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 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/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 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 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 */ 143 144 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 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. */ 182 static int cops_probe1 (struct net_device *dev, int ioaddr); 183 static int cops_irq (int ioaddr, int board); 184 185 static int cops_open (struct net_device *dev); 186 static int cops_jumpstart (struct net_device *dev); 187 static void cops_reset (struct net_device *dev, int sleep); 188 static void cops_load (struct net_device *dev); 189 static int cops_nodeid (struct net_device *dev, int nodeid); 190 191 static irqreturn_t cops_interrupt (int irq, void *dev_id); 192 static void cops_poll (unsigned long ltdev); 193 static void cops_timeout(struct net_device *dev); 194 static void cops_rx (struct net_device *dev); 195 static int cops_send_packet (struct sk_buff *skb, struct net_device *dev); 196 static void set_multicast_list (struct net_device *dev); 197 static int cops_hard_header (struct sk_buff *skb, struct net_device *dev, 198 unsigned short type, void *daddr, void *saddr, 199 unsigned len); 200 201 static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd); 202 static int cops_close (struct net_device *dev); 203 static struct net_device_stats *cops_get_stats (struct net_device *dev); 204 205 static 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 */ 218 struct 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 /* FIXME Does this really work for cards which generate irq? 246 * It's definitely N.G. for polled Tangent. sh 247 * Dayna cards don't autoprobe well at all, but if your card is 248 * at IRQ 5 & IO 0x240 we find it every time. ;) JS 249 */ 250 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++) 251 ; 252 if (!*port) 253 err = -ENODEV; 254 } 255 if (err) 256 goto out; 257 err = register_netdev(dev); 258 if (err) 259 goto out1; 260 return dev; 261 out1: 262 cleanup_card(dev); 263 out: 264 free_netdev(dev); 265 return ERR_PTR(err); 266 } 267 268 /* 269 * This is the real probe routine. Linux has a history of friendly device 270 * probes on the ISA bus. A good device probes avoids doing writes, and 271 * verifies that the correct device exists and functions. 272 */ 273 static int __init cops_probe1(struct net_device *dev, int ioaddr) 274 { 275 struct cops_local *lp; 276 static unsigned version_printed; 277 int board = board_type; 278 int retval; 279 280 if(cops_debug && version_printed++ == 0) 281 printk("%s", version); 282 283 /* Grab the region so no one else tries to probe our ioports. */ 284 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name)) 285 return -EBUSY; 286 287 /* 288 * Since this board has jumpered interrupts, allocate the interrupt 289 * vector now. There is no point in waiting since no other device 290 * can use the interrupt, and this marks the irq as busy. Jumpered 291 * interrupts are typically not reported by the boards, and we must 292 * used AutoIRQ to find them. 293 */ 294 dev->irq = irq; 295 switch (dev->irq) 296 { 297 case 0: 298 /* COPS AutoIRQ routine */ 299 dev->irq = cops_irq(ioaddr, board); 300 if (dev->irq) 301 break; 302 /* No IRQ found on this port, fallthrough */ 303 case 1: 304 retval = -EINVAL; 305 goto err_out; 306 307 /* Fixup for users that don't know that IRQ 2 is really 308 * IRQ 9, or don't know which one to set. 309 */ 310 case 2: 311 dev->irq = 9; 312 break; 313 314 /* Polled operation requested. Although irq of zero passed as 315 * a parameter tells the init routines to probe, we'll 316 * overload it to denote polled operation at runtime. 317 */ 318 case 0xff: 319 dev->irq = 0; 320 break; 321 322 default: 323 break; 324 } 325 326 /* Reserve any actual interrupt. */ 327 if (dev->irq) { 328 retval = request_irq(dev->irq, &cops_interrupt, 0, dev->name, dev); 329 if (retval) 330 goto err_out; 331 } 332 333 dev->base_addr = ioaddr; 334 335 lp = netdev_priv(dev); 336 memset(lp, 0, sizeof(struct cops_local)); 337 spin_lock_init(&lp->lock); 338 339 /* Copy local board variable to lp struct. */ 340 lp->board = board; 341 342 dev->hard_start_xmit = cops_send_packet; 343 dev->tx_timeout = cops_timeout; 344 dev->watchdog_timeo = HZ * 2; 345 dev->hard_header = cops_hard_header; 346 dev->get_stats = cops_get_stats; 347 dev->open = cops_open; 348 dev->stop = cops_close; 349 dev->do_ioctl = cops_ioctl; 350 dev->set_multicast_list = set_multicast_list; 351 dev->mc_list = NULL; 352 353 /* Tell the user where the card is and what mode we're in. */ 354 if(board==DAYNA) 355 printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n", 356 dev->name, cardname, ioaddr, dev->irq); 357 if(board==TANGENT) { 358 if(dev->irq) 359 printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n", 360 dev->name, cardname, ioaddr, dev->irq); 361 else 362 printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n", 363 dev->name, cardname, ioaddr); 364 365 } 366 return 0; 367 368 err_out: 369 release_region(ioaddr, COPS_IO_EXTENT); 370 return retval; 371 } 372 373 static int __init cops_irq (int ioaddr, int board) 374 { /* 375 * This does not use the IRQ to determine where the IRQ is. We just 376 * assume that when we get a correct status response that it's the IRQ. 377 * This really just verifies the IO port but since we only have access 378 * to such a small number of IRQs (5, 4, 3) this is not bad. 379 * This will probably not work for more than one card. 380 */ 381 int irqaddr=0; 382 int i, x, status; 383 384 if(board==DAYNA) 385 { 386 outb(0, ioaddr+DAYNA_RESET); 387 inb(ioaddr+DAYNA_RESET); 388 mdelay(333); 389 } 390 if(board==TANGENT) 391 { 392 inb(ioaddr); 393 outb(0, ioaddr); 394 outb(0, ioaddr+TANG_RESET); 395 } 396 397 for(i=0; cops_irqlist[i] !=0; i++) 398 { 399 irqaddr = cops_irqlist[i]; 400 for(x = 0xFFFF; x>0; x --) /* wait for response */ 401 { 402 if(board==DAYNA) 403 { 404 status = (inb(ioaddr+DAYNA_CARD_STATUS)&3); 405 if(status == 1) 406 return irqaddr; 407 } 408 if(board==TANGENT) 409 { 410 if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0) 411 return irqaddr; 412 } 413 } 414 } 415 return 0; /* no IRQ found */ 416 } 417 418 /* 419 * Open/initialize the board. This is called (in the current kernel) 420 * sometime after booting when the 'ifconfig' program is run. 421 */ 422 static int cops_open(struct net_device *dev) 423 { 424 struct cops_local *lp = netdev_priv(dev); 425 426 if(dev->irq==0) 427 { 428 /* 429 * I don't know if the Dayna-style boards support polled 430 * operation. For now, only allow it for Tangent. 431 */ 432 if(lp->board==TANGENT) /* Poll 20 times per second */ 433 { 434 init_timer(&cops_timer); 435 cops_timer.function = cops_poll; 436 cops_timer.data = (unsigned long)dev; 437 cops_timer.expires = jiffies + HZ/20; 438 add_timer(&cops_timer); 439 } 440 else 441 { 442 printk(KERN_WARNING "%s: No irq line set\n", dev->name); 443 return -EAGAIN; 444 } 445 } 446 447 cops_jumpstart(dev); /* Start the card up. */ 448 449 netif_start_queue(dev); 450 return 0; 451 } 452 453 /* 454 * This allows for a dynamic start/restart of the entire card. 455 */ 456 static int cops_jumpstart(struct net_device *dev) 457 { 458 struct cops_local *lp = netdev_priv(dev); 459 460 /* 461 * Once the card has the firmware loaded and has acquired 462 * the nodeid, if it is reset it will lose it all. 463 */ 464 cops_reset(dev,1); /* Need to reset card before load firmware. */ 465 cops_load(dev); /* Load the firmware. */ 466 467 /* 468 * If atalkd already gave us a nodeid we will use that 469 * one again, else we wait for atalkd to give us a nodeid 470 * in cops_ioctl. This may cause a problem if someone steals 471 * our nodeid while we are resetting. 472 */ 473 if(lp->nodeid == 1) 474 cops_nodeid(dev,lp->node_acquire); 475 476 return 0; 477 } 478 479 static void tangent_wait_reset(int ioaddr) 480 { 481 int timeout=0; 482 483 while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 484 mdelay(1); /* Wait 1 second */ 485 } 486 487 /* 488 * Reset the LocalTalk board. 489 */ 490 static void cops_reset(struct net_device *dev, int sleep) 491 { 492 struct cops_local *lp = netdev_priv(dev); 493 int ioaddr=dev->base_addr; 494 495 if(lp->board==TANGENT) 496 { 497 inb(ioaddr); /* Clear request latch. */ 498 outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */ 499 outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */ 500 501 tangent_wait_reset(ioaddr); 502 outb(0, ioaddr+TANG_CLEAR_INT); 503 } 504 if(lp->board==DAYNA) 505 { 506 outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */ 507 inb(ioaddr+DAYNA_RESET); /* Clear the reset */ 508 if(sleep) 509 { 510 long snap=jiffies; 511 512 /* Let card finish initializing, about 1/3 second */ 513 while(jiffies-snap<HZ/3) 514 schedule(); 515 } 516 else 517 mdelay(333); 518 } 519 netif_wake_queue(dev); 520 return; 521 } 522 523 static void cops_load (struct net_device *dev) 524 { 525 struct ifreq ifr; 526 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru; 527 struct cops_local *lp = netdev_priv(dev); 528 int ioaddr=dev->base_addr; 529 int length, i = 0; 530 531 strcpy(ifr.ifr_name,"lt0"); 532 533 /* Get card's firmware code and do some checks on it. */ 534 #ifdef CONFIG_COPS_DAYNA 535 if(lp->board==DAYNA) 536 { 537 ltf->length=sizeof(ffdrv_code); 538 ltf->data=ffdrv_code; 539 } 540 else 541 #endif 542 #ifdef CONFIG_COPS_TANGENT 543 if(lp->board==TANGENT) 544 { 545 ltf->length=sizeof(ltdrv_code); 546 ltf->data=ltdrv_code; 547 } 548 else 549 #endif 550 { 551 printk(KERN_INFO "%s; unsupported board type.\n", dev->name); 552 return; 553 } 554 555 /* Check to make sure firmware is correct length. */ 556 if(lp->board==DAYNA && ltf->length!=5983) 557 { 558 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name); 559 return; 560 } 561 if(lp->board==TANGENT && ltf->length!=2501) 562 { 563 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name); 564 return; 565 } 566 567 if(lp->board==DAYNA) 568 { 569 /* 570 * We must wait for a status response 571 * with the DAYNA board. 572 */ 573 while(++i<65536) 574 { 575 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1) 576 break; 577 } 578 579 if(i==65536) 580 return; 581 } 582 583 /* 584 * Upload the firmware and kick. Byte-by-byte works nicely here. 585 */ 586 i=0; 587 length = ltf->length; 588 while(length--) 589 { 590 outb(ltf->data[i], ioaddr); 591 i++; 592 } 593 594 if(cops_debug > 1) 595 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n", 596 dev->name, i, ltf->length); 597 598 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */ 599 outb(1, ioaddr+DAYNA_INT_CARD); 600 else /* Tell Tang to run the firmware code. */ 601 inb(ioaddr); 602 603 if(lp->board==TANGENT) 604 { 605 tangent_wait_reset(ioaddr); 606 inb(ioaddr); /* Clear initial ready signal. */ 607 } 608 609 return; 610 } 611 612 /* 613 * Get the LocalTalk Nodeid from the card. We can suggest 614 * any nodeid 1-254. The card will try and get that exact 615 * address else we can specify 0 as the nodeid and the card 616 * will autoprobe for a nodeid. 617 */ 618 static int cops_nodeid (struct net_device *dev, int nodeid) 619 { 620 struct cops_local *lp = netdev_priv(dev); 621 int ioaddr = dev->base_addr; 622 623 if(lp->board == DAYNA) 624 { 625 /* Empty any pending adapter responses. */ 626 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 627 { 628 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */ 629 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 630 cops_rx(dev); /* Kick any packets waiting. */ 631 schedule(); 632 } 633 634 outb(2, ioaddr); /* Output command packet length as 2. */ 635 outb(0, ioaddr); 636 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */ 637 outb(nodeid, ioaddr); /* Suggest node address. */ 638 } 639 640 if(lp->board == TANGENT) 641 { 642 /* Empty any pending adapter responses. */ 643 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 644 { 645 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */ 646 cops_rx(dev); /* Kick out packets waiting. */ 647 schedule(); 648 } 649 650 /* Not sure what Tangent does if nodeid picked is used. */ 651 if(nodeid == 0) /* Seed. */ 652 nodeid = jiffies&0xFF; /* Get a random try */ 653 outb(2, ioaddr); /* Command length LSB */ 654 outb(0, ioaddr); /* Command length MSB */ 655 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */ 656 outb(nodeid, ioaddr); /* LAP address hint. */ 657 outb(0xFF, ioaddr); /* Int. level to use */ 658 } 659 660 lp->node_acquire=0; /* Set nodeid holder to 0. */ 661 while(lp->node_acquire==0) /* Get *True* nodeid finally. */ 662 { 663 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */ 664 665 if(lp->board == DAYNA) 666 { 667 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 668 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 669 } 670 if(lp->board == TANGENT) 671 { 672 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 673 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 674 } 675 schedule(); 676 } 677 678 if(cops_debug > 1) 679 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n", 680 dev->name, lp->node_acquire); 681 682 lp->nodeid=1; /* Set got nodeid to 1. */ 683 684 return 0; 685 } 686 687 /* 688 * Poll the Tangent type cards to see if we have work. 689 */ 690 691 static void cops_poll(unsigned long ltdev) 692 { 693 int ioaddr, status; 694 int boguscount = 0; 695 696 struct net_device *dev = (struct net_device *)ltdev; 697 698 del_timer(&cops_timer); 699 700 if(dev == NULL) 701 return; /* We've been downed */ 702 703 ioaddr = dev->base_addr; 704 do { 705 status=inb(ioaddr+TANG_CARD_STATUS); 706 if(status & TANG_RX_READY) 707 cops_rx(dev); 708 if(status & TANG_TX_READY) 709 netif_wake_queue(dev); 710 status = inb(ioaddr+TANG_CARD_STATUS); 711 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 712 713 /* poll 20 times per second */ 714 cops_timer.expires = jiffies + HZ/20; 715 add_timer(&cops_timer); 716 717 return; 718 } 719 720 /* 721 * The typical workload of the driver: 722 * Handle the network interface interrupts. 723 */ 724 static irqreturn_t cops_interrupt(int irq, void *dev_id) 725 { 726 struct net_device *dev = dev_id; 727 struct cops_local *lp; 728 int ioaddr, status; 729 int boguscount = 0; 730 731 ioaddr = dev->base_addr; 732 lp = netdev_priv(dev); 733 734 if(lp->board==DAYNA) 735 { 736 do { 737 outb(0, ioaddr + COPS_CLEAR_INT); 738 status=inb(ioaddr+DAYNA_CARD_STATUS); 739 if((status&0x03)==DAYNA_RX_REQUEST) 740 cops_rx(dev); 741 netif_wake_queue(dev); 742 } while(++boguscount < 20); 743 } 744 else 745 { 746 do { 747 status=inb(ioaddr+TANG_CARD_STATUS); 748 if(status & TANG_RX_READY) 749 cops_rx(dev); 750 if(status & TANG_TX_READY) 751 netif_wake_queue(dev); 752 status=inb(ioaddr+TANG_CARD_STATUS); 753 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 754 } 755 756 return IRQ_HANDLED; 757 } 758 759 /* 760 * We have a good packet(s), get it/them out of the buffers. 761 */ 762 static void cops_rx(struct net_device *dev) 763 { 764 int pkt_len = 0; 765 int rsp_type = 0; 766 struct sk_buff *skb = NULL; 767 struct cops_local *lp = netdev_priv(dev); 768 int ioaddr = dev->base_addr; 769 int boguscount = 0; 770 unsigned long flags; 771 772 773 spin_lock_irqsave(&lp->lock, flags); 774 775 if(lp->board==DAYNA) 776 { 777 outb(0, ioaddr); /* Send out Zero length. */ 778 outb(0, ioaddr); 779 outb(DATA_READ, ioaddr); /* Send read command out. */ 780 781 /* Wait for DMA to turn around. */ 782 while(++boguscount<1000000) 783 { 784 barrier(); 785 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY) 786 break; 787 } 788 789 if(boguscount==1000000) 790 { 791 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name); 792 spin_unlock_irqrestore(&lp->lock, flags); 793 return; 794 } 795 } 796 797 /* Get response length. */ 798 if(lp->board==DAYNA) 799 pkt_len = inb(ioaddr) & 0xFF; 800 else 801 pkt_len = inb(ioaddr) & 0x00FF; 802 pkt_len |= (inb(ioaddr) << 8); 803 /* Input IO code. */ 804 rsp_type=inb(ioaddr); 805 806 /* Malloc up new buffer. */ 807 skb = dev_alloc_skb(pkt_len); 808 if(skb == NULL) 809 { 810 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", 811 dev->name); 812 lp->stats.rx_dropped++; 813 while(pkt_len--) /* Discard packet */ 814 inb(ioaddr); 815 spin_unlock_irqrestore(&lp->lock, flags); 816 return; 817 } 818 skb->dev = dev; 819 skb_put(skb, pkt_len); 820 skb->protocol = htons(ETH_P_LOCALTALK); 821 822 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */ 823 824 if(lp->board==DAYNA) 825 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */ 826 827 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 828 829 /* Check for bad response length */ 830 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE) 831 { 832 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n", 833 dev->name, pkt_len); 834 lp->stats.tx_errors++; 835 dev_kfree_skb_any(skb); 836 return; 837 } 838 839 /* Set nodeid and then get out. */ 840 if(rsp_type == LAP_INIT_RSP) 841 { /* Nodeid taken from received packet. */ 842 lp->node_acquire = skb->data[0]; 843 dev_kfree_skb_any(skb); 844 return; 845 } 846 847 /* One last check to make sure we have a good packet. */ 848 if(rsp_type != LAP_RESPONSE) 849 { 850 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type); 851 lp->stats.tx_errors++; 852 dev_kfree_skb_any(skb); 853 return; 854 } 855 856 skb_reset_mac_header(skb); /* Point to entire packet. */ 857 skb_pull(skb,3); 858 skb_reset_transport_header(skb); /* Point to data (Skip header). */ 859 860 /* Update the counters. */ 861 lp->stats.rx_packets++; 862 lp->stats.rx_bytes += skb->len; 863 864 /* Send packet to a higher place. */ 865 netif_rx(skb); 866 dev->last_rx = jiffies; 867 } 868 869 static void cops_timeout(struct net_device *dev) 870 { 871 struct cops_local *lp = netdev_priv(dev); 872 int ioaddr = dev->base_addr; 873 874 lp->stats.tx_errors++; 875 if(lp->board==TANGENT) 876 { 877 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 878 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name); 879 } 880 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name); 881 cops_jumpstart(dev); /* Restart the card. */ 882 dev->trans_start = jiffies; 883 netif_wake_queue(dev); 884 } 885 886 887 /* 888 * Make the card transmit a LocalTalk packet. 889 */ 890 891 static int cops_send_packet(struct sk_buff *skb, struct net_device *dev) 892 { 893 struct cops_local *lp = netdev_priv(dev); 894 int ioaddr = dev->base_addr; 895 unsigned long flags; 896 897 /* 898 * Block a timer-based transmit from overlapping. 899 */ 900 901 netif_stop_queue(dev); 902 903 spin_lock_irqsave(&lp->lock, flags); 904 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */ 905 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 906 cpu_relax(); 907 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */ 908 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 909 cpu_relax(); 910 911 /* Output IO length. */ 912 outb(skb->len, ioaddr); 913 if(lp->board == DAYNA) 914 outb(skb->len >> 8, ioaddr); 915 else 916 outb((skb->len >> 8)&0x0FF, ioaddr); 917 918 /* Output IO code. */ 919 outb(LAP_WRITE, ioaddr); 920 921 if(lp->board == DAYNA) /* Check the transmit buffer again. */ 922 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0); 923 924 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */ 925 926 if(lp->board==DAYNA) /* Dayna requires you kick the card */ 927 outb(1, ioaddr+DAYNA_INT_CARD); 928 929 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 930 931 /* Done sending packet, update counters and cleanup. */ 932 lp->stats.tx_packets++; 933 lp->stats.tx_bytes += skb->len; 934 dev->trans_start = jiffies; 935 dev_kfree_skb (skb); 936 return 0; 937 } 938 939 /* 940 * Dummy function to keep the Appletalk layer happy. 941 */ 942 943 static void set_multicast_list(struct net_device *dev) 944 { 945 if(cops_debug >= 3) 946 printk("%s: set_multicast_list executed\n", dev->name); 947 } 948 949 /* 950 * Another Dummy function to keep the Appletalk layer happy. 951 */ 952 953 static int cops_hard_header(struct sk_buff *skb, struct net_device *dev, 954 unsigned short type, void *daddr, void *saddr, 955 unsigned len) 956 { 957 if(cops_debug >= 3) 958 printk("%s: cops_hard_header executed. Wow!\n", dev->name); 959 return 0; 960 } 961 962 /* 963 * System ioctls for the COPS LocalTalk card. 964 */ 965 966 static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 967 { 968 struct cops_local *lp = netdev_priv(dev); 969 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr; 970 struct atalk_addr *aa = (struct atalk_addr *)&lp->node_addr; 971 972 switch(cmd) 973 { 974 case SIOCSIFADDR: 975 /* Get and set the nodeid and network # atalkd wants. */ 976 cops_nodeid(dev, sa->sat_addr.s_node); 977 aa->s_net = sa->sat_addr.s_net; 978 aa->s_node = lp->node_acquire; 979 980 /* Set broardcast address. */ 981 dev->broadcast[0] = 0xFF; 982 983 /* Set hardware address. */ 984 dev->dev_addr[0] = aa->s_node; 985 dev->addr_len = 1; 986 return 0; 987 988 case SIOCGIFADDR: 989 sa->sat_addr.s_net = aa->s_net; 990 sa->sat_addr.s_node = aa->s_node; 991 return 0; 992 993 default: 994 return -EOPNOTSUPP; 995 } 996 } 997 998 /* 999 * The inverse routine to cops_open(). 1000 */ 1001 1002 static int cops_close(struct net_device *dev) 1003 { 1004 struct cops_local *lp = netdev_priv(dev); 1005 1006 /* If we were running polled, yank the timer. 1007 */ 1008 if(lp->board==TANGENT && dev->irq==0) 1009 del_timer(&cops_timer); 1010 1011 netif_stop_queue(dev); 1012 return 0; 1013 } 1014 1015 /* 1016 * Get the current statistics. 1017 * This may be called with the card open or closed. 1018 */ 1019 static struct net_device_stats *cops_get_stats(struct net_device *dev) 1020 { 1021 struct cops_local *lp = netdev_priv(dev); 1022 return &lp->stats; 1023 } 1024 1025 #ifdef MODULE 1026 static struct net_device *cops_dev; 1027 1028 MODULE_LICENSE("GPL"); 1029 module_param(io, int, 0); 1030 module_param(irq, int, 0); 1031 module_param(board_type, int, 0); 1032 1033 int __init init_module(void) 1034 { 1035 if (io == 0) 1036 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", 1037 cardname); 1038 cops_dev = cops_probe(-1); 1039 if (IS_ERR(cops_dev)) 1040 return PTR_ERR(cops_dev); 1041 return 0; 1042 } 1043 1044 void __exit cleanup_module(void) 1045 { 1046 unregister_netdev(cops_dev); 1047 cleanup_card(cops_dev); 1048 free_netdev(cops_dev); 1049 } 1050 #endif /* MODULE */ 1051 1052 /* 1053 * Local variables: 1054 * compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O2 -c cops.c" 1055 * c-basic-offset: 4 1056 * c-file-offsets: ((substatement-open . 0)) 1057 * End: 1058 */ 1059