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Import 2.3.10pre5
[davej-history.git] / drivers / net / hamradio / baycom_ser_fdx.c
blob216855a4c24e2839162c4e8a9f1d2a62e6fa5af9
1 /*****************************************************************************/
2
3 /*
4 * baycom_ser_fdx.c -- baycom ser12 fullduplex radio modem driver.
5 *
6 * Copyright (C) 1997-1998 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 * enables software DCD.
49 * iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8
50 * baud baud rate (between 300 and 4800)
51 * irq interrupt line of the port; common values are 4,3
52 *
53 *
54 * History:
55 * 0.1 26.06.96 Adapted from baycom.c and made network driver interface
56 * 18.10.96 Changed to new user space access routines (copy_{to,from}_user)
57 * 0.3 26.04.97 init code/data tagged
58 * 0.4 08.07.97 alternative ser12 decoding algorithm (uses delta CTS ints)
59 * 0.5 11.11.97 ser12/par96 split into separate files
60 * 0.6 24.01.98 Thorsten Kranzkowski, dl8bcu and Thomas Sailer:
61 * reduced interrupt load in transmit case
62 * reworked receiver
63 */
64
65 /*****************************************************************************/
66
67 #include <linux/module.h>
68 #include <linux/kernel.h>
69 #include <linux/sched.h>
70 #include <linux/types.h>
71 #include <linux/fcntl.h>
72 #include <linux/interrupt.h>
73 #include <linux/ioport.h>
74 #include <linux/in.h>
75 #include <linux/string.h>
76 #include <linux/init.h>
77 #include <linux/bitops.h>
78 #include <asm/uaccess.h>
79 #include <asm/system.h>
80 #include <asm/io.h>
81 #include <linux/delay.h>
82 #include <linux/errno.h>
83 #include <linux/netdevice.h>
84 #include <linux/hdlcdrv.h>
85 #include <linux/baycom.h>
86 #include <linux/version.h>
87
88 /* --------------------------------------------------------------------- */
89
90 #define BAYCOM_DEBUG
91
92 /*
93 * modem options; bit mask
94 */
95 #define BAYCOM_OPTIONS_SOFTDCD 1
96
97 /* --------------------------------------------------------------------- */
98
99 static const char bc_drvname[] = "baycom_ser_fdx";
100 static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1997-1998 Thomas Sailer, HB9JNX/AE4WA\n"
101 KERN_INFO "baycom_ser_fdx: version 0.6 compiled " __TIME__ " " __DATE__ "\n";
102
103 /* --------------------------------------------------------------------- */
104
105 #define NR_PORTS 4
106
107 static struct device baycom_device[NR_PORTS];
108
109 static struct {
110 char *mode;
111 int iobase, irq, baud;
112 } baycom_ports[NR_PORTS] = { { NULL, 0, 0 }, };
113
114 /* --------------------------------------------------------------------- */
115
116 #define RBR(iobase) (iobase+0)
117 #define THR(iobase) (iobase+0)
118 #define IER(iobase) (iobase+1)
119 #define IIR(iobase) (iobase+2)
120 #define FCR(iobase) (iobase+2)
121 #define LCR(iobase) (iobase+3)
122 #define MCR(iobase) (iobase+4)
123 #define LSR(iobase) (iobase+5)
124 #define MSR(iobase) (iobase+6)
125 #define SCR(iobase) (iobase+7)
126 #define DLL(iobase) (iobase+0)
127 #define DLM(iobase) (iobase+1)
128
129 #define SER12_EXTENT 8
130
131 /* ---------------------------------------------------------------------- */
132 /*
133 * Information that need to be kept for each board.
134 */
135
136 struct baycom_state {
137 struct hdlcdrv_state hdrv;
138
139 unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout;
140 unsigned int options;
141
142 struct modem_state {
143 unsigned char flags;
144 unsigned char ptt;
145 unsigned int shreg;
146 struct modem_state_ser12 {
147 unsigned char tx_bit;
148 unsigned char last_rxbit;
149 int dcd_sum0, dcd_sum1, dcd_sum2;
150 int dcd_time;
151 unsigned int pll_time;
152 unsigned int txshreg;
153 } ser12;
154 } modem;
155
156 #ifdef BAYCOM_DEBUG
157 struct debug_vals {
158 unsigned long last_jiffies;
159 unsigned cur_intcnt;
160 unsigned last_intcnt;
161 int cur_pllcorr;
162 int last_pllcorr;
163 } debug_vals;
164 #endif /* BAYCOM_DEBUG */
165 };
166
167 /* --------------------------------------------------------------------- */
168
169 #define min(a, b) (((a) < (b)) ? (a) : (b))
170 #define max(a, b) (((a) > (b)) ? (a) : (b))
171
172 /* --------------------------------------------------------------------- */
173
174 static void inline baycom_int_freq(struct baycom_state *bc)
175 {
176 #ifdef BAYCOM_DEBUG
177 unsigned long cur_jiffies = jiffies;
178 /*
179 * measure the interrupt frequency
180 */
181 bc->debug_vals.cur_intcnt++;
182 if ((cur_jiffies - bc->debug_vals.last_jiffies) >= HZ) {
183 bc->debug_vals.last_jiffies = cur_jiffies;
184 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
185 bc->debug_vals.cur_intcnt = 0;
186 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
187 bc->debug_vals.cur_pllcorr = 0;
188 }
189 #endif /* BAYCOM_DEBUG */
190 }
191
192 /* --------------------------------------------------------------------- */
193 /*
194 * ===================== SER12 specific routines =========================
195 */
196
197 /* --------------------------------------------------------------------- */
198
199 static inline void ser12_set_divisor(struct device *dev,
200 unsigned int divisor)
201 {
202 outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */
203 outb(divisor, DLL(dev->base_addr));
204 outb(divisor >> 8, DLM(dev->base_addr));
205 outb(0x01, LCR(dev->base_addr)); /* word length = 6 */
206 /*
207 * make sure the next interrupt is generated;
208 * 0 must be used to power the modem; the modem draws its
209 * power from the TxD line
210 */
211 outb(0x00, THR(dev->base_addr));
212 /*
213 * it is important not to set the divider while transmitting;
214 * this reportedly makes some UARTs generating interrupts
215 * in the hundredthousands per second region
216 * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno)
217 */
218 }
219
220 /* --------------------------------------------------------------------- */
221
222 #if 0
223 extern inline unsigned int hweight16(unsigned int w)
224 __attribute__ ((unused));
225 extern inline unsigned int hweight8(unsigned int w)
226 __attribute__ ((unused));
227
228 extern inline unsigned int hweight16(unsigned int w)
229 {
230 unsigned short res = (w & 0x5555) + ((w >> 1) & 0x5555);
231 res = (res & 0x3333) + ((res >> 2) & 0x3333);
232 res = (res & 0x0F0F) + ((res >> 4) & 0x0F0F);
233 return (res & 0x00FF) + ((res >> 8) & 0x00FF);
234 }
235
236 extern inline unsigned int hweight8(unsigned int w)
237 {
238 unsigned short res = (w & 0x55) + ((w >> 1) & 0x55);
239 res = (res & 0x33) + ((res >> 2) & 0x33);
240 return (res & 0x0F) + ((res >> 4) & 0x0F);
241 }
242 #endif
243
244 /* --------------------------------------------------------------------- */
245
246 static __inline__ void ser12_rx(struct device *dev, struct baycom_state *bc, struct timeval *tv, unsigned char curs)
247 {
248 int timediff;
249 int bdus8 = bc->baud_us >> 3;
250 int bdus4 = bc->baud_us >> 2;
251 int bdus2 = bc->baud_us >> 1;
252
253 timediff = 1000000 + tv->tv_usec - bc->modem.ser12.pll_time;
254 while (timediff >= 500000)
255 timediff -= 1000000;
256 while (timediff >= bdus2) {
257 timediff -= bc->baud_us;
258 bc->modem.ser12.pll_time += bc->baud_us;
259 bc->modem.ser12.dcd_time--;
260 /* first check if there is room to add a bit */
261 if (bc->modem.shreg & 1) {
262 hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff);
263 bc->modem.shreg = 0x10000;
264 }
265 /* add a one bit */
266 bc->modem.shreg >>= 1;
267 }
268 if (bc->modem.ser12.dcd_time <= 0) {
269 if (bc->options & BAYCOM_OPTIONS_SOFTDCD)
270 hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 +
271 bc->modem.ser12.dcd_sum1 +
272 bc->modem.ser12.dcd_sum2) < 0);
273 bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1;
274 bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0;
275 bc->modem.ser12.dcd_sum0 = 2; /* slight bias */
276 bc->modem.ser12.dcd_time += 120;
277 }
278 if (bc->modem.ser12.last_rxbit != curs) {
279 bc->modem.ser12.last_rxbit = curs;
280 bc->modem.shreg |= 0x10000;
281 /* adjust the PLL */
282 if (timediff > 0)
283 bc->modem.ser12.pll_time += bdus8;
284 else
285 bc->modem.ser12.pll_time += 1000000 - bdus8;
286 /* update DCD */
287 if (abs(timediff) > bdus4)
288 bc->modem.ser12.dcd_sum0 += 4;
289 else
290 bc->modem.ser12.dcd_sum0--;
291 #ifdef BAYCOM_DEBUG
292 bc->debug_vals.cur_pllcorr = timediff;
293 #endif /* BAYCOM_DEBUG */
294 }
295 while (bc->modem.ser12.pll_time >= 1000000)
296 bc->modem.ser12.pll_time -= 1000000;
297 }
298
299 /* --------------------------------------------------------------------- */
300
301 static void ser12_interrupt(int irq, void *dev_id, struct pt_regs *regs)
302 {
303 struct device *dev = (struct device *)dev_id;
304 struct baycom_state *bc = (struct baycom_state *)dev->priv;
305 struct timeval tv;
306 unsigned char iir, msr;
307 unsigned int txcount = 0;
308
309 if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC)
310 return;
311 /* fast way out for shared irq */
312 if ((iir = inb(IIR(dev->base_addr))) & 1)
313 return;
314 /* get current time */
315 do_gettimeofday(&tv);
316 msr = inb(MSR(dev->base_addr));
317 /* delta DCD */
318 if ((msr & 8) && !(bc->options & BAYCOM_OPTIONS_SOFTDCD))
319 hdlcdrv_setdcd(&bc->hdrv, !(msr & 0x80));
320 do {
321 switch (iir & 6) {
322 case 6:
323 inb(LSR(dev->base_addr));
324 break;
325
326 case 4:
327 inb(RBR(dev->base_addr));
328 break;
329
330 case 2:
331 /*
332 * make sure the next interrupt is generated;
333 * 0 must be used to power the modem; the modem draws its
334 * power from the TxD line
335 */
336 outb(0x00, THR(dev->base_addr));
337 baycom_int_freq(bc);
338 txcount++;
339 /*
340 * first output the last bit (!) then call HDLC transmitter,
341 * since this may take quite long
342 */
343 if (bc->modem.ptt)
344 outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr));
345 else
346 outb(0x0d, MCR(dev->base_addr)); /* transmitter off */
347 break;
348
349 default:
350 msr = inb(MSR(dev->base_addr));
351 /* delta DCD */
352 if ((msr & 8) && !(bc->options & BAYCOM_OPTIONS_SOFTDCD))
353 hdlcdrv_setdcd(&bc->hdrv, !(msr & 0x80));
354 break;
355 }
356 iir = inb(IIR(dev->base_addr));
357 } while (!(iir & 1));
358 ser12_rx(dev, bc, &tv, msr & 0x10); /* CTS */
359 if (bc->modem.ptt && txcount) {
360 if (bc->modem.ser12.txshreg <= 1) {
361 bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv);
362 if (!hdlcdrv_ptt(&bc->hdrv)) {
363 ser12_set_divisor(dev, 115200/100/8);
364 bc->modem.ptt = 0;
365 goto end_transmit;
366 }
367 }
368 bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1));
369 bc->modem.ser12.txshreg >>= 1;
370 }
371 end_transmit:
372 __sti();
373 if (!bc->modem.ptt && txcount) {
374 hdlcdrv_arbitrate(dev, &bc->hdrv);
375 if (hdlcdrv_ptt(&bc->hdrv)) {
376 ser12_set_divisor(dev, bc->baud_uartdiv);
377 bc->modem.ser12.txshreg = 1;
378 bc->modem.ptt = 1;
379 }
380 }
381 hdlcdrv_transmitter(dev, &bc->hdrv);
382 hdlcdrv_receiver(dev, &bc->hdrv);
383 __cli();
384 }
385
386 /* --------------------------------------------------------------------- */
387
388 enum uart { c_uart_unknown, c_uart_8250,
389 c_uart_16450, c_uart_16550, c_uart_16550A};
390 static const char *uart_str[] = {
391 "unknown", "8250", "16450", "16550", "16550A"
392 };
393
394 static enum uart ser12_check_uart(unsigned int iobase)
395 {
396 unsigned char b1,b2,b3;
397 enum uart u;
398 enum uart uart_tab[] =
399 { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A };
400
401 b1 = inb(MCR(iobase));
402 outb(b1 | 0x10, MCR(iobase)); /* loopback mode */
403 b2 = inb(MSR(iobase));
404 outb(0x1a, MCR(iobase));
405 b3 = inb(MSR(iobase)) & 0xf0;
406 outb(b1, MCR(iobase)); /* restore old values */
407 outb(b2, MSR(iobase));
408 if (b3 != 0x90)
409 return c_uart_unknown;
410 inb(RBR(iobase));
411 inb(RBR(iobase));
412 outb(0x01, FCR(iobase)); /* enable FIFOs */
413 u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
414 if (u == c_uart_16450) {
415 outb(0x5a, SCR(iobase));
416 b1 = inb(SCR(iobase));
417 outb(0xa5, SCR(iobase));
418 b2 = inb(SCR(iobase));
419 if ((b1 != 0x5a) || (b2 != 0xa5))
420 u = c_uart_8250;
421 }
422 return u;
423 }
424
425 /* --------------------------------------------------------------------- */
426
427 static int ser12_open(struct device *dev)
428 {
429 struct baycom_state *bc = (struct baycom_state *)dev->priv;
430 enum uart u;
431
432 if (!dev || !bc)
433 return -ENXIO;
434 if (!dev->base_addr || dev->base_addr > 0x1000-SER12_EXTENT ||
435 dev->irq < 2 || dev->irq > 15)
436 return -ENXIO;
437 if (bc->baud < 300 || bc->baud > 4800)
438 return -EINVAL;
439 if (check_region(dev->base_addr, SER12_EXTENT))
440 return -EACCES;
441 memset(&bc->modem, 0, sizeof(bc->modem));
442 bc->hdrv.par.bitrate = bc->baud;
443 bc->baud_us = 1000000/bc->baud;
444 bc->baud_uartdiv = (115200/8)/bc->baud;
445 if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown)
446 return -EIO;
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, SA_INTERRUPT | SA_SHIRQ,
451 "baycom_ser_fdx", dev))
452 return -EBUSY;
453 request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx");
454 /*
455 * set the SIO to 6 Bits/character; during receive,
456 * the baud rate is set to produce 100 ints/sec
457 * to feed the channel arbitration process,
458 * during transmit to baud ints/sec to run
459 * the transmitter
460 */
461 ser12_set_divisor(dev, 115200/100/8);
462 /*
463 * enable transmitter empty interrupt and modem status interrupt
464 */
465 outb(0x0a, IER(dev->base_addr));
466 /*
467 * make sure the next interrupt is generated;
468 * 0 must be used to power the modem; the modem draws its
469 * power from the TxD line
470 */
471 outb(0x00, THR(dev->base_addr));
472 hdlcdrv_setdcd(&bc->hdrv, 0);
473 printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u options "
474 "0x%x baud %u uart %s\n", bc_drvname, dev->base_addr, dev->irq,
475 bc->options, bc->baud, uart_str[u]);
476 MOD_INC_USE_COUNT;
477 return 0;
478 }
479
480 /* --------------------------------------------------------------------- */
481
482 static int ser12_close(struct device *dev)
483 {
484 struct baycom_state *bc = (struct baycom_state *)dev->priv;
485
486 if (!dev || !bc)
487 return -EINVAL;
488 /*
489 * disable interrupts
490 */
491 outb(0, IER(dev->base_addr));
492 outb(1, MCR(dev->base_addr));
493 free_irq(dev->irq, dev);
494 release_region(dev->base_addr, SER12_EXTENT);
495 printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n",
496 bc_drvname, dev->base_addr, dev->irq);
497 MOD_DEC_USE_COUNT;
498 return 0;
499 }
500
501 /* --------------------------------------------------------------------- */
502 /*
503 * ===================== hdlcdrv driver interface =========================
504 */
505
506 /* --------------------------------------------------------------------- */
507
508 static int baycom_ioctl(struct device *dev, struct ifreq *ifr,
509 struct hdlcdrv_ioctl *hi, int cmd);
510
511 /* --------------------------------------------------------------------- */
512
513 static struct hdlcdrv_ops ser12_ops = {
514 bc_drvname,
515 bc_drvinfo,
516 ser12_open,
517 ser12_close,
518 baycom_ioctl
519 };
520
521 /* --------------------------------------------------------------------- */
522
523 static int baycom_setmode(struct baycom_state *bc, const char *modestr)
524 {
525 unsigned int baud;
526
527 if (!strncmp(modestr, "ser", 3)) {
528 baud = simple_strtoul(modestr+3, NULL, 10);
529 if (baud >= 3 && baud <= 48)
530 bc->baud = baud*100;
531 }
532 bc->options = !!strchr(modestr, '*');
533 return 0;
534 }
535
536 /* --------------------------------------------------------------------- */
537
538 static int baycom_ioctl(struct device *dev, struct ifreq *ifr,
539 struct hdlcdrv_ioctl *hi, int cmd)
540 {
541 struct baycom_state *bc;
542 struct baycom_ioctl bi;
543 int cmd2;
544
545 if (!dev || !dev->priv ||
546 ((struct baycom_state *)dev->priv)->hdrv.magic != HDLCDRV_MAGIC) {
547 printk(KERN_ERR "bc_ioctl: invalid device struct\n");
548 return -EINVAL;
549 }
550 bc = (struct baycom_state *)dev->priv;
551
552 if (cmd != SIOCDEVPRIVATE)
553 return -ENOIOCTLCMD;
554 if (get_user(cmd2, (int *)ifr->ifr_data))
555 return -EFAULT;
556 switch (hi->cmd) {
557 default:
558 break;
559
560 case HDLCDRVCTL_GETMODE:
561 sprintf(hi->data.modename, "ser%u", bc->baud / 100);
562 if (bc->options & 1)
563 strcat(hi->data.modename, "*");
564 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl)))
565 return -EFAULT;
566 return 0;
567
568 case HDLCDRVCTL_SETMODE:
569 if (dev->start || !suser())
570 return -EACCES;
571 hi->data.modename[sizeof(hi->data.modename)-1] = '\0';
572 return baycom_setmode(bc, hi->data.modename);
573
574 case HDLCDRVCTL_MODELIST:
575 strcpy(hi->data.modename, "ser12,ser3,ser24");
576 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl)))
577 return -EFAULT;
578 return 0;
579
580 case HDLCDRVCTL_MODEMPARMASK:
581 return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ;
582
583 }
584
585 if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi)))
586 return -EFAULT;
587 switch (bi.cmd) {
588 default:
589 return -ENOIOCTLCMD;
590
591 #ifdef BAYCOM_DEBUG
592 case BAYCOMCTL_GETDEBUG:
593 bi.data.dbg.debug1 = bc->hdrv.ptt_keyed;
594 bi.data.dbg.debug2 = bc->debug_vals.last_intcnt;
595 bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr;
596 break;
597 #endif /* BAYCOM_DEBUG */
598
599 }
600 if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi)))
601 return -EFAULT;
602 return 0;
603
604 }
605
606 /* --------------------------------------------------------------------- */
607
608 int __init baycom_ser_fdx_init(void)
609 {
610 int i, j, found = 0;
611 char set_hw = 1;
612 struct baycom_state *bc;
613 char ifname[HDLCDRV_IFNAMELEN];
614
615
616 printk(bc_drvinfo);
617 /*
618 * register net devices
619 */
620 for (i = 0; i < NR_PORTS; i++) {
621 struct device *dev = baycom_device+i;
622 sprintf(ifname, "bcsf%d", i);
623
624 if (!baycom_ports[i].mode)
625 set_hw = 0;
626 if (!set_hw)
627 baycom_ports[i].iobase = baycom_ports[i].irq = 0;
628 j = hdlcdrv_register_hdlcdrv(dev, &ser12_ops,
629 sizeof(struct baycom_state),
630 ifname, baycom_ports[i].iobase,
631 baycom_ports[i].irq, 0);
632 if (!j) {
633 bc = (struct baycom_state *)dev->priv;
634 if (set_hw && baycom_setmode(bc, baycom_ports[i].mode))
635 set_hw = 0;
636 bc->baud = baycom_ports[i].baud;
637 found++;
638 } else {
639 printk(KERN_WARNING "%s: cannot register net device\n",
640 bc_drvname);
641 }
642 }
643 if (!found)
644 return -ENXIO;
645 return 0;
646 }
647
648 /* --------------------------------------------------------------------- */
649
650 #ifdef MODULE
651
652 /*
653 * command line settable parameters
654 */
655 static char *mode[NR_PORTS] = { "ser12*", };
656 static int iobase[NR_PORTS] = { 0x3f8, };
657 static int irq[NR_PORTS] = { 4, };
658 static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 };
659
660 #if LINUX_VERSION_CODE >= 0x20115
661
662 MODULE_PARM(mode, "1-" __MODULE_STRING(NR_PORTS) "s");
663 MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD");
664 MODULE_PARM(iobase, "1-" __MODULE_STRING(NR_PORTS) "i");
665 MODULE_PARM_DESC(iobase, "baycom io base address");
666 MODULE_PARM(irq, "1-" __MODULE_STRING(NR_PORTS) "i");
667 MODULE_PARM_DESC(irq, "baycom irq number");
668 MODULE_PARM(baud, "1-" __MODULE_STRING(NR_PORTS) "i");
669 MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)");
670
671 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
672 MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver");
673
674 #endif
675
676 int __init init_module(void)
677 {
678 int i;
679
680 for (i = 0; (i < NR_PORTS) && (mode[i]); i++) {
681 baycom_ports[i].mode = mode[i];
682 baycom_ports[i].iobase = iobase[i];
683 baycom_ports[i].irq = irq[i];
684 baycom_ports[i].baud = baud[i];
685 }
686 if (i < NR_PORTS-1)
687 baycom_ports[i+1].mode = NULL;
688 return baycom_ser_fdx_init();
689 }
690
691 /* --------------------------------------------------------------------- */
692
693 void cleanup_module(void)
694 {
695 int i;
696
697 for(i = 0; i < NR_PORTS; i++) {
698 struct device *dev = baycom_device+i;
699 struct baycom_state *bc = (struct baycom_state *)dev->priv;
700
701 if (bc) {
702 if (bc->hdrv.magic != HDLCDRV_MAGIC)
703 printk(KERN_ERR "baycom: invalid magic in "
704 "cleanup_module\n");
705 else
706 hdlcdrv_unregister_hdlcdrv(dev);
707 }
708 }
709 }
710
711 #else /* MODULE */
712 /* --------------------------------------------------------------------- */
713 /*
714 * format: baycom_ser_fdx=io,irq,mode
715 * mode: [*]
716 * * indicates sofware DCD
717 */
718
719 void __init baycom_ser_fdx_setup(char *str, int *ints)
720 {
721 int i;
722
723 for (i = 0; (i < NR_PORTS) && (baycom_ports[i].mode); i++);
724 if ((i >= NR_PORTS) || (ints[0] < 2)) {
725 printk(KERN_INFO "%s: too many or invalid interface "
726 "specifications\n", bc_drvname);
727 return;
728 }
729 baycom_ports[i].mode = str;
730 baycom_ports[i].iobase = ints[1];
731 baycom_ports[i].irq = ints[2];
732 if (ints[0] >= 3)
733 baycom_ports[i].baud = ints[3];
734 else
735 baycom_ports[i].baud = 1200;
736 if (i < NR_PORTS-1)
737 baycom_ports[i+1].mode = NULL;
738 }
739
740 #endif /* MODULE */
741 /* --------------------------------------------------------------------- */
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