628 lines
14 KiB
C
628 lines
14 KiB
C
/*
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* Fitipower FC0013 tuner driver
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*
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* Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net>
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* partially based on driver code from Fitipower
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* Copyright (C) 2010 Fitipower Integrated Technology Inc
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include "fc0013.h"
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#include "fc0013-priv.h"
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static int fc0013_writereg(struct fc0013_priv *priv, u8 reg, u8 val)
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{
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u8 buf[2] = {reg, val};
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struct i2c_msg msg = {
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.addr = priv->addr, .flags = 0, .buf = buf, .len = 2
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};
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if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
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err("I2C write reg failed, reg: %02x, val: %02x", reg, val);
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return -EREMOTEIO;
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}
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return 0;
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}
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static int fc0013_readreg(struct fc0013_priv *priv, u8 reg, u8 *val)
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{
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struct i2c_msg msg[2] = {
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{ .addr = priv->addr, .flags = 0, .buf = ®, .len = 1 },
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{ .addr = priv->addr, .flags = I2C_M_RD, .buf = val, .len = 1 },
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};
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if (i2c_transfer(priv->i2c, msg, 2) != 2) {
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err("I2C read reg failed, reg: %02x", reg);
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return -EREMOTEIO;
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}
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return 0;
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}
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static void fc0013_release(struct dvb_frontend *fe)
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{
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kfree(fe->tuner_priv);
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fe->tuner_priv = NULL;
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}
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static int fc0013_init(struct dvb_frontend *fe)
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{
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struct fc0013_priv *priv = fe->tuner_priv;
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int i, ret = 0;
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unsigned char reg[] = {
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0x00, /* reg. 0x00: dummy */
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0x09, /* reg. 0x01 */
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0x16, /* reg. 0x02 */
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0x00, /* reg. 0x03 */
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0x00, /* reg. 0x04 */
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0x17, /* reg. 0x05 */
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0x02, /* reg. 0x06 */
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0x0a, /* reg. 0x07: CHECK */
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0xff, /* reg. 0x08: AGC Clock divide by 256, AGC gain 1/256,
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Loop Bw 1/8 */
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0x6f, /* reg. 0x09: enable LoopThrough */
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0xb8, /* reg. 0x0a: Disable LO Test Buffer */
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0x82, /* reg. 0x0b: CHECK */
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0xfc, /* reg. 0x0c: depending on AGC Up-Down mode, may need 0xf8 */
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0x01, /* reg. 0x0d: AGC Not Forcing & LNA Forcing, may need 0x02 */
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0x00, /* reg. 0x0e */
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0x00, /* reg. 0x0f */
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0x00, /* reg. 0x10 */
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0x00, /* reg. 0x11 */
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0x00, /* reg. 0x12 */
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0x00, /* reg. 0x13 */
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0x50, /* reg. 0x14: DVB-t High Gain, UHF.
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Middle Gain: 0x48, Low Gain: 0x40 */
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0x01, /* reg. 0x15 */
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};
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switch (priv->xtal_freq) {
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case FC_XTAL_27_MHZ:
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case FC_XTAL_28_8_MHZ:
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reg[0x07] |= 0x20;
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break;
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case FC_XTAL_36_MHZ:
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default:
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break;
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}
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if (priv->dual_master)
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reg[0x0c] |= 0x02;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
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for (i = 1; i < sizeof(reg); i++) {
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ret = fc0013_writereg(priv, i, reg[i]);
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if (ret)
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break;
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}
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
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if (ret)
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err("fc0013_writereg failed: %d", ret);
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return ret;
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}
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static int fc0013_sleep(struct dvb_frontend *fe)
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{
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/* nothing to do here */
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return 0;
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}
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int fc0013_rc_cal_add(struct dvb_frontend *fe, int rc_val)
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{
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struct fc0013_priv *priv = fe->tuner_priv;
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int ret;
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u8 rc_cal;
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int val;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
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/* push rc_cal value, get rc_cal value */
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ret = fc0013_writereg(priv, 0x10, 0x00);
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if (ret)
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goto error_out;
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/* get rc_cal value */
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ret = fc0013_readreg(priv, 0x10, &rc_cal);
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if (ret)
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goto error_out;
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rc_cal &= 0x0f;
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val = (int)rc_cal + rc_val;
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/* forcing rc_cal */
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ret = fc0013_writereg(priv, 0x0d, 0x11);
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if (ret)
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goto error_out;
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/* modify rc_cal value */
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if (val > 15)
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ret = fc0013_writereg(priv, 0x10, 0x0f);
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else if (val < 0)
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ret = fc0013_writereg(priv, 0x10, 0x00);
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else
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ret = fc0013_writereg(priv, 0x10, (u8)val);
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error_out:
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
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return ret;
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}
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EXPORT_SYMBOL(fc0013_rc_cal_add);
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int fc0013_rc_cal_reset(struct dvb_frontend *fe)
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{
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struct fc0013_priv *priv = fe->tuner_priv;
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int ret;
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
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ret = fc0013_writereg(priv, 0x0d, 0x01);
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if (!ret)
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ret = fc0013_writereg(priv, 0x10, 0x00);
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
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return ret;
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}
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EXPORT_SYMBOL(fc0013_rc_cal_reset);
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static int fc0013_set_vhf_track(struct fc0013_priv *priv, u32 freq)
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{
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int ret;
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u8 tmp;
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ret = fc0013_readreg(priv, 0x1d, &tmp);
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if (ret)
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goto error_out;
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tmp &= 0xe3;
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if (freq <= 177500) { /* VHF Track: 7 */
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ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c);
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} else if (freq <= 184500) { /* VHF Track: 6 */
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ret = fc0013_writereg(priv, 0x1d, tmp | 0x18);
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} else if (freq <= 191500) { /* VHF Track: 5 */
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ret = fc0013_writereg(priv, 0x1d, tmp | 0x14);
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} else if (freq <= 198500) { /* VHF Track: 4 */
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ret = fc0013_writereg(priv, 0x1d, tmp | 0x10);
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} else if (freq <= 205500) { /* VHF Track: 3 */
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ret = fc0013_writereg(priv, 0x1d, tmp | 0x0c);
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} else if (freq <= 219500) { /* VHF Track: 2 */
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ret = fc0013_writereg(priv, 0x1d, tmp | 0x08);
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} else if (freq < 300000) { /* VHF Track: 1 */
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ret = fc0013_writereg(priv, 0x1d, tmp | 0x04);
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} else { /* UHF and GPS */
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ret = fc0013_writereg(priv, 0x1d, tmp | 0x1c);
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}
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error_out:
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return ret;
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}
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static int fc0013_set_params(struct dvb_frontend *fe)
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{
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struct fc0013_priv *priv = fe->tuner_priv;
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int i, ret = 0;
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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u32 freq = p->frequency / 1000;
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u32 delsys = p->delivery_system;
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unsigned char reg[7], am, pm, multi, tmp;
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unsigned long f_vco;
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unsigned short xtal_freq_khz_2, xin, xdiv;
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bool vco_select = false;
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if (fe->callback) {
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ret = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
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FC_FE_CALLBACK_VHF_ENABLE, (freq > 300000 ? 0 : 1));
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if (ret)
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goto exit;
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}
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switch (priv->xtal_freq) {
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case FC_XTAL_27_MHZ:
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xtal_freq_khz_2 = 27000 / 2;
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break;
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case FC_XTAL_36_MHZ:
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xtal_freq_khz_2 = 36000 / 2;
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break;
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case FC_XTAL_28_8_MHZ:
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default:
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xtal_freq_khz_2 = 28800 / 2;
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break;
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}
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
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/* set VHF track */
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ret = fc0013_set_vhf_track(priv, freq);
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if (ret)
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goto exit;
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if (freq < 300000) {
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/* enable VHF filter */
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ret = fc0013_readreg(priv, 0x07, &tmp);
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if (ret)
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goto exit;
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ret = fc0013_writereg(priv, 0x07, tmp | 0x10);
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if (ret)
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goto exit;
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/* disable UHF & disable GPS */
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ret = fc0013_readreg(priv, 0x14, &tmp);
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if (ret)
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goto exit;
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ret = fc0013_writereg(priv, 0x14, tmp & 0x1f);
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if (ret)
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goto exit;
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} else if (freq <= 862000) {
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/* disable VHF filter */
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ret = fc0013_readreg(priv, 0x07, &tmp);
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if (ret)
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goto exit;
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ret = fc0013_writereg(priv, 0x07, tmp & 0xef);
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if (ret)
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goto exit;
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/* enable UHF & disable GPS */
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ret = fc0013_readreg(priv, 0x14, &tmp);
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if (ret)
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goto exit;
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ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x40);
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if (ret)
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goto exit;
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} else {
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/* disable VHF filter */
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ret = fc0013_readreg(priv, 0x07, &tmp);
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if (ret)
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goto exit;
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ret = fc0013_writereg(priv, 0x07, tmp & 0xef);
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if (ret)
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goto exit;
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/* disable UHF & enable GPS */
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ret = fc0013_readreg(priv, 0x14, &tmp);
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if (ret)
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goto exit;
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ret = fc0013_writereg(priv, 0x14, (tmp & 0x1f) | 0x20);
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if (ret)
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goto exit;
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}
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/* select frequency divider and the frequency of VCO */
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if (freq < 37084) { /* freq * 96 < 3560000 */
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multi = 96;
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reg[5] = 0x82;
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reg[6] = 0x00;
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} else if (freq < 55625) { /* freq * 64 < 3560000 */
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multi = 64;
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reg[5] = 0x02;
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reg[6] = 0x02;
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} else if (freq < 74167) { /* freq * 48 < 3560000 */
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multi = 48;
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reg[5] = 0x42;
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reg[6] = 0x00;
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} else if (freq < 111250) { /* freq * 32 < 3560000 */
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multi = 32;
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reg[5] = 0x82;
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reg[6] = 0x02;
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} else if (freq < 148334) { /* freq * 24 < 3560000 */
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multi = 24;
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reg[5] = 0x22;
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reg[6] = 0x00;
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} else if (freq < 222500) { /* freq * 16 < 3560000 */
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multi = 16;
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reg[5] = 0x42;
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reg[6] = 0x02;
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} else if (freq < 296667) { /* freq * 12 < 3560000 */
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multi = 12;
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reg[5] = 0x12;
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reg[6] = 0x00;
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} else if (freq < 445000) { /* freq * 8 < 3560000 */
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multi = 8;
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reg[5] = 0x22;
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reg[6] = 0x02;
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} else if (freq < 593334) { /* freq * 6 < 3560000 */
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multi = 6;
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reg[5] = 0x0a;
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reg[6] = 0x00;
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} else if (freq < 950000) { /* freq * 4 < 3800000 */
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multi = 4;
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reg[5] = 0x12;
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reg[6] = 0x02;
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} else {
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multi = 2;
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reg[5] = 0x0a;
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reg[6] = 0x02;
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}
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f_vco = freq * multi;
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if (f_vco >= 3060000) {
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reg[6] |= 0x08;
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vco_select = true;
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}
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if (freq >= 45000) {
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/* From divided value (XDIV) determined the FA and FP value */
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xdiv = (unsigned short)(f_vco / xtal_freq_khz_2);
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if ((f_vco - xdiv * xtal_freq_khz_2) >= (xtal_freq_khz_2 / 2))
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xdiv++;
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pm = (unsigned char)(xdiv / 8);
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am = (unsigned char)(xdiv - (8 * pm));
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if (am < 2) {
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reg[1] = am + 8;
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reg[2] = pm - 1;
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} else {
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reg[1] = am;
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reg[2] = pm;
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}
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} else {
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/* fix for frequency less than 45 MHz */
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reg[1] = 0x06;
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reg[2] = 0x11;
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}
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/* fix clock out */
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reg[6] |= 0x20;
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/* From VCO frequency determines the XIN ( fractional part of Delta
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Sigma PLL) and divided value (XDIV) */
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xin = (unsigned short)(f_vco - (f_vco / xtal_freq_khz_2) * xtal_freq_khz_2);
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xin = (xin << 15) / xtal_freq_khz_2;
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if (xin >= 16384)
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xin += 32768;
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reg[3] = xin >> 8;
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reg[4] = xin & 0xff;
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if (delsys == SYS_DVBT) {
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reg[6] &= 0x3f; /* bits 6 and 7 describe the bandwidth */
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switch (p->bandwidth_hz) {
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case 6000000:
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reg[6] |= 0x80;
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break;
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case 7000000:
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reg[6] |= 0x40;
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break;
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case 8000000:
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default:
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break;
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}
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} else {
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err("%s: modulation type not supported!", __func__);
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return -EINVAL;
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}
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/* modified for Realtek demod */
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reg[5] |= 0x07;
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for (i = 1; i <= 6; i++) {
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ret = fc0013_writereg(priv, i, reg[i]);
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if (ret)
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goto exit;
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}
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ret = fc0013_readreg(priv, 0x11, &tmp);
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if (ret)
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goto exit;
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if (multi == 64)
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ret = fc0013_writereg(priv, 0x11, tmp | 0x04);
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else
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ret = fc0013_writereg(priv, 0x11, tmp & 0xfb);
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if (ret)
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goto exit;
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/* VCO Calibration */
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ret = fc0013_writereg(priv, 0x0e, 0x80);
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if (!ret)
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ret = fc0013_writereg(priv, 0x0e, 0x00);
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/* VCO Re-Calibration if needed */
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if (!ret)
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ret = fc0013_writereg(priv, 0x0e, 0x00);
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if (!ret) {
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msleep(10);
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ret = fc0013_readreg(priv, 0x0e, &tmp);
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}
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if (ret)
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goto exit;
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/* vco selection */
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tmp &= 0x3f;
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if (vco_select) {
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if (tmp > 0x3c) {
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reg[6] &= ~0x08;
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ret = fc0013_writereg(priv, 0x06, reg[6]);
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if (!ret)
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ret = fc0013_writereg(priv, 0x0e, 0x80);
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if (!ret)
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ret = fc0013_writereg(priv, 0x0e, 0x00);
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}
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} else {
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if (tmp < 0x02) {
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reg[6] |= 0x08;
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ret = fc0013_writereg(priv, 0x06, reg[6]);
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if (!ret)
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ret = fc0013_writereg(priv, 0x0e, 0x80);
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if (!ret)
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ret = fc0013_writereg(priv, 0x0e, 0x00);
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}
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}
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priv->frequency = p->frequency;
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priv->bandwidth = p->bandwidth_hz;
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exit:
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if (fe->ops.i2c_gate_ctrl)
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fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
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if (ret)
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warn("%s: failed: %d", __func__, ret);
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return ret;
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}
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static int fc0013_get_frequency(struct dvb_frontend *fe, u32 *frequency)
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{
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struct fc0013_priv *priv = fe->tuner_priv;
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*frequency = priv->frequency;
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return 0;
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}
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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");
|