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/*
* 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
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