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dddvb/ddbridge/ddbridge-sx8.c
none ee6eab9ead change IQ mode setting
2020-03-31 21:20:22 +02:00

588 lines
16 KiB
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/*
* ddbridge-sx8.c: Digital Devices MAX SX8 driver
*
* Copyright (C) 2018 Digital Devices GmbH
* Marcus Metzler <mocm@metzlerbros.de>
* Ralph Metzler <rjkm@metzlerbros.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 only, as published by the Free Software Foundation.
*
*
* 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, point your browser to
* http://www.gnu.org/copyleft/gpl.html
*/
#include "ddbridge.h"
#include "ddbridge-io.h"
#include "ddbridge-i2c.h"
#include "ddbridge-mci.h"
static int default_mod = 3;
module_param(default_mod, int, 0444);
MODULE_PARM_DESC(default_mod, "default modulations enabled, default is 3 (1 = QPSK, 2 = 8PSK, 4 = 16APSK, ...)");
static const u32 MCLK = (1550000000 / 12);
/* Add 2MBit/s overhead allowance (minimum factor is 90/32400 for QPSK w/o Pilots) */
static const u32 MAX_LDPC_BITRATE = (720000000 + 2000000);
static const u32 MAX_DEMOD_LDPC_BITRATE = (1550000000 / 6);
#define SX8_TUNER_NUM 4
#define SX8_DEMOD_NUM 8
#define SX8_DEMOD_NONE 0xff
struct sx8_base {
struct mci_base mci_base;
u8 tuner_use_count[SX8_TUNER_NUM];
u32 gain_mode[SX8_TUNER_NUM];
u32 used_ldpc_bitrate[SX8_DEMOD_NUM];
u8 demod_in_use[SX8_DEMOD_NUM];
u32 iq_mode;
u32 burst_size;
u32 direct_mode;
};
struct sx8 {
struct mci mci;
int first_time_lock;
int started;
int iq_started;
u32 bb_mode;
u32 local_frequency;
};
static const u8 dvbs2_bits_per_symbol[] = {
0, 0, 0, 0,
/* S2 QPSK */
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
/* S2 8PSK */
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3,
/* S2 16APSK */
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4,
/* S2 32APSK */
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
3, 0, 4, 0,
2, 2, 2, 2, 2, 2, // S2X QPSK
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, // S2X 8PSK
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, // S2X 16APSK
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, // S2X 32APSK
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, // S2X 64APSK
7, 7, 7, 7, // S2X 128APSK
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, // S2X 256APSK
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // S2X QPSK
3, 3, 3, 3, 3, 3, 3, 3, // S2X 8PSK
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, // S2X 16APSK
5, 5, 5, 5, // S2X 32APSK
3, 4, 5, 6, 8, 10,
};
static void release(struct dvb_frontend *fe)
{
struct sx8 *state = fe->demodulator_priv;
struct mci_base *mci_base = state->mci.base;
mci_base->count--;
if (mci_base->count == 0) {
list_del(&mci_base->mci_list);
kfree(mci_base);
}
kfree(state);
}
static int read_status(struct dvb_frontend *fe, enum fe_status *status)
{
int stat;
struct sx8 *state = fe->demodulator_priv;
struct mci_base *mci_base = state->mci.base;
struct sx8_base *sx8_base = (struct sx8_base *) mci_base;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
struct mci_result res;
stat = ddb_mci_get_status(&state->mci, &res);
if (stat)
return stat;
*status = 0x00;
ddb_mci_get_info(&state->mci);
if (res.status == SX8_DEMOD_WAIT_MATYPE)
*status = 0x0f;
if (res.status == MCI_DEMOD_LOCKED) {
*status = 0x1f;
if (state->mci.signal_info.dvbs2_signal_info.standard == 2) {
sx8_base->used_ldpc_bitrate[state->mci.nr] =
p->symbol_rate *
dvbs2_bits_per_symbol[
state->mci.signal_info.
dvbs2_signal_info.pls_code];
} else
sx8_base->used_ldpc_bitrate[state->mci.nr] = 0;
}
return stat;
}
static int mci_set_tuner(struct dvb_frontend *fe, u32 tuner, u32 on)
{
struct sx8 *state = fe->demodulator_priv;
struct mci_base *mci_base = state->mci.base;
struct sx8_base *sx8_base = (struct sx8_base *) mci_base;
struct mci_command cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.tuner = state->mci.tuner;
cmd.command = on ? SX8_CMD_INPUT_ENABLE : SX8_CMD_INPUT_DISABLE;
cmd.sx8_input_enable.flags = sx8_base->gain_mode[state->mci.tuner];
return ddb_mci_cmd(&state->mci, &cmd, NULL);
}
static int stop_iq(struct dvb_frontend *fe)
{
struct sx8 *state = fe->demodulator_priv;
struct mci_base *mci_base = state->mci.base;
struct sx8_base *sx8_base = (struct sx8_base *) mci_base;
struct mci_command cmd;
u32 input = state->mci.tuner;
if (!state->iq_started)
return -1;
memset(&cmd, 0, sizeof(cmd));
cmd.command = SX8_CMD_STOP_IQ;
cmd.demod = state->mci.demod;
ddb_mci_cmd(&state->mci, &cmd, NULL);
ddb_mci_config(&state->mci, SX8_TSCONFIG_MODE_NORMAL);
mutex_lock(&mci_base->tuner_lock);
sx8_base->tuner_use_count[input]--;
if (!sx8_base->tuner_use_count[input])
mci_set_tuner(fe, input, 0);
if (state->mci.demod != SX8_DEMOD_NONE) {
sx8_base->demod_in_use[state->mci.demod] = 0;
state->mci.demod = SX8_DEMOD_NONE;
}
sx8_base->used_ldpc_bitrate[state->mci.nr] = 0;
sx8_base->iq_mode = 0;
state->iq_started = 0;
mutex_unlock(&mci_base->tuner_lock);
return 0;
}
static int stop(struct dvb_frontend *fe)
{
struct sx8 *state = fe->demodulator_priv;
struct mci_base *mci_base = state->mci.base;
struct sx8_base *sx8_base = (struct sx8_base *) mci_base;
struct mci_command cmd;
u32 input = state->mci.tuner;
if (!state->started)
return -1;
memset(&cmd, 0, sizeof(cmd));
if (state->mci.demod != SX8_DEMOD_NONE) {
cmd.command = MCI_CMD_STOP;
cmd.demod = state->mci.demod;
ddb_mci_cmd(&state->mci, &cmd, NULL);
if (sx8_base->iq_mode) {
cmd.command = SX8_CMD_DISABLE_IQOUTPUT;
cmd.demod = state->mci.demod;
cmd.output = 0;
ddb_mci_cmd(&state->mci, &cmd, NULL);
ddb_mci_config(&state->mci, SX8_TSCONFIG_MODE_NORMAL);
}
}
mutex_lock(&mci_base->tuner_lock);
sx8_base->tuner_use_count[input]--;
if (!sx8_base->tuner_use_count[input])
mci_set_tuner(fe, input, 0);
if (state->mci.demod != SX8_DEMOD_NONE) {
sx8_base->demod_in_use[state->mci.demod] = 0;
state->mci.demod = SX8_DEMOD_NONE;
}
sx8_base->used_ldpc_bitrate[state->mci.nr] = 0;
sx8_base->iq_mode = 0;
mutex_unlock(&mci_base->tuner_lock);
state->started = 0;
return 0;
}
static int start(struct dvb_frontend *fe, u32 flags, u32 modmask, u32 ts_config)
{
struct sx8 *state = fe->demodulator_priv;
struct mci_base *mci_base = state->mci.base;
struct sx8_base *sx8_base = (struct sx8_base *) mci_base;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
static const u32 MAX_DEMOD_LDPC_BITRATE = (1550000000 / 6);
u32 used_ldpc_bitrate = 0, free_ldpc_bitrate;
u32 used_demods = 0;
struct mci_command cmd;
u32 input = state->mci.tuner;
u32 bits_per_symbol = 0;
int i = -1, stat = 0;
struct ddb_link *link = state->mci.base->link;
if (link->ids.device == 0x000b) {
/* Mask out higher modulations and MIS for Basic
or search command will fail */
modmask &= 3;
p->stream_id = NO_STREAM_ID_FILTER;
}
if (p->symbol_rate >= MCLK / 2)
flags &= ~1;
if ((flags & 3) == 0)
return -EINVAL;
if (flags & 2) {
u32 tmp = modmask;
bits_per_symbol = 1;
while (tmp & 1) {
tmp >>= 1;
bits_per_symbol++;
}
}
mutex_lock(&mci_base->tuner_lock);
if (sx8_base->iq_mode) {
stat = -EBUSY;
goto unlock;
}
if (sx8_base->direct_mode) {
if (p->symbol_rate >= MCLK / 2) {
if (state->mci.nr < 4)
i = state->mci.nr;
} else {
i = state->mci.nr;
}
} else {
for (i = 0; i < SX8_DEMOD_NUM; i++) {
used_ldpc_bitrate += sx8_base->used_ldpc_bitrate[i];
if (sx8_base->demod_in_use[i])
used_demods++;
}
if ((used_ldpc_bitrate >= MAX_LDPC_BITRATE) ||
((ts_config & SX8_TSCONFIG_MODE_MASK) >
SX8_TSCONFIG_MODE_NORMAL && used_demods > 0)) {
stat = -EBUSY;
goto unlock;
}
free_ldpc_bitrate = MAX_LDPC_BITRATE - used_ldpc_bitrate;
if (free_ldpc_bitrate > MAX_DEMOD_LDPC_BITRATE)
free_ldpc_bitrate = MAX_DEMOD_LDPC_BITRATE;
while (p->symbol_rate * bits_per_symbol > free_ldpc_bitrate)
bits_per_symbol--;
if (bits_per_symbol < 2) {
stat = -EBUSY;
goto unlock;
}
modmask &= ((1 << (bits_per_symbol - 1)) - 1);
if( ((flags & 0x02) != 0) && (modmask == 0)) {
stat = -EBUSY;
goto unlock;
}
i = (p->symbol_rate > MCLK / 2) ? 3 : 7;
while (i >= 0 && sx8_base->demod_in_use[i])
i--;
}
if (i < 0) {
stat = -EBUSY;
goto unlock;
}
sx8_base->demod_in_use[i] = 1;
sx8_base->used_ldpc_bitrate[state->mci.nr] = p->symbol_rate * bits_per_symbol;
state->mci.demod = i;
if (!sx8_base->tuner_use_count[input])
mci_set_tuner(fe, input, 1);
sx8_base->tuner_use_count[input]++;
sx8_base->iq_mode = (ts_config > 1);
unlock:
mutex_unlock(&mci_base->tuner_lock);
if (stat)
return stat;
memset(&cmd, 0, sizeof(cmd));
if (sx8_base->iq_mode) {
cmd.command = SX8_CMD_ENABLE_IQOUTPUT;
cmd.demod = state->mci.demod;
cmd.output = p->stream_id & 7;
ddb_mci_cmd(&state->mci, &cmd, NULL);
ddb_mci_config(&state->mci, ts_config);
}
if (p->stream_id != NO_STREAM_ID_FILTER && !(p->stream_id & 0xf0000000))
flags |= 0x80;
//printk("bw %u\n", p->bandwidth_hz);
if (p->bandwidth_hz && (p->bandwidth_hz < 20000)) {
flags |= 0x40;
/* +/- range, so multiply bandwidth_hz (actually in kHz) by 500 */
cmd.dvbs2_search.frequency_range = p->bandwidth_hz * 500;
//printk("range %u\n", cmd.dvbs2_search.frequency_range);
}
cmd.command = MCI_CMD_SEARCH_DVBS;
cmd.dvbs2_search.flags = flags;
cmd.dvbs2_search.s2_modulation_mask = modmask;
cmd.dvbs2_search.retry = 2;
cmd.dvbs2_search.frequency = p->frequency * 1000;
cmd.dvbs2_search.symbol_rate = p->symbol_rate;
cmd.dvbs2_search.scrambling_sequence_index =
p->scrambling_sequence_index | 0x80000000;
cmd.dvbs2_search.input_stream_id = p->stream_id;
cmd.tuner = state->mci.tuner;
cmd.demod = state->mci.demod;
cmd.output = state->mci.nr;
if (p->stream_id == 0x80000000)
cmd.output |= 0x80;
stat = ddb_mci_cmd(&state->mci, &cmd, NULL);
if (stat)
stop(fe);
return stat;
}
static int start_iq(struct dvb_frontend *fe, u32 flags,
u32 roll_off, u32 ts_config)
{
struct sx8 *state = fe->demodulator_priv;
struct mci_base *mci_base = state->mci.base;
struct sx8_base *sx8_base = (struct sx8_base *) mci_base;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
u32 used_demods = 0;
struct mci_command cmd;
u32 input = state->mci.tuner;
int i, stat = 0;
if (!state->iq_started) {
mutex_lock(&mci_base->tuner_lock);
if (sx8_base->iq_mode) {
stat = -EBUSY;
goto unlock;
}
for (i = 0; i < SX8_DEMOD_NUM; i++)
if (sx8_base->demod_in_use[i])
used_demods++;
if (used_demods > 0) {
stat = -EBUSY;
goto unlock;
}
state->mci.demod = 0;
if (!sx8_base->tuner_use_count[input])
mci_set_tuner(fe, input, 1);
sx8_base->tuner_use_count[input]++;
sx8_base->iq_mode = (ts_config > 1);
unlock:
mutex_unlock(&mci_base->tuner_lock);
if (stat)
return stat;
}
memset(&cmd, 0, sizeof(cmd));
cmd.command = SX8_CMD_START_IQ;
cmd.sx8_start_iq.flags = flags >> 8;
cmd.sx8_start_iq.roll_off = roll_off;
cmd.sx8_start_iq.frequency = p->frequency * 1000;
cmd.sx8_start_iq.symbol_rate = p->symbol_rate;
cmd.sx8_start_iq.gain = flags & 0xff;
cmd.tuner = state->mci.tuner;
cmd.demod = state->mci.demod;
stat = ddb_mci_cmd(&state->mci, &cmd, NULL);
if (stat)
stop_iq(fe);
ddb_mci_config(&state->mci, ts_config);
return stat;
}
static int set_lna(struct dvb_frontend *fe)
{
printk("set_lna\n");
return 0;
}
static int set_parameters(struct dvb_frontend *fe)
{
int stat = 0;
struct sx8 *state = fe->demodulator_priv;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
u32 ts_config = SX8_TSCONFIG_MODE_NORMAL, iq_mode = 0, isi;
isi = p->stream_id;
if (isi != NO_STREAM_ID_FILTER) {
iq_mode = (isi & 0x30000000) >> 28;
}
if (iq_mode)
ts_config = (SX8_TSCONFIG_TSHEADER | SX8_TSCONFIG_MODE_IQ);
stop(fe);
if (iq_mode < 2) {
u32 mask;
stop_iq(fe);
switch (p->modulation) {
case APSK_256:
mask = 0x7f;
break;
case APSK_128:
mask = 0x3f;
break;
case APSK_64:
mask = 0x1f;
break;
case APSK_32:
mask = 0x0f;
break;
case APSK_16:
mask = 0x07;
break;
default:
mask = default_mod;
break;
}
stat = start(fe, 3, mask, ts_config);
if (!stat) {
state->started = 1;
state->first_time_lock = 1;
state->mci.signal_info.status = MCI_DEMOD_WAIT_SIGNAL;
}
} else {
stat = start_iq(fe, (isi >> 8) & 0xffff, 4, ts_config);
if (!stat) {
state->iq_started = 1;
state->first_time_lock = 1;
state->mci.signal_info.status = MCI_DEMOD_WAIT_SIGNAL;
}
}
return stat;
}
static int tune(struct dvb_frontend *fe, bool re_tune,
unsigned int mode_flags,
unsigned int *delay, enum fe_status *status)
{
int r;
if (re_tune) {
r = set_parameters(fe);
if (r)
return r;
}
r = read_status(fe, status);
if (r)
return r;
if (*status & FE_HAS_LOCK)
return 0;
*delay = HZ / 10;
return 0;
}
static int get_algo(struct dvb_frontend *fe)
{
return DVBFE_ALGO_HW;
}
static int set_input(struct dvb_frontend *fe, int input)
{
struct sx8 *state = fe->demodulator_priv;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
if (input >= SX8_TUNER_NUM)
return -EINVAL;
if (state->mci.tuner == input)
return 0;
stop_iq(fe);
stop(fe);
state->mci.tuner = p->input = input;
return 0;
}
static int sleep(struct dvb_frontend *fe)
{
stop_iq(fe);
stop(fe);
return 0;
}
static int get_frontend(struct dvb_frontend *fe, struct dtv_frontend_properties *p)
{
struct sx8 *state = fe->demodulator_priv;
ddb_mci_proc_info(&state->mci, p);
return 0;
}
static struct dvb_frontend_ops sx8_ops = {
.delsys = { SYS_DVBS, SYS_DVBS2 },
.xbar = { 4, 0, 8 }, /* tuner_max, demod id, demod_max */
.info = {
.name = "DVB-S/S2X",
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_stepsize = 0,
.frequency_tolerance = 0,
.symbol_rate_min = 100000,
.symbol_rate_max = 100000000,
.caps = FE_CAN_INVERSION_AUTO |
FE_CAN_FEC_AUTO |
FE_CAN_QPSK |
FE_CAN_2G_MODULATION |
FE_CAN_MULTISTREAM,
},
.get_frontend_algo = get_algo,
.get_frontend = get_frontend,
.tune = tune,
.release = release,
.read_status = read_status,
.set_input = set_input,
.set_lna = set_lna,
.sleep = sleep,
};
static int init(struct mci *mci)
{
struct sx8 *state = (struct sx8 *) mci;
state->mci.demod = SX8_DEMOD_NONE;
mci->fe.ops.xbar[1] = mci->nr;
mci->fe.dtv_property_cache.input = mci->tuner;
return 0;
}
static int base_init(struct mci_base *mci_base)
{
//struct sx8_base *base = (struct sx8_base *) mci_base;
return 0;
}
struct mci_cfg ddb_max_sx8_cfg = {
.type = 0,
.fe_ops = &sx8_ops,
.base_size = sizeof(struct sx8_base),
.state_size = sizeof(struct sx8),
.init = init,
.base_init = base_init,
};
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