/*
 * Copyright (C) 1992-1994,2001 by Joerg Wunsch, Dresden
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD: src/usr.sbin/fdformat/fdformat.c,v 1.11.2.4 2001/07/19 13:20:42 joerg Exp $
 */

/*
 * FreeBSD:
 * format a floppy disk
 *
 * Added FD_GTYPE ioctl, verifying, proportional indicators.
 * Serge Vakulenko, vak@zebub.msk.su
 * Sat Dec 18 17:45:47 MSK 1993
 *
 * Final adaptation, change format/verify logic, add separate
 * format gap/interleave values
 * Andrew A. Chernov, ache@astral.msk.su
 * Thu Jan 27 00:47:24 MSK 1994
 */

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <machine/ioctl_fd.h>

static void
format_track(int fd, int cyl, int secs, int head, int rate,
             int gaplen, int secsize, int fill,int interleave)
{
        struct fd_formb f;
        int i, j;
        int il[FD_MAX_NSEC + 1];

        memset(il, 0, sizeof(il));
        for (j = 0, i = 1; i <= secs; i++) {
                while (il[(j % secs) + 1])
                        j++;
                il[(j % secs) + 1] = i;
                j += interleave;
        }

        f.format_version = FD_FORMAT_VERSION;
        f.head = head;
        f.cyl = cyl;
        f.transfer_rate = rate;

        f.fd_formb_secshift = secsize;
        f.fd_formb_nsecs = secs;
        f.fd_formb_gaplen = gaplen;
        f.fd_formb_fillbyte = fill;
        for (i = 0; i < secs; i++) {
                f.fd_formb_cylno(i) = cyl;
                f.fd_formb_headno(i) = head;
                f.fd_formb_secno(i) = il[i+1];
                f.fd_formb_secsize(i) = secsize;
        }
        if (ioctl(fd, FD_FORM, (caddr_t)&f) < 0)
                err(1, "ioctl(FD_FORM)");
}

static int
verify_track(int fd, int track, int tracksize)
{
        static char *buf = NULL;
        static int bufsz = 0;
        int fdopts = -1, ofdopts, rv = 0;

        if (ioctl(fd, FD_GOPTS, &fdopts) < 0)
                warn("warning: ioctl(FD_GOPTS)");
        else {
                ofdopts = fdopts;
                fdopts |= FDOPT_NORETRY;
                ioctl(fd, FD_SOPTS, &fdopts);
        }

        if (bufsz < tracksize) {
                if (buf != NULL)        /* XXX why would this ever be? */
                        free(buf);
                bufsz = tracksize;
                buf = NULL;
        }
        if (buf == NULL)
                buf = malloc(bufsz);
        if (buf == NULL)
                errx(2, "out of memory");
        if (lseek(fd, (long)track * tracksize, 0) < 0)
                rv = -1;
        /* try twice reading it, without using the normal retrier */
        else if (read(fd, buf, tracksize) != tracksize
                 && read(fd, buf, tracksize) != tracksize)
                rv = -1;
        if(fdopts != -1)
                ioctl(fd, FD_SOPTS, &ofdopts);
        return(rv);
}

static const char *
makename(const char *arg, const char *suffix)
{
        static char namebuff[20];       /* big enough for "/dev/fd0a"... */

        memset(namebuff, 0, 20);
        if(*arg == '\0') /* ??? */
                return(arg);
        if(*arg == '/')  /* do not convert absolute pathnames */
                return(arg);
        strcpy(namebuff, _PATH_DEV);
        strncat(namebuff, arg, 3);
        strcat(namebuff, suffix);
        return(namebuff);
}

static void
usage(void)
{
        fprintf(stderr, "%s\n%s\n",
        "usage: fdformat [-y] [-q] [-n | -v] [-f #] [-c #] [-s #] [-h #]",
        "                [-r #] [-g #] [-i #] [-S #] [-F #] [-t #] devname");
        exit(2);
}

static int
yes(void)
{
        char reply[256], *p;

        reply[sizeof(reply) - 1] = 0;
        for (;;) {
                fflush(stdout);
                if (fgets(reply, sizeof(reply) - 1, stdin) == NULL)
                        return(0);
                for (p = reply; *p == ' ' || *p == '\t'; ++p)
                        continue;
                if (*p == 'y' || *p == 'Y')
                        return(1);
                if (*p == 'n' || *p == 'N' || *p == '\n' || *p == '\r')
                        return(0);
                printf("Answer `yes' or `no': ");
        }
}

/*
 * Some definitions imported from /sys/isa/ic/nec765.h for convenience.
 */

/* Status register ST0 */
#define NE7_ST0_IC      0xc0    /* interrupt completion code */
#define NE7_ST0_IC_AT   0x40    /* abnormal termination, check error stat */
#define NE7_ST0_IC_RC   0xc0    /* terminated due to ready changed, n/a */

/* Status register ST1 */
#define NE7_ST1_EN      0x80    /* end of cylinder, access past last record */
#define NE7_ST1_DE      0x20    /* data error, CRC fail in ID or data */
#define NE7_ST1_ND      0x04    /* no data, sector not found or CRC in ID f. */
#define NE7_ST1_MA      0x01    /* missing address mark (in ID or data field)*/

/* Status register ST2 */
#define NE7_ST2_DD      0x20    /* data error in data field, CRC fail */
#define NE7_ST2_WC      0x10    /* wrong cylinder, ID field mismatches cmd */
#define NE7_ST2_MD      0x01    /* missing address mark in data field */

/*
 * Decode the FDC status pointed to by `fdcsp', and print a textual
 * translation to stderr.
 */
static void
printstatus(struct fdc_status *fdcsp)
{
        char msgbuf[100];

        if ((fdcsp->status[0] & NE7_ST0_IC_RC) != NE7_ST0_IC_AT) {
                sprintf(msgbuf, "unexcpted interrupt code %#x",
                        fdcsp->status[0] & NE7_ST0_IC_RC);
        } else {
                strcpy(msgbuf, "unexpected error code in ST1/ST2");

                if (fdcsp->status[1] & NE7_ST1_EN)
                        strcpy(msgbuf, "end of cylinder (wrong format)");
                else if (fdcsp->status[1] & NE7_ST1_DE) {
                        if (fdcsp->status[2] & NE7_ST2_DD)
                                strcpy(msgbuf, "CRC error in data field");
                        else
                                strcpy(msgbuf, "CRC error in ID field");
                } else if (fdcsp->status[1] & NE7_ST1_MA) {
                        if (fdcsp->status[2] & NE7_ST2_MD)
                                strcpy(msgbuf, "no address mark in data field");
                        else
                                strcpy(msgbuf, "no address mark in ID field");
                } else if (fdcsp->status[2] & NE7_ST2_WC)
                        strcpy(msgbuf, "wrong cylinder (format mismatch)");
                else if (fdcsp->status[1] & NE7_ST1_ND)
                        strcpy(msgbuf, "no data (sector not found)");
        }
        fputs(msgbuf, stderr);
}

int
main(int argc, char **argv)
{
        int format = -1, cyls = -1, secs = -1, heads = -1, intleave = -1;
        int rate = -1, gaplen = -1, secsize = -1, steps = -1;
        int fill = 0xf6, quiet = 0, verify = 1, verify_only = 0, confirm = 0;
        int fd, c, i, track, error, tracks_per_dot, bytes_per_track, errs;
        int fdopts;
        const char *dev_name, *suffix;
        struct fd_type fdt;
#define MAXPRINTERRS 10
        struct fdc_status fdcs[MAXPRINTERRS];

        while ((c = getopt(argc, argv, "f:c:s:h:r:g:S:F:t:i:qyvn")) != -1)
                switch (c) {
                case 'f':       /* format in kilobytes */
                        format = atoi(optarg);
                        break;

                case 'c':       /* # of cyls */
                        cyls = atoi(optarg);
                        break;

                case 's':       /* # of secs per track */
                        secs = atoi(optarg);
                        break;

                case 'h':       /* # of heads */
                        heads = atoi(optarg);
                        break;

                case 'r':       /* transfer rate, kilobyte/sec */
                        rate = atoi(optarg);
                        break;

                case 'g':       /* length of GAP3 to format with */
                        gaplen = atoi(optarg);
                        break;

                case 'S':       /* sector size shift factor (1 << S)*128 */
                        secsize = atoi(optarg);
                        break;

                case 'F':       /* fill byte, C-like notation allowed */
                        fill = (int)strtol(optarg, NULL, 0);
                        break;

                case 't':       /* steps per track */
                        steps = atoi(optarg);
                        break;

                case 'i':       /* interleave factor */
                        intleave = atoi(optarg);
                        break;

                case 'q':
                        quiet = 1;
                        break;

                case 'y':
                        confirm = 1;
                        break;

                case 'n':
                        verify = 0;
                        break;

                case 'v':
                        verify = 1;
                        verify_only = 1;
                        break;

                case '?': default:
                        usage();
                }

        if (optind != argc - 1)
                usage();

        switch (format) {
        default:
                errx(2, "bad floppy size: %dK", format);
        case -1:   suffix = "";      break;
        case 360:  suffix = ".360";  break;
        case 640:  suffix = ".640";  break;
        case 720:  suffix = ".720";  break;
        case 800:  suffix = ".800";  break;
        case 820:  suffix = ".820";  break;
        case 1200: suffix = ".1200"; break;
        case 1232: suffix = ".1232"; break;
        case 1440: suffix = ".1440"; break;
        case 1480: suffix = ".1480"; break;
        case 1720: suffix = ".1720"; break;
        }

        dev_name = makename(argv[optind], suffix);

        if ((fd = open(dev_name, O_RDWR)) < 0)
                err(1, "%s", dev_name);

        if (ioctl(fd, FD_GTYPE, &fdt) < 0)
                errx(1, "not a floppy disk: %s", dev_name);
        fdopts = FDOPT_NOERRLOG;
        if (ioctl(fd, FD_SOPTS, &fdopts) == -1)
                err(1, "ioctl(FD_SOPTS, FDOPT_NOERRLOG)");

        switch(rate) {
        case -1:  break;
        case 250: fdt.trans = FDC_250KBPS; break;
        case 300: fdt.trans = FDC_300KBPS; break;
        case 500: fdt.trans = FDC_500KBPS; break;
        default:
                errx(2, "invalid transfer rate: %d", rate);
        }

        if (cyls >= 0)    fdt.tracks = cyls;
        if (secs >= 0)    fdt.sectrac = secs;
        if (fdt.sectrac > FD_MAX_NSEC)
                errx(2, "too many sectors per track, max value is %d", FD_MAX_NSEC);
        if (heads >= 0)   fdt.heads = heads;
        if (gaplen >= 0)  fdt.f_gap = gaplen;
        if (secsize >= 0) fdt.secsize = secsize;
        if (steps >= 0)   fdt.steptrac = steps;
        if (intleave >= 0) fdt.f_inter = intleave;

        bytes_per_track = fdt.sectrac * (1 << fdt.secsize) * 128;

        /* XXX  20/40 = 0.5 */
        tracks_per_dot = (fdt.tracks * fdt.heads + 20) / 40;

        if (verify_only) {
                if (!quiet)
                        printf("Verify %dK floppy `%s'.\n",
                                fdt.tracks * fdt.heads * bytes_per_track / 1024,
                                dev_name);
        }
        else if (!quiet && !confirm) {
                printf("Format %dK floppy `%s'? (y/n): ",
                        fdt.tracks * fdt.heads * bytes_per_track / 1024,
                        dev_name);
                if (!yes()) {
                        printf("Not confirmed.\n");
                        return(3);
                }
        }

        /*
         * Formatting.
         */
        if (!quiet) {
                printf("Processing ");
                for (i = 0; i < (fdt.tracks * fdt.heads) / tracks_per_dot; i++)
                        putchar('-');
                printf("\rProcessing ");
                fflush(stdout);
        }

        error = errs = 0;

        for (track = 0; track < fdt.tracks * fdt.heads; track++) {
                if (!verify_only) {
                        format_track(fd, track / fdt.heads, fdt.sectrac,
                                track % fdt.heads, fdt.trans, fdt.f_gap,
                                fdt.secsize, fill, fdt.f_inter);
                        if(!quiet && !((track + 1) % tracks_per_dot)) {
                                putchar('F');
                                fflush(stdout);
                        }
                }
                if (verify) {
                        if (verify_track(fd, track, bytes_per_track) < 0) {
                                error = 1;
                                if (errs < MAXPRINTERRS && errno == EIO) {
                                        if (ioctl(fd, FD_GSTAT, fdcs + errs) ==
                                            -1)
                                                errx(1,
                                        "floppy IO error, but no FDC status");
                                        errs++;
                                }
                        }
                        if(!quiet && !((track + 1) % tracks_per_dot)) {
                                if (!verify_only)
                                        putchar('\b');
                                if (error) {
                                        putchar('E');
                                        error = 0;
                                }
                                else
                                        putchar('V');
                                fflush(stdout);
                        }
                }
        }
        if (!quiet)
                printf(" done.\n");

        if (!quiet && errs) {
                fflush(stdout);
                fprintf(stderr, "Errors encountered:\nCyl Head Sect   Error\n");
                for (i = 0; i < errs && i < MAXPRINTERRS; i++) {
                        fprintf(stderr, " %2d   %2d   %2d   ",
                                fdcs[i].status[3], fdcs[i].status[4],
                                fdcs[i].status[5]);
                        printstatus(fdcs + i);
                        putc('\n', stderr);
                }
                if (errs >= MAXPRINTERRS)
                        fprintf(stderr, "(Further errors not printed.)\n");
        }

        return(errs != 0);
}