LXR qemu/hw/block/fdc-internal.h

   1/*
   2 * QEMU Floppy disk emulator (Intel 82078)
   3 *
   4 * Copyright (c) 2003, 2007 Jocelyn Mayer
   5 * Copyright (c) 2008 Hervé Poussineau
   6 *
   7 * Permission is hereby granted, free of charge, to any person obtaining a copy
   8 * of this software and associated documentation files (the "Software"), to deal
   9 * in the Software without restriction, including without limitation the rights
  10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11 * copies of the Software, and to permit persons to whom the Software is
  12 * furnished to do so, subject to the following conditions:
  13 *
  14 * The above copyright notice and this permission notice shall be included in
  15 * all copies or substantial portions of the Software.
  16 *
  17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23 * THE SOFTWARE.
  24 */
  25#ifndef HW_BLOCK_FDC_INTERNAL_H
  26#define HW_BLOCK_FDC_INTERNAL_H
  27
  28#include "exec/memory.h"
  29#include "exec/ioport.h"
  30#include "hw/block/block.h"
  31#include "hw/block/fdc.h"
  32#include "qapi/qapi-types-block.h"
  33
  34typedef struct FDCtrl FDCtrl;
  35
  36/* Floppy bus emulation */
  37
  38typedef struct FloppyBus {
  39    BusState bus;
  40    FDCtrl *fdc;
  41} FloppyBus;
  42
  43/* Floppy disk drive emulation */
  44
  45typedef enum FDriveRate {
  46    FDRIVE_RATE_500K = 0x00,  /* 500 Kbps */
  47    FDRIVE_RATE_300K = 0x01,  /* 300 Kbps */
  48    FDRIVE_RATE_250K = 0x02,  /* 250 Kbps */
  49    FDRIVE_RATE_1M   = 0x03,  /*   1 Mbps */
  50} FDriveRate;
  51
  52typedef enum FDriveSize {
  53    FDRIVE_SIZE_UNKNOWN,
  54    FDRIVE_SIZE_350,
  55    FDRIVE_SIZE_525,
  56} FDriveSize;
  57
  58typedef struct FDFormat {
  59    FloppyDriveType drive;
  60    uint8_t last_sect;
  61    uint8_t max_track;
  62    uint8_t max_head;
  63    FDriveRate rate;
  64} FDFormat;
  65
  66typedef enum FDiskFlags {
  67    FDISK_DBL_SIDES  = 0x01,
  68} FDiskFlags;
  69
  70typedef struct FDrive {
  71    FDCtrl *fdctrl;
  72    BlockBackend *blk;
  73    BlockConf *conf;
  74    /* Drive status */
  75    FloppyDriveType drive;    /* CMOS drive type        */
  76    uint8_t perpendicular;    /* 2.88 MB access mode    */
  77    /* Position */
  78    uint8_t head;
  79    uint8_t track;
  80    uint8_t sect;
  81    /* Media */
  82    FloppyDriveType disk;     /* Current disk type      */
  83    FDiskFlags flags;
  84    uint8_t last_sect;        /* Nb sector per track    */
  85    uint8_t max_track;        /* Nb of tracks           */
  86    uint16_t bps;             /* Bytes per sector       */
  87    uint8_t ro;               /* Is read-only           */
  88    uint8_t media_changed;    /* Is media changed       */
  89    uint8_t media_rate;       /* Data rate of medium    */
  90
  91    bool media_validated;     /* Have we validated the media? */
  92} FDrive;
  93
  94struct FDCtrl {
  95    MemoryRegion iomem;
  96    qemu_irq irq;
  97    /* Controller state */
  98    QEMUTimer *result_timer;
  99    int dma_chann;
 100    uint8_t phase;
 101    IsaDma *dma;
 102    /* Controller's identification */
 103    uint8_t version;
 104    /* HW */
 105    uint8_t sra;
 106    uint8_t srb;
 107    uint8_t dor;
 108    uint8_t dor_vmstate; /* only used as temp during vmstate */
 109    uint8_t tdr;
 110    uint8_t dsr;
 111    uint8_t msr;
 112    uint8_t cur_drv;
 113    uint8_t status0;
 114    uint8_t status1;
 115    uint8_t status2;
 116    /* Command FIFO */
 117    uint8_t *fifo;
 118    int32_t fifo_size;
 119    uint32_t data_pos;
 120    uint32_t data_len;
 121    uint8_t data_state;
 122    uint8_t data_dir;
 123    uint8_t eot; /* last wanted sector */
 124    /* States kept only to be returned back */
 125    /* precompensation */
 126    uint8_t precomp_trk;
 127    uint8_t config;
 128    uint8_t lock;
 129    /* Power down config (also with status regB access mode */
 130    uint8_t pwrd;
 131    /* Floppy drives */
 132    FloppyBus bus;
 133    uint8_t num_floppies;
 134    FDrive drives[MAX_FD];
 135    struct {
 136        FloppyDriveType type;
 137    } qdev_for_drives[MAX_FD];
 138    int reset_sensei;
 139    FloppyDriveType fallback; /* type=auto failure fallback */
 140    /* Timers state */
 141    uint8_t timer0;
 142    uint8_t timer1;
 143    PortioList portio_list;
 144};
 145
 146extern const FDFormat fd_formats[];
 147extern const VMStateDescription vmstate_fdc;
 148
 149uint32_t fdctrl_read(void *opaque, uint32_t reg);
 150void fdctrl_write(void *opaque, uint32_t reg, uint32_t value);
 151void fdctrl_reset(FDCtrl *fdctrl, int do_irq);
 152void fdctrl_realize_common(DeviceState *dev, FDCtrl *fdctrl, Error **errp);
 153
 154int fdctrl_transfer_handler(void *opaque, int nchan, int dma_pos, int dma_len);
 155
 156void fdctrl_init_drives(FloppyBus *bus, DriveInfo **fds);
 157
 158#endif
 159