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[PATCH] swsusp: Use suspend_console
[pv_ops_mirror.git] / drivers / net / hamradio / baycom_epp.c
blob1ed9cccd3c11ea5bdca936de6abbe1c6bc6e4e3d
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 unsigned int work_running;
172 struct work_struct run_work;
173 unsigned int modem;
174 unsigned int bitrate;
175 unsigned char stat;
176
177 struct {
178 unsigned int intclk;
179 unsigned int fclk;
180 unsigned int bps;
181 unsigned int extmodem;
182 unsigned int loopback;
183 } cfg;
184
185 struct hdlcdrv_channel_params ch_params;
186
187 struct {
188 unsigned int bitbuf, bitstream, numbits, state;
189 unsigned char *bufptr;
190 int bufcnt;
191 unsigned char buf[TXBUFFER_SIZE];
192 } hdlcrx;
193
194 struct {
195 int calibrate;
196 int slotcnt;
197 int flags;
198 enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state;
199 unsigned char *bufptr;
200 int bufcnt;
201 unsigned char buf[TXBUFFER_SIZE];
202 } hdlctx;
203
204 struct net_device_stats stats;
205 unsigned int ptt_keyed;
206 struct sk_buff *skb; /* next transmit packet */
207
208 #ifdef BAYCOM_DEBUG
209 struct debug_vals {
210 unsigned long last_jiffies;
211 unsigned cur_intcnt;
212 unsigned last_intcnt;
213 int cur_pllcorr;
214 int last_pllcorr;
215 unsigned int mod_cycles;
216 unsigned int demod_cycles;
217 } debug_vals;
218 #endif /* BAYCOM_DEBUG */
219 };
220
221 /* --------------------------------------------------------------------- */
222
223 #define KISS_VERBOSE
224
225 /* --------------------------------------------------------------------- */
226
227 #define PARAM_TXDELAY 1
228 #define PARAM_PERSIST 2
229 #define PARAM_SLOTTIME 3
230 #define PARAM_TXTAIL 4
231 #define PARAM_FULLDUP 5
232 #define PARAM_HARDWARE 6
233 #define PARAM_RETURN 255
234
235 /* --------------------------------------------------------------------- */
236 /*
237 * the CRC routines are stolen from WAMPES
238 * by Dieter Deyke
239 */
240
241
242 /*---------------------------------------------------------------------------*/
243
244 #if 0
245 static inline void append_crc_ccitt(unsigned char *buffer, int len)
246 {
247 unsigned int crc = 0xffff;
248
249 for (;len>0;len--)
250 crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff];
251 crc ^= 0xffff;
252 *buffer++ = crc;
253 *buffer++ = crc >> 8;
254 }
255 #endif
256
257 /*---------------------------------------------------------------------------*/
258
259 static inline int check_crc_ccitt(const unsigned char *buf, int cnt)
260 {
261 return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8;
262 }
263
264 /*---------------------------------------------------------------------------*/
265
266 static inline int calc_crc_ccitt(const unsigned char *buf, int cnt)
267 {
268 return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff;
269 }
270
271 /* ---------------------------------------------------------------------- */
272
273 #define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800)
274
275 /* --------------------------------------------------------------------- */
276
277 static inline void baycom_int_freq(struct baycom_state *bc)
278 {
279 #ifdef BAYCOM_DEBUG
280 unsigned long cur_jiffies = jiffies;
281 /*
282 * measure the interrupt frequency
283 */
284 bc->debug_vals.cur_intcnt++;
285 if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) {
286 bc->debug_vals.last_jiffies = cur_jiffies;
287 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
288 bc->debug_vals.cur_intcnt = 0;
289 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
290 bc->debug_vals.cur_pllcorr = 0;
291 }
292 #endif /* BAYCOM_DEBUG */
293 }
294
295 /* ---------------------------------------------------------------------- */
296 /*
297 * eppconfig_path should be setable via /proc/sys.
298 */
299
300 static char eppconfig_path[256] = "/usr/sbin/eppfpga";
301
302 static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL };
303
304 /* eppconfig: called during ifconfig up to configure the modem */
305 static int eppconfig(struct baycom_state *bc)
306 {
307 char modearg[256];
308 char portarg[16];
309 char *argv[] = { eppconfig_path, "-s", "-p", portarg, "-m", modearg,
310 NULL };
311
312 /* set up arguments */
313 sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat",
314 bc->cfg.intclk ? "int" : "ext",
315 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
316 (bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps),
317 bc->cfg.loopback ? ",loopback" : "");
318 sprintf(portarg, "%ld", bc->pdev->port->base);
319 printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg);
320
321 return call_usermodehelper(eppconfig_path, argv, envp, 1);
322 }
323
324 /* ---------------------------------------------------------------------- */
325
326 static void epp_interrupt(int irq, void *dev_id)
327 {
328 }
329
330 /* ---------------------------------------------------------------------- */
331
332 static inline void do_kiss_params(struct baycom_state *bc,
333 unsigned char *data, unsigned long len)
334 {
335
336 #ifdef KISS_VERBOSE
337 #define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b)
338 #else /* KISS_VERBOSE */
339 #define PKP(a,b)
340 #endif /* KISS_VERBOSE */
341
342 if (len < 2)
343 return;
344 switch(data[0]) {
345 case PARAM_TXDELAY:
346 bc->ch_params.tx_delay = data[1];
347 PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay);
348 break;
349 case PARAM_PERSIST:
350 bc->ch_params.ppersist = data[1];
351 PKP("p persistence = %u", bc->ch_params.ppersist);
352 break;
353 case PARAM_SLOTTIME:
354 bc->ch_params.slottime = data[1];
355 PKP("slot time = %ums", bc->ch_params.slottime);
356 break;
357 case PARAM_TXTAIL:
358 bc->ch_params.tx_tail = data[1];
359 PKP("TX tail = %ums", bc->ch_params.tx_tail);
360 break;
361 case PARAM_FULLDUP:
362 bc->ch_params.fulldup = !!data[1];
363 PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half");
364 break;
365 default:
366 break;
367 }
368 #undef PKP
369 }
370
371 /* --------------------------------------------------------------------- */
372
373 static void encode_hdlc(struct baycom_state *bc)
374 {
375 struct sk_buff *skb;
376 unsigned char *wp, *bp;
377 int pkt_len;
378 unsigned bitstream, notbitstream, bitbuf, numbit, crc;
379 unsigned char crcarr[2];
380 int j;
381
382 if (bc->hdlctx.bufcnt > 0)
383 return;
384 skb = bc->skb;
385 if (!skb)
386 return;
387 bc->skb = NULL;
388 pkt_len = skb->len-1; /* strip KISS byte */
389 wp = bc->hdlctx.buf;
390 bp = skb->data+1;
391 crc = calc_crc_ccitt(bp, pkt_len);
392 crcarr[0] = crc;
393 crcarr[1] = crc >> 8;
394 *wp++ = 0x7e;
395 bitstream = bitbuf = numbit = 0;
396 while (pkt_len > -2) {
397 bitstream >>= 8;
398 bitstream |= ((unsigned int)*bp) << 8;
399 bitbuf |= ((unsigned int)*bp) << numbit;
400 notbitstream = ~bitstream;
401 bp++;
402 pkt_len--;
403 if (!pkt_len)
404 bp = crcarr;
405 for (j = 0; j < 8; j++)
406 if (unlikely(!(notbitstream & (0x1f0 << j)))) {
407 bitstream &= ~(0x100 << j);
408 bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) |
409 ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1);
410 numbit++;
411 notbitstream = ~bitstream;
412 }
413 numbit += 8;
414 while (numbit >= 8) {
415 *wp++ = bitbuf;
416 bitbuf >>= 8;
417 numbit -= 8;
418 }
419 }
420 bitbuf |= 0x7e7e << numbit;
421 numbit += 16;
422 while (numbit >= 8) {
423 *wp++ = bitbuf;
424 bitbuf >>= 8;
425 numbit -= 8;
426 }
427 bc->hdlctx.bufptr = bc->hdlctx.buf;
428 bc->hdlctx.bufcnt = wp - bc->hdlctx.buf;
429 dev_kfree_skb(skb);
430 bc->stats.tx_packets++;
431 }
432
433 /* ---------------------------------------------------------------------- */
434
435 static unsigned short random_seed;
436
437 static inline unsigned short random_num(void)
438 {
439 random_seed = 28629 * random_seed + 157;
440 return random_seed;
441 }
442
443 /* ---------------------------------------------------------------------- */
444
445 static int transmit(struct baycom_state *bc, int cnt, unsigned char stat)
446 {
447 struct parport *pp = bc->pdev->port;
448 unsigned char tmp[128];
449 int i, j;
450
451 if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT))
452 bc->hdlctx.state = tx_idle;
453 if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) {
454 if (bc->hdlctx.bufcnt <= 0)
455 encode_hdlc(bc);
456 if (bc->hdlctx.bufcnt <= 0)
457 return 0;
458 if (!bc->ch_params.fulldup) {
459 if (!(stat & EPP_DCDBIT)) {
460 bc->hdlctx.slotcnt = bc->ch_params.slottime;
461 return 0;
462 }
463 if ((--bc->hdlctx.slotcnt) > 0)
464 return 0;
465 bc->hdlctx.slotcnt = bc->ch_params.slottime;
466 if ((random_num() % 256) > bc->ch_params.ppersist)
467 return 0;
468 }
469 }
470 if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) {
471 bc->hdlctx.state = tx_keyup;
472 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay);
473 bc->ptt_keyed++;
474 }
475 while (cnt > 0) {
476 switch (bc->hdlctx.state) {
477 case tx_keyup:
478 i = min_t(int, cnt, bc->hdlctx.flags);
479 cnt -= i;
480 bc->hdlctx.flags -= i;
481 if (bc->hdlctx.flags <= 0)
482 bc->hdlctx.state = tx_data;
483 memset(tmp, 0x7e, sizeof(tmp));
484 while (i > 0) {
485 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
486 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
487 return -1;
488 i -= j;
489 }
490 break;
491
492 case tx_data:
493 if (bc->hdlctx.bufcnt <= 0) {
494 encode_hdlc(bc);
495 if (bc->hdlctx.bufcnt <= 0) {
496 bc->hdlctx.state = tx_tail;
497 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail);
498 break;
499 }
500 }
501 i = min_t(int, cnt, bc->hdlctx.bufcnt);
502 bc->hdlctx.bufcnt -= i;
503 cnt -= i;
504 if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0))
505 return -1;
506 bc->hdlctx.bufptr += i;
507 break;
508
509 case tx_tail:
510 encode_hdlc(bc);
511 if (bc->hdlctx.bufcnt > 0) {
512 bc->hdlctx.state = tx_data;
513 break;
514 }
515 i = min_t(int, cnt, bc->hdlctx.flags);
516 if (i) {
517 cnt -= i;
518 bc->hdlctx.flags -= i;
519 memset(tmp, 0x7e, sizeof(tmp));
520 while (i > 0) {
521 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
522 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
523 return -1;
524 i -= j;
525 }
526 break;
527 }
528
529 default: /* fall through */
530 if (bc->hdlctx.calibrate <= 0)
531 return 0;
532 i = min_t(int, cnt, bc->hdlctx.calibrate);
533 cnt -= i;
534 bc->hdlctx.calibrate -= i;
535 memset(tmp, 0, sizeof(tmp));
536 while (i > 0) {
537 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
538 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
539 return -1;
540 i -= j;
541 }
542 break;
543 }
544 }
545 return 0;
546 }
547
548 /* ---------------------------------------------------------------------- */
549
550 static void do_rxpacket(struct net_device *dev)
551 {
552 struct baycom_state *bc = netdev_priv(dev);
553 struct sk_buff *skb;
554 unsigned char *cp;
555 unsigned pktlen;
556
557 if (bc->hdlcrx.bufcnt < 4)
558 return;
559 if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt))
560 return;
561 pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */
562 if (!(skb = dev_alloc_skb(pktlen))) {
563 printk("%s: memory squeeze, dropping packet\n", dev->name);
564 bc->stats.rx_dropped++;
565 return;
566 }
567 cp = skb_put(skb, pktlen);
568 *cp++ = 0; /* KISS kludge */
569 memcpy(cp, bc->hdlcrx.buf, pktlen - 1);
570 skb->protocol = ax25_type_trans(skb, dev);
571 netif_rx(skb);
572 dev->last_rx = jiffies;
573 bc->stats.rx_packets++;
574 }
575
576 static int receive(struct net_device *dev, int cnt)
577 {
578 struct baycom_state *bc = netdev_priv(dev);
579 struct parport *pp = bc->pdev->port;
580 unsigned int bitbuf, notbitstream, bitstream, numbits, state;
581 unsigned char tmp[128];
582 unsigned char *cp;
583 int cnt2, ret = 0;
584 int j;
585
586 numbits = bc->hdlcrx.numbits;
587 state = bc->hdlcrx.state;
588 bitstream = bc->hdlcrx.bitstream;
589 bitbuf = bc->hdlcrx.bitbuf;
590 while (cnt > 0) {
591 cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt;
592 cnt -= cnt2;
593 if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) {
594 ret = -1;
595 break;
596 }
597 cp = tmp;
598 for (; cnt2 > 0; cnt2--, cp++) {
599 bitstream >>= 8;
600 bitstream |= (*cp) << 8;
601 bitbuf >>= 8;
602 bitbuf |= (*cp) << 8;
603 numbits += 8;
604 notbitstream = ~bitstream;
605 for (j = 0; j < 8; j++) {
606
607 /* flag or abort */
608 if (unlikely(!(notbitstream & (0x0fc << j)))) {
609
610 /* abort received */
611 if (!(notbitstream & (0x1fc << j)))
612 state = 0;
613
614 /* not flag received */
615 else if (!(bitstream & (0x1fe << j)) != (0x0fc << j)) {
616 if (state)
617 do_rxpacket(dev);
618 bc->hdlcrx.bufcnt = 0;
619 bc->hdlcrx.bufptr = bc->hdlcrx.buf;
620 state = 1;
621 numbits = 7-j;
622 }
623 }
624
625 /* stuffed bit */
626 else if (unlikely((bitstream & (0x1f8 << j)) == (0xf8 << j))) {
627 numbits--;
628 bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1);
629 }
630 }
631 while (state && numbits >= 8) {
632 if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) {
633 state = 0;
634 } else {
635 *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits);
636 bc->hdlcrx.bufcnt++;
637 numbits -= 8;
638 }
639 }
640 }
641 }
642 bc->hdlcrx.numbits = numbits;
643 bc->hdlcrx.state = state;
644 bc->hdlcrx.bitstream = bitstream;
645 bc->hdlcrx.bitbuf = bitbuf;
646 return ret;
647 }
648
649 /* --------------------------------------------------------------------- */
650
651 #ifdef __i386__
652 #include <asm/msr.h>
653 #define GETTICK(x) \
654 ({ \
655 if (cpu_has_tsc) \
656 rdtscl(x); \
657 })
658 #else /* __i386__ */
659 #define GETTICK(x)
660 #endif /* __i386__ */
661
662 static void epp_bh(struct net_device *dev)
663 {
664 struct baycom_state *bc;
665 struct parport *pp;
666 unsigned char stat;
667 unsigned char tmp[2];
668 unsigned int time1 = 0, time2 = 0, time3 = 0;
669 int cnt, cnt2;
670
671 bc = netdev_priv(dev);
672 if (!bc->work_running)
673 return;
674 baycom_int_freq(bc);
675 pp = bc->pdev->port;
676 /* update status */
677 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
678 goto epptimeout;
679 bc->stat = stat;
680 bc->debug_vals.last_pllcorr = stat;
681 GETTICK(time1);
682 if (bc->modem == EPP_FPGAEXTSTATUS) {
683 /* get input count */
684 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1;
685 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
686 goto epptimeout;
687 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
688 goto epptimeout;
689 cnt = tmp[0] | (tmp[1] << 8);
690 cnt &= 0x7fff;
691 /* get output count */
692 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2;
693 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
694 goto epptimeout;
695 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
696 goto epptimeout;
697 cnt2 = tmp[0] | (tmp[1] << 8);
698 cnt2 = 16384 - (cnt2 & 0x7fff);
699 /* return to normal */
700 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
701 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
702 goto epptimeout;
703 if (transmit(bc, cnt2, stat))
704 goto epptimeout;
705 GETTICK(time2);
706 if (receive(dev, cnt))
707 goto epptimeout;
708 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
709 goto epptimeout;
710 bc->stat = stat;
711 } else {
712 /* try to tx */
713 switch (stat & (EPP_NTAEF|EPP_NTHF)) {
714 case EPP_NTHF:
715 cnt = 2048 - 256;
716 break;
717
718 case EPP_NTAEF:
719 cnt = 2048 - 1793;
720 break;
721
722 case 0:
723 cnt = 0;
724 break;
725
726 default:
727 cnt = 2048 - 1025;
728 break;
729 }
730 if (transmit(bc, cnt, stat))
731 goto epptimeout;
732 GETTICK(time2);
733 /* do receiver */
734 while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) {
735 switch (stat & (EPP_NRAEF|EPP_NRHF)) {
736 case EPP_NRAEF:
737 cnt = 1025;
738 break;
739
740 case 0:
741 cnt = 1793;
742 break;
743
744 default:
745 cnt = 256;
746 break;
747 }
748 if (receive(dev, cnt))
749 goto epptimeout;
750 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
751 goto epptimeout;
752 }
753 cnt = 0;
754 if (bc->bitrate < 50000)
755 cnt = 256;
756 else if (bc->bitrate < 100000)
757 cnt = 128;
758 while (cnt > 0 && stat & EPP_NREF) {
759 if (receive(dev, 1))
760 goto epptimeout;
761 cnt--;
762 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
763 goto epptimeout;
764 }
765 }
766 GETTICK(time3);
767 #ifdef BAYCOM_DEBUG
768 bc->debug_vals.mod_cycles = time2 - time1;
769 bc->debug_vals.demod_cycles = time3 - time2;
770 #endif /* BAYCOM_DEBUG */
771 schedule_delayed_work(&bc->run_work, 1);
772 if (!bc->skb)
773 netif_wake_queue(dev);
774 return;
775 epptimeout:
776 printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname);
777 }
778
779 /* ---------------------------------------------------------------------- */
780 /*
781 * ===================== network driver interface =========================
782 */
783
784 static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
785 {
786 struct baycom_state *bc = netdev_priv(dev);
787
788 if (skb->data[0] != 0) {
789 do_kiss_params(bc, skb->data, skb->len);
790 dev_kfree_skb(skb);
791 return 0;
792 }
793 if (bc->skb)
794 return -1;
795 /* strip KISS byte */
796 if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) {
797 dev_kfree_skb(skb);
798 return 0;
799 }
800 netif_stop_queue(dev);
801 bc->skb = skb;
802 return 0;
803 }
804
805 /* --------------------------------------------------------------------- */
806
807 static int baycom_set_mac_address(struct net_device *dev, void *addr)
808 {
809 struct sockaddr *sa = (struct sockaddr *)addr;
810
811 /* addr is an AX.25 shifted ASCII mac address */
812 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
813 return 0;
814 }
815
816 /* --------------------------------------------------------------------- */
817
818 static struct net_device_stats *baycom_get_stats(struct net_device *dev)
819 {
820 struct baycom_state *bc = netdev_priv(dev);
821
822 /*
823 * Get the current statistics. This may be called with the
824 * card open or closed.
825 */
826 return &bc->stats;
827 }
828
829 /* --------------------------------------------------------------------- */
830
831 static void epp_wakeup(void *handle)
832 {
833 struct net_device *dev = (struct net_device *)handle;
834 struct baycom_state *bc = netdev_priv(dev);
835
836 printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name);
837 if (!parport_claim(bc->pdev))
838 printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name);
839 }
840
841 /* --------------------------------------------------------------------- */
842
843 /*
844 * Open/initialize the board. This is called (in the current kernel)
845 * sometime after booting when the 'ifconfig' program is run.
846 *
847 * This routine should set everything up anew at each open, even
848 * registers that "should" only need to be set once at boot, so that
849 * there is non-reboot way to recover if something goes wrong.
850 */
851
852 static int epp_open(struct net_device *dev)
853 {
854 struct baycom_state *bc = netdev_priv(dev);
855 struct parport *pp = parport_find_base(dev->base_addr);
856 unsigned int i, j;
857 unsigned char tmp[128];
858 unsigned char stat;
859 unsigned long tstart;
860
861 if (!pp) {
862 printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr);
863 return -ENXIO;
864 }
865 #if 0
866 if (pp->irq < 0) {
867 printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base);
868 parport_put_port(pp);
869 return -ENXIO;
870 }
871 #endif
872 if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) {
873 printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n",
874 bc_drvname, pp->base);
875 parport_put_port(pp);
876 return -EIO;
877 }
878 memset(&bc->modem, 0, sizeof(bc->modem));
879 bc->pdev = parport_register_device(pp, dev->name, NULL, epp_wakeup,
880 epp_interrupt, PARPORT_DEV_EXCL, dev);
881 parport_put_port(pp);
882 if (!bc->pdev) {
883 printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base);
884 return -ENXIO;
885 }
886 if (parport_claim(bc->pdev)) {
887 printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base);
888 parport_unregister_device(bc->pdev);
889 return -EBUSY;
890 }
891 dev->irq = /*pp->irq*/ 0;
892 INIT_WORK(&bc->run_work, (void *)(void *)epp_bh, dev);
893 bc->work_running = 1;
894 bc->modem = EPP_CONVENTIONAL;
895 if (eppconfig(bc))
896 printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname);
897 else
898 bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS;
899 parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */
900 /* reset the modem */
901 tmp[0] = 0;
902 tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
903 if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2)
904 goto epptimeout;
905 /* autoprobe baud rate */
906 tstart = jiffies;
907 i = 0;
908 while (time_before(jiffies, tstart + HZ/3)) {
909 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
910 goto epptimeout;
911 if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) {
912 schedule();
913 continue;
914 }
915 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
916 goto epptimeout;
917 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
918 goto epptimeout;
919 i += 256;
920 }
921 for (j = 0; j < 256; j++) {
922 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
923 goto epptimeout;
924 if (!(stat & EPP_NREF))
925 break;
926 if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1)
927 goto epptimeout;
928 i++;
929 }
930 tstart = jiffies - tstart;
931 bc->bitrate = i * (8 * HZ) / tstart;
932 j = 1;
933 i = bc->bitrate >> 3;
934 while (j < 7 && i > 150) {
935 j++;
936 i >>= 1;
937 }
938 printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n",
939 bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2));
940 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/;
941 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
942 goto epptimeout;
943 /*
944 * initialise hdlc variables
945 */
946 bc->hdlcrx.state = 0;
947 bc->hdlcrx.numbits = 0;
948 bc->hdlctx.state = tx_idle;
949 bc->hdlctx.bufcnt = 0;
950 bc->hdlctx.slotcnt = bc->ch_params.slottime;
951 bc->hdlctx.calibrate = 0;
952 /* start the bottom half stuff */
953 schedule_delayed_work(&bc->run_work, 1);
954 netif_start_queue(dev);
955 return 0;
956
957 epptimeout:
958 printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname);
959 parport_write_control(pp, 0); /* reset the adapter */
960 parport_release(bc->pdev);
961 parport_unregister_device(bc->pdev);
962 return -EIO;
963 }
964
965 /* --------------------------------------------------------------------- */
966
967 static int epp_close(struct net_device *dev)
968 {
969 struct baycom_state *bc = netdev_priv(dev);
970 struct parport *pp = bc->pdev->port;
971 unsigned char tmp[1];
972
973 bc->work_running = 0;
974 flush_scheduled_work();
975 bc->stat = EPP_DCDBIT;
976 tmp[0] = 0;
977 pp->ops->epp_write_addr(pp, tmp, 1, 0);
978 parport_write_control(pp, 0); /* reset the adapter */
979 parport_release(bc->pdev);
980 parport_unregister_device(bc->pdev);
981 if (bc->skb)
982 dev_kfree_skb(bc->skb);
983 bc->skb = NULL;
984 printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n",
985 bc_drvname, dev->base_addr, dev->irq);
986 return 0;
987 }
988
989 /* --------------------------------------------------------------------- */
990
991 static int baycom_setmode(struct baycom_state *bc, const char *modestr)
992 {
993 const char *cp;
994
995 if (strstr(modestr,"intclk"))
996 bc->cfg.intclk = 1;
997 if (strstr(modestr,"extclk"))
998 bc->cfg.intclk = 0;
999 if (strstr(modestr,"intmodem"))
1000 bc->cfg.extmodem = 0;
1001 if (strstr(modestr,"extmodem"))
1002 bc->cfg.extmodem = 1;
1003 if (strstr(modestr,"noloopback"))
1004 bc->cfg.loopback = 0;
1005 if (strstr(modestr,"loopback"))
1006 bc->cfg.loopback = 1;
1007 if ((cp = strstr(modestr,"fclk="))) {
1008 bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0);
1009 if (bc->cfg.fclk < 1000000)
1010 bc->cfg.fclk = 1000000;
1011 if (bc->cfg.fclk > 25000000)
1012 bc->cfg.fclk = 25000000;
1013 }
1014 if ((cp = strstr(modestr,"bps="))) {
1015 bc->cfg.bps = simple_strtoul(cp+4, NULL, 0);
1016 if (bc->cfg.bps < 1000)
1017 bc->cfg.bps = 1000;
1018 if (bc->cfg.bps > 1500000)
1019 bc->cfg.bps = 1500000;
1020 }
1021 return 0;
1022 }
1023
1024 /* --------------------------------------------------------------------- */
1025
1026 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1027 {
1028 struct baycom_state *bc = netdev_priv(dev);
1029 struct hdlcdrv_ioctl hi;
1030
1031 if (cmd != SIOCDEVPRIVATE)
1032 return -ENOIOCTLCMD;
1033
1034 if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi)))
1035 return -EFAULT;
1036 switch (hi.cmd) {
1037 default:
1038 return -ENOIOCTLCMD;
1039
1040 case HDLCDRVCTL_GETCHANNELPAR:
1041 hi.data.cp.tx_delay = bc->ch_params.tx_delay;
1042 hi.data.cp.tx_tail = bc->ch_params.tx_tail;
1043 hi.data.cp.slottime = bc->ch_params.slottime;
1044 hi.data.cp.ppersist = bc->ch_params.ppersist;
1045 hi.data.cp.fulldup = bc->ch_params.fulldup;
1046 break;
1047
1048 case HDLCDRVCTL_SETCHANNELPAR:
1049 if (!capable(CAP_NET_ADMIN))
1050 return -EACCES;
1051 bc->ch_params.tx_delay = hi.data.cp.tx_delay;
1052 bc->ch_params.tx_tail = hi.data.cp.tx_tail;
1053 bc->ch_params.slottime = hi.data.cp.slottime;
1054 bc->ch_params.ppersist = hi.data.cp.ppersist;
1055 bc->ch_params.fulldup = hi.data.cp.fulldup;
1056 bc->hdlctx.slotcnt = 1;
1057 return 0;
1058
1059 case HDLCDRVCTL_GETMODEMPAR:
1060 hi.data.mp.iobase = dev->base_addr;
1061 hi.data.mp.irq = dev->irq;
1062 hi.data.mp.dma = dev->dma;
1063 hi.data.mp.dma2 = 0;
1064 hi.data.mp.seriobase = 0;
1065 hi.data.mp.pariobase = 0;
1066 hi.data.mp.midiiobase = 0;
1067 break;
1068
1069 case HDLCDRVCTL_SETMODEMPAR:
1070 if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev))
1071 return -EACCES;
1072 dev->base_addr = hi.data.mp.iobase;
1073 dev->irq = /*hi.data.mp.irq*/0;
1074 dev->dma = /*hi.data.mp.dma*/0;
1075 return 0;
1076
1077 case HDLCDRVCTL_GETSTAT:
1078 hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT);
1079 hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT);
1080 hi.data.cs.ptt_keyed = bc->ptt_keyed;
1081 hi.data.cs.tx_packets = bc->stats.tx_packets;
1082 hi.data.cs.tx_errors = bc->stats.tx_errors;
1083 hi.data.cs.rx_packets = bc->stats.rx_packets;
1084 hi.data.cs.rx_errors = bc->stats.rx_errors;
1085 break;
1086
1087 case HDLCDRVCTL_OLDGETSTAT:
1088 hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT);
1089 hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT);
1090 hi.data.ocs.ptt_keyed = bc->ptt_keyed;
1091 break;
1092
1093 case HDLCDRVCTL_CALIBRATE:
1094 if (!capable(CAP_SYS_RAWIO))
1095 return -EACCES;
1096 bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8;
1097 return 0;
1098
1099 case HDLCDRVCTL_DRIVERNAME:
1100 strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername));
1101 break;
1102
1103 case HDLCDRVCTL_GETMODE:
1104 sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s",
1105 bc->cfg.intclk ? "int" : "ext",
1106 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
1107 bc->cfg.loopback ? ",loopback" : "");
1108 break;
1109
1110 case HDLCDRVCTL_SETMODE:
1111 if (!capable(CAP_NET_ADMIN) || netif_running(dev))
1112 return -EACCES;
1113 hi.data.modename[sizeof(hi.data.modename)-1] = '\0';
1114 return baycom_setmode(bc, hi.data.modename);
1115
1116 case HDLCDRVCTL_MODELIST:
1117 strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x",
1118 sizeof(hi.data.modename));
1119 break;
1120
1121 case HDLCDRVCTL_MODEMPARMASK:
1122 return HDLCDRV_PARMASK_IOBASE;
1123
1124 }
1125 if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi)))
1126 return -EFAULT;
1127 return 0;
1128 }
1129
1130 /* --------------------------------------------------------------------- */
1131
1132 /*
1133 * Check for a network adaptor of this type, and return '0' if one exists.
1134 * If dev->base_addr == 0, probe all likely locations.
1135 * If dev->base_addr == 1, always return failure.
1136 * If dev->base_addr == 2, allocate space for the device and return success
1137 * (detachable devices only).
1138 */
1139 static void baycom_probe(struct net_device *dev)
1140 {
1141 static char ax25_bcast[AX25_ADDR_LEN] = {
1142 'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, '0' << 1
1143 };
1144 static char ax25_nocall[AX25_ADDR_LEN] = {
1145 'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, '1' << 1
1146 };
1147 const struct hdlcdrv_channel_params dflt_ch_params = {
1148 20, 2, 10, 40, 0
1149 };
1150 struct baycom_state *bc;
1151
1152 /*
1153 * not a real probe! only initialize data structures
1154 */
1155 bc = netdev_priv(dev);
1156 /*
1157 * initialize the baycom_state struct
1158 */
1159 bc->ch_params = dflt_ch_params;
1160 bc->ptt_keyed = 0;
1161
1162 /*
1163 * initialize the device struct
1164 */
1165 dev->open = epp_open;
1166 dev->stop = epp_close;
1167 dev->do_ioctl = baycom_ioctl;
1168 dev->hard_start_xmit = baycom_send_packet;
1169 dev->get_stats = baycom_get_stats;
1170
1171 /* Fill in the fields of the device structure */
1172 bc->skb = NULL;
1173
1174 dev->hard_header = ax25_hard_header;
1175 dev->rebuild_header = ax25_rebuild_header;
1176 dev->set_mac_address = baycom_set_mac_address;
1177
1178 dev->type = ARPHRD_AX25; /* AF_AX25 device */
1179 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
1180 dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
1181 dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
1182 memcpy(dev->broadcast, ax25_bcast, AX25_ADDR_LEN);
1183 memcpy(dev->dev_addr, ax25_nocall, AX25_ADDR_LEN);
1184 dev->tx_queue_len = 16;
1185
1186 /* New style flags */
1187 dev->flags = 0;
1188 }
1189
1190 /* --------------------------------------------------------------------- */
1191
1192 /*
1193 * command line settable parameters
1194 */
1195 static const char *mode[NR_PORTS] = { "", };
1196 static int iobase[NR_PORTS] = { 0x378, };
1197
1198 module_param_array(mode, charp, NULL, 0);
1199 MODULE_PARM_DESC(mode, "baycom operating mode");
1200 module_param_array(iobase, int, NULL, 0);
1201 MODULE_PARM_DESC(iobase, "baycom io base address");
1202
1203 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
1204 MODULE_DESCRIPTION("Baycom epp amateur radio modem driver");
1205 MODULE_LICENSE("GPL");
1206
1207 /* --------------------------------------------------------------------- */
1208
1209 static void __init baycom_epp_dev_setup(struct net_device *dev)
1210 {
1211 struct baycom_state *bc = netdev_priv(dev);
1212
1213 /*
1214 * initialize part of the baycom_state struct
1215 */
1216 bc->magic = BAYCOM_MAGIC;
1217 bc->cfg.fclk = 19666600;
1218 bc->cfg.bps = 9600;
1219 /*
1220 * initialize part of the device struct
1221 */
1222 baycom_probe(dev);
1223 }
1224
1225 static int __init init_baycomepp(void)
1226 {
1227 int i, found = 0;
1228 char set_hw = 1;
1229
1230 printk(bc_drvinfo);
1231 /*
1232 * register net devices
1233 */
1234 for (i = 0; i < NR_PORTS; i++) {
1235 struct net_device *dev;
1236
1237 dev = alloc_netdev(sizeof(struct baycom_state), "bce%d",
1238 baycom_epp_dev_setup);
1239
1240 if (!dev) {
1241 printk(KERN_WARNING "bce%d : out of memory\n", i);
1242 return found ? 0 : -ENOMEM;
1243 }
1244
1245 sprintf(dev->name, "bce%d", i);
1246 dev->base_addr = iobase[i];
1247
1248 if (!mode[i])
1249 set_hw = 0;
1250 if (!set_hw)
1251 iobase[i] = 0;
1252
1253 if (register_netdev(dev)) {
1254 printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name);
1255 free_netdev(dev);
1256 break;
1257 }
1258 if (set_hw && baycom_setmode(netdev_priv(dev), mode[i]))
1259 set_hw = 0;
1260 baycom_device[i] = dev;
1261 found++;
1262 }
1263
1264 return found ? 0 : -ENXIO;
1265 }
1266
1267 static void __exit cleanup_baycomepp(void)
1268 {
1269 int i;
1270
1271 for(i = 0; i < NR_PORTS; i++) {
1272 struct net_device *dev = baycom_device[i];
1273
1274 if (dev) {
1275 struct baycom_state *bc = netdev_priv(dev);
1276 if (bc->magic == BAYCOM_MAGIC) {
1277 unregister_netdev(dev);
1278 free_netdev(dev);
1279 } else
1280 printk(paranoia_str, "cleanup_module");
1281 }
1282 }
1283 }
1284
1285 module_init(init_baycomepp);
1286 module_exit(cleanup_baycomepp);
1287
1288 /* --------------------------------------------------------------------- */
1289
1290 #ifndef MODULE
1291
1292 /*
1293 * format: baycom_epp=io,mode
1294 * mode: fpga config options
1295 */
1296
1297 static int __init baycom_epp_setup(char *str)
1298 {
1299 static unsigned __initdata nr_dev = 0;
1300 int ints[2];
1301
1302 if (nr_dev >= NR_PORTS)
1303 return 0;
1304 str = get_options(str, 2, ints);
1305 if (ints[0] < 1)
1306 return 0;
1307 mode[nr_dev] = str;
1308 iobase[nr_dev] = ints[1];
1309 nr_dev++;
1310 return 1;
1311 }
1312
1313 __setup("baycom_epp=", baycom_epp_setup);
1314
1315 #endif /* MODULE */
1316 /* --------------------------------------------------------------------- */
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