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dddvb/ddbridge/ddbridge-mci.c
Ralph Metzler 50cf06cbb8 properly reference dvbs2_signal_info
2017-12-07 19:31:11 +01:00

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/*
* ddbridge-mci.c: Digital Devices microcode interface
*
* Copyright (C) 2017 Digital Devices GmbH
* Ralph Metzler <rjkm@metzlerbros.de>
* Marcus Metzler <mocm@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-mci.h"
static LIST_HEAD(mci_list);
static const u32 MCLK = (1550000000/12);
static const u32 MAX_LDPC_BITRATE = (720000000);
struct mci_base {
struct list_head mci_list;
void *key;
struct ddb_link *link;
struct completion completion;
struct i2c_adapter *i2c;
struct mutex i2c_lock;
struct mutex tuner_lock;
u8 adr;
struct mutex mci_lock;
int count;
u8 tuner_use_count[4];
u8 assigned_demod[8];
u32 used_ldpc_bitrate[8];
u8 demod_in_use[8];
};
struct mci {
struct mci_base *base;
struct dvb_frontend fe;
int nr;
int demod;
int tuner;
int first_time_lock;
int started;
struct mci_result signal_info;
};
static int mci_reset(struct mci *state)
{
struct ddb_link *link = state->base->link;
u32 status = 0;
u32 timeout = 40;
ddblwritel(link, MCI_CONTROL_RESET, MCI_CONTROL);
ddblwritel(link, 0, MCI_CONTROL + 4); /* 1= no internal init */
msleep(300);
ddblwritel(link, 0, MCI_CONTROL);
while(1) {
status = ddblreadl(link, MCI_CONTROL);
if ((status & MCI_CONTROL_READY) == MCI_CONTROL_READY)
break;
if (--timeout == 0)
break;
msleep(50);
}
if ((status & MCI_CONTROL_READY) == 0 )
return -1;
if (link->ids.device == 0x0009)
ddblwritel(link, SX8_TSCONFIG_MODE_NORMAL, SX8_TSCONFIG);
return 0;
}
static int _mci_cmd_unlocked(struct mci *state,
u32 *cmd, u32 cmd_len,
u32 *res, u32 res_len)
{
struct ddb_link *link = state->base->link;
u32 i, val;
unsigned long stat;
val = ddblreadl(link, MCI_CONTROL);
if (val & (MCI_CONTROL_RESET | MCI_CONTROL_START_COMMAND))
return -EIO;
if (cmd && cmd_len)
for (i = 0; i < cmd_len; i++)
ddblwritel(link, cmd[i], MCI_COMMAND + i * 4);
val |= (MCI_CONTROL_START_COMMAND | MCI_CONTROL_ENABLE_DONE_INTERRUPT);
ddblwritel(link, val, MCI_CONTROL);
stat = wait_for_completion_timeout(&state->base->completion, HZ);
if (stat == 0) {
printk("MCI timeout\n");
return -EIO;
}
if (res && res_len)
for (i = 0; i < res_len; i++)
res[i] = ddblreadl(link, MCI_RESULT + i * 4);
return 0;
}
static int mci_cmd_unlocked(struct mci *state,
struct mci_command *command,
struct mci_result *result)
{
u32 *cmd = (u32 *) command;
u32 *res = (u32 *) result;
return _mci_cmd_unlocked(state, cmd, sizeof(*command)/sizeof(u32),
res, sizeof(*result)/sizeof(u32));
}
static int mci_cmd(struct mci *state,
struct mci_command *command,
struct mci_result *result)
{
int stat;
mutex_lock(&state->base->mci_lock);
stat = _mci_cmd_unlocked(state,
(u32 *)command, sizeof(*command)/sizeof(u32),
(u32 *)result, sizeof(*result)/sizeof(u32));
mutex_unlock(&state->base->mci_lock);
return stat;
}
static int _mci_cmd(struct mci *state,
struct mci_command *command, u32 command_len,
struct mci_result *result, u32 result_len)
{
int stat;
mutex_lock(&state->base->mci_lock);
stat = _mci_cmd_unlocked(state,
(u32 *)command, command_len,
(u32 *)result, result_len);
mutex_unlock(&state->base->mci_lock);
return stat;
}
static void mci_handler(void *priv)
{
struct mci_base *base = (struct mci_base *)priv;
complete(&base->completion);
}
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 mci *state = fe->demodulator_priv;
state->base->count--;
if (state->base->count == 0) {
list_del(&state->base->mci_list);
kfree(state->base);
}
kfree(state);
}
static int get_info(struct dvb_frontend *fe)
{
int stat;
struct mci *state = fe->demodulator_priv;
struct mci_command cmd;
cmd.command = SX8_CMD_GETSIGNALINFO;
cmd.demod = state->demod;
stat = mci_cmd(state, &cmd, &state->signal_info);
return stat;
}
static int read_status(struct dvb_frontend *fe, enum fe_status *status)
{
int stat;
struct mci *state = fe->demodulator_priv;
struct mci_command cmd;
u32 val;
struct mci_result *res = (struct mci_result *)&val;
cmd.command = SX8_CMD_GETSTATUS;
cmd.demod = state->demod;
stat = _mci_cmd(state, &cmd, 1, res, 1);
if (stat)
return stat;
if (res->status == SX8_DEMOD_LOCKED)
*status = 0x1f;
else
*status = 0;
return stat;
}
static int mci_set_tuner(struct dvb_frontend *fe, u32 tuner, u32 on)
{
struct mci *state = fe->demodulator_priv;
struct mci_command cmd;
memset(&cmd, 0, sizeof(cmd));
cmd.tuner = state->tuner;
cmd.command = on ? SX8_CMD_TUNER_ENABLE : SX8_CMD_TUNER_DISABLE;
return mci_cmd(state, &cmd, NULL);
}
static int stop(struct dvb_frontend *fe)
{
struct mci *state = fe->demodulator_priv;
struct mci_command cmd;
u32 input = state->tuner;
if (state->demod != 0xff) {
memset(&cmd, 0, sizeof(cmd));
cmd.demod = state->demod;
cmd.command = SX8_CMD_STOP;
mci_cmd(state, &cmd, NULL);
}
mutex_lock(&state->base->tuner_lock);
state->base->tuner_use_count[input]--;
if (!state->base->tuner_use_count[input])
mci_set_tuner(fe, input, 0);
state->base->demod_in_use[state->demod] = 0;
state->base->used_ldpc_bitrate[state->nr] = 0;
state->demod = 0xff;
state->base->assigned_demod[state->nr] = 0xff;
mutex_unlock(&state->base->tuner_lock);
state->started = 0;
return 0;
}
static int start(struct dvb_frontend *fe)
{
struct mci *state = fe->demodulator_priv;
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;
struct mci_command cmd;
u32 input = state->tuner;
u32 bits_per_symbol = 3;
int i, stat = 0;
mutex_lock(&state->base->tuner_lock);
for (i = 0; i < 8; i++)
used_ldpc_bitrate += state->base->used_ldpc_bitrate[i];
if (used_ldpc_bitrate >= MAX_LDPC_BITRATE) {
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 > MAX_DEMOD_LDPC_BITRATE)
bits_per_symbol--;
if (bits_per_symbol < 2) {
stat = -EBUSY;
goto unlock;
}
i = (p->symbol_rate > MCLK / 2) ? 3 : 7;
while (i >= 0 && state->base->demod_in_use[i])
i--;
if (i < 0) {
stat = -EBUSY;
goto unlock;
}
state->base->demod_in_use[i] = 1;
state->base->used_ldpc_bitrate[state->nr] = p->symbol_rate * bits_per_symbol;
state->demod = state->base->assigned_demod[state->nr] = i;
if (!state->base->tuner_use_count[input])
mci_set_tuner(fe, input, 1);
state->base->tuner_use_count[input]++;
unlock:
mutex_unlock(&state->base->tuner_lock);
if (stat)
return stat;
printk("frontend %u: tuner=%u demod=%u\n", state->nr, state->tuner, state->demod);
cmd.command = SX8_CMD_SEARCH;
cmd.dvbs2_search.flags = 3; /* S1 + S2 */
#if 1
/* Enable all Modcods up to bits_per_symbol */
cmd.dvbs2_search.s2_modulation_mask = (1 << (bits_per_symbol - 1)) - 1;
#else
/* Enable Modcods matching bits_per_symbol */
cmd.dvbs2_search.s2_modulation_mask = (1 << (bits_per_symbol - 2));
#endif
cmd.dvbs2_search.retry = 255; /* forever */
cmd.dvbs2_search.frequency = p->frequency * 1000;
cmd.dvbs2_search.symbol_rate = p->symbol_rate;
cmd.tuner = state->tuner;
cmd.demod = state->demod;
cmd.output = state->nr;
stat = mci_cmd(state, &cmd, NULL);
return stat;
}
static int set_parameters(struct dvb_frontend *fe)
{
int stat = 0;
struct mci *state = fe->demodulator_priv;
if (state->started)
stop(fe);
stat = start(fe);
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 int get_algo(struct dvb_frontend *fe)
{
return DVBFE_ALGO_HW;
}
static int set_input(struct dvb_frontend *fe, int input)
{
struct mci *state = fe->demodulator_priv;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
state->tuner = p->input = input;
printk("fe %u, input = %u\n", state->nr, input);
return 0;
}
static int sleep(struct dvb_frontend *fe)
{
struct mci *state = fe->demodulator_priv;
}
static int get_snr(struct dvb_frontend *fe)
{
struct mci *state = fe->demodulator_priv;
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
s32 snr;
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 * 100;
return 0;
}
static int get_strength(struct dvb_frontend *fe)
{
struct mci *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 struct dvb_frontend_ops mci_ops = {
.delsys = { SYS_DVBS, SYS_DVBS2 },
.info = {
.name = "DVB-S/S2X",
.frequency_min = 950000,
.frequency_max = 2150000,
.frequency_stepsize = 0,
.frequency_tolerance = 0,
.symbol_rate_min = 100000,
.symbol_rate_max = 70000000,
.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,
.set_input = set_input,
};
static struct mci_base *match_base(void *key)
{
struct mci_base *p;
list_for_each_entry(p, &mci_list, mci_list)
if (p->key == key)
return p;
return NULL;
}
static int probe(struct mci *state)
{
mci_reset(state);
return 0;
}
struct dvb_frontend *ddb_mci_attach(struct ddb_input *input, int mci_type, int nr)
{
struct ddb_port *port = input->port;
struct ddb *dev = port->dev;
struct ddb_link *link = &dev->link[port->lnr];
struct mci_base *base;
struct mci *state;
void *key = mci_type ? (void *) port : (void *) link;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
base = match_base(key);
if (base) {
base->count++;
state->base = base;
} else {
base = kzalloc(sizeof(*base), GFP_KERNEL);
if (!base)
goto fail;
base->key = key;
base->count = 1;
base->link = link;
mutex_init(&base->mci_lock);
mutex_init(&base->tuner_lock);
ddb_irq_set(dev, link->nr, 0, mci_handler, base);
init_completion(&base->completion);
state->base = base;
if (probe(state) < 0) {
kfree(base);
goto fail;
}
list_add(&base->mci_list, &mci_list);
}
state->fe.ops = mci_ops;
state->fe.demodulator_priv = state;
state->nr = nr;
state->tuner = nr;
state->demod = nr;
return &state->fe;
fail:
kfree(state);
return NULL;
}
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