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/*
* Nordic Semiconductor nRF51 SoC
* http://infocenter.nordicsemi.com/pdf/nRF51_RM_v3.0.1.pdf
*
* Copyright 2018 Joel Stanley <joel@jms.id.au>
*
* This code is licensed under the GPL version 2 or later. See
* the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/arm/boot.h"
#include "hw/sysbus.h"
#include "hw/misc/unimp.h"
#include "exec/address-spaces.h"
#include "qemu/log.h"
#include "cpu.h"
#include "hw/arm/nrf51.h"
#include "hw/arm/nrf51_soc.h"
/*
* The size and base is for the NRF51822 part. If other parts
* are supported in the future, add a sub-class of NRF51SoC for
* the specific variants
*/
#define NRF51822_FLASH_PAGES 256
#define NRF51822_SRAM_PAGES 16
#define NRF51822_FLASH_SIZE (NRF51822_FLASH_PAGES * NRF51_PAGE_SIZE)
#define NRF51822_SRAM_SIZE (NRF51822_SRAM_PAGES * NRF51_PAGE_SIZE)
#define BASE_TO_IRQ(base) ((base >> 12) & 0x1F)
/* HCLK (the main CPU clock) on this SoC is always 16MHz */
#define HCLK_FRQ 16000000
static uint64_t clock_read(void *opaque, hwaddr addr, unsigned int size)
{
qemu_log_mask(LOG_UNIMP, "%s: 0x%" HWADDR_PRIx " [%u]\n",
__func__, addr, size);
return 1;
}
static void clock_write(void *opaque, hwaddr addr, uint64_t data,
unsigned int size)
{
qemu_log_mask(LOG_UNIMP, "%s: 0x%" HWADDR_PRIx " <- 0x%" PRIx64 " [%u]\n",
__func__, addr, data, size);
}
static const MemoryRegionOps clock_ops = {
.read = clock_read,
.write = clock_write
};
static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
{
NRF51State *s = NRF51_SOC(dev_soc);
MemoryRegion *mr;
Error *err = NULL;
uint8_t i = 0;
hwaddr base_addr = 0;
if (!s->board_memory) {
error_setg(errp, "memory property was not set");
return;
}
system_clock_scale = NANOSECONDS_PER_SECOND / HCLK_FRQ;
object_property_set_link(OBJECT(&s->cpu), "memory", OBJECT(&s->container),
&error_abort);
if (!sysbus_realize(SYS_BUS_DEVICE(&s->cpu), errp)) {
return;
}
memory_region_add_subregion_overlap(&s->container, 0, s->board_memory, -1);
memory_region_init_ram(&s->sram, OBJECT(s), "nrf51.sram", s->sram_size,
&err);
if (err) {
error_propagate(errp, err);
return;
}
memory_region_add_subregion(&s->container, NRF51_SRAM_BASE, &s->sram);
/* UART */
if (!sysbus_realize(SYS_BUS_DEVICE(&s->uart), errp)) {
return;
}
mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->uart), 0);
memory_region_add_subregion_overlap(&s->container, NRF51_UART_BASE, mr, 0);
sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart), 0,
qdev_get_gpio_in(DEVICE(&s->cpu),
BASE_TO_IRQ(NRF51_UART_BASE)));
/* RNG */
if (!sysbus_realize(SYS_BUS_DEVICE(&s->rng), errp)) {
return;
}
mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng), 0);
memory_region_add_subregion_overlap(&s->container, NRF51_RNG_BASE, mr, 0);
sysbus_connect_irq(SYS_BUS_DEVICE(&s->rng), 0,
qdev_get_gpio_in(DEVICE(&s->cpu),
BASE_TO_IRQ(NRF51_RNG_BASE)));
/* UICR, FICR, NVMC, FLASH */
if (!object_property_set_uint(OBJECT(&s->nvm), "flash-size",
s->flash_size, errp)) {
return;
}
if (!sysbus_realize(SYS_BUS_DEVICE(&s->nvm), errp)) {
return;
}
mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->nvm), 0);
memory_region_add_subregion_overlap(&s->container, NRF51_NVMC_BASE, mr, 0);
mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->nvm), 1);
memory_region_add_subregion_overlap(&s->container, NRF51_FICR_BASE, mr, 0);
mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->nvm), 2);
memory_region_add_subregion_overlap(&s->container, NRF51_UICR_BASE, mr, 0);
mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->nvm), 3);
memory_region_add_subregion_overlap(&s->container, NRF51_FLASH_BASE, mr, 0);
/* GPIO */
if (!sysbus_realize(SYS_BUS_DEVICE(&s->gpio), errp)) {
return;
}
mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->gpio), 0);
memory_region_add_subregion_overlap(&s->container, NRF51_GPIO_BASE, mr, 0);
/* Pass all GPIOs to the SOC layer so they are available to the board */
qdev_pass_gpios(DEVICE(&s->gpio), dev_soc, NULL);
/* TIMER */
for (i = 0; i < NRF51_NUM_TIMERS; i++) {
if (!object_property_set_uint(OBJECT(&s->timer[i]), "id", i, errp)) {
return;
}
if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer[i]), errp)) {
return;
}
base_addr = NRF51_TIMER_BASE + i * NRF51_PERIPHERAL_SIZE;
sysbus_mmio_map(SYS_BUS_DEVICE(&s->timer[i]), 0, base_addr);
sysbus_connect_irq(SYS_BUS_DEVICE(&s->timer[i]), 0,
qdev_get_gpio_in(DEVICE(&s->cpu),
BASE_TO_IRQ(base_addr)));
}
/* STUB Peripherals */
memory_region_init_io(&s->clock, OBJECT(dev_soc), &clock_ops, NULL,
"nrf51_soc.clock", NRF51_PERIPHERAL_SIZE);
memory_region_add_subregion_overlap(&s->container,
NRF51_IOMEM_BASE, &s->clock, -1);
create_unimplemented_device("nrf51_soc.io", NRF51_IOMEM_BASE,
NRF51_IOMEM_SIZE);
create_unimplemented_device("nrf51_soc.private",
NRF51_PRIVATE_BASE, NRF51_PRIVATE_SIZE);
}
static void nrf51_soc_init(Object *obj)
{
uint8_t i = 0;
NRF51State *s = NRF51_SOC(obj);
memory_region_init(&s->container, obj, "nrf51-container", UINT64_MAX);
object_initialize_child(OBJECT(s), "armv6m", &s->cpu, TYPE_ARMV7M);
qdev_prop_set_string(DEVICE(&s->cpu), "cpu-type",
ARM_CPU_TYPE_NAME("cortex-m0"));
qdev_prop_set_uint32(DEVICE(&s->cpu), "num-irq", 32);
object_initialize_child(obj, "uart", &s->uart, TYPE_NRF51_UART);
object_property_add_alias(obj, "serial0", OBJECT(&s->uart), "chardev");
object_initialize_child(obj, "rng", &s->rng, TYPE_NRF51_RNG);
object_initialize_child(obj, "nvm", &s->nvm, TYPE_NRF51_NVM);
object_initialize_child(obj, "gpio", &s->gpio, TYPE_NRF51_GPIO);
for (i = 0; i < NRF51_NUM_TIMERS; i++) {
object_initialize_child(obj, "timer[*]", &s->timer[i],
TYPE_NRF51_TIMER);
}
}
static Property nrf51_soc_properties[] = {
DEFINE_PROP_LINK("memory", NRF51State, board_memory, TYPE_MEMORY_REGION,
MemoryRegion *),
DEFINE_PROP_UINT32("sram-size", NRF51State, sram_size, NRF51822_SRAM_SIZE),
DEFINE_PROP_UINT32("flash-size", NRF51State, flash_size,
NRF51822_FLASH_SIZE),
DEFINE_PROP_END_OF_LIST(),
};
static void nrf51_soc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = nrf51_soc_realize;
device_class_set_props(dc, nrf51_soc_properties);
}
static const TypeInfo nrf51_soc_info = {
.name = TYPE_NRF51_SOC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(NRF51State),
.instance_init = nrf51_soc_init,
.class_init = nrf51_soc_class_init,
};
static void nrf51_soc_types(void)
{
type_register_static(&nrf51_soc_info);
}
type_init(nrf51_soc_types)
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