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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/hamradio/baycom_epp.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/net/hamradio/baycom_epp.c')
-rw-r--r--drivers/net/hamradio/baycom_epp.c1382
1 files changed, 1382 insertions, 0 deletions
diff --git a/drivers/net/hamradio/baycom_epp.c b/drivers/net/hamradio/baycom_epp.c
new file mode 100644
index 000000000000..e8cb87d906fc
--- /dev/null
+++ b/drivers/net/hamradio/baycom_epp.c
@@ -0,0 +1,1382 @@
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
70static const char paranoia_str[] = KERN_ERR
71 "baycom_epp: bad magic number for hdlcdrv_state struct in routine %s\n";
72
73static const char bc_drvname[] = "baycom_epp";
74static const char bc_drvinfo[] = KERN_INFO "baycom_epp: (C) 1998-2000 Thomas Sailer, HB9JNX/AE4WA\n"
75KERN_INFO "baycom_epp: version 0.7 compiled " __TIME__ " " __DATE__ "\n";
76
77/* --------------------------------------------------------------------- */
78
79#define NR_PORTS 4
80
81static 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
172struct 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
250static 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
264static 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
271static 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
282static 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
305static char eppconfig_path[256] = "/usr/sbin/eppfpga";
306
307static char *envp[] = { "HOME=/", "TERM=linux", "PATH=/usr/bin:/bin", NULL };
308
309/* eppconfig: called during ifconfig up to configure the modem */
310static 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
331static void epp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
332{
333}
334
335/* ---------------------------------------------------------------------- */
336
337static 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 * high performance HDLC encoder
379 * yes, it's ugly, but generates pretty good code
380 */
381
382#define ENCODEITERA(j) \
383({ \
384 if (!(notbitstream & (0x1f0 << j))) \
385 goto stuff##j; \
386 encodeend##j: ; \
387})
388
389#define ENCODEITERB(j) \
390({ \
391 stuff##j: \
392 bitstream &= ~(0x100 << j); \
393 bitbuf = (bitbuf & (((2 << j) << numbit) - 1)) | \
394 ((bitbuf & ~(((2 << j) << numbit) - 1)) << 1); \
395 numbit++; \
396 notbitstream = ~bitstream; \
397 goto encodeend##j; \
398})
399
400
401static void encode_hdlc(struct baycom_state *bc)
402{
403 struct sk_buff *skb;
404 unsigned char *wp, *bp;
405 int pkt_len;
406 unsigned bitstream, notbitstream, bitbuf, numbit, crc;
407 unsigned char crcarr[2];
408
409 if (bc->hdlctx.bufcnt > 0)
410 return;
411 skb = bc->skb;
412 if (!skb)
413 return;
414 bc->skb = NULL;
415 pkt_len = skb->len-1; /* strip KISS byte */
416 wp = bc->hdlctx.buf;
417 bp = skb->data+1;
418 crc = calc_crc_ccitt(bp, pkt_len);
419 crcarr[0] = crc;
420 crcarr[1] = crc >> 8;
421 *wp++ = 0x7e;
422 bitstream = bitbuf = numbit = 0;
423 while (pkt_len > -2) {
424 bitstream >>= 8;
425 bitstream |= ((unsigned int)*bp) << 8;
426 bitbuf |= ((unsigned int)*bp) << numbit;
427 notbitstream = ~bitstream;
428 bp++;
429 pkt_len--;
430 if (!pkt_len)
431 bp = crcarr;
432 ENCODEITERA(0);
433 ENCODEITERA(1);
434 ENCODEITERA(2);
435 ENCODEITERA(3);
436 ENCODEITERA(4);
437 ENCODEITERA(5);
438 ENCODEITERA(6);
439 ENCODEITERA(7);
440 goto enditer;
441 ENCODEITERB(0);
442 ENCODEITERB(1);
443 ENCODEITERB(2);
444 ENCODEITERB(3);
445 ENCODEITERB(4);
446 ENCODEITERB(5);
447 ENCODEITERB(6);
448 ENCODEITERB(7);
449 enditer:
450 numbit += 8;
451 while (numbit >= 8) {
452 *wp++ = bitbuf;
453 bitbuf >>= 8;
454 numbit -= 8;
455 }
456 }
457 bitbuf |= 0x7e7e << numbit;
458 numbit += 16;
459 while (numbit >= 8) {
460 *wp++ = bitbuf;
461 bitbuf >>= 8;
462 numbit -= 8;
463 }
464 bc->hdlctx.bufptr = bc->hdlctx.buf;
465 bc->hdlctx.bufcnt = wp - bc->hdlctx.buf;
466 dev_kfree_skb(skb);
467 bc->stats.tx_packets++;
468}
469
470/* ---------------------------------------------------------------------- */
471
472static unsigned short random_seed;
473
474static inline unsigned short random_num(void)
475{
476 random_seed = 28629 * random_seed + 157;
477 return random_seed;
478}
479
480/* ---------------------------------------------------------------------- */
481
482static int transmit(struct baycom_state *bc, int cnt, unsigned char stat)
483{
484 struct parport *pp = bc->pdev->port;
485 unsigned char tmp[128];
486 int i, j;
487
488 if (bc->hdlctx.state == tx_tail && !(stat & EPP_PTTBIT))
489 bc->hdlctx.state = tx_idle;
490 if (bc->hdlctx.state == tx_idle && bc->hdlctx.calibrate <= 0) {
491 if (bc->hdlctx.bufcnt <= 0)
492 encode_hdlc(bc);
493 if (bc->hdlctx.bufcnt <= 0)
494 return 0;
495 if (!bc->ch_params.fulldup) {
496 if (!(stat & EPP_DCDBIT)) {
497 bc->hdlctx.slotcnt = bc->ch_params.slottime;
498 return 0;
499 }
500 if ((--bc->hdlctx.slotcnt) > 0)
501 return 0;
502 bc->hdlctx.slotcnt = bc->ch_params.slottime;
503 if ((random_num() % 256) > bc->ch_params.ppersist)
504 return 0;
505 }
506 }
507 if (bc->hdlctx.state == tx_idle && bc->hdlctx.bufcnt > 0) {
508 bc->hdlctx.state = tx_keyup;
509 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_delay);
510 bc->ptt_keyed++;
511 }
512 while (cnt > 0) {
513 switch (bc->hdlctx.state) {
514 case tx_keyup:
515 i = min_t(int, cnt, bc->hdlctx.flags);
516 cnt -= i;
517 bc->hdlctx.flags -= i;
518 if (bc->hdlctx.flags <= 0)
519 bc->hdlctx.state = tx_data;
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 case tx_data:
530 if (bc->hdlctx.bufcnt <= 0) {
531 encode_hdlc(bc);
532 if (bc->hdlctx.bufcnt <= 0) {
533 bc->hdlctx.state = tx_tail;
534 bc->hdlctx.flags = tenms_to_flags(bc, bc->ch_params.tx_tail);
535 break;
536 }
537 }
538 i = min_t(int, cnt, bc->hdlctx.bufcnt);
539 bc->hdlctx.bufcnt -= i;
540 cnt -= i;
541 if (i != pp->ops->epp_write_data(pp, bc->hdlctx.bufptr, i, 0))
542 return -1;
543 bc->hdlctx.bufptr += i;
544 break;
545
546 case tx_tail:
547 encode_hdlc(bc);
548 if (bc->hdlctx.bufcnt > 0) {
549 bc->hdlctx.state = tx_data;
550 break;
551 }
552 i = min_t(int, cnt, bc->hdlctx.flags);
553 if (i) {
554 cnt -= i;
555 bc->hdlctx.flags -= i;
556 memset(tmp, 0x7e, sizeof(tmp));
557 while (i > 0) {
558 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
559 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
560 return -1;
561 i -= j;
562 }
563 break;
564 }
565
566 default: /* fall through */
567 if (bc->hdlctx.calibrate <= 0)
568 return 0;
569 i = min_t(int, cnt, bc->hdlctx.calibrate);
570 cnt -= i;
571 bc->hdlctx.calibrate -= i;
572 memset(tmp, 0, sizeof(tmp));
573 while (i > 0) {
574 j = (i > sizeof(tmp)) ? sizeof(tmp) : i;
575 if (j != pp->ops->epp_write_data(pp, tmp, j, 0))
576 return -1;
577 i -= j;
578 }
579 break;
580 }
581 }
582 return 0;
583}
584
585/* ---------------------------------------------------------------------- */
586
587static void do_rxpacket(struct net_device *dev)
588{
589 struct baycom_state *bc = netdev_priv(dev);
590 struct sk_buff *skb;
591 unsigned char *cp;
592 unsigned pktlen;
593
594 if (bc->hdlcrx.bufcnt < 4)
595 return;
596 if (!check_crc_ccitt(bc->hdlcrx.buf, bc->hdlcrx.bufcnt))
597 return;
598 pktlen = bc->hdlcrx.bufcnt-2+1; /* KISS kludge */
599 if (!(skb = dev_alloc_skb(pktlen))) {
600 printk("%s: memory squeeze, dropping packet\n", dev->name);
601 bc->stats.rx_dropped++;
602 return;
603 }
604 skb->dev = dev;
605 cp = skb_put(skb, pktlen);
606 *cp++ = 0; /* KISS kludge */
607 memcpy(cp, bc->hdlcrx.buf, pktlen - 1);
608 skb->protocol = htons(ETH_P_AX25);
609 skb->mac.raw = skb->data;
610 netif_rx(skb);
611 dev->last_rx = jiffies;
612 bc->stats.rx_packets++;
613}
614
615#define DECODEITERA(j) \
616({ \
617 if (!(notbitstream & (0x0fc << j))) /* flag or abort */ \
618 goto flgabrt##j; \
619 if ((bitstream & (0x1f8 << j)) == (0xf8 << j)) /* stuffed bit */ \
620 goto stuff##j; \
621 enditer##j: ; \
622})
623
624#define DECODEITERB(j) \
625({ \
626 flgabrt##j: \
627 if (!(notbitstream & (0x1fc << j))) { /* abort received */ \
628 state = 0; \
629 goto enditer##j; \
630 } \
631 if ((bitstream & (0x1fe << j)) != (0x0fc << j)) /* flag received */ \
632 goto enditer##j; \
633 if (state) \
634 do_rxpacket(dev); \
635 bc->hdlcrx.bufcnt = 0; \
636 bc->hdlcrx.bufptr = bc->hdlcrx.buf; \
637 state = 1; \
638 numbits = 7-j; \
639 goto enditer##j; \
640 stuff##j: \
641 numbits--; \
642 bitbuf = (bitbuf & ((~0xff) << j)) | ((bitbuf & ~((~0xff) << j)) << 1); \
643 goto enditer##j; \
644})
645
646static int receive(struct net_device *dev, int cnt)
647{
648 struct baycom_state *bc = netdev_priv(dev);
649 struct parport *pp = bc->pdev->port;
650 unsigned int bitbuf, notbitstream, bitstream, numbits, state;
651 unsigned char tmp[128];
652 unsigned char *cp;
653 int cnt2, ret = 0;
654
655 numbits = bc->hdlcrx.numbits;
656 state = bc->hdlcrx.state;
657 bitstream = bc->hdlcrx.bitstream;
658 bitbuf = bc->hdlcrx.bitbuf;
659 while (cnt > 0) {
660 cnt2 = (cnt > sizeof(tmp)) ? sizeof(tmp) : cnt;
661 cnt -= cnt2;
662 if (cnt2 != pp->ops->epp_read_data(pp, tmp, cnt2, 0)) {
663 ret = -1;
664 break;
665 }
666 cp = tmp;
667 for (; cnt2 > 0; cnt2--, cp++) {
668 bitstream >>= 8;
669 bitstream |= (*cp) << 8;
670 bitbuf >>= 8;
671 bitbuf |= (*cp) << 8;
672 numbits += 8;
673 notbitstream = ~bitstream;
674 DECODEITERA(0);
675 DECODEITERA(1);
676 DECODEITERA(2);
677 DECODEITERA(3);
678 DECODEITERA(4);
679 DECODEITERA(5);
680 DECODEITERA(6);
681 DECODEITERA(7);
682 goto enddec;
683 DECODEITERB(0);
684 DECODEITERB(1);
685 DECODEITERB(2);
686 DECODEITERB(3);
687 DECODEITERB(4);
688 DECODEITERB(5);
689 DECODEITERB(6);
690 DECODEITERB(7);
691 enddec:
692 while (state && numbits >= 8) {
693 if (bc->hdlcrx.bufcnt >= TXBUFFER_SIZE) {
694 state = 0;
695 } else {
696 *(bc->hdlcrx.bufptr)++ = bitbuf >> (16-numbits);
697 bc->hdlcrx.bufcnt++;
698 numbits -= 8;
699 }
700 }
701 }
702 }
703 bc->hdlcrx.numbits = numbits;
704 bc->hdlcrx.state = state;
705 bc->hdlcrx.bitstream = bitstream;
706 bc->hdlcrx.bitbuf = bitbuf;
707 return ret;
708}
709
710/* --------------------------------------------------------------------- */
711
712#ifdef __i386__
713#include <asm/msr.h>
714#define GETTICK(x) \
715({ \
716 if (cpu_has_tsc) \
717 rdtscl(x); \
718})
719#else /* __i386__ */
720#define GETTICK(x)
721#endif /* __i386__ */
722
723static void epp_bh(struct net_device *dev)
724{
725 struct baycom_state *bc;
726 struct parport *pp;
727 unsigned char stat;
728 unsigned char tmp[2];
729 unsigned int time1 = 0, time2 = 0, time3 = 0;
730 int cnt, cnt2;
731
732 bc = netdev_priv(dev);
733 if (!bc->work_running)
734 return;
735 baycom_int_freq(bc);
736 pp = bc->pdev->port;
737 /* update status */
738 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
739 goto epptimeout;
740 bc->stat = stat;
741 bc->debug_vals.last_pllcorr = stat;
742 GETTICK(time1);
743 if (bc->modem == EPP_FPGAEXTSTATUS) {
744 /* get input count */
745 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|1;
746 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
747 goto epptimeout;
748 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
749 goto epptimeout;
750 cnt = tmp[0] | (tmp[1] << 8);
751 cnt &= 0x7fff;
752 /* get output count */
753 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE|2;
754 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
755 goto epptimeout;
756 if (pp->ops->epp_read_addr(pp, tmp, 2, 0) != 2)
757 goto epptimeout;
758 cnt2 = tmp[0] | (tmp[1] << 8);
759 cnt2 = 16384 - (cnt2 & 0x7fff);
760 /* return to normal */
761 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
762 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
763 goto epptimeout;
764 if (transmit(bc, cnt2, stat))
765 goto epptimeout;
766 GETTICK(time2);
767 if (receive(dev, cnt))
768 goto epptimeout;
769 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
770 goto epptimeout;
771 bc->stat = stat;
772 } else {
773 /* try to tx */
774 switch (stat & (EPP_NTAEF|EPP_NTHF)) {
775 case EPP_NTHF:
776 cnt = 2048 - 256;
777 break;
778
779 case EPP_NTAEF:
780 cnt = 2048 - 1793;
781 break;
782
783 case 0:
784 cnt = 0;
785 break;
786
787 default:
788 cnt = 2048 - 1025;
789 break;
790 }
791 if (transmit(bc, cnt, stat))
792 goto epptimeout;
793 GETTICK(time2);
794 /* do receiver */
795 while ((stat & (EPP_NRAEF|EPP_NRHF)) != EPP_NRHF) {
796 switch (stat & (EPP_NRAEF|EPP_NRHF)) {
797 case EPP_NRAEF:
798 cnt = 1025;
799 break;
800
801 case 0:
802 cnt = 1793;
803 break;
804
805 default:
806 cnt = 256;
807 break;
808 }
809 if (receive(dev, cnt))
810 goto epptimeout;
811 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
812 goto epptimeout;
813 }
814 cnt = 0;
815 if (bc->bitrate < 50000)
816 cnt = 256;
817 else if (bc->bitrate < 100000)
818 cnt = 128;
819 while (cnt > 0 && stat & EPP_NREF) {
820 if (receive(dev, 1))
821 goto epptimeout;
822 cnt--;
823 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
824 goto epptimeout;
825 }
826 }
827 GETTICK(time3);
828#ifdef BAYCOM_DEBUG
829 bc->debug_vals.mod_cycles = time2 - time1;
830 bc->debug_vals.demod_cycles = time3 - time2;
831#endif /* BAYCOM_DEBUG */
832 schedule_delayed_work(&bc->run_work, 1);
833 if (!bc->skb)
834 netif_wake_queue(dev);
835 return;
836 epptimeout:
837 printk(KERN_ERR "%s: EPP timeout!\n", bc_drvname);
838}
839
840/* ---------------------------------------------------------------------- */
841/*
842 * ===================== network driver interface =========================
843 */
844
845static int baycom_send_packet(struct sk_buff *skb, struct net_device *dev)
846{
847 struct baycom_state *bc = netdev_priv(dev);
848
849 if (skb->data[0] != 0) {
850 do_kiss_params(bc, skb->data, skb->len);
851 dev_kfree_skb(skb);
852 return 0;
853 }
854 if (bc->skb)
855 return -1;
856 /* strip KISS byte */
857 if (skb->len >= HDLCDRV_MAXFLEN+1 || skb->len < 3) {
858 dev_kfree_skb(skb);
859 return 0;
860 }
861 netif_stop_queue(dev);
862 bc->skb = skb;
863 return 0;
864}
865
866/* --------------------------------------------------------------------- */
867
868static int baycom_set_mac_address(struct net_device *dev, void *addr)
869{
870 struct sockaddr *sa = (struct sockaddr *)addr;
871
872 /* addr is an AX.25 shifted ASCII mac address */
873 memcpy(dev->dev_addr, sa->sa_data, dev->addr_len);
874 return 0;
875}
876
877/* --------------------------------------------------------------------- */
878
879static struct net_device_stats *baycom_get_stats(struct net_device *dev)
880{
881 struct baycom_state *bc = netdev_priv(dev);
882
883 /*
884 * Get the current statistics. This may be called with the
885 * card open or closed.
886 */
887 return &bc->stats;
888}
889
890/* --------------------------------------------------------------------- */
891
892static void epp_wakeup(void *handle)
893{
894 struct net_device *dev = (struct net_device *)handle;
895 struct baycom_state *bc = netdev_priv(dev);
896
897 printk(KERN_DEBUG "baycom_epp: %s: why am I being woken up?\n", dev->name);
898 if (!parport_claim(bc->pdev))
899 printk(KERN_DEBUG "baycom_epp: %s: I'm broken.\n", dev->name);
900}
901
902/* --------------------------------------------------------------------- */
903
904/*
905 * Open/initialize the board. This is called (in the current kernel)
906 * sometime after booting when the 'ifconfig' program is run.
907 *
908 * This routine should set everything up anew at each open, even
909 * registers that "should" only need to be set once at boot, so that
910 * there is non-reboot way to recover if something goes wrong.
911 */
912
913static int epp_open(struct net_device *dev)
914{
915 struct baycom_state *bc = netdev_priv(dev);
916 struct parport *pp = parport_find_base(dev->base_addr);
917 unsigned int i, j;
918 unsigned char tmp[128];
919 unsigned char stat;
920 unsigned long tstart;
921
922 if (!pp) {
923 printk(KERN_ERR "%s: parport at 0x%lx unknown\n", bc_drvname, dev->base_addr);
924 return -ENXIO;
925 }
926#if 0
927 if (pp->irq < 0) {
928 printk(KERN_ERR "%s: parport at 0x%lx has no irq\n", bc_drvname, pp->base);
929 parport_put_port(pp);
930 return -ENXIO;
931 }
932#endif
933 if ((~pp->modes) & (PARPORT_MODE_TRISTATE | PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT)) {
934 printk(KERN_ERR "%s: parport at 0x%lx cannot be used\n",
935 bc_drvname, pp->base);
936 parport_put_port(pp);
937 return -EIO;
938 }
939 memset(&bc->modem, 0, sizeof(bc->modem));
940 bc->pdev = parport_register_device(pp, dev->name, NULL, epp_wakeup,
941 epp_interrupt, PARPORT_DEV_EXCL, dev);
942 parport_put_port(pp);
943 if (!bc->pdev) {
944 printk(KERN_ERR "%s: cannot register parport at 0x%lx\n", bc_drvname, pp->base);
945 return -ENXIO;
946 }
947 if (parport_claim(bc->pdev)) {
948 printk(KERN_ERR "%s: parport at 0x%lx busy\n", bc_drvname, pp->base);
949 parport_unregister_device(bc->pdev);
950 return -EBUSY;
951 }
952 dev->irq = /*pp->irq*/ 0;
953 INIT_WORK(&bc->run_work, (void *)(void *)epp_bh, dev);
954 bc->work_running = 1;
955 bc->modem = EPP_CONVENTIONAL;
956 if (eppconfig(bc))
957 printk(KERN_INFO "%s: no FPGA detected, assuming conventional EPP modem\n", bc_drvname);
958 else
959 bc->modem = /*EPP_FPGA*/ EPP_FPGAEXTSTATUS;
960 parport_write_control(pp, LPTCTRL_PROGRAM); /* prepare EPP mode; we aren't using interrupts */
961 /* reset the modem */
962 tmp[0] = 0;
963 tmp[1] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE;
964 if (pp->ops->epp_write_addr(pp, tmp, 2, 0) != 2)
965 goto epptimeout;
966 /* autoprobe baud rate */
967 tstart = jiffies;
968 i = 0;
969 while ((signed)(jiffies-tstart-HZ/3) < 0) {
970 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
971 goto epptimeout;
972 if ((stat & (EPP_NRAEF|EPP_NRHF)) == EPP_NRHF) {
973 schedule();
974 continue;
975 }
976 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
977 goto epptimeout;
978 if (pp->ops->epp_read_data(pp, tmp, 128, 0) != 128)
979 goto epptimeout;
980 i += 256;
981 }
982 for (j = 0; j < 256; j++) {
983 if (pp->ops->epp_read_addr(pp, &stat, 1, 0) != 1)
984 goto epptimeout;
985 if (!(stat & EPP_NREF))
986 break;
987 if (pp->ops->epp_read_data(pp, tmp, 1, 0) != 1)
988 goto epptimeout;
989 i++;
990 }
991 tstart = jiffies - tstart;
992 bc->bitrate = i * (8 * HZ) / tstart;
993 j = 1;
994 i = bc->bitrate >> 3;
995 while (j < 7 && i > 150) {
996 j++;
997 i >>= 1;
998 }
999 printk(KERN_INFO "%s: autoprobed bitrate: %d int divider: %d int rate: %d\n",
1000 bc_drvname, bc->bitrate, j, bc->bitrate >> (j+2));
1001 tmp[0] = EPP_TX_FIFO_ENABLE|EPP_RX_FIFO_ENABLE|EPP_MODEM_ENABLE/*|j*/;
1002 if (pp->ops->epp_write_addr(pp, tmp, 1, 0) != 1)
1003 goto epptimeout;
1004 /*
1005 * initialise hdlc variables
1006 */
1007 bc->hdlcrx.state = 0;
1008 bc->hdlcrx.numbits = 0;
1009 bc->hdlctx.state = tx_idle;
1010 bc->hdlctx.bufcnt = 0;
1011 bc->hdlctx.slotcnt = bc->ch_params.slottime;
1012 bc->hdlctx.calibrate = 0;
1013 /* start the bottom half stuff */
1014 schedule_delayed_work(&bc->run_work, 1);
1015 netif_start_queue(dev);
1016 return 0;
1017
1018 epptimeout:
1019 printk(KERN_ERR "%s: epp timeout during bitrate probe\n", bc_drvname);
1020 parport_write_control(pp, 0); /* reset the adapter */
1021 parport_release(bc->pdev);
1022 parport_unregister_device(bc->pdev);
1023 return -EIO;
1024}
1025
1026/* --------------------------------------------------------------------- */
1027
1028static int epp_close(struct net_device *dev)
1029{
1030 struct baycom_state *bc = netdev_priv(dev);
1031 struct parport *pp = bc->pdev->port;
1032 unsigned char tmp[1];
1033
1034 bc->work_running = 0;
1035 flush_scheduled_work();
1036 bc->stat = EPP_DCDBIT;
1037 tmp[0] = 0;
1038 pp->ops->epp_write_addr(pp, tmp, 1, 0);
1039 parport_write_control(pp, 0); /* reset the adapter */
1040 parport_release(bc->pdev);
1041 parport_unregister_device(bc->pdev);
1042 if (bc->skb)
1043 dev_kfree_skb(bc->skb);
1044 bc->skb = NULL;
1045 printk(KERN_INFO "%s: close epp at iobase 0x%lx irq %u\n",
1046 bc_drvname, dev->base_addr, dev->irq);
1047 return 0;
1048}
1049
1050/* --------------------------------------------------------------------- */
1051
1052static int baycom_setmode(struct baycom_state *bc, const char *modestr)
1053{
1054 const char *cp;
1055
1056 if (strstr(modestr,"intclk"))
1057 bc->cfg.intclk = 1;
1058 if (strstr(modestr,"extclk"))
1059 bc->cfg.intclk = 0;
1060 if (strstr(modestr,"intmodem"))
1061 bc->cfg.extmodem = 0;
1062 if (strstr(modestr,"extmodem"))
1063 bc->cfg.extmodem = 1;
1064 if (strstr(modestr,"noloopback"))
1065 bc->cfg.loopback = 0;
1066 if (strstr(modestr,"loopback"))
1067 bc->cfg.loopback = 1;
1068 if ((cp = strstr(modestr,"fclk="))) {
1069 bc->cfg.fclk = simple_strtoul(cp+5, NULL, 0);
1070 if (bc->cfg.fclk < 1000000)
1071 bc->cfg.fclk = 1000000;
1072 if (bc->cfg.fclk > 25000000)
1073 bc->cfg.fclk = 25000000;
1074 }
1075 if ((cp = strstr(modestr,"bps="))) {
1076 bc->cfg.bps = simple_strtoul(cp+4, NULL, 0);
1077 if (bc->cfg.bps < 1000)
1078 bc->cfg.bps = 1000;
1079 if (bc->cfg.bps > 1500000)
1080 bc->cfg.bps = 1500000;
1081 }
1082 return 0;
1083}
1084
1085/* --------------------------------------------------------------------- */
1086
1087static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1088{
1089 struct baycom_state *bc = netdev_priv(dev);
1090 struct hdlcdrv_ioctl hi;
1091
1092 if (cmd != SIOCDEVPRIVATE)
1093 return -ENOIOCTLCMD;
1094
1095 if (copy_from_user(&hi, ifr->ifr_data, sizeof(hi)))
1096 return -EFAULT;
1097 switch (hi.cmd) {
1098 default:
1099 return -ENOIOCTLCMD;
1100
1101 case HDLCDRVCTL_GETCHANNELPAR:
1102 hi.data.cp.tx_delay = bc->ch_params.tx_delay;
1103 hi.data.cp.tx_tail = bc->ch_params.tx_tail;
1104 hi.data.cp.slottime = bc->ch_params.slottime;
1105 hi.data.cp.ppersist = bc->ch_params.ppersist;
1106 hi.data.cp.fulldup = bc->ch_params.fulldup;
1107 break;
1108
1109 case HDLCDRVCTL_SETCHANNELPAR:
1110 if (!capable(CAP_NET_ADMIN))
1111 return -EACCES;
1112 bc->ch_params.tx_delay = hi.data.cp.tx_delay;
1113 bc->ch_params.tx_tail = hi.data.cp.tx_tail;
1114 bc->ch_params.slottime = hi.data.cp.slottime;
1115 bc->ch_params.ppersist = hi.data.cp.ppersist;
1116 bc->ch_params.fulldup = hi.data.cp.fulldup;
1117 bc->hdlctx.slotcnt = 1;
1118 return 0;
1119
1120 case HDLCDRVCTL_GETMODEMPAR:
1121 hi.data.mp.iobase = dev->base_addr;
1122 hi.data.mp.irq = dev->irq;
1123 hi.data.mp.dma = dev->dma;
1124 hi.data.mp.dma2 = 0;
1125 hi.data.mp.seriobase = 0;
1126 hi.data.mp.pariobase = 0;
1127 hi.data.mp.midiiobase = 0;
1128 break;
1129
1130 case HDLCDRVCTL_SETMODEMPAR:
1131 if ((!capable(CAP_SYS_RAWIO)) || netif_running(dev))
1132 return -EACCES;
1133 dev->base_addr = hi.data.mp.iobase;
1134 dev->irq = /*hi.data.mp.irq*/0;
1135 dev->dma = /*hi.data.mp.dma*/0;
1136 return 0;
1137
1138 case HDLCDRVCTL_GETSTAT:
1139 hi.data.cs.ptt = !!(bc->stat & EPP_PTTBIT);
1140 hi.data.cs.dcd = !(bc->stat & EPP_DCDBIT);
1141 hi.data.cs.ptt_keyed = bc->ptt_keyed;
1142 hi.data.cs.tx_packets = bc->stats.tx_packets;
1143 hi.data.cs.tx_errors = bc->stats.tx_errors;
1144 hi.data.cs.rx_packets = bc->stats.rx_packets;
1145 hi.data.cs.rx_errors = bc->stats.rx_errors;
1146 break;
1147
1148 case HDLCDRVCTL_OLDGETSTAT:
1149 hi.data.ocs.ptt = !!(bc->stat & EPP_PTTBIT);
1150 hi.data.ocs.dcd = !(bc->stat & EPP_DCDBIT);
1151 hi.data.ocs.ptt_keyed = bc->ptt_keyed;
1152 break;
1153
1154 case HDLCDRVCTL_CALIBRATE:
1155 if (!capable(CAP_SYS_RAWIO))
1156 return -EACCES;
1157 bc->hdlctx.calibrate = hi.data.calibrate * bc->bitrate / 8;
1158 return 0;
1159
1160 case HDLCDRVCTL_DRIVERNAME:
1161 strncpy(hi.data.drivername, "baycom_epp", sizeof(hi.data.drivername));
1162 break;
1163
1164 case HDLCDRVCTL_GETMODE:
1165 sprintf(hi.data.modename, "%sclk,%smodem,fclk=%d,bps=%d%s",
1166 bc->cfg.intclk ? "int" : "ext",
1167 bc->cfg.extmodem ? "ext" : "int", bc->cfg.fclk, bc->cfg.bps,
1168 bc->cfg.loopback ? ",loopback" : "");
1169 break;
1170
1171 case HDLCDRVCTL_SETMODE:
1172 if (!capable(CAP_NET_ADMIN) || netif_running(dev))
1173 return -EACCES;
1174 hi.data.modename[sizeof(hi.data.modename)-1] = '\0';
1175 return baycom_setmode(bc, hi.data.modename);
1176
1177 case HDLCDRVCTL_MODELIST:
1178 strncpy(hi.data.modename, "intclk,extclk,intmodem,extmodem,divider=x",
1179 sizeof(hi.data.modename));
1180 break;
1181
1182 case HDLCDRVCTL_MODEMPARMASK:
1183 return HDLCDRV_PARMASK_IOBASE;
1184
1185 }
1186 if (copy_to_user(ifr->ifr_data, &hi, sizeof(hi)))
1187 return -EFAULT;
1188 return 0;
1189}
1190
1191/* --------------------------------------------------------------------- */
1192
1193/*
1194 * Check for a network adaptor of this type, and return '0' if one exists.
1195 * If dev->base_addr == 0, probe all likely locations.
1196 * If dev->base_addr == 1, always return failure.
1197 * If dev->base_addr == 2, allocate space for the device and return success
1198 * (detachable devices only).
1199 */
1200static void baycom_probe(struct net_device *dev)
1201{
1202 static char ax25_bcast[AX25_ADDR_LEN] = {
1203 'Q' << 1, 'S' << 1, 'T' << 1, ' ' << 1, ' ' << 1, ' ' << 1, '0' << 1
1204 };
1205 static char ax25_nocall[AX25_ADDR_LEN] = {
1206 'L' << 1, 'I' << 1, 'N' << 1, 'U' << 1, 'X' << 1, ' ' << 1, '1' << 1
1207 };
1208 const struct hdlcdrv_channel_params dflt_ch_params = {
1209 20, 2, 10, 40, 0
1210 };
1211 struct baycom_state *bc;
1212
1213 /*
1214 * not a real probe! only initialize data structures
1215 */
1216 bc = netdev_priv(dev);
1217 /*
1218 * initialize the baycom_state struct
1219 */
1220 bc->ch_params = dflt_ch_params;
1221 bc->ptt_keyed = 0;
1222
1223 /*
1224 * initialize the device struct
1225 */
1226 dev->open = epp_open;
1227 dev->stop = epp_close;
1228 dev->do_ioctl = baycom_ioctl;
1229 dev->hard_start_xmit = baycom_send_packet;
1230 dev->get_stats = baycom_get_stats;
1231
1232 /* Fill in the fields of the device structure */
1233 bc->skb = NULL;
1234
1235#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
1236 dev->hard_header = ax25_encapsulate;
1237 dev->rebuild_header = ax25_rebuild_header;
1238#else /* CONFIG_AX25 || CONFIG_AX25_MODULE */
1239 dev->hard_header = NULL;
1240 dev->rebuild_header = NULL;
1241#endif /* CONFIG_AX25 || CONFIG_AX25_MODULE */
1242 dev->set_mac_address = baycom_set_mac_address;
1243
1244 dev->type = ARPHRD_AX25; /* AF_AX25 device */
1245 dev->hard_header_len = AX25_MAX_HEADER_LEN + AX25_BPQ_HEADER_LEN;
1246 dev->mtu = AX25_DEF_PACLEN; /* eth_mtu is the default */
1247 dev->addr_len = AX25_ADDR_LEN; /* sizeof an ax.25 address */
1248 memcpy(dev->broadcast, ax25_bcast, AX25_ADDR_LEN);
1249 memcpy(dev->dev_addr, ax25_nocall, AX25_ADDR_LEN);
1250 dev->tx_queue_len = 16;
1251
1252 /* New style flags */
1253 dev->flags = 0;
1254}
1255
1256/* --------------------------------------------------------------------- */
1257
1258/*
1259 * command line settable parameters
1260 */
1261static const char *mode[NR_PORTS] = { "", };
1262static int iobase[NR_PORTS] = { 0x378, };
1263
1264module_param_array(mode, charp, NULL, 0);
1265MODULE_PARM_DESC(mode, "baycom operating mode");
1266module_param_array(iobase, int, NULL, 0);
1267MODULE_PARM_DESC(iobase, "baycom io base address");
1268
1269MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu");
1270MODULE_DESCRIPTION("Baycom epp amateur radio modem driver");
1271MODULE_LICENSE("GPL");
1272
1273/* --------------------------------------------------------------------- */
1274
1275static void __init baycom_epp_dev_setup(struct net_device *dev)
1276{
1277 struct baycom_state *bc = netdev_priv(dev);
1278
1279 /*
1280 * initialize part of the baycom_state struct
1281 */
1282 bc->magic = BAYCOM_MAGIC;
1283 bc->cfg.fclk = 19666600;
1284 bc->cfg.bps = 9600;
1285 /*
1286 * initialize part of the device struct
1287 */
1288 baycom_probe(dev);
1289}
1290
1291static int __init init_baycomepp(void)
1292{
1293 int i, found = 0;
1294 char set_hw = 1;
1295
1296 printk(bc_drvinfo);
1297 /*
1298 * register net devices
1299 */
1300 for (i = 0; i < NR_PORTS; i++) {
1301 struct net_device *dev;
1302
1303 dev = alloc_netdev(sizeof(struct baycom_state), "bce%d",
1304 baycom_epp_dev_setup);
1305
1306 if (!dev) {
1307 printk(KERN_WARNING "bce%d : out of memory\n", i);
1308 return found ? 0 : -ENOMEM;
1309 }
1310
1311 sprintf(dev->name, "bce%d", i);
1312 dev->base_addr = iobase[i];
1313
1314 if (!mode[i])
1315 set_hw = 0;
1316 if (!set_hw)
1317 iobase[i] = 0;
1318
1319 if (register_netdev(dev)) {
1320 printk(KERN_WARNING "%s: cannot register net device %s\n", bc_drvname, dev->name);
1321 free_netdev(dev);
1322 break;
1323 }
1324 if (set_hw && baycom_setmode(netdev_priv(dev), mode[i]))
1325 set_hw = 0;
1326 baycom_device[i] = dev;
1327 found++;
1328 }
1329
1330 return found ? 0 : -ENXIO;
1331}
1332
1333static void __exit cleanup_baycomepp(void)
1334{
1335 int i;
1336
1337 for(i = 0; i < NR_PORTS; i++) {
1338 struct net_device *dev = baycom_device[i];
1339
1340 if (dev) {
1341 struct baycom_state *bc = netdev_priv(dev);
1342 if (bc->magic == BAYCOM_MAGIC) {
1343 unregister_netdev(dev);
1344 free_netdev(dev);
1345 } else
1346 printk(paranoia_str, "cleanup_module");
1347 }
1348 }
1349}
1350
1351module_init(init_baycomepp);
1352module_exit(cleanup_baycomepp);
1353
1354/* --------------------------------------------------------------------- */
1355
1356#ifndef MODULE
1357
1358/*
1359 * format: baycom_epp=io,mode
1360 * mode: fpga config options
1361 */
1362
1363static int __init baycom_epp_setup(char *str)
1364{
1365 static unsigned __initdata nr_dev = 0;
1366 int ints[2];
1367
1368 if (nr_dev >= NR_PORTS)
1369 return 0;
1370 str = get_options(str, 2, ints);
1371 if (ints[0] < 1)
1372 return 0;
1373 mode[nr_dev] = str;
1374 iobase[nr_dev] = ints[1];
1375 nr_dev++;
1376 return 1;
1377}
1378
1379__setup("baycom_epp=", baycom_epp_setup);
1380
1381#endif /* MODULE */
1382/* --------------------------------------------------------------------- */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-18 17:23:16 -0500