diff options
Diffstat (limited to 'drivers/media/dvb/frontends')
| -rw-r--r-- | drivers/media/dvb/frontends/s5h1409.c | 96 |
1 files changed, 86 insertions, 10 deletions
diff --git a/drivers/media/dvb/frontends/s5h1409.c b/drivers/media/dvb/frontends/s5h1409.c index 30e8a705fad..8dee7ec9456 100644 --- a/drivers/media/dvb/frontends/s5h1409.c +++ b/drivers/media/dvb/frontends/s5h1409.c @@ -42,6 +42,9 @@ struct s5h1409_state { fe_modulation_t current_modulation; u32 current_frequency; + + u32 is_qam_locked; + u32 qam_state; }; static int debug = 0; @@ -94,6 +97,7 @@ static struct init_tab { { 0xac, 0x1003, }, { 0xad, 0x103f, }, { 0xe2, 0x0100, }, + { 0xe3, 0x0000, }, { 0x28, 0x1010, }, { 0xb1, 0x000e, }, }; @@ -335,6 +339,8 @@ static int s5h1409_softreset(struct dvb_frontend* fe) s5h1409_writereg(state, 0xf5, 0); s5h1409_writereg(state, 0xf5, 1); + state->is_qam_locked = 0; + state->qam_state = 0; return 0; } @@ -349,6 +355,11 @@ static int s5h1409_set_if_freq(struct dvb_frontend* fe, int KHz) s5h1409_writereg(state, 0x87, 0x01be); s5h1409_writereg(state, 0x88, 0x0436); s5h1409_writereg(state, 0x89, 0x054d); + } else + if (KHz == 4000) { + s5h1409_writereg(state, 0x87, 0x014b); + s5h1409_writereg(state, 0x88, 0x0cb5); + s5h1409_writereg(state, 0x89, 0x03e2); } else { printk("%s() Invalid arg = %d KHz\n", __FUNCTION__, KHz); ret = -1; @@ -361,7 +372,7 @@ static int s5h1409_set_spectralinversion(struct dvb_frontend* fe, int inverted) { struct s5h1409_state* state = fe->demodulator_priv; - dprintk("%s()\n", __FUNCTION__); + dprintk("%s(%d)\n", __FUNCTION__, inverted); if(inverted == 1) return s5h1409_writereg(state, 0x1b, 0x1101); /* Inverted */ @@ -382,14 +393,10 @@ static int s5h1409_enable_modulation(struct dvb_frontend* fe, s5h1409_writereg(state, 0xf4, 0); break; case QAM_64: - dprintk("%s() QAM_64\n", __FUNCTION__); - s5h1409_writereg(state, 0xf4, 1); - s5h1409_writereg(state, 0x85, 0x100); - break; case QAM_256: - dprintk("%s() QAM_256\n", __FUNCTION__); + dprintk("%s() QAM_AUTO (64/256)\n", __FUNCTION__); s5h1409_writereg(state, 0xf4, 1); - s5h1409_writereg(state, 0x85, 0x101); + s5h1409_writereg(state, 0x85, 0x110); break; default: dprintk("%s() Invalid modulation\n", __FUNCTION__); @@ -423,7 +430,7 @@ static int s5h1409_set_gpio(struct dvb_frontend* fe, int enable) if (enable) return s5h1409_writereg(state, 0xe3, 0x1100); else - return s5h1409_writereg(state, 0xe3, 0); + return s5h1409_writereg(state, 0xe3, 0x1000); } static int s5h1409_sleep(struct dvb_frontend* fe, int enable) @@ -444,6 +451,66 @@ static int s5h1409_register_reset(struct dvb_frontend* fe) return s5h1409_writereg(state, 0xfa, 0); } +static void s5h1409_set_qam_amhum_mode(struct dvb_frontend *fe) +{ + struct s5h1409_state *state = fe->demodulator_priv; + u16 reg; + + if (state->is_qam_locked) + return; + + /* QAM EQ lock check */ + reg = s5h1409_readreg(state, 0xf0); + + if ((reg >> 13) & 0x1) { + + state->is_qam_locked = 1; + reg &= 0xff; + + s5h1409_writereg(state, 0x96, 0x00c); + if ((reg < 0x38) || (reg > 0x68) ) { + s5h1409_writereg(state, 0x93, 0x3332); + s5h1409_writereg(state, 0x9e, 0x2c37); + } else { + s5h1409_writereg(state, 0x93, 0x3130); + s5h1409_writereg(state, 0x9e, 0x2836); + } + + } else { + s5h1409_writereg(state, 0x96, 0x0008); + s5h1409_writereg(state, 0x93, 0x3332); + s5h1409_writereg(state, 0x9e, 0x2c37); + } +} + +static void s5h1409_set_qam_interleave_mode(struct dvb_frontend *fe) +{ + struct s5h1409_state *state = fe->demodulator_priv; + u16 reg, reg1, reg2; + + reg = s5h1409_readreg(state, 0xf1); + + /* Master lock */ + if ((reg >> 15) & 0x1) { + if (state->qam_state != 2) { + state->qam_state = 2; + reg1 = s5h1409_readreg(state, 0xb2); + reg2 = s5h1409_readreg(state, 0xad); + + s5h1409_writereg(state, 0x96, 0x20); + s5h1409_writereg(state, 0xad, + ( ((reg1 & 0xf000) >> 4) | (reg2 & 0xf0ff)) ); + s5h1409_writereg(state, 0xab, 0x1100); + } + } else { + if (state->qam_state != 1) { + state->qam_state = 1; + s5h1409_writereg(state, 0x96, 0x08); + s5h1409_writereg(state, 0xab, 0x1101); + } + } +} + /* Talk to the demod, set the FEC, GUARD, QAM settings etc */ static int s5h1409_set_frontend (struct dvb_frontend* fe, struct dvb_frontend_parameters *p) @@ -458,12 +525,21 @@ static int s5h1409_set_frontend (struct dvb_frontend* fe, s5h1409_enable_modulation(fe, p->u.vsb.modulation); + /* Allow the demod to settle */ + msleep(100); + if (fe->ops.tuner_ops.set_params) { if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 1); fe->ops.tuner_ops.set_params(fe, p); if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); } + /* Optimize the demod for QAM */ + if (p->u.vsb.modulation != VSB_8) { + s5h1409_set_qam_amhum_mode(fe); + s5h1409_set_qam_interleave_mode(fe); + } + return 0; } @@ -495,8 +571,8 @@ static int s5h1409_init (struct dvb_frontend* fe) s5h1409_set_gpio(fe, state->config->gpio); s5h1409_softreset(fe); - /* Note: Leaving the I2C gate open here. */ - s5h1409_i2c_gate_ctrl(fe, 1); + /* Note: Leaving the I2C gate closed. */ + s5h1409_i2c_gate_ctrl(fe, 0); return 0; } |