root/lm-sensors/trunk/prog/dump/isadump.c @ 2661

/*
    isadump.c - isadump, a user-space program to dump ISA registers
    Copyright (C) 2000  Frodo Looijaard <frodol@dds.nl>, and
                        Mark D. Studebaker <mdsxyz123@yahoo.com>
    Copyright (C) 2004  The lm_sensors group

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

/*
        Typical usage:
        isadump 0x295 0x296             Basic winbond dump using address/data registers
        isadump 0x295 0x296 2           Winbond dump, bank 2
        isadump 0x2e 0x2f 0x09          Super-I/O, logical device 9
        isadump -f 0x5000               Flat address space dump like for Via 686a
        isadump -f 0xecf0 0x10 1        PC87366, temperature channel 2
*/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>


/* To keep glibc2 happy */
#if defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ >= 0
#include <sys/io.h>
#else
#include <asm/io.h>
#endif

#ifdef __powerpc__
unsigned long isa_io_base = 0; /* XXX for now */
#endif /* __powerpc__ */

char hexchar(int i)
{
        if ((i >= 0) && (i <= 9))
                return '0' + i;
        else if (i <= 15)
                return 'a' - 10 + i;
        else
                return 'X';
}

void help(void)
{
        fprintf(stderr,
                "Syntax for I2C-like access:\n"
                "  isadump ADDRREG DATAREG [BANK [BANKREG]]\n"
                "Syntax for flat address space:\n"
                "  isadump -f ADDRESS [RANGE [BANK [BANKREG]]]\n");
}

int default_bankreg(int flat, int addrreg, int datareg)
{
        if (flat) {
                return 0x09; /* Works for National Semiconductor
                                Super-IO chips */
        }

        if ((addrreg == 0x2e && datareg == 0x2f)
         || (addrreg == 0x4e && datareg == 0x4f)) {
                return 0x07; /* Works for all Super-I/O chips */
        }
        
        return 0x4e; /* Works for Winbond ISA chips, default */
}

int set_bank(int flat, int addrreg, int datareg, int bank, int bankreg)
{
        int oldbank;

        if (flat) {
                oldbank = inb(addrreg+bankreg);
                outb(bank, addrreg+bankreg);
        } else {
                outb(bankreg, addrreg);
                oldbank = inb(datareg);
                outb(bank, datareg);
        }

        return oldbank;
}

int main(int argc, char *argv[])
{
        int addrreg;        /* address in flat mode */
        int datareg = 0;    /* unused in flat mode */
        int range = 256;    /* can be changed only in flat mode */
        int bank = -1;      /* -1 means no bank operation */
        int bankreg;
        int oldbank = 0;
        int i, j, res;
        int flat = 0;
        char *end;

        if (argc < 3) {
                help();
                exit(1);
        }

        if (!strcmp(argv[1], "-f")) {
                flat = 1;
        }

        addrreg = strtol(argv[1+flat], &end, 0);
        if (*end) {
                fprintf(stderr, "Error: Invalid address!\n");
                help();
                exit(1);
        }
        if (addrreg < 0 || addrreg > (flat?0xffff:0x3fff)) {
                fprintf(stderr, "Error: Address out of range "
                        "(0x0000-0x%04x)!\n", flat?0xffff:0x3fff);
                help();
                exit(1);
        }

        if (flat) {
                if (argc > 3) {
                        range = strtol(argv[3], &end, 0);
                        if (*end || range <= 0 || range > 0x100
                         || range & 0xf) {
                                fprintf(stderr, "Error: Invalid range!\n"
                                        "Hint: Must be a multiple of 16 no "
                                        "greater than 256.\n");
                                help();
                                exit(1);
                        }
                } else {
                        addrreg &= 0xff00; /* Force alignment */
                }
        } else {
                datareg = strtol(argv[2], &end, 0);
                if (*end) {
                        fprintf(stderr, "Error: Invalid data register!\n");
                        help();
                        exit(1);
                }
                if (datareg < 0 || datareg > 0x3fff) {
                        fprintf(stderr, "Error: Data register out of range "
                                "(0x0000-0x3fff)!\n");
                        help();
                        exit(1);
                }
        }

        bankreg = default_bankreg(flat, addrreg, datareg);

        if (argc > 3+flat) {
                bank = strtol(argv[3+flat], &end, 0);
                if (*end) {
                        fprintf(stderr, "Error: Invalid bank number!\n");
                        help();
                        exit(1);
                }
                if ((bank < 0) || (bank > 15)) {
                        fprintf(stderr, "Error: bank out of range (0-15)!\n");
                        help();
                        exit(1);
                }

                if (argc > 4+flat) {
                        bankreg = strtol(argv[4+flat], &end, 0);
                        if (*end) {
                                fprintf(stderr, "Error: Invalid bank "
                                        "register!\n");
                                help();
                                exit(1);
                        }
                        if (bankreg < 0 || bankreg >= range) {
                                fprintf(stderr, "Error: bank out of range "
                                        "(0x00-0x%02x)!\n", range-1);
                                help();
                                exit(1);
                        }
                }
        }

        if (getuid()) {
                fprintf(stderr, "Error: Can only be run as root (or make it "
                        "suid root)\n");
                exit(1);
        }

        fprintf(stderr, "WARNING! Running this program can cause system "
                "crashes, data loss and worse!\n");
        if (flat)
                fprintf(stderr, "I will probe address range 0x%04x to "
                        "0x%04x.\n", addrreg, addrreg + range - 1);
        else
                fprintf(stderr, "I will probe address register 0x%04x and "
                        "data register 0x%04x.\n", addrreg, datareg);
        if (bank>=0)    
                fprintf(stderr, "Probing bank %d using bank register "
                        "0x%02x.\n", bank, bankreg);
        fprintf(stderr, "You have five seconds to reconsider and press "
                "CTRL-C!\n\n");
        sleep(5);

#ifndef __powerpc__
        if ((datareg < 0x400) && (addrreg < 0x400) && !flat) {
                if (ioperm(datareg, 1, 1)) {
                        fprintf(stderr, "Error: Could not ioperm() data "
                                "register!\n");
                        exit(1);
                }
                if (ioperm(addrreg, 1, 1)) {
                        fprintf(stderr, "Error: Could not ioperm() address "
                                "register!\n");
                        exit(1);
                }
        } else {
                if (iopl(3)) {
                        fprintf(stderr, "Error: Could not do iopl(3)!\n");
                        exit(1);
                }
        }
#endif

        if (bank >= 0)
                oldbank = set_bank(flat, addrreg, datareg, bank, bankreg);

        printf("     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f\n");
        for (i = 0; i < range; i += 16) {
                printf("%c0: ", hexchar(i/16));
                for (j = 0; j < 16; j++) {
                        if (flat) {
                                res = inb(addrreg + i + j);
                        } else {        
                                outb(i+j, addrreg);
                                res = inb(datareg);
                        }
                        printf("%c%c ", hexchar(res/16), hexchar(res%16));
                }
                printf("\n");
        }

        /* Restore the original bank value */
        if (bank >= 0)
                set_bank(flat, addrreg, datareg, oldbank, bankreg);

        exit(0);
}