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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>
wdenkedc48b62002-09-08 17:56:50 +000032
Wolfgang Denkc570b2f2005-09-26 01:06:33 +020033#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO)
wdenk39539882004-07-01 16:30:44 +000034
35#include <clps7111.h>
wdenk2d1a5372004-02-23 19:30:57 +000036
Wolfgang Denkd87080b2006-03-31 18:32:53 +020037DECLARE_GLOBAL_DATA_PTR;
38
wdenkedc48b62002-09-08 17:56:50 +000039void serial_setbrg (void)
40{
wdenkedc48b62002-09-08 17:56:50 +000041 unsigned int reg = 0;
42
wdenk39539882004-07-01 16:30:44 +000043 switch (gd->baudrate) {
44 case 1200: reg = 191; break;
45 case 9600: reg = 23; break;
46 case 19200: reg = 11; break;
47 case 38400: reg = 5; break;
48 case 57600: reg = 3; break;
49 case 115200: reg = 1; break;
50 default: hang (); break;
51 }
wdenkedc48b62002-09-08 17:56:50 +000052
53 /* init serial serial 1,2 */
54 IO_SYSCON1 = SYSCON1_UART1EN;
55 IO_SYSCON2 = SYSCON2_UART2EN;
56
57 reg |= UBRLCR_WRDLEN8;
58
59 IO_UBRLCR1 = reg;
60 IO_UBRLCR2 = reg;
61}
62
63
64/*
65 * Initialise the serial port with the given baudrate. The settings
66 * are always 8 data bits, no parity, 1 stop bit, no start bits.
67 *
68 */
69int serial_init (void)
70{
71 serial_setbrg ();
72
73 return (0);
74}
75
76
77/*
78 * Output a single byte to the serial port.
79 */
80void serial_putc (const char c)
81{
82 int tmo;
83
84 /* If \n, also do \r */
85 if (c == '\n')
86 serial_putc ('\r');
87
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020088 tmo = get_timer (0) + 1 * CONFIG_SYS_HZ;
wdenkedc48b62002-09-08 17:56:50 +000089 while (IO_SYSFLG1 & SYSFLG1_UTXFF)
90 if (get_timer (0) > tmo)
91 break;
92
93 IO_UARTDR1 = c;
94}
95
96/*
97 * Read a single byte from the serial port. Returns 1 on success, 0
98 * otherwise. When the function is succesfull, the character read is
99 * written into its argument c.
100 */
101int serial_tstc (void)
102{
103 return !(IO_SYSFLG1 & SYSFLG1_URXFE);
104}
105
106/*
107 * Read a single byte from the serial port. Returns 1 on success, 0
108 * otherwise. When the function is succesfull, the character read is
109 * written into its argument c.
110 */
111int serial_getc (void)
112{
113 while (IO_SYSFLG1 & SYSFLG1_URXFE);
114
115 return IO_UARTDR1 & 0xff;
116}
117
118void
119serial_puts (const char *s)
120{
121 while (*s) {
122 serial_putc (*s++);
123 }
124}
wdenk2d1a5372004-02-23 19:30:57 +0000125
Gary Jennejohn6bd24472007-01-24 12:16:56 +0100126#elif defined(CONFIG_LPC2292)
127
Jean-Christophe PLAGNIOL-VILLARD86ec86c2007-09-27 23:27:47 +0200128DECLARE_GLOBAL_DATA_PTR;
129
Gary Jennejohn6bd24472007-01-24 12:16:56 +0100130#include <asm/arch/hardware.h>
131
132void serial_setbrg (void)
133{
Gary Jennejohn6bd24472007-01-24 12:16:56 +0100134 unsigned short divisor = 0;
135
136 switch (gd->baudrate) {
137 case 1200: divisor = 3072; break;
138 case 9600: divisor = 384; break;
139 case 19200: divisor = 192; break;
140 case 38400: divisor = 96; break;
141 case 57600: divisor = 64; break;
142 case 115200: divisor = 32; break;
143 default: hang (); break;
144 }
145
146 /* init serial UART0 */
147 PUT8(U0LCR, 0);
148 PUT8(U0IER, 0);
149 PUT8(U0LCR, 0x80); /* DLAB=1 */
150 PUT8(U0DLL, (unsigned char)(divisor & 0x00FF));
151 PUT8(U0DLM, (unsigned char)(divisor >> 8));
152 PUT8(U0LCR, 0x03); /* 8N1, DLAB=0 */
153 PUT8(U0FCR, 1); /* Enable RX and TX FIFOs */
154}
155
156int serial_init (void)
157{
158 unsigned long pinsel0;
159
160 serial_setbrg ();
161
162 pinsel0 = GET32(PINSEL0);
163 pinsel0 &= ~(0x00000003);
164 pinsel0 |= 5;
165 PUT32(PINSEL0, pinsel0);
166
167 return (0);
168}
169
170void serial_putc (const char c)
171{
172 if (c == '\n')
173 {
174 while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */
175 PUT8(U0THR, '\r');
176 }
177
178 while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */
179 PUT8(U0THR, c);
180}
181
182int serial_getc (void)
183{
184 while((GET8(U0LSR) & 1) == 0);
185 return GET8(U0RBR);
186}
187
188void
189serial_puts (const char *s)
190{
191 while (*s) {
192 serial_putc (*s++);
193 }
194}
195
196/* Test if there is a byte to read */
197int serial_tstc (void)
198{
199 return (GET8(U0LSR) & 1);
200}
201
202#endif