975fcedd31
The existing ADB state machine is designed to work with Linux which has a different interpretation of the state machine detailed in "Guide to the Macintosh Family Hardware". In particular the current Linux implementation includes an extra change to IDLE state when switching the VIA between send and receive modes which does not occur in MacOS, and omitting this transition causes the current mac_via ADB state machine to fail. Rework the ADB state machine accordingly so that it can enumerate and autopoll the ADB under both Linux and MacOS, including the addition of the new adb_autopoll_block() and adb_autopoll_unblock() functions. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Tested-by: Finn Thain <fthain@telegraphics.com.au> Acked-by: Laurent Vivier <laurent@vivier.eu> Message-Id: <20200623204936.24064-20-mark.cave-ayland@ilande.co.uk>
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/*
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*
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* Copyright (c) 2011-2018 Laurent Vivier
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef HW_MISC_MAC_VIA_H
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#define HW_MISC_MAC_VIA_H
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#include "exec/memory.h"
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#include "hw/sysbus.h"
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#include "hw/misc/mos6522.h"
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/* VIA 1 */
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#define VIA1_IRQ_ONE_SECOND_BIT 0
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#define VIA1_IRQ_VBLANK_BIT 1
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#define VIA1_IRQ_ADB_READY_BIT 2
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#define VIA1_IRQ_ADB_DATA_BIT 3
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#define VIA1_IRQ_ADB_CLOCK_BIT 4
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#define VIA1_IRQ_NB 8
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#define VIA1_IRQ_ONE_SECOND (1 << VIA1_IRQ_ONE_SECOND_BIT)
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#define VIA1_IRQ_VBLANK (1 << VIA1_IRQ_VBLANK_BIT)
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#define VIA1_IRQ_ADB_READY (1 << VIA1_IRQ_ADB_READY_BIT)
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#define VIA1_IRQ_ADB_DATA (1 << VIA1_IRQ_ADB_DATA_BIT)
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#define VIA1_IRQ_ADB_CLOCK (1 << VIA1_IRQ_ADB_CLOCK_BIT)
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#define TYPE_MOS6522_Q800_VIA1 "mos6522-q800-via1"
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#define MOS6522_Q800_VIA1(obj) OBJECT_CHECK(MOS6522Q800VIA1State, (obj), \
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TYPE_MOS6522_Q800_VIA1)
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typedef struct MOS6522Q800VIA1State {
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/*< private >*/
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MOS6522State parent_obj;
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qemu_irq irqs[VIA1_IRQ_NB];
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uint8_t last_b;
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uint8_t PRAM[256];
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/* external timers */
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QEMUTimer *one_second_timer;
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int64_t next_second;
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QEMUTimer *VBL_timer;
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int64_t next_VBL;
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} MOS6522Q800VIA1State;
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/* VIA 2 */
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#define VIA2_IRQ_SCSI_DATA_BIT 0
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#define VIA2_IRQ_SLOT_BIT 1
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#define VIA2_IRQ_UNUSED_BIT 2
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#define VIA2_IRQ_SCSI_BIT 3
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#define VIA2_IRQ_ASC_BIT 4
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#define VIA2_IRQ_NB 8
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#define VIA2_IRQ_SCSI_DATA (1 << VIA2_IRQ_SCSI_DATA_BIT)
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#define VIA2_IRQ_SLOT (1 << VIA2_IRQ_SLOT_BIT)
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#define VIA2_IRQ_UNUSED (1 << VIA2_IRQ_SCSI_BIT)
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#define VIA2_IRQ_SCSI (1 << VIA2_IRQ_UNUSED_BIT)
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#define VIA2_IRQ_ASC (1 << VIA2_IRQ_ASC_BIT)
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#define TYPE_MOS6522_Q800_VIA2 "mos6522-q800-via2"
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#define MOS6522_Q800_VIA2(obj) OBJECT_CHECK(MOS6522Q800VIA2State, (obj), \
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TYPE_MOS6522_Q800_VIA2)
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typedef struct MOS6522Q800VIA2State {
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/*< private >*/
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MOS6522State parent_obj;
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} MOS6522Q800VIA2State;
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#define TYPE_MAC_VIA "mac_via"
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#define MAC_VIA(obj) OBJECT_CHECK(MacVIAState, (obj), TYPE_MAC_VIA)
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typedef struct MacVIAState {
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SysBusDevice busdev;
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VMChangeStateEntry *vmstate;
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/* MMIO */
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MemoryRegion mmio;
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MemoryRegion via1mem;
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MemoryRegion via2mem;
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/* VIAs */
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MOS6522Q800VIA1State mos6522_via1;
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MOS6522Q800VIA2State mos6522_via2;
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/* RTC */
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uint32_t tick_offset;
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uint8_t data_out;
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int data_out_cnt;
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uint8_t data_in;
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uint8_t data_in_cnt;
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uint8_t cmd;
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int wprotect;
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int alt;
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BlockBackend *blk;
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/* ADB */
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ADBBusState adb_bus;
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qemu_irq adb_data_ready;
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int adb_data_in_size;
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int adb_data_in_index;
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int adb_data_out_index;
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uint8_t adb_data_in[128];
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uint8_t adb_data_out[16];
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uint8_t adb_autopoll_cmd;
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} MacVIAState;
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#endif
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