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Commit d1141538 authored by Steven Toth's avatar Steven Toth Committed by Mauro Carvalho Chehab
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V4L/DVB (11697): tda10048: Add ability to select I/F at attach time. 

tda10048: Add ability to select I/F at attach time.
Signed-off-by: default avatarSteven Toth <stoth@linuxtv.org>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 17720e07
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Inline Side-by-side
Showing with 232 additions and 1 deletion
drivers/media/dvb/frontends/tda10048.c
View file @ d1141538
......@@ -25,6 +25,7 @@
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <asm/div64.h>
#include "dvb_frontend.h"
#include "dvb_math.h"
#include "tda10048.h"
......@@ -143,6 +144,15 @@ struct tda10048_state {
struct dvb_frontend frontend;
int fwloaded;
u32 freq_if_hz;
u32 xtal_hz;
u32 pll_mfactor;
u32 pll_nfactor;
u32 pll_pfactor;
u32 sample_freq;
enum fe_bandwidth bandwidth;
};
static struct init_tab {
......@@ -271,6 +281,199 @@ static int tda10048_writeregbulk(struct tda10048_state *state, u8 reg,
return ret;
}
static int tda10048_set_phy2(struct dvb_frontend *fe, u32 sample_freq_hz,
u32 if_hz)
{
struct tda10048_state *state = fe->demodulator_priv;
u64 t;
dprintk(1, "%s()\n", __func__);
if (sample_freq_hz == 0)
return -EINVAL;
if (if_hz < (sample_freq_hz / 2)) {
/* PHY2 = (if2/fs) * 2^15 */
t = if_hz;
t *= 10;
t *= 32768;
do_div(t, sample_freq_hz);
t += 5;
do_div(t, 10);
} else {
/* PHY2 = ((IF1-fs)/fs) * 2^15 */
t = sample_freq_hz - if_hz;
t *= 10;
t *= 32768;
do_div(t, sample_freq_hz);
t += 5;
do_div(t, 10);
t = ~t + 1;
}
tda10048_writereg(state, TDA10048_FREQ_PHY2_LSB, (u8)t);
tda10048_writereg(state, TDA10048_FREQ_PHY2_MSB, (u8)(t >> 8));
return 0;
}
static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz,
u32 bw)
{
struct tda10048_state *state = fe->demodulator_priv;
u64 t, z;
u32 b = 8000000;
dprintk(1, "%s()\n", __func__);
if (sample_freq_hz == 0)
return -EINVAL;
if (bw == BANDWIDTH_6_MHZ)
b = 6000000;
else
if (bw == BANDWIDTH_7_MHZ)
b = 7000000;
/* WREF = (B / (7 * fs)) * 2^31 */
t = b * 10;
/* avoid warning: this decimal constant is unsigned only in ISO C90 */
/* t *= 2147483648 on 32bit platforms */
t *= (2048 * 1024);
t *= 1024;
z = 7 * sample_freq_hz;
do_div(t, z);
t += 5;
do_div(t, 10);
tda10048_writereg(state, TDA10048_TIME_WREF_LSB, (u8)t);
tda10048_writereg(state, TDA10048_TIME_WREF_MID1, (u8)(t >> 8));
tda10048_writereg(state, TDA10048_TIME_WREF_MID2, (u8)(t >> 16));
tda10048_writereg(state, TDA10048_TIME_WREF_MSB, (u8)(t >> 24));
return 0;
}
static int tda10048_set_invwref(struct dvb_frontend *fe, u32 sample_freq_hz,
u32 bw)
{
struct tda10048_state *state = fe->demodulator_priv;
u64 t;
u32 b = 8000000;
dprintk(1, "%s()\n", __func__);
if (sample_freq_hz == 0)
return -EINVAL;
if (bw == BANDWIDTH_6_MHZ)
b = 6000000;
else
if (bw == BANDWIDTH_7_MHZ)
b = 7000000;
/* INVWREF = ((7 * fs) / B) * 2^5 */
t = sample_freq_hz;
t *= 7;
t *= 32;
t *= 10;
do_div(t, b);
t += 5;
do_div(t, 10);
tda10048_writereg(state, TDA10048_TIME_INVWREF_LSB, (u8)t);
tda10048_writereg(state, TDA10048_TIME_INVWREF_MSB, (u8)(t >> 8));
return 0;
}
static int tda10048_set_bandwidth(struct dvb_frontend *fe,
enum fe_bandwidth bw)
{
struct tda10048_state *state = fe->demodulator_priv;
dprintk(1, "%s(bw=%d)\n", __func__, bw);
/* Bandwidth setting may need to be adjusted */
switch (bw) {
case BANDWIDTH_6_MHZ:
case BANDWIDTH_7_MHZ:
case BANDWIDTH_8_MHZ:
tda10048_set_wref(fe, state->sample_freq, bw);
tda10048_set_invwref(fe, state->sample_freq, bw);
break;
default:
printk(KERN_ERR "%s() invalid bandwidth\n", __func__);
return -EINVAL;
}
state->bandwidth = bw;
return 0;
}
static int tda10048_set_pll(struct dvb_frontend *fe)
{
struct tda10048_state *state = fe->demodulator_priv;
int ret = 0;
dprintk(1, "%s()\n", __func__);
if ((state->config->clk_freq_khz == TDA10048_CLK_4000) &&
(state->config->if_freq_khz == TDA10048_IF_36130)) {
state->freq_if_hz = TDA10048_IF_36130 * 1000;
state->xtal_hz = TDA10048_CLK_4000 * 1000;
state->pll_mfactor = 10;
state->pll_nfactor = 0;
state->pll_pfactor = 0;
} else
if ((state->config->clk_freq_khz == TDA10048_CLK_16000) &&
(state->config->if_freq_khz == TDA10048_IF_4300)) {
state->freq_if_hz = TDA10048_IF_4300 * 1000;
state->xtal_hz = TDA10048_CLK_16000 * 1000;
state->pll_mfactor = 10;
state->pll_nfactor = 3;
state->pll_pfactor = 0;
} else
if ((state->config->clk_freq_khz == TDA10048_CLK_16000) &&
(state->config->if_freq_khz == TDA10048_IF_4000)) {
state->freq_if_hz = TDA10048_IF_4000 * 1000;
state->xtal_hz = TDA10048_CLK_16000 * 1000;
state->pll_mfactor = 10;
state->pll_nfactor = 3;
state->pll_pfactor = 0;
} else
if ((state->config->clk_freq_khz == TDA10048_CLK_16000) &&
(state->config->if_freq_khz == TDA10048_IF_36130)) {
state->freq_if_hz = TDA10048_IF_36130 * 1000;
state->xtal_hz = TDA10048_CLK_16000 * 1000;
state->pll_mfactor = 10;
state->pll_nfactor = 3;
state->pll_pfactor = 0;
} else {
printk(KERN_ERR "%s() Incorrect attach settings\n", __func__);
ret = -EINVAL;
}
dprintk(1, "- freq_if_hz = %d\n", state->freq_if_hz);
dprintk(1, "- xtal_hz = %d\n", state->xtal_hz);
dprintk(1, "- pll_mfactor = %d\n", state->pll_mfactor);
dprintk(1, "- pll_nfactor = %d\n", state->pll_nfactor);
dprintk(1, "- pll_pfactor = %d\n", state->pll_pfactor);
/* Calculate the sample frequency */
state->sample_freq = state->xtal_hz * (state->pll_mfactor + 45);
state->sample_freq /= (state->pll_nfactor + 1);
state->sample_freq /= (state->pll_pfactor + 4);
dprintk(1, "- sample_freq = %d\n", state->sample_freq);
tda10048_set_phy2(fe, state->sample_freq,
state->config->if_freq_khz * 1000);
tda10048_set_wref(fe, state->sample_freq, state->bandwidth);
tda10048_set_invwref(fe, state->sample_freq, state->bandwidth);
return ret;
}
static int tda10048_firmware_upload(struct dvb_frontend *fe)
{
struct tda10048_state *state = fe->demodulator_priv;
......@@ -523,6 +726,9 @@ static int tda10048_set_frontend(struct dvb_frontend *fe,
dprintk(1, "%s(frequency=%d)\n", __func__, p->frequency);
if (p->u.ofdm.bandwidth != state->bandwidth)
tda10048_set_bandwidth(fe, p->u.ofdm.bandwidth);
if (fe->ops.tuner_ops.set_params) {
if (fe->ops.i2c_gate_ctrl)
......@@ -558,9 +764,15 @@ static int tda10048_init(struct dvb_frontend *fe)
/* Set either serial or parallel */
tda10048_output_mode(fe, state->config->output_mode);
/* set inversion */
/* Set inversion */
tda10048_set_inversion(fe, state->config->inversion);
/* Establish default PLL values */
tda10048_set_pll(fe);
/* Establish default bandwidth */
tda10048_set_bandwidth(fe, BANDWIDTH_8_MHZ);
/* Ensure we leave the gate closed */
tda10048_i2c_gate_ctrl(fe, 0);
......@@ -830,6 +1042,7 @@ struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
state->config = config;
state->i2c = i2c;
state->fwloaded = 0;
state->bandwidth = BANDWIDTH_8_MHZ;
/* check if the demod is present */
if (tda10048_readreg(state, TDA10048_IDENTITY) != 0x048)
......@@ -840,6 +1053,10 @@ struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
/* Set the xtal and freq defaults */
if (tda10048_set_pll(&state->frontend) != 0)
goto error;
/* Leave the gate closed */
tda10048_i2c_gate_ctrl(&state->frontend, 0);
......
drivers/media/dvb/frontends/tda10048.h
View file @ d1141538
......@@ -43,6 +43,20 @@ struct tda10048_config {
#define TDA10048_INVERSION_OFF 0
#define TDA10048_INVERSION_ON 1
u8 inversion;
#define TDA10048_IF_3300 3300
#define TDA10048_IF_3500 3500
#define TDA10048_IF_3800 3800
#define TDA10048_IF_4000 4000
#define TDA10048_IF_4300 4300
#define TDA10048_IF_4500 4500
#define TDA10048_IF_4750 4750
#define TDA10048_IF_36130 36130
u16 if_freq_khz;
#define TDA10048_CLK_4000 4000
#define TDA10048_CLK_16000 16000
u16 clk_freq_khz;
};
#if defined(CONFIG_DVB_TDA10048) || \
......
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