/*
* ITE Tech IT9137 silicon tuner driver
*
* Copyright (C) 2011 Malcolm Priestley (tvboxspy@gmail.com)
* IT9137 Copyright (C) ITE Tech Inc.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.=
*/
#include "tuner_it913x_priv.h"
struct it913x_state {
struct i2c_adapter *i2c_adap;
u8 i2c_addr;
u8 chip_ver;
u8 tuner_type;
u8 firmware_ver;
u16 tun_xtal;
u8 tun_fdiv;
u8 tun_clk_mode;
u32 tun_fn_min;
};
/* read multiple registers */
static int it913x_rd_regs(struct it913x_state *state,
u32 reg, u8 *data, u8 count)
{
int ret;
u8 b[3];
struct i2c_msg msg[2] = {
{ .addr = state->i2c_addr, .flags = 0,
.buf = b, .len = sizeof(b) },
{ .addr = state->i2c_addr, .flags = I2C_M_RD,
.buf = data, .len = count }
};
b[0] = (u8)(reg >> 16) & 0xff;
b[1] = (u8)(reg >> 8) & 0xff;
b[2] = (u8) reg & 0xff;
b[0] |= 0x80; /* All reads from demodulator */
ret = i2c_transfer(state->i2c_adap, msg, 2);
return ret;
}
/* read single register */
static int it913x_rd_reg(struct it913x_state *state, u32 reg)
{
int ret;
u8 b[1];
ret = it913x_rd_regs(state, reg, &b[0], sizeof(b));
return (ret < 0) ? -ENODEV : b[0];
}
/* write multiple registers */
static int it913x_wr_regs(struct it913x_state *state,
u8 pro, u32 reg, u8 buf[], u8 count)
{
u8 b[256];
struct i2c_msg msg[1] = {
{ .addr = state->i2c_addr, .flags = 0,
.buf = b, .len = 3 + count }
};
int ret;
b[0] = (u8)(reg >> 16) & 0xff;
b[1] = (u8)(reg >> 8) & 0xff;
b[2] = (u8) reg & 0xff;
memcpy(&b[3], buf, count);
if (pro == PRO_DMOD)
b[0] |= 0x80;
ret = i2c_transfer(state->i2c_adap, msg, 1);
if (ret < 0)
return -EIO;
return 0;
}
/* write single register */
static int it913x_wr_reg(struct it913x_state *state,
u8 pro, u32 reg, u32 data)
{
int ret;
u8 b[4];
u8 s;
b[0] = data >> 24;
b[1] = (data >> 16) & 0xff;
b[2] = (data >> 8) & 0xff;
b[3] = data & 0xff;
/* expand write as needed */
if (data < 0x100)
s = 3;
else if (data < 0x1000)
s = 2;
else if (data < 0x100000)
s = 1;
else
s = 0;
ret = it913x_wr_regs(state, pro, reg, &b[s], sizeof(b) - s);
return ret;
}
static int it913x_script_loader(struct it913x_state *state,
struct it913xset *loadscript)
{
int ret, i;
if (loadscript == NULL)
return -EINVAL;
for (i = 0; i < 1000; ++i) {
if (loadscript[i].pro == 0xff)
break;
ret = it913x_wr_regs(state, loadscript[i].pro,
loadscript[i].address,
loadscript[i].reg, loadscript[i].count);
if (ret < 0)
return -ENODEV;
}
return 0;
}
static int it913x_init(struct dvb_frontend *fe)
{
struct it913x_state *state = fe->tuner_priv;
int ret, i, reg;
u8 val, nv_val;
u8 nv[] = {48, 32, 24, 16, 12, 8, 6, 4, 2};
u8 b[2];
reg = it913x_rd_reg(state, 0xec86);
switch (reg) {
case 0:
state->tun_clk_mode = reg;
state->tun_xtal = 2000;
state->tun_fdiv = 3;
val = 16;
break;
case -ENODEV:
return -ENODEV;
case 1:
default:
state->tun_clk_mode = reg;
state->tun_xtal = 640;
state->tun_fdiv = 1;
val = 6;
break;
}
reg = it913x_rd_reg(state, 0xed03);
if (reg < 0)
return -ENODEV;
else if (reg < ARRAY_SIZE(nv))
nv_val = nv[reg];
else
nv_val = 2;
for (i = 0; i < 50; i++) {
ret = it913x_rd_regs(state, 0xed23, &b[0], sizeof(b));
reg = (b[1] << 8) + b[0];
if (reg > 0)
break;
if (ret < 0)
return -ENODEV;
udelay(2000);
}
state->tun_fn_min = state->tun_xtal * reg;
state->tun_fn_min /= (state->tun_fdiv * nv_val);
dev_dbg(&state->i2c_adap->dev, "%s: Tuner fn_min %d\n", __func__,
state->tun_fn_min);
if (state->chip_ver > 1)
msleep(50);
else {
for (i = 0; i < 50; i++) {
reg = it913x_rd_reg(state, 0xec82);
if (reg > 0)
break;
if (reg < 0)
return -ENODEV;
udelay(2000);
}
}
/* Power Up Tuner - common all versions */
ret = it913x_wr_reg(state, PRO_DMOD, 0xec40, 0x1);
ret |= it913x_wr_reg(state, PRO_DMOD, 0xfba8, 0x0);
ret |= it913x_wr_reg(state, PRO_DMOD, 0xec57, 0x0);
ret |= it913x_wr_reg(state, PRO_DMOD, 0xec58, 0x0);
return it913x_wr_reg(state, PRO_DMOD, 0xed81, val);
}
static int it9137_set_params(struct dvb_frontend *fe)
{
struct it913x_state *state = fe->tuner_priv;
struct it913xset *set_tuner = set_it9137_template;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
u32 bandwidth = p->bandwidth_hz;
u32 frequency_m = p->frequency;
int ret, reg;
u32 frequency = frequency_m / 1000;
u32 freq, temp_f, tmp;
u16 iqik_m_cal;
u16 n_div;
u8 n;
u8 l_band;
u8 lna_band;
u8 bw;
if (state->firmware_ver == 1)
set_tuner = set_it9135_template;
else
set_tuner = set_it9137_template;
dev_dbg(&state->i2c_adap->dev, "%s: Tuner Frequency %d Bandwidth %d\n",
__func__, frequency, bandwidth);
if (frequency >= 51000 && frequency <= 440000) {
l_band = 0;
lna_band = 0;
} else if (frequency > 440000 && frequency <= 484000) {
l_band = 1;
lna_band = 1;
} else if (frequency > 484000 && frequency <= 533000) {
l_band = 1;
lna_band = 2;
} else if (frequency > 533000 && frequency <= 587000) {
l_band = 1;
lna_band = 3;
} else if (frequency > 587000 && frequency <= 645000) {
l_band = 1;
lna_band = 4;
} else if (frequency > 645000 && frequency <= 710000) {
l_band = 1;
lna_band = 5;
} else if (frequency > 710000 && frequency <= 782000) {
l_band = 1;
lna_band = 6;
} else if (frequency > 782000 && frequency <= 860000) {
l_band = 1;
lna_band = 7;
} else if (frequency > 1450000 && frequency <= 1492000) {
l_band = 1;
lna_band = 0;
} else if (frequency > 1660000 && frequency <= 1685000) {
l_band = 1;
lna_band = 1;
} else
return -EINVAL;
set_tuner[0].reg[0] = lna_band;
switch (bandwidth) {
case 5000000:
bw = 0;
break;
case 6000000:
bw = 2;
break;
case 7000000:
bw = 4;
break;
default:
case 8000000:
bw = 6;
break;
}
set_tuner[1].reg[0] = bw;
set_tuner[2].reg[0] = 0xa0 | (l_band << 3);
if (frequency > 53000 && frequency <= 74000) {
n_div = 48;
n = 0;
} else if (frequency > 74000 && frequency <= 111000) {
n_div = 32;
n = 1;
} else if (frequency > 111000 && frequency <= 148000) {
n_div = 24;
n = 2;
} else if (frequency > 148000 && frequency <= 222000) {
n_div = 16;
n = 3;
} else if (frequency > 222000 && frequency <= 296000) {
n_div = 12;
n = 4;
} else if (frequency > 296000 && frequency <= 445000) {
n_div = 8;
n = 5;
} else if (frequency > 445000 && frequency <= state->tun_fn_min) {
n_div = 6;
n = 6;
} else if (frequency > state->tun_fn_min && frequency <= 950000) {
n_div = 4;
n = 7;
} else if (frequency > 1450000 && frequency <= 1680000) {
n_div = 2;
n = 0;
} else
return -EINVAL;
reg = it913x_rd_reg(state, 0xed81);
iqik_m_cal = (u16)reg * n_div;
if (reg < 0x20) {
if (state->tun_clk_mode == 0)
iqik_m_cal = (iqik_m_cal * 9) >> 5;
else
iqik_m_cal >>= 1;
} else {
iqik_m_cal = 0x40 - iqik_m_cal;
if (state->tun_clk_mode == 0)
iqik_m_cal = ~((iqik_m_cal * 9) >> 5);
else
iqik_m_cal = ~(iqik_m_cal >> 1);
}
temp_f = frequency * (u32)n_div * (u32)state->tun_fdiv;
freq = temp_f / state->tun_xtal;
tmp = freq * state->tun_xtal;
if ((temp_f - tmp) >= (state->tun_xtal >> 1))
freq++;
freq += (u32) n << 13;
/* Frequency OMEGA_IQIK_M_CAL_MID*/
temp_f = freq + (u32)iqik_m_cal;
set_tuner[3].reg[0] = temp_f & 0xff;
set_tuner[4].reg[0] = (temp_f >> 8) & 0xff;
dev_dbg(&state->i2c_adap->dev, "%s: High Frequency = %04x\n",
__func__, temp_f);
/* Lower frequency */
set_tuner[5].reg[0] = freq & 0xff;
set_tuner[6].reg[0] = (freq >> 8) & 0xff;
dev_dbg(&state->i2c_adap->dev, "%s: low Frequency = %04x\n",
__func__, freq);
ret = it913x_script_loader(state, set_tuner);
return (ret < 0) ? -ENODEV : 0;
}
/* Power sequence */
/* Power Up Tuner on -> Frontend suspend off -> Tuner clk on */
/* Power Down Frontend suspend on -> Tuner clk off -> Tuner off */
static int it913x_sleep(struct dvb_frontend *fe)
{
struct it913x_state *state = fe->tuner_priv;
return it913x_script_loader(state, it9137_tuner_off);
}
static int it913x_release(struct dvb_frontend *fe)
{
kfree(fe->tuner_priv);
return 0;
}
static const struct dvb_tuner_ops it913x_tuner_ops = {
.info = {
.name = "ITE Tech IT913X",
.frequency_min = 174000000,
.frequency_max = 862000000,
},
.release = it913x_release,
.init = it913x_init,
.sleep = it913x_sleep,
.set_params = it9137_set_params,
};
struct dvb_frontend *it913x_attach(struct dvb_frontend *fe,
struct i2c_adapter *i2c_adap, u8 i2c_addr, u8 config)
{
struct it913x_state *state = NULL;
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct it913x_state), GFP_KERNEL);
if (state == NULL)
return NULL;
state->i2c_adap = i2c_adap;
state->i2c_addr = i2c_addr;
switch (config) {
case AF9033_TUNER_IT9135_38:
case AF9033_TUNER_IT9135_51:
case AF9033_TUNER_IT9135_52:
state->chip_ver = 0x01;
break;
case AF9033_TUNER_IT9135_60:
case AF9033_TUNER_IT9135_61:
case AF9033_TUNER_IT9135_62:
state->chip_ver = 0x02;
break;
default:
dev_dbg(&i2c_adap->dev,
"%s: invalid config=%02x\n", __func__, config);
goto error;
}
state->tuner_type = config;
state->firmware_ver = 1;
fe->tuner_priv = state;
memcpy(&fe->ops.tuner_ops, &it913x_tuner_ops,
sizeof(struct dvb_tuner_ops));
dev_info(&i2c_adap->dev,
"%s: ITE Tech IT913X successfully attached\n",
KBUILD_MODNAME);
dev_dbg(&i2c_adap->dev, "%s: config=%02x chip_ver=%02x\n",
__func__, config, state->chip_ver);
return fe;
error:
kfree(state);
return NULL;
}
EXPORT_SYMBOL(it913x_attach);
MODULE_DESCRIPTION("ITE Tech IT913X silicon tuner driver");
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_LICENSE("GPL");