mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 05:42:58 +00:00
160 lines
3.5 KiB
C
160 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 <SA-1100.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
void serial_setbrg (void)
|
|
{
|
|
unsigned int reg = 0;
|
|
|
|
if (gd->baudrate == 1200)
|
|
reg = 191;
|
|
else if (gd->baudrate == 9600)
|
|
reg = 23;
|
|
else if (gd->baudrate == 19200)
|
|
reg = 11;
|
|
else if (gd->baudrate == 38400)
|
|
reg = 5;
|
|
else if (gd->baudrate == 57600)
|
|
reg = 3;
|
|
else if (gd->baudrate == 115200)
|
|
reg = 1;
|
|
else
|
|
hang ();
|
|
|
|
#ifdef CONFIG_SERIAL1
|
|
/* SA1110 uart function */
|
|
Ser1SDCR0 |= SDCR0_SUS;
|
|
|
|
/* Wait until port is ready ... */
|
|
while(Ser1UTSR1 & UTSR1_TBY) {}
|
|
|
|
/* init serial serial 1 */
|
|
Ser1UTCR3 = 0x00;
|
|
Ser1UTSR0 = 0xff;
|
|
Ser1UTCR0 = ( UTCR0_1StpBit | UTCR0_8BitData );
|
|
Ser1UTCR1 = 0;
|
|
Ser1UTCR2 = (u32)reg;
|
|
Ser1UTCR3 = ( UTCR3_RXE | UTCR3_TXE );
|
|
#elif defined(CONFIG_SERIAL3)
|
|
/* Wait until port is ready ... */
|
|
while (Ser3UTSR1 & UTSR1_TBY) {
|
|
}
|
|
|
|
/* init serial serial 3 */
|
|
Ser3UTCR3 = 0x00;
|
|
Ser3UTSR0 = 0xff;
|
|
Ser3UTCR0 = (UTCR0_1StpBit | UTCR0_8BitData);
|
|
Ser3UTCR1 = 0;
|
|
Ser3UTCR2 = (u32) reg;
|
|
Ser3UTCR3 = (UTCR3_RXE | UTCR3_TXE);
|
|
#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_SERIAL1
|
|
/* wait for room in the tx FIFO on SERIAL1 */
|
|
while ((Ser1UTSR0 & UTSR0_TFS) == 0);
|
|
|
|
Ser1UTDR = c;
|
|
#elif defined(CONFIG_SERIAL3)
|
|
/* wait for room in the tx FIFO on SERIAL3 */
|
|
while ((Ser3UTSR0 & UTSR0_TFS) == 0);
|
|
|
|
Ser3UTDR = c;
|
|
#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_SERIAL1
|
|
return Ser1UTSR1 & UTSR1_RNE;
|
|
#elif defined(CONFIG_SERIAL3)
|
|
return Ser3UTSR1 & UTSR1_RNE;
|
|
#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_SERIAL1
|
|
while (!(Ser1UTSR1 & UTSR1_RNE));
|
|
|
|
return (char) Ser1UTDR & 0xff;
|
|
#elif defined(CONFIG_SERIAL3)
|
|
while (!(Ser3UTSR1 & UTSR1_RNE));
|
|
|
|
return (char) Ser3UTDR & 0xff;
|
|
#endif
|
|
}
|
|
|
|
void
|
|
serial_puts (const char *s)
|
|
{
|
|
while (*s) {
|
|
serial_putc (*s++);
|
|
}
|
|
}
|