Commit | Line | Data |
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1da177e4 LT |
1 | /*****************************************************************************/ |
2 | ||
3 | /* | |
4 | * baycom_ser_hdx.c -- baycom ser12 halfduplex radio modem driver. | |
5 | * | |
6 | * Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | * | |
22 | * Please note that the GPL allows you to use the driver, NOT the radio. | |
23 | * In order to use the radio, you need a license from the communications | |
24 | * authority of your country. | |
25 | * | |
26 | * | |
27 | * Supported modems | |
28 | * | |
29 | * ser12: This is a very simple 1200 baud AFSK modem. The modem consists only | |
30 | * of a modulator/demodulator chip, usually a TI TCM3105. The computer | |
31 | * is responsible for regenerating the receiver bit clock, as well as | |
32 | * for handling the HDLC protocol. The modem connects to a serial port, | |
33 | * hence the name. Since the serial port is not used as an async serial | |
34 | * port, the kernel driver for serial ports cannot be used, and this | |
35 | * driver only supports standard serial hardware (8250, 16450, 16550A) | |
36 | * | |
37 | * | |
38 | * Command line options (insmod command line) | |
39 | * | |
40 | * mode ser12 hardware DCD | |
41 | * ser12* software DCD | |
42 | * ser12@ hardware/software DCD, i.e. no explicit DCD signal but hardware | |
43 | * mutes audio input to the modem | |
44 | * ser12+ hardware DCD, inverted signal at DCD pin | |
45 | * iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8 | |
46 | * irq interrupt line of the port; common values are 4,3 | |
47 | * | |
48 | * | |
49 | * History: | |
50 | * 0.1 26.06.1996 Adapted from baycom.c and made network driver interface | |
51 | * 18.10.1996 Changed to new user space access routines (copy_{to,from}_user) | |
52 | * 0.3 26.04.1997 init code/data tagged | |
53 | * 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints) | |
54 | * 0.5 11.11.1997 ser12/par96 split into separate files | |
55 | * 0.6 14.04.1998 cleanups | |
56 | * 0.7 03.08.1999 adapt to Linus' new __setup/__initcall | |
57 | * 0.8 10.08.1999 use module_init/module_exit | |
58 | * 0.9 12.02.2000 adapted to softnet driver interface | |
59 | * 0.10 03.07.2000 fix interface name handling | |
60 | */ | |
61 | ||
62 | /*****************************************************************************/ | |
63 | ||
d43c36dc | 64 | #include <linux/capability.h> |
1da177e4 LT |
65 | #include <linux/module.h> |
66 | #include <linux/ioport.h> | |
67 | #include <linux/string.h> | |
68 | #include <linux/init.h> | |
69 | #include <asm/uaccess.h> | |
70 | #include <asm/io.h> | |
71 | #include <linux/hdlcdrv.h> | |
72 | #include <linux/baycom.h> | |
cd8749b4 | 73 | #include <linux/jiffies.h> |
1da177e4 LT |
74 | |
75 | /* --------------------------------------------------------------------- */ | |
76 | ||
77 | #define BAYCOM_DEBUG | |
78 | ||
79 | /* --------------------------------------------------------------------- */ | |
80 | ||
81 | static const char bc_drvname[] = "baycom_ser_hdx"; | |
82 | static const char bc_drvinfo[] = KERN_INFO "baycom_ser_hdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n" | |
c1afba3c | 83 | "baycom_ser_hdx: version 0.10\n"; |
1da177e4 LT |
84 | |
85 | /* --------------------------------------------------------------------- */ | |
86 | ||
87 | #define NR_PORTS 4 | |
88 | ||
89 | static struct net_device *baycom_device[NR_PORTS]; | |
90 | ||
91 | /* --------------------------------------------------------------------- */ | |
92 | ||
93 | #define RBR(iobase) (iobase+0) | |
94 | #define THR(iobase) (iobase+0) | |
95 | #define IER(iobase) (iobase+1) | |
96 | #define IIR(iobase) (iobase+2) | |
97 | #define FCR(iobase) (iobase+2) | |
98 | #define LCR(iobase) (iobase+3) | |
99 | #define MCR(iobase) (iobase+4) | |
100 | #define LSR(iobase) (iobase+5) | |
101 | #define MSR(iobase) (iobase+6) | |
102 | #define SCR(iobase) (iobase+7) | |
103 | #define DLL(iobase) (iobase+0) | |
104 | #define DLM(iobase) (iobase+1) | |
105 | ||
106 | #define SER12_EXTENT 8 | |
107 | ||
108 | /* ---------------------------------------------------------------------- */ | |
109 | /* | |
110 | * Information that need to be kept for each board. | |
111 | */ | |
112 | ||
113 | struct baycom_state { | |
114 | struct hdlcdrv_state hdrv; | |
115 | ||
116 | int opt_dcd; | |
117 | ||
118 | struct modem_state { | |
119 | short arb_divider; | |
120 | unsigned char flags; | |
121 | unsigned int shreg; | |
122 | struct modem_state_ser12 { | |
123 | unsigned char tx_bit; | |
124 | int dcd_sum0, dcd_sum1, dcd_sum2; | |
125 | unsigned char last_sample; | |
126 | unsigned char last_rxbit; | |
127 | unsigned int dcd_shreg; | |
128 | unsigned int dcd_time; | |
129 | unsigned int bit_pll; | |
130 | unsigned char interm_sample; | |
131 | } ser12; | |
132 | } modem; | |
133 | ||
134 | #ifdef BAYCOM_DEBUG | |
135 | struct debug_vals { | |
136 | unsigned long last_jiffies; | |
137 | unsigned cur_intcnt; | |
138 | unsigned last_intcnt; | |
139 | int cur_pllcorr; | |
140 | int last_pllcorr; | |
141 | } debug_vals; | |
142 | #endif /* BAYCOM_DEBUG */ | |
143 | }; | |
144 | ||
145 | /* --------------------------------------------------------------------- */ | |
146 | ||
147 | static inline void baycom_int_freq(struct baycom_state *bc) | |
148 | { | |
149 | #ifdef BAYCOM_DEBUG | |
150 | unsigned long cur_jiffies = jiffies; | |
151 | /* | |
152 | * measure the interrupt frequency | |
153 | */ | |
154 | bc->debug_vals.cur_intcnt++; | |
cd8749b4 | 155 | if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { |
1da177e4 LT |
156 | bc->debug_vals.last_jiffies = cur_jiffies; |
157 | bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; | |
158 | bc->debug_vals.cur_intcnt = 0; | |
159 | bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; | |
160 | bc->debug_vals.cur_pllcorr = 0; | |
161 | } | |
162 | #endif /* BAYCOM_DEBUG */ | |
163 | } | |
164 | ||
165 | /* --------------------------------------------------------------------- */ | |
166 | /* | |
167 | * ===================== SER12 specific routines ========================= | |
168 | */ | |
169 | ||
170 | static inline void ser12_set_divisor(struct net_device *dev, | |
171 | unsigned char divisor) | |
172 | { | |
173 | outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */ | |
174 | outb(divisor, DLL(dev->base_addr)); | |
175 | outb(0, DLM(dev->base_addr)); | |
176 | outb(0x01, LCR(dev->base_addr)); /* word length = 6 */ | |
177 | /* | |
178 | * make sure the next interrupt is generated; | |
179 | * 0 must be used to power the modem; the modem draws its | |
180 | * power from the TxD line | |
181 | */ | |
182 | outb(0x00, THR(dev->base_addr)); | |
183 | /* | |
184 | * it is important not to set the divider while transmitting; | |
185 | * this reportedly makes some UARTs generating interrupts | |
186 | * in the hundredthousands per second region | |
187 | * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno) | |
188 | */ | |
189 | } | |
190 | ||
191 | /* --------------------------------------------------------------------- */ | |
192 | ||
193 | /* | |
194 | * must call the TX arbitrator every 10ms | |
195 | */ | |
196 | #define SER12_ARB_DIVIDER(bc) (bc->opt_dcd ? 24 : 36) | |
197 | ||
198 | #define SER12_DCD_INTERVAL(bc) (bc->opt_dcd ? 12 : 240) | |
199 | ||
200 | static inline void ser12_tx(struct net_device *dev, struct baycom_state *bc) | |
201 | { | |
202 | /* one interrupt per channel bit */ | |
203 | ser12_set_divisor(dev, 12); | |
204 | /* | |
205 | * first output the last bit (!) then call HDLC transmitter, | |
206 | * since this may take quite long | |
207 | */ | |
208 | outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr)); | |
209 | if (bc->modem.shreg <= 1) | |
210 | bc->modem.shreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv); | |
211 | bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ | |
212 | (bc->modem.shreg & 1)); | |
213 | bc->modem.shreg >>= 1; | |
214 | } | |
215 | ||
216 | /* --------------------------------------------------------------------- */ | |
217 | ||
218 | static inline void ser12_rx(struct net_device *dev, struct baycom_state *bc) | |
219 | { | |
220 | unsigned char cur_s; | |
221 | /* | |
222 | * do demodulator | |
223 | */ | |
224 | cur_s = inb(MSR(dev->base_addr)) & 0x10; /* the CTS line */ | |
225 | hdlcdrv_channelbit(&bc->hdrv, cur_s); | |
226 | bc->modem.ser12.dcd_shreg = (bc->modem.ser12.dcd_shreg << 1) | | |
227 | (cur_s != bc->modem.ser12.last_sample); | |
228 | bc->modem.ser12.last_sample = cur_s; | |
229 | if(bc->modem.ser12.dcd_shreg & 1) { | |
230 | if (!bc->opt_dcd) { | |
231 | unsigned int dcdspos, dcdsneg; | |
232 | ||
233 | dcdspos = dcdsneg = 0; | |
234 | dcdspos += ((bc->modem.ser12.dcd_shreg >> 1) & 1); | |
235 | if (!(bc->modem.ser12.dcd_shreg & 0x7ffffffe)) | |
236 | dcdspos += 2; | |
237 | dcdsneg += ((bc->modem.ser12.dcd_shreg >> 2) & 1); | |
238 | dcdsneg += ((bc->modem.ser12.dcd_shreg >> 3) & 1); | |
239 | dcdsneg += ((bc->modem.ser12.dcd_shreg >> 4) & 1); | |
240 | ||
241 | bc->modem.ser12.dcd_sum0 += 16*dcdspos - dcdsneg; | |
242 | } else | |
243 | bc->modem.ser12.dcd_sum0--; | |
244 | } | |
245 | if(!bc->modem.ser12.dcd_time) { | |
246 | hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 + | |
247 | bc->modem.ser12.dcd_sum1 + | |
248 | bc->modem.ser12.dcd_sum2) < 0); | |
249 | bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1; | |
250 | bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0; | |
251 | /* offset to ensure DCD off on silent input */ | |
252 | bc->modem.ser12.dcd_sum0 = 2; | |
253 | bc->modem.ser12.dcd_time = SER12_DCD_INTERVAL(bc); | |
254 | } | |
255 | bc->modem.ser12.dcd_time--; | |
256 | if (!bc->opt_dcd) { | |
257 | /* | |
258 | * PLL code for the improved software DCD algorithm | |
259 | */ | |
260 | if (bc->modem.ser12.interm_sample) { | |
261 | /* | |
262 | * intermediate sample; set timing correction to normal | |
263 | */ | |
264 | ser12_set_divisor(dev, 4); | |
265 | } else { | |
266 | /* | |
267 | * do PLL correction and call HDLC receiver | |
268 | */ | |
269 | switch (bc->modem.ser12.dcd_shreg & 7) { | |
270 | case 1: /* transition too late */ | |
271 | ser12_set_divisor(dev, 5); | |
272 | #ifdef BAYCOM_DEBUG | |
273 | bc->debug_vals.cur_pllcorr++; | |
274 | #endif /* BAYCOM_DEBUG */ | |
275 | break; | |
276 | case 4: /* transition too early */ | |
277 | ser12_set_divisor(dev, 3); | |
278 | #ifdef BAYCOM_DEBUG | |
279 | bc->debug_vals.cur_pllcorr--; | |
280 | #endif /* BAYCOM_DEBUG */ | |
281 | break; | |
282 | default: | |
283 | ser12_set_divisor(dev, 4); | |
284 | break; | |
285 | } | |
286 | bc->modem.shreg >>= 1; | |
287 | if (bc->modem.ser12.last_sample == | |
288 | bc->modem.ser12.last_rxbit) | |
289 | bc->modem.shreg |= 0x10000; | |
290 | bc->modem.ser12.last_rxbit = | |
291 | bc->modem.ser12.last_sample; | |
292 | } | |
293 | if (++bc->modem.ser12.interm_sample >= 3) | |
294 | bc->modem.ser12.interm_sample = 0; | |
295 | /* | |
296 | * DCD stuff | |
297 | */ | |
298 | if (bc->modem.ser12.dcd_shreg & 1) { | |
299 | unsigned int dcdspos, dcdsneg; | |
300 | ||
301 | dcdspos = dcdsneg = 0; | |
302 | dcdspos += ((bc->modem.ser12.dcd_shreg >> 1) & 1); | |
303 | dcdspos += (!(bc->modem.ser12.dcd_shreg & 0x7ffffffe)) | |
304 | << 1; | |
305 | dcdsneg += ((bc->modem.ser12.dcd_shreg >> 2) & 1); | |
306 | dcdsneg += ((bc->modem.ser12.dcd_shreg >> 3) & 1); | |
307 | dcdsneg += ((bc->modem.ser12.dcd_shreg >> 4) & 1); | |
308 | ||
309 | bc->modem.ser12.dcd_sum0 += 16*dcdspos - dcdsneg; | |
310 | } | |
311 | } else { | |
312 | /* | |
313 | * PLL algorithm for the hardware squelch DCD algorithm | |
314 | */ | |
315 | if (bc->modem.ser12.interm_sample) { | |
316 | /* | |
317 | * intermediate sample; set timing correction to normal | |
318 | */ | |
319 | ser12_set_divisor(dev, 6); | |
320 | } else { | |
321 | /* | |
322 | * do PLL correction and call HDLC receiver | |
323 | */ | |
324 | switch (bc->modem.ser12.dcd_shreg & 3) { | |
325 | case 1: /* transition too late */ | |
326 | ser12_set_divisor(dev, 7); | |
327 | #ifdef BAYCOM_DEBUG | |
328 | bc->debug_vals.cur_pllcorr++; | |
329 | #endif /* BAYCOM_DEBUG */ | |
330 | break; | |
331 | case 2: /* transition too early */ | |
332 | ser12_set_divisor(dev, 5); | |
333 | #ifdef BAYCOM_DEBUG | |
334 | bc->debug_vals.cur_pllcorr--; | |
335 | #endif /* BAYCOM_DEBUG */ | |
336 | break; | |
337 | default: | |
338 | ser12_set_divisor(dev, 6); | |
339 | break; | |
340 | } | |
341 | bc->modem.shreg >>= 1; | |
342 | if (bc->modem.ser12.last_sample == | |
343 | bc->modem.ser12.last_rxbit) | |
344 | bc->modem.shreg |= 0x10000; | |
345 | bc->modem.ser12.last_rxbit = | |
346 | bc->modem.ser12.last_sample; | |
347 | } | |
348 | bc->modem.ser12.interm_sample = !bc->modem.ser12.interm_sample; | |
349 | /* | |
350 | * DCD stuff | |
351 | */ | |
352 | bc->modem.ser12.dcd_sum0 -= (bc->modem.ser12.dcd_shreg & 1); | |
353 | } | |
354 | outb(0x0d, MCR(dev->base_addr)); /* transmitter off */ | |
355 | if (bc->modem.shreg & 1) { | |
356 | hdlcdrv_putbits(&bc->hdrv, bc->modem.shreg >> 1); | |
357 | bc->modem.shreg = 0x10000; | |
358 | } | |
359 | if(!bc->modem.ser12.dcd_time) { | |
360 | if (bc->opt_dcd & 1) | |
361 | hdlcdrv_setdcd(&bc->hdrv, !((inb(MSR(dev->base_addr)) ^ bc->opt_dcd) & 0x80)); | |
362 | else | |
363 | hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 + | |
364 | bc->modem.ser12.dcd_sum1 + | |
365 | bc->modem.ser12.dcd_sum2) < 0); | |
366 | bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1; | |
367 | bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0; | |
368 | /* offset to ensure DCD off on silent input */ | |
369 | bc->modem.ser12.dcd_sum0 = 2; | |
370 | bc->modem.ser12.dcd_time = SER12_DCD_INTERVAL(bc); | |
371 | } | |
372 | bc->modem.ser12.dcd_time--; | |
373 | } | |
374 | ||
375 | /* --------------------------------------------------------------------- */ | |
376 | ||
7d12e780 | 377 | static irqreturn_t ser12_interrupt(int irq, void *dev_id) |
1da177e4 LT |
378 | { |
379 | struct net_device *dev = (struct net_device *)dev_id; | |
380 | struct baycom_state *bc = netdev_priv(dev); | |
381 | unsigned char iir; | |
382 | ||
383 | if (!dev || !bc || bc->hdrv.magic != HDLCDRV_MAGIC) | |
384 | return IRQ_NONE; | |
385 | /* fast way out */ | |
386 | if ((iir = inb(IIR(dev->base_addr))) & 1) | |
387 | return IRQ_NONE; | |
388 | baycom_int_freq(bc); | |
389 | do { | |
390 | switch (iir & 6) { | |
391 | case 6: | |
392 | inb(LSR(dev->base_addr)); | |
393 | break; | |
394 | ||
395 | case 4: | |
396 | inb(RBR(dev->base_addr)); | |
397 | break; | |
398 | ||
399 | case 2: | |
400 | /* | |
401 | * check if transmitter active | |
402 | */ | |
403 | if (hdlcdrv_ptt(&bc->hdrv)) | |
404 | ser12_tx(dev, bc); | |
405 | else { | |
406 | ser12_rx(dev, bc); | |
407 | bc->modem.arb_divider--; | |
408 | } | |
409 | outb(0x00, THR(dev->base_addr)); | |
410 | break; | |
411 | ||
412 | default: | |
413 | inb(MSR(dev->base_addr)); | |
414 | break; | |
415 | } | |
416 | iir = inb(IIR(dev->base_addr)); | |
417 | } while (!(iir & 1)); | |
418 | if (bc->modem.arb_divider <= 0) { | |
419 | bc->modem.arb_divider = SER12_ARB_DIVIDER(bc); | |
420 | local_irq_enable(); | |
421 | hdlcdrv_arbitrate(dev, &bc->hdrv); | |
422 | } | |
423 | local_irq_enable(); | |
424 | hdlcdrv_transmitter(dev, &bc->hdrv); | |
425 | hdlcdrv_receiver(dev, &bc->hdrv); | |
426 | local_irq_disable(); | |
427 | return IRQ_HANDLED; | |
428 | } | |
429 | ||
430 | /* --------------------------------------------------------------------- */ | |
431 | ||
432 | enum uart { c_uart_unknown, c_uart_8250, | |
433 | c_uart_16450, c_uart_16550, c_uart_16550A}; | |
434 | static const char *uart_str[] = { | |
435 | "unknown", "8250", "16450", "16550", "16550A" | |
436 | }; | |
437 | ||
438 | static enum uart ser12_check_uart(unsigned int iobase) | |
439 | { | |
440 | unsigned char b1,b2,b3; | |
441 | enum uart u; | |
442 | enum uart uart_tab[] = | |
443 | { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A }; | |
444 | ||
445 | b1 = inb(MCR(iobase)); | |
446 | outb(b1 | 0x10, MCR(iobase)); /* loopback mode */ | |
447 | b2 = inb(MSR(iobase)); | |
448 | outb(0x1a, MCR(iobase)); | |
449 | b3 = inb(MSR(iobase)) & 0xf0; | |
450 | outb(b1, MCR(iobase)); /* restore old values */ | |
451 | outb(b2, MSR(iobase)); | |
452 | if (b3 != 0x90) | |
453 | return c_uart_unknown; | |
454 | inb(RBR(iobase)); | |
455 | inb(RBR(iobase)); | |
456 | outb(0x01, FCR(iobase)); /* enable FIFOs */ | |
457 | u = uart_tab[(inb(IIR(iobase)) >> 6) & 3]; | |
458 | if (u == c_uart_16450) { | |
459 | outb(0x5a, SCR(iobase)); | |
460 | b1 = inb(SCR(iobase)); | |
461 | outb(0xa5, SCR(iobase)); | |
462 | b2 = inb(SCR(iobase)); | |
463 | if ((b1 != 0x5a) || (b2 != 0xa5)) | |
464 | u = c_uart_8250; | |
465 | } | |
466 | return u; | |
467 | } | |
468 | ||
469 | /* --------------------------------------------------------------------- */ | |
470 | ||
471 | static int ser12_open(struct net_device *dev) | |
472 | { | |
473 | struct baycom_state *bc = netdev_priv(dev); | |
474 | enum uart u; | |
475 | ||
476 | if (!dev || !bc) | |
477 | return -ENXIO; | |
478 | if (!dev->base_addr || dev->base_addr > 0x1000-SER12_EXTENT || | |
479 | dev->irq < 2 || dev->irq > 15) | |
480 | return -ENXIO; | |
481 | if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser12")) | |
482 | return -EACCES; | |
483 | memset(&bc->modem, 0, sizeof(bc->modem)); | |
484 | bc->hdrv.par.bitrate = 1200; | |
485 | if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown) { | |
486 | release_region(dev->base_addr, SER12_EXTENT); | |
487 | return -EIO; | |
488 | } | |
489 | outb(0, FCR(dev->base_addr)); /* disable FIFOs */ | |
490 | outb(0x0d, MCR(dev->base_addr)); | |
491 | outb(0, IER(dev->base_addr)); | |
1fb9df5d | 492 | if (request_irq(dev->irq, ser12_interrupt, IRQF_DISABLED | IRQF_SHARED, |
1da177e4 LT |
493 | "baycom_ser12", dev)) { |
494 | release_region(dev->base_addr, SER12_EXTENT); | |
495 | return -EBUSY; | |
496 | } | |
497 | /* | |
498 | * enable transmitter empty interrupt | |
499 | */ | |
500 | outb(2, IER(dev->base_addr)); | |
501 | /* | |
502 | * set the SIO to 6 Bits/character and 19200 or 28800 baud, so that | |
503 | * we get exactly (hopefully) 2 or 3 interrupts per radio symbol, | |
504 | * depending on the usage of the software DCD routine | |
505 | */ | |
506 | ser12_set_divisor(dev, bc->opt_dcd ? 6 : 4); | |
507 | printk(KERN_INFO "%s: ser12 at iobase 0x%lx irq %u uart %s\n", | |
508 | bc_drvname, dev->base_addr, dev->irq, uart_str[u]); | |
509 | return 0; | |
510 | } | |
511 | ||
512 | /* --------------------------------------------------------------------- */ | |
513 | ||
514 | static int ser12_close(struct net_device *dev) | |
515 | { | |
516 | struct baycom_state *bc = netdev_priv(dev); | |
517 | ||
518 | if (!dev || !bc) | |
519 | return -EINVAL; | |
520 | /* | |
521 | * disable interrupts | |
522 | */ | |
523 | outb(0, IER(dev->base_addr)); | |
524 | outb(1, MCR(dev->base_addr)); | |
525 | free_irq(dev->irq, dev); | |
526 | release_region(dev->base_addr, SER12_EXTENT); | |
527 | printk(KERN_INFO "%s: close ser12 at iobase 0x%lx irq %u\n", | |
528 | bc_drvname, dev->base_addr, dev->irq); | |
529 | return 0; | |
530 | } | |
531 | ||
532 | /* --------------------------------------------------------------------- */ | |
533 | /* | |
534 | * ===================== hdlcdrv driver interface ========================= | |
535 | */ | |
536 | ||
537 | /* --------------------------------------------------------------------- */ | |
538 | ||
539 | static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, | |
540 | struct hdlcdrv_ioctl *hi, int cmd); | |
541 | ||
542 | /* --------------------------------------------------------------------- */ | |
543 | ||
544 | static struct hdlcdrv_ops ser12_ops = { | |
545 | .drvname = bc_drvname, | |
546 | .drvinfo = bc_drvinfo, | |
547 | .open = ser12_open, | |
548 | .close = ser12_close, | |
549 | .ioctl = baycom_ioctl, | |
550 | }; | |
551 | ||
552 | /* --------------------------------------------------------------------- */ | |
553 | ||
554 | static int baycom_setmode(struct baycom_state *bc, const char *modestr) | |
555 | { | |
556 | if (strchr(modestr, '*')) | |
557 | bc->opt_dcd = 0; | |
558 | else if (strchr(modestr, '+')) | |
559 | bc->opt_dcd = -1; | |
560 | else if (strchr(modestr, '@')) | |
561 | bc->opt_dcd = -2; | |
562 | else | |
563 | bc->opt_dcd = 1; | |
564 | return 0; | |
565 | } | |
566 | ||
567 | /* --------------------------------------------------------------------- */ | |
568 | ||
569 | static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, | |
570 | struct hdlcdrv_ioctl *hi, int cmd) | |
571 | { | |
572 | struct baycom_state *bc; | |
573 | struct baycom_ioctl bi; | |
574 | ||
575 | if (!dev) | |
576 | return -EINVAL; | |
577 | ||
578 | bc = netdev_priv(dev); | |
579 | BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC); | |
580 | ||
581 | if (cmd != SIOCDEVPRIVATE) | |
582 | return -ENOIOCTLCMD; | |
583 | switch (hi->cmd) { | |
584 | default: | |
585 | break; | |
586 | ||
587 | case HDLCDRVCTL_GETMODE: | |
588 | strcpy(hi->data.modename, "ser12"); | |
589 | if (bc->opt_dcd <= 0) | |
590 | strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : (bc->opt_dcd == -2) ? "@" : "+"); | |
591 | if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) | |
592 | return -EFAULT; | |
593 | return 0; | |
594 | ||
595 | case HDLCDRVCTL_SETMODE: | |
596 | if (netif_running(dev) || !capable(CAP_NET_ADMIN)) | |
597 | return -EACCES; | |
598 | hi->data.modename[sizeof(hi->data.modename)-1] = '\0'; | |
599 | return baycom_setmode(bc, hi->data.modename); | |
600 | ||
601 | case HDLCDRVCTL_MODELIST: | |
602 | strcpy(hi->data.modename, "ser12"); | |
603 | if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) | |
604 | return -EFAULT; | |
605 | return 0; | |
606 | ||
607 | case HDLCDRVCTL_MODEMPARMASK: | |
608 | return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ; | |
609 | ||
610 | } | |
611 | ||
612 | if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi))) | |
613 | return -EFAULT; | |
614 | switch (bi.cmd) { | |
615 | default: | |
616 | return -ENOIOCTLCMD; | |
617 | ||
618 | #ifdef BAYCOM_DEBUG | |
619 | case BAYCOMCTL_GETDEBUG: | |
620 | bi.data.dbg.debug1 = bc->hdrv.ptt_keyed; | |
621 | bi.data.dbg.debug2 = bc->debug_vals.last_intcnt; | |
622 | bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr; | |
623 | break; | |
624 | #endif /* BAYCOM_DEBUG */ | |
625 | ||
626 | } | |
627 | if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi))) | |
628 | return -EFAULT; | |
629 | return 0; | |
630 | ||
631 | } | |
632 | ||
633 | /* --------------------------------------------------------------------- */ | |
634 | ||
635 | /* | |
636 | * command line settable parameters | |
637 | */ | |
638 | static char *mode[NR_PORTS] = { "ser12*", }; | |
639 | static int iobase[NR_PORTS] = { 0x3f8, }; | |
640 | static int irq[NR_PORTS] = { 4, }; | |
641 | ||
642 | module_param_array(mode, charp, NULL, 0); | |
643 | MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD"); | |
644 | module_param_array(iobase, int, NULL, 0); | |
645 | MODULE_PARM_DESC(iobase, "baycom io base address"); | |
646 | module_param_array(irq, int, NULL, 0); | |
647 | MODULE_PARM_DESC(irq, "baycom irq number"); | |
648 | ||
649 | MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); | |
650 | MODULE_DESCRIPTION("Baycom ser12 half duplex amateur radio modem driver"); | |
651 | MODULE_LICENSE("GPL"); | |
652 | ||
653 | /* --------------------------------------------------------------------- */ | |
654 | ||
655 | static int __init init_baycomserhdx(void) | |
656 | { | |
657 | int i, found = 0; | |
658 | char set_hw = 1; | |
659 | ||
660 | printk(bc_drvinfo); | |
661 | /* | |
662 | * register net devices | |
663 | */ | |
664 | for (i = 0; i < NR_PORTS; i++) { | |
665 | struct net_device *dev; | |
666 | struct baycom_state *bc; | |
667 | char ifname[IFNAMSIZ]; | |
668 | ||
669 | sprintf(ifname, "bcsh%d", i); | |
670 | ||
671 | if (!mode[i]) | |
672 | set_hw = 0; | |
673 | if (!set_hw) | |
674 | iobase[i] = irq[i] = 0; | |
675 | ||
676 | dev = hdlcdrv_register(&ser12_ops, | |
677 | sizeof(struct baycom_state), | |
678 | ifname, iobase[i], irq[i], 0); | |
679 | if (IS_ERR(dev)) | |
680 | break; | |
681 | ||
682 | bc = netdev_priv(dev); | |
683 | if (set_hw && baycom_setmode(bc, mode[i])) | |
684 | set_hw = 0; | |
685 | found++; | |
686 | baycom_device[i] = dev; | |
687 | } | |
688 | ||
689 | if (!found) | |
690 | return -ENXIO; | |
691 | return 0; | |
692 | } | |
693 | ||
694 | static void __exit cleanup_baycomserhdx(void) | |
695 | { | |
696 | int i; | |
697 | ||
698 | for(i = 0; i < NR_PORTS; i++) { | |
699 | struct net_device *dev = baycom_device[i]; | |
700 | ||
701 | if (dev) | |
702 | hdlcdrv_unregister(dev); | |
703 | } | |
704 | } | |
705 | ||
706 | module_init(init_baycomserhdx); | |
707 | module_exit(cleanup_baycomserhdx); | |
708 | ||
709 | /* --------------------------------------------------------------------- */ | |
710 | ||
711 | #ifndef MODULE | |
712 | ||
713 | /* | |
714 | * format: baycom_ser_hdx=io,irq,mode | |
715 | * mode: ser12 hardware DCD | |
716 | * ser12* software DCD | |
717 | * ser12@ hardware/software DCD, i.e. no explicit DCD signal but hardware | |
718 | * mutes audio input to the modem | |
719 | * ser12+ hardware DCD, inverted signal at DCD pin | |
720 | */ | |
721 | ||
722 | static int __init baycom_ser_hdx_setup(char *str) | |
723 | { | |
724 | static unsigned nr_dev; | |
725 | int ints[3]; | |
726 | ||
727 | if (nr_dev >= NR_PORTS) | |
728 | return 0; | |
729 | str = get_options(str, 3, ints); | |
730 | if (ints[0] < 2) | |
731 | return 0; | |
732 | mode[nr_dev] = str; | |
733 | iobase[nr_dev] = ints[1]; | |
734 | irq[nr_dev] = ints[2]; | |
735 | nr_dev++; | |
736 | return 1; | |
737 | } | |
738 | ||
739 | __setup("baycom_ser_hdx=", baycom_ser_hdx_setup); | |
740 | ||
741 | #endif /* MODULE */ | |
742 | /* --------------------------------------------------------------------- */ |