| /* |
| * Copyright 2017 NXP |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. |
| * |
| * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * Neither the name of NXP nor the names of its contributors may be used |
| * to endorse or promote products derived from this software without specific |
| * prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <asm_macros.S> |
| |
| #define UARTBAUD 0x10 |
| #define UARTSTAT 0x14 |
| #define UARTCTRL 0x18 |
| #define UARTDATA 0x1C |
| #define UARTMATCH 0x20 |
| #define UARTMODIR 0x24 |
| #define UARTFIFO 0x28 |
| #define UARTWATER 0x2c |
| |
| #define US1_TDRE (1 << 23) |
| #define US1_RDRF (1 << 21) |
| |
| .globl console_core_init |
| .globl console_core_putc |
| .globl console_core_getc |
| .globl console_core_flush |
| |
| /* console_core_init */ |
| func console_core_init |
| mov w0, wzr |
| ret |
| endfunc console_core_init |
| |
| /* console_core_putc */ |
| func console_core_putc |
| /* Check the input parameter */ |
| cbz x1, putc_error |
| /* Insert implementation here */ |
| /* Prepare '\r' to '\n' */ |
| cmp w0, #0xA |
| b.ne 2f |
| 1: |
| /* Check if the transmit FIFO is full */ |
| ldr w2, [x1, #UARTSTAT] |
| tbz w2, #23, 1b |
| mov w2, #0xD |
| str w2, [x1, #UARTDATA] |
| 2: |
| /* Check if the transmit FIFO is full */ |
| ldr w2, [x1, #UARTSTAT] |
| tbz w2, #23, 2b |
| str w0, [x1, #UARTDATA] |
| ret |
| putc_error: |
| mov w0, #-1 |
| ret |
| endfunc console_core_putc |
| |
| /* console_core_getc */ |
| func console_core_getc |
| cbz x0, getc_error |
| /* Insert implementation here */ |
| /* Check if the receive FIFO state */ |
| ret |
| getc_error: |
| mov w0, #-1 |
| ret |
| endfunc console_core_getc |
| |
| /* console_core_flush */ |
| func console_core_flush |
| mov w0, wzr |
| ret |
| endfunc console_core_flush |