[people/ms/u-boot.git] / drivers / serial / serial_sa1100.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++);
	}
}
Commit	Line	Data
fe8c2806 WD	1	/*
	2	* (C) Copyright 2002
	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>
	32	#include <SA-1100.h>
	33
d87080b7 WD	34	DECLARE_GLOBAL_DATA_PTR;
d87080b7 WD	35
fe8c2806 WD	36	void serial_setbrg (void)
fe8c2806 WD	37	{
fe8c2806 WD	38	unsigned int reg = 0;
	39
	40	if (gd->baudrate == 1200)
	41	reg = 191;
	42	else if (gd->baudrate == 9600)
	43	reg = 23;
	44	else if (gd->baudrate == 19200)
	45	reg = 11;
	46	else if (gd->baudrate == 38400)
	47	reg = 5;
	48	else if (gd->baudrate == 57600)
	49	reg = 3;
	50	else if (gd->baudrate == 115200)
	51	reg = 1;
	52	else
	53	hang ();
	54
	55	#ifdef CONFIG_SERIAL1
dc7c9a1a WD	56	/* SA1110 uart function */
	57	Ser1SDCR0 \|= SDCR0_SUS;
	58
fe8c2806	59	/* Wait until port is ready ... */
dc7c9a1a	60	while(Ser1UTSR1 & UTSR1_TBY) {}
fe8c2806 WD	61
	62	/* init serial serial 1 */
	63	Ser1UTCR3 = 0x00;
	64	Ser1UTSR0 = 0xff;
dc7c9a1a	65	Ser1UTCR0 = ( UTCR0_1StpBit \| UTCR0_8BitData );
fe8c2806	66	Ser1UTCR1 = 0;
dc7c9a1a WD	67	Ser1UTCR2 = (u32)reg;
dc7c9a1a WD	68	Ser1UTCR3 = ( UTCR3_RXE \| UTCR3_TXE );
42dfe7a1	69	#elif defined(CONFIG_SERIAL3)
fe8c2806 WD	70	/* Wait until port is ready ... */
	71	while (Ser3UTSR1 & UTSR1_TBY) {
	72	}
	73
	74	/* init serial serial 3 */
	75	Ser3UTCR3 = 0x00;
	76	Ser3UTSR0 = 0xff;
	77	Ser3UTCR0 = (UTCR0_1StpBit \| UTCR0_8BitData);
	78	Ser3UTCR1 = 0;
	79	Ser3UTCR2 = (u32) reg;
	80	Ser3UTCR3 = (UTCR3_RXE \| UTCR3_TXE);
	81	#else
	82	#error "Bad: you didn't configured serial ..."
	83	#endif
	84	}
	85
	86
	87	/*
	88	* Initialise the serial port with the given baudrate. The settings
	89	* are always 8 data bits, no parity, 1 stop bit, no start bits.
	90	*
	91	*/
	92	int serial_init (void)
	93	{
	94	serial_setbrg ();
	95
	96	return (0);
	97	}
	98
	99
	100	/*
	101	* Output a single byte to the serial port.
	102	*/
	103	void serial_putc (const char c)
	104	{
	105	#ifdef CONFIG_SERIAL1
	106	/* wait for room in the tx FIFO on SERIAL1 */
	107	while ((Ser1UTSR0 & UTSR0_TFS) == 0);
	108
	109	Ser1UTDR = c;
42dfe7a1	110	#elif defined(CONFIG_SERIAL3)
fe8c2806 WD	111	/* wait for room in the tx FIFO on SERIAL3 */
	112	while ((Ser3UTSR0 & UTSR0_TFS) == 0);
	113
	114	Ser3UTDR = c;
	115	#endif
	116
	117	/* If \n, also do \r */
	118	if (c == '\n')
	119	serial_putc ('\r');
	120	}
	121
	122	/*
	123	* Read a single byte from the serial port. Returns 1 on success, 0
	124	* otherwise. When the function is succesfull, the character read is
	125	* written into its argument c.
	126	*/
	127	int serial_tstc (void)
	128	{
	129	#ifdef CONFIG_SERIAL1
	130	return Ser1UTSR1 & UTSR1_RNE;
42dfe7a1	131	#elif defined(CONFIG_SERIAL3)
fe8c2806 WD	132	return Ser3UTSR1 & UTSR1_RNE;
	133	#endif
	134	}
	135
	136	/*
	137	* Read a single byte from the serial port. Returns 1 on success, 0
	138	* otherwise. When the function is succesfull, the character read is
	139	* written into its argument c.
	140	*/
	141	int serial_getc (void)
	142	{
	143	#ifdef CONFIG_SERIAL1
	144	while (!(Ser1UTSR1 & UTSR1_RNE));
	145
	146	return (char) Ser1UTDR & 0xff;
42dfe7a1	147	#elif defined(CONFIG_SERIAL3)
fe8c2806 WD	148	while (!(Ser3UTSR1 & UTSR1_RNE));
	149
	150	return (char) Ser3UTDR & 0xff;
	151	#endif
	152	}
	153
	154	void
	155	serial_puts (const char *s)
	156	{
	157	while (*s) {
	158	serial_putc (*s++);
	159	}
	160	}