hw/arm/bcm2835_peripherals.c

   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     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     /* System timer */
  59     object_initialize(&s->st, sizeof(s->st), TYPE_BCM2835_ST);
  60     object_property_add_child(obj, "systimer", OBJECT(&s->st), NULL);
  61     qdev_set_parent_bus(DEVICE(&s->st), sysbus_get_default());
  62
  63     /* ARM timer */
  64     object_initialize(&s->timer, sizeof(s->timer), TYPE_BCM2835_TIMER);
  65     object_property_add_child(obj, "armtimer", OBJECT(&s->timer), NULL);
  66     qdev_set_parent_bus(DEVICE(&s->timer), sysbus_get_default());
  67
  68     /* USB controller */
  69     object_initialize(&s->usb, sizeof(s->usb), TYPE_BCM2835_USB);
  70     object_property_add_child(obj, "usb", OBJECT(&s->usb), NULL);
  71     qdev_set_parent_bus(DEVICE(&s->usb), sysbus_get_default());
  72
  73     object_property_add_const_link(OBJECT(&s->usb), "dma_mr",
  74                                    OBJECT(&s->gpu_bus_mr), &error_abort);
  75
  76     /* MPHI - Message-based Parallel Host Interface */
  77     object_initialize(&s->mphi, sizeof(s->mphi), TYPE_BCM2835_MPHI);
  78     object_property_add_child(obj, "mphi", OBJECT(&s->mphi), NULL);
  79     qdev_set_parent_bus(DEVICE(&s->mphi), sysbus_get_default());
  80
  81     /* Mailboxes */
  82     object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX);
  83     object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL);
  84     qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default());
  85
  86     object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr",
  87                                    OBJECT(&s->mbox_mr), &error_abort);
  88
  89     /* Power management */
  90     object_initialize(&s->power, sizeof(s->power), TYPE_BCM2835_POWER);
  91     object_property_add_child(obj, "power", OBJECT(&s->power), NULL);
  92     qdev_set_parent_bus(DEVICE(&s->power), sysbus_get_default());
  93
  94     /* Framebuffer */
  95     object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB);
  96     object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL);
  97     object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size",
  98                               &error_abort);
  99     qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default());
 100
 101     object_property_add_const_link(OBJECT(&s->fb), "dma-mr",
 102                                    OBJECT(&s->gpu_bus_mr), &error_abort);
 103
 104     /* Property channel */
 105     object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY);
 106     object_property_add_child(obj, "property", OBJECT(&s->property), NULL);
 107     object_property_add_alias(obj, "board-rev", OBJECT(&s->property),
 108                               "board-rev", &error_abort);
 109     qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default());
 110
 111     object_property_add_const_link(OBJECT(&s->property), "fb",
 112                                    OBJECT(&s->fb), &error_abort);
 113     object_property_add_const_link(OBJECT(&s->property), "dma-mr",
 114                                    OBJECT(&s->gpu_bus_mr), &error_abort);
 115
 116     /* Random Number Generator */
 117     object_initialize(&s->rng, sizeof(s->rng), TYPE_BCM2835_RNG);
 118     object_property_add_child(obj, "rng", OBJECT(&s->rng), NULL);
 119     qdev_set_parent_bus(DEVICE(&s->rng), sysbus_get_default());
 120
 121     /* Extended Mass Media Controller */
 122     object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI);
 123     object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL);
 124     qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default());
 125
 126     /* SDHOST */
 127     object_initialize(&s->sdhost, sizeof(s->sdhost), TYPE_BCM2835_SDHOST);
 128     object_property_add_child(obj, "sdhost", OBJECT(&s->sdhost), NULL);
 129     qdev_set_parent_bus(DEVICE(&s->sdhost), sysbus_get_default());
 130
 131     /* DMA Channels */
 132     object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA);
 133     object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL);
 134     qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default());
 135
 136     object_property_add_const_link(OBJECT(&s->dma), "dma-mr",
 137                                    OBJECT(&s->gpu_bus_mr), &error_abort);
 138
 139     /* GPIO */
 140     object_initialize(&s->gpio, sizeof(s->gpio), TYPE_BCM2835_GPIO);
 141     object_property_add_child(obj, "gpio", OBJECT(&s->gpio), NULL);
 142     qdev_set_parent_bus(DEVICE(&s->gpio), sysbus_get_default());
 143
 144     object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhci",
 145                                    OBJECT(&s->sdhci.sdbus), &error_abort);
 146     object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhost",
 147                                    OBJECT(&s->sdhost.sdbus), &error_abort);
 148 }
 149
 150 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
 151 {
 152     BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev);
 153     Object *obj;
 154     MemoryRegion *ram;
 155     Error *err = NULL;
 156     uint64_t ram_size, vcram_size;
 157     int n;
 158
 159     obj = object_property_get_link(OBJECT(dev), "ram", &err);
 160     if (obj == NULL) {
 161         error_setg(errp, "%s: required ram link not found: %s",
 162                    __func__, error_get_pretty(err));
 163         return;
 164     }
 165
 166     ram = MEMORY_REGION(obj);
 167     ram_size = memory_region_size(ram);
 168
 169     /* Map peripherals and RAM into the GPU address space. */
 170     memory_region_init_alias(&s->peri_mr_alias, OBJECT(s),
 171                              "bcm2835-peripherals", &s->peri_mr, 0,
 172                              memory_region_size(&s->peri_mr));
 173
 174     memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE,
 175                                         &s->peri_mr_alias, 1);
 176
 177     /* RAM is aliased four times (different cache configurations) on the GPU */
 178     for (n = 0; n < 4; n++) {
 179         memory_region_init_alias(&s->ram_alias[n], OBJECT(s),
 180                                  "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size);
 181         memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30,
 182                                             &s->ram_alias[n], 0);
 183     }
 184
 185     /* Interrupt Controller */
 186     object_property_set_bool(OBJECT(&s->ic), true, "realized", &err);
 187     if (err) {
 188         error_propagate(errp, err);
 189         return;
 190     }
 191
 192     memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET,
 193                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0));
 194     sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic));
 195
 196     /* UART0 */
 197     qdev_prop_set_chr(DEVICE(s->uart0), "chardev", serial_hd(0));
 198     object_property_set_bool(OBJECT(s->uart0), true, "realized", &err);
 199     if (err) {
 200         error_propagate(errp, err);
 201         return;
 202     }
 203
 204     memory_region_add_subregion(&s->peri_mr, UART0_OFFSET,
 205                                 sysbus_mmio_get_region(s->uart0, 0));
 206     sysbus_connect_irq(s->uart0, 0,
 207         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 208                                INTERRUPT_UART));
 209     /* AUX / UART1 */
 210     qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hd(1));
 211
 212     object_property_set_bool(OBJECT(&s->aux), true, "realized", &err);
 213     if (err) {
 214         error_propagate(errp, err);
 215         return;
 216     }
 217
 218     memory_region_add_subregion(&s->peri_mr, UART1_OFFSET,
 219                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0));
 220     sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0,
 221         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 222                                INTERRUPT_AUX));
 223
 224     /* System timer */
 225     object_property_set_bool(OBJECT(&s->st), true, "realized", &err);
 226     if (err) {
 227         error_propagate(errp, err);
 228         return;
 229     }
 230
 231     memory_region_add_subregion(&s->peri_mr, ST_OFFSET,
 232                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->st), 0));
 233     sysbus_connect_irq(SYS_BUS_DEVICE(&s->st), 0,
 234         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 235                                INTERRUPT_TIMER0));
 236     sysbus_connect_irq(SYS_BUS_DEVICE(&s->st), 1,
 237         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 238                                INTERRUPT_TIMER1));
 239     sysbus_connect_irq(SYS_BUS_DEVICE(&s->st), 2,
 240         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 241                                INTERRUPT_TIMER2));
 242     sysbus_connect_irq(SYS_BUS_DEVICE(&s->st), 3,
 243         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 244                                INTERRUPT_TIMER3));
 245
 246     /* ARM timer */
 247     object_property_set_bool(OBJECT(&s->timer), true, "realized", &err);
 248     if (err) {
 249         error_propagate(errp, err);
 250         return;
 251     }
 252
 253     memory_region_add_subregion(&s->peri_mr, ARMCTRL_TIMER0_1_OFFSET,
 254                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->timer), 0));
 255     sysbus_connect_irq(SYS_BUS_DEVICE(&s->timer), 0,
 256         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
 257                                INTERRUPT_ARM_TIMER));
 258
 259     /* USB controller */
 260     object_property_set_bool(OBJECT(&s->usb), true, "realized", &err);
 261     if (err) {
 262         error_propagate(errp, err);
 263         return;
 264     }
 265
 266     memory_region_add_subregion(&s->peri_mr, USB_OFFSET,
 267                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->usb), 0));
 268     sysbus_connect_irq(SYS_BUS_DEVICE(&s->usb), 0,
 269         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 270                                INTERRUPT_USB));
 271
 272     /* MPHI - Message-based Parallel Host Interface */
 273     object_property_set_bool(OBJECT(&s->mphi), true, "realized", &err);
 274     if (err) {
 275         error_propagate(errp, err);
 276         return;
 277     }
 278
 279     memory_region_add_subregion(&s->peri_mr, MPHI_OFFSET,
 280                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mphi), 0));
 281     sysbus_connect_irq(SYS_BUS_DEVICE(&s->mphi), 0,
 282         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 283                                INTERRUPT_HOSTPORT));
 284
 285     /* Mailboxes */
 286     object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err);
 287     if (err) {
 288         error_propagate(errp, err);
 289         return;
 290     }
 291
 292     memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET,
 293                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0));
 294     sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0,
 295         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
 296                                INTERRUPT_ARM_MAILBOX));
 297
 298     /* Power management */
 299     object_property_set_bool(OBJECT(&s->power), true, "realized", &err);
 300     if (err) {
 301         error_propagate(errp, err);
 302         return;
 303     }
 304
 305     memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_POWER << MBOX_AS_CHAN_SHIFT,
 306                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->power), 0));
 307     sysbus_connect_irq(SYS_BUS_DEVICE(&s->power), 0,
 308                        qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_POWER));
 309
 310     /* Framebuffer */
 311     vcram_size = object_property_get_uint(OBJECT(s), "vcram-size", &err);
 312     if (err) {
 313         error_propagate(errp, err);
 314         return;
 315     }
 316
 317     object_property_set_uint(OBJECT(&s->fb), ram_size - vcram_size,
 318                              "vcram-base", &err);
 319     if (err) {
 320         error_propagate(errp, err);
 321         return;
 322     }
 323
 324     object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
 325     if (err) {
 326         error_propagate(errp, err);
 327         return;
 328     }
 329
 330     memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT,
 331                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0));
 332     sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0,
 333                        qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
 334
 335     /* Property channel */
 336     object_property_set_bool(OBJECT(&s->property), true, "realized", &err);
 337     if (err) {
 338         error_propagate(errp, err);
 339         return;
 340     }
 341
 342     memory_region_add_subregion(&s->mbox_mr,
 343                 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT,
 344                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0));
 345     sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0,
 346                       qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY));
 347
 348     /* Random Number Generator */
 349     object_property_set_bool(OBJECT(&s->rng), true, "realized", &err);
 350     if (err) {
 351         error_propagate(errp, err);
 352         return;
 353     }
 354
 355     memory_region_add_subregion(&s->peri_mr, RNG_OFFSET,
 356                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng), 0));
 357
 358     /* Extended Mass Media Controller
 359      *
 360      * Compatible with:
 361      * - SD Host Controller Specification Version 3.0 Draft 1.0
 362      * - SDIO Specification Version 3.0
 363      * - MMC Specification Version 4.4
 364      *
 365      * For the exact details please refer to the Arasan documentation:
 366      *   SD3.0_Host_AHB_eMMC4.4_Usersguide_ver5.9_jan11_10.pdf
 367      */
 368     object_property_set_uint(OBJECT(&s->sdhci), 3, "sd-spec-version", &err);
 369     object_property_set_uint(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg",
 370                              &err);
 371     object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk",
 372                              &err);
 373     if (err) {
 374         error_propagate(errp, err);
 375         return;
 376     }
 377
 378     object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
 379     if (err) {
 380         error_propagate(errp, err);
 381         return;
 382     }
 383
 384     memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET,
 385                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0));
 386     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0,
 387         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 388                                INTERRUPT_ARASANSDIO));
 389
 390     /* SDHOST */
 391     object_property_set_bool(OBJECT(&s->sdhost), true, "realized", &err);
 392     if (err) {
 393         error_propagate(errp, err);
 394         return;
 395     }
 396
 397     memory_region_add_subregion(&s->peri_mr, MMCI0_OFFSET,
 398                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhost), 0));
 399     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhost), 0,
 400         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 401                                INTERRUPT_SDIO));
 402
 403     /* DMA Channels */
 404     object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
 405     if (err) {
 406         error_propagate(errp, err);
 407         return;
 408     }
 409
 410     memory_region_add_subregion(&s->peri_mr, DMA_OFFSET,
 411                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0));
 412     memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET,
 413                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1));
 414
 415     for (n = 0; n <= 12; n++) {
 416         sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n,
 417                            qdev_get_gpio_in_named(DEVICE(&s->ic),
 418                                                   BCM2835_IC_GPU_IRQ,
 419                                                   INTERRUPT_DMA0 + n));
 420     }
 421
 422     /* GPIO */
 423     object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err);
 424     if (err) {
 425         error_propagate(errp, err);
 426         return;
 427     }
 428
 429     memory_region_add_subregion(&s->peri_mr, GPIO_OFFSET,
 430                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gpio), 0));
 431
 432     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->gpio), "sd-bus",
 433                               &err);
 434     if (err) {
 435         error_propagate(errp, err);
 436         return;
 437     }
 438 }
 439
 440 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
 441 {
 442     DeviceClass *dc = DEVICE_CLASS(oc);
 443
 444     dc->realize = bcm2835_peripherals_realize;
 445 }
 446
 447 static const TypeInfo bcm2835_peripherals_type_info = {
 448     .name = TYPE_BCM2835_PERIPHERALS,
 449     .parent = TYPE_SYS_BUS_DEVICE,
 450     .instance_size = sizeof(BCM2835PeripheralState),
 451     .instance_init = bcm2835_peripherals_init,
 452     .class_init = bcm2835_peripherals_class_init,
 453 };
 454
 455 static void bcm2835_peripherals_register_types(void)
 456 {
 457     type_register_static(&bcm2835_peripherals_type_info);
 458 }
 459
 460 type_init(bcm2835_peripherals_register_types)