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Commit | Line | Data |
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edc48b66 | 1 | /* |
39539887 | 2 | * (C) Copyright 2002-2004 |
edc48b66 WD |
3 | * Wolfgang Denk, DENX Software Engineering, <wd@denx.de> |
4 | * | |
5 | * (C) Copyright 2002 | |
6 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> | |
7 | * Marius Groeger <mgroeger@sysgo.de> | |
8 | * | |
9 | * (C) Copyright 2002 | |
10 | * Sysgo Real-Time Solutions, GmbH <www.elinos.com> | |
11 | * Alex Zuepke <azu@sysgo.de> | |
12 | * | |
13 | * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify | |
16 | * it under the terms of the GNU General Public License as published by | |
17 | * the Free Software Foundation; either version 2 of the License, or | |
18 | * (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
28 | * | |
29 | */ | |
30 | ||
31 | #include <common.h> | |
39539887 | 32 | #include <clps7111.h> |
2d1a537d | 33 | |
d87080b7 WD |
34 | DECLARE_GLOBAL_DATA_PTR; |
35 | ||
edc48b66 WD |
36 | void serial_setbrg (void) |
37 | { | |
edc48b66 WD |
38 | unsigned int reg = 0; |
39 | ||
39539887 WD |
40 | switch (gd->baudrate) { |
41 | case 1200: reg = 191; break; | |
42 | case 9600: reg = 23; break; | |
43 | case 19200: reg = 11; break; | |
44 | case 38400: reg = 5; break; | |
45 | case 57600: reg = 3; break; | |
46 | case 115200: reg = 1; break; | |
47 | default: hang (); break; | |
48 | } | |
edc48b66 WD |
49 | |
50 | /* init serial serial 1,2 */ | |
51 | IO_SYSCON1 = SYSCON1_UART1EN; | |
52 | IO_SYSCON2 = SYSCON2_UART2EN; | |
53 | ||
54 | reg |= UBRLCR_WRDLEN8; | |
55 | ||
56 | IO_UBRLCR1 = reg; | |
57 | IO_UBRLCR2 = reg; | |
58 | } | |
59 | ||
60 | ||
61 | /* | |
62 | * Initialise the serial port with the given baudrate. The settings | |
63 | * are always 8 data bits, no parity, 1 stop bit, no start bits. | |
64 | * | |
65 | */ | |
66 | int serial_init (void) | |
67 | { | |
68 | serial_setbrg (); | |
69 | ||
70 | return (0); | |
71 | } | |
72 | ||
73 | ||
74 | /* | |
75 | * Output a single byte to the serial port. | |
76 | */ | |
77 | void serial_putc (const char c) | |
78 | { | |
79 | int tmo; | |
80 | ||
81 | /* If \n, also do \r */ | |
82 | if (c == '\n') | |
83 | serial_putc ('\r'); | |
84 | ||
6d0f6bcf | 85 | tmo = get_timer (0) + 1 * CONFIG_SYS_HZ; |
edc48b66 WD |
86 | while (IO_SYSFLG1 & SYSFLG1_UTXFF) |
87 | if (get_timer (0) > tmo) | |
88 | break; | |
89 | ||
90 | IO_UARTDR1 = c; | |
91 | } | |
92 | ||
93 | /* | |
94 | * Read a single byte from the serial port. Returns 1 on success, 0 | |
95 | * otherwise. When the function is succesfull, the character read is | |
96 | * written into its argument c. | |
97 | */ | |
98 | int serial_tstc (void) | |
99 | { | |
100 | return !(IO_SYSFLG1 & SYSFLG1_URXFE); | |
101 | } | |
102 | ||
103 | /* | |
104 | * Read a single byte from the serial port. Returns 1 on success, 0 | |
105 | * otherwise. When the function is succesfull, the character read is | |
106 | * written into its argument c. | |
107 | */ | |
108 | int serial_getc (void) | |
109 | { | |
110 | while (IO_SYSFLG1 & SYSFLG1_URXFE); | |
111 | ||
112 | return IO_UARTDR1 & 0xff; | |
113 | } | |
114 | ||
115 | void | |
116 | serial_puts (const char *s) | |
117 | { | |
118 | while (*s) { | |
119 | serial_putc (*s++); | |
120 | } | |
121 | } |