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 static struct net_device *cops_timer_dev; 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 int board; /* Holds what board type is. */ 174 int nodeid; /* Set to 1 once have nodeid. */ 175 unsigned char node_acquire; /* Node ID when acquired. */ 176 struct atalk_addr node_addr; /* Full node address */ 177 spinlock_t lock; /* RX/TX lock */ 178 }; 179 180 /* Index to functions, as function prototypes. */ 181 static int cops_probe1 (struct net_device *dev, int ioaddr); 182 static int cops_irq (int ioaddr, int board); 183 184 static int cops_open (struct net_device *dev); 185 static int cops_jumpstart (struct net_device *dev); 186 static void cops_reset (struct net_device *dev, int sleep); 187 static void cops_load (struct net_device *dev); 188 static int cops_nodeid (struct net_device *dev, int nodeid); 189 190 static irqreturn_t cops_interrupt (int irq, void *dev_id); 191 static void cops_poll(struct timer_list *t); 192 static void cops_timeout(struct net_device *dev, unsigned int txqueue); 193 static void cops_rx (struct net_device *dev); 194 static netdev_tx_t cops_send_packet (struct sk_buff *skb, 195 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); 199 200 static void cleanup_card(struct net_device *dev) 201 { 202 if (dev->irq) 203 free_irq(dev->irq, dev); 204 release_region(dev->base_addr, COPS_IO_EXTENT); 205 } 206 207 /* 208 * Check for a network adaptor of this type, and return '0' iff one exists. 209 * If dev->base_addr == 0, probe all likely locations. 210 * If dev->base_addr in [1..0x1ff], always return failure. 211 * otherwise go with what we pass in. 212 */ 213 struct net_device * __init cops_probe(int unit) 214 { 215 struct net_device *dev; 216 unsigned *port; 217 int base_addr; 218 int err = 0; 219 220 dev = alloc_ltalkdev(sizeof(struct cops_local)); 221 if (!dev) 222 return ERR_PTR(-ENOMEM); 223 224 if (unit >= 0) { 225 sprintf(dev->name, "lt%d", unit); 226 netdev_boot_setup_check(dev); 227 irq = dev->irq; 228 base_addr = dev->base_addr; 229 } else { 230 base_addr = dev->base_addr = io; 231 } 232 233 if (base_addr > 0x1ff) { /* Check a single specified location. */ 234 err = cops_probe1(dev, base_addr); 235 } else if (base_addr != 0) { /* Don't probe at all. */ 236 err = -ENXIO; 237 } else { 238 /* FIXME Does this really work for cards which generate irq? 239 * It's definitely N.G. for polled Tangent. sh 240 * Dayna cards don't autoprobe well at all, but if your card is 241 * at IRQ 5 & IO 0x240 we find it every time. ;) JS 242 */ 243 for (port = ports; *port && cops_probe1(dev, *port) < 0; port++) 244 ; 245 if (!*port) 246 err = -ENODEV; 247 } 248 if (err) 249 goto out; 250 err = register_netdev(dev); 251 if (err) 252 goto out1; 253 return dev; 254 out1: 255 cleanup_card(dev); 256 out: 257 free_netdev(dev); 258 return ERR_PTR(err); 259 } 260 261 static const struct net_device_ops cops_netdev_ops = { 262 .ndo_open = cops_open, 263 .ndo_stop = cops_close, 264 .ndo_start_xmit = cops_send_packet, 265 .ndo_tx_timeout = cops_timeout, 266 .ndo_do_ioctl = cops_ioctl, 267 .ndo_set_rx_mode = set_multicast_list, 268 }; 269 270 /* 271 * This is the real probe routine. Linux has a history of friendly device 272 * probes on the ISA bus. A good device probes avoids doing writes, and 273 * verifies that the correct device exists and functions. 274 */ 275 static int __init cops_probe1(struct net_device *dev, int ioaddr) 276 { 277 struct cops_local *lp; 278 static unsigned version_printed; 279 int board = board_type; 280 int retval; 281 282 if(cops_debug && version_printed++ == 0) 283 printk("%s", version); 284 285 /* Grab the region so no one else tries to probe our ioports. */ 286 if (!request_region(ioaddr, COPS_IO_EXTENT, dev->name)) 287 return -EBUSY; 288 289 /* 290 * Since this board has jumpered interrupts, allocate the interrupt 291 * vector now. There is no point in waiting since no other device 292 * can use the interrupt, and this marks the irq as busy. Jumpered 293 * interrupts are typically not reported by the boards, and we must 294 * used AutoIRQ to find them. 295 */ 296 dev->irq = irq; 297 switch (dev->irq) 298 { 299 case 0: 300 /* COPS AutoIRQ routine */ 301 dev->irq = cops_irq(ioaddr, board); 302 if (dev->irq) 303 break; 304 /* fall through - Once no IRQ found on this port. */ 305 case 1: 306 retval = -EINVAL; 307 goto err_out; 308 309 /* Fixup for users that don't know that IRQ 2 is really 310 * IRQ 9, or don't know which one to set. 311 */ 312 case 2: 313 dev->irq = 9; 314 break; 315 316 /* Polled operation requested. Although irq of zero passed as 317 * a parameter tells the init routines to probe, we'll 318 * overload it to denote polled operation at runtime. 319 */ 320 case 0xff: 321 dev->irq = 0; 322 break; 323 324 default: 325 break; 326 } 327 328 /* Reserve any actual interrupt. */ 329 if (dev->irq) { 330 retval = request_irq(dev->irq, cops_interrupt, 0, dev->name, dev); 331 if (retval) 332 goto err_out; 333 } 334 335 dev->base_addr = ioaddr; 336 337 lp = netdev_priv(dev); 338 spin_lock_init(&lp->lock); 339 340 /* Copy local board variable to lp struct. */ 341 lp->board = board; 342 343 dev->netdev_ops = &cops_netdev_ops; 344 dev->watchdog_timeo = HZ * 2; 345 346 347 /* 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 cops_timer_dev = dev; 429 timer_setup(&cops_timer, cops_poll, 0); 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 msleep(333); 503 else 504 mdelay(333); 505 } 506 507 netif_wake_queue(dev); 508 } 509 510 static void cops_load (struct net_device *dev) 511 { 512 struct ifreq ifr; 513 struct ltfirmware *ltf= (struct ltfirmware *)&ifr.ifr_ifru; 514 struct cops_local *lp = netdev_priv(dev); 515 int ioaddr=dev->base_addr; 516 int length, i = 0; 517 518 strcpy(ifr.ifr_name,"lt0"); 519 520 /* Get card's firmware code and do some checks on it. */ 521 #ifdef CONFIG_COPS_DAYNA 522 if(lp->board==DAYNA) 523 { 524 ltf->length=sizeof(ffdrv_code); 525 ltf->data=ffdrv_code; 526 } 527 else 528 #endif 529 #ifdef CONFIG_COPS_TANGENT 530 if(lp->board==TANGENT) 531 { 532 ltf->length=sizeof(ltdrv_code); 533 ltf->data=ltdrv_code; 534 } 535 else 536 #endif 537 { 538 printk(KERN_INFO "%s; unsupported board type.\n", dev->name); 539 return; 540 } 541 542 /* Check to make sure firmware is correct length. */ 543 if(lp->board==DAYNA && ltf->length!=5983) 544 { 545 printk(KERN_WARNING "%s: Firmware is not length of FFDRV.BIN.\n", dev->name); 546 return; 547 } 548 if(lp->board==TANGENT && ltf->length!=2501) 549 { 550 printk(KERN_WARNING "%s: Firmware is not length of DRVCODE.BIN.\n", dev->name); 551 return; 552 } 553 554 if(lp->board==DAYNA) 555 { 556 /* 557 * We must wait for a status response 558 * with the DAYNA board. 559 */ 560 while(++i<65536) 561 { 562 if((inb(ioaddr+DAYNA_CARD_STATUS)&3)==1) 563 break; 564 } 565 566 if(i==65536) 567 return; 568 } 569 570 /* 571 * Upload the firmware and kick. Byte-by-byte works nicely here. 572 */ 573 i=0; 574 length = ltf->length; 575 while(length--) 576 { 577 outb(ltf->data[i], ioaddr); 578 i++; 579 } 580 581 if(cops_debug > 1) 582 printk("%s: Uploaded firmware - %d bytes of %d bytes.\n", 583 dev->name, i, ltf->length); 584 585 if(lp->board==DAYNA) /* Tell Dayna to run the firmware code. */ 586 outb(1, ioaddr+DAYNA_INT_CARD); 587 else /* Tell Tang to run the firmware code. */ 588 inb(ioaddr); 589 590 if(lp->board==TANGENT) 591 { 592 tangent_wait_reset(ioaddr); 593 inb(ioaddr); /* Clear initial ready signal. */ 594 } 595 } 596 597 /* 598 * Get the LocalTalk Nodeid from the card. We can suggest 599 * any nodeid 1-254. The card will try and get that exact 600 * address else we can specify 0 as the nodeid and the card 601 * will autoprobe for a nodeid. 602 */ 603 static int cops_nodeid (struct net_device *dev, int nodeid) 604 { 605 struct cops_local *lp = netdev_priv(dev); 606 int ioaddr = dev->base_addr; 607 608 if(lp->board == DAYNA) 609 { 610 /* Empty any pending adapter responses. */ 611 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 612 { 613 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupts. */ 614 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 615 cops_rx(dev); /* Kick any packets waiting. */ 616 schedule(); 617 } 618 619 outb(2, ioaddr); /* Output command packet length as 2. */ 620 outb(0, ioaddr); 621 outb(LAP_INIT, ioaddr); /* Send LAP_INIT command byte. */ 622 outb(nodeid, ioaddr); /* Suggest node address. */ 623 } 624 625 if(lp->board == TANGENT) 626 { 627 /* Empty any pending adapter responses. */ 628 while(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 629 { 630 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear interrupt. */ 631 cops_rx(dev); /* Kick out packets waiting. */ 632 schedule(); 633 } 634 635 /* Not sure what Tangent does if nodeid picked is used. */ 636 if(nodeid == 0) /* Seed. */ 637 nodeid = jiffies&0xFF; /* Get a random try */ 638 outb(2, ioaddr); /* Command length LSB */ 639 outb(0, ioaddr); /* Command length MSB */ 640 outb(LAP_INIT, ioaddr); /* Send LAP_INIT byte */ 641 outb(nodeid, ioaddr); /* LAP address hint. */ 642 outb(0xFF, ioaddr); /* Int. level to use */ 643 } 644 645 lp->node_acquire=0; /* Set nodeid holder to 0. */ 646 while(lp->node_acquire==0) /* Get *True* nodeid finally. */ 647 { 648 outb(0, ioaddr+COPS_CLEAR_INT); /* Clear any interrupt. */ 649 650 if(lp->board == DAYNA) 651 { 652 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_REQUEST) 653 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 654 } 655 if(lp->board == TANGENT) 656 { 657 if(inb(ioaddr+TANG_CARD_STATUS)&TANG_RX_READY) 658 cops_rx(dev); /* Grab the nodeid put in lp->node_acquire. */ 659 } 660 schedule(); 661 } 662 663 if(cops_debug > 1) 664 printk(KERN_DEBUG "%s: Node ID %d has been acquired.\n", 665 dev->name, lp->node_acquire); 666 667 lp->nodeid=1; /* Set got nodeid to 1. */ 668 669 return 0; 670 } 671 672 /* 673 * Poll the Tangent type cards to see if we have work. 674 */ 675 676 static void cops_poll(struct timer_list *unused) 677 { 678 int ioaddr, status; 679 int boguscount = 0; 680 struct net_device *dev = cops_timer_dev; 681 682 del_timer(&cops_timer); 683 684 if(dev == NULL) 685 return; /* We've been downed */ 686 687 ioaddr = dev->base_addr; 688 do { 689 status=inb(ioaddr+TANG_CARD_STATUS); 690 if(status & TANG_RX_READY) 691 cops_rx(dev); 692 if(status & TANG_TX_READY) 693 netif_wake_queue(dev); 694 status = inb(ioaddr+TANG_CARD_STATUS); 695 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 696 697 /* poll 20 times per second */ 698 cops_timer.expires = jiffies + HZ/20; 699 add_timer(&cops_timer); 700 } 701 702 /* 703 * The typical workload of the driver: 704 * Handle the network interface interrupts. 705 */ 706 static irqreturn_t cops_interrupt(int irq, void *dev_id) 707 { 708 struct net_device *dev = dev_id; 709 struct cops_local *lp; 710 int ioaddr, status; 711 int boguscount = 0; 712 713 ioaddr = dev->base_addr; 714 lp = netdev_priv(dev); 715 716 if(lp->board==DAYNA) 717 { 718 do { 719 outb(0, ioaddr + COPS_CLEAR_INT); 720 status=inb(ioaddr+DAYNA_CARD_STATUS); 721 if((status&0x03)==DAYNA_RX_REQUEST) 722 cops_rx(dev); 723 netif_wake_queue(dev); 724 } while(++boguscount < 20); 725 } 726 else 727 { 728 do { 729 status=inb(ioaddr+TANG_CARD_STATUS); 730 if(status & TANG_RX_READY) 731 cops_rx(dev); 732 if(status & TANG_TX_READY) 733 netif_wake_queue(dev); 734 status=inb(ioaddr+TANG_CARD_STATUS); 735 } while((++boguscount < 20) && (status&(TANG_RX_READY|TANG_TX_READY))); 736 } 737 738 return IRQ_HANDLED; 739 } 740 741 /* 742 * We have a good packet(s), get it/them out of the buffers. 743 */ 744 static void cops_rx(struct net_device *dev) 745 { 746 int pkt_len = 0; 747 int rsp_type = 0; 748 struct sk_buff *skb = NULL; 749 struct cops_local *lp = netdev_priv(dev); 750 int ioaddr = dev->base_addr; 751 int boguscount = 0; 752 unsigned long flags; 753 754 755 spin_lock_irqsave(&lp->lock, flags); 756 757 if(lp->board==DAYNA) 758 { 759 outb(0, ioaddr); /* Send out Zero length. */ 760 outb(0, ioaddr); 761 outb(DATA_READ, ioaddr); /* Send read command out. */ 762 763 /* Wait for DMA to turn around. */ 764 while(++boguscount<1000000) 765 { 766 barrier(); 767 if((inb(ioaddr+DAYNA_CARD_STATUS)&0x03)==DAYNA_RX_READY) 768 break; 769 } 770 771 if(boguscount==1000000) 772 { 773 printk(KERN_WARNING "%s: DMA timed out.\n",dev->name); 774 spin_unlock_irqrestore(&lp->lock, flags); 775 return; 776 } 777 } 778 779 /* Get response length. */ 780 pkt_len = inb(ioaddr); 781 pkt_len |= (inb(ioaddr) << 8); 782 /* Input IO code. */ 783 rsp_type=inb(ioaddr); 784 785 /* Malloc up new buffer. */ 786 skb = dev_alloc_skb(pkt_len); 787 if(skb == NULL) 788 { 789 printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", 790 dev->name); 791 dev->stats.rx_dropped++; 792 while(pkt_len--) /* Discard packet */ 793 inb(ioaddr); 794 spin_unlock_irqrestore(&lp->lock, flags); 795 return; 796 } 797 skb->dev = dev; 798 skb_put(skb, pkt_len); 799 skb->protocol = htons(ETH_P_LOCALTALK); 800 801 insb(ioaddr, skb->data, pkt_len); /* Eat the Data */ 802 803 if(lp->board==DAYNA) 804 outb(1, ioaddr+DAYNA_INT_CARD); /* Interrupt the card */ 805 806 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 807 808 /* Check for bad response length */ 809 if(pkt_len < 0 || pkt_len > MAX_LLAP_SIZE) 810 { 811 printk(KERN_WARNING "%s: Bad packet length of %d bytes.\n", 812 dev->name, pkt_len); 813 dev->stats.tx_errors++; 814 dev_kfree_skb_any(skb); 815 return; 816 } 817 818 /* Set nodeid and then get out. */ 819 if(rsp_type == LAP_INIT_RSP) 820 { /* Nodeid taken from received packet. */ 821 lp->node_acquire = skb->data[0]; 822 dev_kfree_skb_any(skb); 823 return; 824 } 825 826 /* One last check to make sure we have a good packet. */ 827 if(rsp_type != LAP_RESPONSE) 828 { 829 printk(KERN_WARNING "%s: Bad packet type %d.\n", dev->name, rsp_type); 830 dev->stats.tx_errors++; 831 dev_kfree_skb_any(skb); 832 return; 833 } 834 835 skb_reset_mac_header(skb); /* Point to entire packet. */ 836 skb_pull(skb,3); 837 skb_reset_transport_header(skb); /* Point to data (Skip header). */ 838 839 /* Update the counters. */ 840 dev->stats.rx_packets++; 841 dev->stats.rx_bytes += skb->len; 842 843 /* Send packet to a higher place. */ 844 netif_rx(skb); 845 } 846 847 static void cops_timeout(struct net_device *dev, unsigned int txqueue) 848 { 849 struct cops_local *lp = netdev_priv(dev); 850 int ioaddr = dev->base_addr; 851 852 dev->stats.tx_errors++; 853 if(lp->board==TANGENT) 854 { 855 if((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 856 printk(KERN_WARNING "%s: No TX complete interrupt.\n", dev->name); 857 } 858 printk(KERN_WARNING "%s: Transmit timed out.\n", dev->name); 859 cops_jumpstart(dev); /* Restart the card. */ 860 netif_trans_update(dev); /* prevent tx timeout */ 861 netif_wake_queue(dev); 862 } 863 864 865 /* 866 * Make the card transmit a LocalTalk packet. 867 */ 868 869 static netdev_tx_t cops_send_packet(struct sk_buff *skb, 870 struct net_device *dev) 871 { 872 struct cops_local *lp = netdev_priv(dev); 873 int ioaddr = dev->base_addr; 874 unsigned long flags; 875 876 /* 877 * Block a timer-based transmit from overlapping. 878 */ 879 880 netif_stop_queue(dev); 881 882 spin_lock_irqsave(&lp->lock, flags); 883 if(lp->board == DAYNA) /* Wait for adapter transmit buffer. */ 884 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0) 885 cpu_relax(); 886 if(lp->board == TANGENT) /* Wait for adapter transmit buffer. */ 887 while((inb(ioaddr+TANG_CARD_STATUS)&TANG_TX_READY)==0) 888 cpu_relax(); 889 890 /* Output IO length. */ 891 outb(skb->len, ioaddr); 892 outb(skb->len >> 8, ioaddr); 893 894 /* Output IO code. */ 895 outb(LAP_WRITE, ioaddr); 896 897 if(lp->board == DAYNA) /* Check the transmit buffer again. */ 898 while((inb(ioaddr+DAYNA_CARD_STATUS)&DAYNA_TX_READY)==0); 899 900 outsb(ioaddr, skb->data, skb->len); /* Send out the data. */ 901 902 if(lp->board==DAYNA) /* Dayna requires you kick the card */ 903 outb(1, ioaddr+DAYNA_INT_CARD); 904 905 spin_unlock_irqrestore(&lp->lock, flags); /* Restore interrupts. */ 906 907 /* Done sending packet, update counters and cleanup. */ 908 dev->stats.tx_packets++; 909 dev->stats.tx_bytes += skb->len; 910 dev_kfree_skb (skb); 911 return NETDEV_TX_OK; 912 } 913 914 /* 915 * Dummy function to keep the Appletalk layer happy. 916 */ 917 918 static void set_multicast_list(struct net_device *dev) 919 { 920 if(cops_debug >= 3) 921 printk("%s: set_multicast_list executed\n", dev->name); 922 } 923 924 /* 925 * System ioctls for the COPS LocalTalk card. 926 */ 927 928 static int cops_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) 929 { 930 struct cops_local *lp = netdev_priv(dev); 931 struct sockaddr_at *sa = (struct sockaddr_at *)&ifr->ifr_addr; 932 struct atalk_addr *aa = &lp->node_addr; 933 934 switch(cmd) 935 { 936 case SIOCSIFADDR: 937 /* Get and set the nodeid and network # atalkd wants. */ 938 cops_nodeid(dev, sa->sat_addr.s_node); 939 aa->s_net = sa->sat_addr.s_net; 940 aa->s_node = lp->node_acquire; 941 942 /* Set broardcast address. */ 943 dev->broadcast[0] = 0xFF; 944 945 /* Set hardware address. */ 946 dev->dev_addr[0] = aa->s_node; 947 dev->addr_len = 1; 948 return 0; 949 950 case SIOCGIFADDR: 951 sa->sat_addr.s_net = aa->s_net; 952 sa->sat_addr.s_node = aa->s_node; 953 return 0; 954 955 default: 956 return -EOPNOTSUPP; 957 } 958 } 959 960 /* 961 * The inverse routine to cops_open(). 962 */ 963 964 static int cops_close(struct net_device *dev) 965 { 966 struct cops_local *lp = netdev_priv(dev); 967 968 /* If we were running polled, yank the timer. 969 */ 970 if(lp->board==TANGENT && dev->irq==0) 971 del_timer(&cops_timer); 972 973 netif_stop_queue(dev); 974 return 0; 975 } 976 977 978 #ifdef MODULE 979 static struct net_device *cops_dev; 980 981 MODULE_LICENSE("GPL"); 982 module_param_hw(io, int, ioport, 0); 983 module_param_hw(irq, int, irq, 0); 984 module_param_hw(board_type, int, other, 0); 985 986 static int __init cops_module_init(void) 987 { 988 if (io == 0) 989 printk(KERN_WARNING "%s: You shouldn't autoprobe with insmod\n", 990 cardname); 991 cops_dev = cops_probe(-1); 992 return PTR_ERR_OR_ZERO(cops_dev); 993 } 994 995 static void __exit cops_module_exit(void) 996 { 997 unregister_netdev(cops_dev); 998 cleanup_card(cops_dev); 999 free_netdev(cops_dev); 1000 } 1001 module_init(cops_module_init); 1002 module_exit(cops_module_exit); 1003 #endif /* MODULE */ 1004