1 /* 2 * STM32F2XX USART 3 * 4 * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me> 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 #ifndef HW_STM32F2XX_USART_H 26 #define HW_STM32F2XX_USART_H 27 28 #include "hw/sysbus.h" 29 #include "chardev/char-fe.h" 30 #include "qom/object.h" 31 32 #define USART_SR 0x00 33 #define USART_DR 0x04 34 #define USART_BRR 0x08 35 #define USART_CR1 0x0C 36 #define USART_CR2 0x10 37 #define USART_CR3 0x14 38 #define USART_GTPR 0x18 39 40 /* 41 * NB: The reset value mentioned in "24.6.1 Status register" seems bogus. 42 * Looking at "Table 98 USART register map and reset values", it seems it 43 * should be 0xc0, and that's how real hardware behaves. 44 */ 45 #define USART_SR_RESET (USART_SR_TXE | USART_SR_TC) 46 47 #define USART_SR_TXE (1 << 7) 48 #define USART_SR_TC (1 << 6) 49 #define USART_SR_RXNE (1 << 5) 50 51 #define USART_CR1_UE (1 << 13) 52 #define USART_CR1_RXNEIE (1 << 5) 53 #define USART_CR1_TE (1 << 3) 54 #define USART_CR1_RE (1 << 2) 55 56 #define TYPE_STM32F2XX_USART "stm32f2xx-usart" 57 OBJECT_DECLARE_SIMPLE_TYPE(STM32F2XXUsartState, STM32F2XX_USART) 58 59 struct STM32F2XXUsartState { 60 /* <private> */ 61 SysBusDevice parent_obj; 62 63 /* <public> */ 64 MemoryRegion mmio; 65 66 uint32_t usart_sr; 67 uint32_t usart_dr; 68 uint32_t usart_brr; 69 uint32_t usart_cr1; 70 uint32_t usart_cr2; 71 uint32_t usart_cr3; 72 uint32_t usart_gtpr; 73 74 CharBackend chr; 75 qemu_irq irq; 76 }; 77 #endif /* HW_STM32F2XX_USART_H */ 78