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6790c557 JCPV |
1 | /* |
2 | * (C) Copyright 2002-2004 | |
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> | |
32 | #include <asm/arch/hardware.h> | |
33 | ||
34 | DECLARE_GLOBAL_DATA_PTR; | |
35 | ||
36 | void serial_setbrg (void) | |
37 | { | |
38 | unsigned short divisor = 0; | |
39 | ||
40 | switch (gd->baudrate) { | |
41 | case 1200: divisor = 3072; break; | |
42 | case 9600: divisor = 384; break; | |
43 | case 19200: divisor = 192; break; | |
44 | case 38400: divisor = 96; break; | |
45 | case 57600: divisor = 64; break; | |
46 | case 115200: divisor = 32; break; | |
47 | default: hang (); break; | |
48 | } | |
49 | ||
50 | /* init serial UART0 */ | |
51 | PUT8(U0LCR, 0); | |
52 | PUT8(U0IER, 0); | |
53 | PUT8(U0LCR, 0x80); /* DLAB=1 */ | |
54 | PUT8(U0DLL, (unsigned char)(divisor & 0x00FF)); | |
55 | PUT8(U0DLM, (unsigned char)(divisor >> 8)); | |
56 | PUT8(U0LCR, 0x03); /* 8N1, DLAB=0 */ | |
57 | PUT8(U0FCR, 1); /* Enable RX and TX FIFOs */ | |
58 | } | |
59 | ||
60 | int serial_init (void) | |
61 | { | |
62 | unsigned long pinsel0; | |
63 | ||
64 | serial_setbrg (); | |
65 | ||
66 | pinsel0 = GET32(PINSEL0); | |
67 | pinsel0 &= ~(0x00000003); | |
68 | pinsel0 |= 5; | |
69 | PUT32(PINSEL0, pinsel0); | |
70 | ||
71 | return (0); | |
72 | } | |
73 | ||
74 | void serial_putc (const char c) | |
75 | { | |
76 | if (c == '\n') | |
77 | { | |
78 | while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */ | |
79 | PUT8(U0THR, '\r'); | |
80 | } | |
81 | ||
82 | while((GET8(U0LSR) & (1<<5)) == 0); /* Wait for empty U0THR */ | |
83 | PUT8(U0THR, c); | |
84 | } | |
85 | ||
86 | int serial_getc (void) | |
87 | { | |
88 | while((GET8(U0LSR) & 1) == 0); | |
89 | return GET8(U0RBR); | |
90 | } | |
91 | ||
92 | void | |
93 | serial_puts (const char *s) | |
94 | { | |
95 | while (*s) { | |
96 | serial_putc (*s++); | |
97 | } | |
98 | } | |
99 | ||
100 | /* Test if there is a byte to read */ | |
101 | int serial_tstc (void) | |
102 | { | |
103 | return (GET8(U0LSR) & 1); | |
104 | } |