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V4L/DVB (6907): tda18271: create separate calc_pll functions

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Consolidate duplicated code by creating functions:

tda18271_calc_main_pll
tda18271_calc_cal_pll

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2007-12-24 05:05:05 -03:00 committed by Mauro Carvalho Chehab
parent f0bd504fb9
commit fe0bf6d783
1 changed files with 56 additions and 43 deletions
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99
drivers/media/dvb/frontends/tda18271-fe.c
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@ -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);