diff options
| -rw-r--r-- | drivers/media/dvb/frontends/tda18271-fe.c | 99 |
1 files changed, 56 insertions, 43 deletions
diff --git a/drivers/media/dvb/frontends/tda18271-fe.c b/drivers/media/dvb/frontends/tda18271-fe.c index 4c105853d93..19c9be92de5 100644 --- a/drivers/media/dvb/frontends/tda18271-fe.c +++ b/drivers/media/dvb/frontends/tda18271-fe.c @@ -371,13 +371,64 @@ static int tda18271_init(struct dvb_frontend *fe) return 0; } +static int tda18271_calc_main_pll(struct dvb_frontend *fe, u32 freq) +{ + /* Sets Main Post-Divider & Divider bytes, but does not write them */ + struct tda18271_priv *priv = fe->tuner_priv; + unsigned char *regs = priv->tda18271_regs; + u8 d, pd; + u32 div; + + tda18271_lookup_main_pll(&freq, &pd, &d); + + regs[R_MPD] = (0x77 & pd); + + switch (priv->mode) { + case TDA18271_ANALOG: + regs[R_MPD] &= ~0x08; + break; + case TDA18271_DIGITAL: + regs[R_MPD] |= 0x08; + break; + } + + div = ((d * (freq / 1000)) << 7) / 125; + + regs[R_MD1] = 0x7f & (div >> 16); + regs[R_MD2] = 0xff & (div >> 8); + regs[R_MD3] = 0xff & div; + + return 0; +} + +static int tda18271_calc_cal_pll(struct dvb_frontend *fe, u32 freq) +{ + /* Sets Cal Post-Divider & Divider bytes, but does not write them */ + struct tda18271_priv *priv = fe->tuner_priv; + unsigned char *regs = priv->tda18271_regs; + u8 d, pd; + u32 div; + + tda18271_lookup_cal_pll(&freq, &pd, &d); + + regs[R_CPD] = pd; + + div = ((d * (freq / 1000)) << 7) / 125; + + regs[R_CD1] = 0x7f & (div >> 16); + regs[R_CD2] = 0xff & (div >> 8); + regs[R_CD3] = 0xff & div; + + return 0; +} + static int tda18271_tune(struct dvb_frontend *fe, u32 ifc, u32 freq, u32 bw, u8 std) { struct tda18271_priv *priv = fe->tuner_priv; unsigned char *regs = priv->tda18271_regs; - u32 div, N = 0; - u8 d, pd, val; + u32 N = 0; + u8 val; tda18271_init(fe); @@ -419,14 +470,7 @@ static int tda18271_tune(struct dvb_frontend *fe, break; } - tda18271_lookup_cal_pll(&N, &pd, &d); - - regs[R_CPD] = pd; - - div = ((d * (N / 1000)) << 7) / 125; - regs[R_CD1] = 0x7f & (div >> 16); - regs[R_CD2] = 0xff & (div >> 8); - regs[R_CD3] = 0xff & div; + tda18271_calc_cal_pll(fe, N); /* calculate MAIN PLL */ @@ -439,23 +483,7 @@ static int tda18271_tune(struct dvb_frontend *fe, break; } - tda18271_lookup_main_pll(&N, &pd, &d); - - regs[R_MPD] = (0x7f & pd); - - switch (priv->mode) { - case TDA18271_ANALOG: - regs[R_MPD] &= ~0x08; - break; - case TDA18271_DIGITAL: - regs[R_MPD] |= 0x08; - break; - } - - div = ((d * (N / 1000)) << 7) / 125; - regs[R_MD1] = 0x7f & (div >> 16); - regs[R_MD2] = 0xff & (div >> 8); - regs[R_MD3] = 0xff & div; + tda18271_calc_main_pll(fe, N); tda18271_write_regs(fe, R_EP3, 11); msleep(5); /* RF tracking filter calibration initialization */ @@ -554,22 +582,7 @@ static int tda18271_tune(struct dvb_frontend *fe, /* calculate MAIN PLL */ N = freq + ifc; - tda18271_lookup_main_pll(&N, &pd, &d); - - regs[R_MPD] = (0x7f & pd); - switch (priv->mode) { - case TDA18271_ANALOG: - regs[R_MPD] &= ~0x08; - break; - case TDA18271_DIGITAL: - regs[R_MPD] |= 0x08; - break; - } - - div = ((d * (N / 1000)) << 7) / 125; - regs[R_MD1] = 0x7f & (div >> 16); - regs[R_MD2] = 0xff & (div >> 8); - regs[R_MD3] = 0xff & div; + tda18271_calc_main_pll(fe, N); tda18271_write_regs(fe, R_TM, 15); msleep(5); |