1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /*****************************************************************************/ 3 4 /* 5 * baycom_epp.c -- baycom epp radio modem driver. 6 * 7 * Copyright (C) 1998-2000 8 * Thomas Sailer (sailer@ife.ee.ethz.ch) 9 * 10 * Please note that the GPL allows you to use the driver, NOT the radio. 11 * In order to use the radio, you need a license from the communications 12 * authority of your country. 13 * 14 * History: 15 * 0.1 xx.xx.1998 Initial version by Matthias Welwarsky (dg2fef) 16 * 0.2 21.04.1998 Massive rework by Thomas Sailer 17 * Integrated FPGA EPP modem configuration routines 18 * 0.3 11.05.1998 Took FPGA config out and moved it into a separate program 19 * 0.4 26.07.1999 Adapted to new lowlevel parport driver interface 20 * 0.5 03.08.1999 adapt to Linus' new __setup/__initcall 21 * removed some pre-2.2 kernel compatibility cruft 22 * 0.6 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts 23 * 0.7 12.02.2000 adapted to softnet driver interface 24 */ 25 26 /*****************************************************************************/ 27 28 #include <linux/crc-ccitt.h> 29 #include <linux/module.h> 30 #include <linux/kernel.h> 31 #include <linux/init.h> 32 #include <linux/sched.h> 33 #include <linux/string.h> 34 #include <linux/workqueue.h> 35 #include <linux/fs.h> 36 #include <linux/parport.h> 37 #include <linux/if_arp.h> 38 #include <linux/hdlcdrv.h> 39 #include <linux/baycom.h> 40 #include <linux/jiffies.h> 41 #include <linux/random.h> 42 #include <net/ax25.h> 43 #include <linux/uaccess.h> 44 45 /* --------------------------------------------------------------------- */ 46 47 #define BAYCOM_DEBUG 48 #define BAYCOM_MAGIC 19730510 49 50 /* --------------------------------------------------------------------- */ 51 52 static const char paranoia_str[] = KERN_ERR 53 "baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n"; 54 55 static const char bc_drvname[] = "baycom_epp"; 56 static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n" 57 "baycom_epp: version 0.7\n"; 58 59 /* --------------------------------------------------------------------- */ 60 61 #define NR_PORTS 4 62 63 static struct net_device *baycom_device[NR_PORTS]; 64 65 /* --------------------------------------------------------------------- */ 66 67 /* EPP status register */ 68 #define EPP_DCDBIT 0x80 69 #define EPP_PTTBIT 0x08 70 #define EPP_NREF 0x01 71 #define EPP_NRAEF 0x02 72 #define EPP_NRHF 0x04 73 #define EPP_NTHF 0x20 74 #define EPP_NTAEF 0x10 75 #define EPP_NTEF EPP_PTTBIT 76 77 /* EPP control register */ 78 #define EPP_TX_FIFO_ENABLE 0x10 79 #define EPP_RX_FIFO_ENABLE 0x08 80 #define EPP_MODEM_ENABLE 0x20 81 #define EPP_LEDS 0xC0 82 #define EPP_IRQ_ENABLE 0x10 83 84 /* LPT registers */ 85 #define LPTREG_ECONTROL 0x402 86 #define LPTREG_CONFIGB 0x401 87 #define LPTREG_CONFIGA 0x400 88 #define LPTREG_EPPDATA 0x004 89 #define LPTREG_EPPADDR 0x003 90 #define LPTREG_CONTROL 0x002 91 #define LPTREG_STATUS 0x001 92 #define LPTREG_DATA 0x000 93 94 /* LPT control register */ 95 #define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */ 96 #define LPTCTRL_WRITE 0x01 97 #define LPTCTRL_ADDRSTB 0x08 98 #define LPTCTRL_DATASTB 0x02 99 #define LPTCTRL_INTEN 0x10 100 101 /* LPT status register */ 102 #define LPTSTAT_SHIFT_NINTR 6 103 #define LPTSTAT_WAIT 0x80 104 #define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR) 105 #define LPTSTAT_PE 0x20 106 #define LPTSTAT_DONE 0x10 107 #define LPTSTAT_NERROR 0x08 108 #define LPTSTAT_EPPTIMEOUT 0x01 109 110 /* LPT data register */ 111 #define LPTDATA_SHIFT_TDI 0 112 #define LPTDATA_SHIFT_TMS 2 113 #define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI) 114 #define LPTDATA_TCK 0x02 115 #define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS) 116 #define LPTDATA_INITBIAS 0x80 117 118 119 /* EPP modem config/status bits */ 120 #define EPP_DCDBIT 0x80 121 #define EPP_PTTBIT 0x08 122 #define EPP_RXEBIT 0x01 123 #define EPP_RXAEBIT 0x02 124 #define EPP_RXHFULL 0x04 125 126 #define EPP_NTHF 0x20 127 #define EPP_NTAEF 0x10 128 #define EPP_NTEF EPP_PTTBIT 129 130 #define EPP_TX_FIFO_ENABLE 0x10 131 #define EPP_RX_FIFO_ENABLE 0x08 132 #define EPP_MODEM_ENABLE 0x20 133 #define EPP_LEDS 0xC0 134 #define EPP_IRQ_ENABLE 0x10 135 136 /* Xilinx 4k JTAG instructions */ 137 #define XC4K_IRLENGTH 3 138 #define XC4K_EXTEST 0 139 #define XC4K_PRELOAD 1 140 #define XC4K_CONFIGURE 5 141 #define XC4K_BYPASS 7 142 143 #define EPP_CONVENTIONAL 0 144 #define EPP_FPGA 1 145 #define EPP_FPGAEXTSTATUS 2 146 147 #define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8) 148 149 /* ---------------------------------------------------------------------- */ 150 /* 151 * Information that need to be kept for each board. 152 */ 153 154 struct baycom_state { 155 int magic; 156 157 struct pardevice *pdev; 158 struct net_device *dev; 159 unsigned int work_running; 160 struct delayed_work run_work; 161 unsigned int modem; 162 unsigned int bitrate; 163 unsigned char stat; 164 165 struct { 166 unsigned int intclk; 167 unsigned int fclk; 168 unsigned int bps; 169 unsigned int extmodem; 170 unsigned int loopback; 171 } cfg; 172 173 struct hdlcdrv_channel_params ch_params; 174 175 struct { 176 unsigned int bitbuf, bitstream, numbits, state; 177 unsigned char *bufptr; 178 int bufcnt; 179 unsigned char buf[TXBUFFER_SIZE]; 180 } hdlcrx; 181 182 struct { 183 int calibrate; 184 int slotcnt; 185 int flags; 186 enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state; 187 unsigned char *bufptr; 188 int bufcnt; 189 unsigned char buf[TXBUFFER_SIZE]; 190 } hdlctx; 191 192 unsigned int ptt_keyed; 193 struct sk_buff *skb; /* next transmit packet */ 194 195 #ifdef BAYCOM_DEBUG 196 struct debug_vals { 197 unsigned long last_jiffies; 198 unsigned cur_intcnt; 199 unsigned last_intcnt; 200 int cur_pllcorr; 201 int last_pllcorr; 202 unsigned int mod_cycles; 203 unsigned int demod_cycles; 204 } debug_vals; 205 #endif /* BAYCOM_DEBUG */ 206 }; 207 208 /* --------------------------------------------------------------------- */ 209 210 #define KISS_VERBOSE 211 212 /* --------------------------------------------------------------------- */ 213 214 #define PARAM_TXDELAY 1 215 #define PARAM_PERSIST 2 216 #define PARAM_SLOTTIME 3 217 #define PARAM_TXTAIL 4 218 #define PARAM_FULLDUP 5 219 #define PARAM_HARDWARE 6 220 #define PARAM_RETURN 255 221 222 /* --------------------------------------------------------------------- */ 223 /* 224 * the CRC routines are stolen from WAMPES 225 * by Dieter Deyke 226 */ 227 228 229 /*---------------------------------------------------------------------------*/ 230 231 #if 0 232 static inline void append_crc_ccitt(unsigned char *buffer, int len) 233 { 234 unsigned int crc = 0xffff; 235 236 for (;len>0;len--) 237 crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff]; 238 crc ^= 0xffff; 239 *buffer++ = crc; 240 *buffer++ = crc >> 8; 241 } 242 #endif 243 244 /*---------------------------------------------------------------------------*/ 245 246 static inline int check_crc_ccitt(const unsigned char *buf, int cnt) 247 { 248 return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8; 249 } 250 251 /*---------------------------------------------------------------------------*/ 252 253 static inline int calc_crc_ccitt(const unsigned char *buf, int cnt) 254 { 255 return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff; 256 } 257 258 /* ---------------------------------------------------------------------- */ 259 260 #define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800) 261 262 /* --------------------------------------------------------------------- */ 263 264 static inline void baycom_int_freq(struct baycom_state *bc) 265 { 266 #ifdef BAYCOM_DEBUG 267 unsigned long cur_jiffies = jiffies; 268 /* 269 * measure the interrupt frequency 270 */ 271 bc->debug_vals.cur_intcnt++; 272 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { 273 bc->debug_vals.last_jiffies = cur_jiffies; 274 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; 275 bc->debug_vals.cur_intcnt = 0; 276 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; 277 bc->debug_vals.cur_pllcorr = 0; 278 } 279 #endif /* BAYCOM_DEBUG */ 280 } 281 282 /* ---------------------------------------------------------------------- */ 283 /* 284 * eppconfig_path should be setable via /proc/sys. 285 */ 286 287 static char const eppconfig_path[] = "/usr/sbin/eppfpga"; 288 289 static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL }; 290 291 /* eppconfig: called during ifconfig up to configure the modem */ 292 static int eppconfig(struct baycom_state *bc) 293 { 294 char modearg[256]; 295 char portarg[16]; 296 char *argv[] = { 297 (char *)eppconfig_path, 298 "-s", 299 "-p", portarg, 300 "-m", modearg, 301 NULL }; 302 303 /* set up arguments */ 304 sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat", 305 bc->cfg.intclk ? "int" : "ext", 306 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, 307 (bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps), 308 bc->cfg.loopback ? ",loopback" : ""); 309 sprintf(portarg, "%ld", bc->pdev->port->base); 310 printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg); 311 312 return call_usermodehelper(eppconfig_path, argv, envp, UMH_WAIT_PROC); 313 } 314 315 /* ---------------------------------------------------------------------- */ 316 317 static inline void do_kiss_params(struct baycom_state *bc, 318 unsigned char *data, unsigned long len) 319 { 320 321 #ifdef KISS_VERBOSE 322 #define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b) 323 #else /* KISS_VERBOSE */ 324 #define PKP(a,b) 325 #endif /* KISS_VERBOSE */ 326 327 if (len < 2) 328 return; 329 switch(data[0]) { 330 case PARAM_TXDELAY: 331 bc->ch_params.tx_delay = data[1]; 332 PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay); 333 break; 334 case PARAM_PERSIST: 335 bc->ch_params.ppersist = data[1]; 336 PKP("p persistence = %u", bc->ch_params.ppersist); 337 break; 338 case PARAM_SLOTTIME: 339 bc->ch_params.slottime = data[1]; 340 PKP("slot time = %ums", bc->ch_params.slottime); 341 break; 342 case PARAM_TXTAIL: 343 bc->ch_params.tx_tail = data[1]; 344 PKP("TX tail = %ums", bc->ch_params.tx_tail); 345 break; 346 case PARAM_FULLDUP: 347 bc->ch_params.fulldup = !!data[1]; 348 PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half"); 349 break; 350 default: 351 break; 352 } 353 #undef PKP 354 } 355 356 /* --------------------------------------------------------------------- */ 357 358 static void encode_hdlc(struct baycom_state *bc) 359 { 360 struct sk_buff *skb; 361 unsigned char *wp, *bp; 362 int pkt_len; 363 unsigned bitstream, notbitstream, bitbuf, numbit, crc; 364 unsigned char crcarr[2]; 365 int j; 366 367 if (bc->hdlctx.bufcnt > 0) 368 return; 369 skb = bc->skb; 370 if (!skb) 371 return; 372 bc->skb = NULL; 373 pkt_len = skb->len-1; /* strip KISS byte */ 374 wp = bc->hdlctx.buf; 375 bp = skb->data+1; 376 crc = calc_crc_ccitt(bp, pkt_len); 377 crcarr[0] = crc; 378 crcarr[1] = crc >> 8; 379 *wp++ = 0x7e; 380 bitstream = bitbuf = numbit = 0; 381 while (pkt_len > -2) { 382 bitstream >>= 8; 383 bitstream |= ((unsigned int)*bp) << 8; 384 bitbuf |= ((unsigned int)*bp) << numbit; 385 notbitstream = ~bitstream; 386 bp++; 387 pkt_len--; 388 if (!pkt_len) 389 bp = crcarr; 390 for (j = 0; j < 8; j++) 391 if (unlikely(!(notbitstream & (0x1f0 << j)))) { 392 bitstream &= ~(0x100 << j); 393 bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) | 394 ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1); 395 numbit++; 396 notbitstream = ~bitstream; 397 } 398 numbit += 8; 399 while (numbit >= 8) { 400 *wp++ = bitbuf; 401 bitbuf >>= 8; 402 numbit -= 8; 403 } 404 } 405 bitbuf |= 0x7e7e << numbit; 406 numbit += 16; 407 while (numbit >= 8) { 408 *wp++ = bitbuf; 409 bitbuf >>= 8; 410 numbit -= 8; 411 } 412 bc->hdlctx.bufptr = bc->hdlctx.buf; 413 bc->hdlctx.bufcnt = wp - bc->hdlctx.buf; 414 dev_kfree_skb(skb); 415 bc->dev->stats.tx_packets++; 416 } 417 418 /* ---------------------------------------------------------------------- */ 419 420 static int transmit(struct baycom_state *bc, int cnt, unsigned char stat) 421 { 422 struct parport *pp = bc->pdev->port; 423 unsigned char tmp[128]; 424 int i, j; 425 426 if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT)) 427 bc->hdlctx.state = tx_idle; 428 if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) { 429 if (bc->hdlctx.bufcnt <= 0) 430 encode_hdlc(bc); 431 if (bc->hdlctx.bufcnt <= 0) 432 return 0; 433 if (!bc->ch_params.fulldup) { 434 if (!(stat & EPP_DCDBIT)) { 435 bc->hdlctx.slotcnt = bc->ch_params.slottime; 436 return 0; 437 } 438 if ((--bc->hdlctx.slotcnt) > 0) 439 return 0; 440 bc->hdlctx.slotcnt = bc->ch_params.slottime; 441 if ((prandom_u32() % 256) > bc->ch_params.ppersist) 442 return 0; 443 } 444 } 445 if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) { 446 bc->hdlctx.state = tx_keyup; 447 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay); 448 bc->ptt_keyed++; 449 } 450 while (cnt > 0) { 451 switch (bc->hdlctx.state) { 452 case tx_keyup: 453 i = min_t(int, cnt, bc->hdlctx.flags); 454 cnt -= i; 455 bc->hdlctx.flags -= i; 456 if (bc->hdlctx.flags <= 0) 457 bc->hdlctx.state = tx_data; 458 memset(tmp, 0x7e, sizeof(tmp)); 459 while (i > 0) { 460 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 461 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 462 return -1; 463 i -= j; 464 } 465 break; 466 467 case tx_data: 468 if (bc->hdlctx.bufcnt <= 0) { 469 encode_hdlc(bc); 470 if (bc->hdlctx.bufcnt <= 0) { 471 bc->hdlctx.state = tx_tail; 472 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail); 473 break; 474 } 475 } 476 i = min_t(int, cnt, bc->hdlctx.bufcnt); 477 bc->hdlctx.bufcnt -= i; 478 cnt -= i; 479 if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0)) 480 return -1; 481 bc->hdlctx.bufptr += i; 482 break; 483 484 case tx_tail: 485 encode_hdlc(bc); 486 if (bc->hdlctx.bufcnt > 0) { 487 bc->hdlctx.state = tx_data; 488 break; 489 } 490 i = min_t(int, cnt, bc->hdlctx.flags); 491 if (i) { 492 cnt -= i; 493 bc->hdlctx.flags -= i; 494 memset(tmp, 0x7e, sizeof(tmp)); 495 while (i > 0) { 496 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 497 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 498 return -1; 499 i -= j; 500 } 501 break; 502 } 503 fallthrough; 504 505 default: 506 if (bc->hdlctx.calibrate <= 0) 507 return 0; 508 i = min_t(int, cnt, bc->hdlctx.calibrate); 509 cnt -= i; 510 bc->hdlctx.calibrate -= i; 511 memset(tmp, 0, sizeof(tmp)); 512 while (i > 0) { 513 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 514 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 515 return -1; 516 i -= j; 517 } 518 break; 519 } 520 } 521 return 0; 522 } 523 524 /* ---------------------------------------------------------------------- */ 525 526 static void do_rxpacket(struct net_device *dev) 527 { 528 struct baycom_state *bc = netdev_priv(dev); 529 struct sk_buff *skb; 530 unsigned char *cp; 531 unsigned pktlen; 532 533 if (bc->hdlcrx.bufcnt < 4) 534 return; 535 if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt)) 536 return; 537 pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */ 538 if (!(skb = dev_alloc_skb(pktlen))) { 539 printk("%s: memory squeeze, dropping packet\n", dev->name); 540 dev->stats.rx_dropped++; 541 return; 542 } 543 cp = skb_put(skb, pktlen); 544 *cp++ = 0; /* KISS kludge */ 545 memcpy(cp, bc->hdlcrx.buf, pktlen - 1); 546 skb->protocol = ax25_type_trans(skb, dev); 547 netif_rx(skb); 548 dev->stats.rx_packets++; 549 } 550 551 static int receive(struct net_device *dev, int cnt) 552 { 553 struct baycom_state *bc = netdev_priv(dev); 554 struct parport *pp = bc->pdev->port; 555 unsigned int bitbuf, notbitstream, bitstream, numbits, state; 556 unsigned char tmp[128]; 557 unsigned char *cp; 558 int cnt2, ret = 0; 559 int j; 560 561 numbits = bc->hdlcrx.numbits; 562 state = bc->hdlcrx.state; 563 bitstream = bc->hdlcrx.bitstream; 564 bitbuf = bc->hdlcrx.bitbuf; 565 while (cnt > 0) { 566 cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt; 567 cnt -= cnt2; 568 if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) { 569 ret = -1; 570 break; 571 } 572 cp = tmp; 573 for (; cnt2 > 0; cnt2--, cp++) { 574 bitstream >>= 8; 575 bitstream |= (*cp) << 8; 576 bitbuf >>= 8; 577 bitbuf |= (*cp) << 8; 578 numbits += 8; 579 notbitstream = ~bitstream; 580 for (j = 0; j < 8; j++) { 581 582 /* flag or abort */ 583 if (unlikely(!(notbitstream & (0x0fc << j)))) { 584 585 /* abort received */ 586 if (!(notbitstream & (0x1fc << j))) 587 state = 0; 588 589 /* flag received */ 590 else if ((bitstream & (0x1fe << j)) == (0x0fc << j)) { 591 if (state) 592 do_rxpacket(dev); 593 bc->hdlcrx.bufcnt = 0; 594 bc->hdlcrx.bufptr = bc->hdlcrx.buf; 595 state = 1; 596 numbits = 7-j; 597 } 598 } 599 600 /* stuffed bit */ 601 else if (unlikely((bitstream & (0x1f8 << j)) == (0xf8 << j))) { 602 numbits--; 603 bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1); 604 } 605 } 606 while (state && numbits >= 8) { 607 if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) { 608 state = 0; 609 } else { 610 *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits); 611 bc->hdlcrx.bufcnt++; 612 numbits -= 8; 613 } 614 } 615 } 616 } 617 bc->hdlcrx.numbits = numbits; 618 bc->hdlcrx.state = state; 619 bc->hdlcrx.bitstream = bitstream; 620 bc->hdlcrx.bitbuf = bitbuf; 621 return ret; 622 } 623 624 /* --------------------------------------------------------------------- */ 625 626 #ifdef __i386__ 627 #include <asm/msr.h> 628 #define GETTICK(x) \ 629 ({ \ 630 if (boot_cpu_has(X86_FEATURE_TSC)) \ 631 x = (unsigned int)rdtsc(); \ 632 }) 633 #else /* __i386__ */ 634 #define GETTICK(x) 635 #endif /* __i386__ */ 636 637 static void epp_bh(struct work_struct *work) 638 { 639 struct net_device *dev; 640 struct baycom_state *bc; 641 struct parport *pp; 642 unsigned char stat; 643 unsigned char tmp[2]; 644 unsigned int time1 = 0, time2 = 0, time3 = 0; 645 int cnt, cnt2; 646 647 bc = container_of(work, struct baycom_state, run_work.work); 648 dev = bc->dev; 649 if (!bc->work_running) 650 return; 651 baycom_int_freq(bc); 652 pp = bc->pdev->port; 653 /* update status */ 654 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 655 goto epptimeout; 656 bc->stat = stat; 657 bc->debug_vals.last_pllcorr = stat; 658 GETTICK(time1); 659 if (bc->modem == EPP_FPGAEXTSTATUS) { 660 /* get input count */ 661 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1; 662 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 663 goto epptimeout; 664 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2) 665 goto epptimeout; 666 cnt = tmp[0] | (tmp[1] << 8); 667 cnt &= 0x7fff; 668 /* get output count */ 669 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2; 670 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 671 goto epptimeout; 672 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2) 673 goto epptimeout; 674 cnt2 = tmp[0] | (tmp[1] << 8); 675 cnt2 = 16384 - (cnt2 & 0x7fff); 676 /* return to normal */ 677 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE; 678 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 679 goto epptimeout; 680 if (transmit(bc, cnt2, stat)) 681 goto epptimeout; 682 GETTICK(time2); 683 if (receive(dev, cnt)) 684 goto epptimeout; 685 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 686 goto epptimeout; 687 bc->stat = stat; 688 } else { 689 /* try to tx */ 690 switch (stat & (EPP_NTAEF|EPP_NTHF)) { 691 case EPP_NTHF: 692 cnt = 2048 - 256; 693 break; 694 695 case EPP_NTAEF: 696 cnt = 2048 - 1793; 697 break; 698 699 case 0: 700 cnt = 0; 701 break; 702 703 default: 704 cnt = 2048 - 1025; 705 break; 706 } 707 if (transmit(bc, cnt, stat)) 708 goto epptimeout; 709 GETTICK(time2); 710 /* do receiver */ 711 while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) { 712 switch (stat & (EPP_NRAEF|EPP_NRHF)) { 713 case EPP_NRAEF: 714 cnt = 1025; 715 break; 716 717 case 0: 718 cnt = 1793; 719 break; 720 721 default: 722 cnt = 256; 723 break; 724 } 725 if (receive(dev, cnt)) 726 goto epptimeout; 727 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 728 goto epptimeout; 729 } 730 cnt = 0; 731 if (bc->bitrate < 50000) 732 cnt = 256; 733 else if (bc->bitrate < 100000) 734 cnt = 128; 735 while (cnt > 0 && stat & EPP_NREF) { 736 if (receive(dev, 1)) 737 goto epptimeout; 738 cnt--; 739 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 740 goto epptimeout; 741 } 742 } 743 GETTICK(time3); 744 #ifdef BAYCOM_DEBUG 745 bc->debug_vals.mod_cycles = time2 - time1; 746 bc->debug_vals.demod_cycles = time3 - time2; 747 #endif /* BAYCOM_DEBUG */ 748 schedule_delayed_work(&bc->run_work, 1); 749 if (!bc->skb) 750 netif_wake_queue(dev); 751 return; 752 epptimeout: 753 printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname); 754 } 755 756 /* ---------------------------------------------------------------------- */ 757 /* 758 * ===================== network driver interface ========================= 759 */ 760 761 static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev) 762 { 763 struct baycom_state *bc = netdev_priv(dev); 764 765 if (skb->protocol == htons(ETH_P_IP)) 766 return ax25_ip_xmit(skb); 767 768 if (skb->data[0] != 0) { 769 do_kiss_params(bc, skb->data, skb->len); 770 dev_kfree_skb(skb); 771 return NETDEV_TX_OK; 772 } 773 if (bc->skb) { 774 dev_kfree_skb(skb); 775 return NETDEV_TX_OK; 776 } 777 /* strip KISS byte */ 778 if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) { 779 dev_kfree_skb(skb); 780 return NETDEV_TX_OK; 781 } 782 netif_stop_queue(dev); 783 bc->skb = skb; 784 return NETDEV_TX_OK; 785 } 786 787 /* --------------------------------------------------------------------- */ 788 789 static int baycom_set_mac_address(struct net_device *dev, void *addr) 790 { 791 struct sockaddr *sa = (struct sockaddr *)addr; 792 793 /* addr is an AX.25 shifted ASCII mac address */ 794 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); 795 return 0; 796 } 797 798 /* --------------------------------------------------------------------- */ 799 800 static void epp_wakeup(void *handle) 801 { 802 struct net_device *dev = (struct net_device *)handle; 803 struct baycom_state *bc = netdev_priv(dev); 804 805 printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name); 806 if (!parport_claim(bc->pdev)) 807 printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name); 808 } 809 810 /* --------------------------------------------------------------------- */ 811 812 /* 813 * Open/initialize the board. This is called (in the current kernel) 814 * sometime after booting when the 'ifconfig' program is run. 815 * 816 * This routine should set everything up anew at each open, even 817 * registers that "should" only need to be set once at boot, so that 818 * there is non-reboot way to recover if something goes wrong. 819 */ 820 821 static int epp_open(struct net_device *dev) 822 { 823 struct baycom_state *bc = netdev_priv(dev); 824 struct parport *pp = parport_find_base(dev->base_addr); 825 unsigned int i, j; 826 unsigned char tmp[128]; 827 unsigned char stat; 828 unsigned long tstart; 829 struct pardev_cb par_cb; 830 831 if (!pp) { 832 printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr); 833 return -ENXIO; 834 } 835 #if 0 836 if (pp->irq < 0) { 837 printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base); 838 parport_put_port(pp); 839 return -ENXIO; 840 } 841 #endif 842 if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) { 843 printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n", 844 bc_drvname, pp->base); 845 parport_put_port(pp); 846 return -EIO; 847 } 848 memset(&bc->modem, 0, sizeof(bc->modem)); 849 memset(&par_cb, 0, sizeof(par_cb)); 850 par_cb.wakeup = epp_wakeup; 851 par_cb.private = (void *)dev; 852 par_cb.flags = PARPORT_DEV_EXCL; 853 for (i = 0; i < NR_PORTS; i++) 854 if (baycom_device[i] == dev) 855 break; 856 857 if (i == NR_PORTS) { 858 pr_err("%s: no device found\n", bc_drvname); 859 parport_put_port(pp); 860 return -ENODEV; 861 } 862 863 bc->pdev = parport_register_dev_model(pp, dev->name, &par_cb, i); 864 parport_put_port(pp); 865 if (!bc->pdev) { 866 printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base); 867 return -ENXIO; 868 } 869 if (parport_claim(bc->pdev)) { 870 printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base); 871 parport_unregister_device(bc->pdev); 872 return -EBUSY; 873 } 874 dev->irq = /*pp->irq*/ 0; 875 INIT_DELAYED_WORK(&bc->run_work, epp_bh); 876 bc->work_running = 1; 877 bc->modem = EPP_CONVENTIONAL; 878 if (eppconfig(bc)) 879 printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname); 880 else 881 bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS; 882 parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */ 883 /* reset the modem */ 884 tmp[0] = 0; 885 tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE; 886 if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2) 887 goto epptimeout; 888 /* autoprobe baud rate */ 889 tstart = jiffies; 890 i = 0; 891 while (time_before(jiffies, tstart + HZ/3)) { 892 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 893 goto epptimeout; 894 if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) { 895 schedule(); 896 continue; 897 } 898 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128) 899 goto epptimeout; 900 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128) 901 goto epptimeout; 902 i += 256; 903 } 904 for (j = 0; j < 256; j++) { 905 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 906 goto epptimeout; 907 if (!(stat & EPP_NREF)) 908 break; 909 if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1) 910 goto epptimeout; 911 i++; 912 } 913 tstart = jiffies - tstart; 914 bc->bitrate = i * (8 * HZ) / tstart; 915 j = 1; 916 i = bc->bitrate >> 3; 917 while (j < 7 && i > 150) { 918 j++; 919 i >>= 1; 920 } 921 printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n", 922 bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2)); 923 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/; 924 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 925 goto epptimeout; 926 /* 927 * initialise hdlc variables 928 */ 929 bc->hdlcrx.state = 0; 930 bc->hdlcrx.numbits = 0; 931 bc->hdlctx.state = tx_idle; 932 bc->hdlctx.bufcnt = 0; 933 bc->hdlctx.slotcnt = bc->ch_params.slottime; 934 bc->hdlctx.calibrate = 0; 935 /* start the bottom half stuff */ 936 schedule_delayed_work(&bc->run_work, 1); 937 netif_start_queue(dev); 938 return 0; 939 940 epptimeout: 941 printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname); 942 parport_write_control(pp, 0); /* reset the adapter */ 943 parport_release(bc->pdev); 944 parport_unregister_device(bc->pdev); 945 return -EIO; 946 } 947 948 /* --------------------------------------------------------------------- */ 949 950 static int epp_close(struct net_device *dev) 951 { 952 struct baycom_state *bc = netdev_priv(dev); 953 struct parport *pp = bc->pdev->port; 954 unsigned char tmp[1]; 955 956 bc->work_running = 0; 957 cancel_delayed_work_sync(&bc->run_work); 958 bc->stat = EPP_DCDBIT; 959 tmp[0] = 0; 960 pp->ops->epp_write_addr(pp, tmp, 1, 0); 961 parport_write_control(pp, 0); /* reset the adapter */ 962 parport_release(bc->pdev); 963 parport_unregister_device(bc->pdev); 964 dev_kfree_skb(bc->skb); 965 bc->skb = NULL; 966 printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n", 967 bc_drvname, dev->base_addr, dev->irq); 968 return 0; 969 } 970 971 /* --------------------------------------------------------------------- */ 972 973 static int baycom_setmode(struct baycom_state *bc, const char *modestr) 974 { 975 const char *cp; 976 977 if (strstr(modestr,"intclk")) 978 bc->cfg.intclk = 1; 979 if (strstr(modestr,"extclk")) 980 bc->cfg.intclk = 0; 981 if (strstr(modestr,"intmodem")) 982 bc->cfg.extmodem = 0; 983 if (strstr(modestr,"extmodem")) 984 bc->cfg.extmodem = 1; 985 if (strstr(modestr,"noloopback")) 986 bc->cfg.loopback = 0; 987 if (strstr(modestr,"loopback")) 988 bc->cfg.loopback = 1; 989 if ((cp = strstr(modestr,"fclk="))) { 990 bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0); 991 if (bc->cfg.fclk < 1000000) 992 bc->cfg.fclk = 1000000; 993 if (bc->cfg.fclk > 25000000) 994 bc->cfg.fclk = 25000000; 995 } 996 if ((cp = strstr(modestr,"bps="))) { 997 bc->cfg.bps = simple_strtoul(cp+4, NULL, 0); 998 if (bc->cfg.bps < 1000) 999 bc->cfg.bps = 1000; 1000 if (bc->cfg.bps > 1500000) 1001 bc->cfg.bps = 1500000; 1002 } 1003 return 0; 1004 } 1005 1006 /* --------------------------------------------------------------------- */ 1007 1008 static int baycom_siocdevprivate(struct net_device *dev, struct ifreq *ifr, 1009 void __user *data, int cmd) 1010 { 1011 struct baycom_state *bc = netdev_priv(dev); 1012 struct hdlcdrv_ioctl hi; 1013 1014 if (cmd != SIOCDEVPRIVATE) 1015 return -ENOIOCTLCMD; 1016 1017 if (copy_from_user(&hi, data, sizeof(hi))) 1018 return -EFAULT; 1019 switch (hi.cmd) { 1020 default: 1021 return -ENOIOCTLCMD; 1022 1023 case HDLCDRVCTL_GETCHANNELPAR: 1024 hi.data.cp.tx_delay = bc->ch_params.tx_delay; 1025 hi.data.cp.tx_tail = bc->ch_params.tx_tail; 1026 hi.data.cp.slottime = bc->ch_params.slottime; 1027 hi.data.cp.ppersist = bc->ch_params.ppersist; 1028 hi.data.cp.fulldup = bc->ch_params.fulldup; 1029 break; 1030 1031 case HDLCDRVCTL_SETCHANNELPAR: 1032 if (!capable(CAP_NET_ADMIN)) 1033 return -EACCES; 1034 bc->ch_params.tx_delay = hi.data.cp.tx_delay; 1035 bc->ch_params.tx_tail = hi.data.cp.tx_tail; 1036 bc->ch_params.slottime = hi.data.cp.slottime; 1037 bc->ch_params.ppersist = hi.data.cp.ppersist; 1038 bc->ch_params.fulldup = hi.data.cp.fulldup; 1039 bc->hdlctx.slotcnt = 1; 1040 return 0; 1041 1042 case HDLCDRVCTL_GETMODEMPAR: 1043 hi.data.mp.iobase = dev->base_addr; 1044 hi.data.mp.irq = dev->irq; 1045 hi.data.mp.dma = dev->dma; 1046 hi.data.mp.dma2 = 0; 1047 hi.data.mp.seriobase = 0; 1048 hi.data.mp.pariobase = 0; 1049 hi.data.mp.midiiobase = 0; 1050 break; 1051 1052 case HDLCDRVCTL_SETMODEMPAR: 1053 if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev)) 1054 return -EACCES; 1055 dev->base_addr = hi.data.mp.iobase; 1056 dev->irq = /*hi.data.mp.irq*/0; 1057 dev->dma = /*hi.data.mp.dma*/0; 1058 return 0; 1059 1060 case HDLCDRVCTL_GETSTAT: 1061 hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT); 1062 hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT); 1063 hi.data.cs.ptt_keyed = bc->ptt_keyed; 1064 hi.data.cs.tx_packets = dev->stats.tx_packets; 1065 hi.data.cs.tx_errors = dev->stats.tx_errors; 1066 hi.data.cs.rx_packets = dev->stats.rx_packets; 1067 hi.data.cs.rx_errors = dev->stats.rx_errors; 1068 break; 1069 1070 case HDLCDRVCTL_OLDGETSTAT: 1071 hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT); 1072 hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT); 1073 hi.data.ocs.ptt_keyed = bc->ptt_keyed; 1074 break; 1075 1076 case HDLCDRVCTL_CALIBRATE: 1077 if (!capable(CAP_SYS_RAWIO)) 1078 return -EACCES; 1079 bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8; 1080 return 0; 1081 1082 case HDLCDRVCTL_DRIVERNAME: 1083 strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername)); 1084 break; 1085 1086 case HDLCDRVCTL_GETMODE: 1087 sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s", 1088 bc->cfg.intclk ? "int" : "ext", 1089 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, 1090 bc->cfg.loopback ? ",loopback" : ""); 1091 break; 1092 1093 case HDLCDRVCTL_SETMODE: 1094 if (!capable(CAP_NET_ADMIN) || netif_running(dev)) 1095 return -EACCES; 1096 hi.data.modename[sizeof(hi.data.modename)-1] = '\0'; 1097 return baycom_setmode(bc, hi.data.modename); 1098 1099 case HDLCDRVCTL_MODELIST: 1100 strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x", 1101 sizeof(hi.data.modename)); 1102 break; 1103 1104 case HDLCDRVCTL_MODEMPARMASK: 1105 return HDLCDRV_PARMASK_IOBASE; 1106 1107 } 1108 if (copy_to_user(data, &hi, sizeof(hi))) 1109 return -EFAULT; 1110 return 0; 1111 } 1112 1113 /* --------------------------------------------------------------------- */ 1114 1115 static const struct net_device_ops baycom_netdev_ops = { 1116 .ndo_open = epp_open, 1117 .ndo_stop = epp_close, 1118 .ndo_siocdevprivate = baycom_siocdevprivate, 1119 .ndo_start_xmit = baycom_send_packet, 1120 .ndo_set_mac_address = baycom_set_mac_address, 1121 }; 1122 1123 /* 1124 * Check for a network adaptor of this type, and return '0' if one exists. 1125 * If dev->base_addr == 0, probe all likely locations. 1126 * If dev->base_addr == 1, always return failure. 1127 * If dev->base_addr == 2, allocate space for the device and return success 1128 * (detachable devices only). 1129 */ 1130 static void baycom_probe(struct net_device *dev) 1131 { 1132 const struct hdlcdrv_channel_params dflt_ch_params = { 1133 20, 2, 10, 40, 0 1134 }; 1135 struct baycom_state *bc; 1136 1137 /* 1138 * not a real probe! only initialize data structures 1139 */ 1140 bc = netdev_priv(dev); 1141 /* 1142 * initialize the baycom_state struct 1143 */ 1144 bc->ch_params = dflt_ch_params; 1145 bc->ptt_keyed = 0; 1146 1147 /* 1148 * initialize the device struct 1149 */ 1150 1151 /* Fill in the fields of the device structure */ 1152 bc->skb = NULL; 1153 1154 dev->netdev_ops = &baycom_netdev_ops; 1155 dev->header_ops = &ax25_header_ops; 1156 1157 dev->type = ARPHRD_AX25; /* AF_AX25 device */ 1158 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN; 1159 dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */ 1160 dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */ 1161 memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN); 1162 memcpy(dev->dev_addr, &null_ax25_address, AX25_ADDR_LEN); 1163 dev->tx_queue_len = 16; 1164 1165 /* New style flags */ 1166 dev->flags = 0; 1167 } 1168 1169 /* --------------------------------------------------------------------- */ 1170 1171 /* 1172 * command line settable parameters 1173 */ 1174 static char *mode[NR_PORTS] = { "", }; 1175 static int iobase[NR_PORTS] = { 0x378, }; 1176 1177 module_param_array(mode, charp, NULL, 0); 1178 MODULE_PARM_DESC(mode, "baycom operating mode"); 1179 module_param_hw_array(iobase, int, ioport, NULL, 0); 1180 MODULE_PARM_DESC(iobase, "baycom io base address"); 1181 1182 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); 1183 MODULE_DESCRIPTION("Baycom epp amateur radio modem driver"); 1184 MODULE_LICENSE("GPL"); 1185 1186 /* --------------------------------------------------------------------- */ 1187 1188 static int baycom_epp_par_probe(struct pardevice *par_dev) 1189 { 1190 struct device_driver *drv = par_dev->dev.driver; 1191 int len = strlen(drv->name); 1192 1193 if (strncmp(par_dev->name, drv->name, len)) 1194 return -ENODEV; 1195 1196 return 0; 1197 } 1198 1199 static struct parport_driver baycom_epp_par_driver = { 1200 .name = "bce", 1201 .probe = baycom_epp_par_probe, 1202 .devmodel = true, 1203 }; 1204 1205 static void __init baycom_epp_dev_setup(struct net_device *dev) 1206 { 1207 struct baycom_state *bc = netdev_priv(dev); 1208 1209 /* 1210 * initialize part of the baycom_state struct 1211 */ 1212 bc->dev = dev; 1213 bc->magic = BAYCOM_MAGIC; 1214 bc->cfg.fclk = 19666600; 1215 bc->cfg.bps = 9600; 1216 /* 1217 * initialize part of the device struct 1218 */ 1219 baycom_probe(dev); 1220 } 1221 1222 static int __init init_baycomepp(void) 1223 { 1224 int i, found = 0, ret; 1225 char set_hw = 1; 1226 1227 printk(bc_drvinfo); 1228 1229 ret = parport_register_driver(&baycom_epp_par_driver); 1230 if (ret) 1231 return ret; 1232 1233 /* 1234 * register net devices 1235 */ 1236 for (i = 0; i < NR_PORTS; i++) { 1237 struct net_device *dev; 1238 1239 dev = alloc_netdev(sizeof(struct baycom_state), "bce%d", 1240 NET_NAME_UNKNOWN, baycom_epp_dev_setup); 1241 1242 if (!dev) { 1243 printk(KERN_WARNING "bce%d : out of memory\n", i); 1244 return found ? 0 : -ENOMEM; 1245 } 1246 1247 sprintf(dev->name, "bce%d", i); 1248 dev->base_addr = iobase[i]; 1249 1250 if (!mode[i]) 1251 set_hw = 0; 1252 if (!set_hw) 1253 iobase[i] = 0; 1254 1255 if (register_netdev(dev)) { 1256 printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name); 1257 free_netdev(dev); 1258 break; 1259 } 1260 if (set_hw && baycom_setmode(netdev_priv(dev), mode[i])) 1261 set_hw = 0; 1262 baycom_device[i] = dev; 1263 found++; 1264 } 1265 1266 if (found == 0) { 1267 parport_unregister_driver(&baycom_epp_par_driver); 1268 return -ENXIO; 1269 } 1270 1271 return 0; 1272 } 1273 1274 static void __exit cleanup_baycomepp(void) 1275 { 1276 int i; 1277 1278 for(i = 0; i < NR_PORTS; i++) { 1279 struct net_device *dev = baycom_device[i]; 1280 1281 if (dev) { 1282 struct baycom_state *bc = netdev_priv(dev); 1283 if (bc->magic == BAYCOM_MAGIC) { 1284 unregister_netdev(dev); 1285 free_netdev(dev); 1286 } else 1287 printk(paranoia_str, "cleanup_module"); 1288 } 1289 } 1290 parport_unregister_driver(&baycom_epp_par_driver); 1291 } 1292 1293 module_init(init_baycomepp); 1294 module_exit(cleanup_baycomepp); 1295 1296 /* --------------------------------------------------------------------- */ 1297 1298 #ifndef MODULE 1299 1300 /* 1301 * format: baycom_epp=io,mode 1302 * mode: fpga config options 1303 */ 1304 1305 static int __init baycom_epp_setup(char *str) 1306 { 1307 static unsigned __initdata nr_dev = 0; 1308 int ints[2]; 1309 1310 if (nr_dev >= NR_PORTS) 1311 return 0; 1312 str = get_options(str, 2, ints); 1313 if (ints[0] < 1) 1314 return 0; 1315 mode[nr_dev] = str; 1316 iobase[nr_dev] = ints[1]; 1317 nr_dev++; 1318 return 1; 1319 } 1320 1321 __setup("baycom_epp=", baycom_epp_setup); 1322 1323 #endif /* MODULE */ 1324 /* --------------------------------------------------------------------- */ 1325