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>
11 #include "ddbridge-io.h"
12 #include "ddbridge-mci.h"
14 static const u32 MCLK = (1550000000 / 12);
15 static const u32 MAX_LDPC_BITRATE = (720000000);
16 static const u32 MAX_DEMOD_LDPC_BITRATE = (1550000000 / 6);
18 #define SX8_TUNER_NUM 4
19 #define SX8_DEMOD_NUM 8
20 #define SX8_DEMOD_NONE 0xff
23 struct mci_base mci_base;
25 u8 tuner_use_count[SX8_TUNER_NUM];
26 u32 gain_mode[SX8_TUNER_NUM];
28 u32 used_ldpc_bitrate[SX8_DEMOD_NUM];
29 u8 demod_in_use[SX8_DEMOD_NUM];
40 struct mci_result signal_info;
46 static void release(struct dvb_frontend *fe)
48 struct sx8 *state = fe->demodulator_priv;
49 struct mci_base *mci_base = state->mci.base;
52 if (mci_base->count == 0) {
53 list_del(&mci_base->mci_list);
59 static int get_info(struct dvb_frontend *fe)
62 struct sx8 *state = fe->demodulator_priv;
63 struct mci_command cmd;
65 memset(&cmd, 0, sizeof(cmd));
66 cmd.command = MCI_CMD_GETSIGNALINFO;
67 cmd.demod = state->mci.demod;
68 stat = ddb_mci_cmd(&state->mci, &cmd, &state->signal_info);
72 static int get_snr(struct dvb_frontend *fe)
74 struct sx8 *state = fe->demodulator_priv;
75 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
78 p->cnr.stat[0].scale = FE_SCALE_DECIBEL;
79 p->cnr.stat[0].svalue =
80 (s64)state->signal_info.dvbs2_signal_info.signal_to_noise
85 static int get_strength(struct dvb_frontend *fe)
87 struct sx8 *state = fe->demodulator_priv;
88 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
92 (state->signal_info.dvbs2_signal_info.channel_power
95 p->strength.stat[0].scale = FE_SCALE_DECIBEL;
96 p->strength.stat[0].svalue = str;
100 static int read_status(struct dvb_frontend *fe, enum fe_status *status)
103 struct sx8 *state = fe->demodulator_priv;
104 struct mci_command cmd;
105 struct mci_result res;
107 cmd.command = MCI_CMD_GETSTATUS;
108 cmd.demod = state->mci.demod;
109 stat = ddb_mci_cmd(&state->mci, &cmd, &res);
115 if (res.status == SX8_DEMOD_WAIT_MATYPE)
117 if (res.status == SX8_DEMOD_LOCKED) {
124 static int mci_set_tuner(struct dvb_frontend *fe, u32 tuner, u32 on)
126 struct sx8 *state = fe->demodulator_priv;
127 struct mci_base *mci_base = state->mci.base;
128 struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
129 struct mci_command cmd;
131 memset(&cmd, 0, sizeof(cmd));
132 cmd.tuner = state->mci.tuner;
133 cmd.command = on ? SX8_CMD_INPUT_ENABLE : SX8_CMD_INPUT_DISABLE;
134 cmd.sx8_input_enable.flags = sx8_base->gain_mode[state->mci.tuner];
135 return ddb_mci_cmd(&state->mci, &cmd, NULL);
138 static int stop(struct dvb_frontend *fe)
140 struct sx8 *state = fe->demodulator_priv;
141 struct mci_base *mci_base = state->mci.base;
142 struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
143 struct mci_command cmd;
144 u32 input = state->mci.tuner;
146 memset(&cmd, 0, sizeof(cmd));
147 if (state->mci.demod != SX8_DEMOD_NONE) {
148 cmd.command = MCI_CMD_STOP;
149 cmd.demod = state->mci.demod;
150 ddb_mci_cmd(&state->mci, &cmd, NULL);
151 if (sx8_base->iq_mode) {
152 cmd.command = SX8_CMD_DISABLE_IQOUTPUT;
153 cmd.demod = state->mci.demod;
155 ddb_mci_cmd(&state->mci, &cmd, NULL);
156 ddb_mci_config(&state->mci, SX8_TSCONFIG_MODE_NORMAL);
159 mutex_lock(&mci_base->tuner_lock);
160 sx8_base->tuner_use_count[input]--;
161 if (!sx8_base->tuner_use_count[input])
162 mci_set_tuner(fe, input, 0);
163 if (state->mci.demod < SX8_DEMOD_NUM) {
164 sx8_base->demod_in_use[state->mci.demod] = 0;
165 state->mci.demod = SX8_DEMOD_NONE;
167 sx8_base->used_ldpc_bitrate[state->mci.nr] = 0;
168 sx8_base->iq_mode = 0;
169 mutex_unlock(&mci_base->tuner_lock);
174 static int start(struct dvb_frontend *fe, u32 flags, u32 modmask, u32 ts_config)
176 struct sx8 *state = fe->demodulator_priv;
177 struct mci_base *mci_base = state->mci.base;
178 struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
179 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
180 u32 used_ldpc_bitrate = 0, free_ldpc_bitrate;
182 struct mci_command cmd;
183 u32 input = state->mci.tuner;
184 u32 bits_per_symbol = 0;
185 int i = -1, stat = 0;
187 if (p->symbol_rate >= (MCLK / 2))
189 if ((flags & 3) == 0)
202 mutex_lock(&mci_base->tuner_lock);
203 if (sx8_base->iq_mode) {
208 if (sx8_base->direct_mode) {
209 if (p->symbol_rate >= MCLK / 2) {
210 if (state->mci.nr < 4)
216 for (i = 0; i < SX8_DEMOD_NUM; i++) {
217 used_ldpc_bitrate += sx8_base->used_ldpc_bitrate[i];
218 if (sx8_base->demod_in_use[i])
221 if (used_ldpc_bitrate >= MAX_LDPC_BITRATE ||
222 ((ts_config & SX8_TSCONFIG_MODE_MASK) >
223 SX8_TSCONFIG_MODE_NORMAL && used_demods > 0)) {
227 free_ldpc_bitrate = MAX_LDPC_BITRATE - used_ldpc_bitrate;
228 if (free_ldpc_bitrate > MAX_DEMOD_LDPC_BITRATE)
229 free_ldpc_bitrate = MAX_DEMOD_LDPC_BITRATE;
231 while (p->symbol_rate * bits_per_symbol > free_ldpc_bitrate)
233 if (bits_per_symbol < 2) {
238 modmask &= ((1 << (bits_per_symbol - 1)) - 1);
239 if (((flags & 0x02) != 0) && modmask == 0) {
244 i = (p->symbol_rate > (MCLK / 2)) ? 3 : 7;
245 while (i >= 0 && sx8_base->demod_in_use[i])
253 sx8_base->demod_in_use[i] = 1;
254 sx8_base->used_ldpc_bitrate[state->mci.nr] = p->symbol_rate
256 state->mci.demod = i;
258 if (!sx8_base->tuner_use_count[input])
259 mci_set_tuner(fe, input, 1);
260 sx8_base->tuner_use_count[input]++;
261 sx8_base->iq_mode = (ts_config > 1);
263 mutex_unlock(&mci_base->tuner_lock);
266 memset(&cmd, 0, sizeof(cmd));
268 if (sx8_base->iq_mode) {
269 cmd.command = SX8_CMD_ENABLE_IQOUTPUT;
270 cmd.demod = state->mci.demod;
272 ddb_mci_cmd(&state->mci, &cmd, NULL);
273 ddb_mci_config(&state->mci, ts_config);
275 if (p->stream_id != NO_STREAM_ID_FILTER && p->stream_id != 0x80000000)
277 dev_dbg(mci_base->dev, "MCI-%d: tuner=%d demod=%d\n",
278 state->mci.nr, state->mci.tuner, state->mci.demod);
279 cmd.command = MCI_CMD_SEARCH_DVBS;
280 cmd.dvbs2_search.flags = flags;
281 cmd.dvbs2_search.s2_modulation_mask = modmask;
282 cmd.dvbs2_search.retry = 2;
283 cmd.dvbs2_search.frequency = p->frequency * 1000;
284 cmd.dvbs2_search.symbol_rate = p->symbol_rate;
285 cmd.dvbs2_search.scrambling_sequence_index =
286 p->scrambling_sequence_index | 0x80000000;
287 cmd.dvbs2_search.input_stream_id =
288 (p->stream_id != NO_STREAM_ID_FILTER) ? p->stream_id : 0;
289 cmd.tuner = state->mci.tuner;
290 cmd.demod = state->mci.demod;
291 cmd.output = state->mci.nr;
292 if (p->stream_id == 0x80000000)
294 stat = ddb_mci_cmd(&state->mci, &cmd, NULL);
300 static int start_iq(struct dvb_frontend *fe, u32 flags, u32 roll_off,
303 struct sx8 *state = fe->demodulator_priv;
304 struct mci_base *mci_base = state->mci.base;
305 struct sx8_base *sx8_base = (struct sx8_base *)mci_base;
306 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
308 struct mci_command cmd;
309 u32 input = state->mci.tuner;
312 mutex_lock(&mci_base->tuner_lock);
313 if (sx8_base->iq_mode) {
317 for (i = 0; i < SX8_DEMOD_NUM; i++)
318 if (sx8_base->demod_in_use[i])
320 if (used_demods > 0) {
324 state->mci.demod = 0;
325 if (!sx8_base->tuner_use_count[input])
326 mci_set_tuner(fe, input, 1);
327 sx8_base->tuner_use_count[input]++;
328 sx8_base->iq_mode = (ts_config > 1);
330 mutex_unlock(&mci_base->tuner_lock);
334 memset(&cmd, 0, sizeof(cmd));
335 cmd.command = SX8_CMD_START_IQ;
336 cmd.sx8_start_iq.flags = flags;
337 cmd.sx8_start_iq.roll_off = roll_off;
338 cmd.sx8_start_iq.frequency = p->frequency * 1000;
339 cmd.sx8_start_iq.symbol_rate = p->symbol_rate;
340 cmd.tuner = state->mci.tuner;
341 cmd.demod = state->mci.demod;
342 stat = ddb_mci_cmd(&state->mci, &cmd, NULL);
345 ddb_mci_config(&state->mci, ts_config);
349 static int set_parameters(struct dvb_frontend *fe)
352 struct sx8 *state = fe->demodulator_priv;
353 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
354 u32 ts_config = SX8_TSCONFIG_MODE_NORMAL, iq_mode = 0, isi;
360 if (isi != NO_STREAM_ID_FILTER)
361 iq_mode = (isi & 0x30000000) >> 28;
364 ts_config = (SX8_TSCONFIG_TSHEADER | SX8_TSCONFIG_MODE_IQ);
368 switch (p->modulation) {
369 /* uncomment whenever these modulations hit the DVB API
390 stat = start(fe, 3, mask, ts_config);
392 stat = start_iq(fe, 0, 4, ts_config);
396 state->first_time_lock = 1;
397 state->signal_info.status = SX8_DEMOD_WAIT_SIGNAL;
403 static int tune(struct dvb_frontend *fe, bool re_tune,
404 unsigned int mode_flags,
405 unsigned int *delay, enum fe_status *status)
410 r = set_parameters(fe);
414 r = read_status(fe, status);
418 if (*status & FE_HAS_LOCK)
424 static enum dvbfe_algo get_algo(struct dvb_frontend *fe)
426 return DVBFE_ALGO_HW;
429 static int set_input(struct dvb_frontend *fe, int input)
431 struct sx8 *state = fe->demodulator_priv;
432 struct mci_base *mci_base = state->mci.base;
434 if (input >= SX8_TUNER_NUM)
437 state->mci.tuner = input;
438 dev_dbg(mci_base->dev, "MCI-%d: input=%d\n", state->mci.nr, input);
442 static struct dvb_frontend_ops sx8_ops = {
443 .delsys = { SYS_DVBS, SYS_DVBS2 },
445 .name = "Digital Devices MaxSX8 MCI DVB-S/S2/S2X",
446 .frequency_min_hz = 950 * MHz,
447 .frequency_max_hz = 2150 * MHz,
448 .symbol_rate_min = 100000,
449 .symbol_rate_max = 100000000,
450 .caps = FE_CAN_INVERSION_AUTO |
453 FE_CAN_2G_MODULATION |
456 .get_frontend_algo = get_algo,
459 .read_status = read_status,
462 static int init(struct mci *mci)
464 struct sx8 *state = (struct sx8 *)mci;
466 state->mci.demod = SX8_DEMOD_NONE;
470 const struct mci_cfg ddb_max_sx8_cfg = {
473 .base_size = sizeof(struct sx8_base),
474 .state_size = sizeof(struct sx8),
476 .set_input = set_input,