Commit | Line | Data |
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1da177e4 LT |
1 | /* cops.c: LocalTalk driver for Linux. |
2 | * | |
3 | * Authors: | |
4 | * - Jay Schulist <jschlst@samba.org> | |
5 | * | |
6 | * With more than a little help from; | |
113aa838 | 7 | * - Alan Cox <alan@lxorguk.ukuu.org.uk> |
1da177e4 LT |
8 | * |
9 | * Derived from: | |
10 | * - skeleton.c: A network driver outline for linux. | |
11 | * Written 1993-94 by Donald Becker. | |
12 | * - ltpc.c: A driver for the LocalTalk PC card. | |
13 | * Written by Bradford W. Johnson. | |
14 | * | |
15 | * Copyright 1993 United States Government as represented by the | |
16 | * Director, National Security Agency. | |
17 | * | |
18 | * This software may be used and distributed according to the terms | |
19 | * of the GNU General Public License, incorporated herein by reference. | |
20 | * | |
21 | * Changes: | |
22 | * 19970608 Alan Cox Allowed dual card type support | |
23 | * Can set board type in insmod | |
24 | * Hooks for cops_setup routine | |
25 | * (not yet implemented). | |
26 | * 19971101 Jay Schulist Fixes for multiple lt* devices. | |
27 | * 19980607 Steven Hirsch Fixed the badly broken support | |
28 | * for Tangent type cards. Only | |
29 | * tested on Daystar LT200. Some | |
30 | * cleanup of formatting and program | |
31 | * logic. Added emacs 'local-vars' | |
32 | * setup for Jay's brace style. | |
33 | * 20000211 Alan Cox Cleaned up for softnet | |
34 | */ | |
35 | ||
36 | static const char *version = | |
37 | "cops.c:v0.04 6/7/98 Jay Schulist <jschlst@samba.org>\n"; | |
38 | /* | |
39 | * Sources: | |
40 | * COPS Localtalk SDK. This provides almost all of the information | |
41 | * needed. | |
42 | */ | |
43 | ||
44 | /* | |
45 | * insmod/modprobe configurable stuff. | |
46 | * - IO Port, choose one your card supports or 0 if you dare. | |
47 | * - IRQ, also choose one your card supports or nothing and let | |
48 | * the driver figure it out. | |
49 | */ | |
50 | ||
1da177e4 LT |
51 | #include <linux/module.h> |
52 | #include <linux/kernel.h> | |
53 | #include <linux/types.h> | |
54 | #include <linux/fcntl.h> | |
55 | #include <linux/interrupt.h> | |
56 | #include <linux/ptrace.h> | |
57 | #include <linux/ioport.h> | |
58 | #include <linux/in.h> | |
1da177e4 LT |
59 | #include <linux/string.h> |
60 | #include <linux/errno.h> | |
61 | #include <linux/init.h> | |
62 | #include <linux/netdevice.h> | |
63 | #include <linux/etherdevice.h> | |
64 | #include <linux/skbuff.h> | |
65 | #include <linux/if_arp.h> | |
3ef4e9a8 | 66 | #include <linux/if_ltalk.h> |
1da177e4 LT |
67 | #include <linux/delay.h> /* For udelay() */ |
68 | #include <linux/atalk.h> | |
69 | #include <linux/spinlock.h> | |
70 | #include <linux/bitops.h> | |
b132fba1 | 71 | #include <linux/jiffies.h> |
1da177e4 | 72 | |
1da177e4 LT |
73 | #include <asm/io.h> |
74 | #include <asm/dma.h> | |
75 | ||
76 | #include "cops.h" /* Our Stuff */ | |
77 | #include "cops_ltdrv.h" /* Firmware code for Tangent type cards. */ | |
78 | #include "cops_ffdrv.h" /* Firmware code for Dayna type cards. */ | |
79 | ||
80 | /* | |
81 | * The name of the card. Is used for messages and in the requests for | |
82 | * io regions, irqs and dma channels | |
83 | */ | |
84 | ||
85 | static const char *cardname = "cops"; | |
86 | ||
87 | #ifdef CONFIG_COPS_DAYNA | |
88 | static int board_type = DAYNA; /* Module exported */ | |
89 | #else | |
90 | static int board_type = TANGENT; | |
91 | #endif | |
92 | ||
93 | static int io = 0x240; /* Default IO for Dayna */ | |
94 | static int irq = 5; /* Default IRQ */ | |
95 | ||
96 | /* | |
97 | * COPS Autoprobe information. | |
98 | * Right now if port address is right but IRQ is not 5 this will | |
99 | * return a 5 no matter what since we will still get a status response. | |
100 | * Need one more additional check to narrow down after we have gotten | |
101 | * the ioaddr. But since only other possible IRQs is 3 and 4 so no real | |
102 | * hurry on this. I *STRONGLY* recommend using IRQ 5 for your card with | |
103 | * this driver. | |
104 | * | |
105 | * This driver has 2 modes and they are: Dayna mode and Tangent mode. | |
106 | * Each mode corresponds with the type of card. It has been found | |
107 | * that there are 2 main types of cards and all other cards are | |
108 | * the same and just have different names or only have minor differences | |
109 | * such as more IO ports. As this driver is tested it will | |
110 | * become more clear on exactly what cards are supported. The driver | |
111 | * defaults to using Dayna mode. To change the drivers mode, simply | |
112 | * select Dayna or Tangent mode when configuring the kernel. | |
113 | * | |
114 | * This driver should support: | |
115 | * TANGENT driver mode: | |
116 | * Tangent ATB-II, Novell NL-1000, Daystar Digital LT-200, | |
117 | * COPS LT-1 | |
118 | * DAYNA driver mode: | |
119 | * Dayna DL2000/DaynaTalk PC (Half Length), COPS LT-95, | |
120 | * Farallon PhoneNET PC III, Farallon PhoneNET PC II | |
af901ca1 | 121 | * Other cards possibly supported mode unknown though: |
1da177e4 LT |
122 | * Dayna DL2000 (Full length), COPS LT/M (Micro-Channel) |
123 | * | |
124 | * Cards NOT supported by this driver but supported by the ltpc.c | |
125 | * driver written by Bradford W. Johnson <johns393@maroon.tc.umn.edu> | |
126 | * Farallon PhoneNET PC | |
127 | * Original Apple LocalTalk PC card | |
128 | * | |
129 | * N.B. | |
130 | * | |
131 | * The Daystar Digital LT200 boards do not support interrupt-driven | |
132 | * IO. You must specify 'irq=0xff' as a module parameter to invoke | |
133 | * polled mode. I also believe that the port probing logic is quite | |
134 | * dangerous at best and certainly hopeless for a polled card. Best to | |
135 | * specify both. - Steve H. | |
136 | * | |
137 | */ | |
138 | ||
139 | /* | |
140 | * Zero terminated list of IO ports to probe. | |
141 | */ | |
142 | ||
143 | static unsigned int ports[] = { | |
144 | 0x240, 0x340, 0x200, 0x210, 0x220, 0x230, 0x260, | |
145 | 0x2A0, 0x300, 0x310, 0x320, 0x330, 0x350, 0x360, | |
146 | 0 | |
147 | }; | |
148 | ||
149 | /* | |
150 | * Zero terminated list of IRQ ports to probe. | |
151 | */ | |
152 | ||
153 | static int cops_irqlist[] = { | |
154 | 5, 4, 3, 0 | |
155 | }; | |
156 | ||
157 | static struct timer_list cops_timer; | |
158 | ||
159 | /* use 0 for production, 1 for verification, 2 for debug, 3 for verbose debug */ | |
160 | #ifndef COPS_DEBUG | |
161 | #define COPS_DEBUG 1 | |
162 | #endif | |
163 | static unsigned int cops_debug = COPS_DEBUG; | |
164 | ||
165 | /* The number of low I/O ports used by the card. */ | |
166 | #define COPS_IO_EXTENT 8 | |
167 | ||
168 | /* Information that needs to be kept for each board. */ | |
169 | ||
170 | struct cops_local | |
171 | { | |
1da177e4 LT |
172 | int board; /* Holds what board type is. */ |
173 | int nodeid; /* Set to 1 once have nodeid. */ | |
174 | unsigned char node_acquire; /* Node ID when acquired. */ | |
175 | struct atalk_addr node_addr; /* Full node address */ | |
176 | spinlock_t lock; /* RX/TX lock */ | |
177 | }; | |
178 | ||
179 | /* Index to functions, as function prototypes. */ | |
180 | static int cops_probe1 (struct net_device *dev, int ioaddr); | |
181 | static int cops_irq (int ioaddr, int board); | |
182 | ||
183 | static int cops_open (struct net_device *dev); | |
184 | static int cops_jumpstart (struct net_device *dev); | |
185 | static void cops_reset (struct net_device *dev, int sleep); | |
186 | static void cops_load (struct net_device *dev); | |
187 | static int cops_nodeid (struct net_device *dev, int nodeid); | |
188 | ||
7d12e780 | 189 | static irqreturn_t cops_interrupt (int irq, void *dev_id); |
1da177e4 LT |
190 | static void cops_poll (unsigned long ltdev); |
191 | static void cops_timeout(struct net_device *dev); | |
192 | static void cops_rx (struct net_device *dev); | |
0fc48098 SH |
193 | static netdev_tx_t cops_send_packet (struct sk_buff *skb, |
194 | struct net_device *dev); | |
1da177e4 | 195 | static void set_multicast_list (struct net_device *dev); |
1da177e4 LT |
196 | static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd); |
197 | static int cops_close (struct net_device *dev); | |
1da177e4 LT |
198 | |
199 | static void cleanup_card(struct net_device *dev) | |
200 | { | |
201 | if (dev->irq) | |
202 | free_irq(dev->irq, dev); | |
203 | release_region(dev->base_addr, COPS_IO_EXTENT); | |
204 | } | |
205 | ||
206 | /* | |
207 | * Check for a network adaptor of this type, and return '0' iff one exists. | |
208 | * If dev->base_addr == 0, probe all likely locations. | |
209 | * If dev->base_addr in [1..0x1ff], always return failure. | |
210 | * otherwise go with what we pass in. | |
211 | */ | |
212 | struct net_device * __init cops_probe(int unit) | |
213 | { | |
214 | struct net_device *dev; | |
215 | unsigned *port; | |
216 | int base_addr; | |
217 | int err = 0; | |
218 | ||
3ef4e9a8 | 219 | dev = alloc_ltalkdev(sizeof(struct cops_local)); |
1da177e4 LT |
220 | if (!dev) |
221 | return ERR_PTR(-ENOMEM); | |
222 | ||
223 | if (unit >= 0) { | |
224 | sprintf(dev->name, "lt%d", unit); | |
225 | netdev_boot_setup_check(dev); | |
226 | irq = dev->irq; | |
227 | base_addr = dev->base_addr; | |
228 | } else { | |
229 | base_addr = dev->base_addr = io; | |
230 | } | |
231 | ||
1da177e4 LT |
232 | if (base_addr > 0x1ff) { /* Check a single specified location. */ |
233 | err = cops_probe1(dev, base_addr); | |
234 | } else if (base_addr != 0) { /* Don't probe at all. */ | |
235 | err = -ENXIO; | |
236 | } else { | |
237 | /* FIXME Does this really work for cards which generate irq? | |
238 | * It's definitely N.G. for polled Tangent. sh | |
239 | * Dayna cards don't autoprobe well at all, but if your card is | |
240 | * at IRQ 5 & IO 0x240 we find it every time. ;) JS | |
241 | */ | |
242 | for (port = ports; *port && cops_probe1(dev, *port) < 0; port++) | |
243 | ; | |
244 | if (!*port) | |
245 | err = -ENODEV; | |
246 | } | |
247 | if (err) | |
248 | goto out; | |
249 | err = register_netdev(dev); | |
250 | if (err) | |
251 | goto out1; | |
252 | return dev; | |
253 | out1: | |
254 | cleanup_card(dev); | |
255 | out: | |
256 | free_netdev(dev); | |
257 | return ERR_PTR(err); | |
258 | } | |
259 | ||
c2839d43 SH |
260 | static const struct net_device_ops cops_netdev_ops = { |
261 | .ndo_open = cops_open, | |
262 | .ndo_stop = cops_close, | |
263 | .ndo_start_xmit = cops_send_packet, | |
264 | .ndo_tx_timeout = cops_timeout, | |
265 | .ndo_do_ioctl = cops_ioctl, | |
afc4b13d | 266 | .ndo_set_rx_mode = set_multicast_list, |
c2839d43 SH |
267 | }; |
268 | ||
1da177e4 LT |
269 | /* |
270 | * This is the real probe routine. Linux has a history of friendly device | |
271 | * probes on the ISA bus. A good device probes avoids doing writes, and | |
272 | * verifies that the correct device exists and functions. | |
273 | */ | |
274 | static int __init cops_probe1(struct net_device *dev, int ioaddr) | |
275 | { | |
276 | struct cops_local *lp; | |
277 | static unsigned version_printed; | |
278 | int board = board_type; | |
279 | int retval; | |
280 | ||
281 | if(cops_debug && version_printed++ == 0) | |
282 | printk("%s", version); | |
283 | ||
284 | /* Grab the region so no one else tries to probe our ioports. */ | |
285 | if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name)) | |
286 | return -EBUSY; | |
287 | ||
288 | /* | |
289 | * Since this board has jumpered interrupts, allocate the interrupt | |
290 | * vector now. There is no point in waiting since no other device | |
291 | * can use the interrupt, and this marks the irq as busy. Jumpered | |
292 | * interrupts are typically not reported by the boards, and we must | |
293 | * used AutoIRQ to find them. | |
294 | */ | |
295 | dev->irq = irq; | |
296 | switch (dev->irq) | |
297 | { | |
298 | case 0: | |
299 | /* COPS AutoIRQ routine */ | |
300 | dev->irq = cops_irq(ioaddr, board); | |
301 | if (dev->irq) | |
302 | break; | |
303 | /* No IRQ found on this port, fallthrough */ | |
304 | case 1: | |
305 | retval = -EINVAL; | |
306 | goto err_out; | |
307 | ||
308 | /* Fixup for users that don't know that IRQ 2 is really | |
309 | * IRQ 9, or don't know which one to set. | |
310 | */ | |
311 | case 2: | |
312 | dev->irq = 9; | |
313 | break; | |
314 | ||
315 | /* Polled operation requested. Although irq of zero passed as | |
316 | * a parameter tells the init routines to probe, we'll | |
317 | * overload it to denote polled operation at runtime. | |
318 | */ | |
319 | case 0xff: | |
320 | dev->irq = 0; | |
321 | break; | |
322 | ||
323 | default: | |
324 | break; | |
325 | } | |
326 | ||
327 | /* Reserve any actual interrupt. */ | |
328 | if (dev->irq) { | |
a0607fd3 | 329 | retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev); |
1da177e4 LT |
330 | if (retval) |
331 | goto err_out; | |
332 | } | |
333 | ||
334 | dev->base_addr = ioaddr; | |
335 | ||
336 | lp = netdev_priv(dev); | |
1da177e4 LT |
337 | spin_lock_init(&lp->lock); |
338 | ||
339 | /* Copy local board variable to lp struct. */ | |
340 | lp->board = board; | |
341 | ||
c2839d43 | 342 | dev->netdev_ops = &cops_netdev_ops; |
1da177e4 | 343 | dev->watchdog_timeo = HZ * 2; |
3b04ddde | 344 | |
1da177e4 LT |
345 | |
346 | /* Tell the user where the card is and what mode we're in. */ | |
347 | if(board==DAYNA) | |
348 | printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n", | |
349 | dev->name, cardname, ioaddr, dev->irq); | |
350 | if(board==TANGENT) { | |
351 | if(dev->irq) | |
352 | printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n", | |
353 | dev->name, cardname, ioaddr, dev->irq); | |
354 | else | |
355 | printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n", | |
356 | dev->name, cardname, ioaddr); | |
357 | ||
358 | } | |
359 | return 0; | |
360 | ||
361 | err_out: | |
362 | release_region(ioaddr, COPS_IO_EXTENT); | |
363 | return retval; | |
364 | } | |
365 | ||
366 | static int __init cops_irq (int ioaddr, int board) | |
367 | { /* | |
368 | * This does not use the IRQ to determine where the IRQ is. We just | |
369 | * assume that when we get a correct status response that it's the IRQ. | |
370 | * This really just verifies the IO port but since we only have access | |
371 | * to such a small number of IRQs (5, 4, 3) this is not bad. | |
372 | * This will probably not work for more than one card. | |
373 | */ | |
374 | int irqaddr=0; | |
375 | int i, x, status; | |
376 | ||
377 | if(board==DAYNA) | |
378 | { | |
379 | outb(0, ioaddr+DAYNA_RESET); | |
380 | inb(ioaddr+DAYNA_RESET); | |
381 | mdelay(333); | |
382 | } | |
383 | if(board==TANGENT) | |
384 | { | |
385 | inb(ioaddr); | |
386 | outb(0, ioaddr); | |
387 | outb(0, ioaddr+TANG_RESET); | |
388 | } | |
389 | ||
390 | for(i=0; cops_irqlist[i] !=0; i++) | |
391 | { | |
392 | irqaddr = cops_irqlist[i]; | |
393 | for(x = 0xFFFF; x>0; x --) /* wait for response */ | |
394 | { | |
395 | if(board==DAYNA) | |
396 | { | |
397 | status = (inb(ioaddr+DAYNA_CARD_STATUS)&3); | |
398 | if(status == 1) | |
399 | return irqaddr; | |
400 | } | |
401 | if(board==TANGENT) | |
402 | { | |
403 | if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0) | |
404 | return irqaddr; | |
405 | } | |
406 | } | |
407 | } | |
408 | return 0; /* no IRQ found */ | |
409 | } | |
410 | ||
411 | /* | |
412 | * Open/initialize the board. This is called (in the current kernel) | |
413 | * sometime after booting when the 'ifconfig' program is run. | |
414 | */ | |
415 | static int cops_open(struct net_device *dev) | |
416 | { | |
417 | struct cops_local *lp = netdev_priv(dev); | |
418 | ||
419 | if(dev->irq==0) | |
420 | { | |
421 | /* | |
422 | * I don't know if the Dayna-style boards support polled | |
423 | * operation. For now, only allow it for Tangent. | |
424 | */ | |
425 | if(lp->board==TANGENT) /* Poll 20 times per second */ | |
426 | { | |
427 | init_timer(&cops_timer); | |
428 | cops_timer.function = cops_poll; | |
429 | cops_timer.data = (unsigned long)dev; | |
430 | cops_timer.expires = jiffies + HZ/20; | |
431 | add_timer(&cops_timer); | |
432 | } | |
433 | else | |
434 | { | |
435 | printk(KERN_WARNING "%s: No irq line set\n", dev->name); | |
436 | return -EAGAIN; | |
437 | } | |
438 | } | |
439 | ||
440 | cops_jumpstart(dev); /* Start the card up. */ | |
441 | ||
442 | netif_start_queue(dev); | |
443 | return 0; | |
444 | } | |
445 | ||
446 | /* | |
447 | * This allows for a dynamic start/restart of the entire card. | |
448 | */ | |
449 | static int cops_jumpstart(struct net_device *dev) | |
450 | { | |
451 | struct cops_local *lp = netdev_priv(dev); | |
452 | ||
453 | /* | |
454 | * Once the card has the firmware loaded and has acquired | |
455 | * the nodeid, if it is reset it will lose it all. | |
456 | */ | |
457 | cops_reset(dev,1); /* Need to reset card before load firmware. */ | |
458 | cops_load(dev); /* Load the firmware. */ | |
459 | ||
460 | /* | |
461 | * If atalkd already gave us a nodeid we will use that | |
462 | * one again, else we wait for atalkd to give us a nodeid | |
463 | * in cops_ioctl. This may cause a problem if someone steals | |
464 | * our nodeid while we are resetting. | |
465 | */ | |
466 | if(lp->nodeid == 1) | |
467 | cops_nodeid(dev,lp->node_acquire); | |
468 | ||
469 | return 0; | |
470 | } | |
471 | ||
472 | static void tangent_wait_reset(int ioaddr) | |
473 | { | |
474 | int timeout=0; | |
475 | ||
476 | while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) | |
477 | mdelay(1); /* Wait 1 second */ | |
478 | } | |
479 | ||
480 | /* | |
481 | * Reset the LocalTalk board. | |
482 | */ | |
483 | static void cops_reset(struct net_device *dev, int sleep) | |
484 | { | |
485 | struct cops_local *lp = netdev_priv(dev); | |
486 | int ioaddr=dev->base_addr; | |
487 | ||
488 | if(lp->board==TANGENT) | |
489 | { | |
490 | inb(ioaddr); /* Clear request latch. */ | |
491 | outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */ | |
492 | outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */ | |
493 | ||
494 | tangent_wait_reset(ioaddr); | |
495 | outb(0, ioaddr+TANG_CLEAR_INT); | |
496 | } | |
497 | if(lp->board==DAYNA) | |
498 | { | |
499 | outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */ | |
500 | inb(ioaddr+DAYNA_RESET); /* Clear the reset */ | |
7ab267d4 JG |
501 | if (sleep) |
502 | msleep(333); | |
503 | else | |
504 | mdelay(333); | |
1da177e4 | 505 | } |
7ab267d4 | 506 | |
1da177e4 | 507 | netif_wake_queue(dev); |
1da177e4 LT |
508 | } |
509 | ||
510 | static void cops_load (struct net_device *dev) | |
511 | { | |
512 | struct ifreq ifr; | |
513 | struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru; | |
514 | struct cops_local *lp = netdev_priv(dev); | |
515 | int ioaddr=dev->base_addr; | |
516 | int length, i = 0; | |
517 | ||
518 | strcpy(ifr.ifr_name,"lt0"); | |
519 | ||
520 | /* Get card's firmware code and do some checks on it. */ | |
521 | #ifdef CONFIG_COPS_DAYNA | |
522 | if(lp->board==DAYNA) | |
523 | { | |
524 | ltf->length=sizeof(ffdrv_code); | |
525 | ltf->data=ffdrv_code; | |
526 | } | |
527 | else | |
528 | #endif | |
529 | #ifdef CONFIG_COPS_TANGENT | |
530 | if(lp->board==TANGENT) | |
531 | { | |
532 | ltf->length=sizeof(ltdrv_code); | |
533 | ltf->data=ltdrv_code; | |
534 | } | |
535 | else | |
536 | #endif | |
537 | { | |
538 | printk(KERN_INFO "%s; unsupported board type.\n", dev->name); | |
539 | return; | |
540 | } | |
541 | ||
542 | /* Check to make sure firmware is correct length. */ | |
543 | if(lp->board==DAYNA && ltf->length!=5983) | |
544 | { | |
545 | printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name); | |
546 | return; | |
547 | } | |
548 | if(lp->board==TANGENT && ltf->length!=2501) | |
549 | { | |
550 | printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name); | |
551 | return; | |
552 | } | |
553 | ||
554 | if(lp->board==DAYNA) | |
555 | { | |
556 | /* | |
557 | * We must wait for a status response | |
558 | * with the DAYNA board. | |
559 | */ | |
560 | while(++i<65536) | |
561 | { | |
562 | if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1) | |
563 | break; | |
564 | } | |
565 | ||
566 | if(i==65536) | |
567 | return; | |
568 | } | |
569 | ||
570 | /* | |
571 | * Upload the firmware and kick. Byte-by-byte works nicely here. | |
572 | */ | |
573 | i=0; | |
574 | length = ltf->length; | |
575 | while(length--) | |
576 | { | |
577 | outb(ltf->data[i], ioaddr); | |
578 | i++; | |
579 | } | |
580 | ||
581 | if(cops_debug > 1) | |
582 | printk("%s: Uploaded firmware - %d bytes of %d bytes.\n", | |
583 | dev->name, i, ltf->length); | |
584 | ||
585 | if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */ | |
586 | outb(1, ioaddr+DAYNA_INT_CARD); | |
587 | else /* Tell Tang to run the firmware code. */ | |
588 | inb(ioaddr); | |
589 | ||
590 | if(lp->board==TANGENT) | |
591 | { | |
592 | tangent_wait_reset(ioaddr); | |
593 | inb(ioaddr); /* Clear initial ready signal. */ | |
594 | } | |
1da177e4 LT |
595 | } |
596 | ||
597 | /* | |
598 | * Get the LocalTalk Nodeid from the card. We can suggest | |
599 | * any nodeid 1-254. The card will try and get that exact | |
600 | * address else we can specify 0 as the nodeid and the card | |
601 | * will autoprobe for a nodeid. | |
602 | */ | |
603 | static int cops_nodeid (struct net_device *dev, int nodeid) | |
604 | { | |
605 | struct cops_local *lp = netdev_priv(dev); | |
606 | int ioaddr = dev->base_addr; | |
607 | ||
608 | if(lp->board == DAYNA) | |
609 | { | |
610 | /* Empty any pending adapter responses. */ | |
611 | while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) | |
612 | { | |
613 | outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */ | |
614 | if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) | |
615 | cops_rx(dev); /* Kick any packets waiting. */ | |
616 | schedule(); | |
617 | } | |
618 | ||
619 | outb(2, ioaddr); /* Output command packet length as 2. */ | |
620 | outb(0, ioaddr); | |
621 | outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */ | |
622 | outb(nodeid, ioaddr); /* Suggest node address. */ | |
623 | } | |
624 | ||
625 | if(lp->board == TANGENT) | |
626 | { | |
627 | /* Empty any pending adapter responses. */ | |
628 | while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) | |
629 | { | |
630 | outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */ | |
631 | cops_rx(dev); /* Kick out packets waiting. */ | |
632 | schedule(); | |
633 | } | |
634 | ||
635 | /* Not sure what Tangent does if nodeid picked is used. */ | |
636 | if(nodeid == 0) /* Seed. */ | |
637 | nodeid = jiffies&0xFF; /* Get a random try */ | |
638 | outb(2, ioaddr); /* Command length LSB */ | |
639 | outb(0, ioaddr); /* Command length MSB */ | |
640 | outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */ | |
641 | outb(nodeid, ioaddr); /* LAP address hint. */ | |
642 | outb(0xFF, ioaddr); /* Int. level to use */ | |
643 | } | |
644 | ||
645 | lp->node_acquire=0; /* Set nodeid holder to 0. */ | |
646 | while(lp->node_acquire==0) /* Get *True* nodeid finally. */ | |
647 | { | |
648 | outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */ | |
649 | ||
650 | if(lp->board == DAYNA) | |
651 | { | |
652 | if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) | |
653 | cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ | |
654 | } | |
655 | if(lp->board == TANGENT) | |
656 | { | |
657 | if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) | |
658 | cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ | |
659 | } | |
660 | schedule(); | |
661 | } | |
662 | ||
663 | if(cops_debug > 1) | |
664 | printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n", | |
665 | dev->name, lp->node_acquire); | |
666 | ||
667 | lp->nodeid=1; /* Set got nodeid to 1. */ | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | /* | |
673 | * Poll the Tangent type cards to see if we have work. | |
674 | */ | |
675 | ||
676 | static void cops_poll(unsigned long ltdev) | |
677 | { | |
678 | int ioaddr, status; | |
679 | int boguscount = 0; | |
680 | ||
681 | struct net_device *dev = (struct net_device *)ltdev; | |
682 | ||
683 | del_timer(&cops_timer); | |
684 | ||
685 | if(dev == NULL) | |
686 | return; /* We've been downed */ | |
687 | ||
688 | ioaddr = dev->base_addr; | |
689 | do { | |
690 | status=inb(ioaddr+TANG_CARD_STATUS); | |
691 | if(status & TANG_RX_READY) | |
692 | cops_rx(dev); | |
693 | if(status & TANG_TX_READY) | |
694 | netif_wake_queue(dev); | |
695 | status = inb(ioaddr+TANG_CARD_STATUS); | |
696 | } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); | |
697 | ||
698 | /* poll 20 times per second */ | |
699 | cops_timer.expires = jiffies + HZ/20; | |
700 | add_timer(&cops_timer); | |
1da177e4 LT |
701 | } |
702 | ||
703 | /* | |
704 | * The typical workload of the driver: | |
705 | * Handle the network interface interrupts. | |
706 | */ | |
7d12e780 | 707 | static irqreturn_t cops_interrupt(int irq, void *dev_id) |
1da177e4 LT |
708 | { |
709 | struct net_device *dev = dev_id; | |
710 | struct cops_local *lp; | |
711 | int ioaddr, status; | |
712 | int boguscount = 0; | |
713 | ||
714 | ioaddr = dev->base_addr; | |
715 | lp = netdev_priv(dev); | |
716 | ||
717 | if(lp->board==DAYNA) | |
718 | { | |
719 | do { | |
720 | outb(0, ioaddr + COPS_CLEAR_INT); | |
721 | status=inb(ioaddr+DAYNA_CARD_STATUS); | |
722 | if((status&0x03)==DAYNA_RX_REQUEST) | |
723 | cops_rx(dev); | |
724 | netif_wake_queue(dev); | |
725 | } while(++boguscount < 20); | |
726 | } | |
727 | else | |
728 | { | |
729 | do { | |
730 | status=inb(ioaddr+TANG_CARD_STATUS); | |
731 | if(status & TANG_RX_READY) | |
732 | cops_rx(dev); | |
733 | if(status & TANG_TX_READY) | |
734 | netif_wake_queue(dev); | |
735 | status=inb(ioaddr+TANG_CARD_STATUS); | |
736 | } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); | |
737 | } | |
738 | ||
739 | return IRQ_HANDLED; | |
740 | } | |
741 | ||
742 | /* | |
743 | * We have a good packet(s), get it/them out of the buffers. | |
744 | */ | |
745 | static void cops_rx(struct net_device *dev) | |
746 | { | |
747 | int pkt_len = 0; | |
748 | int rsp_type = 0; | |
749 | struct sk_buff *skb = NULL; | |
750 | struct cops_local *lp = netdev_priv(dev); | |
751 | int ioaddr = dev->base_addr; | |
752 | int boguscount = 0; | |
753 | unsigned long flags; | |
754 | ||
755 | ||
756 | spin_lock_irqsave(&lp->lock, flags); | |
757 | ||
758 | if(lp->board==DAYNA) | |
759 | { | |
760 | outb(0, ioaddr); /* Send out Zero length. */ | |
761 | outb(0, ioaddr); | |
762 | outb(DATA_READ, ioaddr); /* Send read command out. */ | |
763 | ||
764 | /* Wait for DMA to turn around. */ | |
765 | while(++boguscount<1000000) | |
766 | { | |
767 | barrier(); | |
768 | if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY) | |
769 | break; | |
770 | } | |
771 | ||
772 | if(boguscount==1000000) | |
773 | { | |
774 | printk(KERN_WARNING "%s: DMA timed out.\n",dev->name); | |
775 | spin_unlock_irqrestore(&lp->lock, flags); | |
776 | return; | |
777 | } | |
778 | } | |
779 | ||
780 | /* Get response length. */ | |
781 | if(lp->board==DAYNA) | |
782 | pkt_len = inb(ioaddr) & 0xFF; | |
783 | else | |
784 | pkt_len = inb(ioaddr) & 0x00FF; | |
785 | pkt_len |= (inb(ioaddr) << 8); | |
786 | /* Input IO code. */ | |
787 | rsp_type=inb(ioaddr); | |
788 | ||
789 | /* Malloc up new buffer. */ | |
790 | skb = dev_alloc_skb(pkt_len); | |
791 | if(skb == NULL) | |
792 | { | |
793 | printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", | |
794 | dev->name); | |
8bbce3f6 | 795 | dev->stats.rx_dropped++; |
1da177e4 LT |
796 | while(pkt_len--) /* Discard packet */ |
797 | inb(ioaddr); | |
798 | spin_unlock_irqrestore(&lp->lock, flags); | |
799 | return; | |
800 | } | |
801 | skb->dev = dev; | |
802 | skb_put(skb, pkt_len); | |
803 | skb->protocol = htons(ETH_P_LOCALTALK); | |
804 | ||
805 | insb(ioaddr, skb->data, pkt_len); /* Eat the Data */ | |
806 | ||
807 | if(lp->board==DAYNA) | |
808 | outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */ | |
809 | ||
810 | spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ | |
811 | ||
812 | /* Check for bad response length */ | |
813 | if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE) | |
814 | { | |
815 | printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n", | |
816 | dev->name, pkt_len); | |
8bbce3f6 | 817 | dev->stats.tx_errors++; |
1da177e4 LT |
818 | dev_kfree_skb_any(skb); |
819 | return; | |
820 | } | |
821 | ||
822 | /* Set nodeid and then get out. */ | |
823 | if(rsp_type == LAP_INIT_RSP) | |
824 | { /* Nodeid taken from received packet. */ | |
825 | lp->node_acquire = skb->data[0]; | |
826 | dev_kfree_skb_any(skb); | |
827 | return; | |
828 | } | |
829 | ||
830 | /* One last check to make sure we have a good packet. */ | |
831 | if(rsp_type != LAP_RESPONSE) | |
832 | { | |
833 | printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type); | |
8bbce3f6 | 834 | dev->stats.tx_errors++; |
1da177e4 LT |
835 | dev_kfree_skb_any(skb); |
836 | return; | |
837 | } | |
838 | ||
459a98ed | 839 | skb_reset_mac_header(skb); /* Point to entire packet. */ |
1da177e4 | 840 | skb_pull(skb,3); |
badff6d0 | 841 | skb_reset_transport_header(skb); /* Point to data (Skip header). */ |
1da177e4 LT |
842 | |
843 | /* Update the counters. */ | |
8bbce3f6 SH |
844 | dev->stats.rx_packets++; |
845 | dev->stats.rx_bytes += skb->len; | |
1da177e4 LT |
846 | |
847 | /* Send packet to a higher place. */ | |
848 | netif_rx(skb); | |
1da177e4 LT |
849 | } |
850 | ||
851 | static void cops_timeout(struct net_device *dev) | |
852 | { | |
853 | struct cops_local *lp = netdev_priv(dev); | |
854 | int ioaddr = dev->base_addr; | |
855 | ||
8bbce3f6 | 856 | dev->stats.tx_errors++; |
1da177e4 LT |
857 | if(lp->board==TANGENT) |
858 | { | |
859 | if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) | |
860 | printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name); | |
861 | } | |
862 | printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name); | |
863 | cops_jumpstart(dev); /* Restart the card. */ | |
1ae5dc34 | 864 | dev->trans_start = jiffies; /* prevent tx timeout */ |
1da177e4 LT |
865 | netif_wake_queue(dev); |
866 | } | |
867 | ||
868 | ||
869 | /* | |
870 | * Make the card transmit a LocalTalk packet. | |
871 | */ | |
872 | ||
0fc48098 SH |
873 | static netdev_tx_t cops_send_packet(struct sk_buff *skb, |
874 | struct net_device *dev) | |
1da177e4 LT |
875 | { |
876 | struct cops_local *lp = netdev_priv(dev); | |
877 | int ioaddr = dev->base_addr; | |
878 | unsigned long flags; | |
879 | ||
880 | /* | |
881 | * Block a timer-based transmit from overlapping. | |
882 | */ | |
883 | ||
884 | netif_stop_queue(dev); | |
885 | ||
886 | spin_lock_irqsave(&lp->lock, flags); | |
887 | if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */ | |
888 | while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) | |
889 | cpu_relax(); | |
890 | if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */ | |
891 | while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) | |
892 | cpu_relax(); | |
893 | ||
894 | /* Output IO length. */ | |
895 | outb(skb->len, ioaddr); | |
896 | if(lp->board == DAYNA) | |
897 | outb(skb->len >> 8, ioaddr); | |
898 | else | |
899 | outb((skb->len >> 8)&0x0FF, ioaddr); | |
900 | ||
901 | /* Output IO code. */ | |
902 | outb(LAP_WRITE, ioaddr); | |
903 | ||
904 | if(lp->board == DAYNA) /* Check the transmit buffer again. */ | |
905 | while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0); | |
906 | ||
907 | outsb(ioaddr, skb->data, skb->len); /* Send out the data. */ | |
908 | ||
909 | if(lp->board==DAYNA) /* Dayna requires you kick the card */ | |
910 | outb(1, ioaddr+DAYNA_INT_CARD); | |
911 | ||
912 | spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ | |
913 | ||
914 | /* Done sending packet, update counters and cleanup. */ | |
8bbce3f6 SH |
915 | dev->stats.tx_packets++; |
916 | dev->stats.tx_bytes += skb->len; | |
1da177e4 | 917 | dev_kfree_skb (skb); |
1ae5dc34 | 918 | return NETDEV_TX_OK; |
1da177e4 LT |
919 | } |
920 | ||
921 | /* | |
922 | * Dummy function to keep the Appletalk layer happy. | |
923 | */ | |
924 | ||
925 | static void set_multicast_list(struct net_device *dev) | |
926 | { | |
927 | if(cops_debug >= 3) | |
928 | printk("%s: set_multicast_list executed\n", dev->name); | |
929 | } | |
930 | ||
1da177e4 LT |
931 | /* |
932 | * System ioctls for the COPS LocalTalk card. | |
933 | */ | |
934 | ||
935 | static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
936 | { | |
937 | struct cops_local *lp = netdev_priv(dev); | |
938 | struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr; | |
c2fd03a0 | 939 | struct atalk_addr *aa = &lp->node_addr; |
1da177e4 LT |
940 | |
941 | switch(cmd) | |
942 | { | |
943 | case SIOCSIFADDR: | |
944 | /* Get and set the nodeid and network # atalkd wants. */ | |
945 | cops_nodeid(dev, sa->sat_addr.s_node); | |
946 | aa->s_net = sa->sat_addr.s_net; | |
947 | aa->s_node = lp->node_acquire; | |
948 | ||
949 | /* Set broardcast address. */ | |
950 | dev->broadcast[0] = 0xFF; | |
951 | ||
952 | /* Set hardware address. */ | |
953 | dev->dev_addr[0] = aa->s_node; | |
954 | dev->addr_len = 1; | |
955 | return 0; | |
956 | ||
957 | case SIOCGIFADDR: | |
958 | sa->sat_addr.s_net = aa->s_net; | |
959 | sa->sat_addr.s_node = aa->s_node; | |
960 | return 0; | |
961 | ||
962 | default: | |
963 | return -EOPNOTSUPP; | |
964 | } | |
965 | } | |
966 | ||
967 | /* | |
968 | * The inverse routine to cops_open(). | |
969 | */ | |
970 | ||
971 | static int cops_close(struct net_device *dev) | |
972 | { | |
973 | struct cops_local *lp = netdev_priv(dev); | |
974 | ||
975 | /* If we were running polled, yank the timer. | |
976 | */ | |
977 | if(lp->board==TANGENT && dev->irq==0) | |
978 | del_timer(&cops_timer); | |
979 | ||
980 | netif_stop_queue(dev); | |
981 | return 0; | |
982 | } | |
983 | ||
1da177e4 LT |
984 | |
985 | #ifdef MODULE | |
986 | static struct net_device *cops_dev; | |
987 | ||
988 | MODULE_LICENSE("GPL"); | |
989 | module_param(io, int, 0); | |
990 | module_param(irq, int, 0); | |
991 | module_param(board_type, int, 0); | |
992 | ||
b32dac08 | 993 | static int __init cops_module_init(void) |
1da177e4 LT |
994 | { |
995 | if (io == 0) | |
996 | printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", | |
997 | cardname); | |
998 | cops_dev = cops_probe(-1); | |
8c6ffba0 | 999 | return PTR_ERR_OR_ZERO(cops_dev); |
1da177e4 LT |
1000 | } |
1001 | ||
b32dac08 | 1002 | static void __exit cops_module_exit(void) |
1da177e4 LT |
1003 | { |
1004 | unregister_netdev(cops_dev); | |
1005 | cleanup_card(cops_dev); | |
1006 | free_netdev(cops_dev); | |
1007 | } | |
b32dac08 JS |
1008 | module_init(cops_module_init); |
1009 | module_exit(cops_module_exit); | |
1da177e4 | 1010 | #endif /* MODULE */ |