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wdenkedc48b62002-09-08 17:56:50 +00001/*
wdenk39539882004-07-01 16:30:44 +00002 * (C) Copyright 2002-2004
wdenkedc48b62002-09-08 17:56:50 +00003 * 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>
wdenk39539882004-07-01 16:30:44 +000032#include <clps7111.h>
wdenk2d1a5372004-02-23 19:30:57 +000033
Wolfgang Denkd87080b2006-03-31 18:32:53 +020034DECLARE_GLOBAL_DATA_PTR;
35
wdenkedc48b62002-09-08 17:56:50 +000036void serial_setbrg (void)
37{
wdenkedc48b62002-09-08 17:56:50 +000038 unsigned int reg = 0;
39
wdenk39539882004-07-01 16:30:44 +000040 switch (gd->baudrate) {
41 case 1200: reg = 191; break;
42 case 9600: reg = 23; break;
43 case 19200: reg = 11; break;
44 case 38400: reg = 5; break;
45 case 57600: reg = 3; break;
46 case 115200: reg = 1; break;
47 default: hang (); break;
48 }
wdenkedc48b62002-09-08 17:56:50 +000049
50 /* init serial serial 1,2 */
51 IO_SYSCON1 = SYSCON1_UART1EN;
52 IO_SYSCON2 = SYSCON2_UART2EN;
53
54 reg |= UBRLCR_WRDLEN8;
55
56 IO_UBRLCR1 = reg;
57 IO_UBRLCR2 = reg;
58}
59
60
61/*
62 * Initialise the serial port with the given baudrate. The settings
63 * are always 8 data bits, no parity, 1 stop bit, no start bits.
64 *
65 */
66int serial_init (void)
67{
68 serial_setbrg ();
69
70 return (0);
71}
72
73
74/*
75 * Output a single byte to the serial port.
76 */
77void serial_putc (const char c)
78{
79 int tmo;
80
81 /* If \n, also do \r */
82 if (c == '\n')
83 serial_putc ('\r');
84
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020085 tmo = get_timer (0) + 1 * CONFIG_SYS_HZ;
wdenkedc48b62002-09-08 17:56:50 +000086 while (IO_SYSFLG1 & SYSFLG1_UTXFF)
87 if (get_timer (0) > tmo)
88 break;
89
90 IO_UARTDR1 = c;
91}
92
93/*
94 * Read a single byte from the serial port. Returns 1 on success, 0
95 * otherwise. When the function is succesfull, the character read is
96 * written into its argument c.
97 */
98int serial_tstc (void)
99{
100 return !(IO_SYSFLG1 & SYSFLG1_URXFE);
101}
102
103/*
104 * Read a single byte from the serial port. Returns 1 on success, 0
105 * otherwise. When the function is succesfull, the character read is
106 * written into its argument c.
107 */
108int serial_getc (void)
109{
110 while (IO_SYSFLG1 & SYSFLG1_URXFE);
111
112 return IO_UARTDR1 & 0xff;
113}
114
115void
116serial_puts (const char *s)
117{
118 while (*s) {
119 serial_putc (*s++);
120 }
121}