1 /* 2 * isac.c ISAC specific routines 3 * 4 * Author Karsten Keil <keil@isdn4linux.de> 5 * 6 * Copyright 2009 by Karsten Keil <keil@isdn4linux.de> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 * 21 */ 22 23 #include <linux/irqreturn.h> 24 #include <linux/slab.h> 25 #include <linux/module.h> 26 #include <linux/mISDNhw.h> 27 #include "ipac.h" 28 29 30 #define DBUSY_TIMER_VALUE 80 31 #define ARCOFI_USE 1 32 33 #define ISAC_REV "2.0" 34 35 MODULE_AUTHOR("Karsten Keil"); 36 MODULE_VERSION(ISAC_REV); 37 MODULE_LICENSE("GPL v2"); 38 39 #define ReadISAC(is, o) (is->read_reg(is->dch.hw, o + is->off)) 40 #define WriteISAC(is, o, v) (is->write_reg(is->dch.hw, o + is->off, v)) 41 #define ReadHSCX(h, o) (h->ip->read_reg(h->ip->hw, h->off + o)) 42 #define WriteHSCX(h, o, v) (h->ip->write_reg(h->ip->hw, h->off + o, v)) 43 #define ReadIPAC(ip, o) (ip->read_reg(ip->hw, o)) 44 #define WriteIPAC(ip, o, v) (ip->write_reg(ip->hw, o, v)) 45 46 static inline void 47 ph_command(struct isac_hw *isac, u8 command) 48 { 49 pr_debug("%s: ph_command %x\n", isac->name, command); 50 if (isac->type & IPAC_TYPE_ISACX) 51 WriteISAC(isac, ISACX_CIX0, (command << 4) | 0xE); 52 else 53 WriteISAC(isac, ISAC_CIX0, (command << 2) | 3); 54 } 55 56 static void 57 isac_ph_state_change(struct isac_hw *isac) 58 { 59 switch (isac->state) { 60 case (ISAC_IND_RS): 61 case (ISAC_IND_EI): 62 ph_command(isac, ISAC_CMD_DUI); 63 } 64 schedule_event(&isac->dch, FLG_PHCHANGE); 65 } 66 67 static void 68 isac_ph_state_bh(struct dchannel *dch) 69 { 70 struct isac_hw *isac = container_of(dch, struct isac_hw, dch); 71 72 switch (isac->state) { 73 case ISAC_IND_RS: 74 case ISAC_IND_EI: 75 dch->state = 0; 76 l1_event(dch->l1, HW_RESET_IND); 77 break; 78 case ISAC_IND_DID: 79 dch->state = 3; 80 l1_event(dch->l1, HW_DEACT_CNF); 81 break; 82 case ISAC_IND_DR: 83 dch->state = 3; 84 l1_event(dch->l1, HW_DEACT_IND); 85 break; 86 case ISAC_IND_PU: 87 dch->state = 4; 88 l1_event(dch->l1, HW_POWERUP_IND); 89 break; 90 case ISAC_IND_RSY: 91 if (dch->state <= 5) { 92 dch->state = 5; 93 l1_event(dch->l1, ANYSIGNAL); 94 } else { 95 dch->state = 8; 96 l1_event(dch->l1, LOSTFRAMING); 97 } 98 break; 99 case ISAC_IND_ARD: 100 dch->state = 6; 101 l1_event(dch->l1, INFO2); 102 break; 103 case ISAC_IND_AI8: 104 dch->state = 7; 105 l1_event(dch->l1, INFO4_P8); 106 break; 107 case ISAC_IND_AI10: 108 dch->state = 7; 109 l1_event(dch->l1, INFO4_P10); 110 break; 111 } 112 pr_debug("%s: TE newstate %x\n", isac->name, dch->state); 113 } 114 115 void 116 isac_empty_fifo(struct isac_hw *isac, int count) 117 { 118 u8 *ptr; 119 120 pr_debug("%s: %s %d\n", isac->name, __func__, count); 121 122 if (!isac->dch.rx_skb) { 123 isac->dch.rx_skb = mI_alloc_skb(isac->dch.maxlen, GFP_ATOMIC); 124 if (!isac->dch.rx_skb) { 125 pr_info("%s: D receive out of memory\n", isac->name); 126 WriteISAC(isac, ISAC_CMDR, 0x80); 127 return; 128 } 129 } 130 if ((isac->dch.rx_skb->len + count) >= isac->dch.maxlen) { 131 pr_debug("%s: %s overrun %d\n", isac->name, __func__, 132 isac->dch.rx_skb->len + count); 133 WriteISAC(isac, ISAC_CMDR, 0x80); 134 return; 135 } 136 ptr = skb_put(isac->dch.rx_skb, count); 137 isac->read_fifo(isac->dch.hw, isac->off, ptr, count); 138 WriteISAC(isac, ISAC_CMDR, 0x80); 139 if (isac->dch.debug & DEBUG_HW_DFIFO) { 140 char pfx[MISDN_MAX_IDLEN + 16]; 141 142 snprintf(pfx, MISDN_MAX_IDLEN + 15, "D-recv %s %d ", 143 isac->name, count); 144 print_hex_dump_bytes(pfx, DUMP_PREFIX_OFFSET, ptr, count); 145 } 146 } 147 148 static void 149 isac_fill_fifo(struct isac_hw *isac) 150 { 151 int count, more; 152 u8 *ptr; 153 154 if (!isac->dch.tx_skb) 155 return; 156 count = isac->dch.tx_skb->len - isac->dch.tx_idx; 157 if (count <= 0) 158 return; 159 160 more = 0; 161 if (count > 32) { 162 more = !0; 163 count = 32; 164 } 165 pr_debug("%s: %s %d\n", isac->name, __func__, count); 166 ptr = isac->dch.tx_skb->data + isac->dch.tx_idx; 167 isac->dch.tx_idx += count; 168 isac->write_fifo(isac->dch.hw, isac->off, ptr, count); 169 WriteISAC(isac, ISAC_CMDR, more ? 0x8 : 0xa); 170 if (test_and_set_bit(FLG_BUSY_TIMER, &isac->dch.Flags)) { 171 pr_debug("%s: %s dbusytimer running\n", isac->name, __func__); 172 del_timer(&isac->dch.timer); 173 } 174 init_timer(&isac->dch.timer); 175 isac->dch.timer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ)/1000); 176 add_timer(&isac->dch.timer); 177 if (isac->dch.debug & DEBUG_HW_DFIFO) { 178 char pfx[MISDN_MAX_IDLEN + 16]; 179 180 snprintf(pfx, MISDN_MAX_IDLEN + 15, "D-send %s %d ", 181 isac->name, count); 182 print_hex_dump_bytes(pfx, DUMP_PREFIX_OFFSET, ptr, count); 183 } 184 } 185 186 static void 187 isac_rme_irq(struct isac_hw *isac) 188 { 189 u8 val, count; 190 191 val = ReadISAC(isac, ISAC_RSTA); 192 if ((val & 0x70) != 0x20) { 193 if (val & 0x40) { 194 pr_debug("%s: ISAC RDO\n", isac->name); 195 #ifdef ERROR_STATISTIC 196 isac->dch.err_rx++; 197 #endif 198 } 199 if (!(val & 0x20)) { 200 pr_debug("%s: ISAC CRC error\n", isac->name); 201 #ifdef ERROR_STATISTIC 202 isac->dch.err_crc++; 203 #endif 204 } 205 WriteISAC(isac, ISAC_CMDR, 0x80); 206 if (isac->dch.rx_skb) 207 dev_kfree_skb(isac->dch.rx_skb); 208 isac->dch.rx_skb = NULL; 209 } else { 210 count = ReadISAC(isac, ISAC_RBCL) & 0x1f; 211 if (count == 0) 212 count = 32; 213 isac_empty_fifo(isac, count); 214 recv_Dchannel(&isac->dch); 215 } 216 } 217 218 static void 219 isac_xpr_irq(struct isac_hw *isac) 220 { 221 if (test_and_clear_bit(FLG_BUSY_TIMER, &isac->dch.Flags)) 222 del_timer(&isac->dch.timer); 223 if (isac->dch.tx_skb && isac->dch.tx_idx < isac->dch.tx_skb->len) { 224 isac_fill_fifo(isac); 225 } else { 226 if (isac->dch.tx_skb) 227 dev_kfree_skb(isac->dch.tx_skb); 228 if (get_next_dframe(&isac->dch)) 229 isac_fill_fifo(isac); 230 } 231 } 232 233 static void 234 isac_retransmit(struct isac_hw *isac) 235 { 236 if (test_and_clear_bit(FLG_BUSY_TIMER, &isac->dch.Flags)) 237 del_timer(&isac->dch.timer); 238 if (test_bit(FLG_TX_BUSY, &isac->dch.Flags)) { 239 /* Restart frame */ 240 isac->dch.tx_idx = 0; 241 isac_fill_fifo(isac); 242 } else if (isac->dch.tx_skb) { /* should not happen */ 243 pr_info("%s: tx_skb exist but not busy\n", isac->name); 244 test_and_set_bit(FLG_TX_BUSY, &isac->dch.Flags); 245 isac->dch.tx_idx = 0; 246 isac_fill_fifo(isac); 247 } else { 248 pr_info("%s: ISAC XDU no TX_BUSY\n", isac->name); 249 if (get_next_dframe(&isac->dch)) 250 isac_fill_fifo(isac); 251 } 252 } 253 254 static void 255 isac_mos_irq(struct isac_hw *isac) 256 { 257 u8 val; 258 int ret; 259 260 val = ReadISAC(isac, ISAC_MOSR); 261 pr_debug("%s: ISAC MOSR %02x\n", isac->name, val); 262 #if ARCOFI_USE 263 if (val & 0x08) { 264 if (!isac->mon_rx) { 265 isac->mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC); 266 if (!isac->mon_rx) { 267 pr_info("%s: ISAC MON RX out of memory!\n", 268 isac->name); 269 isac->mocr &= 0xf0; 270 isac->mocr |= 0x0a; 271 WriteISAC(isac, ISAC_MOCR, isac->mocr); 272 goto afterMONR0; 273 } else 274 isac->mon_rxp = 0; 275 } 276 if (isac->mon_rxp >= MAX_MON_FRAME) { 277 isac->mocr &= 0xf0; 278 isac->mocr |= 0x0a; 279 WriteISAC(isac, ISAC_MOCR, isac->mocr); 280 isac->mon_rxp = 0; 281 pr_debug("%s: ISAC MON RX overflow!\n", isac->name); 282 goto afterMONR0; 283 } 284 isac->mon_rx[isac->mon_rxp++] = ReadISAC(isac, ISAC_MOR0); 285 pr_debug("%s: ISAC MOR0 %02x\n", isac->name, 286 isac->mon_rx[isac->mon_rxp - 1]); 287 if (isac->mon_rxp == 1) { 288 isac->mocr |= 0x04; 289 WriteISAC(isac, ISAC_MOCR, isac->mocr); 290 } 291 } 292 afterMONR0: 293 if (val & 0x80) { 294 if (!isac->mon_rx) { 295 isac->mon_rx = kmalloc(MAX_MON_FRAME, GFP_ATOMIC); 296 if (!isac->mon_rx) { 297 pr_info("%s: ISAC MON RX out of memory!\n", 298 isac->name); 299 isac->mocr &= 0x0f; 300 isac->mocr |= 0xa0; 301 WriteISAC(isac, ISAC_MOCR, isac->mocr); 302 goto afterMONR1; 303 } else 304 isac->mon_rxp = 0; 305 } 306 if (isac->mon_rxp >= MAX_MON_FRAME) { 307 isac->mocr &= 0x0f; 308 isac->mocr |= 0xa0; 309 WriteISAC(isac, ISAC_MOCR, isac->mocr); 310 isac->mon_rxp = 0; 311 pr_debug("%s: ISAC MON RX overflow!\n", isac->name); 312 goto afterMONR1; 313 } 314 isac->mon_rx[isac->mon_rxp++] = ReadISAC(isac, ISAC_MOR1); 315 pr_debug("%s: ISAC MOR1 %02x\n", isac->name, 316 isac->mon_rx[isac->mon_rxp - 1]); 317 isac->mocr |= 0x40; 318 WriteISAC(isac, ISAC_MOCR, isac->mocr); 319 } 320 afterMONR1: 321 if (val & 0x04) { 322 isac->mocr &= 0xf0; 323 WriteISAC(isac, ISAC_MOCR, isac->mocr); 324 isac->mocr |= 0x0a; 325 WriteISAC(isac, ISAC_MOCR, isac->mocr); 326 if (isac->monitor) { 327 ret = isac->monitor(isac->dch.hw, MONITOR_RX_0, 328 isac->mon_rx, isac->mon_rxp); 329 if (ret) 330 kfree(isac->mon_rx); 331 } else { 332 pr_info("%s: MONITOR 0 received %d but no user\n", 333 isac->name, isac->mon_rxp); 334 kfree(isac->mon_rx); 335 } 336 isac->mon_rx = NULL; 337 isac->mon_rxp = 0; 338 } 339 if (val & 0x40) { 340 isac->mocr &= 0x0f; 341 WriteISAC(isac, ISAC_MOCR, isac->mocr); 342 isac->mocr |= 0xa0; 343 WriteISAC(isac, ISAC_MOCR, isac->mocr); 344 if (isac->monitor) { 345 ret = isac->monitor(isac->dch.hw, MONITOR_RX_1, 346 isac->mon_rx, isac->mon_rxp); 347 if (ret) 348 kfree(isac->mon_rx); 349 } else { 350 pr_info("%s: MONITOR 1 received %d but no user\n", 351 isac->name, isac->mon_rxp); 352 kfree(isac->mon_rx); 353 } 354 isac->mon_rx = NULL; 355 isac->mon_rxp = 0; 356 } 357 if (val & 0x02) { 358 if ((!isac->mon_tx) || (isac->mon_txc && 359 (isac->mon_txp >= isac->mon_txc) && !(val & 0x08))) { 360 isac->mocr &= 0xf0; 361 WriteISAC(isac, ISAC_MOCR, isac->mocr); 362 isac->mocr |= 0x0a; 363 WriteISAC(isac, ISAC_MOCR, isac->mocr); 364 if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) { 365 if (isac->monitor) 366 ret = isac->monitor(isac->dch.hw, 367 MONITOR_TX_0, NULL, 0); 368 } 369 kfree(isac->mon_tx); 370 isac->mon_tx = NULL; 371 isac->mon_txc = 0; 372 isac->mon_txp = 0; 373 goto AfterMOX0; 374 } 375 if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) { 376 if (isac->monitor) 377 ret = isac->monitor(isac->dch.hw, 378 MONITOR_TX_0, NULL, 0); 379 kfree(isac->mon_tx); 380 isac->mon_tx = NULL; 381 isac->mon_txc = 0; 382 isac->mon_txp = 0; 383 goto AfterMOX0; 384 } 385 WriteISAC(isac, ISAC_MOX0, isac->mon_tx[isac->mon_txp++]); 386 pr_debug("%s: ISAC %02x -> MOX0\n", isac->name, 387 isac->mon_tx[isac->mon_txp - 1]); 388 } 389 AfterMOX0: 390 if (val & 0x20) { 391 if ((!isac->mon_tx) || (isac->mon_txc && 392 (isac->mon_txp >= isac->mon_txc) && !(val & 0x80))) { 393 isac->mocr &= 0x0f; 394 WriteISAC(isac, ISAC_MOCR, isac->mocr); 395 isac->mocr |= 0xa0; 396 WriteISAC(isac, ISAC_MOCR, isac->mocr); 397 if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) { 398 if (isac->monitor) 399 ret = isac->monitor(isac->dch.hw, 400 MONITOR_TX_1, NULL, 0); 401 } 402 kfree(isac->mon_tx); 403 isac->mon_tx = NULL; 404 isac->mon_txc = 0; 405 isac->mon_txp = 0; 406 goto AfterMOX1; 407 } 408 if (isac->mon_txc && (isac->mon_txp >= isac->mon_txc)) { 409 if (isac->monitor) 410 ret = isac->monitor(isac->dch.hw, 411 MONITOR_TX_1, NULL, 0); 412 kfree(isac->mon_tx); 413 isac->mon_tx = NULL; 414 isac->mon_txc = 0; 415 isac->mon_txp = 0; 416 goto AfterMOX1; 417 } 418 WriteISAC(isac, ISAC_MOX1, isac->mon_tx[isac->mon_txp++]); 419 pr_debug("%s: ISAC %02x -> MOX1\n", isac->name, 420 isac->mon_tx[isac->mon_txp - 1]); 421 } 422 AfterMOX1: 423 val = 0; /* dummy to avoid warning */ 424 #endif 425 } 426 427 static void 428 isac_cisq_irq(struct isac_hw *isac) { 429 u8 val; 430 431 val = ReadISAC(isac, ISAC_CIR0); 432 pr_debug("%s: ISAC CIR0 %02X\n", isac->name, val); 433 if (val & 2) { 434 pr_debug("%s: ph_state change %x->%x\n", isac->name, 435 isac->state, (val >> 2) & 0xf); 436 isac->state = (val >> 2) & 0xf; 437 isac_ph_state_change(isac); 438 } 439 if (val & 1) { 440 val = ReadISAC(isac, ISAC_CIR1); 441 pr_debug("%s: ISAC CIR1 %02X\n", isac->name, val); 442 } 443 } 444 445 static void 446 isacsx_cic_irq(struct isac_hw *isac) 447 { 448 u8 val; 449 450 val = ReadISAC(isac, ISACX_CIR0); 451 pr_debug("%s: ISACX CIR0 %02X\n", isac->name, val); 452 if (val & ISACX_CIR0_CIC0) { 453 pr_debug("%s: ph_state change %x->%x\n", isac->name, 454 isac->state, val >> 4); 455 isac->state = val >> 4; 456 isac_ph_state_change(isac); 457 } 458 } 459 460 static void 461 isacsx_rme_irq(struct isac_hw *isac) 462 { 463 int count; 464 u8 val; 465 466 val = ReadISAC(isac, ISACX_RSTAD); 467 if ((val & (ISACX_RSTAD_VFR | 468 ISACX_RSTAD_RDO | 469 ISACX_RSTAD_CRC | 470 ISACX_RSTAD_RAB)) 471 != (ISACX_RSTAD_VFR | ISACX_RSTAD_CRC)) { 472 pr_debug("%s: RSTAD %#x, dropped\n", isac->name, val); 473 #ifdef ERROR_STATISTIC 474 if (val & ISACX_RSTAD_CRC) 475 isac->dch.err_rx++; 476 else 477 isac->dch.err_crc++; 478 #endif 479 WriteISAC(isac, ISACX_CMDRD, ISACX_CMDRD_RMC); 480 if (isac->dch.rx_skb) 481 dev_kfree_skb(isac->dch.rx_skb); 482 isac->dch.rx_skb = NULL; 483 } else { 484 count = ReadISAC(isac, ISACX_RBCLD) & 0x1f; 485 if (count == 0) 486 count = 32; 487 isac_empty_fifo(isac, count); 488 if (isac->dch.rx_skb) { 489 skb_trim(isac->dch.rx_skb, isac->dch.rx_skb->len - 1); 490 pr_debug("%s: dchannel received %d\n", isac->name, 491 isac->dch.rx_skb->len); 492 recv_Dchannel(&isac->dch); 493 } 494 } 495 } 496 497 irqreturn_t 498 mISDNisac_irq(struct isac_hw *isac, u8 val) 499 { 500 if (unlikely(!val)) 501 return IRQ_NONE; 502 pr_debug("%s: ISAC interrupt %02x\n", isac->name, val); 503 if (isac->type & IPAC_TYPE_ISACX) { 504 if (val & ISACX__CIC) 505 isacsx_cic_irq(isac); 506 if (val & ISACX__ICD) { 507 val = ReadISAC(isac, ISACX_ISTAD); 508 pr_debug("%s: ISTAD %02x\n", isac->name, val); 509 if (val & ISACX_D_XDU) { 510 pr_debug("%s: ISAC XDU\n", isac->name); 511 #ifdef ERROR_STATISTIC 512 isac->dch.err_tx++; 513 #endif 514 isac_retransmit(isac); 515 } 516 if (val & ISACX_D_XMR) { 517 pr_debug("%s: ISAC XMR\n", isac->name); 518 #ifdef ERROR_STATISTIC 519 isac->dch.err_tx++; 520 #endif 521 isac_retransmit(isac); 522 } 523 if (val & ISACX_D_XPR) 524 isac_xpr_irq(isac); 525 if (val & ISACX_D_RFO) { 526 pr_debug("%s: ISAC RFO\n", isac->name); 527 WriteISAC(isac, ISACX_CMDRD, ISACX_CMDRD_RMC); 528 } 529 if (val & ISACX_D_RME) 530 isacsx_rme_irq(isac); 531 if (val & ISACX_D_RPF) 532 isac_empty_fifo(isac, 0x20); 533 } 534 } else { 535 if (val & 0x80) /* RME */ 536 isac_rme_irq(isac); 537 if (val & 0x40) /* RPF */ 538 isac_empty_fifo(isac, 32); 539 if (val & 0x10) /* XPR */ 540 isac_xpr_irq(isac); 541 if (val & 0x04) /* CISQ */ 542 isac_cisq_irq(isac); 543 if (val & 0x20) /* RSC - never */ 544 pr_debug("%s: ISAC RSC interrupt\n", isac->name); 545 if (val & 0x02) /* SIN - never */ 546 pr_debug("%s: ISAC SIN interrupt\n", isac->name); 547 if (val & 0x01) { /* EXI */ 548 val = ReadISAC(isac, ISAC_EXIR); 549 pr_debug("%s: ISAC EXIR %02x\n", isac->name, val); 550 if (val & 0x80) /* XMR */ 551 pr_debug("%s: ISAC XMR\n", isac->name); 552 if (val & 0x40) { /* XDU */ 553 pr_debug("%s: ISAC XDU\n", isac->name); 554 #ifdef ERROR_STATISTIC 555 isac->dch.err_tx++; 556 #endif 557 isac_retransmit(isac); 558 } 559 if (val & 0x04) /* MOS */ 560 isac_mos_irq(isac); 561 } 562 } 563 return IRQ_HANDLED; 564 } 565 EXPORT_SYMBOL(mISDNisac_irq); 566 567 static int 568 isac_l1hw(struct mISDNchannel *ch, struct sk_buff *skb) 569 { 570 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); 571 struct dchannel *dch = container_of(dev, struct dchannel, dev); 572 struct isac_hw *isac = container_of(dch, struct isac_hw, dch); 573 int ret = -EINVAL; 574 struct mISDNhead *hh = mISDN_HEAD_P(skb); 575 u32 id; 576 u_long flags; 577 578 switch (hh->prim) { 579 case PH_DATA_REQ: 580 spin_lock_irqsave(isac->hwlock, flags); 581 ret = dchannel_senddata(dch, skb); 582 if (ret > 0) { /* direct TX */ 583 id = hh->id; /* skb can be freed */ 584 isac_fill_fifo(isac); 585 ret = 0; 586 spin_unlock_irqrestore(isac->hwlock, flags); 587 queue_ch_frame(ch, PH_DATA_CNF, id, NULL); 588 } else 589 spin_unlock_irqrestore(isac->hwlock, flags); 590 return ret; 591 case PH_ACTIVATE_REQ: 592 ret = l1_event(dch->l1, hh->prim); 593 break; 594 case PH_DEACTIVATE_REQ: 595 test_and_clear_bit(FLG_L2_ACTIVATED, &dch->Flags); 596 ret = l1_event(dch->l1, hh->prim); 597 break; 598 } 599 600 if (!ret) 601 dev_kfree_skb(skb); 602 return ret; 603 } 604 605 static int 606 isac_ctrl(struct isac_hw *isac, u32 cmd, unsigned long para) 607 { 608 u8 tl = 0; 609 unsigned long flags; 610 int ret = 0; 611 612 switch (cmd) { 613 case HW_TESTLOOP: 614 spin_lock_irqsave(isac->hwlock, flags); 615 if (!(isac->type & IPAC_TYPE_ISACX)) { 616 /* TODO: implement for IPAC_TYPE_ISACX */ 617 if (para & 1) /* B1 */ 618 tl |= 0x0c; 619 else if (para & 2) /* B2 */ 620 tl |= 0x3; 621 /* we only support IOM2 mode */ 622 WriteISAC(isac, ISAC_SPCR, tl); 623 if (tl) 624 WriteISAC(isac, ISAC_ADF1, 0x8); 625 else 626 WriteISAC(isac, ISAC_ADF1, 0x0); 627 } 628 spin_unlock_irqrestore(isac->hwlock, flags); 629 break; 630 case HW_TIMER3_VALUE: 631 ret = l1_event(isac->dch.l1, HW_TIMER3_VALUE | (para & 0xff)); 632 break; 633 default: 634 pr_debug("%s: %s unknown command %x %lx\n", isac->name, 635 __func__, cmd, para); 636 ret = -1; 637 } 638 return ret; 639 } 640 641 static int 642 isac_l1cmd(struct dchannel *dch, u32 cmd) 643 { 644 struct isac_hw *isac = container_of(dch, struct isac_hw, dch); 645 u_long flags; 646 647 pr_debug("%s: cmd(%x) state(%02x)\n", isac->name, cmd, isac->state); 648 switch (cmd) { 649 case INFO3_P8: 650 spin_lock_irqsave(isac->hwlock, flags); 651 ph_command(isac, ISAC_CMD_AR8); 652 spin_unlock_irqrestore(isac->hwlock, flags); 653 break; 654 case INFO3_P10: 655 spin_lock_irqsave(isac->hwlock, flags); 656 ph_command(isac, ISAC_CMD_AR10); 657 spin_unlock_irqrestore(isac->hwlock, flags); 658 break; 659 case HW_RESET_REQ: 660 spin_lock_irqsave(isac->hwlock, flags); 661 if ((isac->state == ISAC_IND_EI) || 662 (isac->state == ISAC_IND_DR) || 663 (isac->state == ISAC_IND_RS)) 664 ph_command(isac, ISAC_CMD_TIM); 665 else 666 ph_command(isac, ISAC_CMD_RS); 667 spin_unlock_irqrestore(isac->hwlock, flags); 668 break; 669 case HW_DEACT_REQ: 670 skb_queue_purge(&dch->squeue); 671 if (dch->tx_skb) { 672 dev_kfree_skb(dch->tx_skb); 673 dch->tx_skb = NULL; 674 } 675 dch->tx_idx = 0; 676 if (dch->rx_skb) { 677 dev_kfree_skb(dch->rx_skb); 678 dch->rx_skb = NULL; 679 } 680 test_and_clear_bit(FLG_TX_BUSY, &dch->Flags); 681 if (test_and_clear_bit(FLG_BUSY_TIMER, &dch->Flags)) 682 del_timer(&dch->timer); 683 break; 684 case HW_POWERUP_REQ: 685 spin_lock_irqsave(isac->hwlock, flags); 686 ph_command(isac, ISAC_CMD_TIM); 687 spin_unlock_irqrestore(isac->hwlock, flags); 688 break; 689 case PH_ACTIVATE_IND: 690 test_and_set_bit(FLG_ACTIVE, &dch->Flags); 691 _queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL, 692 GFP_ATOMIC); 693 break; 694 case PH_DEACTIVATE_IND: 695 test_and_clear_bit(FLG_ACTIVE, &dch->Flags); 696 _queue_data(&dch->dev.D, cmd, MISDN_ID_ANY, 0, NULL, 697 GFP_ATOMIC); 698 break; 699 default: 700 pr_debug("%s: %s unknown command %x\n", isac->name, 701 __func__, cmd); 702 return -1; 703 } 704 return 0; 705 } 706 707 static void 708 isac_release(struct isac_hw *isac) 709 { 710 if (isac->type & IPAC_TYPE_ISACX) 711 WriteISAC(isac, ISACX_MASK, 0xff); 712 else 713 WriteISAC(isac, ISAC_MASK, 0xff); 714 if (isac->dch.timer.function != NULL) { 715 del_timer(&isac->dch.timer); 716 isac->dch.timer.function = NULL; 717 } 718 kfree(isac->mon_rx); 719 isac->mon_rx = NULL; 720 kfree(isac->mon_tx); 721 isac->mon_tx = NULL; 722 if (isac->dch.l1) 723 l1_event(isac->dch.l1, CLOSE_CHANNEL); 724 mISDN_freedchannel(&isac->dch); 725 } 726 727 static void 728 dbusy_timer_handler(struct isac_hw *isac) 729 { 730 int rbch, star; 731 u_long flags; 732 733 if (test_bit(FLG_BUSY_TIMER, &isac->dch.Flags)) { 734 spin_lock_irqsave(isac->hwlock, flags); 735 rbch = ReadISAC(isac, ISAC_RBCH); 736 star = ReadISAC(isac, ISAC_STAR); 737 pr_debug("%s: D-Channel Busy RBCH %02x STAR %02x\n", 738 isac->name, rbch, star); 739 if (rbch & ISAC_RBCH_XAC) /* D-Channel Busy */ 740 test_and_set_bit(FLG_L1_BUSY, &isac->dch.Flags); 741 else { 742 /* discard frame; reset transceiver */ 743 test_and_clear_bit(FLG_BUSY_TIMER, &isac->dch.Flags); 744 if (isac->dch.tx_idx) 745 isac->dch.tx_idx = 0; 746 else 747 pr_info("%s: ISAC D-Channel Busy no tx_idx\n", 748 isac->name); 749 /* Transmitter reset */ 750 WriteISAC(isac, ISAC_CMDR, 0x01); 751 } 752 spin_unlock_irqrestore(isac->hwlock, flags); 753 } 754 } 755 756 static int 757 open_dchannel_caller(struct isac_hw *isac, struct channel_req *rq, void *caller) 758 { 759 pr_debug("%s: %s dev(%d) open from %p\n", isac->name, __func__, 760 isac->dch.dev.id, caller); 761 if (rq->protocol != ISDN_P_TE_S0) 762 return -EINVAL; 763 if (rq->adr.channel == 1) 764 /* E-Channel not supported */ 765 return -EINVAL; 766 rq->ch = &isac->dch.dev.D; 767 rq->ch->protocol = rq->protocol; 768 if (isac->dch.state == 7) 769 _queue_data(rq->ch, PH_ACTIVATE_IND, MISDN_ID_ANY, 770 0, NULL, GFP_KERNEL); 771 return 0; 772 } 773 774 static int 775 open_dchannel(struct isac_hw *isac, struct channel_req *rq) 776 { 777 return open_dchannel_caller(isac, rq, __builtin_return_address(0)); 778 } 779 780 static const char *ISACVer[] = 781 {"2086/2186 V1.1", "2085 B1", "2085 B2", 782 "2085 V2.3"}; 783 784 static int 785 isac_init(struct isac_hw *isac) 786 { 787 u8 val; 788 int err = 0; 789 790 if (!isac->dch.l1) { 791 err = create_l1(&isac->dch, isac_l1cmd); 792 if (err) 793 return err; 794 } 795 isac->mon_tx = NULL; 796 isac->mon_rx = NULL; 797 isac->dch.timer.function = (void *) dbusy_timer_handler; 798 isac->dch.timer.data = (long)isac; 799 init_timer(&isac->dch.timer); 800 isac->mocr = 0xaa; 801 if (isac->type & IPAC_TYPE_ISACX) { 802 /* Disable all IRQ */ 803 WriteISAC(isac, ISACX_MASK, 0xff); 804 val = ReadISAC(isac, ISACX_STARD); 805 pr_debug("%s: ISACX STARD %x\n", isac->name, val); 806 val = ReadISAC(isac, ISACX_ISTAD); 807 pr_debug("%s: ISACX ISTAD %x\n", isac->name, val); 808 val = ReadISAC(isac, ISACX_ISTA); 809 pr_debug("%s: ISACX ISTA %x\n", isac->name, val); 810 /* clear LDD */ 811 WriteISAC(isac, ISACX_TR_CONF0, 0x00); 812 /* enable transmitter */ 813 WriteISAC(isac, ISACX_TR_CONF2, 0x00); 814 /* transparent mode 0, RAC, stop/go */ 815 WriteISAC(isac, ISACX_MODED, 0xc9); 816 /* all HDLC IRQ unmasked */ 817 val = ReadISAC(isac, ISACX_ID); 818 if (isac->dch.debug & DEBUG_HW) 819 pr_notice("%s: ISACX Design ID %x\n", 820 isac->name, val & 0x3f); 821 val = ReadISAC(isac, ISACX_CIR0); 822 pr_debug("%s: ISACX CIR0 %02X\n", isac->name, val); 823 isac->state = val >> 4; 824 isac_ph_state_change(isac); 825 ph_command(isac, ISAC_CMD_RS); 826 WriteISAC(isac, ISACX_MASK, IPACX__ON); 827 WriteISAC(isac, ISACX_MASKD, 0x00); 828 } else { /* old isac */ 829 WriteISAC(isac, ISAC_MASK, 0xff); 830 val = ReadISAC(isac, ISAC_STAR); 831 pr_debug("%s: ISAC STAR %x\n", isac->name, val); 832 val = ReadISAC(isac, ISAC_MODE); 833 pr_debug("%s: ISAC MODE %x\n", isac->name, val); 834 val = ReadISAC(isac, ISAC_ADF2); 835 pr_debug("%s: ISAC ADF2 %x\n", isac->name, val); 836 val = ReadISAC(isac, ISAC_ISTA); 837 pr_debug("%s: ISAC ISTA %x\n", isac->name, val); 838 if (val & 0x01) { 839 val = ReadISAC(isac, ISAC_EXIR); 840 pr_debug("%s: ISAC EXIR %x\n", isac->name, val); 841 } 842 val = ReadISAC(isac, ISAC_RBCH); 843 if (isac->dch.debug & DEBUG_HW) 844 pr_notice("%s: ISAC version (%x): %s\n", isac->name, 845 val, ISACVer[(val >> 5) & 3]); 846 isac->type |= ((val >> 5) & 3); 847 if (!isac->adf2) 848 isac->adf2 = 0x80; 849 if (!(isac->adf2 & 0x80)) { /* only IOM 2 Mode */ 850 pr_info("%s: only support IOM2 mode but adf2=%02x\n", 851 isac->name, isac->adf2); 852 isac_release(isac); 853 return -EINVAL; 854 } 855 WriteISAC(isac, ISAC_ADF2, isac->adf2); 856 WriteISAC(isac, ISAC_SQXR, 0x2f); 857 WriteISAC(isac, ISAC_SPCR, 0x00); 858 WriteISAC(isac, ISAC_STCR, 0x70); 859 WriteISAC(isac, ISAC_MODE, 0xc9); 860 WriteISAC(isac, ISAC_TIMR, 0x00); 861 WriteISAC(isac, ISAC_ADF1, 0x00); 862 val = ReadISAC(isac, ISAC_CIR0); 863 pr_debug("%s: ISAC CIR0 %x\n", isac->name, val); 864 isac->state = (val >> 2) & 0xf; 865 isac_ph_state_change(isac); 866 ph_command(isac, ISAC_CMD_RS); 867 WriteISAC(isac, ISAC_MASK, 0); 868 } 869 return err; 870 } 871 872 int 873 mISDNisac_init(struct isac_hw *isac, void *hw) 874 { 875 mISDN_initdchannel(&isac->dch, MAX_DFRAME_LEN_L1, isac_ph_state_bh); 876 isac->dch.hw = hw; 877 isac->dch.dev.D.send = isac_l1hw; 878 isac->init = isac_init; 879 isac->release = isac_release; 880 isac->ctrl = isac_ctrl; 881 isac->open = open_dchannel; 882 isac->dch.dev.Dprotocols = (1 << ISDN_P_TE_S0); 883 isac->dch.dev.nrbchan = 2; 884 return 0; 885 } 886 EXPORT_SYMBOL(mISDNisac_init); 887 888 static void 889 waitforCEC(struct hscx_hw *hx) 890 { 891 u8 starb, to = 50; 892 893 while (to) { 894 starb = ReadHSCX(hx, IPAC_STARB); 895 if (!(starb & 0x04)) 896 break; 897 udelay(1); 898 to--; 899 } 900 if (to < 50) 901 pr_debug("%s: B%1d CEC %d us\n", hx->ip->name, hx->bch.nr, 902 50 - to); 903 if (!to) 904 pr_info("%s: B%1d CEC timeout\n", hx->ip->name, hx->bch.nr); 905 } 906 907 908 static void 909 waitforXFW(struct hscx_hw *hx) 910 { 911 u8 starb, to = 50; 912 913 while (to) { 914 starb = ReadHSCX(hx, IPAC_STARB); 915 if ((starb & 0x44) == 0x40) 916 break; 917 udelay(1); 918 to--; 919 } 920 if (to < 50) 921 pr_debug("%s: B%1d XFW %d us\n", hx->ip->name, hx->bch.nr, 922 50 - to); 923 if (!to) 924 pr_info("%s: B%1d XFW timeout\n", hx->ip->name, hx->bch.nr); 925 } 926 927 static void 928 hscx_cmdr(struct hscx_hw *hx, u8 cmd) 929 { 930 if (hx->ip->type & IPAC_TYPE_IPACX) 931 WriteHSCX(hx, IPACX_CMDRB, cmd); 932 else { 933 waitforCEC(hx); 934 WriteHSCX(hx, IPAC_CMDRB, cmd); 935 } 936 } 937 938 static void 939 hscx_empty_fifo(struct hscx_hw *hscx, u8 count) 940 { 941 u8 *p; 942 int maxlen; 943 944 pr_debug("%s: B%1d %d\n", hscx->ip->name, hscx->bch.nr, count); 945 if (test_bit(FLG_RX_OFF, &hscx->bch.Flags)) { 946 hscx->bch.dropcnt += count; 947 hscx_cmdr(hscx, 0x80); /* RMC */ 948 return; 949 } 950 maxlen = bchannel_get_rxbuf(&hscx->bch, count); 951 if (maxlen < 0) { 952 hscx_cmdr(hscx, 0x80); /* RMC */ 953 if (hscx->bch.rx_skb) 954 skb_trim(hscx->bch.rx_skb, 0); 955 pr_warning("%s.B%d: No bufferspace for %d bytes\n", 956 hscx->ip->name, hscx->bch.nr, count); 957 return; 958 } 959 p = skb_put(hscx->bch.rx_skb, count); 960 961 if (hscx->ip->type & IPAC_TYPE_IPACX) 962 hscx->ip->read_fifo(hscx->ip->hw, 963 hscx->off + IPACX_RFIFOB, p, count); 964 else 965 hscx->ip->read_fifo(hscx->ip->hw, 966 hscx->off, p, count); 967 968 hscx_cmdr(hscx, 0x80); /* RMC */ 969 970 if (hscx->bch.debug & DEBUG_HW_BFIFO) { 971 snprintf(hscx->log, 64, "B%1d-recv %s %d ", 972 hscx->bch.nr, hscx->ip->name, count); 973 print_hex_dump_bytes(hscx->log, DUMP_PREFIX_OFFSET, p, count); 974 } 975 } 976 977 static void 978 hscx_fill_fifo(struct hscx_hw *hscx) 979 { 980 int count, more; 981 u8 *p; 982 983 if (!hscx->bch.tx_skb) { 984 if (!test_bit(FLG_TX_EMPTY, &hscx->bch.Flags)) 985 return; 986 count = hscx->fifo_size; 987 more = 1; 988 p = hscx->log; 989 memset(p, hscx->bch.fill[0], count); 990 } else { 991 count = hscx->bch.tx_skb->len - hscx->bch.tx_idx; 992 if (count <= 0) 993 return; 994 p = hscx->bch.tx_skb->data + hscx->bch.tx_idx; 995 996 more = test_bit(FLG_TRANSPARENT, &hscx->bch.Flags) ? 1 : 0; 997 if (count > hscx->fifo_size) { 998 count = hscx->fifo_size; 999 more = 1; 1000 } 1001 pr_debug("%s: B%1d %d/%d/%d\n", hscx->ip->name, hscx->bch.nr, 1002 count, hscx->bch.tx_idx, hscx->bch.tx_skb->len); 1003 hscx->bch.tx_idx += count; 1004 } 1005 if (hscx->ip->type & IPAC_TYPE_IPACX) 1006 hscx->ip->write_fifo(hscx->ip->hw, 1007 hscx->off + IPACX_XFIFOB, p, count); 1008 else { 1009 waitforXFW(hscx); 1010 hscx->ip->write_fifo(hscx->ip->hw, 1011 hscx->off, p, count); 1012 } 1013 hscx_cmdr(hscx, more ? 0x08 : 0x0a); 1014 1015 if (hscx->bch.tx_skb && (hscx->bch.debug & DEBUG_HW_BFIFO)) { 1016 snprintf(hscx->log, 64, "B%1d-send %s %d ", 1017 hscx->bch.nr, hscx->ip->name, count); 1018 print_hex_dump_bytes(hscx->log, DUMP_PREFIX_OFFSET, p, count); 1019 } 1020 } 1021 1022 static void 1023 hscx_xpr(struct hscx_hw *hx) 1024 { 1025 if (hx->bch.tx_skb && hx->bch.tx_idx < hx->bch.tx_skb->len) { 1026 hscx_fill_fifo(hx); 1027 } else { 1028 if (hx->bch.tx_skb) 1029 dev_kfree_skb(hx->bch.tx_skb); 1030 if (get_next_bframe(&hx->bch)) { 1031 hscx_fill_fifo(hx); 1032 test_and_clear_bit(FLG_TX_EMPTY, &hx->bch.Flags); 1033 } else if (test_bit(FLG_TX_EMPTY, &hx->bch.Flags)) { 1034 hscx_fill_fifo(hx); 1035 } 1036 } 1037 } 1038 1039 static void 1040 ipac_rme(struct hscx_hw *hx) 1041 { 1042 int count; 1043 u8 rstab; 1044 1045 if (hx->ip->type & IPAC_TYPE_IPACX) 1046 rstab = ReadHSCX(hx, IPACX_RSTAB); 1047 else 1048 rstab = ReadHSCX(hx, IPAC_RSTAB); 1049 pr_debug("%s: B%1d RSTAB %02x\n", hx->ip->name, hx->bch.nr, rstab); 1050 if ((rstab & 0xf0) != 0xa0) { 1051 /* !(VFR && !RDO && CRC && !RAB) */ 1052 if (!(rstab & 0x80)) { 1053 if (hx->bch.debug & DEBUG_HW_BCHANNEL) 1054 pr_notice("%s: B%1d invalid frame\n", 1055 hx->ip->name, hx->bch.nr); 1056 } 1057 if (rstab & 0x40) { 1058 if (hx->bch.debug & DEBUG_HW_BCHANNEL) 1059 pr_notice("%s: B%1d RDO proto=%x\n", 1060 hx->ip->name, hx->bch.nr, 1061 hx->bch.state); 1062 } 1063 if (!(rstab & 0x20)) { 1064 if (hx->bch.debug & DEBUG_HW_BCHANNEL) 1065 pr_notice("%s: B%1d CRC error\n", 1066 hx->ip->name, hx->bch.nr); 1067 } 1068 hscx_cmdr(hx, 0x80); /* Do RMC */ 1069 return; 1070 } 1071 if (hx->ip->type & IPAC_TYPE_IPACX) 1072 count = ReadHSCX(hx, IPACX_RBCLB); 1073 else 1074 count = ReadHSCX(hx, IPAC_RBCLB); 1075 count &= (hx->fifo_size - 1); 1076 if (count == 0) 1077 count = hx->fifo_size; 1078 hscx_empty_fifo(hx, count); 1079 if (!hx->bch.rx_skb) 1080 return; 1081 if (hx->bch.rx_skb->len < 2) { 1082 pr_debug("%s: B%1d frame to short %d\n", 1083 hx->ip->name, hx->bch.nr, hx->bch.rx_skb->len); 1084 skb_trim(hx->bch.rx_skb, 0); 1085 } else { 1086 skb_trim(hx->bch.rx_skb, hx->bch.rx_skb->len - 1); 1087 recv_Bchannel(&hx->bch, 0, false); 1088 } 1089 } 1090 1091 static void 1092 ipac_irq(struct hscx_hw *hx, u8 ista) 1093 { 1094 u8 istab, m, exirb = 0; 1095 1096 if (hx->ip->type & IPAC_TYPE_IPACX) 1097 istab = ReadHSCX(hx, IPACX_ISTAB); 1098 else if (hx->ip->type & IPAC_TYPE_IPAC) { 1099 istab = ReadHSCX(hx, IPAC_ISTAB); 1100 m = (hx->bch.nr & 1) ? IPAC__EXA : IPAC__EXB; 1101 if (m & ista) { 1102 exirb = ReadHSCX(hx, IPAC_EXIRB); 1103 pr_debug("%s: B%1d EXIRB %02x\n", hx->ip->name, 1104 hx->bch.nr, exirb); 1105 } 1106 } else if (hx->bch.nr & 2) { /* HSCX B */ 1107 if (ista & (HSCX__EXA | HSCX__ICA)) 1108 ipac_irq(&hx->ip->hscx[0], ista); 1109 if (ista & HSCX__EXB) { 1110 exirb = ReadHSCX(hx, IPAC_EXIRB); 1111 pr_debug("%s: B%1d EXIRB %02x\n", hx->ip->name, 1112 hx->bch.nr, exirb); 1113 } 1114 istab = ista & 0xF8; 1115 } else { /* HSCX A */ 1116 istab = ReadHSCX(hx, IPAC_ISTAB); 1117 if (ista & HSCX__EXA) { 1118 exirb = ReadHSCX(hx, IPAC_EXIRB); 1119 pr_debug("%s: B%1d EXIRB %02x\n", hx->ip->name, 1120 hx->bch.nr, exirb); 1121 } 1122 istab = istab & 0xF8; 1123 } 1124 if (exirb & IPAC_B_XDU) 1125 istab |= IPACX_B_XDU; 1126 if (exirb & IPAC_B_RFO) 1127 istab |= IPACX_B_RFO; 1128 pr_debug("%s: B%1d ISTAB %02x\n", hx->ip->name, hx->bch.nr, istab); 1129 1130 if (!test_bit(FLG_ACTIVE, &hx->bch.Flags)) 1131 return; 1132 1133 if (istab & IPACX_B_RME) 1134 ipac_rme(hx); 1135 1136 if (istab & IPACX_B_RPF) { 1137 hscx_empty_fifo(hx, hx->fifo_size); 1138 if (test_bit(FLG_TRANSPARENT, &hx->bch.Flags)) 1139 recv_Bchannel(&hx->bch, 0, false); 1140 } 1141 1142 if (istab & IPACX_B_RFO) { 1143 pr_debug("%s: B%1d RFO error\n", hx->ip->name, hx->bch.nr); 1144 hscx_cmdr(hx, 0x40); /* RRES */ 1145 } 1146 1147 if (istab & IPACX_B_XPR) 1148 hscx_xpr(hx); 1149 1150 if (istab & IPACX_B_XDU) { 1151 if (test_bit(FLG_TRANSPARENT, &hx->bch.Flags)) { 1152 if (test_bit(FLG_FILLEMPTY, &hx->bch.Flags)) 1153 test_and_set_bit(FLG_TX_EMPTY, &hx->bch.Flags); 1154 hscx_xpr(hx); 1155 return; 1156 } 1157 pr_debug("%s: B%1d XDU error at len %d\n", hx->ip->name, 1158 hx->bch.nr, hx->bch.tx_idx); 1159 hx->bch.tx_idx = 0; 1160 hscx_cmdr(hx, 0x01); /* XRES */ 1161 } 1162 } 1163 1164 irqreturn_t 1165 mISDNipac_irq(struct ipac_hw *ipac, int maxloop) 1166 { 1167 int cnt = maxloop + 1; 1168 u8 ista, istad; 1169 struct isac_hw *isac = &ipac->isac; 1170 1171 if (ipac->type & IPAC_TYPE_IPACX) { 1172 ista = ReadIPAC(ipac, ISACX_ISTA); 1173 while (ista && cnt--) { 1174 pr_debug("%s: ISTA %02x\n", ipac->name, ista); 1175 if (ista & IPACX__ICA) 1176 ipac_irq(&ipac->hscx[0], ista); 1177 if (ista & IPACX__ICB) 1178 ipac_irq(&ipac->hscx[1], ista); 1179 if (ista & (ISACX__ICD | ISACX__CIC)) 1180 mISDNisac_irq(&ipac->isac, ista); 1181 ista = ReadIPAC(ipac, ISACX_ISTA); 1182 } 1183 } else if (ipac->type & IPAC_TYPE_IPAC) { 1184 ista = ReadIPAC(ipac, IPAC_ISTA); 1185 while (ista && cnt--) { 1186 pr_debug("%s: ISTA %02x\n", ipac->name, ista); 1187 if (ista & (IPAC__ICD | IPAC__EXD)) { 1188 istad = ReadISAC(isac, ISAC_ISTA); 1189 pr_debug("%s: ISTAD %02x\n", ipac->name, istad); 1190 if (istad & IPAC_D_TIN2) 1191 pr_debug("%s TIN2 irq\n", ipac->name); 1192 if (ista & IPAC__EXD) 1193 istad |= 1; /* ISAC EXI */ 1194 mISDNisac_irq(isac, istad); 1195 } 1196 if (ista & (IPAC__ICA | IPAC__EXA)) 1197 ipac_irq(&ipac->hscx[0], ista); 1198 if (ista & (IPAC__ICB | IPAC__EXB)) 1199 ipac_irq(&ipac->hscx[1], ista); 1200 ista = ReadIPAC(ipac, IPAC_ISTA); 1201 } 1202 } else if (ipac->type & IPAC_TYPE_HSCX) { 1203 while (cnt) { 1204 ista = ReadIPAC(ipac, IPAC_ISTAB + ipac->hscx[1].off); 1205 pr_debug("%s: B2 ISTA %02x\n", ipac->name, ista); 1206 if (ista) 1207 ipac_irq(&ipac->hscx[1], ista); 1208 istad = ReadISAC(isac, ISAC_ISTA); 1209 pr_debug("%s: ISTAD %02x\n", ipac->name, istad); 1210 if (istad) 1211 mISDNisac_irq(isac, istad); 1212 if (0 == (ista | istad)) 1213 break; 1214 cnt--; 1215 } 1216 } 1217 if (cnt > maxloop) /* only for ISAC/HSCX without PCI IRQ test */ 1218 return IRQ_NONE; 1219 if (cnt < maxloop) 1220 pr_debug("%s: %d irqloops cpu%d\n", ipac->name, 1221 maxloop - cnt, smp_processor_id()); 1222 if (maxloop && !cnt) 1223 pr_notice("%s: %d IRQ LOOP cpu%d\n", ipac->name, 1224 maxloop, smp_processor_id()); 1225 return IRQ_HANDLED; 1226 } 1227 EXPORT_SYMBOL(mISDNipac_irq); 1228 1229 static int 1230 hscx_mode(struct hscx_hw *hscx, u32 bprotocol) 1231 { 1232 pr_debug("%s: HSCX %c protocol %x-->%x ch %d\n", hscx->ip->name, 1233 '@' + hscx->bch.nr, hscx->bch.state, bprotocol, hscx->bch.nr); 1234 if (hscx->ip->type & IPAC_TYPE_IPACX) { 1235 if (hscx->bch.nr & 1) { /* B1 and ICA */ 1236 WriteIPAC(hscx->ip, ISACX_BCHA_TSDP_BC1, 0x80); 1237 WriteIPAC(hscx->ip, ISACX_BCHA_CR, 0x88); 1238 } else { /* B2 and ICB */ 1239 WriteIPAC(hscx->ip, ISACX_BCHB_TSDP_BC1, 0x81); 1240 WriteIPAC(hscx->ip, ISACX_BCHB_CR, 0x88); 1241 } 1242 switch (bprotocol) { 1243 case ISDN_P_NONE: /* init */ 1244 WriteHSCX(hscx, IPACX_MODEB, 0xC0); /* rec off */ 1245 WriteHSCX(hscx, IPACX_EXMB, 0x30); /* std adj. */ 1246 WriteHSCX(hscx, IPACX_MASKB, 0xFF); /* ints off */ 1247 hscx_cmdr(hscx, 0x41); 1248 test_and_clear_bit(FLG_HDLC, &hscx->bch.Flags); 1249 test_and_clear_bit(FLG_TRANSPARENT, &hscx->bch.Flags); 1250 break; 1251 case ISDN_P_B_RAW: 1252 WriteHSCX(hscx, IPACX_MODEB, 0x88); /* ex trans */ 1253 WriteHSCX(hscx, IPACX_EXMB, 0x00); /* trans */ 1254 hscx_cmdr(hscx, 0x41); 1255 WriteHSCX(hscx, IPACX_MASKB, IPACX_B_ON); 1256 test_and_set_bit(FLG_TRANSPARENT, &hscx->bch.Flags); 1257 break; 1258 case ISDN_P_B_HDLC: 1259 WriteHSCX(hscx, IPACX_MODEB, 0xC0); /* trans */ 1260 WriteHSCX(hscx, IPACX_EXMB, 0x00); /* hdlc,crc */ 1261 hscx_cmdr(hscx, 0x41); 1262 WriteHSCX(hscx, IPACX_MASKB, IPACX_B_ON); 1263 test_and_set_bit(FLG_HDLC, &hscx->bch.Flags); 1264 break; 1265 default: 1266 pr_info("%s: protocol not known %x\n", hscx->ip->name, 1267 bprotocol); 1268 return -ENOPROTOOPT; 1269 } 1270 } else if (hscx->ip->type & IPAC_TYPE_IPAC) { /* IPAC */ 1271 WriteHSCX(hscx, IPAC_CCR1, 0x82); 1272 WriteHSCX(hscx, IPAC_CCR2, 0x30); 1273 WriteHSCX(hscx, IPAC_XCCR, 0x07); 1274 WriteHSCX(hscx, IPAC_RCCR, 0x07); 1275 WriteHSCX(hscx, IPAC_TSAX, hscx->slot); 1276 WriteHSCX(hscx, IPAC_TSAR, hscx->slot); 1277 switch (bprotocol) { 1278 case ISDN_P_NONE: 1279 WriteHSCX(hscx, IPAC_TSAX, 0x1F); 1280 WriteHSCX(hscx, IPAC_TSAR, 0x1F); 1281 WriteHSCX(hscx, IPAC_MODEB, 0x84); 1282 WriteHSCX(hscx, IPAC_CCR1, 0x82); 1283 WriteHSCX(hscx, IPAC_MASKB, 0xFF); /* ints off */ 1284 test_and_clear_bit(FLG_HDLC, &hscx->bch.Flags); 1285 test_and_clear_bit(FLG_TRANSPARENT, &hscx->bch.Flags); 1286 break; 1287 case ISDN_P_B_RAW: 1288 WriteHSCX(hscx, IPAC_MODEB, 0xe4); /* ex trans */ 1289 WriteHSCX(hscx, IPAC_CCR1, 0x82); 1290 hscx_cmdr(hscx, 0x41); 1291 WriteHSCX(hscx, IPAC_MASKB, 0); 1292 test_and_set_bit(FLG_TRANSPARENT, &hscx->bch.Flags); 1293 break; 1294 case ISDN_P_B_HDLC: 1295 WriteHSCX(hscx, IPAC_MODEB, 0x8c); 1296 WriteHSCX(hscx, IPAC_CCR1, 0x8a); 1297 hscx_cmdr(hscx, 0x41); 1298 WriteHSCX(hscx, IPAC_MASKB, 0); 1299 test_and_set_bit(FLG_HDLC, &hscx->bch.Flags); 1300 break; 1301 default: 1302 pr_info("%s: protocol not known %x\n", hscx->ip->name, 1303 bprotocol); 1304 return -ENOPROTOOPT; 1305 } 1306 } else if (hscx->ip->type & IPAC_TYPE_HSCX) { /* HSCX */ 1307 WriteHSCX(hscx, IPAC_CCR1, 0x85); 1308 WriteHSCX(hscx, IPAC_CCR2, 0x30); 1309 WriteHSCX(hscx, IPAC_XCCR, 0x07); 1310 WriteHSCX(hscx, IPAC_RCCR, 0x07); 1311 WriteHSCX(hscx, IPAC_TSAX, hscx->slot); 1312 WriteHSCX(hscx, IPAC_TSAR, hscx->slot); 1313 switch (bprotocol) { 1314 case ISDN_P_NONE: 1315 WriteHSCX(hscx, IPAC_TSAX, 0x1F); 1316 WriteHSCX(hscx, IPAC_TSAR, 0x1F); 1317 WriteHSCX(hscx, IPAC_MODEB, 0x84); 1318 WriteHSCX(hscx, IPAC_CCR1, 0x85); 1319 WriteHSCX(hscx, IPAC_MASKB, 0xFF); /* ints off */ 1320 test_and_clear_bit(FLG_HDLC, &hscx->bch.Flags); 1321 test_and_clear_bit(FLG_TRANSPARENT, &hscx->bch.Flags); 1322 break; 1323 case ISDN_P_B_RAW: 1324 WriteHSCX(hscx, IPAC_MODEB, 0xe4); /* ex trans */ 1325 WriteHSCX(hscx, IPAC_CCR1, 0x85); 1326 hscx_cmdr(hscx, 0x41); 1327 WriteHSCX(hscx, IPAC_MASKB, 0); 1328 test_and_set_bit(FLG_TRANSPARENT, &hscx->bch.Flags); 1329 break; 1330 case ISDN_P_B_HDLC: 1331 WriteHSCX(hscx, IPAC_MODEB, 0x8c); 1332 WriteHSCX(hscx, IPAC_CCR1, 0x8d); 1333 hscx_cmdr(hscx, 0x41); 1334 WriteHSCX(hscx, IPAC_MASKB, 0); 1335 test_and_set_bit(FLG_HDLC, &hscx->bch.Flags); 1336 break; 1337 default: 1338 pr_info("%s: protocol not known %x\n", hscx->ip->name, 1339 bprotocol); 1340 return -ENOPROTOOPT; 1341 } 1342 } else 1343 return -EINVAL; 1344 hscx->bch.state = bprotocol; 1345 return 0; 1346 } 1347 1348 static int 1349 hscx_l2l1(struct mISDNchannel *ch, struct sk_buff *skb) 1350 { 1351 struct bchannel *bch = container_of(ch, struct bchannel, ch); 1352 struct hscx_hw *hx = container_of(bch, struct hscx_hw, bch); 1353 int ret = -EINVAL; 1354 struct mISDNhead *hh = mISDN_HEAD_P(skb); 1355 unsigned long flags; 1356 1357 switch (hh->prim) { 1358 case PH_DATA_REQ: 1359 spin_lock_irqsave(hx->ip->hwlock, flags); 1360 ret = bchannel_senddata(bch, skb); 1361 if (ret > 0) { /* direct TX */ 1362 ret = 0; 1363 hscx_fill_fifo(hx); 1364 } 1365 spin_unlock_irqrestore(hx->ip->hwlock, flags); 1366 return ret; 1367 case PH_ACTIVATE_REQ: 1368 spin_lock_irqsave(hx->ip->hwlock, flags); 1369 if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags)) 1370 ret = hscx_mode(hx, ch->protocol); 1371 else 1372 ret = 0; 1373 spin_unlock_irqrestore(hx->ip->hwlock, flags); 1374 if (!ret) 1375 _queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY, 0, 1376 NULL, GFP_KERNEL); 1377 break; 1378 case PH_DEACTIVATE_REQ: 1379 spin_lock_irqsave(hx->ip->hwlock, flags); 1380 mISDN_clear_bchannel(bch); 1381 hscx_mode(hx, ISDN_P_NONE); 1382 spin_unlock_irqrestore(hx->ip->hwlock, flags); 1383 _queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, 1384 NULL, GFP_KERNEL); 1385 ret = 0; 1386 break; 1387 default: 1388 pr_info("%s: %s unknown prim(%x,%x)\n", 1389 hx->ip->name, __func__, hh->prim, hh->id); 1390 ret = -EINVAL; 1391 } 1392 if (!ret) 1393 dev_kfree_skb(skb); 1394 return ret; 1395 } 1396 1397 static int 1398 channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq) 1399 { 1400 return mISDN_ctrl_bchannel(bch, cq); 1401 } 1402 1403 static int 1404 hscx_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg) 1405 { 1406 struct bchannel *bch = container_of(ch, struct bchannel, ch); 1407 struct hscx_hw *hx = container_of(bch, struct hscx_hw, bch); 1408 int ret = -EINVAL; 1409 u_long flags; 1410 1411 pr_debug("%s: %s cmd:%x %p\n", hx->ip->name, __func__, cmd, arg); 1412 switch (cmd) { 1413 case CLOSE_CHANNEL: 1414 test_and_clear_bit(FLG_OPEN, &bch->Flags); 1415 cancel_work_sync(&bch->workq); 1416 spin_lock_irqsave(hx->ip->hwlock, flags); 1417 mISDN_clear_bchannel(bch); 1418 hscx_mode(hx, ISDN_P_NONE); 1419 spin_unlock_irqrestore(hx->ip->hwlock, flags); 1420 ch->protocol = ISDN_P_NONE; 1421 ch->peer = NULL; 1422 module_put(hx->ip->owner); 1423 ret = 0; 1424 break; 1425 case CONTROL_CHANNEL: 1426 ret = channel_bctrl(bch, arg); 1427 break; 1428 default: 1429 pr_info("%s: %s unknown prim(%x)\n", 1430 hx->ip->name, __func__, cmd); 1431 } 1432 return ret; 1433 } 1434 1435 static void 1436 free_ipac(struct ipac_hw *ipac) 1437 { 1438 isac_release(&ipac->isac); 1439 } 1440 1441 static const char *HSCXVer[] = 1442 {"A1", "?1", "A2", "?3", "A3", "V2.1", "?6", "?7", 1443 "?8", "?9", "?10", "?11", "?12", "?13", "?14", "???"}; 1444 1445 1446 1447 static void 1448 hscx_init(struct hscx_hw *hx) 1449 { 1450 u8 val; 1451 1452 WriteHSCX(hx, IPAC_RAH2, 0xFF); 1453 WriteHSCX(hx, IPAC_XBCH, 0x00); 1454 WriteHSCX(hx, IPAC_RLCR, 0x00); 1455 1456 if (hx->ip->type & IPAC_TYPE_HSCX) { 1457 WriteHSCX(hx, IPAC_CCR1, 0x85); 1458 val = ReadHSCX(hx, HSCX_VSTR); 1459 pr_debug("%s: HSCX VSTR %02x\n", hx->ip->name, val); 1460 if (hx->bch.debug & DEBUG_HW) 1461 pr_notice("%s: HSCX version %s\n", hx->ip->name, 1462 HSCXVer[val & 0x0f]); 1463 } else 1464 WriteHSCX(hx, IPAC_CCR1, 0x82); 1465 WriteHSCX(hx, IPAC_CCR2, 0x30); 1466 WriteHSCX(hx, IPAC_XCCR, 0x07); 1467 WriteHSCX(hx, IPAC_RCCR, 0x07); 1468 } 1469 1470 static int 1471 ipac_init(struct ipac_hw *ipac) 1472 { 1473 u8 val; 1474 1475 if (ipac->type & IPAC_TYPE_HSCX) { 1476 hscx_init(&ipac->hscx[0]); 1477 hscx_init(&ipac->hscx[1]); 1478 val = ReadIPAC(ipac, IPAC_ID); 1479 } else if (ipac->type & IPAC_TYPE_IPAC) { 1480 hscx_init(&ipac->hscx[0]); 1481 hscx_init(&ipac->hscx[1]); 1482 WriteIPAC(ipac, IPAC_MASK, IPAC__ON); 1483 val = ReadIPAC(ipac, IPAC_CONF); 1484 /* conf is default 0, but can be overwritten by card setup */ 1485 pr_debug("%s: IPAC CONF %02x/%02x\n", ipac->name, 1486 val, ipac->conf); 1487 WriteIPAC(ipac, IPAC_CONF, ipac->conf); 1488 val = ReadIPAC(ipac, IPAC_ID); 1489 if (ipac->hscx[0].bch.debug & DEBUG_HW) 1490 pr_notice("%s: IPAC Design ID %02x\n", ipac->name, val); 1491 } 1492 /* nothing special for IPACX to do here */ 1493 return isac_init(&ipac->isac); 1494 } 1495 1496 static int 1497 open_bchannel(struct ipac_hw *ipac, struct channel_req *rq) 1498 { 1499 struct bchannel *bch; 1500 1501 if (rq->adr.channel == 0 || rq->adr.channel > 2) 1502 return -EINVAL; 1503 if (rq->protocol == ISDN_P_NONE) 1504 return -EINVAL; 1505 bch = &ipac->hscx[rq->adr.channel - 1].bch; 1506 if (test_and_set_bit(FLG_OPEN, &bch->Flags)) 1507 return -EBUSY; /* b-channel can be only open once */ 1508 test_and_clear_bit(FLG_FILLEMPTY, &bch->Flags); 1509 bch->ch.protocol = rq->protocol; 1510 rq->ch = &bch->ch; 1511 return 0; 1512 } 1513 1514 static int 1515 channel_ctrl(struct ipac_hw *ipac, struct mISDN_ctrl_req *cq) 1516 { 1517 int ret = 0; 1518 1519 switch (cq->op) { 1520 case MISDN_CTRL_GETOP: 1521 cq->op = MISDN_CTRL_LOOP | MISDN_CTRL_L1_TIMER3; 1522 break; 1523 case MISDN_CTRL_LOOP: 1524 /* cq->channel: 0 disable, 1 B1 loop 2 B2 loop, 3 both */ 1525 if (cq->channel < 0 || cq->channel > 3) { 1526 ret = -EINVAL; 1527 break; 1528 } 1529 ret = ipac->ctrl(ipac, HW_TESTLOOP, cq->channel); 1530 break; 1531 case MISDN_CTRL_L1_TIMER3: 1532 ret = ipac->isac.ctrl(&ipac->isac, HW_TIMER3_VALUE, cq->p1); 1533 break; 1534 default: 1535 pr_info("%s: unknown CTRL OP %x\n", ipac->name, cq->op); 1536 ret = -EINVAL; 1537 break; 1538 } 1539 return ret; 1540 } 1541 1542 static int 1543 ipac_dctrl(struct mISDNchannel *ch, u32 cmd, void *arg) 1544 { 1545 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); 1546 struct dchannel *dch = container_of(dev, struct dchannel, dev); 1547 struct isac_hw *isac = container_of(dch, struct isac_hw, dch); 1548 struct ipac_hw *ipac = container_of(isac, struct ipac_hw, isac); 1549 struct channel_req *rq; 1550 int err = 0; 1551 1552 pr_debug("%s: DCTRL: %x %p\n", ipac->name, cmd, arg); 1553 switch (cmd) { 1554 case OPEN_CHANNEL: 1555 rq = arg; 1556 if (rq->protocol == ISDN_P_TE_S0) 1557 err = open_dchannel_caller(isac, rq, __builtin_return_address(0)); 1558 else 1559 err = open_bchannel(ipac, rq); 1560 if (err) 1561 break; 1562 if (!try_module_get(ipac->owner)) 1563 pr_info("%s: cannot get module\n", ipac->name); 1564 break; 1565 case CLOSE_CHANNEL: 1566 pr_debug("%s: dev(%d) close from %p\n", ipac->name, 1567 dch->dev.id, __builtin_return_address(0)); 1568 module_put(ipac->owner); 1569 break; 1570 case CONTROL_CHANNEL: 1571 err = channel_ctrl(ipac, arg); 1572 break; 1573 default: 1574 pr_debug("%s: unknown DCTRL command %x\n", ipac->name, cmd); 1575 return -EINVAL; 1576 } 1577 return err; 1578 } 1579 1580 u32 1581 mISDNipac_init(struct ipac_hw *ipac, void *hw) 1582 { 1583 u32 ret; 1584 u8 i; 1585 1586 ipac->hw = hw; 1587 if (ipac->isac.dch.debug & DEBUG_HW) 1588 pr_notice("%s: ipac type %x\n", ipac->name, ipac->type); 1589 if (ipac->type & IPAC_TYPE_HSCX) { 1590 ipac->isac.type = IPAC_TYPE_ISAC; 1591 ipac->hscx[0].off = 0; 1592 ipac->hscx[1].off = 0x40; 1593 ipac->hscx[0].fifo_size = 32; 1594 ipac->hscx[1].fifo_size = 32; 1595 } else if (ipac->type & IPAC_TYPE_IPAC) { 1596 ipac->isac.type = IPAC_TYPE_IPAC | IPAC_TYPE_ISAC; 1597 ipac->hscx[0].off = 0; 1598 ipac->hscx[1].off = 0x40; 1599 ipac->hscx[0].fifo_size = 64; 1600 ipac->hscx[1].fifo_size = 64; 1601 } else if (ipac->type & IPAC_TYPE_IPACX) { 1602 ipac->isac.type = IPAC_TYPE_IPACX | IPAC_TYPE_ISACX; 1603 ipac->hscx[0].off = IPACX_OFF_ICA; 1604 ipac->hscx[1].off = IPACX_OFF_ICB; 1605 ipac->hscx[0].fifo_size = 64; 1606 ipac->hscx[1].fifo_size = 64; 1607 } else 1608 return 0; 1609 1610 mISDNisac_init(&ipac->isac, hw); 1611 1612 ipac->isac.dch.dev.D.ctrl = ipac_dctrl; 1613 1614 for (i = 0; i < 2; i++) { 1615 ipac->hscx[i].bch.nr = i + 1; 1616 set_channelmap(i + 1, ipac->isac.dch.dev.channelmap); 1617 list_add(&ipac->hscx[i].bch.ch.list, 1618 &ipac->isac.dch.dev.bchannels); 1619 mISDN_initbchannel(&ipac->hscx[i].bch, MAX_DATA_MEM, 1620 ipac->hscx[i].fifo_size); 1621 ipac->hscx[i].bch.ch.nr = i + 1; 1622 ipac->hscx[i].bch.ch.send = &hscx_l2l1; 1623 ipac->hscx[i].bch.ch.ctrl = hscx_bctrl; 1624 ipac->hscx[i].bch.hw = hw; 1625 ipac->hscx[i].ip = ipac; 1626 /* default values for IOM time slots 1627 * can be overwriten by card */ 1628 ipac->hscx[i].slot = (i == 0) ? 0x2f : 0x03; 1629 } 1630 1631 ipac->init = ipac_init; 1632 ipac->release = free_ipac; 1633 1634 ret = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) | 1635 (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK)); 1636 return ret; 1637 } 1638 EXPORT_SYMBOL(mISDNipac_init); 1639 1640 static int __init 1641 isac_mod_init(void) 1642 { 1643 pr_notice("mISDNipac module version %s\n", ISAC_REV); 1644 return 0; 1645 } 1646 1647 static void __exit 1648 isac_mod_cleanup(void) 1649 { 1650 pr_notice("mISDNipac module unloaded\n"); 1651 } 1652 module_init(isac_mod_init); 1653 module_exit(isac_mod_cleanup); 1654