]>
Commit | Line | Data |
---|---|---|
c9d4f46b SM |
1 | /* |
2 | * (C) Copyright 2004, 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 | #include <common.h> | |
25 | #include <watchdog.h> | |
26 | #include <asm/io.h> | |
27 | #include <nios2-io.h> | |
28 | ||
29 | DECLARE_GLOBAL_DATA_PTR; | |
30 | ||
31 | /*------------------------------------------------------------------ | |
32 | * JTAG acts as the serial port | |
33 | *-----------------------------------------------------------------*/ | |
34 | static nios_jtag_t *jtag = (nios_jtag_t *)CONFIG_SYS_NIOS_CONSOLE; | |
35 | ||
36 | void serial_setbrg( void ){ return; } | |
37 | int serial_init( void ) { return(0);} | |
38 | ||
39 | void serial_putc (char c) | |
40 | { | |
99485296 TC |
41 | while (1) { |
42 | unsigned st = readl(&jtag->control); | |
43 | if (NIOS_JTAG_WSPACE(st)) | |
44 | break; | |
45 | #ifdef CONFIG_ALTERA_JTAG_UART_BYPASS | |
46 | if (!(st & NIOS_JTAG_AC)) /* no connection */ | |
47 | return; | |
48 | #endif | |
49 | WATCHDOG_RESET(); | |
50 | } | |
3ea0037f | 51 | writel ((unsigned char)c, &jtag->data); |
c9d4f46b SM |
52 | } |
53 | ||
54 | void serial_puts (const char *s) | |
55 | { | |
56 | while (*s != 0) | |
57 | serial_putc (*s++); | |
58 | } | |
59 | ||
60 | int serial_tstc (void) | |
61 | { | |
62 | return ( readl (&jtag->control) & NIOS_JTAG_RRDY); | |
63 | } | |
64 | ||
65 | int serial_getc (void) | |
66 | { | |
67 | int c; | |
68 | unsigned val; | |
69 | ||
70 | while (1) { | |
71 | WATCHDOG_RESET (); | |
72 | val = readl (&jtag->data); | |
73 | if (val & NIOS_JTAG_RVALID) | |
74 | break; | |
75 | } | |
76 | c = val & 0x0ff; | |
77 | return (c); | |
78 | } |