83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/*
|
|
* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
|
|
*
|
|
* 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 ARM 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 <console.h>
|
|
#include <platform.h>
|
|
#include <pl011.h>
|
|
|
|
/*
|
|
* TODO: Console init functions shoule be in a console.c. This file should
|
|
* only contain the pl011 accessors.
|
|
*/
|
|
void console_init(void)
|
|
{
|
|
unsigned int divisor;
|
|
|
|
/* Baud Rate */
|
|
|
|
#if defined(PL011_INTEGER) && defined(PL011_FRACTIONAL)
|
|
mmio_write_32(PL011_BASE + UARTIBRD, PL011_INTEGER);
|
|
mmio_write_32(PL011_BASE + UARTFBRD, PL011_FRACTIONAL);
|
|
#else
|
|
divisor = (PL011_CLK_IN_HZ * 4) / PL011_BAUDRATE;
|
|
mmio_write_32(PL011_BASE + UARTIBRD, divisor >> 6);
|
|
mmio_write_32(PL011_BASE + UARTFBRD, divisor & 0x3F);
|
|
#endif
|
|
|
|
|
|
mmio_write_32(PL011_BASE + UARTLCR_H, PL011_LINE_CONTROL);
|
|
|
|
/* Clear any pending errors */
|
|
mmio_write_32(PL011_BASE + UARTECR, 0);
|
|
|
|
/* Enable tx, rx, and uart overall */
|
|
mmio_write_32(PL011_BASE + UARTCR,
|
|
PL011_UARTCR_RXE | PL011_UARTCR_TXE |
|
|
PL011_UARTCR_UARTEN);
|
|
}
|
|
|
|
int console_putc(int c)
|
|
{
|
|
if (c == '\n') {
|
|
console_putc('\r');
|
|
}
|
|
while ((mmio_read_32(PL011_BASE + UARTFR) & PL011_UARTFR_TXFE)
|
|
== 0) ;
|
|
mmio_write_32(PL011_BASE + UARTDR, c);
|
|
return c;
|
|
}
|
|
|
|
int console_getc(void)
|
|
{
|
|
while ((mmio_read_32(PL011_BASE + UARTFR) & PL011_UARTFR_RXFE)
|
|
!= 0) ;
|
|
return mmio_read_32(PL011_BASE + UARTDR);
|
|
}
|