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/*
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* QEMU Floppy disk emulator (Intel 82078)
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*
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* Copyright (c) 2003, 2007 Jocelyn Mayer
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* Copyright (c) 2008 Herv? Poussineau
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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/*
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* The controller is used in Sun4m systems in a slightly different
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* way. There are changes in DOR register and DMA is not available.
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*/
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#include "hw.h" |
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#include "fdc.h" |
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#include "block.h" |
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#include "qemu-timer.h" |
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#include "isa.h" |
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/********************************************************/
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/* debug Floppy devices */
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//#define DEBUG_FLOPPY
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#ifdef DEBUG_FLOPPY
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#define FLOPPY_DPRINTF(fmt, args...) \
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do { printf("FLOPPY: " fmt , ##args); } while (0) |
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#else
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#define FLOPPY_DPRINTF(fmt, args...)
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#endif
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#define FLOPPY_ERROR(fmt, args...) \
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do { printf("FLOPPY ERROR: %s: " fmt, __func__ , ##args); } while (0) |
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/********************************************************/
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/* Floppy drive emulation */
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/* Will always be a fixed parameter for us */
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#define FD_SECTOR_LEN 512 |
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#define FD_SECTOR_SC 2 /* Sector size code */ |
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/* Floppy disk drive emulation */
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typedef enum fdisk_type_t { |
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FDRIVE_DISK_288 = 0x01, /* 2.88 MB disk */ |
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FDRIVE_DISK_144 = 0x02, /* 1.44 MB disk */ |
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FDRIVE_DISK_720 = 0x03, /* 720 kB disk */ |
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FDRIVE_DISK_USER = 0x04, /* User defined geometry */ |
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FDRIVE_DISK_NONE = 0x05, /* No disk */ |
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} fdisk_type_t; |
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typedef enum fdrive_type_t { |
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FDRIVE_DRV_144 = 0x00, /* 1.44 MB 3"5 drive */ |
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FDRIVE_DRV_288 = 0x01, /* 2.88 MB 3"5 drive */ |
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FDRIVE_DRV_120 = 0x02, /* 1.2 MB 5"25 drive */ |
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FDRIVE_DRV_NONE = 0x03, /* No drive connected */ |
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} fdrive_type_t; |
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typedef enum fdrive_flags_t { |
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FDRIVE_MOTOR_ON = 0x01, /* motor on/off */ |
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} fdrive_flags_t; |
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typedef enum fdisk_flags_t { |
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FDISK_DBL_SIDES = 0x01,
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} fdisk_flags_t; |
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typedef struct fdrive_t { |
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BlockDriverState *bs; |
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/* Drive status */
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fdrive_type_t drive; |
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fdrive_flags_t drflags; |
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uint8_t perpendicular; /* 2.88 MB access mode */
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/* Position */
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uint8_t head; |
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uint8_t track; |
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uint8_t sect; |
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/* 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_flags_t flags; |
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uint8_t last_sect; /* Nb sector per track */
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uint8_t max_track; /* Nb of tracks */
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uint16_t bps; /* Bytes per sector */
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uint8_t ro; /* Is read-only */
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} fdrive_t; |
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static void fd_init (fdrive_t *drv, BlockDriverState *bs) |
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{ |
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/* Drive */
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drv->bs = bs; |
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drv->drive = FDRIVE_DRV_NONE; |
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drv->drflags = 0;
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drv->perpendicular = 0;
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/* Disk */
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drv->last_sect = 0;
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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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int ret;
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if (track > drv->max_track ||
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(head != 0 && (drv->flags & FDISK_DBL_SIDES) == 0)) { |
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FLOPPY_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
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head, track, sect, 1,
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(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1, |
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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_DPRINTF("try to read %d %02x %02x (max=%d %d %02x %02x)\n",
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head, track, sect, 1,
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(drv->flags & FDISK_DBL_SIDES) == 0 ? 0 : 1, |
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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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ret = 0;
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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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if (drv->track != track)
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ret = 1;
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drv->track = track; |
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drv->sect = sect; |
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} |
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return ret;
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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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/* Recognize floppy formats */
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typedef struct fd_format_t { |
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fdrive_type_t drive; |
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fdisk_type_t disk; |
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uint8_t last_sect; |
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uint8_t max_track; |
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uint8_t max_head; |
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const char *str; |
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} fd_format_t; |
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static const fd_format_t fd_formats[] = { |
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/* First entry is default format */
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/* 1.44 MB 3"1/2 floppy disks */
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{ FDRIVE_DRV_144, FDRIVE_DISK_144, 18, 80, 1, "1.44 MB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_144, 20, 80, 1, "1.6 MB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 80, 1, "1.68 MB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 82, 1, "1.72 MB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_144, 21, 83, 1, "1.74 MB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_144, 22, 80, 1, "1.76 MB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_144, 23, 80, 1, "1.84 MB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_144, 24, 80, 1, "1.92 MB 3\"1/2", }, |
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/* 2.88 MB 3"1/2 floppy disks */
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{ FDRIVE_DRV_288, FDRIVE_DISK_288, 36, 80, 1, "2.88 MB 3\"1/2", }, |
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{ FDRIVE_DRV_288, FDRIVE_DISK_288, 39, 80, 1, "3.12 MB 3\"1/2", }, |
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{ FDRIVE_DRV_288, FDRIVE_DISK_288, 40, 80, 1, "3.2 MB 3\"1/2", }, |
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{ FDRIVE_DRV_288, FDRIVE_DISK_288, 44, 80, 1, "3.52 MB 3\"1/2", }, |
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{ FDRIVE_DRV_288, FDRIVE_DISK_288, 48, 80, 1, "3.84 MB 3\"1/2", }, |
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/* 720 kB 3"1/2 floppy disks */
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{ FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 1, "720 kB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 80, 1, "800 kB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 82, 1, "820 kB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_720, 10, 83, 1, "830 kB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_720, 13, 80, 1, "1.04 MB 3\"1/2", }, |
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{ FDRIVE_DRV_144, FDRIVE_DISK_720, 14, 80, 1, "1.12 MB 3\"1/2", }, |
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/* 1.2 MB 5"1/4 floppy disks */
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 15, 80, 1, "1.2 kB 5\"1/4", }, |
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 80, 1, "1.44 MB 5\"1/4", }, |
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 82, 1, "1.48 MB 5\"1/4", }, |
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 18, 83, 1, "1.49 MB 5\"1/4", }, |
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 20, 80, 1, "1.6 MB 5\"1/4", }, |
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/* 720 kB 5"1/4 floppy disks */
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 80, 1, "720 kB 5\"1/4", }, |
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 11, 80, 1, "880 kB 5\"1/4", }, |
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/* 360 kB 5"1/4 floppy disks */
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 1, "360 kB 5\"1/4", }, |
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 9, 40, 0, "180 kB 5\"1/4", }, |
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 41, 1, "410 kB 5\"1/4", }, |
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 10, 42, 1, "420 kB 5\"1/4", }, |
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/* 320 kB 5"1/4 floppy disks */
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 1, "320 kB 5\"1/4", }, |
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{ FDRIVE_DRV_120, FDRIVE_DISK_288, 8, 40, 0, "160 kB 5\"1/4", }, |
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/* 360 kB must match 5"1/4 better than 3"1/2... */
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{ FDRIVE_DRV_144, FDRIVE_DISK_720, 9, 80, 0, "360 kB 3\"1/2", }, |
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/* end */
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{ FDRIVE_DRV_NONE, FDRIVE_DISK_NONE, -1, -1, 0, NULL, }, |
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}; |
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/* Revalidate a disk drive after a disk change */
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static void fd_revalidate (fdrive_t *drv) |
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{ |
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const fd_format_t *parse;
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uint64_t nb_sectors, size; |
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int i, first_match, match;
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int nb_heads, max_track, last_sect, ro;
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FLOPPY_DPRINTF("revalidate\n");
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if (drv->bs != NULL && bdrv_is_inserted(drv->bs)) { |
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ro = bdrv_is_read_only(drv->bs); |
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bdrv_get_geometry_hint(drv->bs, &nb_heads, &max_track, &last_sect); |
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if (nb_heads != 0 && max_track != 0 && last_sect != 0) { |
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FLOPPY_DPRINTF("User defined disk (%d %d %d)",
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nb_heads - 1, max_track, last_sect);
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} else {
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bdrv_get_geometry(drv->bs, &nb_sectors); |
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match = -1;
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first_match = -1;
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for (i = 0;; i++) { |
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parse = &fd_formats[i]; |
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if (parse->drive == FDRIVE_DRV_NONE)
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break;
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if (drv->drive == parse->drive ||
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drv->drive == FDRIVE_DRV_NONE) { |
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size = (parse->max_head + 1) * parse->max_track *
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parse->last_sect; |
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if (nb_sectors == size) {
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match = i; |
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break;
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} |
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if (first_match == -1) |
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first_match = i; |
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} |
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} |
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if (match == -1) { |
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if (first_match == -1) |
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match = 1;
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else
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match = first_match; |
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parse = &fd_formats[match]; |
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} |
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nb_heads = parse->max_head + 1;
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max_track = parse->max_track; |
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last_sect = parse->last_sect; |
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drv->drive = parse->drive; |
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FLOPPY_DPRINTF("%s floppy disk (%d h %d t %d s) %s\n", parse->str,
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nb_heads, max_track, last_sect, ro ? "ro" : "rw"); |
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} |
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if (nb_heads == 1) { |
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drv->flags &= ~FDISK_DBL_SIDES; |
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} else {
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drv->flags |= FDISK_DBL_SIDES; |
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} |
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drv->max_track = max_track; |
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drv->last_sect = last_sect; |
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drv->ro = ro; |
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} else {
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FLOPPY_DPRINTF("No disk in drive\n");
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drv->last_sect = 0;
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drv->max_track = 0;
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drv->flags &= ~FDISK_DBL_SIDES; |
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} |
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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->drflags |= FDRIVE_MOTOR_ON; |
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} |
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static void fd_stop (fdrive_t *drv) |
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{ |
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drv->drflags &= ~FDRIVE_MOTOR_ON; |
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} |
309 |
|
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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); |
315 |
} |
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|
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/********************************************************/
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/* Intel 82078 floppy disk controller emulation */
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|
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static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq); |
321 |
static void fdctrl_reset_fifo (fdctrl_t *fdctrl); |
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static int fdctrl_transfer_handler (void *opaque, int nchan, |
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int dma_pos, int dma_len); |
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static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status); |
325 |
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static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl);
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static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl);
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static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value); |
329 |
static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl);
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static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value); |
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static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl);
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static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value); |
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static uint32_t fdctrl_read_data (fdctrl_t *fdctrl);
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static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value); |
335 |
static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl);
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336 |
|
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enum {
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FD_CTRL_ACTIVE = 0x01, /* XXX: suppress that */ |
339 |
FD_CTRL_RESET = 0x02,
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340 |
FD_CTRL_SLEEP = 0x04, /* XXX: suppress that */ |
341 |
FD_CTRL_BUSY = 0x08, /* dma transfer in progress */ |
342 |
FD_CTRL_INTR = 0x10,
|
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}; |
344 |
|
345 |
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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350 |
FD_DIR_SCANH = 4,
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}; |
352 |
|
353 |
enum {
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354 |
FD_STATE_CMD = 0x00,
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355 |
FD_STATE_STATUS = 0x01,
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356 |
FD_STATE_DATA = 0x02,
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357 |
FD_STATE_STATE = 0x03,
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358 |
FD_STATE_MULTI = 0x10,
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359 |
FD_STATE_SEEK = 0x20,
|
360 |
FD_STATE_FORMAT = 0x40,
|
361 |
}; |
362 |
|
363 |
enum {
|
364 |
FD_REG_0 = 0x00,
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365 |
FD_REG_STATUSB = 0x01,
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366 |
FD_REG_DOR = 0x02,
|
367 |
FD_REG_TDR = 0x03,
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368 |
FD_REG_MSR = 0x04,
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369 |
FD_REG_DSR = 0x04,
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370 |
FD_REG_FIFO = 0x05,
|
371 |
FD_REG_DIR = 0x07,
|
372 |
}; |
373 |
|
374 |
enum {
|
375 |
FD_CMD_READ_TRACK = 0x02,
|
376 |
FD_CMD_SPECIFY = 0x03,
|
377 |
FD_CMD_SENSE_DRIVE_STATUS = 0x04,
|
378 |
FD_CMD_WRITE = 0x05,
|
379 |
FD_CMD_READ = 0x06,
|
380 |
FD_CMD_RECALIBRATE = 0x07,
|
381 |
FD_CMD_SENSE_INTERRUPT_STATUS = 0x08,
|
382 |
FD_CMD_WRITE_DELETED = 0x09,
|
383 |
FD_CMD_READ_ID = 0x0a,
|
384 |
FD_CMD_READ_DELETED = 0x0c,
|
385 |
FD_CMD_FORMAT_TRACK = 0x0d,
|
386 |
FD_CMD_DUMPREG = 0x0e,
|
387 |
FD_CMD_SEEK = 0x0f,
|
388 |
FD_CMD_VERSION = 0x10,
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389 |
FD_CMD_SCAN_EQUAL = 0x11,
|
390 |
FD_CMD_PERPENDICULAR_MODE = 0x12,
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FD_CMD_CONFIGURE = 0x13,
|
392 |
FD_CMD_LOCK = 0x14,
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393 |
FD_CMD_VERIFY = 0x16,
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394 |
FD_CMD_POWERDOWN_MODE = 0x17,
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395 |
FD_CMD_PART_ID = 0x18,
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396 |
FD_CMD_SCAN_LOW_OR_EQUAL = 0x19,
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397 |
FD_CMD_SCAN_HIGH_OR_EQUAL = 0x1d,
|
398 |
FD_CMD_SAVE = 0x2c,
|
399 |
FD_CMD_OPTION = 0x33,
|
400 |
FD_CMD_RESTORE = 0x4c,
|
401 |
FD_CMD_DRIVE_SPECIFICATION_COMMAND = 0x8e,
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402 |
FD_CMD_RELATIVE_SEEK_OUT = 0x8f,
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FD_CMD_FORMAT_AND_WRITE = 0xcd,
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FD_CMD_RELATIVE_SEEK_IN = 0xcf,
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}; |
406 |
|
407 |
enum {
|
408 |
FD_CONFIG_PRETRK = 0xff, /* Pre-compensation set to track 0 */ |
409 |
FD_CONFIG_FIFOTHR = 0x0f, /* FIFO threshold set to 1 byte */ |
410 |
FD_CONFIG_POLL = 0x10, /* Poll enabled */ |
411 |
FD_CONFIG_EFIFO = 0x20, /* FIFO disabled */ |
412 |
FD_CONFIG_EIS = 0x40, /* No implied seeks */ |
413 |
}; |
414 |
|
415 |
enum {
|
416 |
FD_SR0_EQPMT = 0x10,
|
417 |
FD_SR0_SEEK = 0x20,
|
418 |
FD_SR0_ABNTERM = 0x40,
|
419 |
FD_SR0_INVCMD = 0x80,
|
420 |
FD_SR0_RDYCHG = 0xc0,
|
421 |
}; |
422 |
|
423 |
enum {
|
424 |
FD_DOR_SELMASK = 0x01,
|
425 |
FD_DOR_nRESET = 0x04,
|
426 |
FD_DOR_DMAEN = 0x08,
|
427 |
FD_DOR_MOTEN0 = 0x10,
|
428 |
FD_DOR_MOTEN1 = 0x20,
|
429 |
FD_DOR_MOTEN2 = 0x40,
|
430 |
FD_DOR_MOTEN3 = 0x80,
|
431 |
}; |
432 |
|
433 |
enum {
|
434 |
FD_TDR_BOOTSEL = 0x0c,
|
435 |
}; |
436 |
|
437 |
enum {
|
438 |
FD_DSR_DRATEMASK= 0x03,
|
439 |
FD_DSR_PWRDOWN = 0x40,
|
440 |
FD_DSR_SWRESET = 0x80,
|
441 |
}; |
442 |
|
443 |
enum {
|
444 |
FD_MSR_DRV0BUSY = 0x01,
|
445 |
FD_MSR_DRV1BUSY = 0x02,
|
446 |
FD_MSR_DRV2BUSY = 0x04,
|
447 |
FD_MSR_DRV3BUSY = 0x08,
|
448 |
FD_MSR_CMDBUSY = 0x10,
|
449 |
FD_MSR_NONDMA = 0x20,
|
450 |
FD_MSR_DIO = 0x40,
|
451 |
FD_MSR_RQM = 0x80,
|
452 |
}; |
453 |
|
454 |
enum {
|
455 |
FD_DIR_DSKCHG = 0x80,
|
456 |
}; |
457 |
|
458 |
#define FD_STATE(state) ((state) & FD_STATE_STATE)
|
459 |
#define FD_SET_STATE(state, new_state) \
|
460 |
do { (state) = ((state) & ~FD_STATE_STATE) | (new_state); } while (0) |
461 |
#define FD_MULTI_TRACK(state) ((state) & FD_STATE_MULTI)
|
462 |
#define FD_DID_SEEK(state) ((state) & FD_STATE_SEEK)
|
463 |
#define FD_FORMAT_CMD(state) ((state) & FD_STATE_FORMAT)
|
464 |
|
465 |
struct fdctrl_t {
|
466 |
fdctrl_t *fdctrl; |
467 |
/* Controller's identification */
|
468 |
uint8_t version; |
469 |
/* HW */
|
470 |
qemu_irq irq; |
471 |
int dma_chann;
|
472 |
target_phys_addr_t io_base; |
473 |
/* Controller state */
|
474 |
QEMUTimer *result_timer; |
475 |
uint8_t state; |
476 |
uint8_t dma_en; |
477 |
uint8_t cur_drv; |
478 |
uint8_t bootsel; |
479 |
/* Command FIFO */
|
480 |
uint8_t *fifo; |
481 |
uint32_t data_pos; |
482 |
uint32_t data_len; |
483 |
uint8_t data_state; |
484 |
uint8_t data_dir; |
485 |
uint8_t int_status; |
486 |
uint8_t eot; /* last wanted sector */
|
487 |
/* States kept only to be returned back */
|
488 |
/* Timers state */
|
489 |
uint8_t timer0; |
490 |
uint8_t timer1; |
491 |
/* precompensation */
|
492 |
uint8_t precomp_trk; |
493 |
uint8_t config; |
494 |
uint8_t lock; |
495 |
/* Power down config (also with status regB access mode */
|
496 |
uint8_t pwrd; |
497 |
/* Sun4m quirks? */
|
498 |
int sun4m;
|
499 |
/* Floppy drives */
|
500 |
fdrive_t drives[2];
|
501 |
}; |
502 |
|
503 |
static uint32_t fdctrl_read (void *opaque, uint32_t reg) |
504 |
{ |
505 |
fdctrl_t *fdctrl = opaque; |
506 |
uint32_t retval; |
507 |
|
508 |
switch (reg & 0x07) { |
509 |
case FD_REG_0:
|
510 |
if (fdctrl->sun4m) {
|
511 |
// Identify to Linux as S82078B
|
512 |
retval = fdctrl_read_statusB(fdctrl); |
513 |
} else {
|
514 |
retval = (uint32_t)(-1);
|
515 |
} |
516 |
break;
|
517 |
case FD_REG_STATUSB:
|
518 |
retval = fdctrl_read_statusB(fdctrl); |
519 |
break;
|
520 |
case FD_REG_DOR:
|
521 |
retval = fdctrl_read_dor(fdctrl); |
522 |
break;
|
523 |
case FD_REG_TDR:
|
524 |
retval = fdctrl_read_tape(fdctrl); |
525 |
break;
|
526 |
case FD_REG_MSR:
|
527 |
retval = fdctrl_read_main_status(fdctrl); |
528 |
break;
|
529 |
case FD_REG_FIFO:
|
530 |
retval = fdctrl_read_data(fdctrl); |
531 |
break;
|
532 |
case FD_REG_DIR:
|
533 |
retval = fdctrl_read_dir(fdctrl); |
534 |
break;
|
535 |
default:
|
536 |
retval = (uint32_t)(-1);
|
537 |
break;
|
538 |
} |
539 |
FLOPPY_DPRINTF("read reg%d: 0x%02x\n", reg & 7, retval); |
540 |
|
541 |
return retval;
|
542 |
} |
543 |
|
544 |
static void fdctrl_write (void *opaque, uint32_t reg, uint32_t value) |
545 |
{ |
546 |
fdctrl_t *fdctrl = opaque; |
547 |
|
548 |
FLOPPY_DPRINTF("write reg%d: 0x%02x\n", reg & 7, value); |
549 |
|
550 |
switch (reg & 0x07) { |
551 |
case FD_REG_DOR:
|
552 |
fdctrl_write_dor(fdctrl, value); |
553 |
break;
|
554 |
case FD_REG_TDR:
|
555 |
fdctrl_write_tape(fdctrl, value); |
556 |
break;
|
557 |
case FD_REG_DSR:
|
558 |
fdctrl_write_rate(fdctrl, value); |
559 |
break;
|
560 |
case FD_REG_FIFO:
|
561 |
fdctrl_write_data(fdctrl, value); |
562 |
break;
|
563 |
default:
|
564 |
break;
|
565 |
} |
566 |
} |
567 |
|
568 |
static uint32_t fdctrl_read_mem (void *opaque, target_phys_addr_t reg) |
569 |
{ |
570 |
return fdctrl_read(opaque, (uint32_t)reg);
|
571 |
} |
572 |
|
573 |
static void fdctrl_write_mem (void *opaque, |
574 |
target_phys_addr_t reg, uint32_t value) |
575 |
{ |
576 |
fdctrl_write(opaque, (uint32_t)reg, value); |
577 |
} |
578 |
|
579 |
static CPUReadMemoryFunc *fdctrl_mem_read[3] = { |
580 |
fdctrl_read_mem, |
581 |
fdctrl_read_mem, |
582 |
fdctrl_read_mem, |
583 |
}; |
584 |
|
585 |
static CPUWriteMemoryFunc *fdctrl_mem_write[3] = { |
586 |
fdctrl_write_mem, |
587 |
fdctrl_write_mem, |
588 |
fdctrl_write_mem, |
589 |
}; |
590 |
|
591 |
static CPUReadMemoryFunc *fdctrl_mem_read_strict[3] = { |
592 |
fdctrl_read_mem, |
593 |
NULL,
|
594 |
NULL,
|
595 |
}; |
596 |
|
597 |
static CPUWriteMemoryFunc *fdctrl_mem_write_strict[3] = { |
598 |
fdctrl_write_mem, |
599 |
NULL,
|
600 |
NULL,
|
601 |
}; |
602 |
|
603 |
static void fd_save (QEMUFile *f, fdrive_t *fd) |
604 |
{ |
605 |
uint8_t tmp; |
606 |
|
607 |
tmp = fd->drflags; |
608 |
qemu_put_8s(f, &tmp); |
609 |
qemu_put_8s(f, &fd->head); |
610 |
qemu_put_8s(f, &fd->track); |
611 |
qemu_put_8s(f, &fd->sect); |
612 |
qemu_put_8s(f, &fd->dir); |
613 |
qemu_put_8s(f, &fd->rw); |
614 |
} |
615 |
|
616 |
static void fdc_save (QEMUFile *f, void *opaque) |
617 |
{ |
618 |
fdctrl_t *s = opaque; |
619 |
|
620 |
qemu_put_8s(f, &s->state); |
621 |
qemu_put_8s(f, &s->dma_en); |
622 |
qemu_put_8s(f, &s->cur_drv); |
623 |
qemu_put_8s(f, &s->bootsel); |
624 |
qemu_put_buffer(f, s->fifo, FD_SECTOR_LEN); |
625 |
qemu_put_be32s(f, &s->data_pos); |
626 |
qemu_put_be32s(f, &s->data_len); |
627 |
qemu_put_8s(f, &s->data_state); |
628 |
qemu_put_8s(f, &s->data_dir); |
629 |
qemu_put_8s(f, &s->int_status); |
630 |
qemu_put_8s(f, &s->eot); |
631 |
qemu_put_8s(f, &s->timer0); |
632 |
qemu_put_8s(f, &s->timer1); |
633 |
qemu_put_8s(f, &s->precomp_trk); |
634 |
qemu_put_8s(f, &s->config); |
635 |
qemu_put_8s(f, &s->lock); |
636 |
qemu_put_8s(f, &s->pwrd); |
637 |
fd_save(f, &s->drives[0]);
|
638 |
fd_save(f, &s->drives[1]);
|
639 |
} |
640 |
|
641 |
static int fd_load (QEMUFile *f, fdrive_t *fd) |
642 |
{ |
643 |
uint8_t tmp; |
644 |
|
645 |
qemu_get_8s(f, &tmp); |
646 |
fd->drflags = tmp; |
647 |
qemu_get_8s(f, &fd->head); |
648 |
qemu_get_8s(f, &fd->track); |
649 |
qemu_get_8s(f, &fd->sect); |
650 |
qemu_get_8s(f, &fd->dir); |
651 |
qemu_get_8s(f, &fd->rw); |
652 |
|
653 |
return 0; |
654 |
} |
655 |
|
656 |
static int fdc_load (QEMUFile *f, void *opaque, int version_id) |
657 |
{ |
658 |
fdctrl_t *s = opaque; |
659 |
int ret;
|
660 |
|
661 |
if (version_id != 1) |
662 |
return -EINVAL;
|
663 |
|
664 |
qemu_get_8s(f, &s->state); |
665 |
qemu_get_8s(f, &s->dma_en); |
666 |
qemu_get_8s(f, &s->cur_drv); |
667 |
qemu_get_8s(f, &s->bootsel); |
668 |
qemu_get_buffer(f, s->fifo, FD_SECTOR_LEN); |
669 |
qemu_get_be32s(f, &s->data_pos); |
670 |
qemu_get_be32s(f, &s->data_len); |
671 |
qemu_get_8s(f, &s->data_state); |
672 |
qemu_get_8s(f, &s->data_dir); |
673 |
qemu_get_8s(f, &s->int_status); |
674 |
qemu_get_8s(f, &s->eot); |
675 |
qemu_get_8s(f, &s->timer0); |
676 |
qemu_get_8s(f, &s->timer1); |
677 |
qemu_get_8s(f, &s->precomp_trk); |
678 |
qemu_get_8s(f, &s->config); |
679 |
qemu_get_8s(f, &s->lock); |
680 |
qemu_get_8s(f, &s->pwrd); |
681 |
|
682 |
ret = fd_load(f, &s->drives[0]);
|
683 |
if (ret == 0) |
684 |
ret = fd_load(f, &s->drives[1]);
|
685 |
|
686 |
return ret;
|
687 |
} |
688 |
|
689 |
static void fdctrl_external_reset(void *opaque) |
690 |
{ |
691 |
fdctrl_t *s = opaque; |
692 |
|
693 |
fdctrl_reset(s, 0);
|
694 |
} |
695 |
|
696 |
static void fdctrl_handle_tc(void *opaque, int irq, int level) |
697 |
{ |
698 |
//fdctrl_t *s = opaque;
|
699 |
|
700 |
if (level) {
|
701 |
// XXX
|
702 |
FLOPPY_DPRINTF("TC pulsed\n");
|
703 |
} |
704 |
} |
705 |
|
706 |
/* XXX: may change if moved to bdrv */
|
707 |
int fdctrl_get_drive_type(fdctrl_t *fdctrl, int drive_num) |
708 |
{ |
709 |
return fdctrl->drives[drive_num].drive;
|
710 |
} |
711 |
|
712 |
/* Change IRQ state */
|
713 |
static void fdctrl_reset_irq (fdctrl_t *fdctrl) |
714 |
{ |
715 |
FLOPPY_DPRINTF("Reset interrupt\n");
|
716 |
qemu_set_irq(fdctrl->irq, 0);
|
717 |
fdctrl->state &= ~FD_CTRL_INTR; |
718 |
} |
719 |
|
720 |
static void fdctrl_raise_irq (fdctrl_t *fdctrl, uint8_t status) |
721 |
{ |
722 |
// Sparc mutation
|
723 |
if (fdctrl->sun4m && !fdctrl->dma_en) {
|
724 |
fdctrl->state &= ~FD_CTRL_BUSY; |
725 |
fdctrl->int_status = status; |
726 |
return;
|
727 |
} |
728 |
if (~(fdctrl->state & FD_CTRL_INTR)) {
|
729 |
qemu_set_irq(fdctrl->irq, 1);
|
730 |
fdctrl->state |= FD_CTRL_INTR; |
731 |
} |
732 |
FLOPPY_DPRINTF("Set interrupt status to 0x%02x\n", status);
|
733 |
fdctrl->int_status = status; |
734 |
} |
735 |
|
736 |
/* Reset controller */
|
737 |
static void fdctrl_reset (fdctrl_t *fdctrl, int do_irq) |
738 |
{ |
739 |
int i;
|
740 |
|
741 |
FLOPPY_DPRINTF("reset controller\n");
|
742 |
fdctrl_reset_irq(fdctrl); |
743 |
/* Initialise controller */
|
744 |
fdctrl->cur_drv = 0;
|
745 |
/* FIFO state */
|
746 |
fdctrl->data_pos = 0;
|
747 |
fdctrl->data_len = 0;
|
748 |
fdctrl->data_state = FD_STATE_CMD; |
749 |
fdctrl->data_dir = FD_DIR_WRITE; |
750 |
for (i = 0; i < MAX_FD; i++) |
751 |
fd_reset(&fdctrl->drives[i]); |
752 |
fdctrl_reset_fifo(fdctrl); |
753 |
if (do_irq)
|
754 |
fdctrl_raise_irq(fdctrl, FD_SR0_RDYCHG); |
755 |
} |
756 |
|
757 |
static inline fdrive_t *drv0 (fdctrl_t *fdctrl) |
758 |
{ |
759 |
return &fdctrl->drives[fdctrl->bootsel];
|
760 |
} |
761 |
|
762 |
static inline fdrive_t *drv1 (fdctrl_t *fdctrl) |
763 |
{ |
764 |
return &fdctrl->drives[1 - fdctrl->bootsel]; |
765 |
} |
766 |
|
767 |
static fdrive_t *get_cur_drv (fdctrl_t *fdctrl)
|
768 |
{ |
769 |
return fdctrl->cur_drv == 0 ? drv0(fdctrl) : drv1(fdctrl); |
770 |
} |
771 |
|
772 |
/* Status B register : 0x01 (read-only) */
|
773 |
static uint32_t fdctrl_read_statusB (fdctrl_t *fdctrl)
|
774 |
{ |
775 |
FLOPPY_DPRINTF("status register: 0x00\n");
|
776 |
return 0; |
777 |
} |
778 |
|
779 |
/* Digital output register : 0x02 */
|
780 |
static uint32_t fdctrl_read_dor (fdctrl_t *fdctrl)
|
781 |
{ |
782 |
uint32_t retval = 0;
|
783 |
|
784 |
/* Drive motors state indicators */
|
785 |
if (drv0(fdctrl)->drflags & FDRIVE_MOTOR_ON)
|
786 |
retval |= FD_DOR_MOTEN0; |
787 |
if (drv1(fdctrl)->drflags & FDRIVE_MOTOR_ON)
|
788 |
retval |= FD_DOR_MOTEN1; |
789 |
/* DMA enable */
|
790 |
if (fdctrl->dma_en)
|
791 |
retval |= FD_DOR_DMAEN; |
792 |
/* Reset indicator */
|
793 |
if (!(fdctrl->state & FD_CTRL_RESET))
|
794 |
retval |= FD_DOR_nRESET; |
795 |
/* Selected drive */
|
796 |
retval |= fdctrl->cur_drv; |
797 |
FLOPPY_DPRINTF("digital output register: 0x%02x\n", retval);
|
798 |
|
799 |
return retval;
|
800 |
} |
801 |
|
802 |
static void fdctrl_write_dor (fdctrl_t *fdctrl, uint32_t value) |
803 |
{ |
804 |
/* Reset mode */
|
805 |
if (fdctrl->state & FD_CTRL_RESET) {
|
806 |
if (!(value & FD_DOR_nRESET)) {
|
807 |
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
|
808 |
return;
|
809 |
} |
810 |
} |
811 |
FLOPPY_DPRINTF("digital output register set to 0x%02x\n", value);
|
812 |
/* Drive motors state indicators */
|
813 |
if (value & FD_DOR_MOTEN1)
|
814 |
fd_start(drv1(fdctrl)); |
815 |
else
|
816 |
fd_stop(drv1(fdctrl)); |
817 |
if (value & FD_DOR_MOTEN0)
|
818 |
fd_start(drv0(fdctrl)); |
819 |
else
|
820 |
fd_stop(drv0(fdctrl)); |
821 |
/* DMA enable */
|
822 |
#if 0
|
823 |
if (fdctrl->dma_chann != -1)
|
824 |
fdctrl->dma_en = value & FD_DOR_DMAEN ? 1 : 0;
|
825 |
#endif
|
826 |
/* Reset */
|
827 |
if (!(value & FD_DOR_nRESET)) {
|
828 |
if (!(fdctrl->state & FD_CTRL_RESET)) {
|
829 |
FLOPPY_DPRINTF("controller enter RESET state\n");
|
830 |
fdctrl->state |= FD_CTRL_RESET; |
831 |
} |
832 |
} else {
|
833 |
if (fdctrl->state & FD_CTRL_RESET) {
|
834 |
FLOPPY_DPRINTF("controller out of RESET state\n");
|
835 |
fdctrl_reset(fdctrl, 1);
|
836 |
fdctrl->state &= ~(FD_CTRL_RESET | FD_CTRL_SLEEP); |
837 |
} |
838 |
} |
839 |
/* Selected drive */
|
840 |
fdctrl->cur_drv = value & FD_DOR_SELMASK; |
841 |
} |
842 |
|
843 |
/* Tape drive register : 0x03 */
|
844 |
static uint32_t fdctrl_read_tape (fdctrl_t *fdctrl)
|
845 |
{ |
846 |
uint32_t retval = 0;
|
847 |
|
848 |
/* Disk boot selection indicator */
|
849 |
retval |= fdctrl->bootsel << 2;
|
850 |
/* Tape indicators: never allowed */
|
851 |
FLOPPY_DPRINTF("tape drive register: 0x%02x\n", retval);
|
852 |
|
853 |
return retval;
|
854 |
} |
855 |
|
856 |
static void fdctrl_write_tape (fdctrl_t *fdctrl, uint32_t value) |
857 |
{ |
858 |
/* Reset mode */
|
859 |
if (fdctrl->state & FD_CTRL_RESET) {
|
860 |
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
|
861 |
return;
|
862 |
} |
863 |
FLOPPY_DPRINTF("tape drive register set to 0x%02x\n", value);
|
864 |
/* Disk boot selection indicator */
|
865 |
fdctrl->bootsel = (value & FD_TDR_BOOTSEL) >> 2;
|
866 |
/* Tape indicators: never allow */
|
867 |
} |
868 |
|
869 |
/* Main status register : 0x04 (read) */
|
870 |
static uint32_t fdctrl_read_main_status (fdctrl_t *fdctrl)
|
871 |
{ |
872 |
uint32_t retval = 0;
|
873 |
|
874 |
fdctrl->state &= ~(FD_CTRL_SLEEP | FD_CTRL_RESET); |
875 |
if (!(fdctrl->state & FD_CTRL_BUSY)) {
|
876 |
/* Data transfer allowed */
|
877 |
retval |= FD_MSR_RQM; |
878 |
/* Data transfer direction indicator */
|
879 |
if (fdctrl->data_dir == FD_DIR_READ)
|
880 |
retval |= FD_MSR_DIO; |
881 |
} |
882 |
/* Should handle FD_MSR_NONDMA for SPECIFY command */
|
883 |
/* Command busy indicator */
|
884 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA ||
|
885 |
FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) |
886 |
retval |= FD_MSR_CMDBUSY; |
887 |
FLOPPY_DPRINTF("main status register: 0x%02x\n", retval);
|
888 |
|
889 |
return retval;
|
890 |
} |
891 |
|
892 |
/* Data select rate register : 0x04 (write) */
|
893 |
static void fdctrl_write_rate (fdctrl_t *fdctrl, uint32_t value) |
894 |
{ |
895 |
/* Reset mode */
|
896 |
if (fdctrl->state & FD_CTRL_RESET) {
|
897 |
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
|
898 |
return;
|
899 |
} |
900 |
FLOPPY_DPRINTF("select rate register set to 0x%02x\n", value);
|
901 |
/* Reset: autoclear */
|
902 |
if (value & FD_DSR_SWRESET) {
|
903 |
fdctrl->state |= FD_CTRL_RESET; |
904 |
fdctrl_reset(fdctrl, 1);
|
905 |
fdctrl->state &= ~FD_CTRL_RESET; |
906 |
} |
907 |
if (value & FD_DSR_PWRDOWN) {
|
908 |
fdctrl->state |= FD_CTRL_SLEEP; |
909 |
fdctrl_reset(fdctrl, 1);
|
910 |
} |
911 |
} |
912 |
|
913 |
static int fdctrl_media_changed(fdrive_t *drv) |
914 |
{ |
915 |
int ret;
|
916 |
|
917 |
if (!drv->bs)
|
918 |
return 0; |
919 |
ret = bdrv_media_changed(drv->bs); |
920 |
if (ret) {
|
921 |
fd_revalidate(drv); |
922 |
} |
923 |
return ret;
|
924 |
} |
925 |
|
926 |
/* Digital input register : 0x07 (read-only) */
|
927 |
static uint32_t fdctrl_read_dir (fdctrl_t *fdctrl)
|
928 |
{ |
929 |
uint32_t retval = 0;
|
930 |
|
931 |
if (fdctrl_media_changed(drv0(fdctrl)) ||
|
932 |
fdctrl_media_changed(drv1(fdctrl))) |
933 |
retval |= FD_DIR_DSKCHG; |
934 |
if (retval != 0) |
935 |
FLOPPY_DPRINTF("Floppy digital input register: 0x%02x\n", retval);
|
936 |
|
937 |
return retval;
|
938 |
} |
939 |
|
940 |
/* FIFO state control */
|
941 |
static void fdctrl_reset_fifo (fdctrl_t *fdctrl) |
942 |
{ |
943 |
fdctrl->data_dir = FD_DIR_WRITE; |
944 |
fdctrl->data_pos = 0;
|
945 |
FD_SET_STATE(fdctrl->data_state, FD_STATE_CMD); |
946 |
} |
947 |
|
948 |
/* Set FIFO status for the host to read */
|
949 |
static void fdctrl_set_fifo (fdctrl_t *fdctrl, int fifo_len, int do_irq) |
950 |
{ |
951 |
fdctrl->data_dir = FD_DIR_READ; |
952 |
fdctrl->data_len = fifo_len; |
953 |
fdctrl->data_pos = 0;
|
954 |
FD_SET_STATE(fdctrl->data_state, FD_STATE_STATUS); |
955 |
if (do_irq)
|
956 |
fdctrl_raise_irq(fdctrl, 0x00);
|
957 |
} |
958 |
|
959 |
/* Set an error: unimplemented/unknown command */
|
960 |
static void fdctrl_unimplemented (fdctrl_t *fdctrl, int direction) |
961 |
{ |
962 |
#if 0
|
963 |
fdrive_t *cur_drv;
|
964 |
|
965 |
cur_drv = get_cur_drv(fdctrl);
|
966 |
fdctrl->fifo[0] = FD_SR0_ABNTERM | FD_SR0_SEEK | (cur_drv->head << 2) | fdctrl->cur_drv;
|
967 |
fdctrl->fifo[1] = 0x00;
|
968 |
fdctrl->fifo[2] = 0x00;
|
969 |
fdctrl_set_fifo(fdctrl, 3, 1);
|
970 |
#else
|
971 |
// fdctrl_reset_fifo(fdctrl);
|
972 |
fdctrl->fifo[0] = FD_SR0_INVCMD;
|
973 |
fdctrl_set_fifo(fdctrl, 1, 0); |
974 |
#endif
|
975 |
} |
976 |
|
977 |
/* Seek to next sector */
|
978 |
static int fdctrl_seek_to_next_sect (fdctrl_t *fdctrl, fdrive_t *cur_drv) |
979 |
{ |
980 |
FLOPPY_DPRINTF("seek to next sector (%d %02x %02x => %d)\n",
|
981 |
cur_drv->head, cur_drv->track, cur_drv->sect, |
982 |
fd_sector(cur_drv)); |
983 |
/* XXX: cur_drv->sect >= cur_drv->last_sect should be an
|
984 |
error in fact */
|
985 |
if (cur_drv->sect >= cur_drv->last_sect ||
|
986 |
cur_drv->sect == fdctrl->eot) { |
987 |
cur_drv->sect = 1;
|
988 |
if (FD_MULTI_TRACK(fdctrl->data_state)) {
|
989 |
if (cur_drv->head == 0 && |
990 |
(cur_drv->flags & FDISK_DBL_SIDES) != 0) {
|
991 |
cur_drv->head = 1;
|
992 |
} else {
|
993 |
cur_drv->head = 0;
|
994 |
cur_drv->track++; |
995 |
if ((cur_drv->flags & FDISK_DBL_SIDES) == 0) |
996 |
return 0; |
997 |
} |
998 |
} else {
|
999 |
cur_drv->track++; |
1000 |
return 0; |
1001 |
} |
1002 |
FLOPPY_DPRINTF("seek to next track (%d %02x %02x => %d)\n",
|
1003 |
cur_drv->head, cur_drv->track, |
1004 |
cur_drv->sect, fd_sector(cur_drv)); |
1005 |
} else {
|
1006 |
cur_drv->sect++; |
1007 |
} |
1008 |
return 1; |
1009 |
} |
1010 |
|
1011 |
/* Callback for transfer end (stop or abort) */
|
1012 |
static void fdctrl_stop_transfer (fdctrl_t *fdctrl, uint8_t status0, |
1013 |
uint8_t status1, uint8_t status2) |
1014 |
{ |
1015 |
fdrive_t *cur_drv; |
1016 |
|
1017 |
cur_drv = get_cur_drv(fdctrl); |
1018 |
FLOPPY_DPRINTF("transfer status: %02x %02x %02x (%02x)\n",
|
1019 |
status0, status1, status2, |
1020 |
status0 | (cur_drv->head << 2) | fdctrl->cur_drv);
|
1021 |
fdctrl->fifo[0] = status0 | (cur_drv->head << 2) | fdctrl->cur_drv; |
1022 |
fdctrl->fifo[1] = status1;
|
1023 |
fdctrl->fifo[2] = status2;
|
1024 |
fdctrl->fifo[3] = cur_drv->track;
|
1025 |
fdctrl->fifo[4] = cur_drv->head;
|
1026 |
fdctrl->fifo[5] = cur_drv->sect;
|
1027 |
fdctrl->fifo[6] = FD_SECTOR_SC;
|
1028 |
fdctrl->data_dir = FD_DIR_READ; |
1029 |
if (fdctrl->state & FD_CTRL_BUSY) {
|
1030 |
DMA_release_DREQ(fdctrl->dma_chann); |
1031 |
fdctrl->state &= ~FD_CTRL_BUSY; |
1032 |
} |
1033 |
fdctrl_set_fifo(fdctrl, 7, 1); |
1034 |
} |
1035 |
|
1036 |
/* Prepare a data transfer (either DMA or FIFO) */
|
1037 |
static void fdctrl_start_transfer (fdctrl_t *fdctrl, int direction) |
1038 |
{ |
1039 |
fdrive_t *cur_drv; |
1040 |
uint8_t kh, kt, ks; |
1041 |
int did_seek;
|
1042 |
|
1043 |
fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
|
1044 |
cur_drv = get_cur_drv(fdctrl); |
1045 |
kt = fdctrl->fifo[2];
|
1046 |
kh = fdctrl->fifo[3];
|
1047 |
ks = fdctrl->fifo[4];
|
1048 |
FLOPPY_DPRINTF("Start transfer at %d %d %02x %02x (%d)\n",
|
1049 |
fdctrl->cur_drv, kh, kt, ks, |
1050 |
_fd_sector(kh, kt, ks, cur_drv->last_sect)); |
1051 |
did_seek = 0;
|
1052 |
switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & 0x40)) { |
1053 |
case 2: |
1054 |
/* sect too big */
|
1055 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); |
1056 |
fdctrl->fifo[3] = kt;
|
1057 |
fdctrl->fifo[4] = kh;
|
1058 |
fdctrl->fifo[5] = ks;
|
1059 |
return;
|
1060 |
case 3: |
1061 |
/* track too big */
|
1062 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x80, 0x00); |
1063 |
fdctrl->fifo[3] = kt;
|
1064 |
fdctrl->fifo[4] = kh;
|
1065 |
fdctrl->fifo[5] = ks;
|
1066 |
return;
|
1067 |
case 4: |
1068 |
/* No seek enabled */
|
1069 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); |
1070 |
fdctrl->fifo[3] = kt;
|
1071 |
fdctrl->fifo[4] = kh;
|
1072 |
fdctrl->fifo[5] = ks;
|
1073 |
return;
|
1074 |
case 1: |
1075 |
did_seek = 1;
|
1076 |
break;
|
1077 |
default:
|
1078 |
break;
|
1079 |
} |
1080 |
/* Set the FIFO state */
|
1081 |
fdctrl->data_dir = direction; |
1082 |
fdctrl->data_pos = 0;
|
1083 |
FD_SET_STATE(fdctrl->data_state, FD_STATE_DATA); /* FIFO ready for data */
|
1084 |
if (fdctrl->fifo[0] & 0x80) |
1085 |
fdctrl->data_state |= FD_STATE_MULTI; |
1086 |
else
|
1087 |
fdctrl->data_state &= ~FD_STATE_MULTI; |
1088 |
if (did_seek)
|
1089 |
fdctrl->data_state |= FD_STATE_SEEK; |
1090 |
else
|
1091 |
fdctrl->data_state &= ~FD_STATE_SEEK; |
1092 |
if (fdctrl->fifo[5] == 00) { |
1093 |
fdctrl->data_len = fdctrl->fifo[8];
|
1094 |
} else {
|
1095 |
int tmp;
|
1096 |
fdctrl->data_len = 128 << (fdctrl->fifo[5] > 7 ? 7 : fdctrl->fifo[5]); |
1097 |
tmp = (cur_drv->last_sect - ks + 1);
|
1098 |
if (fdctrl->fifo[0] & 0x80) |
1099 |
tmp += cur_drv->last_sect; |
1100 |
fdctrl->data_len *= tmp; |
1101 |
} |
1102 |
fdctrl->eot = fdctrl->fifo[6];
|
1103 |
if (fdctrl->dma_en) {
|
1104 |
int dma_mode;
|
1105 |
/* DMA transfer are enabled. Check if DMA channel is well programmed */
|
1106 |
dma_mode = DMA_get_channel_mode(fdctrl->dma_chann); |
1107 |
dma_mode = (dma_mode >> 2) & 3; |
1108 |
FLOPPY_DPRINTF("dma_mode=%d direction=%d (%d - %d)\n",
|
1109 |
dma_mode, direction, |
1110 |
(128 << fdctrl->fifo[5]) * |
1111 |
(cur_drv->last_sect - ks + 1), fdctrl->data_len);
|
1112 |
if (((direction == FD_DIR_SCANE || direction == FD_DIR_SCANL ||
|
1113 |
direction == FD_DIR_SCANH) && dma_mode == 0) ||
|
1114 |
(direction == FD_DIR_WRITE && dma_mode == 2) ||
|
1115 |
(direction == FD_DIR_READ && dma_mode == 1)) {
|
1116 |
/* No access is allowed until DMA transfer has completed */
|
1117 |
fdctrl->state |= FD_CTRL_BUSY; |
1118 |
/* Now, we just have to wait for the DMA controller to
|
1119 |
* recall us...
|
1120 |
*/
|
1121 |
DMA_hold_DREQ(fdctrl->dma_chann); |
1122 |
DMA_schedule(fdctrl->dma_chann); |
1123 |
return;
|
1124 |
} else {
|
1125 |
FLOPPY_ERROR("dma_mode=%d direction=%d\n", dma_mode, direction);
|
1126 |
} |
1127 |
} |
1128 |
FLOPPY_DPRINTF("start non-DMA transfer\n");
|
1129 |
/* IO based transfer: calculate len */
|
1130 |
fdctrl_raise_irq(fdctrl, 0x00);
|
1131 |
|
1132 |
return;
|
1133 |
} |
1134 |
|
1135 |
/* Prepare a transfer of deleted data */
|
1136 |
static void fdctrl_start_transfer_del (fdctrl_t *fdctrl, int direction) |
1137 |
{ |
1138 |
/* We don't handle deleted data,
|
1139 |
* so we don't return *ANYTHING*
|
1140 |
*/
|
1141 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); |
1142 |
} |
1143 |
|
1144 |
/* handlers for DMA transfers */
|
1145 |
static int fdctrl_transfer_handler (void *opaque, int nchan, |
1146 |
int dma_pos, int dma_len) |
1147 |
{ |
1148 |
fdctrl_t *fdctrl; |
1149 |
fdrive_t *cur_drv; |
1150 |
int len, start_pos, rel_pos;
|
1151 |
uint8_t status0 = 0x00, status1 = 0x00, status2 = 0x00; |
1152 |
|
1153 |
fdctrl = opaque; |
1154 |
if (!(fdctrl->state & FD_CTRL_BUSY)) {
|
1155 |
FLOPPY_DPRINTF("Not in DMA transfer mode !\n");
|
1156 |
return 0; |
1157 |
} |
1158 |
cur_drv = get_cur_drv(fdctrl); |
1159 |
if (fdctrl->data_dir == FD_DIR_SCANE || fdctrl->data_dir == FD_DIR_SCANL ||
|
1160 |
fdctrl->data_dir == FD_DIR_SCANH) |
1161 |
status2 = 0x04;
|
1162 |
if (dma_len > fdctrl->data_len)
|
1163 |
dma_len = fdctrl->data_len; |
1164 |
if (cur_drv->bs == NULL) { |
1165 |
if (fdctrl->data_dir == FD_DIR_WRITE)
|
1166 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); |
1167 |
else
|
1168 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); |
1169 |
len = 0;
|
1170 |
goto transfer_error;
|
1171 |
} |
1172 |
rel_pos = fdctrl->data_pos % FD_SECTOR_LEN; |
1173 |
for (start_pos = fdctrl->data_pos; fdctrl->data_pos < dma_len;) {
|
1174 |
len = dma_len - fdctrl->data_pos; |
1175 |
if (len + rel_pos > FD_SECTOR_LEN)
|
1176 |
len = FD_SECTOR_LEN - rel_pos; |
1177 |
FLOPPY_DPRINTF("copy %d bytes (%d %d %d) %d pos %d %02x "
|
1178 |
"(%d-0x%08x 0x%08x)\n", len, dma_len, fdctrl->data_pos,
|
1179 |
fdctrl->data_len, fdctrl->cur_drv, cur_drv->head, |
1180 |
cur_drv->track, cur_drv->sect, fd_sector(cur_drv), |
1181 |
fd_sector(cur_drv) * FD_SECTOR_LEN); |
1182 |
if (fdctrl->data_dir != FD_DIR_WRITE ||
|
1183 |
len < FD_SECTOR_LEN || rel_pos != 0) {
|
1184 |
/* READ & SCAN commands and realign to a sector for WRITE */
|
1185 |
if (bdrv_read(cur_drv->bs, fd_sector(cur_drv),
|
1186 |
fdctrl->fifo, 1) < 0) { |
1187 |
FLOPPY_DPRINTF("Floppy: error getting sector %d\n",
|
1188 |
fd_sector(cur_drv)); |
1189 |
/* Sure, image size is too small... */
|
1190 |
memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
|
1191 |
} |
1192 |
} |
1193 |
switch (fdctrl->data_dir) {
|
1194 |
case FD_DIR_READ:
|
1195 |
/* READ commands */
|
1196 |
DMA_write_memory (nchan, fdctrl->fifo + rel_pos, |
1197 |
fdctrl->data_pos, len); |
1198 |
break;
|
1199 |
case FD_DIR_WRITE:
|
1200 |
/* WRITE commands */
|
1201 |
DMA_read_memory (nchan, fdctrl->fifo + rel_pos, |
1202 |
fdctrl->data_pos, len); |
1203 |
if (bdrv_write(cur_drv->bs, fd_sector(cur_drv),
|
1204 |
fdctrl->fifo, 1) < 0) { |
1205 |
FLOPPY_ERROR("writting sector %d\n", fd_sector(cur_drv));
|
1206 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); |
1207 |
goto transfer_error;
|
1208 |
} |
1209 |
break;
|
1210 |
default:
|
1211 |
/* SCAN commands */
|
1212 |
{ |
1213 |
uint8_t tmpbuf[FD_SECTOR_LEN]; |
1214 |
int ret;
|
1215 |
DMA_read_memory (nchan, tmpbuf, fdctrl->data_pos, len); |
1216 |
ret = memcmp(tmpbuf, fdctrl->fifo + rel_pos, len); |
1217 |
if (ret == 0) { |
1218 |
status2 = 0x08;
|
1219 |
goto end_transfer;
|
1220 |
} |
1221 |
if ((ret < 0 && fdctrl->data_dir == FD_DIR_SCANL) || |
1222 |
(ret > 0 && fdctrl->data_dir == FD_DIR_SCANH)) {
|
1223 |
status2 = 0x00;
|
1224 |
goto end_transfer;
|
1225 |
} |
1226 |
} |
1227 |
break;
|
1228 |
} |
1229 |
fdctrl->data_pos += len; |
1230 |
rel_pos = fdctrl->data_pos % FD_SECTOR_LEN; |
1231 |
if (rel_pos == 0) { |
1232 |
/* Seek to next sector */
|
1233 |
if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv))
|
1234 |
break;
|
1235 |
} |
1236 |
} |
1237 |
end_transfer:
|
1238 |
len = fdctrl->data_pos - start_pos; |
1239 |
FLOPPY_DPRINTF("end transfer %d %d %d\n",
|
1240 |
fdctrl->data_pos, len, fdctrl->data_len); |
1241 |
if (fdctrl->data_dir == FD_DIR_SCANE ||
|
1242 |
fdctrl->data_dir == FD_DIR_SCANL || |
1243 |
fdctrl->data_dir == FD_DIR_SCANH) |
1244 |
status2 = 0x08;
|
1245 |
if (FD_DID_SEEK(fdctrl->data_state))
|
1246 |
status0 |= FD_SR0_SEEK; |
1247 |
fdctrl->data_len -= len; |
1248 |
// if (fdctrl->data_len == 0)
|
1249 |
fdctrl_stop_transfer(fdctrl, status0, status1, status2); |
1250 |
transfer_error:
|
1251 |
|
1252 |
return len;
|
1253 |
} |
1254 |
|
1255 |
/* Data register : 0x05 */
|
1256 |
static uint32_t fdctrl_read_data (fdctrl_t *fdctrl)
|
1257 |
{ |
1258 |
fdrive_t *cur_drv; |
1259 |
uint32_t retval = 0;
|
1260 |
int pos;
|
1261 |
|
1262 |
cur_drv = get_cur_drv(fdctrl); |
1263 |
fdctrl->state &= ~FD_CTRL_SLEEP; |
1264 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_CMD) {
|
1265 |
FLOPPY_ERROR("can't read data in CMD state\n");
|
1266 |
return 0; |
1267 |
} |
1268 |
pos = fdctrl->data_pos; |
1269 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
|
1270 |
pos %= FD_SECTOR_LEN; |
1271 |
if (pos == 0) { |
1272 |
if (fdctrl->data_pos != 0) |
1273 |
if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
|
1274 |
FLOPPY_DPRINTF("error seeking to next sector %d\n",
|
1275 |
fd_sector(cur_drv)); |
1276 |
return 0; |
1277 |
} |
1278 |
bdrv_read(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
|
1279 |
} |
1280 |
} |
1281 |
retval = fdctrl->fifo[pos]; |
1282 |
if (++fdctrl->data_pos == fdctrl->data_len) {
|
1283 |
fdctrl->data_pos = 0;
|
1284 |
/* Switch from transfer mode to status mode
|
1285 |
* then from status mode to command mode
|
1286 |
*/
|
1287 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
|
1288 |
fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00); |
1289 |
} else {
|
1290 |
fdctrl_reset_fifo(fdctrl); |
1291 |
fdctrl_reset_irq(fdctrl); |
1292 |
} |
1293 |
} |
1294 |
FLOPPY_DPRINTF("data register: 0x%02x\n", retval);
|
1295 |
|
1296 |
return retval;
|
1297 |
} |
1298 |
|
1299 |
static void fdctrl_format_sector (fdctrl_t *fdctrl) |
1300 |
{ |
1301 |
fdrive_t *cur_drv; |
1302 |
uint8_t kh, kt, ks; |
1303 |
int did_seek;
|
1304 |
|
1305 |
fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
|
1306 |
cur_drv = get_cur_drv(fdctrl); |
1307 |
kt = fdctrl->fifo[6];
|
1308 |
kh = fdctrl->fifo[7];
|
1309 |
ks = fdctrl->fifo[8];
|
1310 |
FLOPPY_DPRINTF("format sector at %d %d %02x %02x (%d)\n",
|
1311 |
fdctrl->cur_drv, kh, kt, ks, |
1312 |
_fd_sector(kh, kt, ks, cur_drv->last_sect)); |
1313 |
did_seek = 0;
|
1314 |
switch (fd_seek(cur_drv, kh, kt, ks, fdctrl->config & FD_CONFIG_EIS)) {
|
1315 |
case 2: |
1316 |
/* sect too big */
|
1317 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); |
1318 |
fdctrl->fifo[3] = kt;
|
1319 |
fdctrl->fifo[4] = kh;
|
1320 |
fdctrl->fifo[5] = ks;
|
1321 |
return;
|
1322 |
case 3: |
1323 |
/* track too big */
|
1324 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x80, 0x00); |
1325 |
fdctrl->fifo[3] = kt;
|
1326 |
fdctrl->fifo[4] = kh;
|
1327 |
fdctrl->fifo[5] = ks;
|
1328 |
return;
|
1329 |
case 4: |
1330 |
/* No seek enabled */
|
1331 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM, 0x00, 0x00); |
1332 |
fdctrl->fifo[3] = kt;
|
1333 |
fdctrl->fifo[4] = kh;
|
1334 |
fdctrl->fifo[5] = ks;
|
1335 |
return;
|
1336 |
case 1: |
1337 |
did_seek = 1;
|
1338 |
fdctrl->data_state |= FD_STATE_SEEK; |
1339 |
break;
|
1340 |
default:
|
1341 |
break;
|
1342 |
} |
1343 |
memset(fdctrl->fifo, 0, FD_SECTOR_LEN);
|
1344 |
if (cur_drv->bs == NULL || |
1345 |
bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1) < 0) { |
1346 |
FLOPPY_ERROR("formatting sector %d\n", fd_sector(cur_drv));
|
1347 |
fdctrl_stop_transfer(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK, 0x00, 0x00); |
1348 |
} else {
|
1349 |
if (cur_drv->sect == cur_drv->last_sect) {
|
1350 |
fdctrl->data_state &= ~FD_STATE_FORMAT; |
1351 |
/* Last sector done */
|
1352 |
if (FD_DID_SEEK(fdctrl->data_state))
|
1353 |
fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00); |
1354 |
else
|
1355 |
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); |
1356 |
} else {
|
1357 |
/* More to do */
|
1358 |
fdctrl->data_pos = 0;
|
1359 |
fdctrl->data_len = 4;
|
1360 |
} |
1361 |
} |
1362 |
} |
1363 |
|
1364 |
static void fdctrl_handle_lock (fdctrl_t *fdctrl, int direction) |
1365 |
{ |
1366 |
fdctrl->lock = (fdctrl->fifo[0] & 0x80) ? 1 : 0; |
1367 |
fdctrl->fifo[0] = fdctrl->lock << 4; |
1368 |
fdctrl_set_fifo(fdctrl, 1, fdctrl->lock);
|
1369 |
} |
1370 |
|
1371 |
static void fdctrl_handle_dumpreg (fdctrl_t *fdctrl, int direction) |
1372 |
{ |
1373 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1374 |
|
1375 |
/* Drives position */
|
1376 |
fdctrl->fifo[0] = drv0(fdctrl)->track;
|
1377 |
fdctrl->fifo[1] = drv1(fdctrl)->track;
|
1378 |
fdctrl->fifo[2] = 0; |
1379 |
fdctrl->fifo[3] = 0; |
1380 |
/* timers */
|
1381 |
fdctrl->fifo[4] = fdctrl->timer0;
|
1382 |
fdctrl->fifo[5] = (fdctrl->timer1 << 1) | fdctrl->dma_en; |
1383 |
fdctrl->fifo[6] = cur_drv->last_sect;
|
1384 |
fdctrl->fifo[7] = (fdctrl->lock << 7) | |
1385 |
(cur_drv->perpendicular << 2);
|
1386 |
fdctrl->fifo[8] = fdctrl->config;
|
1387 |
fdctrl->fifo[9] = fdctrl->precomp_trk;
|
1388 |
fdctrl_set_fifo(fdctrl, 10, 0); |
1389 |
} |
1390 |
|
1391 |
static void fdctrl_handle_version (fdctrl_t *fdctrl, int direction) |
1392 |
{ |
1393 |
/* Controller's version */
|
1394 |
fdctrl->fifo[0] = fdctrl->version;
|
1395 |
fdctrl_set_fifo(fdctrl, 1, 1); |
1396 |
} |
1397 |
|
1398 |
static void fdctrl_handle_partid (fdctrl_t *fdctrl, int direction) |
1399 |
{ |
1400 |
fdctrl->fifo[0] = 0x41; /* Stepping 1 */ |
1401 |
fdctrl_set_fifo(fdctrl, 1, 0); |
1402 |
} |
1403 |
|
1404 |
static void fdctrl_handle_restore (fdctrl_t *fdctrl, int direction) |
1405 |
{ |
1406 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1407 |
|
1408 |
/* Drives position */
|
1409 |
drv0(fdctrl)->track = fdctrl->fifo[3];
|
1410 |
drv1(fdctrl)->track = fdctrl->fifo[4];
|
1411 |
/* timers */
|
1412 |
fdctrl->timer0 = fdctrl->fifo[7];
|
1413 |
fdctrl->timer1 = fdctrl->fifo[8];
|
1414 |
cur_drv->last_sect = fdctrl->fifo[9];
|
1415 |
fdctrl->lock = fdctrl->fifo[10] >> 7; |
1416 |
cur_drv->perpendicular = (fdctrl->fifo[10] >> 2) & 0xF; |
1417 |
fdctrl->config = fdctrl->fifo[11];
|
1418 |
fdctrl->precomp_trk = fdctrl->fifo[12];
|
1419 |
fdctrl->pwrd = fdctrl->fifo[13];
|
1420 |
fdctrl_reset_fifo(fdctrl); |
1421 |
} |
1422 |
|
1423 |
static void fdctrl_handle_save (fdctrl_t *fdctrl, int direction) |
1424 |
{ |
1425 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1426 |
|
1427 |
fdctrl->fifo[0] = 0; |
1428 |
fdctrl->fifo[1] = 0; |
1429 |
/* Drives position */
|
1430 |
fdctrl->fifo[2] = drv0(fdctrl)->track;
|
1431 |
fdctrl->fifo[3] = drv1(fdctrl)->track;
|
1432 |
fdctrl->fifo[4] = 0; |
1433 |
fdctrl->fifo[5] = 0; |
1434 |
/* timers */
|
1435 |
fdctrl->fifo[6] = fdctrl->timer0;
|
1436 |
fdctrl->fifo[7] = fdctrl->timer1;
|
1437 |
fdctrl->fifo[8] = cur_drv->last_sect;
|
1438 |
fdctrl->fifo[9] = (fdctrl->lock << 7) | |
1439 |
(cur_drv->perpendicular << 2);
|
1440 |
fdctrl->fifo[10] = fdctrl->config;
|
1441 |
fdctrl->fifo[11] = fdctrl->precomp_trk;
|
1442 |
fdctrl->fifo[12] = fdctrl->pwrd;
|
1443 |
fdctrl->fifo[13] = 0; |
1444 |
fdctrl->fifo[14] = 0; |
1445 |
fdctrl_set_fifo(fdctrl, 15, 1); |
1446 |
} |
1447 |
|
1448 |
static void fdctrl_handle_readid (fdctrl_t *fdctrl, int direction) |
1449 |
{ |
1450 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1451 |
|
1452 |
/* XXX: should set main status register to busy */
|
1453 |
cur_drv->head = (fdctrl->fifo[1] >> 2) & 1; |
1454 |
qemu_mod_timer(fdctrl->result_timer, |
1455 |
qemu_get_clock(vm_clock) + (ticks_per_sec / 50));
|
1456 |
} |
1457 |
|
1458 |
static void fdctrl_handle_format_track (fdctrl_t *fdctrl, int direction) |
1459 |
{ |
1460 |
fdrive_t *cur_drv; |
1461 |
|
1462 |
fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
|
1463 |
cur_drv = get_cur_drv(fdctrl); |
1464 |
fdctrl->data_state |= FD_STATE_FORMAT; |
1465 |
if (fdctrl->fifo[0] & 0x80) |
1466 |
fdctrl->data_state |= FD_STATE_MULTI; |
1467 |
else
|
1468 |
fdctrl->data_state &= ~FD_STATE_MULTI; |
1469 |
fdctrl->data_state &= ~FD_STATE_SEEK; |
1470 |
cur_drv->bps = |
1471 |
fdctrl->fifo[2] > 7 ? 16384 : 128 << fdctrl->fifo[2]; |
1472 |
#if 0
|
1473 |
cur_drv->last_sect =
|
1474 |
cur_drv->flags & FDISK_DBL_SIDES ? fdctrl->fifo[3] :
|
1475 |
fdctrl->fifo[3] / 2;
|
1476 |
#else
|
1477 |
cur_drv->last_sect = fdctrl->fifo[3];
|
1478 |
#endif
|
1479 |
/* TODO: implement format using DMA expected by the Bochs BIOS
|
1480 |
* and Linux fdformat (read 3 bytes per sector via DMA and fill
|
1481 |
* the sector with the specified fill byte
|
1482 |
*/
|
1483 |
fdctrl->data_state &= ~FD_STATE_FORMAT; |
1484 |
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); |
1485 |
} |
1486 |
|
1487 |
static void fdctrl_handle_specify (fdctrl_t *fdctrl, int direction) |
1488 |
{ |
1489 |
fdctrl->timer0 = (fdctrl->fifo[1] >> 4) & 0xF; |
1490 |
fdctrl->timer1 = fdctrl->fifo[2] >> 1; |
1491 |
fdctrl->dma_en = 1 - (fdctrl->fifo[2] & 1) ; |
1492 |
/* No result back */
|
1493 |
fdctrl_reset_fifo(fdctrl); |
1494 |
} |
1495 |
|
1496 |
static void fdctrl_handle_sense_drive_status (fdctrl_t *fdctrl, int direction) |
1497 |
{ |
1498 |
fdrive_t *cur_drv; |
1499 |
|
1500 |
fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
|
1501 |
cur_drv = get_cur_drv(fdctrl); |
1502 |
cur_drv->head = (fdctrl->fifo[1] >> 2) & 1; |
1503 |
/* 1 Byte status back */
|
1504 |
fdctrl->fifo[0] = (cur_drv->ro << 6) | |
1505 |
(cur_drv->track == 0 ? 0x10 : 0x00) | |
1506 |
(cur_drv->head << 2) |
|
1507 |
fdctrl->cur_drv | |
1508 |
0x28;
|
1509 |
fdctrl_set_fifo(fdctrl, 1, 0); |
1510 |
} |
1511 |
|
1512 |
static void fdctrl_handle_recalibrate (fdctrl_t *fdctrl, int direction) |
1513 |
{ |
1514 |
fdrive_t *cur_drv; |
1515 |
|
1516 |
fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
|
1517 |
cur_drv = get_cur_drv(fdctrl); |
1518 |
fd_recalibrate(cur_drv); |
1519 |
fdctrl_reset_fifo(fdctrl); |
1520 |
/* Raise Interrupt */
|
1521 |
fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); |
1522 |
} |
1523 |
|
1524 |
static void fdctrl_handle_sense_interrupt_status (fdctrl_t *fdctrl, int direction) |
1525 |
{ |
1526 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1527 |
|
1528 |
#if 0
|
1529 |
fdctrl->fifo[0] =
|
1530 |
fdctrl->int_status | (cur_drv->head << 2) | fdctrl->cur_drv;
|
1531 |
#else
|
1532 |
/* XXX: int_status handling is broken for read/write
|
1533 |
commands, so we do this hack. It should be suppressed
|
1534 |
ASAP */
|
1535 |
fdctrl->fifo[0] =
|
1536 |
0x20 | (cur_drv->head << 2) | fdctrl->cur_drv; |
1537 |
#endif
|
1538 |
fdctrl->fifo[1] = cur_drv->track;
|
1539 |
fdctrl_set_fifo(fdctrl, 2, 0); |
1540 |
fdctrl_reset_irq(fdctrl); |
1541 |
fdctrl->int_status = FD_SR0_RDYCHG; |
1542 |
} |
1543 |
|
1544 |
static void fdctrl_handle_seek (fdctrl_t *fdctrl, int direction) |
1545 |
{ |
1546 |
fdrive_t *cur_drv; |
1547 |
|
1548 |
fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
|
1549 |
cur_drv = get_cur_drv(fdctrl); |
1550 |
fd_start(cur_drv); |
1551 |
if (fdctrl->fifo[2] <= cur_drv->track) |
1552 |
cur_drv->dir = 1;
|
1553 |
else
|
1554 |
cur_drv->dir = 0;
|
1555 |
fdctrl_reset_fifo(fdctrl); |
1556 |
if (fdctrl->fifo[2] > cur_drv->max_track) { |
1557 |
fdctrl_raise_irq(fdctrl, FD_SR0_ABNTERM | FD_SR0_SEEK); |
1558 |
} else {
|
1559 |
cur_drv->track = fdctrl->fifo[2];
|
1560 |
/* Raise Interrupt */
|
1561 |
fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); |
1562 |
} |
1563 |
} |
1564 |
|
1565 |
static void fdctrl_handle_perpendicular_mode (fdctrl_t *fdctrl, int direction) |
1566 |
{ |
1567 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1568 |
|
1569 |
if (fdctrl->fifo[1] & 0x80) |
1570 |
cur_drv->perpendicular = fdctrl->fifo[1] & 0x7; |
1571 |
/* No result back */
|
1572 |
fdctrl_reset_fifo(fdctrl); |
1573 |
} |
1574 |
|
1575 |
static void fdctrl_handle_configure (fdctrl_t *fdctrl, int direction) |
1576 |
{ |
1577 |
fdctrl->config = fdctrl->fifo[2];
|
1578 |
fdctrl->precomp_trk = fdctrl->fifo[3];
|
1579 |
/* No result back */
|
1580 |
fdctrl_reset_fifo(fdctrl); |
1581 |
} |
1582 |
|
1583 |
static void fdctrl_handle_powerdown_mode (fdctrl_t *fdctrl, int direction) |
1584 |
{ |
1585 |
fdctrl->pwrd = fdctrl->fifo[1];
|
1586 |
fdctrl->fifo[0] = fdctrl->fifo[1]; |
1587 |
fdctrl_set_fifo(fdctrl, 1, 1); |
1588 |
} |
1589 |
|
1590 |
static void fdctrl_handle_option (fdctrl_t *fdctrl, int direction) |
1591 |
{ |
1592 |
/* No result back */
|
1593 |
fdctrl_reset_fifo(fdctrl); |
1594 |
} |
1595 |
|
1596 |
static void fdctrl_handle_drive_specification_command (fdctrl_t *fdctrl, int direction) |
1597 |
{ |
1598 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1599 |
|
1600 |
if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x80) { |
1601 |
/* Command parameters done */
|
1602 |
if (fdctrl->fifo[fdctrl->data_pos - 1] & 0x40) { |
1603 |
fdctrl->fifo[0] = fdctrl->fifo[1]; |
1604 |
fdctrl->fifo[2] = 0; |
1605 |
fdctrl->fifo[3] = 0; |
1606 |
fdctrl_set_fifo(fdctrl, 4, 1); |
1607 |
} else {
|
1608 |
fdctrl_reset_fifo(fdctrl); |
1609 |
} |
1610 |
} else if (fdctrl->data_len > 7) { |
1611 |
/* ERROR */
|
1612 |
fdctrl->fifo[0] = 0x80 | |
1613 |
(cur_drv->head << 2) | fdctrl->cur_drv;
|
1614 |
fdctrl_set_fifo(fdctrl, 1, 1); |
1615 |
} |
1616 |
} |
1617 |
|
1618 |
static void fdctrl_handle_relative_seek_out (fdctrl_t *fdctrl, int direction) |
1619 |
{ |
1620 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1621 |
|
1622 |
fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
|
1623 |
cur_drv = get_cur_drv(fdctrl); |
1624 |
fd_start(cur_drv); |
1625 |
cur_drv->dir = 0;
|
1626 |
if (fdctrl->fifo[2] + cur_drv->track >= cur_drv->max_track) { |
1627 |
cur_drv->track = cur_drv->max_track - 1;
|
1628 |
} else {
|
1629 |
cur_drv->track += fdctrl->fifo[2];
|
1630 |
} |
1631 |
fdctrl_reset_fifo(fdctrl); |
1632 |
fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); |
1633 |
} |
1634 |
|
1635 |
static void fdctrl_handle_relative_seek_in (fdctrl_t *fdctrl, int direction) |
1636 |
{ |
1637 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1638 |
|
1639 |
fdctrl->cur_drv = fdctrl->fifo[1] & FD_DOR_SELMASK;
|
1640 |
cur_drv = get_cur_drv(fdctrl); |
1641 |
fd_start(cur_drv); |
1642 |
cur_drv->dir = 1;
|
1643 |
if (fdctrl->fifo[2] > cur_drv->track) { |
1644 |
cur_drv->track = 0;
|
1645 |
} else {
|
1646 |
cur_drv->track -= fdctrl->fifo[2];
|
1647 |
} |
1648 |
fdctrl_reset_fifo(fdctrl); |
1649 |
/* Raise Interrupt */
|
1650 |
fdctrl_raise_irq(fdctrl, FD_SR0_SEEK); |
1651 |
} |
1652 |
|
1653 |
static const struct { |
1654 |
uint8_t value; |
1655 |
uint8_t mask; |
1656 |
const char* name; |
1657 |
int parameters;
|
1658 |
void (*handler)(fdctrl_t *fdctrl, int direction); |
1659 |
int direction;
|
1660 |
} handlers[] = { |
1661 |
{ FD_CMD_READ, 0x1f, "READ", 8, fdctrl_start_transfer, FD_DIR_READ }, |
1662 |
{ FD_CMD_WRITE, 0x3f, "WRITE", 8, fdctrl_start_transfer, FD_DIR_WRITE }, |
1663 |
{ FD_CMD_SEEK, 0xff, "SEEK", 2, fdctrl_handle_seek }, |
1664 |
{ FD_CMD_SENSE_INTERRUPT_STATUS, 0xff, "SENSE INTERRUPT STATUS", 0, fdctrl_handle_sense_interrupt_status }, |
1665 |
{ FD_CMD_RECALIBRATE, 0xff, "RECALIBRATE", 1, fdctrl_handle_recalibrate }, |
1666 |
{ FD_CMD_FORMAT_TRACK, 0xbf, "FORMAT TRACK", 5, fdctrl_handle_format_track }, |
1667 |
{ FD_CMD_READ_TRACK, 0xbf, "READ TRACK", 8, fdctrl_start_transfer, FD_DIR_READ }, |
1668 |
{ FD_CMD_RESTORE, 0xff, "RESTORE", 17, fdctrl_handle_restore }, /* part of READ DELETED DATA */ |
1669 |
{ FD_CMD_SAVE, 0xff, "SAVE", 0, fdctrl_handle_save }, /* part of READ DELETED DATA */ |
1670 |
{ FD_CMD_READ_DELETED, 0x1f, "READ DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_READ }, |
1671 |
{ FD_CMD_SCAN_EQUAL, 0x1f, "SCAN EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANE }, |
1672 |
{ FD_CMD_VERIFY, 0x1f, "VERIFY", 8, fdctrl_unimplemented }, |
1673 |
{ FD_CMD_SCAN_LOW_OR_EQUAL, 0x1f, "SCAN LOW OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANL }, |
1674 |
{ FD_CMD_SCAN_HIGH_OR_EQUAL, 0x1f, "SCAN HIGH OR EQUAL", 8, fdctrl_start_transfer, FD_DIR_SCANH }, |
1675 |
{ FD_CMD_WRITE_DELETED, 0x3f, "WRITE DELETED DATA", 8, fdctrl_start_transfer_del, FD_DIR_WRITE }, |
1676 |
{ FD_CMD_READ_ID, 0xbf, "READ ID", 1, fdctrl_handle_readid }, |
1677 |
{ FD_CMD_SPECIFY, 0xff, "SPECIFY", 2, fdctrl_handle_specify }, |
1678 |
{ FD_CMD_SENSE_DRIVE_STATUS, 0xff, "SENSE DRIVE STATUS", 1, fdctrl_handle_sense_drive_status }, |
1679 |
{ FD_CMD_PERPENDICULAR_MODE, 0xff, "PERPENDICULAR MODE", 1, fdctrl_handle_perpendicular_mode }, |
1680 |
{ FD_CMD_CONFIGURE, 0xff, "CONFIGURE", 3, fdctrl_handle_configure }, |
1681 |
{ FD_CMD_POWERDOWN_MODE, 0xff, "POWERDOWN MODE", 2, fdctrl_handle_powerdown_mode }, |
1682 |
{ FD_CMD_OPTION, 0xff, "OPTION", 1, fdctrl_handle_option }, |
1683 |
{ FD_CMD_DRIVE_SPECIFICATION_COMMAND, 0xff, "DRIVE SPECIFICATION COMMAND", 5, fdctrl_handle_drive_specification_command }, |
1684 |
{ FD_CMD_RELATIVE_SEEK_OUT, 0xff, "RELATIVE SEEK OUT", 2, fdctrl_handle_relative_seek_out }, |
1685 |
{ FD_CMD_FORMAT_AND_WRITE, 0xff, "FORMAT AND WRITE", 10, fdctrl_unimplemented }, |
1686 |
{ FD_CMD_RELATIVE_SEEK_IN, 0xff, "RELATIVE SEEK IN", 2, fdctrl_handle_relative_seek_in }, |
1687 |
{ FD_CMD_LOCK, 0x7f, "LOCK", 0, fdctrl_handle_lock }, |
1688 |
{ FD_CMD_DUMPREG, 0xff, "DUMPREG", 0, fdctrl_handle_dumpreg }, |
1689 |
{ FD_CMD_VERSION, 0xff, "VERSION", 0, fdctrl_handle_version }, |
1690 |
{ FD_CMD_PART_ID, 0xff, "PART ID", 0, fdctrl_handle_partid }, |
1691 |
{ FD_CMD_WRITE, 0x1f, "WRITE (BeOS)", 8, fdctrl_start_transfer, FD_DIR_WRITE }, /* not in specification ; BeOS 4.5 bug */ |
1692 |
{ 0, 0, "unknown", 0, fdctrl_unimplemented }, /* default handler */ |
1693 |
}; |
1694 |
/* Associate command to an index in the 'handlers' array */
|
1695 |
static uint8_t command_to_handler[256]; |
1696 |
|
1697 |
static void fdctrl_write_data (fdctrl_t *fdctrl, uint32_t value) |
1698 |
{ |
1699 |
fdrive_t *cur_drv; |
1700 |
int pos;
|
1701 |
|
1702 |
cur_drv = get_cur_drv(fdctrl); |
1703 |
/* Reset mode */
|
1704 |
if (fdctrl->state & FD_CTRL_RESET) {
|
1705 |
FLOPPY_DPRINTF("Floppy controller in RESET state !\n");
|
1706 |
return;
|
1707 |
} |
1708 |
fdctrl->state &= ~FD_CTRL_SLEEP; |
1709 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_STATUS) {
|
1710 |
FLOPPY_ERROR("can't write data in status mode\n");
|
1711 |
return;
|
1712 |
} |
1713 |
/* Is it write command time ? */
|
1714 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA) {
|
1715 |
/* FIFO data write */
|
1716 |
fdctrl->fifo[fdctrl->data_pos++] = value; |
1717 |
if (fdctrl->data_pos % FD_SECTOR_LEN == (FD_SECTOR_LEN - 1) || |
1718 |
fdctrl->data_pos == fdctrl->data_len) { |
1719 |
bdrv_write(cur_drv->bs, fd_sector(cur_drv), fdctrl->fifo, 1);
|
1720 |
if (!fdctrl_seek_to_next_sect(fdctrl, cur_drv)) {
|
1721 |
FLOPPY_DPRINTF("error seeking to next sector %d\n",
|
1722 |
fd_sector(cur_drv)); |
1723 |
return;
|
1724 |
} |
1725 |
} |
1726 |
/* Switch from transfer mode to status mode
|
1727 |
* then from status mode to command mode
|
1728 |
*/
|
1729 |
if (FD_STATE(fdctrl->data_state) == FD_STATE_DATA)
|
1730 |
fdctrl_stop_transfer(fdctrl, FD_SR0_SEEK, 0x00, 0x00); |
1731 |
return;
|
1732 |
} |
1733 |
if (fdctrl->data_pos == 0) { |
1734 |
/* Command */
|
1735 |
pos = command_to_handler[value & 0xff];
|
1736 |
FLOPPY_DPRINTF("%s command\n", handlers[pos].name);
|
1737 |
fdctrl->data_len = handlers[pos].parameters + 1;
|
1738 |
} |
1739 |
|
1740 |
FLOPPY_DPRINTF("%s: %02x\n", __func__, value);
|
1741 |
fdctrl->fifo[fdctrl->data_pos] = value; |
1742 |
if (++fdctrl->data_pos == fdctrl->data_len) {
|
1743 |
/* We now have all parameters
|
1744 |
* and will be able to treat the command
|
1745 |
*/
|
1746 |
if (fdctrl->data_state & FD_STATE_FORMAT) {
|
1747 |
fdctrl_format_sector(fdctrl); |
1748 |
return;
|
1749 |
} |
1750 |
|
1751 |
pos = command_to_handler[fdctrl->fifo[0] & 0xff]; |
1752 |
FLOPPY_DPRINTF("treat %s command\n", handlers[pos].name);
|
1753 |
(*handlers[pos].handler)(fdctrl, handlers[pos].direction); |
1754 |
} |
1755 |
} |
1756 |
|
1757 |
static void fdctrl_result_timer(void *opaque) |
1758 |
{ |
1759 |
fdctrl_t *fdctrl = opaque; |
1760 |
fdrive_t *cur_drv = get_cur_drv(fdctrl); |
1761 |
|
1762 |
/* Pretend we are spinning.
|
1763 |
* This is needed for Coherent, which uses READ ID to check for
|
1764 |
* sector interleaving.
|
1765 |
*/
|
1766 |
if (cur_drv->last_sect != 0) { |
1767 |
cur_drv->sect = (cur_drv->sect % cur_drv->last_sect) + 1;
|
1768 |
} |
1769 |
fdctrl_stop_transfer(fdctrl, 0x00, 0x00, 0x00); |
1770 |
} |
1771 |
|
1772 |
/* Init functions */
|
1773 |
static fdctrl_t *fdctrl_init_common (qemu_irq irq, int dma_chann, |
1774 |
target_phys_addr_t io_base, |
1775 |
BlockDriverState **fds) |
1776 |
{ |
1777 |
fdctrl_t *fdctrl; |
1778 |
int i, j;
|
1779 |
|
1780 |
/* Fill 'command_to_handler' lookup table */
|
1781 |
for (i = sizeof(handlers)/sizeof(handlers[0]) - 1; i >= 0; i--) { |
1782 |
for (j = 0; j < sizeof(command_to_handler); j++) { |
1783 |
if ((j & handlers[i].mask) == handlers[i].value)
|
1784 |
command_to_handler[j] = i; |
1785 |
} |
1786 |
} |
1787 |
|
1788 |
FLOPPY_DPRINTF("init controller\n");
|
1789 |
fdctrl = qemu_mallocz(sizeof(fdctrl_t));
|
1790 |
if (!fdctrl)
|
1791 |
return NULL; |
1792 |
fdctrl->fifo = qemu_memalign(512, FD_SECTOR_LEN);
|
1793 |
if (fdctrl->fifo == NULL) { |
1794 |
qemu_free(fdctrl); |
1795 |
return NULL; |
1796 |
} |
1797 |
fdctrl->result_timer = qemu_new_timer(vm_clock, |
1798 |
fdctrl_result_timer, fdctrl); |
1799 |
|
1800 |
fdctrl->version = 0x90; /* Intel 82078 controller */ |
1801 |
fdctrl->irq = irq; |
1802 |
fdctrl->dma_chann = dma_chann; |
1803 |
fdctrl->io_base = io_base; |
1804 |
fdctrl->config = FD_CONFIG_EIS | FD_CONFIG_EFIFO; /* Implicit seek, polling & FIFO enabled */
|
1805 |
if (fdctrl->dma_chann != -1) { |
1806 |
fdctrl->dma_en = 1;
|
1807 |
DMA_register_channel(dma_chann, &fdctrl_transfer_handler, fdctrl); |
1808 |
} else {
|
1809 |
fdctrl->dma_en = 0;
|
1810 |
} |
1811 |
for (i = 0; i < MAX_FD; i++) { |
1812 |
fd_init(&fdctrl->drives[i], fds[i]); |
1813 |
} |
1814 |
fdctrl_reset(fdctrl, 0);
|
1815 |
fdctrl->state = FD_CTRL_ACTIVE; |
1816 |
register_savevm("fdc", io_base, 1, fdc_save, fdc_load, fdctrl); |
1817 |
qemu_register_reset(fdctrl_external_reset, fdctrl); |
1818 |
for (i = 0; i < MAX_FD; i++) { |
1819 |
fd_revalidate(&fdctrl->drives[i]); |
1820 |
} |
1821 |
|
1822 |
return fdctrl;
|
1823 |
} |
1824 |
|
1825 |
fdctrl_t *fdctrl_init (qemu_irq irq, int dma_chann, int mem_mapped, |
1826 |
target_phys_addr_t io_base, |
1827 |
BlockDriverState **fds) |
1828 |
{ |
1829 |
fdctrl_t *fdctrl; |
1830 |
int io_mem;
|
1831 |
|
1832 |
fdctrl = fdctrl_init_common(irq, dma_chann, io_base, fds); |
1833 |
|
1834 |
fdctrl->sun4m = 0;
|
1835 |
if (mem_mapped) {
|
1836 |
io_mem = cpu_register_io_memory(0, fdctrl_mem_read, fdctrl_mem_write,
|
1837 |
fdctrl); |
1838 |
cpu_register_physical_memory(io_base, 0x08, io_mem);
|
1839 |
} else {
|
1840 |
register_ioport_read((uint32_t)io_base + 0x01, 5, 1, &fdctrl_read, |
1841 |
fdctrl); |
1842 |
register_ioport_read((uint32_t)io_base + 0x07, 1, 1, &fdctrl_read, |
1843 |
fdctrl); |
1844 |
register_ioport_write((uint32_t)io_base + 0x01, 5, 1, &fdctrl_write, |
1845 |
fdctrl); |
1846 |
register_ioport_write((uint32_t)io_base + 0x07, 1, 1, &fdctrl_write, |
1847 |
fdctrl); |
1848 |
} |
1849 |
|
1850 |
return fdctrl;
|
1851 |
} |
1852 |
|
1853 |
fdctrl_t *sun4m_fdctrl_init (qemu_irq irq, target_phys_addr_t io_base, |
1854 |
BlockDriverState **fds, qemu_irq *fdc_tc) |
1855 |
{ |
1856 |
fdctrl_t *fdctrl; |
1857 |
int io_mem;
|
1858 |
|
1859 |
fdctrl = fdctrl_init_common(irq, 0, io_base, fds);
|
1860 |
fdctrl->sun4m = 1;
|
1861 |
io_mem = cpu_register_io_memory(0, fdctrl_mem_read_strict,
|
1862 |
fdctrl_mem_write_strict, |
1863 |
fdctrl); |
1864 |
cpu_register_physical_memory(io_base, 0x08, io_mem);
|
1865 |
*fdc_tc = *qemu_allocate_irqs(fdctrl_handle_tc, fdctrl, 1);
|
1866 |
|
1867 |
return fdctrl;
|
1868 |
} |