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