[PATCH] v4l: bug fix to correct tea5767 autodetection
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>
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@ -2,7 +2,7 @@
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* For Philips TEA5767 FM Chip used on some TV Cards like Prolink Pixelview
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* I2C address is allways 0xC0.
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*
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* $Id: tea5767.c,v 1.26 2005/07/27 12:00:36 mkrufky Exp $
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* $Id: tea5767.c,v 1.27 2005/07/31 12:10:56 mchehab Exp $
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*
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* Copyright (c) 2005 Mauro Carvalho Chehab (mchehab@brturbo.com.br)
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* This code is placed under the terms of the GNU General Public License
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@ -296,7 +296,7 @@ int tea5767_autodetection(struct i2c_client *c)
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int rc;
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struct tuner *t = i2c_get_clientdata(c);
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if (5 != (rc = i2c_master_recv(c, buffer, 5))) {
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if (7 != (rc = i2c_master_recv(c, buffer, 7))) {
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tuner_warn("It is not a TEA5767. Received %i bytes.\n", rc);
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return EINVAL;
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}
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@ -323,6 +323,12 @@ int tea5767_autodetection(struct i2c_client *c)
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return EINVAL;
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}
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/* It seems that tea5767 returns 0xff after the 5th byte */
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if ((buffer[5] != 0xff) || (buffer[6] != 0xff)) {
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tuner_warn("Returned more than 5 bytes. It is not a TEA5767\n");
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return EINVAL;
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}
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tuner_warn("TEA5767 detected.\n");
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return 0;
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}
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@ -331,7 +337,8 @@ int tea5767_tuner_init(struct i2c_client *c)
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{
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struct tuner *t = i2c_get_clientdata(c);
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tuner_info("type set to %d (%s)\n", t->type, "Philips TEA5767HN FM Radio");
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tuner_info("type set to %d (%s)\n", t->type,
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"Philips TEA5767HN FM Radio");
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strlcpy(c->name, "tea5767", sizeof(c->name));
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t->tv_freq = set_tv_freq;
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