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
|
/*
* (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>
*
* (C) Copyright 2002
* Gary Jennejohn, DENX Software Engineering, <gj@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 <init.h>
#include <clock.h>
#include <asm/arch/imx-regs.h>
#include <asm/arch/clock.h>
#define GPT(x) __REG(IMX_TIM1_BASE + (x))
uint64_t imx_clocksource_read(void)
{
return GPT(GPT_TCN);
}
static struct clocksource cs = {
.read = imx_clocksource_read,
.mask = 0xffffffff,
.shift = 10,
};
static int clocksource_init (void)
{
int i;
/* setup GP Timer 1 */
GPT(GPT_TCTL) = TCTL_SWR;
for (i = 0; i < 100; i++)
GPT(GPT_TCTL) = 0; /* We have no udelay by now */
GPT(GPT_TPRER) = 0;
GPT(GPT_TCTL) |= TCTL_FRR | (1<<1); /* Freerun Mode, PERCLK1 input */
GPT(GPT_TCTL) &= ~TCTL_TEN;
GPT(GPT_TCTL) |= TCTL_TEN; /* Enable timer */
cs.mult = clocksource_hz2mult(get_PERCLK1(), cs.shift);
init_clock(&cs);
return 0;
}
core_initcall(clocksource_init);
/*
* Reset the cpu by setting up the watchdog timer and let him time out
*/
void reset_cpu (ulong ignored)
{
/* Disable watchdog and set Time-Out field to 0 */
WCR = 0x00000000;
/* Write Service Sequence */
WSR = 0x00005555;
WSR = 0x0000AAAA;
/* Enable watchdog */
WCR = 0x00000001;
while (1);
/*NOTREACHED*/
}
EXPORT_SYMBOL(reset_cpu);
|
