cellular-infrastructure
/
osmo-bts
mirror of https://gerrit.osmocom.org/osmo-bts
9
0
Fork 0
Code Issues Releases Wiki Activity

TRX: Introduce osmobts-trx, a layer 1 implementation for OpenBTS tranceivers 

The code is quite complete, TCH and PDCH channels are not yet tested.
This commit is contained in:
Andreas Eversberg 2013-02-05 11:45:28 +01:00 committed by Harald Welte
parent c64fa4f888
commit acc71ffb4b
26 changed files with 5176 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
.gitignore vendored
View File

@ -29,6 +29,7 @@ src/osmo-bts-sysmo/sysmobts
src/osmo-bts-sysmo/sysmobts-remote
src/osmo-bts-sysmo/sysmobts-mgr
src/osmo-bts-trx/osmobts-trx
tests/atconfig
tests/package.m4

9
configure.ac
View File

@ -37,6 +37,14 @@ AC_ARG_ENABLE(sysmocom-bts,
AC_MSG_RESULT([$enable_sysmocom_bts])
AM_CONDITIONAL(ENABLE_SYSMOBTS, test "x$enable_sysmocom_bts" = "xyes")
AC_MSG_CHECKING([whether to enable trx hardware support])
AC_ARG_ENABLE(trx,
AC_HELP_STRING([--enable-trx],
[enable code for trx hardware [default=no]]),
[enable_trx="yes"],[enable_trx="no"])
AC_MSG_RESULT([$enable_trx])
AM_CONDITIONAL(ENABLE_TRX, test "x$enable_trx" = "xyes")
# We share gsm_data.h with OpenBSC and need to be pointed to the source
# directory of OpenBSC for now.
AC_ARG_WITH([openbsc],
@ -70,6 +78,7 @@ AC_OUTPUT(
src/Makefile
src/common/Makefile
src/osmo-bts-sysmo/Makefile
src/osmo-bts-trx/Makefile
include/Makefile
include/osmo-bts/Makefile
tests/Makefile

7
include/osmo-bts/gsm_data.h
View File

@ -115,6 +115,13 @@ static inline struct femtol1_hdl *trx_femtol1_hdl(struct gsm_bts_trx *trx)
return trx->role_bts.l1h;
}
struct trx_l1h;
static inline struct trx_l1h *trx_l1h_hdl(struct gsm_bts_trx *trx)
{
return trx->role_bts.l1h;
}
void lchan_set_state(struct gsm_lchan *lchan, enum gsm_lchan_state state);

1
include/osmo-bts/logging.h
View File

@ -16,6 +16,7 @@ enum {
DDSP,
DPCU,
DHO,
DTRX,
DABIS,
DRTP,
DSUM,

2
include/osmo-bts/rsl.h
View File

@ -11,6 +11,8 @@ enum {
LCHAN_REL_ACT_OML,
};
int msgb_queue_flush(struct llist_head *list);
int down_rsl(struct gsm_bts_trx *trx, struct msgb *msg);
int rsl_tx_rf_res(struct gsm_bts_trx *trx);
int rsl_tx_chan_rqd(struct gsm_bts_trx *trx, struct gsm_time *gtime,

3
src/Makefile.am
View File

@ -3,3 +3,6 @@ SUBDIRS = common
if ENABLE_SYSMOBTS
SUBDIRS += osmo-bts-sysmo
endif
if ENABLE_TRX
SUBDIRS += osmo-bts-trx
endif

6
src/common/logging.c
View File

@ -107,6 +107,12 @@ static struct log_info_cat bts_log_info_cat[] = {
.color = "\033[0;37m",
.enabled = 1, .loglevel = LOGL_NOTICE,
},
[DTRX] = {
.name = "DTRX",
.description = "TRX interface",
.color = "\033[1;33m",
.enabled = 1, .loglevel = LOGL_NOTICE,
},
#if 0
[DNS] = {
.name = "DNS",

11
src/osmo-bts-trx/Makefile.am Normal file
View File

@ -0,0 +1,11 @@
INCLUDES = $(all_includes) -I$(top_srcdir)/include -I$(OPENBSC_INCDIR)
AM_CFLAGS = -Wall -fno-strict-aliasing $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_CFLAGS) $(LIBOSMOVTY_CFLAGS) $(LIBOSMOTRAU_CFLAGS) $(LIBOSMOABIS_CFLAGS)
LDADD = $(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS) $(LIBOSMOVTY_LIBS) $(LIBOSMOTRAU_LIBS) $(LIBOSMOABIS_LIBS) -lortp
EXTRA_DIST = trx_if.h l1_if.h scheduler.h xcch.h rach.h sch.h pxxch.h tch_fr.h
bin_PROGRAMS = osmobts-trx
osmobts_trx_SOURCES = main.c trx_if.c l1_if.c scheduler.c trx_vty.c xcch.c rach.c sch.c pxxch.c tch_fr.c
osmobts_trx_LDADD = $(top_builddir)/src/common/libbts.a $(LDADD)

571
src/osmo-bts-trx/l1_if.c Normal file
View File

@ -0,0 +1,571 @@
/*
* layer 1 primitive handling and interface
*
* Copyright (C) 2013 Andreas Eversberg <jolly@eversberg.eu>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/bits.h>
#include <osmo-bts/logging.h>
#include <osmo-bts/bts.h>
#include <osmo-bts/oml.h>
#include <osmo-bts/rsl.h>
#include <osmo-bts/l1sap.h>
#include <osmo-bts/bts_model.h>
#include "l1_if.h"
#include "trx_if.h"
#include "scheduler.h"
static const uint8_t tranceiver_chan_types[_GSM_PCHAN_MAX] = {
[GSM_PCHAN_NONE] = 8,
[GSM_PCHAN_CCCH] = 6,
[GSM_PCHAN_CCCH_SDCCH4] = 5,
[GSM_PCHAN_TCH_F] = 1,
[GSM_PCHAN_TCH_H] = 2,
[GSM_PCHAN_SDCCH8_SACCH8C] = 7,
[GSM_PCHAN_PDCH] = 13,
//[GSM_PCHAN_TCH_F_PDCH] = FIXME,
[GSM_PCHAN_UNKNOWN] = 0,
};
/*
* create destroy trx l1 instance
*/
struct trx_l1h *l1if_open(struct gsm_bts_trx *trx)
{
struct trx_l1h *l1h;
int rc;
l1h = talloc_zero(tall_bts_ctx, struct trx_l1h);
if (!l1h)
return NULL;
l1h->trx = trx;
trx->role_bts.l1h = l1h;
trx_sched_init(l1h);
rc = trx_if_open(l1h);
if (rc < 0) {
LOGP(DL1C, LOGL_FATAL, "Cannot initialize scheduler\n");
goto err;
}
return l1h;
err:
l1if_close(l1h);
return NULL;
}
void l1if_close(struct trx_l1h *l1h)
{
trx_if_close(l1h);
trx_sched_exit(l1h);
talloc_free(l1h);
}
void l1if_reset(struct trx_l1h *l1h)
{
}
void check_tranceiver_availability(struct trx_l1h *l1h)
{
struct gsm_bts_trx *trx = l1h->trx;
uint8_t tn;
/* HACK, we should change state when we receive first clock from
* tranceiver */
if (1) {
/* signal availability */
oml_mo_state_chg(&trx->mo, NM_OPSTATE_DISABLED, NM_AVSTATE_OK);
oml_mo_tx_sw_act_rep(&trx->mo);
oml_mo_state_chg(&trx->bb_transc.mo, -1, NM_AVSTATE_OK);
oml_mo_tx_sw_act_rep(&trx->bb_transc.mo);
for (tn = 0; tn < 8; tn++)
oml_mo_state_chg(&trx->ts[tn].mo, NM_OPSTATE_DISABLED,
(l1h->config.slotmask & (1 << tn)) ?
NM_AVSTATE_DEPENDENCY :
NM_AVSTATE_NOT_INSTALLED);
} else {
oml_mo_state_chg(&trx->mo, NM_OPSTATE_DISABLED,
NM_AVSTATE_OFF_LINE);
oml_mo_state_chg(&trx->bb_transc.mo, NM_OPSTATE_DISABLED,
NM_AVSTATE_OFF_LINE);
}
}
/*
* tranceiver provisioning
*/
int l1if_provision_tranceiver_trx(struct trx_l1h *l1h)
{
uint8_t tn;
if (l1h->config.poweron
&& l1h->config.tsc_valid
&& l1h->config.bsic_valid
&& l1h->config.arfcn_valid) {
/* before power on */
if (l1h->config.arfcn_valid && !l1h->config.arfcn_sent) {
trx_if_cmd_rxtune(l1h, l1h->config.arfcn);
trx_if_cmd_txtune(l1h, l1h->config.arfcn);
l1h->config.arfcn_sent = 1;
}
if (l1h->config.tsc_valid && !l1h->config.tsc_sent) {
trx_if_cmd_settsc(l1h, l1h->config.tsc);
l1h->config.tsc_sent = 1;
}
if (l1h->config.bsic_valid && !l1h->config.bsic_sent) {
trx_if_cmd_setbsic(l1h, l1h->config.bsic);
l1h->config.bsic_sent = 1;
}
if (!l1h->config.poweron_sent) {
trx_if_cmd_poweron(l1h);
l1h->config.poweron_sent = 1;
}
/* after power on */
if (l1h->config.rxgain_valid && !l1h->config.rxgain_sent) {
trx_if_cmd_setrxgain(l1h, l1h->config.rxgain);
l1h->config.rxgain_sent = 1;
}
if (l1h->config.power_valid && !l1h->config.power_sent) {
trx_if_cmd_setpower(l1h, l1h->config.power);
l1h->config.power_sent = 1;
}
if (l1h->config.maxdly_valid && !l1h->config.maxdly_sent) {
trx_if_cmd_setmaxdly(l1h, l1h->config.maxdly);
l1h->config.maxdly_sent = 1;
}
for (tn = 0; tn < 8; tn++) {
if (l1h->config.slottype_valid[tn]
&& !l1h->config.slottype_sent[tn]) {
trx_if_cmd_setslot(l1h, tn,
l1h->config.slottype[tn]);
l1h->config.slottype_sent[tn] = 1;
}
}
return 0;
}
if (!l1h->config.poweron && !l1h->config.poweron_sent) {
trx_if_cmd_poweroff(l1h);
l1h->config.poweron_sent = 1;
l1h->config.rxgain_sent = 0;
l1h->config.power_sent = 0;
l1h->config.maxdly_sent = 0;
for (tn = 0; tn < 8; tn++)
l1h->config.slottype_sent[tn] = 0;
}
return 0;
}
int l1if_provision_tranceiver(struct gsm_bts *bts)
{
struct gsm_bts_trx *trx;
struct trx_l1h *l1h;
llist_for_each_entry(trx, &bts->trx_list, list) {
l1h = trx_l1h_hdl(trx);
l1h->config.arfcn_sent = 0;
l1h->config.tsc_sent = 0;
l1h->config.bsic_sent = 0;
l1h->config.poweron_sent = 0;
l1h->config.rxgain_sent = 0;
l1h->config.power_sent = 0;
l1h->config.maxdly_sent = 0;
l1if_provision_tranceiver_trx(l1h);
}
return 0;
}
/*
* activation/configuration/deactivation of tranceiver's TRX
*/
/* initialize the layer1 */
static int trx_init(struct gsm_bts_trx *trx)
{
struct trx_l1h *l1h = trx_l1h_hdl(trx);
/* power on tranceiver, if not already */
if (!l1h->config.poweron) {
l1h->config.poweron = 1;
l1h->config.poweron_sent = 0;
l1if_provision_tranceiver_trx(l1h);
}
if (trx == trx->bts->c0)
lchan_init_lapdm(&trx->ts[0].lchan[4]);
/* Set to Operational State: Enabled */
oml_mo_state_chg(&trx->mo, NM_OPSTATE_ENABLED, NM_AVSTATE_OK);
/* Send OPSTART ack */
return oml_mo_opstart_ack(&trx->mo);
}
/* deactivate tranceiver */
static int trx_close(struct gsm_bts_trx *trx)
{
struct trx_l1h *l1h = trx_l1h_hdl(trx);
if (l1h->config.poweron) {
l1h->config.poweron = 0;
l1h->config.poweron_sent = 0;
l1if_provision_tranceiver_trx(l1h);
}
return 0;
}
/* set bts attributes */
static uint8_t trx_set_bts(struct gsm_bts *bts)
{
struct gsm_bts_trx *trx;
struct trx_l1h *l1h;
uint8_t bsic = bts->bsic;
llist_for_each_entry(trx, &bts->trx_list, list) {
l1h = trx_l1h_hdl(trx);
if (l1h->config.bsic != bsic || !l1h->config.bsic_valid) {
l1h->config.bsic = bsic;
l1h->config.bsic_valid = 1;
l1h->config.bsic_sent = 0;
}
check_tranceiver_availability(l1h);
}
return 0;
}
/* set trx attributes */
static uint8_t trx_set_trx(struct gsm_bts_trx *trx)
{
struct trx_l1h *l1h = trx_l1h_hdl(trx);
uint16_t arfcn = trx->arfcn;
if (l1h->config.arfcn != arfcn || !l1h->config.arfcn_valid) {
l1h->config.arfcn = arfcn;
l1h->config.arfcn_valid = 1;
l1h->config.arfcn_sent = 0;
}
return 0;
}
/* set ts attributes */
static uint8_t trx_set_ts(struct gsm_bts_trx_ts *ts)
{
struct trx_l1h *l1h = trx_l1h_hdl(ts->trx);
uint8_t tn = ts->nr;
uint16_t tsc = ts->tsc;
enum gsm_phys_chan_config pchan = ts->pchan;
uint8_t slottype;
int rc;
/* all TSC of all timeslots must be equal, because tranceiver only
* supports one TSC per TRX */
if (l1h->config.tsc != tsc || !l1h->config.tsc_valid) {
l1h->config.tsc = tsc;
l1h->config.tsc_valid = 1;
l1h->config.tsc_sent = 0;
}
/* set physical channel */
rc = trx_sched_set_pchan(l1h, tn, pchan);
if (rc)
return NM_NACK_RES_NOTAVAIL;
slottype = tranceiver_chan_types[pchan];
if (l1h->config.slottype[tn] != slottype
|| !l1h->config.slottype_valid[tn]) {
l1h->config.slottype[tn] = slottype;
l1h->config.slottype_valid[tn] = 1;
l1h->config.slottype_sent[tn] = 0;
l1if_provision_tranceiver_trx(l1h);
}
return 0;
}
/*
* primitive handling
*/
/* enable ciphering */
static int l1if_set_ciphering(struct trx_l1h *l1h, struct gsm_lchan *lchan,
int downlink)
{
// FIXME
return 0;
}
/* channel mode, encryption and/or multirate have changed */
static int l1if_rsl_mode_modify(struct trx_l1h *l1h, struct gsm_lchan *lchan,
int downlink)
{
// FIXME
return 0;
}
static int mph_info_chan_confirm(struct trx_l1h *l1h, uint8_t chan_nr,
enum osmo_mph_info_type type, uint8_t cause)
{
struct osmo_phsap_prim l1sap;
memset(&l1sap, 0, sizeof(l1sap));
osmo_prim_init(&l1sap.oph, SAP_GSM_PH, PRIM_MPH_INFO, PRIM_OP_CONFIRM,
NULL);
l1sap.u.info.type = type;
l1sap.u.info.u.act_cnf.chan_nr = chan_nr;
l1sap.u.info.u.act_cnf.cause = cause;
return l1sap_up(l1h->trx, &l1sap);
}
int l1if_mph_time_ind(struct gsm_bts *bts, uint32_t fn)
{
struct osmo_phsap_prim l1sap;
memset(&l1sap, 0, sizeof(l1sap));
osmo_prim_init(&l1sap.oph, SAP_GSM_PH, PRIM_MPH_INFO,
PRIM_OP_INDICATION, NULL);
l1sap.u.info.type = PRIM_INFO_TIME;
l1sap.u.info.u.time_ind.fn = fn;
if (!bts->c0)
return -EINVAL;
return l1sap_up(bts->c0, &l1sap);
}
/* primitive from common part */
int bts_model_l1sap_down(struct gsm_bts_trx *trx, struct osmo_phsap_prim *l1sap)
{
struct trx_l1h *l1h = trx_l1h_hdl(trx);
struct msgb *msg = l1sap->oph.msg;
uint8_t chan_nr;
uint8_t tn, ss;
int rc = 0;
struct gsm_lchan *lchan;
switch (OSMO_PRIM_HDR(&l1sap->oph)) {
case OSMO_PRIM(PRIM_PH_DATA, PRIM_OP_REQUEST):
if (!msg)
break;
/* put data into scheduler's queue */
return trx_sched_ph_data_req(l1h, l1sap);
case OSMO_PRIM(PRIM_TCH, PRIM_OP_REQUEST):
if (!msg)
break;
/* put data into scheduler's queue */
return trx_sched_tch_req(l1h, l1sap);
case OSMO_PRIM(PRIM_MPH_INFO, PRIM_OP_REQUEST):
switch (l1sap->u.info.type) {
case PRIM_INFO_ACT_CIPH:
chan_nr = l1sap->u.info.u.ciph_req.chan_nr;
tn = L1SAP_CHAN2TS(chan_nr);
ss = l1sap_chan2ss(chan_nr);
lchan = &trx->ts[tn].lchan[ss];
if (l1sap->u.info.u.ciph_req.downlink) {
l1if_set_ciphering(l1h, lchan, 1);
lchan->ciph_state = LCHAN_CIPH_RX_REQ;
}
if (l1sap->u.info.u.ciph_req.uplink) {
l1if_set_ciphering(l1h, lchan, 0);
lchan->ciph_state = LCHAN_CIPH_TXRX_REQ;
}
break;
case PRIM_INFO_ACTIVATE:
case PRIM_INFO_DEACTIVATE:
case PRIM_INFO_MODIFY:
chan_nr = l1sap->u.info.u.act_req.chan_nr;
tn = L1SAP_CHAN2TS(chan_nr);
ss = l1sap_chan2ss(chan_nr);
lchan = &trx->ts[tn].lchan[ss];
if (l1sap->u.info.type == PRIM_INFO_ACTIVATE) {
if ((chan_nr & 0x80)) {
LOGP(DL1C, LOGL_ERROR, "Cannot activate"
" chan_nr 0x%02x\n", chan_nr);
break;
}
/* activate dedicated channel */
trx_sched_set_lchan(l1h, chan_nr, 0x00, 0, 1);
trx_sched_set_lchan(l1h, chan_nr, 0x00, 1, 1);
trx_sched_set_lchan(l1h, chan_nr, 0x40, 0, 1);
trx_sched_set_lchan(l1h, chan_nr, 0x40, 1, 1);
/* init lapdm */
lchan_init_lapdm(lchan);
/* confirm */
mph_info_chan_confirm(l1h, chan_nr,
PRIM_INFO_ACTIVATE, 0);
break;
}
if (l1sap->u.info.type == PRIM_INFO_MODIFY) {
l1if_rsl_mode_modify(l1h, lchan, 0);
l1if_rsl_mode_modify(l1h, lchan, 1);
break;
}
if ((chan_nr & 0x80)) {
LOGP(DL1C, LOGL_ERROR, "Cannot deactivate "
"chan_nr 0x%02x\n", chan_nr);
break;
}
/* deactivate dedicated channel */
if (!l1sap->u.info.u.act_req.sacch_only) {
trx_sched_set_lchan(l1h, chan_nr, 0x00, 0, 0);
trx_sched_set_lchan(l1h, chan_nr, 0x00, 1, 0);
}
trx_sched_set_lchan(l1h, chan_nr, 0x40, 0, 0);
trx_sched_set_lchan(l1h, chan_nr, 0x40, 1, 0);
/* confirm */
mph_info_chan_confirm(l1h, chan_nr,
PRIM_INFO_DEACTIVATE, 0);
break;
default:
LOGP(DL1C, LOGL_NOTICE, "unknown MPH-INFO.req %d\n",
l1sap->u.info.type);
rc = -EINVAL;
goto done;
}
break;
default:
LOGP(DL1C, LOGL_NOTICE, "unknown prim %d op %d\n",
l1sap->oph.primitive, l1sap->oph.operation);
rc = -EINVAL;
goto done;
}
done:
if (msg)
msgb_free(msg);
return rc;
}
/*
* oml handling
*/
/* callback from OML */
int bts_model_check_oml(struct gsm_bts *bts, uint8_t msg_type,
struct tlv_parsed *old_attr, struct tlv_parsed *new_attr,
void *obj)
{
/* FIXME: check if the attributes are valid */
return 0;
}
/* callback from OML */
int bts_model_apply_oml(struct gsm_bts *bts, struct msgb *msg,
struct tlv_parsed *new_attr, int kind, void *obj)
{
struct abis_om_fom_hdr *foh = msgb_l3(msg);
int cause = 0;
switch (foh->msg_type) {
case NM_MT_SET_BTS_ATTR:
cause = trx_set_bts(obj);
break;
case NM_MT_SET_RADIO_ATTR:
cause = trx_set_trx(obj);
break;
case NM_MT_SET_CHAN_ATTR:
cause = trx_set_ts(obj);
break;
}
return oml_fom_ack_nack(msg, cause);
}
/* callback from OML */
int bts_model_opstart(struct gsm_bts *bts, struct gsm_abis_mo *mo,
void *obj)
{
int rc;
switch (mo->obj_class) {
case NM_OC_RADIO_CARRIER:
/* activate tranceiver */
rc = trx_init(obj);
break;
case NM_OC_CHANNEL:
/* configure timeslot */
rc = 0; //ts_connect(obj);
/* Set to Operational State: Enabled */
oml_mo_state_chg(mo, NM_OPSTATE_ENABLED, NM_AVSTATE_OK);
/* Send OPSTART ack */
rc = oml_mo_opstart_ack(mo);
break;
case NM_OC_BTS:
case NM_OC_SITE_MANAGER:
case NM_OC_BASEB_TRANSC:
case NM_OC_GPRS_NSE:
case NM_OC_GPRS_CELL:
case NM_OC_GPRS_NSVC:
oml_mo_state_chg(mo, NM_OPSTATE_ENABLED, -1);
rc = oml_mo_opstart_ack(mo);
break;
default:
rc = oml_mo_opstart_nack(mo, NM_NACK_OBJCLASS_NOTSUPP);
}
return rc;
}
int bts_model_chg_adm_state(struct gsm_bts *bts, struct gsm_abis_mo *mo,
void *obj, uint8_t adm_state)
{
/* blindly accept all state changes */
mo->nm_state.administrative = adm_state;
return oml_mo_statechg_ack(mo);
}
int bts_model_trx_deact_rf(struct gsm_bts_trx *trx)
{
return trx_close(trx);
}
int bts_model_oml_estab(struct gsm_bts *bts)
{
return 0;
}

121
src/osmo-bts-trx/l1_if.h Normal file
View File

@ -0,0 +1,121 @@
#ifndef L1_IF_H_TRX
#define L1_IF_H_TRX
/* These types define the different channels on a multiframe.
* Each channel has queues and can be activated individually.
*/
enum trx_chan_type {
TRXC_IDLE = 0,
TRXC_FCCH,
TRXC_SCH,
TRXC_BCCH,
TRXC_RACH,
TRXC_CCCH,
TRXC_TCHF,
TRXC_TCHH_0,
TRXC_TCHH_1,
TRXC_SDCCH4_0,
TRXC_SDCCH4_1,
TRXC_SDCCH4_2,
TRXC_SDCCH4_3,
TRXC_SDCCH8_0,
TRXC_SDCCH8_1,
TRXC_SDCCH8_2,
TRXC_SDCCH8_3,
TRXC_SDCCH8_4,
TRXC_SDCCH8_5,
TRXC_SDCCH8_6,
TRXC_SDCCH8_7,
TRXC_SACCHTF,
TRXC_SACCHTH_0,
TRXC_SACCHTH_1,
TRXC_SACCH4_0,
TRXC_SACCH4_1,
TRXC_SACCH4_2,
TRXC_SACCH4_3,
TRXC_SACCH8_0,
TRXC_SACCH8_1,
TRXC_SACCH8_2,
TRXC_SACCH8_3,
TRXC_SACCH8_4,
TRXC_SACCH8_5,
TRXC_SACCH8_6,
TRXC_SACCH8_7,
TRXC_PDTCH,
TRXC_PTCCH,
_TRX_CHAN_MAX
};
/* States each channel on a multiframe */
struct trx_chan_state {
uint8_t dl_active; /* Channel is active for TX */
uint8_t ul_active; /* Channel is active for RX */
ubit_t *dl_bursts; /* burst buffer for TX */
sbit_t *ul_bursts; /* burst buffer for RX */
uint32_t ul_first_fn; /* fn of first burst */
uint8_t ul_mask; /* mask of received bursts */
uint8_t sacch_lost; /* SACCH loss detection */
};
struct trx_config {
uint8_t poweron; /* poweron(1) or poweroff(0) */
int poweron_sent;
int arfcn_valid;
uint16_t arfcn;
int arfcn_sent;
int tsc_valid;
uint8_t tsc;
int tsc_sent;
int bsic_valid;
uint8_t bsic;
int bsic_sent;
int rxgain_valid;
int rxgain;
int rxgain_sent;
int power_valid;
int power;
int power_sent;
int maxdly_valid;
int maxdly;
int maxdly_sent;
uint8_t slotmask;
int slottype_valid[8];
uint8_t slottype[8];
int slottype_sent[8];
};
struct trx_l1h {
struct llist_head trx_ctrl_list;
struct gsm_bts_trx *trx;
struct osmo_fd trx_ofd_ctrl;
struct osmo_timer_list trx_ctrl_timer;
struct osmo_fd trx_ofd_data;
/* tranceiver config */
struct trx_config config;
uint8_t mf_index[8]; /* selected multiframe index */
/* Channel states for all channels on all timeslots */
struct trx_chan_state chan_states[8][_TRX_CHAN_MAX];
struct llist_head dl_prims[8]; /* Queue primitves for TX */
};
struct trx_l1h *l1if_open(struct gsm_bts_trx *trx);
void l1if_close(struct trx_l1h *l1h);
void l1if_reset(struct trx_l1h *l1h);
int l1if_provision_tranceiver_trx(struct trx_l1h *l1h);
int l1if_provision_tranceiver(struct gsm_bts *bts);
int l1if_mph_time_ind(struct gsm_bts *bts, uint32_t fn);
#endif /* L1_IF_H_TRX */

402
src/osmo-bts-trx/main.c Normal file
View File

@ -0,0 +1,402 @@
/* Main program for OsmoBTS-TRX */
/* (C) 2011 by Harald Welte <laforge@gnumonks.org>
* (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* 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 Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <sched.h>
#include <sys/signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/application.h>
#include <osmocom/vty/telnet_interface.h>
#include <osmocom/vty/logging.h>
#include <osmocom/core/gsmtap.h>
#include <osmocom/core/gsmtap_util.h>
#include <osmocom/core/bits.h>
#include <osmo-bts/gsm_data.h>
#include <osmo-bts/logging.h>
#include <osmo-bts/abis.h>
#include <osmo-bts/bts.h>
#include <osmo-bts/vty.h>
#include <osmo-bts/bts_model.h>
#include <osmo-bts/pcu_if.h>
#include <osmo-bts/l1sap.h>
#include "l1_if.h"
#include "trx_if.h"
#include "scheduler.h"
const int pcu_direct = 0;
int quit = 0;
static const char *config_file = "osmo-bts.cfg";
static int daemonize = 0;
static char *gsmtap_ip = 0;
static int high_prio = 0;
static int trx_num = 1;
char *software_version = "0.0";
uint8_t abis_mac[6] = { 0, 1, 2, 3, 4, 5 };
char *bsc_host = "localhost";
char *bts_id = "1801/0";
// FIXME this is a hack
static void get_mac(void)
{
struct if_nameindex *ifn = if_nameindex();
struct ifreq ifr;
int sock;
int ret;
sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0)
return;
memset(&ifr, 0, sizeof(ifr));
if (!ifn)
return;
while (ifn->if_name) {
strncpy(ifr.ifr_name, ifn->if_name, sizeof(ifr.ifr_name)-1);
ret = ioctl(sock, SIOCGIFHWADDR, &ifr);
if (ret == 0 && !!memcmp(ifr.ifr_hwaddr.sa_data,
"\0\0\0\0\0\0", 6)) {
memcpy(abis_mac, ifr.ifr_hwaddr.sa_data, 6);
printf("Using MAC address of %s: "
"'%02x:%02x:%02x:%02x:%02x:%02x'\n",
ifn->if_name,
abis_mac[0], abis_mac[1], abis_mac[2],
abis_mac[3], abis_mac[4], abis_mac[5]);
break;
}
ifn++;
}
// if_freenameindex(ifn);
}
int bts_model_init(struct gsm_bts *bts)
{
void *l1h;
struct gsm_bts_trx *trx;
llist_for_each_entry(trx, &bts->trx_list, list) {
l1h = l1if_open(trx);
if (!l1h) {
LOGP(DL1C, LOGL_FATAL, "Cannot open L1 Interface\n");
goto error;
}
trx->role_bts.l1h = l1h;
trx->nominal_power = 23;
l1if_reset(l1h);
}
bts_model_vty_init(bts);
return 0;
error:
llist_for_each_entry(trx, &bts->trx_list, list) {
l1h = trx->role_bts.l1h;
if (l1h)
l1if_close(l1h);
}
return -EIO;
}
/* dummy, since no direct dsp support */
uint32_t trx_get_hlayer1(struct gsm_bts_trx *trx)
{
return 0;
}
static void print_help()
{
printf( "Some useful options:\n"
" -h --help this text\n"
" -d --debug MASK Enable debugging (e.g. -d DRSL:DOML:DLAPDM)\n"
" -D --daemonize For the process into a background daemon\n"
" -c --config-file Specify the filename of the config file\n"
" -s --disable-color Don't use colors in stderr log output\n"
" -T --timestamp Prefix every log line with a timestamp\n"
" -V --version Print version information and exit\n"
" -e --log-level Set a global log-level\n"
" -t --trx-num Set number of TRX (default=%d)\n"
" -i --gsmtap-ip The destination IP used for GSMTAP.\n"
" -H --high-prio Set realtime scheduler with maximum prio\n"
" -I --tranceiver-ip Set IP of tranceiver (default=%s)\n"
,trx_num, tranceiver_ip);
}
/* FIXME: finally get some option parsing code into libosmocore */
static void handle_options(int argc, char **argv)
{
while (1) {
int option_idx = 0, c;
static const struct option long_options[] = {
/* FIXME: all those are generic Osmocom app options */
{ "help", 0, 0, 'h' },
{ "debug", 1, 0, 'd' },
{ "daemonize", 0, 0, 'D' },
{ "config-file", 1, 0, 'c' },
{ "disable-color", 0, 0, 's' },
{ "timestamp", 0, 0, 'T' },
{ "version", 0, 0, 'V' },
{ "log-level", 1, 0, 'e' },
{ "trx-num", 1, 0, 't' },
{ "gsmtap-ip", 1, 0, 'i' },
{ "high-prio", 0, 0, 'H' },
{ "tranceiver-ip", 1, 0, 'I' },
{ 0, 0, 0, 0 }
};
c = getopt_long(argc, argv, "hc:d:Dc:sTVe:t:i:HI:",
long_options, &option_idx);
if (c == -1)
break;
switch (c) {
case 'h':
print_help();
exit(0);
break;
case 's':
log_set_use_color(osmo_stderr_target, 0);
break;
case 'd':
log_parse_category_mask(osmo_stderr_target, optarg);
break;
case 'D':
daemonize = 1;
break;
case 'c':
config_file = strdup(optarg);
break;
case 'T':
log_set_print_timestamp(osmo_stderr_target, 1);
break;
case 'V':
print_version(1);
exit(0);
break;
case 'e':
log_set_log_level(osmo_stderr_target, atoi(optarg));
break;
case 't':
trx_num = atoi(optarg);
if (trx_num < 1)
trx_num = 1;
break;
case 'i':
gsmtap_ip = optarg;
break;
case 'H':
high_prio = 1;
break;
case 'I':
tranceiver_ip = strdup(optarg);
break;
default:
break;
}
}
}
static struct gsm_bts *bts;
static void signal_handler(int signal)
{
fprintf(stderr, "signal %u received\n", signal);
switch (signal) {
case SIGINT:
//osmo_signal_dispatch(SS_GLOBAL, S_GLOBAL_SHUTDOWN, NULL);
if (!quit)
bts_shutdown(bts, "SIGINT");
quit++;
break;
case SIGABRT:
case SIGUSR1:
case SIGUSR2:
talloc_report_full(tall_bts_ctx, stderr);
break;
default:
break;
}
}
static int write_pid_file(char *procname)
{
FILE *outf;
char tmp[PATH_MAX+1];
snprintf(tmp, sizeof(tmp)-1, "/var/run/%s.pid", procname);
tmp[PATH_MAX-1] = '\0';
outf = fopen(tmp, "w");
if (!outf)
return -1;
fprintf(outf, "%d\n", getpid());
fclose(outf);
return 0;
}
int main(int argc, char **argv)
{
struct gsm_bts_role_bts *btsb;
struct gsm_bts_trx *trx;
struct e1inp_line *line;
void *tall_msgb_ctx;
int rc, i;
printf("((*))\n |\n / \\ OsmoBTS\n");
get_mac();
tall_bts_ctx = talloc_named_const(NULL, 1, "OsmoBTS context");
tall_msgb_ctx = talloc_named_const(tall_bts_ctx, 1, "msgb");
msgb_set_talloc_ctx(tall_msgb_ctx);
bts_log_init(NULL);
handle_options(argc, argv);
bts = gsm_bts_alloc(tall_bts_ctx);
if (!bts) {
fprintf(stderr, "Failed to create BTS structure\n");
exit(1);
}
for (i = 1; i < trx_num; i++) {
trx = gsm_bts_trx_alloc(bts);
if (!trx) {
fprintf(stderr, "Failed to TRX structure\n");
exit(1);
}
}
vty_init(&bts_vty_info);
e1inp_vty_init();
bts_vty_init(bts, &bts_log_info);
if (bts_init(bts) < 0) {
fprintf(stderr, "unable to to open bts\n");
exit(1);
}
btsb = bts_role_bts(bts);
btsb->support.ciphers = 0; // CIPHER_A5(1) | CIPHER_A5(2) | CIPHER_A5(3);
if (gsmtap_ip) {
gsmtap = gsmtap_source_init(gsmtap_ip, GSMTAP_UDP_PORT, 1);
if (!gsmtap) {
fprintf(stderr, "Failed during gsmtap_init()\n");
exit(1);
}
gsmtap_source_add_sink(gsmtap);
}
rc = vty_read_config_file(config_file, NULL);
if (rc < 0) {
fprintf(stderr, "Failed to parse the config file: '%s'\n",
config_file);
exit(1);
}
write_pid_file("osmo-bts");
rc = telnet_init(tall_bts_ctx, NULL, 4241);
if (rc < 0) {
fprintf(stderr, "Error initializing telnet\n");
exit(1);
}
if (pcu_sock_init()) {
fprintf(stderr, "PCU L1 socket failed\n");
exit(-1);
}
signal(SIGINT, &signal_handler);
//signal(SIGABRT, &signal_handler);
signal(SIGUSR1, &signal_handler);
signal(SIGUSR2, &signal_handler);
osmo_init_ignore_signals();
if (!btsb->bsc_oml_host) {
fprintf(stderr, "Cannot start BTS without knowing BSC OML IP\n");
exit(1);
}
line = abis_open(bts, btsb->bsc_oml_host, "sysmoBTS");
if (!line) {
fprintf(stderr, "unable to connect to BSC\n");
exit(1);
}
if (daemonize) {
rc = osmo_daemonize();
if (rc < 0) {
perror("Error during daemonize");
exit(1);
}
}
if (high_prio) {
struct sched_param schedp;
/* high priority scheduling required for handling bursts */
rc = sched_get_priority_max(SCHED_RR);
memset(&schedp, 0, sizeof(schedp));
schedp.sched_priority = rc;
rc = sched_setscheduler(0, SCHED_RR, &schedp);
if (rc) {
fprintf(stderr, "Error setting scheduler\n");
}
}
while (quit < 2) {
log_reset_context();
osmo_select_main(0);
}
#if 0
telnet_exit();
talloc_report_full(tall_bts_ctx, stderr);
#endif
return 0;
}

473
src/osmo-bts-trx/pxxch.c Normal file
View File

@ -0,0 +1,473 @@
/*
* pxxch.c
*
* Copyright (c) 2013 Andreas Eversberg <jolly@eversberg.eu>
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <osmocom/core/bits.h>
#include <osmocom/core/conv.h>
#include <osmocom/core/crcgen.h>
#include "pxxch.h"
/*
* GSM PDTCH parity (FIRE code)
*
* g(x) = (x^23 + 1)(x^17 + x^3 + 1)
* = x^40 + x^26 + x^23 + x^17 + x^3 + 1
*/
const struct osmo_crc64gen_code pxxch_crc40 = {
.bits = 40,
.poly = 0x0004820009ULL,
.init = 0x0000000000ULL,
.remainder = 0xffffffffffULL,
};
/*
* GSM PDTCH CS-2, CS-3 parity
*
* g(x) = x^16 + x^12 + x^5 + 1
*/
const struct osmo_crc16gen_code pdtch_crc16 = {
.bits = 16,
.poly = 0x1021,
.init = 0x0000,
.remainder = 0xffff,
};
/*
* GSM PDTCH convolutional coding
*
* G_0 = 1 + x^3 + x^4
* G_1 = 1 + x + x^3 + x^4
*/
static const uint8_t conv_cs1_next_output[][2] = {
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
};
static const uint8_t conv_cs1_next_state[][2] = {
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
};
static const struct osmo_conv_code conv_cs1 = {
.N = 2,
.K = 5,
.len = 224,
.next_output = conv_cs1_next_output,
.next_state = conv_cs1_next_state,
};
static const uint8_t conv_cs2_next_output[][2] = {
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
};
static const uint8_t conv_cs2_next_state[][2] = {
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
};
static const struct osmo_conv_code conv_cs2 = {
.N = 2,
.K = 5,
.len = 290,
.next_output = conv_cs2_next_output,
.next_state = conv_cs2_next_state,
};
static const uint8_t conv_cs3_next_output[][2] = {
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
};
static const uint8_t conv_cs3_next_state[][2] = {
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
};
static const struct osmo_conv_code conv_cs3 = {
.N = 2,
.K = 5,
.len = 334,
.next_output = conv_cs3_next_output,
.next_state = conv_cs3_next_state,
};
/*
* GSM PxxCH interleaving and burst mapping
*
* Interleaving:
*
* Given 456 coded input bits, form 4 blocks of 114 bits:
*
* i(B, j) = c(n, k) k = 0, ..., 455
* n = 0, ..., N, N + 1, ...
* B = B_0 + 4n + (k mod 4)
* j = 2(49k mod 57) + ((k mod 8) div 4)
*
* Mapping on Burst:
*
* e(B, j) = i(B, j)
* e(B, 59 + j) = i(B, 57 + j) j = 0, ..., 56
* e(B, 57) = h_l(B)
* e(B, 58) = h_n(B)
*
* Where hl(B) and hn(B) are bits in burst B indicating flags.
*/
static void
pxxch_deinterleave(sbit_t *cB, sbit_t *iB)
{
int j, k, B;
for (k=0; k<456; k++) {
B = k & 3;
j = 2 * ((49 * k) % 57) + ((k & 7) >> 2);
cB[k] = iB[B * 114 + j];
}
}
static void
pxxch_interleave(ubit_t *cB, ubit_t *iB)
{
int j, k, B;
for (k=0; k<456; k++) {
B = k & 3;
j = 2 * ((49 * k) % 57) + ((k & 7) >> 2);
iB[B * 114 + j] = cB[k];
}
}
static void
pxxch_burst_unmap(sbit_t *iB, sbit_t *eB, sbit_t *hl, sbit_t *hn)
{
memcpy(iB, eB, 57);
memcpy(iB+57, eB+59, 57);
if (hl)
*hl = eB[57];
if (hn)
*hn = eB[58];
}
static void
pxxch_burst_map(ubit_t *iB, ubit_t *eB, ubit_t *hl, ubit_t *hn)
{
memcpy(eB, iB, 57);
memcpy(eB+59, iB+57, 57);
if (hl)
eB[57] = *hl;
if (hn)
eB[58] = *hn;
}
static ubit_t pdtch_hl_hn[4][8] = {
{ 1,1, 1,1, 1,1, 1,1 },
{ 1,1, 0,0, 1,0, 0,0 },
{ 0,0, 1,0, 0,0, 0,1 },
{ 0,0, 0,1, 0,1, 1,0 },
};
static ubit_t usf2six[8][6] = {
{ 0,0,0, 0,0,0 },
{ 0,0,1, 0,1,1 },
{ 0,1,0, 1,1,0 },
{ 0,1,1, 1,0,1 },
{ 1,0,0, 1,0,1 },
{ 1,0,1, 1,1,0 },
{ 1,1,0, 0,1,1 },
{ 1,1,1, 0,0,0 },
};
static ubit_t usf2twelve[8][12] = {
{ 0,0,0, 0,0,0, 0,0,0, 0,0,0 },
{ 0,0,0, 0,1,1, 0,1,1, 1,0,1 },
{ 0,0,1, 1,0,1, 1,1,0, 1,1,0 },
{ 0,0,1, 1,1,0, 1,0,1, 0,1,1 },
{ 1,1,0, 1,0,0, 0,0,1, 0,1,1 },
{ 1,1,0, 1,1,1, 0,1,0, 1,1,0 },
{ 1,1,1, 0,0,1, 1,1,1, 1,0,1 },
{ 1,1,1, 0,1,0, 1,0,0, 0,0,0 },
};
static uint8_t puncture_cs2[588] = {
0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,1, 0,0,0,0, 0,0,0,1, 0,0,0,1,
0,0,0,1, 0,0,0,1, 0,0,0,1
};
static uint8_t puncture_cs3[676] = {
0,0,0,0,0,0, 0,0,0,0,0,0, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,1,0,1,
0,0,0,1,0,1, 0,0,0,1,0,1, 0,0,0,0
};
int
pdch_decode(uint8_t *l2_data, sbit_t *bursts, uint8_t *usf_p)
{
sbit_t iB[456], cB[676], hl_hn[8];
ubit_t conv[456];
int i, j, k, rv, best, cs, usf;
for (i=0; i<4; i++)
pxxch_burst_unmap(&iB[i * 114], &bursts[i * 116], hl_hn + i*2,
hl_hn + i*2 + 1);
for (i=0, best=0, cs=1; i<4; j++) {
for (j=0, k=0; j<4; j++) {
if (pdtch_hl_hn[i][j] == hl_hn[j])
k++;
}
if (k > best)
cs = i+1;
}
pxxch_deinterleave(cB, iB);
switch (cs) {
case 1:
osmo_conv_decode(&conv_cs1, cB, conv);
rv = osmo_crc64gen_check_bits(&pxxch_crc40, conv, 184,
conv+184);
if (rv)
return -1;
osmo_ubit2pbit_ext(l2_data, 0, conv, 0, 184, 1);
return 23;
case 2:
for (i=587, j=455; i>=0; i++)
if (!puncture_cs2[i])
cB[i] = cB[j--];
else
cB[i] = 0;
osmo_conv_decode(&conv_cs2, cB, conv);
for (i=0, best=0, usf=0; i<8; j++) {
for (j=0, k=0; j<6; j++) {
if (usf2six[i][j] == conv[j])
k++;
}
if (k > best)
usf = i;
}
conv[3] = (usf >> 2) & 1;
conv[4] = (usf >> 1) & 1;
conv[5] = usf & 1;
if (usf_p)
*usf_p = usf;
rv = osmo_crc64gen_check_bits(&pxxch_crc40, conv+3, 271,
conv+3+271);
if (rv)
return -1;
osmo_ubit2pbit_ext(l2_data, 0, conv, 0, 271, 1);
return 34;
case 3:
for (i=675, j=455; i>=0; i++)
if (!puncture_cs3[i])
cB[i] = cB[j--];
else
cB[i] = 0;
osmo_conv_decode(&conv_cs3, cB, conv);
for (i=0, best=0, usf=0; i<8; j++) {
for (j=0, k=0; j<6; j++) {
if (usf2six[i][j] == conv[j])
k++;
}
if (k > best)
usf = i;
}
conv[3] = (usf >> 2) & 1;
conv[4] = (usf >> 1) & 1;
conv[5] = usf & 1;
if (usf_p)
*usf_p = usf;
rv = osmo_crc64gen_check_bits(&pxxch_crc40, conv+3, 315,
conv+3+315);
if (rv)
return -1;
osmo_ubit2pbit_ext(l2_data, 0, conv, 0, 315, 1);
return 40;
case 4:
for (i=0; i<456;i++)
conv[i] = (cB[i] < 0) ? 1:0;
for (i=0, best=0, usf=0; i<8; j++) {
for (j=0, k=0; j<12; j++) {
if (usf2twelve[i][j] == conv[j])
k++;
}
if (k > best)
usf = i;
}
conv[9] = (usf >> 2) & 1;
conv[10] = (usf >> 1) & 1;
conv[11] = usf & 1;
if (usf_p)
*usf_p = usf;
rv = osmo_crc64gen_check_bits(&pxxch_crc40, conv+9, 431,
conv+9+431);
if (rv)
return -1;
osmo_ubit2pbit_ext(l2_data, 0, conv, 0, 431, 1);
return 54;
}
return -1;
}
int
pdtch_encode(ubit_t *bursts, uint8_t *l2_data, uint8_t l2_len)
{
ubit_t iB[456], cB[676], *hl_hn;
ubit_t conv[334];
int i, j, usf;
switch (l2_len) {
case 23:
osmo_pbit2ubit_ext(conv, 0, l2_data, 0, 184, 1);
osmo_crc64gen_set_bits(&pxxch_crc40, conv, 184, conv+184);
osmo_conv_encode(&conv_cs1, conv, cB);
hl_hn = pdtch_hl_hn[0];
break;
case 34:
osmo_pbit2ubit_ext(conv, 3, l2_data, 0, 271, 1);
usf = (conv[3] << 2) | (conv[4] << 1) | conv[5];
osmo_crc16gen_set_bits(&pdtch_crc16, conv+3, 271, conv+3+271);
memcpy(conv, usf2six[usf], 6);
osmo_conv_encode(&conv_cs2, conv, cB);
for (i=0, j=0; i<588; i++)
if (!puncture_cs2[i])
cB[j++] = cB[i];
hl_hn = pdtch_hl_hn[1];
break;
case 40:
osmo_pbit2ubit_ext(conv, 3, l2_data, 0, 315, 1);
usf = (conv[3] << 2) | (conv[4] << 1) | conv[5];
osmo_crc16gen_set_bits(&pdtch_crc16, conv+3, 315, conv+3+315);
memcpy(conv, usf2six[usf], 6);
osmo_conv_encode(&conv_cs3, conv, cB);
for (i=0, j=0; i<676; i++)
if (!puncture_cs3[i])
cB[j++] = cB[i];
hl_hn = pdtch_hl_hn[2];
break;
case 54:
osmo_pbit2ubit_ext(cB, 9, l2_data, 0, 431, 1);
usf = (cB[9] << 2) | (cB[10] << 1) | conv[11];
osmo_crc16gen_set_bits(&pdtch_crc16, cB+9, 431, cB+9+431);
memcpy(cB, usf2twelve[usf], 12);
hl_hn = pdtch_hl_hn[3];
break;
default:
return -1;
}
pxxch_interleave(cB, iB);
for (i=0; i<4; i++)
pxxch_burst_map(&iB[i * 114], &bursts[i * 116], hl_hn + i*2,
hl_hn + i*2 + 1);
return 0;
}

7
src/osmo-bts-trx/pxxch.h Normal file
View File

@ -0,0 +1,7 @@
#ifndef _PXXCH_H
#define _PXXCH_H
int pdch_decode(uint8_t *l2_data, sbit_t *bursts, uint8_t *usf_p);
int pdtch_encode(ubit_t *bursts, uint8_t *l2_data, uint8_t l2_len);
#endif /* _PXXCH_H */

118
src/osmo-bts-trx/rach.c Normal file
View File

@ -0,0 +1,118 @@
/*
* conv_rach.c
*
* Convolutional code tables for RACH channels
*
* Copyright (C) 2011 Sylvain Munaut <tnt@246tNt.com>
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <osmocom/core/bits.h>
#include <osmocom/core/conv.h>
#include <osmocom/core/crcgen.h>
#include "rach.h"
/*
* GSM RACH parity
*
* g(x) = x^6 + x^5 + x^3 + x^2 + x^1 + 1
*/
static const struct osmo_crc8gen_code rach_crc6 = {
.bits = 6,
.poly = 0x2f,
.init = 0x00,
.remainder = 0x3f,
};
/*
* GSM RACH convolutional coding
*
* G_0 = 1 + x^3 + x^4
* G_1 = 1 + x + x^3 + x^4
*/
static const uint8_t conv_rach_next_output[][2] = {
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
};
static const uint8_t conv_rach_next_state[][2] = {
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
};
const struct osmo_conv_code conv_rach = {
.N = 2,
.K = 5,
.len = 14,
.next_output = conv_rach_next_output,
.next_state = conv_rach_next_state,
};
/*
* GSM RACH apply BSIC to parity
*
* p(j) = p(j) xor b(j) j = 0, ..., 5
* b(0) = MSB of PLMN colour code
* b(5) = LSB of BS colour code
*/
static int
rach_apply_bsic(ubit_t *d, uint8_t bsic)
{
int i;
/* Apply it */
for (i=0; i<6; i++)
d[8+i] ^= ((bsic >> (5-i)) & 1);
return 0;
}
int
rach_decode(uint8_t *ra, sbit_t *burst, uint8_t bsic)
{
ubit_t conv[14];
int rv;
osmo_conv_decode(&conv_rach, burst, conv);
rach_apply_bsic(conv, bsic);
rv = osmo_crc8gen_check_bits(&rach_crc6, conv, 8, conv+8);
if (rv)
return -1;
osmo_ubit2pbit_ext(ra, 0, conv, 0, 8, 1);
return 0;
}
int
rach_encode(ubit_t *burst, uint8_t *ra, uint8_t bsic)
{
ubit_t conv[14];
osmo_pbit2ubit_ext(conv, 0, ra, 0, 8, 1);
osmo_crc8gen_set_bits(&rach_crc6, conv, 8, conv+8);
rach_apply_bsic(conv, bsic);
osmo_conv_encode(&conv_rach, conv, burst);
return 0;
}

7
src/osmo-bts-trx/rach.h Normal file
View File

@ -0,0 +1,7 @@
#ifndef _RACH_H
#define _RACH_H
int rach_decode(uint8_t *ra, sbit_t *burst, uint8_t bsic);
int rach_encode(ubit_t *burst, uint8_t *ra, uint8_t bsic);
#endif /* _RACH_H */

89
src/osmo-bts-trx/sch.c Normal file
View File

@ -0,0 +1,89 @@
/*
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <osmocom/core/bits.h>
#include <osmocom/core/conv.h>
#include <osmocom/core/crcgen.h>
#include "sch.h"
/*
* GSM SCH parity
*
* g(x) = x^10 + x^8 + x^6 + x^5 + x^4 + x^2 + 1
*/
const struct osmo_crc16gen_code sch_crc10 = {
.bits = 10,
.poly = 0x175,
.init = 0x000,
.remainder = 0x3ff,
};
/*
* GSM SCH convolutional coding
*
* G_0 = 1 + x^3 + x^4
* G_1 = 1 + x + x^3 + x^4
*/
static const uint8_t conv_rach_next_output[][2] = {
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
};
static const uint8_t conv_rach_next_state[][2] = {
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
};
static const struct osmo_conv_code conv_sch = {
.N = 2,
.K = 5,
.len = 35,
.next_output = conv_rach_next_output,
.next_state = conv_rach_next_state,
};
int
sch_decode(uint8_t *sb_info, sbit_t *burst)
{
ubit_t conv[35];
int rv;
osmo_conv_decode(&conv_sch, burst, conv);
rv = osmo_crc16gen_check_bits(&sch_crc10, conv, 25, conv+25);
if (rv)
return -1;
osmo_ubit2pbit_ext(sb_info, 0, conv, 0, 25, 1);
return 0;
}
int
sch_encode(ubit_t *burst, uint8_t *sb_info)
{
ubit_t conv[35];
osmo_pbit2ubit_ext(conv, 0, sb_info, 0, 25, 1);
osmo_crc16gen_set_bits(&sch_crc10, conv, 25, conv+25);
osmo_conv_encode(&conv_sch, conv, burst);
return 0;
}

7
src/osmo-bts-trx/sch.h Normal file
View File

@ -0,0 +1,7 @@
#ifndef _SCH_H
#define _SCH_H
int sch_decode(uint8_t *sb_info, sbit_t *burst);
int sch_encode(ubit_t *burst, uint8_t *sb_info);
#endif /* _SCH_H */

1987
src/osmo-bts-trx/scheduler.c Normal file
View File

File diff suppressed because it is too large Load Diff

29
src/osmo-bts-trx/scheduler.h Normal file
View File

@ -0,0 +1,29 @@
#ifndef TRX_SCHEDULER_H
#define TRX_SCHEDULER_H
extern uint32_t trx_clock_advance;
extern uint32_t tranceiver_last_fn;
int trx_sched_init(struct trx_l1h *l1h);
void trx_sched_exit(struct trx_l1h *l1h);
int trx_sched_ph_data_req(struct trx_l1h *l1h, struct osmo_phsap_prim *l1sap);
int trx_sched_tch_req(struct trx_l1h *l1h, struct osmo_phsap_prim *l1sap);
int trx_sched_clock(uint32_t fn);
int trx_sched_ul_burst(struct trx_l1h *l1h, uint8_t tn, uint32_t fn,
sbit_t *bits, int8_t rssi, int16_t toa);
/* set multiframe scheduler to given pchan */
int trx_sched_set_pchan(struct trx_l1h *l1h, uint8_t tn,
enum gsm_phys_chan_config pchan);
/* setting all logical channels given attributes to active/inactive */
int trx_sched_set_lchan(struct trx_l1h *l1h, uint8_t chan_nr, uint8_t link_id,
int downlink, int active);
#endif /* TRX_SCHEDULER_H */

310
src/osmo-bts-trx/tch_fr.c Normal file
View File

@ -0,0 +1,310 @@
/*
* tch_fr.c
*
* Copyright (c) 2013 Andreas Eversberg <jolly@eversberg.eu>
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <osmocom/core/bits.h>
#include <osmocom/core/conv.h>
#include <osmocom/core/crcgen.h>
#include "xcch.h"
#include "tch_fr.h"
/*
* GSM TCH FR/EFR parity
*
* g(x) = x^3 + x + 1
*/
const struct osmo_crc8gen_code tch_fr_crc3 = {
.bits = 3,
.poly = 0x2,
.init = 0x0,
.remainder = 0x7,
};
/*
* GSM TCH FR/EFR convolutional coding
*
* G_0 = 1 + x^3 + x^4
* G_1 = 1 + x + x^3 + x^4
*/
static const uint8_t conv_tch_fr_next_output[][2] = {
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
};
static const uint8_t conv_tch_fr_next_state[][2] = {
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
};
static const struct osmo_conv_code conv_tch_fr = {
.N = 2,
.K = 5,
.len = 185,
.next_output = conv_tch_fr_next_output,
.next_state = conv_tch_fr_next_state,
};
/*
* GSM TCH FR/EFR interleaving and burst mapping
*
* Interleaving:
*
* Given 456 coded input bits, form 8 blocks of 114 bits,
* where event bits of the first 4 block and off bits of the last 4 block
* are used:
*
* i(B, j) = c(n, k) k = 0, ..., 455
* n = 0, ..., N, N + 1, ...
* B = B_0 + 4n + (k mod 8)
* j = 2(49k mod 57) + ((k mod 8) div 4)
*
* Mapping on Burst:
*
* e(B, j) = i(B, j)
* e(B, 59 + j) = i(B, 57 + j) j = 0, ..., 56
* e(B, 57) = h_l(B)
* e(B, 58) = h_n(B)
*
* Where hl(B) and hn(B) are bits in burst B indicating flags.
*/
static void
tch_fr_deinterleave(sbit_t *cB, sbit_t *iB)
{
int j, k, B;
for (k=0; k<456; k++) {
B = k & 7;
j = 2 * ((49 * k) % 57) + ((k & 7) >> 2);
cB[k] = iB[B * 114 + j];
}
}
static void
tch_fr_interleave(ubit_t *cB, ubit_t *iB)
{
int j, k, B;
for (k=0; k<456; k++) {
B = k & 7;
j = 2 * ((49 * k) % 57) + ((k & 7) >> 2);
iB[B * 114 + j] = cB[k];
}
}
static void
tch_fr_burst_unmap(sbit_t *iB, sbit_t *eB, sbit_t *h, int odd)
{
int i;
/* brainfuck: only copy even or odd bits */
for (i=odd; i<57; i+=2)
iB[i] = eB[i];
for (i=58-odd; i<114; i+=2)
iB[i] = eB[i+2];
if (h && !odd)
*h = eB[57];
if (h && odd)
*h = eB[58];
}
static void
tch_fr_burst_map(ubit_t *iB, ubit_t *eB, ubit_t *h, int odd)
{
int i;
/* brainfuck: only copy even or odd bits */
for (i=odd; i<57; i+=2)
eB[i] = iB[i];
for (i=58-odd; i<114; i+=2)
eB[i+2] = iB[i];
if (h && !odd)
eB[57] = *h;
if (h && odd)
eB[58] = *h;
}
/* this corresponds to the bit-lengths of the individual codec
* parameters as indicated in Table 1.1 of TS 06.10 */
static const uint8_t gsm_fr_map[] = {
6, 6, 5, 5, 4, 4, 3, 3,
7, 2, 2, 6, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3,
3, 7, 2, 2, 6, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 7, 2, 2, 6, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 7, 2, 2, 6, 3,
3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3
};
static void
tch_fr_reassemble(uint8_t *tch_data, ubit_t *d_bits)
{
int i, j, k, l, o;
tch_data[0] = 0xd << 4;
/* reassemble d-bits */
i = 0; /* counts bits */
j = 4; /* counts output bits */
k = gsm_fr_map[0]-1; /* current number bit in element */
l = 0; /* counts element bits */
o = 0; /* offset input bits */
while (i < 260) {
tch_data[j>>3] |= (d_bits[k+o] << (7-(j&7)));
if (--k < 0) {
o += gsm_fr_map[l];
k = gsm_fr_map[++l]-1;
}
i++;
j++;
}
}
static void
tch_fr_disassemble(ubit_t *d_bits, uint8_t *tch_data)
{
int i, j, k, l, o;
i = 0; /* counts bits */
j = 4; /* counts input bits */
k = gsm_fr_map[0]-1; /* current number bit in element */
l = 0; /* counts element bits */
o = 0; /* offset output bits */
while (i < 260) {
d_bits[k+o] = (tch_data[j>>3] >> (7-(j&7))) & 1;
if (--k < 0) {
o += gsm_fr_map[l];
k = gsm_fr_map[++l]-1;
}
i++;
j++;
}
}
static void
tch_fr_unreorder(ubit_t *d, ubit_t *p, ubit_t *u)
{
int i;
for (i=0; i<91; i++) {
d[i<<1] = u[i];
d[(i<<1)+1] = u[184-i];
}
for (i=0; i<3; i++)
p[i] = u[91+i];
}
static void
tch_fr_reorder(ubit_t *u, ubit_t *d, ubit_t *p)
{
int i;
for (i=0; i<91; i++) {
u[i] = d[i<<1];
u[184-i] = d[(i<<1)+1];
}
for (i=0; i<3; i++)
u[91+i] = p[i];
}
int
tch_fr_decode(uint8_t *tch_data, sbit_t *bursts)
{
sbit_t iB[912], cB[456], h;
ubit_t conv[185], d[260], p[3];
int i, rv, len, steal = 0;
for (i=0; i<8; i++) {
tch_fr_burst_unmap(&iB[i * 114], &bursts[i * 116], &h, i>>2);
if (h < 0)
steal++;
}
tch_fr_deinterleave(cB, iB);
if (steal < 4) {
osmo_conv_decode(&conv_tch_fr, cB, conv);
tch_fr_unreorder(d, p, conv);
for (i=0; i<78; i++)
d[i+182] = (cB[i+378] < 0) ? 1:0;
rv = osmo_crc8gen_check_bits(&tch_fr_crc3, d, 50, p);
if (rv)
return -1;
tch_fr_reassemble(tch_data, d);
len = 33;
} else {
rv = xcch_decode_cB(tch_data, cB);
if (rv)
return -1;
len = 23;
}
return len;
}
int
tch_fr_encode(ubit_t *bursts, uint8_t *tch_data, int len)
{
ubit_t iB[912], cB[456], h;
ubit_t conv[185], d[260], p[3];
int i;
switch (len) {
case 33: /* TCH FR */
tch_fr_disassemble(d, tch_data);
osmo_crc8gen_set_bits(&tch_fr_crc3, d, 50, p);
tch_fr_reorder(conv, d, p);
memcpy(cB+378, d+182, 78);
osmo_conv_encode(&conv_tch_fr, conv, cB);
h = 0;
break;
case 23: /* FACCH */
xcch_encode_cB(cB, tch_data);
h = 1;
break;
default:
return -1;
}
tch_fr_interleave(cB, iB);
for (i=0; i<8; i++)
tch_fr_burst_map(&iB[i * 114], &bursts[i * 116], &h, i>>2);
return 0;
}

7
src/osmo-bts-trx/tch_fr.h Normal file
View File

@ -0,0 +1,7 @@
#ifndef _TCH_FR_H
#define _TCH_FR_H
int tch_fr_decode(uint8_t *tch_data, sbit_t *bursts);
int tch_fr_encode(ubit_t *bursts, uint8_t *tch_data, int len);
#endif /* _TCH_FR_H */

495
src/osmo-bts-trx/trx_if.c Normal file
View File

@ -0,0 +1,495 @@
/*
* OpenBTS TRX interface handling
*
* Copyright (C) 2013 Andreas Eversberg <jolly@eversberg.eu>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netinet/in.h>
#include <osmocom/core/select.h>
#include <osmocom/core/socket.h>
#include <osmocom/core/timer.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/bits.h>
#include <osmo-bts/logging.h>
#include <osmo-bts/bts.h>
#include "l1_if.h"
#include "trx_if.h"
#include "scheduler.h"
int tranceiver_available = 0;
const char *tranceiver_ip = "127.0.0.1";
/*
* socket
*/
static uint16_t base_port_local = 5800;
/* open socket */
static int trx_udp_open(void *priv, struct osmo_fd *ofd, uint16_t port,
int (*cb)(struct osmo_fd *fd, unsigned int what))
{
struct sockaddr_storage sas;
struct sockaddr *sa = (struct sockaddr *)&sas;
socklen_t sa_len;
int rc;
/* Init */
ofd->fd = -1;
ofd->cb = cb;
ofd->data = priv;
/* Listen / Binds */
rc = osmo_sock_init_ofd(ofd, AF_UNSPEC, SOCK_DGRAM, 0, tranceiver_ip,
port, OSMO_SOCK_F_BIND);
if (rc < 0)
return rc;
/* Connect */
sa_len = sizeof(sas);
rc = getsockname(ofd->fd, sa, &sa_len);
if (rc)
return rc;
if (sa->sa_family == AF_INET) {
struct sockaddr_in *sin = (struct sockaddr_in *)sa;
sin->sin_port = htons(ntohs(sin->sin_port) - 100);
} else if (sa->sa_family == AF_INET6) {
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)sa;
sin6->sin6_port = htons(ntohs(sin6->sin6_port) - 100);
} else {
return -EINVAL;
}
rc = connect(ofd->fd, sa, sa_len);
if (rc)
return rc;
return 0;
}
/* close socket */
static void trx_udp_close(struct osmo_fd *ofd)
{
if (ofd->fd > 0) {
osmo_fd_unregister(ofd);
close(ofd->fd);
ofd->fd = -1;
}
}
/*
* clock
*/
static struct osmo_fd trx_ofd_clk;
/* get clock from clock socket */
static int trx_clk_read_cb(struct osmo_fd *ofd, unsigned int what)
{
char buf[1500];
int len;
len = recv(ofd->fd, buf, sizeof(buf) - 1, 0);
if (len <= 0)
return len;
buf[len] = '\0';
if (!strncmp(buf, "IND CLOCK ", 10)) {
uint32_t fn;
sscanf(buf, "IND CLOCK %u", &fn);
LOGP(DTRX, LOGL_INFO, "Clock indication: fn=%u\n", fn);
trx_sched_clock(fn);
} else
LOGP(DTRX, LOGL_NOTICE, "Unknown message on clock port: %s\n",
buf);
return 0;
}
/*
* ctrl
*/
static void trx_ctrl_timer_cb(void *data);
/* send first ctrl message and start timer */
static void trx_ctrl_send(struct trx_l1h *l1h)
{
struct trx_ctrl_msg *tcm;
/* get first command */
if (llist_empty(&l1h->trx_ctrl_list))
return;
tcm = llist_entry(l1h->trx_ctrl_list.next, struct trx_ctrl_msg, list);
LOGP(DTRX, LOGL_DEBUG, "Sending control '%s' to trx=%u\n", tcm->cmd,
l1h->trx->nr);
/* send command */
send(l1h->trx_ofd_ctrl.fd, tcm->cmd, strlen(tcm->cmd)+1, 0);
/* start timer */
l1h->trx_ctrl_timer.cb = trx_ctrl_timer_cb;
l1h->trx_ctrl_timer.data = l1h;
osmo_timer_schedule(&l1h->trx_ctrl_timer, 2, 0);
}
/* send first ctrl message and start timer */
static void trx_ctrl_timer_cb(void *data)
{
struct trx_l1h *l1h = data;
LOGP(DTRX, LOGL_NOTICE, "No response from tranceiver\n");
trx_ctrl_send(l1h);
}
/* add a new ctrl command */
static int trx_ctrl_cmd(struct trx_l1h *l1h, const char *cmd, const char *fmt,
...)
{
struct trx_ctrl_msg *tcm;
va_list ap;
int l;
/* create message */
tcm = talloc_zero(tall_bts_ctx, struct trx_ctrl_msg);
if (!tcm)
return -ENOMEM;
if (fmt && fmt[0]) {
l = snprintf(tcm->cmd, sizeof(tcm->cmd)-1, "CMD %s ", cmd);
va_start(ap, fmt);
vsnprintf(tcm->cmd + l, sizeof(tcm->cmd) - l - 1, fmt, ap);
va_end(ap);
} else
snprintf(tcm->cmd, sizeof(tcm->cmd)-1, "CMD %s", cmd);
tcm->cmd_len = strlen(cmd);
llist_add_tail(&tcm->list, &l1h->trx_ctrl_list);
LOGP(DTRX, LOGL_INFO, "Adding new control '%s'\n", tcm->cmd);
/* send message, if no pending message */
if (!osmo_timer_pending(&l1h->trx_ctrl_timer))
trx_ctrl_send(l1h);
return 0;
}
int trx_if_cmd_poweroff(struct trx_l1h *l1h)
{
return trx_ctrl_cmd(l1h, "POWEROFF", "");
}
int trx_if_cmd_poweron(struct trx_l1h *l1h)
{
return trx_ctrl_cmd(l1h, "POWERON", "");
}
int trx_if_cmd_settsc(struct trx_l1h *l1h, uint8_t tsc)
{
return trx_ctrl_cmd(l1h, "SETTSC", "%d", tsc);
}
int trx_if_cmd_setbsic(struct trx_l1h *l1h, uint8_t bsic)
{
return trx_ctrl_cmd(l1h, "SETBSIC", "%d", bsic);
}
int trx_if_cmd_setrxgain(struct trx_l1h *l1h, int db)
{
return trx_ctrl_cmd(l1h, "SETRXGAIN", "%d", db);
}
int trx_if_cmd_setpower(struct trx_l1h *l1h, int db)
{
return trx_ctrl_cmd(l1h, "SETPOWER", "%d", db);
}
int trx_if_cmd_setmaxdly(struct trx_l1h *l1h, int dly)
{
return trx_ctrl_cmd(l1h, "SETMAXDLY", "%d", dly);
}
int trx_if_cmd_setslot(struct trx_l1h *l1h, uint8_t tn, uint8_t type)
{
return trx_ctrl_cmd(l1h, "SETSLOT", "%d %d", tn, type);
}
int trx_if_cmd_rxtune(struct trx_l1h *l1h, uint16_t arfcn)
{
uint16_t freq10;
freq10 = gsm_arfcn2freq10(arfcn, 1); /* RX = uplink */
if (freq10 == 0xffff) {
LOGP(DTRX, LOGL_ERROR, "Arfcn %d not defined.\n", arfcn);
return -ENOTSUP;
}
return trx_ctrl_cmd(l1h, "RXTUNE", "%d", freq10 * 100);
}
int trx_if_cmd_txtune(struct trx_l1h *l1h, uint16_t arfcn)
{
uint16_t freq10;
freq10 = gsm_arfcn2freq10(arfcn, 0); /* TX = downlink */
if (freq10 == 0xffff) {
LOGP(DTRX, LOGL_ERROR, "Arfcn %d not defined.\n", arfcn);
return -ENOTSUP;
}
return trx_ctrl_cmd(l1h, "TXTUNE", "%d", freq10 * 100);
}
/* get response from ctrl socket */
static int trx_ctrl_read_cb(struct osmo_fd *ofd, unsigned int what)
{
struct trx_l1h *l1h = ofd->data;
char buf[1500];
int len, resp;
len = recv(ofd->fd, buf, sizeof(buf) - 1, 0);
if (len <= 0)
return len;
buf[len] = '\0';
if (!strncmp(buf, "RSP ", 4)) {
struct trx_ctrl_msg *tcm;
char *p;
int rsp_len = 0;
/* calculate the length of response item */
p = strchr(buf + 4, ' ');
if (p)
rsp_len = p - buf - 4;
else
rsp_len = strlen(buf) - 4;
LOGP(DTRX, LOGL_DEBUG, "Response message: '%s'\n", buf);
/* get command for response message */
if (llist_empty(&l1h->trx_ctrl_list)) {
LOGP(DTRX, LOGL_NOTICE, "Response message without "
"command\n");
return -EINVAL;
}
tcm = llist_entry(l1h->trx_ctrl_list.next, struct trx_ctrl_msg,
list);
/* check if respose matches command */
if (rsp_len != tcm->cmd_len) {
notmatch:
LOGP(DTRX, LOGL_NOTICE, "Response message '%s' does "
"not match command message '%s'\n", buf,
tcm->cmd);
return -EINVAL;
}
if (!!strncmp(buf + 4, tcm->cmd + 4, rsp_len))
goto notmatch;
/* check for response code */
if (*p) {
sscanf(p + 1, "%d", &resp);
if (resp) {
LOGP(DTRX, LOGL_ERROR, "Tranceiver rejected "
"TRX command with response: '%s'\n",
buf);
}
}
/* remove command from list */
llist_del(&tcm->list);
talloc_free(tcm);
/* abort timer and send next message, if any */
if (osmo_timer_pending(&l1h->trx_ctrl_timer))
osmo_timer_del(&l1h->trx_ctrl_timer);
trx_ctrl_send(l1h);
} else
LOGP(DTRX, LOGL_NOTICE, "Unknown message on ctrl port: %s\n",
buf);
return 0;
}
/*
* data
*/
static int trx_data_read_cb(struct osmo_fd *ofd, unsigned int what)
{
struct trx_l1h *l1h = ofd->data;
uint8_t buf[256];
int len;
uint8_t tn;
int8_t rssi;
int16_t toa;
uint32_t fn;
sbit_t bits[148];
int i;
len = recv(ofd->fd, buf, sizeof(buf), 0);
if (len <= 0)
return len;
if (len != 158) {
LOGP(DTRX, LOGL_NOTICE, "Got data message with invalid lenght "
"'%d'\n", len);
return -EINVAL;
}
tn = buf[0];
fn = (buf[1] << 24) | (buf[2] << 16) | (buf[3] << 8) | buf[4];
rssi = (int8_t)buf[5];
toa = (int16_t)(buf[6] << 8) | buf[7];
/* copy and convert bits {254..0} to sbits {-127..127} */
for (i = 0; i < 148; i++) {
if (buf[8 + i] == 255)
bits[i] = -127;
else
bits[i] = 127 - buf[8 + i];
}
if (tn >= 8) {
LOGP(DTRX, LOGL_ERROR, "Illegal TS %d\n", tn);
return -EINVAL;
}
if (fn >= 2715648) {
LOGP(DTRX, LOGL_ERROR, "Illegal FN %u\n", fn);
return -EINVAL;
}
LOGP(DTRX, LOGL_DEBUG, "RX burst tn=%u fn=%u rssi=%d toa=%d ",
tn, fn, rssi, toa);
trx_sched_ul_burst(l1h, tn, fn, bits, rssi, toa);
return 0;
}
int trx_if_data(struct trx_l1h *l1h, uint8_t tn, uint32_t fn, uint8_t pwr,
const ubit_t *bits)
{
uint8_t buf[256];
LOGP(DTRX, LOGL_DEBUG, "TX burst tn=%u fn=%u pwr=%u\n", tn, fn, pwr);
buf[0] = tn;
buf[1] = (fn >> 24) & 0xff;
buf[2] = (fn >> 16) & 0xff;
buf[3] = (fn >> 8) & 0xff;
buf[4] = (fn >> 0) & 0xff;
buf[5] = pwr;
/* copy ubits {0,1} */
memcpy(buf + 6, bits, 148);
/* we must be sure that we have clock, and we have sent all control
* data */
if (tranceiver_available && llist_empty(&l1h->trx_ctrl_list)) {
send(l1h->trx_ofd_data.fd, buf, 154, 0);
} else
LOGP(DTRX, LOGL_DEBUG, "Ignoring TX data, tranceiver "
"offline.\n");
return 0;
}
/*
* open/close
*/
int trx_if_open(struct trx_l1h *l1h)
{
int rc;
LOGP(DTRX, LOGL_NOTICE, "Open tranceiver for trx=%u\n", l1h->trx->nr);
/* open sockets */
if (l1h->trx->nr == 0) {
rc = trx_udp_open(NULL, &trx_ofd_clk, base_port_local,
trx_clk_read_cb);
if (rc < 0)
return rc;
LOGP(DTRX, LOGL_NOTICE, "Waiting for tranceiver send clock\n");
}
rc = trx_udp_open(l1h, &l1h->trx_ofd_ctrl,
base_port_local + (l1h->trx->nr << 1) + 1, trx_ctrl_read_cb);
if (rc < 0)
goto err;
rc = trx_udp_open(l1h, &l1h->trx_ofd_data,
base_port_local + (l1h->trx->nr << 1) + 2, trx_data_read_cb);
if (rc < 0)
goto err;
/* initialize ctrl queue */
INIT_LLIST_HEAD(&l1h->trx_ctrl_list);
/* enable all slots */
l1h->config.slotmask = 0xff;
return 0;
err:
trx_if_close(l1h);
return rc;
}
/* flush pending control messages */
void trx_if_flush(struct trx_l1h *l1h)
{
struct trx_ctrl_msg *tcm;
/* free ctrl message list */
while (!llist_empty(&l1h->trx_ctrl_list)) {
tcm = llist_entry(l1h->trx_ctrl_list.next, struct trx_ctrl_msg,
list);
llist_del(&tcm->list);
talloc_free(tcm);
}
}
void trx_if_close(struct trx_l1h *l1h)
{
LOGP(DTRX, LOGL_NOTICE, "Close tranceiver for trx=%u\n", l1h->trx->nr);
trx_if_flush(l1h);
/* close sockets */
if (l1h->trx->nr == 0)
trx_udp_close(&trx_ofd_clk);
trx_udp_close(&l1h->trx_ofd_ctrl);
trx_udp_close(&l1h->trx_ofd_data);
}

29
src/osmo-bts-trx/trx_if.h Normal file
View File

@ -0,0 +1,29 @@
#ifndef TRX_IF_H
#define TRX_IF_H
extern int tranceiver_available;
extern const char *tranceiver_ip;
struct trx_ctrl_msg {
struct llist_head list;
char cmd[128];
int cmd_len;
};
int trx_if_cmd_poweroff(struct trx_l1h *l1h);
int trx_if_cmd_poweron(struct trx_l1h *l1h);
int trx_if_cmd_settsc(struct trx_l1h *l1h, uint8_t tsc);
int trx_if_cmd_setbsic(struct trx_l1h *l1h, uint8_t bsic);
int trx_if_cmd_setrxgain(struct trx_l1h *l1h, int db);
int trx_if_cmd_setpower(struct trx_l1h *l1h, int db);
int trx_if_cmd_setmaxdly(struct trx_l1h *l1h, int dly);
int trx_if_cmd_setslot(struct trx_l1h *l1h, uint8_t tn, uint8_t type);
int trx_if_cmd_rxtune(struct trx_l1h *l1h, uint16_t arfcn);
int trx_if_cmd_txtune(struct trx_l1h *l1h, uint16_t arfcn);
int trx_if_data(struct trx_l1h *l1h, uint8_t tn, uint32_t fn, uint8_t pwr,
const ubit_t *bits);
int trx_if_open(struct trx_l1h *l1h);
void trx_if_flush(struct trx_l1h *l1h);
void trx_if_close(struct trx_l1h *l1h);
#endif /* TRX_IF_H */

281
src/osmo-bts-trx/trx_vty.c Normal file
View File

@ -0,0 +1,281 @@
/* VTY interface for sysmoBTS */
/* (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <stdint.h>
#include <ctype.h>
#include <arpa/inet.h>
#include <osmocom/core/msgb.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/select.h>
#include <osmocom/core/bits.h>
#include <osmocom/vty/vty.h>
#include <osmocom/vty/command.h>
#include <osmocom/vty/misc.h>
#include <osmo-bts/gsm_data.h>
#include <osmo-bts/logging.h>
#include <osmo-bts/vty.h>
#include "l1_if.h"
#include "scheduler.h"
#include "trx_if.h"
static struct gsm_bts *vty_bts;
DEFUN(show_tranceiver, show_tranceiver_cmd, "show tranceiver",
SHOW_STR "Display information about tranceivers\n")
{
struct gsm_bts *bts = vty_bts;
struct gsm_bts_trx *trx;
struct trx_l1h *l1h;
uint8_t tn;
if (!tranceiver_available) {
vty_out(vty, "Tranceiver is not connected%s", VTY_NEWLINE);
} else {
vty_out(vty, "Tranceiver is connected, current fn=%u%s",
tranceiver_last_fn, VTY_NEWLINE);
}
llist_for_each_entry(trx, &bts->trx_list, list) {
l1h = trx_l1h_hdl(trx);
vty_out(vty, "TRX %d%s", trx->nr, VTY_NEWLINE);
vty_out(vty, " %s%s",
(l1h->config.poweron) ? "poweron":"poweroff",
VTY_NEWLINE);
if (l1h->config.arfcn_valid)
vty_out(vty, " arfcn : %d%s%s",
(l1h->config.arfcn & ~ARFCN_PCS),
(l1h->config.arfcn & ARFCN_PCS) ? " (PCS)" : "",
VTY_NEWLINE);
else
vty_out(vty, " arfcn : undefined%s", VTY_NEWLINE);
if (l1h->config.tsc_valid)
vty_out(vty, " tsc : %d%s", l1h->config.tsc,
VTY_NEWLINE);
else
vty_out(vty, " tsc : undefined%s", VTY_NEWLINE);
if (l1h->config.bsic_valid)
vty_out(vty, " bsic : %d%s", l1h->config.bsic,
VTY_NEWLINE);
else
vty_out(vty, " bisc : undefined%s", VTY_NEWLINE);
if (l1h->config.rxgain_valid)
vty_out(vty, " rxgain : %d%s", l1h->config.rxgain,
VTY_NEWLINE);
else
vty_out(vty, " rxgain : undefined%s", VTY_NEWLINE);
if (l1h->config.power_valid)
vty_out(vty, " power : %d%s", l1h->config.power,
VTY_NEWLINE);
else
vty_out(vty, " power : undefined%s", VTY_NEWLINE);
if (l1h->config.maxdly_valid)
vty_out(vty, " maxdly : %d%s", l1h->config.maxdly,
VTY_NEWLINE);
else
vty_out(vty, " maxdly : undefined%s", VTY_NEWLINE);
for (tn = 0; tn < 8; tn++) {
if (!((1 << tn) & l1h->config.slotmask))
vty_out(vty, " slot #%d: unsupported%s", tn,
VTY_NEWLINE);
else if (l1h->config.slottype_valid[tn])
vty_out(vty, " slot #%d: type %d%s", tn,
l1h->config.slottype[tn],
VTY_NEWLINE);
else
vty_out(vty, " slot #%d: undefined%s", tn,
VTY_NEWLINE);
}
}
return CMD_SUCCESS;
}
DEFUN(cfg_bts_fn_advance, cfg_bts_fn_advance_cmd,
"fn-advance <0-30>",
"Set the number of frames to be transmitted in advance of current FN\n"
"Advance in frames\n")
{
trx_clock_advance = atoi(argv[0]);
return CMD_SUCCESS;
}
DEFUN(cfg_trx_rxgain, cfg_trx_rxgain_cmd,
"rxgain <0-50>",
"Set the receiver gain in dB\n"
"Gain in dB\n")
{
struct gsm_bts_trx *trx = vty->index;
struct trx_l1h *l1h = trx_l1h_hdl(trx);
l1h->config.rxgain = atoi(argv[0]);
l1h->config.rxgain_valid = 1;
l1h->config.rxgain_sent = 0;
l1if_provision_tranceiver_trx(l1h);
return CMD_SUCCESS;
}
DEFUN(cfg_trx_power, cfg_trx_power_cmd,
"power <0-50>",
"Set the transmitter power dampening\n"
"Power dampening in dB\n")
{
struct gsm_bts_trx *trx = vty->index;
struct trx_l1h *l1h = trx_l1h_hdl(trx);
l1h->config.power = atoi(argv[0]);
l1h->config.power_valid = 1;
l1h->config.power_sent = 0;
l1if_provision_tranceiver_trx(l1h);
return CMD_SUCCESS;
}
DEFUN(cfg_trx_maxdly, cfg_trx_maxdly_cmd,
"maxdly <0-31>",
"Set the maximum delay of GSM symbols\n"
"GSM symbols (approx. 1.1km per symbol)\n")
{
struct gsm_bts_trx *trx = vty->index;
struct trx_l1h *l1h = trx_l1h_hdl(trx);
l1h->config.maxdly = atoi(argv[0]);
l1h->config.maxdly_valid = 1;
l1h->config.maxdly_sent = 0;
l1if_provision_tranceiver_trx(l1h);
return CMD_SUCCESS;
}
DEFUN(cfg_trx_slotmask, cfg_trx_slotmask_cmd,
"slotmask (1|0) (1|0) (1|0) (1|0) (1|0) (1|0) (1|0) (1|0)",
"Set the supported slots\n"
"TS0 supported\nTS0 unsupported\nTS1 supported\nTS1 unsupported\n"
"TS2 supported\nTS2 unsupported\nTS3 supported\nTS3 unsupported\n"
"TS4 supported\nTS4 unsupported\nTS5 supported\nTS5 unsupported\n"
"TS6 supported\nTS6 unsupported\nTS7 supported\nTS7 unsupported\n")
{
struct gsm_bts_trx *trx = vty->index;
struct trx_l1h *l1h = trx_l1h_hdl(trx);
uint8_t tn;
l1h->config.slotmask = 0;
for (tn = 0; tn < 8; tn++)
if (argv[tn][0] == '1')
l1h->config.slotmask |= (1 << tn);
return CMD_SUCCESS;
}
DEFUN(cfg_trx_no_rxgain, cfg_trx_no_rxgain_cmd,
"no rxgain <0-50>",
NO_STR "Unset the receiver gain in dB\n"
"Gain in dB\n")
{
struct gsm_bts_trx *trx = vty->index;
struct trx_l1h *l1h = trx_l1h_hdl(trx);
l1h->config.rxgain_valid = 0;
return CMD_SUCCESS;
}
DEFUN(cfg_trx_no_power, cfg_trx_no_power_cmd,
"no power <0-50>",
NO_STR "Unset the transmitter power dampening\n"
"Power dampening in dB\n")
{
struct gsm_bts_trx *trx = vty->index;
struct trx_l1h *l1h = trx_l1h_hdl(trx);
l1h->config.power_valid = 0;
return CMD_SUCCESS;
}
DEFUN(cfg_trx_no_maxdly, cfg_trx_no_maxdly_cmd,
"no maxdly <0-31>",
NO_STR "Unset the maximum delay of GSM symbols\n"
"GSM symbols (approx. 1.1km per symbol)\n")
{
struct gsm_bts_trx *trx = vty->index;
struct trx_l1h *l1h = trx_l1h_hdl(trx);
l1h->config.maxdly_valid = 0;
return CMD_SUCCESS;
}
void bts_model_config_write_bts(struct vty *vty, struct gsm_bts *bts)
{
vty_out(vty, " fn-advance %d%s", trx_clock_advance, VTY_NEWLINE);
}
void bts_model_config_write_trx(struct vty *vty, struct gsm_bts_trx *trx)
{
struct trx_l1h *l1h = trx_l1h_hdl(trx);
if (l1h->config.rxgain_valid)
vty_out(vty, " rxgain %d%s", l1h->config.rxgain, VTY_NEWLINE);
if (l1h->config.power_valid)
vty_out(vty, " power %d%s", l1h->config.power, VTY_NEWLINE);
if (l1h->config.maxdly_valid)
vty_out(vty, " maxdly %d%s", l1h->config.maxdly, VTY_NEWLINE);
if (l1h->config.slotmask != 0xff)
vty_out(vty, " slotmask %d %d %d %d %d %d %d %d%s",
l1h->config.slotmask & 1,
(l1h->config.slotmask >> 1) & 1,
(l1h->config.slotmask >> 2) & 1,
(l1h->config.slotmask >> 3) & 1,
(l1h->config.slotmask >> 4) & 1,
(l1h->config.slotmask >> 5) & 1,
(l1h->config.slotmask >> 6) & 1,
l1h->config.slotmask >> 7,
VTY_NEWLINE);
}
int bts_model_vty_init(struct gsm_bts *bts)
{
vty_bts = bts;
install_element_ve(&show_tranceiver_cmd);
install_element(BTS_NODE, &cfg_bts_fn_advance_cmd);
install_element(TRX_NODE, &cfg_trx_rxgain_cmd);
install_element(TRX_NODE, &cfg_trx_power_cmd);
install_element(TRX_NODE, &cfg_trx_maxdly_cmd);
install_element(TRX_NODE, &cfg_trx_slotmask_cmd);
install_element(TRX_NODE, &cfg_trx_no_rxgain_cmd);
install_element(TRX_NODE, &cfg_trx_no_power_cmd);
install_element(TRX_NODE, &cfg_trx_no_maxdly_cmd);
return 0;
}

193
src/osmo-bts-trx/xcch.c Normal file
View File

@ -0,0 +1,193 @@
/*
* xcch.c
*
* Copyright (c) 2011 Sylvain Munaut <tnt@246tNt.com>
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <osmocom/core/bits.h>
#include <osmocom/core/conv.h>
#include <osmocom/core/crcgen.h>
#include "xcch.h"
/*
* GSM xCCH parity (FIRE code)
*
* g(x) = (x^23 + 1)(x^17 + x^3 + 1)
* = x^40 + x^26 + x^23 + x^17 + x^3 + 1
*/
const struct osmo_crc64gen_code xcch_crc40 = {
.bits = 40,
.poly = 0x0004820009ULL,
.init = 0x0000000000ULL,
.remainder = 0xffffffffffULL,
};
/*
* GSM xCCH convolutional coding
*
* G_0 = 1 + x^3 + x^4
* G_1 = 1 + x + x^3 + x^4
*/
static const uint8_t conv_xcch_next_output[][2] = {
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 3, 0 }, { 2, 1 }, { 3, 0 }, { 2, 1 },
{ 0, 3 }, { 1, 2 }, { 0, 3 }, { 1, 2 },
};
static const uint8_t conv_xcch_next_state[][2] = {
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
{ 0, 1 }, { 2, 3 }, { 4, 5 }, { 6, 7 },
{ 8, 9 }, { 10, 11 }, { 12, 13 }, { 14, 15 },
};
static const struct osmo_conv_code conv_xcch = {
.N = 2,
.K = 5,
.len = 224,
.next_output = conv_xcch_next_output,
.next_state = conv_xcch_next_state,
};
/*
* GSM xCCH interleaving and burst mapping
*
* Interleaving:
*
* Given 456 coded input bits, form 4 blocks of 114 bits:
*
* i(B, j) = c(n, k) k = 0, ..., 455
* n = 0, ..., N, N + 1, ...
* B = B_0 + 4n + (k mod 4)
* j = 2(49k mod 57) + ((k mod 8) div 4)
*
* Mapping on Burst:
*
* e(B, j) = i(B, j)
* e(B, 59 + j) = i(B, 57 + j) j = 0, ..., 56
* e(B, 57) = h_l(B)
* e(B, 58) = h_n(B)
*
* Where hl(B) and hn(B) are bits in burst B indicating flags.
*/
static void
xcch_deinterleave(sbit_t *cB, sbit_t *iB)
{
int j, k, B;
for (k=0; k<456; k++) {
B = k & 3;
j = 2 * ((49 * k) % 57) + ((k & 7) >> 2);
cB[k] = iB[B * 114 + j];
}
}
static void
xcch_interleave(ubit_t *cB, ubit_t *iB)
{
int j, k, B;
for (k=0; k<456; k++) {
B = k & 3;
j = 2 * ((49 * k) % 57) + ((k & 7) >> 2);
iB[B * 114 + j] = cB[k];
}
}
static void
xcch_burst_unmap(sbit_t *iB, sbit_t *eB, sbit_t *hl, sbit_t *hn)
{
memcpy(iB, eB, 57);
memcpy(iB+57, eB+59, 57);
if (hl)
*hl = eB[57];
if (hn)
*hn = eB[58];
}
static void
xcch_burst_map(ubit_t *iB, ubit_t *eB, ubit_t *hl, ubit_t *hn)
{
memcpy(eB, iB, 57);
memcpy(eB+59, iB+57, 57);
if (hl)
eB[57] = *hl;
if (hn)
eB[58] = *hn;
}
int
xcch_decode_cB(uint8_t *l2_data, sbit_t *cB)
{
ubit_t conv[224];
int rv;
osmo_conv_decode(&conv_xcch, cB, conv);
rv = osmo_crc64gen_check_bits(&xcch_crc40, conv, 184, conv+184);
if (rv)
return -1;
osmo_ubit2pbit_ext(l2_data, 0, conv, 0, 184, 1);
return 0;
}
int
xcch_decode(uint8_t *l2_data, sbit_t *bursts)
{
sbit_t iB[456], cB[456];
int i;
for (i=0; i<4; i++)
xcch_burst_unmap(&iB[i * 114], &bursts[i * 116], NULL, NULL);
xcch_deinterleave(cB, iB);
return xcch_decode_cB(l2_data, cB);
}
int
xcch_encode_cB(ubit_t *cB, uint8_t *l2_data)
{
ubit_t conv[224];
osmo_pbit2ubit_ext(conv, 0, l2_data, 0, 184, 1);
osmo_crc64gen_set_bits(&xcch_crc40, conv, 184, conv+184);
osmo_conv_encode(&conv_xcch, conv, cB);
return 0;
}
int
xcch_encode(ubit_t *bursts, uint8_t *l2_data)
{
ubit_t iB[456], cB[456], hl = 1, hn = 1;
int i;
xcch_encode_cB(cB, l2_data);
xcch_interleave(cB, iB);
for (i=0; i<4; i++)
xcch_burst_map(&iB[i * 114], &bursts[i * 116], &hl, &hn);
return 0;
}

10
src/osmo-bts-trx/xcch.h Normal file
View File

@ -0,0 +1,10 @@
#ifndef _XCCH_H
#define _XCCH_H
int xcch_decode_cB(uint8_t *l2_data, sbit_t *cB);
int xcch_decode(uint8_t *l2_data, sbit_t *bursts);
int xcch_encode_cB(ubit_t *cB, uint8_t *l2_data);
int xcch_encode(ubit_t *bursts, uint8_t *l2_data);
#endif /* _XCCH_H */