1*bdc2c77dSMark Cave-Ayland /*
2*bdc2c77dSMark Cave-Ayland * QEMU IOSB emulation
3*bdc2c77dSMark Cave-Ayland *
4*bdc2c77dSMark Cave-Ayland * Copyright (c) 2019 Laurent Vivier
5*bdc2c77dSMark Cave-Ayland * Copyright (c) 2022 Mark Cave-Ayland
6*bdc2c77dSMark Cave-Ayland *
7*bdc2c77dSMark Cave-Ayland * SPDX-License-Identifier: GPL-2.0-or-later
8*bdc2c77dSMark Cave-Ayland */
9*bdc2c77dSMark Cave-Ayland
10*bdc2c77dSMark Cave-Ayland #include "qemu/osdep.h"
11*bdc2c77dSMark Cave-Ayland #include "qemu/log.h"
12*bdc2c77dSMark Cave-Ayland #include "migration/vmstate.h"
13*bdc2c77dSMark Cave-Ayland #include "hw/sysbus.h"
14*bdc2c77dSMark Cave-Ayland #include "hw/misc/iosb.h"
15*bdc2c77dSMark Cave-Ayland #include "trace.h"
16*bdc2c77dSMark Cave-Ayland
17*bdc2c77dSMark Cave-Ayland #define IOSB_SIZE 0x2000
18*bdc2c77dSMark Cave-Ayland
19*bdc2c77dSMark Cave-Ayland #define IOSB_CONFIG 0x0
20*bdc2c77dSMark Cave-Ayland #define IOSB_CONFIG2 0x100
21*bdc2c77dSMark Cave-Ayland #define IOSB_SONIC_SCSI 0x200
22*bdc2c77dSMark Cave-Ayland #define IOSB_REVISION 0x300
23*bdc2c77dSMark Cave-Ayland #define IOSB_SCSI_RESID 0x400
24*bdc2c77dSMark Cave-Ayland #define IOSB_BRIGHTNESS 0x500
25*bdc2c77dSMark Cave-Ayland #define IOSB_TIMEOUT 0x600
26*bdc2c77dSMark Cave-Ayland
27*bdc2c77dSMark Cave-Ayland
iosb_read(void * opaque,hwaddr addr,unsigned size)28*bdc2c77dSMark Cave-Ayland static uint64_t iosb_read(void *opaque, hwaddr addr,
29*bdc2c77dSMark Cave-Ayland unsigned size)
30*bdc2c77dSMark Cave-Ayland {
31*bdc2c77dSMark Cave-Ayland IOSBState *s = IOSB(opaque);
32*bdc2c77dSMark Cave-Ayland uint64_t val = 0;
33*bdc2c77dSMark Cave-Ayland
34*bdc2c77dSMark Cave-Ayland switch (addr) {
35*bdc2c77dSMark Cave-Ayland case IOSB_CONFIG:
36*bdc2c77dSMark Cave-Ayland case IOSB_CONFIG2:
37*bdc2c77dSMark Cave-Ayland case IOSB_SONIC_SCSI:
38*bdc2c77dSMark Cave-Ayland case IOSB_REVISION:
39*bdc2c77dSMark Cave-Ayland case IOSB_SCSI_RESID:
40*bdc2c77dSMark Cave-Ayland case IOSB_BRIGHTNESS:
41*bdc2c77dSMark Cave-Ayland case IOSB_TIMEOUT:
42*bdc2c77dSMark Cave-Ayland val = s->regs[addr >> 8];
43*bdc2c77dSMark Cave-Ayland break;
44*bdc2c77dSMark Cave-Ayland default:
45*bdc2c77dSMark Cave-Ayland qemu_log_mask(LOG_UNIMP, "IOSB: unimplemented read addr=0x%"PRIx64
46*bdc2c77dSMark Cave-Ayland " val=0x%"PRIx64 " size=%d\n",
47*bdc2c77dSMark Cave-Ayland addr, val, size);
48*bdc2c77dSMark Cave-Ayland }
49*bdc2c77dSMark Cave-Ayland
50*bdc2c77dSMark Cave-Ayland trace_iosb_read(addr, val, size);
51*bdc2c77dSMark Cave-Ayland return val;
52*bdc2c77dSMark Cave-Ayland }
53*bdc2c77dSMark Cave-Ayland
iosb_write(void * opaque,hwaddr addr,uint64_t val,unsigned size)54*bdc2c77dSMark Cave-Ayland static void iosb_write(void *opaque, hwaddr addr, uint64_t val,
55*bdc2c77dSMark Cave-Ayland unsigned size)
56*bdc2c77dSMark Cave-Ayland {
57*bdc2c77dSMark Cave-Ayland IOSBState *s = IOSB(opaque);
58*bdc2c77dSMark Cave-Ayland
59*bdc2c77dSMark Cave-Ayland switch (addr) {
60*bdc2c77dSMark Cave-Ayland case IOSB_CONFIG:
61*bdc2c77dSMark Cave-Ayland case IOSB_CONFIG2:
62*bdc2c77dSMark Cave-Ayland case IOSB_SONIC_SCSI:
63*bdc2c77dSMark Cave-Ayland case IOSB_REVISION:
64*bdc2c77dSMark Cave-Ayland case IOSB_SCSI_RESID:
65*bdc2c77dSMark Cave-Ayland case IOSB_BRIGHTNESS:
66*bdc2c77dSMark Cave-Ayland case IOSB_TIMEOUT:
67*bdc2c77dSMark Cave-Ayland s->regs[addr >> 8] = val;
68*bdc2c77dSMark Cave-Ayland break;
69*bdc2c77dSMark Cave-Ayland default:
70*bdc2c77dSMark Cave-Ayland qemu_log_mask(LOG_UNIMP, "IOSB: unimplemented write addr=0x%"PRIx64
71*bdc2c77dSMark Cave-Ayland " val=0x%"PRIx64 " size=%d\n",
72*bdc2c77dSMark Cave-Ayland addr, val, size);
73*bdc2c77dSMark Cave-Ayland }
74*bdc2c77dSMark Cave-Ayland
75*bdc2c77dSMark Cave-Ayland trace_iosb_write(addr, val, size);
76*bdc2c77dSMark Cave-Ayland }
77*bdc2c77dSMark Cave-Ayland
78*bdc2c77dSMark Cave-Ayland static const MemoryRegionOps iosb_mmio_ops = {
79*bdc2c77dSMark Cave-Ayland .read = iosb_read,
80*bdc2c77dSMark Cave-Ayland .write = iosb_write,
81*bdc2c77dSMark Cave-Ayland .endianness = DEVICE_BIG_ENDIAN,
82*bdc2c77dSMark Cave-Ayland };
83*bdc2c77dSMark Cave-Ayland
iosb_reset_hold(Object * obj)84*bdc2c77dSMark Cave-Ayland static void iosb_reset_hold(Object *obj)
85*bdc2c77dSMark Cave-Ayland {
86*bdc2c77dSMark Cave-Ayland IOSBState *s = IOSB(obj);
87*bdc2c77dSMark Cave-Ayland
88*bdc2c77dSMark Cave-Ayland memset(s->regs, 0, sizeof(s->regs));
89*bdc2c77dSMark Cave-Ayland
90*bdc2c77dSMark Cave-Ayland /* BCLK 33 MHz */
91*bdc2c77dSMark Cave-Ayland s->regs[IOSB_CONFIG >> 8] = 1;
92*bdc2c77dSMark Cave-Ayland }
93*bdc2c77dSMark Cave-Ayland
iosb_init(Object * obj)94*bdc2c77dSMark Cave-Ayland static void iosb_init(Object *obj)
95*bdc2c77dSMark Cave-Ayland {
96*bdc2c77dSMark Cave-Ayland IOSBState *s = IOSB(obj);
97*bdc2c77dSMark Cave-Ayland SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
98*bdc2c77dSMark Cave-Ayland
99*bdc2c77dSMark Cave-Ayland memory_region_init_io(&s->mem_regs, obj, &iosb_mmio_ops, s, "IOSB",
100*bdc2c77dSMark Cave-Ayland IOSB_SIZE);
101*bdc2c77dSMark Cave-Ayland sysbus_init_mmio(sbd, &s->mem_regs);
102*bdc2c77dSMark Cave-Ayland }
103*bdc2c77dSMark Cave-Ayland
104*bdc2c77dSMark Cave-Ayland static const VMStateDescription vmstate_iosb = {
105*bdc2c77dSMark Cave-Ayland .name = "IOSB",
106*bdc2c77dSMark Cave-Ayland .version_id = 1,
107*bdc2c77dSMark Cave-Ayland .minimum_version_id = 1,
108*bdc2c77dSMark Cave-Ayland .fields = (VMStateField[]) {
109*bdc2c77dSMark Cave-Ayland VMSTATE_UINT32_ARRAY(regs, IOSBState, IOSB_REGS),
110*bdc2c77dSMark Cave-Ayland VMSTATE_END_OF_LIST()
111*bdc2c77dSMark Cave-Ayland }
112*bdc2c77dSMark Cave-Ayland };
113*bdc2c77dSMark Cave-Ayland
iosb_class_init(ObjectClass * oc,void * data)114*bdc2c77dSMark Cave-Ayland static void iosb_class_init(ObjectClass *oc, void *data)
115*bdc2c77dSMark Cave-Ayland {
116*bdc2c77dSMark Cave-Ayland DeviceClass *dc = DEVICE_CLASS(oc);
117*bdc2c77dSMark Cave-Ayland ResettableClass *rc = RESETTABLE_CLASS(oc);
118*bdc2c77dSMark Cave-Ayland
119*bdc2c77dSMark Cave-Ayland dc->vmsd = &vmstate_iosb;
120*bdc2c77dSMark Cave-Ayland rc->phases.hold = iosb_reset_hold;
121*bdc2c77dSMark Cave-Ayland }
122*bdc2c77dSMark Cave-Ayland
123*bdc2c77dSMark Cave-Ayland static const TypeInfo iosb_info_types[] = {
124*bdc2c77dSMark Cave-Ayland {
125*bdc2c77dSMark Cave-Ayland .name = TYPE_IOSB,
126*bdc2c77dSMark Cave-Ayland .parent = TYPE_SYS_BUS_DEVICE,
127*bdc2c77dSMark Cave-Ayland .instance_size = sizeof(IOSBState),
128*bdc2c77dSMark Cave-Ayland .instance_init = iosb_init,
129*bdc2c77dSMark Cave-Ayland .class_init = iosb_class_init,
130*bdc2c77dSMark Cave-Ayland },
131*bdc2c77dSMark Cave-Ayland };
132*bdc2c77dSMark Cave-Ayland
133*bdc2c77dSMark Cave-Ayland DEFINE_TYPES(iosb_info_types)
134