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osmo-pcu/src/ericsson-rbs/er_ccu_l1_if.c

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/*
* (C) 2022 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
* All Rights Reserved
*
* Author: Philipp Maier
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <er_ccu_descr.h>
#include <er_ccu_if.h>
#include <string.h>
#include <errno.h>
#include <osmocom/pcu/pcuif_proto.h>
#include <osmocom/abis/e1_input.h>
#include <osmocom/abis/abis.h>
#include <osmocom/abis/e1_input.h>
#include <osmocom/trau/trau_sync.h>
#include <osmocom/trau/trau_pcu_ericsson.h>
#include <osmocom/gsm/gsm0502.h>
#include <osmocom/core/talloc.h>
#include <bts.h>
#include <pcu_l1_if.h>
#include <pcu_l1_if_phy.h>
extern void *tall_pcu_ctx;
const uint8_t fn_inc_table[4] = { 4, 4, 5, 0 };
const uint8_t blk_nr_table[4] = { 4, 4, 5, 0 };
#define SYNC_CHECK_INTERVAL GSM_TDMA_SUPERFRAME * 8
/* Subtrahend to convert Ericsson adjusted (block ending) fn to regular fn (uplink only) */
#define AFN_SUBTRAHEND 3
#define LOGPL1IF(ccu_descr, level, tag, fmt, args...) \
LOGP(DL1IF, level, "%s: PDCH(trx=%u,ts=%u) E1-line(line=%u,ts=%u,ss=%u) " fmt, \
tag, ccu_descr->pcu.trx_no, ccu_descr->pcu.ts, \
ccu_descr->e1_conn_pars->e1_nr, ccu_descr->e1_conn_pars->e1_ts, \
ccu_descr->e1_conn_pars->e1_ts_ss == E1_SUBSLOT_FULL ? 0 : ccu_descr->e1_conn_pars->e1_ts_ss, \
## args)
/* Calculate GPRS block number from frame number */
static uint8_t fn_to_block_nr(uint32_t fn)
{
/* Note: See also 3GPP TS 03.64 6.5.7.2.1,
* Mapping on the multiframe structure */
uint8_t rel_fn;
uint8_t super_block;
uint8_t local_block;
rel_fn = fn % 52;
/* Warn in case of frames that do not belong to a block */
if (rel_fn == 12 || rel_fn == 25 || rel_fn == 38 || rel_fn == 51)
LOGP(DL1IF, LOGL_ERROR, "Frame number is referencing invalid block!\n");
super_block = (rel_fn / 13);
local_block = rel_fn % 13 / 4;
return super_block * 3 + local_block;
}
static uint32_t fn_dl_advance(uint32_t fn, uint32_t n_blocks)
{
uint32_t i;
uint8_t inc_fn;
for (i = 0; i < n_blocks; i++) {
inc_fn = fn_inc_table[(fn % 13) / 4];
fn = GSM_TDMA_FN_SUM(fn, inc_fn);
}
return fn;
}
static bool mac_block_is_noise(struct er_gprs_trau_frame *trau_frame)
{
switch (trau_frame->u.ccu_data_ind.cs_hdr) {
case CS_OR_HDR_CS1:
case CS_OR_HDR_CS2:
case CS_OR_HDR_CS3:
case CS_OR_HDR_CS4:
if (!trau_frame->u.ccu_data_ind.u.gprs.parity_ok)
return true;
break;
case CS_OR_HDR_HDR1:
case CS_OR_HDR_HDR2:
case CS_OR_HDR_HDR3:
if (!trau_frame->u.ccu_data_ind.u.egprs.hdr_good)
return true;
if (!trau_frame->u.ccu_data_ind.u.egprs.data_good[0]
&& !trau_frame->u.ccu_data_ind.u.egprs.data_good[1])
return true;
break;
case CS_OR_HDR_AB:
/* We are not interested in receiving access bursts. */
return true;
}
/* No noise, this block is interesting for us. */
return false;
}
static void log_data_ind(struct er_ccu_descr *ccu_descr, struct er_gprs_trau_frame *trau_frame, uint32_t afn_ul_comp,
uint32_t afn_dl_comp)
{
switch (trau_frame->u.ccu_data_ind.cs_hdr) {
case CS_OR_HDR_CS1:
case CS_OR_HDR_CS2:
case CS_OR_HDR_CS3:
case CS_OR_HDR_CS4:
LOGPL1IF(ccu_descr, LOGL_DEBUG, "CCU-DATA-IND",
"tav=%u, dbe=%u, cs_hdr=%u, rx_lev=%u, est_acc_del_dev=%u,"
"block_qual=%u, parity_ok=%u, data=%s<==, afn_ul_comp=%u/%u\n", trau_frame->u.ccu_data_ind.tav,
trau_frame->u.ccu_data_ind.dbe, trau_frame->u.ccu_data_ind.cs_hdr,
trau_frame->u.ccu_data_ind.rx_lev, trau_frame->u.ccu_data_ind.est_acc_del_dev,
trau_frame->u.ccu_data_ind.u.gprs.block_qual, trau_frame->u.ccu_data_ind.u.gprs.parity_ok,
osmo_hexdump_nospc(trau_frame->u.ccu_data_ind.data, trau_frame->u.ccu_data_ind.data_len),
afn_ul_comp, afn_ul_comp % 52);
break;
case CS_OR_HDR_HDR1:
case CS_OR_HDR_HDR2:
case CS_OR_HDR_HDR3:
case CS_OR_HDR_AB:
LOGPL1IF(ccu_descr, LOGL_DEBUG, "CCU-DATA-IND",
"tav=%u, dbe=%u, cs_hdr=%u, rx_lev=%u, est_acc_del_dev=%u,"
"mean_bep=%u, cv_bep=%u, hdr_good=%u, data_good[0]=%u, data_good[1]=%u, data=%s<==, afn_ul_comp=%u/%u\n",
trau_frame->u.ccu_data_ind.tav, trau_frame->u.ccu_data_ind.dbe,
trau_frame->u.ccu_data_ind.cs_hdr, trau_frame->u.ccu_data_ind.rx_lev,
trau_frame->u.ccu_data_ind.est_acc_del_dev, trau_frame->u.ccu_data_ind.u.egprs.mean_bep,
trau_frame->u.ccu_data_ind.u.egprs.cv_bep, trau_frame->u.ccu_data_ind.u.egprs.hdr_good,
trau_frame->u.ccu_data_ind.u.egprs.data_good[0],
trau_frame->u.ccu_data_ind.u.egprs.data_good[1],
osmo_hexdump_nospc(trau_frame->u.ccu_data_ind.data, trau_frame->u.ccu_data_ind.data_len),
afn_ul_comp, afn_ul_comp % 52);
}
}
/* Receive block from CCU */
static void er_ccu_rx_cb(struct er_ccu_descr *ccu_descr, const ubit_t *bits, unsigned int num_bits)
{
int rc;
struct er_gprs_trau_frame trau_frame;
uint8_t inc_ul;
uint8_t inc_dl;
uint32_t afn_ul;
uint32_t afn_dl;
uint32_t afn_ul_comp;
uint32_t afn_dl_comp;
struct pcu_l1_meas meas = { 0 };
struct gprs_rlcmac_bts *bts;
struct gprs_rlcmac_pdch *pdch;
/* Compute the current frame numbers from the last frame number */
inc_ul = fn_inc_table[(ccu_descr->sync.last_afn_ul % 13) / 4];
inc_dl = fn_inc_table[(ccu_descr->sync.last_afn_dl % 13) / 4];
afn_ul = GSM_TDMA_FN_SUM(ccu_descr->sync.last_afn_ul, inc_ul);
afn_dl = GSM_TDMA_FN_SUM(ccu_descr->sync.last_afn_dl, inc_dl);
/* Compute compensated frame numbers. This will be the framenumbers we
* will use to exchange blocks with the PCU code. The following applies:
*
* 1. The uplink related frame numbers sent by the ericsson CCU refer to the end of a block. This is
* compensated by subtracting three frames.
* 2. The CCU downlink frame number runs one block past the uplink frame number. This needs to be
* compesated as well (+1).
* 3. The difference between the local (PCU) and the returned (CCU) pseq counter value is the number of blocks
* that the PCU must
* shift its downlink alignment in order to compensate the link latency between PCU and CCU. */
afn_ul_comp = GSM_TDMA_FN_SUB(afn_ul, AFN_SUBTRAHEND);
afn_dl_comp = afn_dl;
afn_dl_comp = fn_dl_advance(afn_dl_comp, GSM_TDMA_FN_DIFF(ccu_descr->sync.pseq_pcu, ccu_descr->sync.pseq_ccu) + 1);
LOGPL1IF(ccu_descr, LOGL_DEBUG, "CCU-SYNC",
"afn_ul=%u/%u, afn_dl=%u/%u, afn_diff=%u => afn_ul_comp=%u/%u, afn_dl_comp=%u/%u, afn_diff_comp=%u\n",
afn_ul, afn_ul % 52, afn_dl, afn_dl % 52, GSM_TDMA_FN_DIFF(afn_ul, afn_dl), afn_ul_comp,
afn_ul_comp % 52, afn_dl_comp, afn_dl_comp % 52, GSM_TDMA_FN_DIFF(afn_ul_comp, afn_dl_comp));
LOGPL1IF(ccu_descr, LOGL_DEBUG, "CCU-SYNC", "pseq_pcu=%u, pseq_ccu=%u, pseq_diff=%u\n",
ccu_descr->sync.pseq_pcu, ccu_descr->sync.pseq_ccu, GSM_TDMA_FN_DIFF(ccu_descr->sync.pseq_pcu, ccu_descr->sync.pseq_ccu));
/* Decode indication from CCU */
if (ccu_descr->e1_conn_pars->e1_ts_ss == E1_SUBSLOT_FULL)
rc = er_gprs_trau_frame_decode_64k(&trau_frame, bits);
else
rc = er_gprs_trau_frame_decode_16k(&trau_frame, bits);
if (rc < 0) {
LOGPL1IF(ccu_descr, LOGL_ERROR, "CCU-XXXX-IND",
"unable to decode uplink TRAU frame, afn_ul_comp=%u/%u\n", afn_ul_comp, afn_ul_comp % 52);
/* Report to the CCU that there is an issue with uplink TRAU frames, the CCU will then send
* a CCU-SYNC-IND within the next TRAU frame, so we can check if we are still in sync and trigger
* synchronization procedure if necessary. */
ccu_descr->sync.ul_frame_err = true;
goto skip;
}
switch (trau_frame.type) {
case ER_GPRS_TRAU_FT_SYNC:
if (trau_frame.u.ccu_sync_ind.pseq != 0x3FFFFF) {
LOGPL1IF(ccu_descr, LOGL_DEBUG, "CCU-SYNC-IND",
"tav=%u, dbe=%u, dfe=%u, pseq=%u, afn_ul=%u, afn_dl=%u\n",
trau_frame.u.ccu_sync_ind.tav, trau_frame.u.ccu_sync_ind.dbe,
trau_frame.u.ccu_sync_ind.dfe, trau_frame.u.ccu_sync_ind.pseq,
trau_frame.u.ccu_sync_ind.afn_ul, trau_frame.u.ccu_sync_ind.afn_dl);
/* Synchronize the current CCU PSEQ state */
ccu_descr->sync.pseq_ccu = trau_frame.u.ccu_sync_ind.pseq;
} else {
LOGPL1IF(ccu_descr, LOGL_DEBUG, "CCU-SYNC-IND",
"tav=%u, dbe=%u, dfe=%u, pseq=(none), afn_ul=%u, afn_dl=%u\n",
trau_frame.u.ccu_sync_ind.tav, trau_frame.u.ccu_sync_ind.dbe,
trau_frame.u.ccu_sync_ind.dfe, trau_frame.u.ccu_sync_ind.afn_ul,
trau_frame.u.ccu_sync_ind.afn_dl);
}
ccu_descr->sync.tav = trau_frame.u.ccu_sync_ind.tav;
/* Check if we are in sync with the CCU, if not trigger synchronization procedure */
if (afn_ul != trau_frame.u.ccu_sync_ind.afn_ul || afn_dl != trau_frame.u.ccu_sync_ind.afn_dl) {
if (afn_ul != trau_frame.u.ccu_sync_ind.afn_ul)
LOGPL1IF(ccu_descr, LOGL_NOTICE, "CCU-SYNC-IND",
"afn_ul=%u (computed) != afn_ul=%u (sync-ind) => delta=%u\n", afn_ul,
trau_frame.u.ccu_sync_ind.afn_ul,
GSM_TDMA_FN_DIFF(afn_ul, trau_frame.u.ccu_sync_ind.afn_ul));
if (afn_dl != trau_frame.u.ccu_sync_ind.afn_dl)
LOGPL1IF(ccu_descr, LOGL_NOTICE, "CCU-SYNC-IND",
"afn_dl=%u (computed) != afn_dl=%u (sync-ind) => delta=%u\n", afn_dl,
trau_frame.u.ccu_sync_ind.afn_dl,
GSM_TDMA_FN_DIFF(afn_dl, trau_frame.u.ccu_sync_ind.afn_dl));
LOGPL1IF(ccu_descr, LOGL_NOTICE, "CCU-SYNC-IND",
"FN jump detected, lost sync with CCU -- (re)synchronizing...\n");
ccu_descr->sync.ccu_synced = false;
} else {
LOGPL1IF(ccu_descr, LOGL_NOTICE, "CCU-SYNC-IND", "in sync with CCU\n");
ccu_descr->sync.ccu_synced = true;
}
/* Overwrite calculated afn_ul and afn_dl with the actual values from the SYNC indication */
afn_ul = trau_frame.u.ccu_sync_ind.afn_ul;
afn_dl = trau_frame.u.ccu_sync_ind.afn_dl;
break;
case ER_GPRS_TRAU_FT_DATA:
ccu_descr->sync.tav = trau_frame.u.ccu_data_ind.tav;
/* Ignore all data indications that contain only noise */
if (mac_block_is_noise(&trau_frame))
break;
log_data_ind(ccu_descr, &trau_frame, afn_ul_comp, afn_dl_comp);
/* Hand received MAC block into PCU */
bts = gprs_pcu_get_bts_by_nr(the_pcu, ccu_descr->pcu.bts_nr);
if (!bts)
break;
meas.have_rssi = 1;
meas.rssi = rxlev2dbm(trau_frame.u.ccu_data_ind.rx_lev);
meas.have_link_qual = 1;
meas.link_qual = trau_frame.u.ccu_data_ind.u.gprs.block_qual;
pdch = &bts->trx[ccu_descr->pcu.trx_no].pdch[ccu_descr->pcu.ts];
rc = pcu_rx_data_ind_pdtch(bts, pdch, trau_frame.u.ccu_data_ind.data,
trau_frame.u.ccu_data_ind.data_len, afn_ul_comp, &meas);
break;
default:
LOGPL1IF(ccu_descr, LOGL_ERROR, "CCU-XXXX-IND", "unhandled CCU indication!\n");
}
skip:
if (ccu_descr->sync.ccu_synced) {
bts = gprs_pcu_get_bts_by_nr(the_pcu, ccu_descr->pcu.bts_nr);
if (bts) {
/* The PCU timing is locked to the uplink fame number. The downlink frame number is advanced
* into the future so that the line latency is compensated and the frame arrives at the right
* point in time. */
pdch = &bts->trx[ccu_descr->pcu.trx_no].pdch[ccu_descr->pcu.ts];
pcu_rx_block_time(bts, pdch->trx->arfcn, afn_ul_comp, ccu_descr->pcu.ts);
rc = pcu_rx_rts_req_pdtch(bts, ccu_descr->pcu.trx_no, ccu_descr->pcu.ts, afn_dl_comp,
fn_to_block_nr(afn_dl_comp));
}
}
/* We do not receive sync indications in every cycle. When traffic is transferred we won't get frame numbers
* from the CCU. In this case we must update the last_afn_ul/dl values from the computed frame numbers
* (see above) */
ccu_descr->sync.last_afn_ul = afn_ul;
ccu_descr->sync.last_afn_dl = afn_dl;
ccu_descr->sync.pseq_pcu++;
ccu_descr->sync.pseq_ccu++;
}
static void er_ccu_empty_cb(struct er_ccu_descr *ccu_descr)
{
struct er_gprs_trau_frame trau_frame;
ubit_t trau_frame_encoded[ER_GPRS_TRAU_FRAME_LEN_64K];
int rc;
memset(&trau_frame, 0, sizeof(trau_frame));
trau_frame.u.pcu_sync_ind.pseq = ccu_descr->sync.pseq_pcu;
trau_frame.u.pcu_sync_ind.tav = ccu_descr->sync.tav;
trau_frame.u.pcu_sync_ind.fn_ul = 0x3FFFFF;
trau_frame.u.pcu_sync_ind.fn_dl = 0x3FFFFF;
trau_frame.u.pcu_sync_ind.fn_ss = 0x3FFFFF;
trau_frame.u.pcu_sync_ind.ls = 0x3FFFFF;
trau_frame.u.pcu_sync_ind.ss = 0x3FFFFF;
trau_frame.type = ER_GPRS_TRAU_FT_SYNC;
if (ccu_descr->e1_conn_pars->e1_ts_ss == E1_SUBSLOT_FULL)
rc = er_gprs_trau_frame_encode_64k(trau_frame_encoded, &trau_frame);
else
rc = er_gprs_trau_frame_encode_16k(trau_frame_encoded, &trau_frame);
if (rc < 0) {
LOGPL1IF(ccu_descr, LOGL_ERROR, "PCU-SYNC-IND", "unable to encode TRAU frame\n");
return;
}
LOGPL1IF(ccu_descr, LOGL_DEBUG, "PCU-SYNC-IND", "pseq=%u, tav=%u\n",
trau_frame.u.pcu_sync_ind.pseq, trau_frame.u.pcu_sync_ind.tav);
er_ccu_if_tx(ccu_descr, trau_frame_encoded, rc);
/* Make sure timing adjustment value is reset after use */
ccu_descr->sync.tav = TIME_ADJ_NONE;
}
/* use the length of the block to determine the coding scheme */
static int cs_hdr_from_len(uint8_t len)
{
switch (len) {
case 23:
return CS_OR_HDR_CS1;
case 34:
return CS_OR_HDR_CS2;
case 40:
return CS_OR_HDR_CS3;
case 54:
return CS_OR_HDR_CS4;
case 27:
case 33:
case 42:
case 49:
return CS_OR_HDR_HDR3;
case 60:
case 78:
return CS_OR_HDR_HDR2;
case 118:
case 142:
case 154:
return CS_OR_HDR_HDR1;
default:
return -EINVAL;
}
}
/* send packet data request to L1 */
int l1if_pdch_req(void *obj, uint8_t ts, int is_ptcch, uint32_t fn,
uint16_t arfcn, uint8_t block_nr, uint8_t *data, uint8_t len)
{
struct er_trx_descr *trx_descr = obj;
struct er_ccu_descr *ccu_descr;
struct er_gprs_trau_frame trau_frame;
ubit_t trau_frame_encoded[ER_GPRS_TRAU_FRAME_LEN_64K];
struct gprs_rlcmac_bts *bts;
int rc;
/* Make sure that the CCU is synchronized and connected. */
if (!trx_descr) {
LOGP(DL1IF, LOGL_ERROR, "PCU-DATA-IND: PDCH(ts=%u, arfcn=%u) no TRX context, tossing MAC block...\n",
ts, arfcn);
return -EINVAL;
}
ccu_descr = &trx_descr->ts_ccu_descr[ts];
if (!ccu_descr->link.ccu_connected) {
LOGPL1IF(ccu_descr, LOGL_NOTICE, "PCU-DATA-IND", "CCU not connected, tossing MAC block...\n");
return -EINVAL;
}
if (!ccu_descr->sync.ccu_synced) {
LOGPL1IF(ccu_descr, LOGL_NOTICE, "PCU-DATA-IND", "CCU not synchronized, tossing MAC block...\n");
return -EINVAL;
}
/* Hand received MAC block into PCU */
bts = gprs_pcu_get_bts_by_nr(the_pcu, ccu_descr->pcu.bts_nr);
if (!bts) {
LOGPL1IF(ccu_descr, LOGL_NOTICE, "PCU-DATA-IND", "no BTS, tossing MAC block...\n");
return -EINVAL;
}
memset(&trau_frame, 0, sizeof(trau_frame));
trau_frame.type = ER_GPRS_TRAU_FT_DATA;
rc = cs_hdr_from_len(len);
if (rc < 0) {
LOGPL1IF(ccu_descr, LOGL_ERROR, "PCU-DATA-IND",
"unable to encode TRAU frame, invalid CS or MCS value set\n");
return -EINVAL;
}
trau_frame.u.pcu_data_ind.cs_hdr = (enum er_cs_or_hdr)rc;
trau_frame.u.pcu_data_ind.tav = ccu_descr->sync.tav;
trau_frame.u.pcu_data_ind.ul_frame_err = ccu_descr->sync.ul_frame_err;
if (bts->mcs_mask)
trau_frame.u.pcu_data_ind.ul_chan_mode = ER_UL_CHMOD_NB_UNKN;
else
trau_frame.u.pcu_data_ind.ul_chan_mode = ER_UL_CHMOD_NB_GMSK;
OSMO_ASSERT(len < sizeof(trau_frame.u.pcu_data_ind.data));
memcpy(trau_frame.u.pcu_data_ind.data, data, len);
/* Regulary ignore one MAC block in uplink. The CCU will then send one CCU-SYNC-IND instead. We use this
* indication to check whether we are still in sync with the CCU. */
if (fn % SYNC_CHECK_INTERVAL == 0)
trau_frame.u.pcu_data_ind.ul_chan_mode = ER_UL_CHMOD_VOID;
if (ccu_descr->e1_conn_pars->e1_ts_ss == E1_SUBSLOT_FULL)
rc = er_gprs_trau_frame_encode_64k(trau_frame_encoded, &trau_frame);
else
rc = er_gprs_trau_frame_encode_16k(trau_frame_encoded, &trau_frame);
if (rc < 0) {
LOGPL1IF(ccu_descr, LOGL_ERROR, "PCU-DATA-IND", "unable to encode TRAU frame\n");
return -EINVAL;
}
LOGPL1IF(ccu_descr, LOGL_DEBUG, "PCU-DATA-IND",
"tav=%u, ul_frame_err=%u, cs_hdr=%u, ul_chan_mode=%u, atten_db=%u, timing_offset=%u,"
" data=%s==>, fn=%u/%u (comp)\n", trau_frame.u.pcu_data_ind.tav,
trau_frame.u.pcu_data_ind.ul_frame_err, trau_frame.u.pcu_data_ind.cs_hdr,
trau_frame.u.pcu_data_ind.ul_chan_mode, trau_frame.u.pcu_data_ind.atten_db,
trau_frame.u.pcu_data_ind.timing_offset, osmo_hexdump_nospc(trau_frame.u.pcu_data_ind.data, len), fn,
fn % 52);
er_ccu_if_tx(ccu_descr, trau_frame_encoded, rc);
/* Make sure timing adjustment value is reset after use */
ccu_descr->sync.tav = TIME_ADJ_NONE;
ccu_descr->sync.ul_frame_err = false;
return 0;
}
void *l1if_open_trx(uint8_t bts_nr, uint8_t trx_no, uint32_t hlayer1, struct gsmtap_inst *gsmtap)
{
struct er_trx_descr *trx_descr;
unsigned int i;
/* Note: We do not have enough information to really open anything at
* this point. We will just create the TRX context and fill it wit basic
* CCU context (one for each TS) */
trx_descr = talloc_zero(tall_pcu_ctx, struct er_trx_descr);
OSMO_ASSERT(trx_descr);
for (i = 0; i < ARRAY_SIZE(trx_descr->ts_ccu_descr); i++) {
trx_descr->ts_ccu_descr[i].er_ccu_rx_cb = er_ccu_rx_cb;
trx_descr->ts_ccu_descr[i].er_ccu_empty_cb = er_ccu_empty_cb;
trx_descr->ts_ccu_descr[i].pcu.trx_no = trx_no;
trx_descr->ts_ccu_descr[i].pcu.bts_nr = bts_nr;
trx_descr->ts_ccu_descr[i].pcu.ts = i;
}
return trx_descr;
}
int l1if_close_trx(void *obj)
{
struct er_trx_descr *trx_descr = obj;
unsigned int i;
if (!trx_descr) {
LOGP(DL1IF, LOGL_ERROR, "PCU-DATA-IND: no TRX context, cannot close unknown TRX...\n");
return -EINVAL;
}
for (i = 0; i < ARRAY_SIZE(trx_descr->ts_ccu_descr); i++)
er_ccu_if_close(&trx_descr->ts_ccu_descr[i]);
talloc_free(trx_descr);
return 0;
}
int l1if_connect_pdch(void *obj, uint8_t ts)
{
struct er_trx_descr *trx_descr = obj;
struct er_ccu_descr *ccu_descr;
int rc;
if (!trx_descr) {
LOGP(DL1IF, LOGL_ERROR, "SETUP: PDCH(ts=%u) no CCU context, TRX never opened before?\n", ts);
return -EINVAL;
}
ccu_descr = &trx_descr->ts_ccu_descr[ts];
rc = pcu_l1if_get_e1_ccu_conn_pars(&ccu_descr->e1_conn_pars, ccu_descr->pcu.bts_nr, ccu_descr->pcu.trx_no,
ccu_descr->pcu.ts);
if (rc < 0) {
LOGPL1IF(ccu_descr, LOGL_ERROR, "SETUP", "cannot find E1 connection parameters for CCU\n");
return -EINVAL;
}
rc = er_ccu_if_open(ccu_descr);
if (rc < 0)
return -EINVAL;
return 0;
}
int l1if_disconnect_pdch(void *obj, uint8_t ts)
{
struct er_trx_descr *trx_descr = obj;
struct er_ccu_descr *ccu_descr;
if (!trx_descr) {
LOGP(DL1IF, LOGL_ERROR, "SETUP: PDCH(ts=%u) no TRX context, TRX never opened before?\n", ts);
return -EINVAL;
}
ccu_descr = &trx_descr->ts_ccu_descr[ts];
er_ccu_if_close(ccu_descr);
return 0;
}
int l1if_init(void)
{
er_ccu_if_init(tall_pcu_ctx);
return 0;
}
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