1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * NETJet mISDN driver 4 * 5 * Author Karsten Keil <keil@isdn4linux.de> 6 * 7 * Copyright 2009 by Karsten Keil <keil@isdn4linux.de> 8 */ 9 10 #include <linux/interrupt.h> 11 #include <linux/module.h> 12 #include <linux/pci.h> 13 #include <linux/delay.h> 14 #include <linux/mISDNhw.h> 15 #include <linux/slab.h> 16 #include "ipac.h" 17 #include "iohelper.h" 18 #include "netjet.h" 19 #include "isdnhdlc.h" 20 21 #define NETJET_REV "2.0" 22 23 enum nj_types { 24 NETJET_S_TJ300, 25 NETJET_S_TJ320, 26 ENTERNOW__TJ320, 27 }; 28 29 struct tiger_dma { 30 size_t size; 31 u32 *start; 32 int idx; 33 u32 dmastart; 34 u32 dmairq; 35 u32 dmaend; 36 u32 dmacur; 37 }; 38 39 struct tiger_hw; 40 41 struct tiger_ch { 42 struct bchannel bch; 43 struct tiger_hw *nj; 44 int idx; 45 int free; 46 int lastrx; 47 u16 rxstate; 48 u16 txstate; 49 struct isdnhdlc_vars hsend; 50 struct isdnhdlc_vars hrecv; 51 u8 *hsbuf; 52 u8 *hrbuf; 53 }; 54 55 #define TX_INIT 0x0001 56 #define TX_IDLE 0x0002 57 #define TX_RUN 0x0004 58 #define TX_UNDERRUN 0x0100 59 #define RX_OVERRUN 0x0100 60 61 #define LOG_SIZE 64 62 63 struct tiger_hw { 64 struct list_head list; 65 struct pci_dev *pdev; 66 char name[MISDN_MAX_IDLEN]; 67 enum nj_types typ; 68 int irq; 69 u32 irqcnt; 70 u32 base; 71 size_t base_s; 72 dma_addr_t dma; 73 void *dma_p; 74 spinlock_t lock; /* lock HW */ 75 struct isac_hw isac; 76 struct tiger_dma send; 77 struct tiger_dma recv; 78 struct tiger_ch bc[2]; 79 u8 ctrlreg; 80 u8 dmactrl; 81 u8 auxd; 82 u8 last_is0; 83 u8 irqmask0; 84 char log[LOG_SIZE]; 85 }; 86 87 static LIST_HEAD(Cards); 88 static DEFINE_RWLOCK(card_lock); /* protect Cards */ 89 static u32 debug; 90 static int nj_cnt; 91 92 static void 93 _set_debug(struct tiger_hw *card) 94 { 95 card->isac.dch.debug = debug; 96 card->bc[0].bch.debug = debug; 97 card->bc[1].bch.debug = debug; 98 } 99 100 static int 101 set_debug(const char *val, const struct kernel_param *kp) 102 { 103 int ret; 104 struct tiger_hw *card; 105 106 ret = param_set_uint(val, kp); 107 if (!ret) { 108 read_lock(&card_lock); 109 list_for_each_entry(card, &Cards, list) 110 _set_debug(card); 111 read_unlock(&card_lock); 112 } 113 return ret; 114 } 115 116 MODULE_AUTHOR("Karsten Keil"); 117 MODULE_LICENSE("GPL v2"); 118 MODULE_VERSION(NETJET_REV); 119 module_param_call(debug, set_debug, param_get_uint, &debug, S_IRUGO | S_IWUSR); 120 MODULE_PARM_DESC(debug, "Netjet debug mask"); 121 122 static void 123 nj_disable_hwirq(struct tiger_hw *card) 124 { 125 outb(0, card->base + NJ_IRQMASK0); 126 outb(0, card->base + NJ_IRQMASK1); 127 } 128 129 130 static u8 131 ReadISAC_nj(void *p, u8 offset) 132 { 133 struct tiger_hw *card = p; 134 u8 ret; 135 136 card->auxd &= 0xfc; 137 card->auxd |= (offset >> 4) & 3; 138 outb(card->auxd, card->base + NJ_AUXDATA); 139 ret = inb(card->base + NJ_ISAC_OFF + ((offset & 0x0f) << 2)); 140 return ret; 141 } 142 143 static void 144 WriteISAC_nj(void *p, u8 offset, u8 value) 145 { 146 struct tiger_hw *card = p; 147 148 card->auxd &= 0xfc; 149 card->auxd |= (offset >> 4) & 3; 150 outb(card->auxd, card->base + NJ_AUXDATA); 151 outb(value, card->base + NJ_ISAC_OFF + ((offset & 0x0f) << 2)); 152 } 153 154 static void 155 ReadFiFoISAC_nj(void *p, u8 offset, u8 *data, int size) 156 { 157 struct tiger_hw *card = p; 158 159 card->auxd &= 0xfc; 160 outb(card->auxd, card->base + NJ_AUXDATA); 161 insb(card->base + NJ_ISAC_OFF, data, size); 162 } 163 164 static void 165 WriteFiFoISAC_nj(void *p, u8 offset, u8 *data, int size) 166 { 167 struct tiger_hw *card = p; 168 169 card->auxd &= 0xfc; 170 outb(card->auxd, card->base + NJ_AUXDATA); 171 outsb(card->base + NJ_ISAC_OFF, data, size); 172 } 173 174 static void 175 fill_mem(struct tiger_ch *bc, u32 idx, u32 cnt, u32 fill) 176 { 177 struct tiger_hw *card = bc->bch.hw; 178 u32 mask = 0xff, val; 179 180 pr_debug("%s: B%1d fill %02x len %d idx %d/%d\n", card->name, 181 bc->bch.nr, fill, cnt, idx, card->send.idx); 182 if (bc->bch.nr & 2) { 183 fill <<= 8; 184 mask <<= 8; 185 } 186 mask ^= 0xffffffff; 187 while (cnt--) { 188 val = card->send.start[idx]; 189 val &= mask; 190 val |= fill; 191 card->send.start[idx++] = val; 192 if (idx >= card->send.size) 193 idx = 0; 194 } 195 } 196 197 static int 198 mode_tiger(struct tiger_ch *bc, u32 protocol) 199 { 200 struct tiger_hw *card = bc->bch.hw; 201 202 pr_debug("%s: B%1d protocol %x-->%x\n", card->name, 203 bc->bch.nr, bc->bch.state, protocol); 204 switch (protocol) { 205 case ISDN_P_NONE: 206 if (bc->bch.state == ISDN_P_NONE) 207 break; 208 fill_mem(bc, 0, card->send.size, 0xff); 209 bc->bch.state = protocol; 210 /* only stop dma and interrupts if both channels NULL */ 211 if ((card->bc[0].bch.state == ISDN_P_NONE) && 212 (card->bc[1].bch.state == ISDN_P_NONE)) { 213 card->dmactrl = 0; 214 outb(card->dmactrl, card->base + NJ_DMACTRL); 215 outb(0, card->base + NJ_IRQMASK0); 216 } 217 test_and_clear_bit(FLG_HDLC, &bc->bch.Flags); 218 test_and_clear_bit(FLG_TRANSPARENT, &bc->bch.Flags); 219 bc->txstate = 0; 220 bc->rxstate = 0; 221 bc->lastrx = -1; 222 break; 223 case ISDN_P_B_RAW: 224 test_and_set_bit(FLG_TRANSPARENT, &bc->bch.Flags); 225 bc->bch.state = protocol; 226 bc->idx = 0; 227 bc->free = card->send.size / 2; 228 bc->rxstate = 0; 229 bc->txstate = TX_INIT | TX_IDLE; 230 bc->lastrx = -1; 231 if (!card->dmactrl) { 232 card->dmactrl = 1; 233 outb(card->dmactrl, card->base + NJ_DMACTRL); 234 outb(0x0f, card->base + NJ_IRQMASK0); 235 } 236 break; 237 case ISDN_P_B_HDLC: 238 test_and_set_bit(FLG_HDLC, &bc->bch.Flags); 239 bc->bch.state = protocol; 240 bc->idx = 0; 241 bc->free = card->send.size / 2; 242 bc->rxstate = 0; 243 bc->txstate = TX_INIT | TX_IDLE; 244 isdnhdlc_rcv_init(&bc->hrecv, 0); 245 isdnhdlc_out_init(&bc->hsend, 0); 246 bc->lastrx = -1; 247 if (!card->dmactrl) { 248 card->dmactrl = 1; 249 outb(card->dmactrl, card->base + NJ_DMACTRL); 250 outb(0x0f, card->base + NJ_IRQMASK0); 251 } 252 break; 253 default: 254 pr_info("%s: %s protocol %x not handled\n", card->name, 255 __func__, protocol); 256 return -ENOPROTOOPT; 257 } 258 card->send.dmacur = inl(card->base + NJ_DMA_READ_ADR); 259 card->recv.dmacur = inl(card->base + NJ_DMA_WRITE_ADR); 260 card->send.idx = (card->send.dmacur - card->send.dmastart) >> 2; 261 card->recv.idx = (card->recv.dmacur - card->recv.dmastart) >> 2; 262 pr_debug("%s: %s ctrl %x irq %02x/%02x idx %d/%d\n", 263 card->name, __func__, 264 inb(card->base + NJ_DMACTRL), 265 inb(card->base + NJ_IRQMASK0), 266 inb(card->base + NJ_IRQSTAT0), 267 card->send.idx, 268 card->recv.idx); 269 return 0; 270 } 271 272 static void 273 nj_reset(struct tiger_hw *card) 274 { 275 outb(0xff, card->base + NJ_CTRL); /* Reset On */ 276 mdelay(1); 277 278 /* now edge triggered for TJ320 GE 13/07/00 */ 279 /* see comment in IRQ function */ 280 if (card->typ == NETJET_S_TJ320) /* TJ320 */ 281 card->ctrlreg = 0x40; /* Reset Off and status read clear */ 282 else 283 card->ctrlreg = 0x00; /* Reset Off and status read clear */ 284 outb(card->ctrlreg, card->base + NJ_CTRL); 285 mdelay(10); 286 287 /* configure AUX pins (all output except ISAC IRQ pin) */ 288 card->auxd = 0; 289 card->dmactrl = 0; 290 outb(~NJ_ISACIRQ, card->base + NJ_AUXCTRL); 291 outb(NJ_ISACIRQ, card->base + NJ_IRQMASK1); 292 outb(card->auxd, card->base + NJ_AUXDATA); 293 } 294 295 static int 296 inittiger(struct tiger_hw *card) 297 { 298 int i; 299 300 card->dma_p = dma_alloc_coherent(&card->pdev->dev, NJ_DMA_SIZE, 301 &card->dma, GFP_ATOMIC); 302 if (!card->dma_p) { 303 pr_info("%s: No DMA memory\n", card->name); 304 return -ENOMEM; 305 } 306 if ((u64)card->dma > 0xffffffff) { 307 pr_info("%s: DMA outside 32 bit\n", card->name); 308 return -ENOMEM; 309 } 310 for (i = 0; i < 2; i++) { 311 card->bc[i].hsbuf = kmalloc(NJ_DMA_TXSIZE, GFP_ATOMIC); 312 if (!card->bc[i].hsbuf) { 313 pr_info("%s: no B%d send buffer\n", card->name, i + 1); 314 return -ENOMEM; 315 } 316 card->bc[i].hrbuf = kmalloc(NJ_DMA_RXSIZE, GFP_ATOMIC); 317 if (!card->bc[i].hrbuf) { 318 pr_info("%s: no B%d recv buffer\n", card->name, i + 1); 319 return -ENOMEM; 320 } 321 } 322 memset(card->dma_p, 0xff, NJ_DMA_SIZE); 323 324 card->send.start = card->dma_p; 325 card->send.dmastart = (u32)card->dma; 326 card->send.dmaend = card->send.dmastart + 327 (4 * (NJ_DMA_TXSIZE - 1)); 328 card->send.dmairq = card->send.dmastart + 329 (4 * ((NJ_DMA_TXSIZE / 2) - 1)); 330 card->send.size = NJ_DMA_TXSIZE; 331 332 if (debug & DEBUG_HW) 333 pr_notice("%s: send buffer phy %#x - %#x - %#x virt %p" 334 " size %zu u32\n", card->name, 335 card->send.dmastart, card->send.dmairq, 336 card->send.dmaend, card->send.start, card->send.size); 337 338 outl(card->send.dmastart, card->base + NJ_DMA_READ_START); 339 outl(card->send.dmairq, card->base + NJ_DMA_READ_IRQ); 340 outl(card->send.dmaend, card->base + NJ_DMA_READ_END); 341 342 card->recv.start = card->dma_p + (NJ_DMA_SIZE / 2); 343 card->recv.dmastart = (u32)card->dma + (NJ_DMA_SIZE / 2); 344 card->recv.dmaend = card->recv.dmastart + 345 (4 * (NJ_DMA_RXSIZE - 1)); 346 card->recv.dmairq = card->recv.dmastart + 347 (4 * ((NJ_DMA_RXSIZE / 2) - 1)); 348 card->recv.size = NJ_DMA_RXSIZE; 349 350 if (debug & DEBUG_HW) 351 pr_notice("%s: recv buffer phy %#x - %#x - %#x virt %p" 352 " size %zu u32\n", card->name, 353 card->recv.dmastart, card->recv.dmairq, 354 card->recv.dmaend, card->recv.start, card->recv.size); 355 356 outl(card->recv.dmastart, card->base + NJ_DMA_WRITE_START); 357 outl(card->recv.dmairq, card->base + NJ_DMA_WRITE_IRQ); 358 outl(card->recv.dmaend, card->base + NJ_DMA_WRITE_END); 359 return 0; 360 } 361 362 static void 363 read_dma(struct tiger_ch *bc, u32 idx, int cnt) 364 { 365 struct tiger_hw *card = bc->bch.hw; 366 int i, stat; 367 u32 val; 368 u8 *p, *pn; 369 370 if (bc->lastrx == idx) { 371 bc->rxstate |= RX_OVERRUN; 372 pr_info("%s: B%1d overrun at idx %d\n", card->name, 373 bc->bch.nr, idx); 374 } 375 bc->lastrx = idx; 376 if (test_bit(FLG_RX_OFF, &bc->bch.Flags)) { 377 bc->bch.dropcnt += cnt; 378 return; 379 } 380 stat = bchannel_get_rxbuf(&bc->bch, cnt); 381 /* only transparent use the count here, HDLC overun is detected later */ 382 if (stat == -ENOMEM) { 383 pr_warn("%s.B%d: No memory for %d bytes\n", 384 card->name, bc->bch.nr, cnt); 385 return; 386 } 387 if (test_bit(FLG_TRANSPARENT, &bc->bch.Flags)) 388 p = skb_put(bc->bch.rx_skb, cnt); 389 else 390 p = bc->hrbuf; 391 392 for (i = 0; i < cnt; i++) { 393 val = card->recv.start[idx++]; 394 if (bc->bch.nr & 2) 395 val >>= 8; 396 if (idx >= card->recv.size) 397 idx = 0; 398 p[i] = val & 0xff; 399 } 400 401 if (test_bit(FLG_TRANSPARENT, &bc->bch.Flags)) { 402 recv_Bchannel(&bc->bch, 0, false); 403 return; 404 } 405 406 pn = bc->hrbuf; 407 while (cnt > 0) { 408 stat = isdnhdlc_decode(&bc->hrecv, pn, cnt, &i, 409 bc->bch.rx_skb->data, bc->bch.maxlen); 410 if (stat > 0) { /* valid frame received */ 411 p = skb_put(bc->bch.rx_skb, stat); 412 if (debug & DEBUG_HW_BFIFO) { 413 snprintf(card->log, LOG_SIZE, 414 "B%1d-recv %s %d ", bc->bch.nr, 415 card->name, stat); 416 print_hex_dump_bytes(card->log, 417 DUMP_PREFIX_OFFSET, p, 418 stat); 419 } 420 recv_Bchannel(&bc->bch, 0, false); 421 stat = bchannel_get_rxbuf(&bc->bch, bc->bch.maxlen); 422 if (stat < 0) { 423 pr_warn("%s.B%d: No memory for %d bytes\n", 424 card->name, bc->bch.nr, cnt); 425 return; 426 } 427 } else if (stat == -HDLC_CRC_ERROR) { 428 pr_info("%s: B%1d receive frame CRC error\n", 429 card->name, bc->bch.nr); 430 } else if (stat == -HDLC_FRAMING_ERROR) { 431 pr_info("%s: B%1d receive framing error\n", 432 card->name, bc->bch.nr); 433 } else if (stat == -HDLC_LENGTH_ERROR) { 434 pr_info("%s: B%1d receive frame too long (> %d)\n", 435 card->name, bc->bch.nr, bc->bch.maxlen); 436 } 437 pn += i; 438 cnt -= i; 439 } 440 } 441 442 static void 443 recv_tiger(struct tiger_hw *card, u8 irq_stat) 444 { 445 u32 idx; 446 int cnt = card->recv.size / 2; 447 448 /* Note receive is via the WRITE DMA channel */ 449 card->last_is0 &= ~NJ_IRQM0_WR_MASK; 450 card->last_is0 |= (irq_stat & NJ_IRQM0_WR_MASK); 451 452 if (irq_stat & NJ_IRQM0_WR_END) 453 idx = cnt - 1; 454 else 455 idx = card->recv.size - 1; 456 457 if (test_bit(FLG_ACTIVE, &card->bc[0].bch.Flags)) 458 read_dma(&card->bc[0], idx, cnt); 459 if (test_bit(FLG_ACTIVE, &card->bc[1].bch.Flags)) 460 read_dma(&card->bc[1], idx, cnt); 461 } 462 463 /* sync with current DMA address at start or after exception */ 464 static void 465 resync(struct tiger_ch *bc, struct tiger_hw *card) 466 { 467 card->send.dmacur = inl(card->base | NJ_DMA_READ_ADR); 468 card->send.idx = (card->send.dmacur - card->send.dmastart) >> 2; 469 if (bc->free > card->send.size / 2) 470 bc->free = card->send.size / 2; 471 /* currently we simple sync to the next complete free area 472 * this hast the advantage that we have always maximum time to 473 * handle TX irq 474 */ 475 if (card->send.idx < ((card->send.size / 2) - 1)) 476 bc->idx = (card->recv.size / 2) - 1; 477 else 478 bc->idx = card->recv.size - 1; 479 bc->txstate = TX_RUN; 480 pr_debug("%s: %s B%1d free %d idx %d/%d\n", card->name, 481 __func__, bc->bch.nr, bc->free, bc->idx, card->send.idx); 482 } 483 484 static int bc_next_frame(struct tiger_ch *); 485 486 static void 487 fill_hdlc_flag(struct tiger_ch *bc) 488 { 489 struct tiger_hw *card = bc->bch.hw; 490 int count, i; 491 u32 m, v; 492 u8 *p; 493 494 if (bc->free == 0) 495 return; 496 pr_debug("%s: %s B%1d %d state %x idx %d/%d\n", card->name, 497 __func__, bc->bch.nr, bc->free, bc->txstate, 498 bc->idx, card->send.idx); 499 if (bc->txstate & (TX_IDLE | TX_INIT | TX_UNDERRUN)) 500 resync(bc, card); 501 count = isdnhdlc_encode(&bc->hsend, NULL, 0, &i, 502 bc->hsbuf, bc->free); 503 pr_debug("%s: B%1d hdlc encoded %d flags\n", card->name, 504 bc->bch.nr, count); 505 bc->free -= count; 506 p = bc->hsbuf; 507 m = (bc->bch.nr & 1) ? 0xffffff00 : 0xffff00ff; 508 for (i = 0; i < count; i++) { 509 if (bc->idx >= card->send.size) 510 bc->idx = 0; 511 v = card->send.start[bc->idx]; 512 v &= m; 513 v |= (bc->bch.nr & 1) ? (u32)(p[i]) : ((u32)(p[i])) << 8; 514 card->send.start[bc->idx++] = v; 515 } 516 if (debug & DEBUG_HW_BFIFO) { 517 snprintf(card->log, LOG_SIZE, "B%1d-send %s %d ", 518 bc->bch.nr, card->name, count); 519 print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, p, count); 520 } 521 } 522 523 static void 524 fill_dma(struct tiger_ch *bc) 525 { 526 struct tiger_hw *card = bc->bch.hw; 527 int count, i, fillempty = 0; 528 u32 m, v, n = 0; 529 u8 *p; 530 531 if (bc->free == 0) 532 return; 533 if (!bc->bch.tx_skb) { 534 if (!test_bit(FLG_TX_EMPTY, &bc->bch.Flags)) 535 return; 536 fillempty = 1; 537 count = card->send.size >> 1; 538 p = bc->bch.fill; 539 } else { 540 count = bc->bch.tx_skb->len - bc->bch.tx_idx; 541 if (count <= 0) 542 return; 543 pr_debug("%s: %s B%1d %d/%d/%d/%d state %x idx %d/%d\n", 544 card->name, __func__, bc->bch.nr, count, bc->free, 545 bc->bch.tx_idx, bc->bch.tx_skb->len, bc->txstate, 546 bc->idx, card->send.idx); 547 p = bc->bch.tx_skb->data + bc->bch.tx_idx; 548 } 549 if (bc->txstate & (TX_IDLE | TX_INIT | TX_UNDERRUN)) 550 resync(bc, card); 551 if (test_bit(FLG_HDLC, &bc->bch.Flags) && !fillempty) { 552 count = isdnhdlc_encode(&bc->hsend, p, count, &i, 553 bc->hsbuf, bc->free); 554 pr_debug("%s: B%1d hdlc encoded %d in %d\n", card->name, 555 bc->bch.nr, i, count); 556 bc->bch.tx_idx += i; 557 bc->free -= count; 558 p = bc->hsbuf; 559 } else { 560 if (count > bc->free) 561 count = bc->free; 562 if (!fillempty) 563 bc->bch.tx_idx += count; 564 bc->free -= count; 565 } 566 m = (bc->bch.nr & 1) ? 0xffffff00 : 0xffff00ff; 567 if (fillempty) { 568 n = p[0]; 569 if (!(bc->bch.nr & 1)) 570 n <<= 8; 571 for (i = 0; i < count; i++) { 572 if (bc->idx >= card->send.size) 573 bc->idx = 0; 574 v = card->send.start[bc->idx]; 575 v &= m; 576 v |= n; 577 card->send.start[bc->idx++] = v; 578 } 579 } else { 580 for (i = 0; i < count; i++) { 581 if (bc->idx >= card->send.size) 582 bc->idx = 0; 583 v = card->send.start[bc->idx]; 584 v &= m; 585 n = p[i]; 586 v |= (bc->bch.nr & 1) ? n : n << 8; 587 card->send.start[bc->idx++] = v; 588 } 589 } 590 if (debug & DEBUG_HW_BFIFO) { 591 snprintf(card->log, LOG_SIZE, "B%1d-send %s %d ", 592 bc->bch.nr, card->name, count); 593 print_hex_dump_bytes(card->log, DUMP_PREFIX_OFFSET, p, count); 594 } 595 if (bc->free) 596 bc_next_frame(bc); 597 } 598 599 600 static int 601 bc_next_frame(struct tiger_ch *bc) 602 { 603 int ret = 1; 604 605 if (bc->bch.tx_skb && bc->bch.tx_idx < bc->bch.tx_skb->len) { 606 fill_dma(bc); 607 } else { 608 dev_kfree_skb(bc->bch.tx_skb); 609 if (get_next_bframe(&bc->bch)) { 610 fill_dma(bc); 611 test_and_clear_bit(FLG_TX_EMPTY, &bc->bch.Flags); 612 } else if (test_bit(FLG_TX_EMPTY, &bc->bch.Flags)) { 613 fill_dma(bc); 614 } else if (test_bit(FLG_FILLEMPTY, &bc->bch.Flags)) { 615 test_and_set_bit(FLG_TX_EMPTY, &bc->bch.Flags); 616 ret = 0; 617 } else { 618 ret = 0; 619 } 620 } 621 return ret; 622 } 623 624 static void 625 send_tiger_bc(struct tiger_hw *card, struct tiger_ch *bc) 626 { 627 int ret; 628 629 bc->free += card->send.size / 2; 630 if (bc->free >= card->send.size) { 631 if (!(bc->txstate & (TX_UNDERRUN | TX_INIT))) { 632 pr_info("%s: B%1d TX underrun state %x\n", card->name, 633 bc->bch.nr, bc->txstate); 634 bc->txstate |= TX_UNDERRUN; 635 } 636 bc->free = card->send.size; 637 } 638 ret = bc_next_frame(bc); 639 if (!ret) { 640 if (test_bit(FLG_HDLC, &bc->bch.Flags)) { 641 fill_hdlc_flag(bc); 642 return; 643 } 644 pr_debug("%s: B%1d TX no data free %d idx %d/%d\n", card->name, 645 bc->bch.nr, bc->free, bc->idx, card->send.idx); 646 if (!(bc->txstate & (TX_IDLE | TX_INIT))) { 647 fill_mem(bc, bc->idx, bc->free, 0xff); 648 if (bc->free == card->send.size) 649 bc->txstate |= TX_IDLE; 650 } 651 } 652 } 653 654 static void 655 send_tiger(struct tiger_hw *card, u8 irq_stat) 656 { 657 int i; 658 659 /* Note send is via the READ DMA channel */ 660 if ((irq_stat & card->last_is0) & NJ_IRQM0_RD_MASK) { 661 pr_info("%s: tiger warn write double dma %x/%x\n", 662 card->name, irq_stat, card->last_is0); 663 return; 664 } else { 665 card->last_is0 &= ~NJ_IRQM0_RD_MASK; 666 card->last_is0 |= (irq_stat & NJ_IRQM0_RD_MASK); 667 } 668 for (i = 0; i < 2; i++) { 669 if (test_bit(FLG_ACTIVE, &card->bc[i].bch.Flags)) 670 send_tiger_bc(card, &card->bc[i]); 671 } 672 } 673 674 static irqreturn_t 675 nj_irq(int intno, void *dev_id) 676 { 677 struct tiger_hw *card = dev_id; 678 u8 val, s1val, s0val; 679 680 spin_lock(&card->lock); 681 s0val = inb(card->base | NJ_IRQSTAT0); 682 s1val = inb(card->base | NJ_IRQSTAT1); 683 if ((s1val & NJ_ISACIRQ) && (s0val == 0)) { 684 /* shared IRQ */ 685 spin_unlock(&card->lock); 686 return IRQ_NONE; 687 } 688 pr_debug("%s: IRQSTAT0 %02x IRQSTAT1 %02x\n", card->name, s0val, s1val); 689 card->irqcnt++; 690 if (!(s1val & NJ_ISACIRQ)) { 691 val = ReadISAC_nj(card, ISAC_ISTA); 692 if (val) 693 mISDNisac_irq(&card->isac, val); 694 } 695 696 if (s0val) 697 /* write to clear */ 698 outb(s0val, card->base | NJ_IRQSTAT0); 699 else 700 goto end; 701 s1val = s0val; 702 /* set bits in sval to indicate which page is free */ 703 card->recv.dmacur = inl(card->base | NJ_DMA_WRITE_ADR); 704 card->recv.idx = (card->recv.dmacur - card->recv.dmastart) >> 2; 705 if (card->recv.dmacur < card->recv.dmairq) 706 s0val = 0x08; /* the 2nd write area is free */ 707 else 708 s0val = 0x04; /* the 1st write area is free */ 709 710 card->send.dmacur = inl(card->base | NJ_DMA_READ_ADR); 711 card->send.idx = (card->send.dmacur - card->send.dmastart) >> 2; 712 if (card->send.dmacur < card->send.dmairq) 713 s0val |= 0x02; /* the 2nd read area is free */ 714 else 715 s0val |= 0x01; /* the 1st read area is free */ 716 717 pr_debug("%s: DMA Status %02x/%02x/%02x %d/%d\n", card->name, 718 s1val, s0val, card->last_is0, 719 card->recv.idx, card->send.idx); 720 /* test if we have a DMA interrupt */ 721 if (s0val != card->last_is0) { 722 if ((s0val & NJ_IRQM0_RD_MASK) != 723 (card->last_is0 & NJ_IRQM0_RD_MASK)) 724 /* got a write dma int */ 725 send_tiger(card, s0val); 726 if ((s0val & NJ_IRQM0_WR_MASK) != 727 (card->last_is0 & NJ_IRQM0_WR_MASK)) 728 /* got a read dma int */ 729 recv_tiger(card, s0val); 730 } 731 end: 732 spin_unlock(&card->lock); 733 return IRQ_HANDLED; 734 } 735 736 static int 737 nj_l2l1B(struct mISDNchannel *ch, struct sk_buff *skb) 738 { 739 int ret = -EINVAL; 740 struct bchannel *bch = container_of(ch, struct bchannel, ch); 741 struct tiger_ch *bc = container_of(bch, struct tiger_ch, bch); 742 struct tiger_hw *card = bch->hw; 743 struct mISDNhead *hh = mISDN_HEAD_P(skb); 744 unsigned long flags; 745 746 switch (hh->prim) { 747 case PH_DATA_REQ: 748 spin_lock_irqsave(&card->lock, flags); 749 ret = bchannel_senddata(bch, skb); 750 if (ret > 0) { /* direct TX */ 751 fill_dma(bc); 752 ret = 0; 753 } 754 spin_unlock_irqrestore(&card->lock, flags); 755 return ret; 756 case PH_ACTIVATE_REQ: 757 spin_lock_irqsave(&card->lock, flags); 758 if (!test_and_set_bit(FLG_ACTIVE, &bch->Flags)) 759 ret = mode_tiger(bc, ch->protocol); 760 else 761 ret = 0; 762 spin_unlock_irqrestore(&card->lock, flags); 763 if (!ret) 764 _queue_data(ch, PH_ACTIVATE_IND, MISDN_ID_ANY, 0, 765 NULL, GFP_KERNEL); 766 break; 767 case PH_DEACTIVATE_REQ: 768 spin_lock_irqsave(&card->lock, flags); 769 mISDN_clear_bchannel(bch); 770 mode_tiger(bc, ISDN_P_NONE); 771 spin_unlock_irqrestore(&card->lock, flags); 772 _queue_data(ch, PH_DEACTIVATE_IND, MISDN_ID_ANY, 0, 773 NULL, GFP_KERNEL); 774 ret = 0; 775 break; 776 } 777 if (!ret) 778 dev_kfree_skb(skb); 779 return ret; 780 } 781 782 static int 783 channel_bctrl(struct tiger_ch *bc, struct mISDN_ctrl_req *cq) 784 { 785 return mISDN_ctrl_bchannel(&bc->bch, cq); 786 } 787 788 static int 789 nj_bctrl(struct mISDNchannel *ch, u32 cmd, void *arg) 790 { 791 struct bchannel *bch = container_of(ch, struct bchannel, ch); 792 struct tiger_ch *bc = container_of(bch, struct tiger_ch, bch); 793 struct tiger_hw *card = bch->hw; 794 int ret = -EINVAL; 795 u_long flags; 796 797 pr_debug("%s: %s cmd:%x %p\n", card->name, __func__, cmd, arg); 798 switch (cmd) { 799 case CLOSE_CHANNEL: 800 test_and_clear_bit(FLG_OPEN, &bch->Flags); 801 cancel_work_sync(&bch->workq); 802 spin_lock_irqsave(&card->lock, flags); 803 mISDN_clear_bchannel(bch); 804 mode_tiger(bc, ISDN_P_NONE); 805 spin_unlock_irqrestore(&card->lock, flags); 806 ch->protocol = ISDN_P_NONE; 807 ch->peer = NULL; 808 module_put(THIS_MODULE); 809 ret = 0; 810 break; 811 case CONTROL_CHANNEL: 812 ret = channel_bctrl(bc, arg); 813 break; 814 default: 815 pr_info("%s: %s unknown prim(%x)\n", card->name, __func__, cmd); 816 } 817 return ret; 818 } 819 820 static int 821 channel_ctrl(struct tiger_hw *card, struct mISDN_ctrl_req *cq) 822 { 823 int ret = 0; 824 825 switch (cq->op) { 826 case MISDN_CTRL_GETOP: 827 cq->op = MISDN_CTRL_LOOP | MISDN_CTRL_L1_TIMER3; 828 break; 829 case MISDN_CTRL_LOOP: 830 /* cq->channel: 0 disable, 1 B1 loop 2 B2 loop, 3 both */ 831 if (cq->channel < 0 || cq->channel > 3) { 832 ret = -EINVAL; 833 break; 834 } 835 ret = card->isac.ctrl(&card->isac, HW_TESTLOOP, cq->channel); 836 break; 837 case MISDN_CTRL_L1_TIMER3: 838 ret = card->isac.ctrl(&card->isac, HW_TIMER3_VALUE, cq->p1); 839 break; 840 default: 841 pr_info("%s: %s unknown Op %x\n", card->name, __func__, cq->op); 842 ret = -EINVAL; 843 break; 844 } 845 return ret; 846 } 847 848 static int 849 open_bchannel(struct tiger_hw *card, struct channel_req *rq) 850 { 851 struct bchannel *bch; 852 853 if (rq->adr.channel == 0 || rq->adr.channel > 2) 854 return -EINVAL; 855 if (rq->protocol == ISDN_P_NONE) 856 return -EINVAL; 857 bch = &card->bc[rq->adr.channel - 1].bch; 858 if (test_and_set_bit(FLG_OPEN, &bch->Flags)) 859 return -EBUSY; /* b-channel can be only open once */ 860 test_and_clear_bit(FLG_FILLEMPTY, &bch->Flags); 861 bch->ch.protocol = rq->protocol; 862 rq->ch = &bch->ch; 863 return 0; 864 } 865 866 /* 867 * device control function 868 */ 869 static int 870 nj_dctrl(struct mISDNchannel *ch, u32 cmd, void *arg) 871 { 872 struct mISDNdevice *dev = container_of(ch, struct mISDNdevice, D); 873 struct dchannel *dch = container_of(dev, struct dchannel, dev); 874 struct tiger_hw *card = dch->hw; 875 struct channel_req *rq; 876 int err = 0; 877 878 pr_debug("%s: %s cmd:%x %p\n", card->name, __func__, cmd, arg); 879 switch (cmd) { 880 case OPEN_CHANNEL: 881 rq = arg; 882 if (rq->protocol == ISDN_P_TE_S0) 883 err = card->isac.open(&card->isac, rq); 884 else 885 err = open_bchannel(card, rq); 886 if (err) 887 break; 888 if (!try_module_get(THIS_MODULE)) 889 pr_info("%s: cannot get module\n", card->name); 890 break; 891 case CLOSE_CHANNEL: 892 pr_debug("%s: dev(%d) close from %p\n", card->name, dch->dev.id, 893 __builtin_return_address(0)); 894 module_put(THIS_MODULE); 895 break; 896 case CONTROL_CHANNEL: 897 err = channel_ctrl(card, arg); 898 break; 899 default: 900 pr_debug("%s: %s unknown command %x\n", 901 card->name, __func__, cmd); 902 return -EINVAL; 903 } 904 return err; 905 } 906 907 static int 908 nj_init_card(struct tiger_hw *card) 909 { 910 u_long flags; 911 int ret; 912 913 spin_lock_irqsave(&card->lock, flags); 914 nj_disable_hwirq(card); 915 spin_unlock_irqrestore(&card->lock, flags); 916 917 card->irq = card->pdev->irq; 918 if (request_irq(card->irq, nj_irq, IRQF_SHARED, card->name, card)) { 919 pr_info("%s: couldn't get interrupt %d\n", 920 card->name, card->irq); 921 card->irq = -1; 922 return -EIO; 923 } 924 925 spin_lock_irqsave(&card->lock, flags); 926 nj_reset(card); 927 ret = card->isac.init(&card->isac); 928 if (ret) 929 goto error; 930 ret = inittiger(card); 931 if (ret) 932 goto error; 933 mode_tiger(&card->bc[0], ISDN_P_NONE); 934 mode_tiger(&card->bc[1], ISDN_P_NONE); 935 error: 936 spin_unlock_irqrestore(&card->lock, flags); 937 return ret; 938 } 939 940 941 static void 942 nj_release(struct tiger_hw *card) 943 { 944 u_long flags; 945 int i; 946 947 if (card->base_s) { 948 spin_lock_irqsave(&card->lock, flags); 949 nj_disable_hwirq(card); 950 mode_tiger(&card->bc[0], ISDN_P_NONE); 951 mode_tiger(&card->bc[1], ISDN_P_NONE); 952 spin_unlock_irqrestore(&card->lock, flags); 953 card->isac.release(&card->isac); 954 release_region(card->base, card->base_s); 955 card->base_s = 0; 956 } 957 if (card->irq > 0) 958 free_irq(card->irq, card); 959 if (card->isac.dch.dev.dev.class) 960 mISDN_unregister_device(&card->isac.dch.dev); 961 962 for (i = 0; i < 2; i++) { 963 mISDN_freebchannel(&card->bc[i].bch); 964 kfree(card->bc[i].hsbuf); 965 kfree(card->bc[i].hrbuf); 966 } 967 if (card->dma_p) 968 dma_free_coherent(&card->pdev->dev, NJ_DMA_SIZE, card->dma_p, 969 card->dma); 970 write_lock_irqsave(&card_lock, flags); 971 list_del(&card->list); 972 write_unlock_irqrestore(&card_lock, flags); 973 pci_clear_master(card->pdev); 974 pci_disable_device(card->pdev); 975 pci_set_drvdata(card->pdev, NULL); 976 kfree(card); 977 } 978 979 980 static int 981 nj_setup(struct tiger_hw *card) 982 { 983 card->base = pci_resource_start(card->pdev, 0); 984 card->base_s = pci_resource_len(card->pdev, 0); 985 if (!request_region(card->base, card->base_s, card->name)) { 986 pr_info("%s: NETjet config port %#x-%#x already in use\n", 987 card->name, card->base, 988 (u32)(card->base + card->base_s - 1)); 989 card->base_s = 0; 990 return -EIO; 991 } 992 ASSIGN_FUNC(nj, ISAC, card->isac); 993 return 0; 994 } 995 996 997 static int 998 setup_instance(struct tiger_hw *card) 999 { 1000 int i, err; 1001 u_long flags; 1002 1003 snprintf(card->name, MISDN_MAX_IDLEN - 1, "netjet.%d", nj_cnt + 1); 1004 write_lock_irqsave(&card_lock, flags); 1005 list_add_tail(&card->list, &Cards); 1006 write_unlock_irqrestore(&card_lock, flags); 1007 1008 _set_debug(card); 1009 card->isac.name = card->name; 1010 spin_lock_init(&card->lock); 1011 card->isac.hwlock = &card->lock; 1012 mISDNisac_init(&card->isac, card); 1013 1014 card->isac.dch.dev.Bprotocols = (1 << (ISDN_P_B_RAW & ISDN_P_B_MASK)) | 1015 (1 << (ISDN_P_B_HDLC & ISDN_P_B_MASK)); 1016 card->isac.dch.dev.D.ctrl = nj_dctrl; 1017 for (i = 0; i < 2; i++) { 1018 card->bc[i].bch.nr = i + 1; 1019 set_channelmap(i + 1, card->isac.dch.dev.channelmap); 1020 mISDN_initbchannel(&card->bc[i].bch, MAX_DATA_MEM, 1021 NJ_DMA_RXSIZE >> 1); 1022 card->bc[i].bch.hw = card; 1023 card->bc[i].bch.ch.send = nj_l2l1B; 1024 card->bc[i].bch.ch.ctrl = nj_bctrl; 1025 card->bc[i].bch.ch.nr = i + 1; 1026 list_add(&card->bc[i].bch.ch.list, 1027 &card->isac.dch.dev.bchannels); 1028 card->bc[i].bch.hw = card; 1029 } 1030 err = nj_setup(card); 1031 if (err) 1032 goto error; 1033 err = mISDN_register_device(&card->isac.dch.dev, &card->pdev->dev, 1034 card->name); 1035 if (err) 1036 goto error; 1037 err = nj_init_card(card); 1038 if (!err) { 1039 nj_cnt++; 1040 pr_notice("Netjet %d cards installed\n", nj_cnt); 1041 return 0; 1042 } 1043 error: 1044 nj_release(card); 1045 return err; 1046 } 1047 1048 static int 1049 nj_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 1050 { 1051 int err = -ENOMEM; 1052 int cfg; 1053 struct tiger_hw *card; 1054 1055 if (pdev->subsystem_vendor == 0x8086 && 1056 pdev->subsystem_device == 0x0003) { 1057 pr_notice("Netjet: Digium X100P/X101P not handled\n"); 1058 return -ENODEV; 1059 } 1060 1061 if (pdev->subsystem_vendor == 0x55 && 1062 pdev->subsystem_device == 0x02) { 1063 pr_notice("Netjet: Enter!Now not handled yet\n"); 1064 return -ENODEV; 1065 } 1066 1067 if (pdev->subsystem_vendor == 0xb100 && 1068 pdev->subsystem_device == 0x0003) { 1069 pr_notice("Netjet: Digium TDM400P not handled yet\n"); 1070 return -ENODEV; 1071 } 1072 1073 card = kzalloc(sizeof(struct tiger_hw), GFP_KERNEL); 1074 if (!card) { 1075 pr_info("No kmem for Netjet\n"); 1076 return err; 1077 } 1078 1079 card->pdev = pdev; 1080 1081 err = pci_enable_device(pdev); 1082 if (err) { 1083 kfree(card); 1084 return err; 1085 } 1086 1087 printk(KERN_INFO "nj_probe(mISDN): found adapter at %s\n", 1088 pci_name(pdev)); 1089 1090 pci_set_master(pdev); 1091 1092 /* the TJ300 and TJ320 must be detected, the IRQ handling is different 1093 * unfortunately the chips use the same device ID, but the TJ320 has 1094 * the bit20 in status PCI cfg register set 1095 */ 1096 pci_read_config_dword(pdev, 0x04, &cfg); 1097 if (cfg & 0x00100000) 1098 card->typ = NETJET_S_TJ320; 1099 else 1100 card->typ = NETJET_S_TJ300; 1101 1102 card->base = pci_resource_start(pdev, 0); 1103 pci_set_drvdata(pdev, card); 1104 err = setup_instance(card); 1105 if (err) 1106 pci_set_drvdata(pdev, NULL); 1107 1108 return err; 1109 } 1110 1111 1112 static void nj_remove(struct pci_dev *pdev) 1113 { 1114 struct tiger_hw *card = pci_get_drvdata(pdev); 1115 1116 if (card) 1117 nj_release(card); 1118 else 1119 pr_info("%s drvdata already removed\n", __func__); 1120 } 1121 1122 /* We cannot select cards with PCI_SUB... IDs, since here are cards with 1123 * SUB IDs set to PCI_ANY_ID, so we need to match all and reject 1124 * known other cards which not work with this driver - see probe function */ 1125 static const struct pci_device_id nj_pci_ids[] = { 1126 { PCI_VENDOR_ID_TIGERJET, PCI_DEVICE_ID_TIGERJET_300, 1127 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, 1128 { } 1129 }; 1130 MODULE_DEVICE_TABLE(pci, nj_pci_ids); 1131 1132 static struct pci_driver nj_driver = { 1133 .name = "netjet", 1134 .probe = nj_probe, 1135 .remove = nj_remove, 1136 .id_table = nj_pci_ids, 1137 }; 1138 1139 static int __init nj_init(void) 1140 { 1141 int err; 1142 1143 pr_notice("Netjet PCI driver Rev. %s\n", NETJET_REV); 1144 err = pci_register_driver(&nj_driver); 1145 return err; 1146 } 1147 1148 static void __exit nj_cleanup(void) 1149 { 1150 pci_unregister_driver(&nj_driver); 1151 } 1152 1153 module_init(nj_init); 1154 module_exit(nj_cleanup); 1155