/* * Raspberry Pi emulation (c) 2012 Gregory Estrade * Upstreaming code cleanup [including bcm2835_*] (c) 2013 Jan Petrous * * Rasperry Pi 2 emulation and refactoring Copyright (c) 2015, Microsoft * Written by Andrew Baumann * * This code is licensed under the GNU GPLv2 and later. */ #include "qemu/osdep.h" #include "qapi/error.h" #include "hw/arm/bcm2835_peripherals.h" #include "hw/misc/bcm2835_mbox_defs.h" #include "hw/arm/raspi_platform.h" #include "sysemu/char.h" #include "sysemu/sysemu.h" /* Peripheral base address on the VC (GPU) system bus */ #define BCM2835_VC_PERI_BASE 0x7e000000 /* Capabilities for SD controller: no DMA, high-speed, default clocks etc. */ #define BCM2835_SDHC_CAPAREG 0x52034b4 static void bcm2835_peripherals_init(Object *obj) { BCM2835PeripheralState *s = BCM2835_PERIPHERALS(obj); /* Memory region for peripheral devices, which we export to our parent */ memory_region_init(&s->peri_mr, obj,"bcm2835-peripherals", 0x1000000); object_property_add_child(obj, "peripheral-io", OBJECT(&s->peri_mr), NULL); sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_mr); /* Internal memory region for peripheral bus addresses (not exported) */ memory_region_init(&s->gpu_bus_mr, obj, "bcm2835-gpu", (uint64_t)1 << 32); object_property_add_child(obj, "gpu-bus", OBJECT(&s->gpu_bus_mr), NULL); /* Internal memory region for request/response communication with * mailbox-addressable peripherals (not exported) */ memory_region_init(&s->mbox_mr, obj, "bcm2835-mbox", MBOX_CHAN_COUNT << MBOX_AS_CHAN_SHIFT); /* Interrupt Controller */ object_initialize(&s->ic, sizeof(s->ic), TYPE_BCM2835_IC); object_property_add_child(obj, "ic", OBJECT(&s->ic), NULL); qdev_set_parent_bus(DEVICE(&s->ic), sysbus_get_default()); /* UART0 */ s->uart0 = SYS_BUS_DEVICE(object_new("pl011")); object_property_add_child(obj, "uart0", OBJECT(s->uart0), NULL); qdev_set_parent_bus(DEVICE(s->uart0), sysbus_get_default()); /* AUX / UART1 */ object_initialize(&s->aux, sizeof(s->aux), TYPE_BCM2835_AUX); object_property_add_child(obj, "aux", OBJECT(&s->aux), NULL); qdev_set_parent_bus(DEVICE(&s->aux), sysbus_get_default()); /* Mailboxes */ object_initialize(&s->mboxes, sizeof(s->mboxes), TYPE_BCM2835_MBOX); object_property_add_child(obj, "mbox", OBJECT(&s->mboxes), NULL); qdev_set_parent_bus(DEVICE(&s->mboxes), sysbus_get_default()); object_property_add_const_link(OBJECT(&s->mboxes), "mbox-mr", OBJECT(&s->mbox_mr), &error_abort); /* Framebuffer */ object_initialize(&s->fb, sizeof(s->fb), TYPE_BCM2835_FB); object_property_add_child(obj, "fb", OBJECT(&s->fb), NULL); object_property_add_alias(obj, "vcram-size", OBJECT(&s->fb), "vcram-size", &error_abort); qdev_set_parent_bus(DEVICE(&s->fb), sysbus_get_default()); object_property_add_const_link(OBJECT(&s->fb), "dma-mr", OBJECT(&s->gpu_bus_mr), &error_abort); /* Property channel */ object_initialize(&s->property, sizeof(s->property), TYPE_BCM2835_PROPERTY); object_property_add_child(obj, "property", OBJECT(&s->property), NULL); object_property_add_alias(obj, "board-rev", OBJECT(&s->property), "board-rev", &error_abort); qdev_set_parent_bus(DEVICE(&s->property), sysbus_get_default()); object_property_add_const_link(OBJECT(&s->property), "fb", OBJECT(&s->fb), &error_abort); object_property_add_const_link(OBJECT(&s->property), "dma-mr", OBJECT(&s->gpu_bus_mr), &error_abort); /* Random Number Generator */ object_initialize(&s->rng, sizeof(s->rng), TYPE_BCM2835_RNG); object_property_add_child(obj, "rng", OBJECT(&s->rng), NULL); qdev_set_parent_bus(DEVICE(&s->rng), sysbus_get_default()); /* Extended Mass Media Controller */ object_initialize(&s->sdhci, sizeof(s->sdhci), TYPE_SYSBUS_SDHCI); object_property_add_child(obj, "sdhci", OBJECT(&s->sdhci), NULL); qdev_set_parent_bus(DEVICE(&s->sdhci), sysbus_get_default()); /* DMA Channels */ object_initialize(&s->dma, sizeof(s->dma), TYPE_BCM2835_DMA); object_property_add_child(obj, "dma", OBJECT(&s->dma), NULL); qdev_set_parent_bus(DEVICE(&s->dma), sysbus_get_default()); object_property_add_const_link(OBJECT(&s->dma), "dma-mr", OBJECT(&s->gpu_bus_mr), &error_abort); } static void bcm2835_peripherals_realize(DeviceState *dev, Error **errp) { BCM2835PeripheralState *s = BCM2835_PERIPHERALS(dev); Object *obj; MemoryRegion *ram; Error *err = NULL; uint32_t ram_size, vcram_size; int n; obj = object_property_get_link(OBJECT(dev), "ram", &err); if (obj == NULL) { error_setg(errp, "%s: required ram link not found: %s", __func__, error_get_pretty(err)); return; } ram = MEMORY_REGION(obj); ram_size = memory_region_size(ram); /* Map peripherals and RAM into the GPU address space. */ memory_region_init_alias(&s->peri_mr_alias, OBJECT(s), "bcm2835-peripherals", &s->peri_mr, 0, memory_region_size(&s->peri_mr)); memory_region_add_subregion_overlap(&s->gpu_bus_mr, BCM2835_VC_PERI_BASE, &s->peri_mr_alias, 1); /* RAM is aliased four times (different cache configurations) on the GPU */ for (n = 0; n < 4; n++) { memory_region_init_alias(&s->ram_alias[n], OBJECT(s), "bcm2835-gpu-ram-alias[*]", ram, 0, ram_size); memory_region_add_subregion_overlap(&s->gpu_bus_mr, (hwaddr)n << 30, &s->ram_alias[n], 0); } /* Interrupt Controller */ object_property_set_bool(OBJECT(&s->ic), true, "realized", &err); if (err) { error_propagate(errp, err); return; } memory_region_add_subregion(&s->peri_mr, ARMCTRL_IC_OFFSET, sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->ic), 0)); sysbus_pass_irq(SYS_BUS_DEVICE(s), SYS_BUS_DEVICE(&s->ic)); /* UART0 */ qdev_prop_set_chr(DEVICE(s->uart0), "chardev", serial_hds[0]); object_property_set_bool(OBJECT(s->uart0), true, "realized", &err); if (err) { error_propagate(errp, err); return; } memory_region_add_subregion(&s->peri_mr, UART0_OFFSET, sysbus_mmio_get_region(s->uart0, 0)); sysbus_connect_irq(s->uart0, 0, qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, INTERRUPT_UART)); /* AUX / UART1 */ qdev_prop_set_chr(DEVICE(&s->aux), "chardev", serial_hds[1]); object_property_set_bool(OBJECT(&s->aux), true, "realized", &err); if (err) { error_propagate(errp, err); return; } memory_region_add_subregion(&s->peri_mr, UART1_OFFSET, sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->aux), 0)); sysbus_connect_irq(SYS_BUS_DEVICE(&s->aux), 0, qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, INTERRUPT_AUX)); /* Mailboxes */ object_property_set_bool(OBJECT(&s->mboxes), true, "realized", &err); if (err) { error_propagate(errp, err); return; } memory_region_add_subregion(&s->peri_mr, ARMCTRL_0_SBM_OFFSET, sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->mboxes), 0)); sysbus_connect_irq(SYS_BUS_DEVICE(&s->mboxes), 0, qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_ARM_IRQ, INTERRUPT_ARM_MAILBOX)); /* Framebuffer */ vcram_size = (uint32_t)object_property_get_int(OBJECT(s), "vcram-size", &err); if (err) { error_propagate(errp, err); return; } object_property_set_int(OBJECT(&s->fb), ram_size - vcram_size, "vcram-base", &err); if (err) { error_propagate(errp, err); return; } object_property_set_bool(OBJECT(&s->fb), true, "realized", &err); if (err) { error_propagate(errp, err); return; } memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_FB << MBOX_AS_CHAN_SHIFT, sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->fb), 0)); sysbus_connect_irq(SYS_BUS_DEVICE(&s->fb), 0, qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_FB)); /* Property channel */ object_property_set_bool(OBJECT(&s->property), true, "realized", &err); if (err) { error_propagate(errp, err); return; } memory_region_add_subregion(&s->mbox_mr, MBOX_CHAN_PROPERTY << MBOX_AS_CHAN_SHIFT, sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->property), 0)); sysbus_connect_irq(SYS_BUS_DEVICE(&s->property), 0, qdev_get_gpio_in(DEVICE(&s->mboxes), MBOX_CHAN_PROPERTY)); /* Random Number Generator */ object_property_set_bool(OBJECT(&s->rng), true, "realized", &err); if (err) { error_propagate(errp, err); return; } memory_region_add_subregion(&s->peri_mr, RNG_OFFSET, sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng), 0)); /* Extended Mass Media Controller */ object_property_set_int(OBJECT(&s->sdhci), BCM2835_SDHC_CAPAREG, "capareg", &err); if (err) { error_propagate(errp, err); return; } object_property_set_bool(OBJECT(&s->sdhci), true, "pending-insert-quirk", &err); if (err) { error_propagate(errp, err); return; } object_property_set_bool(OBJECT(&s->sdhci), true, "realized", &err); if (err) { error_propagate(errp, err); return; } memory_region_add_subregion(&s->peri_mr, EMMC_OFFSET, sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->sdhci), 0)); sysbus_connect_irq(SYS_BUS_DEVICE(&s->sdhci), 0, qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, INTERRUPT_ARASANSDIO)); object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->sdhci), "sd-bus", &err); if (err) { error_propagate(errp, err); return; } /* DMA Channels */ object_property_set_bool(OBJECT(&s->dma), true, "realized", &err); if (err) { error_propagate(errp, err); return; } memory_region_add_subregion(&s->peri_mr, DMA_OFFSET, sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 0)); memory_region_add_subregion(&s->peri_mr, DMA15_OFFSET, sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->dma), 1)); for (n = 0; n <= 12; n++) { sysbus_connect_irq(SYS_BUS_DEVICE(&s->dma), n, qdev_get_gpio_in_named(DEVICE(&s->ic), BCM2835_IC_GPU_IRQ, INTERRUPT_DMA0 + n)); } } static void bcm2835_peripherals_class_init(ObjectClass *oc, void *data) { DeviceClass *dc = DEVICE_CLASS(oc); dc->realize = bcm2835_peripherals_realize; } static const TypeInfo bcm2835_peripherals_type_info = { .name = TYPE_BCM2835_PERIPHERALS, .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(BCM2835PeripheralState), .instance_init = bcm2835_peripherals_init, .class_init = bcm2835_peripherals_class_init, }; static void bcm2835_peripherals_register_types(void) { type_register_static(&bcm2835_peripherals_type_info); } type_init(bcm2835_peripherals_register_types)