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Commit 518d8739 authored by Michael Krufky's avatar Michael Krufky Committed by Mauro Carvalho Chehab
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V4L/DVB (7027): tda18271: put the device in standby mode during sleep() 



Add function, tda18271_set_standby_mode.

During sleep, enter standby mode with slave tuner output enabled,
loop through on and xtal oscillator on.

Signed-off-by: default avatarMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@infradead.org>
parent 6bfa6657

drivers/media/dvb/frontends/tda18271-common.c

+36 −0
Original line number Diff line number Diff line
@@ -452,6 +452,42 @@ int tda18271_init_regs(struct dvb_frontend *fe) 


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



/*

 *  Standby modes, EP3 [7:5]

 *

 *  | SM  || SM_LT || SM_XT || mode description

 *  |=====\\=======\\=======\\===================================

 *  |  0  ||   0   ||   0   || normal mode

 *  |-----||-------||-------||-----------------------------------

 *  |     ||       ||       || standby mode w/ slave tuner output

 *  |  1  ||   0   ||   0   || & loop thru & xtal oscillator on

 *  |-----||-------||-------||-----------------------------------

 *  |  1  ||   1   ||   0   || standby mode w/ xtal oscillator on

 *  |-----||-------||-------||-----------------------------------

 *  |  1  ||   1   ||   1   || power off

 *

 */



int tda18271_set_standby_mode(struct dvb_frontend *fe,

			      int sm, int sm_lt, int sm_xt)

{

	struct tda18271_priv *priv = fe->tuner_priv;

	unsigned char *regs = priv->tda18271_regs;



	tda_dbg("sm = %d, sm_lt = %d, sm_xt = %d\n", sm, sm_lt, sm_xt);



	regs[R_EP3]  &= ~0xe0; /* clear sm, sm_lt, sm_xt */

	regs[R_EP3]  |= sm    ? (1 << 7) : 0 |

			sm_lt ? (1 << 6) : 0 |

			sm_xt ? (1 << 5) : 0;



	tda18271_write_regs(fe, R_EP3, 1);



	return 0;

}



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



int tda18271_calc_main_pll(struct dvb_frontend *fe, u32 freq)

{

	/* sets main post divider & divider bytes, but does not write them */

drivers/media/dvb/frontends/tda18271-fe.c

+21 −5
Original line number Diff line number Diff line
@@ -201,8 +201,7 @@ static int tda18271_rf_tracking_filters_correction(struct dvb_frontend *fe, 
	u8 dc_over_dt, rf_tab;



	/* power up */

	regs[R_EP3]  &= ~0xe0; /* sm = 0, sm_lt = 0, sm_xt = 0 */

	tda18271_write_regs(fe, R_EP3, 1);

	tda18271_set_standby_mode(fe, 0, 0, 0);



	/* read die current temperature */

	tm_current = tda18271_read_thermometer(fe);
@@ -256,9 +255,7 @@ static int tda18271_por(struct dvb_frontend *fe) 
	regs[R_EB21] |= 0x03; /* set agc2_gain to -6 dB */



	/* POR mode */

	regs[R_EP3]  &= ~0xe0; /* clear sm, sm_lt, sm_xt */

	regs[R_EP3]  |= 0x80; /* sm = 1, sm_lt = 0, sm_xt = 0 */

	tda18271_write_regs(fe, R_EP3, 1);

	tda18271_set_standby_mode(fe, 1, 0, 0);



	/* disable 1.5 MHz low pass filter */

	regs[R_EB23] &= ~0x04; /* forcelp_fc2_en = 0 */
@@ -610,6 +607,9 @@ static int tda18271_init(struct dvb_frontend *fe) 


	mutex_lock(&priv->lock);



	/* power up */

	tda18271_set_standby_mode(fe, 0, 0, 0);



	/* initialization */

	tda18271_ir_cal_init(fe);
@@ -953,6 +953,21 @@ static int tda18271_set_analog_params(struct dvb_frontend *fe, 
	return ret;

}



static int tda18271_sleep(struct dvb_frontend *fe)

{

	struct tda18271_priv *priv = fe->tuner_priv;



	mutex_lock(&priv->lock);



	/* standby mode w/ slave tuner output

	 * & loop thru & xtal oscillator on */

	tda18271_set_standby_mode(fe, 1, 0, 0);



	mutex_unlock(&priv->lock);



	return 0;

}



static int tda18271_release(struct dvb_frontend *fe)

{

	struct tda18271_priv *priv = fe->tuner_priv;
@@ -1096,6 +1111,7 @@ static struct dvb_tuner_ops tda18271_tuner_ops = { 
		.frequency_step =     62500

	},

	.init              = tda18271_init,

	.sleep             = tda18271_sleep,

	.set_params        = tda18271_set_params,

	.set_analog_params = tda18271_set_analog_params,

	.release           = tda18271_release,

drivers/media/dvb/frontends/tda18271-priv.h

+3 −0
Original line number Diff line number Diff line
@@ -188,6 +188,9 @@ extern int tda18271_read_extended(struct dvb_frontend *fe); 
extern int tda18271_write_regs(struct dvb_frontend *fe, int idx, int len);

extern int tda18271_init_regs(struct dvb_frontend *fe);



extern int tda18271_set_standby_mode(struct dvb_frontend *fe,

				     int sm, int sm_lt, int sm_xt);



extern int tda18271_calc_main_pll(struct dvb_frontend *fe, u32 freq);

extern int tda18271_calc_cal_pll(struct dvb_frontend *fe, u32 freq);