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/*
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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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|
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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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|
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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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|
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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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|
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static void fd_init (fdrive_t *drv) |
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{
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/* Drive */
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drv->bs = NULL;
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// drv->drive = FDRIVE_DRV_288;
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drv->drive = FDRIVE_DRV_144; |
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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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|
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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, int ro) |
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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 (drv->bs != NULL) { |
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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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} 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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} |
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drv->ro = ro; |
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drv->rv = 1;
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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 (CPUState *env, uint32_t reg);
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static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg);
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static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value); |
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static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg);
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static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value); |
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static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg);
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static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value); |
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static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg);
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static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value); |
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static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg);
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|
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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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|
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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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|
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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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|
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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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|
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static fdctrl_t fdctrl;
|
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|
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void fdctrl_init (int irq_lvl, int dma_chann, int mem_mapped, uint32_t base, |
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char boot_device)
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{
|
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// int io_mem;
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int i;
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|
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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]); |
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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, fdctrl_read_statusB, 1); |
| 327 |
register_ioport_read(base + 0x02, 1, fdctrl_read_dor, 1); |
| 328 |
register_ioport_write(base + 0x02, 1, fdctrl_write_dor, 1); |
| 329 |
register_ioport_read(base + 0x03, 1, fdctrl_read_tape, 1); |
| 330 |
register_ioport_write(base + 0x03, 1, fdctrl_write_tape, 1); |
| 331 |
register_ioport_read(base + 0x04, 1, fdctrl_read_main_status, 1); |
| 332 |
register_ioport_write(base + 0x04, 1, fdctrl_write_rate, 1); |
| 333 |
register_ioport_read(base + 0x05, 1, fdctrl_read_data, 1); |
| 334 |
register_ioport_write(base + 0x05, 1, fdctrl_write_data, 1); |
| 335 |
register_ioport_read(base + 0x07, 1, fdctrl_read_dir, 1); |
| 336 |
} |
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if (boot_device == 'b') |
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fdctrl.bootsel = 1;
|
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else
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fdctrl.bootsel = 0;
|
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#if defined (TARGET_I386)
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cmos_register_fd(fdctrl.drives[0].drive, fdctrl.drives[1].drive); |
| 343 |
#endif
|
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} |
| 345 |
|
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int fdctrl_disk_change (int idx, const unsigned char *filename, int ro) |
| 347 |
{
|
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fdrive_t *drv; |
| 349 |
|
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if (idx < 0 || idx > 1) |
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return -1; |
| 352 |
FLOPPY_DPRINTF("disk %d change: %s (%s)\n", idx, filename,
|
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ro == 0 ? "rw" : "ro"); |
| 354 |
drv = &fdctrl.drives[idx]; |
| 355 |
if (fd_table[idx] != NULL) { |
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bdrv_close(fd_table[idx]); |
| 357 |
fd_table[idx] = NULL;
|
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} |
| 359 |
fd_table[idx] = bdrv_open(filename, ro); |
| 360 |
drv->bs = fd_table[idx]; |
| 361 |
if (fd_table[idx] == NULL) |
| 362 |
return -1; |
| 363 |
fd_revalidate(drv, ro); |
| 364 |
#if 0
|
| 365 |
fd_recalibrate(drv);
|
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fdctrl_reset_fifo();
|
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fdctrl_raise_irq(0x20);
|
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#endif
|
| 369 |
|
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return 0; |
| 371 |
} |
| 372 |
|
| 373 |
/* Change IRQ state */
|
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static void fdctrl_reset_irq (void) |
| 375 |
{
|
| 376 |
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); |
| 379 |
} |
| 380 |
} |
| 381 |
|
| 382 |
static void fdctrl_raise_irq (uint8_t status) |
| 383 |
{
|
| 384 |
if (~(fdctrl.state & FD_CTRL_INTR)) {
|
| 385 |
pic_set_irq(fdctrl.irq_lvl, 1);
|
| 386 |
fdctrl.state |= FD_CTRL_INTR; |
| 387 |
} |
| 388 |
FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
|
| 389 |
fdctrl.int_status = status; |
| 390 |
} |
| 391 |
|
| 392 |
/* Reset controler */
|
| 393 |
static void fdctrl_reset (int do_irq) |
| 394 |
{
|
| 395 |
int i;
|
| 396 |
|
| 397 |
FLOPPY_DPRINTF("reset controler\n");
|
| 398 |
fdctrl_reset_irq(); |
| 399 |
/* Initialise controler */
|
| 400 |
fdctrl.cur_drv = 0;
|
| 401 |
/* FIFO state */
|
| 402 |
fdctrl.data_pos = 0;
|
| 403 |
fdctrl.data_len = 0;
|
| 404 |
fdctrl.data_state = FD_STATE_CMD; |
| 405 |
fdctrl.data_dir = FD_DIR_WRITE; |
| 406 |
for (i = 0; i < MAX_FD; i++) |
| 407 |
fd_reset(&fdctrl.drives[i]); |
| 408 |
fdctrl_reset_fifo(); |
| 409 |
if (do_irq)
|
| 410 |
fdctrl_raise_irq(0x20);
|
| 411 |
} |
| 412 |
|
| 413 |
/* Status B register : 0x01 (read-only) */
|
| 414 |
static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg)
|
| 415 |
{
|
| 416 |
fdctrl_reset_irq(); |
| 417 |
FLOPPY_DPRINTF("status register: 0x00\n");
|
| 418 |
|
| 419 |
return 0; |
| 420 |
} |
| 421 |
|
| 422 |
/* Digital output register : 0x02 */
|
| 423 |
static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg)
|
| 424 |
{
|
| 425 |
fdrive_t *cur_drv, *drv0, *drv1; |
| 426 |
uint32_t retval = 0;
|
| 427 |
|
| 428 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| 429 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
| 430 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 431 |
/* Drive motors state indicators */
|
| 432 |
retval |= drv1->motor << 5;
|
| 433 |
retval |= drv0->motor << 4;
|
| 434 |
/* DMA enable */
|
| 435 |
retval |= fdctrl.dma_en << 3;
|
| 436 |
/* Reset indicator */
|
| 437 |
retval |= (fdctrl.state & FD_CTRL_RESET) == 0 ? 0x04 : 0; |
| 438 |
/* Selected drive */
|
| 439 |
retval |= fdctrl.cur_drv; |
| 440 |
FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
|
| 441 |
|
| 442 |
return retval;
|
| 443 |
} |
| 444 |
|
| 445 |
static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value) |
| 446 |
{
|
| 447 |
fdrive_t *drv0, *drv1; |
| 448 |
|
| 449 |
fdctrl_reset_irq(); |
| 450 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| 451 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
| 452 |
/* Reset mode */
|
| 453 |
if (fdctrl.state & FD_CTRL_RESET) {
|
| 454 |
if (!(value & 0x04)) { |
| 455 |
FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
|
| 456 |
return;
|
| 457 |
} |
| 458 |
} |
| 459 |
FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
|
| 460 |
/* Drive motors state indicators */
|
| 461 |
if (value & 0x20) |
| 462 |
fd_start(drv1); |
| 463 |
else
|
| 464 |
fd_stop(drv1); |
| 465 |
if (value & 0x10) |
| 466 |
fd_start(drv0); |
| 467 |
else
|
| 468 |
fd_stop(drv0); |
| 469 |
/* DMA enable */
|
| 470 |
#if 0
|
| 471 |
if (fdctrl.dma_chann != -1)
|
| 472 |
fdctrl.dma_en = 1 - ((value >> 3) & 1);
|
| 473 |
#endif
|
| 474 |
/* Reset */
|
| 475 |
if (!(value & 0x04)) { |
| 476 |
if (!(fdctrl.state & FD_CTRL_RESET)) {
|
| 477 |
FLOPPY_DPRINTF("controler enter RESET state\n");
|
| 478 |
fdctrl.state |= FD_CTRL_RESET; |
| 479 |
fdctrl_reset(1);
|
| 480 |
} |
| 481 |
} else {
|
| 482 |
if (fdctrl.state & FD_CTRL_RESET) {
|
| 483 |
FLOPPY_DPRINTF("controler out of RESET state\n");
|
| 484 |
fdctrl.state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP); |
| 485 |
} |
| 486 |
} |
| 487 |
/* Selected drive */
|
| 488 |
fdctrl.cur_drv = value & 1;
|
| 489 |
} |
| 490 |
|
| 491 |
/* Tape drive register : 0x03 */
|
| 492 |
static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg)
|
| 493 |
{
|
| 494 |
uint32_t retval = 0;
|
| 495 |
|
| 496 |
fdctrl_reset_irq(); |
| 497 |
/* Disk boot selection indicator */
|
| 498 |
retval |= fdctrl.bootsel << 2;
|
| 499 |
/* Tape indicators: never allowed */
|
| 500 |
FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
|
| 501 |
|
| 502 |
return retval;
|
| 503 |
} |
| 504 |
|
| 505 |
static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value) |
| 506 |
{
|
| 507 |
fdctrl_reset_irq(); |
| 508 |
/* Reset mode */
|
| 509 |
if (fdctrl.state & FD_CTRL_RESET) {
|
| 510 |
FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
|
| 511 |
return;
|
| 512 |
} |
| 513 |
FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
|
| 514 |
/* Disk boot selection indicator */
|
| 515 |
fdctrl.bootsel = (value >> 2) & 1; |
| 516 |
/* Tape indicators: never allow */
|
| 517 |
} |
| 518 |
|
| 519 |
/* Main status register : 0x04 (read) */
|
| 520 |
static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg)
|
| 521 |
{
|
| 522 |
uint32_t retval = 0;
|
| 523 |
|
| 524 |
fdctrl_reset_irq(); |
| 525 |
fdctrl.state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET); |
| 526 |
if (!(fdctrl.state & FD_CTRL_BUSY)) {
|
| 527 |
/* Data transfer allowed */
|
| 528 |
retval |= 0x80;
|
| 529 |
/* Data transfer direction indicator */
|
| 530 |
if (fdctrl.data_dir == FD_DIR_READ)
|
| 531 |
retval |= 0x40;
|
| 532 |
} |
| 533 |
/* Should handle 0x20 for SPECIFY command */
|
| 534 |
/* Command busy indicator */
|
| 535 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA ||
|
| 536 |
FD_STATE(fdctrl.data_state) == FD_STATE_STATUS) |
| 537 |
retval |= 0x10;
|
| 538 |
FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
|
| 539 |
|
| 540 |
return retval;
|
| 541 |
} |
| 542 |
|
| 543 |
/* Data select rate register : 0x04 (write) */
|
| 544 |
static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value) |
| 545 |
{
|
| 546 |
fdctrl_reset_irq(); |
| 547 |
/* Reset mode */
|
| 548 |
if (fdctrl.state & FD_CTRL_RESET) {
|
| 549 |
if (reg != 0x2 || !(value & 0x04)) { |
| 550 |
FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
|
| 551 |
return;
|
| 552 |
} |
| 553 |
} |
| 554 |
FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
|
| 555 |
/* Reset: autoclear */
|
| 556 |
if (value & 0x80) { |
| 557 |
fdctrl.state |= FD_CTRL_RESET; |
| 558 |
fdctrl_reset(1);
|
| 559 |
fdctrl.state &= ~FD_CTRL_RESET; |
| 560 |
} |
| 561 |
if (value & 0x40) { |
| 562 |
fdctrl.state |= FD_CTRL_SLEEP; |
| 563 |
fdctrl_reset(1);
|
| 564 |
} |
| 565 |
// fdctrl.precomp = (value >> 2) & 0x07;
|
| 566 |
} |
| 567 |
|
| 568 |
/* Digital input register : 0x07 (read-only) */
|
| 569 |
static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg)
|
| 570 |
{
|
| 571 |
fdrive_t *drv0, *drv1; |
| 572 |
uint32_t retval = 0;
|
| 573 |
|
| 574 |
fdctrl_reset_irq(); |
| 575 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| 576 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
| 577 |
if (drv0->rv || drv1->rv)
|
| 578 |
retval |= 0x80;
|
| 579 |
if (retval != 0) |
| 580 |
FLOPPY_ERROR("Floppy digital input register: 0x%02x\n", retval);
|
| 581 |
drv0->rv = 0;
|
| 582 |
drv1->rv = 0;
|
| 583 |
|
| 584 |
return retval;
|
| 585 |
} |
| 586 |
|
| 587 |
/* FIFO state control */
|
| 588 |
static void fdctrl_reset_fifo (void) |
| 589 |
{
|
| 590 |
fdctrl.data_dir = FD_DIR_WRITE; |
| 591 |
fdctrl.data_pos = 0;
|
| 592 |
fdctrl.data_state = FD_STATE_CMD; |
| 593 |
} |
| 594 |
|
| 595 |
/* Set FIFO status for the host to read */
|
| 596 |
static void fdctrl_set_fifo (int fifo_len, int do_irq) |
| 597 |
{
|
| 598 |
fdctrl.data_dir = FD_DIR_READ; |
| 599 |
fdctrl.data_len = fifo_len; |
| 600 |
fdctrl.data_pos = 0;
|
| 601 |
fdctrl.data_state = FD_STATE_STATUS; |
| 602 |
if (do_irq)
|
| 603 |
fdctrl_raise_irq(0x00);
|
| 604 |
} |
| 605 |
|
| 606 |
/* Set an error: unimplemented/unknown command */
|
| 607 |
static void fdctrl_unimplemented (void) |
| 608 |
{
|
| 609 |
#if 0
|
| 610 |
fdrive_t *cur_drv, *drv0, *drv1;
|
| 611 |
|
| 612 |
drv0 = &fdctrl.drives[fdctrl.bootsel];
|
| 613 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
| 614 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 615 |
fdctrl.fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl.cur_drv;
|
| 616 |
fdctrl.fifo[1] = 0x00;
|
| 617 |
fdctrl.fifo[2] = 0x00;
|
| 618 |
fdctrl_set_fifo(3, 1);
|
| 619 |
#else
|
| 620 |
fdctrl_reset_fifo(); |
| 621 |
#endif
|
| 622 |
} |
| 623 |
|
| 624 |
/* Callback for transfer end (stop or abort) */
|
| 625 |
static void fdctrl_stop_transfer (uint8_t status0, uint8_t status1, |
| 626 |
uint8_t status2) |
| 627 |
{
|
| 628 |
fdrive_t *cur_drv, *drv0, *drv1; |
| 629 |
|
| 630 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| 631 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
| 632 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 633 |
FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
|
| 634 |
status0, status1, status2, |
| 635 |
status0 | (cur_drv->head << 1) | fdctrl.cur_drv);
|
| 636 |
fdctrl.fifo[0] = status0 | (cur_drv->head << 1) | fdctrl.cur_drv; |
| 637 |
fdctrl.fifo[1] = status1;
|
| 638 |
fdctrl.fifo[2] = status2;
|
| 639 |
fdctrl.fifo[3] = cur_drv->track;
|
| 640 |
fdctrl.fifo[4] = cur_drv->head;
|
| 641 |
fdctrl.fifo[5] = cur_drv->sect;
|
| 642 |
fdctrl.fifo[6] = FD_SECTOR_SC;
|
| 643 |
fdctrl.data_dir = FD_DIR_READ; |
| 644 |
if (fdctrl.state & FD_CTRL_BUSY)
|
| 645 |
DMA_release_DREQ(fdctrl.dma_chann); |
| 646 |
fdctrl_set_fifo(7, 1); |
| 647 |
} |
| 648 |
|
| 649 |
/* Prepare a data transfer (either DMA or FIFO) */
|
| 650 |
static void fdctrl_start_transfer (int direction) |
| 651 |
{
|
| 652 |
fdrive_t *cur_drv, *drv0, *drv1; |
| 653 |
uint8_t kh, kt, ks; |
| 654 |
int did_seek;
|
| 655 |
|
| 656 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| 657 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
| 658 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| 659 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 660 |
kt = fdctrl.fifo[2];
|
| 661 |
kh = fdctrl.fifo[3];
|
| 662 |
ks = fdctrl.fifo[4];
|
| 663 |
FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n",
|
| 664 |
fdctrl.cur_drv, kh, kt, ks, |
| 665 |
_fd_sector(kh, kt, ks, cur_drv->last_sect)); |
| 666 |
did_seek = 0;
|
| 667 |
switch (fd_seek(cur_drv, kh, kt, ks, fdctrl.config & 0x40)) { |
| 668 |
case 2: |
| 669 |
/* sect too big */
|
| 670 |
fdctrl_stop_transfer(0x40, 0x00, 0x00); |
| 671 |
fdctrl.fifo[3] = kt;
|
| 672 |
fdctrl.fifo[4] = kh;
|
| 673 |
fdctrl.fifo[5] = ks;
|
| 674 |
return;
|
| 675 |
case 3: |
| 676 |
/* track too big */
|
| 677 |
fdctrl_stop_transfer(0x40, 0x80, 0x00); |
| 678 |
fdctrl.fifo[3] = kt;
|
| 679 |
fdctrl.fifo[4] = kh;
|
| 680 |
fdctrl.fifo[5] = ks;
|
| 681 |
return;
|
| 682 |
case 4: |
| 683 |
/* No seek enabled */
|
| 684 |
fdctrl_stop_transfer(0x40, 0x00, 0x00); |
| 685 |
fdctrl.fifo[3] = kt;
|
| 686 |
fdctrl.fifo[4] = kh;
|
| 687 |
fdctrl.fifo[5] = ks;
|
| 688 |
return;
|
| 689 |
case 1: |
| 690 |
did_seek = 1;
|
| 691 |
break;
|
| 692 |
default:
|
| 693 |
break;
|
| 694 |
} |
| 695 |
/* Set the FIFO state */
|
| 696 |
fdctrl.data_dir = direction; |
| 697 |
fdctrl.data_pos = 0;
|
| 698 |
fdctrl.data_state = FD_STATE_DATA; /* FIFO ready for data */
|
| 699 |
if (fdctrl.fifo[0] & 0x80) |
| 700 |
fdctrl.data_state |= FD_STATE_MULTI; |
| 701 |
if (did_seek)
|
| 702 |
fdctrl.data_state |= FD_STATE_SEEK; |
| 703 |
if (fdctrl.dma_en) {
|
| 704 |
int dma_mode;
|
| 705 |
/* DMA transfer are enabled. Check if DMA channel is well programmed */
|
| 706 |
dma_mode = DMA_get_channel_mode(fdctrl.dma_chann); |
| 707 |
dma_mode = (dma_mode >> 2) & 3; |
| 708 |
FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d)\n", dma_mode, direction,
|
| 709 |
(128 << fdctrl.fifo[5]) * |
| 710 |
(cur_drv->last_sect - ks + 1));
|
| 711 |
if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
|
| 712 |
direction == FD_DIR_SCANH) && dma_mode == 0) ||
|
| 713 |
(direction == FD_DIR_WRITE && dma_mode == 2) ||
|
| 714 |
(direction == FD_DIR_READ && dma_mode == 1)) {
|
| 715 |
/* No access is allowed until DMA transfer has completed */
|
| 716 |
fdctrl.state |= FD_CTRL_BUSY; |
| 717 |
/* Now, we just have to wait for the DMA controler to
|
| 718 |
* recall us...
|
| 719 |
*/
|
| 720 |
DMA_hold_DREQ(fdctrl.dma_chann); |
| 721 |
DMA_schedule(fdctrl.dma_chann); |
| 722 |
return;
|
| 723 |
} |
| 724 |
} |
| 725 |
FLOPPY_DPRINTF("start non-DMA transfer\n");
|
| 726 |
/* IO based transfer: calculate len */
|
| 727 |
if (fdctrl.fifo[5] == 00) { |
| 728 |
fdctrl.data_len = fdctrl.fifo[8];
|
| 729 |
} else {
|
| 730 |
fdctrl.data_len = 128 << fdctrl.fifo[5]; |
| 731 |
fdctrl.data_len *= (cur_drv->last_sect - ks + 1);
|
| 732 |
if (fdctrl.fifo[0] & 0x80) |
| 733 |
fdctrl.data_len *= 2;
|
| 734 |
} |
| 735 |
fdctrl_raise_irq(0x00);
|
| 736 |
|
| 737 |
return;
|
| 738 |
} |
| 739 |
|
| 740 |
/* Prepare a transfer of deleted data */
|
| 741 |
static void fdctrl_start_transfer_del (int direction) |
| 742 |
{
|
| 743 |
/* We don't handle deleted data,
|
| 744 |
* so we don't return *ANYTHING*
|
| 745 |
*/
|
| 746 |
fdctrl_stop_transfer(0x60, 0x00, 0x00); |
| 747 |
} |
| 748 |
|
| 749 |
/* handlers for DMA transfers */
|
| 750 |
/* XXX: the partial transfer logic seems to be broken */
|
| 751 |
static int fdctrl_transfer_handler (void *opaque, target_ulong addr, int size) |
| 752 |
{
|
| 753 |
fdrive_t *cur_drv, *drv0, *drv1; |
| 754 |
int len;
|
| 755 |
uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00; |
| 756 |
uint8_t tmpbuf[FD_SECTOR_LEN]; |
| 757 |
|
| 758 |
fdctrl_reset_irq(); |
| 759 |
if (!(fdctrl.state & FD_CTRL_BUSY)) {
|
| 760 |
FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
|
| 761 |
return 0; |
| 762 |
} |
| 763 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| 764 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
| 765 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 766 |
if (fdctrl.data_dir == FD_DIR_SCANE || fdctrl.data_dir == FD_DIR_SCANL ||
|
| 767 |
fdctrl.data_dir == FD_DIR_SCANH) |
| 768 |
status2 = 0x04;
|
| 769 |
for (fdctrl.data_len = size; fdctrl.data_pos < fdctrl.data_len;
|
| 770 |
fdctrl.data_pos += len) {
|
| 771 |
len = size - fdctrl.data_pos; |
| 772 |
if (len > FD_SECTOR_LEN)
|
| 773 |
len = FD_SECTOR_LEN; |
| 774 |
FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x "
|
| 775 |
"(%d-0x%08x)\n", len, size, fdctrl.data_pos,
|
| 776 |
fdctrl.data_len, fdctrl.cur_drv, cur_drv->head, |
| 777 |
cur_drv->track, cur_drv->sect, fd_sector(cur_drv), |
| 778 |
fd_sector(cur_drv) * 512);
|
| 779 |
if (fdctrl.data_dir != FD_DIR_WRITE) {
|
| 780 |
/* READ & SCAN commands */
|
| 781 |
if (cur_drv->bs == NULL) { |
| 782 |
fdctrl_stop_transfer(0x40, 0x00, 0x00); |
| 783 |
goto transfer_error;
|
| 784 |
} |
| 785 |
if (bdrv_read(cur_drv->bs, fd_sector(cur_drv), tmpbuf, 1) < 0) { |
| 786 |
FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
|
| 787 |
fd_sector(cur_drv)); |
| 788 |
/* Sure, image size is too small... */
|
| 789 |
memset(tmpbuf, 0, FD_SECTOR_LEN);
|
| 790 |
} |
| 791 |
if (fdctrl.data_dir == FD_DIR_READ) {
|
| 792 |
cpu_physical_memory_write(addr + fdctrl.data_pos, |
| 793 |
tmpbuf, len); |
| 794 |
if (len < FD_SECTOR_LEN) {
|
| 795 |
memcpy(&fdctrl.fifo[0], tmpbuf + len, FD_SECTOR_LEN - len);
|
| 796 |
memset(&fdctrl.fifo[FD_SECTOR_LEN - len], 0, len);
|
| 797 |
} |
| 798 |
} else {
|
| 799 |
int ret;
|
| 800 |
/* XXX: what to do if not enough data ? */
|
| 801 |
cpu_physical_memory_read(addr + fdctrl.data_pos, |
| 802 |
fdctrl.fifo, len); |
| 803 |
if (len < FD_SECTOR_LEN) {
|
| 804 |
memset(&fdctrl.fifo[len], 0, FD_SECTOR_LEN - len);
|
| 805 |
} |
| 806 |
ret = memcmp(tmpbuf, fdctrl.fifo, FD_SECTOR_LEN); |
| 807 |
if (ret == 0) { |
| 808 |
status2 = 0x08;
|
| 809 |
goto end_transfer;
|
| 810 |
} |
| 811 |
if ((ret < 0 && fdctrl.data_dir == FD_DIR_SCANL) || |
| 812 |
(ret > 0 && fdctrl.data_dir == FD_DIR_SCANH)) {
|
| 813 |
status2 = 0x00;
|
| 814 |
goto end_transfer;
|
| 815 |
} |
| 816 |
} |
| 817 |
} else {
|
| 818 |
/* WRITE commands */
|
| 819 |
cpu_physical_memory_read(addr + fdctrl.data_pos, tmpbuf, len); |
| 820 |
if (len < FD_SECTOR_LEN) {
|
| 821 |
memset(tmpbuf + len, 0, FD_SECTOR_LEN - len);
|
| 822 |
} |
| 823 |
if (cur_drv->bs == NULL || |
| 824 |
bdrv_write(cur_drv->bs, fd_sector(cur_drv), tmpbuf, 1) < 0) { |
| 825 |
FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
|
| 826 |
fdctrl_stop_transfer(0x60, 0x00, 0x00); |
| 827 |
goto transfer_error;
|
| 828 |
} |
| 829 |
} |
| 830 |
if (len == FD_SECTOR_LEN) {
|
| 831 |
/* Seek to next sector */
|
| 832 |
if (cur_drv->sect == cur_drv->last_sect) {
|
| 833 |
if (cur_drv->head == 0) { |
| 834 |
cur_drv->head = 1;
|
| 835 |
} else {
|
| 836 |
cur_drv->track++; |
| 837 |
cur_drv->head = 0;
|
| 838 |
} |
| 839 |
cur_drv->sect = 1;
|
| 840 |
FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
|
| 841 |
cur_drv->head, cur_drv->track, cur_drv->sect, |
| 842 |
fd_sector(cur_drv)); |
| 843 |
if (cur_drv->head == 0) { |
| 844 |
FLOPPY_DPRINTF("end transfer\n");
|
| 845 |
goto end_transfer;
|
| 846 |
} |
| 847 |
if (!FD_MULTI_TRACK(fdctrl.data_state)) {
|
| 848 |
/* Single track read */
|
| 849 |
FLOPPY_DPRINTF("single track transfert: end transfer\n");
|
| 850 |
// status1 |= 0x80;
|
| 851 |
goto end_transfer;
|
| 852 |
} |
| 853 |
} else {
|
| 854 |
cur_drv->sect++; |
| 855 |
FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
|
| 856 |
cur_drv->head, cur_drv->track, cur_drv->sect, |
| 857 |
fd_sector(cur_drv)); |
| 858 |
} |
| 859 |
} |
| 860 |
} |
| 861 |
end_transfer:
|
| 862 |
if (fdctrl.data_dir == FD_DIR_SCANE ||
|
| 863 |
fdctrl.data_dir == FD_DIR_SCANL || |
| 864 |
fdctrl.data_dir == FD_DIR_SCANH) |
| 865 |
status2 = 0x08;
|
| 866 |
if (FD_DID_SEEK(fdctrl.data_state))
|
| 867 |
status0 |= 0x20;
|
| 868 |
fdctrl_stop_transfer(status0, status1, status2); |
| 869 |
transfer_error:
|
| 870 |
|
| 871 |
return fdctrl.data_pos;
|
| 872 |
} |
| 873 |
|
| 874 |
/* Data register : 0x05 */
|
| 875 |
static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg)
|
| 876 |
{
|
| 877 |
fdrive_t *cur_drv, *drv0, *drv1; |
| 878 |
uint32_t retval = 0;
|
| 879 |
int pos, len;
|
| 880 |
|
| 881 |
fdctrl_reset_irq(); |
| 882 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| 883 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
| 884 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 885 |
fdctrl.state &= ~FD_CTRL_SLEEP; |
| 886 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_CMD) {
|
| 887 |
FLOPPY_ERROR("can't read data in CMD state\n");
|
| 888 |
return 0; |
| 889 |
} |
| 890 |
pos = fdctrl.data_pos; |
| 891 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
|
| 892 |
pos %= FD_SECTOR_LEN; |
| 893 |
if (pos == 0) { |
| 894 |
len = fdctrl.data_len - fdctrl.data_pos; |
| 895 |
if (len > FD_SECTOR_LEN)
|
| 896 |
len = FD_SECTOR_LEN; |
| 897 |
bdrv_read(cur_drv->bs, fd_sector(cur_drv), |
| 898 |
fdctrl.fifo, len); |
| 899 |
} |
| 900 |
} |
| 901 |
retval = fdctrl.fifo[pos]; |
| 902 |
if (++fdctrl.data_pos == fdctrl.data_len) {
|
| 903 |
fdctrl.data_pos = 0;
|
| 904 |
/* Switch from transfert mode to status mode
|
| 905 |
* then from status mode to command mode
|
| 906 |
*/
|
| 907 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
|
| 908 |
fdctrl_stop_transfer(0x20, 0x00, 0x00); |
| 909 |
else
|
| 910 |
fdctrl_reset_fifo(); |
| 911 |
} |
| 912 |
FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
|
| 913 |
|
| 914 |
return retval;
|
| 915 |
} |
| 916 |
|
| 917 |
static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value) |
| 918 |
{
|
| 919 |
fdrive_t *cur_drv, *drv0, *drv1; |
| 920 |
|
| 921 |
fdctrl_reset_irq(); |
| 922 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
| 923 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel];
|
| 924 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 925 |
/* Reset mode */
|
| 926 |
if (fdctrl.state & FD_CTRL_RESET) {
|
| 927 |
FLOPPY_DPRINTF("Floppy controler in RESET state !\n");
|
| 928 |
return;
|
| 929 |
} |
| 930 |
fdctrl.state &= ~FD_CTRL_SLEEP; |
| 931 |
if ((fdctrl.data_state & FD_STATE_STATE) == FD_STATE_STATUS) {
|
| 932 |
FLOPPY_ERROR("can't write data in status mode\n");
|
| 933 |
return;
|
| 934 |
} |
| 935 |
/* Is it write command time ? */
|
| 936 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) {
|
| 937 |
/* FIFO data write */
|
| 938 |
fdctrl.fifo[fdctrl.data_pos++] = value; |
| 939 |
if (fdctrl.data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) || |
| 940 |
fdctrl.data_pos == fdctrl.data_len) {
|
| 941 |
bdrv_write(cur_drv->bs, fd_sector(cur_drv), |
| 942 |
fdctrl.fifo, FD_SECTOR_LEN); |
| 943 |
} |
| 944 |
/* Switch from transfert mode to status mode
|
| 945 |
* then from status mode to command mode
|
| 946 |
*/
|
| 947 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA)
|
| 948 |
fdctrl_stop_transfer(0x20, 0x00, 0x00); |
| 949 |
return;
|
| 950 |
} |
| 951 |
if (fdctrl.data_pos == 0) { |
| 952 |
/* Command */
|
| 953 |
switch (value & 0x5F) { |
| 954 |
case 0x46: |
| 955 |
/* READ variants */
|
| 956 |
FLOPPY_DPRINTF("READ command\n");
|
| 957 |
/* 8 parameters cmd */
|
| 958 |
fdctrl.data_len = 9;
|
| 959 |
goto enqueue;
|
| 960 |
case 0x4C: |
| 961 |
/* READ_DELETED variants */
|
| 962 |
FLOPPY_DPRINTF("READ_DELETED command\n");
|
| 963 |
/* 8 parameters cmd */
|
| 964 |
fdctrl.data_len = 9;
|
| 965 |
goto enqueue;
|
| 966 |
case 0x50: |
| 967 |
/* SCAN_EQUAL variants */
|
| 968 |
FLOPPY_DPRINTF("SCAN_EQUAL command\n");
|
| 969 |
/* 8 parameters cmd */
|
| 970 |
fdctrl.data_len = 9;
|
| 971 |
goto enqueue;
|
| 972 |
case 0x56: |
| 973 |
/* VERIFY variants */
|
| 974 |
FLOPPY_DPRINTF("VERIFY command\n");
|
| 975 |
/* 8 parameters cmd */
|
| 976 |
fdctrl.data_len = 9;
|
| 977 |
goto enqueue;
|
| 978 |
case 0x59: |
| 979 |
/* SCAN_LOW_OR_EQUAL variants */
|
| 980 |
FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n");
|
| 981 |
/* 8 parameters cmd */
|
| 982 |
fdctrl.data_len = 9;
|
| 983 |
goto enqueue;
|
| 984 |
case 0x5D: |
| 985 |
/* SCAN_HIGH_OR_EQUAL variants */
|
| 986 |
FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n");
|
| 987 |
/* 8 parameters cmd */
|
| 988 |
fdctrl.data_len = 9;
|
| 989 |
goto enqueue;
|
| 990 |
default:
|
| 991 |
break;
|
| 992 |
} |
| 993 |
switch (value & 0x7F) { |
| 994 |
case 0x45: |
| 995 |
/* WRITE variants */
|
| 996 |
FLOPPY_DPRINTF("WRITE command\n");
|
| 997 |
/* 8 parameters cmd */
|
| 998 |
fdctrl.data_len = 9;
|
| 999 |
goto enqueue;
|
| 1000 |
case 0x49: |
| 1001 |
/* WRITE_DELETED variants */
|
| 1002 |
FLOPPY_DPRINTF("WRITE_DELETED command\n");
|
| 1003 |
/* 8 parameters cmd */
|
| 1004 |
fdctrl.data_len = 9;
|
| 1005 |
goto enqueue;
|
| 1006 |
default:
|
| 1007 |
break;
|
| 1008 |
} |
| 1009 |
switch (value) {
|
| 1010 |
case 0x03: |
| 1011 |
/* SPECIFY */
|
| 1012 |
FLOPPY_DPRINTF("SPECIFY command\n");
|
| 1013 |
/* 1 parameter cmd */
|
| 1014 |
fdctrl.data_len = 3;
|
| 1015 |
goto enqueue;
|
| 1016 |
case 0x04: |
| 1017 |
/* SENSE_DRIVE_STATUS */
|
| 1018 |
FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n");
|
| 1019 |
/* 1 parameter cmd */
|
| 1020 |
fdctrl.data_len = 2;
|
| 1021 |
goto enqueue;
|
| 1022 |
case 0x07: |
| 1023 |
/* RECALIBRATE */
|
| 1024 |
FLOPPY_DPRINTF("RECALIBRATE command\n");
|
| 1025 |
/* 1 parameter cmd */
|
| 1026 |
fdctrl.data_len = 2;
|
| 1027 |
goto enqueue;
|
| 1028 |
case 0x08: |
| 1029 |
/* SENSE_INTERRUPT_STATUS */
|
| 1030 |
FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n",
|
| 1031 |
fdctrl.int_status); |
| 1032 |
/* No parameters cmd: returns status if no interrupt */
|
| 1033 |
fdctrl.fifo[0] =
|
| 1034 |
fdctrl.int_status | (cur_drv->head << 2) | fdctrl.cur_drv;
|
| 1035 |
fdctrl.fifo[1] = cur_drv->track;
|
| 1036 |
fdctrl_set_fifo(2, 0); |
| 1037 |
return;
|
| 1038 |
case 0x0E: |
| 1039 |
/* DUMPREG */
|
| 1040 |
FLOPPY_DPRINTF("DUMPREG command\n");
|
| 1041 |
/* Drives position */
|
| 1042 |
fdctrl.fifo[0] = drv0->track;
|
| 1043 |
fdctrl.fifo[1] = drv1->track;
|
| 1044 |
fdctrl.fifo[2] = 0; |
| 1045 |
fdctrl.fifo[3] = 0; |
| 1046 |
/* timers */
|
| 1047 |
fdctrl.fifo[4] = fdctrl.timer0;
|
| 1048 |
fdctrl.fifo[5] = (fdctrl.timer1 << 1) | fdctrl.dma_en; |
| 1049 |
fdctrl.fifo[6] = cur_drv->last_sect;
|
| 1050 |
fdctrl.fifo[7] = (fdctrl.lock << 7) | |
| 1051 |
(cur_drv->perpendicular << 2);
|
| 1052 |
fdctrl.fifo[8] = fdctrl.config;
|
| 1053 |
fdctrl.fifo[9] = fdctrl.precomp_trk;
|
| 1054 |
fdctrl_set_fifo(10, 0); |
| 1055 |
return;
|
| 1056 |
case 0x0F: |
| 1057 |
/* SEEK */
|
| 1058 |
FLOPPY_DPRINTF("SEEK command\n");
|
| 1059 |
/* 2 parameters cmd */
|
| 1060 |
fdctrl.data_len = 3;
|
| 1061 |
goto enqueue;
|
| 1062 |
case 0x10: |
| 1063 |
/* VERSION */
|
| 1064 |
FLOPPY_DPRINTF("VERSION command\n");
|
| 1065 |
/* No parameters cmd */
|
| 1066 |
/* Controler's version */
|
| 1067 |
fdctrl.fifo[0] = fdctrl.version;
|
| 1068 |
fdctrl_set_fifo(1, 1); |
| 1069 |
return;
|
| 1070 |
case 0x12: |
| 1071 |
/* PERPENDICULAR_MODE */
|
| 1072 |
FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n");
|
| 1073 |
/* 1 parameter cmd */
|
| 1074 |
fdctrl.data_len = 2;
|
| 1075 |
goto enqueue;
|
| 1076 |
case 0x13: |
| 1077 |
/* CONFIGURE */
|
| 1078 |
FLOPPY_DPRINTF("CONFIGURE command\n");
|
| 1079 |
/* 3 parameters cmd */
|
| 1080 |
fdctrl.data_len = 4;
|
| 1081 |
goto enqueue;
|
| 1082 |
case 0x14: |
| 1083 |
/* UNLOCK */
|
| 1084 |
FLOPPY_DPRINTF("UNLOCK command\n");
|
| 1085 |
/* No parameters cmd */
|
| 1086 |
fdctrl.lock = 0;
|
| 1087 |
fdctrl.fifo[0] = 0; |
| 1088 |
fdctrl_set_fifo(1, 0); |
| 1089 |
return;
|
| 1090 |
case 0x17: |
| 1091 |
/* POWERDOWN_MODE */
|
| 1092 |
FLOPPY_DPRINTF("POWERDOWN_MODE command\n");
|
| 1093 |
/* 2 parameters cmd */
|
| 1094 |
fdctrl.data_len = 3;
|
| 1095 |
goto enqueue;
|
| 1096 |
case 0x18: |
| 1097 |
/* PART_ID */
|
| 1098 |
FLOPPY_DPRINTF("PART_ID command\n");
|
| 1099 |
/* No parameters cmd */
|
| 1100 |
fdctrl.fifo[0] = 0x41; /* Stepping 1 */ |
| 1101 |
fdctrl_set_fifo(1, 0); |
| 1102 |
return;
|
| 1103 |
case 0x2C: |
| 1104 |
/* SAVE */
|
| 1105 |
FLOPPY_DPRINTF("SAVE command\n");
|
| 1106 |
/* No parameters cmd */
|
| 1107 |
fdctrl.fifo[0] = 0; |
| 1108 |
fdctrl.fifo[1] = 0; |
| 1109 |
/* Drives position */
|
| 1110 |
fdctrl.fifo[2] = drv0->track;
|
| 1111 |
fdctrl.fifo[3] = drv1->track;
|
| 1112 |
fdctrl.fifo[4] = 0; |
| 1113 |
fdctrl.fifo[5] = 0; |
| 1114 |
/* timers */
|
| 1115 |
fdctrl.fifo[6] = fdctrl.timer0;
|
| 1116 |
fdctrl.fifo[7] = fdctrl.timer1;
|
| 1117 |
fdctrl.fifo[8] = cur_drv->last_sect;
|
| 1118 |
fdctrl.fifo[9] = (fdctrl.lock << 7) | |
| 1119 |
(cur_drv->perpendicular << 2);
|
| 1120 |
fdctrl.fifo[10] = fdctrl.config;
|
| 1121 |
fdctrl.fifo[11] = fdctrl.precomp_trk;
|
| 1122 |
fdctrl.fifo[12] = fdctrl.pwrd;
|
| 1123 |
fdctrl.fifo[13] = 0; |
| 1124 |
fdctrl.fifo[14] = 0; |
| 1125 |
fdctrl_set_fifo(15, 1); |
| 1126 |
return;
|
| 1127 |
case 0x33: |
| 1128 |
/* OPTION */
|
| 1129 |
FLOPPY_DPRINTF("OPTION command\n");
|
| 1130 |
/* 1 parameter cmd */
|
| 1131 |
fdctrl.data_len = 2;
|
| 1132 |
goto enqueue;
|
| 1133 |
case 0x42: |
| 1134 |
/* READ_TRACK */
|
| 1135 |
FLOPPY_DPRINTF("READ_TRACK command\n");
|
| 1136 |
/* 8 parameters cmd */
|
| 1137 |
fdctrl.data_len = 9;
|
| 1138 |
goto enqueue;
|
| 1139 |
case 0x4A: |
| 1140 |
/* READ_ID */
|
| 1141 |
FLOPPY_DPRINTF("READ_ID command\n");
|
| 1142 |
/* 1 parameter cmd */
|
| 1143 |
fdctrl.data_len = 2;
|
| 1144 |
goto enqueue;
|
| 1145 |
case 0x4C: |
| 1146 |
/* RESTORE */
|
| 1147 |
FLOPPY_DPRINTF("RESTORE command\n");
|
| 1148 |
/* 17 parameters cmd */
|
| 1149 |
fdctrl.data_len = 18;
|
| 1150 |
goto enqueue;
|
| 1151 |
case 0x4D: |
| 1152 |
/* FORMAT_TRACK */
|
| 1153 |
FLOPPY_DPRINTF("FORMAT_TRACK command\n");
|
| 1154 |
/* 5 parameters cmd */
|
| 1155 |
fdctrl.data_len = 9;
|
| 1156 |
goto enqueue;
|
| 1157 |
case 0x8E: |
| 1158 |
/* DRIVE_SPECIFICATION_COMMAND */
|
| 1159 |
FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n");
|
| 1160 |
/* 5 parameters cmd */
|
| 1161 |
fdctrl.data_len = 6;
|
| 1162 |
goto enqueue;
|
| 1163 |
case 0x8F: |
| 1164 |
/* RELATIVE_SEEK_OUT */
|
| 1165 |
FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n");
|
| 1166 |
/* 2 parameters cmd */
|
| 1167 |
fdctrl.data_len = 3;
|
| 1168 |
goto enqueue;
|
| 1169 |
case 0x94: |
| 1170 |
/* LOCK */
|
| 1171 |
FLOPPY_DPRINTF("LOCK command\n");
|
| 1172 |
/* No parameters cmd */
|
| 1173 |
fdctrl.lock = 1;
|
| 1174 |
fdctrl.fifo[0] = 0x10; |
| 1175 |
fdctrl_set_fifo(1, 1); |
| 1176 |
return;
|
| 1177 |
case 0xCD: |
| 1178 |
/* FORMAT_AND_WRITE */
|
| 1179 |
FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n");
|
| 1180 |
/* 10 parameters cmd */
|
| 1181 |
fdctrl.data_len = 11;
|
| 1182 |
goto enqueue;
|
| 1183 |
case 0xCF: |
| 1184 |
/* RELATIVE_SEEK_IN */
|
| 1185 |
FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n");
|
| 1186 |
/* 2 parameters cmd */
|
| 1187 |
fdctrl.data_len = 3;
|
| 1188 |
goto enqueue;
|
| 1189 |
default:
|
| 1190 |
/* Unknown command */
|
| 1191 |
FLOPPY_ERROR("unknown command: 0x%02x\n", value);
|
| 1192 |
fdctrl_unimplemented(); |
| 1193 |
return;
|
| 1194 |
} |
| 1195 |
} |
| 1196 |
enqueue:
|
| 1197 |
fdctrl.fifo[fdctrl.data_pos] = value; |
| 1198 |
if (++fdctrl.data_pos == fdctrl.data_len) {
|
| 1199 |
/* We now have all parameters
|
| 1200 |
* and will be able to treat the command
|
| 1201 |
*/
|
| 1202 |
switch (fdctrl.fifo[0] & 0x1F) { |
| 1203 |
case 0x06: |
| 1204 |
{
|
| 1205 |
/* READ variants */
|
| 1206 |
FLOPPY_DPRINTF("treat READ command\n");
|
| 1207 |
fdctrl_start_transfer(FD_DIR_READ); |
| 1208 |
return;
|
| 1209 |
} |
| 1210 |
case 0x0C: |
| 1211 |
/* READ_DELETED variants */
|
| 1212 |
// FLOPPY_DPRINTF("treat READ_DELETED command\n");
|
| 1213 |
FLOPPY_ERROR("treat READ_DELETED command\n");
|
| 1214 |
fdctrl_start_transfer_del(1);
|
| 1215 |
return;
|
| 1216 |
case 0x16: |
| 1217 |
/* VERIFY variants */
|
| 1218 |
// FLOPPY_DPRINTF("treat VERIFY command\n");
|
| 1219 |
FLOPPY_ERROR("treat VERIFY command\n");
|
| 1220 |
fdctrl_stop_transfer(0x20, 0x00, 0x00); |
| 1221 |
return;
|
| 1222 |
case 0x10: |
| 1223 |
/* SCAN_EQUAL variants */
|
| 1224 |
// FLOPPY_DPRINTF("treat SCAN_EQUAL command\n");
|
| 1225 |
FLOPPY_ERROR("treat SCAN_EQUAL command\n");
|
| 1226 |
fdctrl_start_transfer(FD_DIR_SCANE); |
| 1227 |
return;
|
| 1228 |
case 0x19: |
| 1229 |
/* SCAN_LOW_OR_EQUAL variants */
|
| 1230 |
// FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n");
|
| 1231 |
FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n");
|
| 1232 |
fdctrl_start_transfer(FD_DIR_SCANL); |
| 1233 |
return;
|
| 1234 |
case 0x1D: |
| 1235 |
/* SCAN_HIGH_OR_EQUAL variants */
|
| 1236 |
// FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n");
|
| 1237 |
FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n");
|
| 1238 |
fdctrl_start_transfer(FD_DIR_SCANH); |
| 1239 |
return;
|
| 1240 |
default:
|
| 1241 |
break;
|
| 1242 |
} |
| 1243 |
switch (fdctrl.fifo[0] & 0x3F) { |
| 1244 |
case 0x05: |
| 1245 |
/* WRITE variants */
|
| 1246 |
FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl.fifo[0]); |
| 1247 |
fdctrl_start_transfer(FD_DIR_WRITE); |
| 1248 |
return;
|
| 1249 |
case 0x09: |
| 1250 |
/* WRITE_DELETED variants */
|
| 1251 |
// FLOPPY_DPRINTF("treat WRITE_DELETED command\n");
|
| 1252 |
FLOPPY_ERROR("treat WRITE_DELETED command\n");
|
| 1253 |
fdctrl_start_transfer_del(FD_DIR_WRITE); |
| 1254 |
return;
|
| 1255 |
default:
|
| 1256 |
break;
|
| 1257 |
} |
| 1258 |
switch (fdctrl.fifo[0]) { |
| 1259 |
case 0x03: |
| 1260 |
/* SPECIFY */
|
| 1261 |
FLOPPY_DPRINTF("treat SPECIFY command\n");
|
| 1262 |
fdctrl.timer0 = (fdctrl.fifo[1] >> 4) & 0xF; |
| 1263 |
fdctrl.timer1 = fdctrl.fifo[1] >> 1; |
| 1264 |
/* No result back */
|
| 1265 |
fdctrl_reset_fifo(); |
| 1266 |
break;
|
| 1267 |
case 0x04: |
| 1268 |
/* SENSE_DRIVE_STATUS */
|
| 1269 |
FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n");
|
| 1270 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| 1271 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 1272 |
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
| 1273 |
/* 1 Byte status back */
|
| 1274 |
fdctrl.fifo[0] = (cur_drv->ro << 6) | |
| 1275 |
(cur_drv->track == 0 ? 0x10 : 0x00) | |
| 1276 |
fdctrl.cur_drv; |
| 1277 |
fdctrl_set_fifo(1, 0); |
| 1278 |
break;
|
| 1279 |
case 0x07: |
| 1280 |
/* RECALIBRATE */
|
| 1281 |
FLOPPY_DPRINTF("treat RECALIBRATE command\n");
|
| 1282 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| 1283 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 1284 |
fd_recalibrate(cur_drv); |
| 1285 |
fdctrl_reset_fifo(); |
| 1286 |
/* Raise Interrupt */
|
| 1287 |
fdctrl_raise_irq(0x20);
|
| 1288 |
break;
|
| 1289 |
case 0x0F: |
| 1290 |
/* SEEK */
|
| 1291 |
FLOPPY_DPRINTF("treat SEEK command\n");
|
| 1292 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| 1293 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 1294 |
if (fdctrl.fifo[2] <= cur_drv->track) |
| 1295 |
cur_drv->dir = 1;
|
| 1296 |
else
|
| 1297 |
cur_drv->dir = 0;
|
| 1298 |
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
| 1299 |
if (fdctrl.fifo[2] > cur_drv->max_track) { |
| 1300 |
fdctrl_raise_irq(0x60);
|
| 1301 |
} else {
|
| 1302 |
cur_drv->track = fdctrl.fifo[2];
|
| 1303 |
fdctrl_reset_fifo(); |
| 1304 |
/* Raise Interrupt */
|
| 1305 |
fdctrl_raise_irq(0x20);
|
| 1306 |
} |
| 1307 |
break;
|
| 1308 |
case 0x12: |
| 1309 |
/* PERPENDICULAR_MODE */
|
| 1310 |
FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n");
|
| 1311 |
if (fdctrl.fifo[1] & 0x80) |
| 1312 |
cur_drv->perpendicular = fdctrl.fifo[1] & 0x7; |
| 1313 |
/* No result back */
|
| 1314 |
fdctrl_reset_fifo(); |
| 1315 |
break;
|
| 1316 |
case 0x13: |
| 1317 |
/* CONFIGURE */
|
| 1318 |
FLOPPY_DPRINTF("treat CONFIGURE command\n");
|
| 1319 |
fdctrl.config = fdctrl.fifo[2];
|
| 1320 |
fdctrl.precomp_trk = fdctrl.fifo[3];
|
| 1321 |
/* No result back */
|
| 1322 |
fdctrl_reset_fifo(); |
| 1323 |
break;
|
| 1324 |
case 0x17: |
| 1325 |
/* POWERDOWN_MODE */
|
| 1326 |
FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n");
|
| 1327 |
fdctrl.pwrd = fdctrl.fifo[1];
|
| 1328 |
fdctrl.fifo[0] = fdctrl.fifo[1]; |
| 1329 |
fdctrl_set_fifo(1, 1); |
| 1330 |
break;
|
| 1331 |
case 0x33: |
| 1332 |
/* OPTION */
|
| 1333 |
FLOPPY_DPRINTF("treat OPTION command\n");
|
| 1334 |
/* No result back */
|
| 1335 |
fdctrl_reset_fifo(); |
| 1336 |
break;
|
| 1337 |
case 0x42: |
| 1338 |
/* READ_TRACK */
|
| 1339 |
// FLOPPY_DPRINTF("treat READ_TRACK command\n");
|
| 1340 |
FLOPPY_ERROR("treat READ_TRACK command\n");
|
| 1341 |
fdctrl_unimplemented(); |
| 1342 |
break;
|
| 1343 |
case 0x4A: |
| 1344 |
/* READ_ID */
|
| 1345 |
// FLOPPY_DPRINTF("treat READ_ID command\n");
|
| 1346 |
FLOPPY_ERROR("treat READ_ID command\n");
|
| 1347 |
fdctrl_stop_transfer(0x00, 0x00, 0x00); |
| 1348 |
break;
|
| 1349 |
case 0x4C: |
| 1350 |
/* RESTORE */
|
| 1351 |
FLOPPY_DPRINTF("treat RESTORE command\n");
|
| 1352 |
/* Drives position */
|
| 1353 |
drv0->track = fdctrl.fifo[3];
|
| 1354 |
drv1->track = fdctrl.fifo[4];
|
| 1355 |
/* timers */
|
| 1356 |
fdctrl.timer0 = fdctrl.fifo[7];
|
| 1357 |
fdctrl.timer1 = fdctrl.fifo[8];
|
| 1358 |
cur_drv->last_sect = fdctrl.fifo[9];
|
| 1359 |
fdctrl.lock = fdctrl.fifo[10] >> 7; |
| 1360 |
cur_drv->perpendicular = (fdctrl.fifo[10] >> 2) & 0xF; |
| 1361 |
fdctrl.config = fdctrl.fifo[11];
|
| 1362 |
fdctrl.precomp_trk = fdctrl.fifo[12];
|
| 1363 |
fdctrl.pwrd = fdctrl.fifo[13];
|
| 1364 |
fdctrl_reset_fifo(); |
| 1365 |
break;
|
| 1366 |
case 0x4D: |
| 1367 |
/* FORMAT_TRACK */
|
| 1368 |
// FLOPPY_DPRINTF("treat FORMAT_TRACK command\n");
|
| 1369 |
FLOPPY_ERROR("treat FORMAT_TRACK command\n");
|
| 1370 |
fdctrl_unimplemented(); |
| 1371 |
break;
|
| 1372 |
case 0x8E: |
| 1373 |
/* DRIVE_SPECIFICATION_COMMAND */
|
| 1374 |
FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n");
|
| 1375 |
if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x80) { |
| 1376 |
/* Command parameters done */
|
| 1377 |
if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x40) { |
| 1378 |
fdctrl.fifo[0] = fdctrl.fifo[1]; |
| 1379 |
fdctrl.fifo[2] = 0; |
| 1380 |
fdctrl.fifo[3] = 0; |
| 1381 |
fdctrl_set_fifo(4, 1); |
| 1382 |
} else {
|
| 1383 |
fdctrl_reset_fifo(); |
| 1384 |
} |
| 1385 |
} else if (fdctrl.data_len > 7) { |
| 1386 |
/* ERROR */
|
| 1387 |
fdctrl.fifo[0] = 0x80 | |
| 1388 |
(cur_drv->head << 2) | fdctrl.cur_drv;
|
| 1389 |
fdctrl_set_fifo(1, 1); |
| 1390 |
} |
| 1391 |
break;
|
| 1392 |
case 0x8F: |
| 1393 |
/* RELATIVE_SEEK_OUT */
|
| 1394 |
FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n");
|
| 1395 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| 1396 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 1397 |
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
| 1398 |
if (fdctrl.fifo[2] + cur_drv->track > cur_drv->max_track) { |
| 1399 |
/* ERROR */
|
| 1400 |
fdctrl_raise_irq(0x70);
|
| 1401 |
} else {
|
| 1402 |
cur_drv->track += fdctrl.fifo[2];
|
| 1403 |
cur_drv->dir = 0;
|
| 1404 |
fdctrl_reset_fifo(); |
| 1405 |
fdctrl_raise_irq(0x20);
|
| 1406 |
} |
| 1407 |
break;
|
| 1408 |
case 0xCD: |
| 1409 |
/* FORMAT_AND_WRITE */
|
| 1410 |
// FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n");
|
| 1411 |
FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n");
|
| 1412 |
fdctrl_unimplemented(); |
| 1413 |
break;
|
| 1414 |
case 0xCF: |
| 1415 |
/* RELATIVE_SEEK_IN */
|
| 1416 |
FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n");
|
| 1417 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
| 1418 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1;
|
| 1419 |
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
| 1420 |
if (fdctrl.fifo[2] > cur_drv->track) { |
| 1421 |
/* ERROR */
|
| 1422 |
fdctrl_raise_irq(0x60);
|
| 1423 |
} else {
|
| 1424 |
fdctrl_reset_fifo(); |
| 1425 |
cur_drv->track -= fdctrl.fifo[2];
|
| 1426 |
cur_drv->dir = 1;
|
| 1427 |
/* Raise Interrupt */
|
| 1428 |
fdctrl_raise_irq(0x20);
|
| 1429 |
} |
| 1430 |
break;
|
| 1431 |
} |
| 1432 |
} |
| 1433 |
} |