hw/misc/puv3_pm.c

   1 /*
   2  * Power Management device simulation in PKUnity SoC
   3  *
   4  * Copyright (C) 2010-2012 Guan Xuetao
   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 version 2 as
   8  * published by the Free Software Foundation, or any later version.
   9  * See the COPYING file in the top-level directory.
  10  */
  11 #include "hw/hw.h"
  12 #include "hw/sysbus.h"
  13
  14 #undef DEBUG_PUV3
  15 #include "hw/unicore32/puv3.h"
  16
  17 #define TYPE_PUV3_PM "puv3_pm"
  18 #define PUV3_PM(obj) OBJECT_CHECK(PUV3PMState, (obj), TYPE_PUV3_PM)
  19
  20 typedef struct PUV3PMState {
  21     SysBusDevice parent_obj;
  22
  23     MemoryRegion iomem;
  24
  25     uint32_t reg_PMCR;
  26     uint32_t reg_PCGR;
  27     uint32_t reg_PLL_SYS_CFG;
  28     uint32_t reg_PLL_DDR_CFG;
  29     uint32_t reg_PLL_VGA_CFG;
  30     uint32_t reg_DIVCFG;
  31 } PUV3PMState;
  32
  33 static uint64_t puv3_pm_read(void *opaque, hwaddr offset,
  34         unsigned size)
  35 {
  36     PUV3PMState *s = opaque;
  37     uint32_t ret = 0;
  38
  39     switch (offset) {
  40     case 0x14:
  41         ret = s->reg_PCGR;
  42         break;
  43     case 0x18:
  44         ret = s->reg_PLL_SYS_CFG;
  45         break;
  46     case 0x1c:
  47         ret = s->reg_PLL_DDR_CFG;
  48         break;
  49     case 0x20:
  50         ret = s->reg_PLL_VGA_CFG;
  51         break;
  52     case 0x24:
  53         ret = s->reg_DIVCFG;
  54         break;
  55     case 0x28: /* PLL SYS STATUS */
  56         ret = 0x00002401;
  57         break;
  58     case 0x2c: /* PLL DDR STATUS */
  59         ret = 0x00100c00;
  60         break;
  61     case 0x30: /* PLL VGA STATUS */
  62         ret = 0x00003801;
  63         break;
  64     case 0x34: /* DIV STATUS */
  65         ret = 0x22f52015;
  66         break;
  67     case 0x38: /* SW RESET */
  68         ret = 0x0;
  69         break;
  70     case 0x44: /* PLL DFC DONE */
  71         ret = 0x7;
  72         break;
  73     default:
  74         DPRINTF("Bad offset 0x%x\n", offset);
  75     }
  76     DPRINTF("offset 0x%x, value 0x%x\n", offset, ret);
  77
  78     return ret;
  79 }
  80
  81 static void puv3_pm_write(void *opaque, hwaddr offset,
  82         uint64_t value, unsigned size)
  83 {
  84     PUV3PMState *s = opaque;
  85
  86     switch (offset) {
  87     case 0x0:
  88         s->reg_PMCR = value;
  89         break;
  90     case 0x14:
  91         s->reg_PCGR = value;
  92         break;
  93     case 0x18:
  94         s->reg_PLL_SYS_CFG = value;
  95         break;
  96     case 0x1c:
  97         s->reg_PLL_DDR_CFG = value;
  98         break;
  99     case 0x20:
 100         s->reg_PLL_VGA_CFG = value;
 101         break;
 102     case 0x24:
 103     case 0x38:
 104         break;
 105     default:
 106         DPRINTF("Bad offset 0x%x\n", offset);
 107     }
 108     DPRINTF("offset 0x%x, value 0x%x\n", offset, value);
 109 }
 110
 111 static const MemoryRegionOps puv3_pm_ops = {
 112     .read = puv3_pm_read,
 113     .write = puv3_pm_write,
 114     .impl = {
 115         .min_access_size = 4,
 116         .max_access_size = 4,
 117     },
 118     .endianness = DEVICE_NATIVE_ENDIAN,
 119 };
 120
 121 static int puv3_pm_init(SysBusDevice *dev)
 122 {
 123     PUV3PMState *s = PUV3_PM(dev);
 124
 125     s->reg_PCGR = 0x0;
 126
 127     memory_region_init_io(&s->iomem, OBJECT(s), &puv3_pm_ops, s, "puv3_pm",
 128             PUV3_REGS_OFFSET);
 129     sysbus_init_mmio(dev, &s->iomem);
 130
 131     return 0;
 132 }
 133
 134 static void puv3_pm_class_init(ObjectClass *klass, void *data)
 135 {
 136     SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
 137
 138     sdc->init = puv3_pm_init;
 139 }
 140
 141 static const TypeInfo puv3_pm_info = {
 142     .name = TYPE_PUV3_PM,
 143     .parent = TYPE_SYS_BUS_DEVICE,
 144     .instance_size = sizeof(PUV3PMState),
 145     .class_init = puv3_pm_class_init,
 146 };
 147
 148 static void puv3_pm_register_type(void)
 149 {
 150     type_register_static(&puv3_pm_info);
 151 }
 152
 153 type_init(puv3_pm_register_type)