aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/pci/ddbridge/ddbridge-sx8.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/pci/ddbridge/ddbridge-sx8.c')
-rw-r--r--drivers/media/pci/ddbridge/ddbridge-sx8.c488
1 files changed, 488 insertions, 0 deletions
diff --git a/drivers/media/pci/ddbridge/ddbridge-sx8.c b/drivers/media/pci/ddbridge/ddbridge-sx8.c
new file mode 100644
index 000000000000..64f05f5ee039
--- /dev/null
+++ b/drivers/media/pci/ddbridge/ddbridge-sx8.c
@@ -0,0 +1,488 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 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.
+ */
+
+#include "ddbridge.h"
+#include "ddbridge-io.h"
+#include "ddbridge-mci.h"
+
+static const u32 MCLK = (1550000000 / 12);
+static const u32 MAX_LDPC_BITRATE = (720000000);
+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;
+ struct mci_result signal_info;
+
+ u32 bb_mode;
+ u32 local_frequency;
+};
+
+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 get_info(struct dvb_frontend *fe)
+{
+ int stat;
+ struct sx8 *state = fe->demodulator_priv;
+ struct mci_command cmd;
+
+ memset(&cmd, 0, sizeof(cmd));
+ cmd.command = MCI_CMD_GETSIGNALINFO;
+ cmd.demod = state->mci.demod;
+ stat = ddb_mci_cmd(&state->mci, &cmd, &state->signal_info);
+ return stat;
+}
+
+static int get_snr(struct dvb_frontend *fe)
+{
+ struct sx8 *state = fe->demodulator_priv;
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+
+ p->cnr.len = 1;
+ p->cnr.stat[0].scale = FE_SCALE_DECIBEL;
+ p->cnr.stat[0].svalue =
+ (s64)state->signal_info.dvbs2_signal_info.signal_to_noise
+ * 10;
+ return 0;
+}
+
+static int get_strength(struct dvb_frontend *fe)
+{
+ struct sx8 *state = fe->demodulator_priv;
+ struct dtv_frontend_properties *p = &fe->dtv_property_cache;
+ s32 str;
+
+ str = 100000 -
+ (state->signal_info.dvbs2_signal_info.channel_power
+ * 10 + 108750);
+ p->strength.len = 1;
+ p->strength.stat[0].scale = FE_SCALE_DECIBEL;
+ p->strength.stat[0].svalue = str;
+ return 0;
+}
+
+static int read_status(struct dvb_frontend *fe, enum fe_status *status)
+{
+ int stat;
+ struct sx8 *state = fe->demodulator_priv;
+ struct mci_command cmd;
+ struct mci_result res;
+
+ cmd.command = MCI_CMD_GETSTATUS;
+ cmd.demod = state->mci.demod;
+ stat = ddb_mci_cmd(&state->mci, &cmd, &res);
+ if (stat)
+ return stat;
+ *status = 0x00;
+ get_info(fe);
+ get_strength(fe);
+ if (res.status == SX8_DEMOD_WAIT_MATYPE)
+ *status = 0x0f;
+ if (res.status == SX8_DEMOD_LOCKED) {
+ *status = 0x1f;
+ get_snr(fe);
+ }
+ 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(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;
+
+ 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_NUM) {
+ 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;
+ 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;
+
+ 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 = 0;
+ 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 != 0x80000000)
+ flags |= 0x80;
+ dev_dbg(mci_base->dev, "MCI-%d: tuner=%d demod=%d\n",
+ state->mci.nr, state->mci.tuner, state->mci.demod);
+ 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 != NO_STREAM_ID_FILTER) ? p->stream_id : 0;
+ 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;
+
+ 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;
+ 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.tuner = state->mci.tuner;
+ cmd.demod = state->mci.demod;
+ stat = ddb_mci_cmd(&state->mci, &cmd, NULL);
+ if (stat)
+ stop(fe);
+ ddb_mci_config(&state->mci, ts_config);
+ return stat;
+}
+
+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;
+
+ if (state->started)
+ stop(fe);
+
+ 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);
+ if (iq_mode < 3) {
+ u32 mask;
+
+ switch (p->modulation) {
+ /* uncomment whenever these modulations hit the DVB API
+ * 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 = 0x03;
+ break;
+ }
+ stat = start(fe, 3, mask, ts_config);
+ } else {
+ u32 flags = (iq_mode == 2) ? 1 : 0;
+
+ stat = start_iq(fe, flags, 4, ts_config);
+ }
+ if (!stat) {
+ state->started = 1;
+ state->first_time_lock = 1;
+ state->signal_info.status = SX8_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 enum dvbfe_algo 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 mci_base *mci_base = state->mci.base;
+
+ if (input >= SX8_TUNER_NUM)
+ return -EINVAL;
+
+ state->mci.tuner = input;
+ dev_dbg(mci_base->dev, "MCI-%d: input=%d\n", state->mci.nr, input);
+ return 0;
+}
+
+static struct dvb_frontend_ops sx8_ops = {
+ .delsys = { SYS_DVBS, SYS_DVBS2 },
+ .info = {
+ .name = "Digital Devices MaxSX8 MCI DVB-S/S2/S2X",
+ .frequency_min_hz = 950 * MHz,
+ .frequency_max_hz = 2150 * MHz,
+ .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,
+ .tune = tune,
+ .release = release,
+ .read_status = read_status,
+};
+
+static int init(struct mci *mci)
+{
+ struct sx8 *state = (struct sx8 *)mci;
+
+ state->mci.demod = SX8_DEMOD_NONE;
+ return 0;
+}
+
+const 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,
+ .set_input = set_input,
+};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.