487 lines
12 KiB
C
487 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* ddbridge-sx8.c: Digital Devices MAX SX8 driver
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*
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* Copyright (C) 2018 Digital Devices GmbH
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* Marcus Metzler <mocm@metzlerbros.de>
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* Ralph Metzler <rjkm@metzlerbros.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 only, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "ddbridge.h"
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#include "ddbridge-io.h"
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#include "ddbridge-mci.h"
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static const u32 MCLK = (1550000000 / 12);
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static const u32 MAX_LDPC_BITRATE = (720000000);
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static const u32 MAX_DEMOD_LDPC_BITRATE = (1550000000 / 6);
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#define SX8_TUNER_NUM 4
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#define SX8_DEMOD_NUM 8
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#define SX8_DEMOD_NONE 0xff
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struct sx8_base {
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struct mci_base mci_base;
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u8 tuner_use_count[SX8_TUNER_NUM];
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u32 gain_mode[SX8_TUNER_NUM];
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u32 used_ldpc_bitrate[SX8_DEMOD_NUM];
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u8 demod_in_use[SX8_DEMOD_NUM];
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u32 iq_mode;
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u32 burst_size;
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u32 direct_mode;
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};
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struct sx8 {
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struct mci mci;
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int first_time_lock;
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int started;
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struct mci_result signal_info;
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u32 bb_mode;
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u32 local_frequency;
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};
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static void release(struct dvb_frontend *fe)
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{
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struct sx8 *state = fe->demodulator_priv;
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struct mci_base *mci_base = state->mci.base;
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mci_base->count--;
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if (mci_base->count == 0) {
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list_del(&mci_base->mci_list);
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kfree(mci_base);
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}
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kfree(state);
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}
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static int get_info(struct dvb_frontend *fe)
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{
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int stat;
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struct sx8 *state = fe->demodulator_priv;
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struct mci_command cmd;
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memset(&cmd, 0, sizeof(cmd));
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cmd.command = MCI_CMD_GETSIGNALINFO;
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cmd.demod = state->mci.demod;
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stat = ddb_mci_cmd(&state->mci, &cmd, &state->signal_info);
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return stat;
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}
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static int get_snr(struct dvb_frontend *fe)
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{
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struct sx8 *state = fe->demodulator_priv;
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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p->cnr.len = 1;
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p->cnr.stat[0].scale = FE_SCALE_DECIBEL;
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p->cnr.stat[0].svalue =
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(s64)state->signal_info.dvbs2_signal_info.signal_to_noise
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* 10;
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return 0;
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}
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static int get_strength(struct dvb_frontend *fe)
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{
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struct sx8 *state = fe->demodulator_priv;
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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s32 str;
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str = 100000 -
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(state->signal_info.dvbs2_signal_info.channel_power
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* 10 + 108750);
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p->strength.len = 1;
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p->strength.stat[0].scale = FE_SCALE_DECIBEL;
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p->strength.stat[0].svalue = str;
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return 0;
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}
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static int read_status(struct dvb_frontend *fe, enum fe_status *status)
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{
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int stat;
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struct sx8 *state = fe->demodulator_priv;
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struct mci_command cmd;
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struct mci_result res;
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cmd.command = MCI_CMD_GETSTATUS;
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cmd.demod = state->mci.demod;
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stat = ddb_mci_cmd(&state->mci, &cmd, &res);
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if (stat)
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return stat;
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*status = 0x00;
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get_info(fe);
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get_strength(fe);
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if (res.status == SX8_DEMOD_WAIT_MATYPE)
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*status = 0x0f;
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if (res.status == SX8_DEMOD_LOCKED) {
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*status = 0x1f;
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get_snr(fe);
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}
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return stat;
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}
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static int mci_set_tuner(struct dvb_frontend *fe, u32 tuner, u32 on)
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{
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struct sx8 *state = fe->demodulator_priv;
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struct mci_base *mci_base = state->mci.base;
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struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
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struct mci_command cmd;
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memset(&cmd, 0, sizeof(cmd));
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cmd.tuner = state->mci.tuner;
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cmd.command = on ? SX8_CMD_INPUT_ENABLE : SX8_CMD_INPUT_DISABLE;
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cmd.sx8_input_enable.flags = sx8_base->gain_mode[state->mci.tuner];
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return ddb_mci_cmd(&state->mci, &cmd, NULL);
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}
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static int stop(struct dvb_frontend *fe)
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{
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struct sx8 *state = fe->demodulator_priv;
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struct mci_base *mci_base = state->mci.base;
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struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
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struct mci_command cmd;
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u32 input = state->mci.tuner;
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memset(&cmd, 0, sizeof(cmd));
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if (state->mci.demod != SX8_DEMOD_NONE) {
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cmd.command = MCI_CMD_STOP;
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cmd.demod = state->mci.demod;
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ddb_mci_cmd(&state->mci, &cmd, NULL);
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if (sx8_base->iq_mode) {
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cmd.command = SX8_CMD_DISABLE_IQOUTPUT;
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cmd.demod = state->mci.demod;
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cmd.output = 0;
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ddb_mci_cmd(&state->mci, &cmd, NULL);
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ddb_mci_config(&state->mci, SX8_TSCONFIG_MODE_NORMAL);
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}
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}
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mutex_lock(&mci_base->tuner_lock);
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sx8_base->tuner_use_count[input]--;
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if (!sx8_base->tuner_use_count[input])
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mci_set_tuner(fe, input, 0);
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if (state->mci.demod < SX8_DEMOD_NUM) {
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sx8_base->demod_in_use[state->mci.demod] = 0;
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state->mci.demod = SX8_DEMOD_NONE;
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}
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sx8_base->used_ldpc_bitrate[state->mci.nr] = 0;
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sx8_base->iq_mode = 0;
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mutex_unlock(&mci_base->tuner_lock);
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state->started = 0;
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return 0;
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}
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static int start(struct dvb_frontend *fe, u32 flags, u32 modmask, u32 ts_config)
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{
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struct sx8 *state = fe->demodulator_priv;
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struct mci_base *mci_base = state->mci.base;
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struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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u32 used_ldpc_bitrate = 0, free_ldpc_bitrate;
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u32 used_demods = 0;
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struct mci_command cmd;
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u32 input = state->mci.tuner;
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u32 bits_per_symbol = 0;
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int i = -1, stat = 0;
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if (p->symbol_rate >= (MCLK / 2))
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flags &= ~1;
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if ((flags & 3) == 0)
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return -EINVAL;
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if (flags & 2) {
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u32 tmp = modmask;
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bits_per_symbol = 1;
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while (tmp & 1) {
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tmp >>= 1;
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bits_per_symbol++;
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}
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}
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mutex_lock(&mci_base->tuner_lock);
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if (sx8_base->iq_mode) {
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stat = -EBUSY;
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goto unlock;
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}
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if (sx8_base->direct_mode) {
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if (p->symbol_rate >= MCLK / 2) {
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if (state->mci.nr < 4)
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i = state->mci.nr;
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} else {
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i = state->mci.nr;
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}
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} else {
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for (i = 0; i < SX8_DEMOD_NUM; i++) {
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used_ldpc_bitrate += sx8_base->used_ldpc_bitrate[i];
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if (sx8_base->demod_in_use[i])
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used_demods++;
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}
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if (used_ldpc_bitrate >= MAX_LDPC_BITRATE ||
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((ts_config & SX8_TSCONFIG_MODE_MASK) >
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SX8_TSCONFIG_MODE_NORMAL && used_demods > 0)) {
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stat = -EBUSY;
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goto unlock;
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}
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free_ldpc_bitrate = MAX_LDPC_BITRATE - used_ldpc_bitrate;
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if (free_ldpc_bitrate > MAX_DEMOD_LDPC_BITRATE)
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free_ldpc_bitrate = MAX_DEMOD_LDPC_BITRATE;
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while (p->symbol_rate * bits_per_symbol > free_ldpc_bitrate)
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bits_per_symbol--;
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if (bits_per_symbol < 2) {
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stat = -EBUSY;
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goto unlock;
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}
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modmask &= ((1 << (bits_per_symbol - 1)) - 1);
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if (((flags & 0x02) != 0) && modmask == 0) {
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stat = -EBUSY;
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goto unlock;
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}
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i = (p->symbol_rate > (MCLK / 2)) ? 3 : 7;
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while (i >= 0 && sx8_base->demod_in_use[i])
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i--;
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}
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if (i < 0) {
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stat = -EBUSY;
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goto unlock;
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}
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sx8_base->demod_in_use[i] = 1;
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sx8_base->used_ldpc_bitrate[state->mci.nr] = p->symbol_rate
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* bits_per_symbol;
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state->mci.demod = i;
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if (!sx8_base->tuner_use_count[input])
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mci_set_tuner(fe, input, 1);
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sx8_base->tuner_use_count[input]++;
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sx8_base->iq_mode = (ts_config > 1);
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unlock:
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mutex_unlock(&mci_base->tuner_lock);
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if (stat)
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return stat;
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memset(&cmd, 0, sizeof(cmd));
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if (sx8_base->iq_mode) {
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cmd.command = SX8_CMD_ENABLE_IQOUTPUT;
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cmd.demod = state->mci.demod;
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cmd.output = 0;
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ddb_mci_cmd(&state->mci, &cmd, NULL);
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ddb_mci_config(&state->mci, ts_config);
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}
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if (p->stream_id != NO_STREAM_ID_FILTER && p->stream_id != 0x80000000)
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flags |= 0x80;
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dev_dbg(mci_base->dev, "MCI-%d: tuner=%d demod=%d\n",
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state->mci.nr, state->mci.tuner, state->mci.demod);
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cmd.command = MCI_CMD_SEARCH_DVBS;
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cmd.dvbs2_search.flags = flags;
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cmd.dvbs2_search.s2_modulation_mask = modmask;
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cmd.dvbs2_search.retry = 2;
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cmd.dvbs2_search.frequency = p->frequency * 1000;
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cmd.dvbs2_search.symbol_rate = p->symbol_rate;
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cmd.dvbs2_search.scrambling_sequence_index =
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p->scrambling_sequence_index | 0x80000000;
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cmd.dvbs2_search.input_stream_id =
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(p->stream_id != NO_STREAM_ID_FILTER) ? p->stream_id : 0;
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cmd.tuner = state->mci.tuner;
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cmd.demod = state->mci.demod;
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cmd.output = state->mci.nr;
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if (p->stream_id == 0x80000000)
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cmd.output |= 0x80;
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stat = ddb_mci_cmd(&state->mci, &cmd, NULL);
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if (stat)
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stop(fe);
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return stat;
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}
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static int start_iq(struct dvb_frontend *fe, u32 flags, u32 roll_off,
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u32 ts_config)
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{
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struct sx8 *state = fe->demodulator_priv;
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struct mci_base *mci_base = state->mci.base;
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struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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u32 used_demods = 0;
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struct mci_command cmd;
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u32 input = state->mci.tuner;
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int i, stat = 0;
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mutex_lock(&mci_base->tuner_lock);
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if (sx8_base->iq_mode) {
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stat = -EBUSY;
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goto unlock;
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}
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for (i = 0; i < SX8_DEMOD_NUM; i++)
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if (sx8_base->demod_in_use[i])
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used_demods++;
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if (used_demods > 0) {
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stat = -EBUSY;
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goto unlock;
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}
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state->mci.demod = 0;
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if (!sx8_base->tuner_use_count[input])
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mci_set_tuner(fe, input, 1);
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sx8_base->tuner_use_count[input]++;
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sx8_base->iq_mode = (ts_config > 1);
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unlock:
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mutex_unlock(&mci_base->tuner_lock);
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if (stat)
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return stat;
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memset(&cmd, 0, sizeof(cmd));
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cmd.command = SX8_CMD_START_IQ;
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cmd.sx8_start_iq.flags = flags;
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cmd.sx8_start_iq.roll_off = roll_off;
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cmd.sx8_start_iq.frequency = p->frequency * 1000;
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cmd.sx8_start_iq.symbol_rate = p->symbol_rate;
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cmd.tuner = state->mci.tuner;
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cmd.demod = state->mci.demod;
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stat = ddb_mci_cmd(&state->mci, &cmd, NULL);
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if (stat)
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stop(fe);
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ddb_mci_config(&state->mci, ts_config);
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return stat;
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}
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static int set_parameters(struct dvb_frontend *fe)
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{
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int stat = 0;
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struct sx8 *state = fe->demodulator_priv;
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struct dtv_frontend_properties *p = &fe->dtv_property_cache;
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u32 ts_config = SX8_TSCONFIG_MODE_NORMAL, iq_mode = 0, isi;
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if (state->started)
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stop(fe);
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isi = p->stream_id;
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if (isi != NO_STREAM_ID_FILTER)
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iq_mode = (isi & 0x30000000) >> 28;
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if (iq_mode)
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ts_config = (SX8_TSCONFIG_TSHEADER | SX8_TSCONFIG_MODE_IQ);
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if (iq_mode < 3) {
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u32 mask;
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switch (p->modulation) {
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/* uncomment whenever these modulations hit the DVB API
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* case APSK_256:
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* mask = 0x7f;
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* break;
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* case APSK_128:
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* mask = 0x3f;
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* break;
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* case APSK_64:
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* mask = 0x1f;
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* break;
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*/
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case APSK_32:
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mask = 0x0f;
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break;
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case APSK_16:
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mask = 0x07;
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break;
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default:
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mask = 0x03;
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break;
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}
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stat = start(fe, 3, mask, ts_config);
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} else {
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stat = start_iq(fe, 0, 4, ts_config);
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}
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if (!stat) {
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state->started = 1;
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state->first_time_lock = 1;
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state->signal_info.status = SX8_DEMOD_WAIT_SIGNAL;
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}
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return stat;
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}
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static int tune(struct dvb_frontend *fe, bool re_tune,
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unsigned int mode_flags,
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unsigned int *delay, enum fe_status *status)
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{
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int r;
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if (re_tune) {
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r = set_parameters(fe);
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if (r)
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return r;
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}
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r = read_status(fe, status);
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if (r)
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return r;
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if (*status & FE_HAS_LOCK)
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return 0;
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*delay = HZ / 10;
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return 0;
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}
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static enum dvbfe_algo get_algo(struct dvb_frontend *fe)
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{
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return DVBFE_ALGO_HW;
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}
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static int set_input(struct dvb_frontend *fe, int input)
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{
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struct sx8 *state = fe->demodulator_priv;
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struct mci_base *mci_base = state->mci.base;
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if (input >= SX8_TUNER_NUM)
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return -EINVAL;
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state->mci.tuner = input;
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dev_dbg(mci_base->dev, "MCI-%d: input=%d\n", state->mci.nr, input);
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return 0;
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}
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static struct dvb_frontend_ops sx8_ops = {
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.delsys = { SYS_DVBS, SYS_DVBS2 },
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.info = {
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.name = "Digital Devices MaxSX8 MCI DVB-S/S2/S2X",
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.frequency_min_hz = 950 * MHz,
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.frequency_max_hz = 2150 * MHz,
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.symbol_rate_min = 100000,
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.symbol_rate_max = 100000000,
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.caps = FE_CAN_INVERSION_AUTO |
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FE_CAN_FEC_AUTO |
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FE_CAN_QPSK |
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FE_CAN_2G_MODULATION |
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FE_CAN_MULTISTREAM,
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},
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.get_frontend_algo = get_algo,
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.tune = tune,
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.release = release,
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.read_status = read_status,
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};
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static int init(struct mci *mci)
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{
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struct sx8 *state = (struct sx8 *)mci;
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state->mci.demod = SX8_DEMOD_NONE;
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return 0;
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}
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const struct mci_cfg ddb_max_sx8_cfg = {
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.type = 0,
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.fe_ops = &sx8_ops,
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.base_size = sizeof(struct sx8_base),
|
|
.state_size = sizeof(struct sx8),
|
|
.init = init,
|
|
.set_input = set_input,
|
|
};
|