Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved. |
| 3 | * |
| 4 | * SPDX-License-Identifier: BSD-3-Clause |
| 5 | */ |
| 6 | |
Antonio Nino Diaz | 5eb8837 | 2018-11-08 10:20:19 +0000 | [diff] [blame] | 7 | #ifndef LS_16550_H |
| 8 | #define LS_16550_H |
Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 9 | |
Antonio Nino Diaz | e0f9063 | 2018-12-14 00:18:21 +0000 | [diff] [blame] | 10 | #include <drivers/console.h> |
Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 11 | |
| 12 | /* UART16550 Registers */ |
| 13 | #define UARTTX 0x0 |
| 14 | #define UARTRX 0x0 |
| 15 | #define UARTDLL 0x0 |
| 16 | #define UARTIER 0x1 |
| 17 | #define UARTDLLM 0x1 |
| 18 | #define UARTFCR 0x2 |
| 19 | #define UARTLCR 0x3 |
| 20 | #define UARTLSR 0x5 |
| 21 | #define UARTMCR 0x4 |
| 22 | |
| 23 | /* FIFO Control Register bits */ |
| 24 | #define UARTFCR_FIFOMD_16450 (0 << 6) |
| 25 | #define UARTFCR_FIFOMD_16550 (1 << 6) |
| 26 | #define UARTFCR_RXTRIG_1 (0 << 6) |
| 27 | #define UARTFCR_RXTRIG_4 (1 << 6) |
| 28 | #define UARTFCR_RXTRIG_8 (2 << 6) |
| 29 | #define UARTFCR_RXTRIG_16 (3 << 6) |
| 30 | #define UARTFCR_TXTRIG_1 (0 << 4) |
| 31 | #define UARTFCR_TXTRIG_4 (1 << 4) |
| 32 | #define UARTFCR_TXTRIG_8 (2 << 4) |
| 33 | #define UARTFCR_TXTRIG_16 (3 << 4) |
| 34 | #define UARTFCR_DMAEN (1 << 3) /* Enable DMA mode */ |
| 35 | #define UARTFCR_TXCLR (1 << 2) /* Clear contents of Tx FIFO */ |
| 36 | #define UARTFCR_RXCLR (1 << 1) /* Clear contents of Rx FIFO */ |
| 37 | #define UARTFCR_FIFOEN (1 << 0) /* Enable the Tx/Rx FIFO */ |
| 38 | #define UARTFCR_64FIFO (1 << 5) |
| 39 | |
| 40 | /* Line Control Register bits */ |
| 41 | #define UARTLCR_DLAB (1 << 7) /* Divisor Latch Access */ |
| 42 | #define UARTLCR_SETB (1 << 6) /* Set BREAK Condition */ |
| 43 | #define UARTLCR_SETP (1 << 5) /* Set Parity to LCR[4] */ |
| 44 | #define UARTLCR_EVEN (1 << 4) /* Even Parity Format */ |
| 45 | #define UARTLCR_PAR (1 << 3) /* Parity */ |
| 46 | #define UARTLCR_STOP (1 << 2) /* Stop Bit */ |
| 47 | #define UARTLCR_WORDSZ_5 0 /* Word Length of 5 */ |
| 48 | #define UARTLCR_WORDSZ_6 1 /* Word Length of 6 */ |
| 49 | #define UARTLCR_WORDSZ_7 2 /* Word Length of 7 */ |
| 50 | #define UARTLCR_WORDSZ_8 3 /* Word Length of 8 */ |
| 51 | |
| 52 | /* Line Status Register bits */ |
| 53 | #define UARTLSR_RXFIFOEMT (1 << 9) /* Rx Fifo Empty */ |
| 54 | #define UARTLSR_TXFIFOFULL (1 << 8) /* Tx Fifo Full */ |
| 55 | #define UARTLSR_RXFIFOERR (1 << 7) /* Rx Fifo Error */ |
| 56 | #define UARTLSR_TEMT (1 << 6) /* Tx Shift Register Empty */ |
| 57 | #define UARTLSR_THRE (1 << 5) /* Tx Holding Register Empty */ |
| 58 | #define UARTLSR_BRK (1 << 4) /* Break Condition Detected */ |
| 59 | #define UARTLSR_FERR (1 << 3) /* Framing Error */ |
| 60 | #define UARTLSR_PERR (1 << 3) /* Parity Error */ |
| 61 | #define UARTLSR_OVRF (1 << 2) /* Rx Overrun Error */ |
| 62 | #define UARTLSR_RDR (1 << 2) /* Rx Data Ready */ |
| 63 | |
Julius Werner | 53456fc | 2019-07-09 13:49:11 -0700 | [diff] [blame] | 64 | #ifndef __ASSEMBLER__ |
Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 65 | |
Antonio Nino Diaz | 4b32e62 | 2018-08-16 16:52:57 +0100 | [diff] [blame] | 66 | #include <stdint.h> |
Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 67 | |
Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 68 | /* |
| 69 | * Initialize a new 16550 console instance and register it with the console |
| 70 | * framework. The |console| pointer must point to storage that will be valid |
| 71 | * for the lifetime of the console, such as a global or static local variable. |
| 72 | * Its contents will be reinitialized from scratch. |
| 73 | */ |
| 74 | int console_ls_16550_register(uintptr_t baseaddr, uint32_t clock, uint32_t baud, |
Andre Przywara | 15069ea | 2020-01-25 00:58:35 +0000 | [diff] [blame^] | 75 | console_t *console); |
Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 76 | |
Julius Werner | 53456fc | 2019-07-09 13:49:11 -0700 | [diff] [blame] | 77 | #endif /*__ASSEMBLER__*/ |
Jiafei Pan | 46367ad | 2018-03-02 07:23:30 +0000 | [diff] [blame] | 78 | |
Antonio Nino Diaz | 5eb8837 | 2018-11-08 10:20:19 +0000 | [diff] [blame] | 79 | #endif /* LS_16550_H */ |