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wdenk4a551702003-10-08 23:26:14 +00001/*
2 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
4 *
5 * See file CREDITS for list of people who contributed to this
6 * project.
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21 * MA 02111-1307 USA
22 */
23
24
25#include <common.h>
wdenk028ab6b2004-02-23 23:54:43 +000026#include <watchdog.h>
wdenk4a551702003-10-08 23:26:14 +000027#include <nios-io.h>
28
Wolfgang Denkd87080b2006-03-31 18:32:53 +020029DECLARE_GLOBAL_DATA_PTR;
30
wdenke4cc71a2004-05-19 21:33:14 +000031/*------------------------------------------------------------------
32 * JTAG acts as the serial port
33 *-----------------------------------------------------------------*/
34#if defined(CONFIG_CONSOLE_JTAG)
35
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020036static nios_jtag_t *jtag = (nios_jtag_t *)CONFIG_SYS_NIOS_CONSOLE;
wdenke4cc71a2004-05-19 21:33:14 +000037
38void serial_setbrg( void ){ return; }
39int serial_init( void ) { return(0);}
40
41void serial_putc (char c)
42{
43 while ((jtag->txcntl & NIOS_JTAG_TRDY) != 0)
44 WATCHDOG_RESET ();
45 jtag->txcntl = NIOS_JTAG_TRDY | (unsigned char)c;
46}
47
48void serial_puts (const char *s)
49{
50 while (*s != 0)
51 serial_putc (*s++);
52}
53
54int serial_tstc (void)
55{
56 return (jtag->rxcntl & NIOS_JTAG_RRDY);
57}
58
59int serial_getc (void)
60{
61 int c;
62 while (serial_tstc() == 0)
63 WATCHDOG_RESET ();
64 c = jtag->rxcntl & 0x0ff;
65 jtag->rxcntl = 0;
66 return (c);
67}
68
69/*------------------------------------------------------------------
70 * UART the serial port
71 *-----------------------------------------------------------------*/
72#else
wdenk4a551702003-10-08 23:26:14 +000073
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020074static nios_uart_t *uart = (nios_uart_t *)CONFIG_SYS_NIOS_CONSOLE;
wdenk4a551702003-10-08 23:26:14 +000075
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +020076#if defined(CONFIG_SYS_NIOS_FIXEDBAUD)
wdenk4a551702003-10-08 23:26:14 +000077
78/* Everything's already setup for fixed-baud PTF
79 * assignment
80 */
wdenke4cc71a2004-05-19 21:33:14 +000081void serial_setbrg (void){ return; }
82int serial_init (void) { return (0);}
wdenk4a551702003-10-08 23:26:14 +000083
84#else
85
wdenke4cc71a2004-05-19 21:33:14 +000086void serial_setbrg (void)
wdenk4a551702003-10-08 23:26:14 +000087{
wdenk4a551702003-10-08 23:26:14 +000088 unsigned div;
89
90 div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1;
91 uart->divisor = div;
92 return;
93}
94
wdenke4cc71a2004-05-19 21:33:14 +000095int serial_init (void)
wdenk4a551702003-10-08 23:26:14 +000096{
wdenke4cc71a2004-05-19 21:33:14 +000097 serial_setbrg ();
98 return (0);
wdenk4a551702003-10-08 23:26:14 +000099}
100
Jean-Christophe PLAGNIOL-VILLARD6d0f6bc2008-10-16 15:01:15 +0200101#endif /* CONFIG_SYS_NIOS_FIXEDBAUD */
wdenk4a551702003-10-08 23:26:14 +0000102
103
wdenke4cc71a2004-05-19 21:33:14 +0000104/*-----------------------------------------------------------------------
105 * UART CONSOLE
106 *---------------------------------------------------------------------*/
107void serial_putc (char c)
wdenk4a551702003-10-08 23:26:14 +0000108{
109 if (c == '\n')
wdenke4cc71a2004-05-19 21:33:14 +0000110 serial_putc ('\r');
111 while ((uart->status & NIOS_UART_TRDY) == 0)
wdenk028ab6b2004-02-23 23:54:43 +0000112 WATCHDOG_RESET ();
wdenk4a551702003-10-08 23:26:14 +0000113 uart->txdata = (unsigned char)c;
114}
115
wdenke4cc71a2004-05-19 21:33:14 +0000116void serial_puts (const char *s)
wdenk4a551702003-10-08 23:26:14 +0000117{
wdenke4cc71a2004-05-19 21:33:14 +0000118 while (*s != 0) {
119 serial_putc (*s++);
wdenk4a551702003-10-08 23:26:14 +0000120 }
121}
122
wdenke4cc71a2004-05-19 21:33:14 +0000123int serial_tstc (void)
wdenk4a551702003-10-08 23:26:14 +0000124{
wdenke4cc71a2004-05-19 21:33:14 +0000125 return (uart->status & NIOS_UART_RRDY);
wdenk4a551702003-10-08 23:26:14 +0000126}
127
wdenke4cc71a2004-05-19 21:33:14 +0000128int serial_getc (void)
wdenk4a551702003-10-08 23:26:14 +0000129{
wdenke4cc71a2004-05-19 21:33:14 +0000130 while (serial_tstc () == 0)
wdenk028ab6b2004-02-23 23:54:43 +0000131 WATCHDOG_RESET ();
wdenk4a551702003-10-08 23:26:14 +0000132 return( uart->rxdata & 0x00ff );
133}
wdenke4cc71a2004-05-19 21:33:14 +0000134
135#endif /* CONFIG_JTAG_CONSOLE */