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[PATCH] v4l: bug fix to correct tea5767 autodetection

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This patch does correct radio chip autodetection to avoid misdetecting
mt20xx microtune as tea5767 chip.

Signed-off-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Mauro Carvalho Chehab 2005-08-01 21:11:38 -07:00 committed by Linus Torvalds
parent 43f2f3d343
commit 001abc93bf
1 changed files with 10 additions and 3 deletions
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13
drivers/media/video/tea5767.c
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@ -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 1.26 2005/07/27 12:00:36 mkrufky Exp $
* $Id: tea5767.c,v 1.27 2005/07/31 12:10:56 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
@ -296,7 +296,7 @@ int tea5767_autodetection(struct i2c_client *c)
int rc;
struct tuner *t = i2c_get_clientdata(c);
if (5 != (rc = i2c_master_recv(c, buffer, 5))) {
if (7 != (rc = i2c_master_recv(c, buffer, 7))) {
tuner_warn("It is not a TEA5767. Received %i bytes.\n", rc);
return EINVAL;
}
@ -323,6 +323,12 @@ int tea5767_autodetection(struct i2c_client *c)
return EINVAL;
}
/* 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;
}
tuner_warn("TEA5767 detected.\n");
return 0;
}
@ -331,7 +337,8 @@ int tea5767_tuner_init(struct i2c_client *c)
{
struct tuner *t = i2c_get_clientdata(c);
tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5767HN FM Radio");
tuner_info("type set to %d (%s)\n", t->type,
"Philips TEA5767HN FM Radio");
strlcpy(c->name, "tea5767", sizeof(c->name));
t->tv_freq = set_tv_freq;