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 <malloc.h> 64 #include "lan91c96.h" 65 #include <net.h> 66 67 /*------------------------------------------------------------------------ 68 * 69 * Configuration options, for the experienced user to change. 70 * 71 -------------------------------------------------------------------------*/ 72 73 /* Use power-down feature of the chip */ 74 #define POWER_DOWN 0 75 76 /* 77 * Wait time for memory to be free. This probably shouldn't be 78 * tuned that much, as waiting for this means nothing else happens 79 * in the system 80 */ 81 #define MEMORY_WAIT_TIME 16 82 83 #define SMC_DEBUG 0 84 85 #if (SMC_DEBUG > 2 ) 86 #define PRINTK3(args...) printf(args) 87 #else 88 #define PRINTK3(args...) 89 #endif 90 91 #if SMC_DEBUG > 1 92 #define PRINTK2(args...) printf(args) 93 #else 94 #define PRINTK2(args...) 95 #endif 96 97 #ifdef SMC_DEBUG 98 #define PRINTK(args...) printf(args) 99 #else 100 #define PRINTK(args...) 101 #endif 102 103 104 /*------------------------------------------------------------------------ 105 * 106 * The internal workings of the driver. If you are changing anything 107 * here with the SMC stuff, you should have the datasheet and know 108 * what you are doing. 109 * 110 *------------------------------------------------------------------------ 111 */ 112 #define DRIVER_NAME "LAN91C96" 113 #define SMC_ALLOC_MAX_TRY 5 114 #define SMC_TX_TIMEOUT 30 115 116 #define ETH_ZLEN 60 117 118 #ifdef CONFIG_LAN91C96_USE_32_BIT 119 #define USE_32_BIT 1 120 #else 121 #undef USE_32_BIT 122 #endif 123 124 /* See if a MAC address is defined in the current environment. If so use it. If not 125 . print a warning and set the environment and other globals with the default. 126 . If an EEPROM is present it really should be consulted. 127 */ 128 static int smc_get_ethaddr(bd_t *bd, struct eth_device *dev); 129 static int get_rom_mac(struct eth_device *dev, unsigned char *v_rom_mac); 130 131 /* ------------------------------------------------------------ 132 * Internal routines 133 * ------------------------------------------------------------ 134 */ 135 136 static unsigned char smc_mac_addr[] = { 0xc0, 0x00, 0x00, 0x1b, 0x62, 0x9c }; 137 138 /* 139 * This function must be called before smc_open() if you want to override 140 * the default mac address. 141 */ 142 143 static void smc_set_mac_addr(const unsigned char *addr) 144 { 145 int i; 146 147 for (i = 0; i < sizeof (smc_mac_addr); i++) { 148 smc_mac_addr[i] = addr[i]; 149 } 150 } 151 152 /*********************************************** 153 * Show available memory * 154 ***********************************************/ 155 void dump_memory_info(struct eth_device *dev) 156 { 157 word mem_info; 158 word old_bank; 159 160 old_bank = SMC_inw(dev, LAN91C96_BANK_SELECT) & 0xF; 161 162 SMC_SELECT_BANK(dev, 0); 163 mem_info = SMC_inw(dev, LAN91C96_MIR); 164 PRINTK2 ("Memory: %4d available\n", (mem_info >> 8) * 2048); 165 166 SMC_SELECT_BANK(dev, old_bank); 167 } 168 169 /* 170 * A rather simple routine to print out a packet for debugging purposes. 171 */ 172 #if SMC_DEBUG > 2 173 static void print_packet (byte *, int); 174 #endif 175 176 static int poll4int (struct eth_device *dev, byte mask, int timeout) 177 { 178 int tmo = get_timer (0) + timeout * CONFIG_SYS_HZ; 179 int is_timeout = 0; 180 word old_bank = SMC_inw(dev, LAN91C96_BANK_SELECT); 181 182 PRINTK2 ("Polling...\n"); 183 SMC_SELECT_BANK(dev, 2); 184 while ((SMC_inw(dev, LAN91C96_INT_STATS) & mask) == 0) { 185 if (get_timer (0) >= tmo) { 186 is_timeout = 1; 187 break; 188 } 189 } 190 191 /* restore old bank selection */ 192 SMC_SELECT_BANK(dev, old_bank); 193 194 if (is_timeout) 195 return 1; 196 else 197 return 0; 198 } 199 200 /* 201 * Function: smc_reset 202 * Purpose: 203 * This sets the SMC91111 chip to its normal state, hopefully from whatever 204 * mess that any other DOS driver has put it in. 205 * 206 * Maybe I should reset more registers to defaults in here? SOFTRST should 207 * do that for me. 208 * 209 * Method: 210 * 1. send a SOFT RESET 211 * 2. wait for it to finish 212 * 3. enable autorelease mode 213 * 4. reset the memory management unit 214 * 5. clear all interrupts 215 * 216 */ 217 static void smc_reset(struct eth_device *dev) 218 { 219 PRINTK2("%s:smc_reset\n", dev->name); 220 221 /* This resets the registers mostly to defaults, but doesn't 222 affect EEPROM. That seems unnecessary */ 223 SMC_SELECT_BANK(dev, 0); 224 SMC_outw(dev, LAN91C96_RCR_SOFT_RST, LAN91C96_RCR); 225 226 udelay (10); 227 228 /* Disable transmit and receive functionality */ 229 SMC_outw(dev, 0, LAN91C96_RCR); 230 SMC_outw(dev, 0, LAN91C96_TCR); 231 232 /* set the control register */ 233 SMC_SELECT_BANK(dev, 1); 234 SMC_outw(dev, SMC_inw(dev, LAN91C96_CONTROL) | LAN91C96_CTR_BIT_8, 235 LAN91C96_CONTROL); 236 237 /* Disable all interrupts */ 238 SMC_outb(dev, 0, LAN91C96_INT_MASK); 239 } 240 241 /* 242 * Function: smc_enable 243 * Purpose: let the chip talk to the outside work 244 * Method: 245 * 1. Initialize the Memory Configuration Register 246 * 2. Enable the transmitter 247 * 3. Enable the receiver 248 */ 249 static void smc_enable(struct eth_device *dev) 250 { 251 PRINTK2("%s:smc_enable\n", dev->name); 252 SMC_SELECT_BANK(dev, 0); 253 254 /* Initialize the Memory Configuration Register. See page 255 49 of the LAN91C96 data sheet for details. */ 256 SMC_outw(dev, LAN91C96_MCR_TRANSMIT_PAGES, LAN91C96_MCR); 257 258 /* Initialize the Transmit Control Register */ 259 SMC_outw(dev, LAN91C96_TCR_TXENA, LAN91C96_TCR); 260 /* Initialize the Receive Control Register 261 * FIXME: 262 * The promiscuous bit set because I could not receive ARP reply 263 * packets from the server when I send a ARP request. It only works 264 * when I set the promiscuous bit 265 */ 266 SMC_outw(dev, LAN91C96_RCR_RXEN | LAN91C96_RCR_PRMS, LAN91C96_RCR); 267 } 268 269 /* 270 * Function: smc_shutdown 271 * Purpose: closes down the SMC91xxx chip. 272 * Method: 273 * 1. zero the interrupt mask 274 * 2. clear the enable receive flag 275 * 3. clear the enable xmit flags 276 * 277 * TODO: 278 * (1) maybe utilize power down mode. 279 * Why not yet? Because while the chip will go into power down mode, 280 * the manual says that it will wake up in response to any I/O requests 281 * in the register space. Empirical results do not show this working. 282 */ 283 static void smc_shutdown(struct eth_device *dev) 284 { 285 PRINTK2("%s:smc_shutdown\n", dev->name); 286 287 /* no more interrupts for me */ 288 SMC_SELECT_BANK(dev, 2); 289 SMC_outb(dev, 0, LAN91C96_INT_MASK); 290 291 /* and tell the card to stay away from that nasty outside world */ 292 SMC_SELECT_BANK(dev, 0); 293 SMC_outb(dev, 0, LAN91C96_RCR); 294 SMC_outb(dev, 0, LAN91C96_TCR); 295 } 296 297 298 /* 299 * Function: smc_hardware_send_packet(struct net_device * ) 300 * Purpose: 301 * This sends the actual packet to the SMC9xxx chip. 302 * 303 * Algorithm: 304 * First, see if a saved_skb is available. 305 * ( this should NOT be called if there is no 'saved_skb' 306 * Now, find the packet number that the chip allocated 307 * Point the data pointers at it in memory 308 * Set the length word in the chip's memory 309 * Dump the packet to chip memory 310 * Check if a last byte is needed ( odd length packet ) 311 * if so, set the control flag right 312 * Tell the card to send it 313 * Enable the transmit interrupt, so I know if it failed 314 * Free the kernel data if I actually sent it. 315 */ 316 static int smc_send_packet(struct eth_device *dev, volatile void *packet, 317 int packet_length) 318 { 319 byte packet_no; 320 unsigned long ioaddr; 321 byte *buf; 322 int length; 323 int numPages; 324 int try = 0; 325 int time_out; 326 byte status; 327 328 329 PRINTK3("%s:smc_hardware_send_packet\n", dev->name); 330 331 length = ETH_ZLEN < packet_length ? packet_length : ETH_ZLEN; 332 333 /* allocate memory 334 ** The MMU wants the number of pages to be the number of 256 bytes 335 ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) ) 336 ** 337 ** The 91C111 ignores the size bits, but the code is left intact 338 ** for backwards and future compatibility. 339 ** 340 ** Pkt size for allocating is data length +6 (for additional status 341 ** words, length and ctl!) 342 ** 343 ** If odd size then last byte is included in this header. 344 */ 345 numPages = ((length & 0xfffe) + 6); 346 numPages >>= 8; /* Divide by 256 */ 347 348 if (numPages > 7) { 349 printf("%s: Far too big packet error. \n", dev->name); 350 return 0; 351 } 352 353 /* now, try to allocate the memory */ 354 355 SMC_SELECT_BANK(dev, 2); 356 SMC_outw(dev, LAN91C96_MMUCR_ALLOC_TX | numPages, LAN91C96_MMU); 357 358 again: 359 try++; 360 time_out = MEMORY_WAIT_TIME; 361 do { 362 status = SMC_inb(dev, LAN91C96_INT_STATS); 363 if (status & LAN91C96_IST_ALLOC_INT) { 364 365 SMC_outb(dev, LAN91C96_IST_ALLOC_INT, 366 LAN91C96_INT_STATS); 367 break; 368 } 369 } while (--time_out); 370 371 if (!time_out) { 372 PRINTK2 ("%s: memory allocation, try %d failed ...\n", 373 dev->name, try); 374 if (try < SMC_ALLOC_MAX_TRY) 375 goto again; 376 else 377 return 0; 378 } 379 380 PRINTK2 ("%s: memory allocation, try %d succeeded ...\n", 381 dev->name, try); 382 383 /* I can send the packet now.. */ 384 385 ioaddr = dev->iobase; 386 387 buf = (byte *) packet; 388 389 /* If I get here, I _know_ there is a packet slot waiting for me */ 390 packet_no = SMC_inb(dev, LAN91C96_ARR); 391 if (packet_no & LAN91C96_ARR_FAILED) { 392 /* or isn't there? BAD CHIP! */ 393 printf("%s: Memory allocation failed. \n", dev->name); 394 return 0; 395 } 396 397 /* we have a packet address, so tell the card to use it */ 398 SMC_outb(dev, packet_no, LAN91C96_PNR); 399 400 /* point to the beginning of the packet */ 401 SMC_outw(dev, LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER); 402 403 PRINTK3("%s: Trying to xmit packet of length %x\n", 404 dev->name, length); 405 406 #if SMC_DEBUG > 2 407 printf ("Transmitting Packet\n"); 408 print_packet (buf, length); 409 #endif 410 411 /* send the packet length ( +6 for status, length and ctl byte ) 412 and the status word ( set to zeros ) */ 413 #ifdef USE_32_BIT 414 SMC_outl(dev, (length + 6) << 16, LAN91C96_DATA_HIGH); 415 #else 416 SMC_outw(dev, 0, LAN91C96_DATA_HIGH); 417 /* send the packet length ( +6 for status words, length, and ctl */ 418 SMC_outw(dev, (length + 6), LAN91C96_DATA_HIGH); 419 #endif /* USE_32_BIT */ 420 421 /* send the actual data 422 * I _think_ it's faster to send the longs first, and then 423 * mop up by sending the last word. It depends heavily 424 * on alignment, at least on the 486. Maybe it would be 425 * a good idea to check which is optimal? But that could take 426 * almost as much time as is saved? 427 */ 428 #ifdef USE_32_BIT 429 SMC_outsl(dev, LAN91C96_DATA_HIGH, buf, length >> 2); 430 if (length & 0x2) 431 SMC_outw(dev, *((word *) (buf + (length & 0xFFFFFFFC))), 432 LAN91C96_DATA_HIGH); 433 #else 434 SMC_outsw(dev, LAN91C96_DATA_HIGH, buf, (length) >> 1); 435 #endif /* USE_32_BIT */ 436 437 /* Send the last byte, if there is one. */ 438 if ((length & 1) == 0) { 439 SMC_outw(dev, 0, LAN91C96_DATA_HIGH); 440 } else { 441 SMC_outw(dev, buf[length - 1] | 0x2000, LAN91C96_DATA_HIGH); 442 } 443 444 /* and let the chipset deal with it */ 445 SMC_outw(dev, LAN91C96_MMUCR_ENQUEUE, LAN91C96_MMU); 446 447 /* poll for TX INT */ 448 if (poll4int (dev, LAN91C96_MSK_TX_INT, SMC_TX_TIMEOUT)) { 449 /* sending failed */ 450 PRINTK2("%s: TX timeout, sending failed...\n", dev->name); 451 452 /* release packet */ 453 SMC_outw(dev, LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU); 454 455 /* wait for MMU getting ready (low) */ 456 while (SMC_inw(dev, LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) 457 udelay (10); 458 459 PRINTK2("MMU ready\n"); 460 461 462 return 0; 463 } else { 464 /* ack. int */ 465 SMC_outw(dev, LAN91C96_IST_TX_INT, LAN91C96_INT_STATS); 466 467 PRINTK2("%s: Sent packet of length %d \n", dev->name, length); 468 469 /* release packet */ 470 SMC_outw(dev, LAN91C96_MMUCR_RELEASE_TX, LAN91C96_MMU); 471 472 /* wait for MMU getting ready (low) */ 473 while (SMC_inw(dev, LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) 474 udelay (10); 475 476 PRINTK2 ("MMU ready\n"); 477 } 478 479 return length; 480 } 481 482 483 /* 484 * Open and Initialize the board 485 * 486 * Set up everything, reset the card, etc .. 487 * 488 */ 489 static int smc_open(bd_t *bd, struct eth_device *dev) 490 { 491 int i, err; /* used to set hw ethernet address */ 492 493 PRINTK2("%s:smc_open\n", dev->name); 494 495 /* reset the hardware */ 496 497 smc_reset(dev); 498 smc_enable(dev); 499 500 SMC_SELECT_BANK(dev, 1); 501 /* set smc_mac_addr, and sync it with u-boot globals */ 502 err = smc_get_ethaddr(bd, dev); 503 if (err < 0) 504 return -1; 505 #ifdef USE_32_BIT 506 for (i = 0; i < 6; i += 2) { 507 word address; 508 509 address = smc_mac_addr[i + 1] << 8; 510 address |= smc_mac_addr[i]; 511 SMC_outw(dev, address, LAN91C96_IA0 + i); 512 } 513 #else 514 for (i = 0; i < 6; i++) 515 SMC_outb(dev, smc_mac_addr[i], LAN91C96_IA0 + i); 516 #endif 517 return 0; 518 } 519 520 /*------------------------------------------------------------- 521 * 522 * smc_rcv - receive a packet from the card 523 * 524 * There is ( at least ) a packet waiting to be read from 525 * chip-memory. 526 * 527 * o Read the status 528 * o If an error, record it 529 * o otherwise, read in the packet 530 *------------------------------------------------------------- 531 */ 532 static int smc_rcv(struct eth_device *dev) 533 { 534 int packet_number; 535 word status; 536 word packet_length; 537 int is_error = 0; 538 539 #ifdef USE_32_BIT 540 dword stat_len; 541 #endif 542 543 544 SMC_SELECT_BANK(dev, 2); 545 packet_number = SMC_inw(dev, LAN91C96_FIFO); 546 547 if (packet_number & LAN91C96_FIFO_RXEMPTY) { 548 return 0; 549 } 550 551 PRINTK3("%s:smc_rcv\n", dev->name); 552 /* start reading from the start of the packet */ 553 SMC_outw(dev, LAN91C96_PTR_READ | LAN91C96_PTR_RCV | 554 LAN91C96_PTR_AUTO_INCR, LAN91C96_POINTER); 555 556 /* First two words are status and packet_length */ 557 #ifdef USE_32_BIT 558 stat_len = SMC_inl(dev, LAN91C96_DATA_HIGH); 559 status = stat_len & 0xffff; 560 packet_length = stat_len >> 16; 561 #else 562 status = SMC_inw(dev, LAN91C96_DATA_HIGH); 563 packet_length = SMC_inw(dev, LAN91C96_DATA_HIGH); 564 #endif 565 566 packet_length &= 0x07ff; /* mask off top bits */ 567 568 PRINTK2 ("RCV: STATUS %4x LENGTH %4x\n", status, packet_length); 569 570 if (!(status & FRAME_FILTER)) { 571 /* Adjust for having already read the first two words */ 572 packet_length -= 4; /*4; */ 573 574 575 /* set odd length for bug in LAN91C111, */ 576 /* which never sets RS_ODDFRAME */ 577 /* TODO ? */ 578 579 580 #ifdef USE_32_BIT 581 PRINTK3 (" Reading %d dwords (and %d bytes) \n", 582 packet_length >> 2, packet_length & 3); 583 /* QUESTION: Like in the TX routine, do I want 584 to send the DWORDs or the bytes first, or some 585 mixture. A mixture might improve already slow PIO 586 performance */ 587 SMC_insl(dev, LAN91C96_DATA_HIGH, NetRxPackets[0], 588 packet_length >> 2); 589 /* read the left over bytes */ 590 if (packet_length & 3) { 591 int i; 592 593 byte *tail = (byte *) (NetRxPackets[0] + (packet_length & ~3)); 594 dword leftover = SMC_inl(dev, LAN91C96_DATA_HIGH); 595 596 for (i = 0; i < (packet_length & 3); i++) 597 *tail++ = (byte) (leftover >> (8 * i)) & 0xff; 598 } 599 #else 600 PRINTK3 (" Reading %d words and %d byte(s) \n", 601 (packet_length >> 1), packet_length & 1); 602 SMC_insw(dev, LAN91C96_DATA_HIGH, NetRxPackets[0], 603 packet_length >> 1); 604 605 #endif /* USE_32_BIT */ 606 607 #if SMC_DEBUG > 2 608 printf ("Receiving Packet\n"); 609 print_packet((byte *)NetRxPackets[0], packet_length); 610 #endif 611 } else { 612 /* error ... */ 613 /* TODO ? */ 614 is_error = 1; 615 } 616 617 while (SMC_inw(dev, LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) 618 udelay (1); /* Wait until not busy */ 619 620 /* error or good, tell the card to get rid of this packet */ 621 SMC_outw(dev, LAN91C96_MMUCR_RELEASE_RX, LAN91C96_MMU); 622 623 while (SMC_inw(dev, LAN91C96_MMU) & LAN91C96_MMUCR_NO_BUSY) 624 udelay (1); /* Wait until not busy */ 625 626 if (!is_error) { 627 /* Pass the packet up to the protocol layers. */ 628 NetReceive (NetRxPackets[0], packet_length); 629 return packet_length; 630 } else { 631 return 0; 632 } 633 634 } 635 636 /*---------------------------------------------------- 637 * smc_close 638 * 639 * this makes the board clean up everything that it can 640 * and not talk to the outside world. Caused by 641 * an 'ifconfig ethX down' 642 * 643 -----------------------------------------------------*/ 644 static int smc_close(struct eth_device *dev) 645 { 646 PRINTK2("%s:smc_close\n", dev->name); 647 648 /* clear everything */ 649 smc_shutdown(dev); 650 651 return 0; 652 } 653 654 #if SMC_DEBUG > 2 655 static void print_packet(byte *buf, int length) 656 { 657 #if 0 658 int i; 659 int remainder; 660 int lines; 661 662 printf ("Packet of length %d \n", length); 663 664 lines = length / 16; 665 remainder = length % 16; 666 667 for (i = 0; i < lines; i++) { 668 int cur; 669 670 for (cur = 0; cur < 8; cur++) { 671 byte a, b; 672 673 a = *(buf++); 674 b = *(buf++); 675 printf ("%02x%02x ", a, b); 676 } 677 printf ("\n"); 678 } 679 for (i = 0; i < remainder / 2; i++) { 680 byte a, b; 681 682 a = *(buf++); 683 b = *(buf++); 684 printf ("%02x%02x ", a, b); 685 } 686 printf ("\n"); 687 #endif /* 0 */ 688 } 689 #endif /* SMC_DEBUG > 2 */ 690 691 static int lan91c96_init(struct eth_device *dev, bd_t *bd) 692 { 693 return smc_open(bd, dev); 694 } 695 696 static void lan91c96_halt(struct eth_device *dev) 697 { 698 smc_close(dev); 699 } 700 701 static int lan91c96_recv(struct eth_device *dev) 702 { 703 return smc_rcv(dev); 704 } 705 706 static int lan91c96_send(struct eth_device *dev, volatile void *packet, 707 int length) 708 { 709 return smc_send_packet(dev, packet, length); 710 } 711 712 /* smc_get_ethaddr 713 * 714 * This checks both the environment and the ROM for an ethernet address. If 715 * found, the environment takes precedence. 716 */ 717 718 static int smc_get_ethaddr(bd_t *bd, struct eth_device *dev) 719 { 720 uchar v_mac[6]; 721 722 if (!eth_getenv_enetaddr("ethaddr", v_mac)) { 723 /* get ROM mac value if any */ 724 if (!get_rom_mac(dev, v_mac)) { 725 printf("\n*** ERROR: ethaddr is NOT set !!\n"); 726 return -1; 727 } 728 eth_setenv_enetaddr("ethaddr", v_mac); 729 } 730 731 smc_set_mac_addr(v_mac); /* use old function to update smc default */ 732 PRINTK("Using MAC Address %pM\n", v_mac); 733 return 0; 734 } 735 736 /* 737 * get_rom_mac() 738 * Note, this has omly been tested for the OMAP730 P2. 739 */ 740 741 static int get_rom_mac(struct eth_device *dev, unsigned char *v_rom_mac) 742 { 743 #ifdef HARDCODE_MAC /* used for testing or to supress run time warnings */ 744 char hw_mac_addr[] = { 0x02, 0x80, 0xad, 0x20, 0x31, 0xb8 }; 745 746 memcpy (v_rom_mac, hw_mac_addr, 6); 747 return (1); 748 #else 749 int i; 750 SMC_SELECT_BANK(dev, 1); 751 for (i=0; i<6; i++) 752 { 753 v_rom_mac[i] = SMC_inb(dev, LAN91C96_IA0 + i); 754 } 755 return (1); 756 #endif 757 } 758 759 /* Structure to detect the device IDs */ 760 struct id_type { 761 u8 id; 762 char *name; 763 }; 764 static struct id_type supported_chips[] = { 765 {0, ""}, /* Dummy entry to prevent id check failure */ 766 {9, "LAN91C110"}, 767 {8, "LAN91C100FD"}, 768 {7, "LAN91C100"}, 769 {5, "LAN91C95"}, 770 {4, "LAN91C94/LAN91C96"}, 771 {3, "LAN91C90/LAN91C92"}, 772 }; 773 /* lan91c96_detect_chip 774 * See: 775 * http://www.embeddedsys.com/subpages/resources/images/documents/LAN91C96_datasheet.pdf 776 * page 71 - that is the closest we get to detect this device 777 */ 778 static int lan91c96_detect_chip(struct eth_device *dev) 779 { 780 u8 chip_id; 781 int r; 782 SMC_SELECT_BANK(dev, 3); 783 chip_id = SMC_inw(dev, 0xA) & LAN91C96_REV_REVID; 784 SMC_SELECT_BANK(dev, 0); 785 for (r = 0; r < sizeof(supported_chips) / sizeof(struct id_type); r++) 786 if (chip_id == supported_chips[r].id) 787 return r; 788 return 0; 789 } 790 791 int lan91c96_initialize(u8 dev_num, int base_addr) 792 { 793 struct eth_device *dev; 794 int r = 0; 795 796 dev = malloc(sizeof(*dev)); 797 if (!dev) { 798 return 0; 799 } 800 memset(dev, 0, sizeof(*dev)); 801 802 dev->iobase = base_addr; 803 804 /* Try to detect chip. Will fail if not present. */ 805 r = lan91c96_detect_chip(dev); 806 if (!r) { 807 free(dev); 808 return 0; 809 } 810 get_rom_mac(dev, dev->enetaddr); 811 812 dev->init = lan91c96_init; 813 dev->halt = lan91c96_halt; 814 dev->send = lan91c96_send; 815 dev->recv = lan91c96_recv; 816 sprintf(dev->name, "%s-%hu", supported_chips[r].name, dev_num); 817 818 eth_register(dev); 819 return 0; 820 } 821