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.Cox@linux.org> 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/slab.h> 60#include <linux/string.h> 61#include <linux/errno.h> 62#include <linux/init.h> 63#include <linux/netdevice.h> 64#include <linux/etherdevice.h> 65#include <linux/skbuff.h> 66#include <linux/if_arp.h> 67#include <linux/if_ltalk.h> 68#include <linux/delay.h> /* For udelay() */ 69#include <linux/atalk.h> 70#include <linux/spinlock.h> 71#include <linux/bitops.h> 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 122 * Other cards possibly supported mode unkown though: 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{ 173 struct net_device_stats stats; 174 int board; /* Holds what board type is. */ 175 int nodeid; /* Set to 1 once have nodeid. */ 176 unsigned char node_acquire; /* Node ID when acquired. */ 177 struct atalk_addr node_addr; /* Full node address */ 178 spinlock_t lock; /* RX/TX lock */ 179}; 180 181/* Index to functions, as function prototypes. */ 182static int cops_probe1 (struct net_device *dev, int ioaddr); 183static int cops_irq (int ioaddr, int board); 184 185static int cops_open (struct net_device *dev); 186static int cops_jumpstart (struct net_device *dev); 187static void cops_reset (struct net_device *dev, int sleep); 188static void cops_load (struct net_device *dev); 189static int cops_nodeid (struct net_device *dev, int nodeid); 190 191static irqreturn_t cops_interrupt (int irq, void *dev_id); 192static void cops_poll (unsigned long ltdev); 193static void cops_timeout(struct net_device *dev); 194static void cops_rx (struct net_device *dev); 195static int cops_send_packet (struct sk_buff *skb, struct net_device *dev); 196static void set_multicast_list (struct net_device *dev); 197static int cops_hard_header (struct sk_buff *skb, struct net_device *dev, 198 unsigned short type, void *daddr, void *saddr, 199 unsigned len); 200 201static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd); 202static int cops_close (struct net_device *dev); 203static struct net_device_stats *cops_get_stats (struct net_device *dev); 204 205static void cleanup_card(struct net_device *dev) 206{ 207 if (dev->irq) 208 free_irq(dev->irq, dev); 209 release_region(dev->base_addr, COPS_IO_EXTENT); 210} 211 212/* 213 * Check for a network adaptor of this type, and return '0' iff one exists. 214 * If dev->base_addr == 0, probe all likely locations. 215 * If dev->base_addr in [1..0x1ff], always return failure. 216 * otherwise go with what we pass in. 217 */ 218struct net_device * __init cops_probe(int unit) 219{ 220 struct net_device *dev; 221 unsigned *port; 222 int base_addr; 223 int err = 0; 224 225 dev = alloc_ltalkdev(sizeof(struct cops_local)); 226 if (!dev) 227 return ERR_PTR(-ENOMEM); 228 229 if (unit >= 0) { 230 sprintf(dev->name, "lt%d", unit); 231 netdev_boot_setup_check(dev); 232 irq = dev->irq; 233 base_addr = dev->base_addr; 234 } else { 235 base_addr = dev->base_addr = io; 236 } 237 238 SET_MODULE_OWNER(dev); 239 240 if (base_addr > 0x1ff) { /* Check a single specified location. */ 241 err = cops_probe1(dev, base_addr); 242 } else if (base_addr != 0) { /* Don't probe at all. */ 243 err = -ENXIO; 244 } else { 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} 262 263/* 264 * This is the real probe routine. Linux has a history of friendly device 265 * probes on the ISA bus. A good device probes avoids doing writes, and 266 * verifies that the correct device exists and functions. 267 */ 268static int __init cops_probe1(struct net_device *dev, int ioaddr) 269{ 270 struct cops_local *lp; 271 static unsigned version_printed; 272 int board = board_type; 273 int retval; 274 275 if(cops_debug && version_printed++ == 0) 276 printk("%s", version); 277 278 /* Grab the region so no one else tries to probe our ioports. */ 279 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name)) 280 return -EBUSY; 281 282 /* 283 * Since this board has jumpered interrupts, allocate the interrupt 284 * vector now. There is no point in waiting since no other device 285 * can use the interrupt, and this marks the irq as busy. Jumpered 286 * interrupts are typically not reported by the boards, and we must 287 * used AutoIRQ to find them. 288 */ 289 dev->irq = irq; 290 switch (dev->irq) 291 { 292 case 0: 293 /* COPS AutoIRQ routine */ 294 dev->irq = cops_irq(ioaddr, board); 295 if (dev->irq) 296 break; 297 /* No IRQ found on this port, fallthrough */ 298 case 1: 299 retval = -EINVAL; 300 goto err_out; 301 302 /* Fixup for users that don't know that IRQ 2 is really 303 * IRQ 9, or don't know which one to set. 304 */ 305 case 2: 306 dev->irq = 9; 307 break; 308 309 /* Polled operation requested. Although irq of zero passed as 310 * a parameter tells the init routines to probe, we'll 311 * overload it to denote polled operation at runtime. 312 */ 313 case 0xff: 314 dev->irq = 0; 315 break; 316 317 default: 318 break; 319 } 320 321 /* Reserve any actual interrupt. */ 322 if (dev->irq) { 323 retval = request_irq(dev->irq, &cops_interrupt, 0, dev->name, dev); 324 if (retval) 325 goto err_out; 326 } 327 328 dev->base_addr = ioaddr; 329 330 lp = netdev_priv(dev); 331 memset(lp, 0, sizeof(struct cops_local)); 332 spin_lock_init(&lp->lock); 333 334 /* Copy local board variable to lp struct. */ 335 lp->board = board; 336 337 dev->hard_start_xmit = cops_send_packet; 338 dev->tx_timeout = cops_timeout; 339 dev->watchdog_timeo = HZ * 2; 340 dev->hard_header = cops_hard_header; 341 dev->get_stats = cops_get_stats; 342 dev->open = cops_open; 343 dev->stop = cops_close; 344 dev->do_ioctl = cops_ioctl; 345 dev->set_multicast_list = set_multicast_list; 346 dev->mc_list = NULL; 347 348 /* Tell the user where the card is and what mode we're in. */ 349 if(board==DAYNA) 350 printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n", 351 dev->name, cardname, ioaddr, dev->irq); 352 if(board==TANGENT) { 353 if(dev->irq) 354 printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n", 355 dev->name, cardname, ioaddr, dev->irq); 356 else 357 printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n", 358 dev->name, cardname, ioaddr); 359 360 } 361 return 0; 362 363err_out: 364 release_region(ioaddr, COPS_IO_EXTENT); 365 return retval; 366} 367 368static int __init cops_irq (int ioaddr, int board) 369{ /* 370 * This does not use the IRQ to determine where the IRQ is. We just 371 * assume that when we get a correct status response that it's the IRQ. 372 * This really just verifies the IO port but since we only have access 373 * to such a small number of IRQs (5, 4, 3) this is not bad. 374 * This will probably not work for more than one card. 375 */ 376 int irqaddr=0; 377 int i, x, status; 378 379 if(board==DAYNA) 380 { 381 outb(0, ioaddr+DAYNA_RESET); 382 inb(ioaddr+DAYNA_RESET); 383 mdelay(333); 384 } 385 if(board==TANGENT) 386 { 387 inb(ioaddr); 388 outb(0, ioaddr); 389 outb(0, ioaddr+TANG_RESET); 390 } 391 392 for(i=0; cops_irqlist[i] !=0; i++) 393 { 394 irqaddr = cops_irqlist[i]; 395 for(x = 0xFFFF; x>0; x --) /* wait for response */ 396 { 397 if(board==DAYNA) 398 { 399 status = (inb(ioaddr+DAYNA_CARD_STATUS)&3); 400 if(status == 1) 401 return irqaddr; 402 } 403 if(board==TANGENT) 404 { 405 if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0) 406 return irqaddr; 407 } 408 } 409 } 410 return 0; /* no IRQ found */ 411} 412 413/* 414 * Open/initialize the board. This is called (in the current kernel) 415 * sometime after booting when the 'ifconfig' program is run. 416 */ 417static int cops_open(struct net_device *dev) 418{ 419 struct cops_local *lp = netdev_priv(dev); 420 421 if(dev->irq==0) 422 { 423 /* 424 * I don't know if the Dayna-style boards support polled 425 * operation. For now, only allow it for Tangent. 426 */ 427 if(lp->board==TANGENT) /* Poll 20 times per second */ 428 { 429 init_timer(&cops_timer); 430 cops_timer.function = cops_poll; 431 cops_timer.data = (unsigned long)dev; 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 { 505 long snap=jiffies; 506 507 /* Let card finish initializing, about 1/3 second */ 508 while(jiffies-snap<HZ/3) 509 schedule(); 510 } 511 else 512 mdelay(333); 513 } 514 netif_wake_queue(dev); 515 return; 516} 517 518static void cops_load (struct net_device *dev) 519{ 520 struct ifreq ifr; 521 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru; 522 struct cops_local *lp = netdev_priv(dev); 523 int ioaddr=dev->base_addr; 524 int length, i = 0; 525 526 strcpy(ifr.ifr_name,"lt0"); 527 528 /* Get card's firmware code and do some checks on it. */ 529#ifdef CONFIG_COPS_DAYNA 530 if(lp->board==DAYNA) 531 { 532 ltf->length=sizeof(ffdrv_code); 533 ltf->data=ffdrv_code; 534 } 535 else 536#endif 537#ifdef CONFIG_COPS_TANGENT 538 if(lp->board==TANGENT) 539 { 540 ltf->length=sizeof(ltdrv_code); 541 ltf->data=ltdrv_code; 542 } 543 else 544#endif 545 { 546 printk(KERN_INFO "%s; unsupported board type.\n", dev->name); 547 return; 548 } 549 550 /* Check to make sure firmware is correct length. */ 551 if(lp->board==DAYNA && ltf->length!=5983) 552 { 553 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name); 554 return; 555 } 556 if(lp->board==TANGENT && ltf->length!=2501) 557 { 558 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name); 559 return; 560 } 561 562 if(lp->board==DAYNA) 563 { 564 /* 565 * We must wait for a status response 566 * with the DAYNA board. 567 */ 568 while(++i<65536) 569 { 570 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1) 571 break; 572 } 573 574 if(i==65536) 575 return; 576 } 577 578 /* 579 * Upload the firmware and kick. Byte-by-byte works nicely here. 580 */ 581 i=0; 582 length = ltf->length; 583 while(length--) 584 { 585 outb(ltf->data[i], ioaddr); 586 i++; 587 } 588 589 if(cops_debug > 1) 590 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n", 591 dev->name, i, ltf->length); 592 593 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */ 594 outb(1, ioaddr+DAYNA_INT_CARD); 595 else /* Tell Tang to run the firmware code. */ 596 inb(ioaddr); 597 598 if(lp->board==TANGENT) 599 { 600 tangent_wait_reset(ioaddr); 601 inb(ioaddr); /* Clear initial ready signal. */ 602 } 603 604 return; 605} 606 607/* 608 * Get the LocalTalk Nodeid from the card. We can suggest 609 * any nodeid 1-254. The card will try and get that exact 610 * address else we can specify 0 as the nodeid and the card 611 * will autoprobe for a nodeid. 612 */ 613static int cops_nodeid (struct net_device *dev, int nodeid) 614{ 615 struct cops_local *lp = netdev_priv(dev); 616 int ioaddr = dev->base_addr; 617 618 if(lp->board == DAYNA) 619 { 620 /* Empty any pending adapter responses. */ 621 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 622 { 623 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */ 624 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 625 cops_rx(dev); /* Kick any packets waiting. */ 626 schedule(); 627 } 628 629 outb(2, ioaddr); /* Output command packet length as 2. */ 630 outb(0, ioaddr); 631 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */ 632 outb(nodeid, ioaddr); /* Suggest node address. */ 633 } 634 635 if(lp->board == TANGENT) 636 { 637 /* Empty any pending adapter responses. */ 638 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 639 { 640 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */ 641 cops_rx(dev); /* Kick out packets waiting. */ 642 schedule(); 643 } 644 645 /* Not sure what Tangent does if nodeid picked is used. */ 646 if(nodeid == 0) /* Seed. */ 647 nodeid = jiffies&0xFF; /* Get a random try */ 648 outb(2, ioaddr); /* Command length LSB */ 649 outb(0, ioaddr); /* Command length MSB */ 650 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */ 651 outb(nodeid, ioaddr); /* LAP address hint. */ 652 outb(0xFF, ioaddr); /* Int. level to use */ 653 } 654 655 lp->node_acquire=0; /* Set nodeid holder to 0. */ 656 while(lp->node_acquire==0) /* Get *True* nodeid finally. */ 657 { 658 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */ 659 660 if(lp->board == DAYNA) 661 { 662 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 663 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 664 } 665 if(lp->board == TANGENT) 666 { 667 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 668 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 669 } 670 schedule(); 671 } 672 673 if(cops_debug > 1) 674 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n", 675 dev->name, lp->node_acquire); 676 677 lp->nodeid=1; /* Set got nodeid to 1. */ 678 679 return 0; 680} 681 682/* 683 * Poll the Tangent type cards to see if we have work. 684 */ 685 686static void cops_poll(unsigned long ltdev) 687{ 688 int ioaddr, status; 689 int boguscount = 0; 690 691 struct net_device *dev = (struct net_device *)ltdev; 692 693 del_timer(&cops_timer); 694 695 if(dev == NULL) 696 return; /* We've been downed */ 697 698 ioaddr = dev->base_addr; 699 do { 700 status=inb(ioaddr+TANG_CARD_STATUS); 701 if(status & TANG_RX_READY) 702 cops_rx(dev); 703 if(status & TANG_TX_READY) 704 netif_wake_queue(dev); 705 status = inb(ioaddr+TANG_CARD_STATUS); 706 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 707 708 /* poll 20 times per second */ 709 cops_timer.expires = jiffies + HZ/20; 710 add_timer(&cops_timer); 711 712 return; 713} 714 715/* 716 * The typical workload of the driver: 717 * Handle the network interface interrupts. 718 */ 719static irqreturn_t cops_interrupt(int irq, void *dev_id) 720{ 721 struct net_device *dev = dev_id; 722 struct cops_local *lp; 723 int ioaddr, status; 724 int boguscount = 0; 725 726 ioaddr = dev->base_addr; 727 lp = netdev_priv(dev); 728 729 if(lp->board==DAYNA) 730 { 731 do { 732 outb(0, ioaddr + COPS_CLEAR_INT); 733 status=inb(ioaddr+DAYNA_CARD_STATUS); 734 if((status&0x03)==DAYNA_RX_REQUEST) 735 cops_rx(dev); 736 netif_wake_queue(dev); 737 } while(++boguscount < 20); 738 } 739 else 740 { 741 do { 742 status=inb(ioaddr+TANG_CARD_STATUS); 743 if(status & TANG_RX_READY) 744 cops_rx(dev); 745 if(status & TANG_TX_READY) 746 netif_wake_queue(dev); 747 status=inb(ioaddr+TANG_CARD_STATUS); 748 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 749 } 750 751 return IRQ_HANDLED; 752} 753 754/* 755 * We have a good packet(s), get it/them out of the buffers. 756 */ 757static void cops_rx(struct net_device *dev) 758{ 759 int pkt_len = 0; 760 int rsp_type = 0; 761 struct sk_buff *skb = NULL; 762 struct cops_local *lp = netdev_priv(dev); 763 int ioaddr = dev->base_addr; 764 int boguscount = 0; 765 unsigned long flags; 766 767 768 spin_lock_irqsave(&lp->lock, flags); 769 770 if(lp->board==DAYNA) 771 { 772 outb(0, ioaddr); /* Send out Zero length. */ 773 outb(0, ioaddr); 774 outb(DATA_READ, ioaddr); /* Send read command out. */ 775 776 /* Wait for DMA to turn around. */ 777 while(++boguscount<1000000) 778 { 779 barrier(); 780 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY) 781 break; 782 } 783 784 if(boguscount==1000000) 785 { 786 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name); 787 spin_unlock_irqrestore(&lp->lock, flags); 788 return; 789 } 790 } 791 792 /* Get response length. */ 793 if(lp->board==DAYNA) 794 pkt_len = inb(ioaddr) & 0xFF; 795 else 796 pkt_len = inb(ioaddr) & 0x00FF; 797 pkt_len |= (inb(ioaddr) << 8); 798 /* Input IO code. */ 799 rsp_type=inb(ioaddr); 800 801 /* Malloc up new buffer. */ 802 skb = dev_alloc_skb(pkt_len); 803 if(skb == NULL) 804 { 805 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", 806 dev->name); 807 lp->stats.rx_dropped++; 808 while(pkt_len--) /* Discard packet */ 809 inb(ioaddr); 810 spin_unlock_irqrestore(&lp->lock, flags); 811 return; 812 } 813 skb->dev = dev; 814 skb_put(skb, pkt_len); 815 skb->protocol = htons(ETH_P_LOCALTALK); 816 817 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */ 818 819 if(lp->board==DAYNA) 820 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */ 821 822 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 823 824 /* Check for bad response length */ 825 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE) 826 { 827 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n", 828 dev->name, pkt_len); 829 lp->stats.tx_errors++; 830 dev_kfree_skb_any(skb); 831 return; 832 } 833 834 /* Set nodeid and then get out. */ 835 if(rsp_type == LAP_INIT_RSP) 836 { /* Nodeid taken from received packet. */ 837 lp->node_acquire = skb->data[0]; 838 dev_kfree_skb_any(skb); 839 return; 840 } 841 842 /* One last check to make sure we have a good packet. */ 843 if(rsp_type != LAP_RESPONSE) 844 { 845 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type); 846 lp->stats.tx_errors++; 847 dev_kfree_skb_any(skb); 848 return; 849 } 850 851 skb_reset_mac_header(skb); /* Point to entire packet. */ 852 skb_pull(skb,3); 853 skb_reset_transport_header(skb); /* Point to data (Skip header). */ 854 855 /* Update the counters. */ 856 lp->stats.rx_packets++; 857 lp->stats.rx_bytes += skb->len; 858 859 /* Send packet to a higher place. */ 860 netif_rx(skb); 861 dev->last_rx = jiffies; 862} 863 864static void cops_timeout(struct net_device *dev) 865{ 866 struct cops_local *lp = netdev_priv(dev); 867 int ioaddr = dev->base_addr; 868 869 lp->stats.tx_errors++; 870 if(lp->board==TANGENT) 871 { 872 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 873 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name); 874 } 875 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name); 876 cops_jumpstart(dev); /* Restart the card. */ 877 dev->trans_start = jiffies; 878 netif_wake_queue(dev); 879} 880 881 882/* 883 * Make the card transmit a LocalTalk packet. 884 */ 885 886static int cops_send_packet(struct sk_buff *skb, struct net_device *dev) 887{ 888 struct cops_local *lp = netdev_priv(dev); 889 int ioaddr = dev->base_addr; 890 unsigned long flags; 891 892 /* 893 * Block a timer-based transmit from overlapping. 894 */ 895 896 netif_stop_queue(dev); 897 898 spin_lock_irqsave(&lp->lock, flags); 899 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */ 900 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 901 cpu_relax(); 902 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */ 903 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 904 cpu_relax(); 905 906 /* Output IO length. */ 907 outb(skb->len, ioaddr); 908 if(lp->board == DAYNA) 909 outb(skb->len >> 8, ioaddr); 910 else 911 outb((skb->len >> 8)&0x0FF, ioaddr); 912 913 /* Output IO code. */ 914 outb(LAP_WRITE, ioaddr); 915 916 if(lp->board == DAYNA) /* Check the transmit buffer again. */ 917 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0); 918 919 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */ 920 921 if(lp->board==DAYNA) /* Dayna requires you kick the card */ 922 outb(1, ioaddr+DAYNA_INT_CARD); 923 924 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 925 926 /* Done sending packet, update counters and cleanup. */ 927 lp->stats.tx_packets++; 928 lp->stats.tx_bytes += skb->len; 929 dev->trans_start = jiffies; 930 dev_kfree_skb (skb); 931 return 0; 932} 933 934/* 935 * Dummy function to keep the Appletalk layer happy. 936 */ 937 938static void set_multicast_list(struct net_device *dev) 939{ 940 if(cops_debug >= 3) 941 printk("%s: set_multicast_list executed\n", dev->name); 942} 943 944/* 945 * Another Dummy function to keep the Appletalk layer happy. 946 */ 947 948static int cops_hard_header(struct sk_buff *skb, struct net_device *dev, 949 unsigned short type, void *daddr, void *saddr, 950 unsigned len) 951{ 952 if(cops_debug >= 3) 953 printk("%s: cops_hard_header executed. Wow!\n", dev->name); 954 return 0; 955} 956 957/* 958 * System ioctls for the COPS LocalTalk card. 959 */ 960 961static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 962{ 963 struct cops_local *lp = netdev_priv(dev); 964 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr; 965 struct atalk_addr *aa = (struct atalk_addr *)&lp->node_addr; 966 967 switch(cmd) 968 { 969 case SIOCSIFADDR: 970 /* Get and set the nodeid and network # atalkd wants. */ 971 cops_nodeid(dev, sa->sat_addr.s_node); 972 aa->s_net = sa->sat_addr.s_net; 973 aa->s_node = lp->node_acquire; 974 975 /* Set broardcast address. */ 976 dev->broadcast[0] = 0xFF; 977 978 /* Set hardware address. */ 979 dev->dev_addr[0] = aa->s_node; 980 dev->addr_len = 1; 981 return 0; 982 983 case SIOCGIFADDR: 984 sa->sat_addr.s_net = aa->s_net; 985 sa->sat_addr.s_node = aa->s_node; 986 return 0; 987 988 default: 989 return -EOPNOTSUPP; 990 } 991} 992 993/* 994 * The inverse routine to cops_open(). 995 */ 996 997static int cops_close(struct net_device *dev) 998{ 999 struct cops_local *lp = netdev_priv(dev); 1000 1001 /* If we were running polled, yank the timer. 1002 */ 1003 if(lp->board==TANGENT && dev->irq==0) 1004 del_timer(&cops_timer); 1005 1006 netif_stop_queue(dev); 1007 return 0; 1008} 1009 1010/* 1011 * Get the current statistics. 1012 * This may be called with the card open or closed. 1013 */ 1014static struct net_device_stats *cops_get_stats(struct net_device *dev) 1015{ 1016 struct cops_local *lp = netdev_priv(dev); 1017 return &lp->stats; 1018} 1019 1020#ifdef MODULE 1021static struct net_device *cops_dev; 1022 1023MODULE_LICENSE("GPL"); 1024module_param(io, int, 0); 1025module_param(irq, int, 0); 1026module_param(board_type, int, 0); 1027 1028int __init init_module(void) 1029{ 1030 if (io == 0) 1031 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", 1032 cardname); 1033 cops_dev = cops_probe(-1); 1034 if (IS_ERR(cops_dev)) 1035 return PTR_ERR(cops_dev); 1036 return 0; 1037} 1038 1039void __exit cleanup_module(void) 1040{ 1041 unregister_netdev(cops_dev); 1042 cleanup_card(cops_dev); 1043 free_netdev(cops_dev); 1044} 1045#endif /* MODULE */ 1046 1047/* 1048 * Local variables: 1049 * compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O2 -c cops.c" 1050 * c-basic-offset: 4 1051 * c-file-offsets: ((substatement-open . 0)) 1052 * End: 1053 */ 1054