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7c62aeb8 AB |
1 | /* |
2 | * Raspberry Pi emulation (c) 2012 Gregory Estrade | |
3 | * Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous | |
4 | * | |
5 | * Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft | |
6 | * Written by Andrew Baumann | |
7 | * | |
8 | * This code is licensed under the GNU GPLv2 and later. | |
9 | */ | |
10 | ||
11 | #include "hw/arm/bcm2835_peripherals.h" | |
12 | #include "hw/misc/bcm2835_mbox_defs.h" | |
13 | #include "hw/arm/raspi_platform.h" | |
14 | ||
15 | /* Peripheral base address on the VC (GPU) system bus */ | |
16 | #define BCM2835_VC_PERI_BASE 0x7e000000 | |
17 | ||
18 | /* Capabilities for SD controller: no DMA, high-speed, default clocks etc. */ | |
19 | #define BCM2835_SDHC_CAPAREG 0x52034b4 | |
20 | ||
21 | static void bcm2835_peripherals_init(Object *obj) | |
22 | { | |
23 | BCM2835PeripheralState *s = BCM2835_PERIPHERALS(obj); | |
24 | ||
25 | /* Memory region for peripheral devices, which we export to our parent */ | |
26 | memory_region_init(&s->peri_mr, obj,"bcm2835-peripherals", 0x1000000); | |
27 | object_property_add_child(obj, "peripheral-io", OBJECT(&s->peri_mr), NULL); | |
28 | sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_mr); | |
29 | ||
30 | /* Internal memory region for peripheral bus addresses (not exported) */ | |
31 | memory_region_init(&s->gpu_bus_mr, obj, "bcm2835-gpu", (uint64_t)1 << 32); | |
32 | object_property_add_child(obj, "gpu-bus", OBJECT(&s->gpu_bus_mr), NULL); | |
33 | ||
34 | /* Internal memory region for request/response communication with | |
35 | * mailbox-addressable peripherals (not exported) | |
36 | */ | |
37 | memory_region_init(&s->mbox_mr, obj, "bcm2835-mbox", | |
38 | MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT); | |
39 | ||
40 | /* Interrupt Controller */ | |
41 | object_initialize(&s->ic, sizeof(s->ic), TYPE_BCM2835_IC); | |
42 | object_property_add_child(obj, "ic", OBJECT(&s->ic), NULL); | |
43 | qdev_set_parent_bus(DEVICE(&s->ic), sysbus_get_default()); | |
44 | ||
45 | /* UART0 */ | |
46 | s->uart0 = SYS_BUS_DEVICE(object_new("pl011")); | |
47 | object_property_add_child(obj, "uart0", OBJECT(s->uart0), NULL); | |
48 | qdev_set_parent_bus(DEVICE(s->uart0), sysbus_get_default()); | |
49 | ||
50 | /* Mailboxes */ | |
51 | object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX); | |
52 | object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL); | |
53 | qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default()); | |
54 | ||
55 | object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr", | |
56 | OBJECT(&s->mbox_mr), &error_abort); | |
57 | ||
58 | /* Property channel */ | |
59 | object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY); | |
60 | object_property_add_child(obj, "property", OBJECT(&s->property), NULL); | |
f0afa731 SW |
61 | object_property_add_alias(obj, "board-rev", OBJECT(&s->property), |
62 | "board-rev", &error_abort); | |
7c62aeb8 AB |
63 | qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default()); |
64 | ||
65 | object_property_add_const_link(OBJECT(&s->property), "dma-mr", | |
66 | OBJECT(&s->gpu_bus_mr), &error_abort); | |
67 | ||
68 | /* Extended Mass Media Controller */ | |
69 | object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI); | |
70 | object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL); | |
71 | qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default()); | |
72 | } | |
73 | ||
74 | static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) | |
75 | { | |
76 | BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev); | |
77 | Object *obj; | |
78 | MemoryRegion *ram; | |
79 | Error *err = NULL; | |
80 | uint32_t ram_size; | |
81 | int n; | |
82 | ||
83 | obj = object_property_get_link(OBJECT(dev), "ram", &err); | |
84 | if (obj == NULL) { | |
85 | error_setg(errp, "%s: required ram link not found: %s", | |
86 | __func__, error_get_pretty(err)); | |
87 | return; | |
88 | } | |
89 | ||
90 | ram = MEMORY_REGION(obj); | |
91 | ram_size = memory_region_size(ram); | |
92 | ||
93 | /* Map peripherals and RAM into the GPU address space. */ | |
94 | memory_region_init_alias(&s->peri_mr_alias, OBJECT(s), | |
95 | "bcm2835-peripherals", &s->peri_mr, 0, | |
96 | memory_region_size(&s->peri_mr)); | |
97 | ||
98 | memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE, | |
99 | &s->peri_mr_alias, 1); | |
100 | ||
101 | /* RAM is aliased four times (different cache configurations) on the GPU */ | |
102 | for (n = 0; n < 4; n++) { | |
103 | memory_region_init_alias(&s->ram_alias[n], OBJECT(s), | |
104 | "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size); | |
105 | memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30, | |
106 | &s->ram_alias[n], 0); | |
107 | } | |
108 | ||
109 | /* Interrupt Controller */ | |
110 | object_property_set_bool(OBJECT(&s->ic), true, "realized", &err); | |
111 | if (err) { | |
112 | error_propagate(errp, err); | |
113 | return; | |
114 | } | |
115 | ||
116 | memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET, | |
117 | sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0)); | |
118 | sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic)); | |
119 | ||
120 | /* UART0 */ | |
121 | object_property_set_bool(OBJECT(s->uart0), true, "realized", &err); | |
122 | if (err) { | |
123 | error_propagate(errp, err); | |
124 | return; | |
125 | } | |
126 | ||
127 | memory_region_add_subregion(&s->peri_mr, UART0_OFFSET, | |
128 | sysbus_mmio_get_region(s->uart0, 0)); | |
129 | sysbus_connect_irq(s->uart0, 0, | |
130 | qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, | |
131 | INTERRUPT_UART)); | |
132 | ||
133 | /* Mailboxes */ | |
134 | object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err); | |
135 | if (err) { | |
136 | error_propagate(errp, err); | |
137 | return; | |
138 | } | |
139 | ||
140 | memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET, | |
141 | sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0)); | |
142 | sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0, | |
143 | qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ, | |
144 | INTERRUPT_ARM_MAILBOX)); | |
145 | ||
146 | /* Property channel */ | |
147 | object_property_set_int(OBJECT(&s->property), ram_size, "ram-size", &err); | |
148 | if (err) { | |
149 | error_propagate(errp, err); | |
150 | return; | |
151 | } | |
152 | ||
153 | object_property_set_bool(OBJECT(&s->property), true, "realized", &err); | |
154 | if (err) { | |
155 | error_propagate(errp, err); | |
156 | return; | |
157 | } | |
158 | ||
159 | memory_region_add_subregion(&s->mbox_mr, | |
160 | MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT, | |
161 | sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0)); | |
162 | sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0, | |
163 | qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY)); | |
164 | ||
165 | /* Extended Mass Media Controller */ | |
166 | object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg", | |
167 | &err); | |
168 | if (err) { | |
169 | error_propagate(errp, err); | |
170 | return; | |
171 | } | |
172 | ||
173 | object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err); | |
174 | if (err) { | |
175 | error_propagate(errp, err); | |
176 | return; | |
177 | } | |
178 | ||
179 | memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET, | |
180 | sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0)); | |
181 | sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0, | |
182 | qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, | |
183 | INTERRUPT_ARASANSDIO)); | |
184 | } | |
185 | ||
186 | static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data) | |
187 | { | |
188 | DeviceClass *dc = DEVICE_CLASS(oc); | |
189 | ||
190 | dc->realize = bcm2835_peripherals_realize; | |
191 | } | |
192 | ||
193 | static const TypeInfo bcm2835_peripherals_type_info = { | |
194 | .name = TYPE_BCM2835_PERIPHERALS, | |
195 | .parent = TYPE_SYS_BUS_DEVICE, | |
196 | .instance_size = sizeof(BCM2835PeripheralState), | |
197 | .instance_init = bcm2835_peripherals_init, | |
198 | .class_init = bcm2835_peripherals_class_init, | |
199 | }; | |
200 | ||
201 | static void bcm2835_peripherals_register_types(void) | |
202 | { | |
203 | type_register_static(&bcm2835_peripherals_type_info); | |
204 | } | |
205 | ||
206 | type_init(bcm2835_peripherals_register_types) |