1 /*****************************************************************************/ 2 3 /* 4 * baycom_epp.c -- baycom epp radio modem driver. 5 * 6 * Copyright (C) 1998-2000 7 * Thomas Sailer (sailer@ife.ee.ethz.ch) 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 as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 22 * 23 * Please note that the GPL allows you to use the driver, NOT the radio. 24 * In order to use the radio, you need a license from the communications 25 * authority of your country. 26 * 27 * 28 * History: 29 * 0.1 xx.xx.1998 Initial version by Matthias Welwarsky (dg2fef) 30 * 0.2 21.04.1998 Massive rework by Thomas Sailer 31 * Integrated FPGA EPP modem configuration routines 32 * 0.3 11.05.1998 Took FPGA config out and moved it into a separate program 33 * 0.4 26.07.1999 Adapted to new lowlevel parport driver interface 34 * 0.5 03.08.1999 adapt to Linus' new __setup/__initcall 35 * removed some pre-2.2 kernel compatibility cruft 36 * 0.6 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts 37 * 0.7 12.02.2000 adapted to softnet driver interface 38 * 39 */ 40 41 /*****************************************************************************/ 42 43 #include <linux/crc-ccitt.h> 44 #include <linux/module.h> 45 #include <linux/kernel.h> 46 #include <linux/init.h> 47 #include <linux/string.h> 48 #include <linux/workqueue.h> 49 #include <linux/fs.h> 50 #include <linux/parport.h> 51 #include <linux/if_arp.h> 52 #include <linux/hdlcdrv.h> 53 #include <linux/baycom.h> 54 #include <linux/jiffies.h> 55 #include <net/ax25.h> 56 #include <asm/uaccess.h> 57 58 /* --------------------------------------------------------------------- */ 59 60 #define BAYCOM_DEBUG 61 #define BAYCOM_MAGIC 19730510 62 63 /* --------------------------------------------------------------------- */ 64 65 static const char paranoia_str[] = KERN_ERR 66 "baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n"; 67 68 static const char bc_drvname[] = "baycom_epp"; 69 static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n" 70 KERN_INFO "baycom_epp: version 0.7 compiled " __TIME__ " " __DATE__ "\n"; 71 72 /* --------------------------------------------------------------------- */ 73 74 #define NR_PORTS 4 75 76 static struct net_device *baycom_device[NR_PORTS]; 77 78 /* --------------------------------------------------------------------- */ 79 80 /* EPP status register */ 81 #define EPP_DCDBIT 0x80 82 #define EPP_PTTBIT 0x08 83 #define EPP_NREF 0x01 84 #define EPP_NRAEF 0x02 85 #define EPP_NRHF 0x04 86 #define EPP_NTHF 0x20 87 #define EPP_NTAEF 0x10 88 #define EPP_NTEF EPP_PTTBIT 89 90 /* EPP control register */ 91 #define EPP_TX_FIFO_ENABLE 0x10 92 #define EPP_RX_FIFO_ENABLE 0x08 93 #define EPP_MODEM_ENABLE 0x20 94 #define EPP_LEDS 0xC0 95 #define EPP_IRQ_ENABLE 0x10 96 97 /* LPT registers */ 98 #define LPTREG_ECONTROL 0x402 99 #define LPTREG_CONFIGB 0x401 100 #define LPTREG_CONFIGA 0x400 101 #define LPTREG_EPPDATA 0x004 102 #define LPTREG_EPPADDR 0x003 103 #define LPTREG_CONTROL 0x002 104 #define LPTREG_STATUS 0x001 105 #define LPTREG_DATA 0x000 106 107 /* LPT control register */ 108 #define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */ 109 #define LPTCTRL_WRITE 0x01 110 #define LPTCTRL_ADDRSTB 0x08 111 #define LPTCTRL_DATASTB 0x02 112 #define LPTCTRL_INTEN 0x10 113 114 /* LPT status register */ 115 #define LPTSTAT_SHIFT_NINTR 6 116 #define LPTSTAT_WAIT 0x80 117 #define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR) 118 #define LPTSTAT_PE 0x20 119 #define LPTSTAT_DONE 0x10 120 #define LPTSTAT_NERROR 0x08 121 #define LPTSTAT_EPPTIMEOUT 0x01 122 123 /* LPT data register */ 124 #define LPTDATA_SHIFT_TDI 0 125 #define LPTDATA_SHIFT_TMS 2 126 #define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI) 127 #define LPTDATA_TCK 0x02 128 #define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS) 129 #define LPTDATA_INITBIAS 0x80 130 131 132 /* EPP modem config/status bits */ 133 #define EPP_DCDBIT 0x80 134 #define EPP_PTTBIT 0x08 135 #define EPP_RXEBIT 0x01 136 #define EPP_RXAEBIT 0x02 137 #define EPP_RXHFULL 0x04 138 139 #define EPP_NTHF 0x20 140 #define EPP_NTAEF 0x10 141 #define EPP_NTEF EPP_PTTBIT 142 143 #define EPP_TX_FIFO_ENABLE 0x10 144 #define EPP_RX_FIFO_ENABLE 0x08 145 #define EPP_MODEM_ENABLE 0x20 146 #define EPP_LEDS 0xC0 147 #define EPP_IRQ_ENABLE 0x10 148 149 /* Xilinx 4k JTAG instructions */ 150 #define XC4K_IRLENGTH 3 151 #define XC4K_EXTEST 0 152 #define XC4K_PRELOAD 1 153 #define XC4K_CONFIGURE 5 154 #define XC4K_BYPASS 7 155 156 #define EPP_CONVENTIONAL 0 157 #define EPP_FPGA 1 158 #define EPP_FPGAEXTSTATUS 2 159 160 #define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8) 161 162 /* ---------------------------------------------------------------------- */ 163 /* 164 * Information that need to be kept for each board. 165 */ 166 167 struct baycom_state { 168 int magic; 169 170 struct pardevice *pdev; 171 unsigned int work_running; 172 struct work_struct run_work; 173 unsigned int modem; 174 unsigned int bitrate; 175 unsigned char stat; 176 177 struct { 178 unsigned int intclk; 179 unsigned int fclk; 180 unsigned int bps; 181 unsigned int extmodem; 182 unsigned int loopback; 183 } cfg; 184 185 struct hdlcdrv_channel_params ch_params; 186 187 struct { 188 unsigned int bitbuf, bitstream, numbits, state; 189 unsigned char *bufptr; 190 int bufcnt; 191 unsigned char buf[TXBUFFER_SIZE]; 192 } hdlcrx; 193 194 struct { 195 int calibrate; 196 int slotcnt; 197 int flags; 198 enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state; 199 unsigned char *bufptr; 200 int bufcnt; 201 unsigned char buf[TXBUFFER_SIZE]; 202 } hdlctx; 203 204 struct net_device_stats stats; 205 unsigned int ptt_keyed; 206 struct sk_buff *skb; /* next transmit packet */ 207 208 #ifdef BAYCOM_DEBUG 209 struct debug_vals { 210 unsigned long last_jiffies; 211 unsigned cur_intcnt; 212 unsigned last_intcnt; 213 int cur_pllcorr; 214 int last_pllcorr; 215 unsigned int mod_cycles; 216 unsigned int demod_cycles; 217 } debug_vals; 218 #endif /* BAYCOM_DEBUG */ 219 }; 220 221 /* --------------------------------------------------------------------- */ 222 223 #define KISS_VERBOSE 224 225 /* --------------------------------------------------------------------- */ 226 227 #define PARAM_TXDELAY 1 228 #define PARAM_PERSIST 2 229 #define PARAM_SLOTTIME 3 230 #define PARAM_TXTAIL 4 231 #define PARAM_FULLDUP 5 232 #define PARAM_HARDWARE 6 233 #define PARAM_RETURN 255 234 235 /* --------------------------------------------------------------------- */ 236 /* 237 * the CRC routines are stolen from WAMPES 238 * by Dieter Deyke 239 */ 240 241 242 /*---------------------------------------------------------------------------*/ 243 244 #if 0 245 static inline void append_crc_ccitt(unsigned char *buffer, int len) 246 { 247 unsigned int crc = 0xffff; 248 249 for (;len>0;len--) 250 crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff]; 251 crc ^= 0xffff; 252 *buffer++ = crc; 253 *buffer++ = crc >> 8; 254 } 255 #endif 256 257 /*---------------------------------------------------------------------------*/ 258 259 static inline int check_crc_ccitt(const unsigned char *buf, int cnt) 260 { 261 return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8; 262 } 263 264 /*---------------------------------------------------------------------------*/ 265 266 static inline int calc_crc_ccitt(const unsigned char *buf, int cnt) 267 { 268 return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff; 269 } 270 271 /* ---------------------------------------------------------------------- */ 272 273 #define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800) 274 275 /* --------------------------------------------------------------------- */ 276 277 static inline void baycom_int_freq(struct baycom_state *bc) 278 { 279 #ifdef BAYCOM_DEBUG 280 unsigned long cur_jiffies = jiffies; 281 /* 282 * measure the interrupt frequency 283 */ 284 bc->debug_vals.cur_intcnt++; 285 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { 286 bc->debug_vals.last_jiffies = cur_jiffies; 287 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; 288 bc->debug_vals.cur_intcnt = 0; 289 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; 290 bc->debug_vals.cur_pllcorr = 0; 291 } 292 #endif /* BAYCOM_DEBUG */ 293 } 294 295 /* ---------------------------------------------------------------------- */ 296 /* 297 * eppconfig_path should be setable via /proc/sys. 298 */ 299 300 static char eppconfig_path[256] = "/usr/sbin/eppfpga"; 301 302 static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL }; 303 304 /* eppconfig: called during ifconfig up to configure the modem */ 305 static int eppconfig(struct baycom_state *bc) 306 { 307 char modearg[256]; 308 char portarg[16]; 309 char *argv[] = { eppconfig_path, "-s", "-p", portarg, "-m", modearg, 310 NULL }; 311 312 /* set up arguments */ 313 sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat", 314 bc->cfg.intclk ? "int" : "ext", 315 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, 316 (bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps), 317 bc->cfg.loopback ? ",loopback" : ""); 318 sprintf(portarg, "%ld", bc->pdev->port->base); 319 printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg); 320 321 return call_usermodehelper(eppconfig_path, argv, envp, 1); 322 } 323 324 /* ---------------------------------------------------------------------- */ 325 326 static void epp_interrupt(int irq, void *dev_id, struct pt_regs *regs) 327 { 328 } 329 330 /* ---------------------------------------------------------------------- */ 331 332 static inline void do_kiss_params(struct baycom_state *bc, 333 unsigned char *data, unsigned long len) 334 { 335 336 #ifdef KISS_VERBOSE 337 #define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b) 338 #else /* KISS_VERBOSE */ 339 #define PKP(a,b) 340 #endif /* KISS_VERBOSE */ 341 342 if (len < 2) 343 return; 344 switch(data[0]) { 345 case PARAM_TXDELAY: 346 bc->ch_params.tx_delay = data[1]; 347 PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay); 348 break; 349 case PARAM_PERSIST: 350 bc->ch_params.ppersist = data[1]; 351 PKP("p persistence = %u", bc->ch_params.ppersist); 352 break; 353 case PARAM_SLOTTIME: 354 bc->ch_params.slottime = data[1]; 355 PKP("slot time = %ums", bc->ch_params.slottime); 356 break; 357 case PARAM_TXTAIL: 358 bc->ch_params.tx_tail = data[1]; 359 PKP("TX tail = %ums", bc->ch_params.tx_tail); 360 break; 361 case PARAM_FULLDUP: 362 bc->ch_params.fulldup = !!data[1]; 363 PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half"); 364 break; 365 default: 366 break; 367 } 368 #undef PKP 369 } 370 371 /* --------------------------------------------------------------------- */ 372 373 static void encode_hdlc(struct baycom_state *bc) 374 { 375 struct sk_buff *skb; 376 unsigned char *wp, *bp; 377 int pkt_len; 378 unsigned bitstream, notbitstream, bitbuf, numbit, crc; 379 unsigned char crcarr[2]; 380 int j; 381 382 if (bc->hdlctx.bufcnt > 0) 383 return; 384 skb = bc->skb; 385 if (!skb) 386 return; 387 bc->skb = NULL; 388 pkt_len = skb->len-1; /* strip KISS byte */ 389 wp = bc->hdlctx.buf; 390 bp = skb->data+1; 391 crc = calc_crc_ccitt(bp, pkt_len); 392 crcarr[0] = crc; 393 crcarr[1] = crc >> 8; 394 *wp++ = 0x7e; 395 bitstream = bitbuf = numbit = 0; 396 while (pkt_len > -2) { 397 bitstream >>= 8; 398 bitstream |= ((unsigned int)*bp) << 8; 399 bitbuf |= ((unsigned int)*bp) << numbit; 400 notbitstream = ~bitstream; 401 bp++; 402 pkt_len--; 403 if (!pkt_len) 404 bp = crcarr; 405 for (j = 0; j < 8; j++) 406 if (unlikely(!(notbitstream & (0x1f0 << j)))) { 407 bitstream &= ~(0x100 << j); 408 bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) | 409 ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1); 410 numbit++; 411 notbitstream = ~bitstream; 412 } 413 numbit += 8; 414 while (numbit >= 8) { 415 *wp++ = bitbuf; 416 bitbuf >>= 8; 417 numbit -= 8; 418 } 419 } 420 bitbuf |= 0x7e7e << numbit; 421 numbit += 16; 422 while (numbit >= 8) { 423 *wp++ = bitbuf; 424 bitbuf >>= 8; 425 numbit -= 8; 426 } 427 bc->hdlctx.bufptr = bc->hdlctx.buf; 428 bc->hdlctx.bufcnt = wp - bc->hdlctx.buf; 429 dev_kfree_skb(skb); 430 bc->stats.tx_packets++; 431 } 432 433 /* ---------------------------------------------------------------------- */ 434 435 static unsigned short random_seed; 436 437 static inline unsigned short random_num(void) 438 { 439 random_seed = 28629 * random_seed + 157; 440 return random_seed; 441 } 442 443 /* ---------------------------------------------------------------------- */ 444 445 static int transmit(struct baycom_state *bc, int cnt, unsigned char stat) 446 { 447 struct parport *pp = bc->pdev->port; 448 unsigned char tmp[128]; 449 int i, j; 450 451 if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT)) 452 bc->hdlctx.state = tx_idle; 453 if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) { 454 if (bc->hdlctx.bufcnt <= 0) 455 encode_hdlc(bc); 456 if (bc->hdlctx.bufcnt <= 0) 457 return 0; 458 if (!bc->ch_params.fulldup) { 459 if (!(stat & EPP_DCDBIT)) { 460 bc->hdlctx.slotcnt = bc->ch_params.slottime; 461 return 0; 462 } 463 if ((--bc->hdlctx.slotcnt) > 0) 464 return 0; 465 bc->hdlctx.slotcnt = bc->ch_params.slottime; 466 if ((random_num() % 256) > bc->ch_params.ppersist) 467 return 0; 468 } 469 } 470 if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) { 471 bc->hdlctx.state = tx_keyup; 472 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay); 473 bc->ptt_keyed++; 474 } 475 while (cnt > 0) { 476 switch (bc->hdlctx.state) { 477 case tx_keyup: 478 i = min_t(int, cnt, bc->hdlctx.flags); 479 cnt -= i; 480 bc->hdlctx.flags -= i; 481 if (bc->hdlctx.flags <= 0) 482 bc->hdlctx.state = tx_data; 483 memset(tmp, 0x7e, sizeof(tmp)); 484 while (i > 0) { 485 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 486 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 487 return -1; 488 i -= j; 489 } 490 break; 491 492 case tx_data: 493 if (bc->hdlctx.bufcnt <= 0) { 494 encode_hdlc(bc); 495 if (bc->hdlctx.bufcnt <= 0) { 496 bc->hdlctx.state = tx_tail; 497 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail); 498 break; 499 } 500 } 501 i = min_t(int, cnt, bc->hdlctx.bufcnt); 502 bc->hdlctx.bufcnt -= i; 503 cnt -= i; 504 if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0)) 505 return -1; 506 bc->hdlctx.bufptr += i; 507 break; 508 509 case tx_tail: 510 encode_hdlc(bc); 511 if (bc->hdlctx.bufcnt > 0) { 512 bc->hdlctx.state = tx_data; 513 break; 514 } 515 i = min_t(int, cnt, bc->hdlctx.flags); 516 if (i) { 517 cnt -= i; 518 bc->hdlctx.flags -= i; 519 memset(tmp, 0x7e, sizeof(tmp)); 520 while (i > 0) { 521 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 522 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 523 return -1; 524 i -= j; 525 } 526 break; 527 } 528 529 default: /* fall through */ 530 if (bc->hdlctx.calibrate <= 0) 531 return 0; 532 i = min_t(int, cnt, bc->hdlctx.calibrate); 533 cnt -= i; 534 bc->hdlctx.calibrate -= i; 535 memset(tmp, 0, sizeof(tmp)); 536 while (i > 0) { 537 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 538 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 539 return -1; 540 i -= j; 541 } 542 break; 543 } 544 } 545 return 0; 546 } 547 548 /* ---------------------------------------------------------------------- */ 549 550 static void do_rxpacket(struct net_device *dev) 551 { 552 struct baycom_state *bc = netdev_priv(dev); 553 struct sk_buff *skb; 554 unsigned char *cp; 555 unsigned pktlen; 556 557 if (bc->hdlcrx.bufcnt < 4) 558 return; 559 if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt)) 560 return; 561 pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */ 562 if (!(skb = dev_alloc_skb(pktlen))) { 563 printk("%s: memory squeeze, dropping packet\n", dev->name); 564 bc->stats.rx_dropped++; 565 return; 566 } 567 cp = skb_put(skb, pktlen); 568 *cp++ = 0; /* KISS kludge */ 569 memcpy(cp, bc->hdlcrx.buf, pktlen - 1); 570 skb->protocol = ax25_type_trans(skb, dev); 571 netif_rx(skb); 572 dev->last_rx = jiffies; 573 bc->stats.rx_packets++; 574 } 575 576 static int receive(struct net_device *dev, int cnt) 577 { 578 struct baycom_state *bc = netdev_priv(dev); 579 struct parport *pp = bc->pdev->port; 580 unsigned int bitbuf, notbitstream, bitstream, numbits, state; 581 unsigned char tmp[128]; 582 unsigned char *cp; 583 int cnt2, ret = 0; 584 int j; 585 586 numbits = bc->hdlcrx.numbits; 587 state = bc->hdlcrx.state; 588 bitstream = bc->hdlcrx.bitstream; 589 bitbuf = bc->hdlcrx.bitbuf; 590 while (cnt > 0) { 591 cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt; 592 cnt -= cnt2; 593 if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) { 594 ret = -1; 595 break; 596 } 597 cp = tmp; 598 for (; cnt2 > 0; cnt2--, cp++) { 599 bitstream >>= 8; 600 bitstream |= (*cp) << 8; 601 bitbuf >>= 8; 602 bitbuf |= (*cp) << 8; 603 numbits += 8; 604 notbitstream = ~bitstream; 605 for (j = 0; j < 8; j++) { 606 607 /* flag or abort */ 608 if (unlikely(!(notbitstream & (0x0fc << j)))) { 609 610 /* abort received */ 611 if (!(notbitstream & (0x1fc << j))) 612 state = 0; 613 614 /* not flag received */ 615 else if (!(bitstream & (0x1fe << j)) != (0x0fc << j)) { 616 if (state) 617 do_rxpacket(dev); 618 bc->hdlcrx.bufcnt = 0; 619 bc->hdlcrx.bufptr = bc->hdlcrx.buf; 620 state = 1; 621 numbits = 7-j; 622 } 623 } 624 625 /* stuffed bit */ 626 else if (unlikely((bitstream & (0x1f8 << j)) == (0xf8 << j))) { 627 numbits--; 628 bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1); 629 } 630 } 631 while (state && numbits >= 8) { 632 if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) { 633 state = 0; 634 } else { 635 *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits); 636 bc->hdlcrx.bufcnt++; 637 numbits -= 8; 638 } 639 } 640 } 641 } 642 bc->hdlcrx.numbits = numbits; 643 bc->hdlcrx.state = state; 644 bc->hdlcrx.bitstream = bitstream; 645 bc->hdlcrx.bitbuf = bitbuf; 646 return ret; 647 } 648 649 /* --------------------------------------------------------------------- */ 650 651 #ifdef __i386__ 652 #include <asm/msr.h> 653 #define GETTICK(x) \ 654 ({ \ 655 if (cpu_has_tsc) \ 656 rdtscl(x); \ 657 }) 658 #else /* __i386__ */ 659 #define GETTICK(x) 660 #endif /* __i386__ */ 661 662 static void epp_bh(struct net_device *dev) 663 { 664 struct baycom_state *bc; 665 struct parport *pp; 666 unsigned char stat; 667 unsigned char tmp[2]; 668 unsigned int time1 = 0, time2 = 0, time3 = 0; 669 int cnt, cnt2; 670 671 bc = netdev_priv(dev); 672 if (!bc->work_running) 673 return; 674 baycom_int_freq(bc); 675 pp = bc->pdev->port; 676 /* update status */ 677 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 678 goto epptimeout; 679 bc->stat = stat; 680 bc->debug_vals.last_pllcorr = stat; 681 GETTICK(time1); 682 if (bc->modem == EPP_FPGAEXTSTATUS) { 683 /* get input count */ 684 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1; 685 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 686 goto epptimeout; 687 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2) 688 goto epptimeout; 689 cnt = tmp[0] | (tmp[1] << 8); 690 cnt &= 0x7fff; 691 /* get output count */ 692 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2; 693 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 694 goto epptimeout; 695 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2) 696 goto epptimeout; 697 cnt2 = tmp[0] | (tmp[1] << 8); 698 cnt2 = 16384 - (cnt2 & 0x7fff); 699 /* return to normal */ 700 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE; 701 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 702 goto epptimeout; 703 if (transmit(bc, cnt2, stat)) 704 goto epptimeout; 705 GETTICK(time2); 706 if (receive(dev, cnt)) 707 goto epptimeout; 708 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 709 goto epptimeout; 710 bc->stat = stat; 711 } else { 712 /* try to tx */ 713 switch (stat & (EPP_NTAEF|EPP_NTHF)) { 714 case EPP_NTHF: 715 cnt = 2048 - 256; 716 break; 717 718 case EPP_NTAEF: 719 cnt = 2048 - 1793; 720 break; 721 722 case 0: 723 cnt = 0; 724 break; 725 726 default: 727 cnt = 2048 - 1025; 728 break; 729 } 730 if (transmit(bc, cnt, stat)) 731 goto epptimeout; 732 GETTICK(time2); 733 /* do receiver */ 734 while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) { 735 switch (stat & (EPP_NRAEF|EPP_NRHF)) { 736 case EPP_NRAEF: 737 cnt = 1025; 738 break; 739 740 case 0: 741 cnt = 1793; 742 break; 743 744 default: 745 cnt = 256; 746 break; 747 } 748 if (receive(dev, cnt)) 749 goto epptimeout; 750 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 751 goto epptimeout; 752 } 753 cnt = 0; 754 if (bc->bitrate < 50000) 755 cnt = 256; 756 else if (bc->bitrate < 100000) 757 cnt = 128; 758 while (cnt > 0 && stat & EPP_NREF) { 759 if (receive(dev, 1)) 760 goto epptimeout; 761 cnt--; 762 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 763 goto epptimeout; 764 } 765 } 766 GETTICK(time3); 767 #ifdef BAYCOM_DEBUG 768 bc->debug_vals.mod_cycles = time2 - time1; 769 bc->debug_vals.demod_cycles = time3 - time2; 770 #endif /* BAYCOM_DEBUG */ 771 schedule_delayed_work(&bc->run_work, 1); 772 if (!bc->skb) 773 netif_wake_queue(dev); 774 return; 775 epptimeout: 776 printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname); 777 } 778 779 /* ---------------------------------------------------------------------- */ 780 /* 781 * ===================== network driver interface ========================= 782 */ 783 784 static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev) 785 { 786 struct baycom_state *bc = netdev_priv(dev); 787 788 if (skb->data[0] != 0) { 789 do_kiss_params(bc, skb->data, skb->len); 790 dev_kfree_skb(skb); 791 return 0; 792 } 793 if (bc->skb) 794 return -1; 795 /* strip KISS byte */ 796 if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) { 797 dev_kfree_skb(skb); 798 return 0; 799 } 800 netif_stop_queue(dev); 801 bc->skb = skb; 802 return 0; 803 } 804 805 /* --------------------------------------------------------------------- */ 806 807 static int baycom_set_mac_address(struct net_device *dev, void *addr) 808 { 809 struct sockaddr *sa = (struct sockaddr *)addr; 810 811 /* addr is an AX.25 shifted ASCII mac address */ 812 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); 813 return 0; 814 } 815 816 /* --------------------------------------------------------------------- */ 817 818 static struct net_device_stats *baycom_get_stats(struct net_device *dev) 819 { 820 struct baycom_state *bc = netdev_priv(dev); 821 822 /* 823 * Get the current statistics. This may be called with the 824 * card open or closed. 825 */ 826 return &bc->stats; 827 } 828 829 /* --------------------------------------------------------------------- */ 830 831 static void epp_wakeup(void *handle) 832 { 833 struct net_device *dev = (struct net_device *)handle; 834 struct baycom_state *bc = netdev_priv(dev); 835 836 printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name); 837 if (!parport_claim(bc->pdev)) 838 printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name); 839 } 840 841 /* --------------------------------------------------------------------- */ 842 843 /* 844 * Open/initialize the board. This is called (in the current kernel) 845 * sometime after booting when the 'ifconfig' program is run. 846 * 847 * This routine should set everything up anew at each open, even 848 * registers that "should" only need to be set once at boot, so that 849 * there is non-reboot way to recover if something goes wrong. 850 */ 851 852 static int epp_open(struct net_device *dev) 853 { 854 struct baycom_state *bc = netdev_priv(dev); 855 struct parport *pp = parport_find_base(dev->base_addr); 856 unsigned int i, j; 857 unsigned char tmp[128]; 858 unsigned char stat; 859 unsigned long tstart; 860 861 if (!pp) { 862 printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr); 863 return -ENXIO; 864 } 865 #if 0 866 if (pp->irq < 0) { 867 printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base); 868 parport_put_port(pp); 869 return -ENXIO; 870 } 871 #endif 872 if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) { 873 printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n", 874 bc_drvname, pp->base); 875 parport_put_port(pp); 876 return -EIO; 877 } 878 memset(&bc->modem, 0, sizeof(bc->modem)); 879 bc->pdev = parport_register_device(pp, dev->name, NULL, epp_wakeup, 880 epp_interrupt, PARPORT_DEV_EXCL, dev); 881 parport_put_port(pp); 882 if (!bc->pdev) { 883 printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base); 884 return -ENXIO; 885 } 886 if (parport_claim(bc->pdev)) { 887 printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base); 888 parport_unregister_device(bc->pdev); 889 return -EBUSY; 890 } 891 dev->irq = /*pp->irq*/ 0; 892 INIT_WORK(&bc->run_work, (void *)(void *)epp_bh, dev); 893 bc->work_running = 1; 894 bc->modem = EPP_CONVENTIONAL; 895 if (eppconfig(bc)) 896 printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname); 897 else 898 bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS; 899 parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */ 900 /* reset the modem */ 901 tmp[0] = 0; 902 tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE; 903 if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2) 904 goto epptimeout; 905 /* autoprobe baud rate */ 906 tstart = jiffies; 907 i = 0; 908 while (time_before(jiffies, tstart + HZ/3)) { 909 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 910 goto epptimeout; 911 if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) { 912 schedule(); 913 continue; 914 } 915 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128) 916 goto epptimeout; 917 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128) 918 goto epptimeout; 919 i += 256; 920 } 921 for (j = 0; j < 256; j++) { 922 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 923 goto epptimeout; 924 if (!(stat & EPP_NREF)) 925 break; 926 if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1) 927 goto epptimeout; 928 i++; 929 } 930 tstart = jiffies - tstart; 931 bc->bitrate = i * (8 * HZ) / tstart; 932 j = 1; 933 i = bc->bitrate >> 3; 934 while (j < 7 && i > 150) { 935 j++; 936 i >>= 1; 937 } 938 printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n", 939 bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2)); 940 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/; 941 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 942 goto epptimeout; 943 /* 944 * initialise hdlc variables 945 */ 946 bc->hdlcrx.state = 0; 947 bc->hdlcrx.numbits = 0; 948 bc->hdlctx.state = tx_idle; 949 bc->hdlctx.bufcnt = 0; 950 bc->hdlctx.slotcnt = bc->ch_params.slottime; 951 bc->hdlctx.calibrate = 0; 952 /* start the bottom half stuff */ 953 schedule_delayed_work(&bc->run_work, 1); 954 netif_start_queue(dev); 955 return 0; 956 957 epptimeout: 958 printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname); 959 parport_write_control(pp, 0); /* reset the adapter */ 960 parport_release(bc->pdev); 961 parport_unregister_device(bc->pdev); 962 return -EIO; 963 } 964 965 /* --------------------------------------------------------------------- */ 966 967 static int epp_close(struct net_device *dev) 968 { 969 struct baycom_state *bc = netdev_priv(dev); 970 struct parport *pp = bc->pdev->port; 971 unsigned char tmp[1]; 972 973 bc->work_running = 0; 974 flush_scheduled_work(); 975 bc->stat = EPP_DCDBIT; 976 tmp[0] = 0; 977 pp->ops->epp_write_addr(pp, tmp, 1, 0); 978 parport_write_control(pp, 0); /* reset the adapter */ 979 parport_release(bc->pdev); 980 parport_unregister_device(bc->pdev); 981 if (bc->skb) 982 dev_kfree_skb(bc->skb); 983 bc->skb = NULL; 984 printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n", 985 bc_drvname, dev->base_addr, dev->irq); 986 return 0; 987 } 988 989 /* --------------------------------------------------------------------- */ 990 991 static int baycom_setmode(struct baycom_state *bc, const char *modestr) 992 { 993 const char *cp; 994 995 if (strstr(modestr,"intclk")) 996 bc->cfg.intclk = 1; 997 if (strstr(modestr,"extclk")) 998 bc->cfg.intclk = 0; 999 if (strstr(modestr,"intmodem")) 1000 bc->cfg.extmodem = 0; 1001 if (strstr(modestr,"extmodem")) 1002 bc->cfg.extmodem = 1; 1003 if (strstr(modestr,"noloopback")) 1004 bc->cfg.loopback = 0; 1005 if (strstr(modestr,"loopback")) 1006 bc->cfg.loopback = 1; 1007 if ((cp = strstr(modestr,"fclk="))) { 1008 bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0); 1009 if (bc->cfg.fclk < 1000000) 1010 bc->cfg.fclk = 1000000; 1011 if (bc->cfg.fclk > 25000000) 1012 bc->cfg.fclk = 25000000; 1013 } 1014 if ((cp = strstr(modestr,"bps="))) { 1015 bc->cfg.bps = simple_strtoul(cp+4, NULL, 0); 1016 if (bc->cfg.bps < 1000) 1017 bc->cfg.bps = 1000; 1018 if (bc->cfg.bps > 1500000) 1019 bc->cfg.bps = 1500000; 1020 } 1021 return 0; 1022 } 1023 1024 /* --------------------------------------------------------------------- */ 1025 1026 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 1027 { 1028 struct baycom_state *bc = netdev_priv(dev); 1029 struct hdlcdrv_ioctl hi; 1030 1031 if (cmd != SIOCDEVPRIVATE) 1032 return -ENOIOCTLCMD; 1033 1034 if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi))) 1035 return -EFAULT; 1036 switch (hi.cmd) { 1037 default: 1038 return -ENOIOCTLCMD; 1039 1040 case HDLCDRVCTL_GETCHANNELPAR: 1041 hi.data.cp.tx_delay = bc->ch_params.tx_delay; 1042 hi.data.cp.tx_tail = bc->ch_params.tx_tail; 1043 hi.data.cp.slottime = bc->ch_params.slottime; 1044 hi.data.cp.ppersist = bc->ch_params.ppersist; 1045 hi.data.cp.fulldup = bc->ch_params.fulldup; 1046 break; 1047 1048 case HDLCDRVCTL_SETCHANNELPAR: 1049 if (!capable(CAP_NET_ADMIN)) 1050 return -EACCES; 1051 bc->ch_params.tx_delay = hi.data.cp.tx_delay; 1052 bc->ch_params.tx_tail = hi.data.cp.tx_tail; 1053 bc->ch_params.slottime = hi.data.cp.slottime; 1054 bc->ch_params.ppersist = hi.data.cp.ppersist; 1055 bc->ch_params.fulldup = hi.data.cp.fulldup; 1056 bc->hdlctx.slotcnt = 1; 1057 return 0; 1058 1059 case HDLCDRVCTL_GETMODEMPAR: 1060 hi.data.mp.iobase = dev->base_addr; 1061 hi.data.mp.irq = dev->irq; 1062 hi.data.mp.dma = dev->dma; 1063 hi.data.mp.dma2 = 0; 1064 hi.data.mp.seriobase = 0; 1065 hi.data.mp.pariobase = 0; 1066 hi.data.mp.midiiobase = 0; 1067 break; 1068 1069 case HDLCDRVCTL_SETMODEMPAR: 1070 if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev)) 1071 return -EACCES; 1072 dev->base_addr = hi.data.mp.iobase; 1073 dev->irq = /*hi.data.mp.irq*/0; 1074 dev->dma = /*hi.data.mp.dma*/0; 1075 return 0; 1076 1077 case HDLCDRVCTL_GETSTAT: 1078 hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT); 1079 hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT); 1080 hi.data.cs.ptt_keyed = bc->ptt_keyed; 1081 hi.data.cs.tx_packets = bc->stats.tx_packets; 1082 hi.data.cs.tx_errors = bc->stats.tx_errors; 1083 hi.data.cs.rx_packets = bc->stats.rx_packets; 1084 hi.data.cs.rx_errors = bc->stats.rx_errors; 1085 break; 1086 1087 case HDLCDRVCTL_OLDGETSTAT: 1088 hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT); 1089 hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT); 1090 hi.data.ocs.ptt_keyed = bc->ptt_keyed; 1091 break; 1092 1093 case HDLCDRVCTL_CALIBRATE: 1094 if (!capable(CAP_SYS_RAWIO)) 1095 return -EACCES; 1096 bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8; 1097 return 0; 1098 1099 case HDLCDRVCTL_DRIVERNAME: 1100 strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername)); 1101 break; 1102 1103 case HDLCDRVCTL_GETMODE: 1104 sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s", 1105 bc->cfg.intclk ? "int" : "ext", 1106 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, 1107 bc->cfg.loopback ? ",loopback" : ""); 1108 break; 1109 1110 case HDLCDRVCTL_SETMODE: 1111 if (!capable(CAP_NET_ADMIN) || netif_running(dev)) 1112 return -EACCES; 1113 hi.data.modename[sizeof(hi.data.modename)-1] = '\0'; 1114 return baycom_setmode(bc, hi.data.modename); 1115 1116 case HDLCDRVCTL_MODELIST: 1117 strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x", 1118 sizeof(hi.data.modename)); 1119 break; 1120 1121 case HDLCDRVCTL_MODEMPARMASK: 1122 return HDLCDRV_PARMASK_IOBASE; 1123 1124 } 1125 if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi))) 1126 return -EFAULT; 1127 return 0; 1128 } 1129 1130 /* --------------------------------------------------------------------- */ 1131 1132 /* 1133 * Check for a network adaptor of this type, and return '0' if one exists. 1134 * If dev->base_addr == 0, probe all likely locations. 1135 * If dev->base_addr == 1, always return failure. 1136 * If dev->base_addr == 2, allocate space for the device and return success 1137 * (detachable devices only). 1138 */ 1139 static void baycom_probe(struct net_device *dev) 1140 { 1141 static char ax25_bcast[AX25_ADDR_LEN] = { 1142 'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, '0' << 1 1143 }; 1144 static char ax25_nocall[AX25_ADDR_LEN] = { 1145 'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, '1' << 1 1146 }; 1147 const struct hdlcdrv_channel_params dflt_ch_params = { 1148 20, 2, 10, 40, 0 1149 }; 1150 struct baycom_state *bc; 1151 1152 /* 1153 * not a real probe! only initialize data structures 1154 */ 1155 bc = netdev_priv(dev); 1156 /* 1157 * initialize the baycom_state struct 1158 */ 1159 bc->ch_params = dflt_ch_params; 1160 bc->ptt_keyed = 0; 1161 1162 /* 1163 * initialize the device struct 1164 */ 1165 dev->open = epp_open; 1166 dev->stop = epp_close; 1167 dev->do_ioctl = baycom_ioctl; 1168 dev->hard_start_xmit = baycom_send_packet; 1169 dev->get_stats = baycom_get_stats; 1170 1171 /* Fill in the fields of the device structure */ 1172 bc->skb = NULL; 1173 1174 dev->hard_header = ax25_hard_header; 1175 dev->rebuild_header = ax25_rebuild_header; 1176 dev->set_mac_address = baycom_set_mac_address; 1177 1178 dev->type = ARPHRD_AX25; /* AF_AX25 device */ 1179 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN; 1180 dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */ 1181 dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */ 1182 memcpy(dev->broadcast, ax25_bcast, AX25_ADDR_LEN); 1183 memcpy(dev->dev_addr, ax25_nocall, AX25_ADDR_LEN); 1184 dev->tx_queue_len = 16; 1185 1186 /* New style flags */ 1187 dev->flags = 0; 1188 } 1189 1190 /* --------------------------------------------------------------------- */ 1191 1192 /* 1193 * command line settable parameters 1194 */ 1195 static const char *mode[NR_PORTS] = { "", }; 1196 static int iobase[NR_PORTS] = { 0x378, }; 1197 1198 module_param_array(mode, charp, NULL, 0); 1199 MODULE_PARM_DESC(mode, "baycom operating mode"); 1200 module_param_array(iobase, int, NULL, 0); 1201 MODULE_PARM_DESC(iobase, "baycom io base address"); 1202 1203 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); 1204 MODULE_DESCRIPTION("Baycom epp amateur radio modem driver"); 1205 MODULE_LICENSE("GPL"); 1206 1207 /* --------------------------------------------------------------------- */ 1208 1209 static void __init baycom_epp_dev_setup(struct net_device *dev) 1210 { 1211 struct baycom_state *bc = netdev_priv(dev); 1212 1213 /* 1214 * initialize part of the baycom_state struct 1215 */ 1216 bc->magic = BAYCOM_MAGIC; 1217 bc->cfg.fclk = 19666600; 1218 bc->cfg.bps = 9600; 1219 /* 1220 * initialize part of the device struct 1221 */ 1222 baycom_probe(dev); 1223 } 1224 1225 static int __init init_baycomepp(void) 1226 { 1227 int i, found = 0; 1228 char set_hw = 1; 1229 1230 printk(bc_drvinfo); 1231 /* 1232 * register net devices 1233 */ 1234 for (i = 0; i < NR_PORTS; i++) { 1235 struct net_device *dev; 1236 1237 dev = alloc_netdev(sizeof(struct baycom_state), "bce%d", 1238 baycom_epp_dev_setup); 1239 1240 if (!dev) { 1241 printk(KERN_WARNING "bce%d : out of memory\n", i); 1242 return found ? 0 : -ENOMEM; 1243 } 1244 1245 sprintf(dev->name, "bce%d", i); 1246 dev->base_addr = iobase[i]; 1247 1248 if (!mode[i]) 1249 set_hw = 0; 1250 if (!set_hw) 1251 iobase[i] = 0; 1252 1253 if (register_netdev(dev)) { 1254 printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name); 1255 free_netdev(dev); 1256 break; 1257 } 1258 if (set_hw && baycom_setmode(netdev_priv(dev), mode[i])) 1259 set_hw = 0; 1260 baycom_device[i] = dev; 1261 found++; 1262 } 1263 1264 return found ? 0 : -ENXIO; 1265 } 1266 1267 static void __exit cleanup_baycomepp(void) 1268 { 1269 int i; 1270 1271 for(i = 0; i < NR_PORTS; i++) { 1272 struct net_device *dev = baycom_device[i]; 1273 1274 if (dev) { 1275 struct baycom_state *bc = netdev_priv(dev); 1276 if (bc->magic == BAYCOM_MAGIC) { 1277 unregister_netdev(dev); 1278 free_netdev(dev); 1279 } else 1280 printk(paranoia_str, "cleanup_module"); 1281 } 1282 } 1283 } 1284 1285 module_init(init_baycomepp); 1286 module_exit(cleanup_baycomepp); 1287 1288 /* --------------------------------------------------------------------- */ 1289 1290 #ifndef MODULE 1291 1292 /* 1293 * format: baycom_epp=io,mode 1294 * mode: fpga config options 1295 */ 1296 1297 static int __init baycom_epp_setup(char *str) 1298 { 1299 static unsigned __initdata nr_dev = 0; 1300 int ints[2]; 1301 1302 if (nr_dev >= NR_PORTS) 1303 return 0; 1304 str = get_options(str, 2, ints); 1305 if (ints[0] < 1) 1306 return 0; 1307 mode[nr_dev] = str; 1308 iobase[nr_dev] = ints[1]; 1309 nr_dev++; 1310 return 1; 1311 } 1312 1313 __setup("baycom_epp=", baycom_epp_setup); 1314 1315 #endif /* MODULE */ 1316 /* --------------------------------------------------------------------- */ 1317