1 // SPDX-License-Identifier: GPL-2.0
3 * ddbridge-sx8.c: Digital Devices MAX SX8 driver
5 * Copyright (C) 2018 Digital Devices GmbH
6 * Marcus Metzler <mocm@metzlerbros.de>
7 * Ralph Metzler <rjkm@metzlerbros.de>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 only, as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
20 #include "ddbridge-io.h"
21 #include "ddbridge-mci.h"
23 static const u32 MCLK = (1550000000 / 12);
24 static const u32 MAX_LDPC_BITRATE = (720000000);
25 static const u32 MAX_DEMOD_LDPC_BITRATE = (1550000000 / 6);
27 #define SX8_TUNER_NUM 4
28 #define SX8_DEMOD_NUM 8
29 #define SX8_DEMOD_NONE 0xff
32 struct mci_base mci_base;
34 u8 tuner_use_count[SX8_TUNER_NUM];
35 u32 gain_mode[SX8_TUNER_NUM];
37 u32 used_ldpc_bitrate[SX8_DEMOD_NUM];
38 u8 demod_in_use[SX8_DEMOD_NUM];
49 struct mci_result signal_info;
55 static void release(struct dvb_frontend *fe)
57 struct sx8 *state = fe->demodulator_priv;
58 struct mci_base *mci_base = state->mci.base;
61 if (mci_base->count == 0) {
62 list_del(&mci_base->mci_list);
68 static int get_info(struct dvb_frontend *fe)
71 struct sx8 *state = fe->demodulator_priv;
72 struct mci_command cmd;
74 memset(&cmd, 0, sizeof(cmd));
75 cmd.command = MCI_CMD_GETSIGNALINFO;
76 cmd.demod = state->mci.demod;
77 stat = ddb_mci_cmd(&state->mci, &cmd, &state->signal_info);
81 static int get_snr(struct dvb_frontend *fe)
83 struct sx8 *state = fe->demodulator_priv;
84 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
87 p->cnr.stat[0].scale = FE_SCALE_DECIBEL;
88 p->cnr.stat[0].svalue =
89 (s64)state->signal_info.dvbs2_signal_info.signal_to_noise
94 static int get_strength(struct dvb_frontend *fe)
96 struct sx8 *state = fe->demodulator_priv;
97 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
101 (state->signal_info.dvbs2_signal_info.channel_power
104 p->strength.stat[0].scale = FE_SCALE_DECIBEL;
105 p->strength.stat[0].svalue = str;
109 static int read_status(struct dvb_frontend *fe, enum fe_status *status)
112 struct sx8 *state = fe->demodulator_priv;
113 struct mci_command cmd;
114 struct mci_result res;
116 cmd.command = MCI_CMD_GETSTATUS;
117 cmd.demod = state->mci.demod;
118 stat = ddb_mci_cmd(&state->mci, &cmd, &res);
124 if (res.status == SX8_DEMOD_WAIT_MATYPE)
126 if (res.status == SX8_DEMOD_LOCKED) {
133 static int mci_set_tuner(struct dvb_frontend *fe, u32 tuner, u32 on)
135 struct sx8 *state = fe->demodulator_priv;
136 struct mci_base *mci_base = state->mci.base;
137 struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
138 struct mci_command cmd;
140 memset(&cmd, 0, sizeof(cmd));
141 cmd.tuner = state->mci.tuner;
142 cmd.command = on ? SX8_CMD_INPUT_ENABLE : SX8_CMD_INPUT_DISABLE;
143 cmd.sx8_input_enable.flags = sx8_base->gain_mode[state->mci.tuner];
144 return ddb_mci_cmd(&state->mci, &cmd, NULL);
147 static int stop(struct dvb_frontend *fe)
149 struct sx8 *state = fe->demodulator_priv;
150 struct mci_base *mci_base = state->mci.base;
151 struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
152 struct mci_command cmd;
153 u32 input = state->mci.tuner;
155 memset(&cmd, 0, sizeof(cmd));
156 if (state->mci.demod != SX8_DEMOD_NONE) {
157 cmd.command = MCI_CMD_STOP;
158 cmd.demod = state->mci.demod;
159 ddb_mci_cmd(&state->mci, &cmd, NULL);
160 if (sx8_base->iq_mode) {
161 cmd.command = SX8_CMD_DISABLE_IQOUTPUT;
162 cmd.demod = state->mci.demod;
164 ddb_mci_cmd(&state->mci, &cmd, NULL);
165 ddb_mci_config(&state->mci, SX8_TSCONFIG_MODE_NORMAL);
168 mutex_lock(&mci_base->tuner_lock);
169 sx8_base->tuner_use_count[input]--;
170 if (!sx8_base->tuner_use_count[input])
171 mci_set_tuner(fe, input, 0);
172 if (state->mci.demod < SX8_DEMOD_NUM) {
173 sx8_base->demod_in_use[state->mci.demod] = 0;
174 state->mci.demod = SX8_DEMOD_NONE;
176 sx8_base->used_ldpc_bitrate[state->mci.nr] = 0;
177 sx8_base->iq_mode = 0;
178 mutex_unlock(&mci_base->tuner_lock);
183 static int start(struct dvb_frontend *fe, u32 flags, u32 modmask, u32 ts_config)
185 struct sx8 *state = fe->demodulator_priv;
186 struct mci_base *mci_base = state->mci.base;
187 struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
188 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
189 u32 used_ldpc_bitrate = 0, free_ldpc_bitrate;
191 struct mci_command cmd;
192 u32 input = state->mci.tuner;
193 u32 bits_per_symbol = 0;
194 int i = -1, stat = 0;
196 if (p->symbol_rate >= (MCLK / 2))
198 if ((flags & 3) == 0)
211 mutex_lock(&mci_base->tuner_lock);
212 if (sx8_base->iq_mode) {
217 if (sx8_base->direct_mode) {
218 if (p->symbol_rate >= MCLK / 2) {
219 if (state->mci.nr < 4)
225 for (i = 0; i < SX8_DEMOD_NUM; i++) {
226 used_ldpc_bitrate += sx8_base->used_ldpc_bitrate[i];
227 if (sx8_base->demod_in_use[i])
230 if (used_ldpc_bitrate >= MAX_LDPC_BITRATE ||
231 ((ts_config & SX8_TSCONFIG_MODE_MASK) >
232 SX8_TSCONFIG_MODE_NORMAL && used_demods > 0)) {
236 free_ldpc_bitrate = MAX_LDPC_BITRATE - used_ldpc_bitrate;
237 if (free_ldpc_bitrate > MAX_DEMOD_LDPC_BITRATE)
238 free_ldpc_bitrate = MAX_DEMOD_LDPC_BITRATE;
240 while (p->symbol_rate * bits_per_symbol > free_ldpc_bitrate)
242 if (bits_per_symbol < 2) {
247 modmask &= ((1 << (bits_per_symbol - 1)) - 1);
248 if (((flags & 0x02) != 0) && modmask == 0) {
253 i = (p->symbol_rate > (MCLK / 2)) ? 3 : 7;
254 while (i >= 0 && sx8_base->demod_in_use[i])
262 sx8_base->demod_in_use[i] = 1;
263 sx8_base->used_ldpc_bitrate[state->mci.nr] = p->symbol_rate
265 state->mci.demod = i;
267 if (!sx8_base->tuner_use_count[input])
268 mci_set_tuner(fe, input, 1);
269 sx8_base->tuner_use_count[input]++;
270 sx8_base->iq_mode = (ts_config > 1);
272 mutex_unlock(&mci_base->tuner_lock);
275 memset(&cmd, 0, sizeof(cmd));
277 if (sx8_base->iq_mode) {
278 cmd.command = SX8_CMD_ENABLE_IQOUTPUT;
279 cmd.demod = state->mci.demod;
281 ddb_mci_cmd(&state->mci, &cmd, NULL);
282 ddb_mci_config(&state->mci, ts_config);
284 if (p->stream_id != NO_STREAM_ID_FILTER && p->stream_id != 0x80000000)
286 dev_dbg(mci_base->dev, "MCI-%d: tuner=%d demod=%d\n",
287 state->mci.nr, state->mci.tuner, state->mci.demod);
288 cmd.command = MCI_CMD_SEARCH_DVBS;
289 cmd.dvbs2_search.flags = flags;
290 cmd.dvbs2_search.s2_modulation_mask = modmask;
291 cmd.dvbs2_search.retry = 2;
292 cmd.dvbs2_search.frequency = p->frequency * 1000;
293 cmd.dvbs2_search.symbol_rate = p->symbol_rate;
294 cmd.dvbs2_search.scrambling_sequence_index =
295 p->scrambling_sequence_index | 0x80000000;
296 cmd.dvbs2_search.input_stream_id =
297 (p->stream_id != NO_STREAM_ID_FILTER) ? p->stream_id : 0;
298 cmd.tuner = state->mci.tuner;
299 cmd.demod = state->mci.demod;
300 cmd.output = state->mci.nr;
301 if (p->stream_id == 0x80000000)
303 stat = ddb_mci_cmd(&state->mci, &cmd, NULL);
309 static int start_iq(struct dvb_frontend *fe, u32 flags, u32 roll_off,
312 struct sx8 *state = fe->demodulator_priv;
313 struct mci_base *mci_base = state->mci.base;
314 struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
315 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
317 struct mci_command cmd;
318 u32 input = state->mci.tuner;
321 mutex_lock(&mci_base->tuner_lock);
322 if (sx8_base->iq_mode) {
326 for (i = 0; i < SX8_DEMOD_NUM; i++)
327 if (sx8_base->demod_in_use[i])
329 if (used_demods > 0) {
333 state->mci.demod = 0;
334 if (!sx8_base->tuner_use_count[input])
335 mci_set_tuner(fe, input, 1);
336 sx8_base->tuner_use_count[input]++;
337 sx8_base->iq_mode = (ts_config > 1);
339 mutex_unlock(&mci_base->tuner_lock);
343 memset(&cmd, 0, sizeof(cmd));
344 cmd.command = SX8_CMD_START_IQ;
345 cmd.sx8_start_iq.flags = flags;
346 cmd.sx8_start_iq.roll_off = roll_off;
347 cmd.sx8_start_iq.frequency = p->frequency * 1000;
348 cmd.sx8_start_iq.symbol_rate = p->symbol_rate;
349 cmd.tuner = state->mci.tuner;
350 cmd.demod = state->mci.demod;
351 stat = ddb_mci_cmd(&state->mci, &cmd, NULL);
354 ddb_mci_config(&state->mci, ts_config);
358 static int set_parameters(struct dvb_frontend *fe)
361 struct sx8 *state = fe->demodulator_priv;
362 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
363 u32 ts_config = SX8_TSCONFIG_MODE_NORMAL, iq_mode = 0, isi;
369 if (isi != NO_STREAM_ID_FILTER)
370 iq_mode = (isi & 0x30000000) >> 28;
373 ts_config = (SX8_TSCONFIG_TSHEADER | SX8_TSCONFIG_MODE_IQ);
377 switch (p->modulation) {
378 /* uncomment whenever these modulations hit the DVB API
399 stat = start(fe, 3, mask, ts_config);
401 stat = start_iq(fe, 0, 4, ts_config);
405 state->first_time_lock = 1;
406 state->signal_info.status = SX8_DEMOD_WAIT_SIGNAL;
412 static int tune(struct dvb_frontend *fe, bool re_tune,
413 unsigned int mode_flags,
414 unsigned int *delay, enum fe_status *status)
419 r = set_parameters(fe);
423 r = read_status(fe, status);
427 if (*status & FE_HAS_LOCK)
433 static enum dvbfe_algo get_algo(struct dvb_frontend *fe)
435 return DVBFE_ALGO_HW;
438 static int set_input(struct dvb_frontend *fe, int input)
440 struct sx8 *state = fe->demodulator_priv;
441 struct mci_base *mci_base = state->mci.base;
443 if (input >= SX8_TUNER_NUM)
446 state->mci.tuner = input;
447 dev_dbg(mci_base->dev, "MCI-%d: input=%d\n", state->mci.nr, input);
451 static struct dvb_frontend_ops sx8_ops = {
452 .delsys = { SYS_DVBS, SYS_DVBS2 },
454 .name = "Digital Devices MaxSX8 MCI DVB-S/S2/S2X",
455 .frequency_min_hz = 950 * MHz,
456 .frequency_max_hz = 2150 * MHz,
457 .symbol_rate_min = 100000,
458 .symbol_rate_max = 100000000,
459 .caps = FE_CAN_INVERSION_AUTO |
462 FE_CAN_2G_MODULATION |
465 .get_frontend_algo = get_algo,
468 .read_status = read_status,
471 static int init(struct mci *mci)
473 struct sx8 *state = (struct sx8 *)mci;
475 state->mci.demod = SX8_DEMOD_NONE;
479 const struct mci_cfg ddb_max_sx8_cfg = {
482 .base_size = sizeof(struct sx8_base),
483 .state_size = sizeof(struct sx8),
485 .set_input = set_input,