drivers/media/tuners/fc0011.c - vendor/opensource/backports - Git at Google

 /*
  * Fitipower FC0011 tuner driver
  *
  * Copyright (C) 2012 Michael Buesch <m@bues.ch>
  *
  * Derived from FC0012 tuner driver:
  * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net>
  *
  * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  */

 #include "fc0011.h"


 /* Tuner registers */
 enum {
 	FC11_REG_0,
 	FC11_REG_FA,		/* FA */
 	FC11_REG_FP,		/* FP */
 	FC11_REG_XINHI,		/* XIN high 8 bit */
 	FC11_REG_XINLO,		/* XIN low 8 bit */
 	FC11_REG_VCO,		/* VCO */
 	FC11_REG_VCOSEL,	/* VCO select */
 	FC11_REG_7,		/* Unknown tuner reg 7 */
 	FC11_REG_8,		/* Unknown tuner reg 8 */
 	FC11_REG_9,
 	FC11_REG_10,		/* Unknown tuner reg 10 */
 	FC11_REG_11,		/* Unknown tuner reg 11 */
 	FC11_REG_12,
 	FC11_REG_RCCAL,		/* RC calibrate */
 	FC11_REG_VCOCAL,	/* VCO calibrate */
 	FC11_REG_15,
 	FC11_REG_16,		/* Unknown tuner reg 16 */
 	FC11_REG_17,

 	FC11_NR_REGS,		/* Number of registers */
 };

 enum FC11_REG_VCOSEL_bits {
 	FC11_VCOSEL_2		= 0x08, /* VCO select 2 */
 	FC11_VCOSEL_1		= 0x10, /* VCO select 1 */
 	FC11_VCOSEL_CLKOUT	= 0x20, /* Fix clock out */
 	FC11_VCOSEL_BW7M	= 0x40, /* 7MHz bw */
 	FC11_VCOSEL_BW6M	= 0x80, /* 6MHz bw */
 };

 enum FC11_REG_RCCAL_bits {
 	FC11_RCCAL_FORCE	= 0x10, /* force */
 };

 enum FC11_REG_VCOCAL_bits {
 	FC11_VCOCAL_RUN		= 0,	/* VCO calibration run */
 	FC11_VCOCAL_VALUEMASK	= 0x3F,	/* VCO calibration value mask */
 	FC11_VCOCAL_OK		= 0x40,	/* VCO calibration Ok */
 	FC11_VCOCAL_RESET	= 0x80, /* VCO calibration reset */
 };


 struct fc0011_priv {
 	struct i2c_adapter *i2c;
 	u8 addr;

 	u32 frequency;
 	u32 bandwidth;
 };


 static int fc0011_writereg(struct fc0011_priv *priv, u8 reg, u8 val)
 {
 	u8 buf[2] = { reg, val };
 	struct i2c_msg msg = { .addr = priv->addr,
 		.flags = 0, .buf = buf, .len = 2 };

 	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
 		dev_err(&priv->i2c->dev,
 			"I2C write reg failed, reg: %02x, val: %02x\n",
 			reg, val);
 		return -EIO;
 	}

 	return 0;
 }

 static int fc0011_readreg(struct fc0011_priv *priv, u8 reg, u8 *val)
 {
 	u8 dummy;
 	struct i2c_msg msg[2] = {
 		{ .addr = priv->addr,
 		  .flags = 0, .buf = &reg, .len = 1 },
 		{ .addr = priv->addr,
 		  .flags = I2C_M_RD, .buf = val ? : &dummy, .len = 1 },
 	};

 	if (i2c_transfer(priv->i2c, msg, 2) != 2) {
 		dev_err(&priv->i2c->dev,
 			"I2C read failed, reg: %02x\n", reg);
 		return -EIO;
 	}

 	return 0;
 }

 static int fc0011_release(struct dvb_frontend *fe)
 {
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;

 	return 0;
 }

 static int fc0011_init(struct dvb_frontend *fe)
 {
 	struct fc0011_priv *priv = fe->tuner_priv;
 	int err;

 	if (WARN_ON(!fe->callback))
 		return -EINVAL;

 	err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 			   FC0011_FE_CALLBACK_POWER, priv->addr);
 	if (err) {
 		dev_err(&priv->i2c->dev, "Power-on callback failed\n");
 		return err;
 	}
 	err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 			   FC0011_FE_CALLBACK_RESET, priv->addr);
 	if (err) {
 		dev_err(&priv->i2c->dev, "Reset callback failed\n");
 		return err;
 	}

 	return 0;
 }

 /* Initiate VCO calibration */
 static int fc0011_vcocal_trigger(struct fc0011_priv *priv)
 {
 	int err;

 	err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RESET);
 	if (err)
 		return err;
 	err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RUN);
 	if (err)
 		return err;

 	return 0;
 }

 /* Read VCO calibration value */
 static int fc0011_vcocal_read(struct fc0011_priv *priv, u8 *value)
 {
 	int err;

 	err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RUN);
 	if (err)
 		return err;
 	usleep_range(10000, 20000);
 	err = fc0011_readreg(priv, FC11_REG_VCOCAL, value);
 	if (err)
 		return err;

 	return 0;
 }

 static int fc0011_set_params(struct dvb_frontend *fe)
 {
 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 	struct fc0011_priv *priv = fe->tuner_priv;
 	int err;
 	unsigned int i, vco_retries;
 	u32 freq = p->frequency / 1000;
 	u32 bandwidth = p->bandwidth_hz / 1000;
 	u32 fvco, xin, frac, xdiv, xdivr;
 	u8 fa, fp, vco_sel, vco_cal;
 	u8 regs[FC11_NR_REGS] = { };

 	regs[FC11_REG_7] = 0x0F;
 	regs[FC11_REG_8] = 0x3E;
 	regs[FC11_REG_10] = 0xB8;
 	regs[FC11_REG_11] = 0x80;
 	regs[FC11_REG_RCCAL] = 0x04;
 	err = fc0011_writereg(priv, FC11_REG_7, regs[FC11_REG_7]);
 	err |= fc0011_writereg(priv, FC11_REG_8, regs[FC11_REG_8]);
 	err |= fc0011_writereg(priv, FC11_REG_10, regs[FC11_REG_10]);
 	err |= fc0011_writereg(priv, FC11_REG_11, regs[FC11_REG_11]);
 	err |= fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);
 	if (err)
 		return -EIO;

 	/* Set VCO freq and VCO div */
 	if (freq < 54000) {
 		fvco = freq * 64;
 		regs[FC11_REG_VCO] = 0x82;
 	} else if (freq < 108000) {
 		fvco = freq * 32;
 		regs[FC11_REG_VCO] = 0x42;
 	} else if (freq < 216000) {
 		fvco = freq * 16;
 		regs[FC11_REG_VCO] = 0x22;
 	} else if (freq < 432000) {
 		fvco = freq * 8;
 		regs[FC11_REG_VCO] = 0x12;
 	} else {
 		fvco = freq * 4;
 		regs[FC11_REG_VCO] = 0x0A;
 	}

 	/* Calc XIN. The PLL reference frequency is 18 MHz. */
 	xdiv = fvco / 18000;
 	WARN_ON(xdiv > 0xFF);
 	frac = fvco - xdiv * 18000;
 	frac = (frac << 15) / 18000;
 	if (frac >= 16384)
 		frac += 32786;
 	if (!frac)
 		xin = 0;
 	else
 		xin = clamp_t(u32, frac, 512, 65024);
 	regs[FC11_REG_XINHI] = xin >> 8;
 	regs[FC11_REG_XINLO] = xin;

 	/* Calc FP and FA */
 	xdivr = xdiv;
 	if (fvco - xdiv * 18000 >= 9000)
 		xdivr += 1; /* round */
 	fp = xdivr / 8;
 	fa = xdivr - fp * 8;
 	if (fa < 2) {
 		fp -= 1;
 		fa += 8;
 	}
 	if (fp > 0x1F) {
 		fp = 0x1F;
 		fa = 0xF;
 	}
 	if (fa >= fp) {
 		dev_warn(&priv->i2c->dev,
 			 "fa %02X >= fp %02X, but trying to continue\n",
 			 (unsigned int)(u8)fa, (unsigned int)(u8)fp);
 	}
 	regs[FC11_REG_FA] = fa;
 	regs[FC11_REG_FP] = fp;

 	/* Select bandwidth */
 	switch (bandwidth) {
 	case 8000:
 		break;
 	case 7000:
 		regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_BW7M;
 		break;
 	default:
 		dev_warn(&priv->i2c->dev, "Unsupported bandwidth %u kHz. "
 			 "Using 6000 kHz.\n",
 			 bandwidth);
 		bandwidth = 6000;
 		/* fallthrough */
 	case 6000:
 		regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_BW6M;
 		break;
 	}

 	/* Pre VCO select */
 	if (fvco < 2320000) {
 		vco_sel = 0;
 		regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 	} else if (fvco < 3080000) {
 		vco_sel = 1;
 		regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 		regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;
 	} else {
 		vco_sel = 2;
 		regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 		regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2;
 	}

 	/* Fix for low freqs */
 	if (freq < 45000) {
 		regs[FC11_REG_FA] = 0x6;
 		regs[FC11_REG_FP] = 0x11;
 	}

 	/* Clock out fix */
 	regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_CLKOUT;

 	/* Write the cached registers */
 	for (i = FC11_REG_FA; i <= FC11_REG_VCOSEL; i++) {
 		err = fc0011_writereg(priv, i, regs[i]);
 		if (err)
 			return err;
 	}

 	/* VCO calibration */
 	err = fc0011_vcocal_trigger(priv);
 	if (err)
 		return err;
 	err = fc0011_vcocal_read(priv, &vco_cal);
 	if (err)
 		return err;
 	vco_retries = 0;
 	while (!(vco_cal & FC11_VCOCAL_OK) && vco_retries < 3) {
 		/* Reset the tuner and try again */
 		err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 				   FC0011_FE_CALLBACK_RESET, priv->addr);
 		if (err) {
 			dev_err(&priv->i2c->dev, "Failed to reset tuner\n");
 			return err;
 		}
 		/* Reinit tuner config */
 		err = 0;
 		for (i = FC11_REG_FA; i <= FC11_REG_VCOSEL; i++)
 			err |= fc0011_writereg(priv, i, regs[i]);
 		err |= fc0011_writereg(priv, FC11_REG_7, regs[FC11_REG_7]);
 		err |= fc0011_writereg(priv, FC11_REG_8, regs[FC11_REG_8]);
 		err |= fc0011_writereg(priv, FC11_REG_10, regs[FC11_REG_10]);
 		err |= fc0011_writereg(priv, FC11_REG_11, regs[FC11_REG_11]);
 		err |= fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);
 		if (err)
 			return -EIO;
 		/* VCO calibration */
 		err = fc0011_vcocal_trigger(priv);
 		if (err)
 			return err;
 		err = fc0011_vcocal_read(priv, &vco_cal);
 		if (err)
 			return err;
 		vco_retries++;
 	}
 	if (!(vco_cal & FC11_VCOCAL_OK)) {
 		dev_err(&priv->i2c->dev,
 			"Failed to read VCO calibration value (got %02X)\n",
 			(unsigned int)vco_cal);
 		return -EIO;
 	}
 	vco_cal &= FC11_VCOCAL_VALUEMASK;

 	switch (vco_sel) {
 	default:
 		WARN_ON(1);
 	case 0:
 		if (vco_cal < 8) {
 			regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 			regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;
 			err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 					      regs[FC11_REG_VCOSEL]);
 			if (err)
 				return err;
 			err = fc0011_vcocal_trigger(priv);
 			if (err)
 				return err;
 		} else {
 			regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 			err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 					      regs[FC11_REG_VCOSEL]);
 			if (err)
 				return err;
 		}
 		break;
 	case 1:
 		if (vco_cal < 5) {
 			regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 			regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2;
 			err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 					      regs[FC11_REG_VCOSEL]);
 			if (err)
 				return err;
 			err = fc0011_vcocal_trigger(priv);
 			if (err)
 				return err;
 		} else if (vco_cal <= 48) {
 			regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 			regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;
 			err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 					      regs[FC11_REG_VCOSEL]);
 			if (err)
 				return err;
 		} else {
 			regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 			err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 					      regs[FC11_REG_VCOSEL]);
 			if (err)
 				return err;
 			err = fc0011_vcocal_trigger(priv);
 			if (err)
 				return err;
 		}
 		break;
 	case 2:
 		if (vco_cal > 53) {
 			regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 			regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;
 			err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 					      regs[FC11_REG_VCOSEL]);
 			if (err)
 				return err;
 			err = fc0011_vcocal_trigger(priv);
 			if (err)
 				return err;
 		} else {
 			regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 			regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2;
 			err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 					      regs[FC11_REG_VCOSEL]);
 			if (err)
 				return err;
 		}
 		break;
 	}
 	err = fc0011_vcocal_read(priv, NULL);
 	if (err)
 		return err;
 	usleep_range(10000, 50000);

 	err = fc0011_readreg(priv, FC11_REG_RCCAL, &regs[FC11_REG_RCCAL]);
 	if (err)
 		return err;
 	regs[FC11_REG_RCCAL] |= FC11_RCCAL_FORCE;
 	err = fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);
 	if (err)
 		return err;
 	regs[FC11_REG_16] = 0xB;
 	err = fc0011_writereg(priv, FC11_REG_16, regs[FC11_REG_16]);
 	if (err)
 		return err;

 	dev_dbg(&priv->i2c->dev, "Tuned to "
 		"fa=%02X fp=%02X xin=%02X%02X vco=%02X vcosel=%02X "
 		"vcocal=%02X(%u) bw=%u\n",
 		(unsigned int)regs[FC11_REG_FA],
 		(unsigned int)regs[FC11_REG_FP],
 		(unsigned int)regs[FC11_REG_XINHI],
 		(unsigned int)regs[FC11_REG_XINLO],
 		(unsigned int)regs[FC11_REG_VCO],
 		(unsigned int)regs[FC11_REG_VCOSEL],
 		(unsigned int)vco_cal, vco_retries,
 		(unsigned int)bandwidth);

 	priv->frequency = p->frequency;
 	priv->bandwidth = p->bandwidth_hz;

 	return 0;
 }

 static int fc0011_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 {
 	struct fc0011_priv *priv = fe->tuner_priv;

 	*frequency = priv->frequency;

 	return 0;
 }

 static int fc0011_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 {
 	*frequency = 0;

 	return 0;
 }

 static int fc0011_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
 {
 	struct fc0011_priv *priv = fe->tuner_priv;

 	*bandwidth = priv->bandwidth;

 	return 0;
 }

 static const struct dvb_tuner_ops fc0011_tuner_ops = {
 	.info = {
 		.name		= "Fitipower FC0011",

 		.frequency_min	= 45000000,
 		.frequency_max	= 1000000000,
 	},

 	.release		= fc0011_release,
 	.init			= fc0011_init,

 	.set_params		= fc0011_set_params,

 	.get_frequency		= fc0011_get_frequency,
 	.get_if_frequency	= fc0011_get_if_frequency,
 	.get_bandwidth		= fc0011_get_bandwidth,
 };

 struct dvb_frontend *fc0011_attach(struct dvb_frontend *fe,
 				   struct i2c_adapter *i2c,
 				   const struct fc0011_config *config)
 {
 	struct fc0011_priv *priv;

 	priv = kzalloc(sizeof(struct fc0011_priv), GFP_KERNEL);
 	if (!priv)
 		return NULL;

 	priv->i2c = i2c;
 	priv->addr = config->i2c_address;

 	fe->tuner_priv = priv;
 	fe->ops.tuner_ops = fc0011_tuner_ops;

 	dev_info(&priv->i2c->dev, "Fitipower FC0011 tuner attached\n");

 	return fe;
 }
 EXPORT_SYMBOL(fc0011_attach);

 MODULE_DESCRIPTION("Fitipower FC0011 silicon tuner driver");
 MODULE_AUTHOR("Michael Buesch <m@bues.ch>");
 MODULE_LICENSE("GPL");
	/*
	* Fitipower FC0011 tuner driver
	*
	* Copyright (C) 2012 Michael Buesch <m@bues.ch>
	*
	* Derived from FC0012 tuner driver:
	* Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net>
	*
	* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
	*/

	#include "fc0011.h"


	/* Tuner registers */
	enum {
	FC11_REG_0,
	FC11_REG_FA, /* FA */
	FC11_REG_FP, /* FP */
	FC11_REG_XINHI, /* XIN high 8 bit */
	FC11_REG_XINLO, /* XIN low 8 bit */
	FC11_REG_VCO, /* VCO */
	FC11_REG_VCOSEL, /* VCO select */
	FC11_REG_7, /* Unknown tuner reg 7 */
	FC11_REG_8, /* Unknown tuner reg 8 */
	FC11_REG_9,
	FC11_REG_10, /* Unknown tuner reg 10 */
	FC11_REG_11, /* Unknown tuner reg 11 */
	FC11_REG_12,
	FC11_REG_RCCAL, /* RC calibrate */
	FC11_REG_VCOCAL, /* VCO calibrate */
	FC11_REG_15,
	FC11_REG_16, /* Unknown tuner reg 16 */
	FC11_REG_17,

	FC11_NR_REGS, /* Number of registers */
	};

	enum FC11_REG_VCOSEL_bits {
	FC11_VCOSEL_2 = 0x08, /* VCO select 2 */
	FC11_VCOSEL_1 = 0x10, /* VCO select 1 */
	FC11_VCOSEL_CLKOUT = 0x20, /* Fix clock out */
	FC11_VCOSEL_BW7M = 0x40, /* 7MHz bw */
	FC11_VCOSEL_BW6M = 0x80, /* 6MHz bw */
	};

	enum FC11_REG_RCCAL_bits {
	FC11_RCCAL_FORCE = 0x10, /* force */
	};

	enum FC11_REG_VCOCAL_bits {
	FC11_VCOCAL_RUN = 0, /* VCO calibration run */
	FC11_VCOCAL_VALUEMASK = 0x3F, /* VCO calibration value mask */
	FC11_VCOCAL_OK = 0x40, /* VCO calibration Ok */
	FC11_VCOCAL_RESET = 0x80, /* VCO calibration reset */
	};


	struct fc0011_priv {
	struct i2c_adapter *i2c;
	u8 addr;

	u32 frequency;
	u32 bandwidth;
	};


	static int fc0011_writereg(struct fc0011_priv *priv, u8 reg, u8 val)
	{
	u8 buf[2] = { reg, val };
	struct i2c_msg msg = { .addr = priv->addr,
	.flags = 0, .buf = buf, .len = 2 };

	if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
	dev_err(&priv->i2c->dev,
	"I2C write reg failed, reg: %02x, val: %02x\n",
	reg, val);
	return -EIO;
	}

	return 0;
	}

	static int fc0011_readreg(struct fc0011_priv priv, u8 reg, u8 val)
	{
	u8 dummy;
	struct i2c_msg msg[2] = {
	{ .addr = priv->addr,
	.flags = 0, .buf = &reg, .len = 1 },
	{ .addr = priv->addr,
	.flags = I2C_M_RD, .buf = val ? : &dummy, .len = 1 },
	};

	if (i2c_transfer(priv->i2c, msg, 2) != 2) {
	dev_err(&priv->i2c->dev,
	"I2C read failed, reg: %02x\n", reg);
	return -EIO;
	}

	return 0;
	}

	static int fc0011_release(struct dvb_frontend *fe)
	{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;

	return 0;
	}

	static int fc0011_init(struct dvb_frontend *fe)
	{
	struct fc0011_priv *priv = fe->tuner_priv;
	int err;

	if (WARN_ON(!fe->callback))
	return -EINVAL;

	err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
	FC0011_FE_CALLBACK_POWER, priv->addr);
	if (err) {
	dev_err(&priv->i2c->dev, "Power-on callback failed\n");
	return err;
	}
	err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
	FC0011_FE_CALLBACK_RESET, priv->addr);
	if (err) {
	dev_err(&priv->i2c->dev, "Reset callback failed\n");
	return err;
	}

	return 0;
	}

	/* Initiate VCO calibration */
	static int fc0011_vcocal_trigger(struct fc0011_priv *priv)
	{
	int err;

	err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RESET);
	if (err)
	return err;
	err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RUN);
	if (err)
	return err;

	return 0;
	}

	/* Read VCO calibration value */
	static int fc0011_vcocal_read(struct fc0011_priv priv, u8 value)
	{
	int err;

	err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RUN);
	if (err)
	return err;
	usleep_range(10000, 20000);
	err = fc0011_readreg(priv, FC11_REG_VCOCAL, value);
	if (err)
	return err;

	return 0;
	}

	static int fc0011_set_params(struct dvb_frontend *fe)
	{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct fc0011_priv *priv = fe->tuner_priv;
	int err;
	unsigned int i, vco_retries;
	u32 freq = p->frequency / 1000;
	u32 bandwidth = p->bandwidth_hz / 1000;
	u32 fvco, xin, frac, xdiv, xdivr;
	u8 fa, fp, vco_sel, vco_cal;
	u8 regs[FC11_NR_REGS] = { };

	regs[FC11_REG_7] = 0x0F;
	regs[FC11_REG_8] = 0x3E;
	regs[FC11_REG_10] = 0xB8;
	regs[FC11_REG_11] = 0x80;
	regs[FC11_REG_RCCAL] = 0x04;
	err = fc0011_writereg(priv, FC11_REG_7, regs[FC11_REG_7]);
	err \|= fc0011_writereg(priv, FC11_REG_8, regs[FC11_REG_8]);
	err \|= fc0011_writereg(priv, FC11_REG_10, regs[FC11_REG_10]);
	err \|= fc0011_writereg(priv, FC11_REG_11, regs[FC11_REG_11]);
	err \|= fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);
	if (err)
	return -EIO;

	/* Set VCO freq and VCO div */
	if (freq < 54000) {
	fvco = freq * 64;
	regs[FC11_REG_VCO] = 0x82;
	} else if (freq < 108000) {
	fvco = freq * 32;
	regs[FC11_REG_VCO] = 0x42;
	} else if (freq < 216000) {
	fvco = freq * 16;
	regs[FC11_REG_VCO] = 0x22;
	} else if (freq < 432000) {
	fvco = freq * 8;
	regs[FC11_REG_VCO] = 0x12;
	} else {
	fvco = freq * 4;
	regs[FC11_REG_VCO] = 0x0A;
	}

	/* Calc XIN. The PLL reference frequency is 18 MHz. */
	xdiv = fvco / 18000;
	WARN_ON(xdiv > 0xFF);
	frac = fvco - xdiv * 18000;
	frac = (frac << 15) / 18000;
	if (frac >= 16384)
	frac += 32786;
	if (!frac)
	xin = 0;
	else
	xin = clamp_t(u32, frac, 512, 65024);
	regs[FC11_REG_XINHI] = xin >> 8;
	regs[FC11_REG_XINLO] = xin;

	/* Calc FP and FA */
	xdivr = xdiv;
	if (fvco - xdiv * 18000 >= 9000)
	xdivr += 1; /* round */
	fp = xdivr / 8;
	fa = xdivr - fp * 8;
	if (fa < 2) {
	fp -= 1;
	fa += 8;
	}
	if (fp > 0x1F) {
	fp = 0x1F;
	fa = 0xF;
	}
	if (fa >= fp) {
	dev_warn(&priv->i2c->dev,
	"fa %02X >= fp %02X, but trying to continue\n",
	(unsigned int)(u8)fa, (unsigned int)(u8)fp);
	}
	regs[FC11_REG_FA] = fa;
	regs[FC11_REG_FP] = fp;

	/* Select bandwidth */
	switch (bandwidth) {
	case 8000:
	break;
	case 7000:
	regs[FC11_REG_VCOSEL] \|= FC11_VCOSEL_BW7M;
	break;
	default:
	dev_warn(&priv->i2c->dev, "Unsupported bandwidth %u kHz. "
	"Using 6000 kHz.\n",
	bandwidth);
	bandwidth = 6000;
	/* fallthrough */
	case 6000:
	regs[FC11_REG_VCOSEL] \|= FC11_VCOSEL_BW6M;
	break;
	}

	/* Pre VCO select */
	if (fvco < 2320000) {
	vco_sel = 0;
	regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 \| FC11_VCOSEL_2);
	} else if (fvco < 3080000) {
	vco_sel = 1;
	regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 \| FC11_VCOSEL_2);
	regs[FC11_REG_VCOSEL] \|= FC11_VCOSEL_1;
	} else {
	vco_sel = 2;
	regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 \| FC11_VCOSEL_2);
	regs[FC11_REG_VCOSEL] \|= FC11_VCOSEL_2;
	}

	/* Fix for low freqs */
	if (freq < 45000) {
	regs[FC11_REG_FA] = 0x6;
	regs[FC11_REG_FP] = 0x11;
	}

	/* Clock out fix */
	regs[FC11_REG_VCOSEL] \|= FC11_VCOSEL_CLKOUT;

	/* Write the cached registers */
	for (i = FC11_REG_FA; i <= FC11_REG_VCOSEL; i++) {
	err = fc0011_writereg(priv, i, regs[i]);
	if (err)
	return err;
	}

	/* VCO calibration */
	err = fc0011_vcocal_trigger(priv);
	if (err)
	return err;
	err = fc0011_vcocal_read(priv, &vco_cal);
	if (err)
	return err;
	vco_retries = 0;
	while (!(vco_cal & FC11_VCOCAL_OK) && vco_retries < 3) {
	/* Reset the tuner and try again */
	err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
	FC0011_FE_CALLBACK_RESET, priv->addr);
	if (err) {
	dev_err(&priv->i2c->dev, "Failed to reset tuner\n");
	return err;
	}
	/* Reinit tuner config */
	err = 0;
	for (i = FC11_REG_FA; i <= FC11_REG_VCOSEL; i++)
	err \|= fc0011_writereg(priv, i, regs[i]);
	err \|= fc0011_writereg(priv, FC11_REG_7, regs[FC11_REG_7]);
	err \|= fc0011_writereg(priv, FC11_REG_8, regs[FC11_REG_8]);
	err \|= fc0011_writereg(priv, FC11_REG_10, regs[FC11_REG_10]);
	err \|= fc0011_writereg(priv, FC11_REG_11, regs[FC11_REG_11]);
	err \|= fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);
	if (err)
	return -EIO;
	/* VCO calibration */
	err = fc0011_vcocal_trigger(priv);
	if (err)
	return err;
	err = fc0011_vcocal_read(priv, &vco_cal);
	if (err)
	return err;
	vco_retries++;
	}
	if (!(vco_cal & FC11_VCOCAL_OK)) {
	dev_err(&priv->i2c->dev,
	"Failed to read VCO calibration value (got %02X)\n",
	(unsigned int)vco_cal);
	return -EIO;
	}
	vco_cal &= FC11_VCOCAL_VALUEMASK;

	switch (vco_sel) {
	default:
	WARN_ON(1);
	case 0:
	if (vco_cal < 8) {
	regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 \| FC11_VCOSEL_2);
	regs[FC11_REG_VCOSEL] \|= FC11_VCOSEL_1;
	err = fc0011_writereg(priv, FC11_REG_VCOSEL,
	regs[FC11_REG_VCOSEL]);
	if (err)
	return err;
	err = fc0011_vcocal_trigger(priv);
	if (err)
	return err;
	} else {
	regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 \| FC11_VCOSEL_2);
	err = fc0011_writereg(priv, FC11_REG_VCOSEL,
	regs[FC11_REG_VCOSEL]);
	if (err)
	return err;
	}
	break;
	case 1:
	if (vco_cal < 5) {
	regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 \| FC11_VCOSEL_2);
	regs[FC11_REG_VCOSEL] \|= FC11_VCOSEL_2;
	err = fc0011_writereg(priv, FC11_REG_VCOSEL,
	regs[FC11_REG_VCOSEL]);
	if (err)
	return err;
	err = fc0011_vcocal_trigger(priv);
	if (err)
	return err;
	} else if (vco_cal <= 48) {
	regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 \| FC11_VCOSEL_2);
	regs[FC11_REG_VCOSEL] \|= FC11_VCOSEL_1;
	err = fc0011_writereg(priv, FC11_REG_VCOSEL,
	regs[FC11_REG_VCOSEL]);
	if (err)
	return err;
	} else {
	regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 \| FC11_VCOSEL_2);
	err = fc0011_writereg(priv, FC11_REG_VCOSEL,
	regs[FC11_REG_VCOSEL]);
	if (err)
	return err;
	err = fc0011_vcocal_trigger(priv);
	if (err)
	return err;
	}
	break;
	case 2:
	if (vco_cal > 53) {
	regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 \| FC11_VCOSEL_2);
	regs[FC11_REG_VCOSEL] \|= FC11_VCOSEL_1;
	err = fc0011_writereg(priv, FC11_REG_VCOSEL,
	regs[FC11_REG_VCOSEL]);
	if (err)
	return err;
	err = fc0011_vcocal_trigger(priv);
	if (err)
	return err;
	} else {
	regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 \| FC11_VCOSEL_2);
	regs[FC11_REG_VCOSEL] \|= FC11_VCOSEL_2;
	err = fc0011_writereg(priv, FC11_REG_VCOSEL,
	regs[FC11_REG_VCOSEL]);
	if (err)
	return err;
	}
	break;
	}
	err = fc0011_vcocal_read(priv, NULL);
	if (err)
	return err;
	usleep_range(10000, 50000);

	err = fc0011_readreg(priv, FC11_REG_RCCAL, &regs[FC11_REG_RCCAL]);
	if (err)
	return err;
	regs[FC11_REG_RCCAL] \|= FC11_RCCAL_FORCE;
	err = fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);
	if (err)
	return err;
	regs[FC11_REG_16] = 0xB;
	err = fc0011_writereg(priv, FC11_REG_16, regs[FC11_REG_16]);
	if (err)
	return err;

	dev_dbg(&priv->i2c->dev, "Tuned to "
	"fa=%02X fp=%02X xin=%02X%02X vco=%02X vcosel=%02X "
	"vcocal=%02X(%u) bw=%u\n",
	(unsigned int)regs[FC11_REG_FA],
	(unsigned int)regs[FC11_REG_FP],
	(unsigned int)regs[FC11_REG_XINHI],
	(unsigned int)regs[FC11_REG_XINLO],
	(unsigned int)regs[FC11_REG_VCO],
	(unsigned int)regs[FC11_REG_VCOSEL],
	(unsigned int)vco_cal, vco_retries,
	(unsigned int)bandwidth);

	priv->frequency = p->frequency;
	priv->bandwidth = p->bandwidth_hz;

	return 0;
	}

	static int fc0011_get_frequency(struct dvb_frontend fe, u32 frequency)
	{
	struct fc0011_priv *priv = fe->tuner_priv;

	*frequency = priv->frequency;

	return 0;
	}

	static int fc0011_get_if_frequency(struct dvb_frontend fe, u32 frequency)
	{
	*frequency = 0;

	return 0;
	}

	static int fc0011_get_bandwidth(struct dvb_frontend fe, u32 bandwidth)
	{
	struct fc0011_priv *priv = fe->tuner_priv;

	*bandwidth = priv->bandwidth;

	return 0;
	}

	static const struct dvb_tuner_ops fc0011_tuner_ops = {
	.info = {
	.name = "Fitipower FC0011",

	.frequency_min = 45000000,
	.frequency_max = 1000000000,
	},

	.release = fc0011_release,
	.init = fc0011_init,

	.set_params = fc0011_set_params,

	.get_frequency = fc0011_get_frequency,
	.get_if_frequency = fc0011_get_if_frequency,
	.get_bandwidth = fc0011_get_bandwidth,
	};

	struct dvb_frontend fc0011_attach(struct dvb_frontend fe,
	struct i2c_adapter *i2c,
	const struct fc0011_config *config)
	{
	struct fc0011_priv *priv;

	priv = kzalloc(sizeof(struct fc0011_priv), GFP_KERNEL);
	if (!priv)
	return NULL;

	priv->i2c = i2c;
	priv->addr = config->i2c_address;

	fe->tuner_priv = priv;
	fe->ops.tuner_ops = fc0011_tuner_ops;

	dev_info(&priv->i2c->dev, "Fitipower FC0011 tuner attached\n");

	return fe;
	}
	EXPORT_SYMBOL(fc0011_attach);

	MODULE_DESCRIPTION("Fitipower FC0011 silicon tuner driver");
	MODULE_AUTHOR("Michael Buesch <m@bues.ch>");
	MODULE_LICENSE("GPL");