include/hw/char/nrf51_uart.h

   1 /*
   2  * nRF51 SoC UART emulation
   3  *
   4  * Copyright (c) 2018 Julia Suvorova <jusual@mail.ru>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 or
   8  * (at your option) any later version.
   9  */
  10
  11 #ifndef NRF51_UART_H
  12 #define NRF51_UART_H
  13
  14 #include "hw/sysbus.h"
  15 #include "chardev/char-fe.h"
  16 #include "hw/registerfields.h"
  17
  18 #define UART_FIFO_LENGTH 6
  19 #define UART_SIZE 0x1000
  20
  21 #define TYPE_NRF51_UART "nrf51_soc.uart"
  22 #define NRF51_UART(obj) OBJECT_CHECK(NRF51UARTState, (obj), TYPE_NRF51_UART)
  23
  24 REG32(UART_STARTRX, 0x000)
  25 REG32(UART_STOPRX, 0x004)
  26 REG32(UART_STARTTX, 0x008)
  27 REG32(UART_STOPTX, 0x00C)
  28 REG32(UART_SUSPEND, 0x01C)
  29
  30 REG32(UART_CTS, 0x100)
  31 REG32(UART_NCTS, 0x104)
  32 REG32(UART_RXDRDY, 0x108)
  33 REG32(UART_TXDRDY, 0x11C)
  34 REG32(UART_ERROR, 0x124)
  35 REG32(UART_RXTO, 0x144)
  36
  37 REG32(UART_INTEN, 0x300)
  38     FIELD(UART_INTEN, CTS, 0, 1)
  39     FIELD(UART_INTEN, NCTS, 1, 1)
  40     FIELD(UART_INTEN, RXDRDY, 2, 1)
  41     FIELD(UART_INTEN, TXDRDY, 7, 1)
  42     FIELD(UART_INTEN, ERROR, 9, 1)
  43     FIELD(UART_INTEN, RXTO, 17, 1)
  44 REG32(UART_INTENSET, 0x304)
  45 REG32(UART_INTENCLR, 0x308)
  46 REG32(UART_ERRORSRC, 0x480)
  47 REG32(UART_ENABLE, 0x500)
  48 REG32(UART_PSELRTS, 0x508)
  49 REG32(UART_PSELTXD, 0x50C)
  50 REG32(UART_PSELCTS, 0x510)
  51 REG32(UART_PSELRXD, 0x514)
  52 REG32(UART_RXD, 0x518)
  53 REG32(UART_TXD, 0x51C)
  54 REG32(UART_BAUDRATE, 0x524)
  55 REG32(UART_CONFIG, 0x56C)
  56
  57 typedef struct NRF51UARTState {
  58     SysBusDevice parent_obj;
  59
  60     MemoryRegion iomem;
  61     CharBackend chr;
  62     qemu_irq irq;
  63     guint watch_tag;
  64
  65     uint8_t rx_fifo[UART_FIFO_LENGTH];
  66     unsigned int rx_fifo_pos;
  67     unsigned int rx_fifo_len;
  68
  69     uint32_t reg[0x56C];
  70
  71     bool rx_started;
  72     bool tx_started;
  73     bool pending_tx_byte;
  74     bool enabled;
  75 } NRF51UARTState;
  76
  77 #endif