/* * Allwinner H3 Clock Control Unit emulation * * Copyright (C) 2019 Niek Linnenbank * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include "qemu/osdep.h" #include "qemu/units.h" #include "hw/sysbus.h" #include "migration/vmstate.h" #include "qemu/log.h" #include "qemu/module.h" #include "hw/misc/allwinner-h3-ccu.h" /* CCU register offsets */ enum { REG_PLL_CPUX = 0x0000, /* PLL CPUX Control */ REG_PLL_AUDIO = 0x0008, /* PLL Audio Control */ REG_PLL_VIDEO = 0x0010, /* PLL Video Control */ REG_PLL_VE = 0x0018, /* PLL VE Control */ REG_PLL_DDR = 0x0020, /* PLL DDR Control */ REG_PLL_PERIPH0 = 0x0028, /* PLL Peripherals 0 Control */ REG_PLL_GPU = 0x0038, /* PLL GPU Control */ REG_PLL_PERIPH1 = 0x0044, /* PLL Peripherals 1 Control */ REG_PLL_DE = 0x0048, /* PLL Display Engine Control */ REG_CPUX_AXI = 0x0050, /* CPUX/AXI Configuration */ REG_APB1 = 0x0054, /* ARM Peripheral Bus 1 Config */ REG_APB2 = 0x0058, /* ARM Peripheral Bus 2 Config */ REG_DRAM_CFG = 0x00F4, /* DRAM Configuration */ REG_MBUS = 0x00FC, /* MBUS Reset */ REG_PLL_TIME0 = 0x0200, /* PLL Stable Time 0 */ REG_PLL_TIME1 = 0x0204, /* PLL Stable Time 1 */ REG_PLL_CPUX_BIAS = 0x0220, /* PLL CPUX Bias */ REG_PLL_AUDIO_BIAS = 0x0224, /* PLL Audio Bias */ REG_PLL_VIDEO_BIAS = 0x0228, /* PLL Video Bias */ REG_PLL_VE_BIAS = 0x022C, /* PLL VE Bias */ REG_PLL_DDR_BIAS = 0x0230, /* PLL DDR Bias */ REG_PLL_PERIPH0_BIAS = 0x0234, /* PLL Peripherals 0 Bias */ REG_PLL_GPU_BIAS = 0x023C, /* PLL GPU Bias */ REG_PLL_PERIPH1_BIAS = 0x0244, /* PLL Peripherals 1 Bias */ REG_PLL_DE_BIAS = 0x0248, /* PLL Display Engine Bias */ REG_PLL_CPUX_TUNING = 0x0250, /* PLL CPUX Tuning */ REG_PLL_DDR_TUNING = 0x0260, /* PLL DDR Tuning */ }; #define REG_INDEX(offset) (offset / sizeof(uint32_t)) /* CCU register flags */ enum { REG_DRAM_CFG_UPDATE = (1 << 16), }; enum { REG_PLL_ENABLE = (1 << 31), REG_PLL_LOCK = (1 << 28), }; /* CCU register reset values */ enum { REG_PLL_CPUX_RST = 0x00001000, REG_PLL_AUDIO_RST = 0x00035514, REG_PLL_VIDEO_RST = 0x03006207, REG_PLL_VE_RST = 0x03006207, REG_PLL_DDR_RST = 0x00001000, REG_PLL_PERIPH0_RST = 0x00041811, REG_PLL_GPU_RST = 0x03006207, REG_PLL_PERIPH1_RST = 0x00041811, REG_PLL_DE_RST = 0x03006207, REG_CPUX_AXI_RST = 0x00010000, REG_APB1_RST = 0x00001010, REG_APB2_RST = 0x01000000, REG_DRAM_CFG_RST = 0x00000000, REG_MBUS_RST = 0x80000000, REG_PLL_TIME0_RST = 0x000000FF, REG_PLL_TIME1_RST = 0x000000FF, REG_PLL_CPUX_BIAS_RST = 0x08100200, REG_PLL_AUDIO_BIAS_RST = 0x10100000, REG_PLL_VIDEO_BIAS_RST = 0x10100000, REG_PLL_VE_BIAS_RST = 0x10100000, REG_PLL_DDR_BIAS_RST = 0x81104000, REG_PLL_PERIPH0_BIAS_RST = 0x10100010, REG_PLL_GPU_BIAS_RST = 0x10100000, REG_PLL_PERIPH1_BIAS_RST = 0x10100010, REG_PLL_DE_BIAS_RST = 0x10100000, REG_PLL_CPUX_TUNING_RST = 0x0A101000, REG_PLL_DDR_TUNING_RST = 0x14880000, }; static uint64_t allwinner_h3_ccu_read(void *opaque, hwaddr offset, unsigned size) { const AwH3ClockCtlState *s = AW_H3_CCU(opaque); const uint32_t idx = REG_INDEX(offset); switch (offset) { case 0x308 ... AW_H3_CCU_IOSIZE: qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n", __func__, (uint32_t)offset); return 0; } return s->regs[idx]; } static void allwinner_h3_ccu_write(void *opaque, hwaddr offset, uint64_t val, unsigned size) { AwH3ClockCtlState *s = AW_H3_CCU(opaque); const uint32_t idx = REG_INDEX(offset); switch (offset) { case REG_DRAM_CFG: /* DRAM Configuration */ val &= ~REG_DRAM_CFG_UPDATE; break; case REG_PLL_CPUX: /* PLL CPUX Control */ case REG_PLL_AUDIO: /* PLL Audio Control */ case REG_PLL_VIDEO: /* PLL Video Control */ case REG_PLL_VE: /* PLL VE Control */ case REG_PLL_DDR: /* PLL DDR Control */ case REG_PLL_PERIPH0: /* PLL Peripherals 0 Control */ case REG_PLL_GPU: /* PLL GPU Control */ case REG_PLL_PERIPH1: /* PLL Peripherals 1 Control */ case REG_PLL_DE: /* PLL Display Engine Control */ if (val & REG_PLL_ENABLE) { val |= REG_PLL_LOCK; } break; case 0x308 ... AW_H3_CCU_IOSIZE: qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n", __func__, (uint32_t)offset); break; default: qemu_log_mask(LOG_UNIMP, "%s: unimplemented write offset 0x%04x\n", __func__, (uint32_t)offset); break; } s->regs[idx] = (uint32_t) val; } static const MemoryRegionOps allwinner_h3_ccu_ops = { .read = allwinner_h3_ccu_read, .write = allwinner_h3_ccu_write, .endianness = DEVICE_NATIVE_ENDIAN, .valid = { .min_access_size = 4, .max_access_size = 4, }, .impl.min_access_size = 4, }; static void allwinner_h3_ccu_reset(DeviceState *dev) { AwH3ClockCtlState *s = AW_H3_CCU(dev); /* Set default values for registers */ s->regs[REG_INDEX(REG_PLL_CPUX)] = REG_PLL_CPUX_RST; s->regs[REG_INDEX(REG_PLL_AUDIO)] = REG_PLL_AUDIO_RST; s->regs[REG_INDEX(REG_PLL_VIDEO)] = REG_PLL_VIDEO_RST; s->regs[REG_INDEX(REG_PLL_VE)] = REG_PLL_VE_RST; s->regs[REG_INDEX(REG_PLL_DDR)] = REG_PLL_DDR_RST; s->regs[REG_INDEX(REG_PLL_PERIPH0)] = REG_PLL_PERIPH0_RST; s->regs[REG_INDEX(REG_PLL_GPU)] = REG_PLL_GPU_RST; s->regs[REG_INDEX(REG_PLL_PERIPH1)] = REG_PLL_PERIPH1_RST; s->regs[REG_INDEX(REG_PLL_DE)] = REG_PLL_DE_RST; s->regs[REG_INDEX(REG_CPUX_AXI)] = REG_CPUX_AXI_RST; s->regs[REG_INDEX(REG_APB1)] = REG_APB1_RST; s->regs[REG_INDEX(REG_APB2)] = REG_APB2_RST; s->regs[REG_INDEX(REG_DRAM_CFG)] = REG_DRAM_CFG_RST; s->regs[REG_INDEX(REG_MBUS)] = REG_MBUS_RST; s->regs[REG_INDEX(REG_PLL_TIME0)] = REG_PLL_TIME0_RST; s->regs[REG_INDEX(REG_PLL_TIME1)] = REG_PLL_TIME1_RST; s->regs[REG_INDEX(REG_PLL_CPUX_BIAS)] = REG_PLL_CPUX_BIAS_RST; s->regs[REG_INDEX(REG_PLL_AUDIO_BIAS)] = REG_PLL_AUDIO_BIAS_RST; s->regs[REG_INDEX(REG_PLL_VIDEO_BIAS)] = REG_PLL_VIDEO_BIAS_RST; s->regs[REG_INDEX(REG_PLL_VE_BIAS)] = REG_PLL_VE_BIAS_RST; s->regs[REG_INDEX(REG_PLL_DDR_BIAS)] = REG_PLL_DDR_BIAS_RST; s->regs[REG_INDEX(REG_PLL_PERIPH0_BIAS)] = REG_PLL_PERIPH0_BIAS_RST; s->regs[REG_INDEX(REG_PLL_GPU_BIAS)] = REG_PLL_GPU_BIAS_RST; s->regs[REG_INDEX(REG_PLL_PERIPH1_BIAS)] = REG_PLL_PERIPH1_BIAS_RST; s->regs[REG_INDEX(REG_PLL_DE_BIAS)] = REG_PLL_DE_BIAS_RST; s->regs[REG_INDEX(REG_PLL_CPUX_TUNING)] = REG_PLL_CPUX_TUNING_RST; s->regs[REG_INDEX(REG_PLL_DDR_TUNING)] = REG_PLL_DDR_TUNING_RST; } static void allwinner_h3_ccu_init(Object *obj) { SysBusDevice *sbd = SYS_BUS_DEVICE(obj); AwH3ClockCtlState *s = AW_H3_CCU(obj); /* Memory mapping */ memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_h3_ccu_ops, s, TYPE_AW_H3_CCU, AW_H3_CCU_IOSIZE); sysbus_init_mmio(sbd, &s->iomem); } static const VMStateDescription allwinner_h3_ccu_vmstate = { .name = "allwinner-h3-ccu", .version_id = 1, .minimum_version_id = 1, .fields = (const VMStateField[]) { VMSTATE_UINT32_ARRAY(regs, AwH3ClockCtlState, AW_H3_CCU_REGS_NUM), VMSTATE_END_OF_LIST() } }; static void allwinner_h3_ccu_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); device_class_set_legacy_reset(dc, allwinner_h3_ccu_reset); dc->vmsd = &allwinner_h3_ccu_vmstate; } static const TypeInfo allwinner_h3_ccu_info = { .name = TYPE_AW_H3_CCU, .parent = TYPE_SYS_BUS_DEVICE, .instance_init = allwinner_h3_ccu_init, .instance_size = sizeof(AwH3ClockCtlState), .class_init = allwinner_h3_ccu_class_init, }; static void allwinner_h3_ccu_register(void) { type_register_static(&allwinner_h3_ccu_info); } type_init(allwinner_h3_ccu_register)