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[deliverable/linux.git] / drivers / net / hamradio / baycom_epp.c
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/config.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/smp_lock.h>
52 #include <asm/uaccess.h>
53 #include <linux/if_arp.h>
54 #include <linux/kmod.h>
55 #include <linux/hdlcdrv.h>
56 #include <linux/baycom.h>
57 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
58 /* prototypes for ax25_encapsulate and ax25_rebuild_header */
59 #include <net/ax25.h>
60 #endif /* CONFIG_AX25 || CONFIG_AX25_MODULE */
61 #include <linux/crc-ccitt.h>
62
63 /* --------------------------------------------------------------------- */
64
65 #define BAYCOM_DEBUG
66 #define BAYCOM_MAGIC 19730510
67
68 /* --------------------------------------------------------------------- */
69
70 static const char paranoia_str[] = KERN_ERR
71 "baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n";
72
73 static const char bc_drvname[] = "baycom_epp";
74 static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n"
75 KERN_INFO "baycom_epp: version 0.7 compiled " __TIME__ " " __DATE__ "\n";
76
77 /* --------------------------------------------------------------------- */
78
79 #define NR_PORTS 4
80
81 static struct net_device *baycom_device[NR_PORTS];
82
83 /* --------------------------------------------------------------------- */
84
85 /* EPP status register */
86 #define EPP_DCDBIT 0x80
87 #define EPP_PTTBIT 0x08
88 #define EPP_NREF 0x01
89 #define EPP_NRAEF 0x02
90 #define EPP_NRHF 0x04
91 #define EPP_NTHF 0x20
92 #define EPP_NTAEF 0x10
93 #define EPP_NTEF EPP_PTTBIT
94
95 /* EPP control register */
96 #define EPP_TX_FIFO_ENABLE 0x10
97 #define EPP_RX_FIFO_ENABLE 0x08
98 #define EPP_MODEM_ENABLE 0x20
99 #define EPP_LEDS 0xC0
100 #define EPP_IRQ_ENABLE 0x10
101
102 /* LPT registers */
103 #define LPTREG_ECONTROL 0x402
104 #define LPTREG_CONFIGB 0x401
105 #define LPTREG_CONFIGA 0x400
106 #define LPTREG_EPPDATA 0x004
107 #define LPTREG_EPPADDR 0x003
108 #define LPTREG_CONTROL 0x002
109 #define LPTREG_STATUS 0x001
110 #define LPTREG_DATA 0x000
111
112 /* LPT control register */
113 #define LPTCTRL_PROGRAM 0x04 /* 0 to reprogram */
114 #define LPTCTRL_WRITE 0x01
115 #define LPTCTRL_ADDRSTB 0x08
116 #define LPTCTRL_DATASTB 0x02
117 #define LPTCTRL_INTEN 0x10
118
119 /* LPT status register */
120 #define LPTSTAT_SHIFT_NINTR 6
121 #define LPTSTAT_WAIT 0x80
122 #define LPTSTAT_NINTR (1<<LPTSTAT_SHIFT_NINTR)
123 #define LPTSTAT_PE 0x20
124 #define LPTSTAT_DONE 0x10
125 #define LPTSTAT_NERROR 0x08
126 #define LPTSTAT_EPPTIMEOUT 0x01
127
128 /* LPT data register */
129 #define LPTDATA_SHIFT_TDI 0
130 #define LPTDATA_SHIFT_TMS 2
131 #define LPTDATA_TDI (1<<LPTDATA_SHIFT_TDI)
132 #define LPTDATA_TCK 0x02
133 #define LPTDATA_TMS (1<<LPTDATA_SHIFT_TMS)
134 #define LPTDATA_INITBIAS 0x80
135
136
137 /* EPP modem config/status bits */
138 #define EPP_DCDBIT 0x80
139 #define EPP_PTTBIT 0x08
140 #define EPP_RXEBIT 0x01
141 #define EPP_RXAEBIT 0x02
142 #define EPP_RXHFULL 0x04
143
144 #define EPP_NTHF 0x20
145 #define EPP_NTAEF 0x10
146 #define EPP_NTEF EPP_PTTBIT
147
148 #define EPP_TX_FIFO_ENABLE 0x10
149 #define EPP_RX_FIFO_ENABLE 0x08
150 #define EPP_MODEM_ENABLE 0x20
151 #define EPP_LEDS 0xC0
152 #define EPP_IRQ_ENABLE 0x10
153
154 /* Xilinx 4k JTAG instructions */
155 #define XC4K_IRLENGTH 3
156 #define XC4K_EXTEST 0
157 #define XC4K_PRELOAD 1
158 #define XC4K_CONFIGURE 5
159 #define XC4K_BYPASS 7
160
161 #define EPP_CONVENTIONAL 0
162 #define EPP_FPGA 1
163 #define EPP_FPGAEXTSTATUS 2
164
165 #define TXBUFFER_SIZE ((HDLCDRV_MAXFLEN*6/5)+8)
166
167 /* ---------------------------------------------------------------------- */
168 /*
169 * Information that need to be kept for each board.
170 */
171
172 struct baycom_state {
173 int magic;
174
175 struct pardevice *pdev;
176 unsigned int work_running;
177 struct work_struct run_work;
178 unsigned int modem;
179 unsigned int bitrate;
180 unsigned char stat;
181
182 struct {
183 unsigned int intclk;
184 unsigned int fclk;
185 unsigned int bps;
186 unsigned int extmodem;
187 unsigned int loopback;
188 } cfg;
189
190 struct hdlcdrv_channel_params ch_params;
191
192 struct {
193 unsigned int bitbuf, bitstream, numbits, state;
194 unsigned char *bufptr;
195 int bufcnt;
196 unsigned char buf[TXBUFFER_SIZE];
197 } hdlcrx;
198
199 struct {
200 int calibrate;
201 int slotcnt;
202 int flags;
203 enum { tx_idle = 0, tx_keyup, tx_data, tx_tail } state;
204 unsigned char *bufptr;
205 int bufcnt;
206 unsigned char buf[TXBUFFER_SIZE];
207 } hdlctx;
208
209 struct net_device_stats stats;
210 unsigned int ptt_keyed;
211 struct sk_buff *skb; /* next transmit packet */
212
213 #ifdef BAYCOM_DEBUG
214 struct debug_vals {
215 unsigned long last_jiffies;
216 unsigned cur_intcnt;
217 unsigned last_intcnt;
218 int cur_pllcorr;
219 int last_pllcorr;
220 unsigned int mod_cycles;
221 unsigned int demod_cycles;
222 } debug_vals;
223 #endif /* BAYCOM_DEBUG */
224 };
225
226 /* --------------------------------------------------------------------- */
227
228 #define KISS_VERBOSE
229
230 /* --------------------------------------------------------------------- */
231
232 #define PARAM_TXDELAY 1
233 #define PARAM_PERSIST 2
234 #define PARAM_SLOTTIME 3
235 #define PARAM_TXTAIL 4
236 #define PARAM_FULLDUP 5
237 #define PARAM_HARDWARE 6
238 #define PARAM_RETURN 255
239
240 /* --------------------------------------------------------------------- */
241 /*
242 * the CRC routines are stolen from WAMPES
243 * by Dieter Deyke
244 */
245
246
247 /*---------------------------------------------------------------------------*/
248
249 #if 0
250 static inline void append_crc_ccitt(unsigned char *buffer, int len)
251 {
252 unsigned int crc = 0xffff;
253
254 for (;len>0;len--)
255 crc = (crc >> 8) ^ crc_ccitt_table[(crc ^ *buffer++) & 0xff];
256 crc ^= 0xffff;
257 *buffer++ = crc;
258 *buffer++ = crc >> 8;
259 }
260 #endif
261
262 /*---------------------------------------------------------------------------*/
263
264 static inline int check_crc_ccitt(const unsigned char *buf, int cnt)
265 {
266 return (crc_ccitt(0xffff, buf, cnt) & 0xffff) == 0xf0b8;
267 }
268
269 /*---------------------------------------------------------------------------*/
270
271 static inline int calc_crc_ccitt(const unsigned char *buf, int cnt)
272 {
273 return (crc_ccitt(0xffff, buf, cnt) ^ 0xffff) & 0xffff;
274 }
275
276 /* ---------------------------------------------------------------------- */
277
278 #define tenms_to_flags(bc,tenms) ((tenms * bc->bitrate) / 800)
279
280 /* --------------------------------------------------------------------- */
281
282 static inline void baycom_int_freq(struct baycom_state *bc)
283 {
284 #ifdef BAYCOM_DEBUG
285 unsigned long cur_jiffies = jiffies;
286 /*
287 * measure the interrupt frequency
288 */
289 bc->debug_vals.cur_intcnt++;
290 if ((cur_jiffies - bc->debug_vals.last_jiffies) >= HZ) {
291 bc->debug_vals.last_jiffies = cur_jiffies;
292 bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt;
293 bc->debug_vals.cur_intcnt = 0;
294 bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr;
295 bc->debug_vals.cur_pllcorr = 0;
296 }
297 #endif /* BAYCOM_DEBUG */
298 }
299
300 /* ---------------------------------------------------------------------- */
301 /*
302 * eppconfig_path should be setable via /proc/sys.
303 */
304
305 static char eppconfig_path[256] = "/usr/sbin/eppfpga";
306
307 static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL };
308
309 /* eppconfig: called during ifconfig up to configure the modem */
310 static int eppconfig(struct baycom_state *bc)
311 {
312 char modearg[256];
313 char portarg[16];
314 char *argv[] = { eppconfig_path, "-s", "-p", portarg, "-m", modearg,
315 NULL };
316
317 /* set up arguments */
318 sprintf(modearg, "%sclk,%smodem,fclk=%d,bps=%d,divider=%d%s,extstat",
319 bc->cfg.intclk ? "int" : "ext",
320 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
321 (bc->cfg.fclk + 8 * bc->cfg.bps) / (16 * bc->cfg.bps),
322 bc->cfg.loopback ? ",loopback" : "");
323 sprintf(portarg, "%ld", bc->pdev->port->base);
324 printk(KERN_DEBUG "%s: %s -s -p %s -m %s\n", bc_drvname, eppconfig_path, portarg, modearg);
325
326 return call_usermodehelper(eppconfig_path, argv, envp, 1);
327 }
328
329 /* ---------------------------------------------------------------------- */
330
331 static void epp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
332 {
333 }
334
335 /* ---------------------------------------------------------------------- */
336
337 static inline void do_kiss_params(struct baycom_state *bc,
338 unsigned char *data, unsigned long len)
339 {
340
341 #ifdef KISS_VERBOSE
342 #define PKP(a,b) printk(KERN_INFO "baycomm_epp: channel params: " a "\n", b)
343 #else /* KISS_VERBOSE */
344 #define PKP(a,b)
345 #endif /* KISS_VERBOSE */
346
347 if (len < 2)
348 return;
349 switch(data[0]) {
350 case PARAM_TXDELAY:
351 bc->ch_params.tx_delay = data[1];
352 PKP("TX delay = %ums", 10 * bc->ch_params.tx_delay);
353 break;
354 case PARAM_PERSIST:
355 bc->ch_params.ppersist = data[1];
356 PKP("p persistence = %u", bc->ch_params.ppersist);
357 break;
358 case PARAM_SLOTTIME:
359 bc->ch_params.slottime = data[1];
360 PKP("slot time = %ums", bc->ch_params.slottime);
361 break;
362 case PARAM_TXTAIL:
363 bc->ch_params.tx_tail = data[1];
364 PKP("TX tail = %ums", bc->ch_params.tx_tail);
365 break;
366 case PARAM_FULLDUP:
367 bc->ch_params.fulldup = !!data[1];
368 PKP("%s duplex", bc->ch_params.fulldup ? "full" : "half");
369 break;
370 default:
371 break;
372 }
373 #undef PKP
374 }
375
376 /* --------------------------------------------------------------------- */
377
378 static void encode_hdlc(struct baycom_state *bc)
379 {
380 struct sk_buff *skb;
381 unsigned char *wp, *bp;
382 int pkt_len;
383 unsigned bitstream, notbitstream, bitbuf, numbit, crc;
384 unsigned char crcarr[2];
385 int j;
386
387 if (bc->hdlctx.bufcnt > 0)
388 return;
389 skb = bc->skb;
390 if (!skb)
391 return;
392 bc->skb = NULL;
393 pkt_len = skb->len-1; /* strip KISS byte */
394 wp = bc->hdlctx.buf;
395 bp = skb->data+1;
396 crc = calc_crc_ccitt(bp, pkt_len);
397 crcarr[0] = crc;
398 crcarr[1] = crc >> 8;
399 *wp++ = 0x7e;
400 bitstream = bitbuf = numbit = 0;
401 while (pkt_len > -2) {
402 bitstream >>= 8;
403 bitstream |= ((unsigned int)*bp) << 8;
404 bitbuf |= ((unsigned int)*bp) << numbit;
405 notbitstream = ~bitstream;
406 bp++;
407 pkt_len--;
408 if (!pkt_len)
409 bp = crcarr;
410 for (j = 0; j < 8; j++)
411 if (unlikely(!(notbitstream & (0x1f0 << j)))) {
412 bitstream &= ~(0x100 << j);
413 bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) |
414 ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1);
415 numbit++;
416 notbitstream = ~bitstream;
417 }
418 numbit += 8;
419 while (numbit >= 8) {
420 *wp++ = bitbuf;
421 bitbuf >>= 8;
422 numbit -= 8;
423 }
424 }
425 bitbuf |= 0x7e7e << numbit;
426 numbit += 16;
427 while (numbit >= 8) {
428 *wp++ = bitbuf;
429 bitbuf >>= 8;
430 numbit -= 8;
431 }
432 bc->hdlctx.bufptr = bc->hdlctx.buf;
433 bc->hdlctx.bufcnt = wp - bc->hdlctx.buf;
434 dev_kfree_skb(skb);
435 bc->stats.tx_packets++;
436 }
437
438 /* ---------------------------------------------------------------------- */
439
440 static unsigned short random_seed;
441
442 static inline unsigned short random_num(void)
443 {
444 random_seed = 28629 * random_seed + 157;
445 return random_seed;
446 }
447
448 /* ---------------------------------------------------------------------- */
449
450 static int transmit(struct baycom_state *bc, int cnt, unsigned char stat)
451 {
452 struct parport *pp = bc->pdev->port;
453 unsigned char tmp[128];
454 int i, j;
455
456 if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT))
457 bc->hdlctx.state = tx_idle;
458 if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) {
459 if (bc->hdlctx.bufcnt <= 0)
460 encode_hdlc(bc);
461 if (bc->hdlctx.bufcnt <= 0)
462 return 0;
463 if (!bc->ch_params.fulldup) {
464 if (!(stat & EPP_DCDBIT)) {
465 bc->hdlctx.slotcnt = bc->ch_params.slottime;
466 return 0;
467 }
468 if ((--bc->hdlctx.slotcnt) > 0)
469 return 0;
470 bc->hdlctx.slotcnt = bc->ch_params.slottime;
471 if ((random_num() % 256) > bc->ch_params.ppersist)
472 return 0;
473 }
474 }
475 if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) {
476 bc->hdlctx.state = tx_keyup;
477 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay);
478 bc->ptt_keyed++;
479 }
480 while (cnt > 0) {
481 switch (bc->hdlctx.state) {
482 case tx_keyup:
483 i = min_t(int, cnt, bc->hdlctx.flags);
484 cnt -= i;
485 bc->hdlctx.flags -= i;
486 if (bc->hdlctx.flags <= 0)
487 bc->hdlctx.state = tx_data;
488 memset(tmp, 0x7e, sizeof(tmp));
489 while (i > 0) {
490 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
491 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
492 return -1;
493 i -= j;
494 }
495 break;
496
497 case tx_data:
498 if (bc->hdlctx.bufcnt <= 0) {
499 encode_hdlc(bc);
500 if (bc->hdlctx.bufcnt <= 0) {
501 bc->hdlctx.state = tx_tail;
502 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail);
503 break;
504 }
505 }
506 i = min_t(int, cnt, bc->hdlctx.bufcnt);
507 bc->hdlctx.bufcnt -= i;
508 cnt -= i;
509 if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0))
510 return -1;
511 bc->hdlctx.bufptr += i;
512 break;
513
514 case tx_tail:
515 encode_hdlc(bc);
516 if (bc->hdlctx.bufcnt > 0) {
517 bc->hdlctx.state = tx_data;
518 break;
519 }
520 i = min_t(int, cnt, bc->hdlctx.flags);
521 if (i) {
522 cnt -= i;
523 bc->hdlctx.flags -= i;
524 memset(tmp, 0x7e, sizeof(tmp));
525 while (i > 0) {
526 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
527 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
528 return -1;
529 i -= j;
530 }
531 break;
532 }
533
534 default: /* fall through */
535 if (bc->hdlctx.calibrate <= 0)
536 return 0;
537 i = min_t(int, cnt, bc->hdlctx.calibrate);
538 cnt -= i;
539 bc->hdlctx.calibrate -= i;
540 memset(tmp, 0, sizeof(tmp));
541 while (i > 0) {
542 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
543 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
544 return -1;
545 i -= j;
546 }
547 break;
548 }
549 }
550 return 0;
551 }
552
553 /* ---------------------------------------------------------------------- */
554
555 static void do_rxpacket(struct net_device *dev)
556 {
557 struct baycom_state *bc = netdev_priv(dev);
558 struct sk_buff *skb;
559 unsigned char *cp;
560 unsigned pktlen;
561
562 if (bc->hdlcrx.bufcnt < 4)
563 return;
564 if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt))
565 return;
566 pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */
567 if (!(skb = dev_alloc_skb(pktlen))) {
568 printk("%s: memory squeeze, dropping packet\n", dev->name);
569 bc->stats.rx_dropped++;
570 return;
571 }
572 cp = skb_put(skb, pktlen);
573 *cp++ = 0; /* KISS kludge */
574 memcpy(cp, bc->hdlcrx.buf, pktlen - 1);
575 skb->protocol = ax25_type_trans(skb, dev);
576 netif_rx(skb);
577 dev->last_rx = jiffies;
578 bc->stats.rx_packets++;
579 }
580
581 static int receive(struct net_device *dev, int cnt)
582 {
583 struct baycom_state *bc = netdev_priv(dev);
584 struct parport *pp = bc->pdev->port;
585 unsigned int bitbuf, notbitstream, bitstream, numbits, state;
586 unsigned char tmp[128];
587 unsigned char *cp;
588 int cnt2, ret = 0;
589 int j;
590
591 numbits = bc->hdlcrx.numbits;
592 state = bc->hdlcrx.state;
593 bitstream = bc->hdlcrx.bitstream;
594 bitbuf = bc->hdlcrx.bitbuf;
595 while (cnt > 0) {
596 cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt;
597 cnt -= cnt2;
598 if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) {
599 ret = -1;
600 break;
601 }
602 cp = tmp;
603 for (; cnt2 > 0; cnt2--, cp++) {
604 bitstream >>= 8;
605 bitstream |= (*cp) << 8;
606 bitbuf >>= 8;
607 bitbuf |= (*cp) << 8;
608 numbits += 8;
609 notbitstream = ~bitstream;
610 for (j = 0; j < 8; j++) {
611
612 /* flag or abort */
613 if (unlikely(!(notbitstream & (0x0fc << j)))) {
614
615 /* abort received */
616 if (!(notbitstream & (0x1fc << j)))
617 state = 0;
618
619 /* not flag received */
620 else if (!(bitstream & (0x1fe << j)) != (0x0fc << j)) {
621 if (state)
622 do_rxpacket(dev);
623 bc->hdlcrx.bufcnt = 0;
624 bc->hdlcrx.bufptr = bc->hdlcrx.buf;
625 state = 1;
626 numbits = 7-j;
627 }
628 }
629
630 /* stuffed bit */
631 else if (unlikely((bitstream & (0x1f8 << j)) == (0xf8 << j))) {
632 numbits--;
633 bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1);
634 }
635 }
636 while (state && numbits >= 8) {
637 if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) {
638 state = 0;
639 } else {
640 *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits);
641 bc->hdlcrx.bufcnt++;
642 numbits -= 8;
643 }
644 }
645 }
646 }
647 bc->hdlcrx.numbits = numbits;
648 bc->hdlcrx.state = state;
649 bc->hdlcrx.bitstream = bitstream;
650 bc->hdlcrx.bitbuf = bitbuf;
651 return ret;
652 }
653
654 /* --------------------------------------------------------------------- */
655
656 #ifdef __i386__
657 #include <asm/msr.h>
658 #define GETTICK(x) \
659 ({ \
660 if (cpu_has_tsc) \
661 rdtscl(x); \
662 })
663 #else /* __i386__ */
664 #define GETTICK(x)
665 #endif /* __i386__ */
666
667 static void epp_bh(struct net_device *dev)
668 {
669 struct baycom_state *bc;
670 struct parport *pp;
671 unsigned char stat;
672 unsigned char tmp[2];
673 unsigned int time1 = 0, time2 = 0, time3 = 0;
674 int cnt, cnt2;
675
676 bc = netdev_priv(dev);
677 if (!bc->work_running)
678 return;
679 baycom_int_freq(bc);
680 pp = bc->pdev->port;
681 /* update status */
682 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
683 goto epptimeout;
684 bc->stat = stat;
685 bc->debug_vals.last_pllcorr = stat;
686 GETTICK(time1);
687 if (bc->modem == EPP_FPGAEXTSTATUS) {
688 /* get input count */
689 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1;
690 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
691 goto epptimeout;
692 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
693 goto epptimeout;
694 cnt = tmp[0] | (tmp[1] << 8);
695 cnt &= 0x7fff;
696 /* get output count */
697 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2;
698 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
699 goto epptimeout;
700 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
701 goto epptimeout;
702 cnt2 = tmp[0] | (tmp[1] << 8);
703 cnt2 = 16384 - (cnt2 & 0x7fff);
704 /* return to normal */
705 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
706 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
707 goto epptimeout;
708 if (transmit(bc, cnt2, stat))
709 goto epptimeout;
710 GETTICK(time2);
711 if (receive(dev, cnt))
712 goto epptimeout;
713 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
714 goto epptimeout;
715 bc->stat = stat;
716 } else {
717 /* try to tx */
718 switch (stat & (EPP_NTAEF|EPP_NTHF)) {
719 case EPP_NTHF:
720 cnt = 2048 - 256;
721 break;
722
723 case EPP_NTAEF:
724 cnt = 2048 - 1793;
725 break;
726
727 case 0:
728 cnt = 0;
729 break;
730
731 default:
732 cnt = 2048 - 1025;
733 break;
734 }
735 if (transmit(bc, cnt, stat))
736 goto epptimeout;
737 GETTICK(time2);
738 /* do receiver */
739 while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) {
740 switch (stat & (EPP_NRAEF|EPP_NRHF)) {
741 case EPP_NRAEF:
742 cnt = 1025;
743 break;
744
745 case 0:
746 cnt = 1793;
747 break;
748
749 default:
750 cnt = 256;
751 break;
752 }
753 if (receive(dev, cnt))
754 goto epptimeout;
755 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
756 goto epptimeout;
757 }
758 cnt = 0;
759 if (bc->bitrate < 50000)
760 cnt = 256;
761 else if (bc->bitrate < 100000)
762 cnt = 128;
763 while (cnt > 0 && stat & EPP_NREF) {
764 if (receive(dev, 1))
765 goto epptimeout;
766 cnt--;
767 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
768 goto epptimeout;
769 }
770 }
771 GETTICK(time3);
772 #ifdef BAYCOM_DEBUG
773 bc->debug_vals.mod_cycles = time2 - time1;
774 bc->debug_vals.demod_cycles = time3 - time2;
775 #endif /* BAYCOM_DEBUG */
776 schedule_delayed_work(&bc->run_work, 1);
777 if (!bc->skb)
778 netif_wake_queue(dev);
779 return;
780 epptimeout:
781 printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname);
782 }
783
784 /* ---------------------------------------------------------------------- */
785 /*
786 * ===================== network driver interface =========================
787 */
788
789 static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
790 {
791 struct baycom_state *bc = netdev_priv(dev);
792
793 if (skb->data[0] != 0) {
794 do_kiss_params(bc, skb->data, skb->len);
795 dev_kfree_skb(skb);
796 return 0;
797 }
798 if (bc->skb)
799 return -1;
800 /* strip KISS byte */
801 if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) {
802 dev_kfree_skb(skb);
803 return 0;
804 }
805 netif_stop_queue(dev);
806 bc->skb = skb;
807 return 0;
808 }
809
810 /* --------------------------------------------------------------------- */
811
812 static int baycom_set_mac_address(struct net_device *dev, void *addr)
813 {
814 struct sockaddr *sa = (struct sockaddr *)addr;
815
816 /* addr is an AX.25 shifted ASCII mac address */
817 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
818 return 0;
819 }
820
821 /* --------------------------------------------------------------------- */
822
823 static struct net_device_stats *baycom_get_stats(struct net_device *dev)
824 {
825 struct baycom_state *bc = netdev_priv(dev);
826
827 /*
828 * Get the current statistics. This may be called with the
829 * card open or closed.
830 */
831 return &bc->stats;
832 }
833
834 /* --------------------------------------------------------------------- */
835
836 static void epp_wakeup(void *handle)
837 {
838 struct net_device *dev = (struct net_device *)handle;
839 struct baycom_state *bc = netdev_priv(dev);
840
841 printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name);
842 if (!parport_claim(bc->pdev))
843 printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name);
844 }
845
846 /* --------------------------------------------------------------------- */
847
848 /*
849 * Open/initialize the board. This is called (in the current kernel)
850 * sometime after booting when the 'ifconfig' program is run.
851 *
852 * This routine should set everything up anew at each open, even
853 * registers that "should" only need to be set once at boot, so that
854 * there is non-reboot way to recover if something goes wrong.
855 */
856
857 static int epp_open(struct net_device *dev)
858 {
859 struct baycom_state *bc = netdev_priv(dev);
860 struct parport *pp = parport_find_base(dev->base_addr);
861 unsigned int i, j;
862 unsigned char tmp[128];
863 unsigned char stat;
864 unsigned long tstart;
865
866 if (!pp) {
867 printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr);
868 return -ENXIO;
869 }
870 #if 0
871 if (pp->irq < 0) {
872 printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base);
873 parport_put_port(pp);
874 return -ENXIO;
875 }
876 #endif
877 if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) {
878 printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n",
879 bc_drvname, pp->base);
880 parport_put_port(pp);
881 return -EIO;
882 }
883 memset(&bc->modem, 0, sizeof(bc->modem));
884 bc->pdev = parport_register_device(pp, dev->name, NULL, epp_wakeup,
885 epp_interrupt, PARPORT_DEV_EXCL, dev);
886 parport_put_port(pp);
887 if (!bc->pdev) {
888 printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base);
889 return -ENXIO;
890 }
891 if (parport_claim(bc->pdev)) {
892 printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base);
893 parport_unregister_device(bc->pdev);
894 return -EBUSY;
895 }
896 dev->irq = /*pp->irq*/ 0;
897 INIT_WORK(&bc->run_work, (void *)(void *)epp_bh, dev);
898 bc->work_running = 1;
899 bc->modem = EPP_CONVENTIONAL;
900 if (eppconfig(bc))
901 printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname);
902 else
903 bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS;
904 parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */
905 /* reset the modem */
906 tmp[0] = 0;
907 tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
908 if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2)
909 goto epptimeout;
910 /* autoprobe baud rate */
911 tstart = jiffies;
912 i = 0;
913 while ((signed)(jiffies-tstart-HZ/3) < 0) {
914 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
915 goto epptimeout;
916 if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) {
917 schedule();
918 continue;
919 }
920 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
921 goto epptimeout;
922 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
923 goto epptimeout;
924 i += 256;
925 }
926 for (j = 0; j < 256; j++) {
927 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
928 goto epptimeout;
929 if (!(stat & EPP_NREF))
930 break;
931 if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1)
932 goto epptimeout;
933 i++;
934 }
935 tstart = jiffies - tstart;
936 bc->bitrate = i * (8 * HZ) / tstart;
937 j = 1;
938 i = bc->bitrate >> 3;
939 while (j < 7 && i > 150) {
940 j++;
941 i >>= 1;
942 }
943 printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n",
944 bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2));
945 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/;
946 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
947 goto epptimeout;
948 /*
949 * initialise hdlc variables
950 */
951 bc->hdlcrx.state = 0;
952 bc->hdlcrx.numbits = 0;
953 bc->hdlctx.state = tx_idle;
954 bc->hdlctx.bufcnt = 0;
955 bc->hdlctx.slotcnt = bc->ch_params.slottime;
956 bc->hdlctx.calibrate = 0;
957 /* start the bottom half stuff */
958 schedule_delayed_work(&bc->run_work, 1);
959 netif_start_queue(dev);
960 return 0;
961
962 epptimeout:
963 printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname);
964 parport_write_control(pp, 0); /* reset the adapter */
965 parport_release(bc->pdev);
966 parport_unregister_device(bc->pdev);
967 return -EIO;
968 }
969
970 /* --------------------------------------------------------------------- */
971
972 static int epp_close(struct net_device *dev)
973 {
974 struct baycom_state *bc = netdev_priv(dev);
975 struct parport *pp = bc->pdev->port;
976 unsigned char tmp[1];
977
978 bc->work_running = 0;
979 flush_scheduled_work();
980 bc->stat = EPP_DCDBIT;
981 tmp[0] = 0;
982 pp->ops->epp_write_addr(pp, tmp, 1, 0);
983 parport_write_control(pp, 0); /* reset the adapter */
984 parport_release(bc->pdev);
985 parport_unregister_device(bc->pdev);
986 if (bc->skb)
987 dev_kfree_skb(bc->skb);
988 bc->skb = NULL;
989 printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n",
990 bc_drvname, dev->base_addr, dev->irq);
991 return 0;
992 }
993
994 /* --------------------------------------------------------------------- */
995
996 static int baycom_setmode(struct baycom_state *bc, const char *modestr)
997 {
998 const char *cp;
999
1000 if (strstr(modestr,"intclk"))
1001 bc->cfg.intclk = 1;
1002 if (strstr(modestr,"extclk"))
1003 bc->cfg.intclk = 0;
1004 if (strstr(modestr,"intmodem"))
1005 bc->cfg.extmodem = 0;
1006 if (strstr(modestr,"extmodem"))
1007 bc->cfg.extmodem = 1;
1008 if (strstr(modestr,"noloopback"))
1009 bc->cfg.loopback = 0;
1010 if (strstr(modestr,"loopback"))
1011 bc->cfg.loopback = 1;
1012 if ((cp = strstr(modestr,"fclk="))) {
1013 bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0);
1014 if (bc->cfg.fclk < 1000000)
1015 bc->cfg.fclk = 1000000;
1016 if (bc->cfg.fclk > 25000000)
1017 bc->cfg.fclk = 25000000;
1018 }
1019 if ((cp = strstr(modestr,"bps="))) {
1020 bc->cfg.bps = simple_strtoul(cp+4, NULL, 0);
1021 if (bc->cfg.bps < 1000)
1022 bc->cfg.bps = 1000;
1023 if (bc->cfg.bps > 1500000)
1024 bc->cfg.bps = 1500000;
1025 }
1026 return 0;
1027 }
1028
1029 /* --------------------------------------------------------------------- */
1030
1031 static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1032 {
1033 struct baycom_state *bc = netdev_priv(dev);
1034 struct hdlcdrv_ioctl hi;
1035
1036 if (cmd != SIOCDEVPRIVATE)
1037 return -ENOIOCTLCMD;
1038
1039 if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi)))
1040 return -EFAULT;
1041 switch (hi.cmd) {
1042 default:
1043 return -ENOIOCTLCMD;
1044
1045 case HDLCDRVCTL_GETCHANNELPAR:
1046 hi.data.cp.tx_delay = bc->ch_params.tx_delay;
1047 hi.data.cp.tx_tail = bc->ch_params.tx_tail;
1048 hi.data.cp.slottime = bc->ch_params.slottime;
1049 hi.data.cp.ppersist = bc->ch_params.ppersist;
1050 hi.data.cp.fulldup = bc->ch_params.fulldup;
1051 break;
1052
1053 case HDLCDRVCTL_SETCHANNELPAR:
1054 if (!capable(CAP_NET_ADMIN))
1055 return -EACCES;
1056 bc->ch_params.tx_delay = hi.data.cp.tx_delay;
1057 bc->ch_params.tx_tail = hi.data.cp.tx_tail;
1058 bc->ch_params.slottime = hi.data.cp.slottime;
1059 bc->ch_params.ppersist = hi.data.cp.ppersist;
1060 bc->ch_params.fulldup = hi.data.cp.fulldup;
1061 bc->hdlctx.slotcnt = 1;
1062 return 0;
1063
1064 case HDLCDRVCTL_GETMODEMPAR:
1065 hi.data.mp.iobase = dev->base_addr;
1066 hi.data.mp.irq = dev->irq;
1067 hi.data.mp.dma = dev->dma;
1068 hi.data.mp.dma2 = 0;
1069 hi.data.mp.seriobase = 0;
1070 hi.data.mp.pariobase = 0;
1071 hi.data.mp.midiiobase = 0;
1072 break;
1073
1074 case HDLCDRVCTL_SETMODEMPAR:
1075 if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev))
1076 return -EACCES;
1077 dev->base_addr = hi.data.mp.iobase;
1078 dev->irq = /*hi.data.mp.irq*/0;
1079 dev->dma = /*hi.data.mp.dma*/0;
1080 return 0;
1081
1082 case HDLCDRVCTL_GETSTAT:
1083 hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT);
1084 hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT);
1085 hi.data.cs.ptt_keyed = bc->ptt_keyed;
1086 hi.data.cs.tx_packets = bc->stats.tx_packets;
1087 hi.data.cs.tx_errors = bc->stats.tx_errors;
1088 hi.data.cs.rx_packets = bc->stats.rx_packets;
1089 hi.data.cs.rx_errors = bc->stats.rx_errors;
1090 break;
1091
1092 case HDLCDRVCTL_OLDGETSTAT:
1093 hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT);
1094 hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT);
1095 hi.data.ocs.ptt_keyed = bc->ptt_keyed;
1096 break;
1097
1098 case HDLCDRVCTL_CALIBRATE:
1099 if (!capable(CAP_SYS_RAWIO))
1100 return -EACCES;
1101 bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8;
1102 return 0;
1103
1104 case HDLCDRVCTL_DRIVERNAME:
1105 strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername));
1106 break;
1107
1108 case HDLCDRVCTL_GETMODE:
1109 sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s",
1110 bc->cfg.intclk ? "int" : "ext",
1111 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
1112 bc->cfg.loopback ? ",loopback" : "");
1113 break;
1114
1115 case HDLCDRVCTL_SETMODE:
1116 if (!capable(CAP_NET_ADMIN) || netif_running(dev))
1117 return -EACCES;
1118 hi.data.modename[sizeof(hi.data.modename)-1] = '\0';
1119 return baycom_setmode(bc, hi.data.modename);
1120
1121 case HDLCDRVCTL_MODELIST:
1122 strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x",
1123 sizeof(hi.data.modename));
1124 break;
1125
1126 case HDLCDRVCTL_MODEMPARMASK:
1127 return HDLCDRV_PARMASK_IOBASE;
1128
1129 }
1130 if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi)))
1131 return -EFAULT;
1132 return 0;
1133 }
1134
1135 /* --------------------------------------------------------------------- */
1136
1137 /*
1138 * Check for a network adaptor of this type, and return '0' if one exists.
1139 * If dev->base_addr == 0, probe all likely locations.
1140 * If dev->base_addr == 1, always return failure.
1141 * If dev->base_addr == 2, allocate space for the device and return success
1142 * (detachable devices only).
1143 */
1144 static void baycom_probe(struct net_device *dev)
1145 {
1146 static char ax25_bcast[AX25_ADDR_LEN] = {
1147 'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, '0' << 1
1148 };
1149 static char ax25_nocall[AX25_ADDR_LEN] = {
1150 'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, '1' << 1
1151 };
1152 const struct hdlcdrv_channel_params dflt_ch_params = {
1153 20, 2, 10, 40, 0
1154 };
1155 struct baycom_state *bc;
1156
1157 /*
1158 * not a real probe! only initialize data structures
1159 */
1160 bc = netdev_priv(dev);
1161 /*
1162 * initialize the baycom_state struct
1163 */
1164 bc->ch_params = dflt_ch_params;
1165 bc->ptt_keyed = 0;
1166
1167 /*
1168 * initialize the device struct
1169 */
1170 dev->open = epp_open;
1171 dev->stop = epp_close;
1172 dev->do_ioctl = baycom_ioctl;
1173 dev->hard_start_xmit = baycom_send_packet;
1174 dev->get_stats = baycom_get_stats;
1175
1176 /* Fill in the fields of the device structure */
1177 bc->skb = NULL;
1178
1179 #if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
1180 dev->hard_header = ax25_encapsulate;
1181 dev->rebuild_header = ax25_rebuild_header;
1182 #else /* CONFIG_AX25 || CONFIG_AX25_MODULE */
1183 dev->hard_header = NULL;
1184 dev->rebuild_header = NULL;
1185 #endif /* CONFIG_AX25 || CONFIG_AX25_MODULE */
1186 dev->set_mac_address = baycom_set_mac_address;
1187
1188 dev->type = ARPHRD_AX25; /* AF_AX25 device */
1189 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
1190 dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
1191 dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
1192 memcpy(dev->broadcast, ax25_bcast, AX25_ADDR_LEN);
1193 memcpy(dev->dev_addr, ax25_nocall, AX25_ADDR_LEN);
1194 dev->tx_queue_len = 16;
1195
1196 /* New style flags */
1197 dev->flags = 0;
1198 }
1199
1200 /* --------------------------------------------------------------------- */
1201
1202 /*
1203 * command line settable parameters
1204 */
1205 static const char *mode[NR_PORTS] = { "", };
1206 static int iobase[NR_PORTS] = { 0x378, };
1207
1208 module_param_array(mode, charp, NULL, 0);
1209 MODULE_PARM_DESC(mode, "baycom operating mode");
1210 module_param_array(iobase, int, NULL, 0);
1211 MODULE_PARM_DESC(iobase, "baycom io base address");
1212
1213 MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
1214 MODULE_DESCRIPTION("Baycom epp amateur radio modem driver");
1215 MODULE_LICENSE("GPL");
1216
1217 /* --------------------------------------------------------------------- */
1218
1219 static void __init baycom_epp_dev_setup(struct net_device *dev)
1220 {
1221 struct baycom_state *bc = netdev_priv(dev);
1222
1223 /*
1224 * initialize part of the baycom_state struct
1225 */
1226 bc->magic = BAYCOM_MAGIC;
1227 bc->cfg.fclk = 19666600;
1228 bc->cfg.bps = 9600;
1229 /*
1230 * initialize part of the device struct
1231 */
1232 baycom_probe(dev);
1233 }
1234
1235 static int __init init_baycomepp(void)
1236 {
1237 int i, found = 0;
1238 char set_hw = 1;
1239
1240 printk(bc_drvinfo);
1241 /*
1242 * register net devices
1243 */
1244 for (i = 0; i < NR_PORTS; i++) {
1245 struct net_device *dev;
1246
1247 dev = alloc_netdev(sizeof(struct baycom_state), "bce%d",
1248 baycom_epp_dev_setup);
1249
1250 if (!dev) {
1251 printk(KERN_WARNING "bce%d : out of memory\n", i);
1252 return found ? 0 : -ENOMEM;
1253 }
1254
1255 sprintf(dev->name, "bce%d", i);
1256 dev->base_addr = iobase[i];
1257
1258 if (!mode[i])
1259 set_hw = 0;
1260 if (!set_hw)
1261 iobase[i] = 0;
1262
1263 if (register_netdev(dev)) {
1264 printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name);
1265 free_netdev(dev);
1266 break;
1267 }
1268 if (set_hw && baycom_setmode(netdev_priv(dev), mode[i]))
1269 set_hw = 0;
1270 baycom_device[i] = dev;
1271 found++;
1272 }
1273
1274 return found ? 0 : -ENXIO;
1275 }
1276
1277 static void __exit cleanup_baycomepp(void)
1278 {
1279 int i;
1280
1281 for(i = 0; i < NR_PORTS; i++) {
1282 struct net_device *dev = baycom_device[i];
1283
1284 if (dev) {
1285 struct baycom_state *bc = netdev_priv(dev);
1286 if (bc->magic == BAYCOM_MAGIC) {
1287 unregister_netdev(dev);
1288 free_netdev(dev);
1289 } else
1290 printk(paranoia_str, "cleanup_module");
1291 }
1292 }
1293 }
1294
1295 module_init(init_baycomepp);
1296 module_exit(cleanup_baycomepp);
1297
1298 /* --------------------------------------------------------------------- */
1299
1300 #ifndef MODULE
1301
1302 /*
1303 * format: baycom_epp=io,mode
1304 * mode: fpga config options
1305 */
1306
1307 static int __init baycom_epp_setup(char *str)
1308 {
1309 static unsigned __initdata nr_dev = 0;
1310 int ints[2];
1311
1312 if (nr_dev >= NR_PORTS)
1313 return 0;
1314 str = get_options(str, 2, ints);
1315 if (ints[0] < 1)
1316 return 0;
1317 mode[nr_dev] = str;
1318 iobase[nr_dev] = ints[1];
1319 nr_dev++;
1320 return 1;
1321 }
1322
1323 __setup("baycom_epp=", baycom_epp_setup);
1324
1325 #endif /* MODULE */
1326 /* --------------------------------------------------------------------- */
Linux kernel - Deliverables
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