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 | |
af901ca1 | 38 | * TXD pin of the serial port. Thus a contiguous stream of 0x00-bytes |
1da177e4 LT |
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> | |
a6b7a407 | 79 | #include <linux/interrupt.h> |
1da177e4 LT |
80 | #include <linux/hdlcdrv.h> |
81 | #include <linux/baycom.h> | |
cd8749b4 | 82 | #include <linux/jiffies.h> |
1da177e4 | 83 | |
5efb764c AM |
84 | #include <asm/uaccess.h> |
85 | #include <asm/io.h> | |
86 | #include <asm/irq.h> | |
87 | ||
1da177e4 LT |
88 | /* --------------------------------------------------------------------- */ |
89 | ||
90 | #define BAYCOM_DEBUG | |
91 | ||
92 | /* --------------------------------------------------------------------- */ | |
93 | ||
94 | static const char bc_drvname[] = "baycom_ser_fdx"; | |
95 | static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n" | |
c1afba3c | 96 | "baycom_ser_fdx: version 0.10\n"; |
1da177e4 LT |
97 | |
98 | /* --------------------------------------------------------------------- */ | |
99 | ||
100 | #define NR_PORTS 4 | |
101 | ||
102 | static struct net_device *baycom_device[NR_PORTS]; | |
103 | ||
104 | /* --------------------------------------------------------------------- */ | |
105 | ||
106 | #define RBR(iobase) (iobase+0) | |
107 | #define THR(iobase) (iobase+0) | |
108 | #define IER(iobase) (iobase+1) | |
109 | #define IIR(iobase) (iobase+2) | |
110 | #define FCR(iobase) (iobase+2) | |
111 | #define LCR(iobase) (iobase+3) | |
112 | #define MCR(iobase) (iobase+4) | |
113 | #define LSR(iobase) (iobase+5) | |
114 | #define MSR(iobase) (iobase+6) | |
115 | #define SCR(iobase) (iobase+7) | |
116 | #define DLL(iobase) (iobase+0) | |
117 | #define DLM(iobase) (iobase+1) | |
118 | ||
119 | #define SER12_EXTENT 8 | |
120 | ||
121 | /* ---------------------------------------------------------------------- */ | |
122 | /* | |
123 | * Information that need to be kept for each board. | |
124 | */ | |
125 | ||
126 | struct baycom_state { | |
127 | struct hdlcdrv_state hdrv; | |
128 | ||
129 | unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout; | |
130 | int opt_dcd; | |
131 | ||
132 | struct modem_state { | |
133 | unsigned char flags; | |
134 | unsigned char ptt; | |
135 | unsigned int shreg; | |
136 | struct modem_state_ser12 { | |
137 | unsigned char tx_bit; | |
138 | unsigned char last_rxbit; | |
139 | int dcd_sum0, dcd_sum1, dcd_sum2; | |
140 | int dcd_time; | |
141 | unsigned int pll_time; | |
142 | unsigned int txshreg; | |
143 | } ser12; | |
144 | } modem; | |
145 | ||
146 | #ifdef BAYCOM_DEBUG | |
147 | struct debug_vals { | |
148 | unsigned long last_jiffies; | |
149 | unsigned cur_intcnt; | |
150 | unsigned last_intcnt; | |
151 | int cur_pllcorr; | |
152 | int last_pllcorr; | |
153 | } debug_vals; | |
154 | #endif /* BAYCOM_DEBUG */ | |
155 | }; | |
156 | ||
157 | /* --------------------------------------------------------------------- */ | |
158 | ||
159 | static inline void baycom_int_freq(struct baycom_state *bc) | |
160 | { | |
161 | #ifdef BAYCOM_DEBUG | |
162 | unsigned long cur_jiffies = jiffies; | |
163 | /* | |
164 | * measure the interrupt frequency | |
165 | */ | |
166 | bc->debug_vals.cur_intcnt++; | |
cd8749b4 | 167 | if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { |
1da177e4 LT |
168 | bc->debug_vals.last_jiffies = cur_jiffies; |
169 | bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; | |
170 | bc->debug_vals.cur_intcnt = 0; | |
171 | bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; | |
172 | bc->debug_vals.cur_pllcorr = 0; | |
173 | } | |
174 | #endif /* BAYCOM_DEBUG */ | |
175 | } | |
176 | ||
177 | /* --------------------------------------------------------------------- */ | |
178 | /* | |
179 | * ===================== SER12 specific routines ========================= | |
180 | */ | |
181 | ||
182 | /* --------------------------------------------------------------------- */ | |
183 | ||
184 | static inline void ser12_set_divisor(struct net_device *dev, | |
185 | unsigned int divisor) | |
186 | { | |
187 | outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */ | |
188 | outb(divisor, DLL(dev->base_addr)); | |
189 | outb(divisor >> 8, DLM(dev->base_addr)); | |
190 | outb(0x01, LCR(dev->base_addr)); /* word length = 6 */ | |
191 | /* | |
192 | * make sure the next interrupt is generated; | |
193 | * 0 must be used to power the modem; the modem draws its | |
194 | * power from the TxD line | |
195 | */ | |
196 | outb(0x00, THR(dev->base_addr)); | |
197 | /* | |
198 | * it is important not to set the divider while transmitting; | |
199 | * this reportedly makes some UARTs generating interrupts | |
200 | * in the hundredthousands per second region | |
201 | * Reported by: Ignacio.Arenaza@studi.epfl.ch (Ignacio Arenaza Nuno) | |
202 | */ | |
203 | } | |
204 | ||
205 | /* --------------------------------------------------------------------- */ | |
206 | ||
207 | #if 0 | |
208 | static inline unsigned int hweight16(unsigned int w) | |
209 | __attribute__ ((unused)); | |
210 | static inline unsigned int hweight8(unsigned int w) | |
211 | __attribute__ ((unused)); | |
212 | ||
213 | static inline unsigned int hweight16(unsigned int w) | |
214 | { | |
215 | unsigned short res = (w & 0x5555) + ((w >> 1) & 0x5555); | |
216 | res = (res & 0x3333) + ((res >> 2) & 0x3333); | |
217 | res = (res & 0x0F0F) + ((res >> 4) & 0x0F0F); | |
218 | return (res & 0x00FF) + ((res >> 8) & 0x00FF); | |
219 | } | |
220 | ||
221 | static inline unsigned int hweight8(unsigned int w) | |
222 | { | |
223 | unsigned short res = (w & 0x55) + ((w >> 1) & 0x55); | |
224 | res = (res & 0x33) + ((res >> 2) & 0x33); | |
225 | return (res & 0x0F) + ((res >> 4) & 0x0F); | |
226 | } | |
227 | #endif | |
228 | ||
229 | /* --------------------------------------------------------------------- */ | |
230 | ||
231 | static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timeval *tv, unsigned char curs) | |
232 | { | |
233 | int timediff; | |
234 | int bdus8 = bc->baud_us >> 3; | |
235 | int bdus4 = bc->baud_us >> 2; | |
236 | int bdus2 = bc->baud_us >> 1; | |
237 | ||
238 | timediff = 1000000 + tv->tv_usec - bc->modem.ser12.pll_time; | |
239 | while (timediff >= 500000) | |
240 | timediff -= 1000000; | |
241 | while (timediff >= bdus2) { | |
242 | timediff -= bc->baud_us; | |
243 | bc->modem.ser12.pll_time += bc->baud_us; | |
244 | bc->modem.ser12.dcd_time--; | |
245 | /* first check if there is room to add a bit */ | |
246 | if (bc->modem.shreg & 1) { | |
247 | hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff); | |
248 | bc->modem.shreg = 0x10000; | |
249 | } | |
250 | /* add a one bit */ | |
251 | bc->modem.shreg >>= 1; | |
252 | } | |
253 | if (bc->modem.ser12.dcd_time <= 0) { | |
254 | if (!bc->opt_dcd) | |
255 | hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 + | |
256 | bc->modem.ser12.dcd_sum1 + | |
257 | bc->modem.ser12.dcd_sum2) < 0); | |
258 | bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1; | |
259 | bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0; | |
260 | bc->modem.ser12.dcd_sum0 = 2; /* slight bias */ | |
261 | bc->modem.ser12.dcd_time += 120; | |
262 | } | |
263 | if (bc->modem.ser12.last_rxbit != curs) { | |
264 | bc->modem.ser12.last_rxbit = curs; | |
265 | bc->modem.shreg |= 0x10000; | |
266 | /* adjust the PLL */ | |
267 | if (timediff > 0) | |
268 | bc->modem.ser12.pll_time += bdus8; | |
269 | else | |
270 | bc->modem.ser12.pll_time += 1000000 - bdus8; | |
271 | /* update DCD */ | |
272 | if (abs(timediff) > bdus4) | |
273 | bc->modem.ser12.dcd_sum0 += 4; | |
274 | else | |
275 | bc->modem.ser12.dcd_sum0--; | |
276 | #ifdef BAYCOM_DEBUG | |
277 | bc->debug_vals.cur_pllcorr = timediff; | |
278 | #endif /* BAYCOM_DEBUG */ | |
279 | } | |
280 | while (bc->modem.ser12.pll_time >= 1000000) | |
281 | bc->modem.ser12.pll_time -= 1000000; | |
282 | } | |
283 | ||
284 | /* --------------------------------------------------------------------- */ | |
285 | ||
7d12e780 | 286 | static irqreturn_t ser12_interrupt(int irq, void *dev_id) |
1da177e4 LT |
287 | { |
288 | struct net_device *dev = (struct net_device *)dev_id; | |
289 | struct baycom_state *bc = netdev_priv(dev); | |
290 | struct timeval tv; | |
291 | unsigned char iir, msr; | |
292 | unsigned int txcount = 0; | |
293 | ||
294 | if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC) | |
295 | return IRQ_NONE; | |
296 | /* fast way out for shared irq */ | |
297 | if ((iir = inb(IIR(dev->base_addr))) & 1) | |
298 | return IRQ_NONE; | |
299 | /* get current time */ | |
300 | do_gettimeofday(&tv); | |
301 | msr = inb(MSR(dev->base_addr)); | |
302 | /* delta DCD */ | |
303 | if ((msr & 8) && bc->opt_dcd) | |
304 | hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); | |
305 | do { | |
306 | switch (iir & 6) { | |
307 | case 6: | |
308 | inb(LSR(dev->base_addr)); | |
309 | break; | |
310 | ||
311 | case 4: | |
312 | inb(RBR(dev->base_addr)); | |
313 | break; | |
314 | ||
315 | case 2: | |
316 | /* | |
317 | * make sure the next interrupt is generated; | |
318 | * 0 must be used to power the modem; the modem draws its | |
319 | * power from the TxD line | |
320 | */ | |
321 | outb(0x00, THR(dev->base_addr)); | |
322 | baycom_int_freq(bc); | |
323 | txcount++; | |
324 | /* | |
325 | * first output the last bit (!) then call HDLC transmitter, | |
326 | * since this may take quite long | |
327 | */ | |
328 | if (bc->modem.ptt) | |
329 | outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr)); | |
330 | else | |
331 | outb(0x0d, MCR(dev->base_addr)); /* transmitter off */ | |
332 | break; | |
333 | ||
334 | default: | |
335 | msr = inb(MSR(dev->base_addr)); | |
336 | /* delta DCD */ | |
337 | if ((msr & 8) && bc->opt_dcd) | |
338 | hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); | |
339 | break; | |
340 | } | |
341 | iir = inb(IIR(dev->base_addr)); | |
342 | } while (!(iir & 1)); | |
343 | ser12_rx(dev, bc, &tv, msr & 0x10); /* CTS */ | |
344 | if (bc->modem.ptt && txcount) { | |
345 | if (bc->modem.ser12.txshreg <= 1) { | |
346 | bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv); | |
347 | if (!hdlcdrv_ptt(&bc->hdrv)) { | |
348 | ser12_set_divisor(dev, 115200/100/8); | |
349 | bc->modem.ptt = 0; | |
350 | goto end_transmit; | |
351 | } | |
352 | } | |
353 | bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1)); | |
354 | bc->modem.ser12.txshreg >>= 1; | |
355 | } | |
356 | end_transmit: | |
357 | local_irq_enable(); | |
358 | if (!bc->modem.ptt && txcount) { | |
359 | hdlcdrv_arbitrate(dev, &bc->hdrv); | |
360 | if (hdlcdrv_ptt(&bc->hdrv)) { | |
361 | ser12_set_divisor(dev, bc->baud_uartdiv); | |
362 | bc->modem.ser12.txshreg = 1; | |
363 | bc->modem.ptt = 1; | |
364 | } | |
365 | } | |
366 | hdlcdrv_transmitter(dev, &bc->hdrv); | |
367 | hdlcdrv_receiver(dev, &bc->hdrv); | |
368 | local_irq_disable(); | |
369 | return IRQ_HANDLED; | |
370 | } | |
371 | ||
372 | /* --------------------------------------------------------------------- */ | |
373 | ||
374 | enum uart { c_uart_unknown, c_uart_8250, | |
375 | c_uart_16450, c_uart_16550, c_uart_16550A}; | |
376 | static const char *uart_str[] = { | |
377 | "unknown", "8250", "16450", "16550", "16550A" | |
378 | }; | |
379 | ||
380 | static enum uart ser12_check_uart(unsigned int iobase) | |
381 | { | |
382 | unsigned char b1,b2,b3; | |
383 | enum uart u; | |
384 | enum uart uart_tab[] = | |
385 | { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A }; | |
386 | ||
387 | b1 = inb(MCR(iobase)); | |
388 | outb(b1 | 0x10, MCR(iobase)); /* loopback mode */ | |
389 | b2 = inb(MSR(iobase)); | |
390 | outb(0x1a, MCR(iobase)); | |
391 | b3 = inb(MSR(iobase)) & 0xf0; | |
392 | outb(b1, MCR(iobase)); /* restore old values */ | |
393 | outb(b2, MSR(iobase)); | |
394 | if (b3 != 0x90) | |
395 | return c_uart_unknown; | |
396 | inb(RBR(iobase)); | |
397 | inb(RBR(iobase)); | |
398 | outb(0x01, FCR(iobase)); /* enable FIFOs */ | |
399 | u = uart_tab[(inb(IIR(iobase)) >> 6) & 3]; | |
400 | if (u == c_uart_16450) { | |
401 | outb(0x5a, SCR(iobase)); | |
402 | b1 = inb(SCR(iobase)); | |
403 | outb(0xa5, SCR(iobase)); | |
404 | b2 = inb(SCR(iobase)); | |
405 | if ((b1 != 0x5a) || (b2 != 0xa5)) | |
406 | u = c_uart_8250; | |
407 | } | |
408 | return u; | |
409 | } | |
410 | ||
411 | /* --------------------------------------------------------------------- */ | |
412 | ||
413 | static int ser12_open(struct net_device *dev) | |
414 | { | |
415 | struct baycom_state *bc = netdev_priv(dev); | |
416 | enum uart u; | |
417 | ||
418 | if (!dev || !bc) | |
419 | return -ENXIO; | |
939456ac | 420 | if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT || |
60e4ad7a | 421 | dev->irq < 2 || dev->irq > nr_irqs) { |
939456ac FH |
422 | printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) " |
423 | "or irq (2 <= irq <= %d)\n", | |
60e4ad7a | 424 | 0xffff-SER12_EXTENT, nr_irqs); |
1da177e4 | 425 | return -ENXIO; |
939456ac FH |
426 | } |
427 | if (bc->baud < 300 || bc->baud > 4800) { | |
428 | printk(KERN_INFO "baycom_ser_fdx: invalid baudrate " | |
429 | "(300...4800)\n"); | |
1da177e4 | 430 | return -EINVAL; |
939456ac | 431 | } |
1da177e4 | 432 | if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) { |
2381a55c | 433 | printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy\n", |
1da177e4 LT |
434 | dev->base_addr); |
435 | return -EACCES; | |
436 | } | |
437 | memset(&bc->modem, 0, sizeof(bc->modem)); | |
438 | bc->hdrv.par.bitrate = bc->baud; | |
439 | bc->baud_us = 1000000/bc->baud; | |
440 | bc->baud_uartdiv = (115200/8)/bc->baud; | |
441 | if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown){ | |
442 | release_region(dev->base_addr, SER12_EXTENT); | |
443 | return -EIO; | |
444 | } | |
445 | outb(0, FCR(dev->base_addr)); /* disable FIFOs */ | |
446 | outb(0x0d, MCR(dev->base_addr)); | |
447 | outb(0, IER(dev->base_addr)); | |
1fb9df5d | 448 | if (request_irq(dev->irq, ser12_interrupt, IRQF_DISABLED | IRQF_SHARED, |
1da177e4 LT |
449 | "baycom_ser_fdx", dev)) { |
450 | release_region(dev->base_addr, SER12_EXTENT); | |
451 | return -EBUSY; | |
452 | } | |
453 | /* | |
454 | * set the SIO to 6 Bits/character; during receive, | |
455 | * the baud rate is set to produce 100 ints/sec | |
456 | * to feed the channel arbitration process, | |
457 | * during transmit to baud ints/sec to run | |
458 | * the transmitter | |
459 | */ | |
460 | ser12_set_divisor(dev, 115200/100/8); | |
461 | /* | |
462 | * enable transmitter empty interrupt and modem status interrupt | |
463 | */ | |
464 | outb(0x0a, IER(dev->base_addr)); | |
465 | /* | |
466 | * make sure the next interrupt is generated; | |
467 | * 0 must be used to power the modem; the modem draws its | |
468 | * power from the TxD line | |
469 | */ | |
470 | outb(0x00, THR(dev->base_addr)); | |
471 | hdlcdrv_setdcd(&bc->hdrv, 0); | |
472 | printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %s\n", | |
473 | bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]); | |
474 | return 0; | |
475 | } | |
476 | ||
477 | /* --------------------------------------------------------------------- */ | |
478 | ||
479 | static int ser12_close(struct net_device *dev) | |
480 | { | |
481 | struct baycom_state *bc = netdev_priv(dev); | |
482 | ||
483 | if (!dev || !bc) | |
484 | return -EINVAL; | |
485 | /* | |
486 | * disable interrupts | |
487 | */ | |
488 | outb(0, IER(dev->base_addr)); | |
489 | outb(1, MCR(dev->base_addr)); | |
490 | free_irq(dev->irq, dev); | |
491 | release_region(dev->base_addr, SER12_EXTENT); | |
492 | printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n", | |
493 | bc_drvname, dev->base_addr, dev->irq); | |
494 | return 0; | |
495 | } | |
496 | ||
497 | /* --------------------------------------------------------------------- */ | |
498 | /* | |
499 | * ===================== hdlcdrv driver interface ========================= | |
500 | */ | |
501 | ||
502 | /* --------------------------------------------------------------------- */ | |
503 | ||
504 | static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, | |
505 | struct hdlcdrv_ioctl *hi, int cmd); | |
506 | ||
507 | /* --------------------------------------------------------------------- */ | |
508 | ||
509 | static struct hdlcdrv_ops ser12_ops = { | |
510 | .drvname = bc_drvname, | |
511 | .drvinfo = bc_drvinfo, | |
512 | .open = ser12_open, | |
513 | .close = ser12_close, | |
514 | .ioctl = baycom_ioctl, | |
515 | }; | |
516 | ||
517 | /* --------------------------------------------------------------------- */ | |
518 | ||
519 | static int baycom_setmode(struct baycom_state *bc, const char *modestr) | |
520 | { | |
521 | unsigned int baud; | |
522 | ||
523 | if (!strncmp(modestr, "ser", 3)) { | |
524 | baud = simple_strtoul(modestr+3, NULL, 10); | |
525 | if (baud >= 3 && baud <= 48) | |
526 | bc->baud = baud*100; | |
527 | } | |
528 | if (strchr(modestr, '*')) | |
529 | bc->opt_dcd = 0; | |
530 | else if (strchr(modestr, '+')) | |
531 | bc->opt_dcd = -1; | |
532 | else | |
533 | bc->opt_dcd = 1; | |
534 | return 0; | |
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 | struct baycom_state *bc; | |
543 | struct baycom_ioctl bi; | |
544 | ||
545 | if (!dev) | |
546 | return -EINVAL; | |
547 | ||
548 | bc = netdev_priv(dev); | |
549 | BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC); | |
550 | ||
551 | if (cmd != SIOCDEVPRIVATE) | |
552 | return -ENOIOCTLCMD; | |
553 | switch (hi->cmd) { | |
554 | default: | |
555 | break; | |
556 | ||
557 | case HDLCDRVCTL_GETMODE: | |
558 | sprintf(hi->data.modename, "ser%u", bc->baud / 100); | |
559 | if (bc->opt_dcd <= 0) | |
560 | strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+"); | |
561 | if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) | |
562 | return -EFAULT; | |
563 | return 0; | |
564 | ||
565 | case HDLCDRVCTL_SETMODE: | |
566 | if (netif_running(dev) || !capable(CAP_NET_ADMIN)) | |
567 | return -EACCES; | |
568 | hi->data.modename[sizeof(hi->data.modename)-1] = '\0'; | |
569 | return baycom_setmode(bc, hi->data.modename); | |
570 | ||
571 | case HDLCDRVCTL_MODELIST: | |
572 | strcpy(hi->data.modename, "ser12,ser3,ser24"); | |
573 | if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) | |
574 | return -EFAULT; | |
575 | return 0; | |
576 | ||
577 | case HDLCDRVCTL_MODEMPARMASK: | |
578 | return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ; | |
579 | ||
580 | } | |
581 | ||
582 | if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi))) | |
583 | return -EFAULT; | |
584 | switch (bi.cmd) { | |
585 | default: | |
586 | return -ENOIOCTLCMD; | |
587 | ||
588 | #ifdef BAYCOM_DEBUG | |
589 | case BAYCOMCTL_GETDEBUG: | |
590 | bi.data.dbg.debug1 = bc->hdrv.ptt_keyed; | |
591 | bi.data.dbg.debug2 = bc->debug_vals.last_intcnt; | |
592 | bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr; | |
593 | break; | |
594 | #endif /* BAYCOM_DEBUG */ | |
595 | ||
596 | } | |
597 | if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi))) | |
598 | return -EFAULT; | |
599 | return 0; | |
600 | ||
601 | } | |
602 | ||
603 | /* --------------------------------------------------------------------- */ | |
604 | ||
605 | /* | |
606 | * command line settable parameters | |
607 | */ | |
608 | static char *mode[NR_PORTS] = { "ser12*", }; | |
609 | static int iobase[NR_PORTS] = { 0x3f8, }; | |
610 | static int irq[NR_PORTS] = { 4, }; | |
611 | static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 }; | |
612 | ||
613 | module_param_array(mode, charp, NULL, 0); | |
614 | MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD"); | |
615 | module_param_array(iobase, int, NULL, 0); | |
616 | MODULE_PARM_DESC(iobase, "baycom io base address"); | |
617 | module_param_array(irq, int, NULL, 0); | |
618 | MODULE_PARM_DESC(irq, "baycom irq number"); | |
619 | module_param_array(baud, int, NULL, 0); | |
620 | MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)"); | |
621 | ||
622 | MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); | |
623 | MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver"); | |
624 | MODULE_LICENSE("GPL"); | |
625 | ||
626 | /* --------------------------------------------------------------------- */ | |
627 | ||
628 | static int __init init_baycomserfdx(void) | |
629 | { | |
630 | int i, found = 0; | |
631 | char set_hw = 1; | |
632 | ||
633 | printk(bc_drvinfo); | |
634 | /* | |
635 | * register net devices | |
636 | */ | |
637 | for (i = 0; i < NR_PORTS; i++) { | |
638 | struct net_device *dev; | |
639 | struct baycom_state *bc; | |
640 | char ifname[IFNAMSIZ]; | |
641 | ||
642 | sprintf(ifname, "bcsf%d", i); | |
643 | ||
644 | if (!mode[i]) | |
645 | set_hw = 0; | |
646 | if (!set_hw) | |
647 | iobase[i] = irq[i] = 0; | |
648 | ||
649 | dev = hdlcdrv_register(&ser12_ops, | |
650 | sizeof(struct baycom_state), | |
651 | ifname, iobase[i], irq[i], 0); | |
652 | if (IS_ERR(dev)) | |
653 | break; | |
654 | ||
655 | bc = netdev_priv(dev); | |
656 | if (set_hw && baycom_setmode(bc, mode[i])) | |
657 | set_hw = 0; | |
658 | bc->baud = baud[i]; | |
659 | found++; | |
660 | baycom_device[i] = dev; | |
661 | } | |
662 | ||
663 | if (!found) | |
664 | return -ENXIO; | |
665 | return 0; | |
666 | } | |
667 | ||
668 | static void __exit cleanup_baycomserfdx(void) | |
669 | { | |
670 | int i; | |
671 | ||
672 | for(i = 0; i < NR_PORTS; i++) { | |
673 | struct net_device *dev = baycom_device[i]; | |
674 | if (dev) | |
675 | hdlcdrv_unregister(dev); | |
676 | } | |
677 | } | |
678 | ||
679 | module_init(init_baycomserfdx); | |
680 | module_exit(cleanup_baycomserfdx); | |
681 | ||
682 | /* --------------------------------------------------------------------- */ | |
683 | ||
684 | #ifndef MODULE | |
685 | ||
686 | /* | |
687 | * format: baycom_ser_fdx=io,irq,mode | |
688 | * mode: ser# hardware DCD | |
689 | * ser#* software DCD | |
690 | * ser#+ hardware DCD, inverted signal at DCD pin | |
691 | * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' | |
692 | */ | |
693 | ||
694 | static int __init baycom_ser_fdx_setup(char *str) | |
695 | { | |
696 | static unsigned nr_dev; | |
697 | int ints[4]; | |
698 | ||
699 | if (nr_dev >= NR_PORTS) | |
700 | return 0; | |
701 | str = get_options(str, 4, ints); | |
702 | if (ints[0] < 2) | |
703 | return 0; | |
704 | mode[nr_dev] = str; | |
705 | iobase[nr_dev] = ints[1]; | |
706 | irq[nr_dev] = ints[2]; | |
707 | if (ints[0] >= 3) | |
708 | baud[nr_dev] = ints[3]; | |
709 | nr_dev++; | |
710 | return 1; | |
711 | } | |
712 | ||
713 | __setup("baycom_ser_fdx=", baycom_ser_fdx_setup); | |
714 | ||
715 | #endif /* MODULE */ | |
716 | /* --------------------------------------------------------------------- */ |