From f1f32849d65ab1eacfedbabb624876ac06c1af9f Mon Sep 17 00:00:00 2001
From: Michael Krufky <mkrufky@linuxtv.org>
Date: Sat, 3 Nov 2007 22:14:54 -0300
Subject: V4L/DVB (6543): tda8290: enable probing of tda8295

Prevent the tda8295 from falsely being detected as a tda9887

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

diff --git a/drivers/media/video/tda8290.c b/drivers/media/video/tda8290.c
index c7705cb..dd23996 100644
--- a/drivers/media/video/tda8290.c
+++ b/drivers/media/video/tda8290.c
@@ -632,6 +632,46 @@ static int tda829x_find_tuner(struct dvb_frontend *fe)
 	return 0;
 }
 
+static int tda8290_probe(struct tuner_i2c_props *i2c_props)
+{
+#define TDA8290_ID 0x89
+	unsigned char tda8290_id[] = { 0x1f, 0x00 };
+
+	/* detect tda8290 */
+	tuner_i2c_xfer_send(i2c_props, &tda8290_id[0], 1);
+	tuner_i2c_xfer_recv(i2c_props, &tda8290_id[1], 1);
+
+	if (tda8290_id[1] == TDA8290_ID) {
+		if (tuner_debug)
+			printk(KERN_DEBUG "%s: tda8290 detected @ %d-%04x\n",
+			       __FUNCTION__, i2c_adapter_id(i2c_props->adap),
+			       i2c_props->addr);
+		return 0;
+	}
+
+	return -1;
+}
+
+static int tda8295_probe(struct tuner_i2c_props *i2c_props)
+{
+#define TDA8295_ID 0x8a
+	unsigned char tda8295_id[] = { 0x2f, 0x00 };
+
+	/* detect tda8295 */
+	tuner_i2c_xfer_send(i2c_props, &tda8295_id[0], 1);
+	tuner_i2c_xfer_recv(i2c_props, &tda8295_id[1], 1);
+
+	if (tda8295_id[1] == TDA8295_ID) {
+		if (tuner_debug)
+			printk(KERN_DEBUG "%s: tda8295 detected @ %d-%04x\n",
+			       __FUNCTION__, i2c_adapter_id(i2c_props->adap),
+			       i2c_props->addr);
+		return 0;
+	}
+
+	return -1;
+}
+
 static struct analog_tuner_ops tda8290_tuner_ops = {
 	.set_tv_freq    = tda8290_set_freq,
 	.set_radio_freq = tda8290_set_freq,
@@ -655,11 +695,6 @@ int tda829x_attach(struct tuner *t)
 	struct dvb_frontend *fe = &t->fe;
 	struct tda8290_priv *priv = NULL;
 
-	unsigned char tda8290_id[] = { 0x1f, 0x00 };
-#define TDA8290_ID 0x89
-	unsigned char tda8295_id[] = { 0x2f, 0x00 };
-#define TDA8295_ID 0x8a
-
 	priv = kzalloc(sizeof(struct tda8290_priv), GFP_KERNEL);
 	if (priv == NULL)
 		return -ENOMEM;
@@ -671,18 +706,12 @@ int tda829x_attach(struct tuner *t)
 	priv->cfg.tuner_callback = t->tuner_callback;
 	priv->t = t;
 
-	/* detect tda8290 */
-	tuner_i2c_xfer_send(&priv->i2c_props, &tda8290_id[0], 1);
-	tuner_i2c_xfer_recv(&priv->i2c_props, &tda8290_id[1], 1);
-	if (tda8290_id[1] == TDA8290_ID) {
+	if (tda8290_probe(&priv->i2c_props) == 0) {
 		priv->ver = TDA8290;
 		fe->ops.analog_demod_ops = &tda8290_tuner_ops;
 	}
 
-	/* detect tda8295 */
-	tuner_i2c_xfer_send(&priv->i2c_props, &tda8295_id[0], 1);
-	tuner_i2c_xfer_recv(&priv->i2c_props, &tda8295_id[1], 1);
-	if (tda8295_id[1] == TDA8295_ID) {
+	if (tda8295_probe(&priv->i2c_props) == 0) {
 		priv->ver = TDA8295;
 		fe->ops.analog_demod_ops = &tda8295_tuner_ops;
 	}
@@ -704,7 +733,7 @@ int tda829x_attach(struct tuner *t)
 }
 EXPORT_SYMBOL_GPL(tda829x_attach);
 
-int tda8290_probe(struct tuner *t)
+int tda829x_probe(struct tuner *t)
 {
 	struct tuner_i2c_props i2c_props = {
 		.adap = t->i2c->adapter,
@@ -718,6 +747,11 @@ int tda8290_probe(struct tuner *t)
 	unsigned char addr_dto_lsb = 0x07;
 	unsigned char data;
 
+	if ((tda8290_probe(&i2c_props) == 0) ||
+	    (tda8295_probe(&i2c_props) == 0))
+		return 0;
+
+	/* fall back to old probing method */
 	tuner_i2c_xfer_send(&i2c_props, easy_mode_b, 2);
 	tuner_i2c_xfer_send(&i2c_props, soft_reset, 2);
 	tuner_i2c_xfer_send(&i2c_props, &addr_dto_lsb, 1);
@@ -734,7 +768,7 @@ int tda8290_probe(struct tuner *t)
 	tuner_i2c_xfer_send(&i2c_props, restore_9886, 3);
 	return -1;
 }
-EXPORT_SYMBOL_GPL(tda8290_probe);
+EXPORT_SYMBOL_GPL(tda829x_probe);
 
 MODULE_DESCRIPTION("Philips/NXP TDA8290/TDA8295 analog IF demodulator driver");
 MODULE_AUTHOR("Gerd Knorr, Hartmut Hackmann, Michael Krufky");
diff --git a/drivers/media/video/tda8290.h b/drivers/media/video/tda8290.h
index 8151737..3a1f045 100644
--- a/drivers/media/video/tda8290.h
+++ b/drivers/media/video/tda8290.h
@@ -21,11 +21,11 @@
 #include "tuner-driver.h"
 
 #if defined(CONFIG_TUNER_TDA8290) || (defined(CONFIG_TUNER_TDA8290_MODULE) && defined(MODULE))
-extern int tda8290_probe(struct tuner *t);
+extern int tda829x_probe(struct tuner *t);
 
 extern int tda829x_attach(struct tuner *t);
 #else
-static inline int tda8290_probe(struct tuner *t)
+static inline int tda829x_probe(struct tuner *t)
 {
 	printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __FUNCTION__);
 	return -EINVAL;
diff --git a/drivers/media/video/tuner-core.c b/drivers/media/video/tuner-core.c
index 17c873c..3ec50db 100644
--- a/drivers/media/video/tuner-core.c
+++ b/drivers/media/video/tuner-core.c
@@ -649,8 +649,8 @@ static int tuner_attach(struct i2c_adapter *adap, int addr, int kind)
 		case 0x4b:
 			/* If chip is not tda8290, don't register.
 			   since it can be tda9887*/
-			if (tda8290_probe(t) == 0) {
-				tuner_dbg("chip at addr %x is a tda8290\n", addr);
+			if (tda829x_probe(t) == 0) {
+				tuner_dbg("tda829x detected\n");
 			} else {
 				/* Default is being tda9887 */
 				t->type = TUNER_TDA9887;
-- 
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