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
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 <command.h>
#include <asm/mcfuart.h>
#ifdef CONFIG_M5272
#include <asm/m5272.h>
#endif
#ifdef CONFIG_M5282
#include <asm/m5282.h>
#endif
#ifdef CONFIG_M5249
#include <asm/m5249.h>
#endif
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_M5249
#define DoubleClock(a) ((double)(CFG_CLK/2) / 32.0 / (double)(a))
#else
#define DoubleClock(a) ((double)(CFG_CLK) / 32.0 / (double)(a))
#endif
void rs_serial_setbaudrate(int port,int baudrate)
{
#if defined(CONFIG_M5272) || defined(CONFIG_M5249)
volatile unsigned char *uartp;
double clock, fraction;
if (port == 0)
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
else
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2);
clock = DoubleClock(baudrate); /* Set baud above */
fraction = ((clock - (int)clock) * 16.0) + 0.5;
uartp[MCFUART_UBG1] = (((int)clock >> 8) & 0xff); /* set msb baud */
uartp[MCFUART_UBG2] = ((int)clock & 0xff); /* set lsb baud */
uartp[MCFUART_UFPD] = ((int)fraction & 0xf); /* set baud fraction adjust */
#endif
};
void rs_serial_init(int port,int baudrate)
{
volatile unsigned char *uartp;
/*
* Reset UART, get it into known state...
*/
if (port == 0)
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
else
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE2);
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETRX; /* reset RX */
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETTX; /* reset TX */
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETMRPTR; /* reset MR pointer */
uartp[MCFUART_UCR] = MCFUART_UCR_CMDRESETERR; /* reset Error pointer */
/*
* Set port for CONSOLE_BAUD_RATE, 8 data bits, 1 stop bit, no parity.
*/
uartp[MCFUART_UMR] = MCFUART_MR1_PARITYNONE | MCFUART_MR1_CS8;
uartp[MCFUART_UMR] = MCFUART_MR2_STOP1;
rs_serial_setbaudrate(port,baudrate);
uartp[MCFUART_UCSR] = MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER;
uartp[MCFUART_UCR] = MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE;
return;
}
/****************************************************************************/
/*
* Output a single character, using UART polled mode.
* This is used for console output.
*/
void rs_put_char(char ch)
{
volatile unsigned char *uartp;
int i;
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
for (i = 0; (i < 0x10000); i++) {
if (uartp[MCFUART_USR] & MCFUART_USR_TXREADY)
break;
}
uartp[MCFUART_UTB] = ch;
return;
}
int rs_is_char(void)
{
volatile unsigned char *uartp;
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
return((uartp[MCFUART_USR] & MCFUART_USR_RXREADY) ? 1 : 0);
}
int rs_get_char(void)
{
volatile unsigned char *uartp;
uartp = (volatile unsigned char *) (CFG_MBAR + MCFUART_BASE1);
return(uartp[MCFUART_URB]);
}
void serial_setbrg(void) {
rs_serial_setbaudrate(0,gd->bd->bi_baudrate);
}
int serial_init(void) {
rs_serial_init(0,gd->baudrate);
return 0;
}
void serial_putc(const char c) {
if (c == '\n')
serial_putc ('\r');
rs_put_char(c);
}
void serial_puts (const char *s) {
while (*s) {
serial_putc(*s++);
}
}
int serial_getc(void) {
while(!rs_is_char());
return rs_get_char();
}
int serial_tstc() {
return rs_is_char();
}
|
