mirror of
https://github.com/AsahiLinux/u-boot
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160 lines
3.5 KiB
C
160 lines
3.5 KiB
C
/*
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* (C) Copyright 2002
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* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Alex Zuepke <azu@sysgo.de>
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*
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* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <SA-1100.h>
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void serial_setbrg (void)
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{
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DECLARE_GLOBAL_DATA_PTR;
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unsigned int reg = 0;
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if (gd->baudrate == 1200)
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reg = 191;
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else if (gd->baudrate == 9600)
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reg = 23;
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else if (gd->baudrate == 19200)
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reg = 11;
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else if (gd->baudrate == 38400)
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reg = 5;
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else if (gd->baudrate == 57600)
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reg = 3;
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else if (gd->baudrate == 115200)
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reg = 1;
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else
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hang ();
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#ifdef CONFIG_SERIAL1
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/* SA1110 uart function */
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Ser1SDCR0 |= SDCR0_SUS;
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/* Wait until port is ready ... */
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while(Ser1UTSR1 & UTSR1_TBY) {}
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/* init serial serial 1 */
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Ser1UTCR3 = 0x00;
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Ser1UTSR0 = 0xff;
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Ser1UTCR0 = ( UTCR0_1StpBit | UTCR0_8BitData );
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Ser1UTCR1 = 0;
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Ser1UTCR2 = (u32)reg;
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Ser1UTCR3 = ( UTCR3_RXE | UTCR3_TXE );
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#elif defined(CONFIG_SERIAL3)
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/* Wait until port is ready ... */
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while (Ser3UTSR1 & UTSR1_TBY) {
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}
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/* init serial serial 3 */
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Ser3UTCR3 = 0x00;
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Ser3UTSR0 = 0xff;
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Ser3UTCR0 = (UTCR0_1StpBit | UTCR0_8BitData);
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Ser3UTCR1 = 0;
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Ser3UTCR2 = (u32) reg;
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Ser3UTCR3 = (UTCR3_RXE | UTCR3_TXE);
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#else
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#error "Bad: you didn't configured serial ..."
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#endif
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}
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/*
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* Initialise the serial port with the given baudrate. The settings
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* are always 8 data bits, no parity, 1 stop bit, no start bits.
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*
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*/
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int serial_init (void)
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{
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serial_setbrg ();
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return (0);
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}
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/*
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* Output a single byte to the serial port.
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*/
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void serial_putc (const char c)
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{
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#ifdef CONFIG_SERIAL1
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/* wait for room in the tx FIFO on SERIAL1 */
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while ((Ser1UTSR0 & UTSR0_TFS) == 0);
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Ser1UTDR = c;
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#elif defined(CONFIG_SERIAL3)
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/* wait for room in the tx FIFO on SERIAL3 */
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while ((Ser3UTSR0 & UTSR0_TFS) == 0);
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Ser3UTDR = c;
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#endif
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/* If \n, also do \r */
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if (c == '\n')
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serial_putc ('\r');
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}
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/*
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* Read a single byte from the serial port. Returns 1 on success, 0
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* otherwise. When the function is succesfull, the character read is
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* written into its argument c.
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*/
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int serial_tstc (void)
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{
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#ifdef CONFIG_SERIAL1
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return Ser1UTSR1 & UTSR1_RNE;
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#elif defined(CONFIG_SERIAL3)
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return Ser3UTSR1 & UTSR1_RNE;
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#endif
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}
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/*
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* Read a single byte from the serial port. Returns 1 on success, 0
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* otherwise. When the function is succesfull, the character read is
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* written into its argument c.
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*/
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int serial_getc (void)
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{
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#ifdef CONFIG_SERIAL1
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while (!(Ser1UTSR1 & UTSR1_RNE));
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return (char) Ser1UTDR & 0xff;
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#elif defined(CONFIG_SERIAL3)
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while (!(Ser3UTSR1 & UTSR1_RNE));
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return (char) Ser3UTDR & 0xff;
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#endif
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}
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void
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serial_puts (const char *s)
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{
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while (*s) {
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serial_putc (*s++);
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}
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}
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