mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-25 03:18:51 +09:00
![Wolfgang Denk](/assets/img/avatar_default.png)
This commit gets rid of a huge amount of silly white-space issues. Especially, all sequences of SPACEs followed by TAB characters get removed (unless they appear in print statements). Also remove all embedded "vim:" and "vi:" statements which hide indentation problems. Signed-off-by: Wolfgang Denk <wd@denx.de>
125 lines
2.7 KiB
C
125 lines
2.7 KiB
C
/*
|
|
* U-boot - serial.c Blackfin Serial Driver
|
|
*
|
|
* Copyright (c) 2005-2008 Analog Devices Inc.
|
|
*
|
|
* Copyright (c) 2003 Bas Vermeulen <bas@buyways.nl>,
|
|
* BuyWays B.V. (www.buyways.nl)
|
|
*
|
|
* Based heavily on:
|
|
* blkfinserial.c: Serial driver for BlackFin DSP internal USRTs.
|
|
* Copyright(c) 2003 Metrowerks <mwaddel@metrowerks.com>
|
|
* Copyright(c) 2001 Tony Z. Kou <tonyko@arcturusnetworks.com>
|
|
* Copyright(c) 2001-2002 Arcturus Networks Inc. <www.arcturusnetworks.com>
|
|
*
|
|
* Based on code from 68328 version serial driver imlpementation which was:
|
|
* Copyright (C) 1995 David S. Miller <davem@caip.rutgers.edu>
|
|
* Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
|
|
* Copyright (C) 1998, 1999 D. Jeff Dionne <jeff@uclinux.org>
|
|
* Copyright (C) 1999 Vladimir Gurevich <vgurevic@cisco.com>
|
|
*
|
|
* (C) Copyright 2000-2004
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <watchdog.h>
|
|
#include <asm/blackfin.h>
|
|
#include <asm/mach-common/bits/uart.h>
|
|
|
|
#if defined(UART_LSR) && (CONFIG_UART_CONSOLE != 0)
|
|
# error CONFIG_UART_CONSOLE must be 0 on parts with only one UART
|
|
#endif
|
|
|
|
#include "serial.h"
|
|
|
|
/* Symbol for our assembly to call. */
|
|
void serial_set_baud(uint32_t baud)
|
|
{
|
|
serial_early_set_baud(baud);
|
|
}
|
|
|
|
/* Symbol for common u-boot code to call.
|
|
* Setup the baudrate (brg: baudrate generator).
|
|
*/
|
|
void serial_setbrg(void)
|
|
{
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
serial_set_baud(gd->baudrate);
|
|
}
|
|
|
|
/* Symbol for our assembly to call. */
|
|
void serial_initialize(void)
|
|
{
|
|
serial_early_init();
|
|
}
|
|
|
|
/* Symbol for common u-boot code to call. */
|
|
int serial_init(void)
|
|
{
|
|
serial_initialize();
|
|
serial_setbrg();
|
|
return 0;
|
|
}
|
|
|
|
void serial_putc(const char c)
|
|
{
|
|
/* send a \r for compatibility */
|
|
if (c == '\n')
|
|
serial_putc('\r');
|
|
|
|
WATCHDOG_RESET();
|
|
|
|
/* wait for the hardware fifo to clear up */
|
|
while (!(*pUART_LSR & THRE))
|
|
continue;
|
|
|
|
/* queue the character for transmission */
|
|
*pUART_THR = c;
|
|
SSYNC();
|
|
|
|
WATCHDOG_RESET();
|
|
|
|
/* wait for the byte to be shifted over the line */
|
|
while (!(*pUART_LSR & TEMT))
|
|
continue;
|
|
}
|
|
|
|
int serial_tstc(void)
|
|
{
|
|
WATCHDOG_RESET();
|
|
return (*pUART_LSR & DR) ? 1 : 0;
|
|
}
|
|
|
|
int serial_getc(void)
|
|
{
|
|
uint16_t uart_lsr_val, uart_rbr_val;
|
|
|
|
/* wait for data ! */
|
|
while (!serial_tstc())
|
|
continue;
|
|
|
|
/* clear the status and grab the new byte */
|
|
uart_lsr_val = *pUART_LSR;
|
|
uart_rbr_val = *pUART_RBR;
|
|
|
|
if (uart_lsr_val & (OE|PE|FE|BI)) {
|
|
/* Some parts are read-to-clear while others are
|
|
* write-to-clear. Just do the write for everyone
|
|
* since it cant hurt (other than code size).
|
|
*/
|
|
*pUART_LSR = (OE|PE|FE|BI);
|
|
return -1;
|
|
}
|
|
|
|
return uart_rbr_val & 0xFF;
|
|
}
|
|
|
|
void serial_puts(const char *s)
|
|
{
|
|
while (*s)
|
|
serial_putc(*s++);
|
|
}
|