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; 7 * - Alan Cox <alan@lxorguk.ukuu.org.uk> 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 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> 72 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 85static const char *cardname = "cops"; 86 87#ifdef CONFIG_COPS_DAYNA 88static int board_type = DAYNA; /* Module exported */ 89#else 90static int board_type = TANGENT; 91#endif 92 93static int io = 0x240; /* Default IO for Dayna */ 94static 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 121 * Other cards possibly supported mode unknown though: 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 143static 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 153static int cops_irqlist[] = { 154 5, 4, 3, 0 155}; 156 157static 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 163static 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 170struct cops_local 171{ 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. */ 180static int cops_probe1 (struct net_device *dev, int ioaddr); 181static int cops_irq (int ioaddr, int board); 182 183static int cops_open (struct net_device *dev); 184static int cops_jumpstart (struct net_device *dev); 185static void cops_reset (struct net_device *dev, int sleep); 186static void cops_load (struct net_device *dev); 187static int cops_nodeid (struct net_device *dev, int nodeid); 188 189static irqreturn_t cops_interrupt (int irq, void *dev_id); 190static void cops_poll (unsigned long ltdev); 191static void cops_timeout(struct net_device *dev); 192static void cops_rx (struct net_device *dev); 193static netdev_tx_t cops_send_packet (struct sk_buff *skb, 194 struct net_device *dev); 195static void set_multicast_list (struct net_device *dev); 196static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd); 197static int cops_close (struct net_device *dev); 198 199static 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 */ 212struct net_device * __init cops_probe(int unit) 213{ 214 struct net_device *dev; 215 unsigned *port; 216 int base_addr; 217 int err = 0; 218 219 dev = alloc_ltalkdev(sizeof(struct cops_local)); 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 } 231 232 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; 253out1: 254 cleanup_card(dev); 255out: 256 free_netdev(dev); 257 return ERR_PTR(err); 258} 259 260static 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, 266 .ndo_set_rx_mode = set_multicast_list, 267}; 268 269/* 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 */ 274static 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) { 329 retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev); 330 if (retval) 331 goto err_out; 332 } 333 334 dev->base_addr = ioaddr; 335 336 lp = netdev_priv(dev); 337 spin_lock_init(&lp->lock); 338 339 /* Copy local board variable to lp struct. */ 340 lp->board = board; 341 342 dev->netdev_ops = &cops_netdev_ops; 343 dev->watchdog_timeo = HZ * 2; 344 345 346 /* 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 361err_out: 362 release_region(ioaddr, COPS_IO_EXTENT); 363 return retval; 364} 365 366static 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 */ 415static 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 */ 449static 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 472static 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 */ 483static 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 */ 501 if (sleep) 502 msleep(333); 503 else 504 mdelay(333); 505 } 506 507 netif_wake_queue(dev); 508} 509 510static 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 } 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 */ 603static 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 676static 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); 701} 702 703/* 704 * The typical workload of the driver: 705 * Handle the network interface interrupts. 706 */ 707static irqreturn_t cops_interrupt(int irq, void *dev_id) 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 */ 745static 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); 795 dev->stats.rx_dropped++; 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); 817 dev->stats.tx_errors++; 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); 834 dev->stats.tx_errors++; 835 dev_kfree_skb_any(skb); 836 return; 837 } 838 839 skb_reset_mac_header(skb); /* Point to entire packet. */ 840 skb_pull(skb,3); 841 skb_reset_transport_header(skb); /* Point to data (Skip header). */ 842 843 /* Update the counters. */ 844 dev->stats.rx_packets++; 845 dev->stats.rx_bytes += skb->len; 846 847 /* Send packet to a higher place. */ 848 netif_rx(skb); 849} 850 851static void cops_timeout(struct net_device *dev) 852{ 853 struct cops_local *lp = netdev_priv(dev); 854 int ioaddr = dev->base_addr; 855 856 dev->stats.tx_errors++; 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. */ 864 dev->trans_start = jiffies; /* prevent tx timeout */ 865 netif_wake_queue(dev); 866} 867 868 869/* 870 * Make the card transmit a LocalTalk packet. 871 */ 872 873static netdev_tx_t cops_send_packet(struct sk_buff *skb, 874 struct net_device *dev) 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. */ 915 dev->stats.tx_packets++; 916 dev->stats.tx_bytes += skb->len; 917 dev_kfree_skb (skb); 918 return NETDEV_TX_OK; 919} 920 921/* 922 * Dummy function to keep the Appletalk layer happy. 923 */ 924 925static 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} 930 931/* 932 * System ioctls for the COPS LocalTalk card. 933 */ 934 935static 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; 939 struct atalk_addr *aa = &lp->node_addr; 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 971static 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} 983 984 985#ifdef MODULE 986static struct net_device *cops_dev; 987 988MODULE_LICENSE("GPL"); 989module_param(io, int, 0); 990module_param(irq, int, 0); 991module_param(board_type, int, 0); 992 993static int __init cops_module_init(void) 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); 999 return PTR_ERR_OR_ZERO(cops_dev); 1000} 1001 1002static void __exit cops_module_exit(void) 1003{ 1004 unregister_netdev(cops_dev); 1005 cleanup_card(cops_dev); 1006 free_netdev(cops_dev); 1007} 1008module_init(cops_module_init); 1009module_exit(cops_module_exit); 1010#endif /* MODULE */ 1011