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) 210