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 "qemu/module.h"
  14 #include "hw/arm/bcm2835_peripherals.h"
  15 #include "hw/misc/bcm2835_mbox_defs.h"
  16 #include "hw/arm/raspi_platform.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 0x52134b4
  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     sysbus_init_child_obj(obj, "ic", &s->ic, sizeof(s->ic), TYPE_BCM2835_IC);
  46
  47     /* UART0 */
  48     sysbus_init_child_obj(obj, "uart0", &s->uart0, sizeof(s->uart0),
  49                           TYPE_PL011);
  50
  51     /* AUX / UART1 */
  52     sysbus_init_child_obj(obj, "aux", &s->aux, sizeof(s->aux),
  53                           TYPE_BCM2835_AUX);
  54
  55     /* Mailboxes */
  56     sysbus_init_child_obj(obj, "mbox", &s->mboxes, sizeof(s->mboxes),
  57                           TYPE_BCM2835_MBOX);
  58
  59     object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr",
  60                                    OBJECT(&s->mbox_mr), &error_abort);
  61
  62     /* Framebuffer */
  63     sysbus_init_child_obj(obj, "fb", &s->fb, sizeof(s->fb), TYPE_BCM2835_FB);
  64     object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size",
  65                               &error_abort);
  66
  67     object_property_add_const_link(OBJECT(&s->fb), "dma-mr",
  68                                    OBJECT(&s->gpu_bus_mr), &error_abort);
  69
  70     /* Property channel */
  71     sysbus_init_child_obj(obj, "property", &s->property, sizeof(s->property),
  72                           TYPE_BCM2835_PROPERTY);
  73     object_property_add_alias(obj, "board-rev", OBJECT(&s->property),
  74                               "board-rev", &error_abort);
  75
  76     object_property_add_const_link(OBJECT(&s->property), "fb",
  77                                    OBJECT(&s->fb), &error_abort);
  78     object_property_add_const_link(OBJECT(&s->property), "dma-mr",
  79                                    OBJECT(&s->gpu_bus_mr), &error_abort);
  80
  81     /* Random Number Generator */
  82     sysbus_init_child_obj(obj, "rng", &s->rng, sizeof(s->rng),
  83                           TYPE_BCM2835_RNG);
  84
  85     /* Extended Mass Media Controller */
  86     sysbus_init_child_obj(obj, "sdhci", &s->sdhci, sizeof(s->sdhci),
  87                           TYPE_SYSBUS_SDHCI);
  88
  89     /* SDHOST */
  90     sysbus_init_child_obj(obj, "sdhost", &s->sdhost, sizeof(s->sdhost),
  91                           TYPE_BCM2835_SDHOST);
  92
  93     /* DMA Channels */
  94     sysbus_init_child_obj(obj, "dma", &s->dma, sizeof(s->dma),
  95                           TYPE_BCM2835_DMA);
  96
  97     object_property_add_const_link(OBJECT(&s->dma), "dma-mr",
  98                                    OBJECT(&s->gpu_bus_mr), &error_abort);
  99
 100     /* GPIO */
 101     sysbus_init_child_obj(obj, "gpio", &s->gpio, sizeof(s->gpio),
 102                           TYPE_BCM2835_GPIO);
 103
 104     object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhci",
 105                                    OBJECT(&s->sdhci.sdbus), &error_abort);
 106     object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhost",
 107                                    OBJECT(&s->sdhost.sdbus), &error_abort);
 108 }
 109
 110 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
 111 {
 112     BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev);
 113     Object *obj;
 114     MemoryRegion *ram;
 115     Error *err = NULL;
 116     uint64_t ram_size, vcram_size;
 117     int n;
 118
 119     obj = object_property_get_link(OBJECT(dev), "ram", &err);
 120     if (obj == NULL) {
 121         error_setg(errp, "%s: required ram link not found: %s",
 122                    __func__, error_get_pretty(err));
 123         return;
 124     }
 125
 126     ram = MEMORY_REGION(obj);
 127     ram_size = memory_region_size(ram);
 128
 129     /* Map peripherals and RAM into the GPU address space. */
 130     memory_region_init_alias(&s->peri_mr_alias, OBJECT(s),
 131                              "bcm2835-peripherals", &s->peri_mr, 0,
 132                              memory_region_size(&s->peri_mr));
 133
 134     memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE,
 135                                         &s->peri_mr_alias, 1);
 136
 137     /* RAM is aliased four times (different cache configurations) on the GPU */
 138     for (n = 0; n < 4; n++) {
 139         memory_region_init_alias(&s->ram_alias[n], OBJECT(s),
 140                                  "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size);
 141         memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30,
 142                                             &s->ram_alias[n], 0);
 143     }
 144
 145     /* Interrupt Controller */
 146     object_property_set_bool(OBJECT(&s->ic), true, "realized", &err);
 147     if (err) {
 148         error_propagate(errp, err);
 149         return;
 150     }
 151
 152     memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET,
 153                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0));
 154     sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic));
 155
 156     /* UART0 */
 157     qdev_prop_set_chr(DEVICE(&s->uart0), "chardev", serial_hd(0));
 158     object_property_set_bool(OBJECT(&s->uart0), true, "realized", &err);
 159     if (err) {
 160         error_propagate(errp, err);
 161         return;
 162     }
 163
 164     memory_region_add_subregion(&s->peri_mr, UART0_OFFSET,
 165                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->uart0), 0));
 166     sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart0), 0,
 167         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 168                                INTERRUPT_UART));
 169     /* AUX / UART1 */
 170     qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hd(1));
 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 = object_property_get_uint(OBJECT(s), "vcram-size", &err);
 199     if (err) {
 200         error_propagate(errp, err);
 201         return;
 202     }
 203
 204     object_property_set_uint(OBJECT(&s->fb), ram_size - vcram_size,
 205                              "vcram-base", &err);
 206     if (err) {
 207         error_propagate(errp, err);
 208         return;
 209     }
 210
 211     object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
 212     if (err) {
 213         error_propagate(errp, err);
 214         return;
 215     }
 216
 217     memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT,
 218                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0));
 219     sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0,
 220                        qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
 221
 222     /* Property channel */
 223     object_property_set_bool(OBJECT(&s->property), true, "realized", &err);
 224     if (err) {
 225         error_propagate(errp, err);
 226         return;
 227     }
 228
 229     memory_region_add_subregion(&s->mbox_mr,
 230                 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT,
 231                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0));
 232     sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0,
 233                       qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY));
 234
 235     /* Random Number Generator */
 236     object_property_set_bool(OBJECT(&s->rng), true, "realized", &err);
 237     if (err) {
 238         error_propagate(errp, err);
 239         return;
 240     }
 241
 242     memory_region_add_subregion(&s->peri_mr, RNG_OFFSET,
 243                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng), 0));
 244
 245     /* Extended Mass Media Controller
 246      *
 247      * Compatible with:
 248      * - SD Host Controller Specification Version 3.0 Draft 1.0
 249      * - SDIO Specification Version 3.0
 250      * - MMC Specification Version 4.4
 251      *
 252      * For the exact details please refer to the Arasan documentation:
 253      *   SD3.0_Host_AHB_eMMC4.4_Usersguide_ver5.9_jan11_10.pdf
 254      */
 255     object_property_set_uint(OBJECT(&s->sdhci), 3, "sd-spec-version", &err);
 256     object_property_set_uint(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg",
 257                              &err);
 258     object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk",
 259                              &err);
 260     if (err) {
 261         error_propagate(errp, err);
 262         return;
 263     }
 264
 265     object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
 266     if (err) {
 267         error_propagate(errp, err);
 268         return;
 269     }
 270
 271     memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET,
 272                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0));
 273     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0,
 274         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 275                                INTERRUPT_ARASANSDIO));
 276
 277     /* SDHOST */
 278     object_property_set_bool(OBJECT(&s->sdhost), true, "realized", &err);
 279     if (err) {
 280         error_propagate(errp, err);
 281         return;
 282     }
 283
 284     memory_region_add_subregion(&s->peri_mr, MMCI0_OFFSET,
 285                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhost), 0));
 286     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhost), 0,
 287         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 288                                INTERRUPT_SDIO));
 289
 290     /* DMA Channels */
 291     object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
 292     if (err) {
 293         error_propagate(errp, err);
 294         return;
 295     }
 296
 297     memory_region_add_subregion(&s->peri_mr, DMA_OFFSET,
 298                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0));
 299     memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET,
 300                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1));
 301
 302     for (n = 0; n <= 12; n++) {
 303         sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n,
 304                            qdev_get_gpio_in_named(DEVICE(&s->ic),
 305                                                   BCM2835_IC_GPU_IRQ,
 306                                                   INTERRUPT_DMA0 + n));
 307     }
 308
 309     /* GPIO */
 310     object_property_set_bool(OBJECT(&s->gpio), true, "realized", &err);
 311     if (err) {
 312         error_propagate(errp, err);
 313         return;
 314     }
 315
 316     memory_region_add_subregion(&s->peri_mr, GPIO_OFFSET,
 317                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gpio), 0));
 318
 319     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->gpio), "sd-bus",
 320                               &err);
 321     if (err) {
 322         error_propagate(errp, err);
 323         return;
 324     }
 325 }
 326
 327 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
 328 {
 329     DeviceClass *dc = DEVICE_CLASS(oc);
 330
 331     dc->realize = bcm2835_peripherals_realize;
 332 }
 333
 334 static const TypeInfo bcm2835_peripherals_type_info = {
 335     .name = TYPE_BCM2835_PERIPHERALS,
 336     .parent = TYPE_SYS_BUS_DEVICE,
 337     .instance_size = sizeof(BCM2835PeripheralState),
 338     .instance_init = bcm2835_peripherals_init,
 339     .class_init = bcm2835_peripherals_class_init,
 340 };
 341
 342 static void bcm2835_peripherals_register_types(void)
 343 {
 344     type_register_static(&bcm2835_peripherals_type_info);
 345 }
 346
 347 type_init(bcm2835_peripherals_register_types)