1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24#include "priv.h"
25#include "regsnv04.h"
26
27void
28nv04_timer_time(struct nvkm_timer *tmr, u64 time)
29{
30 struct nvkm_subdev *subdev = &tmr->subdev;
31 struct nvkm_device *device = subdev->device;
32 u32 hi = upper_32_bits(time);
33 u32 lo = lower_32_bits(time);
34
35 nvkm_debug(subdev, "time low : %08x\n", lo);
36 nvkm_debug(subdev, "time high : %08x\n", hi);
37
38 nvkm_wr32(device, NV04_PTIMER_TIME_1, hi);
39 nvkm_wr32(device, NV04_PTIMER_TIME_0, lo);
40}
41
42u64
43nv04_timer_read(struct nvkm_timer *tmr)
44{
45 struct nvkm_device *device = tmr->subdev.device;
46 u32 hi, lo;
47
48 do {
49 hi = nvkm_rd32(device, NV04_PTIMER_TIME_1);
50 lo = nvkm_rd32(device, NV04_PTIMER_TIME_0);
51 } while (hi != nvkm_rd32(device, NV04_PTIMER_TIME_1));
52
53 return ((u64)hi << 32 | lo);
54}
55
56void
57nv04_timer_alarm_fini(struct nvkm_timer *tmr)
58{
59 struct nvkm_device *device = tmr->subdev.device;
60 nvkm_wr32(device, NV04_PTIMER_INTR_EN_0, 0x00000000);
61}
62
63void
64nv04_timer_alarm_init(struct nvkm_timer *tmr, u32 time)
65{
66 struct nvkm_device *device = tmr->subdev.device;
67 nvkm_wr32(device, NV04_PTIMER_ALARM_0, time);
68 nvkm_wr32(device, NV04_PTIMER_INTR_EN_0, 0x00000001);
69}
70
71void
72nv04_timer_intr(struct nvkm_timer *tmr)
73{
74 struct nvkm_subdev *subdev = &tmr->subdev;
75 struct nvkm_device *device = subdev->device;
76 u32 stat = nvkm_rd32(device, NV04_PTIMER_INTR_0);
77
78 if (stat & 0x00000001) {
79 nvkm_wr32(device, NV04_PTIMER_INTR_0, 0x00000001);
80 nvkm_timer_alarm_trigger(tmr);
81 stat &= ~0x00000001;
82 }
83
84 if (stat) {
85 nvkm_error(subdev, "intr %08x\n", stat);
86 nvkm_wr32(device, NV04_PTIMER_INTR_0, stat);
87 }
88}
89
90static void
91nv04_timer_init(struct nvkm_timer *tmr)
92{
93 struct nvkm_subdev *subdev = &tmr->subdev;
94 struct nvkm_device *device = subdev->device;
95 u32 f = 0;
96 u32 n, d;
97
98
99 d = 1000000 / 32;
100 n = f;
101
102 if (!f) {
103 n = nvkm_rd32(device, NV04_PTIMER_NUMERATOR);
104 d = nvkm_rd32(device, NV04_PTIMER_DENOMINATOR);
105 if (!n || !d) {
106 n = 1;
107 d = 1;
108 }
109 nvkm_warn(subdev, "unknown input clock freq\n");
110 }
111
112
113 while (((n % 5) == 0) && ((d % 5) == 0)) {
114 n /= 5;
115 d /= 5;
116 }
117
118 while (((n % 2) == 0) && ((d % 2) == 0)) {
119 n /= 2;
120 d /= 2;
121 }
122
123 while (n > 0xffff || d > 0xffff) {
124 n >>= 1;
125 d >>= 1;
126 }
127
128 nvkm_debug(subdev, "input frequency : %dHz\n", f);
129 nvkm_debug(subdev, "numerator : %08x\n", n);
130 nvkm_debug(subdev, "denominator : %08x\n", d);
131 nvkm_debug(subdev, "timer frequency : %dHz\n", f * d / n);
132
133 nvkm_wr32(device, NV04_PTIMER_NUMERATOR, n);
134 nvkm_wr32(device, NV04_PTIMER_DENOMINATOR, d);
135}
136
137static const struct nvkm_timer_func
138nv04_timer = {
139 .init = nv04_timer_init,
140 .intr = nv04_timer_intr,
141 .read = nv04_timer_read,
142 .time = nv04_timer_time,
143 .alarm_init = nv04_timer_alarm_init,
144 .alarm_fini = nv04_timer_alarm_fini,
145};
146
147int
148nv04_timer_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
149 struct nvkm_timer **ptmr)
150{
151 return nvkm_timer_new_(&nv04_timer, device, type, inst, ptmr);
152}
153