hw/misc/allwinner-h3-ccu.c

   1 /*
   2  * Allwinner H3 Clock Control Unit 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-ccu.h"
  27
  28 /* CCU register offsets */
  29 enum {
  30     REG_PLL_CPUX             = 0x0000, /* PLL CPUX Control */
  31     REG_PLL_AUDIO            = 0x0008, /* PLL Audio Control */
  32     REG_PLL_VIDEO            = 0x0010, /* PLL Video Control */
  33     REG_PLL_VE               = 0x0018, /* PLL VE Control */
  34     REG_PLL_DDR              = 0x0020, /* PLL DDR Control */
  35     REG_PLL_PERIPH0          = 0x0028, /* PLL Peripherals 0 Control */
  36     REG_PLL_GPU              = 0x0038, /* PLL GPU Control */
  37     REG_PLL_PERIPH1          = 0x0044, /* PLL Peripherals 1 Control */
  38     REG_PLL_DE               = 0x0048, /* PLL Display Engine Control */
  39     REG_CPUX_AXI             = 0x0050, /* CPUX/AXI Configuration */
  40     REG_APB1                 = 0x0054, /* ARM Peripheral Bus 1 Config */
  41     REG_APB2                 = 0x0058, /* ARM Peripheral Bus 2 Config */
  42     REG_DRAM_CFG             = 0x00F4, /* DRAM Configuration */
  43     REG_MBUS                 = 0x00FC, /* MBUS Reset */
  44     REG_PLL_TIME0            = 0x0200, /* PLL Stable Time 0 */
  45     REG_PLL_TIME1            = 0x0204, /* PLL Stable Time 1 */
  46     REG_PLL_CPUX_BIAS        = 0x0220, /* PLL CPUX Bias */
  47     REG_PLL_AUDIO_BIAS       = 0x0224, /* PLL Audio Bias */
  48     REG_PLL_VIDEO_BIAS       = 0x0228, /* PLL Video Bias */
  49     REG_PLL_VE_BIAS          = 0x022C, /* PLL VE Bias */
  50     REG_PLL_DDR_BIAS         = 0x0230, /* PLL DDR Bias */
  51     REG_PLL_PERIPH0_BIAS     = 0x0234, /* PLL Peripherals 0 Bias */
  52     REG_PLL_GPU_BIAS         = 0x023C, /* PLL GPU Bias */
  53     REG_PLL_PERIPH1_BIAS     = 0x0244, /* PLL Peripherals 1 Bias */
  54     REG_PLL_DE_BIAS          = 0x0248, /* PLL Display Engine Bias */
  55     REG_PLL_CPUX_TUNING      = 0x0250, /* PLL CPUX Tuning */
  56     REG_PLL_DDR_TUNING       = 0x0260, /* PLL DDR Tuning */
  57 };
  58
  59 #define REG_INDEX(offset)    (offset / sizeof(uint32_t))
  60
  61 /* CCU register flags */
  62 enum {
  63     REG_DRAM_CFG_UPDATE      = (1 << 16),
  64 };
  65
  66 enum {
  67     REG_PLL_ENABLE           = (1 << 31),
  68     REG_PLL_LOCK             = (1 << 28),
  69 };
  70
  71
  72 /* CCU register reset values */
  73 enum {
  74     REG_PLL_CPUX_RST         = 0x00001000,
  75     REG_PLL_AUDIO_RST        = 0x00035514,
  76     REG_PLL_VIDEO_RST        = 0x03006207,
  77     REG_PLL_VE_RST           = 0x03006207,
  78     REG_PLL_DDR_RST          = 0x00001000,
  79     REG_PLL_PERIPH0_RST      = 0x00041811,
  80     REG_PLL_GPU_RST          = 0x03006207,
  81     REG_PLL_PERIPH1_RST      = 0x00041811,
  82     REG_PLL_DE_RST           = 0x03006207,
  83     REG_CPUX_AXI_RST         = 0x00010000,
  84     REG_APB1_RST             = 0x00001010,
  85     REG_APB2_RST             = 0x01000000,
  86     REG_DRAM_CFG_RST         = 0x00000000,
  87     REG_MBUS_RST             = 0x80000000,
  88     REG_PLL_TIME0_RST        = 0x000000FF,
  89     REG_PLL_TIME1_RST        = 0x000000FF,
  90     REG_PLL_CPUX_BIAS_RST    = 0x08100200,
  91     REG_PLL_AUDIO_BIAS_RST   = 0x10100000,
  92     REG_PLL_VIDEO_BIAS_RST   = 0x10100000,
  93     REG_PLL_VE_BIAS_RST      = 0x10100000,
  94     REG_PLL_DDR_BIAS_RST     = 0x81104000,
  95     REG_PLL_PERIPH0_BIAS_RST = 0x10100010,
  96     REG_PLL_GPU_BIAS_RST     = 0x10100000,
  97     REG_PLL_PERIPH1_BIAS_RST = 0x10100010,
  98     REG_PLL_DE_BIAS_RST      = 0x10100000,
  99     REG_PLL_CPUX_TUNING_RST  = 0x0A101000,
 100     REG_PLL_DDR_TUNING_RST   = 0x14880000,
 101 };
 102
 103 static uint64_t allwinner_h3_ccu_read(void *opaque, hwaddr offset,
 104                                       unsigned size)
 105 {
 106     const AwH3ClockCtlState *s = AW_H3_CCU(opaque);
 107     const uint32_t idx = REG_INDEX(offset);
 108
 109     switch (offset) {
 110     case 0x308 ... AW_H3_CCU_IOSIZE:
 111         qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
 112                       __func__, (uint32_t)offset);
 113         return 0;
 114     }
 115
 116     return s->regs[idx];
 117 }
 118
 119 static void allwinner_h3_ccu_write(void *opaque, hwaddr offset,
 120                                    uint64_t val, unsigned size)
 121 {
 122     AwH3ClockCtlState *s = AW_H3_CCU(opaque);
 123     const uint32_t idx = REG_INDEX(offset);
 124
 125     switch (offset) {
 126     case REG_DRAM_CFG:    /* DRAM Configuration */
 127         val &= ~REG_DRAM_CFG_UPDATE;
 128         break;
 129     case REG_PLL_CPUX:    /* PLL CPUX Control */
 130     case REG_PLL_AUDIO:   /* PLL Audio Control */
 131     case REG_PLL_VIDEO:   /* PLL Video Control */
 132     case REG_PLL_VE:      /* PLL VE Control */
 133     case REG_PLL_DDR:     /* PLL DDR Control */
 134     case REG_PLL_PERIPH0: /* PLL Peripherals 0 Control */
 135     case REG_PLL_GPU:     /* PLL GPU Control */
 136     case REG_PLL_PERIPH1: /* PLL Peripherals 1 Control */
 137     case REG_PLL_DE:      /* PLL Display Engine Control */
 138         if (val & REG_PLL_ENABLE) {
 139             val |= REG_PLL_LOCK;
 140         }
 141         break;
 142     case 0x308 ... AW_H3_CCU_IOSIZE:
 143         qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
 144                       __func__, (uint32_t)offset);
 145         break;
 146     default:
 147         qemu_log_mask(LOG_UNIMP, "%s: unimplemented write offset 0x%04x\n",
 148                       __func__, (uint32_t)offset);
 149         break;
 150     }
 151
 152     s->regs[idx] = (uint32_t) val;
 153 }
 154
 155 static const MemoryRegionOps allwinner_h3_ccu_ops = {
 156     .read = allwinner_h3_ccu_read,
 157     .write = allwinner_h3_ccu_write,
 158     .endianness = DEVICE_NATIVE_ENDIAN,
 159     .valid = {
 160         .min_access_size = 4,
 161         .max_access_size = 4,
 162     },
 163     .impl.min_access_size = 4,
 164 };
 165
 166 static void allwinner_h3_ccu_reset(DeviceState *dev)
 167 {
 168     AwH3ClockCtlState *s = AW_H3_CCU(dev);
 169
 170     /* Set default values for registers */
 171     s->regs[REG_INDEX(REG_PLL_CPUX)] = REG_PLL_CPUX_RST;
 172     s->regs[REG_INDEX(REG_PLL_AUDIO)] = REG_PLL_AUDIO_RST;
 173     s->regs[REG_INDEX(REG_PLL_VIDEO)] = REG_PLL_VIDEO_RST;
 174     s->regs[REG_INDEX(REG_PLL_VE)] = REG_PLL_VE_RST;
 175     s->regs[REG_INDEX(REG_PLL_DDR)] = REG_PLL_DDR_RST;
 176     s->regs[REG_INDEX(REG_PLL_PERIPH0)] = REG_PLL_PERIPH0_RST;
 177     s->regs[REG_INDEX(REG_PLL_GPU)] = REG_PLL_GPU_RST;
 178     s->regs[REG_INDEX(REG_PLL_PERIPH1)] = REG_PLL_PERIPH1_RST;
 179     s->regs[REG_INDEX(REG_PLL_DE)] = REG_PLL_DE_RST;
 180     s->regs[REG_INDEX(REG_CPUX_AXI)] = REG_CPUX_AXI_RST;
 181     s->regs[REG_INDEX(REG_APB1)] = REG_APB1_RST;
 182     s->regs[REG_INDEX(REG_APB2)] = REG_APB2_RST;
 183     s->regs[REG_INDEX(REG_DRAM_CFG)] = REG_DRAM_CFG_RST;
 184     s->regs[REG_INDEX(REG_MBUS)] = REG_MBUS_RST;
 185     s->regs[REG_INDEX(REG_PLL_TIME0)] = REG_PLL_TIME0_RST;
 186     s->regs[REG_INDEX(REG_PLL_TIME1)] = REG_PLL_TIME1_RST;
 187     s->regs[REG_INDEX(REG_PLL_CPUX_BIAS)] = REG_PLL_CPUX_BIAS_RST;
 188     s->regs[REG_INDEX(REG_PLL_AUDIO_BIAS)] = REG_PLL_AUDIO_BIAS_RST;
 189     s->regs[REG_INDEX(REG_PLL_VIDEO_BIAS)] = REG_PLL_VIDEO_BIAS_RST;
 190     s->regs[REG_INDEX(REG_PLL_VE_BIAS)] = REG_PLL_VE_BIAS_RST;
 191     s->regs[REG_INDEX(REG_PLL_DDR_BIAS)] = REG_PLL_DDR_BIAS_RST;
 192     s->regs[REG_INDEX(REG_PLL_PERIPH0_BIAS)] = REG_PLL_PERIPH0_BIAS_RST;
 193     s->regs[REG_INDEX(REG_PLL_GPU_BIAS)] = REG_PLL_GPU_BIAS_RST;
 194     s->regs[REG_INDEX(REG_PLL_PERIPH1_BIAS)] = REG_PLL_PERIPH1_BIAS_RST;
 195     s->regs[REG_INDEX(REG_PLL_DE_BIAS)] = REG_PLL_DE_BIAS_RST;
 196     s->regs[REG_INDEX(REG_PLL_CPUX_TUNING)] = REG_PLL_CPUX_TUNING_RST;
 197     s->regs[REG_INDEX(REG_PLL_DDR_TUNING)] = REG_PLL_DDR_TUNING_RST;
 198 }
 199
 200 static void allwinner_h3_ccu_init(Object *obj)
 201 {
 202     SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
 203     AwH3ClockCtlState *s = AW_H3_CCU(obj);
 204
 205     /* Memory mapping */
 206     memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_h3_ccu_ops, s,
 207                           TYPE_AW_H3_CCU, AW_H3_CCU_IOSIZE);
 208     sysbus_init_mmio(sbd, &s->iomem);
 209 }
 210
 211 static const VMStateDescription allwinner_h3_ccu_vmstate = {
 212     .name = "allwinner-h3-ccu",
 213     .version_id = 1,
 214     .minimum_version_id = 1,
 215     .fields = (VMStateField[]) {
 216         VMSTATE_UINT32_ARRAY(regs, AwH3ClockCtlState, AW_H3_CCU_REGS_NUM),
 217         VMSTATE_END_OF_LIST()
 218     }
 219 };
 220
 221 static void allwinner_h3_ccu_class_init(ObjectClass *klass, void *data)
 222 {
 223     DeviceClass *dc = DEVICE_CLASS(klass);
 224
 225     dc->reset = allwinner_h3_ccu_reset;
 226     dc->vmsd = &allwinner_h3_ccu_vmstate;
 227 }
 228
 229 static const TypeInfo allwinner_h3_ccu_info = {
 230     .name          = TYPE_AW_H3_CCU,
 231     .parent        = TYPE_SYS_BUS_DEVICE,
 232     .instance_init = allwinner_h3_ccu_init,
 233     .instance_size = sizeof(AwH3ClockCtlState),
 234     .class_init    = allwinner_h3_ccu_class_init,
 235 };
 236
 237 static void allwinner_h3_ccu_register(void)
 238 {
 239     type_register_static(&allwinner_h3_ccu_info);
 240 }
 241
 242 type_init(allwinner_h3_ccu_register)