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Diffstat (limited to 'include/hw/char/shakti_uart.h')
| -rw-r--r-- | include/hw/char/shakti_uart.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/include/hw/char/shakti_uart.h b/include/hw/char/shakti_uart.h new file mode 100644 index 000000000..526c40823 --- /dev/null +++ b/include/hw/char/shakti_uart.h @@ -0,0 +1,74 @@ +/* + * SHAKTI UART + * + * Copyright (c) 2021 Vijai Kumar K <vijai@behindbytes.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#ifndef HW_SHAKTI_UART_H +#define HW_SHAKTI_UART_H + +#include "hw/sysbus.h" +#include "chardev/char-fe.h" + +#define SHAKTI_UART_BAUD 0x00 +#define SHAKTI_UART_TX 0x04 +#define SHAKTI_UART_RX 0x08 +#define SHAKTI_UART_STATUS 0x0C +#define SHAKTI_UART_DELAY 0x10 +#define SHAKTI_UART_CONTROL 0x14 +#define SHAKTI_UART_INT_EN 0x18 +#define SHAKTI_UART_IQ_CYCLES 0x1C +#define SHAKTI_UART_RX_THRES 0x20 + +#define SHAKTI_UART_STATUS_TX_EMPTY (1 << 0) +#define SHAKTI_UART_STATUS_TX_FULL (1 << 1) +#define SHAKTI_UART_STATUS_RX_NOT_EMPTY (1 << 2) +#define SHAKTI_UART_STATUS_RX_FULL (1 << 3) +/* 9600 8N1 is the default setting */ +/* Reg value = (50000000 Hz)/(16 * 9600)*/ +#define SHAKTI_UART_BAUD_DEFAULT 0x0145 +#define SHAKTI_UART_CONTROL_DEFAULT 0x0100 + +#define TYPE_SHAKTI_UART "shakti-uart" +#define SHAKTI_UART(obj) \ + OBJECT_CHECK(ShaktiUartState, (obj), TYPE_SHAKTI_UART) + +typedef struct { + /* <private> */ + SysBusDevice parent_obj; + + /* <public> */ + MemoryRegion mmio; + + uint32_t uart_baud; + uint32_t uart_tx; + uint32_t uart_rx; + uint32_t uart_status; + uint32_t uart_delay; + uint32_t uart_control; + uint32_t uart_interrupt; + uint32_t uart_iq_cycles; + uint32_t uart_rx_threshold; + + CharBackend chr; +} ShaktiUartState; + +#endif /* HW_SHAKTI_UART_H */ |