caed880216
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@659 c046a42c-6fe2-441c-8c8c-71466251a162
1426 lines
46 KiB
C
1426 lines
46 KiB
C
/*
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* QEMU Floppy disk emulator
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*
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* Copyright (c) 2003 Jocelyn Mayer
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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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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include "vl.h"
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/********************************************************/
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/* debug Floppy devices */
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//#define DEBUG_FLOPPY
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#ifdef DEBUG_FLOPPY
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#define FLOPPY_DPRINTF(fmt, args...) \
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do { printf("FLOPPY: " fmt , ##args); } while (0)
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#else
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#define FLOPPY_DPRINTF(fmt, args...)
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#endif
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#define FLOPPY_ERROR(fmt, args...) \
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do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0)
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/********************************************************/
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/* Floppy drive emulation */
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/* Will always be a fixed parameter for us */
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#define FD_SECTOR_LEN 512
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#define FD_SECTOR_SC 2 /* Sector size code */
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/* Floppy disk drive emulation */
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typedef enum fdisk_type_t {
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FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */
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FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */
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FDRIVE_DISK_720 = 0x03, /* 720 kB disk */
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FDRIVE_DISK_NONE = 0x04, /* No disk */
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} fdisk_type_t;
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typedef enum fdrive_type_t {
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FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */
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FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */
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FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */
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FDRIVE_DRV_NONE = 0x03, /* No drive connected */
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} fdrive_type_t;
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typedef struct fdrive_t {
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BlockDriverState *bs;
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/* Drive status */
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fdrive_type_t drive;
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uint8_t motor; /* on/off */
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uint8_t perpendicular; /* 2.88 MB access mode */
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uint8_t rv; /* Revalidated */
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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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/* Last operation status */
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uint8_t dir; /* Direction */
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uint8_t rw; /* Read/write */
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/* Media */
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fdisk_type_t disk; /* Disk type */
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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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uint8_t ro; /* Is read-only */
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} fdrive_t;
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static void fd_init (fdrive_t *drv, BlockDriverState *bs)
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{
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/* Drive */
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drv->bs = bs;
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if (bs)
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drv->drive = FDRIVE_DRV_144;
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else
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drv->drive = FDRIVE_DRV_NONE;
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drv->motor = 0;
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drv->perpendicular = 0;
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drv->rv = 0;
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/* Disk */
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drv->disk = FDRIVE_DISK_NONE;
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drv->last_sect = 1;
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drv->max_track = 0;
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}
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static int _fd_sector (uint8_t head, uint8_t track,
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uint8_t sect, uint8_t last_sect)
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{
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return (((track * 2) + head) * last_sect) + sect - 1;
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}
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/* Returns current position, in sectors, for given drive */
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static int fd_sector (fdrive_t *drv)
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{
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return _fd_sector(drv->head, drv->track, drv->sect, drv->last_sect);
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}
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static int fd_seek (fdrive_t *drv, uint8_t head, uint8_t track, uint8_t sect,
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int enable_seek)
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{
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uint32_t sector;
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if (track > drv->max_track) {
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FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n",
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head, track, sect, 1, drv->max_track, drv->last_sect);
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return 2;
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}
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if (sect > drv->last_sect) {
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FLOPPY_ERROR("try to read %d %02x %02x (max=%d %02x %02x)\n",
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head, track, sect, 1, drv->max_track, drv->last_sect);
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return 3;
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}
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sector = _fd_sector(head, track, sect, drv->last_sect);
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if (sector != fd_sector(drv)) {
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#if 0
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if (!enable_seek) {
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FLOPPY_ERROR("no implicit seek %d %02x %02x (max=%d %02x %02x)\n",
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head, track, sect, 1, drv->max_track, drv->last_sect);
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return 4;
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}
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#endif
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drv->head = head;
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drv->track = track;
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drv->sect = sect;
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return 1;
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}
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return 0;
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}
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/* Set drive back to track 0 */
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static void fd_recalibrate (fdrive_t *drv)
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{
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FLOPPY_DPRINTF("recalibrate\n");
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drv->head = 0;
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drv->track = 0;
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drv->sect = 1;
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drv->dir = 1;
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drv->rw = 0;
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}
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/* Revalidate a disk drive after a disk change */
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static void fd_revalidate (fdrive_t *drv)
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{
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int64_t nb_sectors;
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FLOPPY_DPRINTF("revalidate\n");
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drv->rv = 0;
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/* if no drive present, cannot do more */
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if (!drv->bs)
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return;
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if (bdrv_is_inserted(drv->bs)) {
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bdrv_get_geometry(drv->bs, &nb_sectors);
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#if 1
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if (nb_sectors > 2880)
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#endif
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{
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/* Pretend we have a 2.88 MB disk */
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drv->disk = FDRIVE_DISK_288;
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drv->last_sect = 36;
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drv->max_track = 80;
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#if 1
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} else if (nb_sectors > 1440) {
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/* Pretend we have a 1.44 MB disk */
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drv->disk = FDRIVE_DISK_144;
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drv->last_sect = 18;
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drv->max_track = 80;
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} else {
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/* Pretend we have a 720 kB disk */
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drv->disk = FDRIVE_DISK_720;
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drv->last_sect = 9;
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drv->max_track = 80;
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#endif
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}
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drv->ro = bdrv_is_read_only(drv->bs);
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} else {
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drv->disk = FDRIVE_DISK_NONE;
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drv->last_sect = 1; /* Avoid eventual divide by 0 bugs */
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drv->ro = 0;
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}
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drv->rv = 1;
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}
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static void fd_change_cb (void *opaque)
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{
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fdrive_t *drv = opaque;
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fd_revalidate(drv);
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}
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/* Motor control */
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static void fd_start (fdrive_t *drv)
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{
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drv->motor = 1;
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}
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static void fd_stop (fdrive_t *drv)
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{
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drv->motor = 0;
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}
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/* Re-initialise a drives (motor off, repositioned) */
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static void fd_reset (fdrive_t *drv)
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{
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fd_stop(drv);
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fd_recalibrate(drv);
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}
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/********************************************************/
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/* Intel 82078 floppy disk controler emulation */
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static void fdctrl_reset (int do_irq);
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static void fdctrl_reset_fifo (void);
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static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size);
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static void fdctrl_raise_irq (uint8_t status);
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static uint32_t fdctrl_read_statusB (void *opaque, uint32_t reg);
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static uint32_t fdctrl_read_dor (void *opaque, uint32_t reg);
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static void fdctrl_write_dor (void *opaque, uint32_t reg, uint32_t value);
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static uint32_t fdctrl_read_tape (void *opaque, uint32_t reg);
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static void fdctrl_write_tape (void *opaque, uint32_t reg, uint32_t value);
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static uint32_t fdctrl_read_main_status (void *opaque, uint32_t reg);
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static void fdctrl_write_rate (void *opaque, uint32_t reg, uint32_t value);
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static uint32_t fdctrl_read_data (void *opaque, uint32_t reg);
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static void fdctrl_write_data (void *opaque, uint32_t reg, uint32_t value);
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static uint32_t fdctrl_read_dir (void *opaque, uint32_t reg);
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enum {
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FD_CTRL_ACTIVE = 0x01,
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FD_CTRL_RESET = 0x02,
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FD_CTRL_SLEEP = 0x04,
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FD_CTRL_BUSY = 0x08,
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FD_CTRL_INTR = 0x10,
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};
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enum {
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FD_DIR_WRITE = 0,
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FD_DIR_READ = 1,
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FD_DIR_SCANE = 2,
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FD_DIR_SCANL = 3,
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FD_DIR_SCANH = 4,
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};
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enum {
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FD_STATE_CMD = 0x00,
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FD_STATE_STATUS = 0x01,
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FD_STATE_DATA = 0x02,
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FD_STATE_STATE = 0x03,
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FD_STATE_MULTI = 0x10,
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FD_STATE_SEEK = 0x20,
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};
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#define FD_STATE(state) ((state) & FD_STATE_STATE)
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#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
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#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
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typedef struct fdctrl_t {
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/* Controler's identification */
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uint8_t version;
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/* HW */
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int irq_lvl;
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int dma_chann;
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/* Controler state */
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uint8_t state;
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uint8_t dma_en;
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uint8_t cur_drv;
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uint8_t bootsel;
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/* Command FIFO */
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uint8_t fifo[FD_SECTOR_LEN];
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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 int_status;
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/* States kept only to be returned back */
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/* Timers state */
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uint8_t timer0;
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uint8_t timer1;
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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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fdrive_t drives[2];
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} fdctrl_t;
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static fdctrl_t fdctrl;
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void fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped, uint32_t base,
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BlockDriverState **fds)
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{
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// int io_mem;
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int i;
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FLOPPY_DPRINTF("init controler\n");
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memset(&fdctrl, 0, sizeof(fdctrl));
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fdctrl.version = 0x90; /* Intel 82078 controler */
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fdctrl.irq_lvl = irq_lvl;
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fdctrl.dma_chann = dma_chann;
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fdctrl.config = 0x40; /* Implicit seek, polling & FIFO enabled */
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if (fdctrl.dma_chann != -1) {
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fdctrl.dma_en = 1;
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DMA_register_channel(dma_chann, fdctrl_transfer_handler, &fdctrl);
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} else {
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fdctrl.dma_en = 0;
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}
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for (i = 0; i < MAX_FD; i++) {
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fd_init(&fdctrl.drives[i], fds[i]);
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if (fds[i])
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bdrv_set_change_cb(fds[i], fd_change_cb, &fdctrl.drives[i]);
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}
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fdctrl_reset(0);
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fdctrl.state = FD_CTRL_ACTIVE;
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if (mem_mapped) {
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FLOPPY_ERROR("memory mapped floppy not supported by now !\n");
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#if 0
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io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write);
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cpu_register_physical_memory(base, 0x08, io_mem);
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#endif
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} else {
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register_ioport_read(base + 0x01, 1, 1, fdctrl_read_statusB, NULL);
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register_ioport_read(base + 0x02, 1, 1, fdctrl_read_dor, NULL);
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register_ioport_write(base + 0x02, 1, 1, fdctrl_write_dor, NULL);
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register_ioport_read(base + 0x03, 1, 1, fdctrl_read_tape, NULL);
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register_ioport_write(base + 0x03, 1, 1, fdctrl_write_tape, NULL);
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register_ioport_read(base + 0x04, 1, 1, fdctrl_read_main_status, NULL);
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register_ioport_write(base + 0x04, 1, 1, fdctrl_write_rate, NULL);
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register_ioport_read(base + 0x05, 1, 1, fdctrl_read_data, NULL);
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register_ioport_write(base + 0x05, 1, 1, fdctrl_write_data, NULL);
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register_ioport_read(base + 0x07, 1, 1, fdctrl_read_dir, NULL);
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}
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fdctrl.bootsel = 0;
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for (i = 0; i < MAX_FD; i++) {
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fd_revalidate(&fdctrl.drives[i]);
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}
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}
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int fdctrl_get_drive_type(int drive_num)
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{
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return fdctrl.drives[drive_num].drive;
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}
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/* Change IRQ state */
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static void fdctrl_reset_irq (void)
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{
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if (fdctrl.state & FD_CTRL_INTR) {
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pic_set_irq(fdctrl.irq_lvl, 0);
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fdctrl.state &= ~(FD_CTRL_INTR | FD_CTRL_SLEEP | FD_CTRL_BUSY);
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}
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}
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static void fdctrl_raise_irq (uint8_t status)
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{
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if (~(fdctrl.state & FD_CTRL_INTR)) {
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pic_set_irq(fdctrl.irq_lvl, 1);
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fdctrl.state |= FD_CTRL_INTR;
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}
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FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
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fdctrl.int_status = status;
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}
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/* Reset controler */
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static void fdctrl_reset (int do_irq)
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{
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int i;
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FLOPPY_DPRINTF("reset controler\n");
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fdctrl_reset_irq();
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/* Initialise controler */
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fdctrl.cur_drv = 0;
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/* FIFO state */
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fdctrl.data_pos = 0;
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fdctrl.data_len = 0;
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fdctrl.data_state = FD_STATE_CMD;
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fdctrl.data_dir = FD_DIR_WRITE;
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for (i = 0; i < MAX_FD; i++)
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fd_reset(&fdctrl.drives[i]);
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fdctrl_reset_fifo();
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if (do_irq)
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fdctrl_raise_irq(0x20);
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}
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/* Status B register : 0x01 (read-only) */
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static uint32_t fdctrl_read_statusB (void *opaque, uint32_t reg)
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{
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fdctrl_reset_irq();
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FLOPPY_DPRINTF("status register: 0x00\n");
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return 0;
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}
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/* Digital output register : 0x02 */
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static uint32_t fdctrl_read_dor (void *opaque, uint32_t reg)
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{
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fdrive_t *cur_drv, *drv0, *drv1;
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uint32_t retval = 0;
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drv0 = &fdctrl.drives[fdctrl.bootsel];
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drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
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cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
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/* Drive motors state indicators */
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retval |= drv1->motor << 5;
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retval |= drv0->motor << 4;
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/* DMA enable */
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retval |= fdctrl.dma_en << 3;
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/* Reset indicator */
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retval |= (fdctrl.state & FD_CTRL_RESET) == 0 ? 0x04 : 0;
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/* Selected drive */
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retval |= fdctrl.cur_drv;
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FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
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return retval;
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}
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static void fdctrl_write_dor (void *opaque, uint32_t reg, uint32_t value)
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{
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fdrive_t *drv0, *drv1;
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fdctrl_reset_irq();
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drv0 = &fdctrl.drives[fdctrl.bootsel];
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drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
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/* Reset mode */
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if (fdctrl.state & FD_CTRL_RESET) {
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if (!(value & 0x04)) {
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FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
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return;
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}
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}
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FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
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/* Drive motors state indicators */
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if (value & 0x20)
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fd_start(drv1);
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else
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fd_stop(drv1);
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if (value & 0x10)
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fd_start(drv0);
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else
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fd_stop(drv0);
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/* DMA enable */
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#if 0
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if (fdctrl.dma_chann != -1)
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fdctrl.dma_en = 1 - ((value >> 3) & 1);
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#endif
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/* Reset */
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if (!(value & 0x04)) {
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if (!(fdctrl.state & FD_CTRL_RESET)) {
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FLOPPY_DPRINTF("controler enter RESET state\n");
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fdctrl.state |= FD_CTRL_RESET;
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fdctrl_reset(1);
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}
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} else {
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if (fdctrl.state & FD_CTRL_RESET) {
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FLOPPY_DPRINTF("controler out of RESET state\n");
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fdctrl.state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP);
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}
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}
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/* Selected drive */
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fdctrl.cur_drv = value & 1;
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}
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|
|
/* Tape drive register : 0x03 */
|
|
static uint32_t fdctrl_read_tape (void *opaque, uint32_t reg)
|
|
{
|
|
uint32_t retval = 0;
|
|
|
|
fdctrl_reset_irq();
|
|
/* Disk boot selection indicator */
|
|
retval |= fdctrl.bootsel << 2;
|
|
/* Tape indicators: never allowed */
|
|
FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void fdctrl_write_tape (void *opaque, uint32_t reg, uint32_t value)
|
|
{
|
|
fdctrl_reset_irq();
|
|
/* Reset mode */
|
|
if (fdctrl.state & FD_CTRL_RESET) {
|
|
FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
|
|
return;
|
|
}
|
|
FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
|
|
/* Disk boot selection indicator */
|
|
fdctrl.bootsel = (value >> 2) & 1;
|
|
/* Tape indicators: never allow */
|
|
}
|
|
|
|
/* Main status register : 0x04 (read) */
|
|
static uint32_t fdctrl_read_main_status (void *opaque, uint32_t reg)
|
|
{
|
|
uint32_t retval = 0;
|
|
|
|
fdctrl_reset_irq();
|
|
fdctrl.state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET);
|
|
if (!(fdctrl.state & FD_CTRL_BUSY)) {
|
|
/* Data transfer allowed */
|
|
retval |= 0x80;
|
|
/* Data transfer direction indicator */
|
|
if (fdctrl.data_dir == FD_DIR_READ)
|
|
retval |= 0x40;
|
|
}
|
|
/* Should handle 0x20 for SPECIFY command */
|
|
/* Command busy indicator */
|
|
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA ||
|
|
FD_STATE(fdctrl.data_state) == FD_STATE_STATUS)
|
|
retval |= 0x10;
|
|
FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/* Data select rate register : 0x04 (write) */
|
|
static void fdctrl_write_rate (void *opaque, uint32_t reg, uint32_t value)
|
|
{
|
|
fdctrl_reset_irq();
|
|
/* Reset mode */
|
|
if (fdctrl.state & FD_CTRL_RESET) {
|
|
if (reg != 0x2 || !(value & 0x04)) {
|
|
FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
|
|
return;
|
|
}
|
|
}
|
|
FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
|
|
/* Reset: autoclear */
|
|
if (value & 0x80) {
|
|
fdctrl.state |= FD_CTRL_RESET;
|
|
fdctrl_reset(1);
|
|
fdctrl.state &= ~FD_CTRL_RESET;
|
|
}
|
|
if (value & 0x40) {
|
|
fdctrl.state |= FD_CTRL_SLEEP;
|
|
fdctrl_reset(1);
|
|
}
|
|
// fdctrl.precomp = (value >> 2) & 0x07;
|
|
}
|
|
|
|
/* Digital input register : 0x07 (read-only) */
|
|
static uint32_t fdctrl_read_dir (void *opaque, uint32_t reg)
|
|
{
|
|
fdrive_t *drv0, *drv1;
|
|
uint32_t retval = 0;
|
|
|
|
fdctrl_reset_irq();
|
|
drv0 = &fdctrl.drives[fdctrl.bootsel];
|
|
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
|
if (drv0->rv || drv1->rv)
|
|
retval |= 0x80;
|
|
if (retval != 0)
|
|
FLOPPY_ERROR("Floppy digital input register: 0x%02x\n", retval);
|
|
drv0->rv = 0;
|
|
drv1->rv = 0;
|
|
|
|
return retval;
|
|
}
|
|
|
|
/* FIFO state control */
|
|
static void fdctrl_reset_fifo (void)
|
|
{
|
|
fdctrl.data_dir = FD_DIR_WRITE;
|
|
fdctrl.data_pos = 0;
|
|
fdctrl.data_state = FD_STATE_CMD;
|
|
}
|
|
|
|
/* Set FIFO status for the host to read */
|
|
static void fdctrl_set_fifo (int fifo_len, int do_irq)
|
|
{
|
|
fdctrl.data_dir = FD_DIR_READ;
|
|
fdctrl.data_len = fifo_len;
|
|
fdctrl.data_pos = 0;
|
|
fdctrl.data_state = FD_STATE_STATUS;
|
|
if (do_irq)
|
|
fdctrl_raise_irq(0x00);
|
|
}
|
|
|
|
/* Set an error: unimplemented/unknown command */
|
|
static void fdctrl_unimplemented (void)
|
|
{
|
|
#if 0
|
|
fdrive_t *cur_drv, *drv0, *drv1;
|
|
|
|
drv0 = &fdctrl.drives[fdctrl.bootsel];
|
|
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
fdctrl.fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl.cur_drv;
|
|
fdctrl.fifo[1] = 0x00;
|
|
fdctrl.fifo[2] = 0x00;
|
|
fdctrl_set_fifo(3, 1);
|
|
#else
|
|
fdctrl_reset_fifo();
|
|
#endif
|
|
}
|
|
|
|
/* Callback for transfer end (stop or abort) */
|
|
static void fdctrl_stop_transfer (uint8_t status0, uint8_t status1,
|
|
uint8_t status2)
|
|
{
|
|
fdrive_t *cur_drv, *drv0, *drv1;
|
|
|
|
drv0 = &fdctrl.drives[fdctrl.bootsel];
|
|
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
|
|
status0, status1, status2,
|
|
status0 | (cur_drv->head << 1) | fdctrl.cur_drv);
|
|
fdctrl.fifo[0] = status0 | (cur_drv->head << 1) | fdctrl.cur_drv;
|
|
fdctrl.fifo[1] = status1;
|
|
fdctrl.fifo[2] = status2;
|
|
fdctrl.fifo[3] = cur_drv->track;
|
|
fdctrl.fifo[4] = cur_drv->head;
|
|
fdctrl.fifo[5] = cur_drv->sect;
|
|
fdctrl.fifo[6] = FD_SECTOR_SC;
|
|
fdctrl.data_dir = FD_DIR_READ;
|
|
if (fdctrl.state & FD_CTRL_BUSY)
|
|
DMA_release_DREQ(fdctrl.dma_chann);
|
|
fdctrl_set_fifo(7, 1);
|
|
}
|
|
|
|
/* Prepare a data transfer (either DMA or FIFO) */
|
|
static void fdctrl_start_transfer (int direction)
|
|
{
|
|
fdrive_t *cur_drv, *drv0, *drv1;
|
|
uint8_t kh, kt, ks;
|
|
int did_seek;
|
|
|
|
drv0 = &fdctrl.drives[fdctrl.bootsel];
|
|
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
|
fdctrl.cur_drv = fdctrl.fifo[1] & 1;
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
kt = fdctrl.fifo[2];
|
|
kh = fdctrl.fifo[3];
|
|
ks = fdctrl.fifo[4];
|
|
FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n",
|
|
fdctrl.cur_drv, kh, kt, ks,
|
|
_fd_sector(kh, kt, ks, cur_drv->last_sect));
|
|
did_seek = 0;
|
|
switch (fd_seek(cur_drv, kh, kt, ks, fdctrl.config & 0x40)) {
|
|
case 2:
|
|
/* sect too big */
|
|
fdctrl_stop_transfer(0x40, 0x00, 0x00);
|
|
fdctrl.fifo[3] = kt;
|
|
fdctrl.fifo[4] = kh;
|
|
fdctrl.fifo[5] = ks;
|
|
return;
|
|
case 3:
|
|
/* track too big */
|
|
fdctrl_stop_transfer(0x40, 0x80, 0x00);
|
|
fdctrl.fifo[3] = kt;
|
|
fdctrl.fifo[4] = kh;
|
|
fdctrl.fifo[5] = ks;
|
|
return;
|
|
case 4:
|
|
/* No seek enabled */
|
|
fdctrl_stop_transfer(0x40, 0x00, 0x00);
|
|
fdctrl.fifo[3] = kt;
|
|
fdctrl.fifo[4] = kh;
|
|
fdctrl.fifo[5] = ks;
|
|
return;
|
|
case 1:
|
|
did_seek = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
/* Set the FIFO state */
|
|
fdctrl.data_dir = direction;
|
|
fdctrl.data_pos = 0;
|
|
fdctrl.data_state = FD_STATE_DATA; /* FIFO ready for data */
|
|
if (fdctrl.fifo[0] & 0x80)
|
|
fdctrl.data_state |= FD_STATE_MULTI;
|
|
if (did_seek)
|
|
fdctrl.data_state |= FD_STATE_SEEK;
|
|
if (fdctrl.dma_en) {
|
|
int dma_mode;
|
|
/* DMA transfer are enabled. Check if DMA channel is well programmed */
|
|
dma_mode = DMA_get_channel_mode(fdctrl.dma_chann);
|
|
dma_mode = (dma_mode >> 2) & 3;
|
|
FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d)\n", dma_mode, direction,
|
|
(128 << fdctrl.fifo[5]) *
|
|
(cur_drv->last_sect - ks + 1));
|
|
if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
|
|
direction == FD_DIR_SCANH) && dma_mode == 0) ||
|
|
(direction == FD_DIR_WRITE && dma_mode == 2) ||
|
|
(direction == FD_DIR_READ && dma_mode == 1)) {
|
|
/* No access is allowed until DMA transfer has completed */
|
|
fdctrl.state |= FD_CTRL_BUSY;
|
|
/* Now, we just have to wait for the DMA controler to
|
|
* recall us...
|
|
*/
|
|
DMA_hold_DREQ(fdctrl.dma_chann);
|
|
DMA_schedule(fdctrl.dma_chann);
|
|
return;
|
|
}
|
|
}
|
|
FLOPPY_DPRINTF("start non-DMA transfer\n");
|
|
/* IO based transfer: calculate len */
|
|
if (fdctrl.fifo[5] == 00) {
|
|
fdctrl.data_len = fdctrl.fifo[8];
|
|
} else {
|
|
fdctrl.data_len = 128 << fdctrl.fifo[5];
|
|
fdctrl.data_len *= (cur_drv->last_sect - ks + 1);
|
|
if (fdctrl.fifo[0] & 0x80)
|
|
fdctrl.data_len *= 2;
|
|
}
|
|
fdctrl_raise_irq(0x00);
|
|
|
|
return;
|
|
}
|
|
|
|
/* Prepare a transfer of deleted data */
|
|
static void fdctrl_start_transfer_del (int direction)
|
|
{
|
|
/* We don't handle deleted data,
|
|
* so we don't return *ANYTHING*
|
|
*/
|
|
fdctrl_stop_transfer(0x60, 0x00, 0x00);
|
|
}
|
|
|
|
/* handlers for DMA transfers */
|
|
/* XXX: the partial transfer logic seems to be broken */
|
|
static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size)
|
|
{
|
|
fdrive_t *cur_drv, *drv0, *drv1;
|
|
int len;
|
|
uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00;
|
|
uint8_t tmpbuf[FD_SECTOR_LEN];
|
|
|
|
fdctrl_reset_irq();
|
|
if (!(fdctrl.state & FD_CTRL_BUSY)) {
|
|
FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
|
|
return 0;
|
|
}
|
|
drv0 = &fdctrl.drives[fdctrl.bootsel];
|
|
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
if (fdctrl.data_dir == FD_DIR_SCANE || fdctrl.data_dir == FD_DIR_SCANL ||
|
|
fdctrl.data_dir == FD_DIR_SCANH)
|
|
status2 = 0x04;
|
|
for (fdctrl.data_len = size; fdctrl.data_pos < fdctrl.data_len;
|
|
fdctrl.data_pos += len) {
|
|
len = size - fdctrl.data_pos;
|
|
if (len > FD_SECTOR_LEN)
|
|
len = FD_SECTOR_LEN;
|
|
FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
|
|
"(%d-0x%08x)\n", len, size, fdctrl.data_pos,
|
|
fdctrl.data_len, fdctrl.cur_drv, cur_drv->head,
|
|
cur_drv->track, cur_drv->sect, fd_sector(cur_drv),
|
|
fd_sector(cur_drv) * 512);
|
|
if (fdctrl.data_dir != FD_DIR_WRITE) {
|
|
/* READ & SCAN commands */
|
|
if (cur_drv->bs == NULL) {
|
|
fdctrl_stop_transfer(0x40, 0x00, 0x00);
|
|
goto transfer_error;
|
|
}
|
|
if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), tmpbuf, 1) < 0) {
|
|
FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
|
|
fd_sector(cur_drv));
|
|
/* Sure, image size is too small... */
|
|
memset(tmpbuf, 0, FD_SECTOR_LEN);
|
|
}
|
|
if (fdctrl.data_dir == FD_DIR_READ) {
|
|
cpu_physical_memory_write(addr + fdctrl.data_pos,
|
|
tmpbuf, len);
|
|
if (len < FD_SECTOR_LEN) {
|
|
memcpy(&fdctrl.fifo[0], tmpbuf + len, FD_SECTOR_LEN - len);
|
|
memset(&fdctrl.fifo[FD_SECTOR_LEN - len], 0, len);
|
|
}
|
|
} else {
|
|
int ret;
|
|
/* XXX: what to do if not enough data ? */
|
|
cpu_physical_memory_read(addr + fdctrl.data_pos,
|
|
fdctrl.fifo, len);
|
|
if (len < FD_SECTOR_LEN) {
|
|
memset(&fdctrl.fifo[len], 0, FD_SECTOR_LEN - len);
|
|
}
|
|
ret = memcmp(tmpbuf, fdctrl.fifo, FD_SECTOR_LEN);
|
|
if (ret == 0) {
|
|
status2 = 0x08;
|
|
goto end_transfer;
|
|
}
|
|
if ((ret < 0 && fdctrl.data_dir == FD_DIR_SCANL) ||
|
|
(ret > 0 && fdctrl.data_dir == FD_DIR_SCANH)) {
|
|
status2 = 0x00;
|
|
goto end_transfer;
|
|
}
|
|
}
|
|
} else {
|
|
/* WRITE commands */
|
|
cpu_physical_memory_read(addr + fdctrl.data_pos, tmpbuf, len);
|
|
if (len < FD_SECTOR_LEN) {
|
|
memset(tmpbuf + len, 0, FD_SECTOR_LEN - len);
|
|
}
|
|
if (cur_drv->bs == NULL ||
|
|
bdrv_write(cur_drv->bs, fd_sector(cur_drv), tmpbuf, 1) < 0) {
|
|
FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
|
|
fdctrl_stop_transfer(0x60, 0x00, 0x00);
|
|
goto transfer_error;
|
|
}
|
|
}
|
|
if (len == FD_SECTOR_LEN) {
|
|
/* Seek to next sector */
|
|
if (cur_drv->sect == cur_drv->last_sect) {
|
|
if (cur_drv->head == 0) {
|
|
cur_drv->head = 1;
|
|
} else {
|
|
cur_drv->track++;
|
|
cur_drv->head = 0;
|
|
}
|
|
cur_drv->sect = 1;
|
|
FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
|
|
cur_drv->head, cur_drv->track, cur_drv->sect,
|
|
fd_sector(cur_drv));
|
|
if (cur_drv->head == 0) {
|
|
FLOPPY_DPRINTF("end transfer\n");
|
|
goto end_transfer;
|
|
}
|
|
if (!FD_MULTI_TRACK(fdctrl.data_state)) {
|
|
/* Single track read */
|
|
FLOPPY_DPRINTF("single track transfert: end transfer\n");
|
|
// status1 |= 0x80;
|
|
goto end_transfer;
|
|
}
|
|
} else {
|
|
cur_drv->sect++;
|
|
FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
|
|
cur_drv->head, cur_drv->track, cur_drv->sect,
|
|
fd_sector(cur_drv));
|
|
}
|
|
}
|
|
}
|
|
end_transfer:
|
|
if (fdctrl.data_dir == FD_DIR_SCANE ||
|
|
fdctrl.data_dir == FD_DIR_SCANL ||
|
|
fdctrl.data_dir == FD_DIR_SCANH)
|
|
status2 = 0x08;
|
|
if (FD_DID_SEEK(fdctrl.data_state))
|
|
status0 |= 0x20;
|
|
fdctrl_stop_transfer(status0, status1, status2);
|
|
transfer_error:
|
|
|
|
return fdctrl.data_pos;
|
|
}
|
|
|
|
/* Data register : 0x05 */
|
|
static uint32_t fdctrl_read_data (void *opaque, uint32_t reg)
|
|
{
|
|
fdrive_t *cur_drv, *drv0, *drv1;
|
|
uint32_t retval = 0;
|
|
int pos, len;
|
|
|
|
fdctrl_reset_irq();
|
|
drv0 = &fdctrl.drives[fdctrl.bootsel];
|
|
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
fdctrl.state &= ~FD_CTRL_SLEEP;
|
|
if (FD_STATE(fdctrl.data_state) == FD_STATE_CMD) {
|
|
FLOPPY_ERROR("can't read data in CMD state\n");
|
|
return 0;
|
|
}
|
|
pos = fdctrl.data_pos;
|
|
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
|
|
pos %= FD_SECTOR_LEN;
|
|
if (pos == 0) {
|
|
len = fdctrl.data_len - fdctrl.data_pos;
|
|
if (len > FD_SECTOR_LEN)
|
|
len = FD_SECTOR_LEN;
|
|
bdrv_read(cur_drv->bs, fd_sector(cur_drv),
|
|
fdctrl.fifo, len);
|
|
}
|
|
}
|
|
retval = fdctrl.fifo[pos];
|
|
if (++fdctrl.data_pos == fdctrl.data_len) {
|
|
fdctrl.data_pos = 0;
|
|
/* Switch from transfert mode to status mode
|
|
* then from status mode to command mode
|
|
*/
|
|
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
|
|
fdctrl_stop_transfer(0x20, 0x00, 0x00);
|
|
else
|
|
fdctrl_reset_fifo();
|
|
}
|
|
FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void fdctrl_write_data (void *opaque, uint32_t reg, uint32_t value)
|
|
{
|
|
fdrive_t *cur_drv, *drv0, *drv1;
|
|
|
|
fdctrl_reset_irq();
|
|
drv0 = &fdctrl.drives[fdctrl.bootsel];
|
|
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
/* Reset mode */
|
|
if (fdctrl.state & FD_CTRL_RESET) {
|
|
FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
|
|
return;
|
|
}
|
|
fdctrl.state &= ~FD_CTRL_SLEEP;
|
|
if ((fdctrl.data_state & FD_STATE_STATE) == FD_STATE_STATUS) {
|
|
FLOPPY_ERROR("can't write data in status mode\n");
|
|
return;
|
|
}
|
|
/* Is it write command time ? */
|
|
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
|
|
/* FIFO data write */
|
|
fdctrl.fifo[fdctrl.data_pos++] = value;
|
|
if (fdctrl.data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) ||
|
|
fdctrl.data_pos == fdctrl.data_len) {
|
|
bdrv_write(cur_drv->bs, fd_sector(cur_drv),
|
|
fdctrl.fifo, FD_SECTOR_LEN);
|
|
}
|
|
/* Switch from transfert mode to status mode
|
|
* then from status mode to command mode
|
|
*/
|
|
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
|
|
fdctrl_stop_transfer(0x20, 0x00, 0x00);
|
|
return;
|
|
}
|
|
if (fdctrl.data_pos == 0) {
|
|
/* Command */
|
|
switch (value & 0x5F) {
|
|
case 0x46:
|
|
/* READ variants */
|
|
FLOPPY_DPRINTF("READ command\n");
|
|
/* 8 parameters cmd */
|
|
fdctrl.data_len = 9;
|
|
goto enqueue;
|
|
case 0x4C:
|
|
/* READ_DELETED variants */
|
|
FLOPPY_DPRINTF("READ_DELETED command\n");
|
|
/* 8 parameters cmd */
|
|
fdctrl.data_len = 9;
|
|
goto enqueue;
|
|
case 0x50:
|
|
/* SCAN_EQUAL variants */
|
|
FLOPPY_DPRINTF("SCAN_EQUAL command\n");
|
|
/* 8 parameters cmd */
|
|
fdctrl.data_len = 9;
|
|
goto enqueue;
|
|
case 0x56:
|
|
/* VERIFY variants */
|
|
FLOPPY_DPRINTF("VERIFY command\n");
|
|
/* 8 parameters cmd */
|
|
fdctrl.data_len = 9;
|
|
goto enqueue;
|
|
case 0x59:
|
|
/* SCAN_LOW_OR_EQUAL variants */
|
|
FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
|
|
/* 8 parameters cmd */
|
|
fdctrl.data_len = 9;
|
|
goto enqueue;
|
|
case 0x5D:
|
|
/* SCAN_HIGH_OR_EQUAL variants */
|
|
FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
|
|
/* 8 parameters cmd */
|
|
fdctrl.data_len = 9;
|
|
goto enqueue;
|
|
default:
|
|
break;
|
|
}
|
|
switch (value & 0x7F) {
|
|
case 0x45:
|
|
/* WRITE variants */
|
|
FLOPPY_DPRINTF("WRITE command\n");
|
|
/* 8 parameters cmd */
|
|
fdctrl.data_len = 9;
|
|
goto enqueue;
|
|
case 0x49:
|
|
/* WRITE_DELETED variants */
|
|
FLOPPY_DPRINTF("WRITE_DELETED command\n");
|
|
/* 8 parameters cmd */
|
|
fdctrl.data_len = 9;
|
|
goto enqueue;
|
|
default:
|
|
break;
|
|
}
|
|
switch (value) {
|
|
case 0x03:
|
|
/* SPECIFY */
|
|
FLOPPY_DPRINTF("SPECIFY command\n");
|
|
/* 1 parameter cmd */
|
|
fdctrl.data_len = 3;
|
|
goto enqueue;
|
|
case 0x04:
|
|
/* SENSE_DRIVE_STATUS */
|
|
FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
|
|
/* 1 parameter cmd */
|
|
fdctrl.data_len = 2;
|
|
goto enqueue;
|
|
case 0x07:
|
|
/* RECALIBRATE */
|
|
FLOPPY_DPRINTF("RECALIBRATE command\n");
|
|
/* 1 parameter cmd */
|
|
fdctrl.data_len = 2;
|
|
goto enqueue;
|
|
case 0x08:
|
|
/* SENSE_INTERRUPT_STATUS */
|
|
FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
|
|
fdctrl.int_status);
|
|
/* No parameters cmd: returns status if no interrupt */
|
|
fdctrl.fifo[0] =
|
|
fdctrl.int_status | (cur_drv->head << 2) | fdctrl.cur_drv;
|
|
fdctrl.fifo[1] = cur_drv->track;
|
|
fdctrl_set_fifo(2, 0);
|
|
return;
|
|
case 0x0E:
|
|
/* DUMPREG */
|
|
FLOPPY_DPRINTF("DUMPREG command\n");
|
|
/* Drives position */
|
|
fdctrl.fifo[0] = drv0->track;
|
|
fdctrl.fifo[1] = drv1->track;
|
|
fdctrl.fifo[2] = 0;
|
|
fdctrl.fifo[3] = 0;
|
|
/* timers */
|
|
fdctrl.fifo[4] = fdctrl.timer0;
|
|
fdctrl.fifo[5] = (fdctrl.timer1 << 1) | fdctrl.dma_en;
|
|
fdctrl.fifo[6] = cur_drv->last_sect;
|
|
fdctrl.fifo[7] = (fdctrl.lock << 7) |
|
|
(cur_drv->perpendicular << 2);
|
|
fdctrl.fifo[8] = fdctrl.config;
|
|
fdctrl.fifo[9] = fdctrl.precomp_trk;
|
|
fdctrl_set_fifo(10, 0);
|
|
return;
|
|
case 0x0F:
|
|
/* SEEK */
|
|
FLOPPY_DPRINTF("SEEK command\n");
|
|
/* 2 parameters cmd */
|
|
fdctrl.data_len = 3;
|
|
goto enqueue;
|
|
case 0x10:
|
|
/* VERSION */
|
|
FLOPPY_DPRINTF("VERSION command\n");
|
|
/* No parameters cmd */
|
|
/* Controler's version */
|
|
fdctrl.fifo[0] = fdctrl.version;
|
|
fdctrl_set_fifo(1, 1);
|
|
return;
|
|
case 0x12:
|
|
/* PERPENDICULAR_MODE */
|
|
FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
|
|
/* 1 parameter cmd */
|
|
fdctrl.data_len = 2;
|
|
goto enqueue;
|
|
case 0x13:
|
|
/* CONFIGURE */
|
|
FLOPPY_DPRINTF("CONFIGURE command\n");
|
|
/* 3 parameters cmd */
|
|
fdctrl.data_len = 4;
|
|
goto enqueue;
|
|
case 0x14:
|
|
/* UNLOCK */
|
|
FLOPPY_DPRINTF("UNLOCK command\n");
|
|
/* No parameters cmd */
|
|
fdctrl.lock = 0;
|
|
fdctrl.fifo[0] = 0;
|
|
fdctrl_set_fifo(1, 0);
|
|
return;
|
|
case 0x17:
|
|
/* POWERDOWN_MODE */
|
|
FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
|
|
/* 2 parameters cmd */
|
|
fdctrl.data_len = 3;
|
|
goto enqueue;
|
|
case 0x18:
|
|
/* PART_ID */
|
|
FLOPPY_DPRINTF("PART_ID command\n");
|
|
/* No parameters cmd */
|
|
fdctrl.fifo[0] = 0x41; /* Stepping 1 */
|
|
fdctrl_set_fifo(1, 0);
|
|
return;
|
|
case 0x2C:
|
|
/* SAVE */
|
|
FLOPPY_DPRINTF("SAVE command\n");
|
|
/* No parameters cmd */
|
|
fdctrl.fifo[0] = 0;
|
|
fdctrl.fifo[1] = 0;
|
|
/* Drives position */
|
|
fdctrl.fifo[2] = drv0->track;
|
|
fdctrl.fifo[3] = drv1->track;
|
|
fdctrl.fifo[4] = 0;
|
|
fdctrl.fifo[5] = 0;
|
|
/* timers */
|
|
fdctrl.fifo[6] = fdctrl.timer0;
|
|
fdctrl.fifo[7] = fdctrl.timer1;
|
|
fdctrl.fifo[8] = cur_drv->last_sect;
|
|
fdctrl.fifo[9] = (fdctrl.lock << 7) |
|
|
(cur_drv->perpendicular << 2);
|
|
fdctrl.fifo[10] = fdctrl.config;
|
|
fdctrl.fifo[11] = fdctrl.precomp_trk;
|
|
fdctrl.fifo[12] = fdctrl.pwrd;
|
|
fdctrl.fifo[13] = 0;
|
|
fdctrl.fifo[14] = 0;
|
|
fdctrl_set_fifo(15, 1);
|
|
return;
|
|
case 0x33:
|
|
/* OPTION */
|
|
FLOPPY_DPRINTF("OPTION command\n");
|
|
/* 1 parameter cmd */
|
|
fdctrl.data_len = 2;
|
|
goto enqueue;
|
|
case 0x42:
|
|
/* READ_TRACK */
|
|
FLOPPY_DPRINTF("READ_TRACK command\n");
|
|
/* 8 parameters cmd */
|
|
fdctrl.data_len = 9;
|
|
goto enqueue;
|
|
case 0x4A:
|
|
/* READ_ID */
|
|
FLOPPY_DPRINTF("READ_ID command\n");
|
|
/* 1 parameter cmd */
|
|
fdctrl.data_len = 2;
|
|
goto enqueue;
|
|
case 0x4C:
|
|
/* RESTORE */
|
|
FLOPPY_DPRINTF("RESTORE command\n");
|
|
/* 17 parameters cmd */
|
|
fdctrl.data_len = 18;
|
|
goto enqueue;
|
|
case 0x4D:
|
|
/* FORMAT_TRACK */
|
|
FLOPPY_DPRINTF("FORMAT_TRACK command\n");
|
|
/* 5 parameters cmd */
|
|
fdctrl.data_len = 9;
|
|
goto enqueue;
|
|
case 0x8E:
|
|
/* DRIVE_SPECIFICATION_COMMAND */
|
|
FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
|
|
/* 5 parameters cmd */
|
|
fdctrl.data_len = 6;
|
|
goto enqueue;
|
|
case 0x8F:
|
|
/* RELATIVE_SEEK_OUT */
|
|
FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
|
|
/* 2 parameters cmd */
|
|
fdctrl.data_len = 3;
|
|
goto enqueue;
|
|
case 0x94:
|
|
/* LOCK */
|
|
FLOPPY_DPRINTF("LOCK command\n");
|
|
/* No parameters cmd */
|
|
fdctrl.lock = 1;
|
|
fdctrl.fifo[0] = 0x10;
|
|
fdctrl_set_fifo(1, 1);
|
|
return;
|
|
case 0xCD:
|
|
/* FORMAT_AND_WRITE */
|
|
FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
|
|
/* 10 parameters cmd */
|
|
fdctrl.data_len = 11;
|
|
goto enqueue;
|
|
case 0xCF:
|
|
/* RELATIVE_SEEK_IN */
|
|
FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
|
|
/* 2 parameters cmd */
|
|
fdctrl.data_len = 3;
|
|
goto enqueue;
|
|
default:
|
|
/* Unknown command */
|
|
FLOPPY_ERROR("unknown command: 0x%02x\n", value);
|
|
fdctrl_unimplemented();
|
|
return;
|
|
}
|
|
}
|
|
enqueue:
|
|
fdctrl.fifo[fdctrl.data_pos] = value;
|
|
if (++fdctrl.data_pos == fdctrl.data_len) {
|
|
/* We now have all parameters
|
|
* and will be able to treat the command
|
|
*/
|
|
switch (fdctrl.fifo[0] & 0x1F) {
|
|
case 0x06:
|
|
{
|
|
/* READ variants */
|
|
FLOPPY_DPRINTF("treat READ command\n");
|
|
fdctrl_start_transfer(FD_DIR_READ);
|
|
return;
|
|
}
|
|
case 0x0C:
|
|
/* READ_DELETED variants */
|
|
// FLOPPY_DPRINTF("treat READ_DELETED command\n");
|
|
FLOPPY_ERROR("treat READ_DELETED command\n");
|
|
fdctrl_start_transfer_del(1);
|
|
return;
|
|
case 0x16:
|
|
/* VERIFY variants */
|
|
// FLOPPY_DPRINTF("treat VERIFY command\n");
|
|
FLOPPY_ERROR("treat VERIFY command\n");
|
|
fdctrl_stop_transfer(0x20, 0x00, 0x00);
|
|
return;
|
|
case 0x10:
|
|
/* SCAN_EQUAL variants */
|
|
// FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
|
|
FLOPPY_ERROR("treat SCAN_EQUAL command\n");
|
|
fdctrl_start_transfer(FD_DIR_SCANE);
|
|
return;
|
|
case 0x19:
|
|
/* SCAN_LOW_OR_EQUAL variants */
|
|
// FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
|
|
FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
|
|
fdctrl_start_transfer(FD_DIR_SCANL);
|
|
return;
|
|
case 0x1D:
|
|
/* SCAN_HIGH_OR_EQUAL variants */
|
|
// FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
|
|
FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
|
|
fdctrl_start_transfer(FD_DIR_SCANH);
|
|
return;
|
|
default:
|
|
break;
|
|
}
|
|
switch (fdctrl.fifo[0] & 0x3F) {
|
|
case 0x05:
|
|
/* WRITE variants */
|
|
FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl.fifo[0]);
|
|
fdctrl_start_transfer(FD_DIR_WRITE);
|
|
return;
|
|
case 0x09:
|
|
/* WRITE_DELETED variants */
|
|
// FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
|
|
FLOPPY_ERROR("treat WRITE_DELETED command\n");
|
|
fdctrl_start_transfer_del(FD_DIR_WRITE);
|
|
return;
|
|
default:
|
|
break;
|
|
}
|
|
switch (fdctrl.fifo[0]) {
|
|
case 0x03:
|
|
/* SPECIFY */
|
|
FLOPPY_DPRINTF("treat SPECIFY command\n");
|
|
fdctrl.timer0 = (fdctrl.fifo[1] >> 4) & 0xF;
|
|
fdctrl.timer1 = fdctrl.fifo[1] >> 1;
|
|
/* No result back */
|
|
fdctrl_reset_fifo();
|
|
break;
|
|
case 0x04:
|
|
/* SENSE_DRIVE_STATUS */
|
|
FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
|
|
fdctrl.cur_drv = fdctrl.fifo[1] & 1;
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
|
|
/* 1 Byte status back */
|
|
fdctrl.fifo[0] = (cur_drv->ro << 6) |
|
|
(cur_drv->track == 0 ? 0x10 : 0x00) |
|
|
fdctrl.cur_drv;
|
|
fdctrl_set_fifo(1, 0);
|
|
break;
|
|
case 0x07:
|
|
/* RECALIBRATE */
|
|
FLOPPY_DPRINTF("treat RECALIBRATE command\n");
|
|
fdctrl.cur_drv = fdctrl.fifo[1] & 1;
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
fd_recalibrate(cur_drv);
|
|
fdctrl_reset_fifo();
|
|
/* Raise Interrupt */
|
|
fdctrl_raise_irq(0x20);
|
|
break;
|
|
case 0x0F:
|
|
/* SEEK */
|
|
FLOPPY_DPRINTF("treat SEEK command\n");
|
|
fdctrl.cur_drv = fdctrl.fifo[1] & 1;
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
if (fdctrl.fifo[2] <= cur_drv->track)
|
|
cur_drv->dir = 1;
|
|
else
|
|
cur_drv->dir = 0;
|
|
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
|
|
if (fdctrl.fifo[2] > cur_drv->max_track) {
|
|
fdctrl_raise_irq(0x60);
|
|
} else {
|
|
cur_drv->track = fdctrl.fifo[2];
|
|
fdctrl_reset_fifo();
|
|
/* Raise Interrupt */
|
|
fdctrl_raise_irq(0x20);
|
|
}
|
|
break;
|
|
case 0x12:
|
|
/* PERPENDICULAR_MODE */
|
|
FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
|
|
if (fdctrl.fifo[1] & 0x80)
|
|
cur_drv->perpendicular = fdctrl.fifo[1] & 0x7;
|
|
/* No result back */
|
|
fdctrl_reset_fifo();
|
|
break;
|
|
case 0x13:
|
|
/* CONFIGURE */
|
|
FLOPPY_DPRINTF("treat CONFIGURE command\n");
|
|
fdctrl.config = fdctrl.fifo[2];
|
|
fdctrl.precomp_trk = fdctrl.fifo[3];
|
|
/* No result back */
|
|
fdctrl_reset_fifo();
|
|
break;
|
|
case 0x17:
|
|
/* POWERDOWN_MODE */
|
|
FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
|
|
fdctrl.pwrd = fdctrl.fifo[1];
|
|
fdctrl.fifo[0] = fdctrl.fifo[1];
|
|
fdctrl_set_fifo(1, 1);
|
|
break;
|
|
case 0x33:
|
|
/* OPTION */
|
|
FLOPPY_DPRINTF("treat OPTION command\n");
|
|
/* No result back */
|
|
fdctrl_reset_fifo();
|
|
break;
|
|
case 0x42:
|
|
/* READ_TRACK */
|
|
// FLOPPY_DPRINTF("treat READ_TRACK command\n");
|
|
FLOPPY_ERROR("treat READ_TRACK command\n");
|
|
fdctrl_unimplemented();
|
|
break;
|
|
case 0x4A:
|
|
/* READ_ID */
|
|
// FLOPPY_DPRINTF("treat READ_ID command\n");
|
|
FLOPPY_ERROR("treat READ_ID command\n");
|
|
fdctrl_stop_transfer(0x00, 0x00, 0x00);
|
|
break;
|
|
case 0x4C:
|
|
/* RESTORE */
|
|
FLOPPY_DPRINTF("treat RESTORE command\n");
|
|
/* Drives position */
|
|
drv0->track = fdctrl.fifo[3];
|
|
drv1->track = fdctrl.fifo[4];
|
|
/* timers */
|
|
fdctrl.timer0 = fdctrl.fifo[7];
|
|
fdctrl.timer1 = fdctrl.fifo[8];
|
|
cur_drv->last_sect = fdctrl.fifo[9];
|
|
fdctrl.lock = fdctrl.fifo[10] >> 7;
|
|
cur_drv->perpendicular = (fdctrl.fifo[10] >> 2) & 0xF;
|
|
fdctrl.config = fdctrl.fifo[11];
|
|
fdctrl.precomp_trk = fdctrl.fifo[12];
|
|
fdctrl.pwrd = fdctrl.fifo[13];
|
|
fdctrl_reset_fifo();
|
|
break;
|
|
case 0x4D:
|
|
/* FORMAT_TRACK */
|
|
// FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
|
|
FLOPPY_ERROR("treat FORMAT_TRACK command\n");
|
|
fdctrl_unimplemented();
|
|
break;
|
|
case 0x8E:
|
|
/* DRIVE_SPECIFICATION_COMMAND */
|
|
FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
|
|
if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x80) {
|
|
/* Command parameters done */
|
|
if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x40) {
|
|
fdctrl.fifo[0] = fdctrl.fifo[1];
|
|
fdctrl.fifo[2] = 0;
|
|
fdctrl.fifo[3] = 0;
|
|
fdctrl_set_fifo(4, 1);
|
|
} else {
|
|
fdctrl_reset_fifo();
|
|
}
|
|
} else if (fdctrl.data_len > 7) {
|
|
/* ERROR */
|
|
fdctrl.fifo[0] = 0x80 |
|
|
(cur_drv->head << 2) | fdctrl.cur_drv;
|
|
fdctrl_set_fifo(1, 1);
|
|
}
|
|
break;
|
|
case 0x8F:
|
|
/* RELATIVE_SEEK_OUT */
|
|
FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
|
|
fdctrl.cur_drv = fdctrl.fifo[1] & 1;
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
|
|
if (fdctrl.fifo[2] + cur_drv->track > cur_drv->max_track) {
|
|
/* ERROR */
|
|
fdctrl_raise_irq(0x70);
|
|
} else {
|
|
cur_drv->track += fdctrl.fifo[2];
|
|
cur_drv->dir = 0;
|
|
fdctrl_reset_fifo();
|
|
fdctrl_raise_irq(0x20);
|
|
}
|
|
break;
|
|
case 0xCD:
|
|
/* FORMAT_AND_WRITE */
|
|
// FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
|
|
FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
|
|
fdctrl_unimplemented();
|
|
break;
|
|
case 0xCF:
|
|
/* RELATIVE_SEEK_IN */
|
|
FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
|
|
fdctrl.cur_drv = fdctrl.fifo[1] & 1;
|
|
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
|
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1;
|
|
if (fdctrl.fifo[2] > cur_drv->track) {
|
|
/* ERROR */
|
|
fdctrl_raise_irq(0x60);
|
|
} else {
|
|
fdctrl_reset_fifo();
|
|
cur_drv->track -= fdctrl.fifo[2];
|
|
cur_drv->dir = 1;
|
|
/* Raise Interrupt */
|
|
fdctrl_raise_irq(0x20);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|