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
|
/*
* Copyright 2012 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include "priv.h"
#include "regsnv04.h"
void
nv04_timer_time(struct nvkm_timer *tmr, u64 time)
{
struct nvkm_subdev *subdev = &tmr->subdev;
struct nvkm_device *device = subdev->device;
u32 hi = upper_32_bits(time);
u32 lo = lower_32_bits(time);
nvkm_debug(subdev, "time low : %08x\n", lo);
nvkm_debug(subdev, "time high : %08x\n", hi);
nvkm_wr32(device, NV04_PTIMER_TIME_1, hi);
nvkm_wr32(device, NV04_PTIMER_TIME_0, lo);
}
u64
nv04_timer_read(struct nvkm_timer *tmr)
{
struct nvkm_device *device = tmr->subdev.device;
u32 hi, lo;
do {
hi = nvkm_rd32(device, NV04_PTIMER_TIME_1);
lo = nvkm_rd32(device, NV04_PTIMER_TIME_0);
} while (hi != nvkm_rd32(device, NV04_PTIMER_TIME_1));
return ((u64)hi << 32 | lo);
}
void
nv04_timer_alarm_fini(struct nvkm_timer *tmr)
{
struct nvkm_device *device = tmr->subdev.device;
nvkm_wr32(device, NV04_PTIMER_INTR_EN_0, 0x00000000);
}
void
nv04_timer_alarm_init(struct nvkm_timer *tmr, u32 time)
{
struct nvkm_device *device = tmr->subdev.device;
nvkm_wr32(device, NV04_PTIMER_ALARM_0, time);
nvkm_wr32(device, NV04_PTIMER_INTR_EN_0, 0x00000001);
}
void
nv04_timer_intr(struct nvkm_timer *tmr)
{
struct nvkm_subdev *subdev = &tmr->subdev;
struct nvkm_device *device = subdev->device;
u32 stat = nvkm_rd32(device, NV04_PTIMER_INTR_0);
if (stat & 0x00000001) {
nvkm_wr32(device, NV04_PTIMER_INTR_0, 0x00000001);
nvkm_timer_alarm_trigger(tmr);
stat &= ~0x00000001;
}
if (stat) {
nvkm_error(subdev, "intr %08x\n", stat);
nvkm_wr32(device, NV04_PTIMER_INTR_0, stat);
}
}
static void
nv04_timer_init(struct nvkm_timer *tmr)
{
struct nvkm_subdev *subdev = &tmr->subdev;
struct nvkm_device *device = subdev->device;
u32 f = 0; /*XXX: nvclk */
u32 n, d;
/* aim for 31.25MHz, which gives us nanosecond timestamps */
d = 1000000 / 32;
n = f;
if (!f) {
n = nvkm_rd32(device, NV04_PTIMER_NUMERATOR);
d = nvkm_rd32(device, NV04_PTIMER_DENOMINATOR);
if (!n || !d) {
n = 1;
d = 1;
}
nvkm_warn(subdev, "unknown input clock freq\n");
}
/* reduce ratio to acceptable values */
while (((n % 5) == 0) && ((d % 5) == 0)) {
n /= 5;
d /= 5;
}
while (((n % 2) == 0) && ((d % 2) == 0)) {
n /= 2;
d /= 2;
}
while (n > 0xffff || d > 0xffff) {
n >>= 1;
d >>= 1;
}
nvkm_debug(subdev, "input frequency : %dHz\n", f);
nvkm_debug(subdev, "numerator : %08x\n", n);
nvkm_debug(subdev, "denominator : %08x\n", d);
nvkm_debug(subdev, "timer frequency : %dHz\n", f * d / n);
nvkm_wr32(device, NV04_PTIMER_NUMERATOR, n);
nvkm_wr32(device, NV04_PTIMER_DENOMINATOR, d);
}
static const struct nvkm_timer_func
nv04_timer = {
.init = nv04_timer_init,
.intr = nv04_timer_intr,
.read = nv04_timer_read,
.time = nv04_timer_time,
.alarm_init = nv04_timer_alarm_init,
.alarm_fini = nv04_timer_alarm_fini,
};
int
nv04_timer_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
struct nvkm_timer **ptmr)
{
return nvkm_timer_new_(&nv04_timer, device, type, inst, ptmr);
}
|
