]>
Commit | Line | Data |
---|---|---|
e64d8c83 AF |
1 | /* |
2 | * STM32F4XX EXTI | |
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_exti.h" | |
31 | ||
32 | static void stm32f4xx_exti_reset(DeviceState *dev) | |
33 | { | |
34 | STM32F4xxExtiState *s = STM32F4XX_EXTI(dev); | |
35 | ||
36 | s->exti_imr = 0x00000000; | |
37 | s->exti_emr = 0x00000000; | |
38 | s->exti_rtsr = 0x00000000; | |
39 | s->exti_ftsr = 0x00000000; | |
40 | s->exti_swier = 0x00000000; | |
41 | s->exti_pr = 0x00000000; | |
42 | } | |
43 | ||
44 | static void stm32f4xx_exti_set_irq(void *opaque, int irq, int level) | |
45 | { | |
46 | STM32F4xxExtiState *s = opaque; | |
47 | ||
48 | trace_stm32f4xx_exti_set_irq(irq, level); | |
49 | ||
50 | if (((1 << irq) & s->exti_rtsr) && level) { | |
51 | /* Rising Edge */ | |
52 | s->exti_pr |= 1 << irq; | |
53 | } | |
54 | ||
55 | if (((1 << irq) & s->exti_ftsr) && !level) { | |
56 | /* Falling Edge */ | |
57 | s->exti_pr |= 1 << irq; | |
58 | } | |
59 | ||
60 | if (!((1 << irq) & s->exti_imr)) { | |
61 | /* Interrupt is masked */ | |
62 | return; | |
63 | } | |
64 | qemu_irq_pulse(s->irq[irq]); | |
65 | } | |
66 | ||
67 | static uint64_t stm32f4xx_exti_read(void *opaque, hwaddr addr, | |
68 | unsigned int size) | |
69 | { | |
70 | STM32F4xxExtiState *s = opaque; | |
71 | ||
72 | trace_stm32f4xx_exti_read(addr); | |
73 | ||
74 | switch (addr) { | |
75 | case EXTI_IMR: | |
76 | return s->exti_imr; | |
77 | case EXTI_EMR: | |
78 | return s->exti_emr; | |
79 | case EXTI_RTSR: | |
80 | return s->exti_rtsr; | |
81 | case EXTI_FTSR: | |
82 | return s->exti_ftsr; | |
83 | case EXTI_SWIER: | |
84 | return s->exti_swier; | |
85 | case EXTI_PR: | |
86 | return s->exti_pr; | |
87 | default: | |
88 | qemu_log_mask(LOG_GUEST_ERROR, | |
89 | "STM32F4XX_exti_read: Bad offset %x\n", (int)addr); | |
90 | return 0; | |
91 | } | |
92 | return 0; | |
93 | } | |
94 | ||
95 | static void stm32f4xx_exti_write(void *opaque, hwaddr addr, | |
96 | uint64_t val64, unsigned int size) | |
97 | { | |
98 | STM32F4xxExtiState *s = opaque; | |
99 | uint32_t value = (uint32_t) val64; | |
100 | ||
101 | trace_stm32f4xx_exti_write(addr, value); | |
102 | ||
103 | switch (addr) { | |
104 | case EXTI_IMR: | |
105 | s->exti_imr = value; | |
106 | return; | |
107 | case EXTI_EMR: | |
108 | s->exti_emr = value; | |
109 | return; | |
110 | case EXTI_RTSR: | |
111 | s->exti_rtsr = value; | |
112 | return; | |
113 | case EXTI_FTSR: | |
114 | s->exti_ftsr = value; | |
115 | return; | |
116 | case EXTI_SWIER: | |
117 | s->exti_swier = value; | |
118 | return; | |
119 | case EXTI_PR: | |
120 | /* This bit is cleared by writing a 1 to it */ | |
121 | s->exti_pr &= ~value; | |
122 | return; | |
123 | default: | |
124 | qemu_log_mask(LOG_GUEST_ERROR, | |
125 | "STM32F4XX_exti_write: Bad offset %x\n", (int)addr); | |
126 | } | |
127 | } | |
128 | ||
129 | static const MemoryRegionOps stm32f4xx_exti_ops = { | |
130 | .read = stm32f4xx_exti_read, | |
131 | .write = stm32f4xx_exti_write, | |
132 | .endianness = DEVICE_NATIVE_ENDIAN, | |
133 | }; | |
134 | ||
135 | static void stm32f4xx_exti_init(Object *obj) | |
136 | { | |
137 | STM32F4xxExtiState *s = STM32F4XX_EXTI(obj); | |
138 | int i; | |
139 | ||
140 | for (i = 0; i < NUM_INTERRUPT_OUT_LINES; i++) { | |
141 | sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq[i]); | |
142 | } | |
143 | ||
144 | memory_region_init_io(&s->mmio, obj, &stm32f4xx_exti_ops, s, | |
145 | TYPE_STM32F4XX_EXTI, 0x400); | |
146 | sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio); | |
147 | ||
148 | qdev_init_gpio_in(DEVICE(obj), stm32f4xx_exti_set_irq, | |
149 | NUM_GPIO_EVENT_IN_LINES); | |
150 | } | |
151 | ||
152 | static const VMStateDescription vmstate_stm32f4xx_exti = { | |
153 | .name = TYPE_STM32F4XX_EXTI, | |
154 | .version_id = 1, | |
155 | .minimum_version_id = 1, | |
156 | .fields = (VMStateField[]) { | |
157 | VMSTATE_UINT32(exti_imr, STM32F4xxExtiState), | |
158 | VMSTATE_UINT32(exti_emr, STM32F4xxExtiState), | |
159 | VMSTATE_UINT32(exti_rtsr, STM32F4xxExtiState), | |
160 | VMSTATE_UINT32(exti_ftsr, STM32F4xxExtiState), | |
161 | VMSTATE_UINT32(exti_swier, STM32F4xxExtiState), | |
162 | VMSTATE_UINT32(exti_pr, STM32F4xxExtiState), | |
163 | VMSTATE_END_OF_LIST() | |
164 | } | |
165 | }; | |
166 | ||
167 | static void stm32f4xx_exti_class_init(ObjectClass *klass, void *data) | |
168 | { | |
169 | DeviceClass *dc = DEVICE_CLASS(klass); | |
170 | ||
171 | dc->reset = stm32f4xx_exti_reset; | |
172 | dc->vmsd = &vmstate_stm32f4xx_exti; | |
173 | } | |
174 | ||
175 | static const TypeInfo stm32f4xx_exti_info = { | |
176 | .name = TYPE_STM32F4XX_EXTI, | |
177 | .parent = TYPE_SYS_BUS_DEVICE, | |
178 | .instance_size = sizeof(STM32F4xxExtiState), | |
179 | .instance_init = stm32f4xx_exti_init, | |
180 | .class_init = stm32f4xx_exti_class_init, | |
181 | }; | |
182 | ||
183 | static void stm32f4xx_exti_register_types(void) | |
184 | { | |
185 | type_register_static(&stm32f4xx_exti_info); | |
186 | } | |
187 | ||
188 | type_init(stm32f4xx_exti_register_types) |