blob: 4b1084dde8ddfa2dd024412e23af421a5bfe7125 (
plain) (
blame)
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
|
/*
* linux/arch/arm/mach-epxa10db/time.c
*
* Copyright (C) 2000 Deep Blue Solutions
* Copyright (C) 2001 Altera Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <asm/hardware.h>
#include <asm/system.h>
#include <asm/leds.h>
#include <asm/mach/time.h>
#define TIMER00_TYPE (volatile unsigned int*)
#include <asm/arch/timer00.h>
static int epxa10db_set_rtc(void)
{
return 1;
}
static int epxa10db_rtc_init(void)
{
set_rtc = epxa10db_set_rtc;
return 0;
}
__initcall(epxa10db_rtc_init);
/*
* IRQ handler for the timer
*/
static irqreturn_t
epxa10db_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
write_seqlock(&xtime_lock);
// ...clear the interrupt
*TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))|=TIMER0_CR_CI_MSK;
timer_tick(regs);
write_sequnlock(&xtime_lock);
return IRQ_HANDLED;
}
static struct irqaction epxa10db_timer_irq = {
.name = "Excalibur Timer Tick",
.flags = SA_INTERRUPT | SA_TIMER,
.handler = epxa10db_timer_interrupt,
};
/*
* Set up timer interrupt, and return the current time in seconds.
*/
static void __init epxa10db_timer_init(void)
{
/* Start the timer */
*TIMER0_LIMIT(IO_ADDRESS(EXC_TIMER00_BASE))=(unsigned int)(EXC_AHB2_CLK_FREQUENCY/200);
*TIMER0_PRESCALE(IO_ADDRESS(EXC_TIMER00_BASE))=1;
*TIMER0_CR(IO_ADDRESS(EXC_TIMER00_BASE))=TIMER0_CR_IE_MSK | TIMER0_CR_S_MSK;
setup_irq(IRQ_TIMER0, &epxa10db_timer_irq);
}
struct sys_timer epxa10db_timer = {
.init = epxa10db_timer_init,
};
|
