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 19 #include <linux/slab.h> 20 #include <linux/module.h> 21 #include <linux/mISDNhw.h> 22 #include "core.h" 23 #include "layer1.h" 24 #include "fsm.h" 25 26 static u_int *debug; 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); 105 printk(KERN_DEBUG "%s: ", dev_name(&l1->dch->dev.dev)); 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 } 406