2 * (C) Copyright 2002-2004
3 * Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
6 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
7 * Marius Groeger <mgroeger@sysgo.de>
10 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
11 * Alex Zuepke <azu@sysgo.de>
13 * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
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.
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.
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
32 #include <asm/arch/hardware.h>
34 DECLARE_GLOBAL_DATA_PTR;
36 static void lpc2292_serial_setbrg(void)
38 unsigned short divisor = 0;
40 switch (gd->baudrate) {
41 case 1200: divisor = 3072; break;
42 case 9600: divisor = 384; break;
43 case 19200: divisor = 192; break;
44 case 38400: divisor = 96; break;
45 case 57600: divisor = 64; break;
46 case 115200: divisor = 32; break;
47 default: hang (); break;
50 /* init serial UART0 */
53 PUT8(U0LCR, 0x80); /* DLAB=1 */
54 PUT8(U0DLL, (unsigned char)(divisor & 0x00FF));
55 PUT8(U0DLM, (unsigned char)(divisor >> 8));
56 PUT8(U0LCR, 0x03); /* 8N1, DLAB=0 */
57 PUT8(U0FCR, 1); /* Enable RX and TX FIFOs */
60 static int lpc2292_serial_init(void)
62 unsigned long pinsel0;
66 pinsel0 = GET32(PINSEL0);
67 pinsel0 &= ~(0x00000003);
69 PUT32(PINSEL0, pinsel0);
74 static void lpc2292_serial_putc(const char c)
78 while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */
82 while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */
86 static int lpc2292_serial_getc(void)
88 while((GET8(U0LSR) & 1) == 0);
92 static void lpc2292_serial_puts(const char *s)
99 /* Test if there is a byte to read */
100 static int lpc2292_serial_tstc(void)
102 return (GET8(U0LSR) & 1);
105 #ifdef CONFIG_SERIAL_MULTI
106 static struct serial_device lpc2292_serial_drv = {
107 .name = "lpc2292_serial",
108 .start = lpc2292_serial_init,
110 .setbrg = lpc2292_serial_setbrg,
111 .putc = lpc2292_serial_putc,
112 .puts = lpc2292_serial_puts,
113 .getc = lpc2292_serial_getc,
114 .tstc = lpc2292_serial_tstc,
117 void lpc2292_serial_initialize(void)
119 serial_register(&lpc2292_serial_drv);
122 __weak struct serial_device *default_serial_console(void)
124 return &lpc2292_serial_drv;
127 int serial_init(void)
129 return lpc2292_serial_init();
132 void serial_setbrg(void)
134 lpc2292_serial_setbrg();
137 void serial_putc(const char c)
139 lpc2292_serial_putc(c);
142 void serial_puts(const char *s)
144 lpc2292_serial_puts(s);
147 int serial_getc(void)
149 return lpc2292_serial_getc();
152 int serial_tstc(void)
154 return lpc2292_serial_tstc();