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1 | /* |
2 | * Allwinner R40 Clock Control Unit emulation | |
3 | * | |
4 | * Copyright (C) 2023 qianfan Zhao <qianfanguijin@163.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-r40-ccu.h" | |
27 | ||
28 | /* CCU register offsets */ | |
29 | enum { | |
30 | REG_PLL_CPUX_CTRL = 0x0000, | |
31 | REG_PLL_AUDIO_CTRL = 0x0008, | |
32 | REG_PLL_VIDEO0_CTRL = 0x0010, | |
33 | REG_PLL_VE_CTRL = 0x0018, | |
34 | REG_PLL_DDR0_CTRL = 0x0020, | |
35 | REG_PLL_PERIPH0_CTRL = 0x0028, | |
36 | REG_PLL_PERIPH1_CTRL = 0x002c, | |
37 | REG_PLL_VIDEO1_CTRL = 0x0030, | |
38 | REG_PLL_SATA_CTRL = 0x0034, | |
39 | REG_PLL_GPU_CTRL = 0x0038, | |
40 | REG_PLL_MIPI_CTRL = 0x0040, | |
41 | REG_PLL_DE_CTRL = 0x0048, | |
42 | REG_PLL_DDR1_CTRL = 0x004c, | |
43 | REG_AHB1_APB1_CFG = 0x0054, | |
44 | REG_APB2_CFG = 0x0058, | |
45 | REG_MMC0_CLK = 0x0088, | |
46 | REG_MMC1_CLK = 0x008c, | |
47 | REG_MMC2_CLK = 0x0090, | |
48 | REG_MMC3_CLK = 0x0094, | |
49 | REG_USBPHY_CFG = 0x00cc, | |
50 | REG_PLL_DDR_AUX = 0x00f0, | |
51 | REG_DRAM_CFG = 0x00f4, | |
52 | REG_PLL_DDR1_CFG = 0x00f8, | |
53 | REG_DRAM_CLK_GATING = 0x0100, | |
54 | REG_GMAC_CLK = 0x0164, | |
55 | REG_SYS_32K_CLK = 0x0310, | |
56 | REG_PLL_LOCK_CTRL = 0x0320, | |
57 | }; | |
58 | ||
59 | #define REG_INDEX(offset) (offset / sizeof(uint32_t)) | |
60 | ||
61 | /* CCU register flags */ | |
62 | enum { | |
63 | REG_PLL_ENABLE = (1 << 31), | |
64 | REG_PLL_LOCK = (1 << 28), | |
65 | }; | |
66 | ||
67 | static uint64_t allwinner_r40_ccu_read(void *opaque, hwaddr offset, | |
68 | unsigned size) | |
69 | { | |
70 | const AwR40ClockCtlState *s = AW_R40_CCU(opaque); | |
71 | const uint32_t idx = REG_INDEX(offset); | |
72 | ||
73 | switch (offset) { | |
74 | case 0x324 ... AW_R40_CCU_IOSIZE: | |
75 | qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n", | |
76 | __func__, (uint32_t)offset); | |
77 | return 0; | |
78 | } | |
79 | ||
80 | return s->regs[idx]; | |
81 | } | |
82 | ||
83 | static void allwinner_r40_ccu_write(void *opaque, hwaddr offset, | |
84 | uint64_t val, unsigned size) | |
85 | { | |
86 | AwR40ClockCtlState *s = AW_R40_CCU(opaque); | |
87 | ||
88 | switch (offset) { | |
89 | case REG_DRAM_CFG: /* DRAM Configuration(for DDR0) */ | |
90 | /* bit16: SDRCLK_UPD (SDRCLK configuration 0 update) */ | |
91 | val &= ~(1 << 16); | |
92 | break; | |
93 | case REG_PLL_DDR1_CTRL: /* DDR1 Control register */ | |
94 | /* bit30: SDRPLL_UPD */ | |
95 | val &= ~(1 << 30); | |
96 | if (val & REG_PLL_ENABLE) { | |
97 | val |= REG_PLL_LOCK; | |
98 | } | |
99 | break; | |
100 | case REG_PLL_CPUX_CTRL: | |
101 | case REG_PLL_AUDIO_CTRL: | |
102 | case REG_PLL_VE_CTRL: | |
103 | case REG_PLL_VIDEO0_CTRL: | |
104 | case REG_PLL_DDR0_CTRL: | |
105 | case REG_PLL_PERIPH0_CTRL: | |
106 | case REG_PLL_PERIPH1_CTRL: | |
107 | case REG_PLL_VIDEO1_CTRL: | |
108 | case REG_PLL_SATA_CTRL: | |
109 | case REG_PLL_GPU_CTRL: | |
110 | case REG_PLL_MIPI_CTRL: | |
111 | case REG_PLL_DE_CTRL: | |
112 | if (val & REG_PLL_ENABLE) { | |
113 | val |= REG_PLL_LOCK; | |
114 | } | |
115 | break; | |
116 | case 0x324 ... AW_R40_CCU_IOSIZE: | |
117 | qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n", | |
118 | __func__, (uint32_t)offset); | |
119 | break; | |
120 | default: | |
121 | qemu_log_mask(LOG_UNIMP, "%s: unimplemented write offset 0x%04x\n", | |
122 | __func__, (uint32_t)offset); | |
123 | break; | |
124 | } | |
125 | ||
126 | s->regs[REG_INDEX(offset)] = (uint32_t) val; | |
127 | } | |
128 | ||
129 | static const MemoryRegionOps allwinner_r40_ccu_ops = { | |
130 | .read = allwinner_r40_ccu_read, | |
131 | .write = allwinner_r40_ccu_write, | |
132 | .endianness = DEVICE_NATIVE_ENDIAN, | |
133 | .valid = { | |
134 | .min_access_size = 4, | |
135 | .max_access_size = 4, | |
136 | }, | |
137 | .impl.min_access_size = 4, | |
138 | }; | |
139 | ||
140 | static void allwinner_r40_ccu_reset(DeviceState *dev) | |
141 | { | |
142 | AwR40ClockCtlState *s = AW_R40_CCU(dev); | |
143 | ||
144 | memset(s->regs, 0, sizeof(s->regs)); | |
145 | ||
146 | /* Set default values for registers */ | |
147 | s->regs[REG_INDEX(REG_PLL_CPUX_CTRL)] = 0x00001000; | |
148 | s->regs[REG_INDEX(REG_PLL_AUDIO_CTRL)] = 0x00035514; | |
149 | s->regs[REG_INDEX(REG_PLL_VIDEO0_CTRL)] = 0x03006207; | |
150 | s->regs[REG_INDEX(REG_PLL_VE_CTRL)] = 0x03006207; | |
151 | s->regs[REG_INDEX(REG_PLL_DDR0_CTRL)] = 0x00001000, | |
152 | s->regs[REG_INDEX(REG_PLL_PERIPH0_CTRL)] = 0x00041811; | |
153 | s->regs[REG_INDEX(REG_PLL_PERIPH1_CTRL)] = 0x00041811; | |
154 | s->regs[REG_INDEX(REG_PLL_VIDEO1_CTRL)] = 0x03006207; | |
155 | s->regs[REG_INDEX(REG_PLL_SATA_CTRL)] = 0x00001811; | |
156 | s->regs[REG_INDEX(REG_PLL_GPU_CTRL)] = 0x03006207; | |
157 | s->regs[REG_INDEX(REG_PLL_MIPI_CTRL)] = 0x00000515; | |
158 | s->regs[REG_INDEX(REG_PLL_DE_CTRL)] = 0x03006207; | |
159 | s->regs[REG_INDEX(REG_PLL_DDR1_CTRL)] = 0x00001800; | |
160 | s->regs[REG_INDEX(REG_AHB1_APB1_CFG)] = 0x00001010; | |
161 | s->regs[REG_INDEX(REG_APB2_CFG)] = 0x01000000; | |
162 | s->regs[REG_INDEX(REG_PLL_DDR_AUX)] = 0x00000001; | |
163 | s->regs[REG_INDEX(REG_PLL_DDR1_CFG)] = 0x0ccca000; | |
164 | s->regs[REG_INDEX(REG_SYS_32K_CLK)] = 0x0000000f; | |
165 | } | |
166 | ||
167 | static void allwinner_r40_ccu_init(Object *obj) | |
168 | { | |
169 | SysBusDevice *sbd = SYS_BUS_DEVICE(obj); | |
170 | AwR40ClockCtlState *s = AW_R40_CCU(obj); | |
171 | ||
172 | /* Memory mapping */ | |
173 | memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_r40_ccu_ops, s, | |
174 | TYPE_AW_R40_CCU, AW_R40_CCU_IOSIZE); | |
175 | sysbus_init_mmio(sbd, &s->iomem); | |
176 | } | |
177 | ||
178 | static const VMStateDescription allwinner_r40_ccu_vmstate = { | |
179 | .name = "allwinner-r40-ccu", | |
180 | .version_id = 1, | |
181 | .minimum_version_id = 1, | |
182 | .fields = (VMStateField[]) { | |
183 | VMSTATE_UINT32_ARRAY(regs, AwR40ClockCtlState, AW_R40_CCU_REGS_NUM), | |
184 | VMSTATE_END_OF_LIST() | |
185 | } | |
186 | }; | |
187 | ||
188 | static void allwinner_r40_ccu_class_init(ObjectClass *klass, void *data) | |
189 | { | |
190 | DeviceClass *dc = DEVICE_CLASS(klass); | |
191 | ||
192 | dc->reset = allwinner_r40_ccu_reset; | |
193 | dc->vmsd = &allwinner_r40_ccu_vmstate; | |
194 | } | |
195 | ||
196 | static const TypeInfo allwinner_r40_ccu_info = { | |
197 | .name = TYPE_AW_R40_CCU, | |
198 | .parent = TYPE_SYS_BUS_DEVICE, | |
199 | .instance_init = allwinner_r40_ccu_init, | |
200 | .instance_size = sizeof(AwR40ClockCtlState), | |
201 | .class_init = allwinner_r40_ccu_class_init, | |
202 | }; | |
203 | ||
204 | static void allwinner_r40_ccu_register(void) | |
205 | { | |
206 | type_register_static(&allwinner_r40_ccu_info); | |
207 | } | |
208 | ||
209 | type_init(allwinner_r40_ccu_register) |