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 "qemu/module.h" 14 #include "hw/arm/bcm2835_peripherals.h" 15 #include "hw/misc/bcm2835_mbox_defs.h" 16 #include "hw/arm/raspi_platform.h" 17 #include "sysemu/sysemu.h" 18 19 /* Peripheral base address on the VC (GPU) system bus */ 20 #define BCM2835_VC_PERI_BASE 0x7e000000 21 22 /* Capabilities for SD controller: no DMA, high-speed, default clocks etc. */ 23 #define BCM2835_SDHC_CAPAREG 0x52134b4 24 25 static void bcm2835_peripherals_init(Object *obj) 26 { 27 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(obj); 28 29 /* Memory region for peripheral devices, which we export to our parent */ 30 memory_region_init(&s->peri_mr, obj,"bcm2835-peripherals", 0x1000000); 31 object_property_add_child(obj, "peripheral-io", OBJECT(&s->peri_mr), NULL); 32 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_mr); 33 34 /* Internal memory region for peripheral bus addresses (not exported) */ 35 memory_region_init(&s->gpu_bus_mr, obj, "bcm2835-gpu", (uint64_t)1 << 32); 36 object_property_add_child(obj, "gpu-bus", OBJECT(&s->gpu_bus_mr), NULL); 37 38 /* Internal memory region for request/response communication with 39 * mailbox-addressable peripherals (not exported) 40 */ 41 memory_region_init(&s->mbox_mr, obj, "bcm2835-mbox", 42 MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT); 43 44 /* Interrupt Controller */ 45 sysbus_init_child_obj(obj, "ic", &s->ic, sizeof(s->ic), TYPE_BCM2835_IC); 46 47 /* UART0 */ 48 sysbus_init_child_obj(obj, "uart0", &s->uart0, sizeof(s->uart0), 49 TYPE_PL011); 50 51 /* AUX / UART1 */ 52 sysbus_init_child_obj(obj, "aux", &s->aux, sizeof(s->aux), 53 TYPE_BCM2835_AUX); 54 55 /* Mailboxes */ 56 sysbus_init_child_obj(obj, "mbox", &s->mboxes, sizeof(s->mboxes), 57 TYPE_BCM2835_MBOX); 58 59 object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr", 60 OBJECT(&s->mbox_mr), &error_abort); 61 62 /* Framebuffer */ 63 sysbus_init_child_obj(obj, "fb", &s->fb, sizeof(s->fb), TYPE_BCM2835_FB); 64 object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size", 65 &error_abort); 66 67 object_property_add_const_link(OBJECT(&s->fb), "dma-mr", 68 OBJECT(&s->gpu_bus_mr), &error_abort); 69 70 /* Property channel */ 71 sysbus_init_child_obj(obj, "property", &s->property, sizeof(s->property), 72 TYPE_BCM2835_PROPERTY); 73 object_property_add_alias(obj, "board-rev", OBJECT(&s->property), 74 "board-rev", &error_abort); 75 76 object_property_add_const_link(OBJECT(&s->property), "fb", 77 OBJECT(&s->fb), &error_abort); 78 object_property_add_const_link(OBJECT(&s->property), "dma-mr", 79 OBJECT(&s->gpu_bus_mr), &error_abort); 80 81 /* Random Number Generator */ 82 sysbus_init_child_obj(obj, "rng", &s->rng, sizeof(s->rng), 83 TYPE_BCM2835_RNG); 84 85 /* Extended Mass Media Controller */ 86 sysbus_init_child_obj(obj, "sdhci", &s->sdhci, sizeof(s->sdhci), 87 TYPE_SYSBUS_SDHCI); 88 89 /* SDHOST */ 90 sysbus_init_child_obj(obj, "sdhost", &s->sdhost, sizeof(s->sdhost), 91 TYPE_BCM2835_SDHOST); 92 93 /* DMA Channels */ 94 sysbus_init_child_obj(obj, "dma", &s->dma, sizeof(s->dma), 95 TYPE_BCM2835_DMA); 96 97 object_property_add_const_link(OBJECT(&s->dma), "dma-mr", 98 OBJECT(&s->gpu_bus_mr), &error_abort); 99 100 /* GPIO */ 101 sysbus_init_child_obj(obj, "gpio", &s->gpio, sizeof(s->gpio), 102 TYPE_BCM2835_GPIO); 103 104 object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhci", 105 OBJECT(&s->sdhci.sdbus), &error_abort); 106 object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhost", 107 OBJECT(&s->sdhost.sdbus), &error_abort); 108 } 109 110 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) 111 { 112 BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev); 113 Object *obj; 114 MemoryRegion *ram; 115 Error *err = NULL; 116 uint64_t ram_size, vcram_size; 117 int n; 118 119 obj = object_property_get_link(OBJECT(dev), "ram", &err); 120 if (obj == NULL) { 121 error_setg(errp, "%s: required ram link not found: %s", 122 __func__, error_get_pretty(err)); 123 return; 124 } 125 126 ram = MEMORY_REGION(obj); 127 ram_size = memory_region_size(ram); 128 129 /* Map peripherals and RAM into the GPU address space. */ 130 memory_region_init_alias(&s->peri_mr_alias, OBJECT(s), 131 "bcm2835-peripherals", &s->peri_mr, 0, 132 memory_region_size(&s->peri_mr)); 133 134 memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE, 135 &s->peri_mr_alias, 1); 136 137 /* RAM is aliased four times (different cache configurations) on the GPU */ 138 for (n = 0; n < 4; n++) { 139 memory_region_init_alias(&s->ram_alias[n], OBJECT(s), 140 "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size); 141 memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30, 142 &s->ram_alias[n], 0); 143 } 144 145 /* Interrupt Controller */ 146 object_property_set_bool(OBJECT(&s->ic), true, "realized", &err); 147 if (err) { 148 error_propagate(errp, err); 149 return; 150 } 151 152 memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET, 153 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0)); 154 sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic)); 155 156 /* UART0 */ 157 qdev_prop_set_chr(DEVICE(&s->uart0), "chardev", serial_hd(0)); 158 object_property_set_bool(OBJECT(&s->uart0), true, "realized", &err); 159 if (err) { 160 error_propagate(errp, err); 161 return; 162 } 163 164 memory_region_add_subregion(&s->peri_mr, UART0_OFFSET, 165 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->uart0), 0)); 166 sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart0), 0, 167 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 168 INTERRUPT_UART)); 169 /* AUX / UART1 */ 170 qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hd(1)); 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 = object_property_get_uint(OBJECT(s), "vcram-size", &err); 199 if (err) { 200 error_propagate(errp, err); 201 return; 202 } 203 204 object_property_set_uint(OBJECT(&s->fb), ram_size - vcram_size, 205 "vcram-base", &err); 206 if (err) { 207 error_propagate(errp, err); 208 return; 209 } 210 211 object_property_set_bool(OBJECT(&s->fb), true, "realized", &err); 212 if (err) { 213 error_propagate(errp, err); 214 return; 215 } 216 217 memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT, 218 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0)); 219 sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0, 220 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB)); 221 222 /* Property channel */ 223 object_property_set_bool(OBJECT(&s->property), true, "realized", &err); 224 if (err) { 225 error_propagate(errp, err); 226 return; 227 } 228 229 memory_region_add_subregion(&s->mbox_mr, 230 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT, 231 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0)); 232 sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0, 233 qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY)); 234 235 /* Random Number Generator */ 236 object_property_set_bool(OBJECT(&s->rng), true, "realized", &err); 237 if (err) { 238 error_propagate(errp, err); 239 return; 240 } 241 242 memory_region_add_subregion(&s->peri_mr, RNG_OFFSET, 243 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng), 0)); 244 245 /* Extended Mass Media Controller 246 * 247 * Compatible with: 248 * - SD Host Controller Specification Version 3.0 Draft 1.0 249 * - SDIO Specification Version 3.0 250 * - MMC Specification Version 4.4 251 * 252 * For the exact details please refer to the Arasan documentation: 253 * SD3.0_Host_AHB_eMMC4.4_Usersguide_ver5.9_jan11_10.pdf 254 */ 255 object_property_set_uint(OBJECT(&s->sdhci), 3, "sd-spec-version", &err); 256 object_property_set_uint(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg", 257 &err); 258 object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk", 259 &err); 260 if (err) { 261 error_propagate(errp, err); 262 return; 263 } 264 265 object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err); 266 if (err) { 267 error_propagate(errp, err); 268 return; 269 } 270 271 memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET, 272 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0)); 273 sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0, 274 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 275 INTERRUPT_ARASANSDIO)); 276 277 /* SDHOST */ 278 object_property_set_bool(OBJECT(&s->sdhost), true, "realized", &err); 279 if (err) { 280 error_propagate(errp, err); 281 return; 282 } 283 284 memory_region_add_subregion(&s->peri_mr, MMCI0_OFFSET, 285 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhost), 0)); 286 sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhost), 0, 287 qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, 288 INTERRUPT_SDIO)); 289 290 /* DMA Channels */ 291 object_property_set_bool(OBJECT(&s->dma), true, "realized", &err); 292 if (err) { 293 error_propagate(errp, err); 294 return; 295 } 296 297 memory_region_add_subregion(&s->peri_mr, DMA_OFFSET, 298 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0)); 299 memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET, 300 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1)); 301 302 for (n = 0; n <= 12; n++) { 303 sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n, 304 qdev_get_gpio_in_named(DEVICE(&s->ic), 305 BCM2835_IC_GPU_IRQ, 306 INTERRUPT_DMA0 + n)); 307 } 308 309 /* GPIO */ 310 object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err); 311 if (err) { 312 error_propagate(errp, err); 313 return; 314 } 315 316 memory_region_add_subregion(&s->peri_mr, GPIO_OFFSET, 317 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gpio), 0)); 318 319 object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->gpio), "sd-bus", 320 &err); 321 if (err) { 322 error_propagate(errp, err); 323 return; 324 } 325 } 326 327 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data) 328 { 329 DeviceClass *dc = DEVICE_CLASS(oc); 330 331 dc->realize = bcm2835_peripherals_realize; 332 } 333 334 static const TypeInfo bcm2835_peripherals_type_info = { 335 .name = TYPE_BCM2835_PERIPHERALS, 336 .parent = TYPE_SYS_BUS_DEVICE, 337 .instance_size = sizeof(BCM2835PeripheralState), 338 .instance_init = bcm2835_peripherals_init, 339 .class_init = bcm2835_peripherals_class_init, 340 }; 341 342 static void bcm2835_peripherals_register_types(void) 343 { 344 type_register_static(&bcm2835_peripherals_type_info); 345 } 346 347 type_init(bcm2835_peripherals_register_types) 348