| /* |
| * (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 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 <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_ccu_descr *ccu_descr = obj; |
| 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 (!ccu_descr) { |
| LOGP(DL1IF, LOGL_ERROR, "PCU-DATA-IND: PDCH(ts=%u, arfcn=%u) no CCU context, tossing MAC block...\n", |
| ts, arfcn); |
| return -EINVAL; |
| } |
| 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_pdch(uint8_t bts_nr, uint8_t trx_no, uint32_t hlayer1, struct gsmtap_inst *gsmtap) |
| { |
| struct er_ccu_descr *ccu_descr; |
| |
| /* Note: We do not have enough information to really open anything at |
| * this point. We will just create the CCU context. */ |
| |
| ccu_descr = talloc_zero(tall_pcu_ctx, struct er_ccu_descr); |
| OSMO_ASSERT(ccu_descr); |
| ccu_descr->er_ccu_rx_cb = er_ccu_rx_cb; |
| ccu_descr->er_ccu_empty_cb = er_ccu_empty_cb; |
| ccu_descr->pcu.trx_no = trx_no; |
| ccu_descr->pcu.bts_nr = bts_nr; |
| |
| return ccu_descr; |
| } |
| |
| int l1if_close_pdch(void *obj) |
| { |
| struct er_ccu_descr *ccu_descr = obj; |
| |
| if (!ccu_descr) { |
| LOGP(DL1IF, LOGL_ERROR, "PCU-DATA-IND: no CCU context, cannot close unknown PDCH...\n"); |
| return -EINVAL; |
| } |
| |
| er_ccu_if_close(ccu_descr); |
| talloc_free(ccu_descr); |
| return 0; |
| } |
| |
| int l1if_connect_pdch(void *obj, uint8_t ts) |
| { |
| struct er_ccu_descr *ccu_descr = obj; |
| int rc; |
| |
| if (!ccu_descr) { |
| LOGP(DL1IF, LOGL_ERROR, "SETUP: PDCH(ts=%u) no CCU context, PDCH never opened before?\n", ts); |
| return -EINVAL; |
| } |
| |
| ccu_descr->pcu.ts = 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_ccu_descr *ccu_descr = obj; |
| |
| if (!ccu_descr) { |
| LOGP(DL1IF, LOGL_ERROR, "SETUP: PDCH(ts=%u) no CCU context, PDCH never opened before?\n", ts); |
| return -EINVAL; |
| } |
| |
| er_ccu_if_close(ccu_descr); |
| |
| return 0; |
| } |
| |
| int l1if_init(void) |
| { |
| er_ccu_if_init(tall_pcu_ctx); |
| return 0; |
| } |