diff options
Diffstat (limited to 'linux/drivers/media/video/tuner-simple.c')
| -rw-r--r-- | linux/drivers/media/video/tuner-simple.c | 46 |
1 files changed, 24 insertions, 22 deletions
diff --git a/linux/drivers/media/video/tuner-simple.c b/linux/drivers/media/video/tuner-simple.c index 50012433d..b2a3ac189 100644 --- a/linux/drivers/media/video/tuner-simple.c +++ b/linux/drivers/media/video/tuner-simple.c @@ -1,5 +1,5 @@ /* - * $Id: tuner-simple.c,v 1.70 2006/01/12 17:06:49 mkrufky Exp $ + * $Id: tuner-simple.c,v 1.71 2006/01/15 17:04:52 hverkuil Exp $ * * i2c tv tuner chip device driver * controls all those simple 4-control-bytes style tuners. @@ -162,7 +162,7 @@ static void default_set_tv_freq(struct i2c_client *c, unsigned int freq) u8 config, tuneraddr; u16 div; struct tunertype *tun; - unsigned char buffer[4]; + u8 buffer[4]; int rc, IFPCoff, i, j; tun = &tuners[t->type]; @@ -173,6 +173,11 @@ static void default_set_tv_freq(struct i2c_client *c, unsigned int freq) continue; break; } + if (i == tun->params[j].count) { + tuner_dbg("TV frequency out of range (%d > %d)", + freq, tun->params[j].ranges[i - 1].limit); + freq = tun->params[j].ranges[--i].limit; + } config = tun->params[j].ranges[i].cb; /* i == 0 -> VHF_LO */ /* i == 1 -> VHF_HI */ @@ -265,20 +270,6 @@ static void default_set_tv_freq(struct i2c_client *c, unsigned int freq) break; } - /* - * Philips FI1216MK2 remark from specification : - * for channel selection involving band switching, and to ensure - * smooth tuning to the desired channel without causing - * unnecessary charge pump action, it is recommended to consider - * the difference between wanted channel frequency and the - * current channel frequency. Unnecessary charge pump action - * will result in very low tuning voltage which may drive the - * oscillator to extreme conditions. - * - * Progfou: specification says to send config data before - * frequency in case (wanted frequency < current frequency). - */ - /* IFPCoff = Video Intermediate Frequency - Vif: 940 =16*58.75 NTSC/J (Japan) 732 =16*45.75 M/N STD @@ -310,7 +301,7 @@ static void default_set_tv_freq(struct i2c_client *c, unsigned int freq) offset / 16, offset % 16 * 100 / 16, div); - if (t->type == TUNER_PHILIPS_SECAM && freq < t->freq) { + if (tuners[t->type].params->cb_first_if_lower_freq && div < t->last_div) { buffer[0] = tun->params[j].config; buffer[1] = config; buffer[2] = (div>>8) & 0x7f; @@ -321,6 +312,7 @@ static void default_set_tv_freq(struct i2c_client *c, unsigned int freq) buffer[2] = tun->params[j].config; buffer[3] = config; } + t->last_div = div; tuner_dbg("tv 0x%02x 0x%02x 0x%02x 0x%02x\n", buffer[0],buffer[1],buffer[2],buffer[3]); @@ -363,8 +355,8 @@ static void default_set_radio_freq(struct i2c_client *c, unsigned int freq) { struct tunertype *tun; struct tuner *t = i2c_get_clientdata(c); - unsigned char buffer[4]; - unsigned div; + u8 buffer[4]; + u16 div; int rc, j; tun = &tuners[t->type]; @@ -400,9 +392,19 @@ static void default_set_radio_freq(struct i2c_client *c, unsigned int freq) } buffer[0] = (div>>8) & 0x7f; buffer[1] = div & 0xff; + if (tuners[t->type].params->cb_first_if_lower_freq && div < t->last_div) { + buffer[0] = buffer[2]; + buffer[1] = buffer[3]; + buffer[2] = (div>>8) & 0x7f; + buffer[3] = div & 0xff; + } else { + buffer[0] = (div>>8) & 0x7f; + buffer[1] = div & 0xff; + } tuner_dbg("radio 0x%02x 0x%02x 0x%02x 0x%02x\n", buffer[0],buffer[1],buffer[2],buffer[3]); + t->last_div = div; if (4 != (rc = i2c_master_send(c,buffer,4))) tuner_warn("i2c i/o error: rc == %d (should be 4)\n",rc); @@ -416,10 +418,10 @@ int default_tuner_init(struct i2c_client *c) t->type, tuners[t->type].name); strlcpy(c->name, tuners[t->type].name, sizeof(c->name)); - t->tv_freq = default_set_tv_freq; - t->radio_freq = default_set_radio_freq; + t->set_tv_freq = default_set_tv_freq; + t->set_radio_freq = default_set_radio_freq; t->has_signal = tuner_signal; - t->is_stereo = tuner_stereo; + t->is_stereo = tuner_stereo; t->standby = NULL; return 0; |