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/config.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/smp_lock.h> 52 #include <asm/uaccess.h> 53 #include <linux/if_arp.h> 54 #include <linux/kmod.h> 55 #include <linux/hdlcdrv.h> 56 #include <linux/baycom.h> 57 #include <linux/jiffies.h> 58 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) 59 /* prototypes for ax25_encapsulate and ax25_rebuild_header */ 60 #include <net/ax25.h> 61 #endif /* CONFIG_AX25 || CONFIG_AX25_MODULE */ 62 #include <linux/crc-ccitt.h> 63 64 /* --------------------------------------------------------------------- */ 65 66 #define BAYCOM_DEBUG 67 #define BAYCOM_MAGIC 19730510 68 69 /* --------------------------------------------------------------------- */ 70 71 static const char paranoia_str[] = KERN_ERR 72 "baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n"; 73 74 static const char bc_drvname[] = "baycom_epp"; 75 static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n" 76 KERN_INFO "baycom_epp: version 0.7 compiled " __TIME__ " " __DATE__ "\n"; 77 78 /* --------------------------------------------------------------------- */ 79 80 #define NR_PORTS 4 81 82 static struct net_device *baycom_device[NR_PORTS]; 83 84 /* --------------------------------------------------------------------- */ 85 86 /* EPP status register */ 87 #define EPP_DCDBIT 0x80 88 #define EPP_PTTBIT 0x08 89 #define EPP_NREF 0x01 90 #define EPP_NRAEF 0x02 91 #define EPP_NRHF 0x04 92 #define EPP_NTHF 0x20 93 #define EPP_NTAEF 0x10 94 #define EPP_NTEF EPP_PTTBIT 95 96 /* EPP control register */ 97 #define EPP_TX_FIFO_ENABLE 0x10 98 #define EPP_RX_FIFO_ENABLE 0x08 99 #define EPP_MODEM_ENABLE 0x20 100 #define EPP_LEDS 0xC0 101 #define EPP_IRQ_ENABLE 0x10 102 103 /* LPT registers */ 104 #define LPTREG_ECONTROL 0x402 105 #define LPTREG_CONFIGB 0x401 106 #define LPTREG_CONFIGA 0x400 107 #define LPTREG_EPPDATA 0x004 108 #define LPTREG_EPPADDR 0x003 109 #define LPTREG_CONTROL 0x002 110 #define LPTREG_STATUS 0x001 111 #define LPTREG_DATA 0x000 112 113 /* LPT control register */ 114 #define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */ 115 #define LPTCTRL_WRITE 0x01 116 #define LPTCTRL_ADDRSTB 0x08 117 #define LPTCTRL_DATASTB 0x02 118 #define LPTCTRL_INTEN 0x10 119 120 /* LPT status register */ 121 #define LPTSTAT_SHIFT_NINTR 6 122 #define LPTSTAT_WAIT 0x80 123 #define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR) 124 #define LPTSTAT_PE 0x20 125 #define LPTSTAT_DONE 0x10 126 #define LPTSTAT_NERROR 0x08 127 #define LPTSTAT_EPPTIMEOUT 0x01 128 129 /* LPT data register */ 130 #define LPTDATA_SHIFT_TDI 0 131 #define LPTDATA_SHIFT_TMS 2 132 #define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI) 133 #define LPTDATA_TCK 0x02 134 #define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS) 135 #define LPTDATA_INITBIAS 0x80 136 137 138 /* EPP modem config/status bits */ 139 #define EPP_DCDBIT 0x80 140 #define EPP_PTTBIT 0x08 141 #define EPP_RXEBIT 0x01 142 #define EPP_RXAEBIT 0x02 143 #define EPP_RXHFULL 0x04 144 145 #define EPP_NTHF 0x20 146 #define EPP_NTAEF 0x10 147 #define EPP_NTEF EPP_PTTBIT 148 149 #define EPP_TX_FIFO_ENABLE 0x10 150 #define EPP_RX_FIFO_ENABLE 0x08 151 #define EPP_MODEM_ENABLE 0x20 152 #define EPP_LEDS 0xC0 153 #define EPP_IRQ_ENABLE 0x10 154 155 /* Xilinx 4k JTAG instructions */ 156 #define XC4K_IRLENGTH 3 157 #define XC4K_EXTEST 0 158 #define XC4K_PRELOAD 1 159 #define XC4K_CONFIGURE 5 160 #define XC4K_BYPASS 7 161 162 #define EPP_CONVENTIONAL 0 163 #define EPP_FPGA 1 164 #define EPP_FPGAEXTSTATUS 2 165 166 #define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8) 167 168 /* ---------------------------------------------------------------------- */ 169 /* 170 * Information that need to be kept for each board. 171 */ 172 173 struct baycom_state { 174 int magic; 175 176 struct pardevice *pdev; 177 unsigned int work_running; 178 struct work_struct run_work; 179 unsigned int modem; 180 unsigned int bitrate; 181 unsigned char stat; 182 183 struct { 184 unsigned int intclk; 185 unsigned int fclk; 186 unsigned int bps; 187 unsigned int extmodem; 188 unsigned int loopback; 189 } cfg; 190 191 struct hdlcdrv_channel_params ch_params; 192 193 struct { 194 unsigned int bitbuf, bitstream, numbits, state; 195 unsigned char *bufptr; 196 int bufcnt; 197 unsigned char buf[TXBUFFER_SIZE]; 198 } hdlcrx; 199 200 struct { 201 int calibrate; 202 int slotcnt; 203 int flags; 204 enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state; 205 unsigned char *bufptr; 206 int bufcnt; 207 unsigned char buf[TXBUFFER_SIZE]; 208 } hdlctx; 209 210 struct net_device_stats stats; 211 unsigned int ptt_keyed; 212 struct sk_buff *skb; /* next transmit packet */ 213 214 #ifdef BAYCOM_DEBUG 215 struct debug_vals { 216 unsigned long last_jiffies; 217 unsigned cur_intcnt; 218 unsigned last_intcnt; 219 int cur_pllcorr; 220 int last_pllcorr; 221 unsigned int mod_cycles; 222 unsigned int demod_cycles; 223 } debug_vals; 224 #endif /* BAYCOM_DEBUG */ 225 }; 226 227 /* --------------------------------------------------------------------- */ 228 229 #define KISS_VERBOSE 230 231 /* --------------------------------------------------------------------- */ 232 233 #define PARAM_TXDELAY 1 234 #define PARAM_PERSIST 2 235 #define PARAM_SLOTTIME 3 236 #define PARAM_TXTAIL 4 237 #define PARAM_FULLDUP 5 238 #define PARAM_HARDWARE 6 239 #define PARAM_RETURN 255 240 241 /* --------------------------------------------------------------------- */ 242 /* 243 * the CRC routines are stolen from WAMPES 244 * by Dieter Deyke 245 */ 246 247 248 /*---------------------------------------------------------------------------*/ 249 250 #if 0 251 static inline void append_crc_ccitt(unsigned char *buffer, int len) 252 { 253 unsigned int crc = 0xffff; 254 255 for (;len>0;len--) 256 crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff]; 257 crc ^= 0xffff; 258 *buffer++ = crc; 259 *buffer++ = crc >> 8; 260 } 261 #endif 262 263 /*---------------------------------------------------------------------------*/ 264 265 static inline int check_crc_ccitt(const unsigned char *buf, int cnt) 266 { 267 return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8; 268 } 269 270 /*---------------------------------------------------------------------------*/ 271 272 static inline int calc_crc_ccitt(const unsigned char *buf, int cnt) 273 { 274 return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff; 275 } 276 277 /* ---------------------------------------------------------------------- */ 278 279 #define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800) 280 281 /* --------------------------------------------------------------------- */ 282 283 static inline void baycom_int_freq(struct baycom_state *bc) 284 { 285 #ifdef BAYCOM_DEBUG 286 unsigned long cur_jiffies = jiffies; 287 /* 288 * measure the interrupt frequency 289 */ 290 bc->debug_vals.cur_intcnt++; 291 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { 292 bc->debug_vals.last_jiffies = cur_jiffies; 293 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; 294 bc->debug_vals.cur_intcnt = 0; 295 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; 296 bc->debug_vals.cur_pllcorr = 0; 297 } 298 #endif /* BAYCOM_DEBUG */ 299 } 300 301 /* ---------------------------------------------------------------------- */ 302 /* 303 * eppconfig_path should be setable via /proc/sys. 304 */ 305 306 static char eppconfig_path[256] = "/usr/sbin/eppfpga"; 307 308 static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL }; 309 310 /* eppconfig: called during ifconfig up to configure the modem */ 311 static int eppconfig(struct baycom_state *bc) 312 { 313 char modearg[256]; 314 char portarg[16]; 315 char *argv[] = { eppconfig_path, "-s", "-p", portarg, "-m", modearg, 316 NULL }; 317 318 /* set up arguments */ 319 sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat", 320 bc->cfg.intclk ? "int" : "ext", 321 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, 322 (bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps), 323 bc->cfg.loopback ? ",loopback" : ""); 324 sprintf(portarg, "%ld", bc->pdev->port->base); 325 printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg); 326 327 return call_usermodehelper(eppconfig_path, argv, envp, 1); 328 } 329 330 /* ---------------------------------------------------------------------- */ 331 332 static void epp_interrupt(int irq, void *dev_id, struct pt_regs *regs) 333 { 334 } 335 336 /* ---------------------------------------------------------------------- */ 337 338 static inline void do_kiss_params(struct baycom_state *bc, 339 unsigned char *data, unsigned long len) 340 { 341 342 #ifdef KISS_VERBOSE 343 #define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b) 344 #else /* KISS_VERBOSE */ 345 #define PKP(a,b) 346 #endif /* KISS_VERBOSE */ 347 348 if (len < 2) 349 return; 350 switch(data[0]) { 351 case PARAM_TXDELAY: 352 bc->ch_params.tx_delay = data[1]; 353 PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay); 354 break; 355 case PARAM_PERSIST: 356 bc->ch_params.ppersist = data[1]; 357 PKP("p persistence = %u", bc->ch_params.ppersist); 358 break; 359 case PARAM_SLOTTIME: 360 bc->ch_params.slottime = data[1]; 361 PKP("slot time = %ums", bc->ch_params.slottime); 362 break; 363 case PARAM_TXTAIL: 364 bc->ch_params.tx_tail = data[1]; 365 PKP("TX tail = %ums", bc->ch_params.tx_tail); 366 break; 367 case PARAM_FULLDUP: 368 bc->ch_params.fulldup = !!data[1]; 369 PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half"); 370 break; 371 default: 372 break; 373 } 374 #undef PKP 375 } 376 377 /* --------------------------------------------------------------------- */ 378 379 static void encode_hdlc(struct baycom_state *bc) 380 { 381 struct sk_buff *skb; 382 unsigned char *wp, *bp; 383 int pkt_len; 384 unsigned bitstream, notbitstream, bitbuf, numbit, crc; 385 unsigned char crcarr[2]; 386 int j; 387 388 if (bc->hdlctx.bufcnt > 0) 389 return; 390 skb = bc->skb; 391 if (!skb) 392 return; 393 bc->skb = NULL; 394 pkt_len = skb->len-1; /* strip KISS byte */ 395 wp = bc->hdlctx.buf; 396 bp = skb->data+1; 397 crc = calc_crc_ccitt(bp, pkt_len); 398 crcarr[0] = crc; 399 crcarr[1] = crc >> 8; 400 *wp++ = 0x7e; 401 bitstream = bitbuf = numbit = 0; 402 while (pkt_len > -2) { 403 bitstream >>= 8; 404 bitstream |= ((unsigned int)*bp) << 8; 405 bitbuf |= ((unsigned int)*bp) << numbit; 406 notbitstream = ~bitstream; 407 bp++; 408 pkt_len--; 409 if (!pkt_len) 410 bp = crcarr; 411 for (j = 0; j < 8; j++) 412 if (unlikely(!(notbitstream & (0x1f0 << j)))) { 413 bitstream &= ~(0x100 << j); 414 bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) | 415 ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1); 416 numbit++; 417 notbitstream = ~bitstream; 418 } 419 numbit += 8; 420 while (numbit >= 8) { 421 *wp++ = bitbuf; 422 bitbuf >>= 8; 423 numbit -= 8; 424 } 425 } 426 bitbuf |= 0x7e7e << numbit; 427 numbit += 16; 428 while (numbit >= 8) { 429 *wp++ = bitbuf; 430 bitbuf >>= 8; 431 numbit -= 8; 432 } 433 bc->hdlctx.bufptr = bc->hdlctx.buf; 434 bc->hdlctx.bufcnt = wp - bc->hdlctx.buf; 435 dev_kfree_skb(skb); 436 bc->stats.tx_packets++; 437 } 438 439 /* ---------------------------------------------------------------------- */ 440 441 static unsigned short random_seed; 442 443 static inline unsigned short random_num(void) 444 { 445 random_seed = 28629 * random_seed + 157; 446 return random_seed; 447 } 448 449 /* ---------------------------------------------------------------------- */ 450 451 static int transmit(struct baycom_state *bc, int cnt, unsigned char stat) 452 { 453 struct parport *pp = bc->pdev->port; 454 unsigned char tmp[128]; 455 int i, j; 456 457 if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT)) 458 bc->hdlctx.state = tx_idle; 459 if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) { 460 if (bc->hdlctx.bufcnt <= 0) 461 encode_hdlc(bc); 462 if (bc->hdlctx.bufcnt <= 0) 463 return 0; 464 if (!bc->ch_params.fulldup) { 465 if (!(stat & EPP_DCDBIT)) { 466 bc->hdlctx.slotcnt = bc->ch_params.slottime; 467 return 0; 468 } 469 if ((--bc->hdlctx.slotcnt) > 0) 470 return 0; 471 bc->hdlctx.slotcnt = bc->ch_params.slottime; 472 if ((random_num() % 256) > bc->ch_params.ppersist) 473 return 0; 474 } 475 } 476 if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) { 477 bc->hdlctx.state = tx_keyup; 478 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay); 479 bc->ptt_keyed++; 480 } 481 while (cnt > 0) { 482 switch (bc->hdlctx.state) { 483 case tx_keyup: 484 i = min_t(int, cnt, bc->hdlctx.flags); 485 cnt -= i; 486 bc->hdlctx.flags -= i; 487 if (bc->hdlctx.flags <= 0) 488 bc->hdlctx.state = tx_data; 489 memset(tmp, 0x7e, sizeof(tmp)); 490 while (i > 0) { 491 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 492 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 493 return -1; 494 i -= j; 495 } 496 break; 497 498 case tx_data: 499 if (bc->hdlctx.bufcnt <= 0) { 500 encode_hdlc(bc); 501 if (bc->hdlctx.bufcnt <= 0) { 502 bc->hdlctx.state = tx_tail; 503 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail); 504 break; 505 } 506 } 507 i = min_t(int, cnt, bc->hdlctx.bufcnt); 508 bc->hdlctx.bufcnt -= i; 509 cnt -= i; 510 if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0)) 511 return -1; 512 bc->hdlctx.bufptr += i; 513 break; 514 515 case tx_tail: 516 encode_hdlc(bc); 517 if (bc->hdlctx.bufcnt > 0) { 518 bc->hdlctx.state = tx_data; 519 break; 520 } 521 i = min_t(int, cnt, bc->hdlctx.flags); 522 if (i) { 523 cnt -= i; 524 bc->hdlctx.flags -= i; 525 memset(tmp, 0x7e, sizeof(tmp)); 526 while (i > 0) { 527 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 528 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 529 return -1; 530 i -= j; 531 } 532 break; 533 } 534 535 default: /* fall through */ 536 if (bc->hdlctx.calibrate <= 0) 537 return 0; 538 i = min_t(int, cnt, bc->hdlctx.calibrate); 539 cnt -= i; 540 bc->hdlctx.calibrate -= i; 541 memset(tmp, 0, sizeof(tmp)); 542 while (i > 0) { 543 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 544 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 545 return -1; 546 i -= j; 547 } 548 break; 549 } 550 } 551 return 0; 552 } 553 554 /* ---------------------------------------------------------------------- */ 555 556 static void do_rxpacket(struct net_device *dev) 557 { 558 struct baycom_state *bc = netdev_priv(dev); 559 struct sk_buff *skb; 560 unsigned char *cp; 561 unsigned pktlen; 562 563 if (bc->hdlcrx.bufcnt < 4) 564 return; 565 if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt)) 566 return; 567 pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */ 568 if (!(skb = dev_alloc_skb(pktlen))) { 569 printk("%s: memory squeeze, dropping packet\n", dev->name); 570 bc->stats.rx_dropped++; 571 return; 572 } 573 cp = skb_put(skb, pktlen); 574 *cp++ = 0; /* KISS kludge */ 575 memcpy(cp, bc->hdlcrx.buf, pktlen - 1); 576 skb->protocol = ax25_type_trans(skb, dev); 577 netif_rx(skb); 578 dev->last_rx = jiffies; 579 bc->stats.rx_packets++; 580 } 581 582 static int receive(struct net_device *dev, int cnt) 583 { 584 struct baycom_state *bc = netdev_priv(dev); 585 struct parport *pp = bc->pdev->port; 586 unsigned int bitbuf, notbitstream, bitstream, numbits, state; 587 unsigned char tmp[128]; 588 unsigned char *cp; 589 int cnt2, ret = 0; 590 int j; 591 592 numbits = bc->hdlcrx.numbits; 593 state = bc->hdlcrx.state; 594 bitstream = bc->hdlcrx.bitstream; 595 bitbuf = bc->hdlcrx.bitbuf; 596 while (cnt > 0) { 597 cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt; 598 cnt -= cnt2; 599 if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) { 600 ret = -1; 601 break; 602 } 603 cp = tmp; 604 for (; cnt2 > 0; cnt2--, cp++) { 605 bitstream >>= 8; 606 bitstream |= (*cp) << 8; 607 bitbuf >>= 8; 608 bitbuf |= (*cp) << 8; 609 numbits += 8; 610 notbitstream = ~bitstream; 611 for (j = 0; j < 8; j++) { 612 613 /* flag or abort */ 614 if (unlikely(!(notbitstream & (0x0fc << j)))) { 615 616 /* abort received */ 617 if (!(notbitstream & (0x1fc << j))) 618 state = 0; 619 620 /* not flag received */ 621 else if (!(bitstream & (0x1fe << j)) != (0x0fc << j)) { 622 if (state) 623 do_rxpacket(dev); 624 bc->hdlcrx.bufcnt = 0; 625 bc->hdlcrx.bufptr = bc->hdlcrx.buf; 626 state = 1; 627 numbits = 7-j; 628 } 629 } 630 631 /* stuffed bit */ 632 else if (unlikely((bitstream & (0x1f8 << j)) == (0xf8 << j))) { 633 numbits--; 634 bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1); 635 } 636 } 637 while (state && numbits >= 8) { 638 if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) { 639 state = 0; 640 } else { 641 *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits); 642 bc->hdlcrx.bufcnt++; 643 numbits -= 8; 644 } 645 } 646 } 647 } 648 bc->hdlcrx.numbits = numbits; 649 bc->hdlcrx.state = state; 650 bc->hdlcrx.bitstream = bitstream; 651 bc->hdlcrx.bitbuf = bitbuf; 652 return ret; 653 } 654 655 /* --------------------------------------------------------------------- */ 656 657 #ifdef __i386__ 658 #include <asm/msr.h> 659 #define GETTICK(x) \ 660 ({ \ 661 if (cpu_has_tsc) \ 662 rdtscl(x); \ 663 }) 664 #else /* __i386__ */ 665 #define GETTICK(x) 666 #endif /* __i386__ */ 667 668 static void epp_bh(struct net_device *dev) 669 { 670 struct baycom_state *bc; 671 struct parport *pp; 672 unsigned char stat; 673 unsigned char tmp[2]; 674 unsigned int time1 = 0, time2 = 0, time3 = 0; 675 int cnt, cnt2; 676 677 bc = netdev_priv(dev); 678 if (!bc->work_running) 679 return; 680 baycom_int_freq(bc); 681 pp = bc->pdev->port; 682 /* update status */ 683 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 684 goto epptimeout; 685 bc->stat = stat; 686 bc->debug_vals.last_pllcorr = stat; 687 GETTICK(time1); 688 if (bc->modem == EPP_FPGAEXTSTATUS) { 689 /* get input count */ 690 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1; 691 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 692 goto epptimeout; 693 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2) 694 goto epptimeout; 695 cnt = tmp[0] | (tmp[1] << 8); 696 cnt &= 0x7fff; 697 /* get output count */ 698 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2; 699 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 700 goto epptimeout; 701 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2) 702 goto epptimeout; 703 cnt2 = tmp[0] | (tmp[1] << 8); 704 cnt2 = 16384 - (cnt2 & 0x7fff); 705 /* return to normal */ 706 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE; 707 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 708 goto epptimeout; 709 if (transmit(bc, cnt2, stat)) 710 goto epptimeout; 711 GETTICK(time2); 712 if (receive(dev, cnt)) 713 goto epptimeout; 714 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 715 goto epptimeout; 716 bc->stat = stat; 717 } else { 718 /* try to tx */ 719 switch (stat & (EPP_NTAEF|EPP_NTHF)) { 720 case EPP_NTHF: 721 cnt = 2048 - 256; 722 break; 723 724 case EPP_NTAEF: 725 cnt = 2048 - 1793; 726 break; 727 728 case 0: 729 cnt = 0; 730 break; 731 732 default: 733 cnt = 2048 - 1025; 734 break; 735 } 736 if (transmit(bc, cnt, stat)) 737 goto epptimeout; 738 GETTICK(time2); 739 /* do receiver */ 740 while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) { 741 switch (stat & (EPP_NRAEF|EPP_NRHF)) { 742 case EPP_NRAEF: 743 cnt = 1025; 744 break; 745 746 case 0: 747 cnt = 1793; 748 break; 749 750 default: 751 cnt = 256; 752 break; 753 } 754 if (receive(dev, cnt)) 755 goto epptimeout; 756 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 757 goto epptimeout; 758 } 759 cnt = 0; 760 if (bc->bitrate < 50000) 761 cnt = 256; 762 else if (bc->bitrate < 100000) 763 cnt = 128; 764 while (cnt > 0 && stat & EPP_NREF) { 765 if (receive(dev, 1)) 766 goto epptimeout; 767 cnt--; 768 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 769 goto epptimeout; 770 } 771 } 772 GETTICK(time3); 773 #ifdef BAYCOM_DEBUG 774 bc->debug_vals.mod_cycles = time2 - time1; 775 bc->debug_vals.demod_cycles = time3 - time2; 776 #endif /* BAYCOM_DEBUG */ 777 schedule_delayed_work(&bc->run_work, 1); 778 if (!bc->skb) 779 netif_wake_queue(dev); 780 return; 781 epptimeout: 782 printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname); 783 } 784 785 /* ---------------------------------------------------------------------- */ 786 /* 787 * ===================== network driver interface ========================= 788 */ 789 790 static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev) 791 { 792 struct baycom_state *bc = netdev_priv(dev); 793 794 if (skb->data[0] != 0) { 795 do_kiss_params(bc, skb->data, skb->len); 796 dev_kfree_skb(skb); 797 return 0; 798 } 799 if (bc->skb) 800 return -1; 801 /* strip KISS byte */ 802 if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) { 803 dev_kfree_skb(skb); 804 return 0; 805 } 806 netif_stop_queue(dev); 807 bc->skb = skb; 808 return 0; 809 } 810 811 /* --------------------------------------------------------------------- */ 812 813 static int baycom_set_mac_address(struct net_device *dev, void *addr) 814 { 815 struct sockaddr *sa = (struct sockaddr *)addr; 816 817 /* addr is an AX.25 shifted ASCII mac address */ 818 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); 819 return 0; 820 } 821 822 /* --------------------------------------------------------------------- */ 823 824 static struct net_device_stats *baycom_get_stats(struct net_device *dev) 825 { 826 struct baycom_state *bc = netdev_priv(dev); 827 828 /* 829 * Get the current statistics. This may be called with the 830 * card open or closed. 831 */ 832 return &bc->stats; 833 } 834 835 /* --------------------------------------------------------------------- */ 836 837 static void epp_wakeup(void *handle) 838 { 839 struct net_device *dev = (struct net_device *)handle; 840 struct baycom_state *bc = netdev_priv(dev); 841 842 printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name); 843 if (!parport_claim(bc->pdev)) 844 printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name); 845 } 846 847 /* --------------------------------------------------------------------- */ 848 849 /* 850 * Open/initialize the board. This is called (in the current kernel) 851 * sometime after booting when the 'ifconfig' program is run. 852 * 853 * This routine should set everything up anew at each open, even 854 * registers that "should" only need to be set once at boot, so that 855 * there is non-reboot way to recover if something goes wrong. 856 */ 857 858 static int epp_open(struct net_device *dev) 859 { 860 struct baycom_state *bc = netdev_priv(dev); 861 struct parport *pp = parport_find_base(dev->base_addr); 862 unsigned int i, j; 863 unsigned char tmp[128]; 864 unsigned char stat; 865 unsigned long tstart; 866 867 if (!pp) { 868 printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr); 869 return -ENXIO; 870 } 871 #if 0 872 if (pp->irq < 0) { 873 printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base); 874 parport_put_port(pp); 875 return -ENXIO; 876 } 877 #endif 878 if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) { 879 printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n", 880 bc_drvname, pp->base); 881 parport_put_port(pp); 882 return -EIO; 883 } 884 memset(&bc->modem, 0, sizeof(bc->modem)); 885 bc->pdev = parport_register_device(pp, dev->name, NULL, epp_wakeup, 886 epp_interrupt, PARPORT_DEV_EXCL, dev); 887 parport_put_port(pp); 888 if (!bc->pdev) { 889 printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base); 890 return -ENXIO; 891 } 892 if (parport_claim(bc->pdev)) { 893 printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base); 894 parport_unregister_device(bc->pdev); 895 return -EBUSY; 896 } 897 dev->irq = /*pp->irq*/ 0; 898 INIT_WORK(&bc->run_work, (void *)(void *)epp_bh, dev); 899 bc->work_running = 1; 900 bc->modem = EPP_CONVENTIONAL; 901 if (eppconfig(bc)) 902 printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname); 903 else 904 bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS; 905 parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */ 906 /* reset the modem */ 907 tmp[0] = 0; 908 tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE; 909 if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2) 910 goto epptimeout; 911 /* autoprobe baud rate */ 912 tstart = jiffies; 913 i = 0; 914 while ((signed)(jiffies-tstart-HZ/3) < 0) { 915 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 916 goto epptimeout; 917 if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) { 918 schedule(); 919 continue; 920 } 921 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128) 922 goto epptimeout; 923 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128) 924 goto epptimeout; 925 i += 256; 926 } 927 for (j = 0; j < 256; j++) { 928 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 929 goto epptimeout; 930 if (!(stat & EPP_NREF)) 931 break; 932 if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1) 933 goto epptimeout; 934 i++; 935 } 936 tstart = jiffies - tstart; 937 bc->bitrate = i * (8 * HZ) / tstart; 938 j = 1; 939 i = bc->bitrate >> 3; 940 while (j < 7 && i > 150) { 941 j++; 942 i >>= 1; 943 } 944 printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n", 945 bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2)); 946 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/; 947 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 948 goto epptimeout; 949 /* 950 * initialise hdlc variables 951 */ 952 bc->hdlcrx.state = 0; 953 bc->hdlcrx.numbits = 0; 954 bc->hdlctx.state = tx_idle; 955 bc->hdlctx.bufcnt = 0; 956 bc->hdlctx.slotcnt = bc->ch_params.slottime; 957 bc->hdlctx.calibrate = 0; 958 /* start the bottom half stuff */ 959 schedule_delayed_work(&bc->run_work, 1); 960 netif_start_queue(dev); 961 return 0; 962 963 epptimeout: 964 printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname); 965 parport_write_control(pp, 0); /* reset the adapter */ 966 parport_release(bc->pdev); 967 parport_unregister_device(bc->pdev); 968 return -EIO; 969 } 970 971 /* --------------------------------------------------------------------- */ 972 973 static int epp_close(struct net_device *dev) 974 { 975 struct baycom_state *bc = netdev_priv(dev); 976 struct parport *pp = bc->pdev->port; 977 unsigned char tmp[1]; 978 979 bc->work_running = 0; 980 flush_scheduled_work(); 981 bc->stat = EPP_DCDBIT; 982 tmp[0] = 0; 983 pp->ops->epp_write_addr(pp, tmp, 1, 0); 984 parport_write_control(pp, 0); /* reset the adapter */ 985 parport_release(bc->pdev); 986 parport_unregister_device(bc->pdev); 987 if (bc->skb) 988 dev_kfree_skb(bc->skb); 989 bc->skb = NULL; 990 printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n", 991 bc_drvname, dev->base_addr, dev->irq); 992 return 0; 993 } 994 995 /* --------------------------------------------------------------------- */ 996 997 static int baycom_setmode(struct baycom_state *bc, const char *modestr) 998 { 999 const char *cp; 1000 1001 if (strstr(modestr,"intclk")) 1002 bc->cfg.intclk = 1; 1003 if (strstr(modestr,"extclk")) 1004 bc->cfg.intclk = 0; 1005 if (strstr(modestr,"intmodem")) 1006 bc->cfg.extmodem = 0; 1007 if (strstr(modestr,"extmodem")) 1008 bc->cfg.extmodem = 1; 1009 if (strstr(modestr,"noloopback")) 1010 bc->cfg.loopback = 0; 1011 if (strstr(modestr,"loopback")) 1012 bc->cfg.loopback = 1; 1013 if ((cp = strstr(modestr,"fclk="))) { 1014 bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0); 1015 if (bc->cfg.fclk < 1000000) 1016 bc->cfg.fclk = 1000000; 1017 if (bc->cfg.fclk > 25000000) 1018 bc->cfg.fclk = 25000000; 1019 } 1020 if ((cp = strstr(modestr,"bps="))) { 1021 bc->cfg.bps = simple_strtoul(cp+4, NULL, 0); 1022 if (bc->cfg.bps < 1000) 1023 bc->cfg.bps = 1000; 1024 if (bc->cfg.bps > 1500000) 1025 bc->cfg.bps = 1500000; 1026 } 1027 return 0; 1028 } 1029 1030 /* --------------------------------------------------------------------- */ 1031 1032 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 1033 { 1034 struct baycom_state *bc = netdev_priv(dev); 1035 struct hdlcdrv_ioctl hi; 1036 1037 if (cmd != SIOCDEVPRIVATE) 1038 return -ENOIOCTLCMD; 1039 1040 if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi))) 1041 return -EFAULT; 1042 switch (hi.cmd) { 1043 default: 1044 return -ENOIOCTLCMD; 1045 1046 case HDLCDRVCTL_GETCHANNELPAR: 1047 hi.data.cp.tx_delay = bc->ch_params.tx_delay; 1048 hi.data.cp.tx_tail = bc->ch_params.tx_tail; 1049 hi.data.cp.slottime = bc->ch_params.slottime; 1050 hi.data.cp.ppersist = bc->ch_params.ppersist; 1051 hi.data.cp.fulldup = bc->ch_params.fulldup; 1052 break; 1053 1054 case HDLCDRVCTL_SETCHANNELPAR: 1055 if (!capable(CAP_NET_ADMIN)) 1056 return -EACCES; 1057 bc->ch_params.tx_delay = hi.data.cp.tx_delay; 1058 bc->ch_params.tx_tail = hi.data.cp.tx_tail; 1059 bc->ch_params.slottime = hi.data.cp.slottime; 1060 bc->ch_params.ppersist = hi.data.cp.ppersist; 1061 bc->ch_params.fulldup = hi.data.cp.fulldup; 1062 bc->hdlctx.slotcnt = 1; 1063 return 0; 1064 1065 case HDLCDRVCTL_GETMODEMPAR: 1066 hi.data.mp.iobase = dev->base_addr; 1067 hi.data.mp.irq = dev->irq; 1068 hi.data.mp.dma = dev->dma; 1069 hi.data.mp.dma2 = 0; 1070 hi.data.mp.seriobase = 0; 1071 hi.data.mp.pariobase = 0; 1072 hi.data.mp.midiiobase = 0; 1073 break; 1074 1075 case HDLCDRVCTL_SETMODEMPAR: 1076 if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev)) 1077 return -EACCES; 1078 dev->base_addr = hi.data.mp.iobase; 1079 dev->irq = /*hi.data.mp.irq*/0; 1080 dev->dma = /*hi.data.mp.dma*/0; 1081 return 0; 1082 1083 case HDLCDRVCTL_GETSTAT: 1084 hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT); 1085 hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT); 1086 hi.data.cs.ptt_keyed = bc->ptt_keyed; 1087 hi.data.cs.tx_packets = bc->stats.tx_packets; 1088 hi.data.cs.tx_errors = bc->stats.tx_errors; 1089 hi.data.cs.rx_packets = bc->stats.rx_packets; 1090 hi.data.cs.rx_errors = bc->stats.rx_errors; 1091 break; 1092 1093 case HDLCDRVCTL_OLDGETSTAT: 1094 hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT); 1095 hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT); 1096 hi.data.ocs.ptt_keyed = bc->ptt_keyed; 1097 break; 1098 1099 case HDLCDRVCTL_CALIBRATE: 1100 if (!capable(CAP_SYS_RAWIO)) 1101 return -EACCES; 1102 bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8; 1103 return 0; 1104 1105 case HDLCDRVCTL_DRIVERNAME: 1106 strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername)); 1107 break; 1108 1109 case HDLCDRVCTL_GETMODE: 1110 sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s", 1111 bc->cfg.intclk ? "int" : "ext", 1112 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, 1113 bc->cfg.loopback ? ",loopback" : ""); 1114 break; 1115 1116 case HDLCDRVCTL_SETMODE: 1117 if (!capable(CAP_NET_ADMIN) || netif_running(dev)) 1118 return -EACCES; 1119 hi.data.modename[sizeof(hi.data.modename)-1] = '\0'; 1120 return baycom_setmode(bc, hi.data.modename); 1121 1122 case HDLCDRVCTL_MODELIST: 1123 strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x", 1124 sizeof(hi.data.modename)); 1125 break; 1126 1127 case HDLCDRVCTL_MODEMPARMASK: 1128 return HDLCDRV_PARMASK_IOBASE; 1129 1130 } 1131 if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi))) 1132 return -EFAULT; 1133 return 0; 1134 } 1135 1136 /* --------------------------------------------------------------------- */ 1137 1138 /* 1139 * Check for a network adaptor of this type, and return '0' if one exists. 1140 * If dev->base_addr == 0, probe all likely locations. 1141 * If dev->base_addr == 1, always return failure. 1142 * If dev->base_addr == 2, allocate space for the device and return success 1143 * (detachable devices only). 1144 */ 1145 static void baycom_probe(struct net_device *dev) 1146 { 1147 static char ax25_bcast[AX25_ADDR_LEN] = { 1148 'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, '0' << 1 1149 }; 1150 static char ax25_nocall[AX25_ADDR_LEN] = { 1151 'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, '1' << 1 1152 }; 1153 const struct hdlcdrv_channel_params dflt_ch_params = { 1154 20, 2, 10, 40, 0 1155 }; 1156 struct baycom_state *bc; 1157 1158 /* 1159 * not a real probe! only initialize data structures 1160 */ 1161 bc = netdev_priv(dev); 1162 /* 1163 * initialize the baycom_state struct 1164 */ 1165 bc->ch_params = dflt_ch_params; 1166 bc->ptt_keyed = 0; 1167 1168 /* 1169 * initialize the device struct 1170 */ 1171 dev->open = epp_open; 1172 dev->stop = epp_close; 1173 dev->do_ioctl = baycom_ioctl; 1174 dev->hard_start_xmit = baycom_send_packet; 1175 dev->get_stats = baycom_get_stats; 1176 1177 /* Fill in the fields of the device structure */ 1178 bc->skb = NULL; 1179 1180 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE) 1181 dev->hard_header = ax25_encapsulate; 1182 dev->rebuild_header = ax25_rebuild_header; 1183 #else /* CONFIG_AX25 || CONFIG_AX25_MODULE */ 1184 dev->hard_header = NULL; 1185 dev->rebuild_header = NULL; 1186 #endif /* CONFIG_AX25 || CONFIG_AX25_MODULE */ 1187 dev->set_mac_address = baycom_set_mac_address; 1188 1189 dev->type = ARPHRD_AX25; /* AF_AX25 device */ 1190 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN; 1191 dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */ 1192 dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */ 1193 memcpy(dev->broadcast, ax25_bcast, AX25_ADDR_LEN); 1194 memcpy(dev->dev_addr, ax25_nocall, AX25_ADDR_LEN); 1195 dev->tx_queue_len = 16; 1196 1197 /* New style flags */ 1198 dev->flags = 0; 1199 } 1200 1201 /* --------------------------------------------------------------------- */ 1202 1203 /* 1204 * command line settable parameters 1205 */ 1206 static const char *mode[NR_PORTS] = { "", }; 1207 static int iobase[NR_PORTS] = { 0x378, }; 1208 1209 module_param_array(mode, charp, NULL, 0); 1210 MODULE_PARM_DESC(mode, "baycom operating mode"); 1211 module_param_array(iobase, int, NULL, 0); 1212 MODULE_PARM_DESC(iobase, "baycom io base address"); 1213 1214 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); 1215 MODULE_DESCRIPTION("Baycom epp amateur radio modem driver"); 1216 MODULE_LICENSE("GPL"); 1217 1218 /* --------------------------------------------------------------------- */ 1219 1220 static void __init baycom_epp_dev_setup(struct net_device *dev) 1221 { 1222 struct baycom_state *bc = netdev_priv(dev); 1223 1224 /* 1225 * initialize part of the baycom_state struct 1226 */ 1227 bc->magic = BAYCOM_MAGIC; 1228 bc->cfg.fclk = 19666600; 1229 bc->cfg.bps = 9600; 1230 /* 1231 * initialize part of the device struct 1232 */ 1233 baycom_probe(dev); 1234 } 1235 1236 static int __init init_baycomepp(void) 1237 { 1238 int i, found = 0; 1239 char set_hw = 1; 1240 1241 printk(bc_drvinfo); 1242 /* 1243 * register net devices 1244 */ 1245 for (i = 0; i < NR_PORTS; i++) { 1246 struct net_device *dev; 1247 1248 dev = alloc_netdev(sizeof(struct baycom_state), "bce%d", 1249 baycom_epp_dev_setup); 1250 1251 if (!dev) { 1252 printk(KERN_WARNING "bce%d : out of memory\n", i); 1253 return found ? 0 : -ENOMEM; 1254 } 1255 1256 sprintf(dev->name, "bce%d", i); 1257 dev->base_addr = iobase[i]; 1258 1259 if (!mode[i]) 1260 set_hw = 0; 1261 if (!set_hw) 1262 iobase[i] = 0; 1263 1264 if (register_netdev(dev)) { 1265 printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name); 1266 free_netdev(dev); 1267 break; 1268 } 1269 if (set_hw && baycom_setmode(netdev_priv(dev), mode[i])) 1270 set_hw = 0; 1271 baycom_device[i] = dev; 1272 found++; 1273 } 1274 1275 return found ? 0 : -ENXIO; 1276 } 1277 1278 static void __exit cleanup_baycomepp(void) 1279 { 1280 int i; 1281 1282 for(i = 0; i < NR_PORTS; i++) { 1283 struct net_device *dev = baycom_device[i]; 1284 1285 if (dev) { 1286 struct baycom_state *bc = netdev_priv(dev); 1287 if (bc->magic == BAYCOM_MAGIC) { 1288 unregister_netdev(dev); 1289 free_netdev(dev); 1290 } else 1291 printk(paranoia_str, "cleanup_module"); 1292 } 1293 } 1294 } 1295 1296 module_init(init_baycomepp); 1297 module_exit(cleanup_baycomepp); 1298 1299 /* --------------------------------------------------------------------- */ 1300 1301 #ifndef MODULE 1302 1303 /* 1304 * format: baycom_epp=io,mode 1305 * mode: fpga config options 1306 */ 1307 1308 static int __init baycom_epp_setup(char *str) 1309 { 1310 static unsigned __initdata nr_dev = 0; 1311 int ints[2]; 1312 1313 if (nr_dev >= NR_PORTS) 1314 return 0; 1315 str = get_options(str, 2, ints); 1316 if (ints[0] < 1) 1317 return 0; 1318 mode[nr_dev] = str; 1319 iobase[nr_dev] = ints[1]; 1320 nr_dev++; 1321 return 1; 1322 } 1323 1324 __setup("baycom_epp=", baycom_epp_setup); 1325 1326 #endif /* MODULE */ 1327 /* --------------------------------------------------------------------- */ 1328