media: tda18250: support for new silicon tuner

NXP TDA18250 silicon tuner driver.

Version 4 includes some checkpatch fixes.

Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

1 files changed, 902 insertions, 0 deletions

diff --git a/drivers/media/tuners/tda18250.c b/drivers/media/tuners/tda18250.c
new file mode 100644
index 000000000000..20d12b063380
--- /dev/null
+++ b/drivers/media/tuners/tda18250.c
@@ -0,0 +1,902 @@
+/*
+ * NXP TDA18250 silicon tuner driver
+ *
+ * Copyright (C) 2017 Olli Salonen <olli.salonen@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.
+ *
+ */
+
+#include "tda18250_priv.h"
+#include <linux/regmap.h>
+
+static const struct dvb_tuner_ops tda18250_ops;
+
+static int tda18250_power_control(struct dvb_frontend *fe,
+		unsigned int power_state)
+{
+	struct i2c_client *client = fe->tuner_priv;
+	struct tda18250_dev *dev = i2c_get_clientdata(client);
+	int ret;
+	unsigned int utmp;
+
+	dev_dbg(&client->dev, "power state: %d", power_state);
+
+	switch (power_state) {
+	case TDA18250_POWER_NORMAL:
+		ret = regmap_write_bits(dev->regmap, R06_POWER2, 0x07, 0x00);
+		if (ret)
+			goto err;
+		ret = regmap_write_bits(dev->regmap, R25_REF, 0xc0, 0xc0);
+		if (ret)
+			goto err;
+		break;
+	case TDA18250_POWER_STANDBY:
+		if (dev->loopthrough) {
+			ret = regmap_write_bits(dev->regmap,
+					R25_REF, 0xc0, 0x80);
+			if (ret)
+				goto err;
+			ret = regmap_write_bits(dev->regmap,
+					R06_POWER2, 0x07, 0x02);
+			if (ret)
+				goto err;
+			ret = regmap_write_bits(dev->regmap,
+					R10_LT1, 0x80, 0x00);
+			if (ret)
+				goto err;
+		} else {
+			ret = regmap_write_bits(dev->regmap,
+					R25_REF, 0xc0, 0x80);
+			if (ret)
+				goto err;
+			ret = regmap_write_bits(dev->regmap,
+					R06_POWER2, 0x07, 0x01);
+			if (ret)
+				goto err;
+			ret = regmap_read(dev->regmap,
+					R0D_AGC12, &utmp);
+			if (ret)
+				goto err;
+			ret = regmap_write_bits(dev->regmap,
+					R0D_AGC12, 0x03, 0x03);
+			if (ret)
+				goto err;
+			ret = regmap_write_bits(dev->regmap,
+					R10_LT1, 0x80, 0x80);
+			if (ret)
+				goto err;
+			ret = regmap_write_bits(dev->regmap,
+					R0D_AGC12, 0x03, utmp & 0x03);
+			if (ret)
+				goto err;
+		}
+		break;
+	default:
+		ret = -EINVAL;
+		goto err;
+	}
+
+	return 0;
+err:
+	return ret;
+}
+
+static int tda18250_wait_for_irq(struct dvb_frontend *fe,
+		int maxwait, int step, u8 irq)
+{
+	struct i2c_client *client = fe->tuner_priv;
+	struct tda18250_dev *dev = i2c_get_clientdata(client);
+	int ret;
+	unsigned long timeout;
+	bool triggered;
+	unsigned int utmp;
+
+	triggered = false;
+	timeout = jiffies + msecs_to_jiffies(maxwait);
+	while (!time_after(jiffies, timeout)) {
+		// check for the IRQ
+		ret = regmap_read(dev->regmap, R08_IRQ1, &utmp);
+		if (ret)
+			goto err;
+		if ((utmp & irq) == irq) {
+			triggered = true;
+			break;
+		}
+		msleep(step);
+	}
+
+	dev_dbg(&client->dev, "waited IRQ (0x%02x) %d ms, triggered: %s", irq,
+			jiffies_to_msecs(jiffies) -
+			(jiffies_to_msecs(timeout) - maxwait),
+			triggered ? "true" : "false");
+
+	if (!triggered)
+		return -ETIMEDOUT;
+
+	return 0;
+err:
+	return ret;
+}
+
+static int tda18250_init(struct dvb_frontend *fe)
+{
+	struct i2c_client *client = fe->tuner_priv;
+	struct tda18250_dev *dev = i2c_get_clientdata(client);
+	int ret, i;
+
+	/* default values for various regs */
+	static const u8 init_regs[][2] = {
+		{ R0C_AGC11, 0xc7 },
+		{ R0D_AGC12, 0x5d },
+		{ R0E_AGC13, 0x40 },
+		{ R0F_AGC14, 0x0e },
+		{ R10_LT1, 0x47 },
+		{ R11_LT2, 0x4e },
+		{ R12_AGC21, 0x26 },
+		{ R13_AGC22, 0x60 },
+		{ R18_AGC32, 0x37 },
+		{ R19_AGC33, 0x09 },
+		{ R1A_AGCK, 0x00 },
+		{ R1E_WI_FI, 0x29 },
+		{ R1F_RF_BPF, 0x06 },
+		{ R20_IR_MIX, 0xc6 },
+		{ R21_IF_AGC, 0x00 },
+		{ R2C_PS1, 0x75 },
+		{ R2D_PS2, 0x06 },
+		{ R2E_PS3, 0x07 },
+		{ R30_RSSI2, 0x0e },
+		{ R31_IRQ_CTRL, 0x00 },
+		{ R39_SD5, 0x00 },
+		{ R3B_REGU, 0x55 },
+		{ R3C_RCCAL1, 0xa7 },
+		{ R3F_IRCAL2, 0x85 },
+		{ R40_IRCAL3, 0x87 },
+		{ R41_IRCAL4, 0xc0 },
+		{ R43_PD1, 0x40 },
+		{ R44_PD2, 0xc0 },
+		{ R46_CPUMP, 0x0c },
+		{ R47_LNAPOL, 0x64 },
+		{ R4B_XTALOSC1, 0x30 },
+		{ R59_AGC2_UP2, 0x05 },
+		{ R5B_AGC_AUTO, 0x07 },
+		{ R5C_AGC_DEBUG, 0x00 },
+	};
+
+	/* crystal related regs depend on frequency */
+	static const u8 xtal_regs[][5] = {
+					/* reg:   4d    4e    4f    50    51 */
+		[TDA18250_XTAL_FREQ_16MHZ]  = { 0x3e, 0x80, 0x50, 0x00, 0x20 },
+		[TDA18250_XTAL_FREQ_24MHZ]  = { 0x5d, 0xc0, 0xec, 0x00, 0x18 },
+		[TDA18250_XTAL_FREQ_25MHZ]  = { 0x61, 0xa8, 0xec, 0x80, 0x19 },
+		[TDA18250_XTAL_FREQ_27MHZ]  = { 0x69, 0x78, 0x8d, 0x80, 0x1b },
+		[TDA18250_XTAL_FREQ_30MHZ]  = { 0x75, 0x30, 0x8f, 0x00, 0x1e },
+	};
+
+	dev_dbg(&client->dev, "\n");
+
+	ret = tda18250_power_control(fe, TDA18250_POWER_NORMAL);
+	if (ret)
+		goto err;
+
+	msleep(20);
+
+	if (dev->warm)
+		goto warm;
+
+	/* set initial register values */
+	for (i = 0; i < ARRAY_SIZE(init_regs); i++) {
+		ret = regmap_write(dev->regmap, init_regs[i][0],
+				init_regs[i][1]);
+		if (ret)
+			goto err;
+	}
+
+	/* set xtal related regs */
+	ret = regmap_bulk_write(dev->regmap, R4D_XTALFLX1,
+			xtal_regs[dev->xtal_freq], 5);
+	if (ret)
+		goto err;
+
+	ret = regmap_write_bits(dev->regmap, R10_LT1, 0x80,
+			dev->loopthrough ? 0x00 : 0x80);
+	if (ret)
+		goto err;
+
+	/* clear IRQ */
+	ret = regmap_write(dev->regmap, R0A_IRQ3, TDA18250_IRQ_HW_INIT);
+	if (ret)
+		goto err;
+
+	/* start HW init */
+	ret = regmap_write(dev->regmap, R2A_MSM1, 0x70);
+	if (ret)
+		goto err;
+
+	ret = regmap_write(dev->regmap, R2B_MSM2, 0x01);
+	if (ret)
+		goto err;
+
+	ret = tda18250_wait_for_irq(fe, 500, 10, TDA18250_IRQ_HW_INIT);
+	if (ret)
+		goto err;
+
+	/* tuner calibration */
+	ret = regmap_write(dev->regmap, R2A_MSM1, 0x02);
+	if (ret)
+		goto err;
+
+	ret = regmap_write(dev->regmap, R2B_MSM2, 0x01);
+	if (ret)
+		goto err;
+
+	ret = tda18250_wait_for_irq(fe, 500, 10, TDA18250_IRQ_CAL);
+	if (ret)
+		goto err;
+
+	dev->warm = true;
+
+warm:
+	/* power up LNA */
+	ret = regmap_write_bits(dev->regmap, R0C_AGC11, 0x80, 0x00);
+	if (ret)
+		goto err;
+
+	return 0;
+err:
+	dev_dbg(&client->dev, "failed=%d", ret);
+	return ret;
+}
+
+static int tda18250_set_agc(struct dvb_frontend *fe)
+{
+	struct i2c_client *client = fe->tuner_priv;
+	struct tda18250_dev *dev = i2c_get_clientdata(client);
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+	u8 utmp, utmp2;
+
+	dev_dbg(&client->dev, "\n");
+
+	ret = regmap_write_bits(dev->regmap, R1F_RF_BPF, 0x87, 0x06);
+	if (ret)
+		goto err;
+
+	utmp = ((c->frequency < 100000000) &&
+			((c->delivery_system == SYS_DVBC_ANNEX_A) ||
+			(c->delivery_system == SYS_DVBC_ANNEX_C)) &&
+			(c->bandwidth_hz == 6000000)) ? 0x80 : 0x00;
+	ret = regmap_write(dev->regmap, R5A_H3H5, utmp);
+	if (ret)
+		goto err;
+
+	/* AGC1 */
+	switch (c->delivery_system) {
+	case SYS_ATSC:
+	case SYS_DVBT:
+	case SYS_DVBT2:
+		utmp = 4;
+		break;
+	default: /* DVB-C/QAM */
+		switch (c->bandwidth_hz) {
+		case 6000000:
+			utmp = (c->frequency < 800000000) ? 6 : 4;
+			break;
+		default: /* 7.935 and 8 MHz */
+			utmp = (c->frequency < 100000000) ? 2 : 3;
+			break;
+		}
+		break;
+	}
+
+	ret = regmap_write_bits(dev->regmap, R0C_AGC11, 0x07, utmp);
+	if (ret)
+		goto err;
+
+	/* AGC2 */
+	switch (c->delivery_system) {
+	case SYS_ATSC:
+	case SYS_DVBT:
+	case SYS_DVBT2:
+		utmp = (c->frequency < 320000000) ? 20 : 16;
+		utmp2 = (c->frequency < 320000000) ? 22 : 18;
+		break;
+	default: /* DVB-C/QAM */
+		switch (c->bandwidth_hz) {
+		case 6000000:
+			if (c->frequency < 600000000) {
+				utmp = 18;
+				utmp2 = 22;
+			} else if (c->frequency < 800000000) {
+				utmp = 16;
+				utmp2 = 20;
+			} else {
+				utmp = 14;
+				utmp2 = 16;
+			}
+			break;
+		default: /* 7.935 and 8 MHz */
+			utmp = (c->frequency < 320000000) ? 16 : 18;
+			utmp2 = (c->frequency < 320000000) ? 18 : 20;
+			break;
+		}
+		break;
+	}
+	ret = regmap_write_bits(dev->regmap, R58_AGC2_UP1, 0x1f, utmp2+8);
+	if (ret)
+		goto err;
+	ret = regmap_write_bits(dev->regmap, R13_AGC22, 0x1f, utmp);
+	if (ret)
+		goto err;
+	ret = regmap_write_bits(dev->regmap, R14_AGC23, 0x1f, utmp2);
+	if (ret)
+		goto err;
+
+	switch (c->delivery_system) {
+	case SYS_ATSC:
+	case SYS_DVBT:
+	case SYS_DVBT2:
+		utmp = 98;
+		break;
+	default: /* DVB-C/QAM */
+		utmp = 90;
+		break;
+	}
+	ret = regmap_write_bits(dev->regmap, R16_AGC25, 0xf8, utmp);
+	if (ret)
+		goto err;
+
+	ret = regmap_write_bits(dev->regmap, R12_AGC21, 0x60,
+			(c->frequency > 800000000) ? 0x40 : 0x20);
+	if (ret)
+		goto err;
+
+	/* AGC3 */
+	switch (c->delivery_system) {
+	case SYS_ATSC:
+	case SYS_DVBT:
+	case SYS_DVBT2:
+		utmp = (c->frequency < 320000000) ? 5 : 7;
+		utmp2 = (c->frequency < 320000000) ? 10 : 12;
+		break;
+	default: /* DVB-C/QAM */
+		utmp = 7;
+		utmp2 = 12;
+		break;
+	}
+	ret = regmap_write(dev->regmap, R17_AGC31, (utmp << 4) | utmp2);
+	if (ret)
+		goto err;
+
+	/* S2D */
+	switch (c->delivery_system) {
+	case SYS_ATSC:
+	case SYS_DVBT:
+	case SYS_DVBT2:
+		if (c->bandwidth_hz == 8000000)
+			utmp = 0x04;
+		else
+			utmp = (c->frequency < 320000000) ? 0x04 : 0x02;
+		break;
+	default: /* DVB-C/QAM */
+		if (c->bandwidth_hz == 6000000)
+			utmp = ((c->frequency > 172544000) &&
+				(c->frequency < 320000000)) ? 0x04 : 0x02;
+		else /* 7.935 and 8 MHz */
+			utmp = ((c->frequency > 320000000) &&
+				(c->frequency < 600000000)) ? 0x02 : 0x04;
+		break;
+	}
+	ret = regmap_write_bits(dev->regmap, R20_IR_MIX, 0x06, utmp);
+	if (ret)
+		goto err;
+
+	switch (c->delivery_system) {
+	case SYS_ATSC:
+	case SYS_DVBT:
+	case SYS_DVBT2:
+		utmp = 0;
+		break;
+	default: /* DVB-C/QAM */
+		utmp = (c->frequency < 600000000) ? 0 : 3;
+		break;
+	}
+	ret = regmap_write_bits(dev->regmap, R16_AGC25, 0x03, utmp);
+	if (ret)
+		goto err;
+
+	utmp = 0x09;
+	switch (c->delivery_system) {
+	case SYS_ATSC:
+	case SYS_DVBT:
+	case SYS_DVBT2:
+		if (c->bandwidth_hz == 8000000)
+			utmp = 0x0c;
+		break;
+	default: /* DVB-C/QAM */
+		utmp = 0x0c;
+		break;
+	}
+	ret = regmap_write_bits(dev->regmap, R0F_AGC14, 0x3f, utmp);
+	if (ret)
+		goto err;
+
+	return 0;
+err:
+	dev_dbg(&client->dev, "failed=%d", ret);
+	return ret;
+}
+
+static int tda18250_pll_calc(struct dvb_frontend *fe, u8 *rdiv,
+		u8 *ndiv, u8 *icp)
+{
+	struct i2c_client *client = fe->tuner_priv;
+	struct tda18250_dev *dev = i2c_get_clientdata(client);
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	int ret;
+	unsigned int uval, exp, lopd, scale;
+	unsigned long fvco;
+
+	ret = regmap_read(dev->regmap, R34_MD1, &uval);
+	if (ret)
+		goto err;
+
+	exp = (uval & 0x70) >> 4;
+	if (exp > 5)
+		exp = 0;
+	lopd = 1 << (exp - 1);
+	scale = uval & 0x0f;
+	fvco = lopd * scale * ((c->frequency / 1000) + dev->if_frequency);
+
+	switch (dev->xtal_freq) {
+	case TDA18250_XTAL_FREQ_16MHZ:
+		*rdiv = 1;
+		*ndiv = 0;
+		*icp = (fvco < 6622000) ? 0x05 : 0x02;
+	break;
+	case TDA18250_XTAL_FREQ_24MHZ:
+	case TDA18250_XTAL_FREQ_25MHZ:
+		*rdiv = 3;
+		*ndiv = 1;
+		*icp = (fvco < 6622000) ? 0x05 : 0x02;
+	break;
+	case TDA18250_XTAL_FREQ_27MHZ:
+		if (fvco < 6643000) {
+			*rdiv = 2;
+			*ndiv = 0;
+			*icp = 0x05;
+		} else if (fvco < 6811000) {
+			*rdiv = 2;
+			*ndiv = 0;
+			*icp = 0x06;
+		} else {
+			*rdiv = 3;
+			*ndiv = 1;
+			*icp = 0x02;
+		}
+	break;
+	case TDA18250_XTAL_FREQ_30MHZ:
+		*rdiv = 2;
+		*ndiv = 0;
+		*icp = (fvco < 6811000) ? 0x05 : 0x02;
+	break;
+	default:
+		return -EINVAL;
+	}
+
+	dev_dbg(&client->dev,
+			"lopd=%d scale=%u fvco=%lu, rdiv=%d ndiv=%d icp=%d",
+			lopd, scale, fvco, *rdiv, *ndiv, *icp);
+	return 0;
+err:
+	return ret;
+}
+
+static int tda18250_set_params(struct dvb_frontend *fe)
+{
+	struct i2c_client *client = fe->tuner_priv;
+	struct tda18250_dev *dev = i2c_get_clientdata(client);
+	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
+	u32 if_khz;
+	int ret;
+	unsigned int i, j;
+	u8 utmp;
+	u8 buf[3];
+
+	#define REG      0
+	#define MASK     1
+	#define DVBT_6   2
+	#define DVBT_7   3
+	#define DVBT_8   4
+	#define DVBC_6   5
+	#define DVBC_8   6
+	#define ATSC     7
+
+	static const u8 delsys_params[][16] = {
+		[REG]    = { 0x22, 0x23, 0x24, 0x21, 0x0d, 0x0c, 0x0f, 0x14,
+			     0x0e, 0x12, 0x58, 0x59, 0x1a, 0x19, 0x1e, 0x30 },
+		[MASK]   = { 0x77, 0xff, 0xff, 0x87, 0xf0, 0x78, 0x07, 0xe0,
+			     0x60, 0x0f, 0x60, 0x0f, 0x33, 0x30, 0x80, 0x06 },
+		[DVBT_6] = { 0x51, 0x03, 0x83, 0x82, 0x40, 0x48, 0x01, 0xe0,
+			     0x60, 0x0f, 0x60, 0x05, 0x03, 0x10, 0x00, 0x04 },
+		[DVBT_7] = { 0x52, 0x03, 0x85, 0x82, 0x40, 0x48, 0x01, 0xe0,
+			     0x60, 0x0f, 0x60, 0x05, 0x03, 0x10, 0x00, 0x04 },
+		[DVBT_8] = { 0x53, 0x03, 0x87, 0x82, 0x40, 0x48, 0x06, 0xe0,
+			     0x60, 0x07, 0x60, 0x05, 0x03, 0x10, 0x00, 0x04 },
+		[DVBC_6] = { 0x32, 0x05, 0x86, 0x82, 0x50, 0x00, 0x06, 0x60,
+			     0x40, 0x0e, 0x60, 0x05, 0x33, 0x10, 0x00, 0x04 },
+		[DVBC_8] = { 0x53, 0x03, 0x88, 0x82, 0x50, 0x00, 0x06, 0x60,
+			     0x40, 0x0e, 0x60, 0x05, 0x33, 0x10, 0x00, 0x04 },
+		[ATSC]   = { 0x51, 0x03, 0x83, 0x82, 0x40, 0x48, 0x01, 0xe0,
+			     0x40, 0x0e, 0x60, 0x05, 0x03, 0x00, 0x80, 0x04 },
+	};
+
+	dev_dbg(&client->dev,
+			"delivery_system=%d frequency=%u bandwidth_hz=%u",
+			c->delivery_system, c->frequency, c->bandwidth_hz);
+
+
+	switch (c->delivery_system) {
+	case SYS_ATSC:
+		j = ATSC;
+		if_khz = dev->if_atsc;
+		break;
+	case SYS_DVBT:
+	case SYS_DVBT2:
+		if (c->bandwidth_hz == 0) {
+			ret = -EINVAL;
+			goto err;
+		} else if (c->bandwidth_hz <= 6000000) {
+			j = DVBT_6;
+			if_khz = dev->if_dvbt_6;
+		} else if (c->bandwidth_hz <= 7000000) {
+			j = DVBT_7;
+			if_khz = dev->if_dvbt_7;
+		} else if (c->bandwidth_hz <= 8000000) {
+			j = DVBT_8;
+			if_khz = dev->if_dvbt_8;
+		} else {
+			ret = -EINVAL;
+			goto err;
+		}
+		break;
+	case SYS_DVBC_ANNEX_A:
+	case SYS_DVBC_ANNEX_C:
+		if (c->bandwidth_hz == 0) {
+			ret = -EINVAL;
+			goto err;
+		} else if (c->bandwidth_hz <= 6000000) {
+			j = DVBC_6;
+			if_khz = dev->if_dvbc_6;
+		} else if (c->bandwidth_hz <= 8000000) {
+			j = DVBC_8;
+			if_khz = dev->if_dvbc_8;
+		} else {
+			ret = -EINVAL;
+			goto err;
+		}
+		break;
+	default:
+		ret = -EINVAL;
+		dev_err(&client->dev, "unsupported delivery system=%d",
+				c->delivery_system);
+		goto err;
+	}
+
+	/* set delivery system dependent registers */
+	for (i = 0; i < 16; i++) {
+		ret = regmap_write_bits(dev->regmap, delsys_params[REG][i],
+			 delsys_params[MASK][i],  delsys_params[j][i]);
+		if (ret)
+			goto err;
+	}
+
+	/* set IF if needed */
+	if (dev->if_frequency != if_khz) {
+		utmp = DIV_ROUND_CLOSEST(if_khz, 50);
+		ret = regmap_write(dev->regmap, R26_IF, utmp);
+		if (ret)
+			goto err;
+		dev->if_frequency = if_khz;
+		dev_dbg(&client->dev, "set IF=%u kHz", if_khz);
+
+	}
+
+	ret = tda18250_set_agc(fe);
+	if (ret)
+		goto err;
+
+	ret = regmap_write_bits(dev->regmap, R1A_AGCK, 0x03, 0x01);
+	if (ret)
+		goto err;
+
+	ret = regmap_write_bits(dev->regmap, R14_AGC23, 0x40, 0x00);
+	if (ret)
+		goto err;
+
+	/* set frequency */
+	buf[0] = ((c->frequency / 1000) >> 16) & 0xff;
+	buf[1] = ((c->frequency / 1000) >>  8) & 0xff;
+	buf[2] = ((c->frequency / 1000) >>  0) & 0xff;
+	ret = regmap_bulk_write(dev->regmap, R27_RF1, buf, 3);
+	if (ret)
+		goto err;
+
+	ret = regmap_write(dev->regmap, R0A_IRQ3, TDA18250_IRQ_TUNE);
+	if (ret)
+		goto err;
+
+	/* initial tune */
+	ret = regmap_write(dev->regmap, R2A_MSM1, 0x01);
+	if (ret)
+		goto err;
+
+	ret = regmap_write(dev->regmap, R2B_MSM2, 0x01);
+	if (ret)
+		goto err;
+
+	ret = tda18250_wait_for_irq(fe, 500, 10, TDA18250_IRQ_TUNE);
+	if (ret)
+		goto err;
+
+	/* calc ndiv and rdiv */
+	ret = tda18250_pll_calc(fe, &buf[0], &buf[1], &buf[2]);
+	if (ret)
+		goto err;
+
+	ret = regmap_write_bits(dev->regmap, R4F_XTALFLX3, 0xe0,
+			(buf[0] << 6) | (buf[1] << 5));
+	if (ret)
+		goto err;
+
+	/* clear IRQ */
+	ret = regmap_write(dev->regmap, R0A_IRQ3, TDA18250_IRQ_TUNE);
+	if (ret)
+		goto err;
+
+	ret = regmap_write_bits(dev->regmap, R46_CPUMP, 0x07, 0x00);
+	if (ret)
+		goto err;
+
+	ret = regmap_write_bits(dev->regmap, R39_SD5, 0x03, 0x00);
+	if (ret)
+		goto err;
+
+	/* tune again */
+	ret = regmap_write(dev->regmap, R2A_MSM1, 0x01); /* tune */
+	if (ret)
+		goto err;
+
+	ret = regmap_write(dev->regmap, R2B_MSM2, 0x01); /* go */
+	if (ret)
+		goto err;
+
+	ret = tda18250_wait_for_irq(fe, 500, 10, TDA18250_IRQ_TUNE);
+	if (ret)
+		goto err;
+
+	/* pll locking */
+	msleep(20);
+
+	ret = regmap_write_bits(dev->regmap, R2B_MSM2, 0x04, 0x04);
+	if (ret)
+		goto err;
+
+	msleep(20);
+
+	/* restore AGCK */
+	ret = regmap_write_bits(dev->regmap, R1A_AGCK, 0x03, 0x03);
+	if (ret)
+		goto err;
+
+	ret = regmap_write_bits(dev->regmap, R14_AGC23, 0x40, 0x40);
+	if (ret)
+		goto err;
+
+	/* charge pump */
+	ret = regmap_write_bits(dev->regmap, R46_CPUMP, 0x07, buf[2]);
+
+	return 0;
+err:
+	return ret;
+}
+
+static int tda18250_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
+{
+	struct i2c_client *client = fe->tuner_priv;
+	struct tda18250_dev *dev = i2c_get_clientdata(client);
+
+	*frequency = dev->if_frequency * 1000;
+	return 0;
+}
+
+static int tda18250_sleep(struct dvb_frontend *fe)
+{
+	struct i2c_client *client = fe->tuner_priv;
+	struct tda18250_dev *dev = i2c_get_clientdata(client);
+	int ret;
+
+	dev_dbg(&client->dev, "\n");
+
+	/* power down LNA */
+	ret = regmap_write_bits(dev->regmap, R0C_AGC11, 0x80, 0x00);
+	if (ret)
+		return ret;
+
+	/* set if freq to 0 in order to make sure it's set after wake up */
+	dev->if_frequency = 0;
+
+	ret = tda18250_power_control(fe, TDA18250_POWER_STANDBY);
+	return ret;
+}
+
+static const struct dvb_tuner_ops tda18250_ops = {
+	.info = {
+		.name           = "NXP TDA18250",
+		.frequency_min  = 42000000,
+		.frequency_max  = 870000000,
+	},
+
+	.init = tda18250_init,
+	.set_params = tda18250_set_params,
+	.get_if_frequency = tda18250_get_if_frequency,
+	.sleep = tda18250_sleep,
+};
+
+static int tda18250_probe(struct i2c_client *client,
+		const struct i2c_device_id *id)
+{
+	struct tda18250_config *cfg = client->dev.platform_data;
+	struct dvb_frontend *fe = cfg->fe;
+	struct tda18250_dev *dev;
+	int ret;
+	unsigned char chip_id[3];
+
+	/* some registers are always read from HW */
+	static const struct regmap_range tda18250_yes_ranges[] = {
+		regmap_reg_range(R05_POWER1, R0B_IRQ4),
+		regmap_reg_range(R21_IF_AGC, R21_IF_AGC),
+		regmap_reg_range(R2A_MSM1, R2B_MSM2),
+		regmap_reg_range(R2F_RSSI1, R31_IRQ_CTRL),
+	};
+
+	static const struct regmap_access_table tda18250_volatile_table = {
+		.yes_ranges = tda18250_yes_ranges,
+		.n_yes_ranges = ARRAY_SIZE(tda18250_yes_ranges),
+	};
+
+	static const struct regmap_config tda18250_regmap_config = {
+		.reg_bits = 8,
+		.val_bits = 8,
+		.max_register = TDA18250_NUM_REGS - 1,
+		.volatile_table = &tda18250_volatile_table,
+	};
+
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	i2c_set_clientdata(client, dev);
+
+	dev->fe = cfg->fe;
+	dev->loopthrough = cfg->loopthrough;
+	if (cfg->xtal_freq < TDA18250_XTAL_FREQ_MAX) {
+		dev->xtal_freq = cfg->xtal_freq;
+	} else {
+		ret = -EINVAL;
+		dev_err(&client->dev, "xtal_freq invalid=%d", cfg->xtal_freq);
+		goto err_kfree;
+	}
+	dev->if_dvbt_6 = cfg->if_dvbt_6;
+	dev->if_dvbt_7 = cfg->if_dvbt_7;
+	dev->if_dvbt_8 = cfg->if_dvbt_8;
+	dev->if_dvbc_6 = cfg->if_dvbc_6;
+	dev->if_dvbc_8 = cfg->if_dvbc_8;
+	dev->if_atsc = cfg->if_atsc;
+
+	dev->if_frequency = 0;
+	dev->warm = false;
+
+	dev->regmap = devm_regmap_init_i2c(client, &tda18250_regmap_config);
+	if (IS_ERR(dev->regmap)) {
+		ret = PTR_ERR(dev->regmap);
+		goto err_kfree;
+	}
+
+	/* read the three chip ID registers */
+	regmap_bulk_read(dev->regmap, R00_ID1, &chip_id, 3);
+	dev_dbg(&client->dev, "chip_id=%02x:%02x:%02x",
+			chip_id[0], chip_id[1], chip_id[2]);
+
+	switch (chip_id[0]) {
+	case 0xc7:
+		dev->slave = false;
+		break;
+	case 0x47:
+		dev->slave = true;
+		break;
+	default:
+		ret = -ENODEV;
+		goto err_kfree;
+	}
+
+	if (chip_id[1] != 0x4a) {
+		ret = -ENODEV;
+		goto err_kfree;
+	}
+
+	switch (chip_id[2]) {
+	case 0x20:
+		dev_info(&client->dev,
+				"NXP TDA18250AHN/%s successfully identified",
+				dev->slave ? "S" : "M");
+		break;
+	case 0x21:
+		dev_info(&client->dev,
+				"NXP TDA18250BHN/%s successfully identified",
+				dev->slave ? "S" : "M");
+		break;
+	default:
+		ret = -ENODEV;
+		goto err_kfree;
+	}
+
+	fe->tuner_priv = client;
+	memcpy(&fe->ops.tuner_ops, &tda18250_ops,
+			sizeof(struct dvb_tuner_ops));
+
+	/* put the tuner in standby */
+	tda18250_power_control(fe, TDA18250_POWER_STANDBY);
+
+	return 0;
+err_kfree:
+	kfree(dev);
+err:
+	dev_dbg(&client->dev, "failed=%d", ret);
+	return ret;
+}
+
+static int tda18250_remove(struct i2c_client *client)
+{
+	struct tda18250_dev *dev = i2c_get_clientdata(client);
+	struct dvb_frontend *fe = dev->fe;
+
+	dev_dbg(&client->dev, "\n");
+
+	memset(&fe->ops.tuner_ops, 0, sizeof(struct dvb_tuner_ops));
+	fe->tuner_priv = NULL;
+	kfree(dev);
+
+	return 0;
+}
+
+static const struct i2c_device_id tda18250_id_table[] = {
+	{"tda18250", 0},
+	{}
+};
+MODULE_DEVICE_TABLE(i2c, tda18250_id_table);
+
+static struct i2c_driver tda18250_driver = {
+	.driver = {
+		.name	= "tda18250",
+	},
+	.probe		= tda18250_probe,
+	.remove		= tda18250_remove,
+	.id_table	= tda18250_id_table,
+};
+
+module_i2c_driver(tda18250_driver);
+
+MODULE_DESCRIPTION("NXP TDA18250 silicon tuner driver");
+MODULE_AUTHOR("Olli Salonen <olli.salonen@iki.fi>");
+MODULE_LICENSE("GPL");