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