Merge tag 'pull-target-arm-20220922' of https://git.linaro.org/people/pmaydell/qemu...
[qemu.git] / hw / misc / allwinner-h3-sysctrl.c
1 /*
2 * Allwinner H3 System Control emulation
3 *
4 * Copyright (C) 2019 Niek Linnenbank <nieklinnenbank@gmail.com>
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qemu/units.h"
22 #include "hw/sysbus.h"
23 #include "migration/vmstate.h"
24 #include "qemu/log.h"
25 #include "qemu/module.h"
26 #include "hw/misc/allwinner-h3-sysctrl.h"
27
28 /* System Control register offsets */
29 enum {
30 REG_VER = 0x24, /* Version */
31 REG_EMAC_PHY_CLK = 0x30, /* EMAC PHY Clock */
32 };
33
34 #define REG_INDEX(offset) (offset / sizeof(uint32_t))
35
36 /* System Control register reset values */
37 enum {
38 REG_VER_RST = 0x0,
39 REG_EMAC_PHY_CLK_RST = 0x58000,
40 };
41
42 static uint64_t allwinner_h3_sysctrl_read(void *opaque, hwaddr offset,
43 unsigned size)
44 {
45 const AwH3SysCtrlState *s = AW_H3_SYSCTRL(opaque);
46 const uint32_t idx = REG_INDEX(offset);
47
48 if (idx >= AW_H3_SYSCTRL_REGS_NUM) {
49 qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
50 __func__, (uint32_t)offset);
51 return 0;
52 }
53
54 return s->regs[idx];
55 }
56
57 static void allwinner_h3_sysctrl_write(void *opaque, hwaddr offset,
58 uint64_t val, unsigned size)
59 {
60 AwH3SysCtrlState *s = AW_H3_SYSCTRL(opaque);
61 const uint32_t idx = REG_INDEX(offset);
62
63 if (idx >= AW_H3_SYSCTRL_REGS_NUM) {
64 qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
65 __func__, (uint32_t)offset);
66 return;
67 }
68
69 switch (offset) {
70 case REG_VER: /* Version */
71 break;
72 default:
73 s->regs[idx] = (uint32_t) val;
74 break;
75 }
76 }
77
78 static const MemoryRegionOps allwinner_h3_sysctrl_ops = {
79 .read = allwinner_h3_sysctrl_read,
80 .write = allwinner_h3_sysctrl_write,
81 .endianness = DEVICE_NATIVE_ENDIAN,
82 .valid = {
83 .min_access_size = 4,
84 .max_access_size = 4,
85 },
86 .impl.min_access_size = 4,
87 };
88
89 static void allwinner_h3_sysctrl_reset(DeviceState *dev)
90 {
91 AwH3SysCtrlState *s = AW_H3_SYSCTRL(dev);
92
93 /* Set default values for registers */
94 s->regs[REG_INDEX(REG_VER)] = REG_VER_RST;
95 s->regs[REG_INDEX(REG_EMAC_PHY_CLK)] = REG_EMAC_PHY_CLK_RST;
96 }
97
98 static void allwinner_h3_sysctrl_init(Object *obj)
99 {
100 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
101 AwH3SysCtrlState *s = AW_H3_SYSCTRL(obj);
102
103 /* Memory mapping */
104 memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_h3_sysctrl_ops, s,
105 TYPE_AW_H3_SYSCTRL, 4 * KiB);
106 sysbus_init_mmio(sbd, &s->iomem);
107 }
108
109 static const VMStateDescription allwinner_h3_sysctrl_vmstate = {
110 .name = "allwinner-h3-sysctrl",
111 .version_id = 1,
112 .minimum_version_id = 1,
113 .fields = (VMStateField[]) {
114 VMSTATE_UINT32_ARRAY(regs, AwH3SysCtrlState, AW_H3_SYSCTRL_REGS_NUM),
115 VMSTATE_END_OF_LIST()
116 }
117 };
118
119 static void allwinner_h3_sysctrl_class_init(ObjectClass *klass, void *data)
120 {
121 DeviceClass *dc = DEVICE_CLASS(klass);
122
123 dc->reset = allwinner_h3_sysctrl_reset;
124 dc->vmsd = &allwinner_h3_sysctrl_vmstate;
125 }
126
127 static const TypeInfo allwinner_h3_sysctrl_info = {
128 .name = TYPE_AW_H3_SYSCTRL,
129 .parent = TYPE_SYS_BUS_DEVICE,
130 .instance_init = allwinner_h3_sysctrl_init,
131 .instance_size = sizeof(AwH3SysCtrlState),
132 .class_init = allwinner_h3_sysctrl_class_init,
133 };
134
135 static void allwinner_h3_sysctrl_register(void)
136 {
137 type_register_static(&allwinner_h3_sysctrl_info);
138 }
139
140 type_init(allwinner_h3_sysctrl_register)