167 lines
3.5 KiB
C
167 lines
3.5 KiB
C
/*
|
|
* (C) Copyright 2002
|
|
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Marius Groeger <mgroeger@sysgo.de>
|
|
*
|
|
* (C) Copyright 2002
|
|
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
|
|
* Alex Zuepke <azu@sysgo.de>
|
|
*
|
|
* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/arch/pxa-regs.h>
|
|
|
|
void serial_setbrg (void)
|
|
{
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
unsigned int quot = 0;
|
|
|
|
if (gd->baudrate == 1200)
|
|
quot = 192;
|
|
else if (gd->baudrate == 9600)
|
|
quot = 96;
|
|
else if (gd->baudrate == 19200)
|
|
quot = 48;
|
|
else if (gd->baudrate == 38400)
|
|
quot = 24;
|
|
else if (gd->baudrate == 57600)
|
|
quot = 16;
|
|
else if (gd->baudrate == 115200)
|
|
quot = 8;
|
|
else
|
|
hang ();
|
|
|
|
#ifdef CONFIG_FFUART
|
|
|
|
CKEN |= CKEN6_FFUART;
|
|
|
|
FFIER = 0; /* Disable for now */
|
|
FFFCR = 0; /* No fifos enabled */
|
|
|
|
/* set baud rate */
|
|
FFLCR = LCR_WLS0 | LCR_WLS1 | LCR_DLAB;
|
|
FFDLL = quot & 0xff;
|
|
FFDLH = quot >> 8;
|
|
FFLCR = LCR_WLS0 | LCR_WLS1;
|
|
|
|
FFIER = IER_UUE; /* Enable FFUART */
|
|
|
|
#elif defined(CONFIG_BTUART)
|
|
CKEN |= CKEN7_BTUART;
|
|
|
|
BTIER = 0;
|
|
BTFCR = 0;
|
|
|
|
/* set baud rate */
|
|
BTLCR = LCR_DLAB;
|
|
BTDLL = quot & 0xff;
|
|
BTDLH = quot >> 8;
|
|
BTLCR = LCR_WLS0 | LCR_WLS1;
|
|
|
|
BTIER = IER_UUE; /* Enable BFUART */
|
|
|
|
#elif defined(CONFIG_STUART)
|
|
#error "Bad: not implemented yet!"
|
|
#else
|
|
#error "Bad: you didn't configured serial ..."
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* Initialise the serial port with the given baudrate. The settings
|
|
* are always 8 data bits, no parity, 1 stop bit, no start bits.
|
|
*
|
|
*/
|
|
int serial_init (void)
|
|
{
|
|
serial_setbrg ();
|
|
|
|
return (0);
|
|
}
|
|
|
|
|
|
/*
|
|
* Output a single byte to the serial port.
|
|
*/
|
|
void serial_putc (const char c)
|
|
{
|
|
#ifdef CONFIG_FFUART
|
|
/* wait for room in the tx FIFO on FFUART */
|
|
while ((FFLSR & LSR_TEMT) == 0);
|
|
|
|
FFTHR = c;
|
|
#elif defined(CONFIG_BTUART)
|
|
while ((BTLSR & LSR_TEMT ) == 0 );
|
|
BTTHR = c;
|
|
#elif defined(CONFIG_STUART)
|
|
#endif
|
|
|
|
/* If \n, also do \r */
|
|
if (c == '\n')
|
|
serial_putc ('\r');
|
|
}
|
|
|
|
/*
|
|
* Read a single byte from the serial port. Returns 1 on success, 0
|
|
* otherwise. When the function is succesfull, the character read is
|
|
* written into its argument c.
|
|
*/
|
|
int serial_tstc (void)
|
|
{
|
|
#ifdef CONFIG_FFUART
|
|
return FFLSR & LSR_DR;
|
|
#elif defined(CONFIG_BTUART)
|
|
return BTLSR & LSR_DR;
|
|
#elif defined(CONFIG_STUART)
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Read a single byte from the serial port. Returns 1 on success, 0
|
|
* otherwise. When the function is succesfull, the character read is
|
|
* written into its argument c.
|
|
*/
|
|
int serial_getc (void)
|
|
{
|
|
#ifdef CONFIG_FFUART
|
|
while (!(FFLSR & LSR_DR));
|
|
|
|
return (char) FFRBR & 0xff;
|
|
#elif defined(CONFIG_BTUART)
|
|
while (!(BTLSR & LSR_DR));
|
|
|
|
return (char) BTRBR & 0xff;
|
|
#elif defined(CONFIG_STUART)
|
|
#endif
|
|
}
|
|
|
|
void
|
|
serial_puts (const char *s)
|
|
{
|
|
while (*s) {
|
|
serial_putc (*s++);
|
|
}
|
|
}
|