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/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 unknown 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 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 netdev_tx_t cops_send_packet (struct sk_buff *skb, 196 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); 200 201 static void cleanup_card(struct net_device *dev) 202 { 203 if (dev->irq) 204 free_irq(dev->irq, dev); 205 release_region(dev->base_addr, COPS_IO_EXTENT); 206 } 207 208 /* 209 * Check for a network adaptor of this type, and return '0' iff one exists. 210 * If dev->base_addr == 0, probe all likely locations. 211 * If dev->base_addr in [1..0x1ff], always return failure. 212 * otherwise go with what we pass in. 213 */ 214 struct net_device * __init cops_probe(int unit) 215 { 216 struct net_device *dev; 217 unsigned *port; 218 int base_addr; 219 int err = 0; 220 221 dev = alloc_ltalkdev(sizeof(struct cops_local)); 222 if (!dev) 223 return ERR_PTR(-ENOMEM); 224 225 if (unit >= 0) { 226 sprintf(dev->name, "lt%d", unit); 227 netdev_boot_setup_check(dev); 228 irq = dev->irq; 229 base_addr = dev->base_addr; 230 } else { 231 base_addr = dev->base_addr = io; 232 } 233 234 if (base_addr > 0x1ff) { /* Check a single specified location. */ 235 err = cops_probe1(dev, base_addr); 236 } else if (base_addr != 0) { /* Don't probe at all. */ 237 err = -ENXIO; 238 } else { 239 /* FIXME Does this really work for cards which generate irq? 240 * It's definitely N.G. for polled Tangent. sh 241 * Dayna cards don't autoprobe well at all, but if your card is 242 * at IRQ 5 & IO 0x240 we find it every time. ;) JS 243 */ 244 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++) 245 ; 246 if (!*port) 247 err = -ENODEV; 248 } 249 if (err) 250 goto out; 251 err = register_netdev(dev); 252 if (err) 253 goto out1; 254 return dev; 255 out1: 256 cleanup_card(dev); 257 out: 258 free_netdev(dev); 259 return ERR_PTR(err); 260 } 261 262 static const struct net_device_ops cops_netdev_ops = { 263 .ndo_open = cops_open, 264 .ndo_stop = cops_close, 265 .ndo_start_xmit = cops_send_packet, 266 .ndo_tx_timeout = cops_timeout, 267 .ndo_do_ioctl = cops_ioctl, 268 .ndo_set_multicast_list = set_multicast_list, 269 }; 270 271 /* 272 * This is the real probe routine. Linux has a history of friendly device 273 * probes on the ISA bus. A good device probes avoids doing writes, and 274 * verifies that the correct device exists and functions. 275 */ 276 static int __init cops_probe1(struct net_device *dev, int ioaddr) 277 { 278 struct cops_local *lp; 279 static unsigned version_printed; 280 int board = board_type; 281 int retval; 282 283 if(cops_debug && version_printed++ == 0) 284 printk("%s", version); 285 286 /* Grab the region so no one else tries to probe our ioports. */ 287 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name)) 288 return -EBUSY; 289 290 /* 291 * Since this board has jumpered interrupts, allocate the interrupt 292 * vector now. There is no point in waiting since no other device 293 * can use the interrupt, and this marks the irq as busy. Jumpered 294 * interrupts are typically not reported by the boards, and we must 295 * used AutoIRQ to find them. 296 */ 297 dev->irq = irq; 298 switch (dev->irq) 299 { 300 case 0: 301 /* COPS AutoIRQ routine */ 302 dev->irq = cops_irq(ioaddr, board); 303 if (dev->irq) 304 break; 305 /* No IRQ found on this port, fallthrough */ 306 case 1: 307 retval = -EINVAL; 308 goto err_out; 309 310 /* Fixup for users that don't know that IRQ 2 is really 311 * IRQ 9, or don't know which one to set. 312 */ 313 case 2: 314 dev->irq = 9; 315 break; 316 317 /* Polled operation requested. Although irq of zero passed as 318 * a parameter tells the init routines to probe, we'll 319 * overload it to denote polled operation at runtime. 320 */ 321 case 0xff: 322 dev->irq = 0; 323 break; 324 325 default: 326 break; 327 } 328 329 /* Reserve any actual interrupt. */ 330 if (dev->irq) { 331 retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev); 332 if (retval) 333 goto err_out; 334 } 335 336 dev->base_addr = ioaddr; 337 338 lp = netdev_priv(dev); 339 spin_lock_init(&lp->lock); 340 341 /* Copy local board variable to lp struct. */ 342 lp->board = board; 343 344 dev->netdev_ops = &cops_netdev_ops; 345 dev->watchdog_timeo = HZ * 2; 346 347 348 /* Tell the user where the card is and what mode we're in. */ 349 if(board==DAYNA) 350 printk("%s: %s at %#3x, using IRQ %d, in Dayna mode.\n", 351 dev->name, cardname, ioaddr, dev->irq); 352 if(board==TANGENT) { 353 if(dev->irq) 354 printk("%s: %s at %#3x, IRQ %d, in Tangent mode\n", 355 dev->name, cardname, ioaddr, dev->irq); 356 else 357 printk("%s: %s at %#3x, using polled IO, in Tangent mode.\n", 358 dev->name, cardname, ioaddr); 359 360 } 361 return 0; 362 363 err_out: 364 release_region(ioaddr, COPS_IO_EXTENT); 365 return retval; 366 } 367 368 static int __init cops_irq (int ioaddr, int board) 369 { /* 370 * This does not use the IRQ to determine where the IRQ is. We just 371 * assume that when we get a correct status response that it's the IRQ. 372 * This really just verifies the IO port but since we only have access 373 * to such a small number of IRQs (5, 4, 3) this is not bad. 374 * This will probably not work for more than one card. 375 */ 376 int irqaddr=0; 377 int i, x, status; 378 379 if(board==DAYNA) 380 { 381 outb(0, ioaddr+DAYNA_RESET); 382 inb(ioaddr+DAYNA_RESET); 383 mdelay(333); 384 } 385 if(board==TANGENT) 386 { 387 inb(ioaddr); 388 outb(0, ioaddr); 389 outb(0, ioaddr+TANG_RESET); 390 } 391 392 for(i=0; cops_irqlist[i] !=0; i++) 393 { 394 irqaddr = cops_irqlist[i]; 395 for(x = 0xFFFF; x>0; x --) /* wait for response */ 396 { 397 if(board==DAYNA) 398 { 399 status = (inb(ioaddr+DAYNA_CARD_STATUS)&3); 400 if(status == 1) 401 return irqaddr; 402 } 403 if(board==TANGENT) 404 { 405 if((inb(ioaddr+TANG_CARD_STATUS)& TANG_TX_READY) !=0) 406 return irqaddr; 407 } 408 } 409 } 410 return 0; /* no IRQ found */ 411 } 412 413 /* 414 * Open/initialize the board. This is called (in the current kernel) 415 * sometime after booting when the 'ifconfig' program is run. 416 */ 417 static int cops_open(struct net_device *dev) 418 { 419 struct cops_local *lp = netdev_priv(dev); 420 421 if(dev->irq==0) 422 { 423 /* 424 * I don't know if the Dayna-style boards support polled 425 * operation. For now, only allow it for Tangent. 426 */ 427 if(lp->board==TANGENT) /* Poll 20 times per second */ 428 { 429 init_timer(&cops_timer); 430 cops_timer.function = cops_poll; 431 cops_timer.data = (unsigned long)dev; 432 cops_timer.expires = jiffies + HZ/20; 433 add_timer(&cops_timer); 434 } 435 else 436 { 437 printk(KERN_WARNING "%s: No irq line set\n", dev->name); 438 return -EAGAIN; 439 } 440 } 441 442 cops_jumpstart(dev); /* Start the card up. */ 443 444 netif_start_queue(dev); 445 return 0; 446 } 447 448 /* 449 * This allows for a dynamic start/restart of the entire card. 450 */ 451 static int cops_jumpstart(struct net_device *dev) 452 { 453 struct cops_local *lp = netdev_priv(dev); 454 455 /* 456 * Once the card has the firmware loaded and has acquired 457 * the nodeid, if it is reset it will lose it all. 458 */ 459 cops_reset(dev,1); /* Need to reset card before load firmware. */ 460 cops_load(dev); /* Load the firmware. */ 461 462 /* 463 * If atalkd already gave us a nodeid we will use that 464 * one again, else we wait for atalkd to give us a nodeid 465 * in cops_ioctl. This may cause a problem if someone steals 466 * our nodeid while we are resetting. 467 */ 468 if(lp->nodeid == 1) 469 cops_nodeid(dev,lp->node_acquire); 470 471 return 0; 472 } 473 474 static void tangent_wait_reset(int ioaddr) 475 { 476 int timeout=0; 477 478 while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 479 mdelay(1); /* Wait 1 second */ 480 } 481 482 /* 483 * Reset the LocalTalk board. 484 */ 485 static void cops_reset(struct net_device *dev, int sleep) 486 { 487 struct cops_local *lp = netdev_priv(dev); 488 int ioaddr=dev->base_addr; 489 490 if(lp->board==TANGENT) 491 { 492 inb(ioaddr); /* Clear request latch. */ 493 outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */ 494 outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */ 495 496 tangent_wait_reset(ioaddr); 497 outb(0, ioaddr+TANG_CLEAR_INT); 498 } 499 if(lp->board==DAYNA) 500 { 501 outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */ 502 inb(ioaddr+DAYNA_RESET); /* Clear the reset */ 503 if (sleep) 504 msleep(333); 505 else 506 mdelay(333); 507 } 508 509 netif_wake_queue(dev); 510 } 511 512 static void cops_load (struct net_device *dev) 513 { 514 struct ifreq ifr; 515 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru; 516 struct cops_local *lp = netdev_priv(dev); 517 int ioaddr=dev->base_addr; 518 int length, i = 0; 519 520 strcpy(ifr.ifr_name,"lt0"); 521 522 /* Get card's firmware code and do some checks on it. */ 523 #ifdef CONFIG_COPS_DAYNA 524 if(lp->board==DAYNA) 525 { 526 ltf->length=sizeof(ffdrv_code); 527 ltf->data=ffdrv_code; 528 } 529 else 530 #endif 531 #ifdef CONFIG_COPS_TANGENT 532 if(lp->board==TANGENT) 533 { 534 ltf->length=sizeof(ltdrv_code); 535 ltf->data=ltdrv_code; 536 } 537 else 538 #endif 539 { 540 printk(KERN_INFO "%s; unsupported board type.\n", dev->name); 541 return; 542 } 543 544 /* Check to make sure firmware is correct length. */ 545 if(lp->board==DAYNA && ltf->length!=5983) 546 { 547 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name); 548 return; 549 } 550 if(lp->board==TANGENT && ltf->length!=2501) 551 { 552 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name); 553 return; 554 } 555 556 if(lp->board==DAYNA) 557 { 558 /* 559 * We must wait for a status response 560 * with the DAYNA board. 561 */ 562 while(++i<65536) 563 { 564 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1) 565 break; 566 } 567 568 if(i==65536) 569 return; 570 } 571 572 /* 573 * Upload the firmware and kick. Byte-by-byte works nicely here. 574 */ 575 i=0; 576 length = ltf->length; 577 while(length--) 578 { 579 outb(ltf->data[i], ioaddr); 580 i++; 581 } 582 583 if(cops_debug > 1) 584 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n", 585 dev->name, i, ltf->length); 586 587 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */ 588 outb(1, ioaddr+DAYNA_INT_CARD); 589 else /* Tell Tang to run the firmware code. */ 590 inb(ioaddr); 591 592 if(lp->board==TANGENT) 593 { 594 tangent_wait_reset(ioaddr); 595 inb(ioaddr); /* Clear initial ready signal. */ 596 } 597 598 return; 599 } 600 601 /* 602 * Get the LocalTalk Nodeid from the card. We can suggest 603 * any nodeid 1-254. The card will try and get that exact 604 * address else we can specify 0 as the nodeid and the card 605 * will autoprobe for a nodeid. 606 */ 607 static int cops_nodeid (struct net_device *dev, int nodeid) 608 { 609 struct cops_local *lp = netdev_priv(dev); 610 int ioaddr = dev->base_addr; 611 612 if(lp->board == DAYNA) 613 { 614 /* Empty any pending adapter responses. */ 615 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 616 { 617 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */ 618 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 619 cops_rx(dev); /* Kick any packets waiting. */ 620 schedule(); 621 } 622 623 outb(2, ioaddr); /* Output command packet length as 2. */ 624 outb(0, ioaddr); 625 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */ 626 outb(nodeid, ioaddr); /* Suggest node address. */ 627 } 628 629 if(lp->board == TANGENT) 630 { 631 /* Empty any pending adapter responses. */ 632 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 633 { 634 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */ 635 cops_rx(dev); /* Kick out packets waiting. */ 636 schedule(); 637 } 638 639 /* Not sure what Tangent does if nodeid picked is used. */ 640 if(nodeid == 0) /* Seed. */ 641 nodeid = jiffies&0xFF; /* Get a random try */ 642 outb(2, ioaddr); /* Command length LSB */ 643 outb(0, ioaddr); /* Command length MSB */ 644 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */ 645 outb(nodeid, ioaddr); /* LAP address hint. */ 646 outb(0xFF, ioaddr); /* Int. level to use */ 647 } 648 649 lp->node_acquire=0; /* Set nodeid holder to 0. */ 650 while(lp->node_acquire==0) /* Get *True* nodeid finally. */ 651 { 652 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */ 653 654 if(lp->board == DAYNA) 655 { 656 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 657 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 658 } 659 if(lp->board == TANGENT) 660 { 661 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 662 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 663 } 664 schedule(); 665 } 666 667 if(cops_debug > 1) 668 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n", 669 dev->name, lp->node_acquire); 670 671 lp->nodeid=1; /* Set got nodeid to 1. */ 672 673 return 0; 674 } 675 676 /* 677 * Poll the Tangent type cards to see if we have work. 678 */ 679 680 static void cops_poll(unsigned long ltdev) 681 { 682 int ioaddr, status; 683 int boguscount = 0; 684 685 struct net_device *dev = (struct net_device *)ltdev; 686 687 del_timer(&cops_timer); 688 689 if(dev == NULL) 690 return; /* We've been downed */ 691 692 ioaddr = dev->base_addr; 693 do { 694 status=inb(ioaddr+TANG_CARD_STATUS); 695 if(status & TANG_RX_READY) 696 cops_rx(dev); 697 if(status & TANG_TX_READY) 698 netif_wake_queue(dev); 699 status = inb(ioaddr+TANG_CARD_STATUS); 700 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 701 702 /* poll 20 times per second */ 703 cops_timer.expires = jiffies + HZ/20; 704 add_timer(&cops_timer); 705 706 return; 707 } 708 709 /* 710 * The typical workload of the driver: 711 * Handle the network interface interrupts. 712 */ 713 static irqreturn_t cops_interrupt(int irq, void *dev_id) 714 { 715 struct net_device *dev = dev_id; 716 struct cops_local *lp; 717 int ioaddr, status; 718 int boguscount = 0; 719 720 ioaddr = dev->base_addr; 721 lp = netdev_priv(dev); 722 723 if(lp->board==DAYNA) 724 { 725 do { 726 outb(0, ioaddr + COPS_CLEAR_INT); 727 status=inb(ioaddr+DAYNA_CARD_STATUS); 728 if((status&0x03)==DAYNA_RX_REQUEST) 729 cops_rx(dev); 730 netif_wake_queue(dev); 731 } while(++boguscount < 20); 732 } 733 else 734 { 735 do { 736 status=inb(ioaddr+TANG_CARD_STATUS); 737 if(status & TANG_RX_READY) 738 cops_rx(dev); 739 if(status & TANG_TX_READY) 740 netif_wake_queue(dev); 741 status=inb(ioaddr+TANG_CARD_STATUS); 742 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 743 } 744 745 return IRQ_HANDLED; 746 } 747 748 /* 749 * We have a good packet(s), get it/them out of the buffers. 750 */ 751 static void cops_rx(struct net_device *dev) 752 { 753 int pkt_len = 0; 754 int rsp_type = 0; 755 struct sk_buff *skb = NULL; 756 struct cops_local *lp = netdev_priv(dev); 757 int ioaddr = dev->base_addr; 758 int boguscount = 0; 759 unsigned long flags; 760 761 762 spin_lock_irqsave(&lp->lock, flags); 763 764 if(lp->board==DAYNA) 765 { 766 outb(0, ioaddr); /* Send out Zero length. */ 767 outb(0, ioaddr); 768 outb(DATA_READ, ioaddr); /* Send read command out. */ 769 770 /* Wait for DMA to turn around. */ 771 while(++boguscount<1000000) 772 { 773 barrier(); 774 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY) 775 break; 776 } 777 778 if(boguscount==1000000) 779 { 780 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name); 781 spin_unlock_irqrestore(&lp->lock, flags); 782 return; 783 } 784 } 785 786 /* Get response length. */ 787 if(lp->board==DAYNA) 788 pkt_len = inb(ioaddr) & 0xFF; 789 else 790 pkt_len = inb(ioaddr) & 0x00FF; 791 pkt_len |= (inb(ioaddr) << 8); 792 /* Input IO code. */ 793 rsp_type=inb(ioaddr); 794 795 /* Malloc up new buffer. */ 796 skb = dev_alloc_skb(pkt_len); 797 if(skb == NULL) 798 { 799 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", 800 dev->name); 801 dev->stats.rx_dropped++; 802 while(pkt_len--) /* Discard packet */ 803 inb(ioaddr); 804 spin_unlock_irqrestore(&lp->lock, flags); 805 return; 806 } 807 skb->dev = dev; 808 skb_put(skb, pkt_len); 809 skb->protocol = htons(ETH_P_LOCALTALK); 810 811 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */ 812 813 if(lp->board==DAYNA) 814 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */ 815 816 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 817 818 /* Check for bad response length */ 819 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE) 820 { 821 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n", 822 dev->name, pkt_len); 823 dev->stats.tx_errors++; 824 dev_kfree_skb_any(skb); 825 return; 826 } 827 828 /* Set nodeid and then get out. */ 829 if(rsp_type == LAP_INIT_RSP) 830 { /* Nodeid taken from received packet. */ 831 lp->node_acquire = skb->data[0]; 832 dev_kfree_skb_any(skb); 833 return; 834 } 835 836 /* One last check to make sure we have a good packet. */ 837 if(rsp_type != LAP_RESPONSE) 838 { 839 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type); 840 dev->stats.tx_errors++; 841 dev_kfree_skb_any(skb); 842 return; 843 } 844 845 skb_reset_mac_header(skb); /* Point to entire packet. */ 846 skb_pull(skb,3); 847 skb_reset_transport_header(skb); /* Point to data (Skip header). */ 848 849 /* Update the counters. */ 850 dev->stats.rx_packets++; 851 dev->stats.rx_bytes += skb->len; 852 853 /* Send packet to a higher place. */ 854 netif_rx(skb); 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 dev->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 netdev_tx_t cops_send_packet(struct sk_buff *skb, 880 struct net_device *dev) 881 { 882 struct cops_local *lp = netdev_priv(dev); 883 int ioaddr = dev->base_addr; 884 unsigned long flags; 885 886 /* 887 * Block a timer-based transmit from overlapping. 888 */ 889 890 netif_stop_queue(dev); 891 892 spin_lock_irqsave(&lp->lock, flags); 893 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */ 894 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 895 cpu_relax(); 896 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */ 897 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 898 cpu_relax(); 899 900 /* Output IO length. */ 901 outb(skb->len, ioaddr); 902 if(lp->board == DAYNA) 903 outb(skb->len >> 8, ioaddr); 904 else 905 outb((skb->len >> 8)&0x0FF, ioaddr); 906 907 /* Output IO code. */ 908 outb(LAP_WRITE, ioaddr); 909 910 if(lp->board == DAYNA) /* Check the transmit buffer again. */ 911 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0); 912 913 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */ 914 915 if(lp->board==DAYNA) /* Dayna requires you kick the card */ 916 outb(1, ioaddr+DAYNA_INT_CARD); 917 918 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 919 920 /* Done sending packet, update counters and cleanup. */ 921 dev->stats.tx_packets++; 922 dev->stats.tx_bytes += skb->len; 923 dev->trans_start = jiffies; 924 dev_kfree_skb (skb); 925 return NETDEV_TX_OK; 926 } 927 928 /* 929 * Dummy function to keep the Appletalk layer happy. 930 */ 931 932 static void set_multicast_list(struct net_device *dev) 933 { 934 if(cops_debug >= 3) 935 printk("%s: set_multicast_list executed\n", dev->name); 936 } 937 938 /* 939 * System ioctls for the COPS LocalTalk card. 940 */ 941 942 static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 943 { 944 struct cops_local *lp = netdev_priv(dev); 945 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr; 946 struct atalk_addr *aa = (struct atalk_addr *)&lp->node_addr; 947 948 switch(cmd) 949 { 950 case SIOCSIFADDR: 951 /* Get and set the nodeid and network # atalkd wants. */ 952 cops_nodeid(dev, sa->sat_addr.s_node); 953 aa->s_net = sa->sat_addr.s_net; 954 aa->s_node = lp->node_acquire; 955 956 /* Set broardcast address. */ 957 dev->broadcast[0] = 0xFF; 958 959 /* Set hardware address. */ 960 dev->dev_addr[0] = aa->s_node; 961 dev->addr_len = 1; 962 return 0; 963 964 case SIOCGIFADDR: 965 sa->sat_addr.s_net = aa->s_net; 966 sa->sat_addr.s_node = aa->s_node; 967 return 0; 968 969 default: 970 return -EOPNOTSUPP; 971 } 972 } 973 974 /* 975 * The inverse routine to cops_open(). 976 */ 977 978 static int cops_close(struct net_device *dev) 979 { 980 struct cops_local *lp = netdev_priv(dev); 981 982 /* If we were running polled, yank the timer. 983 */ 984 if(lp->board==TANGENT && dev->irq==0) 985 del_timer(&cops_timer); 986 987 netif_stop_queue(dev); 988 return 0; 989 } 990 991 992 #ifdef MODULE 993 static struct net_device *cops_dev; 994 995 MODULE_LICENSE("GPL"); 996 module_param(io, int, 0); 997 module_param(irq, int, 0); 998 module_param(board_type, int, 0); 999 1000 static int __init cops_module_init(void) 1001 { 1002 if (io == 0) 1003 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", 1004 cardname); 1005 cops_dev = cops_probe(-1); 1006 if (IS_ERR(cops_dev)) 1007 return PTR_ERR(cops_dev); 1008 return 0; 1009 } 1010 1011 static void __exit cops_module_exit(void) 1012 { 1013 unregister_netdev(cops_dev); 1014 cleanup_card(cops_dev); 1015 free_netdev(cops_dev); 1016 } 1017 module_init(cops_module_init); 1018 module_exit(cops_module_exit); 1019 #endif /* MODULE */ 1020