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>

3 files changed, 30 insertions, 16 deletions

diff --git a/drivers/media/dvb/frontends/tda18271-common.c b/drivers/media/dvb/frontends/tda18271-common.c
index 84d430c..e27a762 100644
--- a/drivers/media/dvb/frontends/tda18271-common.c
+++ b/drivers/media/dvb/frontends/tda18271-common.c
@@ -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 */
diff --git a/drivers/media/dvb/frontends/tda18271-fe.c b/drivers/media/dvb/frontends/tda18271-fe.c
index b3b0425..46905a7 100644
--- a/drivers/media/dvb/frontends/tda18271-fe.c
+++ b/drivers/media/dvb/frontends/tda18271-fe.c
@@ -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 */
 
diff --git a/drivers/media/dvb/frontends/tda18271-priv.h b/drivers/media/dvb/frontends/tda18271-priv.h
index ecb588e..2a37f79 100644
--- a/drivers/media/dvb/frontends/tda18271-priv.h
+++ b/drivers/media/dvb/frontends/tda18271-priv.h
@@ -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);