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Ice Cream Sandwich
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4.0.2_r1
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external
grub
netboot
smc9000.c
/*------------------------------------------------------------------------ * smc9000.c * This is a Etherboot driver for SMC's 9000 series of Ethernet cards. * * Copyright (C) 1998 Daniel Engstrm
* Based on the Linux SMC9000 driver, smc9194.c by Eric Stahlman * Copyright (C) 1996 by Erik Stahlman
* * This software may be used and distributed according to the terms * of the GNU Public License, incorporated herein by reference. * * "Features" of the SMC chip: * 4608 byte packet memory. ( for the 91C92/4. Others have more ) * EEPROM for configuration * AUI/TP selection * * Authors * Erik Stahlman
* Daniel Engstrm
* * History * 98-09-25 Daniel Engstrm Etherboot driver crated from Eric's * Linux driver. * *---------------------------------------------------------------------------*/ #define LINUX_OUT_MACROS 1 #define SMC9000_VERBOSE 1 #define SMC9000_DEBUG 0 #include "etherboot.h" #include "nic.h" #include "cards.h" #include "smc9000.h" # define _outb outb # define _outw outw static const char smc9000_version[] = "Version 0.99 98-09-30"; static unsigned int smc9000_base=0; static const char *interfaces[ 2 ] = { "TP", "AUI" }; static const char *chip_ids[ 15 ] = { NULL, NULL, NULL, /* 3 */ "SMC91C90/91C92", /* 4 */ "SMC91C94", /* 5 */ "SMC91C95", NULL, /* 7 */ "SMC91C100", /* 8 */ "SMC91C100FD", NULL, NULL, NULL, NULL, NULL, NULL }; static const char smc91c96_id[] = "SMC91C96"; /* * Function: smc_reset( int ioaddr ) * Purpose: * This sets the SMC91xx chip to its normal state, hopefully from whatever * mess that any other DOS driver has put it in. * * Maybe I should reset more registers to defaults in here? SOFTRESET should * do that for me. * * Method: * 1. send a SOFT RESET * 2. wait for it to finish * 3. reset the memory management unit * 4. clear all interrupts * */ static void smc_reset(int ioaddr) { /* This resets the registers mostly to defaults, but doesn't * affect EEPROM. That seems unnecessary */ SMC_SELECT_BANK(ioaddr, 0); _outw( RCR_SOFTRESET, ioaddr + RCR ); /* this should pause enough for the chip to be happy */ SMC_DELAY(ioaddr); /* Set the transmit and receive configuration registers to * default values */ _outw(RCR_CLEAR, ioaddr + RCR); _outw(TCR_CLEAR, ioaddr + TCR); /* Reset the MMU */ SMC_SELECT_BANK(ioaddr, 2); _outw( MC_RESET, ioaddr + MMU_CMD ); /* Note: It doesn't seem that waiting for the MMU busy is needed here, * but this is a place where future chipsets _COULD_ break. Be wary * of issuing another MMU command right after this */ _outb(0, ioaddr + INT_MASK); } /*---------------------------------------------------------------------- * Function: smc_probe( int ioaddr ) * * Purpose: * Tests to see if a given ioaddr points to an SMC9xxx chip. * Returns a 0 on success * * Algorithm: * (1) see if the high byte of BANK_SELECT is 0x33 * (2) compare the ioaddr with the base register's address * (3) see if I recognize the chip ID in the appropriate register * * --------------------------------------------------------------------- */ static int smc_probe( int ioaddr ) { word bank; word revision_register; word base_address_register; /* First, see if the high byte is 0x33 */ bank = inw(ioaddr + BANK_SELECT); if ((bank & 0xFF00) != 0x3300) { return -1; } /* The above MIGHT indicate a device, but I need to write to further * test this. */ _outw(0x0, ioaddr + BANK_SELECT); bank = inw(ioaddr + BANK_SELECT); if ((bank & 0xFF00) != 0x3300) { return -1; } /* well, we've already written once, so hopefully another time won't * hurt. This time, I need to switch the bank register to bank 1, * so I can access the base address register */ SMC_SELECT_BANK(ioaddr, 1); base_address_register = inw(ioaddr + BASE); if (ioaddr != (base_address_register >> 3 & 0x3E0)) { #ifdef SMC9000_VERBOSE printf("SMC9000: IOADDR %hX doesn't match configuration (%hX)." "Probably not a SMC chip\n", ioaddr, base_address_register >> 3 & 0x3E0); #endif /* well, the base address register didn't match. Must not have * been a SMC chip after all. */ return -1; } /* check if the revision register is something that I recognize. * These might need to be added to later, as future revisions * could be added. */ SMC_SELECT_BANK(ioaddr, 3); revision_register = inw(ioaddr + REVISION); if (!chip_ids[(revision_register >> 4) & 0xF]) { /* I don't recognize this chip, so... */ #ifdef SMC9000_VERBOSE printf("SMC9000: IO %hX: Unrecognized revision register:" " %hX, Contact author.\n", ioaddr, revision_register); #endif return -1; } /* at this point I'll assume that the chip is an SMC9xxx. * It might be prudent to check a listing of MAC addresses * against the hardware address, or do some other tests. */ return 0; } /************************************************************************** * ETH_RESET - Reset adapter ***************************************************************************/ static void smc9000_reset(struct nic *nic) { smc_reset(smc9000_base); } /************************************************************************** * ETH_TRANSMIT - Transmit a frame ***************************************************************************/ static void smc9000_transmit( struct nic *nic, const char *d, /* Destination */ unsigned int t, /* Type */ unsigned int s, /* size */ const char *p) /* Packet */ { word length; /* real, length incl. header */ word numPages; unsigned long time_out; byte packet_no; word status; int i; /* We dont pad here since we can have the hardware doing it for us */ length = (s + ETH_HLEN + 1)&~1; /* convert to MMU pages */ numPages = length / 256; if (numPages > 7 ) { #ifdef SMC9000_VERBOSE printf("SMC9000: Far too big packet error. \n"); #endif return; } /* dont try more than, say 30 times */ for (i=0;i<30;i++) { /* now, try to allocate the memory */ SMC_SELECT_BANK(smc9000_base, 2); _outw(MC_ALLOC | numPages, smc9000_base + MMU_CMD); status = 0; /* wait for the memory allocation to finnish */ for (time_out = currticks() + 5*TICKS_PER_SEC; currticks() < time_out; ) { status = inb(smc9000_base + INTERRUPT); if ( status & IM_ALLOC_INT ) { /* acknowledge the interrupt */ _outb(IM_ALLOC_INT, smc9000_base + INTERRUPT); break; } } if ((status & IM_ALLOC_INT) != 0 ) { /* We've got the memory */ break; } else { printf("SMC9000: Memory allocation timed out, resetting MMU.\n"); _outw(MC_RESET, smc9000_base + MMU_CMD); } } /* If I get here, I _know_ there is a packet slot waiting for me */ packet_no = inb(smc9000_base + PNR_ARR + 1); if (packet_no & 0x80) { /* or isn't there? BAD CHIP! */ printf("SMC9000: Memory allocation failed. \n"); return; } /* we have a packet address, so tell the card to use it */ _outb(packet_no, smc9000_base + PNR_ARR); /* point to the beginning of the packet */ _outw(PTR_AUTOINC, smc9000_base + POINTER); #if SMC9000_DEBUG > 2 printf("Trying to xmit packet of length %hX\n", length ); #endif /* send the packet length ( +6 for status, length and ctl byte ) * and the status word ( set to zeros ) */ _outw(0, smc9000_base + DATA_1 ); /* send the packet length ( +6 for status words, length, and ctl) */ _outb((length+6) & 0xFF, smc9000_base + DATA_1); _outb((length+6) >> 8 , smc9000_base + DATA_1); /* Write the contents of the packet */ /* The ethernet header first... */ outsw(smc9000_base + DATA_1, d, ETH_ALEN >> 1); outsw(smc9000_base + DATA_1, nic->node_addr, ETH_ALEN >> 1); _outw(htons(t), smc9000_base + DATA_1); /* ... the data ... */ outsw(smc9000_base + DATA_1 , p, s >> 1); /* ... and the last byte, if there is one. */ if ((s & 1) == 0) { _outw(0, smc9000_base + DATA_1); } else { _outb(p[s-1], smc9000_base + DATA_1); _outb(0x20, smc9000_base + DATA_1); } /* and let the chipset deal with it */ _outw(MC_ENQUEUE , smc9000_base + MMU_CMD); status = 0; time_out = currticks() + 5*TICKS_PER_SEC; do { status = inb(smc9000_base + INTERRUPT); if ((status & IM_TX_INT ) != 0) { word tx_status; /* ack interrupt */ _outb(IM_TX_INT, smc9000_base + INTERRUPT); packet_no = inw(smc9000_base + FIFO_PORTS); packet_no &= 0x7F; /* select this as the packet to read from */ _outb( packet_no, smc9000_base + PNR_ARR ); /* read the first word from this packet */ _outw( PTR_AUTOINC | PTR_READ, smc9000_base + POINTER ); tx_status = inw( smc9000_base + DATA_1 ); if (0 == (tx_status & TS_SUCCESS)) { #ifdef SMC9000_VERBOSE printf("SMC9000: TX FAIL STATUS: %hX \n", tx_status); #endif /* re-enable transmit */ SMC_SELECT_BANK(smc9000_base, 0); _outw(inw(smc9000_base + TCR ) | TCR_ENABLE, smc9000_base + TCR ); } /* kill the packet */ SMC_SELECT_BANK(smc9000_base, 2); _outw(MC_FREEPKT, smc9000_base + MMU_CMD); return; } }while(currticks() < time_out); printf("SMC9000: Waring TX timed out, resetting board\n"); smc_reset(smc9000_base); return; } /************************************************************************** * ETH_POLL - Wait for a frame ***************************************************************************/ static int smc9000_poll(struct nic *nic) { if(!smc9000_base) return 0; SMC_SELECT_BANK(smc9000_base, 2); if (inw(smc9000_base + FIFO_PORTS) & FP_RXEMPTY) return 0; /* start reading from the start of the packet */ _outw(PTR_READ | PTR_RCV | PTR_AUTOINC, smc9000_base + POINTER); /* First read the status and check that we're ok */ if (!(inw(smc9000_base + DATA_1) & RS_ERRORS)) { /* Next: read the packet length and mask off the top bits */ nic->packetlen = (inw(smc9000_base + DATA_1) & 0x07ff); /* the packet length includes the 3 extra words */ nic->packetlen -= 6; #if SMC9000_DEBUG > 2 printf(" Reading %d words (and %d byte(s))\n", (nic->packetlen >> 1), nic->packetlen & 1); #endif /* read the packet (and the last "extra" word) */ insw(smc9000_base + DATA_1, nic->packet, (nic->packetlen+2) >> 1); /* is there an odd last byte ? */ if (nic->packet[nic->packetlen+1] & 0x20) nic->packetlen++; /* error or good, tell the card to get rid of this packet */ _outw(MC_RELEASE, smc9000_base + MMU_CMD); return 1; } printf("SMC9000: RX error\n"); /* error or good, tell the card to get rid of this packet */ _outw(MC_RELEASE, smc9000_base + MMU_CMD); return 0; } static void smc9000_disable(struct nic *nic) { if(!smc9000_base) return; /* no more interrupts for me */ SMC_SELECT_BANK(smc9000_base, 2); _outb( 0, smc9000_base + INT_MASK); /* and tell the card to stay away from that nasty outside world */ SMC_SELECT_BANK(smc9000_base, 0); _outb( RCR_CLEAR, smc9000_base + RCR ); _outb( TCR_CLEAR, smc9000_base + TCR ); } /************************************************************************** * ETH_PROBE - Look for an adapter ***************************************************************************/ struct nic *smc9000_probe(struct nic *nic, unsigned short *probe_addrs) { unsigned short revision; int memory; int media; const char * version_string; const char * if_string; int i; /* * the SMC9000 can be at any of the following port addresses. To change, * for a slightly different card, you can add it to the array. Keep in * mind that the array must end in zero. */ static unsigned short portlist[] = { #ifdef SMC9000_SCAN SMC9000_SCAN, #else 0x200, 0x220, 0x240, 0x260, 0x280, 0x2A0, 0x2C0, 0x2E0, 0x300, 0x320, 0x340, 0x360, 0x380, 0x3A0, 0x3C0, 0x3E0, #endif 0 }; printf("\nSMC9000 %s\n", smc9000_version); #ifdef SMC9000_VERBOSE printf("Copyright (C) 1998 Daniel Engstr\x94m\n"); printf("Copyright (C) 1996 Eric Stahlman\n"); #endif /* if no addresses supplied, fall back on defaults */ if (probe_addrs == 0 || probe_addrs[0] == 0) probe_addrs = portlist; /* check every ethernet address */ for (i = 0; probe_addrs[i]; i++) { /* check this specific address */ if (smc_probe(probe_addrs[i]) == 0) smc9000_base = probe_addrs[i]; } /* couldn't find anything */ if(0 == smc9000_base) goto out; /* * Get the MAC address ( bank 1, regs 4 - 9 ) */ SMC_SELECT_BANK(smc9000_base, 1); for ( i = 0; i < 6; i += 2 ) { word address; address = inw(smc9000_base + ADDR0 + i); nic->node_addr[i+1] = address >> 8; nic->node_addr[i] = address & 0xFF; } /* get the memory information */ SMC_SELECT_BANK(smc9000_base, 0); memory = ( inw(smc9000_base + MCR) >> 9 ) & 0x7; /* multiplier */ memory *= 256 * (inw(smc9000_base + MIR) & 0xFF); /* * Now, I want to find out more about the chip. This is sort of * redundant, but it's cleaner to have it in both, rather than having * one VERY long probe procedure. */ SMC_SELECT_BANK(smc9000_base, 3); revision = inw(smc9000_base + REVISION); version_string = chip_ids[(revision >> 4) & 0xF]; if (((revision & 0xF0) >> 4 == CHIP_9196) && ((revision & 0x0F) >= REV_9196)) { /* This is a 91c96. 'c96 has the same chip id as 'c94 (4) but * a revision starting at 6 */ version_string = smc91c96_id; } if ( !version_string ) { /* I shouldn't get here because this call was done before.... */ goto out; } /* is it using AUI or 10BaseT ? */ SMC_SELECT_BANK(smc9000_base, 1); if (inw(smc9000_base + CONFIG) & CFG_AUI_SELECT) media = 2; else media = 1; if_string = interfaces[media - 1]; /* now, reset the chip, and put it into a known state */ smc_reset(smc9000_base); printf("%s rev:%d I/O port:%hX Interface:%s RAM:%d bytes \n", version_string, revision & 0xF, smc9000_base, if_string, memory ); /* * Print the Ethernet address */ printf("Ethernet MAC address: %!\n", nic->node_addr); SMC_SELECT_BANK(smc9000_base, 0); /* see the header file for options in TCR/RCR NORMAL*/ _outw(TCR_NORMAL, smc9000_base + TCR); _outw(RCR_NORMAL, smc9000_base + RCR); /* Select which interface to use */ SMC_SELECT_BANK(smc9000_base, 1); if ( media == 1 ) { _outw( inw( smc9000_base + CONFIG ) & ~CFG_AUI_SELECT, smc9000_base + CONFIG ); } else if ( media == 2 ) { _outw( inw( smc9000_base + CONFIG ) | CFG_AUI_SELECT, smc9000_base + CONFIG ); } nic->reset = smc9000_reset; nic->poll = smc9000_poll; nic->transmit = smc9000_transmit; nic->disable = smc9000_disable; return nic; out: #ifdef SMC9000_VERBOSE printf("No SMC9000 adapters found\n"); #endif smc9000_base = 0; return (0); }
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