[media] stv090x: make sleep/wakeup specific to the demod path

The STV0900 features two demodulator paths in one chip. Thus it is not
possible to use the generic power off function of the chip when sending
one of them to standby. The other path will stop working in that case.

The sleep function now switches off functionality specific to the demod
path. The global stuff is only switched off, when both paths are in
sleep mode. The wakeup function always turns on the global functionality
and then works specific to the path.
Signed-off-by: Andreas Regel <andreas.regel@gmx.de>
Signed-off-by: Oliver Endriss <o.endriss@gmx.de>
Signed-off-by: Manu Abraham <manu@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb/frontends/stv090x.c

@@ -3846,6 +3846,7 @@ static int stv090x_sleep(struct dvb_frontend *fe)
 {
 	struct stv090x_state *state = fe->demodulator_priv;
 	u32 reg;
+	u8 full_standby = 0;
 
 	if (stv090x_i2c_gate_ctrl(state, 1) < 0)
 		goto err;
@@ -3858,24 +3859,119 @@ static int stv090x_sleep(struct dvb_frontend *fe)
 	if (stv090x_i2c_gate_ctrl(state, 0) < 0)
 		goto err;
 
-	dprintk(FE_DEBUG, 1, "Set %s to sleep",
-		state->device == STV0900 ? "STV0900" : "STV0903");
+	dprintk(FE_DEBUG, 1, "Set %s(%d) to sleep",
+		state->device == STV0900 ? "STV0900" : "STV0903",
+		state->demod);
 
-	reg = stv090x_read_reg(state, STV090x_SYNTCTRL);
-	STV090x_SETFIELD(reg, STANDBY_FIELD, 0x01);
-	if (stv090x_write_reg(state, STV090x_SYNTCTRL, reg) < 0)
-		goto err;
+	mutex_lock(&state->internal->demod_lock);
 
+	switch (state->demod) {
+	case STV090x_DEMODULATOR_0:
+		/* power off ADC 1 */
 		reg = stv090x_read_reg(state, STV090x_TSTTNR1);
 		STV090x_SETFIELD(reg, ADC1_PON_FIELD, 0);
 		if (stv090x_write_reg(state, STV090x_TSTTNR1, reg) < 0)
 			goto err;
+		/* power off DiSEqC 1 */
+		reg = stv090x_read_reg(state, STV090x_TSTTNR2);
+		STV090x_SETFIELD(reg, DISEQC1_PON_FIELD, 0);
+		if (stv090x_write_reg(state, STV090x_TSTTNR2, reg) < 0)
+			goto err;
+
+		/* check whether path 2 is already sleeping, that is when
+		   ADC2 is off */
+		reg = stv090x_read_reg(state, STV090x_TSTTNR3);
+		if (STV090x_GETFIELD(reg, ADC2_PON_FIELD) == 0)
+			full_standby = 1;
+
+		/* stop clocks */
+		reg = stv090x_read_reg(state, STV090x_STOPCLK1);
+		/* packet delineator 1 clock */
+		STV090x_SETFIELD(reg, STOP_CLKPKDT1_FIELD, 1);
+		/* ADC 1 clock */
+		STV090x_SETFIELD(reg, STOP_CLKADCI1_FIELD, 1);
+		/* FEC clock is shared between the two paths, only stop it
+		   when full standby is possible */
+		if (full_standby)
+			STV090x_SETFIELD(reg, STOP_CLKFEC_FIELD, 1);
+		if (stv090x_write_reg(state, STV090x_STOPCLK1, reg) < 0)
+			goto err;
+		reg = stv090x_read_reg(state, STV090x_STOPCLK2);
+		/* sampling 1 clock */
+		STV090x_SETFIELD(reg, STOP_CLKSAMP1_FIELD, 1);
+		/* viterbi 1 clock */
+		STV090x_SETFIELD(reg, STOP_CLKVIT1_FIELD, 1);
+		/* TS clock is shared between the two paths, only stop it
+		   when full standby is possible */
+		if (full_standby)
+			STV090x_SETFIELD(reg, STOP_CLKTS_FIELD, 1);
+		if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0)
+			goto err;
+		break;
+
+	case STV090x_DEMODULATOR_1:
+		/* power off ADC 2 */
+		reg = stv090x_read_reg(state, STV090x_TSTTNR3);
+		STV090x_SETFIELD(reg, ADC2_PON_FIELD, 0);
+		if (stv090x_write_reg(state, STV090x_TSTTNR3, reg) < 0)
+			goto err;
+		/* power off DiSEqC 2 */
+		reg = stv090x_read_reg(state, STV090x_TSTTNR4);
+		STV090x_SETFIELD(reg, DISEQC2_PON_FIELD, 0);
+		if (stv090x_write_reg(state, STV090x_TSTTNR4, reg) < 0)
+			goto err;
+
+		/* check whether path 1 is already sleeping, that is when
+		   ADC1 is off */
+		reg = stv090x_read_reg(state, STV090x_TSTTNR1);
+		if (STV090x_GETFIELD(reg, ADC1_PON_FIELD) == 0)
+			full_standby = 1;
+
+		/* stop clocks */
+		reg = stv090x_read_reg(state, STV090x_STOPCLK1);
+		/* packet delineator 2 clock */
+		STV090x_SETFIELD(reg, STOP_CLKPKDT2_FIELD, 1);
+		/* ADC 2 clock */
+		STV090x_SETFIELD(reg, STOP_CLKADCI2_FIELD, 1);
+		/* FEC clock is shared between the two paths, only stop it
+		   when full standby is possible */
+		if (full_standby)
+			STV090x_SETFIELD(reg, STOP_CLKFEC_FIELD, 1);
+		if (stv090x_write_reg(state, STV090x_STOPCLK1, reg) < 0)
+			goto err;
+		reg = stv090x_read_reg(state, STV090x_STOPCLK2);
+		/* sampling 2 clock */
+		STV090x_SETFIELD(reg, STOP_CLKSAMP2_FIELD, 1);
+		/* viterbi 2 clock */
+		STV090x_SETFIELD(reg, STOP_CLKVIT2_FIELD, 1);
+		/* TS clock is shared between the two paths, only stop it
+		   when full standby is possible */
+		if (full_standby)
+			STV090x_SETFIELD(reg, STOP_CLKTS_FIELD, 1);
+		if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0)
+			goto err;
+		break;
+
+	default:
+		dprintk(FE_ERROR, 1, "Wrong demodulator!");
+		break;
+	}
+
+	if (full_standby) {
+		/* general power off */
+		reg = stv090x_read_reg(state, STV090x_SYNTCTRL);
+		STV090x_SETFIELD(reg, STANDBY_FIELD, 0x01);
+		if (stv090x_write_reg(state, STV090x_SYNTCTRL, reg) < 0)
+			goto err;
+	}
 
+	mutex_unlock(&state->internal->demod_lock);
 	return 0;
 
 err_gateoff:
 	stv090x_i2c_gate_ctrl(state, 0);
 err:
+	mutex_unlock(&state->internal->demod_lock);
 	dprintk(FE_ERROR, 1, "I/O error");
 	return -1;
 }
@@ -3885,21 +3981,94 @@ static int stv090x_wakeup(struct dvb_frontend *fe)
 	struct stv090x_state *state = fe->demodulator_priv;
 	u32 reg;
 
-	dprintk(FE_DEBUG, 1, "Wake %s from standby",
-		state->device == STV0900 ? "STV0900" : "STV0903");
+	dprintk(FE_DEBUG, 1, "Wake %s(%d) from standby",
+		state->device == STV0900 ? "STV0900" : "STV0903",
+		state->demod);
+
+	mutex_lock(&state->internal->demod_lock);
 
+	/* general power on */
 	reg = stv090x_read_reg(state, STV090x_SYNTCTRL);
 	STV090x_SETFIELD(reg, STANDBY_FIELD, 0x00);
 	if (stv090x_write_reg(state, STV090x_SYNTCTRL, reg) < 0)
 		goto err;
 
+	switch (state->demod) {
+	case STV090x_DEMODULATOR_0:
+		/* power on ADC 1 */
 		reg = stv090x_read_reg(state, STV090x_TSTTNR1);
 		STV090x_SETFIELD(reg, ADC1_PON_FIELD, 1);
 		if (stv090x_write_reg(state, STV090x_TSTTNR1, reg) < 0)
 			goto err;
+		/* power on DiSEqC 1 */
+		reg = stv090x_read_reg(state, STV090x_TSTTNR2);
+		STV090x_SETFIELD(reg, DISEQC1_PON_FIELD, 1);
+		if (stv090x_write_reg(state, STV090x_TSTTNR2, reg) < 0)
+			goto err;
+
+		/* activate clocks */
+		reg = stv090x_read_reg(state, STV090x_STOPCLK1);
+		/* packet delineator 1 clock */
+		STV090x_SETFIELD(reg, STOP_CLKPKDT1_FIELD, 0);
+		/* ADC 1 clock */
+		STV090x_SETFIELD(reg, STOP_CLKADCI1_FIELD, 0);
+		/* FEC clock */
+		STV090x_SETFIELD(reg, STOP_CLKFEC_FIELD, 0);
+		if (stv090x_write_reg(state, STV090x_STOPCLK1, reg) < 0)
+			goto err;
+		reg = stv090x_read_reg(state, STV090x_STOPCLK2);
+		/* sampling 1 clock */
+		STV090x_SETFIELD(reg, STOP_CLKSAMP1_FIELD, 0);
+		/* viterbi 1 clock */
+		STV090x_SETFIELD(reg, STOP_CLKVIT1_FIELD, 0);
+		/* TS clock */
+		STV090x_SETFIELD(reg, STOP_CLKTS_FIELD, 0);
+		if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0)
+			goto err;
+		break;
+
+	case STV090x_DEMODULATOR_1:
+		/* power on ADC 2 */
+		reg = stv090x_read_reg(state, STV090x_TSTTNR3);
+		STV090x_SETFIELD(reg, ADC2_PON_FIELD, 1);
+		if (stv090x_write_reg(state, STV090x_TSTTNR3, reg) < 0)
+			goto err;
+		/* power on DiSEqC 2 */
+		reg = stv090x_read_reg(state, STV090x_TSTTNR4);
+		STV090x_SETFIELD(reg, DISEQC2_PON_FIELD, 1);
+		if (stv090x_write_reg(state, STV090x_TSTTNR4, reg) < 0)
+			goto err;
 
+		/* activate clocks */
+		reg = stv090x_read_reg(state, STV090x_STOPCLK1);
+		/* packet delineator 2 clock */
+		STV090x_SETFIELD(reg, STOP_CLKPKDT2_FIELD, 0);
+		/* ADC 2 clock */
+		STV090x_SETFIELD(reg, STOP_CLKADCI2_FIELD, 0);
+		/* FEC clock */
+		STV090x_SETFIELD(reg, STOP_CLKFEC_FIELD, 0);
+		if (stv090x_write_reg(state, STV090x_STOPCLK1, reg) < 0)
+			goto err;
+		reg = stv090x_read_reg(state, STV090x_STOPCLK2);
+		/* sampling 2 clock */
+		STV090x_SETFIELD(reg, STOP_CLKSAMP2_FIELD, 0);
+		/* viterbi 2 clock */
+		STV090x_SETFIELD(reg, STOP_CLKVIT2_FIELD, 0);
+		/* TS clock */
+		STV090x_SETFIELD(reg, STOP_CLKTS_FIELD, 0);
+		if (stv090x_write_reg(state, STV090x_STOPCLK2, reg) < 0)
+			goto err;
+		break;
+
+	default:
+		dprintk(FE_ERROR, 1, "Wrong demodulator!");
+		break;
+	}
+
+	mutex_unlock(&state->internal->demod_lock);
 	return 0;
 err:
+	mutex_unlock(&state->internal->demod_lock);
 	dprintk(FE_ERROR, 1, "I/O error");
 	return -1;
 }
@@ -4622,20 +4791,10 @@ struct dvb_frontend *stv090x_attach(const struct stv090x_config *config,
 	mutex_init(&state->internal->demod_lock);
 	mutex_init(&state->internal->tuner_lock);
 
-	if (stv090x_sleep(&state->frontend) < 0) {
-		dprintk(FE_ERROR, 1, "Error putting device to sleep");
-		goto error;
-	}
-
 	if (stv090x_setup(&state->frontend) < 0) {
 		dprintk(FE_ERROR, 1, "Error setting up device");
 		goto error;
 	}
-	if (stv090x_wakeup(&state->frontend) < 0) {
-		dprintk(FE_ERROR, 1, "Error waking device");
-		goto error;
-	}
-
 	dprintk(FE_ERROR, 1, "Attaching %s demodulator(%d) Cut=0x%02x",
 	       state->device == STV0900 ? "STV0900" : "STV0903",
 	       demod,