LXR qemu/hw/arm/bcm2835

   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
  24static 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
 122static 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_hd(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_hd(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     *
 259     * Compatible with:
 260     * - SD Host Controller Specification Version 3.0 Draft 1.0
 261     * - SDIO Specification Version 3.0
 262     * - MMC Specification Version 4.4
 263     *
 264     * For the exact details please refer to the Arasan documentation:
 265     *   SD3.0_Host_AHB_eMMC4.4_Usersguide_ver5.9_jan11_10.pdf
 266     */
 267    object_property_set_uint(OBJECT(&s->sdhci), 3, "sd-spec-version", &err);
 268    object_property_set_uint(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg",
 269                             &err);
 270    object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk",
 271                             &err);
 272    if (err) {
 273        error_propagate(errp, err);
 274        return;
 275    }
 276
 277    object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
 278    if (err) {
 279        error_propagate(errp, err);
 280        return;
 281    }
 282
 283    memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET,
 284                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0));
 285    sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0,
 286        qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 287                               INTERRUPT_ARASANSDIO));
 288
 289    /* SDHOST */
 290    object_property_set_bool(OBJECT(&s->sdhost), true, "realized", &err);
 291    if (err) {
 292        error_propagate(errp, err);
 293        return;
 294    }
 295
 296    memory_region_add_subregion(&s->peri_mr, MMCI0_OFFSET,
 297                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhost), 0));
 298    sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhost), 0,
 299        qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 300                               INTERRUPT_SDIO));
 301
 302    /* DMA Channels */
 303    object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
 304    if (err) {
 305        error_propagate(errp, err);
 306        return;
 307    }
 308
 309    memory_region_add_subregion(&s->peri_mr, DMA_OFFSET,
 310                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0));
 311    memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET,
 312                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1));
 313
 314    for (n = 0; n <= 12; n++) {
 315        sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n,
 316                           qdev_get_gpio_in_named(DEVICE(&s->ic),
 317                                                  BCM2835_IC_GPU_IRQ,
 318                                                  INTERRUPT_DMA0 + n));
 319    }
 320
 321    /* GPIO */
 322    object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err);
 323    if (err) {
 324        error_propagate(errp, err);
 325        return;
 326    }
 327
 328    memory_region_add_subregion(&s->peri_mr, GPIO_OFFSET,
 329                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gpio), 0));
 330
 331    object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->gpio), "sd-bus",
 332                              &err);
 333    if (err) {
 334        error_propagate(errp, err);
 335        return;
 336    }
 337}
 338
 339static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
 340{
 341    DeviceClass *dc = DEVICE_CLASS(oc);
 342
 343    dc->realize = bcm2835_peripherals_realize;
 344}
 345
 346static const TypeInfo bcm2835_peripherals_type_info = {
 347    .name = TYPE_BCM2835_PERIPHERALS,
 348    .parent = TYPE_SYS_BUS_DEVICE,
 349    .instance_size = sizeof(BCM2835PeripheralState),
 350    .instance_init = bcm2835_peripherals_init,
 351    .class_init = bcm2835_peripherals_class_init,
 352};
 353
 354static void bcm2835_peripherals_register_types(void)
 355{
 356    type_register_static(&bcm2835_peripherals_type_info);
 357}
 358
 359type_init(bcm2835_peripherals_register_types)
 360