blob: cb4514f3f4816dddc3d6c5f616613a22eadae645 [file] [log] [blame]
/*
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef LS_16550_H
#define LS_16550_H
#include <drivers/console.h>
/* UART16550 Registers */
#define UARTTX 0x0
#define UARTRX 0x0
#define UARTDLL 0x0
#define UARTIER 0x1
#define UARTDLLM 0x1
#define UARTFCR 0x2
#define UARTLCR 0x3
#define UARTLSR 0x5
#define UARTMCR 0x4
/* 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 */
#define UARTFCR_64FIFO (1 << 5)
/* 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 (1 << 2) /* Rx Data Ready */
#define CONSOLE_T_16550_BASE CONSOLE_T_DRVDATA
#ifndef __ASSEMBLER__
#include <stdint.h>
typedef struct {
console_t console;
uintptr_t base;
} console_ls_16550_t;
/*
* 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.
*/
int console_ls_16550_register(uintptr_t baseaddr, uint32_t clock, uint32_t baud,
console_ls_16550_t *console);
#endif /*__ASSEMBLER__*/
#endif /* LS_16550_H */