| 1 | /* |
| 2 | * STM32L4X5 USART (Universal Synchronous Asynchronous Receiver Transmitter) |
| 3 | * |
| 4 | * Copyright (c) 2023 Arnaud Minier <arnaud.minier@telecom-paris.fr> |
| 5 | * Copyright (c) 2023 Inès Varhol <ines.varhol@telecom-paris.fr> |
| 6 | * |
| 7 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 10 | * See the COPYING file in the top-level directory. |
| 11 | * |
| 12 | * The STM32L4X5 USART is heavily inspired by the stm32f2xx_usart |
| 13 | * by Alistair Francis. |
| 14 | * The reference used is the STMicroElectronics RM0351 Reference manual |
| 15 | * for STM32L4x5 and STM32L4x6 advanced Arm ® -based 32-bit MCUs. |
| 16 | */ |
| 17 | |
| 18 | #ifndef HW_STM32L4X5_USART_H |
| 19 | #define HW_STM32L4X5_USART_H |
| 20 | |
| 21 | #include "hw/core/sysbus.h" |
| 22 | #include "chardev/char-fe.h" |
| 23 | #include "qom/object.h" |
| 24 | |
| 25 | #define TYPE_STM32L4X5_USART_BASE "stm32l4x5-usart-base" |
| 26 | #define TYPE_STM32L4X5_USART "stm32l4x5-usart" |
| 27 | #define TYPE_STM32L4X5_UART "stm32l4x5-uart" |
| 28 | #define TYPE_STM32L4X5_LPUART "stm32l4x5-lpuart" |
| 29 | OBJECT_DECLARE_TYPE(Stm32l4x5UsartBaseState, Stm32l4x5UsartBaseClass, |
| 30 | STM32L4X5_USART_BASE) |
| 31 | |
| 32 | typedef enum { |
| 33 | STM32L4x5_USART, |
| 34 | STM32L4x5_UART, |
| 35 | STM32L4x5_LPUART, |
| 36 | } Stm32l4x5UsartType; |
| 37 | |
| 38 | struct Stm32l4x5UsartBaseState { |
| 39 | SysBusDevice parent_obj; |
| 40 | |
| 41 | MemoryRegion mmio; |
| 42 | |
| 43 | uint32_t cr1; |
| 44 | uint32_t cr2; |
| 45 | uint32_t cr3; |
| 46 | uint32_t brr; |
| 47 | uint32_t gtpr; |
| 48 | uint32_t rtor; |
| 49 | /* rqr is write-only */ |
| 50 | uint32_t isr; |
| 51 | /* icr is a clear register */ |
| 52 | uint32_t rdr; |
| 53 | uint32_t tdr; |
| 54 | |
| 55 | Clock *clk; |
| 56 | CharFrontend chr; |
| 57 | qemu_irq irq; |
| 58 | guint watch_tag; |
| 59 | }; |
| 60 | |
| 61 | struct Stm32l4x5UsartBaseClass { |
| 62 | SysBusDeviceClass parent_class; |
| 63 | |
| 64 | Stm32l4x5UsartType type; |
| 65 | }; |
| 66 | |
| 67 | #endif /* HW_STM32L4X5_USART_H */ |