diff options
Diffstat (limited to 'arch/arm/mach-iop3xx/iop321-time.c')
-rw-r--r-- | arch/arm/mach-iop3xx/iop321-time.c | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/arch/arm/mach-iop3xx/iop321-time.c b/arch/arm/mach-iop3xx/iop321-time.c deleted file mode 100644 index 04b1a6f7ebae..000000000000 --- a/arch/arm/mach-iop3xx/iop321-time.c +++ /dev/null | |||
@@ -1,108 +0,0 @@ | |||
1 | /* | ||
2 | * arch/arm/mach-iop3xx/iop321-time.c | ||
3 | * | ||
4 | * Timer code for IOP321 based systems | ||
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 | |||
22 | #include <asm/hardware.h> | ||
23 | #include <asm/io.h> | ||
24 | #include <asm/irq.h> | ||
25 | #include <asm/uaccess.h> | ||
26 | #include <asm/mach/irq.h> | ||
27 | #include <asm/mach/time.h> | ||
28 | |||
29 | #define IOP321_TIME_SYNC 0 | ||
30 | |||
31 | static inline unsigned long get_elapsed(void) | ||
32 | { | ||
33 | return LATCH - *IOP321_TU_TCR0; | ||
34 | } | ||
35 | |||
36 | static unsigned long iop321_gettimeoffset(void) | ||
37 | { | ||
38 | unsigned long elapsed, usec; | ||
39 | u32 tisr1, tisr2; | ||
40 | |||
41 | /* | ||
42 | * If an interrupt was pending before we read the timer, | ||
43 | * we've already wrapped. Factor this into the time. | ||
44 | * If an interrupt was pending after we read the timer, | ||
45 | * it may have wrapped between checking the interrupt | ||
46 | * status and reading the timer. Re-read the timer to | ||
47 | * be sure its value is after the wrap. | ||
48 | */ | ||
49 | |||
50 | asm volatile("mrc p6, 0, %0, c6, c1, 0" : "=r" (tisr1)); | ||
51 | elapsed = get_elapsed(); | ||
52 | asm volatile("mrc p6, 0, %0, c6, c1, 0" : "=r" (tisr2)); | ||
53 | |||
54 | if(tisr1 & 1) | ||
55 | elapsed += LATCH; | ||
56 | else if (tisr2 & 1) | ||
57 | elapsed = LATCH + get_elapsed(); | ||
58 | |||
59 | /* | ||
60 | * Now convert them to usec. | ||
61 | */ | ||
62 | usec = (unsigned long)(elapsed / (CLOCK_TICK_RATE/1000000)); | ||
63 | |||
64 | return usec; | ||
65 | } | ||
66 | |||
67 | static irqreturn_t | ||
68 | iop321_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) | ||
69 | { | ||
70 | u32 tisr; | ||
71 | |||
72 | write_seqlock(&xtime_lock); | ||
73 | |||
74 | asm volatile("mrc p6, 0, %0, c6, c1, 0" : "=r" (tisr)); | ||
75 | tisr |= 1; | ||
76 | asm volatile("mcr p6, 0, %0, c6, c1, 0" : : "r" (tisr)); | ||
77 | |||
78 | timer_tick(regs); | ||
79 | |||
80 | write_sequnlock(&xtime_lock); | ||
81 | |||
82 | return IRQ_HANDLED; | ||
83 | } | ||
84 | |||
85 | static struct irqaction iop321_timer_irq = { | ||
86 | .name = "IOP321 Timer Tick", | ||
87 | .handler = iop321_timer_interrupt, | ||
88 | .flags = IRQF_DISABLED | IRQF_TIMER, | ||
89 | }; | ||
90 | |||
91 | static void __init iop321_timer_init(void) | ||
92 | { | ||
93 | u32 timer_ctl; | ||
94 | |||
95 | setup_irq(IRQ_IOP321_TIMER0, &iop321_timer_irq); | ||
96 | |||
97 | timer_ctl = IOP321_TMR_EN | IOP321_TMR_PRIVILEGED | IOP321_TMR_RELOAD | | ||
98 | IOP321_TMR_RATIO_1_1; | ||
99 | |||
100 | asm volatile("mcr p6, 0, %0, c4, c1, 0" : : "r" (LATCH)); | ||
101 | |||
102 | asm volatile("mcr p6, 0, %0, c0, c1, 0" : : "r" (timer_ctl)); | ||
103 | } | ||
104 | |||
105 | struct sys_timer iop321_timer = { | ||
106 | .init = &iop321_timer_init, | ||
107 | .offset = iop321_gettimeoffset, | ||
108 | }; | ||