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 #include <linux/jiffies.h> 73 74 #include <asm/system.h> 75 #include <asm/io.h> 76 #include <asm/dma.h> 77 78 #include "cops.h" /* Our Stuff */ 79 #include "cops_ltdrv.h" /* Firmware code for Tangent type cards. */ 80 #include "cops_ffdrv.h" /* Firmware code for Dayna type cards. */ 81 82 /* 83 * The name of the card. Is used for messages and in the requests for 84 * io regions, irqs and dma channels 85 */ 86 87 static const char *cardname = "cops"; 88 89 #ifdef CONFIG_COPS_DAYNA 90 static int board_type = DAYNA; /* Module exported */ 91 #else 92 static int board_type = TANGENT; 93 #endif 94 95 static int io = 0x240; /* Default IO for Dayna */ 96 static int irq = 5; /* Default IRQ */ 97 98 /* 99 * COPS Autoprobe information. 100 * Right now if port address is right but IRQ is not 5 this will 101 * return a 5 no matter what since we will still get a status response. 102 * Need one more additional check to narrow down after we have gotten 103 * the ioaddr. But since only other possible IRQs is 3 and 4 so no real 104 * hurry on this. I *STRONGLY* recommend using IRQ 5 for your card with 105 * this driver. 106 * 107 * This driver has 2 modes and they are: Dayna mode and Tangent mode. 108 * Each mode corresponds with the type of card. It has been found 109 * that there are 2 main types of cards and all other cards are 110 * the same and just have different names or only have minor differences 111 * such as more IO ports. As this driver is tested it will 112 * become more clear on exactly what cards are supported. The driver 113 * defaults to using Dayna mode. To change the drivers mode, simply 114 * select Dayna or Tangent mode when configuring the kernel. 115 * 116 * This driver should support: 117 * TANGENT driver mode: 118 * Tangent ATB-II, Novell NL-1000, Daystar Digital LT-200, 119 * COPS LT-1 120 * DAYNA driver mode: 121 * Dayna DL2000/DaynaTalk PC (Half Length), COPS LT-95, 122 * Farallon PhoneNET PC III, Farallon PhoneNET PC II 123 * Other cards possibly supported mode unkown though: 124 * Dayna DL2000 (Full length), COPS LT/M (Micro-Channel) 125 * 126 * Cards NOT supported by this driver but supported by the ltpc.c 127 * driver written by Bradford W. Johnson <johns393@maroon.tc.umn.edu> 128 * Farallon PhoneNET PC 129 * Original Apple LocalTalk PC card 130 * 131 * N.B. 132 * 133 * The Daystar Digital LT200 boards do not support interrupt-driven 134 * IO. You must specify 'irq=0xff' as a module parameter to invoke 135 * polled mode. I also believe that the port probing logic is quite 136 * dangerous at best and certainly hopeless for a polled card. Best to 137 * specify both. - Steve H. 138 * 139 */ 140 141 /* 142 * Zero terminated list of IO ports to probe. 143 */ 144 145 static unsigned int ports[] = { 146 0x240, 0x340, 0x200, 0x210, 0x220, 0x230, 0x260, 147 0x2A0, 0x300, 0x310, 0x320, 0x330, 0x350, 0x360, 148 0 149 }; 150 151 /* 152 * Zero terminated list of IRQ ports to probe. 153 */ 154 155 static int cops_irqlist[] = { 156 5, 4, 3, 0 157 }; 158 159 static struct timer_list cops_timer; 160 161 /* use 0 for production, 1 for verification, 2 for debug, 3 for verbose debug */ 162 #ifndef COPS_DEBUG 163 #define COPS_DEBUG 1 164 #endif 165 static unsigned int cops_debug = COPS_DEBUG; 166 167 /* The number of low I/O ports used by the card. */ 168 #define COPS_IO_EXTENT 8 169 170 /* Information that needs to be kept for each board. */ 171 172 struct cops_local 173 { 174 struct net_device_stats stats; 175 int board; /* Holds what board type is. */ 176 int nodeid; /* Set to 1 once have nodeid. */ 177 unsigned char node_acquire; /* Node ID when acquired. */ 178 struct atalk_addr node_addr; /* Full node address */ 179 spinlock_t lock; /* RX/TX lock */ 180 }; 181 182 /* Index to functions, as function prototypes. */ 183 static int cops_probe1 (struct net_device *dev, int ioaddr); 184 static int cops_irq (int ioaddr, int board); 185 186 static int cops_open (struct net_device *dev); 187 static int cops_jumpstart (struct net_device *dev); 188 static void cops_reset (struct net_device *dev, int sleep); 189 static void cops_load (struct net_device *dev); 190 static int cops_nodeid (struct net_device *dev, int nodeid); 191 192 static irqreturn_t cops_interrupt (int irq, void *dev_id); 193 static void cops_poll (unsigned long ltdev); 194 static void cops_timeout(struct net_device *dev); 195 static void cops_rx (struct net_device *dev); 196 static int cops_send_packet (struct sk_buff *skb, struct net_device *dev); 197 static void set_multicast_list (struct net_device *dev); 198 static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd); 199 static int cops_close (struct net_device *dev); 200 static struct net_device_stats *cops_get_stats (struct net_device *dev); 201 202 static void cleanup_card(struct net_device *dev) 203 { 204 if (dev->irq) 205 free_irq(dev->irq, dev); 206 release_region(dev->base_addr, COPS_IO_EXTENT); 207 } 208 209 /* 210 * Check for a network adaptor of this type, and return '0' iff one exists. 211 * If dev->base_addr == 0, probe all likely locations. 212 * If dev->base_addr in [1..0x1ff], always return failure. 213 * otherwise go with what we pass in. 214 */ 215 struct net_device * __init cops_probe(int unit) 216 { 217 struct net_device *dev; 218 unsigned *port; 219 int base_addr; 220 int err = 0; 221 222 dev = alloc_ltalkdev(sizeof(struct cops_local)); 223 if (!dev) 224 return ERR_PTR(-ENOMEM); 225 226 if (unit >= 0) { 227 sprintf(dev->name, "lt%d", unit); 228 netdev_boot_setup_check(dev); 229 irq = dev->irq; 230 base_addr = dev->base_addr; 231 } else { 232 base_addr = dev->base_addr = io; 233 } 234 235 if (base_addr > 0x1ff) { /* Check a single specified location. */ 236 err = cops_probe1(dev, base_addr); 237 } else if (base_addr != 0) { /* Don't probe at all. */ 238 err = -ENXIO; 239 } else { 240 /* FIXME Does this really work for cards which generate irq? 241 * It's definitely N.G. for polled Tangent. sh 242 * Dayna cards don't autoprobe well at all, but if your card is 243 * at IRQ 5 & IO 0x240 we find it every time. ;) JS 244 */ 245 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++) 246 ; 247 if (!*port) 248 err = -ENODEV; 249 } 250 if (err) 251 goto out; 252 err = register_netdev(dev); 253 if (err) 254 goto out1; 255 return dev; 256 out1: 257 cleanup_card(dev); 258 out: 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 */ 268 static 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 spin_lock_init(&lp->lock); 332 333 /* Copy local board variable to lp struct. */ 334 lp->board = board; 335 336 dev->hard_start_xmit = cops_send_packet; 337 dev->tx_timeout = cops_timeout; 338 dev->watchdog_timeo = HZ * 2; 339 340 dev->get_stats = cops_get_stats; 341 dev->open = cops_open; 342 dev->stop = cops_close; 343 dev->do_ioctl = cops_ioctl; 344 dev->set_multicast_list = set_multicast_list; 345 dev->mc_list = NULL; 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 lp->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 lp->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 lp->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 lp->stats.rx_packets++; 850 lp->stats.rx_bytes += skb->len; 851 852 /* Send packet to a higher place. */ 853 netif_rx(skb); 854 dev->last_rx = jiffies; 855 } 856 857 static void cops_timeout(struct net_device *dev) 858 { 859 struct cops_local *lp = netdev_priv(dev); 860 int ioaddr = dev->base_addr; 861 862 lp->stats.tx_errors++; 863 if(lp->board==TANGENT) 864 { 865 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 866 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name); 867 } 868 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name); 869 cops_jumpstart(dev); /* Restart the card. */ 870 dev->trans_start = jiffies; 871 netif_wake_queue(dev); 872 } 873 874 875 /* 876 * Make the card transmit a LocalTalk packet. 877 */ 878 879 static int cops_send_packet(struct sk_buff *skb, 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 lp->stats.tx_packets++; 921 lp->stats.tx_bytes += skb->len; 922 dev->trans_start = jiffies; 923 dev_kfree_skb (skb); 924 return 0; 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 * Get the current statistics. 992 * This may be called with the card open or closed. 993 */ 994 static struct net_device_stats *cops_get_stats(struct net_device *dev) 995 { 996 struct cops_local *lp = netdev_priv(dev); 997 return &lp->stats; 998 } 999 1000 #ifdef MODULE 1001 static struct net_device *cops_dev; 1002 1003 MODULE_LICENSE("GPL"); 1004 module_param(io, int, 0); 1005 module_param(irq, int, 0); 1006 module_param(board_type, int, 0); 1007 1008 static int __init cops_module_init(void) 1009 { 1010 if (io == 0) 1011 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", 1012 cardname); 1013 cops_dev = cops_probe(-1); 1014 if (IS_ERR(cops_dev)) 1015 return PTR_ERR(cops_dev); 1016 return 0; 1017 } 1018 1019 static void __exit cops_module_exit(void) 1020 { 1021 unregister_netdev(cops_dev); 1022 cleanup_card(cops_dev); 1023 free_netdev(cops_dev); 1024 } 1025 module_init(cops_module_init); 1026 module_exit(cops_module_exit); 1027 #endif /* MODULE */ 1028 1029 /* 1030 * Local variables: 1031 * compile-command: "gcc -DMODVERSIONS -DMODULE -D__KERNEL__ -Wall -Wstrict-prototypes -O2 -c cops.c" 1032 * c-basic-offset: 4 1033 * c-file-offsets: ((substatement-open . 0)) 1034 * End: 1035 */ 1036