diff options
Diffstat (limited to 'include/drivers/ti/uart')
| -rw-r--r-- | include/drivers/ti/uart/uart_16550.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/include/drivers/ti/uart/uart_16550.h b/include/drivers/ti/uart/uart_16550.h new file mode 100644 index 0000000..bddd997 --- /dev/null +++ b/include/drivers/ti/uart/uart_16550.h @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#ifndef UART_16550_H +#define UART_16550_H + +#include <drivers/console.h> + +/* UART16550 Registers */ +#define UARTTX 0x0 +#define UARTRX 0x0 +#define UARTDLL 0x0 +#define UARTIER 0x4 +#define UARTDLLM 0x4 +#define UARTIIR 0x8 +#define UARTFCR 0x8 +#define UARTLCR 0xc +#define UARTMCR 0x10 +#define UARTLSR 0x14 +#define UARTMSR 0x18 +#define UARTSPR 0x1c +#define UARTCSR 0x20 +/* Some instances have MDR1 defined as well */ +#define UARTMDR1 0x20 +#define UARTRXFIFOCFG 0x24 +#define UARTMIE 0x28 +#define UARTVNDR 0x2c +#define UARTASR 0x3c + +/* FIFO Control Register bits */ +#define UARTFCR_FIFOMD_16450 (0 << 6) +#define UARTFCR_FIFOMD_16550 (1 << 6) +#define UARTFCR_RXTRIG_1 (0 << 6) +#define UARTFCR_RXTRIG_4 (1 << 6) +#define UARTFCR_RXTRIG_8 (2 << 6) +#define UARTFCR_RXTRIG_16 (3 << 6) +#define UARTFCR_TXTRIG_1 (0 << 4) +#define UARTFCR_TXTRIG_4 (1 << 4) +#define UARTFCR_TXTRIG_8 (2 << 4) +#define UARTFCR_TXTRIG_16 (3 << 4) +#define UARTFCR_DMAEN (1 << 3) /* Enable DMA mode */ +#define UARTFCR_TXCLR (1 << 2) /* Clear contents of Tx FIFO */ +#define UARTFCR_RXCLR (1 << 1) /* Clear contents of Rx FIFO */ +#define UARTFCR_FIFOEN (1 << 0) /* Enable the Tx/Rx FIFO */ + +/* Line Control Register bits */ +#define UARTLCR_DLAB (1 << 7) /* Divisor Latch Access */ +#define UARTLCR_SETB (1 << 6) /* Set BREAK Condition */ +#define UARTLCR_SETP (1 << 5) /* Set Parity to LCR[4] */ +#define UARTLCR_EVEN (1 << 4) /* Even Parity Format */ +#define UARTLCR_PAR (1 << 3) /* Parity */ +#define UARTLCR_STOP (1 << 2) /* Stop Bit */ +#define UARTLCR_WORDSZ_5 0 /* Word Length of 5 */ +#define UARTLCR_WORDSZ_6 1 /* Word Length of 6 */ +#define UARTLCR_WORDSZ_7 2 /* Word Length of 7 */ +#define UARTLCR_WORDSZ_8 3 /* Word Length of 8 */ + +/* Line Status Register bits */ +#define UARTLSR_RXFIFOEMT (1 << 9) /* Rx Fifo Empty */ +#define UARTLSR_TXFIFOFULL (1 << 8) /* Tx Fifo Full */ +#define UARTLSR_RXFIFOERR (1 << 7) /* Rx Fifo Error */ +#define UARTLSR_TEMT (1 << 6) /* Tx Shift Register Empty */ +#define UARTLSR_THRE (1 << 5) /* Tx Holding Register Empty */ +#define UARTLSR_BRK (1 << 4) /* Break Condition Detected */ +#define UARTLSR_FERR (1 << 3) /* Framing Error */ +#define UARTLSR_PERR (1 << 3) /* Parity Error */ +#define UARTLSR_OVRF (1 << 2) /* Rx Overrun Error */ +#define UARTLSR_RDR_BIT (0) /* Rx Data Ready Bit */ +#define UARTLSR_RDR (1 << UARTLSR_RDR_BIT) /* Rx Data Ready */ + +#ifndef __ASSEMBLER__ + +#include <stdint.h> + +/* + * Initialize a new 16550 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. + * When |clock| has a value of 0, the UART will *not* be initialised. This + * means the UART should already be enabled and the baudrate and clock setup + * should have been done already, either by platform specific code or by + * previous firmware stages. The |baud| parameter will be ignored in this + * case as well. + */ +int console_16550_register(uintptr_t baseaddr, uint32_t clock, uint32_t baud, + console_t *console); + +#endif /*__ASSEMBLER__*/ + +#endif /* UART_16550_H */ |