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/ecard.h> 68 #include <asm/io.h> 69 70 static char version[] = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n"; 71 72 #include "ether3.h" 73 74 static unsigned int net_debug = NET_DEBUG; 75 76 static void ether3_setmulticastlist(struct net_device *dev); 77 static int ether3_rx(struct net_device *dev, unsigned int maxcnt); 78 static void ether3_tx(struct net_device *dev); 79 static int ether3_open (struct net_device *dev); 80 static netdev_tx_t ether3_sendpacket(struct sk_buff *skb, 81 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, void __iomem *r) 104 { 105 writeb(v, r); 106 udelay(1); 107 } 108 109 static inline void ether3_outw(int v, 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(struct timer_list *t) 175 { 176 struct dev_priv *private = from_timer(private, t, timer); 177 struct net_device *dev = private->dev; 178 179 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2); 180 } 181 182 /* 183 * switch LED on... 184 */ 185 static 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 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 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 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 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 (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev)) 404 return -EAGAIN; 405 406 ether3_init_for_open(dev); 407 408 netif_start_queue(dev); 409 410 return 0; 411 } 412 413 /* 414 * The inverse routine to ether3_open(). 415 */ 416 static int 417 ether3_close(struct net_device *dev) 418 { 419 netif_stop_queue(dev); 420 421 disable_irq(dev->irq); 422 423 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); 424 priv(dev)->regs.command = 0; 425 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) 426 barrier(); 427 ether3_outb(0x80, REG_CONFIG2 + 4); 428 ether3_outw(0, REG_COMMAND); 429 430 free_irq(dev->irq, dev); 431 432 return 0; 433 } 434 435 /* 436 * Set or clear promiscuous/multicast mode filter for this adaptor. 437 * 438 * We don't attempt any packet filtering. The card may have a SEEQ 8004 439 * in which does not have the other ethernet address registers present... 440 */ 441 static void ether3_setmulticastlist(struct net_device *dev) 442 { 443 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC; 444 445 if (dev->flags & IFF_PROMISC) { 446 /* promiscuous mode */ 447 priv(dev)->regs.config1 |= CFG1_RECVPROMISC; 448 } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) { 449 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; 450 } else 451 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; 452 453 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 454 } 455 456 static void ether3_timeout(struct net_device *dev) 457 { 458 unsigned long flags; 459 460 del_timer(&priv(dev)->timer); 461 462 local_irq_save(flags); 463 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name); 464 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name, 465 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2)); 466 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name, 467 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR)); 468 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name, 469 priv(dev)->tx_head, priv(dev)->tx_tail); 470 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail); 471 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev)); 472 local_irq_restore(flags); 473 474 priv(dev)->regs.config2 |= CFG2_CTRLO; 475 dev->stats.tx_errors += 1; 476 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); 477 priv(dev)->tx_head = priv(dev)->tx_tail = 0; 478 479 netif_wake_queue(dev); 480 } 481 482 /* 483 * Transmit a packet 484 */ 485 static netdev_tx_t 486 ether3_sendpacket(struct sk_buff *skb, struct net_device *dev) 487 { 488 unsigned long flags; 489 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; 490 unsigned int ptr, next_ptr; 491 492 if (priv(dev)->broken) { 493 dev_kfree_skb(skb); 494 dev->stats.tx_dropped++; 495 netif_start_queue(dev); 496 return NETDEV_TX_OK; 497 } 498 499 length = (length + 1) & ~1; 500 if (length != skb->len) { 501 if (skb_padto(skb, length)) 502 goto out; 503 } 504 505 next_ptr = (priv(dev)->tx_head + 1) & 15; 506 507 local_irq_save(flags); 508 509 if (priv(dev)->tx_tail == next_ptr) { 510 local_irq_restore(flags); 511 return NETDEV_TX_BUSY; /* unable to queue */ 512 } 513 514 ptr = 0x600 * priv(dev)->tx_head; 515 priv(dev)->tx_head = next_ptr; 516 next_ptr *= 0x600; 517 518 #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS) 519 520 ether3_setbuffer(dev, buffer_write, next_ptr); 521 ether3_writelong(dev, 0); 522 ether3_setbuffer(dev, buffer_write, ptr); 523 ether3_writelong(dev, 0); 524 ether3_writebuffer(dev, skb->data, length); 525 ether3_writeword(dev, htons(next_ptr)); 526 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16); 527 ether3_setbuffer(dev, buffer_write, ptr); 528 ether3_writeword(dev, htons((ptr + length + 4))); 529 ether3_writeword(dev, TXHDR_FLAGS >> 16); 530 ether3_ledon(dev); 531 532 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) { 533 ether3_outw(ptr, REG_TRANSMITPTR); 534 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND); 535 } 536 537 next_ptr = (priv(dev)->tx_head + 1) & 15; 538 local_irq_restore(flags); 539 540 dev_kfree_skb(skb); 541 542 if (priv(dev)->tx_tail == next_ptr) 543 netif_stop_queue(dev); 544 545 out: 546 return NETDEV_TX_OK; 547 } 548 549 static irqreturn_t 550 ether3_interrupt(int irq, void *dev_id) 551 { 552 struct net_device *dev = (struct net_device *)dev_id; 553 unsigned int status, handled = IRQ_NONE; 554 555 #if NET_DEBUG > 1 556 if(net_debug & DEBUG_INT) 557 printk("eth3irq: %d ", irq); 558 #endif 559 560 status = ether3_inw(REG_STATUS); 561 562 if (status & STAT_INTRX) { 563 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND); 564 ether3_rx(dev, 12); 565 handled = IRQ_HANDLED; 566 } 567 568 if (status & STAT_INTTX) { 569 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND); 570 ether3_tx(dev); 571 handled = IRQ_HANDLED; 572 } 573 574 #if NET_DEBUG > 1 575 if(net_debug & DEBUG_INT) 576 printk("done\n"); 577 #endif 578 return handled; 579 } 580 581 /* 582 * If we have a good packet(s), get it/them out of the buffers. 583 */ 584 static int ether3_rx(struct net_device *dev, unsigned int maxcnt) 585 { 586 unsigned int next_ptr = priv(dev)->rx_head, received = 0; 587 588 ether3_ledon(dev); 589 590 do { 591 unsigned int this_ptr, status; 592 unsigned char addrs[16]; 593 594 /* 595 * read the first 16 bytes from the buffer. 596 * This contains the status bytes etc and ethernet addresses, 597 * and we also check the source ethernet address to see if 598 * it originated from us. 599 */ 600 { 601 unsigned int temp_ptr; 602 ether3_setbuffer(dev, buffer_read, next_ptr); 603 temp_ptr = ether3_readword(dev); 604 status = ether3_readword(dev); 605 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) != 606 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr) 607 break; 608 609 this_ptr = next_ptr + 4; 610 next_ptr = ntohs(temp_ptr); 611 } 612 ether3_setbuffer(dev, buffer_read, this_ptr); 613 ether3_readbuffer(dev, addrs+2, 12); 614 615 if (next_ptr < RX_START || next_ptr >= RX_END) { 616 int i; 617 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head); 618 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8); 619 for (i = 2; i < 14; i++) 620 printk("%02X ", addrs[i]); 621 printk("\n"); 622 next_ptr = priv(dev)->rx_head; 623 break; 624 } 625 /* 626 * ignore our own packets... 627 */ 628 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) && 629 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) { 630 maxcnt ++; /* compensate for loopedback packet */ 631 ether3_outw(next_ptr >> 8, REG_RECVEND); 632 } else 633 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) { 634 unsigned int length = next_ptr - this_ptr; 635 struct sk_buff *skb; 636 637 if (next_ptr <= this_ptr) 638 length += RX_END - RX_START; 639 640 skb = netdev_alloc_skb(dev, length + 2); 641 if (skb) { 642 unsigned char *buf; 643 644 skb_reserve(skb, 2); 645 buf = skb_put(skb, length); 646 ether3_readbuffer(dev, buf + 12, length - 12); 647 ether3_outw(next_ptr >> 8, REG_RECVEND); 648 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2); 649 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4); 650 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8); 651 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12); 652 skb->protocol = eth_type_trans(skb, dev); 653 netif_rx(skb); 654 received ++; 655 } else { 656 ether3_outw(next_ptr >> 8, REG_RECVEND); 657 dev->stats.rx_dropped++; 658 goto done; 659 } 660 } else { 661 struct net_device_stats *stats = &dev->stats; 662 ether3_outw(next_ptr >> 8, REG_RECVEND); 663 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++; 664 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++; 665 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++; 666 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++; 667 stats->rx_errors++; 668 } 669 } 670 while (-- maxcnt); 671 672 done: 673 dev->stats.rx_packets += received; 674 priv(dev)->rx_head = next_ptr; 675 /* 676 * If rx went off line, then that means that the buffer may be full. We 677 * have dropped at least one packet. 678 */ 679 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) { 680 dev->stats.rx_dropped++; 681 ether3_outw(next_ptr, REG_RECVPTR); 682 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); 683 } 684 685 return maxcnt; 686 } 687 688 /* 689 * Update stats for the transmitted packet(s) 690 */ 691 static void ether3_tx(struct net_device *dev) 692 { 693 unsigned int tx_tail = priv(dev)->tx_tail; 694 int max_work = 14; 695 696 do { 697 unsigned long status; 698 699 /* 700 * Read the packet header 701 */ 702 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600); 703 status = ether3_readlong(dev); 704 705 /* 706 * Check to see if this packet has been transmitted 707 */ 708 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) != 709 (TXSTAT_DONE | TXHDR_TRANSMIT)) 710 break; 711 712 /* 713 * Update errors 714 */ 715 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS))) 716 dev->stats.tx_packets++; 717 else { 718 dev->stats.tx_errors++; 719 if (status & TXSTAT_16COLLISIONS) 720 dev->stats.collisions += 16; 721 if (status & TXSTAT_BABBLED) 722 dev->stats.tx_fifo_errors++; 723 } 724 725 tx_tail = (tx_tail + 1) & 15; 726 } while (--max_work); 727 728 if (priv(dev)->tx_tail != tx_tail) { 729 priv(dev)->tx_tail = tx_tail; 730 netif_wake_queue(dev); 731 } 732 } 733 734 static void ether3_banner(void) 735 { 736 static unsigned version_printed = 0; 737 738 if (net_debug && version_printed++ == 0) 739 printk(KERN_INFO "%s", version); 740 } 741 742 static const struct net_device_ops ether3_netdev_ops = { 743 .ndo_open = ether3_open, 744 .ndo_stop = ether3_close, 745 .ndo_start_xmit = ether3_sendpacket, 746 .ndo_set_rx_mode = ether3_setmulticastlist, 747 .ndo_tx_timeout = ether3_timeout, 748 .ndo_validate_addr = eth_validate_addr, 749 .ndo_set_mac_address = eth_mac_addr, 750 }; 751 752 static int 753 ether3_probe(struct expansion_card *ec, const struct ecard_id *id) 754 { 755 const struct ether3_data *data = id->data; 756 struct net_device *dev; 757 int bus_type, ret; 758 759 ether3_banner(); 760 761 ret = ecard_request_resources(ec); 762 if (ret) 763 goto out; 764 765 dev = alloc_etherdev(sizeof(struct dev_priv)); 766 if (!dev) { 767 ret = -ENOMEM; 768 goto release; 769 } 770 771 SET_NETDEV_DEV(dev, &ec->dev); 772 773 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); 774 if (!priv(dev)->base) { 775 ret = -ENOMEM; 776 goto free; 777 } 778 779 ec->irqaddr = priv(dev)->base + data->base_offset; 780 ec->irqmask = 0xf0; 781 782 priv(dev)->seeq = priv(dev)->base + data->base_offset; 783 dev->irq = ec->irq; 784 785 ether3_addr(dev->dev_addr, ec); 786 787 priv(dev)->dev = dev; 788 timer_setup(&priv(dev)->timer, ether3_ledoff, 0); 789 790 /* Reset card... 791 */ 792 ether3_outb(0x80, REG_CONFIG2 + 4); 793 bus_type = BUS_UNKNOWN; 794 udelay(4); 795 796 /* Test using Receive Pointer (16-bit register) to find out 797 * how the ether3 is connected to the bus... 798 */ 799 if (ether3_probe_bus_8(dev, 0x100) && 800 ether3_probe_bus_8(dev, 0x201)) 801 bus_type = BUS_8; 802 803 if (bus_type == BUS_UNKNOWN && 804 ether3_probe_bus_16(dev, 0x101) && 805 ether3_probe_bus_16(dev, 0x201)) 806 bus_type = BUS_16; 807 808 switch (bus_type) { 809 case BUS_UNKNOWN: 810 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name); 811 ret = -ENODEV; 812 goto free; 813 814 case BUS_8: 815 printk(KERN_ERR "%s: %s found, but is an unsupported " 816 "8-bit card\n", dev->name, data->name); 817 ret = -ENODEV; 818 goto free; 819 820 default: 821 break; 822 } 823 824 if (ether3_init_2(dev)) { 825 ret = -ENODEV; 826 goto free; 827 } 828 829 dev->netdev_ops = ðer3_netdev_ops; 830 dev->watchdog_timeo = 5 * HZ / 100; 831 832 ret = register_netdev(dev); 833 if (ret) 834 goto free; 835 836 printk("%s: %s in slot %d, %pM\n", 837 dev->name, data->name, ec->slot_no, dev->dev_addr); 838 839 ecard_set_drvdata(ec, dev); 840 return 0; 841 842 free: 843 free_netdev(dev); 844 release: 845 ecard_release_resources(ec); 846 out: 847 return ret; 848 } 849 850 static void ether3_remove(struct expansion_card *ec) 851 { 852 struct net_device *dev = ecard_get_drvdata(ec); 853 854 ecard_set_drvdata(ec, NULL); 855 856 unregister_netdev(dev); 857 free_netdev(dev); 858 ecard_release_resources(ec); 859 } 860 861 static struct ether3_data ether3 = { 862 .name = "ether3", 863 .base_offset = 0, 864 }; 865 866 static struct ether3_data etherb = { 867 .name = "etherb", 868 .base_offset = 0x800, 869 }; 870 871 static const struct ecard_id ether3_ids[] = { 872 { MANU_ANT2, PROD_ANT_ETHER3, ðer3 }, 873 { MANU_ANT, PROD_ANT_ETHER3, ðer3 }, 874 { MANU_ANT, PROD_ANT_ETHERB, ðerb }, 875 { 0xffff, 0xffff } 876 }; 877 878 static struct ecard_driver ether3_driver = { 879 .probe = ether3_probe, 880 .remove = ether3_remove, 881 .id_table = ether3_ids, 882 .drv = { 883 .name = "ether3", 884 }, 885 }; 886 887 static int __init ether3_init(void) 888 { 889 return ecard_register_driver(ðer3_driver); 890 } 891 892 static void __exit ether3_exit(void) 893 { 894 ecard_remove_driver(ðer3_driver); 895 } 896 897 module_init(ether3_init); 898 module_exit(ether3_exit); 899 900 MODULE_LICENSE("GPL"); 901