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