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[media] mb86a20s: adjust IF based on what's set on the tuner

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Instead of hardcoding a fixed IF frequency of 3.3 MHz, use
the IF frequency provided by the tuner driver.

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab 2013-02-28 16:45:39 -03:00
parent d56e326f7b
commit 768e6dadd7
1 changed files with 53 additions and 4 deletions
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57
drivers/media/dvb-frontends/mb86a20s.c
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@ -31,6 +31,8 @@ struct mb86a20s_state {
struct dvb_frontend frontend;
u32 if_freq;
u32 estimated_rate[3];
bool need_init;
@ -47,7 +49,7 @@ struct regdata {
* Initialization sequence: Use whatevere default values that PV SBTVD
* does on its initialisation, obtained via USB snoop
*/
static struct regdata mb86a20s_init[] = {
static struct regdata mb86a20s_init1[] = {
{ 0x70, 0x0f },
{ 0x70, 0xff },
{ 0x08, 0x01 },
@ -56,7 +58,9 @@ static struct regdata mb86a20s_init[] = {
{ 0x39, 0x01 },
{ 0x71, 0x00 },
{ 0x28, 0x2a }, { 0x29, 0x00 }, { 0x2a, 0xff }, { 0x2b, 0x80 },
{ 0x28, 0x20 }, { 0x29, 0x33 }, { 0x2a, 0xdf }, { 0x2b, 0xa9 },
};
static struct regdata mb86a20s_init2[] = {
{ 0x28, 0x22 }, { 0x29, 0x00 }, { 0x2a, 0x1f }, { 0x2b, 0xf0 },
{ 0x3b, 0x21 },
{ 0x3c, 0x3a },
@ -1737,6 +1741,7 @@ static int mb86a20s_get_stats(struct dvb_frontend *fe)
static int mb86a20s_initfe(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
u64 pll;
int rc;
u8 regD5 = 1;
@ -1746,10 +1751,35 @@ static int mb86a20s_initfe(struct dvb_frontend *fe)
fe->ops.i2c_gate_ctrl(fe, 0);
/* Initialize the frontend */
rc = mb86a20s_writeregdata(state, mb86a20s_init);
rc = mb86a20s_writeregdata(state, mb86a20s_init1);
if (rc < 0)
goto err;
/* Adjust IF frequency to match tuner */
if (fe->ops.tuner_ops.get_if_frequency)
fe->ops.tuner_ops.get_if_frequency(fe, &state->if_freq);
if (!state->if_freq)
state->if_freq = 3300000;
/* pll = freq[Hz] * 2^24/10^6 / 16.285714286 */
pll = state->if_freq * 1677721600L;
do_div(pll, 1628571429L);
rc = mb86a20s_writereg(state, 0x28, 0x20);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x29, (pll >> 16) & 0xff);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x2a, (pll >> 8) & 0xff);
if (rc < 0)
goto err;
rc = mb86a20s_writereg(state, 0x2b, pll & 0xff);
if (rc < 0)
goto err;
dev_dbg(&state->i2c->dev, "%s: IF=%d, PLL=0x%06llx\n",
__func__, state->if_freq, (long long)pll);
if (!state->config->is_serial) {
regD5 &= ~1;
@ -1761,6 +1791,11 @@ static int mb86a20s_initfe(struct dvb_frontend *fe)
goto err;
}
rc = mb86a20s_writeregdata(state, mb86a20s_init2);
if (rc < 0)
goto err;
err:
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
@ -1779,7 +1814,7 @@ err:
static int mb86a20s_set_frontend(struct dvb_frontend *fe)
{
struct mb86a20s_state *state = fe->demodulator_priv;
int rc;
int rc, if_freq;
#if 0
/*
* FIXME: Properly implement the set frontend properties
@ -1796,6 +1831,18 @@ static int mb86a20s_set_frontend(struct dvb_frontend *fe)
fe->ops.i2c_gate_ctrl(fe, 1);
fe->ops.tuner_ops.set_params(fe);
if (fe->ops.tuner_ops.get_if_frequency) {
fe->ops.tuner_ops.get_if_frequency(fe, &if_freq);
/*
* If the IF frequency changed, re-initialize the
* frontend. This is needed by some drivers like tda18271,
* that only sets the IF after receiving a set_params() call
*/
if (if_freq != state->if_freq)
state->need_init = true;
}
/*
* Make it more reliable: if, for some reason, the initial
* device initialization doesn't happen, initialize it when
@ -1805,6 +1852,8 @@ static int mb86a20s_set_frontend(struct dvb_frontend *fe)
* the agc callback logic is not called during DVB attach time,
* causing mb86a20s to not be initialized with Kworld SBTVD.
* So, this hack is needed, in order to make Kworld SBTVD to work.
*
* It is also needed to change the IF after the initial init.
*/
if (state->need_init)
mb86a20s_initfe(fe);