- 根目录:
- drivers
- media
- dvb-frontends
- tda8083.c
/*
Driver for Philips TDA8083 based QPSK Demodulator
Copyright (C) 2001 Convergence Integrated Media GmbH
written by Ralph Metzler <ralph@convergence.de>
adoption to the new DVB frontend API and diagnostic ioctl's
by Holger Waechtler <holger@convergence.de>
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/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include "dvb_frontend.h"
#include "tda8083.h"
struct tda8083_state {
struct i2c_adapter* i2c;
/* configuration settings */
const struct tda8083_config* config;
struct dvb_frontend frontend;
};
static int debug;
#define dprintk(args...) \
do { \
if (debug) printk(KERN_DEBUG "tda8083: " args); \
} while (0)
static u8 tda8083_init_tab [] = {
0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea,
0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10,
0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8,
0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00,
0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00
};
static int tda8083_writereg (struct tda8083_state* state, u8 reg, u8 data)
{
int ret;
u8 buf [] = { reg, data };
struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
ret = i2c_transfer(state->i2c, &msg, 1);
if (ret != 1)
dprintk ("%s: writereg error (reg %02x, ret == %i)\n",
__func__, reg, ret);
return (ret != 1) ? -1 : 0;
}
static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len)
{
int ret;
struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 },
{ .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
ret = i2c_transfer(state->i2c, msg, 2);
if (ret != 2)
dprintk ("%s: readreg error (reg %02x, ret == %i)\n",
__func__, reg1, ret);
return ret == 2 ? 0 : -1;
}
static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg)
{
u8 val;
tda8083_readregs (state, reg, &val, 1);
return val;
}
static int tda8083_set_inversion (struct tda8083_state* state, fe_spectral_inversion_t inversion)
{
/* XXX FIXME: implement other modes than FEC_AUTO */
if (inversion == INVERSION_AUTO)
return 0;
return -EINVAL;
}
static int tda8083_set_fec (struct tda8083_state* state, fe_code_rate_t fec)
{
if (fec == FEC_AUTO)
return tda8083_writereg (state, 0x07, 0xff);
if (fec >= FEC_1_2 && fec <= FEC_8_9)
return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec));
return -EINVAL;
}
static fe_code_rate_t tda8083_get_fec (struct tda8083_state* state)
{
u8 index;
static fe_code_rate_t fec_tab [] = { FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4,
FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8 };
index = tda8083_readreg(state, 0x0e) & 0x07;
return fec_tab [index];
}
static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate)
{
u32 ratio;
u32 tmp;
u8 filter;
if (srate > 32000000)
srate = 32000000;
if (srate < 500000)
srate = 500000;
filter = 0;
if (srate < 24000000)
filter = 2;
if (srate < 16000000)
filter = 3;
tmp = 31250 << 16;
ratio = tmp / srate;
tmp = (tmp % srate) << 8;
ratio = (ratio << 8) + tmp / srate;
tmp = (tmp % srate) << 8;
ratio = (ratio << 8) + tmp / srate;
dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio);
tda8083_writereg (state, 0x05, filter);
tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff);
tda8083_writereg (state, 0x03, (ratio >> 8) & 0xff);
tda8083_writereg (state, 0x04, (ratio ) & 0xff);
tda8083_writereg (state, 0x00, 0x3c);
tda8083_writereg (state, 0x00, 0x04);
return 1;
}
static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout)
{
unsigned long start = jiffies;
while (jiffies - start < timeout &&
!(tda8083_readreg(state, 0x02) & 0x80))
{
msleep(50);
}
}
static int tda8083_set_tone (struct tda8083_state* state, fe_sec_tone_mode_t tone)
{
tda8083_writereg (state, 0x26, 0xf1);
switch (tone) {
case SEC_TONE_OFF:
return tda8083_writereg (state, 0x29, 0x00);
case SEC_TONE_ON:
return tda8083_writereg (state, 0x29, 0x80);
default:
return -EINVAL;
}
}
static int tda8083_set_voltage (struct tda8083_state* state, fe_sec_voltage_t voltage)
{
switch (voltage) {
case SEC_VOLTAGE_13:
return tda8083_writereg (state, 0x20, 0x00);
case SEC_VOLTAGE_18:
return tda8083_writereg (state, 0x20, 0x11);
default:
return -EINVAL;
}
}
static int tda8083_send_diseqc_burst (struct tda8083_state* state, fe_sec_mini_cmd_t burst)
{
switch (burst) {
case SEC_MINI_A:
tda8083_writereg (state, 0x29, (5 << 2)); /* send burst A */
break;
case SEC_MINI_B:
tda8083_writereg (state, 0x29, (7 << 2)); /* send B */
break;
default:
return -EINVAL;
}
tda8083_wait_diseqc_fifo (state, 100);
return 0;
}
static int tda8083_send_diseqc_msg (struct dvb_frontend* fe,
struct dvb_diseqc_master_cmd *m)
{
struct tda8083_state* state = fe->demodulator_priv;
int i;
tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */
for (i=0; i<m->msg_len; i++)
tda8083_writereg (state, 0x23 + i, m->msg[i]);
tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */
tda8083_wait_diseqc_fifo (state, 100);
return 0;
}
static int tda8083_read_status(struct dvb_frontend* fe, fe_status_t* status)
{
struct tda8083_state* state = fe->demodulator_priv;
u8 signal = ~tda8083_readreg (state, 0x01);
u8 sync = tda8083_readreg (state, 0x02);
*status = 0;
if (signal > 10)
*status |= FE_HAS_SIGNAL;
if (sync & 0x01)
*status |= FE_HAS_CARRIER;
if (sync & 0x02)
*status |= FE_HAS_VITERBI;
if (sync & 0x10)
*status |= FE_HAS_SYNC;
if (sync & 0x20) /* frontend can not lock */
*status |= FE_TIMEDOUT;
if ((sync & 0x1f) == 0x1f)
*status |= FE_HAS_LOCK;
return 0;
}
static int tda8083_read_ber(struct dvb_frontend* fe, u32* ber)
{
struct tda8083_state* state = fe->demodulator_priv;
int ret;
u8 buf[3];
if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf))))
return ret;
*ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2];
return 0;
}
static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength)
{
struct tda8083_state* state = fe->demodulator_priv;
u8 signal = ~tda8083_readreg (state, 0x01);
*strength = (signal << 8) | signal;
return 0;
}
static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr)
{
struct tda8083_state* state = fe->demodulator_priv;
u8 _snr = tda8083_readreg (state, 0x08);
*snr = (_snr << 8) | _snr;
return 0;
}
static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
{
struct tda8083_state* state = fe->demodulator_priv;
*ucblocks = tda8083_readreg(state, 0x0f);
if (*ucblocks == 0xff)
*ucblocks = 0xffffffff;
return 0;
}
static int tda8083_set_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct tda8083_state* state = fe->demodulator_priv;
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);
}
tda8083_set_inversion (state, p->inversion);
tda8083_set_fec(state, p->fec_inner);
tda8083_set_symbolrate(state, p->symbol_rate);
tda8083_writereg (state, 0x00, 0x3c);
tda8083_writereg (state, 0x00, 0x04);
return 0;
}
static int tda8083_get_frontend(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct tda8083_state* state = fe->demodulator_priv;
/* FIXME: get symbolrate & frequency offset...*/
/*p->frequency = ???;*/
p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ?
INVERSION_ON : INVERSION_OFF;
p->fec_inner = tda8083_get_fec(state);
/*p->symbol_rate = tda8083_get_symbolrate (state);*/
return 0;
}
static int tda8083_sleep(struct dvb_frontend* fe)
{
struct tda8083_state* state = fe->demodulator_priv;
tda8083_writereg (state, 0x00, 0x02);
return 0;
}
static int tda8083_init(struct dvb_frontend* fe)
{
struct tda8083_state* state = fe->demodulator_priv;
int i;
for (i=0; i<44; i++)
tda8083_writereg (state, i, tda8083_init_tab[i]);
tda8083_writereg (state, 0x00, 0x3c);
tda8083_writereg (state, 0x00, 0x04);
return 0;
}
static int tda8083_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
{
struct tda8083_state* state = fe->demodulator_priv;
tda8083_send_diseqc_burst (state, burst);
tda8083_writereg (state, 0x00, 0x3c);
tda8083_writereg (state, 0x00, 0x04);
return 0;
}
static int tda8083_diseqc_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
{
struct tda8083_state* state = fe->demodulator_priv;
tda8083_set_tone (state, tone);
tda8083_writereg (state, 0x00, 0x3c);
tda8083_writereg (state, 0x00, 0x04);
return 0;
}
static int tda8083_diseqc_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
{
struct tda8083_state* state = fe->demodulator_priv;
tda8083_set_voltage (state, voltage);
tda8083_writereg (state, 0x00, 0x3c);
tda8083_writereg (state, 0x00, 0x04);
return 0;
}
static void tda8083_release(struct dvb_frontend* fe)
{
struct tda8083_state* state = fe->demodulator_priv;
kfree(state);
}
static struct dvb_frontend_ops tda8083_ops;
struct dvb_frontend* tda8083_attach(const struct tda8083_config* config,
struct i2c_adapter* i2c)
{
struct tda8083_state* state = NULL;
/* allocate memory for the internal state */
state = kzalloc(sizeof(struct tda8083_state), GFP_KERNEL);
if (state == NULL) goto error;
/* setup the state */
state->config = config;
state->i2c = i2c;
/* check if the demod is there */
if ((tda8083_readreg(state, 0x00)) != 0x05) goto error;
/* create dvb_frontend */
memcpy(&state->frontend.ops, &tda8083_ops, sizeof(struct dvb_frontend_ops));
state->frontend.demodulator_priv = state;
return &state->frontend;
error:
kfree(state);
return NULL;
}
static struct dvb_frontend_ops tda8083_ops = {
.delsys = { SYS_DVBS },
.info = {
.name = "Philips TDA8083 DVB-S",
.frequency_min = 920000, /* TDA8060 */
.frequency_max = 2200000, /* TDA8060 */
.frequency_stepsize = 125, /* kHz for QPSK frontends */
/* .frequency_tolerance = ???,*/
.symbol_rate_min = 12000000,
.symbol_rate_max = 30000000,
/* .symbol_rate_tolerance = ???,*/
.caps = FE_CAN_INVERSION_AUTO |
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
FE_CAN_QPSK | FE_CAN_MUTE_TS
},
.release = tda8083_release,
.init = tda8083_init,
.sleep = tda8083_sleep,
.set_frontend = tda8083_set_frontend,
.get_frontend = tda8083_get_frontend,
.read_status = tda8083_read_status,
.read_signal_strength = tda8083_read_signal_strength,
.read_snr = tda8083_read_snr,
.read_ber = tda8083_read_ber,
.read_ucblocks = tda8083_read_ucblocks,
.diseqc_send_master_cmd = tda8083_send_diseqc_msg,
.diseqc_send_burst = tda8083_diseqc_send_burst,
.set_tone = tda8083_diseqc_set_tone,
.set_voltage = tda8083_diseqc_set_voltage,
};
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator");
MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
MODULE_LICENSE("GPL");
EXPORT_SYMBOL(tda8083_attach);