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V4L/DVB (7435): tda18271: add function tda18271_charge_pump_source 

Force the main pll charge pump or cal pll charge pump to source current
to the main pll loop filter or cal pll loop filter, respectively.

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2008-04-22 14:46:23 -03:00 committed by Mauro Carvalho Chehab
parent 40194b2b1b
commit 4efb0ca5d0
3 changed files with 30 additions and 16 deletions
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21
drivers/media/dvb/frontends/tda18271-common.c
View File

@ -217,6 +217,21 @@ int tda18271_write_regs(struct dvb_frontend *fe, int idx, int len)
/*---------------------------------------------------------------------*/
int tda18271_charge_pump_source(struct dvb_frontend *fe,
enum tda18271_pll pll, int force)
{
struct tda18271_priv *priv = fe->tuner_priv;
unsigned char *regs = priv->tda18271_regs;
int r_cp = (pll == TDA18271_CAL_PLL) ? R_EB7 : R_EB4;
regs[r_cp] &= ~0x20;
regs[r_cp] |= ((force & 1) << 5);
tda18271_write_regs(fe, r_cp, 1);
return 0;
}
int tda18271_init_regs(struct dvb_frontend *fe)
{
struct tda18271_priv *priv = fe->tuner_priv;
@ -359,13 +374,11 @@ int tda18271_init_regs(struct dvb_frontend *fe)
if ((priv->id) == TDA18271HDC2) {
/* main pll cp source on */
regs[R_EB4] = 0x61;
tda18271_write_regs(fe, R_EB4, 1);
tda18271_charge_pump_source(fe, TDA18271_MAIN_PLL, 1);
msleep(1);
/* main pll cp source off */
regs[R_EB4] = 0x41;
tda18271_write_regs(fe, R_EB4, 1);
tda18271_charge_pump_source(fe, TDA18271_MAIN_PLL, 0);
}
msleep(5); /* pll locking */

18
drivers/media/dvb/frontends/tda18271-fe.c
View File

@ -119,14 +119,12 @@ static int tda18271_channel_configuration(struct dvb_frontend *fe,
tda18271_write_regs(fe, R_TM, 7);
/* main pll charge pump source */
regs[R_EB4] |= 0x20;
tda18271_write_regs(fe, R_EB4, 1);
tda18271_charge_pump_source(fe, TDA18271_MAIN_PLL, 1);
msleep(1);
/* normal operation for the main pll */
regs[R_EB4] &= ~0x20;
tda18271_write_regs(fe, R_EB4, 1);
tda18271_charge_pump_source(fe, TDA18271_MAIN_PLL, 0);
msleep(20);
@ -285,12 +283,10 @@ static int tda18271_calibrate_rf(struct dvb_frontend *fe, u32 freq)
tda18271_write_regs(fe, R_EB13, 1);
/* main pll charge pump source */
regs[R_EB4] |= 0x20;
tda18271_write_regs(fe, R_EB4, 1);
tda18271_charge_pump_source(fe, TDA18271_MAIN_PLL, 1);
/* cal pll charge pump source */
regs[R_EB7] |= 0x20;
tda18271_write_regs(fe, R_EB7, 1);
tda18271_charge_pump_source(fe, TDA18271_CAL_PLL, 1);
/* force dcdc converter to 0 V */
regs[R_EB14] = 0x00;
@ -328,12 +324,10 @@ static int tda18271_calibrate_rf(struct dvb_frontend *fe, u32 freq)
/* --------------------------------------------------------------- */
/* normal operation for the main pll */
regs[R_EB4] &= ~0x20;
tda18271_write_regs(fe, R_EB4, 1);
tda18271_charge_pump_source(fe, TDA18271_MAIN_PLL, 0);
/* normal operation for the cal pll */
regs[R_EB7] &= ~0x20;
tda18271_write_regs(fe, R_EB7, 1);
tda18271_charge_pump_source(fe, TDA18271_CAL_PLL, 0);
msleep(10); /* plls locking */

7
drivers/media/dvb/frontends/tda18271-priv.h
View File

@ -86,6 +86,11 @@ struct tda18271_rf_tracking_filter_cal {
int rf_b2;
};
enum tda18271_pll {
TDA18271_MAIN_PLL,
TDA18271_CAL_PLL,
};
enum tda18271_mode {
TDA18271_ANALOG,
TDA18271_DIGITAL,
@ -188,6 +193,8 @@ 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_charge_pump_source(struct dvb_frontend *fe,
enum tda18271_pll pll, int force);
extern int tda18271_set_standby_mode(struct dvb_frontend *fe,
int sm, int sm_lt, int sm_xt);