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hw/m68k: add a dummy SWIM floppy controller

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SWIM (Sander-Wozniak Integrated Machine) is the floppy controller of
the 680x0 Macintosh.

This patch introduces only the basic support: it allows to switch from
IWM (Integrated WOZ Machine) mode to the SWIM mode and makes the linux
driver happy.

It cannot read any floppy image.

Co-developed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Hervé Poussineau <hpoussin@reactos.org>
Message-Id: <20191026164546.30020-10-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2019-10-26 18:45:44 +02:00
parent 8ac919a065
commit c701ec626c
6 changed files with 572 additions and 0 deletions
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76
include/hw/block/swim.h Normal file
View file

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/*
* QEMU Macintosh floppy disk controller emulator (SWIM)
*
* Copyright (c) 2014-2018 Laurent Vivier <laurent@vivier.eu>
*
* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
*/
#ifndef SWIM_H
#define SWIM_H
#include "qemu/osdep.h"
#include "hw/sysbus.h"
#define SWIM_MAX_FD 2
typedef struct SWIMDrive SWIMDrive;
typedef struct SWIMBus SWIMBus;
typedef struct SWIMCtrl SWIMCtrl;
#define TYPE_SWIM_DRIVE "swim-drive"
#define SWIM_DRIVE(obj) OBJECT_CHECK(SWIMDrive, (obj), TYPE_SWIM_DRIVE)
struct SWIMDrive {
DeviceState qdev;
int32_t unit;
BlockConf conf;
};
#define TYPE_SWIM_BUS "swim-bus"
#define SWIM_BUS(obj) OBJECT_CHECK(SWIMBus, (obj), TYPE_SWIM_BUS)
struct SWIMBus {
BusState bus;
struct SWIMCtrl *ctrl;
};
typedef struct FDrive {
SWIMCtrl *swimctrl;
BlockBackend *blk;
BlockConf *conf;
} FDrive;
struct SWIMCtrl {
MemoryRegion iomem;
FDrive drives[SWIM_MAX_FD];
int mode;
/* IWM mode */
int iwm_switch;
uint16_t regs[8];
#define IWM_PH0 0
#define IWM_PH1 1
#define IWM_PH2 2
#define IWM_PH3 3
#define IWM_MTR 4
#define IWM_DRIVE 5
#define IWM_Q6 6
#define IWM_Q7 7
uint8_t iwm_data;
uint8_t iwm_mode;
/* SWIM mode */
uint8_t swim_phase;
uint8_t swim_mode;
SWIMBus bus;
};
#define TYPE_SWIM "swim"
#define SWIM(obj) OBJECT_CHECK(SWIM, (obj), TYPE_SWIM)
typedef struct SWIM {
SysBusDevice parent_obj;
SWIMCtrl ctrl;
} SWIM;
#endif