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/ptrace.h> 55#include <linux/ioport.h> 56#include <linux/in.h> 57#include <linux/slab.h> 58#include <linux/string.h> 59#include <linux/errno.h> 60#include <linux/netdevice.h> 61#include <linux/etherdevice.h> 62#include <linux/skbuff.h> 63#include <linux/device.h> 64#include <linux/init.h> 65#include <linux/delay.h> 66#include <linux/bitops.h> 67 68#include <asm/system.h> 69#include <asm/ecard.h> 70#include <asm/io.h> 71 72static char version[] __initdata = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n"; 73 74#include "ether3.h" 75 76static unsigned int net_debug = NET_DEBUG; 77 78static void ether3_setmulticastlist(struct net_device *dev); 79static int ether3_rx(struct net_device *dev, unsigned int maxcnt); 80static void ether3_tx(struct net_device *dev); 81static int ether3_open (struct net_device *dev); 82static int ether3_sendpacket (struct sk_buff *skb, struct net_device *dev); 83static irqreturn_t ether3_interrupt (int irq, void *dev_id); 84static int ether3_close (struct net_device *dev); 85static struct net_device_stats *ether3_getstats (struct net_device *dev); 86static void ether3_setmulticastlist (struct net_device *dev); 87static void ether3_timeout(struct net_device *dev); 88 89#define BUS_16 2 90#define BUS_8 1 91#define BUS_UNKNOWN 0 92 93/* --------------------------------------------------------------------------- */ 94 95typedef enum { 96 buffer_write, 97 buffer_read 98} buffer_rw_t; 99 100/* 101 * ether3 read/write. Slow things down a bit... 102 * The SEEQ8005 doesn't like us writing to its registers 103 * too quickly. 104 */ 105static inline void ether3_outb(int v, const void __iomem *r) 106{ 107 writeb(v, r); 108 udelay(1); 109} 110 111static inline void ether3_outw(int v, const void __iomem *r) 112{ 113 writew(v, r); 114 udelay(1); 115} 116#define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; }) 117#define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; }) 118 119static int 120ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start) 121{ 122 int timeout = 1000; 123 124 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 125 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); 126 127 while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) { 128 if (!timeout--) { 129 printk("%s: setbuffer broken\n", dev->name); 130 priv(dev)->broken = 1; 131 return 1; 132 } 133 udelay(1); 134 } 135 136 if (read == buffer_read) { 137 ether3_outw(start, REG_DMAADDR); 138 ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND); 139 } else { 140 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); 141 ether3_outw(start, REG_DMAADDR); 142 } 143 return 0; 144} 145 146/* 147 * write data to the buffer memory 148 */ 149#define ether3_writebuffer(dev,data,length) \ 150 writesw(REG_BUFWIN, (data), (length) >> 1) 151 152#define ether3_writeword(dev,data) \ 153 writew((data), REG_BUFWIN) 154 155#define ether3_writelong(dev,data) { \ 156 void __iomem *reg_bufwin = REG_BUFWIN; \ 157 writew((data), reg_bufwin); \ 158 writew((data) >> 16, reg_bufwin); \ 159} 160 161/* 162 * read data from the buffer memory 163 */ 164#define ether3_readbuffer(dev,data,length) \ 165 readsw(REG_BUFWIN, (data), (length) >> 1) 166 167#define ether3_readword(dev) \ 168 readw(REG_BUFWIN) 169 170#define ether3_readlong(dev) \ 171 readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16) 172 173/* 174 * Switch LED off... 175 */ 176static void ether3_ledoff(unsigned long data) 177{ 178 struct net_device *dev = (struct net_device *)data; 179 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2); 180} 181 182/* 183 * switch LED on... 184 */ 185static inline void ether3_ledon(struct net_device *dev) 186{ 187 del_timer(&priv(dev)->timer); 188 priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */ 189 priv(dev)->timer.data = (unsigned long)dev; 190 priv(dev)->timer.function = ether3_ledoff; 191 add_timer(&priv(dev)->timer); 192 if (priv(dev)->regs.config2 & CFG2_CTRLO) 193 ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2); 194} 195 196/* 197 * Read the ethernet address string from the on board rom. 198 * This is an ascii string!!! 199 */ 200static int __devinit 201ether3_addr(char *addr, struct expansion_card *ec) 202{ 203 struct in_chunk_dir cd; 204 char *s; 205 206 if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) { 207 int i; 208 for (i = 0; i<6; i++) { 209 addr[i] = simple_strtoul(s + 1, &s, 0x10); 210 if (*s != (i==5?')' : ':' )) 211 break; 212 } 213 if (i == 6) 214 return 0; 215 } 216 /* I wonder if we should even let the user continue in this case 217 * - no, it would be better to disable the device 218 */ 219 printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n"); 220 return -ENODEV; 221} 222 223/* --------------------------------------------------------------------------- */ 224 225static int __devinit 226ether3_ramtest(struct net_device *dev, unsigned char byte) 227{ 228 unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL); 229 int i,ret = 0; 230 int max_errors = 4; 231 int bad = -1; 232 233 if (!buffer) 234 return 1; 235 236 memset(buffer, byte, RX_END); 237 ether3_setbuffer(dev, buffer_write, 0); 238 ether3_writebuffer(dev, buffer, TX_END); 239 ether3_setbuffer(dev, buffer_write, RX_START); 240 ether3_writebuffer(dev, buffer + RX_START, RX_LEN); 241 memset(buffer, byte ^ 0xff, RX_END); 242 ether3_setbuffer(dev, buffer_read, 0); 243 ether3_readbuffer(dev, buffer, TX_END); 244 ether3_setbuffer(dev, buffer_read, RX_START); 245 ether3_readbuffer(dev, buffer + RX_START, RX_LEN); 246 247 for (i = 0; i < RX_END; i++) { 248 if (buffer[i] != byte) { 249 if (max_errors > 0 && bad != buffer[i]) { 250 printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X", 251 dev->name, buffer[i], byte, i); 252 ret = 2; 253 max_errors--; 254 bad = i; 255 } 256 } else { 257 if (bad != -1) { 258 if (bad != i - 1) 259 printk(" - 0x%04X\n", i - 1); 260 printk("\n"); 261 bad = -1; 262 } 263 } 264 } 265 if (bad != -1) 266 printk(" - 0xffff\n"); 267 kfree(buffer); 268 269 return ret; 270} 271 272/* ------------------------------------------------------------------------------- */ 273 274static int __devinit ether3_init_2(struct net_device *dev) 275{ 276 int i; 277 278 priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8; 279 priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC; 280 priv(dev)->regs.command = 0; 281 282 /* 283 * Set up our hardware address 284 */ 285 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); 286 for (i = 0; i < 6; i++) 287 ether3_outb(dev->dev_addr[i], REG_BUFWIN); 288 289 if (dev->flags & IFF_PROMISC) 290 priv(dev)->regs.config1 |= CFG1_RECVPROMISC; 291 else if (dev->flags & IFF_MULTICAST) 292 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; 293 else 294 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; 295 296 /* 297 * There is a problem with the NQ8005 in that it occasionally loses the 298 * last two bytes. To get round this problem, we receive the CRC as 299 * well. That way, if we do lose the last two, then it doesn't matter. 300 */ 301 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); 302 ether3_outw((TX_END>>8) - 1, REG_BUFWIN); 303 ether3_outw(priv(dev)->rx_head, REG_RECVPTR); 304 ether3_outw(0, REG_TRANSMITPTR); 305 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); 306 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); 307 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 308 ether3_outw(priv(dev)->regs.command, REG_COMMAND); 309 310 i = ether3_ramtest(dev, 0x5A); 311 if(i) 312 return i; 313 i = ether3_ramtest(dev, 0x1E); 314 if(i) 315 return i; 316 317 ether3_setbuffer(dev, buffer_write, 0); 318 ether3_writelong(dev, 0); 319 return 0; 320} 321 322static void 323ether3_init_for_open(struct net_device *dev) 324{ 325 int i; 326 327 memset(&priv(dev)->stats, 0, sizeof(struct net_device_stats)); 328 329 /* Reset the chip */ 330 ether3_outw(CFG2_RESET, REG_CONFIG2); 331 udelay(4); 332 333 priv(dev)->regs.command = 0; 334 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); 335 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) 336 barrier(); 337 338 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); 339 for (i = 0; i < 6; i++) 340 ether3_outb(dev->dev_addr[i], REG_BUFWIN); 341 342 priv(dev)->tx_head = 0; 343 priv(dev)->tx_tail = 0; 344 priv(dev)->regs.config2 |= CFG2_CTRLO; 345 priv(dev)->rx_head = RX_START; 346 347 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); 348 ether3_outw((TX_END>>8) - 1, REG_BUFWIN); 349 ether3_outw(priv(dev)->rx_head, REG_RECVPTR); 350 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); 351 ether3_outw(0, REG_TRANSMITPTR); 352 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); 353 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 354 355 ether3_setbuffer(dev, buffer_write, 0); 356 ether3_writelong(dev, 0); 357 358 priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX; 359 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); 360} 361 362static inline int 363ether3_probe_bus_8(struct net_device *dev, int val) 364{ 365 int write_low, write_high, read_low, read_high; 366 367 write_low = val & 255; 368 write_high = val >> 8; 369 370 printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low); 371 372 ether3_outb(write_low, REG_RECVPTR); 373 ether3_outb(write_high, REG_RECVPTR + 4); 374 375 read_low = ether3_inb(REG_RECVPTR); 376 read_high = ether3_inb(REG_RECVPTR + 4); 377 378 printk(", read8 [%02X:%02X]\n", read_high, read_low); 379 380 return read_low == write_low && read_high == write_high; 381} 382 383static inline int 384ether3_probe_bus_16(struct net_device *dev, int val) 385{ 386 int read_val; 387 388 ether3_outw(val, REG_RECVPTR); 389 read_val = ether3_inw(REG_RECVPTR); 390 391 printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val); 392 393 return read_val == val; 394} 395 396/* 397 * Open/initialize the board. This is called (in the current kernel) 398 * sometime after booting when the 'ifconfig' program is run. 399 * 400 * This routine should set everything up anew at each open, even 401 * registers that "should" only need to be set once at boot, so that 402 * there is non-reboot way to recover if something goes wrong. 403 */ 404static int 405ether3_open(struct net_device *dev) 406{ 407 if (!is_valid_ether_addr(dev->dev_addr)) { 408 printk(KERN_WARNING "%s: invalid ethernet MAC address\n", 409 dev->name); 410 return -EINVAL; 411 } 412 413 if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev)) 414 return -EAGAIN; 415 416 ether3_init_for_open(dev); 417 418 netif_start_queue(dev); 419 420 return 0; 421} 422 423/* 424 * The inverse routine to ether3_open(). 425 */ 426static int 427ether3_close(struct net_device *dev) 428{ 429 netif_stop_queue(dev); 430 431 disable_irq(dev->irq); 432 433 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); 434 priv(dev)->regs.command = 0; 435 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) 436 barrier(); 437 ether3_outb(0x80, REG_CONFIG2 + 4); 438 ether3_outw(0, REG_COMMAND); 439 440 free_irq(dev->irq, dev); 441 442 return 0; 443} 444 445/* 446 * Get the current statistics. This may be called with the card open or 447 * closed. 448 */ 449static struct net_device_stats *ether3_getstats(struct net_device *dev) 450{ 451 return &priv(dev)->stats; 452} 453 454/* 455 * Set or clear promiscuous/multicast mode filter for this adaptor. 456 * 457 * We don't attempt any packet filtering. The card may have a SEEQ 8004 458 * in which does not have the other ethernet address registers present... 459 */ 460static void ether3_setmulticastlist(struct net_device *dev) 461{ 462 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC; 463 464 if (dev->flags & IFF_PROMISC) { 465 /* promiscuous mode */ 466 priv(dev)->regs.config1 |= CFG1_RECVPROMISC; 467 } else if (dev->flags & IFF_ALLMULTI) { 468 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; 469 } else 470 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; 471 472 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 473} 474 475static void ether3_timeout(struct net_device *dev) 476{ 477 unsigned long flags; 478 479 del_timer(&priv(dev)->timer); 480 481 local_irq_save(flags); 482 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name); 483 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name, 484 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2)); 485 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name, 486 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR)); 487 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name, 488 priv(dev)->tx_head, priv(dev)->tx_tail); 489 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail); 490 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev)); 491 local_irq_restore(flags); 492 493 priv(dev)->regs.config2 |= CFG2_CTRLO; 494 priv(dev)->stats.tx_errors += 1; 495 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); 496 priv(dev)->tx_head = priv(dev)->tx_tail = 0; 497 498 netif_wake_queue(dev); 499} 500 501/* 502 * Transmit a packet 503 */ 504static int 505ether3_sendpacket(struct sk_buff *skb, struct net_device *dev) 506{ 507 unsigned long flags; 508 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; 509 unsigned int ptr, next_ptr; 510 511 if (priv(dev)->broken) { 512 dev_kfree_skb(skb); 513 priv(dev)->stats.tx_dropped ++; 514 netif_start_queue(dev); 515 return 0; 516 } 517 518 length = (length + 1) & ~1; 519 if (length != skb->len) { 520 if (skb_padto(skb, length)) 521 goto out; 522 } 523 524 next_ptr = (priv(dev)->tx_head + 1) & 15; 525 526 local_irq_save(flags); 527 528 if (priv(dev)->tx_tail == next_ptr) { 529 local_irq_restore(flags); 530 return 1; /* unable to queue */ 531 } 532 533 dev->trans_start = jiffies; 534 ptr = 0x600 * priv(dev)->tx_head; 535 priv(dev)->tx_head = next_ptr; 536 next_ptr *= 0x600; 537 538#define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS) 539 540 ether3_setbuffer(dev, buffer_write, next_ptr); 541 ether3_writelong(dev, 0); 542 ether3_setbuffer(dev, buffer_write, ptr); 543 ether3_writelong(dev, 0); 544 ether3_writebuffer(dev, skb->data, length); 545 ether3_writeword(dev, htons(next_ptr)); 546 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16); 547 ether3_setbuffer(dev, buffer_write, ptr); 548 ether3_writeword(dev, htons((ptr + length + 4))); 549 ether3_writeword(dev, TXHDR_FLAGS >> 16); 550 ether3_ledon(dev); 551 552 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) { 553 ether3_outw(ptr, REG_TRANSMITPTR); 554 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND); 555 } 556 557 next_ptr = (priv(dev)->tx_head + 1) & 15; 558 local_irq_restore(flags); 559 560 dev_kfree_skb(skb); 561 562 if (priv(dev)->tx_tail == next_ptr) 563 netif_stop_queue(dev); 564 565 out: 566 return 0; 567} 568 569static irqreturn_t 570ether3_interrupt(int irq, void *dev_id) 571{ 572 struct net_device *dev = (struct net_device *)dev_id; 573 unsigned int status, handled = IRQ_NONE; 574 575#if NET_DEBUG > 1 576 if(net_debug & DEBUG_INT) 577 printk("eth3irq: %d ", irq); 578#endif 579 580 status = ether3_inw(REG_STATUS); 581 582 if (status & STAT_INTRX) { 583 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND); 584 ether3_rx(dev, 12); 585 handled = IRQ_HANDLED; 586 } 587 588 if (status & STAT_INTTX) { 589 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND); 590 ether3_tx(dev); 591 handled = IRQ_HANDLED; 592 } 593 594#if NET_DEBUG > 1 595 if(net_debug & DEBUG_INT) 596 printk("done\n"); 597#endif 598 return handled; 599} 600 601/* 602 * If we have a good packet(s), get it/them out of the buffers. 603 */ 604static int ether3_rx(struct net_device *dev, unsigned int maxcnt) 605{ 606 unsigned int next_ptr = priv(dev)->rx_head, received = 0; 607 608 ether3_ledon(dev); 609 610 do { 611 unsigned int this_ptr, status; 612 unsigned char addrs[16]; 613 614 /* 615 * read the first 16 bytes from the buffer. 616 * This contains the status bytes etc and ethernet addresses, 617 * and we also check the source ethernet address to see if 618 * it originated from us. 619 */ 620 { 621 unsigned int temp_ptr; 622 ether3_setbuffer(dev, buffer_read, next_ptr); 623 temp_ptr = ether3_readword(dev); 624 status = ether3_readword(dev); 625 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) != 626 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr) 627 break; 628 629 this_ptr = next_ptr + 4; 630 next_ptr = ntohs(temp_ptr); 631 } 632 ether3_setbuffer(dev, buffer_read, this_ptr); 633 ether3_readbuffer(dev, addrs+2, 12); 634 635if (next_ptr < RX_START || next_ptr >= RX_END) { 636 int i; 637 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head); 638 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8); 639 for (i = 2; i < 14; i++) 640 printk("%02X ", addrs[i]); 641 printk("\n"); 642 next_ptr = priv(dev)->rx_head; 643 break; 644} 645 /* 646 * ignore our own packets... 647 */ 648 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) && 649 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) { 650 maxcnt ++; /* compensate for loopedback packet */ 651 ether3_outw(next_ptr >> 8, REG_RECVEND); 652 } else 653 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) { 654 unsigned int length = next_ptr - this_ptr; 655 struct sk_buff *skb; 656 657 if (next_ptr <= this_ptr) 658 length += RX_END - RX_START; 659 660 skb = dev_alloc_skb(length + 2); 661 if (skb) { 662 unsigned char *buf; 663 664 skb_reserve(skb, 2); 665 buf = skb_put(skb, length); 666 ether3_readbuffer(dev, buf + 12, length - 12); 667 ether3_outw(next_ptr >> 8, REG_RECVEND); 668 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2); 669 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4); 670 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8); 671 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12); 672 skb->protocol = eth_type_trans(skb, dev); 673 netif_rx(skb); 674 received ++; 675 } else 676 goto dropping; 677 } else { 678 struct net_device_stats *stats = &priv(dev)->stats; 679 ether3_outw(next_ptr >> 8, REG_RECVEND); 680 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++; 681 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++; 682 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++; 683 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++; 684 stats->rx_errors++; 685 } 686 } 687 while (-- maxcnt); 688 689done: 690 priv(dev)->stats.rx_packets += received; 691 priv(dev)->rx_head = next_ptr; 692 /* 693 * If rx went off line, then that means that the buffer may be full. We 694 * have dropped at least one packet. 695 */ 696 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) { 697 priv(dev)->stats.rx_dropped ++; 698 ether3_outw(next_ptr, REG_RECVPTR); 699 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); 700 } 701 702 return maxcnt; 703 704dropping:{ 705 static unsigned long last_warned; 706 707 ether3_outw(next_ptr >> 8, REG_RECVEND); 708 /* 709 * Don't print this message too many times... 710 */ 711 if (time_after(jiffies, last_warned + 10 * HZ)) { 712 last_warned = jiffies; 713 printk("%s: memory squeeze, dropping packet.\n", dev->name); 714 } 715 priv(dev)->stats.rx_dropped ++; 716 goto done; 717 } 718} 719 720/* 721 * Update stats for the transmitted packet(s) 722 */ 723static void ether3_tx(struct net_device *dev) 724{ 725 unsigned int tx_tail = priv(dev)->tx_tail; 726 int max_work = 14; 727 728 do { 729 unsigned long status; 730 731 /* 732 * Read the packet header 733 */ 734 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600); 735 status = ether3_readlong(dev); 736 737 /* 738 * Check to see if this packet has been transmitted 739 */ 740 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) != 741 (TXSTAT_DONE | TXHDR_TRANSMIT)) 742 break; 743 744 /* 745 * Update errors 746 */ 747 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS))) 748 priv(dev)->stats.tx_packets++; 749 else { 750 priv(dev)->stats.tx_errors ++; 751 if (status & TXSTAT_16COLLISIONS) 752 priv(dev)->stats.collisions += 16; 753 if (status & TXSTAT_BABBLED) 754 priv(dev)->stats.tx_fifo_errors ++; 755 } 756 757 tx_tail = (tx_tail + 1) & 15; 758 } while (--max_work); 759 760 if (priv(dev)->tx_tail != tx_tail) { 761 priv(dev)->tx_tail = tx_tail; 762 netif_wake_queue(dev); 763 } 764} 765 766static void __devinit ether3_banner(void) 767{ 768 static unsigned version_printed = 0; 769 770 if (net_debug && version_printed++ == 0) 771 printk(KERN_INFO "%s", version); 772} 773 774static int __devinit 775ether3_probe(struct expansion_card *ec, const struct ecard_id *id) 776{ 777 const struct ether3_data *data = id->data; 778 struct net_device *dev; 779 int i, bus_type, ret; 780 781 ether3_banner(); 782 783 ret = ecard_request_resources(ec); 784 if (ret) 785 goto out; 786 787 dev = alloc_etherdev(sizeof(struct dev_priv)); 788 if (!dev) { 789 ret = -ENOMEM; 790 goto release; 791 } 792 793 SET_MODULE_OWNER(dev); 794 SET_NETDEV_DEV(dev, &ec->dev); 795 796 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); 797 if (!priv(dev)->base) { 798 ret = -ENOMEM; 799 goto free; 800 } 801 802 ec->irqaddr = priv(dev)->base + data->base_offset; 803 ec->irqmask = 0xf0; 804 805 priv(dev)->seeq = priv(dev)->base + data->base_offset; 806 dev->irq = ec->irq; 807 808 ether3_addr(dev->dev_addr, ec); 809 810 init_timer(&priv(dev)->timer); 811 812 /* Reset card... 813 */ 814 ether3_outb(0x80, REG_CONFIG2 + 4); 815 bus_type = BUS_UNKNOWN; 816 udelay(4); 817 818 /* Test using Receive Pointer (16-bit register) to find out 819 * how the ether3 is connected to the bus... 820 */ 821 if (ether3_probe_bus_8(dev, 0x100) && 822 ether3_probe_bus_8(dev, 0x201)) 823 bus_type = BUS_8; 824 825 if (bus_type == BUS_UNKNOWN && 826 ether3_probe_bus_16(dev, 0x101) && 827 ether3_probe_bus_16(dev, 0x201)) 828 bus_type = BUS_16; 829 830 switch (bus_type) { 831 case BUS_UNKNOWN: 832 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name); 833 ret = -ENODEV; 834 goto free; 835 836 case BUS_8: 837 printk(KERN_ERR "%s: %s found, but is an unsupported " 838 "8-bit card\n", dev->name, data->name); 839 ret = -ENODEV; 840 goto free; 841 842 default: 843 break; 844 } 845 846 if (ether3_init_2(dev)) { 847 ret = -ENODEV; 848 goto free; 849 } 850 851 dev->open = ether3_open; 852 dev->stop = ether3_close; 853 dev->hard_start_xmit = ether3_sendpacket; 854 dev->get_stats = ether3_getstats; 855 dev->set_multicast_list = ether3_setmulticastlist; 856 dev->tx_timeout = ether3_timeout; 857 dev->watchdog_timeo = 5 * HZ / 100; 858 859 ret = register_netdev(dev); 860 if (ret) 861 goto free; 862 863 printk("%s: %s in slot %d, ", dev->name, data->name, ec->slot_no); 864 for (i = 0; i < 6; i++) 865 printk("%2.2x%c", dev->dev_addr[i], i == 5 ? '\n' : ':'); 866 867 ecard_set_drvdata(ec, dev); 868 return 0; 869 870 free: 871 free_netdev(dev); 872 release: 873 ecard_release_resources(ec); 874 out: 875 return ret; 876} 877 878static void __devexit ether3_remove(struct expansion_card *ec) 879{ 880 struct net_device *dev = ecard_get_drvdata(ec); 881 882 ecard_set_drvdata(ec, NULL); 883 884 unregister_netdev(dev); 885 free_netdev(dev); 886 ecard_release_resources(ec); 887} 888 889static struct ether3_data ether3 = { 890 .name = "ether3", 891 .base_offset = 0, 892}; 893 894static struct ether3_data etherb = { 895 .name = "etherb", 896 .base_offset = 0x800, 897}; 898 899static const struct ecard_id ether3_ids[] = { 900 { MANU_ANT2, PROD_ANT_ETHER3, ðer3 }, 901 { MANU_ANT, PROD_ANT_ETHER3, ðer3 }, 902 { MANU_ANT, PROD_ANT_ETHERB, ðerb }, 903 { 0xffff, 0xffff } 904}; 905 906static struct ecard_driver ether3_driver = { 907 .probe = ether3_probe, 908 .remove = __devexit_p(ether3_remove), 909 .id_table = ether3_ids, 910 .drv = { 911 .name = "ether3", 912 }, 913}; 914 915static int __init ether3_init(void) 916{ 917 return ecard_register_driver(ðer3_driver); 918} 919 920static void __exit ether3_exit(void) 921{ 922 ecard_remove_driver(ðer3_driver); 923} 924 925module_init(ether3_init); 926module_exit(ether3_exit); 927 928MODULE_LICENSE("GPL"); 929