baycom_ser_fdx.c revision 7d12e780e003f93433d49ce78cfedf4b4c52adc5
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 contignuous 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/module.h> 75#include <linux/ioport.h> 76#include <linux/string.h> 77#include <linux/init.h> 78#include <asm/uaccess.h> 79#include <asm/io.h> 80#include <linux/hdlcdrv.h> 81#include <linux/baycom.h> 82#include <linux/jiffies.h> 83 84/* --------------------------------------------------------------------- */ 85 86#define BAYCOM_DEBUG 87 88/* --------------------------------------------------------------------- */ 89 90static const char bc_drvname[] = "baycom_ser_fdx"; 91static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n" 92KERN_INFO "baycom_ser_fdx: version 0.10 compiled " __TIME__ " " __DATE__ "\n"; 93 94/* --------------------------------------------------------------------- */ 95 96#define NR_PORTS 4 97 98static struct net_device *baycom_device[NR_PORTS]; 99 100/* --------------------------------------------------------------------- */ 101 102#define RBR(iobase) (iobase+0) 103#define THR(iobase) (iobase+0) 104#define IER(iobase) (iobase+1) 105#define IIR(iobase) (iobase+2) 106#define FCR(iobase) (iobase+2) 107#define LCR(iobase) (iobase+3) 108#define MCR(iobase) (iobase+4) 109#define LSR(iobase) (iobase+5) 110#define MSR(iobase) (iobase+6) 111#define SCR(iobase) (iobase+7) 112#define DLL(iobase) (iobase+0) 113#define DLM(iobase) (iobase+1) 114 115#define SER12_EXTENT 8 116 117/* ---------------------------------------------------------------------- */ 118/* 119 * Information that need to be kept for each board. 120 */ 121 122struct baycom_state { 123 struct hdlcdrv_state hdrv; 124 125 unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout; 126 int opt_dcd; 127 128 struct modem_state { 129 unsigned char flags; 130 unsigned char ptt; 131 unsigned int shreg; 132 struct modem_state_ser12 { 133 unsigned char tx_bit; 134 unsigned char last_rxbit; 135 int dcd_sum0, dcd_sum1, dcd_sum2; 136 int dcd_time; 137 unsigned int pll_time; 138 unsigned int txshreg; 139 } ser12; 140 } modem; 141 142#ifdef BAYCOM_DEBUG 143 struct debug_vals { 144 unsigned long last_jiffies; 145 unsigned cur_intcnt; 146 unsigned last_intcnt; 147 int cur_pllcorr; 148 int last_pllcorr; 149 } debug_vals; 150#endif /* BAYCOM_DEBUG */ 151}; 152 153/* --------------------------------------------------------------------- */ 154 155static inline void baycom_int_freq(struct baycom_state *bc) 156{ 157#ifdef BAYCOM_DEBUG 158 unsigned long cur_jiffies = jiffies; 159 /* 160 * measure the interrupt frequency 161 */ 162 bc->debug_vals.cur_intcnt++; 163 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { 164 bc->debug_vals.last_jiffies = cur_jiffies; 165 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; 166 bc->debug_vals.cur_intcnt = 0; 167 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; 168 bc->debug_vals.cur_pllcorr = 0; 169 } 170#endif /* BAYCOM_DEBUG */ 171} 172 173/* --------------------------------------------------------------------- */ 174/* 175 * ===================== SER12 specific routines ========================= 176 */ 177 178/* --------------------------------------------------------------------- */ 179 180static inline void ser12_set_divisor(struct net_device *dev, 181 unsigned int divisor) 182{ 183 outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */ 184 outb(divisor, DLL(dev->base_addr)); 185 outb(divisor >> 8, DLM(dev->base_addr)); 186 outb(0x01, LCR(dev->base_addr)); /* word length = 6 */ 187 /* 188 * make sure the next interrupt is generated; 189 * 0 must be used to power the modem; the modem draws its 190 * power from the TxD line 191 */ 192 outb(0x00, THR(dev->base_addr)); 193 /* 194 * it is important not to set the divider while transmitting; 195 * this reportedly makes some UARTs generating interrupts 196 * in the hundredthousands per second region 197 * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno) 198 */ 199} 200 201/* --------------------------------------------------------------------- */ 202 203#if 0 204static inline unsigned int hweight16(unsigned int w) 205 __attribute__ ((unused)); 206static inline unsigned int hweight8(unsigned int w) 207 __attribute__ ((unused)); 208 209static inline unsigned int hweight16(unsigned int w) 210{ 211 unsigned short res = (w & 0x5555) + ((w >> 1) & 0x5555); 212 res = (res & 0x3333) + ((res >> 2) & 0x3333); 213 res = (res & 0x0F0F) + ((res >> 4) & 0x0F0F); 214 return (res & 0x00FF) + ((res >> 8) & 0x00FF); 215} 216 217static inline unsigned int hweight8(unsigned int w) 218{ 219 unsigned short res = (w & 0x55) + ((w >> 1) & 0x55); 220 res = (res & 0x33) + ((res >> 2) & 0x33); 221 return (res & 0x0F) + ((res >> 4) & 0x0F); 222} 223#endif 224 225/* --------------------------------------------------------------------- */ 226 227static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timeval *tv, unsigned char curs) 228{ 229 int timediff; 230 int bdus8 = bc->baud_us >> 3; 231 int bdus4 = bc->baud_us >> 2; 232 int bdus2 = bc->baud_us >> 1; 233 234 timediff = 1000000 + tv->tv_usec - bc->modem.ser12.pll_time; 235 while (timediff >= 500000) 236 timediff -= 1000000; 237 while (timediff >= bdus2) { 238 timediff -= bc->baud_us; 239 bc->modem.ser12.pll_time += bc->baud_us; 240 bc->modem.ser12.dcd_time--; 241 /* first check if there is room to add a bit */ 242 if (bc->modem.shreg & 1) { 243 hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff); 244 bc->modem.shreg = 0x10000; 245 } 246 /* add a one bit */ 247 bc->modem.shreg >>= 1; 248 } 249 if (bc->modem.ser12.dcd_time <= 0) { 250 if (!bc->opt_dcd) 251 hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 + 252 bc->modem.ser12.dcd_sum1 + 253 bc->modem.ser12.dcd_sum2) < 0); 254 bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1; 255 bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0; 256 bc->modem.ser12.dcd_sum0 = 2; /* slight bias */ 257 bc->modem.ser12.dcd_time += 120; 258 } 259 if (bc->modem.ser12.last_rxbit != curs) { 260 bc->modem.ser12.last_rxbit = curs; 261 bc->modem.shreg |= 0x10000; 262 /* adjust the PLL */ 263 if (timediff > 0) 264 bc->modem.ser12.pll_time += bdus8; 265 else 266 bc->modem.ser12.pll_time += 1000000 - bdus8; 267 /* update DCD */ 268 if (abs(timediff) > bdus4) 269 bc->modem.ser12.dcd_sum0 += 4; 270 else 271 bc->modem.ser12.dcd_sum0--; 272#ifdef BAYCOM_DEBUG 273 bc->debug_vals.cur_pllcorr = timediff; 274#endif /* BAYCOM_DEBUG */ 275 } 276 while (bc->modem.ser12.pll_time >= 1000000) 277 bc->modem.ser12.pll_time -= 1000000; 278} 279 280/* --------------------------------------------------------------------- */ 281 282static irqreturn_t ser12_interrupt(int irq, void *dev_id) 283{ 284 struct net_device *dev = (struct net_device *)dev_id; 285 struct baycom_state *bc = netdev_priv(dev); 286 struct timeval tv; 287 unsigned char iir, msr; 288 unsigned int txcount = 0; 289 290 if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC) 291 return IRQ_NONE; 292 /* fast way out for shared irq */ 293 if ((iir = inb(IIR(dev->base_addr))) & 1) 294 return IRQ_NONE; 295 /* get current time */ 296 do_gettimeofday(&tv); 297 msr = inb(MSR(dev->base_addr)); 298 /* delta DCD */ 299 if ((msr & 8) && bc->opt_dcd) 300 hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); 301 do { 302 switch (iir & 6) { 303 case 6: 304 inb(LSR(dev->base_addr)); 305 break; 306 307 case 4: 308 inb(RBR(dev->base_addr)); 309 break; 310 311 case 2: 312 /* 313 * make sure the next interrupt is generated; 314 * 0 must be used to power the modem; the modem draws its 315 * power from the TxD line 316 */ 317 outb(0x00, THR(dev->base_addr)); 318 baycom_int_freq(bc); 319 txcount++; 320 /* 321 * first output the last bit (!) then call HDLC transmitter, 322 * since this may take quite long 323 */ 324 if (bc->modem.ptt) 325 outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr)); 326 else 327 outb(0x0d, MCR(dev->base_addr)); /* transmitter off */ 328 break; 329 330 default: 331 msr = inb(MSR(dev->base_addr)); 332 /* delta DCD */ 333 if ((msr & 8) && bc->opt_dcd) 334 hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); 335 break; 336 } 337 iir = inb(IIR(dev->base_addr)); 338 } while (!(iir & 1)); 339 ser12_rx(dev, bc, &tv, msr & 0x10); /* CTS */ 340 if (bc->modem.ptt && txcount) { 341 if (bc->modem.ser12.txshreg <= 1) { 342 bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv); 343 if (!hdlcdrv_ptt(&bc->hdrv)) { 344 ser12_set_divisor(dev, 115200/100/8); 345 bc->modem.ptt = 0; 346 goto end_transmit; 347 } 348 } 349 bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1)); 350 bc->modem.ser12.txshreg >>= 1; 351 } 352 end_transmit: 353 local_irq_enable(); 354 if (!bc->modem.ptt && txcount) { 355 hdlcdrv_arbitrate(dev, &bc->hdrv); 356 if (hdlcdrv_ptt(&bc->hdrv)) { 357 ser12_set_divisor(dev, bc->baud_uartdiv); 358 bc->modem.ser12.txshreg = 1; 359 bc->modem.ptt = 1; 360 } 361 } 362 hdlcdrv_transmitter(dev, &bc->hdrv); 363 hdlcdrv_receiver(dev, &bc->hdrv); 364 local_irq_disable(); 365 return IRQ_HANDLED; 366} 367 368/* --------------------------------------------------------------------- */ 369 370enum uart { c_uart_unknown, c_uart_8250, 371 c_uart_16450, c_uart_16550, c_uart_16550A}; 372static const char *uart_str[] = { 373 "unknown", "8250", "16450", "16550", "16550A" 374}; 375 376static enum uart ser12_check_uart(unsigned int iobase) 377{ 378 unsigned char b1,b2,b3; 379 enum uart u; 380 enum uart uart_tab[] = 381 { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A }; 382 383 b1 = inb(MCR(iobase)); 384 outb(b1 | 0x10, MCR(iobase)); /* loopback mode */ 385 b2 = inb(MSR(iobase)); 386 outb(0x1a, MCR(iobase)); 387 b3 = inb(MSR(iobase)) & 0xf0; 388 outb(b1, MCR(iobase)); /* restore old values */ 389 outb(b2, MSR(iobase)); 390 if (b3 != 0x90) 391 return c_uart_unknown; 392 inb(RBR(iobase)); 393 inb(RBR(iobase)); 394 outb(0x01, FCR(iobase)); /* enable FIFOs */ 395 u = uart_tab[(inb(IIR(iobase)) >> 6) & 3]; 396 if (u == c_uart_16450) { 397 outb(0x5a, SCR(iobase)); 398 b1 = inb(SCR(iobase)); 399 outb(0xa5, SCR(iobase)); 400 b2 = inb(SCR(iobase)); 401 if ((b1 != 0x5a) || (b2 != 0xa5)) 402 u = c_uart_8250; 403 } 404 return u; 405} 406 407/* --------------------------------------------------------------------- */ 408 409static int ser12_open(struct net_device *dev) 410{ 411 struct baycom_state *bc = netdev_priv(dev); 412 enum uart u; 413 414 if (!dev || !bc) 415 return -ENXIO; 416 if (!dev->base_addr || dev->base_addr > 0x1000-SER12_EXTENT || 417 dev->irq < 2 || dev->irq > 15) 418 return -ENXIO; 419 if (bc->baud < 300 || bc->baud > 4800) 420 return -EINVAL; 421 if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) { 422 printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy \n", 423 dev->base_addr); 424 return -EACCES; 425 } 426 memset(&bc->modem, 0, sizeof(bc->modem)); 427 bc->hdrv.par.bitrate = bc->baud; 428 bc->baud_us = 1000000/bc->baud; 429 bc->baud_uartdiv = (115200/8)/bc->baud; 430 if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown){ 431 release_region(dev->base_addr, SER12_EXTENT); 432 return -EIO; 433 } 434 outb(0, FCR(dev->base_addr)); /* disable FIFOs */ 435 outb(0x0d, MCR(dev->base_addr)); 436 outb(0, IER(dev->base_addr)); 437 if (request_irq(dev->irq, ser12_interrupt, IRQF_DISABLED | IRQF_SHARED, 438 "baycom_ser_fdx", dev)) { 439 release_region(dev->base_addr, SER12_EXTENT); 440 return -EBUSY; 441 } 442 /* 443 * set the SIO to 6 Bits/character; during receive, 444 * the baud rate is set to produce 100 ints/sec 445 * to feed the channel arbitration process, 446 * during transmit to baud ints/sec to run 447 * the transmitter 448 */ 449 ser12_set_divisor(dev, 115200/100/8); 450 /* 451 * enable transmitter empty interrupt and modem status interrupt 452 */ 453 outb(0x0a, IER(dev->base_addr)); 454 /* 455 * make sure the next interrupt is generated; 456 * 0 must be used to power the modem; the modem draws its 457 * power from the TxD line 458 */ 459 outb(0x00, THR(dev->base_addr)); 460 hdlcdrv_setdcd(&bc->hdrv, 0); 461 printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %s\n", 462 bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]); 463 return 0; 464} 465 466/* --------------------------------------------------------------------- */ 467 468static int ser12_close(struct net_device *dev) 469{ 470 struct baycom_state *bc = netdev_priv(dev); 471 472 if (!dev || !bc) 473 return -EINVAL; 474 /* 475 * disable interrupts 476 */ 477 outb(0, IER(dev->base_addr)); 478 outb(1, MCR(dev->base_addr)); 479 free_irq(dev->irq, dev); 480 release_region(dev->base_addr, SER12_EXTENT); 481 printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n", 482 bc_drvname, dev->base_addr, dev->irq); 483 return 0; 484} 485 486/* --------------------------------------------------------------------- */ 487/* 488 * ===================== hdlcdrv driver interface ========================= 489 */ 490 491/* --------------------------------------------------------------------- */ 492 493static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, 494 struct hdlcdrv_ioctl *hi, int cmd); 495 496/* --------------------------------------------------------------------- */ 497 498static struct hdlcdrv_ops ser12_ops = { 499 .drvname = bc_drvname, 500 .drvinfo = bc_drvinfo, 501 .open = ser12_open, 502 .close = ser12_close, 503 .ioctl = baycom_ioctl, 504}; 505 506/* --------------------------------------------------------------------- */ 507 508static int baycom_setmode(struct baycom_state *bc, const char *modestr) 509{ 510 unsigned int baud; 511 512 if (!strncmp(modestr, "ser", 3)) { 513 baud = simple_strtoul(modestr+3, NULL, 10); 514 if (baud >= 3 && baud <= 48) 515 bc->baud = baud*100; 516 } 517 if (strchr(modestr, '*')) 518 bc->opt_dcd = 0; 519 else if (strchr(modestr, '+')) 520 bc->opt_dcd = -1; 521 else 522 bc->opt_dcd = 1; 523 return 0; 524} 525 526/* --------------------------------------------------------------------- */ 527 528static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, 529 struct hdlcdrv_ioctl *hi, int cmd) 530{ 531 struct baycom_state *bc; 532 struct baycom_ioctl bi; 533 534 if (!dev) 535 return -EINVAL; 536 537 bc = netdev_priv(dev); 538 BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC); 539 540 if (cmd != SIOCDEVPRIVATE) 541 return -ENOIOCTLCMD; 542 switch (hi->cmd) { 543 default: 544 break; 545 546 case HDLCDRVCTL_GETMODE: 547 sprintf(hi->data.modename, "ser%u", bc->baud / 100); 548 if (bc->opt_dcd <= 0) 549 strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+"); 550 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) 551 return -EFAULT; 552 return 0; 553 554 case HDLCDRVCTL_SETMODE: 555 if (netif_running(dev) || !capable(CAP_NET_ADMIN)) 556 return -EACCES; 557 hi->data.modename[sizeof(hi->data.modename)-1] = '\0'; 558 return baycom_setmode(bc, hi->data.modename); 559 560 case HDLCDRVCTL_MODELIST: 561 strcpy(hi->data.modename, "ser12,ser3,ser24"); 562 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) 563 return -EFAULT; 564 return 0; 565 566 case HDLCDRVCTL_MODEMPARMASK: 567 return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ; 568 569 } 570 571 if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi))) 572 return -EFAULT; 573 switch (bi.cmd) { 574 default: 575 return -ENOIOCTLCMD; 576 577#ifdef BAYCOM_DEBUG 578 case BAYCOMCTL_GETDEBUG: 579 bi.data.dbg.debug1 = bc->hdrv.ptt_keyed; 580 bi.data.dbg.debug2 = bc->debug_vals.last_intcnt; 581 bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr; 582 break; 583#endif /* BAYCOM_DEBUG */ 584 585 } 586 if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi))) 587 return -EFAULT; 588 return 0; 589 590} 591 592/* --------------------------------------------------------------------- */ 593 594/* 595 * command line settable parameters 596 */ 597static char *mode[NR_PORTS] = { "ser12*", }; 598static int iobase[NR_PORTS] = { 0x3f8, }; 599static int irq[NR_PORTS] = { 4, }; 600static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 }; 601 602module_param_array(mode, charp, NULL, 0); 603MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD"); 604module_param_array(iobase, int, NULL, 0); 605MODULE_PARM_DESC(iobase, "baycom io base address"); 606module_param_array(irq, int, NULL, 0); 607MODULE_PARM_DESC(irq, "baycom irq number"); 608module_param_array(baud, int, NULL, 0); 609MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)"); 610 611MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); 612MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver"); 613MODULE_LICENSE("GPL"); 614 615/* --------------------------------------------------------------------- */ 616 617static int __init init_baycomserfdx(void) 618{ 619 int i, found = 0; 620 char set_hw = 1; 621 622 printk(bc_drvinfo); 623 /* 624 * register net devices 625 */ 626 for (i = 0; i < NR_PORTS; i++) { 627 struct net_device *dev; 628 struct baycom_state *bc; 629 char ifname[IFNAMSIZ]; 630 631 sprintf(ifname, "bcsf%d", i); 632 633 if (!mode[i]) 634 set_hw = 0; 635 if (!set_hw) 636 iobase[i] = irq[i] = 0; 637 638 dev = hdlcdrv_register(&ser12_ops, 639 sizeof(struct baycom_state), 640 ifname, iobase[i], irq[i], 0); 641 if (IS_ERR(dev)) 642 break; 643 644 bc = netdev_priv(dev); 645 if (set_hw && baycom_setmode(bc, mode[i])) 646 set_hw = 0; 647 bc->baud = baud[i]; 648 found++; 649 baycom_device[i] = dev; 650 } 651 652 if (!found) 653 return -ENXIO; 654 return 0; 655} 656 657static void __exit cleanup_baycomserfdx(void) 658{ 659 int i; 660 661 for(i = 0; i < NR_PORTS; i++) { 662 struct net_device *dev = baycom_device[i]; 663 if (dev) 664 hdlcdrv_unregister(dev); 665 } 666} 667 668module_init(init_baycomserfdx); 669module_exit(cleanup_baycomserfdx); 670 671/* --------------------------------------------------------------------- */ 672 673#ifndef MODULE 674 675/* 676 * format: baycom_ser_fdx=io,irq,mode 677 * mode: ser# hardware DCD 678 * ser#* software DCD 679 * ser#+ hardware DCD, inverted signal at DCD pin 680 * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' 681 */ 682 683static int __init baycom_ser_fdx_setup(char *str) 684{ 685 static unsigned nr_dev; 686 int ints[4]; 687 688 if (nr_dev >= NR_PORTS) 689 return 0; 690 str = get_options(str, 4, ints); 691 if (ints[0] < 2) 692 return 0; 693 mode[nr_dev] = str; 694 iobase[nr_dev] = ints[1]; 695 irq[nr_dev] = ints[2]; 696 if (ints[0] >= 3) 697 baud[nr_dev] = ints[3]; 698 nr_dev++; 699 return 1; 700} 701 702__setup("baycom_ser_fdx=", baycom_ser_fdx_setup); 703 704#endif /* MODULE */ 705/* --------------------------------------------------------------------- */ 706