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
  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     /* 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
 102 static 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
 290 static 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
 299 static 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
 307 static void bcm2835_peripherals_register_types(void)
 308 {
 309     type_register_static(&bcm2835_peripherals_type_info);
 310 }
 311
 312 type_init(bcm2835_peripherals_register_types)