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/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 0x52034b4
  23
  24 static 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
 122 static 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_hds[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_hds[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     object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg",
 259                             &err);
 260     if (err) {
 261         error_propagate(errp, err);
 262         return;
 263     }
 264
 265     object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk",
 266                              &err);
 267     if (err) {
 268         error_propagate(errp, err);
 269         return;
 270     }
 271
 272     object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
 273     if (err) {
 274         error_propagate(errp, err);
 275         return;
 276     }
 277
 278     memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET,
 279                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0));
 280     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0,
 281         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 282                                INTERRUPT_ARASANSDIO));
 283
 284     /* SDHOST */
 285     object_property_set_bool(OBJECT(&s->sdhost), true, "realized", &err);
 286     if (err) {
 287         error_propagate(errp, err);
 288         return;
 289     }
 290
 291     memory_region_add_subregion(&s->peri_mr, MMCI0_OFFSET,
 292                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhost), 0));
 293     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhost), 0,
 294         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 295                                INTERRUPT_SDIO));
 296
 297     /* DMA Channels */
 298     object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
 299     if (err) {
 300         error_propagate(errp, err);
 301         return;
 302     }
 303
 304     memory_region_add_subregion(&s->peri_mr, DMA_OFFSET,
 305                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0));
 306     memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET,
 307                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1));
 308
 309     for (n = 0; n <= 12; n++) {
 310         sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n,
 311                            qdev_get_gpio_in_named(DEVICE(&s->ic),
 312                                                   BCM2835_IC_GPU_IRQ,
 313                                                   INTERRUPT_DMA0 + n));
 314     }
 315
 316     /* GPIO */
 317     object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err);
 318     if (err) {
 319         error_propagate(errp, err);
 320         return;
 321     }
 322
 323     memory_region_add_subregion(&s->peri_mr, GPIO_OFFSET,
 324                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gpio), 0));
 325
 326     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->gpio), "sd-bus",
 327                               &err);
 328     if (err) {
 329         error_propagate(errp, err);
 330         return;
 331     }
 332 }
 333
 334 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
 335 {
 336     DeviceClass *dc = DEVICE_CLASS(oc);
 337
 338     dc->realize = bcm2835_peripherals_realize;
 339 }
 340
 341 static const TypeInfo bcm2835_peripherals_type_info = {
 342     .name = TYPE_BCM2835_PERIPHERALS,
 343     .parent = TYPE_SYS_BUS_DEVICE,
 344     .instance_size = sizeof(BCM2835PeripheralState),
 345     .instance_init = bcm2835_peripherals_init,
 346     .class_init = bcm2835_peripherals_class_init,
 347 };
 348
 349 static void bcm2835_peripherals_register_types(void)
 350 {
 351     type_register_static(&bcm2835_peripherals_type_info);
 352 }
 353
 354 type_init(bcm2835_peripherals_register_types)