| 1 | /* |
| 2 | * MAX78000 UART |
| 3 | * |
| 4 | * Copyright (c) 2025 Jackson Donaldson <jcksn@duck.com> |
| 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 7 | */ |
| 8 | |
| 9 | #ifndef HW_MAX78000_UART_H |
| 10 | #define HW_MAX78000_UART_H |
| 11 | |
| 12 | #include "hw/core/sysbus.h" |
| 13 | #include "chardev/char-fe.h" |
| 14 | #include "qemu/fifo8.h" |
| 15 | #include "qom/object.h" |
| 16 | |
| 17 | #define UART_CTRL 0x0 |
| 18 | #define UART_STATUS 0x4 |
| 19 | #define UART_INT_EN 0x8 |
| 20 | #define UART_INT_FL 0xc |
| 21 | #define UART_CLKDIV 0x10 |
| 22 | #define UART_OSR 0x14 |
| 23 | #define UART_TXPEEK 0x18 |
| 24 | #define UART_PNR 0x1c |
| 25 | #define UART_FIFO 0x20 |
| 26 | #define UART_DMA 0x30 |
| 27 | #define UART_WKEN 0x34 |
| 28 | #define UART_WKFL 0x38 |
| 29 | |
| 30 | /* CTRL */ |
| 31 | #define UART_CTF_DIS (1 << 7) |
| 32 | #define UART_FLUSH_TX (1 << 8) |
| 33 | #define UART_FLUSH_RX (1 << 9) |
| 34 | #define UART_BCLKEN (1 << 15) |
| 35 | #define UART_BCLKRDY (1 << 19) |
| 36 | |
| 37 | /* STATUS */ |
| 38 | #define UART_RX_LVL 8 |
| 39 | #define UART_TX_EM (1 << 6) |
| 40 | #define UART_RX_FULL (1 << 5) |
| 41 | #define UART_RX_EM (1 << 4) |
| 42 | |
| 43 | /* PNR (Pin Control Register) */ |
| 44 | #define UART_CTS 1 |
| 45 | #define UART_RTS (1 << 1) |
| 46 | |
| 47 | /* INT_EN / INT_FL */ |
| 48 | #define UART_RX_THD (1 << 4) |
| 49 | #define UART_TX_HE (1 << 6) |
| 50 | |
| 51 | #define UART_RXBUFLEN 0x100 |
| 52 | #define TYPE_MAX78000_UART "max78000-uart" |
| 53 | OBJECT_DECLARE_SIMPLE_TYPE(Max78000UartState, MAX78000_UART) |
| 54 | |
| 55 | struct Max78000UartState { |
| 56 | SysBusDevice parent_obj; |
| 57 | |
| 58 | MemoryRegion mmio; |
| 59 | |
| 60 | uint32_t ctrl; |
| 61 | uint32_t status; |
| 62 | uint32_t int_en; |
| 63 | uint32_t int_fl; |
| 64 | uint32_t clkdiv; |
| 65 | uint32_t osr; |
| 66 | uint32_t txpeek; |
| 67 | uint32_t pnr; |
| 68 | uint32_t fifo; |
| 69 | uint32_t dma; |
| 70 | uint32_t wken; |
| 71 | uint32_t wkfl; |
| 72 | |
| 73 | Fifo8 rx_fifo; |
| 74 | |
| 75 | CharFrontend chr; |
| 76 | qemu_irq irq; |
| 77 | }; |
| 78 | #endif /* HW_STM32F2XX_USART_H */ |