260 lines
8.6 KiB
C
260 lines
8.6 KiB
C
/*
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* JLdL 21Jun04.
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*
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* cromutil.c
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*
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* Perform various control operations on the flash EEPROM of
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* _ the 3COM models 3C905C or 3C905CX network cards, in order
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* _ to write a boot program such as Etherboot into it.
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*
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* This program is meant for the Linux operating system only,
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* _ and only for the i386 architecture.
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*
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* The flash EEPROM usually used in these cards is the AT49BV512
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* _ chip, which has 512 Kbit (64 KByte). Another possible chip,
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* _ which is equivalent to this one, is the SST39VF512.
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*
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* Added alternative read128 and prog128 commands for cards with
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* _ the SST29EE020 fast page-write (super-)flash EEPROM, which
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* _ has 2 Mbit (256 KByte), and which has to be programmed in
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* _ a 128-byte page mode. NOTE: it seems that the card can
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* _ address only the first half of the memory in this chip,
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* _ so only 128 Kbytes are actually available for use.
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*
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* Added a few informative messages and a detailed help message.
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*
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*/
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#ifndef __i386__
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# error "This program can't compile or run on non-Intel computers"
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#else
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/io.h>
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#include <string.h>
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int main(int argc, char **argv)
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{
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/* Counters. */
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unsigned int i, j, n;
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/* For ROM chips larger than 64 KB, a long integer
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_ is needed for the global byte counter. */
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unsigned long k;
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/* The I/O address of the card. */
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unsigned int ioaddr;
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/* Storage for a byte. */
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unsigned char b;
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/* Storage for a page. */
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unsigned char buf[128];
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/* Initialize a few things to avoid compiler warnings. */
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i=0; j=0; n=0; k=0;
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/* Verify the command-line parameters; write
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_ out an usage message if needed. */
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if (argc != 3) {
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/* Exactly 2 command line parameters are needed. */
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printf("Usage: ./cromutil ioaddr command [(>|<) file]\n");
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printf(" (try './cromutil 0x0000 help' for details)\n");
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exit(-1);
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}
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/* Set the UID to root if possible. */
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setuid(0);
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/* Get port-access permissions for in{blw}/out{blw}. */
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if (iopl(3)) {
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perror("iopl()");
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exit(1);
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}
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/* Pass the I/O address of the card to a variable. */
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sscanf(argv[1],"%x",&ioaddr);
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/* Set the register window to 0. */
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outw(0x800, ioaddr+0xe);
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/*
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* Execute the requested command.
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*
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* "id": get and write out the ID numbers.
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*/
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if (strcmp(argv[2], "id") == 0) {
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/* Software ID entry command sequence. */
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outl(0x5555, ioaddr+0x4); outb(0xaa, ioaddr+0x8);
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outl(0x2aaa, ioaddr+0x4); outb(0x55, ioaddr+0x8);
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outl(0x5555, ioaddr+0x4); outb(0x90, ioaddr+0x8);
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/* A 10 ms delay is needed. */
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usleep(10000);
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/* Get the manufacturer id. */
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outl(0x0000, ioaddr+0x4);
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printf("Manufacturer ID - %02x\n", inb(ioaddr+0x8));
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/* Get the device id. */
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outl(0x0001, ioaddr+0x4);
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printf("Device ID - %02x\n", inb(ioaddr+0x8));
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/* Software ID exit command sequence. */
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outl(0x5555, ioaddr+0x4); outb(0xaa, ioaddr+0x8);
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outl(0x2aaa, ioaddr+0x4); outb(0x55, ioaddr+0x8);
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outl(0x5555, ioaddr+0x4); outb(0xf0, ioaddr+0x8);
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}
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/*
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* "read": read data from the 512 Kbit ROM.
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*/
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else if (strcmp(argv[2], "read") == 0) {
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/* Loop over the whole ROM. */
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for (k = 0; k < 65536; k++) {
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outl(k, ioaddr+0x4);
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b = inb(ioaddr+0x8);
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write(1, &b, 1);
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}
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/* Write out an informative message. */
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perror("Read 65536 bytes from ROM");
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}
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/*
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* "read128": this alternative is for the 2 Mbit ROM.
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*/
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else if (strcmp(argv[2], "read128") == 0) {
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/* Loop over the accessible part of the ROM. */
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for (k = 0; k < 131072; k++) {
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outl(k, ioaddr+0x4);
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b = inb(ioaddr+0x8);
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write(1, &b, 1);
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}
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/* Write out an informative message. */
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perror("Read 131072 bytes from ROM");
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}
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/*
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* "erase": erase the ROM contents.
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*/
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else if (strcmp(argv[2], "erase") == 0) {
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/* Software chip-erase command sequence. */
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outl(0x5555, ioaddr+0x4); outb(0xaa, ioaddr+0x8);
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outl(0x2aaa, ioaddr+0x4); outb(0x55, ioaddr+0x8);
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outl(0x5555, ioaddr+0x4); outb(0x80, ioaddr+0x8);
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outl(0x5555, ioaddr+0x4); outb(0xaa, ioaddr+0x8);
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outl(0x2aaa, ioaddr+0x4); outb(0x55, ioaddr+0x8);
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outl(0x5555, ioaddr+0x4); outb(0x10, ioaddr+0x8);
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/* Wait a bit. */
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sleep(1);
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/* Write out an informative message. */
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printf("Bios ROM at %04x has been erased: Success\n", ioaddr);
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}
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/*
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* "prog": program the 512 Kbit ROM.
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*/
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else if (strcmp(argv[2], "prog") == 0) {
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/* Loop over the bytes in pages, to
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_ allow for a progress report. */
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for (j = 0; j < 512; j++) {
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for (i = 0; i < 128; i++) {
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/* If this program is to run on a diskless node,
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_ must read in the byte _before_ changing the
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_ mode of the chip, or NFS may block. */
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n = read(0, &b, 1);
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/* At EOF exit the inner loop. */
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if (n == 0)
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break;
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if (n < 0) {
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perror("Input File Error");
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exit(-3);
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}
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/* Disable SDP temporarily for programming a byte. */
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outl(0x5555, ioaddr+0x4); outb(0xaa, ioaddr+0x8);
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outl(0x2aaa, ioaddr+0x4); outb(0x55, ioaddr+0x8);
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outl(0x5555, ioaddr+0x4); outb(0xA0, ioaddr+0x8);
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/* Calculate the address of the byte. */
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k=i+128*j;
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/* Program this byte. */
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outl(k, ioaddr+0x4); outb(b, ioaddr+0x8);
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/* Wait for the programming of this byte to complete. */
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while (inb(ioaddr+0x8) != b)
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;
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}
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/* At EOF exit the outer loop. */
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if (n == 0)
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break;
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/* Write out a progress report. */
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printf("."); fflush(NULL);
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}
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/* Write out an informative message. */
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printf("\nWrote %ld bytes to ROM: Success\n", k);
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}
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/*
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* "prog128": this alternative is for the 2 Mbit ROM.
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*/
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else if (strcmp(argv[2], "prog128") == 0) {
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/* Loop over the accessible pages; the card can
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_ access only the first half of the chip. */
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for (j = 0; j < 1024; j++) {
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/* If this program is to run on a diskless node,
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_ must read in the page _before_ changing the
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_ mode of the chip, or NFS may block. */
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n = read(0, buf, 128);
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/* At EOF exit the loop. */
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if (n == 0)
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break;
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if (n < 0) {
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perror("Input File Error");
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exit(-3);
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}
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/* Disable SDP temporarily for programming a page. */
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outl(0x5555, ioaddr+0x4); outb(0xaa, ioaddr+0x8);
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outl(0x2aaa, ioaddr+0x4); outb(0x55, ioaddr+0x8);
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outl(0x5555, ioaddr+0x4); outb(0xA0, ioaddr+0x8);
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/* Loop over the bytes in a page. */
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for (i = 0; i < n; i++) {
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/* Calculate the address of the byte. */
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k=i+128*j;
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/* Program this byte. */
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outl(k, ioaddr+0x4); outb(buf[i], ioaddr+0x8);
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}
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/* Wait for the programming of this page to complete. */
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while (inb(ioaddr+0x8) != buf[i-1])
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;
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/* Write out a progress report. */
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printf("."); fflush(NULL);
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}
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/* Write out an informative message. */
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printf("\nWrote %d pages to ROM: Success\n", j);
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}
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/*
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* "help": write out a detailed help message.
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*/
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else if (strcmp(argv[2], "help") == 0) {
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printf("This utility can be used to write data, usually boot loaders\n");
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printf(" such as Etherboot, to the flash EEPROM of the 3COM models\n");
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printf(" 3C905C and 3C905CX network cards. You use it like this:\n");
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printf(" ./cromutil ioaddr command [(>|<) file]\n");
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printf("Here ioaddr is the hexadecimal I/O address of the card, such\n");
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printf(" as 0xA123, in some cases you need input/output redirection\n");
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printf(" from/to a file, and the command can be one of these:\n");
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printf(" id get the ID numbers of the card;\n");
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printf(" read > file read the contents of the ROM into a file;\n");
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printf(" read128 > file read the contents of the ROM into a file;\n");
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printf(" erase erase the whole ROM to the 1 state;\n");
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printf(" prog < file write the contents of a file into the ROM;\n");
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printf(" prog128 < file write the contents of a file into the ROM.\n");
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printf("You can get the I/O address of the card using the commands\n");
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printf(" 'lspci -v', 'cat /proc/pci', or 'dmesg | grep -i 3C905C'.\n");
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printf("The read and prog commands are to be used if the card has a\n");
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printf(" traditional 512 Kb (64 KB) flash EEPROM chip, such as:\n");
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printf(" | AT49BV512 | SST39VF512 |\n");
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printf("The read128 and prog128 versions are for cards with a 2 Mb\n");
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printf(" (128 KB usable) page-write flash EEPROM chip, such as:\n");
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printf(" | SST29EE020 |\n");
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}
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/*
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* Write out the usage message if an unknown command is used.
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*/
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else {
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printf("Usage: ./cromutil ioaddr command [(>|<) file]\n");
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printf("(try './cromutil 0x0000 help' for details)\n");
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exit(-1);
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}
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return 0;
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}
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#endif /* __i386__ */
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