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/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
  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     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     /* Random Number Generator */
  90     object_initialize(&s->rng, sizeof(s->rng), TYPE_BCM2835_RNG);
  91     object_property_add_child(obj, "rng", OBJECT(&s->rng), NULL);
  92     qdev_set_parent_bus(DEVICE(&s->rng), sysbus_get_default());
  93
  94     /* Extended Mass Media Controller */
  95     object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI);
  96     object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL);
  97     qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default());
  98
  99     /* SDHOST */
 100     object_initialize(&s->sdhost, sizeof(s->sdhost), TYPE_BCM2835_SDHOST);
 101     object_property_add_child(obj, "sdhost", OBJECT(&s->sdhost), NULL);
 102     qdev_set_parent_bus(DEVICE(&s->sdhost), sysbus_get_default());
 103
 104     /* DMA Channels */
 105     object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA);
 106     object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL);
 107     qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default());
 108
 109     object_property_add_const_link(OBJECT(&s->dma), "dma-mr",
 110                                    OBJECT(&s->gpu_bus_mr), &error_abort);
 111
 112     /* GPIO */
 113     object_initialize(&s->gpio, sizeof(s->gpio), TYPE_BCM2835_GPIO);
 114     object_property_add_child(obj, "gpio", OBJECT(&s->gpio), NULL);
 115     qdev_set_parent_bus(DEVICE(&s->gpio), sysbus_get_default());
 116
 117     object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhci",
 118                                    OBJECT(&s->sdhci.sdbus), &error_abort);
 119     object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhost",
 120                                    OBJECT(&s->sdhost.sdbus), &error_abort);
 121 }
 122
 123 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
 124 {
 125     BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev);
 126     Object *obj;
 127     MemoryRegion *ram;
 128     Error *err = NULL;
 129     uint32_t ram_size, vcram_size;
 130     int n;
 131
 132     obj = object_property_get_link(OBJECT(dev), "ram", &err);
 133     if (obj == NULL) {
 134         error_setg(errp, "%s: required ram link not found: %s",
 135                    __func__, error_get_pretty(err));
 136         return;
 137     }
 138
 139     ram = MEMORY_REGION(obj);
 140     ram_size = memory_region_size(ram);
 141
 142     /* Map peripherals and RAM into the GPU address space. */
 143     memory_region_init_alias(&s->peri_mr_alias, OBJECT(s),
 144                              "bcm2835-peripherals", &s->peri_mr, 0,
 145                              memory_region_size(&s->peri_mr));
 146
 147     memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE,
 148                                         &s->peri_mr_alias, 1);
 149
 150     /* RAM is aliased four times (different cache configurations) on the GPU */
 151     for (n = 0; n < 4; n++) {
 152         memory_region_init_alias(&s->ram_alias[n], OBJECT(s),
 153                                  "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size);
 154         memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30,
 155                                             &s->ram_alias[n], 0);
 156     }
 157
 158     /* Interrupt Controller */
 159     object_property_set_bool(OBJECT(&s->ic), true, "realized", &err);
 160     if (err) {
 161         error_propagate(errp, err);
 162         return;
 163     }
 164
 165     memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET,
 166                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0));
 167     sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic));
 168
 169     /* UART0 */
 170     qdev_prop_set_chr(DEVICE(s->uart0), "chardev", serial_hds[0]);
 171     object_property_set_bool(OBJECT(s->uart0), true, "realized", &err);
 172     if (err) {
 173         error_propagate(errp, err);
 174         return;
 175     }
 176
 177     memory_region_add_subregion(&s->peri_mr, UART0_OFFSET,
 178                                 sysbus_mmio_get_region(s->uart0, 0));
 179     sysbus_connect_irq(s->uart0, 0,
 180         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 181                                INTERRUPT_UART));
 182     /* AUX / UART1 */
 183     qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hds[1]);
 184
 185     object_property_set_bool(OBJECT(&s->aux), true, "realized", &err);
 186     if (err) {
 187         error_propagate(errp, err);
 188         return;
 189     }
 190
 191     memory_region_add_subregion(&s->peri_mr, UART1_OFFSET,
 192                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0));
 193     sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0,
 194         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 195                                INTERRUPT_AUX));
 196
 197     /* Mailboxes */
 198     object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err);
 199     if (err) {
 200         error_propagate(errp, err);
 201         return;
 202     }
 203
 204     memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET,
 205                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0));
 206     sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0,
 207         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
 208                                INTERRUPT_ARM_MAILBOX));
 209
 210     /* Framebuffer */
 211     vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size",
 212                                                    &err);
 213     if (err) {
 214         error_propagate(errp, err);
 215         return;
 216     }
 217
 218     object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size,
 219                             "vcram-base", &err);
 220     if (err) {
 221         error_propagate(errp, err);
 222         return;
 223     }
 224
 225     object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
 226     if (err) {
 227         error_propagate(errp, err);
 228         return;
 229     }
 230
 231     memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT,
 232                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0));
 233     sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0,
 234                        qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
 235
 236     /* Property channel */
 237     object_property_set_bool(OBJECT(&s->property), true, "realized", &err);
 238     if (err) {
 239         error_propagate(errp, err);
 240         return;
 241     }
 242
 243     memory_region_add_subregion(&s->mbox_mr,
 244                 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT,
 245                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0));
 246     sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0,
 247                       qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY));
 248
 249     /* Random Number Generator */
 250     object_property_set_bool(OBJECT(&s->rng), true, "realized", &err);
 251     if (err) {
 252         error_propagate(errp, err);
 253         return;
 254     }
 255
 256     memory_region_add_subregion(&s->peri_mr, RNG_OFFSET,
 257                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng), 0));
 258
 259     /* Extended Mass Media Controller */
 260     object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg",
 261                             &err);
 262     if (err) {
 263         error_propagate(errp, err);
 264         return;
 265     }
 266
 267     object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk",
 268                              &err);
 269     if (err) {
 270         error_propagate(errp, err);
 271         return;
 272     }
 273
 274     object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
 275     if (err) {
 276         error_propagate(errp, err);
 277         return;
 278     }
 279
 280     memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET,
 281                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0));
 282     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0,
 283         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 284                                INTERRUPT_ARASANSDIO));
 285
 286     /* SDHOST */
 287     object_property_set_bool(OBJECT(&s->sdhost), true, "realized", &err);
 288     if (err) {
 289         error_propagate(errp, err);
 290         return;
 291     }
 292
 293     memory_region_add_subregion(&s->peri_mr, MMCI0_OFFSET,
 294                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhost), 0));
 295     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhost), 0,
 296         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 297                                INTERRUPT_SDIO));
 298
 299     /* DMA Channels */
 300     object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
 301     if (err) {
 302         error_propagate(errp, err);
 303         return;
 304     }
 305
 306     memory_region_add_subregion(&s->peri_mr, DMA_OFFSET,
 307                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0));
 308     memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET,
 309                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1));
 310
 311     for (n = 0; n <= 12; n++) {
 312         sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n,
 313                            qdev_get_gpio_in_named(DEVICE(&s->ic),
 314                                                   BCM2835_IC_GPU_IRQ,
 315                                                   INTERRUPT_DMA0 + n));
 316     }
 317
 318     /* GPIO */
 319     object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err);
 320     if (err) {
 321         error_propagate(errp, err);
 322         return;
 323     }
 324
 325     memory_region_add_subregion(&s->peri_mr, GPIO_OFFSET,
 326                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gpio), 0));
 327
 328     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->gpio), "sd-bus",
 329                               &err);
 330     if (err) {
 331         error_propagate(errp, err);
 332         return;
 333     }
 334 }
 335
 336 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
 337 {
 338     DeviceClass *dc = DEVICE_CLASS(oc);
 339
 340     dc->realize = bcm2835_peripherals_realize;
 341 }
 342
 343 static const TypeInfo bcm2835_peripherals_type_info = {
 344     .name = TYPE_BCM2835_PERIPHERALS,
 345     .parent = TYPE_SYS_BUS_DEVICE,
 346     .instance_size = sizeof(BCM2835PeripheralState),
 347     .instance_init = bcm2835_peripherals_init,
 348     .class_init = bcm2835_peripherals_class_init,
 349 };
 350
 351 static void bcm2835_peripherals_register_types(void)
 352 {
 353     type_register_static(&bcm2835_peripherals_type_info);
 354 }
 355
 356 type_init(bcm2835_peripherals_register_types)