2 * Copyright (c) 2001 Cubical Solutions Ltd. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * capi/capi_l4if.c The CAPI i4b L4/device interface.
27 * $FreeBSD: src/sys/i4b/capi/capi_l4if.c,v 1.1.2.1 2001/08/10 14:08:34 obrien Exp $
30 #include <sys/param.h>
31 #include <sys/kernel.h>
32 #include <sys/systm.h>
34 #include <sys/socket.h>
35 #include <sys/thread2.h>
38 #include <net/i4b/include/machine/i4b_debug.h>
39 #include <net/i4b/include/machine/i4b_ioctl.h>
40 #include <net/i4b/include/machine/i4b_cause.h>
42 #include "../include/i4b_l3l4.h"
43 #include "../include/i4b_mbuf.h"
44 #include "../include/i4b_global.h"
45 #include "../layer4/i4b_l4.h"
48 #include "capi_msgs.h"
50 static void n_connect_request(u_int cdid);
51 static void n_connect_response(u_int cdid, int response, int cause);
52 static void n_disconnect_request(u_int cdid, int cause);
53 static void n_alert_request(u_int cdid);
54 static void n_mgmt_command(int unit, int cmd, void *parm);
55 static int n_download(int unit, int, struct isdn_dr_prot *);
57 capi_softc_t *capi_sc[MAX_CONTROLLERS] = { NULL, };
61 // i4b_capi_{ret,set}_linktab
64 // i4b_capi_bch_config
65 // Called by i4b driver to flush + {en,dis}able a channel.
67 // i4b_capi_bch_start_tx
68 // Called by i4b driver to transmit a queued mbuf.
71 // Called by i4b driver to obtain statistics information.
75 i4b_capi_ret_linktab(int unit, int channel)
77 capi_softc_t *sc = capi_sc[unit];
78 return &sc->sc_bchan[channel].capi_isdn_linktab;
82 i4b_capi_set_linktab(int unit, int channel, drvr_link_t *dlt)
84 capi_softc_t *sc = capi_sc[unit];
85 sc->sc_bchan[channel].capi_drvr_linktab = dlt;
89 i4b_capi_bch_config(int unit, int chan, int bprot, int activate)
91 capi_softc_t *sc = capi_sc[unit];
93 i4b_Bcleanifq(&sc->sc_bchan[chan].tx_queue);
94 sc->sc_bchan[chan].tx_queue.ifq_maxlen = IFQ_MAXLEN;
95 sc->sc_bchan[chan].txcount = 0;
97 /* The telephony drivers use rx_queue for receive. */
99 i4b_Bcleanifq(&sc->sc_bchan[chan].rx_queue);
100 sc->sc_bchan[chan].rx_queue.ifq_maxlen = IFQ_MAXLEN;
101 sc->sc_bchan[chan].rxcount = 0;
103 /* HDLC frames are put to in_mbuf */
105 i4b_Bfreembuf(sc->sc_bchan[chan].in_mbuf);
106 sc->sc_bchan[chan].in_mbuf = NULL;
108 /* Because of the difference, we need to remember the protocol. */
110 sc->sc_bchan[chan].bprot = bprot;
111 sc->sc_bchan[chan].busy = 0;
115 i4b_capi_bch_start_tx(int unit, int chan)
117 capi_softc_t *sc = capi_sc[unit];
120 if (sc->sc_bchan[chan].state != B_CONNECTED) {
122 kprintf("capi%d: start_tx on unconnected channel\n", sc->sc_unit);
126 if (sc->sc_bchan[chan].busy) {
131 capi_start_tx(sc, chan);
137 i4b_capi_bch_stat(int unit, int chan, bchan_statistics_t *bsp)
139 capi_softc_t *sc = capi_sc[unit];
143 bsp->outbytes = sc->sc_bchan[chan].txcount;
144 bsp->inbytes = sc->sc_bchan[chan].rxcount;
146 sc->sc_bchan[chan].txcount = 0;
147 sc->sc_bchan[chan].rxcount = 0;
153 capi_start_tx(capi_softc_t *sc, int chan)
158 IF_DEQUEUE(&sc->sc_bchan[chan].tx_queue, m_b3);
160 struct mbuf *m = m_b3->m_next;
162 sc->sc_bchan[chan].txcount += m_b3->m_len;
163 capi_data_b3_req(sc, chan, m_b3);
169 if (sc->sc_bchan[chan].capi_drvr_linktab) {
170 /* Notify i4b driver of activity, and if the queue is drained. */
173 (*sc->sc_bchan[chan].capi_drvr_linktab->bch_activity)(
174 sc->sc_bchan[chan].capi_drvr_linktab->unit, ACT_TX);
176 if (IF_QEMPTY(&sc->sc_bchan[chan].tx_queue))
177 (*sc->sc_bchan[chan].capi_drvr_linktab->bch_tx_queue_empty)(
178 sc->sc_bchan[chan].capi_drvr_linktab->unit);
186 // Called by a link layer driver at boot time.
190 capi_ll_attach(capi_softc_t *sc)
194 if (ncapi == NELEM(capi_sc)) {
195 kprintf("capi%d: too many units, increase MAX_CONTROLLERS\n", ncapi);
199 /* Unit type and subtype; sc is partly filled by ll driver */
201 ctrl_desc[nctrl].unit = ncapi;
202 ctrl_desc[nctrl].ctrl_type = CTRL_CAPI;
203 ctrl_desc[nctrl].card_type = sc->card_type;
207 ctrl_types[CTRL_CAPI].get_linktab = i4b_capi_ret_linktab;
208 ctrl_types[CTRL_CAPI].set_linktab = i4b_capi_set_linktab;
210 ctrl_desc[nctrl].N_CONNECT_REQUEST = n_connect_request;
211 ctrl_desc[nctrl].N_CONNECT_RESPONSE = n_connect_response;
212 ctrl_desc[nctrl].N_DISCONNECT_REQUEST = n_disconnect_request;
213 ctrl_desc[nctrl].N_ALERT_REQUEST = n_alert_request;
214 ctrl_desc[nctrl].N_DOWNLOAD = n_download;
215 ctrl_desc[nctrl].N_DIAGNOSTICS = NULL; /* XXX todo */
216 ctrl_desc[nctrl].N_MGMT_COMMAND = n_mgmt_command;
220 sc->sc_enabled = FALSE;
221 sc->sc_state = C_DOWN;
224 ctrl_desc[nctrl].dl_est = DL_DOWN;
225 ctrl_desc[nctrl].nbch = sc->sc_nbch;
227 for (i = 0; i < sc->sc_nbch; i++) {
228 ctrl_desc[nctrl].bch_state[i] = BCH_ST_FREE;
229 sc->sc_bchan[i].ncci = INVALID;
230 sc->sc_bchan[i].msgid = 0;
231 sc->sc_bchan[i].busy = 0;
232 sc->sc_bchan[i].state = B_FREE;
234 memset(&sc->sc_bchan[i].tx_queue, 0, sizeof(struct ifqueue));
235 memset(&sc->sc_bchan[i].rx_queue, 0, sizeof(struct ifqueue));
236 sc->sc_bchan[i].tx_queue.ifq_maxlen = IFQ_MAXLEN;
237 sc->sc_bchan[i].rx_queue.ifq_maxlen = IFQ_MAXLEN;
238 sc->sc_bchan[i].txcount = 0;
239 sc->sc_bchan[i].rxcount = 0;
241 sc->sc_bchan[i].cdid = CDID_UNUSED;
242 sc->sc_bchan[i].bprot = BPROT_NONE;
243 sc->sc_bchan[i].in_mbuf = NULL;
245 sc->sc_bchan[i].capi_drvr_linktab = NULL;
247 sc->sc_bchan[i].capi_isdn_linktab.unit = ncapi;
248 sc->sc_bchan[i].capi_isdn_linktab.channel = i;
249 sc->sc_bchan[i].capi_isdn_linktab.bch_config = i4b_capi_bch_config;
250 sc->sc_bchan[i].capi_isdn_linktab.bch_tx_start = i4b_capi_bch_start_tx;
251 sc->sc_bchan[i].capi_isdn_linktab.bch_stat = i4b_capi_bch_stat;
252 sc->sc_bchan[i].capi_isdn_linktab.tx_queue = &sc->sc_bchan[i].tx_queue;
253 sc->sc_bchan[i].capi_isdn_linktab.rx_queue = &sc->sc_bchan[i].rx_queue;
254 sc->sc_bchan[i].capi_isdn_linktab.rx_mbuf = &sc->sc_bchan[i].in_mbuf;
257 ctrl_desc[nctrl].tei = -1;
259 /* Up the controller index and store the softc */
262 capi_sc[ncapi++] = sc;
263 sc->ctrl_unit = nctrl++;
265 kprintf("capi%d: card type %d attached\n", sc->sc_unit, sc->card_type);
272 // i4b L4 management command.
276 n_mgmt_command(int unit, int op, void *arg)
278 capi_softc_t *sc = capi_sc[unit];
280 kprintf("capi%d: mgmt command %d\n", sc->sc_unit, op);
284 sc->sc_enabled = TRUE;
288 sc->sc_enabled = FALSE;
301 // i4b L4 wants to connect. We assign a B channel to the call,
302 // send a CAPI_CONNECT_REQ, and set the channel to B_CONNECT_CONF.
306 n_connect_request(u_int cdid)
308 call_desc_t *cd = cd_by_cdid(cdid);
313 kprintf("capi?: invalid cdid %d\n", cdid);
317 sc = capi_sc[ctrl_desc[cd->controller].unit];
322 if ((bch < 0) || (bch >= sc->sc_nbch))
323 for (bch = 0; bch < sc->sc_nbch; bch++)
324 if (sc->sc_bchan[bch].state == B_FREE)
327 if (bch == sc->sc_nbch) {
329 kprintf("capi%d: no free B channel\n", sc->sc_unit);
335 capi_connect_req(sc, cd);
340 // n_connect_response
341 // i4b L4 answers a call. We send a CONNECT_RESP with the proper
342 // Reject code, and set the channel to B_CONNECT_B3_IND or B_FREE,
343 // depending whether we answer or not.
347 n_connect_response(u_int cdid, int response, int cause)
349 call_desc_t *cd = cd_by_cdid(cdid);
354 kprintf("capi?: invalid cdid %d\n", cdid);
358 sc = capi_sc[ctrl_desc[cd->controller].unit];
363 cd->response = response;
364 cd->cause_out = cause;
367 capi_connect_resp(sc, cd);
372 // n_disconnect_request
373 // i4b L4 wants to disconnect. We send a DISCONNECT_REQ and
374 // set the channel to B_DISCONNECT_CONF.
378 n_disconnect_request(u_int cdid, int cause)
380 call_desc_t *cd = cd_by_cdid(cdid);
385 kprintf("capi?: invalid cdid %d\n", cdid);
389 sc = capi_sc[ctrl_desc[cd->controller].unit];
392 cd->cause_out = cause;
395 capi_disconnect_req(sc, cd);
401 // i4b L4 wants to alert an incoming call. We send ALERT_REQ.
405 n_alert_request(u_int cdid)
407 call_desc_t *cd = cd_by_cdid(cdid);
411 kprintf("capi?: invalid cdid %d\n", cdid);
415 sc = capi_sc[ctrl_desc[cd->controller].unit];
418 capi_alert_req(sc, cd);
424 // L4 -> firmware download
428 n_download(int unit, int numprotos, struct isdn_dr_prot *protocols)
430 capi_softc_t *sc = capi_sc[unit];
433 (*capi_sc[unit]->load)(sc, protocols[0].bytecount,
434 protocols[0].microcode);