/* * B-L475E-IOT01A Discovery Kit machine * (B-L475E-IOT01A IoT Node) * * Copyright (c) 2023-2024 Arnaud Minier * Copyright (c) 2023-2024 Inès Varhol * * SPDX-License-Identifier: GPL-2.0-or-later * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. * * This work is heavily inspired by the netduinoplus2 by Alistair Francis. * Original code is licensed under the MIT License: * * Copyright (c) 2014 Alistair Francis */ /* * The reference used is the STMicroElectronics UM2153 User manual * Discovery kit for IoT node, multi-channel communication with STM32L4. * https://www.st.com/en/evaluation-tools/b-l475e-iot01a.html#documentation */ #include "qemu/osdep.h" #include "qapi/error.h" #include "hw/boards.h" #include "hw/qdev-properties.h" #include "qemu/error-report.h" #include "hw/arm/boot.h" #include "hw/core/split-irq.h" #include "hw/arm/stm32l4x5_soc.h" #include "hw/gpio/stm32l4x5_gpio.h" #include "hw/display/dm163.h" /* B-L475E-IOT01A implementation is inspired from netduinoplus2 and arduino */ /* * There are actually 14 input pins in the DM163 device. * Here the DM163 input pin EN isn't connected to the STM32L4x5 * GPIOs as the IM120417002 colors shield doesn't actually use * this pin to drive the RGB matrix. */ #define NUM_DM163_INPUTS 13 static const unsigned dm163_input[NUM_DM163_INPUTS] = { 1 * GPIO_NUM_PINS + 2, /* ROW0 PB2 */ 0 * GPIO_NUM_PINS + 15, /* ROW1 PA15 */ 0 * GPIO_NUM_PINS + 2, /* ROW2 PA2 */ 0 * GPIO_NUM_PINS + 7, /* ROW3 PA7 */ 0 * GPIO_NUM_PINS + 6, /* ROW4 PA6 */ 0 * GPIO_NUM_PINS + 5, /* ROW5 PA5 */ 1 * GPIO_NUM_PINS + 0, /* ROW6 PB0 */ 0 * GPIO_NUM_PINS + 3, /* ROW7 PA3 */ 0 * GPIO_NUM_PINS + 4, /* SIN (SDA) PA4 */ 1 * GPIO_NUM_PINS + 1, /* DCK (SCK) PB1 */ 2 * GPIO_NUM_PINS + 3, /* RST_B (RST) PC3 */ 2 * GPIO_NUM_PINS + 4, /* LAT_B (LAT) PC4 */ 2 * GPIO_NUM_PINS + 5, /* SELBK (SB) PC5 */ }; #define TYPE_B_L475E_IOT01A MACHINE_TYPE_NAME("b-l475e-iot01a") OBJECT_DECLARE_SIMPLE_TYPE(Bl475eMachineState, B_L475E_IOT01A) typedef struct Bl475eMachineState { MachineState parent_obj; Stm32l4x5SocState soc; SplitIRQ gpio_splitters[NUM_DM163_INPUTS]; DM163State dm163; } Bl475eMachineState; static void bl475e_init(MachineState *machine) { Bl475eMachineState *s = B_L475E_IOT01A(machine); const Stm32l4x5SocClass *sc; DeviceState *dev, *gpio_out_splitter; unsigned gpio, pin; object_initialize_child(OBJECT(machine), "soc", &s->soc, TYPE_STM32L4X5XG_SOC); sysbus_realize(SYS_BUS_DEVICE(&s->soc), &error_fatal); sc = STM32L4X5_SOC_GET_CLASS(&s->soc); armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename, 0, sc->flash_size); if (object_class_by_name(TYPE_DM163)) { object_initialize_child(OBJECT(machine), "dm163", &s->dm163, TYPE_DM163); dev = DEVICE(&s->dm163); qdev_realize(dev, NULL, &error_abort); for (unsigned i = 0; i < NUM_DM163_INPUTS; i++) { object_initialize_child(OBJECT(machine), "gpio-out-splitters[*]", &s->gpio_splitters[i], TYPE_SPLIT_IRQ); gpio_out_splitter = DEVICE(&s->gpio_splitters[i]); qdev_prop_set_uint32(gpio_out_splitter, "num-lines", 2); qdev_realize(gpio_out_splitter, NULL, &error_fatal); qdev_connect_gpio_out(gpio_out_splitter, 0, qdev_get_gpio_in(DEVICE(&s->soc), dm163_input[i])); qdev_connect_gpio_out(gpio_out_splitter, 1, qdev_get_gpio_in(dev, i)); gpio = dm163_input[i] / GPIO_NUM_PINS; pin = dm163_input[i] % GPIO_NUM_PINS; qdev_connect_gpio_out(DEVICE(&s->soc.gpio[gpio]), pin, qdev_get_gpio_in(DEVICE(gpio_out_splitter), 0)); } } } static void bl475e_machine_init(ObjectClass *oc, void *data) { MachineClass *mc = MACHINE_CLASS(oc); static const char *machine_valid_cpu_types[] = { ARM_CPU_TYPE_NAME("cortex-m4"), NULL }; mc->desc = "B-L475E-IOT01A Discovery Kit (Cortex-M4)"; mc->init = bl475e_init; mc->valid_cpu_types = machine_valid_cpu_types; /* SRAM pre-allocated as part of the SoC instantiation */ mc->default_ram_size = 0; } static const TypeInfo bl475e_machine_type[] = { { .name = TYPE_B_L475E_IOT01A, .parent = TYPE_MACHINE, .instance_size = sizeof(Bl475eMachineState), .class_init = bl475e_machine_init, } }; DEFINE_TYPES(bl475e_machine_type)