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include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / net / appletalk / cops.c
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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
36static 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
LT		 72
73#include <asm/system.h>
74#include <asm/io.h>
75#include <asm/dma.h>
76
77#include "cops.h" /* Our Stuff */
78#include "cops_ltdrv.h" /* Firmware code for Tangent type cards. */
79#include "cops_ffdrv.h" /* Firmware code for Dayna type cards. */
80
81/*
82 * The name of the card. Is used for messages and in the requests for
83 * io regions, irqs and dma channels
84 */
85
86static const char *cardname = "cops";
87
88#ifdef CONFIG_COPS_DAYNA
89static int board_type = DAYNA; /* Module exported */
90#else
91static int board_type = TANGENT;
92#endif
93
94static int io = 0x240; /* Default IO for Dayna */
95static int irq = 5; /* Default IRQ */
96
97/*
98 * COPS Autoprobe information.
99 * Right now if port address is right but IRQ is not 5 this will
100 * return a 5 no matter what since we will still get a status response.
101 * Need one more additional check to narrow down after we have gotten
102 * the ioaddr. But since only other possible IRQs is 3 and 4 so no real
103 * hurry on this. I *STRONGLY* recommend using IRQ 5 for your card with
104 * this driver.
105 *
106 * This driver has 2 modes and they are: Dayna mode and Tangent mode.
107 * Each mode corresponds with the type of card. It has been found
108 * that there are 2 main types of cards and all other cards are
109 * the same and just have different names or only have minor differences
110 * such as more IO ports. As this driver is tested it will
111 * become more clear on exactly what cards are supported. The driver
112 * defaults to using Dayna mode. To change the drivers mode, simply
113 * select Dayna or Tangent mode when configuring the kernel.
114 *
115 * This driver should support:
116 * TANGENT driver mode:
117 * Tangent ATB-II, Novell NL-1000, Daystar Digital LT-200,
118 * COPS LT-1
119 * DAYNA driver mode:
120 * Dayna DL2000/DaynaTalk PC (Half Length), COPS LT-95,
121 * Farallon PhoneNET PC III, Farallon PhoneNET PC II
af901ca1 122 * Other cards possibly supported mode unknown though:
1da177e4
LT		 123 * Dayna DL2000 (Full length), COPS LT/M (Micro-Channel)
124 *
125 * Cards NOT supported by this driver but supported by the ltpc.c
126 * driver written by Bradford W. Johnson <johns393@maroon.tc.umn.edu>
127 * Farallon PhoneNET PC
128 * Original Apple LocalTalk PC card
129 *
130 * N.B.
131 *
132 * The Daystar Digital LT200 boards do not support interrupt-driven
133 * IO. You must specify 'irq=0xff' as a module parameter to invoke
134 * polled mode. I also believe that the port probing logic is quite
135 * dangerous at best and certainly hopeless for a polled card. Best to
136 * specify both. - Steve H.
137 *
138 */
139
140/*
141 * Zero terminated list of IO ports to probe.
142 */
143
144static unsigned int ports[] = {
145 0x240, 0x340, 0x200, 0x210, 0x220, 0x230, 0x260,
146 0x2A0, 0x300, 0x310, 0x320, 0x330, 0x350, 0x360,
147 0
148};
149
150/*
151 * Zero terminated list of IRQ ports to probe.
152 */
153
154static int cops_irqlist[] = {
155 5, 4, 3, 0
156};
157
158static struct timer_list cops_timer;
159
160/* use 0 for production, 1 for verification, 2 for debug, 3 for verbose debug */
161#ifndef COPS_DEBUG
162#define COPS_DEBUG 1
163#endif
164static unsigned int cops_debug = COPS_DEBUG;
165
166/* The number of low I/O ports used by the card. */
167#define COPS_IO_EXTENT 8
168
169/* Information that needs to be kept for each board. */
170
171struct cops_local
172{
1da177e4
LT		 173 int board; /* Holds what board type is. */
174 int nodeid; /* Set to 1 once have nodeid. */
175 unsigned char node_acquire; /* Node ID when acquired. */
176 struct atalk_addr node_addr; /* Full node address */
177 spinlock_t lock; /* RX/TX lock */
178};
179
180/* Index to functions, as function prototypes. */
181static int cops_probe1 (struct net_device *dev, int ioaddr);
182static int cops_irq (int ioaddr, int board);
183
184static int cops_open (struct net_device *dev);
185static int cops_jumpstart (struct net_device *dev);
186static void cops_reset (struct net_device *dev, int sleep);
187static void cops_load (struct net_device *dev);
188static int cops_nodeid (struct net_device *dev, int nodeid);
189
7d12e780 190static irqreturn_t cops_interrupt (int irq, void *dev_id);
1da177e4
LT		 191static void cops_poll (unsigned long ltdev);
192static void cops_timeout(struct net_device *dev);
193static void cops_rx (struct net_device *dev);
0fc48098
SH		 194static netdev_tx_t cops_send_packet (struct sk_buff *skb,
195 struct net_device *dev);
1da177e4 196static void set_multicast_list (struct net_device *dev);
1da177e4
LT		 197static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
198static int cops_close (struct net_device *dev);
1da177e4
LT		 199
200static void cleanup_card(struct net_device *dev)
201{
202 if (dev->irq)
203 free_irq(dev->irq, dev);
204 release_region(dev->base_addr, COPS_IO_EXTENT);
205}
206
207/*
208 * Check for a network adaptor of this type, and return '0' iff one exists.
209 * If dev->base_addr == 0, probe all likely locations.
210 * If dev->base_addr in [1..0x1ff], always return failure.
211 * otherwise go with what we pass in.
212 */
213struct net_device * __init cops_probe(int unit)
214{
215 struct net_device *dev;
216 unsigned *port;
217 int base_addr;
218 int err = 0;
219
3ef4e9a8 220 dev = alloc_ltalkdev(sizeof(struct cops_local));
1da177e4
LT		 221 if (!dev)
222 return ERR_PTR(-ENOMEM);
223
224 if (unit >= 0) {
225 sprintf(dev->name, "lt%d", unit);
226 netdev_boot_setup_check(dev);
227 irq = dev->irq;
228 base_addr = dev->base_addr;
229 } else {
230 base_addr = dev->base_addr = io;
231 }
232
1da177e4
LT		 233 if (base_addr > 0x1ff) { /* Check a single specified location. */
234 err = cops_probe1(dev, base_addr);
235 } else if (base_addr != 0) { /* Don't probe at all. */
236 err = -ENXIO;
237 } else {
238 /* FIXME Does this really work for cards which generate irq?
239 * It's definitely N.G. for polled Tangent. sh
240 * Dayna cards don't autoprobe well at all, but if your card is
241 * at IRQ 5 & IO 0x240 we find it every time. ;) JS
242 */
243 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++)
244 ;
245 if (!*port)
246 err = -ENODEV;
247 }
248 if (err)
249 goto out;
250 err = register_netdev(dev);
251 if (err)
252 goto out1;
253 return dev;
254out1:
255 cleanup_card(dev);
256out:
257 free_netdev(dev);
258 return ERR_PTR(err);
259}
260
c2839d43
SH		 261static const struct net_device_ops cops_netdev_ops = {
262 .ndo_open = cops_open,
263 .ndo_stop = cops_close,
264 .ndo_start_xmit = cops_send_packet,
265 .ndo_tx_timeout = cops_timeout,
266 .ndo_do_ioctl = cops_ioctl,
267 .ndo_set_multicast_list = set_multicast_list,
268};
269
1da177e4
LT		 270/*
271 * This is the real probe routine. Linux has a history of friendly device
272 * probes on the ISA bus. A good device probes avoids doing writes, and
273 * verifies that the correct device exists and functions.
274 */
275static int __init cops_probe1(struct net_device *dev, int ioaddr)
276{
277 struct cops_local *lp;
278 static unsigned version_printed;
279 int board = board_type;
280 int retval;
281
282 if(cops_debug && version_printed++ == 0)
283 printk("%s", version);
284
285 /* Grab the region so no one else tries to probe our ioports. */
286 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name))
287 return -EBUSY;
288
289 /*
290 * Since this board has jumpered interrupts, allocate the interrupt
291 * vector now. There is no point in waiting since no other device
292 * can use the interrupt, and this marks the irq as busy. Jumpered
293 * interrupts are typically not reported by the boards, and we must
294 * used AutoIRQ to find them.
295 */
296 dev->irq = irq;
297 switch (dev->irq)
298 {
299 case 0:
300 /* COPS AutoIRQ routine */
301 dev->irq = cops_irq(ioaddr, board);
302 if (dev->irq)
303 break;
304 /* No IRQ found on this port, fallthrough */
305 case 1:
306 retval = -EINVAL;
307 goto err_out;
308
309 /* Fixup for users that don't know that IRQ 2 is really
310 * IRQ 9, or don't know which one to set.
311 */
312 case 2:
313 dev->irq = 9;
314 break;
315
316 /* Polled operation requested. Although irq of zero passed as
317 * a parameter tells the init routines to probe, we'll
318 * overload it to denote polled operation at runtime.
319 */
320 case 0xff:
321 dev->irq = 0;
322 break;
323
324 default:
325 break;
326 }
327
328 /* Reserve any actual interrupt. */
329 if (dev->irq) {
a0607fd3 330 retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev);
1da177e4
LT		 331 if (retval)
332 goto err_out;
333 }
334
335 dev->base_addr = ioaddr;
336
337 lp = netdev_priv(dev);
1da177e4
LT		 338 spin_lock_init(&lp->lock);
339
340 /* Copy local board variable to lp struct. */
341 lp->board = board;
342
c2839d43 343 dev->netdev_ops = &cops_netdev_ops;
1da177e4 344 dev->watchdog_timeo = HZ * 2;
3b04ddde 345
1da177e4
LT		 346
347 /* Tell the user where the card is and what mode we're in. */
348 if(board==DAYNA)
349 printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n",
350 dev->name, cardname, ioaddr, dev->irq);
351 if(board==TANGENT) {
352 if(dev->irq)
353 printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n",
354 dev->name, cardname, ioaddr, dev->irq);
355 else
356 printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n",
357 dev->name, cardname, ioaddr);
358
359 }
360 return 0;
361
362err_out:
363 release_region(ioaddr, COPS_IO_EXTENT);
364 return retval;
365}
366
367static int __init cops_irq (int ioaddr, int board)
368{ /*
369 * This does not use the IRQ to determine where the IRQ is. We just
370 * assume that when we get a correct status response that it's the IRQ.
371 * This really just verifies the IO port but since we only have access
372 * to such a small number of IRQs (5, 4, 3) this is not bad.
373 * This will probably not work for more than one card.
374 */
375 int irqaddr=0;
376 int i, x, status;
377
378 if(board==DAYNA)
379 {
380 outb(0, ioaddr+DAYNA_RESET);
381 inb(ioaddr+DAYNA_RESET);
382 mdelay(333);
383 }
384 if(board==TANGENT)
385 {
386 inb(ioaddr);
387 outb(0, ioaddr);
388 outb(0, ioaddr+TANG_RESET);
389 }
390
391 for(i=0; cops_irqlist[i] !=0; i++)
392 {
393 irqaddr = cops_irqlist[i];
394 for(x = 0xFFFF; x>0; x --) /* wait for response */
395 {
396 if(board==DAYNA)
397 {
398 status = (inb(ioaddr+DAYNA_CARD_STATUS)&3);
399 if(status == 1)
400 return irqaddr;
401 }
402 if(board==TANGENT)
403 {
404 if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0)
405 return irqaddr;
406 }
407 }
408 }
409 return 0; /* no IRQ found */
410}
411
412/*
413 * Open/initialize the board. This is called (in the current kernel)
414 * sometime after booting when the 'ifconfig' program is run.
415 */
416static int cops_open(struct net_device *dev)
417{
418 struct cops_local *lp = netdev_priv(dev);
419
420 if(dev->irq==0)
421 {
422 /*
423 * I don't know if the Dayna-style boards support polled
424 * operation. For now, only allow it for Tangent.
425 */
426 if(lp->board==TANGENT) /* Poll 20 times per second */
427 {
428 init_timer(&cops_timer);
429 cops_timer.function = cops_poll;
430 cops_timer.data = (unsigned long)dev;
431 cops_timer.expires = jiffies + HZ/20;
432 add_timer(&cops_timer);
433 }
434 else
435 {
436 printk(KERN_WARNING "%s: No irq line set\n", dev->name);
437 return -EAGAIN;
438 }
439 }
440
441 cops_jumpstart(dev); /* Start the card up. */
442
443 netif_start_queue(dev);
444 return 0;
445}
446
447/*
448 * This allows for a dynamic start/restart of the entire card.
449 */
450static int cops_jumpstart(struct net_device *dev)
451{
452 struct cops_local *lp = netdev_priv(dev);
453
454 /*
455 * Once the card has the firmware loaded and has acquired
456 * the nodeid, if it is reset it will lose it all.
457 */
458 cops_reset(dev,1); /* Need to reset card before load firmware. */
459 cops_load(dev); /* Load the firmware. */
460
461 /*
462 * If atalkd already gave us a nodeid we will use that
463 * one again, else we wait for atalkd to give us a nodeid
464 * in cops_ioctl. This may cause a problem if someone steals
465 * our nodeid while we are resetting.
466 */
467 if(lp->nodeid == 1)
468 cops_nodeid(dev,lp->node_acquire);
469
470 return 0;
471}
472
473static void tangent_wait_reset(int ioaddr)
474{
475 int timeout=0;
476
477 while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
478 mdelay(1); /* Wait 1 second */
479}
480
481/*
482 * Reset the LocalTalk board.
483 */
484static void cops_reset(struct net_device *dev, int sleep)
485{
486 struct cops_local *lp = netdev_priv(dev);
487 int ioaddr=dev->base_addr;
488
489 if(lp->board==TANGENT)
490 {
491 inb(ioaddr); /* Clear request latch. */
492 outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */
493 outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */
494
495 tangent_wait_reset(ioaddr);
496 outb(0, ioaddr+TANG_CLEAR_INT);
497 }
498 if(lp->board==DAYNA)
499 {
500 outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */
501 inb(ioaddr+DAYNA_RESET); /* Clear the reset */
7ab267d4
JG		 502 if (sleep)
503 msleep(333);
504 else
505 mdelay(333);
1da177e4 506 }
7ab267d4 507
1da177e4 508 netif_wake_queue(dev);
1da177e4
LT		 509}
510
511static void cops_load (struct net_device *dev)
512{
513 struct ifreq ifr;
514 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru;
515 struct cops_local *lp = netdev_priv(dev);
516 int ioaddr=dev->base_addr;
517 int length, i = 0;
518
519 strcpy(ifr.ifr_name,"lt0");
520
521 /* Get card's firmware code and do some checks on it. */
522#ifdef CONFIG_COPS_DAYNA
523 if(lp->board==DAYNA)
524 {
525 ltf->length=sizeof(ffdrv_code);
526 ltf->data=ffdrv_code;
527 }
528 else
529#endif
530#ifdef CONFIG_COPS_TANGENT
531 if(lp->board==TANGENT)
532 {
533 ltf->length=sizeof(ltdrv_code);
534 ltf->data=ltdrv_code;
535 }
536 else
537#endif
538 {
539 printk(KERN_INFO "%s; unsupported board type.\n", dev->name);
540 return;
541 }
542
543 /* Check to make sure firmware is correct length. */
544 if(lp->board==DAYNA && ltf->length!=5983)
545 {
546 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name);
547 return;
548 }
549 if(lp->board==TANGENT && ltf->length!=2501)
550 {
551 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name);
552 return;
553 }
554
555 if(lp->board==DAYNA)
556 {
557 /*
558 * We must wait for a status response
559 * with the DAYNA board.
560 */
561 while(++i<65536)
562 {
563 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1)
564 break;
565 }
566
567 if(i==65536)
568 return;
569 }
570
571 /*
572 * Upload the firmware and kick. Byte-by-byte works nicely here.
573 */
574 i=0;
575 length = ltf->length;
576 while(length--)
577 {
578 outb(ltf->data[i], ioaddr);
579 i++;
580 }
581
582 if(cops_debug > 1)
583 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n",
584 dev->name, i, ltf->length);
585
586 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */
587 outb(1, ioaddr+DAYNA_INT_CARD);
588 else /* Tell Tang to run the firmware code. */
589 inb(ioaddr);
590
591 if(lp->board==TANGENT)
592 {
593 tangent_wait_reset(ioaddr);
594 inb(ioaddr); /* Clear initial ready signal. */
595 }
596
597 return;
598}
599
600/*
601 * Get the LocalTalk Nodeid from the card. We can suggest
602 * any nodeid 1-254. The card will try and get that exact
603 * address else we can specify 0 as the nodeid and the card
604 * will autoprobe for a nodeid.
605 */
606static int cops_nodeid (struct net_device *dev, int nodeid)
607{
608 struct cops_local *lp = netdev_priv(dev);
609 int ioaddr = dev->base_addr;
610
611 if(lp->board == DAYNA)
612 {
613 /* Empty any pending adapter responses. */
614 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
615 {
616 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */
617 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
618 cops_rx(dev); /* Kick any packets waiting. */
619 schedule();
620 }
621
622 outb(2, ioaddr); /* Output command packet length as 2. */
623 outb(0, ioaddr);
624 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */
625 outb(nodeid, ioaddr); /* Suggest node address. */
626 }
627
628 if(lp->board == TANGENT)
629 {
630 /* Empty any pending adapter responses. */
631 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
632 {
633 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */
634 cops_rx(dev); /* Kick out packets waiting. */
635 schedule();
636 }
637
638 /* Not sure what Tangent does if nodeid picked is used. */
639 if(nodeid == 0) /* Seed. */
640 nodeid = jiffies&0xFF; /* Get a random try */
641 outb(2, ioaddr); /* Command length LSB */
642 outb(0, ioaddr); /* Command length MSB */
643 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */
644 outb(nodeid, ioaddr); /* LAP address hint. */
645 outb(0xFF, ioaddr); /* Int. level to use */
646 }
647
648 lp->node_acquire=0; /* Set nodeid holder to 0. */
649 while(lp->node_acquire==0) /* Get *True* nodeid finally. */
650 {
651 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */
652
653 if(lp->board == DAYNA)
654 {
655 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
656 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
657 }
658 if(lp->board == TANGENT)
659 {
660 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
661 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
662 }
663 schedule();
664 }
665
666 if(cops_debug > 1)
667 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n",
668 dev->name, lp->node_acquire);
669
670 lp->nodeid=1; /* Set got nodeid to 1. */
671
672 return 0;
673}
674
675/*
676 * Poll the Tangent type cards to see if we have work.
677 */
678
679static void cops_poll(unsigned long ltdev)
680{
681 int ioaddr, status;
682 int boguscount = 0;
683
684 struct net_device *dev = (struct net_device *)ltdev;
685
686 del_timer(&cops_timer);
687
688 if(dev == NULL)
689 return; /* We've been downed */
690
691 ioaddr = dev->base_addr;
692 do {
693 status=inb(ioaddr+TANG_CARD_STATUS);
694 if(status & TANG_RX_READY)
695 cops_rx(dev);
696 if(status & TANG_TX_READY)
697 netif_wake_queue(dev);
698 status = inb(ioaddr+TANG_CARD_STATUS);
699 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
700
701 /* poll 20 times per second */
702 cops_timer.expires = jiffies + HZ/20;
703 add_timer(&cops_timer);
704
705 return;
706}
707
708/*
709 * The typical workload of the driver:
710 * Handle the network interface interrupts.
711 */
7d12e780 712static irqreturn_t cops_interrupt(int irq, void *dev_id)
1da177e4
LT		 713{
714 struct net_device *dev = dev_id;
715 struct cops_local *lp;
716 int ioaddr, status;
717 int boguscount = 0;
718
719 ioaddr = dev->base_addr;
720 lp = netdev_priv(dev);
721
722 if(lp->board==DAYNA)
723 {
724 do {
725 outb(0, ioaddr + COPS_CLEAR_INT);
726 status=inb(ioaddr+DAYNA_CARD_STATUS);
727 if((status&0x03)==DAYNA_RX_REQUEST)
728 cops_rx(dev);
729 netif_wake_queue(dev);
730 } while(++boguscount < 20);
731 }
732 else
733 {
734 do {
735 status=inb(ioaddr+TANG_CARD_STATUS);
736 if(status & TANG_RX_READY)
737 cops_rx(dev);
738 if(status & TANG_TX_READY)
739 netif_wake_queue(dev);
740 status=inb(ioaddr+TANG_CARD_STATUS);
741 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
742 }
743
744 return IRQ_HANDLED;
745}
746
747/*
748 * We have a good packet(s), get it/them out of the buffers.
749 */
750static void cops_rx(struct net_device *dev)
751{
752 int pkt_len = 0;
753 int rsp_type = 0;
754 struct sk_buff *skb = NULL;
755 struct cops_local *lp = netdev_priv(dev);
756 int ioaddr = dev->base_addr;
757 int boguscount = 0;
758 unsigned long flags;
759
760
761 spin_lock_irqsave(&lp->lock, flags);
762
763 if(lp->board==DAYNA)
764 {
765 outb(0, ioaddr); /* Send out Zero length. */
766 outb(0, ioaddr);
767 outb(DATA_READ, ioaddr); /* Send read command out. */
768
769 /* Wait for DMA to turn around. */
770 while(++boguscount<1000000)
771 {
772 barrier();
773 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY)
774 break;
775 }
776
777 if(boguscount==1000000)
778 {
779 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name);
780 spin_unlock_irqrestore(&lp->lock, flags);
781 return;
782 }
783 }
784
785 /* Get response length. */
786 if(lp->board==DAYNA)
787 pkt_len = inb(ioaddr) & 0xFF;
788 else
789 pkt_len = inb(ioaddr) & 0x00FF;
790 pkt_len |= (inb(ioaddr) << 8);
791 /* Input IO code. */
792 rsp_type=inb(ioaddr);
793
794 /* Malloc up new buffer. */
795 skb = dev_alloc_skb(pkt_len);
796 if(skb == NULL)
797 {
798 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n",
799 dev->name);
8bbce3f6 800 dev->stats.rx_dropped++;
1da177e4
LT		 801 while(pkt_len--) /* Discard packet */
802 inb(ioaddr);
803 spin_unlock_irqrestore(&lp->lock, flags);
804 return;
805 }
806 skb->dev = dev;
807 skb_put(skb, pkt_len);
808 skb->protocol = htons(ETH_P_LOCALTALK);
809
810 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */
811
812 if(lp->board==DAYNA)
813 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */
814
815 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
816
817 /* Check for bad response length */
818 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE)
819 {
820 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n",
821 dev->name, pkt_len);
8bbce3f6 822 dev->stats.tx_errors++;
1da177e4
LT		 823 dev_kfree_skb_any(skb);
824 return;
825 }
826
827 /* Set nodeid and then get out. */
828 if(rsp_type == LAP_INIT_RSP)
829 { /* Nodeid taken from received packet. */
830 lp->node_acquire = skb->data[0];
831 dev_kfree_skb_any(skb);
832 return;
833 }
834
835 /* One last check to make sure we have a good packet. */
836 if(rsp_type != LAP_RESPONSE)
837 {
838 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type);
8bbce3f6 839 dev->stats.tx_errors++;
1da177e4
LT		 840 dev_kfree_skb_any(skb);
841 return;
842 }
843
459a98ed 844 skb_reset_mac_header(skb); /* Point to entire packet. */
1da177e4 845 skb_pull(skb,3);
badff6d0 846 skb_reset_transport_header(skb); /* Point to data (Skip header). */
1da177e4
LT		 847
848 /* Update the counters. */
8bbce3f6
SH		 849 dev->stats.rx_packets++;
850 dev->stats.rx_bytes += skb->len;
1da177e4
LT		 851
852 /* Send packet to a higher place. */
853 netif_rx(skb);
1da177e4
LT		 854}
855
856static void cops_timeout(struct net_device *dev)
857{
858 struct cops_local *lp = netdev_priv(dev);
859 int ioaddr = dev->base_addr;
860
8bbce3f6 861 dev->stats.tx_errors++;
1da177e4
LT		 862 if(lp->board==TANGENT)
863 {
864 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
865 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name);
866 }
867 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name);
868 cops_jumpstart(dev); /* Restart the card. */
869 dev->trans_start = jiffies;
870 netif_wake_queue(dev);
871}
872
873
874/*
875 * Make the card transmit a LocalTalk packet.
876 */
877
0fc48098
SH		 878static netdev_tx_t cops_send_packet(struct sk_buff *skb,
879 struct net_device *dev)
1da177e4
LT		 880{
881 struct cops_local *lp = netdev_priv(dev);
882 int ioaddr = dev->base_addr;
883 unsigned long flags;
884
885 /*
886 * Block a timer-based transmit from overlapping.
887 */
888
889 netif_stop_queue(dev);
890
891 spin_lock_irqsave(&lp->lock, flags);
892 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */
893 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
894 cpu_relax();
895 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */
896 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
897 cpu_relax();
898
899 /* Output IO length. */
900 outb(skb->len, ioaddr);
901 if(lp->board == DAYNA)
902 outb(skb->len >> 8, ioaddr);
903 else
904 outb((skb->len >> 8)&0x0FF, ioaddr);
905
906 /* Output IO code. */
907 outb(LAP_WRITE, ioaddr);
908
909 if(lp->board == DAYNA) /* Check the transmit buffer again. */
910 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0);
911
912 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */
913
914 if(lp->board==DAYNA) /* Dayna requires you kick the card */
915 outb(1, ioaddr+DAYNA_INT_CARD);
916
917 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
918
919 /* Done sending packet, update counters and cleanup. */
8bbce3f6
SH		 920 dev->stats.tx_packets++;
921 dev->stats.tx_bytes += skb->len;
1da177e4
LT		 922 dev->trans_start = jiffies;
923 dev_kfree_skb (skb);
6ed10654 924 return NETDEV_TX_OK;
1da177e4
LT		 925}
926
927/*
928 * Dummy function to keep the Appletalk layer happy.
929 */
930
931static void set_multicast_list(struct net_device *dev)
932{
933 if(cops_debug >= 3)
934 printk("%s: set_multicast_list executed\n", dev->name);
935}
936
1da177e4
LT		 937/*
938 * System ioctls for the COPS LocalTalk card.
939 */
940
941static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
942{
943 struct cops_local *lp = netdev_priv(dev);
944 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr;
945 struct atalk_addr *aa = (struct atalk_addr *)&lp->node_addr;
946
947 switch(cmd)
948 {
949 case SIOCSIFADDR:
950 /* Get and set the nodeid and network # atalkd wants. */
951 cops_nodeid(dev, sa->sat_addr.s_node);
952 aa->s_net = sa->sat_addr.s_net;
953 aa->s_node = lp->node_acquire;
954
955 /* Set broardcast address. */
956 dev->broadcast[0] = 0xFF;
957
958 /* Set hardware address. */
959 dev->dev_addr[0] = aa->s_node;
960 dev->addr_len = 1;
961 return 0;
962
963 case SIOCGIFADDR:
964 sa->sat_addr.s_net = aa->s_net;
965 sa->sat_addr.s_node = aa->s_node;
966 return 0;
967
968 default:
969 return -EOPNOTSUPP;
970 }
971}
972
973/*
974 * The inverse routine to cops_open().
975 */
976
977static int cops_close(struct net_device *dev)
978{
979 struct cops_local *lp = netdev_priv(dev);
980
981 /* If we were running polled, yank the timer.
982 */
983 if(lp->board==TANGENT && dev->irq==0)
984 del_timer(&cops_timer);
985
986 netif_stop_queue(dev);
987 return 0;
988}
989
1da177e4
LT		 990
991#ifdef MODULE
992static struct net_device *cops_dev;
993
994MODULE_LICENSE("GPL");
995module_param(io, int, 0);
996module_param(irq, int, 0);
997module_param(board_type, int, 0);
998
b32dac08 999static int __init cops_module_init(void)
1da177e4
LT		 1000{
1001 if (io == 0)
1002 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n",
1003 cardname);
1004 cops_dev = cops_probe(-1);
1005 if (IS_ERR(cops_dev))
1006 return PTR_ERR(cops_dev);
1007 return 0;
1008}
1009
b32dac08 1010static void __exit cops_module_exit(void)
1da177e4
LT		 1011{
1012 unregister_netdev(cops_dev);
1013 cleanup_card(cops_dev);
1014 free_netdev(cops_dev);
1015}
b32dac08
JS		 1016module_init(cops_module_init);
1017module_exit(cops_module_exit);
1da177e4 1018#endif /* MODULE */
kernel source for telekom puls (alcatel/mediatek)