blob: 3e8032960842e7c935daa34d189b9b441b9fe99a (
plain)
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
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* Copyright (C) Marvell International Ltd. and its affiliates
* Written-by: Prafulla Wadaskar <prafulla@marvell.com>
*
* 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., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include <common.h>
#include <asm/arch/kirkwood.h>
#define UBOOT_CNTR 0 /* counter to use for uboot timer */
/* Timer reload and current value registers */
struct kwtmr_val {
u32 reload; /* Timer reload reg */
u32 val; /* Timer value reg */
};
/* Timer registers */
struct kwtmr_registers {
u32 ctrl; /* Timer control reg */
u32 pad[3];
struct kwtmr_val tmr[2];
u32 wdt_reload;
u32 wdt_val;
};
struct kwtmr_registers *kwtmr_regs = (struct kwtmr_registers *)KW_TIMER_BASE;
/*
* ARM Timers Registers Map
*/
#define CNTMR_CTRL_REG &kwtmr_regs->ctrl
#define CNTMR_RELOAD_REG(tmrnum) &kwtmr_regs->tmr[tmrnum].reload
#define CNTMR_VAL_REG(tmrnum) &kwtmr_regs->tmr[tmrnum].val
/*
* ARM Timers Control Register
* CPU_TIMERS_CTRL_REG (CTCR)
*/
#define CTCR_ARM_TIMER_EN_OFFS(cntr) (cntr * 2)
#define CTCR_ARM_TIMER_EN_MASK(cntr) (1 << CTCR_ARM_TIMER_EN_OFFS)
#define CTCR_ARM_TIMER_EN(cntr) (1 << CTCR_ARM_TIMER_EN_OFFS(cntr))
#define CTCR_ARM_TIMER_DIS(cntr) (0 << CTCR_ARM_TIMER_EN_OFFS(cntr))
#define CTCR_ARM_TIMER_AUTO_OFFS(cntr) ((cntr * 2) + 1)
#define CTCR_ARM_TIMER_AUTO_MASK(cntr) (1 << 1)
#define CTCR_ARM_TIMER_AUTO_EN(cntr) (1 << CTCR_ARM_TIMER_AUTO_OFFS(cntr))
#define CTCR_ARM_TIMER_AUTO_DIS(cntr) (0 << CTCR_ARM_TIMER_AUTO_OFFS(cntr))
/*
* ARM Timer\Watchdog Reload Register
* CNTMR_RELOAD_REG (TRR)
*/
#define TRG_ARM_TIMER_REL_OFFS 0
#define TRG_ARM_TIMER_REL_MASK 0xffffffff
/*
* ARM Timer\Watchdog Register
* CNTMR_VAL_REG (TVRG)
*/
#define TVR_ARM_TIMER_OFFS 0
#define TVR_ARM_TIMER_MASK 0xffffffff
#define TVR_ARM_TIMER_MAX 0xffffffff
#define TIMER_LOAD_VAL 0xffffffff
#define READ_TIMER (readl(CNTMR_VAL_REG(UBOOT_CNTR)) / \
(CONFIG_SYS_TCLK / 1000))
DECLARE_GLOBAL_DATA_PTR;
#define timestamp gd->tbl
#define lastdec gd->lastinc
void reset_timer_masked(void)
{
/* reset time */
lastdec = READ_TIMER;
timestamp = 0;
}
ulong get_timer_masked(void)
{
ulong now = READ_TIMER;
if (lastdec >= now) {
/* normal mode */
timestamp += lastdec - now;
} else {
/* we have an overflow ... */
timestamp += lastdec +
(TIMER_LOAD_VAL / (CONFIG_SYS_TCLK / 1000)) - now;
}
lastdec = now;
return timestamp;
}
void reset_timer(void)
{
reset_timer_masked();
}
ulong get_timer(ulong base)
{
return get_timer_masked() - base;
}
void set_timer(ulong t)
{
timestamp = t;
}
void __udelay(unsigned long usec)
{
uint current;
ulong delayticks;
current = readl(CNTMR_VAL_REG(UBOOT_CNTR));
delayticks = (usec * (CONFIG_SYS_TCLK / 1000000));
if (current < delayticks) {
delayticks -= current;
while (readl(CNTMR_VAL_REG(UBOOT_CNTR)) < current) ;
while ((TIMER_LOAD_VAL - delayticks) <
readl(CNTMR_VAL_REG(UBOOT_CNTR))) ;
} else {
while (readl(CNTMR_VAL_REG(UBOOT_CNTR)) >
(current - delayticks)) ;
}
}
/*
* init the counter
*/
int timer_init(void)
{
unsigned int cntmrctrl;
/* load value into timer */
writel(TIMER_LOAD_VAL, CNTMR_RELOAD_REG(UBOOT_CNTR));
writel(TIMER_LOAD_VAL, CNTMR_VAL_REG(UBOOT_CNTR));
/* enable timer in auto reload mode */
cntmrctrl = readl(CNTMR_CTRL_REG);
cntmrctrl |= CTCR_ARM_TIMER_EN(UBOOT_CNTR);
cntmrctrl |= CTCR_ARM_TIMER_AUTO_EN(UBOOT_CNTR);
writel(cntmrctrl, CNTMR_CTRL_REG);
/* init the timestamp and lastdec value */
reset_timer_masked();
return 0;
}
|
