drivers/media/dvb/frontends/tda827x.c - kernel/msm-4.9 - Gitiles

 /*
  *
  * (c) 2005 Hartmut Hackmann
  * (c) 2007 Michael Krufky
  *
  *  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 <linux/module.h>
 #include <linux/dvb/frontend.h>
 #include <asm/types.h>

 #include "tda827x.h"

 static int debug = 0;
 #define dprintk(args...) \
 	do {					    \
 		if (debug) printk(KERN_DEBUG "tda827x: " args); \
 	} while (0)

 struct tda827x_priv {
 	int i2c_addr;
 	struct i2c_adapter *i2c_adap;
 	struct tda827x_config *cfg;
 	u32 frequency;
 	u32 bandwidth;
 };

 struct tda827x_data {
 	u32 lomax;
 	u8  spd;
 	u8  bs;
 	u8  bp;
 	u8  cp;
 	u8  gc3;
 	u8 div1p5;
 };

 static const struct tda827x_data tda827x_dvbt[] = {
 	{ .lomax =  62000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
 	{ .lomax =  66000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
 	{ .lomax =  76000000, .spd = 3, .bs = 1, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
 	{ .lomax =  84000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
 	{ .lomax =  93000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax =  98000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 109000000, .spd = 3, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 123000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
 	{ .lomax = 133000000, .spd = 2, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
 	{ .lomax = 151000000, .spd = 2, .bs = 1, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 154000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 181000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 0, .div1p5 = 0},
 	{ .lomax = 185000000, .spd = 2, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 217000000, .spd = 2, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 244000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
 	{ .lomax = 265000000, .spd = 1, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
 	{ .lomax = 302000000, .spd = 1, .bs = 1, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 324000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 370000000, .spd = 1, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 454000000, .spd = 1, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 493000000, .spd = 0, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
 	{ .lomax = 530000000, .spd = 0, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
 	{ .lomax = 554000000, .spd = 0, .bs = 1, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
 	{ .lomax = 604000000, .spd = 0, .bs = 1, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
 	{ .lomax = 696000000, .spd = 0, .bs = 2, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
 	{ .lomax = 740000000, .spd = 0, .bs = 2, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0},
 	{ .lomax = 820000000, .spd = 0, .bs = 3, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
 	{ .lomax = 865000000, .spd = 0, .bs = 3, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0},
 	{ .lomax =         0, .spd = 0, .bs = 0, .bp = 0, .cp = 0, .gc3 = 0, .div1p5 = 0}
 };

 static int tda827xo_set_params(struct dvb_frontend *fe,
 			       struct dvb_frontend_parameters *params)
 {
 	struct tda827x_priv *priv = fe->tuner_priv;
 	u8 buf[14];

 	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
 			       .buf = buf, .len = sizeof(buf) };
 	int i, tuner_freq, if_freq;
 	u32 N;

 	dprintk("%s:\n", __FUNCTION__);
 	switch (params->u.ofdm.bandwidth) {
 	case BANDWIDTH_6_MHZ:
 		if_freq = 4000000;
 		break;
 	case BANDWIDTH_7_MHZ:
 		if_freq = 4500000;
 		break;
 	default:		   /* 8 MHz or Auto */
 		if_freq = 5000000;
 		break;
 	}
 	tuner_freq = params->frequency + if_freq;

 	i = 0;
 	while (tda827x_dvbt[i].lomax < tuner_freq) {
 		if(tda827x_dvbt[i + 1].lomax == 0)
 			break;
 		i++;
 	}

 	N = ((tuner_freq + 125000) / 250000) << (tda827x_dvbt[i].spd + 2);
 	buf[0] = 0;
 	buf[1] = (N>>8) | 0x40;
 	buf[2] = N & 0xff;
 	buf[3] = 0;
 	buf[4] = 0x52;
 	buf[5] = (tda827x_dvbt[i].spd << 6) + (tda827x_dvbt[i].div1p5 << 5) +
 				(tda827x_dvbt[i].bs << 3) + tda827x_dvbt[i].bp;
 	buf[6] = (tda827x_dvbt[i].gc3 << 4) + 0x8f;
 	buf[7] = 0xbf;
 	buf[8] = 0x2a;
 	buf[9] = 0x05;
 	buf[10] = 0xff;
 	buf[11] = 0x00;
 	buf[12] = 0x00;
 	buf[13] = 0x40;

 	msg.len = 14;
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
 		printk("%s: could not write to tuner at addr: 0x%02x\n",
 		       __FUNCTION__, priv->i2c_addr << 1);
 		return -EIO;
 	}
 	msleep(500);
 	/* correct CP value */
 	buf[0] = 0x30;
 	buf[1] = 0x50 + tda827x_dvbt[i].cp;
 	msg.len = 2;

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	i2c_transfer(priv->i2c_adap, &msg, 1);

 	priv->frequency = tuner_freq - if_freq; // FIXME
 	priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;

 	return 0;
 }

 static int tda827xo_sleep(struct dvb_frontend *fe)
 {
 	struct tda827x_priv *priv = fe->tuner_priv;
 	static u8 buf[] = { 0x30, 0xd0 };
 	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
 			       .buf = buf, .len = sizeof(buf) };

 	dprintk("%s:\n", __FUNCTION__);
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	i2c_transfer(priv->i2c_adap, &msg, 1);

 	if (priv->cfg && priv->cfg->sleep)
 		priv->cfg->sleep(fe);

 	return 0;
 }

 /* ------------------------------------------------------------------ */

 struct tda827xa_data {
 	u32 lomax;
 	u8  svco;
 	u8  spd;
 	u8  scr;
 	u8  sbs;
 	u8  gc3;
 };

 static const struct tda827xa_data tda827xa_dvbt[] = {
 	{ .lomax =  56875000, .svco = 3, .spd = 4, .scr = 0, .sbs = 0, .gc3 = 1},
 	{ .lomax =  67250000, .svco = 0, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
 	{ .lomax =  81250000, .svco = 1, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
 	{ .lomax =  97500000, .svco = 2, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
 	{ .lomax = 113750000, .svco = 3, .spd = 3, .scr = 0, .sbs = 1, .gc3 = 1},
 	{ .lomax = 134500000, .svco = 0, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
 	{ .lomax = 154000000, .svco = 1, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
 	{ .lomax = 162500000, .svco = 1, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
 	{ .lomax = 183000000, .svco = 2, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
 	{ .lomax = 195000000, .svco = 2, .spd = 2, .scr = 0, .sbs = 2, .gc3 = 1},
 	{ .lomax = 227500000, .svco = 3, .spd = 2, .scr = 0, .sbs = 2, .gc3 = 1},
 	{ .lomax = 269000000, .svco = 0, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 1},
 	{ .lomax = 290000000, .svco = 1, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 1},
 	{ .lomax = 325000000, .svco = 1, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
 	{ .lomax = 390000000, .svco = 2, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
 	{ .lomax = 455000000, .svco = 3, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
 	{ .lomax = 520000000, .svco = 0, .spd = 0, .scr = 0, .sbs = 3, .gc3 = 1},
 	{ .lomax = 538000000, .svco = 0, .spd = 0, .scr = 1, .sbs = 3, .gc3 = 1},
 	{ .lomax = 550000000, .svco = 1, .spd = 0, .scr = 0, .sbs = 3, .gc3 = 1},
 	{ .lomax = 620000000, .svco = 1, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
 	{ .lomax = 650000000, .svco = 1, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
 	{ .lomax = 700000000, .svco = 2, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
 	{ .lomax = 780000000, .svco = 2, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
 	{ .lomax = 820000000, .svco = 3, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
 	{ .lomax = 870000000, .svco = 3, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
 	{ .lomax = 911000000, .svco = 3, .spd = 0, .scr = 2, .sbs = 4, .gc3 = 0},
 	{ .lomax =         0, .svco = 0, .spd = 0, .scr = 0, .sbs = 0, .gc3 = 0}
 };

 static int tda827xa_set_params(struct dvb_frontend *fe,
 			       struct dvb_frontend_parameters *params)
 {
 	struct tda827x_priv *priv = fe->tuner_priv;
 	u8 buf[11];

 	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
 			       .buf = buf, .len = sizeof(buf) };

 	int i, tuner_freq, if_freq;
 	u32 N;

 	dprintk("%s:\n", __FUNCTION__);
 	if (priv->cfg && priv->cfg->lna_gain)
 		priv->cfg->lna_gain(fe, 1);
 	msleep(20);

 	switch (params->u.ofdm.bandwidth) {
 	case BANDWIDTH_6_MHZ:
 		if_freq = 4000000;
 		break;
 	case BANDWIDTH_7_MHZ:
 		if_freq = 4500000;
 		break;
 	default:		   /* 8 MHz or Auto */
 		if_freq = 5000000;
 		break;
 	}
 	tuner_freq = params->frequency + if_freq;

 	i = 0;
 	while (tda827xa_dvbt[i].lomax < tuner_freq) {
 		if(tda827xa_dvbt[i + 1].lomax == 0)
 			break;
 		i++;
 	}

 	N = ((tuner_freq + 31250) / 62500) << tda827xa_dvbt[i].spd;
 	buf[0] = 0;            // subaddress
 	buf[1] = N >> 8;
 	buf[2] = N & 0xff;
 	buf[3] = 0;
 	buf[4] = 0x16;
 	buf[5] = (tda827xa_dvbt[i].spd << 5) + (tda827xa_dvbt[i].svco << 3) +
 			tda827xa_dvbt[i].sbs;
 	buf[6] = 0x4b + (tda827xa_dvbt[i].gc3 << 4);
 	buf[7] = 0x1c;
 	buf[8] = 0x06;
 	buf[9] = 0x24;
 	buf[10] = 0x00;
 	msg.len = 11;
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
 		printk("%s: could not write to tuner at addr: 0x%02x\n",
 		       __FUNCTION__, priv->i2c_addr << 1);
 		return -EIO;
 	}
 	buf[0] = 0x90;
 	buf[1] = 0xff;
 	buf[2] = 0x60;
 	buf[3] = 0x00;
 	buf[4] = 0x59;  // lpsel, for 6MHz + 2
 	msg.len = 5;
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	i2c_transfer(priv->i2c_adap, &msg, 1);

 	buf[0] = 0xa0;
 	buf[1] = 0x40;
 	msg.len = 2;
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	i2c_transfer(priv->i2c_adap, &msg, 1);

 	msleep(11);
 	msg.flags = I2C_M_RD;
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	i2c_transfer(priv->i2c_adap, &msg, 1);
 	msg.flags = 0;

 	buf[1] >>= 4;
 	dprintk("tda8275a AGC2 gain is: %d\n", buf[1]);
 	if ((buf[1]) < 2) {
 		if (priv->cfg && priv->cfg->lna_gain)
 			priv->cfg->lna_gain(fe, 0);
 		buf[0] = 0x60;
 		buf[1] = 0x0c;
 		if (fe->ops.i2c_gate_ctrl)
 			fe->ops.i2c_gate_ctrl(fe, 1);
 		i2c_transfer(priv->i2c_adap, &msg, 1);
 	}

 	buf[0] = 0xc0;
 	buf[1] = 0x99;    // lpsel, for 6MHz + 2
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	i2c_transfer(priv->i2c_adap, &msg, 1);

 	buf[0] = 0x60;
 	buf[1] = 0x3c;
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	i2c_transfer(priv->i2c_adap, &msg, 1);

 	/* correct CP value */
 	buf[0] = 0x30;
 	buf[1] = 0x10 + tda827xa_dvbt[i].scr;
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	i2c_transfer(priv->i2c_adap, &msg, 1);

 	msleep(163);
 	buf[0] = 0xc0;
 	buf[1] = 0x39;  // lpsel, for 6MHz + 2
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	i2c_transfer(priv->i2c_adap, &msg, 1);

 	msleep(3);
 	/* freeze AGC1 */
 	buf[0] = 0x50;
 	buf[1] = 0x4f + (tda827xa_dvbt[i].gc3 << 4);
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	i2c_transfer(priv->i2c_adap, &msg, 1);

 	priv->frequency = tuner_freq - if_freq; // FIXME
 	priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;

 	return 0;
 }

 static int tda827xa_sleep(struct dvb_frontend *fe)
 {
 	struct tda827x_priv *priv = fe->tuner_priv;
 	static u8 buf[] = { 0x30, 0x90 };
 	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
 			       .buf = buf, .len = sizeof(buf) };

 	dprintk("%s:\n", __FUNCTION__);
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);

 	i2c_transfer(priv->i2c_adap, &msg, 1);

 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 0);

 	if (priv->cfg && priv->cfg->sleep)
 		priv->cfg->sleep(fe);

 	return 0;
 }

 static int tda827x_release(struct dvb_frontend *fe)
 {
 	kfree(fe->tuner_priv);
 	fe->tuner_priv = NULL;
 	return 0;
 }

 static int tda827x_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 {
 	struct tda827x_priv *priv = fe->tuner_priv;
 	*frequency = priv->frequency;
 	return 0;
 }

 static int tda827x_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
 {
 	struct tda827x_priv *priv = fe->tuner_priv;
 	*bandwidth = priv->bandwidth;
 	return 0;
 }

 static int tda827x_init(struct dvb_frontend *fe)
 {
 	struct tda827x_priv *priv = fe->tuner_priv;
 	dprintk("%s:\n", __FUNCTION__);
 	if (priv->cfg && priv->cfg->init)
 		priv->cfg->init(fe);

 	return 0;
 }

 static int tda827x_probe_version(struct dvb_frontend *fe);

 static int tda827x_initial_init(struct dvb_frontend *fe)
 {
 	int ret;
 	ret = tda827x_probe_version(fe);
 	if (ret)
 		return ret;
 	return fe->ops.tuner_ops.init(fe);
 }

 static int tda827x_initial_sleep(struct dvb_frontend *fe)
 {
 	int ret;
 	ret = tda827x_probe_version(fe);
 	if (ret)
 		return ret;
 	return fe->ops.tuner_ops.sleep(fe);
 }

 static struct dvb_tuner_ops tda827xo_tuner_ops = {
 	.info = {
 		.name = "Philips TDA827X",
 		.frequency_min  =  55000000,
 		.frequency_max  = 860000000,
 		.frequency_step =    250000
 	},
 	.release = tda827x_release,
 	.init = tda827x_initial_init,
 	.sleep = tda827x_initial_sleep,
 	.set_params = tda827xo_set_params,
 	.get_frequency = tda827x_get_frequency,
 	.get_bandwidth = tda827x_get_bandwidth,
 };

 static struct dvb_tuner_ops tda827xa_tuner_ops = {
 	.info = {
 		.name = "Philips TDA827XA",
 		.frequency_min  =  44000000,
 		.frequency_max  = 906000000,
 		.frequency_step =     62500
 	},
 	.release = tda827x_release,
 	.init = tda827x_init,
 	.sleep = tda827xa_sleep,
 	.set_params = tda827xa_set_params,
 	.get_frequency = tda827x_get_frequency,
 	.get_bandwidth = tda827x_get_bandwidth,
 };

 static int tda827x_probe_version(struct dvb_frontend *fe)
 {	u8 data;
 	struct tda827x_priv *priv = fe->tuner_priv;
 	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = I2C_M_RD,
 			       .buf = &data, .len = 1 };
 	if (fe->ops.i2c_gate_ctrl)
 		fe->ops.i2c_gate_ctrl(fe, 1);
 	if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
 		printk("%s: could not read from tuner at addr: 0x%02x\n",
 		       __FUNCTION__, msg.addr << 1);
 		return -EIO;
 	}
 	if ((data & 0x3c) == 0) {
 		dprintk("tda827x tuner found\n");
 		fe->ops.tuner_ops.init  = tda827x_init;
 		fe->ops.tuner_ops.sleep = tda827xo_sleep;
 	} else {
 		dprintk("tda827xa tuner found\n");
 		memcpy(&fe->ops.tuner_ops, &tda827xa_tuner_ops, sizeof(struct dvb_tuner_ops));
 	}
 	return 0;
 }

 struct dvb_frontend *tda827x_attach(struct dvb_frontend *fe, int addr,
 				    struct i2c_adapter *i2c,
 				    struct tda827x_config *cfg)
 {
 	struct tda827x_priv *priv = NULL;

 	dprintk("%s:\n", __FUNCTION__);
 	priv = kzalloc(sizeof(struct tda827x_priv), GFP_KERNEL);
 	if (priv == NULL)
 		return NULL;

 	priv->i2c_addr = addr;
 	priv->i2c_adap = i2c;
 	priv->cfg = cfg;
 	memcpy(&fe->ops.tuner_ops, &tda827xo_tuner_ops, sizeof(struct dvb_tuner_ops));

 	fe->tuner_priv = priv;

 	return fe;
 }

 EXPORT_SYMBOL(tda827x_attach);

 module_param(debug, int, 0644);
 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

 MODULE_DESCRIPTION("DVB TDA827x driver");
 MODULE_AUTHOR("Hartmut Hackmann <hartmut.hackmann@t-online.de>");
 MODULE_AUTHOR("Michael Krufky <mkrufky@linuxtv.org>");
 MODULE_LICENSE("GPL");

 /*
  * Overrides for Emacs so that we follow Linus's tabbing style.
  * ---------------------------------------------------------------------------
  * Local variables:
  * c-basic-offset: 8
  * End:
  */
	/*
	*
	* (c) 2005 Hartmut Hackmann
	* (c) 2007 Michael Krufky
	*
	* 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 <linux/module.h>
	#include <linux/dvb/frontend.h>
	#include <asm/types.h>

	#include "tda827x.h"

	static int debug = 0;
	#define dprintk(args...) \
	do { \
	if (debug) printk(KERN_DEBUG "tda827x: " args); \
	} while (0)

	struct tda827x_priv {
	int i2c_addr;
	struct i2c_adapter *i2c_adap;
	struct tda827x_config *cfg;
	u32 frequency;
	u32 bandwidth;
	};

	struct tda827x_data {
	u32 lomax;
	u8 spd;
	u8 bs;
	u8 bp;
	u8 cp;
	u8 gc3;
	u8 div1p5;
	};

	static const struct tda827x_data tda827x_dvbt[] = {
	{ .lomax = 62000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
	{ .lomax = 66000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 1},
	{ .lomax = 76000000, .spd = 3, .bs = 1, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
	{ .lomax = 84000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 3, .div1p5 = 0},
	{ .lomax = 93000000, .spd = 3, .bs = 2, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 98000000, .spd = 3, .bs = 3, .bp = 0, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 109000000, .spd = 3, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 123000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 133000000, .spd = 2, .bs = 3, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 151000000, .spd = 2, .bs = 1, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 154000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 181000000, .spd = 2, .bs = 2, .bp = 1, .cp = 0, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 185000000, .spd = 2, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 217000000, .spd = 2, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 244000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 265000000, .spd = 1, .bs = 3, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 302000000, .spd = 1, .bs = 1, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 324000000, .spd = 1, .bs = 2, .bp = 2, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 370000000, .spd = 1, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 454000000, .spd = 1, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 493000000, .spd = 0, .bs = 2, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 530000000, .spd = 0, .bs = 3, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 1},
	{ .lomax = 554000000, .spd = 0, .bs = 1, .bp = 3, .cp = 0, .gc3 = 1, .div1p5 = 0},
	{ .lomax = 604000000, .spd = 0, .bs = 1, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 696000000, .spd = 0, .bs = 2, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 740000000, .spd = 0, .bs = 2, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 820000000, .spd = 0, .bs = 3, .bp = 4, .cp = 0, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 865000000, .spd = 0, .bs = 3, .bp = 4, .cp = 1, .gc3 = 0, .div1p5 = 0},
	{ .lomax = 0, .spd = 0, .bs = 0, .bp = 0, .cp = 0, .gc3 = 0, .div1p5 = 0}
	};

	static int tda827xo_set_params(struct dvb_frontend *fe,
	struct dvb_frontend_parameters *params)
	{
	struct tda827x_priv *priv = fe->tuner_priv;
	u8 buf[14];

	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
	.buf = buf, .len = sizeof(buf) };
	int i, tuner_freq, if_freq;
	u32 N;

	dprintk("%s:\n", __FUNCTION__);
	switch (params->u.ofdm.bandwidth) {
	case BANDWIDTH_6_MHZ:
	if_freq = 4000000;
	break;
	case BANDWIDTH_7_MHZ:
	if_freq = 4500000;
	break;
	default: /* 8 MHz or Auto */
	if_freq = 5000000;
	break;
	}
	tuner_freq = params->frequency + if_freq;

	i = 0;
	while (tda827x_dvbt[i].lomax < tuner_freq) {
	if(tda827x_dvbt[i + 1].lomax == 0)
	break;
	i++;
	}

	N = ((tuner_freq + 125000) / 250000) << (tda827x_dvbt[i].spd + 2);
	buf[0] = 0;
	buf[1] = (N>>8) \| 0x40;
	buf[2] = N & 0xff;
	buf[3] = 0;
	buf[4] = 0x52;
	buf[5] = (tda827x_dvbt[i].spd << 6) + (tda827x_dvbt[i].div1p5 << 5) +
	(tda827x_dvbt[i].bs << 3) + tda827x_dvbt[i].bp;
	buf[6] = (tda827x_dvbt[i].gc3 << 4) + 0x8f;
	buf[7] = 0xbf;
	buf[8] = 0x2a;
	buf[9] = 0x05;
	buf[10] = 0xff;
	buf[11] = 0x00;
	buf[12] = 0x00;
	buf[13] = 0x40;

	msg.len = 14;
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
	printk("%s: could not write to tuner at addr: 0x%02x\n",
	__FUNCTION__, priv->i2c_addr << 1);
	return -EIO;
	}
	msleep(500);
	/* correct CP value */
	buf[0] = 0x30;
	buf[1] = 0x50 + tda827x_dvbt[i].cp;
	msg.len = 2;

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	priv->frequency = tuner_freq - if_freq; // FIXME
	priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;

	return 0;
	}

	static int tda827xo_sleep(struct dvb_frontend *fe)
	{
	struct tda827x_priv *priv = fe->tuner_priv;
	static u8 buf[] = { 0x30, 0xd0 };
	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
	.buf = buf, .len = sizeof(buf) };

	dprintk("%s:\n", __FUNCTION__);
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	if (priv->cfg && priv->cfg->sleep)
	priv->cfg->sleep(fe);

	return 0;
	}

	/* ------------------------------------------------------------------ */

	struct tda827xa_data {
	u32 lomax;
	u8 svco;
	u8 spd;
	u8 scr;
	u8 sbs;
	u8 gc3;
	};

	static const struct tda827xa_data tda827xa_dvbt[] = {
	{ .lomax = 56875000, .svco = 3, .spd = 4, .scr = 0, .sbs = 0, .gc3 = 1},
	{ .lomax = 67250000, .svco = 0, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
	{ .lomax = 81250000, .svco = 1, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
	{ .lomax = 97500000, .svco = 2, .spd = 3, .scr = 0, .sbs = 0, .gc3 = 1},
	{ .lomax = 113750000, .svco = 3, .spd = 3, .scr = 0, .sbs = 1, .gc3 = 1},
	{ .lomax = 134500000, .svco = 0, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
	{ .lomax = 154000000, .svco = 1, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
	{ .lomax = 162500000, .svco = 1, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
	{ .lomax = 183000000, .svco = 2, .spd = 2, .scr = 0, .sbs = 1, .gc3 = 1},
	{ .lomax = 195000000, .svco = 2, .spd = 2, .scr = 0, .sbs = 2, .gc3 = 1},
	{ .lomax = 227500000, .svco = 3, .spd = 2, .scr = 0, .sbs = 2, .gc3 = 1},
	{ .lomax = 269000000, .svco = 0, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 1},
	{ .lomax = 290000000, .svco = 1, .spd = 1, .scr = 0, .sbs = 2, .gc3 = 1},
	{ .lomax = 325000000, .svco = 1, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
	{ .lomax = 390000000, .svco = 2, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
	{ .lomax = 455000000, .svco = 3, .spd = 1, .scr = 0, .sbs = 3, .gc3 = 1},
	{ .lomax = 520000000, .svco = 0, .spd = 0, .scr = 0, .sbs = 3, .gc3 = 1},
	{ .lomax = 538000000, .svco = 0, .spd = 0, .scr = 1, .sbs = 3, .gc3 = 1},
	{ .lomax = 550000000, .svco = 1, .spd = 0, .scr = 0, .sbs = 3, .gc3 = 1},
	{ .lomax = 620000000, .svco = 1, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
	{ .lomax = 650000000, .svco = 1, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
	{ .lomax = 700000000, .svco = 2, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
	{ .lomax = 780000000, .svco = 2, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
	{ .lomax = 820000000, .svco = 3, .spd = 0, .scr = 0, .sbs = 4, .gc3 = 0},
	{ .lomax = 870000000, .svco = 3, .spd = 0, .scr = 1, .sbs = 4, .gc3 = 0},
	{ .lomax = 911000000, .svco = 3, .spd = 0, .scr = 2, .sbs = 4, .gc3 = 0},
	{ .lomax = 0, .svco = 0, .spd = 0, .scr = 0, .sbs = 0, .gc3 = 0}
	};

	static int tda827xa_set_params(struct dvb_frontend *fe,
	struct dvb_frontend_parameters *params)
	{
	struct tda827x_priv *priv = fe->tuner_priv;
	u8 buf[11];

	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
	.buf = buf, .len = sizeof(buf) };

	int i, tuner_freq, if_freq;
	u32 N;

	dprintk("%s:\n", __FUNCTION__);
	if (priv->cfg && priv->cfg->lna_gain)
	priv->cfg->lna_gain(fe, 1);
	msleep(20);

	switch (params->u.ofdm.bandwidth) {
	case BANDWIDTH_6_MHZ:
	if_freq = 4000000;
	break;
	case BANDWIDTH_7_MHZ:
	if_freq = 4500000;
	break;
	default: /* 8 MHz or Auto */
	if_freq = 5000000;
	break;
	}
	tuner_freq = params->frequency + if_freq;

	i = 0;
	while (tda827xa_dvbt[i].lomax < tuner_freq) {
	if(tda827xa_dvbt[i + 1].lomax == 0)
	break;
	i++;
	}

	N = ((tuner_freq + 31250) / 62500) << tda827xa_dvbt[i].spd;
	buf[0] = 0; // subaddress
	buf[1] = N >> 8;
	buf[2] = N & 0xff;
	buf[3] = 0;
	buf[4] = 0x16;
	buf[5] = (tda827xa_dvbt[i].spd << 5) + (tda827xa_dvbt[i].svco << 3) +
	tda827xa_dvbt[i].sbs;
	buf[6] = 0x4b + (tda827xa_dvbt[i].gc3 << 4);
	buf[7] = 0x1c;
	buf[8] = 0x06;
	buf[9] = 0x24;
	buf[10] = 0x00;
	msg.len = 11;
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
	printk("%s: could not write to tuner at addr: 0x%02x\n",
	__FUNCTION__, priv->i2c_addr << 1);
	return -EIO;
	}
	buf[0] = 0x90;
	buf[1] = 0xff;
	buf[2] = 0x60;
	buf[3] = 0x00;
	buf[4] = 0x59; // lpsel, for 6MHz + 2
	msg.len = 5;
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	buf[0] = 0xa0;
	buf[1] = 0x40;
	msg.len = 2;
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	msleep(11);
	msg.flags = I2C_M_RD;
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);
	msg.flags = 0;

	buf[1] >>= 4;
	dprintk("tda8275a AGC2 gain is: %d\n", buf[1]);
	if ((buf[1]) < 2) {
	if (priv->cfg && priv->cfg->lna_gain)
	priv->cfg->lna_gain(fe, 0);
	buf[0] = 0x60;
	buf[1] = 0x0c;
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);
	}

	buf[0] = 0xc0;
	buf[1] = 0x99; // lpsel, for 6MHz + 2
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	buf[0] = 0x60;
	buf[1] = 0x3c;
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	/* correct CP value */
	buf[0] = 0x30;
	buf[1] = 0x10 + tda827xa_dvbt[i].scr;
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	msleep(163);
	buf[0] = 0xc0;
	buf[1] = 0x39; // lpsel, for 6MHz + 2
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	msleep(3);
	/* freeze AGC1 */
	buf[0] = 0x50;
	buf[1] = 0x4f + (tda827xa_dvbt[i].gc3 << 4);
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	i2c_transfer(priv->i2c_adap, &msg, 1);

	priv->frequency = tuner_freq - if_freq; // FIXME
	priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;

	return 0;
	}

	static int tda827xa_sleep(struct dvb_frontend *fe)
	{
	struct tda827x_priv *priv = fe->tuner_priv;
	static u8 buf[] = { 0x30, 0x90 };
	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = 0,
	.buf = buf, .len = sizeof(buf) };

	dprintk("%s:\n", __FUNCTION__);
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);

	i2c_transfer(priv->i2c_adap, &msg, 1);

	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 0);

	if (priv->cfg && priv->cfg->sleep)
	priv->cfg->sleep(fe);

	return 0;
	}

	static int tda827x_release(struct dvb_frontend *fe)
	{
	kfree(fe->tuner_priv);
	fe->tuner_priv = NULL;
	return 0;
	}

	static int tda827x_get_frequency(struct dvb_frontend fe, u32 frequency)
	{
	struct tda827x_priv *priv = fe->tuner_priv;
	*frequency = priv->frequency;
	return 0;
	}

	static int tda827x_get_bandwidth(struct dvb_frontend fe, u32 bandwidth)
	{
	struct tda827x_priv *priv = fe->tuner_priv;
	*bandwidth = priv->bandwidth;
	return 0;
	}

	static int tda827x_init(struct dvb_frontend *fe)
	{
	struct tda827x_priv *priv = fe->tuner_priv;
	dprintk("%s:\n", __FUNCTION__);
	if (priv->cfg && priv->cfg->init)
	priv->cfg->init(fe);

	return 0;
	}

	static int tda827x_probe_version(struct dvb_frontend *fe);

	static int tda827x_initial_init(struct dvb_frontend *fe)
	{
	int ret;
	ret = tda827x_probe_version(fe);
	if (ret)
	return ret;
	return fe->ops.tuner_ops.init(fe);
	}

	static int tda827x_initial_sleep(struct dvb_frontend *fe)
	{
	int ret;
	ret = tda827x_probe_version(fe);
	if (ret)
	return ret;
	return fe->ops.tuner_ops.sleep(fe);
	}

	static struct dvb_tuner_ops tda827xo_tuner_ops = {
	.info = {
	.name = "Philips TDA827X",
	.frequency_min = 55000000,
	.frequency_max = 860000000,
	.frequency_step = 250000
	},
	.release = tda827x_release,
	.init = tda827x_initial_init,
	.sleep = tda827x_initial_sleep,
	.set_params = tda827xo_set_params,
	.get_frequency = tda827x_get_frequency,
	.get_bandwidth = tda827x_get_bandwidth,
	};

	static struct dvb_tuner_ops tda827xa_tuner_ops = {
	.info = {
	.name = "Philips TDA827XA",
	.frequency_min = 44000000,
	.frequency_max = 906000000,
	.frequency_step = 62500
	},
	.release = tda827x_release,
	.init = tda827x_init,
	.sleep = tda827xa_sleep,
	.set_params = tda827xa_set_params,
	.get_frequency = tda827x_get_frequency,
	.get_bandwidth = tda827x_get_bandwidth,
	};

	static int tda827x_probe_version(struct dvb_frontend *fe)
	{ u8 data;
	struct tda827x_priv *priv = fe->tuner_priv;
	struct i2c_msg msg = { .addr = priv->i2c_addr, .flags = I2C_M_RD,
	.buf = &data, .len = 1 };
	if (fe->ops.i2c_gate_ctrl)
	fe->ops.i2c_gate_ctrl(fe, 1);
	if (i2c_transfer(priv->i2c_adap, &msg, 1) != 1) {
	printk("%s: could not read from tuner at addr: 0x%02x\n",
	__FUNCTION__, msg.addr << 1);
	return -EIO;
	}
	if ((data & 0x3c) == 0) {
	dprintk("tda827x tuner found\n");
	fe->ops.tuner_ops.init = tda827x_init;
	fe->ops.tuner_ops.sleep = tda827xo_sleep;
	} else {
	dprintk("tda827xa tuner found\n");
	memcpy(&fe->ops.tuner_ops, &tda827xa_tuner_ops, sizeof(struct dvb_tuner_ops));
	}
	return 0;
	}

	struct dvb_frontend tda827x_attach(struct dvb_frontend fe, int addr,
	struct i2c_adapter *i2c,
	struct tda827x_config *cfg)
	{
	struct tda827x_priv *priv = NULL;

	dprintk("%s:\n", __FUNCTION__);
	priv = kzalloc(sizeof(struct tda827x_priv), GFP_KERNEL);
	if (priv == NULL)
	return NULL;

	priv->i2c_addr = addr;
	priv->i2c_adap = i2c;
	priv->cfg = cfg;
	memcpy(&fe->ops.tuner_ops, &tda827xo_tuner_ops, sizeof(struct dvb_tuner_ops));

	fe->tuner_priv = priv;

	return fe;
	}

	EXPORT_SYMBOL(tda827x_attach);

	module_param(debug, int, 0644);
	MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

	MODULE_DESCRIPTION("DVB TDA827x driver");
	MODULE_AUTHOR("Hartmut Hackmann <hartmut.hackmann@t-online.de>");
	MODULE_AUTHOR("Michael Krufky <mkrufky@linuxtv.org>");
	MODULE_LICENSE("GPL");

	/*
	* Overrides for Emacs so that we follow Linus's tabbing style.
	* ---------------------------------------------------------------------------
	* Local variables:
	* c-basic-offset: 8
	* End:
	*/