path: root/drivers/media/common/tuners/tda18271-fe.c

/*
    tda18271-fe.c - driver for the Philips / NXP TDA18271 silicon tuner

    Copyright (C) 2007, 2008 Michael Krufky <mkrufky@linuxtv.org>

    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/delay.h>
#include <linux/videodev2.h>
#include "tda18271-priv.h"

int tda18271_debug;
module_param_named(debug, tda18271_debug, int, 0644);
MODULE_PARM_DESC(debug, "set debug level "
		 "(info=1, map=2, reg=4, adv=8, cal=16 (or-able))");

static int tda18271_cal_on_startup;
module_param_named(cal, tda18271_cal_on_startup, int, 0644);
MODULE_PARM_DESC(cal, "perform RF tracking filter calibration on startup");

static DEFINE_MUTEX(tda18271_list_mutex);
static LIST_HEAD(hybrid_tuner_instance_list);

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

static inline int charge_pump_source(struct dvb_frontend *fe, int force)
{
	struct tda18271_priv *priv = fe->tuner_priv;
	return tda18271_charge_pump_source(fe,
					   (priv->role == TDA18271_SLAVE) ?
					   TDA18271_CAL_PLL :
					   TDA18271_MAIN_PLL, force);
}

static int tda18271_channel_configuration(struct dvb_frontend *fe,
					  struct tda18271_std_map_item *map,
					  u32 freq, u32 bw)
{
	struct tda18271_priv *priv = fe->tuner_priv;
	unsigned char *regs = priv->tda18271_regs;
	u32 N;

	/* update TV broadcast parameters */

	/* set standard */
	regs[R_EP3]  &= ~0x1f; /* clear std bits */
	regs[R_EP3]  |= (map->agc_mode << 3) | map->std;

	/* set rfagc to high speed mode */
	regs[R_EP3] &= ~0x04;

	/* set cal mode to normal */
	regs[R_EP4]  &= ~0x03;

	/* update IF output level & IF notch frequency */
	regs[R_EP4]  &= ~0x1c; /* clear if level bits */
	regs[R_EP4]  |= (map->if_lvl << 2);

	switch (priv->mode) {
	case TDA18271_ANALOG:
		regs[R_MPD]  &= ~0x80; /* IF notch = 0 */
		break;
	case TDA18271_DIGITAL:
		regs[R_MPD]  |= 0x80; /* IF notch = 1 */
		break;
	}

	/* update FM_RFn */
	regs[R_EP4]  &= ~0x80;
	regs[R_EP4]  |= map->fm_rfn << 7;

	/* update rf top / if top */
	regs[R_EB22]  = 0x00;
	regs[R_EB22] |= map->rfagc_top;
	tda18271_write_regs(fe, R_EB22, 1);

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

	/* disable Power Level Indicator */
	regs[R_EP1]  |= 0x40;

	/* frequency dependent parameters */

	tda18271_calc_ir_measure(fe, &freq);

	tda18271_calc_bp_filter(fe, &freq);

	tda18271_calc_rf_band(fe, &freq);

	tda18271_calc_gain_taper(fe, &freq);

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

	/* dual tuner and agc1 extra configuration */

	switch (priv->role) {
	case TDA18271_MASTER:
		regs[R_EB1]  |= 0x04; /* main vco */
		break;
	case TDA18271_SLAVE:
		regs[R_EB1]  &= ~0x04; /* cal vco */
		break;
	}

	/* agc1 always active */
	regs[R_EB1]  &= ~0x02;

	/* agc1 has priority on agc2 */
	regs[R_EB1]  &= ~0x01;

	tda18271_write_regs(fe, R_EB1, 1);

	/*