Revision 8977f3c1
b/hw/fdc.c | ||
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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 "cpu.h" |
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#include "vl.h" |
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|
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/********************************************************/ |
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/* debug Floppy devices */ |
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//#define DEBUG_FLOPPY |
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|
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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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|
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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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/********************************************************/ |
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/* Floppy drive emulation */ |
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|
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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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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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|
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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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/********************************************************/ |
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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 (uint32_t addr, int size, int *irq); |
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static int fdctrl_misc_handler (int duknwo); |
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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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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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|
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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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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, |
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&fdctrl_misc_handler); |
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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); |
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register_ioport_read(base + 0x02, 1, fdctrl_read_dor, 1); |
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register_ioport_write(base + 0x02, 1, fdctrl_write_dor, 1); |
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register_ioport_read(base + 0x03, 1, fdctrl_read_tape, 1); |
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register_ioport_write(base + 0x03, 1, fdctrl_write_tape, 1); |
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register_ioport_read(base + 0x04, 1, fdctrl_read_main_status, 1); |
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register_ioport_write(base + 0x04, 1, fdctrl_write_rate, 1); |
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register_ioport_read(base + 0x05, 1, fdctrl_read_data, 1); |
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register_ioport_write(base + 0x05, 1, fdctrl_write_data, 1); |
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register_ioport_read(base + 0x07, 1, fdctrl_read_dir, 1); |
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} |
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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); |
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#endif |
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} |
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|
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int fdctrl_disk_change (int idx, const unsigned char *filename, int ro) |
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{ |
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fdrive_t *drv; |
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|
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if (idx < 0 || idx > 1) |
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return -1; |
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FLOPPY_DPRINTF("disk %d change: %s (%s)\n", idx, filename, |
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ro == 0 ? "rw" : "ro"); |
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drv = &fdctrl.drives[idx]; |
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if (fd_table[idx] != NULL) { |
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bdrv_close(fd_table[idx]); |
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fd_table[idx] = NULL; |
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} |
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fd_table[idx] = bdrv_open(filename, ro); |
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drv->bs = fd_table[idx]; |
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if (fd_table[idx] == NULL) |
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return -1; |
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fd_revalidate(drv, ro); |
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#if 0 |
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fd_recalibrate(drv); |
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fdctrl_reset_fifo(); |
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fdctrl_raise_irq(0x20); |
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#endif |
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|
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return 0; |
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} |
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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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384 |
|
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static void fdctrl_raise_irq (uint8_t status) |
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{ |
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387 |
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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394 |
|
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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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|
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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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415 |
|
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/* Status B register : 0x01 (read-only) */ |
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static uint32_t fdctrl_read_statusB (CPUState *env, uint32_t reg) |
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{ |
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419 |
fdctrl_reset_irq(); |
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FLOPPY_DPRINTF("status register: 0x00\n"); |
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421 |
|
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422 |
return 0; |
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} |
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424 |
|
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425 |
/* Digital output register : 0x02 */ |
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426 |
static uint32_t fdctrl_read_dor (CPUState *env, uint32_t reg) |
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427 |
{ |
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428 |
fdrive_t *cur_drv, *drv0, *drv1; |
|
429 |
uint32_t retval = 0; |
|
430 |
|
|
431 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
|
432 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
|
433 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
434 |
/* Drive motors state indicators */ |
|
435 |
retval |= drv1->motor << 5; |
|
436 |
retval |= drv0->motor << 4; |
|
437 |
/* DMA enable */ |
|
438 |
retval |= fdctrl.dma_en << 3; |
|
439 |
/* Reset indicator */ |
|
440 |
retval |= (fdctrl.state & FD_CTRL_RESET) == 0 ? 0x04 : 0; |
|
441 |
/* Selected drive */ |
|
442 |
retval |= fdctrl.cur_drv; |
|
443 |
FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval); |
|
444 |
|
|
445 |
return retval; |
|
446 |
} |
|
447 |
|
|
448 |
static void fdctrl_write_dor (CPUState *env, uint32_t reg, uint32_t value) |
|
449 |
{ |
|
450 |
fdrive_t *drv0, *drv1; |
|
451 |
|
|
452 |
fdctrl_reset_irq(); |
|
453 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
|
454 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
|
455 |
/* Reset mode */ |
|
456 |
if (fdctrl.state & FD_CTRL_RESET) { |
|
457 |
if (!(value & 0x04)) { |
|
458 |
FLOPPY_DPRINTF("Floppy controler in RESET state !\n"); |
|
459 |
return; |
|
460 |
} |
|
461 |
} |
|
462 |
FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value); |
|
463 |
/* Drive motors state indicators */ |
|
464 |
if (value & 0x20) |
|
465 |
fd_start(drv1); |
|
466 |
else |
|
467 |
fd_stop(drv1); |
|
468 |
if (value & 0x10) |
|
469 |
fd_start(drv0); |
|
470 |
else |
|
471 |
fd_stop(drv0); |
|
472 |
/* DMA enable */ |
|
473 |
#if 0 |
|
474 |
if (fdctrl.dma_chann != -1) |
|
475 |
fdctrl.dma_en = 1 - ((value >> 3) & 1); |
|
476 |
#endif |
|
477 |
/* Reset */ |
|
478 |
if (!(value & 0x04)) { |
|
479 |
if (!(fdctrl.state & FD_CTRL_RESET)) { |
|
480 |
FLOPPY_DPRINTF("controler enter RESET state\n"); |
|
481 |
fdctrl.state |= FD_CTRL_RESET; |
|
482 |
fdctrl_reset(1); |
|
483 |
} |
|
484 |
} else { |
|
485 |
if (fdctrl.state & FD_CTRL_RESET) { |
|
486 |
FLOPPY_DPRINTF("controler out of RESET state\n"); |
|
487 |
fdctrl.state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP); |
|
488 |
} |
|
489 |
} |
|
490 |
/* Selected drive */ |
|
491 |
fdctrl.cur_drv = value & 1; |
|
492 |
} |
|
493 |
|
|
494 |
/* Tape drive register : 0x03 */ |
|
495 |
static uint32_t fdctrl_read_tape (CPUState *env, uint32_t reg) |
|
496 |
{ |
|
497 |
uint32_t retval = 0; |
|
498 |
|
|
499 |
fdctrl_reset_irq(); |
|
500 |
/* Disk boot selection indicator */ |
|
501 |
retval |= fdctrl.bootsel << 2; |
|
502 |
/* Tape indicators: never allowed */ |
|
503 |
FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval); |
|
504 |
|
|
505 |
return retval; |
|
506 |
} |
|
507 |
|
|
508 |
static void fdctrl_write_tape (CPUState *env, uint32_t reg, uint32_t value) |
|
509 |
{ |
|
510 |
fdctrl_reset_irq(); |
|
511 |
/* Reset mode */ |
|
512 |
if (fdctrl.state & FD_CTRL_RESET) { |
|
513 |
FLOPPY_DPRINTF("Floppy controler in RESET state !\n"); |
|
514 |
return; |
|
515 |
} |
|
516 |
FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value); |
|
517 |
/* Disk boot selection indicator */ |
|
518 |
fdctrl.bootsel = (value >> 2) & 1; |
|
519 |
/* Tape indicators: never allow */ |
|
520 |
} |
|
521 |
|
|
522 |
/* Main status register : 0x04 (read) */ |
|
523 |
static uint32_t fdctrl_read_main_status (CPUState *env, uint32_t reg) |
|
524 |
{ |
|
525 |
uint32_t retval = 0; |
|
526 |
|
|
527 |
fdctrl_reset_irq(); |
|
528 |
fdctrl.state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET); |
|
529 |
if (!(fdctrl.state & FD_CTRL_BUSY)) { |
|
530 |
/* Data transfer allowed */ |
|
531 |
retval |= 0x80; |
|
532 |
/* Data transfer direction indicator */ |
|
533 |
if (fdctrl.data_dir == FD_DIR_READ) |
|
534 |
retval |= 0x40; |
|
535 |
} |
|
536 |
/* Should handle 0x20 for SPECIFY command */ |
|
537 |
/* Command busy indicator */ |
|
538 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA || |
|
539 |
FD_STATE(fdctrl.data_state) == FD_STATE_STATUS) |
|
540 |
retval |= 0x10; |
|
541 |
FLOPPY_DPRINTF("main status register: 0x%02x\n", retval); |
|
542 |
|
|
543 |
return retval; |
|
544 |
} |
|
545 |
|
|
546 |
/* Data select rate register : 0x04 (write) */ |
|
547 |
static void fdctrl_write_rate (CPUState *env, uint32_t reg, uint32_t value) |
|
548 |
{ |
|
549 |
fdctrl_reset_irq(); |
|
550 |
/* Reset mode */ |
|
551 |
if (fdctrl.state & FD_CTRL_RESET) { |
|
552 |
if (reg != 0x2 || !(value & 0x04)) { |
|
553 |
FLOPPY_DPRINTF("Floppy controler in RESET state !\n"); |
|
554 |
return; |
|
555 |
} |
|
556 |
} |
|
557 |
FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value); |
|
558 |
/* Reset: autoclear */ |
|
559 |
if (value & 0x80) { |
|
560 |
fdctrl.state |= FD_CTRL_RESET; |
|
561 |
fdctrl_reset(1); |
|
562 |
fdctrl.state &= ~FD_CTRL_RESET; |
|
563 |
} |
|
564 |
if (value & 0x40) { |
|
565 |
fdctrl.state |= FD_CTRL_SLEEP; |
|
566 |
fdctrl_reset(1); |
|
567 |
} |
|
568 |
// fdctrl.precomp = (value >> 2) & 0x07; |
|
569 |
} |
|
570 |
|
|
571 |
/* Digital input register : 0x07 (read-only) */ |
|
572 |
static uint32_t fdctrl_read_dir (CPUState *env, uint32_t reg) |
|
573 |
{ |
|
574 |
fdrive_t *drv0, *drv1; |
|
575 |
uint32_t retval = 0; |
|
576 |
|
|
577 |
fdctrl_reset_irq(); |
|
578 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
|
579 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
|
580 |
if (drv0->rv || drv1->rv) |
|
581 |
retval |= 0x80; |
|
582 |
if (retval != 0) |
|
583 |
FLOPPY_ERROR("Floppy digital input register: 0x%02x\n", retval); |
|
584 |
drv0->rv = 0; |
|
585 |
drv1->rv = 0; |
|
586 |
|
|
587 |
return retval; |
|
588 |
} |
|
589 |
|
|
590 |
/* FIFO state control */ |
|
591 |
static void fdctrl_reset_fifo (void) |
|
592 |
{ |
|
593 |
fdctrl.data_dir = FD_DIR_WRITE; |
|
594 |
fdctrl.data_pos = 0; |
|
595 |
fdctrl.data_state = FD_STATE_CMD; |
|
596 |
} |
|
597 |
|
|
598 |
/* Set FIFO status for the host to read */ |
|
599 |
static void fdctrl_set_fifo (int fifo_len, int do_irq) |
|
600 |
{ |
|
601 |
fdctrl.data_dir = FD_DIR_READ; |
|
602 |
fdctrl.data_len = fifo_len; |
|
603 |
fdctrl.data_pos = 0; |
|
604 |
fdctrl.data_state = FD_STATE_STATUS; |
|
605 |
if (do_irq) |
|
606 |
fdctrl_raise_irq(0x00); |
|
607 |
} |
|
608 |
|
|
609 |
/* Set an error: unimplemented/unknown command */ |
|
610 |
static void fdctrl_unimplemented (void) |
|
611 |
{ |
|
612 |
#if 0 |
|
613 |
fdrive_t *cur_drv, *drv0, *drv1; |
|
614 |
|
|
615 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
|
616 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
|
617 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
618 |
fdctrl.fifo[0] = 0x60 | (cur_drv->head << 1) | fdctrl.cur_drv; |
|
619 |
fdctrl.fifo[1] = 0x00; |
|
620 |
fdctrl.fifo[2] = 0x00; |
|
621 |
fdctrl_set_fifo(3, 1); |
|
622 |
#else |
|
623 |
fdctrl_reset_fifo(); |
|
624 |
#endif |
|
625 |
} |
|
626 |
|
|
627 |
/* Callback for transfer end (stop or abort) */ |
|
628 |
static void fdctrl_stop_transfer (uint8_t status0, uint8_t status1, |
|
629 |
uint8_t status2) |
|
630 |
{ |
|
631 |
fdrive_t *cur_drv, *drv0, *drv1; |
|
632 |
|
|
633 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
|
634 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
|
635 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
636 |
FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n", |
|
637 |
status0, status1, status2, |
|
638 |
status0 | (cur_drv->head << 1) | fdctrl.cur_drv); |
|
639 |
fdctrl.fifo[0] = status0 | (cur_drv->head << 1) | fdctrl.cur_drv; |
|
640 |
fdctrl.fifo[1] = status1; |
|
641 |
fdctrl.fifo[2] = status2; |
|
642 |
fdctrl.fifo[3] = cur_drv->track; |
|
643 |
fdctrl.fifo[4] = cur_drv->head; |
|
644 |
fdctrl.fifo[5] = cur_drv->sect; |
|
645 |
fdctrl.fifo[6] = FD_SECTOR_SC; |
|
646 |
fdctrl.data_dir = FD_DIR_READ; |
|
647 |
if (fdctrl.state & FD_CTRL_BUSY) |
|
648 |
DMA_release_DREQ(fdctrl.dma_chann); |
|
649 |
fdctrl_set_fifo(7, 1); |
|
650 |
} |
|
651 |
|
|
652 |
/* Prepare a data transfer (either DMA or FIFO) */ |
|
653 |
static void fdctrl_start_transfer (int direction) |
|
654 |
{ |
|
655 |
fdrive_t *cur_drv, *drv0, *drv1; |
|
656 |
uint8_t kh, kt, ks; |
|
657 |
int did_seek; |
|
658 |
|
|
659 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
|
660 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
|
661 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
|
662 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
663 |
kt = fdctrl.fifo[2]; |
|
664 |
kh = fdctrl.fifo[3]; |
|
665 |
ks = fdctrl.fifo[4]; |
|
666 |
FLOPPY_DPRINTF("Start tranfert at %d %d %02x %02x (%d)\n", |
|
667 |
fdctrl.cur_drv, kh, kt, ks, |
|
668 |
_fd_sector(kh, kt, ks, cur_drv->last_sect)); |
|
669 |
did_seek = 0; |
|
670 |
switch (fd_seek(cur_drv, kh, kt, ks, fdctrl.config & 0x40)) { |
|
671 |
case 2: |
|
672 |
/* sect too big */ |
|
673 |
fdctrl_stop_transfer(0x40, 0x00, 0x00); |
|
674 |
fdctrl.fifo[3] = kt; |
|
675 |
fdctrl.fifo[4] = kh; |
|
676 |
fdctrl.fifo[5] = ks; |
|
677 |
return; |
|
678 |
case 3: |
|
679 |
/* track too big */ |
|
680 |
fdctrl_stop_transfer(0x40, 0x80, 0x00); |
|
681 |
fdctrl.fifo[3] = kt; |
|
682 |
fdctrl.fifo[4] = kh; |
|
683 |
fdctrl.fifo[5] = ks; |
|
684 |
return; |
|
685 |
case 4: |
|
686 |
/* No seek enabled */ |
|
687 |
fdctrl_stop_transfer(0x40, 0x00, 0x00); |
|
688 |
fdctrl.fifo[3] = kt; |
|
689 |
fdctrl.fifo[4] = kh; |
|
690 |
fdctrl.fifo[5] = ks; |
|
691 |
return; |
|
692 |
case 1: |
|
693 |
did_seek = 1; |
|
694 |
break; |
|
695 |
default: |
|
696 |
break; |
|
697 |
} |
|
698 |
/* Set the FIFO state */ |
|
699 |
fdctrl.data_dir = direction; |
|
700 |
fdctrl.data_pos = 0; |
|
701 |
fdctrl.data_state = FD_STATE_DATA; /* FIFO ready for data */ |
|
702 |
if (fdctrl.fifo[0] & 0x80) |
|
703 |
fdctrl.data_state |= FD_STATE_MULTI; |
|
704 |
if (did_seek) |
|
705 |
fdctrl.data_state |= FD_STATE_SEEK; |
|
706 |
if (fdctrl.dma_en) { |
|
707 |
int dma_mode; |
|
708 |
/* DMA transfer are enabled. Check if DMA channel is well programmed */ |
|
709 |
dma_mode = DMA_get_channel_mode(fdctrl.dma_chann); |
|
710 |
dma_mode = (dma_mode >> 2) & 3; |
|
711 |
FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d)\n", dma_mode, direction, |
|
712 |
(128 << fdctrl.fifo[5]) * |
|
713 |
(cur_drv->last_sect - ks + 1)); |
|
714 |
if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL || |
|
715 |
direction == FD_DIR_SCANH) && dma_mode == 0) || |
|
716 |
(direction == FD_DIR_WRITE && dma_mode == 2) || |
|
717 |
(direction == FD_DIR_READ && dma_mode == 1)) { |
|
718 |
/* No access is allowed until DMA transfer has completed */ |
|
719 |
fdctrl.state |= FD_CTRL_BUSY; |
|
720 |
/* Now, we just have to wait for the DMA controler to |
|
721 |
* recall us... |
|
722 |
*/ |
|
723 |
DMA_hold_DREQ(fdctrl.dma_chann); |
|
724 |
return; |
|
725 |
} |
|
726 |
} |
|
727 |
FLOPPY_DPRINTF("start non-DMA transfer\n"); |
|
728 |
/* IO based transfer: calculate len */ |
|
729 |
if (fdctrl.fifo[5] == 00) { |
|
730 |
fdctrl.data_len = fdctrl.fifo[8]; |
|
731 |
} else { |
|
732 |
fdctrl.data_len = 128 << fdctrl.fifo[5]; |
|
733 |
fdctrl.data_len *= (cur_drv->last_sect - ks + 1); |
|
734 |
if (fdctrl.fifo[0] & 0x80) |
|
735 |
fdctrl.data_len *= 2; |
|
736 |
} |
|
737 |
fdctrl_raise_irq(0x00); |
|
738 |
|
|
739 |
return; |
|
740 |
} |
|
741 |
|
|
742 |
/* Prepare a transfer of deleted data */ |
|
743 |
static void fdctrl_start_transfer_del (int direction) |
|
744 |
{ |
|
745 |
/* We don't handle deleted data, |
|
746 |
* so we don't return *ANYTHING* |
|
747 |
*/ |
|
748 |
fdctrl_stop_transfer(0x60, 0x00, 0x00); |
|
749 |
} |
|
750 |
|
|
751 |
/* handlers for DMA transfers */ |
|
752 |
static int fdctrl_transfer_handler (uint32_t addr, int size, int *irq) |
|
753 |
{ |
|
754 |
fdrive_t *cur_drv, *drv0, *drv1; |
|
755 |
void *orig; |
|
756 |
int len; |
|
757 |
uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00; |
|
758 |
|
|
759 |
fdctrl_reset_irq(); |
|
760 |
if (!(fdctrl.state & FD_CTRL_BUSY)) { |
|
761 |
FLOPPY_DPRINTF("Not in DMA transfer mode !\n"); |
|
762 |
return 0; |
|
763 |
} |
|
764 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
|
765 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
|
766 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
767 |
// *irq = fdctrl.irq_lvl; |
|
768 |
*irq = -1; |
|
769 |
if (fdctrl.data_dir == FD_DIR_SCANE || fdctrl.data_dir == FD_DIR_SCANL || |
|
770 |
fdctrl.data_dir == FD_DIR_SCANH) |
|
771 |
status2 = 0x04; |
|
772 |
for (fdctrl.data_len = size; fdctrl.data_pos < fdctrl.data_len; |
|
773 |
fdctrl.data_pos += len) { |
|
774 |
len = size - fdctrl.data_pos; |
|
775 |
if (len > FD_SECTOR_LEN) |
|
776 |
len = FD_SECTOR_LEN; |
|
777 |
FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x %02x " |
|
778 |
"(%d-0x%08x)\n", len, size, fdctrl.data_pos, |
|
779 |
fdctrl.data_len, fdctrl.cur_drv, cur_drv->head, |
|
780 |
cur_drv->track, cur_drv->sect, fd_sector(cur_drv), |
|
781 |
fd_sector(cur_drv) * 512); |
|
782 |
if (len < FD_SECTOR_LEN) { |
|
783 |
memset(&fdctrl.fifo[FD_SECTOR_LEN - len], 0, |
|
784 |
FD_SECTOR_LEN - len - 1); |
|
785 |
orig = fdctrl.fifo; |
|
786 |
} else { |
|
787 |
orig = (void *)(addr + fdctrl.data_pos); |
|
788 |
} |
|
789 |
if (fdctrl.data_dir != FD_DIR_WRITE) { |
|
790 |
/* READ & SCAN commands */ |
|
791 |
if (cur_drv->bs == NULL || |
|
792 |
bdrv_read(cur_drv->bs, fd_sector(cur_drv), orig, 1) < 0) { |
|
793 |
FLOPPY_DPRINTF("Floppy: error getting sector %d\n", |
|
794 |
fd_sector(cur_drv)); |
|
795 |
/* Sure, image size is too small... */ |
|
796 |
memset((void *)(addr + fdctrl.data_pos), 0, FD_SECTOR_LEN); |
|
797 |
} |
|
798 |
if (fdctrl.data_dir == FD_DIR_READ) { |
|
799 |
if (len < FD_SECTOR_LEN) { |
|
800 |
memcpy((void *)(addr + fdctrl.data_pos), |
|
801 |
fdctrl.fifo, FD_SECTOR_LEN); |
|
802 |
} |
|
803 |
} else { |
|
804 |
int ret; |
|
805 |
ret = memcmp((void *)(addr + fdctrl.data_pos), |
|
806 |
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 |
if (cur_drv->bs == NULL || |
|
820 |
bdrv_write(cur_drv->bs, fd_sector(cur_drv), orig, 1) < 0) { |
|
821 |
FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv)); |
|
822 |
fdctrl_stop_transfer(0x60, 0x00, 0x00); |
|
823 |
goto transfer_error; |
|
824 |
} |
|
825 |
} |
|
826 |
if (len == FD_SECTOR_LEN) { |
|
827 |
/* Seek to next sector */ |
|
828 |
if (cur_drv->sect == cur_drv->last_sect) { |
|
829 |
if (cur_drv->head == 0) { |
|
830 |
cur_drv->head = 1; |
|
831 |
} else { |
|
832 |
cur_drv->track++; |
|
833 |
cur_drv->head = 0; |
|
834 |
} |
|
835 |
cur_drv->sect = 1; |
|
836 |
FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n", |
|
837 |
cur_drv->head, cur_drv->track, cur_drv->sect, |
|
838 |
fd_sector(cur_drv)); |
|
839 |
if (cur_drv->head == 0) { |
|
840 |
FLOPPY_DPRINTF("end transfer\n"); |
|
841 |
goto end_transfer; |
|
842 |
} |
|
843 |
if (!FD_MULTI_TRACK(fdctrl.data_state)) { |
|
844 |
/* Single track read */ |
|
845 |
FLOPPY_DPRINTF("single track transfert: end transfer\n"); |
|
846 |
// status1 |= 0x80; |
|
847 |
goto end_transfer; |
|
848 |
} |
|
849 |
} else { |
|
850 |
cur_drv->sect++; |
|
851 |
FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n", |
|
852 |
cur_drv->head, cur_drv->track, cur_drv->sect, |
|
853 |
fd_sector(cur_drv)); |
|
854 |
} |
|
855 |
} |
|
856 |
} |
|
857 |
end_transfer: |
|
858 |
if (fdctrl.data_dir == FD_DIR_SCANE || |
|
859 |
fdctrl.data_dir == FD_DIR_SCANL || |
|
860 |
fdctrl.data_dir == FD_DIR_SCANH) |
|
861 |
status2 = 0x08; |
|
862 |
if (FD_DID_SEEK(fdctrl.data_state)) |
|
863 |
status0 |= 0x20; |
|
864 |
fdctrl_stop_transfer(status0, status1, status2); |
|
865 |
transfer_error: |
|
866 |
|
|
867 |
return fdctrl.data_pos; |
|
868 |
} |
|
869 |
|
|
870 |
/* Unused... */ |
|
871 |
static int fdctrl_misc_handler (int duknwo) |
|
872 |
{ |
|
873 |
return -1; |
|
874 |
} |
|
875 |
|
|
876 |
/* Data register : 0x05 */ |
|
877 |
static uint32_t fdctrl_read_data (CPUState *env, uint32_t reg) |
|
878 |
{ |
|
879 |
fdrive_t *cur_drv, *drv0, *drv1; |
|
880 |
uint32_t retval = 0; |
|
881 |
int pos, len; |
|
882 |
|
|
883 |
fdctrl_reset_irq(); |
|
884 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
|
885 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
|
886 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
887 |
fdctrl.state &= ~FD_CTRL_SLEEP; |
|
888 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_CMD) { |
|
889 |
FLOPPY_ERROR("can't read data in CMD state\n"); |
|
890 |
return 0; |
|
891 |
} |
|
892 |
pos = fdctrl.data_pos; |
|
893 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) { |
|
894 |
pos %= FD_SECTOR_LEN; |
|
895 |
if (pos == 0) { |
|
896 |
len = fdctrl.data_len - fdctrl.data_pos; |
|
897 |
if (len > FD_SECTOR_LEN) |
|
898 |
len = FD_SECTOR_LEN; |
|
899 |
bdrv_read(cur_drv->bs, fd_sector(cur_drv), |
|
900 |
fdctrl.fifo, len); |
|
901 |
} |
|
902 |
} |
|
903 |
retval = fdctrl.fifo[pos]; |
|
904 |
if (++fdctrl.data_pos == fdctrl.data_len) { |
|
905 |
fdctrl.data_pos = 0; |
|
906 |
/* Switch from transfert mode to status mode |
|
907 |
* then from status mode to command mode |
|
908 |
*/ |
|
909 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) |
|
910 |
fdctrl_stop_transfer(0x20, 0x00, 0x00); |
|
911 |
else |
|
912 |
fdctrl_reset_fifo(); |
|
913 |
} |
|
914 |
FLOPPY_DPRINTF("data register: 0x%02x\n", retval); |
|
915 |
|
|
916 |
return retval; |
|
917 |
} |
|
918 |
|
|
919 |
static void fdctrl_write_data (CPUState *env, uint32_t reg, uint32_t value) |
|
920 |
{ |
|
921 |
fdrive_t *cur_drv, *drv0, *drv1; |
|
922 |
|
|
923 |
fdctrl_reset_irq(); |
|
924 |
drv0 = &fdctrl.drives[fdctrl.bootsel]; |
|
925 |
drv1 = &fdctrl.drives[1 - fdctrl.bootsel]; |
|
926 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
927 |
/* Reset mode */ |
|
928 |
if (fdctrl.state & FD_CTRL_RESET) { |
|
929 |
FLOPPY_DPRINTF("Floppy controler in RESET state !\n"); |
|
930 |
return; |
|
931 |
} |
|
932 |
fdctrl.state &= ~FD_CTRL_SLEEP; |
|
933 |
if ((fdctrl.data_state & FD_STATE_STATE) == FD_STATE_STATUS) { |
|
934 |
FLOPPY_ERROR("can't write data in status mode\n"); |
|
935 |
return; |
|
936 |
} |
|
937 |
/* Is it write command time ? */ |
|
938 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) { |
|
939 |
/* FIFO data write */ |
|
940 |
fdctrl.fifo[fdctrl.data_pos++] = value; |
|
941 |
if (fdctrl.data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) || |
|
942 |
fdctrl.data_pos == fdctrl.data_len) { |
|
943 |
bdrv_write(cur_drv->bs, fd_sector(cur_drv), |
|
944 |
fdctrl.fifo, FD_SECTOR_LEN); |
|
945 |
} |
|
946 |
/* Switch from transfert mode to status mode |
|
947 |
* then from status mode to command mode |
|
948 |
*/ |
|
949 |
if (FD_STATE(fdctrl.data_state) == FD_STATE_DATA) |
|
950 |
fdctrl_stop_transfer(0x20, 0x00, 0x00); |
|
951 |
return; |
|
952 |
} |
|
953 |
if (fdctrl.data_pos == 0) { |
|
954 |
/* Command */ |
|
955 |
switch (value & 0x5F) { |
|
956 |
case 0x46: |
|
957 |
/* READ variants */ |
|
958 |
FLOPPY_DPRINTF("READ command\n"); |
|
959 |
/* 8 parameters cmd */ |
|
960 |
fdctrl.data_len = 9; |
|
961 |
goto enqueue; |
|
962 |
case 0x4C: |
|
963 |
/* READ_DELETED variants */ |
|
964 |
FLOPPY_DPRINTF("READ_DELETED command\n"); |
|
965 |
/* 8 parameters cmd */ |
|
966 |
fdctrl.data_len = 9; |
|
967 |
goto enqueue; |
|
968 |
case 0x50: |
|
969 |
/* SCAN_EQUAL variants */ |
|
970 |
FLOPPY_DPRINTF("SCAN_EQUAL command\n"); |
|
971 |
/* 8 parameters cmd */ |
|
972 |
fdctrl.data_len = 9; |
|
973 |
goto enqueue; |
|
974 |
case 0x56: |
|
975 |
/* VERIFY variants */ |
|
976 |
FLOPPY_DPRINTF("VERIFY command\n"); |
|
977 |
/* 8 parameters cmd */ |
|
978 |
fdctrl.data_len = 9; |
|
979 |
goto enqueue; |
|
980 |
case 0x59: |
|
981 |
/* SCAN_LOW_OR_EQUAL variants */ |
|
982 |
FLOPPY_DPRINTF("SCAN_LOW_OR_EQUAL command\n"); |
|
983 |
/* 8 parameters cmd */ |
|
984 |
fdctrl.data_len = 9; |
|
985 |
goto enqueue; |
|
986 |
case 0x5D: |
|
987 |
/* SCAN_HIGH_OR_EQUAL variants */ |
|
988 |
FLOPPY_DPRINTF("SCAN_HIGH_OR_EQUAL command\n"); |
|
989 |
/* 8 parameters cmd */ |
|
990 |
fdctrl.data_len = 9; |
|
991 |
goto enqueue; |
|
992 |
default: |
|
993 |
break; |
|
994 |
} |
|
995 |
switch (value & 0x7F) { |
|
996 |
case 0x45: |
|
997 |
/* WRITE variants */ |
|
998 |
FLOPPY_DPRINTF("WRITE command\n"); |
|
999 |
/* 8 parameters cmd */ |
|
1000 |
fdctrl.data_len = 9; |
|
1001 |
goto enqueue; |
|
1002 |
case 0x49: |
|
1003 |
/* WRITE_DELETED variants */ |
|
1004 |
FLOPPY_DPRINTF("WRITE_DELETED command\n"); |
|
1005 |
/* 8 parameters cmd */ |
|
1006 |
fdctrl.data_len = 9; |
|
1007 |
goto enqueue; |
|
1008 |
default: |
|
1009 |
break; |
|
1010 |
} |
|
1011 |
switch (value) { |
|
1012 |
case 0x03: |
|
1013 |
/* SPECIFY */ |
|
1014 |
FLOPPY_DPRINTF("SPECIFY command\n"); |
|
1015 |
/* 1 parameter cmd */ |
|
1016 |
fdctrl.data_len = 3; |
|
1017 |
goto enqueue; |
|
1018 |
case 0x04: |
|
1019 |
/* SENSE_DRIVE_STATUS */ |
|
1020 |
FLOPPY_DPRINTF("SENSE_DRIVE_STATUS command\n"); |
|
1021 |
/* 1 parameter cmd */ |
|
1022 |
fdctrl.data_len = 2; |
|
1023 |
goto enqueue; |
|
1024 |
case 0x07: |
|
1025 |
/* RECALIBRATE */ |
|
1026 |
FLOPPY_DPRINTF("RECALIBRATE command\n"); |
|
1027 |
/* 1 parameter cmd */ |
|
1028 |
fdctrl.data_len = 2; |
|
1029 |
goto enqueue; |
|
1030 |
case 0x08: |
|
1031 |
/* SENSE_INTERRUPT_STATUS */ |
|
1032 |
FLOPPY_DPRINTF("SENSE_INTERRUPT_STATUS command (%02x)\n", |
|
1033 |
fdctrl.int_status); |
|
1034 |
/* No parameters cmd: returns status if no interrupt */ |
|
1035 |
fdctrl.fifo[0] = |
|
1036 |
fdctrl.int_status | (cur_drv->head << 2) | fdctrl.cur_drv; |
|
1037 |
fdctrl.fifo[1] = cur_drv->track; |
|
1038 |
fdctrl_set_fifo(2, 0); |
|
1039 |
return; |
|
1040 |
case 0x0E: |
|
1041 |
/* DUMPREG */ |
|
1042 |
FLOPPY_DPRINTF("DUMPREG command\n"); |
|
1043 |
/* Drives position */ |
|
1044 |
fdctrl.fifo[0] = drv0->track; |
|
1045 |
fdctrl.fifo[1] = drv1->track; |
|
1046 |
fdctrl.fifo[2] = 0; |
|
1047 |
fdctrl.fifo[3] = 0; |
|
1048 |
/* timers */ |
|
1049 |
fdctrl.fifo[4] = fdctrl.timer0; |
|
1050 |
fdctrl.fifo[5] = (fdctrl.timer1 << 1) | fdctrl.dma_en; |
|
1051 |
fdctrl.fifo[6] = cur_drv->last_sect; |
|
1052 |
fdctrl.fifo[7] = (fdctrl.lock << 7) | |
|
1053 |
(cur_drv->perpendicular << 2); |
|
1054 |
fdctrl.fifo[8] = fdctrl.config; |
|
1055 |
fdctrl.fifo[9] = fdctrl.precomp_trk; |
|
1056 |
fdctrl_set_fifo(10, 0); |
|
1057 |
return; |
|
1058 |
case 0x0F: |
|
1059 |
/* SEEK */ |
|
1060 |
FLOPPY_DPRINTF("SEEK command\n"); |
|
1061 |
/* 2 parameters cmd */ |
|
1062 |
fdctrl.data_len = 3; |
|
1063 |
goto enqueue; |
|
1064 |
case 0x10: |
|
1065 |
/* VERSION */ |
|
1066 |
FLOPPY_DPRINTF("VERSION command\n"); |
|
1067 |
/* No parameters cmd */ |
|
1068 |
/* Controler's version */ |
|
1069 |
fdctrl.fifo[0] = fdctrl.version; |
|
1070 |
fdctrl_set_fifo(1, 1); |
|
1071 |
return; |
|
1072 |
case 0x12: |
|
1073 |
/* PERPENDICULAR_MODE */ |
|
1074 |
FLOPPY_DPRINTF("PERPENDICULAR_MODE command\n"); |
|
1075 |
/* 1 parameter cmd */ |
|
1076 |
fdctrl.data_len = 2; |
|
1077 |
goto enqueue; |
|
1078 |
case 0x13: |
|
1079 |
/* CONFIGURE */ |
|
1080 |
FLOPPY_DPRINTF("CONFIGURE command\n"); |
|
1081 |
/* 3 parameters cmd */ |
|
1082 |
fdctrl.data_len = 4; |
|
1083 |
goto enqueue; |
|
1084 |
case 0x14: |
|
1085 |
/* UNLOCK */ |
|
1086 |
FLOPPY_DPRINTF("UNLOCK command\n"); |
|
1087 |
/* No parameters cmd */ |
|
1088 |
fdctrl.lock = 0; |
|
1089 |
fdctrl.fifo[0] = 0; |
|
1090 |
fdctrl_set_fifo(1, 0); |
|
1091 |
return; |
|
1092 |
case 0x17: |
|
1093 |
/* POWERDOWN_MODE */ |
|
1094 |
FLOPPY_DPRINTF("POWERDOWN_MODE command\n"); |
|
1095 |
/* 2 parameters cmd */ |
|
1096 |
fdctrl.data_len = 3; |
|
1097 |
goto enqueue; |
|
1098 |
case 0x18: |
|
1099 |
/* PART_ID */ |
|
1100 |
FLOPPY_DPRINTF("PART_ID command\n"); |
|
1101 |
/* No parameters cmd */ |
|
1102 |
fdctrl.fifo[0] = 0x41; /* Stepping 1 */ |
|
1103 |
fdctrl_set_fifo(1, 0); |
|
1104 |
return; |
|
1105 |
case 0x2C: |
|
1106 |
/* SAVE */ |
|
1107 |
FLOPPY_DPRINTF("SAVE command\n"); |
|
1108 |
/* No parameters cmd */ |
|
1109 |
fdctrl.fifo[0] = 0; |
|
1110 |
fdctrl.fifo[1] = 0; |
|
1111 |
/* Drives position */ |
|
1112 |
fdctrl.fifo[2] = drv0->track; |
|
1113 |
fdctrl.fifo[3] = drv1->track; |
|
1114 |
fdctrl.fifo[4] = 0; |
|
1115 |
fdctrl.fifo[5] = 0; |
|
1116 |
/* timers */ |
|
1117 |
fdctrl.fifo[6] = fdctrl.timer0; |
|
1118 |
fdctrl.fifo[7] = fdctrl.timer1; |
|
1119 |
fdctrl.fifo[8] = cur_drv->last_sect; |
|
1120 |
fdctrl.fifo[9] = (fdctrl.lock << 7) | |
|
1121 |
(cur_drv->perpendicular << 2); |
|
1122 |
fdctrl.fifo[10] = fdctrl.config; |
|
1123 |
fdctrl.fifo[11] = fdctrl.precomp_trk; |
|
1124 |
fdctrl.fifo[12] = fdctrl.pwrd; |
|
1125 |
fdctrl.fifo[13] = 0; |
|
1126 |
fdctrl.fifo[14] = 0; |
|
1127 |
fdctrl_set_fifo(15, 1); |
|
1128 |
return; |
|
1129 |
case 0x33: |
|
1130 |
/* OPTION */ |
|
1131 |
FLOPPY_DPRINTF("OPTION command\n"); |
|
1132 |
/* 1 parameter cmd */ |
|
1133 |
fdctrl.data_len = 2; |
|
1134 |
goto enqueue; |
|
1135 |
case 0x42: |
|
1136 |
/* READ_TRACK */ |
|
1137 |
FLOPPY_DPRINTF("READ_TRACK command\n"); |
|
1138 |
/* 8 parameters cmd */ |
|
1139 |
fdctrl.data_len = 9; |
|
1140 |
goto enqueue; |
|
1141 |
case 0x4A: |
|
1142 |
/* READ_ID */ |
|
1143 |
FLOPPY_DPRINTF("READ_ID command\n"); |
|
1144 |
/* 1 parameter cmd */ |
|
1145 |
fdctrl.data_len = 2; |
|
1146 |
goto enqueue; |
|
1147 |
case 0x4C: |
|
1148 |
/* RESTORE */ |
|
1149 |
FLOPPY_DPRINTF("RESTORE command\n"); |
|
1150 |
/* 17 parameters cmd */ |
|
1151 |
fdctrl.data_len = 18; |
|
1152 |
goto enqueue; |
|
1153 |
case 0x4D: |
|
1154 |
/* FORMAT_TRACK */ |
|
1155 |
FLOPPY_DPRINTF("FORMAT_TRACK command\n"); |
|
1156 |
/* 5 parameters cmd */ |
|
1157 |
fdctrl.data_len = 9; |
|
1158 |
goto enqueue; |
|
1159 |
case 0x8E: |
|
1160 |
/* DRIVE_SPECIFICATION_COMMAND */ |
|
1161 |
FLOPPY_DPRINTF("DRIVE_SPECIFICATION_COMMAND command\n"); |
|
1162 |
/* 5 parameters cmd */ |
|
1163 |
fdctrl.data_len = 6; |
|
1164 |
goto enqueue; |
|
1165 |
case 0x8F: |
|
1166 |
/* RELATIVE_SEEK_OUT */ |
|
1167 |
FLOPPY_DPRINTF("RELATIVE_SEEK_OUT command\n"); |
|
1168 |
/* 2 parameters cmd */ |
|
1169 |
fdctrl.data_len = 3; |
|
1170 |
goto enqueue; |
|
1171 |
case 0x94: |
|
1172 |
/* LOCK */ |
|
1173 |
FLOPPY_DPRINTF("LOCK command\n"); |
|
1174 |
/* No parameters cmd */ |
|
1175 |
fdctrl.lock = 1; |
|
1176 |
fdctrl.fifo[0] = 0x10; |
|
1177 |
fdctrl_set_fifo(1, 1); |
|
1178 |
return; |
|
1179 |
case 0xCD: |
|
1180 |
/* FORMAT_AND_WRITE */ |
|
1181 |
FLOPPY_DPRINTF("FORMAT_AND_WRITE command\n"); |
|
1182 |
/* 10 parameters cmd */ |
|
1183 |
fdctrl.data_len = 11; |
|
1184 |
goto enqueue; |
|
1185 |
case 0xCF: |
|
1186 |
/* RELATIVE_SEEK_IN */ |
|
1187 |
FLOPPY_DPRINTF("RELATIVE_SEEK_IN command\n"); |
|
1188 |
/* 2 parameters cmd */ |
|
1189 |
fdctrl.data_len = 3; |
|
1190 |
goto enqueue; |
|
1191 |
default: |
|
1192 |
/* Unknown command */ |
|
1193 |
FLOPPY_ERROR("unknown command: 0x%02x\n", value); |
|
1194 |
fdctrl_unimplemented(); |
|
1195 |
return; |
|
1196 |
} |
|
1197 |
} |
|
1198 |
enqueue: |
|
1199 |
fdctrl.fifo[fdctrl.data_pos] = value; |
|
1200 |
if (++fdctrl.data_pos == fdctrl.data_len) { |
|
1201 |
/* We now have all parameters |
|
1202 |
* and will be able to treat the command |
|
1203 |
*/ |
|
1204 |
switch (fdctrl.fifo[0] & 0x1F) { |
|
1205 |
case 0x06: |
|
1206 |
{ |
|
1207 |
/* READ variants */ |
|
1208 |
FLOPPY_DPRINTF("treat READ command\n"); |
|
1209 |
fdctrl_start_transfer(FD_DIR_READ); |
|
1210 |
return; |
|
1211 |
} |
|
1212 |
case 0x0C: |
|
1213 |
/* READ_DELETED variants */ |
|
1214 |
// FLOPPY_DPRINTF("treat READ_DELETED command\n"); |
|
1215 |
FLOPPY_ERROR("treat READ_DELETED command\n"); |
|
1216 |
fdctrl_start_transfer_del(1); |
|
1217 |
return; |
|
1218 |
case 0x16: |
|
1219 |
/* VERIFY variants */ |
|
1220 |
// FLOPPY_DPRINTF("treat VERIFY command\n"); |
|
1221 |
FLOPPY_ERROR("treat VERIFY command\n"); |
|
1222 |
fdctrl_stop_transfer(0x20, 0x00, 0x00); |
|
1223 |
return; |
|
1224 |
case 0x10: |
|
1225 |
/* SCAN_EQUAL variants */ |
|
1226 |
// FLOPPY_DPRINTF("treat SCAN_EQUAL command\n"); |
|
1227 |
FLOPPY_ERROR("treat SCAN_EQUAL command\n"); |
|
1228 |
fdctrl_start_transfer(FD_DIR_SCANE); |
|
1229 |
return; |
|
1230 |
case 0x19: |
|
1231 |
/* SCAN_LOW_OR_EQUAL variants */ |
|
1232 |
// FLOPPY_DPRINTF("treat SCAN_LOW_OR_EQUAL command\n"); |
|
1233 |
FLOPPY_ERROR("treat SCAN_LOW_OR_EQUAL command\n"); |
|
1234 |
fdctrl_start_transfer(FD_DIR_SCANL); |
|
1235 |
return; |
|
1236 |
case 0x1D: |
|
1237 |
/* SCAN_HIGH_OR_EQUAL variants */ |
|
1238 |
// FLOPPY_DPRINTF("treat SCAN_HIGH_OR_EQUAL command\n"); |
|
1239 |
FLOPPY_ERROR("treat SCAN_HIGH_OR_EQUAL command\n"); |
|
1240 |
fdctrl_start_transfer(FD_DIR_SCANH); |
|
1241 |
return; |
|
1242 |
default: |
|
1243 |
break; |
|
1244 |
} |
|
1245 |
switch (fdctrl.fifo[0] & 0x3F) { |
|
1246 |
case 0x05: |
|
1247 |
/* WRITE variants */ |
|
1248 |
FLOPPY_DPRINTF("treat WRITE command (%02x)\n", fdctrl.fifo[0]); |
|
1249 |
fdctrl_start_transfer(FD_DIR_WRITE); |
|
1250 |
return; |
|
1251 |
case 0x09: |
|
1252 |
/* WRITE_DELETED variants */ |
|
1253 |
// FLOPPY_DPRINTF("treat WRITE_DELETED command\n"); |
|
1254 |
FLOPPY_ERROR("treat WRITE_DELETED command\n"); |
|
1255 |
fdctrl_start_transfer_del(FD_DIR_WRITE); |
|
1256 |
return; |
|
1257 |
default: |
|
1258 |
break; |
|
1259 |
} |
|
1260 |
switch (fdctrl.fifo[0]) { |
|
1261 |
case 0x03: |
|
1262 |
/* SPECIFY */ |
|
1263 |
FLOPPY_DPRINTF("treat SPECIFY command\n"); |
|
1264 |
fdctrl.timer0 = (fdctrl.fifo[1] >> 4) & 0xF; |
|
1265 |
fdctrl.timer1 = fdctrl.fifo[1] >> 1; |
|
1266 |
/* No result back */ |
|
1267 |
fdctrl_reset_fifo(); |
|
1268 |
break; |
|
1269 |
case 0x04: |
|
1270 |
/* SENSE_DRIVE_STATUS */ |
|
1271 |
FLOPPY_DPRINTF("treat SENSE_DRIVE_STATUS command\n"); |
|
1272 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
|
1273 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
1274 |
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
|
1275 |
/* 1 Byte status back */ |
|
1276 |
fdctrl.fifo[0] = (cur_drv->ro << 6) | |
|
1277 |
(cur_drv->track == 0 ? 0x10 : 0x00) | |
|
1278 |
fdctrl.cur_drv; |
|
1279 |
fdctrl_set_fifo(1, 0); |
|
1280 |
break; |
|
1281 |
case 0x07: |
|
1282 |
/* RECALIBRATE */ |
|
1283 |
FLOPPY_DPRINTF("treat RECALIBRATE command\n"); |
|
1284 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
|
1285 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
1286 |
fd_recalibrate(cur_drv); |
|
1287 |
fdctrl_reset_fifo(); |
|
1288 |
/* Raise Interrupt */ |
|
1289 |
fdctrl_raise_irq(0x20); |
|
1290 |
break; |
|
1291 |
case 0x0F: |
|
1292 |
/* SEEK */ |
|
1293 |
FLOPPY_DPRINTF("treat SEEK command\n"); |
|
1294 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
|
1295 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
1296 |
if (fdctrl.fifo[2] <= cur_drv->track) |
|
1297 |
cur_drv->dir = 1; |
|
1298 |
else |
|
1299 |
cur_drv->dir = 0; |
|
1300 |
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
|
1301 |
if (fdctrl.fifo[2] > cur_drv->max_track) { |
|
1302 |
fdctrl_raise_irq(0x60); |
|
1303 |
} else { |
|
1304 |
cur_drv->track = fdctrl.fifo[2]; |
|
1305 |
fdctrl_reset_fifo(); |
|
1306 |
/* Raise Interrupt */ |
|
1307 |
fdctrl_raise_irq(0x20); |
|
1308 |
} |
|
1309 |
break; |
|
1310 |
case 0x12: |
|
1311 |
/* PERPENDICULAR_MODE */ |
|
1312 |
FLOPPY_DPRINTF("treat PERPENDICULAR_MODE command\n"); |
|
1313 |
if (fdctrl.fifo[1] & 0x80) |
|
1314 |
cur_drv->perpendicular = fdctrl.fifo[1] & 0x7; |
|
1315 |
/* No result back */ |
|
1316 |
fdctrl_reset_fifo(); |
|
1317 |
break; |
|
1318 |
case 0x13: |
|
1319 |
/* CONFIGURE */ |
|
1320 |
FLOPPY_DPRINTF("treat CONFIGURE command\n"); |
|
1321 |
fdctrl.config = fdctrl.fifo[2]; |
|
1322 |
fdctrl.precomp_trk = fdctrl.fifo[3]; |
|
1323 |
/* No result back */ |
|
1324 |
fdctrl_reset_fifo(); |
|
1325 |
break; |
|
1326 |
case 0x17: |
|
1327 |
/* POWERDOWN_MODE */ |
|
1328 |
FLOPPY_DPRINTF("treat POWERDOWN_MODE command\n"); |
|
1329 |
fdctrl.pwrd = fdctrl.fifo[1]; |
|
1330 |
fdctrl.fifo[0] = fdctrl.fifo[1]; |
|
1331 |
fdctrl_set_fifo(1, 1); |
|
1332 |
break; |
|
1333 |
case 0x33: |
|
1334 |
/* OPTION */ |
|
1335 |
FLOPPY_DPRINTF("treat OPTION command\n"); |
|
1336 |
/* No result back */ |
|
1337 |
fdctrl_reset_fifo(); |
|
1338 |
break; |
|
1339 |
case 0x42: |
|
1340 |
/* READ_TRACK */ |
|
1341 |
// FLOPPY_DPRINTF("treat READ_TRACK command\n"); |
|
1342 |
FLOPPY_ERROR("treat READ_TRACK command\n"); |
|
1343 |
fdctrl_unimplemented(); |
|
1344 |
break; |
|
1345 |
case 0x4A: |
|
1346 |
/* READ_ID */ |
|
1347 |
// FLOPPY_DPRINTF("treat READ_ID command\n"); |
|
1348 |
FLOPPY_ERROR("treat READ_ID command\n"); |
|
1349 |
fdctrl_stop_transfer(0x00, 0x00, 0x00); |
|
1350 |
break; |
|
1351 |
case 0x4C: |
|
1352 |
/* RESTORE */ |
|
1353 |
FLOPPY_DPRINTF("treat RESTORE command\n"); |
|
1354 |
/* Drives position */ |
|
1355 |
drv0->track = fdctrl.fifo[3]; |
|
1356 |
drv1->track = fdctrl.fifo[4]; |
|
1357 |
/* timers */ |
|
1358 |
fdctrl.timer0 = fdctrl.fifo[7]; |
|
1359 |
fdctrl.timer1 = fdctrl.fifo[8]; |
|
1360 |
cur_drv->last_sect = fdctrl.fifo[9]; |
|
1361 |
fdctrl.lock = fdctrl.fifo[10] >> 7; |
|
1362 |
cur_drv->perpendicular = (fdctrl.fifo[10] >> 2) & 0xF; |
|
1363 |
fdctrl.config = fdctrl.fifo[11]; |
|
1364 |
fdctrl.precomp_trk = fdctrl.fifo[12]; |
|
1365 |
fdctrl.pwrd = fdctrl.fifo[13]; |
|
1366 |
fdctrl_reset_fifo(); |
|
1367 |
break; |
|
1368 |
case 0x4D: |
|
1369 |
/* FORMAT_TRACK */ |
|
1370 |
// FLOPPY_DPRINTF("treat FORMAT_TRACK command\n"); |
|
1371 |
FLOPPY_ERROR("treat FORMAT_TRACK command\n"); |
|
1372 |
fdctrl_unimplemented(); |
|
1373 |
break; |
|
1374 |
case 0x8E: |
|
1375 |
/* DRIVE_SPECIFICATION_COMMAND */ |
|
1376 |
FLOPPY_DPRINTF("treat DRIVE_SPECIFICATION_COMMAND command\n"); |
|
1377 |
if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x80) { |
|
1378 |
/* Command parameters done */ |
|
1379 |
if (fdctrl.fifo[fdctrl.data_pos - 1] & 0x40) { |
|
1380 |
fdctrl.fifo[0] = fdctrl.fifo[1]; |
|
1381 |
fdctrl.fifo[2] = 0; |
|
1382 |
fdctrl.fifo[3] = 0; |
|
1383 |
fdctrl_set_fifo(4, 1); |
|
1384 |
} else { |
|
1385 |
fdctrl_reset_fifo(); |
|
1386 |
} |
|
1387 |
} else if (fdctrl.data_len > 7) { |
|
1388 |
/* ERROR */ |
|
1389 |
fdctrl.fifo[0] = 0x80 | |
|
1390 |
(cur_drv->head << 2) | fdctrl.cur_drv; |
|
1391 |
fdctrl_set_fifo(1, 1); |
|
1392 |
} |
|
1393 |
break; |
|
1394 |
case 0x8F: |
|
1395 |
/* RELATIVE_SEEK_OUT */ |
|
1396 |
FLOPPY_DPRINTF("treat RELATIVE_SEEK_OUT command\n"); |
|
1397 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
|
1398 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
1399 |
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
|
1400 |
if (fdctrl.fifo[2] + cur_drv->track > cur_drv->max_track) { |
|
1401 |
/* ERROR */ |
|
1402 |
fdctrl_raise_irq(0x70); |
|
1403 |
} else { |
|
1404 |
cur_drv->track += fdctrl.fifo[2]; |
|
1405 |
cur_drv->dir = 0; |
|
1406 |
fdctrl_reset_fifo(); |
|
1407 |
fdctrl_raise_irq(0x20); |
|
1408 |
} |
|
1409 |
break; |
|
1410 |
case 0xCD: |
|
1411 |
/* FORMAT_AND_WRITE */ |
|
1412 |
// FLOPPY_DPRINTF("treat FORMAT_AND_WRITE command\n"); |
|
1413 |
FLOPPY_ERROR("treat FORMAT_AND_WRITE command\n"); |
|
1414 |
fdctrl_unimplemented(); |
|
1415 |
break; |
|
1416 |
case 0xCF: |
|
1417 |
/* RELATIVE_SEEK_IN */ |
|
1418 |
FLOPPY_DPRINTF("treat RELATIVE_SEEK_IN command\n"); |
|
1419 |
fdctrl.cur_drv = fdctrl.fifo[1] & 1; |
|
1420 |
cur_drv = fdctrl.cur_drv == 0 ? drv0 : drv1; |
|
1421 |
cur_drv->head = (fdctrl.fifo[1] >> 2) & 1; |
|
1422 |
if (fdctrl.fifo[2] > cur_drv->track) { |
|
1423 |
/* ERROR */ |
|
1424 |
fdctrl_raise_irq(0x60); |
|
1425 |
} else { |
|
1426 |
fdctrl_reset_fifo(); |
|
1427 |
cur_drv->track -= fdctrl.fifo[2]; |
|
1428 |
cur_drv->dir = 1; |
|
1429 |
/* Raise Interrupt */ |
|
1430 |
fdctrl_raise_irq(0x20); |
|
1431 |
} |
|
1432 |
break; |
|
1433 |
} |
|
1434 |
} |
|
1435 |
} |
Also available in: Unified diff