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1da177e4 LT |
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 | /* --------------------------------------------------------------------- */ | |
1da177e4 LT |
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]; | |
0fd56f67 | 385 | int j; |
1da177e4 LT |
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; | |
0fd56f67 AB |
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 | } | |
1da177e4 LT |
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 | } | |
1da177e4 LT |
572 | cp = skb_put(skb, pktlen); |
573 | *cp++ = 0; /* KISS kludge */ | |
574 | memcpy(cp, bc->hdlcrx.buf, pktlen - 1); | |
56cb5156 | 575 | skb->protocol = ax25_type_trans(skb, dev); |
1da177e4 LT |
576 | netif_rx(skb); |
577 | dev->last_rx = jiffies; | |
578 | bc->stats.rx_packets++; | |
579 | } | |
580 | ||
1da177e4 LT |
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; | |
0fd56f67 | 589 | int j; |
1da177e4 LT |
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; | |
0fd56f67 AB |
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 | } | |
1da177e4 LT |
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 | /* --------------------------------------------------------------------- */ |