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 0x52134b4 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 sysbus_init_child_obj(obj, "ic", &s->ic, sizeof(s->ic), TYPE_BCM2835_IC); 45 46 /* UART0 */ 47 sysbus_init_child_obj(obj, "uart0", &s->uart0, sizeof(s->uart0), 48 TYPE_PL011); 49 50 /* AUX / UART1 */ 51 sysbus_init_child_obj(obj, "aux", &s->aux, sizeof(s->aux), 52 TYPE_BCM2835_AUX); 53 54 /* Mailboxes */ 55 sysbus_init_child_obj(obj, "mbox", &s->mboxes, sizeof(s->mboxes), 56 TYPE_BCM2835_MBOX); 57 58 object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr", 59 OBJECT(&s->mbox_mr), &error_abort); 60 61 /* Framebuffer */ 62 sysbus_init_child_obj(obj, "fb", &s->fb, sizeof(s->fb), TYPE_BCM2835_FB); 63 object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size", 64 &error_abort); 65 66 object_property_add_const_link(OBJECT(&s->fb), "dma-mr", 67 OBJECT(&s->gpu_bus_mr), &error_abort); 68 69 /* Property channel */ 70 sysbus_init_child_obj(obj, "property", &s->property, sizeof(s->property), 71 TYPE_BCM2835_PROPERTY); 72 object_property_add_alias(obj, "board-rev", OBJECT(&s->property), 73 "board-rev", &error_abort); 74 75 object_property_add_const_link(OBJECT(&s->property), "fb", 76 OBJECT(&s->fb), &error_abort); 77 object_property_add_const_link(OBJECT(&s->property), "dma-mr", 78 OBJECT(&s->gpu_bus_mr), &error_abort); 79 80 /* Random Number Generator */ 81 sysbus_init_child_obj(obj, "rng", &s->rng, sizeof(s->rng), 82 TYPE_BCM2835_RNG); 83 84 /* Extended Mass Media Controller */ 85 sysbus_init_child_obj(obj, "sdhci", &s->sdhci, sizeof(s->sdhci), 86 TYPE_SYSBUS_SDHCI); 87 88 /* SDHOST */ 89 sysbus_init_child_obj(obj, "sdhost", &s->sdhost, sizeof(s->sdhost), 90 TYPE_BCM2835_SDHOST); 91 92 /* DMA Channels */ 93 sysbus_init_child_obj(obj, "dma", &s->dma, sizeof(s->dma), 94 TYPE_BCM2835_DMA); 95 96 object_property_add_const_link(OBJECT(&s->dma), "dma-mr", 97 OBJECT(&s->gpu_bus_mr), &error_abort); 98 99 /* GPIO */ 100 sysbus_init_child_obj(obj, "gpio", &s->gpio, sizeof(s->gpio), 101 TYPE_BCM2835_GPIO); 102 103 object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhci", 104 OBJECT(&s->sdhci.sdbus), &error_abort); 105 object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhost", 106 OBJECT(&s->sdhost.sdbus), &error_abort); 107 } 108 109 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) 110 { 111 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev); 112 Object *obj; 113 MemoryRegion *ram; 114 Error *err = NULL; 115 uint64_t ram_size, vcram_size; 116 int n; 117 118 obj = object_property_get_link(OBJECT(dev), "ram", &err); 119 if (obj == NULL) { 120 error_setg(errp, "%s: required ram link not found: %s", 121 __func__, error_get_pretty(err)); 122 return; 123 } 124 125 ram = MEMORY_REGION(obj); 126 ram_size = memory_region_size(ram); 127 128 /* Map peripherals and RAM into the GPU address space. */ 129 memory_region_init_alias(&s->peri_mr_alias, OBJECT(s), 130 "bcm2835-peripherals", &s->peri_mr, 0, 131 memory_region_size(&s->peri_mr)); 132 133 memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE, 134 &s->peri_mr_alias, 1); 135 136 /* RAM is aliased four times (different cache configurations) on the GPU */ 137 for (n = 0; n < 4; n++) { 138 memory_region_init_alias(&s->ram_alias[n], OBJECT(s), 139 "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size); 140 memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30, 141 &s->ram_alias[n], 0); 142 } 143 144 /* Interrupt Controller */ 145 object_property_set_bool(OBJECT(&s->ic), true, "realized", &err); 146 if (err) { 147 error_propagate(errp, err); 148 return; 149 } 150 151 memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET, 152 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0)); 153 sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic)); 154 155 /* UART0 */ 156 qdev_prop_set_chr(DEVICE(&s->uart0), "chardev", serial_hd(0)); 157 object_property_set_bool(OBJECT(&s->uart0), true, "realized", &err); 158 if (err) { 159 error_propagate(errp, err); 160 return; 161 } 162 163 memory_region_add_subregion(&s->peri_mr, UART0_OFFSET, 164 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->uart0), 0)); 165 sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart0), 0, 166 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 167 INTERRUPT_UART)); 168 /* AUX / UART1 */ 169 qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hd(1)); 170 171 object_property_set_bool(OBJECT(&s->aux), true, "realized", &err); 172 if (err) { 173 error_propagate(errp, err); 174 return; 175 } 176 177 memory_region_add_subregion(&s->peri_mr, UART1_OFFSET, 178 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0)); 179 sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0, 180 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 181 INTERRUPT_AUX)); 182 183 /* Mailboxes */ 184 object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err); 185 if (err) { 186 error_propagate(errp, err); 187 return; 188 } 189 190 memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET, 191 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0)); 192 sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0, 193 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ, 194 INTERRUPT_ARM_MAILBOX)); 195 196 /* Framebuffer */ 197 vcram_size = object_property_get_uint(OBJECT(s), "vcram-size", &err); 198 if (err) { 199 error_propagate(errp, err); 200 return; 201 } 202 203 object_property_set_uint(OBJECT(&s->fb), ram_size - vcram_size, 204 "vcram-base", &err); 205 if (err) { 206 error_propagate(errp, err); 207 return; 208 } 209 210 object_property_set_bool(OBJECT(&s->fb), true, "realized", &err); 211 if (err) { 212 error_propagate(errp, err); 213 return; 214 } 215 216 memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT, 217 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0)); 218 sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0, 219 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB)); 220 221 /* Property channel */ 222 object_property_set_bool(OBJECT(&s->property), true, "realized", &err); 223 if (err) { 224 error_propagate(errp, err); 225 return; 226 } 227 228 memory_region_add_subregion(&s->mbox_mr, 229 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT, 230 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0)); 231 sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0, 232 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY)); 233 234 /* Random Number Generator */ 235 object_property_set_bool(OBJECT(&s->rng), true, "realized", &err); 236 if (err) { 237 error_propagate(errp, err); 238 return; 239 } 240 241 memory_region_add_subregion(&s->peri_mr, RNG_OFFSET, 242 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng), 0)); 243 244 /* Extended Mass Media Controller 245 * 246 * Compatible with: 247 * - SD Host Controller Specification Version 3.0 Draft 1.0 248 * - SDIO Specification Version 3.0 249 * - MMC Specification Version 4.4 250 * 251 * For the exact details please refer to the Arasan documentation: 252 * SD3.0_Host_AHB_eMMC4.4_Usersguide_ver5.9_jan11_10.pdf 253 */ 254 object_property_set_uint(OBJECT(&s->sdhci), 3, "sd-spec-version", &err); 255 object_property_set_uint(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg", 256 &err); 257 object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk", 258 &err); 259 if (err) { 260 error_propagate(errp, err); 261 return; 262 } 263 264 object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err); 265 if (err) { 266 error_propagate(errp, err); 267 return; 268 } 269 270 memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET, 271 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0)); 272 sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0, 273 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 274 INTERRUPT_ARASANSDIO)); 275 276 /* SDHOST */ 277 object_property_set_bool(OBJECT(&s->sdhost), true, "realized", &err); 278 if (err) { 279 error_propagate(errp, err); 280 return; 281 } 282 283 memory_region_add_subregion(&s->peri_mr, MMCI0_OFFSET, 284 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhost), 0)); 285 sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhost), 0, 286 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 287 INTERRUPT_SDIO)); 288 289 /* DMA Channels */ 290 object_property_set_bool(OBJECT(&s->dma), true, "realized", &err); 291 if (err) { 292 error_propagate(errp, err); 293 return; 294 } 295 296 memory_region_add_subregion(&s->peri_mr, DMA_OFFSET, 297 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0)); 298 memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET, 299 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1)); 300 301 for (n = 0; n <= 12; n++) { 302 sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n, 303 qdev_get_gpio_in_named(DEVICE(&s->ic), 304 BCM2835_IC_GPU_IRQ, 305 INTERRUPT_DMA0 + n)); 306 } 307 308 /* GPIO */ 309 object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err); 310 if (err) { 311 error_propagate(errp, err); 312 return; 313 } 314 315 memory_region_add_subregion(&s->peri_mr, GPIO_OFFSET, 316 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gpio), 0)); 317 318 object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->gpio), "sd-bus", 319 &err); 320 if (err) { 321 error_propagate(errp, err); 322 return; 323 } 324 } 325 326 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data) 327 { 328 DeviceClass *dc = DEVICE_CLASS(oc); 329 330 dc->realize = bcm2835_peripherals_realize; 331 } 332 333 static const TypeInfo bcm2835_peripherals_type_info = { 334 .name = TYPE_BCM2835_PERIPHERALS, 335 .parent = TYPE_SYS_BUS_DEVICE, 336 .instance_size = sizeof(BCM2835PeripheralState), 337 .instance_init = bcm2835_peripherals_init, 338 .class_init = bcm2835_peripherals_class_init, 339 }; 340 341 static void bcm2835_peripherals_register_types(void) 342 { 343 type_register_static(&bcm2835_peripherals_type_info); 344 } 345 346 type_init(bcm2835_peripherals_register_types) 347