Commit | Line | Data |
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1da177e4 LT |
1 | /*****************************************************************************/ |
2 | ||
3 | /* | |
4 | * baycom_ser_fdx.c -- baycom ser12 fullduplex 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 | * This modem usually draws its supply current out of the otherwise unused | |
38 | * TXD pin of the serial port. Thus a contignuous stream of 0x00-bytes | |
39 | * is transmitted to achieve a positive supply voltage. | |
40 | * | |
41 | * hsk: This is a 4800 baud FSK modem, designed for TNC use. It works fine | |
42 | * in 'baycom-mode' :-) In contrast to the TCM3105 modem, power is | |
43 | * externally supplied. So there's no need to provide the 0x00-byte-stream | |
44 | * when receiving or idle, which drastically reduces interrupt load. | |
45 | * | |
46 | * Command line options (insmod command line) | |
47 | * | |
48 | * mode ser# hardware DCD | |
49 | * ser#* software DCD | |
50 | * ser#+ hardware DCD, inverted signal at DCD pin | |
51 | * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' | |
52 | * iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8 | |
53 | * baud baud rate (between 300 and 4800) | |
54 | * irq interrupt line of the port; common values are 4,3 | |
55 | * | |
56 | * | |
57 | * History: | |
58 | * 0.1 26.06.1996 Adapted from baycom.c and made network driver interface | |
59 | * 18.10.1996 Changed to new user space access routines (copy_{to,from}_user) | |
60 | * 0.3 26.04.1997 init code/data tagged | |
61 | * 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints) | |
62 | * 0.5 11.11.1997 ser12/par96 split into separate files | |
63 | * 0.6 24.01.1998 Thorsten Kranzkowski, dl8bcu and Thomas Sailer: | |
64 | * reduced interrupt load in transmit case | |
65 | * reworked receiver | |
66 | * 0.7 03.08.1999 adapt to Linus' new __setup/__initcall | |
67 | * 0.8 10.08.1999 use module_init/module_exit | |
68 | * 0.9 12.02.2000 adapted to softnet driver interface | |
69 | * 0.10 03.07.2000 fix interface name handling | |
70 | */ | |
71 | ||
72 | /*****************************************************************************/ | |
73 | ||
d43c36dc | 74 | #include <linux/capability.h> |
1da177e4 LT |
75 | #include <linux/module.h> |
76 | #include <linux/ioport.h> | |
77 | #include <linux/string.h> | |
78 | #include <linux/init.h> | |
1da177e4 LT |
79 | #include <linux/hdlcdrv.h> |
80 | #include <linux/baycom.h> | |
cd8749b4 | 81 | #include <linux/jiffies.h> |
1da177e4 | 82 | |
5efb764c AM |
83 | #include <asm/uaccess.h> |
84 | #include <asm/io.h> | |
85 | #include <asm/irq.h> | |
86 | ||
1da177e4 LT |
87 | /* --------------------------------------------------------------------- */ |
88 | ||
89 | #define BAYCOM_DEBUG | |
90 | ||
91 | /* --------------------------------------------------------------------- */ | |
92 | ||
93 | static const char bc_drvname[] = "baycom_ser_fdx"; | |
94 | static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n" | |
ad361c98 | 95 | "baycom_ser_fdx: version 0.10 compiled " __TIME__ " " __DATE__ "\n"; |
1da177e4 LT |
96 | |
97 | /* --------------------------------------------------------------------- */ | |
98 | ||
99 | #define NR_PORTS 4 | |
100 | ||
101 | static struct net_device *baycom_device[NR_PORTS]; | |
102 | ||
103 | /* --------------------------------------------------------------------- */ | |
104 | ||
105 | #define RBR(iobase) (iobase+0) | |
106 | #define THR(iobase) (iobase+0) | |
107 | #define IER(iobase) (iobase+1) | |
108 | #define IIR(iobase) (iobase+2) | |
109 | #define FCR(iobase) (iobase+2) | |
110 | #define LCR(iobase) (iobase+3) | |
111 | #define MCR(iobase) (iobase+4) | |
112 | #define LSR(iobase) (iobase+5) | |
113 | #define MSR(iobase) (iobase+6) | |
114 | #define SCR(iobase) (iobase+7) | |
115 | #define DLL(iobase) (iobase+0) | |
116 | #define DLM(iobase) (iobase+1) | |
117 | ||
118 | #define SER12_EXTENT 8 | |
119 | ||
120 | /* ---------------------------------------------------------------------- */ | |
121 | /* | |
122 | * Information that need to be kept for each board. | |
123 | */ | |
124 | ||
125 | struct baycom_state { | |
126 | struct hdlcdrv_state hdrv; | |
127 | ||
128 | unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout; | |
129 | int opt_dcd; | |
130 | ||
131 | struct modem_state { | |
132 | unsigned char flags; | |
133 | unsigned char ptt; | |
134 | unsigned int shreg; | |
135 | struct modem_state_ser12 { | |
136 | unsigned char tx_bit; | |
137 | unsigned char last_rxbit; | |
138 | int dcd_sum0, dcd_sum1, dcd_sum2; | |
139 | int dcd_time; | |
140 | unsigned int pll_time; | |
141 | unsigned int txshreg; | |
142 | } ser12; | |
143 | } modem; | |
144 | ||
145 | #ifdef BAYCOM_DEBUG | |
146 | struct debug_vals { | |
147 | unsigned long last_jiffies; | |
148 | unsigned cur_intcnt; | |
149 | unsigned last_intcnt; | |
150 | int cur_pllcorr; | |
151 | int last_pllcorr; | |
152 | } debug_vals; | |
153 | #endif /* BAYCOM_DEBUG */ | |
154 | }; | |
155 | ||
156 | /* --------------------------------------------------------------------- */ | |
157 | ||
158 | static inline void baycom_int_freq(struct baycom_state *bc) | |
159 | { | |
160 | #ifdef BAYCOM_DEBUG | |
161 | unsigned long cur_jiffies = jiffies; | |
162 | /* | |
163 | * measure the interrupt frequency | |
164 | */ | |
165 | bc->debug_vals.cur_intcnt++; | |
cd8749b4 | 166 | if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { |
1da177e4 LT |
167 | bc->debug_vals.last_jiffies = cur_jiffies; |
168 | bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; | |
169 | bc->debug_vals.cur_intcnt = 0; | |
170 | bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; | |
171 | bc->debug_vals.cur_pllcorr = 0; | |
172 | } | |
173 | #endif /* BAYCOM_DEBUG */ | |
174 | } | |
175 | ||
176 | /* --------------------------------------------------------------------- */ | |
177 | /* | |
178 | * ===================== SER12 specific routines ========================= | |
179 | */ | |
180 | ||
181 | /* --------------------------------------------------------------------- */ | |
182 | ||
183 | static inline void ser12_set_divisor(struct net_device *dev, | |
184 | unsigned int divisor) | |
185 | { | |
186 | outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */ | |
187 | outb(divisor, DLL(dev->base_addr)); | |
188 | outb(divisor >> 8, DLM(dev->base_addr)); | |
189 | outb(0x01, LCR(dev->base_addr)); /* word length = 6 */ | |
190 | /* | |
191 | * make sure the next interrupt is generated; | |
192 | * 0 must be used to power the modem; the modem draws its | |
193 | * power from the TxD line | |
194 | */ | |
195 | outb(0x00, THR(dev->base_addr)); | |
196 | /* | |
197 | * it is important not to set the divider while transmitting; | |
198 | * this reportedly makes some UARTs generating interrupts | |
199 | * in the hundredthousands per second region | |
200 | * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno) | |
201 | */ | |
202 | } | |
203 | ||
204 | /* --------------------------------------------------------------------- */ | |
205 | ||
206 | #if 0 | |
207 | static inline unsigned int hweight16(unsigned int w) | |
208 | __attribute__ ((unused)); | |
209 | static inline unsigned int hweight8(unsigned int w) | |
210 | __attribute__ ((unused)); | |
211 | ||
212 | static inline unsigned int hweight16(unsigned int w) | |
213 | { | |
214 | unsigned short res = (w & 0x5555) + ((w >> 1) & 0x5555); | |
215 | res = (res & 0x3333) + ((res >> 2) & 0x3333); | |
216 | res = (res & 0x0F0F) + ((res >> 4) & 0x0F0F); | |
217 | return (res & 0x00FF) + ((res >> 8) & 0x00FF); | |
218 | } | |
219 | ||
220 | static inline unsigned int hweight8(unsigned int w) | |
221 | { | |
222 | unsigned short res = (w & 0x55) + ((w >> 1) & 0x55); | |
223 | res = (res & 0x33) + ((res >> 2) & 0x33); | |
224 | return (res & 0x0F) + ((res >> 4) & 0x0F); | |
225 | } | |
226 | #endif | |
227 | ||
228 | /* --------------------------------------------------------------------- */ | |
229 | ||
230 | static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timeval *tv, unsigned char curs) | |
231 | { | |
232 | int timediff; | |
233 | int bdus8 = bc->baud_us >> 3; | |
234 | int bdus4 = bc->baud_us >> 2; | |
235 | int bdus2 = bc->baud_us >> 1; | |
236 | ||
237 | timediff = 1000000 + tv->tv_usec - bc->modem.ser12.pll_time; | |
238 | while (timediff >= 500000) | |
239 | timediff -= 1000000; | |
240 | while (timediff >= bdus2) { | |
241 | timediff -= bc->baud_us; | |
242 | bc->modem.ser12.pll_time += bc->baud_us; | |
243 | bc->modem.ser12.dcd_time--; | |
244 | /* first check if there is room to add a bit */ | |
245 | if (bc->modem.shreg & 1) { | |
246 | hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff); | |
247 | bc->modem.shreg = 0x10000; | |
248 | } | |
249 | /* add a one bit */ | |
250 | bc->modem.shreg >>= 1; | |
251 | } | |
252 | if (bc->modem.ser12.dcd_time <= 0) { | |
253 | if (!bc->opt_dcd) | |
254 | hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 + | |
255 | bc->modem.ser12.dcd_sum1 + | |
256 | bc->modem.ser12.dcd_sum2) < 0); | |
257 | bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1; | |
258 | bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0; | |
259 | bc->modem.ser12.dcd_sum0 = 2; /* slight bias */ | |
260 | bc->modem.ser12.dcd_time += 120; | |
261 | } | |
262 | if (bc->modem.ser12.last_rxbit != curs) { | |
263 | bc->modem.ser12.last_rxbit = curs; | |
264 | bc->modem.shreg |= 0x10000; | |
265 | /* adjust the PLL */ | |
266 | if (timediff > 0) | |
267 | bc->modem.ser12.pll_time += bdus8; | |
268 | else | |
269 | bc->modem.ser12.pll_time += 1000000 - bdus8; | |
270 | /* update DCD */ | |
271 | if (abs(timediff) > bdus4) | |
272 | bc->modem.ser12.dcd_sum0 += 4; | |
273 | else | |
274 | bc->modem.ser12.dcd_sum0--; | |
275 | #ifdef BAYCOM_DEBUG | |
276 | bc->debug_vals.cur_pllcorr = timediff; | |
277 | #endif /* BAYCOM_DEBUG */ | |
278 | } | |
279 | while (bc->modem.ser12.pll_time >= 1000000) | |
280 | bc->modem.ser12.pll_time -= 1000000; | |
281 | } | |
282 | ||
283 | /* --------------------------------------------------------------------- */ | |
284 | ||
7d12e780 | 285 | static irqreturn_t ser12_interrupt(int irq, void *dev_id) |
1da177e4 LT |
286 | { |
287 | struct net_device *dev = (struct net_device *)dev_id; | |
288 | struct baycom_state *bc = netdev_priv(dev); | |
289 | struct timeval tv; | |
290 | unsigned char iir, msr; | |
291 | unsigned int txcount = 0; | |
292 | ||
293 | if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC) | |
294 | return IRQ_NONE; | |
295 | /* fast way out for shared irq */ | |
296 | if ((iir = inb(IIR(dev->base_addr))) & 1) | |
297 | return IRQ_NONE; | |
298 | /* get current time */ | |
299 | do_gettimeofday(&tv); | |
300 | msr = inb(MSR(dev->base_addr)); | |
301 | /* delta DCD */ | |
302 | if ((msr & 8) && bc->opt_dcd) | |
303 | hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); | |
304 | do { | |
305 | switch (iir & 6) { | |
306 | case 6: | |
307 | inb(LSR(dev->base_addr)); | |
308 | break; | |
309 | ||
310 | case 4: | |
311 | inb(RBR(dev->base_addr)); | |
312 | break; | |
313 | ||
314 | case 2: | |
315 | /* | |
316 | * make sure the next interrupt is generated; | |
317 | * 0 must be used to power the modem; the modem draws its | |
318 | * power from the TxD line | |
319 | */ | |
320 | outb(0x00, THR(dev->base_addr)); | |
321 | baycom_int_freq(bc); | |
322 | txcount++; | |
323 | /* | |
324 | * first output the last bit (!) then call HDLC transmitter, | |
325 | * since this may take quite long | |
326 | */ | |
327 | if (bc->modem.ptt) | |
328 | outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr)); | |
329 | else | |
330 | outb(0x0d, MCR(dev->base_addr)); /* transmitter off */ | |
331 | break; | |
332 | ||
333 | default: | |
334 | msr = inb(MSR(dev->base_addr)); | |
335 | /* delta DCD */ | |
336 | if ((msr & 8) && bc->opt_dcd) | |
337 | hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); | |
338 | break; | |
339 | } | |
340 | iir = inb(IIR(dev->base_addr)); | |
341 | } while (!(iir & 1)); | |
342 | ser12_rx(dev, bc, &tv, msr & 0x10); /* CTS */ | |
343 | if (bc->modem.ptt && txcount) { | |
344 | if (bc->modem.ser12.txshreg <= 1) { | |
345 | bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv); | |
346 | if (!hdlcdrv_ptt(&bc->hdrv)) { | |
347 | ser12_set_divisor(dev, 115200/100/8); | |
348 | bc->modem.ptt = 0; | |
349 | goto end_transmit; | |
350 | } | |
351 | } | |
352 | bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1)); | |
353 | bc->modem.ser12.txshreg >>= 1; | |
354 | } | |
355 | end_transmit: | |
356 | local_irq_enable(); | |
357 | if (!bc->modem.ptt && txcount) { | |
358 | hdlcdrv_arbitrate(dev, &bc->hdrv); | |
359 | if (hdlcdrv_ptt(&bc->hdrv)) { | |
360 | ser12_set_divisor(dev, bc->baud_uartdiv); | |
361 | bc->modem.ser12.txshreg = 1; | |
362 | bc->modem.ptt = 1; | |
363 | } | |
364 | } | |
365 | hdlcdrv_transmitter(dev, &bc->hdrv); | |
366 | hdlcdrv_receiver(dev, &bc->hdrv); | |
367 | local_irq_disable(); | |
368 | return IRQ_HANDLED; | |
369 | } | |
370 | ||
371 | /* --------------------------------------------------------------------- */ | |
372 | ||
373 | enum uart { c_uart_unknown, c_uart_8250, | |
374 | c_uart_16450, c_uart_16550, c_uart_16550A}; | |
375 | static const char *uart_str[] = { | |
376 | "unknown", "8250", "16450", "16550", "16550A" | |
377 | }; | |
378 | ||
379 | static enum uart ser12_check_uart(unsigned int iobase) | |
380 | { | |
381 | unsigned char b1,b2,b3; | |
382 | enum uart u; | |
383 | enum uart uart_tab[] = | |
384 | { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A }; | |
385 | ||
386 | b1 = inb(MCR(iobase)); | |
387 | outb(b1 | 0x10, MCR(iobase)); /* loopback mode */ | |
388 | b2 = inb(MSR(iobase)); | |
389 | outb(0x1a, MCR(iobase)); | |
390 | b3 = inb(MSR(iobase)) & 0xf0; | |
391 | outb(b1, MCR(iobase)); /* restore old values */ | |
392 | outb(b2, MSR(iobase)); | |
393 | if (b3 != 0x90) | |
394 | return c_uart_unknown; | |
395 | inb(RBR(iobase)); | |
396 | inb(RBR(iobase)); | |
397 | outb(0x01, FCR(iobase)); /* enable FIFOs */ | |
398 | u = uart_tab[(inb(IIR(iobase)) >> 6) & 3]; | |
399 | if (u == c_uart_16450) { | |
400 | outb(0x5a, SCR(iobase)); | |
401 | b1 = inb(SCR(iobase)); | |
402 | outb(0xa5, SCR(iobase)); | |
403 | b2 = inb(SCR(iobase)); | |
404 | if ((b1 != 0x5a) || (b2 != 0xa5)) | |
405 | u = c_uart_8250; | |
406 | } | |
407 | return u; | |
408 | } | |
409 | ||
410 | /* --------------------------------------------------------------------- */ | |
411 | ||
412 | static int ser12_open(struct net_device *dev) | |
413 | { | |
414 | struct baycom_state *bc = netdev_priv(dev); | |
415 | enum uart u; | |
416 | ||
417 | if (!dev || !bc) | |
418 | return -ENXIO; | |
939456ac | 419 | if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT || |
60e4ad7a | 420 | dev->irq < 2 || dev->irq > nr_irqs) { |
939456ac FH |
421 | printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) " |
422 | "or irq (2 <= irq <= %d)\n", | |
60e4ad7a | 423 | 0xffff-SER12_EXTENT, nr_irqs); |
1da177e4 | 424 | return -ENXIO; |
939456ac FH |
425 | } |
426 | if (bc->baud < 300 || bc->baud > 4800) { | |
427 | printk(KERN_INFO "baycom_ser_fdx: invalid baudrate " | |
428 | "(300...4800)\n"); | |
1da177e4 | 429 | return -EINVAL; |
939456ac | 430 | } |
1da177e4 LT |
431 | if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) { |
432 | printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy \n", | |
433 | dev->base_addr); | |
434 | return -EACCES; | |
435 | } | |
436 | memset(&bc->modem, 0, sizeof(bc->modem)); | |
437 | bc->hdrv.par.bitrate = bc->baud; | |
438 | bc->baud_us = 1000000/bc->baud; | |
439 | bc->baud_uartdiv = (115200/8)/bc->baud; | |
440 | if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown){ | |
441 | release_region(dev->base_addr, SER12_EXTENT); | |
442 | return -EIO; | |
443 | } | |
444 | outb(0, FCR(dev->base_addr)); /* disable FIFOs */ | |
445 | outb(0x0d, MCR(dev->base_addr)); | |
446 | outb(0, IER(dev->base_addr)); | |
1fb9df5d | 447 | if (request_irq(dev->irq, ser12_interrupt, IRQF_DISABLED | IRQF_SHARED, |
1da177e4 LT |
448 | "baycom_ser_fdx", dev)) { |
449 | release_region(dev->base_addr, SER12_EXTENT); | |
450 | return -EBUSY; | |
451 | } | |
452 | /* | |
453 | * set the SIO to 6 Bits/character; during receive, | |
454 | * the baud rate is set to produce 100 ints/sec | |
455 | * to feed the channel arbitration process, | |
456 | * during transmit to baud ints/sec to run | |
457 | * the transmitter | |
458 | */ | |
459 | ser12_set_divisor(dev, 115200/100/8); | |
460 | /* | |
461 | * enable transmitter empty interrupt and modem status interrupt | |
462 | */ | |
463 | outb(0x0a, IER(dev->base_addr)); | |
464 | /* | |
465 | * make sure the next interrupt is generated; | |
466 | * 0 must be used to power the modem; the modem draws its | |
467 | * power from the TxD line | |
468 | */ | |
469 | outb(0x00, THR(dev->base_addr)); | |
470 | hdlcdrv_setdcd(&bc->hdrv, 0); | |
471 | printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %s\n", | |
472 | bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]); | |
473 | return 0; | |
474 | } | |
475 | ||
476 | /* --------------------------------------------------------------------- */ | |
477 | ||
478 | static int ser12_close(struct net_device *dev) | |
479 | { | |
480 | struct baycom_state *bc = netdev_priv(dev); | |
481 | ||
482 | if (!dev || !bc) | |
483 | return -EINVAL; | |
484 | /* | |
485 | * disable interrupts | |
486 | */ | |
487 | outb(0, IER(dev->base_addr)); | |
488 | outb(1, MCR(dev->base_addr)); | |
489 | free_irq(dev->irq, dev); | |
490 | release_region(dev->base_addr, SER12_EXTENT); | |
491 | printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n", | |
492 | bc_drvname, dev->base_addr, dev->irq); | |
493 | return 0; | |
494 | } | |
495 | ||
496 | /* --------------------------------------------------------------------- */ | |
497 | /* | |
498 | * ===================== hdlcdrv driver interface ========================= | |
499 | */ | |
500 | ||
501 | /* --------------------------------------------------------------------- */ | |
502 | ||
503 | static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, | |
504 | struct hdlcdrv_ioctl *hi, int cmd); | |
505 | ||
506 | /* --------------------------------------------------------------------- */ | |
507 | ||
508 | static struct hdlcdrv_ops ser12_ops = { | |
509 | .drvname = bc_drvname, | |
510 | .drvinfo = bc_drvinfo, | |
511 | .open = ser12_open, | |
512 | .close = ser12_close, | |
513 | .ioctl = baycom_ioctl, | |
514 | }; | |
515 | ||
516 | /* --------------------------------------------------------------------- */ | |
517 | ||
518 | static int baycom_setmode(struct baycom_state *bc, const char *modestr) | |
519 | { | |
520 | unsigned int baud; | |
521 | ||
522 | if (!strncmp(modestr, "ser", 3)) { | |
523 | baud = simple_strtoul(modestr+3, NULL, 10); | |
524 | if (baud >= 3 && baud <= 48) | |
525 | bc->baud = baud*100; | |
526 | } | |
527 | if (strchr(modestr, '*')) | |
528 | bc->opt_dcd = 0; | |
529 | else if (strchr(modestr, '+')) | |
530 | bc->opt_dcd = -1; | |
531 | else | |
532 | bc->opt_dcd = 1; | |
533 | return 0; | |
534 | } | |
535 | ||
536 | /* --------------------------------------------------------------------- */ | |
537 | ||
538 | static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, | |
539 | struct hdlcdrv_ioctl *hi, int cmd) | |
540 | { | |
541 | struct baycom_state *bc; | |
542 | struct baycom_ioctl bi; | |
543 | ||
544 | if (!dev) | |
545 | return -EINVAL; | |
546 | ||
547 | bc = netdev_priv(dev); | |
548 | BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC); | |
549 | ||
550 | if (cmd != SIOCDEVPRIVATE) | |
551 | return -ENOIOCTLCMD; | |
552 | switch (hi->cmd) { | |
553 | default: | |
554 | break; | |
555 | ||
556 | case HDLCDRVCTL_GETMODE: | |
557 | sprintf(hi->data.modename, "ser%u", bc->baud / 100); | |
558 | if (bc->opt_dcd <= 0) | |
559 | strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+"); | |
560 | if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) | |
561 | return -EFAULT; | |
562 | return 0; | |
563 | ||
564 | case HDLCDRVCTL_SETMODE: | |
565 | if (netif_running(dev) || !capable(CAP_NET_ADMIN)) | |
566 | return -EACCES; | |
567 | hi->data.modename[sizeof(hi->data.modename)-1] = '\0'; | |
568 | return baycom_setmode(bc, hi->data.modename); | |
569 | ||
570 | case HDLCDRVCTL_MODELIST: | |
571 | strcpy(hi->data.modename, "ser12,ser3,ser24"); | |
572 | if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) | |
573 | return -EFAULT; | |
574 | return 0; | |
575 | ||
576 | case HDLCDRVCTL_MODEMPARMASK: | |
577 | return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ; | |
578 | ||
579 | } | |
580 | ||
581 | if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi))) | |
582 | return -EFAULT; | |
583 | switch (bi.cmd) { | |
584 | default: | |
585 | return -ENOIOCTLCMD; | |
586 | ||
587 | #ifdef BAYCOM_DEBUG | |
588 | case BAYCOMCTL_GETDEBUG: | |
589 | bi.data.dbg.debug1 = bc->hdrv.ptt_keyed; | |
590 | bi.data.dbg.debug2 = bc->debug_vals.last_intcnt; | |
591 | bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr; | |
592 | break; | |
593 | #endif /* BAYCOM_DEBUG */ | |
594 | ||
595 | } | |
596 | if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi))) | |
597 | return -EFAULT; | |
598 | return 0; | |
599 | ||
600 | } | |
601 | ||
602 | /* --------------------------------------------------------------------- */ | |
603 | ||
604 | /* | |
605 | * command line settable parameters | |
606 | */ | |
607 | static char *mode[NR_PORTS] = { "ser12*", }; | |
608 | static int iobase[NR_PORTS] = { 0x3f8, }; | |
609 | static int irq[NR_PORTS] = { 4, }; | |
610 | static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 }; | |
611 | ||
612 | module_param_array(mode, charp, NULL, 0); | |
613 | MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD"); | |
614 | module_param_array(iobase, int, NULL, 0); | |
615 | MODULE_PARM_DESC(iobase, "baycom io base address"); | |
616 | module_param_array(irq, int, NULL, 0); | |
617 | MODULE_PARM_DESC(irq, "baycom irq number"); | |
618 | module_param_array(baud, int, NULL, 0); | |
619 | MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)"); | |
620 | ||
621 | MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); | |
622 | MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver"); | |
623 | MODULE_LICENSE("GPL"); | |
624 | ||
625 | /* --------------------------------------------------------------------- */ | |
626 | ||
627 | static int __init init_baycomserfdx(void) | |
628 | { | |
629 | int i, found = 0; | |
630 | char set_hw = 1; | |
631 | ||
632 | printk(bc_drvinfo); | |
633 | /* | |
634 | * register net devices | |
635 | */ | |
636 | for (i = 0; i < NR_PORTS; i++) { | |
637 | struct net_device *dev; | |
638 | struct baycom_state *bc; | |
639 | char ifname[IFNAMSIZ]; | |
640 | ||
641 | sprintf(ifname, "bcsf%d", i); | |
642 | ||
643 | if (!mode[i]) | |
644 | set_hw = 0; | |
645 | if (!set_hw) | |
646 | iobase[i] = irq[i] = 0; | |
647 | ||
648 | dev = hdlcdrv_register(&ser12_ops, | |
649 | sizeof(struct baycom_state), | |
650 | ifname, iobase[i], irq[i], 0); | |
651 | if (IS_ERR(dev)) | |
652 | break; | |
653 | ||
654 | bc = netdev_priv(dev); | |
655 | if (set_hw && baycom_setmode(bc, mode[i])) | |
656 | set_hw = 0; | |
657 | bc->baud = baud[i]; | |
658 | found++; | |
659 | baycom_device[i] = dev; | |
660 | } | |
661 | ||
662 | if (!found) | |
663 | return -ENXIO; | |
664 | return 0; | |
665 | } | |
666 | ||
667 | static void __exit cleanup_baycomserfdx(void) | |
668 | { | |
669 | int i; | |
670 | ||
671 | for(i = 0; i < NR_PORTS; i++) { | |
672 | struct net_device *dev = baycom_device[i]; | |
673 | if (dev) | |
674 | hdlcdrv_unregister(dev); | |
675 | } | |
676 | } | |
677 | ||
678 | module_init(init_baycomserfdx); | |
679 | module_exit(cleanup_baycomserfdx); | |
680 | ||
681 | /* --------------------------------------------------------------------- */ | |
682 | ||
683 | #ifndef MODULE | |
684 | ||
685 | /* | |
686 | * format: baycom_ser_fdx=io,irq,mode | |
687 | * mode: ser# hardware DCD | |
688 | * ser#* software DCD | |
689 | * ser#+ hardware DCD, inverted signal at DCD pin | |
690 | * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' | |
691 | */ | |
692 | ||
693 | static int __init baycom_ser_fdx_setup(char *str) | |
694 | { | |
695 | static unsigned nr_dev; | |
696 | int ints[4]; | |
697 | ||
698 | if (nr_dev >= NR_PORTS) | |
699 | return 0; | |
700 | str = get_options(str, 4, ints); | |
701 | if (ints[0] < 2) | |
702 | return 0; | |
703 | mode[nr_dev] = str; | |
704 | iobase[nr_dev] = ints[1]; | |
705 | irq[nr_dev] = ints[2]; | |
706 | if (ints[0] >= 3) | |
707 | baud[nr_dev] = ints[3]; | |
708 | nr_dev++; | |
709 | return 1; | |
710 | } | |
711 | ||
712 | __setup("baycom_ser_fdx=", baycom_ser_fdx_setup); | |
713 | ||
714 | #endif /* MODULE */ | |
715 | /* --------------------------------------------------------------------- */ |