[people/ms/u-boot.git] / drivers / serial / serial_clps7111.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>
#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 * CONFIG_SYS_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++);
	}
}
Commit	Line	Data
edc48b66	1	/*
39539887	2	* (C) Copyright 2002-2004
edc48b66 WD	3	* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
	4	*
	5	* (C) Copyright 2002
	6	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	7	* Marius Groeger <mgroeger@sysgo.de>
	8	*
	9	* (C) Copyright 2002
	10	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	11	* Alex Zuepke <azu@sysgo.de>
	12	*
	13	* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
	14	*
	15	* This program is free software; you can redistribute it and/or modify
	16	* it under the terms of the GNU General Public License as published by
	17	* the Free Software Foundation; either version 2 of the License, or
	18	* (at your option) any later version.
	19	*
	20	* This program is distributed in the hope that it will be useful,
	21	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	23	* GNU General Public License for more details.
	24	*
	25	* You should have received a copy of the GNU General Public License
	26	* along with this program; if not, write to the Free Software
	27	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	28	*
	29	*/
	30
	31	#include <common.h>
39539887	32	#include <clps7111.h>
2d1a537d	33
d87080b7 WD	34	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	35
edc48b66 WD	36	void serial_setbrg (void)
edc48b66 WD	37	{
edc48b66 WD	38	unsigned int reg = 0;
edc48b66 WD	39
39539887 WD	40	switch (gd->baudrate) {
	41	case 1200: reg = 191; break;
	42	case 9600: reg = 23; break;
	43	case 19200: reg = 11; break;
	44	case 38400: reg = 5; break;
	45	case 57600: reg = 3; break;
	46	case 115200: reg = 1; break;
	47	default: hang (); break;
	48	}
edc48b66 WD	49
	50	/* init serial serial 1,2 */
	51	IO_SYSCON1 = SYSCON1_UART1EN;
	52	IO_SYSCON2 = SYSCON2_UART2EN;
	53
	54	reg \|= UBRLCR_WRDLEN8;
	55
	56	IO_UBRLCR1 = reg;
	57	IO_UBRLCR2 = reg;
	58	}
	59
	60
	61	/*
	62	* Initialise the serial port with the given baudrate. The settings
	63	* are always 8 data bits, no parity, 1 stop bit, no start bits.
	64	*
	65	*/
	66	int serial_init (void)
	67	{
	68	serial_setbrg ();
	69
	70	return (0);
	71	}
	72
	73
	74	/*
	75	* Output a single byte to the serial port.
	76	*/
	77	void serial_putc (const char c)
	78	{
	79	int tmo;
	80
	81	/* If \n, also do \r */
	82	if (c == '\n')
	83	serial_putc ('\r');
	84
6d0f6bcf	85	tmo = get_timer (0) + 1 * CONFIG_SYS_HZ;
edc48b66 WD	86	while (IO_SYSFLG1 & SYSFLG1_UTXFF)
	87	if (get_timer (0) > tmo)
	88	break;
	89
	90	IO_UARTDR1 = c;
	91	}
	92
	93	/*
	94	* Read a single byte from the serial port. Returns 1 on success, 0
	95	* otherwise. When the function is succesfull, the character read is
	96	* written into its argument c.
	97	*/
	98	int serial_tstc (void)
	99	{
	100	return !(IO_SYSFLG1 & SYSFLG1_URXFE);
	101	}
	102
	103	/*
	104	* Read a single byte from the serial port. Returns 1 on success, 0
	105	* otherwise. When the function is succesfull, the character read is
	106	* written into its argument c.
	107	*/
	108	int serial_getc (void)
	109	{
	110	while (IO_SYSFLG1 & SYSFLG1_URXFE);
	111
	112	return IO_UARTDR1 & 0xff;
	113	}
	114
	115	void
	116	serial_puts (const char *s)
	117	{
	118	while (*s) {
	119	serial_putc (*s++);
	120	}
	121	}