LXR qemu/include/hw/char/nrf51

   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
  24REG32(UART_STARTRX, 0x000)
  25REG32(UART_STOPRX, 0x004)
  26REG32(UART_STARTTX, 0x008)
  27REG32(UART_STOPTX, 0x00C)
  28REG32(UART_SUSPEND, 0x01C)
  29
  30REG32(UART_CTS, 0x100)
  31REG32(UART_NCTS, 0x104)
  32REG32(UART_RXDRDY, 0x108)
  33REG32(UART_TXDRDY, 0x11C)
  34REG32(UART_ERROR, 0x124)
  35REG32(UART_RXTO, 0x144)
  36
  37REG32(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)
  44REG32(UART_INTENSET, 0x304)
  45REG32(UART_INTENCLR, 0x308)
  46REG32(UART_ERRORSRC, 0x480)
  47REG32(UART_ENABLE, 0x500)
  48REG32(UART_PSELRTS, 0x508)
  49REG32(UART_PSELTXD, 0x50C)
  50REG32(UART_PSELCTS, 0x510)
  51REG32(UART_PSELRXD, 0x514)
  52REG32(UART_RXD, 0x518)
  53REG32(UART_TXD, 0x51C)
  54REG32(UART_BAUDRATE, 0x524)
  55REG32(UART_CONFIG, 0x56C)
  56
  57typedef 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
  78