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-rw-r--r--arch/arm/mach-iop13xx/time.c92
1 files changed, 0 insertions, 92 deletions
diff --git a/arch/arm/mach-iop13xx/time.c b/arch/arm/mach-iop13xx/time.c
deleted file mode 100644
index fc9d9d9a842..00000000000
--- a/arch/arm/mach-iop13xx/time.c
+++ /dev/null
@@ -1,92 +0,0 @@
1/*
2 * arch/arm/mach-iop13xx/time.c
3 *
4 * Timer code for IOP13xx (copied from IOP32x/IOP33x implementation)
5 *
6 * Author: Deepak Saxena <dsaxena@mvista.com>
7 *
8 * Copyright 2002-2003 MontaVista Software Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
14 */
15
16#include <linux/kernel.h>
17#include <linux/interrupt.h>
18#include <linux/time.h>
19#include <linux/init.h>
20#include <linux/timex.h>
21#include <asm/io.h>
22#include <asm/irq.h>
23#include <asm/uaccess.h>
24#include <asm/mach/irq.h>
25#include <asm/mach/time.h>
26
27static unsigned long ticks_per_jiffy;
28static unsigned long ticks_per_usec;
29static unsigned long next_jiffy_time;
30
31static inline u32 read_tcr1(void)
32{
33 u32 val;
34 asm volatile("mrc p6, 0, %0, c3, c9, 0" : "=r" (val));
35 return val;
36}
37
38unsigned long iop13xx_gettimeoffset(void)
39{
40 unsigned long offset;
41
42 offset = next_jiffy_time - read_tcr1();
43
44 return offset / ticks_per_usec;
45}
46
47static irqreturn_t
48iop13xx_timer_interrupt(int irq, void *dev_id)
49{
50 write_seqlock(&xtime_lock);
51
52 asm volatile("mcr p6, 0, %0, c6, c9, 0" : : "r" (1));
53
54 while ((signed long)(next_jiffy_time - read_tcr1())
55 >= ticks_per_jiffy) {
56 timer_tick();
57 next_jiffy_time -= ticks_per_jiffy;
58 }
59
60 write_sequnlock(&xtime_lock);
61
62 return IRQ_HANDLED;
63}
64
65static struct irqaction iop13xx_timer_irq = {
66 .name = "IOP13XX Timer Tick",
67 .handler = iop13xx_timer_interrupt,
68 .flags = IRQF_DISABLED | IRQF_TIMER,
69};
70
71void __init iop13xx_init_time(unsigned long tick_rate)
72{
73 u32 timer_ctl;
74
75 ticks_per_jiffy = (tick_rate + HZ/2) / HZ;
76 ticks_per_usec = tick_rate / 1000000;
77 next_jiffy_time = 0xffffffff;
78
79 timer_ctl = IOP13XX_TMR_EN | IOP13XX_TMR_PRIVILEGED |
80 IOP13XX_TMR_RELOAD | IOP13XX_TMR_RATIO_1_1;
81
82 /*
83 * We use timer 0 for our timer interrupt, and timer 1 as
84 * monotonic counter for tracking missed jiffies.
85 */
86 asm volatile("mcr p6, 0, %0, c4, c9, 0" : : "r" (ticks_per_jiffy - 1));
87 asm volatile("mcr p6, 0, %0, c0, c9, 0" : : "r" (timer_ctl));
88 asm volatile("mcr p6, 0, %0, c5, c9, 0" : : "r" (0xffffffff));
89 asm volatile("mcr p6, 0, %0, c1, c9, 0" : : "r" (timer_ctl));
90
91 setup_irq(IRQ_IOP13XX_TIMER0, &iop13xx_timer_irq);
92}