mirror of
https://github.com/ARM-software/arm-trusted-firmware.git
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ab2d31edbd
- Add instructions for contributing to ARM Trusted Firmware. - Update copyright text in all files to acknowledge contributors. Change-Id: I9311aac81b00c6c167d2f8c889aea403b84450e5
82 lines
2.7 KiB
C
82 lines
2.7 KiB
C
/*
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* Copyright (c) 2013, ARM Limited and Contributors. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* Neither the name of ARM nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <console.h>
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#include <platform.h>
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#include <pl011.h>
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/*
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* TODO: Console init functions shoule be in a console.c. This file should
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* only contain the pl011 accessors.
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*/
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void console_init(void)
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{
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unsigned int divisor;
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/* Baud Rate */
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#if defined(PL011_INTEGER) && defined(PL011_FRACTIONAL)
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mmio_write_32(PL011_BASE + UARTIBRD, PL011_INTEGER);
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mmio_write_32(PL011_BASE + UARTFBRD, PL011_FRACTIONAL);
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#else
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divisor = (PL011_CLK_IN_HZ * 4) / PL011_BAUDRATE;
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mmio_write_32(PL011_BASE + UARTIBRD, divisor >> 6);
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mmio_write_32(PL011_BASE + UARTFBRD, divisor & 0x3F);
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#endif
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mmio_write_32(PL011_BASE + UARTLCR_H, PL011_LINE_CONTROL);
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/* Clear any pending errors */
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mmio_write_32(PL011_BASE + UARTECR, 0);
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/* Enable tx, rx, and uart overall */
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mmio_write_32(PL011_BASE + UARTCR,
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PL011_UARTCR_RXE | PL011_UARTCR_TXE |
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PL011_UARTCR_UARTEN);
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}
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int console_putc(int c)
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{
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if (c == '\n') {
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console_putc('\r');
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}
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while ((mmio_read_32(PL011_BASE + UARTFR) & PL011_UARTFR_TXFE)
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== 0) ;
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mmio_write_32(PL011_BASE + UARTDR, c);
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return c;
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}
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int console_getc(void)
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{
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while ((mmio_read_32(PL011_BASE + UARTFR) & PL011_UARTFR_RXFE)
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!= 0) ;
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return mmio_read_32(PL011_BASE + UARTDR);
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}
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