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/*
* BCM2838 peripherals emulation
*
* Copyright (C) 2022 Ovchinnikov Vitalii <vitalii.ovchinnikov@auriga.com>
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "hw/arm/raspi_platform.h"
#include "hw/arm/bcm2838_peripherals.h"
#define CLOCK_ISP_OFFSET 0xc11000
#define CLOCK_ISP_SIZE 0x100
/* Lower peripheral base address on the VC (GPU) system bus */
#define BCM2838_VC_PERI_LOW_BASE 0x7c000000
/* Capabilities for SD controller: no DMA, high-speed, default clocks etc. */
#define BCM2835_SDHC_CAPAREG 0x52134b4
static void bcm2838_peripherals_init(Object *obj)
{
BCM2838PeripheralState *s = BCM2838_PERIPHERALS(obj);
BCM2838PeripheralClass *bc = BCM2838_PERIPHERALS_GET_CLASS(obj);
BCMSocPeripheralBaseState *s_base = BCM_SOC_PERIPHERALS_BASE(obj);
/* Lower memory region for peripheral devices (exported to the Soc) */
memory_region_init(&s->peri_low_mr, obj, "bcm2838-peripherals",
bc->peri_low_size);
sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_low_mr);
/* Extended Mass Media Controller 2 */
object_initialize_child(obj, "emmc2", &s->emmc2, TYPE_SYSBUS_SDHCI);
/* GPIO */
object_initialize_child(obj, "gpio", &s->gpio, TYPE_BCM2838_GPIO);
object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhci",
OBJECT(&s_base->sdhci.sdbus));
object_property_add_const_link(OBJECT(&s->gpio), "sdbus-sdhost",
OBJECT(&s_base->sdhost.sdbus));
object_initialize_child(obj, "mmc_irq_orgate", &s->mmc_irq_orgate,
TYPE_OR_IRQ);
object_property_set_int(OBJECT(&s->mmc_irq_orgate), "num-lines", 2,
&error_abort);
object_initialize_child(obj, "dma_7_8_irq_orgate", &s->dma_7_8_irq_orgate,
TYPE_OR_IRQ);
object_property_set_int(OBJECT(&s->dma_7_8_irq_orgate), "num-lines", 2,
&error_abort);
object_initialize_child(obj, "dma_9_10_irq_orgate", &s->dma_9_10_irq_orgate,
TYPE_OR_IRQ);
object_property_set_int(OBJECT(&s->dma_9_10_irq_orgate), "num-lines", 2,
&error_abort);
}
static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp)
{
DeviceState *mmc_irq_orgate;
DeviceState *dma_7_8_irq_orgate;
DeviceState *dma_9_10_irq_orgate;
MemoryRegion *mphi_mr;
BCM2838PeripheralState *s = BCM2838_PERIPHERALS(dev);
BCMSocPeripheralBaseState *s_base = BCM_SOC_PERIPHERALS_BASE(dev);
int n;
bcm_soc_peripherals_common_realize(dev, errp);
/* Map lower peripherals into the GPU address space */
memory_region_init_alias(&s->peri_low_mr_alias, OBJECT(s),
"bcm2838-peripherals", &s->peri_low_mr, 0,
memory_region_size(&s->peri_low_mr));
memory_region_add_subregion_overlap(&s_base->gpu_bus_mr,
BCM2838_VC_PERI_LOW_BASE,
&s->peri_low_mr_alias, 1);
/* Extended Mass Media Controller 2 */
object_property_set_uint(OBJECT(&s->emmc2), "sd-spec-version", 3,
&error_abort);
object_property_set_uint(OBJECT(&s->emmc2), "capareg",
BCM2835_SDHC_CAPAREG, &error_abort);
object_property_set_bool(OBJECT(&s->emmc2), "pending-insert-quirk", true,
&error_abort);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->emmc2), errp)) {
return;
}
memory_region_add_subregion(&s_base->peri_mr, EMMC2_OFFSET,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->emmc2),
0));
/* According to DTS, EMMC and EMMC2 share one irq */
if (!qdev_realize(DEVICE(&s->mmc_irq_orgate), NULL, errp)) {
return;
}
mmc_irq_orgate = DEVICE(&s->mmc_irq_orgate);
sysbus_connect_irq(SYS_BUS_DEVICE(&s->emmc2), 0,
qdev_get_gpio_in(mmc_irq_orgate, 0));
sysbus_connect_irq(SYS_BUS_DEVICE(&s_base->sdhci), 0,
qdev_get_gpio_in(mmc_irq_orgate, 1));
/* Connect EMMC and EMMC2 to the interrupt controller */
qdev_connect_gpio_out(mmc_irq_orgate, 0,
qdev_get_gpio_in_named(DEVICE(&s_base->ic),
BCM2835_IC_GPU_IRQ,
INTERRUPT_ARASANSDIO));
/* Connect DMA 0-6 to the interrupt controller */
for (n = 0; n < 7; n++) {
sysbus_connect_irq(SYS_BUS_DEVICE(&s_base->dma), n,
qdev_get_gpio_in_named(DEVICE(&s_base->ic),
BCM2835_IC_GPU_IRQ,
GPU_INTERRUPT_DMA0 + n));
}
/* According to DTS, DMA 7 and 8 share one irq */
if (!qdev_realize(DEVICE(&s->dma_7_8_irq_orgate), NULL, errp)) {
return;
}
dma_7_8_irq_orgate = DEVICE(&s->dma_7_8_irq_orgate);
/* Connect DMA 7-8 to the interrupt controller */
sysbus_connect_irq(SYS_BUS_DEVICE(&s_base->dma), 7,
qdev_get_gpio_in(dma_7_8_irq_orgate, 0));
sysbus_connect_irq(SYS_BUS_DEVICE(&s_base->dma), 8,
qdev_get_gpio_in(dma_7_8_irq_orgate, 1));
qdev_connect_gpio_out(dma_7_8_irq_orgate, 0,
qdev_get_gpio_in_named(DEVICE(&s_base->ic),
BCM2835_IC_GPU_IRQ,
GPU_INTERRUPT_DMA7_8));
/* According to DTS, DMA 9 and 10 share one irq */
if (!qdev_realize(DEVICE(&s->dma_9_10_irq_orgate), NULL, errp)) {
return;
}
dma_9_10_irq_orgate = DEVICE(&s->dma_9_10_irq_orgate);
/* Connect DMA 9-10 to the interrupt controller */
sysbus_connect_irq(SYS_BUS_DEVICE(&s_base->dma), 9,
qdev_get_gpio_in(dma_9_10_irq_orgate, 0));
sysbus_connect_irq(SYS_BUS_DEVICE(&s_base->dma), 10,
qdev_get_gpio_in(dma_9_10_irq_orgate, 1));
qdev_connect_gpio_out(dma_9_10_irq_orgate, 0,
qdev_get_gpio_in_named(DEVICE(&s_base->ic),
BCM2835_IC_GPU_IRQ,
GPU_INTERRUPT_DMA9_10));
/* Connect DMA 11-14 to the interrupt controller */
for (n = 11; n < 15; n++) {
sysbus_connect_irq(SYS_BUS_DEVICE(&s_base->dma), n,
qdev_get_gpio_in_named(DEVICE(&s_base->ic),
BCM2835_IC_GPU_IRQ,
GPU_INTERRUPT_DMA11 + n
- 11));
}
/*
* Connect DMA 15 to the interrupt controller, it is physically removed
* from other DMA channels and exclusively used by the GPU
*/
sysbus_connect_irq(SYS_BUS_DEVICE(&s_base->dma), 15,
qdev_get_gpio_in_named(DEVICE(&s_base->ic),
BCM2835_IC_GPU_IRQ,
GPU_INTERRUPT_DMA15));
/* Map MPHI to BCM2838 memory map */
mphi_mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s_base->mphi), 0);
memory_region_init_alias(&s->mphi_mr_alias, OBJECT(s), "mphi", mphi_mr, 0,
BCM2838_MPHI_SIZE);
memory_region_add_subregion(&s_base->peri_mr, BCM2838_MPHI_OFFSET,
&s->mphi_mr_alias);
create_unimp(s_base, &s->clkisp, "bcm2835-clkisp", CLOCK_ISP_OFFSET,
CLOCK_ISP_SIZE);
/* GPIO */
if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio), errp)) {
return;
}
memory_region_add_subregion(
&s_base->peri_mr, GPIO_OFFSET,
sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gpio), 0));
object_property_add_alias(OBJECT(s), "sd-bus", OBJECT(&s->gpio), "sd-bus");
/* BCM2838 RPiVid ASB must be mapped to prevent kernel crash */
create_unimp(s_base, &s->asb, "bcm2838-asb", BRDG_OFFSET, 0x24);
}
static void bcm2838_peripherals_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
BCM2838PeripheralClass *bc = BCM2838_PERIPHERALS_CLASS(oc);
BCMSocPeripheralBaseClass *bc_base = BCM_SOC_PERIPHERALS_BASE_CLASS(oc);
bc->peri_low_size = 0x2000000;
bc_base->peri_size = 0x1800000;
dc->realize = bcm2838_peripherals_realize;
}
static const TypeInfo bcm2838_peripherals_type_info = {
.name = TYPE_BCM2838_PERIPHERALS,
.parent = TYPE_BCM_SOC_PERIPHERALS_BASE,
.instance_size = sizeof(BCM2838PeripheralState),
.instance_init = bcm2838_peripherals_init,
.class_size = sizeof(BCM2838PeripheralClass),
.class_init = bcm2838_peripherals_class_init,
};
static void bcm2838_peripherals_register_types(void)
{
type_register_static(&bcm2838_peripherals_type_info);
}
type_init(bcm2838_peripherals_register_types)
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