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V4L/DVB (7027): tda18271: put the device in standby mode during sleep()

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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: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2008-01-13 17:01:01 -03:00 committed by Mauro Carvalho Chehab
parent 6bfa665724
commit 518d87399b
3 changed files with 60 additions and 5 deletions
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36
drivers/media/dvb/frontends/tda18271-common.c
View File

@ -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 */

26
drivers/media/dvb/frontends/tda18271-fe.c
View File

@ -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 @@ fail:
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,

3
drivers/media/dvb/frontends/tda18271-priv.h
View File

@ -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);