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
  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 0x52034b4
  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    /* Extended Mass Media Controller */
  89    object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI);
  90    object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL);
  91    qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default());
  92
  93    /* DMA Channels */
  94    object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA);
  95    object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL);
  96    qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default());
  97
  98    object_property_add_const_link(OBJECT(&s->dma), "dma-mr",
  99                                   OBJECT(&s->gpu_bus_mr), &error_abort);
 100}
 101
 102static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
 103{
 104    BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev);
 105    Object *obj;
 106    MemoryRegion *ram;
 107    Error *err = NULL;
 108    uint32_t ram_size, vcram_size;
 109    CharDriverState *chr;
 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    object_property_set_bool(OBJECT(s->uart0), true, "realized", &err);
 151    if (err) {
 152        error_propagate(errp, err);
 153        return;
 154    }
 155
 156    memory_region_add_subregion(&s->peri_mr, UART0_OFFSET,
 157                                sysbus_mmio_get_region(s->uart0, 0));
 158    sysbus_connect_irq(s->uart0, 0,
 159        qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 160                               INTERRUPT_UART));
 161
 162    /* AUX / UART1 */
 163    /* TODO: don't call qemu_char_get_next_serial() here, instead set
 164     * chardev properties for each uart at the board level, once pl011
 165     * (uart0) has been updated to avoid qemu_char_get_next_serial()
 166     */
 167    chr = qemu_char_get_next_serial();
 168    if (chr == NULL) {
 169        chr = qemu_chr_new("bcm2835.uart1", "null", NULL);
 170    }
 171    qdev_prop_set_chr(DEVICE(&s->aux), "chardev", chr);
 172
 173    object_property_set_bool(OBJECT(&s->aux), true, "realized", &err);
 174    if (err) {
 175        error_propagate(errp, err);
 176        return;
 177    }
 178
 179    memory_region_add_subregion(&s->peri_mr, UART1_OFFSET,
 180                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0));
 181    sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0,
 182        qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 183                               INTERRUPT_AUX));
 184
 185    /* Mailboxes */
 186    object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err);
 187    if (err) {
 188        error_propagate(errp, err);
 189        return;
 190    }
 191
 192    memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET,
 193                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0));
 194    sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0,
 195        qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
 196                               INTERRUPT_ARM_MAILBOX));
 197
 198    /* Framebuffer */
 199    vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size",
 200                                                   &err);
 201    if (err) {
 202        error_propagate(errp, err);
 203        return;
 204    }
 205
 206    object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size,
 207                            "vcram-base", &err);
 208    if (err) {
 209        error_propagate(errp, err);
 210        return;
 211    }
 212
 213    object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
 214    if (err) {
 215        error_propagate(errp, err);
 216        return;
 217    }
 218
 219    memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT,
 220                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0));
 221    sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0,
 222                       qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
 223
 224    /* Property channel */
 225    object_property_set_bool(OBJECT(&s->property), true, "realized", &err);
 226    if (err) {
 227        error_propagate(errp, err);
 228        return;
 229    }
 230
 231    memory_region_add_subregion(&s->mbox_mr,
 232                MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT,
 233                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0));
 234    sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0,
 235                      qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY));
 236
 237    /* Extended Mass Media Controller */
 238    object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg",
 239                            &err);
 240    if (err) {
 241        error_propagate(errp, err);
 242        return;
 243    }
 244
 245    object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk",
 246                             &err);
 247    if (err) {
 248        error_propagate(errp, err);
 249        return;
 250    }
 251
 252    object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
 253    if (err) {
 254        error_propagate(errp, err);
 255        return;
 256    }
 257
 258    memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET,
 259                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0));
 260    sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0,
 261        qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 262                               INTERRUPT_ARASANSDIO));
 263    object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->sdhci), "sd-bus",
 264                              &err);
 265    if (err) {
 266        error_propagate(errp, err);
 267        return;
 268    }
 269
 270    /* DMA Channels */
 271    object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
 272    if (err) {
 273        error_propagate(errp, err);
 274        return;
 275    }
 276
 277    memory_region_add_subregion(&s->peri_mr, DMA_OFFSET,
 278                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0));
 279    memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET,
 280                sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1));
 281
 282    for (n = 0; n <= 12; n++) {
 283        sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n,
 284                           qdev_get_gpio_in_named(DEVICE(&s->ic),
 285                                                  BCM2835_IC_GPU_IRQ,
 286                                                  INTERRUPT_DMA0 + n));
 287    }
 288}
 289
 290static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
 291{
 292    DeviceClass *dc = DEVICE_CLASS(oc);
 293
 294    dc->realize = bcm2835_peripherals_realize;
 295    /* Reason: realize() method uses qemu_char_get_next_serial() */
 296    dc->cannot_instantiate_with_device_add_yet = true;
 297}
 298
 299static const TypeInfo bcm2835_peripherals_type_info = {
 300    .name = TYPE_BCM2835_PERIPHERALS,
 301    .parent = TYPE_SYS_BUS_DEVICE,
 302    .instance_size = sizeof(BCM2835PeripheralState),
 303    .instance_init = bcm2835_peripherals_init,
 304    .class_init = bcm2835_peripherals_class_init,
 305};
 306
 307static void bcm2835_peripherals_register_types(void)
 308{
 309    type_register_static(&bcm2835_peripherals_type_info);
 310}
 311
 312type_init(bcm2835_peripherals_register_types)
 313