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Diffstat (limited to '')
| -rw-r--r-- | include/drivers/cadence/cdns_uart.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/include/drivers/cadence/cdns_uart.h b/include/drivers/cadence/cdns_uart.h new file mode 100644 index 0000000..30ca910 --- /dev/null +++ b/include/drivers/cadence/cdns_uart.h @@ -0,0 +1,44 @@ +/* + * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef CDNS_UART_H +#define CDNS_UART_H + +#include <drivers/console.h> + +/* This is very minimalistic and will only work in QEMU. */ + +/* CADENCE Registers */ +#define R_UART_CR 0 +#define R_UART_CR_RXRST (1 << 0) /* RX logic reset */ +#define R_UART_CR_TXRST (1 << 1) /* TX logic reset */ +#define R_UART_CR_RX_EN (1 << 2) /* RX enabled */ +#define R_UART_CR_TX_EN (1 << 4) /* TX enabled */ + +#define R_UART_SR 0x2C +#define UART_SR_INTR_REMPTY_BIT 1 +#define UART_SR_INTR_TFUL_BIT 4 +#define UART_SR_INTR_TEMPTY_BIT 3 + +#define R_UART_TX 0x30 +#define R_UART_RX 0x30 + +#ifndef __ASSEMBLER__ + +#include <stdint.h> + +/* + * Initialize a new Cadence console instance and register it with the console + * framework. The |console| pointer must point to storage that will be valid + * for the lifetime of the console, such as a global or static local variable. + * Its contents will be reinitialized from scratch. + */ +int console_cdns_register(uintptr_t baseaddr, uint32_t clock, uint32_t baud, + console_t *console); + +#endif /*__ASSEMBLER__*/ + +#endif /* CDNS_UART_H */ |