97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
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/*
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* Copyright (c) 2009, Google Inc.
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* All rights reserved.
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* Copyright (c) 2009-2013, The Linux Foundation. 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
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Google, Inc. nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <debug.h>
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#include <printf.h>
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#include <arch/arm/dcc.h>
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#include <dev/fbcon.h>
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#include <dev/uart.h>
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#include <platform/timer.h>
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static void write_dcc(char c)
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{
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uint32_t timeout = 10;
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/* Note: Smallest sampling rate for DCC is 50us.
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* This can be changed by SNOOPer.Rate on T32 window.
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*/
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while (timeout)
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{
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if (dcc_putc(c) == 0)
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break;
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udelay(50);
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timeout--;
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}
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}
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void _dputc(char c)
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{
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#if WITH_DEBUG_DCC
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if (c == '\n') {
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write_dcc('\r');
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}
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write_dcc(c) ;
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#endif
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#if WITH_DEBUG_UART
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uart_putc(0, c);
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#endif
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#if WITH_DEBUG_FBCON && WITH_DEV_FBCON
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fbcon_putc(c);
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#endif
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#if WITH_DEBUG_JTAG
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jtag_dputc(c);
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#endif
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}
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int dgetc(char *c, bool wait)
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{
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int n;
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#if WITH_DEBUG_DCC
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n = dcc_getc();
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#elif WITH_DEBUG_UART
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n = uart_getc(0, 0);
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#else
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n = -1;
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#endif
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if (n < 0) {
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return -1;
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} else {
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*c = n;
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return 0;
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}
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}
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void platform_halt(void)
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{
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dprintf(INFO, "HALT: spinning forever...\n");
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for (;;) ;
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}
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