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1 | /* |
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> | |
028ab6b5 | 26 | #include <watchdog.h> |
4a551709 WD |
27 | #include <nios-io.h> |
28 | ||
d87080b7 WD |
29 | DECLARE_GLOBAL_DATA_PTR; |
30 | ||
e4cc71aa WD |
31 | /*------------------------------------------------------------------ |
32 | * JTAG acts as the serial port | |
33 | *-----------------------------------------------------------------*/ | |
34 | #if defined(CONFIG_CONSOLE_JTAG) | |
35 | ||
6d0f6bcf | 36 | static nios_jtag_t *jtag = (nios_jtag_t *)CONFIG_SYS_NIOS_CONSOLE; |
e4cc71aa WD |
37 | |
38 | void serial_setbrg( void ){ return; } | |
39 | int serial_init( void ) { return(0);} | |
40 | ||
41 | void 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 | ||
48 | void serial_puts (const char *s) | |
49 | { | |
50 | while (*s != 0) | |
51 | serial_putc (*s++); | |
52 | } | |
53 | ||
54 | int serial_tstc (void) | |
55 | { | |
56 | return (jtag->rxcntl & NIOS_JTAG_RRDY); | |
57 | } | |
58 | ||
59 | int 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 | |
4a551709 | 73 | |
6d0f6bcf | 74 | static nios_uart_t *uart = (nios_uart_t *)CONFIG_SYS_NIOS_CONSOLE; |
4a551709 | 75 | |
6d0f6bcf | 76 | #if defined(CONFIG_SYS_NIOS_FIXEDBAUD) |
4a551709 WD |
77 | |
78 | /* Everything's already setup for fixed-baud PTF | |
79 | * assignment | |
80 | */ | |
e4cc71aa WD |
81 | void serial_setbrg (void){ return; } |
82 | int serial_init (void) { return (0);} | |
4a551709 WD |
83 | |
84 | #else | |
85 | ||
e4cc71aa | 86 | void serial_setbrg (void) |
4a551709 | 87 | { |
4a551709 WD |
88 | unsigned div; |
89 | ||
90 | div = (CONFIG_SYS_CLK_FREQ/gd->baudrate)-1; | |
91 | uart->divisor = div; | |
92 | return; | |
93 | } | |
94 | ||
e4cc71aa | 95 | int serial_init (void) |
4a551709 | 96 | { |
e4cc71aa WD |
97 | serial_setbrg (); |
98 | return (0); | |
4a551709 WD |
99 | } |
100 | ||
6d0f6bcf | 101 | #endif /* CONFIG_SYS_NIOS_FIXEDBAUD */ |
4a551709 WD |
102 | |
103 | ||
e4cc71aa WD |
104 | /*----------------------------------------------------------------------- |
105 | * UART CONSOLE | |
106 | *---------------------------------------------------------------------*/ | |
107 | void serial_putc (char c) | |
4a551709 WD |
108 | { |
109 | if (c == '\n') | |
e4cc71aa WD |
110 | serial_putc ('\r'); |
111 | while ((uart->status & NIOS_UART_TRDY) == 0) | |
028ab6b5 | 112 | WATCHDOG_RESET (); |
4a551709 WD |
113 | uart->txdata = (unsigned char)c; |
114 | } | |
115 | ||
e4cc71aa | 116 | void serial_puts (const char *s) |
4a551709 | 117 | { |
e4cc71aa WD |
118 | while (*s != 0) { |
119 | serial_putc (*s++); | |
4a551709 WD |
120 | } |
121 | } | |
122 | ||
e4cc71aa | 123 | int serial_tstc (void) |
4a551709 | 124 | { |
e4cc71aa | 125 | return (uart->status & NIOS_UART_RRDY); |
4a551709 WD |
126 | } |
127 | ||
e4cc71aa | 128 | int serial_getc (void) |
4a551709 | 129 | { |
e4cc71aa | 130 | while (serial_tstc () == 0) |
028ab6b5 | 131 | WATCHDOG_RESET (); |
4a551709 WD |
132 | return( uart->rxdata & 0x00ff ); |
133 | } | |
e4cc71aa WD |
134 | |
135 | #endif /* CONFIG_JTAG_CONSOLE */ |