1/* at1700.c: A network device driver for the Allied Telesis AT1700. 2 3 Written 1993-98 by Donald Becker. 4 5 Copyright 1993 United States Government as represented by the 6 Director, National Security Agency. 7 8 This software may be used and distributed according to the terms 9 of the GNU General Public License, incorporated herein by reference. 10 11 The author may be reached as becker@scyld.com, or C/O 12 Scyld Computing Corporation 13 410 Severn Ave., Suite 210 14 Annapolis MD 21403 15 16 This is a device driver for the Allied Telesis AT1700, and 17 Fujitsu FMV-181/182/181A/182A/183/184/183A/184A, which are 18 straight-forward Fujitsu MB86965 implementations. 19 20 Modification for Fujitsu FMV-18X cards is done by Yutaka Tamiya 21 (tamy@flab.fujitsu.co.jp). 22 23 Sources: 24 The Fujitsu MB86965 datasheet. 25 26 After the initial version of this driver was written Gerry Sawkins of 27 ATI provided their EEPROM configuration code header file. 28 Thanks to NIIBE Yutaka <gniibe@mri.co.jp> for bug fixes. 29 30 MCA bus (AT1720) support by Rene Schmit <rene@bss.lu> 31 32 Bugs: 33 The MB86965 has a design flaw that makes all probes unreliable. Not 34 only is it difficult to detect, it also moves around in I/O space in 35 response to inb()s from other device probes! 36*/ 37 38#include <linux/errno.h> 39#include <linux/netdevice.h> 40#include <linux/etherdevice.h> 41#include <linux/mca-legacy.h> 42#include <linux/module.h> 43#include <linux/kernel.h> 44#include <linux/types.h> 45#include <linux/fcntl.h> 46#include <linux/interrupt.h> 47#include <linux/ioport.h> 48#include <linux/in.h> 49#include <linux/skbuff.h> 50#include <linux/string.h> 51#include <linux/init.h> 52#include <linux/crc32.h> 53#include <linux/bitops.h> 54 55#include <asm/system.h> 56#include <asm/io.h> 57#include <asm/dma.h> 58 59static char version[] __initdata = 60 "at1700.c:v1.16 9/11/06 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n"; 61 62#define DRV_NAME "at1700" 63 64/* Tunable parameters. */ 65 66/* When to switch from the 64-entry multicast filter to Rx-all-multicast. */ 67#define MC_FILTERBREAK 64 68 69/* These unusual address orders are used to verify the CONFIG register. */ 70 71static int fmv18x_probe_list[] __initdata = { 72 0x220, 0x240, 0x260, 0x280, 0x2a0, 0x2c0, 0x300, 0x340, 0 73}; 74 75/* 76 * ISA 77 */ 78 79static unsigned at1700_probe_list[] __initdata = { 80 0x260, 0x280, 0x2a0, 0x240, 0x340, 0x320, 0x380, 0x300, 0 81}; 82 83/* 84 * MCA 85 */ 86#ifdef CONFIG_MCA_LEGACY 87static int at1700_ioaddr_pattern[] __initdata = { 88 0x00, 0x04, 0x01, 0x05, 0x02, 0x06, 0x03, 0x07 89}; 90 91static int at1700_mca_probe_list[] __initdata = { 92 0x400, 0x1400, 0x2400, 0x3400, 0x4400, 0x5400, 0x6400, 0x7400, 0 93}; 94 95static int at1700_irq_pattern[] __initdata = { 96 0x00, 0x00, 0x00, 0x30, 0x70, 0xb0, 0x00, 0x00, 97 0x00, 0xf0, 0x34, 0x74, 0xb4, 0x00, 0x00, 0xf4, 0x00 98}; 99#endif 100 101/* use 0 for production, 1 for verification, >2 for debug */ 102#ifndef NET_DEBUG 103#define NET_DEBUG 1 104#endif 105static unsigned int net_debug = NET_DEBUG; 106 107typedef unsigned char uchar; 108 109/* Information that need to be kept for each board. */ 110struct net_local { 111 spinlock_t lock; 112 unsigned char mc_filter[8]; 113 uint jumpered:1; /* Set iff the board has jumper config. */ 114 uint tx_started:1; /* Packets are on the Tx queue. */ 115 uint tx_queue_ready:1; /* Tx queue is ready to be sent. */ 116 uint rx_started:1; /* Packets are Rxing. */ 117 uchar tx_queue; /* Number of packet on the Tx queue. */ 118 char mca_slot; /* -1 means ISA */ 119 ushort tx_queue_len; /* Current length of the Tx queue. */ 120}; 121 122 123/* Offsets from the base address. */ 124#define STATUS 0 125#define TX_STATUS 0 126#define RX_STATUS 1 127#define TX_INTR 2 /* Bit-mapped interrupt enable registers. */ 128#define RX_INTR 3 129#define TX_MODE 4 130#define RX_MODE 5 131#define CONFIG_0 6 /* Misc. configuration settings. */ 132#define CONFIG_1 7 133/* Run-time register bank 2 definitions. */ 134#define DATAPORT 8 /* Word-wide DMA or programmed-I/O dataport. */ 135#define TX_START 10 136#define COL16CNTL 11 /* Controll Reg for 16 collisions */ 137#define MODE13 13 138#define RX_CTRL 14 139/* Configuration registers only on the '865A/B chips. */ 140#define EEPROM_Ctrl 16 141#define EEPROM_Data 17 142#define CARDSTATUS 16 /* FMV-18x Card Status */ 143#define CARDSTATUS1 17 /* FMV-18x Card Status */ 144#define IOCONFIG 18 /* Either read the jumper, or move the I/O. */ 145#define IOCONFIG1 19 146#define SAPROM 20 /* The station address PROM, if no EEPROM. */ 147#define MODE24 24 148#define RESET 31 /* Write to reset some parts of the chip. */ 149#define AT1700_IO_EXTENT 32 150#define PORT_OFFSET(o) (o) 151 152 153#define TX_TIMEOUT 10 154 155 156/* Index to functions, as function prototypes. */ 157 158static int at1700_probe1(struct net_device *dev, int ioaddr); 159static int read_eeprom(long ioaddr, int location); 160static int net_open(struct net_device *dev); 161static netdev_tx_t net_send_packet(struct sk_buff *skb, 162 struct net_device *dev); 163static irqreturn_t net_interrupt(int irq, void *dev_id); 164static void net_rx(struct net_device *dev); 165static int net_close(struct net_device *dev); 166static void set_rx_mode(struct net_device *dev); 167static void net_tx_timeout (struct net_device *dev); 168 169 170#ifdef CONFIG_MCA_LEGACY 171struct at1720_mca_adapters_struct { 172 char* name; 173 int id; 174}; 175/* rEnE : maybe there are others I don't know off... */ 176 177static struct at1720_mca_adapters_struct at1720_mca_adapters[] __initdata = { 178 { "Allied Telesys AT1720AT", 0x6410 }, 179 { "Allied Telesys AT1720BT", 0x6413 }, 180 { "Allied Telesys AT1720T", 0x6416 }, 181 { NULL, 0 }, 182}; 183#endif 184 185/* Check for a network adaptor of this type, and return '0' iff one exists. 186 If dev->base_addr == 0, probe all likely locations. 187 If dev->base_addr == 1, always return failure. 188 If dev->base_addr == 2, allocate space for the device and return success 189 (detachable devices only). 190 */ 191 192static int io = 0x260; 193 194static int irq; 195 196static void cleanup_card(struct net_device *dev) 197{ 198#ifdef CONFIG_MCA_LEGACY 199 struct net_local *lp = netdev_priv(dev); 200 if (lp->mca_slot >= 0) 201 mca_mark_as_unused(lp->mca_slot); 202#endif 203 free_irq(dev->irq, NULL); 204 release_region(dev->base_addr, AT1700_IO_EXTENT); 205} 206 207struct net_device * __init at1700_probe(int unit) 208{ 209 struct net_device *dev = alloc_etherdev(sizeof(struct net_local)); 210 unsigned *port; 211 int err = 0; 212 213 if (!dev) 214 return ERR_PTR(-ENODEV); 215 216 if (unit >= 0) { 217 sprintf(dev->name, "eth%d", unit); 218 netdev_boot_setup_check(dev); 219 io = dev->base_addr; 220 irq = dev->irq; 221 } else { 222 dev->base_addr = io; 223 dev->irq = irq; 224 } 225 226 if (io > 0x1ff) { /* Check a single specified location. */ 227 err = at1700_probe1(dev, io); 228 } else if (io != 0) { /* Don't probe at all. */ 229 err = -ENXIO; 230 } else { 231 for (port = at1700_probe_list; *port; port++) { 232 if (at1700_probe1(dev, *port) == 0) 233 break; 234 dev->irq = irq; 235 } 236 if (!*port) 237 err = -ENODEV; 238 } 239 if (err) 240 goto out; 241 err = register_netdev(dev); 242 if (err) 243 goto out1; 244 return dev; 245out1: 246 cleanup_card(dev); 247out: 248 free_netdev(dev); 249 return ERR_PTR(err); 250} 251 252static const struct net_device_ops at1700_netdev_ops = { 253 .ndo_open = net_open, 254 .ndo_stop = net_close, 255 .ndo_start_xmit = net_send_packet, 256 .ndo_set_multicast_list = set_rx_mode, 257 .ndo_tx_timeout = net_tx_timeout, 258 .ndo_change_mtu = eth_change_mtu, 259 .ndo_set_mac_address = eth_mac_addr, 260 .ndo_validate_addr = eth_validate_addr, 261}; 262 263/* The Fujitsu datasheet suggests that the NIC be probed for by checking its 264 "signature", the default bit pattern after a reset. This *doesn't* work -- 265 there is no way to reset the bus interface without a complete power-cycle! 266 267 It turns out that ATI came to the same conclusion I did: the only thing 268 that can be done is checking a few bits and then diving right into an 269 EEPROM read. */ 270 271static int __init at1700_probe1(struct net_device *dev, int ioaddr) 272{ 273 char fmv_irqmap[4] = {3, 7, 10, 15}; 274 char fmv_irqmap_pnp[8] = {3, 4, 5, 7, 9, 10, 11, 15}; 275 char at1700_irqmap[8] = {3, 4, 5, 9, 10, 11, 14, 15}; 276 unsigned int i, irq, is_fmv18x = 0, is_at1700 = 0; 277 int slot, ret = -ENODEV; 278 struct net_local *lp = netdev_priv(dev); 279 280 if (!request_region(ioaddr, AT1700_IO_EXTENT, DRV_NAME)) 281 return -EBUSY; 282 283 /* Resetting the chip doesn't reset the ISA interface, so don't bother. 284 That means we have to be careful with the register values we probe 285 for. 286 */ 287#ifdef notdef 288 printk("at1700 probe at %#x, eeprom is %4.4x %4.4x %4.4x ctrl %4.4x.\n", 289 ioaddr, read_eeprom(ioaddr, 4), read_eeprom(ioaddr, 5), 290 read_eeprom(ioaddr, 6), inw(ioaddr + EEPROM_Ctrl)); 291#endif 292 293#ifdef CONFIG_MCA_LEGACY 294 /* rEnE (rene@bss.lu): got this from 3c509 driver source , adapted for AT1720 */ 295 296 /* Based on Erik Nygren's (nygren@mit.edu) 3c529 patch, heavily 297 modified by Chris Beauregard (cpbeaure@csclub.uwaterloo.ca) 298 to support standard MCA probing. */ 299 300 /* redone for multi-card detection by ZP Gu (zpg@castle.net) */ 301 /* now works as a module */ 302 303 if (MCA_bus) { 304 int j; 305 int l_i; 306 u_char pos3, pos4; 307 308 for (j = 0; at1720_mca_adapters[j].name != NULL; j ++) { 309 slot = 0; 310 while (slot != MCA_NOTFOUND) { 311 312 slot = mca_find_unused_adapter( at1720_mca_adapters[j].id, slot ); 313 if (slot == MCA_NOTFOUND) break; 314 315 /* if we get this far, an adapter has been detected and is 316 enabled */ 317 318 pos3 = mca_read_stored_pos( slot, 3 ); 319 pos4 = mca_read_stored_pos( slot, 4 ); 320 321 for (l_i = 0; l_i < 8; l_i++) 322 if (( pos3 & 0x07) == at1700_ioaddr_pattern[l_i]) 323 break; 324 ioaddr = at1700_mca_probe_list[l_i]; 325 326 for (irq = 0; irq < 0x10; irq++) 327 if (((((pos4>>4) & 0x0f) | (pos3 & 0xf0)) & 0xff) == at1700_irq_pattern[irq]) 328 break; 329 330 /* probing for a card at a particular IO/IRQ */ 331 if ((dev->irq && dev->irq != irq) || 332 (dev->base_addr && dev->base_addr != ioaddr)) { 333 slot++; /* probing next slot */ 334 continue; 335 } 336 337 dev->irq = irq; 338 339 /* claim the slot */ 340 mca_set_adapter_name( slot, at1720_mca_adapters[j].name ); 341 mca_mark_as_used(slot); 342 343 goto found; 344 } 345 } 346 /* if we get here, we didn't find an MCA adapter - try ISA */ 347 } 348#endif 349 slot = -1; 350 /* We must check for the EEPROM-config boards first, else accessing 351 IOCONFIG0 will move the board! */ 352 if (at1700_probe_list[inb(ioaddr + IOCONFIG1) & 0x07] == ioaddr && 353 read_eeprom(ioaddr, 4) == 0x0000 && 354 (read_eeprom(ioaddr, 5) & 0xff00) == 0xF400) 355 is_at1700 = 1; 356 else if (inb(ioaddr + SAPROM ) == 0x00 && 357 inb(ioaddr + SAPROM + 1) == 0x00 && 358 inb(ioaddr + SAPROM + 2) == 0x0e) 359 is_fmv18x = 1; 360 else { 361 goto err_out; 362 } 363 364#ifdef CONFIG_MCA_LEGACY 365found: 366#endif 367 368 /* Reset the internal state machines. */ 369 outb(0, ioaddr + RESET); 370 371 if (is_at1700) { 372 irq = at1700_irqmap[(read_eeprom(ioaddr, 12)&0x04) 373 | (read_eeprom(ioaddr, 0)>>14)]; 374 } else { 375 /* Check PnP mode for FMV-183/184/183A/184A. */ 376 /* This PnP routine is very poor. IO and IRQ should be known. */ 377 if (inb(ioaddr + CARDSTATUS1) & 0x20) { 378 irq = dev->irq; 379 for (i = 0; i < 8; i++) { 380 if (irq == fmv_irqmap_pnp[i]) 381 break; 382 } 383 if (i == 8) { 384 goto err_mca; 385 } 386 } else { 387 if (fmv18x_probe_list[inb(ioaddr + IOCONFIG) & 0x07] != ioaddr) 388 goto err_mca; 389 irq = fmv_irqmap[(inb(ioaddr + IOCONFIG)>>6) & 0x03]; 390 } 391 } 392 393 printk("%s: %s found at %#3x, IRQ %d, address ", dev->name, 394 is_at1700 ? "AT1700" : "FMV-18X", ioaddr, irq); 395 396 dev->base_addr = ioaddr; 397 dev->irq = irq; 398 399 if (is_at1700) { 400 for(i = 0; i < 3; i++) { 401 unsigned short eeprom_val = read_eeprom(ioaddr, 4+i); 402 ((unsigned short *)dev->dev_addr)[i] = ntohs(eeprom_val); 403 } 404 } else { 405 for(i = 0; i < 6; i++) { 406 unsigned char val = inb(ioaddr + SAPROM + i); 407 dev->dev_addr[i] = val; 408 } 409 } 410 printk("%pM", dev->dev_addr); 411 412 /* The EEPROM word 12 bit 0x0400 means use regular 100 ohm 10baseT signals, 413 rather than 150 ohm shielded twisted pair compensation. 414 0x0000 == auto-sense the interface 415 0x0800 == use TP interface 416 0x1800 == use coax interface 417 */ 418 { 419 const char *porttype[] = {"auto-sense", "10baseT", "auto-sense", "10base2"}; 420 if (is_at1700) { 421 ushort setup_value = read_eeprom(ioaddr, 12); 422 dev->if_port = setup_value >> 8; 423 } else { 424 ushort setup_value = inb(ioaddr + CARDSTATUS); 425 switch (setup_value & 0x07) { 426 case 0x01: /* 10base5 */ 427 case 0x02: /* 10base2 */ 428 dev->if_port = 0x18; break; 429 case 0x04: /* 10baseT */ 430 dev->if_port = 0x08; break; 431 default: /* auto-sense */ 432 dev->if_port = 0x00; break; 433 } 434 } 435 printk(" %s interface.\n", porttype[(dev->if_port>>3) & 3]); 436 } 437 438 /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit 439 bus access, two 4K Tx queues, and disabled Tx and Rx. */ 440 outb(0xda, ioaddr + CONFIG_0); 441 442 /* Set the station address in bank zero. */ 443 outb(0x00, ioaddr + CONFIG_1); 444 for (i = 0; i < 6; i++) 445 outb(dev->dev_addr[i], ioaddr + PORT_OFFSET(8 + i)); 446 447 /* Switch to bank 1 and set the multicast table to accept none. */ 448 outb(0x04, ioaddr + CONFIG_1); 449 for (i = 0; i < 8; i++) 450 outb(0x00, ioaddr + PORT_OFFSET(8 + i)); 451 452 453 /* Switch to bank 2 */ 454 /* Lock our I/O address, and set manual processing mode for 16 collisions. */ 455 outb(0x08, ioaddr + CONFIG_1); 456 outb(dev->if_port, ioaddr + MODE13); 457 outb(0x00, ioaddr + COL16CNTL); 458 459 if (net_debug) 460 printk(version); 461 462 dev->netdev_ops = &at1700_netdev_ops; 463 dev->watchdog_timeo = TX_TIMEOUT; 464 465 spin_lock_init(&lp->lock); 466 467 lp->jumpered = is_fmv18x; 468 lp->mca_slot = slot; 469 /* Snarf the interrupt vector now. */ 470 ret = request_irq(irq, net_interrupt, 0, DRV_NAME, dev); 471 if (ret) { 472 printk(KERN_ERR "AT1700 at %#3x is unusable due to a " 473 "conflict on IRQ %d.\n", 474 ioaddr, irq); 475 goto err_mca; 476 } 477 478 return 0; 479 480err_mca: 481#ifdef CONFIG_MCA_LEGACY 482 if (slot >= 0) 483 mca_mark_as_unused(slot); 484#endif 485err_out: 486 release_region(ioaddr, AT1700_IO_EXTENT); 487 return ret; 488} 489 490 491/* EEPROM_Ctrl bits. */ 492#define EE_SHIFT_CLK 0x40 /* EEPROM shift clock, in reg. 16. */ 493#define EE_CS 0x20 /* EEPROM chip select, in reg. 16. */ 494#define EE_DATA_WRITE 0x80 /* EEPROM chip data in, in reg. 17. */ 495#define EE_DATA_READ 0x80 /* EEPROM chip data out, in reg. 17. */ 496 497/* The EEPROM commands include the alway-set leading bit. */ 498#define EE_WRITE_CMD (5 << 6) 499#define EE_READ_CMD (6 << 6) 500#define EE_ERASE_CMD (7 << 6) 501 502static int __init read_eeprom(long ioaddr, int location) 503{ 504 int i; 505 unsigned short retval = 0; 506 long ee_addr = ioaddr + EEPROM_Ctrl; 507 long ee_daddr = ioaddr + EEPROM_Data; 508 int read_cmd = location | EE_READ_CMD; 509 510 /* Shift the read command bits out. */ 511 for (i = 9; i >= 0; i--) { 512 short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0; 513 outb(EE_CS, ee_addr); 514 outb(dataval, ee_daddr); 515 outb(EE_CS | EE_SHIFT_CLK, ee_addr); /* EEPROM clock tick. */ 516 } 517 outb(EE_DATA_WRITE, ee_daddr); 518 for (i = 16; i > 0; i--) { 519 outb(EE_CS, ee_addr); 520 outb(EE_CS | EE_SHIFT_CLK, ee_addr); 521 retval = (retval << 1) | ((inb(ee_daddr) & EE_DATA_READ) ? 1 : 0); 522 } 523 524 /* Terminate the EEPROM access. */ 525 outb(EE_CS, ee_addr); 526 outb(EE_SHIFT_CLK, ee_addr); 527 outb(0, ee_addr); 528 return retval; 529} 530 531 532 533static int net_open(struct net_device *dev) 534{ 535 struct net_local *lp = netdev_priv(dev); 536 int ioaddr = dev->base_addr; 537 538 /* Set the configuration register 0 to 32K 100ns. byte-wide memory, 16 bit 539 bus access, and two 4K Tx queues. */ 540 outb(0x5a, ioaddr + CONFIG_0); 541 542 /* Powerup, switch to register bank 2, and enable the Rx and Tx. */ 543 outb(0xe8, ioaddr + CONFIG_1); 544 545 lp->tx_started = 0; 546 lp->tx_queue_ready = 1; 547 lp->rx_started = 0; 548 lp->tx_queue = 0; 549 lp->tx_queue_len = 0; 550 551 /* Turn on hardware Tx and Rx interrupts. */ 552 outb(0x82, ioaddr + TX_INTR); 553 outb(0x81, ioaddr + RX_INTR); 554 555 /* Enable the IRQ on boards of fmv18x it is feasible. */ 556 if (lp->jumpered) { 557 outb(0x80, ioaddr + IOCONFIG1); 558 } 559 560 netif_start_queue(dev); 561 return 0; 562} 563 564static void net_tx_timeout (struct net_device *dev) 565{ 566 struct net_local *lp = netdev_priv(dev); 567 int ioaddr = dev->base_addr; 568 569 printk ("%s: transmit timed out with status %04x, %s?\n", dev->name, 570 inw (ioaddr + STATUS), inb (ioaddr + TX_STATUS) & 0x80 571 ? "IRQ conflict" : "network cable problem"); 572 printk ("%s: timeout registers: %04x %04x %04x %04x %04x %04x %04x %04x.\n", 573 dev->name, inw(ioaddr + TX_STATUS), inw(ioaddr + TX_INTR), inw(ioaddr + TX_MODE), 574 inw(ioaddr + CONFIG_0), inw(ioaddr + DATAPORT), inw(ioaddr + TX_START), 575 inw(ioaddr + MODE13 - 1), inw(ioaddr + RX_CTRL)); 576 dev->stats.tx_errors++; 577 /* ToDo: We should try to restart the adaptor... */ 578 outw(0xffff, ioaddr + MODE24); 579 outw (0xffff, ioaddr + TX_STATUS); 580 outb (0x5a, ioaddr + CONFIG_0); 581 outb (0xe8, ioaddr + CONFIG_1); 582 outw (0x8182, ioaddr + TX_INTR); 583 outb (0x00, ioaddr + TX_START); 584 outb (0x03, ioaddr + COL16CNTL); 585 586 dev->trans_start = jiffies; /* prevent tx timeout */ 587 588 lp->tx_started = 0; 589 lp->tx_queue_ready = 1; 590 lp->rx_started = 0; 591 lp->tx_queue = 0; 592 lp->tx_queue_len = 0; 593 594 netif_wake_queue(dev); 595} 596 597 598static netdev_tx_t net_send_packet (struct sk_buff *skb, 599 struct net_device *dev) 600{ 601 struct net_local *lp = netdev_priv(dev); 602 int ioaddr = dev->base_addr; 603 short length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; 604 short len = skb->len; 605 unsigned char *buf = skb->data; 606 static u8 pad[ETH_ZLEN]; 607 608 netif_stop_queue (dev); 609 610 /* We may not start transmitting unless we finish transferring 611 a packet into the Tx queue. During executing the following 612 codes we possibly catch a Tx interrupt. Thus we flag off 613 tx_queue_ready, so that we prevent the interrupt routine 614 (net_interrupt) to start transmitting. */ 615 lp->tx_queue_ready = 0; 616 { 617 outw (length, ioaddr + DATAPORT); 618 /* Packet data */ 619 outsw (ioaddr + DATAPORT, buf, len >> 1); 620 /* Check for dribble byte */ 621 if (len & 1) { 622 outw(skb->data[skb->len-1], ioaddr + DATAPORT); 623 len++; 624 } 625 /* Check for packet padding */ 626 if (length != skb->len) 627 outsw(ioaddr + DATAPORT, pad, (length - len + 1) >> 1); 628 629 lp->tx_queue++; 630 lp->tx_queue_len += length + 2; 631 } 632 lp->tx_queue_ready = 1; 633 634 if (lp->tx_started == 0) { 635 /* If the Tx is idle, always trigger a transmit. */ 636 outb (0x80 | lp->tx_queue, ioaddr + TX_START); 637 lp->tx_queue = 0; 638 lp->tx_queue_len = 0; 639 lp->tx_started = 1; 640 netif_start_queue (dev); 641 } else if (lp->tx_queue_len < 4096 - 1502) 642 /* Yes, there is room for one more packet. */ 643 netif_start_queue (dev); 644 dev_kfree_skb (skb); 645 646 return NETDEV_TX_OK; 647} 648 649/* The typical workload of the driver: 650 Handle the network interface interrupts. */ 651static irqreturn_t net_interrupt(int irq, void *dev_id) 652{ 653 struct net_device *dev = dev_id; 654 struct net_local *lp; 655 int ioaddr, status; 656 int handled = 0; 657 658 if (dev == NULL) { 659 printk ("at1700_interrupt(): irq %d for unknown device.\n", irq); 660 return IRQ_NONE; 661 } 662 663 ioaddr = dev->base_addr; 664 lp = netdev_priv(dev); 665 666 spin_lock (&lp->lock); 667 668 status = inw(ioaddr + TX_STATUS); 669 outw(status, ioaddr + TX_STATUS); 670 671 if (net_debug > 4) 672 printk("%s: Interrupt with status %04x.\n", dev->name, status); 673 if (lp->rx_started == 0 && 674 (status & 0xff00 || (inb(ioaddr + RX_MODE) & 0x40) == 0)) { 675 /* Got a packet(s). 676 We cannot execute net_rx more than once at the same time for 677 the same device. During executing net_rx, we possibly catch a 678 Tx interrupt. Thus we flag on rx_started, so that we prevent 679 the interrupt routine (net_interrupt) to dive into net_rx 680 again. */ 681 handled = 1; 682 lp->rx_started = 1; 683 outb(0x00, ioaddr + RX_INTR); /* Disable RX intr. */ 684 net_rx(dev); 685 outb(0x81, ioaddr + RX_INTR); /* Enable RX intr. */ 686 lp->rx_started = 0; 687 } 688 if (status & 0x00ff) { 689 handled = 1; 690 if (status & 0x02) { 691 /* More than 16 collisions occurred */ 692 if (net_debug > 4) 693 printk("%s: 16 Collision occur during Txing.\n", dev->name); 694 /* Cancel sending a packet. */ 695 outb(0x03, ioaddr + COL16CNTL); 696 dev->stats.collisions++; 697 } 698 if (status & 0x82) { 699 dev->stats.tx_packets++; 700 /* The Tx queue has any packets and is not being 701 transferred a packet from the host, start 702 transmitting. */ 703 if (lp->tx_queue && lp->tx_queue_ready) { 704 outb(0x80 | lp->tx_queue, ioaddr + TX_START); 705 lp->tx_queue = 0; 706 lp->tx_queue_len = 0; 707 dev->trans_start = jiffies; 708 netif_wake_queue (dev); 709 } else { 710 lp->tx_started = 0; 711 netif_wake_queue (dev); 712 } 713 } 714 } 715 716 spin_unlock (&lp->lock); 717 return IRQ_RETVAL(handled); 718} 719 720/* We have a good packet(s), get it/them out of the buffers. */ 721static void 722net_rx(struct net_device *dev) 723{ 724 int ioaddr = dev->base_addr; 725 int boguscount = 5; 726 727 while ((inb(ioaddr + RX_MODE) & 0x40) == 0) { 728 ushort status = inw(ioaddr + DATAPORT); 729 ushort pkt_len = inw(ioaddr + DATAPORT); 730 731 if (net_debug > 4) 732 printk("%s: Rxing packet mode %02x status %04x.\n", 733 dev->name, inb(ioaddr + RX_MODE), status); 734#ifndef final_version 735 if (status == 0) { 736 outb(0x05, ioaddr + RX_CTRL); 737 break; 738 } 739#endif 740 741 if ((status & 0xF0) != 0x20) { /* There was an error. */ 742 dev->stats.rx_errors++; 743 if (status & 0x08) dev->stats.rx_length_errors++; 744 if (status & 0x04) dev->stats.rx_frame_errors++; 745 if (status & 0x02) dev->stats.rx_crc_errors++; 746 if (status & 0x01) dev->stats.rx_over_errors++; 747 } else { 748 /* Malloc up new buffer. */ 749 struct sk_buff *skb; 750 751 if (pkt_len > 1550) { 752 printk("%s: The AT1700 claimed a very large packet, size %d.\n", 753 dev->name, pkt_len); 754 /* Prime the FIFO and then flush the packet. */ 755 inw(ioaddr + DATAPORT); inw(ioaddr + DATAPORT); 756 outb(0x05, ioaddr + RX_CTRL); 757 dev->stats.rx_errors++; 758 break; 759 } 760 skb = dev_alloc_skb(pkt_len+3); 761 if (skb == NULL) { 762 printk("%s: Memory squeeze, dropping packet (len %d).\n", 763 dev->name, pkt_len); 764 /* Prime the FIFO and then flush the packet. */ 765 inw(ioaddr + DATAPORT); inw(ioaddr + DATAPORT); 766 outb(0x05, ioaddr + RX_CTRL); 767 dev->stats.rx_dropped++; 768 break; 769 } 770 skb_reserve(skb,2); 771 772 insw(ioaddr + DATAPORT, skb_put(skb,pkt_len), (pkt_len + 1) >> 1); 773 skb->protocol=eth_type_trans(skb, dev); 774 netif_rx(skb); 775 dev->stats.rx_packets++; 776 dev->stats.rx_bytes += pkt_len; 777 } 778 if (--boguscount <= 0) 779 break; 780 } 781 782 /* If any worth-while packets have been received, dev_rint() 783 has done a mark_bh(NET_BH) for us and will work on them 784 when we get to the bottom-half routine. */ 785 { 786 int i; 787 for (i = 0; i < 20; i++) { 788 if ((inb(ioaddr + RX_MODE) & 0x40) == 0x40) 789 break; 790 inw(ioaddr + DATAPORT); /* dummy status read */ 791 outb(0x05, ioaddr + RX_CTRL); 792 } 793 794 if (net_debug > 5) 795 printk("%s: Exint Rx packet with mode %02x after %d ticks.\n", 796 dev->name, inb(ioaddr + RX_MODE), i); 797 } 798} 799 800/* The inverse routine to net_open(). */ 801static int net_close(struct net_device *dev) 802{ 803 struct net_local *lp = netdev_priv(dev); 804 int ioaddr = dev->base_addr; 805 806 netif_stop_queue(dev); 807 808 /* Set configuration register 0 to disable Tx and Rx. */ 809 outb(0xda, ioaddr + CONFIG_0); 810 811 /* No statistic counters on the chip to update. */ 812 813 /* Disable the IRQ on boards of fmv18x where it is feasible. */ 814 if (lp->jumpered) 815 outb(0x00, ioaddr + IOCONFIG1); 816 817 /* Power-down the chip. Green, green, green! */ 818 outb(0x00, ioaddr + CONFIG_1); 819 return 0; 820} 821 822/* 823 Set the multicast/promiscuous mode for this adaptor. 824*/ 825 826static void 827set_rx_mode(struct net_device *dev) 828{ 829 int ioaddr = dev->base_addr; 830 struct net_local *lp = netdev_priv(dev); 831 unsigned char mc_filter[8]; /* Multicast hash filter */ 832 unsigned long flags; 833 834 if (dev->flags & IFF_PROMISC) { 835 memset(mc_filter, 0xff, sizeof(mc_filter)); 836 outb(3, ioaddr + RX_MODE); /* Enable promiscuous mode */ 837 } else if (netdev_mc_count(dev) > MC_FILTERBREAK || 838 (dev->flags & IFF_ALLMULTI)) { 839 /* Too many to filter perfectly -- accept all multicasts. */ 840 memset(mc_filter, 0xff, sizeof(mc_filter)); 841 outb(2, ioaddr + RX_MODE); /* Use normal mode. */ 842 } else if (netdev_mc_empty(dev)) { 843 memset(mc_filter, 0x00, sizeof(mc_filter)); 844 outb(1, ioaddr + RX_MODE); /* Ignore almost all multicasts. */ 845 } else { 846 struct netdev_hw_addr *ha; 847 848 memset(mc_filter, 0, sizeof(mc_filter)); 849 netdev_for_each_mc_addr(ha, dev) { 850 unsigned int bit = 851 ether_crc_le(ETH_ALEN, ha->addr) >> 26; 852 mc_filter[bit >> 3] |= (1 << bit); 853 } 854 outb(0x02, ioaddr + RX_MODE); /* Use normal mode. */ 855 } 856 857 spin_lock_irqsave (&lp->lock, flags); 858 if (memcmp(mc_filter, lp->mc_filter, sizeof(mc_filter))) { 859 int i; 860 int saved_bank = inw(ioaddr + CONFIG_0); 861 /* Switch to bank 1 and set the multicast table. */ 862 outw((saved_bank & ~0x0C00) | 0x0480, ioaddr + CONFIG_0); 863 for (i = 0; i < 8; i++) 864 outb(mc_filter[i], ioaddr + PORT_OFFSET(8 + i)); 865 memcpy(lp->mc_filter, mc_filter, sizeof(mc_filter)); 866 outw(saved_bank, ioaddr + CONFIG_0); 867 } 868 spin_unlock_irqrestore (&lp->lock, flags); 869} 870 871#ifdef MODULE 872static struct net_device *dev_at1700; 873 874module_param(io, int, 0); 875module_param(irq, int, 0); 876module_param(net_debug, int, 0); 877MODULE_PARM_DESC(io, "AT1700/FMV18X I/O base address"); 878MODULE_PARM_DESC(irq, "AT1700/FMV18X IRQ number"); 879MODULE_PARM_DESC(net_debug, "AT1700/FMV18X debug level (0-6)"); 880 881static int __init at1700_module_init(void) 882{ 883 if (io == 0) 884 printk("at1700: You should not use auto-probing with insmod!\n"); 885 dev_at1700 = at1700_probe(-1); 886 if (IS_ERR(dev_at1700)) 887 return PTR_ERR(dev_at1700); 888 return 0; 889} 890 891static void __exit at1700_module_exit(void) 892{ 893 unregister_netdev(dev_at1700); 894 cleanup_card(dev_at1700); 895 free_netdev(dev_at1700); 896} 897module_init(at1700_module_init); 898module_exit(at1700_module_exit); 899#endif /* MODULE */ 900MODULE_LICENSE("GPL"); 901