blob: e3a60b6cb4313de8f83fdf293c2db0d0b9de0f8b [file] [log] [blame]
Jean-Christophe PLAGNIOL-VILLARD6790c552009-03-29 23:01:42 +02001/*
2 * (C) Copyright 2002-2004
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 <asm/arch/hardware.h>
33
34DECLARE_GLOBAL_DATA_PTR;
35
36void serial_setbrg (void)
37{
38 unsigned short divisor = 0;
39
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;
48 }
49
50 /* init serial UART0 */
51 PUT8(U0LCR, 0);
52 PUT8(U0IER, 0);
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 */
58}
59
60int serial_init (void)
61{
62 unsigned long pinsel0;
63
64 serial_setbrg ();
65
66 pinsel0 = GET32(PINSEL0);
67 pinsel0 &= ~(0x00000003);
68 pinsel0 |= 5;
69 PUT32(PINSEL0, pinsel0);
70
71 return (0);
72}
73
74void serial_putc (const char c)
75{
76 if (c == '\n')
77 {
78 while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */
79 PUT8(U0THR, '\r');
80 }
81
82 while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */
83 PUT8(U0THR, c);
84}
85
86int serial_getc (void)
87{
88 while((GET8(U0LSR) & 1) == 0);
89 return GET8(U0RBR);
90}
91
92void
93serial_puts (const char *s)
94{
95 while (*s) {
96 serial_putc (*s++);
97 }
98}
99
100/* Test if there is a byte to read */
101int serial_tstc (void)
102{
103 return (GET8(U0LSR) & 1);
104}