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jbd2: Annotate transaction start also for jbd2_journal_restart()
[linux/fpc-iii.git] / drivers / net / hamradio / baycom_ser_hdx.c
blob88c59359602029440c00c947cb77f3351e23ef54
1 /*****************************************************************************/
2
3 /*
4 * baycom_ser_hdx.c -- baycom ser12 halfduplex 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 *
38 * Command line options (insmod command line)
39 *
40 * mode ser12 hardware DCD
41 * ser12* software DCD
42 * ser12@ hardware/software DCD, i.e. no explicit DCD signal but hardware
43 * mutes audio input to the modem
44 * ser12+ hardware DCD, inverted signal at DCD pin
45 * iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8
46 * irq interrupt line of the port; common values are 4,3
47 *
48 *
49 * History:
50 * 0.1 26.06.1996 Adapted from baycom.c and made network driver interface
51 * 18.10.1996 Changed to new user space access routines (copy_{to,from}_user)
52 * 0.3 26.04.1997 init code/data tagged
53 * 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints)
54 * 0.5 11.11.1997 ser12/par96 split into separate files
55 * 0.6 14.04.1998 cleanups
56 * 0.7 03.08.1999 adapt to Linus' new __setup/__initcall
57 * 0.8 10.08.1999 use module_init/module_exit
58 * 0.9 12.02.2000 adapted to softnet driver interface
59 * 0.10 03.07.2000 fix interface name handling
60 */
61
62 /*****************************************************************************/
63
64 #include <linux/module.h>
65 #include <linux/ioport.h>
66 #include <linux/string.h>
67 #include <linux/init.h>
68 #include <asm/uaccess.h>
69 #include <asm/io.h>
70 #include <linux/hdlcdrv.h>
71 #include <linux/baycom.h>
72 #include <linux/jiffies.h>
73
74 /* --------------------------------------------------------------------- */
75
76 #define BAYCOM_DEBUG
77
78 /* --------------------------------------------------------------------- */
79
80 static const char bc_drvname[] = "baycom_ser_hdx";
81 static const char bc_drvinfo[] = KERN_INFO "baycom_ser_hdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n"
82 "baycom_ser_hdx: version 0.10 compiled " __TIME__ " " __DATE__ "\n";
83
84 /* --------------------------------------------------------------------- */
85
86 #define NR_PORTS 4
87
88 static struct net_device *baycom_device[NR_PORTS];
89
90 /* --------------------------------------------------------------------- */
91
92 #define RBR(iobase) (iobase+0)
93 #define THR(iobase) (iobase+0)
94 #define IER(iobase) (iobase+1)
95 #define IIR(iobase) (iobase+2)
96 #define FCR(iobase) (iobase+2)
97 #define LCR(iobase) (iobase+3)
98 #define MCR(iobase) (iobase+4)
99 #define LSR(iobase) (iobase+5)
100 #define MSR(iobase) (iobase+6)
101 #define SCR(iobase) (iobase+7)
102 #define DLL(iobase) (iobase+0)
103 #define DLM(iobase) (iobase+1)
104
105 #define SER12_EXTENT 8
106
107 /* ---------------------------------------------------------------------- */
108 /*
109 * Information that need to be kept for each board.
110 */
111
112 struct baycom_state {
113 struct hdlcdrv_state hdrv;
114
115 int opt_dcd;
116
117 struct modem_state {
118 short arb_divider;
119 unsigned char flags;
120 unsigned int shreg;
121 struct modem_state_ser12 {
122 unsigned char tx_bit;
123 int dcd_sum0, dcd_sum1, dcd_sum2;
124 unsigned char last_sample;
125 unsigned char last_rxbit;
126 unsigned int dcd_shreg;
127 unsigned int dcd_time;
128 unsigned int bit_pll;
129 unsigned char interm_sample;
130 } ser12;
131 } modem;
132
133 #ifdef BAYCOM_DEBUG
134 struct debug_vals {
135 unsigned long last_jiffies;
136 unsigned cur_intcnt;
137 unsigned last_intcnt;
138 int cur_pllcorr;
139 int last_pllcorr;
140 } debug_vals;
141 #endif /* BAYCOM_DEBUG */
142 };
143
144 /* --------------------------------------------------------------------- */
145
146 static inline void baycom_int_freq(struct baycom_state *bc)
147 {
148 #ifdef BAYCOM_DEBUG
149 unsigned long cur_jiffies = jiffies;
150 /*
151 * measure the interrupt frequency
152 */
153 bc->debug_vals.cur_intcnt++;
154 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
155 bc->debug_vals.last_jiffies = cur_jiffies;
156 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
157 bc->debug_vals.cur_intcnt = 0;
158 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
159 bc->debug_vals.cur_pllcorr = 0;
160 }
161 #endif /* BAYCOM_DEBUG */
162 }
163
164 /* --------------------------------------------------------------------- */
165 /*
166 * ===================== SER12 specific routines =========================
167 */
168
169 static inline void ser12_set_divisor(struct net_device *dev,
170 unsigned char divisor)
171 {
172 outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */
173 outb(divisor, DLL(dev->base_addr));
174 outb(0, DLM(dev->base_addr));
175 outb(0x01, LCR(dev->base_addr)); /* word length = 6 */
176 /*
177 * make sure the next interrupt is generated;
178 * 0 must be used to power the modem; the modem draws its
179 * power from the TxD line
180 */
181 outb(0x00, THR(dev->base_addr));
182 /*
183 * it is important not to set the divider while transmitting;
184 * this reportedly makes some UARTs generating interrupts
185 * in the hundredthousands per second region
186 * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno)
187 */
188 }
189
190 /* --------------------------------------------------------------------- */
191
192 /*
193 * must call the TX arbitrator every 10ms
194 */
195 #define SER12_ARB_DIVIDER(bc) (bc->opt_dcd ? 24 : 36)
196
197 #define SER12_DCD_INTERVAL(bc) (bc->opt_dcd ? 12 : 240)
198
199 static inline void ser12_tx(struct net_device *dev, struct baycom_state *bc)
200 {
201 /* one interrupt per channel bit */
202 ser12_set_divisor(dev, 12);
203 /*
204 * first output the last bit (!) then call HDLC transmitter,
205 * since this may take quite long
206 */
207 outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr));
208 if (bc->modem.shreg <= 1)
209 bc->modem.shreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv);
210 bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^
211 (bc->modem.shreg & 1));
212 bc->modem.shreg >>= 1;
213 }
214
215 /* --------------------------------------------------------------------- */
216
217 static inline void ser12_rx(struct net_device *dev, struct baycom_state *bc)
218 {
219 unsigned char cur_s;
220 /*
221 * do demodulator
222 */
223 cur_s = inb(MSR(dev->base_addr)) & 0x10; /* the CTS line */
224 hdlcdrv_channelbit(&bc->hdrv, cur_s);
225 bc->modem.ser12.dcd_shreg = (bc->modem.ser12.dcd_shreg << 1) |
226 (cur_s != bc->modem.ser12.last_sample);
227 bc->modem.ser12.last_sample = cur_s;
228 if(bc->modem.ser12.dcd_shreg & 1) {
229 if (!bc->opt_dcd) {
230 unsigned int dcdspos, dcdsneg;
231
232 dcdspos = dcdsneg = 0;
233 dcdspos += ((bc->modem.ser12.dcd_shreg >> 1) & 1);
234 if (!(bc->modem.ser12.dcd_shreg & 0x7ffffffe))
235 dcdspos += 2;
236 dcdsneg += ((bc->modem.ser12.dcd_shreg >> 2) & 1);
237 dcdsneg += ((bc->modem.ser12.dcd_shreg >> 3) & 1);
238 dcdsneg += ((bc->modem.ser12.dcd_shreg >> 4) & 1);
239
240 bc->modem.ser12.dcd_sum0 += 16*dcdspos - dcdsneg;
241 } else
242 bc->modem.ser12.dcd_sum0--;
243 }
244 if(!bc->modem.ser12.dcd_time) {
245 hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 +
246 bc->modem.ser12.dcd_sum1 +
247 bc->modem.ser12.dcd_sum2) < 0);
248 bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1;
249 bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0;
250 /* offset to ensure DCD off on silent input */
251 bc->modem.ser12.dcd_sum0 = 2;
252 bc->modem.ser12.dcd_time = SER12_DCD_INTERVAL(bc);
253 }
254 bc->modem.ser12.dcd_time--;
255 if (!bc->opt_dcd) {
256 /*
257 * PLL code for the improved software DCD algorithm
258 */
259 if (bc->modem.ser12.interm_sample) {
260 /*
261 * intermediate sample; set timing correction to normal
262 */
263 ser12_set_divisor(dev, 4);
264 } else {
265 /*
266 * do PLL correction and call HDLC receiver
267 */
268 switch (bc->modem.ser12.dcd_shreg & 7) {
269 case 1: /* transition too late */
270 ser12_set_divisor(dev, 5);
271 #ifdef BAYCOM_DEBUG
272 bc->debug_vals.cur_pllcorr++;
273 #endif /* BAYCOM_DEBUG */
274 break;
275 case 4: /* transition too early */
276 ser12_set_divisor(dev, 3);
277 #ifdef BAYCOM_DEBUG
278 bc->debug_vals.cur_pllcorr--;
279 #endif /* BAYCOM_DEBUG */
280 break;
281 default:
282 ser12_set_divisor(dev, 4);
283 break;
284 }
285 bc->modem.shreg >>= 1;
286 if (bc->modem.ser12.last_sample ==
287 bc->modem.ser12.last_rxbit)
288 bc->modem.shreg |= 0x10000;
289 bc->modem.ser12.last_rxbit =
290 bc->modem.ser12.last_sample;
291 }
292 if (++bc->modem.ser12.interm_sample >= 3)
293 bc->modem.ser12.interm_sample = 0;
294 /*
295 * DCD stuff
296 */
297 if (bc->modem.ser12.dcd_shreg & 1) {
298 unsigned int dcdspos, dcdsneg;
299
300 dcdspos = dcdsneg = 0;
301 dcdspos += ((bc->modem.ser12.dcd_shreg >> 1) & 1);
302 dcdspos += (!(bc->modem.ser12.dcd_shreg & 0x7ffffffe))
303 << 1;
304 dcdsneg += ((bc->modem.ser12.dcd_shreg >> 2) & 1);
305 dcdsneg += ((bc->modem.ser12.dcd_shreg >> 3) & 1);
306 dcdsneg += ((bc->modem.ser12.dcd_shreg >> 4) & 1);
307
308 bc->modem.ser12.dcd_sum0 += 16*dcdspos - dcdsneg;
309 }
310 } else {
311 /*
312 * PLL algorithm for the hardware squelch DCD algorithm
313 */
314 if (bc->modem.ser12.interm_sample) {
315 /*
316 * intermediate sample; set timing correction to normal
317 */
318 ser12_set_divisor(dev, 6);
319 } else {
320 /*
321 * do PLL correction and call HDLC receiver
322 */
323 switch (bc->modem.ser12.dcd_shreg & 3) {
324 case 1: /* transition too late */
325 ser12_set_divisor(dev, 7);
326 #ifdef BAYCOM_DEBUG
327 bc->debug_vals.cur_pllcorr++;
328 #endif /* BAYCOM_DEBUG */
329 break;
330 case 2: /* transition too early */
331 ser12_set_divisor(dev, 5);
332 #ifdef BAYCOM_DEBUG
333 bc->debug_vals.cur_pllcorr--;
334 #endif /* BAYCOM_DEBUG */
335 break;
336 default:
337 ser12_set_divisor(dev, 6);
338 break;
339 }
340 bc->modem.shreg >>= 1;
341 if (bc->modem.ser12.last_sample ==
342 bc->modem.ser12.last_rxbit)
343 bc->modem.shreg |= 0x10000;
344 bc->modem.ser12.last_rxbit =
345 bc->modem.ser12.last_sample;
346 }
347 bc->modem.ser12.interm_sample = !bc->modem.ser12.interm_sample;
348 /*
349 * DCD stuff
350 */
351 bc->modem.ser12.dcd_sum0 -= (bc->modem.ser12.dcd_shreg & 1);
352 }
353 outb(0x0d, MCR(dev->base_addr)); /* transmitter off */
354 if (bc->modem.shreg & 1) {
355 hdlcdrv_putbits(&bc->hdrv, bc->modem.shreg >> 1);
356 bc->modem.shreg = 0x10000;
357 }
358 if(!bc->modem.ser12.dcd_time) {
359 if (bc->opt_dcd & 1)
360 hdlcdrv_setdcd(&bc->hdrv, !((inb(MSR(dev->base_addr)) ^ bc->opt_dcd) & 0x80));
361 else
362 hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 +
363 bc->modem.ser12.dcd_sum1 +
364 bc->modem.ser12.dcd_sum2) < 0);
365 bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1;
366 bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0;
367 /* offset to ensure DCD off on silent input */
368 bc->modem.ser12.dcd_sum0 = 2;
369 bc->modem.ser12.dcd_time = SER12_DCD_INTERVAL(bc);
370 }
371 bc->modem.ser12.dcd_time--;
372 }
373
374 /* --------------------------------------------------------------------- */
375
376 static irqreturn_t ser12_interrupt(int irq, void *dev_id)
377 {
378 struct net_device *dev = (struct net_device *)dev_id;
379 struct baycom_state *bc = netdev_priv(dev);
380 unsigned char iir;
381
382 if (!dev || !bc || bc->hdrv.magic != HDLCDRV_MAGIC)
383 return IRQ_NONE;
384 /* fast way out */
385 if ((iir = inb(IIR(dev->base_addr))) & 1)
386 return IRQ_NONE;
387 baycom_int_freq(bc);
388 do {
389 switch (iir & 6) {
390 case 6:
391 inb(LSR(dev->base_addr));
392 break;
393
394 case 4:
395 inb(RBR(dev->base_addr));
396 break;
397
398 case 2:
399 /*
400 * check if transmitter active
401 */
402 if (hdlcdrv_ptt(&bc->hdrv))
403 ser12_tx(dev, bc);
404 else {
405 ser12_rx(dev, bc);
406 bc->modem.arb_divider--;
407 }
408 outb(0x00, THR(dev->base_addr));
409 break;
410
411 default:
412 inb(MSR(dev->base_addr));
413 break;
414 }
415 iir = inb(IIR(dev->base_addr));
416 } while (!(iir & 1));
417 if (bc->modem.arb_divider <= 0) {
418 bc->modem.arb_divider = SER12_ARB_DIVIDER(bc);
419 local_irq_enable();
420 hdlcdrv_arbitrate(dev, &bc->hdrv);
421 }
422 local_irq_enable();
423 hdlcdrv_transmitter(dev, &bc->hdrv);
424 hdlcdrv_receiver(dev, &bc->hdrv);
425 local_irq_disable();
426 return IRQ_HANDLED;
427 }
428
429 /* --------------------------------------------------------------------- */
430
431 enum uart { c_uart_unknown, c_uart_8250,
432 c_uart_16450, c_uart_16550, c_uart_16550A};
433 static const char *uart_str[] = {
434 "unknown", "8250", "16450", "16550", "16550A"
435 };
436
437 static enum uart ser12_check_uart(unsigned int iobase)
438 {
439 unsigned char b1,b2,b3;
440 enum uart u;
441 enum uart uart_tab[] =
442 { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A };
443
444 b1 = inb(MCR(iobase));
445 outb(b1 | 0x10, MCR(iobase)); /* loopback mode */
446 b2 = inb(MSR(iobase));
447 outb(0x1a, MCR(iobase));
448 b3 = inb(MSR(iobase)) & 0xf0;
449 outb(b1, MCR(iobase)); /* restore old values */
450 outb(b2, MSR(iobase));
451 if (b3 != 0x90)
452 return c_uart_unknown;
453 inb(RBR(iobase));
454 inb(RBR(iobase));
455 outb(0x01, FCR(iobase)); /* enable FIFOs */
456 u = uart_tab[(inb(IIR(iobase)) >> 6) & 3];
457 if (u == c_uart_16450) {
458 outb(0x5a, SCR(iobase));
459 b1 = inb(SCR(iobase));
460 outb(0xa5, SCR(iobase));
461 b2 = inb(SCR(iobase));
462 if ((b1 != 0x5a) || (b2 != 0xa5))
463 u = c_uart_8250;
464 }
465 return u;
466 }
467
468 /* --------------------------------------------------------------------- */
469
470 static int ser12_open(struct net_device *dev)
471 {
472 struct baycom_state *bc = netdev_priv(dev);
473 enum uart u;
474
475 if (!dev || !bc)
476 return -ENXIO;
477 if (!dev->base_addr || dev->base_addr > 0x1000-SER12_EXTENT ||
478 dev->irq < 2 || dev->irq > 15)
479 return -ENXIO;
480 if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser12"))
481 return -EACCES;
482 memset(&bc->modem, 0, sizeof(bc->modem));
483 bc->hdrv.par.bitrate = 1200;
484 if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown) {
485 release_region(dev->base_addr, SER12_EXTENT);
486 return -EIO;
487 }
488 outb(0, FCR(dev->base_addr)); /* disable FIFOs */
489 outb(0x0d, MCR(dev->base_addr));
490 outb(0, IER(dev->base_addr));
491 if (request_irq(dev->irq, ser12_interrupt, IRQF_DISABLED | IRQF_SHARED,
492 "baycom_ser12", dev)) {
493 release_region(dev->base_addr, SER12_EXTENT);
494 return -EBUSY;
495 }
496 /*
497 * enable transmitter empty interrupt
498 */
499 outb(2, IER(dev->base_addr));
500 /*
501 * set the SIO to 6 Bits/character and 19200 or 28800 baud, so that
502 * we get exactly (hopefully) 2 or 3 interrupts per radio symbol,
503 * depending on the usage of the software DCD routine
504 */
505 ser12_set_divisor(dev, bc->opt_dcd ? 6 : 4);
506 printk(KERN_INFO "%s: ser12 at iobase 0x%lx irq %u uart %s\n",
507 bc_drvname, dev->base_addr, dev->irq, uart_str[u]);
508 return 0;
509 }
510
511 /* --------------------------------------------------------------------- */
512
513 static int ser12_close(struct net_device *dev)
514 {
515 struct baycom_state *bc = netdev_priv(dev);
516
517 if (!dev || !bc)
518 return -EINVAL;
519 /*
520 * disable interrupts
521 */
522 outb(0, IER(dev->base_addr));
523 outb(1, MCR(dev->base_addr));
524 free_irq(dev->irq, dev);
525 release_region(dev->base_addr, SER12_EXTENT);
526 printk(KERN_INFO "%s: close ser12 at iobase 0x%lx irq %u\n",
527 bc_drvname, dev->base_addr, dev->irq);
528 return 0;
529 }
530
531 /* --------------------------------------------------------------------- */
532 /*
533 * ===================== hdlcdrv driver interface =========================
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 /* --------------------------------------------------------------------- */
542
543 static struct hdlcdrv_ops ser12_ops = {
544 .drvname = bc_drvname,
545 .drvinfo = bc_drvinfo,
546 .open = ser12_open,
547 .close = ser12_close,
548 .ioctl = baycom_ioctl,
549 };
550
551 /* --------------------------------------------------------------------- */
552
553 static int baycom_setmode(struct baycom_state *bc, const char *modestr)
554 {
555 if (strchr(modestr, '*'))
556 bc->opt_dcd = 0;
557 else if (strchr(modestr, '+'))
558 bc->opt_dcd = -1;
559 else if (strchr(modestr, '@'))
560 bc->opt_dcd = -2;
561 else
562 bc->opt_dcd = 1;
563 return 0;
564 }
565
566 /* --------------------------------------------------------------------- */
567
568 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr,
569 struct hdlcdrv_ioctl *hi, int cmd)
570 {
571 struct baycom_state *bc;
572 struct baycom_ioctl bi;
573
574 if (!dev)
575 return -EINVAL;
576
577 bc = netdev_priv(dev);
578 BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC);
579
580 if (cmd != SIOCDEVPRIVATE)
581 return -ENOIOCTLCMD;
582 switch (hi->cmd) {
583 default:
584 break;
585
586 case HDLCDRVCTL_GETMODE:
587 strcpy(hi->data.modename, "ser12");
588 if (bc->opt_dcd <= 0)
589 strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : (bc->opt_dcd == -2) ? "@" : "+");
590 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl)))
591 return -EFAULT;
592 return 0;
593
594 case HDLCDRVCTL_SETMODE:
595 if (netif_running(dev) || !capable(CAP_NET_ADMIN))
596 return -EACCES;
597 hi->data.modename[sizeof(hi->data.modename)-1] = '\0';
598 return baycom_setmode(bc, hi->data.modename);
599
600 case HDLCDRVCTL_MODELIST:
601 strcpy(hi->data.modename, "ser12");
602 if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl)))
603 return -EFAULT;
604 return 0;
605
606 case HDLCDRVCTL_MODEMPARMASK:
607 return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ;
608
609 }
610
611 if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi)))
612 return -EFAULT;
613 switch (bi.cmd) {
614 default:
615 return -ENOIOCTLCMD;
616
617 #ifdef BAYCOM_DEBUG
618 case BAYCOMCTL_GETDEBUG:
619 bi.data.dbg.debug1 = bc->hdrv.ptt_keyed;
620 bi.data.dbg.debug2 = bc->debug_vals.last_intcnt;
621 bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr;
622 break;
623 #endif /* BAYCOM_DEBUG */
624
625 }
626 if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi)))
627 return -EFAULT;
628 return 0;
629
630 }
631
632 /* --------------------------------------------------------------------- */
633
634 /*
635 * command line settable parameters
636 */
637 static char *mode[NR_PORTS] = { "ser12*", };
638 static int iobase[NR_PORTS] = { 0x3f8, };
639 static int irq[NR_PORTS] = { 4, };
640
641 module_param_array(mode, charp, NULL, 0);
642 MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD");
643 module_param_array(iobase, int, NULL, 0);
644 MODULE_PARM_DESC(iobase, "baycom io base address");
645 module_param_array(irq, int, NULL, 0);
646 MODULE_PARM_DESC(irq, "baycom irq number");
647
648 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
649 MODULE_DESCRIPTION("Baycom ser12 half duplex amateur radio modem driver");
650 MODULE_LICENSE("GPL");
651
652 /* --------------------------------------------------------------------- */
653
654 static int __init init_baycomserhdx(void)
655 {
656 int i, found = 0;
657 char set_hw = 1;
658
659 printk(bc_drvinfo);
660 /*
661 * register net devices
662 */
663 for (i = 0; i < NR_PORTS; i++) {
664 struct net_device *dev;
665 struct baycom_state *bc;
666 char ifname[IFNAMSIZ];
667
668 sprintf(ifname, "bcsh%d", i);
669
670 if (!mode[i])
671 set_hw = 0;
672 if (!set_hw)
673 iobase[i] = irq[i] = 0;
674
675 dev = hdlcdrv_register(&ser12_ops,
676 sizeof(struct baycom_state),
677 ifname, iobase[i], irq[i], 0);
678 if (IS_ERR(dev))
679 break;
680
681 bc = netdev_priv(dev);
682 if (set_hw && baycom_setmode(bc, mode[i]))
683 set_hw = 0;
684 found++;
685 baycom_device[i] = dev;
686 }
687
688 if (!found)
689 return -ENXIO;
690 return 0;
691 }
692
693 static void __exit cleanup_baycomserhdx(void)
694 {
695 int i;
696
697 for(i = 0; i < NR_PORTS; i++) {
698 struct net_device *dev = baycom_device[i];
699
700 if (dev)
701 hdlcdrv_unregister(dev);
702 }
703 }
704
705 module_init(init_baycomserhdx);
706 module_exit(cleanup_baycomserhdx);
707
708 /* --------------------------------------------------------------------- */
709
710 #ifndef MODULE
711
712 /*
713 * format: baycom_ser_hdx=io,irq,mode
714 * mode: ser12 hardware DCD
715 * ser12* software DCD
716 * ser12@ hardware/software DCD, i.e. no explicit DCD signal but hardware
717 * mutes audio input to the modem
718 * ser12+ hardware DCD, inverted signal at DCD pin
719 */
720
721 static int __init baycom_ser_hdx_setup(char *str)
722 {
723 static unsigned nr_dev;
724 int ints[3];
725
726 if (nr_dev >= NR_PORTS)
727 return 0;
728 str = get_options(str, 3, ints);
729 if (ints[0] < 2)
730 return 0;
731 mode[nr_dev] = str;
732 iobase[nr_dev] = ints[1];
733 irq[nr_dev] = ints[2];
734 nr_dev++;
735 return 1;
736 }
737
738 __setup("baycom_ser_hdx=", baycom_ser_hdx_setup);
739
740 #endif /* MODULE */
741 /* --------------------------------------------------------------------- */
Linux with added FPC-III support