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Linux 2.6.20.7
[linux/fpc-iii.git] / drivers / net / hamradio / baycom_epp.c
blob153b6dc80af4c38bebcca28a4cf8afc6a4209124
1 /*****************************************************************************/
2
3 /*
4 * baycom_epp.c -- baycom epp radio modem driver.
5 *
6 * Copyright (C) 1998-2000
7 * Thomas Sailer (sailer@ife.ee.ethz.ch)
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Please note that the GPL allows you to use the driver, NOT the radio.
24 * In order to use the radio, you need a license from the communications
25 * authority of your country.
26 *
27 *
28 * History:
29 * 0.1 xx.xx.1998 Initial version by Matthias Welwarsky (dg2fef)
30 * 0.2 21.04.1998 Massive rework by Thomas Sailer
31 * Integrated FPGA EPP modem configuration routines
32 * 0.3 11.05.1998 Took FPGA config out and moved it into a separate program
33 * 0.4 26.07.1999 Adapted to new lowlevel parport driver interface
34 * 0.5 03.08.1999 adapt to Linus' new __setup/__initcall
35 * removed some pre-2.2 kernel compatibility cruft
36 * 0.6 10.08.1999 Check if parport can do SPP and is safe to access during interrupt contexts
37 * 0.7 12.02.2000 adapted to softnet driver interface
38 *
39 */
40
41 /*****************************************************************************/
42
43 #include <linux/crc-ccitt.h>
44 #include <linux/module.h>
45 #include <linux/kernel.h>
46 #include <linux/init.h>
47 #include <linux/string.h>
48 #include <linux/workqueue.h>
49 #include <linux/fs.h>
50 #include <linux/parport.h>
51 #include <linux/if_arp.h>
52 #include <linux/hdlcdrv.h>
53 #include <linux/baycom.h>
54 #include <linux/jiffies.h>
55 #include <net/ax25.h>
56 #include <asm/uaccess.h>
57
58 /* --------------------------------------------------------------------- */
59
60 #define BAYCOM_DEBUG
61 #define BAYCOM_MAGIC 19730510
62
63 /* --------------------------------------------------------------------- */
64
65 static const char paranoia_str[] = KERN_ERR
66 "baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n";
67
68 static const char bc_drvname[] = "baycom_epp";
69 static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n"
70 KERN_INFO "baycom_epp: version 0.7 compiled " __TIME__ " " __DATE__ "\n";
71
72 /* --------------------------------------------------------------------- */
73
74 #define NR_PORTS 4
75
76 static struct net_device *baycom_device[NR_PORTS];
77
78 /* --------------------------------------------------------------------- */
79
80 /* EPP status register */
81 #define EPP_DCDBIT 0x80
82 #define EPP_PTTBIT 0x08
83 #define EPP_NREF 0x01
84 #define EPP_NRAEF 0x02
85 #define EPP_NRHF 0x04
86 #define EPP_NTHF 0x20
87 #define EPP_NTAEF 0x10
88 #define EPP_NTEF EPP_PTTBIT
89
90 /* EPP control register */
91 #define EPP_TX_FIFO_ENABLE 0x10
92 #define EPP_RX_FIFO_ENABLE 0x08
93 #define EPP_MODEM_ENABLE 0x20
94 #define EPP_LEDS 0xC0
95 #define EPP_IRQ_ENABLE 0x10
96
97 /* LPT registers */
98 #define LPTREG_ECONTROL 0x402
99 #define LPTREG_CONFIGB 0x401
100 #define LPTREG_CONFIGA 0x400
101 #define LPTREG_EPPDATA 0x004
102 #define LPTREG_EPPADDR 0x003
103 #define LPTREG_CONTROL 0x002
104 #define LPTREG_STATUS 0x001
105 #define LPTREG_DATA 0x000
106
107 /* LPT control register */
108 #define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */
109 #define LPTCTRL_WRITE 0x01
110 #define LPTCTRL_ADDRSTB 0x08
111 #define LPTCTRL_DATASTB 0x02
112 #define LPTCTRL_INTEN 0x10
113
114 /* LPT status register */
115 #define LPTSTAT_SHIFT_NINTR 6
116 #define LPTSTAT_WAIT 0x80
117 #define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR)
118 #define LPTSTAT_PE 0x20
119 #define LPTSTAT_DONE 0x10
120 #define LPTSTAT_NERROR 0x08
121 #define LPTSTAT_EPPTIMEOUT 0x01
122
123 /* LPT data register */
124 #define LPTDATA_SHIFT_TDI 0
125 #define LPTDATA_SHIFT_TMS 2
126 #define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI)
127 #define LPTDATA_TCK 0x02
128 #define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS)
129 #define LPTDATA_INITBIAS 0x80
130
131
132 /* EPP modem config/status bits */
133 #define EPP_DCDBIT 0x80
134 #define EPP_PTTBIT 0x08
135 #define EPP_RXEBIT 0x01
136 #define EPP_RXAEBIT 0x02
137 #define EPP_RXHFULL 0x04
138
139 #define EPP_NTHF 0x20
140 #define EPP_NTAEF 0x10
141 #define EPP_NTEF EPP_PTTBIT
142
143 #define EPP_TX_FIFO_ENABLE 0x10
144 #define EPP_RX_FIFO_ENABLE 0x08
145 #define EPP_MODEM_ENABLE 0x20
146 #define EPP_LEDS 0xC0
147 #define EPP_IRQ_ENABLE 0x10
148
149 /* Xilinx 4k JTAG instructions */
150 #define XC4K_IRLENGTH 3
151 #define XC4K_EXTEST 0
152 #define XC4K_PRELOAD 1
153 #define XC4K_CONFIGURE 5
154 #define XC4K_BYPASS 7
155
156 #define EPP_CONVENTIONAL 0
157 #define EPP_FPGA 1
158 #define EPP_FPGAEXTSTATUS 2
159
160 #define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8)
161
162 /* ---------------------------------------------------------------------- */
163 /*
164 * Information that need to be kept for each board.
165 */
166
167 struct baycom_state {
168 int magic;
169
170 struct pardevice *pdev;
171 struct net_device *dev;
172 unsigned int work_running;
173 struct delayed_work run_work;
174 unsigned int modem;
175 unsigned int bitrate;
176 unsigned char stat;
177
178 struct {
179 unsigned int intclk;
180 unsigned int fclk;
181 unsigned int bps;
182 unsigned int extmodem;
183 unsigned int loopback;
184 } cfg;
185
186 struct hdlcdrv_channel_params ch_params;
187
188 struct {
189 unsigned int bitbuf, bitstream, numbits, state;
190 unsigned char *bufptr;
191 int bufcnt;
192 unsigned char buf[TXBUFFER_SIZE];
193 } hdlcrx;
194
195 struct {
196 int calibrate;
197 int slotcnt;
198 int flags;
199 enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state;
200 unsigned char *bufptr;
201 int bufcnt;
202 unsigned char buf[TXBUFFER_SIZE];
203 } hdlctx;
204
205 struct net_device_stats stats;
206 unsigned int ptt_keyed;
207 struct sk_buff *skb; /* next transmit packet */
208
209 #ifdef BAYCOM_DEBUG
210 struct debug_vals {
211 unsigned long last_jiffies;
212 unsigned cur_intcnt;
213 unsigned last_intcnt;
214 int cur_pllcorr;
215 int last_pllcorr;
216 unsigned int mod_cycles;
217 unsigned int demod_cycles;
218 } debug_vals;
219 #endif /* BAYCOM_DEBUG */
220 };
221
222 /* --------------------------------------------------------------------- */
223
224 #define KISS_VERBOSE
225
226 /* --------------------------------------------------------------------- */
227
228 #define PARAM_TXDELAY 1
229 #define PARAM_PERSIST 2
230 #define PARAM_SLOTTIME 3
231 #define PARAM_TXTAIL 4
232 #define PARAM_FULLDUP 5
233 #define PARAM_HARDWARE 6
234 #define PARAM_RETURN 255
235
236 /* --------------------------------------------------------------------- */
237 /*
238 * the CRC routines are stolen from WAMPES
239 * by Dieter Deyke
240 */
241
242
243 /*---------------------------------------------------------------------------*/
244
245 #if 0
246 static inline void append_crc_ccitt(unsigned char *buffer, int len)
247 {
248 unsigned int crc = 0xffff;
249
250 for (;len>0;len--)
251 crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff];
252 crc ^= 0xffff;
253 *buffer++ = crc;
254 *buffer++ = crc >> 8;
255 }
256 #endif
257
258 /*---------------------------------------------------------------------------*/
259
260 static inline int check_crc_ccitt(const unsigned char *buf, int cnt)
261 {
262 return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8;
263 }
264
265 /*---------------------------------------------------------------------------*/
266
267 static inline int calc_crc_ccitt(const unsigned char *buf, int cnt)
268 {
269 return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff;
270 }
271
272 /* ---------------------------------------------------------------------- */
273
274 #define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800)
275
276 /* --------------------------------------------------------------------- */
277
278 static inline void baycom_int_freq(struct baycom_state *bc)
279 {
280 #ifdef BAYCOM_DEBUG
281 unsigned long cur_jiffies = jiffies;
282 /*
283 * measure the interrupt frequency
284 */
285 bc->debug_vals.cur_intcnt++;
286 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
287 bc->debug_vals.last_jiffies = cur_jiffies;
288 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
289 bc->debug_vals.cur_intcnt = 0;
290 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
291 bc->debug_vals.cur_pllcorr = 0;
292 }
293 #endif /* BAYCOM_DEBUG */
294 }
295
296 /* ---------------------------------------------------------------------- */
297 /*
298 * eppconfig_path should be setable via /proc/sys.
299 */
300
301 static char eppconfig_path[256] = "/usr/sbin/eppfpga";
302
303 static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL };
304
305 /* eppconfig: called during ifconfig up to configure the modem */
306 static int eppconfig(struct baycom_state *bc)
307 {
308 char modearg[256];
309 char portarg[16];
310 char *argv[] = { eppconfig_path, "-s", "-p", portarg, "-m", modearg,
311 NULL };
312
313 /* set up arguments */
314 sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat",
315 bc->cfg.intclk ? "int" : "ext",
316 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
317 (bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps),
318 bc->cfg.loopback ? ",loopback" : "");
319 sprintf(portarg, "%ld", bc->pdev->port->base);
320 printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg);
321
322 return call_usermodehelper(eppconfig_path, argv, envp, 1);
323 }
324
325 /* ---------------------------------------------------------------------- */
326
327 static void epp_interrupt(int irq, void *dev_id)
328 {
329 }
330
331 /* ---------------------------------------------------------------------- */
332
333 static inline void do_kiss_params(struct baycom_state *bc,
334 unsigned char *data, unsigned long len)
335 {
336
337 #ifdef KISS_VERBOSE
338 #define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b)
339 #else /* KISS_VERBOSE */
340 #define PKP(a,b)
341 #endif /* KISS_VERBOSE */
342
343 if (len < 2)
344 return;
345 switch(data[0]) {
346 case PARAM_TXDELAY:
347 bc->ch_params.tx_delay = data[1];
348 PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay);
349 break;
350 case PARAM_PERSIST:
351 bc->ch_params.ppersist = data[1];
352 PKP("p persistence = %u", bc->ch_params.ppersist);
353 break;
354 case PARAM_SLOTTIME:
355 bc->ch_params.slottime = data[1];
356 PKP("slot time = %ums", bc->ch_params.slottime);
357 break;
358 case PARAM_TXTAIL:
359 bc->ch_params.tx_tail = data[1];
360 PKP("TX tail = %ums", bc->ch_params.tx_tail);
361 break;
362 case PARAM_FULLDUP:
363 bc->ch_params.fulldup = !!data[1];
364 PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half");
365 break;
366 default:
367 break;
368 }
369 #undef PKP
370 }
371
372 /* --------------------------------------------------------------------- */
373
374 static void encode_hdlc(struct baycom_state *bc)
375 {
376 struct sk_buff *skb;
377 unsigned char *wp, *bp;
378 int pkt_len;
379 unsigned bitstream, notbitstream, bitbuf, numbit, crc;
380 unsigned char crcarr[2];
381 int j;
382
383 if (bc->hdlctx.bufcnt > 0)
384 return;
385 skb = bc->skb;
386 if (!skb)
387 return;
388 bc->skb = NULL;
389 pkt_len = skb->len-1; /* strip KISS byte */
390 wp = bc->hdlctx.buf;
391 bp = skb->data+1;
392 crc = calc_crc_ccitt(bp, pkt_len);
393 crcarr[0] = crc;
394 crcarr[1] = crc >> 8;
395 *wp++ = 0x7e;
396 bitstream = bitbuf = numbit = 0;
397 while (pkt_len > -2) {
398 bitstream >>= 8;
399 bitstream |= ((unsigned int)*bp) << 8;
400 bitbuf |= ((unsigned int)*bp) << numbit;
401 notbitstream = ~bitstream;
402 bp++;
403 pkt_len--;
404 if (!pkt_len)
405 bp = crcarr;
406 for (j = 0; j < 8; j++)
407 if (unlikely(!(notbitstream & (0x1f0 << j)))) {
408 bitstream &= ~(0x100 << j);
409 bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) |
410 ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1);
411 numbit++;
412 notbitstream = ~bitstream;
413 }
414 numbit += 8;
415 while (numbit >= 8) {
416 *wp++ = bitbuf;
417 bitbuf >>= 8;
418 numbit -= 8;
419 }
420 }
421 bitbuf |= 0x7e7e << numbit;
422 numbit += 16;
423 while (numbit >= 8) {
424 *wp++ = bitbuf;
425 bitbuf >>= 8;
426 numbit -= 8;
427 }
428 bc->hdlctx.bufptr = bc->hdlctx.buf;
429 bc->hdlctx.bufcnt = wp - bc->hdlctx.buf;
430 dev_kfree_skb(skb);
431 bc->stats.tx_packets++;
432 }
433
434 /* ---------------------------------------------------------------------- */
435
436 static unsigned short random_seed;
437
438 static inline unsigned short random_num(void)
439 {
440 random_seed = 28629 * random_seed + 157;
441 return random_seed;
442 }
443
444 /* ---------------------------------------------------------------------- */
445
446 static int transmit(struct baycom_state *bc, int cnt, unsigned char stat)
447 {
448 struct parport *pp = bc->pdev->port;
449 unsigned char tmp[128];
450 int i, j;
451
452 if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT))
453 bc->hdlctx.state = tx_idle;
454 if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) {
455 if (bc->hdlctx.bufcnt <= 0)
456 encode_hdlc(bc);
457 if (bc->hdlctx.bufcnt <= 0)
458 return 0;
459 if (!bc->ch_params.fulldup) {
460 if (!(stat & EPP_DCDBIT)) {
461 bc->hdlctx.slotcnt = bc->ch_params.slottime;
462 return 0;
463 }
464 if ((--bc->hdlctx.slotcnt) > 0)
465 return 0;
466 bc->hdlctx.slotcnt = bc->ch_params.slottime;
467 if ((random_num() % 256) > bc->ch_params.ppersist)
468 return 0;
469 }
470 }
471 if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) {
472 bc->hdlctx.state = tx_keyup;
473 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay);
474 bc->ptt_keyed++;
475 }
476 while (cnt > 0) {
477 switch (bc->hdlctx.state) {
478 case tx_keyup:
479 i = min_t(int, cnt, bc->hdlctx.flags);
480 cnt -= i;
481 bc->hdlctx.flags -= i;
482 if (bc->hdlctx.flags <= 0)
483 bc->hdlctx.state = tx_data;
484 memset(tmp, 0x7e, sizeof(tmp));
485 while (i > 0) {
486 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
487 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
488 return -1;
489 i -= j;
490 }
491 break;
492
493 case tx_data:
494 if (bc->hdlctx.bufcnt <= 0) {
495 encode_hdlc(bc);
496 if (bc->hdlctx.bufcnt <= 0) {
497 bc->hdlctx.state = tx_tail;
498 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail);
499 break;
500 }
501 }
502 i = min_t(int, cnt, bc->hdlctx.bufcnt);
503 bc->hdlctx.bufcnt -= i;
504 cnt -= i;
505 if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0))
506 return -1;
507 bc->hdlctx.bufptr += i;
508 break;
509
510 case tx_tail:
511 encode_hdlc(bc);
512 if (bc->hdlctx.bufcnt > 0) {
513 bc->hdlctx.state = tx_data;
514 break;
515 }
516 i = min_t(int, cnt, bc->hdlctx.flags);
517 if (i) {
518 cnt -= i;
519 bc->hdlctx.flags -= i;
520 memset(tmp, 0x7e, sizeof(tmp));
521 while (i > 0) {
522 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
523 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
524 return -1;
525 i -= j;
526 }
527 break;
528 }
529
530 default: /* fall through */
531 if (bc->hdlctx.calibrate <= 0)
532 return 0;
533 i = min_t(int, cnt, bc->hdlctx.calibrate);
534 cnt -= i;
535 bc->hdlctx.calibrate -= i;
536 memset(tmp, 0, sizeof(tmp));
537 while (i > 0) {
538 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
539 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
540 return -1;
541 i -= j;
542 }
543 break;
544 }
545 }
546 return 0;
547 }
548
549 /* ---------------------------------------------------------------------- */
550
551 static void do_rxpacket(struct net_device *dev)
552 {
553 struct baycom_state *bc = netdev_priv(dev);
554 struct sk_buff *skb;
555 unsigned char *cp;
556 unsigned pktlen;
557
558 if (bc->hdlcrx.bufcnt < 4)
559 return;
560 if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt))
561 return;
562 pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */
563 if (!(skb = dev_alloc_skb(pktlen))) {
564 printk("%s: memory squeeze, dropping packet\n", dev->name);
565 bc->stats.rx_dropped++;
566 return;
567 }
568 cp = skb_put(skb, pktlen);
569 *cp++ = 0; /* KISS kludge */
570 memcpy(cp, bc->hdlcrx.buf, pktlen - 1);
571 skb->protocol = ax25_type_trans(skb, dev);
572 netif_rx(skb);
573 dev->last_rx = jiffies;
574 bc->stats.rx_packets++;
575 }
576
577 static int receive(struct net_device *dev, int cnt)
578 {
579 struct baycom_state *bc = netdev_priv(dev);
580 struct parport *pp = bc->pdev->port;
581 unsigned int bitbuf, notbitstream, bitstream, numbits, state;
582 unsigned char tmp[128];
583 unsigned char *cp;
584 int cnt2, ret = 0;
585 int j;
586
587 numbits = bc->hdlcrx.numbits;
588 state = bc->hdlcrx.state;
589 bitstream = bc->hdlcrx.bitstream;
590 bitbuf = bc->hdlcrx.bitbuf;
591 while (cnt > 0) {
592 cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt;
593 cnt -= cnt2;
594 if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) {
595 ret = -1;
596 break;
597 }
598 cp = tmp;
599 for (; cnt2 > 0; cnt2--, cp++) {
600 bitstream >>= 8;
601 bitstream |= (*cp) << 8;
602 bitbuf >>= 8;
603 bitbuf |= (*cp) << 8;
604 numbits += 8;
605 notbitstream = ~bitstream;
606 for (j = 0; j < 8; j++) {
607
608 /* flag or abort */
609 if (unlikely(!(notbitstream & (0x0fc << j)))) {
610
611 /* abort received */
612 if (!(notbitstream & (0x1fc << j)))
613 state = 0;
614
615 /* not flag received */
616 else if (!(bitstream & (0x1fe << j)) != (0x0fc << j)) {
617 if (state)
618 do_rxpacket(dev);
619 bc->hdlcrx.bufcnt = 0;
620 bc->hdlcrx.bufptr = bc->hdlcrx.buf;
621 state = 1;
622 numbits = 7-j;
623 }
624 }
625
626 /* stuffed bit */
627 else if (unlikely((bitstream & (0x1f8 << j)) == (0xf8 << j))) {
628 numbits--;
629 bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1);
630 }
631 }
632 while (state && numbits >= 8) {
633 if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) {
634 state = 0;
635 } else {
636 *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits);
637 bc->hdlcrx.bufcnt++;
638 numbits -= 8;
639 }
640 }
641 }
642 }
643 bc->hdlcrx.numbits = numbits;
644 bc->hdlcrx.state = state;
645 bc->hdlcrx.bitstream = bitstream;
646 bc->hdlcrx.bitbuf = bitbuf;
647 return ret;
648 }
649
650 /* --------------------------------------------------------------------- */
651
652 #ifdef __i386__
653 #include <asm/msr.h>
654 #define GETTICK(x) \
655 ({ \
656 if (cpu_has_tsc) \
657 rdtscl(x); \
658 })
659 #else /* __i386__ */
660 #define GETTICK(x)
661 #endif /* __i386__ */
662
663 static void epp_bh(struct work_struct *work)
664 {
665 struct net_device *dev;
666 struct baycom_state *bc;
667 struct parport *pp;
668 unsigned char stat;
669 unsigned char tmp[2];
670 unsigned int time1 = 0, time2 = 0, time3 = 0;
671 int cnt, cnt2;
672
673 bc = container_of(work, struct baycom_state, run_work.work);
674 dev = bc->dev;
675 if (!bc->work_running)
676 return;
677 baycom_int_freq(bc);
678 pp = bc->pdev->port;
679 /* update status */
680 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
681 goto epptimeout;
682 bc->stat = stat;
683 bc->debug_vals.last_pllcorr = stat;
684 GETTICK(time1);
685 if (bc->modem == EPP_FPGAEXTSTATUS) {
686 /* get input count */
687 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1;
688 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
689 goto epptimeout;
690 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
691 goto epptimeout;
692 cnt = tmp[0] | (tmp[1] << 8);
693 cnt &= 0x7fff;
694 /* get output count */
695 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2;
696 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
697 goto epptimeout;
698 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
699 goto epptimeout;
700 cnt2 = tmp[0] | (tmp[1] << 8);
701 cnt2 = 16384 - (cnt2 & 0x7fff);
702 /* return to normal */
703 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
704 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
705 goto epptimeout;
706 if (transmit(bc, cnt2, stat))
707 goto epptimeout;
708 GETTICK(time2);
709 if (receive(dev, cnt))
710 goto epptimeout;
711 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
712 goto epptimeout;
713 bc->stat = stat;
714 } else {
715 /* try to tx */
716 switch (stat & (EPP_NTAEF|EPP_NTHF)) {
717 case EPP_NTHF:
718 cnt = 2048 - 256;
719 break;
720
721 case EPP_NTAEF:
722 cnt = 2048 - 1793;
723 break;
724
725 case 0:
726 cnt = 0;
727 break;
728
729 default:
730 cnt = 2048 - 1025;
731 break;
732 }
733 if (transmit(bc, cnt, stat))
734 goto epptimeout;
735 GETTICK(time2);
736 /* do receiver */
737 while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) {
738 switch (stat & (EPP_NRAEF|EPP_NRHF)) {
739 case EPP_NRAEF:
740 cnt = 1025;
741 break;
742
743 case 0:
744 cnt = 1793;
745 break;
746
747 default:
748 cnt = 256;
749 break;
750 }
751 if (receive(dev, cnt))
752 goto epptimeout;
753 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
754 goto epptimeout;
755 }
756 cnt = 0;
757 if (bc->bitrate < 50000)
758 cnt = 256;
759 else if (bc->bitrate < 100000)
760 cnt = 128;
761 while (cnt > 0 && stat & EPP_NREF) {
762 if (receive(dev, 1))
763 goto epptimeout;
764 cnt--;
765 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
766 goto epptimeout;
767 }
768 }
769 GETTICK(time3);
770 #ifdef BAYCOM_DEBUG
771 bc->debug_vals.mod_cycles = time2 - time1;
772 bc->debug_vals.demod_cycles = time3 - time2;
773 #endif /* BAYCOM_DEBUG */
774 schedule_delayed_work(&bc->run_work, 1);
775 if (!bc->skb)
776 netif_wake_queue(dev);
777 return;
778 epptimeout:
779 printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname);
780 }
781
782 /* ---------------------------------------------------------------------- */
783 /*
784 * ===================== network driver interface =========================
785 */
786
787 static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
788 {
789 struct baycom_state *bc = netdev_priv(dev);
790
791 if (skb->data[0] != 0) {
792 do_kiss_params(bc, skb->data, skb->len);
793 dev_kfree_skb(skb);
794 return 0;
795 }
796 if (bc->skb)
797 return -1;
798 /* strip KISS byte */
799 if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) {
800 dev_kfree_skb(skb);
801 return 0;
802 }
803 netif_stop_queue(dev);
804 bc->skb = skb;
805 return 0;
806 }
807
808 /* --------------------------------------------------------------------- */
809
810 static int baycom_set_mac_address(struct net_device *dev, void *addr)
811 {
812 struct sockaddr *sa = (struct sockaddr *)addr;
813
814 /* addr is an AX.25 shifted ASCII mac address */
815 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
816 return 0;
817 }
818
819 /* --------------------------------------------------------------------- */
820
821 static struct net_device_stats *baycom_get_stats(struct net_device *dev)
822 {
823 struct baycom_state *bc = netdev_priv(dev);
824
825 /*
826 * Get the current statistics. This may be called with the
827 * card open or closed.
828 */
829 return &bc->stats;
830 }
831
832 /* --------------------------------------------------------------------- */
833
834 static void epp_wakeup(void *handle)
835 {
836 struct net_device *dev = (struct net_device *)handle;
837 struct baycom_state *bc = netdev_priv(dev);
838
839 printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name);
840 if (!parport_claim(bc->pdev))
841 printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name);
842 }
843
844 /* --------------------------------------------------------------------- */
845
846 /*
847 * Open/initialize the board. This is called (in the current kernel)
848 * sometime after booting when the 'ifconfig' program is run.
849 *
850 * This routine should set everything up anew at each open, even
851 * registers that "should" only need to be set once at boot, so that
852 * there is non-reboot way to recover if something goes wrong.
853 */
854
855 static int epp_open(struct net_device *dev)
856 {
857 struct baycom_state *bc = netdev_priv(dev);
858 struct parport *pp = parport_find_base(dev->base_addr);
859 unsigned int i, j;
860 unsigned char tmp[128];
861 unsigned char stat;
862 unsigned long tstart;
863
864 if (!pp) {
865 printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr);
866 return -ENXIO;
867 }
868 #if 0
869 if (pp->irq < 0) {
870 printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base);
871 parport_put_port(pp);
872 return -ENXIO;
873 }
874 #endif
875 if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) {
876 printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n",
877 bc_drvname, pp->base);
878 parport_put_port(pp);
879 return -EIO;
880 }
881 memset(&bc->modem, 0, sizeof(bc->modem));
882 bc->pdev = parport_register_device(pp, dev->name, NULL, epp_wakeup,
883 epp_interrupt, PARPORT_DEV_EXCL, dev);
884 parport_put_port(pp);
885 if (!bc->pdev) {
886 printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base);
887 return -ENXIO;
888 }
889 if (parport_claim(bc->pdev)) {
890 printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base);
891 parport_unregister_device(bc->pdev);
892 return -EBUSY;
893 }
894 dev->irq = /*pp->irq*/ 0;
895 INIT_DELAYED_WORK(&bc->run_work, epp_bh);
896 bc->work_running = 1;
897 bc->modem = EPP_CONVENTIONAL;
898 if (eppconfig(bc))
899 printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname);
900 else
901 bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS;
902 parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */
903 /* reset the modem */
904 tmp[0] = 0;
905 tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
906 if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2)
907 goto epptimeout;
908 /* autoprobe baud rate */
909 tstart = jiffies;
910 i = 0;
911 while (time_before(jiffies, tstart + HZ/3)) {
912 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
913 goto epptimeout;
914 if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) {
915 schedule();
916 continue;
917 }
918 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
919 goto epptimeout;
920 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
921 goto epptimeout;
922 i += 256;
923 }
924 for (j = 0; j < 256; j++) {
925 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
926 goto epptimeout;
927 if (!(stat & EPP_NREF))
928 break;
929 if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1)
930 goto epptimeout;
931 i++;
932 }
933 tstart = jiffies - tstart;
934 bc->bitrate = i * (8 * HZ) / tstart;
935 j = 1;
936 i = bc->bitrate >> 3;
937 while (j < 7 && i > 150) {
938 j++;
939 i >>= 1;
940 }
941 printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n",
942 bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2));
943 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/;
944 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
945 goto epptimeout;
946 /*
947 * initialise hdlc variables
948 */
949 bc->hdlcrx.state = 0;
950 bc->hdlcrx.numbits = 0;
951 bc->hdlctx.state = tx_idle;
952 bc->hdlctx.bufcnt = 0;
953 bc->hdlctx.slotcnt = bc->ch_params.slottime;
954 bc->hdlctx.calibrate = 0;
955 /* start the bottom half stuff */
956 schedule_delayed_work(&bc->run_work, 1);
957 netif_start_queue(dev);
958 return 0;
959
960 epptimeout:
961 printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname);
962 parport_write_control(pp, 0); /* reset the adapter */
963 parport_release(bc->pdev);
964 parport_unregister_device(bc->pdev);
965 return -EIO;
966 }
967
968 /* --------------------------------------------------------------------- */
969
970 static int epp_close(struct net_device *dev)
971 {
972 struct baycom_state *bc = netdev_priv(dev);
973 struct parport *pp = bc->pdev->port;
974 unsigned char tmp[1];
975
976 bc->work_running = 0;
977 flush_scheduled_work();
978 bc->stat = EPP_DCDBIT;
979 tmp[0] = 0;
980 pp->ops->epp_write_addr(pp, tmp, 1, 0);
981 parport_write_control(pp, 0); /* reset the adapter */
982 parport_release(bc->pdev);
983 parport_unregister_device(bc->pdev);
984 if (bc->skb)
985 dev_kfree_skb(bc->skb);
986 bc->skb = NULL;
987 printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n",
988 bc_drvname, dev->base_addr, dev->irq);
989 return 0;
990 }
991
992 /* --------------------------------------------------------------------- */
993
994 static int baycom_setmode(struct baycom_state *bc, const char *modestr)
995 {
996 const char *cp;
997
998 if (strstr(modestr,"intclk"))
999 bc->cfg.intclk = 1;
1000 if (strstr(modestr,"extclk"))
1001 bc->cfg.intclk = 0;
1002 if (strstr(modestr,"intmodem"))
1003 bc->cfg.extmodem = 0;
1004 if (strstr(modestr,"extmodem"))
1005 bc->cfg.extmodem = 1;
1006 if (strstr(modestr,"noloopback"))
1007 bc->cfg.loopback = 0;
1008 if (strstr(modestr,"loopback"))
1009 bc->cfg.loopback = 1;
1010 if ((cp = strstr(modestr,"fclk="))) {
1011 bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0);
1012 if (bc->cfg.fclk < 1000000)
1013 bc->cfg.fclk = 1000000;
1014 if (bc->cfg.fclk > 25000000)
1015 bc->cfg.fclk = 25000000;
1016 }
1017 if ((cp = strstr(modestr,"bps="))) {
1018 bc->cfg.bps = simple_strtoul(cp+4, NULL, 0);
1019 if (bc->cfg.bps < 1000)
1020 bc->cfg.bps = 1000;
1021 if (bc->cfg.bps > 1500000)
1022 bc->cfg.bps = 1500000;
1023 }
1024 return 0;
1025 }
1026
1027 /* --------------------------------------------------------------------- */
1028
1029 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1030 {
1031 struct baycom_state *bc = netdev_priv(dev);
1032 struct hdlcdrv_ioctl hi;
1033
1034 if (cmd != SIOCDEVPRIVATE)
1035 return -ENOIOCTLCMD;
1036
1037 if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi)))
1038 return -EFAULT;
1039 switch (hi.cmd) {
1040 default:
1041 return -ENOIOCTLCMD;
1042
1043 case HDLCDRVCTL_GETCHANNELPAR:
1044 hi.data.cp.tx_delay = bc->ch_params.tx_delay;
1045 hi.data.cp.tx_tail = bc->ch_params.tx_tail;
1046 hi.data.cp.slottime = bc->ch_params.slottime;
1047 hi.data.cp.ppersist = bc->ch_params.ppersist;
1048 hi.data.cp.fulldup = bc->ch_params.fulldup;
1049 break;
1050
1051 case HDLCDRVCTL_SETCHANNELPAR:
1052 if (!capable(CAP_NET_ADMIN))
1053 return -EACCES;
1054 bc->ch_params.tx_delay = hi.data.cp.tx_delay;
1055 bc->ch_params.tx_tail = hi.data.cp.tx_tail;
1056 bc->ch_params.slottime = hi.data.cp.slottime;
1057 bc->ch_params.ppersist = hi.data.cp.ppersist;
1058 bc->ch_params.fulldup = hi.data.cp.fulldup;
1059 bc->hdlctx.slotcnt = 1;
1060 return 0;
1061
1062 case HDLCDRVCTL_GETMODEMPAR:
1063 hi.data.mp.iobase = dev->base_addr;
1064 hi.data.mp.irq = dev->irq;
1065 hi.data.mp.dma = dev->dma;
1066 hi.data.mp.dma2 = 0;
1067 hi.data.mp.seriobase = 0;
1068 hi.data.mp.pariobase = 0;
1069 hi.data.mp.midiiobase = 0;
1070 break;
1071
1072 case HDLCDRVCTL_SETMODEMPAR:
1073 if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev))
1074 return -EACCES;
1075 dev->base_addr = hi.data.mp.iobase;
1076 dev->irq = /*hi.data.mp.irq*/0;
1077 dev->dma = /*hi.data.mp.dma*/0;
1078 return 0;
1079
1080 case HDLCDRVCTL_GETSTAT:
1081 hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT);
1082 hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT);
1083 hi.data.cs.ptt_keyed = bc->ptt_keyed;
1084 hi.data.cs.tx_packets = bc->stats.tx_packets;
1085 hi.data.cs.tx_errors = bc->stats.tx_errors;
1086 hi.data.cs.rx_packets = bc->stats.rx_packets;
1087 hi.data.cs.rx_errors = bc->stats.rx_errors;
1088 break;
1089
1090 case HDLCDRVCTL_OLDGETSTAT:
1091 hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT);
1092 hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT);
1093 hi.data.ocs.ptt_keyed = bc->ptt_keyed;
1094 break;
1095
1096 case HDLCDRVCTL_CALIBRATE:
1097 if (!capable(CAP_SYS_RAWIO))
1098 return -EACCES;
1099 bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8;
1100 return 0;
1101
1102 case HDLCDRVCTL_DRIVERNAME:
1103 strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername));
1104 break;
1105
1106 case HDLCDRVCTL_GETMODE:
1107 sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s",
1108 bc->cfg.intclk ? "int" : "ext",
1109 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
1110 bc->cfg.loopback ? ",loopback" : "");
1111 break;
1112
1113 case HDLCDRVCTL_SETMODE:
1114 if (!capable(CAP_NET_ADMIN) || netif_running(dev))
1115 return -EACCES;
1116 hi.data.modename[sizeof(hi.data.modename)-1] = '\0';
1117 return baycom_setmode(bc, hi.data.modename);
1118
1119 case HDLCDRVCTL_MODELIST:
1120 strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x",
1121 sizeof(hi.data.modename));
1122 break;
1123
1124 case HDLCDRVCTL_MODEMPARMASK:
1125 return HDLCDRV_PARMASK_IOBASE;
1126
1127 }
1128 if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi)))
1129 return -EFAULT;
1130 return 0;
1131 }
1132
1133 /* --------------------------------------------------------------------- */
1134
1135 /*
1136 * Check for a network adaptor of this type, and return '0' if one exists.
1137 * If dev->base_addr == 0, probe all likely locations.
1138 * If dev->base_addr == 1, always return failure.
1139 * If dev->base_addr == 2, allocate space for the device and return success
1140 * (detachable devices only).
1141 */
1142 static void baycom_probe(struct net_device *dev)
1143 {
1144 const struct hdlcdrv_channel_params dflt_ch_params = {
1145 20, 2, 10, 40, 0
1146 };
1147 struct baycom_state *bc;
1148
1149 /*
1150 * not a real probe! only initialize data structures
1151 */
1152 bc = netdev_priv(dev);
1153 /*
1154 * initialize the baycom_state struct
1155 */
1156 bc->ch_params = dflt_ch_params;
1157 bc->ptt_keyed = 0;
1158
1159 /*
1160 * initialize the device struct
1161 */
1162 dev->open = epp_open;
1163 dev->stop = epp_close;
1164 dev->do_ioctl = baycom_ioctl;
1165 dev->hard_start_xmit = baycom_send_packet;
1166 dev->get_stats = baycom_get_stats;
1167
1168 /* Fill in the fields of the device structure */
1169 bc->skb = NULL;
1170
1171 dev->hard_header = ax25_hard_header;
1172 dev->rebuild_header = ax25_rebuild_header;
1173 dev->set_mac_address = baycom_set_mac_address;
1174
1175 dev->type = ARPHRD_AX25; /* AF_AX25 device */
1176 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
1177 dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
1178 dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
1179 memcpy(dev->broadcast, &ax25_bcast, AX25_ADDR_LEN);
1180 memcpy(dev->dev_addr, &null_ax25_address, AX25_ADDR_LEN);
1181 dev->tx_queue_len = 16;
1182
1183 /* New style flags */
1184 dev->flags = 0;
1185 }
1186
1187 /* --------------------------------------------------------------------- */
1188
1189 /*
1190 * command line settable parameters
1191 */
1192 static const char *mode[NR_PORTS] = { "", };
1193 static int iobase[NR_PORTS] = { 0x378, };
1194
1195 module_param_array(mode, charp, NULL, 0);
1196 MODULE_PARM_DESC(mode, "baycom operating mode");
1197 module_param_array(iobase, int, NULL, 0);
1198 MODULE_PARM_DESC(iobase, "baycom io base address");
1199
1200 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
1201 MODULE_DESCRIPTION("Baycom epp amateur radio modem driver");
1202 MODULE_LICENSE("GPL");
1203
1204 /* --------------------------------------------------------------------- */
1205
1206 static void __init baycom_epp_dev_setup(struct net_device *dev)
1207 {
1208 struct baycom_state *bc = netdev_priv(dev);
1209
1210 /*
1211 * initialize part of the baycom_state struct
1212 */
1213 bc->dev = dev;
1214 bc->magic = BAYCOM_MAGIC;
1215 bc->cfg.fclk = 19666600;
1216 bc->cfg.bps = 9600;
1217 /*
1218 * initialize part of the device struct
1219 */
1220 baycom_probe(dev);
1221 }
1222
1223 static int __init init_baycomepp(void)
1224 {
1225 int i, found = 0;
1226 char set_hw = 1;
1227
1228 printk(bc_drvinfo);
1229 /*
1230 * register net devices
1231 */
1232 for (i = 0; i < NR_PORTS; i++) {
1233 struct net_device *dev;
1234
1235 dev = alloc_netdev(sizeof(struct baycom_state), "bce%d",
1236 baycom_epp_dev_setup);
1237
1238 if (!dev) {
1239 printk(KERN_WARNING "bce%d : out of memory\n", i);
1240 return found ? 0 : -ENOMEM;
1241 }
1242
1243 sprintf(dev->name, "bce%d", i);
1244 dev->base_addr = iobase[i];
1245
1246 if (!mode[i])
1247 set_hw = 0;
1248 if (!set_hw)
1249 iobase[i] = 0;
1250
1251 if (register_netdev(dev)) {
1252 printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name);
1253 free_netdev(dev);
1254 break;
1255 }
1256 if (set_hw && baycom_setmode(netdev_priv(dev), mode[i]))
1257 set_hw = 0;
1258 baycom_device[i] = dev;
1259 found++;
1260 }
1261
1262 return found ? 0 : -ENXIO;
1263 }
1264
1265 static void __exit cleanup_baycomepp(void)
1266 {
1267 int i;
1268
1269 for(i = 0; i < NR_PORTS; i++) {
1270 struct net_device *dev = baycom_device[i];
1271
1272 if (dev) {
1273 struct baycom_state *bc = netdev_priv(dev);
1274 if (bc->magic == BAYCOM_MAGIC) {
1275 unregister_netdev(dev);
1276 free_netdev(dev);
1277 } else
1278 printk(paranoia_str, "cleanup_module");
1279 }
1280 }
1281 }
1282
1283 module_init(init_baycomepp);
1284 module_exit(cleanup_baycomepp);
1285
1286 /* --------------------------------------------------------------------- */
1287
1288 #ifndef MODULE
1289
1290 /*
1291 * format: baycom_epp=io,mode
1292 * mode: fpga config options
1293 */
1294
1295 static int __init baycom_epp_setup(char *str)
1296 {
1297 static unsigned __initdata nr_dev = 0;
1298 int ints[2];
1299
1300 if (nr_dev >= NR_PORTS)
1301 return 0;
1302 str = get_options(str, 2, ints);
1303 if (ints[0] < 1)
1304 return 0;
1305 mode[nr_dev] = str;
1306 iobase[nr_dev] = ints[1];
1307 nr_dev++;
1308 return 1;
1309 }
1310
1311 __setup("baycom_epp=", baycom_epp_setup);
1312
1313 #endif /* MODULE */
1314 /* --------------------------------------------------------------------- */
Linux with added FPC-III support