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
|
/*
* Copyright (c) 2008, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google, Inc. nor the names of its contributors
* may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <debug.h>
#include <reg.h>
#include <sys/types.h>
#include <platform/timer.h>
#include <platform/irqs.h>
#include <platform/iomap.h>
#include <platform/interrupts.h>
#include <kernel/thread.h>
#ifdef PLATFORM_MSM7X30
#define MSM_GPT_BASE (MSM_TMR_BASE + 0x4)
#define MSM_DGT_BASE (MSM_TMR_BASE + 0x24)
#define GPT_REG(off) (MSM_GPT_BASE + (off))
#define DGT_REG(off) (MSM_DGT_BASE + (off))
#define SPSS_TIMER_STATUS (MSM_TMR_BASE + 0x88)
#define GPT_MATCH_VAL GPT_REG(0x0000)
#define GPT_COUNT_VAL GPT_REG(0x0004)
#define GPT_ENABLE GPT_REG(0x0008)
#define GPT_ENABLE_CLR_ON_MATCH_EN 2
#define GPT_ENABLE_EN 1
#define GPT_CLEAR GPT_REG(0x000C)
#define DGT_MATCH_VAL DGT_REG(0x0000)
#define DGT_COUNT_VAL DGT_REG(0x0004)
#define DGT_ENABLE DGT_REG(0x0008)
#define DGT_ENABLE_CLR_ON_MATCH_EN 2
#define DGT_ENABLE_EN 1
#define DGT_CLEAR DGT_REG(0x000C)
#else
#define GPT_REG(off) (MSM_GPT_BASE + (off))
#define GPT_MATCH_VAL GPT_REG(0x0000)
#define GPT_COUNT_VAL GPT_REG(0x0004)
#define GPT_ENABLE GPT_REG(0x0008)
#define GPT_ENABLE_CLR_ON_MATCH_EN 2
#define GPT_ENABLE_EN 1
#define GPT_CLEAR GPT_REG(0x000C)
#define DGT_MATCH_VAL GPT_REG(0x0010)
#define DGT_COUNT_VAL GPT_REG(0x0014)
#define DGT_ENABLE GPT_REG(0x0018)
#define DGT_ENABLE_CLR_ON_MATCH_EN 2
#define DGT_ENABLE_EN 1
#define DGT_CLEAR GPT_REG(0x001C)
#define SPSS_TIMER_STATUS GPT_REG(0x0034)
#endif
static platform_timer_callback timer_callback;
static void *timer_arg;
static time_t timer_interval;
static volatile uint32_t ticks;
static enum handler_return timer_irq(void *arg)
{
ticks += timer_interval;
return timer_callback(timer_arg, ticks);
}
status_t platform_set_periodic_timer(
platform_timer_callback callback,
void *arg, time_t interval)
{
enter_critical_section();
timer_callback = callback;
timer_arg = arg;
timer_interval = interval;
writel(timer_interval * 19200, DGT_MATCH_VAL);
writel(0, DGT_CLEAR);
writel(DGT_ENABLE_EN | DGT_ENABLE_CLR_ON_MATCH_EN, DGT_ENABLE);
register_int_handler(INT_DEBUG_TIMER_EXP, timer_irq, 0);
unmask_interrupt(INT_DEBUG_TIMER_EXP);
exit_critical_section();
return 0;
}
time_t current_time(void)
{
return ticks;
}
void platform_init_timer(void)
{
writel(0, DGT_ENABLE);
}
static void wait_for_timer_op(void)
{
#if PLATFORM_QSD8K || PLATFORM_MSM7X30
while(readl(SPSS_TIMER_STATUS)) ;
#endif
}
void platform_uninit_timer(void)
{
writel(0, DGT_ENABLE);
wait_for_timer_op();
writel(0, DGT_CLEAR);
wait_for_timer_op();
}
void mdelay(unsigned msecs)
{
msecs *= 33;
writel(0, GPT_CLEAR);
writel(0, GPT_ENABLE);
while(readl(GPT_COUNT_VAL) != 0) ;
writel(GPT_ENABLE_EN, GPT_ENABLE);
while(readl(GPT_COUNT_VAL) < msecs) ;
writel(0, GPT_ENABLE);
writel(0, GPT_CLEAR);
}
|
