tda8290.c

trident tm5600的linux驱动

/*

   i2c tv tuner chip device driver
   controls the philips tda8290+75 tuner chip combo.

   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.

   This "tda8290" module was split apart from the original "tuner" module.
*/

#include <linux/i2c.h>
#include <linux/delay.h>
#include "compat.h"
#include <linux/videodev.h>
#include "tuner-i2c.h"
#include "tda8290.h"
#include "tda827x.h"
#include "tda18271.h"

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "enable verbose debug messages");

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

struct tda8290_priv {
	struct tuner_i2c_props i2c_props;

	unsigned char tda8290_easy_mode;

	unsigned char tda827x_addr;

	unsigned char ver;
#define TDA8290   1
#define TDA8295   2
#define TDA8275   4
#define TDA8275A  8
#define TDA18271 16

	struct tda827x_config cfg;
};

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

static int tda8290_i2c_bridge(struct dvb_frontend *fe, int close)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char  enable[2] = { 0x21, 0xC0 };
	unsigned char disable[2] = { 0x21, 0x00 };
	unsigned char *msg;

	if (close) {
		msg = enable;
		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
		/* let the bridge stabilize */
		msleep(20);
	} else {
		msg = disable;
		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
	}

	return 0;
}

#if 1
static int tda8295_i2c_bridge(struct dvb_frontend *fe, int close)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char  enable[2] = { 0x45, 0xc1 };
	unsigned char disable[2] = { 0x46, 0x00 };
	unsigned char buf[3] = { 0x45, 0x01, 0x00 };
	unsigned char *msg;

	if (close) {
		msg = enable;
		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
		/* let the bridge stabilize */
		msleep(20);
	} else {
		msg = disable;
		tuner_i2c_xfer_send(&priv->i2c_props, msg, 1);
		tuner_i2c_xfer_recv(&priv->i2c_props, &msg[1], 1);

		buf[2] = msg[1];
		buf[2] &= ~0x04;
		tuner_i2c_xfer_send(&priv->i2c_props, buf, 3);
		msleep(5);

		msg[1] |= 0x04;
		tuner_i2c_xfer_send(&priv->i2c_props, msg, 2);
	}

	return 0;
}
#else
static int tda8295_i2c_bridge(struct dvb_frontend *fe, int close)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char buf[] = { 0x45, 0x00 };

	tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
	tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);

	buf[1] &= 0x3f;
	if (close)
		buf[1] |= 0xc0;
	else
		buf[1] |= 0x80;

	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);

	return 0;
}
#endif

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

static void set_audio(struct dvb_frontend *fe,
		      struct analog_parameters *params)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	char* mode;

	if (params->std & V4L2_STD_MN) {
		priv->tda8290_easy_mode = 0x01;
		mode = "MN";
	} else if (params->std & V4L2_STD_B) {
		priv->tda8290_easy_mode = 0x02;
		mode = "B";
	} else if (params->std & V4L2_STD_GH) {
		priv->tda8290_easy_mode = 0x04;
		mode = "GH";
	} else if (params->std & V4L2_STD_PAL_I) {
		priv->tda8290_easy_mode = 0x08;
		mode = "I";
	} else if (params->std & V4L2_STD_DK) {
		priv->tda8290_easy_mode = 0x10;
		mode = "DK";
	} else if (params->std & V4L2_STD_SECAM_L) {
		priv->tda8290_easy_mode = 0x20;
		mode = "L";
	} else if (params->std & V4L2_STD_SECAM_LC) {
		priv->tda8290_easy_mode = 0x40;
		mode = "LC";
	} else {
		priv->tda8290_easy_mode = 0x10;
		mode = "xx";
	}

	tuner_dbg("setting tda829x to system %s\n", mode);
}

static void tda8290_set_params(struct dvb_frontend *fe,
			       struct analog_parameters *params)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char soft_reset[]  = { 0x00, 0x00 };
	unsigned char easy_mode[]   = { 0x01, priv->tda8290_easy_mode };
	unsigned char expert_mode[] = { 0x01, 0x80 };
	unsigned char agc_out_on[]  = { 0x02, 0x00 };
	unsigned char gainset_off[] = { 0x28, 0x14 };
	unsigned char if_agc_spd[]  = { 0x0f, 0x88 };
	unsigned char adc_head_6[]  = { 0x05, 0x04 };
	unsigned char adc_head_9[]  = { 0x05, 0x02 };
	unsigned char adc_head_12[] = { 0x05, 0x01 };
	unsigned char pll_bw_nom[]  = { 0x0d, 0x47 };
	unsigned char pll_bw_low[]  = { 0x0d, 0x27 };
	unsigned char gainset_2[]   = { 0x28, 0x64 };
	unsigned char agc_rst_on[]  = { 0x0e, 0x0b };
	unsigned char agc_rst_off[] = { 0x0e, 0x09 };
	unsigned char if_agc_set[]  = { 0x0f, 0x81 };
	unsigned char addr_adc_sat  = 0x1a;
	unsigned char addr_agc_stat = 0x1d;
	unsigned char addr_pll_stat = 0x1b;
	unsigned char adc_sat, agc_stat,
		      pll_stat;
	int i;

	set_audio(fe, params);

	if (priv->cfg.config)
		tuner_dbg("tda827xa config is 0x%02x\n", priv->cfg.config);
	tuner_i2c_xfer_send(&priv->i2c_props, easy_mode, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, agc_out_on, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, soft_reset, 2);
	msleep(1);

	expert_mode[1] = priv->tda8290_easy_mode + 0x80;
	tuner_i2c_xfer_send(&priv->i2c_props, expert_mode, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, gainset_off, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, if_agc_spd, 2);
	if (priv->tda8290_easy_mode & 0x60)
		tuner_i2c_xfer_send(&priv->i2c_props, adc_head_9, 2);
	else
		tuner_i2c_xfer_send(&priv->i2c_props, adc_head_6, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_nom, 2);

	tda8290_i2c_bridge(fe, 1);

	if (fe->ops.tuner_ops.set_analog_params)
		fe->ops.tuner_ops.set_analog_params(fe, params);

	for (i = 0; i < 3; i++) {
		tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
		tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
		if (pll_stat & 0x80) {
			tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
			tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
			tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
			tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
			tuner_dbg("tda8290 is locked, AGC: %d\n", agc_stat);
			break;
		} else {
			tuner_dbg("tda8290 not locked, no signal?\n");
			msleep(100);
		}
	}
	/* adjust headroom resp. gain */
	if ((agc_stat > 115) || (!(pll_stat & 0x80) && (adc_sat < 20))) {
		tuner_dbg("adjust gain, step 1. Agc: %d, ADC stat: %d, lock: %d\n",
			   agc_stat, adc_sat, pll_stat & 0x80);
		tuner_i2c_xfer_send(&priv->i2c_props, gainset_2, 2);
		msleep(100);
		tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
		tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
		tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
		tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
		if ((agc_stat > 115) || !(pll_stat & 0x80)) {
			tuner_dbg("adjust gain, step 2. Agc: %d, lock: %d\n",
				   agc_stat, pll_stat & 0x80);
			if (priv->cfg.agcf)
				priv->cfg.agcf(fe);
			msleep(100);
			tuner_i2c_xfer_send(&priv->i2c_props, &addr_agc_stat, 1);
			tuner_i2c_xfer_recv(&priv->i2c_props, &agc_stat, 1);
			tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
			tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
			if((agc_stat > 115) || !(pll_stat & 0x80)) {
				tuner_dbg("adjust gain, step 3. Agc: %d\n", agc_stat);
				tuner_i2c_xfer_send(&priv->i2c_props, adc_head_12, 2);
				tuner_i2c_xfer_send(&priv->i2c_props, pll_bw_low, 2);
				msleep(100);
			}
		}
	}

	/* l/ l' deadlock? */
	if(priv->tda8290_easy_mode & 0x60) {
		tuner_i2c_xfer_send(&priv->i2c_props, &addr_adc_sat, 1);
		tuner_i2c_xfer_recv(&priv->i2c_props, &adc_sat, 1);
		tuner_i2c_xfer_send(&priv->i2c_props, &addr_pll_stat, 1);
		tuner_i2c_xfer_recv(&priv->i2c_props, &pll_stat, 1);
		if ((adc_sat > 20) || !(pll_stat & 0x80)) {
			tuner_dbg("trying to resolve SECAM L deadlock\n");
			tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_on, 2);
			msleep(40);
			tuner_i2c_xfer_send(&priv->i2c_props, agc_rst_off, 2);
		}
	}

	tda8290_i2c_bridge(fe, 0);
	tuner_i2c_xfer_send(&priv->i2c_props, if_agc_set, 2);
}

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

static void tda8295_power(struct dvb_frontend *fe, int enable)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char buf[] = { 0x30, 0x00 }; /* clb_stdbt */

	tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
	tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);

	if (enable)
		buf[1] = 0x01;
	else
		buf[1] = 0x03;

	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
}

static void tda8295_set_easy_mode(struct dvb_frontend *fe, int enable)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char buf[] = { 0x01, 0x00 };

	tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
	tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);

	if (enable)
		buf[1] = 0x01; /* rising edge sets regs 0x02 - 0x23 */
	else
		buf[1] = 0x00; /* reset active bit */

	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
}

static void tda8295_set_video_std(struct dvb_frontend *fe)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char buf[] = { 0x00, priv->tda8290_easy_mode };

	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);

	tda8295_set_easy_mode(fe, 1);
	msleep(20);
	tda8295_set_easy_mode(fe, 0);
}

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

static void tda8295_agc1_out(struct dvb_frontend *fe, int enable)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char buf[] = { 0x02, 0x00 }; /* DIV_FUNC */

	tuner_i2c_xfer_send(&priv->i2c_props, &buf[0], 1);
	tuner_i2c_xfer_recv(&priv->i2c_props, &buf[1], 1);

	if (enable)
		buf[1] &= ~0x40;
	else
		buf[1] |= 0x40;

	tuner_i2c_xfer_send(&priv->i2c_props, buf, 2);
}

static void tda8295_agc2_out(struct dvb_frontend *fe, int enable)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;
	unsigned char set_gpio_cf[]    = { 0x44, 0x00 };
	unsigned char set_gpio_val[]   = { 0x46, 0x00 };

	tuner_i2c_xfer_send(&priv->i2c_props, &set_gpio_cf[0], 1);
	tuner_i2c_xfer_recv(&priv->i2c_props, &set_gpio_cf[1], 1);
	tuner_i2c_xfer_send(&priv->i2c_props, &set_gpio_val[0], 1);
	tuner_i2c_xfer_recv(&priv->i2c_props, &set_gpio_val[1], 1);

	set_gpio_cf[1] &= 0xf0; /* clear GPIO_0 bits 3-0 */

	if (enable) {
		set_gpio_cf[1]  |= 0x01; /* config GPIO_0 as Open Drain Out */
		set_gpio_val[1] &= 0xfe; /* set GPIO_0 pin low */
	}
	tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_cf, 2);
	tuner_i2c_xfer_send(&priv->i2c_props, set_gpio_val, 2);
}

static int tda8295_has_signal(struct dvb_frontend *fe)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char hvpll_stat = 0x26;
	unsigned char ret;

	tuner_i2c_xfer_send(&priv->i2c_props, &hvpll_stat, 1);
	tuner_i2c_xfer_recv(&priv->i2c_props, &ret, 1);
	return (ret & 0x01) ? 65535 : 0;
}

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

static void tda8295_set_params(struct dvb_frontend *fe,
			       struct analog_parameters *params)
{
	struct tda8290_priv *priv = fe->analog_demod_priv;

	unsigned char blanking_mode[]     = { 0x1d, 0x00 };

	set_audio(fe, params);

	tuner_dbg("%s: freq = %d\n", __func__, params->frequency);

	tda8295_power(fe, 1);
	tda8295_agc1_out(fe, 1);

	tuner_i2c_xfer_send(&priv->i2c_props, &blanking_mode[0], 1);
	tuner_i2c_xfer_recv(&priv->i2c_props, &blanking_mode[1], 1);

	tda8295_set_video_std(fe);

	blanking_mode[1] = 0x03;
	tuner_i2c_xfer_send(&priv->i2c_props, blanking_mode, 2);
	msleep(20);

	tda8295_i2c_bridge(fe, 1);

	if (fe->ops.tuner_ops.set_analog_params)
		fe->ops.tuner_ops.set_analog_params(fe, params);

	if (priv->cfg.agcf)
		priv->cfg.agcf(fe);

	if (tda8295_has_signal(fe))
		tuner_dbg("tda8295 is locked\n");
	else
		tuner_dbg("tda8295 not locked, no signal?\n");