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 "qemu/osdep.h" 12 #include "hw/arm/bcm2835_peripherals.h" 13 #include "hw/misc/bcm2835_mbox_defs.h" 14 #include "hw/arm/raspi_platform.h" 15 #include "sysemu/char.h" 16 17 /* Peripheral base address on the VC (GPU) system bus */ 18 #define BCM2835_VC_PERI_BASE 0x7e000000 19 20 /* Capabilities for SD controller: no DMA, high-speed, default clocks etc. */ 21 #define BCM2835_SDHC_CAPAREG 0x52034b4 22 23 static void bcm2835_peripherals_init(Object *obj) 24 { 25 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(obj); 26 27 /* Memory region for peripheral devices, which we export to our parent */ 28 memory_region_init(&s->peri_mr, obj,"bcm2835-peripherals", 0x1000000); 29 object_property_add_child(obj, "peripheral-io", OBJECT(&s->peri_mr), NULL); 30 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_mr); 31 32 /* Internal memory region for peripheral bus addresses (not exported) */ 33 memory_region_init(&s->gpu_bus_mr, obj, "bcm2835-gpu", (uint64_t)1 << 32); 34 object_property_add_child(obj, "gpu-bus", OBJECT(&s->gpu_bus_mr), NULL); 35 36 /* Internal memory region for request/response communication with 37 * mailbox-addressable peripherals (not exported) 38 */ 39 memory_region_init(&s->mbox_mr, obj, "bcm2835-mbox", 40 MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT); 41 42 /* Interrupt Controller */ 43 object_initialize(&s->ic, sizeof(s->ic), TYPE_BCM2835_IC); 44 object_property_add_child(obj, "ic", OBJECT(&s->ic), NULL); 45 qdev_set_parent_bus(DEVICE(&s->ic), sysbus_get_default()); 46 47 /* UART0 */ 48 s->uart0 = SYS_BUS_DEVICE(object_new("pl011")); 49 object_property_add_child(obj, "uart0", OBJECT(s->uart0), NULL); 50 qdev_set_parent_bus(DEVICE(s->uart0), sysbus_get_default()); 51 52 /* AUX / UART1 */ 53 object_initialize(&s->aux, sizeof(s->aux), TYPE_BCM2835_AUX); 54 object_property_add_child(obj, "aux", OBJECT(&s->aux), NULL); 55 qdev_set_parent_bus(DEVICE(&s->aux), sysbus_get_default()); 56 57 /* Mailboxes */ 58 object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX); 59 object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL); 60 qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default()); 61 62 object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr", 63 OBJECT(&s->mbox_mr), &error_abort); 64 65 /* Framebuffer */ 66 object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB); 67 object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL); 68 object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size", 69 &error_abort); 70 qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default()); 71 72 object_property_add_const_link(OBJECT(&s->fb), "dma-mr", 73 OBJECT(&s->gpu_bus_mr), &error_abort); 74 75 /* Property channel */ 76 object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY); 77 object_property_add_child(obj, "property", OBJECT(&s->property), NULL); 78 object_property_add_alias(obj, "board-rev", OBJECT(&s->property), 79 "board-rev", &error_abort); 80 qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default()); 81 82 object_property_add_const_link(OBJECT(&s->property), "fb", 83 OBJECT(&s->fb), &error_abort); 84 object_property_add_const_link(OBJECT(&s->property), "dma-mr", 85 OBJECT(&s->gpu_bus_mr), &error_abort); 86 87 /* Extended Mass Media Controller */ 88 object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI); 89 object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL); 90 qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default()); 91 92 /* DMA Channels */ 93 object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA); 94 object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL); 95 qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default()); 96 97 object_property_add_const_link(OBJECT(&s->dma), "dma-mr", 98 OBJECT(&s->gpu_bus_mr), &error_abort); 99 } 100 101 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) 102 { 103 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev); 104 Object *obj; 105 MemoryRegion *ram; 106 Error *err = NULL; 107 uint32_t ram_size, vcram_size; 108 CharDriverState *chr; 109 int n; 110 111 obj = object_property_get_link(OBJECT(dev), "ram", &err); 112 if (obj == NULL) { 113 error_setg(errp, "%s: required ram link not found: %s", 114 __func__, error_get_pretty(err)); 115 return; 116 } 117 118 ram = MEMORY_REGION(obj); 119 ram_size = memory_region_size(ram); 120 121 /* Map peripherals and RAM into the GPU address space. */ 122 memory_region_init_alias(&s->peri_mr_alias, OBJECT(s), 123 "bcm2835-peripherals", &s->peri_mr, 0, 124 memory_region_size(&s->peri_mr)); 125 126 memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE, 127 &s->peri_mr_alias, 1); 128 129 /* RAM is aliased four times (different cache configurations) on the GPU */ 130 for (n = 0; n < 4; n++) { 131 memory_region_init_alias(&s->ram_alias[n], OBJECT(s), 132 "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size); 133 memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30, 134 &s->ram_alias[n], 0); 135 } 136 137 /* Interrupt Controller */ 138 object_property_set_bool(OBJECT(&s->ic), true, "realized", &err); 139 if (err) { 140 error_propagate(errp, err); 141 return; 142 } 143 144 memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET, 145 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0)); 146 sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic)); 147 148 /* UART0 */ 149 object_property_set_bool(OBJECT(s->uart0), true, "realized", &err); 150 if (err) { 151 error_propagate(errp, err); 152 return; 153 } 154 155 memory_region_add_subregion(&s->peri_mr, UART0_OFFSET, 156 sysbus_mmio_get_region(s->uart0, 0)); 157 sysbus_connect_irq(s->uart0, 0, 158 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 159 INTERRUPT_UART)); 160 161 /* AUX / UART1 */ 162 /* TODO: don't call qemu_char_get_next_serial() here, instead set 163 * chardev properties for each uart at the board level, once pl011 164 * (uart0) has been updated to avoid qemu_char_get_next_serial() 165 */ 166 chr = qemu_char_get_next_serial(); 167 if (chr == NULL) { 168 chr = qemu_chr_new("bcm2835.uart1", "null", NULL); 169 } 170 qdev_prop_set_chr(DEVICE(&s->aux), "chardev", chr); 171 172 object_property_set_bool(OBJECT(&s->aux), true, "realized", &err); 173 if (err) { 174 error_propagate(errp, err); 175 return; 176 } 177 178 memory_region_add_subregion(&s->peri_mr, UART1_OFFSET, 179 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0)); 180 sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0, 181 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 182 INTERRUPT_AUX)); 183 184 /* Mailboxes */ 185 object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err); 186 if (err) { 187 error_propagate(errp, err); 188 return; 189 } 190 191 memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET, 192 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0)); 193 sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0, 194 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ, 195 INTERRUPT_ARM_MAILBOX)); 196 197 /* Framebuffer */ 198 vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size", 199 &err); 200 if (err) { 201 error_propagate(errp, err); 202 return; 203 } 204 205 object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size, 206 "vcram-base", &err); 207 if (err) { 208 error_propagate(errp, err); 209 return; 210 } 211 212 object_property_set_bool(OBJECT(&s->fb), true, "realized", &err); 213 if (err) { 214 error_propagate(errp, err); 215 return; 216 } 217 218 memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT, 219 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0)); 220 sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0, 221 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB)); 222 223 /* Property channel */ 224 object_property_set_bool(OBJECT(&s->property), true, "realized", &err); 225 if (err) { 226 error_propagate(errp, err); 227 return; 228 } 229 230 memory_region_add_subregion(&s->mbox_mr, 231 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT, 232 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0)); 233 sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0, 234 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY)); 235 236 /* Extended Mass Media Controller */ 237 object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg", 238 &err); 239 if (err) { 240 error_propagate(errp, err); 241 return; 242 } 243 244 object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk", 245 &err); 246 if (err) { 247 error_propagate(errp, err); 248 return; 249 } 250 251 object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err); 252 if (err) { 253 error_propagate(errp, err); 254 return; 255 } 256 257 memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET, 258 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0)); 259 sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0, 260 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 261 INTERRUPT_ARASANSDIO)); 262 object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->sdhci), "sd-bus", 263 &err); 264 if (err) { 265 error_propagate(errp, err); 266 return; 267 } 268 269 /* DMA Channels */ 270 object_property_set_bool(OBJECT(&s->dma), true, "realized", &err); 271 if (err) { 272 error_propagate(errp, err); 273 return; 274 } 275 276 memory_region_add_subregion(&s->peri_mr, DMA_OFFSET, 277 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0)); 278 memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET, 279 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1)); 280 281 for (n = 0; n <= 12; n++) { 282 sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n, 283 qdev_get_gpio_in_named(DEVICE(&s->ic), 284 BCM2835_IC_GPU_IRQ, 285 INTERRUPT_DMA0 + n)); 286 } 287 } 288 289 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data) 290 { 291 DeviceClass *dc = DEVICE_CLASS(oc); 292 293 dc->realize = bcm2835_peripherals_realize; 294 /* Reason: realize() method uses qemu_char_get_next_serial() */ 295 dc->cannot_instantiate_with_device_add_yet = true; 296 } 297 298 static const TypeInfo bcm2835_peripherals_type_info = { 299 .name = TYPE_BCM2835_PERIPHERALS, 300 .parent = TYPE_SYS_BUS_DEVICE, 301 .instance_size = sizeof(BCM2835PeripheralState), 302 .instance_init = bcm2835_peripherals_init, 303 .class_init = bcm2835_peripherals_class_init, 304 }; 305 306 static void bcm2835_peripherals_register_types(void) 307 { 308 type_register_static(&bcm2835_peripherals_type_info); 309 } 310 311 type_init(bcm2835_peripherals_register_types) 312