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 "qapi/error.h" 13 #include "hw/arm/bcm2835_peripherals.h" 14 #include "hw/misc/bcm2835_mbox_defs.h" 15 #include "hw/arm/raspi_platform.h" 16 #include "sysemu/sysemu.h" 17 18 /* Peripheral base address on the VC (GPU) system bus */ 19 #define BCM2835_VC_PERI_BASE 0x7e000000 20 21 /* Capabilities for SD controller: no DMA, high-speed, default clocks etc. */ 22 #define BCM2835_SDHC_CAPAREG 0x52034b4 23 24 static void bcm2835_peripherals_init(Object *obj) 25 { 26 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(obj); 27 28 /* Memory region for peripheral devices, which we export to our parent */ 29 memory_region_init(&s->peri_mr, obj,"bcm2835-peripherals", 0x1000000); 30 object_property_add_child(obj, "peripheral-io", OBJECT(&s->peri_mr), NULL); 31 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_mr); 32 33 /* Internal memory region for peripheral bus addresses (not exported) */ 34 memory_region_init(&s->gpu_bus_mr, obj, "bcm2835-gpu", (uint64_t)1 << 32); 35 object_property_add_child(obj, "gpu-bus", OBJECT(&s->gpu_bus_mr), NULL); 36 37 /* Internal memory region for request/response communication with 38 * mailbox-addressable peripherals (not exported) 39 */ 40 memory_region_init(&s->mbox_mr, obj, "bcm2835-mbox", 41 MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT); 42 43 /* Interrupt Controller */ 44 object_initialize(&s->ic, sizeof(s->ic), TYPE_BCM2835_IC); 45 object_property_add_child(obj, "ic", OBJECT(&s->ic), NULL); 46 qdev_set_parent_bus(DEVICE(&s->ic), sysbus_get_default()); 47 48 /* UART0 */ 49 s->uart0 = SYS_BUS_DEVICE(object_new("pl011")); 50 object_property_add_child(obj, "uart0", OBJECT(s->uart0), NULL); 51 qdev_set_parent_bus(DEVICE(s->uart0), sysbus_get_default()); 52 53 /* AUX / UART1 */ 54 object_initialize(&s->aux, sizeof(s->aux), TYPE_BCM2835_AUX); 55 object_property_add_child(obj, "aux", OBJECT(&s->aux), NULL); 56 qdev_set_parent_bus(DEVICE(&s->aux), sysbus_get_default()); 57 58 /* Mailboxes */ 59 object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX); 60 object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL); 61 qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default()); 62 63 object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr", 64 OBJECT(&s->mbox_mr), &error_abort); 65 66 /* Framebuffer */ 67 object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB); 68 object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL); 69 object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size", 70 &error_abort); 71 qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default()); 72 73 object_property_add_const_link(OBJECT(&s->fb), "dma-mr", 74 OBJECT(&s->gpu_bus_mr), &error_abort); 75 76 /* Property channel */ 77 object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY); 78 object_property_add_child(obj, "property", OBJECT(&s->property), NULL); 79 object_property_add_alias(obj, "board-rev", OBJECT(&s->property), 80 "board-rev", &error_abort); 81 qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default()); 82 83 object_property_add_const_link(OBJECT(&s->property), "fb", 84 OBJECT(&s->fb), &error_abort); 85 object_property_add_const_link(OBJECT(&s->property), "dma-mr", 86 OBJECT(&s->gpu_bus_mr), &error_abort); 87 88 /* Random Number Generator */ 89 object_initialize(&s->rng, sizeof(s->rng), TYPE_BCM2835_RNG); 90 object_property_add_child(obj, "rng", OBJECT(&s->rng), NULL); 91 qdev_set_parent_bus(DEVICE(&s->rng), sysbus_get_default()); 92 93 /* Extended Mass Media Controller */ 94 object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI); 95 object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL); 96 qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default()); 97 98 /* SDHOST */ 99 object_initialize(&s->sdhost, sizeof(s->sdhost), TYPE_BCM2835_SDHOST); 100 object_property_add_child(obj, "sdhost", OBJECT(&s->sdhost), NULL); 101 qdev_set_parent_bus(DEVICE(&s->sdhost), sysbus_get_default()); 102 103 /* DMA Channels */ 104 object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA); 105 object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL); 106 qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default()); 107 108 object_property_add_const_link(OBJECT(&s->dma), "dma-mr", 109 OBJECT(&s->gpu_bus_mr), &error_abort); 110 111 /* GPIO */ 112 object_initialize(&s->gpio, sizeof(s->gpio), TYPE_BCM2835_GPIO); 113 object_property_add_child(obj, "gpio", OBJECT(&s->gpio), NULL); 114 qdev_set_parent_bus(DEVICE(&s->gpio), sysbus_get_default()); 115 116 object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhci", 117 OBJECT(&s->sdhci.sdbus), &error_abort); 118 object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhost", 119 OBJECT(&s->sdhost.sdbus), &error_abort); 120 } 121 122 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) 123 { 124 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev); 125 Object *obj; 126 MemoryRegion *ram; 127 Error *err = NULL; 128 uint64_t ram_size, vcram_size; 129 int n; 130 131 obj = object_property_get_link(OBJECT(dev), "ram", &err); 132 if (obj == NULL) { 133 error_setg(errp, "%s: required ram link not found: %s", 134 __func__, error_get_pretty(err)); 135 return; 136 } 137 138 ram = MEMORY_REGION(obj); 139 ram_size = memory_region_size(ram); 140 141 /* Map peripherals and RAM into the GPU address space. */ 142 memory_region_init_alias(&s->peri_mr_alias, OBJECT(s), 143 "bcm2835-peripherals", &s->peri_mr, 0, 144 memory_region_size(&s->peri_mr)); 145 146 memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE, 147 &s->peri_mr_alias, 1); 148 149 /* RAM is aliased four times (different cache configurations) on the GPU */ 150 for (n = 0; n < 4; n++) { 151 memory_region_init_alias(&s->ram_alias[n], OBJECT(s), 152 "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size); 153 memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30, 154 &s->ram_alias[n], 0); 155 } 156 157 /* Interrupt Controller */ 158 object_property_set_bool(OBJECT(&s->ic), true, "realized", &err); 159 if (err) { 160 error_propagate(errp, err); 161 return; 162 } 163 164 memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET, 165 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0)); 166 sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic)); 167 168 /* UART0 */ 169 qdev_prop_set_chr(DEVICE(s->uart0), "chardev", serial_hds[0]); 170 object_property_set_bool(OBJECT(s->uart0), true, "realized", &err); 171 if (err) { 172 error_propagate(errp, err); 173 return; 174 } 175 176 memory_region_add_subregion(&s->peri_mr, UART0_OFFSET, 177 sysbus_mmio_get_region(s->uart0, 0)); 178 sysbus_connect_irq(s->uart0, 0, 179 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 180 INTERRUPT_UART)); 181 /* AUX / UART1 */ 182 qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hds[1]); 183 184 object_property_set_bool(OBJECT(&s->aux), true, "realized", &err); 185 if (err) { 186 error_propagate(errp, err); 187 return; 188 } 189 190 memory_region_add_subregion(&s->peri_mr, UART1_OFFSET, 191 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0)); 192 sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0, 193 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 194 INTERRUPT_AUX)); 195 196 /* Mailboxes */ 197 object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err); 198 if (err) { 199 error_propagate(errp, err); 200 return; 201 } 202 203 memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET, 204 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0)); 205 sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0, 206 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ, 207 INTERRUPT_ARM_MAILBOX)); 208 209 /* Framebuffer */ 210 vcram_size = object_property_get_uint(OBJECT(s), "vcram-size", &err); 211 if (err) { 212 error_propagate(errp, err); 213 return; 214 } 215 216 object_property_set_uint(OBJECT(&s->fb), ram_size - vcram_size, 217 "vcram-base", &err); 218 if (err) { 219 error_propagate(errp, err); 220 return; 221 } 222 223 object_property_set_bool(OBJECT(&s->fb), true, "realized", &err); 224 if (err) { 225 error_propagate(errp, err); 226 return; 227 } 228 229 memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT, 230 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0)); 231 sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0, 232 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB)); 233 234 /* Property channel */ 235 object_property_set_bool(OBJECT(&s->property), true, "realized", &err); 236 if (err) { 237 error_propagate(errp, err); 238 return; 239 } 240 241 memory_region_add_subregion(&s->mbox_mr, 242 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT, 243 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0)); 244 sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0, 245 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY)); 246 247 /* Random Number Generator */ 248 object_property_set_bool(OBJECT(&s->rng), true, "realized", &err); 249 if (err) { 250 error_propagate(errp, err); 251 return; 252 } 253 254 memory_region_add_subregion(&s->peri_mr, RNG_OFFSET, 255 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng), 0)); 256 257 /* Extended Mass Media Controller */ 258 object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg", 259 &err); 260 if (err) { 261 error_propagate(errp, err); 262 return; 263 } 264 265 object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk", 266 &err); 267 if (err) { 268 error_propagate(errp, err); 269 return; 270 } 271 272 object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err); 273 if (err) { 274 error_propagate(errp, err); 275 return; 276 } 277 278 memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET, 279 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0)); 280 sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0, 281 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 282 INTERRUPT_ARASANSDIO)); 283 284 /* SDHOST */ 285 object_property_set_bool(OBJECT(&s->sdhost), true, "realized", &err); 286 if (err) { 287 error_propagate(errp, err); 288 return; 289 } 290 291 memory_region_add_subregion(&s->peri_mr, MMCI0_OFFSET, 292 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhost), 0)); 293 sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhost), 0, 294 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 295 INTERRUPT_SDIO)); 296 297 /* DMA Channels */ 298 object_property_set_bool(OBJECT(&s->dma), true, "realized", &err); 299 if (err) { 300 error_propagate(errp, err); 301 return; 302 } 303 304 memory_region_add_subregion(&s->peri_mr, DMA_OFFSET, 305 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0)); 306 memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET, 307 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1)); 308 309 for (n = 0; n <= 12; n++) { 310 sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n, 311 qdev_get_gpio_in_named(DEVICE(&s->ic), 312 BCM2835_IC_GPU_IRQ, 313 INTERRUPT_DMA0 + n)); 314 } 315 316 /* GPIO */ 317 object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err); 318 if (err) { 319 error_propagate(errp, err); 320 return; 321 } 322 323 memory_region_add_subregion(&s->peri_mr, GPIO_OFFSET, 324 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gpio), 0)); 325 326 object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->gpio), "sd-bus", 327 &err); 328 if (err) { 329 error_propagate(errp, err); 330 return; 331 } 332 } 333 334 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data) 335 { 336 DeviceClass *dc = DEVICE_CLASS(oc); 337 338 dc->realize = bcm2835_peripherals_realize; 339 } 340 341 static const TypeInfo bcm2835_peripherals_type_info = { 342 .name = TYPE_BCM2835_PERIPHERALS, 343 .parent = TYPE_SYS_BUS_DEVICE, 344 .instance_size = sizeof(BCM2835PeripheralState), 345 .instance_init = bcm2835_peripherals_init, 346 .class_init = bcm2835_peripherals_class_init, 347 }; 348 349 static void bcm2835_peripherals_register_types(void) 350 { 351 type_register_static(&bcm2835_peripherals_type_info); 352 } 353 354 type_init(bcm2835_peripherals_register_types) 355