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