79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
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/*
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* nRF51 SoC UART emulation
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*
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* Copyright (c) 2018 Julia Suvorova <jusual@mail.ru>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 or
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* (at your option) any later version.
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*/
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#ifndef NRF51_UART_H
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#define NRF51_UART_H
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#include "hw/sysbus.h"
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#include "chardev/char-fe.h"
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#include "hw/registerfields.h"
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#define UART_FIFO_LENGTH 6
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#define UART_BASE 0x40002000
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#define UART_SIZE 0x1000
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#define TYPE_NRF51_UART "nrf51_soc.uart"
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#define NRF51_UART(obj) OBJECT_CHECK(NRF51UARTState, (obj), TYPE_NRF51_UART)
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REG32(UART_STARTRX, 0x000)
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REG32(UART_STOPRX, 0x004)
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REG32(UART_STARTTX, 0x008)
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REG32(UART_STOPTX, 0x00C)
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REG32(UART_SUSPEND, 0x01C)
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REG32(UART_CTS, 0x100)
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REG32(UART_NCTS, 0x104)
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REG32(UART_RXDRDY, 0x108)
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REG32(UART_TXDRDY, 0x11C)
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REG32(UART_ERROR, 0x124)
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REG32(UART_RXTO, 0x144)
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REG32(UART_INTEN, 0x300)
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FIELD(UART_INTEN, CTS, 0, 1)
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FIELD(UART_INTEN, NCTS, 1, 1)
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FIELD(UART_INTEN, RXDRDY, 2, 1)
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FIELD(UART_INTEN, TXDRDY, 7, 1)
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FIELD(UART_INTEN, ERROR, 9, 1)
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FIELD(UART_INTEN, RXTO, 17, 1)
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REG32(UART_INTENSET, 0x304)
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REG32(UART_INTENCLR, 0x308)
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REG32(UART_ERRORSRC, 0x480)
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REG32(UART_ENABLE, 0x500)
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REG32(UART_PSELRTS, 0x508)
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REG32(UART_PSELTXD, 0x50C)
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REG32(UART_PSELCTS, 0x510)
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REG32(UART_PSELRXD, 0x514)
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REG32(UART_RXD, 0x518)
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REG32(UART_TXD, 0x51C)
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REG32(UART_BAUDRATE, 0x524)
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REG32(UART_CONFIG, 0x56C)
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typedef struct NRF51UARTState {
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SysBusDevice parent_obj;
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MemoryRegion iomem;
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CharBackend chr;
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qemu_irq irq;
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guint watch_tag;
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uint8_t rx_fifo[UART_FIFO_LENGTH];
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unsigned int rx_fifo_pos;
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unsigned int rx_fifo_len;
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uint32_t reg[0x56C];
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bool rx_started;
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bool tx_started;
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bool pending_tx_byte;
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bool enabled;
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} NRF51UARTState;
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#endif
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