1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/drivers/acorn/net/ether3.c 4 * 5 * Copyright (C) 1995-2000 Russell King 6 * 7 * SEEQ nq8005 ethernet driver for Acorn/ANT Ether3 card 8 * for Acorn machines 9 * 10 * By Russell King, with some suggestions from borris@ant.co.uk 11 * 12 * Changelog: 13 * 1.04 RMK 29/02/1996 Won't pass packets that are from our ethernet 14 * address up to the higher levels - they're 15 * silently ignored. I/F can now be put into 16 * multicast mode. Receiver routine optimised. 17 * 1.05 RMK 30/02/1996 Now claims interrupt at open when part of 18 * the kernel rather than when a module. 19 * 1.06 RMK 02/03/1996 Various code cleanups 20 * 1.07 RMK 13/10/1996 Optimised interrupt routine and transmit 21 * routines. 22 * 1.08 RMK 14/10/1996 Fixed problem with too many packets, 23 * prevented the kernel message about dropped 24 * packets appearing too many times a second. 25 * Now does not disable all IRQs, only the IRQ 26 * used by this card. 27 * 1.09 RMK 10/11/1996 Only enables TX irq when buffer space is low, 28 * but we still service the TX queue if we get a 29 * RX interrupt. 30 * 1.10 RMK 15/07/1997 Fixed autoprobing of NQ8004. 31 * 1.11 RMK 16/11/1997 Fixed autoprobing of NQ8005A. 32 * 1.12 RMK 31/12/1997 Removed reference to dev_tint for Linux 2.1. 33 * RMK 27/06/1998 Changed asm/delay.h to linux/delay.h. 34 * 1.13 RMK 29/06/1998 Fixed problem with transmission of packets. 35 * Chip seems to have a bug in, whereby if the 36 * packet starts two bytes from the end of the 37 * buffer, it corrupts the receiver chain, and 38 * never updates the transmit status correctly. 39 * 1.14 RMK 07/01/1998 Added initial code for ETHERB addressing. 40 * 1.15 RMK 30/04/1999 More fixes to the transmit routine for buggy 41 * hardware. 42 * 1.16 RMK 10/02/2000 Updated for 2.3.43 43 * 1.17 RMK 13/05/2000 Updated for 2.3.99-pre8 44 */ 45 46 #include <linux/module.h> 47 #include <linux/kernel.h> 48 #include <linux/types.h> 49 #include <linux/fcntl.h> 50 #include <linux/interrupt.h> 51 #include <linux/ioport.h> 52 #include <linux/in.h> 53 #include <linux/slab.h> 54 #include <linux/string.h> 55 #include <linux/errno.h> 56 #include <linux/netdevice.h> 57 #include <linux/etherdevice.h> 58 #include <linux/skbuff.h> 59 #include <linux/device.h> 60 #include <linux/init.h> 61 #include <linux/delay.h> 62 #include <linux/bitops.h> 63 64 #include <asm/ecard.h> 65 #include <asm/io.h> 66 67 static char version[] = "ether3 ethernet driver (c) 1995-2000 R.M.King v1.17\n"; 68 69 #include "ether3.h" 70 71 static unsigned int net_debug = NET_DEBUG; 72 73 static void ether3_setmulticastlist(struct net_device *dev); 74 static int ether3_rx(struct net_device *dev, unsigned int maxcnt); 75 static void ether3_tx(struct net_device *dev); 76 static int ether3_open (struct net_device *dev); 77 static netdev_tx_t ether3_sendpacket(struct sk_buff *skb, 78 struct net_device *dev); 79 static irqreturn_t ether3_interrupt (int irq, void *dev_id); 80 static int ether3_close (struct net_device *dev); 81 static void ether3_setmulticastlist (struct net_device *dev); 82 static void ether3_timeout(struct net_device *dev); 83 84 #define BUS_16 2 85 #define BUS_8 1 86 #define BUS_UNKNOWN 0 87 88 /* --------------------------------------------------------------------------- */ 89 90 typedef enum { 91 buffer_write, 92 buffer_read 93 } buffer_rw_t; 94 95 /* 96 * ether3 read/write. Slow things down a bit... 97 * The SEEQ8005 doesn't like us writing to its registers 98 * too quickly. 99 */ 100 static inline void ether3_outb(int v, void __iomem *r) 101 { 102 writeb(v, r); 103 udelay(1); 104 } 105 106 static inline void ether3_outw(int v, void __iomem *r) 107 { 108 writew(v, r); 109 udelay(1); 110 } 111 #define ether3_inb(r) ({ unsigned int __v = readb((r)); udelay(1); __v; }) 112 #define ether3_inw(r) ({ unsigned int __v = readw((r)); udelay(1); __v; }) 113 114 static int 115 ether3_setbuffer(struct net_device *dev, buffer_rw_t read, int start) 116 { 117 int timeout = 1000; 118 119 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 120 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); 121 122 while ((ether3_inw(REG_STATUS) & STAT_FIFOEMPTY) == 0) { 123 if (!timeout--) { 124 printk("%s: setbuffer broken\n", dev->name); 125 priv(dev)->broken = 1; 126 return 1; 127 } 128 udelay(1); 129 } 130 131 if (read == buffer_read) { 132 ether3_outw(start, REG_DMAADDR); 133 ether3_outw(priv(dev)->regs.command | CMD_FIFOREAD, REG_COMMAND); 134 } else { 135 ether3_outw(priv(dev)->regs.command | CMD_FIFOWRITE, REG_COMMAND); 136 ether3_outw(start, REG_DMAADDR); 137 } 138 return 0; 139 } 140 141 /* 142 * write data to the buffer memory 143 */ 144 #define ether3_writebuffer(dev,data,length) \ 145 writesw(REG_BUFWIN, (data), (length) >> 1) 146 147 #define ether3_writeword(dev,data) \ 148 writew((data), REG_BUFWIN) 149 150 #define ether3_writelong(dev,data) { \ 151 void __iomem *reg_bufwin = REG_BUFWIN; \ 152 writew((data), reg_bufwin); \ 153 writew((data) >> 16, reg_bufwin); \ 154 } 155 156 /* 157 * read data from the buffer memory 158 */ 159 #define ether3_readbuffer(dev,data,length) \ 160 readsw(REG_BUFWIN, (data), (length) >> 1) 161 162 #define ether3_readword(dev) \ 163 readw(REG_BUFWIN) 164 165 #define ether3_readlong(dev) \ 166 readw(REG_BUFWIN) | (readw(REG_BUFWIN) << 16) 167 168 /* 169 * Switch LED off... 170 */ 171 static void ether3_ledoff(struct timer_list *t) 172 { 173 struct dev_priv *private = from_timer(private, t, timer); 174 struct net_device *dev = private->dev; 175 176 ether3_outw(priv(dev)->regs.config2 |= CFG2_CTRLO, REG_CONFIG2); 177 } 178 179 /* 180 * switch LED on... 181 */ 182 static inline void ether3_ledon(struct net_device *dev) 183 { 184 del_timer(&priv(dev)->timer); 185 priv(dev)->timer.expires = jiffies + HZ / 50; /* leave on for 1/50th second */ 186 add_timer(&priv(dev)->timer); 187 if (priv(dev)->regs.config2 & CFG2_CTRLO) 188 ether3_outw(priv(dev)->regs.config2 &= ~CFG2_CTRLO, REG_CONFIG2); 189 } 190 191 /* 192 * Read the ethernet address string from the on board rom. 193 * This is an ascii string!!! 194 */ 195 static int 196 ether3_addr(char *addr, struct expansion_card *ec) 197 { 198 struct in_chunk_dir cd; 199 char *s; 200 201 if (ecard_readchunk(&cd, ec, 0xf5, 0) && (s = strchr(cd.d.string, '('))) { 202 int i; 203 for (i = 0; i<6; i++) { 204 addr[i] = simple_strtoul(s + 1, &s, 0x10); 205 if (*s != (i==5?')' : ':' )) 206 break; 207 } 208 if (i == 6) 209 return 0; 210 } 211 /* I wonder if we should even let the user continue in this case 212 * - no, it would be better to disable the device 213 */ 214 printk(KERN_ERR "ether3: Couldn't read a valid MAC address from card.\n"); 215 return -ENODEV; 216 } 217 218 /* --------------------------------------------------------------------------- */ 219 220 static int 221 ether3_ramtest(struct net_device *dev, unsigned char byte) 222 { 223 unsigned char *buffer = kmalloc(RX_END, GFP_KERNEL); 224 int i,ret = 0; 225 int max_errors = 4; 226 int bad = -1; 227 228 if (!buffer) 229 return 1; 230 231 memset(buffer, byte, RX_END); 232 ether3_setbuffer(dev, buffer_write, 0); 233 ether3_writebuffer(dev, buffer, TX_END); 234 ether3_setbuffer(dev, buffer_write, RX_START); 235 ether3_writebuffer(dev, buffer + RX_START, RX_LEN); 236 memset(buffer, byte ^ 0xff, RX_END); 237 ether3_setbuffer(dev, buffer_read, 0); 238 ether3_readbuffer(dev, buffer, TX_END); 239 ether3_setbuffer(dev, buffer_read, RX_START); 240 ether3_readbuffer(dev, buffer + RX_START, RX_LEN); 241 242 for (i = 0; i < RX_END; i++) { 243 if (buffer[i] != byte) { 244 if (max_errors > 0 && bad != buffer[i]) { 245 printk("%s: RAM failed with (%02X instead of %02X) at 0x%04X", 246 dev->name, buffer[i], byte, i); 247 ret = 2; 248 max_errors--; 249 bad = i; 250 } 251 } else { 252 if (bad != -1) { 253 if (bad != i - 1) 254 printk(" - 0x%04X\n", i - 1); 255 printk("\n"); 256 bad = -1; 257 } 258 } 259 } 260 if (bad != -1) 261 printk(" - 0xffff\n"); 262 kfree(buffer); 263 264 return ret; 265 } 266 267 /* ------------------------------------------------------------------------------- */ 268 269 static int ether3_init_2(struct net_device *dev) 270 { 271 int i; 272 273 priv(dev)->regs.config1 = CFG1_RECVCOMPSTAT0|CFG1_DMABURST8; 274 priv(dev)->regs.config2 = CFG2_CTRLO|CFG2_RECVCRC|CFG2_ERRENCRC; 275 priv(dev)->regs.command = 0; 276 277 /* 278 * Set up our hardware address 279 */ 280 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); 281 for (i = 0; i < 6; i++) 282 ether3_outb(dev->dev_addr[i], REG_BUFWIN); 283 284 if (dev->flags & IFF_PROMISC) 285 priv(dev)->regs.config1 |= CFG1_RECVPROMISC; 286 else if (dev->flags & IFF_MULTICAST) 287 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; 288 else 289 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; 290 291 /* 292 * There is a problem with the NQ8005 in that it occasionally loses the 293 * last two bytes. To get round this problem, we receive the CRC as 294 * well. That way, if we do lose the last two, then it doesn't matter. 295 */ 296 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); 297 ether3_outw((TX_END>>8) - 1, REG_BUFWIN); 298 ether3_outw(priv(dev)->rx_head, REG_RECVPTR); 299 ether3_outw(0, REG_TRANSMITPTR); 300 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); 301 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); 302 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 303 ether3_outw(priv(dev)->regs.command, REG_COMMAND); 304 305 i = ether3_ramtest(dev, 0x5A); 306 if(i) 307 return i; 308 i = ether3_ramtest(dev, 0x1E); 309 if(i) 310 return i; 311 312 ether3_setbuffer(dev, buffer_write, 0); 313 ether3_writelong(dev, 0); 314 return 0; 315 } 316 317 static void 318 ether3_init_for_open(struct net_device *dev) 319 { 320 int i; 321 322 /* Reset the chip */ 323 ether3_outw(CFG2_RESET, REG_CONFIG2); 324 udelay(4); 325 326 priv(dev)->regs.command = 0; 327 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); 328 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) 329 barrier(); 330 331 ether3_outw(priv(dev)->regs.config1 | CFG1_BUFSELSTAT0, REG_CONFIG1); 332 for (i = 0; i < 6; i++) 333 ether3_outb(dev->dev_addr[i], REG_BUFWIN); 334 335 priv(dev)->tx_head = 0; 336 priv(dev)->tx_tail = 0; 337 priv(dev)->regs.config2 |= CFG2_CTRLO; 338 priv(dev)->rx_head = RX_START; 339 340 ether3_outw(priv(dev)->regs.config1 | CFG1_TRANSEND, REG_CONFIG1); 341 ether3_outw((TX_END>>8) - 1, REG_BUFWIN); 342 ether3_outw(priv(dev)->rx_head, REG_RECVPTR); 343 ether3_outw(priv(dev)->rx_head >> 8, REG_RECVEND); 344 ether3_outw(0, REG_TRANSMITPTR); 345 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); 346 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 347 348 ether3_setbuffer(dev, buffer_write, 0); 349 ether3_writelong(dev, 0); 350 351 priv(dev)->regs.command = CMD_ENINTRX | CMD_ENINTTX; 352 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); 353 } 354 355 static inline int 356 ether3_probe_bus_8(struct net_device *dev, int val) 357 { 358 int write_low, write_high, read_low, read_high; 359 360 write_low = val & 255; 361 write_high = val >> 8; 362 363 printk(KERN_DEBUG "ether3_probe: write8 [%02X:%02X]", write_high, write_low); 364 365 ether3_outb(write_low, REG_RECVPTR); 366 ether3_outb(write_high, REG_RECVPTR + 4); 367 368 read_low = ether3_inb(REG_RECVPTR); 369 read_high = ether3_inb(REG_RECVPTR + 4); 370 371 printk(", read8 [%02X:%02X]\n", read_high, read_low); 372 373 return read_low == write_low && read_high == write_high; 374 } 375 376 static inline int 377 ether3_probe_bus_16(struct net_device *dev, int val) 378 { 379 int read_val; 380 381 ether3_outw(val, REG_RECVPTR); 382 read_val = ether3_inw(REG_RECVPTR); 383 384 printk(KERN_DEBUG "ether3_probe: write16 [%04X], read16 [%04X]\n", val, read_val); 385 386 return read_val == val; 387 } 388 389 /* 390 * Open/initialize the board. This is called (in the current kernel) 391 * sometime after booting when the 'ifconfig' program is run. 392 * 393 * This routine should set everything up anew at each open, even 394 * registers that "should" only need to be set once at boot, so that 395 * there is non-reboot way to recover if something goes wrong. 396 */ 397 static int 398 ether3_open(struct net_device *dev) 399 { 400 if (request_irq(dev->irq, ether3_interrupt, 0, "ether3", dev)) 401 return -EAGAIN; 402 403 ether3_init_for_open(dev); 404 405 netif_start_queue(dev); 406 407 return 0; 408 } 409 410 /* 411 * The inverse routine to ether3_open(). 412 */ 413 static int 414 ether3_close(struct net_device *dev) 415 { 416 netif_stop_queue(dev); 417 418 disable_irq(dev->irq); 419 420 ether3_outw(CMD_RXOFF|CMD_TXOFF, REG_COMMAND); 421 priv(dev)->regs.command = 0; 422 while (ether3_inw(REG_STATUS) & (STAT_RXON|STAT_TXON)) 423 barrier(); 424 ether3_outb(0x80, REG_CONFIG2 + 4); 425 ether3_outw(0, REG_COMMAND); 426 427 free_irq(dev->irq, dev); 428 429 return 0; 430 } 431 432 /* 433 * Set or clear promiscuous/multicast mode filter for this adaptor. 434 * 435 * We don't attempt any packet filtering. The card may have a SEEQ 8004 436 * in which does not have the other ethernet address registers present... 437 */ 438 static void ether3_setmulticastlist(struct net_device *dev) 439 { 440 priv(dev)->regs.config1 &= ~CFG1_RECVPROMISC; 441 442 if (dev->flags & IFF_PROMISC) { 443 /* promiscuous mode */ 444 priv(dev)->regs.config1 |= CFG1_RECVPROMISC; 445 } else if (dev->flags & IFF_ALLMULTI || !netdev_mc_empty(dev)) { 446 priv(dev)->regs.config1 |= CFG1_RECVSPECBRMULTI; 447 } else 448 priv(dev)->regs.config1 |= CFG1_RECVSPECBROAD; 449 450 ether3_outw(priv(dev)->regs.config1 | CFG1_LOCBUFMEM, REG_CONFIG1); 451 } 452 453 static void ether3_timeout(struct net_device *dev) 454 { 455 unsigned long flags; 456 457 del_timer(&priv(dev)->timer); 458 459 local_irq_save(flags); 460 printk(KERN_ERR "%s: transmit timed out, network cable problem?\n", dev->name); 461 printk(KERN_ERR "%s: state: { status=%04X cfg1=%04X cfg2=%04X }\n", dev->name, 462 ether3_inw(REG_STATUS), ether3_inw(REG_CONFIG1), ether3_inw(REG_CONFIG2)); 463 printk(KERN_ERR "%s: { rpr=%04X rea=%04X tpr=%04X }\n", dev->name, 464 ether3_inw(REG_RECVPTR), ether3_inw(REG_RECVEND), ether3_inw(REG_TRANSMITPTR)); 465 printk(KERN_ERR "%s: tx head=%X tx tail=%X\n", dev->name, 466 priv(dev)->tx_head, priv(dev)->tx_tail); 467 ether3_setbuffer(dev, buffer_read, priv(dev)->tx_tail); 468 printk(KERN_ERR "%s: packet status = %08X\n", dev->name, ether3_readlong(dev)); 469 local_irq_restore(flags); 470 471 priv(dev)->regs.config2 |= CFG2_CTRLO; 472 dev->stats.tx_errors += 1; 473 ether3_outw(priv(dev)->regs.config2, REG_CONFIG2); 474 priv(dev)->tx_head = priv(dev)->tx_tail = 0; 475 476 netif_wake_queue(dev); 477 } 478 479 /* 480 * Transmit a packet 481 */ 482 static netdev_tx_t 483 ether3_sendpacket(struct sk_buff *skb, struct net_device *dev) 484 { 485 unsigned long flags; 486 unsigned int length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; 487 unsigned int ptr, next_ptr; 488 489 if (priv(dev)->broken) { 490 dev_kfree_skb(skb); 491 dev->stats.tx_dropped++; 492 netif_start_queue(dev); 493 return NETDEV_TX_OK; 494 } 495 496 length = (length + 1) & ~1; 497 if (length != skb->len) { 498 if (skb_padto(skb, length)) 499 goto out; 500 } 501 502 next_ptr = (priv(dev)->tx_head + 1) & 15; 503 504 local_irq_save(flags); 505 506 if (priv(dev)->tx_tail == next_ptr) { 507 local_irq_restore(flags); 508 return NETDEV_TX_BUSY; /* unable to queue */ 509 } 510 511 ptr = 0x600 * priv(dev)->tx_head; 512 priv(dev)->tx_head = next_ptr; 513 next_ptr *= 0x600; 514 515 #define TXHDR_FLAGS (TXHDR_TRANSMIT|TXHDR_CHAINCONTINUE|TXHDR_DATAFOLLOWS|TXHDR_ENSUCCESS) 516 517 ether3_setbuffer(dev, buffer_write, next_ptr); 518 ether3_writelong(dev, 0); 519 ether3_setbuffer(dev, buffer_write, ptr); 520 ether3_writelong(dev, 0); 521 ether3_writebuffer(dev, skb->data, length); 522 ether3_writeword(dev, htons(next_ptr)); 523 ether3_writeword(dev, TXHDR_CHAINCONTINUE >> 16); 524 ether3_setbuffer(dev, buffer_write, ptr); 525 ether3_writeword(dev, htons((ptr + length + 4))); 526 ether3_writeword(dev, TXHDR_FLAGS >> 16); 527 ether3_ledon(dev); 528 529 if (!(ether3_inw(REG_STATUS) & STAT_TXON)) { 530 ether3_outw(ptr, REG_TRANSMITPTR); 531 ether3_outw(priv(dev)->regs.command | CMD_TXON, REG_COMMAND); 532 } 533 534 next_ptr = (priv(dev)->tx_head + 1) & 15; 535 local_irq_restore(flags); 536 537 dev_kfree_skb(skb); 538 539 if (priv(dev)->tx_tail == next_ptr) 540 netif_stop_queue(dev); 541 542 out: 543 return NETDEV_TX_OK; 544 } 545 546 static irqreturn_t 547 ether3_interrupt(int irq, void *dev_id) 548 { 549 struct net_device *dev = (struct net_device *)dev_id; 550 unsigned int status, handled = IRQ_NONE; 551 552 #if NET_DEBUG > 1 553 if(net_debug & DEBUG_INT) 554 printk("eth3irq: %d ", irq); 555 #endif 556 557 status = ether3_inw(REG_STATUS); 558 559 if (status & STAT_INTRX) { 560 ether3_outw(CMD_ACKINTRX | priv(dev)->regs.command, REG_COMMAND); 561 ether3_rx(dev, 12); 562 handled = IRQ_HANDLED; 563 } 564 565 if (status & STAT_INTTX) { 566 ether3_outw(CMD_ACKINTTX | priv(dev)->regs.command, REG_COMMAND); 567 ether3_tx(dev); 568 handled = IRQ_HANDLED; 569 } 570 571 #if NET_DEBUG > 1 572 if(net_debug & DEBUG_INT) 573 printk("done\n"); 574 #endif 575 return handled; 576 } 577 578 /* 579 * If we have a good packet(s), get it/them out of the buffers. 580 */ 581 static int ether3_rx(struct net_device *dev, unsigned int maxcnt) 582 { 583 unsigned int next_ptr = priv(dev)->rx_head, received = 0; 584 585 ether3_ledon(dev); 586 587 do { 588 unsigned int this_ptr, status; 589 unsigned char addrs[16]; 590 591 /* 592 * read the first 16 bytes from the buffer. 593 * This contains the status bytes etc and ethernet addresses, 594 * and we also check the source ethernet address to see if 595 * it originated from us. 596 */ 597 { 598 unsigned int temp_ptr; 599 ether3_setbuffer(dev, buffer_read, next_ptr); 600 temp_ptr = ether3_readword(dev); 601 status = ether3_readword(dev); 602 if ((status & (RXSTAT_DONE | RXHDR_CHAINCONTINUE | RXHDR_RECEIVE)) != 603 (RXSTAT_DONE | RXHDR_CHAINCONTINUE) || !temp_ptr) 604 break; 605 606 this_ptr = next_ptr + 4; 607 next_ptr = ntohs(temp_ptr); 608 } 609 ether3_setbuffer(dev, buffer_read, this_ptr); 610 ether3_readbuffer(dev, addrs+2, 12); 611 612 if (next_ptr < RX_START || next_ptr >= RX_END) { 613 int i; 614 printk("%s: bad next pointer @%04X: ", dev->name, priv(dev)->rx_head); 615 printk("%02X %02X %02X %02X ", next_ptr >> 8, next_ptr & 255, status & 255, status >> 8); 616 for (i = 2; i < 14; i++) 617 printk("%02X ", addrs[i]); 618 printk("\n"); 619 next_ptr = priv(dev)->rx_head; 620 break; 621 } 622 /* 623 * ignore our own packets... 624 */ 625 if (!(*(unsigned long *)&dev->dev_addr[0] ^ *(unsigned long *)&addrs[2+6]) && 626 !(*(unsigned short *)&dev->dev_addr[4] ^ *(unsigned short *)&addrs[2+10])) { 627 maxcnt ++; /* compensate for loopedback packet */ 628 ether3_outw(next_ptr >> 8, REG_RECVEND); 629 } else 630 if (!(status & (RXSTAT_OVERSIZE|RXSTAT_CRCERROR|RXSTAT_DRIBBLEERROR|RXSTAT_SHORTPACKET))) { 631 unsigned int length = next_ptr - this_ptr; 632 struct sk_buff *skb; 633 634 if (next_ptr <= this_ptr) 635 length += RX_END - RX_START; 636 637 skb = netdev_alloc_skb(dev, length + 2); 638 if (skb) { 639 unsigned char *buf; 640 641 skb_reserve(skb, 2); 642 buf = skb_put(skb, length); 643 ether3_readbuffer(dev, buf + 12, length - 12); 644 ether3_outw(next_ptr >> 8, REG_RECVEND); 645 *(unsigned short *)(buf + 0) = *(unsigned short *)(addrs + 2); 646 *(unsigned long *)(buf + 2) = *(unsigned long *)(addrs + 4); 647 *(unsigned long *)(buf + 6) = *(unsigned long *)(addrs + 8); 648 *(unsigned short *)(buf + 10) = *(unsigned short *)(addrs + 12); 649 skb->protocol = eth_type_trans(skb, dev); 650 netif_rx(skb); 651 received ++; 652 } else { 653 ether3_outw(next_ptr >> 8, REG_RECVEND); 654 dev->stats.rx_dropped++; 655 goto done; 656 } 657 } else { 658 struct net_device_stats *stats = &dev->stats; 659 ether3_outw(next_ptr >> 8, REG_RECVEND); 660 if (status & RXSTAT_OVERSIZE) stats->rx_over_errors ++; 661 if (status & RXSTAT_CRCERROR) stats->rx_crc_errors ++; 662 if (status & RXSTAT_DRIBBLEERROR) stats->rx_fifo_errors ++; 663 if (status & RXSTAT_SHORTPACKET) stats->rx_length_errors ++; 664 stats->rx_errors++; 665 } 666 } 667 while (-- maxcnt); 668 669 done: 670 dev->stats.rx_packets += received; 671 priv(dev)->rx_head = next_ptr; 672 /* 673 * If rx went off line, then that means that the buffer may be full. We 674 * have dropped at least one packet. 675 */ 676 if (!(ether3_inw(REG_STATUS) & STAT_RXON)) { 677 dev->stats.rx_dropped++; 678 ether3_outw(next_ptr, REG_RECVPTR); 679 ether3_outw(priv(dev)->regs.command | CMD_RXON, REG_COMMAND); 680 } 681 682 return maxcnt; 683 } 684 685 /* 686 * Update stats for the transmitted packet(s) 687 */ 688 static void ether3_tx(struct net_device *dev) 689 { 690 unsigned int tx_tail = priv(dev)->tx_tail; 691 int max_work = 14; 692 693 do { 694 unsigned long status; 695 696 /* 697 * Read the packet header 698 */ 699 ether3_setbuffer(dev, buffer_read, tx_tail * 0x600); 700 status = ether3_readlong(dev); 701 702 /* 703 * Check to see if this packet has been transmitted 704 */ 705 if ((status & (TXSTAT_DONE | TXHDR_TRANSMIT)) != 706 (TXSTAT_DONE | TXHDR_TRANSMIT)) 707 break; 708 709 /* 710 * Update errors 711 */ 712 if (!(status & (TXSTAT_BABBLED | TXSTAT_16COLLISIONS))) 713 dev->stats.tx_packets++; 714 else { 715 dev->stats.tx_errors++; 716 if (status & TXSTAT_16COLLISIONS) 717 dev->stats.collisions += 16; 718 if (status & TXSTAT_BABBLED) 719 dev->stats.tx_fifo_errors++; 720 } 721 722 tx_tail = (tx_tail + 1) & 15; 723 } while (--max_work); 724 725 if (priv(dev)->tx_tail != tx_tail) { 726 priv(dev)->tx_tail = tx_tail; 727 netif_wake_queue(dev); 728 } 729 } 730 731 static void ether3_banner(void) 732 { 733 static unsigned version_printed = 0; 734 735 if (net_debug && version_printed++ == 0) 736 printk(KERN_INFO "%s", version); 737 } 738 739 static const struct net_device_ops ether3_netdev_ops = { 740 .ndo_open = ether3_open, 741 .ndo_stop = ether3_close, 742 .ndo_start_xmit = ether3_sendpacket, 743 .ndo_set_rx_mode = ether3_setmulticastlist, 744 .ndo_tx_timeout = ether3_timeout, 745 .ndo_validate_addr = eth_validate_addr, 746 .ndo_set_mac_address = eth_mac_addr, 747 }; 748 749 static int 750 ether3_probe(struct expansion_card *ec, const struct ecard_id *id) 751 { 752 const struct ether3_data *data = id->data; 753 struct net_device *dev; 754 int bus_type, ret; 755 756 ether3_banner(); 757 758 ret = ecard_request_resources(ec); 759 if (ret) 760 goto out; 761 762 dev = alloc_etherdev(sizeof(struct dev_priv)); 763 if (!dev) { 764 ret = -ENOMEM; 765 goto release; 766 } 767 768 SET_NETDEV_DEV(dev, &ec->dev); 769 770 priv(dev)->base = ecardm_iomap(ec, ECARD_RES_MEMC, 0, 0); 771 if (!priv(dev)->base) { 772 ret = -ENOMEM; 773 goto free; 774 } 775 776 ec->irqaddr = priv(dev)->base + data->base_offset; 777 ec->irqmask = 0xf0; 778 779 priv(dev)->seeq = priv(dev)->base + data->base_offset; 780 dev->irq = ec->irq; 781 782 ether3_addr(dev->dev_addr, ec); 783 784 priv(dev)->dev = dev; 785 timer_setup(&priv(dev)->timer, ether3_ledoff, 0); 786 787 /* Reset card... 788 */ 789 ether3_outb(0x80, REG_CONFIG2 + 4); 790 bus_type = BUS_UNKNOWN; 791 udelay(4); 792 793 /* Test using Receive Pointer (16-bit register) to find out 794 * how the ether3 is connected to the bus... 795 */ 796 if (ether3_probe_bus_8(dev, 0x100) && 797 ether3_probe_bus_8(dev, 0x201)) 798 bus_type = BUS_8; 799 800 if (bus_type == BUS_UNKNOWN && 801 ether3_probe_bus_16(dev, 0x101) && 802 ether3_probe_bus_16(dev, 0x201)) 803 bus_type = BUS_16; 804 805 switch (bus_type) { 806 case BUS_UNKNOWN: 807 printk(KERN_ERR "%s: unable to identify bus width\n", dev->name); 808 ret = -ENODEV; 809 goto free; 810 811 case BUS_8: 812 printk(KERN_ERR "%s: %s found, but is an unsupported " 813 "8-bit card\n", dev->name, data->name); 814 ret = -ENODEV; 815 goto free; 816 817 default: 818 break; 819 } 820 821 if (ether3_init_2(dev)) { 822 ret = -ENODEV; 823 goto free; 824 } 825 826 dev->netdev_ops = ðer3_netdev_ops; 827 dev->watchdog_timeo = 5 * HZ / 100; 828 829 ret = register_netdev(dev); 830 if (ret) 831 goto free; 832 833 printk("%s: %s in slot %d, %pM\n", 834 dev->name, data->name, ec->slot_no, dev->dev_addr); 835 836 ecard_set_drvdata(ec, dev); 837 return 0; 838 839 free: 840 free_netdev(dev); 841 release: 842 ecard_release_resources(ec); 843 out: 844 return ret; 845 } 846 847 static void ether3_remove(struct expansion_card *ec) 848 { 849 struct net_device *dev = ecard_get_drvdata(ec); 850 851 ecard_set_drvdata(ec, NULL); 852 853 unregister_netdev(dev); 854 free_netdev(dev); 855 ecard_release_resources(ec); 856 } 857 858 static struct ether3_data ether3 = { 859 .name = "ether3", 860 .base_offset = 0, 861 }; 862 863 static struct ether3_data etherb = { 864 .name = "etherb", 865 .base_offset = 0x800, 866 }; 867 868 static const struct ecard_id ether3_ids[] = { 869 { MANU_ANT2, PROD_ANT_ETHER3, ðer3 }, 870 { MANU_ANT, PROD_ANT_ETHER3, ðer3 }, 871 { MANU_ANT, PROD_ANT_ETHERB, ðerb }, 872 { 0xffff, 0xffff } 873 }; 874 875 static struct ecard_driver ether3_driver = { 876 .probe = ether3_probe, 877 .remove = ether3_remove, 878 .id_table = ether3_ids, 879 .drv = { 880 .name = "ether3", 881 }, 882 }; 883 884 static int __init ether3_init(void) 885 { 886 return ecard_register_driver(ðer3_driver); 887 } 888 889 static void __exit ether3_exit(void) 890 { 891 ecard_remove_driver(ðer3_driver); 892 } 893 894 module_init(ether3_init); 895 module_exit(ether3_exit); 896 897 MODULE_LICENSE("GPL"); 898