mirror of https://gitee.com/openkylin/linux.git
530 lines
14 KiB
C
530 lines
14 KiB
C
/*
|
|
TDA10021 - Single Chip Cable Channel Receiver driver module
|
|
used on the Siemens DVB-C cards
|
|
|
|
Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
|
|
Copyright (C) 2004 Markus Schulz <msc@antzsystem.de>
|
|
Support for TDA10021
|
|
|
|
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 <linux/delay.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "dvb_frontend.h"
|
|
#include "tda1002x.h"
|
|
|
|
|
|
struct tda10021_state {
|
|
struct i2c_adapter* i2c;
|
|
/* configuration settings */
|
|
const struct tda1002x_config* config;
|
|
struct dvb_frontend frontend;
|
|
|
|
u8 pwm;
|
|
u8 reg0;
|
|
};
|
|
|
|
|
|
#if 0
|
|
#define dprintk(x...) printk(x)
|
|
#else
|
|
#define dprintk(x...)
|
|
#endif
|
|
|
|
static int verbose;
|
|
|
|
#define XIN 57840000UL
|
|
|
|
#define FIN (XIN >> 4)
|
|
|
|
static int tda10021_inittab_size = 0x40;
|
|
static u8 tda10021_inittab[0x40]=
|
|
{
|
|
0x73, 0x6a, 0x23, 0x0a, 0x02, 0x37, 0x77, 0x1a,
|
|
0x37, 0x6a, 0x17, 0x8a, 0x1e, 0x86, 0x43, 0x40,
|
|
0xb8, 0x3f, 0xa1, 0x00, 0xcd, 0x01, 0x00, 0xff,
|
|
0x11, 0x00, 0x7c, 0x31, 0x30, 0x20, 0x00, 0x00,
|
|
0x02, 0x00, 0x00, 0x7d, 0x00, 0x00, 0x00, 0x00,
|
|
0x07, 0x00, 0x33, 0x11, 0x0d, 0x95, 0x08, 0x58,
|
|
0x00, 0x00, 0x80, 0x00, 0x80, 0xff, 0x00, 0x00,
|
|
0x04, 0x2d, 0x2f, 0xff, 0x00, 0x00, 0x00, 0x00,
|
|
};
|
|
|
|
static int _tda10021_writereg (struct tda10021_state* state, u8 reg, u8 data)
|
|
{
|
|
u8 buf[] = { reg, data };
|
|
struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
|
|
int ret;
|
|
|
|
ret = i2c_transfer (state->i2c, &msg, 1);
|
|
if (ret != 1)
|
|
printk("DVB: TDA10021(%d): %s, writereg error "
|
|
"(reg == 0x%02x, val == 0x%02x, ret == %i)\n",
|
|
state->frontend.dvb->num, __func__, reg, data, ret);
|
|
|
|
msleep(10);
|
|
return (ret != 1) ? -EREMOTEIO : 0;
|
|
}
|
|
|
|
static u8 tda10021_readreg (struct tda10021_state* state, u8 reg)
|
|
{
|
|
u8 b0 [] = { reg };
|
|
u8 b1 [] = { 0 };
|
|
struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
|
|
{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
|
|
int ret;
|
|
|
|
ret = i2c_transfer (state->i2c, msg, 2);
|
|
// Don't print an error message if the id is read.
|
|
if (ret != 2 && reg != 0x1a)
|
|
printk("DVB: TDA10021: %s: readreg error (ret == %i)\n",
|
|
__func__, ret);
|
|
return b1[0];
|
|
}
|
|
|
|
//get access to tuner
|
|
static int lock_tuner(struct tda10021_state* state)
|
|
{
|
|
u8 buf[2] = { 0x0f, tda10021_inittab[0x0f] | 0x80 };
|
|
struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
|
|
|
|
if(i2c_transfer(state->i2c, &msg, 1) != 1)
|
|
{
|
|
printk("tda10021: lock tuner fails\n");
|
|
return -EREMOTEIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
//release access from tuner
|
|
static int unlock_tuner(struct tda10021_state* state)
|
|
{
|
|
u8 buf[2] = { 0x0f, tda10021_inittab[0x0f] & 0x7f };
|
|
struct i2c_msg msg_post={.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
|
|
|
|
if(i2c_transfer(state->i2c, &msg_post, 1) != 1)
|
|
{
|
|
printk("tda10021: unlock tuner fails\n");
|
|
return -EREMOTEIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_setup_reg0 (struct tda10021_state* state, u8 reg0,
|
|
fe_spectral_inversion_t inversion)
|
|
{
|
|
reg0 |= state->reg0 & 0x63;
|
|
|
|
if ((INVERSION_ON == inversion) ^ (state->config->invert == 0))
|
|
reg0 &= ~0x20;
|
|
else
|
|
reg0 |= 0x20;
|
|
|
|
_tda10021_writereg (state, 0x00, reg0 & 0xfe);
|
|
_tda10021_writereg (state, 0x00, reg0 | 0x01);
|
|
|
|
state->reg0 = reg0;
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_set_symbolrate (struct tda10021_state* state, u32 symbolrate)
|
|
{
|
|
s32 BDR;
|
|
s32 BDRI;
|
|
s16 SFIL=0;
|
|
u16 NDEC = 0;
|
|
u32 tmp, ratio;
|
|
|
|
if (symbolrate > XIN/2)
|
|
symbolrate = XIN/2;
|
|
if (symbolrate < 500000)
|
|
symbolrate = 500000;
|
|
|
|
if (symbolrate < XIN/16) NDEC = 1;
|
|
if (symbolrate < XIN/32) NDEC = 2;
|
|
if (symbolrate < XIN/64) NDEC = 3;
|
|
|
|
if (symbolrate < (u32)(XIN/12.3)) SFIL = 1;
|
|
if (symbolrate < (u32)(XIN/16)) SFIL = 0;
|
|
if (symbolrate < (u32)(XIN/24.6)) SFIL = 1;
|
|
if (symbolrate < (u32)(XIN/32)) SFIL = 0;
|
|
if (symbolrate < (u32)(XIN/49.2)) SFIL = 1;
|
|
if (symbolrate < (u32)(XIN/64)) SFIL = 0;
|
|
if (symbolrate < (u32)(XIN/98.4)) SFIL = 1;
|
|
|
|
symbolrate <<= NDEC;
|
|
ratio = (symbolrate << 4) / FIN;
|
|
tmp = ((symbolrate << 4) % FIN) << 8;
|
|
ratio = (ratio << 8) + tmp / FIN;
|
|
tmp = (tmp % FIN) << 8;
|
|
ratio = (ratio << 8) + DIV_ROUND_CLOSEST(tmp, FIN);
|
|
|
|
BDR = ratio;
|
|
BDRI = (((XIN << 5) / symbolrate) + 1) / 2;
|
|
|
|
if (BDRI > 0xFF)
|
|
BDRI = 0xFF;
|
|
|
|
SFIL = (SFIL << 4) | tda10021_inittab[0x0E];
|
|
|
|
NDEC = (NDEC << 6) | tda10021_inittab[0x03];
|
|
|
|
_tda10021_writereg (state, 0x03, NDEC);
|
|
_tda10021_writereg (state, 0x0a, BDR&0xff);
|
|
_tda10021_writereg (state, 0x0b, (BDR>> 8)&0xff);
|
|
_tda10021_writereg (state, 0x0c, (BDR>>16)&0x3f);
|
|
|
|
_tda10021_writereg (state, 0x0d, BDRI);
|
|
_tda10021_writereg (state, 0x0e, SFIL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_init (struct dvb_frontend *fe)
|
|
{
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
int i;
|
|
|
|
dprintk("DVB: TDA10021(%d): init chip\n", fe->adapter->num);
|
|
|
|
//_tda10021_writereg (fe, 0, 0);
|
|
|
|
for (i=0; i<tda10021_inittab_size; i++)
|
|
_tda10021_writereg (state, i, tda10021_inittab[i]);
|
|
|
|
_tda10021_writereg (state, 0x34, state->pwm);
|
|
|
|
//Comment by markus
|
|
//0x2A[3-0] == PDIV -> P multiplaying factor (P=PDIV+1)(default 0)
|
|
//0x2A[4] == BYPPLL -> Power down mode (default 1)
|
|
//0x2A[5] == LCK -> PLL Lock Flag
|
|
//0x2A[6] == POLAXIN -> Polarity of the input reference clock (default 0)
|
|
|
|
//Activate PLL
|
|
_tda10021_writereg(state, 0x2a, tda10021_inittab[0x2a] & 0xef);
|
|
return 0;
|
|
}
|
|
|
|
struct qam_params {
|
|
u8 conf, agcref, lthr, mseth, aref;
|
|
};
|
|
|
|
static int tda10021_set_parameters(struct dvb_frontend *fe)
|
|
{
|
|
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
|
|
u32 delsys = c->delivery_system;
|
|
unsigned qam = c->modulation;
|
|
bool is_annex_c;
|
|
u32 reg0x3d;
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
static const struct qam_params qam_params[] = {
|
|
/* Modulation Conf AGCref LTHR MSETH AREF */
|
|
[QPSK] = { 0x14, 0x78, 0x78, 0x8c, 0x96 },
|
|
[QAM_16] = { 0x00, 0x8c, 0x87, 0xa2, 0x91 },
|
|
[QAM_32] = { 0x04, 0x8c, 0x64, 0x74, 0x96 },
|
|
[QAM_64] = { 0x08, 0x6a, 0x46, 0x43, 0x6a },
|
|
[QAM_128] = { 0x0c, 0x78, 0x36, 0x34, 0x7e },
|
|
[QAM_256] = { 0x10, 0x5c, 0x26, 0x23, 0x6b },
|
|
};
|
|
|
|
switch (delsys) {
|
|
case SYS_DVBC_ANNEX_A:
|
|
is_annex_c = false;
|
|
break;
|
|
case SYS_DVBC_ANNEX_C:
|
|
is_annex_c = true;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* gcc optimizes the code bellow the same way as it would code:
|
|
* "if (qam > 5) return -EINVAL;"
|
|
* Yet, the code is clearer, as it shows what QAM standards are
|
|
* supported by the driver, and avoids the usage of magic numbers on
|
|
* it.
|
|
*/
|
|
switch (qam) {
|
|
case QPSK:
|
|
case QAM_16:
|
|
case QAM_32:
|
|
case QAM_64:
|
|
case QAM_128:
|
|
case QAM_256:
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (c->inversion != INVERSION_ON && c->inversion != INVERSION_OFF)
|
|
return -EINVAL;
|
|
|
|
/*printk("tda10021: set frequency to %d qam=%d symrate=%d\n", p->frequency,qam,p->symbol_rate);*/
|
|
|
|
if (fe->ops.tuner_ops.set_params) {
|
|
fe->ops.tuner_ops.set_params(fe);
|
|
if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
|
|
}
|
|
|
|
tda10021_set_symbolrate(state, c->symbol_rate);
|
|
_tda10021_writereg(state, 0x34, state->pwm);
|
|
|
|
_tda10021_writereg(state, 0x01, qam_params[qam].agcref);
|
|
_tda10021_writereg(state, 0x05, qam_params[qam].lthr);
|
|
_tda10021_writereg(state, 0x08, qam_params[qam].mseth);
|
|
_tda10021_writereg(state, 0x09, qam_params[qam].aref);
|
|
|
|
/*
|
|
* Bit 0 == 0 means roll-off = 0.15 (Annex A)
|
|
* == 1 means roll-off = 0.13 (Annex C)
|
|
*/
|
|
reg0x3d = tda10021_readreg (state, 0x3d);
|
|
if (is_annex_c)
|
|
_tda10021_writereg (state, 0x3d, 0x01 | reg0x3d);
|
|
else
|
|
_tda10021_writereg (state, 0x3d, 0xfe & reg0x3d);
|
|
tda10021_setup_reg0(state, qam_params[qam].conf, c->inversion);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_read_status(struct dvb_frontend* fe, fe_status_t* status)
|
|
{
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
int sync;
|
|
|
|
*status = 0;
|
|
//0x11[0] == EQALGO -> Equalizer algorithms state
|
|
//0x11[1] == CARLOCK -> Carrier locked
|
|
//0x11[2] == FSYNC -> Frame synchronisation
|
|
//0x11[3] == FEL -> Front End locked
|
|
//0x11[6] == NODVB -> DVB Mode Information
|
|
sync = tda10021_readreg (state, 0x11);
|
|
|
|
if (sync & 2)
|
|
*status |= FE_HAS_SIGNAL|FE_HAS_CARRIER;
|
|
|
|
if (sync & 4)
|
|
*status |= FE_HAS_SYNC|FE_HAS_VITERBI;
|
|
|
|
if (sync & 8)
|
|
*status |= FE_HAS_LOCK;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_read_ber(struct dvb_frontend* fe, u32* ber)
|
|
{
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
|
|
u32 _ber = tda10021_readreg(state, 0x14) |
|
|
(tda10021_readreg(state, 0x15) << 8) |
|
|
((tda10021_readreg(state, 0x16) & 0x0f) << 16);
|
|
_tda10021_writereg(state, 0x10, (tda10021_readreg(state, 0x10) & ~0xc0)
|
|
| (tda10021_inittab[0x10] & 0xc0));
|
|
*ber = 10 * _ber;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_read_signal_strength(struct dvb_frontend* fe, u16* strength)
|
|
{
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
|
|
u8 config = tda10021_readreg(state, 0x02);
|
|
u8 gain = tda10021_readreg(state, 0x17);
|
|
if (config & 0x02)
|
|
/* the agc value is inverted */
|
|
gain = ~gain;
|
|
*strength = (gain << 8) | gain;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_read_snr(struct dvb_frontend* fe, u16* snr)
|
|
{
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
|
|
u8 quality = ~tda10021_readreg(state, 0x18);
|
|
*snr = (quality << 8) | quality;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
|
|
{
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
|
|
*ucblocks = tda10021_readreg (state, 0x13) & 0x7f;
|
|
if (*ucblocks == 0x7f)
|
|
*ucblocks = 0xffffffff;
|
|
|
|
/* reset uncorrected block counter */
|
|
_tda10021_writereg (state, 0x10, tda10021_inittab[0x10] & 0xdf);
|
|
_tda10021_writereg (state, 0x10, tda10021_inittab[0x10]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_get_frontend(struct dvb_frontend *fe)
|
|
{
|
|
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
int sync;
|
|
s8 afc = 0;
|
|
|
|
sync = tda10021_readreg(state, 0x11);
|
|
afc = tda10021_readreg(state, 0x19);
|
|
if (verbose) {
|
|
/* AFC only valid when carrier has been recovered */
|
|
printk(sync & 2 ? "DVB: TDA10021(%d): AFC (%d) %dHz\n" :
|
|
"DVB: TDA10021(%d): [AFC (%d) %dHz]\n",
|
|
state->frontend.dvb->num, afc,
|
|
-((s32)p->symbol_rate * afc) >> 10);
|
|
}
|
|
|
|
p->inversion = ((state->reg0 & 0x20) == 0x20) ^ (state->config->invert != 0) ? INVERSION_ON : INVERSION_OFF;
|
|
p->modulation = ((state->reg0 >> 2) & 7) + QAM_16;
|
|
|
|
p->fec_inner = FEC_NONE;
|
|
p->frequency = ((p->frequency + 31250) / 62500) * 62500;
|
|
|
|
if (sync & 2)
|
|
p->frequency -= ((s32)p->symbol_rate * afc) >> 10;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
|
|
{
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
|
|
if (enable) {
|
|
lock_tuner(state);
|
|
} else {
|
|
unlock_tuner(state);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int tda10021_sleep(struct dvb_frontend* fe)
|
|
{
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
|
|
_tda10021_writereg (state, 0x1b, 0x02); /* pdown ADC */
|
|
_tda10021_writereg (state, 0x00, 0x80); /* standby */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void tda10021_release(struct dvb_frontend* fe)
|
|
{
|
|
struct tda10021_state* state = fe->demodulator_priv;
|
|
kfree(state);
|
|
}
|
|
|
|
static struct dvb_frontend_ops tda10021_ops;
|
|
|
|
struct dvb_frontend* tda10021_attach(const struct tda1002x_config* config,
|
|
struct i2c_adapter* i2c,
|
|
u8 pwm)
|
|
{
|
|
struct tda10021_state* state = NULL;
|
|
u8 id;
|
|
|
|
/* allocate memory for the internal state */
|
|
state = kzalloc(sizeof(struct tda10021_state), GFP_KERNEL);
|
|
if (state == NULL) goto error;
|
|
|
|
/* setup the state */
|
|
state->config = config;
|
|
state->i2c = i2c;
|
|
state->pwm = pwm;
|
|
state->reg0 = tda10021_inittab[0];
|
|
|
|
/* check if the demod is there */
|
|
id = tda10021_readreg(state, 0x1a);
|
|
if ((id & 0xf0) != 0x70) goto error;
|
|
|
|
/* Don't claim TDA10023 */
|
|
if (id == 0x7d)
|
|
goto error;
|
|
|
|
printk("TDA10021: i2c-addr = 0x%02x, id = 0x%02x\n",
|
|
state->config->demod_address, id);
|
|
|
|
/* create dvb_frontend */
|
|
memcpy(&state->frontend.ops, &tda10021_ops, sizeof(struct dvb_frontend_ops));
|
|
state->frontend.demodulator_priv = state;
|
|
return &state->frontend;
|
|
|
|
error:
|
|
kfree(state);
|
|
return NULL;
|
|
}
|
|
|
|
static struct dvb_frontend_ops tda10021_ops = {
|
|
.delsys = { SYS_DVBC_ANNEX_A, SYS_DVBC_ANNEX_C },
|
|
.info = {
|
|
.name = "Philips TDA10021 DVB-C",
|
|
.type = FE_QAM,
|
|
.frequency_stepsize = 62500,
|
|
.frequency_min = 47000000,
|
|
.frequency_max = 862000000,
|
|
.symbol_rate_min = (XIN/2)/64, /* SACLK/64 == (XIN/2)/64 */
|
|
.symbol_rate_max = (XIN/2)/4, /* SACLK/4 */
|
|
#if 0
|
|
.frequency_tolerance = ???,
|
|
.symbol_rate_tolerance = ???, /* ppm */ /* == 8% (spec p. 5) */
|
|
#endif
|
|
.caps = 0x400 | //FE_CAN_QAM_4
|
|
FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
|
|
FE_CAN_QAM_128 | FE_CAN_QAM_256 |
|
|
FE_CAN_FEC_AUTO
|
|
},
|
|
|
|
.release = tda10021_release,
|
|
|
|
.init = tda10021_init,
|
|
.sleep = tda10021_sleep,
|
|
.i2c_gate_ctrl = tda10021_i2c_gate_ctrl,
|
|
|
|
.set_frontend = tda10021_set_parameters,
|
|
.get_frontend = tda10021_get_frontend,
|
|
|
|
.read_status = tda10021_read_status,
|
|
.read_ber = tda10021_read_ber,
|
|
.read_signal_strength = tda10021_read_signal_strength,
|
|
.read_snr = tda10021_read_snr,
|
|
.read_ucblocks = tda10021_read_ucblocks,
|
|
};
|
|
|
|
module_param(verbose, int, 0644);
|
|
MODULE_PARM_DESC(verbose, "print AFC offset after tuning for debugging the PWM setting");
|
|
|
|
MODULE_DESCRIPTION("Philips TDA10021 DVB-C demodulator driver");
|
|
MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Markus Schulz");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
EXPORT_SYMBOL(tda10021_attach);
|