = buf,
+		}
+	};
+
+	buf[0] = reg;
+	memcpy(&buf[1], val, len);
+
+	ret = i2c_transfer(priv->i2c, msg, 1);
+	if (ret == 1) {
+		ret = 0;
+	} else {
+		dev_warn(&priv->i2c->dev,
+				"%s: i2c wr failed=%d reg=%02x len=%d\n",
+				KBUILD_MODNAME, ret, reg, len);
+		ret = -EREMOTEIO;
+	}
+
+	return ret;
+}
+
+/* read multiple registers */
+static int m88ts2022_rd_regs(struct m88ts2022_priv *priv, u8 reg,
+		u8 *val, int len)
+{
+	int ret;
+	u8 buf[len];
+	struct i2c_msg msg[2] = {
+		{
+			.addr = priv->cfg->i2c_addr,
+			.flags = 0,
+			.len = 1,
+			.buf = &reg,
+		}, {
+			.addr = priv->cfg->i2c_addr,
+			.flags = I2C_M_RD,
+			.len = sizeof(buf),
+			.buf = buf,
+		}
+	};
+
+	ret = i2c_transfer(priv->i2c, msg, 2);
+	if (ret == 2) {
+		memcpy(val, buf, len);
+		ret = 0;
+	} else {
+		dev_warn(&priv->i2c->dev,
+				"%s: i2c rd failed=%d reg=%02x len=%d\n",
+				KBUILD_MODNAME, ret, reg, len);
+		ret = -EREMOTEIO;
+	}
+
+	return ret;
+}
+
+/* write single register */
+static int m88ts2022_wr_reg(struct m88ts2022_priv *priv, u8 reg, u8 val)
+{
+	return m88ts2022_wr_regs(priv, reg, &val, 1);
+}
+
+/* read single register */
+static int m88ts2022_rd_reg(struct m88ts2022_priv *priv, u8 reg, u8 *val)
+{
+	return m88ts2022_rd_regs(priv, reg, val, 1);
+}
+
+/* write single register with mask */
+static int m88ts2022_wr_reg_mask(struct m88ts2022_priv *priv,
+		u8 reg, u8 val, u8 mask)
+{
+	int ret;
+	u8 u8tmp;
+
+	/* no need for read if whole reg is written */
+	if (mask != 0xff) {
+		ret = m88ts2022_rd_regs(priv, reg, &u8tmp, 1);
+		if (ret)
+			return ret;
+
+		val &= mask;
+		u8tmp &= ~mask;
+		val |= u8tmp;
+	}
+
+	return m88ts2022_wr_regs(priv, reg, &val, 1);
+}
+
+static int m88ts2022_cmd(struct dvb_frontend *fe,
+		int op, int sleep, u8 reg, u8 mask, u8 val, u8 *reg_val)
+{
+	struct m88ts2022_priv *priv = fe->tuner_priv;
+	int ret, i;
+	u8 u8tmp;
+	struct m88ts2022_reg_val reg_vals[] = {
+		{0x51, 0x1f - op},
+		{0x51, 0x1f},
+		{0x50, 0x00 + op},
+		{0x50, 0x00},
+	};
+
+	for (i = 0; i < 2; i++) {
+		dev_dbg(&priv->i2c->dev,
+				"%s: i=%d op=%02x reg=%02x mask=%02x val=%02x\n",
+				__func__, i, op, reg, mask, val);
+
+		for (i = 0; i < ARRAY_SIZE(reg_vals); i++) {
+			ret = m88ts2022_wr_reg(priv, reg_vals[i].reg,
+					reg_vals[i].val);
+			if (ret)
+				goto err;
+		}
+
+		usleep_range(sleep * 1000, sleep * 10000);
+
+		ret = m88ts2022_rd_reg(priv, reg, &u8tmp);
+		if (ret)
+			goto err;
+
+		if ((u8tmp & mask) != val)
+			break;
+	}
+
+	if (reg_val)
+		*reg_val = u8tmp;
+err:
+	return ret;
+}
+
+static int m88ts2022_set_params(struct dvb_frontend *fe)
+{
+	struct m88ts2022_priv *priv = fe->tuner_priv;
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret = 0, div;
+	u8 buf[3], u8tmp, cap_code, lpf_mxdiv, div_max, div_min;
+	u16 N_reg, N, K;
+	u32 lpf_gm, lpf_coeff, gdiv28, frequency_khz, frequency_offset;
+	u32 freq_3db;
+	dev_dbg(&priv->i2c->dev,
+			"%s: frequency=%d symbol_rate=%d rolloff=%d\n",
+			__func__, c->frequency, c->symbol_rate, c->rolloff);
+
+	if (c->symbol_rate < 5000000)
+		frequency_offset = 3000000; /* 3 MHz */
+	else
+		frequency_offset = 0;
+
+	frequency_khz = c->frequency + (frequency_offset / 1000);
+
+	if (frequency_khz < 1103000) {
+		div = 2;
+		u8tmp = 0x1b;
+	} else {
+		div = 1;
+		u8tmp = 0x0b;
+	}
+
+	buf[0] = u8tmp;
+	buf[1] = 0x40;
+	ret = m88ts2022_wr_regs(priv, 0x10, buf, 2);
+	if (ret)
+		goto err;
+
+	K = DIV_ROUND_CLOSEST((priv->cfg->clock / 2), 1000000);
+	N = 1ul * frequency_khz * K * div * 2 / (priv->cfg->clock / 1000);
+	N += N % 2;
+
+	if (N < 4095)
+		N_reg = N - 1024;
+	else if (N < 6143)
+		N_reg = N + 1024;
+	else
+		N_reg = N + 3072;
+
+	buf[0] = (N_reg >> 8) & 0x3f;
+	buf[1] = (N_reg >> 0) & 0xff;
+	buf[2] = K - 8;
+	ret = m88ts2022_wr_regs(priv, 0x01, buf, 3);
+	if (ret)
+		goto err;
+
+	priv->frequency_khz = 1ul * N * (priv->cfg->clock / 1000) / K / div / 2;
+
+	dev_dbg(&priv->i2c->dev,
+			"%s: frequency=%d offset=%d K=%d N=%d div=%d\n",
+			__func__, priv->frequency_khz,
+			priv->frequency_khz - c->frequency, K, N, div);
+
+	ret = m88ts2022_cmd(fe, 0x10, 5, 0x15, 0x40, 0x00, NULL);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_rd_reg(priv, 0x14, &u8tmp);
+	if (ret)
+		goto err;
+
+	u8tmp &= 0x7f;
+	if (u8tmp < 64) {
+		ret = m88ts2022_wr_reg_mask(priv, 0x10, 0x80, 0x80);
+		if (ret)
+			goto err;
+
+		ret = m88ts2022_wr_reg(priv, 0x11, 0x6f);
+		if (ret)
+			goto err;
+
+		ret = m88ts2022_cmd(fe, 0x10, 5, 0x15, 0x40, 0x00, NULL);
+		if (ret)
+			goto err;
+	}
+
+	ret = m88ts2022_rd_reg(priv, 0x14, &u8tmp);
+	if (ret)
+		goto err;
+
+	u8tmp &= 0x1f;
+	if (u8tmp > 19) {
+		ret = m88ts2022_wr_reg_mask(priv, 0x10, 0x00, 0x02);
+		if (ret)
+			goto err;
+	}
+
+	ret = m88ts2022_cmd(fe, 0x08, 5, 0x3c, 0xff, 0x00, NULL);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_wr_reg(priv, 0x25, 0x00);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_wr_reg(priv, 0x27, 0x70);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_wr_reg(priv, 0x41, 0x09);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_wr_reg(priv, 0x08, 0x0b);
+	if (ret)
+		goto err;
+
+	gdiv28 = DIV_ROUND_CLOSEST(priv->cfg->clock / 1000000 * 1694, 1000);
+
+	ret = m88ts2022_wr_reg(priv, 0x04, gdiv28);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
+	if (ret)
+		goto err;
+
+	cap_code = u8tmp & 0x3f;
+
+	ret = m88ts2022_wr_reg(priv, 0x41, 0x0d);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
+	if (ret)
+		goto err;
+
+	u8tmp &= 0x3f;
+	cap_code = (cap_code + u8tmp) / 2;
+	gdiv28 = gdiv28 * 207 / (cap_code * 2 + 151);
+	div_max = gdiv28 * 135 / 100;
+	div_min = gdiv28 * 78 / 100;
+	if (div_max > 63)
+		div_max = 63;
+
+	freq_3db = 1ul * c->symbol_rate * 135 / 200 + 2000000;
+	freq_3db += frequency_offset;
+	if (freq_3db < 7000000)
+		freq_3db = 7000000;
+	if (freq_3db > 40000000)
+		freq_3db = 40000000;
+
+	lpf_coeff = 3200;
+	lpf_gm = DIV_ROUND_CLOSEST(freq_3db * gdiv28, lpf_coeff *
+			(priv->cfg->clock / 1000));
+	if (lpf_gm > 23)
+		lpf_gm = 23;
+	if (lpf_gm < 1)
+		lpf_gm = 1;
+
+	lpf_mxdiv = DIV_ROUND_CLOSEST(lpf_gm * lpf_coeff *
+			(priv->cfg->clock / 1000), freq_3db);
+
+	if (lpf_mxdiv < div_min) {
+		lpf_gm++;
+		lpf_mxdiv = DIV_ROUND_CLOSEST(lpf_gm * lpf_coeff *
+				(priv->cfg->clock / 1000), freq_3db);
+	}
+
+	if (lpf_mxdiv > div_max)
+		lpf_mxdiv = div_max;
+
+	ret = m88ts2022_wr_reg(priv, 0x04, lpf_mxdiv);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_wr_reg(priv, 0x06, lpf_gm);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
+	if (ret)
+		goto err;
+
+	cap_code = u8tmp & 0x3f;
+
+	ret = m88ts2022_wr_reg(priv, 0x41, 0x09);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_cmd(fe, 0x04, 2, 0x26, 0xff, 0x00, &u8tmp);
+	if (ret)
+		goto err;
+
+	u8tmp &= 0x3f;
+	cap_code = (cap_code + u8tmp) / 2;
+
+	u8tmp = cap_code | 0x80;
+	ret = m88ts2022_wr_reg(priv, 0x25, u8tmp);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_wr_reg(priv, 0x27, 0x30);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_wr_reg(priv, 0x08, 0x09);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_cmd(fe, 0x01, 20, 0x21, 0xff, 0x00, NULL);
+	if (ret)
+		goto err;
+err:
+	if (ret)
+		dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+
+	return ret;
+}
+
+static int m88ts2022_init(struct dvb_frontend *fe)
+{
+	struct m88ts2022_priv *priv = fe->tuner_priv;
+	int ret, i;
+	u8 u8tmp;
+	static const struct m88ts2022_reg_val reg_vals[] = {
+		{0x7d, 0x9d},
+		{0x7c, 0x9a},
+		{0x7a, 0x76},
+		{0x3b, 0x01},
+		{0x63, 0x88},
+		{0x61, 0x85},
+		{0x22, 0x30},
+		{0x30, 0x40},
+		{0x20, 0x23},
+		{0x24, 0x02},
+		{0x12, 0xa0},
+	};
+	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+	ret = m88ts2022_wr_reg(priv, 0x00, 0x01);
+	if (ret)
+		goto err;
+
+	ret = m88ts2022_wr_reg(priv, 0x00, 0x03);
+	if (ret)
+		goto err;
+
+	switch (priv->cfg->clock_out) {
+	case M88TS2022_CLOCK_OUT_DISABLED:
+		u8tmp = 0x60;
+		break;
+	case M88TS2022_CLOCK_OUT_ENABLED:
+		u8tmp = 0x70;
+		ret = m88ts2022_wr_reg(priv, 0x05, priv->cfg->clock_out_div);
+		if (ret)
+			goto err;
+		break;
+	case M88TS2022_CLOCK_OUT_ENABLED_XTALOUT:
+		u8tmp = 0x6c;
+		break;
+	default:
+		goto err;
+	}
+
+	ret = m88ts2022_wr_reg(priv, 0x42, u8tmp);
+	if (ret)
+		goto err;
+
+	if (priv->cfg->loop_through)
+		u8tmp = 0xec;
+	else
+		u8tmp = 0x6c;
+
+	ret = m88ts2022_wr_reg(priv, 0x62, u8tmp);
+	if (ret)
+		goto err;
+
+	for (i = 0; i < ARRAY_SIZE(reg_vals); i++) {
+		ret = m88ts2022_wr_reg(priv, reg_vals[i].reg, reg_vals[i].val);
+		if (ret)
+			goto err;
+	}
+err:
+	if (ret)
+		dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+	return ret;
+}
+
+static int m88ts2022_sleep(struct dvb_frontend *fe)
+{
+	struct m88ts2022_priv *priv = fe->tuner_priv;
+	int ret;
+	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+	ret = m88ts2022_wr_reg(priv, 0x00, 0x00);
+	if (ret)
+		goto err;
+err:
+	if (ret)
+		dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+	return ret;
+}
+
+static int m88ts2022_get_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct m88ts2022_priv *priv = fe->tuner_priv;
+	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+	*frequency = priv->frequency_khz;
+	return 0;
+}
+
+static int m88ts2022_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct m88ts2022_priv *priv = fe->tuner_priv;
+	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+	*frequency = 0; /* Zero-IF */
+	return 0;
+}
+
+static int m88ts2022_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
+{
+	struct m88ts2022_priv *priv = fe->tuner_priv;
+	u8  u8tmp, gain1, gain2, gain3;
+	u16 gain, u16tmp;
+	int ret;
+
+	ret = m88ts2022_rd_reg(priv, 0x3d, &u8tmp);
+	if (ret)
+		goto err;
+
+	gain1 = (u8tmp >> 0) & 0x1f;
+	if (gain1 > 15)
+		gain1 = 15;
+
+	ret = m88ts2022_rd_reg(priv, 0x21, &u8tmp);
+	if (ret)
+		goto err;
+
+	gain2 = (u8tmp >> 0) & 0x1f;
+	if (gain2 < 2)
+		gain2 = 2;
+	if (gain2 > 16)
+		gain2 = 16;
+
+	ret = m88ts2022_rd_reg(priv, 0x66, &u8tmp);
+	if (ret)
+		goto err;
+
+	gain3 = (u8tmp >> 3) & 0x07;
+	if (gain3 > 6)
+		gain3 = 6;
+
+	gain = gain1 * 265 + gain2 * 338 + gain3 * 285;
+
+	/* scale value to 0x0000-0xffff */
+	u16tmp = (0xffff - gain);
+	if (u16tmp < 59000)
+		u16tmp = 59000;
+	else if (u16tmp > 61500)
+		u16tmp = 61500;
+
+	*strength = (u16tmp - 59000) * 0xffff / (61500 - 59000);
+err:
+	if (ret)
+		dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
+	return ret;
+}
+
+static int m88ts2022_release(struct dvb_frontend *fe)
+{
+	struct m88ts2022_priv *priv = fe->tuner_priv;
+	dev_dbg(&priv->i2c->dev, "%s:\n", __func__);
+
+	kfree(fe->tuner_priv);
+	return 0;
+}
+
+static const struct dvb_tuner_ops m88ts2022_tuner_ops = {
+	.info = {
+		.name          = "Montage M88TS2022",
+		.frequency_min = 950000,
+		.frequency_max = 2150000,
+	},
+
+	.release = m88ts2022_release,
+
+	.init = m88ts2022_init,
+	.sleep = m88ts2022_sleep,
+	.set_params = m88ts2022_set_params,
+
+	.get_frequency = m88ts2022_get_frequency,
+	.get_if_frequency = m88ts2022_get_if_frequency,
+	.get_rf_strength = m88ts2022_get_rf_strength,
+};
+
+struct dvb_frontend *m88ts2022_attach(struct dvb_frontend *fe,
+		struct i2c_adapter *i2c, const struct m88ts2022_config *cfg)
+{
+	struct m88ts2022_priv *priv;
+	int ret;
+	u8 chip_id, u8tmp;
+
+	priv = kzalloc(sizeof(struct m88ts2022_priv), GFP_KERNEL);
+	if (!priv) {
+		ret = -ENOMEM;
+		dev_err(&i2c->dev, "%s: kzalloc() failed\n", KBUILD_MODNAME);
+		goto err;
+	}
+
+	priv->cfg = cfg;
+	priv->i2c = i2c;
+	priv->fe = fe;
+
+	/* check if the tuner is there */
+	ret = m88ts2022_rd_reg(priv, 0x00, &u8tmp);
+	if (ret)
+		goto err;
+
+	if ((u8tmp & 0x03) == 0x00) {
+		ret = m88ts2022_wr_reg(priv, 0x00, 0x01);
+		if (ret < 0)
+			goto err;
+
+		usleep_range(2000, 50000);
+	}
+
+	ret = m88ts2022_wr_reg(priv, 0x00, 0x03);
+	if (ret)
+		goto err;
+
+	usleep_range(2000, 50000);
+
+	ret = m88ts2022_rd_reg(priv, 0x00, &chip_id);
+	if (ret)
+		goto err;
+
+	dev_dbg(&priv->i2c->dev, "%s: chip_id=%02x\n", __func__, chip_id);
+
+	switch (chip_id) {
+	case 0xc3:
+	case 0x83:
+		break;
+	default:
+		goto err;
+	}
+
+	switch (priv->cfg->clock_out) {
+	case M88TS2022_CLOCK_OUT_DISABLED:
+		u8tmp = 0x60;
+		break;
+	case M88TS2022_CLOCK_OUT_ENABLED:
+		u8tmp = 0x70;
+		ret = m88ts2022_wr_reg(priv, 0x05, priv->cfg->clock_out_div);
+		if (ret)
+			goto err;
+		break;
+	case M88TS2022_CLOCK_OUT_ENABLED_XTALOUT:
+		u8tmp = 0x6c;
+		break;
+	default:
+		goto err;
+	}
+
+	ret = m88ts2022_wr_reg(priv, 0x42, u8tmp);
+	if (ret)
+		goto err;
+
+	if (priv->cfg->loop_through)
+		u8tmp = 0xec;
+	else
+		u8tmp = 0x6c;
+
+	ret = m88ts2022_wr_reg(priv, 0x62, u8tmp);
+	if (ret)
+		goto err;
+
+	/* sleep */
+	ret = m88ts2022_wr_reg(priv, 0x00, 0x00);
+	if (ret)
+		goto err;
+
+	dev_info(&priv->i2c->dev,
+			"%s: Montage M88TS2022 successfully identified\n",
+			KBUILD_MODNAME);
+
+	fe->tuner_priv = priv;
+	memcpy(&fe->ops.tuner_ops, &m88ts2022_tuner_ops,
+			sizeof(struct dvb_tuner_ops));
+err:
+	if (ret) {
+		dev_dbg(&i2c->dev, "%s: failed=%d\n", __func__, ret);
+		kfree(priv);
+		return NULL;
+	}
+
+	return fe;
+}
+EXPORT_SYMBOL(m88ts2022_attach);
+
+MODULE_DESCRIPTION("Montage M88TS2022 silicon tuner driver");
+MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/media/tuners/m88ts2022.h b/drivers/media/tuners/m88ts2022.h
new file mode 100644
index 0000000..fa1112c
--- /dev/null
+++ b/drivers/media/tuners/m88ts2022.h
@@ -0,0 +1,72 @@
+/*
+ * Montage M88TS2022 silicon tuner driver
+ *
+ * Copyright (C) 2013 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.
+ */
+
+#ifndef M88TS2022_H
+#define M88TS2022_H
+
+#include "dvb_frontend.h"
+
+struct m88ts2022_config {
+	/*
+	 * I2C address
+	 * 0x60, ...
+	 */
+	u8 i2c_addr;
+
+	/*
+	 * clock
+	 * 16000000 - 32000000
+	 */
+	u32 clock;
+
+	/*
+	 * RF loop-through
+	 */
+	u8 loop_through:1;
+
+	/*
+	 * clock output
+	 */
+#define M88TS2022_CLOCK_OUT_DISABLED        0
+#define M88TS2022_CLOCK_OUT_ENABLED         1
+#define M88TS2022_CLOCK_OUT_ENABLED_XTALOUT 2
+	u8 clock_out:2;
+
+	/*
+	 * clock output divider
+	 * 1 - 31
+	 */
+	u8 clock_out_div:5;
+};
+
+#if defined(CONFIG_MEDIA_TUNER_M88TS2022) || \
+	(defined(CONFIG_MEDIA_TUNER_M88TS2022_MODULE) && defined(MODULE))
+extern struct dvb_frontend *m88ts2022_attach(struct dvb_frontend *fe,
+	struct i2c_adapter *i2c, const struct m88ts2022_config *cfg);
+#else
+static inline struct dvb_frontend *m88ts2022_attach(struct dvb_frontend *fe,
+	struct i2c_adapter *i2c, const struct m88ts2022_config *cfg)
+{
+	pr_warn("%s: driver disabled by Kconfig\n", __func__);
+	return NULL;
+}
+#endif
+
+#endif
diff --git a/drivers/media/tuners/m88ts2022_priv.h b/drivers/media/tuners/m88ts2022_priv.h
new file mode 100644
index 0000000..190299a
--- /dev/null
+++ b/drivers/media/tuners/m88ts2022_priv.h
@@ -0,0 +1,38 @@
+/*
+ * Montage M88TS2022 silicon tuner driver
+ *
+ * Copyright (C) 2013 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.
+ */
+
+#ifndef M88TS2022_PRIV_H
+#define M88TS2022_PRIV_H
+
+#include "m88ts2022.h"
+
+struct m88ts2022_priv {
+	const struct m88ts2022_config *cfg;
+	struct i2c_adapter *i2c;
+	struct dvb_frontend *fe;
+	u32 frequency_khz;
+};
+
+struct m88ts2022_reg_val {
+	u8 reg;
+	u8 val;
+};
+
+#endif