1 /*
2 * Kernel CAPI interface for the Gigaset driver
3 *
4 * Copyright (c) 2009 by Tilman Schmidt <tilman@imap.cc>.
5 *
6 * =====================================================================
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 * =====================================================================
12 */
13
14 #include "gigaset.h"
15 #include <linux/proc_fs.h>
16 #include <linux/seq_file.h>
17 #include <linux/isdn/capilli.h>
18 #include <linux/isdn/capicmd.h>
19 #include <linux/isdn/capiutil.h>
20 #include <linux/export.h>
21
22 /* missing from kernelcapi.h */
23 #define CapiNcpiNotSupportedByProtocol 0x0001
24 #define CapiFlagsNotSupportedByProtocol 0x0002
25 #define CapiAlertAlreadySent 0x0003
26 #define CapiFacilitySpecificFunctionNotSupported 0x3011
27
28 /* missing from capicmd.h */
29 #define CAPI_CONNECT_IND_BASELEN (CAPI_MSG_BASELEN+4+2+8*1)
30 #define CAPI_CONNECT_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN+4+3*1)
31 #define CAPI_CONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN+4+1)
32 #define CAPI_CONNECT_B3_ACTIVE_IND_BASELEN (CAPI_MSG_BASELEN+4+1)
33 #define CAPI_DATA_B3_REQ_LEN64 (CAPI_MSG_BASELEN+4+4+2+2+2+8)
34 #define CAPI_DATA_B3_CONF_LEN (CAPI_MSG_BASELEN+4+2+2)
35 #define CAPI_DISCONNECT_IND_LEN (CAPI_MSG_BASELEN+4+2)
36 #define CAPI_DISCONNECT_B3_IND_BASELEN (CAPI_MSG_BASELEN+4+2+1)
37 #define CAPI_FACILITY_CONF_BASELEN (CAPI_MSG_BASELEN+4+2+2+1)
38 /* most _CONF messages contain only Controller/PLCI/NCCI and Info parameters */
39 #define CAPI_STDCONF_LEN (CAPI_MSG_BASELEN+4+2)
40
41 #define CAPI_FACILITY_HANDSET 0x0000
42 #define CAPI_FACILITY_DTMF 0x0001
43 #define CAPI_FACILITY_V42BIS 0x0002
44 #define CAPI_FACILITY_SUPPSVC 0x0003
45 #define CAPI_FACILITY_WAKEUP 0x0004
46 #define CAPI_FACILITY_LI 0x0005
47
48 #define CAPI_SUPPSVC_GETSUPPORTED 0x0000
49 #define CAPI_SUPPSVC_LISTEN 0x0001
50
51 /* missing from capiutil.h */
52 #define CAPIMSG_PLCI_PART(m) CAPIMSG_U8(m, 9)
53 #define CAPIMSG_NCCI_PART(m) CAPIMSG_U16(m, 10)
54 #define CAPIMSG_HANDLE_REQ(m) CAPIMSG_U16(m, 18) /* DATA_B3_REQ/_IND only! */
55 #define CAPIMSG_FLAGS(m) CAPIMSG_U16(m, 20)
56 #define CAPIMSG_SETCONTROLLER(m, contr) capimsg_setu8(m, 8, contr)
57 #define CAPIMSG_SETPLCI_PART(m, plci) capimsg_setu8(m, 9, plci)
58 #define CAPIMSG_SETNCCI_PART(m, ncci) capimsg_setu16(m, 10, ncci)
59 #define CAPIMSG_SETFLAGS(m, flags) capimsg_setu16(m, 20, flags)
60
61 /* parameters with differing location in DATA_B3_CONF/_RESP: */
62 #define CAPIMSG_SETHANDLE_CONF(m, handle) capimsg_setu16(m, 12, handle)
63 #define CAPIMSG_SETINFO_CONF(m, info) capimsg_setu16(m, 14, info)
64
65 /* Flags (DATA_B3_REQ/_IND) */
66 #define CAPI_FLAGS_DELIVERY_CONFIRMATION 0x04
67 #define CAPI_FLAGS_RESERVED (~0x1f)
68
69 /* buffer sizes */
70 #define MAX_BC_OCTETS 11
71 #define MAX_HLC_OCTETS 3
72 #define MAX_NUMBER_DIGITS 20
73 #define MAX_FMT_IE_LEN 20
74
75 /* values for bcs->apconnstate */
76 #define APCONN_NONE 0 /* inactive/listening */
77 #define APCONN_SETUP 1 /* connecting */
78 #define APCONN_ACTIVE 2 /* B channel up */
79
80 /* registered application data structure */
81 struct gigaset_capi_appl {
82 struct list_head ctrlist;
83 struct gigaset_capi_appl *bcnext;
84 u16 id;
85 struct capi_register_params rp;
86 u16 nextMessageNumber;
87 u32 listenInfoMask;
88 u32 listenCIPmask;
89 };
90
91 /* CAPI specific controller data structure */
92 struct gigaset_capi_ctr {
93 struct capi_ctr ctr;
94 struct list_head appls;
95 struct sk_buff_head sendqueue;
96 atomic_t sendqlen;
97 /* two _cmsg structures possibly used concurrently: */
98 _cmsg hcmsg; /* for message composition triggered from hardware */
99 _cmsg acmsg; /* for dissection of messages sent from application */
100 u8 bc_buf[MAX_BC_OCTETS+1];
101 u8 hlc_buf[MAX_HLC_OCTETS+1];
102 u8 cgpty_buf[MAX_NUMBER_DIGITS+3];
103 u8 cdpty_buf[MAX_NUMBER_DIGITS+2];
104 };
105
106 /* CIP Value table (from CAPI 2.0 standard, ch. 6.1) */
107 static struct {
108 u8 *bc;
109 u8 *hlc;
110 } cip2bchlc[] = {
111 [1] = { "8090A3", NULL },
112 /* Speech (A-law) */
113 [2] = { "8890", NULL },
114 /* Unrestricted digital information */
115 [3] = { "8990", NULL },
116 /* Restricted digital information */
117 [4] = { "9090A3", NULL },
118 /* 3,1 kHz audio (A-law) */
119 [5] = { "9190", NULL },
120 /* 7 kHz audio */
121 [6] = { "9890", NULL },
122 /* Video */
123 [7] = { "88C0C6E6", NULL },
124 /* Packet mode */
125 [8] = { "8890218F", NULL },
126 /* 56 kbit/s rate adaptation */
127 [9] = { "9190A5", NULL },
128 /* Unrestricted digital information with tones/announcements */
129 [16] = { "8090A3", "9181" },
130 /* Telephony */
131 [17] = { "9090A3", "9184" },
132 /* Group 2/3 facsimile */
133 [18] = { "8890", "91A1" },
134 /* Group 4 facsimile Class 1 */
135 [19] = { "8890", "91A4" },
136 /* Teletex service basic and mixed mode
137 and Group 4 facsimile service Classes II and III */
138 [20] = { "8890", "91A8" },
139 /* Teletex service basic and processable mode */
140 [21] = { "8890", "91B1" },
141 /* Teletex service basic mode */
142 [22] = { "8890", "91B2" },
143 /* International interworking for Videotex */
144 [23] = { "8890", "91B5" },
145 /* Telex */
146 [24] = { "8890", "91B8" },
147 /* Message Handling Systems in accordance with X.400 */
148 [25] = { "8890", "91C1" },
149 /* OSI application in accordance with X.200 */
150 [26] = { "9190A5", "9181" },
151 /* 7 kHz telephony */
152 [27] = { "9190A5", "916001" },
153 /* Video telephony, first connection */
154 [28] = { "8890", "916002" },
155 /* Video telephony, second connection */
156 };
157
158 /*
159 * helper functions
160 * ================
161 */
162
163 /*
164 * emit unsupported parameter warning
165 */
ignore_cstruct_param(struct cardstate * cs,_cstruct param,char * msgname,char * paramname)166 static inline void ignore_cstruct_param(struct cardstate *cs, _cstruct param,
167 char *msgname, char *paramname)
168 {
169 if (param && *param)
170 dev_warn(cs->dev, "%s: ignoring unsupported parameter: %s\n",
171 msgname, paramname);
172 }
173
174 /*
175 * convert an IE from Gigaset hex string to ETSI binary representation
176 * including length byte
177 * return value: result length, -1 on error
178 */
encode_ie(char * in,u8 * out,int maxlen)179 static int encode_ie(char *in, u8 *out, int maxlen)
180 {
181 int l = 0;
182 while (*in) {
183 if (!isxdigit(in[0]) || !isxdigit(in[1]) || l >= maxlen)
184 return -1;
185 out[++l] = (hex_to_bin(in[0]) << 4) + hex_to_bin(in[1]);
186 in += 2;
187 }
188 out[0] = l;
189 return l;
190 }
191
192 /*
193 * convert an IE from ETSI binary representation including length byte
194 * to Gigaset hex string
195 */
decode_ie(u8 * in,char * out)196 static void decode_ie(u8 *in, char *out)
197 {
198 int i = *in;
199 while (i-- > 0) {
200 /* ToDo: conversion to upper case necessary? */
201 *out++ = toupper(hex_asc_hi(*++in));
202 *out++ = toupper(hex_asc_lo(*in));
203 }
204 }
205
206 /*
207 * retrieve application data structure for an application ID
208 */
209 static inline struct gigaset_capi_appl *
get_appl(struct gigaset_capi_ctr * iif,u16 appl)210 get_appl(struct gigaset_capi_ctr *iif, u16 appl)
211 {
212 struct gigaset_capi_appl *ap;
213
214 list_for_each_entry(ap, &iif->appls, ctrlist)
215 if (ap->id == appl)
216 return ap;
217 return NULL;
218 }
219
220 /*
221 * dump CAPI message to kernel messages for debugging
222 */
dump_cmsg(enum debuglevel level,const char * tag,_cmsg * p)223 static inline void dump_cmsg(enum debuglevel level, const char *tag, _cmsg *p)
224 {
225 #ifdef CONFIG_GIGASET_DEBUG
226 _cdebbuf *cdb;
227
228 if (!(gigaset_debuglevel & level))
229 return;
230
231 cdb = capi_cmsg2str(p);
232 if (cdb) {
233 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId, cdb->buf);
234 cdebbuf_free(cdb);
235 } else {
236 gig_dbg(level, "%s: [%d] %s", tag, p->ApplId,
237 capi_cmd2str(p->Command, p->Subcommand));
238 }
239 #endif
240 }
241
dump_rawmsg(enum debuglevel level,const char * tag,unsigned char * data)242 static inline void dump_rawmsg(enum debuglevel level, const char *tag,
243 unsigned char *data)
244 {
245 #ifdef CONFIG_GIGASET_DEBUG
246 char *dbgline;
247 int i, l;
248
249 if (!(gigaset_debuglevel & level))
250 return;
251
252 l = CAPIMSG_LEN(data);
253 if (l < 12) {
254 gig_dbg(level, "%s: ??? LEN=%04d", tag, l);
255 return;
256 }
257 gig_dbg(level, "%s: 0x%02x:0x%02x: ID=%03d #0x%04x LEN=%04d NCCI=0x%x",
258 tag, CAPIMSG_COMMAND(data), CAPIMSG_SUBCOMMAND(data),
259 CAPIMSG_APPID(data), CAPIMSG_MSGID(data), l,
260 CAPIMSG_CONTROL(data));
261 l -= 12;
262 dbgline = kmalloc(3*l, GFP_ATOMIC);
263 if (!dbgline)
264 return;
265 for (i = 0; i < l; i++) {
266 dbgline[3*i] = hex_asc_hi(data[12+i]);
267 dbgline[3*i+1] = hex_asc_lo(data[12+i]);
268 dbgline[3*i+2] = ' ';
269 }
270 dbgline[3*l-1] = '\0';
271 gig_dbg(level, " %s", dbgline);
272 kfree(dbgline);
273 if (CAPIMSG_COMMAND(data) == CAPI_DATA_B3 &&
274 (CAPIMSG_SUBCOMMAND(data) == CAPI_REQ ||
275 CAPIMSG_SUBCOMMAND(data) == CAPI_IND)) {
276 l = CAPIMSG_DATALEN(data);
277 gig_dbg(level, " DataLength=%d", l);
278 if (l <= 0 || !(gigaset_debuglevel & DEBUG_LLDATA))
279 return;
280 if (l > 64)
281 l = 64; /* arbitrary limit */
282 dbgline = kmalloc(3*l, GFP_ATOMIC);
283 if (!dbgline)
284 return;
285 data += CAPIMSG_LEN(data);
286 for (i = 0; i < l; i++) {
287 dbgline[3*i] = hex_asc_hi(data[i]);
288 dbgline[3*i+1] = hex_asc_lo(data[i]);
289 dbgline[3*i+2] = ' ';
290 }
291 dbgline[3*l-1] = '\0';
292 gig_dbg(level, " %s", dbgline);
293 kfree(dbgline);
294 }
295 #endif
296 }
297
298 /*
299 * format CAPI IE as string
300 */
301
format_ie(const char * ie)302 static const char *format_ie(const char *ie)
303 {
304 static char result[3*MAX_FMT_IE_LEN];
305 int len, count;
306 char *pout = result;
307
308 if (!ie)
309 return "NULL";
310
311 count = len = ie[0];
312 if (count > MAX_FMT_IE_LEN)
313 count = MAX_FMT_IE_LEN-1;
314 while (count--) {
315 *pout++ = hex_asc_hi(*++ie);
316 *pout++ = hex_asc_lo(*ie);
317 *pout++ = ' ';
318 }
319 if (len > MAX_FMT_IE_LEN) {
320 *pout++ = '.';
321 *pout++ = '.';
322 *pout++ = '.';
323 }
324 *--pout = 0;
325 return result;
326 }
327
328 /*
329 * emit DATA_B3_CONF message
330 */
send_data_b3_conf(struct cardstate * cs,struct capi_ctr * ctr,u16 appl,u16 msgid,int channel,u16 handle,u16 info)331 static void send_data_b3_conf(struct cardstate *cs, struct capi_ctr *ctr,
332 u16 appl, u16 msgid, int channel,
333 u16 handle, u16 info)
334 {
335 struct sk_buff *cskb;
336 u8 *msg;
337
338 cskb = alloc_skb(CAPI_DATA_B3_CONF_LEN, GFP_ATOMIC);
339 if (!cskb) {
340 dev_err(cs->dev, "%s: out of memory\n", __func__);
341 return;
342 }
343 /* frequent message, avoid _cmsg overhead */
344 msg = __skb_put(cskb, CAPI_DATA_B3_CONF_LEN);
345 CAPIMSG_SETLEN(msg, CAPI_DATA_B3_CONF_LEN);
346 CAPIMSG_SETAPPID(msg, appl);
347 CAPIMSG_SETCOMMAND(msg, CAPI_DATA_B3);
348 CAPIMSG_SETSUBCOMMAND(msg, CAPI_CONF);
349 CAPIMSG_SETMSGID(msg, msgid);
350 CAPIMSG_SETCONTROLLER(msg, ctr->cnr);
351 CAPIMSG_SETPLCI_PART(msg, channel);
352 CAPIMSG_SETNCCI_PART(msg, 1);
353 CAPIMSG_SETHANDLE_CONF(msg, handle);
354 CAPIMSG_SETINFO_CONF(msg, info);
355
356 /* emit message */
357 dump_rawmsg(DEBUG_MCMD, __func__, msg);
358 capi_ctr_handle_message(ctr, appl, cskb);
359 }
360
361
362 /*
363 * driver interface functions
364 * ==========================
365 */
366
367 /**
368 * gigaset_skb_sent() - acknowledge transmission of outgoing skb
369 * @bcs: B channel descriptor structure.
370 * @skb: sent data.
371 *
372 * Called by hardware module {bas,ser,usb}_gigaset when the data in a
373 * skb has been successfully sent, for signalling completion to the LL.
374 */
gigaset_skb_sent(struct bc_state * bcs,struct sk_buff * dskb)375 void gigaset_skb_sent(struct bc_state *bcs, struct sk_buff *dskb)
376 {
377 struct cardstate *cs = bcs->cs;
378 struct gigaset_capi_ctr *iif = cs->iif;
379 struct gigaset_capi_appl *ap = bcs->ap;
380 unsigned char *req = skb_mac_header(dskb);
381 u16 flags;
382
383 /* update statistics */
384 ++bcs->trans_up;
385
386 if (!ap) {
387 gig_dbg(DEBUG_MCMD, "%s: application gone", __func__);
388 return;
389 }
390
391 /* don't send further B3 messages if disconnected */
392 if (bcs->apconnstate < APCONN_ACTIVE) {
393 gig_dbg(DEBUG_MCMD, "%s: disconnected", __func__);
394 return;
395 }
396
397 /*
398 * send DATA_B3_CONF if "delivery confirmation" bit was set in request;
399 * otherwise it has already been sent by do_data_b3_req()
400 */
401 flags = CAPIMSG_FLAGS(req);
402 if (flags & CAPI_FLAGS_DELIVERY_CONFIRMATION)
403 send_data_b3_conf(cs, &iif->ctr, ap->id, CAPIMSG_MSGID(req),
404 bcs->channel + 1, CAPIMSG_HANDLE_REQ(req),
405 (flags & ~CAPI_FLAGS_DELIVERY_CONFIRMATION) ?
406 CapiFlagsNotSupportedByProtocol :
407 CAPI_NOERROR);
408 }
409 EXPORT_SYMBOL_GPL(gigaset_skb_sent);
410
411 /**
412 * gigaset_skb_rcvd() - pass received skb to LL
413 * @bcs: B channel descriptor structure.
414 * @skb: received data.
415 *
416 * Called by hardware module {bas,ser,usb}_gigaset when user data has
417 * been successfully received, for passing to the LL.
418 * Warning: skb must not be accessed anymore!
419 */
gigaset_skb_rcvd(struct bc_state * bcs,struct sk_buff * skb)420 void gigaset_skb_rcvd(struct bc_state *bcs, struct sk_buff *skb)
421 {
422 struct cardstate *cs = bcs->cs;
423 struct gigaset_capi_ctr *iif = cs->iif;
424 struct gigaset_capi_appl *ap = bcs->ap;
425 int len = skb->len;
426
427 /* update statistics */
428 bcs->trans_down++;
429
430 if (!ap) {
431 gig_dbg(DEBUG_MCMD, "%s: application gone", __func__);
432 dev_kfree_skb_any(skb);
433 return;
434 }
435
436 /* don't send further B3 messages if disconnected */
437 if (bcs->apconnstate < APCONN_ACTIVE) {
438 gig_dbg(DEBUG_MCMD, "%s: disconnected", __func__);
439 dev_kfree_skb_any(skb);
440 return;
441 }
442
443 /*
444 * prepend DATA_B3_IND message to payload
445 * Parameters: NCCI = 1, all others 0/unused
446 * frequent message, avoid _cmsg overhead
447 */
448 skb_push(skb, CAPI_DATA_B3_REQ_LEN);
449 CAPIMSG_SETLEN(skb->data, CAPI_DATA_B3_REQ_LEN);
450 CAPIMSG_SETAPPID(skb->data, ap->id);
451 CAPIMSG_SETCOMMAND(skb->data, CAPI_DATA_B3);
452 CAPIMSG_SETSUBCOMMAND(skb->data, CAPI_IND);
453 CAPIMSG_SETMSGID(skb->data, ap->nextMessageNumber++);
454 CAPIMSG_SETCONTROLLER(skb->data, iif->ctr.cnr);
455 CAPIMSG_SETPLCI_PART(skb->data, bcs->channel + 1);
456 CAPIMSG_SETNCCI_PART(skb->data, 1);
457 /* Data parameter not used */
458 CAPIMSG_SETDATALEN(skb->data, len);
459 /* Data handle parameter not used */
460 CAPIMSG_SETFLAGS(skb->data, 0);
461 /* Data64 parameter not present */
462
463 /* emit message */
464 dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
465 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
466 }
467 EXPORT_SYMBOL_GPL(gigaset_skb_rcvd);
468
469 /**
470 * gigaset_isdn_rcv_err() - signal receive error
471 * @bcs: B channel descriptor structure.
472 *
473 * Called by hardware module {bas,ser,usb}_gigaset when a receive error
474 * has occurred, for signalling to the LL.
475 */
gigaset_isdn_rcv_err(struct bc_state * bcs)476 void gigaset_isdn_rcv_err(struct bc_state *bcs)
477 {
478 /* if currently ignoring packets, just count down */
479 if (bcs->ignore) {
480 bcs->ignore--;
481 return;
482 }
483
484 /* update statistics */
485 bcs->corrupted++;
486
487 /* ToDo: signal error -> LL */
488 }
489 EXPORT_SYMBOL_GPL(gigaset_isdn_rcv_err);
490
491 /**
492 * gigaset_isdn_icall() - signal incoming call
493 * @at_state: connection state structure.
494 *
495 * Called by main module at tasklet level to notify the LL that an incoming
496 * call has been received. @at_state contains the parameters of the call.
497 *
498 * Return value: call disposition (ICALL_*)
499 */
gigaset_isdn_icall(struct at_state_t * at_state)500 int gigaset_isdn_icall(struct at_state_t *at_state)
501 {
502 struct cardstate *cs = at_state->cs;
503 struct bc_state *bcs = at_state->bcs;
504 struct gigaset_capi_ctr *iif = cs->iif;
505 struct gigaset_capi_appl *ap;
506 u32 actCIPmask;
507 struct sk_buff *skb;
508 unsigned int msgsize;
509 unsigned long flags;
510 int i;
511
512 /*
513 * ToDo: signal calls without a free B channel, too
514 * (requires a u8 handle for the at_state structure that can
515 * be stored in the PLCI and used in the CONNECT_RESP message
516 * handler to retrieve it)
517 */
518 if (!bcs)
519 return ICALL_IGNORE;
520
521 /* prepare CONNECT_IND message, using B channel number as PLCI */
522 capi_cmsg_header(&iif->hcmsg, 0, CAPI_CONNECT, CAPI_IND, 0,
523 iif->ctr.cnr | ((bcs->channel + 1) << 8));
524
525 /* minimum size, all structs empty */
526 msgsize = CAPI_CONNECT_IND_BASELEN;
527
528 /* Bearer Capability (mandatory) */
529 if (at_state->str_var[STR_ZBC]) {
530 /* pass on BC from Gigaset */
531 if (encode_ie(at_state->str_var[STR_ZBC], iif->bc_buf,
532 MAX_BC_OCTETS) < 0) {
533 dev_warn(cs->dev, "RING ignored - bad BC %s\n",
534 at_state->str_var[STR_ZBC]);
535 return ICALL_IGNORE;
536 }
537
538 /* look up corresponding CIP value */
539 iif->hcmsg.CIPValue = 0; /* default if nothing found */
540 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
541 if (cip2bchlc[i].bc != NULL &&
542 cip2bchlc[i].hlc == NULL &&
543 !strcmp(cip2bchlc[i].bc,
544 at_state->str_var[STR_ZBC])) {
545 iif->hcmsg.CIPValue = i;
546 break;
547 }
548 } else {
549 /* no BC (internal call): assume CIP 1 (speech, A-law) */
550 iif->hcmsg.CIPValue = 1;
551 encode_ie(cip2bchlc[1].bc, iif->bc_buf, MAX_BC_OCTETS);
552 }
553 iif->hcmsg.BC = iif->bc_buf;
554 msgsize += iif->hcmsg.BC[0];
555
556 /* High Layer Compatibility (optional) */
557 if (at_state->str_var[STR_ZHLC]) {
558 /* pass on HLC from Gigaset */
559 if (encode_ie(at_state->str_var[STR_ZHLC], iif->hlc_buf,
560 MAX_HLC_OCTETS) < 0) {
561 dev_warn(cs->dev, "RING ignored - bad HLC %s\n",
562 at_state->str_var[STR_ZHLC]);
563 return ICALL_IGNORE;
564 }
565 iif->hcmsg.HLC = iif->hlc_buf;
566 msgsize += iif->hcmsg.HLC[0];
567
568 /* look up corresponding CIP value */
569 /* keep BC based CIP value if none found */
570 if (at_state->str_var[STR_ZBC])
571 for (i = 0; i < ARRAY_SIZE(cip2bchlc); i++)
572 if (cip2bchlc[i].hlc != NULL &&
573 !strcmp(cip2bchlc[i].hlc,
574 at_state->str_var[STR_ZHLC]) &&
575 !strcmp(cip2bchlc[i].bc,
576 at_state->str_var[STR_ZBC])) {
577 iif->hcmsg.CIPValue = i;
578 break;
579 }
580 }
581
582 /* Called Party Number (optional) */
583 if (at_state->str_var[STR_ZCPN]) {
584 i = strlen(at_state->str_var[STR_ZCPN]);
585 if (i > MAX_NUMBER_DIGITS) {
586 dev_warn(cs->dev, "RING ignored - bad number %s\n",
587 at_state->str_var[STR_ZBC]);
588 return ICALL_IGNORE;
589 }
590 iif->cdpty_buf[0] = i + 1;
591 iif->cdpty_buf[1] = 0x80; /* type / numbering plan unknown */
592 memcpy(iif->cdpty_buf+2, at_state->str_var[STR_ZCPN], i);
593 iif->hcmsg.CalledPartyNumber = iif->cdpty_buf;
594 msgsize += iif->hcmsg.CalledPartyNumber[0];
595 }
596
597 /* Calling Party Number (optional) */
598 if (at_state->str_var[STR_NMBR]) {
599 i = strlen(at_state->str_var[STR_NMBR]);
600 if (i > MAX_NUMBER_DIGITS) {
601 dev_warn(cs->dev, "RING ignored - bad number %s\n",
602 at_state->str_var[STR_ZBC]);
603 return ICALL_IGNORE;
604 }
605 iif->cgpty_buf[0] = i + 2;
606 iif->cgpty_buf[1] = 0x00; /* type / numbering plan unknown */
607 iif->cgpty_buf[2] = 0x80; /* pres. allowed, not screened */
608 memcpy(iif->cgpty_buf+3, at_state->str_var[STR_NMBR], i);
609 iif->hcmsg.CallingPartyNumber = iif->cgpty_buf;
610 msgsize += iif->hcmsg.CallingPartyNumber[0];
611 }
612
613 /* remaining parameters (not supported, always left NULL):
614 * - CalledPartySubaddress
615 * - CallingPartySubaddress
616 * - AdditionalInfo
617 * - BChannelinformation
618 * - Keypadfacility
619 * - Useruserdata
620 * - Facilitydataarray
621 */
622
623 gig_dbg(DEBUG_CMD, "icall: PLCI %x CIP %d BC %s",
624 iif->hcmsg.adr.adrPLCI, iif->hcmsg.CIPValue,
625 format_ie(iif->hcmsg.BC));
626 gig_dbg(DEBUG_CMD, "icall: HLC %s",
627 format_ie(iif->hcmsg.HLC));
628 gig_dbg(DEBUG_CMD, "icall: CgPty %s",
629 format_ie(iif->hcmsg.CallingPartyNumber));
630 gig_dbg(DEBUG_CMD, "icall: CdPty %s",
631 format_ie(iif->hcmsg.CalledPartyNumber));
632
633 /* scan application list for matching listeners */
634 spin_lock_irqsave(&bcs->aplock, flags);
635 if (bcs->ap != NULL || bcs->apconnstate != APCONN_NONE) {
636 dev_warn(cs->dev, "%s: channel not properly cleared (%p/%d)\n",
637 __func__, bcs->ap, bcs->apconnstate);
638 bcs->ap = NULL;
639 bcs->apconnstate = APCONN_NONE;
640 }
641 spin_unlock_irqrestore(&bcs->aplock, flags);
642 actCIPmask = 1 | (1 << iif->hcmsg.CIPValue);
643 list_for_each_entry(ap, &iif->appls, ctrlist)
644 if (actCIPmask & ap->listenCIPmask) {
645 /* build CONNECT_IND message for this application */
646 iif->hcmsg.ApplId = ap->id;
647 iif->hcmsg.Messagenumber = ap->nextMessageNumber++;
648
649 skb = alloc_skb(msgsize, GFP_ATOMIC);
650 if (!skb) {
651 dev_err(cs->dev, "%s: out of memory\n",
652 __func__);
653 break;
654 }
655 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
656 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
657
658 /* add to listeners on this B channel, update state */
659 spin_lock_irqsave(&bcs->aplock, flags);
660 ap->bcnext = bcs->ap;
661 bcs->ap = ap;
662 bcs->chstate |= CHS_NOTIFY_LL;
663 bcs->apconnstate = APCONN_SETUP;
664 spin_unlock_irqrestore(&bcs->aplock, flags);
665
666 /* emit message */
667 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
668 }
669
670 /*
671 * Return "accept" if any listeners.
672 * Gigaset will send ALERTING.
673 * There doesn't seem to be a way to avoid this.
674 */
675 return bcs->ap ? ICALL_ACCEPT : ICALL_IGNORE;
676 }
677
678 /*
679 * send a DISCONNECT_IND message to an application
680 * does not sleep, clobbers the controller's hcmsg structure
681 */
send_disconnect_ind(struct bc_state * bcs,struct gigaset_capi_appl * ap,u16 reason)682 static void send_disconnect_ind(struct bc_state *bcs,
683 struct gigaset_capi_appl *ap, u16 reason)
684 {
685 struct cardstate *cs = bcs->cs;
686 struct gigaset_capi_ctr *iif = cs->iif;
687 struct sk_buff *skb;
688
689 if (bcs->apconnstate == APCONN_NONE)
690 return;
691
692 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT, CAPI_IND,
693 ap->nextMessageNumber++,
694 iif->ctr.cnr | ((bcs->channel + 1) << 8));
695 iif->hcmsg.Reason = reason;
696 skb = alloc_skb(CAPI_DISCONNECT_IND_LEN, GFP_ATOMIC);
697 if (!skb) {
698 dev_err(cs->dev, "%s: out of memory\n", __func__);
699 return;
700 }
701 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, CAPI_DISCONNECT_IND_LEN));
702 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
703 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
704 }
705
706 /*
707 * send a DISCONNECT_B3_IND message to an application
708 * Parameters: NCCI = 1, NCPI empty, Reason_B3 = 0
709 * does not sleep, clobbers the controller's hcmsg structure
710 */
send_disconnect_b3_ind(struct bc_state * bcs,struct gigaset_capi_appl * ap)711 static void send_disconnect_b3_ind(struct bc_state *bcs,
712 struct gigaset_capi_appl *ap)
713 {
714 struct cardstate *cs = bcs->cs;
715 struct gigaset_capi_ctr *iif = cs->iif;
716 struct sk_buff *skb;
717
718 /* nothing to do if no logical connection active */
719 if (bcs->apconnstate < APCONN_ACTIVE)
720 return;
721 bcs->apconnstate = APCONN_SETUP;
722
723 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
724 ap->nextMessageNumber++,
725 iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
726 skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_ATOMIC);
727 if (!skb) {
728 dev_err(cs->dev, "%s: out of memory\n", __func__);
729 return;
730 }
731 capi_cmsg2message(&iif->hcmsg,
732 __skb_put(skb, CAPI_DISCONNECT_B3_IND_BASELEN));
733 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
734 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
735 }
736
737 /**
738 * gigaset_isdn_connD() - signal D channel connect
739 * @bcs: B channel descriptor structure.
740 *
741 * Called by main module at tasklet level to notify the LL that the D channel
742 * connection has been established.
743 */
gigaset_isdn_connD(struct bc_state * bcs)744 void gigaset_isdn_connD(struct bc_state *bcs)
745 {
746 struct cardstate *cs = bcs->cs;
747 struct gigaset_capi_ctr *iif = cs->iif;
748 struct gigaset_capi_appl *ap;
749 struct sk_buff *skb;
750 unsigned int msgsize;
751 unsigned long flags;
752
753 spin_lock_irqsave(&bcs->aplock, flags);
754 ap = bcs->ap;
755 if (!ap) {
756 spin_unlock_irqrestore(&bcs->aplock, flags);
757 gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
758 return;
759 }
760 if (bcs->apconnstate == APCONN_NONE) {
761 spin_unlock_irqrestore(&bcs->aplock, flags);
762 dev_warn(cs->dev, "%s: application %u not connected\n",
763 __func__, ap->id);
764 return;
765 }
766 spin_unlock_irqrestore(&bcs->aplock, flags);
767 while (ap->bcnext) {
768 /* this should never happen */
769 dev_warn(cs->dev, "%s: dropping extra application %u\n",
770 __func__, ap->bcnext->id);
771 send_disconnect_ind(bcs, ap->bcnext,
772 CapiCallGivenToOtherApplication);
773 ap->bcnext = ap->bcnext->bcnext;
774 }
775
776 /* prepare CONNECT_ACTIVE_IND message
777 * Note: LLC not supported by device
778 */
779 capi_cmsg_header(&iif->hcmsg, ap->id, CAPI_CONNECT_ACTIVE, CAPI_IND,
780 ap->nextMessageNumber++,
781 iif->ctr.cnr | ((bcs->channel + 1) << 8));
782
783 /* minimum size, all structs empty */
784 msgsize = CAPI_CONNECT_ACTIVE_IND_BASELEN;
785
786 /* ToDo: set parameter: Connected number
787 * (requires ev-layer state machine extension to collect
788 * ZCON device reply)
789 */
790
791 /* build and emit CONNECT_ACTIVE_IND message */
792 skb = alloc_skb(msgsize, GFP_ATOMIC);
793 if (!skb) {
794 dev_err(cs->dev, "%s: out of memory\n", __func__);
795 return;
796 }
797 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
798 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
799 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
800 }
801
802 /**
803 * gigaset_isdn_hupD() - signal D channel hangup
804 * @bcs: B channel descriptor structure.
805 *
806 * Called by main module at tasklet level to notify the LL that the D channel
807 * connection has been shut down.
808 */
gigaset_isdn_hupD(struct bc_state * bcs)809 void gigaset_isdn_hupD(struct bc_state *bcs)
810 {
811 struct gigaset_capi_appl *ap;
812 unsigned long flags;
813
814 /*
815 * ToDo: pass on reason code reported by device
816 * (requires ev-layer state machine extension to collect
817 * ZCAU device reply)
818 */
819 spin_lock_irqsave(&bcs->aplock, flags);
820 while (bcs->ap != NULL) {
821 ap = bcs->ap;
822 bcs->ap = ap->bcnext;
823 spin_unlock_irqrestore(&bcs->aplock, flags);
824 send_disconnect_b3_ind(bcs, ap);
825 send_disconnect_ind(bcs, ap, 0);
826 spin_lock_irqsave(&bcs->aplock, flags);
827 }
828 bcs->apconnstate = APCONN_NONE;
829 spin_unlock_irqrestore(&bcs->aplock, flags);
830 }
831
832 /**
833 * gigaset_isdn_connB() - signal B channel connect
834 * @bcs: B channel descriptor structure.
835 *
836 * Called by main module at tasklet level to notify the LL that the B channel
837 * connection has been established.
838 */
gigaset_isdn_connB(struct bc_state * bcs)839 void gigaset_isdn_connB(struct bc_state *bcs)
840 {
841 struct cardstate *cs = bcs->cs;
842 struct gigaset_capi_ctr *iif = cs->iif;
843 struct gigaset_capi_appl *ap;
844 struct sk_buff *skb;
845 unsigned long flags;
846 unsigned int msgsize;
847 u8 command;
848
849 spin_lock_irqsave(&bcs->aplock, flags);
850 ap = bcs->ap;
851 if (!ap) {
852 spin_unlock_irqrestore(&bcs->aplock, flags);
853 gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
854 return;
855 }
856 if (!bcs->apconnstate) {
857 spin_unlock_irqrestore(&bcs->aplock, flags);
858 dev_warn(cs->dev, "%s: application %u not connected\n",
859 __func__, ap->id);
860 return;
861 }
862
863 /*
864 * emit CONNECT_B3_ACTIVE_IND if we already got CONNECT_B3_REQ;
865 * otherwise we have to emit CONNECT_B3_IND first, and follow up with
866 * CONNECT_B3_ACTIVE_IND in reply to CONNECT_B3_RESP
867 * Parameters in both cases always: NCCI = 1, NCPI empty
868 */
869 if (bcs->apconnstate >= APCONN_ACTIVE) {
870 command = CAPI_CONNECT_B3_ACTIVE;
871 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
872 } else {
873 command = CAPI_CONNECT_B3;
874 msgsize = CAPI_CONNECT_B3_IND_BASELEN;
875 }
876 bcs->apconnstate = APCONN_ACTIVE;
877
878 spin_unlock_irqrestore(&bcs->aplock, flags);
879
880 while (ap->bcnext) {
881 /* this should never happen */
882 dev_warn(cs->dev, "%s: dropping extra application %u\n",
883 __func__, ap->bcnext->id);
884 send_disconnect_ind(bcs, ap->bcnext,
885 CapiCallGivenToOtherApplication);
886 ap->bcnext = ap->bcnext->bcnext;
887 }
888
889 capi_cmsg_header(&iif->hcmsg, ap->id, command, CAPI_IND,
890 ap->nextMessageNumber++,
891 iif->ctr.cnr | ((bcs->channel + 1) << 8) | (1 << 16));
892 skb = alloc_skb(msgsize, GFP_ATOMIC);
893 if (!skb) {
894 dev_err(cs->dev, "%s: out of memory\n", __func__);
895 return;
896 }
897 capi_cmsg2message(&iif->hcmsg, __skb_put(skb, msgsize));
898 dump_cmsg(DEBUG_CMD, __func__, &iif->hcmsg);
899 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
900 }
901
902 /**
903 * gigaset_isdn_hupB() - signal B channel hangup
904 * @bcs: B channel descriptor structure.
905 *
906 * Called by main module to notify the LL that the B channel connection has
907 * been shut down.
908 */
gigaset_isdn_hupB(struct bc_state * bcs)909 void gigaset_isdn_hupB(struct bc_state *bcs)
910 {
911 struct gigaset_capi_appl *ap = bcs->ap;
912
913 /* ToDo: assure order of DISCONNECT_B3_IND and DISCONNECT_IND ? */
914
915 if (!ap) {
916 gig_dbg(DEBUG_CMD, "%s: application gone", __func__);
917 return;
918 }
919
920 send_disconnect_b3_ind(bcs, ap);
921 }
922
923 /**
924 * gigaset_isdn_start() - signal device availability
925 * @cs: device descriptor structure.
926 *
927 * Called by main module to notify the LL that the device is available for
928 * use.
929 */
gigaset_isdn_start(struct cardstate * cs)930 void gigaset_isdn_start(struct cardstate *cs)
931 {
932 struct gigaset_capi_ctr *iif = cs->iif;
933
934 /* fill profile data: manufacturer name */
935 strcpy(iif->ctr.manu, "Siemens");
936 /* CAPI and device version */
937 iif->ctr.version.majorversion = 2; /* CAPI 2.0 */
938 iif->ctr.version.minorversion = 0;
939 /* ToDo: check/assert cs->gotfwver? */
940 iif->ctr.version.majormanuversion = cs->fwver[0];
941 iif->ctr.version.minormanuversion = cs->fwver[1];
942 /* number of B channels supported */
943 iif->ctr.profile.nbchannel = cs->channels;
944 /* global options: internal controller, supplementary services */
945 iif->ctr.profile.goptions = 0x11;
946 /* B1 protocols: 64 kbit/s HDLC or transparent */
947 iif->ctr.profile.support1 = 0x03;
948 /* B2 protocols: transparent only */
949 /* ToDo: X.75 SLP ? */
950 iif->ctr.profile.support2 = 0x02;
951 /* B3 protocols: transparent only */
952 iif->ctr.profile.support3 = 0x01;
953 /* no serial number */
954 strcpy(iif->ctr.serial, "0");
955 capi_ctr_ready(&iif->ctr);
956 }
957
958 /**
959 * gigaset_isdn_stop() - signal device unavailability
960 * @cs: device descriptor structure.
961 *
962 * Called by main module to notify the LL that the device is no longer
963 * available for use.
964 */
gigaset_isdn_stop(struct cardstate * cs)965 void gigaset_isdn_stop(struct cardstate *cs)
966 {
967 struct gigaset_capi_ctr *iif = cs->iif;
968 capi_ctr_down(&iif->ctr);
969 }
970
971 /*
972 * kernel CAPI callback methods
973 * ============================
974 */
975
976 /*
977 * register CAPI application
978 */
gigaset_register_appl(struct capi_ctr * ctr,u16 appl,capi_register_params * rp)979 static void gigaset_register_appl(struct capi_ctr *ctr, u16 appl,
980 capi_register_params *rp)
981 {
982 struct gigaset_capi_ctr *iif
983 = container_of(ctr, struct gigaset_capi_ctr, ctr);
984 struct cardstate *cs = ctr->driverdata;
985 struct gigaset_capi_appl *ap;
986
987 gig_dbg(DEBUG_CMD, "%s [%u] l3cnt=%u blkcnt=%u blklen=%u",
988 __func__, appl, rp->level3cnt, rp->datablkcnt, rp->datablklen);
989
990 list_for_each_entry(ap, &iif->appls, ctrlist)
991 if (ap->id == appl) {
992 dev_notice(cs->dev,
993 "application %u already registered\n", appl);
994 return;
995 }
996
997 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
998 if (!ap) {
999 dev_err(cs->dev, "%s: out of memory\n", __func__);
1000 return;
1001 }
1002 ap->id = appl;
1003 ap->rp = *rp;
1004
1005 list_add(&ap->ctrlist, &iif->appls);
1006 dev_info(cs->dev, "application %u registered\n", ap->id);
1007 }
1008
1009 /*
1010 * remove CAPI application from channel
1011 * helper function to keep indentation levels down and stay in 80 columns
1012 */
1013
remove_appl_from_channel(struct bc_state * bcs,struct gigaset_capi_appl * ap)1014 static inline void remove_appl_from_channel(struct bc_state *bcs,
1015 struct gigaset_capi_appl *ap)
1016 {
1017 struct cardstate *cs = bcs->cs;
1018 struct gigaset_capi_appl *bcap;
1019 unsigned long flags;
1020 int prevconnstate;
1021
1022 spin_lock_irqsave(&bcs->aplock, flags);
1023 bcap = bcs->ap;
1024 if (bcap == NULL) {
1025 spin_unlock_irqrestore(&bcs->aplock, flags);
1026 return;
1027 }
1028
1029 /* check first application on channel */
1030 if (bcap == ap) {
1031 bcs->ap = ap->bcnext;
1032 if (bcs->ap != NULL) {
1033 spin_unlock_irqrestore(&bcs->aplock, flags);
1034 return;
1035 }
1036
1037 /* none left, clear channel state */
1038 prevconnstate = bcs->apconnstate;
1039 bcs->apconnstate = APCONN_NONE;
1040 spin_unlock_irqrestore(&bcs->aplock, flags);
1041
1042 if (prevconnstate == APCONN_ACTIVE) {
1043 dev_notice(cs->dev, "%s: hanging up channel %u\n",
1044 __func__, bcs->channel);
1045 gigaset_add_event(cs, &bcs->at_state,
1046 EV_HUP, NULL, 0, NULL);
1047 gigaset_schedule_event(cs);
1048 }
1049 return;
1050 }
1051
1052 /* check remaining list */
1053 do {
1054 if (bcap->bcnext == ap) {
1055 bcap->bcnext = bcap->bcnext->bcnext;
1056 spin_unlock_irqrestore(&bcs->aplock, flags);
1057 return;
1058 }
1059 bcap = bcap->bcnext;
1060 } while (bcap != NULL);
1061 spin_unlock_irqrestore(&bcs->aplock, flags);
1062 }
1063
1064 /*
1065 * release CAPI application
1066 */
gigaset_release_appl(struct capi_ctr * ctr,u16 appl)1067 static void gigaset_release_appl(struct capi_ctr *ctr, u16 appl)
1068 {
1069 struct gigaset_capi_ctr *iif
1070 = container_of(ctr, struct gigaset_capi_ctr, ctr);
1071 struct cardstate *cs = iif->ctr.driverdata;
1072 struct gigaset_capi_appl *ap, *tmp;
1073 unsigned ch;
1074
1075 gig_dbg(DEBUG_CMD, "%s [%u]", __func__, appl);
1076
1077 list_for_each_entry_safe(ap, tmp, &iif->appls, ctrlist)
1078 if (ap->id == appl) {
1079 /* remove from any channels */
1080 for (ch = 0; ch < cs->channels; ch++)
1081 remove_appl_from_channel(&cs->bcs[ch], ap);
1082
1083 /* remove from registration list */
1084 list_del(&ap->ctrlist);
1085 kfree(ap);
1086 dev_info(cs->dev, "application %u released\n", appl);
1087 }
1088 }
1089
1090 /*
1091 * =====================================================================
1092 * outgoing CAPI message handler
1093 * =====================================================================
1094 */
1095
1096 /*
1097 * helper function: emit reply message with given Info value
1098 */
send_conf(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb,u16 info)1099 static void send_conf(struct gigaset_capi_ctr *iif,
1100 struct gigaset_capi_appl *ap,
1101 struct sk_buff *skb,
1102 u16 info)
1103 {
1104 /*
1105 * _CONF replies always only have NCCI and Info parameters
1106 * so they'll fit into the _REQ message skb
1107 */
1108 capi_cmsg_answer(&iif->acmsg);
1109 iif->acmsg.Info = info;
1110 capi_cmsg2message(&iif->acmsg, skb->data);
1111 __skb_trim(skb, CAPI_STDCONF_LEN);
1112 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1113 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1114 }
1115
1116 /*
1117 * process FACILITY_REQ message
1118 */
do_facility_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1119 static void do_facility_req(struct gigaset_capi_ctr *iif,
1120 struct gigaset_capi_appl *ap,
1121 struct sk_buff *skb)
1122 {
1123 struct cardstate *cs = iif->ctr.driverdata;
1124 _cmsg *cmsg = &iif->acmsg;
1125 struct sk_buff *cskb;
1126 u8 *pparam;
1127 unsigned int msgsize = CAPI_FACILITY_CONF_BASELEN;
1128 u16 function, info;
1129 static u8 confparam[10]; /* max. 9 octets + length byte */
1130
1131 /* decode message */
1132 capi_message2cmsg(cmsg, skb->data);
1133 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1134
1135 /*
1136 * Facility Request Parameter is not decoded by capi_message2cmsg()
1137 * encoding depends on Facility Selector
1138 */
1139 switch (cmsg->FacilitySelector) {
1140 case CAPI_FACILITY_DTMF: /* ToDo */
1141 info = CapiFacilityNotSupported;
1142 confparam[0] = 2; /* length */
1143 /* DTMF information: Unknown DTMF request */
1144 capimsg_setu16(confparam, 1, 2);
1145 break;
1146
1147 case CAPI_FACILITY_V42BIS: /* not supported */
1148 info = CapiFacilityNotSupported;
1149 confparam[0] = 2; /* length */
1150 /* V.42 bis information: not available */
1151 capimsg_setu16(confparam, 1, 1);
1152 break;
1153
1154 case CAPI_FACILITY_SUPPSVC:
1155 /* decode Function parameter */
1156 pparam = cmsg->FacilityRequestParameter;
1157 if (pparam == NULL || pparam[0] < 2) {
1158 dev_notice(cs->dev, "%s: %s missing\n", "FACILITY_REQ",
1159 "Facility Request Parameter");
1160 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
1161 return;
1162 }
1163 function = CAPIMSG_U16(pparam, 1);
1164 switch (function) {
1165 case CAPI_SUPPSVC_GETSUPPORTED:
1166 info = CapiSuccess;
1167 /* Supplementary Service specific parameter */
1168 confparam[3] = 6; /* length */
1169 /* Supplementary services info: Success */
1170 capimsg_setu16(confparam, 4, CapiSuccess);
1171 /* Supported Services: none */
1172 capimsg_setu32(confparam, 6, 0);
1173 break;
1174 case CAPI_SUPPSVC_LISTEN:
1175 if (pparam[0] < 7 || pparam[3] < 4) {
1176 dev_notice(cs->dev, "%s: %s missing\n",
1177 "FACILITY_REQ", "Notification Mask");
1178 send_conf(iif, ap, skb,
1179 CapiIllMessageParmCoding);
1180 return;
1181 }
1182 if (CAPIMSG_U32(pparam, 4) != 0) {
1183 dev_notice(cs->dev,
1184 "%s: unsupported supplementary service notification mask 0x%x\n",
1185 "FACILITY_REQ", CAPIMSG_U32(pparam, 4));
1186 info = CapiFacilitySpecificFunctionNotSupported;
1187 confparam[3] = 2; /* length */
1188 capimsg_setu16(confparam, 4,
1189 CapiSupplementaryServiceNotSupported);
1190 }
1191 info = CapiSuccess;
1192 confparam[3] = 2; /* length */
1193 capimsg_setu16(confparam, 4, CapiSuccess);
1194 break;
1195 /* ToDo: add supported services */
1196 default:
1197 dev_notice(cs->dev,
1198 "%s: unsupported supplementary service function 0x%04x\n",
1199 "FACILITY_REQ", function);
1200 info = CapiFacilitySpecificFunctionNotSupported;
1201 /* Supplementary Service specific parameter */
1202 confparam[3] = 2; /* length */
1203 /* Supplementary services info: not supported */
1204 capimsg_setu16(confparam, 4,
1205 CapiSupplementaryServiceNotSupported);
1206 }
1207
1208 /* Facility confirmation parameter */
1209 confparam[0] = confparam[3] + 3; /* total length */
1210 /* Function: copy from _REQ message */
1211 capimsg_setu16(confparam, 1, function);
1212 /* Supplementary Service specific parameter already set above */
1213 break;
1214
1215 case CAPI_FACILITY_WAKEUP: /* ToDo */
1216 info = CapiFacilityNotSupported;
1217 confparam[0] = 2; /* length */
1218 /* Number of accepted awake request parameters: 0 */
1219 capimsg_setu16(confparam, 1, 0);
1220 break;
1221
1222 default:
1223 info = CapiFacilityNotSupported;
1224 confparam[0] = 0; /* empty struct */
1225 }
1226
1227 /* send FACILITY_CONF with given Info and confirmation parameter */
1228 capi_cmsg_answer(cmsg);
1229 cmsg->Info = info;
1230 cmsg->FacilityConfirmationParameter = confparam;
1231 msgsize += confparam[0]; /* length */
1232 cskb = alloc_skb(msgsize, GFP_ATOMIC);
1233 if (!cskb) {
1234 dev_err(cs->dev, "%s: out of memory\n", __func__);
1235 return;
1236 }
1237 capi_cmsg2message(cmsg, __skb_put(cskb, msgsize));
1238 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1239 capi_ctr_handle_message(&iif->ctr, ap->id, cskb);
1240 }
1241
1242
1243 /*
1244 * process LISTEN_REQ message
1245 * just store the masks in the application data structure
1246 */
do_listen_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1247 static void do_listen_req(struct gigaset_capi_ctr *iif,
1248 struct gigaset_capi_appl *ap,
1249 struct sk_buff *skb)
1250 {
1251 /* decode message */
1252 capi_message2cmsg(&iif->acmsg, skb->data);
1253 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1254
1255 /* store listening parameters */
1256 ap->listenInfoMask = iif->acmsg.InfoMask;
1257 ap->listenCIPmask = iif->acmsg.CIPmask;
1258 send_conf(iif, ap, skb, CapiSuccess);
1259 }
1260
1261 /*
1262 * process ALERT_REQ message
1263 * nothing to do, Gigaset always alerts anyway
1264 */
do_alert_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1265 static void do_alert_req(struct gigaset_capi_ctr *iif,
1266 struct gigaset_capi_appl *ap,
1267 struct sk_buff *skb)
1268 {
1269 /* decode message */
1270 capi_message2cmsg(&iif->acmsg, skb->data);
1271 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
1272 send_conf(iif, ap, skb, CapiAlertAlreadySent);
1273 }
1274
1275 /*
1276 * process CONNECT_REQ message
1277 * allocate a B channel, prepare dial commands, queue a DIAL event,
1278 * emit CONNECT_CONF reply
1279 */
do_connect_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1280 static void do_connect_req(struct gigaset_capi_ctr *iif,
1281 struct gigaset_capi_appl *ap,
1282 struct sk_buff *skb)
1283 {
1284 struct cardstate *cs = iif->ctr.driverdata;
1285 _cmsg *cmsg = &iif->acmsg;
1286 struct bc_state *bcs;
1287 char **commands;
1288 char *s;
1289 u8 *pp;
1290 unsigned long flags;
1291 int i, l, lbc, lhlc;
1292 u16 info;
1293
1294 /* decode message */
1295 capi_message2cmsg(cmsg, skb->data);
1296 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1297
1298 /* get free B channel & construct PLCI */
1299 bcs = gigaset_get_free_channel(cs);
1300 if (!bcs) {
1301 dev_notice(cs->dev, "%s: no B channel available\n",
1302 "CONNECT_REQ");
1303 send_conf(iif, ap, skb, CapiNoPlciAvailable);
1304 return;
1305 }
1306 spin_lock_irqsave(&bcs->aplock, flags);
1307 if (bcs->ap != NULL || bcs->apconnstate != APCONN_NONE)
1308 dev_warn(cs->dev, "%s: channel not properly cleared (%p/%d)\n",
1309 __func__, bcs->ap, bcs->apconnstate);
1310 ap->bcnext = NULL;
1311 bcs->ap = ap;
1312 bcs->apconnstate = APCONN_SETUP;
1313 spin_unlock_irqrestore(&bcs->aplock, flags);
1314
1315 bcs->rx_bufsize = ap->rp.datablklen;
1316 dev_kfree_skb(bcs->rx_skb);
1317 gigaset_new_rx_skb(bcs);
1318 cmsg->adr.adrPLCI |= (bcs->channel + 1) << 8;
1319
1320 /* build command table */
1321 commands = kzalloc(AT_NUM*(sizeof *commands), GFP_KERNEL);
1322 if (!commands)
1323 goto oom;
1324
1325 /* encode parameter: Called party number */
1326 pp = cmsg->CalledPartyNumber;
1327 if (pp == NULL || *pp == 0) {
1328 dev_notice(cs->dev, "%s: %s missing\n",
1329 "CONNECT_REQ", "Called party number");
1330 info = CapiIllMessageParmCoding;
1331 goto error;
1332 }
1333 l = *pp++;
1334 /* check type of number/numbering plan byte */
1335 switch (*pp) {
1336 case 0x80: /* unknown type / unknown numbering plan */
1337 case 0x81: /* unknown type / ISDN/Telephony numbering plan */
1338 break;
1339 default: /* others: warn about potential misinterpretation */
1340 dev_notice(cs->dev, "%s: %s type/plan 0x%02x unsupported\n",
1341 "CONNECT_REQ", "Called party number", *pp);
1342 }
1343 pp++;
1344 l--;
1345 /* translate "**" internal call prefix to CTP value */
1346 if (l >= 2 && pp[0] == '*' && pp[1] == '*') {
1347 s = "^SCTP=0\r";
1348 pp += 2;
1349 l -= 2;
1350 } else {
1351 s = "^SCTP=1\r";
1352 }
1353 commands[AT_TYPE] = kstrdup(s, GFP_KERNEL);
1354 if (!commands[AT_TYPE])
1355 goto oom;
1356 commands[AT_DIAL] = kmalloc(l+3, GFP_KERNEL);
1357 if (!commands[AT_DIAL])
1358 goto oom;
1359 snprintf(commands[AT_DIAL], l+3, "D%.*s\r", l, pp);
1360
1361 /* encode parameter: Calling party number */
1362 pp = cmsg->CallingPartyNumber;
1363 if (pp != NULL && *pp > 0) {
1364 l = *pp++;
1365
1366 /* check type of number/numbering plan byte */
1367 /* ToDo: allow for/handle Ext=1? */
1368 switch (*pp) {
1369 case 0x00: /* unknown type / unknown numbering plan */
1370 case 0x01: /* unknown type / ISDN/Telephony num. plan */
1371 break;
1372 default:
1373 dev_notice(cs->dev,
1374 "%s: %s type/plan 0x%02x unsupported\n",
1375 "CONNECT_REQ", "Calling party number", *pp);
1376 }
1377 pp++;
1378 l--;
1379
1380 /* check presentation indicator */
1381 if (!l) {
1382 dev_notice(cs->dev, "%s: %s IE truncated\n",
1383 "CONNECT_REQ", "Calling party number");
1384 info = CapiIllMessageParmCoding;
1385 goto error;
1386 }
1387 switch (*pp & 0xfc) { /* ignore Screening indicator */
1388 case 0x80: /* Presentation allowed */
1389 s = "^SCLIP=1\r";
1390 break;
1391 case 0xa0: /* Presentation restricted */
1392 s = "^SCLIP=0\r";
1393 break;
1394 default:
1395 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1396 "CONNECT_REQ",
1397 "Presentation/Screening indicator",
1398 *pp);
1399 s = "^SCLIP=1\r";
1400 }
1401 commands[AT_CLIP] = kstrdup(s, GFP_KERNEL);
1402 if (!commands[AT_CLIP])
1403 goto oom;
1404 pp++;
1405 l--;
1406
1407 if (l) {
1408 /* number */
1409 commands[AT_MSN] = kmalloc(l+8, GFP_KERNEL);
1410 if (!commands[AT_MSN])
1411 goto oom;
1412 snprintf(commands[AT_MSN], l+8, "^SMSN=%*s\r", l, pp);
1413 }
1414 }
1415
1416 /* check parameter: CIP Value */
1417 if (cmsg->CIPValue >= ARRAY_SIZE(cip2bchlc) ||
1418 (cmsg->CIPValue > 0 && cip2bchlc[cmsg->CIPValue].bc == NULL)) {
1419 dev_notice(cs->dev, "%s: unknown CIP value %d\n",
1420 "CONNECT_REQ", cmsg->CIPValue);
1421 info = CapiCipValueUnknown;
1422 goto error;
1423 }
1424
1425 /*
1426 * check/encode parameters: BC & HLC
1427 * must be encoded together as device doesn't accept HLC separately
1428 * explicit parameters override values derived from CIP
1429 */
1430
1431 /* determine lengths */
1432 if (cmsg->BC && cmsg->BC[0]) /* BC specified explicitly */
1433 lbc = 2*cmsg->BC[0];
1434 else if (cip2bchlc[cmsg->CIPValue].bc) /* BC derived from CIP */
1435 lbc = strlen(cip2bchlc[cmsg->CIPValue].bc);
1436 else /* no BC */
1437 lbc = 0;
1438 if (cmsg->HLC && cmsg->HLC[0]) /* HLC specified explicitly */
1439 lhlc = 2*cmsg->HLC[0];
1440 else if (cip2bchlc[cmsg->CIPValue].hlc) /* HLC derived from CIP */
1441 lhlc = strlen(cip2bchlc[cmsg->CIPValue].hlc);
1442 else /* no HLC */
1443 lhlc = 0;
1444
1445 if (lbc) {
1446 /* have BC: allocate and assemble command string */
1447 l = lbc + 7; /* "^SBC=" + value + "\r" + null byte */
1448 if (lhlc)
1449 l += lhlc + 7; /* ";^SHLC=" + value */
1450 commands[AT_BC] = kmalloc(l, GFP_KERNEL);
1451 if (!commands[AT_BC])
1452 goto oom;
1453 strcpy(commands[AT_BC], "^SBC=");
1454 if (cmsg->BC && cmsg->BC[0]) /* BC specified explicitly */
1455 decode_ie(cmsg->BC, commands[AT_BC] + 5);
1456 else /* BC derived from CIP */
1457 strcpy(commands[AT_BC] + 5,
1458 cip2bchlc[cmsg->CIPValue].bc);
1459 if (lhlc) {
1460 strcpy(commands[AT_BC] + lbc + 5, ";^SHLC=");
1461 if (cmsg->HLC && cmsg->HLC[0])
1462 /* HLC specified explicitly */
1463 decode_ie(cmsg->HLC,
1464 commands[AT_BC] + lbc + 12);
1465 else /* HLC derived from CIP */
1466 strcpy(commands[AT_BC] + lbc + 12,
1467 cip2bchlc[cmsg->CIPValue].hlc);
1468 }
1469 strcpy(commands[AT_BC] + l - 2, "\r");
1470 } else {
1471 /* no BC */
1472 if (lhlc) {
1473 dev_notice(cs->dev, "%s: cannot set HLC without BC\n",
1474 "CONNECT_REQ");
1475 info = CapiIllMessageParmCoding; /* ? */
1476 goto error;
1477 }
1478 }
1479
1480 /* check/encode parameter: B Protocol */
1481 if (cmsg->BProtocol == CAPI_DEFAULT) {
1482 bcs->proto2 = L2_HDLC;
1483 dev_warn(cs->dev,
1484 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1485 } else {
1486 switch (cmsg->B1protocol) {
1487 case 0:
1488 bcs->proto2 = L2_HDLC;
1489 break;
1490 case 1:
1491 bcs->proto2 = L2_VOICE;
1492 break;
1493 default:
1494 dev_warn(cs->dev,
1495 "B1 Protocol %u unsupported, using Transparent\n",
1496 cmsg->B1protocol);
1497 bcs->proto2 = L2_VOICE;
1498 }
1499 if (cmsg->B2protocol != 1)
1500 dev_warn(cs->dev,
1501 "B2 Protocol %u unsupported, using Transparent\n",
1502 cmsg->B2protocol);
1503 if (cmsg->B3protocol != 0)
1504 dev_warn(cs->dev,
1505 "B3 Protocol %u unsupported, using Transparent\n",
1506 cmsg->B3protocol);
1507 ignore_cstruct_param(cs, cmsg->B1configuration,
1508 "CONNECT_REQ", "B1 Configuration");
1509 ignore_cstruct_param(cs, cmsg->B2configuration,
1510 "CONNECT_REQ", "B2 Configuration");
1511 ignore_cstruct_param(cs, cmsg->B3configuration,
1512 "CONNECT_REQ", "B3 Configuration");
1513 }
1514 commands[AT_PROTO] = kmalloc(9, GFP_KERNEL);
1515 if (!commands[AT_PROTO])
1516 goto oom;
1517 snprintf(commands[AT_PROTO], 9, "^SBPR=%u\r", bcs->proto2);
1518
1519 /* ToDo: check/encode remaining parameters */
1520 ignore_cstruct_param(cs, cmsg->CalledPartySubaddress,
1521 "CONNECT_REQ", "Called pty subaddr");
1522 ignore_cstruct_param(cs, cmsg->CallingPartySubaddress,
1523 "CONNECT_REQ", "Calling pty subaddr");
1524 ignore_cstruct_param(cs, cmsg->LLC,
1525 "CONNECT_REQ", "LLC");
1526 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1527 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1528 "CONNECT_REQ", "B Channel Information");
1529 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1530 "CONNECT_REQ", "Keypad Facility");
1531 ignore_cstruct_param(cs, cmsg->Useruserdata,
1532 "CONNECT_REQ", "User-User Data");
1533 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1534 "CONNECT_REQ", "Facility Data Array");
1535 }
1536
1537 /* encode parameter: B channel to use */
1538 commands[AT_ISO] = kmalloc(9, GFP_KERNEL);
1539 if (!commands[AT_ISO])
1540 goto oom;
1541 snprintf(commands[AT_ISO], 9, "^SISO=%u\r",
1542 (unsigned) bcs->channel + 1);
1543
1544 /* queue & schedule EV_DIAL event */
1545 if (!gigaset_add_event(cs, &bcs->at_state, EV_DIAL, commands,
1546 bcs->at_state.seq_index, NULL)) {
1547 info = CAPI_MSGOSRESOURCEERR;
1548 goto error;
1549 }
1550 gigaset_schedule_event(cs);
1551 send_conf(iif, ap, skb, CapiSuccess);
1552 return;
1553
1554 oom:
1555 dev_err(cs->dev, "%s: out of memory\n", __func__);
1556 info = CAPI_MSGOSRESOURCEERR;
1557 error:
1558 if (commands)
1559 for (i = 0; i < AT_NUM; i++)
1560 kfree(commands[i]);
1561 kfree(commands);
1562 gigaset_free_channel(bcs);
1563 send_conf(iif, ap, skb, info);
1564 }
1565
1566 /*
1567 * process CONNECT_RESP message
1568 * checks protocol parameters and queues an ACCEPT or HUP event
1569 */
do_connect_resp(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1570 static void do_connect_resp(struct gigaset_capi_ctr *iif,
1571 struct gigaset_capi_appl *ap,
1572 struct sk_buff *skb)
1573 {
1574 struct cardstate *cs = iif->ctr.driverdata;
1575 _cmsg *cmsg = &iif->acmsg;
1576 struct bc_state *bcs;
1577 struct gigaset_capi_appl *oap;
1578 unsigned long flags;
1579 int channel;
1580
1581 /* decode message */
1582 capi_message2cmsg(cmsg, skb->data);
1583 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1584 dev_kfree_skb_any(skb);
1585
1586 /* extract and check channel number from PLCI */
1587 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1588 if (!channel || channel > cs->channels) {
1589 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1590 "CONNECT_RESP", "PLCI", cmsg->adr.adrPLCI);
1591 return;
1592 }
1593 bcs = cs->bcs + channel - 1;
1594
1595 switch (cmsg->Reject) {
1596 case 0: /* Accept */
1597 /* drop all competing applications, keep only this one */
1598 spin_lock_irqsave(&bcs->aplock, flags);
1599 while (bcs->ap != NULL) {
1600 oap = bcs->ap;
1601 bcs->ap = oap->bcnext;
1602 if (oap != ap) {
1603 spin_unlock_irqrestore(&bcs->aplock, flags);
1604 send_disconnect_ind(bcs, oap,
1605 CapiCallGivenToOtherApplication);
1606 spin_lock_irqsave(&bcs->aplock, flags);
1607 }
1608 }
1609 ap->bcnext = NULL;
1610 bcs->ap = ap;
1611 spin_unlock_irqrestore(&bcs->aplock, flags);
1612
1613 bcs->rx_bufsize = ap->rp.datablklen;
1614 dev_kfree_skb(bcs->rx_skb);
1615 gigaset_new_rx_skb(bcs);
1616 bcs->chstate |= CHS_NOTIFY_LL;
1617
1618 /* check/encode B channel protocol */
1619 if (cmsg->BProtocol == CAPI_DEFAULT) {
1620 bcs->proto2 = L2_HDLC;
1621 dev_warn(cs->dev,
1622 "B2 Protocol X.75 SLP unsupported, using Transparent\n");
1623 } else {
1624 switch (cmsg->B1protocol) {
1625 case 0:
1626 bcs->proto2 = L2_HDLC;
1627 break;
1628 case 1:
1629 bcs->proto2 = L2_VOICE;
1630 break;
1631 default:
1632 dev_warn(cs->dev,
1633 "B1 Protocol %u unsupported, using Transparent\n",
1634 cmsg->B1protocol);
1635 bcs->proto2 = L2_VOICE;
1636 }
1637 if (cmsg->B2protocol != 1)
1638 dev_warn(cs->dev,
1639 "B2 Protocol %u unsupported, using Transparent\n",
1640 cmsg->B2protocol);
1641 if (cmsg->B3protocol != 0)
1642 dev_warn(cs->dev,
1643 "B3 Protocol %u unsupported, using Transparent\n",
1644 cmsg->B3protocol);
1645 ignore_cstruct_param(cs, cmsg->B1configuration,
1646 "CONNECT_RESP", "B1 Configuration");
1647 ignore_cstruct_param(cs, cmsg->B2configuration,
1648 "CONNECT_RESP", "B2 Configuration");
1649 ignore_cstruct_param(cs, cmsg->B3configuration,
1650 "CONNECT_RESP", "B3 Configuration");
1651 }
1652
1653 /* ToDo: check/encode remaining parameters */
1654 ignore_cstruct_param(cs, cmsg->ConnectedNumber,
1655 "CONNECT_RESP", "Connected Number");
1656 ignore_cstruct_param(cs, cmsg->ConnectedSubaddress,
1657 "CONNECT_RESP", "Connected Subaddress");
1658 ignore_cstruct_param(cs, cmsg->LLC,
1659 "CONNECT_RESP", "LLC");
1660 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1661 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1662 "CONNECT_RESP", "BChannel Information");
1663 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1664 "CONNECT_RESP", "Keypad Facility");
1665 ignore_cstruct_param(cs, cmsg->Useruserdata,
1666 "CONNECT_RESP", "User-User Data");
1667 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1668 "CONNECT_RESP", "Facility Data Array");
1669 }
1670
1671 /* Accept call */
1672 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1673 EV_ACCEPT, NULL, 0, NULL))
1674 return;
1675 gigaset_schedule_event(cs);
1676 return;
1677
1678 case 1: /* Ignore */
1679 /* send DISCONNECT_IND to this application */
1680 send_disconnect_ind(bcs, ap, 0);
1681
1682 /* remove it from the list of listening apps */
1683 spin_lock_irqsave(&bcs->aplock, flags);
1684 if (bcs->ap == ap) {
1685 bcs->ap = ap->bcnext;
1686 if (bcs->ap == NULL) {
1687 /* last one: stop ev-layer hupD notifications */
1688 bcs->apconnstate = APCONN_NONE;
1689 bcs->chstate &= ~CHS_NOTIFY_LL;
1690 }
1691 spin_unlock_irqrestore(&bcs->aplock, flags);
1692 return;
1693 }
1694 for (oap = bcs->ap; oap != NULL; oap = oap->bcnext) {
1695 if (oap->bcnext == ap) {
1696 oap->bcnext = oap->bcnext->bcnext;
1697 spin_unlock_irqrestore(&bcs->aplock, flags);
1698 return;
1699 }
1700 }
1701 spin_unlock_irqrestore(&bcs->aplock, flags);
1702 dev_err(cs->dev, "%s: application %u not found\n",
1703 __func__, ap->id);
1704 return;
1705
1706 default: /* Reject */
1707 /* drop all competing applications, keep only this one */
1708 spin_lock_irqsave(&bcs->aplock, flags);
1709 while (bcs->ap != NULL) {
1710 oap = bcs->ap;
1711 bcs->ap = oap->bcnext;
1712 if (oap != ap) {
1713 spin_unlock_irqrestore(&bcs->aplock, flags);
1714 send_disconnect_ind(bcs, oap,
1715 CapiCallGivenToOtherApplication);
1716 spin_lock_irqsave(&bcs->aplock, flags);
1717 }
1718 }
1719 ap->bcnext = NULL;
1720 bcs->ap = ap;
1721 spin_unlock_irqrestore(&bcs->aplock, flags);
1722
1723 /* reject call - will trigger DISCONNECT_IND for this app */
1724 dev_info(cs->dev, "%s: Reject=%x\n",
1725 "CONNECT_RESP", cmsg->Reject);
1726 if (!gigaset_add_event(cs, &cs->bcs[channel-1].at_state,
1727 EV_HUP, NULL, 0, NULL))
1728 return;
1729 gigaset_schedule_event(cs);
1730 return;
1731 }
1732 }
1733
1734 /*
1735 * process CONNECT_B3_REQ message
1736 * build NCCI and emit CONNECT_B3_CONF reply
1737 */
do_connect_b3_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1738 static void do_connect_b3_req(struct gigaset_capi_ctr *iif,
1739 struct gigaset_capi_appl *ap,
1740 struct sk_buff *skb)
1741 {
1742 struct cardstate *cs = iif->ctr.driverdata;
1743 _cmsg *cmsg = &iif->acmsg;
1744 struct bc_state *bcs;
1745 int channel;
1746
1747 /* decode message */
1748 capi_message2cmsg(cmsg, skb->data);
1749 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1750
1751 /* extract and check channel number from PLCI */
1752 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1753 if (!channel || channel > cs->channels) {
1754 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1755 "CONNECT_B3_REQ", "PLCI", cmsg->adr.adrPLCI);
1756 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1757 return;
1758 }
1759 bcs = &cs->bcs[channel-1];
1760
1761 /* mark logical connection active */
1762 bcs->apconnstate = APCONN_ACTIVE;
1763
1764 /* build NCCI: always 1 (one B3 connection only) */
1765 cmsg->adr.adrNCCI |= 1 << 16;
1766
1767 /* NCPI parameter: not applicable for B3 Transparent */
1768 ignore_cstruct_param(cs, cmsg->NCPI, "CONNECT_B3_REQ", "NCPI");
1769 send_conf(iif, ap, skb, (cmsg->NCPI && cmsg->NCPI[0]) ?
1770 CapiNcpiNotSupportedByProtocol : CapiSuccess);
1771 }
1772
1773 /*
1774 * process CONNECT_B3_RESP message
1775 * Depending on the Reject parameter, either emit CONNECT_B3_ACTIVE_IND
1776 * or queue EV_HUP and emit DISCONNECT_B3_IND.
1777 * The emitted message is always shorter than the received one,
1778 * allowing to reuse the skb.
1779 */
do_connect_b3_resp(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1780 static void do_connect_b3_resp(struct gigaset_capi_ctr *iif,
1781 struct gigaset_capi_appl *ap,
1782 struct sk_buff *skb)
1783 {
1784 struct cardstate *cs = iif->ctr.driverdata;
1785 _cmsg *cmsg = &iif->acmsg;
1786 struct bc_state *bcs;
1787 int channel;
1788 unsigned int msgsize;
1789 u8 command;
1790
1791 /* decode message */
1792 capi_message2cmsg(cmsg, skb->data);
1793 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1794
1795 /* extract and check channel number and NCCI */
1796 channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
1797 if (!channel || channel > cs->channels ||
1798 ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
1799 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1800 "CONNECT_B3_RESP", "NCCI", cmsg->adr.adrNCCI);
1801 dev_kfree_skb_any(skb);
1802 return;
1803 }
1804 bcs = &cs->bcs[channel-1];
1805
1806 if (cmsg->Reject) {
1807 /* Reject: clear B3 connect received flag */
1808 bcs->apconnstate = APCONN_SETUP;
1809
1810 /* trigger hangup, causing eventual DISCONNECT_IND */
1811 if (!gigaset_add_event(cs, &bcs->at_state,
1812 EV_HUP, NULL, 0, NULL)) {
1813 dev_kfree_skb_any(skb);
1814 return;
1815 }
1816 gigaset_schedule_event(cs);
1817
1818 /* emit DISCONNECT_B3_IND */
1819 command = CAPI_DISCONNECT_B3;
1820 msgsize = CAPI_DISCONNECT_B3_IND_BASELEN;
1821 } else {
1822 /*
1823 * Accept: emit CONNECT_B3_ACTIVE_IND immediately, as
1824 * we only send CONNECT_B3_IND if the B channel is up
1825 */
1826 command = CAPI_CONNECT_B3_ACTIVE;
1827 msgsize = CAPI_CONNECT_B3_ACTIVE_IND_BASELEN;
1828 }
1829 capi_cmsg_header(cmsg, ap->id, command, CAPI_IND,
1830 ap->nextMessageNumber++, cmsg->adr.adrNCCI);
1831 __skb_trim(skb, msgsize);
1832 capi_cmsg2message(cmsg, skb->data);
1833 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1834 capi_ctr_handle_message(&iif->ctr, ap->id, skb);
1835 }
1836
1837 /*
1838 * process DISCONNECT_REQ message
1839 * schedule EV_HUP and emit DISCONNECT_B3_IND if necessary,
1840 * emit DISCONNECT_CONF reply
1841 */
do_disconnect_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1842 static void do_disconnect_req(struct gigaset_capi_ctr *iif,
1843 struct gigaset_capi_appl *ap,
1844 struct sk_buff *skb)
1845 {
1846 struct cardstate *cs = iif->ctr.driverdata;
1847 _cmsg *cmsg = &iif->acmsg;
1848 struct bc_state *bcs;
1849 _cmsg *b3cmsg;
1850 struct sk_buff *b3skb;
1851 int channel;
1852
1853 /* decode message */
1854 capi_message2cmsg(cmsg, skb->data);
1855 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1856
1857 /* extract and check channel number from PLCI */
1858 channel = (cmsg->adr.adrPLCI >> 8) & 0xff;
1859 if (!channel || channel > cs->channels) {
1860 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1861 "DISCONNECT_REQ", "PLCI", cmsg->adr.adrPLCI);
1862 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1863 return;
1864 }
1865 bcs = cs->bcs + channel - 1;
1866
1867 /* ToDo: process parameter: Additional info */
1868 if (cmsg->AdditionalInfo != CAPI_DEFAULT) {
1869 ignore_cstruct_param(cs, cmsg->BChannelinformation,
1870 "DISCONNECT_REQ", "B Channel Information");
1871 ignore_cstruct_param(cs, cmsg->Keypadfacility,
1872 "DISCONNECT_REQ", "Keypad Facility");
1873 ignore_cstruct_param(cs, cmsg->Useruserdata,
1874 "DISCONNECT_REQ", "User-User Data");
1875 ignore_cstruct_param(cs, cmsg->Facilitydataarray,
1876 "DISCONNECT_REQ", "Facility Data Array");
1877 }
1878
1879 /* skip if DISCONNECT_IND already sent */
1880 if (!bcs->apconnstate)
1881 return;
1882
1883 /* check for active logical connection */
1884 if (bcs->apconnstate >= APCONN_ACTIVE) {
1885 /*
1886 * emit DISCONNECT_B3_IND with cause 0x3301
1887 * use separate cmsg structure, as the content of iif->acmsg
1888 * is still needed for creating the _CONF message
1889 */
1890 b3cmsg = kmalloc(sizeof(*b3cmsg), GFP_KERNEL);
1891 if (!b3cmsg) {
1892 dev_err(cs->dev, "%s: out of memory\n", __func__);
1893 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1894 return;
1895 }
1896 capi_cmsg_header(b3cmsg, ap->id, CAPI_DISCONNECT_B3, CAPI_IND,
1897 ap->nextMessageNumber++,
1898 cmsg->adr.adrPLCI | (1 << 16));
1899 b3cmsg->Reason_B3 = CapiProtocolErrorLayer1;
1900 b3skb = alloc_skb(CAPI_DISCONNECT_B3_IND_BASELEN, GFP_KERNEL);
1901 if (b3skb == NULL) {
1902 dev_err(cs->dev, "%s: out of memory\n", __func__);
1903 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1904 kfree(b3cmsg);
1905 return;
1906 }
1907 capi_cmsg2message(b3cmsg,
1908 __skb_put(b3skb, CAPI_DISCONNECT_B3_IND_BASELEN));
1909 kfree(b3cmsg);
1910 capi_ctr_handle_message(&iif->ctr, ap->id, b3skb);
1911 }
1912
1913 /* trigger hangup, causing eventual DISCONNECT_IND */
1914 if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
1915 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1916 return;
1917 }
1918 gigaset_schedule_event(cs);
1919
1920 /* emit reply */
1921 send_conf(iif, ap, skb, CapiSuccess);
1922 }
1923
1924 /*
1925 * process DISCONNECT_B3_REQ message
1926 * schedule EV_HUP and emit DISCONNECT_B3_CONF reply
1927 */
do_disconnect_b3_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1928 static void do_disconnect_b3_req(struct gigaset_capi_ctr *iif,
1929 struct gigaset_capi_appl *ap,
1930 struct sk_buff *skb)
1931 {
1932 struct cardstate *cs = iif->ctr.driverdata;
1933 _cmsg *cmsg = &iif->acmsg;
1934 struct bc_state *bcs;
1935 int channel;
1936
1937 /* decode message */
1938 capi_message2cmsg(cmsg, skb->data);
1939 dump_cmsg(DEBUG_CMD, __func__, cmsg);
1940
1941 /* extract and check channel number and NCCI */
1942 channel = (cmsg->adr.adrNCCI >> 8) & 0xff;
1943 if (!channel || channel > cs->channels ||
1944 ((cmsg->adr.adrNCCI >> 16) & 0xffff) != 1) {
1945 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1946 "DISCONNECT_B3_REQ", "NCCI", cmsg->adr.adrNCCI);
1947 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1948 return;
1949 }
1950 bcs = &cs->bcs[channel-1];
1951
1952 /* reject if logical connection not active */
1953 if (bcs->apconnstate < APCONN_ACTIVE) {
1954 send_conf(iif, ap, skb,
1955 CapiMessageNotSupportedInCurrentState);
1956 return;
1957 }
1958
1959 /* trigger hangup, causing eventual DISCONNECT_B3_IND */
1960 if (!gigaset_add_event(cs, &bcs->at_state, EV_HUP, NULL, 0, NULL)) {
1961 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
1962 return;
1963 }
1964 gigaset_schedule_event(cs);
1965
1966 /* NCPI parameter: not applicable for B3 Transparent */
1967 ignore_cstruct_param(cs, cmsg->NCPI,
1968 "DISCONNECT_B3_REQ", "NCPI");
1969 send_conf(iif, ap, skb, (cmsg->NCPI && cmsg->NCPI[0]) ?
1970 CapiNcpiNotSupportedByProtocol : CapiSuccess);
1971 }
1972
1973 /*
1974 * process DATA_B3_REQ message
1975 */
do_data_b3_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)1976 static void do_data_b3_req(struct gigaset_capi_ctr *iif,
1977 struct gigaset_capi_appl *ap,
1978 struct sk_buff *skb)
1979 {
1980 struct cardstate *cs = iif->ctr.driverdata;
1981 struct bc_state *bcs;
1982 int channel = CAPIMSG_PLCI_PART(skb->data);
1983 u16 ncci = CAPIMSG_NCCI_PART(skb->data);
1984 u16 msglen = CAPIMSG_LEN(skb->data);
1985 u16 datalen = CAPIMSG_DATALEN(skb->data);
1986 u16 flags = CAPIMSG_FLAGS(skb->data);
1987 u16 msgid = CAPIMSG_MSGID(skb->data);
1988 u16 handle = CAPIMSG_HANDLE_REQ(skb->data);
1989
1990 /* frequent message, avoid _cmsg overhead */
1991 dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
1992
1993 /* check parameters */
1994 if (channel == 0 || channel > cs->channels || ncci != 1) {
1995 dev_notice(cs->dev, "%s: invalid %s 0x%02x\n",
1996 "DATA_B3_REQ", "NCCI", CAPIMSG_NCCI(skb->data));
1997 send_conf(iif, ap, skb, CapiIllContrPlciNcci);
1998 return;
1999 }
2000 bcs = &cs->bcs[channel-1];
2001 if (msglen != CAPI_DATA_B3_REQ_LEN && msglen != CAPI_DATA_B3_REQ_LEN64)
2002 dev_notice(cs->dev, "%s: unexpected length %d\n",
2003 "DATA_B3_REQ", msglen);
2004 if (msglen + datalen != skb->len)
2005 dev_notice(cs->dev, "%s: length mismatch (%d+%d!=%d)\n",
2006 "DATA_B3_REQ", msglen, datalen, skb->len);
2007 if (msglen + datalen > skb->len) {
2008 /* message too short for announced data length */
2009 send_conf(iif, ap, skb, CapiIllMessageParmCoding); /* ? */
2010 return;
2011 }
2012 if (flags & CAPI_FLAGS_RESERVED) {
2013 dev_notice(cs->dev, "%s: reserved flags set (%x)\n",
2014 "DATA_B3_REQ", flags);
2015 send_conf(iif, ap, skb, CapiIllMessageParmCoding);
2016 return;
2017 }
2018
2019 /* reject if logical connection not active */
2020 if (bcs->apconnstate < APCONN_ACTIVE) {
2021 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
2022 return;
2023 }
2024
2025 /* pull CAPI message into link layer header */
2026 skb_reset_mac_header(skb);
2027 skb->mac_len = msglen;
2028 skb_pull(skb, msglen);
2029
2030 /* pass to device-specific module */
2031 if (cs->ops->send_skb(bcs, skb) < 0) {
2032 send_conf(iif, ap, skb, CAPI_MSGOSRESOURCEERR);
2033 return;
2034 }
2035
2036 /*
2037 * DATA_B3_CONF will be sent by gigaset_skb_sent() only if "delivery
2038 * confirmation" bit is set; otherwise we have to send it now
2039 */
2040 if (!(flags & CAPI_FLAGS_DELIVERY_CONFIRMATION))
2041 send_data_b3_conf(cs, &iif->ctr, ap->id, msgid, channel, handle,
2042 flags ? CapiFlagsNotSupportedByProtocol
2043 : CAPI_NOERROR);
2044 }
2045
2046 /*
2047 * process RESET_B3_REQ message
2048 * just always reply "not supported by current protocol"
2049 */
do_reset_b3_req(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)2050 static void do_reset_b3_req(struct gigaset_capi_ctr *iif,
2051 struct gigaset_capi_appl *ap,
2052 struct sk_buff *skb)
2053 {
2054 /* decode message */
2055 capi_message2cmsg(&iif->acmsg, skb->data);
2056 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
2057 send_conf(iif, ap, skb,
2058 CapiResetProcedureNotSupportedByCurrentProtocol);
2059 }
2060
2061 /*
2062 * dump unsupported/ignored messages at most twice per minute,
2063 * some apps send those very frequently
2064 */
2065 static unsigned long ignored_msg_dump_time;
2066
2067 /*
2068 * unsupported CAPI message handler
2069 */
do_unsupported(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)2070 static void do_unsupported(struct gigaset_capi_ctr *iif,
2071 struct gigaset_capi_appl *ap,
2072 struct sk_buff *skb)
2073 {
2074 /* decode message */
2075 capi_message2cmsg(&iif->acmsg, skb->data);
2076 if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000))
2077 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
2078 send_conf(iif, ap, skb, CapiMessageNotSupportedInCurrentState);
2079 }
2080
2081 /*
2082 * CAPI message handler: no-op
2083 */
do_nothing(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)2084 static void do_nothing(struct gigaset_capi_ctr *iif,
2085 struct gigaset_capi_appl *ap,
2086 struct sk_buff *skb)
2087 {
2088 if (printk_timed_ratelimit(&ignored_msg_dump_time, 30 * 1000)) {
2089 /* decode message */
2090 capi_message2cmsg(&iif->acmsg, skb->data);
2091 dump_cmsg(DEBUG_CMD, __func__, &iif->acmsg);
2092 }
2093 dev_kfree_skb_any(skb);
2094 }
2095
do_data_b3_resp(struct gigaset_capi_ctr * iif,struct gigaset_capi_appl * ap,struct sk_buff * skb)2096 static void do_data_b3_resp(struct gigaset_capi_ctr *iif,
2097 struct gigaset_capi_appl *ap,
2098 struct sk_buff *skb)
2099 {
2100 dump_rawmsg(DEBUG_MCMD, __func__, skb->data);
2101 dev_kfree_skb_any(skb);
2102 }
2103
2104 /* table of outgoing CAPI message handlers with lookup function */
2105 typedef void (*capi_send_handler_t)(struct gigaset_capi_ctr *,
2106 struct gigaset_capi_appl *,
2107 struct sk_buff *);
2108
2109 static struct {
2110 u16 cmd;
2111 capi_send_handler_t handler;
2112 } capi_send_handler_table[] = {
2113 /* most frequent messages first for faster lookup */
2114 { CAPI_DATA_B3_REQ, do_data_b3_req },
2115 { CAPI_DATA_B3_RESP, do_data_b3_resp },
2116
2117 { CAPI_ALERT_REQ, do_alert_req },
2118 { CAPI_CONNECT_ACTIVE_RESP, do_nothing },
2119 { CAPI_CONNECT_B3_ACTIVE_RESP, do_nothing },
2120 { CAPI_CONNECT_B3_REQ, do_connect_b3_req },
2121 { CAPI_CONNECT_B3_RESP, do_connect_b3_resp },
2122 { CAPI_CONNECT_B3_T90_ACTIVE_RESP, do_nothing },
2123 { CAPI_CONNECT_REQ, do_connect_req },
2124 { CAPI_CONNECT_RESP, do_connect_resp },
2125 { CAPI_DISCONNECT_B3_REQ, do_disconnect_b3_req },
2126 { CAPI_DISCONNECT_B3_RESP, do_nothing },
2127 { CAPI_DISCONNECT_REQ, do_disconnect_req },
2128 { CAPI_DISCONNECT_RESP, do_nothing },
2129 { CAPI_FACILITY_REQ, do_facility_req },
2130 { CAPI_FACILITY_RESP, do_nothing },
2131 { CAPI_LISTEN_REQ, do_listen_req },
2132 { CAPI_SELECT_B_PROTOCOL_REQ, do_unsupported },
2133 { CAPI_RESET_B3_REQ, do_reset_b3_req },
2134 { CAPI_RESET_B3_RESP, do_nothing },
2135
2136 /*
2137 * ToDo: support overlap sending (requires ev-layer state
2138 * machine extension to generate additional ATD commands)
2139 */
2140 { CAPI_INFO_REQ, do_unsupported },
2141 { CAPI_INFO_RESP, do_nothing },
2142
2143 /*
2144 * ToDo: what's the proper response for these?
2145 */
2146 { CAPI_MANUFACTURER_REQ, do_nothing },
2147 { CAPI_MANUFACTURER_RESP, do_nothing },
2148 };
2149
2150 /* look up handler */
lookup_capi_send_handler(const u16 cmd)2151 static inline capi_send_handler_t lookup_capi_send_handler(const u16 cmd)
2152 {
2153 size_t i;
2154
2155 for (i = 0; i < ARRAY_SIZE(capi_send_handler_table); i++)
2156 if (capi_send_handler_table[i].cmd == cmd)
2157 return capi_send_handler_table[i].handler;
2158 return NULL;
2159 }
2160
2161
2162 /**
2163 * gigaset_send_message() - accept a CAPI message from an application
2164 * @ctr: controller descriptor structure.
2165 * @skb: CAPI message.
2166 *
2167 * Return value: CAPI error code
2168 * Note: capidrv (and probably others, too) only uses the return value to
2169 * decide whether it has to free the skb (only if result != CAPI_NOERROR (0))
2170 */
gigaset_send_message(struct capi_ctr * ctr,struct sk_buff * skb)2171 static u16 gigaset_send_message(struct capi_ctr *ctr, struct sk_buff *skb)
2172 {
2173 struct gigaset_capi_ctr *iif
2174 = container_of(ctr, struct gigaset_capi_ctr, ctr);
2175 struct cardstate *cs = ctr->driverdata;
2176 struct gigaset_capi_appl *ap;
2177 capi_send_handler_t handler;
2178
2179 /* can only handle linear sk_buffs */
2180 if (skb_linearize(skb) < 0) {
2181 dev_warn(cs->dev, "%s: skb_linearize failed\n", __func__);
2182 return CAPI_MSGOSRESOURCEERR;
2183 }
2184
2185 /* retrieve application data structure */
2186 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2187 if (!ap) {
2188 dev_notice(cs->dev, "%s: application %u not registered\n",
2189 __func__, CAPIMSG_APPID(skb->data));
2190 return CAPI_ILLAPPNR;
2191 }
2192
2193 /* look up command */
2194 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2195 if (!handler) {
2196 /* unknown/unsupported message type */
2197 if (printk_ratelimit())
2198 dev_notice(cs->dev, "%s: unsupported message %u\n",
2199 __func__, CAPIMSG_CMD(skb->data));
2200 return CAPI_ILLCMDORSUBCMDORMSGTOSMALL;
2201 }
2202
2203 /* serialize */
2204 if (atomic_add_return(1, &iif->sendqlen) > 1) {
2205 /* queue behind other messages */
2206 skb_queue_tail(&iif->sendqueue, skb);
2207 return CAPI_NOERROR;
2208 }
2209
2210 /* process message */
2211 handler(iif, ap, skb);
2212
2213 /* process other messages arrived in the meantime */
2214 while (atomic_sub_return(1, &iif->sendqlen) > 0) {
2215 skb = skb_dequeue(&iif->sendqueue);
2216 if (!skb) {
2217 /* should never happen */
2218 dev_err(cs->dev, "%s: send queue empty\n", __func__);
2219 continue;
2220 }
2221 ap = get_appl(iif, CAPIMSG_APPID(skb->data));
2222 if (!ap) {
2223 /* could that happen? */
2224 dev_warn(cs->dev, "%s: application %u vanished\n",
2225 __func__, CAPIMSG_APPID(skb->data));
2226 continue;
2227 }
2228 handler = lookup_capi_send_handler(CAPIMSG_CMD(skb->data));
2229 if (!handler) {
2230 /* should never happen */
2231 dev_err(cs->dev, "%s: handler %x vanished\n",
2232 __func__, CAPIMSG_CMD(skb->data));
2233 continue;
2234 }
2235 handler(iif, ap, skb);
2236 }
2237
2238 return CAPI_NOERROR;
2239 }
2240
2241 /**
2242 * gigaset_procinfo() - build single line description for controller
2243 * @ctr: controller descriptor structure.
2244 *
2245 * Return value: pointer to generated string (null terminated)
2246 */
gigaset_procinfo(struct capi_ctr * ctr)2247 static char *gigaset_procinfo(struct capi_ctr *ctr)
2248 {
2249 return ctr->name; /* ToDo: more? */
2250 }
2251
gigaset_proc_show(struct seq_file * m,void * v)2252 static int gigaset_proc_show(struct seq_file *m, void *v)
2253 {
2254 struct capi_ctr *ctr = m->private;
2255 struct cardstate *cs = ctr->driverdata;
2256 char *s;
2257 int i;
2258
2259 seq_printf(m, "%-16s %s\n", "name", ctr->name);
2260 seq_printf(m, "%-16s %s %s\n", "dev",
2261 dev_driver_string(cs->dev), dev_name(cs->dev));
2262 seq_printf(m, "%-16s %d\n", "id", cs->myid);
2263 if (cs->gotfwver)
2264 seq_printf(m, "%-16s %d.%d.%d.%d\n", "firmware",
2265 cs->fwver[0], cs->fwver[1], cs->fwver[2], cs->fwver[3]);
2266 seq_printf(m, "%-16s %d\n", "channels", cs->channels);
2267 seq_printf(m, "%-16s %s\n", "onechannel", cs->onechannel ? "yes" : "no");
2268
2269 switch (cs->mode) {
2270 case M_UNKNOWN:
2271 s = "unknown";
2272 break;
2273 case M_CONFIG:
2274 s = "config";
2275 break;
2276 case M_UNIMODEM:
2277 s = "Unimodem";
2278 break;
2279 case M_CID:
2280 s = "CID";
2281 break;
2282 default:
2283 s = "??";
2284 }
2285 seq_printf(m, "%-16s %s\n", "mode", s);
2286
2287 switch (cs->mstate) {
2288 case MS_UNINITIALIZED:
2289 s = "uninitialized";
2290 break;
2291 case MS_INIT:
2292 s = "init";
2293 break;
2294 case MS_LOCKED:
2295 s = "locked";
2296 break;
2297 case MS_SHUTDOWN:
2298 s = "shutdown";
2299 break;
2300 case MS_RECOVER:
2301 s = "recover";
2302 break;
2303 case MS_READY:
2304 s = "ready";
2305 break;
2306 default:
2307 s = "??";
2308 }
2309 seq_printf(m, "%-16s %s\n", "mstate", s);
2310
2311 seq_printf(m, "%-16s %s\n", "running", cs->running ? "yes" : "no");
2312 seq_printf(m, "%-16s %s\n", "connected", cs->connected ? "yes" : "no");
2313 seq_printf(m, "%-16s %s\n", "isdn_up", cs->isdn_up ? "yes" : "no");
2314 seq_printf(m, "%-16s %s\n", "cidmode", cs->cidmode ? "yes" : "no");
2315
2316 for (i = 0; i < cs->channels; i++) {
2317 seq_printf(m, "[%d]%-13s %d\n", i, "corrupted",
2318 cs->bcs[i].corrupted);
2319 seq_printf(m, "[%d]%-13s %d\n", i, "trans_down",
2320 cs->bcs[i].trans_down);
2321 seq_printf(m, "[%d]%-13s %d\n", i, "trans_up",
2322 cs->bcs[i].trans_up);
2323 seq_printf(m, "[%d]%-13s %d\n", i, "chstate",
2324 cs->bcs[i].chstate);
2325 switch (cs->bcs[i].proto2) {
2326 case L2_BITSYNC:
2327 s = "bitsync";
2328 break;
2329 case L2_HDLC:
2330 s = "HDLC";
2331 break;
2332 case L2_VOICE:
2333 s = "voice";
2334 break;
2335 default:
2336 s = "??";
2337 }
2338 seq_printf(m, "[%d]%-13s %s\n", i, "proto2", s);
2339 }
2340 return 0;
2341 }
2342
gigaset_proc_open(struct inode * inode,struct file * file)2343 static int gigaset_proc_open(struct inode *inode, struct file *file)
2344 {
2345 return single_open(file, gigaset_proc_show, PDE(inode)->data);
2346 }
2347
2348 static const struct file_operations gigaset_proc_fops = {
2349 .owner = THIS_MODULE,
2350 .open = gigaset_proc_open,
2351 .read = seq_read,
2352 .llseek = seq_lseek,
2353 .release = single_release,
2354 };
2355
2356 /**
2357 * gigaset_isdn_regdev() - register device to LL
2358 * @cs: device descriptor structure.
2359 * @isdnid: device name.
2360 *
2361 * Return value: 1 for success, 0 for failure
2362 */
gigaset_isdn_regdev(struct cardstate * cs,const char * isdnid)2363 int gigaset_isdn_regdev(struct cardstate *cs, const char *isdnid)
2364 {
2365 struct gigaset_capi_ctr *iif;
2366 int rc;
2367
2368 iif = kmalloc(sizeof(*iif), GFP_KERNEL);
2369 if (!iif) {
2370 pr_err("%s: out of memory\n", __func__);
2371 return 0;
2372 }
2373
2374 /* prepare controller structure */
2375 iif->ctr.owner = THIS_MODULE;
2376 iif->ctr.driverdata = cs;
2377 strncpy(iif->ctr.name, isdnid, sizeof(iif->ctr.name));
2378 iif->ctr.driver_name = "gigaset";
2379 iif->ctr.load_firmware = NULL;
2380 iif->ctr.reset_ctr = NULL;
2381 iif->ctr.register_appl = gigaset_register_appl;
2382 iif->ctr.release_appl = gigaset_release_appl;
2383 iif->ctr.send_message = gigaset_send_message;
2384 iif->ctr.procinfo = gigaset_procinfo;
2385 iif->ctr.proc_fops = &gigaset_proc_fops;
2386 INIT_LIST_HEAD(&iif->appls);
2387 skb_queue_head_init(&iif->sendqueue);
2388 atomic_set(&iif->sendqlen, 0);
2389
2390 /* register controller with CAPI */
2391 rc = attach_capi_ctr(&iif->ctr);
2392 if (rc) {
2393 pr_err("attach_capi_ctr failed (%d)\n", rc);
2394 kfree(iif);
2395 return 0;
2396 }
2397
2398 cs->iif = iif;
2399 cs->hw_hdr_len = CAPI_DATA_B3_REQ_LEN;
2400 return 1;
2401 }
2402
2403 /**
2404 * gigaset_isdn_unregdev() - unregister device from LL
2405 * @cs: device descriptor structure.
2406 */
gigaset_isdn_unregdev(struct cardstate * cs)2407 void gigaset_isdn_unregdev(struct cardstate *cs)
2408 {
2409 struct gigaset_capi_ctr *iif = cs->iif;
2410
2411 detach_capi_ctr(&iif->ctr);
2412 kfree(iif);
2413 cs->iif = NULL;
2414 }
2415
2416 static struct capi_driver capi_driver_gigaset = {
2417 .name = "gigaset",
2418 .revision = "1.0",
2419 };
2420
2421 /**
2422 * gigaset_isdn_regdrv() - register driver to LL
2423 */
gigaset_isdn_regdrv(void)2424 void gigaset_isdn_regdrv(void)
2425 {
2426 pr_info("Kernel CAPI interface\n");
2427 register_capi_driver(&capi_driver_gigaset);
2428 }
2429
2430 /**
2431 * gigaset_isdn_unregdrv() - unregister driver from LL
2432 */
gigaset_isdn_unregdrv(void)2433 void gigaset_isdn_unregdrv(void)
2434 {
2435 unregister_capi_driver(&capi_driver_gigaset);
2436 }
2437