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Sun, 25 Feb 2024 16:03:22 -0800 (PST) From: Sergey Kambalin X-Google-Original-From: Sergey Kambalin To: qemu-arm@nongnu.org Cc: qemu-devel@nongnu.org, Sergey Kambalin , Peter Maydell Subject: [PATCH v6 17/41] Implement BCM2838 thermal sensor Date: Sun, 25 Feb 2024 18:02:35 -0600 Message-Id: <20240226000259.2752893-18-sergey.kambalin@auriga.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240226000259.2752893-1-sergey.kambalin@auriga.com> References: <20240226000259.2752893-1-sergey.kambalin@auriga.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::112b; envelope-from=serg.oker@gmail.com; helo=mail-yw1-x112b.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Signed-off-by: Sergey Kambalin Reviewed-by: Peter Maydell --- hw/arm/bcm2838_peripherals.c | 11 ++++ hw/arm/raspi4b.c | 1 - hw/misc/bcm2838_thermal.c | 98 ++++++++++++++++++++++++++++ hw/misc/meson.build | 1 + include/hw/arm/bcm2838_peripherals.h | 2 + include/hw/misc/bcm2838_thermal.h | 24 +++++++ 6 files changed, 136 insertions(+), 1 deletion(-) 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 4a9cbe6cf6..6badda3045 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); @@ -80,6 +83,7 @@ static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp) MemoryRegion *mmio_mr; MemoryRegion *rng200_mr; qemu_irq rng_200_irq; + MemoryRegion *thermal_mr; int n; @@ -105,6 +109,13 @@ static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp) 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, &error_abort); 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 + * + * 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 a3bee4375d..764e27ef67 100644 --- a/hw/misc/meson.build +++ b/hw/misc/meson.build @@ -93,6 +93,7 @@ system_ss.add(when: 'CONFIG_RASPI', if_true: files( 'bcm2835_cprman.c', 'bcm2835_powermgt.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 + * + * 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 */