1 /*------------------------------------------------------------------------ 2 * lan91c96.c 3 * This is a driver for SMSC's LAN91C96 single-chip Ethernet device, based 4 * on the SMC91111 driver from U-boot. 5 * 6 * (C) Copyright 2002 7 * Sysgo Real-Time Solutions, GmbH <www.elinos.com> 8 * Rolf Offermanns <rof@sysgo.de> 9 * 10 * Copyright (C) 2001 Standard Microsystems Corporation (SMSC) 11 * Developed by Simple Network Magic Corporation (SNMC) 12 * Copyright (C) 1996 by Erik Stahlman (ES) 13 * 14 * This program is free software; you can redistribute it and/or modify 15 * it under the terms of the GNU General Public License as published by 16 * the Free Software Foundation; either version 2 of the License, or 17 * (at your option) any later version. 18 * 19 * This program is distributed in the hope that it will be useful, 20 * but WITHOUT ANY WARRANTY; without even the implied warranty of 21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 22 * GNU General Public License for more details. 23 * 24 * You should have received a copy of the GNU General Public License 25 * along with this program; if not, write to the Free Software 26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 27 * 28 * Information contained in this file was obtained from the LAN91C96 29 * manual from SMC. To get a copy, if you really want one, you can find 30 * information under www.smsc.com. 31 * 32 * 33 * "Features" of the SMC chip: 34 * 6144 byte packet memory. ( for the 91C96 ) 35 * EEPROM for configuration 36 * AUI/TP selection ( mine has 10Base2/10BaseT select ) 37 * 38 * Arguments: 39 * io = for the base address 40 * irq = for the IRQ 41 * 42 * author: 43 * Erik Stahlman ( erik@vt.edu ) 44 * Daris A Nevil ( dnevil@snmc.com ) 45 * 46 * 47 * Hardware multicast code from Peter Cammaert ( pc@denkart.be ) 48 * 49 * Sources: 50 * o SMSC LAN91C96 databook (www.smsc.com) 51 * o smc91111.c (u-boot driver) 52 * o smc9194.c (linux kernel driver) 53 * o lan91c96.c (Intel Diagnostic Manager driver) 54 * 55 * History: 56 * 04/30/03 Mathijs Haarman Modified smc91111.c (u-boot version) 57 * for lan91c96 58 *--------------------------------------------------------------------------- 59 */ 60 61 #include <common.h> 62 #include <command.h> 63 #include "lan91c96.h" 64 #include <net.h> 65 66 /*------------------------------------------------------------------------ 67 * 68 * Configuration options, for the experienced user to change. 69 * 70 -------------------------------------------------------------------------*/ 71 72 /* Use power-down feature of the chip */ 73 #define POWER_DOWN 0 74 75 /* 76 * Wait time for memory to be free. This probably shouldn't be 77 * tuned that much, as waiting for this means nothing else happens 78 * in the system 79 */ 80 #define MEMORY_WAIT_TIME 16 81 82 #define SMC_DEBUG 0 83 84 #if (SMC_DEBUG > 2 ) 85 #define PRINTK3(args...) printf(args) 86 #else 87 #define PRINTK3(args...) 88 #endif 89 90 #if SMC_DEBUG > 1 91 #define PRINTK2(args...) printf(args) 92 #else 93 #define PRINTK2(args...) 94 #endif 95 96 #ifdef SMC_DEBUG 97 #define PRINTK(args...) printf(args) 98 #else 99 #define PRINTK(args...) 100 #endif 101 102 103 /*------------------------------------------------------------------------ 104 * 105 * The internal workings of the driver. If you are changing anything 106 * here with the SMC stuff, you should have the datasheet and know 107 * what you are doing. 108 * 109 *------------------------------------------------------------------------ 110 */ 111 #define CARDNAME "LAN91C96" 112 113 #define SMC_BASE_ADDRESS CONFIG_LAN91C96_BASE 114 115 #define SMC_DEV_NAME "LAN91C96" 116 #define SMC_ALLOC_MAX_TRY 5 117 #define SMC_TX_TIMEOUT 30 118 119 #define ETH_ZLEN 60 120 121 #ifdef CONFIG_LAN91C96_USE_32_BIT 122 #define USE_32_BIT 1 123 #else 124 #undef USE_32_BIT 125 #endif 126 127 /*----------------------------------------------------------------- 128 * 129 * The driver can be entered at any of the following entry points. 130 * 131 *----------------------------------------------------------------- 132 */ 133 134 extern int eth_init (bd_t * bd); 135 extern void eth_halt (void); 136 extern int eth_rx (void); 137 extern int eth_send (volatile void *packet, int length); 138 #if 0 139 static int smc_hw_init (void); 140 #endif 141 142 /* 143 * This is called by register_netdev(). It is responsible for 144 * checking the portlist for the SMC9000 series chipset. If it finds 145 * one, then it will initialize the device, find the hardware information, 146 * and sets up the appropriate device parameters. 147 * NOTE: Interrupts are *OFF* when this procedure is called. 148 * 149 * NB:This shouldn't be static since it is referred to externally. 150 */ 151 int smc_init (void); 152 153 /* 154 * This is called by unregister_netdev(). It is responsible for 155 * cleaning up before the driver is finally unregistered and discarded. 156 */ 157 void smc_destructor (void); 158 159 /* 160 * The kernel calls this function when someone wants to use the device, 161 * typically 'ifconfig ethX up'. 162 */ 163 static int smc_open (bd_t *bd); 164 165 166 /* 167 * This is called by the kernel in response to 'ifconfig ethX down'. It 168 * is responsible for cleaning up everything that the open routine 169 * does, and maybe putting the card into a powerdown state. 170 */ 171 static int smc_close (void); 172 173 /* 174 * This is a separate procedure to handle the receipt of a packet, to 175 * leave the interrupt code looking slightly cleaner 176 */ 177 static int smc_rcv (void); 178 179 /* See if a MAC address is defined in the current environment. If so use it. If not 180 . print a warning and set the environment and other globals with the default. 181 . If an EEPROM is present it really should be consulted. 182 */ 183 int smc_get_ethaddr(bd_t *bd); 184 int get_rom_mac(unsigned char *v_rom_mac); 185 186 /* ------------------------------------------------------------ 187 * Internal routines 188 * ------------------------------------------------------------ 189 */ 190 191 static unsigned char smc_mac_addr[] = { 0xc0, 0x00, 0x00, 0x1b, 0x62, 0x9c }; 192 193 /* 194 * This function must be called before smc_open() if you want to override 195 * the default mac address. 196 */ 197 198 void smc_set_mac_addr (const unsigned char *addr) 199 { 200 int i; 201 202 for (i = 0; i < sizeof (smc_mac_addr); i++) { 203 smc_mac_addr[i] = addr[i]; 204 } 205 } 206 207 /* 208 * smc_get_macaddr is no longer used. If you want to override the default 209 * mac address, call smc_get_mac_addr as a part of the board initialisation. 210 */ 211 212 #if 0 213 void smc_get_macaddr (byte * addr) 214 { 215 /* MAC ADDRESS AT FLASHBLOCK 1 / OFFSET 0x10 */ 216 unsigned char *dnp1110_mac = (unsigned char *) (0xE8000000 + 0x20010); 217 int i; 218 219 220 for (i = 0; i < 6; i++) { 221 addr[0] = *(dnp1110_mac + 0); 222 addr[1] = *(dnp1110_mac + 1); 223 addr[2] = *(dnp1110_mac + 2); 224 addr[3] = *(dnp1110_mac + 3); 225 addr[4] = *(dnp1110_mac + 4); 226 addr[5] = *(dnp1110_mac + 5); 227 } 228 } 229 #endif /* 0 */ 230 231 /*********************************************** 232 * Show available memory * 233 ***********************************************/ 234 void dump_memory_info (void) 235 { 236 word mem_info; 237 word old_bank; 238 239 old_bank = SMC_inw (LAN91C96_BANK_SELECT) & 0xF; 240 241 SMC_SELECT_BANK (0); 242 mem_info = SMC_inw (LAN91C96_MIR); 243 PRINTK2 ("Memory: %4d available\n", (mem_info >> 8) * 2048); 244 245 SMC_SELECT_BANK (old_bank); 246 } 247 248 /* 249 * A rather simple routine to print out a packet for debugging purposes. 250 */ 251 #if SMC_DEBUG > 2 252 static void print_packet (byte *, int); 253 #endif 254 255 /* #define tx_done(dev) 1 */ 256 257 258 /* this does a soft reset on the device */ 259 static void smc_reset (void); 260 261 /* Enable Interrupts, Receive, and Transmit */ 262 static void smc_enable (void); 263 264 /* this puts the device in an inactive state */ 265 static void smc_shutdown (void); 266 267 268 static int poll4int (byte mask, int timeout) 269 { 270 int tmo = get_timer (0) + timeout * CONFIG_SYS_HZ; 271 int is_timeout = 0; 272 word old_bank = SMC_inw (LAN91C96_BANK_SELECT); 273 274 PRINTK2 ("Polling...\n"); 275 SMC_SELECT_BANK (2); 276 while ((SMC_inw (LAN91C96_INT_STATS) & mask) == 0) { 277 if (get_timer (0) >= tmo) { 278 is_timeout = 1; 279 break; 280 } 281 } 282 283 /* restore old bank selection */ 284 SMC_SELECT_BANK (old_bank); 285 286 if (is_timeout) 287 return 1; 288 else 289 return 0; 290 } 291 292 /* 293 * Function: smc_reset( void ) 294 * Purpose: 295 * This sets the SMC91111 chip to its normal state, hopefully from whatever 296 * mess that any other DOS driver has put it in. 297 * 298 * Maybe I should reset more registers to defaults in here? SOFTRST should 299 * do that for me. 300 * 301 * Method: 302 * 1. send a SOFT RESET 303 * 2. wait for it to finish 304 * 3. enable autorelease mode 305 * 4. reset the memory management unit 306 * 5. clear all interrupts 307 * 308 */ 309 static void smc_reset (void) 310 { 311 PRINTK2 ("%s:smc_reset\n", SMC_DEV_NAME); 312 313 /* This resets the registers mostly to defaults, but doesn't 314 affect EEPROM. That seems unnecessary */ 315 SMC_SELECT_BANK (0); 316 SMC_outw (LAN91C96_RCR_SOFT_RST, LAN91C96_RCR); 317 318 udelay (10); 319 320 /* Disable transmit and receive functionality */ 321 SMC_outw (0, LAN91C96_RCR); 322 SMC_outw (0, LAN91C96_TCR); 323 324 /* set the control register */ 325 SMC_SELECT_BANK (1); 326 SMC_outw (SMC_inw (LAN91C96_CONTROL) | LAN91C96_CTR_BIT_8, 327 LAN91C96_CONTROL); 328 329 /* Disable all interrupts */ 330 SMC_outb (0, LAN91C96_INT_MASK); 331 } 332 333 /* 334 * Function: smc_enable 335 * Purpose: let the chip talk to the outside work 336 * Method: 337 * 1. Initialize the Memory Configuration Register 338 * 2. Enable the transmitter 339 * 3. Enable the receiver 340 */ 341 static void smc_enable () 342 { 343 PRINTK2 ("%s:smc_enable\n", SMC_DEV_NAME); 344 SMC_SELECT_BANK (0); 345 346 /* Initialize the Memory Configuration Register. See page 347 49 of the LAN91C96 data sheet for details. */ 348 SMC_outw (LAN91C96_MCR_TRANSMIT_PAGES, LAN91C96_MCR); 349 350 /* Initialize the Transmit Control Register */ 351 SMC_outw (LAN91C96_TCR_TXENA, LAN91C96_TCR); 352 /* Initialize the Receive Control Register 353 * FIXME: 354 * The promiscuous bit set because I could not receive ARP reply 355 * packets from the server when I send a ARP request. It only works 356 * when I set the promiscuous bit 357 */ 358 SMC_outw (LAN91C96_RCR_RXEN | LAN91C96_RCR_PRMS, LAN91C96_RCR); 359 } 360 361 /* 362 * Function: smc_shutdown 363 * Purpose: closes down the SMC91xxx chip. 364 * Method: 365 * 1. zero the interrupt mask 366 * 2. clear the enable receive flag 367 * 3. clear the enable xmit flags 368 * 369 * TODO: 370 * (1) maybe utilize power down mode. 371 * Why not yet? Because while the chip will go into power down mode, 372 * the manual says that it will wake up in response to any I/O requests 373 * in the register space. Empirical results do not show this working. 374 */ 375 static void smc_shutdown () 376 { 377 PRINTK2 (CARDNAME ":smc_shutdown\n"); 378 379 /* no more interrupts for me */ 380 SMC_SELECT_BANK (2); 381 SMC_outb (0, LAN91C96_INT_MASK); 382 383 /* and tell the card to stay away from that nasty outside world */ 384 SMC_SELECT_BANK (0); 385 SMC_outb (0, LAN91C96_RCR); 386 SMC_outb (0, LAN91C96_TCR); 387 } 388 389 390 /* 391 * Function: smc_hardware_send_packet(struct net_device * ) 392 * Purpose: 393 * This sends the actual packet to the SMC9xxx chip. 394 * 395 * Algorithm: 396 * First, see if a saved_skb is available. 397 * ( this should NOT be called if there is no 'saved_skb' 398 * Now, find the packet number that the chip allocated 399 * Point the data pointers at it in memory 400 * Set the length word in the chip's memory 401 * Dump the packet to chip memory 402 * Check if a last byte is needed ( odd length packet ) 403 * if so, set the control flag right 404 * Tell the card to send it 405 * Enable the transmit interrupt, so I know if it failed 406 * Free the kernel data if I actually sent it. 407 */ 408 static int smc_send_packet (volatile void *packet, int packet_length) 409 { 410 byte packet_no; 411 unsigned long ioaddr; 412 byte *buf; 413 int length; 414 int numPages; 415 int try = 0; 416 int time_out; 417 byte status; 418 419 420 PRINTK3 ("%s:smc_hardware_send_packet\n", SMC_DEV_NAME); 421 422 length = ETH_ZLEN < packet_length ? packet_length : ETH_ZLEN; 423 424 /* allocate memory 425 ** The MMU wants the number of pages to be the number of 256 bytes 426 ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) ) 427 ** 428 ** The 91C111 ignores the size bits, but the code is left intact 429 ** for backwards and future compatibility. 430 ** 431 ** Pkt size for allocating is data length +6 (for additional status 432 ** words, length and ctl!) 433 ** 434 ** If odd size then last byte is included in this header. 435 */ 436 numPages = ((length & 0xfffe) + 6); 437 numPages >>= 8; /* Divide by 256 */ 438 439 if (numPages > 7) { 440 printf ("%s: Far too big packet error. \n", SMC_DEV_NAME); 441 return 0; 442 } 443 444 /* now, try to allocate the memory */ 445 446 SMC_SELECT_BANK (2); 447 SMC_outw (LAN91C96_MMUCR_ALLOC_TX | numPages, LAN91C96_MMU); 448 449 again: 450 try++; 451 time_out = MEMORY_WAIT_TIME; 452 do { 453 status = SMC_inb (LAN91C96_INT_STATS); 454 if (status & LAN91C96_IST_ALLOC_INT) { 455 456 SMC_outb (LAN91C96_IST_ALLOC_INT, LAN91C96_INT_STATS); 457 break; 458 } 459 } while (--time_out); 460 461 if (!time_out) { 462 PRINTK2 ("%s: memory allocation, try %d failed ...\n", 463 SMC_DEV_NAME, try); 464 if (try < SMC_ALLOC_MAX_TRY) 465 goto again; 466 else 467 return 0; 468 } 469 470 PRINTK2 ("%s: memory allocation, try %d succeeded ...\n", 471 SMC_DEV_NAME, try); 472 473 /* I can send the packet now.. */ 474 475 ioaddr = SMC_BASE_ADDRESS; 476 477 buf = (byte *) packet; 478 479 /* If I get here, I _know_ there is a packet slot waiting for me */ 480 packet_no = SMC_inb (LAN91C96_ARR); 481 if (packet_no & LAN91C96_ARR_FAILED) { 482 /* or isn't there? BAD CHIP! */ 483 printf ("%s: Memory allocation failed. \n", SMC_DEV_NAME); 484 return 0; 485 } 486 487 /* we have a packet address, so tell the card to use it */ 488 SMC_outb (packet_no, LAN91C96_PNR); 489 490 /* point to the beginning of the packet */ 491 SMC_outw (LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER); 492 493 PRINTK3 ("%s: Trying to xmit packet of length %x\n", 494 SMC_DEV_NAME, length); 495 496 #if SMC_DEBUG > 2 497 printf ("Transmitting Packet\n"); 498 print_packet (buf, length); 499 #endif 500 501 /* send the packet length ( +6 for status, length and ctl byte ) 502 and the status word ( set to zeros ) */ 503 #ifdef USE_32_BIT 504 SMC_outl ((length + 6) << 16, LAN91C96_DATA_HIGH); 505 #else 506 SMC_outw (0, LAN91C96_DATA_HIGH); 507 /* send the packet length ( +6 for status words, length, and ctl */ 508 SMC_outw ((length + 6), LAN91C96_DATA_HIGH); 509 #endif /* USE_32_BIT */ 510 511 /* send the actual data 512 * I _think_ it's faster to send the longs first, and then 513 * mop up by sending the last word. It depends heavily 514 * on alignment, at least on the 486. Maybe it would be 515 * a good idea to check which is optimal? But that could take 516 * almost as much time as is saved? 517 */ 518 #ifdef USE_32_BIT 519 SMC_outsl (LAN91C96_DATA_HIGH, buf, length >> 2); 520 if (length & 0x2) 521 SMC_outw (*((word *) (buf + (length & 0xFFFFFFFC))), 522 LAN91C96_DATA_HIGH); 523 #else 524 SMC_outsw (LAN91C96_DATA_HIGH, buf, (length) >> 1); 525 #endif /* USE_32_BIT */ 526 527 /* Send the last byte, if there is one. */ 528 if ((length & 1) == 0) { 529 SMC_outw (0, LAN91C96_DATA_HIGH); 530 } else { 531 SMC_outw (buf[length - 1] | 0x2000, LAN91C96_DATA_HIGH); 532 } 533 534 /* and let the chipset deal with it */ 535 SMC_outw (LAN91C96_MMUCR_ENQUEUE, LAN91C96_MMU); 536 537 /* poll for TX INT */ 538 if (poll4int (LAN91C96_MSK_TX_INT, SMC_TX_TIMEOUT)) { 539 /* sending failed */ 540 PRINTK2 ("%s: TX timeout, sending failed...\n", SMC_DEV_NAME); 541 542 /* release packet */ 543 SMC_outw (LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU); 544 545 /* wait for MMU getting ready (low) */ 546 while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) { 547 udelay (10); 548 } 549 550 PRINTK2 ("MMU ready\n"); 551 552 553 return 0; 554 } else { 555 /* ack. int */ 556 SMC_outw (LAN91C96_IST_TX_INT, LAN91C96_INT_STATS); 557 558 PRINTK2 ("%s: Sent packet of length %d \n", SMC_DEV_NAME, length); 559 560 /* release packet */ 561 SMC_outw (LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU); 562 563 /* wait for MMU getting ready (low) */ 564 while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) { 565 udelay (10); 566 } 567 568 PRINTK2 ("MMU ready\n"); 569 } 570 571 return length; 572 } 573 574 /*------------------------------------------------------------------------- 575 * smc_destructor( struct net_device * dev ) 576 * Input parameters: 577 * dev, pointer to the device structure 578 * 579 * Output: 580 * None. 581 *-------------------------------------------------------------------------- 582 */ 583 void smc_destructor () 584 { 585 PRINTK2 (CARDNAME ":smc_destructor\n"); 586 } 587 588 589 /* 590 * Open and Initialize the board 591 * 592 * Set up everything, reset the card, etc .. 593 * 594 */ 595 static int smc_open (bd_t *bd) 596 { 597 int i, err; /* used to set hw ethernet address */ 598 599 PRINTK2 ("%s:smc_open\n", SMC_DEV_NAME); 600 601 /* reset the hardware */ 602 603 smc_reset (); 604 smc_enable (); 605 606 SMC_SELECT_BANK (1); 607 608 err = smc_get_ethaddr (bd); /* set smc_mac_addr, and sync it with u-boot globals */ 609 if (err < 0) 610 return -1; 611 #ifdef USE_32_BIT 612 for (i = 0; i < 6; i += 2) { 613 word address; 614 615 address = smc_mac_addr[i + 1] << 8; 616 address |= smc_mac_addr[i]; 617 SMC_outw (address, LAN91C96_IA0 + i); 618 } 619 #else 620 for (i = 0; i < 6; i++) 621 SMC_outb (smc_mac_addr[i], LAN91C96_IA0 + i); 622 #endif 623 return 0; 624 } 625 626 /*------------------------------------------------------------- 627 * 628 * smc_rcv - receive a packet from the card 629 * 630 * There is ( at least ) a packet waiting to be read from 631 * chip-memory. 632 * 633 * o Read the status 634 * o If an error, record it 635 * o otherwise, read in the packet 636 *------------------------------------------------------------- 637 */ 638 static int smc_rcv () 639 { 640 int packet_number; 641 word status; 642 word packet_length; 643 int is_error = 0; 644 645 #ifdef USE_32_BIT 646 dword stat_len; 647 #endif 648 649 650 SMC_SELECT_BANK (2); 651 packet_number = SMC_inw (LAN91C96_FIFO); 652 653 if (packet_number & LAN91C96_FIFO_RXEMPTY) { 654 return 0; 655 } 656 657 PRINTK3 ("%s:smc_rcv\n", SMC_DEV_NAME); 658 /* start reading from the start of the packet */ 659 SMC_outw (LAN91C96_PTR_READ | LAN91C96_PTR_RCV | 660 LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER); 661 662 /* First two words are status and packet_length */ 663 #ifdef USE_32_BIT 664 stat_len = SMC_inl (LAN91C96_DATA_HIGH); 665 status = stat_len & 0xffff; 666 packet_length = stat_len >> 16; 667 #else 668 status = SMC_inw (LAN91C96_DATA_HIGH); 669 packet_length = SMC_inw (LAN91C96_DATA_HIGH); 670 #endif 671 672 packet_length &= 0x07ff; /* mask off top bits */ 673 674 PRINTK2 ("RCV: STATUS %4x LENGTH %4x\n", status, packet_length); 675 676 if (!(status & FRAME_FILTER)) { 677 /* Adjust for having already read the first two words */ 678 packet_length -= 4; /*4; */ 679 680 681 /* set odd length for bug in LAN91C111, */ 682 /* which never sets RS_ODDFRAME */ 683 /* TODO ? */ 684 685 686 #ifdef USE_32_BIT 687 PRINTK3 (" Reading %d dwords (and %d bytes) \n", 688 packet_length >> 2, packet_length & 3); 689 /* QUESTION: Like in the TX routine, do I want 690 to send the DWORDs or the bytes first, or some 691 mixture. A mixture might improve already slow PIO 692 performance */ 693 SMC_insl (LAN91C96_DATA_HIGH, NetRxPackets[0], packet_length >> 2); 694 /* read the left over bytes */ 695 if (packet_length & 3) { 696 int i; 697 698 byte *tail = (byte *) (NetRxPackets[0] + (packet_length & ~3)); 699 dword leftover = SMC_inl (LAN91C96_DATA_HIGH); 700 701 for (i = 0; i < (packet_length & 3); i++) 702 *tail++ = (byte) (leftover >> (8 * i)) & 0xff; 703 } 704 #else 705 PRINTK3 (" Reading %d words and %d byte(s) \n", 706 (packet_length >> 1), packet_length & 1); 707 SMC_insw (LAN91C96_DATA_HIGH, NetRxPackets[0], packet_length >> 1); 708 709 #endif /* USE_32_BIT */ 710 711 #if SMC_DEBUG > 2 712 printf ("Receiving Packet\n"); 713 print_packet (NetRxPackets[0], packet_length); 714 #endif 715 } else { 716 /* error ... */ 717 /* TODO ? */ 718 is_error = 1; 719 } 720 721 while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) 722 udelay (1); /* Wait until not busy */ 723 724 /* error or good, tell the card to get rid of this packet */ 725 SMC_outw (LAN91C96_MMUCR_RELEASE_RX, LAN91C96_MMU); 726 727 while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) 728 udelay (1); /* Wait until not busy */ 729 730 if (!is_error) { 731 /* Pass the packet up to the protocol layers. */ 732 NetReceive (NetRxPackets[0], packet_length); 733 return packet_length; 734 } else { 735 return 0; 736 } 737 738 } 739 740 /*---------------------------------------------------- 741 * smc_close 742 * 743 * this makes the board clean up everything that it can 744 * and not talk to the outside world. Caused by 745 * an 'ifconfig ethX down' 746 * 747 -----------------------------------------------------*/ 748 static int smc_close () 749 { 750 PRINTK2 ("%s:smc_close\n", SMC_DEV_NAME); 751 752 /* clear everything */ 753 smc_shutdown (); 754 755 return 0; 756 } 757 758 #if SMC_DEBUG > 2 759 static void print_packet (byte * buf, int length) 760 { 761 #if 0 762 int i; 763 int remainder; 764 int lines; 765 766 printf ("Packet of length %d \n", length); 767 768 lines = length / 16; 769 remainder = length % 16; 770 771 for (i = 0; i < lines; i++) { 772 int cur; 773 774 for (cur = 0; cur < 8; cur++) { 775 byte a, b; 776 777 a = *(buf++); 778 b = *(buf++); 779 printf ("%02x%02x ", a, b); 780 } 781 printf ("\n"); 782 } 783 for (i = 0; i < remainder / 2; i++) { 784 byte a, b; 785 786 a = *(buf++); 787 b = *(buf++); 788 printf ("%02x%02x ", a, b); 789 } 790 printf ("\n"); 791 #endif /* 0 */ 792 } 793 #endif /* SMC_DEBUG > 2 */ 794 795 int eth_init (bd_t * bd) 796 { 797 return (smc_open(bd)); 798 } 799 800 void eth_halt () 801 { 802 smc_close (); 803 } 804 805 int eth_rx () 806 { 807 return smc_rcv (); 808 } 809 810 int eth_send (volatile void *packet, int length) 811 { 812 return smc_send_packet (packet, length); 813 } 814 815 816 #if 0 817 /*------------------------------------------------------------------------- 818 * smc_hw_init() 819 * 820 * Function: 821 * Reset and enable the device, check if the I/O space location 822 * is correct 823 * 824 * Input parameters: 825 * None 826 * 827 * Output: 828 * 0 --> success 829 * 1 --> error 830 *-------------------------------------------------------------------------- 831 */ 832 static int smc_hw_init () 833 { 834 unsigned short status_test; 835 836 /* The attribute register of the LAN91C96 is located at address 837 0x0e000000 on the lubbock platform */ 838 volatile unsigned *attaddr = (unsigned *) (0x0e000000); 839 840 /* first reset, then enable the device. Sequence is critical */ 841 attaddr[LAN91C96_ECOR] |= LAN91C96_ECOR_SRESET; 842 udelay (100); 843 attaddr[LAN91C96_ECOR] &= ~LAN91C96_ECOR_SRESET; 844 attaddr[LAN91C96_ECOR] |= LAN91C96_ECOR_ENABLE; 845 846 /* force 16-bit mode */ 847 attaddr[LAN91C96_ECSR] &= ~LAN91C96_ECSR_IOIS8; 848 udelay (100); 849 850 /* check if the I/O address is correct, the upper byte of the 851 bank select register should read 0x33 */ 852 853 status_test = SMC_inw (LAN91C96_BANK_SELECT); 854 if ((status_test & 0xFF00) != 0x3300) { 855 printf ("Failed to initialize ethernetchip\n"); 856 return 1; 857 } 858 return 0; 859 } 860 #endif /* 0 */ 861 862 /* smc_get_ethaddr (bd_t * bd) 863 * 864 * This checks both the environment and the ROM for an ethernet address. If 865 * found, the environment takes precedence. 866 */ 867 868 int smc_get_ethaddr (bd_t * bd) 869 { 870 uchar v_mac[6]; 871 872 if (!eth_getenv_enetaddr("ethaddr", v_mac)) { 873 /* get ROM mac value if any */ 874 if (!get_rom_mac(v_mac)) { 875 printf("\n*** ERROR: ethaddr is NOT set !!\n"); 876 return -1; 877 } 878 eth_setenv_enetaddr("ethaddr", v_mac); 879 } 880 881 smc_set_mac_addr(v_mac); /* use old function to update smc default */ 882 PRINTK("Using MAC Address %pM\n", v_mac); 883 return 0; 884 } 885 886 /* 887 * get_rom_mac() 888 * Note, this has omly been tested for the OMAP730 P2. 889 */ 890 891 int get_rom_mac (unsigned char *v_rom_mac) 892 { 893 #ifdef HARDCODE_MAC /* used for testing or to supress run time warnings */ 894 char hw_mac_addr[] = { 0x02, 0x80, 0xad, 0x20, 0x31, 0xb8 }; 895 896 memcpy (v_rom_mac, hw_mac_addr, 6); 897 return (1); 898 #else 899 int i; 900 SMC_SELECT_BANK (1); 901 for (i=0; i<6; i++) 902 { 903 v_rom_mac[i] = SMC_inb (LAN91C96_IA0 + i); 904 } 905 return (1); 906 #endif 907 } 908