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 #include "sysemu/char.h"
  16
  17 /* Peripheral base address on the VC (GPU) system bus */
  18 #define BCM2835_VC_PERI_BASE 0x7e000000
  19
  20 /* Capabilities for SD controller: no DMA, high-speed, default clocks etc. */
  21 #define BCM2835_SDHC_CAPAREG 0x52034b4
  22
  23 static void bcm2835_peripherals_init(Object *obj)
  24 {
  25     BCM2835PeripheralState *s = BCM2835_PERIPHERALS(obj);
  26
  27     /* Memory region for peripheral devices, which we export to our parent */
  28     memory_region_init(&s->peri_mr, obj,"bcm2835-peripherals", 0x1000000);
  29     object_property_add_child(obj, "peripheral-io", OBJECT(&s->peri_mr), NULL);
  30     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_mr);
  31
  32     /* Internal memory region for peripheral bus addresses (not exported) */
  33     memory_region_init(&s->gpu_bus_mr, obj, "bcm2835-gpu", (uint64_t)1 << 32);
  34     object_property_add_child(obj, "gpu-bus", OBJECT(&s->gpu_bus_mr), NULL);
  35
  36     /* Internal memory region for request/response communication with
  37      * mailbox-addressable peripherals (not exported)
  38      */
  39     memory_region_init(&s->mbox_mr, obj, "bcm2835-mbox",
  40                        MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT);
  41
  42     /* Interrupt Controller */
  43     object_initialize(&s->ic, sizeof(s->ic), TYPE_BCM2835_IC);
  44     object_property_add_child(obj, "ic", OBJECT(&s->ic), NULL);
  45     qdev_set_parent_bus(DEVICE(&s->ic), sysbus_get_default());
  46
  47     /* UART0 */
  48     s->uart0 = SYS_BUS_DEVICE(object_new("pl011"));
  49     object_property_add_child(obj, "uart0", OBJECT(s->uart0), NULL);
  50     qdev_set_parent_bus(DEVICE(s->uart0), sysbus_get_default());
  51
  52     /* AUX / UART1 */
  53     object_initialize(&s->aux, sizeof(s->aux), TYPE_BCM2835_AUX);
  54     object_property_add_child(obj, "aux", OBJECT(&s->aux), NULL);
  55     qdev_set_parent_bus(DEVICE(&s->aux), sysbus_get_default());
  56
  57     /* Mailboxes */
  58     object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX);
  59     object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL);
  60     qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default());
  61
  62     object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr",
  63                                    OBJECT(&s->mbox_mr), &error_abort);
  64
  65     /* Framebuffer */
  66     object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB);
  67     object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL);
  68     object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size",
  69                               &error_abort);
  70     qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default());
  71
  72     object_property_add_const_link(OBJECT(&s->fb), "dma-mr",
  73                                    OBJECT(&s->gpu_bus_mr), &error_abort);
  74
  75     /* Property channel */
  76     object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY);
  77     object_property_add_child(obj, "property", OBJECT(&s->property), NULL);
  78     object_property_add_alias(obj, "board-rev", OBJECT(&s->property),
  79                               "board-rev", &error_abort);
  80     qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default());
  81
  82     object_property_add_const_link(OBJECT(&s->property), "fb",
  83                                    OBJECT(&s->fb), &error_abort);
  84     object_property_add_const_link(OBJECT(&s->property), "dma-mr",
  85                                    OBJECT(&s->gpu_bus_mr), &error_abort);
  86
  87     /* Extended Mass Media Controller */
  88     object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI);
  89     object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL);
  90     qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default());
  91
  92     /* DMA Channels */
  93     object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA);
  94     object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL);
  95     qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default());
  96
  97     object_property_add_const_link(OBJECT(&s->dma), "dma-mr",
  98                                    OBJECT(&s->gpu_bus_mr), &error_abort);
  99 }
 100
 101 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
 102 {
 103     BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev);
 104     Object *obj;
 105     MemoryRegion *ram;
 106     Error *err = NULL;
 107     uint32_t ram_size, vcram_size;
 108     CharDriverState *chr;
 109     int n;
 110
 111     obj = object_property_get_link(OBJECT(dev), "ram", &err);
 112     if (obj == NULL) {
 113         error_setg(errp, "%s: required ram link not found: %s",
 114                    __func__, error_get_pretty(err));
 115         return;
 116     }
 117
 118     ram = MEMORY_REGION(obj);
 119     ram_size = memory_region_size(ram);
 120
 121     /* Map peripherals and RAM into the GPU address space. */
 122     memory_region_init_alias(&s->peri_mr_alias, OBJECT(s),
 123                              "bcm2835-peripherals", &s->peri_mr, 0,
 124                              memory_region_size(&s->peri_mr));
 125
 126     memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE,
 127                                         &s->peri_mr_alias, 1);
 128
 129     /* RAM is aliased four times (different cache configurations) on the GPU */
 130     for (n = 0; n < 4; n++) {
 131         memory_region_init_alias(&s->ram_alias[n], OBJECT(s),
 132                                  "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size);
 133         memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30,
 134                                             &s->ram_alias[n], 0);
 135     }
 136
 137     /* Interrupt Controller */
 138     object_property_set_bool(OBJECT(&s->ic), true, "realized", &err);
 139     if (err) {
 140         error_propagate(errp, err);
 141         return;
 142     }
 143
 144     memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET,
 145                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0));
 146     sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic));
 147
 148     /* UART0 */
 149     object_property_set_bool(OBJECT(s->uart0), true, "realized", &err);
 150     if (err) {
 151         error_propagate(errp, err);
 152         return;
 153     }
 154
 155     memory_region_add_subregion(&s->peri_mr, UART0_OFFSET,
 156                                 sysbus_mmio_get_region(s->uart0, 0));
 157     sysbus_connect_irq(s->uart0, 0,
 158         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 159                                INTERRUPT_UART));
 160
 161     /* AUX / UART1 */
 162     /* TODO: don't call qemu_char_get_next_serial() here, instead set
 163      * chardev properties for each uart at the board level, once pl011
 164      * (uart0) has been updated to avoid qemu_char_get_next_serial()
 165      */
 166     chr = qemu_char_get_next_serial();
 167     if (chr == NULL) {
 168         chr = qemu_chr_new("bcm2835.uart1", "null", NULL);
 169     }
 170     qdev_prop_set_chr(DEVICE(&s->aux), "chardev", chr);
 171
 172     object_property_set_bool(OBJECT(&s->aux), true, "realized", &err);
 173     if (err) {
 174         error_propagate(errp, err);
 175         return;
 176     }
 177
 178     memory_region_add_subregion(&s->peri_mr, UART1_OFFSET,
 179                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0));
 180     sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0,
 181         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 182                                INTERRUPT_AUX));
 183
 184     /* Mailboxes */
 185     object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err);
 186     if (err) {
 187         error_propagate(errp, err);
 188         return;
 189     }
 190
 191     memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET,
 192                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0));
 193     sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0,
 194         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
 195                                INTERRUPT_ARM_MAILBOX));
 196
 197     /* Framebuffer */
 198     vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size",
 199                                                    &err);
 200     if (err) {
 201         error_propagate(errp, err);
 202         return;
 203     }
 204
 205     object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size,
 206                             "vcram-base", &err);
 207     if (err) {
 208         error_propagate(errp, err);
 209         return;
 210     }
 211
 212     object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
 213     if (err) {
 214         error_propagate(errp, err);
 215         return;
 216     }
 217
 218     memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT,
 219                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0));
 220     sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0,
 221                        qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
 222
 223     /* Property channel */
 224     object_property_set_bool(OBJECT(&s->property), true, "realized", &err);
 225     if (err) {
 226         error_propagate(errp, err);
 227         return;
 228     }
 229
 230     memory_region_add_subregion(&s->mbox_mr,
 231                 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT,
 232                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0));
 233     sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0,
 234                       qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY));
 235
 236     /* Extended Mass Media Controller */
 237     object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg",
 238                             &err);
 239     if (err) {
 240         error_propagate(errp, err);
 241         return;
 242     }
 243
 244     object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk",
 245                              &err);
 246     if (err) {
 247         error_propagate(errp, err);
 248         return;
 249     }
 250
 251     object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
 252     if (err) {
 253         error_propagate(errp, err);
 254         return;
 255     }
 256
 257     memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET,
 258                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0));
 259     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0,
 260         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 261                                INTERRUPT_ARASANSDIO));
 262     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->sdhci), "sd-bus",
 263                               &err);
 264     if (err) {
 265         error_propagate(errp, err);
 266         return;
 267     }
 268
 269     /* DMA Channels */
 270     object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
 271     if (err) {
 272         error_propagate(errp, err);
 273         return;
 274     }
 275
 276     memory_region_add_subregion(&s->peri_mr, DMA_OFFSET,
 277                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0));
 278     memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET,
 279                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1));
 280
 281     for (n = 0; n <= 12; n++) {
 282         sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n,
 283                            qdev_get_gpio_in_named(DEVICE(&s->ic),
 284                                                   BCM2835_IC_GPU_IRQ,
 285                                                   INTERRUPT_DMA0 + n));
 286     }
 287 }
 288
 289 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
 290 {
 291     DeviceClass *dc = DEVICE_CLASS(oc);
 292
 293     dc->realize = bcm2835_peripherals_realize;
 294     /* Reason: realize() method uses qemu_char_get_next_serial() */
 295     dc->cannot_instantiate_with_device_add_yet = true;
 296 }
 297
 298 static const TypeInfo bcm2835_peripherals_type_info = {
 299     .name = TYPE_BCM2835_PERIPHERALS,
 300     .parent = TYPE_SYS_BUS_DEVICE,
 301     .instance_size = sizeof(BCM2835PeripheralState),
 302     .instance_init = bcm2835_peripherals_init,
 303     .class_init = bcm2835_peripherals_class_init,
 304 };
 305
 306 static void bcm2835_peripherals_register_types(void)
 307 {
 308     type_register_static(&bcm2835_peripherals_type_info);
 309 }
 310
 311 type_init(bcm2835_peripherals_register_types)