include/hw/char/stm32f2xx_usart.h

   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 "hw/hw.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 #define STM32F2XX_USART(obj) \
  58     OBJECT_CHECK(STM32F2XXUsartState, (obj), TYPE_STM32F2XX_USART)
  59
  60 typedef struct {
  61     /* <private> */
  62     SysBusDevice parent_obj;
  63
  64     /* <public> */
  65     MemoryRegion mmio;
  66
  67     uint32_t usart_sr;
  68     uint32_t usart_dr;
  69     uint32_t usart_brr;
  70     uint32_t usart_cr1;
  71     uint32_t usart_cr2;
  72     uint32_t usart_cr3;
  73     uint32_t usart_gtpr;
  74
  75     CharBackend chr;
  76     qemu_irq irq;
  77 } STM32F2XXUsartState;
  78 #endif /* HW_STM32F2XX_USART_H */