1 /* atarilance.c: Ethernet driver for VME Lance cards on the Atari */ 2 /* 3 Written 1995/96 by Roman Hodek (Roman.Hodek@informatik.uni-erlangen.de) 4 5 This software may be used and distributed according to the terms 6 of the GNU General Public License, incorporated herein by reference. 7 8 This drivers was written with the following sources of reference: 9 - The driver for the Riebl Lance card by the TU Vienna. 10 - The modified TUW driver for PAM's VME cards 11 - The PC-Linux driver for Lance cards (but this is for bus master 12 cards, not the shared memory ones) 13 - The Amiga Ariadne driver 14 15 v1.0: (in 1.2.13pl4/0.9.13) 16 Initial version 17 v1.1: (in 1.2.13pl5) 18 more comments 19 deleted some debugging stuff 20 optimized register access (keep AREG pointing to CSR0) 21 following AMD, CSR0_STRT should be set only after IDON is detected 22 use memcpy() for data transfers, that also employs long word moves 23 better probe procedure for 24-bit systems 24 non-VME-RieblCards need extra delays in memcpy 25 must also do write test, since 0xfxe00000 may hit ROM 26 use 8/32 tx/rx buffers, which should give better NFS performance; 27 this is made possible by shifting the last packet buffer after the 28 RieblCard reserved area 29 v1.2: (in 1.2.13pl8) 30 again fixed probing for the Falcon; 0xfe01000 hits phys. 0x00010000 31 and thus RAM, in case of no Lance found all memory contents have to 32 be restored! 33 Now possible to compile as module. 34 v1.3: 03/30/96 Jes Sorensen, Roman (in 1.3) 35 Several little 1.3 adaptions 36 When the lance is stopped it jumps back into little-endian 37 mode. It is therefore necessary to put it back where it 38 belongs, in big endian mode, in order to make things work. 39 This might be the reason why multicast-mode didn't work 40 before, but I'm not able to test it as I only got an Amiga 41 (we had similar problems with the A2065 driver). 42 43 */ 44 45 static const char version[] = "atarilance.c: v1.3 04/04/96 " 46 "Roman.Hodek@informatik.uni-erlangen.de\n"; 47 48 #include <linux/netdevice.h> 49 #include <linux/etherdevice.h> 50 #include <linux/module.h> 51 #include <linux/stddef.h> 52 #include <linux/kernel.h> 53 #include <linux/string.h> 54 #include <linux/errno.h> 55 #include <linux/skbuff.h> 56 #include <linux/interrupt.h> 57 #include <linux/init.h> 58 #include <linux/bitops.h> 59 60 #include <asm/setup.h> 61 #include <asm/irq.h> 62 #include <asm/atarihw.h> 63 #include <asm/atariints.h> 64 #include <asm/io.h> 65 66 /* Debug level: 67 * 0 = silent, print only serious errors 68 * 1 = normal, print error messages 69 * 2 = debug, print debug infos 70 * 3 = debug, print even more debug infos (packet data) 71 */ 72 73 #define LANCE_DEBUG 1 74 75 #ifdef LANCE_DEBUG 76 static int lance_debug = LANCE_DEBUG; 77 #else 78 static int lance_debug = 1; 79 #endif 80 module_param(lance_debug, int, 0); 81 MODULE_PARM_DESC(lance_debug, "atarilance debug level (0-3)"); 82 MODULE_LICENSE("GPL"); 83 84 /* Print debug messages on probing? */ 85 #undef LANCE_DEBUG_PROBE 86 87 #define DPRINTK(n,a) \ 88 do { \ 89 if (lance_debug >= n) \ 90 printk a; \ 91 } while( 0 ) 92 93 #ifdef LANCE_DEBUG_PROBE 94 # define PROBE_PRINT(a) printk a 95 #else 96 # define PROBE_PRINT(a) 97 #endif 98 99 /* These define the number of Rx and Tx buffers as log2. (Only powers 100 * of two are valid) 101 * Much more rx buffers (32) are reserved than tx buffers (8), since receiving 102 * is more time critical then sending and packets may have to remain in the 103 * board's memory when main memory is low. 104 */ 105 106 #define TX_LOG_RING_SIZE 3 107 #define RX_LOG_RING_SIZE 5 108 109 /* These are the derived values */ 110 111 #define TX_RING_SIZE (1 << TX_LOG_RING_SIZE) 112 #define TX_RING_LEN_BITS (TX_LOG_RING_SIZE << 5) 113 #define TX_RING_MOD_MASK (TX_RING_SIZE - 1) 114 115 #define RX_RING_SIZE (1 << RX_LOG_RING_SIZE) 116 #define RX_RING_LEN_BITS (RX_LOG_RING_SIZE << 5) 117 #define RX_RING_MOD_MASK (RX_RING_SIZE - 1) 118 119 #define TX_TIMEOUT (HZ/5) 120 121 /* The LANCE Rx and Tx ring descriptors. */ 122 struct lance_rx_head { 123 unsigned short base; /* Low word of base addr */ 124 volatile unsigned char flag; 125 unsigned char base_hi; /* High word of base addr (unused) */ 126 short buf_length; /* This length is 2s complement! */ 127 volatile short msg_length; /* This length is "normal". */ 128 }; 129 130 struct lance_tx_head { 131 unsigned short base; /* Low word of base addr */ 132 volatile unsigned char flag; 133 unsigned char base_hi; /* High word of base addr (unused) */ 134 short length; /* Length is 2s complement! */ 135 volatile short misc; 136 }; 137 138 struct ringdesc { 139 unsigned short adr_lo; /* Low 16 bits of address */ 140 unsigned char len; /* Length bits */ 141 unsigned char adr_hi; /* High 8 bits of address (unused) */ 142 }; 143 144 /* The LANCE initialization block, described in databook. */ 145 struct lance_init_block { 146 unsigned short mode; /* Pre-set mode */ 147 unsigned char hwaddr[6]; /* Physical ethernet address */ 148 unsigned filter[2]; /* Multicast filter (unused). */ 149 /* Receive and transmit ring base, along with length bits. */ 150 struct ringdesc rx_ring; 151 struct ringdesc tx_ring; 152 }; 153 154 /* The whole layout of the Lance shared memory */ 155 struct lance_memory { 156 struct lance_init_block init; 157 struct lance_tx_head tx_head[TX_RING_SIZE]; 158 struct lance_rx_head rx_head[RX_RING_SIZE]; 159 char packet_area[]; /* packet data follow after the 160 * init block and the ring 161 * descriptors and are located 162 * at runtime */ 163 }; 164 165 /* RieblCard specifics: 166 * The original TOS driver for these cards reserves the area from offset 167 * 0xee70 to 0xeebb for storing configuration data. Of interest to us is the 168 * Ethernet address there, and the magic for verifying the data's validity. 169 * The reserved area isn't touch by packet buffers. Furthermore, offset 0xfffe 170 * is reserved for the interrupt vector number. 171 */ 172 #define RIEBL_RSVD_START 0xee70 173 #define RIEBL_RSVD_END 0xeec0 174 #define RIEBL_MAGIC 0x09051990 175 #define RIEBL_MAGIC_ADDR ((unsigned long *)(((char *)MEM) + 0xee8a)) 176 #define RIEBL_HWADDR_ADDR ((unsigned char *)(((char *)MEM) + 0xee8e)) 177 #define RIEBL_IVEC_ADDR ((unsigned short *)(((char *)MEM) + 0xfffe)) 178 179 /* This is a default address for the old RieblCards without a battery 180 * that have no ethernet address at boot time. 00:00:36:04 is the 181 * prefix for Riebl cards, the 00:00 at the end is arbitrary. 182 */ 183 184 static unsigned char OldRieblDefHwaddr[6] = { 185 0x00, 0x00, 0x36, 0x04, 0x00, 0x00 186 }; 187 188 189 /* I/O registers of the Lance chip */ 190 191 struct lance_ioreg { 192 /* base+0x0 */ volatile unsigned short data; 193 /* base+0x2 */ volatile unsigned short addr; 194 unsigned char _dummy1[3]; 195 /* base+0x7 */ volatile unsigned char ivec; 196 unsigned char _dummy2[5]; 197 /* base+0xd */ volatile unsigned char eeprom; 198 unsigned char _dummy3; 199 /* base+0xf */ volatile unsigned char mem; 200 }; 201 202 /* Types of boards this driver supports */ 203 204 enum lance_type { 205 OLD_RIEBL, /* old Riebl card without battery */ 206 NEW_RIEBL, /* new Riebl card with battery */ 207 PAM_CARD /* PAM card with EEPROM */ 208 }; 209 210 static char *lance_names[] = { 211 "Riebl-Card (without battery)", 212 "Riebl-Card (with battery)", 213 "PAM intern card" 214 }; 215 216 /* The driver's private device structure */ 217 218 struct lance_private { 219 enum lance_type cardtype; 220 struct lance_ioreg *iobase; 221 struct lance_memory *mem; 222 int cur_rx, cur_tx; /* The next free ring entry */ 223 int dirty_tx; /* Ring entries to be freed. */ 224 /* copy function */ 225 void *(*memcpy_f)( void *, const void *, size_t ); 226 /* This must be long for set_bit() */ 227 long tx_full; 228 spinlock_t devlock; 229 }; 230 231 /* I/O register access macros */ 232 233 #define MEM lp->mem 234 #define DREG IO->data 235 #define AREG IO->addr 236 #define REGA(a) (*( AREG = (a), &DREG )) 237 238 /* Definitions for packet buffer access: */ 239 #define PKT_BUF_SZ 1544 240 /* Get the address of a packet buffer corresponding to a given buffer head */ 241 #define PKTBUF_ADDR(head) (((unsigned char *)(MEM)) + (head)->base) 242 243 /* Possible memory/IO addresses for probing */ 244 245 static struct lance_addr { 246 unsigned long memaddr; 247 unsigned long ioaddr; 248 int slow_flag; 249 } lance_addr_list[] = { 250 { 0xfe010000, 0xfe00fff0, 0 }, /* RieblCard VME in TT */ 251 { 0xffc10000, 0xffc0fff0, 0 }, /* RieblCard VME in MegaSTE 252 (highest byte stripped) */ 253 { 0xffe00000, 0xffff7000, 1 }, /* RieblCard in ST 254 (highest byte stripped) */ 255 { 0xffd00000, 0xffff7000, 1 }, /* RieblCard in ST with hw modif. to 256 avoid conflict with ROM 257 (highest byte stripped) */ 258 { 0xffcf0000, 0xffcffff0, 0 }, /* PAMCard VME in TT and MSTE 259 (highest byte stripped) */ 260 { 0xfecf0000, 0xfecffff0, 0 }, /* Rhotron's PAMCard VME in TT and MSTE 261 (highest byte stripped) */ 262 }; 263 264 #define N_LANCE_ADDR ARRAY_SIZE(lance_addr_list) 265 266 267 /* Definitions for the Lance */ 268 269 /* tx_head flags */ 270 #define TMD1_ENP 0x01 /* end of packet */ 271 #define TMD1_STP 0x02 /* start of packet */ 272 #define TMD1_DEF 0x04 /* deferred */ 273 #define TMD1_ONE 0x08 /* one retry needed */ 274 #define TMD1_MORE 0x10 /* more than one retry needed */ 275 #define TMD1_ERR 0x40 /* error summary */ 276 #define TMD1_OWN 0x80 /* ownership (set: chip owns) */ 277 278 #define TMD1_OWN_CHIP TMD1_OWN 279 #define TMD1_OWN_HOST 0 280 281 /* tx_head misc field */ 282 #define TMD3_TDR 0x03FF /* Time Domain Reflectometry counter */ 283 #define TMD3_RTRY 0x0400 /* failed after 16 retries */ 284 #define TMD3_LCAR 0x0800 /* carrier lost */ 285 #define TMD3_LCOL 0x1000 /* late collision */ 286 #define TMD3_UFLO 0x4000 /* underflow (late memory) */ 287 #define TMD3_BUFF 0x8000 /* buffering error (no ENP) */ 288 289 /* rx_head flags */ 290 #define RMD1_ENP 0x01 /* end of packet */ 291 #define RMD1_STP 0x02 /* start of packet */ 292 #define RMD1_BUFF 0x04 /* buffer error */ 293 #define RMD1_CRC 0x08 /* CRC error */ 294 #define RMD1_OFLO 0x10 /* overflow */ 295 #define RMD1_FRAM 0x20 /* framing error */ 296 #define RMD1_ERR 0x40 /* error summary */ 297 #define RMD1_OWN 0x80 /* ownership (set: ship owns) */ 298 299 #define RMD1_OWN_CHIP RMD1_OWN 300 #define RMD1_OWN_HOST 0 301 302 /* register names */ 303 #define CSR0 0 /* mode/status */ 304 #define CSR1 1 /* init block addr (low) */ 305 #define CSR2 2 /* init block addr (high) */ 306 #define CSR3 3 /* misc */ 307 #define CSR8 8 /* address filter */ 308 #define CSR15 15 /* promiscuous mode */ 309 310 /* CSR0 */ 311 /* (R=readable, W=writeable, S=set on write, C=clear on write) */ 312 #define CSR0_INIT 0x0001 /* initialize (RS) */ 313 #define CSR0_STRT 0x0002 /* start (RS) */ 314 #define CSR0_STOP 0x0004 /* stop (RS) */ 315 #define CSR0_TDMD 0x0008 /* transmit demand (RS) */ 316 #define CSR0_TXON 0x0010 /* transmitter on (R) */ 317 #define CSR0_RXON 0x0020 /* receiver on (R) */ 318 #define CSR0_INEA 0x0040 /* interrupt enable (RW) */ 319 #define CSR0_INTR 0x0080 /* interrupt active (R) */ 320 #define CSR0_IDON 0x0100 /* initialization done (RC) */ 321 #define CSR0_TINT 0x0200 /* transmitter interrupt (RC) */ 322 #define CSR0_RINT 0x0400 /* receiver interrupt (RC) */ 323 #define CSR0_MERR 0x0800 /* memory error (RC) */ 324 #define CSR0_MISS 0x1000 /* missed frame (RC) */ 325 #define CSR0_CERR 0x2000 /* carrier error (no heartbeat :-) (RC) */ 326 #define CSR0_BABL 0x4000 /* babble: tx-ed too many bits (RC) */ 327 #define CSR0_ERR 0x8000 /* error (RC) */ 328 329 /* CSR3 */ 330 #define CSR3_BCON 0x0001 /* byte control */ 331 #define CSR3_ACON 0x0002 /* ALE control */ 332 #define CSR3_BSWP 0x0004 /* byte swap (1=big endian) */ 333 334 335 336 /***************************** Prototypes *****************************/ 337 338 static unsigned long lance_probe1( struct net_device *dev, struct lance_addr 339 *init_rec ); 340 static int lance_open( struct net_device *dev ); 341 static void lance_init_ring( struct net_device *dev ); 342 static netdev_tx_t lance_start_xmit(struct sk_buff *skb, 343 struct net_device *dev); 344 static irqreturn_t lance_interrupt( int irq, void *dev_id ); 345 static int lance_rx( struct net_device *dev ); 346 static int lance_close( struct net_device *dev ); 347 static void set_multicast_list( struct net_device *dev ); 348 static int lance_set_mac_address( struct net_device *dev, void *addr ); 349 static void lance_tx_timeout (struct net_device *dev, unsigned int txqueue); 350 351 /************************* End of Prototypes **************************/ 352 353 354 355 356 357 static void *slow_memcpy( void *dst, const void *src, size_t len ) 358 359 { char *cto = dst; 360 const char *cfrom = src; 361 362 while( len-- ) { 363 *cto++ = *cfrom++; 364 MFPDELAY(); 365 } 366 return dst; 367 } 368 369 370 struct net_device * __init atarilance_probe(void) 371 { 372 int i; 373 static int found; 374 struct net_device *dev; 375 int err = -ENODEV; 376 377 if (!MACH_IS_ATARI || found) 378 /* Assume there's only one board possible... That seems true, since 379 * the Riebl/PAM board's address cannot be changed. */ 380 return ERR_PTR(-ENODEV); 381 382 dev = alloc_etherdev(sizeof(struct lance_private)); 383 if (!dev) 384 return ERR_PTR(-ENOMEM); 385 386 for( i = 0; i < N_LANCE_ADDR; ++i ) { 387 if (lance_probe1( dev, &lance_addr_list[i] )) { 388 found = 1; 389 err = register_netdev(dev); 390 if (!err) 391 return dev; 392 free_irq(dev->irq, dev); 393 break; 394 } 395 } 396 free_netdev(dev); 397 return ERR_PTR(err); 398 } 399 400 401 /* Derived from hwreg_present() in atari/config.c: */ 402 403 static noinline int __init addr_accessible(volatile void *regp, int wordflag, 404 int writeflag) 405 { 406 int ret; 407 unsigned long flags; 408 long *vbr, save_berr; 409 410 local_irq_save(flags); 411 412 __asm__ __volatile__ ( "movec %/vbr,%0" : "=r" (vbr) : ); 413 save_berr = vbr[2]; 414 415 __asm__ __volatile__ 416 ( "movel %/sp,%/d1\n\t" 417 "movel #Lberr,%2@\n\t" 418 "moveq #0,%0\n\t" 419 "tstl %3\n\t" 420 "bne 1f\n\t" 421 "moveb %1@,%/d0\n\t" 422 "nop \n\t" 423 "bra 2f\n" 424 "1: movew %1@,%/d0\n\t" 425 "nop \n" 426 "2: tstl %4\n\t" 427 "beq 2f\n\t" 428 "tstl %3\n\t" 429 "bne 1f\n\t" 430 "clrb %1@\n\t" 431 "nop \n\t" 432 "moveb %/d0,%1@\n\t" 433 "nop \n\t" 434 "bra 2f\n" 435 "1: clrw %1@\n\t" 436 "nop \n\t" 437 "movew %/d0,%1@\n\t" 438 "nop \n" 439 "2: moveq #1,%0\n" 440 "Lberr: movel %/d1,%/sp" 441 : "=&d" (ret) 442 : "a" (regp), "a" (&vbr[2]), "rm" (wordflag), "rm" (writeflag) 443 : "d0", "d1", "memory" 444 ); 445 446 vbr[2] = save_berr; 447 local_irq_restore(flags); 448 449 return ret; 450 } 451 452 static const struct net_device_ops lance_netdev_ops = { 453 .ndo_open = lance_open, 454 .ndo_stop = lance_close, 455 .ndo_start_xmit = lance_start_xmit, 456 .ndo_set_rx_mode = set_multicast_list, 457 .ndo_set_mac_address = lance_set_mac_address, 458 .ndo_tx_timeout = lance_tx_timeout, 459 .ndo_validate_addr = eth_validate_addr, 460 }; 461 462 static unsigned long __init lance_probe1( struct net_device *dev, 463 struct lance_addr *init_rec ) 464 { 465 volatile unsigned short *memaddr = 466 (volatile unsigned short *)init_rec->memaddr; 467 volatile unsigned short *ioaddr = 468 (volatile unsigned short *)init_rec->ioaddr; 469 struct lance_private *lp; 470 struct lance_ioreg *IO; 471 int i; 472 static int did_version; 473 unsigned short save1, save2; 474 475 PROBE_PRINT(( "Probing for Lance card at mem %#lx io %#lx\n", 476 (long)memaddr, (long)ioaddr )); 477 478 /* Test whether memory readable and writable */ 479 PROBE_PRINT(( "lance_probe1: testing memory to be accessible\n" )); 480 if (!addr_accessible( memaddr, 1, 1 )) goto probe_fail; 481 482 /* Written values should come back... */ 483 PROBE_PRINT(( "lance_probe1: testing memory to be writable (1)\n" )); 484 save1 = *memaddr; 485 *memaddr = 0x0001; 486 if (*memaddr != 0x0001) goto probe_fail; 487 PROBE_PRINT(( "lance_probe1: testing memory to be writable (2)\n" )); 488 *memaddr = 0x0000; 489 if (*memaddr != 0x0000) goto probe_fail; 490 *memaddr = save1; 491 492 /* First port should be readable and writable */ 493 PROBE_PRINT(( "lance_probe1: testing ioport to be accessible\n" )); 494 if (!addr_accessible( ioaddr, 1, 1 )) goto probe_fail; 495 496 /* and written values should be readable */ 497 PROBE_PRINT(( "lance_probe1: testing ioport to be writeable\n" )); 498 save2 = ioaddr[1]; 499 ioaddr[1] = 0x0001; 500 if (ioaddr[1] != 0x0001) goto probe_fail; 501 502 /* The CSR0_INIT bit should not be readable */ 503 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (1)\n" )); 504 save1 = ioaddr[0]; 505 ioaddr[1] = CSR0; 506 ioaddr[0] = CSR0_INIT | CSR0_STOP; 507 if (ioaddr[0] != CSR0_STOP) { 508 ioaddr[0] = save1; 509 ioaddr[1] = save2; 510 goto probe_fail; 511 } 512 PROBE_PRINT(( "lance_probe1: testing CSR0 register function (2)\n" )); 513 ioaddr[0] = CSR0_STOP; 514 if (ioaddr[0] != CSR0_STOP) { 515 ioaddr[0] = save1; 516 ioaddr[1] = save2; 517 goto probe_fail; 518 } 519 520 /* Now ok... */ 521 PROBE_PRINT(( "lance_probe1: Lance card detected\n" )); 522 goto probe_ok; 523 524 probe_fail: 525 return 0; 526 527 probe_ok: 528 lp = netdev_priv(dev); 529 MEM = (struct lance_memory *)memaddr; 530 IO = lp->iobase = (struct lance_ioreg *)ioaddr; 531 dev->base_addr = (unsigned long)ioaddr; /* informational only */ 532 lp->memcpy_f = init_rec->slow_flag ? slow_memcpy : memcpy; 533 534 REGA( CSR0 ) = CSR0_STOP; 535 536 /* Now test for type: If the eeprom I/O port is readable, it is a 537 * PAM card */ 538 if (addr_accessible( &(IO->eeprom), 0, 0 )) { 539 /* Switch back to Ram */ 540 i = IO->mem; 541 lp->cardtype = PAM_CARD; 542 } 543 else if (*RIEBL_MAGIC_ADDR == RIEBL_MAGIC) { 544 lp->cardtype = NEW_RIEBL; 545 } 546 else 547 lp->cardtype = OLD_RIEBL; 548 549 if (lp->cardtype == PAM_CARD || 550 memaddr == (unsigned short *)0xffe00000) { 551 /* PAMs card and Riebl on ST use level 5 autovector */ 552 if (request_irq(IRQ_AUTO_5, lance_interrupt, 0, 553 "PAM,Riebl-ST Ethernet", dev)) { 554 printk( "Lance: request for irq %d failed\n", IRQ_AUTO_5 ); 555 return 0; 556 } 557 dev->irq = IRQ_AUTO_5; 558 } 559 else { 560 /* For VME-RieblCards, request a free VME int */ 561 unsigned int irq = atari_register_vme_int(); 562 if (!irq) { 563 printk( "Lance: request for VME interrupt failed\n" ); 564 return 0; 565 } 566 if (request_irq(irq, lance_interrupt, 0, "Riebl-VME Ethernet", 567 dev)) { 568 printk( "Lance: request for irq %u failed\n", irq ); 569 return 0; 570 } 571 dev->irq = irq; 572 } 573 574 printk("%s: %s at io %#lx, mem %#lx, irq %d%s, hwaddr ", 575 dev->name, lance_names[lp->cardtype], 576 (unsigned long)ioaddr, 577 (unsigned long)memaddr, 578 dev->irq, 579 init_rec->slow_flag ? " (slow memcpy)" : "" ); 580 581 /* Get the ethernet address */ 582 switch( lp->cardtype ) { 583 case OLD_RIEBL: 584 /* No ethernet address! (Set some default address) */ 585 memcpy(dev->dev_addr, OldRieblDefHwaddr, ETH_ALEN); 586 break; 587 case NEW_RIEBL: 588 lp->memcpy_f(dev->dev_addr, RIEBL_HWADDR_ADDR, ETH_ALEN); 589 break; 590 case PAM_CARD: 591 i = IO->eeprom; 592 for( i = 0; i < 6; ++i ) 593 dev->dev_addr[i] = 594 ((((unsigned short *)MEM)[i*2] & 0x0f) << 4) | 595 ((((unsigned short *)MEM)[i*2+1] & 0x0f)); 596 i = IO->mem; 597 break; 598 } 599 printk("%pM\n", dev->dev_addr); 600 if (lp->cardtype == OLD_RIEBL) { 601 printk( "%s: Warning: This is a default ethernet address!\n", 602 dev->name ); 603 printk( " Use \"ifconfig hw ether ...\" to set the address.\n" ); 604 } 605 606 spin_lock_init(&lp->devlock); 607 608 MEM->init.mode = 0x0000; /* Disable Rx and Tx. */ 609 for( i = 0; i < 6; i++ ) 610 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */ 611 MEM->init.filter[0] = 0x00000000; 612 MEM->init.filter[1] = 0x00000000; 613 MEM->init.rx_ring.adr_lo = offsetof( struct lance_memory, rx_head ); 614 MEM->init.rx_ring.adr_hi = 0; 615 MEM->init.rx_ring.len = RX_RING_LEN_BITS; 616 MEM->init.tx_ring.adr_lo = offsetof( struct lance_memory, tx_head ); 617 MEM->init.tx_ring.adr_hi = 0; 618 MEM->init.tx_ring.len = TX_RING_LEN_BITS; 619 620 if (lp->cardtype == PAM_CARD) 621 IO->ivec = IRQ_SOURCE_TO_VECTOR(dev->irq); 622 else 623 *RIEBL_IVEC_ADDR = IRQ_SOURCE_TO_VECTOR(dev->irq); 624 625 if (did_version++ == 0) 626 DPRINTK( 1, ( version )); 627 628 dev->netdev_ops = &lance_netdev_ops; 629 630 /* XXX MSch */ 631 dev->watchdog_timeo = TX_TIMEOUT; 632 633 return 1; 634 } 635 636 637 static int lance_open( struct net_device *dev ) 638 { 639 struct lance_private *lp = netdev_priv(dev); 640 struct lance_ioreg *IO = lp->iobase; 641 int i; 642 643 DPRINTK( 2, ( "%s: lance_open()\n", dev->name )); 644 645 lance_init_ring(dev); 646 /* Re-initialize the LANCE, and start it when done. */ 647 648 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0); 649 REGA( CSR2 ) = 0; 650 REGA( CSR1 ) = 0; 651 REGA( CSR0 ) = CSR0_INIT; 652 /* From now on, AREG is kept to point to CSR0 */ 653 654 i = 1000000; 655 while (--i > 0) 656 if (DREG & CSR0_IDON) 657 break; 658 if (i <= 0 || (DREG & CSR0_ERR)) { 659 DPRINTK( 2, ( "lance_open(): opening %s failed, i=%d, csr0=%04x\n", 660 dev->name, i, DREG )); 661 DREG = CSR0_STOP; 662 return -EIO; 663 } 664 DREG = CSR0_IDON; 665 DREG = CSR0_STRT; 666 DREG = CSR0_INEA; 667 668 netif_start_queue (dev); 669 670 DPRINTK( 2, ( "%s: LANCE is open, csr0 %04x\n", dev->name, DREG )); 671 672 return 0; 673 } 674 675 676 /* Initialize the LANCE Rx and Tx rings. */ 677 678 static void lance_init_ring( struct net_device *dev ) 679 { 680 struct lance_private *lp = netdev_priv(dev); 681 int i; 682 unsigned offset; 683 684 lp->tx_full = 0; 685 lp->cur_rx = lp->cur_tx = 0; 686 lp->dirty_tx = 0; 687 688 offset = offsetof( struct lance_memory, packet_area ); 689 690 /* If the packet buffer at offset 'o' would conflict with the reserved area 691 * of RieblCards, advance it */ 692 #define CHECK_OFFSET(o) \ 693 do { \ 694 if (lp->cardtype == OLD_RIEBL || lp->cardtype == NEW_RIEBL) { \ 695 if (((o) < RIEBL_RSVD_START) ? (o)+PKT_BUF_SZ > RIEBL_RSVD_START \ 696 : (o) < RIEBL_RSVD_END) \ 697 (o) = RIEBL_RSVD_END; \ 698 } \ 699 } while(0) 700 701 for( i = 0; i < TX_RING_SIZE; i++ ) { 702 CHECK_OFFSET(offset); 703 MEM->tx_head[i].base = offset; 704 MEM->tx_head[i].flag = TMD1_OWN_HOST; 705 MEM->tx_head[i].base_hi = 0; 706 MEM->tx_head[i].length = 0; 707 MEM->tx_head[i].misc = 0; 708 offset += PKT_BUF_SZ; 709 } 710 711 for( i = 0; i < RX_RING_SIZE; i++ ) { 712 CHECK_OFFSET(offset); 713 MEM->rx_head[i].base = offset; 714 MEM->rx_head[i].flag = TMD1_OWN_CHIP; 715 MEM->rx_head[i].base_hi = 0; 716 MEM->rx_head[i].buf_length = -PKT_BUF_SZ; 717 MEM->rx_head[i].msg_length = 0; 718 offset += PKT_BUF_SZ; 719 } 720 } 721 722 723 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */ 724 725 726 static void lance_tx_timeout (struct net_device *dev, unsigned int txqueue) 727 { 728 struct lance_private *lp = netdev_priv(dev); 729 struct lance_ioreg *IO = lp->iobase; 730 731 AREG = CSR0; 732 DPRINTK( 1, ( "%s: transmit timed out, status %04x, resetting.\n", 733 dev->name, DREG )); 734 DREG = CSR0_STOP; 735 /* 736 * Always set BSWP after a STOP as STOP puts it back into 737 * little endian mode. 738 */ 739 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0); 740 dev->stats.tx_errors++; 741 #ifndef final_version 742 { int i; 743 DPRINTK( 2, ( "Ring data: dirty_tx %d cur_tx %d%s cur_rx %d\n", 744 lp->dirty_tx, lp->cur_tx, 745 lp->tx_full ? " (full)" : "", 746 lp->cur_rx )); 747 for( i = 0 ; i < RX_RING_SIZE; i++ ) 748 DPRINTK( 2, ( "rx #%d: base=%04x blen=%04x mlen=%04x\n", 749 i, MEM->rx_head[i].base, 750 -MEM->rx_head[i].buf_length, 751 MEM->rx_head[i].msg_length )); 752 for( i = 0 ; i < TX_RING_SIZE; i++ ) 753 DPRINTK( 2, ( "tx #%d: base=%04x len=%04x misc=%04x\n", 754 i, MEM->tx_head[i].base, 755 -MEM->tx_head[i].length, 756 MEM->tx_head[i].misc )); 757 } 758 #endif 759 /* XXX MSch: maybe purge/reinit ring here */ 760 /* lance_restart, essentially */ 761 lance_init_ring(dev); 762 REGA( CSR0 ) = CSR0_INEA | CSR0_INIT | CSR0_STRT; 763 netif_trans_update(dev); /* prevent tx timeout */ 764 netif_wake_queue(dev); 765 } 766 767 /* XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX */ 768 769 static netdev_tx_t 770 lance_start_xmit(struct sk_buff *skb, struct net_device *dev) 771 { 772 struct lance_private *lp = netdev_priv(dev); 773 struct lance_ioreg *IO = lp->iobase; 774 int entry, len; 775 struct lance_tx_head *head; 776 unsigned long flags; 777 778 DPRINTK( 2, ( "%s: lance_start_xmit() called, csr0 %4.4x.\n", 779 dev->name, DREG )); 780 781 782 /* The old LANCE chips doesn't automatically pad buffers to min. size. */ 783 len = skb->len; 784 if (len < ETH_ZLEN) 785 len = ETH_ZLEN; 786 /* PAM-Card has a bug: Can only send packets with even number of bytes! */ 787 else if (lp->cardtype == PAM_CARD && (len & 1)) 788 ++len; 789 790 if (len > skb->len) { 791 if (skb_padto(skb, len)) 792 return NETDEV_TX_OK; 793 } 794 795 netif_stop_queue (dev); 796 797 /* Fill in a Tx ring entry */ 798 if (lance_debug >= 3) { 799 printk( "%s: TX pkt type 0x%04x from %pM to %pM" 800 " data at 0x%08x len %d\n", 801 dev->name, ((u_short *)skb->data)[6], 802 &skb->data[6], skb->data, 803 (int)skb->data, (int)skb->len ); 804 } 805 806 /* We're not prepared for the int until the last flags are set/reset. And 807 * the int may happen already after setting the OWN_CHIP... */ 808 spin_lock_irqsave (&lp->devlock, flags); 809 810 /* Mask to ring buffer boundary. */ 811 entry = lp->cur_tx & TX_RING_MOD_MASK; 812 head = &(MEM->tx_head[entry]); 813 814 /* Caution: the write order is important here, set the "ownership" bits 815 * last. 816 */ 817 818 819 head->length = -len; 820 head->misc = 0; 821 lp->memcpy_f( PKTBUF_ADDR(head), (void *)skb->data, skb->len ); 822 head->flag = TMD1_OWN_CHIP | TMD1_ENP | TMD1_STP; 823 dev->stats.tx_bytes += skb->len; 824 dev_kfree_skb( skb ); 825 lp->cur_tx++; 826 while( lp->cur_tx >= TX_RING_SIZE && lp->dirty_tx >= TX_RING_SIZE ) { 827 lp->cur_tx -= TX_RING_SIZE; 828 lp->dirty_tx -= TX_RING_SIZE; 829 } 830 831 /* Trigger an immediate send poll. */ 832 DREG = CSR0_INEA | CSR0_TDMD; 833 834 if ((MEM->tx_head[(entry+1) & TX_RING_MOD_MASK].flag & TMD1_OWN) == 835 TMD1_OWN_HOST) 836 netif_start_queue (dev); 837 else 838 lp->tx_full = 1; 839 spin_unlock_irqrestore (&lp->devlock, flags); 840 841 return NETDEV_TX_OK; 842 } 843 844 /* The LANCE interrupt handler. */ 845 846 static irqreturn_t lance_interrupt( int irq, void *dev_id ) 847 { 848 struct net_device *dev = dev_id; 849 struct lance_private *lp; 850 struct lance_ioreg *IO; 851 int csr0, boguscnt = 10; 852 int handled = 0; 853 854 if (dev == NULL) { 855 DPRINTK( 1, ( "lance_interrupt(): interrupt for unknown device.\n" )); 856 return IRQ_NONE; 857 } 858 859 lp = netdev_priv(dev); 860 IO = lp->iobase; 861 spin_lock (&lp->devlock); 862 863 AREG = CSR0; 864 865 while( ((csr0 = DREG) & (CSR0_ERR | CSR0_TINT | CSR0_RINT)) && 866 --boguscnt >= 0) { 867 handled = 1; 868 /* Acknowledge all of the current interrupt sources ASAP. */ 869 DREG = csr0 & ~(CSR0_INIT | CSR0_STRT | CSR0_STOP | 870 CSR0_TDMD | CSR0_INEA); 871 872 DPRINTK( 2, ( "%s: interrupt csr0=%04x new csr=%04x.\n", 873 dev->name, csr0, DREG )); 874 875 if (csr0 & CSR0_RINT) /* Rx interrupt */ 876 lance_rx( dev ); 877 878 if (csr0 & CSR0_TINT) { /* Tx-done interrupt */ 879 int dirty_tx = lp->dirty_tx; 880 881 while( dirty_tx < lp->cur_tx) { 882 int entry = dirty_tx & TX_RING_MOD_MASK; 883 int status = MEM->tx_head[entry].flag; 884 885 if (status & TMD1_OWN_CHIP) 886 break; /* It still hasn't been Txed */ 887 888 MEM->tx_head[entry].flag = 0; 889 890 if (status & TMD1_ERR) { 891 /* There was an major error, log it. */ 892 int err_status = MEM->tx_head[entry].misc; 893 dev->stats.tx_errors++; 894 if (err_status & TMD3_RTRY) dev->stats.tx_aborted_errors++; 895 if (err_status & TMD3_LCAR) dev->stats.tx_carrier_errors++; 896 if (err_status & TMD3_LCOL) dev->stats.tx_window_errors++; 897 if (err_status & TMD3_UFLO) { 898 /* Ackk! On FIFO errors the Tx unit is turned off! */ 899 dev->stats.tx_fifo_errors++; 900 /* Remove this verbosity later! */ 901 DPRINTK( 1, ( "%s: Tx FIFO error! Status %04x\n", 902 dev->name, csr0 )); 903 /* Restart the chip. */ 904 DREG = CSR0_STRT; 905 } 906 } else { 907 if (status & (TMD1_MORE | TMD1_ONE | TMD1_DEF)) 908 dev->stats.collisions++; 909 dev->stats.tx_packets++; 910 } 911 912 /* XXX MSch: free skb?? */ 913 dirty_tx++; 914 } 915 916 #ifndef final_version 917 if (lp->cur_tx - dirty_tx >= TX_RING_SIZE) { 918 DPRINTK( 0, ( "out-of-sync dirty pointer," 919 " %d vs. %d, full=%ld.\n", 920 dirty_tx, lp->cur_tx, lp->tx_full )); 921 dirty_tx += TX_RING_SIZE; 922 } 923 #endif 924 925 if (lp->tx_full && (netif_queue_stopped(dev)) && 926 dirty_tx > lp->cur_tx - TX_RING_SIZE + 2) { 927 /* The ring is no longer full, clear tbusy. */ 928 lp->tx_full = 0; 929 netif_wake_queue (dev); 930 } 931 932 lp->dirty_tx = dirty_tx; 933 } 934 935 /* Log misc errors. */ 936 if (csr0 & CSR0_BABL) dev->stats.tx_errors++; /* Tx babble. */ 937 if (csr0 & CSR0_MISS) dev->stats.rx_errors++; /* Missed a Rx frame. */ 938 if (csr0 & CSR0_MERR) { 939 DPRINTK( 1, ( "%s: Bus master arbitration failure (?!?), " 940 "status %04x.\n", dev->name, csr0 )); 941 /* Restart the chip. */ 942 DREG = CSR0_STRT; 943 } 944 } 945 946 /* Clear any other interrupt, and set interrupt enable. */ 947 DREG = CSR0_BABL | CSR0_CERR | CSR0_MISS | CSR0_MERR | 948 CSR0_IDON | CSR0_INEA; 949 950 DPRINTK( 2, ( "%s: exiting interrupt, csr0=%#04x.\n", 951 dev->name, DREG )); 952 953 spin_unlock (&lp->devlock); 954 return IRQ_RETVAL(handled); 955 } 956 957 958 static int lance_rx( struct net_device *dev ) 959 { 960 struct lance_private *lp = netdev_priv(dev); 961 int entry = lp->cur_rx & RX_RING_MOD_MASK; 962 int i; 963 964 DPRINTK( 2, ( "%s: rx int, flag=%04x\n", dev->name, 965 MEM->rx_head[entry].flag )); 966 967 /* If we own the next entry, it's a new packet. Send it up. */ 968 while( (MEM->rx_head[entry].flag & RMD1_OWN) == RMD1_OWN_HOST ) { 969 struct lance_rx_head *head = &(MEM->rx_head[entry]); 970 int status = head->flag; 971 972 if (status != (RMD1_ENP|RMD1_STP)) { /* There was an error. */ 973 /* There is a tricky error noted by John Murphy, 974 <murf@perftech.com> to Russ Nelson: Even with full-sized 975 buffers it's possible for a jabber packet to use two 976 buffers, with only the last correctly noting the error. */ 977 if (status & RMD1_ENP) /* Only count a general error at the */ 978 dev->stats.rx_errors++; /* end of a packet.*/ 979 if (status & RMD1_FRAM) dev->stats.rx_frame_errors++; 980 if (status & RMD1_OFLO) dev->stats.rx_over_errors++; 981 if (status & RMD1_CRC) dev->stats.rx_crc_errors++; 982 if (status & RMD1_BUFF) dev->stats.rx_fifo_errors++; 983 head->flag &= (RMD1_ENP|RMD1_STP); 984 } else { 985 /* Malloc up new buffer, compatible with net-3. */ 986 short pkt_len = head->msg_length & 0xfff; 987 struct sk_buff *skb; 988 989 if (pkt_len < 60) { 990 printk( "%s: Runt packet!\n", dev->name ); 991 dev->stats.rx_errors++; 992 } 993 else { 994 skb = netdev_alloc_skb(dev, pkt_len + 2); 995 if (skb == NULL) { 996 for( i = 0; i < RX_RING_SIZE; i++ ) 997 if (MEM->rx_head[(entry+i) & RX_RING_MOD_MASK].flag & 998 RMD1_OWN_CHIP) 999 break; 1000 1001 if (i > RX_RING_SIZE - 2) { 1002 dev->stats.rx_dropped++; 1003 head->flag |= RMD1_OWN_CHIP; 1004 lp->cur_rx++; 1005 } 1006 break; 1007 } 1008 1009 if (lance_debug >= 3) { 1010 u_char *data = PKTBUF_ADDR(head); 1011 1012 printk(KERN_DEBUG "%s: RX pkt type 0x%04x from %pM to %pM " 1013 "data %8ph len %d\n", 1014 dev->name, ((u_short *)data)[6], 1015 &data[6], data, &data[15], pkt_len); 1016 } 1017 1018 skb_reserve( skb, 2 ); /* 16 byte align */ 1019 skb_put( skb, pkt_len ); /* Make room */ 1020 lp->memcpy_f( skb->data, PKTBUF_ADDR(head), pkt_len ); 1021 skb->protocol = eth_type_trans( skb, dev ); 1022 netif_rx( skb ); 1023 dev->stats.rx_packets++; 1024 dev->stats.rx_bytes += pkt_len; 1025 } 1026 } 1027 1028 head->flag |= RMD1_OWN_CHIP; 1029 entry = (++lp->cur_rx) & RX_RING_MOD_MASK; 1030 } 1031 lp->cur_rx &= RX_RING_MOD_MASK; 1032 1033 /* From lance.c (Donald Becker): */ 1034 /* We should check that at least two ring entries are free. If not, 1035 we should free one and mark stats->rx_dropped++. */ 1036 1037 return 0; 1038 } 1039 1040 1041 static int lance_close( struct net_device *dev ) 1042 { 1043 struct lance_private *lp = netdev_priv(dev); 1044 struct lance_ioreg *IO = lp->iobase; 1045 1046 netif_stop_queue (dev); 1047 1048 AREG = CSR0; 1049 1050 DPRINTK( 2, ( "%s: Shutting down ethercard, status was %2.2x.\n", 1051 dev->name, DREG )); 1052 1053 /* We stop the LANCE here -- it occasionally polls 1054 memory if we don't. */ 1055 DREG = CSR0_STOP; 1056 1057 return 0; 1058 } 1059 1060 1061 /* Set or clear the multicast filter for this adaptor. 1062 num_addrs == -1 Promiscuous mode, receive all packets 1063 num_addrs == 0 Normal mode, clear multicast list 1064 num_addrs > 0 Multicast mode, receive normal and MC packets, and do 1065 best-effort filtering. 1066 */ 1067 1068 static void set_multicast_list( struct net_device *dev ) 1069 { 1070 struct lance_private *lp = netdev_priv(dev); 1071 struct lance_ioreg *IO = lp->iobase; 1072 1073 if (netif_running(dev)) 1074 /* Only possible if board is already started */ 1075 return; 1076 1077 /* We take the simple way out and always enable promiscuous mode. */ 1078 DREG = CSR0_STOP; /* Temporarily stop the lance. */ 1079 1080 if (dev->flags & IFF_PROMISC) { 1081 /* Log any net taps. */ 1082 DPRINTK( 2, ( "%s: Promiscuous mode enabled.\n", dev->name )); 1083 REGA( CSR15 ) = 0x8000; /* Set promiscuous mode */ 1084 } else { 1085 short multicast_table[4]; 1086 int num_addrs = netdev_mc_count(dev); 1087 int i; 1088 /* We don't use the multicast table, but rely on upper-layer 1089 * filtering. */ 1090 memset( multicast_table, (num_addrs == 0) ? 0 : -1, 1091 sizeof(multicast_table) ); 1092 for( i = 0; i < 4; i++ ) 1093 REGA( CSR8+i ) = multicast_table[i]; 1094 REGA( CSR15 ) = 0; /* Unset promiscuous mode */ 1095 } 1096 1097 /* 1098 * Always set BSWP after a STOP as STOP puts it back into 1099 * little endian mode. 1100 */ 1101 REGA( CSR3 ) = CSR3_BSWP | (lp->cardtype == PAM_CARD ? CSR3_ACON : 0); 1102 1103 /* Resume normal operation and reset AREG to CSR0 */ 1104 REGA( CSR0 ) = CSR0_IDON | CSR0_INEA | CSR0_STRT; 1105 } 1106 1107 1108 /* This is needed for old RieblCards and possible for new RieblCards */ 1109 1110 static int lance_set_mac_address( struct net_device *dev, void *addr ) 1111 { 1112 struct lance_private *lp = netdev_priv(dev); 1113 struct sockaddr *saddr = addr; 1114 int i; 1115 1116 if (lp->cardtype != OLD_RIEBL && lp->cardtype != NEW_RIEBL) 1117 return -EOPNOTSUPP; 1118 1119 if (netif_running(dev)) { 1120 /* Only possible while card isn't started */ 1121 DPRINTK( 1, ( "%s: hwaddr can be set only while card isn't open.\n", 1122 dev->name )); 1123 return -EIO; 1124 } 1125 1126 memcpy( dev->dev_addr, saddr->sa_data, dev->addr_len ); 1127 for( i = 0; i < 6; i++ ) 1128 MEM->init.hwaddr[i] = dev->dev_addr[i^1]; /* <- 16 bit swap! */ 1129 lp->memcpy_f( RIEBL_HWADDR_ADDR, dev->dev_addr, 6 ); 1130 /* set also the magic for future sessions */ 1131 *RIEBL_MAGIC_ADDR = RIEBL_MAGIC; 1132 1133 return 0; 1134 } 1135 1136 static struct net_device *atarilance_dev; 1137 1138 static int __init atarilance_module_init(void) 1139 { 1140 atarilance_dev = atarilance_probe(); 1141 return PTR_ERR_OR_ZERO(atarilance_dev); 1142 } 1143 1144 static void __exit atarilance_module_exit(void) 1145 { 1146 unregister_netdev(atarilance_dev); 1147 free_irq(atarilance_dev->irq, atarilance_dev); 1148 free_netdev(atarilance_dev); 1149 } 1150 module_init(atarilance_module_init); 1151 module_exit(atarilance_module_exit); 1152