diff options
Diffstat (limited to 'drivers/media/dvb/frontends/dvb-pll.c')
| -rw-r--r-- | drivers/media/dvb/frontends/dvb-pll.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/drivers/media/dvb/frontends/dvb-pll.c b/drivers/media/dvb/frontends/dvb-pll.c index 43084bfc0f1..e7978442fbe 100644 --- a/drivers/media/dvb/frontends/dvb-pll.c +++ b/drivers/media/dvb/frontends/dvb-pll.c @@ -27,6 +27,17 @@ /* ----------------------------------------------------------- */ /* descriptions */ +/* Set AGC TOP value to 103 dBuV: + 0x80 = Control Byte + 0x40 = 250 uA charge pump (irrelevant) + 0x18 = Aux Byte to follow + 0x06 = 64.5 kHz divider (irrelevant) + 0x01 = Disable Vt (aka sleep) + + 0x00 = AGC Time constant 2s Iagc = 300 nA (vs 0x80 = 9 nA) + 0x50 = AGC Take over point = 103 dBuV */ +static u8 tua603x_agc103[] = { 2, 0x80|0x40|0x18|0x06|0x01, 0x00|0x50 }; + struct dvb_pll_desc dvb_pll_thomson_dtt7579 = { .name = "Thomson dtt7579", .min = 177000000, @@ -113,6 +124,7 @@ struct dvb_pll_desc dvb_pll_thomson_dtt761x = { .min = 57000000, .max = 863000000, .count = 3, + .initdata = tua603x_agc103, .entries = { { 147000000, 44000000, 62500, 0x8e, 0x39 }, { 417000000, 44000000, 62500, 0x8e, 0x3a }, @@ -599,6 +611,31 @@ static int dvb_pll_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth) return 0; } +static int dvb_pll_init(struct dvb_frontend *fe) +{ + struct dvb_pll_priv *priv = fe->tuner_priv; + + if (priv->i2c == NULL) + return -EINVAL; + + if (priv->pll_desc->initdata) { + struct i2c_msg msg = { .flags = 0, + .addr = priv->pll_i2c_address, + .buf = priv->pll_desc->initdata + 1, + .len = priv->pll_desc->initdata[0] }; + + int result; + if (fe->ops.i2c_gate_ctrl) + fe->ops.i2c_gate_ctrl(fe, 1); + if ((result = i2c_transfer(priv->i2c, &msg, 1)) != 1) { + return result; + } + return 0; + } + /* Shouldn't be called when initdata is NULL, maybe BUG()? */ + return -EINVAL; +} + static struct dvb_tuner_ops dvb_pll_tuner_ops = { .release = dvb_pll_release, .sleep = dvb_pll_sleep, @@ -644,6 +681,8 @@ struct dvb_frontend *dvb_pll_attach(struct dvb_frontend *fe, int pll_addr, sizeof(fe->ops.tuner_ops.info.name)); fe->ops.tuner_ops.info.frequency_min = desc->min; fe->ops.tuner_ops.info.frequency_min = desc->max; + if (desc->initdata) + fe->ops.tuner_ops.init = dvb_pll_init; fe->tuner_priv = priv; return fe; |