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 <linux/random.h> 56 #include <net/ax25.h> 57 #include <asm/uaccess.h> 58 59 /* --------------------------------------------------------------------- */ 60 61 #define BAYCOM_DEBUG 62 #define BAYCOM_MAGIC 19730510 63 64 /* --------------------------------------------------------------------- */ 65 66 static const char paranoia_str[] = KERN_ERR 67 "baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n"; 68 69 static const char bc_drvname[] = "baycom_epp"; 70 static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n" 71 KERN_INFO "baycom_epp: version 0.7 compiled " __TIME__ " " __DATE__ "\n"; 72 73 /* --------------------------------------------------------------------- */ 74 75 #define NR_PORTS 4 76 77 static struct net_device *baycom_device[NR_PORTS]; 78 79 /* --------------------------------------------------------------------- */ 80 81 /* EPP status register */ 82 #define EPP_DCDBIT 0x80 83 #define EPP_PTTBIT 0x08 84 #define EPP_NREF 0x01 85 #define EPP_NRAEF 0x02 86 #define EPP_NRHF 0x04 87 #define EPP_NTHF 0x20 88 #define EPP_NTAEF 0x10 89 #define EPP_NTEF EPP_PTTBIT 90 91 /* EPP control register */ 92 #define EPP_TX_FIFO_ENABLE 0x10 93 #define EPP_RX_FIFO_ENABLE 0x08 94 #define EPP_MODEM_ENABLE 0x20 95 #define EPP_LEDS 0xC0 96 #define EPP_IRQ_ENABLE 0x10 97 98 /* LPT registers */ 99 #define LPTREG_ECONTROL 0x402 100 #define LPTREG_CONFIGB 0x401 101 #define LPTREG_CONFIGA 0x400 102 #define LPTREG_EPPDATA 0x004 103 #define LPTREG_EPPADDR 0x003 104 #define LPTREG_CONTROL 0x002 105 #define LPTREG_STATUS 0x001 106 #define LPTREG_DATA 0x000 107 108 /* LPT control register */ 109 #define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */ 110 #define LPTCTRL_WRITE 0x01 111 #define LPTCTRL_ADDRSTB 0x08 112 #define LPTCTRL_DATASTB 0x02 113 #define LPTCTRL_INTEN 0x10 114 115 /* LPT status register */ 116 #define LPTSTAT_SHIFT_NINTR 6 117 #define LPTSTAT_WAIT 0x80 118 #define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR) 119 #define LPTSTAT_PE 0x20 120 #define LPTSTAT_DONE 0x10 121 #define LPTSTAT_NERROR 0x08 122 #define LPTSTAT_EPPTIMEOUT 0x01 123 124 /* LPT data register */ 125 #define LPTDATA_SHIFT_TDI 0 126 #define LPTDATA_SHIFT_TMS 2 127 #define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI) 128 #define LPTDATA_TCK 0x02 129 #define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS) 130 #define LPTDATA_INITBIAS 0x80 131 132 133 /* EPP modem config/status bits */ 134 #define EPP_DCDBIT 0x80 135 #define EPP_PTTBIT 0x08 136 #define EPP_RXEBIT 0x01 137 #define EPP_RXAEBIT 0x02 138 #define EPP_RXHFULL 0x04 139 140 #define EPP_NTHF 0x20 141 #define EPP_NTAEF 0x10 142 #define EPP_NTEF EPP_PTTBIT 143 144 #define EPP_TX_FIFO_ENABLE 0x10 145 #define EPP_RX_FIFO_ENABLE 0x08 146 #define EPP_MODEM_ENABLE 0x20 147 #define EPP_LEDS 0xC0 148 #define EPP_IRQ_ENABLE 0x10 149 150 /* Xilinx 4k JTAG instructions */ 151 #define XC4K_IRLENGTH 3 152 #define XC4K_EXTEST 0 153 #define XC4K_PRELOAD 1 154 #define XC4K_CONFIGURE 5 155 #define XC4K_BYPASS 7 156 157 #define EPP_CONVENTIONAL 0 158 #define EPP_FPGA 1 159 #define EPP_FPGAEXTSTATUS 2 160 161 #define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8) 162 163 /* ---------------------------------------------------------------------- */ 164 /* 165 * Information that need to be kept for each board. 166 */ 167 168 struct baycom_state { 169 int magic; 170 171 struct pardevice *pdev; 172 struct net_device *dev; 173 unsigned int work_running; 174 struct delayed_work run_work; 175 unsigned int modem; 176 unsigned int bitrate; 177 unsigned char stat; 178 179 struct { 180 unsigned int intclk; 181 unsigned int fclk; 182 unsigned int bps; 183 unsigned int extmodem; 184 unsigned int loopback; 185 } cfg; 186 187 struct hdlcdrv_channel_params ch_params; 188 189 struct { 190 unsigned int bitbuf, bitstream, numbits, state; 191 unsigned char *bufptr; 192 int bufcnt; 193 unsigned char buf[TXBUFFER_SIZE]; 194 } hdlcrx; 195 196 struct { 197 int calibrate; 198 int slotcnt; 199 int flags; 200 enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state; 201 unsigned char *bufptr; 202 int bufcnt; 203 unsigned char buf[TXBUFFER_SIZE]; 204 } hdlctx; 205 206 struct net_device_stats stats; 207 unsigned int ptt_keyed; 208 struct sk_buff *skb; /* next transmit packet */ 209 210 #ifdef BAYCOM_DEBUG 211 struct debug_vals { 212 unsigned long last_jiffies; 213 unsigned cur_intcnt; 214 unsigned last_intcnt; 215 int cur_pllcorr; 216 int last_pllcorr; 217 unsigned int mod_cycles; 218 unsigned int demod_cycles; 219 } debug_vals; 220 #endif /* BAYCOM_DEBUG */ 221 }; 222 223 /* --------------------------------------------------------------------- */ 224 225 #define KISS_VERBOSE 226 227 /* --------------------------------------------------------------------- */ 228 229 #define PARAM_TXDELAY 1 230 #define PARAM_PERSIST 2 231 #define PARAM_SLOTTIME 3 232 #define PARAM_TXTAIL 4 233 #define PARAM_FULLDUP 5 234 #define PARAM_HARDWARE 6 235 #define PARAM_RETURN 255 236 237 /* --------------------------------------------------------------------- */ 238 /* 239 * the CRC routines are stolen from WAMPES 240 * by Dieter Deyke 241 */ 242 243 244 /*---------------------------------------------------------------------------*/ 245 246 #if 0 247 static inline void append_crc_ccitt(unsigned char *buffer, int len) 248 { 249 unsigned int crc = 0xffff; 250 251 for (;len>0;len--) 252 crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff]; 253 crc ^= 0xffff; 254 *buffer++ = crc; 255 *buffer++ = crc >> 8; 256 } 257 #endif 258 259 /*---------------------------------------------------------------------------*/ 260 261 static inline int check_crc_ccitt(const unsigned char *buf, int cnt) 262 { 263 return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8; 264 } 265 266 /*---------------------------------------------------------------------------*/ 267 268 static inline int calc_crc_ccitt(const unsigned char *buf, int cnt) 269 { 270 return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff; 271 } 272 273 /* ---------------------------------------------------------------------- */ 274 275 #define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800) 276 277 /* --------------------------------------------------------------------- */ 278 279 static inline void baycom_int_freq(struct baycom_state *bc) 280 { 281 #ifdef BAYCOM_DEBUG 282 unsigned long cur_jiffies = jiffies; 283 /* 284 * measure the interrupt frequency 285 */ 286 bc->debug_vals.cur_intcnt++; 287 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { 288 bc->debug_vals.last_jiffies = cur_jiffies; 289 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; 290 bc->debug_vals.cur_intcnt = 0; 291 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; 292 bc->debug_vals.cur_pllcorr = 0; 293 } 294 #endif /* BAYCOM_DEBUG */ 295 } 296 297 /* ---------------------------------------------------------------------- */ 298 /* 299 * eppconfig_path should be setable via /proc/sys. 300 */ 301 302 static char eppconfig_path[256] = "/usr/sbin/eppfpga"; 303 304 static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL }; 305 306 /* eppconfig: called during ifconfig up to configure the modem */ 307 static int eppconfig(struct baycom_state *bc) 308 { 309 char modearg[256]; 310 char portarg[16]; 311 char *argv[] = { eppconfig_path, "-s", "-p", portarg, "-m", modearg, 312 NULL }; 313 314 /* set up arguments */ 315 sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat", 316 bc->cfg.intclk ? "int" : "ext", 317 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, 318 (bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps), 319 bc->cfg.loopback ? ",loopback" : ""); 320 sprintf(portarg, "%ld", bc->pdev->port->base); 321 printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg); 322 323 return call_usermodehelper(eppconfig_path, argv, envp, UMH_WAIT_PROC); 324 } 325 326 /* ---------------------------------------------------------------------- */ 327 328 static inline void do_kiss_params(struct baycom_state *bc, 329 unsigned char *data, unsigned long len) 330 { 331 332 #ifdef KISS_VERBOSE 333 #define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b) 334 #else /* KISS_VERBOSE */ 335 #define PKP(a,b) 336 #endif /* KISS_VERBOSE */ 337 338 if (len < 2) 339 return; 340 switch(data[0]) { 341 case PARAM_TXDELAY: 342 bc->ch_params.tx_delay = data[1]; 343 PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay); 344 break; 345 case PARAM_PERSIST: 346 bc->ch_params.ppersist = data[1]; 347 PKP("p persistence = %u", bc->ch_params.ppersist); 348 break; 349 case PARAM_SLOTTIME: 350 bc->ch_params.slottime = data[1]; 351 PKP("slot time = %ums", bc->ch_params.slottime); 352 break; 353 case PARAM_TXTAIL: 354 bc->ch_params.tx_tail = data[1]; 355 PKP("TX tail = %ums", bc->ch_params.tx_tail); 356 break; 357 case PARAM_FULLDUP: 358 bc->ch_params.fulldup = !!data[1]; 359 PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half"); 360 break; 361 default: 362 break; 363 } 364 #undef PKP 365 } 366 367 /* --------------------------------------------------------------------- */ 368 369 static void encode_hdlc(struct baycom_state *bc) 370 { 371 struct sk_buff *skb; 372 unsigned char *wp, *bp; 373 int pkt_len; 374 unsigned bitstream, notbitstream, bitbuf, numbit, crc; 375 unsigned char crcarr[2]; 376 int j; 377 378 if (bc->hdlctx.bufcnt > 0) 379 return; 380 skb = bc->skb; 381 if (!skb) 382 return; 383 bc->skb = NULL; 384 pkt_len = skb->len-1; /* strip KISS byte */ 385 wp = bc->hdlctx.buf; 386 bp = skb->data+1; 387 crc = calc_crc_ccitt(bp, pkt_len); 388 crcarr[0] = crc; 389 crcarr[1] = crc >> 8; 390 *wp++ = 0x7e; 391 bitstream = bitbuf = numbit = 0; 392 while (pkt_len > -2) { 393 bitstream >>= 8; 394 bitstream |= ((unsigned int)*bp) << 8; 395 bitbuf |= ((unsigned int)*bp) << numbit; 396 notbitstream = ~bitstream; 397 bp++; 398 pkt_len--; 399 if (!pkt_len) 400 bp = crcarr; 401 for (j = 0; j < 8; j++) 402 if (unlikely(!(notbitstream & (0x1f0 << j)))) { 403 bitstream &= ~(0x100 << j); 404 bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) | 405 ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1); 406 numbit++; 407 notbitstream = ~bitstream; 408 } 409 numbit += 8; 410 while (numbit >= 8) { 411 *wp++ = bitbuf; 412 bitbuf >>= 8; 413 numbit -= 8; 414 } 415 } 416 bitbuf |= 0x7e7e << numbit; 417 numbit += 16; 418 while (numbit >= 8) { 419 *wp++ = bitbuf; 420 bitbuf >>= 8; 421 numbit -= 8; 422 } 423 bc->hdlctx.bufptr = bc->hdlctx.buf; 424 bc->hdlctx.bufcnt = wp - bc->hdlctx.buf; 425 dev_kfree_skb(skb); 426 bc->stats.tx_packets++; 427 } 428 429 /* ---------------------------------------------------------------------- */ 430 431 static int transmit(struct baycom_state *bc, int cnt, unsigned char stat) 432 { 433 struct parport *pp = bc->pdev->port; 434 unsigned char tmp[128]; 435 int i, j; 436 437 if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT)) 438 bc->hdlctx.state = tx_idle; 439 if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) { 440 if (bc->hdlctx.bufcnt <= 0) 441 encode_hdlc(bc); 442 if (bc->hdlctx.bufcnt <= 0) 443 return 0; 444 if (!bc->ch_params.fulldup) { 445 if (!(stat & EPP_DCDBIT)) { 446 bc->hdlctx.slotcnt = bc->ch_params.slottime; 447 return 0; 448 } 449 if ((--bc->hdlctx.slotcnt) > 0) 450 return 0; 451 bc->hdlctx.slotcnt = bc->ch_params.slottime; 452 if ((random32() % 256) > bc->ch_params.ppersist) 453 return 0; 454 } 455 } 456 if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) { 457 bc->hdlctx.state = tx_keyup; 458 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay); 459 bc->ptt_keyed++; 460 } 461 while (cnt > 0) { 462 switch (bc->hdlctx.state) { 463 case tx_keyup: 464 i = min_t(int, cnt, bc->hdlctx.flags); 465 cnt -= i; 466 bc->hdlctx.flags -= i; 467 if (bc->hdlctx.flags <= 0) 468 bc->hdlctx.state = tx_data; 469 memset(tmp, 0x7e, sizeof(tmp)); 470 while (i > 0) { 471 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 472 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 473 return -1; 474 i -= j; 475 } 476 break; 477 478 case tx_data: 479 if (bc->hdlctx.bufcnt <= 0) { 480 encode_hdlc(bc); 481 if (bc->hdlctx.bufcnt <= 0) { 482 bc->hdlctx.state = tx_tail; 483 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail); 484 break; 485 } 486 } 487 i = min_t(int, cnt, bc->hdlctx.bufcnt); 488 bc->hdlctx.bufcnt -= i; 489 cnt -= i; 490 if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0)) 491 return -1; 492 bc->hdlctx.bufptr += i; 493 break; 494 495 case tx_tail: 496 encode_hdlc(bc); 497 if (bc->hdlctx.bufcnt > 0) { 498 bc->hdlctx.state = tx_data; 499 break; 500 } 501 i = min_t(int, cnt, bc->hdlctx.flags); 502 if (i) { 503 cnt -= i; 504 bc->hdlctx.flags -= i; 505 memset(tmp, 0x7e, sizeof(tmp)); 506 while (i > 0) { 507 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 508 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 509 return -1; 510 i -= j; 511 } 512 break; 513 } 514 515 default: /* fall through */ 516 if (bc->hdlctx.calibrate <= 0) 517 return 0; 518 i = min_t(int, cnt, bc->hdlctx.calibrate); 519 cnt -= i; 520 bc->hdlctx.calibrate -= i; 521 memset(tmp, 0, sizeof(tmp)); 522 while (i > 0) { 523 j = (i > sizeof(tmp)) ? sizeof(tmp) : i; 524 if (j != pp->ops->epp_write_data(pp, tmp, j, 0)) 525 return -1; 526 i -= j; 527 } 528 break; 529 } 530 } 531 return 0; 532 } 533 534 /* ---------------------------------------------------------------------- */ 535 536 static void do_rxpacket(struct net_device *dev) 537 { 538 struct baycom_state *bc = netdev_priv(dev); 539 struct sk_buff *skb; 540 unsigned char *cp; 541 unsigned pktlen; 542 543 if (bc->hdlcrx.bufcnt < 4) 544 return; 545 if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt)) 546 return; 547 pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */ 548 if (!(skb = dev_alloc_skb(pktlen))) { 549 printk("%s: memory squeeze, dropping packet\n", dev->name); 550 bc->stats.rx_dropped++; 551 return; 552 } 553 cp = skb_put(skb, pktlen); 554 *cp++ = 0; /* KISS kludge */ 555 memcpy(cp, bc->hdlcrx.buf, pktlen - 1); 556 skb->protocol = ax25_type_trans(skb, dev); 557 netif_rx(skb); 558 dev->last_rx = jiffies; 559 bc->stats.rx_packets++; 560 } 561 562 static int receive(struct net_device *dev, int cnt) 563 { 564 struct baycom_state *bc = netdev_priv(dev); 565 struct parport *pp = bc->pdev->port; 566 unsigned int bitbuf, notbitstream, bitstream, numbits, state; 567 unsigned char tmp[128]; 568 unsigned char *cp; 569 int cnt2, ret = 0; 570 int j; 571 572 numbits = bc->hdlcrx.numbits; 573 state = bc->hdlcrx.state; 574 bitstream = bc->hdlcrx.bitstream; 575 bitbuf = bc->hdlcrx.bitbuf; 576 while (cnt > 0) { 577 cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt; 578 cnt -= cnt2; 579 if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) { 580 ret = -1; 581 break; 582 } 583 cp = tmp; 584 for (; cnt2 > 0; cnt2--, cp++) { 585 bitstream >>= 8; 586 bitstream |= (*cp) << 8; 587 bitbuf >>= 8; 588 bitbuf |= (*cp) << 8; 589 numbits += 8; 590 notbitstream = ~bitstream; 591 for (j = 0; j < 8; j++) { 592 593 /* flag or abort */ 594 if (unlikely(!(notbitstream & (0x0fc << j)))) { 595 596 /* abort received */ 597 if (!(notbitstream & (0x1fc << j))) 598 state = 0; 599 600 /* not flag received */ 601 else if (!(bitstream & (0x1fe << j)) != (0x0fc << j)) { 602 if (state) 603 do_rxpacket(dev); 604 bc->hdlcrx.bufcnt = 0; 605 bc->hdlcrx.bufptr = bc->hdlcrx.buf; 606 state = 1; 607 numbits = 7-j; 608 } 609 } 610 611 /* stuffed bit */ 612 else if (unlikely((bitstream & (0x1f8 << j)) == (0xf8 << j))) { 613 numbits--; 614 bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1); 615 } 616 } 617 while (state && numbits >= 8) { 618 if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) { 619 state = 0; 620 } else { 621 *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits); 622 bc->hdlcrx.bufcnt++; 623 numbits -= 8; 624 } 625 } 626 } 627 } 628 bc->hdlcrx.numbits = numbits; 629 bc->hdlcrx.state = state; 630 bc->hdlcrx.bitstream = bitstream; 631 bc->hdlcrx.bitbuf = bitbuf; 632 return ret; 633 } 634 635 /* --------------------------------------------------------------------- */ 636 637 #ifdef __i386__ 638 #include <asm/msr.h> 639 #define GETTICK(x) \ 640 ({ \ 641 if (cpu_has_tsc) \ 642 rdtscl(x); \ 643 }) 644 #else /* __i386__ */ 645 #define GETTICK(x) 646 #endif /* __i386__ */ 647 648 static void epp_bh(struct work_struct *work) 649 { 650 struct net_device *dev; 651 struct baycom_state *bc; 652 struct parport *pp; 653 unsigned char stat; 654 unsigned char tmp[2]; 655 unsigned int time1 = 0, time2 = 0, time3 = 0; 656 int cnt, cnt2; 657 658 bc = container_of(work, struct baycom_state, run_work.work); 659 dev = bc->dev; 660 if (!bc->work_running) 661 return; 662 baycom_int_freq(bc); 663 pp = bc->pdev->port; 664 /* update status */ 665 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 666 goto epptimeout; 667 bc->stat = stat; 668 bc->debug_vals.last_pllcorr = stat; 669 GETTICK(time1); 670 if (bc->modem == EPP_FPGAEXTSTATUS) { 671 /* get input count */ 672 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1; 673 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 674 goto epptimeout; 675 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2) 676 goto epptimeout; 677 cnt = tmp[0] | (tmp[1] << 8); 678 cnt &= 0x7fff; 679 /* get output count */ 680 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2; 681 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 682 goto epptimeout; 683 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2) 684 goto epptimeout; 685 cnt2 = tmp[0] | (tmp[1] << 8); 686 cnt2 = 16384 - (cnt2 & 0x7fff); 687 /* return to normal */ 688 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE; 689 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 690 goto epptimeout; 691 if (transmit(bc, cnt2, stat)) 692 goto epptimeout; 693 GETTICK(time2); 694 if (receive(dev, cnt)) 695 goto epptimeout; 696 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 697 goto epptimeout; 698 bc->stat = stat; 699 } else { 700 /* try to tx */ 701 switch (stat & (EPP_NTAEF|EPP_NTHF)) { 702 case EPP_NTHF: 703 cnt = 2048 - 256; 704 break; 705 706 case EPP_NTAEF: 707 cnt = 2048 - 1793; 708 break; 709 710 case 0: 711 cnt = 0; 712 break; 713 714 default: 715 cnt = 2048 - 1025; 716 break; 717 } 718 if (transmit(bc, cnt, stat)) 719 goto epptimeout; 720 GETTICK(time2); 721 /* do receiver */ 722 while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) { 723 switch (stat & (EPP_NRAEF|EPP_NRHF)) { 724 case EPP_NRAEF: 725 cnt = 1025; 726 break; 727 728 case 0: 729 cnt = 1793; 730 break; 731 732 default: 733 cnt = 256; 734 break; 735 } 736 if (receive(dev, cnt)) 737 goto epptimeout; 738 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 739 goto epptimeout; 740 } 741 cnt = 0; 742 if (bc->bitrate < 50000) 743 cnt = 256; 744 else if (bc->bitrate < 100000) 745 cnt = 128; 746 while (cnt > 0 && stat & EPP_NREF) { 747 if (receive(dev, 1)) 748 goto epptimeout; 749 cnt--; 750 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 751 goto epptimeout; 752 } 753 } 754 GETTICK(time3); 755 #ifdef BAYCOM_DEBUG 756 bc->debug_vals.mod_cycles = time2 - time1; 757 bc->debug_vals.demod_cycles = time3 - time2; 758 #endif /* BAYCOM_DEBUG */ 759 schedule_delayed_work(&bc->run_work, 1); 760 if (!bc->skb) 761 netif_wake_queue(dev); 762 return; 763 epptimeout: 764 printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname); 765 } 766 767 /* ---------------------------------------------------------------------- */ 768 /* 769 * ===================== network driver interface ========================= 770 */ 771 772 static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev) 773 { 774 struct baycom_state *bc = netdev_priv(dev); 775 776 if (skb->data[0] != 0) { 777 do_kiss_params(bc, skb->data, skb->len); 778 dev_kfree_skb(skb); 779 return 0; 780 } 781 if (bc->skb) 782 return -1; 783 /* strip KISS byte */ 784 if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) { 785 dev_kfree_skb(skb); 786 return 0; 787 } 788 netif_stop_queue(dev); 789 bc->skb = skb; 790 return 0; 791 } 792 793 /* --------------------------------------------------------------------- */ 794 795 static int baycom_set_mac_address(struct net_device *dev, void *addr) 796 { 797 struct sockaddr *sa = (struct sockaddr *)addr; 798 799 /* addr is an AX.25 shifted ASCII mac address */ 800 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len); 801 return 0; 802 } 803 804 /* --------------------------------------------------------------------- */ 805 806 static struct net_device_stats *baycom_get_stats(struct net_device *dev) 807 { 808 struct baycom_state *bc = netdev_priv(dev); 809 810 /* 811 * Get the current statistics. This may be called with the 812 * card open or closed. 813 */ 814 return &bc->stats; 815 } 816 817 /* --------------------------------------------------------------------- */ 818 819 static void epp_wakeup(void *handle) 820 { 821 struct net_device *dev = (struct net_device *)handle; 822 struct baycom_state *bc = netdev_priv(dev); 823 824 printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name); 825 if (!parport_claim(bc->pdev)) 826 printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name); 827 } 828 829 /* --------------------------------------------------------------------- */ 830 831 /* 832 * Open/initialize the board. This is called (in the current kernel) 833 * sometime after booting when the 'ifconfig' program is run. 834 * 835 * This routine should set everything up anew at each open, even 836 * registers that "should" only need to be set once at boot, so that 837 * there is non-reboot way to recover if something goes wrong. 838 */ 839 840 static int epp_open(struct net_device *dev) 841 { 842 struct baycom_state *bc = netdev_priv(dev); 843 struct parport *pp = parport_find_base(dev->base_addr); 844 unsigned int i, j; 845 unsigned char tmp[128]; 846 unsigned char stat; 847 unsigned long tstart; 848 849 if (!pp) { 850 printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr); 851 return -ENXIO; 852 } 853 #if 0 854 if (pp->irq < 0) { 855 printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base); 856 parport_put_port(pp); 857 return -ENXIO; 858 } 859 #endif 860 if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) { 861 printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n", 862 bc_drvname, pp->base); 863 parport_put_port(pp); 864 return -EIO; 865 } 866 memset(&bc->modem, 0, sizeof(bc->modem)); 867 bc->pdev = parport_register_device(pp, dev->name, NULL, epp_wakeup, 868 NULL, PARPORT_DEV_EXCL, dev); 869 parport_put_port(pp); 870 if (!bc->pdev) { 871 printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base); 872 return -ENXIO; 873 } 874 if (parport_claim(bc->pdev)) { 875 printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base); 876 parport_unregister_device(bc->pdev); 877 return -EBUSY; 878 } 879 dev->irq = /*pp->irq*/ 0; 880 INIT_DELAYED_WORK(&bc->run_work, epp_bh); 881 bc->work_running = 1; 882 bc->modem = EPP_CONVENTIONAL; 883 if (eppconfig(bc)) 884 printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname); 885 else 886 bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS; 887 parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */ 888 /* reset the modem */ 889 tmp[0] = 0; 890 tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE; 891 if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2) 892 goto epptimeout; 893 /* autoprobe baud rate */ 894 tstart = jiffies; 895 i = 0; 896 while (time_before(jiffies, tstart + HZ/3)) { 897 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 898 goto epptimeout; 899 if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) { 900 schedule(); 901 continue; 902 } 903 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128) 904 goto epptimeout; 905 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128) 906 goto epptimeout; 907 i += 256; 908 } 909 for (j = 0; j < 256; j++) { 910 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1) 911 goto epptimeout; 912 if (!(stat & EPP_NREF)) 913 break; 914 if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1) 915 goto epptimeout; 916 i++; 917 } 918 tstart = jiffies - tstart; 919 bc->bitrate = i * (8 * HZ) / tstart; 920 j = 1; 921 i = bc->bitrate >> 3; 922 while (j < 7 && i > 150) { 923 j++; 924 i >>= 1; 925 } 926 printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n", 927 bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2)); 928 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/; 929 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1) 930 goto epptimeout; 931 /* 932 * initialise hdlc variables 933 */ 934 bc->hdlcrx.state = 0; 935 bc->hdlcrx.numbits = 0; 936 bc->hdlctx.state = tx_idle; 937 bc->hdlctx.bufcnt = 0; 938 bc->hdlctx.slotcnt = bc->ch_params.slottime; 939 bc->hdlctx.calibrate = 0; 940 /* start the bottom half stuff */ 941 schedule_delayed_work(&bc->run_work, 1); 942 netif_start_queue(dev); 943 return 0; 944 945 epptimeout: 946 printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname); 947 parport_write_control(pp, 0); /* reset the adapter */ 948 parport_release(bc->pdev); 949 parport_unregister_device(bc->pdev); 950 return -EIO; 951 } 952 953 /* --------------------------------------------------------------------- */ 954 955 static int epp_close(struct net_device *dev) 956 { 957 struct baycom_state *bc = netdev_priv(dev); 958 struct parport *pp = bc->pdev->port; 959 unsigned char tmp[1]; 960 961 bc->work_running = 0; 962 cancel_delayed_work_sync(&bc->run_work); 963 bc->stat = EPP_DCDBIT; 964 tmp[0] = 0; 965 pp->ops->epp_write_addr(pp, tmp, 1, 0); 966 parport_write_control(pp, 0); /* reset the adapter */ 967 parport_release(bc->pdev); 968 parport_unregister_device(bc->pdev); 969 if (bc->skb) 970 dev_kfree_skb(bc->skb); 971 bc->skb = NULL; 972 printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n", 973 bc_drvname, dev->base_addr, dev->irq); 974 return 0; 975 } 976 977 /* --------------------------------------------------------------------- */ 978 979 static int baycom_setmode(struct baycom_state *bc, const char *modestr) 980 { 981 const char *cp; 982 983 if (strstr(modestr,"intclk")) 984 bc->cfg.intclk = 1; 985 if (strstr(modestr,"extclk")) 986 bc->cfg.intclk = 0; 987 if (strstr(modestr,"intmodem")) 988 bc->cfg.extmodem = 0; 989 if (strstr(modestr,"extmodem")) 990 bc->cfg.extmodem = 1; 991 if (strstr(modestr,"noloopback")) 992 bc->cfg.loopback = 0; 993 if (strstr(modestr,"loopback")) 994 bc->cfg.loopback = 1; 995 if ((cp = strstr(modestr,"fclk="))) { 996 bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0); 997 if (bc->cfg.fclk < 1000000) 998 bc->cfg.fclk = 1000000; 999 if (bc->cfg.fclk > 25000000) 1000 bc->cfg.fclk = 25000000; 1001 } 1002 if ((cp = strstr(modestr,"bps="))) { 1003 bc->cfg.bps = simple_strtoul(cp+4, NULL, 0); 1004 if (bc->cfg.bps < 1000) 1005 bc->cfg.bps = 1000; 1006 if (bc->cfg.bps > 1500000) 1007 bc->cfg.bps = 1500000; 1008 } 1009 return 0; 1010 } 1011 1012 /* --------------------------------------------------------------------- */ 1013 1014 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 1015 { 1016 struct baycom_state *bc = netdev_priv(dev); 1017 struct hdlcdrv_ioctl hi; 1018 1019 if (cmd != SIOCDEVPRIVATE) 1020 return -ENOIOCTLCMD; 1021 1022 if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi))) 1023 return -EFAULT; 1024 switch (hi.cmd) { 1025 default: 1026 return -ENOIOCTLCMD; 1027 1028 case HDLCDRVCTL_GETCHANNELPAR: 1029 hi.data.cp.tx_delay = bc->ch_params.tx_delay; 1030 hi.data.cp.tx_tail = bc->ch_params.tx_tail; 1031 hi.data.cp.slottime = bc->ch_params.slottime; 1032 hi.data.cp.ppersist = bc->ch_params.ppersist; 1033 hi.data.cp.fulldup = bc->ch_params.fulldup; 1034 break; 1035 1036 case HDLCDRVCTL_SETCHANNELPAR: 1037 if (!capable(CAP_NET_ADMIN)) 1038 return -EACCES; 1039 bc->ch_params.tx_delay = hi.data.cp.tx_delay; 1040 bc->ch_params.tx_tail = hi.data.cp.tx_tail; 1041 bc->ch_params.slottime = hi.data.cp.slottime; 1042 bc->ch_params.ppersist = hi.data.cp.ppersist; 1043 bc->ch_params.fulldup = hi.data.cp.fulldup; 1044 bc->hdlctx.slotcnt = 1; 1045 return 0; 1046 1047 case HDLCDRVCTL_GETMODEMPAR: 1048 hi.data.mp.iobase = dev->base_addr; 1049 hi.data.mp.irq = dev->irq; 1050 hi.data.mp.dma = dev->dma; 1051 hi.data.mp.dma2 = 0; 1052 hi.data.mp.seriobase = 0; 1053 hi.data.mp.pariobase = 0; 1054 hi.data.mp.midiiobase = 0; 1055 break; 1056 1057 case HDLCDRVCTL_SETMODEMPAR: 1058 if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev)) 1059 return -EACCES; 1060 dev->base_addr = hi.data.mp.iobase; 1061 dev->irq = /*hi.data.mp.irq*/0; 1062 dev->dma = /*hi.data.mp.dma*/0; 1063 return 0; 1064 1065 case HDLCDRVCTL_GETSTAT: 1066 hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT); 1067 hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT); 1068 hi.data.cs.ptt_keyed = bc->ptt_keyed; 1069 hi.data.cs.tx_packets = bc->stats.tx_packets; 1070 hi.data.cs.tx_errors = bc->stats.tx_errors; 1071 hi.data.cs.rx_packets = bc->stats.rx_packets; 1072 hi.data.cs.rx_errors = bc->stats.rx_errors; 1073 break; 1074 1075 case HDLCDRVCTL_OLDGETSTAT: 1076 hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT); 1077 hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT); 1078 hi.data.ocs.ptt_keyed = bc->ptt_keyed; 1079 break; 1080 1081 case HDLCDRVCTL_CALIBRATE: 1082 if (!capable(CAP_SYS_RAWIO)) 1083 return -EACCES; 1084 bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8; 1085 return 0; 1086 1087 case HDLCDRVCTL_DRIVERNAME: 1088 strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername)); 1089 break; 1090 1091 case HDLCDRVCTL_GETMODE: 1092 sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s", 1093 bc->cfg.intclk ? "int" : "ext", 1094 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps, 1095 bc->cfg.loopback ? ",loopback" : ""); 1096 break; 1097 1098 case HDLCDRVCTL_SETMODE: 1099 if (!capable(CAP_NET_ADMIN) || netif_running(dev)) 1100 return -EACCES; 1101 hi.data.modename[sizeof(hi.data.modename)-1] = '\0'; 1102 return baycom_setmode(bc, hi.data.modename); 1103 1104 case HDLCDRVCTL_MODELIST: 1105 strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x", 1106 sizeof(hi.data.modename)); 1107 break; 1108 1109 case HDLCDRVCTL_MODEMPARMASK: 1110 return HDLCDRV_PARMASK_IOBASE; 1111 1112 } 1113 if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi))) 1114 return -EFAULT; 1115 return 0; 1116 } 1117 1118 /* --------------------------------------------------------------------- */ 1119 1120 /* 1121 * Check for a network adaptor of this type, and return '0' if one exists. 1122 * If dev->base_addr == 0, probe all likely locations. 1123 * If dev->base_addr == 1, always return failure. 1124 * If dev->base_addr == 2, allocate space for the device and return success 1125 * (detachable devices only). 1126 */ 1127 static void baycom_probe(struct net_device *dev) 1128 { 1129 const struct hdlcdrv_channel_params dflt_ch_params = { 1130 20, 2, 10, 40, 0 1131 }; 1132 struct baycom_state *bc; 1133 1134 /* 1135 * not a real probe! only initialize data structures 1136 */ 1137 bc = netdev_priv(dev); 1138 /* 1139 * initialize the baycom_state struct 1140 */ 1141 bc->ch_params = dflt_ch_params; 1142 bc->ptt_keyed = 0; 1143 1144 /* 1145 * initialize the device struct 1146 */ 1147 dev->open = epp_open; 1148 dev->stop = epp_close; 1149 dev->do_ioctl = baycom_ioctl; 1150 dev->hard_start_xmit = baycom_send_packet; 1151 dev->get_stats = baycom_get_stats; 1152 1153 /* Fill in the fields of the device structure */ 1154 bc->skb = NULL; 1155 1156 dev->header_ops = &ax25_header_ops; 1157 dev->set_mac_address = baycom_set_mac_address; 1158 1159 dev->type = ARPHRD_AX25; /* AF_AX25 device */ 1160 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN; 1161 dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */ 1162 dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */ 1163 memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN); 1164 memcpy(dev->dev_addr, &null_ax25_address, AX25_ADDR_LEN); 1165 dev->tx_queue_len = 16; 1166 1167 /* New style flags */ 1168 dev->flags = 0; 1169 } 1170 1171 /* --------------------------------------------------------------------- */ 1172 1173 /* 1174 * command line settable parameters 1175 */ 1176 static const char *mode[NR_PORTS] = { "", }; 1177 static int iobase[NR_PORTS] = { 0x378, }; 1178 1179 module_param_array(mode, charp, NULL, 0); 1180 MODULE_PARM_DESC(mode, "baycom operating mode"); 1181 module_param_array(iobase, int, NULL, 0); 1182 MODULE_PARM_DESC(iobase, "baycom io base address"); 1183 1184 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); 1185 MODULE_DESCRIPTION("Baycom epp amateur radio modem driver"); 1186 MODULE_LICENSE("GPL"); 1187 1188 /* --------------------------------------------------------------------- */ 1189 1190 static void __init baycom_epp_dev_setup(struct net_device *dev) 1191 { 1192 struct baycom_state *bc = netdev_priv(dev); 1193 1194 /* 1195 * initialize part of the baycom_state struct 1196 */ 1197 bc->dev = dev; 1198 bc->magic = BAYCOM_MAGIC; 1199 bc->cfg.fclk = 19666600; 1200 bc->cfg.bps = 9600; 1201 /* 1202 * initialize part of the device struct 1203 */ 1204 baycom_probe(dev); 1205 } 1206 1207 static int __init init_baycomepp(void) 1208 { 1209 int i, found = 0; 1210 char set_hw = 1; 1211 1212 printk(bc_drvinfo); 1213 /* 1214 * register net devices 1215 */ 1216 for (i = 0; i < NR_PORTS; i++) { 1217 struct net_device *dev; 1218 1219 dev = alloc_netdev(sizeof(struct baycom_state), "bce%d", 1220 baycom_epp_dev_setup); 1221 1222 if (!dev) { 1223 printk(KERN_WARNING "bce%d : out of memory\n", i); 1224 return found ? 0 : -ENOMEM; 1225 } 1226 1227 sprintf(dev->name, "bce%d", i); 1228 dev->base_addr = iobase[i]; 1229 1230 if (!mode[i]) 1231 set_hw = 0; 1232 if (!set_hw) 1233 iobase[i] = 0; 1234 1235 if (register_netdev(dev)) { 1236 printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name); 1237 free_netdev(dev); 1238 break; 1239 } 1240 if (set_hw && baycom_setmode(netdev_priv(dev), mode[i])) 1241 set_hw = 0; 1242 baycom_device[i] = dev; 1243 found++; 1244 } 1245 1246 return found ? 0 : -ENXIO; 1247 } 1248 1249 static void __exit cleanup_baycomepp(void) 1250 { 1251 int i; 1252 1253 for(i = 0; i < NR_PORTS; i++) { 1254 struct net_device *dev = baycom_device[i]; 1255 1256 if (dev) { 1257 struct baycom_state *bc = netdev_priv(dev); 1258 if (bc->magic == BAYCOM_MAGIC) { 1259 unregister_netdev(dev); 1260 free_netdev(dev); 1261 } else 1262 printk(paranoia_str, "cleanup_module"); 1263 } 1264 } 1265 } 1266 1267 module_init(init_baycomepp); 1268 module_exit(cleanup_baycomepp); 1269 1270 /* --------------------------------------------------------------------- */ 1271 1272 #ifndef MODULE 1273 1274 /* 1275 * format: baycom_epp=io,mode 1276 * mode: fpga config options 1277 */ 1278 1279 static int __init baycom_epp_setup(char *str) 1280 { 1281 static unsigned __initdata nr_dev = 0; 1282 int ints[2]; 1283 1284 if (nr_dev >= NR_PORTS) 1285 return 0; 1286 str = get_options(str, 2, ints); 1287 if (ints[0] < 1) 1288 return 0; 1289 mode[nr_dev] = str; 1290 iobase[nr_dev] = ints[1]; 1291 nr_dev++; 1292 return 1; 1293 } 1294 1295 __setup("baycom_epp=", baycom_epp_setup); 1296 1297 #endif /* MODULE */ 1298 /* --------------------------------------------------------------------- */ 1299