Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /*** ltpc.c -- a driver for the LocalTalk PC card. |
2 | * | |
3 | * Copyright (c) 1995,1996 Bradford W. Johnson <johns393@maroon.tc.umn.edu> | |
4 | * | |
5 | * This software may be used and distributed according to the terms | |
6 | * of the GNU General Public License, incorporated herein by reference. | |
7 | * | |
8 | * This is ALPHA code at best. It may not work for you. It may | |
9 | * damage your equipment. It may damage your relations with other | |
10 | * users of your network. Use it at your own risk! | |
11 | * | |
12 | * Based in part on: | |
13 | * skeleton.c by Donald Becker | |
14 | * dummy.c by Nick Holloway and Alan Cox | |
15 | * loopback.c by Ross Biro, Fred van Kampen, Donald Becker | |
16 | * the netatalk source code (UMICH) | |
17 | * lots of work on the card... | |
18 | * | |
19 | * I do not have access to the (proprietary) SDK that goes with the card. | |
20 | * If you do, I don't want to know about it, and you can probably write | |
21 | * a better driver yourself anyway. This does mean that the pieces that | |
22 | * talk to the card are guesswork on my part, so use at your own risk! | |
23 | * | |
24 | * This is my first try at writing Linux networking code, and is also | |
25 | * guesswork. Again, use at your own risk! (Although on this part, I'd | |
26 | * welcome suggestions) | |
27 | * | |
28 | * This is a loadable kernel module which seems to work at my site | |
29 | * consisting of a 1.2.13 linux box running netatalk 1.3.3, and with | |
30 | * the kernel support from 1.3.3b2 including patches routing.patch | |
31 | * and ddp.disappears.from.chooser. In order to run it, you will need | |
32 | * to patch ddp.c and aarp.c in the kernel, but only a little... | |
33 | * | |
34 | * I'm fairly confident that while this is arguably badly written, the | |
35 | * problems that people experience will be "higher level", that is, with | |
36 | * complications in the netatalk code. The driver itself doesn't do | |
37 | * anything terribly complicated -- it pretends to be an ether device | |
38 | * as far as netatalk is concerned, strips the DDP data out of the ether | |
39 | * frame and builds a LLAP packet to send out the card. In the other | |
40 | * direction, it receives LLAP frames from the card and builds a fake | |
41 | * ether packet that it then tosses up to the networking code. You can | |
42 | * argue (correctly) that this is an ugly way to do things, but it | |
43 | * requires a minimal amount of fooling with the code in ddp.c and aarp.c. | |
44 | * | |
45 | * The card will do a lot more than is used here -- I *think* it has the | |
46 | * layers up through ATP. Even if you knew how that part works (which I | |
47 | * don't) it would be a big job to carve up the kernel ddp code to insert | |
48 | * things at a higher level, and probably a bad idea... | |
49 | * | |
50 | * There are a number of other cards that do LocalTalk on the PC. If | |
51 | * nobody finds any insurmountable (at the netatalk level) problems | |
52 | * here, this driver should encourage people to put some work into the | |
53 | * other cards (some of which I gather are still commercially available) | |
54 | * and also to put hooks for LocalTalk into the official ddp code. | |
55 | * | |
56 | * I welcome comments and suggestions. This is my first try at Linux | |
57 | * networking stuff, and there are probably lots of things that I did | |
58 | * suboptimally. | |
59 | * | |
60 | ***/ | |
61 | ||
62 | /*** | |
63 | * | |
64 | * $Log: ltpc.c,v $ | |
65 | * Revision 1.1.2.1 2000/03/01 05:35:07 jgarzik | |
66 | * at and tr cleanup | |
67 | * | |
68 | * Revision 1.8 1997/01/28 05:44:54 bradford | |
69 | * Clean up for non-module a little. | |
70 | * Hacked about a bit to clean things up - Alan Cox | |
71 | * Probably broken it from the origina 1.8 | |
72 | * | |
73 | ||
74 | * 1998/11/09: David Huggins-Daines <dhd@debian.org> | |
75 | * Cleaned up the initialization code to use the standard autoirq methods, | |
76 | and to probe for things in the standard order of i/o, irq, dma. This | |
77 | removes the "reset the reset" hack, because I couldn't figure out an | |
78 | easy way to get the card to trigger an interrupt after it. | |
79 | * Added support for passing configuration parameters on the kernel command | |
80 | line and through insmod | |
81 | * Changed the device name from "ltalk0" to "lt0", both to conform with the | |
82 | other localtalk driver, and to clear up the inconsistency between the | |
83 | module and the non-module versions of the driver :-) | |
84 | * Added a bunch of comments (I was going to make some enums for the state | |
85 | codes and the register offsets, but I'm still not sure exactly what their | |
86 | semantics are) | |
87 | * Don't poll anymore in interrupt-driven mode | |
88 | * It seems to work as a module now (as of 2.1.127), but I don't think | |
89 | I'm responsible for that... | |
90 | ||
91 | * | |
92 | * Revision 1.7 1996/12/12 03:42:33 bradford | |
93 | * DMA alloc cribbed from 3c505.c. | |
94 | * | |
95 | * Revision 1.6 1996/12/12 03:18:58 bradford | |
96 | * Added virt_to_bus; works in 2.1.13. | |
97 | * | |
98 | * Revision 1.5 1996/12/12 03:13:22 root | |
99 | * xmitQel initialization -- think through better though. | |
100 | * | |
101 | * Revision 1.4 1996/06/18 14:55:55 root | |
102 | * Change names to ltpc. Tabs. Took a shot at dma alloc, | |
103 | * although more needs to be done eventually. | |
104 | * | |
105 | * Revision 1.3 1996/05/22 14:59:39 root | |
106 | * Change dev->open, dev->close to track dummy.c in 1.99.(around 7) | |
107 | * | |
108 | * Revision 1.2 1996/05/22 14:58:24 root | |
109 | * Change tabs mostly. | |
110 | * | |
111 | * Revision 1.1 1996/04/23 04:45:09 root | |
112 | * Initial revision | |
113 | * | |
114 | * Revision 0.16 1996/03/05 15:59:56 root | |
115 | * Change ARPHRD_LOCALTLK definition to the "real" one. | |
116 | * | |
117 | * Revision 0.15 1996/03/05 06:28:30 root | |
118 | * Changes for kernel 1.3.70. Still need a few patches to kernel, but | |
119 | * it's getting closer. | |
120 | * | |
121 | * Revision 0.14 1996/02/25 17:38:32 root | |
122 | * More cleanups. Removed query to card on get_stats. | |
123 | * | |
124 | * Revision 0.13 1996/02/21 16:27:40 root | |
125 | * Refix debug_print_skb. Fix mac.raw gotcha that appeared in 1.3.65. | |
126 | * Clean up receive code a little. | |
127 | * | |
128 | * Revision 0.12 1996/02/19 16:34:53 root | |
129 | * Fix debug_print_skb. Kludge outgoing snet to 0 when using startup | |
130 | * range. Change debug to mask: 1 for verbose, 2 for higher level stuff | |
131 | * including packet printing, 4 for lower level (card i/o) stuff. | |
132 | * | |
133 | * Revision 0.11 1996/02/12 15:53:38 root | |
134 | * Added router sends (requires new aarp.c patch) | |
135 | * | |
136 | * Revision 0.10 1996/02/11 00:19:35 root | |
137 | * Change source LTALK_LOGGING debug switch to insmod ... debug=2. | |
138 | * | |
139 | * Revision 0.9 1996/02/10 23:59:35 root | |
140 | * Fixed those fixes for 1.2 -- DANGER! The at.h that comes with netatalk | |
141 | * has a *different* definition of struct sockaddr_at than the Linux kernel | |
142 | * does. This is an "insidious and invidious" bug... | |
143 | * (Actually the preceding comment is false -- it's the atalk.h in the | |
144 | * ancient atalk-0.06 that's the problem) | |
145 | * | |
146 | * Revision 0.8 1996/02/10 19:09:00 root | |
147 | * Merge 1.3 changes. Tested OK under 1.3.60. | |
148 | * | |
149 | * Revision 0.7 1996/02/10 17:56:56 root | |
150 | * Added debug=1 parameter on insmod for debugging prints. Tried | |
151 | * to fix timer unload on rmmod, but I don't think that's the problem. | |
152 | * | |
153 | * Revision 0.6 1995/12/31 19:01:09 root | |
154 | * Clean up rmmod, irq comments per feedback from Corin Anderson (Thanks Corey!) | |
155 | * Clean up initial probing -- sometimes the card wakes up latched in reset. | |
156 | * | |
157 | * Revision 0.5 1995/12/22 06:03:44 root | |
158 | * Added comments in front and cleaned up a bit. | |
159 | * This version sent out to people. | |
160 | * | |
161 | * Revision 0.4 1995/12/18 03:46:44 root | |
162 | * Return shortDDP to longDDP fake to 0/0. Added command structs. | |
163 | * | |
164 | ***/ | |
165 | ||
166 | /* ltpc jumpers are: | |
167 | * | |
168 | * Interrupts -- set at most one. If none are set, the driver uses | |
169 | * polled mode. Because the card was developed in the XT era, the | |
170 | * original documentation refers to IRQ2. Since you'll be running | |
171 | * this on an AT (or later) class machine, that really means IRQ9. | |
172 | * | |
173 | * SW1 IRQ 4 | |
174 | * SW2 IRQ 3 | |
175 | * SW3 IRQ 9 (2 in original card documentation only applies to XT) | |
176 | * | |
177 | * | |
178 | * DMA -- choose DMA 1 or 3, and set both corresponding switches. | |
179 | * | |
180 | * SW4 DMA 3 | |
181 | * SW5 DMA 1 | |
182 | * SW6 DMA 3 | |
183 | * SW7 DMA 1 | |
184 | * | |
185 | * | |
186 | * I/O address -- choose one. | |
187 | * | |
188 | * SW8 220 / 240 | |
189 | */ | |
190 | ||
191 | /* To have some stuff logged, do | |
192 | * insmod ltpc.o debug=1 | |
193 | * | |
194 | * For a whole bunch of stuff, use higher numbers. | |
195 | * | |
196 | * The default is 0, i.e. no messages except for the probe results. | |
197 | */ | |
198 | ||
199 | /* insmod-tweakable variables */ | |
200 | static int debug; | |
201 | #define DEBUG_VERBOSE 1 | |
202 | #define DEBUG_UPPER 2 | |
203 | #define DEBUG_LOWER 4 | |
204 | ||
205 | static int io; | |
206 | static int irq; | |
207 | static int dma; | |
208 | ||
209 | #include <linux/module.h> | |
210 | #include <linux/kernel.h> | |
211 | #include <linux/types.h> | |
212 | #include <linux/fcntl.h> | |
213 | #include <linux/interrupt.h> | |
214 | #include <linux/ptrace.h> | |
215 | #include <linux/ioport.h> | |
216 | #include <linux/spinlock.h> | |
217 | #include <linux/in.h> | |
218 | #include <linux/slab.h> | |
219 | #include <linux/string.h> | |
220 | #include <linux/errno.h> | |
221 | #include <linux/init.h> | |
222 | #include <linux/netdevice.h> | |
223 | #include <linux/etherdevice.h> | |
224 | #include <linux/skbuff.h> | |
225 | #include <linux/if_arp.h> | |
226 | #include <linux/if_ltalk.h> | |
227 | #include <linux/delay.h> | |
228 | #include <linux/timer.h> | |
229 | #include <linux/atalk.h> | |
230 | #include <linux/bitops.h> | |
231 | ||
232 | #include <asm/system.h> | |
233 | #include <asm/dma.h> | |
234 | #include <asm/io.h> | |
235 | ||
236 | /* our stuff */ | |
237 | #include "ltpc.h" | |
238 | ||
239 | static DEFINE_SPINLOCK(txqueue_lock); | |
240 | static DEFINE_SPINLOCK(mbox_lock); | |
241 | ||
242 | /* function prototypes */ | |
243 | static int do_read(struct net_device *dev, void *cbuf, int cbuflen, | |
244 | void *dbuf, int dbuflen); | |
245 | static int sendup_buffer (struct net_device *dev); | |
246 | ||
247 | /* Dma Memory related stuff, cribbed directly from 3c505.c */ | |
248 | ||
249 | static unsigned long dma_mem_alloc(int size) | |
250 | { | |
251 | int order = get_order(size); | |
252 | ||
253 | return __get_dma_pages(GFP_KERNEL, order); | |
254 | } | |
255 | ||
256 | /* DMA data buffer, DMA command buffer */ | |
257 | static unsigned char *ltdmabuf; | |
258 | static unsigned char *ltdmacbuf; | |
259 | ||
260 | /* private struct, holds our appletalk address */ | |
261 | ||
262 | struct ltpc_private | |
263 | { | |
264 | struct net_device_stats stats; | |
265 | struct atalk_addr my_addr; | |
266 | }; | |
267 | ||
268 | /* transmit queue element struct */ | |
269 | ||
270 | struct xmitQel { | |
271 | struct xmitQel *next; | |
272 | /* command buffer */ | |
273 | unsigned char *cbuf; | |
274 | short cbuflen; | |
275 | /* data buffer */ | |
276 | unsigned char *dbuf; | |
277 | short dbuflen; | |
278 | unsigned char QWrite; /* read or write data */ | |
279 | unsigned char mailbox; | |
280 | }; | |
281 | ||
282 | /* the transmit queue itself */ | |
283 | ||
284 | static struct xmitQel *xmQhd, *xmQtl; | |
285 | ||
286 | static void enQ(struct xmitQel *qel) | |
287 | { | |
288 | unsigned long flags; | |
289 | qel->next = NULL; | |
290 | ||
291 | spin_lock_irqsave(&txqueue_lock, flags); | |
292 | if (xmQtl) { | |
293 | xmQtl->next = qel; | |
294 | } else { | |
295 | xmQhd = qel; | |
296 | } | |
297 | xmQtl = qel; | |
298 | spin_unlock_irqrestore(&txqueue_lock, flags); | |
299 | ||
300 | if (debug & DEBUG_LOWER) | |
301 | printk("enqueued a 0x%02x command\n",qel->cbuf[0]); | |
302 | } | |
303 | ||
304 | static struct xmitQel *deQ(void) | |
305 | { | |
306 | unsigned long flags; | |
307 | int i; | |
308 | struct xmitQel *qel=NULL; | |
309 | ||
310 | spin_lock_irqsave(&txqueue_lock, flags); | |
311 | if (xmQhd) { | |
312 | qel = xmQhd; | |
313 | xmQhd = qel->next; | |
314 | if(!xmQhd) xmQtl = NULL; | |
315 | } | |
316 | spin_unlock_irqrestore(&txqueue_lock, flags); | |
317 | ||
318 | if ((debug & DEBUG_LOWER) && qel) { | |
319 | int n; | |
320 | printk(KERN_DEBUG "ltpc: dequeued command "); | |
321 | n = qel->cbuflen; | |
322 | if (n>100) n=100; | |
323 | for(i=0;i<n;i++) printk("%02x ",qel->cbuf[i]); | |
324 | printk("\n"); | |
325 | } | |
326 | ||
327 | return qel; | |
328 | } | |
329 | ||
330 | /* and... the queue elements we'll be using */ | |
331 | static struct xmitQel qels[16]; | |
332 | ||
333 | /* and their corresponding mailboxes */ | |
334 | static unsigned char mailbox[16]; | |
335 | static unsigned char mboxinuse[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}; | |
336 | ||
337 | static int wait_timeout(struct net_device *dev, int c) | |
338 | { | |
339 | /* returns true if it stayed c */ | |
340 | /* this uses base+6, but it's ok */ | |
341 | int i; | |
342 | ||
343 | /* twenty second or so total */ | |
344 | ||
345 | for(i=0;i<200000;i++) { | |
346 | if ( c != inb_p(dev->base_addr+6) ) return 0; | |
347 | udelay(100); | |
348 | } | |
349 | return 1; /* timed out */ | |
350 | } | |
351 | ||
352 | /* get the first free mailbox */ | |
353 | ||
354 | static int getmbox(void) | |
355 | { | |
356 | unsigned long flags; | |
357 | int i; | |
358 | ||
359 | spin_lock_irqsave(&mbox_lock, flags); | |
360 | for(i=1;i<16;i++) if(!mboxinuse[i]) { | |
361 | mboxinuse[i]=1; | |
362 | spin_unlock_irqrestore(&mbox_lock, flags); | |
363 | return i; | |
364 | } | |
365 | spin_unlock_irqrestore(&mbox_lock, flags); | |
366 | return 0; | |
367 | } | |
368 | ||
369 | /* read a command from the card */ | |
370 | static void handlefc(struct net_device *dev) | |
371 | { | |
372 | /* called *only* from idle, non-reentrant */ | |
373 | int dma = dev->dma; | |
374 | int base = dev->base_addr; | |
375 | unsigned long flags; | |
376 | ||
377 | ||
378 | flags=claim_dma_lock(); | |
379 | disable_dma(dma); | |
380 | clear_dma_ff(dma); | |
381 | set_dma_mode(dma,DMA_MODE_READ); | |
382 | set_dma_addr(dma,virt_to_bus(ltdmacbuf)); | |
383 | set_dma_count(dma,50); | |
384 | enable_dma(dma); | |
385 | release_dma_lock(flags); | |
386 | ||
387 | inb_p(base+3); | |
388 | inb_p(base+2); | |
389 | ||
390 | if ( wait_timeout(dev,0xfc) ) printk("timed out in handlefc\n"); | |
391 | } | |
392 | ||
393 | /* read data from the card */ | |
394 | static void handlefd(struct net_device *dev) | |
395 | { | |
396 | int dma = dev->dma; | |
397 | int base = dev->base_addr; | |
398 | unsigned long flags; | |
399 | ||
400 | flags=claim_dma_lock(); | |
401 | disable_dma(dma); | |
402 | clear_dma_ff(dma); | |
403 | set_dma_mode(dma,DMA_MODE_READ); | |
404 | set_dma_addr(dma,virt_to_bus(ltdmabuf)); | |
405 | set_dma_count(dma,800); | |
406 | enable_dma(dma); | |
407 | release_dma_lock(flags); | |
408 | ||
409 | inb_p(base+3); | |
410 | inb_p(base+2); | |
411 | ||
412 | if ( wait_timeout(dev,0xfd) ) printk("timed out in handlefd\n"); | |
413 | sendup_buffer(dev); | |
414 | } | |
415 | ||
416 | static void handlewrite(struct net_device *dev) | |
417 | { | |
418 | /* called *only* from idle, non-reentrant */ | |
419 | /* on entry, 0xfb and ltdmabuf holds data */ | |
420 | int dma = dev->dma; | |
421 | int base = dev->base_addr; | |
422 | unsigned long flags; | |
423 | ||
424 | flags=claim_dma_lock(); | |
425 | disable_dma(dma); | |
426 | clear_dma_ff(dma); | |
427 | set_dma_mode(dma,DMA_MODE_WRITE); | |
428 | set_dma_addr(dma,virt_to_bus(ltdmabuf)); | |
429 | set_dma_count(dma,800); | |
430 | enable_dma(dma); | |
431 | release_dma_lock(flags); | |
432 | ||
433 | inb_p(base+3); | |
434 | inb_p(base+2); | |
435 | ||
436 | if ( wait_timeout(dev,0xfb) ) { | |
437 | flags=claim_dma_lock(); | |
438 | printk("timed out in handlewrite, dma res %d\n", | |
439 | get_dma_residue(dev->dma) ); | |
440 | release_dma_lock(flags); | |
441 | } | |
442 | } | |
443 | ||
444 | static void handleread(struct net_device *dev) | |
445 | { | |
446 | /* on entry, 0xfb */ | |
447 | /* on exit, ltdmabuf holds data */ | |
448 | int dma = dev->dma; | |
449 | int base = dev->base_addr; | |
450 | unsigned long flags; | |
451 | ||
452 | ||
453 | flags=claim_dma_lock(); | |
454 | disable_dma(dma); | |
455 | clear_dma_ff(dma); | |
456 | set_dma_mode(dma,DMA_MODE_READ); | |
457 | set_dma_addr(dma,virt_to_bus(ltdmabuf)); | |
458 | set_dma_count(dma,800); | |
459 | enable_dma(dma); | |
460 | release_dma_lock(flags); | |
461 | ||
462 | inb_p(base+3); | |
463 | inb_p(base+2); | |
464 | if ( wait_timeout(dev,0xfb) ) printk("timed out in handleread\n"); | |
465 | } | |
466 | ||
467 | static void handlecommand(struct net_device *dev) | |
468 | { | |
469 | /* on entry, 0xfa and ltdmacbuf holds command */ | |
470 | int dma = dev->dma; | |
471 | int base = dev->base_addr; | |
472 | unsigned long flags; | |
473 | ||
474 | flags=claim_dma_lock(); | |
475 | disable_dma(dma); | |
476 | clear_dma_ff(dma); | |
477 | set_dma_mode(dma,DMA_MODE_WRITE); | |
478 | set_dma_addr(dma,virt_to_bus(ltdmacbuf)); | |
479 | set_dma_count(dma,50); | |
480 | enable_dma(dma); | |
481 | release_dma_lock(flags); | |
482 | inb_p(base+3); | |
483 | inb_p(base+2); | |
484 | if ( wait_timeout(dev,0xfa) ) printk("timed out in handlecommand\n"); | |
485 | } | |
486 | ||
487 | /* ready made command for getting the result from the card */ | |
488 | static unsigned char rescbuf[2] = {LT_GETRESULT,0}; | |
489 | static unsigned char resdbuf[2]; | |
490 | ||
491 | static int QInIdle; | |
492 | ||
493 | /* idle expects to be called with the IRQ line high -- either because of | |
494 | * an interrupt, or because the line is tri-stated | |
495 | */ | |
496 | ||
497 | static void idle(struct net_device *dev) | |
498 | { | |
499 | unsigned long flags; | |
500 | int state; | |
501 | /* FIXME This is initialized to shut the warning up, but I need to | |
502 | * think this through again. | |
503 | */ | |
504 | struct xmitQel *q = NULL; | |
505 | int oops; | |
506 | int i; | |
507 | int base = dev->base_addr; | |
508 | ||
509 | spin_lock_irqsave(&txqueue_lock, flags); | |
510 | if(QInIdle) { | |
511 | spin_unlock_irqrestore(&txqueue_lock, flags); | |
512 | return; | |
513 | } | |
514 | QInIdle = 1; | |
515 | spin_unlock_irqrestore(&txqueue_lock, flags); | |
516 | ||
517 | /* this tri-states the IRQ line */ | |
518 | (void) inb_p(base+6); | |
519 | ||
520 | oops = 100; | |
521 | ||
522 | loop: | |
523 | if (0>oops--) { | |
524 | printk("idle: looped too many times\n"); | |
525 | goto done; | |
526 | } | |
527 | ||
528 | state = inb_p(base+6); | |
529 | if (state != inb_p(base+6)) goto loop; | |
530 | ||
531 | switch(state) { | |
532 | case 0xfc: | |
533 | /* incoming command */ | |
534 | if (debug & DEBUG_LOWER) printk("idle: fc\n"); | |
535 | handlefc(dev); | |
536 | break; | |
537 | case 0xfd: | |
538 | /* incoming data */ | |
539 | if(debug & DEBUG_LOWER) printk("idle: fd\n"); | |
540 | handlefd(dev); | |
541 | break; | |
542 | case 0xf9: | |
543 | /* result ready */ | |
544 | if (debug & DEBUG_LOWER) printk("idle: f9\n"); | |
545 | if(!mboxinuse[0]) { | |
546 | mboxinuse[0] = 1; | |
547 | qels[0].cbuf = rescbuf; | |
548 | qels[0].cbuflen = 2; | |
549 | qels[0].dbuf = resdbuf; | |
550 | qels[0].dbuflen = 2; | |
551 | qels[0].QWrite = 0; | |
552 | qels[0].mailbox = 0; | |
553 | enQ(&qels[0]); | |
554 | } | |
555 | inb_p(dev->base_addr+1); | |
556 | inb_p(dev->base_addr+0); | |
557 | if( wait_timeout(dev,0xf9) ) | |
558 | printk("timed out idle f9\n"); | |
559 | break; | |
560 | case 0xf8: | |
561 | /* ?? */ | |
562 | if (xmQhd) { | |
563 | inb_p(dev->base_addr+1); | |
564 | inb_p(dev->base_addr+0); | |
565 | if(wait_timeout(dev,0xf8) ) | |
566 | printk("timed out idle f8\n"); | |
567 | } else { | |
568 | goto done; | |
569 | } | |
570 | break; | |
571 | case 0xfa: | |
572 | /* waiting for command */ | |
573 | if(debug & DEBUG_LOWER) printk("idle: fa\n"); | |
574 | if (xmQhd) { | |
575 | q=deQ(); | |
576 | memcpy(ltdmacbuf,q->cbuf,q->cbuflen); | |
577 | ltdmacbuf[1] = q->mailbox; | |
578 | if (debug>1) { | |
579 | int n; | |
580 | printk("ltpc: sent command "); | |
581 | n = q->cbuflen; | |
582 | if (n>100) n=100; | |
583 | for(i=0;i<n;i++) | |
584 | printk("%02x ",ltdmacbuf[i]); | |
585 | printk("\n"); | |
586 | } | |
587 | handlecommand(dev); | |
588 | if(0xfa==inb_p(base+6)) { | |
589 | /* we timed out, so return */ | |
590 | goto done; | |
591 | } | |
592 | } else { | |
593 | /* we don't seem to have a command */ | |
594 | if (!mboxinuse[0]) { | |
595 | mboxinuse[0] = 1; | |
596 | qels[0].cbuf = rescbuf; | |
597 | qels[0].cbuflen = 2; | |
598 | qels[0].dbuf = resdbuf; | |
599 | qels[0].dbuflen = 2; | |
600 | qels[0].QWrite = 0; | |
601 | qels[0].mailbox = 0; | |
602 | enQ(&qels[0]); | |
603 | } else { | |
604 | printk("trouble: response command already queued\n"); | |
605 | goto done; | |
606 | } | |
607 | } | |
608 | break; | |
609 | case 0Xfb: | |
610 | /* data transfer ready */ | |
611 | if(debug & DEBUG_LOWER) printk("idle: fb\n"); | |
612 | if(q->QWrite) { | |
613 | memcpy(ltdmabuf,q->dbuf,q->dbuflen); | |
614 | handlewrite(dev); | |
615 | } else { | |
616 | handleread(dev); | |
617 | /* non-zero mailbox numbers are for | |
618 | commmands, 0 is for GETRESULT | |
619 | requests */ | |
620 | if(q->mailbox) { | |
621 | memcpy(q->dbuf,ltdmabuf,q->dbuflen); | |
622 | } else { | |
623 | /* this was a result */ | |
624 | mailbox[ 0x0f & ltdmabuf[0] ] = ltdmabuf[1]; | |
625 | mboxinuse[0]=0; | |
626 | } | |
627 | } | |
628 | break; | |
629 | } | |
630 | goto loop; | |
631 | ||
632 | done: | |
633 | QInIdle=0; | |
634 | ||
635 | /* now set the interrupts back as appropriate */ | |
636 | /* the first read takes it out of tri-state (but still high) */ | |
637 | /* the second resets it */ | |
638 | /* note that after this point, any read of base+6 will | |
639 | trigger an interrupt */ | |
640 | ||
641 | if (dev->irq) { | |
642 | inb_p(base+7); | |
643 | inb_p(base+7); | |
644 | } | |
645 | return; | |
646 | } | |
647 | ||
648 | ||
649 | static int do_write(struct net_device *dev, void *cbuf, int cbuflen, | |
650 | void *dbuf, int dbuflen) | |
651 | { | |
652 | ||
653 | int i = getmbox(); | |
654 | int ret; | |
655 | ||
656 | if(i) { | |
657 | qels[i].cbuf = (unsigned char *) cbuf; | |
658 | qels[i].cbuflen = cbuflen; | |
659 | qels[i].dbuf = (unsigned char *) dbuf; | |
660 | qels[i].dbuflen = dbuflen; | |
661 | qels[i].QWrite = 1; | |
662 | qels[i].mailbox = i; /* this should be initted rather */ | |
663 | enQ(&qels[i]); | |
664 | idle(dev); | |
665 | ret = mailbox[i]; | |
666 | mboxinuse[i]=0; | |
667 | return ret; | |
668 | } | |
669 | printk("ltpc: could not allocate mbox\n"); | |
670 | return -1; | |
671 | } | |
672 | ||
673 | static int do_read(struct net_device *dev, void *cbuf, int cbuflen, | |
674 | void *dbuf, int dbuflen) | |
675 | { | |
676 | ||
677 | int i = getmbox(); | |
678 | int ret; | |
679 | ||
680 | if(i) { | |
681 | qels[i].cbuf = (unsigned char *) cbuf; | |
682 | qels[i].cbuflen = cbuflen; | |
683 | qels[i].dbuf = (unsigned char *) dbuf; | |
684 | qels[i].dbuflen = dbuflen; | |
685 | qels[i].QWrite = 0; | |
686 | qels[i].mailbox = i; /* this should be initted rather */ | |
687 | enQ(&qels[i]); | |
688 | idle(dev); | |
689 | ret = mailbox[i]; | |
690 | mboxinuse[i]=0; | |
691 | return ret; | |
692 | } | |
693 | printk("ltpc: could not allocate mbox\n"); | |
694 | return -1; | |
695 | } | |
696 | ||
697 | /* end of idle handlers -- what should be seen is do_read, do_write */ | |
698 | ||
699 | static struct timer_list ltpc_timer; | |
700 | ||
701 | static int ltpc_xmit(struct sk_buff *skb, struct net_device *dev); | |
702 | static struct net_device_stats *ltpc_get_stats(struct net_device *dev); | |
703 | ||
704 | static int read_30 ( struct net_device *dev) | |
705 | { | |
706 | lt_command c; | |
707 | c.getflags.command = LT_GETFLAGS; | |
708 | return do_read(dev, &c, sizeof(c.getflags),&c,0); | |
709 | } | |
710 | ||
711 | static int set_30 (struct net_device *dev,int x) | |
712 | { | |
713 | lt_command c; | |
714 | c.setflags.command = LT_SETFLAGS; | |
715 | c.setflags.flags = x; | |
716 | return do_write(dev, &c, sizeof(c.setflags),&c,0); | |
717 | } | |
718 | ||
719 | /* LLAP to DDP translation */ | |
720 | ||
721 | static int sendup_buffer (struct net_device *dev) | |
722 | { | |
723 | /* on entry, command is in ltdmacbuf, data in ltdmabuf */ | |
724 | /* called from idle, non-reentrant */ | |
725 | ||
726 | int dnode, snode, llaptype, len; | |
727 | int sklen; | |
728 | struct sk_buff *skb; | |
729 | struct net_device_stats *stats = &((struct ltpc_private *)dev->priv)->stats; | |
730 | struct lt_rcvlap *ltc = (struct lt_rcvlap *) ltdmacbuf; | |
731 | ||
732 | if (ltc->command != LT_RCVLAP) { | |
733 | printk("unknown command 0x%02x from ltpc card\n",ltc->command); | |
734 | return(-1); | |
735 | } | |
736 | dnode = ltc->dnode; | |
737 | snode = ltc->snode; | |
738 | llaptype = ltc->laptype; | |
739 | len = ltc->length; | |
740 | ||
741 | sklen = len; | |
742 | if (llaptype == 1) | |
743 | sklen += 8; /* correct for short ddp */ | |
744 | if(sklen > 800) { | |
745 | printk(KERN_INFO "%s: nonsense length in ltpc command 0x14: 0x%08x\n", | |
746 | dev->name,sklen); | |
747 | return -1; | |
748 | } | |
749 | ||
750 | if ( (llaptype==0) || (llaptype>2) ) { | |
751 | printk(KERN_INFO "%s: unknown LLAP type: %d\n",dev->name,llaptype); | |
752 | return -1; | |
753 | } | |
754 | ||
755 | ||
756 | skb = dev_alloc_skb(3+sklen); | |
757 | if (skb == NULL) | |
758 | { | |
759 | printk("%s: dropping packet due to memory squeeze.\n", | |
760 | dev->name); | |
761 | return -1; | |
762 | } | |
763 | skb->dev = dev; | |
764 | ||
765 | if (sklen > len) | |
766 | skb_reserve(skb,8); | |
767 | skb_put(skb,len+3); | |
768 | skb->protocol = htons(ETH_P_LOCALTALK); | |
769 | /* add LLAP header */ | |
770 | skb->data[0] = dnode; | |
771 | skb->data[1] = snode; | |
772 | skb->data[2] = llaptype; | |
773 | skb->mac.raw = skb->data; /* save pointer to llap header */ | |
774 | skb_pull(skb,3); | |
775 | ||
776 | /* copy ddp(s,e)hdr + contents */ | |
777 | memcpy(skb->data,(void*)ltdmabuf,len); | |
778 | ||
779 | skb->h.raw = skb->data; | |
780 | ||
781 | stats->rx_packets++; | |
782 | stats->rx_bytes+=skb->len; | |
783 | ||
784 | /* toss it onwards */ | |
785 | netif_rx(skb); | |
786 | dev->last_rx = jiffies; | |
787 | return 0; | |
788 | } | |
789 | ||
790 | /* the handler for the board interrupt */ | |
791 | ||
792 | static irqreturn_t | |
793 | ltpc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr) | |
794 | { | |
795 | struct net_device *dev = dev_id; | |
796 | ||
797 | if (dev==NULL) { | |
798 | printk("ltpc_interrupt: unknown device.\n"); | |
799 | return IRQ_NONE; | |
800 | } | |
801 | ||
802 | inb_p(dev->base_addr+6); /* disable further interrupts from board */ | |
803 | ||
804 | idle(dev); /* handle whatever is coming in */ | |
805 | ||
806 | /* idle re-enables interrupts from board */ | |
807 | ||
808 | return IRQ_HANDLED; | |
809 | } | |
810 | ||
811 | /*** | |
812 | * | |
813 | * The ioctls that the driver responds to are: | |
814 | * | |
815 | * SIOCSIFADDR -- do probe using the passed node hint. | |
816 | * SIOCGIFADDR -- return net, node. | |
817 | * | |
818 | * some of this stuff should be done elsewhere. | |
819 | * | |
820 | ***/ | |
821 | ||
822 | static int ltpc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
823 | { | |
824 | struct sockaddr_at *sa = (struct sockaddr_at *) &ifr->ifr_addr; | |
825 | /* we'll keep the localtalk node address in dev->pa_addr */ | |
826 | struct atalk_addr *aa = &((struct ltpc_private *)dev->priv)->my_addr; | |
827 | struct lt_init c; | |
828 | int ltflags; | |
829 | ||
830 | if(debug & DEBUG_VERBOSE) printk("ltpc_ioctl called\n"); | |
831 | ||
832 | switch(cmd) { | |
833 | case SIOCSIFADDR: | |
834 | ||
835 | aa->s_net = sa->sat_addr.s_net; | |
836 | ||
837 | /* this does the probe and returns the node addr */ | |
838 | c.command = LT_INIT; | |
839 | c.hint = sa->sat_addr.s_node; | |
840 | ||
841 | aa->s_node = do_read(dev,&c,sizeof(c),&c,0); | |
842 | ||
843 | /* get all llap frames raw */ | |
844 | ltflags = read_30(dev); | |
845 | ltflags |= LT_FLAG_ALLLAP; | |
846 | set_30 (dev,ltflags); | |
847 | ||
848 | dev->broadcast[0] = 0xFF; | |
849 | dev->dev_addr[0] = aa->s_node; | |
850 | ||
851 | dev->addr_len=1; | |
852 | ||
853 | return 0; | |
854 | ||
855 | case SIOCGIFADDR: | |
856 | ||
857 | sa->sat_addr.s_net = aa->s_net; | |
858 | sa->sat_addr.s_node = aa->s_node; | |
859 | ||
860 | return 0; | |
861 | ||
862 | default: | |
863 | return -EINVAL; | |
864 | } | |
865 | } | |
866 | ||
867 | static void set_multicast_list(struct net_device *dev) | |
868 | { | |
869 | /* This needs to be present to keep netatalk happy. */ | |
870 | /* Actually netatalk needs fixing! */ | |
871 | } | |
872 | ||
873 | static int ltpc_hard_header (struct sk_buff *skb, struct net_device *dev, | |
874 | unsigned short type, void *daddr, void *saddr, unsigned len) | |
875 | { | |
876 | if(debug & DEBUG_VERBOSE) | |
877 | printk("ltpc_hard_header called for device %s\n", | |
878 | dev->name); | |
879 | return 0; | |
880 | } | |
881 | ||
882 | static int ltpc_poll_counter; | |
883 | ||
884 | static void ltpc_poll(unsigned long l) | |
885 | { | |
886 | struct net_device *dev = (struct net_device *) l; | |
887 | ||
888 | del_timer(<pc_timer); | |
889 | ||
890 | if(debug & DEBUG_VERBOSE) { | |
891 | if (!ltpc_poll_counter) { | |
892 | ltpc_poll_counter = 50; | |
893 | printk("ltpc poll is alive\n"); | |
894 | } | |
895 | ltpc_poll_counter--; | |
896 | } | |
897 | ||
898 | if (!dev) | |
899 | return; /* we've been downed */ | |
900 | ||
901 | /* poll 20 times per second */ | |
902 | idle(dev); | |
903 | ltpc_timer.expires = jiffies + HZ/20; | |
904 | ||
905 | add_timer(<pc_timer); | |
906 | } | |
907 | ||
908 | /* DDP to LLAP translation */ | |
909 | ||
910 | static int ltpc_xmit(struct sk_buff *skb, struct net_device *dev) | |
911 | { | |
912 | /* in kernel 1.3.xx, on entry skb->data points to ddp header, | |
913 | * and skb->len is the length of the ddp data + ddp header | |
914 | */ | |
915 | ||
916 | struct net_device_stats *stats = &((struct ltpc_private *)dev->priv)->stats; | |
917 | ||
918 | int i; | |
919 | struct lt_sendlap cbuf; | |
920 | ||
921 | cbuf.command = LT_SENDLAP; | |
922 | cbuf.dnode = skb->data[0]; | |
923 | cbuf.laptype = skb->data[2]; | |
924 | skb_pull(skb,3); /* skip past LLAP header */ | |
925 | cbuf.length = skb->len; /* this is host order */ | |
926 | skb->h.raw=skb->data; | |
927 | ||
928 | if(debug & DEBUG_UPPER) { | |
929 | printk("command "); | |
930 | for(i=0;i<6;i++) | |
931 | printk("%02x ",((unsigned char *)&cbuf)[i]); | |
932 | printk("\n"); | |
933 | } | |
934 | ||
935 | do_write(dev,&cbuf,sizeof(cbuf),skb->h.raw,skb->len); | |
936 | ||
937 | if(debug & DEBUG_UPPER) { | |
938 | printk("sent %d ddp bytes\n",skb->len); | |
939 | for(i=0;i<skb->len;i++) printk("%02x ",skb->h.raw[i]); | |
940 | printk("\n"); | |
941 | } | |
942 | ||
943 | stats->tx_packets++; | |
944 | stats->tx_bytes+=skb->len; | |
945 | ||
946 | dev_kfree_skb(skb); | |
947 | return 0; | |
948 | } | |
949 | ||
950 | static struct net_device_stats *ltpc_get_stats(struct net_device *dev) | |
951 | { | |
952 | struct net_device_stats *stats = &((struct ltpc_private *) dev->priv)->stats; | |
953 | return stats; | |
954 | } | |
955 | ||
956 | /* initialization stuff */ | |
957 | ||
958 | static int __init ltpc_probe_dma(int base, int dma) | |
959 | { | |
960 | int want = (dma == 3) ? 2 : (dma == 1) ? 1 : 3; | |
961 | unsigned long timeout; | |
962 | unsigned long f; | |
963 | ||
964 | if (want & 1) { | |
965 | if (request_dma(1,"ltpc")) { | |
966 | want &= ~1; | |
967 | } else { | |
968 | f=claim_dma_lock(); | |
969 | disable_dma(1); | |
970 | clear_dma_ff(1); | |
971 | set_dma_mode(1,DMA_MODE_WRITE); | |
972 | set_dma_addr(1,virt_to_bus(ltdmabuf)); | |
973 | set_dma_count(1,sizeof(struct lt_mem)); | |
974 | enable_dma(1); | |
975 | release_dma_lock(f); | |
976 | } | |
977 | } | |
978 | if (want & 2) { | |
979 | if (request_dma(3,"ltpc")) { | |
980 | want &= ~2; | |
981 | } else { | |
982 | f=claim_dma_lock(); | |
983 | disable_dma(3); | |
984 | clear_dma_ff(3); | |
985 | set_dma_mode(3,DMA_MODE_WRITE); | |
986 | set_dma_addr(3,virt_to_bus(ltdmabuf)); | |
987 | set_dma_count(3,sizeof(struct lt_mem)); | |
988 | enable_dma(3); | |
989 | release_dma_lock(f); | |
990 | } | |
991 | } | |
992 | /* set up request */ | |
993 | ||
994 | /* FIXME -- do timings better! */ | |
995 | ||
996 | ltdmabuf[0] = LT_READMEM; | |
997 | ltdmabuf[1] = 1; /* mailbox */ | |
998 | ltdmabuf[2] = 0; ltdmabuf[3] = 0; /* address */ | |
999 | ltdmabuf[4] = 0; ltdmabuf[5] = 1; /* read 0x0100 bytes */ | |
1000 | ltdmabuf[6] = 0; /* dunno if this is necessary */ | |
1001 | ||
1002 | inb_p(io+1); | |
1003 | inb_p(io+0); | |
1004 | timeout = jiffies+100*HZ/100; | |
1005 | while(time_before(jiffies, timeout)) { | |
1006 | if ( 0xfa == inb_p(io+6) ) break; | |
1007 | } | |
1008 | ||
1009 | inb_p(io+3); | |
1010 | inb_p(io+2); | |
1011 | while(time_before(jiffies, timeout)) { | |
1012 | if ( 0xfb == inb_p(io+6) ) break; | |
1013 | } | |
1014 | ||
1015 | /* release the other dma channel (if we opened both of them) */ | |
1016 | ||
1017 | if ((want & 2) && (get_dma_residue(3)==sizeof(struct lt_mem))) { | |
1018 | want &= ~2; | |
1019 | free_dma(3); | |
1020 | } | |
1021 | ||
1022 | if ((want & 1) && (get_dma_residue(1)==sizeof(struct lt_mem))) { | |
1023 | want &= ~1; | |
1024 | free_dma(1); | |
1025 | } | |
1026 | ||
1027 | if (!want) | |
1028 | return 0; | |
1029 | ||
1030 | return (want & 2) ? 3 : 1; | |
1031 | } | |
1032 | ||
1033 | struct net_device * __init ltpc_probe(void) | |
1034 | { | |
1035 | struct net_device *dev; | |
1036 | int err = -ENOMEM; | |
1037 | int x=0,y=0; | |
1038 | int autoirq; | |
1039 | unsigned long f; | |
1040 | unsigned long timeout; | |
1041 | ||
1042 | dev = alloc_netdev(sizeof(struct ltpc_private), "lt%d", ltalk_setup); | |
1043 | if (!dev) | |
1044 | goto out; | |
1045 | ||
1046 | SET_MODULE_OWNER(dev); | |
1047 | ||
1048 | /* probe for the I/O port address */ | |
1049 | ||
1050 | if (io != 0x240 && request_region(0x220,8,"ltpc")) { | |
1051 | x = inb_p(0x220+6); | |
1052 | if ( (x!=0xff) && (x>=0xf0) ) { | |
1053 | io = 0x220; | |
1054 | goto got_port; | |
1055 | } | |
1056 | release_region(0x220,8); | |
1057 | } | |
1058 | if (io != 0x220 && request_region(0x240,8,"ltpc")) { | |
1059 | y = inb_p(0x240+6); | |
1060 | if ( (y!=0xff) && (y>=0xf0) ){ | |
1061 | io = 0x240; | |
1062 | goto got_port; | |
1063 | } | |
1064 | release_region(0x240,8); | |
1065 | } | |
1066 | ||
1067 | /* give up in despair */ | |
1068 | printk(KERN_ERR "LocalTalk card not found; 220 = %02x, 240 = %02x.\n", x,y); | |
1069 | err = -ENODEV; | |
1070 | goto out1; | |
1071 | ||
1072 | got_port: | |
1073 | /* probe for the IRQ line */ | |
1074 | if (irq < 2) { | |
1075 | unsigned long irq_mask; | |
1076 | ||
1077 | irq_mask = probe_irq_on(); | |
1078 | /* reset the interrupt line */ | |
1079 | inb_p(io+7); | |
1080 | inb_p(io+7); | |
1081 | /* trigger an interrupt (I hope) */ | |
1082 | inb_p(io+6); | |
1083 | mdelay(2); | |
1084 | autoirq = probe_irq_off(irq_mask); | |
1085 | ||
1086 | if (autoirq == 0) { | |
1087 | printk(KERN_ERR "ltpc: probe at %#x failed to detect IRQ line.\n", io); | |
1088 | } else { | |
1089 | irq = autoirq; | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | /* allocate a DMA buffer */ | |
1094 | ltdmabuf = (unsigned char *) dma_mem_alloc(1000); | |
1095 | if (!ltdmabuf) { | |
1096 | printk(KERN_ERR "ltpc: mem alloc failed\n"); | |
1097 | err = -ENOMEM; | |
1098 | goto out2; | |
1099 | } | |
1100 | ||
1101 | ltdmacbuf = <dmabuf[800]; | |
1102 | ||
1103 | if(debug & DEBUG_VERBOSE) { | |
1104 | printk("ltdmabuf pointer %08lx\n",(unsigned long) ltdmabuf); | |
1105 | } | |
1106 | ||
1107 | /* reset the card */ | |
1108 | ||
1109 | inb_p(io+1); | |
1110 | inb_p(io+3); | |
1111 | ||
1112 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1113 | schedule_timeout(2*HZ/100); | |
1114 | ||
1115 | inb_p(io+0); | |
1116 | inb_p(io+2); | |
1117 | inb_p(io+7); /* clear reset */ | |
1118 | inb_p(io+4); | |
1119 | inb_p(io+5); | |
1120 | inb_p(io+5); /* enable dma */ | |
1121 | inb_p(io+6); /* tri-state interrupt line */ | |
1122 | ||
1123 | set_current_state(TASK_UNINTERRUPTIBLE); | |
1124 | schedule_timeout(HZ); | |
1125 | ||
1126 | /* now, figure out which dma channel we're using, unless it's | |
1127 | already been specified */ | |
1128 | /* well, 0 is a legal DMA channel, but the LTPC card doesn't | |
1129 | use it... */ | |
1130 | dma = ltpc_probe_dma(io, dma); | |
1131 | if (!dma) { /* no dma channel */ | |
1132 | printk(KERN_ERR "No DMA channel found on ltpc card.\n"); | |
1133 | err = -ENODEV; | |
1134 | goto out3; | |
1135 | } | |
1136 | ||
1137 | /* print out friendly message */ | |
1138 | if(irq) | |
1139 | printk(KERN_INFO "Apple/Farallon LocalTalk-PC card at %03x, IR%d, DMA%d.\n",io,irq,dma); | |
1140 | else | |
1141 | printk(KERN_INFO "Apple/Farallon LocalTalk-PC card at %03x, DMA%d. Using polled mode.\n",io,dma); | |
1142 | ||
1143 | /* Fill in the fields of the device structure with ethernet-generic values. */ | |
1144 | dev->hard_start_xmit = ltpc_xmit; | |
1145 | dev->hard_header = ltpc_hard_header; | |
1146 | dev->get_stats = ltpc_get_stats; | |
1147 | ||
1148 | /* add the ltpc-specific things */ | |
1149 | dev->do_ioctl = <pc_ioctl; | |
1150 | ||
1151 | dev->set_multicast_list = &set_multicast_list; | |
1152 | dev->mc_list = NULL; | |
1153 | dev->base_addr = io; | |
1154 | dev->irq = irq; | |
1155 | dev->dma = dma; | |
1156 | ||
1157 | /* the card will want to send a result at this point */ | |
1158 | /* (I think... leaving out this part makes the kernel crash, | |
1159 | so I put it back in...) */ | |
1160 | ||
1161 | f=claim_dma_lock(); | |
1162 | disable_dma(dma); | |
1163 | clear_dma_ff(dma); | |
1164 | set_dma_mode(dma,DMA_MODE_READ); | |
1165 | set_dma_addr(dma,virt_to_bus(ltdmabuf)); | |
1166 | set_dma_count(dma,0x100); | |
1167 | enable_dma(dma); | |
1168 | release_dma_lock(f); | |
1169 | ||
1170 | (void) inb_p(io+3); | |
1171 | (void) inb_p(io+2); | |
1172 | timeout = jiffies+100*HZ/100; | |
1173 | ||
1174 | while(time_before(jiffies, timeout)) { | |
1175 | if( 0xf9 == inb_p(io+6)) | |
1176 | break; | |
1177 | schedule(); | |
1178 | } | |
1179 | ||
1180 | if(debug & DEBUG_VERBOSE) { | |
1181 | printk("setting up timer and irq\n"); | |
1182 | } | |
1183 | ||
1184 | /* grab it and don't let go :-) */ | |
1185 | if (irq && request_irq( irq, <pc_interrupt, 0, "ltpc", dev) >= 0) | |
1186 | { | |
1187 | (void) inb_p(io+7); /* enable interrupts from board */ | |
1188 | (void) inb_p(io+7); /* and reset irq line */ | |
1189 | } else { | |
1190 | if( irq ) | |
1191 | printk(KERN_ERR "ltpc: IRQ already in use, using polled mode.\n"); | |
1192 | dev->irq = 0; | |
1193 | /* polled mode -- 20 times per second */ | |
1194 | /* this is really, really slow... should it poll more often? */ | |
1195 | init_timer(<pc_timer); | |
1196 | ltpc_timer.function=ltpc_poll; | |
1197 | ltpc_timer.data = (unsigned long) dev; | |
1198 | ||
1199 | ltpc_timer.expires = jiffies + HZ/20; | |
1200 | add_timer(<pc_timer); | |
1201 | } | |
1202 | err = register_netdev(dev); | |
1203 | if (err) | |
1204 | goto out4; | |
1205 | ||
1206 | return NULL; | |
1207 | out4: | |
1208 | del_timer_sync(<pc_timer); | |
1209 | if (dev->irq) | |
1210 | free_irq(dev->irq, dev); | |
1211 | out3: | |
1212 | free_pages((unsigned long)ltdmabuf, get_order(1000)); | |
1213 | out2: | |
1214 | release_region(io, 8); | |
1215 | out1: | |
1216 | free_netdev(dev); | |
1217 | out: | |
1218 | return ERR_PTR(err); | |
1219 | } | |
1220 | ||
1221 | #ifndef MODULE | |
1222 | /* handles "ltpc=io,irq,dma" kernel command lines */ | |
1223 | static int __init ltpc_setup(char *str) | |
1224 | { | |
1225 | int ints[5]; | |
1226 | ||
1227 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
1228 | ||
1229 | if (ints[0] == 0) { | |
1230 | if (str && !strncmp(str, "auto", 4)) { | |
1231 | /* do nothing :-) */ | |
1232 | } | |
1233 | else { | |
1234 | /* usage message */ | |
1235 | printk (KERN_ERR | |
1236 | "ltpc: usage: ltpc=auto|iobase[,irq[,dma]]\n"); | |
1237 | return 0; | |
1238 | } | |
1239 | } else { | |
1240 | io = ints[1]; | |
1241 | if (ints[0] > 1) { | |
1242 | irq = ints[2]; | |
1243 | } | |
1244 | if (ints[0] > 2) { | |
1245 | dma = ints[3]; | |
1246 | } | |
1247 | /* ignore any other paramters */ | |
1248 | } | |
1249 | return 1; | |
1250 | } | |
1251 | ||
1252 | __setup("ltpc=", ltpc_setup); | |
1253 | #endif /* MODULE */ | |
1254 | ||
1255 | static struct net_device *dev_ltpc; | |
1256 | ||
1257 | #ifdef MODULE | |
1258 | ||
1259 | MODULE_LICENSE("GPL"); | |
1260 | module_param(debug, int, 0); | |
1261 | module_param(io, int, 0); | |
1262 | module_param(irq, int, 0); | |
1263 | module_param(dma, int, 0); | |
1264 | ||
1265 | ||
1266 | int __init init_module(void) | |
1267 | { | |
1268 | if(io == 0) | |
1269 | printk(KERN_NOTICE | |
1270 | "ltpc: Autoprobing is not recommended for modules\n"); | |
1271 | ||
1272 | dev_ltpc = ltpc_probe(); | |
1273 | if (IS_ERR(dev_ltpc)) | |
1274 | return PTR_ERR(dev_ltpc); | |
1275 | return 0; | |
1276 | } | |
1277 | #endif | |
1278 | ||
1279 | static void __exit ltpc_cleanup(void) | |
1280 | { | |
1281 | ||
1282 | if(debug & DEBUG_VERBOSE) printk("unregister_netdev\n"); | |
1283 | unregister_netdev(dev_ltpc); | |
1284 | ||
1285 | ltpc_timer.data = 0; /* signal the poll routine that we're done */ | |
1286 | ||
1287 | del_timer_sync(<pc_timer); | |
1288 | ||
1289 | if(debug & DEBUG_VERBOSE) printk("freeing irq\n"); | |
1290 | ||
1291 | if (dev_ltpc->irq) | |
1292 | free_irq(dev_ltpc->irq, dev_ltpc); | |
1293 | ||
1294 | if(debug & DEBUG_VERBOSE) printk("freeing dma\n"); | |
1295 | ||
1296 | if (dev_ltpc->dma) | |
1297 | free_dma(dev_ltpc->dma); | |
1298 | ||
1299 | if(debug & DEBUG_VERBOSE) printk("freeing ioaddr\n"); | |
1300 | ||
1301 | if (dev_ltpc->base_addr) | |
1302 | release_region(dev_ltpc->base_addr,8); | |
1303 | ||
1304 | free_netdev(dev_ltpc); | |
1305 | ||
1306 | if(debug & DEBUG_VERBOSE) printk("free_pages\n"); | |
1307 | ||
1308 | free_pages( (unsigned long) ltdmabuf, get_order(1000)); | |
1309 | ||
1310 | if(debug & DEBUG_VERBOSE) printk("returning from cleanup_module\n"); | |
1311 | } | |
1312 | ||
1313 | module_exit(ltpc_cleanup); |