1/* 2 * Linux Ethernet device driver for the 3Com Etherlink Plus (3C505) 3 * By Craig Southeren, Juha Laiho and Philip Blundell 4 * 5 * 3c505.c This module implements an interface to the 3Com 6 * Etherlink Plus (3c505) Ethernet card. Linux device 7 * driver interface reverse engineered from the Linux 3C509 8 * device drivers. Some 3C505 information gleaned from 9 * the Crynwr packet driver. Still this driver would not 10 * be here without 3C505 technical reference provided by 11 * 3Com. 12 * 13 * $Id: 3c505.c,v 1.1.1.1 2008/10/15 03:26:35 james26_jang Exp $ 14 * 15 * Authors: Linux 3c505 device driver by 16 * Craig Southeren, <craigs@ineluki.apana.org.au> 17 * Final debugging by 18 * Andrew Tridgell, <tridge@nimbus.anu.edu.au> 19 * Auto irq/address, tuning, cleanup and v1.1.4+ kernel mods by 20 * Juha Laiho, <jlaiho@ichaos.nullnet.fi> 21 * Linux 3C509 driver by 22 * Donald Becker, <becker@super.org> 23 * (Now at <becker@scyld.com>) 24 * Crynwr packet driver by 25 * Krishnan Gopalan and Gregg Stefancik, 26 * Clemson University Engineering Computer Operations. 27 * Portions of the code have been adapted from the 3c505 28 * driver for NCSA Telnet by Bruce Orchard and later 29 * modified by Warren Van Houten and krus@diku.dk. 30 * 3C505 technical information provided by 31 * Terry Murphy, of 3Com Network Adapter Division 32 * Linux 1.3.0 changes by 33 * Alan Cox <Alan.Cox@linux.org> 34 * More debugging, DMA support, currently maintained by 35 * Philip Blundell <Philip.Blundell@pobox.com> 36 * Multicard/soft configurable dma channel/rev 2 hardware support 37 * by Christopher Collins <ccollins@pcug.org.au> 38 * Ethtool support (jgarzik), 11/17/2001 39 */ 40 41#define DRV_NAME "3c505" 42#define DRV_VERSION "1.10a" 43 44 45/* Theory of operation: 46 * 47 * The 3c505 is quite an intelligent board. All communication with it is done 48 * by means of Primary Command Blocks (PCBs); these are transferred using PIO 49 * through the command register. The card has 256k of on-board RAM, which is 50 * used to buffer received packets. It might seem at first that more buffers 51 * are better, but in fact this isn't true. From my tests, it seems that 52 * more than about 10 buffers are unnecessary, and there is a noticeable 53 * performance hit in having more active on the card. So the majority of the 54 * card's memory isn't, in fact, used. Sadly, the card only has one transmit 55 * buffer and, short of loading our own firmware into it (which is what some 56 * drivers resort to) there's nothing we can do about this. 57 * 58 * We keep up to 4 "receive packet" commands active on the board at a time. 59 * When a packet comes in, so long as there is a receive command active, the 60 * board will send us a "packet received" PCB and then add the data for that 61 * packet to the DMA queue. If a DMA transfer is not already in progress, we 62 * set one up to start uploading the data. We have to maintain a list of 63 * backlogged receive packets, because the card may decide to tell us about 64 * a newly-arrived packet at any time, and we may not be able to start a DMA 65 * transfer immediately (ie one may already be going on). We can't NAK the 66 * PCB, because then it would throw the packet away. 67 * 68 * Trying to send a PCB to the card at the wrong moment seems to have bad 69 * effects. If we send it a transmit PCB while a receive DMA is happening, 70 * it will just NAK the PCB and so we will have wasted our time. Worse, it 71 * sometimes seems to interrupt the transfer. The majority of the low-level 72 * code is protected by one huge semaphore -- "busy" -- which is set whenever 73 * it probably isn't safe to do anything to the card. The receive routine 74 * must gain a lock on "busy" before it can start a DMA transfer, and the 75 * transmit routine must gain a lock before it sends the first PCB to the card. 76 * The send_pcb() routine also has an internal semaphore to protect it against 77 * being re-entered (which would be disastrous) -- this is needed because 78 * several things can happen asynchronously (re-priming the receiver and 79 * asking the card for statistics, for example). send_pcb() will also refuse 80 * to talk to the card at all if a DMA upload is happening. The higher-level 81 * networking code will reschedule a later retry if some part of the driver 82 * is blocked. In practice, this doesn't seem to happen very often. 83 */ 84 85/* This driver may now work with revision 2.x hardware, since all the read 86 * operations on the HCR have been removed (we now keep our own softcopy). 87 * But I don't have an old card to test it on. 88 * 89 * This has had the bad effect that the autoprobe routine is now a bit 90 * less friendly to other devices. However, it was never very good. 91 * before, so I doubt it will hurt anybody. 92 */ 93 94/* The driver is a mess. I took Craig's and Juha's code, and hacked it firstly 95 * to make it more reliable, and secondly to add DMA mode. Many things could 96 * probably be done better; the concurrency protection is particularly awful. 97 */ 98 99#include <linux/module.h> 100 101#include <linux/kernel.h> 102#include <linux/sched.h> 103#include <linux/string.h> 104#include <linux/interrupt.h> 105#include <linux/ptrace.h> 106#include <linux/errno.h> 107#include <linux/in.h> 108#include <linux/slab.h> 109#include <linux/ioport.h> 110#include <linux/spinlock.h> 111#include <linux/ethtool.h> 112 113#include <asm/uaccess.h> 114#include <asm/bitops.h> 115#include <asm/io.h> 116#include <asm/dma.h> 117 118#include <linux/netdevice.h> 119#include <linux/etherdevice.h> 120#include <linux/skbuff.h> 121#include <linux/init.h> 122 123#include "3c505.h" 124 125/********************************************************* 126 * 127 * define debug messages here as common strings to reduce space 128 * 129 *********************************************************/ 130 131static const char filename[] = __FILE__; 132 133static const char timeout_msg[] = "*** timeout at %s:%s (line %d) ***\n"; 134#define TIMEOUT_MSG(lineno) \ 135 printk(timeout_msg, filename,__FUNCTION__,(lineno)) 136 137static const char invalid_pcb_msg[] = 138"*** invalid pcb length %d at %s:%s (line %d) ***\n"; 139#define INVALID_PCB_MSG(len) \ 140 printk(invalid_pcb_msg, (len),filename,__FUNCTION__,__LINE__) 141 142static char search_msg[] __initdata = "%s: Looking for 3c505 adapter at address %#x..."; 143 144static char stilllooking_msg[] __initdata = "still looking..."; 145 146static char found_msg[] __initdata = "found.\n"; 147 148static char notfound_msg[] __initdata = "not found (reason = %d)\n"; 149 150static char couldnot_msg[] __initdata = "%s: 3c505 not found\n"; 151 152/********************************************************* 153 * 154 * various other debug stuff 155 * 156 *********************************************************/ 157 158#ifdef ELP_DEBUG 159static int elp_debug = ELP_DEBUG; 160#else 161static int elp_debug; 162#endif 163#define debug elp_debug 164 165/* 166 * 0 = no messages (well, some) 167 * 1 = messages when high level commands performed 168 * 2 = messages when low level commands performed 169 * 3 = messages when interrupts received 170 */ 171 172/***************************************************************** 173 * 174 * useful macros 175 * 176 *****************************************************************/ 177 178#ifndef TRUE 179#define TRUE 1 180#endif 181 182#ifndef FALSE 183#define FALSE 0 184#endif 185 186 187/***************************************************************** 188 * 189 * List of I/O-addresses we try to auto-sense 190 * Last element MUST BE 0! 191 *****************************************************************/ 192 193static int addr_list[] __initdata = {0x300, 0x280, 0x310, 0}; 194 195/* Dma Memory related stuff */ 196 197static unsigned long dma_mem_alloc(int size) 198{ 199 int order = get_order(size); 200 201 return __get_dma_pages(GFP_KERNEL, order); 202} 203 204 205/***************************************************************** 206 * 207 * Functions for I/O (note the inline !) 208 * 209 *****************************************************************/ 210 211static inline unsigned char inb_status(unsigned int base_addr) 212{ 213 return inb(base_addr + PORT_STATUS); 214} 215 216static inline int inb_command(unsigned int base_addr) 217{ 218 return inb(base_addr + PORT_COMMAND); 219} 220 221static inline void outb_control(unsigned char val, struct net_device *dev) 222{ 223 outb(val, dev->base_addr + PORT_CONTROL); 224 ((elp_device *)(dev->priv))->hcr_val = val; 225} 226 227#define HCR_VAL(x) (((elp_device *)((x)->priv))->hcr_val) 228 229static inline void outb_command(unsigned char val, unsigned int base_addr) 230{ 231 outb(val, base_addr + PORT_COMMAND); 232} 233 234static inline unsigned int inw_data(unsigned int base_addr) 235{ 236 return inw(base_addr + PORT_DATA); 237} 238 239static inline void outw_data(unsigned int val, unsigned int base_addr) 240{ 241 outw(val, base_addr + PORT_DATA); 242} 243 244static inline unsigned int backlog_next(unsigned int n) 245{ 246 return (n + 1) % BACKLOG_SIZE; 247} 248 249/***************************************************************** 250 * 251 * useful functions for accessing the adapter 252 * 253 *****************************************************************/ 254 255/* 256 * use this routine when accessing the ASF bits as they are 257 * changed asynchronously by the adapter 258 */ 259 260/* get adapter PCB status */ 261#define GET_ASF(addr) \ 262 (get_status(addr)&ASF_PCB_MASK) 263 264static inline int get_status(unsigned int base_addr) 265{ 266 int timeout = jiffies + 10*HZ/100; 267 register int stat1; 268 do { 269 stat1 = inb_status(base_addr); 270 } while (stat1 != inb_status(base_addr) && time_before(jiffies, timeout)); 271 if (time_after_eq(jiffies, timeout)) 272 TIMEOUT_MSG(__LINE__); 273 return stat1; 274} 275 276static inline void set_hsf(struct net_device *dev, int hsf) 277{ 278 cli(); 279 outb_control((HCR_VAL(dev) & ~HSF_PCB_MASK) | hsf, dev); 280 sti(); 281} 282 283static int start_receive(struct net_device *, pcb_struct *); 284 285inline static void adapter_reset(struct net_device *dev) 286{ 287 int timeout; 288 elp_device *adapter = dev->priv; 289 unsigned char orig_hcr = adapter->hcr_val; 290 291 outb_control(0, dev); 292 293 if (inb_status(dev->base_addr) & ACRF) { 294 do { 295 inb_command(dev->base_addr); 296 timeout = jiffies + 2*HZ/100; 297 while (time_before_eq(jiffies, timeout) && !(inb_status(dev->base_addr) & ACRF)); 298 } while (inb_status(dev->base_addr) & ACRF); 299 set_hsf(dev, HSF_PCB_NAK); 300 } 301 outb_control(adapter->hcr_val | ATTN | DIR, dev); 302 timeout = jiffies + 1*HZ/100; 303 while (time_before_eq(jiffies, timeout)); 304 outb_control(adapter->hcr_val & ~ATTN, dev); 305 timeout = jiffies + 1*HZ/100; 306 while (time_before_eq(jiffies, timeout)); 307 outb_control(adapter->hcr_val | FLSH, dev); 308 timeout = jiffies + 1*HZ/100; 309 while (time_before_eq(jiffies, timeout)); 310 outb_control(adapter->hcr_val & ~FLSH, dev); 311 timeout = jiffies + 1*HZ/100; 312 while (time_before_eq(jiffies, timeout)); 313 314 outb_control(orig_hcr, dev); 315 if (!start_receive(dev, &adapter->tx_pcb)) 316 printk("%s: start receive command failed \n", dev->name); 317} 318 319/* Check to make sure that a DMA transfer hasn't timed out. This should 320 * never happen in theory, but seems to occur occasionally if the card gets 321 * prodded at the wrong time. 322 */ 323static inline void check_3c505_dma(struct net_device *dev) 324{ 325 elp_device *adapter = dev->priv; 326 if (adapter->dmaing && time_after(jiffies, adapter->current_dma.start_time + 10)) { 327 unsigned long flags, f; 328 printk("%s: DMA %s timed out, %d bytes left\n", dev->name, adapter->current_dma.direction ? "download" : "upload", get_dma_residue(dev->dma)); 329 save_flags(flags); 330 cli(); 331 adapter->dmaing = 0; 332 adapter->busy = 0; 333 334 f=claim_dma_lock(); 335 disable_dma(dev->dma); 336 release_dma_lock(f); 337 338 if (adapter->rx_active) 339 adapter->rx_active--; 340 outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev); 341 restore_flags(flags); 342 } 343} 344 345/* Primitive functions used by send_pcb() */ 346static inline unsigned int send_pcb_slow(unsigned int base_addr, unsigned char byte) 347{ 348 unsigned int timeout; 349 outb_command(byte, base_addr); 350 for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) { 351 if (inb_status(base_addr) & HCRE) 352 return FALSE; 353 } 354 printk("3c505: send_pcb_slow timed out\n"); 355 return TRUE; 356} 357 358static inline unsigned int send_pcb_fast(unsigned int base_addr, unsigned char byte) 359{ 360 unsigned int timeout; 361 outb_command(byte, base_addr); 362 for (timeout = 0; timeout < 40000; timeout++) { 363 if (inb_status(base_addr) & HCRE) 364 return FALSE; 365 } 366 printk("3c505: send_pcb_fast timed out\n"); 367 return TRUE; 368} 369 370/* Check to see if the receiver needs restarting, and kick it if so */ 371static inline void prime_rx(struct net_device *dev) 372{ 373 elp_device *adapter = dev->priv; 374 while (adapter->rx_active < ELP_RX_PCBS && netif_running(dev)) { 375 if (!start_receive(dev, &adapter->itx_pcb)) 376 break; 377 } 378} 379 380/***************************************************************** 381 * 382 * send_pcb 383 * Send a PCB to the adapter. 384 * 385 * output byte to command reg --<--+ 386 * wait until HCRE is non zero | 387 * loop until all bytes sent -->--+ 388 * set HSF1 and HSF2 to 1 389 * output pcb length 390 * wait until ASF give ACK or NAK 391 * set HSF1 and HSF2 to 0 392 * 393 *****************************************************************/ 394 395/* This can be quite slow -- the adapter is allowed to take up to 40ms 396 * to respond to the initial interrupt. 397 * 398 * We run initially with interrupts turned on, but with a semaphore set 399 * so that nobody tries to re-enter this code. Once the first byte has 400 * gone through, we turn interrupts off and then send the others (the 401 * timeout is reduced to 500us). 402 */ 403 404static int send_pcb(struct net_device *dev, pcb_struct * pcb) 405{ 406 int i; 407 int timeout; 408 elp_device *adapter = dev->priv; 409 410 check_3c505_dma(dev); 411 412 if (adapter->dmaing && adapter->current_dma.direction == 0) 413 return FALSE; 414 415 /* Avoid contention */ 416 if (test_and_set_bit(1, &adapter->send_pcb_semaphore)) { 417 if (elp_debug >= 3) { 418 printk("%s: send_pcb entered while threaded\n", dev->name); 419 } 420 return FALSE; 421 } 422 /* 423 * load each byte into the command register and 424 * wait for the HCRE bit to indicate the adapter 425 * had read the byte 426 */ 427 set_hsf(dev, 0); 428 429 if (send_pcb_slow(dev->base_addr, pcb->command)) 430 goto abort; 431 432 cli(); 433 434 if (send_pcb_fast(dev->base_addr, pcb->length)) 435 goto sti_abort; 436 437 for (i = 0; i < pcb->length; i++) { 438 if (send_pcb_fast(dev->base_addr, pcb->data.raw[i])) 439 goto sti_abort; 440 } 441 442 outb_control(adapter->hcr_val | 3, dev); /* signal end of PCB */ 443 outb_command(2 + pcb->length, dev->base_addr); 444 445 /* now wait for the acknowledgement */ 446 sti(); 447 448 for (timeout = jiffies + 5*HZ/100; time_before(jiffies, timeout);) { 449 switch (GET_ASF(dev->base_addr)) { 450 case ASF_PCB_ACK: 451 adapter->send_pcb_semaphore = 0; 452 return TRUE; 453 break; 454 case ASF_PCB_NAK: 455#ifdef ELP_DEBUG 456 printk(KERN_DEBUG "%s: send_pcb got NAK\n", dev->name); 457#endif 458 goto abort; 459 break; 460 } 461 } 462 463 if (elp_debug >= 1) 464 printk("%s: timeout waiting for PCB acknowledge (status %02x)\n", dev->name, inb_status(dev->base_addr)); 465 466 sti_abort: 467 sti(); 468 abort: 469 adapter->send_pcb_semaphore = 0; 470 return FALSE; 471} 472 473 474/***************************************************************** 475 * 476 * receive_pcb 477 * Read a PCB from the adapter 478 * 479 * wait for ACRF to be non-zero ---<---+ 480 * input a byte | 481 * if ASF1 and ASF2 were not both one | 482 * before byte was read, loop --->---+ 483 * set HSF1 and HSF2 for ack 484 * 485 *****************************************************************/ 486 487static int receive_pcb(struct net_device *dev, pcb_struct * pcb) 488{ 489 int i, j; 490 int total_length; 491 int stat; 492 int timeout; 493 494 elp_device *adapter = dev->priv; 495 496 set_hsf(dev, 0); 497 498 /* get the command code */ 499 timeout = jiffies + 2*HZ/100; 500 while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout)); 501 if (time_after_eq(jiffies, timeout)) { 502 TIMEOUT_MSG(__LINE__); 503 return FALSE; 504 } 505 pcb->command = inb_command(dev->base_addr); 506 507 /* read the data length */ 508 timeout = jiffies + 3*HZ/100; 509 while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && time_before(jiffies, timeout)); 510 if (time_after_eq(jiffies, timeout)) { 511 TIMEOUT_MSG(__LINE__); 512 printk("%s: status %02x\n", dev->name, stat); 513 return FALSE; 514 } 515 pcb->length = inb_command(dev->base_addr); 516 517 if (pcb->length > MAX_PCB_DATA) { 518 INVALID_PCB_MSG(pcb->length); 519 adapter_reset(dev); 520 return FALSE; 521 } 522 /* read the data */ 523 cli(); 524 i = 0; 525 do { 526 j = 0; 527 while (((stat = get_status(dev->base_addr)) & ACRF) == 0 && j++ < 20000); 528 pcb->data.raw[i++] = inb_command(dev->base_addr); 529 if (i > MAX_PCB_DATA) 530 INVALID_PCB_MSG(i); 531 } while ((stat & ASF_PCB_MASK) != ASF_PCB_END && j < 20000); 532 sti(); 533 if (j >= 20000) { 534 TIMEOUT_MSG(__LINE__); 535 return FALSE; 536 } 537 /* woops, the last "data" byte was really the length! */ 538 total_length = pcb->data.raw[--i]; 539 540 /* safety check total length vs data length */ 541 if (total_length != (pcb->length + 2)) { 542 if (elp_debug >= 2) 543 printk("%s: mangled PCB received\n", dev->name); 544 set_hsf(dev, HSF_PCB_NAK); 545 return FALSE; 546 } 547 548 if (pcb->command == CMD_RECEIVE_PACKET_COMPLETE) { 549 if (test_and_set_bit(0, (void *) &adapter->busy)) { 550 if (backlog_next(adapter->rx_backlog.in) == adapter->rx_backlog.out) { 551 set_hsf(dev, HSF_PCB_NAK); 552 printk("%s: PCB rejected, transfer in progress and backlog full\n", dev->name); 553 pcb->command = 0; 554 return TRUE; 555 } else { 556 pcb->command = 0xff; 557 } 558 } 559 } 560 set_hsf(dev, HSF_PCB_ACK); 561 return TRUE; 562} 563 564/****************************************************** 565 * 566 * queue a receive command on the adapter so we will get an 567 * interrupt when a packet is received. 568 * 569 ******************************************************/ 570 571static int start_receive(struct net_device *dev, pcb_struct * tx_pcb) 572{ 573 int status; 574 elp_device *adapter = dev->priv; 575 576 if (elp_debug >= 3) 577 printk("%s: restarting receiver\n", dev->name); 578 tx_pcb->command = CMD_RECEIVE_PACKET; 579 tx_pcb->length = sizeof(struct Rcv_pkt); 580 tx_pcb->data.rcv_pkt.buf_seg 581 = tx_pcb->data.rcv_pkt.buf_ofs = 0; /* Unused */ 582 tx_pcb->data.rcv_pkt.buf_len = 1600; 583 tx_pcb->data.rcv_pkt.timeout = 0; /* set timeout to zero */ 584 status = send_pcb(dev, tx_pcb); 585 if (status) 586 adapter->rx_active++; 587 return status; 588} 589 590/****************************************************** 591 * 592 * extract a packet from the adapter 593 * this routine is only called from within the interrupt 594 * service routine, so no cli/sti calls are needed 595 * note that the length is always assumed to be even 596 * 597 ******************************************************/ 598 599static void receive_packet(struct net_device *dev, int len) 600{ 601 int rlen; 602 elp_device *adapter = dev->priv; 603 void *target; 604 struct sk_buff *skb; 605 unsigned long flags; 606 607 rlen = (len + 1) & ~1; 608 skb = dev_alloc_skb(rlen + 2); 609 610 if (!skb) { 611 printk("%s: memory squeeze, dropping packet\n", dev->name); 612 target = adapter->dma_buffer; 613 adapter->current_dma.target = NULL; 614 return; 615 } 616 617 skb_reserve(skb, 2); 618 target = skb_put(skb, rlen); 619 if ((unsigned long)(target + rlen) >= MAX_DMA_ADDRESS) { 620 adapter->current_dma.target = target; 621 target = adapter->dma_buffer; 622 } else { 623 adapter->current_dma.target = NULL; 624 } 625 626 /* if this happens, we die */ 627 if (test_and_set_bit(0, (void *) &adapter->dmaing)) 628 printk("%s: rx blocked, DMA in progress, dir %d\n", dev->name, adapter->current_dma.direction); 629 630 skb->dev = dev; 631 adapter->current_dma.direction = 0; 632 adapter->current_dma.length = rlen; 633 adapter->current_dma.skb = skb; 634 adapter->current_dma.start_time = jiffies; 635 636 outb_control(adapter->hcr_val | DIR | TCEN | DMAE, dev); 637 638 flags=claim_dma_lock(); 639 disable_dma(dev->dma); 640 clear_dma_ff(dev->dma); 641 set_dma_mode(dev->dma, 0x04); /* dma read */ 642 set_dma_addr(dev->dma, virt_to_bus(target)); 643 set_dma_count(dev->dma, rlen); 644 enable_dma(dev->dma); 645 release_dma_lock(flags); 646 647 if (elp_debug >= 3) { 648 printk("%s: rx DMA transfer started\n", dev->name); 649 } 650 651 if (adapter->rx_active) 652 adapter->rx_active--; 653 654 if (!adapter->busy) 655 printk("%s: receive_packet called, busy not set.\n", dev->name); 656} 657 658/****************************************************** 659 * 660 * interrupt handler 661 * 662 ******************************************************/ 663 664static void elp_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr) 665{ 666 int len; 667 int dlen; 668 int icount = 0; 669 struct net_device *dev; 670 elp_device *adapter; 671 int timeout; 672 673 dev = dev_id; 674 adapter = (elp_device *) dev->priv; 675 676 spin_lock(&adapter->lock); 677 678 do { 679 /* 680 * has a DMA transfer finished? 681 */ 682 if (inb_status(dev->base_addr) & DONE) { 683 if (!adapter->dmaing) { 684 printk("%s: phantom DMA completed\n", dev->name); 685 } 686 if (elp_debug >= 3) { 687 printk("%s: %s DMA complete, status %02x\n", dev->name, adapter->current_dma.direction ? "tx" : "rx", inb_status(dev->base_addr)); 688 } 689 690 outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev); 691 if (adapter->current_dma.direction) { 692 dev_kfree_skb_irq(adapter->current_dma.skb); 693 } else { 694 struct sk_buff *skb = adapter->current_dma.skb; 695 if (skb) { 696 if (adapter->current_dma.target) { 697 /* have already done the skb_put() */ 698 memcpy(adapter->current_dma.target, adapter->dma_buffer, adapter->current_dma.length); 699 } 700 skb->protocol = eth_type_trans(skb,dev); 701 adapter->stats.rx_bytes += skb->len; 702 netif_rx(skb); 703 dev->last_rx = jiffies; 704 } 705 } 706 adapter->dmaing = 0; 707 if (adapter->rx_backlog.in != adapter->rx_backlog.out) { 708 int t = adapter->rx_backlog.length[adapter->rx_backlog.out]; 709 adapter->rx_backlog.out = backlog_next(adapter->rx_backlog.out); 710 if (elp_debug >= 2) 711 printk("%s: receiving backlogged packet (%d)\n", dev->name, t); 712 receive_packet(dev, t); 713 } else { 714 adapter->busy = 0; 715 } 716 } else { 717 /* has one timed out? */ 718 check_3c505_dma(dev); 719 } 720 721 /* 722 * receive a PCB from the adapter 723 */ 724 timeout = jiffies + 3*HZ/100; 725 while ((inb_status(dev->base_addr) & ACRF) != 0 && time_before(jiffies, timeout)) { 726 if (receive_pcb(dev, &adapter->irx_pcb)) { 727 switch (adapter->irx_pcb.command) 728 { 729 case 0: 730 break; 731 /* 732 * received a packet - this must be handled fast 733 */ 734 case 0xff: 735 case CMD_RECEIVE_PACKET_COMPLETE: 736 /* if the device isn't open, don't pass packets up the stack */ 737 if (!netif_running(dev)) 738 break; 739 len = adapter->irx_pcb.data.rcv_resp.pkt_len; 740 dlen = adapter->irx_pcb.data.rcv_resp.buf_len; 741 if (adapter->irx_pcb.data.rcv_resp.timeout != 0) { 742 printk(KERN_ERR "%s: interrupt - packet not received correctly\n", dev->name); 743 } else { 744 if (elp_debug >= 3) { 745 printk("%s: interrupt - packet received of length %i (%i)\n", dev->name, len, dlen); 746 } 747 if (adapter->irx_pcb.command == 0xff) { 748 if (elp_debug >= 2) 749 printk("%s: adding packet to backlog (len = %d)\n", dev->name, dlen); 750 adapter->rx_backlog.length[adapter->rx_backlog.in] = dlen; 751 adapter->rx_backlog.in = backlog_next(adapter->rx_backlog.in); 752 } else { 753 receive_packet(dev, dlen); 754 } 755 if (elp_debug >= 3) 756 printk("%s: packet received\n", dev->name); 757 } 758 break; 759 760 /* 761 * 82586 configured correctly 762 */ 763 case CMD_CONFIGURE_82586_RESPONSE: 764 adapter->got[CMD_CONFIGURE_82586] = 1; 765 if (elp_debug >= 3) 766 printk("%s: interrupt - configure response received\n", dev->name); 767 break; 768 769 /* 770 * Adapter memory configuration 771 */ 772 case CMD_CONFIGURE_ADAPTER_RESPONSE: 773 adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 1; 774 if (elp_debug >= 3) 775 printk("%s: Adapter memory configuration %s.\n", dev->name, 776 adapter->irx_pcb.data.failed ? "failed" : "succeeded"); 777 break; 778 779 /* 780 * Multicast list loading 781 */ 782 case CMD_LOAD_MULTICAST_RESPONSE: 783 adapter->got[CMD_LOAD_MULTICAST_LIST] = 1; 784 if (elp_debug >= 3) 785 printk("%s: Multicast address list loading %s.\n", dev->name, 786 adapter->irx_pcb.data.failed ? "failed" : "succeeded"); 787 break; 788 789 /* 790 * Station address setting 791 */ 792 case CMD_SET_ADDRESS_RESPONSE: 793 adapter->got[CMD_SET_STATION_ADDRESS] = 1; 794 if (elp_debug >= 3) 795 printk("%s: Ethernet address setting %s.\n", dev->name, 796 adapter->irx_pcb.data.failed ? "failed" : "succeeded"); 797 break; 798 799 800 /* 801 * received board statistics 802 */ 803 case CMD_NETWORK_STATISTICS_RESPONSE: 804 adapter->stats.rx_packets += adapter->irx_pcb.data.netstat.tot_recv; 805 adapter->stats.tx_packets += adapter->irx_pcb.data.netstat.tot_xmit; 806 adapter->stats.rx_crc_errors += adapter->irx_pcb.data.netstat.err_CRC; 807 adapter->stats.rx_frame_errors += adapter->irx_pcb.data.netstat.err_align; 808 adapter->stats.rx_fifo_errors += adapter->irx_pcb.data.netstat.err_ovrrun; 809 adapter->stats.rx_over_errors += adapter->irx_pcb.data.netstat.err_res; 810 adapter->got[CMD_NETWORK_STATISTICS] = 1; 811 if (elp_debug >= 3) 812 printk("%s: interrupt - statistics response received\n", dev->name); 813 break; 814 815 /* 816 * sent a packet 817 */ 818 case CMD_TRANSMIT_PACKET_COMPLETE: 819 if (elp_debug >= 3) 820 printk("%s: interrupt - packet sent\n", dev->name); 821 if (!netif_running(dev)) 822 break; 823 switch (adapter->irx_pcb.data.xmit_resp.c_stat) { 824 case 0xffff: 825 adapter->stats.tx_aborted_errors++; 826 printk(KERN_INFO "%s: transmit timed out, network cable problem?\n", dev->name); 827 break; 828 case 0xfffe: 829 adapter->stats.tx_fifo_errors++; 830 printk(KERN_INFO "%s: transmit timed out, FIFO underrun\n", dev->name); 831 break; 832 } 833 netif_wake_queue(dev); 834 break; 835 836 /* 837 * some unknown PCB 838 */ 839 default: 840 printk(KERN_DEBUG "%s: unknown PCB received - %2.2x\n", dev->name, adapter->irx_pcb.command); 841 break; 842 } 843 } else { 844 printk("%s: failed to read PCB on interrupt\n", dev->name); 845 adapter_reset(dev); 846 } 847 } 848 849 } while (icount++ < 5 && (inb_status(dev->base_addr) & (ACRF | DONE))); 850 851 prime_rx(dev); 852 853 /* 854 * indicate no longer in interrupt routine 855 */ 856 spin_unlock(&adapter->lock); 857} 858 859 860/****************************************************** 861 * 862 * open the board 863 * 864 ******************************************************/ 865 866static int elp_open(struct net_device *dev) 867{ 868 elp_device *adapter; 869 int retval; 870 871 adapter = dev->priv; 872 873 if (elp_debug >= 3) 874 printk("%s: request to open device\n", dev->name); 875 876 /* 877 * make sure we actually found the device 878 */ 879 if (adapter == NULL) { 880 printk("%s: Opening a non-existent physical device\n", dev->name); 881 return -EAGAIN; 882 } 883 /* 884 * disable interrupts on the board 885 */ 886 outb_control(0, dev); 887 888 /* 889 * clear any pending interrupts 890 */ 891 inb_command(dev->base_addr); 892 adapter_reset(dev); 893 894 /* 895 * no receive PCBs active 896 */ 897 adapter->rx_active = 0; 898 899 adapter->busy = 0; 900 adapter->send_pcb_semaphore = 0; 901 adapter->rx_backlog.in = 0; 902 adapter->rx_backlog.out = 0; 903 904 spin_lock_init(&adapter->lock); 905 906 /* 907 * install our interrupt service routine 908 */ 909 if ((retval = request_irq(dev->irq, &elp_interrupt, 0, dev->name, dev))) { 910 printk(KERN_ERR "%s: could not allocate IRQ%d\n", dev->name, dev->irq); 911 return retval; 912 } 913 if ((retval = request_dma(dev->dma, dev->name))) { 914 free_irq(dev->irq, dev); 915 printk(KERN_ERR "%s: could not allocate DMA%d channel\n", dev->name, dev->dma); 916 return retval; 917 } 918 adapter->dma_buffer = (void *) dma_mem_alloc(DMA_BUFFER_SIZE); 919 if (!adapter->dma_buffer) { 920 printk(KERN_ERR "%s: could not allocate DMA buffer\n", dev->name); 921 free_dma(dev->dma); 922 free_irq(dev->irq, dev); 923 return -ENOMEM; 924 } 925 adapter->dmaing = 0; 926 927 /* 928 * enable interrupts on the board 929 */ 930 outb_control(CMDE, dev); 931 932 /* 933 * configure adapter memory: we need 10 multicast addresses, default==0 934 */ 935 if (elp_debug >= 3) 936 printk(KERN_DEBUG "%s: sending 3c505 memory configuration command\n", dev->name); 937 adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY; 938 adapter->tx_pcb.data.memconf.cmd_q = 10; 939 adapter->tx_pcb.data.memconf.rcv_q = 20; 940 adapter->tx_pcb.data.memconf.mcast = 10; 941 adapter->tx_pcb.data.memconf.frame = 20; 942 adapter->tx_pcb.data.memconf.rcv_b = 20; 943 adapter->tx_pcb.data.memconf.progs = 0; 944 adapter->tx_pcb.length = sizeof(struct Memconf); 945 adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] = 0; 946 if (!send_pcb(dev, &adapter->tx_pcb)) 947 printk("%s: couldn't send memory configuration command\n", dev->name); 948 else { 949 int timeout = jiffies + TIMEOUT; 950 while (adapter->got[CMD_CONFIGURE_ADAPTER_MEMORY] == 0 && time_before(jiffies, timeout)); 951 if (time_after_eq(jiffies, timeout)) 952 TIMEOUT_MSG(__LINE__); 953 } 954 955 956 /* 957 * configure adapter to receive broadcast messages and wait for response 958 */ 959 if (elp_debug >= 3) 960 printk("%s: sending 82586 configure command\n", dev->name); 961 adapter->tx_pcb.command = CMD_CONFIGURE_82586; 962 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD; 963 adapter->tx_pcb.length = 2; 964 adapter->got[CMD_CONFIGURE_82586] = 0; 965 if (!send_pcb(dev, &adapter->tx_pcb)) 966 printk("%s: couldn't send 82586 configure command\n", dev->name); 967 else { 968 int timeout = jiffies + TIMEOUT; 969 while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout)); 970 if (time_after_eq(jiffies, timeout)) 971 TIMEOUT_MSG(__LINE__); 972 } 973 974 /* enable burst-mode DMA */ 975 /* outb(0x1, dev->base_addr + PORT_AUXDMA); */ 976 977 /* 978 * queue receive commands to provide buffering 979 */ 980 prime_rx(dev); 981 if (elp_debug >= 3) 982 printk("%s: %d receive PCBs active\n", dev->name, adapter->rx_active); 983 984 /* 985 * device is now officially open! 986 */ 987 988 netif_start_queue(dev); 989 return 0; 990} 991 992 993/****************************************************** 994 * 995 * send a packet to the adapter 996 * 997 ******************************************************/ 998 999static int send_packet(struct net_device *dev, struct sk_buff *skb) 1000{ 1001 elp_device *adapter = dev->priv; 1002 unsigned long target; 1003 unsigned long flags; 1004 1005 /* 1006 * make sure the length is even and no shorter than 60 bytes 1007 */ 1008 unsigned int nlen = (((skb->len < 60) ? 60 : skb->len) + 1) & (~1); 1009 1010 if (test_and_set_bit(0, (void *) &adapter->busy)) { 1011 if (elp_debug >= 2) 1012 printk("%s: transmit blocked\n", dev->name); 1013 return FALSE; 1014 } 1015 1016 adapter->stats.tx_bytes += nlen; 1017 1018 /* 1019 * send the adapter a transmit packet command. Ignore segment and offset 1020 * and make sure the length is even 1021 */ 1022 adapter->tx_pcb.command = CMD_TRANSMIT_PACKET; 1023 adapter->tx_pcb.length = sizeof(struct Xmit_pkt); 1024 adapter->tx_pcb.data.xmit_pkt.buf_ofs 1025 = adapter->tx_pcb.data.xmit_pkt.buf_seg = 0; /* Unused */ 1026 adapter->tx_pcb.data.xmit_pkt.pkt_len = nlen; 1027 1028 if (!send_pcb(dev, &adapter->tx_pcb)) { 1029 adapter->busy = 0; 1030 return FALSE; 1031 } 1032 /* if this happens, we die */ 1033 if (test_and_set_bit(0, (void *) &adapter->dmaing)) 1034 printk("%s: tx: DMA %d in progress\n", dev->name, adapter->current_dma.direction); 1035 1036 adapter->current_dma.direction = 1; 1037 adapter->current_dma.start_time = jiffies; 1038 1039 if ((unsigned long)(skb->data + nlen) >= MAX_DMA_ADDRESS) { 1040 memcpy(adapter->dma_buffer, skb->data, nlen); 1041 target = virt_to_bus(adapter->dma_buffer); 1042 } 1043 else { 1044 target = virt_to_bus(skb->data); 1045 } 1046 adapter->current_dma.skb = skb; 1047 1048 flags=claim_dma_lock(); 1049 disable_dma(dev->dma); 1050 clear_dma_ff(dev->dma); 1051 set_dma_mode(dev->dma, 0x48); /* dma memory -> io */ 1052 set_dma_addr(dev->dma, target); 1053 set_dma_count(dev->dma, nlen); 1054 outb_control(adapter->hcr_val | DMAE | TCEN, dev); 1055 enable_dma(dev->dma); 1056 release_dma_lock(flags); 1057 1058 if (elp_debug >= 3) 1059 printk("%s: DMA transfer started\n", dev->name); 1060 1061 return TRUE; 1062} 1063 1064/* 1065 * The upper layer thinks we timed out 1066 */ 1067 1068static void elp_timeout(struct net_device *dev) 1069{ 1070 elp_device *adapter = dev->priv; 1071 int stat; 1072 1073 stat = inb_status(dev->base_addr); 1074 printk(KERN_WARNING "%s: transmit timed out, lost %s?\n", dev->name, (stat & ACRF) ? "interrupt" : "command"); 1075 if (elp_debug >= 1) 1076 printk("%s: status %#02x\n", dev->name, stat); 1077 dev->trans_start = jiffies; 1078 adapter->stats.tx_dropped++; 1079 netif_wake_queue(dev); 1080} 1081 1082/****************************************************** 1083 * 1084 * start the transmitter 1085 * return 0 if sent OK, else return 1 1086 * 1087 ******************************************************/ 1088 1089static int elp_start_xmit(struct sk_buff *skb, struct net_device *dev) 1090{ 1091 unsigned long flags; 1092 elp_device *adapter = dev->priv; 1093 1094 spin_lock_irqsave(&adapter->lock, flags); 1095 check_3c505_dma(dev); 1096 1097 if (elp_debug >= 3) 1098 printk("%s: request to send packet of length %d\n", dev->name, (int) skb->len); 1099 1100 netif_stop_queue(dev); 1101 1102 /* 1103 * send the packet at skb->data for skb->len 1104 */ 1105 if (!send_packet(dev, skb)) { 1106 if (elp_debug >= 2) { 1107 printk("%s: failed to transmit packet\n", dev->name); 1108 } 1109 spin_unlock_irqrestore(&adapter->lock, flags); 1110 return 1; 1111 } 1112 if (elp_debug >= 3) 1113 printk("%s: packet of length %d sent\n", dev->name, (int) skb->len); 1114 1115 /* 1116 * start the transmit timeout 1117 */ 1118 dev->trans_start = jiffies; 1119 1120 prime_rx(dev); 1121 spin_unlock_irqrestore(&adapter->lock, flags); 1122 netif_start_queue(dev); 1123 return 0; 1124} 1125 1126/****************************************************** 1127 * 1128 * return statistics on the board 1129 * 1130 ******************************************************/ 1131 1132static struct net_device_stats *elp_get_stats(struct net_device *dev) 1133{ 1134 elp_device *adapter = (elp_device *) dev->priv; 1135 1136 if (elp_debug >= 3) 1137 printk("%s: request for stats\n", dev->name); 1138 1139 /* If the device is closed, just return the latest stats we have, 1140 - we cannot ask from the adapter without interrupts */ 1141 if (!netif_running(dev)) 1142 return &adapter->stats; 1143 1144 /* send a get statistics command to the board */ 1145 adapter->tx_pcb.command = CMD_NETWORK_STATISTICS; 1146 adapter->tx_pcb.length = 0; 1147 adapter->got[CMD_NETWORK_STATISTICS] = 0; 1148 if (!send_pcb(dev, &adapter->tx_pcb)) 1149 printk("%s: couldn't send get statistics command\n", dev->name); 1150 else { 1151 int timeout = jiffies + TIMEOUT; 1152 while (adapter->got[CMD_NETWORK_STATISTICS] == 0 && time_before(jiffies, timeout)); 1153 if (time_after_eq(jiffies, timeout)) { 1154 TIMEOUT_MSG(__LINE__); 1155 return &adapter->stats; 1156 } 1157 } 1158 1159 /* statistics are now up to date */ 1160 return &adapter->stats; 1161} 1162 1163/****************************************************** 1164 * 1165 * close the board 1166 * 1167 ******************************************************/ 1168 1169static int elp_close(struct net_device *dev) 1170{ 1171 elp_device *adapter; 1172 1173 adapter = dev->priv; 1174 1175 if (elp_debug >= 3) 1176 printk("%s: request to close device\n", dev->name); 1177 1178 netif_stop_queue(dev); 1179 1180 /* Someone may request the device statistic information even when 1181 * the interface is closed. The following will update the statistics 1182 * structure in the driver, so we'll be able to give current statistics. 1183 */ 1184 (void) elp_get_stats(dev); 1185 1186 /* 1187 * disable interrupts on the board 1188 */ 1189 outb_control(0, dev); 1190 1191 /* 1192 * release the IRQ 1193 */ 1194 free_irq(dev->irq, dev); 1195 1196 free_dma(dev->dma); 1197 free_pages((unsigned long) adapter->dma_buffer, get_order(DMA_BUFFER_SIZE)); 1198 1199 return 0; 1200} 1201 1202 1203/************************************************************ 1204 * 1205 * Set multicast list 1206 * num_addrs==0: clear mc_list 1207 * num_addrs==-1: set promiscuous mode 1208 * num_addrs>0: set mc_list 1209 * 1210 ************************************************************/ 1211 1212static void elp_set_mc_list(struct net_device *dev) 1213{ 1214 elp_device *adapter = (elp_device *) dev->priv; 1215 struct dev_mc_list *dmi = dev->mc_list; 1216 int i; 1217 unsigned long flags; 1218 1219 if (elp_debug >= 3) 1220 printk("%s: request to set multicast list\n", dev->name); 1221 1222 spin_lock_irqsave(&adapter->lock, flags); 1223 1224 if (!(dev->flags & (IFF_PROMISC | IFF_ALLMULTI))) { 1225 /* send a "load multicast list" command to the board, max 10 addrs/cmd */ 1226 /* if num_addrs==0 the list will be cleared */ 1227 adapter->tx_pcb.command = CMD_LOAD_MULTICAST_LIST; 1228 adapter->tx_pcb.length = 6 * dev->mc_count; 1229 for (i = 0; i < dev->mc_count; i++) { 1230 memcpy(adapter->tx_pcb.data.multicast[i], dmi->dmi_addr, 6); 1231 dmi = dmi->next; 1232 } 1233 adapter->got[CMD_LOAD_MULTICAST_LIST] = 0; 1234 if (!send_pcb(dev, &adapter->tx_pcb)) 1235 printk("%s: couldn't send set_multicast command\n", dev->name); 1236 else { 1237 int timeout = jiffies + TIMEOUT; 1238 while (adapter->got[CMD_LOAD_MULTICAST_LIST] == 0 && time_before(jiffies, timeout)); 1239 if (time_after_eq(jiffies, timeout)) { 1240 TIMEOUT_MSG(__LINE__); 1241 } 1242 } 1243 if (dev->mc_count) 1244 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD | RECV_MULTI; 1245 else /* num_addrs == 0 */ 1246 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_BROAD; 1247 } else 1248 adapter->tx_pcb.data.configure = NO_LOOPBACK | RECV_PROMISC; 1249 /* 1250 * configure adapter to receive messages (as specified above) 1251 * and wait for response 1252 */ 1253 if (elp_debug >= 3) 1254 printk("%s: sending 82586 configure command\n", dev->name); 1255 adapter->tx_pcb.command = CMD_CONFIGURE_82586; 1256 adapter->tx_pcb.length = 2; 1257 adapter->got[CMD_CONFIGURE_82586] = 0; 1258 if (!send_pcb(dev, &adapter->tx_pcb)) 1259 { 1260 spin_unlock_irqrestore(&adapter->lock, flags); 1261 printk("%s: couldn't send 82586 configure command\n", dev->name); 1262 } 1263 else { 1264 int timeout = jiffies + TIMEOUT; 1265 spin_unlock_irqrestore(&adapter->lock, flags); 1266 while (adapter->got[CMD_CONFIGURE_82586] == 0 && time_before(jiffies, timeout)); 1267 if (time_after_eq(jiffies, timeout)) 1268 TIMEOUT_MSG(__LINE__); 1269 } 1270} 1271 1272/** 1273 * netdev_ethtool_ioctl: Handle network interface SIOCETHTOOL ioctls 1274 * @dev: network interface on which out-of-band action is to be performed 1275 * @useraddr: userspace address to which data is to be read and returned 1276 * 1277 * Process the various commands of the SIOCETHTOOL interface. 1278 */ 1279 1280static int netdev_ethtool_ioctl (struct net_device *dev, void *useraddr) 1281{ 1282 u32 ethcmd; 1283 1284 /* dev_ioctl() in ../../net/core/dev.c has already checked 1285 capable(CAP_NET_ADMIN), so don't bother with that here. */ 1286 1287 if (get_user(ethcmd, (u32 *)useraddr)) 1288 return -EFAULT; 1289 1290 switch (ethcmd) { 1291 1292 case ETHTOOL_GDRVINFO: { 1293 struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO }; 1294 strcpy (info.driver, DRV_NAME); 1295 strcpy (info.version, DRV_VERSION); 1296 sprintf(info.bus_info, "ISA 0x%lx", dev->base_addr); 1297 if (copy_to_user (useraddr, &info, sizeof (info))) 1298 return -EFAULT; 1299 return 0; 1300 } 1301 1302 /* get message-level */ 1303 case ETHTOOL_GMSGLVL: { 1304 struct ethtool_value edata = {ETHTOOL_GMSGLVL}; 1305 edata.data = debug; 1306 if (copy_to_user(useraddr, &edata, sizeof(edata))) 1307 return -EFAULT; 1308 return 0; 1309 } 1310 /* set message-level */ 1311 case ETHTOOL_SMSGLVL: { 1312 struct ethtool_value edata; 1313 if (copy_from_user(&edata, useraddr, sizeof(edata))) 1314 return -EFAULT; 1315 debug = edata.data; 1316 return 0; 1317 } 1318 1319 default: 1320 break; 1321 } 1322 1323 return -EOPNOTSUPP; 1324} 1325 1326/** 1327 * netdev_ioctl: Handle network interface ioctls 1328 * @dev: network interface on which out-of-band action is to be performed 1329 * @rq: user request data 1330 * @cmd: command issued by user 1331 * 1332 * Process the various out-of-band ioctls passed to this driver. 1333 */ 1334 1335static int netdev_ioctl (struct net_device *dev, struct ifreq *rq, int cmd) 1336{ 1337 int rc = 0; 1338 1339 switch (cmd) { 1340 case SIOCETHTOOL: 1341 rc = netdev_ethtool_ioctl(dev, (void *) rq->ifr_data); 1342 break; 1343 1344 default: 1345 rc = -EOPNOTSUPP; 1346 break; 1347 } 1348 1349 return rc; 1350} 1351 1352 1353/****************************************************** 1354 * 1355 * initialise Etherlink Plus board 1356 * 1357 ******************************************************/ 1358 1359static inline void elp_init(struct net_device *dev) 1360{ 1361 elp_device *adapter = dev->priv; 1362 1363 /* 1364 * set ptrs to various functions 1365 */ 1366 dev->open = elp_open; /* local */ 1367 dev->stop = elp_close; /* local */ 1368 dev->get_stats = elp_get_stats; /* local */ 1369 dev->hard_start_xmit = elp_start_xmit; /* local */ 1370 dev->tx_timeout = elp_timeout; /* local */ 1371 dev->watchdog_timeo = 10*HZ; 1372 dev->set_multicast_list = elp_set_mc_list; /* local */ 1373 dev->do_ioctl = netdev_ioctl; /* local */ 1374 1375 /* Setup the generic properties */ 1376 ether_setup(dev); 1377 1378 /* 1379 * setup ptr to adapter specific information 1380 */ 1381 memset(&(adapter->stats), 0, sizeof(struct net_device_stats)); 1382 1383 /* 1384 * memory information 1385 */ 1386 dev->mem_start = dev->mem_end = dev->rmem_end = dev->rmem_start = 0; 1387} 1388 1389/************************************************************ 1390 * 1391 * A couple of tests to see if there's 3C505 or not 1392 * Called only by elp_autodetect 1393 ************************************************************/ 1394 1395static int __init elp_sense(struct net_device *dev) 1396{ 1397 int timeout; 1398 int addr = dev->base_addr; 1399 const char *name = dev->name; 1400 unsigned long flags; 1401 byte orig_HSR; 1402 1403 if (!request_region(addr, ELP_IO_EXTENT, "3c505")) 1404 return -ENODEV; 1405 1406 orig_HSR = inb_status(addr); 1407 1408 if (elp_debug > 0) 1409 printk(search_msg, name, addr); 1410 1411 if (orig_HSR == 0xff) { 1412 if (elp_debug > 0) 1413 printk(notfound_msg, 1); 1414 goto out; 1415 } 1416 /* Enable interrupts - we need timers! */ 1417 save_flags(flags); 1418 sti(); 1419 1420 /* Wait for a while; the adapter may still be booting up */ 1421 if (elp_debug > 0) 1422 printk(stilllooking_msg); 1423 1424 if (orig_HSR & DIR) { 1425 /* If HCR.DIR is up, we pull it down. HSR.DIR should follow. */ 1426 outb(0, dev->base_addr + PORT_CONTROL); 1427 timeout = jiffies + 30*HZ/100; 1428 while (time_before(jiffies, timeout)); 1429 restore_flags(flags); 1430 if (inb_status(addr) & DIR) { 1431 if (elp_debug > 0) 1432 printk(notfound_msg, 2); 1433 goto out; 1434 } 1435 } else { 1436 /* If HCR.DIR is down, we pull it up. HSR.DIR should follow. */ 1437 outb(DIR, dev->base_addr + PORT_CONTROL); 1438 timeout = jiffies + 30*HZ/100; 1439 while (time_before(jiffies, timeout)); 1440 restore_flags(flags); 1441 if (!(inb_status(addr) & DIR)) { 1442 if (elp_debug > 0) 1443 printk(notfound_msg, 3); 1444 goto out; 1445 } 1446 } 1447 /* 1448 * It certainly looks like a 3c505. 1449 */ 1450 if (elp_debug > 0) 1451 printk(found_msg); 1452 1453 return 0; 1454out: 1455 release_region(addr, ELP_IO_EXTENT); 1456 return -ENODEV; 1457} 1458 1459/************************************************************* 1460 * 1461 * Search through addr_list[] and try to find a 3C505 1462 * Called only by eplus_probe 1463 *************************************************************/ 1464 1465static int __init elp_autodetect(struct net_device *dev) 1466{ 1467 int idx = 0; 1468 1469 /* if base address set, then only check that address 1470 otherwise, run through the table */ 1471 if (dev->base_addr != 0) { /* dev->base_addr == 0 ==> plain autodetect */ 1472 if (elp_sense(dev) == 0) 1473 return dev->base_addr; 1474 } else 1475 while ((dev->base_addr = addr_list[idx++])) { 1476 if (elp_sense(dev) == 0) 1477 return dev->base_addr; 1478 } 1479 1480 /* could not find an adapter */ 1481 if (elp_debug > 0) 1482 printk(couldnot_msg, dev->name); 1483 1484 return 0; /* Because of this, the layer above will return -ENODEV */ 1485} 1486 1487 1488/****************************************************** 1489 * 1490 * probe for an Etherlink Plus board at the specified address 1491 * 1492 ******************************************************/ 1493 1494/* There are three situations we need to be able to detect here: 1495 1496 * a) the card is idle 1497 * b) the card is still booting up 1498 * c) the card is stuck in a strange state (some DOS drivers do this) 1499 * 1500 * In case (a), all is well. In case (b), we wait 10 seconds to see if the 1501 * card finishes booting, and carry on if so. In case (c), we do a hard reset, 1502 * loop round, and hope for the best. 1503 * 1504 * This is all very unpleasant, but hopefully avoids the problems with the old 1505 * probe code (which had a 15-second delay if the card was idle, and didn't 1506 * work at all if it was in a weird state). 1507 */ 1508 1509int __init elplus_probe(struct net_device *dev) 1510{ 1511 elp_device *adapter; 1512 int i, tries, tries1, timeout, okay; 1513 unsigned long cookie = 0; 1514 1515 SET_MODULE_OWNER(dev); 1516 1517 /* 1518 * setup adapter structure 1519 */ 1520 1521 dev->base_addr = elp_autodetect(dev); 1522 if (!(dev->base_addr)) 1523 return -ENODEV; 1524 1525 /* 1526 * setup ptr to adapter specific information 1527 */ 1528 adapter = (elp_device *) (dev->priv = kmalloc(sizeof(elp_device), GFP_KERNEL)); 1529 if (adapter == NULL) { 1530 printk("%s: out of memory\n", dev->name); 1531 return -ENODEV; 1532 } 1533 1534 adapter->send_pcb_semaphore = 0; 1535 1536 for (tries1 = 0; tries1 < 3; tries1++) { 1537 outb_control((adapter->hcr_val | CMDE) & ~DIR, dev); 1538 /* First try to write just one byte, to see if the card is 1539 * responding at all normally. 1540 */ 1541 timeout = jiffies + 5*HZ/100; 1542 okay = 0; 1543 while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE)); 1544 if ((inb_status(dev->base_addr) & HCRE)) { 1545 outb_command(0, dev->base_addr); /* send a spurious byte */ 1546 timeout = jiffies + 5*HZ/100; 1547 while (time_before(jiffies, timeout) && !(inb_status(dev->base_addr) & HCRE)); 1548 if (inb_status(dev->base_addr) & HCRE) 1549 okay = 1; 1550 } 1551 if (!okay) { 1552 /* Nope, it's ignoring the command register. This means that 1553 * either it's still booting up, or it's died. 1554 */ 1555 printk("%s: command register wouldn't drain, ", dev->name); 1556 if ((inb_status(dev->base_addr) & 7) == 3) { 1557 /* If the adapter status is 3, it *could* still be booting. 1558 * Give it the benefit of the doubt for 10 seconds. 1559 */ 1560 printk("assuming 3c505 still starting\n"); 1561 timeout = jiffies + 10*HZ; 1562 while (time_before(jiffies, timeout) && (inb_status(dev->base_addr) & 7)); 1563 if (inb_status(dev->base_addr) & 7) { 1564 printk("%s: 3c505 failed to start\n", dev->name); 1565 } else { 1566 okay = 1; /* It started */ 1567 } 1568 } else { 1569 /* Otherwise, it must just be in a strange 1570 * state. We probably need to kick it. 1571 */ 1572 printk("3c505 is sulking\n"); 1573 } 1574 } 1575 for (tries = 0; tries < 5 && okay; tries++) { 1576 1577 /* 1578 * Try to set the Ethernet address, to make sure that the board 1579 * is working. 1580 */ 1581 adapter->tx_pcb.command = CMD_STATION_ADDRESS; 1582 adapter->tx_pcb.length = 0; 1583 cookie = probe_irq_on(); 1584 if (!send_pcb(dev, &adapter->tx_pcb)) { 1585 printk("%s: could not send first PCB\n", dev->name); 1586 probe_irq_off(cookie); 1587 continue; 1588 } 1589 if (!receive_pcb(dev, &adapter->rx_pcb)) { 1590 printk("%s: could not read first PCB\n", dev->name); 1591 probe_irq_off(cookie); 1592 continue; 1593 } 1594 if ((adapter->rx_pcb.command != CMD_ADDRESS_RESPONSE) || 1595 (adapter->rx_pcb.length != 6)) { 1596 printk("%s: first PCB wrong (%d, %d)\n", dev->name, adapter->rx_pcb.command, adapter->rx_pcb.length); 1597 probe_irq_off(cookie); 1598 continue; 1599 } 1600 goto okay; 1601 } 1602 /* It's broken. Do a hard reset to re-initialise the board, 1603 * and try again. 1604 */ 1605 printk(KERN_INFO "%s: resetting adapter\n", dev->name); 1606 outb_control(adapter->hcr_val | FLSH | ATTN, dev); 1607 outb_control(adapter->hcr_val & ~(FLSH | ATTN), dev); 1608 } 1609 printk("%s: failed to initialise 3c505\n", dev->name); 1610 release_region(dev->base_addr, ELP_IO_EXTENT); 1611 return -ENODEV; 1612 1613 okay: 1614 if (dev->irq) { /* Is there a preset IRQ? */ 1615 int rpt = probe_irq_off(cookie); 1616 if (dev->irq != rpt) { 1617 printk("%s: warning, irq %d configured but %d detected\n", dev->name, dev->irq, rpt); 1618 } 1619 /* if dev->irq == probe_irq_off(cookie), all is well */ 1620 } else /* No preset IRQ; just use what we can detect */ 1621 dev->irq = probe_irq_off(cookie); 1622 switch (dev->irq) { /* Legal, sane? */ 1623 case 0: 1624 printk("%s: IRQ probe failed: check 3c505 jumpers.\n", 1625 dev->name); 1626 return -ENODEV; 1627 case 1: 1628 case 6: 1629 case 8: 1630 case 13: 1631 printk("%s: Impossible IRQ %d reported by probe_irq_off().\n", 1632 dev->name, dev->irq); 1633 return -ENODEV; 1634 } 1635 /* 1636 * Now we have the IRQ number so we can disable the interrupts from 1637 * the board until the board is opened. 1638 */ 1639 outb_control(adapter->hcr_val & ~CMDE, dev); 1640 1641 /* 1642 * copy Ethernet address into structure 1643 */ 1644 for (i = 0; i < 6; i++) 1645 dev->dev_addr[i] = adapter->rx_pcb.data.eth_addr[i]; 1646 1647 /* find a DMA channel */ 1648 if (!dev->dma) { 1649 if (dev->mem_start) { 1650 dev->dma = dev->mem_start & 7; 1651 } 1652 else { 1653 printk(KERN_WARNING "%s: warning, DMA channel not specified, using default\n", dev->name); 1654 dev->dma = ELP_DMA; 1655 } 1656 } 1657 1658 /* 1659 * print remainder of startup message 1660 */ 1661 printk("%s: 3c505 at %#lx, irq %d, dma %d, ", 1662 dev->name, dev->base_addr, dev->irq, dev->dma); 1663 printk("addr %02x:%02x:%02x:%02x:%02x:%02x, ", 1664 dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2], 1665 dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]); 1666 1667 /* 1668 * read more information from the adapter 1669 */ 1670 1671 adapter->tx_pcb.command = CMD_ADAPTER_INFO; 1672 adapter->tx_pcb.length = 0; 1673 if (!send_pcb(dev, &adapter->tx_pcb) || 1674 !receive_pcb(dev, &adapter->rx_pcb) || 1675 (adapter->rx_pcb.command != CMD_ADAPTER_INFO_RESPONSE) || 1676 (adapter->rx_pcb.length != 10)) { 1677 printk("not responding to second PCB\n"); 1678 } 1679 printk("rev %d.%d, %dk\n", adapter->rx_pcb.data.info.major_vers, adapter->rx_pcb.data.info.minor_vers, adapter->rx_pcb.data.info.RAM_sz); 1680 1681 /* 1682 * reconfigure the adapter memory to better suit our purposes 1683 */ 1684 adapter->tx_pcb.command = CMD_CONFIGURE_ADAPTER_MEMORY; 1685 adapter->tx_pcb.length = 12; 1686 adapter->tx_pcb.data.memconf.cmd_q = 8; 1687 adapter->tx_pcb.data.memconf.rcv_q = 8; 1688 adapter->tx_pcb.data.memconf.mcast = 10; 1689 adapter->tx_pcb.data.memconf.frame = 10; 1690 adapter->tx_pcb.data.memconf.rcv_b = 10; 1691 adapter->tx_pcb.data.memconf.progs = 0; 1692 if (!send_pcb(dev, &adapter->tx_pcb) || 1693 !receive_pcb(dev, &adapter->rx_pcb) || 1694 (adapter->rx_pcb.command != CMD_CONFIGURE_ADAPTER_RESPONSE) || 1695 (adapter->rx_pcb.length != 2)) { 1696 printk("%s: could not configure adapter memory\n", dev->name); 1697 } 1698 if (adapter->rx_pcb.data.configure) { 1699 printk("%s: adapter configuration failed\n", dev->name); 1700 } 1701 1702 /* 1703 * initialise the device 1704 */ 1705 elp_init(dev); 1706 1707 return 0; 1708} 1709 1710#ifdef MODULE 1711static struct net_device dev_3c505[ELP_MAX_CARDS]; 1712static int io[ELP_MAX_CARDS]; 1713static int irq[ELP_MAX_CARDS]; 1714static int dma[ELP_MAX_CARDS]; 1715MODULE_PARM(io, "1-" __MODULE_STRING(ELP_MAX_CARDS) "i"); 1716MODULE_PARM(irq, "1-" __MODULE_STRING(ELP_MAX_CARDS) "i"); 1717MODULE_PARM(dma, "1-" __MODULE_STRING(ELP_MAX_CARDS) "i"); 1718MODULE_PARM_DESC(io, "EtherLink Plus I/O base address(es)"); 1719MODULE_PARM_DESC(irq, "EtherLink Plus IRQ number(s) (assigned)"); 1720MODULE_PARM_DESC(dma, "EtherLink Plus DMA channel(s)"); 1721 1722int init_module(void) 1723{ 1724 int this_dev, found = 0; 1725 1726 for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) { 1727 struct net_device *dev = &dev_3c505[this_dev]; 1728 dev->irq = irq[this_dev]; 1729 dev->base_addr = io[this_dev]; 1730 dev->init = elplus_probe; 1731 if (dma[this_dev]) { 1732 dev->dma = dma[this_dev]; 1733 } else { 1734 dev->dma = ELP_DMA; 1735 printk(KERN_WARNING "3c505.c: warning, using default DMA channel,\n"); 1736 } 1737 if (io[this_dev] == 0) { 1738 if (this_dev) break; 1739 printk(KERN_NOTICE "3c505.c: module autoprobe not recommended, give io=xx.\n"); 1740 } 1741 if (register_netdev(dev) != 0) { 1742 printk(KERN_WARNING "3c505.c: Failed to register card at 0x%x.\n", io[this_dev]); 1743 if (found != 0) return 0; 1744 return -ENXIO; 1745 } 1746 found++; 1747 } 1748 return 0; 1749} 1750 1751void cleanup_module(void) 1752{ 1753 int this_dev; 1754 1755 for (this_dev = 0; this_dev < ELP_MAX_CARDS; this_dev++) { 1756 struct net_device *dev = &dev_3c505[this_dev]; 1757 if (dev->priv != NULL) { 1758 unregister_netdev(dev); 1759 kfree(dev->priv); 1760 dev->priv = NULL; 1761 release_region(dev->base_addr, ELP_IO_EXTENT); 1762 } 1763 } 1764} 1765 1766#endif /* MODULE */ 1767MODULE_LICENSE("GPL"); 1768