1 /* cops.c: LocalTalk driver for Linux. 2 * 3 * Authors: 4 * - Jay Schulist <jschlst@samba.org> 5 * 6 * With more than a little help from; 7 * - Alan Cox <alan@lxorguk.ukuu.org.uk> 8 * 9 * Derived from: 10 * - skeleton.c: A network driver outline for linux. 11 * Written 1993-94 by Donald Becker. 12 * - ltpc.c: A driver for the LocalTalk PC card. 13 * Written by Bradford W. Johnson. 14 * 15 * Copyright 1993 United States Government as represented by the 16 * Director, National Security Agency. 17 * 18 * This software may be used and distributed according to the terms 19 * of the GNU General Public License, incorporated herein by reference. 20 * 21 * Changes: 22 * 19970608 Alan Cox Allowed dual card type support 23 * Can set board type in insmod 24 * Hooks for cops_setup routine 25 * (not yet implemented). 26 * 19971101 Jay Schulist Fixes for multiple lt* devices. 27 * 19980607 Steven Hirsch Fixed the badly broken support 28 * for Tangent type cards. Only 29 * tested on Daystar LT200. Some 30 * cleanup of formatting and program 31 * logic. Added emacs 'local-vars' 32 * setup for Jay's brace style. 33 * 20000211 Alan Cox Cleaned up for softnet 34 */ 35 36 static const char *version = 37 "cops.c:v0.04 6/7/98 Jay Schulist <jschlst@samba.org>\n"; 38 /* 39 * Sources: 40 * COPS Localtalk SDK. This provides almost all of the information 41 * needed. 42 */ 43 44 /* 45 * insmod/modprobe configurable stuff. 46 * - IO Port, choose one your card supports or 0 if you dare. 47 * - IRQ, also choose one your card supports or nothing and let 48 * the driver figure it out. 49 */ 50 51 #include <linux/module.h> 52 #include <linux/kernel.h> 53 #include <linux/types.h> 54 #include <linux/fcntl.h> 55 #include <linux/interrupt.h> 56 #include <linux/ptrace.h> 57 #include <linux/ioport.h> 58 #include <linux/in.h> 59 #include <linux/string.h> 60 #include <linux/errno.h> 61 #include <linux/init.h> 62 #include <linux/netdevice.h> 63 #include <linux/etherdevice.h> 64 #include <linux/skbuff.h> 65 #include <linux/if_arp.h> 66 #include <linux/if_ltalk.h> 67 #include <linux/delay.h> /* For udelay() */ 68 #include <linux/atalk.h> 69 #include <linux/spinlock.h> 70 #include <linux/bitops.h> 71 #include <linux/jiffies.h> 72 73 #include <asm/io.h> 74 #include <asm/dma.h> 75 76 #include "cops.h" /* Our Stuff */ 77 #include "cops_ltdrv.h" /* Firmware code for Tangent type cards. */ 78 #include "cops_ffdrv.h" /* Firmware code for Dayna type cards. */ 79 80 /* 81 * The name of the card. Is used for messages and in the requests for 82 * io regions, irqs and dma channels 83 */ 84 85 static const char *cardname = "cops"; 86 87 #ifdef CONFIG_COPS_DAYNA 88 static int board_type = DAYNA; /* Module exported */ 89 #else 90 static int board_type = TANGENT; 91 #endif 92 93 static int io = 0x240; /* Default IO for Dayna */ 94 static int irq = 5; /* Default IRQ */ 95 96 /* 97 * COPS Autoprobe information. 98 * Right now if port address is right but IRQ is not 5 this will 99 * return a 5 no matter what since we will still get a status response. 100 * Need one more additional check to narrow down after we have gotten 101 * the ioaddr. But since only other possible IRQs is 3 and 4 so no real 102 * hurry on this. I *STRONGLY* recommend using IRQ 5 for your card with 103 * this driver. 104 * 105 * This driver has 2 modes and they are: Dayna mode and Tangent mode. 106 * Each mode corresponds with the type of card. It has been found 107 * that there are 2 main types of cards and all other cards are 108 * the same and just have different names or only have minor differences 109 * such as more IO ports. As this driver is tested it will 110 * become more clear on exactly what cards are supported. The driver 111 * defaults to using Dayna mode. To change the drivers mode, simply 112 * select Dayna or Tangent mode when configuring the kernel. 113 * 114 * This driver should support: 115 * TANGENT driver mode: 116 * Tangent ATB-II, Novell NL-1000, Daystar Digital LT-200, 117 * COPS LT-1 118 * DAYNA driver mode: 119 * Dayna DL2000/DaynaTalk PC (Half Length), COPS LT-95, 120 * Farallon PhoneNET PC III, Farallon PhoneNET PC II 121 * Other cards possibly supported mode unknown though: 122 * Dayna DL2000 (Full length), COPS LT/M (Micro-Channel) 123 * 124 * Cards NOT supported by this driver but supported by the ltpc.c 125 * driver written by Bradford W. Johnson <johns393@maroon.tc.umn.edu> 126 * Farallon PhoneNET PC 127 * Original Apple LocalTalk PC card 128 * 129 * N.B. 130 * 131 * The Daystar Digital LT200 boards do not support interrupt-driven 132 * IO. You must specify 'irq=0xff' as a module parameter to invoke 133 * polled mode. I also believe that the port probing logic is quite 134 * dangerous at best and certainly hopeless for a polled card. Best to 135 * specify both. - Steve H. 136 * 137 */ 138 139 /* 140 * Zero terminated list of IO ports to probe. 141 */ 142 143 static unsigned int ports[] = { 144 0x240, 0x340, 0x200, 0x210, 0x220, 0x230, 0x260, 145 0x2A0, 0x300, 0x310, 0x320, 0x330, 0x350, 0x360, 146 0 147 }; 148 149 /* 150 * Zero terminated list of IRQ ports to probe. 151 */ 152 153 static int cops_irqlist[] = { 154 5, 4, 3, 0 155 }; 156 157 static struct timer_list cops_timer; 158 159 /* use 0 for production, 1 for verification, 2 for debug, 3 for verbose debug */ 160 #ifndef COPS_DEBUG 161 #define COPS_DEBUG 1 162 #endif 163 static unsigned int cops_debug = COPS_DEBUG; 164 165 /* The number of low I/O ports used by the card. */ 166 #define COPS_IO_EXTENT 8 167 168 /* Information that needs to be kept for each board. */ 169 170 struct cops_local 171 { 172 int board; /* Holds what board type is. */ 173 int nodeid; /* Set to 1 once have nodeid. */ 174 unsigned char node_acquire; /* Node ID when acquired. */ 175 struct atalk_addr node_addr; /* Full node address */ 176 spinlock_t lock; /* RX/TX lock */ 177 }; 178 179 /* Index to functions, as function prototypes. */ 180 static int cops_probe1 (struct net_device *dev, int ioaddr); 181 static int cops_irq (int ioaddr, int board); 182 183 static int cops_open (struct net_device *dev); 184 static int cops_jumpstart (struct net_device *dev); 185 static void cops_reset (struct net_device *dev, int sleep); 186 static void cops_load (struct net_device *dev); 187 static int cops_nodeid (struct net_device *dev, int nodeid); 188 189 static irqreturn_t cops_interrupt (int irq, void *dev_id); 190 static void cops_poll (unsigned long ltdev); 191 static void cops_timeout(struct net_device *dev); 192 static void cops_rx (struct net_device *dev); 193 static netdev_tx_t cops_send_packet (struct sk_buff *skb, 194 struct net_device *dev); 195 static void set_multicast_list (struct net_device *dev); 196 static int cops_ioctl (struct net_device *dev, struct ifreq *rq, int cmd); 197 static int cops_close (struct net_device *dev); 198 199 static void cleanup_card(struct net_device *dev) 200 { 201 if (dev->irq) 202 free_irq(dev->irq, dev); 203 release_region(dev->base_addr, COPS_IO_EXTENT); 204 } 205 206 /* 207 * Check for a network adaptor of this type, and return '0' iff one exists. 208 * If dev->base_addr == 0, probe all likely locations. 209 * If dev->base_addr in [1..0x1ff], always return failure. 210 * otherwise go with what we pass in. 211 */ 212 struct net_device * __init cops_probe(int unit) 213 { 214 struct net_device *dev; 215 unsigned *port; 216 int base_addr; 217 int err = 0; 218 219 dev = alloc_ltalkdev(sizeof(struct cops_local)); 220 if (!dev) 221 return ERR_PTR(-ENOMEM); 222 223 if (unit >= 0) { 224 sprintf(dev->name, "lt%d", unit); 225 netdev_boot_setup_check(dev); 226 irq = dev->irq; 227 base_addr = dev->base_addr; 228 } else { 229 base_addr = dev->base_addr = io; 230 } 231 232 if (base_addr > 0x1ff) { /* Check a single specified location. */ 233 err = cops_probe1(dev, base_addr); 234 } else if (base_addr != 0) { /* Don't probe at all. */ 235 err = -ENXIO; 236 } else { 237 /* FIXME Does this really work for cards which generate irq? 238 * It's definitely N.G. for polled Tangent. sh 239 * Dayna cards don't autoprobe well at all, but if your card is 240 * at IRQ 5 & IO 0x240 we find it every time. ;) JS 241 */ 242 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++) 243 ; 244 if (!*port) 245 err = -ENODEV; 246 } 247 if (err) 248 goto out; 249 err = register_netdev(dev); 250 if (err) 251 goto out1; 252 return dev; 253 out1: 254 cleanup_card(dev); 255 out: 256 free_netdev(dev); 257 return ERR_PTR(err); 258 } 259 260 static const struct net_device_ops cops_netdev_ops = { 261 .ndo_open = cops_open, 262 .ndo_stop = cops_close, 263 .ndo_start_xmit = cops_send_packet, 264 .ndo_tx_timeout = cops_timeout, 265 .ndo_do_ioctl = cops_ioctl, 266 .ndo_set_rx_mode = set_multicast_list, 267 }; 268 269 /* 270 * This is the real probe routine. Linux has a history of friendly device 271 * probes on the ISA bus. A good device probes avoids doing writes, and 272 * verifies that the correct device exists and functions. 273 */ 274 static int __init cops_probe1(struct net_device *dev, int ioaddr) 275 { 276 struct cops_local *lp; 277 static unsigned version_printed; 278 int board = board_type; 279 int retval; 280 281 if(cops_debug && version_printed++ == 0) 282 printk("%s", version); 283 284 /* Grab the region so no one else tries to probe our ioports. */ 285 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name)) 286 return -EBUSY; 287 288 /* 289 * Since this board has jumpered interrupts, allocate the interrupt 290 * vector now. There is no point in waiting since no other device 291 * can use the interrupt, and this marks the irq as busy. Jumpered 292 * interrupts are typically not reported by the boards, and we must 293 * used AutoIRQ to find them. 294 */ 295 dev->irq = irq; 296 switch (dev->irq) 297 { 298 case 0: 299 /* COPS AutoIRQ routine */ 300 dev->irq = cops_irq(ioaddr, board); 301 if (dev->irq) 302 break; 303 /* No IRQ found on this port, fallthrough */ 304 case 1: 305 retval = -EINVAL; 306 goto err_out; 307 308 /* Fixup for users that don't know that IRQ 2 is really 309 * IRQ 9, or don't know which one to set. 310 */ 311 case 2: 312 dev->irq = 9; 313 break; 314 315 /* Polled operation requested. Although irq of zero passed as 316 * a parameter tells the init routines to probe, we'll 317 * overload it to denote polled operation at runtime. 318 */ 319 case 0xff: 320 dev->irq = 0; 321 break; 322 323 default: 324 break; 325 } 326 327 /* Reserve any actual interrupt. */ 328 if (dev->irq) { 329 retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev); 330 if (retval) 331 goto err_out; 332 } 333 334 dev->base_addr = ioaddr; 335 336 lp = netdev_priv(dev); 337 spin_lock_init(&lp->lock); 338 339 /* Copy local board variable to lp struct. */ 340 lp->board = board; 341 342 dev->netdev_ops = &cops_netdev_ops; 343 dev->watchdog_timeo = HZ * 2; 344 345 346 /* 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 setup_timer(&cops_timer, cops_poll, (unsigned long)dev); 428 cops_timer.expires = jiffies + HZ/20; 429 add_timer(&cops_timer); 430 } 431 else 432 { 433 printk(KERN_WARNING "%s: No irq line set\n", dev->name); 434 return -EAGAIN; 435 } 436 } 437 438 cops_jumpstart(dev); /* Start the card up. */ 439 440 netif_start_queue(dev); 441 return 0; 442 } 443 444 /* 445 * This allows for a dynamic start/restart of the entire card. 446 */ 447 static int cops_jumpstart(struct net_device *dev) 448 { 449 struct cops_local *lp = netdev_priv(dev); 450 451 /* 452 * Once the card has the firmware loaded and has acquired 453 * the nodeid, if it is reset it will lose it all. 454 */ 455 cops_reset(dev,1); /* Need to reset card before load firmware. */ 456 cops_load(dev); /* Load the firmware. */ 457 458 /* 459 * If atalkd already gave us a nodeid we will use that 460 * one again, else we wait for atalkd to give us a nodeid 461 * in cops_ioctl. This may cause a problem if someone steals 462 * our nodeid while we are resetting. 463 */ 464 if(lp->nodeid == 1) 465 cops_nodeid(dev,lp->node_acquire); 466 467 return 0; 468 } 469 470 static void tangent_wait_reset(int ioaddr) 471 { 472 int timeout=0; 473 474 while(timeout++ < 5 && (inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 475 mdelay(1); /* Wait 1 second */ 476 } 477 478 /* 479 * Reset the LocalTalk board. 480 */ 481 static void cops_reset(struct net_device *dev, int sleep) 482 { 483 struct cops_local *lp = netdev_priv(dev); 484 int ioaddr=dev->base_addr; 485 486 if(lp->board==TANGENT) 487 { 488 inb(ioaddr); /* Clear request latch. */ 489 outb(0,ioaddr); /* Clear the TANG_TX_READY flop. */ 490 outb(0, ioaddr+TANG_RESET); /* Reset the adapter. */ 491 492 tangent_wait_reset(ioaddr); 493 outb(0, ioaddr+TANG_CLEAR_INT); 494 } 495 if(lp->board==DAYNA) 496 { 497 outb(0, ioaddr+DAYNA_RESET); /* Assert the reset port */ 498 inb(ioaddr+DAYNA_RESET); /* Clear the reset */ 499 if (sleep) 500 msleep(333); 501 else 502 mdelay(333); 503 } 504 505 netif_wake_queue(dev); 506 } 507 508 static void cops_load (struct net_device *dev) 509 { 510 struct ifreq ifr; 511 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru; 512 struct cops_local *lp = netdev_priv(dev); 513 int ioaddr=dev->base_addr; 514 int length, i = 0; 515 516 strcpy(ifr.ifr_name,"lt0"); 517 518 /* Get card's firmware code and do some checks on it. */ 519 #ifdef CONFIG_COPS_DAYNA 520 if(lp->board==DAYNA) 521 { 522 ltf->length=sizeof(ffdrv_code); 523 ltf->data=ffdrv_code; 524 } 525 else 526 #endif 527 #ifdef CONFIG_COPS_TANGENT 528 if(lp->board==TANGENT) 529 { 530 ltf->length=sizeof(ltdrv_code); 531 ltf->data=ltdrv_code; 532 } 533 else 534 #endif 535 { 536 printk(KERN_INFO "%s; unsupported board type.\n", dev->name); 537 return; 538 } 539 540 /* Check to make sure firmware is correct length. */ 541 if(lp->board==DAYNA && ltf->length!=5983) 542 { 543 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name); 544 return; 545 } 546 if(lp->board==TANGENT && ltf->length!=2501) 547 { 548 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name); 549 return; 550 } 551 552 if(lp->board==DAYNA) 553 { 554 /* 555 * We must wait for a status response 556 * with the DAYNA board. 557 */ 558 while(++i<65536) 559 { 560 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1) 561 break; 562 } 563 564 if(i==65536) 565 return; 566 } 567 568 /* 569 * Upload the firmware and kick. Byte-by-byte works nicely here. 570 */ 571 i=0; 572 length = ltf->length; 573 while(length--) 574 { 575 outb(ltf->data[i], ioaddr); 576 i++; 577 } 578 579 if(cops_debug > 1) 580 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n", 581 dev->name, i, ltf->length); 582 583 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */ 584 outb(1, ioaddr+DAYNA_INT_CARD); 585 else /* Tell Tang to run the firmware code. */ 586 inb(ioaddr); 587 588 if(lp->board==TANGENT) 589 { 590 tangent_wait_reset(ioaddr); 591 inb(ioaddr); /* Clear initial ready signal. */ 592 } 593 } 594 595 /* 596 * Get the LocalTalk Nodeid from the card. We can suggest 597 * any nodeid 1-254. The card will try and get that exact 598 * address else we can specify 0 as the nodeid and the card 599 * will autoprobe for a nodeid. 600 */ 601 static int cops_nodeid (struct net_device *dev, int nodeid) 602 { 603 struct cops_local *lp = netdev_priv(dev); 604 int ioaddr = dev->base_addr; 605 606 if(lp->board == DAYNA) 607 { 608 /* Empty any pending adapter responses. */ 609 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 610 { 611 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */ 612 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 613 cops_rx(dev); /* Kick any packets waiting. */ 614 schedule(); 615 } 616 617 outb(2, ioaddr); /* Output command packet length as 2. */ 618 outb(0, ioaddr); 619 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */ 620 outb(nodeid, ioaddr); /* Suggest node address. */ 621 } 622 623 if(lp->board == TANGENT) 624 { 625 /* Empty any pending adapter responses. */ 626 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 627 { 628 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */ 629 cops_rx(dev); /* Kick out packets waiting. */ 630 schedule(); 631 } 632 633 /* Not sure what Tangent does if nodeid picked is used. */ 634 if(nodeid == 0) /* Seed. */ 635 nodeid = jiffies&0xFF; /* Get a random try */ 636 outb(2, ioaddr); /* Command length LSB */ 637 outb(0, ioaddr); /* Command length MSB */ 638 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */ 639 outb(nodeid, ioaddr); /* LAP address hint. */ 640 outb(0xFF, ioaddr); /* Int. level to use */ 641 } 642 643 lp->node_acquire=0; /* Set nodeid holder to 0. */ 644 while(lp->node_acquire==0) /* Get *True* nodeid finally. */ 645 { 646 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */ 647 648 if(lp->board == DAYNA) 649 { 650 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 651 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 652 } 653 if(lp->board == TANGENT) 654 { 655 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 656 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 657 } 658 schedule(); 659 } 660 661 if(cops_debug > 1) 662 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n", 663 dev->name, lp->node_acquire); 664 665 lp->nodeid=1; /* Set got nodeid to 1. */ 666 667 return 0; 668 } 669 670 /* 671 * Poll the Tangent type cards to see if we have work. 672 */ 673 674 static void cops_poll(unsigned long ltdev) 675 { 676 int ioaddr, status; 677 int boguscount = 0; 678 679 struct net_device *dev = (struct net_device *)ltdev; 680 681 del_timer(&cops_timer); 682 683 if(dev == NULL) 684 return; /* We've been downed */ 685 686 ioaddr = dev->base_addr; 687 do { 688 status=inb(ioaddr+TANG_CARD_STATUS); 689 if(status & TANG_RX_READY) 690 cops_rx(dev); 691 if(status & TANG_TX_READY) 692 netif_wake_queue(dev); 693 status = inb(ioaddr+TANG_CARD_STATUS); 694 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 695 696 /* poll 20 times per second */ 697 cops_timer.expires = jiffies + HZ/20; 698 add_timer(&cops_timer); 699 } 700 701 /* 702 * The typical workload of the driver: 703 * Handle the network interface interrupts. 704 */ 705 static irqreturn_t cops_interrupt(int irq, void *dev_id) 706 { 707 struct net_device *dev = dev_id; 708 struct cops_local *lp; 709 int ioaddr, status; 710 int boguscount = 0; 711 712 ioaddr = dev->base_addr; 713 lp = netdev_priv(dev); 714 715 if(lp->board==DAYNA) 716 { 717 do { 718 outb(0, ioaddr + COPS_CLEAR_INT); 719 status=inb(ioaddr+DAYNA_CARD_STATUS); 720 if((status&0x03)==DAYNA_RX_REQUEST) 721 cops_rx(dev); 722 netif_wake_queue(dev); 723 } while(++boguscount < 20); 724 } 725 else 726 { 727 do { 728 status=inb(ioaddr+TANG_CARD_STATUS); 729 if(status & TANG_RX_READY) 730 cops_rx(dev); 731 if(status & TANG_TX_READY) 732 netif_wake_queue(dev); 733 status=inb(ioaddr+TANG_CARD_STATUS); 734 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 735 } 736 737 return IRQ_HANDLED; 738 } 739 740 /* 741 * We have a good packet(s), get it/them out of the buffers. 742 */ 743 static void cops_rx(struct net_device *dev) 744 { 745 int pkt_len = 0; 746 int rsp_type = 0; 747 struct sk_buff *skb = NULL; 748 struct cops_local *lp = netdev_priv(dev); 749 int ioaddr = dev->base_addr; 750 int boguscount = 0; 751 unsigned long flags; 752 753 754 spin_lock_irqsave(&lp->lock, flags); 755 756 if(lp->board==DAYNA) 757 { 758 outb(0, ioaddr); /* Send out Zero length. */ 759 outb(0, ioaddr); 760 outb(DATA_READ, ioaddr); /* Send read command out. */ 761 762 /* Wait for DMA to turn around. */ 763 while(++boguscount<1000000) 764 { 765 barrier(); 766 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY) 767 break; 768 } 769 770 if(boguscount==1000000) 771 { 772 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name); 773 spin_unlock_irqrestore(&lp->lock, flags); 774 return; 775 } 776 } 777 778 /* Get response length. */ 779 if(lp->board==DAYNA) 780 pkt_len = inb(ioaddr) & 0xFF; 781 else 782 pkt_len = inb(ioaddr) & 0x00FF; 783 pkt_len |= (inb(ioaddr) << 8); 784 /* Input IO code. */ 785 rsp_type=inb(ioaddr); 786 787 /* Malloc up new buffer. */ 788 skb = dev_alloc_skb(pkt_len); 789 if(skb == NULL) 790 { 791 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", 792 dev->name); 793 dev->stats.rx_dropped++; 794 while(pkt_len--) /* Discard packet */ 795 inb(ioaddr); 796 spin_unlock_irqrestore(&lp->lock, flags); 797 return; 798 } 799 skb->dev = dev; 800 skb_put(skb, pkt_len); 801 skb->protocol = htons(ETH_P_LOCALTALK); 802 803 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */ 804 805 if(lp->board==DAYNA) 806 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */ 807 808 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 809 810 /* Check for bad response length */ 811 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE) 812 { 813 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n", 814 dev->name, pkt_len); 815 dev->stats.tx_errors++; 816 dev_kfree_skb_any(skb); 817 return; 818 } 819 820 /* Set nodeid and then get out. */ 821 if(rsp_type == LAP_INIT_RSP) 822 { /* Nodeid taken from received packet. */ 823 lp->node_acquire = skb->data[0]; 824 dev_kfree_skb_any(skb); 825 return; 826 } 827 828 /* One last check to make sure we have a good packet. */ 829 if(rsp_type != LAP_RESPONSE) 830 { 831 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type); 832 dev->stats.tx_errors++; 833 dev_kfree_skb_any(skb); 834 return; 835 } 836 837 skb_reset_mac_header(skb); /* Point to entire packet. */ 838 skb_pull(skb,3); 839 skb_reset_transport_header(skb); /* Point to data (Skip header). */ 840 841 /* Update the counters. */ 842 dev->stats.rx_packets++; 843 dev->stats.rx_bytes += skb->len; 844 845 /* Send packet to a higher place. */ 846 netif_rx(skb); 847 } 848 849 static void cops_timeout(struct net_device *dev) 850 { 851 struct cops_local *lp = netdev_priv(dev); 852 int ioaddr = dev->base_addr; 853 854 dev->stats.tx_errors++; 855 if(lp->board==TANGENT) 856 { 857 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 858 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name); 859 } 860 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name); 861 cops_jumpstart(dev); /* Restart the card. */ 862 netif_trans_update(dev); /* prevent tx timeout */ 863 netif_wake_queue(dev); 864 } 865 866 867 /* 868 * Make the card transmit a LocalTalk packet. 869 */ 870 871 static netdev_tx_t cops_send_packet(struct sk_buff *skb, 872 struct net_device *dev) 873 { 874 struct cops_local *lp = netdev_priv(dev); 875 int ioaddr = dev->base_addr; 876 unsigned long flags; 877 878 /* 879 * Block a timer-based transmit from overlapping. 880 */ 881 882 netif_stop_queue(dev); 883 884 spin_lock_irqsave(&lp->lock, flags); 885 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */ 886 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 887 cpu_relax(); 888 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */ 889 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 890 cpu_relax(); 891 892 /* Output IO length. */ 893 outb(skb->len, ioaddr); 894 if(lp->board == DAYNA) 895 outb(skb->len >> 8, ioaddr); 896 else 897 outb((skb->len >> 8)&0x0FF, ioaddr); 898 899 /* Output IO code. */ 900 outb(LAP_WRITE, ioaddr); 901 902 if(lp->board == DAYNA) /* Check the transmit buffer again. */ 903 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0); 904 905 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */ 906 907 if(lp->board==DAYNA) /* Dayna requires you kick the card */ 908 outb(1, ioaddr+DAYNA_INT_CARD); 909 910 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 911 912 /* Done sending packet, update counters and cleanup. */ 913 dev->stats.tx_packets++; 914 dev->stats.tx_bytes += skb->len; 915 dev_kfree_skb (skb); 916 return NETDEV_TX_OK; 917 } 918 919 /* 920 * Dummy function to keep the Appletalk layer happy. 921 */ 922 923 static void set_multicast_list(struct net_device *dev) 924 { 925 if(cops_debug >= 3) 926 printk("%s: set_multicast_list executed\n", dev->name); 927 } 928 929 /* 930 * System ioctls for the COPS LocalTalk card. 931 */ 932 933 static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 934 { 935 struct cops_local *lp = netdev_priv(dev); 936 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr; 937 struct atalk_addr *aa = &lp->node_addr; 938 939 switch(cmd) 940 { 941 case SIOCSIFADDR: 942 /* Get and set the nodeid and network # atalkd wants. */ 943 cops_nodeid(dev, sa->sat_addr.s_node); 944 aa->s_net = sa->sat_addr.s_net; 945 aa->s_node = lp->node_acquire; 946 947 /* Set broardcast address. */ 948 dev->broadcast[0] = 0xFF; 949 950 /* Set hardware address. */ 951 dev->dev_addr[0] = aa->s_node; 952 dev->addr_len = 1; 953 return 0; 954 955 case SIOCGIFADDR: 956 sa->sat_addr.s_net = aa->s_net; 957 sa->sat_addr.s_node = aa->s_node; 958 return 0; 959 960 default: 961 return -EOPNOTSUPP; 962 } 963 } 964 965 /* 966 * The inverse routine to cops_open(). 967 */ 968 969 static int cops_close(struct net_device *dev) 970 { 971 struct cops_local *lp = netdev_priv(dev); 972 973 /* If we were running polled, yank the timer. 974 */ 975 if(lp->board==TANGENT && dev->irq==0) 976 del_timer(&cops_timer); 977 978 netif_stop_queue(dev); 979 return 0; 980 } 981 982 983 #ifdef MODULE 984 static struct net_device *cops_dev; 985 986 MODULE_LICENSE("GPL"); 987 module_param_hw(io, int, ioport, 0); 988 module_param_hw(irq, int, irq, 0); 989 module_param_hw(board_type, int, other, 0); 990 991 static int __init cops_module_init(void) 992 { 993 if (io == 0) 994 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", 995 cardname); 996 cops_dev = cops_probe(-1); 997 return PTR_ERR_OR_ZERO(cops_dev); 998 } 999 1000 static void __exit cops_module_exit(void) 1001 { 1002 unregister_netdev(cops_dev); 1003 cleanup_card(cops_dev); 1004 free_netdev(cops_dev); 1005 } 1006 module_init(cops_module_init); 1007 module_exit(cops_module_exit); 1008 #endif /* MODULE */ 1009