summaryrefslogtreecommitdiff
path: root/drivers/sysreset/sysreset_sandbox.c
blob: 207cc282f1559fd92809b853cc879518bf17eb98 (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
/*
 * Copyright (c) 2015 Google, Inc
 * Written by Simon Glass <sjg@chromium.org>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <dm.h>
#include <errno.h>
#include <sysreset.h>
#include <asm/state.h>
#include <asm/test.h>

static int sandbox_warm_sysreset_request(struct udevice *dev,
					 enum sysreset_t type)
{
	struct sandbox_state *state = state_get_current();

	switch (type) {
	case SYSRESET_WARM:
		state->last_sysreset = type;
		break;
	default:
		return -ENOSYS;
	}
	if (!state->sysreset_allowed[type])
		return -EACCES;

	return -EINPROGRESS;
}

static int sandbox_sysreset_request(struct udevice *dev, enum sysreset_t type)
{
	struct sandbox_state *state = state_get_current();

	/*
	 * If we have a device tree, the device we created from platform data
	 * (see the U_BOOT_DEVICE() declaration below) should not do anything.
	 * If we are that device, return an error.
	 */
	if (state->fdt_fname && !dev_of_valid(dev))
		return -ENODEV;

	switch (type) {
	case SYSRESET_COLD:
		state->last_sysreset = type;
		break;
	case SYSRESET_POWER:
		state->last_sysreset = type;
		if (!state->sysreset_allowed[type])
			return -EACCES;
		sandbox_exit();
		break;
	default:
		return -ENOSYS;
	}
	if (!state->sysreset_allowed[type])
		return -EACCES;

	return -EINPROGRESS;
}

static struct sysreset_ops sandbox_sysreset_ops = {
	.request	= sandbox_sysreset_request,
};

static const struct udevice_id sandbox_sysreset_ids[] = {
	{ .compatible = "sandbox,reset" },
	{ }
};

U_BOOT_DRIVER(sysreset_sandbox) = {
	.name		= "sysreset_sandbox",
	.id		= UCLASS_SYSRESET,
	.of_match	= sandbox_sysreset_ids,
	.ops		= &sandbox_sysreset_ops,
};

static struct sysreset_ops sandbox_warm_sysreset_ops = {
	.request	= sandbox_warm_sysreset_request,
};

static const struct udevice_id sandbox_warm_sysreset_ids[] = {
	{ .compatible = "sandbox,warm-reset" },
	{ }
};

U_BOOT_DRIVER(warm_sysreset_sandbox) = {
	.name		= "warm_sysreset_sandbox",
	.id		= UCLASS_SYSRESET,
	.of_match	= sandbox_warm_sysreset_ids,
	.ops		= &sandbox_warm_sysreset_ops,
};

/* This is here in case we don't have a device tree */
U_BOOT_DEVICE(sysreset_sandbox_non_fdt) = {
	.name = "sysreset_sandbox",
};