a0740109167815238b0fd97c2131de135e2f5b2bvboxsync/* $Id$ */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync/** @file
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync * Floppy drive tables.
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync/*
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync * Copyright (C) 2011-2013 Oracle Corporation
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync *
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync * available from http://www.virtualbox.org. This file is free software;
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync * you can redistribute it and/or modify it under the terms of the GNU
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync * General Public License (GPL) as published by the Free Software
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#include <stdint.h>
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#include <string.h>
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#include "biosint.h"
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#include "inlines.h"
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync/**
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync * Extended DPT (Disk Parameter Table) structure.
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsynctypedef struct
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync{
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t spec1; /* First SPECIFY byte. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t spec2; /* Second SPECIFY byte. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t mot_wait; /* Motor wait time after operation. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t ss_code; /* Sector size code. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t eot; /* End of Track (ID of last sector). */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t gap; /* Gap length. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t dtl; /* Data length. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t fmt_gap; /* Gap length for format. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t fmt_fill; /* Format fill byte. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t hd_settle; /* Head settle time (msec). */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t mot_start; /* Motor start time (1/8 sec units). */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t max_trk; /* Maximum track number. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t rate; /* Data transfer rate code. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync} dpt_ext;
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsyncct_assert(sizeof(dpt_ext) == 13);
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync/* Motor spin-up wait time in BIOS ticks (~2 seconds). */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define MOTOR_WAIT 0x25
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync/* Data rates as stored in the DPT */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define RATE_250K 0x80
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define RATE_300K 0x40
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define RATE_500K 0x00
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define RATE_1M 0xC0
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync/* In the 13-entry DPT, 7 entries are constant. Use a macro to set those. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define MAKE_DPT_ENTRY(sp1, eot, gap, fgp, mxt, dtr) \
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync { sp1, 2, MOTOR_WAIT, 2, eot, gap, 0xFF, fgp, 0xF6, 15, 8, mxt, dtr }
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsyncdpt_ext fd_parm[] = {
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync MAKE_DPT_ENTRY(0xDF, 9, 0x2A, 0x50, 39, RATE_250K), /* 360K disk/360K drive */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync MAKE_DPT_ENTRY(0xDF, 9, 0x2A, 0x50, 39, RATE_300K), /* 360K disk/1.2M drive */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync MAKE_DPT_ENTRY(0xDF, 15, 0x1B, 0x54, 79, RATE_500K), /* 1.2M disk */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync MAKE_DPT_ENTRY(0xDF, 9, 0x2A, 0x50, 79, RATE_250K), /* 720K disk */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync MAKE_DPT_ENTRY(0xAF, 18, 0x1B, 0x6C, 79, RATE_500K), /* 1.44M disk */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync MAKE_DPT_ENTRY(0xAF, 36, 0x1B, 0x54, 79, RATE_1M), /* 2.88M disk */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync MAKE_DPT_ENTRY(0xAF, 255, 0x1B, 0x54, 255, RATE_500K) /* Fake mega-disk */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync};
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsynctypedef struct {
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t type; /* Drive type. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync uint8_t dpt_entry; /* Index of entry in fd_parm. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync} fd_map_entry;
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync/* Drive types as stored in the CMOS. Must match DevPCBios! */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define FDRV_360K 1
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define FDRV_1_2M 2
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define FDRV_720K 3
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define FDRV_1_44M 4
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define FDRV_2_88M 5
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define FDRV_15M 14
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync#define FDRV_63M 15
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync/* A table mapping (CMOS) drive types to DPT entries. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsyncfd_map_entry fd_map[] = {
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync { FDRV_360K, 0 },
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync { FDRV_1_2M, 2 },
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync { FDRV_720K, 3 },
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync { FDRV_1_44M, 4 },
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync { FDRV_2_88M, 5 },
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync { FDRV_15M, 6 },
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync { FDRV_63M, 6 }
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync};
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync/* Find a DPT corresponding to the given drive type. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsyncdpt_ext *get_floppy_dpt(uint8_t drv_typ)
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync{
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync int i;
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync for (i = 0; i < sizeof(fd_map) / sizeof(fd_map[0]); ++i)
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync if (fd_map[i].type == drv_typ)
578a7a6fcb6740427a8f1bfab2abd5422e5be164vboxsync return &fd_parm[fd_map[i].dpt_entry];
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync /* As a fallback, return the 1.44M DPT. */
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync return &fd_parm[5];
a0740109167815238b0fd97c2131de135e2f5b2bvboxsync}