stm32f4xx_syscfg.c (5574B)
1 /* 2 * STM32F4xx 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 "qemu/log.h" 27 #include "trace.h" 28 #include "hw/irq.h" 29 #include "migration/vmstate.h" 30 #include "hw/misc/stm32f4xx_syscfg.h" 31 32 static void stm32f4xx_syscfg_reset(DeviceState *dev) 33 { 34 STM32F4xxSyscfgState *s = STM32F4XX_SYSCFG(dev); 35 36 s->syscfg_memrmp = 0x00000000; 37 s->syscfg_pmc = 0x00000000; 38 s->syscfg_exticr[0] = 0x00000000; 39 s->syscfg_exticr[1] = 0x00000000; 40 s->syscfg_exticr[2] = 0x00000000; 41 s->syscfg_exticr[3] = 0x00000000; 42 s->syscfg_cmpcr = 0x00000000; 43 } 44 45 static void stm32f4xx_syscfg_set_irq(void *opaque, int irq, int level) 46 { 47 STM32F4xxSyscfgState *s = opaque; 48 int icrreg = irq / 4; 49 int startbit = (irq & 3) * 4; 50 uint8_t config = irq / 16; 51 52 trace_stm32f4xx_syscfg_set_irq(irq / 16, irq % 16, level); 53 54 g_assert(icrreg < SYSCFG_NUM_EXTICR); 55 56 if (extract32(s->syscfg_exticr[icrreg], startbit, 4) == config) { 57 qemu_set_irq(s->gpio_out[irq], level); 58 trace_stm32f4xx_pulse_exti(irq); 59 } 60 } 61 62 static uint64_t stm32f4xx_syscfg_read(void *opaque, hwaddr addr, 63 unsigned int size) 64 { 65 STM32F4xxSyscfgState *s = opaque; 66 67 trace_stm32f4xx_syscfg_read(addr); 68 69 switch (addr) { 70 case SYSCFG_MEMRMP: 71 return s->syscfg_memrmp; 72 case SYSCFG_PMC: 73 return s->syscfg_pmc; 74 case SYSCFG_EXTICR1...SYSCFG_EXTICR4: 75 return s->syscfg_exticr[addr / 4 - SYSCFG_EXTICR1 / 4]; 76 case SYSCFG_CMPCR: 77 return s->syscfg_cmpcr; 78 default: 79 qemu_log_mask(LOG_GUEST_ERROR, 80 "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr); 81 return 0; 82 } 83 } 84 85 static void stm32f4xx_syscfg_write(void *opaque, hwaddr addr, 86 uint64_t val64, unsigned int size) 87 { 88 STM32F4xxSyscfgState *s = opaque; 89 uint32_t value = val64; 90 91 trace_stm32f4xx_syscfg_write(value, addr); 92 93 switch (addr) { 94 case SYSCFG_MEMRMP: 95 qemu_log_mask(LOG_UNIMP, 96 "%s: Changing the memory mapping isn't supported " \ 97 "in QEMU\n", __func__); 98 return; 99 case SYSCFG_PMC: 100 qemu_log_mask(LOG_UNIMP, 101 "%s: Changing the memory mapping isn't supported " \ 102 "in QEMU\n", __func__); 103 return; 104 case SYSCFG_EXTICR1...SYSCFG_EXTICR4: 105 s->syscfg_exticr[addr / 4 - SYSCFG_EXTICR1 / 4] = (value & 0xFFFF); 106 return; 107 case SYSCFG_CMPCR: 108 s->syscfg_cmpcr = value; 109 return; 110 default: 111 qemu_log_mask(LOG_GUEST_ERROR, 112 "%s: Bad offset 0x%"HWADDR_PRIx"\n", __func__, addr); 113 } 114 } 115 116 static const MemoryRegionOps stm32f4xx_syscfg_ops = { 117 .read = stm32f4xx_syscfg_read, 118 .write = stm32f4xx_syscfg_write, 119 .endianness = DEVICE_NATIVE_ENDIAN, 120 }; 121 122 static void stm32f4xx_syscfg_init(Object *obj) 123 { 124 STM32F4xxSyscfgState *s = STM32F4XX_SYSCFG(obj); 125 126 sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq); 127 128 memory_region_init_io(&s->mmio, obj, &stm32f4xx_syscfg_ops, s, 129 TYPE_STM32F4XX_SYSCFG, 0x400); 130 sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio); 131 132 qdev_init_gpio_in(DEVICE(obj), stm32f4xx_syscfg_set_irq, 16 * 9); 133 qdev_init_gpio_out(DEVICE(obj), s->gpio_out, 16); 134 } 135 136 static const VMStateDescription vmstate_stm32f4xx_syscfg = { 137 .name = TYPE_STM32F4XX_SYSCFG, 138 .version_id = 1, 139 .minimum_version_id = 1, 140 .fields = (VMStateField[]) { 141 VMSTATE_UINT32(syscfg_memrmp, STM32F4xxSyscfgState), 142 VMSTATE_UINT32(syscfg_pmc, STM32F4xxSyscfgState), 143 VMSTATE_UINT32_ARRAY(syscfg_exticr, STM32F4xxSyscfgState, 144 SYSCFG_NUM_EXTICR), 145 VMSTATE_UINT32(syscfg_cmpcr, STM32F4xxSyscfgState), 146 VMSTATE_END_OF_LIST() 147 } 148 }; 149 150 static void stm32f4xx_syscfg_class_init(ObjectClass *klass, void *data) 151 { 152 DeviceClass *dc = DEVICE_CLASS(klass); 153 154 dc->reset = stm32f4xx_syscfg_reset; 155 dc->vmsd = &vmstate_stm32f4xx_syscfg; 156 } 157 158 static const TypeInfo stm32f4xx_syscfg_info = { 159 .name = TYPE_STM32F4XX_SYSCFG, 160 .parent = TYPE_SYS_BUS_DEVICE, 161 .instance_size = sizeof(STM32F4xxSyscfgState), 162 .instance_init = stm32f4xx_syscfg_init, 163 .class_init = stm32f4xx_syscfg_class_init, 164 }; 165 166 static void stm32f4xx_syscfg_register_types(void) 167 { 168 type_register_static(&stm32f4xx_syscfg_info); 169 } 170 171 type_init(stm32f4xx_syscfg_register_types)