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 <linux/hdlcdrv.h> 79 #include <linux/baycom.h> 80 #include <linux/jiffies.h> 81 82 #include <asm/uaccess.h> 83 #include <asm/io.h> 84 #include <asm/irq.h> 85 86 /* --------------------------------------------------------------------- */ 87 88 #define BAYCOM_DEBUG 89 90 /* --------------------------------------------------------------------- */ 91 92 static const char bc_drvname[] = "baycom_ser_fdx"; 93 static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n" 94 KERN_INFO "baycom_ser_fdx: version 0.10 compiled " __TIME__ " " __DATE__ "\n"; 95 96 /* --------------------------------------------------------------------- */ 97 98 #define NR_PORTS 4 99 100 static struct net_device *baycom_device[NR_PORTS]; 101 102 /* --------------------------------------------------------------------- */ 103 104 #define RBR(iobase) (iobase+0) 105 #define THR(iobase) (iobase+0) 106 #define IER(iobase) (iobase+1) 107 #define IIR(iobase) (iobase+2) 108 #define FCR(iobase) (iobase+2) 109 #define LCR(iobase) (iobase+3) 110 #define MCR(iobase) (iobase+4) 111 #define LSR(iobase) (iobase+5) 112 #define MSR(iobase) (iobase+6) 113 #define SCR(iobase) (iobase+7) 114 #define DLL(iobase) (iobase+0) 115 #define DLM(iobase) (iobase+1) 116 117 #define SER12_EXTENT 8 118 119 /* ---------------------------------------------------------------------- */ 120 /* 121 * Information that need to be kept for each board. 122 */ 123 124 struct baycom_state { 125 struct hdlcdrv_state hdrv; 126 127 unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout; 128 int opt_dcd; 129 130 struct modem_state { 131 unsigned char flags; 132 unsigned char ptt; 133 unsigned int shreg; 134 struct modem_state_ser12 { 135 unsigned char tx_bit; 136 unsigned char last_rxbit; 137 int dcd_sum0, dcd_sum1, dcd_sum2; 138 int dcd_time; 139 unsigned int pll_time; 140 unsigned int txshreg; 141 } ser12; 142 } modem; 143 144 #ifdef BAYCOM_DEBUG 145 struct debug_vals { 146 unsigned long last_jiffies; 147 unsigned cur_intcnt; 148 unsigned last_intcnt; 149 int cur_pllcorr; 150 int last_pllcorr; 151 } debug_vals; 152 #endif /* BAYCOM_DEBUG */ 153 }; 154 155 /* --------------------------------------------------------------------- */ 156 157 static inline void baycom_int_freq(struct baycom_state *bc) 158 { 159 #ifdef BAYCOM_DEBUG 160 unsigned long cur_jiffies = jiffies; 161 /* 162 * measure the interrupt frequency 163 */ 164 bc->debug_vals.cur_intcnt++; 165 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { 166 bc->debug_vals.last_jiffies = cur_jiffies; 167 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; 168 bc->debug_vals.cur_intcnt = 0; 169 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; 170 bc->debug_vals.cur_pllcorr = 0; 171 } 172 #endif /* BAYCOM_DEBUG */ 173 } 174 175 /* --------------------------------------------------------------------- */ 176 /* 177 * ===================== SER12 specific routines ========================= 178 */ 179 180 /* --------------------------------------------------------------------- */ 181 182 static inline void ser12_set_divisor(struct net_device *dev, 183 unsigned int divisor) 184 { 185 outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */ 186 outb(divisor, DLL(dev->base_addr)); 187 outb(divisor >> 8, DLM(dev->base_addr)); 188 outb(0x01, LCR(dev->base_addr)); /* word length = 6 */ 189 /* 190 * make sure the next interrupt is generated; 191 * 0 must be used to power the modem; the modem draws its 192 * power from the TxD line 193 */ 194 outb(0x00, THR(dev->base_addr)); 195 /* 196 * it is important not to set the divider while transmitting; 197 * this reportedly makes some UARTs generating interrupts 198 * in the hundredthousands per second region 199 * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno) 200 */ 201 } 202 203 /* --------------------------------------------------------------------- */ 204 205 #if 0 206 static inline unsigned int hweight16(unsigned int w) 207 __attribute__ ((unused)); 208 static inline unsigned int hweight8(unsigned int w) 209 __attribute__ ((unused)); 210 211 static inline unsigned int hweight16(unsigned int w) 212 { 213 unsigned short res = (w & 0x5555) + ((w >> 1) & 0x5555); 214 res = (res & 0x3333) + ((res >> 2) & 0x3333); 215 res = (res & 0x0F0F) + ((res >> 4) & 0x0F0F); 216 return (res & 0x00FF) + ((res >> 8) & 0x00FF); 217 } 218 219 static inline unsigned int hweight8(unsigned int w) 220 { 221 unsigned short res = (w & 0x55) + ((w >> 1) & 0x55); 222 res = (res & 0x33) + ((res >> 2) & 0x33); 223 return (res & 0x0F) + ((res >> 4) & 0x0F); 224 } 225 #endif 226 227 /* --------------------------------------------------------------------- */ 228 229 static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timeval *tv, unsigned char curs) 230 { 231 int timediff; 232 int bdus8 = bc->baud_us >> 3; 233 int bdus4 = bc->baud_us >> 2; 234 int bdus2 = bc->baud_us >> 1; 235 236 timediff = 1000000 + tv->tv_usec - bc->modem.ser12.pll_time; 237 while (timediff >= 500000) 238 timediff -= 1000000; 239 while (timediff >= bdus2) { 240 timediff -= bc->baud_us; 241 bc->modem.ser12.pll_time += bc->baud_us; 242 bc->modem.ser12.dcd_time--; 243 /* first check if there is room to add a bit */ 244 if (bc->modem.shreg & 1) { 245 hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff); 246 bc->modem.shreg = 0x10000; 247 } 248 /* add a one bit */ 249 bc->modem.shreg >>= 1; 250 } 251 if (bc->modem.ser12.dcd_time <= 0) { 252 if (!bc->opt_dcd) 253 hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 + 254 bc->modem.ser12.dcd_sum1 + 255 bc->modem.ser12.dcd_sum2) < 0); 256 bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1; 257 bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0; 258 bc->modem.ser12.dcd_sum0 = 2; /* slight bias */ 259 bc->modem.ser12.dcd_time += 120; 260 } 261 if (bc->modem.ser12.last_rxbit != curs) { 262 bc->modem.ser12.last_rxbit = curs; 263 bc->modem.shreg |= 0x10000; 264 /* adjust the PLL */ 265 if (timediff > 0) 266 bc->modem.ser12.pll_time += bdus8; 267 else 268 bc->modem.ser12.pll_time += 1000000 - bdus8; 269 /* update DCD */ 270 if (abs(timediff) > bdus4) 271 bc->modem.ser12.dcd_sum0 += 4; 272 else 273 bc->modem.ser12.dcd_sum0--; 274 #ifdef BAYCOM_DEBUG 275 bc->debug_vals.cur_pllcorr = timediff; 276 #endif /* BAYCOM_DEBUG */ 277 } 278 while (bc->modem.ser12.pll_time >= 1000000) 279 bc->modem.ser12.pll_time -= 1000000; 280 } 281 282 /* --------------------------------------------------------------------- */ 283 284 static irqreturn_t ser12_interrupt(int irq, void *dev_id) 285 { 286 struct net_device *dev = (struct net_device *)dev_id; 287 struct baycom_state *bc = netdev_priv(dev); 288 struct timeval tv; 289 unsigned char iir, msr; 290 unsigned int txcount = 0; 291 292 if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC) 293 return IRQ_NONE; 294 /* fast way out for shared irq */ 295 if ((iir = inb(IIR(dev->base_addr))) & 1) 296 return IRQ_NONE; 297 /* get current time */ 298 do_gettimeofday(&tv); 299 msr = inb(MSR(dev->base_addr)); 300 /* delta DCD */ 301 if ((msr & 8) && bc->opt_dcd) 302 hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); 303 do { 304 switch (iir & 6) { 305 case 6: 306 inb(LSR(dev->base_addr)); 307 break; 308 309 case 4: 310 inb(RBR(dev->base_addr)); 311 break; 312 313 case 2: 314 /* 315 * make sure the next interrupt is generated; 316 * 0 must be used to power the modem; the modem draws its 317 * power from the TxD line 318 */ 319 outb(0x00, THR(dev->base_addr)); 320 baycom_int_freq(bc); 321 txcount++; 322 /* 323 * first output the last bit (!) then call HDLC transmitter, 324 * since this may take quite long 325 */ 326 if (bc->modem.ptt) 327 outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr)); 328 else 329 outb(0x0d, MCR(dev->base_addr)); /* transmitter off */ 330 break; 331 332 default: 333 msr = inb(MSR(dev->base_addr)); 334 /* delta DCD */ 335 if ((msr & 8) && bc->opt_dcd) 336 hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); 337 break; 338 } 339 iir = inb(IIR(dev->base_addr)); 340 } while (!(iir & 1)); 341 ser12_rx(dev, bc, &tv, msr & 0x10); /* CTS */ 342 if (bc->modem.ptt && txcount) { 343 if (bc->modem.ser12.txshreg <= 1) { 344 bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv); 345 if (!hdlcdrv_ptt(&bc->hdrv)) { 346 ser12_set_divisor(dev, 115200/100/8); 347 bc->modem.ptt = 0; 348 goto end_transmit; 349 } 350 } 351 bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1)); 352 bc->modem.ser12.txshreg >>= 1; 353 } 354 end_transmit: 355 local_irq_enable(); 356 if (!bc->modem.ptt && txcount) { 357 hdlcdrv_arbitrate(dev, &bc->hdrv); 358 if (hdlcdrv_ptt(&bc->hdrv)) { 359 ser12_set_divisor(dev, bc->baud_uartdiv); 360 bc->modem.ser12.txshreg = 1; 361 bc->modem.ptt = 1; 362 } 363 } 364 hdlcdrv_transmitter(dev, &bc->hdrv); 365 hdlcdrv_receiver(dev, &bc->hdrv); 366 local_irq_disable(); 367 return IRQ_HANDLED; 368 } 369 370 /* --------------------------------------------------------------------- */ 371 372 enum uart { c_uart_unknown, c_uart_8250, 373 c_uart_16450, c_uart_16550, c_uart_16550A}; 374 static const char *uart_str[] = { 375 "unknown", "8250", "16450", "16550", "16550A" 376 }; 377 378 static enum uart ser12_check_uart(unsigned int iobase) 379 { 380 unsigned char b1,b2,b3; 381 enum uart u; 382 enum uart uart_tab[] = 383 { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A }; 384 385 b1 = inb(MCR(iobase)); 386 outb(b1 | 0x10, MCR(iobase)); /* loopback mode */ 387 b2 = inb(MSR(iobase)); 388 outb(0x1a, MCR(iobase)); 389 b3 = inb(MSR(iobase)) & 0xf0; 390 outb(b1, MCR(iobase)); /* restore old values */ 391 outb(b2, MSR(iobase)); 392 if (b3 != 0x90) 393 return c_uart_unknown; 394 inb(RBR(iobase)); 395 inb(RBR(iobase)); 396 outb(0x01, FCR(iobase)); /* enable FIFOs */ 397 u = uart_tab[(inb(IIR(iobase)) >> 6) & 3]; 398 if (u == c_uart_16450) { 399 outb(0x5a, SCR(iobase)); 400 b1 = inb(SCR(iobase)); 401 outb(0xa5, SCR(iobase)); 402 b2 = inb(SCR(iobase)); 403 if ((b1 != 0x5a) || (b2 != 0xa5)) 404 u = c_uart_8250; 405 } 406 return u; 407 } 408 409 /* --------------------------------------------------------------------- */ 410 411 static int ser12_open(struct net_device *dev) 412 { 413 struct baycom_state *bc = netdev_priv(dev); 414 enum uart u; 415 416 if (!dev || !bc) 417 return -ENXIO; 418 if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT || 419 dev->irq < 2 || dev->irq > NR_IRQS) { 420 printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) " 421 "or irq (2 <= irq <= %d)\n", 422 0xffff-SER12_EXTENT, NR_IRQS); 423 return -ENXIO; 424 } 425 if (bc->baud < 300 || bc->baud > 4800) { 426 printk(KERN_INFO "baycom_ser_fdx: invalid baudrate " 427 "(300...4800)\n"); 428 return -EINVAL; 429 } 430 if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) { 431 printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy \n", 432 dev->base_addr); 433 return -EACCES; 434 } 435 memset(&bc->modem, 0, sizeof(bc->modem)); 436 bc->hdrv.par.bitrate = bc->baud; 437 bc->baud_us = 1000000/bc->baud; 438 bc->baud_uartdiv = (115200/8)/bc->baud; 439 if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown){ 440 release_region(dev->base_addr, SER12_EXTENT); 441 return -EIO; 442 } 443 outb(0, FCR(dev->base_addr)); /* disable FIFOs */ 444 outb(0x0d, MCR(dev->base_addr)); 445 outb(0, IER(dev->base_addr)); 446 if (request_irq(dev->irq, ser12_interrupt, IRQF_DISABLED | IRQF_SHARED, 447 "baycom_ser_fdx", dev)) { 448 release_region(dev->base_addr, SER12_EXTENT); 449 return -EBUSY; 450 } 451 /* 452 * set the SIO to 6 Bits/character; during receive, 453 * the baud rate is set to produce 100 ints/sec 454 * to feed the channel arbitration process, 455 * during transmit to baud ints/sec to run 456 * the transmitter 457 */ 458 ser12_set_divisor(dev, 115200/100/8); 459 /* 460 * enable transmitter empty interrupt and modem status interrupt 461 */ 462 outb(0x0a, IER(dev->base_addr)); 463 /* 464 * make sure the next interrupt is generated; 465 * 0 must be used to power the modem; the modem draws its 466 * power from the TxD line 467 */ 468 outb(0x00, THR(dev->base_addr)); 469 hdlcdrv_setdcd(&bc->hdrv, 0); 470 printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %s\n", 471 bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]); 472 return 0; 473 } 474 475 /* --------------------------------------------------------------------- */ 476 477 static int ser12_close(struct net_device *dev) 478 { 479 struct baycom_state *bc = netdev_priv(dev); 480 481 if (!dev || !bc) 482 return -EINVAL; 483 /* 484 * disable interrupts 485 */ 486 outb(0, IER(dev->base_addr)); 487 outb(1, MCR(dev->base_addr)); 488 free_irq(dev->irq, dev); 489 release_region(dev->base_addr, SER12_EXTENT); 490 printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n", 491 bc_drvname, dev->base_addr, dev->irq); 492 return 0; 493 } 494 495 /* --------------------------------------------------------------------- */ 496 /* 497 * ===================== hdlcdrv driver interface ========================= 498 */ 499 500 /* --------------------------------------------------------------------- */ 501 502 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, 503 struct hdlcdrv_ioctl *hi, int cmd); 504 505 /* --------------------------------------------------------------------- */ 506 507 static struct hdlcdrv_ops ser12_ops = { 508 .drvname = bc_drvname, 509 .drvinfo = bc_drvinfo, 510 .open = ser12_open, 511 .close = ser12_close, 512 .ioctl = baycom_ioctl, 513 }; 514 515 /* --------------------------------------------------------------------- */ 516 517 static int baycom_setmode(struct baycom_state *bc, const char *modestr) 518 { 519 unsigned int baud; 520 521 if (!strncmp(modestr, "ser", 3)) { 522 baud = simple_strtoul(modestr+3, NULL, 10); 523 if (baud >= 3 && baud <= 48) 524 bc->baud = baud*100; 525 } 526 if (strchr(modestr, '*')) 527 bc->opt_dcd = 0; 528 else if (strchr(modestr, '+')) 529 bc->opt_dcd = -1; 530 else 531 bc->opt_dcd = 1; 532 return 0; 533 } 534 535 /* --------------------------------------------------------------------- */ 536 537 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, 538 struct hdlcdrv_ioctl *hi, int cmd) 539 { 540 struct baycom_state *bc; 541 struct baycom_ioctl bi; 542 543 if (!dev) 544 return -EINVAL; 545 546 bc = netdev_priv(dev); 547 BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC); 548 549 if (cmd != SIOCDEVPRIVATE) 550 return -ENOIOCTLCMD; 551 switch (hi->cmd) { 552 default: 553 break; 554 555 case HDLCDRVCTL_GETMODE: 556 sprintf(hi->data.modename, "ser%u", bc->baud / 100); 557 if (bc->opt_dcd <= 0) 558 strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+"); 559 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) 560 return -EFAULT; 561 return 0; 562 563 case HDLCDRVCTL_SETMODE: 564 if (netif_running(dev) || !capable(CAP_NET_ADMIN)) 565 return -EACCES; 566 hi->data.modename[sizeof(hi->data.modename)-1] = '\0'; 567 return baycom_setmode(bc, hi->data.modename); 568 569 case HDLCDRVCTL_MODELIST: 570 strcpy(hi->data.modename, "ser12,ser3,ser24"); 571 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) 572 return -EFAULT; 573 return 0; 574 575 case HDLCDRVCTL_MODEMPARMASK: 576 return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ; 577 578 } 579 580 if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi))) 581 return -EFAULT; 582 switch (bi.cmd) { 583 default: 584 return -ENOIOCTLCMD; 585 586 #ifdef BAYCOM_DEBUG 587 case BAYCOMCTL_GETDEBUG: 588 bi.data.dbg.debug1 = bc->hdrv.ptt_keyed; 589 bi.data.dbg.debug2 = bc->debug_vals.last_intcnt; 590 bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr; 591 break; 592 #endif /* BAYCOM_DEBUG */ 593 594 } 595 if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi))) 596 return -EFAULT; 597 return 0; 598 599 } 600 601 /* --------------------------------------------------------------------- */ 602 603 /* 604 * command line settable parameters 605 */ 606 static char *mode[NR_PORTS] = { "ser12*", }; 607 static int iobase[NR_PORTS] = { 0x3f8, }; 608 static int irq[NR_PORTS] = { 4, }; 609 static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 }; 610 611 module_param_array(mode, charp, NULL, 0); 612 MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD"); 613 module_param_array(iobase, int, NULL, 0); 614 MODULE_PARM_DESC(iobase, "baycom io base address"); 615 module_param_array(irq, int, NULL, 0); 616 MODULE_PARM_DESC(irq, "baycom irq number"); 617 module_param_array(baud, int, NULL, 0); 618 MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)"); 619 620 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); 621 MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver"); 622 MODULE_LICENSE("GPL"); 623 624 /* --------------------------------------------------------------------- */ 625 626 static int __init init_baycomserfdx(void) 627 { 628 int i, found = 0; 629 char set_hw = 1; 630 631 printk(bc_drvinfo); 632 /* 633 * register net devices 634 */ 635 for (i = 0; i < NR_PORTS; i++) { 636 struct net_device *dev; 637 struct baycom_state *bc; 638 char ifname[IFNAMSIZ]; 639 640 sprintf(ifname, "bcsf%d", i); 641 642 if (!mode[i]) 643 set_hw = 0; 644 if (!set_hw) 645 iobase[i] = irq[i] = 0; 646 647 dev = hdlcdrv_register(&ser12_ops, 648 sizeof(struct baycom_state), 649 ifname, iobase[i], irq[i], 0); 650 if (IS_ERR(dev)) 651 break; 652 653 bc = netdev_priv(dev); 654 if (set_hw && baycom_setmode(bc, mode[i])) 655 set_hw = 0; 656 bc->baud = baud[i]; 657 found++; 658 baycom_device[i] = dev; 659 } 660 661 if (!found) 662 return -ENXIO; 663 return 0; 664 } 665 666 static void __exit cleanup_baycomserfdx(void) 667 { 668 int i; 669 670 for(i = 0; i < NR_PORTS; i++) { 671 struct net_device *dev = baycom_device[i]; 672 if (dev) 673 hdlcdrv_unregister(dev); 674 } 675 } 676 677 module_init(init_baycomserfdx); 678 module_exit(cleanup_baycomserfdx); 679 680 /* --------------------------------------------------------------------- */ 681 682 #ifndef MODULE 683 684 /* 685 * format: baycom_ser_fdx=io,irq,mode 686 * mode: ser# hardware DCD 687 * ser#* software DCD 688 * ser#+ hardware DCD, inverted signal at DCD pin 689 * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' 690 */ 691 692 static int __init baycom_ser_fdx_setup(char *str) 693 { 694 static unsigned nr_dev; 695 int ints[4]; 696 697 if (nr_dev >= NR_PORTS) 698 return 0; 699 str = get_options(str, 4, ints); 700 if (ints[0] < 2) 701 return 0; 702 mode[nr_dev] = str; 703 iobase[nr_dev] = ints[1]; 704 irq[nr_dev] = ints[2]; 705 if (ints[0] >= 3) 706 baud[nr_dev] = ints[3]; 707 nr_dev++; 708 return 1; 709 } 710 711 __setup("baycom_ser_fdx=", baycom_ser_fdx_setup); 712 713 #endif /* MODULE */ 714 /* --------------------------------------------------------------------- */ 715