mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
167 lines
4 KiB
C
167 lines
4 KiB
C
/*
|
|
* (C) Copyright 2000-2004
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* See file CREDITS for list of people who contributed to this
|
|
* project.
|
|
*
|
|
* 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 <command.h>
|
|
|
|
#include <asm/mcfuart.h>
|
|
|
|
#ifdef CONFIG_M5272
|
|
#include <asm/m5272.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_M5282
|
|
#include <asm/m5282.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_M5249
|
|
#include <asm/m5249.h>
|
|
#endif
|
|
|
|
#ifdef CONFIG_M5249
|
|
#define DoubleClock(a) ((double)(CFG_CLK/2) / 32.0 / (double)(a))
|
|
#else
|
|
#define DoubleClock(a) ((double)(CFG_CLK) / 32.0 / (double)(a))
|
|
#endif
|
|
|
|
void rs_serial_setbaudrate(int port,int baudrate)
|
|
{
|
|
#if defined(CONFIG_M5272) || defined(CONFIG_M5249)
|
|
volatile unsigned char *uartp;
|
|
double clock, fraction;
|
|
|
|
if (port == 0)
|
|
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
|
|
else
|
|
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2);
|
|
|
|
clock = DoubleClock(baudrate); /* Set baud above */
|
|
|
|
fraction = ((clock - (int)clock) * 16.0) + 0.5;
|
|
|
|
uartp[MCFUART_UBG1] = (((int)clock >> 8) & 0xff); /* set msb baud */
|
|
uartp[MCFUART_UBG2] = ((int)clock & 0xff); /* set lsb baud */
|
|
uartp[MCFUART_UFPD] = ((int)fraction & 0xf); /* set baud fraction adjust */
|
|
#endif
|
|
};
|
|
|
|
void rs_serial_init(int port,int baudrate)
|
|
{
|
|
volatile unsigned char *uartp;
|
|
|
|
/*
|
|
* Reset UART, get it into known state...
|
|
*/
|
|
if (port == 0)
|
|
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
|
|
else
|
|
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2);
|
|
|
|
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */
|
|
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */
|
|
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */
|
|
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETERR; /* reset Error pointer */
|
|
|
|
/*
|
|
* Set port for CONSOLE_BAUD_RATE, 8 data bits, 1 stop bit, no parity.
|
|
*/
|
|
uartp[MCFUART_UMR] = MCFUART_MR1_PARITYNONE | MCFUART_MR1_CS8;
|
|
uartp[MCFUART_UMR] = MCFUART_MR2_STOP1;
|
|
|
|
rs_serial_setbaudrate(port,baudrate);
|
|
|
|
uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER;
|
|
uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;
|
|
|
|
return;
|
|
}
|
|
|
|
/****************************************************************************/
|
|
/*
|
|
* Output a single character, using UART polled mode.
|
|
* This is used for console output.
|
|
*/
|
|
|
|
void rs_put_char(char ch)
|
|
{
|
|
volatile unsigned char *uartp;
|
|
int i;
|
|
|
|
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
|
|
|
|
for (i = 0; (i < 0x10000); i++) {
|
|
if (uartp[MCFUART_USR] & MCFUART_USR_TXREADY)
|
|
break;
|
|
}
|
|
uartp[MCFUART_UTB] = ch;
|
|
return;
|
|
}
|
|
|
|
int rs_is_char(void)
|
|
{
|
|
volatile unsigned char *uartp;
|
|
|
|
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
|
|
return((uartp[MCFUART_USR] & MCFUART_USR_RXREADY) ? 1 : 0);
|
|
}
|
|
|
|
int rs_get_char(void)
|
|
{
|
|
volatile unsigned char *uartp;
|
|
|
|
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
|
|
return(uartp[MCFUART_URB]);
|
|
}
|
|
|
|
void serial_setbrg(void) {
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
rs_serial_setbaudrate(0,gd->bd->bi_baudrate);
|
|
}
|
|
|
|
int serial_init(void) {
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
rs_serial_init(0,gd->baudrate);
|
|
return 0;
|
|
}
|
|
|
|
|
|
void serial_putc(const char c) {
|
|
if (c == '\n')
|
|
serial_putc ('\r');
|
|
rs_put_char(c);
|
|
}
|
|
|
|
void serial_puts (const char *s) {
|
|
while (*s) {
|
|
serial_putc(*s++);
|
|
}
|
|
}
|
|
|
|
int serial_getc(void) {
|
|
while(!rs_is_char());
|
|
return rs_get_char();
|
|
}
|
|
|
|
int serial_tstc() {
|
|
return rs_is_char();
|
|
}
|