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 36 static 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 86 static const char *cardname = "cops"; 87 88 #ifdef CONFIG_COPS_DAYNA 89 static int board_type = DAYNA; /* Module exported */ 90 #else 91 static int board_type = TANGENT; 92 #endif 93 94 static int io = 0x240; /* Default IO for Dayna */ 95 static 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 */ 143 144 static 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 */ 153 154 static int cops_irqlist[] = { 155 5, 4, 3, 0 156 }; 157 158 static 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 164 static 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. */ 170 171 struct 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. */ 181 static int cops_probe1 (struct net_device *dev, int ioaddr); 182 static int cops_irq (int ioaddr, int board); 183 184 static int cops_open (struct net_device *dev); 185 static int cops_jumpstart (struct net_device *dev); 186 static void cops_reset (struct net_device *dev, int sleep); 187 static void cops_load (struct net_device *dev); 188 static int cops_nodeid (struct net_device *dev, int nodeid); 189 190 static irqreturn_t cops_interrupt (int irq, void *dev_id); 191 static void cops_poll (unsigned long ltdev); 192 static void cops_timeout(struct net_device *dev); 193 static void cops_rx (struct net_device *dev); 194 static netdev_tx_t cops_send_packet (struct sk_buff *skb, 195 struct net_device *dev); 196 static void set_multicast_list (struct net_device *dev); 197 static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd); 198 static int cops_close (struct net_device *dev); 199 200 static 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 */ 213 struct 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 /* FIXME Does this really work for cards which generate irq? 239 * It's definitely N.G. for polled Tangent. sh 240 * Dayna cards don't autoprobe well at all, but if your card is 241 * at IRQ 5 & IO 0x240 we find it every time. ;) JS 242 */ 243 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++) 244 ; 245 if (!*port) 246 err = -ENODEV; 247 } 248 if (err) 249 goto out; 250 err = register_netdev(dev); 251 if (err) 252 goto out1; 253 return dev; 254 out1: 255 cleanup_card(dev); 256 out: 257 free_netdev(dev); 258 return ERR_PTR(err); 259 } 260 261 static const struct net_device_ops cops_netdev_ops = { 262 .ndo_open = cops_open, 263 .ndo_stop = cops_close, 264 .ndo_start_xmit = cops_send_packet, 265 .ndo_tx_timeout = cops_timeout, 266 .ndo_do_ioctl = cops_ioctl, 267 .ndo_set_multicast_list = set_multicast_list, 268 }; 269 270 /* 271 * This is the real probe routine. Linux has a history of friendly device 272 * probes on the ISA bus. A good device probes avoids doing writes, and 273 * verifies that the correct device exists and functions. 274 */ 275 static int __init cops_probe1(struct net_device *dev, int ioaddr) 276 { 277 struct cops_local *lp; 278 static unsigned version_printed; 279 int board = board_type; 280 int retval; 281 282 if(cops_debug && version_printed++ == 0) 283 printk("%s", version); 284 285 /* Grab the region so no one else tries to probe our ioports. */ 286 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name)) 287 return -EBUSY; 288 289 /* 290 * Since this board has jumpered interrupts, allocate the interrupt 291 * vector now. There is no point in waiting since no other device 292 * can use the interrupt, and this marks the irq as busy. Jumpered 293 * interrupts are typically not reported by the boards, and we must 294 * used AutoIRQ to find them. 295 */ 296 dev->irq = irq; 297 switch (dev->irq) 298 { 299 case 0: 300 /* COPS AutoIRQ routine */ 301 dev->irq = cops_irq(ioaddr, board); 302 if (dev->irq) 303 break; 304 /* No IRQ found on this port, fallthrough */ 305 case 1: 306 retval = -EINVAL; 307 goto err_out; 308 309 /* Fixup for users that don't know that IRQ 2 is really 310 * IRQ 9, or don't know which one to set. 311 */ 312 case 2: 313 dev->irq = 9; 314 break; 315 316 /* Polled operation requested. Although irq of zero passed as 317 * a parameter tells the init routines to probe, we'll 318 * overload it to denote polled operation at runtime. 319 */ 320 case 0xff: 321 dev->irq = 0; 322 break; 323 324 default: 325 break; 326 } 327 328 /* Reserve any actual interrupt. */ 329 if (dev->irq) { 330 retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev); 331 if (retval) 332 goto err_out; 333 } 334 335 dev->base_addr = ioaddr; 336 337 lp = netdev_priv(dev); 338 spin_lock_init(&lp->lock); 339 340 /* Copy local board variable to lp struct. */ 341 lp->board = board; 342 343 dev->netdev_ops = &cops_netdev_ops; 344 dev->watchdog_timeo = HZ * 2; 345 346 347 /* Tell the user where the card is and what mode we're in. */ 348 if(board==DAYNA) 349 printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n", 350 dev->name, cardname, ioaddr, dev->irq); 351 if(board==TANGENT) { 352 if(dev->irq) 353 printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n", 354 dev->name, cardname, ioaddr, dev->irq); 355 else 356 printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n", 357 dev->name, cardname, ioaddr); 358 359 } 360 return 0; 361 362 err_out: 363 release_region(ioaddr, COPS_IO_EXTENT); 364 return retval; 365 } 366 367 static int __init cops_irq (int ioaddr, int board) 368 { /* 369 * This does not use the IRQ to determine where the IRQ is. We just 370 * assume that when we get a correct status response that it's the IRQ. 371 * This really just verifies the IO port but since we only have access 372 * to such a small number of IRQs (5, 4, 3) this is not bad. 373 * This will probably not work for more than one card. 374 */ 375 int irqaddr=0; 376 int i, x, status; 377 378 if(board==DAYNA) 379 { 380 outb(0, ioaddr+DAYNA_RESET); 381 inb(ioaddr+DAYNA_RESET); 382 mdelay(333); 383 } 384 if(board==TANGENT) 385 { 386 inb(ioaddr); 387 outb(0, ioaddr); 388 outb(0, ioaddr+TANG_RESET); 389 } 390 391 for(i=0; cops_irqlist[i] !=0; i++) 392 { 393 irqaddr = cops_irqlist[i]; 394 for(x = 0xFFFF; x>0; x --) /* wait for response */ 395 { 396 if(board==DAYNA) 397 { 398 status = (inb(ioaddr+DAYNA_CARD_STATUS)&3); 399 if(status == 1) 400 return irqaddr; 401 } 402 if(board==TANGENT) 403 { 404 if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0) 405 return irqaddr; 406 } 407 } 408 } 409 return 0; /* no IRQ found */ 410 } 411 412 /* 413 * Open/initialize the board. This is called (in the current kernel) 414 * sometime after booting when the 'ifconfig' program is run. 415 */ 416 static int cops_open(struct net_device *dev) 417 { 418 struct cops_local *lp = netdev_priv(dev); 419 420 if(dev->irq==0) 421 { 422 /* 423 * I don't know if the Dayna-style boards support polled 424 * operation. For now, only allow it for Tangent. 425 */ 426 if(lp->board==TANGENT) /* Poll 20 times per second */ 427 { 428 init_timer(&cops_timer); 429 cops_timer.function = cops_poll; 430 cops_timer.data = (unsigned long)dev; 431 cops_timer.expires = jiffies + HZ/20; 432 add_timer(&cops_timer); 433 } 434 else 435 { 436 printk(KERN_WARNING "%s: No irq line set\n", dev->name); 437 return -EAGAIN; 438 } 439 } 440 441 cops_jumpstart(dev); /* Start the card up. */ 442 443 netif_start_queue(dev); 444 return 0; 445 } 446 447 /* 448 * This allows for a dynamic start/restart of the entire card. 449 */ 450 static int cops_jumpstart(struct net_device *dev) 451 { 452 struct cops_local *lp = netdev_priv(dev); 453 454 /* 455 * Once the card has the firmware loaded and has acquired 456 * the nodeid, if it is reset it will lose it all. 457 */ 458 cops_reset(dev,1); /* Need to reset card before load firmware. */ 459 cops_load(dev); /* Load the firmware. */ 460 461 /* 462 * If atalkd already gave us a nodeid we will use that 463 * one again, else we wait for atalkd to give us a nodeid 464 * in cops_ioctl. This may cause a problem if someone steals 465 * our nodeid while we are resetting. 466 */ 467 if(lp->nodeid == 1) 468 cops_nodeid(dev,lp->node_acquire); 469 470 return 0; 471 } 472 473 static void tangent_wait_reset(int ioaddr) 474 { 475 int timeout=0; 476 477 while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 478 mdelay(1); /* Wait 1 second */ 479 } 480 481 /* 482 * Reset the LocalTalk board. 483 */ 484 static void cops_reset(struct net_device *dev, int sleep) 485 { 486 struct cops_local *lp = netdev_priv(dev); 487 int ioaddr=dev->base_addr; 488 489 if(lp->board==TANGENT) 490 { 491 inb(ioaddr); /* Clear request latch. */ 492 outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */ 493 outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */ 494 495 tangent_wait_reset(ioaddr); 496 outb(0, ioaddr+TANG_CLEAR_INT); 497 } 498 if(lp->board==DAYNA) 499 { 500 outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */ 501 inb(ioaddr+DAYNA_RESET); /* Clear the reset */ 502 if (sleep) 503 msleep(333); 504 else 505 mdelay(333); 506 } 507 508 netif_wake_queue(dev); 509 } 510 511 static void cops_load (struct net_device *dev) 512 { 513 struct ifreq ifr; 514 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru; 515 struct cops_local *lp = netdev_priv(dev); 516 int ioaddr=dev->base_addr; 517 int length, i = 0; 518 519 strcpy(ifr.ifr_name,"lt0"); 520 521 /* Get card's firmware code and do some checks on it. */ 522 #ifdef CONFIG_COPS_DAYNA 523 if(lp->board==DAYNA) 524 { 525 ltf->length=sizeof(ffdrv_code); 526 ltf->data=ffdrv_code; 527 } 528 else 529 #endif 530 #ifdef CONFIG_COPS_TANGENT 531 if(lp->board==TANGENT) 532 { 533 ltf->length=sizeof(ltdrv_code); 534 ltf->data=ltdrv_code; 535 } 536 else 537 #endif 538 { 539 printk(KERN_INFO "%s; unsupported board type.\n", dev->name); 540 return; 541 } 542 543 /* Check to make sure firmware is correct length. */ 544 if(lp->board==DAYNA && ltf->length!=5983) 545 { 546 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name); 547 return; 548 } 549 if(lp->board==TANGENT && ltf->length!=2501) 550 { 551 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name); 552 return; 553 } 554 555 if(lp->board==DAYNA) 556 { 557 /* 558 * We must wait for a status response 559 * with the DAYNA board. 560 */ 561 while(++i<65536) 562 { 563 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1) 564 break; 565 } 566 567 if(i==65536) 568 return; 569 } 570 571 /* 572 * Upload the firmware and kick. Byte-by-byte works nicely here. 573 */ 574 i=0; 575 length = ltf->length; 576 while(length--) 577 { 578 outb(ltf->data[i], ioaddr); 579 i++; 580 } 581 582 if(cops_debug > 1) 583 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n", 584 dev->name, i, ltf->length); 585 586 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */ 587 outb(1, ioaddr+DAYNA_INT_CARD); 588 else /* Tell Tang to run the firmware code. */ 589 inb(ioaddr); 590 591 if(lp->board==TANGENT) 592 { 593 tangent_wait_reset(ioaddr); 594 inb(ioaddr); /* Clear initial ready signal. */ 595 } 596 597 return; 598 } 599 600 /* 601 * Get the LocalTalk Nodeid from the card. We can suggest 602 * any nodeid 1-254. The card will try and get that exact 603 * address else we can specify 0 as the nodeid and the card 604 * will autoprobe for a nodeid. 605 */ 606 static int cops_nodeid (struct net_device *dev, int nodeid) 607 { 608 struct cops_local *lp = netdev_priv(dev); 609 int ioaddr = dev->base_addr; 610 611 if(lp->board == DAYNA) 612 { 613 /* Empty any pending adapter responses. */ 614 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 615 { 616 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */ 617 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 618 cops_rx(dev); /* Kick any packets waiting. */ 619 schedule(); 620 } 621 622 outb(2, ioaddr); /* Output command packet length as 2. */ 623 outb(0, ioaddr); 624 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */ 625 outb(nodeid, ioaddr); /* Suggest node address. */ 626 } 627 628 if(lp->board == TANGENT) 629 { 630 /* Empty any pending adapter responses. */ 631 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 632 { 633 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */ 634 cops_rx(dev); /* Kick out packets waiting. */ 635 schedule(); 636 } 637 638 /* Not sure what Tangent does if nodeid picked is used. */ 639 if(nodeid == 0) /* Seed. */ 640 nodeid = jiffies&0xFF; /* Get a random try */ 641 outb(2, ioaddr); /* Command length LSB */ 642 outb(0, ioaddr); /* Command length MSB */ 643 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */ 644 outb(nodeid, ioaddr); /* LAP address hint. */ 645 outb(0xFF, ioaddr); /* Int. level to use */ 646 } 647 648 lp->node_acquire=0; /* Set nodeid holder to 0. */ 649 while(lp->node_acquire==0) /* Get *True* nodeid finally. */ 650 { 651 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */ 652 653 if(lp->board == DAYNA) 654 { 655 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 656 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 657 } 658 if(lp->board == TANGENT) 659 { 660 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 661 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 662 } 663 schedule(); 664 } 665 666 if(cops_debug > 1) 667 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n", 668 dev->name, lp->node_acquire); 669 670 lp->nodeid=1; /* Set got nodeid to 1. */ 671 672 return 0; 673 } 674 675 /* 676 * Poll the Tangent type cards to see if we have work. 677 */ 678 679 static void cops_poll(unsigned long ltdev) 680 { 681 int ioaddr, status; 682 int boguscount = 0; 683 684 struct net_device *dev = (struct net_device *)ltdev; 685 686 del_timer(&cops_timer); 687 688 if(dev == NULL) 689 return; /* We've been downed */ 690 691 ioaddr = dev->base_addr; 692 do { 693 status=inb(ioaddr+TANG_CARD_STATUS); 694 if(status & TANG_RX_READY) 695 cops_rx(dev); 696 if(status & TANG_TX_READY) 697 netif_wake_queue(dev); 698 status = inb(ioaddr+TANG_CARD_STATUS); 699 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 700 701 /* poll 20 times per second */ 702 cops_timer.expires = jiffies + HZ/20; 703 add_timer(&cops_timer); 704 705 return; 706 } 707 708 /* 709 * The typical workload of the driver: 710 * Handle the network interface interrupts. 711 */ 712 static irqreturn_t cops_interrupt(int irq, void *dev_id) 713 { 714 struct net_device *dev = dev_id; 715 struct cops_local *lp; 716 int ioaddr, status; 717 int boguscount = 0; 718 719 ioaddr = dev->base_addr; 720 lp = netdev_priv(dev); 721 722 if(lp->board==DAYNA) 723 { 724 do { 725 outb(0, ioaddr + COPS_CLEAR_INT); 726 status=inb(ioaddr+DAYNA_CARD_STATUS); 727 if((status&0x03)==DAYNA_RX_REQUEST) 728 cops_rx(dev); 729 netif_wake_queue(dev); 730 } while(++boguscount < 20); 731 } 732 else 733 { 734 do { 735 status=inb(ioaddr+TANG_CARD_STATUS); 736 if(status & TANG_RX_READY) 737 cops_rx(dev); 738 if(status & TANG_TX_READY) 739 netif_wake_queue(dev); 740 status=inb(ioaddr+TANG_CARD_STATUS); 741 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 742 } 743 744 return IRQ_HANDLED; 745 } 746 747 /* 748 * We have a good packet(s), get it/them out of the buffers. 749 */ 750 static void cops_rx(struct net_device *dev) 751 { 752 int pkt_len = 0; 753 int rsp_type = 0; 754 struct sk_buff *skb = NULL; 755 struct cops_local *lp = netdev_priv(dev); 756 int ioaddr = dev->base_addr; 757 int boguscount = 0; 758 unsigned long flags; 759 760 761 spin_lock_irqsave(&lp->lock, flags); 762 763 if(lp->board==DAYNA) 764 { 765 outb(0, ioaddr); /* Send out Zero length. */ 766 outb(0, ioaddr); 767 outb(DATA_READ, ioaddr); /* Send read command out. */ 768 769 /* Wait for DMA to turn around. */ 770 while(++boguscount<1000000) 771 { 772 barrier(); 773 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY) 774 break; 775 } 776 777 if(boguscount==1000000) 778 { 779 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name); 780 spin_unlock_irqrestore(&lp->lock, flags); 781 return; 782 } 783 } 784 785 /* Get response length. */ 786 if(lp->board==DAYNA) 787 pkt_len = inb(ioaddr) & 0xFF; 788 else 789 pkt_len = inb(ioaddr) & 0x00FF; 790 pkt_len |= (inb(ioaddr) << 8); 791 /* Input IO code. */ 792 rsp_type=inb(ioaddr); 793 794 /* Malloc up new buffer. */ 795 skb = dev_alloc_skb(pkt_len); 796 if(skb == NULL) 797 { 798 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", 799 dev->name); 800 dev->stats.rx_dropped++; 801 while(pkt_len--) /* Discard packet */ 802 inb(ioaddr); 803 spin_unlock_irqrestore(&lp->lock, flags); 804 return; 805 } 806 skb->dev = dev; 807 skb_put(skb, pkt_len); 808 skb->protocol = htons(ETH_P_LOCALTALK); 809 810 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */ 811 812 if(lp->board==DAYNA) 813 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */ 814 815 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 816 817 /* Check for bad response length */ 818 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE) 819 { 820 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n", 821 dev->name, pkt_len); 822 dev->stats.tx_errors++; 823 dev_kfree_skb_any(skb); 824 return; 825 } 826 827 /* Set nodeid and then get out. */ 828 if(rsp_type == LAP_INIT_RSP) 829 { /* Nodeid taken from received packet. */ 830 lp->node_acquire = skb->data[0]; 831 dev_kfree_skb_any(skb); 832 return; 833 } 834 835 /* One last check to make sure we have a good packet. */ 836 if(rsp_type != LAP_RESPONSE) 837 { 838 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type); 839 dev->stats.tx_errors++; 840 dev_kfree_skb_any(skb); 841 return; 842 } 843 844 skb_reset_mac_header(skb); /* Point to entire packet. */ 845 skb_pull(skb,3); 846 skb_reset_transport_header(skb); /* Point to data (Skip header). */ 847 848 /* Update the counters. */ 849 dev->stats.rx_packets++; 850 dev->stats.rx_bytes += skb->len; 851 852 /* Send packet to a higher place. */ 853 netif_rx(skb); 854 } 855 856 static void cops_timeout(struct net_device *dev) 857 { 858 struct cops_local *lp = netdev_priv(dev); 859 int ioaddr = dev->base_addr; 860 861 dev->stats.tx_errors++; 862 if(lp->board==TANGENT) 863 { 864 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 865 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name); 866 } 867 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name); 868 cops_jumpstart(dev); /* Restart the card. */ 869 dev->trans_start = jiffies; 870 netif_wake_queue(dev); 871 } 872 873 874 /* 875 * Make the card transmit a LocalTalk packet. 876 */ 877 878 static netdev_tx_t cops_send_packet(struct sk_buff *skb, 879 struct net_device *dev) 880 { 881 struct cops_local *lp = netdev_priv(dev); 882 int ioaddr = dev->base_addr; 883 unsigned long flags; 884 885 /* 886 * Block a timer-based transmit from overlapping. 887 */ 888 889 netif_stop_queue(dev); 890 891 spin_lock_irqsave(&lp->lock, flags); 892 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */ 893 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 894 cpu_relax(); 895 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */ 896 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 897 cpu_relax(); 898 899 /* Output IO length. */ 900 outb(skb->len, ioaddr); 901 if(lp->board == DAYNA) 902 outb(skb->len >> 8, ioaddr); 903 else 904 outb((skb->len >> 8)&0x0FF, ioaddr); 905 906 /* Output IO code. */ 907 outb(LAP_WRITE, ioaddr); 908 909 if(lp->board == DAYNA) /* Check the transmit buffer again. */ 910 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0); 911 912 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */ 913 914 if(lp->board==DAYNA) /* Dayna requires you kick the card */ 915 outb(1, ioaddr+DAYNA_INT_CARD); 916 917 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 918 919 /* Done sending packet, update counters and cleanup. */ 920 dev->stats.tx_packets++; 921 dev->stats.tx_bytes += skb->len; 922 dev->trans_start = jiffies; 923 dev_kfree_skb (skb); 924 return NETDEV_TX_OK; 925 } 926 927 /* 928 * Dummy function to keep the Appletalk layer happy. 929 */ 930 931 static void set_multicast_list(struct net_device *dev) 932 { 933 if(cops_debug >= 3) 934 printk("%s: set_multicast_list executed\n", dev->name); 935 } 936 937 /* 938 * System ioctls for the COPS LocalTalk card. 939 */ 940 941 static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 942 { 943 struct cops_local *lp = netdev_priv(dev); 944 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr; 945 struct atalk_addr *aa = (struct atalk_addr *)&lp->node_addr; 946 947 switch(cmd) 948 { 949 case SIOCSIFADDR: 950 /* Get and set the nodeid and network # atalkd wants. */ 951 cops_nodeid(dev, sa->sat_addr.s_node); 952 aa->s_net = sa->sat_addr.s_net; 953 aa->s_node = lp->node_acquire; 954 955 /* Set broardcast address. */ 956 dev->broadcast[0] = 0xFF; 957 958 /* Set hardware address. */ 959 dev->dev_addr[0] = aa->s_node; 960 dev->addr_len = 1; 961 return 0; 962 963 case SIOCGIFADDR: 964 sa->sat_addr.s_net = aa->s_net; 965 sa->sat_addr.s_node = aa->s_node; 966 return 0; 967 968 default: 969 return -EOPNOTSUPP; 970 } 971 } 972 973 /* 974 * The inverse routine to cops_open(). 975 */ 976 977 static int cops_close(struct net_device *dev) 978 { 979 struct cops_local *lp = netdev_priv(dev); 980 981 /* If we were running polled, yank the timer. 982 */ 983 if(lp->board==TANGENT && dev->irq==0) 984 del_timer(&cops_timer); 985 986 netif_stop_queue(dev); 987 return 0; 988 } 989 990 991 #ifdef MODULE 992 static struct net_device *cops_dev; 993 994 MODULE_LICENSE("GPL"); 995 module_param(io, int, 0); 996 module_param(irq, int, 0); 997 module_param(board_type, int, 0); 998 999 static int __init cops_module_init(void) 1000 { 1001 if (io == 0) 1002 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", 1003 cardname); 1004 cops_dev = cops_probe(-1); 1005 if (IS_ERR(cops_dev)) 1006 return PTR_ERR(cops_dev); 1007 return 0; 1008 } 1009 1010 static void __exit cops_module_exit(void) 1011 { 1012 unregister_netdev(cops_dev); 1013 cleanup_card(cops_dev); 1014 free_netdev(cops_dev); 1015 } 1016 module_init(cops_module_init); 1017 module_exit(cops_module_exit); 1018 #endif /* MODULE */ 1019