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 #ifdef CONFIG_DRIVER_LAN91C96 67 68 #if defined(CONFIG_CMD_NET) 69 70 /*------------------------------------------------------------------------ 71 * 72 * Configuration options, for the experienced user to change. 73 * 74 -------------------------------------------------------------------------*/ 75 76 /* Use power-down feature of the chip */ 77 #define POWER_DOWN 0 78 79 /* 80 * Wait time for memory to be free. This probably shouldn't be 81 * tuned that much, as waiting for this means nothing else happens 82 * in the system 83 */ 84 #define MEMORY_WAIT_TIME 16 85 86 #define SMC_DEBUG 0 87 88 #if (SMC_DEBUG > 2 ) 89 #define PRINTK3(args...) printf(args) 90 #else 91 #define PRINTK3(args...) 92 #endif 93 94 #if SMC_DEBUG > 1 95 #define PRINTK2(args...) printf(args) 96 #else 97 #define PRINTK2(args...) 98 #endif 99 100 #ifdef SMC_DEBUG 101 #define PRINTK(args...) printf(args) 102 #else 103 #define PRINTK(args...) 104 #endif 105 106 107 /*------------------------------------------------------------------------ 108 * 109 * The internal workings of the driver. If you are changing anything 110 * here with the SMC stuff, you should have the datasheet and know 111 * what you are doing. 112 * 113 *------------------------------------------------------------------------ 114 */ 115 #define CARDNAME "LAN91C96" 116 117 #define SMC_BASE_ADDRESS CONFIG_LAN91C96_BASE 118 119 #define SMC_DEV_NAME "LAN91C96" 120 #define SMC_ALLOC_MAX_TRY 5 121 #define SMC_TX_TIMEOUT 30 122 123 #define ETH_ZLEN 60 124 125 #ifdef CONFIG_LAN91C96_USE_32_BIT 126 #define USE_32_BIT 1 127 #else 128 #undef USE_32_BIT 129 #endif 130 131 /*----------------------------------------------------------------- 132 * 133 * The driver can be entered at any of the following entry points. 134 * 135 *----------------------------------------------------------------- 136 */ 137 138 extern int eth_init (bd_t * bd); 139 extern void eth_halt (void); 140 extern int eth_rx (void); 141 extern int eth_send (volatile void *packet, int length); 142 #if 0 143 static int smc_hw_init (void); 144 #endif 145 146 /* 147 * This is called by register_netdev(). It is responsible for 148 * checking the portlist for the SMC9000 series chipset. If it finds 149 * one, then it will initialize the device, find the hardware information, 150 * and sets up the appropriate device parameters. 151 * NOTE: Interrupts are *OFF* when this procedure is called. 152 * 153 * NB:This shouldn't be static since it is referred to externally. 154 */ 155 int smc_init (void); 156 157 /* 158 * This is called by unregister_netdev(). It is responsible for 159 * cleaning up before the driver is finally unregistered and discarded. 160 */ 161 void smc_destructor (void); 162 163 /* 164 * The kernel calls this function when someone wants to use the device, 165 * typically 'ifconfig ethX up'. 166 */ 167 static int smc_open (bd_t *bd); 168 169 170 /* 171 * This is called by the kernel in response to 'ifconfig ethX down'. It 172 * is responsible for cleaning up everything that the open routine 173 * does, and maybe putting the card into a powerdown state. 174 */ 175 static int smc_close (void); 176 177 /* 178 * This is a separate procedure to handle the receipt of a packet, to 179 * leave the interrupt code looking slightly cleaner 180 */ 181 static int smc_rcv (void); 182 183 /* See if a MAC address is defined in the current environment. If so use it. If not 184 . print a warning and set the environment and other globals with the default. 185 . If an EEPROM is present it really should be consulted. 186 */ 187 int smc_get_ethaddr(bd_t *bd); 188 int get_rom_mac(unsigned char *v_rom_mac); 189 190 /* ------------------------------------------------------------ 191 * Internal routines 192 * ------------------------------------------------------------ 193 */ 194 195 static unsigned char smc_mac_addr[] = { 0xc0, 0x00, 0x00, 0x1b, 0x62, 0x9c }; 196 197 /* 198 * This function must be called before smc_open() if you want to override 199 * the default mac address. 200 */ 201 202 void smc_set_mac_addr (const unsigned char *addr) 203 { 204 int i; 205 206 for (i = 0; i < sizeof (smc_mac_addr); i++) { 207 smc_mac_addr[i] = addr[i]; 208 } 209 } 210 211 /* 212 * smc_get_macaddr is no longer used. If you want to override the default 213 * mac address, call smc_get_mac_addr as a part of the board initialisation. 214 */ 215 216 #if 0 217 void smc_get_macaddr (byte * addr) 218 { 219 /* MAC ADDRESS AT FLASHBLOCK 1 / OFFSET 0x10 */ 220 unsigned char *dnp1110_mac = (unsigned char *) (0xE8000000 + 0x20010); 221 int i; 222 223 224 for (i = 0; i < 6; i++) { 225 addr[0] = *(dnp1110_mac + 0); 226 addr[1] = *(dnp1110_mac + 1); 227 addr[2] = *(dnp1110_mac + 2); 228 addr[3] = *(dnp1110_mac + 3); 229 addr[4] = *(dnp1110_mac + 4); 230 addr[5] = *(dnp1110_mac + 5); 231 } 232 } 233 #endif /* 0 */ 234 235 /*********************************************** 236 * Show available memory * 237 ***********************************************/ 238 void dump_memory_info (void) 239 { 240 word mem_info; 241 word old_bank; 242 243 old_bank = SMC_inw (LAN91C96_BANK_SELECT) & 0xF; 244 245 SMC_SELECT_BANK (0); 246 mem_info = SMC_inw (LAN91C96_MIR); 247 PRINTK2 ("Memory: %4d available\n", (mem_info >> 8) * 2048); 248 249 SMC_SELECT_BANK (old_bank); 250 } 251 252 /* 253 * A rather simple routine to print out a packet for debugging purposes. 254 */ 255 #if SMC_DEBUG > 2 256 static void print_packet (byte *, int); 257 #endif 258 259 /* #define tx_done(dev) 1 */ 260 261 262 /* this does a soft reset on the device */ 263 static void smc_reset (void); 264 265 /* Enable Interrupts, Receive, and Transmit */ 266 static void smc_enable (void); 267 268 /* this puts the device in an inactive state */ 269 static void smc_shutdown (void); 270 271 272 static int poll4int (byte mask, int timeout) 273 { 274 int tmo = get_timer (0) + timeout * CFG_HZ; 275 int is_timeout = 0; 276 word old_bank = SMC_inw (LAN91C96_BANK_SELECT); 277 278 PRINTK2 ("Polling...\n"); 279 SMC_SELECT_BANK (2); 280 while ((SMC_inw (LAN91C96_INT_STATS) & mask) == 0) { 281 if (get_timer (0) >= tmo) { 282 is_timeout = 1; 283 break; 284 } 285 } 286 287 /* restore old bank selection */ 288 SMC_SELECT_BANK (old_bank); 289 290 if (is_timeout) 291 return 1; 292 else 293 return 0; 294 } 295 296 /* 297 * Function: smc_reset( void ) 298 * Purpose: 299 * This sets the SMC91111 chip to its normal state, hopefully from whatever 300 * mess that any other DOS driver has put it in. 301 * 302 * Maybe I should reset more registers to defaults in here? SOFTRST should 303 * do that for me. 304 * 305 * Method: 306 * 1. send a SOFT RESET 307 * 2. wait for it to finish 308 * 3. enable autorelease mode 309 * 4. reset the memory management unit 310 * 5. clear all interrupts 311 * 312 */ 313 static void smc_reset (void) 314 { 315 PRINTK2 ("%s:smc_reset\n", SMC_DEV_NAME); 316 317 /* This resets the registers mostly to defaults, but doesn't 318 affect EEPROM. That seems unnecessary */ 319 SMC_SELECT_BANK (0); 320 SMC_outw (LAN91C96_RCR_SOFT_RST, LAN91C96_RCR); 321 322 udelay (10); 323 324 /* Disable transmit and receive functionality */ 325 SMC_outw (0, LAN91C96_RCR); 326 SMC_outw (0, LAN91C96_TCR); 327 328 /* set the control register */ 329 SMC_SELECT_BANK (1); 330 SMC_outw (SMC_inw (LAN91C96_CONTROL) | LAN91C96_CTR_BIT_8, 331 LAN91C96_CONTROL); 332 333 /* Disable all interrupts */ 334 SMC_outb (0, LAN91C96_INT_MASK); 335 } 336 337 /* 338 * Function: smc_enable 339 * Purpose: let the chip talk to the outside work 340 * Method: 341 * 1. Initialize the Memory Configuration Register 342 * 2. Enable the transmitter 343 * 3. Enable the receiver 344 */ 345 static void smc_enable () 346 { 347 PRINTK2 ("%s:smc_enable\n", SMC_DEV_NAME); 348 SMC_SELECT_BANK (0); 349 350 /* Initialize the Memory Configuration Register. See page 351 49 of the LAN91C96 data sheet for details. */ 352 SMC_outw (LAN91C96_MCR_TRANSMIT_PAGES, LAN91C96_MCR); 353 354 /* Initialize the Transmit Control Register */ 355 SMC_outw (LAN91C96_TCR_TXENA, LAN91C96_TCR); 356 /* Initialize the Receive Control Register 357 * FIXME: 358 * The promiscuous bit set because I could not receive ARP reply 359 * packets from the server when I send a ARP request. It only works 360 * when I set the promiscuous bit 361 */ 362 SMC_outw (LAN91C96_RCR_RXEN | LAN91C96_RCR_PRMS, LAN91C96_RCR); 363 } 364 365 /* 366 * Function: smc_shutdown 367 * Purpose: closes down the SMC91xxx chip. 368 * Method: 369 * 1. zero the interrupt mask 370 * 2. clear the enable receive flag 371 * 3. clear the enable xmit flags 372 * 373 * TODO: 374 * (1) maybe utilize power down mode. 375 * Why not yet? Because while the chip will go into power down mode, 376 * the manual says that it will wake up in response to any I/O requests 377 * in the register space. Empirical results do not show this working. 378 */ 379 static void smc_shutdown () 380 { 381 PRINTK2 (CARDNAME ":smc_shutdown\n"); 382 383 /* no more interrupts for me */ 384 SMC_SELECT_BANK (2); 385 SMC_outb (0, LAN91C96_INT_MASK); 386 387 /* and tell the card to stay away from that nasty outside world */ 388 SMC_SELECT_BANK (0); 389 SMC_outb (0, LAN91C96_RCR); 390 SMC_outb (0, LAN91C96_TCR); 391 } 392 393 394 /* 395 * Function: smc_hardware_send_packet(struct net_device * ) 396 * Purpose: 397 * This sends the actual packet to the SMC9xxx chip. 398 * 399 * Algorithm: 400 * First, see if a saved_skb is available. 401 * ( this should NOT be called if there is no 'saved_skb' 402 * Now, find the packet number that the chip allocated 403 * Point the data pointers at it in memory 404 * Set the length word in the chip's memory 405 * Dump the packet to chip memory 406 * Check if a last byte is needed ( odd length packet ) 407 * if so, set the control flag right 408 * Tell the card to send it 409 * Enable the transmit interrupt, so I know if it failed 410 * Free the kernel data if I actually sent it. 411 */ 412 static int smc_send_packet (volatile void *packet, int packet_length) 413 { 414 byte packet_no; 415 unsigned long ioaddr; 416 byte *buf; 417 int length; 418 int numPages; 419 int try = 0; 420 int time_out; 421 byte status; 422 423 424 PRINTK3 ("%s:smc_hardware_send_packet\n", SMC_DEV_NAME); 425 426 length = ETH_ZLEN < packet_length ? packet_length : ETH_ZLEN; 427 428 /* allocate memory 429 ** The MMU wants the number of pages to be the number of 256 bytes 430 ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) ) 431 ** 432 ** The 91C111 ignores the size bits, but the code is left intact 433 ** for backwards and future compatibility. 434 ** 435 ** Pkt size for allocating is data length +6 (for additional status 436 ** words, length and ctl!) 437 ** 438 ** If odd size then last byte is included in this header. 439 */ 440 numPages = ((length & 0xfffe) + 6); 441 numPages >>= 8; /* Divide by 256 */ 442 443 if (numPages > 7) { 444 printf ("%s: Far too big packet error. \n", SMC_DEV_NAME); 445 return 0; 446 } 447 448 /* now, try to allocate the memory */ 449 450 SMC_SELECT_BANK (2); 451 SMC_outw (LAN91C96_MMUCR_ALLOC_TX | numPages, LAN91C96_MMU); 452 453 again: 454 try++; 455 time_out = MEMORY_WAIT_TIME; 456 do { 457 status = SMC_inb (LAN91C96_INT_STATS); 458 if (status & LAN91C96_IST_ALLOC_INT) { 459 460 SMC_outb (LAN91C96_IST_ALLOC_INT, LAN91C96_INT_STATS); 461 break; 462 } 463 } while (--time_out); 464 465 if (!time_out) { 466 PRINTK2 ("%s: memory allocation, try %d failed ...\n", 467 SMC_DEV_NAME, try); 468 if (try < SMC_ALLOC_MAX_TRY) 469 goto again; 470 else 471 return 0; 472 } 473 474 PRINTK2 ("%s: memory allocation, try %d succeeded ...\n", 475 SMC_DEV_NAME, try); 476 477 /* I can send the packet now.. */ 478 479 ioaddr = SMC_BASE_ADDRESS; 480 481 buf = (byte *) packet; 482 483 /* If I get here, I _know_ there is a packet slot waiting for me */ 484 packet_no = SMC_inb (LAN91C96_ARR); 485 if (packet_no & LAN91C96_ARR_FAILED) { 486 /* or isn't there? BAD CHIP! */ 487 printf ("%s: Memory allocation failed. \n", SMC_DEV_NAME); 488 return 0; 489 } 490 491 /* we have a packet address, so tell the card to use it */ 492 SMC_outb (packet_no, LAN91C96_PNR); 493 494 /* point to the beginning of the packet */ 495 SMC_outw (LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER); 496 497 PRINTK3 ("%s: Trying to xmit packet of length %x\n", 498 SMC_DEV_NAME, length); 499 500 #if SMC_DEBUG > 2 501 printf ("Transmitting Packet\n"); 502 print_packet (buf, length); 503 #endif 504 505 /* send the packet length ( +6 for status, length and ctl byte ) 506 and the status word ( set to zeros ) */ 507 #ifdef USE_32_BIT 508 SMC_outl ((length + 6) << 16, LAN91C96_DATA_HIGH); 509 #else 510 SMC_outw (0, LAN91C96_DATA_HIGH); 511 /* send the packet length ( +6 for status words, length, and ctl */ 512 SMC_outw ((length + 6), LAN91C96_DATA_HIGH); 513 #endif /* USE_32_BIT */ 514 515 /* send the actual data 516 * I _think_ it's faster to send the longs first, and then 517 * mop up by sending the last word. It depends heavily 518 * on alignment, at least on the 486. Maybe it would be 519 * a good idea to check which is optimal? But that could take 520 * almost as much time as is saved? 521 */ 522 #ifdef USE_32_BIT 523 SMC_outsl (LAN91C96_DATA_HIGH, buf, length >> 2); 524 if (length & 0x2) 525 SMC_outw (*((word *) (buf + (length & 0xFFFFFFFC))), 526 LAN91C96_DATA_HIGH); 527 #else 528 SMC_outsw (LAN91C96_DATA_HIGH, buf, (length) >> 1); 529 #endif /* USE_32_BIT */ 530 531 /* Send the last byte, if there is one. */ 532 if ((length & 1) == 0) { 533 SMC_outw (0, LAN91C96_DATA_HIGH); 534 } else { 535 SMC_outw (buf[length - 1] | 0x2000, LAN91C96_DATA_HIGH); 536 } 537 538 /* and let the chipset deal with it */ 539 SMC_outw (LAN91C96_MMUCR_ENQUEUE, LAN91C96_MMU); 540 541 /* poll for TX INT */ 542 if (poll4int (LAN91C96_MSK_TX_INT, SMC_TX_TIMEOUT)) { 543 /* sending failed */ 544 PRINTK2 ("%s: TX timeout, sending failed...\n", SMC_DEV_NAME); 545 546 /* release packet */ 547 SMC_outw (LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU); 548 549 /* wait for MMU getting ready (low) */ 550 while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) { 551 udelay (10); 552 } 553 554 PRINTK2 ("MMU ready\n"); 555 556 557 return 0; 558 } else { 559 /* ack. int */ 560 SMC_outw (LAN91C96_IST_TX_INT, LAN91C96_INT_STATS); 561 562 PRINTK2 ("%s: Sent packet of length %d \n", SMC_DEV_NAME, length); 563 564 /* release packet */ 565 SMC_outw (LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU); 566 567 /* wait for MMU getting ready (low) */ 568 while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) { 569 udelay (10); 570 } 571 572 PRINTK2 ("MMU ready\n"); 573 } 574 575 return length; 576 } 577 578 /*------------------------------------------------------------------------- 579 * smc_destructor( struct net_device * dev ) 580 * Input parameters: 581 * dev, pointer to the device structure 582 * 583 * Output: 584 * None. 585 *-------------------------------------------------------------------------- 586 */ 587 void smc_destructor () 588 { 589 PRINTK2 (CARDNAME ":smc_destructor\n"); 590 } 591 592 593 /* 594 * Open and Initialize the board 595 * 596 * Set up everything, reset the card, etc .. 597 * 598 */ 599 static int smc_open (bd_t *bd) 600 { 601 int i, err; /* used to set hw ethernet address */ 602 603 PRINTK2 ("%s:smc_open\n", SMC_DEV_NAME); 604 605 /* reset the hardware */ 606 607 smc_reset (); 608 smc_enable (); 609 610 SMC_SELECT_BANK (1); 611 612 err = smc_get_ethaddr (bd); /* set smc_mac_addr, and sync it with u-boot globals */ 613 if (err < 0) { 614 memset (bd->bi_enetaddr, 0, 6); /* hack to make error stick! upper code will abort if not set */ 615 return (-1); /* upper code ignores this, but NOT bi_enetaddr */ 616 } 617 #ifdef USE_32_BIT 618 for (i = 0; i < 6; i += 2) { 619 word address; 620 621 address = smc_mac_addr[i + 1] << 8; 622 address |= smc_mac_addr[i]; 623 SMC_outw (address, LAN91C96_IA0 + i); 624 } 625 #else 626 for (i = 0; i < 6; i++) 627 SMC_outb (smc_mac_addr[i], LAN91C96_IA0 + i); 628 #endif 629 return 0; 630 } 631 632 /*------------------------------------------------------------- 633 * 634 * smc_rcv - receive a packet from the card 635 * 636 * There is ( at least ) a packet waiting to be read from 637 * chip-memory. 638 * 639 * o Read the status 640 * o If an error, record it 641 * o otherwise, read in the packet 642 *------------------------------------------------------------- 643 */ 644 static int smc_rcv () 645 { 646 int packet_number; 647 word status; 648 word packet_length; 649 int is_error = 0; 650 651 #ifdef USE_32_BIT 652 dword stat_len; 653 #endif 654 655 656 SMC_SELECT_BANK (2); 657 packet_number = SMC_inw (LAN91C96_FIFO); 658 659 if (packet_number & LAN91C96_FIFO_RXEMPTY) { 660 return 0; 661 } 662 663 PRINTK3 ("%s:smc_rcv\n", SMC_DEV_NAME); 664 /* start reading from the start of the packet */ 665 SMC_outw (LAN91C96_PTR_READ | LAN91C96_PTR_RCV | 666 LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER); 667 668 /* First two words are status and packet_length */ 669 #ifdef USE_32_BIT 670 stat_len = SMC_inl (LAN91C96_DATA_HIGH); 671 status = stat_len & 0xffff; 672 packet_length = stat_len >> 16; 673 #else 674 status = SMC_inw (LAN91C96_DATA_HIGH); 675 packet_length = SMC_inw (LAN91C96_DATA_HIGH); 676 #endif 677 678 packet_length &= 0x07ff; /* mask off top bits */ 679 680 PRINTK2 ("RCV: STATUS %4x LENGTH %4x\n", status, packet_length); 681 682 if (!(status & FRAME_FILTER)) { 683 /* Adjust for having already read the first two words */ 684 packet_length -= 4; /*4; */ 685 686 687 /* set odd length for bug in LAN91C111, */ 688 /* which never sets RS_ODDFRAME */ 689 /* TODO ? */ 690 691 692 #ifdef USE_32_BIT 693 PRINTK3 (" Reading %d dwords (and %d bytes) \n", 694 packet_length >> 2, packet_length & 3); 695 /* QUESTION: Like in the TX routine, do I want 696 to send the DWORDs or the bytes first, or some 697 mixture. A mixture might improve already slow PIO 698 performance */ 699 SMC_insl (LAN91C96_DATA_HIGH, NetRxPackets[0], packet_length >> 2); 700 /* read the left over bytes */ 701 if (packet_length & 3) { 702 int i; 703 704 byte *tail = (byte *) (NetRxPackets[0] + (packet_length & ~3)); 705 dword leftover = SMC_inl (LAN91C96_DATA_HIGH); 706 707 for (i = 0; i < (packet_length & 3); i++) 708 *tail++ = (byte) (leftover >> (8 * i)) & 0xff; 709 } 710 #else 711 PRINTK3 (" Reading %d words and %d byte(s) \n", 712 (packet_length >> 1), packet_length & 1); 713 SMC_insw (LAN91C96_DATA_HIGH, NetRxPackets[0], packet_length >> 1); 714 715 #endif /* USE_32_BIT */ 716 717 #if SMC_DEBUG > 2 718 printf ("Receiving Packet\n"); 719 print_packet (NetRxPackets[0], packet_length); 720 #endif 721 } else { 722 /* error ... */ 723 /* TODO ? */ 724 is_error = 1; 725 } 726 727 while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) 728 udelay (1); /* Wait until not busy */ 729 730 /* error or good, tell the card to get rid of this packet */ 731 SMC_outw (LAN91C96_MMUCR_RELEASE_RX, LAN91C96_MMU); 732 733 while (SMC_inw (LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) 734 udelay (1); /* Wait until not busy */ 735 736 if (!is_error) { 737 /* Pass the packet up to the protocol layers. */ 738 NetReceive (NetRxPackets[0], packet_length); 739 return packet_length; 740 } else { 741 return 0; 742 } 743 744 } 745 746 /*---------------------------------------------------- 747 * smc_close 748 * 749 * this makes the board clean up everything that it can 750 * and not talk to the outside world. Caused by 751 * an 'ifconfig ethX down' 752 * 753 -----------------------------------------------------*/ 754 static int smc_close () 755 { 756 PRINTK2 ("%s:smc_close\n", SMC_DEV_NAME); 757 758 /* clear everything */ 759 smc_shutdown (); 760 761 return 0; 762 } 763 764 #if SMC_DEBUG > 2 765 static void print_packet (byte * buf, int length) 766 { 767 #if 0 768 int i; 769 int remainder; 770 int lines; 771 772 printf ("Packet of length %d \n", length); 773 774 lines = length / 16; 775 remainder = length % 16; 776 777 for (i = 0; i < lines; i++) { 778 int cur; 779 780 for (cur = 0; cur < 8; cur++) { 781 byte a, b; 782 783 a = *(buf++); 784 b = *(buf++); 785 printf ("%02x%02x ", a, b); 786 } 787 printf ("\n"); 788 } 789 for (i = 0; i < remainder / 2; i++) { 790 byte a, b; 791 792 a = *(buf++); 793 b = *(buf++); 794 printf ("%02x%02x ", a, b); 795 } 796 printf ("\n"); 797 #endif /* 0 */ 798 } 799 #endif /* SMC_DEBUG > 2 */ 800 801 int eth_init (bd_t * bd) 802 { 803 return (smc_open(bd)); 804 } 805 806 void eth_halt () 807 { 808 smc_close (); 809 } 810 811 int eth_rx () 812 { 813 return smc_rcv (); 814 } 815 816 int eth_send (volatile void *packet, int length) 817 { 818 return smc_send_packet (packet, length); 819 } 820 821 822 #if 0 823 /*------------------------------------------------------------------------- 824 * smc_hw_init() 825 * 826 * Function: 827 * Reset and enable the device, check if the I/O space location 828 * is correct 829 * 830 * Input parameters: 831 * None 832 * 833 * Output: 834 * 0 --> success 835 * 1 --> error 836 *-------------------------------------------------------------------------- 837 */ 838 static int smc_hw_init () 839 { 840 unsigned short status_test; 841 842 /* The attribute register of the LAN91C96 is located at address 843 0x0e000000 on the lubbock platform */ 844 volatile unsigned *attaddr = (unsigned *) (0x0e000000); 845 846 /* first reset, then enable the device. Sequence is critical */ 847 attaddr[LAN91C96_ECOR] |= LAN91C96_ECOR_SRESET; 848 udelay (100); 849 attaddr[LAN91C96_ECOR] &= ~LAN91C96_ECOR_SRESET; 850 attaddr[LAN91C96_ECOR] |= LAN91C96_ECOR_ENABLE; 851 852 /* force 16-bit mode */ 853 attaddr[LAN91C96_ECSR] &= ~LAN91C96_ECSR_IOIS8; 854 udelay (100); 855 856 /* check if the I/O address is correct, the upper byte of the 857 bank select register should read 0x33 */ 858 859 status_test = SMC_inw (LAN91C96_BANK_SELECT); 860 if ((status_test & 0xFF00) != 0x3300) { 861 printf ("Failed to initialize ethernetchip\n"); 862 return 1; 863 } 864 return 0; 865 } 866 #endif /* 0 */ 867 868 #endif /* CONFIG_CMD_NET */ 869 870 871 /* smc_get_ethaddr (bd_t * bd) 872 * 873 * This checks both the environment and the ROM for an ethernet address. If 874 * found, the environment takes precedence. 875 */ 876 877 int smc_get_ethaddr (bd_t * bd) 878 { 879 int env_size = 0; 880 int rom_valid = 0; 881 int env_present = 0; 882 int reg = 0; 883 char *s = NULL; 884 char *e = NULL; 885 char *v_mac, es[] = "11:22:33:44:55:66"; 886 char s_env_mac[64]; 887 uchar v_env_mac[6]; 888 uchar v_rom_mac[6]; 889 890 env_size = getenv_r ("ethaddr", s_env_mac, sizeof (s_env_mac)); 891 if (env_size != sizeof(es)) { /* Ignore if env is bad or not set */ 892 printf ("\n*** Warning: ethaddr is not set properly, ignoring!!\n"); 893 } else { 894 env_present = 1; 895 s = s_env_mac; 896 897 for (reg = 0; reg < 6; ++reg) { /* turn string into mac value */ 898 v_env_mac[reg] = s ? simple_strtoul (s, &e, 16) : 0; 899 if (s) 900 s = (*e) ? e + 1 : e; 901 } 902 } 903 904 rom_valid = get_rom_mac (v_rom_mac); /* get ROM mac value if any */ 905 906 if (!env_present) { /* if NO env */ 907 if (rom_valid) { /* but ROM is valid */ 908 v_mac = (char *)v_rom_mac; 909 sprintf (s_env_mac, "%02X:%02X:%02X:%02X:%02X:%02X", 910 v_mac[0], v_mac[1], v_mac[2], v_mac[3], 911 v_mac[4], v_mac[5]); 912 setenv ("ethaddr", s_env_mac); 913 } else { /* no env, bad ROM */ 914 printf ("\n*** ERROR: ethaddr is NOT set !!\n"); 915 return (-1); 916 } 917 } else { /* good env, don't care ROM */ 918 v_mac = (char *)v_env_mac; /* always use a good env over a ROM */ 919 } 920 921 if (env_present && rom_valid) { /* if both env and ROM are good */ 922 if (memcmp (v_env_mac, v_rom_mac, 6) != 0) { 923 printf ("\nWarning: MAC addresses don't match:\n"); 924 printf ("\tHW MAC address: " 925 "%02X:%02X:%02X:%02X:%02X:%02X\n", 926 v_rom_mac[0], v_rom_mac[1], 927 v_rom_mac[2], v_rom_mac[3], 928 v_rom_mac[4], v_rom_mac[5] ); 929 printf ("\t\"ethaddr\" value: " 930 "%02X:%02X:%02X:%02X:%02X:%02X\n", 931 v_env_mac[0], v_env_mac[1], 932 v_env_mac[2], v_env_mac[3], 933 v_env_mac[4], v_env_mac[5]) ; 934 debug ("### Set MAC addr from environment\n"); 935 } 936 } 937 memcpy (bd->bi_enetaddr, v_mac, 6); /* update global address to match env (allows env changing) */ 938 smc_set_mac_addr ((unsigned char *)v_mac); /* use old function to update smc default */ 939 PRINTK("Using MAC Address %02X:%02X:%02X:%02X:%02X:%02X\n", v_mac[0], v_mac[1], 940 v_mac[2], v_mac[3], v_mac[4], v_mac[5]); 941 return (0); 942 } 943 944 /* 945 * get_rom_mac() 946 * Note, this has omly been tested for the OMAP730 P2. 947 */ 948 949 int get_rom_mac (unsigned char *v_rom_mac) 950 { 951 #ifdef HARDCODE_MAC /* used for testing or to supress run time warnings */ 952 char hw_mac_addr[] = { 0x02, 0x80, 0xad, 0x20, 0x31, 0xb8 }; 953 954 memcpy (v_rom_mac, hw_mac_addr, 6); 955 return (1); 956 #else 957 int i; 958 SMC_SELECT_BANK (1); 959 for (i=0; i<6; i++) 960 { 961 v_rom_mac[i] = SMC_inb (LAN91C96_IA0 + i); 962 } 963 return (1); 964 #endif 965 } 966 967 #endif /* CONFIG_DRIVER_LAN91C96 */ 968