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21310b5750
Implement support for CONFIG_SERIAL_MULTI into lpc2292 serial driver. This driver was so far only usable directly, but this patch also adds support for the multi method. This allows using more than one serial driver alongside the lpc2292 driver. Also, add a weak implementation of default_serial_console() returning this driver. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Marek Vasut <marek.vasut@gmail.com> Cc: Tom Rini <trini@ti.com>
157 lines
3.3 KiB
C
157 lines
3.3 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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#include <asm/arch/hardware.h>
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DECLARE_GLOBAL_DATA_PTR;
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static void lpc2292_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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static int lpc2292_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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static void lpc2292_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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static int lpc2292_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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static void lpc2292_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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static int lpc2292_serial_tstc(void)
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{
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return (GET8(U0LSR) & 1);
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}
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#ifdef CONFIG_SERIAL_MULTI
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static struct serial_device lpc2292_serial_drv = {
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.name = "lpc2292_serial",
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.start = lpc2292_serial_init,
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.stop = NULL,
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.setbrg = lpc2292_serial_setbrg,
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.putc = lpc2292_serial_putc,
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.puts = lpc2292_serial_puts,
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.getc = lpc2292_serial_getc,
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.tstc = lpc2292_serial_tstc,
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};
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void lpc2292_serial_initialize(void)
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{
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serial_register(&lpc2292_serial_drv);
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}
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__weak struct serial_device *default_serial_console(void)
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{
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return &lpc2292_serial_drv;
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}
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#else
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int serial_init(void)
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{
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return lpc2292_serial_init();
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}
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void serial_setbrg(void)
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{
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lpc2292_serial_setbrg();
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}
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void serial_putc(const char c)
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{
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lpc2292_serial_putc(c);
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}
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void serial_puts(const char *s)
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{
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lpc2292_serial_puts(s);
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}
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int serial_getc(void)
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{
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return lpc2292_serial_getc();
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}
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int serial_tstc(void)
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{
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return lpc2292_serial_tstc();
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}
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#endif
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