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1 | /* |
2 | * | |
3 | * Author Karsten Keil <kkeil@novell.com> | |
4 | * | |
5 | * Copyright 2008 by Karsten Keil <kkeil@novell.com> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | */ | |
17 | ||
18 | ||
5a0e3ad6 | 19 | #include <linux/slab.h> |
1b2b03f8 KK |
20 | #include <linux/module.h> |
21 | #include <linux/mISDNhw.h> | |
5b834354 | 22 | #include "core.h" |
1b2b03f8 KK |
23 | #include "layer1.h" |
24 | #include "fsm.h" | |
25 | ||
dfa96ec1 | 26 | static u_int *debug; |
1b2b03f8 KK |
27 | |
28 | struct layer1 { | |
29 | u_long Flags; | |
30 | struct FsmInst l1m; | |
31 | struct FsmTimer timer; | |
32 | int delay; | |
33 | struct dchannel *dch; | |
34 | dchannel_l1callback *dcb; | |
35 | }; | |
36 | ||
37 | #define TIMER3_VALUE 7000 | |
38 | ||
39 | static | |
40 | struct Fsm l1fsm_s = {NULL, 0, 0, NULL, NULL}; | |
41 | ||
42 | enum { | |
43 | ST_L1_F2, | |
44 | ST_L1_F3, | |
45 | ST_L1_F4, | |
46 | ST_L1_F5, | |
47 | ST_L1_F6, | |
48 | ST_L1_F7, | |
49 | ST_L1_F8, | |
50 | }; | |
51 | ||
52 | #define L1S_STATE_COUNT (ST_L1_F8+1) | |
53 | ||
54 | static char *strL1SState[] = | |
55 | { | |
56 | "ST_L1_F2", | |
57 | "ST_L1_F3", | |
58 | "ST_L1_F4", | |
59 | "ST_L1_F5", | |
60 | "ST_L1_F6", | |
61 | "ST_L1_F7", | |
62 | "ST_L1_F8", | |
63 | }; | |
64 | ||
65 | enum { | |
66 | EV_PH_ACTIVATE, | |
67 | EV_PH_DEACTIVATE, | |
68 | EV_RESET_IND, | |
69 | EV_DEACT_CNF, | |
70 | EV_DEACT_IND, | |
71 | EV_POWER_UP, | |
72 | EV_ANYSIG_IND, | |
73 | EV_INFO2_IND, | |
74 | EV_INFO4_IND, | |
75 | EV_TIMER_DEACT, | |
76 | EV_TIMER_ACT, | |
77 | EV_TIMER3, | |
78 | }; | |
79 | ||
80 | #define L1_EVENT_COUNT (EV_TIMER3 + 1) | |
81 | ||
82 | static char *strL1Event[] = | |
83 | { | |
84 | "EV_PH_ACTIVATE", | |
85 | "EV_PH_DEACTIVATE", | |
86 | "EV_RESET_IND", | |
87 | "EV_DEACT_CNF", | |
88 | "EV_DEACT_IND", | |
89 | "EV_POWER_UP", | |
90 | "EV_ANYSIG_IND", | |
91 | "EV_INFO2_IND", | |
92 | "EV_INFO4_IND", | |
93 | "EV_TIMER_DEACT", | |
94 | "EV_TIMER_ACT", | |
95 | "EV_TIMER3", | |
96 | }; | |
97 | ||
98 | static void | |
99 | l1m_debug(struct FsmInst *fi, char *fmt, ...) | |
100 | { | |
101 | struct layer1 *l1 = fi->userdata; | |
102 | va_list va; | |
103 | ||
104 | va_start(va, fmt); | |
837468d1 | 105 | printk(KERN_DEBUG "%s: ", dev_name(&l1->dch->dev.dev)); |
1b2b03f8 KK |
106 | vprintk(fmt, va); |
107 | printk("\n"); | |
108 | va_end(va); | |
109 | } | |
110 | ||
111 | static void | |
112 | l1_reset(struct FsmInst *fi, int event, void *arg) | |
113 | { | |
114 | mISDN_FsmChangeState(fi, ST_L1_F3); | |
115 | } | |
116 | ||
117 | static void | |
118 | l1_deact_cnf(struct FsmInst *fi, int event, void *arg) | |
119 | { | |
120 | struct layer1 *l1 = fi->userdata; | |
121 | ||
122 | mISDN_FsmChangeState(fi, ST_L1_F3); | |
123 | if (test_bit(FLG_L1_ACTIVATING, &l1->Flags)) | |
124 | l1->dcb(l1->dch, HW_POWERUP_REQ); | |
125 | } | |
126 | ||
127 | static void | |
128 | l1_deact_req_s(struct FsmInst *fi, int event, void *arg) | |
129 | { | |
130 | struct layer1 *l1 = fi->userdata; | |
131 | ||
132 | mISDN_FsmChangeState(fi, ST_L1_F3); | |
133 | mISDN_FsmRestartTimer(&l1->timer, 550, EV_TIMER_DEACT, NULL, 2); | |
134 | test_and_set_bit(FLG_L1_DEACTTIMER, &l1->Flags); | |
135 | } | |
136 | ||
137 | static void | |
138 | l1_power_up_s(struct FsmInst *fi, int event, void *arg) | |
139 | { | |
140 | struct layer1 *l1 = fi->userdata; | |
141 | ||
142 | if (test_bit(FLG_L1_ACTIVATING, &l1->Flags)) { | |
143 | mISDN_FsmChangeState(fi, ST_L1_F4); | |
144 | l1->dcb(l1->dch, INFO3_P8); | |
145 | } else | |
146 | mISDN_FsmChangeState(fi, ST_L1_F3); | |
147 | } | |
148 | ||
149 | static void | |
150 | l1_go_F5(struct FsmInst *fi, int event, void *arg) | |
151 | { | |
152 | mISDN_FsmChangeState(fi, ST_L1_F5); | |
153 | } | |
154 | ||
155 | static void | |
156 | l1_go_F8(struct FsmInst *fi, int event, void *arg) | |
157 | { | |
158 | mISDN_FsmChangeState(fi, ST_L1_F8); | |
159 | } | |
160 | ||
161 | static void | |
162 | l1_info2_ind(struct FsmInst *fi, int event, void *arg) | |
163 | { | |
164 | struct layer1 *l1 = fi->userdata; | |
165 | ||
166 | mISDN_FsmChangeState(fi, ST_L1_F6); | |
167 | l1->dcb(l1->dch, INFO3_P8); | |
168 | } | |
169 | ||
170 | static void | |
171 | l1_info4_ind(struct FsmInst *fi, int event, void *arg) | |
172 | { | |
173 | struct layer1 *l1 = fi->userdata; | |
174 | ||
175 | mISDN_FsmChangeState(fi, ST_L1_F7); | |
176 | l1->dcb(l1->dch, INFO3_P8); | |
177 | if (test_and_clear_bit(FLG_L1_DEACTTIMER, &l1->Flags)) | |
178 | mISDN_FsmDelTimer(&l1->timer, 4); | |
179 | if (!test_bit(FLG_L1_ACTIVATED, &l1->Flags)) { | |
180 | if (test_and_clear_bit(FLG_L1_T3RUN, &l1->Flags)) | |
181 | mISDN_FsmDelTimer(&l1->timer, 3); | |
182 | mISDN_FsmRestartTimer(&l1->timer, 110, EV_TIMER_ACT, NULL, 2); | |
183 | test_and_set_bit(FLG_L1_ACTTIMER, &l1->Flags); | |
184 | } | |
185 | } | |
186 | ||
187 | static void | |
188 | l1_timer3(struct FsmInst *fi, int event, void *arg) | |
189 | { | |
190 | struct layer1 *l1 = fi->userdata; | |
191 | ||
192 | test_and_clear_bit(FLG_L1_T3RUN, &l1->Flags); | |
193 | if (test_and_clear_bit(FLG_L1_ACTIVATING, &l1->Flags)) { | |
194 | if (test_and_clear_bit(FLG_L1_DBLOCKED, &l1->Flags)) | |
195 | l1->dcb(l1->dch, HW_D_NOBLOCKED); | |
196 | l1->dcb(l1->dch, PH_DEACTIVATE_IND); | |
197 | } | |
198 | if (l1->l1m.state != ST_L1_F6) { | |
199 | mISDN_FsmChangeState(fi, ST_L1_F3); | |
200 | l1->dcb(l1->dch, HW_POWERUP_REQ); | |
201 | } | |
202 | } | |
203 | ||
204 | static void | |
205 | l1_timer_act(struct FsmInst *fi, int event, void *arg) | |
206 | { | |
207 | struct layer1 *l1 = fi->userdata; | |
208 | ||
209 | test_and_clear_bit(FLG_L1_ACTTIMER, &l1->Flags); | |
210 | test_and_set_bit(FLG_L1_ACTIVATED, &l1->Flags); | |
211 | l1->dcb(l1->dch, PH_ACTIVATE_IND); | |
212 | } | |
213 | ||
214 | static void | |
215 | l1_timer_deact(struct FsmInst *fi, int event, void *arg) | |
216 | { | |
217 | struct layer1 *l1 = fi->userdata; | |
218 | ||
219 | test_and_clear_bit(FLG_L1_DEACTTIMER, &l1->Flags); | |
220 | test_and_clear_bit(FLG_L1_ACTIVATED, &l1->Flags); | |
221 | if (test_and_clear_bit(FLG_L1_DBLOCKED, &l1->Flags)) | |
222 | l1->dcb(l1->dch, HW_D_NOBLOCKED); | |
223 | l1->dcb(l1->dch, PH_DEACTIVATE_IND); | |
224 | l1->dcb(l1->dch, HW_DEACT_REQ); | |
225 | } | |
226 | ||
227 | static void | |
228 | l1_activate_s(struct FsmInst *fi, int event, void *arg) | |
229 | { | |
230 | struct layer1 *l1 = fi->userdata; | |
231 | ||
232 | mISDN_FsmRestartTimer(&l1->timer, TIMER3_VALUE, EV_TIMER3, NULL, 2); | |
233 | test_and_set_bit(FLG_L1_T3RUN, &l1->Flags); | |
234 | l1->dcb(l1->dch, HW_RESET_REQ); | |
235 | } | |
236 | ||
237 | static void | |
238 | l1_activate_no(struct FsmInst *fi, int event, void *arg) | |
239 | { | |
240 | struct layer1 *l1 = fi->userdata; | |
241 | ||
242 | if ((!test_bit(FLG_L1_DEACTTIMER, &l1->Flags)) && | |
243 | (!test_bit(FLG_L1_T3RUN, &l1->Flags))) { | |
244 | test_and_clear_bit(FLG_L1_ACTIVATING, &l1->Flags); | |
245 | if (test_and_clear_bit(FLG_L1_DBLOCKED, &l1->Flags)) | |
246 | l1->dcb(l1->dch, HW_D_NOBLOCKED); | |
247 | l1->dcb(l1->dch, PH_DEACTIVATE_IND); | |
248 | } | |
249 | } | |
250 | ||
251 | static struct FsmNode L1SFnList[] = | |
252 | { | |
253 | {ST_L1_F3, EV_PH_ACTIVATE, l1_activate_s}, | |
254 | {ST_L1_F6, EV_PH_ACTIVATE, l1_activate_no}, | |
255 | {ST_L1_F8, EV_PH_ACTIVATE, l1_activate_no}, | |
256 | {ST_L1_F3, EV_RESET_IND, l1_reset}, | |
257 | {ST_L1_F4, EV_RESET_IND, l1_reset}, | |
258 | {ST_L1_F5, EV_RESET_IND, l1_reset}, | |
259 | {ST_L1_F6, EV_RESET_IND, l1_reset}, | |
260 | {ST_L1_F7, EV_RESET_IND, l1_reset}, | |
261 | {ST_L1_F8, EV_RESET_IND, l1_reset}, | |
262 | {ST_L1_F3, EV_DEACT_CNF, l1_deact_cnf}, | |
263 | {ST_L1_F4, EV_DEACT_CNF, l1_deact_cnf}, | |
264 | {ST_L1_F5, EV_DEACT_CNF, l1_deact_cnf}, | |
265 | {ST_L1_F6, EV_DEACT_CNF, l1_deact_cnf}, | |
266 | {ST_L1_F7, EV_DEACT_CNF, l1_deact_cnf}, | |
267 | {ST_L1_F8, EV_DEACT_CNF, l1_deact_cnf}, | |
268 | {ST_L1_F6, EV_DEACT_IND, l1_deact_req_s}, | |
269 | {ST_L1_F7, EV_DEACT_IND, l1_deact_req_s}, | |
270 | {ST_L1_F8, EV_DEACT_IND, l1_deact_req_s}, | |
271 | {ST_L1_F3, EV_POWER_UP, l1_power_up_s}, | |
272 | {ST_L1_F4, EV_ANYSIG_IND, l1_go_F5}, | |
273 | {ST_L1_F6, EV_ANYSIG_IND, l1_go_F8}, | |
274 | {ST_L1_F7, EV_ANYSIG_IND, l1_go_F8}, | |
275 | {ST_L1_F3, EV_INFO2_IND, l1_info2_ind}, | |
276 | {ST_L1_F4, EV_INFO2_IND, l1_info2_ind}, | |
277 | {ST_L1_F5, EV_INFO2_IND, l1_info2_ind}, | |
278 | {ST_L1_F7, EV_INFO2_IND, l1_info2_ind}, | |
279 | {ST_L1_F8, EV_INFO2_IND, l1_info2_ind}, | |
280 | {ST_L1_F3, EV_INFO4_IND, l1_info4_ind}, | |
281 | {ST_L1_F4, EV_INFO4_IND, l1_info4_ind}, | |
282 | {ST_L1_F5, EV_INFO4_IND, l1_info4_ind}, | |
283 | {ST_L1_F6, EV_INFO4_IND, l1_info4_ind}, | |
284 | {ST_L1_F8, EV_INFO4_IND, l1_info4_ind}, | |
285 | {ST_L1_F3, EV_TIMER3, l1_timer3}, | |
286 | {ST_L1_F4, EV_TIMER3, l1_timer3}, | |
287 | {ST_L1_F5, EV_TIMER3, l1_timer3}, | |
288 | {ST_L1_F6, EV_TIMER3, l1_timer3}, | |
289 | {ST_L1_F8, EV_TIMER3, l1_timer3}, | |
290 | {ST_L1_F7, EV_TIMER_ACT, l1_timer_act}, | |
291 | {ST_L1_F3, EV_TIMER_DEACT, l1_timer_deact}, | |
292 | {ST_L1_F4, EV_TIMER_DEACT, l1_timer_deact}, | |
293 | {ST_L1_F5, EV_TIMER_DEACT, l1_timer_deact}, | |
294 | {ST_L1_F6, EV_TIMER_DEACT, l1_timer_deact}, | |
295 | {ST_L1_F7, EV_TIMER_DEACT, l1_timer_deact}, | |
296 | {ST_L1_F8, EV_TIMER_DEACT, l1_timer_deact}, | |
297 | }; | |
298 | ||
299 | static void | |
300 | release_l1(struct layer1 *l1) { | |
301 | mISDN_FsmDelTimer(&l1->timer, 0); | |
302 | if (l1->dch) | |
303 | l1->dch->l1 = NULL; | |
304 | module_put(THIS_MODULE); | |
305 | kfree(l1); | |
306 | } | |
307 | ||
308 | int | |
309 | l1_event(struct layer1 *l1, u_int event) | |
310 | { | |
311 | int err = 0; | |
312 | ||
313 | if (!l1) | |
314 | return -EINVAL; | |
315 | switch (event) { | |
316 | case HW_RESET_IND: | |
317 | mISDN_FsmEvent(&l1->l1m, EV_RESET_IND, NULL); | |
318 | break; | |
319 | case HW_DEACT_IND: | |
320 | mISDN_FsmEvent(&l1->l1m, EV_DEACT_IND, NULL); | |
321 | break; | |
322 | case HW_POWERUP_IND: | |
323 | mISDN_FsmEvent(&l1->l1m, EV_POWER_UP, NULL); | |
324 | break; | |
325 | case HW_DEACT_CNF: | |
326 | mISDN_FsmEvent(&l1->l1m, EV_DEACT_CNF, NULL); | |
327 | break; | |
328 | case ANYSIGNAL: | |
329 | mISDN_FsmEvent(&l1->l1m, EV_ANYSIG_IND, NULL); | |
330 | break; | |
331 | case LOSTFRAMING: | |
332 | mISDN_FsmEvent(&l1->l1m, EV_ANYSIG_IND, NULL); | |
333 | break; | |
334 | case INFO2: | |
335 | mISDN_FsmEvent(&l1->l1m, EV_INFO2_IND, NULL); | |
336 | break; | |
337 | case INFO4_P8: | |
338 | mISDN_FsmEvent(&l1->l1m, EV_INFO4_IND, NULL); | |
339 | break; | |
340 | case INFO4_P10: | |
341 | mISDN_FsmEvent(&l1->l1m, EV_INFO4_IND, NULL); | |
342 | break; | |
343 | case PH_ACTIVATE_REQ: | |
344 | if (test_bit(FLG_L1_ACTIVATED, &l1->Flags)) | |
345 | l1->dcb(l1->dch, PH_ACTIVATE_IND); | |
346 | else { | |
347 | test_and_set_bit(FLG_L1_ACTIVATING, &l1->Flags); | |
348 | mISDN_FsmEvent(&l1->l1m, EV_PH_ACTIVATE, NULL); | |
349 | } | |
350 | break; | |
351 | case CLOSE_CHANNEL: | |
352 | release_l1(l1); | |
353 | break; | |
354 | default: | |
355 | if (*debug & DEBUG_L1) | |
356 | printk(KERN_DEBUG "%s %x unhandled\n", | |
357 | __func__, event); | |
358 | err = -EINVAL; | |
359 | } | |
360 | return err; | |
361 | } | |
362 | EXPORT_SYMBOL(l1_event); | |
363 | ||
364 | int | |
365 | create_l1(struct dchannel *dch, dchannel_l1callback *dcb) { | |
366 | struct layer1 *nl1; | |
367 | ||
368 | nl1 = kzalloc(sizeof(struct layer1), GFP_ATOMIC); | |
369 | if (!nl1) { | |
370 | printk(KERN_ERR "kmalloc struct layer1 failed\n"); | |
371 | return -ENOMEM; | |
372 | } | |
373 | nl1->l1m.fsm = &l1fsm_s; | |
374 | nl1->l1m.state = ST_L1_F3; | |
375 | nl1->Flags = 0; | |
376 | nl1->l1m.debug = *debug & DEBUG_L1_FSM; | |
377 | nl1->l1m.userdata = nl1; | |
378 | nl1->l1m.userint = 0; | |
379 | nl1->l1m.printdebug = l1m_debug; | |
380 | nl1->dch = dch; | |
381 | nl1->dcb = dcb; | |
382 | mISDN_FsmInitTimer(&nl1->l1m, &nl1->timer); | |
383 | __module_get(THIS_MODULE); | |
384 | dch->l1 = nl1; | |
385 | return 0; | |
386 | } | |
387 | EXPORT_SYMBOL(create_l1); | |
388 | ||
389 | int | |
390 | l1_init(u_int *deb) | |
391 | { | |
392 | debug = deb; | |
393 | l1fsm_s.state_count = L1S_STATE_COUNT; | |
394 | l1fsm_s.event_count = L1_EVENT_COUNT; | |
395 | l1fsm_s.strEvent = strL1Event; | |
396 | l1fsm_s.strState = strL1SState; | |
397 | mISDN_FsmNew(&l1fsm_s, L1SFnList, ARRAY_SIZE(L1SFnList)); | |
398 | return 0; | |
399 | } | |
400 | ||
401 | void | |
402 | l1_cleanup(void) | |
403 | { | |
404 | mISDN_FsmFree(&l1fsm_s); | |
405 | } |