1/* 2 * linux/drivers/acorn/net/ether3.c 3 * 4 * Copyright (C) 1995-2000 Russell King 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * SEEQ nq8005 ethernet driver for Acorn/ANT Ether3 card 11 * for Acorn machines 12 * 13 * By Russell King, with some suggestions from borris@ant.co.uk 14 * 15 * Changelog: 16 * 1.04 RMK 29/02/1996 Won't pass packets that are from our ethernet 17 * address up to the higher levels - they're 18 * silently ignored. I/F can now be put into 19 * multicast mode. Receiver routine optimised. 20 * 1.05 RMK 30/02/1996 Now claims interrupt at open when part of 21 * the kernel rather than when a module. 22 * 1.06 RMK 02/03/1996 Various code cleanups 23 * 1.07 RMK 13/10/1996 Optimised interrupt routine and transmit 24 * routines. 25 * 1.08 RMK 14/10/1996 Fixed problem with too many packets, 26 * prevented the kernel message about dropped 27 * packets appearing too many times a second. 28 * Now does not disable all IRQs, only the IRQ 29 * used by this card. 30 * 1.09 RMK 10/11/1996 Only enables TX irq when buffer space is low, 31 * but we still service the TX queue if we get a 32 * RX interrupt. 33 * 1.10 RMK 15/07/1997 Fixed autoprobing of NQ8004. 34 * 1.11 RMK 16/11/1997 Fixed autoprobing of NQ8005A. 35 * 1.12 RMK 31/12/1997 Removed reference to dev_tint for Linux 2.1. 36 * RMK 27/06/1998 Changed asm/delay.h to linux/delay.h. 37 * 1.13 RMK 29/06/1998 Fixed problem with transmission of packets. 38 * Chip seems to have a bug in, whereby if the 39 * packet starts two bytes from the end of the 40 * buffer, it corrupts the receiver chain, and 41 * never updates the transmit status correctly. 42 * 1.14 RMK 07/01/1998 Added initial code for ETHERB addressing. 43 * 1.15 RMK 30/04/1999 More fixes to the transmit routine for buggy 44 * hardware. 45 * 1.16 RMK 10/02/2000 Updated for 2.3.43 46 * 1.17 RMK 13/05/2000 Updated for 2.3.99-pre8 47 */ 48 49#include <linux/module.h> 50#include <linux/kernel.h> 51#include <linux/types.h> 52#include <linux/fcntl.h> 53#include <linux/interrupt.h> 54#include <linux/ioport.h> 55#include <linux/in.h> 56#include <linux/slab.h> 57#include <linux/string.h> 58#include <linux/errno.h> 59#include <linux/netdevice.h> 60#include <linux/etherdevice.h> 61#include <linux/skbuff.h> 62#include <linux/device.h> 63#include <linux/init.h> 64#include <linux/delay.h> 65#include <linux/bitops.h> 66 67#include <asm/system.h> 68#include <asm/ecard.h> 69#include <asm/io.h> 70 71static char version[] __devinitdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n"; 72 73#include "ether3.h" 74 75static unsigned int net_debug = NET_DEBUG; 76 77static void ether3_setmulticastlist(struct net_device *dev); 78static int ether3_rx(struct net_device *dev, unsigned int maxcnt); 79static void ether3_tx(struct net_device *dev); 80static int ether3_open (struct net_device *dev); 81static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev); 82static irqreturn_t ether3_interrupt (int irq, void *dev_id); 83static int ether3_close (struct net_device *dev); 84static struct net_device_stats *ether3_getstats (struct net_device *dev); 85static void ether3_setmulticastlist (struct net_device *dev); 86static void ether3_timeout(struct net_device *dev); 87 88#define BUS_16 2 89#define BUS_8 1 90#define BUS_UNKNOWN 0 91 92/* --------------------------------------------------------------------------- */ 93 94typedef enum { 95 buffer_write, 96 buffer_read 97} buffer_rw_t; 98 99/* 100 * ether3 read/write. Slow things down a bit... 101 * The SEEQ8005 doesn't like us writing to its registers 102 * too quickly. 103 */ 104static inline void ether3_outb(int v, const void __iomem *r) 105{ 106 writeb(v, r); 107 udelay(1); 108} 109 110static inline void ether3_outw(int v, const void __iomem *r) 111{ 112 writew(v, r); 113 udelay(1); 114} 115#define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; }) 116#define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; }) 117 118static int 119ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start) 120{ 121 int timeout = 1000; 122 123 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 124 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); 125 126 while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) { 127 if (!timeout--) { 128 printk("%s: setbuffer broken\n", dev->name); 129 priv(dev)->broken = 1; 130 return 1; 131 } 132 udelay(1); 133 } 134 135 if (read == buffer_read) { 136 ether3_outw(start, REG_DMAADDR); 137 ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND); 138 } else { 139 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); 140 ether3_outw(start, REG_DMAADDR); 141 } 142 return 0; 143} 144 145/* 146 * write data to the buffer memory 147 */ 148#define ether3_writebuffer(dev,data,length) \ 149 writesw(REG_BUFWIN, (data), (length) >> 1) 150 151#define ether3_writeword(dev,data) \ 152 writew((data), REG_BUFWIN) 153 154#define ether3_writelong(dev,data) { \ 155 void __iomem *reg_bufwin = REG_BUFWIN; \ 156 writew((data), reg_bufwin); \ 157 writew((data) >> 16, reg_bufwin); \ 158} 159 160/* 161 * read data from the buffer memory 162 */ 163#define ether3_readbuffer(dev,data,length) \ 164 readsw(REG_BUFWIN, (data), (length) >> 1) 165 166#define ether3_readword(dev) \ 167 readw(REG_BUFWIN) 168 169#define ether3_readlong(dev) \ 170 readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16) 171 172/* 173 * Switch LED off... 174 */ 175static void ether3_ledoff(unsigned long data) 176{ 177 struct net_device *dev = (struct net_device *)data; 178 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2); 179} 180 181/* 182 * switch LED on... 183 */ 184static inline void ether3_ledon(struct net_device *dev) 185{ 186 del_timer(&priv(dev)->timer); 187 priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */ 188 priv(dev)->timer.data = (unsigned long)dev; 189 priv(dev)->timer.function = ether3_ledoff; 190 add_timer(&priv(dev)->timer); 191 if (priv(dev)->regs.config2 & CFG2_CTRLO) 192 ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2); 193} 194 195/* 196 * Read the ethernet address string from the on board rom. 197 * This is an ascii string!!! 198 */ 199static int __devinit 200ether3_addr(char *addr, struct expansion_card *ec) 201{ 202 struct in_chunk_dir cd; 203 char *s; 204 205 if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) { 206 int i; 207 for (i = 0; i<6; i++) { 208 addr[i] = simple_strtoul(s + 1, &s, 0x10); 209 if (*s != (i==5?')' : ':' )) 210 break; 211 } 212 if (i == 6) 213 return 0; 214 } 215 /* I wonder if we should even let the user continue in this case 216 * - no, it would be better to disable the device 217 */ 218 printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n"); 219 return -ENODEV; 220} 221 222/* --------------------------------------------------------------------------- */ 223 224static int __devinit 225ether3_ramtest(struct net_device *dev, unsigned char byte) 226{ 227 unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL); 228 int i,ret = 0; 229 int max_errors = 4; 230 int bad = -1; 231 232 if (!buffer) 233 return 1; 234 235 memset(buffer, byte, RX_END); 236 ether3_setbuffer(dev, buffer_write, 0); 237 ether3_writebuffer(dev, buffer, TX_END); 238 ether3_setbuffer(dev, buffer_write, RX_START); 239 ether3_writebuffer(dev, buffer + RX_START, RX_LEN); 240 memset(buffer, byte ^ 0xff, RX_END); 241 ether3_setbuffer(dev, buffer_read, 0); 242 ether3_readbuffer(dev, buffer, TX_END); 243 ether3_setbuffer(dev, buffer_read, RX_START); 244 ether3_readbuffer(dev, buffer + RX_START, RX_LEN); 245 246 for (i = 0; i < RX_END; i++) { 247 if (buffer[i] != byte) { 248 if (max_errors > 0 && bad != buffer[i]) { 249 printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X", 250 dev->name, buffer[i], byte, i); 251 ret = 2; 252 max_errors--; 253 bad = i; 254 } 255 } else { 256 if (bad != -1) { 257 if (bad != i - 1) 258 printk(" - 0x%04X\n", i - 1); 259 printk("\n"); 260 bad = -1; 261 } 262 } 263 } 264 if (bad != -1) 265 printk(" - 0xffff\n"); 266 kfree(buffer); 267 268 return ret; 269} 270 271/* ------------------------------------------------------------------------------- */ 272 273static int __devinit ether3_init_2(struct net_device *dev) 274{ 275 int i; 276 277 priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8; 278 priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC; 279 priv(dev)->regs.command = 0; 280 281 /* 282 * Set up our hardware address 283 */ 284 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); 285 for (i = 0; i < 6; i++) 286 ether3_outb(dev->dev_addr[i], REG_BUFWIN); 287 288 if (dev->flags & IFF_PROMISC) 289 priv(dev)->regs.config1 |= CFG1_RECVPROMISC; 290 else if (dev->flags & IFF_MULTICAST) 291 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; 292 else 293 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; 294 295 /* 296 * There is a problem with the NQ8005 in that it occasionally loses the 297 * last two bytes. To get round this problem, we receive the CRC as 298 * well. That way, if we do lose the last two, then it doesn't matter. 299 */ 300 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); 301 ether3_outw((TX_END>>8) - 1, REG_BUFWIN); 302 ether3_outw(priv(dev)->rx_head, REG_RECVPTR); 303 ether3_outw(0, REG_TRANSMITPTR); 304 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); 305 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); 306 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 307 ether3_outw(priv(dev)->regs.command, REG_COMMAND); 308 309 i = ether3_ramtest(dev, 0x5A); 310 if(i) 311 return i; 312 i = ether3_ramtest(dev, 0x1E); 313 if(i) 314 return i; 315 316 ether3_setbuffer(dev, buffer_write, 0); 317 ether3_writelong(dev, 0); 318 return 0; 319} 320 321static void 322ether3_init_for_open(struct net_device *dev) 323{ 324 int i; 325 326 memset(&priv(dev)->stats, 0, sizeof(struct net_device_stats)); 327 328 /* Reset the chip */ 329 ether3_outw(CFG2_RESET, REG_CONFIG2); 330 udelay(4); 331 332 priv(dev)->regs.command = 0; 333 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); 334 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) 335 barrier(); 336 337 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); 338 for (i = 0; i < 6; i++) 339 ether3_outb(dev->dev_addr[i], REG_BUFWIN); 340 341 priv(dev)->tx_head = 0; 342 priv(dev)->tx_tail = 0; 343 priv(dev)->regs.config2 |= CFG2_CTRLO; 344 priv(dev)->rx_head = RX_START; 345 346 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); 347 ether3_outw((TX_END>>8) - 1, REG_BUFWIN); 348 ether3_outw(priv(dev)->rx_head, REG_RECVPTR); 349 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); 350 ether3_outw(0, REG_TRANSMITPTR); 351 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); 352 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 353 354 ether3_setbuffer(dev, buffer_write, 0); 355 ether3_writelong(dev, 0); 356 357 priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX; 358 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); 359} 360 361static inline int 362ether3_probe_bus_8(struct net_device *dev, int val) 363{ 364 int write_low, write_high, read_low, read_high; 365 366 write_low = val & 255; 367 write_high = val >> 8; 368 369 printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low); 370 371 ether3_outb(write_low, REG_RECVPTR); 372 ether3_outb(write_high, REG_RECVPTR + 4); 373 374 read_low = ether3_inb(REG_RECVPTR); 375 read_high = ether3_inb(REG_RECVPTR + 4); 376 377 printk(", read8 [%02X:%02X]\n", read_high, read_low); 378 379 return read_low == write_low && read_high == write_high; 380} 381 382static inline int 383ether3_probe_bus_16(struct net_device *dev, int val) 384{ 385 int read_val; 386 387 ether3_outw(val, REG_RECVPTR); 388 read_val = ether3_inw(REG_RECVPTR); 389 390 printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val); 391 392 return read_val == val; 393} 394 395/* 396 * Open/initialize the board. This is called (in the current kernel) 397 * sometime after booting when the 'ifconfig' program is run. 398 * 399 * This routine should set everything up anew at each open, even 400 * registers that "should" only need to be set once at boot, so that 401 * there is non-reboot way to recover if something goes wrong. 402 */ 403static int 404ether3_open(struct net_device *dev) 405{ 406 if (!is_valid_ether_addr(dev->dev_addr)) { 407 printk(KERN_WARNING "%s: invalid ethernet MAC address\n", 408 dev->name); 409 return -EINVAL; 410 } 411 412 if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev)) 413 return -EAGAIN; 414 415 ether3_init_for_open(dev); 416 417 netif_start_queue(dev); 418 419 return 0; 420} 421 422/* 423 * The inverse routine to ether3_open(). 424 */ 425static int 426ether3_close(struct net_device *dev) 427{ 428 netif_stop_queue(dev); 429 430 disable_irq(dev->irq); 431 432 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); 433 priv(dev)->regs.command = 0; 434 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) 435 barrier(); 436 ether3_outb(0x80, REG_CONFIG2 + 4); 437 ether3_outw(0, REG_COMMAND); 438 439 free_irq(dev->irq, dev); 440 441 return 0; 442} 443 444/* 445 * Get the current statistics. This may be called with the card open or 446 * closed. 447 */ 448static struct net_device_stats *ether3_getstats(struct net_device *dev) 449{ 450 return &priv(dev)->stats; 451} 452 453/* 454 * Set or clear promiscuous/multicast mode filter for this adaptor. 455 * 456 * We don't attempt any packet filtering. The card may have a SEEQ 8004 457 * in which does not have the other ethernet address registers present... 458 */ 459static void ether3_setmulticastlist(struct net_device *dev) 460{ 461 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC; 462 463 if (dev->flags & IFF_PROMISC) { 464 /* promiscuous mode */ 465 priv(dev)->regs.config1 |= CFG1_RECVPROMISC; 466 } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) { 467 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; 468 } else 469 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; 470 471 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 472} 473 474static void ether3_timeout(struct net_device *dev) 475{ 476 unsigned long flags; 477 478 del_timer(&priv(dev)->timer); 479 480 local_irq_save(flags); 481 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name); 482 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name, 483 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2)); 484 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name, 485 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR)); 486 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name, 487 priv(dev)->tx_head, priv(dev)->tx_tail); 488 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail); 489 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev)); 490 local_irq_restore(flags); 491 492 priv(dev)->regs.config2 |= CFG2_CTRLO; 493 priv(dev)->stats.tx_errors += 1; 494 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); 495 priv(dev)->tx_head = priv(dev)->tx_tail = 0; 496 497 netif_wake_queue(dev); 498} 499 500/* 501 * Transmit a packet 502 */ 503static int 504ether3_sendpacket(struct sk_buff *skb, struct net_device *dev) 505{ 506 unsigned long flags; 507 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; 508 unsigned int ptr, next_ptr; 509 510 if (priv(dev)->broken) { 511 dev_kfree_skb(skb); 512 priv(dev)->stats.tx_dropped ++; 513 netif_start_queue(dev); 514 return NETDEV_TX_OK; 515 } 516 517 length = (length + 1) & ~1; 518 if (length != skb->len) { 519 if (skb_padto(skb, length)) 520 goto out; 521 } 522 523 next_ptr = (priv(dev)->tx_head + 1) & 15; 524 525 local_irq_save(flags); 526 527 if (priv(dev)->tx_tail == next_ptr) { 528 local_irq_restore(flags); 529 return NETDEV_TX_BUSY; /* unable to queue */ 530 } 531 532 ptr = 0x600 * priv(dev)->tx_head; 533 priv(dev)->tx_head = next_ptr; 534 next_ptr *= 0x600; 535 536#define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS) 537 538 ether3_setbuffer(dev, buffer_write, next_ptr); 539 ether3_writelong(dev, 0); 540 ether3_setbuffer(dev, buffer_write, ptr); 541 ether3_writelong(dev, 0); 542 ether3_writebuffer(dev, skb->data, length); 543 ether3_writeword(dev, htons(next_ptr)); 544 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16); 545 ether3_setbuffer(dev, buffer_write, ptr); 546 ether3_writeword(dev, htons((ptr + length + 4))); 547 ether3_writeword(dev, TXHDR_FLAGS >> 16); 548 ether3_ledon(dev); 549 550 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) { 551 ether3_outw(ptr, REG_TRANSMITPTR); 552 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND); 553 } 554 555 next_ptr = (priv(dev)->tx_head + 1) & 15; 556 local_irq_restore(flags); 557 558 dev_kfree_skb(skb); 559 560 if (priv(dev)->tx_tail == next_ptr) 561 netif_stop_queue(dev); 562 563 out: 564 return NETDEV_TX_OK; 565} 566 567static irqreturn_t 568ether3_interrupt(int irq, void *dev_id) 569{ 570 struct net_device *dev = (struct net_device *)dev_id; 571 unsigned int status, handled = IRQ_NONE; 572 573#if NET_DEBUG > 1 574 if(net_debug & DEBUG_INT) 575 printk("eth3irq: %d ", irq); 576#endif 577 578 status = ether3_inw(REG_STATUS); 579 580 if (status & STAT_INTRX) { 581 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND); 582 ether3_rx(dev, 12); 583 handled = IRQ_HANDLED; 584 } 585 586 if (status & STAT_INTTX) { 587 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND); 588 ether3_tx(dev); 589 handled = IRQ_HANDLED; 590 } 591 592#if NET_DEBUG > 1 593 if(net_debug & DEBUG_INT) 594 printk("done\n"); 595#endif 596 return handled; 597} 598 599/* 600 * If we have a good packet(s), get it/them out of the buffers. 601 */ 602static int ether3_rx(struct net_device *dev, unsigned int maxcnt) 603{ 604 unsigned int next_ptr = priv(dev)->rx_head, received = 0; 605 606 ether3_ledon(dev); 607 608 do { 609 unsigned int this_ptr, status; 610 unsigned char addrs[16]; 611 612 /* 613 * read the first 16 bytes from the buffer. 614 * This contains the status bytes etc and ethernet addresses, 615 * and we also check the source ethernet address to see if 616 * it originated from us. 617 */ 618 { 619 unsigned int temp_ptr; 620 ether3_setbuffer(dev, buffer_read, next_ptr); 621 temp_ptr = ether3_readword(dev); 622 status = ether3_readword(dev); 623 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) != 624 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr) 625 break; 626 627 this_ptr = next_ptr + 4; 628 next_ptr = ntohs(temp_ptr); 629 } 630 ether3_setbuffer(dev, buffer_read, this_ptr); 631 ether3_readbuffer(dev, addrs+2, 12); 632 633if (next_ptr < RX_START || next_ptr >= RX_END) { 634 int i; 635 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head); 636 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8); 637 for (i = 2; i < 14; i++) 638 printk("%02X ", addrs[i]); 639 printk("\n"); 640 next_ptr = priv(dev)->rx_head; 641 break; 642} 643 /* 644 * ignore our own packets... 645 */ 646 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) && 647 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) { 648 maxcnt ++; /* compensate for loopedback packet */ 649 ether3_outw(next_ptr >> 8, REG_RECVEND); 650 } else 651 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) { 652 unsigned int length = next_ptr - this_ptr; 653 struct sk_buff *skb; 654 655 if (next_ptr <= this_ptr) 656 length += RX_END - RX_START; 657 658 skb = dev_alloc_skb(length + 2); 659 if (skb) { 660 unsigned char *buf; 661 662 skb_reserve(skb, 2); 663 buf = skb_put(skb, length); 664 ether3_readbuffer(dev, buf + 12, length - 12); 665 ether3_outw(next_ptr >> 8, REG_RECVEND); 666 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2); 667 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4); 668 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8); 669 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12); 670 skb->protocol = eth_type_trans(skb, dev); 671 netif_rx(skb); 672 received ++; 673 } else 674 goto dropping; 675 } else { 676 struct net_device_stats *stats = &priv(dev)->stats; 677 ether3_outw(next_ptr >> 8, REG_RECVEND); 678 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++; 679 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++; 680 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++; 681 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++; 682 stats->rx_errors++; 683 } 684 } 685 while (-- maxcnt); 686 687done: 688 priv(dev)->stats.rx_packets += received; 689 priv(dev)->rx_head = next_ptr; 690 /* 691 * If rx went off line, then that means that the buffer may be full. We 692 * have dropped at least one packet. 693 */ 694 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) { 695 priv(dev)->stats.rx_dropped ++; 696 ether3_outw(next_ptr, REG_RECVPTR); 697 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); 698 } 699 700 return maxcnt; 701 702dropping:{ 703 static unsigned long last_warned; 704 705 ether3_outw(next_ptr >> 8, REG_RECVEND); 706 /* 707 * Don't print this message too many times... 708 */ 709 if (time_after(jiffies, last_warned + 10 * HZ)) { 710 last_warned = jiffies; 711 printk("%s: memory squeeze, dropping packet.\n", dev->name); 712 } 713 priv(dev)->stats.rx_dropped ++; 714 goto done; 715 } 716} 717 718/* 719 * Update stats for the transmitted packet(s) 720 */ 721static void ether3_tx(struct net_device *dev) 722{ 723 unsigned int tx_tail = priv(dev)->tx_tail; 724 int max_work = 14; 725 726 do { 727 unsigned long status; 728 729 /* 730 * Read the packet header 731 */ 732 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600); 733 status = ether3_readlong(dev); 734 735 /* 736 * Check to see if this packet has been transmitted 737 */ 738 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) != 739 (TXSTAT_DONE | TXHDR_TRANSMIT)) 740 break; 741 742 /* 743 * Update errors 744 */ 745 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS))) 746 priv(dev)->stats.tx_packets++; 747 else { 748 priv(dev)->stats.tx_errors ++; 749 if (status & TXSTAT_16COLLISIONS) 750 priv(dev)->stats.collisions += 16; 751 if (status & TXSTAT_BABBLED) 752 priv(dev)->stats.tx_fifo_errors ++; 753 } 754 755 tx_tail = (tx_tail + 1) & 15; 756 } while (--max_work); 757 758 if (priv(dev)->tx_tail != tx_tail) { 759 priv(dev)->tx_tail = tx_tail; 760 netif_wake_queue(dev); 761 } 762} 763 764static void __devinit ether3_banner(void) 765{ 766 static unsigned version_printed = 0; 767 768 if (net_debug && version_printed++ == 0) 769 printk(KERN_INFO "%s", version); 770} 771 772static const struct net_device_ops ether3_netdev_ops = { 773 .ndo_open = ether3_open, 774 .ndo_stop = ether3_close, 775 .ndo_start_xmit = ether3_sendpacket, 776 .ndo_get_stats = ether3_getstats, 777 .ndo_set_multicast_list = ether3_setmulticastlist, 778 .ndo_tx_timeout = ether3_timeout, 779 .ndo_validate_addr = eth_validate_addr, 780 .ndo_change_mtu = eth_change_mtu, 781 .ndo_set_mac_address = eth_mac_addr, 782}; 783 784static int __devinit 785ether3_probe(struct expansion_card *ec, const struct ecard_id *id) 786{ 787 const struct ether3_data *data = id->data; 788 struct net_device *dev; 789 int bus_type, ret; 790 791 ether3_banner(); 792 793 ret = ecard_request_resources(ec); 794 if (ret) 795 goto out; 796 797 dev = alloc_etherdev(sizeof(struct dev_priv)); 798 if (!dev) { 799 ret = -ENOMEM; 800 goto release; 801 } 802 803 SET_NETDEV_DEV(dev, &ec->dev); 804 805 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); 806 if (!priv(dev)->base) { 807 ret = -ENOMEM; 808 goto free; 809 } 810 811 ec->irqaddr = priv(dev)->base + data->base_offset; 812 ec->irqmask = 0xf0; 813 814 priv(dev)->seeq = priv(dev)->base + data->base_offset; 815 dev->irq = ec->irq; 816 817 ether3_addr(dev->dev_addr, ec); 818 819 init_timer(&priv(dev)->timer); 820 821 /* Reset card... 822 */ 823 ether3_outb(0x80, REG_CONFIG2 + 4); 824 bus_type = BUS_UNKNOWN; 825 udelay(4); 826 827 /* Test using Receive Pointer (16-bit register) to find out 828 * how the ether3 is connected to the bus... 829 */ 830 if (ether3_probe_bus_8(dev, 0x100) && 831 ether3_probe_bus_8(dev, 0x201)) 832 bus_type = BUS_8; 833 834 if (bus_type == BUS_UNKNOWN && 835 ether3_probe_bus_16(dev, 0x101) && 836 ether3_probe_bus_16(dev, 0x201)) 837 bus_type = BUS_16; 838 839 switch (bus_type) { 840 case BUS_UNKNOWN: 841 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name); 842 ret = -ENODEV; 843 goto free; 844 845 case BUS_8: 846 printk(KERN_ERR "%s: %s found, but is an unsupported " 847 "8-bit card\n", dev->name, data->name); 848 ret = -ENODEV; 849 goto free; 850 851 default: 852 break; 853 } 854 855 if (ether3_init_2(dev)) { 856 ret = -ENODEV; 857 goto free; 858 } 859 860 dev->netdev_ops = ðer3_netdev_ops; 861 dev->watchdog_timeo = 5 * HZ / 100; 862 863 ret = register_netdev(dev); 864 if (ret) 865 goto free; 866 867 printk("%s: %s in slot %d, %pM\n", 868 dev->name, data->name, ec->slot_no, dev->dev_addr); 869 870 ecard_set_drvdata(ec, dev); 871 return 0; 872 873 free: 874 free_netdev(dev); 875 release: 876 ecard_release_resources(ec); 877 out: 878 return ret; 879} 880 881static void __devexit ether3_remove(struct expansion_card *ec) 882{ 883 struct net_device *dev = ecard_get_drvdata(ec); 884 885 ecard_set_drvdata(ec, NULL); 886 887 unregister_netdev(dev); 888 free_netdev(dev); 889 ecard_release_resources(ec); 890} 891 892static struct ether3_data ether3 = { 893 .name = "ether3", 894 .base_offset = 0, 895}; 896 897static struct ether3_data etherb = { 898 .name = "etherb", 899 .base_offset = 0x800, 900}; 901 902static const struct ecard_id ether3_ids[] = { 903 { MANU_ANT2, PROD_ANT_ETHER3, ðer3 }, 904 { MANU_ANT, PROD_ANT_ETHER3, ðer3 }, 905 { MANU_ANT, PROD_ANT_ETHERB, ðerb }, 906 { 0xffff, 0xffff } 907}; 908 909static struct ecard_driver ether3_driver = { 910 .probe = ether3_probe, 911 .remove = __devexit_p(ether3_remove), 912 .id_table = ether3_ids, 913 .drv = { 914 .name = "ether3", 915 }, 916}; 917 918static int __init ether3_init(void) 919{ 920 return ecard_register_driver(ðer3_driver); 921} 922 923static void __exit ether3_exit(void) 924{ 925 ecard_remove_driver(ðer3_driver); 926} 927 928module_init(ether3_init); 929module_exit(ether3_exit); 930 931MODULE_LICENSE("GPL"); 932