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