1 /*------------------------------------------------------------------------ 2 . smc9194.c 3 . This is a driver for SMC's 9000 series of Ethernet cards. 4 . 5 . Copyright (C) 1996 by Erik Stahlman 6 . This software may be used and distributed according to the terms 7 . of the GNU General Public License, incorporated herein by reference. 8 . 9 . "Features" of the SMC chip: 10 . 4608 byte packet memory. ( for the 91C92. Others have more ) 11 . EEPROM for configuration 12 . AUI/TP selection ( mine has 10Base2/10BaseT select ) 13 . 14 . Arguments: 15 . io = for the base address 16 . irq = for the IRQ 17 . ifport = 0 for autodetect, 1 for TP, 2 for AUI ( or 10base2 ) 18 . 19 . author: 20 . Erik Stahlman ( erik@vt.edu ) 21 . contributors: 22 . Arnaldo Carvalho de Melo <acme@conectiva.com.br> 23 . 24 . Hardware multicast code from Peter Cammaert ( pc@denkart.be ) 25 . 26 . Sources: 27 . o SMC databook 28 . o skeleton.c by Donald Becker ( becker@scyld.com ) 29 . o ( a LOT of advice from Becker as well ) 30 . 31 . History: 32 . 12/07/95 Erik Stahlman written, got receive/xmit handled 33 . 01/03/96 Erik Stahlman worked out some bugs, actually usable!!! :-) 34 . 01/06/96 Erik Stahlman cleaned up some, better testing, etc 35 . 01/29/96 Erik Stahlman fixed autoirq, added multicast 36 . 02/01/96 Erik Stahlman 1. disabled all interrupts in smc_reset 37 . 2. got rid of post-decrementing bug -- UGH. 38 . 02/13/96 Erik Stahlman Tried to fix autoirq failure. Added more 39 . descriptive error messages. 40 . 02/15/96 Erik Stahlman Fixed typo that caused detection failure 41 . 02/23/96 Erik Stahlman Modified it to fit into kernel tree 42 . Added support to change hardware address 43 . Cleared stats on opens 44 . 02/26/96 Erik Stahlman Trial support for Kernel 1.2.13 45 . Kludge for automatic IRQ detection 46 . 03/04/96 Erik Stahlman Fixed kernel 1.3.70 + 47 . Fixed bug reported by Gardner Buchanan in 48 . smc_enable, with outw instead of outb 49 . 03/06/96 Erik Stahlman Added hardware multicast from Peter Cammaert 50 . 04/14/00 Heiko Pruessing (SMA Regelsysteme) Fixed bug in chip memory 51 . allocation 52 . 08/20/00 Arnaldo Melo fix kfree(skb) in smc_hardware_send_packet 53 . 12/15/00 Christian Jullien fix "Warning: kfree_skb on hard IRQ" 54 . 11/08/01 Matt Domsch Use common crc32 function 55 ----------------------------------------------------------------------------*/ 56 57 static const char version[] = 58 "smc9194.c:v0.14 12/15/00 by Erik Stahlman (erik@vt.edu)"; 59 60 #include <linux/module.h> 61 #include <linux/kernel.h> 62 #include <linux/types.h> 63 #include <linux/fcntl.h> 64 #include <linux/interrupt.h> 65 #include <linux/ioport.h> 66 #include <linux/in.h> 67 #include <linux/string.h> 68 #include <linux/init.h> 69 #include <linux/crc32.h> 70 #include <linux/errno.h> 71 #include <linux/netdevice.h> 72 #include <linux/etherdevice.h> 73 #include <linux/skbuff.h> 74 #include <linux/bitops.h> 75 76 #include <asm/io.h> 77 78 #include "smc9194.h" 79 80 #define DRV_NAME "smc9194" 81 82 /*------------------------------------------------------------------------ 83 . 84 . Configuration options, for the experienced user to change. 85 . 86 -------------------------------------------------------------------------*/ 87 88 /* 89 . Do you want to use 32 bit xfers? This should work on all chips, as 90 . the chipset is designed to accommodate them. 91 */ 92 #ifdef __sh__ 93 #undef USE_32_BIT 94 #else 95 #define USE_32_BIT 1 96 #endif 97 98 /* 99 .the SMC9194 can be at any of the following port addresses. To change, 100 .for a slightly different card, you can add it to the array. Keep in 101 .mind that the array must end in zero. 102 */ 103 104 struct devlist { 105 unsigned int port; 106 unsigned int irq; 107 }; 108 109 static struct devlist smc_devlist[] __initdata = { 110 {.port = 0x200, .irq = 0}, 111 {.port = 0x220, .irq = 0}, 112 {.port = 0x240, .irq = 0}, 113 {.port = 0x260, .irq = 0}, 114 {.port = 0x280, .irq = 0}, 115 {.port = 0x2A0, .irq = 0}, 116 {.port = 0x2C0, .irq = 0}, 117 {.port = 0x2E0, .irq = 0}, 118 {.port = 0x300, .irq = 0}, 119 {.port = 0x320, .irq = 0}, 120 {.port = 0x340, .irq = 0}, 121 {.port = 0x360, .irq = 0}, 122 {.port = 0x380, .irq = 0}, 123 {.port = 0x3A0, .irq = 0}, 124 {.port = 0x3C0, .irq = 0}, 125 {.port = 0x3E0, .irq = 0}, 126 {.port = 0, .irq = 0}, 127 }; 128 /* 129 . Wait time for memory to be free. This probably shouldn't be 130 . tuned that much, as waiting for this means nothing else happens 131 . in the system 132 */ 133 #define MEMORY_WAIT_TIME 16 134 135 /* 136 . DEBUGGING LEVELS 137 . 138 . 0 for normal operation 139 . 1 for slightly more details 140 . >2 for various levels of increasingly useless information 141 . 2 for interrupt tracking, status flags 142 . 3 for packet dumps, etc. 143 */ 144 #define SMC_DEBUG 0 145 146 #if (SMC_DEBUG > 2 ) 147 #define PRINTK3(x) printk x 148 #else 149 #define PRINTK3(x) 150 #endif 151 152 #if SMC_DEBUG > 1 153 #define PRINTK2(x) printk x 154 #else 155 #define PRINTK2(x) 156 #endif 157 158 #ifdef SMC_DEBUG 159 #define PRINTK(x) printk x 160 #else 161 #define PRINTK(x) 162 #endif 163 164 165 /*------------------------------------------------------------------------ 166 . 167 . The internal workings of the driver. If you are changing anything 168 . here with the SMC stuff, you should have the datasheet and known 169 . what you are doing. 170 . 171 -------------------------------------------------------------------------*/ 172 #define CARDNAME "SMC9194" 173 174 175 /* store this information for the driver.. */ 176 struct smc_local { 177 /* 178 If I have to wait until memory is available to send 179 a packet, I will store the skbuff here, until I get the 180 desired memory. Then, I'll send it out and free it. 181 */ 182 struct sk_buff * saved_skb; 183 184 /* 185 . This keeps track of how many packets that I have 186 . sent out. When an TX_EMPTY interrupt comes, I know 187 . that all of these have been sent. 188 */ 189 int packets_waiting; 190 }; 191 192 193 /*----------------------------------------------------------------- 194 . 195 . The driver can be entered at any of the following entry points. 196 . 197 .------------------------------------------------------------------ */ 198 199 /* 200 . This is called by register_netdev(). It is responsible for 201 . checking the portlist for the SMC9000 series chipset. If it finds 202 . one, then it will initialize the device, find the hardware information, 203 . and sets up the appropriate device parameters. 204 . NOTE: Interrupts are *OFF* when this procedure is called. 205 . 206 . NB:This shouldn't be static since it is referred to externally. 207 */ 208 struct net_device *smc_init(int unit); 209 210 /* 211 . The kernel calls this function when someone wants to use the device, 212 . typically 'ifconfig ethX up'. 213 */ 214 static int smc_open(struct net_device *dev); 215 216 /* 217 . Our watchdog timed out. Called by the networking layer 218 */ 219 static void smc_timeout(struct net_device *dev, unsigned int txqueue); 220 221 /* 222 . This is called by the kernel in response to 'ifconfig ethX down'. It 223 . is responsible for cleaning up everything that the open routine 224 . does, and maybe putting the card into a powerdown state. 225 */ 226 static int smc_close(struct net_device *dev); 227 228 /* 229 . Finally, a call to set promiscuous mode ( for TCPDUMP and related 230 . programs ) and multicast modes. 231 */ 232 static void smc_set_multicast_list(struct net_device *dev); 233 234 235 /*--------------------------------------------------------------- 236 . 237 . Interrupt level calls.. 238 . 239 ----------------------------------------------------------------*/ 240 241 /* 242 . Handles the actual interrupt 243 */ 244 static irqreturn_t smc_interrupt(int irq, void *); 245 /* 246 . This is a separate procedure to handle the receipt of a packet, to 247 . leave the interrupt code looking slightly cleaner 248 */ 249 static inline void smc_rcv( struct net_device *dev ); 250 /* 251 . This handles a TX interrupt, which is only called when an error 252 . relating to a packet is sent. 253 */ 254 static inline void smc_tx( struct net_device * dev ); 255 256 /* 257 ------------------------------------------------------------ 258 . 259 . Internal routines 260 . 261 ------------------------------------------------------------ 262 */ 263 264 /* 265 . Test if a given location contains a chip, trying to cause as 266 . little damage as possible if it's not a SMC chip. 267 */ 268 static int smc_probe(struct net_device *dev, int ioaddr); 269 270 /* 271 . A rather simple routine to print out a packet for debugging purposes. 272 */ 273 #if SMC_DEBUG > 2 274 static void print_packet( byte *, int ); 275 #endif 276 277 #define tx_done(dev) 1 278 279 /* this is called to actually send the packet to the chip */ 280 static void smc_hardware_send_packet( struct net_device * dev ); 281 282 /* Since I am not sure if I will have enough room in the chip's ram 283 . to store the packet, I call this routine, which either sends it 284 . now, or generates an interrupt when the card is ready for the 285 . packet */ 286 static netdev_tx_t smc_wait_to_send_packet( struct sk_buff * skb, 287 struct net_device *dev ); 288 289 /* this does a soft reset on the device */ 290 static void smc_reset( int ioaddr ); 291 292 /* Enable Interrupts, Receive, and Transmit */ 293 static void smc_enable( int ioaddr ); 294 295 /* this puts the device in an inactive state */ 296 static void smc_shutdown( int ioaddr ); 297 298 /* This routine will find the IRQ of the driver if one is not 299 . specified in the input to the device. */ 300 static int smc_findirq( int ioaddr ); 301 302 /* 303 . Function: smc_reset( int ioaddr ) 304 . Purpose: 305 . This sets the SMC91xx chip to its normal state, hopefully from whatever 306 . mess that any other DOS driver has put it in. 307 . 308 . Maybe I should reset more registers to defaults in here? SOFTRESET should 309 . do that for me. 310 . 311 . Method: 312 . 1. send a SOFT RESET 313 . 2. wait for it to finish 314 . 3. enable autorelease mode 315 . 4. reset the memory management unit 316 . 5. clear all interrupts 317 . 318 */ smc_reset(int ioaddr)319 static void smc_reset( int ioaddr ) 320 { 321 /* This resets the registers mostly to defaults, but doesn't 322 affect EEPROM. That seems unnecessary */ 323 SMC_SELECT_BANK( 0 ); 324 outw( RCR_SOFTRESET, ioaddr + RCR ); 325 326 /* this should pause enough for the chip to be happy */ 327 SMC_DELAY( ); 328 329 /* Set the transmit and receive configuration registers to 330 default values */ 331 outw( RCR_CLEAR, ioaddr + RCR ); 332 outw( TCR_CLEAR, ioaddr + TCR ); 333 334 /* set the control register to automatically 335 release successfully transmitted packets, to make the best 336 use out of our limited memory */ 337 SMC_SELECT_BANK( 1 ); 338 outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL ); 339 340 /* Reset the MMU */ 341 SMC_SELECT_BANK( 2 ); 342 outw( MC_RESET, ioaddr + MMU_CMD ); 343 344 /* Note: It doesn't seem that waiting for the MMU busy is needed here, 345 but this is a place where future chipsets _COULD_ break. Be wary 346 of issuing another MMU command right after this */ 347 348 outb( 0, ioaddr + INT_MASK ); 349 } 350 351 /* 352 . Function: smc_enable 353 . Purpose: let the chip talk to the outside work 354 . Method: 355 . 1. Enable the transmitter 356 . 2. Enable the receiver 357 . 3. Enable interrupts 358 */ smc_enable(int ioaddr)359 static void smc_enable( int ioaddr ) 360 { 361 SMC_SELECT_BANK( 0 ); 362 /* see the header file for options in TCR/RCR NORMAL*/ 363 outw( TCR_NORMAL, ioaddr + TCR ); 364 outw( RCR_NORMAL, ioaddr + RCR ); 365 366 /* now, enable interrupts */ 367 SMC_SELECT_BANK( 2 ); 368 outb( SMC_INTERRUPT_MASK, ioaddr + INT_MASK ); 369 } 370 371 /* 372 . Function: smc_shutdown 373 . Purpose: closes down the SMC91xxx chip. 374 . Method: 375 . 1. zero the interrupt mask 376 . 2. clear the enable receive flag 377 . 3. clear the enable xmit flags 378 . 379 . TODO: 380 . (1) maybe utilize power down mode. 381 . Why not yet? Because while the chip will go into power down mode, 382 . the manual says that it will wake up in response to any I/O requests 383 . in the register space. Empirical results do not show this working. 384 */ smc_shutdown(int ioaddr)385 static void smc_shutdown( int ioaddr ) 386 { 387 /* no more interrupts for me */ 388 SMC_SELECT_BANK( 2 ); 389 outb( 0, ioaddr + INT_MASK ); 390 391 /* and tell the card to stay away from that nasty outside world */ 392 SMC_SELECT_BANK( 0 ); 393 outb( RCR_CLEAR, ioaddr + RCR ); 394 outb( TCR_CLEAR, ioaddr + TCR ); 395 #if 0 396 /* finally, shut the chip down */ 397 SMC_SELECT_BANK( 1 ); 398 outw( inw( ioaddr + CONTROL ), CTL_POWERDOWN, ioaddr + CONTROL ); 399 #endif 400 } 401 402 403 /* 404 . Function: smc_setmulticast( int ioaddr, struct net_device *dev ) 405 . Purpose: 406 . This sets the internal hardware table to filter out unwanted multicast 407 . packets before they take up memory. 408 . 409 . The SMC chip uses a hash table where the high 6 bits of the CRC of 410 . address are the offset into the table. If that bit is 1, then the 411 . multicast packet is accepted. Otherwise, it's dropped silently. 412 . 413 . To use the 6 bits as an offset into the table, the high 3 bits are the 414 . number of the 8 bit register, while the low 3 bits are the bit within 415 . that register. 416 . 417 . This routine is based very heavily on the one provided by Peter Cammaert. 418 */ 419 420 smc_setmulticast(int ioaddr,struct net_device * dev)421 static void smc_setmulticast(int ioaddr, struct net_device *dev) 422 { 423 int i; 424 unsigned char multicast_table[ 8 ]; 425 struct netdev_hw_addr *ha; 426 /* table for flipping the order of 3 bits */ 427 unsigned char invert3[] = { 0, 4, 2, 6, 1, 5, 3, 7 }; 428 429 /* start with a table of all zeros: reject all */ 430 memset( multicast_table, 0, sizeof( multicast_table ) ); 431 432 netdev_for_each_mc_addr(ha, dev) { 433 int position; 434 435 /* only use the low order bits */ 436 position = ether_crc_le(6, ha->addr) & 0x3f; 437 438 /* do some messy swapping to put the bit in the right spot */ 439 multicast_table[invert3[position&7]] |= 440 (1<<invert3[(position>>3)&7]); 441 442 } 443 /* now, the table can be loaded into the chipset */ 444 SMC_SELECT_BANK( 3 ); 445 446 for ( i = 0; i < 8 ; i++ ) { 447 outb( multicast_table[i], ioaddr + MULTICAST1 + i ); 448 } 449 } 450 451 /* 452 . Function: smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * ) 453 . Purpose: 454 . Attempt to allocate memory for a packet, if chip-memory is not 455 . available, then tell the card to generate an interrupt when it 456 . is available. 457 . 458 . Algorithm: 459 . 460 . o if the saved_skb is not currently null, then drop this packet 461 . on the floor. This should never happen, because of TBUSY. 462 . o if the saved_skb is null, then replace it with the current packet, 463 . o See if I can sending it now. 464 . o (NO): Enable interrupts and let the interrupt handler deal with it. 465 . o (YES):Send it now. 466 */ smc_wait_to_send_packet(struct sk_buff * skb,struct net_device * dev)467 static netdev_tx_t smc_wait_to_send_packet(struct sk_buff *skb, 468 struct net_device *dev) 469 { 470 struct smc_local *lp = netdev_priv(dev); 471 unsigned int ioaddr = dev->base_addr; 472 word length; 473 unsigned short numPages; 474 word time_out; 475 476 netif_stop_queue(dev); 477 /* Well, I want to send the packet.. but I don't know 478 if I can send it right now... */ 479 480 if ( lp->saved_skb) { 481 /* THIS SHOULD NEVER HAPPEN. */ 482 dev->stats.tx_aborted_errors++; 483 printk(CARDNAME": Bad Craziness - sent packet while busy.\n" ); 484 return NETDEV_TX_BUSY; 485 } 486 lp->saved_skb = skb; 487 488 length = skb->len; 489 490 if (length < ETH_ZLEN) { 491 if (skb_padto(skb, ETH_ZLEN)) { 492 netif_wake_queue(dev); 493 return NETDEV_TX_OK; 494 } 495 length = ETH_ZLEN; 496 } 497 498 /* 499 ** The MMU wants the number of pages to be the number of 256 bytes 500 ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) ) 501 ** 502 ** Pkt size for allocating is data length +6 (for additional status words, 503 ** length and ctl!) If odd size last byte is included in this header. 504 */ 505 numPages = ((length & 0xfffe) + 6) / 256; 506 507 if (numPages > 7 ) { 508 printk(CARDNAME": Far too big packet error.\n"); 509 /* freeing the packet is a good thing here... but should 510 . any packets of this size get down here? */ 511 dev_kfree_skb (skb); 512 lp->saved_skb = NULL; 513 /* this IS an error, but, i don't want the skb saved */ 514 netif_wake_queue(dev); 515 return NETDEV_TX_OK; 516 } 517 /* either way, a packet is waiting now */ 518 lp->packets_waiting++; 519 520 /* now, try to allocate the memory */ 521 SMC_SELECT_BANK( 2 ); 522 outw( MC_ALLOC | numPages, ioaddr + MMU_CMD ); 523 /* 524 . Performance Hack 525 . 526 . wait a short amount of time.. if I can send a packet now, I send 527 . it now. Otherwise, I enable an interrupt and wait for one to be 528 . available. 529 . 530 . I could have handled this a slightly different way, by checking to 531 . see if any memory was available in the FREE MEMORY register. However, 532 . either way, I need to generate an allocation, and the allocation works 533 . no matter what, so I saw no point in checking free memory. 534 */ 535 time_out = MEMORY_WAIT_TIME; 536 do { 537 word status; 538 539 status = inb( ioaddr + INTERRUPT ); 540 if ( status & IM_ALLOC_INT ) { 541 /* acknowledge the interrupt */ 542 outb( IM_ALLOC_INT, ioaddr + INTERRUPT ); 543 break; 544 } 545 } while ( -- time_out ); 546 547 if ( !time_out ) { 548 /* oh well, wait until the chip finds memory later */ 549 SMC_ENABLE_INT( IM_ALLOC_INT ); 550 PRINTK2((CARDNAME": memory allocation deferred.\n")); 551 /* it's deferred, but I'll handle it later */ 552 return NETDEV_TX_OK; 553 } 554 /* or YES! I can send the packet now.. */ 555 smc_hardware_send_packet(dev); 556 netif_wake_queue(dev); 557 return NETDEV_TX_OK; 558 } 559 560 /* 561 . Function: smc_hardware_send_packet(struct net_device * ) 562 . Purpose: 563 . This sends the actual packet to the SMC9xxx chip. 564 . 565 . Algorithm: 566 . First, see if a saved_skb is available. 567 . ( this should NOT be called if there is no 'saved_skb' 568 . Now, find the packet number that the chip allocated 569 . Point the data pointers at it in memory 570 . Set the length word in the chip's memory 571 . Dump the packet to chip memory 572 . Check if a last byte is needed ( odd length packet ) 573 . if so, set the control flag right 574 . Tell the card to send it 575 . Enable the transmit interrupt, so I know if it failed 576 . Free the kernel data if I actually sent it. 577 */ smc_hardware_send_packet(struct net_device * dev)578 static void smc_hardware_send_packet( struct net_device * dev ) 579 { 580 struct smc_local *lp = netdev_priv(dev); 581 byte packet_no; 582 struct sk_buff * skb = lp->saved_skb; 583 word length; 584 unsigned int ioaddr; 585 byte * buf; 586 587 ioaddr = dev->base_addr; 588 589 if ( !skb ) { 590 PRINTK((CARDNAME": In XMIT with no packet to send\n")); 591 return; 592 } 593 length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN; 594 buf = skb->data; 595 596 /* If I get here, I _know_ there is a packet slot waiting for me */ 597 packet_no = inb( ioaddr + PNR_ARR + 1 ); 598 if ( packet_no & 0x80 ) { 599 /* or isn't there? BAD CHIP! */ 600 netdev_dbg(dev, CARDNAME": Memory allocation failed.\n"); 601 dev_kfree_skb_any(skb); 602 lp->saved_skb = NULL; 603 netif_wake_queue(dev); 604 return; 605 } 606 607 /* we have a packet address, so tell the card to use it */ 608 outb( packet_no, ioaddr + PNR_ARR ); 609 610 /* point to the beginning of the packet */ 611 outw( PTR_AUTOINC , ioaddr + POINTER ); 612 613 PRINTK3((CARDNAME": Trying to xmit packet of length %x\n", length)); 614 #if SMC_DEBUG > 2 615 print_packet( buf, length ); 616 #endif 617 618 /* send the packet length ( +6 for status, length and ctl byte ) 619 and the status word ( set to zeros ) */ 620 #ifdef USE_32_BIT 621 outl( (length +6 ) << 16 , ioaddr + DATA_1 ); 622 #else 623 outw( 0, ioaddr + DATA_1 ); 624 /* send the packet length ( +6 for status words, length, and ctl*/ 625 outb( (length+6) & 0xFF,ioaddr + DATA_1 ); 626 outb( (length+6) >> 8 , ioaddr + DATA_1 ); 627 #endif 628 629 /* send the actual data 630 . I _think_ it's faster to send the longs first, and then 631 . mop up by sending the last word. It depends heavily 632 . on alignment, at least on the 486. Maybe it would be 633 . a good idea to check which is optimal? But that could take 634 . almost as much time as is saved? 635 */ 636 #ifdef USE_32_BIT 637 if ( length & 0x2 ) { 638 outsl(ioaddr + DATA_1, buf, length >> 2 ); 639 outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1); 640 } 641 else 642 outsl(ioaddr + DATA_1, buf, length >> 2 ); 643 #else 644 outsw(ioaddr + DATA_1 , buf, (length ) >> 1); 645 #endif 646 /* Send the last byte, if there is one. */ 647 648 if ( (length & 1) == 0 ) { 649 outw( 0, ioaddr + DATA_1 ); 650 } else { 651 outb( buf[length -1 ], ioaddr + DATA_1 ); 652 outb( 0x20, ioaddr + DATA_1); 653 } 654 655 /* enable the interrupts */ 656 SMC_ENABLE_INT( (IM_TX_INT | IM_TX_EMPTY_INT) ); 657 658 /* and let the chipset deal with it */ 659 outw( MC_ENQUEUE , ioaddr + MMU_CMD ); 660 661 PRINTK2((CARDNAME": Sent packet of length %d\n", length)); 662 663 lp->saved_skb = NULL; 664 dev_kfree_skb_any (skb); 665 666 netif_trans_update(dev); 667 668 /* we can send another packet */ 669 netif_wake_queue(dev); 670 } 671 672 /*------------------------------------------------------------------------- 673 | 674 | smc_init(int unit) 675 | Input parameters: 676 | dev->base_addr == 0, try to find all possible locations 677 | dev->base_addr == 1, return failure code 678 | dev->base_addr == 2, always allocate space, and return success 679 | dev->base_addr == <anything else> this is the address to check 680 | 681 | Output: 682 | pointer to net_device or ERR_PTR(error) 683 | 684 --------------------------------------------------------------------------- 685 */ 686 static int io; 687 static int irq; 688 static int ifport; 689 smc_init(int unit)690 struct net_device * __init smc_init(int unit) 691 { 692 struct net_device *dev = alloc_etherdev(sizeof(struct smc_local)); 693 struct devlist *smcdev = smc_devlist; 694 int err = 0; 695 696 if (!dev) 697 return ERR_PTR(-ENODEV); 698 699 if (unit >= 0) { 700 sprintf(dev->name, "eth%d", unit); 701 netdev_boot_setup_check(dev); 702 io = dev->base_addr; 703 irq = dev->irq; 704 } 705 706 if (io > 0x1ff) { /* Check a single specified location. */ 707 err = smc_probe(dev, io); 708 } else if (io != 0) { /* Don't probe at all. */ 709 err = -ENXIO; 710 } else { 711 for (;smcdev->port; smcdev++) { 712 if (smc_probe(dev, smcdev->port) == 0) 713 break; 714 } 715 if (!smcdev->port) 716 err = -ENODEV; 717 } 718 if (err) 719 goto out; 720 err = register_netdev(dev); 721 if (err) 722 goto out1; 723 return dev; 724 out1: 725 free_irq(dev->irq, dev); 726 release_region(dev->base_addr, SMC_IO_EXTENT); 727 out: 728 free_netdev(dev); 729 return ERR_PTR(err); 730 } 731 732 /*---------------------------------------------------------------------- 733 . smc_findirq 734 . 735 . This routine has a simple purpose -- make the SMC chip generate an 736 . interrupt, so an auto-detect routine can detect it, and find the IRQ, 737 ------------------------------------------------------------------------ 738 */ smc_findirq(int ioaddr)739 static int __init smc_findirq(int ioaddr) 740 { 741 #ifndef NO_AUTOPROBE 742 int timeout = 20; 743 unsigned long cookie; 744 745 746 cookie = probe_irq_on(); 747 748 /* 749 * What I try to do here is trigger an ALLOC_INT. This is done 750 * by allocating a small chunk of memory, which will give an interrupt 751 * when done. 752 */ 753 754 755 SMC_SELECT_BANK(2); 756 /* enable ALLOCation interrupts ONLY */ 757 outb( IM_ALLOC_INT, ioaddr + INT_MASK ); 758 759 /* 760 . Allocate 512 bytes of memory. Note that the chip was just 761 . reset so all the memory is available 762 */ 763 outw( MC_ALLOC | 1, ioaddr + MMU_CMD ); 764 765 /* 766 . Wait until positive that the interrupt has been generated 767 */ 768 while ( timeout ) { 769 byte int_status; 770 771 int_status = inb( ioaddr + INTERRUPT ); 772 773 if ( int_status & IM_ALLOC_INT ) 774 break; /* got the interrupt */ 775 timeout--; 776 } 777 /* there is really nothing that I can do here if timeout fails, 778 as probe_irq_off will return a 0 anyway, which is what I 779 want in this case. Plus, the clean up is needed in both 780 cases. */ 781 782 /* DELAY HERE! 783 On a fast machine, the status might change before the interrupt 784 is given to the processor. This means that the interrupt was 785 never detected, and probe_irq_off fails to report anything. 786 This should fix probe_irq_* problems. 787 */ 788 SMC_DELAY(); 789 SMC_DELAY(); 790 791 /* and disable all interrupts again */ 792 outb( 0, ioaddr + INT_MASK ); 793 794 /* and return what I found */ 795 return probe_irq_off(cookie); 796 #else /* NO_AUTOPROBE */ 797 struct devlist *smcdev; 798 for (smcdev = smc_devlist; smcdev->port; smcdev++) { 799 if (smcdev->port == ioaddr) 800 return smcdev->irq; 801 } 802 return 0; 803 #endif 804 } 805 806 static const struct net_device_ops smc_netdev_ops = { 807 .ndo_open = smc_open, 808 .ndo_stop = smc_close, 809 .ndo_start_xmit = smc_wait_to_send_packet, 810 .ndo_tx_timeout = smc_timeout, 811 .ndo_set_rx_mode = smc_set_multicast_list, 812 .ndo_set_mac_address = eth_mac_addr, 813 .ndo_validate_addr = eth_validate_addr, 814 }; 815 816 /*---------------------------------------------------------------------- 817 . Function: smc_probe( int ioaddr ) 818 . 819 . Purpose: 820 . Tests to see if a given ioaddr points to an SMC9xxx chip. 821 . Returns a 0 on success 822 . 823 . Algorithm: 824 . (1) see if the high byte of BANK_SELECT is 0x33 825 . (2) compare the ioaddr with the base register's address 826 . (3) see if I recognize the chip ID in the appropriate register 827 . 828 .--------------------------------------------------------------------- 829 */ 830 831 /*--------------------------------------------------------------- 832 . Here I do typical initialization tasks. 833 . 834 . o Initialize the structure if needed 835 . o print out my vanity message if not done so already 836 . o print out what type of hardware is detected 837 . o print out the ethernet address 838 . o find the IRQ 839 . o set up my private data 840 . o configure the dev structure with my subroutines 841 . o actually GRAB the irq. 842 . o GRAB the region 843 .----------------------------------------------------------------- 844 */ smc_probe(struct net_device * dev,int ioaddr)845 static int __init smc_probe(struct net_device *dev, int ioaddr) 846 { 847 int i, memory, retval; 848 unsigned int bank; 849 850 const char *version_string; 851 const char *if_string; 852 853 /* registers */ 854 word revision_register; 855 word base_address_register; 856 word configuration_register; 857 word memory_info_register; 858 word memory_cfg_register; 859 u8 addr[ETH_ALEN]; 860 861 /* Grab the region so that no one else tries to probe our ioports. */ 862 if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME)) 863 return -EBUSY; 864 865 dev->irq = irq; 866 dev->if_port = ifport; 867 868 /* First, see if the high byte is 0x33 */ 869 bank = inw( ioaddr + BANK_SELECT ); 870 if ( (bank & 0xFF00) != 0x3300 ) { 871 retval = -ENODEV; 872 goto err_out; 873 } 874 /* The above MIGHT indicate a device, but I need to write to further 875 test this. */ 876 outw( 0x0, ioaddr + BANK_SELECT ); 877 bank = inw( ioaddr + BANK_SELECT ); 878 if ( (bank & 0xFF00 ) != 0x3300 ) { 879 retval = -ENODEV; 880 goto err_out; 881 } 882 /* well, we've already written once, so hopefully another time won't 883 hurt. This time, I need to switch the bank register to bank 1, 884 so I can access the base address register */ 885 SMC_SELECT_BANK(1); 886 base_address_register = inw( ioaddr + BASE ); 887 if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) ) { 888 printk(CARDNAME ": IOADDR %x doesn't match configuration (%x). " 889 "Probably not a SMC chip\n", 890 ioaddr, base_address_register >> 3 & 0x3E0 ); 891 /* well, the base address register didn't match. Must not have 892 been a SMC chip after all. */ 893 retval = -ENODEV; 894 goto err_out; 895 } 896 897 /* check if the revision register is something that I recognize. 898 These might need to be added to later, as future revisions 899 could be added. */ 900 SMC_SELECT_BANK(3); 901 revision_register = inw( ioaddr + REVISION ); 902 if ( !chip_ids[ ( revision_register >> 4 ) & 0xF ] ) { 903 /* I don't recognize this chip, so... */ 904 printk(CARDNAME ": IO %x: Unrecognized revision register:" 905 " %x, Contact author.\n", ioaddr, revision_register); 906 907 retval = -ENODEV; 908 goto err_out; 909 } 910 911 /* at this point I'll assume that the chip is an SMC9xxx. 912 It might be prudent to check a listing of MAC addresses 913 against the hardware address, or do some other tests. */ 914 915 pr_info_once("%s\n", version); 916 917 /* fill in some of the fields */ 918 dev->base_addr = ioaddr; 919 920 /* 921 . Get the MAC address ( bank 1, regs 4 - 9 ) 922 */ 923 SMC_SELECT_BANK( 1 ); 924 for ( i = 0; i < 6; i += 2 ) { 925 word address; 926 927 address = inw( ioaddr + ADDR0 + i ); 928 addr[i + 1] = address >> 8; 929 addr[i] = address & 0xFF; 930 } 931 eth_hw_addr_set(dev, addr); 932 933 /* get the memory information */ 934 935 SMC_SELECT_BANK( 0 ); 936 memory_info_register = inw( ioaddr + MIR ); 937 memory_cfg_register = inw( ioaddr + MCR ); 938 memory = ( memory_cfg_register >> 9 ) & 0x7; /* multiplier */ 939 memory *= 256 * ( memory_info_register & 0xFF ); 940 941 /* 942 Now, I want to find out more about the chip. This is sort of 943 redundant, but it's cleaner to have it in both, rather than having 944 one VERY long probe procedure. 945 */ 946 SMC_SELECT_BANK(3); 947 revision_register = inw( ioaddr + REVISION ); 948 version_string = chip_ids[ ( revision_register >> 4 ) & 0xF ]; 949 if ( !version_string ) { 950 /* I shouldn't get here because this call was done before.... */ 951 retval = -ENODEV; 952 goto err_out; 953 } 954 955 /* is it using AUI or 10BaseT ? */ 956 if ( dev->if_port == 0 ) { 957 SMC_SELECT_BANK(1); 958 configuration_register = inw( ioaddr + CONFIG ); 959 if ( configuration_register & CFG_AUI_SELECT ) 960 dev->if_port = 2; 961 else 962 dev->if_port = 1; 963 } 964 if_string = interfaces[ dev->if_port - 1 ]; 965 966 /* now, reset the chip, and put it into a known state */ 967 smc_reset( ioaddr ); 968 969 /* 970 . If dev->irq is 0, then the device has to be banged on to see 971 . what the IRQ is. 972 . 973 . This banging doesn't always detect the IRQ, for unknown reasons. 974 . a workaround is to reset the chip and try again. 975 . 976 . Interestingly, the DOS packet driver *SETS* the IRQ on the card to 977 . be what is requested on the command line. I don't do that, mostly 978 . because the card that I have uses a non-standard method of accessing 979 . the IRQs, and because this _should_ work in most configurations. 980 . 981 . Specifying an IRQ is done with the assumption that the user knows 982 . what (s)he is doing. No checking is done!!!! 983 . 984 */ 985 if ( dev->irq < 2 ) { 986 int trials; 987 988 trials = 3; 989 while ( trials-- ) { 990 dev->irq = smc_findirq( ioaddr ); 991 if ( dev->irq ) 992 break; 993 /* kick the card and try again */ 994 smc_reset( ioaddr ); 995 } 996 } 997 if (dev->irq == 0 ) { 998 printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n"); 999 retval = -ENODEV; 1000 goto err_out; 1001 } 1002 1003 /* now, print out the card info, in a short format.. */ 1004 1005 netdev_info(dev, "%s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ", 1006 version_string, revision_register & 0xF, ioaddr, dev->irq, 1007 if_string, memory); 1008 /* 1009 . Print the Ethernet address 1010 */ 1011 netdev_info(dev, "ADDR: %pM\n", dev->dev_addr); 1012 1013 /* Grab the IRQ */ 1014 retval = request_irq(dev->irq, smc_interrupt, 0, DRV_NAME, dev); 1015 if (retval) { 1016 netdev_warn(dev, "%s: unable to get IRQ %d (irqval=%d).\n", 1017 DRV_NAME, dev->irq, retval); 1018 goto err_out; 1019 } 1020 1021 dev->netdev_ops = &smc_netdev_ops; 1022 dev->watchdog_timeo = HZ/20; 1023 1024 return 0; 1025 1026 err_out: 1027 release_region(ioaddr, SMC_IO_EXTENT); 1028 return retval; 1029 } 1030 1031 #if SMC_DEBUG > 2 print_packet(byte * buf,int length)1032 static void print_packet( byte * buf, int length ) 1033 { 1034 #if 0 1035 print_hex_dump_debug(DRV_NAME, DUMP_PREFIX_OFFSET, 16, 1, 1036 buf, length, true); 1037 #endif 1038 } 1039 #endif 1040 1041 1042 /* 1043 * Open and Initialize the board 1044 * 1045 * Set up everything, reset the card, etc .. 1046 * 1047 */ smc_open(struct net_device * dev)1048 static int smc_open(struct net_device *dev) 1049 { 1050 int ioaddr = dev->base_addr; 1051 1052 int i; /* used to set hw ethernet address */ 1053 1054 /* clear out all the junk that was put here before... */ 1055 memset(netdev_priv(dev), 0, sizeof(struct smc_local)); 1056 1057 /* reset the hardware */ 1058 1059 smc_reset( ioaddr ); 1060 smc_enable( ioaddr ); 1061 1062 /* Select which interface to use */ 1063 1064 SMC_SELECT_BANK( 1 ); 1065 if ( dev->if_port == 1 ) { 1066 outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT, 1067 ioaddr + CONFIG ); 1068 } 1069 else if ( dev->if_port == 2 ) { 1070 outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT, 1071 ioaddr + CONFIG ); 1072 } 1073 1074 /* 1075 According to Becker, I have to set the hardware address 1076 at this point, because the (l)user can set it with an 1077 ioctl. Easily done... 1078 */ 1079 SMC_SELECT_BANK( 1 ); 1080 for ( i = 0; i < 6; i += 2 ) { 1081 word address; 1082 1083 address = dev->dev_addr[ i + 1 ] << 8 ; 1084 address |= dev->dev_addr[ i ]; 1085 outw( address, ioaddr + ADDR0 + i ); 1086 } 1087 1088 netif_start_queue(dev); 1089 return 0; 1090 } 1091 1092 /*-------------------------------------------------------- 1093 . Called by the kernel to send a packet out into the void 1094 . of the net. This routine is largely based on 1095 . skeleton.c, from Becker. 1096 .-------------------------------------------------------- 1097 */ 1098 smc_timeout(struct net_device * dev,unsigned int txqueue)1099 static void smc_timeout(struct net_device *dev, unsigned int txqueue) 1100 { 1101 /* If we get here, some higher level has decided we are broken. 1102 There should really be a "kick me" function call instead. */ 1103 netdev_warn(dev, CARDNAME": transmit timed out, %s?\n", 1104 tx_done(dev) ? "IRQ conflict" : "network cable problem"); 1105 /* "kick" the adaptor */ 1106 smc_reset( dev->base_addr ); 1107 smc_enable( dev->base_addr ); 1108 netif_trans_update(dev); /* prevent tx timeout */ 1109 /* clear anything saved */ 1110 ((struct smc_local *)netdev_priv(dev))->saved_skb = NULL; 1111 netif_wake_queue(dev); 1112 } 1113 1114 /*------------------------------------------------------------- 1115 . 1116 . smc_rcv - receive a packet from the card 1117 . 1118 . There is ( at least ) a packet waiting to be read from 1119 . chip-memory. 1120 . 1121 . o Read the status 1122 . o If an error, record it 1123 . o otherwise, read in the packet 1124 -------------------------------------------------------------- 1125 */ smc_rcv(struct net_device * dev)1126 static void smc_rcv(struct net_device *dev) 1127 { 1128 int ioaddr = dev->base_addr; 1129 int packet_number; 1130 word status; 1131 word packet_length; 1132 1133 /* assume bank 2 */ 1134 1135 packet_number = inw( ioaddr + FIFO_PORTS ); 1136 1137 if ( packet_number & FP_RXEMPTY ) { 1138 /* we got called , but nothing was on the FIFO */ 1139 PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO.\n")); 1140 /* don't need to restore anything */ 1141 return; 1142 } 1143 1144 /* start reading from the start of the packet */ 1145 outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER ); 1146 1147 /* First two words are status and packet_length */ 1148 status = inw( ioaddr + DATA_1 ); 1149 packet_length = inw( ioaddr + DATA_1 ); 1150 1151 packet_length &= 0x07ff; /* mask off top bits */ 1152 1153 PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length )); 1154 /* 1155 . the packet length contains 3 extra words : 1156 . status, length, and an extra word with an odd byte . 1157 */ 1158 packet_length -= 6; 1159 1160 if ( !(status & RS_ERRORS ) ){ 1161 /* do stuff to make a new packet */ 1162 struct sk_buff * skb; 1163 byte * data; 1164 1165 /* read one extra byte */ 1166 if ( status & RS_ODDFRAME ) 1167 packet_length++; 1168 1169 /* set multicast stats */ 1170 if ( status & RS_MULTICAST ) 1171 dev->stats.multicast++; 1172 1173 skb = netdev_alloc_skb(dev, packet_length + 5); 1174 if ( skb == NULL ) { 1175 dev->stats.rx_dropped++; 1176 goto done; 1177 } 1178 1179 /* 1180 ! This should work without alignment, but it could be 1181 ! in the worse case 1182 */ 1183 1184 skb_reserve( skb, 2 ); /* 16 bit alignment */ 1185 1186 data = skb_put( skb, packet_length); 1187 1188 #ifdef USE_32_BIT 1189 /* QUESTION: Like in the TX routine, do I want 1190 to send the DWORDs or the bytes first, or some 1191 mixture. A mixture might improve already slow PIO 1192 performance */ 1193 PRINTK3((" Reading %d dwords (and %d bytes)\n", 1194 packet_length >> 2, packet_length & 3 )); 1195 insl(ioaddr + DATA_1 , data, packet_length >> 2 ); 1196 /* read the left over bytes */ 1197 insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC), 1198 packet_length & 0x3 ); 1199 #else 1200 PRINTK3((" Reading %d words and %d byte(s)\n", 1201 (packet_length >> 1 ), packet_length & 1 )); 1202 insw(ioaddr + DATA_1 , data, packet_length >> 1); 1203 if ( packet_length & 1 ) { 1204 data += packet_length & ~1; 1205 *(data++) = inb( ioaddr + DATA_1 ); 1206 } 1207 #endif 1208 #if SMC_DEBUG > 2 1209 print_packet( data, packet_length ); 1210 #endif 1211 1212 skb->protocol = eth_type_trans(skb, dev ); 1213 netif_rx(skb); 1214 dev->stats.rx_packets++; 1215 dev->stats.rx_bytes += packet_length; 1216 } else { 1217 /* error ... */ 1218 dev->stats.rx_errors++; 1219 1220 if ( status & RS_ALGNERR ) dev->stats.rx_frame_errors++; 1221 if ( status & (RS_TOOSHORT | RS_TOOLONG ) ) 1222 dev->stats.rx_length_errors++; 1223 if ( status & RS_BADCRC) dev->stats.rx_crc_errors++; 1224 } 1225 1226 done: 1227 /* error or good, tell the card to get rid of this packet */ 1228 outw( MC_RELEASE, ioaddr + MMU_CMD ); 1229 } 1230 1231 1232 /************************************************************************* 1233 . smc_tx 1234 . 1235 . Purpose: Handle a transmit error message. This will only be called 1236 . when an error, because of the AUTO_RELEASE mode. 1237 . 1238 . Algorithm: 1239 . Save pointer and packet no 1240 . Get the packet no from the top of the queue 1241 . check if it's valid ( if not, is this an error??? ) 1242 . read the status word 1243 . record the error 1244 . ( resend? Not really, since we don't want old packets around ) 1245 . Restore saved values 1246 ************************************************************************/ smc_tx(struct net_device * dev)1247 static void smc_tx( struct net_device * dev ) 1248 { 1249 int ioaddr = dev->base_addr; 1250 struct smc_local *lp = netdev_priv(dev); 1251 byte saved_packet; 1252 byte packet_no; 1253 word tx_status; 1254 1255 1256 /* assume bank 2 */ 1257 1258 saved_packet = inb( ioaddr + PNR_ARR ); 1259 packet_no = inw( ioaddr + FIFO_PORTS ); 1260 packet_no &= 0x7F; 1261 1262 /* select this as the packet to read from */ 1263 outb( packet_no, ioaddr + PNR_ARR ); 1264 1265 /* read the first word from this packet */ 1266 outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER ); 1267 1268 tx_status = inw( ioaddr + DATA_1 ); 1269 PRINTK3((CARDNAME": TX DONE STATUS: %4x\n", tx_status)); 1270 1271 dev->stats.tx_errors++; 1272 if ( tx_status & TS_LOSTCAR ) dev->stats.tx_carrier_errors++; 1273 if ( tx_status & TS_LATCOL ) { 1274 netdev_dbg(dev, CARDNAME": Late collision occurred on last xmit.\n"); 1275 dev->stats.tx_window_errors++; 1276 } 1277 #if 0 1278 if ( tx_status & TS_16COL ) { ... } 1279 #endif 1280 1281 if ( tx_status & TS_SUCCESS ) { 1282 netdev_info(dev, CARDNAME": Successful packet caused interrupt\n"); 1283 } 1284 /* re-enable transmit */ 1285 SMC_SELECT_BANK( 0 ); 1286 outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR ); 1287 1288 /* kill the packet */ 1289 SMC_SELECT_BANK( 2 ); 1290 outw( MC_FREEPKT, ioaddr + MMU_CMD ); 1291 1292 /* one less packet waiting for me */ 1293 lp->packets_waiting--; 1294 1295 outb( saved_packet, ioaddr + PNR_ARR ); 1296 } 1297 1298 /*-------------------------------------------------------------------- 1299 . 1300 . This is the main routine of the driver, to handle the device when 1301 . it needs some attention. 1302 . 1303 . So: 1304 . first, save state of the chipset 1305 . branch off into routines to handle each case, and acknowledge 1306 . each to the interrupt register 1307 . and finally restore state. 1308 . 1309 ---------------------------------------------------------------------*/ 1310 smc_interrupt(int irq,void * dev_id)1311 static irqreturn_t smc_interrupt(int irq, void * dev_id) 1312 { 1313 struct net_device *dev = dev_id; 1314 int ioaddr = dev->base_addr; 1315 struct smc_local *lp = netdev_priv(dev); 1316 1317 byte status; 1318 word card_stats; 1319 byte mask; 1320 int timeout; 1321 /* state registers */ 1322 word saved_bank; 1323 word saved_pointer; 1324 int handled = 0; 1325 1326 1327 PRINTK3((CARDNAME": SMC interrupt started\n")); 1328 1329 saved_bank = inw( ioaddr + BANK_SELECT ); 1330 1331 SMC_SELECT_BANK(2); 1332 saved_pointer = inw( ioaddr + POINTER ); 1333 1334 mask = inb( ioaddr + INT_MASK ); 1335 /* clear all interrupts */ 1336 outb( 0, ioaddr + INT_MASK ); 1337 1338 1339 /* set a timeout value, so I don't stay here forever */ 1340 timeout = 4; 1341 1342 PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x\n", mask)); 1343 do { 1344 /* read the status flag, and mask it */ 1345 status = inb( ioaddr + INTERRUPT ) & mask; 1346 if (!status ) 1347 break; 1348 1349 handled = 1; 1350 1351 PRINTK3((KERN_WARNING CARDNAME 1352 ": Handling interrupt status %x\n", status)); 1353 1354 if (status & IM_RCV_INT) { 1355 /* Got a packet(s). */ 1356 PRINTK2((KERN_WARNING CARDNAME 1357 ": Receive Interrupt\n")); 1358 smc_rcv(dev); 1359 } else if (status & IM_TX_INT ) { 1360 PRINTK2((KERN_WARNING CARDNAME 1361 ": TX ERROR handled\n")); 1362 smc_tx(dev); 1363 outb(IM_TX_INT, ioaddr + INTERRUPT ); 1364 } else if (status & IM_TX_EMPTY_INT ) { 1365 /* update stats */ 1366 SMC_SELECT_BANK( 0 ); 1367 card_stats = inw( ioaddr + COUNTER ); 1368 /* single collisions */ 1369 dev->stats.collisions += card_stats & 0xF; 1370 card_stats >>= 4; 1371 /* multiple collisions */ 1372 dev->stats.collisions += card_stats & 0xF; 1373 1374 /* these are for when linux supports these statistics */ 1375 1376 SMC_SELECT_BANK( 2 ); 1377 PRINTK2((KERN_WARNING CARDNAME 1378 ": TX_BUFFER_EMPTY handled\n")); 1379 outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT ); 1380 mask &= ~IM_TX_EMPTY_INT; 1381 dev->stats.tx_packets += lp->packets_waiting; 1382 lp->packets_waiting = 0; 1383 1384 } else if (status & IM_ALLOC_INT ) { 1385 PRINTK2((KERN_DEBUG CARDNAME 1386 ": Allocation interrupt\n")); 1387 /* clear this interrupt so it doesn't happen again */ 1388 mask &= ~IM_ALLOC_INT; 1389 1390 smc_hardware_send_packet( dev ); 1391 1392 /* enable xmit interrupts based on this */ 1393 mask |= ( IM_TX_EMPTY_INT | IM_TX_INT ); 1394 1395 /* and let the card send more packets to me */ 1396 netif_wake_queue(dev); 1397 1398 PRINTK2((CARDNAME": Handoff done successfully.\n")); 1399 } else if (status & IM_RX_OVRN_INT ) { 1400 dev->stats.rx_errors++; 1401 dev->stats.rx_fifo_errors++; 1402 outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT ); 1403 } else if (status & IM_EPH_INT ) { 1404 PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT\n")); 1405 } else if (status & IM_ERCV_INT ) { 1406 PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT\n")); 1407 outb( IM_ERCV_INT, ioaddr + INTERRUPT ); 1408 } 1409 } while ( timeout -- ); 1410 1411 1412 /* restore state register */ 1413 SMC_SELECT_BANK( 2 ); 1414 outb( mask, ioaddr + INT_MASK ); 1415 1416 PRINTK3((KERN_WARNING CARDNAME ": MASK is now %x\n", mask)); 1417 outw( saved_pointer, ioaddr + POINTER ); 1418 1419 SMC_SELECT_BANK( saved_bank ); 1420 1421 PRINTK3((CARDNAME ": Interrupt done\n")); 1422 return IRQ_RETVAL(handled); 1423 } 1424 1425 1426 /*---------------------------------------------------- 1427 . smc_close 1428 . 1429 . this makes the board clean up everything that it can 1430 . and not talk to the outside world. Caused by 1431 . an 'ifconfig ethX down' 1432 . 1433 -----------------------------------------------------*/ smc_close(struct net_device * dev)1434 static int smc_close(struct net_device *dev) 1435 { 1436 netif_stop_queue(dev); 1437 /* clear everything */ 1438 smc_shutdown( dev->base_addr ); 1439 1440 /* Update the statistics here. */ 1441 return 0; 1442 } 1443 1444 /*----------------------------------------------------------- 1445 . smc_set_multicast_list 1446 . 1447 . This routine will, depending on the values passed to it, 1448 . either make it accept multicast packets, go into 1449 . promiscuous mode ( for TCPDUMP and cousins ) or accept 1450 . a select set of multicast packets 1451 */ smc_set_multicast_list(struct net_device * dev)1452 static void smc_set_multicast_list(struct net_device *dev) 1453 { 1454 short ioaddr = dev->base_addr; 1455 1456 SMC_SELECT_BANK(0); 1457 if ( dev->flags & IFF_PROMISC ) 1458 outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR ); 1459 1460 /* BUG? I never disable promiscuous mode if multicasting was turned on. 1461 Now, I turn off promiscuous mode, but I don't do anything to multicasting 1462 when promiscuous mode is turned on. 1463 */ 1464 1465 /* Here, I am setting this to accept all multicast packets. 1466 I don't need to zero the multicast table, because the flag is 1467 checked before the table is 1468 */ 1469 else if (dev->flags & IFF_ALLMULTI) 1470 outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR ); 1471 1472 /* We just get all multicast packets even if we only want them 1473 . from one source. This will be changed at some future 1474 . point. */ 1475 else if (!netdev_mc_empty(dev)) { 1476 /* support hardware multicasting */ 1477 1478 /* be sure I get rid of flags I might have set */ 1479 outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL), 1480 ioaddr + RCR ); 1481 /* NOTE: this has to set the bank, so make sure it is the 1482 last thing called. The bank is set to zero at the top */ 1483 smc_setmulticast(ioaddr, dev); 1484 } 1485 else { 1486 outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL), 1487 ioaddr + RCR ); 1488 1489 /* 1490 since I'm disabling all multicast entirely, I need to 1491 clear the multicast list 1492 */ 1493 SMC_SELECT_BANK( 3 ); 1494 outw( 0, ioaddr + MULTICAST1 ); 1495 outw( 0, ioaddr + MULTICAST2 ); 1496 outw( 0, ioaddr + MULTICAST3 ); 1497 outw( 0, ioaddr + MULTICAST4 ); 1498 } 1499 } 1500 1501 #ifdef MODULE 1502 1503 static struct net_device *devSMC9194; 1504 MODULE_LICENSE("GPL"); 1505 1506 module_param_hw(io, int, ioport, 0); 1507 module_param_hw(irq, int, irq, 0); 1508 module_param(ifport, int, 0); 1509 MODULE_PARM_DESC(io, "SMC 99194 I/O base address"); 1510 MODULE_PARM_DESC(irq, "SMC 99194 IRQ number"); 1511 MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)"); 1512 smc_init_module(void)1513 static int __init smc_init_module(void) 1514 { 1515 if (io == 0) 1516 printk(KERN_WARNING 1517 CARDNAME": You shouldn't use auto-probing with insmod!\n" ); 1518 1519 /* copy the parameters from insmod into the device structure */ 1520 devSMC9194 = smc_init(-1); 1521 return PTR_ERR_OR_ZERO(devSMC9194); 1522 } 1523 module_init(smc_init_module); 1524 smc_cleanup_module(void)1525 static void __exit smc_cleanup_module(void) 1526 { 1527 unregister_netdev(devSMC9194); 1528 free_irq(devSMC9194->irq, devSMC9194); 1529 release_region(devSMC9194->base_addr, SMC_IO_EXTENT); 1530 free_netdev(devSMC9194); 1531 } 1532 module_exit(smc_cleanup_module); 1533 1534 #endif /* MODULE */ 1535