2 * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
3 * Scott McNutt <smcnutt@psyent.com>
5 * See file CREDITS for list of people who contributed to this
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.
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.
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,
29 /*------------------------------------------------------------------
30 * JTAG acts as the serial port
31 *-----------------------------------------------------------------*/
32 #if defined(CONFIG_CONSOLE_JTAG)
34 static nios_jtag_t *jtag = (nios_jtag_t *)CFG_NIOS_CONSOLE;
36 void serial_setbrg( void ){ return; }
37 int serial_init( void ) { return(0);}
39 void serial_putc (char c)
41 while ((jtag->txcntl & NIOS_JTAG_TRDY) != 0)
43 jtag->txcntl = NIOS_JTAG_TRDY | (unsigned char)c;
46 void serial_puts (const char *s)
52 int serial_tstc (void)
54 return (jtag->rxcntl & NIOS_JTAG_RRDY);
57 int serial_getc (void)
60 while (serial_tstc() == 0)
62 c = jtag->rxcntl & 0x0ff;
67 /*------------------------------------------------------------------
68 * UART the serial port
69 *-----------------------------------------------------------------*/
72 static nios_uart_t *uart = (nios_uart_t *)CFG_NIOS_CONSOLE;
74 #if defined(CFG_NIOS_FIXEDBAUD)
76 /* Everything's already setup for fixed-baud PTF
79 void serial_setbrg (void){ return; }
80 int serial_init (void) { return (0);}
84 void serial_setbrg (void)
86 DECLARE_GLOBAL_DATA_PTR;
89 div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1;
94 int serial_init (void)
100 #endif /* CFG_NIOS_FIXEDBAUD */
103 /*-----------------------------------------------------------------------
105 *---------------------------------------------------------------------*/
106 void serial_putc (char c)
110 while ((uart->status & NIOS_UART_TRDY) == 0)
112 uart->txdata = (unsigned char)c;
115 void serial_puts (const char *s)
122 int serial_tstc (void)
124 return (uart->status & NIOS_UART_RRDY);
127 int serial_getc (void)
129 while (serial_tstc () == 0)
131 return( uart->rxdata & 0x00ff );
134 #endif /* CONFIG_JTAG_CONSOLE */