1/*****************************************************************************/ 2 3/* 4 * baycom_ser_fdx.c -- baycom ser12 fullduplex radio modem driver. 5 * 6 * Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * 22 * Please note that the GPL allows you to use the driver, NOT the radio. 23 * In order to use the radio, you need a license from the communications 24 * authority of your country. 25 * 26 * 27 * Supported modems 28 * 29 * ser12: This is a very simple 1200 baud AFSK modem. The modem consists only 30 * of a modulator/demodulator chip, usually a TI TCM3105. The computer 31 * is responsible for regenerating the receiver bit clock, as well as 32 * for handling the HDLC protocol. The modem connects to a serial port, 33 * hence the name. Since the serial port is not used as an async serial 34 * port, the kernel driver for serial ports cannot be used, and this 35 * driver only supports standard serial hardware (8250, 16450, 16550A) 36 * 37 * This modem usually draws its supply current out of the otherwise unused 38 * TXD pin of the serial port. Thus a contiguous stream of 0x00-bytes 39 * is transmitted to achieve a positive supply voltage. 40 * 41 * hsk: This is a 4800 baud FSK modem, designed for TNC use. It works fine 42 * in 'baycom-mode' :-) In contrast to the TCM3105 modem, power is 43 * externally supplied. So there's no need to provide the 0x00-byte-stream 44 * when receiving or idle, which drastically reduces interrupt load. 45 * 46 * Command line options (insmod command line) 47 * 48 * mode ser# hardware DCD 49 * ser#* software DCD 50 * ser#+ hardware DCD, inverted signal at DCD pin 51 * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' 52 * iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8 53 * baud baud rate (between 300 and 4800) 54 * irq interrupt line of the port; common values are 4,3 55 * 56 * 57 * History: 58 * 0.1 26.06.1996 Adapted from baycom.c and made network driver interface 59 * 18.10.1996 Changed to new user space access routines (copy_{to,from}_user) 60 * 0.3 26.04.1997 init code/data tagged 61 * 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints) 62 * 0.5 11.11.1997 ser12/par96 split into separate files 63 * 0.6 24.01.1998 Thorsten Kranzkowski, dl8bcu and Thomas Sailer: 64 * reduced interrupt load in transmit case 65 * reworked receiver 66 * 0.7 03.08.1999 adapt to Linus' new __setup/__initcall 67 * 0.8 10.08.1999 use module_init/module_exit 68 * 0.9 12.02.2000 adapted to softnet driver interface 69 * 0.10 03.07.2000 fix interface name handling 70 */ 71 72/*****************************************************************************/ 73 74#include <linux/capability.h> 75#include <linux/module.h> 76#include <linux/ioport.h> 77#include <linux/string.h> 78#include <linux/init.h> 79#include <linux/hdlcdrv.h> 80#include <linux/baycom.h> 81#include <linux/jiffies.h> 82 83#include <asm/uaccess.h> 84#include <asm/io.h> 85#include <asm/irq.h> 86 87/* --------------------------------------------------------------------- */ 88 89#define BAYCOM_DEBUG 90 91/* --------------------------------------------------------------------- */ 92 93static const char bc_drvname[] = "baycom_ser_fdx"; 94static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n" 95"baycom_ser_fdx: version 0.10 compiled " __TIME__ " " __DATE__ "\n"; 96 97/* --------------------------------------------------------------------- */ 98 99#define NR_PORTS 4 100 101static struct net_device *baycom_device[NR_PORTS]; 102 103/* --------------------------------------------------------------------- */ 104 105#define RBR(iobase) (iobase+0) 106#define THR(iobase) (iobase+0) 107#define IER(iobase) (iobase+1) 108#define IIR(iobase) (iobase+2) 109#define FCR(iobase) (iobase+2) 110#define LCR(iobase) (iobase+3) 111#define MCR(iobase) (iobase+4) 112#define LSR(iobase) (iobase+5) 113#define MSR(iobase) (iobase+6) 114#define SCR(iobase) (iobase+7) 115#define DLL(iobase) (iobase+0) 116#define DLM(iobase) (iobase+1) 117 118#define SER12_EXTENT 8 119 120/* ---------------------------------------------------------------------- */ 121/* 122 * Information that need to be kept for each board. 123 */ 124 125struct baycom_state { 126 struct hdlcdrv_state hdrv; 127 128 unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout; 129 int opt_dcd; 130 131 struct modem_state { 132 unsigned char flags; 133 unsigned char ptt; 134 unsigned int shreg; 135 struct modem_state_ser12 { 136 unsigned char tx_bit; 137 unsigned char last_rxbit; 138 int dcd_sum0, dcd_sum1, dcd_sum2; 139 int dcd_time; 140 unsigned int pll_time; 141 unsigned int txshreg; 142 } ser12; 143 } modem; 144 145#ifdef BAYCOM_DEBUG 146 struct debug_vals { 147 unsigned long last_jiffies; 148 unsigned cur_intcnt; 149 unsigned last_intcnt; 150 int cur_pllcorr; 151 int last_pllcorr; 152 } debug_vals; 153#endif /* BAYCOM_DEBUG */ 154}; 155 156/* --------------------------------------------------------------------- */ 157 158static inline void baycom_int_freq(struct baycom_state *bc) 159{ 160#ifdef BAYCOM_DEBUG 161 unsigned long cur_jiffies = jiffies; 162 /* 163 * measure the interrupt frequency 164 */ 165 bc->debug_vals.cur_intcnt++; 166 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { 167 bc->debug_vals.last_jiffies = cur_jiffies; 168 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; 169 bc->debug_vals.cur_intcnt = 0; 170 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; 171 bc->debug_vals.cur_pllcorr = 0; 172 } 173#endif /* BAYCOM_DEBUG */ 174} 175 176/* --------------------------------------------------------------------- */ 177/* 178 * ===================== SER12 specific routines ========================= 179 */ 180 181/* --------------------------------------------------------------------- */ 182 183static inline void ser12_set_divisor(struct net_device *dev, 184 unsigned int divisor) 185{ 186 outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */ 187 outb(divisor, DLL(dev->base_addr)); 188 outb(divisor >> 8, DLM(dev->base_addr)); 189 outb(0x01, LCR(dev->base_addr)); /* word length = 6 */ 190 /* 191 * make sure the next interrupt is generated; 192 * 0 must be used to power the modem; the modem draws its 193 * power from the TxD line 194 */ 195 outb(0x00, THR(dev->base_addr)); 196 /* 197 * it is important not to set the divider while transmitting; 198 * this reportedly makes some UARTs generating interrupts 199 * in the hundredthousands per second region 200 * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno) 201 */ 202} 203 204/* --------------------------------------------------------------------- */ 205 206 207/* --------------------------------------------------------------------- */ 208 209static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timeval *tv, unsigned char curs) 210{ 211 int timediff; 212 int bdus8 = bc->baud_us >> 3; 213 int bdus4 = bc->baud_us >> 2; 214 int bdus2 = bc->baud_us >> 1; 215 216 timediff = 1000000 + tv->tv_usec - bc->modem.ser12.pll_time; 217 while (timediff >= 500000) 218 timediff -= 1000000; 219 while (timediff >= bdus2) { 220 timediff -= bc->baud_us; 221 bc->modem.ser12.pll_time += bc->baud_us; 222 bc->modem.ser12.dcd_time--; 223 /* first check if there is room to add a bit */ 224 if (bc->modem.shreg & 1) { 225 hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff); 226 bc->modem.shreg = 0x10000; 227 } 228 /* add a one bit */ 229 bc->modem.shreg >>= 1; 230 } 231 if (bc->modem.ser12.dcd_time <= 0) { 232 if (!bc->opt_dcd) 233 hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 + 234 bc->modem.ser12.dcd_sum1 + 235 bc->modem.ser12.dcd_sum2) < 0); 236 bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1; 237 bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0; 238 bc->modem.ser12.dcd_sum0 = 2; /* slight bias */ 239 bc->modem.ser12.dcd_time += 120; 240 } 241 if (bc->modem.ser12.last_rxbit != curs) { 242 bc->modem.ser12.last_rxbit = curs; 243 bc->modem.shreg |= 0x10000; 244 /* adjust the PLL */ 245 if (timediff > 0) 246 bc->modem.ser12.pll_time += bdus8; 247 else 248 bc->modem.ser12.pll_time += 1000000 - bdus8; 249 /* update DCD */ 250 if (abs(timediff) > bdus4) 251 bc->modem.ser12.dcd_sum0 += 4; 252 else 253 bc->modem.ser12.dcd_sum0--; 254#ifdef BAYCOM_DEBUG 255 bc->debug_vals.cur_pllcorr = timediff; 256#endif /* BAYCOM_DEBUG */ 257 } 258 while (bc->modem.ser12.pll_time >= 1000000) 259 bc->modem.ser12.pll_time -= 1000000; 260} 261 262/* --------------------------------------------------------------------- */ 263 264static irqreturn_t ser12_interrupt(int irq, void *dev_id) 265{ 266 struct net_device *dev = (struct net_device *)dev_id; 267 struct baycom_state *bc = netdev_priv(dev); 268 struct timeval tv; 269 unsigned char iir, msr; 270 unsigned int txcount = 0; 271 272 if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC) 273 return IRQ_NONE; 274 /* fast way out for shared irq */ 275 if ((iir = inb(IIR(dev->base_addr))) & 1) 276 return IRQ_NONE; 277 /* get current time */ 278 do_gettimeofday(&tv); 279 msr = inb(MSR(dev->base_addr)); 280 /* delta DCD */ 281 if ((msr & 8) && bc->opt_dcd) 282 hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); 283 do { 284 switch (iir & 6) { 285 case 6: 286 inb(LSR(dev->base_addr)); 287 break; 288 289 case 4: 290 inb(RBR(dev->base_addr)); 291 break; 292 293 case 2: 294 /* 295 * make sure the next interrupt is generated; 296 * 0 must be used to power the modem; the modem draws its 297 * power from the TxD line 298 */ 299 outb(0x00, THR(dev->base_addr)); 300 baycom_int_freq(bc); 301 txcount++; 302 /* 303 * first output the last bit (!) then call HDLC transmitter, 304 * since this may take quite long 305 */ 306 if (bc->modem.ptt) 307 outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr)); 308 else 309 outb(0x0d, MCR(dev->base_addr)); /* transmitter off */ 310 break; 311 312 default: 313 msr = inb(MSR(dev->base_addr)); 314 /* delta DCD */ 315 if ((msr & 8) && bc->opt_dcd) 316 hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); 317 break; 318 } 319 iir = inb(IIR(dev->base_addr)); 320 } while (!(iir & 1)); 321 ser12_rx(dev, bc, &tv, msr & 0x10); /* CTS */ 322 if (bc->modem.ptt && txcount) { 323 if (bc->modem.ser12.txshreg <= 1) { 324 bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv); 325 if (!hdlcdrv_ptt(&bc->hdrv)) { 326 ser12_set_divisor(dev, 115200/100/8); 327 bc->modem.ptt = 0; 328 goto end_transmit; 329 } 330 } 331 bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1)); 332 bc->modem.ser12.txshreg >>= 1; 333 } 334 end_transmit: 335 local_irq_enable(); 336 if (!bc->modem.ptt && txcount) { 337 hdlcdrv_arbitrate(dev, &bc->hdrv); 338 if (hdlcdrv_ptt(&bc->hdrv)) { 339 ser12_set_divisor(dev, bc->baud_uartdiv); 340 bc->modem.ser12.txshreg = 1; 341 bc->modem.ptt = 1; 342 } 343 } 344 hdlcdrv_transmitter(dev, &bc->hdrv); 345 hdlcdrv_receiver(dev, &bc->hdrv); 346 local_irq_disable(); 347 return IRQ_HANDLED; 348} 349 350/* --------------------------------------------------------------------- */ 351 352enum uart { c_uart_unknown, c_uart_8250, 353 c_uart_16450, c_uart_16550, c_uart_16550A}; 354static const char *uart_str[] = { 355 "unknown", "8250", "16450", "16550", "16550A" 356}; 357 358static enum uart ser12_check_uart(unsigned int iobase) 359{ 360 unsigned char b1,b2,b3; 361 enum uart u; 362 enum uart uart_tab[] = 363 { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A }; 364 365 b1 = inb(MCR(iobase)); 366 outb(b1 | 0x10, MCR(iobase)); /* loopback mode */ 367 b2 = inb(MSR(iobase)); 368 outb(0x1a, MCR(iobase)); 369 b3 = inb(MSR(iobase)) & 0xf0; 370 outb(b1, MCR(iobase)); /* restore old values */ 371 outb(b2, MSR(iobase)); 372 if (b3 != 0x90) 373 return c_uart_unknown; 374 inb(RBR(iobase)); 375 inb(RBR(iobase)); 376 outb(0x01, FCR(iobase)); /* enable FIFOs */ 377 u = uart_tab[(inb(IIR(iobase)) >> 6) & 3]; 378 if (u == c_uart_16450) { 379 outb(0x5a, SCR(iobase)); 380 b1 = inb(SCR(iobase)); 381 outb(0xa5, SCR(iobase)); 382 b2 = inb(SCR(iobase)); 383 if ((b1 != 0x5a) || (b2 != 0xa5)) 384 u = c_uart_8250; 385 } 386 return u; 387} 388 389/* --------------------------------------------------------------------- */ 390 391static int ser12_open(struct net_device *dev) 392{ 393 struct baycom_state *bc = netdev_priv(dev); 394 enum uart u; 395 396 if (!dev || !bc) 397 return -ENXIO; 398 if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT || 399 dev->irq < 2 || dev->irq > nr_irqs) { 400 printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) " 401 "or irq (2 <= irq <= %d)\n", 402 0xffff-SER12_EXTENT, nr_irqs); 403 return -ENXIO; 404 } 405 if (bc->baud < 300 || bc->baud > 4800) { 406 printk(KERN_INFO "baycom_ser_fdx: invalid baudrate " 407 "(300...4800)\n"); 408 return -EINVAL; 409 } 410 if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) { 411 printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy\n", 412 dev->base_addr); 413 return -EACCES; 414 } 415 memset(&bc->modem, 0, sizeof(bc->modem)); 416 bc->hdrv.par.bitrate = bc->baud; 417 bc->baud_us = 1000000/bc->baud; 418 bc->baud_uartdiv = (115200/8)/bc->baud; 419 if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown){ 420 release_region(dev->base_addr, SER12_EXTENT); 421 return -EIO; 422 } 423 outb(0, FCR(dev->base_addr)); /* disable FIFOs */ 424 outb(0x0d, MCR(dev->base_addr)); 425 outb(0, IER(dev->base_addr)); 426 if (request_irq(dev->irq, ser12_interrupt, IRQF_DISABLED | IRQF_SHARED, 427 "baycom_ser_fdx", dev)) { 428 release_region(dev->base_addr, SER12_EXTENT); 429 return -EBUSY; 430 } 431 /* 432 * set the SIO to 6 Bits/character; during receive, 433 * the baud rate is set to produce 100 ints/sec 434 * to feed the channel arbitration process, 435 * during transmit to baud ints/sec to run 436 * the transmitter 437 */ 438 ser12_set_divisor(dev, 115200/100/8); 439 /* 440 * enable transmitter empty interrupt and modem status interrupt 441 */ 442 outb(0x0a, IER(dev->base_addr)); 443 /* 444 * make sure the next interrupt is generated; 445 * 0 must be used to power the modem; the modem draws its 446 * power from the TxD line 447 */ 448 outb(0x00, THR(dev->base_addr)); 449 hdlcdrv_setdcd(&bc->hdrv, 0); 450 printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %s\n", 451 bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]); 452 return 0; 453} 454 455/* --------------------------------------------------------------------- */ 456 457static int ser12_close(struct net_device *dev) 458{ 459 struct baycom_state *bc = netdev_priv(dev); 460 461 if (!dev || !bc) 462 return -EINVAL; 463 /* 464 * disable interrupts 465 */ 466 outb(0, IER(dev->base_addr)); 467 outb(1, MCR(dev->base_addr)); 468 free_irq(dev->irq, dev); 469 release_region(dev->base_addr, SER12_EXTENT); 470 printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n", 471 bc_drvname, dev->base_addr, dev->irq); 472 return 0; 473} 474 475/* --------------------------------------------------------------------- */ 476/* 477 * ===================== hdlcdrv driver interface ========================= 478 */ 479 480/* --------------------------------------------------------------------- */ 481 482static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, 483 struct hdlcdrv_ioctl *hi, int cmd); 484 485/* --------------------------------------------------------------------- */ 486 487static struct hdlcdrv_ops ser12_ops = { 488 .drvname = bc_drvname, 489 .drvinfo = bc_drvinfo, 490 .open = ser12_open, 491 .close = ser12_close, 492 .ioctl = baycom_ioctl, 493}; 494 495/* --------------------------------------------------------------------- */ 496 497static int baycom_setmode(struct baycom_state *bc, const char *modestr) 498{ 499 unsigned int baud; 500 501 if (!strncmp(modestr, "ser", 3)) { 502 baud = simple_strtoul(modestr+3, NULL, 10); 503 if (baud >= 3 && baud <= 48) 504 bc->baud = baud*100; 505 } 506 if (strchr(modestr, '*')) 507 bc->opt_dcd = 0; 508 else if (strchr(modestr, '+')) 509 bc->opt_dcd = -1; 510 else 511 bc->opt_dcd = 1; 512 return 0; 513} 514 515/* --------------------------------------------------------------------- */ 516 517static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, 518 struct hdlcdrv_ioctl *hi, int cmd) 519{ 520 struct baycom_state *bc; 521 struct baycom_ioctl bi; 522 523 if (!dev) 524 return -EINVAL; 525 526 bc = netdev_priv(dev); 527 BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC); 528 529 if (cmd != SIOCDEVPRIVATE) 530 return -ENOIOCTLCMD; 531 switch (hi->cmd) { 532 default: 533 break; 534 535 case HDLCDRVCTL_GETMODE: 536 sprintf(hi->data.modename, "ser%u", bc->baud / 100); 537 if (bc->opt_dcd <= 0) 538 strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+"); 539 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) 540 return -EFAULT; 541 return 0; 542 543 case HDLCDRVCTL_SETMODE: 544 if (netif_running(dev) || !capable(CAP_NET_ADMIN)) 545 return -EACCES; 546 hi->data.modename[sizeof(hi->data.modename)-1] = '\0'; 547 return baycom_setmode(bc, hi->data.modename); 548 549 case HDLCDRVCTL_MODELIST: 550 strcpy(hi->data.modename, "ser12,ser3,ser24"); 551 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) 552 return -EFAULT; 553 return 0; 554 555 case HDLCDRVCTL_MODEMPARMASK: 556 return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ; 557 558 } 559 560 if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi))) 561 return -EFAULT; 562 switch (bi.cmd) { 563 default: 564 return -ENOIOCTLCMD; 565 566#ifdef BAYCOM_DEBUG 567 case BAYCOMCTL_GETDEBUG: 568 bi.data.dbg.debug1 = bc->hdrv.ptt_keyed; 569 bi.data.dbg.debug2 = bc->debug_vals.last_intcnt; 570 bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr; 571 break; 572#endif /* BAYCOM_DEBUG */ 573 574 } 575 if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi))) 576 return -EFAULT; 577 return 0; 578 579} 580 581/* --------------------------------------------------------------------- */ 582 583/* 584 * command line settable parameters 585 */ 586static char *mode[NR_PORTS] = { "ser12*", }; 587static int iobase[NR_PORTS] = { 0x3f8, }; 588static int irq[NR_PORTS] = { 4, }; 589static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 }; 590 591module_param_array(mode, charp, NULL, 0); 592MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD"); 593module_param_array(iobase, int, NULL, 0); 594MODULE_PARM_DESC(iobase, "baycom io base address"); 595module_param_array(irq, int, NULL, 0); 596MODULE_PARM_DESC(irq, "baycom irq number"); 597module_param_array(baud, int, NULL, 0); 598MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)"); 599 600MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); 601MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver"); 602MODULE_LICENSE("GPL"); 603 604/* --------------------------------------------------------------------- */ 605 606static int __init init_baycomserfdx(void) 607{ 608 int i, found = 0; 609 char set_hw = 1; 610 611 printk(bc_drvinfo); 612 /* 613 * register net devices 614 */ 615 for (i = 0; i < NR_PORTS; i++) { 616 struct net_device *dev; 617 struct baycom_state *bc; 618 char ifname[IFNAMSIZ]; 619 620 sprintf(ifname, "bcsf%d", i); 621 622 if (!mode[i]) 623 set_hw = 0; 624 if (!set_hw) 625 iobase[i] = irq[i] = 0; 626 627 dev = hdlcdrv_register(&ser12_ops, 628 sizeof(struct baycom_state), 629 ifname, iobase[i], irq[i], 0); 630 if (IS_ERR(dev)) 631 break; 632 633 bc = netdev_priv(dev); 634 if (set_hw && baycom_setmode(bc, mode[i])) 635 set_hw = 0; 636 bc->baud = baud[i]; 637 found++; 638 baycom_device[i] = dev; 639 } 640 641 if (!found) 642 return -ENXIO; 643 return 0; 644} 645 646static void __exit cleanup_baycomserfdx(void) 647{ 648 int i; 649 650 for(i = 0; i < NR_PORTS; i++) { 651 struct net_device *dev = baycom_device[i]; 652 if (dev) 653 hdlcdrv_unregister(dev); 654 } 655} 656 657module_init(init_baycomserfdx); 658module_exit(cleanup_baycomserfdx); 659 660/* --------------------------------------------------------------------- */ 661 662#ifndef MODULE 663 664/* 665 * format: baycom_ser_fdx=io,irq,mode 666 * mode: ser# hardware DCD 667 * ser#* software DCD 668 * ser#+ hardware DCD, inverted signal at DCD pin 669 * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' 670 */ 671 672static int __init baycom_ser_fdx_setup(char *str) 673{ 674 static unsigned nr_dev; 675 int ints[4]; 676 677 if (nr_dev >= NR_PORTS) 678 return 0; 679 str = get_options(str, 4, ints); 680 if (ints[0] < 2) 681 return 0; 682 mode[nr_dev] = str; 683 iobase[nr_dev] = ints[1]; 684 irq[nr_dev] = ints[2]; 685 if (ints[0] >= 3) 686 baud[nr_dev] = ints[3]; 687 nr_dev++; 688 return 1; 689} 690 691__setup("baycom_ser_fdx=", baycom_ser_fdx_setup); 692 693#endif /* MODULE */ 694/* --------------------------------------------------------------------- */ 695