mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-21 01:18:52 +09:00
203 lines
4.1 KiB
C
203 lines
4.1 KiB
C
/*
|
|
* (C) Copyright 2002-2004
|
|
* 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>
|
|
|
|
#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
|
|
|
|
#include <clps7111.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
void serial_setbrg (void)
|
|
{
|
|
unsigned int reg = 0;
|
|
|
|
switch (gd->baudrate) {
|
|
case 1200: reg = 191; break;
|
|
case 9600: reg = 23; break;
|
|
case 19200: reg = 11; break;
|
|
case 38400: reg = 5; break;
|
|
case 57600: reg = 3; break;
|
|
case 115200: reg = 1; break;
|
|
default: hang (); break;
|
|
}
|
|
|
|
/* init serial serial 1,2 */
|
|
IO_SYSCON1 = SYSCON1_UART1EN;
|
|
IO_SYSCON2 = SYSCON2_UART2EN;
|
|
|
|
reg |= UBRLCR_WRDLEN8;
|
|
|
|
IO_UBRLCR1 = reg;
|
|
IO_UBRLCR2 = reg;
|
|
}
|
|
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
int tmo;
|
|
|
|
/* If \n, also do \r */
|
|
if (c == '\n')
|
|
serial_putc ('\r');
|
|
|
|
tmo = get_timer (0) + 1 * CFG_HZ;
|
|
while (IO_SYSFLG1 & SYSFLG1_UTXFF)
|
|
if (get_timer (0) > tmo)
|
|
break;
|
|
|
|
IO_UARTDR1 = c;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
return !(IO_SYSFLG1 & SYSFLG1_URXFE);
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
while (IO_SYSFLG1 & SYSFLG1_URXFE);
|
|
|
|
return IO_UARTDR1 & 0xff;
|
|
}
|
|
|
|
void
|
|
serial_puts (const char *s)
|
|
{
|
|
while (*s) {
|
|
serial_putc (*s++);
|
|
}
|
|
}
|
|
|
|
#elif defined(CONFIG_LPC2292)
|
|
|
|
#include <asm/arch/hardware.h>
|
|
|
|
void serial_setbrg (void)
|
|
{
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
unsigned short divisor = 0;
|
|
|
|
switch (gd->baudrate) {
|
|
case 1200: divisor = 3072; break;
|
|
case 9600: divisor = 384; break;
|
|
case 19200: divisor = 192; break;
|
|
case 38400: divisor = 96; break;
|
|
case 57600: divisor = 64; break;
|
|
case 115200: divisor = 32; break;
|
|
default: hang (); break;
|
|
}
|
|
|
|
/* init serial UART0 */
|
|
PUT8(U0LCR, 0);
|
|
PUT8(U0IER, 0);
|
|
PUT8(U0LCR, 0x80); /* DLAB=1 */
|
|
PUT8(U0DLL, (unsigned char)(divisor & 0x00FF));
|
|
PUT8(U0DLM, (unsigned char)(divisor >> 8));
|
|
PUT8(U0LCR, 0x03); /* 8N1, DLAB=0 */
|
|
PUT8(U0FCR, 1); /* Enable RX and TX FIFOs */
|
|
}
|
|
|
|
int serial_init (void)
|
|
{
|
|
unsigned long pinsel0;
|
|
|
|
serial_setbrg ();
|
|
|
|
pinsel0 = GET32(PINSEL0);
|
|
pinsel0 &= ~(0x00000003);
|
|
pinsel0 |= 5;
|
|
PUT32(PINSEL0, pinsel0);
|
|
|
|
return (0);
|
|
}
|
|
|
|
void serial_putc (const char c)
|
|
{
|
|
if (c == '\n')
|
|
{
|
|
while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */
|
|
PUT8(U0THR, '\r');
|
|
}
|
|
|
|
while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */
|
|
PUT8(U0THR, c);
|
|
}
|
|
|
|
int serial_getc (void)
|
|
{
|
|
while((GET8(U0LSR) & 1) == 0);
|
|
return GET8(U0RBR);
|
|
}
|
|
|
|
void
|
|
serial_puts (const char *s)
|
|
{
|
|
while (*s) {
|
|
serial_putc (*s++);
|
|
}
|
|
}
|
|
|
|
/* Test if there is a byte to read */
|
|
int serial_tstc (void)
|
|
{
|
|
return (GET8(U0LSR) & 1);
|
|
}
|
|
|
|
#endif
|