OpenBSC

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first patch: mISDN handling
by Andreas.Eversberg 19 Apr '09

19 Apr '09

hi, finally i finished my patch about mISDN handling, reversed time slots and other things. i sent this mail again, because my last formatting might be detected as spam by "spam assassin" filters. you will find documentation text between this patch, so scroll and look. here is what i did: the first part will allow new options for bsc_hack: - alter LAC (location-area-code) - select mISDN card number other than 0 - release layer 2 after closing diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/bsc_hack.c openbsc/src/bsc_hack.c --- openbsc.orig/src/bsc_hack.c 2009-03-28 11:36:37.000000000 +0100 +++ openbsc/src/bsc_hack.c 2009-04-18 06:58:34.000000000 +0200 @@ -53,8 +53,11 @@ /* MCC and MNC for the Location Area Identifier */ static int MCC = 1; static int MNC = 1; +static int LAC = 1; static int ARFCN = HARDCODED_ARFCN; static enum gsm_bts_type BTS_TYPE = GSM_BTS_TYPE_BS11; +static int cardnr = 0; +static int release_l2 = 0; static const char *database_name = "hlr.sqlite3"; /* The following definitions are for OM and NM packets that we cannot yet @@ -901,7 +904,7 @@ gsmnet->name_long = "OpenBSC"; gsmnet->name_short = "OpenBSC"; bts = &gsmnet->bts[0]; - bts->location_area_code = 1; + bts->location_area_code = LAC; bts->trx[0].arfcn = ARFCN; /* Control Channel Description */ @@ -920,7 +923,7 @@ /* E1 mISDN input setup */ if (BTS_TYPE == GSM_BTS_TYPE_BS11) - return e1_config(bts); + return e1_config(bts, cardnr, release_l2); else return ia_config(bts); } @@ -952,14 +955,17 @@ printf(" Some useful help...\n"); printf(" -d option --debug=DRLL:DCC:DMM:DRR:DRSL:DNM enable debugging\n"); printf(" -s --disable-color\n"); - printf(" -n --network-code number(MNC) \n"); + printf(" -n --network-code number (MNC) \n"); printf(" -c --country-code number (MCC) \n"); + printf(" -L --location-area-code number (LAC) \n"); printf(" -f --arfcn number The frequency ARFCN\n"); printf(" -l --database db-name The database to use\n"); printf(" -a --authorize-everyone Allow everyone into the network.\n"); printf(" -r --reject-cause number The reject cause for LOCATION UPDATING REJECT.\n"); printf(" -p --pcap file The filename of the pcap file\n"); printf(" -t --bts-type type The BTS type (bs11, nanobts900, nanobts1800)\n"); + printf(" -C --cardnr number For bs11 select E1 card number other than 0\n"); + printf(" -R --release-l2 Releases mISDN layer 2 after exit, to unload +driver.\n"); printf(" -h --help this text\n"); } @@ -973,16 +979,19 @@ {"disable-color", 0, 0, 's'}, {"network-code", 1, 0, 'n'}, {"country-code", 1, 0, 'c'}, + {"location-area-code", 1, 0, 'L'}, {"database", 1, 0, 'l'}, {"authorize-everyone", 0, 0, 'a'}, {"reject-cause", 1, 0, 'r'}, {"pcap", 1, 0, 'p'}, {"arfcn", 1, 0, 'f'}, {"bts-type", 1, 0, 't'}, + {"cardnr", 1, 0, 'C'}, + {"release-l2", 0, 0, 'R'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, "hc:n:d:sar:p:f:t:", + c = getopt_long(argc, argv, "hc:n:d:sar:p:f:t:C:RL:", long_options, &option_index); if (c == -1) break; @@ -1004,6 +1013,9 @@ case 'c': MCC = atoi(optarg); break; + case 'L': + LAC = atoi(optarg); + break; case 'f': ARFCN = atoi(optarg); break; @@ -1022,6 +1034,12 @@ case 't': BTS_TYPE = parse_btstype(optarg); break; + case 'C': + cardnr = atoi(optarg); + break; + case 'R': + release_l2 = 1; + break; default: /* ignore */ break; the next part will create both e1 time slots for audio traffic. this is required, because uninitialized slots cause segementation faults due to invalid structure pointers. i tested it, by using making calls on four phones. diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/e1_config.c openbsc/src/e1_config.c --- openbsc.orig/src/e1_config.c 2009-03-28 11:36:37.000000000 +0100 +++ openbsc/src/e1_config.c 2009-04-19 13:24:20.000000000 +0200 @@ -15,7 +15,7 @@ #define TEI_RSL 1 /* do some compiled-in configuration for our BTS/E1 setup */ -int e1_config(struct gsm_bts *bts) +int e1_config(struct gsm_bts *bts, int cardnr, int l2_release) { struct e1inp_line *line; struct e1inp_ts *sign_ts; @@ -29,7 +29,7 @@ /* create E1 timeslots for signalling and TRAU frames */ e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN); e1inp_ts_config(&line->ts[2-1], line, E1INP_TS_TYPE_TRAU); - //e1inp_ts_config(&line->ts[3-1], line, E1INP_TS_TYPE_TRAU); + e1inp_ts_config(&line->ts[3-1], line, E1INP_TS_TYPE_TRAU); /* create signalling links for TS1 */ sign_ts = &line->ts[1-1]; @@ -47,13 +47,11 @@ subch_demux_activate(&line->ts[2-1].trau.demux, 2); subch_demux_activate(&line->ts[2-1].trau.demux, 3); -#if 0 /* enable subchannel demuxer on TS3 */ subch_demux_activate(&line->ts[3-1].trau.demux, 0); subch_demux_activate(&line->ts[3-1].trau.demux, 1); subch_demux_activate(&line->ts[3-1].trau.demux, 2); subch_demux_activate(&line->ts[3-1].trau.demux, 3); -#endif #ifdef HAVE_TRX1 /* create E1 timeslots for TRAU frames of TRX1 */ @@ -68,7 +66,7 @@ bts->trx[1].rsl_link = rsl_link; #endif - return mi_setup(0, line); + return mi_setup(cardnr, line, l2_release); } /* do some compiled-in configuration for our BTS/E1 setup */ then i changed the inclusion of mISDN headers. the mISDNif.h from /usr/include/mISDNuser must be used. in e1_input.c is no mISDN header required, so i commented them out. in misdn.c i changed the definition of AF_ISDN and PF_ISDN. compat_af_isdn.h will provide correct protocol family. in order to resolve correct protocol family, init_af_isdn() must be called. this will then work with kernel release and with GIT release. (remember that the current kernel does not have the sapi extension in it, so use GIT.) in order to solve the transmission delay problem (usleep(100000)) on the timeslot 1, i added a timer to the timeslot. this timer will be started after a tx-frame is dequeued. the BSC_FD_WRITE flag will be cleared, because we do not require to write until the timer expires. after timeout event, the BSC_FD_WRITE is set, even if no frame is in the queue. the subsequent write event will dequeue the frame and restart the timer again (if a frame is in the tx-queue). the DL_ESTABLISH_IND will tell use when we can use the layer 2 link. i replaced MPH_ACTIVATE_IND. diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/e1_input.c openbsc/src/e1_input.c --- openbsc.orig/src/e1_input.c 2009-03-28 11:36:37.000000000 +0100 +++ openbsc/src/e1_input.c 2009-04-19 13:20:00.000000000 +0200 @@ -31,12 +31,10 @@ #include <sys/socket.h> #include <sys/ioctl.h> #include <arpa/inet.h> -#include <mISDNif.h> +//#include <mISDNuser/mISDNif.h> -//#define AF_COMPATIBILITY_FUNC -//#include <compat_af_isdn.h> -#define AF_ISDN 34 -#define PF_ISDN AF_ISDN +//#define MISDN_OLD_AF_COMPATIBILITY +//#include <mISDNuser/compat_af_isdn.h> #include <openbsc/select.h> #include <openbsc/msgb.h> @@ -223,6 +221,7 @@ { struct e1inp_sign_link *sign_link; struct e1inp_driver *e1inp_driver; + struct e1inp_ts *e1i_ts; msg->l2h = msg->data; @@ -232,11 +231,16 @@ } sign_link = msg->trx->rsl_link; + e1i_ts = sign_link->ts; + + if (!timer_pending(&e1i_ts->sign.tx_timer)) { + /* notify the driver we have something to write */ + e1inp_driver = sign_link->ts->line->driver; + e1inp_driver->want_write(e1i_ts); + } + msgb_enqueue(&sign_link->tx_list, msg); - /* notify the driver we have something to write */ - e1inp_driver = sign_link->ts->line->driver; - e1inp_driver->want_write(sign_link->ts); return 0; } @@ -245,6 +249,7 @@ { struct e1inp_sign_link *sign_link; struct e1inp_driver *e1inp_driver; + struct e1inp_ts *e1i_ts; msg->l2h = msg->data; @@ -254,11 +259,15 @@ } sign_link = msg->trx->bts->oml_link; - msgb_enqueue(&sign_link->tx_list, msg); + e1i_ts = sign_link->ts; - /* notify the driver we have something to write */ - e1inp_driver = sign_link->ts->line->driver; - e1inp_driver->want_write(sign_link->ts); + if (!timer_pending(&e1i_ts->sign.tx_timer)) { + /* notify the driver we have something to write */ + e1inp_driver = sign_link->ts->line->driver; + e1inp_driver->want_write(e1i_ts); + } + + msgb_enqueue(&sign_link->tx_list, msg); return 0; } diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/input/misdn.c openbsc/src/input/misdn.c --- openbsc.orig/src/input/misdn.c 2009-03-28 11:36:36.000000000 +0100 +++ openbsc/src/input/misdn.c 2009-04-19 13:20:20.000000000 +0200 @@ -32,12 +32,11 @@ #include <sys/socket.h> #include <sys/ioctl.h> #include <arpa/inet.h> -#include <mISDNif.h> +#include <mISDNuser/mISDNif.h> -//#define AF_COMPATIBILITY_FUNC -//#include <compat_af_isdn.h> -#define AF_ISDN 34 -#define PF_ISDN AF_ISDN +#define MISDN_OLD_AF_COMPATIBILITY +#define AF_COMPATIBILITY_FUNC +#include <mISDNuser/compat_af_isdn.h> #include <openbsc/select.h> #include <openbsc/msgb.h> @@ -114,8 +113,10 @@ return ret; } - if (alen != sizeof(l2addr)) + if (alen != sizeof(l2addr)) { + fprintf(stderr, "error len\n"); return -EINVAL; + } msgb_put(msg, ret); @@ -129,7 +130,7 @@ case DL_INFORMATION_IND: /* mISDN tells us which channel number is allocated for this * tuple of (SAPI, TEI). */ - DEBUGP(DMI, "use channel(%d) sapi(%d) tei(%d) for now\n", + DEBUGP(DMI, "DL_INFORMATION_IND: channel(%d) sapi(%d) tei(%d)\n", l2addr.channel, l2addr.sapi, l2addr.tei); link = e1inp_lookup_sign_link(e1i_ts, l2addr.tei, l2addr.sapi); if (!link) { @@ -140,10 +141,16 @@ /* save the channel number in the driver private struct */ link->driver.misdn.channel = l2addr.channel; break; - case MPH_ACTIVATE_IND: +// case MPH_ACTIVATE_IND: + case DL_ESTABLISH_IND: + DEBUGP(DMI, "DL_ESTABLISH_IND: channel(%d) sapi(%d) tei(%d)\n", + l2addr.channel, l2addr.sapi, l2addr.tei); ret = e1inp_event(e1i_ts, EVT_E1_TEI_UP, l2addr.tei, l2addr.sapi); break; - case MPH_DEACTIVATE_IND: +// case MPH_DEACTIVATE_IND: + case DL_RELEASE_IND: + DEBUGP(DMI, "DL_RELEASE_IND: channel(%d) sapi(%d) tei(%d)\n", + l2addr.channel, l2addr.sapi, l2addr.tei); ret = e1inp_event(e1i_ts, EVT_E1_TEI_DN, l2addr.tei, l2addr.sapi); break; case DL_DATA_IND: @@ -157,6 +164,27 @@ return ret; } +static int ts_want_write(struct e1inp_ts *e1i_ts) { + /* We never include the mISDN B-Channel FD into the + * writeset, since it doesn't support poll() based + * write flow control */ + if (e1i_ts->type == E1INP_TS_TYPE_TRAU) + return 0; + + e1i_ts->driver.misdn.fd.when |= BSC_FD_WRITE; + + return 0; +} + +static void timeout_ts1_write(void *data) { + struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data; + + /* trigger write of ts1, due to tx delay timer */ + ts_want_write(e1i_ts); +} + static int handle_ts1_write(struct bsc_fd *bfd) { struct e1inp_line *line = bfd->data; @@ -169,10 +197,12 @@ u_int8_t *l2_data; int ret; + bfd->when &= ~BSC_FD_WRITE; + /* get the next msg for this timeslot */ msg = e1inp_tx_ts(e1i_ts, &sign_link); if (!msg) { - bfd->when &= ~BSC_FD_WRITE; + /* no message after tx delay timer */ return 0; } @@ -182,8 +212,8 @@ hh = (struct mISDNhead *) msgb_push(msg, sizeof(*hh)); hh->prim = DL_DATA_REQ; - DEBUGP(DMI, "TX TEI(%d): %s\n", sign_link->tei, - hexdump(l2_data, msg->len - MISDN_HEADER_LEN)); + DEBUGP(DMI, "TX TEI(%d) SAPI(%d): %s\n", sign_link->tei, + sign_link->sapi, hexdump(l2_data, msg->len - MISDN_HEADER_LEN)); /* construct the sockaddr */ sa.family = AF_ISDN; @@ -193,10 +223,14 @@ ret = sendto(bfd->fd, msg->data, msg->len, 0, (struct sockaddr *)&sa, sizeof(sa)); + if (ret < 0) + fprintf(stderr, "sendto failed %d\n", ret); msgb_free(msg); - /* FIXME: this has to go */ - usleep(100000); + /* set tx delay timer for next event */ + e1i_ts->sign.tx_timer.cb = timeout_ts1_write; + e1i_ts->sign.tx_timer.data = e1i_ts; + schedule_timer(&e1i_ts->sign.tx_timer, 0, 50000); return ret; } @@ -253,8 +287,9 @@ msgb_put(msg, ret); - DEBUGP(DMIB, "<= BCHAN len = %d, prim(0x%x) id(0x%x): %s\n", - ret, hh->prim, hh->id, get_prim_name(hh->prim)); + if (hh->prim != PH_CONTROL_IND) + DEBUGP(DMIB, "<= BCHAN len = %d, prim(0x%x) id(0x%x): %s\n", + ret, hh->prim, hh->id, get_prim_name(hh->prim)); switch (hh->prim) { case PH_DATA_IND: @@ -332,28 +367,16 @@ return ret; } -static int ts_want_write(struct e1inp_ts *e1i_ts) -{ - /* We never include the mISDN B-Channel FD into the - * writeset, since it doesn't support poll() based - * write flow control */ - if (e1i_ts->type == E1INP_TS_TYPE_TRAU) - return 0; - - e1i_ts->driver.misdn.fd.when |= BSC_FD_WRITE; - - return 0; -} - struct e1inp_driver misdn_driver = { .name = "mISDNuser", .want_write = ts_want_write, }; -static int mi_e1_setup(struct e1inp_line *line) +static int mi_e1_setup(struct e1inp_line *line, int release_l2) { struct mi_e1_handle *e1h = line->driver_data; int ts, ret; + int clean = 1; /* TS0 is CRC4, don't need any fd for it */ for (ts = 1; ts < NUM_E1_TS; ts++) { @@ -384,8 +407,8 @@ } if (bfd->fd < 0) { - fprintf(stderr, "could not open socket %s\n", - strerror(errno)); + fprintf(stderr, "%s could not open socket %s\n", + __func__, strerror(errno)); return bfd->fd; } @@ -395,8 +418,6 @@ switch (e1i_ts->type) { case E1INP_TS_TYPE_SIGN: addr.channel = 0; - /* SAPI not supported yet in kernel */ - //addr.sapi = e1inp_ts->sign.sapi; addr.sapi = 0; addr.tei = GROUP_TEI; break; @@ -415,6 +436,13 @@ strerror(errno)); return -EIO; } + if (e1i_ts->type == E1INP_TS_TYPE_SIGN && release_l2) { + ret = ioctl(bfd->fd, IMCLEAR_L2, &clean); + if (ret < 0) { + fprintf(stderr, "could not send IOCTL IMCLEAN_L2 %s\n", strerror(errno)); + return -EIO; + } + } /* FIXME: only activate B-Channels once we start to * use them to conserve CPU power */ @@ -432,12 +460,14 @@ return 0; } -int mi_setup(int cardnr, struct e1inp_line *line) +int mi_setup(int cardnr, struct e1inp_line *line, int release_l2) { struct mi_e1_handle *e1h; int sk, ret, cnt; struct mISDN_devinfo devinfo; + init_af_isdn(); + /* register the driver with the core */ /* FIXME: do this in the plugin initializer function */ ret = e1inp_driver_register(&misdn_driver); @@ -457,7 +487,7 @@ /* open the ISDN card device */ sk = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE); if (sk < 0) { - fprintf(stderr, "could not open socket %s\n", strerror(errno)); + fprintf(stderr, "%s could not open socket %s\n", __func__, +strerror(errno)); return sk; } @@ -484,9 +514,20 @@ fprintf(stdout, " protocol: %d\n", devinfo.protocol); fprintf(stdout, " nrbchan: %d\n", devinfo.nrbchan); fprintf(stdout, " name: %s\n", devinfo.name); +#else + printf("using device %d\n", e1h->cardnr); #endif - ret = mi_e1_setup(line); + if (!(devinfo.Dprotocols & (1 << ISDN_P_NT_E1))) { + fprintf(stderr, "error: card is not of type E1 (NT-mode)\n"); + return -EINVAL; + } + if (devinfo.nrbchan != 30) { + fprintf(stderr, "error: E1 card has no 30 B-channels\n"); + return -EINVAL; + } + + ret = mi_e1_setup(line, release_l2); if (ret) return ret; the subchanneling is reversed in my case. maybe we can use "#ifdef" until we know why this works for me and not in the reverse case: bit order "87654321" work, but "21436587" does not. here is my theory why this works for others: first i enabled second b-channel, so i expect that others have it disabled. because we use timeslot 1 of TRX for signalling, others can use just 3 timeslots on TRX for audio, and can make no more than one call at a time, because two slots are required for a call. in my case, i have the first call on time slot 3 and 4 (channel 2 and 3 on TRX). i did not debug why channel 1 is not selected for first call. if others use time slot 2 and 3 (channel 1 and 2 on TRX), it does not matter if the channel order is swapped, because slot 2 is swapped with slot 3, and both will not change their position. you will not notice the difference, until slots on different positions are used. diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/subchan_demux.c openbsc/src/subchan_demux.c --- openbsc.orig/src/subchan_demux.c 2009-02-23 17:58:34.000000000 +0100 +++ openbsc/src/subchan_demux.c 2009-04-19 13:30:08.000000000 +0200 @@ -100,7 +100,7 @@ if (!(dmx->chan_activ & (1 << c))) continue; - inbits = inbyte >> ((3-c)*2); + inbits = inbyte >> (c << 1); /* two bits for each subchannel */ if (inbits & 0x01) @@ -230,10 +230,10 @@ int rc; /* combine two bits of every subchan */ - rc = get_subch_bits(mx, 3, &bits[0], 2); - rc = get_subch_bits(mx, 2, &bits[2], 2); - rc = get_subch_bits(mx, 1, &bits[4], 2); - rc = get_subch_bits(mx, 0, &bits[6], 2); + rc = get_subch_bits(mx, 0, &bits[0], 2); + rc = get_subch_bits(mx, 1, &bits[2], 2); + rc = get_subch_bits(mx, 2, &bits[4], 2); + rc = get_subch_bits(mx, 3, &bits[6], 2); *byte = compact_bits(bits); finally the includes: diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/include/openbsc/e1_input.h openbsc/include/openbsc/e1_input.h --- openbsc.orig/include/openbsc/e1_input.h 2009-03-28 11:36:36.000000000 +0100 +++ openbsc/include/openbsc/e1_input.h 2009-04-19 12:46:37.000000000 +0200 @@ -63,7 +63,10 @@ union { struct { + /* list of all signalling links on this TS */ struct llist_head sign_links; + /* timer when to dequeue next frame */ + struct timer_list tx_timer; } sign; struct { /* subchannel demuxer for frames from E1 */ @@ -142,7 +145,7 @@ struct subch_mux *e1inp_get_mux(u_int8_t e1_nr, u_int8_t ts_nr); /* e1_config.c */ -int e1_config(struct gsm_bts *bts); +int e1_config(struct gsm_bts *bts, int card, int l2_release); int ia_config(struct gsm_bts *bts); int ipaccess_setup(struct e1inp_line *line); diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/include/openbsc/misdn.h openbsc/include/openbsc/misdn.h --- openbsc.orig/include/openbsc/misdn.h 2009-03-28 11:36:36.000000000 +0100 +++ openbsc/include/openbsc/misdn.h 2009-04-19 12:48:28.000000000 +0200 @@ -22,7 +22,7 @@ #include "e1_input.h" -int mi_setup(int cardnr, struct e1inp_line *line); +int mi_setup(int cardnr, struct e1inp_line *line, int l2_release); void mi_set_pcap_fd(int fd); int _abis_nm_sendmsg(struct msgb *msg);

1 0

first patch: mISDN handling
by Andreas.Eversberg 19 Apr '09

19 Apr '09

hi, finally i finished my patch about mISDN handling, reversed time slots and other things. here is what i did: the first part will allow new options for bsc_hack: - alter LAC (location-area-code) - select mISDN card number other than 0 - release layer 2 after closing diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/bsc_hack.c openbsc/src/bsc_hack.c --- openbsc.orig/src/bsc_hack.c 2009-03-28 11:36:37.000000000 +0100 +++ openbsc/src/bsc_hack.c 2009-04-18 06:58:34.000000000 +0200 @@ -53,8 +53,11 @@ /* MCC and MNC for the Location Area Identifier */ static int MCC = 1; static int MNC = 1; +static int LAC = 1; static int ARFCN = HARDCODED_ARFCN; static enum gsm_bts_type BTS_TYPE = GSM_BTS_TYPE_BS11; +static int cardnr = 0; +static int release_l2 = 0; static const char *database_name = "hlr.sqlite3"; /* The following definitions are for OM and NM packets that we cannot yet @@ -901,7 +904,7 @@ gsmnet->name_long = "OpenBSC"; gsmnet->name_short = "OpenBSC"; bts = &gsmnet->bts[0]; - bts->location_area_code = 1; + bts->location_area_code = LAC; bts->trx[0].arfcn = ARFCN; /* Control Channel Description */ @@ -920,7 +923,7 @@ /* E1 mISDN input setup */ if (BTS_TYPE == GSM_BTS_TYPE_BS11) - return e1_config(bts); + return e1_config(bts, cardnr, release_l2); else return ia_config(bts); } @@ -952,14 +955,17 @@ printf(" Some useful help...\n"); printf(" -d option --debug=DRLL:DCC:DMM:DRR:DRSL:DNM enable debugging\n"); printf(" -s --disable-color\n"); - printf(" -n --network-code number(MNC) \n"); + printf(" -n --network-code number (MNC) \n"); printf(" -c --country-code number (MCC) \n"); + printf(" -L --location-area-code number (LAC) \n"); printf(" -f --arfcn number The frequency ARFCN\n"); printf(" -l --database db-name The database to use\n"); printf(" -a --authorize-everyone Allow everyone into the network.\n"); printf(" -r --reject-cause number The reject cause for LOCATION UPDATING REJECT.\n"); printf(" -p --pcap file The filename of the pcap file\n"); printf(" -t --bts-type type The BTS type (bs11, nanobts900, nanobts1800)\n"); + printf(" -C --cardnr number For bs11 select E1 card number other than 0\n"); + printf(" -R --release-l2 Releases mISDN layer 2 after exit, to unload driver.\n"); printf(" -h --help this text\n"); } @@ -973,16 +979,19 @@ {"disable-color", 0, 0, 's'}, {"network-code", 1, 0, 'n'}, {"country-code", 1, 0, 'c'}, + {"location-area-code", 1, 0, 'L'}, {"database", 1, 0, 'l'}, {"authorize-everyone", 0, 0, 'a'}, {"reject-cause", 1, 0, 'r'}, {"pcap", 1, 0, 'p'}, {"arfcn", 1, 0, 'f'}, {"bts-type", 1, 0, 't'}, + {"cardnr", 1, 0, 'C'}, + {"release-l2", 0, 0, 'R'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, "hc:n:d:sar:p:f:t:", + c = getopt_long(argc, argv, "hc:n:d:sar:p:f:t:C:RL:", long_options, &option_index); if (c == -1) break; @@ -1004,6 +1013,9 @@ case 'c': MCC = atoi(optarg); break; + case 'L': + LAC = atoi(optarg); + break; case 'f': ARFCN = atoi(optarg); break; @@ -1022,6 +1034,12 @@ case 't': BTS_TYPE = parse_btstype(optarg); break; + case 'C': + cardnr = atoi(optarg); + break; + case 'R': + release_l2 = 1; + break; default: /* ignore */ break; the next part will create both time slots for audio traffic. this is required, because uninitialized slots cause segementation faults due to invalid structure pointers. diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/e1_config.c openbsc/src/e1_config.c --- openbsc.orig/src/e1_config.c 2009-03-28 11:36:37.000000000 +0100 +++ openbsc/src/e1_config.c 2009-04-19 13:24:20.000000000 +0200 @@ -15,7 +15,7 @@ #define TEI_RSL 1 /* do some compiled-in configuration for our BTS/E1 setup */ -int e1_config(struct gsm_bts *bts) +int e1_config(struct gsm_bts *bts, int cardnr, int l2_release) { struct e1inp_line *line; struct e1inp_ts *sign_ts; @@ -29,7 +29,7 @@ /* create E1 timeslots for signalling and TRAU frames */ e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN); e1inp_ts_config(&line->ts[2-1], line, E1INP_TS_TYPE_TRAU); - //e1inp_ts_config(&line->ts[3-1], line, E1INP_TS_TYPE_TRAU); + e1inp_ts_config(&line->ts[3-1], line, E1INP_TS_TYPE_TRAU); /* create signalling links for TS1 */ sign_ts = &line->ts[1-1]; @@ -47,13 +47,11 @@ subch_demux_activate(&line->ts[2-1].trau.demux, 2); subch_demux_activate(&line->ts[2-1].trau.demux, 3); -#if 0 /* enable subchannel demuxer on TS3 */ subch_demux_activate(&line->ts[3-1].trau.demux, 0); subch_demux_activate(&line->ts[3-1].trau.demux, 1); subch_demux_activate(&line->ts[3-1].trau.demux, 2); subch_demux_activate(&line->ts[3-1].trau.demux, 3); -#endif #ifdef HAVE_TRX1 /* create E1 timeslots for TRAU frames of TRX1 */ @@ -68,7 +66,7 @@ bts->trx[1].rsl_link = rsl_link; #endif - return mi_setup(0, line); + return mi_setup(cardnr, line, l2_release); } /* do some compiled-in configuration for our BTS/E1 setup */ then i changed the inclusion of mISDN headers. the mISDNif.h from /usr/include/mISDNuser must be used. in e1_input.c is no mISDN header required, so i commented them out. in misdn.c i changed the definition of AF_ISDN and PF_ISDN. compat_af_isdn.h will provide correct protocol family. in order to resolve correct protocol family, init_af_isdn() must be called. this will then work with kernel release and with GIT release. (remember that the current kernel does not have the sapi extension in it, so use GIT.) in order to solve the transmission delay problem (usleep(100000)) on the timeslot 1, i added a timer to the timeslot. this timer will be started after a tx-frame is dequeued. the BSC_FD_WRITE flag will be cleared, because we do not require to write until the timer expires. after timeout event, the BSC_FD_WRITE is set, even if no frame is in the queue. the subsequent write event will dequeue the frame and restart the timer again (if a frame is in the tx-queue). the DL_ESTABLISH_IND will tell use when we can use the layer 2 link. i replaced MPH_ACTIVATE_IND. diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/e1_input.c openbsc/src/e1_input.c --- openbsc.orig/src/e1_input.c 2009-03-28 11:36:37.000000000 +0100 +++ openbsc/src/e1_input.c 2009-04-19 13:20:00.000000000 +0200 @@ -31,12 +31,10 @@ #include <sys/socket.h> #include <sys/ioctl.h> #include <arpa/inet.h> -#include <mISDNif.h> +//#include <mISDNuser/mISDNif.h> -//#define AF_COMPATIBILITY_FUNC -//#include <compat_af_isdn.h> -#define AF_ISDN 34 -#define PF_ISDN AF_ISDN +//#define MISDN_OLD_AF_COMPATIBILITY +//#include <mISDNuser/compat_af_isdn.h> #include <openbsc/select.h> #include <openbsc/msgb.h> @@ -223,6 +221,7 @@ { struct e1inp_sign_link *sign_link; struct e1inp_driver *e1inp_driver; + struct e1inp_ts *e1i_ts; msg->l2h = msg->data; @@ -232,11 +231,16 @@ } sign_link = msg->trx->rsl_link; + e1i_ts = sign_link->ts; + + if (!timer_pending(&e1i_ts->sign.tx_timer)) { + /* notify the driver we have something to write */ + e1inp_driver = sign_link->ts->line->driver; + e1inp_driver->want_write(e1i_ts); + } + msgb_enqueue(&sign_link->tx_list, msg); - /* notify the driver we have something to write */ - e1inp_driver = sign_link->ts->line->driver; - e1inp_driver->want_write(sign_link->ts); return 0; } @@ -245,6 +249,7 @@ { struct e1inp_sign_link *sign_link; struct e1inp_driver *e1inp_driver; + struct e1inp_ts *e1i_ts; msg->l2h = msg->data; @@ -254,11 +259,15 @@ } sign_link = msg->trx->bts->oml_link; - msgb_enqueue(&sign_link->tx_list, msg); + e1i_ts = sign_link->ts; - /* notify the driver we have something to write */ - e1inp_driver = sign_link->ts->line->driver; - e1inp_driver->want_write(sign_link->ts); + if (!timer_pending(&e1i_ts->sign.tx_timer)) { + /* notify the driver we have something to write */ + e1inp_driver = sign_link->ts->line->driver; + e1inp_driver->want_write(e1i_ts); + } + + msgb_enqueue(&sign_link->tx_list, msg); return 0; } diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/input/misdn.c openbsc/src/input/misdn.c --- openbsc.orig/src/input/misdn.c 2009-03-28 11:36:36.000000000 +0100 +++ openbsc/src/input/misdn.c 2009-04-19 13:20:20.000000000 +0200 @@ -32,12 +32,11 @@ #include <sys/socket.h> #include <sys/ioctl.h> #include <arpa/inet.h> -#include <mISDNif.h> +#include <mISDNuser/mISDNif.h> -//#define AF_COMPATIBILITY_FUNC -//#include <compat_af_isdn.h> -#define AF_ISDN 34 -#define PF_ISDN AF_ISDN +#define MISDN_OLD_AF_COMPATIBILITY +#define AF_COMPATIBILITY_FUNC +#include <mISDNuser/compat_af_isdn.h> #include <openbsc/select.h> #include <openbsc/msgb.h> @@ -114,8 +113,10 @@ return ret; } - if (alen != sizeof(l2addr)) + if (alen != sizeof(l2addr)) { + fprintf(stderr, "error len\n"); return -EINVAL; + } msgb_put(msg, ret); @@ -129,7 +130,7 @@ case DL_INFORMATION_IND: /* mISDN tells us which channel number is allocated for this * tuple of (SAPI, TEI). */ - DEBUGP(DMI, "use channel(%d) sapi(%d) tei(%d) for now\n", + DEBUGP(DMI, "DL_INFORMATION_IND: channel(%d) sapi(%d) tei(%d)\n", l2addr.channel, l2addr.sapi, l2addr.tei); link = e1inp_lookup_sign_link(e1i_ts, l2addr.tei, l2addr.sapi); if (!link) { @@ -140,10 +141,16 @@ /* save the channel number in the driver private struct */ link->driver.misdn.channel = l2addr.channel; break; - case MPH_ACTIVATE_IND: +// case MPH_ACTIVATE_IND: + case DL_ESTABLISH_IND: + DEBUGP(DMI, "DL_ESTABLISH_IND: channel(%d) sapi(%d) tei(%d)\n", + l2addr.channel, l2addr.sapi, l2addr.tei); ret = e1inp_event(e1i_ts, EVT_E1_TEI_UP, l2addr.tei, l2addr.sapi); break; - case MPH_DEACTIVATE_IND: +// case MPH_DEACTIVATE_IND: + case DL_RELEASE_IND: + DEBUGP(DMI, "DL_RELEASE_IND: channel(%d) sapi(%d) tei(%d)\n", + l2addr.channel, l2addr.sapi, l2addr.tei); ret = e1inp_event(e1i_ts, EVT_E1_TEI_DN, l2addr.tei, l2addr.sapi); break; case DL_DATA_IND: @@ -157,6 +164,27 @@ return ret; } +static int ts_want_write(struct e1inp_ts *e1i_ts) +{ + /* We never include the mISDN B-Channel FD into the + * writeset, since it doesn't support poll() based + * write flow control */ + if (e1i_ts->type == E1INP_TS_TYPE_TRAU) + return 0; + + e1i_ts->driver.misdn.fd.when |= BSC_FD_WRITE; + + return 0; +} + +static void timeout_ts1_write(void *data) +{ + struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data; + + /* trigger write of ts1, due to tx delay timer */ + ts_want_write(e1i_ts); +} + static int handle_ts1_write(struct bsc_fd *bfd) { struct e1inp_line *line = bfd->data; @@ -169,10 +197,12 @@ u_int8_t *l2_data; int ret; + bfd->when &= ~BSC_FD_WRITE; + /* get the next msg for this timeslot */ msg = e1inp_tx_ts(e1i_ts, &sign_link); if (!msg) { - bfd->when &= ~BSC_FD_WRITE; + /* no message after tx delay timer */ return 0; } @@ -182,8 +212,8 @@ hh = (struct mISDNhead *) msgb_push(msg, sizeof(*hh)); hh->prim = DL_DATA_REQ; - DEBUGP(DMI, "TX TEI(%d): %s\n", sign_link->tei, - hexdump(l2_data, msg->len - MISDN_HEADER_LEN)); + DEBUGP(DMI, "TX TEI(%d) SAPI(%d): %s\n", sign_link->tei, + sign_link->sapi, hexdump(l2_data, msg->len - MISDN_HEADER_LEN)); /* construct the sockaddr */ sa.family = AF_ISDN; @@ -193,10 +223,14 @@ ret = sendto(bfd->fd, msg->data, msg->len, 0, (struct sockaddr *)&sa, sizeof(sa)); + if (ret < 0) + fprintf(stderr, "sendto failed %d\n", ret); msgb_free(msg); - /* FIXME: this has to go */ - usleep(100000); + /* set tx delay timer for next event */ + e1i_ts->sign.tx_timer.cb = timeout_ts1_write; + e1i_ts->sign.tx_timer.data = e1i_ts; + schedule_timer(&e1i_ts->sign.tx_timer, 0, 50000); return ret; } @@ -253,8 +287,9 @@ msgb_put(msg, ret); - DEBUGP(DMIB, "<= BCHAN len = %d, prim(0x%x) id(0x%x): %s\n", - ret, hh->prim, hh->id, get_prim_name(hh->prim)); + if (hh->prim != PH_CONTROL_IND) + DEBUGP(DMIB, "<= BCHAN len = %d, prim(0x%x) id(0x%x): %s\n", + ret, hh->prim, hh->id, get_prim_name(hh->prim)); switch (hh->prim) { case PH_DATA_IND: @@ -332,28 +367,16 @@ return ret; } -static int ts_want_write(struct e1inp_ts *e1i_ts) -{ - /* We never include the mISDN B-Channel FD into the - * writeset, since it doesn't support poll() based - * write flow control */ - if (e1i_ts->type == E1INP_TS_TYPE_TRAU) - return 0; - - e1i_ts->driver.misdn.fd.when |= BSC_FD_WRITE; - - return 0; -} - struct e1inp_driver misdn_driver = { .name = "mISDNuser", .want_write = ts_want_write, }; -static int mi_e1_setup(struct e1inp_line *line) +static int mi_e1_setup(struct e1inp_line *line, int release_l2) { struct mi_e1_handle *e1h = line->driver_data; int ts, ret; + int clean = 1; /* TS0 is CRC4, don't need any fd for it */ for (ts = 1; ts < NUM_E1_TS; ts++) { @@ -384,8 +407,8 @@ } if (bfd->fd < 0) { - fprintf(stderr, "could not open socket %s\n", - strerror(errno)); + fprintf(stderr, "%s could not open socket %s\n", + __func__, strerror(errno)); return bfd->fd; } @@ -395,8 +418,6 @@ switch (e1i_ts->type) { case E1INP_TS_TYPE_SIGN: addr.channel = 0; - /* SAPI not supported yet in kernel */ - //addr.sapi = e1inp_ts->sign.sapi; addr.sapi = 0; addr.tei = GROUP_TEI; break; @@ -415,6 +436,13 @@ strerror(errno)); return -EIO; } + if (e1i_ts->type == E1INP_TS_TYPE_SIGN && release_l2) { + ret = ioctl(bfd->fd, IMCLEAR_L2, &clean); + if (ret < 0) { + fprintf(stderr, "could not send IOCTL IMCLEAN_L2 %s\n", strerror(errno)); + return -EIO; + } + } /* FIXME: only activate B-Channels once we start to * use them to conserve CPU power */ @@ -432,12 +460,14 @@ return 0; } -int mi_setup(int cardnr, struct e1inp_line *line) +int mi_setup(int cardnr, struct e1inp_line *line, int release_l2) { struct mi_e1_handle *e1h; int sk, ret, cnt; struct mISDN_devinfo devinfo; + init_af_isdn(); + /* register the driver with the core */ /* FIXME: do this in the plugin initializer function */ ret = e1inp_driver_register(&misdn_driver); @@ -457,7 +487,7 @@ /* open the ISDN card device */ sk = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE); if (sk < 0) { - fprintf(stderr, "could not open socket %s\n", strerror(errno)); + fprintf(stderr, "%s could not open socket %s\n", __func__, strerror(errno)); return sk; } @@ -484,9 +514,20 @@ fprintf(stdout, " protocol: %d\n", devinfo.protocol); fprintf(stdout, " nrbchan: %d\n", devinfo.nrbchan); fprintf(stdout, " name: %s\n", devinfo.name); +#else + printf("using device %d\n", e1h->cardnr); #endif - ret = mi_e1_setup(line); + if (!(devinfo.Dprotocols & (1 << ISDN_P_NT_E1))) { + fprintf(stderr, "error: card is not of type E1 (NT-mode)\n"); + return -EINVAL; + } + if (devinfo.nrbchan != 30) { + fprintf(stderr, "error: E1 card has no 30 B-channels\n"); + return -EINVAL; + } + + ret = mi_e1_setup(line, release_l2); if (ret) return ret; the subchanneling is reversed in my case. maybe we can use "#ifdef" until we know why this works for me and not in the reverse case: bit order "87654321" work, but "21436587" does not. here is my theory why this works for others: first i enabled second b-channel, so i expect that others have it disabled. because we use timeslot 1 of TRX for signalling, others can use just 3 timeslots on TRX for audio, and can make not more than one call at a time, because two slots are required for a call. in my case, i have the first call on time slot 3 and 4 (channel 2 and 3 on TRX). i did not debug why channel 1 is not selected for first call. if others use time slot 2 and 3 (channel 1 and 2 on TRX), it does not matter if the channel order is swapped, because slot 2 is swapped with slot 3, and both will not change their position. you will not notice the difference, until slots on different positions are used. diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/subchan_demux.c openbsc/src/subchan_demux.c --- openbsc.orig/src/subchan_demux.c 2009-02-23 17:58:34.000000000 +0100 +++ openbsc/src/subchan_demux.c 2009-04-19 13:30:08.000000000 +0200 @@ -100,7 +100,7 @@ if (!(dmx->chan_activ & (1 << c))) continue; - inbits = inbyte >> ((3-c)*2); + inbits = inbyte >> (c << 1); /* two bits for each subchannel */ if (inbits & 0x01) @@ -230,10 +230,10 @@ int rc; /* combine two bits of every subchan */ - rc = get_subch_bits(mx, 3, &bits[0], 2); - rc = get_subch_bits(mx, 2, &bits[2], 2); - rc = get_subch_bits(mx, 1, &bits[4], 2); - rc = get_subch_bits(mx, 0, &bits[6], 2); + rc = get_subch_bits(mx, 0, &bits[0], 2); + rc = get_subch_bits(mx, 1, &bits[2], 2); + rc = get_subch_bits(mx, 2, &bits[4], 2); + rc = get_subch_bits(mx, 3, &bits[6], 2); *byte = compact_bits(bits); finally the includes: diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/include/openbsc/e1_input.h openbsc/include/openbsc/e1_input.h --- openbsc.orig/include/openbsc/e1_input.h 2009-03-28 11:36:36.000000000 +0100 +++ openbsc/include/openbsc/e1_input.h 2009-04-19 12:46:37.000000000 +0200 @@ -63,7 +63,10 @@ union { struct { + /* list of all signalling links on this TS */ struct llist_head sign_links; + /* timer when to dequeue next frame */ + struct timer_list tx_timer; } sign; struct { /* subchannel demuxer for frames from E1 */ @@ -142,7 +145,7 @@ struct subch_mux *e1inp_get_mux(u_int8_t e1_nr, u_int8_t ts_nr); /* e1_config.c */ -int e1_config(struct gsm_bts *bts); +int e1_config(struct gsm_bts *bts, int card, int l2_release); int ia_config(struct gsm_bts *bts); int ipaccess_setup(struct e1inp_line *line); diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/include/openbsc/misdn.h openbsc/include/openbsc/misdn.h --- openbsc.orig/include/openbsc/misdn.h 2009-03-28 11:36:36.000000000 +0100 +++ openbsc/include/openbsc/misdn.h 2009-04-19 12:48:28.000000000 +0200 @@ -22,7 +22,7 @@ #include "e1_input.h" -int mi_setup(int cardnr, struct e1inp_line *line); +int mi_setup(int cardnr, struct e1inp_line *line, int l2_release); void mi_set_pcap_fd(int fd); int _abis_nm_sendmsg(struct msgb *msg); diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/bsc_hack.c openbsc/src/bsc_hack.c --- openbsc.orig/src/bsc_hack.c 2009-03-28 11:36:37.000000000 +0100 +++ openbsc/src/bsc_hack.c 2009-04-18 06:58:34.000000000 +0200 @@ -53,8 +53,11 @@ /* MCC and MNC for the Location Area Identifier */ static int MCC = 1; static int MNC = 1; +static int LAC = 1; static int ARFCN = HARDCODED_ARFCN; static enum gsm_bts_type BTS_TYPE = GSM_BTS_TYPE_BS11; +static int cardnr = 0; +static int release_l2 = 0; static const char *database_name = "hlr.sqlite3"; /* The following definitions are for OM and NM packets that we cannot yet @@ -901,7 +904,7 @@ gsmnet->name_long = "OpenBSC"; gsmnet->name_short = "OpenBSC"; bts = &gsmnet->bts[0]; - bts->location_area_code = 1; + bts->location_area_code = LAC; bts->trx[0].arfcn = ARFCN; /* Control Channel Description */ @@ -920,7 +923,7 @@ /* E1 mISDN input setup */ if (BTS_TYPE == GSM_BTS_TYPE_BS11) - return e1_config(bts); + return e1_config(bts, cardnr, release_l2); else return ia_config(bts); } @@ -952,14 +955,17 @@ printf(" Some useful help...\n"); printf(" -d option --debug=DRLL:DCC:DMM:DRR:DRSL:DNM enable debugging\n"); printf(" -s --disable-color\n"); - printf(" -n --network-code number(MNC) \n"); + printf(" -n --network-code number (MNC) \n"); printf(" -c --country-code number (MCC) \n"); + printf(" -L --location-area-code number (LAC) \n"); printf(" -f --arfcn number The frequency ARFCN\n"); printf(" -l --database db-name The database to use\n"); printf(" -a --authorize-everyone Allow everyone into the network.\n"); printf(" -r --reject-cause number The reject cause for LOCATION UPDATING REJECT.\n"); printf(" -p --pcap file The filename of the pcap file\n"); printf(" -t --bts-type type The BTS type (bs11, nanobts900, nanobts1800)\n"); + printf(" -C --cardnr number For bs11 select E1 card number other than 0\n"); + printf(" -R --release-l2 Releases mISDN layer 2 after exit, to unload driver.\n"); printf(" -h --help this text\n"); } @@ -973,16 +979,19 @@ {"disable-color", 0, 0, 's'}, {"network-code", 1, 0, 'n'}, {"country-code", 1, 0, 'c'}, + {"location-area-code", 1, 0, 'L'}, {"database", 1, 0, 'l'}, {"authorize-everyone", 0, 0, 'a'}, {"reject-cause", 1, 0, 'r'}, {"pcap", 1, 0, 'p'}, {"arfcn", 1, 0, 'f'}, {"bts-type", 1, 0, 't'}, + {"cardnr", 1, 0, 'C'}, + {"release-l2", 0, 0, 'R'}, {0, 0, 0, 0} }; - c = getopt_long(argc, argv, "hc:n:d:sar:p:f:t:", + c = getopt_long(argc, argv, "hc:n:d:sar:p:f:t:C:RL:", long_options, &option_index); if (c == -1) break; @@ -1004,6 +1013,9 @@ case 'c': MCC = atoi(optarg); break; + case 'L': + LAC = atoi(optarg); + break; case 'f': ARFCN = atoi(optarg); break; @@ -1022,6 +1034,12 @@ case 't': BTS_TYPE = parse_btstype(optarg); break; + case 'C': + cardnr = atoi(optarg); + break; + case 'R': + release_l2 = 1; + break; default: /* ignore */ break; diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/e1_config.c openbsc/src/e1_config.c --- openbsc.orig/src/e1_config.c 2009-03-28 11:36:37.000000000 +0100 +++ openbsc/src/e1_config.c 2009-04-19 13:24:20.000000000 +0200 @@ -15,7 +15,7 @@ #define TEI_RSL 1 /* do some compiled-in configuration for our BTS/E1 setup */ -int e1_config(struct gsm_bts *bts) +int e1_config(struct gsm_bts *bts, int cardnr, int l2_release) { struct e1inp_line *line; struct e1inp_ts *sign_ts; @@ -29,7 +29,7 @@ /* create E1 timeslots for signalling and TRAU frames */ e1inp_ts_config(&line->ts[1-1], line, E1INP_TS_TYPE_SIGN); e1inp_ts_config(&line->ts[2-1], line, E1INP_TS_TYPE_TRAU); - //e1inp_ts_config(&line->ts[3-1], line, E1INP_TS_TYPE_TRAU); + e1inp_ts_config(&line->ts[3-1], line, E1INP_TS_TYPE_TRAU); /* create signalling links for TS1 */ sign_ts = &line->ts[1-1]; @@ -47,13 +47,11 @@ subch_demux_activate(&line->ts[2-1].trau.demux, 2); subch_demux_activate(&line->ts[2-1].trau.demux, 3); -#if 0 /* enable subchannel demuxer on TS3 */ subch_demux_activate(&line->ts[3-1].trau.demux, 0); subch_demux_activate(&line->ts[3-1].trau.demux, 1); subch_demux_activate(&line->ts[3-1].trau.demux, 2); subch_demux_activate(&line->ts[3-1].trau.demux, 3); -#endif #ifdef HAVE_TRX1 /* create E1 timeslots for TRAU frames of TRX1 */ @@ -68,7 +66,7 @@ bts->trx[1].rsl_link = rsl_link; #endif - return mi_setup(0, line); + return mi_setup(cardnr, line, l2_release); } /* do some compiled-in configuration for our BTS/E1 setup */ diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/e1_input.c openbsc/src/e1_input.c --- openbsc.orig/src/e1_input.c 2009-03-28 11:36:37.000000000 +0100 +++ openbsc/src/e1_input.c 2009-04-19 13:20:00.000000000 +0200 @@ -31,12 +31,10 @@ #include <sys/socket.h> #include <sys/ioctl.h> #include <arpa/inet.h> -#include <mISDNif.h> +//#include <mISDNuser/mISDNif.h> -//#define AF_COMPATIBILITY_FUNC -//#include <compat_af_isdn.h> -#define AF_ISDN 34 -#define PF_ISDN AF_ISDN +//#define MISDN_OLD_AF_COMPATIBILITY +//#include <mISDNuser/compat_af_isdn.h> #include <openbsc/select.h> #include <openbsc/msgb.h> @@ -223,6 +221,7 @@ { struct e1inp_sign_link *sign_link; struct e1inp_driver *e1inp_driver; + struct e1inp_ts *e1i_ts; msg->l2h = msg->data; @@ -232,11 +231,16 @@ } sign_link = msg->trx->rsl_link; + e1i_ts = sign_link->ts; + + if (!timer_pending(&e1i_ts->sign.tx_timer)) { + /* notify the driver we have something to write */ + e1inp_driver = sign_link->ts->line->driver; + e1inp_driver->want_write(e1i_ts); + } + msgb_enqueue(&sign_link->tx_list, msg); - /* notify the driver we have something to write */ - e1inp_driver = sign_link->ts->line->driver; - e1inp_driver->want_write(sign_link->ts); return 0; } @@ -245,6 +249,7 @@ { struct e1inp_sign_link *sign_link; struct e1inp_driver *e1inp_driver; + struct e1inp_ts *e1i_ts; msg->l2h = msg->data; @@ -254,11 +259,15 @@ } sign_link = msg->trx->bts->oml_link; - msgb_enqueue(&sign_link->tx_list, msg); + e1i_ts = sign_link->ts; - /* notify the driver we have something to write */ - e1inp_driver = sign_link->ts->line->driver; - e1inp_driver->want_write(sign_link->ts); + if (!timer_pending(&e1i_ts->sign.tx_timer)) { + /* notify the driver we have something to write */ + e1inp_driver = sign_link->ts->line->driver; + e1inp_driver->want_write(e1i_ts); + } + + msgb_enqueue(&sign_link->tx_list, msg); return 0; } diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/input/misdn.c openbsc/src/input/misdn.c --- openbsc.orig/src/input/misdn.c 2009-03-28 11:36:36.000000000 +0100 +++ openbsc/src/input/misdn.c 2009-04-19 13:20:20.000000000 +0200 @@ -32,12 +32,11 @@ #include <sys/socket.h> #include <sys/ioctl.h> #include <arpa/inet.h> -#include <mISDNif.h> +#include <mISDNuser/mISDNif.h> -//#define AF_COMPATIBILITY_FUNC -//#include <compat_af_isdn.h> -#define AF_ISDN 34 -#define PF_ISDN AF_ISDN +#define MISDN_OLD_AF_COMPATIBILITY +#define AF_COMPATIBILITY_FUNC +#include <mISDNuser/compat_af_isdn.h> #include <openbsc/select.h> #include <openbsc/msgb.h> @@ -114,8 +113,10 @@ return ret; } - if (alen != sizeof(l2addr)) + if (alen != sizeof(l2addr)) { + fprintf(stderr, "error len\n"); return -EINVAL; + } msgb_put(msg, ret); @@ -129,7 +130,7 @@ case DL_INFORMATION_IND: /* mISDN tells us which channel number is allocated for this * tuple of (SAPI, TEI). */ - DEBUGP(DMI, "use channel(%d) sapi(%d) tei(%d) for now\n", + DEBUGP(DMI, "DL_INFORMATION_IND: channel(%d) sapi(%d) tei(%d)\n", l2addr.channel, l2addr.sapi, l2addr.tei); link = e1inp_lookup_sign_link(e1i_ts, l2addr.tei, l2addr.sapi); if (!link) { @@ -140,10 +141,16 @@ /* save the channel number in the driver private struct */ link->driver.misdn.channel = l2addr.channel; break; - case MPH_ACTIVATE_IND: +// case MPH_ACTIVATE_IND: + case DL_ESTABLISH_IND: + DEBUGP(DMI, "DL_ESTABLISH_IND: channel(%d) sapi(%d) tei(%d)\n", + l2addr.channel, l2addr.sapi, l2addr.tei); ret = e1inp_event(e1i_ts, EVT_E1_TEI_UP, l2addr.tei, l2addr.sapi); break; - case MPH_DEACTIVATE_IND: +// case MPH_DEACTIVATE_IND: + case DL_RELEASE_IND: + DEBUGP(DMI, "DL_RELEASE_IND: channel(%d) sapi(%d) tei(%d)\n", + l2addr.channel, l2addr.sapi, l2addr.tei); ret = e1inp_event(e1i_ts, EVT_E1_TEI_DN, l2addr.tei, l2addr.sapi); break; case DL_DATA_IND: @@ -157,6 +164,27 @@ return ret; } +static int ts_want_write(struct e1inp_ts *e1i_ts) +{ + /* We never include the mISDN B-Channel FD into the + * writeset, since it doesn't support poll() based + * write flow control */ + if (e1i_ts->type == E1INP_TS_TYPE_TRAU) + return 0; + + e1i_ts->driver.misdn.fd.when |= BSC_FD_WRITE; + + return 0; +} + +static void timeout_ts1_write(void *data) +{ + struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data; + + /* trigger write of ts1, due to tx delay timer */ + ts_want_write(e1i_ts); +} + static int handle_ts1_write(struct bsc_fd *bfd) { struct e1inp_line *line = bfd->data; @@ -169,10 +197,12 @@ u_int8_t *l2_data; int ret; + bfd->when &= ~BSC_FD_WRITE; + /* get the next msg for this timeslot */ msg = e1inp_tx_ts(e1i_ts, &sign_link); if (!msg) { - bfd->when &= ~BSC_FD_WRITE; + /* no message after tx delay timer */ return 0; } @@ -182,8 +212,8 @@ hh = (struct mISDNhead *) msgb_push(msg, sizeof(*hh)); hh->prim = DL_DATA_REQ; - DEBUGP(DMI, "TX TEI(%d): %s\n", sign_link->tei, - hexdump(l2_data, msg->len - MISDN_HEADER_LEN)); + DEBUGP(DMI, "TX TEI(%d) SAPI(%d): %s\n", sign_link->tei, + sign_link->sapi, hexdump(l2_data, msg->len - MISDN_HEADER_LEN)); /* construct the sockaddr */ sa.family = AF_ISDN; @@ -193,10 +223,14 @@ ret = sendto(bfd->fd, msg->data, msg->len, 0, (struct sockaddr *)&sa, sizeof(sa)); + if (ret < 0) + fprintf(stderr, "sendto failed %d\n", ret); msgb_free(msg); - /* FIXME: this has to go */ - usleep(100000); + /* set tx delay timer for next event */ + e1i_ts->sign.tx_timer.cb = timeout_ts1_write; + e1i_ts->sign.tx_timer.data = e1i_ts; + schedule_timer(&e1i_ts->sign.tx_timer, 0, 50000); return ret; } @@ -253,8 +287,9 @@ msgb_put(msg, ret); - DEBUGP(DMIB, "<= BCHAN len = %d, prim(0x%x) id(0x%x): %s\n", - ret, hh->prim, hh->id, get_prim_name(hh->prim)); + if (hh->prim != PH_CONTROL_IND) + DEBUGP(DMIB, "<= BCHAN len = %d, prim(0x%x) id(0x%x): %s\n", + ret, hh->prim, hh->id, get_prim_name(hh->prim)); switch (hh->prim) { case PH_DATA_IND: @@ -332,28 +367,16 @@ return ret; } -static int ts_want_write(struct e1inp_ts *e1i_ts) -{ - /* We never include the mISDN B-Channel FD into the - * writeset, since it doesn't support poll() based - * write flow control */ - if (e1i_ts->type == E1INP_TS_TYPE_TRAU) - return 0; - - e1i_ts->driver.misdn.fd.when |= BSC_FD_WRITE; - - return 0; -} - struct e1inp_driver misdn_driver = { .name = "mISDNuser", .want_write = ts_want_write, }; -static int mi_e1_setup(struct e1inp_line *line) +static int mi_e1_setup(struct e1inp_line *line, int release_l2) { struct mi_e1_handle *e1h = line->driver_data; int ts, ret; + int clean = 1; /* TS0 is CRC4, don't need any fd for it */ for (ts = 1; ts < NUM_E1_TS; ts++) { @@ -384,8 +407,8 @@ } if (bfd->fd < 0) { - fprintf(stderr, "could not open socket %s\n", - strerror(errno)); + fprintf(stderr, "%s could not open socket %s\n", + __func__, strerror(errno)); return bfd->fd; } @@ -395,8 +418,6 @@ switch (e1i_ts->type) { case E1INP_TS_TYPE_SIGN: addr.channel = 0; - /* SAPI not supported yet in kernel */ - //addr.sapi = e1inp_ts->sign.sapi; addr.sapi = 0; addr.tei = GROUP_TEI; break; @@ -415,6 +436,13 @@ strerror(errno)); return -EIO; } + if (e1i_ts->type == E1INP_TS_TYPE_SIGN && release_l2) { + ret = ioctl(bfd->fd, IMCLEAR_L2, &clean); + if (ret < 0) { + fprintf(stderr, "could not send IOCTL IMCLEAN_L2 %s\n", strerror(errno)); + return -EIO; + } + } /* FIXME: only activate B-Channels once we start to * use them to conserve CPU power */ @@ -432,12 +460,14 @@ return 0; } -int mi_setup(int cardnr, struct e1inp_line *line) +int mi_setup(int cardnr, struct e1inp_line *line, int release_l2) { struct mi_e1_handle *e1h; int sk, ret, cnt; struct mISDN_devinfo devinfo; + init_af_isdn(); + /* register the driver with the core */ /* FIXME: do this in the plugin initializer function */ ret = e1inp_driver_register(&misdn_driver); @@ -457,7 +487,7 @@ /* open the ISDN card device */ sk = socket(PF_ISDN, SOCK_RAW, ISDN_P_BASE); if (sk < 0) { - fprintf(stderr, "could not open socket %s\n", strerror(errno)); + fprintf(stderr, "%s could not open socket %s\n", __func__, strerror(errno)); return sk; } @@ -484,9 +514,20 @@ fprintf(stdout, " protocol: %d\n", devinfo.protocol); fprintf(stdout, " nrbchan: %d\n", devinfo.nrbchan); fprintf(stdout, " name: %s\n", devinfo.name); +#else + printf("using device %d\n", e1h->cardnr); #endif - ret = mi_e1_setup(line); + if (!(devinfo.Dprotocols & (1 << ISDN_P_NT_E1))) { + fprintf(stderr, "error: card is not of type E1 (NT-mode)\n"); + return -EINVAL; + } + if (devinfo.nrbchan != 30) { + fprintf(stderr, "error: E1 card has no 30 B-channels\n"); + return -EINVAL; + } + + ret = mi_e1_setup(line, release_l2); if (ret) return ret; diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/src/subchan_demux.c openbsc/src/subchan_demux.c --- openbsc.orig/src/subchan_demux.c 2009-02-23 17:58:34.000000000 +0100 +++ openbsc/src/subchan_demux.c 2009-04-19 13:30:08.000000000 +0200 @@ -100,7 +100,7 @@ if (!(dmx->chan_activ & (1 << c))) continue; - inbits = inbyte >> ((3-c)*2); + inbits = inbyte >> (c << 1); /* two bits for each subchannel */ if (inbits & 0x01) @@ -230,10 +230,10 @@ int rc; /* combine two bits of every subchan */ - rc = get_subch_bits(mx, 3, &bits[0], 2); - rc = get_subch_bits(mx, 2, &bits[2], 2); - rc = get_subch_bits(mx, 1, &bits[4], 2); - rc = get_subch_bits(mx, 0, &bits[6], 2); + rc = get_subch_bits(mx, 0, &bits[0], 2); + rc = get_subch_bits(mx, 1, &bits[2], 2); + rc = get_subch_bits(mx, 2, &bits[4], 2); + rc = get_subch_bits(mx, 3, &bits[6], 2); *byte = compact_bits(bits); diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/include/openbsc/e1_input.h openbsc/include/openbsc/e1_input.h --- openbsc.orig/include/openbsc/e1_input.h 2009-03-28 11:36:36.000000000 +0100 +++ openbsc/include/openbsc/e1_input.h 2009-04-19 12:46:37.000000000 +0200 @@ -63,7 +63,10 @@ union { struct { + /* list of all signalling links on this TS */ struct llist_head sign_links; + /* timer when to dequeue next frame */ + struct timer_list tx_timer; } sign; struct { /* subchannel demuxer for frames from E1 */ @@ -142,7 +145,7 @@ struct subch_mux *e1inp_get_mux(u_int8_t e1_nr, u_int8_t ts_nr); /* e1_config.c */ -int e1_config(struct gsm_bts *bts); +int e1_config(struct gsm_bts *bts, int card, int l2_release); int ia_config(struct gsm_bts *bts); int ipaccess_setup(struct e1inp_line *line); diff -Nur -x '*.Po' -x 'Makefile*' -x '*~' -x '*rej' -x '*.o' openbsc.orig/include/openbsc/misdn.h openbsc/include/openbsc/misdn.h --- openbsc.orig/include/openbsc/misdn.h 2009-03-28 11:36:36.000000000 +0100 +++ openbsc/include/openbsc/misdn.h 2009-04-19 12:48:28.000000000 +0200 @@ -22,7 +22,7 @@ #include "e1_input.h" -int mi_setup(int cardnr, struct e1inp_line *line); +int mi_setup(int cardnr, struct e1inp_line *line, int l2_release); void mi_set_pcap_fd(int fd); int _abis_nm_sendmsg(struct msgb *msg);

1 0

Re: LMT cable pinout
by Dieter Spaar 17 Apr '09

17 Apr '09

Hello Matthias, On Fri, 17 Apr 2009 11:44:06 +0200, "Matthias Wenzel" <bs11(a)mazzoo.de> wrote: > > can someone post the pinout of the rs232 LMT cable - db9 on one end, and > the 8pin header on the bs11 on the other side. If you look at the BS-11 interface (Antenne connectors top), its the upper 8-pin connector: The four E1 BNC connectors are above here. (Rx) x x x x (right pin: Gnd) (Tx) x x x x (right pin: +5V) | + LMT You just need a three wire connection (Gnd, Rx, Tx). Tx/Rx is from the BS-11 side, so Tx (the lower pin) has to be connected to Rx of the PC. The levels are standard RS-232 level, to be sure just measure the Tx pin, it has a high voltage (ca. +/- 9 Volt). And if someone want to play with the other ports, here is how they are connected: The four E1 BNC connectors are above here. (Rx) x x x x (right pin: Gnd) (Tx) x x x x (right pin: +5V) 1 2 3 1: ? 2: LMT 3: (no COM Port, dont't connect to RS232) (Rx) x x x x (right pin: Gnd) (Tx) x x x x (right pin: +5V) 1 2 3 1: TRX0 L1LAPDmProc 2: TRX0 L3Proc (pwd: L3Proc) 3: TRX0 OEM_Proc (pwd: LAPDOM) (Rx) x x x x (right pin: Gnd) (Tx) x x x x (right pin: +5V) 1 2 3 1: TRX1 L1LAPDmProc 2: TRX1 L3Proc (pwd: L3Proc) 3: TRX1 OEM_Proc (pwd: LAPDOM) When you boot, and the firmware is not yet loaded, you get a prompt and can see a menu. There is a password protected menu, the password is above ("pwd:"). The baud rate is 9600 8n1 (except LMT: 19200 8n1). When the firmware is loaded those menus are no longer there (they are commands in the boot ROM), however if you type "qwertyuiop" (without the quotes, there is no echo) you can enter debug commands in the firmware. Some menus ask for a password, however its empty (just hit return). I have not found really usefull things, but if someone wants to play, feel free to do so and of course post the results if you find something usefull. Disclaimer: Nothing of the above comes from the NDA documentation, its not even mentioned there. All of the above was discovered by having a close look. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

1 0

Re: AW: BS-11 PLL clock source / calibration
by Dieter Spaar 17 Apr '09

17 Apr '09

Hello Andreas, On Fri, 17 Apr 2009 12:45:50 +0200, "Andreas.Eversberg" <Andreas.Eversberg(a)versatel.de> wrote: > if you need clock signals, you can use the C4IO clock line of the ISDN > cards. they clock 4096khz. you can use them to transfer clock from one > card to another or to mesure the clock. the E1 card has this clock on > one pin of the PCM connector. (see data sheet) the C4IO is also > available on the HFC-PCI single port card. with an oscilloscope you can > compare. > > in order to retieve the clock from E1 interface in NT-mode, you need to: > > modprobe hfcmulti port=0x200 debug=0x40000 > > watch the dmesg about init process of controller. this will override the > default behavior: provide clock to the NT interface. > > i would suggest to use a resistor of 1K to protect the e1 card. the > signal must not look good, we just need the shift of both signals. Thanks for this tip. I already though about the E1 clock, but its below the 10 MHz limit of the HP8922. I think I have to build a simple frequency counter (I don't have one) and use the reference clock of the HP8922. BTW, there is also a GSM frame pulse available at one of the connectors (one of the J01 pins, I have to look it up). OK, maybe a simple frequency counter is a good reason to finally do something usefull with my FPGA boards ;-) Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

1 0

Re: AW: BS-11 PLL clock source / calibration
by Dieter Spaar 17 Apr '09

17 Apr '09

Hello Andreas, On Fri, 17 Apr 2009 12:05:16 +0200, "Andreas.Eversberg" <Andreas.Eversberg(a)versatel.de> wrote: > i tested external clock from isdn line yesterday. modern phones, like > the i-phone will not register to the base station. (tested it yesterday > together with other phones). no packet is received by openbsc. so i set > the clock to "locked" and retrieved the clock from my isdn line (layer 1 > up). it did not help at all. the phone found the base station id while > scanning for networks, but the registration did not work. > > is it possible that the provisioning (during startup) is faulty? If I remeber, several iPhones registered to the BS-11 during 25C3. So it should work (however I cannot test it here, but feel free to send my an iPhone for playing ;-) Do you see the test network with the iPhone or does the registration not work ? Have you tried to use the SIM card from a phone which has already registered to the test network ? This way the iPhone would look at the BS-11 first before trying to search for other netwoks. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

1 0

AW: BS-11 PLL clock source / calibration
by Andreas.Eversberg 17 Apr '09

17 Apr '09

just find pin 118 of the E1 controller on the pcm bus (connector) and compare the clock (4096khz) with pin 54 on the HFC-S PCI ISDN controller. use an oscilloscope and sync it to ISDN interface. one pin higher (on both controllers) you will find 8khz frame clock signal. if the clock differs by 1ppm, the phase of both signals cycles about four times a second. for rough calibration, i would suggest the 8khz signal. it will take 125 seconds for a full phase shift at 1ppm clock skew. -----Ursprüngliche Nachricht----- Von: Dieter Spaar [mailto:spaar@mirider.augusta.de] Gesendet: Freitag, 17. April 2009 15:03 An: Andreas.Eversberg Cc: openbsc(a)lists.gnumonks.org Betreff: Re: AW: BS-11 PLL clock source / calibration Hello Andreas, On Fri, 17 Apr 2009 12:45:50 +0200, "Andreas.Eversberg" <Andreas.Eversberg(a)versatel.de> wrote: > if you need clock signals, you can use the C4IO clock line of the ISDN > cards. they clock 4096khz. you can use them to transfer clock from one > card to another or to mesure the clock. the E1 card has this clock on > one pin of the PCM connector. (see data sheet) the C4IO is also > available on the HFC-PCI single port card. with an oscilloscope you can > compare. > > in order to retieve the clock from E1 interface in NT-mode, you need to: > > modprobe hfcmulti port=0x200 debug=0x40000 > > watch the dmesg about init process of controller. this will override the > default behavior: provide clock to the NT interface. > > i would suggest to use a resistor of 1K to protect the e1 card. the > signal must not look good, we just need the shift of both signals. Thanks for this tip. I already though about the E1 clock, but its below the 10 MHz limit of the HP8922. I think I have to build a simple frequency counter (I don't have one) and use the reference clock of the HP8922. BTW, there is also a GSM frame pulse available at one of the connectors (one of the J01 pins, I have to look it up). OK, maybe a simple frequency counter is a good reason to finally do something usefull with my FPGA boards ;-) Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

1 0

AW: AW: BS-11 PLL clock source / calibration
by Andreas.Eversberg 17 Apr '09

17 Apr '09

the registration did not work, the network was found. i did not test the sim card. i will do this in the future. -----Ursprüngliche Nachricht----- Von: Dieter Spaar [mailto:spaar@mirider.augusta.de] Gesendet: Freitag, 17. April 2009 14:54 An: Andreas.Eversberg Cc: openbsc(a)lists.gnumonks.org Betreff: Re: AW: BS-11 PLL clock source / calibration Hello Andreas, On Fri, 17 Apr 2009 12:05:16 +0200, "Andreas.Eversberg" <Andreas.Eversberg(a)versatel.de> wrote: > i tested external clock from isdn line yesterday. modern phones, like > the i-phone will not register to the base station. (tested it yesterday > together with other phones). no packet is received by openbsc. so i set > the clock to "locked" and retrieved the clock from my isdn line (layer 1 > up). it did not help at all. the phone found the base station id while > scanning for networks, but the registration did not work. > > is it possible that the provisioning (during startup) is faulty? If I remeber, several iPhones registered to the BS-11 during 25C3. So it should work (however I cannot test it here, but feel free to send my an iPhone for playing ;-) Do you see the test network with the iPhone or does the registration not work ? Have you tried to use the SIM card from a phone which has already registered to the test network ? This way the iPhone would look at the BS-11 first before trying to search for other netwoks. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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AW: BS-11 PLL clock source / calibration
by Andreas.Eversberg 17 Apr '09

17 Apr '09

if you need clock signals, you can use the C4IO clock line of the ISDN cards. they clock 4096khz. you can use them to transfer clock from one card to another or to mesure the clock. the E1 card has this clock on one pin of the PCM connector. (see data sheet) the C4IO is also available on the HFC-PCI single port card. with an oscilloscope you can compare. in order to retieve the clock from E1 interface in NT-mode, you need to: modprobe hfcmulti port=0x200 debug=0x40000 watch the dmesg about init process of controller. this will override the default behavior: provide clock to the NT interface. i would suggest to use a resistor of 1K to protect the e1 card. the signal must not look good, we just need the shift of both signals. -----Ursprüngliche Nachricht----- Von: openbsc-bounces(a)lists.gnumonks.org [mailto:openbsc-bounces@lists.gnumonks.org] Im Auftrag von Dieter Spaar Gesendet: Freitag, 17. April 2009 14:25 An: Harald Welte Cc: openbsc(a)lists.gnumonks.org Betreff: Re: BS-11 PLL clock source / calibration Hello Harald, On Fri, 17 Apr 2009 10:17:13 +0200, "Harald Welte" <laforge(a)gnumonks.org> wrote: > > Dieter, what I just found out is that the LI object has a user-configurable > setting, where we can force it to be stand alone or locked to the E1. You mean the "PLL synchonisation mode" attribute which is set to "locked mode" ? I am not sure if we can change it for our version of the BS-11. As far as I understand the documentation, this is a setting which is only available with the CCU ("Combo Card Unit", the universal interface which also allows to use a standard ISDN line). The documentation mentions at one place that for the CCU variant they use an oven controlled oscillator which fulfilles the GSM clock stability requirements even without being snchronized to the E1 line. But we should of course try it. > We could add this setting to the bs11_config program so people can try > if their E1 clock or their [10 years uncalibrated] BS11 internal oscillator > is better. > > What do you think? Yes, why not try it. Probably the result is similar to disabling the master clock of the HFC-E1 card, this way the BS-11 clock determines the E1 clock (the HFC-E1 card synchronizes to the trasmitter E1 clock of the BS-11 and the BS-11 locks to the transmitter clock of the HFC-E1 which is determined by the BS-11). Surely the cleaner way is to adjust the clock setting in the BS-11 (if this settings works for our BS-11 variant). > I'm quite sure there must be an option to do this externally. The internal > oscillator must be calibrated every two years, and I'm sure they do this > without opening the case (in the field...) Its possible to calibrate the PLL without opening the case. The attribute is protected by some checksum, I have not looked at the details. And "officially" out LMT version should not even allow to see the calibration dialog ;-) The problem for me is how to measure the clock without opening the case. I can measure an unmodulated carrier very accurate if it is within the 10 MHz to 1 GHz range (the HP 8922 is accurate enough to do this). However I don't have the equippment to measure the modulated and pulsed signal of the BS-11. Maybe there is some hidden setting to send just the unmodulated carrier, but I have not yet found anything in this direction. Another problem is that changing the calibration requires a restart of the BS-11 (at least I only saw any effect when I restarted). Additionally when you query the calibration, you get the "PLL Set Value" and the "PLL Work Value", the "Set Value" seems to be used when starting up and the "Work Value" changes, most certainly locking to an external clock also influences it. I did not find anything in the documentation, actually those settings are not indended for the end user, just the factory. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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AW: BS-11 PLL clock source / calibration
by Andreas.Eversberg 17 Apr '09

17 Apr '09

i tested external clock from isdn line yesterday. modern phones, like the i-phone will not register to the base station. (tested it yesterday together with other phones). no packet is received by openbsc. so i set the clock to "locked" and retrieved the clock from my isdn line (layer 1 up). it did not help at all. the phone found the base station id while scanning for networks, but the registration did not work. is it possible that the provisioning (during startup) is faulty? -----Ursprüngliche Nachricht----- Von: openbsc-bounces(a)lists.gnumonks.org [mailto:openbsc-bounces@lists.gnumonks.org] Im Auftrag von Harald Welte Gesendet: Freitag, 17. April 2009 10:17 An: Dieter Spaar Cc: openbsc(a)lists.gnumonks.org Betreff: BS-11 PLL clock source / calibration On Wed, Apr 08, 2009 at 07:44:02PM +0200, Dieter Spaar wrote: > The BS-11 takes the clock from the E1 line as reference. So you somehow > have to make sure that this clock is stable and accurate. If you don't > use another ISDN line, you have to generate a stable and accurate clock > for the E1 card yourself. Dieter, what I just found out is that the LI object has a user-configurable setting, where we can force it to be stand alone or locked to the E1. We could add this setting to the bs11_config program so people can try if their E1 clock or their [10 years uncalibrated] BS11 internal oscillator is better. What do you think? > Another approach might be to calibrate the BS-11 internal oscillator, > this can be done by software. However it is not yet sure if this will > solve the problem in a reliable way, also I have not yet found a way > to measure the BS-11 clock without opening the case. I'm quite sure there must be an option to do this externally. The internal oscillator must be calibrated every two years, and I'm sure they do this without opening the case (in the field...) Regards, -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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LMT cable pinout
by Matthias Wenzel 17 Apr '09

17 Apr '09

Hi, can someone post the pinout of the rs232 LMT cable - db9 on one end, and the 8pin header on the bs11 on the other side. the wiki doesn't have the information (yet). http://bs11-abis.gnumonks.org/trac/attachment/wiki/BS11_Package_List/bs11_l… http://bs11-abis.gnumonks.org/trac/attachment/wiki/BS11_Configuration/bs11_… thanks in advance - the cable either didn't get shipped to our lab or went the way all hardware goes... matthias

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