]>
Commit | Line | Data |
---|---|---|
3f5296f0 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /*****************************************************************************/ |
3 | ||
4 | /* | |
5 | * baycom_ser_fdx.c -- baycom ser12 fullduplex radio modem driver. | |
6 | * | |
7 | * Copyright (C) 1996-2000 Thomas Sailer (sailer@ife.ee.ethz.ch) | |
8 | * | |
1da177e4 LT |
9 | * Please note that the GPL allows you to use the driver, NOT the radio. |
10 | * In order to use the radio, you need a license from the communications | |
11 | * authority of your country. | |
12 | * | |
1da177e4 LT |
13 | * Supported modems |
14 | * | |
15 | * ser12: This is a very simple 1200 baud AFSK modem. The modem consists only | |
16 | * of a modulator/demodulator chip, usually a TI TCM3105. The computer | |
17 | * is responsible for regenerating the receiver bit clock, as well as | |
18 | * for handling the HDLC protocol. The modem connects to a serial port, | |
19 | * hence the name. Since the serial port is not used as an async serial | |
20 | * port, the kernel driver for serial ports cannot be used, and this | |
21 | * driver only supports standard serial hardware (8250, 16450, 16550A) | |
22 | * | |
23 | * This modem usually draws its supply current out of the otherwise unused | |
af901ca1 | 24 | * TXD pin of the serial port. Thus a contiguous stream of 0x00-bytes |
1da177e4 LT |
25 | * is transmitted to achieve a positive supply voltage. |
26 | * | |
27 | * hsk: This is a 4800 baud FSK modem, designed for TNC use. It works fine | |
28 | * in 'baycom-mode' :-) In contrast to the TCM3105 modem, power is | |
29 | * externally supplied. So there's no need to provide the 0x00-byte-stream | |
30 | * when receiving or idle, which drastically reduces interrupt load. | |
31 | * | |
32 | * Command line options (insmod command line) | |
33 | * | |
34 | * mode ser# hardware DCD | |
35 | * ser#* software DCD | |
36 | * ser#+ hardware DCD, inverted signal at DCD pin | |
37 | * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' | |
38 | * iobase base address of the port; common values are 0x3f8, 0x2f8, 0x3e8, 0x2e8 | |
39 | * baud baud rate (between 300 and 4800) | |
40 | * irq interrupt line of the port; common values are 4,3 | |
41 | * | |
1da177e4 LT |
42 | * History: |
43 | * 0.1 26.06.1996 Adapted from baycom.c and made network driver interface | |
44 | * 18.10.1996 Changed to new user space access routines (copy_{to,from}_user) | |
45 | * 0.3 26.04.1997 init code/data tagged | |
46 | * 0.4 08.07.1997 alternative ser12 decoding algorithm (uses delta CTS ints) | |
47 | * 0.5 11.11.1997 ser12/par96 split into separate files | |
48 | * 0.6 24.01.1998 Thorsten Kranzkowski, dl8bcu and Thomas Sailer: | |
49 | * reduced interrupt load in transmit case | |
50 | * reworked receiver | |
51 | * 0.7 03.08.1999 adapt to Linus' new __setup/__initcall | |
52 | * 0.8 10.08.1999 use module_init/module_exit | |
53 | * 0.9 12.02.2000 adapted to softnet driver interface | |
54 | * 0.10 03.07.2000 fix interface name handling | |
55 | */ | |
56 | ||
57 | /*****************************************************************************/ | |
58 | ||
d43c36dc | 59 | #include <linux/capability.h> |
1da177e4 LT |
60 | #include <linux/module.h> |
61 | #include <linux/ioport.h> | |
62 | #include <linux/string.h> | |
63 | #include <linux/init.h> | |
a6b7a407 | 64 | #include <linux/interrupt.h> |
1da177e4 LT |
65 | #include <linux/hdlcdrv.h> |
66 | #include <linux/baycom.h> | |
cd8749b4 | 67 | #include <linux/jiffies.h> |
e6515203 | 68 | #include <linux/time64.h> |
1da177e4 | 69 | |
7c0f6ba6 | 70 | #include <linux/uaccess.h> |
5efb764c AM |
71 | #include <asm/io.h> |
72 | #include <asm/irq.h> | |
73 | ||
1da177e4 LT |
74 | /* --------------------------------------------------------------------- */ |
75 | ||
76 | #define BAYCOM_DEBUG | |
77 | ||
78 | /* --------------------------------------------------------------------- */ | |
79 | ||
80 | static const char bc_drvname[] = "baycom_ser_fdx"; | |
81 | static const char bc_drvinfo[] = KERN_INFO "baycom_ser_fdx: (C) 1996-2000 Thomas Sailer, HB9JNX/AE4WA\n" | |
c1afba3c | 82 | "baycom_ser_fdx: version 0.10\n"; |
1da177e4 LT |
83 | |
84 | /* --------------------------------------------------------------------- */ | |
85 | ||
86 | #define NR_PORTS 4 | |
87 | ||
88 | static struct net_device *baycom_device[NR_PORTS]; | |
89 | ||
90 | /* --------------------------------------------------------------------- */ | |
91 | ||
92 | #define RBR(iobase) (iobase+0) | |
93 | #define THR(iobase) (iobase+0) | |
94 | #define IER(iobase) (iobase+1) | |
95 | #define IIR(iobase) (iobase+2) | |
96 | #define FCR(iobase) (iobase+2) | |
97 | #define LCR(iobase) (iobase+3) | |
98 | #define MCR(iobase) (iobase+4) | |
99 | #define LSR(iobase) (iobase+5) | |
100 | #define MSR(iobase) (iobase+6) | |
101 | #define SCR(iobase) (iobase+7) | |
102 | #define DLL(iobase) (iobase+0) | |
103 | #define DLM(iobase) (iobase+1) | |
104 | ||
105 | #define SER12_EXTENT 8 | |
106 | ||
107 | /* ---------------------------------------------------------------------- */ | |
108 | /* | |
109 | * Information that need to be kept for each board. | |
110 | */ | |
111 | ||
112 | struct baycom_state { | |
113 | struct hdlcdrv_state hdrv; | |
114 | ||
115 | unsigned int baud, baud_us, baud_arbdiv, baud_uartdiv, baud_dcdtimeout; | |
116 | int opt_dcd; | |
117 | ||
118 | struct modem_state { | |
119 | unsigned char flags; | |
120 | unsigned char ptt; | |
121 | unsigned int shreg; | |
122 | struct modem_state_ser12 { | |
123 | unsigned char tx_bit; | |
124 | unsigned char last_rxbit; | |
125 | int dcd_sum0, dcd_sum1, dcd_sum2; | |
126 | int dcd_time; | |
127 | unsigned int pll_time; | |
128 | unsigned int txshreg; | |
129 | } ser12; | |
130 | } modem; | |
131 | ||
132 | #ifdef BAYCOM_DEBUG | |
133 | struct debug_vals { | |
134 | unsigned long last_jiffies; | |
135 | unsigned cur_intcnt; | |
136 | unsigned last_intcnt; | |
137 | int cur_pllcorr; | |
138 | int last_pllcorr; | |
139 | } debug_vals; | |
140 | #endif /* BAYCOM_DEBUG */ | |
141 | }; | |
142 | ||
143 | /* --------------------------------------------------------------------- */ | |
144 | ||
145 | static inline void baycom_int_freq(struct baycom_state *bc) | |
146 | { | |
147 | #ifdef BAYCOM_DEBUG | |
148 | unsigned long cur_jiffies = jiffies; | |
149 | /* | |
150 | * measure the interrupt frequency | |
151 | */ | |
152 | bc->debug_vals.cur_intcnt++; | |
cd8749b4 | 153 | if (time_after_eq(cur_jiffies, bc->debug_vals.last_jiffies + HZ)) { |
1da177e4 LT |
154 | bc->debug_vals.last_jiffies = cur_jiffies; |
155 | bc->debug_vals.last_intcnt = bc->debug_vals.cur_intcnt; | |
156 | bc->debug_vals.cur_intcnt = 0; | |
157 | bc->debug_vals.last_pllcorr = bc->debug_vals.cur_pllcorr; | |
158 | bc->debug_vals.cur_pllcorr = 0; | |
159 | } | |
160 | #endif /* BAYCOM_DEBUG */ | |
161 | } | |
162 | ||
163 | /* --------------------------------------------------------------------- */ | |
164 | /* | |
165 | * ===================== SER12 specific routines ========================= | |
166 | */ | |
167 | ||
168 | /* --------------------------------------------------------------------- */ | |
169 | ||
170 | static inline void ser12_set_divisor(struct net_device *dev, | |
171 | unsigned int divisor) | |
172 | { | |
173 | outb(0x81, LCR(dev->base_addr)); /* DLAB = 1 */ | |
174 | outb(divisor, DLL(dev->base_addr)); | |
175 | outb(divisor >> 8, 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 | ||
e6515203 | 191 | static __inline__ void ser12_rx(struct net_device *dev, struct baycom_state *bc, struct timespec64 *ts, unsigned char curs) |
1da177e4 LT |
192 | { |
193 | int timediff; | |
194 | int bdus8 = bc->baud_us >> 3; | |
195 | int bdus4 = bc->baud_us >> 2; | |
196 | int bdus2 = bc->baud_us >> 1; | |
197 | ||
e6515203 AKC |
198 | timediff = 1000000 + ts->tv_nsec / NSEC_PER_USEC - |
199 | bc->modem.ser12.pll_time; | |
1da177e4 LT |
200 | while (timediff >= 500000) |
201 | timediff -= 1000000; | |
202 | while (timediff >= bdus2) { | |
203 | timediff -= bc->baud_us; | |
204 | bc->modem.ser12.pll_time += bc->baud_us; | |
205 | bc->modem.ser12.dcd_time--; | |
206 | /* first check if there is room to add a bit */ | |
207 | if (bc->modem.shreg & 1) { | |
208 | hdlcdrv_putbits(&bc->hdrv, (bc->modem.shreg >> 1) ^ 0xffff); | |
209 | bc->modem.shreg = 0x10000; | |
210 | } | |
211 | /* add a one bit */ | |
212 | bc->modem.shreg >>= 1; | |
213 | } | |
214 | if (bc->modem.ser12.dcd_time <= 0) { | |
215 | if (!bc->opt_dcd) | |
216 | hdlcdrv_setdcd(&bc->hdrv, (bc->modem.ser12.dcd_sum0 + | |
217 | bc->modem.ser12.dcd_sum1 + | |
218 | bc->modem.ser12.dcd_sum2) < 0); | |
219 | bc->modem.ser12.dcd_sum2 = bc->modem.ser12.dcd_sum1; | |
220 | bc->modem.ser12.dcd_sum1 = bc->modem.ser12.dcd_sum0; | |
221 | bc->modem.ser12.dcd_sum0 = 2; /* slight bias */ | |
222 | bc->modem.ser12.dcd_time += 120; | |
223 | } | |
224 | if (bc->modem.ser12.last_rxbit != curs) { | |
225 | bc->modem.ser12.last_rxbit = curs; | |
226 | bc->modem.shreg |= 0x10000; | |
227 | /* adjust the PLL */ | |
228 | if (timediff > 0) | |
229 | bc->modem.ser12.pll_time += bdus8; | |
230 | else | |
231 | bc->modem.ser12.pll_time += 1000000 - bdus8; | |
232 | /* update DCD */ | |
233 | if (abs(timediff) > bdus4) | |
234 | bc->modem.ser12.dcd_sum0 += 4; | |
235 | else | |
236 | bc->modem.ser12.dcd_sum0--; | |
237 | #ifdef BAYCOM_DEBUG | |
238 | bc->debug_vals.cur_pllcorr = timediff; | |
239 | #endif /* BAYCOM_DEBUG */ | |
240 | } | |
241 | while (bc->modem.ser12.pll_time >= 1000000) | |
242 | bc->modem.ser12.pll_time -= 1000000; | |
243 | } | |
244 | ||
245 | /* --------------------------------------------------------------------- */ | |
246 | ||
7d12e780 | 247 | static irqreturn_t ser12_interrupt(int irq, void *dev_id) |
1da177e4 LT |
248 | { |
249 | struct net_device *dev = (struct net_device *)dev_id; | |
250 | struct baycom_state *bc = netdev_priv(dev); | |
e6515203 | 251 | struct timespec64 ts; |
1da177e4 LT |
252 | unsigned char iir, msr; |
253 | unsigned int txcount = 0; | |
254 | ||
255 | if (!bc || bc->hdrv.magic != HDLCDRV_MAGIC) | |
256 | return IRQ_NONE; | |
257 | /* fast way out for shared irq */ | |
258 | if ((iir = inb(IIR(dev->base_addr))) & 1) | |
259 | return IRQ_NONE; | |
260 | /* get current time */ | |
e6515203 | 261 | ktime_get_ts64(&ts); |
1da177e4 LT |
262 | msr = inb(MSR(dev->base_addr)); |
263 | /* delta DCD */ | |
264 | if ((msr & 8) && bc->opt_dcd) | |
265 | hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); | |
266 | do { | |
267 | switch (iir & 6) { | |
268 | case 6: | |
269 | inb(LSR(dev->base_addr)); | |
270 | break; | |
271 | ||
272 | case 4: | |
273 | inb(RBR(dev->base_addr)); | |
274 | break; | |
275 | ||
276 | case 2: | |
277 | /* | |
278 | * make sure the next interrupt is generated; | |
279 | * 0 must be used to power the modem; the modem draws its | |
280 | * power from the TxD line | |
281 | */ | |
282 | outb(0x00, THR(dev->base_addr)); | |
283 | baycom_int_freq(bc); | |
284 | txcount++; | |
285 | /* | |
286 | * first output the last bit (!) then call HDLC transmitter, | |
287 | * since this may take quite long | |
288 | */ | |
289 | if (bc->modem.ptt) | |
290 | outb(0x0e | (!!bc->modem.ser12.tx_bit), MCR(dev->base_addr)); | |
291 | else | |
292 | outb(0x0d, MCR(dev->base_addr)); /* transmitter off */ | |
293 | break; | |
294 | ||
295 | default: | |
296 | msr = inb(MSR(dev->base_addr)); | |
297 | /* delta DCD */ | |
298 | if ((msr & 8) && bc->opt_dcd) | |
299 | hdlcdrv_setdcd(&bc->hdrv, !((msr ^ bc->opt_dcd) & 0x80)); | |
300 | break; | |
301 | } | |
302 | iir = inb(IIR(dev->base_addr)); | |
303 | } while (!(iir & 1)); | |
e6515203 | 304 | ser12_rx(dev, bc, &ts, msr & 0x10); /* CTS */ |
1da177e4 LT |
305 | if (bc->modem.ptt && txcount) { |
306 | if (bc->modem.ser12.txshreg <= 1) { | |
307 | bc->modem.ser12.txshreg = 0x10000 | hdlcdrv_getbits(&bc->hdrv); | |
308 | if (!hdlcdrv_ptt(&bc->hdrv)) { | |
309 | ser12_set_divisor(dev, 115200/100/8); | |
310 | bc->modem.ptt = 0; | |
311 | goto end_transmit; | |
312 | } | |
313 | } | |
314 | bc->modem.ser12.tx_bit = !(bc->modem.ser12.tx_bit ^ (bc->modem.ser12.txshreg & 1)); | |
315 | bc->modem.ser12.txshreg >>= 1; | |
316 | } | |
317 | end_transmit: | |
318 | local_irq_enable(); | |
319 | if (!bc->modem.ptt && txcount) { | |
320 | hdlcdrv_arbitrate(dev, &bc->hdrv); | |
321 | if (hdlcdrv_ptt(&bc->hdrv)) { | |
322 | ser12_set_divisor(dev, bc->baud_uartdiv); | |
323 | bc->modem.ser12.txshreg = 1; | |
324 | bc->modem.ptt = 1; | |
325 | } | |
326 | } | |
327 | hdlcdrv_transmitter(dev, &bc->hdrv); | |
328 | hdlcdrv_receiver(dev, &bc->hdrv); | |
329 | local_irq_disable(); | |
330 | return IRQ_HANDLED; | |
331 | } | |
332 | ||
333 | /* --------------------------------------------------------------------- */ | |
334 | ||
335 | enum uart { c_uart_unknown, c_uart_8250, | |
336 | c_uart_16450, c_uart_16550, c_uart_16550A}; | |
337 | static const char *uart_str[] = { | |
338 | "unknown", "8250", "16450", "16550", "16550A" | |
339 | }; | |
340 | ||
341 | static enum uart ser12_check_uart(unsigned int iobase) | |
342 | { | |
343 | unsigned char b1,b2,b3; | |
344 | enum uart u; | |
345 | enum uart uart_tab[] = | |
346 | { c_uart_16450, c_uart_unknown, c_uart_16550, c_uart_16550A }; | |
347 | ||
348 | b1 = inb(MCR(iobase)); | |
349 | outb(b1 | 0x10, MCR(iobase)); /* loopback mode */ | |
350 | b2 = inb(MSR(iobase)); | |
351 | outb(0x1a, MCR(iobase)); | |
352 | b3 = inb(MSR(iobase)) & 0xf0; | |
353 | outb(b1, MCR(iobase)); /* restore old values */ | |
354 | outb(b2, MSR(iobase)); | |
355 | if (b3 != 0x90) | |
356 | return c_uart_unknown; | |
357 | inb(RBR(iobase)); | |
358 | inb(RBR(iobase)); | |
359 | outb(0x01, FCR(iobase)); /* enable FIFOs */ | |
360 | u = uart_tab[(inb(IIR(iobase)) >> 6) & 3]; | |
361 | if (u == c_uart_16450) { | |
362 | outb(0x5a, SCR(iobase)); | |
363 | b1 = inb(SCR(iobase)); | |
364 | outb(0xa5, SCR(iobase)); | |
365 | b2 = inb(SCR(iobase)); | |
366 | if ((b1 != 0x5a) || (b2 != 0xa5)) | |
367 | u = c_uart_8250; | |
368 | } | |
369 | return u; | |
370 | } | |
371 | ||
372 | /* --------------------------------------------------------------------- */ | |
373 | ||
374 | static int ser12_open(struct net_device *dev) | |
375 | { | |
376 | struct baycom_state *bc = netdev_priv(dev); | |
377 | enum uart u; | |
378 | ||
379 | if (!dev || !bc) | |
380 | return -ENXIO; | |
939456ac | 381 | if (!dev->base_addr || dev->base_addr > 0xffff-SER12_EXTENT || |
60e4ad7a | 382 | dev->irq < 2 || dev->irq > nr_irqs) { |
939456ac FH |
383 | printk(KERN_INFO "baycom_ser_fdx: invalid portnumber (max %u) " |
384 | "or irq (2 <= irq <= %d)\n", | |
60e4ad7a | 385 | 0xffff-SER12_EXTENT, nr_irqs); |
1da177e4 | 386 | return -ENXIO; |
939456ac FH |
387 | } |
388 | if (bc->baud < 300 || bc->baud > 4800) { | |
389 | printk(KERN_INFO "baycom_ser_fdx: invalid baudrate " | |
390 | "(300...4800)\n"); | |
1da177e4 | 391 | return -EINVAL; |
939456ac | 392 | } |
1da177e4 | 393 | if (!request_region(dev->base_addr, SER12_EXTENT, "baycom_ser_fdx")) { |
2381a55c | 394 | printk(KERN_WARNING "BAYCOM_SER_FSX: I/O port 0x%04lx busy\n", |
1da177e4 LT |
395 | dev->base_addr); |
396 | return -EACCES; | |
397 | } | |
398 | memset(&bc->modem, 0, sizeof(bc->modem)); | |
399 | bc->hdrv.par.bitrate = bc->baud; | |
400 | bc->baud_us = 1000000/bc->baud; | |
401 | bc->baud_uartdiv = (115200/8)/bc->baud; | |
402 | if ((u = ser12_check_uart(dev->base_addr)) == c_uart_unknown){ | |
403 | release_region(dev->base_addr, SER12_EXTENT); | |
404 | return -EIO; | |
405 | } | |
406 | outb(0, FCR(dev->base_addr)); /* disable FIFOs */ | |
407 | outb(0x0d, MCR(dev->base_addr)); | |
408 | outb(0, IER(dev->base_addr)); | |
44a504c7 | 409 | if (request_irq(dev->irq, ser12_interrupt, IRQF_SHARED, |
1da177e4 LT |
410 | "baycom_ser_fdx", dev)) { |
411 | release_region(dev->base_addr, SER12_EXTENT); | |
412 | return -EBUSY; | |
413 | } | |
414 | /* | |
415 | * set the SIO to 6 Bits/character; during receive, | |
416 | * the baud rate is set to produce 100 ints/sec | |
417 | * to feed the channel arbitration process, | |
418 | * during transmit to baud ints/sec to run | |
419 | * the transmitter | |
420 | */ | |
421 | ser12_set_divisor(dev, 115200/100/8); | |
422 | /* | |
423 | * enable transmitter empty interrupt and modem status interrupt | |
424 | */ | |
425 | outb(0x0a, IER(dev->base_addr)); | |
426 | /* | |
427 | * make sure the next interrupt is generated; | |
428 | * 0 must be used to power the modem; the modem draws its | |
429 | * power from the TxD line | |
430 | */ | |
431 | outb(0x00, THR(dev->base_addr)); | |
432 | hdlcdrv_setdcd(&bc->hdrv, 0); | |
433 | printk(KERN_INFO "%s: ser_fdx at iobase 0x%lx irq %u baud %u uart %s\n", | |
434 | bc_drvname, dev->base_addr, dev->irq, bc->baud, uart_str[u]); | |
435 | return 0; | |
436 | } | |
437 | ||
438 | /* --------------------------------------------------------------------- */ | |
439 | ||
440 | static int ser12_close(struct net_device *dev) | |
441 | { | |
442 | struct baycom_state *bc = netdev_priv(dev); | |
443 | ||
444 | if (!dev || !bc) | |
445 | return -EINVAL; | |
446 | /* | |
447 | * disable interrupts | |
448 | */ | |
449 | outb(0, IER(dev->base_addr)); | |
450 | outb(1, MCR(dev->base_addr)); | |
451 | free_irq(dev->irq, dev); | |
452 | release_region(dev->base_addr, SER12_EXTENT); | |
453 | printk(KERN_INFO "%s: close ser_fdx at iobase 0x%lx irq %u\n", | |
454 | bc_drvname, dev->base_addr, dev->irq); | |
455 | return 0; | |
456 | } | |
457 | ||
458 | /* --------------------------------------------------------------------- */ | |
459 | /* | |
460 | * ===================== hdlcdrv driver interface ========================= | |
461 | */ | |
462 | ||
463 | /* --------------------------------------------------------------------- */ | |
464 | ||
465 | static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, | |
466 | struct hdlcdrv_ioctl *hi, int cmd); | |
467 | ||
468 | /* --------------------------------------------------------------------- */ | |
469 | ||
511aeaf4 | 470 | static const struct hdlcdrv_ops ser12_ops = { |
1da177e4 LT |
471 | .drvname = bc_drvname, |
472 | .drvinfo = bc_drvinfo, | |
473 | .open = ser12_open, | |
474 | .close = ser12_close, | |
475 | .ioctl = baycom_ioctl, | |
476 | }; | |
477 | ||
478 | /* --------------------------------------------------------------------- */ | |
479 | ||
480 | static int baycom_setmode(struct baycom_state *bc, const char *modestr) | |
481 | { | |
482 | unsigned int baud; | |
483 | ||
484 | if (!strncmp(modestr, "ser", 3)) { | |
485 | baud = simple_strtoul(modestr+3, NULL, 10); | |
486 | if (baud >= 3 && baud <= 48) | |
487 | bc->baud = baud*100; | |
488 | } | |
489 | if (strchr(modestr, '*')) | |
490 | bc->opt_dcd = 0; | |
491 | else if (strchr(modestr, '+')) | |
492 | bc->opt_dcd = -1; | |
493 | else | |
494 | bc->opt_dcd = 1; | |
495 | return 0; | |
496 | } | |
497 | ||
498 | /* --------------------------------------------------------------------- */ | |
499 | ||
500 | static int baycom_ioctl(struct net_device *dev, struct ifreq *ifr, | |
501 | struct hdlcdrv_ioctl *hi, int cmd) | |
502 | { | |
503 | struct baycom_state *bc; | |
504 | struct baycom_ioctl bi; | |
505 | ||
506 | if (!dev) | |
507 | return -EINVAL; | |
508 | ||
509 | bc = netdev_priv(dev); | |
510 | BUG_ON(bc->hdrv.magic != HDLCDRV_MAGIC); | |
511 | ||
512 | if (cmd != SIOCDEVPRIVATE) | |
513 | return -ENOIOCTLCMD; | |
514 | switch (hi->cmd) { | |
515 | default: | |
516 | break; | |
517 | ||
518 | case HDLCDRVCTL_GETMODE: | |
519 | sprintf(hi->data.modename, "ser%u", bc->baud / 100); | |
520 | if (bc->opt_dcd <= 0) | |
521 | strcat(hi->data.modename, (!bc->opt_dcd) ? "*" : "+"); | |
522 | if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) | |
523 | return -EFAULT; | |
524 | return 0; | |
525 | ||
526 | case HDLCDRVCTL_SETMODE: | |
527 | if (netif_running(dev) || !capable(CAP_NET_ADMIN)) | |
528 | return -EACCES; | |
529 | hi->data.modename[sizeof(hi->data.modename)-1] = '\0'; | |
530 | return baycom_setmode(bc, hi->data.modename); | |
531 | ||
532 | case HDLCDRVCTL_MODELIST: | |
533 | strcpy(hi->data.modename, "ser12,ser3,ser24"); | |
534 | if (copy_to_user(ifr->ifr_data, hi, sizeof(struct hdlcdrv_ioctl))) | |
535 | return -EFAULT; | |
536 | return 0; | |
537 | ||
538 | case HDLCDRVCTL_MODEMPARMASK: | |
539 | return HDLCDRV_PARMASK_IOBASE | HDLCDRV_PARMASK_IRQ; | |
540 | ||
541 | } | |
542 | ||
543 | if (copy_from_user(&bi, ifr->ifr_data, sizeof(bi))) | |
544 | return -EFAULT; | |
545 | switch (bi.cmd) { | |
546 | default: | |
547 | return -ENOIOCTLCMD; | |
548 | ||
549 | #ifdef BAYCOM_DEBUG | |
550 | case BAYCOMCTL_GETDEBUG: | |
551 | bi.data.dbg.debug1 = bc->hdrv.ptt_keyed; | |
552 | bi.data.dbg.debug2 = bc->debug_vals.last_intcnt; | |
553 | bi.data.dbg.debug3 = bc->debug_vals.last_pllcorr; | |
554 | break; | |
555 | #endif /* BAYCOM_DEBUG */ | |
556 | ||
557 | } | |
558 | if (copy_to_user(ifr->ifr_data, &bi, sizeof(bi))) | |
559 | return -EFAULT; | |
560 | return 0; | |
561 | ||
562 | } | |
563 | ||
564 | /* --------------------------------------------------------------------- */ | |
565 | ||
566 | /* | |
567 | * command line settable parameters | |
568 | */ | |
569 | static char *mode[NR_PORTS] = { "ser12*", }; | |
570 | static int iobase[NR_PORTS] = { 0x3f8, }; | |
571 | static int irq[NR_PORTS] = { 4, }; | |
572 | static int baud[NR_PORTS] = { [0 ... NR_PORTS-1] = 1200 }; | |
573 | ||
574 | module_param_array(mode, charp, NULL, 0); | |
575 | MODULE_PARM_DESC(mode, "baycom operating mode; * for software DCD"); | |
b658e5d8 | 576 | module_param_hw_array(iobase, int, ioport, NULL, 0); |
1da177e4 | 577 | MODULE_PARM_DESC(iobase, "baycom io base address"); |
b658e5d8 | 578 | module_param_hw_array(irq, int, irq, NULL, 0); |
1da177e4 LT |
579 | MODULE_PARM_DESC(irq, "baycom irq number"); |
580 | module_param_array(baud, int, NULL, 0); | |
581 | MODULE_PARM_DESC(baud, "baycom baud rate (300 to 4800)"); | |
582 | ||
583 | MODULE_AUTHOR("Thomas M. Sailer, sailer@ife.ee.ethz.ch, hb9jnx@hb9w.che.eu"); | |
584 | MODULE_DESCRIPTION("Baycom ser12 full duplex amateur radio modem driver"); | |
585 | MODULE_LICENSE("GPL"); | |
586 | ||
587 | /* --------------------------------------------------------------------- */ | |
588 | ||
589 | static int __init init_baycomserfdx(void) | |
590 | { | |
591 | int i, found = 0; | |
592 | char set_hw = 1; | |
593 | ||
594 | printk(bc_drvinfo); | |
595 | /* | |
596 | * register net devices | |
597 | */ | |
598 | for (i = 0; i < NR_PORTS; i++) { | |
599 | struct net_device *dev; | |
600 | struct baycom_state *bc; | |
601 | char ifname[IFNAMSIZ]; | |
602 | ||
603 | sprintf(ifname, "bcsf%d", i); | |
604 | ||
605 | if (!mode[i]) | |
606 | set_hw = 0; | |
607 | if (!set_hw) | |
608 | iobase[i] = irq[i] = 0; | |
609 | ||
610 | dev = hdlcdrv_register(&ser12_ops, | |
611 | sizeof(struct baycom_state), | |
612 | ifname, iobase[i], irq[i], 0); | |
613 | if (IS_ERR(dev)) | |
614 | break; | |
615 | ||
616 | bc = netdev_priv(dev); | |
617 | if (set_hw && baycom_setmode(bc, mode[i])) | |
618 | set_hw = 0; | |
619 | bc->baud = baud[i]; | |
620 | found++; | |
621 | baycom_device[i] = dev; | |
622 | } | |
623 | ||
624 | if (!found) | |
625 | return -ENXIO; | |
626 | return 0; | |
627 | } | |
628 | ||
629 | static void __exit cleanup_baycomserfdx(void) | |
630 | { | |
631 | int i; | |
632 | ||
633 | for(i = 0; i < NR_PORTS; i++) { | |
634 | struct net_device *dev = baycom_device[i]; | |
635 | if (dev) | |
636 | hdlcdrv_unregister(dev); | |
637 | } | |
638 | } | |
639 | ||
640 | module_init(init_baycomserfdx); | |
641 | module_exit(cleanup_baycomserfdx); | |
642 | ||
643 | /* --------------------------------------------------------------------- */ | |
644 | ||
645 | #ifndef MODULE | |
646 | ||
647 | /* | |
648 | * format: baycom_ser_fdx=io,irq,mode | |
649 | * mode: ser# hardware DCD | |
650 | * ser#* software DCD | |
651 | * ser#+ hardware DCD, inverted signal at DCD pin | |
652 | * '#' denotes the baud rate / 100, eg. ser12* is '1200 baud, soft DCD' | |
653 | */ | |
654 | ||
655 | static int __init baycom_ser_fdx_setup(char *str) | |
656 | { | |
657 | static unsigned nr_dev; | |
658 | int ints[4]; | |
659 | ||
660 | if (nr_dev >= NR_PORTS) | |
661 | return 0; | |
662 | str = get_options(str, 4, ints); | |
663 | if (ints[0] < 2) | |
664 | return 0; | |
665 | mode[nr_dev] = str; | |
666 | iobase[nr_dev] = ints[1]; | |
667 | irq[nr_dev] = ints[2]; | |
668 | if (ints[0] >= 3) | |
669 | baud[nr_dev] = ints[3]; | |
670 | nr_dev++; | |
671 | return 1; | |
672 | } | |
673 | ||
674 | __setup("baycom_ser_fdx=", baycom_ser_fdx_setup); | |
675 | ||
676 | #endif /* MODULE */ | |
677 | /* --------------------------------------------------------------------- */ |