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     /* Extended Mass Media Controller */
  90     object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI);
  91     object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL);
  92     qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default());
  93
  94     /* DMA Channels */
  95     object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA);
  96     object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL);
  97     qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default());
  98
  99     object_property_add_const_link(OBJECT(&s->dma), "dma-mr",
 100                                    OBJECT(&s->gpu_bus_mr), &error_abort);
 101 }
 102
 103 static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp)
 104 {
 105     BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev);
 106     Object *obj;
 107     MemoryRegion *ram;
 108     Error *err = NULL;
 109     uint32_t ram_size, vcram_size;
 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     qdev_prop_set_chr(DEVICE(s->uart0), "chardev", serial_hds[0]);
 151     object_property_set_bool(OBJECT(s->uart0), true, "realized", &err);
 152     if (err) {
 153         error_propagate(errp, err);
 154         return;
 155     }
 156
 157     memory_region_add_subregion(&s->peri_mr, UART0_OFFSET,
 158                                 sysbus_mmio_get_region(s->uart0, 0));
 159     sysbus_connect_irq(s->uart0, 0,
 160         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 161                                INTERRUPT_UART));
 162     /* AUX / UART1 */
 163     qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hds[1]);
 164
 165     object_property_set_bool(OBJECT(&s->aux), true, "realized", &err);
 166     if (err) {
 167         error_propagate(errp, err);
 168         return;
 169     }
 170
 171     memory_region_add_subregion(&s->peri_mr, UART1_OFFSET,
 172                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0));
 173     sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0,
 174         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 175                                INTERRUPT_AUX));
 176
 177     /* Mailboxes */
 178     object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err);
 179     if (err) {
 180         error_propagate(errp, err);
 181         return;
 182     }
 183
 184     memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET,
 185                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0));
 186     sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0,
 187         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ,
 188                                INTERRUPT_ARM_MAILBOX));
 189
 190     /* Framebuffer */
 191     vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size",
 192                                                    &err);
 193     if (err) {
 194         error_propagate(errp, err);
 195         return;
 196     }
 197
 198     object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size,
 199                             "vcram-base", &err);
 200     if (err) {
 201         error_propagate(errp, err);
 202         return;
 203     }
 204
 205     object_property_set_bool(OBJECT(&s->fb), true, "realized", &err);
 206     if (err) {
 207         error_propagate(errp, err);
 208         return;
 209     }
 210
 211     memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT,
 212                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0));
 213     sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0,
 214                        qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB));
 215
 216     /* Property channel */
 217     object_property_set_bool(OBJECT(&s->property), true, "realized", &err);
 218     if (err) {
 219         error_propagate(errp, err);
 220         return;
 221     }
 222
 223     memory_region_add_subregion(&s->mbox_mr,
 224                 MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT,
 225                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0));
 226     sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0,
 227                       qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY));
 228
 229     /* Extended Mass Media Controller */
 230     object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg",
 231                             &err);
 232     if (err) {
 233         error_propagate(errp, err);
 234         return;
 235     }
 236
 237     object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk",
 238                              &err);
 239     if (err) {
 240         error_propagate(errp, err);
 241         return;
 242     }
 243
 244     object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err);
 245     if (err) {
 246         error_propagate(errp, err);
 247         return;
 248     }
 249
 250     memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET,
 251                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0));
 252     sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0,
 253         qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ,
 254                                INTERRUPT_ARASANSDIO));
 255     object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->sdhci), "sd-bus",
 256                               &err);
 257     if (err) {
 258         error_propagate(errp, err);
 259         return;
 260     }
 261
 262     /* DMA Channels */
 263     object_property_set_bool(OBJECT(&s->dma), true, "realized", &err);
 264     if (err) {
 265         error_propagate(errp, err);
 266         return;
 267     }
 268
 269     memory_region_add_subregion(&s->peri_mr, DMA_OFFSET,
 270                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0));
 271     memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET,
 272                 sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1));
 273
 274     for (n = 0; n <= 12; n++) {
 275         sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n,
 276                            qdev_get_gpio_in_named(DEVICE(&s->ic),
 277                                                   BCM2835_IC_GPU_IRQ,
 278                                                   INTERRUPT_DMA0 + n));
 279     }
 280 }
 281
 282 static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data)
 283 {
 284     DeviceClass *dc = DEVICE_CLASS(oc);
 285
 286     dc->realize = bcm2835_peripherals_realize;
 287 }
 288
 289 static const TypeInfo bcm2835_peripherals_type_info = {
 290     .name = TYPE_BCM2835_PERIPHERALS,
 291     .parent = TYPE_SYS_BUS_DEVICE,
 292     .instance_size = sizeof(BCM2835PeripheralState),
 293     .instance_init = bcm2835_peripherals_init,
 294     .class_init = bcm2835_peripherals_class_init,
 295 };
 296
 297 static void bcm2835_peripherals_register_types(void)
 298 {
 299     type_register_static(&bcm2835_peripherals_type_info);
 300 }
 301
 302 type_init(bcm2835_peripherals_register_types)