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alistair23-linux/drivers/media/dvb-frontends/lgdt3306a.c
Michael Ira Krufky f883d603d4 [media] lgdt3306a: do not add new typedefs 
We should not be using typedefs at the Kernel, as this makes harder
for reviewers to understand the code.

Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2015-03-03 10:34:10 -03:00

2036 lines
51 KiB
C
Raw Blame History

/*
* Support for LGDT3306A - 8VSB/QAM-B
*
* Copyright (C) 2013 Fred Richter <frichter@hauppauge.com>
* - driver structure based on lgdt3305.[ch] by Michael Krufky
* - code based on LG3306_V0.35 API by LG Electronics 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 <asm/div64.h>
#include <linux/dvb/frontend.h>
#include "dvb_math.h"
#include "lgdt3306a.h"
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "set debug level (info=1, reg=2 (or-able))");
#define DBG_INFO 1
#define DBG_REG 2
#define DBG_DUMP 4 /* FGR - comment out to remove dump code */
#define lg_printk(kern, fmt, arg...) \
printk(kern "%s(): " fmt, __func__, ##arg)
#define lg_info(fmt, arg...) printk(KERN_INFO "lgdt3306a: " fmt, ##arg)
#define lg_warn(fmt, arg...) lg_printk(KERN_WARNING, fmt, ##arg)
#define lg_err(fmt, arg...) lg_printk(KERN_ERR, fmt, ##arg)
#define lg_dbg(fmt, arg...) if (debug & DBG_INFO) \
lg_printk(KERN_DEBUG, fmt, ##arg)
#define lg_reg(fmt, arg...) if (debug & DBG_REG) \
lg_printk(KERN_DEBUG, fmt, ##arg)
#define lg_chkerr(ret) \
({ \
int __ret; \
__ret = (ret < 0); \
if (__ret) \
lg_err("error %d on line %d\n", ret, __LINE__); \
__ret; \
})
struct lgdt3306a_state {
struct i2c_adapter *i2c_adap;
const struct lgdt3306a_config *cfg;
struct dvb_frontend frontend;
fe_modulation_t current_modulation;
u32 current_frequency;
u32 snr;
};
/* -----------------------------------------------
LG3306A Register Usage
(LG does not really name the registers, so this code does not either)
0000 -> 00FF Common control and status
1000 -> 10FF Synchronizer control and status
1F00 -> 1FFF Smart Antenna control and status
2100 -> 21FF VSB Equalizer control and status
2800 -> 28FF QAM Equalizer control and status
3000 -> 30FF FEC control and status
---------------------------------------------- */
enum lgdt3306a_lock_status {
LG3306_UNLOCK = 0x00,
LG3306_LOCK = 0x01,
LG3306_UNKNOWN_LOCK = 0xFF
};
enum lgdt3306a_neverlock_status {
LG3306_NL_INIT = 0x00,
LG3306_NL_PROCESS = 0x01,
LG3306_NL_LOCK = 0x02,
LG3306_NL_FAIL = 0x03,
LG3306_NL_UNKNOWN = 0xFF
};
enum lgdt3306a_modulation {
LG3306_VSB = 0x00,
LG3306_QAM64 = 0x01,
LG3306_QAM256 = 0x02,
LG3306_UNKNOWN_MODE = 0xFF
};
enum lgdt3306a_lock_check {
LG3306_SYNC_LOCK,
LG3306_FEC_LOCK,
LG3306_TR_LOCK,
LG3306_AGC_LOCK,
};
#ifdef DBG_DUMP
static void lgdt3306a_DumpAllRegs(struct lgdt3306a_state *state);
static void lgdt3306a_DumpRegs(struct lgdt3306a_state *state);
#endif
static int lgdt3306a_write_reg(struct lgdt3306a_state *state, u16 reg, u8 val)
{
int ret;
u8 buf[] = { reg >> 8, reg & 0xff, val };
struct i2c_msg msg = {
.addr = state->cfg->i2c_addr, .flags = 0,
.buf = buf, .len = 3,
};
lg_reg("reg: 0x%04x, val: 0x%02x\n", reg, val);
ret = i2c_transfer(state->i2c_adap, &msg, 1);
if (ret != 1) {
lg_err("error (addr %02x %02x <- %02x, err = %i)\n",
msg.buf[0], msg.buf[1], msg.buf[2], ret);
if (ret < 0)
return ret;
else
return -EREMOTEIO;
}
return 0;
}
static int lgdt3306a_read_reg(struct lgdt3306a_state *state, u16 reg, u8 *val)
{
int ret;
u8 reg_buf[] = { reg >> 8, reg & 0xff };
struct i2c_msg msg[] = {
{ .addr = state->cfg->i2c_addr,
.flags = 0, .buf = reg_buf, .len = 2 },
{ .addr = state->cfg->i2c_addr,
.flags = I2C_M_RD, .buf = val, .len = 1 },
};
ret = i2c_transfer(state->i2c_adap, msg, 2);
if (ret != 2) {
lg_err("error (addr %02x reg %04x error (ret == %i)\n",
state->cfg->i2c_addr, reg, ret);
if (ret < 0)
return ret;
else
return -EREMOTEIO;
}
lg_reg("reg: 0x%04x, val: 0x%02x\n", reg, *val);
return 0;
}
#define read_reg(state, reg) \
({ \
u8 __val; \
int ret = lgdt3306a_read_reg(state, reg, &__val); \
if (lg_chkerr(ret)) \
__val = 0; \
__val; \
})
static int lgdt3306a_set_reg_bit(struct lgdt3306a_state *state,
u16 reg, int bit, int onoff)
{
u8 val;
int ret;
lg_reg("reg: 0x%04x, bit: %d, level: %d\n", reg, bit, onoff);
ret = lgdt3306a_read_reg(state, reg, &val);
if (lg_chkerr(ret))
goto fail;
val &= ~(1 << bit);
val |= (onoff & 1) << bit;
ret = lgdt3306a_write_reg(state, reg, val);
lg_chkerr(ret);
fail:
return ret;
}
/* ------------------------------------------------------------------------ */
static int lgdt3306a_soft_reset(struct lgdt3306a_state *state)
{
int ret;
lg_dbg("\n");
ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 0);
if (lg_chkerr(ret))
goto fail;
msleep(20);
ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 1);
lg_chkerr(ret);
fail:
return ret;
}
static int lgdt3306a_mpeg_mode(struct lgdt3306a_state *state,
enum lgdt3306a_mpeg_mode mode)
{
u8 val;
int ret;
lg_dbg("(%d)\n", mode);
/* transport packet format */
ret = lgdt3306a_set_reg_bit(state, 0x0071, 7, mode == LGDT3306A_MPEG_PARALLEL?1:0); /* TPSENB=0x80 */
if (lg_chkerr(ret))
goto fail;
/* start of packet signal duration */
ret = lgdt3306a_set_reg_bit(state, 0x0071, 6, 0); /* TPSSOPBITEN=0x40; 0=byte duration, 1=bit duration */
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_read_reg(state, 0x0070, &val);
if (lg_chkerr(ret))
goto fail;
val |= 0x10; /* TPCLKSUPB=0x10 */
if (mode == LGDT3306A_MPEG_PARALLEL)
val &= ~0x10;
ret = lgdt3306a_write_reg(state, 0x0070, val);
lg_chkerr(ret);
fail:
return ret;
}
static int lgdt3306a_mpeg_mode_polarity(struct lgdt3306a_state *state,
enum lgdt3306a_tp_clock_edge edge,
enum lgdt3306a_tp_valid_polarity valid)
{
u8 val;
int ret;
lg_dbg("edge=%d, valid=%d\n", edge, valid);
ret = lgdt3306a_read_reg(state, 0x0070, &val);
if (lg_chkerr(ret))
goto fail;
val &= ~0x06; /* TPCLKPOL=0x04, TPVALPOL=0x02 */
if (edge == LGDT3306A_TPCLK_RISING_EDGE)
val |= 0x04;
if (valid == LGDT3306A_TP_VALID_HIGH)
val |= 0x02;
ret = lgdt3306a_write_reg(state, 0x0070, val);
lg_chkerr(ret);
fail:
return ret;
}
static int lgdt3306a_mpeg_tristate(struct lgdt3306a_state *state,
int mode)
{
u8 val;
int ret;
lg_dbg("(%d)\n", mode);
if (mode) {
ret = lgdt3306a_read_reg(state, 0x0070, &val);
if (lg_chkerr(ret))
goto fail;
val &= ~0xA8; /* Tristate bus; TPOUTEN=0x80, TPCLKOUTEN=0x20, TPDATAOUTEN=0x08 */
ret = lgdt3306a_write_reg(state, 0x0070, val);
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_set_reg_bit(state, 0x0003, 6, 1); /* AGCIFOUTENB=0x40; 1=Disable IFAGC pin */
if (lg_chkerr(ret))
goto fail;
} else {
ret = lgdt3306a_set_reg_bit(state, 0x0003, 6, 0); /* enable IFAGC pin */
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_read_reg(state, 0x0070, &val);
if (lg_chkerr(ret))
goto fail;
val |= 0xA8; /* enable bus */
ret = lgdt3306a_write_reg(state, 0x0070, val);
if (lg_chkerr(ret))
goto fail;
}
fail:
return ret;
}
static int lgdt3306a_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
{
struct lgdt3306a_state *state = fe->demodulator_priv;
lg_dbg("acquire=%d\n", acquire);
return lgdt3306a_mpeg_tristate(state, acquire ? 0 : 1);
}
static int lgdt3306a_power(struct lgdt3306a_state *state,
int mode)
{
int ret;
lg_dbg("(%d)\n", mode);
if (mode == 0) {
ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 0); /* into reset */
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_set_reg_bit(state, 0x0000, 0, 0); /* power down */
if (lg_chkerr(ret))
goto fail;
} else {
ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 1); /* out of reset */
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_set_reg_bit(state, 0x0000, 0, 1); /* power up */
if (lg_chkerr(ret))
goto fail;
}
#ifdef DBG_DUMP
lgdt3306a_DumpAllRegs(state);
#endif
fail:
return ret;
}
static int lgdt3306a_set_vsb(struct lgdt3306a_state *state)
{
u8 val;
int ret;
lg_dbg("\n");
/* 0. Spectrum inversion detection manual; spectrum inverted */
ret = lgdt3306a_read_reg(state, 0x0002, &val);
val &= 0xF7; /* SPECINVAUTO Off */
val |= 0x04; /* SPECINV On */
ret = lgdt3306a_write_reg(state, 0x0002, val);
if (lg_chkerr(ret))
goto fail;
/* 1. Selection of standard mode(0x08=QAM, 0x80=VSB) */
ret = lgdt3306a_write_reg(state, 0x0008, 0x80);
if (lg_chkerr(ret))
goto fail;
/* 2. Bandwidth mode for VSB(6MHz) */
ret = lgdt3306a_read_reg(state, 0x0009, &val);
val &= 0xE3;
val |= 0x0C; /* STDOPDETTMODE[2:0]=3 */
ret = lgdt3306a_write_reg(state, 0x0009, val);
if (lg_chkerr(ret))
goto fail;
/* 3. QAM mode detection mode(None) */
ret = lgdt3306a_read_reg(state, 0x0009, &val);
val &= 0xFC; /* STDOPDETCMODE[1:0]=0 */
ret = lgdt3306a_write_reg(state, 0x0009, val);
if (lg_chkerr(ret))
goto fail;
/* 4. ADC sampling frequency rate(2x sampling) */
ret = lgdt3306a_read_reg(state, 0x000D, &val);
val &= 0xBF; /* SAMPLING4XFEN=0 */
ret = lgdt3306a_write_reg(state, 0x000D, val);
if (lg_chkerr(ret))
goto fail;
#if 0
/* FGR - disable any AICC filtering, testing only */
ret = lgdt3306a_write_reg(state, 0x0024, 0x00);
if (lg_chkerr(ret))
goto fail;
/* AICCFIXFREQ0 NT N-1(Video rejection) */
ret = lgdt3306a_write_reg(state, 0x002E, 0x00);
ret = lgdt3306a_write_reg(state, 0x002F, 0x00);
ret = lgdt3306a_write_reg(state, 0x0030, 0x00);
/* AICCFIXFREQ1 NT N-1(Audio rejection) */
ret = lgdt3306a_write_reg(state, 0x002B, 0x00);
ret = lgdt3306a_write_reg(state, 0x002C, 0x00);
ret = lgdt3306a_write_reg(state, 0x002D, 0x00);
/* AICCFIXFREQ2 NT Co-Channel(Video rejection) */
ret = lgdt3306a_write_reg(state, 0x0028, 0x00);
ret = lgdt3306a_write_reg(state, 0x0029, 0x00);
ret = lgdt3306a_write_reg(state, 0x002A, 0x00);
/* AICCFIXFREQ3 NT Co-Channel(Audio rejection) */
ret = lgdt3306a_write_reg(state, 0x0025, 0x00);
ret = lgdt3306a_write_reg(state, 0x0026, 0x00);
ret = lgdt3306a_write_reg(state, 0x0027, 0x00);
#else
/* FGR - this works well for HVR-1955,1975 */
/* 5. AICCOPMODE NT N-1 Adj. */
ret = lgdt3306a_write_reg(state, 0x0024, 0x5A);
if (lg_chkerr(ret))
goto fail;
/* AICCFIXFREQ0 NT N-1(Video rejection) */
ret = lgdt3306a_write_reg(state, 0x002E, 0x5A);
ret = lgdt3306a_write_reg(state, 0x002F, 0x00);
ret = lgdt3306a_write_reg(state, 0x0030, 0x00);
/* AICCFIXFREQ1 NT N-1(Audio rejection) */
ret = lgdt3306a_write_reg(state, 0x002B, 0x36);
ret = lgdt3306a_write_reg(state, 0x002C, 0x00);
ret = lgdt3306a_write_reg(state, 0x002D, 0x00);
/* AICCFIXFREQ2 NT Co-Channel(Video rejection) */
ret = lgdt3306a_write_reg(state, 0x0028, 0x2A);
ret = lgdt3306a_write_reg(state, 0x0029, 0x00);
ret = lgdt3306a_write_reg(state, 0x002A, 0x00);
/* AICCFIXFREQ3 NT Co-Channel(Audio rejection) */
ret = lgdt3306a_write_reg(state, 0x0025, 0x06);
ret = lgdt3306a_write_reg(state, 0x0026, 0x00);
ret = lgdt3306a_write_reg(state, 0x0027, 0x00);
#endif
ret = lgdt3306a_read_reg(state, 0x001E, &val);
val &= 0x0F;
val |= 0xA0;
ret = lgdt3306a_write_reg(state, 0x001E, val);
ret = lgdt3306a_write_reg(state, 0x0022, 0x08);
ret = lgdt3306a_write_reg(state, 0x0023, 0xFF);
ret = lgdt3306a_read_reg(state, 0x211F, &val);
val &= 0xEF;
ret = lgdt3306a_write_reg(state, 0x211F, val);
ret = lgdt3306a_write_reg(state, 0x2173, 0x01);
ret = lgdt3306a_read_reg(state, 0x1061, &val);
val &= 0xF8;
val |= 0x04;
ret = lgdt3306a_write_reg(state, 0x1061, val);
ret = lgdt3306a_read_reg(state, 0x103D, &val);
val &= 0xCF;
ret = lgdt3306a_write_reg(state, 0x103D, val);
ret = lgdt3306a_write_reg(state, 0x2122, 0x40);
ret = lgdt3306a_read_reg(state, 0x2141, &val);
val &= 0x3F;
ret = lgdt3306a_write_reg(state, 0x2141, val);
ret = lgdt3306a_read_reg(state, 0x2135, &val);
val &= 0x0F;
val |= 0x70;
ret = lgdt3306a_write_reg(state, 0x2135, val);
ret = lgdt3306a_read_reg(state, 0x0003, &val);
val &= 0xF7;
ret = lgdt3306a_write_reg(state, 0x0003, val);
ret = lgdt3306a_read_reg(state, 0x001C, &val);
val &= 0x7F;
ret = lgdt3306a_write_reg(state, 0x001C, val);
/* 6. EQ step size */
ret = lgdt3306a_read_reg(state, 0x2179, &val);
val &= 0xF8;
ret = lgdt3306a_write_reg(state, 0x2179, val);
ret = lgdt3306a_read_reg(state, 0x217A, &val);
val &= 0xF8;
ret = lgdt3306a_write_reg(state, 0x217A, val);
/* 7. Reset */
ret = lgdt3306a_soft_reset(state);
if (lg_chkerr(ret))
goto fail;
lg_dbg("complete\n");
fail:
return ret;
}
static int lgdt3306a_set_qam(struct lgdt3306a_state *state, int modulation)
{
u8 val;
int ret;
lg_dbg("modulation=%d\n", modulation);
/* 1. Selection of standard mode(0x08=QAM, 0x80=VSB) */
ret = lgdt3306a_write_reg(state, 0x0008, 0x08);
if (lg_chkerr(ret))
goto fail;
/* 1a. Spectrum inversion detection to Auto */
ret = lgdt3306a_read_reg(state, 0x0002, &val);
val &= 0xFB; /* SPECINV Off */
val |= 0x08; /* SPECINVAUTO On */
ret = lgdt3306a_write_reg(state, 0x0002, val);
if (lg_chkerr(ret))
goto fail;
/* 2. Bandwidth mode for QAM */
ret = lgdt3306a_read_reg(state, 0x0009, &val);
val &= 0xE3; /* STDOPDETTMODE[2:0]=0 VSB Off */
ret = lgdt3306a_write_reg(state, 0x0009, val);
if (lg_chkerr(ret))
goto fail;
/* 3. : 64QAM/256QAM detection(manual, auto) */
ret = lgdt3306a_read_reg(state, 0x0009, &val);
val &= 0xFC;
val |= 0x02; /* STDOPDETCMODE[1:0]=1=Manual 2=Auto */
ret = lgdt3306a_write_reg(state, 0x0009, val);
if (lg_chkerr(ret))
goto fail;
/* 3a. : 64QAM/256QAM selection for manual */
ret = lgdt3306a_read_reg(state, 0x101a, &val);
val &= 0xF8;
if (modulation == QAM_64)
val |= 0x02; /* QMDQMODE[2:0]=2=QAM64 */
else
val |= 0x04; /* QMDQMODE[2:0]=4=QAM256 */
ret = lgdt3306a_write_reg(state, 0x101a, val);
if (lg_chkerr(ret))
goto fail;
/* 4. ADC sampling frequency rate(4x sampling) */
ret = lgdt3306a_read_reg(state, 0x000D, &val);
val &= 0xBF;
val |= 0x40; /* SAMPLING4XFEN=1 */
ret = lgdt3306a_write_reg(state, 0x000D, val);
if (lg_chkerr(ret))
goto fail;
/* 5. No AICC operation in QAM mode */
ret = lgdt3306a_read_reg(state, 0x0024, &val);
val &= 0x00;
ret = lgdt3306a_write_reg(state, 0x0024, val);
if (lg_chkerr(ret))
goto fail;
/* 6. Reset */
ret = lgdt3306a_soft_reset(state);
if (lg_chkerr(ret))
goto fail;
lg_dbg("complete\n");
fail:
return ret;
}
static int lgdt3306a_set_modulation(struct lgdt3306a_state *state,
struct dtv_frontend_properties *p)
{
int ret;
lg_dbg("\n");
switch (p->modulation) {
case VSB_8:
ret = lgdt3306a_set_vsb(state);
break;
case QAM_64:
ret = lgdt3306a_set_qam(state, QAM_64);
break;
case QAM_256:
ret = lgdt3306a_set_qam(state, QAM_256);
break;
default:
return -EINVAL;
}
if (lg_chkerr(ret))
goto fail;
state->current_modulation = p->modulation;
fail:
return ret;
}
/* ------------------------------------------------------------------------ */
static int lgdt3306a_agc_setup(struct lgdt3306a_state *state,
struct dtv_frontend_properties *p)
{
/* TODO: anything we want to do here??? */
lg_dbg("\n");
switch (p->modulation) {
case VSB_8:
break;
case QAM_64:
case QAM_256:
break;
default:
return -EINVAL;
}
return 0;
}
/* ------------------------------------------------------------------------ */
static int lgdt3306a_set_inversion(struct lgdt3306a_state *state,
int inversion)
{
int ret;
lg_dbg("(%d)\n", inversion);
ret = lgdt3306a_set_reg_bit(state, 0x0002, 2, inversion ? 1 : 0);
return ret;
}
static int lgdt3306a_set_inversion_auto(struct lgdt3306a_state *state,
int enabled)
{
int ret;
lg_dbg("(%d)\n", enabled);
/* 0=Manual 1=Auto(QAM only) */
ret = lgdt3306a_set_reg_bit(state, 0x0002, 3, enabled);/* SPECINVAUTO=0x04 */
return ret;
}
static int lgdt3306a_spectral_inversion(struct lgdt3306a_state *state,
struct dtv_frontend_properties *p,
int inversion)
{
int ret = 0;
lg_dbg("(%d)\n", inversion);
#if 0
/* FGR - spectral_inversion defaults already set for VSB and QAM; can enable later if desired */
ret = lgdt3306a_set_inversion(state, inversion);
switch (p->modulation) {
case VSB_8:
ret = lgdt3306a_set_inversion_auto(state, 0); /* Manual only for VSB */
break;
case QAM_64:
case QAM_256:
ret = lgdt3306a_set_inversion_auto(state, 1); /* Auto ok for QAM */
break;
default:
ret = -EINVAL;
}
#endif
return ret;
}
static int lgdt3306a_set_if(struct lgdt3306a_state *state,
struct dtv_frontend_properties *p)
{
int ret;
u16 if_freq_khz;
u8 nco1, nco2;
switch (p->modulation) {
case VSB_8:
if_freq_khz = state->cfg->vsb_if_khz;
break;
case QAM_64:
case QAM_256:
if_freq_khz = state->cfg->qam_if_khz;
break;
default:
return -EINVAL;
}
switch (if_freq_khz) {
default:
lg_warn("IF=%d KHz is not supportted, 3250 assumed\n", if_freq_khz);
/* fallthrough */
case 3250: /* 3.25Mhz */
nco1 = 0x34;
nco2 = 0x00;
break;
case 3500: /* 3.50Mhz */
nco1 = 0x38;
nco2 = 0x00;
break;
case 4000: /* 4.00Mhz */
nco1 = 0x40;
nco2 = 0x00;
break;
case 5000: /* 5.00Mhz */
nco1 = 0x50;
nco2 = 0x00;
break;
case 5380: /* 5.38Mhz */
nco1 = 0x56;
nco2 = 0x14;
break;
}
ret = lgdt3306a_write_reg(state, 0x0010, nco1);
ret = lgdt3306a_write_reg(state, 0x0011, nco2);
lg_dbg("if_freq=%d KHz->[%04x]\n", if_freq_khz, nco1<<8 | nco2);
return 0;
}
/* ------------------------------------------------------------------------ */
static int lgdt3306a_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
struct lgdt3306a_state *state = fe->demodulator_priv;
if (state->cfg->deny_i2c_rptr) {
lg_dbg("deny_i2c_rptr=%d\n", state->cfg->deny_i2c_rptr);
return 0;
}
lg_dbg("(%d)\n", enable);
return lgdt3306a_set_reg_bit(state, 0x0002, 7, enable ? 0 : 1); /* NI2CRPTEN=0x80 */
}
static int lgdt3306a_sleep(struct lgdt3306a_state *state)
{
int ret;
lg_dbg("\n");
state->current_frequency = -1; /* force re-tune, when we wake */
ret = lgdt3306a_mpeg_tristate(state, 1); /* disable data bus */
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_power(state, 0); /* power down */
lg_chkerr(ret);
fail:
return 0;
}
static int lgdt3306a_fe_sleep(struct dvb_frontend *fe)
{
struct lgdt3306a_state *state = fe->demodulator_priv;
return lgdt3306a_sleep(state);
}
static int lgdt3306a_init(struct dvb_frontend *fe)
{
struct lgdt3306a_state *state = fe->demodulator_priv;
u8 val;
int ret;
lg_dbg("\n");
/* 1. Normal operation mode */
ret = lgdt3306a_set_reg_bit(state, 0x0001, 0, 1); /* SIMFASTENB=0x01 */
if (lg_chkerr(ret))
goto fail;
/* 2. Spectrum inversion auto detection (Not valid for VSB) */
ret = lgdt3306a_set_inversion_auto(state, 0);
if (lg_chkerr(ret))
goto fail;
/* 3. Spectrum inversion(According to the tuner configuration) */
ret = lgdt3306a_set_inversion(state, 1);
if (lg_chkerr(ret))
goto fail;
/* 4. Peak-to-peak voltage of ADC input signal */
ret = lgdt3306a_set_reg_bit(state, 0x0004, 7, 1); /* ADCSEL1V=0x80=1Vpp; 0x00=2Vpp */
if (lg_chkerr(ret))
goto fail;
/* 5. ADC output data capture clock phase */
ret = lgdt3306a_set_reg_bit(state, 0x0004, 2, 0); /* 0=same phase as ADC clock */
if (lg_chkerr(ret))
goto fail;
/* 5a. ADC sampling clock source */
ret = lgdt3306a_set_reg_bit(state, 0x0004, 3, 0); /* ADCCLKPLLSEL=0x08; 0=use ext clock, not PLL */
if (lg_chkerr(ret))
goto fail;
/* 6. Automatic PLL set */
ret = lgdt3306a_set_reg_bit(state, 0x0005, 6, 0); /* PLLSETAUTO=0x40; 0=off */
if (lg_chkerr(ret))
goto fail;
if (state->cfg->xtalMHz == 24) { /* 24MHz */
/* 7. Frequency for PLL output(0x2564 for 192MHz for 24MHz) */
ret = lgdt3306a_read_reg(state, 0x0005, &val);
if (lg_chkerr(ret))
goto fail;
val &= 0xC0;
val |= 0x25;
ret = lgdt3306a_write_reg(state, 0x0005, val);
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_write_reg(state, 0x0006, 0x64);
if (lg_chkerr(ret))
goto fail;
/* 8. ADC sampling frequency(0x180000 for 24MHz sampling) */
ret = lgdt3306a_read_reg(state, 0x000D, &val);
if (lg_chkerr(ret))
goto fail;
val &= 0xC0;
val |= 0x18;
ret = lgdt3306a_write_reg(state, 0x000D, val);
if (lg_chkerr(ret))
goto fail;
} else if (state->cfg->xtalMHz == 25) { /* 25MHz */
/* 7. Frequency for PLL output */
ret = lgdt3306a_read_reg(state, 0x0005, &val);
if (lg_chkerr(ret))
goto fail;
val &= 0xC0;
val |= 0x25;
ret = lgdt3306a_write_reg(state, 0x0005, val);
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_write_reg(state, 0x0006, 0x64);
if (lg_chkerr(ret))
goto fail;
/* 8. ADC sampling frequency(0x190000 for 25MHz sampling) */
ret = lgdt3306a_read_reg(state, 0x000D, &val);
if (lg_chkerr(ret))
goto fail;
val &= 0xC0;
val |= 0x19;
ret = lgdt3306a_write_reg(state, 0x000D, val);
if (lg_chkerr(ret))
goto fail;
} else {
lg_err("Bad xtalMHz=%d\n", state->cfg->xtalMHz);
}
#if 0
ret = lgdt3306a_write_reg(state, 0x000E, 0x00);
ret = lgdt3306a_write_reg(state, 0x000F, 0x00);
#endif
/* 9. Center frequency of input signal of ADC */
ret = lgdt3306a_write_reg(state, 0x0010, 0x34); /* 3.25MHz */
ret = lgdt3306a_write_reg(state, 0x0011, 0x00);
/* 10. Fixed gain error value */
ret = lgdt3306a_write_reg(state, 0x0014, 0); /* gain error=0 */
/* 10a. VSB TR BW gear shift initial step */
ret = lgdt3306a_read_reg(state, 0x103C, &val);
val &= 0x0F;
val |= 0x20; /* SAMGSAUTOSTL_V[3:0] = 2 */
ret = lgdt3306a_write_reg(state, 0x103C, val);
/* 10b. Timing offset calibration in low temperature for VSB */
ret = lgdt3306a_read_reg(state, 0x103D, &val);
val &= 0xFC;
val |= 0x03;
ret = lgdt3306a_write_reg(state, 0x103D, val);
/* 10c. Timing offset calibration in low temperature for QAM */
ret = lgdt3306a_read_reg(state, 0x1036, &val);
val &= 0xF0;
val |= 0x0C;
ret = lgdt3306a_write_reg(state, 0x1036, val);
/* 11. Using the imaginary part of CIR in CIR loading */
ret = lgdt3306a_read_reg(state, 0x211F, &val);
val &= 0xEF; /* do not use imaginary of CIR */
ret = lgdt3306a_write_reg(state, 0x211F, val);
/* 12. Control of no signal detector function */
ret = lgdt3306a_read_reg(state, 0x2849, &val);
val &= 0xEF; /* NOUSENOSIGDET=0, enable no signal detector */
ret = lgdt3306a_write_reg(state, 0x2849, val);
/* FGR - put demod in some known mode */
ret = lgdt3306a_set_vsb(state);
/* 13. TP stream format */
ret = lgdt3306a_mpeg_mode(state, state->cfg->mpeg_mode);
/* 14. disable output buses */
ret = lgdt3306a_mpeg_tristate(state, 1);
/* 15. Sleep (in reset) */
ret = lgdt3306a_sleep(state);
lg_chkerr(ret);
fail:
return ret;
}
static int lgdt3306a_set_parameters(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct lgdt3306a_state *state = fe->demodulator_priv;
int ret;
lg_dbg("(%d, %d)\n", p->frequency, p->modulation);
if (state->current_frequency == p->frequency &&
state->current_modulation == p->modulation) {
lg_dbg(" (already set, skipping ...)\n");
return 0;
}
state->current_frequency = -1;
state->current_modulation = -1;
ret = lgdt3306a_power(state, 1); /* power up */
if (lg_chkerr(ret))
goto fail;
if (fe->ops.tuner_ops.set_params) {
ret = fe->ops.tuner_ops.set_params(fe);
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 0);
#if 0
if (lg_chkerr(ret))
goto fail;
state->current_frequency = p->frequency;
#endif
}
ret = lgdt3306a_set_modulation(state, p);
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_agc_setup(state, p);
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_set_if(state, p);
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_spectral_inversion(state, p,
state->cfg->spectral_inversion ? 1 : 0);
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_mpeg_mode(state, state->cfg->mpeg_mode);
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_mpeg_mode_polarity(state,
state->cfg->tpclk_edge,
state->cfg->tpvalid_polarity);
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_mpeg_tristate(state, 0); /* enable data bus */
if (lg_chkerr(ret))
goto fail;
ret = lgdt3306a_soft_reset(state);
if (lg_chkerr(ret))
goto fail;
#ifdef DBG_DUMP
lgdt3306a_DumpAllRegs(state);
#endif
state->current_frequency = p->frequency;
fail:
return ret;
}
static int lgdt3306a_get_frontend(struct dvb_frontend *fe)
{
struct lgdt3306a_state *state = fe->demodulator_priv;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
lg_dbg("(%u, %d)\n", state->current_frequency, state->current_modulation);
p->modulation = state->current_modulation;
p->frequency = state->current_frequency;
return 0;
}
static enum dvbfe_algo lgdt3306a_get_frontend_algo(struct dvb_frontend *fe)
{
#if 1
return DVBFE_ALGO_CUSTOM;
#else
return DVBFE_ALGO_HW;
#endif
}
/* ------------------------------------------------------------------------ */
static void lgdt3306a_monitor_vsb(struct lgdt3306a_state *state)
{
u8 val;
int ret;
u8 snrRef, maxPowerMan, nCombDet;
u16 fbDlyCir;
ret = lgdt3306a_read_reg(state, 0x21A1, &val);
snrRef = val & 0x3F;
ret = lgdt3306a_read_reg(state, 0x2185, &maxPowerMan);
ret = lgdt3306a_read_reg(state, 0x2191, &val);
nCombDet = (val & 0x80) >> 7;
ret = lgdt3306a_read_reg(state, 0x2180, &val);
fbDlyCir = (val & 0x03) << 8;
ret = lgdt3306a_read_reg(state, 0x2181, &val);
fbDlyCir |= val;
lg_dbg("snrRef=%d maxPowerMan=0x%x nCombDet=%d fbDlyCir=0x%x\n",
snrRef, maxPowerMan, nCombDet, fbDlyCir);
/* Carrier offset sub loop bandwidth */
ret = lgdt3306a_read_reg(state, 0x1061, &val);
val &= 0xF8;
if ((snrRef > 18) && (maxPowerMan > 0x68) && (nCombDet == 0x01) && ((fbDlyCir == 0x03FF) || (fbDlyCir < 0x6C))) {
/* SNR is over 18dB and no ghosting */
val |= 0x00; /* final bandwidth = 0 */
} else {
val |= 0x04; /* final bandwidth = 4 */
}
ret = lgdt3306a_write_reg(state, 0x1061, val);
/* Adjust Notch Filter */
ret = lgdt3306a_read_reg(state, 0x0024, &val);
val &= 0x0F;
if (nCombDet == 0) { /* Turn on the Notch Filter */
val |= 0x50;
}
ret = lgdt3306a_write_reg(state, 0x0024, val);
/* VSB Timing Recovery output normalization */
ret = lgdt3306a_read_reg(state, 0x103D, &val);
val &= 0xCF;
val |= 0x20;
ret = lgdt3306a_write_reg(state, 0x103D, val);
}
static enum lgdt3306a_modulation lgdt3306a_check_oper_mode(struct lgdt3306a_state *state)
{
u8 val = 0;
int ret;
ret = lgdt3306a_read_reg(state, 0x0081, &val);
if (val & 0x80) {
lg_dbg("VSB\n");
return LG3306_VSB;
}
if (val & 0x08) {
ret = lgdt3306a_read_reg(state, 0x00A6, &val);
val = val >> 2;
if (val & 0x01) {
lg_dbg("QAM256\n");
return LG3306_QAM256;
} else {
lg_dbg("QAM64\n");
return LG3306_QAM64;
}
}
lg_warn("UNKNOWN\n");
return LG3306_UNKNOWN_MODE;
}
static enum lgdt3306a_lock_status lgdt3306a_check_lock_status(struct lgdt3306a_state *state,
enum lgdt3306a_lock_check whatLock)
{
u8 val = 0;
int ret;
enum lgdt3306a_modulation modeOper;
enum lgdt3306a_lock_status lockStatus;
modeOper = LG3306_UNKNOWN_MODE;
switch (whatLock) {
case LG3306_SYNC_LOCK:
{
ret = lgdt3306a_read_reg(state, 0x00A6, &val);
if ((val & 0x80) == 0x80)
lockStatus = LG3306_LOCK;
else
lockStatus = LG3306_UNLOCK;
lg_dbg("SYNC_LOCK=%x\n", lockStatus);
break;
}
case LG3306_AGC_LOCK:
{
ret = lgdt3306a_read_reg(state, 0x0080, &val);
if ((val & 0x40) == 0x40)
lockStatus = LG3306_LOCK;
else
lockStatus = LG3306_UNLOCK;
lg_dbg("AGC_LOCK=%x\n", lockStatus);
break;
}
case LG3306_TR_LOCK:
{
modeOper = lgdt3306a_check_oper_mode(state);
if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) {
ret = lgdt3306a_read_reg(state, 0x1094, &val);
if ((val & 0x80) == 0x80)
lockStatus = LG3306_LOCK;
else
lockStatus = LG3306_UNLOCK;
} else
lockStatus = LG3306_UNKNOWN_LOCK;
lg_dbg("TR_LOCK=%x\n", lockStatus);
break;
}
case LG3306_FEC_LOCK:
{
modeOper = lgdt3306a_check_oper_mode(state);
if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) {
ret = lgdt3306a_read_reg(state, 0x0080, &val);
if ((val & 0x10) == 0x10)
lockStatus = LG3306_LOCK;
else
lockStatus = LG3306_UNLOCK;
} else
lockStatus = LG3306_UNKNOWN_LOCK;
lg_dbg("FEC_LOCK=%x\n", lockStatus);
break;
}
default:
lockStatus = LG3306_UNKNOWN_LOCK;
lg_warn("UNKNOWN whatLock=%d\n", whatLock);
break;
}
return lockStatus;
}
static enum lgdt3306a_neverlock_status lgdt3306a_check_neverlock_status(struct lgdt3306a_state *state)
{
u8 val = 0;
int ret;
enum lgdt3306a_neverlock_status lockStatus;
ret = lgdt3306a_read_reg(state, 0x0080, &val);
lockStatus = (enum lgdt3306a_neverlock_status)(val & 0x03);
lg_dbg("NeverLock=%d", lockStatus);
return lockStatus;
}
static void lgdt3306a_pre_monitoring(struct lgdt3306a_state *state)
{
u8 val = 0;
int ret;
u8 currChDiffACQ, snrRef, mainStrong, aiccrejStatus;
/* Channel variation */
ret = lgdt3306a_read_reg(state, 0x21BC, &currChDiffACQ);
/* SNR of Frame sync */
ret = lgdt3306a_read_reg(state, 0x21A1, &val);
snrRef = val & 0x3F;
/* Strong Main CIR */
ret = lgdt3306a_read_reg(state, 0x2199, &val);
mainStrong = (val & 0x40) >> 6;
ret = lgdt3306a_read_reg(state, 0x0090, &val);
aiccrejStatus = (val & 0xF0) >> 4;
lg_dbg("snrRef=%d mainStrong=%d aiccrejStatus=%d currChDiffACQ=0x%x\n",
snrRef, mainStrong, aiccrejStatus, currChDiffACQ);
#if 0
if ((mainStrong == 0) && (currChDiffACQ > 0x70)) /* Dynamic ghost exists */
#endif
if (mainStrong == 0) {
ret = lgdt3306a_read_reg(state, 0x2135, &val);
val &= 0x0F;
val |= 0xA0;
ret = lgdt3306a_write_reg(state, 0x2135, val);
ret = lgdt3306a_read_reg(state, 0x2141, &val);
val &= 0x3F;
val |= 0x80;
ret = lgdt3306a_write_reg(state, 0x2141, val);
ret = lgdt3306a_write_reg(state, 0x2122, 0x70);
} else { /* Weak ghost or static channel */
ret = lgdt3306a_read_reg(state, 0x2135, &val);
val &= 0x0F;
val |= 0x70;
ret = lgdt3306a_write_reg(state, 0x2135, val);
ret = lgdt3306a_read_reg(state, 0x2141, &val);
val &= 0x3F;
val |= 0x40;
ret = lgdt3306a_write_reg(state, 0x2141, val);
ret = lgdt3306a_write_reg(state, 0x2122, 0x40);
}
}
static enum lgdt3306a_lock_status lgdt3306a_sync_lock_poll(struct lgdt3306a_state *state)
{
enum lgdt3306a_lock_status syncLockStatus = LG3306_UNLOCK;
int i;
for (i = 0; i < 2; i++) {
msleep(30);
syncLockStatus = lgdt3306a_check_lock_status(state, LG3306_SYNC_LOCK);
if (syncLockStatus == LG3306_LOCK) {
lg_dbg("locked(%d)\n", i);
return LG3306_LOCK;
}
}
lg_dbg("not locked\n");
return LG3306_UNLOCK;
}
static enum lgdt3306a_lock_status lgdt3306a_fec_lock_poll(struct lgdt3306a_state *state)
{
enum lgdt3306a_lock_status FECLockStatus = LG3306_UNLOCK;
int i;
for (i = 0; i < 2; i++) {
msleep(30);
FECLockStatus = lgdt3306a_check_lock_status(state, LG3306_FEC_LOCK);
if (FECLockStatus == LG3306_LOCK) {
lg_dbg("locked(%d)\n", i);
return FECLockStatus;
}
}
lg_dbg("not locked\n");
return FECLockStatus;
}
static enum lgdt3306a_neverlock_status lgdt3306a_neverlock_poll(struct lgdt3306a_state *state)
{
enum lgdt3306a_neverlock_status NLLockStatus = LG3306_NL_FAIL;
int i;
for (i = 0; i < 5; i++) {
msleep(30);
NLLockStatus = lgdt3306a_check_neverlock_status(state);
if (NLLockStatus == LG3306_NL_LOCK) {
lg_dbg("NL_LOCK(%d)\n", i);
return NLLockStatus;
}
}
lg_dbg("NLLockStatus=%d\n", NLLockStatus);
return NLLockStatus;
}
static u8 lgdt3306a_get_packet_error(struct lgdt3306a_state *state)
{
u8 val;
int ret;
ret = lgdt3306a_read_reg(state, 0x00FA, &val);
return val;
}
static u32 log10_x1000(u32 x)
{
static u32 valx_x10[] = { 10, 11, 13, 15, 17, 20, 25, 33, 41, 50, 59, 73, 87, 100 };
static u32 log10x_x1000[] = { 0, 41, 114, 176, 230, 301, 398, 518, 613, 699, 771, 863, 939, 1000 };
static u32 nelems = sizeof(valx_x10)/sizeof(valx_x10[0]);
u32 log_val = 0;
u32 i;
if (x <= 0)
return -1000000; /* signal error */
if (x < 10) {
while (x < 10) {
x = x * 10;
log_val--;
}
} else if (x == 10) {
return 0; /* log(1)=0 */
} else {
while (x >= 100) {
x = x / 10;
log_val++;
}
}
log_val *= 1000;
if (x == 10) /* was our input an exact multiple of 10 */
return log_val; /* don't need to interpolate */
/* find our place on the log curve */
for (i = 1; i < nelems; i++) {
if (valx_x10[i] >= x)
break;
}
{
u32 diff_val = x - valx_x10[i-1];
u32 step_val = valx_x10[i] - valx_x10[i-1];
u32 step_log10 = log10x_x1000[i] - log10x_x1000[i-1];
/* do a linear interpolation to get in-between values */
return log_val + log10x_x1000[i-1] +
((diff_val*step_log10) / step_val);
}
}
static u32 lgdt3306a_calculate_snr_x100(struct lgdt3306a_state *state)
{
u32 mse; /* Mean-Square Error */
u32 pwr; /* Constelation power */
u32 snr_x100;
mse = (read_reg(state, 0x00EC) << 8) |
(read_reg(state, 0x00ED));
pwr = (read_reg(state, 0x00E8) << 8) |
(read_reg(state, 0x00E9));
if (mse == 0) /* no signal */
return 0;
snr_x100 = log10_x1000((pwr * 10000) / mse) - 3000;
lg_dbg("mse=%u, pwr=%u, snr_x100=%d\n", mse, pwr, snr_x100);
return snr_x100;
}
static enum lgdt3306a_lock_status lgdt3306a_vsb_lock_poll(struct lgdt3306a_state *state)
{
u8 cnt = 0;
u8 packet_error;
u32 snr;
while (1) {
if (lgdt3306a_sync_lock_poll(state) == LG3306_UNLOCK) {
lg_dbg("no sync lock!\n");
return LG3306_UNLOCK;
} else {
msleep(20);
lgdt3306a_pre_monitoring(state);
packet_error = lgdt3306a_get_packet_error(state);
snr = lgdt3306a_calculate_snr_x100(state);
lg_dbg("cnt=%d errors=%d snr=%d\n",
cnt, packet_error, snr);
if ((snr < 1500) || (packet_error >= 0xff))
cnt++;
else
return LG3306_LOCK;
if (cnt >= 10) {
lg_dbg("not locked!\n");
return LG3306_UNLOCK;
}
}
}
return LG3306_UNLOCK;
}
static enum lgdt3306a_lock_status lgdt3306a_qam_lock_poll(struct lgdt3306a_state *state)
{
u8 cnt = 0;
u8 packet_error;
u32 snr;
while (1) {
if (lgdt3306a_fec_lock_poll(state) == LG3306_UNLOCK) {
lg_dbg("no fec lock!\n");
return LG3306_UNLOCK;
} else {
msleep(20);
packet_error = lgdt3306a_get_packet_error(state);
snr = lgdt3306a_calculate_snr_x100(state);
lg_dbg("cnt=%d errors=%d snr=%d\n",
cnt, packet_error, snr);
if ((snr < 1500) || (packet_error >= 0xff))
cnt++;
else
return LG3306_LOCK;
if (cnt >= 10) {
lg_dbg("not locked!\n");
return LG3306_UNLOCK;
}
}
}
return LG3306_UNLOCK;
}
static int lgdt3306a_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct lgdt3306a_state *state = fe->demodulator_priv;
u16 strength = 0;
int ret = 0;
if (fe->ops.tuner_ops.get_rf_strength) {
ret = fe->ops.tuner_ops.get_rf_strength(fe, &strength);
if (ret == 0) {
lg_dbg("strength=%d\n", strength);
} else {
lg_dbg("fe->ops.tuner_ops.get_rf_strength() failed\n");
}
}
*status = 0;
if (lgdt3306a_neverlock_poll(state) == LG3306_NL_LOCK) {
*status |= FE_HAS_SIGNAL;
*status |= FE_HAS_CARRIER;
switch (state->current_modulation) {
case QAM_256:
case QAM_64:
if (lgdt3306a_qam_lock_poll(state) == LG3306_LOCK) {
*status |= FE_HAS_VITERBI;
*status |= FE_HAS_SYNC;
*status |= FE_HAS_LOCK;
}
break;
case VSB_8:
if (lgdt3306a_vsb_lock_poll(state) == LG3306_LOCK) {
*status |= FE_HAS_VITERBI;
*status |= FE_HAS_SYNC;
*status |= FE_HAS_LOCK;
lgdt3306a_monitor_vsb(state);
}
break;
default:
ret = -EINVAL;
}
}
return ret;
}
static int lgdt3306a_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct lgdt3306a_state *state = fe->demodulator_priv;
state->snr = lgdt3306a_calculate_snr_x100(state);
/* report SNR in dB * 10 */
*snr = state->snr/10;
return 0;
}
static int lgdt3306a_read_signal_strength(struct dvb_frontend *fe,
u16 *strength)
{
/*
* Calculate some sort of "strength" from SNR
*/
struct lgdt3306a_state *state = fe->demodulator_priv;
u16 snr; /* snr_x10 */
int ret;
u32 ref_snr; /* snr*100 */
u32 str;
*strength = 0;
switch (state->current_modulation) {
case VSB_8:
ref_snr = 1600; /* 16dB */
break;
case QAM_64:
ref_snr = 2200; /* 22dB */
break;
case QAM_256:
ref_snr = 2800; /* 28dB */
break;
default:
return -EINVAL;
}
ret = fe->ops.read_snr(fe, &snr);
if (lg_chkerr(ret))
goto fail;
if (state->snr <= (ref_snr - 100))
str = 0;
else if (state->snr <= ref_snr)
str = (0xffff * 65) / 100; /* 65% */
else {
str = state->snr - ref_snr;
str /= 50;
str += 78; /* 78%-100% */
if (str > 100)
str = 100;
str = (0xffff * str) / 100;
}
*strength = (u16)str;
lg_dbg("strength=%u\n", *strength);
fail:
return ret;
}
/* ------------------------------------------------------------------------ */
static int lgdt3306a_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct lgdt3306a_state *state = fe->demodulator_priv;
u32 tmp;
*ber = 0;
#if 1
/* FGR - BUGBUG - I don't know what value is expected by dvb_core
* what is the scale of the value?? */
tmp = read_reg(state, 0x00FC); /* NBERVALUE[24-31] */
tmp = (tmp << 8) | read_reg(state, 0x00FD); /* NBERVALUE[16-23] */
tmp = (tmp << 8) | read_reg(state, 0x00FE); /* NBERVALUE[8-15] */
tmp = (tmp << 8) | read_reg(state, 0x00FF); /* NBERVALUE[0-7] */
*ber = tmp;
lg_dbg("ber=%u\n", tmp);
#endif
return 0;
}
static int lgdt3306a_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
struct lgdt3306a_state *state = fe->demodulator_priv;
*ucblocks = 0;
#if 1
/* FGR - BUGBUG - I don't know what value is expected by dvb_core
* what happens when value wraps? */
*ucblocks = read_reg(state, 0x00F4); /* TPIFTPERRCNT[0-7] */
lg_dbg("ucblocks=%u\n", *ucblocks);
#endif
return 0;
}
static int lgdt3306a_tune(struct dvb_frontend *fe, bool re_tune, unsigned int mode_flags, unsigned int *delay, fe_status_t *status)
{
int ret = 0;
struct lgdt3306a_state *state = fe->demodulator_priv;
lg_dbg("re_tune=%u\n", re_tune);
if (re_tune) {
state->current_frequency = -1; /* force re-tune */
ret = lgdt3306a_set_parameters(fe);
if (ret != 0)
return ret;
}
*delay = 125;
ret = lgdt3306a_read_status(fe, status);
return ret;
}
static int lgdt3306a_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings
*fe_tune_settings)
{
fe_tune_settings->min_delay_ms = 100;
lg_dbg("\n");
return 0;
}
static int lgdt3306a_search(struct dvb_frontend *fe)
{
fe_status_t status = 0;
int i, ret;
/* set frontend */
ret = lgdt3306a_set_parameters(fe);
if (ret)
goto error;
/* wait frontend lock */
for (i = 20; i > 0; i--) {
lg_dbg(": loop=%d\n", i);
msleep(50);
ret = lgdt3306a_read_status(fe, &status);
if (ret)
goto error;
if (status & FE_HAS_LOCK)
break;
}
/* check if we have a valid signal */
if (status & FE_HAS_LOCK)
return DVBFE_ALGO_SEARCH_SUCCESS;
else
return DVBFE_ALGO_SEARCH_AGAIN;
error:
lg_dbg("failed (%d)\n", ret);
return DVBFE_ALGO_SEARCH_ERROR;
}
static void lgdt3306a_release(struct dvb_frontend *fe)
{
struct lgdt3306a_state *state = fe->demodulator_priv;
lg_dbg("\n");
kfree(state);
}
static struct dvb_frontend_ops lgdt3306a_ops;
struct dvb_frontend *lgdt3306a_attach(const struct lgdt3306a_config *config,
struct i2c_adapter *i2c_adap)
{
struct lgdt3306a_state *state = NULL;
int ret;
u8 val;
lg_dbg("(%d-%04x)\n",
i2c_adap ? i2c_adapter_id(i2c_adap) : 0,
config ? config->i2c_addr : 0);
state = kzalloc(sizeof(struct lgdt3306a_state), GFP_KERNEL);
if (state == NULL)
goto fail;
state->cfg = config;
state->i2c_adap = i2c_adap;
memcpy(&state->frontend.ops, &lgdt3306a_ops,
sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
/* verify that we're talking to a lg3306a */
/* FGR - NOTE - there is no obvious ChipId to check; we check
* some "known" bits after reset, but it's still just a guess */
ret = lgdt3306a_read_reg(state, 0x0000, &val);
if (lg_chkerr(ret))
goto fail;
if ((val & 0x74) != 0x74) {
lg_warn("expected 0x74, got 0x%x\n", (val & 0x74));
#if 0
goto fail; /* BUGBUG - re-enable when we know this is right */
#endif
}
ret = lgdt3306a_read_reg(state, 0x0001, &val);
if (lg_chkerr(ret))
goto fail;
if ((val & 0xF6) != 0xC6) {
lg_warn("expected 0xC6, got 0x%x\n", (val & 0xF6));
#if 0
goto fail; /* BUGBUG - re-enable when we know this is right */
#endif
}
ret = lgdt3306a_read_reg(state, 0x0002, &val);
if (lg_chkerr(ret))
goto fail;
if ((val & 0x73) != 0x03) {
lg_warn("expected 0x03, got 0x%x\n", (val & 0x73));
#if 0
goto fail; /* BUGBUG - re-enable when we know this is right */
#endif
}
state->current_frequency = -1;
state->current_modulation = -1;
lgdt3306a_sleep(state);
return &state->frontend;
fail:
lg_warn("unable to detect LGDT3306A hardware\n");
kfree(state);
return NULL;
}
EXPORT_SYMBOL(lgdt3306a_attach);
#ifdef DBG_DUMP
static const short regtab[] = {
0x0000, //SOFTRSTB 1'b1 1'b1 1'b1 ADCPDB 1'b1 PLLPDB GBBPDB 11111111
0x0001, //1'b1 1'b1 1'b0 1'b0 AUTORPTRS
0x0002, //NI2CRPTEN 1'b0 1'b0 1'b0 SPECINVAUT
0x0003, //AGCRFOUT
0x0004, //ADCSEL1V ADCCNT ADCCNF ADCCNS ADCCLKPLL
0x0005, //PLLINDIVSE
0x0006, //PLLCTRL[7:0] 11100001
0x0007, //SYSINITWAITTIME[7:0] (msec) 00001000
0x0008, //STDOPMODE[7:0] 10000000
0x0009, //1'b0 1'b0 1'b0 STDOPDETTMODE[2:0] STDOPDETCMODE[1:0] 00011110
0x000A, //DAFTEN 1'b1 x x SCSYSLOCK
0x000B, //SCSYSLOCKCHKTIME[7:0] (10msec) 01100100
0x000D, //x SAMPLING4
0x000E, //SAMFREQ[15:8] 00000000
0x000F, //SAMFREQ[7:0] 00000000
0x0010, //IFFREQ[15:8] 01100000
0x0011, //IFFREQ[7:0] 00000000
0x0012, //AGCEN AGCREFMO
0x0013, //AGCRFFIXB AGCIFFIXB AGCLOCKDETRNGSEL[1:0] 1'b1 1'b0 1'b0 1'b0 11101000
0x0014, //AGCFIXVALUE[7:0] 01111111
0x0015, //AGCREF[15:8] 00001010
0x0016, //AGCREF[7:0] 11100100
0x0017, //AGCDELAY[7:0] 00100000
0x0018, //AGCRFBW[3:0] AGCIFBW[3:0] 10001000
0x0019, //AGCUDOUTMODE[1:0] AGCUDCTRLLEN[1:0] AGCUDCTRL
0x001C, //1'b1 PFEN MFEN AICCVSYNC
0x001D, //1'b0 1'b1 1'b0 1'b1 AICCVSYNC
0x001E, //AICCALPHA[3:0] 1'b1 1'b0 1'b1 1'b0 01111010
0x001F, //AICCDETTH[19:16] AICCOFFTH[19:16] 00000000
0x0020, //AICCDETTH[15:8] 01111100
0x0021, //AICCDETTH[7:0] 00000000
0x0022, //AICCOFFTH[15:8] 00000101
0x0023, //AICCOFFTH[7:0] 11100000
0x0024, //AICCOPMODE3[1:0] AICCOPMODE2[1:0] AICCOPMODE1[1:0] AICCOPMODE0[1:0] 00000000
0x0025, //AICCFIXFREQ3[23:16] 00000000
0x0026, //AICCFIXFREQ3[15:8] 00000000
0x0027, //AICCFIXFREQ3[7:0] 00000000
0x0028, //AICCFIXFREQ2[23:16] 00000000
0x0029, //AICCFIXFREQ2[15:8] 00000000
0x002A, //AICCFIXFREQ2[7:0] 00000000
0x002B, //AICCFIXFREQ1[23:16] 00000000
0x002C, //AICCFIXFREQ1[15:8] 00000000
0x002D, //AICCFIXFREQ1[7:0] 00000000
0x002E, //AICCFIXFREQ0[23:16] 00000000
0x002F, //AICCFIXFREQ0[15:8] 00000000
0x0030, //AICCFIXFREQ0[7:0] 00000000
0x0031, //1'b0 1'b1 1'b0 1'b0 x DAGC1STER
0x0032, //DAGC1STEN DAGC1STER
0x0033, //DAGC1STREF[15:8] 00001010
0x0034, //DAGC1STREF[7:0] 11100100
0x0035, //DAGC2NDE
0x0036, //DAGC2NDREF[15:8] 00001010
0x0037, //DAGC2NDREF[7:0] 10000000
0x0038, //DAGC2NDLOCKDETRNGSEL[1:0]
0x003D, //1'b1 SAMGEARS
0x0040, //SAMLFGMA
0x0041, //SAMLFBWM
0x0044, //1'b1 CRGEARSHE
0x0045, //CRLFGMAN
0x0046, //CFLFBWMA
0x0047, //CRLFGMAN
0x0048, //x x x x CRLFGSTEP_VS[3:0] xxxx1001
0x0049, //CRLFBWMA
0x004A, //CRLFBWMA
0x0050, //1'b0 1'b1 1'b1 1'b0 MSECALCDA
0x0070, //TPOUTEN TPIFEN TPCLKOUTE
0x0071, //TPSENB TPSSOPBITE
0x0073, //TP47HINS x x CHBERINT PERMODE[1:0] PERINT[1:0] 1xx11100
0x0075, //x x x x x IQSWAPCTRL[2:0] xxxxx000
0x0076, //NBERCON NBERST NBERPOL NBERWSYN
0x0077, //x NBERLOSTTH[2:0] NBERACQTH[3:0] x0000000
0x0078, //NBERPOLY[31:24] 00000000
0x0079, //NBERPOLY[23:16] 00000000
0x007A, //NBERPOLY[15:8] 00000000
0x007B, //NBERPOLY[7:0] 00000000
0x007C, //NBERPED[31:24] 00000000
0x007D, //NBERPED[23:16] 00000000
0x007E, //NBERPED[15:8] 00000000
0x007F, //NBERPED[7:0] 00000000
0x0080, //x AGCLOCK DAGCLOCK SYSLOCK x x NEVERLOCK[1:0]
0x0085, //SPECINVST
0x0088, //SYSLOCKTIME[15:8]
0x0089, //SYSLOCKTIME[7:0]
0x008C, //FECLOCKTIME[15:8]
0x008D, //FECLOCKTIME[7:0]
0x008E, //AGCACCOUT[15:8]
0x008F, //AGCACCOUT[7:0]
0x0090, //AICCREJSTATUS[3:0] AICCREJBUSY[3:0]
0x0091, //AICCVSYNC
0x009C, //CARRFREQOFFSET[15:8]
0x009D, //CARRFREQOFFSET[7:0]
0x00A1, //SAMFREQOFFSET[23:16]
0x00A2, //SAMFREQOFFSET[15:8]
0x00A3, //SAMFREQOFFSET[7:0]
0x00A6, //SYNCLOCK SYNCLOCKH
#if 0//covered elsewhere
0x00E8, //CONSTPWR[15:8]
0x00E9, //CONSTPWR[7:0]
0x00EA, //BMSE[15:8]
0x00EB, //BMSE[7:0]
0x00EC, //MSE[15:8]
0x00ED, //MSE[7:0]
0x00EE, //CONSTI[7:0]
0x00EF, //CONSTQ[7:0]
#endif
0x00F4, //TPIFTPERRCNT[7:0]
0x00F5, //TPCORREC
0x00F6, //VBBER[15:8]
0x00F7, //VBBER[7:0]
0x00F8, //VABER[15:8]
0x00F9, //VABER[7:0]
0x00FA, //TPERRCNT[7:0]
0x00FB, //NBERLOCK x x x x x x x
0x00FC, //NBERVALUE[31:24]
0x00FD, //NBERVALUE[23:16]
0x00FE, //NBERVALUE[15:8]
0x00FF, //NBERVALUE[7:0]
0x1000, //1'b0 WODAGCOU
0x1005, //x x 1'b1 1'b1 x SRD_Q_QM
0x1009, //SRDWAITTIME[7:0] (10msec) 00100011
0x100A, //SRDWAITTIME_CQS[7:0] (msec) 01100100
0x101A, //x 1'b1 1'b0 1'b0 x QMDQAMMODE[2:0] x100x010
0x1036, //1'b0 1'b1 1'b0 1'b0 SAMGSEND_CQS[3:0] 01001110
0x103C, //SAMGSAUTOSTL_V[3:0] SAMGSAUTOEDL_V[3:0] 01000110
0x103D, //1'b1 1'b1 SAMCNORMBP_V[1:0] 1'b0 1'b0 SAMMODESEL_V[1:0] 11100001
0x103F, //SAMZTEDSE
0x105D, //EQSTATUSE
0x105F, //x PMAPG2_V[2:0] x DMAPG2_V[2:0] x001x011
0x1060, //1'b1 EQSTATUSE
0x1061, //CRMAPBWSTL_V[3:0] CRMAPBWEDL_V[3:0] 00000100
0x1065, //1'b0 x CRMODE_V[1:0] 1'b1 x 1'b1 x 0x111x1x
0x1066, //1'b0 1'b0 1'b1 1'b0 1'b1 PNBOOSTSE
0x1068, //CREPHNGAIN2_V[3:0] CREPHNPBW_V[3:0] 10010001
0x106E, //x x x x x CREPHNEN_
0x106F, //CREPHNTH_V[7:0] 00010101
0x1072, //CRSWEEPN
0x1073, //CRPGAIN_V[3:0] x x 1'b1 1'b1 1001xx11
0x1074, //CRPBW_V[3:0] x x 1'b1 1'b1 0001xx11
0x1080, //DAFTSTATUS[1:0] x x x x x x
0x1081, //SRDSTATUS[1:0] x x x x x SRDLOCK
0x10A9, //EQSTATUS_CQS[1:0] x x x x x x
0x10B7, //EQSTATUS_V[1:0] x x x x x x
#if 0//SMART_ANT
0x1F00, //MODEDETE
0x1F01, //x x x x x x x SFNRST xxxxxxx0
0x1F03, //NUMOFANT[7:0] 10000000
0x1F04, //x SELMASK[6:0] x0000000
0x1F05, //x SETMASK[6:0] x0000000
0x1F06, //x TXDATA[6:0] x0000000
0x1F07, //x CHNUMBER[6:0] x0000000
0x1F09, //AGCTIME[23:16] 10011000
0x1F0A, //AGCTIME[15:8] 10010110
0x1F0B, //AGCTIME[7:0] 10000000
0x1F0C, //ANTTIME[31:24] 00000000
0x1F0D, //ANTTIME[23:16] 00000011
0x1F0E, //ANTTIME[15:8] 10010000
0x1F0F, //ANTTIME[7:0] 10010000
0x1F11, //SYNCTIME[23:16] 10011000
0x1F12, //SYNCTIME[15:8] 10010110
0x1F13, //SYNCTIME[7:0] 10000000
0x1F14, //SNRTIME[31:24] 00000001
0x1F15, //SNRTIME[23:16] 01111101
0x1F16, //SNRTIME[15:8] 01111000
0x1F17, //SNRTIME[7:0] 01000000
0x1F19, //FECTIME[23:16] 00000000
0x1F1A, //FECTIME[15:8] 01110010
0x1F1B, //FECTIME[7:0] 01110000
0x1F1D, //FECTHD[7:0] 00000011
0x1F1F, //SNRTHD[23:16] 00001000
0x1F20, //SNRTHD[15:8] 01111111
0x1F21, //SNRTHD[7:0] 10000101
0x1F80, //IRQFLG x x SFSDRFLG MODEBFLG SAVEFLG SCANFLG TRACKFLG
0x1F81, //x SYNCCON SNRCON FECCON x STDBUSY SYNCRST AGCFZCO
0x1F82, //x x x SCANOPCD[4:0]
0x1F83, //x x x x MAINOPCD[3:0]
0x1F84, //x x RXDATA[13:8]
0x1F85, //RXDATA[7:0]
0x1F86, //x x SDTDATA[13:8]
0x1F87, //SDTDATA[7:0]
0x1F89, //ANTSNR[23:16]
0x1F8A, //ANTSNR[15:8]
0x1F8B, //ANTSNR[7:0]
0x1F8C, //x x x x ANTFEC[13:8]
0x1F8D, //ANTFEC[7:0]
0x1F8E, //MAXCNT[7:0]
0x1F8F, //SCANCNT[7:0]
0x1F91, //MAXPW[23:16]
0x1F92, //MAXPW[15:8]
0x1F93, //MAXPW[7:0]
0x1F95, //CURPWMSE[23:16]
0x1F96, //CURPWMSE[15:8]
0x1F97, //CURPWMSE[7:0]
#endif//SMART_ANT
0x211F, //1'b1 1'b1 1'b1 CIRQEN x x 1'b0 1'b0 1111xx00
0x212A, //EQAUTOST
0x2122, //CHFAST[7:0] 01100000
0x212B, //FFFSTEP_V[3:0] x FBFSTEP_V[2:0] 0001x001
0x212C, //PHDEROTBWSEL[3:0] 1'b1 1'b1 1'b1 1'b0 10001110
0x212D, //1'b1 1'b1 1'b1 1'b1 x x TPIFLOCKS
0x2135, //DYNTRACKFDEQ[3:0] x 1'b0 1'b0 1'b0 1010x000
0x2141, //TRMODE[1:0] 1'b1 1'b1 1'b0 1'b1 1'b1 1'b1 01110111
0x2162, //AICCCTRLE
0x2173, //PHNCNFCNT[7:0] 00000100
0x2179, //1'b0 1'b0 1'b0 1'b1 x BADSINGLEDYNTRACKFBF[2:0] 0001x001
0x217A, //1'b0 1'b0 1'b0 1'b1 x BADSLOWSINGLEDYNTRACKFBF[2:0] 0001x001
0x217E, //CNFCNTTPIF[7:0] 00001000
0x217F, //TPERRCNTTPIF[7:0] 00000001
0x2180, //x x x x x x FBDLYCIR[9:8]
0x2181, //FBDLYCIR[7:0]
0x2185, //MAXPWRMAIN[7:0]
0x2191, //NCOMBDET x x x x x x x
0x2199, //x MAINSTRON
0x219A, //FFFEQSTEPOUT_V[3:0] FBFSTEPOUT_V[2:0]
0x21A1, //x x SNRREF[5:0]
0x2845, //1'b0 1'b1 x x FFFSTEP_CQS[1:0] FFFCENTERTAP[1:0] 01xx1110
0x2846, //1'b0 x 1'b0 1'b1 FBFSTEP_CQS[1:0] 1'b1 1'b0 0x011110
0x2847, //ENNOSIGDE
0x2849, //1'b1 1'b1 NOUSENOSI
0x284A, //EQINITWAITTIME[7:0] 01100100
0x3000, //1'b1 1'b1 1'b1 x x x 1'b0 RPTRSTM
0x3001, //RPTRSTWAITTIME[7:0] (100msec) 00110010
0x3031, //FRAMELOC
0x3032, //1'b1 1'b0 1'b0 1'b0 x x FRAMELOCKMODE_CQS[1:0] 1000xx11
0x30A9, //VDLOCK_Q FRAMELOCK
0x30AA, //MPEGLOCK
};
#define numDumpRegs (sizeof(regtab)/sizeof(regtab[0]))
static u8 regval1[numDumpRegs] = {0, };
static u8 regval2[numDumpRegs] = {0, };
static void lgdt3306a_DumpAllRegs(struct lgdt3306a_state *state)
{
memset(regval2, 0xff, sizeof(regval2));
lgdt3306a_DumpRegs(state);
}
static void lgdt3306a_DumpRegs(struct lgdt3306a_state *state)
{
int i;
int sav_debug = debug;
if ((debug & DBG_DUMP) == 0)
return;
debug &= ~DBG_REG; /* supress DBG_REG during reg dump */
lg_info("\n");
for (i = 0; i < numDumpRegs; i++) {
lgdt3306a_read_reg(state, regtab[i], &regval1[i]);
if (regval1[i] != regval2[i]) {
lg_info(" %04X = %02X\n", regtab[i], regval1[i]);
regval2[i] = regval1[i];
}
}
debug = sav_debug;
}
#endif /* DBG_DUMP */
static struct dvb_frontend_ops lgdt3306a_ops = {
.delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
.info = {
.name = "LG Electronics LGDT3306A VSB/QAM Frontend",
#if 0
.type = FE_ATSC,
#endif
.frequency_min = 54000000,
.frequency_max = 858000000,
.frequency_stepsize = 62500,
.caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
},
.i2c_gate_ctrl = lgdt3306a_i2c_gate_ctrl,
.init = lgdt3306a_init,
.sleep = lgdt3306a_fe_sleep,
/* if this is set, it overrides the default swzigzag */
.tune = lgdt3306a_tune,
.set_frontend = lgdt3306a_set_parameters,
.get_frontend = lgdt3306a_get_frontend,
.get_frontend_algo = lgdt3306a_get_frontend_algo,
.get_tune_settings = lgdt3306a_get_tune_settings,
.read_status = lgdt3306a_read_status,
.read_ber = lgdt3306a_read_ber,
.read_signal_strength = lgdt3306a_read_signal_strength,
.read_snr = lgdt3306a_read_snr,
.read_ucblocks = lgdt3306a_read_ucblocks,
.release = lgdt3306a_release,
.ts_bus_ctrl = lgdt3306a_ts_bus_ctrl,
.search = lgdt3306a_search,
};
MODULE_DESCRIPTION("LG Electronics LGDT3306A ATSC/QAM-B Demodulator Driver");
MODULE_AUTHOR("Fred Richter <frichter@hauppauge.com>");
MODULE_LICENSE("GPL");
MODULE_VERSION("0.2");
/*
* Local variables:
* c-basic-offset: 8
* End:
*/
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