Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 1 | /* OpenBSC Abis input driver for DAHDI */ |
| 2 | |
| 3 | /* (C) 2008-2011 by Harald Welte <laforge@gnumonks.org> |
| 4 | * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org> |
| 5 | * (C) 2010 by Digium and Matthew Fredrickson <creslin@digium.com> |
| 6 | * |
| 7 | * All Rights Reserved |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 22 | * |
| 23 | */ |
| 24 | |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 25 | #include <stdio.h> |
| 26 | #include <unistd.h> |
| 27 | #include <stdlib.h> |
| 28 | #include <errno.h> |
| 29 | #include <string.h> |
| 30 | #include <time.h> |
| 31 | #include <sys/fcntl.h> |
| 32 | #include <sys/socket.h> |
| 33 | #include <sys/ioctl.h> |
| 34 | #include <arpa/inet.h> |
| 35 | #include <dahdi/user.h> |
| 36 | |
| 37 | #include <osmocom/core/select.h> |
| 38 | #include <osmocom/core/msgb.h> |
Pablo Neira Ayuso | 0b9ed9a | 2011-07-02 17:25:19 +0200 | [diff] [blame] | 39 | #include <osmocom/core/logging.h> |
Pablo Neira Ayuso | a20762a | 2011-07-02 19:01:58 +0200 | [diff] [blame] | 40 | #include <osmocom/core/signal.h> |
Harald Welte | 95e5dec | 2011-08-16 14:41:32 +0200 | [diff] [blame] | 41 | #include <osmocom/core/rate_ctr.h> |
Pablo Neira Ayuso | 0b9ed9a | 2011-07-02 17:25:19 +0200 | [diff] [blame] | 42 | #include <osmocom/abis/subchan_demux.h> |
| 43 | #include <osmocom/abis/e1_input.h> |
Harald Welte | 71d87b2 | 2011-07-18 14:49:56 +0200 | [diff] [blame] | 44 | #include <osmocom/core/talloc.h> |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 45 | |
Pablo Neira Ayuso | 355ce69 | 2011-07-05 14:53:37 +0200 | [diff] [blame] | 46 | #include <osmocom/abis/lapd.h> |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 47 | |
| 48 | #define TS1_ALLOC_SIZE 300 |
| 49 | |
| 50 | /* Corresponds to dahdi/user.h, only PRI related events */ |
| 51 | static const struct value_string dahdi_evt_names[] = { |
| 52 | { DAHDI_EVENT_NONE, "NONE" }, |
| 53 | { DAHDI_EVENT_ALARM, "ALARM" }, |
| 54 | { DAHDI_EVENT_NOALARM, "NOALARM" }, |
| 55 | { DAHDI_EVENT_ABORT, "HDLC ABORT" }, |
| 56 | { DAHDI_EVENT_OVERRUN, "HDLC OVERRUN" }, |
| 57 | { DAHDI_EVENT_BADFCS, "HDLC BAD FCS" }, |
| 58 | { DAHDI_EVENT_REMOVED, "REMOVED" }, |
| 59 | { 0, NULL } |
| 60 | }; |
| 61 | |
| 62 | static void handle_dahdi_exception(struct e1inp_ts *ts) |
| 63 | { |
| 64 | int rc, evt; |
Harald Welte | 95e5dec | 2011-08-16 14:41:32 +0200 | [diff] [blame] | 65 | struct e1inp_line *line = ts->line; |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 66 | struct input_signal_data isd; |
| 67 | |
| 68 | rc = ioctl(ts->driver.dahdi.fd.fd, DAHDI_GETEVENT, &evt); |
| 69 | if (rc < 0) |
| 70 | return; |
| 71 | |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 72 | LOGP(DLMI, LOGL_NOTICE, "Line %u(%s) / TS %u DAHDI EVENT %s\n", |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 73 | ts->line->num, ts->line->name, ts->num, |
| 74 | get_value_string(dahdi_evt_names, evt)); |
| 75 | |
| 76 | isd.line = ts->line; |
| 77 | |
| 78 | switch (evt) { |
| 79 | case DAHDI_EVENT_ALARM: |
| 80 | /* we should notify the code that the line is gone */ |
Pablo Neira Ayuso | de66891 | 2011-08-16 17:26:23 +0200 | [diff] [blame] | 81 | osmo_signal_dispatch(SS_L_INPUT, S_L_INP_LINE_ALARM, &isd); |
Harald Welte | 95e5dec | 2011-08-16 14:41:32 +0200 | [diff] [blame] | 82 | rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_ALARM]); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 83 | break; |
| 84 | case DAHDI_EVENT_NOALARM: |
| 85 | /* alarm has gone, we should re-start the SABM requests */ |
Pablo Neira Ayuso | de66891 | 2011-08-16 17:26:23 +0200 | [diff] [blame] | 86 | osmo_signal_dispatch(SS_L_INPUT, S_L_INP_LINE_NOALARM, &isd); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 87 | break; |
Harald Welte | 95e5dec | 2011-08-16 14:41:32 +0200 | [diff] [blame] | 88 | case DAHDI_EVENT_ABORT: |
| 89 | rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_HDLC_ABORT]); |
| 90 | break; |
| 91 | case DAHDI_EVENT_OVERRUN: |
| 92 | rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_HDLC_OVERR]); |
| 93 | break; |
| 94 | case DAHDI_EVENT_BADFCS: |
| 95 | rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_HDLC_BADFCS]); |
| 96 | break; |
| 97 | case DAHDI_EVENT_REMOVED: |
| 98 | rate_ctr_inc(&line->rate_ctr->ctr[E1I_CTR_REMOVED]); |
| 99 | break; |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 100 | } |
| 101 | } |
| 102 | |
| 103 | static int handle_ts1_read(struct osmo_fd *bfd) |
| 104 | { |
| 105 | struct e1inp_line *line = bfd->data; |
| 106 | unsigned int ts_nr = bfd->priv_nr; |
| 107 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 108 | struct msgb *msg = msgb_alloc(TS1_ALLOC_SIZE, "DAHDI TS1"); |
| 109 | lapd_mph_type prim; |
| 110 | unsigned int sapi, tei; |
Pablo Neira Ayuso | 31fe5f2 | 2011-08-09 23:15:38 +0200 | [diff] [blame] | 111 | int ilen, ret, error = 0; |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 112 | uint8_t *idata; |
| 113 | |
| 114 | if (!msg) |
| 115 | return -ENOMEM; |
| 116 | |
| 117 | ret = read(bfd->fd, msg->data, TS1_ALLOC_SIZE - 16); |
| 118 | if (ret == -1) |
| 119 | handle_dahdi_exception(e1i_ts); |
| 120 | else if (ret < 0) { |
| 121 | perror("read "); |
| 122 | } |
| 123 | msgb_put(msg, ret - 2); |
| 124 | if (ret <= 3) { |
| 125 | perror("read "); |
| 126 | } |
| 127 | |
| 128 | sapi = msg->data[0] >> 2; |
| 129 | tei = msg->data[1] >> 1; |
| 130 | |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 131 | DEBUGP(DLMI, "<= len = %d, sapi(%d) tei(%d)", ret, sapi, tei); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 132 | |
Pablo Neira Ayuso | 31fe5f2 | 2011-08-09 23:15:38 +0200 | [diff] [blame] | 133 | idata = lapd_receive(e1i_ts->driver.dahdi.lapd, msg->data, msg->len, &ilen, &prim, &error); |
| 134 | if (!idata) { |
| 135 | switch(error) { |
| 136 | case LAPD_ERR_UNKNOWN_TEI: |
| 137 | /* We don't know about this TEI, probably the BSC |
| 138 | * lost local states (it crashed or it was stopped), |
| 139 | * notify the driver to see if it can do anything to |
| 140 | * recover the existing signalling links with the BTS. |
| 141 | */ |
Pablo Neira Ayuso | de66891 | 2011-08-16 17:26:23 +0200 | [diff] [blame] | 142 | e1inp_event(e1i_ts, S_L_INP_TEI_UNKNOWN, tei, sapi); |
Pablo Neira Ayuso | 31fe5f2 | 2011-08-09 23:15:38 +0200 | [diff] [blame] | 143 | return -EIO; |
| 144 | } |
| 145 | if (prim == 0) |
| 146 | return -EIO; |
| 147 | } |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 148 | |
| 149 | msgb_pull(msg, 2); |
| 150 | |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 151 | DEBUGP(DLMI, "prim %08x\n", prim); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 152 | |
| 153 | switch (prim) { |
| 154 | case 0: |
| 155 | break; |
| 156 | case LAPD_MPH_ACTIVATE_IND: |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 157 | DEBUGP(DLMI, "MPH_ACTIVATE_IND: sapi(%d) tei(%d)\n", sapi, tei); |
Pablo Neira Ayuso | de66891 | 2011-08-16 17:26:23 +0200 | [diff] [blame] | 158 | ret = e1inp_event(e1i_ts, S_L_INP_TEI_UP, tei, sapi); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 159 | break; |
| 160 | case LAPD_MPH_DEACTIVATE_IND: |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 161 | DEBUGP(DLMI, "MPH_DEACTIVATE_IND: sapi(%d) tei(%d)\n", sapi, tei); |
Pablo Neira Ayuso | de66891 | 2011-08-16 17:26:23 +0200 | [diff] [blame] | 162 | ret = e1inp_event(e1i_ts, S_L_INP_TEI_DN, tei, sapi); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 163 | break; |
| 164 | case LAPD_DL_DATA_IND: |
| 165 | case LAPD_DL_UNITDATA_IND: |
| 166 | if (prim == LAPD_DL_DATA_IND) |
| 167 | msg->l2h = msg->data + 2; |
| 168 | else |
| 169 | msg->l2h = msg->data + 1; |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 170 | DEBUGP(DLMI, "RX: %s\n", osmo_hexdump(msgb_l2(msg), ret)); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 171 | ret = e1inp_rx_ts(e1i_ts, msg, tei, sapi); |
| 172 | break; |
| 173 | default: |
Pablo Neira Ayuso | 0b9ed9a | 2011-07-02 17:25:19 +0200 | [diff] [blame] | 174 | printf("ERROR: unknown prim\n"); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 175 | break; |
| 176 | } |
| 177 | |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 178 | DEBUGP(DLMI, "Returned ok\n"); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 179 | return ret; |
| 180 | } |
| 181 | |
| 182 | static int ts_want_write(struct e1inp_ts *e1i_ts) |
| 183 | { |
| 184 | /* We never include the DAHDI B-Channel FD into the |
| 185 | * writeset, since it doesn't support poll() based |
| 186 | * write flow control */ |
| 187 | if (e1i_ts->type == E1INP_TS_TYPE_TRAU) { |
| 188 | fprintf(stderr, "Trying to write TRAU ts\n"); |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | e1i_ts->driver.dahdi.fd.when |= BSC_FD_WRITE; |
| 193 | |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | static void timeout_ts1_write(void *data) |
| 198 | { |
| 199 | struct e1inp_ts *e1i_ts = (struct e1inp_ts *)data; |
| 200 | |
| 201 | /* trigger write of ts1, due to tx delay timer */ |
| 202 | ts_want_write(e1i_ts); |
| 203 | } |
| 204 | |
| 205 | static void dahdi_write_msg(uint8_t *data, int len, void *cbdata) |
| 206 | { |
| 207 | struct osmo_fd *bfd = cbdata; |
| 208 | struct e1inp_line *line = bfd->data; |
| 209 | unsigned int ts_nr = bfd->priv_nr; |
| 210 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 211 | int ret; |
| 212 | |
| 213 | ret = write(bfd->fd, data, len + 2); |
| 214 | if (ret == -1) |
| 215 | handle_dahdi_exception(e1i_ts); |
| 216 | else if (ret < 0) |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 217 | LOGP(DLMI, LOGL_NOTICE, "%s write failed %d\n", __func__, ret); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | static int handle_ts1_write(struct osmo_fd *bfd) |
| 221 | { |
| 222 | struct e1inp_line *line = bfd->data; |
| 223 | unsigned int ts_nr = bfd->priv_nr; |
| 224 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 225 | struct e1inp_sign_link *sign_link; |
| 226 | struct msgb *msg; |
| 227 | |
| 228 | bfd->when &= ~BSC_FD_WRITE; |
| 229 | |
| 230 | /* get the next msg for this timeslot */ |
| 231 | msg = e1inp_tx_ts(e1i_ts, &sign_link); |
| 232 | if (!msg) { |
| 233 | /* no message after tx delay timer */ |
| 234 | return 0; |
| 235 | } |
| 236 | |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 237 | DEBUGP(DLMI, "TX: %s\n", osmo_hexdump(msg->data, msg->len)); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 238 | lapd_transmit(e1i_ts->driver.dahdi.lapd, sign_link->tei, |
| 239 | sign_link->sapi, msg->data, msg->len); |
| 240 | msgb_free(msg); |
| 241 | |
| 242 | /* set tx delay timer for next event */ |
| 243 | e1i_ts->sign.tx_timer.cb = timeout_ts1_write; |
| 244 | e1i_ts->sign.tx_timer.data = e1i_ts; |
| 245 | osmo_timer_schedule(&e1i_ts->sign.tx_timer, 0, 50000); |
| 246 | |
| 247 | return 0; |
| 248 | } |
| 249 | |
| 250 | |
| 251 | static int invertbits = 1; |
| 252 | |
| 253 | static uint8_t flip_table[256]; |
| 254 | |
| 255 | static void init_flip_bits(void) |
| 256 | { |
| 257 | int i,k; |
| 258 | |
| 259 | for (i = 0 ; i < 256 ; i++) { |
| 260 | uint8_t sample = 0 ; |
| 261 | for (k = 0; k<8; k++) { |
| 262 | if ( i & 1 << k ) sample |= 0x80 >> k; |
| 263 | } |
| 264 | flip_table[i] = sample; |
| 265 | } |
| 266 | } |
| 267 | |
| 268 | static uint8_t * flip_buf_bits ( uint8_t * buf , int len) |
| 269 | { |
| 270 | int i; |
| 271 | uint8_t * start = buf; |
| 272 | |
| 273 | for (i = 0 ; i < len; i++) { |
| 274 | buf[i] = flip_table[(uint8_t)buf[i]]; |
| 275 | } |
| 276 | |
| 277 | return start; |
| 278 | } |
| 279 | |
| 280 | #define D_BCHAN_TX_GRAN 160 |
| 281 | /* write to a B channel TS */ |
| 282 | static int handle_tsX_write(struct osmo_fd *bfd) |
| 283 | { |
| 284 | struct e1inp_line *line = bfd->data; |
| 285 | unsigned int ts_nr = bfd->priv_nr; |
| 286 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 287 | uint8_t tx_buf[D_BCHAN_TX_GRAN]; |
| 288 | struct subch_mux *mx = &e1i_ts->trau.mux; |
| 289 | int ret; |
| 290 | |
| 291 | ret = subchan_mux_out(mx, tx_buf, D_BCHAN_TX_GRAN); |
| 292 | |
| 293 | if (ret != D_BCHAN_TX_GRAN) { |
| 294 | fprintf(stderr, "Huh, got ret of %d\n", ret); |
| 295 | if (ret < 0) |
| 296 | return ret; |
| 297 | } |
| 298 | |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 299 | DEBUGP(DLMIB, "BCHAN TX: %s\n", |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 300 | osmo_hexdump(tx_buf, D_BCHAN_TX_GRAN)); |
| 301 | |
| 302 | if (invertbits) { |
| 303 | flip_buf_bits(tx_buf, ret); |
| 304 | } |
| 305 | |
| 306 | ret = write(bfd->fd, tx_buf, ret); |
| 307 | if (ret < D_BCHAN_TX_GRAN) |
| 308 | fprintf(stderr, "send returns %d instead of %d\n", ret, |
| 309 | D_BCHAN_TX_GRAN); |
| 310 | |
| 311 | return ret; |
| 312 | } |
| 313 | |
| 314 | #define D_TSX_ALLOC_SIZE (D_BCHAN_TX_GRAN) |
| 315 | /* FIXME: read from a B channel TS */ |
| 316 | static int handle_tsX_read(struct osmo_fd *bfd) |
| 317 | { |
| 318 | struct e1inp_line *line = bfd->data; |
| 319 | unsigned int ts_nr = bfd->priv_nr; |
| 320 | struct e1inp_ts *e1i_ts = &line->ts[ts_nr-1]; |
| 321 | struct msgb *msg = msgb_alloc(D_TSX_ALLOC_SIZE, "DAHDI TSx"); |
| 322 | int ret; |
| 323 | |
| 324 | if (!msg) |
| 325 | return -ENOMEM; |
| 326 | |
| 327 | ret = read(bfd->fd, msg->data, D_TSX_ALLOC_SIZE); |
| 328 | if (ret < 0 || ret != D_TSX_ALLOC_SIZE) { |
| 329 | fprintf(stderr, "read error %d %s\n", ret, strerror(errno)); |
| 330 | return ret; |
| 331 | } |
| 332 | |
| 333 | if (invertbits) { |
| 334 | flip_buf_bits(msg->data, ret); |
| 335 | } |
| 336 | |
| 337 | msgb_put(msg, ret); |
| 338 | |
| 339 | msg->l2h = msg->data; |
Harald Welte | cc2241b | 2011-07-19 16:06:06 +0200 | [diff] [blame] | 340 | DEBUGP(DLMIB, "BCHAN RX: %s\n", |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 341 | osmo_hexdump(msgb_l2(msg), ret)); |
| 342 | ret = e1inp_rx_ts(e1i_ts, msg, 0, 0); |
| 343 | /* physical layer indicates that data has been sent, |
| 344 | * we thus can send some more data */ |
| 345 | ret = handle_tsX_write(bfd); |
| 346 | msgb_free(msg); |
| 347 | |
| 348 | return ret; |
| 349 | } |
| 350 | |
| 351 | /* callback from select.c in case one of the fd's can be read/written */ |
| 352 | static int dahdi_fd_cb(struct osmo_fd *bfd, unsigned int what) |
| 353 | { |
| 354 | struct e1inp_line *line = bfd->data; |
| 355 | unsigned int ts_nr = bfd->priv_nr; |
| 356 | unsigned int idx = ts_nr-1; |
| 357 | struct e1inp_ts *e1i_ts = &line->ts[idx]; |
| 358 | int rc = 0; |
| 359 | |
| 360 | switch (e1i_ts->type) { |
| 361 | case E1INP_TS_TYPE_SIGN: |
| 362 | if (what & BSC_FD_EXCEPT) |
| 363 | handle_dahdi_exception(e1i_ts); |
| 364 | if (what & BSC_FD_READ) |
| 365 | rc = handle_ts1_read(bfd); |
| 366 | if (what & BSC_FD_WRITE) |
| 367 | rc = handle_ts1_write(bfd); |
| 368 | break; |
| 369 | case E1INP_TS_TYPE_TRAU: |
| 370 | if (what & BSC_FD_EXCEPT) |
| 371 | handle_dahdi_exception(e1i_ts); |
| 372 | if (what & BSC_FD_READ) |
| 373 | rc = handle_tsX_read(bfd); |
| 374 | if (what & BSC_FD_WRITE) |
| 375 | rc = handle_tsX_write(bfd); |
| 376 | /* We never include the DAHDI B-Channel FD into the |
| 377 | * writeset, since it doesn't support poll() based |
| 378 | * write flow control */ |
| 379 | break; |
| 380 | default: |
| 381 | fprintf(stderr, "unknown E1 TS type %u\n", e1i_ts->type); |
| 382 | break; |
| 383 | } |
| 384 | |
| 385 | return rc; |
| 386 | } |
| 387 | |
Pablo Neira Ayuso | c00ee73 | 2011-06-21 12:22:49 +0200 | [diff] [blame] | 388 | static int dahdi_e1_line_update(struct e1inp_line *line, |
| 389 | enum e1inp_line_role role, const char *addr); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 390 | |
| 391 | struct e1inp_driver dahdi_driver = { |
| 392 | .name = "dahdi", |
| 393 | .want_write = ts_want_write, |
| 394 | .line_update = &dahdi_e1_line_update, |
| 395 | }; |
| 396 | |
| 397 | void dahdi_set_bufinfo(int fd, int as_sigchan) |
| 398 | { |
| 399 | struct dahdi_bufferinfo bi; |
| 400 | int x = 0; |
| 401 | |
| 402 | if (ioctl(fd, DAHDI_GET_BUFINFO, &bi)) { |
| 403 | fprintf(stderr, "Error getting bufinfo\n"); |
| 404 | exit(-1); |
| 405 | } |
| 406 | |
| 407 | if (as_sigchan) { |
| 408 | bi.numbufs = 4; |
| 409 | bi.bufsize = 512; |
| 410 | } else { |
| 411 | bi.numbufs = 8; |
| 412 | bi.bufsize = D_BCHAN_TX_GRAN; |
| 413 | bi.txbufpolicy = DAHDI_POLICY_WHEN_FULL; |
| 414 | } |
| 415 | |
| 416 | if (ioctl(fd, DAHDI_SET_BUFINFO, &bi)) { |
| 417 | fprintf(stderr, "Error setting bufinfo\n"); |
| 418 | exit(-1); |
| 419 | } |
| 420 | |
| 421 | if (!as_sigchan) { |
| 422 | if (ioctl(fd, DAHDI_AUDIOMODE, &x)) { |
| 423 | fprintf(stderr, "Error setting bufinfo\n"); |
| 424 | exit(-1); |
| 425 | } |
| 426 | } else { |
| 427 | int one = 1; |
| 428 | ioctl(fd, DAHDI_HDLCFCSMODE, &one); |
| 429 | /* we cannot reliably check for the ioctl return value here |
| 430 | * as this command will fail if the slot _already_ was a |
| 431 | * signalling slot before :( */ |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | static int dahdi_e1_setup(struct e1inp_line *line) |
| 436 | { |
| 437 | int ts, ret; |
| 438 | |
| 439 | /* TS0 is CRC4, don't need any fd for it */ |
| 440 | for (ts = 1; ts < NUM_E1_TS; ts++) { |
| 441 | unsigned int idx = ts-1; |
| 442 | char openstr[128]; |
| 443 | struct e1inp_ts *e1i_ts = &line->ts[idx]; |
| 444 | struct osmo_fd *bfd = &e1i_ts->driver.dahdi.fd; |
Harald Welte | f3ca61c | 2011-08-09 11:21:23 +0200 | [diff] [blame] | 445 | int dev_nr; |
| 446 | |
| 447 | /* DAHDI device names/numbers just keep incrementing |
| 448 | * even over multiple boards. So TS1 of the second |
| 449 | * board will be 32 */ |
| 450 | dev_nr = line->num * (NUM_E1_TS-1) + ts; |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 451 | |
| 452 | bfd->data = line; |
| 453 | bfd->priv_nr = ts; |
| 454 | bfd->cb = dahdi_fd_cb; |
Harald Welte | f3ca61c | 2011-08-09 11:21:23 +0200 | [diff] [blame] | 455 | snprintf(openstr, sizeof(openstr), "/dev/dahdi/%d", dev_nr); |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 456 | |
| 457 | switch (e1i_ts->type) { |
| 458 | case E1INP_TS_TYPE_NONE: |
| 459 | continue; |
| 460 | break; |
| 461 | case E1INP_TS_TYPE_SIGN: |
| 462 | bfd->fd = open(openstr, O_RDWR | O_NONBLOCK); |
| 463 | if (bfd->fd == -1) { |
| 464 | fprintf(stderr, "%s could not open %s %s\n", |
| 465 | __func__, openstr, strerror(errno)); |
| 466 | exit(-1); |
| 467 | } |
| 468 | bfd->when = BSC_FD_READ | BSC_FD_EXCEPT; |
| 469 | dahdi_set_bufinfo(bfd->fd, 1); |
| 470 | e1i_ts->driver.dahdi.lapd = lapd_instance_alloc(1, dahdi_write_msg, bfd); |
| 471 | break; |
| 472 | case E1INP_TS_TYPE_TRAU: |
| 473 | bfd->fd = open(openstr, O_RDWR | O_NONBLOCK); |
| 474 | if (bfd->fd == -1) { |
| 475 | fprintf(stderr, "%s could not open %s %s\n", |
| 476 | __func__, openstr, strerror(errno)); |
| 477 | exit(-1); |
| 478 | } |
| 479 | dahdi_set_bufinfo(bfd->fd, 0); |
| 480 | /* We never include the DAHDI B-Channel FD into the |
| 481 | * writeset, since it doesn't support poll() based |
| 482 | * write flow control */ |
| 483 | bfd->when = BSC_FD_READ | BSC_FD_EXCEPT;// | BSC_FD_WRITE; |
| 484 | break; |
| 485 | } |
| 486 | |
| 487 | if (bfd->fd < 0) { |
| 488 | fprintf(stderr, "%s could not open %s %s\n", |
| 489 | __func__, openstr, strerror(errno)); |
| 490 | return bfd->fd; |
| 491 | } |
| 492 | |
| 493 | ret = osmo_fd_register(bfd); |
| 494 | if (ret < 0) { |
| 495 | fprintf(stderr, "could not register FD: %s\n", |
| 496 | strerror(ret)); |
| 497 | return ret; |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | return 0; |
| 502 | } |
| 503 | |
Pablo Neira Ayuso | c00ee73 | 2011-06-21 12:22:49 +0200 | [diff] [blame] | 504 | static int dahdi_e1_line_update(struct e1inp_line *line, |
Pablo Neira Ayuso | 0b9ed9a | 2011-07-02 17:25:19 +0200 | [diff] [blame] | 505 | enum e1inp_line_role role, const char *addr) |
Pablo Neira Ayuso | 0ba77d5 | 2011-06-05 18:32:44 +0200 | [diff] [blame] | 506 | { |
| 507 | if (line->driver != &dahdi_driver) |
| 508 | return -EINVAL; |
| 509 | |
| 510 | return dahdi_e1_setup(line); |
| 511 | } |
| 512 | |
| 513 | int e1inp_dahdi_init(void) |
| 514 | { |
| 515 | init_flip_bits(); |
| 516 | |
| 517 | /* register the driver with the core */ |
| 518 | return e1inp_driver_register(&dahdi_driver); |
| 519 | } |