hw/misc/stm32f2xx_syscfg.c

   1 /*
   2  * STM32F2XX SYSCFG
   3  *
   4  * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "hw/misc/stm32f2xx_syscfg.h"
  27 #include "qemu/log.h"
  28 #include "qemu/module.h"
  29
  30 #ifndef STM_SYSCFG_ERR_DEBUG
  31 #define STM_SYSCFG_ERR_DEBUG 0
  32 #endif
  33
  34 #define DB_PRINT_L(lvl, fmt, args...) do { \
  35     if (STM_SYSCFG_ERR_DEBUG >= lvl) { \
  36         qemu_log("%s: " fmt, __func__, ## args); \
  37     } \
  38 } while (0)
  39
  40 #define DB_PRINT(fmt, args...) DB_PRINT_L(1, fmt, ## args)
  41
  42 static void stm32f2xx_syscfg_reset(DeviceState *dev)
  43 {
  44     STM32F2XXSyscfgState *s = STM32F2XX_SYSCFG(dev);
  45
  46     s->syscfg_memrmp = 0x00000000;
  47     s->syscfg_pmc = 0x00000000;
  48     s->syscfg_exticr1 = 0x00000000;
  49     s->syscfg_exticr2 = 0x00000000;
  50     s->syscfg_exticr3 = 0x00000000;
  51     s->syscfg_exticr4 = 0x00000000;
  52     s->syscfg_cmpcr = 0x00000000;
  53 }
  54
  55 static uint64_t stm32f2xx_syscfg_read(void *opaque, hwaddr addr,
  56                                      unsigned int size)
  57 {
  58     STM32F2XXSyscfgState *s = opaque;
  59
  60     DB_PRINT("0x%"HWADDR_PRIx"\n", addr);
  61
  62     switch (addr) {
  63     case SYSCFG_MEMRMP:
  64         return s->syscfg_memrmp;
  65     case SYSCFG_PMC:
  66         return s->syscfg_pmc;
  67     case SYSCFG_EXTICR1:
  68         return s->syscfg_exticr1;
  69     case SYSCFG_EXTICR2:
  70         return s->syscfg_exticr2;
  71     case SYSCFG_EXTICR3:
  72         return s->syscfg_exticr3;
  73     case SYSCFG_EXTICR4:
  74         return s->syscfg_exticr4;
  75     case SYSCFG_CMPCR:
  76         return s->syscfg_cmpcr;
  77     default:
  78         qemu_log_mask(LOG_GUEST_ERROR,
  79                       "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr);
  80         return 0;
  81     }
  82
  83     return 0;
  84 }
  85
  86 static void stm32f2xx_syscfg_write(void *opaque, hwaddr addr,
  87                        uint64_t val64, unsigned int size)
  88 {
  89     STM32F2XXSyscfgState *s = opaque;
  90     uint32_t value = val64;
  91
  92     DB_PRINT("0x%x, 0x%"HWADDR_PRIx"\n", value, addr);
  93
  94     switch (addr) {
  95     case SYSCFG_MEMRMP:
  96         qemu_log_mask(LOG_UNIMP,
  97                       "%s: Changeing the memory mapping isn't supported " \
  98                       "in QEMU\n", __func__);
  99         return;
 100     case SYSCFG_PMC:
 101         qemu_log_mask(LOG_UNIMP,
 102                       "%s: Changeing the memory mapping isn't supported " \
 103                       "in QEMU\n", __func__);
 104         return;
 105     case SYSCFG_EXTICR1:
 106         s->syscfg_exticr1 = (value & 0xFFFF);
 107         return;
 108     case SYSCFG_EXTICR2:
 109         s->syscfg_exticr2 = (value & 0xFFFF);
 110         return;
 111     case SYSCFG_EXTICR3:
 112         s->syscfg_exticr3 = (value & 0xFFFF);
 113         return;
 114     case SYSCFG_EXTICR4:
 115         s->syscfg_exticr4 = (value & 0xFFFF);
 116         return;
 117     case SYSCFG_CMPCR:
 118         s->syscfg_cmpcr = value;
 119         return;
 120     default:
 121         qemu_log_mask(LOG_GUEST_ERROR,
 122                       "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr);
 123     }
 124 }
 125
 126 static const MemoryRegionOps stm32f2xx_syscfg_ops = {
 127     .read = stm32f2xx_syscfg_read,
 128     .write = stm32f2xx_syscfg_write,
 129     .endianness = DEVICE_NATIVE_ENDIAN,
 130 };
 131
 132 static void stm32f2xx_syscfg_init(Object *obj)
 133 {
 134     STM32F2XXSyscfgState *s = STM32F2XX_SYSCFG(obj);
 135
 136     memory_region_init_io(&s->mmio, obj, &stm32f2xx_syscfg_ops, s,
 137                           TYPE_STM32F2XX_SYSCFG, 0x400);
 138     sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
 139 }
 140
 141 static void stm32f2xx_syscfg_class_init(ObjectClass *klass, void *data)
 142 {
 143     DeviceClass *dc = DEVICE_CLASS(klass);
 144
 145     dc->reset = stm32f2xx_syscfg_reset;
 146 }
 147
 148 static const TypeInfo stm32f2xx_syscfg_info = {
 149     .name          = TYPE_STM32F2XX_SYSCFG,
 150     .parent        = TYPE_SYS_BUS_DEVICE,
 151     .instance_size = sizeof(STM32F2XXSyscfgState),
 152     .instance_init = stm32f2xx_syscfg_init,
 153     .class_init    = stm32f2xx_syscfg_class_init,
 154 };
 155
 156 static void stm32f2xx_syscfg_register_types(void)
 157 {
 158     type_register_static(&stm32f2xx_syscfg_info);
 159 }
 160
 161 type_init(stm32f2xx_syscfg_register_types)