Signed-off-by: Sergey Kambalin <sergey.kambalin@auriga.com>
---
hw/arm/bcm2838_peripherals.c | 27 ++++++--
hw/arm/raspi4b.c | 1 -
hw/misc/bcm2838_thermal.c | 98 ++++++++++++++++++++++++++++
hw/misc/meson.build | 3 +-
include/hw/arm/bcm2838_peripherals.h | 2 +
include/hw/misc/bcm2838_thermal.h | 24 +++++++
6 files changed, 147 insertions(+), 8 deletions(-)
create mode 100644 hw/misc/bcm2838_thermal.c
create mode 100644 include/hw/misc/bcm2838_thermal.h
diff --git a/hw/arm/bcm2838_peripherals.c b/hw/arm/bcm2838_peripherals.c
index 6b4c840c5b..48c5fd5978 100644
--- a/hw/arm/bcm2838_peripherals.c
+++ b/hw/arm/bcm2838_peripherals.c
@@ -37,6 +37,9 @@ static void bcm2838_peripherals_init(Object *obj)
/* Random Number Generator */
object_initialize_child(obj, "rng200", &s->rng200, TYPE_BCM2838_RNG200);
+ /* Thermal */
+ object_initialize_child(obj, "thermal", &s->thermal, TYPE_BCM2838_THERMAL);
+
/* PCIe Host Bridge */
object_initialize_child(obj, "pcie-host", &s->pcie_host,
TYPE_BCM2838_PCIE_HOST);
@@ -78,6 +81,9 @@ static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp)
BCMSocPeripheralBaseState *s_base = BCM_SOC_PERIPHERALS_BASE(dev);
MemoryRegion *regs_mr;
MemoryRegion *mmio_mr;
+ MemoryRegion *rng200_mr;
+ MemoryRegion *thermal_mr;
+ qemu_irq rng_200_irq;
int n;
@@ -95,12 +101,20 @@ static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp)
if (!sysbus_realize(SYS_BUS_DEVICE(&s->rng200), errp)) {
return;
}
- memory_region_add_subregion(
- &s_base->peri_mr, RNG_OFFSET,
- sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng200), 0));
- sysbus_connect_irq(SYS_BUS_DEVICE(&s->rng200), 0,
- qdev_get_gpio_in_named(DEVICE(&s_base->ic), BCM2835_IC_GPU_IRQ,
- INTERRUPT_RNG));
+ rng200_mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng200), 0);
+ memory_region_add_subregion(&s_base->peri_mr, RNG_OFFSET, rng200_mr);
+
+ rng_200_irq = qdev_get_gpio_in_named(DEVICE(&s_base->ic),
+ BCM2835_IC_GPU_IRQ, INTERRUPT_RNG);
+ sysbus_connect_irq(SYS_BUS_DEVICE(&s->rng200), 0, rng_200_irq);
+
+
+ /* THERMAL */
+ if (!sysbus_realize(SYS_BUS_DEVICE(&s->thermal), errp)) {
+ return;
+ }
+ thermal_mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->thermal), 0);
+ memory_region_add_subregion( &s->peri_low_mr, 0x15D2000, thermal_mr);
/* Extended Mass Media Controller 2 */
object_property_set_uint(OBJECT(&s->emmc2), "sd-spec-version", 3,
@@ -201,6 +215,7 @@ static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp)
BCM2838_MPHI_SIZE);
memory_region_add_subregion(&s_base->peri_mr, BCM2838_MPHI_OFFSET,
&s->mphi_mr_alias);
+
/* PCIe Root Complex */
if (!sysbus_realize(SYS_BUS_DEVICE(&s->pcie_host), errp)) {
return;
diff --git a/hw/arm/raspi4b.c b/hw/arm/raspi4b.c
index 3c71fa9a9a..175fd2c4fa 100644
--- a/hw/arm/raspi4b.c
+++ b/hw/arm/raspi4b.c
@@ -67,7 +67,6 @@ static void raspi4_modify_dtb(const struct arm_boot_info *info, void *fdt)
/* Temporarily disable following devices until they are implemented */
const char *nodes_to_remove[] = {
- "brcm,bcm2711-thermal",
"brcm,bcm2711-genet-v5",
};
diff --git a/hw/misc/bcm2838_thermal.c b/hw/misc/bcm2838_thermal.c
new file mode 100644
index 0000000000..3764d55b59
--- /dev/null
+++ b/hw/misc/bcm2838_thermal.c
@@ -0,0 +1,98 @@
+/*
+ * BCM2838 dummy thermal sensor
+ *
+ * Copyright (C) 2022 Maksim Kopusov <maksim.kopusov@auriga.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "qapi/error.h"
+#include "hw/misc/bcm2838_thermal.h"
+#include "hw/registerfields.h"
+#include "migration/vmstate.h"
+#include "qemu/error-report.h"
+
+REG32(STAT, 0x200)
+FIELD(STAT, DATA, 0, 10)
+FIELD(STAT, VALID_1, 10, 1)
+FIELD(STAT, VALID_2, 16, 1)
+
+#define BCM2838_THERMAL_SIZE 0xf00
+
+#define THERMAL_OFFSET_C 410040
+#define THERMAL_COEFF (-487.0f)
+#define MILLIDEGREE_COEFF 1000
+
+static uint16_t bcm2838_thermal_temp2adc(int temp_C)
+{
+ return (temp_C * MILLIDEGREE_COEFF - THERMAL_OFFSET_C) / THERMAL_COEFF;
+}
+
+static uint64_t bcm2838_thermal_read(void *opaque, hwaddr addr, unsigned size)
+{
+ uint32_t val = 0;
+
+ switch (addr) {
+ case A_STAT:
+ /* Temperature is always 25°C */
+ val = FIELD_DP32(val, STAT, DATA, bcm2838_thermal_temp2adc(25));
+ val = FIELD_DP32(val, STAT, VALID_1, 1);
+ val = FIELD_DP32(val, STAT, VALID_2, 1);
+
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "%s can't access addr: 0x%"HWADDR_PRIx,
+ TYPE_BCM2838_THERMAL, addr);
+ }
+ return val;
+}
+
+static void bcm2838_thermal_write(void *opaque, hwaddr addr,
+ uint64_t value, unsigned size)
+{
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: write 0x%" PRIx64
+ " to 0x%" HWADDR_PRIx "\n",
+ __func__, value, addr);
+}
+
+static const MemoryRegionOps bcm2838_thermal_ops = {
+ .read = bcm2838_thermal_read,
+ .write = bcm2838_thermal_write,
+ .impl.max_access_size = 4,
+ .valid.min_access_size = 4,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void bcm2838_thermal_realize(DeviceState *dev, Error **errp)
+{
+ Bcm2838ThermalState *s = BCM2838_THERMAL(dev);
+
+ memory_region_init_io(&s->iomem, OBJECT(s), &bcm2838_thermal_ops,
+ s, TYPE_BCM2838_THERMAL, BCM2838_THERMAL_SIZE);
+ sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
+}
+
+static void bcm2838_thermal_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->realize = bcm2838_thermal_realize;
+
+ /* This device has no state: no need for vmstate or reset */
+}
+
+static const TypeInfo bcm2838_thermal_info = {
+ .name = TYPE_BCM2838_THERMAL,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(Bcm2838ThermalState),
+ .class_init = bcm2838_thermal_class_init,
+};
+
+static void bcm2838_thermal_register_types(void)
+{
+ type_register_static(&bcm2838_thermal_info);
+}
+
+type_init(bcm2838_thermal_register_types)
diff --git a/hw/misc/meson.build b/hw/misc/meson.build
index 7c769fd2a4..8a8c5ce659 100644
--- a/hw/misc/meson.build
+++ b/hw/misc/meson.build
@@ -91,7 +91,8 @@ system_ss.add(when: 'CONFIG_RASPI', if_true: files(
'bcm2835_thermal.c',
'bcm2835_cprman.c',
'bcm2835_powermgt.c',
- 'bcm2838_rng200.c'
+ 'bcm2838_rng200.c',
+ 'bcm2838_thermal.c'
))
system_ss.add(when: 'CONFIG_SLAVIO', if_true: files('slavio_misc.c'))
system_ss.add(when: 'CONFIG_ZYNQ', if_true: files('zynq_slcr.c'))
diff --git a/include/hw/arm/bcm2838_peripherals.h b/include/hw/arm/bcm2838_peripherals.h
index 914a287af2..49bb4fab08 100644
--- a/include/hw/arm/bcm2838_peripherals.h
+++ b/include/hw/arm/bcm2838_peripherals.h
@@ -11,6 +11,7 @@
#include "hw/arm/bcm2835_peripherals.h"
#include "hw/misc/bcm2838_rng200.h"
+#include "hw/misc/bcm2838_thermal.h"
#include "hw/arm/bcm2838_pcie.h"
#include "hw/sd/sdhci.h"
#include "hw/gpio/bcm2838_gpio.h"
@@ -66,6 +67,7 @@ struct BCM2838PeripheralState {
MemoryRegion mphi_mr_alias;
BCM2838Rng200State rng200;
+ Bcm2838ThermalState thermal;
SDHCIState emmc2;
BCM2838PcieHostState pcie_host;
BCM2838GpioState gpio;
diff --git a/include/hw/misc/bcm2838_thermal.h b/include/hw/misc/bcm2838_thermal.h
new file mode 100644
index 0000000000..bb6302a037
--- /dev/null
+++ b/include/hw/misc/bcm2838_thermal.h
@@ -0,0 +1,24 @@
+/*
+ * BCM2838 dummy thermal sensor
+ *
+ * Copyright (C) 2022 Maksim Kopusov <maksim.kopusov@auriga.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef BCM2838_THERMAL_H
+#define BCM2838_THERMAL_H
+
+#include "hw/sysbus.h"
+#include "qom/object.h"
+
+#define TYPE_BCM2838_THERMAL "bcm2838-thermal"
+OBJECT_DECLARE_SIMPLE_TYPE(Bcm2838ThermalState, BCM2838_THERMAL)
+
+struct Bcm2838ThermalState {
+ SysBusDevice busdev;
+ MemoryRegion iomem;
+};
+
+#endif /* BCM2838_THERMAL_H */
--
2.34.1