V4L/DVB (5240): Qt1010: use i2c_gate_ctrl where appropriate

This patch adds calls to i2c_gate_ctrl in the qt1010 dvb tuner module,
while removing the temporary hack in au6610 and gl861.
Tested successfully against fi-Oulu frequencies with
MSI Megasky 580 GL861 and Sigmatek DVB-110 AU6610.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/dvb/dvb-usb/au6610.c

@@ -145,19 +145,6 @@ static struct qt1010_config au6610_qt1010_config = {
 
 static int au6610_qt1010_tuner_attach(struct dvb_usb_adapter *adap)
 {
-	/* TODO FIXME; probably I2C gate.
-	QT1010 tuner does not respond before we write 0x1a to ZL10353 demod
-	register 0x62. This ought to be done somewhere in demod initialization.
-	This solution is temporary hack. */
-
-	u8 buf[2] = { 0x62, 0x1a };
-	struct i2c_msg msg = { .addr = au6610_zl10353_config.demod_address,
-			       .flags = 0, .buf = buf, .len = 2	};
-
-	if (i2c_transfer(&adap->dev->i2c_adap, &msg, 1) != 1) {
-		printk(KERN_WARNING "au6610 tuner attach failed\n");
-		return -EREMOTEIO;
-	}
 	return dvb_attach(qt1010_attach,
 			  adap->fe, &adap->dev->i2c_adap,
 			  &au6610_qt1010_config) == NULL ? -ENODEV : 0;

drivers/media/dvb/dvb-usb/gl861.c

@@ -122,19 +122,6 @@ static struct qt1010_config gl861_qt1010_config = {
 
 static int gl861_tuner_attach(struct dvb_usb_adapter *adap)
 {
-	/* TODO FIXME; probably I2C gate.
-	QT1010 tuner does not respond before we write 0x1a to ZL10353 demod
-	register 0x62. This ought to be done somewhere in demod initialization.
-	This solution is temporary hack. */
-
-	u8 buf[2] = { 0x62, 0x1a };
-	struct i2c_msg msg = { .addr = gl861_zl10353_config.demod_address,
-			       .flags = 0, .buf = buf, .len = 2	};
-
-	if (i2c_transfer(&adap->dev->i2c_adap, &msg, 1) != 1) {
-		printk(KERN_WARNING "gl861 tuner attach failed\n");
-		return -EREMOTEIO;
-	}
 	return dvb_attach(qt1010_attach,
 			  adap->fe, &adap->dev->i2c_adap,
 			  &gl861_qt1010_config) == NULL ? -ENODEV : 0;

drivers/media/dvb/frontends/qt1010.c

@@ -149,6 +149,9 @@ static int qt1010_set_params(struct dvb_frontend *fe, struct dvb_frontend_parame
 	priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;
 	priv->frequency = freq;
 
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
 	/* reg 05 base value */
 	if      (freq < 290000000) reg05 = 0x14; /* 290 MHz */
 	else if (freq < 610000000) reg05 = 0x34; /* 610 MHz */
@@ -242,6 +245,9 @@ static int qt1010_set_params(struct dvb_frontend *fe, struct dvb_frontend_parame
 	if (debug)
 		qt1010_dump_regs(priv);
 
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
+
 	return 0;
 }
 
@@ -277,7 +283,6 @@ static int qt1010_init_meas1(struct qt1010_priv *priv, u8 oper, u8 reg, u8 reg_i
 	return qt1010_writereg(priv, 0x1e, 0x00);
 }
 
-
 static u8 qt1010_init_meas2(struct qt1010_priv *priv, u8 reg_init_val, u8 *retval)
 {
 	u8 i, val;
@@ -347,6 +352,9 @@ static int qt1010_init(struct dvb_frontend *fe)
 		{ QT1010_WR, 0x08, 0x08 }
 	};
 
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
 	for (i = 0; i < sizeof(i2c_data) / sizeof(*i2c_data); i++) {
 		switch (i2c_data[i].oper) {
 		case QT1010_WR:
@@ -430,6 +438,9 @@ struct dvb_frontend * qt1010_attach(struct dvb_frontend *fe,
 	priv->cfg      = cfg;
 	priv->i2c      = i2c;
 
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
+
 
 	/* Try to detect tuner chip. Probably this is not correct register. */
 	if (qt1010_readreg(priv, 0x29, &id) != 0 || (id != 0x39)) {
@@ -437,6 +448,9 @@ struct dvb_frontend * qt1010_attach(struct dvb_frontend *fe,
 		return NULL;
 	}
 
+	if (fe->ops.i2c_gate_ctrl)
+		fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
+
 	printk(KERN_INFO "Quantek QT1010 successfully identified.\n");
 	memcpy(&fe->ops.tuner_ops, &qt1010_tuner_ops, sizeof(struct dvb_tuner_ops));