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 93 static const char bc_drvname[] = "baycom_ser_fdx"; 94 static 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 4 100 101 static 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 */ 124 125 struct 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 /* --------------------------------------------------------------------- */ 157 158 static 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 /* --------------------------------------------------------------------- */ 182 183 static 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 #if 0 207 static inline unsigned int hweight16(unsigned int w) 208 __attribute__ ((unused)); 209 static inline unsigned int hweight8(unsigned int w) 210 __attribute__ ((unused)); 211 212 static inline unsigned int hweight16(unsigned int w) 213 { 214 unsigned short res = (w & 0x5555) + ((w >> 1) & 0x5555); 215 res = (res & 0x3333) + ((res >> 2) & 0x3333); 216 res = (res & 0x0F0F) + ((res >> 4) & 0x0F0F); 217 return (res & 0x00FF) + ((res >> 8) & 0x00FF); 218 } 219 220 static inline unsigned int hweight8(unsigned int w) 221 { 222 unsigned short res = (w & 0x55) + ((w >> 1) & 0x55); 223 res = (res & 0x33) + ((res >> 2) & 0x33); 224 return (res & 0x0F) + ((res >> 4) & 0x0F); 225 } 226 #endif 227 228 /* --------------------------------------------------------------------- */ 229 230 static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timeval *tv, unsigned char curs) 231 { 232 int timediff; 233 int bdus8 = bc->baud_us >> 3; 234 int bdus4 = bc->baud_us >> 2; 235 int bdus2 = bc->baud_us >> 1; 236 237 timediff = 1000000 + tv->tv_usec - bc->modem.ser12.pll_time; 238 while (timediff >= 500000) 239 timediff -= 1000000; 240 while (timediff >= bdus2) { 241 timediff -= bc->baud_us; 242 bc->modem.ser12.pll_time += bc->baud_us; 243 bc->modem.ser12.dcd_time--; 244 /* first check if there is room to add a bit */ 245 if (bc->modem.shreg & 1) { 246 hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff); 247 bc->modem.shreg = 0x10000; 248 } 249 /* add a one bit */ 250 bc->modem.shreg >>= 1; 251 } 252 if (bc->modem.ser12.dcd_time <= 0) { 253 if (!bc->opt_dcd) 254 hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 + 255 bc->modem.ser12.dcd_sum1 + 256 bc->modem.ser12.dcd_sum2) < 0); 257 bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1; 258 bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0; 259 bc->modem.ser12.dcd_sum0 = 2; /* slight bias */ 260 bc->modem.ser12.dcd_time += 120; 261 } 262 if (bc->modem.ser12.last_rxbit != curs) { 263 bc->modem.ser12.last_rxbit = curs; 264 bc->modem.shreg |= 0x10000; 265 /* adjust the PLL */ 266 if (timediff > 0) 267 bc->modem.ser12.pll_time += bdus8; 268 else 269 bc->modem.ser12.pll_time += 1000000 - bdus8; 270 /* update DCD */ 271 if (abs(timediff) > bdus4) 272 bc->modem.ser12.dcd_sum0 += 4; 273 else 274 bc->modem.ser12.dcd_sum0--; 275 #ifdef BAYCOM_DEBUG 276 bc->debug_vals.cur_pllcorr = timediff; 277 #endif /* BAYCOM_DEBUG */ 278 } 279 while (bc->modem.ser12.pll_time >= 1000000) 280 bc->modem.ser12.pll_time -= 1000000; 281 } 282 283 /* --------------------------------------------------------------------- */ 284 285 static irqreturn_t ser12_interrupt(int irq, void *dev_id) 286 { 287 struct net_device *dev = (struct net_device *)dev_id; 288 struct baycom_state *bc = netdev_priv(dev); 289 struct timeval tv; 290 unsigned char iir, msr; 291 unsigned int txcount = 0; 292 293 if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC) 294 return IRQ_NONE; 295 /* fast way out for shared irq */ 296 if ((iir = inb(IIR(dev->base_addr))) & 1) 297 return IRQ_NONE; 298 /* get current time */ 299 do_gettimeofday(&tv); 300 msr = inb(MSR(dev->base_addr)); 301 /* delta DCD */ 302 if ((msr & 8) && bc->opt_dcd) 303 hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); 304 do { 305 switch (iir & 6) { 306 case 6: 307 inb(LSR(dev->base_addr)); 308 break; 309 310 case 4: 311 inb(RBR(dev->base_addr)); 312 break; 313 314 case 2: 315 /* 316 * make sure the next interrupt is generated; 317 * 0 must be used to power the modem; the modem draws its 318 * power from the TxD line 319 */ 320 outb(0x00, THR(dev->base_addr)); 321 baycom_int_freq(bc); 322 txcount++; 323 /* 324 * first output the last bit (!) then call HDLC transmitter, 325 * since this may take quite long 326 */ 327 if (bc->modem.ptt) 328 outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr)); 329 else 330 outb(0x0d, MCR(dev->base_addr)); /* transmitter off */ 331 break; 332 333 default: 334 msr = inb(MSR(dev->base_addr)); 335 /* delta DCD */ 336 if ((msr & 8) && bc->opt_dcd) 337 hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); 338 break; 339 } 340 iir = inb(IIR(dev->base_addr)); 341 } while (!(iir & 1)); 342 ser12_rx(dev, bc, &tv, msr & 0x10); /* CTS */ 343 if (bc->modem.ptt && txcount) { 344 if (bc->modem.ser12.txshreg <= 1) { 345 bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv); 346 if (!hdlcdrv_ptt(&bc->hdrv)) { 347 ser12_set_divisor(dev, 115200/100/8); 348 bc->modem.ptt = 0; 349 goto end_transmit; 350 } 351 } 352 bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1)); 353 bc->modem.ser12.txshreg >>= 1; 354 } 355 end_transmit: 356 local_irq_enable(); 357 if (!bc->modem.ptt && txcount) { 358 hdlcdrv_arbitrate(dev, &bc->hdrv); 359 if (hdlcdrv_ptt(&bc->hdrv)) { 360 ser12_set_divisor(dev, bc->baud_uartdiv); 361 bc->modem.ser12.txshreg = 1; 362 bc->modem.ptt = 1; 363 } 364 } 365 hdlcdrv_transmitter(dev, &bc->hdrv); 366 hdlcdrv_receiver(dev, &bc->hdrv); 367 local_irq_disable(); 368 return IRQ_HANDLED; 369 } 370 371 /* --------------------------------------------------------------------- */ 372 373 enum uart { c_uart_unknown, c_uart_8250, 374 c_uart_16450, c_uart_16550, c_uart_16550A}; 375 static const char *uart_str[] = { 376 "unknown", "8250", "16450", "16550", "16550A" 377 }; 378 379 static enum uart ser12_check_uart(unsigned int iobase) 380 { 381 unsigned char b1,b2,b3; 382 enum uart u; 383 enum uart uart_tab[] = 384 { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A }; 385 386 b1 = inb(MCR(iobase)); 387 outb(b1 | 0x10, MCR(iobase)); /* loopback mode */ 388 b2 = inb(MSR(iobase)); 389 outb(0x1a, MCR(iobase)); 390 b3 = inb(MSR(iobase)) & 0xf0; 391 outb(b1, MCR(iobase)); /* restore old values */ 392 outb(b2, MSR(iobase)); 393 if (b3 != 0x90) 394 return c_uart_unknown; 395 inb(RBR(iobase)); 396 inb(RBR(iobase)); 397 outb(0x01, FCR(iobase)); /* enable FIFOs */ 398 u = uart_tab[(inb(IIR(iobase)) >> 6) & 3]; 399 if (u == c_uart_16450) { 400 outb(0x5a, SCR(iobase)); 401 b1 = inb(SCR(iobase)); 402 outb(0xa5, SCR(iobase)); 403 b2 = inb(SCR(iobase)); 404 if ((b1 != 0x5a) || (b2 != 0xa5)) 405 u = c_uart_8250; 406 } 407 return u; 408 } 409 410 /* --------------------------------------------------------------------- */ 411 412 static int ser12_open(struct net_device *dev) 413 { 414 struct baycom_state *bc = netdev_priv(dev); 415 enum uart u; 416 417 if (!dev || !bc) 418 return -ENXIO; 419 if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT || 420 dev->irq < 2 || dev->irq > nr_irqs) { 421 printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) " 422 "or irq (2 <= irq <= %d)\n", 423 0xffff-SER12_EXTENT, nr_irqs); 424 return -ENXIO; 425 } 426 if (bc->baud < 300 || bc->baud > 4800) { 427 printk(KERN_INFO "baycom_ser_fdx: invalid baudrate " 428 "(300...4800)\n"); 429 return -EINVAL; 430 } 431 if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) { 432 printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy\n", 433 dev->base_addr); 434 return -EACCES; 435 } 436 memset(&bc->modem, 0, sizeof(bc->modem)); 437 bc->hdrv.par.bitrate = bc->baud; 438 bc->baud_us = 1000000/bc->baud; 439 bc->baud_uartdiv = (115200/8)/bc->baud; 440 if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown){ 441 release_region(dev->base_addr, SER12_EXTENT); 442 return -EIO; 443 } 444 outb(0, FCR(dev->base_addr)); /* disable FIFOs */ 445 outb(0x0d, MCR(dev->base_addr)); 446 outb(0, IER(dev->base_addr)); 447 if (request_irq(dev->irq, ser12_interrupt, IRQF_DISABLED | IRQF_SHARED, 448 "baycom_ser_fdx", dev)) { 449 release_region(dev->base_addr, SER12_EXTENT); 450 return -EBUSY; 451 } 452 /* 453 * set the SIO to 6 Bits/character; during receive, 454 * the baud rate is set to produce 100 ints/sec 455 * to feed the channel arbitration process, 456 * during transmit to baud ints/sec to run 457 * the transmitter 458 */ 459 ser12_set_divisor(dev, 115200/100/8); 460 /* 461 * enable transmitter empty interrupt and modem status interrupt 462 */ 463 outb(0x0a, IER(dev->base_addr)); 464 /* 465 * make sure the next interrupt is generated; 466 * 0 must be used to power the modem; the modem draws its 467 * power from the TxD line 468 */ 469 outb(0x00, THR(dev->base_addr)); 470 hdlcdrv_setdcd(&bc->hdrv, 0); 471 printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %s\n", 472 bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]); 473 return 0; 474 } 475 476 /* --------------------------------------------------------------------- */ 477 478 static int ser12_close(struct net_device *dev) 479 { 480 struct baycom_state *bc = netdev_priv(dev); 481 482 if (!dev || !bc) 483 return -EINVAL; 484 /* 485 * disable interrupts 486 */ 487 outb(0, IER(dev->base_addr)); 488 outb(1, MCR(dev->base_addr)); 489 free_irq(dev->irq, dev); 490 release_region(dev->base_addr, SER12_EXTENT); 491 printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n", 492 bc_drvname, dev->base_addr, dev->irq); 493 return 0; 494 } 495 496 /* --------------------------------------------------------------------- */ 497 /* 498 * ===================== hdlcdrv driver interface ========================= 499 */ 500 501 /* --------------------------------------------------------------------- */ 502 503 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, 504 struct hdlcdrv_ioctl *hi, int cmd); 505 506 /* --------------------------------------------------------------------- */ 507 508 static struct hdlcdrv_ops ser12_ops = { 509 .drvname = bc_drvname, 510 .drvinfo = bc_drvinfo, 511 .open = ser12_open, 512 .close = ser12_close, 513 .ioctl = baycom_ioctl, 514 }; 515 516 /* --------------------------------------------------------------------- */ 517 518 static int baycom_setmode(struct baycom_state *bc, const char *modestr) 519 { 520 unsigned int baud; 521 522 if (!strncmp(modestr, "ser", 3)) { 523 baud = simple_strtoul(modestr+3, NULL, 10); 524 if (baud >= 3 && baud <= 48) 525 bc->baud = baud*100; 526 } 527 if (strchr(modestr, '*')) 528 bc->opt_dcd = 0; 529 else if (strchr(modestr, '+')) 530 bc->opt_dcd = -1; 531 else 532 bc->opt_dcd = 1; 533 return 0; 534 } 535 536 /* --------------------------------------------------------------------- */ 537 538 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, 539 struct hdlcdrv_ioctl *hi, int cmd) 540 { 541 struct baycom_state *bc; 542 struct baycom_ioctl bi; 543 544 if (!dev) 545 return -EINVAL; 546 547 bc = netdev_priv(dev); 548 BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC); 549 550 if (cmd != SIOCDEVPRIVATE) 551 return -ENOIOCTLCMD; 552 switch (hi->cmd) { 553 default: 554 break; 555 556 case HDLCDRVCTL_GETMODE: 557 sprintf(hi->data.modename, "ser%u", bc->baud / 100); 558 if (bc->opt_dcd <= 0) 559 strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+"); 560 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) 561 return -EFAULT; 562 return 0; 563 564 case HDLCDRVCTL_SETMODE: 565 if (netif_running(dev) || !capable(CAP_NET_ADMIN)) 566 return -EACCES; 567 hi->data.modename[sizeof(hi->data.modename)-1] = '\0'; 568 return baycom_setmode(bc, hi->data.modename); 569 570 case HDLCDRVCTL_MODELIST: 571 strcpy(hi->data.modename, "ser12,ser3,ser24"); 572 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) 573 return -EFAULT; 574 return 0; 575 576 case HDLCDRVCTL_MODEMPARMASK: 577 return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ; 578 579 } 580 581 if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi))) 582 return -EFAULT; 583 switch (bi.cmd) { 584 default: 585 return -ENOIOCTLCMD; 586 587 #ifdef BAYCOM_DEBUG 588 case BAYCOMCTL_GETDEBUG: 589 bi.data.dbg.debug1 = bc->hdrv.ptt_keyed; 590 bi.data.dbg.debug2 = bc->debug_vals.last_intcnt; 591 bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr; 592 break; 593 #endif /* BAYCOM_DEBUG */ 594 595 } 596 if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi))) 597 return -EFAULT; 598 return 0; 599 600 } 601 602 /* --------------------------------------------------------------------- */ 603 604 /* 605 * command line settable parameters 606 */ 607 static char *mode[NR_PORTS] = { "ser12*", }; 608 static int iobase[NR_PORTS] = { 0x3f8, }; 609 static int irq[NR_PORTS] = { 4, }; 610 static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 }; 611 612 module_param_array(mode, charp, NULL, 0); 613 MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD"); 614 module_param_array(iobase, int, NULL, 0); 615 MODULE_PARM_DESC(iobase, "baycom io base address"); 616 module_param_array(irq, int, NULL, 0); 617 MODULE_PARM_DESC(irq, "baycom irq number"); 618 module_param_array(baud, int, NULL, 0); 619 MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)"); 620 621 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); 622 MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver"); 623 MODULE_LICENSE("GPL"); 624 625 /* --------------------------------------------------------------------- */ 626 627 static int __init init_baycomserfdx(void) 628 { 629 int i, found = 0; 630 char set_hw = 1; 631 632 printk(bc_drvinfo); 633 /* 634 * register net devices 635 */ 636 for (i = 0; i < NR_PORTS; i++) { 637 struct net_device *dev; 638 struct baycom_state *bc; 639 char ifname[IFNAMSIZ]; 640 641 sprintf(ifname, "bcsf%d", i); 642 643 if (!mode[i]) 644 set_hw = 0; 645 if (!set_hw) 646 iobase[i] = irq[i] = 0; 647 648 dev = hdlcdrv_register(&ser12_ops, 649 sizeof(struct baycom_state), 650 ifname, iobase[i], irq[i], 0); 651 if (IS_ERR(dev)) 652 break; 653 654 bc = netdev_priv(dev); 655 if (set_hw && baycom_setmode(bc, mode[i])) 656 set_hw = 0; 657 bc->baud = baud[i]; 658 found++; 659 baycom_device[i] = dev; 660 } 661 662 if (!found) 663 return -ENXIO; 664 return 0; 665 } 666 667 static void __exit cleanup_baycomserfdx(void) 668 { 669 int i; 670 671 for(i = 0; i < NR_PORTS; i++) { 672 struct net_device *dev = baycom_device[i]; 673 if (dev) 674 hdlcdrv_unregister(dev); 675 } 676 } 677 678 module_init(init_baycomserfdx); 679 module_exit(cleanup_baycomserfdx); 680 681 /* --------------------------------------------------------------------- */ 682 683 #ifndef MODULE 684 685 /* 686 * format: baycom_ser_fdx=io,irq,mode 687 * mode: ser# hardware DCD 688 * ser#* software DCD 689 * ser#+ hardware DCD, inverted signal at DCD pin 690 * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' 691 */ 692 693 static int __init baycom_ser_fdx_setup(char *str) 694 { 695 static unsigned nr_dev; 696 int ints[4]; 697 698 if (nr_dev >= NR_PORTS) 699 return 0; 700 str = get_options(str, 4, ints); 701 if (ints[0] < 2) 702 return 0; 703 mode[nr_dev] = str; 704 iobase[nr_dev] = ints[1]; 705 irq[nr_dev] = ints[2]; 706 if (ints[0] >= 3) 707 baud[nr_dev] = ints[3]; 708 nr_dev++; 709 return 1; 710 } 711 712 __setup("baycom_ser_fdx=", baycom_ser_fdx_setup); 713 714 #endif /* MODULE */ 715 /* --------------------------------------------------------------------- */ 716