628 lines
		
	
	
		
			14 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			628 lines
		
	
	
		
			14 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| /*
 | |
|  * Fitipower FC0013 tuner driver
 | |
|  *
 | |
|  * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net>
 | |
|  * partially based on driver code from Fitipower
 | |
|  * Copyright (C) 2010 Fitipower Integrated Technology Inc
 | |
|  *
 | |
|  *    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 "fc0013.h"
 | |
| #include "fc0013-priv.h"
 | |
| 
 | |
| static int fc0013_writereg(struct fc0013_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) {
 | |
| 		err("I2C write reg failed, reg: %02x, val: %02x", reg, val);
 | |
| 		return -EREMOTEIO;
 | |
| 	}
 | |
| 	return 0;
 | |
| }
 | |
| 
 | |
| static int fc0013_readreg(struct fc0013_priv *priv, u8 reg, u8 *val)
 | |
| {
 | |
| 	struct i2c_msg msg[2] = {
 | |
| 		{ .addr = priv->addr, .flags = 0, .buf = ®, .len = 1 },
 | |
| 		{ .addr = priv->addr, .flags = I2C_M_RD, .buf = val, .len = 1 },
 | |
| 	};
 | |
| 
 | |
| 	if (i2c_transfer(priv->i2c, msg, 2) != 2) {
 | |
| 		err("I2C read reg failed, reg: %02x", reg);
 | |
| 		return -EREMOTEIO;
 | |
| 	}
 | |
| 	return 0;
 | |
| }
 | |
| 
 | |
| static void fc0013_release(struct dvb_frontend *fe)
 | |
| {
 | |
| 	kfree(fe->tuner_priv);
 | |
| 	fe->tuner_priv = NULL;
 | |
| }
 | |
| 
 | |
| static int fc0013_init(struct dvb_frontend *fe)
 | |
| {
 | |
| 	struct fc0013_priv *priv = fe->tuner_priv;
 | |
| 	int i, ret = 0;
 | |
| 	unsigned char reg[] = {
 | |
| 		0x00,	/* reg. 0x00: dummy */
 | |
| 		0x09,	/* reg. 0x01 */
 | |
| 		0x16,	/* reg. 0x02 */
 | |
| 		0x00,	/* reg. 0x03 */
 | |
| 		0x00,	/* reg. 0x04 */
 | |
| 		0x17,	/* reg. 0x05 */
 | |
| 		0x02,	/* reg. 0x06 */
 | |
| 		0x0a,	/* reg. 0x07: CHECK */
 | |
| 		0xff,	/* reg. 0x08: AGC Clock divide by 256, AGC gain 1/256,
 | |
| 			   Loop Bw 1/8 */
 | |
| 		0x6f,	/* reg. 0x09: enable LoopThrough */
 | |
| 		0xb8,	/* reg. 0x0a: Disable LO Test Buffer */
 | |
| 		0x82,	/* reg. 0x0b: CHECK */
 | |
| 		0xfc,	/* reg. 0x0c: depending on AGC Up-Down mode, may need 0xf8 */
 | |
| 		0x01,	/* reg. 0x0d: AGC Not Forcing & LNA Forcing, may need 0x02 */
 | |
| 		0x00,	/* reg. 0x0e */
 | |
| 		0x00,	/* reg. 0x0f */
 | |
| 		0x00,	/* reg. 0x10 */
 | |
| 		0x00,	/* reg. 0x11 */
 | |
| 		0x00,	/* reg. 0x12 */
 | |
| 		0x00,	/* reg. 0x13 */
 | |
| 		0x50,	/* reg. 0x14: DVB-t High Gain, UHF.
 | |
| 			   Middle Gain: 0x48, Low Gain: 0x40 */
 | |
| 		0x01,	/* reg. 0x15 */
 | |
| 	};
 | |
| 
 | |
| 	switch (priv->xtal_freq) {
 | |
| 	case FC_XTAL_27_MHZ:
 | |
| 	case FC_XTAL_28_8_MHZ:
 | |
| 		reg[0x07] |= 0x20;
 | |
| 		break;
 | |
| 	case FC_XTAL_36_MHZ:
 | |
| 	default:
 | |
| 		break;
 | |
| 	}
 | |
| 
 | |
| 	if (priv->dual_master)
 | |
| 		reg[0x0c] |= 0x02;
 | |
| 
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
 | |
| 
 | |
| 	for (i = 1; i < sizeof(reg); i++) {
 | |
| 		ret = fc0013_writereg(priv, i, reg[i]);
 | |
| 		if (ret)
 | |
| 			break;
 | |
| 	}
 | |
| 
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
 | |
| 
 | |
| 	if (ret)
 | |
| 		err("fc0013_writereg failed: %d", ret);
 | |
| 
 | |
| 	return ret;
 | |
| }
 | |
| 
 | |
| static int fc0013_sleep(struct dvb_frontend *fe)
 | |
| {
 | |
| 	/* nothing to do here */
 | |
| 	return 0;
 | |
| }
 | |
| 
 | |
| int fc0013_rc_cal_add(struct dvb_frontend *fe, int rc_val)
 | |
| {
 | |
| 	struct fc0013_priv *priv = fe->tuner_priv;
 | |
| 	int ret;
 | |
| 	u8 rc_cal;
 | |
| 	int val;
 | |
| 
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
 | |
| 
 | |
| 	/* push rc_cal value, get rc_cal value */
 | |
| 	ret = fc0013_writereg(priv, 0x10, 0x00);
 | |
| 	if (ret)
 | |
| 		goto error_out;
 | |
| 
 | |
| 	/* get rc_cal value */
 | |
| 	ret = fc0013_readreg(priv, 0x10, &rc_cal);
 | |
| 	if (ret)
 | |
| 		goto error_out;
 | |
| 
 | |
| 	rc_cal &= 0x0f;
 | |
| 
 | |
| 	val = (int)rc_cal + rc_val;
 | |
| 
 | |
| 	/* forcing rc_cal */
 | |
| 	ret = fc0013_writereg(priv, 0x0d, 0x11);
 | |
| 	if (ret)
 | |
| 		goto error_out;
 | |
| 
 | |
| 	/* modify rc_cal value */
 | |
| 	if (val > 15)
 | |
| 		ret = fc0013_writereg(priv, 0x10, 0x0f);
 | |
| 	else if (val < 0)
 | |
| 		ret = fc0013_writereg(priv, 0x10, 0x00);
 | |
| 	else
 | |
| 		ret = fc0013_writereg(priv, 0x10, (u8)val);
 | |
| 
 | |
| error_out:
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
 | |
| 
 | |
| 	return ret;
 | |
| }
 | |
| EXPORT_SYMBOL(fc0013_rc_cal_add);
 | |
| 
 | |
| int fc0013_rc_cal_reset(struct dvb_frontend *fe)
 | |
| {
 | |
| 	struct fc0013_priv *priv = fe->tuner_priv;
 | |
| 	int ret;
 | |
| 
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
 | |
| 
 | |
| 	ret = fc0013_writereg(priv, 0x0d, 0x01);
 | |
| 	if (!ret)
 | |
| 		ret = fc0013_writereg(priv, 0x10, 0x00);
 | |
| 
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
 | |
| 
 | |
| 	return ret;
 | |
| }
 | |
| EXPORT_SYMBOL(fc0013_rc_cal_reset);
 | |
| 
 | |
| static int fc0013_set_vhf_track(struct fc0013_priv *priv, u32 freq)
 | |
| {
 | |
| 	int ret;
 | |
| 	u8 tmp;
 | |
| 
 | |
| 	ret = fc0013_readreg(priv, 0x1d, &tmp);
 | |
| 	if (ret)
 | |
| 		goto error_out;
 | |
| 	tmp &= 0xe3;
 | |
| 	if (freq <= 177500) {		/* VHF Track: 7 */
 | |
| 		ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c);
 | |
| 	} else if (freq <= 184500) {	/* VHF Track: 6 */
 | |
| 		ret = fc0013_writereg(priv, 0x1d, tmp | 0x18);
 | |
| 	} else if (freq <= 191500) {	/* VHF Track: 5 */
 | |
| 		ret = fc0013_writereg(priv, 0x1d, tmp | 0x14);
 | |
| 	} else if (freq <= 198500) {	/* VHF Track: 4 */
 | |
| 		ret = fc0013_writereg(priv, 0x1d, tmp | 0x10);
 | |
| 	} else if (freq <= 205500) {	/* VHF Track: 3 */
 | |
| 		ret = fc0013_writereg(priv, 0x1d, tmp | 0x0c);
 | |
| 	} else if (freq <= 219500) {	/* VHF Track: 2 */
 | |
| 		ret = fc0013_writereg(priv, 0x1d, tmp | 0x08);
 | |
| 	} else if (freq < 300000) {	/* VHF Track: 1 */
 | |
| 		ret = fc0013_writereg(priv, 0x1d, tmp | 0x04);
 | |
| 	} else {			/* UHF and GPS */
 | |
| 		ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c);
 | |
| 	}
 | |
| error_out:
 | |
| 	return ret;
 | |
| }
 | |
| 
 | |
| static int fc0013_set_params(struct dvb_frontend *fe)
 | |
| {
 | |
| 	struct fc0013_priv *priv = fe->tuner_priv;
 | |
| 	int i, ret = 0;
 | |
| 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 | |
| 	u32 freq = p->frequency / 1000;
 | |
| 	u32 delsys = p->delivery_system;
 | |
| 	unsigned char reg[7], am, pm, multi, tmp;
 | |
| 	unsigned long f_vco;
 | |
| 	unsigned short xtal_freq_khz_2, xin, xdiv;
 | |
| 	bool vco_select = false;
 | |
| 
 | |
| 	if (fe->callback) {
 | |
| 		ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 | |
| 			FC_FE_CALLBACK_VHF_ENABLE, (freq > 300000 ? 0 : 1));
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 	}
 | |
| 
 | |
| 	switch (priv->xtal_freq) {
 | |
| 	case FC_XTAL_27_MHZ:
 | |
| 		xtal_freq_khz_2 = 27000 / 2;
 | |
| 		break;
 | |
| 	case FC_XTAL_36_MHZ:
 | |
| 		xtal_freq_khz_2 = 36000 / 2;
 | |
| 		break;
 | |
| 	case FC_XTAL_28_8_MHZ:
 | |
| 	default:
 | |
| 		xtal_freq_khz_2 = 28800 / 2;
 | |
| 		break;
 | |
| 	}
 | |
| 
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
 | |
| 
 | |
| 	/* set VHF track */
 | |
| 	ret = fc0013_set_vhf_track(priv, freq);
 | |
| 	if (ret)
 | |
| 		goto exit;
 | |
| 
 | |
| 	if (freq < 300000) {
 | |
| 		/* enable VHF filter */
 | |
| 		ret = fc0013_readreg(priv, 0x07, &tmp);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 		ret = fc0013_writereg(priv, 0x07, tmp | 0x10);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 
 | |
| 		/* disable UHF & disable GPS */
 | |
| 		ret = fc0013_readreg(priv, 0x14, &tmp);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 		ret = fc0013_writereg(priv, 0x14, tmp & 0x1f);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 	} else if (freq <= 862000) {
 | |
| 		/* disable VHF filter */
 | |
| 		ret = fc0013_readreg(priv, 0x07, &tmp);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 		ret = fc0013_writereg(priv, 0x07, tmp & 0xef);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 
 | |
| 		/* enable UHF & disable GPS */
 | |
| 		ret = fc0013_readreg(priv, 0x14, &tmp);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 		ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x40);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 	} else {
 | |
| 		/* disable VHF filter */
 | |
| 		ret = fc0013_readreg(priv, 0x07, &tmp);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 		ret = fc0013_writereg(priv, 0x07, tmp & 0xef);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 
 | |
| 		/* disable UHF & enable GPS */
 | |
| 		ret = fc0013_readreg(priv, 0x14, &tmp);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 		ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x20);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 	}
 | |
| 
 | |
| 	/* select frequency divider and the frequency of VCO */
 | |
| 	if (freq < 37084) {		/* freq * 96 < 3560000 */
 | |
| 		multi = 96;
 | |
| 		reg[5] = 0x82;
 | |
| 		reg[6] = 0x00;
 | |
| 	} else if (freq < 55625) {	/* freq * 64 < 3560000 */
 | |
| 		multi = 64;
 | |
| 		reg[5] = 0x02;
 | |
| 		reg[6] = 0x02;
 | |
| 	} else if (freq < 74167) {	/* freq * 48 < 3560000 */
 | |
| 		multi = 48;
 | |
| 		reg[5] = 0x42;
 | |
| 		reg[6] = 0x00;
 | |
| 	} else if (freq < 111250) {	/* freq * 32 < 3560000 */
 | |
| 		multi = 32;
 | |
| 		reg[5] = 0x82;
 | |
| 		reg[6] = 0x02;
 | |
| 	} else if (freq < 148334) {	/* freq * 24 < 3560000 */
 | |
| 		multi = 24;
 | |
| 		reg[5] = 0x22;
 | |
| 		reg[6] = 0x00;
 | |
| 	} else if (freq < 222500) {	/* freq * 16 < 3560000 */
 | |
| 		multi = 16;
 | |
| 		reg[5] = 0x42;
 | |
| 		reg[6] = 0x02;
 | |
| 	} else if (freq < 296667) {	/* freq * 12 < 3560000 */
 | |
| 		multi = 12;
 | |
| 		reg[5] = 0x12;
 | |
| 		reg[6] = 0x00;
 | |
| 	} else if (freq < 445000) {	/* freq * 8 < 3560000 */
 | |
| 		multi = 8;
 | |
| 		reg[5] = 0x22;
 | |
| 		reg[6] = 0x02;
 | |
| 	} else if (freq < 593334) {	/* freq * 6 < 3560000 */
 | |
| 		multi = 6;
 | |
| 		reg[5] = 0x0a;
 | |
| 		reg[6] = 0x00;
 | |
| 	} else if (freq < 950000) {	/* freq * 4 < 3800000 */
 | |
| 		multi = 4;
 | |
| 		reg[5] = 0x12;
 | |
| 		reg[6] = 0x02;
 | |
| 	} else {
 | |
| 		multi = 2;
 | |
| 		reg[5] = 0x0a;
 | |
| 		reg[6] = 0x02;
 | |
| 	}
 | |
| 
 | |
| 	f_vco = freq * multi;
 | |
| 
 | |
| 	if (f_vco >= 3060000) {
 | |
| 		reg[6] |= 0x08;
 | |
| 		vco_select = true;
 | |
| 	}
 | |
| 
 | |
| 	if (freq >= 45000) {
 | |
| 		/* From divided value (XDIV) determined the FA and FP value */
 | |
| 		xdiv = (unsigned short)(f_vco / xtal_freq_khz_2);
 | |
| 		if ((f_vco - xdiv * xtal_freq_khz_2) >= (xtal_freq_khz_2 / 2))
 | |
| 			xdiv++;
 | |
| 
 | |
| 		pm = (unsigned char)(xdiv / 8);
 | |
| 		am = (unsigned char)(xdiv - (8 * pm));
 | |
| 
 | |
| 		if (am < 2) {
 | |
| 			reg[1] = am + 8;
 | |
| 			reg[2] = pm - 1;
 | |
| 		} else {
 | |
| 			reg[1] = am;
 | |
| 			reg[2] = pm;
 | |
| 		}
 | |
| 	} else {
 | |
| 		/* fix for frequency less than 45 MHz */
 | |
| 		reg[1] = 0x06;
 | |
| 		reg[2] = 0x11;
 | |
| 	}
 | |
| 
 | |
| 	/* fix clock out */
 | |
| 	reg[6] |= 0x20;
 | |
| 
 | |
| 	/* From VCO frequency determines the XIN ( fractional part of Delta
 | |
| 	   Sigma PLL) and divided value (XDIV) */
 | |
| 	xin = (unsigned short)(f_vco - (f_vco / xtal_freq_khz_2) * xtal_freq_khz_2);
 | |
| 	xin = (xin << 15) / xtal_freq_khz_2;
 | |
| 	if (xin >= 16384)
 | |
| 		xin += 32768;
 | |
| 
 | |
| 	reg[3] = xin >> 8;
 | |
| 	reg[4] = xin & 0xff;
 | |
| 
 | |
| 	if (delsys == SYS_DVBT) {
 | |
| 		reg[6] &= 0x3f; /* bits 6 and 7 describe the bandwidth */
 | |
| 		switch (p->bandwidth_hz) {
 | |
| 		case 6000000:
 | |
| 			reg[6] |= 0x80;
 | |
| 			break;
 | |
| 		case 7000000:
 | |
| 			reg[6] |= 0x40;
 | |
| 			break;
 | |
| 		case 8000000:
 | |
| 		default:
 | |
| 			break;
 | |
| 		}
 | |
| 	} else {
 | |
| 		err("%s: modulation type not supported!", __func__);
 | |
| 		return -EINVAL;
 | |
| 	}
 | |
| 
 | |
| 	/* modified for Realtek demod */
 | |
| 	reg[5] |= 0x07;
 | |
| 
 | |
| 	for (i = 1; i <= 6; i++) {
 | |
| 		ret = fc0013_writereg(priv, i, reg[i]);
 | |
| 		if (ret)
 | |
| 			goto exit;
 | |
| 	}
 | |
| 
 | |
| 	ret = fc0013_readreg(priv, 0x11, &tmp);
 | |
| 	if (ret)
 | |
| 		goto exit;
 | |
| 	if (multi == 64)
 | |
| 		ret = fc0013_writereg(priv, 0x11, tmp | 0x04);
 | |
| 	else
 | |
| 		ret = fc0013_writereg(priv, 0x11, tmp & 0xfb);
 | |
| 	if (ret)
 | |
| 		goto exit;
 | |
| 
 | |
| 	/* VCO Calibration */
 | |
| 	ret = fc0013_writereg(priv, 0x0e, 0x80);
 | |
| 	if (!ret)
 | |
| 		ret = fc0013_writereg(priv, 0x0e, 0x00);
 | |
| 
 | |
| 	/* VCO Re-Calibration if needed */
 | |
| 	if (!ret)
 | |
| 		ret = fc0013_writereg(priv, 0x0e, 0x00);
 | |
| 
 | |
| 	if (!ret) {
 | |
| 		msleep(10);
 | |
| 		ret = fc0013_readreg(priv, 0x0e, &tmp);
 | |
| 	}
 | |
| 	if (ret)
 | |
| 		goto exit;
 | |
| 
 | |
| 	/* vco selection */
 | |
| 	tmp &= 0x3f;
 | |
| 
 | |
| 	if (vco_select) {
 | |
| 		if (tmp > 0x3c) {
 | |
| 			reg[6] &= ~0x08;
 | |
| 			ret = fc0013_writereg(priv, 0x06, reg[6]);
 | |
| 			if (!ret)
 | |
| 				ret = fc0013_writereg(priv, 0x0e, 0x80);
 | |
| 			if (!ret)
 | |
| 				ret = fc0013_writereg(priv, 0x0e, 0x00);
 | |
| 		}
 | |
| 	} else {
 | |
| 		if (tmp < 0x02) {
 | |
| 			reg[6] |= 0x08;
 | |
| 			ret = fc0013_writereg(priv, 0x06, reg[6]);
 | |
| 			if (!ret)
 | |
| 				ret = fc0013_writereg(priv, 0x0e, 0x80);
 | |
| 			if (!ret)
 | |
| 				ret = fc0013_writereg(priv, 0x0e, 0x00);
 | |
| 		}
 | |
| 	}
 | |
| 
 | |
| 	priv->frequency = p->frequency;
 | |
| 	priv->bandwidth = p->bandwidth_hz;
 | |
| 
 | |
| exit:
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
 | |
| 	if (ret)
 | |
| 		warn("%s: failed: %d", __func__, ret);
 | |
| 	return ret;
 | |
| }
 | |
| 
 | |
| static int fc0013_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 | |
| {
 | |
| 	struct fc0013_priv *priv = fe->tuner_priv;
 | |
| 	*frequency = priv->frequency;
 | |
| 	return 0;
 | |
| }
 | |
| 
 | |
| static int fc0013_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 | |
| {
 | |
| 	/* always ? */
 | |
| 	*frequency = 0;
 | |
| 	return 0;
 | |
| }
 | |
| 
 | |
| static int fc0013_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
 | |
| {
 | |
| 	struct fc0013_priv *priv = fe->tuner_priv;
 | |
| 	*bandwidth = priv->bandwidth;
 | |
| 	return 0;
 | |
| }
 | |
| 
 | |
| #define INPUT_ADC_LEVEL	-8
 | |
| 
 | |
| static int fc0013_get_rf_strength(struct dvb_frontend *fe, u16 *strength)
 | |
| {
 | |
| 	struct fc0013_priv *priv = fe->tuner_priv;
 | |
| 	int ret;
 | |
| 	unsigned char tmp;
 | |
| 	int int_temp, lna_gain, int_lna, tot_agc_gain, power;
 | |
| 	static const int fc0013_lna_gain_table[] = {
 | |
| 		/* low gain */
 | |
| 		-63, -58, -99, -73,
 | |
| 		-63, -65, -54, -60,
 | |
| 		/* middle gain */
 | |
| 		 71,  70,  68,  67,
 | |
| 		 65,  63,  61,  58,
 | |
| 		/* high gain */
 | |
| 		197, 191, 188, 186,
 | |
| 		184, 182, 181, 179,
 | |
| 	};
 | |
| 
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
 | |
| 
 | |
| 	ret = fc0013_writereg(priv, 0x13, 0x00);
 | |
| 	if (ret)
 | |
| 		goto err;
 | |
| 
 | |
| 	ret = fc0013_readreg(priv, 0x13, &tmp);
 | |
| 	if (ret)
 | |
| 		goto err;
 | |
| 	int_temp = tmp;
 | |
| 
 | |
| 	ret = fc0013_readreg(priv, 0x14, &tmp);
 | |
| 	if (ret)
 | |
| 		goto err;
 | |
| 	lna_gain = tmp & 0x1f;
 | |
| 
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
 | |
| 
 | |
| 	if (lna_gain < ARRAY_SIZE(fc0013_lna_gain_table)) {
 | |
| 		int_lna = fc0013_lna_gain_table[lna_gain];
 | |
| 		tot_agc_gain = (abs((int_temp >> 5) - 7) - 2 +
 | |
| 				(int_temp & 0x1f)) * 2;
 | |
| 		power = INPUT_ADC_LEVEL - tot_agc_gain - int_lna / 10;
 | |
| 
 | |
| 		if (power >= 45)
 | |
| 			*strength = 255;	/* 100% */
 | |
| 		else if (power < -95)
 | |
| 			*strength = 0;
 | |
| 		else
 | |
| 			*strength = (power + 95) * 255 / 140;
 | |
| 
 | |
| 		*strength |= *strength << 8;
 | |
| 	} else {
 | |
| 		ret = -1;
 | |
| 	}
 | |
| 
 | |
| 	goto exit;
 | |
| 
 | |
| err:
 | |
| 	if (fe->ops.i2c_gate_ctrl)
 | |
| 		fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
 | |
| exit:
 | |
| 	if (ret)
 | |
| 		warn("%s: failed: %d", __func__, ret);
 | |
| 	return ret;
 | |
| }
 | |
| 
 | |
| static const struct dvb_tuner_ops fc0013_tuner_ops = {
 | |
| 	.info = {
 | |
| 		.name		= "Fitipower FC0013",
 | |
| 
 | |
| 		.frequency_min	= 37000000,	/* estimate */
 | |
| 		.frequency_max	= 1680000000,	/* CHECK */
 | |
| 		.frequency_step	= 0,
 | |
| 	},
 | |
| 
 | |
| 	.release	= fc0013_release,
 | |
| 
 | |
| 	.init		= fc0013_init,
 | |
| 	.sleep		= fc0013_sleep,
 | |
| 
 | |
| 	.set_params	= fc0013_set_params,
 | |
| 
 | |
| 	.get_frequency	= fc0013_get_frequency,
 | |
| 	.get_if_frequency = fc0013_get_if_frequency,
 | |
| 	.get_bandwidth	= fc0013_get_bandwidth,
 | |
| 
 | |
| 	.get_rf_strength = fc0013_get_rf_strength,
 | |
| };
 | |
| 
 | |
| struct dvb_frontend *fc0013_attach(struct dvb_frontend *fe,
 | |
| 	struct i2c_adapter *i2c, u8 i2c_address, int dual_master,
 | |
| 	enum fc001x_xtal_freq xtal_freq)
 | |
| {
 | |
| 	struct fc0013_priv *priv = NULL;
 | |
| 
 | |
| 	priv = kzalloc(sizeof(struct fc0013_priv), GFP_KERNEL);
 | |
| 	if (priv == NULL)
 | |
| 		return NULL;
 | |
| 
 | |
| 	priv->i2c = i2c;
 | |
| 	priv->dual_master = dual_master;
 | |
| 	priv->addr = i2c_address;
 | |
| 	priv->xtal_freq = xtal_freq;
 | |
| 
 | |
| 	info("Fitipower FC0013 successfully attached.");
 | |
| 
 | |
| 	fe->tuner_priv = priv;
 | |
| 
 | |
| 	memcpy(&fe->ops.tuner_ops, &fc0013_tuner_ops,
 | |
| 		sizeof(struct dvb_tuner_ops));
 | |
| 
 | |
| 	return fe;
 | |
| }
 | |
| EXPORT_SYMBOL(fc0013_attach);
 | |
| 
 | |
| MODULE_DESCRIPTION("Fitipower FC0013 silicon tuner driver");
 | |
| MODULE_AUTHOR("Hans-Frieder Vogt <hfvogt@gmx.net>");
 | |
| MODULE_LICENSE("GPL");
 | |
| MODULE_VERSION("0.2");
 |