2 * (C) Copyright 2004, 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,
30 DECLARE_GLOBAL_DATA_PTR;
32 /*------------------------------------------------------------------
33 * JTAG acts as the serial port
34 *-----------------------------------------------------------------*/
35 #if defined(CONFIG_CONSOLE_JTAG)
37 static nios_jtag_t *jtag = (nios_jtag_t *)CFG_NIOS_CONSOLE;
39 void serial_setbrg( void ){ return; }
40 int serial_init( void ) { return(0);}
42 void serial_putc (char c)
46 while (NIOS_JTAG_WSPACE ( readl (&jtag->control)) == 0)
48 writel (&jtag->data, (unsigned char)c);
51 void serial_puts (const char *s)
57 int serial_tstc (void)
59 return ( readl (&jtag->control) & NIOS_JTAG_RRDY);
62 int serial_getc (void)
69 val = readl (&jtag->data);
70 if (val & NIOS_JTAG_RVALID)
77 /*------------------------------------------------------------------
78 * UART the serial port
79 *-----------------------------------------------------------------*/
82 static nios_uart_t *uart = (nios_uart_t *) CFG_NIOS_CONSOLE;
84 #if defined(CFG_NIOS_FIXEDBAUD)
86 /* Everything's already setup for fixed-baud PTF
89 void serial_setbrg (void){ return; }
90 int serial_init (void) { return (0);}
94 void serial_setbrg (void)
98 div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1;
99 writel (&uart->divisor,div);
103 int serial_init (void)
109 #endif /* CFG_NIOS_FIXEDBAUD */
112 /*-----------------------------------------------------------------------
114 *---------------------------------------------------------------------*/
115 void serial_putc (char c)
119 while ((readl (&uart->status) & NIOS_UART_TRDY) == 0)
121 writel (&uart->txdata,(unsigned char)c);
124 void serial_puts (const char *s)
131 int serial_tstc (void)
133 return (readl (&uart->status) & NIOS_UART_RRDY);
136 int serial_getc (void)
138 while (serial_tstc () == 0)
140 return (readl (&uart->rxdata) & 0x00ff );
143 #endif /* CONFIG_JTAG_CONSOLE */