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