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/interrupt.h> 80 #include <linux/hdlcdrv.h> 81 #include <linux/baycom.h> 82 #include <linux/jiffies.h> 83 #include <linux/time64.h> 84 85 #include <linux/uaccess.h> 86 #include <asm/io.h> 87 #include <asm/irq.h> 88 89 /* --------------------------------------------------------------------- */ 90 91 #define BAYCOM_DEBUG 92 93 /* --------------------------------------------------------------------- */ 94 95 static const char bc_drvname[] = "baycom_ser_fdx"; 96 static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n" 97 "baycom_ser_fdx: version 0.10\n"; 98 99 /* --------------------------------------------------------------------- */ 100 101 #define NR_PORTS 4 102 103 static struct net_device *baycom_device[NR_PORTS]; 104 105 /* --------------------------------------------------------------------- */ 106 107 #define RBR(iobase) (iobase+0) 108 #define THR(iobase) (iobase+0) 109 #define IER(iobase) (iobase+1) 110 #define IIR(iobase) (iobase+2) 111 #define FCR(iobase) (iobase+2) 112 #define LCR(iobase) (iobase+3) 113 #define MCR(iobase) (iobase+4) 114 #define LSR(iobase) (iobase+5) 115 #define MSR(iobase) (iobase+6) 116 #define SCR(iobase) (iobase+7) 117 #define DLL(iobase) (iobase+0) 118 #define DLM(iobase) (iobase+1) 119 120 #define SER12_EXTENT 8 121 122 /* ---------------------------------------------------------------------- */ 123 /* 124 * Information that need to be kept for each board. 125 */ 126 127 struct baycom_state { 128 struct hdlcdrv_state hdrv; 129 130 unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout; 131 int opt_dcd; 132 133 struct modem_state { 134 unsigned char flags; 135 unsigned char ptt; 136 unsigned int shreg; 137 struct modem_state_ser12 { 138 unsigned char tx_bit; 139 unsigned char last_rxbit; 140 int dcd_sum0, dcd_sum1, dcd_sum2; 141 int dcd_time; 142 unsigned int pll_time; 143 unsigned int txshreg; 144 } ser12; 145 } modem; 146 147 #ifdef BAYCOM_DEBUG 148 struct debug_vals { 149 unsigned long last_jiffies; 150 unsigned cur_intcnt; 151 unsigned last_intcnt; 152 int cur_pllcorr; 153 int last_pllcorr; 154 } debug_vals; 155 #endif /* BAYCOM_DEBUG */ 156 }; 157 158 /* --------------------------------------------------------------------- */ 159 160 static inline void baycom_int_freq(struct baycom_state *bc) 161 { 162 #ifdef BAYCOM_DEBUG 163 unsigned long cur_jiffies = jiffies; 164 /* 165 * measure the interrupt frequency 166 */ 167 bc->debug_vals.cur_intcnt++; 168 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { 169 bc->debug_vals.last_jiffies = cur_jiffies; 170 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; 171 bc->debug_vals.cur_intcnt = 0; 172 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; 173 bc->debug_vals.cur_pllcorr = 0; 174 } 175 #endif /* BAYCOM_DEBUG */ 176 } 177 178 /* --------------------------------------------------------------------- */ 179 /* 180 * ===================== SER12 specific routines ========================= 181 */ 182 183 /* --------------------------------------------------------------------- */ 184 185 static inline void ser12_set_divisor(struct net_device *dev, 186 unsigned int divisor) 187 { 188 outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */ 189 outb(divisor, DLL(dev->base_addr)); 190 outb(divisor >> 8, DLM(dev->base_addr)); 191 outb(0x01, LCR(dev->base_addr)); /* word length = 6 */ 192 /* 193 * make sure the next interrupt is generated; 194 * 0 must be used to power the modem; the modem draws its 195 * power from the TxD line 196 */ 197 outb(0x00, THR(dev->base_addr)); 198 /* 199 * it is important not to set the divider while transmitting; 200 * this reportedly makes some UARTs generating interrupts 201 * in the hundredthousands per second region 202 * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno) 203 */ 204 } 205 206 /* --------------------------------------------------------------------- */ 207 208 #if 0 209 static inline unsigned int hweight16(unsigned int w) 210 __attribute__ ((unused)); 211 static inline unsigned int hweight8(unsigned int w) 212 __attribute__ ((unused)); 213 214 static inline unsigned int hweight16(unsigned int w) 215 { 216 unsigned short res = (w & 0x5555) + ((w >> 1) & 0x5555); 217 res = (res & 0x3333) + ((res >> 2) & 0x3333); 218 res = (res & 0x0F0F) + ((res >> 4) & 0x0F0F); 219 return (res & 0x00FF) + ((res >> 8) & 0x00FF); 220 } 221 222 static inline unsigned int hweight8(unsigned int w) 223 { 224 unsigned short res = (w & 0x55) + ((w >> 1) & 0x55); 225 res = (res & 0x33) + ((res >> 2) & 0x33); 226 return (res & 0x0F) + ((res >> 4) & 0x0F); 227 } 228 #endif 229 230 /* --------------------------------------------------------------------- */ 231 232 static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timespec64 *ts, unsigned char curs) 233 { 234 int timediff; 235 int bdus8 = bc->baud_us >> 3; 236 int bdus4 = bc->baud_us >> 2; 237 int bdus2 = bc->baud_us >> 1; 238 239 timediff = 1000000 + ts->tv_nsec / NSEC_PER_USEC - 240 bc->modem.ser12.pll_time; 241 while (timediff >= 500000) 242 timediff -= 1000000; 243 while (timediff >= bdus2) { 244 timediff -= bc->baud_us; 245 bc->modem.ser12.pll_time += bc->baud_us; 246 bc->modem.ser12.dcd_time--; 247 /* first check if there is room to add a bit */ 248 if (bc->modem.shreg & 1) { 249 hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff); 250 bc->modem.shreg = 0x10000; 251 } 252 /* add a one bit */ 253 bc->modem.shreg >>= 1; 254 } 255 if (bc->modem.ser12.dcd_time <= 0) { 256 if (!bc->opt_dcd) 257 hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 + 258 bc->modem.ser12.dcd_sum1 + 259 bc->modem.ser12.dcd_sum2) < 0); 260 bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1; 261 bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0; 262 bc->modem.ser12.dcd_sum0 = 2; /* slight bias */ 263 bc->modem.ser12.dcd_time += 120; 264 } 265 if (bc->modem.ser12.last_rxbit != curs) { 266 bc->modem.ser12.last_rxbit = curs; 267 bc->modem.shreg |= 0x10000; 268 /* adjust the PLL */ 269 if (timediff > 0) 270 bc->modem.ser12.pll_time += bdus8; 271 else 272 bc->modem.ser12.pll_time += 1000000 - bdus8; 273 /* update DCD */ 274 if (abs(timediff) > bdus4) 275 bc->modem.ser12.dcd_sum0 += 4; 276 else 277 bc->modem.ser12.dcd_sum0--; 278 #ifdef BAYCOM_DEBUG 279 bc->debug_vals.cur_pllcorr = timediff; 280 #endif /* BAYCOM_DEBUG */ 281 } 282 while (bc->modem.ser12.pll_time >= 1000000) 283 bc->modem.ser12.pll_time -= 1000000; 284 } 285 286 /* --------------------------------------------------------------------- */ 287 288 static irqreturn_t ser12_interrupt(int irq, void *dev_id) 289 { 290 struct net_device *dev = (struct net_device *)dev_id; 291 struct baycom_state *bc = netdev_priv(dev); 292 struct timespec64 ts; 293 unsigned char iir, msr; 294 unsigned int txcount = 0; 295 296 if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC) 297 return IRQ_NONE; 298 /* fast way out for shared irq */ 299 if ((iir = inb(IIR(dev->base_addr))) & 1) 300 return IRQ_NONE; 301 /* get current time */ 302 ktime_get_ts64(&ts); 303 msr = inb(MSR(dev->base_addr)); 304 /* delta DCD */ 305 if ((msr & 8) && bc->opt_dcd) 306 hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); 307 do { 308 switch (iir & 6) { 309 case 6: 310 inb(LSR(dev->base_addr)); 311 break; 312 313 case 4: 314 inb(RBR(dev->base_addr)); 315 break; 316 317 case 2: 318 /* 319 * make sure the next interrupt is generated; 320 * 0 must be used to power the modem; the modem draws its 321 * power from the TxD line 322 */ 323 outb(0x00, THR(dev->base_addr)); 324 baycom_int_freq(bc); 325 txcount++; 326 /* 327 * first output the last bit (!) then call HDLC transmitter, 328 * since this may take quite long 329 */ 330 if (bc->modem.ptt) 331 outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr)); 332 else 333 outb(0x0d, MCR(dev->base_addr)); /* transmitter off */ 334 break; 335 336 default: 337 msr = inb(MSR(dev->base_addr)); 338 /* delta DCD */ 339 if ((msr & 8) && bc->opt_dcd) 340 hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); 341 break; 342 } 343 iir = inb(IIR(dev->base_addr)); 344 } while (!(iir & 1)); 345 ser12_rx(dev, bc, &ts, msr & 0x10); /* CTS */ 346 if (bc->modem.ptt && txcount) { 347 if (bc->modem.ser12.txshreg <= 1) { 348 bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv); 349 if (!hdlcdrv_ptt(&bc->hdrv)) { 350 ser12_set_divisor(dev, 115200/100/8); 351 bc->modem.ptt = 0; 352 goto end_transmit; 353 } 354 } 355 bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1)); 356 bc->modem.ser12.txshreg >>= 1; 357 } 358 end_transmit: 359 local_irq_enable(); 360 if (!bc->modem.ptt && txcount) { 361 hdlcdrv_arbitrate(dev, &bc->hdrv); 362 if (hdlcdrv_ptt(&bc->hdrv)) { 363 ser12_set_divisor(dev, bc->baud_uartdiv); 364 bc->modem.ser12.txshreg = 1; 365 bc->modem.ptt = 1; 366 } 367 } 368 hdlcdrv_transmitter(dev, &bc->hdrv); 369 hdlcdrv_receiver(dev, &bc->hdrv); 370 local_irq_disable(); 371 return IRQ_HANDLED; 372 } 373 374 /* --------------------------------------------------------------------- */ 375 376 enum uart { c_uart_unknown, c_uart_8250, 377 c_uart_16450, c_uart_16550, c_uart_16550A}; 378 static const char *uart_str[] = { 379 "unknown", "8250", "16450", "16550", "16550A" 380 }; 381 382 static enum uart ser12_check_uart(unsigned int iobase) 383 { 384 unsigned char b1,b2,b3; 385 enum uart u; 386 enum uart uart_tab[] = 387 { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A }; 388 389 b1 = inb(MCR(iobase)); 390 outb(b1 | 0x10, MCR(iobase)); /* loopback mode */ 391 b2 = inb(MSR(iobase)); 392 outb(0x1a, MCR(iobase)); 393 b3 = inb(MSR(iobase)) & 0xf0; 394 outb(b1, MCR(iobase)); /* restore old values */ 395 outb(b2, MSR(iobase)); 396 if (b3 != 0x90) 397 return c_uart_unknown; 398 inb(RBR(iobase)); 399 inb(RBR(iobase)); 400 outb(0x01, FCR(iobase)); /* enable FIFOs */ 401 u = uart_tab[(inb(IIR(iobase)) >> 6) & 3]; 402 if (u == c_uart_16450) { 403 outb(0x5a, SCR(iobase)); 404 b1 = inb(SCR(iobase)); 405 outb(0xa5, SCR(iobase)); 406 b2 = inb(SCR(iobase)); 407 if ((b1 != 0x5a) || (b2 != 0xa5)) 408 u = c_uart_8250; 409 } 410 return u; 411 } 412 413 /* --------------------------------------------------------------------- */ 414 415 static int ser12_open(struct net_device *dev) 416 { 417 struct baycom_state *bc = netdev_priv(dev); 418 enum uart u; 419 420 if (!dev || !bc) 421 return -ENXIO; 422 if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT || 423 dev->irq < 2 || dev->irq > nr_irqs) { 424 printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) " 425 "or irq (2 <= irq <= %d)\n", 426 0xffff-SER12_EXTENT, nr_irqs); 427 return -ENXIO; 428 } 429 if (bc->baud < 300 || bc->baud > 4800) { 430 printk(KERN_INFO "baycom_ser_fdx: invalid baudrate " 431 "(300...4800)\n"); 432 return -EINVAL; 433 } 434 if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) { 435 printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy\n", 436 dev->base_addr); 437 return -EACCES; 438 } 439 memset(&bc->modem, 0, sizeof(bc->modem)); 440 bc->hdrv.par.bitrate = bc->baud; 441 bc->baud_us = 1000000/bc->baud; 442 bc->baud_uartdiv = (115200/8)/bc->baud; 443 if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown){ 444 release_region(dev->base_addr, SER12_EXTENT); 445 return -EIO; 446 } 447 outb(0, FCR(dev->base_addr)); /* disable FIFOs */ 448 outb(0x0d, MCR(dev->base_addr)); 449 outb(0, IER(dev->base_addr)); 450 if (request_irq(dev->irq, ser12_interrupt, IRQF_SHARED, 451 "baycom_ser_fdx", dev)) { 452 release_region(dev->base_addr, SER12_EXTENT); 453 return -EBUSY; 454 } 455 /* 456 * set the SIO to 6 Bits/character; during receive, 457 * the baud rate is set to produce 100 ints/sec 458 * to feed the channel arbitration process, 459 * during transmit to baud ints/sec to run 460 * the transmitter 461 */ 462 ser12_set_divisor(dev, 115200/100/8); 463 /* 464 * enable transmitter empty interrupt and modem status interrupt 465 */ 466 outb(0x0a, IER(dev->base_addr)); 467 /* 468 * make sure the next interrupt is generated; 469 * 0 must be used to power the modem; the modem draws its 470 * power from the TxD line 471 */ 472 outb(0x00, THR(dev->base_addr)); 473 hdlcdrv_setdcd(&bc->hdrv, 0); 474 printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %s\n", 475 bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]); 476 return 0; 477 } 478 479 /* --------------------------------------------------------------------- */ 480 481 static int ser12_close(struct net_device *dev) 482 { 483 struct baycom_state *bc = netdev_priv(dev); 484 485 if (!dev || !bc) 486 return -EINVAL; 487 /* 488 * disable interrupts 489 */ 490 outb(0, IER(dev->base_addr)); 491 outb(1, MCR(dev->base_addr)); 492 free_irq(dev->irq, dev); 493 release_region(dev->base_addr, SER12_EXTENT); 494 printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n", 495 bc_drvname, dev->base_addr, dev->irq); 496 return 0; 497 } 498 499 /* --------------------------------------------------------------------- */ 500 /* 501 * ===================== hdlcdrv driver interface ========================= 502 */ 503 504 /* --------------------------------------------------------------------- */ 505 506 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, 507 struct hdlcdrv_ioctl *hi, int cmd); 508 509 /* --------------------------------------------------------------------- */ 510 511 static const struct hdlcdrv_ops ser12_ops = { 512 .drvname = bc_drvname, 513 .drvinfo = bc_drvinfo, 514 .open = ser12_open, 515 .close = ser12_close, 516 .ioctl = baycom_ioctl, 517 }; 518 519 /* --------------------------------------------------------------------- */ 520 521 static int baycom_setmode(struct baycom_state *bc, const char *modestr) 522 { 523 unsigned int baud; 524 525 if (!strncmp(modestr, "ser", 3)) { 526 baud = simple_strtoul(modestr+3, NULL, 10); 527 if (baud >= 3 && baud <= 48) 528 bc->baud = baud*100; 529 } 530 if (strchr(modestr, '*')) 531 bc->opt_dcd = 0; 532 else if (strchr(modestr, '+')) 533 bc->opt_dcd = -1; 534 else 535 bc->opt_dcd = 1; 536 return 0; 537 } 538 539 /* --------------------------------------------------------------------- */ 540 541 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, 542 struct hdlcdrv_ioctl *hi, int cmd) 543 { 544 struct baycom_state *bc; 545 struct baycom_ioctl bi; 546 547 if (!dev) 548 return -EINVAL; 549 550 bc = netdev_priv(dev); 551 BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC); 552 553 if (cmd != SIOCDEVPRIVATE) 554 return -ENOIOCTLCMD; 555 switch (hi->cmd) { 556 default: 557 break; 558 559 case HDLCDRVCTL_GETMODE: 560 sprintf(hi->data.modename, "ser%u", bc->baud / 100); 561 if (bc->opt_dcd <= 0) 562 strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+"); 563 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) 564 return -EFAULT; 565 return 0; 566 567 case HDLCDRVCTL_SETMODE: 568 if (netif_running(dev) || !capable(CAP_NET_ADMIN)) 569 return -EACCES; 570 hi->data.modename[sizeof(hi->data.modename)-1] = '\0'; 571 return baycom_setmode(bc, hi->data.modename); 572 573 case HDLCDRVCTL_MODELIST: 574 strcpy(hi->data.modename, "ser12,ser3,ser24"); 575 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) 576 return -EFAULT; 577 return 0; 578 579 case HDLCDRVCTL_MODEMPARMASK: 580 return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ; 581 582 } 583 584 if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi))) 585 return -EFAULT; 586 switch (bi.cmd) { 587 default: 588 return -ENOIOCTLCMD; 589 590 #ifdef BAYCOM_DEBUG 591 case BAYCOMCTL_GETDEBUG: 592 bi.data.dbg.debug1 = bc->hdrv.ptt_keyed; 593 bi.data.dbg.debug2 = bc->debug_vals.last_intcnt; 594 bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr; 595 break; 596 #endif /* BAYCOM_DEBUG */ 597 598 } 599 if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi))) 600 return -EFAULT; 601 return 0; 602 603 } 604 605 /* --------------------------------------------------------------------- */ 606 607 /* 608 * command line settable parameters 609 */ 610 static char *mode[NR_PORTS] = { "ser12*", }; 611 static int iobase[NR_PORTS] = { 0x3f8, }; 612 static int irq[NR_PORTS] = { 4, }; 613 static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 }; 614 615 module_param_array(mode, charp, NULL, 0); 616 MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD"); 617 module_param_hw_array(iobase, int, ioport, NULL, 0); 618 MODULE_PARM_DESC(iobase, "baycom io base address"); 619 module_param_hw_array(irq, int, irq, NULL, 0); 620 MODULE_PARM_DESC(irq, "baycom irq number"); 621 module_param_array(baud, int, NULL, 0); 622 MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)"); 623 624 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); 625 MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver"); 626 MODULE_LICENSE("GPL"); 627 628 /* --------------------------------------------------------------------- */ 629 630 static int __init init_baycomserfdx(void) 631 { 632 int i, found = 0; 633 char set_hw = 1; 634 635 printk(bc_drvinfo); 636 /* 637 * register net devices 638 */ 639 for (i = 0; i < NR_PORTS; i++) { 640 struct net_device *dev; 641 struct baycom_state *bc; 642 char ifname[IFNAMSIZ]; 643 644 sprintf(ifname, "bcsf%d", i); 645 646 if (!mode[i]) 647 set_hw = 0; 648 if (!set_hw) 649 iobase[i] = irq[i] = 0; 650 651 dev = hdlcdrv_register(&ser12_ops, 652 sizeof(struct baycom_state), 653 ifname, iobase[i], irq[i], 0); 654 if (IS_ERR(dev)) 655 break; 656 657 bc = netdev_priv(dev); 658 if (set_hw && baycom_setmode(bc, mode[i])) 659 set_hw = 0; 660 bc->baud = baud[i]; 661 found++; 662 baycom_device[i] = dev; 663 } 664 665 if (!found) 666 return -ENXIO; 667 return 0; 668 } 669 670 static void __exit cleanup_baycomserfdx(void) 671 { 672 int i; 673 674 for(i = 0; i < NR_PORTS; i++) { 675 struct net_device *dev = baycom_device[i]; 676 if (dev) 677 hdlcdrv_unregister(dev); 678 } 679 } 680 681 module_init(init_baycomserfdx); 682 module_exit(cleanup_baycomserfdx); 683 684 /* --------------------------------------------------------------------- */ 685 686 #ifndef MODULE 687 688 /* 689 * format: baycom_ser_fdx=io,irq,mode 690 * mode: ser# hardware DCD 691 * ser#* software DCD 692 * ser#+ hardware DCD, inverted signal at DCD pin 693 * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' 694 */ 695 696 static int __init baycom_ser_fdx_setup(char *str) 697 { 698 static unsigned nr_dev; 699 int ints[4]; 700 701 if (nr_dev >= NR_PORTS) 702 return 0; 703 str = get_options(str, 4, ints); 704 if (ints[0] < 2) 705 return 0; 706 mode[nr_dev] = str; 707 iobase[nr_dev] = ints[1]; 708 irq[nr_dev] = ints[2]; 709 if (ints[0] >= 3) 710 baud[nr_dev] = ints[3]; 711 nr_dev++; 712 return 1; 713 } 714 715 __setup("baycom_ser_fdx=", baycom_ser_fdx_setup); 716 717 #endif /* MODULE */ 718 /* --------------------------------------------------------------------- */ 719