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
|
// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2022 Advanced Micro Devices, Inc
* Michal Simek <michal.simek@amd.com>
*
* (C) Copyright 2007 Michal Simek
* Michal SIMEK <monstr@monstr.eu>
*/
#include <common.h>
#include <dm.h>
#include <timer.h>
#include <regmap.h>
#include <dm/device_compat.h>
#define TIMER_ENABLE_ALL 0x400 /* ENALL */
#define TIMER_PWM 0x200 /* PWMA0 */
#define TIMER_INTERRUPT 0x100 /* T0INT */
#define TIMER_ENABLE 0x080 /* ENT0 */
#define TIMER_ENABLE_INTR 0x040 /* ENIT0 */
#define TIMER_RESET 0x020 /* LOAD0 */
#define TIMER_RELOAD 0x010 /* ARHT0 */
#define TIMER_EXT_CAPTURE 0x008 /* CAPT0 */
#define TIMER_EXT_COMPARE 0x004 /* GENT0 */
#define TIMER_DOWN_COUNT 0x002 /* UDT0 */
#define TIMER_CAPTURE_MODE 0x001 /* MDT0 */
#define TIMER_CONTROL_OFFSET 0
#define TIMER_LOADREG_OFFSET 4
#define TIMER_COUNTER_OFFSET 8
struct xilinx_timer_priv {
struct regmap *regs;
};
static u64 xilinx_timer_get_count(struct udevice *dev)
{
struct xilinx_timer_priv *priv = dev_get_priv(dev);
u32 value;
regmap_read(priv->regs, TIMER_COUNTER_OFFSET, &value);
return timer_conv_64(value);
}
static int xilinx_timer_probe(struct udevice *dev)
{
struct xilinx_timer_priv *priv = dev_get_priv(dev);
int ret;
/* uc_priv->clock_rate has already clock rate */
ret = regmap_init_mem(dev_ofnode(dev), &priv->regs);
if (ret) {
dev_dbg(dev, "failed to get regbase of timer\n");
return ret;
}
regmap_write(priv->regs, TIMER_LOADREG_OFFSET, 0);
regmap_write(priv->regs, TIMER_CONTROL_OFFSET, TIMER_RESET);
regmap_write(priv->regs, TIMER_CONTROL_OFFSET,
TIMER_ENABLE | TIMER_RELOAD);
return 0;
}
static const struct timer_ops xilinx_timer_ops = {
.get_count = xilinx_timer_get_count,
};
static const struct udevice_id xilinx_timer_ids[] = {
{ .compatible = "xlnx,xps-timer-1.00.a" },
{}
};
U_BOOT_DRIVER(xilinx_timer) = {
.name = "xilinx_timer",
.id = UCLASS_TIMER,
.of_match = xilinx_timer_ids,
.priv_auto = sizeof(struct xilinx_timer_priv),
.probe = xilinx_timer_probe,
.ops = &xilinx_timer_ops,
};
|
