- tea5767_autodetection improved.

  Newer code works with CX88. Should be tested with other chipsets
  tea5767_tuner_init doesn't probe tuner anymore, allowing forcing
  tuner to 5767.
- Debug messages simplified to allow printing on one 80 char line at newer I2C Recv option.

        Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>

1 files changed, 17 insertions, 6 deletions

diff --git a/linux/drivers/media/video/tea5767.c b/linux/drivers/media/video/tea5767.c
index 445a6360e..f1c395b2c 100644
--- a/linux/drivers/media/video/tea5767.c
+++ b/linux/drivers/media/video/tea5767.c
@@ -2,7 +2,7 @@
  * For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview
  * I2C address is allways 0xC0.
  *
- * $Id: tea5767.c,v 1.24 2005/07/27 02:44:37 mchehab Exp $
+ * $Id: tea5767.c,v 1.25 2005/07/27 10:02:23 mchehab Exp $
  *
  * Copyright (c) 2005 Mauro Carvalho Chehab (mchehab@brturbo.com.br)
  * This code is placed under the terms of the GNU General Public License
@@ -293,16 +293,19 @@ static int tea5767_stereo(struct i2c_client *c)
 
 int tea5767_autodetection(struct i2c_client *c)
 {
-	unsigned char buffer[5] = { 0xff, 0xff, 0xff, 0xff, 0xff };
-	int rc,div;
+	unsigned char buffer[7] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+	int rc;
 	struct tuner *t = i2c_get_clientdata(c);
+#if 0 /* Needed if uncomment I2C send code below */
+	int div;
+#endif
 
 	if (5 != (rc = i2c_master_recv(c, buffer, 5))) {
 		tuner_warn("It is not a TEA5767. Received %i bytes.\n", rc);
 		return EINVAL;
 	}
 
-	/* If all bytes are the same then it's a TV tuner and not a tea5767 chip. */
+	/* If all bytes are the same then it's a TV tuner and not a tea5767 */
 	if (buffer[0] == buffer[1] && buffer[0] == buffer[2] &&
 	    buffer[0] == buffer[3] && buffer[0] == buffer[4]) {
 		tuner_warn("All bytes are equal. It is not a TEA5767\n");
@@ -318,8 +321,15 @@ int tea5767_autodetection(struct i2c_client *c)
 		tuner_warn("Chip ID is not zero. It is not a TEA5767\n");
 		return EINVAL;
 	}
+#if 1 /* On CX88, this works. Must be tested with other chipsets */
+	/* It seems that tea5767 returns 0xff after the 5th byte */
+	if ((buffer[5] != 0xff) || (buffer[6] != 0xff)) {
+		tuner_warn("Returned more than 5 bytes. It is not a TEA5767\n");
+		return EINVAL;
+	}	
+#endif
 
-#if 0
+#if 0 /*Sometimes, this code doesn't work */
 	/* Sets tuner at some freq (87.5 MHz) and see if it is ok */
 	div = ((87500 * 4000 + 700000 + 225000) + 16768) >> 15;
 	buffer[0] = ((div >> 8) & 0x3f) | TEA5767_MUTE;
@@ -355,9 +365,10 @@ int tea5767_tuner_init(struct i2c_client *c)
 {
 	struct tuner *t = i2c_get_clientdata(c);
 
+#if 0 /* By removing autodetection allows forcing TEA chip */
 	if (tea5767_autodetection(c) == EINVAL)
 		return EINVAL;
-
+#endif
 	tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5767HN FM Radio");
 	strlcpy(c->name, "tea5767", sizeof(c->name));