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/char.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 0x52034b4
  24
  25static 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    object_initialize(&s->ic, sizeof(s->ic), TYPE_BCM2835_IC);
  46    object_property_add_child(obj, "ic", OBJECT(&s->ic), NULL);
  47    qdev_set_parent_bus(DEVICE(&s->ic), sysbus_get_default());
  48
  49    /* UART0 */
  50    s->uart0 = SYS_BUS_DEVICE(object_new("pl011"));
  51    object_property_add_child(obj, "uart0", OBJECT(s->uart0), NULL);
  52    qdev_set_parent_bus(DEVICE(s->uart0), sysbus_get_default());
  53
  54    /* AUX / UART1 */
  55    object_initialize(&s->aux, sizeof(s->aux), TYPE_BCM2835_AUX);
  56    object_property_add_child(obj, "aux", OBJECT(&s->aux), NULL);
  57    qdev_set_parent_bus(DEVICE(&s->aux), sysbus_get_default());
  58
  59    /* Mailboxes */
  60    object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX);
  61    object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL);
  62    qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default());
  63
  64    object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr",
  65                                   OBJECT(&s->mbox_mr), &error_abort);
  66
  67    /* Framebuffer */
  68    object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB);
  69    object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL);
  70    object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size",
  71                              &error_abort);
  72    qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default());
  73
  74    object_property_add_const_link(OBJECT(&s->fb), "dma-mr",
  75                                   OBJECT(&s->gpu_bus_mr), &error_abort);
  76
  77    /* Property channel */
  78    object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY);
  79    object_property_add_child(obj, "property", OBJECT(&s->property), NULL);
  80    object_property_add_alias(obj, "board-rev", OBJECT(&s->property),
  81                              "board-rev", &error_abort);
  82    qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default());
  83
  84    object_property_add_const_link(OBJECT(&s->property), "fb",
  85                                   OBJECT(&s->fb), &error_abort);
  86    object_property_add_const_link(OBJECT(&s->property), "dma-mr",
  87                                   OBJECT(&s->gpu_bus_mr), &error_abort);
  88
  89    /* Extended Mass Media Controller */
  90    object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI);
  91    object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL);
  92    qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default());
  93
  94    /* DMA Channels */
  95    object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA);
  96    object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL);
  97    qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default());
  98
  99    object_property_add_const_link(OBJECT(&s->dma), "dma-mr",
 100                                   OBJECT(&s->gpu_bus_mr), &error_abort);
 101}
 102
 103static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
 104{
 105    BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev);
 106    Object *obj;
 107    MemoryRegion *ram;
 108    Error *err = NULL;
 109    uint32_t ram_size, vcram_size;
 110    int n;
 111
 112    obj = object_property_get_link(OBJECT(dev), "ram", &err);
 113    if (obj == NULL) {
 114        error_setg(errp, "%s: required ram link not found: %s",
 115                   __func__, error_get_pretty(err));
 116        return;
 117    }
 118
 119    ram = MEMORY_REGION(obj);
 120    ram_size = memory_region_size(ram);
 121
 122    /* Map peripherals and RAM into the GPU address space. */
 123    memory_region_init_alias(&s->peri_mr_alias, OBJECT(s),
 124                             "bcm2835-peripherals", &s->peri_mr, 0,
 125                             memory_region_size(&s->peri_mr));
 126
 127    memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE,
 128                                        &s->peri_mr_alias, 1);
 129
 130    /* RAM is aliased four times (different cache configurations) on the GPU */
 131    for (n = 0; n < 4; n++) {
 132        memory_region_init_alias(&s->ram_alias[n], OBJECT(s),
 133                                 "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size);
 134        memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30,
 135                                            &s->ram_alias[n], 0);
 136    }
 137
 138    /* Interrupt Controller */
 139    object_property_set_bool(OBJECT(&s->ic), true, "realized", &err);
 140    if (err) {
 141        error_propagate(errp, err);
 142        return;
 143    }
 144
 145    memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET,
 146                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0));
 147    sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic));
 148
 149    /* UART0 */
 150    qdev_prop_set_chr(DEVICE(s->uart0), "chardev", serial_hds[0]);
 151    object_property_set_bool(OBJECT(s->uart0), true, "realized", &err);
 152    if (err) {
 153        error_propagate(errp, err);
 154        return;
 155    }
 156
 157    memory_region_add_subregion(&s->peri_mr, UART0_OFFSET,
 158                                sysbus_mmio_get_region(s->uart0, 0));
 159    sysbus_connect_irq(s->uart0, 0,
 160        qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 161                               INTERRUPT_UART));
 162    /* AUX / UART1 */
 163    qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hds[1]);
 164
 165    object_property_set_bool(OBJECT(&s->aux), true, "realized", &err);
 166    if (err) {
 167        error_propagate(errp, err);
 168        return;
 169    }
 170
 171    memory_region_add_subregion(&s->peri_mr, UART1_OFFSET,
 172                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0));
 173    sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0,
 174        qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 175                               INTERRUPT_AUX));
 176
 177    /* Mailboxes */
 178    object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err);
 179    if (err) {
 180        error_propagate(errp, err);
 181        return;
 182    }
 183
 184    memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET,
 185                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0));
 186    sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0,
 187        qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
 188                               INTERRUPT_ARM_MAILBOX));
 189
 190    /* Framebuffer */
 191    vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size",
 192                                                   &err);
 193    if (err) {
 194        error_propagate(errp, err);
 195        return;
 196    }
 197
 198    object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size,
 199                            "vcram-base", &err);
 200    if (err) {
 201        error_propagate(errp, err);
 202        return;
 203    }
 204
 205    object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
 206    if (err) {
 207        error_propagate(errp, err);
 208        return;
 209    }
 210
 211    memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT,
 212                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0));
 213    sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0,
 214                       qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
 215
 216    /* Property channel */
 217    object_property_set_bool(OBJECT(&s->property), true, "realized", &err);
 218    if (err) {
 219        error_propagate(errp, err);
 220        return;
 221    }
 222
 223    memory_region_add_subregion(&s->mbox_mr,
 224                MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT,
 225                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0));
 226    sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0,
 227                      qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY));
 228
 229    /* Extended Mass Media Controller */
 230    object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg",
 231                            &err);
 232    if (err) {
 233        error_propagate(errp, err);
 234        return;
 235    }
 236
 237    object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk",
 238                             &err);
 239    if (err) {
 240        error_propagate(errp, err);
 241        return;
 242    }
 243
 244    object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
 245    if (err) {
 246        error_propagate(errp, err);
 247        return;
 248    }
 249
 250    memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET,
 251                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0));
 252    sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0,
 253        qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 254                               INTERRUPT_ARASANSDIO));
 255    object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->sdhci), "sd-bus",
 256                              &err);
 257    if (err) {
 258        error_propagate(errp, err);
 259        return;
 260    }
 261
 262    /* DMA Channels */
 263    object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
 264    if (err) {
 265        error_propagate(errp, err);
 266        return;
 267    }
 268
 269    memory_region_add_subregion(&s->peri_mr, DMA_OFFSET,
 270                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0));
 271    memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET,
 272                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1));
 273
 274    for (n = 0; n <= 12; n++) {
 275        sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n,
 276                           qdev_get_gpio_in_named(DEVICE(&s->ic),
 277                                                  BCM2835_IC_GPU_IRQ,
 278                                                  INTERRUPT_DMA0 + n));
 279    }
 280}
 281
 282static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
 283{
 284    DeviceClass *dc = DEVICE_CLASS(oc);
 285
 286    dc->realize = bcm2835_peripherals_realize;
 287}
 288
 289static const TypeInfo bcm2835_peripherals_type_info = {
 290    .name = TYPE_BCM2835_PERIPHERALS,
 291    .parent = TYPE_SYS_BUS_DEVICE,
 292    .instance_size = sizeof(BCM2835PeripheralState),
 293    .instance_init = bcm2835_peripherals_init,
 294    .class_init = bcm2835_peripherals_class_init,
 295};
 296
 297static void bcm2835_peripherals_register_types(void)
 298{
 299    type_register_static(&bcm2835_peripherals_type_info);
 300}
 301
 302type_init(bcm2835_peripherals_register_types)
 303