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/*
* QEMU Floppy disk emulator (Intel 82078)
*
* Copyright (c) 2003, 2007 Jocelyn Mayer
* Copyright (c) 2008 Hervé Poussineau
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef HW_BLOCK_FDC_INTERNAL_H
#define HW_BLOCK_FDC_INTERNAL_H
#include "hw/block/block.h"
#include "hw/block/fdc.h"
#include "qapi/qapi-types-block.h"
typedef struct FDCtrl FDCtrl;
/* Floppy bus emulation */
typedef struct FloppyBus {
BusState bus;
FDCtrl *fdc;
} FloppyBus;
/* Floppy disk drive emulation */
typedef enum FDriveRate {
FDRIVE_RATE_500K = 0x00, /* 500 Kbps */
FDRIVE_RATE_300K = 0x01, /* 300 Kbps */
FDRIVE_RATE_250K = 0x02, /* 250 Kbps */
FDRIVE_RATE_1M = 0x03, /* 1 Mbps */
} FDriveRate;
typedef enum FDriveSize {
FDRIVE_SIZE_UNKNOWN,
FDRIVE_SIZE_350,
FDRIVE_SIZE_525,
} FDriveSize;
typedef struct FDFormat {
FloppyDriveType drive;
uint8_t last_sect;
uint8_t max_track;
uint8_t max_head;
FDriveRate rate;
} FDFormat;
typedef enum FDiskFlags {
FDISK_DBL_SIDES = 0x01,
} FDiskFlags;
typedef struct FDrive {
FDCtrl *fdctrl;
BlockBackend *blk;
BlockConf *conf;
/* Drive status */
FloppyDriveType drive; /* CMOS drive type */
uint8_t perpendicular; /* 2.88 MB access mode */
/* Position */
uint8_t head;
uint8_t track;
uint8_t sect;
/* Media */
FloppyDriveType disk; /* Current disk type */
FDiskFlags flags;
uint8_t last_sect; /* Nb sector per track */
uint8_t max_track; /* Nb of tracks */
uint16_t bps; /* Bytes per sector */
uint8_t ro; /* Is read-only */
uint8_t media_changed; /* Is media changed */
uint8_t media_rate; /* Data rate of medium */
bool media_validated; /* Have we validated the media? */
} FDrive;
struct FDCtrl {
qemu_irq irq;
/* Controller state */
QEMUTimer *result_timer;
int dma_chann;
uint8_t phase;
IsaDma *dma;
/* Controller's identification */
uint8_t version;
/* HW */
uint8_t sra;
uint8_t srb;
uint8_t dor;
uint8_t dor_vmstate; /* only used as temp during vmstate */
uint8_t tdr;
uint8_t dsr;
uint8_t msr;
uint8_t cur_drv;
uint8_t status0;
uint8_t status1;
uint8_t status2;
/* Command FIFO */
uint8_t *fifo;
int32_t fifo_size;
uint32_t data_pos;
uint32_t data_len;
uint8_t data_state;
uint8_t data_dir;
uint8_t eot; /* last wanted sector */
/* States kept only to be returned back */
/* precompensation */
uint8_t precomp_trk;
uint8_t config;
uint8_t lock;
/* Power down config (also with status regB access mode */
uint8_t pwrd;
/* Floppy drives */
FloppyBus bus;
uint8_t num_floppies;
FDrive drives[MAX_FD];
struct {
FloppyDriveType type;
} qdev_for_drives[MAX_FD];
int reset_sensei;
FloppyDriveType fallback; /* type=auto failure fallback */
/* Timers state */
uint8_t timer0;
uint8_t timer1;
};
extern const FDFormat fd_formats[];
extern const VMStateDescription vmstate_fdc;
uint32_t fdctrl_read(void *opaque, uint32_t reg);
void fdctrl_write(void *opaque, uint32_t reg, uint32_t value);
void fdctrl_reset(FDCtrl *fdctrl, int do_irq);
void fdctrl_realize_common(DeviceState *dev, FDCtrl *fdctrl, Error **errp);
int fdctrl_transfer_handler(void *opaque, int nchan, int dma_pos, int dma_len);
void fdctrl_init_drives(FloppyBus *bus, DriveInfo **fds);
#endif