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[media] mn88473: calculate the IF register values

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Add xtal as a configuration parameter so it can be used
in the IF register value calculation. If not set in the
configuration then use a default value.

Signed-off-by: Benjamin Larsson <benjamin@southpole.se>
Reviewed-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Benjamin Larsson 2015-01-12 20:23:25 -03:00 committed by Mauro Carvalho Chehab
parent 269bd1324f
commit 3b786f1316
3 changed files with 18 additions and 15 deletions
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6
drivers/media/dvb-frontends/mn88473.h
View File

@ -33,6 +33,12 @@ struct mn88473_config {
* DVB frontend.
*/
struct dvb_frontend **fe;
/*
* Xtal frequency.
* Hz
*/
u32 xtal;
};
#endif

26
drivers/staging/media/mn88473/mn88473.c
View File

@ -30,6 +30,7 @@ static int mn88473_set_frontend(struct dvb_frontend *fe)
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret, i;
u32 if_frequency;
u64 tmp;
u8 delivery_system_val, if_val[3], bw_val[7];
dev_dbg(&client->dev,
@ -63,15 +64,12 @@ static int mn88473_set_frontend(struct dvb_frontend *fe)
case SYS_DVBT2:
if (c->bandwidth_hz <= 6000000) {
/* IF 3570000 Hz, BW 6000000 Hz */
memcpy(if_val, "\x24\x8e\x8a", 3);
memcpy(bw_val, "\xe9\x55\x55\x1c\x29\x1c\x29", 7);
} else if (c->bandwidth_hz <= 7000000) {
/* IF 4570000 Hz, BW 7000000 Hz */
memcpy(if_val, "\x2e\xcb\xfb", 3);
memcpy(bw_val, "\xc8\x00\x00\x17\x0a\x17\x0a", 7);
} else if (c->bandwidth_hz <= 8000000) {
/* IF 4570000 Hz, BW 8000000 Hz */
memcpy(if_val, "\x2e\xcb\xfb", 3);
memcpy(bw_val, "\xaf\x00\x00\x11\xec\x11\xec", 7);
} else {
ret = -EINVAL;
@ -80,7 +78,6 @@ static int mn88473_set_frontend(struct dvb_frontend *fe)
break;
case SYS_DVBC_ANNEX_A:
/* IF 5070000 Hz, BW 8000000 Hz */
memcpy(if_val, "\x33\xea\xb3", 3);
memcpy(bw_val, "\xaf\x00\x00\x11\xec\x11\xec", 7);
break;
default:
@ -105,17 +102,12 @@ static int mn88473_set_frontend(struct dvb_frontend *fe)
if_frequency = 0;
}
switch (if_frequency) {
case 3570000:
case 4570000:
case 5070000:
break;
default:
dev_err(&client->dev, "IF frequency %d not supported\n",
if_frequency);
ret = -EINVAL;
goto err;
}
/* Calculate IF registers ( (1<<24)*IF / Xtal ) */
tmp = div_u64(if_frequency * (u64)(1<<24) + (dev->xtal / 2),
dev->xtal);
if_val[0] = ((tmp >> 16) & 0xff);
if_val[1] = ((tmp >> 8) & 0xff);
if_val[2] = ((tmp >> 0) & 0xff);
ret = regmap_write(dev->regmap[2], 0x05, 0x00);
ret = regmap_write(dev->regmap[2], 0xfb, 0x13);
@ -352,6 +344,10 @@ static int mn88473_probe(struct i2c_client *client,
}
dev->i2c_wr_max = config->i2c_wr_max;
if (!config->xtal)
dev->xtal = 25000000;
else
dev->xtal = config->xtal;
dev->client[0] = client;
dev->regmap[0] = regmap_init_i2c(dev->client[0], &regmap_config);
if (IS_ERR(dev->regmap[0])) {

1
drivers/staging/media/mn88473/mn88473_priv.h
View File

@ -31,6 +31,7 @@ struct mn88473_dev {
u16 i2c_wr_max;
fe_delivery_system_t delivery_system;
bool warm; /* FW running */
u32 xtal;
};
#endif