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