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 typedef struct {
  18     SysBusDevice busdev;
  19     MemoryRegion iomem;
  20
  21     uint32_t reg_PMCR;
  22     uint32_t reg_PCGR;
  23     uint32_t reg_PLL_SYS_CFG;
  24     uint32_t reg_PLL_DDR_CFG;
  25     uint32_t reg_PLL_VGA_CFG;
  26     uint32_t reg_DIVCFG;
  27 } PUV3PMState;
  28
  29 static uint64_t puv3_pm_read(void *opaque, hwaddr offset,
  30         unsigned size)
  31 {
  32     PUV3PMState *s = opaque;
  33     uint32_t ret = 0;
  34
  35     switch (offset) {
  36     case 0x14:
  37         ret = s->reg_PCGR;
  38         break;
  39     case 0x18:
  40         ret = s->reg_PLL_SYS_CFG;
  41         break;
  42     case 0x1c:
  43         ret = s->reg_PLL_DDR_CFG;
  44         break;
  45     case 0x20:
  46         ret = s->reg_PLL_VGA_CFG;
  47         break;
  48     case 0x24:
  49         ret = s->reg_DIVCFG;
  50         break;
  51     case 0x28: /* PLL SYS STATUS */
  52         ret = 0x00002401;
  53         break;
  54     case 0x2c: /* PLL DDR STATUS */
  55         ret = 0x00100c00;
  56         break;
  57     case 0x30: /* PLL VGA STATUS */
  58         ret = 0x00003801;
  59         break;
  60     case 0x34: /* DIV STATUS */
  61         ret = 0x22f52015;
  62         break;
  63     case 0x38: /* SW RESET */
  64         ret = 0x0;
  65         break;
  66     case 0x44: /* PLL DFC DONE */
  67         ret = 0x7;
  68         break;
  69     default:
  70         DPRINTF("Bad offset 0x%x\n", offset);
  71     }
  72     DPRINTF("offset 0x%x, value 0x%x\n", offset, ret);
  73
  74     return ret;
  75 }
  76
  77 static void puv3_pm_write(void *opaque, hwaddr offset,
  78         uint64_t value, unsigned size)
  79 {
  80     PUV3PMState *s = opaque;
  81
  82     switch (offset) {
  83     case 0x0:
  84         s->reg_PMCR = value;
  85         break;
  86     case 0x14:
  87         s->reg_PCGR = value;
  88         break;
  89     case 0x18:
  90         s->reg_PLL_SYS_CFG = value;
  91         break;
  92     case 0x1c:
  93         s->reg_PLL_DDR_CFG = value;
  94         break;
  95     case 0x20:
  96         s->reg_PLL_VGA_CFG = value;
  97         break;
  98     case 0x24:
  99     case 0x38:
 100         break;
 101     default:
 102         DPRINTF("Bad offset 0x%x\n", offset);
 103     }
 104     DPRINTF("offset 0x%x, value 0x%x\n", offset, value);
 105 }
 106
 107 static const MemoryRegionOps puv3_pm_ops = {
 108     .read = puv3_pm_read,
 109     .write = puv3_pm_write,
 110     .impl = {
 111         .min_access_size = 4,
 112         .max_access_size = 4,
 113     },
 114     .endianness = DEVICE_NATIVE_ENDIAN,
 115 };
 116
 117 static int puv3_pm_init(SysBusDevice *dev)
 118 {
 119     PUV3PMState *s = FROM_SYSBUS(PUV3PMState, dev);
 120
 121     s->reg_PCGR = 0x0;
 122
 123     memory_region_init_io(&s->iomem, &puv3_pm_ops, s, "puv3_pm",
 124             PUV3_REGS_OFFSET);
 125     sysbus_init_mmio(dev, &s->iomem);
 126
 127     return 0;
 128 }
 129
 130 static void puv3_pm_class_init(ObjectClass *klass, void *data)
 131 {
 132     SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
 133
 134     sdc->init = puv3_pm_init;
 135 }
 136
 137 static const TypeInfo puv3_pm_info = {
 138     .name = "puv3_pm",
 139     .parent = TYPE_SYS_BUS_DEVICE,
 140     .instance_size = sizeof(PUV3PMState),
 141     .class_init = puv3_pm_class_init,
 142 };
 143
 144 static void puv3_pm_register_type(void)
 145 {
 146     type_register_static(&puv3_pm_info);
 147 }
 148
 149 type_init(puv3_pm_register_type)