353 lines
8.5 KiB
C
353 lines
8.5 KiB
C
|
/*
|
||
|
|
* NXP TDA18218HN silicon tuner driver
|
||
|
|
*
|
||
|
|
* Copyright (C) 2010 Antti Palosaari <crope@iki.fi>
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "tda18218_priv.h"
|
||
|
|
|
||
|
|
/* Max transfer size done by I2C transfer functions */
|
||
|
|
#define MAX_XFER_SIZE 64
|
||
|
|
|
||
|
|
/* write multiple registers */
|
||
|
|
static int tda18218_wr_regs(struct tda18218_priv *priv, u8 reg, u8 *val, u8 len)
|
||
|
|
{
|
||
|
|
int ret = 0, len2, remaining;
|
||
|
|
u8 buf[MAX_XFER_SIZE];
|
||
|
|
struct i2c_msg msg[1] = {
|
||
|
|
{
|
||
|
|
.addr = priv->cfg->i2c_address,
|
||
|
|
.flags = 0,
|
||
|
|
.buf = buf,
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
if (1 + len > sizeof(buf)) {
|
||
|
|
dev_warn(&priv->i2c->dev,
|
||
|
|
"%s: i2c wr reg=%04x: len=%d is too big!\n",
|
||
|
|
KBUILD_MODNAME, reg, len);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (remaining = len; remaining > 0;
|
||
|
|
remaining -= (priv->cfg->i2c_wr_max - 1)) {
|
||
|
|
len2 = remaining;
|
||
|
|
if (len2 > (priv->cfg->i2c_wr_max - 1))
|
||
|
|
len2 = (priv->cfg->i2c_wr_max - 1);
|
||
|
|
|
||
|
|
msg[0].len = 1 + len2;
|
||
|
|
buf[0] = reg + len - remaining;
|
||
|
|
memcpy(&buf[1], &val[len - remaining], len2);
|
||
|
|
|
||
|
|
ret = i2c_transfer(priv->i2c, msg, 1);
|
||
|
|
if (ret != 1)
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (ret == 1) {
|
||
|
|
ret = 0;
|
||
|
|
} else {
|
||
|
|
dev_warn(&priv->i2c->dev, "%s: i2c wr failed=%d reg=%02x " \
|
||
|
|
"len=%d\n", KBUILD_MODNAME, ret, reg, len);
|
||
|
|
ret = -EREMOTEIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* read multiple registers */
|
||
|
|
static int tda18218_rd_regs(struct tda18218_priv *priv, u8 reg, u8 *val, u8 len)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
u8 buf[MAX_XFER_SIZE]; /* we must start read always from reg 0x00 */
|
||
|
|
struct i2c_msg msg[2] = {
|
||
|
|
{
|
||
|
|
.addr = priv->cfg->i2c_address,
|
||
|
|
.flags = 0,
|
||
|
|
.len = 1,
|
||
|
|
.buf = "\x00",
|
||
|
|
}, {
|
||
|
|
.addr = priv->cfg->i2c_address,
|
||
|
|
.flags = I2C_M_RD,
|
||
|
|
.len = reg + len,
|
||
|
|
.buf = buf,
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
if (reg + len > sizeof(buf)) {
|
||
|
|
dev_warn(&priv->i2c->dev,
|
||
|
|
"%s: i2c wr reg=%04x: len=%d is too big!\n",
|
||
|
|
KBUILD_MODNAME, reg, len);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = i2c_transfer(priv->i2c, msg, 2);
|
||
|
|
if (ret == 2) {
|
||
|
|
memcpy(val, &buf[reg], len);
|
||
|
|
ret = 0;
|
||
|
|
} else {
|
||
|
|
dev_warn(&priv->i2c->dev, "%s: i2c rd failed=%d reg=%02x " \
|
||
|
|
"len=%d\n", KBUILD_MODNAME, ret, reg, len);
|
||
|
|
ret = -EREMOTEIO;
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* write single register */
|
||
|
|
static int tda18218_wr_reg(struct tda18218_priv *priv, u8 reg, u8 val)
|
||
|
|
{
|
||
|
|
return tda18218_wr_regs(priv, reg, &val, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* read single register */
|
||
|
|
|
||
|
|
static int tda18218_rd_reg(struct tda18218_priv *priv, u8 reg, u8 *val)
|
||
|
|
{
|
||
|
|
return tda18218_rd_regs(priv, reg, val, 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int tda18218_set_params(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct tda18218_priv *priv = fe->tuner_priv;
|
||
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
||
|
|
u32 bw = c->bandwidth_hz;
|
||
|
|
int ret;
|
||
|
|
u8 buf[3], i, BP_Filter, LP_Fc;
|
||
|
|
u32 LO_Frac;
|
||
|
|
/* TODO: find out correct AGC algorithm */
|
||
|
|
u8 agc[][2] = {
|
||
|
|
{ R20_AGC11, 0x60 },
|
||
|
|
{ R23_AGC21, 0x02 },
|
||
|
|
{ R20_AGC11, 0xa0 },
|
||
|
|
{ R23_AGC21, 0x09 },
|
||
|
|
{ R20_AGC11, 0xe0 },
|
||
|
|
{ R23_AGC21, 0x0c },
|
||
|
|
{ R20_AGC11, 0x40 },
|
||
|
|
{ R23_AGC21, 0x01 },
|
||
|
|
{ R20_AGC11, 0x80 },
|
||
|
|
{ R23_AGC21, 0x08 },
|
||
|
|
{ R20_AGC11, 0xc0 },
|
||
|
|
{ R23_AGC21, 0x0b },
|
||
|
|
{ R24_AGC22, 0x1c },
|
||
|
|
{ R24_AGC22, 0x0c },
|
||
|
|
};
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
|
||
|
|
|
||
|
|
/* low-pass filter cut-off frequency */
|
||
|
|
if (bw <= 6000000) {
|
||
|
|
LP_Fc = 0;
|
||
|
|
priv->if_frequency = 3000000;
|
||
|
|
} else if (bw <= 7000000) {
|
||
|
|
LP_Fc = 1;
|
||
|
|
priv->if_frequency = 3500000;
|
||
|
|
} else {
|
||
|
|
LP_Fc = 2;
|
||
|
|
priv->if_frequency = 4000000;
|
||
|
|
}
|
||
|
|
|
||
|
|
LO_Frac = c->frequency + priv->if_frequency;
|
||
|
|
|
||
|
|
/* band-pass filter */
|
||
|
|
if (LO_Frac < 188000000)
|
||
|
|
BP_Filter = 3;
|
||
|
|
else if (LO_Frac < 253000000)
|
||
|
|
BP_Filter = 4;
|
||
|
|
else if (LO_Frac < 343000000)
|
||
|
|
BP_Filter = 5;
|
||
|
|
else
|
||
|
|
BP_Filter = 6;
|
||
|
|
|
||
|
|
buf[0] = (priv->regs[R1A_IF1] & ~7) | BP_Filter; /* BP_Filter */
|
||
|
|
buf[1] = (priv->regs[R1B_IF2] & ~3) | LP_Fc; /* LP_Fc */
|
||
|
|
buf[2] = priv->regs[R1C_AGC2B];
|
||
|
|
ret = tda18218_wr_regs(priv, R1A_IF1, buf, 3);
|
||
|
|
if (ret)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
buf[0] = (LO_Frac / 1000) >> 12; /* LO_Frac_0 */
|
||
|
|
buf[1] = (LO_Frac / 1000) >> 4; /* LO_Frac_1 */
|
||
|
|
buf[2] = (LO_Frac / 1000) << 4 |
|
||
|
|
(priv->regs[R0C_MD5] & 0x0f); /* LO_Frac_2 */
|
||
|
|
ret = tda18218_wr_regs(priv, R0A_MD3, buf, 3);
|
||
|
|
if (ret)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
buf[0] = priv->regs[R0F_MD8] | (1 << 6); /* Freq_prog_Start */
|
||
|
|
ret = tda18218_wr_regs(priv, R0F_MD8, buf, 1);
|
||
|
|
if (ret)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
buf[0] = priv->regs[R0F_MD8] & ~(1 << 6); /* Freq_prog_Start */
|
||
|
|
ret = tda18218_wr_regs(priv, R0F_MD8, buf, 1);
|
||
|
|
if (ret)
|
||
|
|
goto error;
|
||
|
|
|
||
|
|
/* trigger AGC */
|
||
|
|
for (i = 0; i < ARRAY_SIZE(agc); i++) {
|
||
|
|
ret = tda18218_wr_reg(priv, agc[i][0], agc[i][1]);
|
||
|
|
if (ret)
|
||
|
|
goto error;
|
||
|
|
}
|
||
|
|
|
||
|
|
error:
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
|
||
|
|
|
||
|
|
if (ret)
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int tda18218_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
|
||
|
|
{
|
||
|
|
struct tda18218_priv *priv = fe->tuner_priv;
|
||
|
|
*frequency = priv->if_frequency;
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: if_frequency=%d\n", __func__, *frequency);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int tda18218_sleep(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct tda18218_priv *priv = fe->tuner_priv;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
|
||
|
|
|
||
|
|
/* standby */
|
||
|
|
ret = tda18218_wr_reg(priv, R17_PD1, priv->regs[R17_PD1] | (1 << 0));
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
|
||
|
|
|
||
|
|
if (ret)
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int tda18218_init(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
struct tda18218_priv *priv = fe->tuner_priv;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* TODO: calibrations */
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
|
||
|
|
|
||
|
|
ret = tda18218_wr_regs(priv, R00_ID, priv->regs, TDA18218_NUM_REGS);
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
|
||
|
|
|
||
|
|
if (ret)
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void tda18218_release(struct dvb_frontend *fe)
|
||
|
|
{
|
||
|
|
kfree(fe->tuner_priv);
|
||
|
|
fe->tuner_priv = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dvb_tuner_ops tda18218_tuner_ops = {
|
||
|
|
.info = {
|
||
|
|
.name = "NXP TDA18218",
|
||
|
|
|
||
|
|
.frequency_min = 174000000,
|
||
|
|
.frequency_max = 864000000,
|
||
|
|
.frequency_step = 1000,
|
||
|
|
},
|
||
|
|
|
||
|
|
.release = tda18218_release,
|
||
|
|
.init = tda18218_init,
|
||
|
|
.sleep = tda18218_sleep,
|
||
|
|
|
||
|
|
.set_params = tda18218_set_params,
|
||
|
|
|
||
|
|
.get_if_frequency = tda18218_get_if_frequency,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct dvb_frontend *tda18218_attach(struct dvb_frontend *fe,
|
||
|
|
struct i2c_adapter *i2c, struct tda18218_config *cfg)
|
||
|
|
{
|
||
|
|
struct tda18218_priv *priv = NULL;
|
||
|
|
u8 val;
|
||
|
|
int ret;
|
||
|
|
/* chip default registers values */
|
||
|
|
static u8 def_regs[] = {
|
||
|
|
0xc0, 0x88, 0x00, 0x8e, 0x03, 0x00, 0x00, 0xd0, 0x00, 0x40,
|
||
|
|
0x00, 0x00, 0x07, 0xff, 0x84, 0x09, 0x00, 0x13, 0x00, 0x00,
|
||
|
|
0x01, 0x84, 0x09, 0xf0, 0x19, 0x0a, 0x8e, 0x69, 0x98, 0x01,
|
||
|
|
0x00, 0x58, 0x10, 0x40, 0x8c, 0x00, 0x0c, 0x48, 0x85, 0xc9,
|
||
|
|
0xa7, 0x00, 0x00, 0x00, 0x30, 0x81, 0x80, 0x00, 0x39, 0x00,
|
||
|
|
0x8a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf6, 0xf6
|
||
|
|
};
|
||
|
|
|
||
|
|
priv = kzalloc(sizeof(struct tda18218_priv), GFP_KERNEL);
|
||
|
|
if (priv == NULL)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
priv->cfg = cfg;
|
||
|
|
priv->i2c = i2c;
|
||
|
|
fe->tuner_priv = priv;
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 1); /* open I2C-gate */
|
||
|
|
|
||
|
|
/* check if the tuner is there */
|
||
|
|
ret = tda18218_rd_reg(priv, R00_ID, &val);
|
||
|
|
if (!ret)
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: chip id=%02x\n", __func__, val);
|
||
|
|
if (ret || val != def_regs[R00_ID]) {
|
||
|
|
kfree(priv);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_info(&priv->i2c->dev,
|
||
|
|
"%s: NXP TDA18218HN successfully identified\n",
|
||
|
|
KBUILD_MODNAME);
|
||
|
|
|
||
|
|
memcpy(&fe->ops.tuner_ops, &tda18218_tuner_ops,
|
||
|
|
sizeof(struct dvb_tuner_ops));
|
||
|
|
memcpy(priv->regs, def_regs, sizeof(def_regs));
|
||
|
|
|
||
|
|
/* loop-through enabled chip default register values */
|
||
|
|
if (priv->cfg->loop_through) {
|
||
|
|
priv->regs[R17_PD1] = 0xb0;
|
||
|
|
priv->regs[R18_PD2] = 0x59;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* standby */
|
||
|
|
ret = tda18218_wr_reg(priv, R17_PD1, priv->regs[R17_PD1] | (1 << 0));
|
||
|
|
if (ret)
|
||
|
|
dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret);
|
||
|
|
|
||
|
|
if (fe->ops.i2c_gate_ctrl)
|
||
|
|
fe->ops.i2c_gate_ctrl(fe, 0); /* close I2C-gate */
|
||
|
|
|
||
|
|
return fe;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL(tda18218_attach);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("NXP TDA18218HN silicon tuner driver");
|
||
|
|
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
|
||
|
|
MODULE_LICENSE("GPL");
|