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V4L/DVB (8598): au8522: clean up function au8522_set_if

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re-write this function to make it simpler

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Michael Krufky 2008-09-03 16:46:40 -03:00 committed by Mauro Carvalho Chehab
parent 8e8bd229ee
commit df76de098d
1 changed files with 19 additions and 46 deletions
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65
drivers/media/dvb/frontends/au8522.c
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@ -304,67 +304,40 @@ static int au8522_mse2snr_lookup(struct mse2snr_tab *tab, int sz, int mse,
return ret;
}
/* 3.25 MHz IF Frequency table */
static struct {
u16 reg;
u16 data;
} if_3_25_mhz_tab[] = {
{ 0x80b5, 0x00 },
{ 0x80b6, 0x3d },
{ 0x80b7, 0xa0 },
};
/* 4.00 MHz IF Frequency table */
static struct {
u16 reg;
u16 data;
} if_4_mhz_tab[] = {
{ 0x80b5, 0x00 },
{ 0x80b6, 0x4b },
{ 0x80b7, 0xd9 },
};
/* 6.00 MHz IF Frequency table */
static struct {
u16 reg;
u16 data;
} if_6_mhz_tab[] = {
{ 0x80b5, 0xfb },
{ 0x80b6, 0x8e },
{ 0x80b7, 0x39 },
};
static int au8522_set_if(struct dvb_frontend *fe, enum au8522_if_freq if_freq)
{
struct au8522_state *state = fe->demodulator_priv;
int i;
u8 r0b5, r0b6, r0b7;
char *ifmhz;
switch (if_freq) {
case AU8522_IF_3_25MHZ:
dprintk("%s() 3.25 MHz\n", __func__);
for (i = 0; i < ARRAY_SIZE(if_3_25_mhz_tab); i++)
au8522_writereg(state,
if_3_25_mhz_tab[i].reg,
if_3_25_mhz_tab[i].data);
ifmhz = "3.25";
r0b5 = 0x00;
r0b6 = 0x3d;
r0b7 = 0xa0;
break;
case AU8522_IF_4MHZ:
dprintk("%s() 4.00 MHz\n", __func__);
for (i = 0; i < ARRAY_SIZE(if_4_mhz_tab); i++)
au8522_writereg(state,
if_4_mhz_tab[i].reg,
if_4_mhz_tab[i].data);
ifmhz = "4.00";
r0b5 = 0x00;
r0b6 = 0x4b;
r0b7 = 0xd9;
break;
case AU8522_IF_6MHZ:
dprintk("%s() 6.00 MHz\n", __func__);
for (i = 0; i < ARRAY_SIZE(if_6_mhz_tab); i++)
au8522_writereg(state,
if_6_mhz_tab[i].reg,
if_6_mhz_tab[i].data);
ifmhz = "6.00";
r0b5 = 0xfb;
r0b6 = 0x8e;
r0b7 = 0x39;
break;
default:
dprintk("%s() IF Frequency not supported\n", __func__);
return -EINVAL;
}
dprintk("%s() %s MHz\n", __func__, ifmhz);
au8522_writereg(state, 0x80b5, r0b5);
au8522_writereg(state, 0x80b6, r0b6);
au8522_writereg(state, 0x80b7, r0b7);
return 0;
}