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