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#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <linux/fd.h>
#include "parse.h"
#include "mediaprmP.h"
#include "driveprm.h"
#include "mediaprm.h"
typedef enum
{
FE_UNKNOWN,
FE_SIZE,
FE_SECT,
FE_VSECT,
FE_HEAD,
FE_CYL,
/* the stretch byte */
FE_TPI,
FE_STRETCH,
FE_SWAPSIDES,
FE_ZEROBASED,
FE_GAP,
FE_FM,
FE_PERP,
FE_SSIZE,
FE_2M,
FE_DTR,
FE_SPEC1, /* spec1, obsolete */
FE_FMT_GAP,
FE_DENSITY,
} field_t;
static int SIZE, SECT, VSECT, HEAD, CYL, TPI, STRETCH, SWAPSIDES, ZEROBASED;
static int GAP, FM;
static int PERP, SSIZE, _2M, DTR, SPEC1, FMT_GAP, DENSITY;
static int ssize;
#define F_SIZE FE_SIZE,&SIZE
#define F_SECT FE_SECT,&SECT
#define F_VSECT FE_VSECT,&VSECT
#define F_HEAD FE_HEAD,&HEAD
#define F_CYL FE_CYL,&CYL
#define F_TPI FE_TPI,&TPI
#define F_STRETCH FE_STRETCH,&STRETCH
#define F_SWAPSIDES FE_SWAPSIDES,&SWAPSIDES
#define F_ZEROBASED FE_ZEROBASED,&ZEROBASED
#define F_GAP FE_GAP,&GAP
#define F_FM FE_FM,&FM
#define F_PERP FE_PERP,&PERP
#define F_SSIZE FE_SSIZE,&SSIZE
#define F_2M FE_2M,&_2M
#define F_DTR FE_DTR,&DTR
#define F_SPEC1 FE_SPEC1,&SPEC1
#define F_FMT_GAP FE_FMT_GAP,&FMT_GAP
#define F_DENSITY FE_DENSITY,&DENSITY
static int mask;
static keyword_t ids[]= {
{ "size", F_SIZE, 0 },
{ "sect", F_SECT, 0},
{ "tracksize", F_VSECT, 0},
{ "head", F_HEAD, 0},
{ "ss", F_HEAD, 1},
{ "ds", F_HEAD, 2},
{ "cyl", F_CYL, 0},
{ "tpi", F_TPI, 0 },
{ "stretch", F_STRETCH, 0 },
{ "swapsides", F_SWAPSIDES, 1},
{ "zerobased", F_ZEROBASED, 1},
{ "zero-based", F_ZEROBASED, 1},
{ "gap", F_GAP, 0},
{ "fm", F_FM, 1},
{ "perp", F_PERP, 0},
{ "ssize", F_SSIZE, 0},
{ "2m", F_2M, 1},
{ "dtr", F_DTR, 0},
{ "mss", F_SSIZE, 16384 },
{ "sd", F_DENSITY, DENS_SD },
{ "dd", F_DENSITY, DENS_DD },
{ "qd", F_DENSITY, DENS_QD },
{ "hd", F_DENSITY, DENS_HD },
{ "ed", F_DENSITY, DENS_ED },
{ "spec1", F_SPEC1, 0},
{ "fmt_gap", F_FMT_GAP, 0}
};
struct
{
int dtr; /* dtr, as it would be in a 3 1/2 or DD drive */
int fm; /* fm mode */
int perp; /* perp mode */
int tpi;
int capacity[4]; /* capacity per track */
} dens_tab[] = {
{ 0, 0, 0, 0}, /* none */
{2, 1, 0, 48, { 2500, 2500, 2500, 2500} }, /* SD */
{2, 0, 0, 48, { 6250, 6250, 6250, 6250} }, /* DD */
{1, 0, 0, 96, { 6250, 7500, 6250, 0} }, /* QD */
{0, 0, 0, 96, {12500,12500,10416, 0} }, /* HD */
{3, 0, 1, 96, {25000,25000, 0, 0} } /* ED */
};
int gap[4] = { 0x1b, 0x23, 0x2a, 0x1b };
static inline void set_field(field_t slot, int *var, int value)
{
if( !(mask & (1 << slot)))
*var = value;
}
static void compute_params(drivedesc_t *drvprm,
struct floppy_struct *medprm)
{
int r, capacity, mysize;
int header_size, fmt_gap;
set_field(F_DENSITY, drvprm->type.max_density);
r = dens_tab[DENSITY].dtr;
if(r == 2 && drvprm->type.rpm == 360)
r = 1;
capacity = dens_tab[DENSITY].capacity[drvprm->type.ff];
set_field(F_DTR, r);
set_field(F_GAP, gap[DTR]);
set_field(F_FM, dens_tab[DENSITY].fm);
set_field(F_PERP, dens_tab[DENSITY].perp);
set_field(F_HEAD, 2);
/* 5 1/4 drives have two different cylinder densities */
if(drvprm->type.ff == FF_525) {
if(DENSITY == DENS_DD)
/* double density disks are 48 TPI */
set_field(F_TPI, 48);
else
set_field(F_TPI, 96);
if(mask & (1 << FE_CYL)) {
/* we know the number of cylinders, try to infer
* cylinder density from there */
if(CYL < 50)
set_field(F_TPI, 48);
if(CYL > 70)
set_field(F_TPI, 96);
}
if(drvprm->type.tpi == 96 && TPI == 48)
set_field(F_STRETCH, 1);
else
set_field(F_STRETCH, 0);
/* if, on the other hand, we know TPI, but not the number of
* cylinders, infer in the other direction */
if(TPI == 48)
set_field(F_CYL, 40);
else
set_field(F_CYL, 80);
} else {
set_field(F_STRETCH, 0);
set_field(F_CYL, 80);
}
if(PERP)
header_size = 81;
else
header_size = 62;
switch(capacity) {
case 25000:
set_field(F_SECT, 36);
break;
case 12500:
set_field(F_SECT, 18);
break;
case 10416:
set_field(F_SECT, 15);
break;
case 6250:
set_field(F_SECT, 9);
break;
default:
set_field(F_SECT, capacity / (SSIZE + header_size + 1));
}
set_field(F_SSIZE, 512);
set_field(F_VSECT, SECT * SSIZE);
set_field(F_SIZE, HEAD * CYL * VSECT / 512);
if(mask & ( 1 << FE_SSIZE) ) {
mysize = 128;
for(ssize = 0; ssize < 8 ; ssize++) {
if(mysize == SSIZE)
break;
mysize += mysize;
}
if(ssize == 8) {
fprintf(stderr,"Bad sector size\n");
exit(1);
}
ssize = (ssize + 6) % 8;
} else
ssize = 0;
if(VSECT && VSECT >= SSIZE) {
fmt_gap = (capacity * 199 / 200 / (VSECT / SSIZE)) -
SSIZE - header_size;
if(fmt_gap < 1)
fmt_gap = 1;
if(fmt_gap > 0x6c)
fmt_gap = 0x6c;
set_field(F_FMT_GAP, fmt_gap);
}
set_field(F_2M,0);
medprm->size = SIZE;
medprm->sect = VSECT / 512;
medprm->head = HEAD;
medprm->track = CYL;
medprm->stretch = STRETCH | (SWAPSIDES << 1) | (ZEROBASED << 2);
medprm->gap = GAP;
medprm->rate = (FM<<7) | (PERP<<6) | (ssize<<3) | (_2M<<2) | DTR;
medprm->spec1 = SPEC1;
medprm->fmt_gap = FMT_GAP;
}
/* ========================================= *
* Routines called by other parts of fdutils *
* ========================================= */
static int parse_indirect(int argc, char **argv,
drivedesc_t *drvprm,
struct floppy_struct *medprm)
{
int found;
if(argc != 1)
return 2; /* more than one parameter */
mediaprmin = fopen(MEDIAPRMFILE, "r");
if(!mediaprmin)
return 2; /* no file */
zero_all(ids, &mask);
found = 0;
mediaprmlex(argv[0], ids, sizeof(ids)/sizeof(ids[0]), &mask, &found);
fclose(mediaprmin);
if(!found)
return 1;
compute_params(drvprm, medprm);
return 0;
}
static int parse_direct(int argc, char **argv,
drivedesc_t *drvprm,
struct floppy_struct *medprm)
{
int i,r;
mask = 0;
zero_all(ids, &mask);
for(i=0; i<argc; i++) {
r=set_int(argv[i], ids, &mask);
if(r)
return r;
}
compute_params(drvprm, medprm);
return 0;
}
/* ========================================= */
/* Testing */
/* ========================================= */
int parse_mediaprm(int argc, char **argv,
drivedesc_t *drvprm,
struct floppy_struct *medprm)
{
int r;
return ((r=parse_direct(argc, argv, drvprm, medprm) &&
(r=parse_indirect(argc, argv, drvprm, medprm))));
}
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