1 /* 2 * avm_fritz.c low level stuff for AVM FRITZ!CARD PCI ISDN cards 3 * Thanks to AVM, Berlin for informations 4 * 5 * Author Karsten Keil <keil@isdn4linux.de> 6 * 7 * Copyright 2009 by Karsten Keil <keil@isdn4linux.de> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * 22 */ 23 #include <linux/interrupt.h> 24 #include <linux/module.h> 25 #include <linux/pci.h> 26 #include <linux/delay.h> 27 #include <linux/mISDNhw.h> 28 #include <linux/slab.h> 29 #include <asm/unaligned.h> 30 #include "ipac.h" 31 32 33 #define AVMFRITZ_REV "2.3" 34 35 static int AVM_cnt; 36 static int debug; 37 38 enum { 39 AVM_FRITZ_PCI, 40 AVM_FRITZ_PCIV2, 41 }; 42 43 #define HDLC_FIFO 0x0 44 #define HDLC_STATUS 0x4 45 #define CHIP_WINDOW 0x10 46 47 #define CHIP_INDEX 0x4 48 #define AVM_HDLC_1 0x00 49 #define AVM_HDLC_2 0x01 50 #define AVM_ISAC_FIFO 0x02 51 #define AVM_ISAC_REG_LOW 0x04 52 #define AVM_ISAC_REG_HIGH 0x06 53 54 #define AVM_STATUS0_IRQ_ISAC 0x01 55 #define AVM_STATUS0_IRQ_HDLC 0x02 56 #define AVM_STATUS0_IRQ_TIMER 0x04 57 #define AVM_STATUS0_IRQ_MASK 0x07 58 59 #define AVM_STATUS0_RESET 0x01 60 #define AVM_STATUS0_DIS_TIMER 0x02 61 #define AVM_STATUS0_RES_TIMER 0x04 62 #define AVM_STATUS0_ENA_IRQ 0x08 63 #define AVM_STATUS0_TESTBIT 0x10 64 65 #define AVM_STATUS1_INT_SEL 0x0f 66 #define AVM_STATUS1_ENA_IOM 0x80 67 68 #define HDLC_MODE_ITF_FLG 0x01 69 #define HDLC_MODE_TRANS 0x02 70 #define HDLC_MODE_CCR_7 0x04 71 #define HDLC_MODE_CCR_16 0x08 72 #define HDLC_FIFO_SIZE_128 0x20 73 #define HDLC_MODE_TESTLOOP 0x80 74 75 #define HDLC_INT_XPR 0x80 76 #define HDLC_INT_XDU 0x40 77 #define HDLC_INT_RPR 0x20 78 #define HDLC_INT_MASK 0xE0 79 80 #define HDLC_STAT_RME 0x01 81 #define HDLC_STAT_RDO 0x10 82 #define HDLC_STAT_CRCVFRRAB 0x0E 83 #define HDLC_STAT_CRCVFR 0x06 84 #define HDLC_STAT_RML_MASK_V1 0x3f00 85 #define HDLC_STAT_RML_MASK_V2 0x7f00 86 87 #define HDLC_CMD_XRS 0x80 88 #define HDLC_CMD_XME 0x01 89 #define HDLC_CMD_RRS 0x20 90 #define HDLC_CMD_XML_MASK 0x3f00 91 92 #define HDLC_FIFO_SIZE_V1 32 93 #define HDLC_FIFO_SIZE_V2 128 94 95 /* Fritz PCI v2.0 */ 96 97 #define AVM_HDLC_FIFO_1 0x10 98 #define AVM_HDLC_FIFO_2 0x18 99 100 #define AVM_HDLC_STATUS_1 0x14 101 #define AVM_HDLC_STATUS_2 0x1c 102 103 #define AVM_ISACX_INDEX 0x04 104 #define AVM_ISACX_DATA 0x08 105 106 /* data struct */ 107 #define LOG_SIZE 63 108 109 struct hdlc_stat_reg { 110 #ifdef __BIG_ENDIAN 111 u8 fill; 112 u8 mode; 113 u8 xml; 114 u8 cmd; 115 #else 116 u8 cmd; 117 u8 xml; 118 u8 mode; 119 u8 fill; 120 #endif 121 } __attribute__((packed)); 122 123 struct hdlc_hw { 124 union { 125 u32 ctrl; 126 struct hdlc_stat_reg sr; 127 } ctrl; 128 u32 stat; 129 }; 130 131 struct fritzcard { 132 struct list_head list; 133 struct pci_dev *pdev; 134 char name[MISDN_MAX_IDLEN]; 135 u8 type; 136 u8 ctrlreg; 137 u16 irq; 138 u32 irqcnt; 139 u32 addr; 140 spinlock_t lock; /* hw lock */ 141 struct isac_hw isac; 142 struct hdlc_hw hdlc[2]; 143 struct bchannel bch[2]; 144 char log[LOG_SIZE + 1]; 145 }; 146 147 static LIST_HEAD(Cards); 148 static DEFINE_RWLOCK(card_lock); /* protect Cards */ 149 150 static void 151 _set_debug(struct fritzcard *card) 152 { 153 card->isac.dch.debug = debug; 154 card->bch[0].debug = debug; 155 card->bch[1].debug = debug; 156 } 157 158 static int 159 set_debug(const char *val, const struct kernel_param *kp) 160 { 161 int ret; 162 struct fritzcard *card; 163 164 ret = param_set_uint(val, kp); 165 if (!ret) { 166 read_lock(&card_lock); 167 list_for_each_entry(card, &Cards, list) 168 _set_debug(card); 169 read_unlock(&card_lock); 170 } 171 return ret; 172 } 173 174 MODULE_AUTHOR("Karsten Keil"); 175 MODULE_LICENSE("GPL v2"); 176 MODULE_VERSION(AVMFRITZ_REV); 177 module_param_call(debug, set_debug, param_get_uint, &debug, S_IRUGO | S_IWUSR); 178 MODULE_PARM_DESC(debug, "avmfritz debug mask"); 179 180 /* Interface functions */ 181 182 static u8 183 ReadISAC_V1(void *p, u8 offset) 184 { 185 struct fritzcard *fc = p; 186 u8 idx = (offset > 0x2f) ? AVM_ISAC_REG_HIGH : AVM_ISAC_REG_LOW; 187 188 outb(idx, fc->addr + CHIP_INDEX); 189 return inb(fc->addr + CHIP_WINDOW + (offset & 0xf)); 190 } 191 192 static void 193 WriteISAC_V1(void *p, u8 offset, u8 value) 194 { 195 struct fritzcard *fc = p; 196 u8 idx = (offset > 0x2f) ? AVM_ISAC_REG_HIGH : AVM_ISAC_REG_LOW; 197 198 outb(idx, fc->addr + CHIP_INDEX); 199 outb(value, fc->addr + CHIP_WINDOW + (offset & 0xf)); 200 } 201 202 static void 203 ReadFiFoISAC_V1(void *p, u8 off, u8 *data, int size) 204 { 205 struct fritzcard *fc = p; 206 207 outb(AVM_ISAC_FIFO, fc->addr + CHIP_INDEX); 208 insb(fc->addr + CHIP_WINDOW, data, size); 209 } 210 211 static void 212 WriteFiFoISAC_V1(void *p, u8 off, u8 *data, int size) 213 { 214 struct fritzcard *fc = p; 215 216 outb(AVM_ISAC_FIFO, fc->addr + CHIP_INDEX); 217 outsb(fc->addr + CHIP_WINDOW, data, size); 218 } 219 220 static u8 221 ReadISAC_V2(void *p, u8 offset) 222 { 223 struct fritzcard *fc = p; 224 225 outl(offset, fc->addr + AVM_ISACX_INDEX); 226 return 0xff & inl(fc->addr + AVM_ISACX_DATA); 227 } 228 229 static void 230 WriteISAC_V2(void *p, u8 offset, u8 value) 231 { 232 struct fritzcard *fc = p; 233 234 outl(offset, fc->addr + AVM_ISACX_INDEX); 235 outl(value, fc->addr + AVM_ISACX_DATA); 236 } 237 238 static void 239 ReadFiFoISAC_V2(void *p, u8 off, u8 *data, int size) 240 { 241 struct fritzcard *fc = p; 242 int i; 243 244 outl(off, fc->addr + AVM_ISACX_INDEX); 245 for (i = 0; i < size; i++) 246 data[i] = 0xff & inl(fc->addr + AVM_ISACX_DATA); 247 } 248 249 static void 250 WriteFiFoISAC_V2(void *p, u8 off, u8 *data, int size) 251 { 252 struct fritzcard *fc = p; 253 int i; 254 255 outl(off, fc->addr + AVM_ISACX_INDEX); 256 for (i = 0; i < size; i++) 257 outl(data[i], fc->addr + AVM_ISACX_DATA); 258 } 259 260 static struct bchannel * 261 Sel_BCS(struct fritzcard *fc, u32 channel) 262 { 263 if (test_bit(FLG_ACTIVE, &fc->bch[0].Flags) && 264 (fc->bch[0].nr & channel)) 265 return &fc->bch[0]; 266 else if (test_bit(FLG_ACTIVE, &fc->bch[1].Flags) && 267 (fc->bch[1].nr & channel)) 268 return &fc->bch[1]; 269 else 270 return NULL; 271 } 272 273 static inline void 274 __write_ctrl_pci(struct fritzcard *fc, struct hdlc_hw *hdlc, u32 channel) { 275 u32 idx = channel == 2 ? AVM_HDLC_2 : AVM_HDLC_1; 276 277 outl(idx, fc->addr + CHIP_INDEX); 278 outl(hdlc->ctrl.ctrl, fc->addr + CHIP_WINDOW + HDLC_STATUS); 279 } 280 281 static inline void 282 __write_ctrl_pciv2(struct fritzcard *fc, struct hdlc_hw *hdlc, u32 channel) { 283 outl(hdlc->ctrl.ctrl, fc->addr + (channel == 2 ? AVM_HDLC_STATUS_2 : 284 AVM_HDLC_STATUS_1)); 285 } 286 287 static void 288 write_ctrl(struct bchannel *bch, int which) { 289 struct fritzcard *fc = bch->hw; 290 struct hdlc_hw *hdlc; 291 292 hdlc = &fc->hdlc[(bch->nr - 1) & 1]; 293 pr_debug("%s: hdlc %c wr%x ctrl %x\n", fc->name, '@' + bch->nr, 294 which, hdlc->ctrl.ctrl); 295 switch (fc->type) { 296 case AVM_FRITZ_PCIV2: 297 __write_ctrl_pciv2(fc, hdlc, bch->nr); 298 break; 299 case AVM_FRITZ_PCI: 300 __write_ctrl_pci(fc, hdlc, bch->nr); 301 break; 302 } 303 } 304 305 306 static inline u32 307 __read_status_pci(u_long addr, u32 channel) 308 { 309 outl(channel == 2 ? AVM_HDLC_2 : AVM_HDLC_1, addr + CHIP_INDEX); 310 return inl(addr + CHIP_WINDOW + HDLC_STATUS); 311 } 312 313 static inline u32 314 __read_status_pciv2(u_long addr, u32 channel) 315 { 316 return inl(addr + (channel == 2 ? AVM_HDLC_STATUS_2 : 317 AVM_HDLC_STATUS_1)); 318 } 319 320 321 static u32 322 read_status(struct fritzcard *fc, u32 channel) 323 { 324 switch (fc->type) { 325 case AVM_FRITZ_PCIV2: 326 return __read_status_pciv2(fc->addr, channel); 327 case AVM_FRITZ_PCI: 328 return __read_status_pci(fc->addr, channel); 329 } 330 /* dummy */ 331 return 0; 332 } 333 334 static void 335 enable_hwirq(struct fritzcard *fc) 336 { 337 fc->ctrlreg |= AVM_STATUS0_ENA_IRQ; 338 outb(fc->ctrlreg, fc->addr + 2); 339 } 340 341 static void 342 disable_hwirq(struct fritzcard *fc) 343 { 344 fc->ctrlreg &= ~AVM_STATUS0_ENA_IRQ; 345 outb(fc->ctrlreg, fc->addr + 2); 346 } 347 348 static int 349 modehdlc(struct bchannel *bch, int protocol) 350 { 351 struct fritzcard *fc = bch->hw; 352 struct hdlc_hw *hdlc; 353 u8 mode; 354 355 hdlc = &fc->hdlc[(bch->nr - 1) & 1]; 356 pr_debug("%s: hdlc %c protocol %x-->%x ch %d\n", fc->name, 357 '@' + bch->nr, bch->state, protocol, bch->nr); 358 hdlc->ctrl.ctrl = 0; 359 mode = (fc->type == AVM_FRITZ_PCIV2) ? HDLC_FIFO_SIZE_128 : 0; 360 361 switch (protocol) { 362 case -1: /* used for init */ 363 bch->state = -1; 364 case ISDN_P_NONE: 365 if (bch->state == ISDN_P_NONE) 366 break; 367 hdlc->ctrl.sr.cmd = HDLC_CMD_XRS | HDLC_CMD_RRS; 368 hdlc->ctrl.sr.mode = mode | HDLC_MODE_TRANS; 369 write_ctrl(bch, 5); 370 bch->state = ISDN_P_NONE; 371 test_and_clear_bit(FLG_HDLC, &bch->Flags); 372 test_and_clear_bit(FLG_TRANSPARENT, &bch->Flags); 373 break; 374 case ISDN_P_B_RAW: 375 bch->state = protocol; 376 hdlc->ctrl.sr.cmd = HDLC_CMD_XRS | HDLC_CMD_RRS; 377 hdlc->ctrl.sr.mode = mode | HDLC_MODE_TRANS; 378 write_ctrl(bch, 5); 379 hdlc->ctrl.sr.cmd = HDLC_CMD_XRS; 380 write_ctrl(bch, 1); 381 hdlc->ctrl.sr.cmd = 0; 382 test_and_set_bit(FLG_TRANSPARENT, &bch->Flags); 383 break; 384 case ISDN_P_B_HDLC: 385 bch->state = protocol; 386 hdlc->ctrl.sr.cmd = HDLC_CMD_XRS | HDLC_CMD_RRS; 387 hdlc->ctrl.sr.mode = mode | HDLC_MODE_ITF_FLG; 388 write_ctrl(bch, 5); 389 hdlc->ctrl.sr.cmd = HDLC_CMD_XRS; 390 write_ctrl(bch, 1); 391 hdlc->ctrl.sr.cmd = 0; 392 test_and_set_bit(FLG_HDLC, &bch->Flags); 393 break; 394 default: 395 pr_info("%s: protocol not known %x\n", fc->name, protocol); 396 return -ENOPROTOOPT; 397 } 398 return 0; 399 } 400 401 static void 402 hdlc_empty_fifo(struct bchannel *bch, int count) 403 { 404 u32 *ptr; 405 u8 *p; 406 u32 val, addr; 407 int cnt; 408 struct fritzcard *fc = bch->hw; 409 410 pr_debug("%s: %s %d\n", fc->name, __func__, count); 411 if (test_bit(FLG_RX_OFF, &bch->Flags)) { 412 p = NULL; 413 bch->dropcnt += count; 414 } else { 415 cnt = bchannel_get_rxbuf(bch, count); 416 if (cnt < 0) { 417 pr_warning("%s.B%d: No bufferspace for %d bytes\n", 418 fc->name, bch->nr, count); 419 return; 420 } 421 p = skb_put(bch->rx_skb, count); 422 } 423 ptr = (u32 *)p; 424 if (fc->type == AVM_FRITZ_PCIV2) 425 addr = fc->addr + (bch->nr == 2 ? 426 AVM_HDLC_FIFO_2 : AVM_HDLC_FIFO_1); 427 else { 428 addr = fc->addr + CHIP_WINDOW; 429 outl(bch->nr == 2 ? AVM_HDLC_2 : AVM_HDLC_1, fc->addr); 430 } 431 cnt = 0; 432 while (cnt < count) { 433 val = le32_to_cpu(inl(addr)); 434 if (p) { 435 put_unaligned(val, ptr); 436 ptr++; 437 } 438 cnt += 4; 439 } 440 if (p && (debug & DEBUG_HW_BFIFO)) { 441 snprintf(fc->log, LOG_SIZE, "B%1d-recv %s %d ", 442 bch->nr, fc->name, count); 443 print_hex_dump_bytes(fc->log, DUMP_PREFIX_OFFSET, p, count); 444 } 445 } 446 447 static void 448 hdlc_fill_fifo(struct bchannel *bch) 449 { 450 struct fritzcard *fc = bch->hw; 451 struct hdlc_hw *hdlc; 452 int count, fs, cnt = 0, idx; 453 bool fillempty = false; 454 u8 *p; 455 u32 *ptr, val, addr; 456 457 idx = (bch->nr - 1) & 1; 458 hdlc = &fc->hdlc[idx]; 459 fs = (fc->type == AVM_FRITZ_PCIV2) ? 460 HDLC_FIFO_SIZE_V2 : HDLC_FIFO_SIZE_V1; 461 if (!bch->tx_skb) { 462 if (!test_bit(FLG_TX_EMPTY, &bch->Flags)) 463 return; 464 count = fs; 465 p = bch->fill; 466 fillempty = true; 467 } else { 468 count = bch->tx_skb->len - bch->tx_idx; 469 if (count <= 0) 470 return; 471 p = bch->tx_skb->data + bch->tx_idx; 472 } 473 hdlc->ctrl.sr.cmd &= ~HDLC_CMD_XME; 474 if (count > fs) { 475 count = fs; 476 } else { 477 if (test_bit(FLG_HDLC, &bch->Flags)) 478 hdlc->ctrl.sr.cmd |= HDLC_CMD_XME; 479 } 480 ptr = (u32 *)p; 481 if (!fillempty) { 482 pr_debug("%s.B%d: %d/%d/%d", fc->name, bch->nr, count, 483 bch->tx_idx, bch->tx_skb->len); 484 bch->tx_idx += count; 485 } else { 486 pr_debug("%s.B%d: fillempty %d\n", fc->name, bch->nr, count); 487 } 488 hdlc->ctrl.sr.xml = ((count == fs) ? 0 : count); 489 if (fc->type == AVM_FRITZ_PCIV2) { 490 __write_ctrl_pciv2(fc, hdlc, bch->nr); 491 addr = fc->addr + (bch->nr == 2 ? 492 AVM_HDLC_FIFO_2 : AVM_HDLC_FIFO_1); 493 } else { 494 __write_ctrl_pci(fc, hdlc, bch->nr); 495 addr = fc->addr + CHIP_WINDOW; 496 } 497 if (fillempty) { 498 while (cnt < count) { 499 /* all bytes the same - no worry about endian */ 500 outl(*ptr, addr); 501 cnt += 4; 502 } 503 } else { 504 while (cnt < count) { 505 val = get_unaligned(ptr); 506 outl(cpu_to_le32(val), addr); 507 ptr++; 508 cnt += 4; 509 } 510 } 511 if ((debug & DEBUG_HW_BFIFO) && !fillempty) { 512 snprintf(fc->log, LOG_SIZE, "B%1d-send %s %d ", 513 bch->nr, fc->name, count); 514 print_hex_dump_bytes(fc->log, DUMP_PREFIX_OFFSET, p, count); 515 } 516 } 517 518 static void 519 HDLC_irq_xpr(struct bchannel *bch) 520 { 521 if (bch->tx_skb && bch->tx_idx < bch->tx_skb->len) { 522 hdlc_fill_fifo(bch); 523 } else { 524 if (bch->tx_skb) 525 dev_kfree_skb(bch->tx_skb); 526 if (get_next_bframe(bch)) { 527 hdlc_fill_fifo(bch); 528 test_and_clear_bit(FLG_TX_EMPTY, &bch->Flags); 529 } else if (test_bit(FLG_TX_EMPTY, &bch->Flags)) { 530 hdlc_fill_fifo(bch); 531 } 532 } 533 } 534 535 static void 536 HDLC_irq(struct bchannel *bch, u32 stat) 537 { 538 struct fritzcard *fc = bch->hw; 539 int len, fs; 540 u32 rmlMask; 541 struct hdlc_hw *hdlc; 542 543 hdlc = &fc->hdlc[(bch->nr - 1) & 1]; 544 pr_debug("%s: ch%d stat %#x\n", fc->name, bch->nr, stat); 545 if (fc->type == AVM_FRITZ_PCIV2) { 546 rmlMask = HDLC_STAT_RML_MASK_V2; 547 fs = HDLC_FIFO_SIZE_V2; 548 } else { 549 rmlMask = HDLC_STAT_RML_MASK_V1; 550 fs = HDLC_FIFO_SIZE_V1; 551 } 552 if (stat & HDLC_INT_RPR) { 553 if (stat & HDLC_STAT_RDO) { 554 pr_warning("%s: ch%d stat %x RDO\n", 555 fc->name, bch->nr, stat); 556 hdlc->ctrl.sr.xml = 0; 557 hdlc->ctrl.sr.cmd |= HDLC_CMD_RRS; 558 write_ctrl(bch, 1); 559 hdlc->ctrl.sr.cmd &= ~HDLC_CMD_RRS; 560 write_ctrl(bch, 1); 561 if (bch->rx_skb) 562 skb_trim(bch->rx_skb, 0); 563 } else { 564 len = (stat & rmlMask) >> 8; 565 if (!len) 566 len = fs; 567 hdlc_empty_fifo(bch, len); 568 if (!bch->rx_skb) 569 goto handle_tx; 570 if (test_bit(FLG_TRANSPARENT, &bch->Flags)) { 571 recv_Bchannel(bch, 0, false); 572 } else if (stat & HDLC_STAT_RME) { 573 if ((stat & HDLC_STAT_CRCVFRRAB) == 574 HDLC_STAT_CRCVFR) { 575 recv_Bchannel(bch, 0, false); 576 } else { 577 pr_warning("%s: got invalid frame\n", 578 fc->name); 579 skb_trim(bch->rx_skb, 0); 580 } 581 } 582 } 583 } 584 handle_tx: 585 if (stat & HDLC_INT_XDU) { 586 /* Here we lost an TX interrupt, so 587 * restart transmitting the whole frame on HDLC 588 * in transparent mode we send the next data 589 */ 590 pr_warning("%s: ch%d stat %x XDU %s\n", fc->name, bch->nr, 591 stat, bch->tx_skb ? "tx_skb" : "no tx_skb"); 592 if (bch->tx_skb && bch->tx_skb->len) { 593 if (!test_bit(FLG_TRANSPARENT, &bch->Flags)) 594 bch->tx_idx = 0; 595 } else if (test_bit(FLG_FILLEMPTY, &bch->Flags)) { 596 test_and_set_bit(FLG_TX_EMPTY, &bch->Flags); 597 } 598 hdlc->ctrl.sr.xml = 0; 599 hdlc->ctrl.sr.cmd |= HDLC_CMD_XRS; 600 write_ctrl(bch, 1); 601 hdlc->ctrl.sr.cmd &= ~HDLC_CMD_XRS; 602 HDLC_irq_xpr(bch); 603 return; 604 } else if (stat & HDLC_INT_XPR) 605 HDLC_irq_xpr(bch); 606 } 607 608 static inline void 609 HDLC_irq_main(struct fritzcard *fc) 610 { 611 u32 stat; 612 struct bchannel *bch; 613 614 stat = read_status(fc, 1); 615 if (stat & HDLC_INT_MASK) { 616 bch = Sel_BCS(fc, 1); 617 if (bch) 618 HDLC_irq(bch, stat); 619 else 620 pr_debug("%s: spurious ch1 IRQ\n", fc->name); 621 } 622 stat = read_status(fc, 2); 623 if (stat & HDLC_INT_MASK) { 624 bch = Sel_BCS(fc, 2); 625 if (bch) 626 HDLC_irq(bch, stat); 627 else 628 pr_debug("%s: spurious ch2 IRQ\n", fc->name); 629 } 630 } 631 632 static irqreturn_t 633 avm_fritz_interrupt(int intno, void *dev_id) 634 { 635 struct fritzcard *fc = dev_id; 636 u8 val; 637 u8 sval; 638 639 spin_lock(&fc->lock); 640 sval = inb(fc->addr + 2); 641 pr_debug("%s: irq stat0 %x\n", fc->name, sval); 642 if ((sval & AVM_STATUS0_IRQ_MASK) == AVM_STATUS0_IRQ_MASK) { 643 /* shared IRQ from other HW */ 644 spin_unlock(&fc->lock); 645 return IRQ_NONE; 646 } 647 fc->irqcnt++; 648 649 if (!(sval & AVM_STATUS0_IRQ_ISAC)) { 650 val = ReadISAC_V1(fc, ISAC_ISTA); 651 mISDNisac_irq(&fc->isac, val); 652 } 653 if (!(sval & AVM_STATUS0_IRQ_HDLC)) 654 HDLC_irq_main(fc); 655 spin_unlock(&fc->lock); 656 return IRQ_HANDLED; 657 } 658 659 static irqreturn_t 660 avm_fritzv2_interrupt(int intno, void *dev_id) 661 { 662 struct fritzcard *fc = dev_id; 663 u8 val; 664 u8 sval; 665 666 spin_lock(&fc->lock); 667 sval = inb(fc->addr + 2); 668 pr_debug("%s: irq stat0 %x\n", fc->name, sval); 669 if (!(sval & AVM_STATUS0_IRQ_MASK)) { 670 /* shared IRQ from other HW */ 671 spin_unlock(&fc->lock); 672 return IRQ_NONE; 673 } 674 fc->irqcnt++; 675 676 if (sval & AVM_STATUS0_IRQ_HDLC) 677 HDLC_irq_main(fc); 678 if (sval & AVM_STATUS0_IRQ_ISAC) { 679 val = ReadISAC_V2(fc, ISACX_ISTA); 680 mISDNisac_irq(&fc->isac, val); 681 } 682 if (sval & AVM_STATUS0_IRQ_TIMER) { 683 pr_debug("%s: timer irq\n", fc->name); 684 outb(fc->ctrlreg | AVM_STATUS0_RES_TIMER, fc->addr + 2); 685 udelay(1); 686 outb(fc->ctrlreg, fc->addr + 2); 687 } 688 spin_unlock(&fc->lock); 689 return IRQ_HANDLED; 690 } 691 692 static int 693 avm_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb) 694 { 695 struct bchannel *bch = container_of(ch, struct bchannel, ch); 696 struct fritzcard *fc = bch->hw; 697 int ret = -EINVAL; 698 struct mISDNhead *hh = mISDN_HEAD_P(skb); 699 unsigned long flags; 700 701 switch (hh->prim) { 702 case PH_DATA_REQ: 703 spin_lock_irqsave(&fc->lock, flags); 704 ret = bchannel_senddata(bch, skb); 705 if (ret > 0) { /* direct TX */ 706 hdlc_fill_fifo(bch); 707 ret = 0; 708 } 709 spin_unlock_irqrestore(&fc->lock, flags); 710 return ret; 711 case PH_ACTIVATE_REQ: 712 spin_lock_irqsave(&fc->lock, flags); 713 if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags)) 714 ret = modehdlc(bch, ch->protocol); 715 else 716 ret = 0; 717 spin_unlock_irqrestore(&fc->lock, flags); 718 if (!ret) 719 _queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY, 0, 720 NULL, GFP_KERNEL); 721 break; 722 case PH_DEACTIVATE_REQ: 723 spin_lock_irqsave(&fc->lock, flags); 724 mISDN_clear_bchannel(bch); 725 modehdlc(bch, ISDN_P_NONE); 726 spin_unlock_irqrestore(&fc->lock, flags); 727 _queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, 728 NULL, GFP_KERNEL); 729 ret = 0; 730 break; 731 } 732 if (!ret) 733 dev_kfree_skb(skb); 734 return ret; 735 } 736 737 static void 738 inithdlc(struct fritzcard *fc) 739 { 740 modehdlc(&fc->bch[0], -1); 741 modehdlc(&fc->bch[1], -1); 742 } 743 744 static void 745 clear_pending_hdlc_ints(struct fritzcard *fc) 746 { 747 u32 val; 748 749 val = read_status(fc, 1); 750 pr_debug("%s: HDLC 1 STA %x\n", fc->name, val); 751 val = read_status(fc, 2); 752 pr_debug("%s: HDLC 2 STA %x\n", fc->name, val); 753 } 754 755 static void 756 reset_avm(struct fritzcard *fc) 757 { 758 switch (fc->type) { 759 case AVM_FRITZ_PCI: 760 fc->ctrlreg = AVM_STATUS0_RESET | AVM_STATUS0_DIS_TIMER; 761 break; 762 case AVM_FRITZ_PCIV2: 763 fc->ctrlreg = AVM_STATUS0_RESET; 764 break; 765 } 766 if (debug & DEBUG_HW) 767 pr_notice("%s: reset\n", fc->name); 768 disable_hwirq(fc); 769 mdelay(5); 770 switch (fc->type) { 771 case AVM_FRITZ_PCI: 772 fc->ctrlreg = AVM_STATUS0_DIS_TIMER | AVM_STATUS0_RES_TIMER; 773 disable_hwirq(fc); 774 outb(AVM_STATUS1_ENA_IOM, fc->addr + 3); 775 break; 776 case AVM_FRITZ_PCIV2: 777 fc->ctrlreg = 0; 778 disable_hwirq(fc); 779 break; 780 } 781 mdelay(1); 782 if (debug & DEBUG_HW) 783 pr_notice("%s: S0/S1 %x/%x\n", fc->name, 784 inb(fc->addr + 2), inb(fc->addr + 3)); 785 } 786 787 static int 788 init_card(struct fritzcard *fc) 789 { 790 int ret, cnt = 3; 791 u_long flags; 792 793 reset_avm(fc); /* disable IRQ */ 794 if (fc->type == AVM_FRITZ_PCIV2) 795 ret = request_irq(fc->irq, avm_fritzv2_interrupt, 796 IRQF_SHARED, fc->name, fc); 797 else 798 ret = request_irq(fc->irq, avm_fritz_interrupt, 799 IRQF_SHARED, fc->name, fc); 800 if (ret) { 801 pr_info("%s: couldn't get interrupt %d\n", 802 fc->name, fc->irq); 803 return ret; 804 } 805 while (cnt--) { 806 spin_lock_irqsave(&fc->lock, flags); 807 ret = fc->isac.init(&fc->isac); 808 if (ret) { 809 spin_unlock_irqrestore(&fc->lock, flags); 810 pr_info("%s: ISAC init failed with %d\n", 811 fc->name, ret); 812 break; 813 } 814 clear_pending_hdlc_ints(fc); 815 inithdlc(fc); 816 enable_hwirq(fc); 817 /* RESET Receiver and Transmitter */ 818 if (fc->type == AVM_FRITZ_PCIV2) { 819 WriteISAC_V2(fc, ISACX_MASK, 0); 820 WriteISAC_V2(fc, ISACX_CMDRD, 0x41); 821 } else { 822 WriteISAC_V1(fc, ISAC_MASK, 0); 823 WriteISAC_V1(fc, ISAC_CMDR, 0x41); 824 } 825 spin_unlock_irqrestore(&fc->lock, flags); 826 /* Timeout 10ms */ 827 msleep_interruptible(10); 828 if (debug & DEBUG_HW) 829 pr_notice("%s: IRQ %d count %d\n", fc->name, 830 fc->irq, fc->irqcnt); 831 if (!fc->irqcnt) { 832 pr_info("%s: IRQ(%d) getting no IRQs during init %d\n", 833 fc->name, fc->irq, 3 - cnt); 834 reset_avm(fc); 835 } else 836 return 0; 837 } 838 free_irq(fc->irq, fc); 839 return -EIO; 840 } 841 842 static int 843 channel_bctrl(struct bchannel *bch, struct mISDN_ctrl_req *cq) 844 { 845 return mISDN_ctrl_bchannel(bch, cq); 846 } 847 848 static int 849 avm_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg) 850 { 851 struct bchannel *bch = container_of(ch, struct bchannel, ch); 852 struct fritzcard *fc = bch->hw; 853 int ret = -EINVAL; 854 u_long flags; 855 856 pr_debug("%s: %s cmd:%x %p\n", fc->name, __func__, cmd, arg); 857 switch (cmd) { 858 case CLOSE_CHANNEL: 859 test_and_clear_bit(FLG_OPEN, &bch->Flags); 860 cancel_work_sync(&bch->workq); 861 spin_lock_irqsave(&fc->lock, flags); 862 mISDN_clear_bchannel(bch); 863 modehdlc(bch, ISDN_P_NONE); 864 spin_unlock_irqrestore(&fc->lock, flags); 865 ch->protocol = ISDN_P_NONE; 866 ch->peer = NULL; 867 module_put(THIS_MODULE); 868 ret = 0; 869 break; 870 case CONTROL_CHANNEL: 871 ret = channel_bctrl(bch, arg); 872 break; 873 default: 874 pr_info("%s: %s unknown prim(%x)\n", fc->name, __func__, cmd); 875 } 876 return ret; 877 } 878 879 static int 880 channel_ctrl(struct fritzcard *fc, struct mISDN_ctrl_req *cq) 881 { 882 int ret = 0; 883 884 switch (cq->op) { 885 case MISDN_CTRL_GETOP: 886 cq->op = MISDN_CTRL_LOOP | MISDN_CTRL_L1_TIMER3; 887 break; 888 case MISDN_CTRL_LOOP: 889 /* cq->channel: 0 disable, 1 B1 loop 2 B2 loop, 3 both */ 890 if (cq->channel < 0 || cq->channel > 3) { 891 ret = -EINVAL; 892 break; 893 } 894 ret = fc->isac.ctrl(&fc->isac, HW_TESTLOOP, cq->channel); 895 break; 896 case MISDN_CTRL_L1_TIMER3: 897 ret = fc->isac.ctrl(&fc->isac, HW_TIMER3_VALUE, cq->p1); 898 break; 899 default: 900 pr_info("%s: %s unknown Op %x\n", fc->name, __func__, cq->op); 901 ret = -EINVAL; 902 break; 903 } 904 return ret; 905 } 906 907 static int 908 open_bchannel(struct fritzcard *fc, struct channel_req *rq) 909 { 910 struct bchannel *bch; 911 912 if (rq->adr.channel == 0 || rq->adr.channel > 2) 913 return -EINVAL; 914 if (rq->protocol == ISDN_P_NONE) 915 return -EINVAL; 916 bch = &fc->bch[rq->adr.channel - 1]; 917 if (test_and_set_bit(FLG_OPEN, &bch->Flags)) 918 return -EBUSY; /* b-channel can be only open once */ 919 bch->ch.protocol = rq->protocol; 920 rq->ch = &bch->ch; 921 return 0; 922 } 923 924 /* 925 * device control function 926 */ 927 static int 928 avm_dctrl(struct mISDNchannel *ch, u32 cmd, void *arg) 929 { 930 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); 931 struct dchannel *dch = container_of(dev, struct dchannel, dev); 932 struct fritzcard *fc = dch->hw; 933 struct channel_req *rq; 934 int err = 0; 935 936 pr_debug("%s: %s cmd:%x %p\n", fc->name, __func__, cmd, arg); 937 switch (cmd) { 938 case OPEN_CHANNEL: 939 rq = arg; 940 if (rq->protocol == ISDN_P_TE_S0) 941 err = fc->isac.open(&fc->isac, rq); 942 else 943 err = open_bchannel(fc, rq); 944 if (err) 945 break; 946 if (!try_module_get(THIS_MODULE)) 947 pr_info("%s: cannot get module\n", fc->name); 948 break; 949 case CLOSE_CHANNEL: 950 pr_debug("%s: dev(%d) close from %p\n", fc->name, dch->dev.id, 951 __builtin_return_address(0)); 952 module_put(THIS_MODULE); 953 break; 954 case CONTROL_CHANNEL: 955 err = channel_ctrl(fc, arg); 956 break; 957 default: 958 pr_debug("%s: %s unknown command %x\n", 959 fc->name, __func__, cmd); 960 return -EINVAL; 961 } 962 return err; 963 } 964 965 static int 966 setup_fritz(struct fritzcard *fc) 967 { 968 u32 val, ver; 969 970 if (!request_region(fc->addr, 32, fc->name)) { 971 pr_info("%s: AVM config port %x-%x already in use\n", 972 fc->name, fc->addr, fc->addr + 31); 973 return -EIO; 974 } 975 switch (fc->type) { 976 case AVM_FRITZ_PCI: 977 val = inl(fc->addr); 978 outl(AVM_HDLC_1, fc->addr + CHIP_INDEX); 979 ver = inl(fc->addr + CHIP_WINDOW + HDLC_STATUS) >> 24; 980 if (debug & DEBUG_HW) { 981 pr_notice("%s: PCI stat %#x\n", fc->name, val); 982 pr_notice("%s: PCI Class %X Rev %d\n", fc->name, 983 val & 0xff, (val >> 8) & 0xff); 984 pr_notice("%s: HDLC version %x\n", fc->name, ver & 0xf); 985 } 986 ASSIGN_FUNC(V1, ISAC, fc->isac); 987 fc->isac.type = IPAC_TYPE_ISAC; 988 break; 989 case AVM_FRITZ_PCIV2: 990 val = inl(fc->addr); 991 ver = inl(fc->addr + AVM_HDLC_STATUS_1) >> 24; 992 if (debug & DEBUG_HW) { 993 pr_notice("%s: PCI V2 stat %#x\n", fc->name, val); 994 pr_notice("%s: PCI V2 Class %X Rev %d\n", fc->name, 995 val & 0xff, (val >> 8) & 0xff); 996 pr_notice("%s: HDLC version %x\n", fc->name, ver & 0xf); 997 } 998 ASSIGN_FUNC(V2, ISAC, fc->isac); 999 fc->isac.type = IPAC_TYPE_ISACX; 1000 break; 1001 default: 1002 release_region(fc->addr, 32); 1003 pr_info("%s: AVM unknown type %d\n", fc->name, fc->type); 1004 return -ENODEV; 1005 } 1006 pr_notice("%s: %s config irq:%d base:0x%X\n", fc->name, 1007 (fc->type == AVM_FRITZ_PCI) ? "AVM Fritz!CARD PCI" : 1008 "AVM Fritz!CARD PCIv2", fc->irq, fc->addr); 1009 return 0; 1010 } 1011 1012 static void 1013 release_card(struct fritzcard *card) 1014 { 1015 u_long flags; 1016 1017 disable_hwirq(card); 1018 spin_lock_irqsave(&card->lock, flags); 1019 modehdlc(&card->bch[0], ISDN_P_NONE); 1020 modehdlc(&card->bch[1], ISDN_P_NONE); 1021 spin_unlock_irqrestore(&card->lock, flags); 1022 card->isac.release(&card->isac); 1023 free_irq(card->irq, card); 1024 mISDN_freebchannel(&card->bch[1]); 1025 mISDN_freebchannel(&card->bch[0]); 1026 mISDN_unregister_device(&card->isac.dch.dev); 1027 release_region(card->addr, 32); 1028 pci_disable_device(card->pdev); 1029 pci_set_drvdata(card->pdev, NULL); 1030 write_lock_irqsave(&card_lock, flags); 1031 list_del(&card->list); 1032 write_unlock_irqrestore(&card_lock, flags); 1033 kfree(card); 1034 AVM_cnt--; 1035 } 1036 1037 static int 1038 setup_instance(struct fritzcard *card) 1039 { 1040 int i, err; 1041 unsigned short minsize; 1042 u_long flags; 1043 1044 snprintf(card->name, MISDN_MAX_IDLEN - 1, "AVM.%d", AVM_cnt + 1); 1045 write_lock_irqsave(&card_lock, flags); 1046 list_add_tail(&card->list, &Cards); 1047 write_unlock_irqrestore(&card_lock, flags); 1048 1049 _set_debug(card); 1050 card->isac.name = card->name; 1051 spin_lock_init(&card->lock); 1052 card->isac.hwlock = &card->lock; 1053 mISDNisac_init(&card->isac, card); 1054 1055 card->isac.dch.dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) | 1056 (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK)); 1057 card->isac.dch.dev.D.ctrl = avm_dctrl; 1058 for (i = 0; i < 2; i++) { 1059 card->bch[i].nr = i + 1; 1060 set_channelmap(i + 1, card->isac.dch.dev.channelmap); 1061 if (AVM_FRITZ_PCIV2 == card->type) 1062 minsize = HDLC_FIFO_SIZE_V2; 1063 else 1064 minsize = HDLC_FIFO_SIZE_V1; 1065 mISDN_initbchannel(&card->bch[i], MAX_DATA_MEM, minsize); 1066 card->bch[i].hw = card; 1067 card->bch[i].ch.send = avm_l2l1B; 1068 card->bch[i].ch.ctrl = avm_bctrl; 1069 card->bch[i].ch.nr = i + 1; 1070 list_add(&card->bch[i].ch.list, &card->isac.dch.dev.bchannels); 1071 } 1072 err = setup_fritz(card); 1073 if (err) 1074 goto error; 1075 err = mISDN_register_device(&card->isac.dch.dev, &card->pdev->dev, 1076 card->name); 1077 if (err) 1078 goto error_reg; 1079 err = init_card(card); 1080 if (!err) { 1081 AVM_cnt++; 1082 pr_notice("AVM %d cards installed DEBUG\n", AVM_cnt); 1083 return 0; 1084 } 1085 mISDN_unregister_device(&card->isac.dch.dev); 1086 error_reg: 1087 release_region(card->addr, 32); 1088 error: 1089 card->isac.release(&card->isac); 1090 mISDN_freebchannel(&card->bch[1]); 1091 mISDN_freebchannel(&card->bch[0]); 1092 write_lock_irqsave(&card_lock, flags); 1093 list_del(&card->list); 1094 write_unlock_irqrestore(&card_lock, flags); 1095 kfree(card); 1096 return err; 1097 } 1098 1099 static int 1100 fritzpci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1101 { 1102 int err = -ENOMEM; 1103 struct fritzcard *card; 1104 1105 card = kzalloc(sizeof(struct fritzcard), GFP_KERNEL); 1106 if (!card) { 1107 pr_info("No kmem for fritzcard\n"); 1108 return err; 1109 } 1110 if (pdev->device == PCI_DEVICE_ID_AVM_A1_V2) 1111 card->type = AVM_FRITZ_PCIV2; 1112 else 1113 card->type = AVM_FRITZ_PCI; 1114 card->pdev = pdev; 1115 err = pci_enable_device(pdev); 1116 if (err) { 1117 kfree(card); 1118 return err; 1119 } 1120 1121 pr_notice("mISDN: found adapter %s at %s\n", 1122 (char *) ent->driver_data, pci_name(pdev)); 1123 1124 card->addr = pci_resource_start(pdev, 1); 1125 card->irq = pdev->irq; 1126 pci_set_drvdata(pdev, card); 1127 err = setup_instance(card); 1128 if (err) 1129 pci_set_drvdata(pdev, NULL); 1130 return err; 1131 } 1132 1133 static void 1134 fritz_remove_pci(struct pci_dev *pdev) 1135 { 1136 struct fritzcard *card = pci_get_drvdata(pdev); 1137 1138 if (card) 1139 release_card(card); 1140 else 1141 if (debug) 1142 pr_info("%s: drvdata already removed\n", __func__); 1143 } 1144 1145 static const struct pci_device_id fcpci_ids[] = { 1146 { PCI_VENDOR_ID_AVM, PCI_DEVICE_ID_AVM_A1, PCI_ANY_ID, PCI_ANY_ID, 1147 0, 0, (unsigned long) "Fritz!Card PCI"}, 1148 { PCI_VENDOR_ID_AVM, PCI_DEVICE_ID_AVM_A1_V2, PCI_ANY_ID, PCI_ANY_ID, 1149 0, 0, (unsigned long) "Fritz!Card PCI v2" }, 1150 { } 1151 }; 1152 MODULE_DEVICE_TABLE(pci, fcpci_ids); 1153 1154 static struct pci_driver fcpci_driver = { 1155 .name = "fcpci", 1156 .probe = fritzpci_probe, 1157 .remove = fritz_remove_pci, 1158 .id_table = fcpci_ids, 1159 }; 1160 1161 static int __init AVM_init(void) 1162 { 1163 int err; 1164 1165 pr_notice("AVM Fritz PCI driver Rev. %s\n", AVMFRITZ_REV); 1166 err = pci_register_driver(&fcpci_driver); 1167 return err; 1168 } 1169 1170 static void __exit AVM_cleanup(void) 1171 { 1172 pci_unregister_driver(&fcpci_driver); 1173 } 1174 1175 module_init(AVM_init); 1176 module_exit(AVM_cleanup); 1177