blob: a9693bf44e372dd40eb8967ae084beb33578ed5e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/*
* (C) Copyright 2002
* Lineo, Inc <www.lineo.com>
* Bernhard Kuhn <bkuhn@lineo.com>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Alex Zuepke <azu@sysgo.de>
*
* Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <common.h>
#include <asm/io.h>
#include <asm/arch/hardware.h>
#if !defined(CONFIG_DBGU) && !defined(CONFIG_USART0) && !defined(CONFIG_USART1)
#error must define one of CONFIG_DBGU or CONFIG_USART0 or CONFIG_USART1
#endif
/* ggi thunder */
#ifdef CONFIG_DBGU
AT91PS_USART us = (AT91PS_USART) AT91C_BASE_DBGU;
#endif
#ifdef CONFIG_USART0
AT91PS_USART us = (AT91PS_USART) AT91C_BASE_US0;
#endif
#ifdef CONFIG_USART1
AT91PS_USART us = (AT91PS_USART) AT91C_BASE_US1;
#endif
void serial_setbrg (void)
{
DECLARE_GLOBAL_DATA_PTR;
int baudrate;
if ((baudrate = gd->baudrate) <= 0)
baudrate = CONFIG_BAUDRATE;
if (baudrate == 0 || baudrate == CONFIG_BAUDRATE)
us->US_BRGR = CFG_AT91C_BRGR_DIVISOR; /* hardcode so no __divsi3 */
else
/* MASTER_CLOCK/(16 * baudrate) */
us->US_BRGR = (AT91C_MASTER_CLOCK >> 4)/baudrate;
}
int serial_init (void)
{
/* make any port initializations specific to this port */
#ifdef CONFIG_DBGU
*AT91C_PIOA_PDR = AT91C_PA31_DTXD | AT91C_PA30_DRXD; /* PA 31 & 30 */
*AT91C_PMC_PCER = 1 << AT91C_ID_SYS; /* enable clock */
#endif
#ifdef CONFIG_USART0
*AT91C_PIOA_PDR = AT91C_PA17_TXD0 | AT91C_PA18_RXD0;
*AT91C_PMC_PCER |= 1 << AT91C_ID_USART0; /* enable clock */
#endif
#ifdef CONFIG_USART1
*AT91C_PIOB_PDR = AT91C_PB21_TXD1 | AT91C_PB20_RXD1;
*AT91C_PMC_PCER |= 1 << AT91C_ID_USART1; /* enable clock */
#endif
serial_setbrg ();
us->US_CR = AT91C_US_RSTRX | AT91C_US_RSTTX;
us->US_CR = AT91C_US_RXEN | AT91C_US_TXEN;
us->US_MR =
(AT91C_US_CLKS_CLOCK | AT91C_US_CHRL_8_BITS |
AT91C_US_PAR_NONE | AT91C_US_NBSTOP_1_BIT);
us->US_IMR = ~0ul;
return (0);
}
void serial_putc (const char c)
{
if (c == '\n')
serial_putc ('\r');
while ((us->US_CSR & AT91C_US_TXRDY) == 0);
us->US_THR = c;
}
void serial_puts (const char *s)
{
while (*s) {
serial_putc (*s++);
}
}
int serial_getc (void)
{
while ((us->US_CSR & AT91C_US_RXRDY) == 0);
return us->US_RHR;
}
int serial_tstc (void)
{
return ((us->US_CSR & AT91C_US_RXRDY) == AT91C_US_RXRDY);
}
|
