1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <sysreset.h>
11 #include <asm/state.h>
12 #include <asm/test.h>
13
sandbox_warm_sysreset_request(struct udevice * dev,enum sysreset_t type)14 static int sandbox_warm_sysreset_request(struct udevice *dev,
15 enum sysreset_t type)
16 {
17 struct sandbox_state *state = state_get_current();
18
19 switch (type) {
20 case SYSRESET_WARM:
21 state->last_sysreset = type;
22 break;
23 default:
24 return -ENOSYS;
25 }
26 if (!state->sysreset_allowed[type])
27 return -EACCES;
28
29 return -EINPROGRESS;
30 }
31
sandbox_sysreset_request(struct udevice * dev,enum sysreset_t type)32 static int sandbox_sysreset_request(struct udevice *dev, enum sysreset_t type)
33 {
34 struct sandbox_state *state = state_get_current();
35
36 /*
37 * If we have a device tree, the device we created from platform data
38 * (see the U_BOOT_DEVICE() declaration below) should not do anything.
39 * If we are that device, return an error.
40 */
41 if (state->fdt_fname && !dev_of_valid(dev))
42 return -ENODEV;
43
44 switch (type) {
45 case SYSRESET_COLD:
46 state->last_sysreset = type;
47 break;
48 case SYSRESET_POWER:
49 state->last_sysreset = type;
50 if (!state->sysreset_allowed[type])
51 return -EACCES;
52 sandbox_exit();
53 break;
54 default:
55 return -ENOSYS;
56 }
57 if (!state->sysreset_allowed[type])
58 return -EACCES;
59
60 return -EINPROGRESS;
61 }
62
63 static struct sysreset_ops sandbox_sysreset_ops = {
64 .request = sandbox_sysreset_request,
65 };
66
67 static const struct udevice_id sandbox_sysreset_ids[] = {
68 { .compatible = "sandbox,reset" },
69 { }
70 };
71
72 U_BOOT_DRIVER(sysreset_sandbox) = {
73 .name = "sysreset_sandbox",
74 .id = UCLASS_SYSRESET,
75 .of_match = sandbox_sysreset_ids,
76 .ops = &sandbox_sysreset_ops,
77 };
78
79 static struct sysreset_ops sandbox_warm_sysreset_ops = {
80 .request = sandbox_warm_sysreset_request,
81 };
82
83 static const struct udevice_id sandbox_warm_sysreset_ids[] = {
84 { .compatible = "sandbox,warm-reset" },
85 { }
86 };
87
88 U_BOOT_DRIVER(warm_sysreset_sandbox) = {
89 .name = "warm_sysreset_sandbox",
90 .id = UCLASS_SYSRESET,
91 .of_match = sandbox_warm_sysreset_ids,
92 .ops = &sandbox_warm_sysreset_ops,
93 };
94
95 /* This is here in case we don't have a device tree */
96 U_BOOT_DEVICE(sysreset_sandbox_non_fdt) = {
97 .name = "sysreset_sandbox",
98 };
99