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comparison src/g23m-gsm/dl/dl_dcch3.c @ 1:d393cd9bb723

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src/g23m-*: initial import from Magnetite
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 15 Jul 2018 04:40:46 +0000
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0:b6a5e36de839 1:d393cd9bb723
1 /*
2 +-----------------------------------------------------------------------------
3 | Project : GSM-PS
4 | Modul : DL_DCCH3
5 +-----------------------------------------------------------------------------
6 | Copyright 2002 Texas Instruments Berlin, AG
7 | All rights reserved.
8 |
9 | This file is confidential and a trade secret of Texas
10 | Instruments Berlin, AG
11 | The receipt of or possession of this file does not convey
12 | any rights to reproduce or disclose its contents or to
13 | manufacture, use, or sell anything it may describe, in
14 | whole, or in part, without the specific written consent of
15 | Texas Instruments Berlin, AG.
16 +-----------------------------------------------------------------------------
17 | Purpose : This Modul defines the functions for the slow
18 | dedicated control channel (SAPI 3) of the component DL
19 +-----------------------------------------------------------------------------
20 */
21
22 #ifndef DL_DCCH3_C
23 #define DL_DCCH3_C
24
25 #define ENTITY_DL
26
27 /*==== INCLUDES ===================================================*/
28
29 #include "typedefs.h"
30 #include <string.h>
31 #include "pconst.cdg"
32 #include "vsi.h"
33 #include "custom.h"
34 #include "gsm.h"
35 #include "mon_dl.h"
36 #include "prim.h"
37 #include "pei.h"
38 #include "tok.h"
39 #include "ccdapi.h"
40 #include "dl.h"
41 #include "dl_trc.h"
42
43
44 /*==== EXPORT =====================================================*/
45
46 /*==== PRIVAT =====================================================*/
47
48 /*==== VARIABLES ==================================================*/
49
50 /*==== FUNCTIONS ==================================================*/
51 /*
52 +--------------------------------------------------------------------+
53 | PROJECT : GSM-PS (6147) MODULE : DL_DCCH3 |
54 | STATE : code ROUTINE : dcch3_init_dl_data |
55 +--------------------------------------------------------------------+
56
57 PURPOSE : Initialisation of SDCCH data (SAPI 3) for an instance.
58
59 */
60
61 GLOBAL void dcch3_init_dl_data (void)
62 {
63 GET_INSTANCE_DATA;
64 T_CCH *pcch = &dl_data->cch[C_DCCH3];
65
66 TRACE_FUNCTION ("dcch3_init_dl_data()");
67
68 memset (pcch, 0, sizeof (T_CCH));
69 com_clear_queue (PS_SAPI_3);
70
71 if (dl_data->dcch3_in_msg)
72 {
73 COM_FREE_POINTER (dl_data->dcch3_in_msg);
74 dl_data->dcch3_in_msg = NULL;
75 }
76
77 dl_data->dcch3_disc_request = FALSE;
78 set_channel_state(C_DCCH3, STATE_DISABLED);
79 }
80
81 /*
82 +--------------------------------------------------------------------+
83 | PROJECT : GSM-PS (6147) MODULE : DL_DCCH3 |
84 | STATE : code ROUTINE : dcch3_enable |
85 +--------------------------------------------------------------------+
86
87 PURPOSE : Enabling SAPI 3 connections.
88
89 */
90
91 GLOBAL void dcch3_enable (UBYTE ch_type)
92 {
93 GET_INSTANCE_DATA;
94 TRACE_FUNCTION ("dcch3_enable()");
95
96 switch (dl_data->state[C_DCCH3])
97 {
98 case STATE_DISABLED:
99 set_channel_state (C_DCCH3, STATE_IDLE_DL);
100 dl_data->cch[C_DCCH3].ch_type = ch_type;
101 break;
102 default:
103 break;
104 }
105 }
106
107 /*
108 +--------------------------------------------------------------------+
109 | PROJECT : GSM-PS (6147) MODULE : DL_DCCH3 |
110 | STATE : code ROUTINE : dcch3_establish_req |
111 +--------------------------------------------------------------------+
112
113 PURPOSE : Establish Request for SDCCH (SAPI 3).
114
115 */
116
117 GLOBAL void dcch3_establish_req (T_DL_ESTABLISH_REQ * est_req)
118 {
119 GET_INSTANCE_DATA;
120 TRACE_FUNCTION ("dcch3_establish_req()");
121
122 DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH3, est_req->ch_type, "est req");
123
124
125 switch (dl_data->state[C_DCCH3])
126 {
127 case STATE_IDLE_DL:
128 case STATE_DISABLED:
129 case STATE_MULTIPLE_FRAME_ESTABLISHED:
130 case STATE_TIMER_RECOVERY:
131 {
132 T_CCH *pcch = &dl_data->cch[C_DCCH3];
133
134 pcch->ch_type = est_req->ch_type;
135
136 dl_data->dcch3_disc_request = FALSE;
137 dl_data->dcch3_unserved = com_queue_awaiting_transmission (PS_SAPI_3) ?
138 DL_UNSERVED : DL_ALL_DONE;
139
140 com_clear_queue (PS_SAPI_3);
141 pcch->vtx = SABM_CMD;
142 pcch->time_flag = TRUE;
143 pcch->rc = 0;
144 set_channel_state (C_DCCH3, STATE_AWAITING_ESTABLISHMENT);
145 TRACE_EVENT_WIN_P5 ("EST_REQ: %s SAPI=%u vtx=%s (%s#%u)", CH_TYPE_NAME[pcch->ch_type],
146 est_req->sapi, VTX_NAME[pcch->vtx],
147 __FILE10__, __LINE__);
148 }
149
150 break;
151 default:
152 break;
153 }
154 COM_FREE_POINTER (est_req);
155 }
156
157 /*
158 +--------------------------------------------------------------------+
159 | PROJECT : GSM-PS (6147) MODULE : DL_SDCCH |
160 | STATE : code ROUTINE : sdcch3_release_req |
161 +--------------------------------------------------------------------+
162
163 PURPOSE : Release Request for SDCCH (SAPI 3).
164
165 */
166
167 GLOBAL BOOL dcch3_release_req (T_DL_RELEASE_REQ * release_req)
168 {
169 GET_INSTANCE_DATA;
170 BOOL bFree = TRUE;
171
172 TRACE_FUNCTION ("dcch3_release_req()");
173
174 if (release_req->mode EQ DL_LOCAL_END_RELEASE)
175 {
176 DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH3, release_req->ch_type, "local end release req");
177 bFree = FALSE;
178 }
179 else
180 {
181 DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH3, release_req->ch_type, "normal release req");
182 dl_data->cch[C_DCCH3].ch_type = release_req->ch_type;
183 switch (dl_data->state[C_DCCH3])
184 {
185 default:
186 bFree = FALSE;
187 break;
188
189 case STATE_AWAITING_ESTABLISHMENT:
190 case STATE_MULTIPLE_FRAME_ESTABLISHED:
191 case STATE_TIMER_RECOVERY:
192 if (!dl_data->dcch3_disc_request AND (dl_data->cch[C_DCCH3].vtx EQ RR_CMD))
193 {
194 dl_data->dcch3_disc_request = TRUE;
195 }
196 else
197 {
198 com_prepare_DISC (C_DCCH3, release_req->sapi);
199 }
200 break;
201
202 case STATE_AWAITING_RELEASE:
203 dl_data->cch[C_DCCH3].T200_counter = 0;
204 break;
205 }
206 }
207
208 if (bFree EQ FALSE)
209 {
210 PREUSE (release_req, release_cnf, DL_RELEASE_CNF);
211 release_cnf->indication =
212 com_queue_awaiting_transmission (PS_SAPI_3) ? DL_UNSERVED : DL_ALL_DONE;
213 PSENDX (RR, release_cnf);
214 dcch3_init_dl_data ();
215 }
216
217 return bFree;
218 }
219
220
221 /*
222 +--------------------------------------------------------------------+
223 | PROJECT : GSM-PS (6147) MODULE : DL_DCCH3 |
224 | STATE : code ROUTINE : dcch3_mdl_release_req |
225 +--------------------------------------------------------------------+
226
227 PURPOSE : Release Request from Mobility Management for SDCCH (SAPI 3).
228
229 */
230
231 GLOBAL void dcch3_mdl_release_req (void)
232 {
233 GET_INSTANCE_DATA;
234 TRACE_FUNCTION ("dcch3_mdl_release_req()");
235
236 DL_OFFLINE_TRACE (TRACE_DL_EVENT, C_DCCH3, dl_data->cch[C_DCCH3].ch_type, "mdl rel req");
237
238 switch (dl_data->state[C_DCCH3])
239 {
240 case STATE_AWAITING_ESTABLISHMENT:
241 case STATE_TIMER_RECOVERY:
242 case STATE_AWAITING_RELEASE:
243 drr_dl_release_cnf (dl_data->cch[C_DCCH3].ch_type, PS_SAPI_3, TRUE);
244 break;
245
246 case STATE_MULTIPLE_FRAME_ESTABLISHED:
247 drr_dl_release_ind (dl_data->cch[C_DCCH3].ch_type, PS_SAPI_3, NOT_PRESENT_8BIT, TRUE);
248 break;
249
250 default:
251 break;
252 }
253 }
254
255 /*
256 +--------------------------------------------------------------------+
257 | PROJECT : GSM-PS (6147) MODULE : DL_DCCH3 |
258 | STATE : code ROUTINE : dcch3_data_req |
259 +--------------------------------------------------------------------+
260
261 PURPOSE : Data Request on SDCCH (SAPI 3).
262
263 */
264
265 GLOBAL void dcch3_data_req (T_DL_DATA_REQ * data_req)
266 {
267 GET_INSTANCE_DATA;
268 TRACE_FUNCTION ("dcch3_data_req()");
269
270 switch (dl_data->state[C_DCCH3])
271 {
272 case STATE_MULTIPLE_FRAME_ESTABLISHED:
273 case STATE_TIMER_RECOVERY:
274 com_store_queue (PS_SAPI_3, data_req);
275 break;
276
277 default:
278 COM_FREE_POINTER (data_req);
279 break;
280 }
281 }
282
283 /*
284 +--------------------------------------------------------------------+
285 | PROJECT : GSM-PS (6147) MODULE : DL_SDCCH |
286 | STATE : code ROUTINE : dcch3_check_disc |
287 +--------------------------------------------------------------------+
288
289 PURPOSE : DISC command frame on DCCH3.
290
291 */
292
293 GLOBAL int dcch3_check_disc (int send)
294 {
295 GET_INSTANCE_DATA;
296 TRACE_FUNCTION ("dcch3_check_disc()");
297
298 if (dl_data->dcch3_disc_request AND !(dl_data->cch[C_DCCH3].vtx EQ RR_CMD))
299 {
300 com_prepare_DISC (C_DCCH3, PS_SAPI_3);
301 return uplink_awaiting_release (C_DCCH3, PS_SAPI_3);
302 }
303 else
304 return send;
305 }
306 #endif /* DL_DCCH3_C */
307