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x86: clean up aperture_64.c
[wandboard.git] / drivers / net / hamradio / baycom_ser_fdx.c
blob17ac6975d70db9d0d1fdbe35487c03a2a1d1fa38
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 /* --------------------------------------------------------------------- */
WandBoard kernel