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hw/m68k: add VIA support

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Inside the 680x0 Macintosh, VIA (Versatile Interface Adapter) is used
to interface the keyboard, Mouse, and real-time clock. It also provides
control line for the floppy disk driver, video interface, sound circuitry
and serial interface.

This implementation is based on the MOS6522 object.

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: <20191026164546.30020-6-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier 2019-10-26 18:45:40 +02:00
parent be92084198
commit 6dca62a000
7 changed files with 891 additions and 0 deletions
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108
include/hw/misc/mac_via.h Normal file
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/*
*
* Copyright (c) 2011-2018 Laurent Vivier
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef HW_MISC_MAC_VIA_H
#define HW_MISC_MAC_VIA_H
#include "exec/memory.h"
#include "hw/sysbus.h"
#include "hw/misc/mos6522.h"
/* VIA 1 */
#define VIA1_IRQ_ONE_SECOND_BIT 0
#define VIA1_IRQ_VBLANK_BIT 1
#define VIA1_IRQ_ADB_READY_BIT 2
#define VIA1_IRQ_ADB_DATA_BIT 3
#define VIA1_IRQ_ADB_CLOCK_BIT 4
#define VIA1_IRQ_NB 8
#define VIA1_IRQ_ONE_SECOND (1 << VIA1_IRQ_ONE_SECOND_BIT)
#define VIA1_IRQ_VBLANK (1 << VIA1_IRQ_VBLANK_BIT)
#define VIA1_IRQ_ADB_READY (1 << VIA1_IRQ_ADB_READY_BIT)
#define VIA1_IRQ_ADB_DATA (1 << VIA1_IRQ_ADB_DATA_BIT)
#define VIA1_IRQ_ADB_CLOCK (1 << VIA1_IRQ_ADB_CLOCK_BIT)
#define TYPE_MOS6522_Q800_VIA1 "mos6522-q800-via1"
#define MOS6522_Q800_VIA1(obj) OBJECT_CHECK(MOS6522Q800VIA1State, (obj), \
TYPE_MOS6522_Q800_VIA1)
typedef struct MOS6522Q800VIA1State {
/*< private >*/
MOS6522State parent_obj;
qemu_irq irqs[VIA1_IRQ_NB];
uint8_t last_b;
uint8_t PRAM[256];
/* external timers */
QEMUTimer *one_second_timer;
int64_t next_second;
QEMUTimer *VBL_timer;
int64_t next_VBL;
} MOS6522Q800VIA1State;
/* VIA 2 */
#define VIA2_IRQ_SCSI_DATA_BIT 0
#define VIA2_IRQ_SLOT_BIT 1
#define VIA2_IRQ_UNUSED_BIT 2
#define VIA2_IRQ_SCSI_BIT 3
#define VIA2_IRQ_ASC_BIT 4
#define VIA2_IRQ_NB 8
#define VIA2_IRQ_SCSI_DATA (1 << VIA2_IRQ_SCSI_DATA_BIT)
#define VIA2_IRQ_SLOT (1 << VIA2_IRQ_SLOT_BIT)
#define VIA2_IRQ_UNUSED (1 << VIA2_IRQ_SCSI_BIT)
#define VIA2_IRQ_SCSI (1 << VIA2_IRQ_UNUSED_BIT)
#define VIA2_IRQ_ASC (1 << VIA2_IRQ_ASC_BIT)
#define TYPE_MOS6522_Q800_VIA2 "mos6522-q800-via2"
#define MOS6522_Q800_VIA2(obj) OBJECT_CHECK(MOS6522Q800VIA2State, (obj), \
TYPE_MOS6522_Q800_VIA2)
typedef struct MOS6522Q800VIA2State {
/*< private >*/
MOS6522State parent_obj;
} MOS6522Q800VIA2State;
#define TYPE_MAC_VIA "mac_via"
#define MAC_VIA(obj) OBJECT_CHECK(MacVIAState, (obj), TYPE_MAC_VIA)
typedef struct MacVIAState {
SysBusDevice busdev;
/* MMIO */
MemoryRegion mmio;
MemoryRegion via1mem;
MemoryRegion via2mem;
/* VIAs */
MOS6522Q800VIA1State mos6522_via1;
MOS6522Q800VIA2State mos6522_via2;
/* RTC */
uint32_t tick_offset;
uint8_t data_out;
int data_out_cnt;
uint8_t data_in;
uint8_t data_in_cnt;
uint8_t cmd;
int wprotect;
int alt;
/* ADB */
ADBBusState adb_bus;
} MacVIAState;
#endif