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| author | Julia Suvorova | 2018-10-30 16:23:56 +0100 |
|---|---|---|
| committer | Peter Maydell | 2018-11-02 15:03:33 +0100 |
| commit | 19790847e25c7e82bba9eb13d82894506eeabe09 (patch) | |
| tree | 9229696460baa74a6fc372babd0a9e67aa9dabcc /include/hw/char | |
| parent | hw/arm/virt: Set VIRT_COMPAT_3_0 compat (diff) | |
| download | qemu-19790847e25c7e82bba9eb13d82894506eeabe09.tar.gz qemu-19790847e25c7e82bba9eb13d82894506eeabe09.tar.xz qemu-19790847e25c7e82bba9eb13d82894506eeabe09.zip | |
hw/char: Implement nRF51 SoC UART
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>
Diffstat (limited to 'include/hw/char')
| -rw-r--r-- | include/hw/char/nrf51_uart.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/include/hw/char/nrf51_uart.h b/include/hw/char/nrf51_uart.h new file mode 100644 index 0000000000..e3ecb7c81c --- /dev/null +++ b/include/hw/char/nrf51_uart.h @@ -0,0 +1,78 @@ +/* + * 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 |