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hw/char: Implement nRF51 SoC UART

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Not implemented: CTS/NCTS, PSEL*.

Signed-off-by: Julia Suvorova <jusual@mail.ru>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Julia Suvorova 2018-10-30 15:23:56 +00:00 • committed by Peter Maydell
parent 7c3db4fdd2
commit 19790847e2
4 changed files with 413 additions and 0 deletions
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78
include/hw/char/nrf51_uart.h Normal file
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/*
* nRF51 SoC UART emulation
*
* Copyright (c) 2018 Julia Suvorova <jusual@mail.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 or
* (at your option) any later version.
*/
#ifndef NRF51_UART_H
#define NRF51_UART_H
#include "hw/sysbus.h"
#include "chardev/char-fe.h"
#include "hw/registerfields.h"
#define UART_FIFO_LENGTH 6
#define UART_BASE 0x40002000
#define UART_SIZE 0x1000
#define TYPE_NRF51_UART "nrf51_soc.uart"
#define NRF51_UART(obj) OBJECT_CHECK(NRF51UARTState, (obj), TYPE_NRF51_UART)
REG32(UART_STARTRX, 0x000)
REG32(UART_STOPRX, 0x004)
REG32(UART_STARTTX, 0x008)
REG32(UART_STOPTX, 0x00C)
REG32(UART_SUSPEND, 0x01C)
REG32(UART_CTS, 0x100)
REG32(UART_NCTS, 0x104)
REG32(UART_RXDRDY, 0x108)
REG32(UART_TXDRDY, 0x11C)
REG32(UART_ERROR, 0x124)
REG32(UART_RXTO, 0x144)
REG32(UART_INTEN, 0x300)
FIELD(UART_INTEN, CTS, 0, 1)
FIELD(UART_INTEN, NCTS, 1, 1)
FIELD(UART_INTEN, RXDRDY, 2, 1)
FIELD(UART_INTEN, TXDRDY, 7, 1)
FIELD(UART_INTEN, ERROR, 9, 1)
FIELD(UART_INTEN, RXTO, 17, 1)
REG32(UART_INTENSET, 0x304)
REG32(UART_INTENCLR, 0x308)
REG32(UART_ERRORSRC, 0x480)
REG32(UART_ENABLE, 0x500)
REG32(UART_PSELRTS, 0x508)
REG32(UART_PSELTXD, 0x50C)
REG32(UART_PSELCTS, 0x510)
REG32(UART_PSELRXD, 0x514)
REG32(UART_RXD, 0x518)
REG32(UART_TXD, 0x51C)
REG32(UART_BAUDRATE, 0x524)
REG32(UART_CONFIG, 0x56C)
typedef struct NRF51UARTState {
SysBusDevice parent_obj;
MemoryRegion iomem;
CharBackend chr;
qemu_irq irq;
guint watch_tag;
uint8_t rx_fifo[UART_FIFO_LENGTH];
unsigned int rx_fifo_pos;
unsigned int rx_fifo_len;
uint32_t reg[0x56C];
bool rx_started;
bool tx_started;
bool pending_tx_byte;
bool enabled;
} NRF51UARTState;
#endif