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 "hw/arm/bcm2835_peripherals.h"
  13 #include "hw/misc/bcm2835_mbox_defs.h"
  14 #include "hw/arm/raspi_platform.h"
  15
  16 /* Peripheral base address on the VC (GPU) system bus */
  17 #define BCM2835_VC_PERI_BASE 0x7e000000
  18
  19 /* Capabilities for SD controller: no DMA, high-speed, default clocks etc. */
  20 #define BCM2835_SDHC_CAPAREG 0x52034b4
  21
  22 static void bcm2835_peripherals_init(Object *obj)
  23 {
  24     BCM2835PeripheralState *s = BCM2835_PERIPHERALS(obj);
  25
  26     /* Memory region for peripheral devices, which we export to our parent */
  27     memory_region_init(&s->peri_mr, obj,"bcm2835-peripherals", 0x1000000);
  28     object_property_add_child(obj, "peripheral-io", OBJECT(&s->peri_mr), NULL);
  29     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_mr);
  30
  31     /* Internal memory region for peripheral bus addresses (not exported) */
  32     memory_region_init(&s->gpu_bus_mr, obj, "bcm2835-gpu", (uint64_t)1 << 32);
  33     object_property_add_child(obj, "gpu-bus", OBJECT(&s->gpu_bus_mr), NULL);
  34
  35     /* Internal memory region for request/response communication with
  36      * mailbox-addressable peripherals (not exported)
  37      */
  38     memory_region_init(&s->mbox_mr, obj, "bcm2835-mbox",
  39                        MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT);
  40
  41     /* Interrupt Controller */
  42     object_initialize(&s->ic, sizeof(s->ic), TYPE_BCM2835_IC);
  43     object_property_add_child(obj, "ic", OBJECT(&s->ic), NULL);
  44     qdev_set_parent_bus(DEVICE(&s->ic), sysbus_get_default());
  45
  46     /* UART0 */
  47     s->uart0 = SYS_BUS_DEVICE(object_new("pl011"));
  48     object_property_add_child(obj, "uart0", OBJECT(s->uart0), NULL);
  49     qdev_set_parent_bus(DEVICE(s->uart0), sysbus_get_default());
  50
  51     /* AUX / UART1 */
  52     object_initialize(&s->aux, sizeof(s->aux), TYPE_BCM2835_AUX);
  53     object_property_add_child(obj, "aux", OBJECT(&s->aux), NULL);
  54     qdev_set_parent_bus(DEVICE(&s->aux), sysbus_get_default());
  55
  56     /* System timer */
  57     object_initialize(&s->st, sizeof(s->st), TYPE_BCM2835_ST);
  58     object_property_add_child(obj, "systimer", OBJECT(&s->st), NULL);
  59     qdev_set_parent_bus(DEVICE(&s->st), sysbus_get_default());
  60
  61     /* ARM timer */
  62     object_initialize(&s->timer, sizeof(s->timer), TYPE_BCM2835_TIMER);
  63     object_property_add_child(obj, "armtimer", OBJECT(&s->timer), NULL);
  64     qdev_set_parent_bus(DEVICE(&s->timer), sysbus_get_default());
  65
  66     /* USB controller */
  67     object_initialize(&s->usb, sizeof(s->usb), TYPE_BCM2835_USB);
  68     object_property_add_child(obj, "usb", OBJECT(&s->usb), NULL);
  69     qdev_set_parent_bus(DEVICE(&s->usb), sysbus_get_default());
  70
  71     object_property_add_const_link(OBJECT(&s->usb), "dma_mr",
  72                                    OBJECT(&s->gpu_bus_mr), &error_abort);
  73
  74     /* MPHI - Message-based Parallel Host Interface */
  75     object_initialize(&s->mphi, sizeof(s->mphi), TYPE_BCM2835_MPHI);
  76     object_property_add_child(obj, "mphi", OBJECT(&s->mphi), NULL);
  77     qdev_set_parent_bus(DEVICE(&s->mphi), sysbus_get_default());
  78
  79     /* Mailboxes */
  80     object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX);
  81     object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL);
  82     qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default());
  83
  84     object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr",
  85                                    OBJECT(&s->mbox_mr), &error_abort);
  86
  87     /* Power management */
  88     object_initialize(&s->power, sizeof(s->power), TYPE_BCM2835_POWER);
  89     object_property_add_child(obj, "power", OBJECT(&s->power), NULL);
  90     qdev_set_parent_bus(DEVICE(&s->power), sysbus_get_default());
  91
  92     /* Framebuffer */
  93     object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB);
  94     object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL);
  95     object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size",
  96                               &error_abort);
  97     qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default());
  98
  99     object_property_add_const_link(OBJECT(&s->fb), "dma-mr",
 100                                    OBJECT(&s->gpu_bus_mr), &error_abort);
 101
 102     /* Property channel */
 103     object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY);
 104     object_property_add_child(obj, "property", OBJECT(&s->property), NULL);
 105     object_property_add_alias(obj, "board-rev", OBJECT(&s->property),
 106                               "board-rev", &error_abort);
 107     qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default());
 108
 109     object_property_add_const_link(OBJECT(&s->property), "fb",
 110                                    OBJECT(&s->fb), &error_abort);
 111     object_property_add_const_link(OBJECT(&s->property), "dma-mr",
 112                                    OBJECT(&s->gpu_bus_mr), &error_abort);
 113
 114     /* Extended Mass Media Controller */
 115     object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI);
 116     object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL);
 117     qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default());
 118
 119     /* DMA Channels */
 120     object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA);
 121     object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL);
 122     qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default());
 123
 124     object_property_add_const_link(OBJECT(&s->dma), "dma-mr",
 125                                    OBJECT(&s->gpu_bus_mr), &error_abort);
 126
 127 }
 128
 129 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
 130 {
 131     BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev);
 132     Object *obj;
 133     MemoryRegion *ram;
 134     Error *err = NULL;
 135     uint32_t ram_size, vcram_size;
 136     int n;
 137
 138     obj = object_property_get_link(OBJECT(dev), "ram", &err);
 139     if (obj == NULL) {
 140         error_setg(errp, "%s: required ram link not found: %s",
 141                    __func__, error_get_pretty(err));
 142         return;
 143     }
 144
 145     ram = MEMORY_REGION(obj);
 146     ram_size = memory_region_size(ram);
 147
 148     /* Map peripherals and RAM into the GPU address space. */
 149     memory_region_init_alias(&s->peri_mr_alias, OBJECT(s),
 150                              "bcm2835-peripherals", &s->peri_mr, 0,
 151                              memory_region_size(&s->peri_mr));
 152
 153     memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE,
 154                                         &s->peri_mr_alias, 1);
 155
 156     /* RAM is aliased four times (different cache configurations) on the GPU */
 157     for (n = 0; n < 4; n++) {
 158         memory_region_init_alias(&s->ram_alias[n], OBJECT(s),
 159                                  "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size);
 160         memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30,
 161                                             &s->ram_alias[n], 0);
 162     }
 163
 164     /* Interrupt Controller */
 165     object_property_set_bool(OBJECT(&s->ic), true, "realized", &err);
 166     if (err) {
 167         error_propagate(errp, err);
 168         return;
 169     }
 170
 171     memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET,
 172                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0));
 173     sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic));
 174
 175     /* UART0 */
 176     object_property_set_bool(OBJECT(s->uart0), true, "realized", &err);
 177     if (err) {
 178         error_propagate(errp, err);
 179         return;
 180     }
 181
 182     memory_region_add_subregion(&s->peri_mr, UART0_OFFSET,
 183                                 sysbus_mmio_get_region(s->uart0, 0));
 184     sysbus_connect_irq(s->uart0, 0,
 185         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 186                                INTERRUPT_UART));
 187
 188     /* AUX / UART1 */
 189     object_property_set_bool(OBJECT(&s->aux), true, "realized", &err);
 190     if (err) {
 191         error_propagate(errp, err);
 192         return;
 193     }
 194
 195     memory_region_add_subregion(&s->peri_mr, UART1_OFFSET,
 196                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0));
 197     sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0,
 198         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 199                                INTERRUPT_AUX));
 200
 201     /* System timer */
 202     object_property_set_bool(OBJECT(&s->st), true, "realized", &err);
 203     if (err) {
 204         error_propagate(errp, err);
 205         return;
 206     }
 207
 208     memory_region_add_subregion(&s->peri_mr, ST_OFFSET,
 209                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->st), 0));
 210     sysbus_connect_irq(SYS_BUS_DEVICE(&s->st), 0,
 211         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 212                                INTERRUPT_TIMER0));
 213     sysbus_connect_irq(SYS_BUS_DEVICE(&s->st), 1,
 214         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 215                                INTERRUPT_TIMER1));
 216     sysbus_connect_irq(SYS_BUS_DEVICE(&s->st), 2,
 217         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 218                                INTERRUPT_TIMER2));
 219     sysbus_connect_irq(SYS_BUS_DEVICE(&s->st), 3,
 220         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 221                                INTERRUPT_TIMER3));
 222
 223     /* ARM timer */
 224     object_property_set_bool(OBJECT(&s->timer), true, "realized", &err);
 225     if (err) {
 226         error_propagate(errp, err);
 227         return;
 228     }
 229
 230     memory_region_add_subregion(&s->peri_mr, ARMCTRL_TIMER0_1_OFFSET,
 231                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->timer), 0));
 232     sysbus_connect_irq(SYS_BUS_DEVICE(&s->timer), 0,
 233         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
 234                                INTERRUPT_ARM_TIMER));
 235
 236     /* USB controller */
 237     object_property_set_bool(OBJECT(&s->usb), true, "realized", &err);
 238     if (err) {
 239         error_propagate(errp, err);
 240         return;
 241     }
 242
 243     memory_region_add_subregion(&s->peri_mr, USB_OFFSET,
 244                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->usb), 0));
 245     sysbus_connect_irq(SYS_BUS_DEVICE(&s->usb), 0,
 246         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 247                                INTERRUPT_USB));
 248
 249     /* MPHI - Message-based Parallel Host Interface */
 250     object_property_set_bool(OBJECT(&s->mphi), true, "realized", &err);
 251     if (err) {
 252         error_propagate(errp, err);
 253         return;
 254     }
 255
 256     memory_region_add_subregion(&s->peri_mr, MPHI_OFFSET,
 257                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mphi), 0));
 258     sysbus_connect_irq(SYS_BUS_DEVICE(&s->mphi), 0,
 259         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 260                                INTERRUPT_HOSTPORT));
 261
 262     /* Mailboxes */
 263     object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err);
 264     if (err) {
 265         error_propagate(errp, err);
 266         return;
 267     }
 268
 269     memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET,
 270                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0));
 271     sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0,
 272         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
 273                                INTERRUPT_ARM_MAILBOX));
 274
 275     /* Power management */
 276     object_property_set_bool(OBJECT(&s->power), true, "realized", &err);
 277     if (err) {
 278         error_propagate(errp, err);
 279         return;
 280     }
 281
 282     memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_POWER << MBOX_AS_CHAN_SHIFT,
 283                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->power), 0));
 284     sysbus_connect_irq(SYS_BUS_DEVICE(&s->power), 0,
 285                        qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_POWER));
 286
 287     /* Framebuffer */
 288     vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size",
 289                                                    &err);
 290     if (err) {
 291         error_propagate(errp, err);
 292         return;
 293     }
 294
 295     object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size,
 296                             "vcram-base", &err);
 297     if (err) {
 298         error_propagate(errp, err);
 299         return;
 300     }
 301
 302     object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
 303     if (err) {
 304         error_propagate(errp, err);
 305         return;
 306     }
 307
 308     memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT,
 309                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0));
 310     sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0,
 311                        qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
 312
 313     /* Property channel */
 314     object_property_set_bool(OBJECT(&s->property), true, "realized", &err);
 315     if (err) {
 316         error_propagate(errp, err);
 317         return;
 318     }
 319
 320     memory_region_add_subregion(&s->mbox_mr,
 321                 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT,
 322                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0));
 323     sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0,
 324                       qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY));
 325
 326     /* Extended Mass Media Controller */
 327     object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg",
 328                             &err);
 329     if (err) {
 330         error_propagate(errp, err);
 331         return;
 332     }
 333
 334     object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk",
 335                              &err);
 336     if (err) {
 337         error_propagate(errp, err);
 338         return;
 339     }
 340
 341     object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
 342     if (err) {
 343         error_propagate(errp, err);
 344         return;
 345     }
 346
 347     memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET,
 348                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0));
 349     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0,
 350         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 351                                INTERRUPT_ARASANSDIO));
 352     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->sdhci), "sd-bus",
 353                               &err);
 354     if (err) {
 355         error_propagate(errp, err);
 356         return;
 357     }
 358
 359     /* DMA Channels */
 360     object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
 361     if (err) {
 362         error_propagate(errp, err);
 363         return;
 364     }
 365
 366     memory_region_add_subregion(&s->peri_mr, DMA_OFFSET,
 367                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0));
 368     memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET,
 369                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1));
 370
 371     for (n = 0; n <= 12; n++) {
 372         sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n,
 373                            qdev_get_gpio_in_named(DEVICE(&s->ic),
 374                                                   BCM2835_IC_GPU_IRQ,
 375                                                   INTERRUPT_DMA0 + n));
 376     }
 377 }
 378
 379 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
 380 {
 381     DeviceClass *dc = DEVICE_CLASS(oc);
 382
 383     dc->realize = bcm2835_peripherals_realize;
 384 }
 385
 386 static const TypeInfo bcm2835_peripherals_type_info = {
 387     .name = TYPE_BCM2835_PERIPHERALS,
 388     .parent = TYPE_SYS_BUS_DEVICE,
 389     .instance_size = sizeof(BCM2835PeripheralState),
 390     .instance_init = bcm2835_peripherals_init,
 391     .class_init = bcm2835_peripherals_class_init,
 392 };
 393
 394 static void bcm2835_peripherals_register_types(void)
 395 {
 396     type_register_static(&bcm2835_peripherals_type_info);
 397 }
 398
 399 type_init(bcm2835_peripherals_register_types)