M7350/bootable/bootloader/lk/platform/msm_shared/debug.c
2024-09-09 08:52:07 +00:00

97 lines
2.5 KiB
C

/*
* Copyright (c) 2009, Google Inc.
* All rights reserved.
* Copyright (c) 2009-2013, The Linux Foundation. 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 Google, Inc. 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 OWNER 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 <debug.h>
#include <printf.h>
#include <arch/arm/dcc.h>
#include <dev/fbcon.h>
#include <dev/uart.h>
#include <platform/timer.h>
static void write_dcc(char c)
{
uint32_t timeout = 10;
/* Note: Smallest sampling rate for DCC is 50us.
* This can be changed by SNOOPer.Rate on T32 window.
*/
while (timeout)
{
if (dcc_putc(c) == 0)
break;
udelay(50);
timeout--;
}
}
void _dputc(char c)
{
#if WITH_DEBUG_DCC
if (c == '\n') {
write_dcc('\r');
}
write_dcc(c) ;
#endif
#if WITH_DEBUG_UART
uart_putc(0, c);
#endif
#if WITH_DEBUG_FBCON && WITH_DEV_FBCON
fbcon_putc(c);
#endif
#if WITH_DEBUG_JTAG
jtag_dputc(c);
#endif
}
int dgetc(char *c, bool wait)
{
int n;
#if WITH_DEBUG_DCC
n = dcc_getc();
#elif WITH_DEBUG_UART
n = uart_getc(0, 0);
#else
n = -1;
#endif
if (n < 0) {
return -1;
} else {
*c = n;
return 0;
}
}
void platform_halt(void)
{
dprintf(INFO, "HALT: spinning forever...\n");
for (;;) ;
}