ARM: 7409/1: Do not call flush_cache_user_range with mmap_sem held
[linux/fpc-iii.git] / drivers / net / appletalk / cops.c
blob748c9f526e713274d8d3c722bd321c0a0e845e28
1 /* cops.c: LocalTalk driver for Linux.
3 * Authors:
4 * - Jay Schulist <jschlst@samba.org>
6 * With more than a little help from;
7 * - Alan Cox <alan@lxorguk.ukuu.org.uk>
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.
15 * Copyright 1993 United States Government as represented by the
16 * Director, National Security Agency.
18 * This software may be used and distributed according to the terms
19 * of the GNU General Public License, incorporated herein by reference.
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
36 static const char *version =
37 "cops.c:v0.04 6/7/98 Jay Schulist <jschlst@samba.org>\n";
39 * Sources:
40 * COPS Localtalk SDK. This provides almost all of the information
41 * needed.
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.
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>
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>
66 #include <linux/if_ltalk.h>
67 #include <linux/delay.h> /* For udelay() */
68 #include <linux/atalk.h>
69 #include <linux/spinlock.h>
70 #include <linux/bitops.h>
71 #include <linux/jiffies.h>
73 #include <asm/system.h>
74 #include <asm/io.h>
75 #include <asm/dma.h>
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. */
82 * The name of the card. Is used for messages and in the requests for
83 * io regions, irqs and dma channels
86 static const char *cardname = "cops";
88 #ifdef CONFIG_COPS_DAYNA
89 static int board_type = DAYNA; /* Module exported */
90 #else
91 static int board_type = TANGENT;
92 #endif
94 static int io = 0x240; /* Default IO for Dayna */
95 static int irq = 5; /* Default IRQ */
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.
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.
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
122 * Other cards possibly supported mode unknown though:
123 * Dayna DL2000 (Full length), COPS LT/M (Micro-Channel)
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
130 * N.B.
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.
141 * Zero terminated list of IO ports to probe.
144 static unsigned int ports[] = {
145 0x240, 0x340, 0x200, 0x210, 0x220, 0x230, 0x260,
146 0x2A0, 0x300, 0x310, 0x320, 0x330, 0x350, 0x360,
151 * Zero terminated list of IRQ ports to probe.
154 static int cops_irqlist[] = {
155 5, 4, 3, 0
158 static struct timer_list cops_timer;
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
164 static unsigned int cops_debug = COPS_DEBUG;
166 /* The number of low I/O ports used by the card. */
167 #define COPS_IO_EXTENT 8
169 /* Information that needs to be kept for each board. */
171 struct cops_local
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 */
180 /* Index to functions, as function prototypes. */
181 static int cops_probe1 (struct net_device *dev, int ioaddr);
182 static int cops_irq (int ioaddr, int board);
184 static int cops_open (struct net_device *dev);
185 static int cops_jumpstart (struct net_device *dev);
186 static void cops_reset (struct net_device *dev, int sleep);
187 static void cops_load (struct net_device *dev);
188 static int cops_nodeid (struct net_device *dev, int nodeid);
190 static irqreturn_t cops_interrupt (int irq, void *dev_id);
191 static void cops_poll (unsigned long ltdev);
192 static void cops_timeout(struct net_device *dev);
193 static void cops_rx (struct net_device *dev);
194 static netdev_tx_t cops_send_packet (struct sk_buff *skb,
195 struct net_device *dev);
196 static void set_multicast_list (struct net_device *dev);
197 static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
198 static int cops_close (struct net_device *dev);
200 static void cleanup_card(struct net_device *dev)
202 if (dev->irq)
203 free_irq(dev->irq, dev);
204 release_region(dev->base_addr, COPS_IO_EXTENT);
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.
213 struct net_device * __init cops_probe(int unit)
215 struct net_device *dev;
216 unsigned *port;
217 int base_addr;
218 int err = 0;
220 dev = alloc_ltalkdev(sizeof(struct cops_local));
221 if (!dev)
222 return ERR_PTR(-ENOMEM);
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;
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
243 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++)
245 if (!*port)
246 err = -ENODEV;
248 if (err)
249 goto out;
250 err = register_netdev(dev);
251 if (err)
252 goto out1;
253 return dev;
254 out1:
255 cleanup_card(dev);
256 out:
257 free_netdev(dev);
258 return ERR_PTR(err);
261 static 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,
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.
275 static int __init cops_probe1(struct net_device *dev, int ioaddr)
277 struct cops_local *lp;
278 static unsigned version_printed;
279 int board = board_type;
280 int retval;
282 if(cops_debug && version_printed++ == 0)
283 printk("%s", version);
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;
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.
296 dev->irq = irq;
297 switch (dev->irq)
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;
309 /* Fixup for users that don't know that IRQ 2 is really
310 * IRQ 9, or don't know which one to set.
312 case 2:
313 dev->irq = 9;
314 break;
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.
320 case 0xff:
321 dev->irq = 0;
322 break;
324 default:
325 break;
328 /* Reserve any actual interrupt. */
329 if (dev->irq) {
330 retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev);
331 if (retval)
332 goto err_out;
335 dev->base_addr = ioaddr;
337 lp = netdev_priv(dev);
338 spin_lock_init(&lp->lock);
340 /* Copy local board variable to lp struct. */
341 lp->board = board;
343 dev->netdev_ops = &cops_netdev_ops;
344 dev->watchdog_timeo = HZ * 2;
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);
360 return 0;
362 err_out:
363 release_region(ioaddr, COPS_IO_EXTENT);
364 return retval;
367 static 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.
375 int irqaddr=0;
376 int i, x, status;
378 if(board==DAYNA)
380 outb(0, ioaddr+DAYNA_RESET);
381 inb(ioaddr+DAYNA_RESET);
382 mdelay(333);
384 if(board==TANGENT)
386 inb(ioaddr);
387 outb(0, ioaddr);
388 outb(0, ioaddr+TANG_RESET);
391 for(i=0; cops_irqlist[i] !=0; i++)
393 irqaddr = cops_irqlist[i];
394 for(x = 0xFFFF; x>0; x --) /* wait for response */
396 if(board==DAYNA)
398 status = (inb(ioaddr+DAYNA_CARD_STATUS)&3);
399 if(status == 1)
400 return irqaddr;
402 if(board==TANGENT)
404 if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0)
405 return irqaddr;
409 return 0; /* no IRQ found */
413 * Open/initialize the board. This is called (in the current kernel)
414 * sometime after booting when the 'ifconfig' program is run.
416 static int cops_open(struct net_device *dev)
418 struct cops_local *lp = netdev_priv(dev);
420 if(dev->irq==0)
423 * I don't know if the Dayna-style boards support polled
424 * operation. For now, only allow it for Tangent.
426 if(lp->board==TANGENT) /* Poll 20 times per second */
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);
434 else
436 printk(KERN_WARNING "%s: No irq line set\n", dev->name);
437 return -EAGAIN;
441 cops_jumpstart(dev); /* Start the card up. */
443 netif_start_queue(dev);
444 return 0;
448 * This allows for a dynamic start/restart of the entire card.
450 static int cops_jumpstart(struct net_device *dev)
452 struct cops_local *lp = netdev_priv(dev);
455 * Once the card has the firmware loaded and has acquired
456 * the nodeid, if it is reset it will lose it all.
458 cops_reset(dev,1); /* Need to reset card before load firmware. */
459 cops_load(dev); /* Load the firmware. */
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.
467 if(lp->nodeid == 1)
468 cops_nodeid(dev,lp->node_acquire);
470 return 0;
473 static void tangent_wait_reset(int ioaddr)
475 int timeout=0;
477 while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
478 mdelay(1); /* Wait 1 second */
482 * Reset the LocalTalk board.
484 static void cops_reset(struct net_device *dev, int sleep)
486 struct cops_local *lp = netdev_priv(dev);
487 int ioaddr=dev->base_addr;
489 if(lp->board==TANGENT)
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. */
495 tangent_wait_reset(ioaddr);
496 outb(0, ioaddr+TANG_CLEAR_INT);
498 if(lp->board==DAYNA)
500 outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */
501 inb(ioaddr+DAYNA_RESET); /* Clear the reset */
502 if (sleep)
503 msleep(333);
504 else
505 mdelay(333);
508 netif_wake_queue(dev);
511 static void cops_load (struct net_device *dev)
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;
519 strcpy(ifr.ifr_name,"lt0");
521 /* Get card's firmware code and do some checks on it. */
522 #ifdef CONFIG_COPS_DAYNA
523 if(lp->board==DAYNA)
525 ltf->length=sizeof(ffdrv_code);
526 ltf->data=ffdrv_code;
528 else
529 #endif
530 #ifdef CONFIG_COPS_TANGENT
531 if(lp->board==TANGENT)
533 ltf->length=sizeof(ltdrv_code);
534 ltf->data=ltdrv_code;
536 else
537 #endif
539 printk(KERN_INFO "%s; unsupported board type.\n", dev->name);
540 return;
543 /* Check to make sure firmware is correct length. */
544 if(lp->board==DAYNA && ltf->length!=5983)
546 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name);
547 return;
549 if(lp->board==TANGENT && ltf->length!=2501)
551 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name);
552 return;
555 if(lp->board==DAYNA)
558 * We must wait for a status response
559 * with the DAYNA board.
561 while(++i<65536)
563 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1)
564 break;
567 if(i==65536)
568 return;
572 * Upload the firmware and kick. Byte-by-byte works nicely here.
574 i=0;
575 length = ltf->length;
576 while(length--)
578 outb(ltf->data[i], ioaddr);
579 i++;
582 if(cops_debug > 1)
583 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n",
584 dev->name, i, ltf->length);
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);
591 if(lp->board==TANGENT)
593 tangent_wait_reset(ioaddr);
594 inb(ioaddr); /* Clear initial ready signal. */
599 * Get the LocalTalk Nodeid from the card. We can suggest
600 * any nodeid 1-254. The card will try and get that exact
601 * address else we can specify 0 as the nodeid and the card
602 * will autoprobe for a nodeid.
604 static int cops_nodeid (struct net_device *dev, int nodeid)
606 struct cops_local *lp = netdev_priv(dev);
607 int ioaddr = dev->base_addr;
609 if(lp->board == DAYNA)
611 /* Empty any pending adapter responses. */
612 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
614 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */
615 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
616 cops_rx(dev); /* Kick any packets waiting. */
617 schedule();
620 outb(2, ioaddr); /* Output command packet length as 2. */
621 outb(0, ioaddr);
622 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */
623 outb(nodeid, ioaddr); /* Suggest node address. */
626 if(lp->board == TANGENT)
628 /* Empty any pending adapter responses. */
629 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
631 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */
632 cops_rx(dev); /* Kick out packets waiting. */
633 schedule();
636 /* Not sure what Tangent does if nodeid picked is used. */
637 if(nodeid == 0) /* Seed. */
638 nodeid = jiffies&0xFF; /* Get a random try */
639 outb(2, ioaddr); /* Command length LSB */
640 outb(0, ioaddr); /* Command length MSB */
641 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */
642 outb(nodeid, ioaddr); /* LAP address hint. */
643 outb(0xFF, ioaddr); /* Int. level to use */
646 lp->node_acquire=0; /* Set nodeid holder to 0. */
647 while(lp->node_acquire==0) /* Get *True* nodeid finally. */
649 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */
651 if(lp->board == DAYNA)
653 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST)
654 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
656 if(lp->board == TANGENT)
658 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY)
659 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */
661 schedule();
664 if(cops_debug > 1)
665 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n",
666 dev->name, lp->node_acquire);
668 lp->nodeid=1; /* Set got nodeid to 1. */
670 return 0;
674 * Poll the Tangent type cards to see if we have work.
677 static void cops_poll(unsigned long ltdev)
679 int ioaddr, status;
680 int boguscount = 0;
682 struct net_device *dev = (struct net_device *)ltdev;
684 del_timer(&cops_timer);
686 if(dev == NULL)
687 return; /* We've been downed */
689 ioaddr = dev->base_addr;
690 do {
691 status=inb(ioaddr+TANG_CARD_STATUS);
692 if(status & TANG_RX_READY)
693 cops_rx(dev);
694 if(status & TANG_TX_READY)
695 netif_wake_queue(dev);
696 status = inb(ioaddr+TANG_CARD_STATUS);
697 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
699 /* poll 20 times per second */
700 cops_timer.expires = jiffies + HZ/20;
701 add_timer(&cops_timer);
705 * The typical workload of the driver:
706 * Handle the network interface interrupts.
708 static irqreturn_t cops_interrupt(int irq, void *dev_id)
710 struct net_device *dev = dev_id;
711 struct cops_local *lp;
712 int ioaddr, status;
713 int boguscount = 0;
715 ioaddr = dev->base_addr;
716 lp = netdev_priv(dev);
718 if(lp->board==DAYNA)
720 do {
721 outb(0, ioaddr + COPS_CLEAR_INT);
722 status=inb(ioaddr+DAYNA_CARD_STATUS);
723 if((status&0x03)==DAYNA_RX_REQUEST)
724 cops_rx(dev);
725 netif_wake_queue(dev);
726 } while(++boguscount < 20);
728 else
730 do {
731 status=inb(ioaddr+TANG_CARD_STATUS);
732 if(status & TANG_RX_READY)
733 cops_rx(dev);
734 if(status & TANG_TX_READY)
735 netif_wake_queue(dev);
736 status=inb(ioaddr+TANG_CARD_STATUS);
737 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY)));
740 return IRQ_HANDLED;
744 * We have a good packet(s), get it/them out of the buffers.
746 static void cops_rx(struct net_device *dev)
748 int pkt_len = 0;
749 int rsp_type = 0;
750 struct sk_buff *skb = NULL;
751 struct cops_local *lp = netdev_priv(dev);
752 int ioaddr = dev->base_addr;
753 int boguscount = 0;
754 unsigned long flags;
757 spin_lock_irqsave(&lp->lock, flags);
759 if(lp->board==DAYNA)
761 outb(0, ioaddr); /* Send out Zero length. */
762 outb(0, ioaddr);
763 outb(DATA_READ, ioaddr); /* Send read command out. */
765 /* Wait for DMA to turn around. */
766 while(++boguscount<1000000)
768 barrier();
769 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY)
770 break;
773 if(boguscount==1000000)
775 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name);
776 spin_unlock_irqrestore(&lp->lock, flags);
777 return;
781 /* Get response length. */
782 if(lp->board==DAYNA)
783 pkt_len = inb(ioaddr) & 0xFF;
784 else
785 pkt_len = inb(ioaddr) & 0x00FF;
786 pkt_len |= (inb(ioaddr) << 8);
787 /* Input IO code. */
788 rsp_type=inb(ioaddr);
790 /* Malloc up new buffer. */
791 skb = dev_alloc_skb(pkt_len);
792 if(skb == NULL)
794 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n",
795 dev->name);
796 dev->stats.rx_dropped++;
797 while(pkt_len--) /* Discard packet */
798 inb(ioaddr);
799 spin_unlock_irqrestore(&lp->lock, flags);
800 return;
802 skb->dev = dev;
803 skb_put(skb, pkt_len);
804 skb->protocol = htons(ETH_P_LOCALTALK);
806 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */
808 if(lp->board==DAYNA)
809 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */
811 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
813 /* Check for bad response length */
814 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE)
816 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n",
817 dev->name, pkt_len);
818 dev->stats.tx_errors++;
819 dev_kfree_skb_any(skb);
820 return;
823 /* Set nodeid and then get out. */
824 if(rsp_type == LAP_INIT_RSP)
825 { /* Nodeid taken from received packet. */
826 lp->node_acquire = skb->data[0];
827 dev_kfree_skb_any(skb);
828 return;
831 /* One last check to make sure we have a good packet. */
832 if(rsp_type != LAP_RESPONSE)
834 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type);
835 dev->stats.tx_errors++;
836 dev_kfree_skb_any(skb);
837 return;
840 skb_reset_mac_header(skb); /* Point to entire packet. */
841 skb_pull(skb,3);
842 skb_reset_transport_header(skb); /* Point to data (Skip header). */
844 /* Update the counters. */
845 dev->stats.rx_packets++;
846 dev->stats.rx_bytes += skb->len;
848 /* Send packet to a higher place. */
849 netif_rx(skb);
852 static void cops_timeout(struct net_device *dev)
854 struct cops_local *lp = netdev_priv(dev);
855 int ioaddr = dev->base_addr;
857 dev->stats.tx_errors++;
858 if(lp->board==TANGENT)
860 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
861 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name);
863 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name);
864 cops_jumpstart(dev); /* Restart the card. */
865 dev->trans_start = jiffies; /* prevent tx timeout */
866 netif_wake_queue(dev);
871 * Make the card transmit a LocalTalk packet.
874 static netdev_tx_t cops_send_packet(struct sk_buff *skb,
875 struct net_device *dev)
877 struct cops_local *lp = netdev_priv(dev);
878 int ioaddr = dev->base_addr;
879 unsigned long flags;
882 * Block a timer-based transmit from overlapping.
885 netif_stop_queue(dev);
887 spin_lock_irqsave(&lp->lock, flags);
888 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */
889 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0)
890 cpu_relax();
891 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */
892 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0)
893 cpu_relax();
895 /* Output IO length. */
896 outb(skb->len, ioaddr);
897 if(lp->board == DAYNA)
898 outb(skb->len >> 8, ioaddr);
899 else
900 outb((skb->len >> 8)&0x0FF, ioaddr);
902 /* Output IO code. */
903 outb(LAP_WRITE, ioaddr);
905 if(lp->board == DAYNA) /* Check the transmit buffer again. */
906 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0);
908 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */
910 if(lp->board==DAYNA) /* Dayna requires you kick the card */
911 outb(1, ioaddr+DAYNA_INT_CARD);
913 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */
915 /* Done sending packet, update counters and cleanup. */
916 dev->stats.tx_packets++;
917 dev->stats.tx_bytes += skb->len;
918 dev_kfree_skb (skb);
919 return NETDEV_TX_OK;
923 * Dummy function to keep the Appletalk layer happy.
926 static void set_multicast_list(struct net_device *dev)
928 if(cops_debug >= 3)
929 printk("%s: set_multicast_list executed\n", dev->name);
933 * System ioctls for the COPS LocalTalk card.
936 static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
938 struct cops_local *lp = netdev_priv(dev);
939 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr;
940 struct atalk_addr *aa = (struct atalk_addr *)&lp->node_addr;
942 switch(cmd)
944 case SIOCSIFADDR:
945 /* Get and set the nodeid and network # atalkd wants. */
946 cops_nodeid(dev, sa->sat_addr.s_node);
947 aa->s_net = sa->sat_addr.s_net;
948 aa->s_node = lp->node_acquire;
950 /* Set broardcast address. */
951 dev->broadcast[0] = 0xFF;
953 /* Set hardware address. */
954 dev->dev_addr[0] = aa->s_node;
955 dev->addr_len = 1;
956 return 0;
958 case SIOCGIFADDR:
959 sa->sat_addr.s_net = aa->s_net;
960 sa->sat_addr.s_node = aa->s_node;
961 return 0;
963 default:
964 return -EOPNOTSUPP;
969 * The inverse routine to cops_open().
972 static int cops_close(struct net_device *dev)
974 struct cops_local *lp = netdev_priv(dev);
976 /* If we were running polled, yank the timer.
978 if(lp->board==TANGENT && dev->irq==0)
979 del_timer(&cops_timer);
981 netif_stop_queue(dev);
982 return 0;
986 #ifdef MODULE
987 static struct net_device *cops_dev;
989 MODULE_LICENSE("GPL");
990 module_param(io, int, 0);
991 module_param(irq, int, 0);
992 module_param(board_type, int, 0);
994 static int __init cops_module_init(void)
996 if (io == 0)
997 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n",
998 cardname);
999 cops_dev = cops_probe(-1);
1000 if (IS_ERR(cops_dev))
1001 return PTR_ERR(cops_dev);
1002 return 0;
1005 static void __exit cops_module_exit(void)
1007 unregister_netdev(cops_dev);
1008 cleanup_card(cops_dev);
1009 free_netdev(cops_dev);
1011 module_init(cops_module_init);
1012 module_exit(cops_module_exit);
1013 #endif /* MODULE */