linux-imx

/*

 * Fitipower 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.

 */

​

#include "fc0012.h"

#include "fc0012-priv.h"

​

static int fc0012_writereg(struct fc0012_priv *priv, u8 reg, u8 val)

{

    u8 buf[2] = {reg, val};

    struct i2c_msg msg = {

        .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2

    };

​

    if (i2c_transfer(priv->i2c, &msg, 1) != 1) {

        dev_err(&priv->i2c->dev,

            "%s: I2C write reg failed, reg: %02x, val: %02x\n",

            KBUILD_MODNAME, reg, val);

        return -EREMOTEIO;

    }

    return 0;

}

​

static int fc0012_readreg(struct fc0012_priv *priv, u8 reg, u8 *val)

{

    struct i2c_msg msg[2] = {

        { .addr = priv->cfg->i2c_address, .flags = 0,

            .buf = &reg, .len = 1 },

        { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD,

            .buf = val, .len = 1 },

    };

​

    if (i2c_transfer(priv->i2c, msg, 2) != 2) {

        dev_err(&priv->i2c->dev,

            "%s: I2C read reg failed, reg: %02x\n",

            KBUILD_MODNAME, reg);

        return -EREMOTEIO;

    }

    return 0;

}

​

static void fc0012_release(struct dvb_frontend *fe)

{

    kfree(fe->tuner_priv);

    fe->tuner_priv = NULL;

}

​

static int fc0012_init(struct dvb_frontend *fe)

{

    struct fc0012_priv *priv = fe->tuner_priv;

    int i, ret = 0;

    unsigned char reg[] = {

        0x00,   /* dummy reg. 0 */

        0x05,   /* reg. 0x01 */

        0x10,   /* reg. 0x02 */

        0x00,   /* reg. 0x03 */

        0x00,   /* reg. 0x04 */

        0x0f,   /* reg. 0x05: may also be 0x0a */

        0x00,   /* reg. 0x06: divider 2, VCO slow */

        0x00,   /* reg. 0x07: may also be 0x0f */

        0xff,   /* reg. 0x08: AGC Clock divide by 256, AGC gain 1/256,

               Loop Bw 1/8 */

        0x6e,   /* reg. 0x09: Disable LoopThrough, Enable LoopThrough: 0x6f */

        0xb8,   /* reg. 0x0a: Disable LO Test Buffer */

        0x82,   /* reg. 0x0b: Output Clock is same as clock frequency,

               may also be 0x83 */

        0xfc,   /* reg. 0x0c: depending on AGC Up-Down mode, may need 0xf8 */

        0x02,   /* reg. 0x0d: AGC Not Forcing & LNA Forcing, 0x02 for DVB-T */

        0x00,   /* reg. 0x0e */

        0x00,   /* reg. 0x0f */

        0x00,   /* reg. 0x10: may also be 0x0d */

        0x00,   /* reg. 0x11 */

        0x1f,   /* reg. 0x12: Set to maximum gain */

        0x08,   /* reg. 0x13: Set to Middle Gain: 0x08,

               Low Gain: 0x00, High Gain: 0x10, enable IX2: 0x80 */

        0x00,   /* reg. 0x14 */

        0x04,   /* reg. 0x15: Enable LNA COMPS */

    };

​

    switch (priv->cfg->xtal_freq) {